Describe how Arthur Miller creates an exciting climax Essay

â€Å"Describe how Arthur Miller creates an exciting climax for both acts of ‘A View from the Bridge'†Ã‚  Ã¢â‚¬ËœA View from the Bridge’ by Arthur Miller, is a play about obsession and betrayal. The main character, Eddie Carbone, becomes overprotective over his niece, Catherine, to the degree of infatuation. This obsession helps to cause the break down of Eddie’s marriage, as his wife, Beatrice realises the alarming nature of Eddie’s fixation. Eddie’s feelings for Catherine existed before Beatrice’s cousins, Marco and Rodolfo came, but their arrival intensifies the situation, as Eddie becomes more and more jealous of Rodolfo, and of Catherine’s love for him. This play is a tragedy and, like most tragedies, it is serious and ends with the death of the main character, Eddie. Eddie dies after betraying his wife’s cousins to the immigration bureau. As a result, Marco, who is filled with hatred and in need of justice, stabs him. Arthur Miller was a New Yorker who worked on the Brooklyn docks, for a time. His experience of the docks and of the people around them, led him to write this play, which is set there. During this coursework, my aim is to study the ends of the two acts in depth to see what techniques Miller uses to make them dramatically effective. 1. During the last scene of act one (from page 39 when Catherine puts ‘paper doll’ on the phonograph) we find out about the relationships of characters in more depth. The scene  2. Our understanding of this plays characters changes considerably in this final part of act 1. Marco who seemed, prior to this scene, to be quiet and shy shows what he actually feels by demonstrating his feelings about Eddie  3. There are many surprises in this scene, we as an audience do not expect Marco who has previously been shy and quiet to make such a blatant challenge as he does in this scene 4. This last scene in act one is used very effectively by Arthur miller to sow the seeds of events which are going to happen in the 2nd act of the play  5. The action in this scene Marcos action of holding up a chair triumphantly in front of Eddie is an interesting and significant action because the chair seems to be a symbolic weapon. Marco is threatening Eddie with it but, in contrast, he actually uses a weapon to kill Eddie in the final scene of the play.  6. although there seems to only be one conflict between characters in this (the one between Marco and Eddie; with the chair) there are actually many 7. This final scene leaves many questions unanswered. The conflicts between the characters in this scene could lead the audience to speculate as to how things will develop in the next act but although this scene gives the audience, some idea of how things turn out it does not tell them everything. They may ask themselves what is going to happen to Catherine and Rodolfo’s relationship since it seems plain that Eddie dislikes Rodolfo and disapproves of his relationship with his niece.  8. Particularly interesting characters within this scene are Marco, who has changed so much and is so different in this final scene of act one to the previous part of the play. 9. The Characters in this scene are very interesting to observe on their own but it is also interesting to see how Arthur Miller has contrasted the actions of his characters in this scene. One such contrast is that between Marco and Eddie. Eddie uses Aggressive action, such as boxing to make his point whereas Marco’s subtle challenge with the chair is non aggressive but yet still makes the intended point. These contrasts between the two men’s actions are very interesting and are very effective in demonstrating the diffe 10. Emotions of the audience towards characters are mixed. They may feel happy for Catherine and Rodolfo in that they’ve found each other and seem so happy. Some may speculate, however about that this relationship’s days are numbered due to Eddie’s obviously hostile feelings towards rodolfo. 1. The situations that develop in this play would be difficult for anyone to deal with. Eddie finds the situation that he is in especially difficult and consequently he is seriously affected by it. In this play Eddie goes from being a popular man, respected in the community to being a man willing to betray his own family and, in the final scene one prepared to kill. Eddie started by just being over protective of Catherine, which developed into jealousy of Rodolfo because Catherine loved him and this, in turn developed into passionate hatred of both Marco and Rodolfo. Eddie hardly understands what he himself is feeling at the end of the play. These emotional changes are central to Arthur miller’s play since they help to cause the chain of events leading up to the final tragic end and are very important in creating interest and drama in the play.

12 Angry Men: Jury’s Conflict Involved on Verdict Essay

Any jury trial is bound to have some sort of conflict involved when coming to a verdict. The portrayal of a murder case in the movie, 12 Angry Men, involves many different examples of conflict, as well as the approaches to conflict used by different characters. Almost every conversation in the film involves conflict, since the characters are all debating whether or not the boy being tried for murder is guilty or not, but there are a few scenes in which different types of conflict and different approaches to conflict seem to stand out. The room in which the men are sitting and debating the case has a table with each of the men sitting around it. Jury member number one, who sits at the head of the table, takes on the role as the leader of the discussion by formatting how the voting goes and asking all members whether they agree to any decisions made. In one scene, the older man with the summer cold comes over to jury member number one and tells, â€Å"stop being a kid. K. I. D. Kid.† Jury member number one responds, â€Å"Just because I am trying to keep this thing organized? Here, you take the responsibility. I’ll just keep my mouth shut, that’s all.† This scene is an example of Ego/Identity conflict because of the beliefs that the man with the cold see’s jury member number one as being a kid because he is younger than him. Jury member number one seemed to take the responsibility of leading the group just because of his number, but the man with the cold seemed to get upset and cre ate a conflict with him because of his age. See more:  Social Satire in The Adventures of Huckleberry Finn Essay The different types of characters in the jury decision create many different examples of approaches to conflict. Jury member number two, the quiet man with the glasses, becomes the target of many of the other characters. When the men are all going around and explaining their reasons for why they feel the boy is guilty, Jury member number three interrupts and says, â€Å"what about the switch-knife found in the man’s chest?† Jury member number two says, â€Å"Wait a second, there are some people who haven’t talked yet, shouldn’t we go in order?† Jury member number three says, â€Å"forget about the people who haven’t gone yet, be quiet will ya?† This causes jury member number two to quiet down and not respond. This approach to conflict is an example of competing because of the win-lose outcome of the conflict. Jury member number three makes sure that he uses his alpha male status and shuts down jury member number two without any complai nt. The last situation is an example of conflict as well as the approach to conflict. When the men choose to make an anonymous vote and one of them writes â€Å"not guilty† on the paper, jury member number three calls out the man who had grown up in the slums and says that he changed his vote because he fell for the preaching of the first member who felt the boy was not guilty. After yelling at the man, the old man finally admits to changing is vote. Later, jury member number three attempts to apologize for calling out the man who grew up in the slums and he just walks right past him without responding. This is an example of Ego/Identity conflict because jury member number three judged the man who grew up in the slums and expected him to change his vote because of his past. The approach to the conflict later is avoidance because the man who grew up in the slums chooses to not respond to the apology and walk right past the man without getting into any type of conflict.

