Research Critique Essay Example | Topics and Well Written Essays - 1250 words

Research Critique - Essay ExampleSuggestions and alternatives on how to improve these strengths and weaknesses shall too be considered. The enquiry subject of this critique is relevant to the practice as it evaluates the effects of securing fall prevention policies in hospitals, especially for the elderly and those with limited and compromised mobility. This topic is also relevant as it displays the benefits of a fall prevention program in the hospital with the end hope of securing improved patient outcomes. Critical evaluation The name of the article is clear and very much precise. It is short enough to warrant interest from the reader, but also concise in its description of the research. It also provides the foundations of the research in terms of its variables and clinical setting. It does not however specify the subject respondents for the research, whether they be elderly patients in critical care or those who grow compromised mobility. These lucubrate would have made the ti tle more concise and encompassing. The abstract is adequately written. It clearly provides a condensed version of the contents of the study, noting the research questions, aims, and objectives of the study (Polit and Hungler, 1997). The methods of the study have also been specified in the abstract, including the results and conclusion (Parahoo and Reid, 1988). The abstract is however overly long, made up of more than 250 quarrel. Abstracts should average about 100 to 200 words (Ingham-Broomfield, 2006). The background/introduction of the study clearly identifies the purpose of the article. The authors detail the conceptual basis for the study, while also identifying gaps and health issues in the practice. The aims and objectives of the study were also place in the research, particularly specifying the general direction of the research paper (Parahoo and Reid, 1988). The only weakness which can be seen in the introduction is that not all the indispensable details for the backgroun d of the study are identified in the text instead, they are incorporated into the text for the readers extrapolation. As for the publications review, it is not clearly identified as a distinct part of the research. Instead, it is incorporated and summarized in the introduction. Nevertheless, all the important details for the literature review are contained in that (Polit and Hungler, 1997). Original and primary sources have been used by the authors. The studies included in the literature review detail what is currently known about the research topic, the gaps in the knowledge, the significance of the study, and the position of the study within the current body of knowledge (Polit and Hungler, 1997). A broad understanding of the topic has been made possible through the literature review and the authors were able to use the studies to charter their methodology in their research. The review also assessed the strengths and weaknesses of the methods used in the previous studies and to use such data to guide their research (Burns and Grove, 2001). The other methods were also critiqued in order to analyze their applicability to their current research. In reviewing the researchs literature reviewed, more studies could have been discussed or drawn out in order to provide more support for the study. These studies would have strengthened the research foundation and provided more details to guide the researchers. The human body for the study comparative

Law & Ethics Essay Example | Topics and Well Written Essays - 1750 words

Law & Ethics - Essay ExampleBefore any nanny, whether enrolled or registered can do anything to another individual, in that location are some levelheaded requirements that they need to understand. The first legal issue is consent. Consent refers to permission to do something. Before a nurse does anything to another person or a patient, it is a legal requirement that the other party or patient agrees and gives permission for such an act to be carried out (Larson, 2003). When the nurse does something against the will of the patient, it is considered to be coercion. More often, a dilemma arises when the patient refuses care that the nurse thinks is necessary. However, in such situations, the nursing guidelines indicate that it is still important to find oneself consent from the patient. In other situations where the patient may be mentally incapacitated, the family or the guardians may give the consent on behalf of the patient.Restrain is the other legal requirement and is greatly related to consent (Engberg et al, 2008). Restraint is any action or device that is designed or intended to prevent free tendency of body parts. Some patients require carryt in cases where it may be deemed necessary, such as when the patient gets violent. However, there is a relation between restrain and patient consent. Before the patient is restrained by the nurse using any device or technique, due consideration and consent of the patient must(prenominal) be taken into account. In the Case Study, Mrs. Davis verbally objects to being restrained. Despite this, the registered nurse goes ahead to restrain the patient against her will. This is against the nursing and service delivery guidelines. As a result of the act, Mrs. Davis falls and suffers injuries that later lead to her death. This again leads to another legal issue that relates to patient care. This other legal issue is battery.Battery occurs when somatogenetic harm results due to negligence or unprofessionalism on the si de of the care

Ayurvedic Medicine Essay Example for Free

Ayurvedic Medicine EssayClass name Date Introduction Ayurveda, the ancient Sanskrit word (Ayus/living and Veda/revealed wisdom) comes from the traditions of the ancient Indian sages, also known as Rishis. The word de nones the enlightened noesis of all aspects of optimal, healthy, common living, and longevity and, its followers believe Ayurveda to be a fortress of wisdom (Ninivaggi 2008, xvi).Being that the checkup commit of Ayurveda goes back as far as 6,000 years, 3,000 of those years recorded and verifiable, it is worth inquiring closely why the seemingly successful methodologies and medical practices progress to non been adopted into the Western framework of scientific medicine. Although Ayurvedic methods and its practitioners ar becoming to a greater extent popular in the united States, with the increased interest by North American patients in preventative and holistic treatments, there appears to be a disconnect about these procedures as validated by providers wit hin North America and our corpse of payers (i. . , the insurance agencies).As indicated by the Rocky Mountain Institute of Yoga and Ayurveda website, a Boulder, carbon monoxide gas agency, it was learned that although reimbursements can be found, it often times requires a fantastic system of billing and coding to ensure payment. There atomic number 18 numerous reports and studies being done that show how Ayurvedic medicine is not just an ancient random variable of complementary and alternative medicine, but rather these studies demonstrate the validity for support of the treatments.One example of this would be in cancer treatment, there are herbal tea and traditionalistic medicines that are being studied worldwide to validate their effect on cancer. Alternative and more(prenominal) than than natural antennaes to curing and humansaging cancers are becoming more popular and common. With the existing regulatory policies and perceptions surrounding Complimentary and Alternativ e Medicine in the fall in States, it is my goal to show and provide statistics that leave alone increase consciousness and acceptance of the medical wisdom of Ancient Ayurveda.There will be an investigation and explanation showing how Eastern Indian health care treatments read been scientifically examined and how they can successfully be adopted into the U. S. health care model, via a more global perspective on illness, distemper and the prevention of disease from a health and holistic approach. Review of Literature The following section summarizes the history of Ayurveda, describes major trends and holes found in the existing look, and explores the evidence both supporting and disproving Ayurveda as a viable and proven healthcare strategy. The History of AyurvedaThe concept of Ayurveda was developed sometime around 2500 and 500 BC in India. Ayurveda is rooted in Buddhist and Hindu traditions, but it has been said to connect with Asian medicine (Warrier 2011). Essentially, A yurveda suggests that the bodys ability to heal itself acts done three forces called doshas. These are vata (space and air), pitta (fire and water), and kapha (water and earth) (Yeager 1998). In order to embody a healthy life, these doshas must remain balanced. Typically, Ayurveda is most often used to prevent disease, and has proven beneficial in the treatment of high blood pressure, cholesterin and stress (Yeager 1998).Ayurveda is also helpful in everyday life. Translated, Ayurveda meat science of life. This definition is relevant because the ancient Indian system of health care focuses views of man and his illness evolving from the body and its external factors (Yeager 