Theory Of Natural Selection By Darwin

Theory Of Natural Selection By Darwin This paper gives an explanation of Darwins theory of natural selection. As well, the paper fully gives a description of natural selection in terms of modern evolutionary synthesis of the 20th century. The paper also gives application of the principles of natural selection to explain the current problem of antibiotics resistance in bacteria. Finally the paper gives a summary of scientific theories about evolution before Darwins discovery of natural selection. Generally this is a very important theory which has been greatly adopted by students and teachers of genetics presently. Outline Introduction Summary of Scientific Theories about Evolution before Darwins Discovery of Natural Selection Description Of How The Discovery Was Made By Darwin. Natural Selection In Terms Of the Modern Evolutionary Synthesis Of the 20th Century Natural Selection and Its Relationship to Antibiotic Resistance in Bacteria Conclusion Introduction Charles Darwin is known to be the father of evolution and heredity and came up with principles that govern heredity. His one outstanding principle is that of natural selection that dictates that if evolution was elucidated as a car, and then the theory of natural selection would be its engine. The theory categorically states that its the nature that controls and select organisms, which tend to have favorable characteristics for survival while at the same eliminating species that are inferior (Fairfield, 2000). Darwins theory is significantly a very important landmark in the process of evolution and origin of species. The principle is regarded as the key to the formation of new and superior species from old and existing ones. This is to say that nature selects superior traits, which are transmitted to the offspring in a manner that is independent on the other. The major explanation behind the theory is that one superior allele tends to be dominant over the others, blending a genetic make up and traits that influence a certain trait segregate during organism growth and development. Therefore, this research paper looks at all principles of natural selection, its relationship to the current problem of antibiotics resistance in bacteria, and its description in terms of modern evolutionary synthesis of the 20th century. Summary of Scientific Theories about Evolution before Darwins Discovery of Natural Selection Darwins theory of Natural Selection is generally regarded as a significant landmark in the origin of organisms and evolution process. Before Darwin, many scientists like him alleged that species evolved from other species or antecedent. Mostly during those times there was no any scientific evidence to prove that concept hence many theories went unnoticed. Prior to Darwins theory especially in medieval times, the concept of evolution was not much appreciated for the reason that origin of organisms was regarded as Gods creation. This idea claimed that organisms came into existence in a way that they were unchanged, hence going against the notion of evolution. Many scientists like Immanuel Kant established a notion of descent that was close to modern view; were he suspected that organisms may have originated from a common ancestor .His analysis emerged from studies of Orang Utang which he claimed had capacity to develop structures similar to those of man. Despite the fact that his theory is currently linked with modern views; the theory never gave any plausible mechanism that would drive changes in organisms.Carolus Linnaeus is another scientist who is viewed as the father of contemporary taxonomy in relation to his work of hierarchical classification in both plants and animals. In his theory, he viewed hybridization in plants as a process that could produce new plant species. However, he still supported the theory of creation that goes against the theory of evolution. Erasmus Darwin (Charles Darwins grandfather) was also a very illustrious naturalist who believed that life could have originated from a common ancestor. His theory states th at the disuse of organisms parts could in their own mechanism make the parts grow or shrink. Jean-Baptiste Lamarcks theory of evolution is another medieval theory that has been discredited by modern experimental evidences. His theory concentrated on the idea that living organisms could transfer certain traits acquired during natural life to its offspring. He saw organisms as immutable and not permanent (Zirkle, 1941). Another theory about Evolution before Darwins Discovery of Natural Selection is the theory of population growth that was coined by Thomas Malthus between 1766-1834. According to the theory, Malthus claimed that populations could produce large number of offsprings that could have capacity to stay alive on the available limited resources available. He viewed diseases, famine, and poverty to be the consequence of overpopulation. He never believed on the concept of evolution and he viewed the natural calamities as the wrath of God. Description of How the Discovery was Made By Darwin Charles Darwin started formulating his world-renowned theory of Natural Selection in late 1830s and early 1840s, but the process went on silent for about 25 years. Darwin conducted widespread research on animals and plants in order to learn the critical process of evolution. It was during his research work in Galà ¡pagos Islands that made him understand the theory of evolution. In his studies, he observed that birds dwelling in different islands displayed minor differences in their physical features .On one occasion he found out that different species of Finches birds had different beak sizes and shapes. After analysis, he discovered that the difference in beak sizes and shape was because of food available in particular islands (Fairfield, 2000). Contrary to this results, Darwin results showed that their was only one specific Finches species in South America, which summed up the idea that Finches species in Galà ¡pagos could have developed from species found in central parts of South America. Further research work showed that this Finches species reproduced and survived, while those that could not familiarize themselves with environment died. As a result, Darwin concluded that organisms belonging to similar species illuminated some unique variations among them (Sober, 1984).Organisms possessing favorable characteristics showed capacity to live and reproduce, consequently passing the acquired trait genetic material to the offsprings from one generation to another. With the help of Alfred Russel Wallace, would had also similar results for the birds he used in his studies, established similar theories which then led to development of the book On the Origin of Species, which was published in 1859 (Zirkle, 1941). Natural Selection In Terms Of the Modern Evolutionary Synthesis Of the 20th Century Modern Evolutionary Synthesis is defined as an amalgamation of concepts or ideas from different evolution and biological area of expertise, which gives an extensively accepted explanation of evolution. The concept of Natural Selection generally relies on the idea of heredity, which developed before the fundamental models of genetics. Evidence of natural selection in relation to Modern Evolutionary Synthesis Of the 20th Century relates to Mendels theory and research work. Despite the fact that Gregor Mendel, known to be the father of heredity who came up with principles that