Review Low Back Pain Treatment Health And Social Care Essay

In publically provided health care systems, limited resources coupled with limitless demands result in determinations holding to be made about the efficient allotment of scarce resources. This rationing of the services raises inquiries of how services should be provided ( for illustration, how should patients with alone wellness conditions such as nephritic failure/cancer be treated? Should centralised clinics with increased expertness, but increased travel clip for patients, be introduced? ) . Should we prioritize certain wellness conditions more than others based on quality added life old ages? Given the deficiency of a market for wellness attention ( Free wellness attention in UK ) , economic rating techniques try to inform such determinations. This essay aims to critically research the Outcome rating techniques such as QALY ‘s, Contingent Valuation ( Willingness to pay ) and distinct pick experiment for the intervention of Low back hurting and dementedness.Low Back hurting & A ; Dementia:Low back hurting is a common ailment and although non dangerous, it causes great uncomfortableness and has significant economical impact. In Netherlands, the entire costs of low back hurting have been estimated at 1.7 % of the Gross National Product. It has been estimated that the costs of production losingss account for approximately 84 % to 96 % of the entire costs for low back hurting in Western societies. In the UK, an estimated 16 % of the grownup population consult their general practician for aid with back hurting in a 12-month period. The one-year cost of lower dorsum hurting to the NHS has been estimated at approx ?480 million and the load of lower dorsum hurting is estimated at over approx ?10 billion per twelvemonth in foo tings of lost productiveness and illness benefits. The major societal and economic loss due to moo back hurting indicates the demand to find the most cost-efficient intercession for these patients. Low back hurting is a slackly coined term as it encompasses multiple and complex conditions which requires a varied direction attack. The direction of the status is based on its anatomy, physiology and continuance of the symptoms and hence the cost of handling it varies. Therefore accurate economic rating of low back hurting may be end far in front. However for the intents of this essay Low back hurting is dealt as one status for economic rating techniques. â€Å" Dementia is a progressive and mostly irreversible clinical syndrome that is characterised by a widespread damage of mental map † ( NICE 2006 ) . Although many people with dementedness retain positive personality traits and personal properties, as their status progresses they can see some or all of the undermentioned: memory loss, linguistic communication damage, freak out, alterations in personality, troubles with activities of day-to-day life, self-neglect, psychiatric symptoms ( for illustration, apathy, depression or psychosis ) and out-of-character behavior ( for illustration, aggression, sleep perturbation. Dementia is associated with complex demands and, particularly in the ulterior phases, high degrees of dependence and morbidity. This attention needs frequently challenge the accomplishments and capacity of carers and services. As the status progresses, people with dementedness can show carers and societal attention staff with complex jobs including aggressive behavior, restlessness and roving, eating jobs, incontinency, psychotic beliefs and hallucinations, and mobility troubles that can take to falls and breaks. The impact of dementedness on an person may be compounded by personal fortunes such as alterations in fiscal position and adjustment, or mourning. These two conditions are distinguishable in nature as the affected age groups vary between these two conditions and hence the economic impact on society. Furthermore direction of dementedness involves an integrated attention between wellness and societal systems.Quality Adjusted Life Year ‘s ( QALY ‘s ) :â€Å" A quality-adjusted life-year ( QALY ) takes into history both the measure and quality of life generated by healthcare intercessions. It is the arithmetic merchandise of life anticipation and a step of the quality of the staying life-years. â€Å" ( NICE, 2008 ) A QALY places a weight on clip in different wellness provinces. A twelvemonth of perfect wellness is deserving 1 and a twelvemonth of less than perfect wellness is worth less than 1. Death is considered to be tantamount to 0 ; nevertheless, some wellness provinces may be considered worse than decease and have negative tonss. QALYs provide a common currency to measure the extent of the benefits gained from a assortment of intercessions in footings of wellness related quality of life and endurance for the patient. When combined with the costs of supplying the intercessions, cost-utility ratios result ; these indicate the extra costs required to bring forth a twelvemonth of perfect wellness ( one QALY ) . Comparisons can be made between intercessions, and precedences can be established based on those intercessions that are comparatively cheap ( low cost per QALY ) and those that are comparatively expensive ( high cost per QALY ) . However, the usage of QALYs in resource allotment determinations does intend that picks between patient groups viing for medical attention are made expressed and commissioners are given an penetration into the likely benefits from puting in new engineerings and therapies. While QALYs provide an indicant of the benefits gained from a assortment of intervention processs, in footings of quality of life and endurance for patients, they are far from perfect as a step of result ( NICE, 2008 ) . For illustration, the usage of QALYs as a individual result step for economic rating means that of import wellness effects are excluded. QALYs besides suffer from a deficiency of sensitiveness when comparing the efficaciousness of two viing but similar drugs and in the intervention of less terrible wellness jobs. Chronic diseases, where quality of life is a major issue and survival less of an issue, are hard to suit in the QALY context, and there is a inclination to fall back to the usage of disease-specific steps of quality of life ( Philips, 2009 ) Similarly, preventative steps, where the impact on wellness results may non happen for many old ages, may be hard to quantify utilizing QALYs because the importance attached to each of the wellness dimensions is extremel y dependent on age, life context and life duties. For illustration, it is really hard to compare the wellness position of a possible title-holder who suffers a hamstring pang in the warm-up session with that of an aged individual who has been restored to some step of mobility as a consequence of an intercession. Further unfavorable judgments have surrounded the unequal weight attached to emotional and mental wellness jobs, and the deficiency of consideration of the impact of wellness jobs on the quality of life of carers and other household members, while much argument environments who should be involved in puting values on wellness provinces ( Nord et al 1999 ) . Discussion has besides focused on how much society should be prepared to pay for a QALY. While there is a grade of consensus that it should by and large be between ?20,000 and ?30,000, considerable argument has arisen in relation to, for illustration, interventions used at the terminal of life or for ultra-orphan condition s, where higher thresholds have been advocated and used. However, the usage of QALYs in resource allotment determinations does intend that picks between patient groups viing for medical attention are made expressed. Commissioners are progressively faced with resource restraints and have to prioritize their outgo against an ceaseless flow of new engineerings and therapies that all claim to heighten the wellness position of peculiar patient groups. QALYs and cost-utility analysis provide extra information for decision-makers as they grapple with turn toing the healthcare quandary of where to apportion resources to bring forth the maximal wellness benefits for their communities and society as a whole ( Philips 2009 ) . Although the usage of QALYs is backed by a strong research docket, of import methodological issues still remain to be resolved. For illustration, different rating techniques give rise to incompatibilities in public-service corporation values for similar wellness provinces, doing serious dependability jobs. Another good known but unsolved issue concerns the difference between the public-service corporation of a wellness province expected by healthy individuals and the public-service corporation of this wellness province really experienced by patients, frequently confounded by version to disablement and disease. This raises farther concerns about the content cogency of derived QALYs.Low back Pain- QALY ‘s as Outcome Measure:Management of Low back pain chiefly constitutes of Physiotherapy, Osteopath, stylostixis and other curative modes with lesser medical/surgical intercessions. This displacement of direction attack has added benefit in economic footings. A assortment of these in tercessions are available for low back hurting but the effectivity for most intercessions has non yet been assessed. Recent literature indicates that exercising therapy, behavioral therapy, and back school plans are the most promising intercessions. Several cost-effectiveness analyses of exercising therapy was performed. However, the analyses were hard to compare due to heterogeneousness in the survey population and therapies to which the intercessions were compared. Goossens et Al, 1998 found no statistically important differences in cost effectivity between behavioral therapies. A cost-effectiveness survey of back schools showed that a low strength back school was more cost effectual than usual attention and a high strength back school. Two surveies found a important decrease in absenteeism for a ranked activity plan in occupational wellness attention. Van Der Roer et Al, 2008 studies the consequences of an economic rating performed alongside a randomized controlled test comparing an intensive group developing protocol to physiotherapy guideline attention. They studied the cost effectivity of an intensive group developing protocol versus guideline physical therapy in patients with nonspecific chronic low back hurting. The direct wellness attention costs were significantly higher for patients in the protocol group, due to the comparatively high costs of the protocol itself. No important differences were found for functional position, hurting strength, general perceived consequence, and quality of life. As there were no important differences in entire costs, they concluded that the intensive group developing protocol was non cost effectual compared with guideline physical therapy. A restriction of this survey is the limited figure of patients who participated in the test. Particularly for observing relevant differences in costs, big Numberss of patients are required, because cost informations have a typically skewed distribution. A matter-of-fact survey by Duncan et Al, 2007 compared the effectivity and cost-effectiveness of three sorts of physical therapy normally used to cut down disablement in chronic low back hurting. This survey used QALY as one of the result step to inform the economic benefits of these intercessions. Economic analysis is still unusual in rehabilitation surveies ; yet in this test, it reveals of import differences between intercessions that are non evident from clinical result steps. Promoting self-help is an of import purpose in back hurting direction and economic analysis is a agency of quantifying how successfully this has been achieved. Because low back hurting has such high societal and wellness service costs, including an economic analysis in future rehabilitation tests helps policy-makers to make up one's mind how to pass limited health care resources. This highlights the benefits of usage of QALY ‘s in Low Back hurting surveies.QALY ‘s in Dementia:Using QALY ‘s as an economic rating tool for measuring dementedness has invited immense unfavorable judgments by medical opposite numbers every bit good as the pharmacological medicine industry. One of the statements is that Dementia is a multifaceted job which spans across wellness and societal attention and QALY ‘s are non sensitive plenty to pick up these issues. The value set by NICE for per QALY twelvemonth is non sufficient in dementedness as primary intervention involves drug intervention and value added life for a aged individual is non reflected good plenty utilizing a QALY. Furthermore, the effort to utilize a individual QALY criterion on all patients has non been without contention. The recent determination by the National Institute for Clinical Excellence ( NICE ) , to curtail usage of Alzheimer ‘s disease ( AD ) drugs in all but the most earnestly sick patients, those with advanced phases of the disease, was met with a whirlpool of unfavorable judgment by patient protago nism groups, doctors, and industry administrations. The controversial NICE determination was based on the judgement that the four available AD drugs ( donepezil, rivastigmine, galantamine, and memantine ) were non â€Å" cost-efficient † ( NICE 2006 ) . Due to this complex wellness and societal attention impact caused by dementedness the result rating utilizing QALY ‘s does non reflect the existent demand whereas a WTP and Discrete pick experiment might be an more appropriate tool. Furthermore QALY ‘s does non measure the impact of the wellness status on the carers and relations which will be the instance with dementedness whereas a WTP or a DCE will take this into history.Discrete Choice Experiment ( DCE ) :Discrete pick experiments are an property based step of benefit that is based on the premises that foremost, healthcare intercessions, services, or policies can be described by their features ( or attributes ) and secondly, an person ‘s rating depends on the degrees of these features ( Ryan et al 1997 ) . Discrete pick experiments were introduced into wellness economic sciences as a technique to travel beyond the quality adjusted life twelvemonth ( QALY ) paradigm. Users were concerned with many facets of wellness attention beyond wellness results. Such factors included waiting clip, location of intervention, type of attention ( for illustration, surgical or medical ) , and staff supplying attention ( adviser or specializer nurse ) and were referred to as procedure properties. Discrete pick experiments allow probe of the tradeoffs between such procedure and wellness results attributes ( Ryan et al 2003 ) . Applications of distinct pick experiments have been extended to see supplier penchants such as strength of infirmary advisers ‘ penchants for assorted facets of their work. More late the technique has been used to value wellness results in the proviso of attention ( frequently beyond those valued within the QALY ) . At the methodological degree, surveies find that respondents will finish distinct pick experiments in an internally valid and consistent mode ( Viney et al 2002 ) . An of import inquiry in the usage of any study technique is that of external validity-that is, do persons act in world as they province in a conjectural context? Although limited research has been conducted in this country and future research is clearly of import ( which is the instance for all economic rating techniques, including those used in the QALY model ) , experience from other countries such as the rating of environmental goods and services implies that we can be optimistic. Given the function of the NICE in doing recommendations refering optimum interventions, can it do usage of DCE? The institute is under increasing force per unit area to take history of patients ‘ penchants. To day of the month systematic consideration of such penchants has been limited. Typically public penchants are required to arouse quality weights in the QALY paradigm. This is non adequate since patients may value outcomes otherwise to the populace and have penchants over facets of attention beyond QALYs. NICE plans to hold a patient centred rating of engineerings in add-on to the current appraisals of clinical and cost effectivity. Using the attack of distinct pick experiments allows the integrating of patients ‘ values on all facets of attention in one step. We will be able to see how patients trade different wellness results every bit good as procedure type attributes, aboard each other. Evaluation of procedure and wellness results from the patients ‘ positio n may good take to decisions that struggle with the recommendations of the cost per QALY attack. This is more likely to be the instance in comparings of engineerings that differ with regard to outcomes beyond those measured in a QALY, every bit good as procedure properties. However DCE external cogency is problematic in wellness context as opposed to QALY. Hence in footings of dementedness DCE is a better attack to QALY and in instance of Low back hurting QALY is a better attack than DCE.Willingness to Pay ( WTP ) :Willingness to pay is the conjectural step where a person is willing to pay a pecuniary value for a intervention or merchandise and it can besides be expressed as the sum of trade off a individual is prepared to see for one intervention to another due to budgetary restraints. The suggestion is that wellness economic sciences lags behind other countries of economic sciences that have embraced these methods, in peculiar environmental economic sciences. Two chief methods hav e been employed in WTP: the ‘contingent rating method ‘ ( CVM ) and ‘choice experiments ‘ ( CE ) – the method once known as conjoint analysis. These methods have by and large been used to put a pecuniary value on a bundle of wellness and/or non-health benefits in the context of a specific intercession. Yet economic rating within the wellness attention field remains dominated by cost-effectiveness and cost-per-QALY analysis. Health attention remunerators have been loath to encompass cost-benefit analysis based on WTP methods ( Cookson, 2003 ) . And most wellness economic experts have preferred to polish the cost effectivity attack instead than to develop new WTP methods ( Cookson 2003 ) . Why is this? Advocates of WTP methods suggest it may be partially due to a common but erroneous perceptual experience that WTP surveies are ‘somehow supportive of policies aimed at taking the proviso of state-supplied wellness services ‘ ( Hanley et al 2003 ) . It may besides be due to the fact that stated penchant WTP methods suffer from two serious ( and perchance related ) measuring biases that render them unattractive to wellness attention determination shapers. First, WTP responses tend to be under sensitive – although non needfully wholly insensitive – to the magnitude of benefit ( Bateman et al 1997 ) . This includes both ‘scope effects ‘ , affecting different measures of the same good, and ‘nesting effects ‘ ( or 'embedding effects ‘ or ‘part-whole prejudice ‘ ) , affecting one good incorporated within a larger package of goods ( Bateman et al 1997 ) . Scope effects are peculiarly strong in relation to wellness hazards. Using high quality contingent rating study designs, and strict experimental methods, research workers have found that people tend to province a similar sum – approximately ?50 – for any given magnitude of decrease in the hazard of decease or hurt ( Beattie et al 1998 ) . This has the consequence of overstating implied pecuniary values for life and wellness for comparatively little hazard decreases. More by and large, under-sensitivity to the magnitude of benefit tends to blow up ratings of intercessions that yield comparatively little benefits. Second, WTP methods tend to blow up ratings of the specific intercession that respondents are asked about, comparative to intercessions that respondents are non asked about. Asking respondents to concentrate on one specific intercession in isolation Acts of the Apostless as a sort of amplifying glass for stated WTP, When asked to see an intercession in isolation, people are willing to pay amounts of money far in surplus of what they are willing to pay when asked to see the same intercession in relation to a scope of other intercessions. This is sometimes known as ‘budget restraint prejudice ‘ ( Mitchell et al 1989 ) . Unlike the rational economic adult male of standar d economic theory, study respondents may be unable to budget at the same time for the full scope of possible public and private goods and services they require. So valuing each point in isolation can take to sum sums of WTP in surplus of the available budget. WTP methods therefore tend to be biased in favor of ( 1 ) intercessions that deliver comparatively little benefits, and ( 2 ) the peculiar intercession being evaluated, as opposed to other 1s non being evaluated. These are serious defects in a wellness attention context, where the majority of economic rating activity is directed towards informing reimbursement determinations about dearly-won new wellness attention engineerings. These engineerings tend to offer incontrovertible but comparatively little wellness benefits. WTP methods take history of chance costs more exhaustively than cost-effectiveness analysis ( Oliver et al 2002 ) . Cost-effectiveness analysis takes history of chance costs utilizing an incremental cost-effectiveness threshold, which represents an expressed premise about the cost-effectiveness of a ‘typical ‘ alternate intercession. By contrast, WTP methods take history of chance costs by giving respondents the Willingness to pay and DCE in footings of Low back hurting is hard to quantify as it usually consequences in a conjectural value and QALY ‘s inform wellness related results in a better mode. However in instance of complex Low back pain a combination of these economic rating techniques will be more efficient instead than utilizing a QALY ‘s in isolation. With respects to dementia DCE and WTP tends to turn to the tradeoff every bit good as the Complex demands placed on the wellness and societal attention.DecisionEconomic rating techniques are important for the hereafter wellness attention resource allotment as rationing of these resources are acquiring harder due to fiscal restraints. Each of the economic rating techniques has its strengths and failings. However applied on the right context and in appropriate conditions makes it more efficient. Low back hurting and dementedness are alone wellness conditions with complex multifaceted jobs necessitating different economic rat ings to be efficient. However a combination of these techniques is important to turn to the inefficiencies of these techniques. Further research in these countries is indispensable to find the economic ratings of the wellness attention industry.

