Macro Environment of an Organization Essay Example

Macro Environment of an Organization Paper Definition of factors of the macro environment of an organization: Social cultural The coloratura component is concerned with societal and cultural factors such as values, attitudes, trends, traditions, lifestyles, beliefs, tastes, and patterns of behavior. In accordance of the current situation faced by Parkway Nursing Care, one of the social cultural factors is the childcare commitment that the staffs (mostly those licensed practical nurse and orderlies) needed since a lot of them are single parents or the primary care giver of their children. Its been a common sense for American parents to prioritize the education and close monitor of their children. The incapability and restriction of taking time off and lack of manpower contingency plan during the needs for childcare will only raise the stress and demoralize them. As further impact, this situation will reduce the nursing quality performed by the affected personnel. Political/Legal The basic understanding of the political legal environment is when the government implements laws and or regulations which affect the way a business operate. (http://wick. Answers. Com/Q/ Definition_of_political_legal_environment, Answers . Com, 8 JUNE,2013) The political/legal component mainly looks at federal, state, and local laws, as ell as other countries laws and global laws. It also includes a countrys political conditions and stability. One of the critical government factors that may directly give the impact to the profitability of Parkway Nursing Care is the attempt of the federal gov ernment to trim Medicare expense; this may lead to reduction in funding. We will write a custom essay sample on Macro Environment of an Organization specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Macro Environment of an Organization specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Macro Environment of an Organization specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Another government regulation that affect the daily operation procedure for Parkway Nursing Home is the healthcare reporting system which is required to be made in a form that cannot be altered after the fact, to prevent covering abuse, so specialized software system must be used for electronic accumulation which could be antipathy by the older caregivers. Global The global component encompasses issues associated with globalization and a world economy. Globalization consist of aspect and issue in global business organization, global economic, global coloratura and the global workforce. Globalization, then, describes a trend towards the increasing interconnectedness of social relations across the globe. As a worldwide process it embraces both the structural economic linkages associated with rising levels of trade, finance, and investment, the political and cultural influences of transnational actors and international institutions, and the impact of their ideas on domestic policy. ( h ttp://www. Answers. Com/topic/ globalization-4#ixzz2Vd4aWqme , Answer. Mom,JUNE,2013 ) Nursing care nowadays had become global concern and attending patients from different cultural background had become one of the challenges for the nursing staff. The society also tends to compare the nursing quality and price word wide, this is also causing more challenge in nursing industry as more and more county can provide high quality of nursing services with cheaper investment. One way that Parkway Nursing Care can choose to lower the operation cost is to employ workforce from foreign country which is cheaper and more willing to work long hours. Another option is to outsource the training programmer for the workforce to country that can provide low operational cost. Economy The economic component encompasses factors such as interest rates, inflation, changes in disposable income, stock market fluctuations, and business cycle stages. Another economic factor is the continuous change for past few decades in American work structure which is the shift from manufacturing economy to arrive economy. This will only lead to the increase in demand and challenge for the nursing sector. Figure 2: Increase in the service economy in USA. The negative side of the increase in service sectors in America is decrease in manufacturing economies will cause decrease of middle class jobs. Manufacturing sector is also can create more jobs compare to service sector. High income gap between low/average class people in service sector is not healthy. Demographical The demographic component includes trends in population characteristics such as age, race, gender, education level, geographic location, income, and Emily composition. As member of baby boomers become senior citizens, the need of skilled nursing care can only be increased. With more patients nowadays also come with higher educational background, more skilled nursing work force will be needed. Grooming process for the leaders in this industry must be consistent to maintain the competency in service quality. When come to decision making on choosing the location to establish new nursing house, it was advised to choose the location that is away from polluted environment such as industrial factory. Technological The technological component focuses on scientific and industrial innovations. Before extensive application of technology, nurses relied heavily on their senses of sight, touch, smell, and hearing to monitor patient status and to detect changes. It is common believe that technology can provide more efficiency, quality and safety; all of this benefit can give more satisfaction to the patients. It is thousands type of high tech health care equipment and device provided by manufacturer around the world. Without proper knowledge of handling, it may also cause errors and adverse event. Thats why technology must come with a proper training.