1998). In the present context, the Ayurvedic system of medicine is becoming more widely accepted. It is practiced in India and also in the more economically evolved countries such(prenominal)(prenominal)(prenominal) as Europe, the United States and Japan (Samy, Pushparaj and Gopalakrishnakone 2008).In the mid-1 990s, The World Health Organization also recognized Ayurveda as a system of sophisticate traditional medicine that involved the mull of life stimulating observation, and fostering scientific research (Berra and Molho 2010). With the existing and evolving global healthcare crisis that is also currently plaguing the United States (U. S. ), one would believe that an affordable, safe and proven health system so globally recognized would have been able to pass at minimum the political campaign of time but, this is not the case.Although the recent decade has brought about many observations that have added to the scientific credentialing of Ayurveda and other forms of Complementary and Alternative Medicine (CAM), there are as yet concerns about the ancient Indian treatment and its scientific validity, this is especially true in the U. S. (Rastogi 2010). Before the recent upsurge of traditional medicine in a global perspective, Ayurveda was persistently criticized for its ambiguity and philosophical tenants incomprehensible to occidental mind (Rastogi 2010, 1).Ayurvedic Research Methods Ayurveda is arguably an under researched topic, as scholarly research did not in truth begin until the 1970s. This stunted research can be separated into three distinct categories the examination of traditional Ayurveda in pre-compound South Asia, the examination of Ayurveda in colonial and post-colonial times in South Asia, and an examination of Ayurvedic practices outside of South Asia (Warrier 2011). The first wave of Ayurvedic research used treatises written in Sanskrit to decipher the origins of Ayurveda.This research helped to have a bun in the oven and understand the Ayurvedic understanding of the body, health and practice, which heavily differed from other representations during that time (Warrier 2011). The second wave of research showed that Ayurvedic practices were encouraged in India until 1835 when British policy changed. When India gained its independence in 1947, t he g all overnment took im in-between steps to standardize Ayurveda however, the practice was still poorly funded. The effects of British colonialism and favoritism for biomedical has been long lasting.Current practices of Ayurveda are much(prenominal) of hybrid between the two medical practices (Warrier 2011). The third wave of research focused on the advent of Ayurveda in the West (the United States and the United Kingdom) etymon in the 1980s. Deepak Chopra and Maharishi Mahesh Yogi are cited as influential individuals who popularized Ayurveda in the West. Although Ayurveda became more popular, it was discounted as a New Age fad. The third wave of research largely avoids discussions of healthcare reform, or conversations on the legitimacy and authenticity of their Ayurveda practice (Warrier 2011).Ayurvedic research presents additional problems. Firstly, Its difficult to conduct double-blind placebo-controlled trials, , because Ayurveda is a holistic system that treats individua ls differently with sixfold methods (Hontz 2004). However, these modern scientific studies often ignore the primary objective of Ayurveda, which is to see patients as individuals in need of unique care. Secondly, the new and emerging research has not been disseminated, and the new textbooks on the practice have not been updated. Because this new wealth of information has not yet made it to professionals or students, it is of little use.Within the study of Ayurveda, numerous scholars are calling for new research methodologies (Baghel 2011). In the past, many studies have focused on the use of the plants and herbs (herbal pharmacology) in Ayurveda. Despite the screening of over 2000 medicinal plants over ten years, no conclusive info emerged. Based on the inconclusive unwrapings, other researchers continued to suggest that Ayurvedic research should address the uses and benefits of plants. This research has led to advances in traditional medicine, such as the use of certain plants w hen modern medicine is unavailable (Baghel 2011).Currently, Ayurvedic research is concerned with altering the research methodologies, separating itself from traditional scientific practices. Another issue with Ayurvedic research is the translation of terminologies. For instance, Vata is not air, Pitta is not fire and Bhasma is not oxide- they have much deeper scientific meaning (Patwardhan 2009). Because Western scientists stag to grasp the full meaning of certain terms, the scientific research of Ayurveda falls short and its reputation has actually been damaged.These failures concerning Ayurvedic research have resulted in certain consequences. Scientists have simply viewed Ayurveda as a means to bolster modern medicine, rather than a unique practice. In addition, eastern Ayurvedic practices have reached a standstill in the midst of the research and implementation controversies. This has severely paralyzed the Ayurvedic educational system, along with its practice (Patwardhan 2009) . Many scholars and practitioners conclude that Ayurveda needs to define itself and establish a general methodology (Baghel 2011).Unless this occurs, Ayurveda will continue to loose momentum. Scholars have suggested adopting a transnational approach to Ayurveda in order to refocus the research. Evaluating Ayurveda from a transnational perspective means looking at, where personnel, ideas, meanings, symbols, products, and practices are constantly crossing boundaries (Warrier 2011). This viewpoint would ideally look at the influence of of local practices on global traditions. The American Healthcare governance Evolution? There is evidence in the U. S. nd throughout the world of a growing demand for alternative healthcare choices, based upon the best practices from alter healthcare models.This demand for options appears to be based on an opinion that any single system of healthcare has its inadequacies and will not be able to bat all contemporary health care needs (Shankar 2010). It is this perhaps this assessment that has brought about the dramatic growth of the Complementary and Alternative movement as soundly as the awareness and evolution of myriad methods of Integrative Medicine (I. M. ) in the last ten to fifteen years.Luckily for proponents and practitioners of Ayurvedic medicine and research, governments and regulatory bodies appear to have also begun to understand the need for varied approaches to health and wellness with the intent that all new models must also establish their safety, quality and efficacy (Shankar 2010). Agencies such as the National Center for Complementary and Alternative Medicine (NCCAM) and The Food and Drug Administration (FDA) are just a few of the institutions in the United States that are starting to provide guidance and policy around C.A. M. and I. M. , which is a positive step because without these policies and approvals, there would be no evolutionary progress some(prenominal) in terms of Ayurveda in delivery in the U . S. Over the past two decades, U. S. mainstream medicine has become more accepting of Ayurveda and other alternative medical practices. A widely quoted study in the New England Journal of Medicine suggests that a third of Americans spend $14 billion a year on alternative medical methods (Perry 1994). Yet much of this coin comes from consumers pockets.Although the interest in alternative medicine has increased in recent years, it is still difficult to find insurance coverage, but some companies are offering group and individual policies (Dharamsi 2011). Although the coverage is substantial, it is not full coverage. The need for insurance companies to alter their plans is becoming more pressing as the prevalence of Ayurveda increases in the U. S. Despite this acceptance, many questions and controversies remain. Doctors in India and the U. S. are concerned with the standardisation of the practice of Ayurveda in the U.S.. In India, practitioners of Ayurveda are requisite to obtain a Bachelor of Ayurvedic Medicine and Surgery (BAMS) degree, which is the equivalent of five and a half years in medical school (Yeager 1998). However, no such lengthy certification exists (or is required) to practice in the United States. This is further problematic because many of the herbs and treatments used in Ayurveda are relatively untested or unregulated. This means that a person seeking Ayurvedic treatment is left with the responsibility to conduct their own research and find a reliable practitioner.In order to mediate this issue, some U. S. medical schools are beginning to offer courses in Ayurveda alike to those seen in India (Swapan 2007). Yet, these courses are seminars and are completed in a matter of days. Ultimately, standardization is also necessary to price services so that they can be covered by insurance conglomerates. Medical scholars are investigating the potential of an compositional medicine (IM) approach (Patwardhan 2009). These same scholars often look to C hina as a successful example of endogenic