Rhetorical Analysis Research Paper Example | Topics and Well Written Essays - 500 words

Rhetorical Analysis - Research Paper Example The ethos aspect, emotional appeal, of the article is significantly strong. Mr. Roger Cohen is a renowned author, columnist and journalist. (A General Summary of Aristotle's Appeals . . ., n.d.). He has extensive experience in foreign correspondence and his work reflects his far-reaching credentials. Considering the writer’s authenticity and credibility, the article carries much weight and strength. However, there is a point worth consideration here. To write about Britishers’ sentiments about London Olympics, probably, is a little out of Roger Cohen spectrum of expertise. In a way, this article can be regarded as a casual, off-road piece of writing for a usually seriously-political content-writer such Roger Cohen. His role in the article is important and provides basis for the basic structure of the writing. He sets the tone as casual and light-weighted. More importantly, using his imaginative-fluency, he carefully carves the primary style to be used in the article from start to end. He uses the indirect approach whereby he creates an opposite scenario at first in the initial paragraph to introduce the main scenario of the article that worked well in the general discourse of the whole writing. Moving on to the content of the article, it is safe to say that he articulated this piece with a commendable choice of words and expression to produce an interesting read. He enjoyed the liberty to develop coherent pre-body scenarios and post-body conclusions. The logos aspect (The Rhetorical Triangle: Understanding and Using Logos, Ethos, and Pathos, n.d.) of it considerably appropriate; Cohen’s ability in using logic and rationality in his writing is strongly backed by his extensive experience in journalism and column-writing.

Final Case Study Essay Example | Topics and Well Written Essays - 500 words

Final Case Study - Essay Example For his first year at a preschool that uses reverse mainstreaming that will let Dennis interact and learn with typically developing children, the following IEP objectives and corresponding supports are proposed: Supports: As Dennis enters his preschool years, his PWS would be evident with apparent obesity if not controlled and monitored. It is therefore necessary that his nutritional and dietary needs be given attention. It must be noted that his entry into preschool was characterized by the absence of a comprehensive dietary and medical evaluation which should be produced if his IEP is to be a success. The parents, teachers and other school personnel (those who are in charge of preparation of snacks for example) must have this evaluation before he starts his school year. Calorie intake especially carbohydrates must be limited because those children with PWS need less than typically growing children. During snack times, the teacher in cooperation with the school dietitian should modify his food, allowing for prescribed caloric intake according to his nutritional evaluation. His physical development throughout the year should be monitored throughout the year, looking out for the proper balan ce between height and weight. Supports: It must be noted that Dennis from the 45-minute observation that he

Letter to the dean Essay Example | Topics and Well Written Essays - 500 words

Letter to the dean - Essay Example The class as illustrated above has had the problem of non-participatory tendencies for quite some time now and it is good that the issue has been highlighted by Ms. Karan. To this extent the students have showed no positive change of this behavior and with this we have seen as teachers that appropriate measures need to be taken to avert this sooner rather than later. These situations of having a lazy class usually results in the teachers too to have low morale in teaching the respective students. This goes a long way in dictating their performance and competence in the areas taught. It is a common scenario to have this but when it persists then the issue needs to be forwarded to the relevant authorities for appropriate corrective measures to be taken. I hereby write this confirmation letter to assert that what Ms. Karan has said about the class is the sheer truth and it is a mutually shared sentiment by all the teachers teaching these students. The laziness has in many ways affected the mode of teaching and learning in that class. As is usually the case with the profession, a teacher is supposed to seek audience from the students and that the same students need to reciprocate by participating in the class activities like asking and answering questions, developing ideas stated by others and the teacher, bringing in new ideas and the general attention required. This I am afraid is lacking quite a great deal in this particular class and teaching has therefore been made rather difficult by this situation. After meeting these students with Mr. Kamal we have come to a conclusion that there needs to be a solution to this problem within the shortest time possible. These students should first say what their issues are with the learning system and thereafter necessary measures taken. This not withstanding, it is important for us, the teachers, to sit down and think of what the root cause of this is

Slavery in Civil War Era Coursework Example | Topics and Well Written Essays - 1500 words

Slavery in Civil War Era - Coursework Example These came to be known as the Confederate States whose members were slave-owning states, and this led to the prominence of two men whose views on slavery were entirely opposite of one another. The first is Abraham Lincoln who was among the biggest proponents of the eradication of slavery in all the states within the union, and the other is Jefferson Davis who was a principal proponent of the institution of slavery and believed that it was a necessary part of the economy at the time. These two men shall be discussed in this paper in relation to their positions on the institution of slavery. The institution of slavery lasted for over three hundred and fifty years in what is today the United States until it was finally abolished in the eighteen sixties. It was one of the most brutal and dehumanizing institutions in the annals of the human race with the greatest victims being the African slaves. African slaves were imported like commodities from Africa to work in the large white-owned pl antations because they could withstand those European diseases, which normally killed the Indian slaves. Moreover, the ability of the Africans to work in the harsh conditions of a hot sun was seen to be an added advantage for their conversion to slaves. Europeans used various means to justify their enslavement of Africans, and one of these was that the bible stated that they were the children of Ham and that they had been cursed to be slaves to the other races that were descended from Noah. Another justification was the belief that Africans were subhuman; such that they were inferior to the white race and that because of this it was justifiable to treat them in any way one wanted because they had no human feelings at all. These highly mistaken concepts ensured that slavery continued, and many Africans were brought to America and forced to undertake tasks under extremely harsh and brutal conditions for the sake of making a profit for their masters. It is for the purpose of ending thi s institution that the American Civil War took place.

Are social problems socially constructed or biologically determined Essay

Are social problems socially constructed or biologically determined - Essay Example There are a number of social constructs that exist in the times of today and the same have been for our understanding for so long now that they have started to seem pretty much a part and parcel of our very existence. The aspects of femininity and masculinity are something which is easily bracketed under the social constructs heading and this has been case for quite a number of decades now, if not centuries. The related linkages are predominantly the root cause for these social constructs to arise in the first place. Social constructs within the domains of social problems are indeed the entities which have been institutionalized in a social hierarchical system and which have been invented or constructed by a number of different participants which are in essence part of those very systems. These social constructs are remnant of the society or the culture that we are talking about and the same exist because people have followed the related regimes for so long now that it has become a part of their system, their day to day thinking mindset and the impending approach which has come about due to the very same. These social constructs could also be in line with the different traditional rules which are being followed over a period of time and then there are the discussions related with the conventional thinking and analysis hierarchies. The aspect of social constructionism looks to suggest some ways within the understanding module of the social constructions where detection of the same aspects are als o judged and found out. The analysis forms an important ingredient of the very same subject. Social constructs are pretty different from the social realities that exist within a society or a culture since the latter focuses more on the real happenings and not what the whole ideology or the thinking mindset can and cannot be. What this brings to light is the fact that the social constructs look to narrow the basis for the developing

Comparison and contrast of 2 composers of the Boroque period Essay

Comparison and contrast of 2 composers of the Boroque period. (instructor has 5 composers to chose from - Essay Example In Rome, George Frederic Handel is believed to have survived Arcangelo Corelli (1653-1713) music career who was the bestselling Baroque musician in Rome. Henry Purcell from England at the same time was the bestselling baroque musician in England. Although he did not live for long before he met his death, Purcell made the very best from the flowering music career. Many prolific composers of the baroque period traced their roots from Rome and Handel was no exception. Most of their compositions was purely based on the roots, and tried to connect their current happenings with their past lifestyles. This approach made their works unique, because it was not an imaginary composition, but they composed on real life situations which made a lot of difference in their lives. His predecessor Corelli was highly appreciated and his influence was to later extend to the entire Europe continent. Corelli’s influence, which could not have been ignored by anyone interested in becoming a composer in the entire Europe. This is because he had a good grasp of happenings and his approach to lifestyle music was capturing big audiences. Handel is later reported to have partnered with young Scarlatti whom they performed together before Cardinal Pietro Ottoborni in Venice. This was a huge milestone for Handel and his blend with Scarlatti’s keyboard sonatas was unmatched. The 1600s was a period of political upheavals in England where they were changing from autocratic to parliamentary monarchy. During this change in leadership, a musical leader was born, and a history would have it, the born leader would later carry the music mantle and end up being one of the finest at his time. Henry Purcell was born in the year 1969 and didn’t live for long. However, his years on earth were of great impact to the music industry. Much of his time was accorded to writing operas which were musical dramas and incidental stage music. His passion for music