Chronic inflammatory disease Essays

Chronic inflammatory disease Essays Chronic inflammatory disease Essay Chronic inflammatory disease Essay Ulcerative Colitis Fatma Otman ( 09003295 ) cellular pathology Ulcerative inflammatory bowel disease is an idiopathic chronic inflammatory disease of the rectum and the colon that follows a class of backsliding and remittal. It is an inflammatory intestine disease, which is characterized by mucosal redness with crypt abscesses, ulcers and pseudopolyp formation. The chronic redness is limited to mucosa, sometime that is extended to submucosa. Ulcerative inflammatory bowel disease is a status that starts at the rectum and ends at some point in the colon. The affected country is uninterrupted ; there is no country of normal tissues between the affected countries. It is erstwhile definite diagnosing of ulcerative or Crohn s can be established in which instance the term an indeterminate inflammatory bowel disease is used. Epidemiology Ulcerative inflammatory bowel disease affects about 1 in 1000 people in the Western universe. First battalion incidence between the age of 10-40 twelvemonth s, but may impact people of any age and 2nd extremum incidence at norm of 60 twelvemonth s ( Bimodal distribution ) . The disease affects females and males. The geographic distribution of ulcerative inflammatory bowel disease is the highest incidence in The United Status, Canada, The United Kingdom. Higher incidence is seen in northern locations compared to southern locations in Europe and the United Status. The prevalence of ulcerative inflammatory bowel disease is greater among Ashkenazi Jews and decreases increasingly in other individual of Judaic descent, non-Jewish Caucasians, Africans, Hispanics and Asians, because familial susceptibleness is a factor associated with ulcerative colitis.. Mortality The consequence of ulcerative inflammatory bowel disease on mortality is ill-defined. Some surveies confirm that, mortality of patient with ulcerative inflammatory bowel disease is merely 12 % ( Viscido et al, 2001 ) . Although, mortality from ulcerative inflammatory bowel disease is decreased during the past 50 twelvemonth s ( Sonnenbery,2007 ) . Therefore, it is thought that the disease chiefly affects quality of life non life span. Causes and hazard factors Causes of ulcerative inflammatory bowel disease is still unknown. There are many factors including: Familial factors proposing that the disease arise from combination of multiple cistrons abnormalcies, for illustration p35 cistron mutation,15 % increased hazard in 1st degree relation ( Medicine, 2010 ) . Environmental factors include the undermentioned: First, diet has been hypothesized to play function in pathogenesis of ulcerative inflammatory bowel disease, for illustration a diet with low in dietetic fiber may impact ulcerative inflammatory bowel disease incidence. Second, chest eating has been reported of protection in development of inflammatory intestine disease ( Klement et al. , 2004 ) . Auto immune disease, some beginnings list ulcerative inflammatory bowel disease as an autoimmune disease couple to malfunction of the immune system ( Odze, 2003 ) . However, surgical remotion of the big bowel frequently cures the disease, including the manifestation outside the digested system. This suggest that the cause of the disease is in colon itself and non in the immune system or some other portion of organic structure ( e Medicine, 2009 ) . Alternate theories proposing that the symptoms of the disease may be caused by toxic consequence of H sulfide in the bowel in patient with ulcerative inflammatory bowel disease. It may be caused by occlusion of in the capillaries of sub epithelial liner, and infiltration of the lamina propria with plasma cells. Appendectomy prior to age 20 for appendicitis and baccy usage both are protective against development of ulcerative inflammatory bowel disease. Psychological factors and socioeconomic factors, clinical aggravation has been found to be facilitated by life emphasis in ulcerative inflammatory bowel disease ( Novack et al. , 2006 ) Types of ulcerative inflammatory bowel disease The different types of ulcerative inflammatory bowel disease are classified harmonizing to the location and extent of redness. Ulcerative proctitis refers to inflammation that is limited to the rectum ( Rectal hemorrhage ) . Procoto-sigmoiditis involves redness of the rectum and sigmoid colon ( Rectal hemorrhage ) . Left side inflammatory bowel disease involves redness that starts at rectum and extends up the left colon ( Bloody diarrhea, venters cramp, weight loss ) . Pancolitis refers to inflammation impacting the full colon ( Bloody diarrhea, abdominal hurting, weight loss, febrility and dark perspiration ) . Fulminated inflammatory bowel disease is rare, nevertheless it is terrible signifier of pancolitis ( Dehydration, terrible abdominal hurting, bloody diarrhoea and daze. They are at hazard of developing toxic megacolon ( Marked dilation of colon couple to severe redness ) , ensuing in colon rupture ( Perforation, peritoneal inflammation, abscesses and monolithic bleeding ) . Ulcerative inflammatory bowel disease is divided into four phases harmonizing to gross pathology Acute phase is involved mucosal surface, which is wet and glowering from blood and mucous secretion, frequently is associated with petechial bleeding. Chronic phase shows assorted sized of irregular ulcers and elevated sessile ruddy nodules ( pseudopolyps ) .In this phase raise intuition of carcinoma ( 1 % of all colorectal carcinoma ) . More advanced phase is involved full intestine, shows fibrotic, narrowed and shortened. Quiescent phase shows no ulceration, but the mucous membrane shows wasting or sometimes appears grossly normal. It may be extended submucosal fat deposition. Intestinal symptoms The most common symptoms of ulcerative inflammatory bowel disease are bloody diarrhoeal and abdominal hurting. Patient besides may see anemia, weariness, weight loss, loss of appetency, rectal hemorrhage, loss of organic structure fluid and nutrition. Extra-intestinal symptoms These include the undermentioned: aphtous ulcer of oral cavity, oculus disease ( Iritis or uveitis ) , arthritis ( ancylosing spondylitis ) , erythema nodosum, deep venous thrombosis, autoimmune hemolytic anemia, clubbing and primary sclerosing cholangitis. Differentiation diagnosing Crohn s disease, morbific inflammatory bowel disease, *pseudomembranuos inflammatory bowel disease, ischaemic inflammatory bowel disease ( aged people ) , TB, colorectal glandular cancer. Everyday probe The initial diagnostic workup for ulcerative inflammatory bowel disease includes the followers. A complete blood count is done to look into anemia ( iron lack anemia ) , which is hypochromic microcytic anemia ( low MCH, low MCV, low hemoglobin ) . Elevated of white blood cells, it is more than normal scope ( 4.300-10.800 cells/cmm ) . Thrombocytosis is high thrombocytes count, it is more than normal scope ( 150-400x 10/ L ) . Erythrocyte deposit rate is elevated = ( = 18 mm/ hour ) . C-reactive protein is acute stage protein that is produced by liver during redness. It is elevated= ( = 10mg/l ) . Electrolytes analysis and nephritic map trial are done, because chronic diarrhoea may be associated with hypokalemia, hypomagnesaemia and pre nephritic failure. Liver map trials are performed to test for bile canal engagement. Stool civilization to except parasites and morbific causes. Diagnostic processs for ulcerative inflammatory bowel disease There are include the undermentioned. Endoscopy and biopsies The best trial for diagnosing of ulcerative inflammatory bowel disease remains endoscopy. Full colonoscopy is extended from anus to the cecum, besides entry into terminal ileum is attempted merely if diagnosing of ulcerative inflammatory bowel disease is ill-defined and to distinguish between ulcerative inflammatory bowel disease and Crohn s disease, because in some instances of ulcerative inflammatory bowel disease may be involve terminal ileum. Endoscopic happening in ulcerative inflammatory bowel disease include the undermentioned: loss of vascular visual aspect of the colon, erythematic or inflammation of the mucous membrane and crumbliness of the mucous membrane, superficial ulceration and pesudopolyps. Biopsies of mucous membrane are taken from different parts of colon to definitively diagnosing of ulcerative inflammatory bowel disease and differentiated from Crohn s disease. The histology happening in ulcerative inflammatory bowel disease typically involves deformation of crypt architecture, redness of crypts ( cryptitis ) , blunt crypt abscesses, bleeding and infl ammatory cells in lamina propria ( lymph cells, plasma cells ) . Acute phase shows accretion of neutrophil at base of crypts ( crypt abscesses ) . No granuloma is of import standard in differential diagnosing with Crohn s disease. Mucosal capillary are dilated. Inflammation may stay above muscularis mucous membrane or widen to submucosa. Glands are progressive destroyed, marked lessening in cytol, mucous secretion, atrophic alterations and regenerative alterations, besides manifested by atomic expansion and increased mitotic activity. Other characteristic shows, ulcer is covered by non specific granulation tissue, pseudopolyps ( mostly granulation tissues assorted with inflamed and hyperaemic mucous membrane. Flexible sigmoidoscopy is extended from anus to sigmoid colon. Abdomens X beams are speedy, inexpensive, non invasive and an ten beam of venters that is indicated in acute venters conditions such as enteric obstructor, perforation, dilation ( Toxic megacolonic ) . Trans-abdominal ultrasound is a non-invasive mode that may be helpful in the diagnosing of inflammatory intestine disease, but it can non be used to separate between ulcerative inflammatory bowel disease and Crohn s disease. It is used for naming bilious complication. CT has limited function in the diagnosing of unsophisticated ulcerative inflammatory bowel disease, nevertheless CT plays an first-class mode in the diagnosing of complication associated with disease. Barium clyster is particular type of x beam that uses Ba sulfate and air to sketch the liner of rectum and colon. The consequence can demo polyp, tumour, diverticulitis. Today, the utilizations of Ba clyster are rare due to the utilizations of endoscopy for naming. There is contraindication of utilizing Ba clyster in acute venters as complication of UC. Radio-nuclide surveies are utile in picturing disease activity and the extent of disease and in supervising the response to therapy. It is utile in instance of fulminant inflammatory bowel disease Serology trial is performed in about 20 % of instances of UC, overlapping symptoms, radiographic and histological characteristics make the differential diagnosing hard. It is of import to accurately distinguish between two diseases ulcerative inflammatory bowel disease and Crohn s disease, because the direction of patient are different and ulcerative inflammatory bowel disease is more hazard for malignance. The usage of an inflammatory intestine disease serology panel that should be included the followers, Perinuclear anticytoplasmic antibodies ( PANCA ) and Saccharyomyces cerevisiac IgA nd IgG antibodies ( ASCA ) . Because, PANCA is prevailing in ulcerative inflammatory bowel disease and ASCA is more prevailing in Crohn s disease. ASCA represent the immunologic marker corrected with Crohn s disease, because their high specificity ( 80-95 % ) . Immunohistochemistry appraisal of ki67 and p53 look assists the diagnosing and scaling of ulcerative inflammatory bowel disease related dysplasia. Strong immunoreactivity for p53 that suggested diagnosing of dysplasia, besides suggested Ki67 staining above basal two tierce of the crypt in high class dysplasia ( HGD ) . Complication There is significantly increased hazard of colorectal malignant neoplastic disease in patient with ulcerative inflammatory bowel disease after 10 twelvemonth s if engagement in the splenetic flection, nevertheless those with lone procotitis or rectosigmoid it is normally have no increased hazard. It is recommended that patient have screening by colonoscopies with random biopsies to look for dysplasia after eight twelvemonth s of disease activity. Treatment The standard intervention for ulcerative inflammatory bowel disease is depended on the extent of engagement and disease badness. The end is to bring on remittal ab initio with medicine, followed by the disposal of care medicine to forestall a backsliding of the disease. Dietary alteration: Diet rich of fibers, avoiding dairy merchandises, avoiding natural vegetates and fruit, because they cause hurt to inflamed mucous membrane of colon. Supplement intervention: Iron tabular arraies for intervention of anemia, multivitamin. Anti diarrheal drugs: Such as Immodium, a physician must closely supervise the individual taking these anti-diarrheal drugs to avoid precipitating toxic megacolon. Anti-inflammatory drugs: Such as aminosalicytates, corticoids and immunosuppressive drugs. Besides anti tumour mortification factor ( Infliximabe ) . Surgical intervention: Surgical intervention can be exigency operation and elected operation. Emergency operation is performed in instances of bleeding, blunt perforation, break up inflammatory bowel disease or toxic megacolon and elected operation is performed in instances of patient is non response to intervention and documented or strongly suspected carcinoma. There are different types of surgical attacks such as proctocolectomy with ileostomy, Ileoanal anatomises and continent ileostomy. Some probes are used for proctor of inflammatory intestine disease Concentration of tumour mortification factor alpha in stool is used as a marker of intestine redness in both ulcerative inflammatory bowel disease and Crohn s disease. Measurement degree of neutrophli binding by Ig and titers of antineutrophli Ig in serum from patient with ulcerative inflammatory bowel disease and patient with ulcerative inflammatory bowel disease station colectomy by utilizing a fixed neutrophil enzyme linked immunosorbent check. Measurement of azotic oxide in ulcerative inflammatory bowel disease patient during colonoscopy, gas was aspirated from different parts of the colon and instantly analyzed by a chemiluminescence technique.

