Importance of television in our life Essay Example for Free

Importance of television in our life Essay Natural rubber, also called India rubber or caoutchouc, as initially produced, consists of suitable polymers of the organic compound isoprene, with minor impurities of other organic compounds plus water. Forms of polyisoprene that are useful as natural rubbers are classified aselastomers. Currently, rubber is harvested mainly in the form of the latex from certain trees. The latex is a sticky, milky colloid drawn off by making incisions into the bark and collecting the fluid in vessels in a process called tapping. The latex then is refined into rubber ready for commercial processing. Natural rubber is used extensively in many applications and products, either alone or in combination with other materials. In most of its useful forms, it has a large stretch ratio, high resilience, and is extremely waterproof.[1] Varieties[edit] The major commercial source of natural rubber latex is the Parà ¡ rubber tree (Hevea brasiliensis), a member of the spurge family, Euphorbiaceae. This species is widely used because it grows well under cultivation and a properly managed tree responds to wounding by producing more latex for several years. Many other plants produce forms of latex rich in isoprene polymers, though not all produce usable forms of polymer as easily as the Parà ¡ rubber tree does; some of them require more elaborate processing to produce anything like usable rubber, and most are more difficult to tap. Some produce other desirable materials, for example gutta-percha (Palaquium gutta)[2] and chicle from Manilkara species. Others that have been commercially exploited, or at least have shown promise as sources of rubber, include the rubber fig (Ficus elastica), Panama rubber tree (Castilla elastica), various spurges (Euphorbia spp.), lettuce (Lactuca species), the related Scorzonera tau-saghyz, various Taraxacum species, including common dandelion (Taraxacum officinale) and Russian dandelion (Taraxacum kok-saghyz), and guayule (Parthenium argentatum). The term gum rubber is sometimes applied to the tree-obtained version of natural rubber in order to distinguish it from the synthetic version.[1] Discovery of commercial potential[edit] The Para rubber tree is indigenous to South America. Charles Marie de La Condamine is credited with introducing samples of rubber to the Acadà ©mie Royale des Sciences of France in 1736.[3] In 1751, he presented a paper by Franà §ois Fresneau to the Acadà ©mie (eventually published in 1755) which described many of the properties of rubber. This has been referred to as the first scientific paper on rubber.[3] In England, Joseph Priestley, in 1770, observed that a piece of the material was extremely good for rubbing off pencil marks on paper, hence the name rubber. Later, it slowly made its way around England. South America remained the main source of the limited amounts of latex rubber used during much of the 19th century. In 1876, Henry Wickham gathered thousands of Para rubber tree seeds from Brazil, and these were germinated in Kew Gardens, England. The seedlings were then sent to India, Ceylon (Sri Lanka), Indonesia, Singapore, and British Malaya. Malaya (now Malaysia) was later to become the biggest producer of rubber. In the early 1900s, the Congo Free State in Africa was also a significant source of natural rubber latex, mostly gathered by forced labor. Liberia and Nigeria also started production of rubber. In India, commercial cultivation of natural rubber was introduced by the British planters, although the experimental efforts to grow rubber on a commercial scale in India were initiated as early as 1873 at the Botanical Gardens, Calcutta. The first commercial Hevea plantations in India were established at Thattekadu in Kerala in 1902. In Singapore and Malaya, commercial production of rubber was heavily promoted by Sir Henry Nicholas Ridley, who served as the first Scientific Director of the Singapore Botanic Gardens from 1888 to 1911. He distributed rubber seeds to many planters and developed the first technique for tapping trees for latex without causing serious harm to the tree.[4]Because of his very fervent promotion of this crop, he is popularly remembered by the nickname Mad Ridley.[5] Properties[edit] Rubber latex Rubber exhibits unique physical and chemical properties. Rubbers stress-strain behavior exhibits the Mullins effect and the Payne effect, and is often modeled as hyperelastic. Rubber strain crystallizes. Owing to the presence of a double bond in each repeat unit, natural rubber is susceptible to vulcanisation and sensitive to ozone cracking. The two main solvents for rubber are turpentine and naphtha (petroleum). The former has been in use since 1764 when Franà §ois Fresnau made the discovery. Giovanni Fabbroni is credited with the discovery of naphtha as a rubber solvent in 1779. Because rubber does not dissolve easily, the material is finely divided by shredding prior to its immersion. An ammonia solution can be used to prevent the coagulation of raw latex while it is being transported from its collection site. Elasticity[edit] In most elastic materials, such as metals used in springs, the elastic behavior is caused by bond distortions. When force is applied, bond lengths deviate from the (minimum energy) equilibrium and strain energy is stored electrostatically. Rubber is often assumed to behave in the same way, but this is a poor description. Rubber is a curious material because, unlike in metals, strain energy is stored thermally. In its relaxed state, rubber consists of long, coiled-up chains. When rubber is stretched, the chains are taut. Their kinetic energy is released as heat. The entropy and temperature increases during elongation but decreases during relaxation. This change in entropy is related to the changes in degrees of freedom. Relaxation of a stretched rubber band is thus driven by a decrease in entropy and temperature, and the force experienced is a result of the cooling of the material being converted to potential energy. Rubber relaxation isendothermic, and for this reason the force exerted by a stretched piece of rubber increases with temperature. The material undergoes adiabatic cooling during contraction. This property of rubber can easily be verified by holding a stretched rubber band to ones lips and relaxing it. Stretching of a rubber band is in some ways opposite to compression(although both undergo higher levels of thermal energy of an ideal gas), and relaxation is opposed to gas expansion (Note: rubber bands last longer in the cold). A compressed and heated gas also exhibits elastic properties, for instance inside an inflated car tire. The fact that stretching is equivalent to compression is counterintuitive, but it makes sense if rubber is viewed as a one-dimensional