The Realities of Post-Modern Society Have Made the Concepts of Youth Essay

The Realities of Post-Modern Society Have Made the Concepts of Youth Culture and Youth Subculture Redundant - Essay Example In this paper, I plan to analyze youth subcultures of the past; their significant characteristics, also seek a definition of ‘postmodernism’ and how it fits our world and culture, as well as the effect that changes in the post- postmodern world have had on youth cultures.I also hope to justify the theory that globalization, and free media practices have helped form a globally uniform youth culture; or rather, a culture where the youth aren’t liable to set themselves apart, but prefer to stick to societal norms. Youth Subcultures refer to the cultural preferences and tendencies exhibited by groups of young people which differ from the practices of the dominant groups. Youth cultures often differentiate themselves from others in respect to their musical tastes, distinctive fashion and shared names, which are names that the sub-groups in the youth culture assign to themselves and each other to differentiate them from the others. These names are like rappers, punks, g eeks, and nerds for example (ENCARTA). Frequently, youth subcultures are formed due to differences in social class, gender and ethnicity. The need of youth to express their distinction from (or as a way of rebelling against) the dominant culture by using a different mode of expression, or changing their lifestyle— which reflect their attempt to solve simplify what they perceive are flaws in a society’s make up.'s make up. Youth cultures are often said to have gained popularity after World War II and the boom in the consumer-based boom in the economy which created a market specifically for the youth. However historic evidences also exist of youth cultural groups differentiating themselves from the other age related groups. However most of these youth cultural groups have been found in western society. However in recent years there has been a change observed in the overall atmosphere as instead of youths being specifically divided into sub-groups of their own youth culture, they often tend to shift from one social group to another in no fixed pattern (Kahn and Kellner). The choice of becoming a member of any group they wish is the contemporary aspect to the postmodern society. And this is what will be analyzed throughout the course of this assignment. History of Youth Subcultures Since the 1950's, distinctive youth subcultures have come to the forefront. They seek to be different through their music, their clothing, and their lifestyles. Similarly, members of subcultures seek to show their individuality by being (ironically) choosing to be part of a clique, and sharing a title. Youth subcultures have become an object of study from the 1950's onwards. It has been theorized that the growth of a consumer-oriented society, and the media and advertisers focus on youth and beauty have made youth the dominant culture of Western societies. Subculture theorists study the symbolism attached to clothing, music, and other distinguishing articles (such as body art, and dialect) by members of the subculture and also the ways in which these same symbols are interpreted by members of the dominant culture. According to wikipedia.com, Subculture theorist Dick Hebdige states that the a young individual shows his willingness to be a part of a subculture by making concrete choices in his clothing styles, hairstyles and footwear. However, abstract elements, such as common interests, dialects and slang, music genres and gathering places can also become deciding factors. Youth subcultures are popular as they provide young people with

Professional Project - Rehearsal Studio Literature review

Professional Project - Rehearsal Studio - Literature review Example Using Space for Artistic Needs The main use of a rehearsal studio is to help to stimulate an environment and create a space for musicians and other performers. If there aren’t spaces available, then it becomes difficult to prepare for performances, recording and other alternatives that are needed to be a growing musician. In a specific study, (Fewster, Wood, 2009), there was an examination of whether musicians and artists required spaces for performance. The comparison made was to virtual environments that led to a hybrid experience with technology as well as other alternative environments which were available for rehearsing. Through this study, it was found that the change in environment also led to direct changes in the formation of music. When the rehearsal space was used through a 3D alternative or virtual collaboration space, for instance, the environment changed to create a hybrid effect. This combined higher amounts of technology with the music, as opposed to having the needed performance options. The environment with the space was able to offer a different sense of experimentation, specifically with interactions between the members that allowed for collaboration to move forward in a different alternative (Fewster, Wood, 2009). The concept of changing the environment and the mood with collaboration is important for various reasons. For those collaborating with several individuals is the ability to interact differently and to allow creativity to move into a different set of alternatives. This offers new levels of professionalism and enhances the creativity needed through the use of space. The environment is combined with the concept of using creative space. When the creativity is in the surrounding environment, it becomes easier for musicians and other artists to collaborate and work toward enhanced materials. The development of the creative space provides more opportunities to find unique aspects to a band or group while offering an outside area i n which musicians and others can perform. The important aspect to consider is based on investing in the creation of space that enhances creativity and which is conducive to the needs of artists, specifically because this changes the reactions and opportunities available through a given area (Martin, 2010). It should be noted that the ability to offer a rehearsal space isn’t only dependent on musicians with specific needs. Rehearsal space is also changing shape and form because of the emerging technologies and the need to have collaborative areas for those interested in music. The concept of body space activity is one which is now being used among musicians and other performers. However, the ability to produce these activities is also dependent on having other applications and technologies within the space. For instance, recording equipment, materials and other applications which can form specific roles can be used for creative needs. The most common alternatives which are now in the UK are based on the use of creative spaces in urban regions, which has expanded the idea of rehearsal spaces. This is one which is now inclusive of an environment for creativity as well as materials that provide physical access to those who wouldn’t have the options available in another given arena (Tandt, 2006). Socio-cultural Changes

Guidelines for Proposal Write Up and Presentation Essay Example for Free

Guidelines for Proposal Write Up and Presentation Essay The proposal should be about 2-4 pages. The basic content can be as follows. 1.1 Executive Summary An Executive Summary, which provides a brief (about two paragraphs) overview of the proposed project. This is probably the most important section of your proposal, because it provides a clearly defined problem and proposed solution procedure, and a description of the expected project deliverables. The Executive Summary is often the only section of your proposal that some readers will read; and must present all the relevant information as clearly and effectively as possible. It is often the last thing to be written. 1.2 Goal The specific objectives of project. What are the defining features and benefits of this product? 1.3 Background and Motivation What are the needs or problems that you are trying to address? Why do these needs (still) exist? Why are these problems worth solving? Who is the customer? Write 2-4 paragraphs. -What is the setting and history behind this project? -What is the problem to be addressed? -What are some current approaches to this problem? -Why is this problem worth solving or worth solving better? -How will this product be better than previous approaches? 1.4  System Architecture and Approach This section identifies the approach that the team will use to meet the project objectives. You should explain here your principal tasks, their  duration, their sequence and their particular purposes. Wherever possible, the methods and task to be performed should be outlined in logical sequence and explained in detail. Do not assume the reviewer will fill in the gaps in your logic. A common way of identifying project milestones and due dates is to use a graphic representation of the task relationships, such as a Gantt Chart (a bar chart showing timeliness for each principal task) or a PERT/CPM Chart (a network representation of the project that shows the sequential relationship between project activities). The Solution Procedure should also describe the relevant instrumentation and facilities required to complete the research or product development. The Solution Procedure should include a budget that estimates the anticipated RD costs over the life of the project. Wherever possible , provide sufficient commentary on the budget to facilitate 1.5 Deliverables Briefly list project deliverables. When you are done, what will you deliver to the customer? 1.6 Team Organization (Optional) This section provides a summary of the groups qualifications for the project. Identify key personnel and describe directly related education and experience. Also include each members responsibility for the duration of the project. An organizational chart to identify the specific areas of responsibility of each team member may be appropriate. 1.7  Required Resources (Optional) The list of resources/help that you hope to get from the instructor. 1.8  Time Table Part of the proposal will be a proposed schedule. This time table will be used to evaluate and manage the project. Key assumptions that affect the plan should be documented here. The project plan should be updated throughout the life-time of the project. Examples at: http://readyset.tigris.org/nonav/templates/plan.html 2 2.1  Project Proposal Presentation  Length 10 to 15 minutes presentation + discussions afterwards, in total 25min each person. If you decide to use powerpoint, you should prepare for 10-15 pages of slides. 2.2 2.3 Motivation (the same as proposal write-up) Input/Output Define the task. Show some brief examples that will be produced by by your project. 2.4 System Architecture (the same as proposal write-up) If the project includes many components, you can select the most crucial parts to present. 2.5 2.6 Time Table (the same as proposal write-up) Implementation Details (optional) You could briefly talk about the approaches you are using, and why they fit into the task. 2.7 Preliminary Demo (optional) If you have some preliminary system done by your presentation date, show it to the class. 2.8 Summary and Closing Mark (optional) Briefly recaps the key points of the proposal. Summarize the current problem, the steps you propose to take to solve the problem, and the benefits to the client.