Manufacturing technology Coursework Example | Topics and Well Written Essays - 4500 words

Manufacturing technology - Coursework Example The fuel is then compressed and burnt after which it is expelled. Al the fuel is then moved through the cam or pop shaft, this is then moved to the gear and finally to the tires. An automotive piston that is found in the gasoline engine can withstand temperatures of up to 573K. There is a coolant that runs through the engine block and it always has a temperature of 363K. The piston must be cold when it is fixed into the cylinder. The piston can withstand high pressure of up to 10KPa inside the cylinder. It can withstand different atmospheres; it is able to do well in high latitude as well as low latitude. However in high humidity the engine uses less fuel as compared to low humidity. 1 There are several materials that can be used to make an automotive piston. Some of this include aluminum and copper alloys. The material to be used should be able to withstand high temperatures to start with. This is because the temperature of the engine is too high and so the material has to be able t o withstand this without melting or having to expand a lot. The material also has to be able to withstand high pressure. A material that does not withstand high pressure cannot be used in the engine because of the high pressure that is experienced in the engine. Due to its high melting point and its ability to withstand high pressure and stress, the ideal material to be used is aluminum. ... The best however is the assembly of all the piston pins and rods. Before the assembly, the con rod is taken and there bores arranged in a parallel manner. This arrangement ensures that there is no bending of the cones when they are finally in use. Lubrication is another factor that is necessary. Before the pins are assembled in the cones care is needed to lubricate the pins to ensure that there is less friction between the pins and the cons. For the piston to withstand corrosion and abrasion it needs to be smoothened at the surfaces to make it look more clear and new. For better selection of which type manufacturing process is needed, CES process is used. The physical advantages as well as the cost of the processes are looked into. The software then gives out the best process to be used in terms of the cost and the mechanical advantages that it has to offer. Different methods contain different advantages but the best one that is used here is the manufacture by the powder rod technolo gy. This process is the simplification of the sinter and the extensional press processes. During the (PPAP) process no heat or even spark should be removed so the forging is done in completely heating and when it is totally enclosed in the dies. Two forms of forging are necessary these are the hot upsetting and the hot repressing. In the hot upsetting, the there is a significant amount of lateral flow. The production per part approval process is the manufacturing process that was used here. This process has been approved by various agencies in the government as well as many institutions of higher learning. Unlike the (APQP) which has been used in the development and automotives for the many years, (PPAP) has few failures when it comes

Head Trauma Research Paper Example | Topics and Well Written Essays - 1750 words

Head Trauma - Research Paper Example . What then becomes the main question is to what extent the current NFL will attempt to ameliorate the risks that recent studies have indicated. As such, this brief research paper will consider the following three research areas as a means of drawing inference upon the main research question: 1) to what extent has mental health evaluations of current and former NFL players revealed with regards to the health consequences of frequent and prolonged head injuries, 2) to what extent has this level of long-term head injury been discussed and researched within the medical community, 3) what preventative measures, both in the way that the game is played, coached, and recruited can help to ameliorate this risk and are any of these approaches likely to take hold within the current environment that defines today’s NFL. It can be seen that for the most part the level of analysis that has been performed, regarding the long-term effects of head trauma, has made it fairly evident that there is a clear and identifiable link between head trauma and mental health issues and/or neurological disorders. ... It does not take a large body of research to realize that the game of football is filled with heavy impacts and oftentimes characterized by head trauma (Jarret 1). Still, the shareholders within the decision making branches of the process sought little action with regards to seeking to identify and possibly ameliorate the broad range of known mental health issues that were beginning to show themselves within current and past players. Instead, the issue was subsequently swept under the rub as it was determined that the bad press and negative image that this could present to the game as well as the marked reduction in overall profits were too costly. Yet, as it became increasingly clear from an array of highly publicized issues, the sports and medical communities could no longer ignore the role that head trauma played within the National Football League. As a function of this level of exposure, the medical community began to focus more and more specifically on the level to which mental health issues were a direct result of the injuries and trauma sustained on the field of play. As the level and body of overall knowledge continued to grow and advance, medical practitioners and sports science specialists alike came to be aware of the true nature in which mental health was irrevocably linked to the ways in which players were repeatedly injured on the field and projected these injuries long after their short careers had drawn to a close (Tamney 5). This information leads the analysis to a fundamental juncture of understanding. It appears, from the research that has thus far been conducted, that key shareholders within the institution of professional

Psychology Journals Essay Example | Topics and Well Written Essays - 3000 words

Psychology Journals - Essay Example d by his belief based on his gathered evidence that the lab tests that use animal rarely result to anything that benefits humankind, that mostly are just for commercial intents. That people and animals are different species, thus using animals with people as the supposed beneficiary is not logical. in the medical sciences, research with animals has resulted in major achievements in psychology, which s/he believes have contributed to important benefits for human beings. S/he further cites that the biofeedback technique, which people use to control high blood pressure, originated from studies using lab animals. in the issue of animal cruelty, there had been a study that investigated 600 of these alleged accusations, but eventually did not support the charge of cruelty. S/he further points out that instances occur, but are infrequent and not typical of psychological experiments. people—including animal rights advocates—do not think that animals share the characteristics that allow them the same rights as humans; and these people condone pet sterilization, disregarding the animals right to breed. of the many experiments using animals, only a few contribute to important medical or psychological research. S/he further argues that a vast number of experiments are used for commercial purposes: to test new shampoos, cosmetics, food additives, or detergents. Yes, I believe both psychologists presented sound arguments based the criteria. Their claims are all verifiable, not simply opinions. They both cited sources, which can also be checked if they match. Finally, the incidents cited were more than one. Animals may be used in lab experiments as long as guidelines to the humane treatment are observed. Humans have been plagued by new diseases with some killing relentlessly, like the swine flu, among so many others. AIDS, after years of research, has yet remained incurable. If lab research using animals could give us hope in combating these diseases, then I would