govern heredity, was a modern concept of Darwin work, his work became appreciated in early years of the of 20th century (Hasan, 2005). This came because of integration of Darwin theory and Mendels work which one outstanding principle is that of independent assortment which dictates that the allele pairs will separate in an independent manner during gamete formation. This is to say that the traits would be transmit ted to the offspring in a manner that is independent of the other. The major explanation behind this notion relies on the Natural Selection strategy where alleles that are dominant over the others are passed over to the next generation, where the hereditary units then influence a certain trait to segregate during gamete formation. Another evidence of natural selection in relation to Modern Evolutionary Synthesis Of the 20th Century relates to T. H. Morgan research work on Drosophila melanogaster. The concept of Natural Selection has helped establish a relationship between Chromosomal Theory of Inheritance and the Mendelian Theory Genetics, which has established that instead of mutations creating species in single steps, it creates variations in genetic makeup that varies among populations. Other modern evolution advances relates to research works of W. D. Hamilton and John Maynard Smith, which have led to development of Gene-Centric View of Evolution in the mid 1960s. This synthesis has increased the extent of Darwinian Theory of Natural Selection to include consequent scientific advances that include genetics and DNA analysis. The work of G. Ledyard Stebbins, a botanist, is another most important contributor to the natural selection in relation to Modern Evolutionary Synthesis (Sober, 1984). His work has extended the concept of natural selection where the effects of polyploidy and hybridization shows dihybrid cross involving linkage of two genes which have no crossing over. From the Law of Independent Assortment, alleles from genes assort in an independent manner during formation of the gametes. Natural Selection and Its Relationship to Antibiotic Resistance in Bacteria In recent past, some bacteria species have showed extraordinary ability to develop resistance to certain types antibiotics, which are commonly used to treat most common illnesses. An antibiotic refers to a natural matter or material that is released by fungi or bacteria to kill competing micro organisms for limited available resources. In recent past scientists have discovered that some bacteria strains have started showing resistance to certain antibiotics through different mutations, or alterations in the organisms genetic material (DNA). This resistance results in situation where changes occur in the bacteria molecular material and mostly results from events such as antibiotic over and under prescription, poor hygiene, and environmental changes. If the target bacteria obtain changes in its molecular material for genes coding a specific protein, the antibiotic then cannot bind to affected protein hence the mutant bacterial organism survive (Purdom, 2007). Under the effects of antibiotics, the process of Natural Selection occurs, thus favoring the growth, development, reproduction, and survival and of the mutant or malformed bacteria. Concept of natural selection also plays part when bacteria obtain mutated genetic material from other micro organisms, where they swap genetic material from each other. This allows transfer of DNA into the bacteria, thus altering its structure making them transfer new DNA to its offsprings.Presence of new DNA makes the next generation resistant to antibiotic. The concept of natural selection and mutation supports bacteria populations to become resistant to antibiotics. On the other hand, these changes through natural selection also lead to emergence of strains with defective proteins that tend to have abnormal functions. Conclusion Charles Darwin is known to be the father of evolution and heredity and came up with principles that govern heredity. His one outstanding principle is that of natural selection, which categorically states that, nature controls and selects organisms that have favorable characteristics for survival while at the same eliminating species that are inferior. In conclusion, it is agreeable that Charles Darwin theory of natural selection is very important in respect to heredity and evolution.

Osmosis and celery lab experiment Essay

Diffusion is simply the net movement of atoms or molecules from a region of higher concentration to a region of lower concentration. The force behind the movement is heat or kinetic energy (also called Brownian motion). Diffusion occurs when you spill water on the carpet floor and it spreads out, or when you open a bottle of perfume and it leaves the bottle and spreads throughout the air in the room. Osmosis is a similar phenomenon that moves water from a region of high water concentration to a region of low water concentration. Imagine that a cell from your body is placed in a solution of water. If the concentration of the water inside the cell is the same as the concentration of water in the solution, then we describe the water solution as being â€Å"isotonic† or having the same concentration as the water inside the cell. In this case, net movement of water will be zero and the cell will not swell or shrink. In other words, the same amount of water will move in the cells as will move out. On the other hand, if the cell is placed in a solution of water that has a higher concentration (of water) compared to the concentration of water inside the cell, then osmosis will cause more water to move into the cell than will move out and this will cause the cell to swell. In this case, we say that the solution of water is â€Å"hypotonic†. Now imagine that the cell is placed in a solution of water that has a lower concentration (of water) compared to the concentration of water inside the cell. In this case osmosis will cause more water to move out of the cell than will move in the cell and the cell will shrink. In this case, we say that the solution is â€Å"hypertonic†. Learn more about osmosis and diffusion from Chapter 3 of your textbook. CELERY EXPERIMENT We can place celery in three different water solutions to observe the effects of osmosis on the celery stalks. Salt will serve as our solute to mix with water to make the water either hypotonic, hypertonic or isotonic. The hypotonic solution will contain less salt so that the amount of water compared to salt will be greater than the amount of water inside the cells (compared to the salt and other solutes inside the cell.) The hypertonic solution will contain more salt so that the amount of water compared to the  salt will be less than the amount of water inside the cells (compared to the salt and other solutes inside the cell.) The isotonic solution will contain an amount of salt that will be similar to the amount of salt and other solutes inside the cells of the celery. Materials: knife measuring cup and spoon two stalks of celery (they should be fresh and firm, not bend like rubber) table salt three containers with lids (or something to cover the containers) to hold the solutions and the celery stalks filtered or soft water, distilled water works best, tap water will work if it the mineral content is not too high (tap water with high mineral content is called â€Å"hard† water) Procedures: 1. cut four pieces of celery that are each two inches long (be sure they are all the