Degrading Marine Bacteria: Isolation and Characterization

Degrading Marine Bacteria: Isolation and Characterization Isolation and Characterization of (PAH) Biodegrading Marine Bacteria Sulaiman Ali Alharbi1*, M.E.Zayed1, Arunachalam Chinnathambi1, Naiyf S. Alharbi1 and Milton Wainwright1,2 ABSTRACT Polyaromatic hydrocarbons (PAH) are considered to be important and dangerous pollutants which cause serious health problems and/or genetic defects in humans, as well as harming the flora and fauna of affected habitats. In this study, we interested in determining if bacteria can be successfully used to bioremediate PAH pollution as an alternative to physical and chemical methods. The bacteria used in this study were isolated from three PAH polluted sites of Mediterranean Sea, off Alexandria, Egypt. The study is devoted to the isolation of bacteria that can degrade three low molecular weight PAHs and to determine the effect of pH on this process. Nine phenanthrene-degrading, seven-naphthalene-degrading and eight anthracene-degrading bacteria were isolated, by enrichment, from the marine water sample. All of the isolates grew on the PAHs (phenanthrene, anthracene and naphthalene) at varying rates and utilized them as sole source of carbon and energy. Key words:   Polyaromatic hydrocarbons (PAH), Biodegrading marine bacteria, Environmental contamination, Marine water, Introduction Polycyclic aromatic hydrocarbons (PAHs) are contaminants of aquatic and terrestrial ecosystems which generated continuously by the inadvertently incomplete combustion of organic matter, for instance in forest fires, home heating, traffic, and waste incineration1. PAHs constitute a large and diverse class of organic compounds and are generally described as molecules which consist of three or more fused aromatic rings in various structural configurations2. Polycyclic aromatic hydrocarbons are composed of fused, aromatic rings whose biochemical persistence arises from dense clouds of Ï€-electrons on both sides of the ring structures, thereby making them resistant to nucleophilic attack3. Environments contaminated with PAHs are deemed hazardous because of their carcinogenic, mutagenic and teratogenic effects4,5 and low molecular weight PAHs such as naphthalene (the simplest, containing two benzene rings), anthracene and phenanthrene (both of which contain three benzene rings) are also known to possess potentially hazardous health effects6. A variety of techniques have been applied to the treatment of environments contaminated by PAH containing petroleum hydrocarbons, notably physical treatments using thermal or chemical processes7. However, these treatments are generally time consuming and expensive8,9. Microbial bioremediation however, provides a potentially cheap and effective means of bio-remediating PAH-contaminated environments10. The ability of microorganisms to degrade PAHs is well documented11, 12 and microbial degradation is a major environmental process affecting the fate of PAHs in both terrestrial and aquatic ecosystems13. Bioremediation using microbes converts toxic or persistent organic molecules into harmless end products, such as carbon dioxide and water 14. Unfortunately PAHs possess physical properties, such as low aqueous solubility and high solid water distribution ratios, which militate against their rapid microbial utilization resulting in their accumulation in the terrestrial and aquatic environments1. It is imperative therefore that the factors which influence the bioavailability and decomposition of PAHs in the environment be studied and optimized7. The aim of the work described here was to screening environmental samples for bacteria that are capable of degrading PAHs and use them a sole carbon and energy source. Materials and Methods Isolation of bacteria: Bacteria were isolated from three PAH-polluted sites of the Mediterranean Sea, Alexandria, Egypt, where PAH pollutants have been continually released. All isolates were preserved in 750 ÃŽ ¼l LB culture supplemented with 250 ÃŽ ¼l of 60% glycerol and maintained at -80oC. Media used: Bushnell-Haas (BH) medium, Luria-Bertani, Nutrient broth and Blood agar were used for the isolation of bacteria. All media were prepared using distilled water and sterilized by autoclaving at 120oC for 20 min. Medium- pH was adjusted as required before sterilization using   1N NaOH or 1N HCl. Hydrocarbon stock solutions: Stock solutions of each PAH (100 mg/ml) were prepared in ethyl acetate and sterilized by filtration. Isolation of phenanthrene, anthracene and naphthalene degrading bacteria: Water samples were collected from three PAH-polluted sites in the Mediterranean Sea, off Alexandria, Egypt, where PAH pollutants have been continually released into these aquatic environments without any control. Water samples (50ml) were collected from the contaminated sites under aseptic conditions. Phenanthrene, anthracene and naphthalene degrading bacteria were isolated from water samples by spreading onto solid medium; 100  µl of each water sample was spread over the surface Bushnell-Haas agar plates containing (100, 200, 300, 400, 500 and 600 mg/l) of either, phenanthrene, anthracene or naphthalene, as the sole carbon and energy source. The plates were then incubated at 30oC for 7 days. Assay of phenanthrene, anthracene and naphthalene degradation: Phenanthrene, anthracene and naphthalene degradation by the bacteria under a variety of concentrations was determined using 250 ml Erlenmeyer flasks containing 100 ml Bushnell-Haas broth supplemented with phenanthrene, anthracene and naphthalene in the concentration range,10, 30, 50, 70, 90, 130 to 150 mg/l.. The cultures were inoculated by transferring 1 ml of nutrient broth of pre culture medium of the strain under test. The cultures were then incubated at 30oC and 200 rpm; bacterial growth was daily evaluated by measuring the increase of OD600nm of the culture. Determination of naphthalene, phenanthrene and anthracene residues in the culture medium: The concentration of naphthalene and phenanthrene residues in the culture medium was determined by measuring the optical density at a wavelength of 254 nm and 275 nm respectively15. Extraction was carried out in a separator funnel, by mixing for two minutes an aliquot of the culture medium with an equal volume of hexane. The resulting organic phase was then used for the spectrophotometric readings. In some cases the sample was diluted with hexane in order to bring it out within the range of the calibration line (0.01-0.07 mg/ml for naphthalene and 0.001-0.1 mg/ml for phenanthrene). For the determination of anthracene residue, aliquots of the culture medium were mixed for two minutes with an equal volume of ethyl acetate and the optical density of the resulting organic phase was measured at a wavelength of 254 nm using ethyl acetate as a blank. For preparation of standard curve of anthracene, a stock solution of 10 ppm in ethyl acetate was prepared and aliquots in the range of 0.2 to 1 ppm were separately measured at 254 nm16. Utilization of carbon source: All purified isolates were tested for growth on 0.01%, of either, naphthalene, phenanthrene, anthracene or phenol which were added as sole carbon sources to BH liquid medium. Sterilized BH medium containing the desired amount of hydrocarbon source was inoculated with the test strain and incubated in an orbital shaker at 200 rpm and 30oC for 72 h. Growth was tested by measuring the increase of OD600nm of the cultures. Effect of pH on the degradation of naphthalene, phenanthrene and anthracene: In order to determine the effect of pH on naphthalene, phenanthrene and anthracene degradation, 50 ml of BH broth cultures were first prepared at the following pH; 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11. After sterilization, 50 mg/l naphthalene, phenanthrene and anthracene was added to each flask, separately. 0.5 ml of Nutrient Broth overnight culture of bacterial strains (OD600 1.3-1.5) was added to each flask. The flasks were incubated at 30oC and 200 rpm for 72h. Bacterial growth was estimated using spectrophotometer at OD600nm of the cultures. Results and Discussion Isolation and selection of phenanthrene, naphthalene and anthracene biodegrading bacteria: Phenanthrene, naphthalene and anthracene degrading bacteria were isolated from water samples.   A range of bacterial colony types were observed on the different carbon source-containing plates, nine isolates were found to utilize phenanthrene, seven   grew on the naphthalene plates and eight isolates grew on anthracene amended media. Isolates Ph1, Ph2, Ph3, Ph4, Ph5 and Ph7 showed the ability to degrade phenanthrene as sole carbon sorce. The optical density (OD600)   for the bacterial isolates respective was was; 0.16, 0.512, 0.17, 0.482, 0.632 and 0.24. Isolates Ph6, Ph8 and Ph9 on the otherhand failed to utilize phenanthrene as sole carbon and energy source (Fig.1). Among the tested isolates only Ph5 isolate showed sustantial   growth rate on phenanthrene when compared with other tested isolates. According to the ioslates which showed no degrdation of the tetsed PAH, We assume that these isolates which did not degrade PAH may have lost this ability during preservation, or may have lost genes which control the utilization of this substrate; assumptions mirored in the work of   Zhao, et al., (2009)17, who reported that some phenanthrene degrading isolates lost their ability to degrade phenanthrene after a period of more than three weeks of preservation. Figure 1. Degradation of phenanthrene (20 mgl) by 9 bacterial isolates (named; Ph1-Ph9).       In studies using naphthalene, only two isolates Na6 and Na7 showed dehradation   with the latter being the best naphthalene degrader (Fig.2). The other isolates, Na1, Na2, Na3, Na4 and Na5, in contrast, failed to use naphthalene as a sole carbon and energy source. Regarding the anthracene-degarding isolates, five- An1, An2, An3, An4 and An7 degraded the substrate with ODs respectively oft: 0.174, 0.614, 0.551, 0.482 and 0.164 (Fig.3). Isolate,   An2 isolate was the msot active anthracene degrader,while isolates An5, An6 and An8 were unable   to use anthracene as a sole source carbon and energy source. Figure 2.   Degradation of naphthalene (20 mgl) by 7 bacterial isolates (named; Na1-Na7). Figure 3. Degradation of anthracene (20 mgl) by the bacterial isolates (named; An1-An8). Effect of pH on hydrocarbons degradation by the different bacterial isolates: The effect of pH (2.0, 3.0, 4.0,   up to 11.0) on PAH degradation by the isolated bacteria Ph5, Na7 and An2 was investigated in BH medium containing 50 mgl phenanthrene and 20 mgl naphthalene or anthracene respectively. In the case of phenanthrene, the optimum pH for bacterial growth and phenanthrene degradation was pH 7. At pH 6 and pH 8, bacterial growth and substrate degradation was markedly reduced (Fig.4). Shin et al.,(2008)18 reported that, relatively high mineralization rates of phenanthrene are found over a pH range of 6-8, with maximum mineralization rate occurring at pH 6 in a mineral salt medium. In the present study we found that the pH 7 is the optimum for obtaining a high mineralization rate of phenanthrene in BH medium; in agreement with Simarro, et al., (2011)19, our results confirm that the optimal pH value for the degradation of this substrate,   in BH medium, is pH7. Figure 4. The ability of the selected Ph5 isolate to degrade 50 mg/l phenanthrene at different pH. Growth and biodegradation depends on the type of PAHs used and the optimum pH range is very variable20. Some acid resistant Gram-positive bacteria, such as Mycobacterium sp., show better PAH degradation capabilities under acid conditions, largely because low pH seems to render such Mycobacteria more permeable to hydrophobic substrates21. However, other microorganisms belonging to Pseudomonas genus tend to prefer neutral pH conditions. In agreement with previous works19, our results confirm that neutral pH is optimum for the biodegradation of PAHs. Our results are also in agreement with Bisht, et al.(2010)22, who reported the ability of D. radiodurans SBA6 and B. circulans SBA12 to degrade naphthalene and anthracene over in the pH range of 5.0 to 11 (Fig.5). Othman et al.(2009)23 observed that changes in media pH can alter the electrical charge on various chemicals groups in enzymes molecules, thereby probably altering the enzymes ability to bind its substrate and catalyze a given rea ction. Imbalance of the electrical charges in very acidic and alkali conditions can also disrupt hydrogen bonds and other weak forces that maintain enzyme structure. Such disruption of enzyme structure is called denaturation, a phenomenon which leads to poor rates of biodegradation. Figure 5. Determination of the ability of Na7 and An2 isolate to degrade 20 mg/l naphthalene and anthracene respectively, over a range of pH. Utilization of different hydrocarbons by the same bacterium: Phenol (a single ring compound) was also included in this experiment as an example of a low molecular weight PAHs to provide a comparison with the high molecular weights hydrocarbons e.g. naphthalene (two rings), anthracene, and phenanthrene (both three compounds). Isolate Ph5 was shown to use phenol, naphthalene and anthracene as sole carbon and energy source (Fig.6). These results are slightly different from those reported by Zhao, et al. (2009)17, who reported that a bacterial isolate (ZP2) was able to degrade phenanthrene and naphthalene but failed to degrade anthracene as sole carbon source. Figure 6. Assimilation of 0.01% of naphthalene, anthracene and phenol as a sole   carbon source in Bushnell-Haas medium by Ph5 isolate. The same response was seen in the other two isolates Na7 and An2.   