A Review Of Absorption Refrigeration Technologies Engineering Essay

A Review Of Absorption Refrigeration Technologies Engineering Essay Most of industrial processes use a lot of thermal energy by burning fossil fuels to produce steam or heat for various needs in the industry. After the processes, heat is rejected to the surrounding as waste. This waste heat can be converted to useful refrigeration by using a heat operated refrigeration system, such as an absorption refrigeration cycle. Electricity purchased from utility companies for conventional vapor compression refrigerators can be reduced and cuts down the need for expensive electricity from the central grid. The use of heat operated refrigeration systems help reduce problems related to global environmental, such as the greenhouse effect from CO2 emission from the combustion of fossil fuels in utility power plants. Another difference between absorption systems and conventional vapor compression systems is the working fluid used. Most vapor compression systems commonly use chlorofluorocarbon refrigerants (CFCs), because of their thermo-physical properties. It is t hrough the restricted use of CFCs, due to depletion of the ozone layer that will make absorption systems more prominent. However, although absorption systems seem to provide many advantages, vapor compression systems still dominate all market sectors. In order to promote the use of absorption systems, further development is required to improve their performance and reduce cost. The early development of an absorption cycle dates back to the 1700s. It was known that ice could be produced by an evaporation of pure water from a vessel contained within an evacuated container in the presence of sulfuric acid. In 1810, ice could be made from water in a vessel, which was connected to another vessel containing sulfuric acid. As the acid absorbed water vapor, causing a reduction of temperature, layers of ice were formed on the water surface. The major problems of this system were corrosion and leakage of air into the vacuum vessel. In 1859, Ferdinand Carre introduced a novel machine using wat er/ammonia as the working fluid. This machine took out a US patent in 1860. Machines based on this patent were used to make ice and store food. It was used as a basic design in the early age of refrigeration development. In the 1950s, a system using lithium bromide/water as the working fluid was introduced for industrial applications. A few years later, a double-effect absorption system was introduced and has been used as an industrial standard for a high performance heat-operated refrigeration cycle. However with the advent of cheaper vapor compression machines in the late 1960s and abundant and widespread availability of electricity lead to the vapor absorption machines taking a backseat. As a result we see that despite the fact that this technology has been around for almost 250 years, a viable alternative to the vapor compression machines for domestic use at a comparable cost has not been found. The aim of this paper is to provide basic background and review existing literature on absorption refrigeration technologies. A number of absorption refrigeration systems and research options are provided and discussed. It is hoped that, this paper should be useful for any newcomer in this field of refrigeration technology and generate in this area the same interest that the authors feel. PRINCIPLE OF OPERATION The absorption refrigeration system works with a binary solution consisting of refrigerant and absorbent. In Fig. 1(a)[1] two evacuated containers are connected to each other. The container on the left has liquid refrigerant while the right container has a binary solution of absorbent/refrigerant. The solution in the right container will absorb refrigerant vapor from the left one causing pressure to reduce. While the refrigerant vapor is being absorbed, the temperature of the remaining refrigerant will reduce as a result of its vaporization. This causes a refrigeration effect to occur inside the left container thus dropping its temperature. At the same time, solution inside the right container becomes weaker in concentration because of the higher content of refrigerant absorbed. This is due to the absorption process. Absorption process is an exothermic process; therefore, it must reject heat out to the surrounding in order to maintain its absorption capability. Whenever the solution cannot continue with the absorption process because of saturation of the refrigerant, the refrigerant must be separated out from the diluted solution.[1] Heat is usually the key for this separation process. The separation of the refrigerant is of paramount significance and most of the work recently has gone into making this as efficient as possible so as to increase the refrigeration effect. It is applied to the right container in order to dry the refrigerant from the solution as shown in Fig. 1(b).[1] The refrigerant vapor will be condensed by transferring heat to the surroundings. With these processes, the refrigeration effect can be produced by using heat energy. However, the cooling effect cannot be produced continuously as the process cannot be done simultaneously. Therefore, an absorption refrigeration cycle is a combination Fig. 1. (a) Absorption process occurs in right container causing cooling effect in the other; (b) Refrigerant separation process occurs in the right container as a result of additional heat from outside heat source. of these two processes as shown in Fig. 2.[1] As the separation process occurs at a higher pressure than the absorption process, a circulation pump is required to circulate the solution. Coefficient of Performance of an absorption refrigeration system is obtained from The work input for the pump is negligible relative to the heat input at the generator; therefore, the pump work is often neglected for the purposes of analysis. Fig. 2. A continuous absorption refrigeration cycle composes of two processes mentioned in the earlier figure. WORKING FLUID PAIRS FOR ABSOPRTION SYSTEMS The performance of an absorption system is heavily dependent on the properties of the working pair. We are mainly concerned with the thermal and chemical properties of the working fluids. The fundamental requirement is the absorbent/refrigerant combination, in liquid phase, must have a margin of miscibility in the operating temperature range of the cycle. The mixture should also be chemically stable, non toxic, non corrosive and should be able to maintain its fluidity in the operating range. Apart from these certain other desirable properties are: The difference in the boiling points of the pure refrigerant and mixture at the same pressure must be as large as possible. Refrigerant should have high heat of vaporization and high concentration within the absorbent in order to maintain low circulation rate between the generator and the absorber per unit of cooling capacity. Transport properties that influence heat and mass transfer, e.g., viscosity, thermal conductivity, and diffusion coefficient should be favorable. Both refrigerant and absorbent should be environmental friendly and low-cost, specially keeping in mind the increasing danger to the environment. The absorption refrigeration system, which has some advantages, such as silent operation, high reliability, long service life, simpler capacity control mechanism, easier implementation, and low maintenance, is widely acknowledged as a prospective candidate for efficient and economic use of solar energy for cooling applications. Also, the absorption refrigeration cycle is usually a preferable alternative, since it uses the thermal energy collected from the sun without the need to convert this energy into mechanical energy as required by the vapor compression cycle. In addition, the absorption cycle uses thermal energy at a lower temperature than that dictated by the vapor compression cycle. Many working fluids are suggested in literature. A survey of absorption fluids provided by Marcriss [2] suggests that, there are some 40 refrigerant compounds and 200 absorbent compounds available. However, the most common working fluids are NH3- H2O and LiBr-H2O. The binary systems of NH3- H2O and LiBr-H2O are well known as working fluid pairs to be used both in absorption heat pumps and in absorption refrigerators at present. Theoretical and experimental studies have been conducted to optimize the performance of absorption refrigeration cycles using NH3- H2O and LiBr-H2O as refrigerant- absorbent combination. The advantage for refrigerant NH3 is that it can evaporate at lower temperatures (i.e. from -10 to 0 °C) compared to H2O (i.e. from 4 to 10 °C), therefore, for refrigeration, the NH3-H2O cycle is used. NH3 has a high latent heat of vaporization, which is necessary for efficient performance of the system. It can be used for low temperature applications, as the freezing point of NH3 is -77 °C. Since both NH3 and water are volatility, the cycle requires a rectifier to strip away water that normally evaporates with NH3. Without a rectifier, the water would accumulate in the evaporator and offset the system performance. There are other disadvantages such as its high pressure, toxicity, and corrosive action to copper and copper alloy. However, water/NH3 is environmental friendly and low-cost. The use of LiBr-H2O for absorption refrigeration systems began around 1930. Two outstanding features of LiBr-H2O are non-volatility absorbent of LiBr (the need of a rectifier is eliminated) and extremely high heat of vaporization of water (refrigerant). However, using water as a refrigerant limits the low temperature application to that above 0 °C. As water is the refrigerant, the system must be operated under vacuum conditions. At high concentrations, the solution is prone to crystallization. It is also corrosive to some metal and expensive. Research has been performed for NH3-H2O systems theoretically and experimentally and these studies show that the NH3-H2O system exhibits a relatively low COP when compared to its LiBr-H20 counterpart.[1] Efforts are being made to search for better working fluid pairs that can improve system performance. It is proposed that NH3-LiNO3 and NH3-NaSCN cycles can be alternatives to NH3-H2O systems.[3] A study on the use of NH3-LiNO3 and NH3-NaSCN cycles by Jasim M. Abdulateef [3] reveals that ammonia-lithium nitrate and ammonia-sodium thiocyanate cycles give better performance than the ammonia-water cycle, not only because of higher COP values, but also because of no requirement for analyzers and rectifiers. Therefore, they are suitable alternatives to the ammonia-water cycle. Generally speaking, the performance for the ammonia-lithium nitrate and ammonia-sodium thiocyanate cycles are similar, with the latter being slightly better than the former. However, the ammonia-sodium thiocyanate cycle cannot operate at evaporator temperatures below 10 °C for the possibility of crystallization.[3] LITHIUM BROMIDE-WATER ABSORPTION SYSTEM There has been renewed interest to use thermally driven cooling systems from the air conditioning and process cooling fraternities. The lithium bromide-water absorption chiller is one of the front-runners due to the following reasons [4]: It can be thermally driven by gas, solar energy, and geothermal energy as well as waste heat, which help to substantially reduce carbon dioxide emission, this is its USP when it comes to process industries generating large amount of waste heat Its use of water as a refrigerant, which is easily available and cheap. It is quiet, durable and cheap to maintain, being virtually void of high speed moving parts; Its vacuumed operation renders it amenable to scale up applications. LiBr-H2O absorption chillers enjoy cooling capacities ranging from kilowatts (kW) to megawatts (mW) which match with small residential to large scale commercial or even industrial cooling needs. However they currently enjoy only a fraction of the extent of deployment as their vapor compression counterparts. Their major debilitating factors are a low Coefficient of Performance (COP), larger footprint and required headroom, corrosion and crystallization issues and stringent requirements of vacuum leak tightness over its design lifespan. Over the past 30 years, extensive efforts have been devoted to: Develop advanced absorption cycles which could work at low heat source temperature or recover more heat to improve system performance. Improve the design of major components such as generator and absorber to enhance their heat and mass transfer efficacy. Avoid crystallization problem and, Develop new and reliable working pairs. Problems in domestic use of LiBr-H2O absorption systems Even though the technology has been around for quite some time now its usage in domestic applications is hitherto seen. According to Kevin D. Rafferty [5] there is only one company (Yazaki, undated) currently manufacturing small tonnage ( While calculating the mass flow rate of the refrigerant for an assumed case of 1.5TR cooling, as is the requirement for most domestic air-conditioning applications, we obtained a very low mass flow rate in the order of a few gm/s. Also the ensuing pressure difference to maintain such working conditions led to a very high pressure ratio, to the order of about 50, between the absorber and generator. Upon market survey, (here in Pune, India) we discovered that pumps catering to such a low flow rate at this large a pressure differential were not readily available, some suppliers of customized pumps, however, did claim to be able to make such pumps, albeit at a very high cost. We explored the idea of then increasing the mass flow rate to higher than what was calculated for the required tonnage, but realized that increasing mass flow rate for evaporator of same tonnage would lead to un-evaporated refrigerant thus decreasing the COP of the system. During further study of the LiBr-H2O absorption systems we came across an interesting review on absorption chillers and their various configurations by Xiaolin Wang and Hui T. Chua [4], which provides a valuable insight. For the standard single effect system, simple structure and low cost are pursued. The single-effect double-lift absorption system are proposed and developed for the utilization of low temperature heat sources. However, multi-effect absorption systems are suggested to provide higher efficiency with a high temperature heat source. In order to increase the system performance and avoid crystallization problem, various heat and mass recovery systems, modifications to the generator and the absorber, different working pairs and additives have been developed. Furthermore hybridization of absorption chiller cycle with other cooling cycle(s) promises a higher overall performance as compared with that of each single constituent cycle. Single-Effect Absorption Chillers It consists of evaporator, absorber, generator, and a condenser. Its simplicity, small size, high reliability and lower maintenance cost are its advantages. While low cooling capacity, high weight and size and low COP are disadvantages Fig. 3. A schematic of a single effect absorption cycle in a Dà ¼hring plot Uchida from Hitachi developed a modular cascaded absorption chiller comprising of chiller units connected to one another in which chilled water flows through the chiller units in series while cooling water through parallel. [6] Water in chilled and cooling column flows in