gas, plus it is attached to other molecules. Stretching and heat increase the space available to each section of chain, because the molecules are pulled apart. Vulcanization of rubber creates disulfide bonds between chains, so it limits the degrees of freedom. The result is that the chains tighten more quickly for a given strain, thereby increasing the elastic force constant and making rubber harder and less extensible. When cooled below the glass transition temperature, the quasifluid chain segments freeze into fixed geometries and the rubber abruptly loses its elastic properties, although the process is reversible. This property it shared by most elastomers. At very low temperatures, rubber is rather brittle. This critical temperature is the reason winter tires use a softer version of rubber than normal tires. The failing rubber o-ring seals that contributed to the cause of the Challenger disaster were thought to have cooled below their critical temperature; the disaster happened on an unusually cold day. The gas molecules in the rubber were too close to their bound solid molecules(a partial phase change that separated the rubber molecules may have occurred), allowing the rubber to take on a more solid shape(a partial phase change to a more liquid and molecularly separated form would not be good, either). Heated gas has a higher energy, and rubber must be kept at specific temperatures and probably should not be used on vehicles that undergo extreme temperature changes. Chemical makeup[edit] Latex is the polymer cis-1,4-polyisoprene – with a molecular weight of 100,000 to 1,000,000 daltons. Typically, a small percentage (up to 5% of dry mass) of other materials, such as proteins, fatty acids, resins, and inorganic materials (salts) are found in natural rubber. Polyisoprene can also be created synthetically, producing what is sometimes referred to as synthetic natural rubber, but the synthetic and natural routes are completely different.[1] Chemical structure of cis-polyisoprene, the main constituent of natural rubber: Synthetic cis-polyisoprene and natural cis-polyisoprene are derived from different precursors. Some natural rubber sources, such as gutta-percha, are composed of trans-1,4-polyisoprene, a structural isomer that has similar, but not identical, properties. Natural rubber is an elastomer and a thermoplastic. Once the rubber is vulcanized, it will turn into a thermoset. Most rubber in everyday use is vulcanized to a point where it shares properties of both; i.e., if it is heated and cooled, it is degraded but not destroyed. The final properties of a rubber item depend not just on the polymer, but also on modifiers and fillers, such as carbon black, factice, whiting, and a host of others. Biosynthesis[edit] Rubber particles are formed in the cytoplasm of specialized latex-producing cells called laticifers within rubber plants.[6] Rubber particles are surrounded by a single phospholipid membrane with hydrophobic tails pointed inward. The membrane allows biosynthetic proteins to be sequestered at the surface of the growing rubber particle, which allows new monomeric units to be added from outside the biomembrane, but within the lacticifer. The rubber particle is an enzymatically active entity that contains three layers of material, the rubber particle, a biomembrane, and free monomeric units. The biomembrane is held tightly to the rubber core due to the high negative charge along the double bonds of the rubber polymer backbone.[7] Free monomeric units and conjugated proteins make up the outer layer. The rubber precursor is isopentenyl pyrophosphate (an allylic compound), which elongates by Mg2+-dependent condensation by the action of rubber transferase. The monomer adds to the pyrophosphate end of the growing polymer.[8] The process displaces the terminal high-energy pyrophosphate. The reaction produces a cis polymer. The initiation step is catalyzed by prenyltransferase, which converts three monomers of isopentenyl pyrophosphate into farnesyl pyrophosphate.[9] The farnesyl pyrophosphate can bind to rubber transferase to elongate a new rubber polymer. The required isopentenyl pyrophosphate is obtained from the mevalonate pathway, which is derives from acetyl-CoA in the cytosol. In plants, isoprene pyrophosphate can also be obtained from 1-deox-D-xyulose-5-phosphate/2-C-methyl-D-erythritol-4-phosphate pathway within plasmids.[10] The relative ratio of the farnesyl pyrophosphate initiator unit and isoprenyl pyrophosphate elongation monomer determines the rate of new particle synthesis versus elongation of existing particles. Though rubber is known to be produced by only one enzyme, extracts of latex have shown numerous small molecular weight proteins with unknown function. The proteins possibly serve as cofactors, as the synthetic rate decreases with complete removal.[11] Current sources[edit] Close to 21 million tons of rubber were produced in 2005, of which approximately 42% was natural. Since the bulk of the rubber produced is of the synthetic variety, which is derived from petroleum, the price of natural rubber is determined, to a large extent, by the prevailing global price of crude oil.[12][13] Today, Asia is the main source of natural rubber, accounting for about 94% of output in 2005. The three largest producing countries, Thailand, Indonesia (2.4m tons)[14] and Malaysia, together account for around 72% of all natural rubber production. Natural rubber is not cultivated widely in its native continent of South America due to the existence of South American leaf blight, and other natural predators of the rubber tree. Cultivation[edit] Rubber is generally cultivated in large plantations. See the coconut shell used in collecting latex, in plantations in Kerala, India Rubber latex is extracted from rubber trees. The economic life period of rubber trees in plantations is around 32 years – up to 7 years of immature phase and about 25 years of productive phase. The soil requirement of the plant is generally well-drained, weathered soil consisting of laterite, lateritic types, sedimentary types, nonlateritic red, or alluvial soils. The climatic conditions for optimum growth of rubber trees are: Rainfall of around 250 cm evenly distributed without any marked dry season and with at least 100 rainy days per year Temperature range of about 20 to 34 °C, with a monthly mean of 25 to 28 °C High atmospheric humidity of around 80% Bright sunshine amounting to about 2000 hours per year at the rate of six hours per day throughout the year Absence of strong winds Many high-yielding clones have been developed for commercial planting. These clones yield more than 2,000 kg of dry rubber per hectare per year, when grown under ideal conditions. Field coagula[edit] Mixed field coagula Smallholders lump at a remilling factory There are four types of field coagula, cuplump, treelace, smallholders’ lump and earth scrap. Each has significantly different properties.