Isolate, Na7 rapidly mineralized phenol, phenanthrene and anthracene when added as sole carbon sources (Fig.7). Isolate An2 degraded phenol, naphthalene and phenanthrene as sole sources of energy (Fig.8). An isolate used in a study by Dean-Ross, et al. (2001)24 in contrasts was able to mineralize anthracene and phenanthrene but not naphthalene when grown under identical conditions. Figure 7. Utilization of 0.01% of phenanthrene, anthracene and phenol as a sole   carbon source in Bushnell-Haas medium by the isolate Na7. Figure 8. Consumption of 0.01% of phenanthrene, naphthalene and phenol as a sole   carbon source in Bushnell-Haas medium by An2 isolate. Phenanthrene, naphthalene and anthracene are the main components of crude oil and ubiquitous in contaminated water and soil. These carbon-sources could be utilized by a range of living in these polluted environments. Hydrocarbon mineralization occurs in a variety of ways depending on the species of bacterium isolated and it use of a preferred pathway. In this study, the wide range carbon-source utilization of tested isolates confirms their ability to use potentially different degradation pathways. Al-Thani, et al.(2009)25, similarly reported that the acclimation of a microbial community to one substrate frequently results in the simultaneous acclimation to some, but not all structurally related molecules. As a result, individual microbial species have the ability to act on several structurally similar substrates and therefore more easily act on their analogues following initial exposure26,27. Conclusion: In this investigation, we fascinated in determining if bacteria can be successfully used to bioremediate PAH pollution as a substitute to physical and chemical methods.In conclusion, some of our isolates grew well on the tested 4 low molecular weight organic aromatic compounds and as also reported28, individual bacterial strains could degrade several PAHs, but tended to prefer a single one and also we establish that the pH 7 is the optimum for obtaining a high mineralization rate of phenanthrene in BH medium. Acknowledgements Authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding the work through the research group project No. RGP-VPP-332. References 1Johnsen, A. R., Wick, L. Y. and Harms, H. 2005.Principles of microbial PAH-degradation in soil. Environ. Pollut. 133(1):71-84. 2Blumer, M. 1976. Polycyclic aromatic hydrocarbons in nature. Sci. Am. 234:35-45. 3Nnamchi, C. I., Obeta, J. A. N. and Ezeogu, L. I. 2006.Isolation and characterization of some polycyclic aromatic hydrocarbon degrading bacteria from Nsukka soils in Nigeria. Int. J. Environ. Sci.Tech. 3:181-190. 4Miller, E. C. and Miller, J. A. 1974.Biochemical mechanisms of chemical carcinogenesis. Edited by Busch, H. The Molecular Biology of Cancer, New York: Academic Press, pp.377-403. 5Autrup, H. 1990.Carcinogen metabolism in cultured human tissues and cells. Carcinogen. 11: 707-712. 6Klaasen, C. D. 2001. Casarett and Doulls Toxicology: The Basic Science of Poisons. New York: McGraw-Hill. pp.107-132. 7Piskonen, R. and Itavaara, M. 2004. Evaluation of Chemical Pretreatment of Contaminated Soil for Improved PAH Bioremediation. Appl. Microbiol. Biotechnol. 65: 627-634. 8Leahy, J.G. and Colwell, R.R. 1990. Microbial Degradation of Hydrocarbons in the Environ. Microbiol. Rev. 54: 305-315. 9Ward, W., Singh, A. and Van Hamme, J. 2003.Accelerated biodegradation of petroleum hydrocarbon waste. J. Ind. Microbiol. Biotechnol. 30: 260-270. 10Phillips, T.M., Liu, D., Seech, A.G., Lee, H and Trevors, J.T. 2000. Monitoring bioremediation in creosote contaminated soils using chemical analysis and toxicity tests. J. Ind. Microbiol. Biotechnol. 24: 132-139. 11Churchill, S. A., Harper, J. P. and Churchill, P. F. 1999. Isolation and characterization of a Mycobacterium species capable of degrading three-and four ring aromatic and aliphatic hydrocarbons. Appl. Environ. Microbiol. 65:549-52. 12Weissenfels, W. D., Beyer, M., Klein, J. and Rehm H. J. 1991. Microbial metabolism of fluoranthene: isolation and identification of ring fission products. Appl. Microbiol. 34:528-535. 13Supaka, N., Pinphanichakarn, P., Pattaragulwanit, K., Thaniyavarn, S., Omori, T. and Juntongjin, K.2001. Isolation and characterization of a phenanthrene- degrading Sphingomonas sp. strain P2 and its ability to degrade fluoranthene and pyrene via cometabolism. Sci. Asia. 27: 21-28. 14Lee, S. and Cutright, T. J. 1996. Nutrient medium for the bioremediation of polycyclic aromatic hydrocarbon contaminated soil. US Patent. 5, 508, 194. 15Marta, I., Alquati, C., Morgia, P., Mansi, A., Scotti, R., Nicolini, L. and Papacchini, M. 2006.Contaminated sites: assessment of the metabolism, growth and genetic characterization of wild-type microbial strains able to degrade naphthalene. Prevention Today. 2: 35-50. 16Kumar, G., Singla, R. and Kumar, R. 2010. Plasmid associated anthracene degradation by Pseudomonas sp. isolated from filling station site. Natur. and Sci. 8: 89-94. 17Zhao, H. P., Wu, Q. S., Wang, L., Zhao, X. T. and Gao, H. W. 2009. Degradation of phenanthrene by bacterial strain isolated from soil in oil refinery fields in Shanghai, China. J. Hazard. Mater. 164: 863-869. 18Shin, K., Kim, J. and Kim, K. 2008.Effect of biosurfactant addition on the biodegradation of phenanthrene in soil-water system. Environ. Eng. Res. 13: 8-13. 19Simarro, R., Gonzalez, N., Bautista, L. F., Sanz, R. and Molina, M. C. 2011. Optimization of key abiotic factors of PAH (naphthalene, phenanthrene and anthracene) biodegradation process by a bacterial consortium. Water Air Soil Pollut. 217: 365-374. 20Dibble, J.R. and Bartha, R. 1979.Effect of environmental parameters on the biodegradation of oil sludge. Appl. Environ. Microbiol. 37: 729-739. 21Kim, Y.H., Freeman, J.P., Moody, J.D., Engesse, K.H. and Cerniglia, C.E. 2005.Effects of pH on the degradation of phenanthrene and pyrene by Mycobacterium vanbaalenii PYR-1. Appl. Environ. Microbiol. 67: 275-285. 22Bisht, S., Pandey, P., Sood, A., Sharma, S. and Bisht, N. S. 2010.Biodegradation of naphthalene and anthracene by chemo-tactically active rhizobacteria of Populus deltoides. Braz. J. Microbiol. 41: 922-930. 23Othman, N., Hussain, N.H., Abd Karim, A.T. and Abdul-Talib, S. 2009.Isolation and optimization of napthalene degradative bacteria. International Conference on Sustainable Infrastructure and Built Environment in Developing Countries. Bandung, West Java, Indonesia.101-105. 24Dean-Ross, D., Moody, J. D., Freeman, J. P., Doerge, D. R. and Cerniglia, C. E. 2001.Metabolism of anthracene by Rhodococcus species. FEMS Microbiol. Lett. 204: 205-211. 25Al-Thani, R.F., Abd-El-Haleem, D.A.M. and Al-Shammri, M. 2009.Isolation and characterization of polyaromatic hydrocarbons-degrading bacteria from different Qatari soils. African J. of Microbiol. Resear. 3: 761-766. 26Bauer, J. and Capone, D. 1985. Degradation and mineralization of the polycyclic aromatic hydrocarbons anthracene and naphthalene in inter tidal marine sediments. Appl. Environ. Microbiol. 50: 81-90. 27Mitchell, J. and Cain, R. 1996. Rapid onset of the accelerated degradation of dicarboximide. Pesticides Sci. 48: 1-11. 28Tadros, M. G. and Hughes, J. B. 1997. Degradation of polycyclic hydrocarbons (PAHs) by indigenous mixed and pure cultures isolated from coastal sediments. Appl. Biochem. Biotechnol. 63(65): 865-870 Can Liberty and Equality be Reconciled in Political Theory? Can Liberty and Equality be Reconciled in Political Theory? The word reconcile means that, to find a way in which two situations or beliefs that are opposed to each other can agree and exist together. It is sometimes difficult to reconcile for instance science and religion. When two people are reconciled they become friendly again after they have argued, (Cambridge advanced learners dictionary). In this essay I will dwell much on whether liberty and equality can be reconciled by defining these concepts. Liberty and freedom are often used interchangeably, however they essentially mean the ability to think or act as one wishes. Gerald McCallum: â€Å"Freedom is always of something (an agent or agents) to do or not to do, become or not become something†. Most political theorists assume that people ought to be free unless there are compelling reasons for restricting their freedom. For instance J.S.Mill believes that, to be human is to enjoy a sphere of in which one is able to think, express ideas and lead a lifestyle of one’s own choosing. He went on to say, â€Å"even if a person finds himself in an opinion, he should be free to express that opinion† and â€Å"if all mankind, minus one, were of one opinion, and only one person were of the contrary opinion, mankind would not be justified to silence that person, than he, if he had the power, would be justified in silencing mankind† By allowing individuals to be free, society can progress, hence the ideas of mi nimal government and protection of human rights and freedoms. There are two concepts of liberty, these includes negative and positive liberty (Isaiah Berlin, 958). Negative liberty involves response to the question: what is the area within which the subject a person or group of persons is or should be left to do what he is able to do or be, without interference by other people. It implies freedom of choice, therefore, Law and Government should only serve to enlarge and not restrict freedoms, and privacy of the individual must be respected by recognizing a clear distinction between what is public and what is private and finally it advocates individual rationality as the basis for choice. On the other hand, positive liberty is involved in the answer to the question: what or who is the source of control or interference that can determine someone to do or be, also interested in the question ‘By whom am I governed?’ However, as opposed to â€Å"How much am I governed? G.C. Mc Callum, (1972). According to T.H. Green it means personal gr owth and self-development. Liberalism is one of the dominant political ideologies of the contemporary world that favors liberty in terms of equality. It is founded on the traditional notions of individualism: this reflects the belief in the supreme importance of the human individual as opposed to any social group or collective body. The liberal goal is therefore to create a society within which individuals can flourish and prosper with everyone pursing what they consider as good in any way they choose to define it. Therefore, individual freedoms or liberties are given priority over notions of equality, justice and authority. It is thus based on the presumption that freedom is a good thing and that any limitations of the same should be justified. It is strongly against limitation on freedom of individuals to pursue self interest. It however, favors private property and free enterprise, for instance freedom to buy and sell anything. And finally it is against state control and seconds that role of the state limit ed to maintaining law and order, in this respect, it should provide defense and oversee enforcement of contracts. Equality refers to the belief that human beings are born having equal rights. The Declaration of Independence asserts some of these rights to be life, liberty and the pursuit of happiness. Equality is not about blanket uniformity but rather to establish the legal, political or social conditions in which people will be able to enjoy equally worthwhile and satisfying lives. The principle of equality sometimes contains the assertion that people must have equal access to wealth and property in order for them to more fully realize the principle of equality. According to Oxford English Dictionary, equality implies the condition of having equal dignity, rank or privilege with others, the condition of being equal in power, ability, achievement of excellence, fairness, impartiality, due proportion, and proportionateness. Therefore, this term is defined in the light of equal conditions guaranteed to each for making the best of him. In the words of Barker, it implies that â€Å"whatever conditions are guaranteed to me in the form of rights, shall also, and in the same measure, be guaranteed to others and that whatever rights are given to others shall also be given to me†. So says Laski: undoubtedly, it implies fundamentally a leveling process. It means that no man shall be so placed in society that he can over-reach his neighbor to the extent which constitutes a denial of the latter’s citizenship†, J.J. Rousseau [(1762) 1969]. There are two forms of equality positive and negative. Positive form implies the adequate provision of opportunities for all. Here, the term ‘adequate opportunities’ does not mean ‘equal opportunities’. Since people differ in their needs and capacities and also in their efforts, they need different opportunities for their individual self-development, Friedrich Hayek and Keith Joseph (1979). Negative equality implies the absence