opposite direction and in absorber solution is sprayed in 1 or more stages. In this type of arrangement lower evaporator temperature can be achieved as compared to conventional arrangement. This results in lower amount of water circulation and higher efficiency due high average temperature difference, compact size, and lower capacity pumps. Inoue from Ebara Corporation integrated the absorber, evaporator, generator, and a condenser into a compact housing so that it can be used for used in residential operations. The arrangement is as shown in Fig. 4. A Absorber, C Condenser, E Evaporator, G Generator, X -Solution heat exchanger, SP Solution pump, RP Refrigerant pump Fig. 4. A single effect absorption chiller [7] This also resulted in reduced costs, compact size, less thermal stresses and low material usage. Inoue from Ebara Corporation in further bid to reduce size and increase COP used plate type heat exchanger in absorber and condenser. [7] In this water flows into the absorber and condenser in parallel and is distributed according to fluid resistance in each unit. This reduces mass flow rate and distributed flow results in elimination of complicated valve system. Problem of crystallization in chiller is avoided using popular J-tube technology. [4] Crystallization in system occurs in generator due to high concentration of LiBr resulting in blockage of flow to solution heat exchanger and will be accumulated in generator. When solution reaches certain level in generator, the hot refrigerant -weak solution will overflow via J-tube to the absorber and warms the refrigerant -strong solution immediately. This will warm the crystallized solution and dissolve them into the solution. Single-Effect Double Lift Absorption Chillers Fig. 5. A single-effect double lift cycle. Since single effect cycle requires the temperature of 90oC and above for proper working, for temperature lower than this results in significant drop in efficiency of the cycle. Therefore utilize to lower temperatures single effect single lift which can work for heat source between 70oC and 90oC and single effect double lift cycle works within waste heat source temperature down to 55oC was developed. A COP in the range of 0.35-0.7 is obtained. [4] Fig. 5. shows the construction of single effect double lift cycle consists of evaporator, absorber-1, generator-1, and a condenser forming single effect cycle the evaporator, absorber-1, generator-3, absorber-2, generator-2, and condenser constitute a double lift cycle. In this the solution from absorber1 is first is sent to generator-1 for steam generation, after this serially solution is sent generator-3 for further generation and refrigerant- weak solution is sent to absorber-1 . The steam generated in generator-3 is absorbed by the absorber-2 which then sent to the generator-2 for generation. The steam from generator-1 and generator-2 is sent in condenser to continue the cycle. The hot water in the system is supplied serially to the generator-1, generator-2, and generator-3. The cooling water flows to the condenser, absorber-1 and absorber-2 in parallel to avoid complicated control and unstable working conditions. The advantage of this system is high COP as compared single effect cycle since energy is utilized more effectively in this cycle. But due increase in number of components this has larger size as compared to single effect cycle. This system is commercialized by INVEN absorption GmbH. [4] Double-Effect Absorption Chillers Fig. 6. A double effect series flow type absorption cycle. This system is developed to increase COP of absorption chiller operating at temperature greater than 150oC since at this temperature the COP of single effect cycle is low. COP achieved in this cycle is in the range of 1.1 to 1.3. It was first patented by Loweth in 1970[8] and commercialized by Trane in the same year. Saito [9] from Ebara Corporation and Alefeld [10] improved and modified the double effect absorption refrigeration machine in 1980 and 1985, respectively. As shown in the plot above, double effect cycle consists of a high temperature and a high pressure generator. Steam generated from this generator is used to generate steam from low pressure generator through a heat exchanger. This steam is further sent to the condenser and evaporator for cooling. This arrangement is known as series flow arrangement. Therefore temperature differential utilization in double effect is more as compared to the single effect but heat rejected at the condenser and cooling temperature at the evaporator are at about the same temperature, hence COP is greater. Above mentioned arrangement works very close to crystallization temperature of LiBr-water solution and the high temperature generator operates at high pressure in order maintain requisite solution flow rate. To avoid solution pumping, the high temperature generator has to be sufficiently elevated to enjoy gravity assisted flow, resulting in higher head room. To avoid these problems, Hitachi developed a parallel flow double effect arrangement as shown below in Fig. 7. In this arrangement solution is separated after solution pump and is sent to high temperature generator through high temperature heat exchanger and to the low temperature generator, respectively. So, the operation condition is displaced further from crystallization point of solution. Flow rate of solution, pressure, elevation is also reduced as compared to series flow arrangement. Nagao from Hitachi disclosed a chiller which consists of an absorption section, an evaporator section, a condenser section, a generator section all of which are divided into two stages. The first stage evaporator second stage evaporator are arranged to be enclosed respectively by first stage absorber second stage absorber. Similar configuration is applied to the generator and condenser. This arrangement reduces heat transfer losses. Fig. 7. A double effect parallel flow type cycle. Hiro [11] from Sanyo Electric Co. disclosed a double effect absorption chiller, in which the connecting pipe conveying the liquefied refrigerant in the low temperature generator to the condenser is installed with an orifice together with a control valve so as to control the refrigerant pressure. A control circuit is connected to this control valve to actively control the refrigerant pressure and therefore control the solution concentration in the high temperature generator and the absorber. This control circuit facilitates the passage of the refrigerant to the condenser without stagnation during chiller start up or in the event of a sudden increase in cooling load. It is also capable of maintaining a suitably reduced pressure in the refrigerant during steady-state operation so as to achieve a higher operating efficiency. Recently Aoyama [12] from Ebara Refrigeration Equipment System disclosed an internal heat recovery scheme which aims to increase intrinsic COP of the machine and heat scavenging scheme which strives to extract more energy from heat source which drives the chiller. According to this invention, the refrigerant rich solution path leading from the absorber to the high temperature generator is divided into two routes. The first route is installed with one or two drain heat exchanger to scavenge the remaining enthalpy of the heat source powering the high temperature generator. The second route is installed with one or two regenerative heat exchanger to recover the heat of the hot and refrigerant-weak solution leaving the high temperature generator. Modeling and Simulation of LiBr-H2O absorption systems A recent paper by V. Mittal, K.S. Kasana and N.S. Thakur on Modeling and simulation of a solar absorption cooling system for India [13] simulated the model of a solar-powered, single stage, absorption cooling system, using a flat plate collector and water-lithium bromide solution. A computer program was developed for the absorption system to simulate various cycle configurations with the help of various weather data for the village Bahal, District Bhiwani, Haryana, India. The effects of hot water inlet temperatures on the coefficient of performance (COP) and the surface area of the absorption cooling component were studied. Simulation results are discussed in this section for the performance of a 10.5 KW solar driven lithium bromide absorption cooling system. Fig. 8. depicts the effect of the hot water inlet temperatures Ts on the system COP and flow ratio FR. It can be seen that an increase in this temperature resulted in the decreases of FR. This is due to increases in the mass fraction of concentration solution (XG). While with an increase in this temperature, COP increases. Fig. 8. The effect of the hot water inlet temperatures on the system COP and FR (Te = 280 K, QL = 10.5 KW, Tc = 306K) Figure 3 depicts the effect of the hot water inlet temperature on the surface area of the system components. It can be seen that increase in this temperature results in the decrease of the absorber and solution heat exchanger surface area. As flow ratio decreases, the thermal energy extracted from the absorber also decreases and hence the temperature of the absorber increases, which further resulted in the increase of logarithmic mean temperature difference (DTm) in the absorber and solution heat exchanger. By decreasing the heat capacity and increasing DTm, heat transfer surface area normally decreases in these components. Fig. 9. The effect of the hot water inlet temperatures on the surface area of the system components (Te = 280 K, QL = 10.5 KW, Tcool, in = 291 K) From this study the following conclusions were made: The hot water inlet temperature is found to affect the surface area of some of the system components. Increasing this temperature decreases the absorber and solution heat exchanger surface area, while the dimensions of the other components remain unchanged. Although high reference temperature increases the system COP and decreases the surface area of system components, lower reference temperature gives better results for FNP than high reference temperatures do. For this study, a 353 K reference temperature is the best choice. This paper thus provides a general idea to anyone looking to build a model of a vapor absorption system, about the generator temperature needed and its effect on the flow rate and COP. AMMONIA-WATER ABSORPTION SYSTEM The working of ammonia-water absorption refrigeration system is based on the  simple vapor absorption refrigeration systems. In this system ammonia is used as the refrigerant and water is used as the absorbent. The ammonia-water absorption system is used in the domestic as well the commercial applications where the requirement of the temperature is below 0 degree C. The major advantages of the ammonia-water solution are: Water has strong affinity for ammonia and they are soluble with each other in wide operating conditions that occur in different refrigeration applications. The ammonia-water solution is highly stable and works well with many materials. Ammonia is a common chemical and it is easily and cheaply available. However the system has a few disadvantages too some of which are: Except copper and its alloys that get corroded in the presence of ammonia. Due to its toxicity its applications are limited. Due to the fact that some of the water in the generator also boils off with the ammonia and escapes as vapor, a rectifier is needed to remove this water vapor before it enters the condenser. This adds to the expense and complexity of the design. The COP of the ammonia-water systems is slightly lower than their LiBr-water counterparts. Fig. 10. Schematic of a typical ammonia-water absorption system. Domestic use of ammonia-water absorption systems Unlike the LiBr-H2O absorption system, the ammonia-water absorption system has found widespread use in the domestic use market. These refrigerators are very popular as car fridges used in SUVs and RVs. Many companies are involved in the manufacturing of such equipment. Electrolux was amongst the first companies to start manufacturing absorption refrigerators for commercial use. One of the main issues with the early domestic absorption refrigerators was that the water would get crystallized and the whole setup would then need to be inverted for a few hours to get the system working again. Such old models of absorption models are available in scrap; however most of them are not in working condition. We came across one such model ourselves, however even on extensive research the exact composition of the water ammonia mixture or the operating pressure was not found. Most people do not recommend recharging of these old units as they are factory sealed and compositions are not known, however some people have tried recharging and obtained successful results. Simulation of absorption diffusion Solar refrigeration systems A study was carried out by B. Chaouachi and S. Gabsi [14] for the design and the simulation of an absorption diffusion refrigerator using solar as source of energy, for domestic use. The design holds account about the climatic conditions and the unit cost due to technical constraints imposed by the technology of the various components of the installation such as the solar generator, the condenser, the absorber and the evaporator. Mass and energy conservation equations were developed for each component of the cycle and solved numerically. The absorption diffusion refrigerating machine is designed according to the operation principle of the refrigerating machine mono pressure invented by Platern and Munter. This machine uses three operation fluids, water (absorbent), ammonia (Refrigerant) and hydrogen as an inert gas used in order to maintain the total pressure constant. The study yielded some interesting conclusions. The operating boundaries of the system were examined by conducting simulations for various values of the generator temperature, TG, the evaporator temperature, TE, the pressure of the system, P and the generator heat input, QG. The operation ranges were found to be: 5 Fig. 11. COP vs. to generator temperature for various pressures of the system (ÃŽÂ ¾r=0.45, Te=273K) Fig. 11. presents the COP vs. the generator temperature for different pressures of the system for a fixed rich concentration and evaporator temperature. It shows that the COP decreases as the generator temperature increases and it increases when the pressure increases too. This is may be attributed to the fact that a smaller amount of ammonia was separated from the ammonia-water solution and thus more solution had to be circulated so as to maintain the refrigerant flow rate in the condenser. It thus recommended that pressure of the system as high as possible. Fig. 12. OP vs. the evaporator temperature (ÃŽÂ ¾r = 0.4, P=12.5 bars) The Fig. 12. shows that the COP decreases as the generator temperature increases. It was also found that the higher the evaporator temperature, the higher COP, i. e. that more heat was absorbed in the evaporator. There are thus opposing demands for the evaporator temperature; on the one hand, it should be high enough (depending on the desired cooling capacity) to yield a higher COP, while a lower evaporator temperature would yield better cooling. Thermodynamic simulation of Solar absorption refrigeration systems Another thermodynamic simulation carried out by Antonio J. Bula [15], for an ammonia water solar absorption system. The operating conditions chosen were: Tg = 70 90 °C Tc = 30  °C Ta = 25  °C Te = 5  °C