same length) 2. make four vertical slices or cuts into the celery but make the cuts only three fourths of the length or 1.5 inches; space the vertical cuts as evenly apart as possible 3. label the three containers A, B and C 4. add one cup of water to each container 5. add NO salt to container â€Å"A† 6. add  ½ teaspoon of salt to container â€Å"B† and stir well 7. add 2 teaspoons of salt to container â€Å"C† and stir well 8. place one of your 2 inch cut pieces of celery into each of the three containers and keep the fourth piece as a control for comparison 9. cover the three containers with the lid or cover that you are using, you could use a cling plastic wrap as well 10. wrap the fourth control celery piece tightly in plastic wrap 11. leave the celery pieces in the three containers and the fourth wrapped (control) piece for 6 hours or overnight at room temperature 12. remove the pieces from the containers and bend them while observing how firm or flexible they are 13. record your observations of each of the four pieces of celery below Observations: Solution Flexibility compared to the control stalk (less flexible, similar, more flexible) More water moved into or out of the cells? Indicate which solution was isotonic, hypotonic, and hypertonic A When the celery stalk was placed in solution A. The water moved through and in the cells of the celery which is an example of osmosis. Water moves through the cells. The stalk was firm and less flexible. More water moved into the celery’s cells. The celery stalk was nice and firm after the allotted time. More water and less to no solute, is an example of hypotonic solution. Which means there is â€Å"less† osmotic pressure. B In solution B the celery became a little more flimsy. Solution has a little salt. Slightly less water moved into the celery’s cells. The reason the water didn’t move as freely through the cells is due to the small amount of solute. This is an example of hypertonic, or greater osmotic pressure. This solution has a higher concentration of solute than the hypotonic solution. C In solution C the salt/ solute is very present. The celery became very flimsy after 4 hours. Even less water moving into cells. The celery became â€Å"very† flexible and very flimsy. The water was not moving through the cells even at a higher rate. This solution is a full example of osmosis. In osmosis the solute is of greater concentration of the solute. The diffusion of pure solvent across a membrane in response to a concentration gradient,

The Leaked Secret to English Essay Outline Discovered

The Leaked Secret to English Essay Outline Discovered English Essay Outline Secrets In the USA, there's a good deal of controversy surrounding the minimal legal drinking age of 21. Low-income areas can entice little businesses as a result of decrease cost of operation, and can grow economically as a consequence of the new jobs, improving the standard of life of the region. It's only feasible to create a synopsis in case you've got familiarity with the area. If you take a close look at research paper outline examples, you will observe we have several tactics to present the most important body. Lies You've Been Told About English Essay Outline A debate can be composed by purdue on-line essays online resume authors. What country would you like to reside in essay. You can rely on the ideal essay help online. Once you get your completed essay, make certain to tell all your friends what a wonderful service it is and what's the perfect place to get cheap essays. Nowadays it's quite difficult to locate a trustworthy essay writing service. There are numerous essay writing services that think they're the very best, and therefore don't be cheated and check the genuine collection of the very best. Get the Scoop on English Essay Outline Before You're Too Late You might also see speech outline. A consistent structure ought to be used in the key headings and the subheadings. Let's look at an excellent case of an outline. It is an impossible task to compose a persuasive research paper without having and very clear outline. The significance of the outline in the research paper is clear. An outline will help to learn the way a student will build other critical sections like Literature Review. By studying various outline samples, you're guaranteed to come up with the ideal research paper outline in virtually no time. Whether you do a very simple research or a complicated one for a larger project, a research outline can help you receive the best outcomes. Finding out how to compose a thorough outline for a research paper is a more complicated course of action. An outline is intended to help you set a structure for a paper you are likely to write. A comprehensive outline is essential for writing a very good research paper. But What About English Essay Outline? It is possible to also Speech Outline Template. A research outline template is readily gettable on the web. Though it might look difficult, as soon as you become familiarized with the rules and format, it is going to become easier. The perfect way to get a comprehension of the APA outline format is to have a look at examples. Completing an MLA outline will make sure your research paper format is accurate. APA format is usually utilized in the social sciences. The Hidden Gem of English Essay Outline There are more than a few reasons, but generally, it could possibly be valuable to make an outline if you want to demonstrate the hierarchical relationship or logical ordering of information. It's possible that you use quotes or paraphrase regions of the text to be able to add evidence. In the event of a lengthier project, it's challenging to imagine a successful writing process with no obstacles in the event the outline is missing. Additionally, among the crucial purposes of an outline is to clearly convey the link between the thesis and every one of the topic sentences. A graduate pa per outline isn't an exception, it must be done following the typical rules known to a lot of students but the primary difference could be in the content that it is going to carry. Example, on types of work that's a written you'll become 1 mistake students to compose a specialist. Every student demands help with homework from time to time. By time to time, even the best students realize it's problematic as the write-up must perhaps not comprise information regarding the topic matter but in addition significant research of selected issues to compose an article that's superb. Thus a sample might enhance the general performance and presentation of the paper which will assist them in future too. In order to start outlining the research paper, determine why you're researching the subject. For research papers, an outline may assist you in keeping an eye on considerable amounts of information. A well-made outline is crucial in locating considerable info and keeping track of conside rable amounts of information from a research paper. Who Else Wants to Learn About English Essay Outline? If you're thinking that you require someone to compose my essay at the moment, you can merely rely on our honest reviews. Employing an outline template can assist the student organize the paper and eliminate the ideas that aren't pertinent to the function of the essay. A systematic approach will definitely assist you to produce a brilliant research paper. The most frequently encountered paper writing service that the majority of our clients require is essay writing.