of undue privileges. That is to say there should be no artificial grounds of discrimination, such as of religion, color, race, caste, wealth, sex, and many more. The underlying principle being that no talent should suffer from frustration for want of encouragement. It is still a challenge to provide a coherent defense of equality. This however requires separating out the various principles, and explaining what it is that is being equalized or equality is in danger of degenerating into a mere political slogan unless it is possible to a nswer the question ‘equality of what’?: is it income, or well being, the capacity to acquire certain goods, or something else? Socialism is also one of the dominant ideologies of the modern world that favors equality than liberty. Socialists believe in a Common Ownership: this relates to the ownership of property in the community as opposed to individual ownership. The argument here is that by placing property in joint community ownership, the common good is promoted rather than the good of individuals. To them a positive view of freedom must be examined in a social context and therefore in the context of resources of a material kind. The right to read and write, for example, requires the provision of schooling if such a right is to be meaningful. In the Socialist World Order all classes and private property are abolished. The means of production for instance, that is all land, machinery, factories and other productive resources must be under the democratic control of the people. Wage labor is unknown. All worked for the collective good and products are distributed according to the principle of â€Å"From all according to their ability to all according to their need. They however, call this a good society. Liberty and Equality are political concepts that strongly oppose each other, to be specific; between them there is what we call war of principles. For instance, Libertarians believes that Libertaria is the place where humankind should seek its future. This is because it is a society where people are truly free. They have the economic freedom to pursue their own ends in a market society. Indeed Libertaria is run exclusively on market lines. They do not believe in the good society as such, as market choices constantly fluctuate. Individuals must choose their own good life and the market is where they make their key decisions. On the other hand, Egalitarians believes that Egalitaria is the ideal place to which humankind should commit itself. It is the benchmark by which other societies can measure whether they are serving the aims which any good society should fulfill. Individuals believe that market decisions produce what people want. In Libertaria all make market choices and all receive from the market that which is their due. They are free from both the stifling collectivity of Communitarian and from the fear of having to make sacrifices, a fear which haunts Utilitarian. While Egalitaria would be the good society because it would be one in which all citizens are treated as being of equal worth. It would have basic political liberties, equality of opportunity and the rule of law, all of which are constitutionally guaranteed. It would also be dedicated to ensuring that these basic rights are of equal worth to their possessors (Lukes, 1993: 34). Libertaria has freedom of speech, of movement, of thought and of association. The rule of law prevails and there is no torture. They have a minimal state which oversees the system of free exchange, the courts, contractual disputes, the armed forces and the police. They realize that the state can build up its own interests which can conflict with those of private individuals. They therefore, keep its role to an absolute minimum. Freedom is their watchword and freedom to choose is prized above all else. On the other hand, the citizens of Egalitaria would be filled with a basic abhorrence of injustice and would strive to overcome any involuntary disadvantage whether such disadvantages are the result of religion, class, gender, ethnicity or whatever. Egalitaria would not tolerate the gross inequalities which characterize some of the communities within Communitarian. Rights in Egalitaria would be universal, not subject to the dictates of history, culture and tradition. Considering the above argument it seems like each ideology is giving no space to the enjoyment of the other ideology, or in simple terms we can say that it is hard for liberty and equality to go together, however, in practice these terms are mutually reinforcing each other. It is also very hard to find a society that is purely libertarian or that is purely Egalitarian, this means that in libertarian the possibility of finding some element of equality is there, same applies to the egalitarian, there are some sort of liberties though to the slightest degree. Therefore, there are some instances where liberty and equality move together with a common goal for instance the promotion of welfare of the people. It is also of great important that liberty and equality should work hand in hand, just because they act as watch dog to each other, for instance, the relationship that is between them is that like of three arms of government executive, parliamentary and judiciary. The problem with establishing the realm of liberty is that there are a bewildering number of grounds upon which freedom can be upheld. In much liberal political thought freedom is closely related to the notion of rights. However, as many political theorists employ a value-free or social-scientific understanding of such terms, they are quite prepared to accept that certain freedoms such as the freedom to murder should be constrained. In that sense, liberty or license distinction merely begs the question: which freedoms are we willing to approve, and which ones are we justified in curtailing? Alternative means of distinguishing between liberty and license was proposed by J.S. Mill. As libertarian who believed that individual freedom was the basis of moral self-development, Mill proposed that individuals should enjoy the greatest possible realm of liberty. However, Mill also recognized that unrestrained liberty could become oppressive, objectionable, morally corrupt and even tyrannical. In on Liberty (1859) 1972) Mill proposed a clear distinction between self-regarding actions and other-regarding actions, suggesting that each individual should exercise sovereign control over his or her own body or life. The only justification for constraining the individual, Mill argued, was in the event of ‘harm’ being done to others. Mill emphasizes that liberty becomes license not only when the rights of another are violated, or when harm is done to others, but when liberty is unequally shared out. In this sense equality is seen as standing block to the existence of license . Equality is a multi-dimensional concept. Diverse opinions are put forth in locating the exact relationship between these two concepts. Writers like De Tocqueville and Lord Acton hold the view that liberty and equality are opposed to each other as they are antagonistic. The desire to have equality destroys the possibility of having full liberty. Achievement of equality demands positive state action. Equality needs a positive state and liberty needs a Negative State. The Elite theory of Democracy is against the principle of equality. But on the other hand writers like Maitland, Rousseau, Barker, Laski and others, hold the view that they are complementary to each other, in the sense that they both play an important part in human life, fulfilling separate but complementary. Since the principles of liberty and equality are ideals capable of being mutually realizable, one answer to the continuing debate regarding each principles precedence would be the check of each principle on the excesses of the other. A just society might hold itself to the standard that, while difficult to reconcile, it is still most desirable to strive to strike a balance between upholding the belief in the inherent equality of all individuals, and the protecting the right to liberty for all its members. L. T. Hothouse opined that liberty without equality is a high-sounding phrase with squalid results. Liberty lies in equality. Liberty without equality degenerates into license and equality without liberty lapses into uniformity. To Prof. Barker Equality in all its forms, must always be subject and instrumental to the free development of capacity; but if it be pressed to the length of uniformity; if uniformity be made to thwart the free development of capacity, the subject becomes th e master, and the world is turned topsy-turvy. Liberty unites men but equality criticizes the social hierarchy and contributes towards the stability of the community ((1931) 1969) R.H. Tawney. Therefore liberty would be hollow without some measure of equality and equality would be meaningless without liberty. In this age of democracy where voting is a powerful weapon in the hands of the electorate economic equality is most essential condition because the economically powerful person will use his economic resources to gain political power. Political equality will be a mockery in the absence of economic equality. As per above argument it is hard to say that liberty and equality can be reconciled or not, in the sense that these terms are supported by different ideologies but which are reinforcing each other. So to say that they can be reconciled is forgetting that the terms are founded on different ideologies and on the same point to say that they cannot be reconciled is also forgetting that these terms are mutually reinforcing each other, hence making this question very contested one. Who determine that excessive use of liberties leads into license? What yard stick do they use to determine harm to others? And what is harm? It is good to know that what is harm to me cannot be harm to others and vice-versa. For instance, a society that is comprised of well-off and worse-off, come together and agree that they should be following the principle of â€Å"to each according to ability† can another man from a distance society come and say that the well-off in this particular society are harming the worse-off? This cannot be possible since what he calls it harm cannot be harm to others. In this case the worse-off choose to do what they can manage to, according to the level of their economic status, therefore, it is not harm to them, because they have decided to follow it based on their will and rationality. And again, who determine that excessive use of equality leads to uniformity? What is uniformity? What yard stick do they use to measure uniformity? In every time we talk of equality we must also note that there are some forms of inequality. What is equality to a particular society cannot be equality to the other, since society perceives things in different way all together. The issue of inequality will not come to an end since they were there before, they are here today and possibly they will be there tomorrow. What a just society would do is to come up with measures or initiative to overcome them. For instance legitimate inequality, affirmative action and positive discrimination where the society comprised of well-off and worse-off come to a consensus that they should accept the status of inequality and that they will be following a principle of â€Å"to each according to needy†, but the end result should be greater to the worse-off so that they should little by little cover the gap that is there between them. On the other hand this makes sure that talents, skills and ability are not hindered. Therefore, one cannot come and say, this is uniformity since what is uniformity to him cannot be uniformity to others. It is good to reflect on these questions and acknowledge that what is liberty or equality to the state cannot be liberty or equality to individuals or the collectives group and vice-versa. What was liberty or equality yesterday cannot be liberty or equality today. These things keeps on changing based on circumstances that people as a nation are going through. Therefore, liberty and equality are continuously changing depending on time and who uses them. Finally, based on argument above its very tricky and challenging to say that liberty and equality can be reconciled or not. However, beauty lies in the hands of the beholder; even though, there are no general examples that can be sighted to show that liberty and equality can be reconciled, but there is a room for reconciliation since they are complementary. Therefore, liberty and equality have a common end, the promotion of the value of the personality and the free development of its capacities. No one of these can be enjoyed in isolation. Bibliography Heywood, A. (2004). Introduction to Political Theory. In A. Heywood, Introduction to Political Theory (p. 252 and 284). china: Palgrave Mc Millan. J.C, J. (2004). Principle of modern politcal science. In J. Johari, Principle of modern politcal science (p. 200). New Dehli: Sterling. Hoffman J. and Graham P (2009) introduction to Political Theory. Professor Wizeman Chijere Chirwa, Dr. Fidelis Edge Kanyongolo and Dr. Edrinnie Kayambazithu. (2004). Building an informed Nation. In Building an informed Nation (p. 58). Lilongwe: Democracy Consolidation Programme.