Advantages of Arranged Marriages Essay

Marriage is a union or an institution in which two individuals are bound together legally, religiously or otherwise. It occurs as a result of several motives such as emotional, physical, legal, religious, financial, etc. Marriage is not always between two individuals of opposite genders and not everyone involved goes into it of their own free will. In ancient history, women barely had rights of their own and were considered properties of their families and properties of their husbands after marriage. This belief went on for centuries until the 19th and 20th centuries when people in Europe, America and a couple other continents began to make several legal changes to improve the rights of women. For these reasons and many more, marriage has become one the most debated issues in societies today. It is said to be one of the subjects that brings about chaos and confusion in families and societies and that its disadvantages vary on the type of marriage in question. Arranged marriages are one of the many types of marriages people are most skeptical about. Some people even feel that it causes more havoc in families than any other type of marriage. Arranged marriages are mostly practiced by royal families all around the world and in most cases, it is considered not as a union between a man and a woman as husband and wife but as a partnership or an alliance formed between two families. Although arranged marriages may not be completely beneficial to the couples in some cases, it tends to have more advantages than disadvantages in the society today because it reduces the rate of divorce in societies, it guarantees a wider range of happiness in families and it is a secure form of marriage (country reports on human rights practices 2008). To begin with, there are fewer cases of divorce in arranged marriages today and this is as a result of a few precautions taken before a marriage is actually arranged. Firstly, marriages are usually arranged either by the parents of the individuals, a close family member or a matchmaking agency. They (especially the parents) all ensure that the couples that are paired together are compatible in every way (Mayzin 2013). Thorough background checks such as religious, social, financial, cultural and even medical checks are carried out on both individuals. Secondly, divorce is not tolerated in most, if not all, of the societies where arranged marriage is practiced (Zuberi 2013). To elaborate further, arranged marriages are common in countries like India, Nepal, Pakistan, Bangladesh and Sri Lanka and there is very little tolerance for divorce in these countries. Lastly, most arranged couples try to resolve their problems amicably to avoid embarrassment from their parents. As stated earlier, when a marriage is arranged, the union is not only between the couple but also between the two families so when couples in arranged marriages have misunderstandings, they try their best to resolve them as quickly as possible in order to prevent their parents from finding out about it and interfering in their private lives. Due to this, the couples end up saving their marriages unconsciously by making sure none of their misunderstanding lasts longer than is necessary. In addition, arranged marriages tend to guarantee a wider range of happiness to the couples involved. To start with, although some of them get off to wrong starts and the first few years do not appear to be as blissful as expected, the couples learn to coexist with each other sooner or later. When they realise that hating and loathing each other is nothing more than a waste of valuable time they should spend to get to learn more about their spouse, they tend to loosen up and, with equal effort from both sides, learn to care for each other. In most cases, the initial feeling of hate eventually turns to love (Lee 2013). Also, the couples in arranged marriages have a lot of similar interests. Most couples in love marriages tend to engage in oral brawls when it comes to family matters and decision making in general because of lack of common interests on certain issues. Like cases as these are rare in arranged marriages due to the critical scrutiny conducted by the parents and family members of the couples before they are labelled as a perfect match. Finally, most love marriages occur as a result of spontaneous decisions made due to irrational thinking. Take for instance, the movie, â€Å"A few best men†. A man and a woman went to an island for a short vacation and while they were there, they met and fell in love instantly. Or so they thought. They spent their time getting to know each other and after ten days, the duration of the vacation, they felt they knew all there was to know about each other so they decided to get married. They had a great honeymoon and promised to be with each other forever. After a few months, they began to have several arguments due to their many dissimilar preferences and countless clashes of interest. Then reality struck; their blissful marriage was over and they had gotten to the stage where they both felt miserable and couldn’t stand each other. A couple more months and they were divorced and had gone their separate ways. Moreover, arranged marriages can be considered as safe marriages because of the following reasons. First of all, there are no social inferiorities between the couples in arranged marriages due to the many similarities in their backgrounds. For instance, if an arranged couple attends a social event together, neither of them would feel out of place because they both have similar upbringing and have both had comparable social experiences. Also, couples have low expectations in arranged marriages because they barely get to know much about their spouses before they get married. They just trust that their families have made the right choices for them so they go along with it and hope for the best to come out of the situation. Due to this, the couples have low expectations of their spouses and sometimes their partners turn out to be amazing; this strengthens the foundation of the marriage. In situations where this is not the case, the little expectations minimizes the level of disappointment. Finally, there are rarely cases of domestic violence in arranged marriages. Just as stated earlier, before a marriage is arranged, thorough background checks are conducted on the potential partners and if as much as a hint of violence is spotted in the background of either of them, the person is not likely to be chosen as a spouse. Furthermore, opponents argue that arranged marriages could also be considered as forced marriages. In some cases, this argument could be legitimate because some couples are forced into marriage for family and societal benefits. For example, some parents force their children, especially the female children, to get married to people from wealthy families with high social standards because of some financial difficulties their families might be facing at the moment or plainly because of a craving for family name and social recognition. In other words, this argument could also be irrelevant and inauthentic for the following reasons. Firstly, arranged marriages these days are optional and are only carried out with the children’s consent (Should arranged marriages be outlawed? 2013). Before a marriage is arranged, the potential couples are brought together, introduced and are given unlimited time to get to know each other. After this phase is completed, the individuals are left to decide whether or not they want to spend the rest of their lives with the person in question. If after this, neither of them is interested in the other, the topic is dropped and a new search for another suitable partner begins. Lastly, forced marriages are obsolete and are against the law (Travis 2000). A law has been enforced that parents forcing marriages on their children is against the law and could be charged with a criminal offence. With this law enforcement on their necks, parents would not dare to marry their children off against their will. In conclusion, arranged marriages have been said to solve several problems such as incompatibility in couples, difficulty in finding a spouse, inferiority complex, etc. Although arranged marriages may not be completely beneficial to the couples in some cases, it tends to have more advantages than disadvantages in the society today because it reduces the rate of divorce in societies, it brings about peace and harmony in families and it is a secure form of marriage.