medicine.China has accomplished this feat by requiring medical students to complete coursework in Western and traditional medicine (Patwardhan 2009). This dualistic approach means that doctors can provide patients with a combination of treatments. A similar situation is arising in India at the Banaras Hindu University where students integrate modern medicine with Ayurveda and Yoga (Patwardhan 2009). However, integration is sometimes difficult because implementation and methodologies have to be developed and hold upon.Further, many risks are involved with integration, including the potential to lose identity conversely, there is the possibility of Ayurveda being overtaken by modern medicine. To be successful in the integrative endeavor, Ayurveda must recognize, respect and maintain the respective identities, philosophies, foundations, methodologies, and strengths of all systems (Patwardhan 2009). Research Approach Form of Knowledge Chronic disease in the United States (U. S. ) is now more of a challenge. The number of Americans suffering from chronic disease has increased rapidly in the past two plus decades, and today 51 percent of the U.S. commonwealth is struggling from conditions such as heart disease, cancer, diabetes, and stroke. Chronic disease in the U. S. is so prevalent that it is largely accepted as a part of everyday life.Unfortunately, conventional Western medicine is largely focused on treating the symptoms of chronic disease and prevention often goes ignored. According to the Centers for Disease Control and Prevention, Chronic diseases such as heart disease, stroke, cancer, diabetes and, arthritis are among the most common, costly and preventable of all health problems in the U. S. Yet, they account for 7 out of 10 deaths or 51% of deaths annually, according to a 2008 report of 2005 mortality data. The Problem. With the traditional Western model of healthcare in America being as financially lucrative a s it has been historically (i. e. , reactive disease processes, hospitalizations, pharmaceuticals, insurance plans) one can only imagine that there is not much of a desire by these money making industries to move toward a model of preventative medicine. It is also less likely that these industries would consider Complementary and AlternativeMedicine (CAM). The proposed research study aims to explore the ancient art of traditional Eastern Indian Ayurvedic medicine, its validity as a scientifically proven means of symptom prevention, daily healthcare regimen, disease curative and whether or not this form of CAM has a current presence in the U. S. or any potential future in our existing healthcare system. Research questions. The research will address the following questions 1. What is the Ayurvedic philosophy of health, healing and medicine? 2.What does Ayurveda in North American U. S. culture consist of? Who are the practitioners? Who are the patients? 3. What does current research sa y about the outcomes of chronic diseases treated with Ayurvedic methods? 4. Are Ayurvedic treatments currently being paid for by U. S. insurance plans, if not, why not? 5. What are the trends with regard to CAM treatments in the American healthcare model? Target Audience The audience for this research and those that will benefit from its findings would be the United States population as a whole.Not only will the current and potential patients of the ancient practice benefit by a growing and increased awareness and expectant change in insurance policy if needed but, current practitioners and those considering the study and certification of Ayurvedic medicine should be relieved and assured of their futures as proven through reports of clinical outcomes and accepted methods of Ayurvedic delivery in Western culture. Controlling Factors Since Ayurveda is a somewhat recent discovery in The United States , the expanse of its historical data originates from India.The majority of its practi tioners and patients are native Eastern Indians and the information found within academic reports can mostly be traced back to organizations hailing from India. Since a determination about the effectiveness and utilization in The United States is the goal of the research, the information may be difficult to localise. The healthcare publications and journals that will report Ayurvedic outcomes will likely be written by Indian physicians based upon Indian lifestyles and dynamics of health within the country of India.I would assume without further research and investigation, that there will be some conflicting if not incomplete and/or possibly biased information being reported. Data Collection Methods A dual approach of qualitative and quantitative research review will be done. I will use the world wide web and other library resources to locate industry white papers and respected journal articles that show specific recordable and scientific data about Ayurvedic deliveries and outcomes , statistics on use and trends, specific to the United States.Since the Boulder, Colorado area is a well-known community of those who seek or practice CAM therapies some information can be obtained by agencies willing to share their experiences, knowledge and clinical data. IRB approval will be required to perform any type of survey or case study that will be use with these approving agencies.

Cash Cropping in Nepal Essay Example for Free

Cash Cropping in Nepal EssayOn an individual crop basis, tomatoes and potatoes were the most increasing, sensitivity analysis and scenarios suggest higher(prenominal) variability and chokeed short-term pretend on poverty alleviation. Profitable. On a per farm basis, 50% of the households with positive farm gross margins grew at least one vegetable crop, slice only 25% of households with negative farm gross margins included vegetable crops in their rotation. Farmers have been hesitant to produce earlier for the market given the rudimentary infrastructure and high variability in prices.Farmers reported selling more crops, but when corrected for inflation, gross revenues declined over time. The cost and benefits of developing markets have been unevenly distributed with small holders unable to capitalize on market opportunities and wealthier farmers engaging in input intensive cash cropping. Farms growing vegetables had an sightly gross margin of US$137 per year compared to U S$12 per year for farms growing only staple crops.However, the area under production is small and, while vegetable production is likely to continue Key words Agriculture, Cash crops, Gross margin, Household economics, Market inequity, Poverty Introduction Cash cropping has been promoted by increase specialists as a mechanism to alleviate rural poverty in countries such as Nepal. Programs have capitalized on existing transportation networks, the proximity to urban centers or niche markets (Panday, 1992). But there are concerns that agricultural commercialization by-passes the poor.The cash and land quality requirements of capital intensive farming may limit the capacity of poorer farmers to invest, while the risks associated with yield and price variability may limit their willingness to participate in commercial production Both the Agricultural Perspective throw (APROSC, 1995) and the ninth National Plan (GON, 1998) of Nepal promote the intensification of ag riculture and increase cash crop production. In the Mid-hills of Nepal near Kathmandu, potato and tomato production have increased dramatically in the last 10 years (Brown and Shrestha, 2000).But, vegetable production is demanding of soil, water, and human resources. A systematic assessment of cash cropping is required to determine the impact on household well-being. The aims of this paper are five-fold 1) to determine the relative advantageousness of vegetable production in the Mid- hills of Nepal 2) to assess the economic impact of incorporating vegetables into the dominant cropping patterns 3) to break the variability between households 4) to assess the impact of fluctuations in price and 5) to evaluate temporal changes in household well-being with the incorporation of vegetable production.Methods The relative profitability of agricultural production between farms provides a mechanism to compare the economic status of farming households with diversified cropping s ystems. An indication of the profitability of each farm base be obtained by computing gross margins, defined as total deceases less total variable costs. Total returns are equal to the range of all crops produced (including crop residues), irrespective of whether the crop is sold. Total variable costs include the purchase of seed, fertilizer, and pesticides hiring oxen and all labor involved in cultivation activities. wear down includes the time spent in planting, irrigation, fertilizing, spraying, weeding, harvesting and transportation and selling and includes the opportunity cost of family labor. The gross margin can thus be viewed as the return to fixed costs (land and livestock) and management. Gross margin analysis, in this context, focuses on production or income with respect to agriculture. As it does not take into account the time value of money, gross margins are not sensitive to interest rates, and are a good first approximation of financial feasibility.