Definition and Examples of Semantic Entailment

In semantics  and pragmatics, entailment is the principle that under certain conditions the truth of one statement ensures the truth of a second statement. Also called strict implication,  logical consequence, and semantic consequence. The two types of entailment that are the most frequent in language, says  Daniel Vanderveken, are truth conditional and illocutionary entailments. For example, he says, the performative sentence I beg you to help me illocutionary entails the imperative sentence Please, help me! and truth conditionally entails the declarative sentence You can help me (Meaning and Speech Acts: Principles of Language Use, 1990). Commentary [O]ne statement entails another when the second is a logically necessary consequence of the first, as Alan lives in Toronto entails Alan lives in Canada. Note that the relationship of entailment, unlike that of paraphrase, is one-way: it is not the case that Alan lives in Canada entails Alan lives in Toronto. (Laurel J. Brinton, The Structure of Modern English: A Linguistic Introduction. John Benjamins, 2000) [M]any, if not all, assertive sentences (statements, propositions) of a language allow for inferences solely on the basis of their meanings. For example, when I say Ben has been murdered, then anyone who has understood this utterance and accepts its truth will also accept the truth of the statement Ben is dead. (Pieter A. M. Seuren, Western Linguistics: An Historical Introduction. Wiley-Blackwell, 1998) Entailment Relations An entailment can be thought of as a relationship between one sentence or set of sentences, the entailing expressions, and another sentence, what is entailed... We can find countless examples where entailment relations hold between sentences and countless where they do not. The English sentence (14) is normally interpreted so that it entails the sentences in (15) but does not entail those in (16). (14) Lee kissed Kim passionately. (15)a. Lee kissed Kim.b. Kim was kissed by Lee.c. Kim was kissed.d. Lee touched Kim with her lips. (16)a. Lee married Kim.b. Kim kissed Lee.c. Lee kissed Kim many times.d. Lee did not kiss Kim. (Gennaro Chierchia and Sally McConnell-Ginet, Meaning and Grammar: An Introduction to Semantics. MIT Press, 2000) The Challenge of Determining Meaning Semantic entailment is  the task of determining, for example, that the sentence: Wal-Mart defended itself in court today against claims that its female employees were kept out of jobs in management because they are women entails that Wal-Mart was sued for sexual discrimination. Determining whether the meaning of a given text snippet entails that of another or whether they have the same meaning is a fundamental problem in natural language understanding that requires the ability to extract over the inherent syntactic and semantic variability in natural language. This challenge is at the heart of many high-level natural language processing tasks including Question Answering, Information Retrieval and Extraction, Machine Translation, and others that attempt to reason about and capture the meaning of linguistic expressions.Research in natural language processing in the last few years has concentrated on developing resources that provide multiple levels of syntactic and semantic analysis, resolve context sensitive ambiguities, and identify relational structures and abstractions.... (Rodrigo de Salvo Braz et al., An Inference Model for Semantic Entailment in Natural Languages.  Machine Learning Challenges: Evaluating Predictive Uncertainty, Visual Object Classif ication and Recognizing Textual Entailment, ed. by  Joaquin Quià ±onero  Candela et al. Springer, 2006)

The Extraction Of Factors And Factors - 941 Words

The extraction of factors helps to determine the loading of factors. The factor loading matrix is shown below and is estimated with two common factors. The first column of the matrix depicts the first unrotated factor and it can be analysed that the first factor puts maximum and approximately equal weights to the first, second and fifth variable. And, it puts the minimum weight to the third variable, electricity. On the other hand, the second unrotated factor places the least weights to the first and second variable, while putting the highest weight to the third variable. Factor Loadings = Scatter plot of Unrotated Factor Scores The Figure. 15 shows the scatter plot of Score2 vs. Score1. It is clear that the 15th observation has the†¦show more content†¦Selecting an appropriate rotation is difficult task. Hence, it is preferable to perform both rotations on the factors. Varimax rotation technique results in high loading of each variable on a few number of factors, ideally on one factor and hence resulting in better factor analysis. The Figure. 18 shows the biplot of loadings of varimax rotated factors. It can be seen that in order to bring the loadings close to zero or one, varimax has rotated the axes. The four variables are close to first factor axis. While, the third variable lies approximately on second factor axis. Hence, the results of varimax rotation are satisfactory because most of the variables are near to the factor axis. Figure. 17 Promax rotation can be used incase we are not able to obtain the satisfactory and simple set of factors with an orthogonal rotation. The promax rotation allows the factor axes to have an oblique angle between them. The Figure. 19 shown belows depicts the promax rotation. It can be seen that the variables 1, 2 and 5 are close to the first factor axes and third variable is close to the second factor axis. The data is better accomodated in an oblique rotation. The two latent factors can describe variability of buildings and agriculture, which are having high impact on greenhouse gas emissions. Figure. 