[15] Cuplump is the coagulated material found in the collection cup when the tapper next visits the tree to tap it again. It arises from latex clinging to the walls of the cup after the latex was last poured into the bucket, and from late-dripping latex exuded before the latex-carrying vessels of the tree become blocked. It is of higher purity and of greater value than the other three types. Treelace is the coagulum strip that the tapper peels off the previous cut before making a new cut. It usually has higher copper and manganese contents than cuplump. Both copper and manganese are pro-oxidants and can lower the physical properties of the dry rubber. Smallholders’ lump is produced by smallholders who collect rubber from trees a long way away from the nearest factory. Many Indonesian smallholders, who grow paddy in remote areas, tap dispersed trees on their way to work in the paddy fields and collect the latex (or the coagulated latex) on their way home. As it is often impossible to preserve the latex sufficiently to get it to a factory that processes latex in time for it to be used to make high quality products, and as the latex would anyway have coagulated by the time it reached the factory, the smallholder will coagulate it by any means available, in any container available. Some smallholders use small containers, buckets etc., but often the latex is coagulated in holes in the ground, which are usually (but not always) lined with plastic. Acidic materials and fermented fruit juices are used to coagulate the latex – a form of assisted biological coagulation. Little care is taken to exclude twigs, leaves, and even bark from the lumps that are formed, which may also include treelace collected by the smallholder. Earth scrap is the material that gathers around the base of the tree. It arises from latex overflowing from the cut and running down the bark of the tree, from rain flooding a collection cup containing latex, and from spillage from tappers’ buckets during collection. It contains soil and other contaminants, and has variable rubber content depending on the amount of contaminants mixed with it. Earth scrap is collected by the field workers two or three times a year and may be cleaned in a scrap-washer to recover the rubber, or sold off to a contractor who will clean it and recover the rubber. It is of very low quality and under no circumstances should it be included in block rubber or brown crepe. Processing[edit] Removing coagulum from coagulating troughs The latex will coagulate in the cups if kept for long. The latex has to be collected before coagulation. The collected latex, field latex, is transferred into coagulation tanks for the preparation of dry rubber or transferred into air-tight containers with sieving for ammoniation. Ammoniation is necessary to preserve the latex in colloidal state for long. Latex is generally processed into either latex concentrate for manufacture of dipped goods or it can be coagulated under controlled, clean conditions using formic acid. The coagulated latex can then be processed into the higher-grade, technically specified block rubbers such as SVR 3L or SVR CV or used to produce Ribbed Smoke Sheet grades. Naturally coagulated rubber (cup lump) is used in the manufacture of TSR10 and TSR20 grade rubbers. The processing of the rubber for these grades is a size reduction and cleaning process to remove contamination and prepare the material for the final stage of drying.[16] The dried material is then baled and palletized for storage and shipment in various methods of transportation. Transportation[edit] Natural rubber latex is shipped from factories in south-west Asia, South America, and North Africa to destinations around the world. As the cost of natural rubber has risen significantly, the shipping methods which offer the lowest cost per unit of weight are preferred. Depending on the destination, warehouse availability, and transportation conditions, some methods are more suitable to certain buyers than others. In international trade, latex rubber is mostly shipped in 20-foot ocean containers. Inside the ocean container, various types of smaller containers are used by factories to store latex rubber.[17] Uses[edit] Compression molded (cured)rubber boots before the flashesare removed Contemporary manufacturing[edit] Around 25 million tonnes of rubber is produced each year, of which 42 percent is natural rubber. The remainder is synthetic rubber derived from petrochemical sources. Around 70 percent of the worlds natural rubber is used in tires. The top end of latex production results in latex products such as surgeons gloves, condoms, balloons and other relatively high-value products. The mid-range which comes from the technically-specified natural rubber materials ends up largely in tires but also in conveyor belts, marine products and miscellaneous rubber goods. Natural rubber offers good elasticity, while synthetic materials tend to offer better resistance to environmental factors such as oils, temperature, chemicals or ultraviolet light and suchlike. Cured rubber is rubber which has been compounded and subjected to the vulcanisation process which creates cross-links within the rubber matrix. Prehistoric uses[edit] The first use of rubber was by the Olmecs, who centuries later passed on the knowledge of natural latex from the Hevea tree in 1600 BC to the ancient Mayans. They boiled the harvested latex to make a ball for a Mesoamerican ballgame.[18] Pre-World War II manufacturing[edit] Other significant uses of rubber are door and window profiles, hoses, belts, gaskets, matting, flooring, and dampeners (antivibration mounts) for the automotive industry. Gloves (medical, household and industrial) and toy balloons are also large consumers of rubber, although the type of rubber used is concentrated latex. Significant tonnage of rubber is used as adhesives in many manufacturing industries and products, although the two most noticeable are thepaper and the carpet industries. Rubber is also commonly used to make rubber bands and pencil erasers. Pre-World War II textile applications[edit] Rubber produced as a fiber, sometimes called elastic, has significant value for use in the textile industry because of its excellent elongation and recovery properties. For these purposes, manufactured rubber fiber is made as either an extruded round fiber or rectangular fibers that are cut into strips from extruded film. Because of its low dye acceptance, feel and appearance, the rubber fiber is either covered by yarn of another fiber or directly woven with other yarns into the fabric. In the early 1900s, for example, rubber yarns were used in foundation garments. While rubber is still used in textile manufacturing, its low tenacity limits its use in lightweight garments because latex lacks resistance to oxidizing agents and is damaged by aging, sunlight, oil, and perspiration. Seeking a way to address these shortcomings, the textile industry has turned to neoprene (polymer of chloroprene), a type of synthetic rubber, as well as another more commonly used elastomer fiber, spandex (also known as elastane), because of their superiority to rubber in both strength and durability. Vulcanization[edit] Main article: Vulcanization Natural rubber is often vulcanized, a process by which the rubber is heated and sulfur, peroxide or bisphenol are added to improve resistance and elasticity, and to prevent it from perishing. The development of vulcanization is most closely associated with Charles Goodyear in 1839.