Mesothelial-Mesenchymal Transition (MMT) Mechanism

Mesothelial-Mesenchymal Transition (MMT) MechanismMesothelial prison cells play a vital role in maintaining the structure of peritoneal membrane and peritoneal homeostasis. During long precondition peritoneal dialysis, prolonged exposure of peritoneum membrane to peritoneal dialysis solution causes peritoneal fibrosis. Bioincompatible dialysis fluid causes mesothelial cells to motley uncontrolled mesothelial-to-mesenchymal rebirth triggered by Transforming harvest-festival f minuteor-1, which leads morphological and in operation(p) disruption of membrane. This literature review is ab bulge mechanism of mesothelial -mesenchymal transition (MMT), myofibroblasts and its germ hypothesis, clock genes and their cross relation with electronic organ fibrosis.1.1 Peritoneum anatomyPeritoneum is defined as coast membrane, composed of mesothelial cells maintained by basement membrane and thin bottom of connectedness waver. It consists of two distinct layers of mesothelium, known a s parietal peritoneum and visceral peritoneum. parietal peritoneum controversys the peritoneal cavity and comes from somatic mesoderm of the embryo. Visceral covers the external surface of most abdominal organs and derived from splanchnic mesoderm of the embryo. Peritoneal cavity is effectiveness space between two layers and is comprised of small amount of lubricating fluid, to a fault known as serosal fluid which prevents friction between closely packed organs and allows large-minded travail of them. 1,2 The primary function of peritoneal membrane is to provide support to abdominal organs. It withal acts as passage to their blood vessels, lymph vessels and nerves.Peritoneal cavity is mysterious in number of cells like mesothelial cells, fibroblasts, endothelial cells, adipocytes and immune cells like macrophages, T cells, B cells, mast cells. Along with cells, they contain cytokines and growth factors, like interleukin-1 (IL-1), Transforming growth factor-1 (TGF-1), Fibrobl ast growth factor (FGF), and Hepatocyte growth factor (HGF). All through and through the development surgical operation of peritoneal fibrosis, peritoneal cells will experience changes and more or less of the pro inflammatory factors which act as inducers to induce fibrosis and inflammatory touch ones. In this knowing project, we ar going to focus on mesothelial cells along with Transforming growth factor- (TGF-1), which is considered as main mediator of organ fibrosis development.1.2 Peritoneal Fibrosis ca apply by peritoneal dialysisPeritoneal Dialysis, an alternative to haemodialysis is being utilise ab let out more than three decades ago to treat end symbolize renal disease. During this treatment, PD solution is introduced into the abdomen with the help of tube also known as catheter. This dialysis therapy uses peritoneum membrane as semi-permeable membrane and principle of diffusion, to diffuse ravage from underlying blood vessel into the solution.PD solution is major d rawback of this treatment which contri justes to development of peritoneal fibrosis in patients due to its bioincompatible nature. Long-time exposure to hypertonic environment of PD solution with high glucose concentration, acidic pH, presence of Glucose Degradation Products (GDPs) and Advanced Glycation end-products(AGEs) causing functional and structural alterations in peritoneum membrane. 43Other factor which triggers fibrosis process in peritoneum membrane during dialysis is peritonitis. Peritonitis is inflammation of peritoneum which is caused by infection that flush toilet occur all by using unsterile catheter tube, handling which lead to introduction of micro-organism into abdominal cavity. Interesting seek was done by Troidle and team, where they reported that inflammation caused by Gram-positive bacteria in patient peritoneum be better managed than the one caused by gram-negative. 81Numerous clinical studies carried out to study changes that occur in peritoneum of patie nts affordes peritoneal dialysis. Till date, largest peritoneal biopsies study was carried out by William and colleague on total of 212 subjects, out of which 9 were sane individuals, 48 undergoing hemodialysis, 25 uremic and 130 subject undergoing PD. 44 There submesothelial thickness was measured, also were checked for vasculopathy and general morphological features. For design individuals, submesothelial thickness was 50 m, patients undergoing hemodialysis and uremic patients was 140 m and 150 m respectively and for PD patients, thickness was 270m. Similar thickness of uremic and haemodialysis patients indicates that uremia can cause change in the peritoneal membrane. Value of submesothelial thickness increased to 700 m in long confines PD patients, which directs towards fibrotic response of peritoneal to PD. They were also able to identify vascular changes including increase hyalinization leading to vasculopathy. These findings were confirmed by Plum et al and were able to i dentify link between increasing thickness of submesothelial layer and increasing transport rate of solutes. 451.3 Mesothelial cellphones Structural and Functional PropertiesEven though being mesoderm origin, mesothelial cells possess various characteristics of epithelial cells. Normally, mesothelial cells are squamous, and flattened in morphology. They are rich in cell organelles, microvilli and cilia are present on the surface. While cilia aim to regulate surfactant secretion, microvilli functions to entrap piss and serous exudates in order to guard cell surface from frictional injuries. 5Glycocalyx created by glycosaminoglycan, proteoglycans, and phospholipids surround mesothelial cells and have dual function. They form non-sticky slippery surface which supports intracoelomic movement and also provide protection against scratch.Mesothelial cells are specialized cells which plays key role in peritoneal homeostasis and maintains the integrity of the peritoneal membrane. The criti cal roles of mesothelial cells in peritoneum are to exhaust and synthesize growth factors, cytokines and chemokines in peritoneal cavity by transport of fluid and solute across the membrane. 6Mesothelial cells are considered as cells that are first in line in bodys defense system and they are able to sense and responds to signals within their microenvironment. They actively participate in deposition and clearance of local fibrin in the serosa membrane cavities. After automatic injuries and infections, their fibrinolytic activity is important to prevent and remove any fibrin deposits that may forms. 7 Peritoneal membrane does act as selective perme skill barrier to the channel of plasma proteins due to existence of anionic sites on mesothelial cells which in result provide net negative charge to the peritoneum membrane.In normal conditions, mesothelial cells are identified on its ability to express cell mugs like occludin, claudin-1, ZO-1, Wilms Tumor-1, and E-cadherin. When meso thelial cells undergo Mesothelial-to-mesenchymal transition which we will be explained in detail later they every unable to express them or their level expression shines. Therefore, its important to know about all mesothelial cell scrapes for easy identification within pool of cells.1.3.1 Cell markersCell markers are defined as molecules with distinctive genetic and biochemical characteristic. These cell markers are present in cells and can be either proteins, peptides or carbohydrates and mainly present in the cells. They are used to distinguish between different cell types. Some of cell markers are specific to cell types and some are disease specific. For instance, Cancer antigen 125, calretinin and vimentin are tumor markers that are expressed by tumor cells. Some of mesothelial cells markers are positive while some are negative. Markers like hyalurnon, phospholipids, protein phosphate inhibitors-1 are formed by mesothelial cells itself. Table below shows previously studied mar kers for mesothelial cells and their function.TABLE- Cell Markers for mesothelial cellsMARKERFUNCTIONSOURCE addressAUA1Immunocytochemical marker of epithelial cells clement22CalretininDiagnostic beam of light for HirschsprungPositive marker of mesotheliomaHuman2372Cancer Antigen(CA) 125Tumor markerSpecific marker for mesothelial cell massHuman2473CD44Cancer stem cell markerHuman25CD44HReceptor for hyaluronic acidPositive mesothelial markerHuman2674CytokeratinsEpithelial specific markerExpressed by mesothelial cellsHumanRat2775Cytokeratin 5/6Mesothelioma markerHuman28D2-40Potential diagnostic marker of mesotheliomaHuman29DesminPromising differentiating marker of excited mesothelium from malignant epithelialHuman30E-CadherinCell- cell adhesion markerUsed for differentiating benign reactive mesothelial cellsHuman31HBME-1Negative mesothelial marker in pleuraSensitive mesothelial marker in pleuraHumanHuman3233HyalurnonFormed by Mesothelial cellsPositive mesothelial peritoneal markerHum an34KeratinPresent in extreme amount in mesothelial cellsLow amount or negative in mesotheliomaHumanHuman3536Keratin 7 (K7)Highly expressed by mesothelial cellsHuman37Mcp130Diagnostic