The human mind is a delicate thing

The human mind is a delicate thing. At times it can create such wonderful ideas: beautiful art, drama and works of fiction; scientific tools to enrich our lives. Yet it has a dark side, a side people prefer to keep hidden. However there are events which can bring this to the surface; My name is John Frederson; this is my tale†¦ It was about ten years ago now, I was at the height of my childhood and life was wonderful. My parents were wealthy aristocrats who owned a vast estate, one that easily spanned the length of three football pitches; it was like our own private country. The garden brimmed with greenery; there were shrubs and trees everywhere, enhanced by the beautiful roses, tulips and foxgloves creating a living rainbow. If you listened close enough I'm sure the flowers sang along with the chorus instigated by the angelic doves and nightingales; the heavenly tune was comparable to that of any church choir. Now the house, or I should say mansion, we lived in was not as magical as the garden, just a large house, not quite a mansion. There were everyday appliances and creaky floorboards which added to the character of the abode; it was almost like a grandfather to me, providing comforting warmth and security. But that was nothing compared the loving embrace of my parents. Both of them hard working, hones t people: they cleaned the house, tended the gardens and cooked the meals all themselves, they didn't believe in maids or butlers. I loved them more than anything in this world, and thanks to my home tutoring; they were the only friends I had. Then one day it happened. â€Å"Miles! Come here my boy!† my father called to me, so at once I hurried over as fast as I could (he was not a man you kept waiting). â€Å"Yes daddy what do you need?† â€Å"Well your mother is away in the car so perhaps you could cycle down to the store and fetch a jar of coffee and pint of milk for me?† I wasn't sure whether that manner of speaking was put on or if he really did speak so exaggeratedly. But I quickly dispelled these thoughts and sauntered off down the country road to the local supermarket. Looking back, I realise that I was very lucky father sent me out that day. I can't help but wonder, did he know what would happen? I returned to the living room to find my mother and father had been murdered, slaughtered mercilessly by something not human; no one but a demon could commit such an atrocity. Their bodies were sliced up, chopped like vegetables, their heads no longer attached; this was instead all displayed upon our finest dinner service, the heads retaining their tragic expressions of fear. As if that wasn't enough, the neurotic bastard had also drawn, in blood, a gigantic, smiling face across the wall. I honestly didn't know how to react. I kept a tight hold of the plastic handle of the bag. My hand was ripe with sweat. My eyes gazed, unblinking, upon the scene. I look back now and wonder why I didn't shed any tears then. Maybe my emotions were so mixed. Feelings of anger. Feelings of sorrow. All of them trying to claw their way to the surface but in vain. I didn't express what I felt. In truth I didn't know how to. My head was doing somersaults and there was little I could do. I just remained in the doorway, gripping the bag, all the while glaring at the gruesome scene. I regained control of my body and at once proceeded to inspect the atrocious face. Before I could get close enough, crash! The mirror above the mantelpiece fell to the floor shattering into a million fragments. Days, months and years passed yet I retained my youth. The house did not; it was still standing, but withered and decayed. I still showed no sign of expression. The feelings were getting stronger; I felt myself becoming unstable. â€Å"No! I am not going insane!† I said to myself over and over at the time, ironic really. â€Å"The important thing is to get help. Then everything will be better, much better.† Speaking aloud was one of the few comforts I enjoyed. But where could I get help? â€Å"The police think I'm dead; I can't let them to know I'm alive. All my hard work would have been for nothing if that were the case. After-all, a dead boy cannot kill†¦Ã¢â‚¬  I was proud of having such a wonderful idea, father was proud too. Since I was declared dead in absentia I was no longer a person. As far as the law were concerned I was a corpse in the ground. I would be their last possible suspect. â€Å"It's brilliant! Now to hunt my prey and make him suffer for what he's done. Then I'll be all better isn't that right mummy?† Rummaging through dusty furniture and cobwebbed walls I searched for the perfect weapon, brutal yet stylish. Something like†¦ a sword. That would be perfect and deliciously ironic; the killer murdered by the same weapon he used. â€Å"Father did you keep any swords? In the study you say? Oh marvellous!† I skipped to my father's old work room filled with a great sense of anticipation: I would have the key to freeing my mind from these shackles. Once I entered the room there it was, displayed upon the wall in all it's glory, yet the blade was sullied by a deep crimson stain. I took it down and grasped it strongly in my right hand. It felt pleasant, almost warm. It offered protection and redemption, yet also wrought pain and suffering: never was there such a poetic weapon. Smiling manically but happily, I left the house. It was time to have my revenge. Rain. Wet and miserable, it shrouded Belle-View house in a haunting grey mist. â€Å"Doctor Robertson, may I have a word?† Jeanne, the carer, called out. â€Å"Yes? What do you need?† the tall old man replied, his face was covered in a fine fur; he was clinging religiously to the little hair that still occupied his head. â€Å"Patient number 33: John Frederson. He hasn't had any medication for three whole days now and people are starting to become disturbed by his screaming and detestable giggling. Permission to tranquillise him before he hurts himself?† she seemed stressed although she would never admit it. â€Å"Yes†¦ yes go ahead,† he took a deep sigh, â€Å"if only they knew the truth.†