[19] Before World War II era manufacturing, carbon black was often used as an additive to rubber to improve its strength, especially in vehicle tires. Today, all vehicle tires are made of synthetic rubbers. Allergic reactions[edit] Main article: Latex allergy Some people have a serious latex allergy, and exposure to natural latex rubber products such as latex gloves can cause anaphylactic shock. The antigenic proteins found in Hevealatex may be deliberately reduced (though not eliminated)[20] through processing. Latex from non-Hevea sources, such as Guayule, can be used without allergic reaction by persons with an allergy to Hevea latex.[21] Some allergic reactions are not to the latex itself, but from residues of chemicals used to accelerate the cross-linking process. Although this may be confused with an allergy to latex, it is distinct from it, typically taking the form of Type IV hypersensitivity in the presence of traces of specific processing chemicals.[20][22]

What Could Have Been... :: essays research papers

  Ã‚  Ã‚  Ã‚  Ã‚  As I started down the long, narrow, hallway I felt my heart beating faster and my stomach rising into my throat. With much difficulty I kept my head up and my eyes forward, trying desperately to not view inside any of the rooms to the left or right. The hospital smell was stronger then ever and every little noise seemed as loud as thunder...almost like I had two water glasses up to my ears that just echoed every sound. Suddenly I’m stopped dead in my tracks by an orderly who senses that I’m lost or at least having trouble finding whatever it is that I was looking for. She was very sweet, and we probably conversed for a good 3 minutes, but no matter how hard I try I cannot remember one word that we exchanged. It’s almost like I had a conversation with her in my sleep and the second I walked past her it was like a dream, which I was barely able to remember. Well I guess I should explain where I am and why I’m here before I continue with m y story...we’ll go back to 3 hours ago, that should catch you up to speed.   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"Shit Sean your such a dumb ass, how could you forget the tap? How the hell are we supposed to get into a keg without a fucking tap? So now what do you suppose we do...get a nail gun and poke holes through it and get the whole 30 people at our party straws? I can’t rely on you to do anything right!†   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"Jesus Kim, I’m sorry, I just forgot, kill me why don’t you...I’m sorry I’m sorry I’m sorry, what else can I say? Instead of sitting here and lecturing me about it why don’t you just get off your ass and come with me to find one?†   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"No Sean, your on your own here, that was your only job, and I think you can handle it yourself, I have a ton of stuff to get ready here at the house.†   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"Fine!†   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"Fine!†   Ã‚  Ã‚  Ã‚  Ã‚  As the door slammed I ran into the kitchen to start getting things ready for our little get together that my brother and I had been planning since our parents told us about their little trip to NYC for the weekend. The worst part about all of this is that I could have really cared less about the party, I have been in college for 2 years now, and sitting around and getting drunk really wasn’t unexplored territory.

Describe the Three Different Parenting Styles and Discuss How They Might Impact on Children’s Behavior

According to Diana Baumrind, a clinical and developmental psychologist, parents will use one of three parenting styles. Baumrind based these three parenting styles on four factors; Disciplinary strategies, Warmth and Nurturance, Communication styles and expectations of maturity and control, these were identified as the four dimensions of parenting. I will now discuss the three parenting styles and the impacts these styles have on children’s behaviour. Baumrind’s three parenting style’s, based on the four dimensions of parenting are; Authoritarian, Permissive and Authoritative. Authoritarian parents set very strict disciplinary rules; they expect their children to follow strict rules and regulations with strict boundaries. They exert their control over their children by telling them what they can and can’t do, without giving them choices or options. Authoritarian parents often scold and punish their children, often in a harsh manner, for not following their rules. Words and phrases an Authoritarian parent may use might include; â€Å"‘No you can’t †¦. ’, ‘Because I say so, that’s why’, ‘Do it, do it NOW! † (2013) According to Baumrind, these parents are â€Å"obedience and status orientated and expect their orders to be obeyed without explanation† (1991) Permissive parents make very few demands on their children and rarely discipline or punish them. They have low expectations of self-control and maturity and are often communicative and nurturing with their children, preferring to be more of a friend than a parent. Words and phrases a Permissive parent may use might include; â€Å"’It’s up to you. If that’s what you really want to do then †¦. ’’The reason for wanting you to †¦Ã¢â‚¬ ¦ is †¦Ã¢â‚¬ ¦. ’Well, if you don’t feel like it †¦.. ’† (2013) According to Baumrind, Permissive parents â€Å"are more responsive than they are demanding. They are non-traditional and lenient and do not require mature behaviour, they allow considerable self-regulation and avoid confrontation† (1991) Authoritative parenting style is very much like the Authoritarian parenting style in as much as they also like to establish rules and guidelines that their children are expected to follow, however, this style is much more lenient as these parents realise that sometim es flexibility is required. When children fail to meet expectations, the parents are nurturing and forgiving. Authoritative parents are responsive to their children and are willing to listen to and answer