Origin And Applications Of Formwork Construction Essay

Origin And Applications Of Formwork Construction Essay Formwork is the term given to either temporary or permanent moulds into which concrete or similar materials are poured. In the context of concrete construction, the false work supports the shuttering moulds. Most of the buildings which are made to stand for a long time are made of concrete and mortar. These building materials are strongest and most suitable but at the same time they are a bit tedious to deal with. They do not acquire the desired shape and need help of some sort of support or any frame which can be detached as the concrete solidifies. Actually concrete is a material without any shape. For most applications the shape matters, and concrete has to be molded or formed. ORIGIN Concrete has been in use for the thousands of years. The dome of Pantheon in Rome is made of lightweight concrete, and the under face shows the moulding effect of formwork used two millennia ago. But it was only at the end of nineteenth century that the use of concrete became common, with the invention of reinforced concrete. Some of the earliest examples of concrete slabs were built by roman engineers. Because concrete is quite strong in resisting compressive loads, but has relatively poor Tensile strength, these early structures consisted of arches, vaults and domes. To mold these structures, temporary scaffolding and formwork built in the future shape of the structure. These building techniques were not isolated to pouring concrete, but were and are widely used in Masonry. Because of the complexity and the limited production capacity of the building material, concretes rise as a favored building material did not occur until the invention of Portland cement and reinforced concrete. Pantheon Dome SIGNIFICANCE The construction industry forms the largest single sector in any economy. In the USA for example the construction sector is responsible for 14% of the GDP (US National Statistics Bureau). Formwork is the single largest cost component of concrete buildings structural frame. The cost of formwork exceeds the cost of concrete or steel and in some situations the formwork costs more than the concrete and steel combined. For some structures, placing priority on the formwork design for a project can reduce the total frame cost by as much as 25%. This saving includes both direct and indirect costs. Formwork efficiencies accelerate the construction schedule, which can result in reduced interest costs during construction and early occupancy for the structure. Other benefits of formwork efficiency include increased job site productivity, improved safety, and reduced potential for error. Concrete is a material without shape. For most applications the shape maters and the concrete has to be molded or formed. Formwork is one of the integral parts of construction industry. This is the basic of any architectural structures on which the whole building is made. The formwork is basically used to hold the whole structure until the whole building is capable to stand on its own. Even we use some solid iron rods in buildings but the concrete need some time to bind with that for a firm structure to stand as and in the desired shape. CLASSIFICATION OF FORMWORKS Under this section of the study we will get in depth of four aspects of each and every type of the form work. These four aspects would be: Analysis of various components of formwork. Safety aspects of formwork. Economy aspects of formwork. Selection process of the material of formwork. The formworks are broadly divided in four categories based on the material, of which it is made. This categorization is as follows: Timber Formwork. Metal Formwork. Plastic Formwork. Fiber Formwork. TIMBER FORMWORK This is the oldest kind and most basic formwork used in the construction industry. Its moisture resistant property makes it utilizable in this industry. Though it is easy to manufacture the timber formwork but it is time consuming when formwork is to be prepared for big structures. It is relatively cheap and easy to shape as required. It is relatively light in weight for handling, but it is of limited durability. ANALYSIS OF VARIOUS COMPONENTS: Sheathing is supported by horizontal members called joists or runners. Joists are made from dimension lumber spaced at constant intervals that are a function of applied loads and type of lumber. It is a recommended practice to round down the calculated joist spacing to the lower modular value. Joists are supported by another set of horizontal members perpendicular to the joists, called stringers. The stringers are supported by the vertical members called shores. In all wood conventional formwork [ i.e. 4 4 in. or 6 6 in.]. Shores are rested on heavy timbers called mudsills, to transfer the vertical loads to ground. In case where a slab on grade exits, shores are directly rested on them. Once the bottom of the beam is constructed and leveled, one side of the beam is erected first with the holes drilled in it for installing the tie roads. Tie rods are steel rods that hold the two sides of beam together. After the first side of beam form is erected, the reinforcement is placed inside the beam and then the other side of the beam is erected. Tie rods are then inserted into all holes on both side of the beam. The tie rods function is to resist horizontal pressure resulting from the freshly put concrete and thus keep the sides of the beams in their proper location. SAFETY ASPECTS FOR TIMBER FORMWORK: Though Timber formwork is the basic formwork but it has some drawbacks relating to the safety which prove to be harmful for the structure to be build and the laborers. The following safety aspects must be considered while dealing with the Timber Formwork. Care should be taken in presence of Moisture: The biggest disadvantage of Timber Formwork is that the timber get softens when it is wet. If the moist is too much then timber soften up to a extent that it can be poked with the help of nail tip. Though dry timber is hard enough to bear the stress developed by concrete but it is not the same when it get wet. When timber comes in contact with moisture, the methanol molecules get activated and are responsible for weak intermolecular bond and thus softening. This problem is commonly known as Wet Rot. Care should be taken in presence of mini organisms and micro organisms: Biggest threats to any wooden structure and article are Termite and Fungus. Both of these organisms live on almost every type of wood as parasite and cause damage to huge quantity of wood. As far as Timber formwork is considered the damage occurs mainly in damp and dark regions of storage. Termites eat the wood from the inner side making it hollow and weak within. The wood thus left is so weak that it can be broken with bare hands. The damage caused by fungus is known as Dry Rot. Dry-rot fungus is often thought of as a building cancer, rampaging through buildings and rapidly destroying any timber in its path. The fungus, which thrives in moist unventilated conditions, will penetrate brickwork to get to more timber and can cause widespread destruction of structural timbers, skirting boards and door frames, and wood flooring. In short, the fungus can be thought of as living in masonry and eating wood, and because t he fungus thrives in damp, unventilated conditions, it can occur in the areas of a property that are not often seen, such as floor voids, or behind timber paneling, so damage may be extensive before the attack is discovered. Fire Safety: We already know that wood is flammable and porn to fire if considerable precautions are not taken specially for those constructions sites which are near by to a gas station or any such location. Fires on construction sites have, for many years, been recognized as a serious problem for construction companies and insurers, but less of a public safety issue since there are relatively few fire deaths in such incidents. However, the trend for ever-taller buildings, particularly in the Gulf and Far East, has resulted in a number of significant fires during construction which have caused deaths and demonstrated the difficulties facing fire brigades when tackling such incidents. On several occasions, helicopters have had to be used for fire suppression and rescue. Insurers have long had concerns about the potential for loss on tall building projects, and these fires have demonstrated that their concerns are well founded. Causes can involve electrical risks, hot work, smoking, rubbish burning, overheating equipment and escapes of gases or flammable liquids all of which are well recognized and should be amenable to normal fire safety measures. DIFFERENT TYPES OF TIMBER FORMWORK Plywood: plywood has some strength in both directions, but because the outer veneers give greater strength in the direction of their grain, the sheet should always span that way. Plywood is a few millimeters thick used as lining material, which is fully supported from behind. With thickness of 12-19 mm the strength of plywood itself can be used, and the framing members spaced out the economical distances. There are three main types of poly wood: Finnish Birch American Softwood Tropical Hardwood Sheets are normally 8ft by 4ft except for Finnish Birch, the outer grain runs in the length of the board. The first two types are produced to appropriate national standards. Hardwood ply comes from a variety of tropical countries so obtaining reliable data about them is difficult. Block board: Stripes of timber are made into a panel with veneers on both sides. The glue should be of high quality else the surface may not be flat enough as the stripes tend to show through. Block board is made up of a core of softwood strips. These strips may be up to about 25mm wide. The strips are placed edge to edge and sandwiched between veneers of hardwood. The sandwich is then glued under high pressure. Block board is not suitable for outdoor use because the glues used are interior glues. It is important to ensure that the core runs lengthways in order to achieve maximum strength. The core can be joined by hands or by machine. There are only few small core gaps or even no core gaps in machine-made core. But core gaps are common in man-made cores. Machine-made core is much better than man-made core. Block board is sold in sheets of 2440 x 1220mm and are normally 30mm thick. Screws and nails may be used to attach block board but you have to ensure that you make contact with th e strips of softwood and not the gaps between the softwood strips. Chipboard: Small chippings are pressed into sheets. As with all boards depending significantly on plastic as the matrix, the stiffness is poor, and a greater thickness than plywood is frequently needed. It is heavier than plywood but give better finish. Gluing together wood particles with an adhesive, under heat and pressure makes chipboard. This creates a rigid board with a relatively smooth surface. Chipboard is available in a number of densities: -normal, medium and high-density. METAL FORMWORK This kind of Formwork is the most suitable formwork for high rise buildings. This system is eco friendly and proves to be more economical on long run due to good durability. In the conventional metal system, joists and stringers are made of aluminum or steel supported by scaffold-type aluminum or steel shoring. In todays construction practices, joists and stringers are made of aluminum and are supported by scaffold-type movable shoring system. This formwork is built out of prefabricated modules with a metal frame (usually steel or aluminum) and covered on the application side with material having the wanted surface structure (steel, aluminum, timber, etc.). ANALYSIS OF VARIOUS COMPONENTS: In this system, steel joists and stringers have the advantage of supporting greater spans and fewer joists and stringers. The main problem with using steel as joists and stringers for forming concrete slabs is their heavy weight, which makes it difficult for one person to handle. A standard steel W-section is used because its wide flange makes it easy to connect stringers with shore legs. A composite action open-web steel joist, supporting beams and girders, and reinforced concrete slab interconnection. Upper apex portions of the steel joist webbing protrude through the upper chord members of the joist and through apertures provided in the sheet metal formwork placed over such joists prior to the pouring of the concrete slab. The improvement relates to a continuous round rod secured near the apex of each projecting web member parallel to the longitudinal axis of the joist and a reinforcing wire mesh draped between said rods, thus permitting greater spacing between said joists, whereb y said protruding apex portions, said rods and said draped wire mesh will be encased within the slab to act as shear interconnection and reinforcement devices therein, to secure the joist and formwork together, to enhance the locking of the concrete slab to the protruding joist apex portions, and to the supporting beams through the joist end connection welded to the beam or girder, and to reinforce said concrete slab. This improvement makes optional the use of wedge members forced between such protruding joist apex portions. SAFETY ASPECTS OF METAL FORMWORK Though there is no need worry for any fungal or organic decay to the metal formwork but still there are same issues which must be paid attention to, relating to corrosion and careless handling. Now lets discuss these issues one by one. Corrosion: the corrosion problem may occur to any formwork if it is not maintained in proper way. Any part of formwork may be corroded due to direct contact with moisture. This direct contact is either because of lack of proper oiling techniques or due to standing water. If even an inch or even a centimeter is left out of oiling then it proves to be dangerous for the formwork. Many times it happens that water is leaked out and left standing. This tends to corrode the dipped part of formwork. Rusting of formwork also leave stains over the concrete unit. These stains if thick, crystallize later and pose a threat to plater layer. Mishandling while assembling: There have been several cases causing accidents of laborers at the site due to mishandling of the formwork. These accidents occur while lifting, if the load is not properly tied or hydraulic jack is not applied properly. Other reason responsible for on site accidents is loose screws and bolts which lead to collapsing of the erected formwork. Electricity: If the site location is nearby any sort of electric network then the metal formwork should be handled with utmost care. A safe distance should be maintained and if possible any such network or device should be avoided in nearby vicinity of the site. DIFFERENT TYPES OF METAL FORMWORK Extruded Aluminum Joist: The first component of the conventional metal system is the aluminum joist. The extruded aluminum joist takes the shape of a modified beam with a formed channel in the top flange in which a wood nail strip 2 by 3 in. is inserted. Tha plywood deck is then nailed to the nail strip. Aluminum Beams (Stringers):The purpose of stringers is to transfer the loads of the surface panel to scaffold. Extruded aluminum joists can also be used as stringers unless the loading is too excessive, in fact it is good practice to avoid using a mixture different beam types. Aluminum beams are commercially available for the lengths ranging from 4 to 30 ft. Aluminum Scaffolding Shoring: The aluminum scaffolding shoring system has been available for several years as a substitute for the steel scaffolding shoring system. The system consists of several frames connected together by cross bracing. Aluminum shoring is lighter and has load carrying capacity equal to or greater than steel shoring. Load carrying capacity of aluminum shoring can reach up to 36,000 lb. Fig 10 Aluminum Scaffolding Shoring Post share: A Post Shore is a single member made of steel or aluminum and support stringers. Post shores can be used to replace, or in combination with, scaffold shoring. Post shores can also be used re-shoring after striping of formwork elements. ECONOMY OF FORMWORK The concrete subcontractor must achieve 3 goals in his formwork workmanship: Quality formwork must be designed and built so that the resulting cast concrete attains the desired size, shape, position and finish. Safety formwork must be designed built strong enough to support all dead and live loads without blowouts, collapse, danger to workers, and risk of damage to the structure. Economy formwork must be designed, built and re-used in an effort to save time and money for the general contractor and the owner. Now as far as the economical aspect of formwork is concerned let me make you aware of the fact that formwork share a considerable site budget. If we design the formwork intelligently and plan its use, then we can save a lot of money. As metal formwork is more durable and reusable as compared to the wooden formwork, it should be used. There are several advantages which make metal formwork a better option.