18 To understand how the rotated and unrotated solutions are related to eachShow MoreRelatedThe Alberta Tar Sands: Factors Affecting Extraction and Production of Fossil Fuels1290 Words   |  5 PagesEarths biggest reserves of fossil fuels, the extraction of these resources is known to cause a variety of social and ecological problems. The extraction process itself is inefficient and the pipeline that has been proposed is subject to many environmental risks. Portions of the pipeline have already been approved and the construction of the pipeline is already begun in some areas. This paper will look at some of the factors associated with tar sands extraction and production of fossil fuels. Introduction Read MoreInformation About Oil And Natural Gas Extraction Industry1373 Words   |  6 Pages Davidson From: Nicolas Hardaway NH Date: September 18, 2014 Subject: Information about Oil and Natural Gas Extraction Industry This Report requested by the principal financial investor, Dr. Maria D. Davidson, includes information required to make an informed decision on whether or not to diversify into the Oil and Natural Gas Extraction industry. The Oil and Natural Gas Extraction industry is involved in the processes required to find and extract crude oil and natural gas. The Oil and NaturalRead MoreEnergy Costs687 Words   |  3 Pagesthe future of energy extraction in terms of costs.it will also look at how technological improvement have impacted energy extraction even in the wake of the depletion of convectional sources. Cost-supply and uncertainty are asymmetrical when it comes to extraction of energy. The cost of energy extraction will determine the supply. The future of energy extraction is quite uncertain since non-renewable energy sources are slowly being depleted. The future of energy extraction is quite uncertain whichRead MoreThe Value Of Kmo For Overall Matrix Essay707 Words   |  3 Pages1 enumerates that the communalities of the selected 36 variables have good reliability and keenly checked that no one variable has low loading, i.e., less than 0.5. Thus finally, the 26 variables are selected for the factor analysis. The appropriateness of the data for the factor analysis is discussed in the following KMO and Bartletts’ test. TABLE 5.2 KMO AND BARTLETT’S TEST Kaiser-Meyer-Olkin Measure of Sampling Adequacy 0.956 Bartlett s Test of Sphericity Approx. Chi-Square 2.098E4 df 630Read MorePRACTICAL REPORT ON THE ISOLATION AND IDENTIFICATION OF CODEINE AND PARACETAMOL1201 Words   |  5 PagesPRACTICAL REPORT ON THE ISOLATION AND IDENTIFICATION OF CODEINE AND PARACETAMOLPRACTICAL REPORT ON THE ISOLATION AND IDENTIFICATION OF CODEINE AND PARACETAMOL AIM: To extract codeine and paracetamol from its tablet by solvent extraction and tentatively identify in comparison to standards using Thin Layer Chromatography. INTRODUCTION: Codeine or methyl morphine, an alkaloid, was first isolated in 1832 from raw opium. It concentration ranges from 0.2% to 0.8%. Mostly used for its analgesic,Read MoreA Brief Note On The Rio Grande Basin991 Words   |  4 Pagesdischarge pollution into this river, with differing pollution standards, some places throughout The Rio Grande is considered out of the boundaries for pollution levels, by US standards. The largest factor for the decline of the Rio Grande is water extraction. â€Å"A high level of water extraction for agriculture and increased domestic use threatens the Rio Grande. Most of the major tributaries and many of the lesser ones support substantial agriculture production.† (wwf2) The water from this riverRead MoreNumber Plate Extraction1345 Words   |  5 PagesIII. NUMBER PLATE EXTRACTION The captured input image has number plate covered by vehicle body, so by this step only number plate area is detected and extracted from whole body of vehicle. The number plate extraction phase influence the accuracy of ANPR system because all further step depend on the accurate extraction of number plate area. The input to this stage is vehicle image and output is a portion of image containing the exact number plate. Number plate can be distinguished by its featuresRead MoreMeasuring Team Work On Health Care Settings1499 Words   |  6 Pages PCA will be done to verify the factor structure of the set of observed variables in the survey (Mavor, Louis, Sibley, 2010; Polit Beck, 2008; Aday Cornelius, 2006). In other words, the PCA will determine the extent to which the generated items cluster into the appropriate factor or subscale for which they were developed. Subscales are: 1. Interprofessional Collaboration; 2. Interprofessional Communication and; 3. Interprofessional Trust. The actual factor analysis will be conducted by usingRead MoreRemoval Of The Lower Impacted Third Molars Case Study1359 Words   |  6 PagesNumerous indications, such as acute or chronic infection, pain, unrestorable carious lesions, pathology associated with tooth follicle or prevention or repair of periodontal defects in adjacent second molars (L2Ms), have been suggested for surgical extraction of 3Ms.(1) A partially impacted L3M exposed to the oral environment is more susceptible to periodontal infection and thus to greater periodontal attachment loss.(2–5) Similarly, deeply impacted L3Ms often leads to periodontal defects after its surgicalRead MoreSubjective Test Assessment Of Online Exams1474 Words   |  6 Pagesnumber of answersheets. Due to which assessment becomes difficult for teachers and causes stress, strain and mental steadiness. By the new initiations in the technology, there are many innovations in natural language processing and information extractions, which constitute specific categories of free-text questions in automated tests that makes scoring now achievable. Advantages of computerized tests scoring comprises of time and price savings, reduces deficiency of steadiness. As compared to objective

Veterans and Ptsd Free Essays

Veterans and PTSD Toni L. Enemy Hunter Psychiatric Rehabilitation/REHA 425 Professor McDermott October 29, 2011 Abstract The United States is seeing an increasing number of Veterans coming back from Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) being diagnosed with Post-Traumatic Stress Disorder (PTSD). We will write a custom essay sample on Veterans and Ptsd or any similar topic only for you Order Now PTSD is affecting the lives of men and women, their family and those closest to them. The goal of this paper is to give some general information for women and their families experiencing PTSD. It will give symptoms and treatment options available to women veterans. Women Vets and PTSD According to the 2009 and 2010 National Survey on Drug Use and Health, Substance Abuse and Mental Health Services Administration (SAMHSA), nearly 600,000 veterans aged 18 or older experienced a co-occurring substance use disorder and mental illness in the past 12 months. Post-Traumatic Stress Disorder (PTSD) is now becoming more prevalent with men and women in the military. How can the families of the veteran better understand what to expect and how to deal with their loved ones suffering from PTSD? Definition According to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR; APA, 2000) the diagnostic criteria for PTSD include a history of exposure to a traumatic event meeting two criteria and symptoms from each of three symptom clusters: intrusive recollections, avoidant/numbing symptoms, and hyper-arousal symptoms (Appendix 2). Challenges The British Medical Journal reported that veterans do not experience trauma or disabling symptoms until they return from the war (Gabriel Neal, 2002). Friedman said PTSD symptoms appear when they return home trying to readjust to civilian life. When a person is on active duty in the military, if one does not have a physical injury then psychological symptoms