tool for mesotheliomaAlso used for ovarian carcinomasHumanRat38ME1/ME2Used for identifying both mesothelioma and normal mesothelial cellsHuman22MesothelinExpressed by both reactive mesothelial cells and epithelioid mesotheliomaHuman39N-CadherinHuman mesenchymal stem cell markerAble to differentiate cardiomyocyteHumanHuman3076PhospholipidsFormed by mesothelial cellsAlso known as positive marker for mesothelial cells in peritoneal fluidHumanHuman3424ProteinPhosphate Inhibitor-1Consider as novel positive marker of mesotheliumMouse40ThrombomodulinPositive, specific and sensitive marker for mesothelial cells.Human28Vimentinhelp in identifying mesothelial origin cellsHuman41Wilms Tumour 1 (Wt1)Marker used for differentiate between benign and epithelioid mesotheliumRegulates transition of mesothelial into myo fibroblastsHumanHuman42772.0 Fibroblasts in peritoneumTo reform injuries in organ and tissues, cell response it in form of fibrosis. Resident fibroblast produces extracellular matrix and collagen. Myofibroblasts are the cells that are produced for carrying out the process of wound healing. In general, myofibroblast are gone through the process of programmed cell death by and by completing healing process. It has been suggested that they become persistence after its mechanism fails and leading to more outturn and contraction of Extracellular matrix (ECM) and collagen causing fibrotic diseases.2.1Myofibroblasts in fibrosisMyofibroblasts are defined as specialized subset of cells, which are considered as the key cells in tissue fibrosis. 9 electron microscopy showed that myofibroblast have disorganized membrane (changes that occur in actin cytoskeleton), showed presence of stress fibers, microfilament bundles and also showed adhesions in the fibroblastic cells of granulation tissue. 10 Further electron microscopy showed the presence of gap junctions which connects myofibroblasts, thus strengthening the idea of resemblance between myofibroblasts and smooth muscular tissue cell. Myofibroblast main functions are wound healing and connective tissue remodeling.2.2 Fibroblast differentiation into MyofibroblastTo study and examine functions of myofibroblast, a series of both in-vivo and in-vitro experiments were carried out by Hinz and Gabbiani. 15 They defined the origin of myofibroblasts as a result of 2 step differentiation of fibroblast process. 78 In initial step, fibroblasts differentiate into proto-myofibroblasts during mechanical stress and results in production of stress fibers which contains cytoplasmic actin. They also function to express and establish cellular fibronectin and are also enable to produce contractile force. Term proto-myofibroblast was given to these activated fibroblasts to differentiate them from inactive fibroblasts which are unable to p roduce contractile force. TGF-1 along with ED-A fibronectin, under mechanical stress boosts further differentiation of proto-myofibroblast into myofibroblast. They are categorized by extensive -smooth muscle actin level of expression and produces stronger contractile force than proto-myofibroblasts. This is also contributing into connective tissue remodeling. Gabbiani and Hinz also stated that unlike dermal wound healing, in pathological wound healing myofibroblasts do not vanish through apoptosis instead they lead to tissue deformation. In fact, contractures triggered by them are recognized characteristic of organ fibrosis. 792.3 Hypothesis surrounding Myofibroblasts originThe origin of Myofibroblasts in fibrotic tissue has been much debated, with disparate findings likely to stem from the range of different fibrotic diseases investigated and the array of technical approaches taken. 11 Most of the proposed theories have different cellular consultations and mechanisms which lead to their origin (Figure 3). introductory studies on dermal fibrosis proposed that mesenchymal-like cells known as pericytes are resident source of myofibroblasts. Immunohistochemistry and double immunofluorescence of patients biopsies showed phenotype link between pericytes and myofibroblasts. 80 It has been described that pericytes can differentiate into osteoblast, adipocytes, and smooth muscle cells. Research carried out by Lin et al., on Col1a1-GFP mice and Humphreys et al., using FoxD1-Cre knock-in mice, both transgenic mice with aim to identify pericytes in genetically labelled renal stroma to suggest that major source of myofibroblasts is pericytes, a contractile cell. 12, 13 A limitation of the aforementioned studies is the lack of lineage tracing strategies and the use of non-specific markers to identify pericytes. Markers such as CD73, PDGFR- (Platelet-derived growth factor receptor- ) and aflutter/glial antigen 2 (NG2) used in these studies are also expressed by resident fibroblasts.Endothelial to mesenchymal transition (EndoMT), similar process to EMT can be an some other potential source myofibroblasts. Study done by Zeisberg on three in low-level mouse models with chronic kidney diseases to study renal fibrosis found that EndoMT may contribute in fibrosis as about 30-50% myofibroblasts were able to express -SMA and fibroblast-specific protein-1(FSP-1) and also endothelial cell markers CD31. 16 This indicates myofibroblasts may originate from endothelial cells. Myofibroblasts may also be derived from bone marrow. An elaborate series of studies carried out by Direkze et al., used molecular staining techniques for the detection of Y chromosome markers in irradiated female mice which were transplanted with male bone marrow. 18 They used skin wounding and paracetamol administration to create selection pressure to encourage engraftment of bone marrow derived myofibroblasts. They were able to identify myofibroblasts in the gut through their ability to e xpress of alpha- smooth muscle actin and their morphologies. These findings are controversial however, as other groups have failed to identify BM derived myofibroblasts.A recent study carried out by Yi Ting Chen et al., did genetic fate mapping of Wilms Tumor-1 positive cells on peritoneal fibrosis models. Fibrosis was induced either by dialysis solution, overexpression of TGF-1, or sodium hypochlorite. 19 Results of this study postures as a challenge to the significance of mesothelial cells as probable source of myofibroblasts. It showed rather than mesothelial cells, underlying submesothelial resident fibroblast give rise to collagen producing myofibroblast. Results of genetic fate mapping of WT1+ mesothelial cells showed that after peritoneal injury, remaining mesothelial cells repair the disrupted peritoneal membrane by contributing to remesothelialization, but do not undergo MMT. While previous studies used Wt-1 as a biomarker and Cre recombinase to trace the fate of mesothelia l cells. This makes it obvious that Chen finding still needs to be confirmed. This study also The last proposed theory for origin of myofibroblast is epithelial-mesenchymal transition.Epithelial-Mesenchymal transition (EMT) is comm and defined as process during which transition to mesenchymal cells, epithelial cells lose their cell-cell adhesion and their polarity. Followed by obtaining mesenchymal markers like FSP 1, HSP47, -SMA and vimentin but loses epithelial markers. 20 Myofibroblasts derived from epithelial cells through EMT proposed theory got strong piece of evidence from immunohistochemical study of peritoneal fibroblasts of continuous ambulatory peritoneal dialysis (CAPD) patients carried out by J-Heffernan et al. 14 Biopsies samples were taken from CAPD patients and divided into four groups normal (I), non CAPD uremic (II), CAPD uremic (III) and non- renal patients with inguinal hernia (IV). Markers like desmin, E-cadherin, cytokeratins, -SMA and also CD34 were analysed f or expression by mesothelial cells and resident fibroblasts. Group I and II did expressed CD34 but no other markers. The reverse pattern was observed in other two groups. Degree of peritoneal fibrosis is connected with loss of CD34 expression. Myofibroblasts appear to originate from both by activations of resident fibroblasts and by mesothelial-to-mesenchymal transition of mesothelial cells.3.0 Mesothelial-Mesenchymal Transition (MMT)Under regular conditions, Mesothelial-to-mesenchymal transition of mesothelial cells is an autoregulated biological process which functions to repair tissues but under uncontrolled situations (Long term Peritoneal dialysis) they can cause Peritoneal fibrosis.3.1 Stages of MMTMesothelial -Mesenchymal Transition (MMT) is similar process to Epithelial Mesenchymal Transition (EMT). Defined as a step-wise and complex process where mesothelial cells undergo modifications in their architecture and molecular functions. 