questions asked by the child / children. Words and phrases an Authoritative parent may use might include;†Ã¢â‚¬â„¢This is my view†¦.. but what are your thoughts? ’, ‘Sorry, but I thought we agreed †¦Ã¢â‚¬ ¦ ’† (2013) Baumrind suggests that these parents â€Å"monitor and impart clear standards for their children’s conduct. They are assertive, but not intrusive and restrictive. Their disciplinary methods are supportive rather than punitive. They want their children to be assertive as well as socially responsible and self-regulated as well as co-operative† (1991) Behaviour can be both good and bad, of the three parenting styles, the Authoritarian is the most ineffective as children will be obedient, but disrespectful, angry, mistrustful, defiant, withdrawn and rebellious (as they grow up) due to the strict rules and regulations set by the parents. Permissive parenting is deemed a very negligent style of parenting due to the lack of rules and boundaries, although impacts can be both negative and positive, children of permissive parents tend to be irresponsible, impulsive, immature, insecure, demanding, self-centred and will show a poor performance academically, but positive impacts are better social skills and belief in themselves. The Authoritative style has to be the best style of parenting as they exercise a balanced control over their children by setting clear standards, rules and guidelines with non-punitive punishment, whilst encouraging them to be independent individuals, they will listen to what the child has to say and is open to negotiation leading to happy, socially competent children who are independent and full of self-esteem. It is not only parenting styles that impact on children’s behaviour; other factors in a child’s life can also affect behaviour, i. e. negative or traumatic family incidents like bereavement, illness, abuse, cultural and religious beliefs, bullying and peer pressure to name but a few, for example; â€Å"Thomas found it hard to adjust to sharing his parents with Rowanna when she was first born† causing his behaviour to change dramatically. (Open University 2013, pg32) To conclude, I have shown that parenting styles vary considerably, have different impacts on children and behaviour and all have negative and positive effects and that it is not just parenting styles that impact on children’s behaviour, as children raised in dramatically different environments can later grow up to have remarkably similar personalities and also children who share a home and are raised in the same manner, can grow up to have dramatically different personalities. But of the three parenting style’s, the one deemed to be the best style of parenting is the Authoritative parenting style, as it is a well balanced style with warmth, support and acceptance. There is control over children but without being controlling. There are firm rules and guidelines set in place, but there is room for flexibility when needed leading to happy, socially competent, independent, confident high achieving children.

A Variety Of Literature Revolves Around Identity - 1826 Words

Aiswarya Vincent Professor Chad Jewett First Draft English 2203W 20 November 2014 Identity A variety of literature revolves around identity. In fact, most stories include the dilemma with self-identity no matter what format or media they are told in. The thought process of Esther Greenwood from Sylvia Plath’s novel â€Å"The Bell Jar† reveals a complex array of desires and ideals based on high expectations, all of which are never met and aid in her depression. Sylvia Plath parallels her struggle with depression and illustrates the pressures that illicit this psychosis in The Bell Jar. It is plainly woven through 1950s society how women often spiraled into depression from both the restrictions and the high expectancy that conforms them. Esther Greenwood is the main character in Sylvia Plath’s novel The Bell Jar. Esther is brilliant, beautiful, enormously talented, and successful, but slowly going under—maybe for the last time (Plath). If we take the division of Esther’s self as the motive or starting point of the novel’s plot, the central action of The Bell Jar may be described as the attempt to heal the fracture between inner self and false-self system so that a real and viable identity can come into existence. But because, everyone in a way wears a mask, Esther’s experience differs from that of so-called â€Å"normal† girls in degree rather than in kind. It is simply a stylized or heightened version of the young American girl’s quest to forge her own identity, to be herself ratherShow MoreRelatedRace, Ethnicity, Art and Film Essay826 Words   |  4 Pagesis belonging to a specific ethnic group possessing distinct culture and common origin. This is called inscriptiv e group identity. According to Said Edward (1993) a good introduction to matters of societal concern and especially those of out context should be put into their political and social cultural contexts. 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The literature of Romanticism allowed people to escape the harshness of realityR ead MoreRomanticism s Impact On America Essay1376 Words   |  6 Pagesthe years 1800 and 1860, left a significant impact on not only the literature of that time, but the literature of today as well. Prior to romantic writings, the world focused on society and logic. Romanticism allowed people to start valuing individualism and to appeal to emotional responses. This new way of thinking brought new literary styles, themes, and genres that were never explored before and are still found today. The literature of Romanticism allowed people to escape the harshness of realityRead MoreThe Issue Of Same Sex Marriage966 Words   |  4 Pagesmarriage concur that the legal ramifications of same-sex marriage should not revolve simply around hetero couples but rather the overcoming of challenges by all couples. The most recent couple of years there have been a great deal of civil debates over same-sex unions and their children and the worry of their family structure s impact on them (Lannutti, 2005). The literature on family structure has been centered on basic varieties inside of hetero couples, differentiating heterosexual married couplesRead MoreCan Critical Regionalism Counteract The Impact Of Globalization On Our Cities?1532 Words   |  7 Pagesencounter between ourselves and the local culture† (Koolhaas, 2012). If the notion of Critical Regionalism were to be practiced by architects through the integration of the local culture with modern techniques, it could potentially return the missing identities of these cities. Critical Regionalism was devised during the early 20th century, as an attempt to reject the monotony developed by the International Style and the purposeless ornamentation utilised by Postmodernism. The term itself was first coined