Methane as a Greenhouse Gas

Methane as a Greenhouse Gas Methane is a major constituent of natural gas, but its chemical and physical characteristics also make it a powerful greenhouse gas and worrisome contributor to global climate change. What Is Methane? A methane molecule, CH4, is made of a central carbon atom surrounded by four hydrogens. Methane is a colorless gas usually formed in one of two ways: Biogenic methane is produced by microorganisms breaking down certain types of sugars in conditions where oxygen is absent. This biologically-produced methane can be released to the atmosphere immediately upon being produced, or it can be accumulated in wet sediment only to be released later.Thermogenic methane was formed when organic matter was buried deeply under geological layers and over millions of years, and then broken down by pressure and high temperatures. This type of methane is the primary constituent of natural gas, making up 70 to 90% of it. Propane is a common by-product found in natural gas. Biogenic and thermogenic methane may have different origins but they have the same properties, making them both effective greenhouse gases. Methane as a Greenhouse Gas Methane, along with carbon dioxide and other molecules, contributes significantly to the greenhouse effect. Reflected energy from the sun  in the form of longer wavelength infrared radiation excites methane molecules instead of traveling out into space. This warms up the atmosphere, enough that methane contributes to about 20% of the warming due to greenhouse gases, second in importance behind carbon dioxide. Because of the chemical bonds within its molecule  methane is much more efficient at absorbing heat than carbon dioxide (as much as 86 times more), making it a very potent greenhouse gas. Fortunately, methane can only last about 10 to 12 years in the atmosphere before it gets oxidized and turns into water and carbon dioxide. Carbon dioxide lasts for centuries. An Upward Trend According to the Environmental Protection Agency (EPA), the amount of methane in the atmosphere has multiplied since the industrial revolution, growing from an estimated 722 parts per billion (ppb) in 1750 to 1834 ppb in 2015. Emissions from many developed parts of the world have now appeared to have leveled off, however. Fossil Fuels Once Again to Blame In the United States,  methane emissions come primarily from the fossil fuel industry. Methane is not released when we burn fossil fuels, like carbon dioxide does, but rather during the extraction, processing, and distribution of fossil fuels. Methane leaks out of natural gas wellheads, at processing plants, out of faulty pipeline valves, and even in the distribution network bringing natural gas to homes and businesses. Once there, methane continues to leak out of gas meters and gas-powered appliances like heaters and stoves. Some accidents occur during the handling of natural gas  resulting in the release of large amounts of gas. In 2015 very high volumes of methane were released from a storage facility in California. The Porter Ranch leak lasted for months, emitting almost 100,000 tons of methane into the atmosphere. Agriculture: Worse Than Fossil Fuels? The second largest source of methane emissions in the United States is agriculture. When evaluated globally, agricultural activities actually rank first. Remember those microorganisms that produce biogenic methane in conditions where oxygen is lacking? Herbivorous livestock guts are full of them. Cows, sheep, goats, even camels have methanogenic bacteria in their stomach to help digest plant material, which means they collectively pass very large quantities of methane gas. And it is not a minor issue, as a full 22% of methane emissions in the United States are estimated to come from livestock. Another agricultural source of methane is the production of rice. Rice paddies contain methane-producing microorganisms as well, and the soggy fields release about 1.5% of global methane emissions. As the human population grows and with it the need to grow food, and as temperatures rise with climate change, it is expected that methane emissions from rice fields will continue to increase. Adjusting rice-growing practices can help alleviate the problem: temporarily drawing down water mid-season, for example, makes a big difference but for many farmers, the local  irrigation network cannot accommodate the change. From Waste to Greenhouse Gas–to Energy? Organic matter decomposing deep inside a landfill produces methane, which is normally vented out and released into the atmosphere. It’s an important enough problem that landfills are the third largest source of methane emissions in the United States, according to the EPA. Fortunately, an increasing number of facilities capture  the gas and route it to a plant that uses a boiler to produce electricity with that waste gas. Methane Coming From the Cold As Arctic regions warm up quickly  methane is released even in the absence of direct human activity. The Arctic tundra, along with its numerous wetlands and lakes, contains large amounts of peat-like dead vegetation locked in ice and permafrost. As those layers of peat thaw, microorganism activity picks up and methane is released. In a troublesome feedback loop the more methane there is in the atmosphere, the warmer it gets, and more methane is released from the thawing permafrost. To add to the uncertainty, another worrying phenomenon has the potential to further disrupt our climates very rapidly. Under Arctic soils and deep in oceans large concentrations of methane exist entrapped in an ice-like mesh made of water. The resulting structure is called a clathrate, or methane hydrate. Large deposits of clathrate can be destabilized by changing currents, underwater landslides, earthquakes, and warming temperatures. The sudden collapse of large methane clathrate deposits, for whatever reason, would release lots of methane into the atmosphere and cause rapid warming. Reducing Our Methane Emissions As a consumer, the most effective way to lower methane emissions is by reducing our fossil fuel energy needs. Additional efforts include choosing a diet low in red meat to reduce the demand for methane-producing cattle and composting to reduce the amount of organic waste sent to landfills where it would produce methane.

The Journey Essays

The Journey Essays The Journey Essay The Journey Essay If someone offered to pay all my expenses for a months holiday anywhere in the world, I would feel very surprised and excited. It would be difficult to decide where I wanted to go. Should I go to one place or lots of different places? If I went to one country, I could see and understand a lot about it. If I went to lots of countries, my holiday would be more interesting and more exciting. I think I would decide to fly around the world and to visit three different countries. The countries I would visit would be Australia, the United States of America and Kenya. If I went to Australia, I would stay there for about two weeks. I am sure it would be very interesting to visit a country which is so different from my own. I would spend one week visiting Aboriginal tribes in the northern part of Australia. I would really like to find out how the Aboriginal people live in Australia today. While I was visiting Australia, I hope I could also see some of the large cities, such as Sydney and Melbourne. If I went to the United States I would stay there about a week. I expect I would start by visiting New York. I have heard that New York is a very exciting city. I imagine that there are lots of interesting things tourists like very much, that the buildings are greatly out of the ordinary and that the food is very varied. After I had stayed two or three days in New York, I would fly to San Francisco. I hope I could stay with my relatives who live there and I would visit the city and other parts of California. Finally, I would fly to Kenya where I would stay for about a week. There are three things I would like to do in Kenya. First, I hope I could visit the coast. I would go the great and old Arab cities that have risen from the sand.

Activity Analysis #6 - Newspaper Article Review Essay

Activity Analysis #6 - Newspaper Article Review - Essay Example Even as a strong set up it was, the sudden loss of seven of its employees jolted the management structure and the company was forced to freeze its operation for a week. The reports of officials said Mr. McDermott; the accused apparently had no permits for possessing the weapons. However, the man had never been arrested for any criminal breach. The victims were of different regions of residence and were no way in possession of professional dealings with the accused. Sources also revealed that the man had lived a secluded life away from relationships. However, there are no factors predictive of workplace violence present in Edgewater case. The report of the shoot-to-death case was subsequently attached to case registers of various other issues of homicides occurred in different locations across the United States of America. Texas, Tampa, Honolulu, Alaska, Atlanta, Newington, California and Los Angeles had marked records of such happenings of industrial dispute resulting in manslaughter at famous companies. Although the reason behind the impulsive killing instinct is inexplicable, investigating authorities depend on the behavioral patterns of the accused to find out the reasons for such heinous acts in various cases to record and store for further references of repetitions of such incidents. Work place violence (WPV) refers to violence that originates from employees or employers. Work place violence is identified as the second-leading cause of homicide in the United States of America; for instance, almost 1000 workers are killed each year at workplace (Fisher & Lab, 2010, p. 1072). Violence in the work place is a serious safety and health issue. A clear definition of WPV can be read out as incidents where people are abused, threatened or assaulted in circumstances relating to their work, involving an explicit or implicit challenge to

Conflicts Identification Essay Example | Topics and Well Written Essays - 750 words

Conflicts Identification - Essay Example The rules and regulations of Roman Catholic Church has made the number of churchgoers dwindle over the years, and has created identity crisis and many other ‘sins’ in the society. There is absolutely no doubt that the children of divorced parents feel alienated in Roman catholic churches because the church teachings and biblical references do not recognise divorce anywhere, whereas the society, popular culture, media, TV and cinema treat divorce as a regular norm in the society. Naturally these conflicting identifications worry the children of divorced parents because religion seems very orthodox and static, while the society, media, people have moved forward. At the same time, in another issue of homosexuality, Roman Catholic churches have remained firmly against it as human abhorrence, whereas the western society has moved on and accepts homosexuality as one of the variations of human desire that need not bring shame like in olden days. So, once again, homosexuals as well as the society wonder about the identities of homosexuals. In a way, religion could be sending the wrong signals as an institution that is rigid, unbending, closed, old and ancient. In addition children of second marriage find themselves in a very difficult quandary, because their parentage is not recognised by the Church. "Contracting a new union, even if it is recognised by Civil Law, adds [to the seriousness of the situation]; the remarried spouce is then in a situation of permanent adultery. If a husband, separated from his wife, approaches another woman, he is an adulterer, because he makes that woman commit adultery also," Cleave (2002, p.17). "A theological metaphor that richly describes the complex experience of children of divorce is the biblical story of the exile. As divorced parents are swept up into rebuilding their lives, their children often feel relegated to the margins". http://www.religion-online.org/showarticle.asptitle=2169 This could create psychological problems, inadequate learning capabilities and lack of focus in children. As they grow up, and come to know that they are unappreciated by the Church, this could either lead to defy the church, which under the circumstances, need not be a bad happening, or they pine for the approval of the church, which will never be found. Returning to the topic of homosexuality, it has remained one of the burning issues in the Church, which has not been moved forward even an inch for almost centuries now. "The official hierarchical teaching of the Roman Catholic church condemns homosexual genital behaviour since its criterion for the moral use of genital sexuality is within a heterosexual marriage" Curran (2001, p.329). Many Catholic moral theologians have called for a change in the Church outlook; but till now no such change has taken place. All this is happening, in spite of the ready knowledge that nearly 50% of the catholic priests in America are homosexual. The problem here is the belief of the church that if there is no procreation, there should never be any physical relationship. If this firm underlying principle had not been there, any kind of physical relationship should be agreeable to the church. This rigidity has created an identity crisis for the homosexuals, who could be harassed, ill-treated, discriminated, and even assaulted and for all these inhuman treatments, Church stands as a silent supporter, when it reiterates: "Every human being is called to receive a gift of divine sonship, to become a child of God by grace. However, to receive this gift, we must reject sin, including homosexual behavior-that is, acts intended to arouse or stimulate a sexual response regarding a person of the same sex. The Catholic Church teaches that such acts are always violations of divine