21 48 Simple steps in which process of MM T occurs starts with the downregulation of intracellular adhesion molecules causing loss of microvilli, apical-basal polarity and disrupting intracellular tight junction. These transition undergoing cells adopt front to back polarity, have increased in their migration capacity, morphological changes and are able to express -SMA. The main objective of this process is to repair wounded tissues and also play role in process like migration of cells, inducing neoangiogenesis and production of extracellular matrix.Molecules and signaling pathways that play role of either inducers or blocker during the process of MMT are TGF-1 induced signaling pathways and BMP-7 signaling pathway. They are member of superfamily of growth factors, along with activins/inhibin and growth and differentiation factors (GDFs). Main attention is on growth factors because equilibrium between these factors maintains the epithelial like-phenotypic characteristics of Mesothelial cells and also in acquiring mesenchym al cells characteristics.Studies not only showed that high levels of cyclooxygenase (COX)-2, CTGF and VEGF are expressed by mesothelial cells that undergo MMT. But also that there is connection between expression of these molecules and rate of transport of solute across peritoneal membrane. These molecules are also caught up into fibrotic, angiogenic and also in inflammatory responses. 4950513.2 Cell Signaling PathwaysActivation of TGF- , master molecule in peritoneal fibrosis during Peritoneal Dialysis, starts MMT signalling cascade with activating receptors that triggers smads- dependent (GSK-3, -catenin, Lef-1/Tcf, integrin-linked kinase) and smads-independent signalling (H-Ras/Raf/ERK) pathway. 48525354Smad are intracellular proteins that functions to enchant signals from TGF- to nucleus for gene transcription. Smad dependent signalling pathways activates when TGF- and BMP-7 binds with their respective receptor type II (TGF R-II and BMP R-II respectively). The binding leads to activation of receptors type I of TGF and BMP-7. These receptors type I functions to carry out phosphorylation process. TGF R-I phosphorylates Smad2 and Smad3 in TGF- pathway and Smad1, Smad5 and Smad8 by BMP R-I. These activated Smads forms heterodimers with Smad4. Followed by translocation of these complexes into the nucleus where they function to activate genes involved in either process of MMT and rMMT (Fig. 5) Presence of few other BMP-7 modulators may affect the signalling of BMP-7. Smad dependent signalling pathway of TGF- and BMP-7 are controlled by Smad7 and Smad6 respectively.In case of Smad independent pathway of TGF- and BMP-7 involves a protein kinase TAK1, which functions to regulate processes like transcription and apoptosis. In TGF- signalling pathway, TRAF6 initiates activation of TAK1 which further leads to activation of p38 and MAPK-JNK signalling pathway. Receptor type I of TGF- phosphorylates Shc, which helps in activating MAP kinase ERK1/2 signalling pathway. p 38 pathway act as blocker of mesothelial cells revolution to mesenchymal. Maybe its due to the fact that XIAB, a protein belonging to the family of inhibitor of apoptosis protein helps BMP-7 to activate p38 signalling pathway. TGF- also encourages PI3-K/Akt pathway by inactivating GSK-3, to stabilize -catenin and snail and to activate mTOR. This results in position of -catenin into the nucleus, where they interact with LEF1/TCF, in order to feed into Wnt signalling pathway. They also contribute in the transcription of mesenchymal-related genes. Furthermore, localisation of snail into the nuclear encourages transcriptional repression of E-cadherin and several other adhesion molecules.Smad dependent or independent pathway, both depicts the fact that TGF- plays a key role in developing fibrosis by promoting mesothelial to mesenchymal transition. Another fact is BMP-7 plays role of antagonist to TGF-. uttermost(prenominal) studies has used TGF-1 as their target goal to design therape utic treatment for peritoneal fibrosis. Most of them intend to control TGF-1 activity either via drug or synthetic proteins design specifically for this purpose.3.3 Evidences of Mesothelial-mesenchymal transition (MMT)There are more than enough studies results which clearly supports the process of MMT occurring fibrosis but in 2003, Yanez-Mo et al., promulgated breakthrough in-vitro and in-vivo study where they were able to demonstrated MCs undergoes mesenchymal conversion. 46. Primarily in vitro studies were carried on by isolating mesothelial cells from patients undergoing peritoneal dialysis. These isolated cells were characterized using immunostaining, western blotting, flow cytometry and reverse-transcriptase polymerase range of a function reaction. Mesothelial cells from omentum from healthy persons were used as control and all results were compared. Morphological analysis sample showed varies morphologies ranging from cobblestone like appearing cells to fibroblast like cells . Mixed morphology and non-epithelioid were also observed in few samples. Level of E-cadherin, cytokeratin and vimentin were analyzed for the mesothelial-to-mesenchymal transition in mesothelial cell cultures. Results demonstrated noticeably low level of E-cadherin and cytokeratin expression in both cobblestones like cells and non-epithelioid cell as compared to omentum cell cultures. In non-epithelioid cells, vimentin has high expression level. Expression of snail and E-cadherin in mesothelial cells isolated from effluent and omentum were analyzed by the process of RT-PCR. While in omentum mesothelial cells, showed no presence of snail mRNA but increase in expression of these messenger RNA in effluent derived mesothelial cells. These results were schematic after carrying out in vivo studies of peritoneal biopsy samples.With dual aim of studying anatomical changes in peritoneal membrane and correlating them with functional parameter, Del Peso and team carried out a clinical study. 47 They used peritoneum biopsies taken from thirty-five steady patients which were still taking peritoneum dialysis treatment form last 2 years. They observe loss of mesothelial layer in about 74% patients, fibrosis in 46%, 17% showed presence vasculopathy. With submesothelial cytokeratin staining, 17% showed evidence of EMT. Interestingly, they found that myofibroblasts were present in all patients with EMT but only in 36% without EMT.3.4 Potential therapeutic approaches to reverse MMT (rMMT)Several studies describe therapeutic strategies which are targeting anti-EMT of Mesothelial cells are emerging as promising treatment against fibrosis development. estrogen antagonist is a drug used for treating breast cancer. The tamoxifen is oestrogen receptor and their activity affects action of TGF- 1 has been reported. In year 1991, Clark and team showed noticeable decrease in level of peritoneal fibrosis, when given orally to peritoneal fibrosis patients.Loureiro and team also used this drug to study its effect in early degree of PD induced peritoneal fibrosis. 61 Theyused PD model of mice for in-vivo study and along with that they also did in-vitro study. In vitro studies were carried out with mesothelial cells (MCs) derived from omentum and effluent. Mesothelial cell sample cultures were checked for any change in morphology and also level of E-cadherin expression after treating them with Tamoxifen. For effluent derived MCs, MMT was not reversed by Tamoxifen but some mesenchymal molecules expression was reduced. In mice PD model, they confirmed that MMT and thickness of peritoneal membrane increases parallel. They also observed that Tamoxifen does reduce thickness of peritoneal membrane and improves its function.They also administrated P17 and P144, synthetic peptides that were designed to bind with TGF-1 directly. 62 It has been reported that in organs like liver, heart, skin these peptides have shown strong antifibrotic effect by blocking biological function of TGF-1. dress up morphogenic protein-7 (BMP-7) and Hepatocyte growth factor (HGF), are two molecules that were successfully demonstrated their ability to inhibit and reverse process of Mesothelial to mesenchymal transition and renal fibrosis in animal models by X Y D et al., and Yang et al. 64 65In vitro study carried by Yang and team, where they used histone acetyltransferase inhibitor (HAT) C646 in EMT model of HPMCs. 66 EMT was induced by treating with high glucose. C646 treatment of EMT model, found TGF-1/Smad3 signalling was blocked. This might provide with a novel therapeutic treatment for peritoneal fibrosis.Even though most of the therapeutic studies focused on mesothelial mesenchymal transition process and TGF-1, there are other factors that contributes to loss of functional properties of peritoneum. Thus promotin

Impact of Volcanic Eruptions on Iceland