are seen as a weakness and being a coward (Friedman, 2004). Those that did seek help found it difficult to be diagnosed because they were not exposed to direct combat (i. e. hostile fire, returning fire, or seeing others injured). The veterans that do have PTSD from military trauma are from non-combative events such as sexual trauma. They may feel alone and worry about their families. PTDS is comorbid with traumatic brain injuries and other psychiatric disorders such as depression, social phobia, panic disorder, substance abuse, and mood and anxiety disorders (Feczer, 2009). [W]e deny that war changes its participants forever- †¦America claims innocence and goodness as fundamental traits. We believe that our young men and women should be able to go to war, get the job done, and return home blameless and well. (Tick, 2005) Intervention The Readjustment Counseling Service is available for veterans who served in war zones, Vietnam Era Veterans, veterans that experienced sexual trauma while in the military, and for family members that have lost loved ones while on duty. At a Veteran Center, the services that are provided are: individual counseling, group counseling, marital and family counseling, addiction counseling, benefits assistance and referral, employment referral and counseling, community education, liaison with VA facilities, referral to community agencies, contracts with area counselors and Mobile Vet Center Outreach. The client first has to go through assessments to figure out the best therapeutic approach. They need to be screened for victimization, suicidal potential, addictive behaviors, differential diagnosis, comorbidity, and family assessment (Meichenbaum, 1995). Medications, along with therapy, have been the most helpful types of treatment for PTSD. The medications used are antidepressant medications, anti-anxiety medications, mood stabilizing medications, and other medications to ease nightmares, irritability, sleeplessness, depression, and anxiety (Feczer, 2009). It is important when interviewing the client to find out their childhood history. Many times trauma during childhood will not come out until later in life and it can be the underlying issue to their problems (Feczer, 2009). Therapy Modalities PET After a traumatic event, many individuals experience distress and signs of PTSD. The veteran may experience suffering when dealing with the recollections related to the trauma. This type of therapy helps by approaching those thoughts, feelings, and events that the client has been avoiding because of the stress they cause. By repeated exposure to the emotions it helps the veteran reduce the power thoughts have over the client. However, during the assessment, it is important to discuss with the veteran the main event(s) that causes the stress. By doing this at a comfortable pace, the exposure to that trauma can be dealt with accordingly (Creamer amp; Forbes, 2004). The first part of the therapy is education. The counselor will explain the treatment, the common trauma reactions and symptoms of PTSD. PET helps the veteran understand what the goals are for the treatment and what to expect for the duration of the upcoming sessions. Teaching methods of breathing techniques will help the veteran to relax. Breathing changes when a person becomes anxious or fearful. This is a short-term technique to assist in managing sudden distress. The third aspect of PET is in vivo exposure where the client has exposure to real world situations or events that may be anxiety-producing. This is safely done by approaching the situation that has been avoided because of the stress it causes. PET uses imaginal exposure where the veteran talks through the trauma(s) with the counselor. By talking, it helps the client to gain control over the traumatic events and realize that he or she does not have to be afraid of his or her memories. The overall goal is to work through the events from least to most traumatic events and what is comfortable for the client. This type of therapy is usually eight to fifteen sessions that last about ninety minutes (Resick, Nishith, Weaver, Astin,amp; Feuer, 2002). CPT Many times those with PTSD have problems dealing with their thoughts and memories of the trauma they have been though. They may get â€Å"stuck† in their thoughts and have a hard time making sense of what has happened or is happening to them. CPT helps in giving clients a new way of dealing with their thoughts and to gain an understanding of the events that haunt them. There are four parts to CPT: learning about PTSD symptoms, becoming aware of thoughts and feelings, learning skills and understanding changes in beliefs. CPT requires educating the client about PTSD and what to expect from the disorder. The veterans can ask questions and find out how the skills are going to help them. In this modality, the client needs to become aware of their thoughts and feelings. When bad things happen we want to know why they happen. Clients can get stuck in their thought process and not be able to let it go. However, with CPT a person learns to pay attention to these thoughts that the trauma has caused and discuss how they make one feel. Then he or she can take a step back and see how it affects the person now. This will hopefully help the veteran think of the trauma in a different way. This can be done by writing about it or talking to the counselor. Next, the veterans need to begin learning the skills to help challenge their thoughts and question them as well. This is done by doing worksheets (appendix 1). These worksheets will help veterans decide the way they want to think and feel about their traumatic situations. These skills will eventually help in dealing with every day issues. Finally, there is trying to understand the changes in beliefs. There are common changes that happen after going through a trauma. There are going to be changes in the way a person thinks about safety, trust, control, self-esteem, other people and relationships. By talking about these beliefs, hopefully they can find a balance with the beliefs before and after the trauma. The approximate time for this type of therapy is twelve sessions. EMDR The final type of therapy is Eye Movement Desensitization and Reprocessing or EMDR. Clients that are involved in EMDR use imaginal exposure of their trauma and at the same time the counselor uses their index finger for them to follow back and forth. EMDR therapy seems to directly affect the brain by unlocking the traumatic memories, allowing clients to resolve them. Veterans work through the upsetting memory, beliefs, feelings, sensations until they are able to think about the event without reliving it. The memory is still there, but not as upsetting. It is like detaching oneself and watching a movie but relieving the