Vaccines Changing History - Free Essay Example

Sample details Pages: 5 Words: 1577 Downloads: 1 Date added: 2019/07/31 Category Medicine Essay Level High school Tags: Vaccines Essay Did you like this example?   Modern vaccines have been around for over a century, with the idea of vaccinations going back to ancient China and India. Most credit Edward Jenner for creating the first smallpox vaccine in the early 1770s; however, he is simply the first to do a scientific experiment and document the process.   Louis Pasteurs work would pave the way for the concept of modern vaccinations.   Doctors and scientists continue to find ways to prevent diseases causing disability and death.   Without vaccinations, many would continue to suffer diseases and the long-term effects related to them.   By preventing these illnesses, and related disabilities and death, vaccines allow people to grow and have healthy productive lives.   Especially in todays truly global economy where extensive travel is extremely common for large portions of the worlds population due to work, education or pleasure.   Although allegations of negative side effects plague the vaccination process, vaccinations continue to help today prevent illness, diseases, and death making it one of the most important events in world history.  . Don’t waste time! Our writers will create an original "Vaccines Changing History" essay for you Create order The idea of vaccinations has been around for thousands of years.   Vaccination introduces a particular disease or illness†into a patients body.   The idea is that if the patient is subsequently exposed to a full dose of the pathogen in the future then the vaccination will have trained their natural immune system to attack and destroy it. (Parsons, 97) Ancient Indian texts talked about building immunity to illnesses.   During the Medieval era, China found a way to expose people to smallpox scabs to lessen the likelihood they would contract smallpox or at least have a severe case of smallpox.   Centuries later, English Lady Mary Montagu visited Constantinople and saw natives exposing people to smallpox to lessen the severity or existence of the disease.   Returning to England, she sought help to explore this.   Edward Jenner explored the idea of vaccination for smallpox through experiments with cowpox; however, he hated the unpredictability of exposing people to a dis ease where he could not control the severity if they got it.   Obviously, smallpox was a deadly disease in populations who continued to struggle with outbreaks, but it devastated new populations, like Native Americans, who had no prior exposure to it.   There civilizations had no immunities to the disease; therefore, entire populations were annihilated during the height of European exploration.   The precursor to the modern-day flu, the Spanish Influenza was horrific.   No other epidemic has claimed as many lives as the Spanish Influenza epidemic in 1918-1919 worldwide. (Influenza Pandemics) It is estimated between 40-70 million people died from the Spanish Influenza.   Sadly, an effective flu vaccine would not be developed for many years; however, health leaders have a plan in place should an outbreak like this happen again.  Ã‚   Polio is another disease that literally crippled the population.   When outbreaks occurred, many people lived with symptoms of varying strengths for the rest of their lives.   This disease caused muscle and joint issues which developed into serious disabilities over the years, paralysis, and even death.   In addition, yellow fever ran rampant throughout areas populations causing illness, liver disease and failure resulting in death.  Ã‚  Ã‚   The fact that these examples of diseases are virtually unheard of in the United States and around the world substantiates the point that vaccines work to keep people healthier.   The last natural case of small pox occurred in 1977.   The World Health Organization has declared this disease eradicated and the vaccine has been retired.   On March 14, 2018 the World Health Organization also published on their polio fact sheet that rates of polio throughout the world have decreased 99% down to 22 reported cases in 2017 and two of three strains have been eradicated throughout the world.   The vaccine for yellow fever is on the World Health Organizations List of Essential Medicines.   These statistics speaks volume for the success of these vaccines and the quality of life for those who remain healthy rather than suffering from any of these diseases.   The future of vaccines continues to progress.   Doctors still research vaccines for diseases that plague the world at large like malaria.   There is a pill for prevention and treatment; however, no effective vaccine.   In the last 30 years, doctors have worked to develop a human papillomavirus (HPV) which has effectively proven to help prevent certain forms of cancer. Researchers hope to find more vaccines for more cancers and other deadly diseases like AIDS which have no known cures.   The effectiveness of vaccines is not shown through the number of deaths, but the decreasing frequency of disease occurrences.   Statistics consistently show remarkable decreases in the occurrence of diseases with vaccines in areas where vaccines are used.  Ã‚  Ã‚  Ã‚   With all this supporting the use and success of vaccines, there are still groups who not only do not vaccinate, but also advocate against vaccinations.   There are many reasons but two of the most common are safety concerns and political issues.   There is a growing movement that claim vaccinations cause autism.   Concerns caused Japan to ban the MMR vaccine in the early 1990s.   Dr. Hideo Honda conducted a study that showed autism rates are continuing to rise even though the vaccine has been banned in that country. In Japanese Study is more evidence that MMR does not cause autism, Andrew Cole quotes, In the United Kingdom Evan Harris, a member of the House of Commons science and technology select committee, stated The problem is that you cannot prove a negative. The people making a link are not using rational arguments, so the usual scientific approach will never convince them, and they will continue to lobby in the media.   The point is that when children and family healt h is at risk, people are emotional and look for someone to blame for illness or disability. Currently, not one single study can show direct causation between vaccination and autism; however, groups opposed to vaccines grow each year and continue to lobby Congress and the media to protect children by ceasing vaccinations.     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The second objection to vaccinations is more common in third world countries where poverty is an additional complication.   