Impact of Volcanic Eruptions on IcelandMassimo FanaraDescribe the three different grammatical cases of volcanic eruptions that have given rise to rise to Icelands volcanic landforms. on that point are three different types of volcanic eruptions based on the lava texture. These areEffusive eruptions in which lava with low viscosity and settles on the side of the volcano forming gentle slopes. In this type of eruption, gases escape easily and thus there is no explosions due to the build-up of pressure (The Geological Society, 2014).Explosive occur when gas pressure builds up in the volcano until it is released catastrophically. The highlyviscousmagma magma is trapped in the volcano by a blockage, which prevents gases from escaping. As the magma rises towards the start, pressure increases until a weak point in the blocked volcanic crater is found. At this point all the pressure is released in a massive explosion of pyroclastics, volcanic gases and lava (The Geological Society,2014). Mixed Eruptions involving explosions and magma flowsDescribe the characteristics of a thuya. How does this acquire its typical shape?Tuyas are eruptions occurring underneath ice sheets heading in a layer-cake structure with a flat-top and steep-sidedvolcano. This steep sided layer-cake shape results from the rapid cooling of lava which does not survive far from the vent and thus piles up into a steep-sided mount. When the eruption is long enough that melts all the ice, a flat cap of basaltic sway on top of the hill is formed.Definethe term jkulhlaup and explain its significance to Iceland.Jkulhlaups refers to an outburst flood event of glacial origin. Jkulhlaups erode, deposit, and re-work sediment simultaneously they usually cause significant glaciological and sedimentological impacts creating large canyons and transport sediment and icebergs over vast outwash plains and sandur deltas (Russell, Roberts, et al., 2005). Another important aspect of jokulhlaups is the significant h eat ex transmit among the magma and glacier, which result in subglacial eruprions and formation of hyaloclastite ridges and tuyas (Bjrnsson, 2010).What are the origins of Icelandic river waters? Describe the relevant main characteristics.Most of the Icelandic river waters originate from abundant glacier melting. This result in distinctive characteristics includingHuge amount of debrisHigh turbidityUsually yellowish-brown in colour.The maximum discharge usually occurs in July or archaean August.Most of the rivers are unnavigable.excusethe following terms (i) tephrachronology, (ii) crytotephra,and (iii) isopachs.Tephrochronology is a method for relating and dating geological, palaeoecological, palaeoclimatic, or archaeological sequences or events (Lowe, 2011).Crytotephra It involves the use of volcanic ash which travelled long distances and which may have formed distinct but invisible layers within a sites stratigraphy (Lane, Cullen, et al., 2014).Isopachs Isopachs are line drawn o n a social function connecting all points of equal thickness of a particular geologic formation. These allow the user to create isopach mapsillustrating variations in thickness within a layer orstratum. Isopach maps are used are utilized inhydrographic survey,stratigraphy,sedimentology,structuralgeology,petroleum geologyandvolcanology.One flier used totackle the problem ofsoil erosion is re-seeding with appropriate floral species. What characteristics of a plant would make it suitable for much(pre titular) a purpose?Roots are important structures not only for the plant but also for the underlying terrain. Plant rootsDescribe 1 method that could be used to measure the profile of a beach.Beach profiling can be carried out by the use of a clinometer. This method consist of first, finding two points to use as persona points which define the line to follow when measuring a beach profile. The instruments needed are a clinometer, a compass, GPS (for the starting point coordinates), a measuring tape and a piece of wood (to place the clinometer on it when taking the readings). Measurements of the beach surface are taken by the use of a clinometer which measures the angle of the slope. This is done at different intervals between the two reference points until the sea is reached. let off the following (i) lateral moraine, (ii) kettle lake, and (iii) outwash plain.Lateral moraine Unconsolidated material deposited on the sides of an alpine glacier. Most of the material deposited results from the freeze-thaw weathering of alpine valley walls (Lemke, 2010).Kettle lake Kettles arefluvioglacial landforms created when depressions left rear end by the melting of partially-buried ice blocks are filled with water (Schaetzl, n.d.).Outwash plain Outwash plains areplainsformed fromglacialsediments such as gravel, sand and claydeposited by meltwater outwash at the terminus of aglacier (The Geography Site, 2006).Explain the presence of wave-cut platforms in areas ofIceland presen tly distant from the coast.Studies were carried out on the lithostratigraphy and biostratigraphy in the northern coast of Iceland in the attempt of reconstructing deglaciations relative sea level changes. correspond to these studies sea level felt by approximately 45m between 11300 and 9100 BP. This corresponds to an isostatic rebound of 77m. Therefore, this change in sea level explains the presence of wave-cut platforms distant from the coast (Rundgren, Ingolfsson, 1997) happen upon between mafic and felsic lava.Mafic lava is less viscous than felsic lava due to lower silica content. This causes non-violent eruptions where lava moves slower. Mafic lava tends to be associated more with interplate volcanism and mid-ocean ridges and produces basaltic type rock.Felsic lava found mainly at convergent zones. This type of lava has a high silica and water content, causing the lava to be highly viscous and causes very violent eruptions. This lava produces rhyolite and andesitic rocks.What is the nominal fix accuracy of a GPS? wherefore can a DGPS improve this nominal accuracy?Nominal fix accuracy of a GPS is how unblemished a GPS can be. There are several(prenominal) factors affecting the accuracy such as atmospheric effects, sky blockage, and receiver quality. A higher accuracy is attained when using GPS in combination with augmentation system. These modify real-time positioning to within a few centimeters (National Coordination Office for Space-Based Positioning, Navigation, and Timing, 2014).A Differential Global Positioning System(DGPS) is an enhancement toGlobal Positioning Systemthat provides improved location accuracy, from the 15-meter nominal GPS accuracy to about 10 cm in case of the best implementations. The DGPS is a combination of local land stations connected with satellites for more accurate data.In cartographic terms, explain why the datum used by a GPS navigation set must be the same as for the reference chart being used. A datum is any numerical or geometrical quantity serving as a reference point from which to measure other quantities. With regard to chart datums, these are also used in plotting GPS positions or transferring positions from one chart to another. When plotting and transferring points from one chart to another GPS positions must be on the same datum as the chart being used in order to prevent any inconvenience regarding with hazards and safe distances.ReferencesBjrnsson, H. (2010). Jkulhlaups in Iceland Sources, release and drainage Abstract.CRITSITE. (2014). Root structure characteristics. Retrieved, 2014, Retrieved from http//www.critsite.com/index.cfm/fuseaction/plants.rootStructures/index.htmHofmann-Wellenhof, B., Lichtenegger, H., Wasle, E. (2007). GNSSglobal navigation satellite systems GPS, GLONASS, galileo, and more Springer.Lemke. (2010). Lateral moraine. Retrieved, 2014, Retrieved from http//www4.uwsp.edu/geo/faculty/lemke/alpine_glacial_glossary/landforms/lateralmoraine.htmlLane, C. S., Cullen, V. , White, D., Bramham-Law, C., Smith, V. (2014). Cryptotephra as a dating and correlation puppet in archaeology. Journal of Archaeological Science, 42, 42-50.Lowe, D. J. (2011). Tephrochronology and its application A review. Quaternary Geochronology, 6(2), 107-153.National Coordination Office for Space-Based Positioning, Navigation, and Timing. (2014). GPS accuracy. Retrieved, 2014, Retrieved from http//www.gps.gov/systems/gps/performance/accuracy/Schaetzl. (n.d.). Kettle lakes. Retrieved, 2014, Retrieved from http//web2.geo.msu.edu/geogmich/kettle_lakes.htmlRUNDGREN, M., INGLFSSON, ., BJRCK, S., Jiang, H., Haflidason, H. (1997). Dynamic sealevel change during the last deglaciation of northern Iceland. Boreas, 26(3), 201-215.Russell AJ, Roberts MJ, Fay H, Marren PM, Cassidy NJ, Tweed FS, Harris T. (2005). Icelandic jkulhlaup impacts Implications for ice-sheet hydrology, sediment transfer and geomorphology. Geomorphology, 75(12), 33-36. doi10.1016/j.geomorph.2005.05.018The Geograph y Site. (2006). Outwash plains. Retrieved, 2014, Retrieved from http//www.geography-site.co.uk/pages/physical/glaciers/outw.htmlThe Geological Society. (2014). Effusive explosive eruptions. Retrieved, 2014, Retrieved from http//www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3599.html

Critical analysis on Philip Larkin