trauma at the same time (Barton, Smith, Corcoran, 2011). Case Management, Employment and Vocational Rehabilitation According to the Vocational Rehabilitation and Employment Program that Congress prepared, case managers work closely with Vocational Rehabilitation Counselors (VRC) to create a rehabilitation plan. This plan consists of evaluation and planning for the future goals of the veteran. The veteran is evaluated to see if he or she is capable of independent living or will need rehabilitation services. The VRC is responsible to see that referrals for medical, eye care and dental are taken care of for the client. The vocational-education counselor will be able to assist the veteran in acquiring education, training, equipment, and financial aid if the client needs to develop new skills for employment. The President of the United States is also giving great tax breaks to employees for hiring veterans. The Counselor and Support Systems The downfall to helping veterans with PTSD is that there are not many counselors have the experience with this type of client. Counselors in this field are few, especially in the rural and underserved geographic areas. The VA resources are overwhelmed with clients so there is a backlog, which creates frustration with veterans. There are many that have contemplated or have committed suicide because they did not receive the help they needed. According to the National Center for PTSD, some may have had past mental health issues and may not have good support systems in addition to what was mentioned earlier. So that is why it is important to have a good support system and education is essential for the families when the veteran returns home. They will more than likely not be the same person as they were before they were deployed. Conclusion Veterans do so much for the United States citizens and we need to be thankful for the job they do for our freedom. The veterans put their lives in danger so we can live the life as Americans. Veterans deserve the respect and assistance when they return home to us. So it is my opinion that we do our best to ensure they can become productive citizens once again. I would like to be part of that team to assist in helping veterans adjust back into civilian life. I would like to see more citizens do the same by helping the veterans any way possible. Where would the United States be if we did not have such a great military team? References American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders (Revised 4th ed. ). Washington, DC: Author. Feczer, D. A. (2009). Forever changed: Posttraumatic Stress Disorder in female military veterans, A Case Report. Perspectives in Psychiatric Care. Friedman, M. (2004). Acknowledging the psychiatric cost of war. New England Journal of Medicine, pp 351, 75-77. Gabriel, R. A. (2002). Post-traumatic stress disorder or somatic dysfunction after military conflict may hide posttraumatic disorder. British Medical Journal, pp 324, 340-342. Tick, E. (2005). War and the soul: Healing our nation’s veterans from post-traumatic stress disorder. Wheaton, IL: Quest Books. Masson, N. (2010). Mindful Cognitive Processing Worksheet. Retrieved from http://drnataliemasson. com/images/Mindful%20Cognitive%20Processing%20Worksheet. pdf Creamer, M. , Forbes D. (2004). Treatment of Posttraumatic Stress Disorder in Military and Veteran Populations, Psychotherapy: Theory, Research, Practice, Training, (Vol. 41, pp. 388-398). Resick, P. , Nishith, P. , Weaver, T. , Astin, M. , Feuer, C. 2002). A comparison of cognitive-processing therapy with prolonged exposure and a waiting condition for the treatment of chronic posttraumatic stress disorder in female rape victims. Journal of Consulting and Clinical Psychology, (Vol. 70, pp. 867-879). Bartson, S. , Smith. , M. , Corcoran, C. (2011). Help Guide. EMDR Therapy. Retrieved from http://www. helpguide. org/mental/pdf/emdr. pdf Meichenbaum, D. (19 95). A clinical handbook/practical therapist manual for assessing and treating adults with post-traumatic stress disorder (PTSD) book. Florida: Institute Press. Appendix 1 Mindful Cognitive Processing Worksheet 1. Describe situation briefly 2. List emotions (single words) and rate the intensity (0-100%) 3. List automatic thoughts. Circle â€Å"hot thought†. (For deeper work, identify the â€Å"core belief. †) 4. Observe breathing and body sensations. Describe these briefly. 5. Practice acceptance and validation. List thoughts that promote acceptance, non-judgment, validation. Take a few moments to practice breathing in an attitude of allowing things to be as they are without judging or trying to change/fix things. 6. List objective evidence that supports your automatic thoughts. . List objective evidence that counters your automatic thoughts. 8. Identify any distortions involved in your automatic thoughts. 9. Consider a more balanced thought. 10. Describe the outcome. List emotions, rate intensity. List any other reactions, observations. Bonus†¦ 11. Identify any core beliefs that could use revising†¦. and a more adaptive belief. 12. Consider behavioral experiments to disprove the core beliefs and support a new belief. Summary of some common cognitive distortions: 1. Probability overestimations – overestimating the likelihood of a negative event 2. Mind reading – assuming what others will think about you Appendix 1 Cont. 3. Personalization – taking too much responsibility for a negative situation 4. Should statements – incorrect/exaggerated statements about how things should be 5. Catastrophic thinking – assuming that a negative event would be catastrophic 6. All-or-nothing thinking (Black ; White Thinking) 7. Selective attention and memory –attend to negative information, discount positive 8. Overgeneralization – a single event is taken as a sign of a global pattern 9. Fortune telling – predicting the future with absolute certainty 10. Negative core beliefs – negative assumptions about oneself. Taking an event and turning it into a core characteristic. (â€Å"I made a mistake† vs. â€Å"I am a loser†) 11. Emotional reasoning – believing that if you feel as if something is true, that makes it true (Masson, 2010) Appendix 2 DSM-IV-TR criteria for PTSD In 2000, the American Psychiatric Association revised the PTSD diagnostic criteria in the fourth edition of its Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) (1). The diagnostic criteria (A-F) are specified below. Diagnostic criteria for PTSD include a history of exposure to a traumatic event meeting two criteria and symptoms from each of three symptom clusters: intrusive recollections, avoidant/numbing symptoms, and hyper-arousal symptoms. A fifth criterion concerns duration of symptoms and a sixth assesses functioning. Criterion A: stressor The person has been exposed to a traumatic event in which both of the following have been present: 1. The person has experienced, witnessed, or been confronted with an event or events that involve actual or threatened death or serious injury, or a threat to the physical integrity of oneself or others. . The person’s response involved intense fear, helplessness, or horror. Note: in children, it may be expressed instead by disorganized or agitated behavior. Criterion B: intrusive recollection The traumatic event is persistently re-experienced in at least one of the following ways: 1. Recurrent and intrusive distressing recollections of the event, inc luding images, thoughts, or perceptions. Note: in young children, repetitive play may occur in which themes or aspects of the trauma are expressed. 