In some countries, the poor and uneducated are told that vaccines are the western worlds method of sterilizing or infecting the local populations.   Sometimes, political and religious objects overlap as in the Muslim countries.   On the History of Vaccines website, their article Cultural Perspectives on Vaccination states, the local Taliban in Southern Afghanistan have called polio vaccination an American ploy to sterilize Muslim populations and an attempt to avert Allahs will.  Ã‚   When those in power cast doubt on effectiveness and even question the morality of the vaccine, the population will follow those in power.   However, more often it allows governments to control access to vaccines and their populations if they are dealing with illness and disease they cannot cause chaos within their country.  Ã‚   Many organiza tions such as the World Health Organization try to overcome as many of these objections and obstacles as possible to move toward healthier world populations. While no studies can officially show how many lives have been saved due to vaccinations, studies can and do show their effectiveness.  Ã‚   Most vaccine studies are done on morbidity not mortality of the disease.   The hope for vaccines is that it lowers the occurrence (morbidity) of the disease, not on how many deaths the disease cause.   Vaccines do not prevent death, they hope to prevent the illness itself that causes the death.   Until a disease is eradicated, there will always be a threat of death with a disease in certain cases.   Vaccines hope to improve the odds that the disease will not affect large numbers of the population.   Studies have shown reductions in rates of diseases for which there are vaccines.   This supports the idea that vaccines work. The invent and continued development of vaccines has improved and saved the lives of countless individuals throughout the world.   The World Health Organization lists the following benefits of vaccinations: decreased resistance to antibiotics, healthcare savings, extending life expectancy, protection against bioterrorism, helping economic growth, and benefiting equity.   The World Health Organization in their February 2008 Bulletin continued We conclude that a comprehensive vaccination program is a cornerstone of good public health and will reduce inequities and poverty.   Not only have vaccines helped save lives, protect people from illness, and disability, they have also helped improve peoples quality of life and length of life.   Thus making vaccinations one of the most important events in world history and continuing to help the world population through continued research and development.  Ã‚   Works Cited Allen, Arthur, Vaccine: The Controversial Story of Medicines Greatest Lifesaver, W W Norton Company, New York, 2007. Cole, Andrew, Japanese study is more evidence that MMR does not cause autism, BMJ Publishing Group, March 12, 2005, (www.ncbi.nlm.nih.gov/pmc/articles/PMC554056) Cultural Perspectives on Vaccination, History of Vaccines by The College of Physicians of Philadelphia, January 10, 2018, (www.historyofvaccines.org/content/articles/cultural-perspectives-vaccination) Goddard, Jolyon, editor, National Geographic Concise History of Science Invention, Brown Reference Group, Washington, DC, 2010. Haven, Kendall, 100 Greatest Science Discoveries of All Time, Libraries Unlimited, Westport Connecticut, 2007. (53,54) Influenza Pandemic, History of Vaccines by The College of Physicians of Philadelphia, January 11, 2018 (www.historyofvaccines.org/index.php/content/articles/influenza-pandemics) Parker, Steve editor, Medicine: The Definitive Illustrated History, Dorling Kindersley Ltd, New York, 2016. Parsons, Paul, Science in 100 Key Breakthroughs, Firefly Books, New York, 2011. (97-99) Poliomyelitis Fact Sheet, The World Health Organization, March 14, 2018, (www.who.int/news-room/fact-sheets/detail/poliomyelitis) Vaccination greatly reduces disease, disability, death and inequity worldwide, Bulletin of The  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   World Health Organization, Volume 86, Number 2, February 2008,   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  (www.who.int/bulletin/volumes/86/2/07-040089/en)

The Evolution Of Social Welfare Policy - 955 Words

The Evolution Of Social Welfare Policy In â€Å"Reluctant Welfare State† Jansson reveals to us society in mid-twenith century. It was the end of a long war. The econmy was at full employment and people had homes. Due to a series events that took place, it changed the outcome of the Unites States during the mid-twenith century. New laws were impeached, and their were protection laws for the people. President Harry S. Truman was elected president in 1945. During his administration Korean War had begun. After the war military spending went down. Because North Korea invaded South Korea, President Truman raised military spending from 10 billion to 40 billion. Europe and Japan were economically devastated by the WWII. Meanwhile the United States prospered through hard economic times. The U.S dominated the world trade. American Industry created jobs thus trade was expanding manufacture goods such as automobile and housing was made affordable. The government cut taxes for homeowners. In 1941 Pearl harbor WWII ,Jansson noted that it wasn’t the programs of FDR it was WWII that turned the economy around. The G.I bill was passed in 1942 after the war. It was a bill to help veterans called 1946 Nation Health Act Mental Health. President Eisenhower was elected as president in 1953. He was a military war veteran, who ended the Korean war. Eisenhower pointed out in his speech â€Å"Every dolllor spent on guns is a dollor not spent on humanitarian programs† (Jansson,2012, p.255). The Cold WarShow MoreRelatedThe Importance Of Ethical Business Is Not New1334 Words   |  6 Pagespractices. There are lessons to be learned, both positive and negative, from businesses around the world. CEOs must work hard to find a balance between profits and public image by learning from history, understanding the evolution of business ethics, and understanding the social responsibility of businesses. CEOs in the business world today are in a precarious position. 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Economics for Business Prospects for Faculty