Critical analysis on Philip LarkinThe poem The Trees by Philip Larkin deals with the reflective descriptions of the speakers ceremonial of channelizes. Despite its misleading superficial simplicity, the poem bears a deeper meaning underneath the trees that are reborn every year symbolize reformation and hope in the face of the human race who have to face demise eventuall(a)y. Yet, throughout the poem, Larkin ambivalently mulls about this symbolism, as he delightedly views the picture of the maturation trees only when denies the immortality of their youth as a superficial veneer marked by the inward aging and an eventual death. The poem is in a strictly regular metrical and rhyme structure, arranged into 3 incompatible stanzas, each one four lines long. Such regularity of structure is reflective of the natures cycling of birth, growth and successor. The Trees demonstrates the transience of youth as a result of the destructive passage of time, one of the recurring themes of Larkins works.In the introductory stanza, through the portrayal of the burgeoning trees as both cheerful and melancholy, Larkin purposefully reveals the nonsense of life. Larkin illustrates the trees as coming into sky. The speaker deploys the diction leaf as a symbol of life and conveys a positive, hopeful con nonation. Through this physical depiction, Larkin establishes an image of fresh, growing trees, and sets a witticism of liveliness in the scene. Larkin barely strengthens this lively mood as he describes the comforting view of recent buds that relax and spread. The poet cleverly deploys sibilance to in nucleus evoke the sound of rustling tree leaves, signifying life and youth. Hence, Larkin further emphasizes the vivacious image of the bustling trees, and enhances the encouraging, hopeful atmosphere. Through the deliberate choice of verbs relax and spread, Larkin personifies the leaves and uses trees as a metaphor for humans, comparing their stage of youth to a humans e ntering of a new stage in life. Such comparison amidst the trees and humans implies that Larkin is contemplative about the cheerful, comforting inwardness of hope that trees give to humans. The speakers use of trees as a consolation to humans can also be found in his other poem Forget What Did where the natural and celestial recurrences appear as consolation in the face of individual sufferings. However, immediately afterwards such use of metaphor, Larkin repudiates that their greenness is a kind of grief. Larkin deploys the alliteration greenness and grief to highlight that such beauty of life is a grief because it is nevertheless ephemeral. The negative connotation conveyed by the diction grief suggests Larkins abrupt shift of tone from optimism to pessimism. Furthermore, Larkin deliberately deploys the noun grief to create a rhyming couplet of leaf in the first line and grief in the last line of stanza. This rhyming couplet effectively channels the two distinct connotations of positivity and pessimism, further play up the speakers ambivalence. Additionally, as the speaker compares the growth of trees to some function almost being said, the repeated use of ambiguous diction such as something and almost signifies the speakers state of two different minds. Through the rife tone of ambivalence, Larkin underscores such greenness of nature that seems so cheerful is no less cursory than human life and effectively conveys that all life has an end.In the second stanza, Larkin underscores that trees that outwardly seem perpetually young, in fact, age and eventually have to die, demonstrating the theme of inevitability of death. Larkin questions the immortality of trees in comparison to the transitory lives of humans, as he asks is it that they are born again// and we grow old?. Through the deployment of the diction born again signifying fresh renewal, and of diction grow old signifying death, Larkin reveals the theme of contrast between youth and age. The sp eaker deliberately utilizes the punctuation of question mark to reveal his pensive tone that effectively causes the lecturer to ponder about what life really means to the reader and even to look back at all the time this reader had robotically spent in his life. today following the question however, Larkin denies, No, trees die too, commenting that the lives of trees are no less transient than those of humans. Larkin utilizes caesura to effectively highlight that his thought about trees endless youth is immediately get the better of by his realization that trees do eventually die as well as humans. This caesura underscores his abrupt wavering of tone from speculative to pessimistic, and further emphasizes the ambiguous mood of the poem. It is through this predominant ambiguity of the poem that Larkin reflects the opaque meaning of life in his perspective. Additionally, Larkin compares the trees renewed youth every summer to a yearly jest of looking new. The speakers deployment o f diction trick connotes that all the hope and consolation one may get from viewing the trees vivacious coming into leaf are a superficial veneer. This diction further suggests a negative connotation in the speakers voice, and builds his pessimistic tone that shows his desultory, hopeless attitude towards revitalizing into having a more meaty life. Through the word choice rings of grain, Larkin implies that despite the fresh outer appearances, the trees are growing old inside, as they leave traces in the trunk, underscoring the theme of contrast between youth and age. The reader can also interpret this expression of the poet in a different way the speaker is using the trees as a metaphor for humans. As trees outwardly seem lively but inwardly grow old and die in the end, the speaker is mockingly comparing this to the humans efforts to renew their lives by using various ornate luxuries or by going to prestigious colleges or workplaces, even though eventually the only thing that rema ins after time passes is their death. Through such pessimistic tone, Larkin hints that death is inevitable and therefore underlines his melancholy attitude towards life that is seemingly full of opportunities but is fundamentally ephemeral and meaningless. This theme of inevitability of death also plays a significant role in the poem Dockery and Son. In Dockery and Son, Larkin conveys that no matter what Dockery does in his life, whether getting married or having a son, and no matter what Larkin himself does in his life, whether eating an awful pie or sleeping, life is first boredom, then fear. Whether or not we use it, it goes. This poem The Trees reflects Larkins similar idea that life eventually has an end and thus is pointless.In the final stanza, Larkin expresses his admiration for the trees that indefatigably strive for a renewal in contrast to his own resignation to reach for a revival in life. Marked by the use of the transition word yet still, implying a change of tone from pessimism to a more positive one, Larkin compares the trees with unresting castles. The speaker uses this metaphor to create an image of masculine, firm trees, like castle turrets. This image of adamant trees is further developed by the speakers deployment of diction full-grown thickness. Larkin creates this image to suggest his new tone of distant admiration towards the trees that tenaciously repeat the cycle of birth, aging and renewal every year. Yet, his constant wavering of tone between pessimism and hopefulness greatly contrasts the image of adamant, unwavering trees. Moreover, Larkin depicts the trees as alive with speech, as they seem to say to him about something. Larkin personifies the trees through the diction say and further emphasizes this personification through the deployment of sibilance. The personification of the trees serves to create the effect of aliveness and joviality of the trees. Additionally, Larkins repetition of the onomatopoeia afresh further enhances t he sound of tree leaves bustling and rustling by the wind, thereby signifying life. Through this onomatopoeia, Larkin evokes images of nature and hope. This imagery is symbolic of the trees continuous, unwavering life and renewal. This last line of the poem is a message that Larkin gets from trees to leave the past behind and begin a new life with hope. And yet, the reader can infer from the dominant tone of ambivalence that the speaker is hesitant to act upon this message from nature. Larkin cleverly uses no enjambments at the end of each stanza but instead ends each with a period. The speakers use of this punctuation effectively reflects the predominant message of the poem that even though nature repeats in cycle, there is an end eventually, underscoring the theme of inevitability of death.In conclusion, Larkin purposefully expresses his reluctance towards life, which is meaningless to him. He ambiguously conveys that trees that appear to be young, hopeful and consoling to human eyes, are in fact just as equally mortal as humans. From his ambivalence, Larkin conveys that death after life is inevitable, showing his negligence of the trees cheerful message to begin his life afresh. As an analyzer of this poem, the reader feels differently from the way Larkin feels from viewing the trees the reader feels from it joy and affirmation, and even motivation to try harder in all he does, as nature and its serene views are what he tends to turn to rely on when faced with dilemma. Yet, the reader feels melancholy when faced with the fact that such feelings are vain after death indeed, as Alun R. Jones states in his critical notes on Larkins works, the effect of Larkins writing is akin to that achieved at times by Mozart and Schubert at their most tender and poignant.