2. Recurrent distressing dreams of the event. Note: in children, there may be frightening dreams without recognizable content 3. Acting or feeling as if the traumatic event were recurring (includes a sense of reliving the experience, illusions, hallucinations, and dissociative flashback episodes, including those that occur upon awakening or when intoxicated). Note: in children, trauma-specific reenactment may occur. 4. Intense psychological distress at exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event. 5. Physiologic reactivity upon exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event Criterion C: avoidant/numbing Persistent avoidance of stimuli associated with the trauma and numbing of general responsiveness (not present before the trauma), as indicated by at least three of the following: 1. Efforts to avoid thoughts, feelings, or conversations associated with the trauma 2. Efforts to avoid activities, places, or people that arouse recollections of the trauma 3. Inability to recall an important aspect of the trauma 4. Markedly diminished interest or participation in significant activities 5. Feeling of detachment or estrangement from others 6. Restricted range of affect (e. g. , unable to have loving feelings) 7. Sense of foreshortened future (e. g. , does not expect to have a career, marriage, children, or a normal life span) Criterion D: hyper-arousal Persistent symptoms of increasing arousal (not present before the trauma), indicated by at least two of the following: 1. Difficulty falling or staying asleep 2. Irritability or outbursts of anger 3. Difficulty concentrating 4. Hyper-vigilance 5. Exaggerated startle response Criterion E: duration Duration of the disturbance (symptoms in B, C, and D) is more than one month. Criterion F: functional significance The disturbance causes clinically significant distress or impairment in social, occupational, or other important areas of functioning. Specify if: Acute: if duration of symptoms is less than three months Chronic: if duration of symptoms is three months or more Specify if: With or without delay onset: Onset of symptoms at least six months after the stressor (American Psychiatric Association, 2000) How to cite Veterans and Ptsd, Papers

Analysis of Death of a Salesman opening stage directions free essay sample

Arthur Miller’s ‘Death of a Salesman’ (1949) opens with an extensive description of the Loman house. Miller uses extremely precise and detailed stage directions, including prop placement, sound and lighting, giving heavy significance to each of these elements and painting an unchangeable picture to ensure that it is preserved in every interpretation of his work. Throughout the opening stage directions of Act 1, despite the structure and tone being very factual, composed of short, clear sentences, Miller hints at underlying themes and messages through a range of stylistic devices, preparing the audience for the play, and setting the scene. As the play is set in Brooklyn, New York some years after the great depression, many references are made already at this early stage to idealism and the American dream; the desperate and yearning vision of many Americans at that time of a better life. This permeating theme becomes apparent formerly even to the introduction of the characters, as the mere scenery and props act as symbolic elements, which reflect this motif. We will write a custom essay sample on Analysis of Death of a Salesman opening stage directions or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Miller however subliminally makes it evident that this dream is purely an illusion, through emblematic phrases in his stage directions such as ‘rising out of reality’ and physical representations, for instance the broken boundaries where ‘characters enter or leave a room by stepping through a wall onto the forestage’ which create an aura of delusion. The first stage directions include a melody played on a flute, ‘telling of grass and trees and the horizon’. This natural imagery encompassing three physical elements accompanied by the soft and harmonious sound, sets a serene tone which is then highly juxtaposed with the following depiction of the house and it’s neighborhood, featured with darkness and hostility. This heavy contrast may be symbolic of the conflict between the dreams to which the individual aspires and the actual harshness of society’s reality. The description of the surrounding cluster of apartment blocks seems almost to have a greater prominence than the house itself, as this is the first thing the audience ‘becomes aware of’. The tall and ‘angular’ silhouette of Manhattan that lies in the backdrop has expressionistic features and surrounds the Loman house in a way that suggests some metaphorical form of oppression or confinement. The ‘glow of orange’ that falls upon the ‘fragile-seeming’ house is personified as ‘angry’, perhaps reflecting the hostile times in which the play is set. This enclosing and intimidating hostility is in part what makes the home appear so fragile, a fragility that may represent weakness in family bonds or equally, weakness in he who represents the house, condemning him immediately to the role of a tragic protagonist. Willy clings to his dreams just as ‘an air of the dream clings to the place’. This idea becomes present again in the description of Linda’s feelings towards her husband and his traits. ‘his massive dreams’ are the source of his tragic nature, dreams that he shares with the rest of society, but that for him become an unhealthy obsession. Willy is cursed with the incessant desire to pursue his dreams ‘to their end’ and these words forebode a fate that unfolds as a result of this fixation. Overall the opening of this play provides the audience with a sense of the themes that will permeate throughout, by cleverly using stage schemes and elements that insinuate profounder significance of what is to come. The audience is hereby prepared for the play and begins to form judgments and predictions shaped around this carefully strategized scenery.