Question: Describe about the Economics for Business for Prospects for Faculty. Answer: Introduction This study has been focused to the concept of Economics for business. In this respect, this study has aimed to the demand and supply of a particular product. The particular product has been chosen as the dairy products of Australia. The demand for the dairy products in Australia has been increasing over the time. This will in turn reflect the production of the dairy products of the country (Australia 2014). Moreover, with the rise in the demand for a particular product, there occur or arise two possible situations, which have been discussed in this study. In this context, this study also focused to the factors, which can affect the demand as well as the supply sides of the market of dairy products. The affecting factors such as the income level of the consumers, their demographic situation etc have been mentioned in this study (Bowen and Sosa 2014). Demand and supply of dairy products in Australia and the factors that affect the demand and supply sides of the market According to the statement of Bruneel et al. (2012), the Australian consumer dairy manufacturing items are such as milk, butter, yoghurt and butter. With the increase in time, the demand for the dairy products has been increasing in Australia. The overall retail volume of the dairy products and the growth of the business has also been increased within the industry. The valuation growth for the dairy products has been increased by 5.4%. In addition, the trend of the per capita consumption has been rising significantly over the past two decades. These trends of the consumption of dairy products depend upon the taste and preferences of the buyers. These demand choices for the dairy products reflect the supply of the products. In the words of Bruneel et al. (2012), based on this taste and preferences of the consumers, the producers aimed to the manufacturing procedure. In addition, the consumers are also looking for the development of the products, the flavour and the quality of the deli vered goods, packaging as well as the innovations etc. It is known that the increase of the demand for a particular product will effectively enhance the supply of the product. As mentioned by Doidge, Segal and Gospodarevskaya (2012), the per capita consumption of milk has been reached to the highest peak. Therefore, it can be mentioned that there may arise two situations. Due to the rise in demand, the supply of the products may fall. Moreover, the price of the dairy products will also increase. In case of giffen goods, with the rise in price of the products, the demand for the product will not change. This violates the rule of the law of demand as mentioned by Klerkx and Nettle (2013). Therefore, it can be stated that if the milk products in Australia is assumed as the giffen goods, then the increase in price will not reduce the sale of the particular product. On the contrary, if the dairy products are not seemed to the giffen goods, then the rise in price will reduce the demand for the products. Moreover, in case of giffen goods, incom e effect compensated the substitution effect (Klerkx and Nettle 2013). Figure 1: Demand for the giffen goods (Source: Created by author) From the above figure, it can be observed that in case of the giffen goods, with the rise in the price of the products, the demand for the product will not decreased. It will remain same (Obizhaeva and Wang 2013). Therefore, with the rise in price from P0 to P1, the demand will also increase from Qo to Q1 and therefore, the demand curve is upward sloping. In order to discuss the affecting factors, it will be helpful to identify how these factors influence the demand and the supply of the dairy products in Australia. As per the statement of Roberts and Schlenkera (2013), the production of dairy items depends upon the regional distribution within the country. In addition, growth of the population also influences the total sales. As a result, to maintain the sales volume, the demand for the product will also significantly increase. Therefore, it can be observed that the supply of dairy products is higher in urban areas of Australia compared to the rural area and the products are supplied from the rural areas to urban areas (Zilberman et al. 2012). Moreover, the demand for the dairy products also depends upon the income level, as prices are the reflecting determinant of demand for the dairy products. Higher the level of income, greater will be the demand for the products. Hence, in case of giffen goods, the higher income group people can afford the price of the manufacturing dairy products. Therefore, the supply will also increase (Roberts and Schlenkera 2013). The suppliers will be profitable. On the contrary, in case of lower income group people, they cannot afford the increasing price and therefore, in this case the supply for the dairy products will decrease. On the other hand, Obizhaeva and Wang (2013) opined that the demand for a product enhance the supply of that definite product. In this respect, it can be stated that if the demand for milk s higher than the demand for butter, then the firms require to produce more milk in order to meet the supply. Conclusion The overall study has been developed on the concept of economics for business. In this study, the demand for the dairy products in Australia has been observed. After the analysis, it can be seen that the per capita consumption of the dairy products has been increasing in Australia. As a result, to meet the demand the supply has been also increasing. On the other hand, the factors, which can influence the demand and supply of the dairy products, have been identified. In this connection, it can be stated that the demographic conditions, the growth of population can influence the demand of the dairy products as well as the supply will also influence. References Australia, D., 2014. Australian Dairy Industry.Dairy Australia. Available online: www. dairyaustralia. com. au/Industry-information/About-the-industry. aspx. Bowen, W.G. and Sosa, J.A., 2014.Prospects for faculty in the arts and sciences: A study of factors affecting demand and supply, 1987 to 2012. Princeton University Press. Bruneel, J., Ratinho, T., Clarysse, B. and Groen, A., 2012. The Evolution of Business Incubators: Comparing demand and supply of business incubation services across different incubator generations.Technovation,32(2), pp.110-121. Doidge, J.C., Segal, L. and Gospodarevskaya, E., 2012. Attributable risk analysis reveals potential healthcare savings from increased consumption of dairy products.The Journal of nutrition,142(9), pp.1772-1780. Klerkx, L. and Nettle, R., 2013. Achievements and challenges of innovation co-production support initiatives in the Australian and Dutch dairy sectors: a comparative study.Food Policy,40, pp.74-89. Obizhaeva, A.A. and Wang, J., 2013. Optimal trading strategy and supply/demand dynamics.Journal of Financial Markets,16(1), pp.1-32. Roberts, M.J. and Schlenkera, W., 2013. Identifying supply and demand elasticities of agricultural commodities: Implications for the US ethanol mandate.The American Economic Review,103(6), pp.2265-2295. Zilberman, D., Hochman, G., Rajagopal, D., Sexton, S. and Timilsina, G., 2012. The impact of biofuels on commodity food prices: Assessment of findings.American Journal of Agricultural Economics, p.aas037.