Cell Specialisation

All electric cells are intentional to perform a particular job within an organism, that is, to sustain life. Cells can become specialized to perform a particular function within an organism, usually as part of a larger tissue consisting of many of the same cells working together for example muscle-builder cells. The cells combine together for a common purpose. All organisms will contain specialised cells. There are hundreds of types of specialised cells. Below is listed some of the major ones put up in plants and animals.Plant Cell differentiation. Guard cells (a pair form a stoma hole) kidney shapes cells that change shape depending on wet content. Regulate the exchange of gases in and out of the plant, and the amount of water lost through the leaves of the plant. Pollen grains circular cells with an extremely hard protective cell wall containing spermatozoon cells, pollen grains germinate when they come in contact with female stamens, producing a pollen tube through which th e sperm travel to reach the ova (ovary). These pollen tubes can easily be seen in a corn cob. commencement hair cell designed to increase the surface area of the root for absorption of water and mineral nutrients into the plant. These cells move over a very thin cell wall that is fully permeable that allows the absorption of mineral nutrients as ions by cation and anion exchange. Contain large vacuoles for the short term storage of these nutrients. Epidermal cells feature a waxy cuticle (covering) to help prevent water loss from the plant, the cells on the top side of the leaf tend to be more waxy payable to higher exposure to the elements.Palisade cell (mesophyll) designed for photosynthesis, it is a tall cell with a large surface area contained many chloroplasts. Located on top side of the leaf in plants to allow optimum absorption of light and carbon dioxide (inputs for photosynthesis). Xylem and Phloem cells (combined referred to as vascular bundles) cells responsible for the transport of water and nutrients around the plant. Vascular bundles are located in a ring around the outside of the stem in higher order plants. This provides structural project for the plant (plant can die if ring barkedas equivalent to strangulation ).Xylem carries water and mineral ions up through the plant to the leaves. The phloem transport products of photosynthesis to other areas within the plant for storage (growth). Stone cells (sclereids) extremely hard to provide protective covering to the seed in stone fruit. Animal Cell Specialisation White blood cells (phagocytes) part of the bodys immune system, it is responsible for engulfing, breaking down foreign material (bacteria)and cellular debis in the blood in a process called phagocytosis. They are highly mobile, able to move between body cells.Red blood cells have no nucleus and contain haemoglobin, the iota that carries the oxygen around the body to the cells undergoing respiration. Red blood cells with a high ox ygen content appear bright red, with low oxygen concentration low-spirited blue/red. Retina cells the cone and rod shaped cells of the retina are sensitive to light. These cells send electrical messages via the optic nerve to the brain. Muscle cells (fibres) these cells are long and smooth in structure. The flexible nature of the cell allows them to move by contracting and expanding.This contractile ability allows to cell o quickly change length. Microvilli (cells lining the small intestine) these cells have finger wish extensions to the surface of the cell to allow greater absorption into the cell by increased surface area. Nerve cells these cells are elongated with trendril like extensions at each end, and capable of transmitting electrical impulses along the cell body. These electrical impulses are able to contract muscle fibres and stimulate brain cells. Cilia picayune hair like cells designed to prevent damage to the lungs by airborne particles.Cilia cells line the surfa ce of the nasal passages and secrete a mucas (snot), a sticky significance that collects the dust particles captured by the hairs , where it is swept towards the back of the throat and then swallowed. Sperm cells designed to fertilise egg cells, they are very small with a potty to allow movement by swimming. The head of the cell contains enzymes that can digest the outermost surface of the egg so that the two nuclei can fuse. A sperm cell contains half the number of chromosomes of the parent organism (genetic material from the father), which will be passed onto the offspring.Ovum (egg cell) designed to be fertilized, the cell is large, bulky and not designed to move easily. Like the sperm the ova contains half the number of chromosomes of the adult organism (mothers genetic material). The ova contains a large food store in the cytoplasm, need for the developing offspring once the ova has been fertilized. Osteocyte (bone cell) calcium carbonate and calcium phosphate are deposi ted around the outside of the cell to form a hard outer covering (bone).

An Exploration of the causes and effects of obesity Essay

Obesity is excess body fat. It is usually defined by body plentitude index (BMI) which is individuals weight (kg) divided by their squ atomic number 18s of height (m) (Jebb, 2004 Eagle et al, 2004). At the very(prenominal) time, BMI was classified into four conditions. Firstly, when the BMI less than 18.5 kg/is underweight. Secondly, 18.5 kg/to less than 25.0 kg/ belong to normal weight. Thirdly, overweight is 25.0 kg/to less than 30.0 kg/. Finally, exceeding 30.0 kg/ is totally fat (Eagle et al, 2004). opposite papers categorise to a greater extent detailed in the part of round, which sections three parts, such as, Grade I fleshiness (30.0 kg/to less than 35.0 kg/), Grade II fleshiness (35.0 kg/to less than 40.0 kg/) , extreme obesity or Grade lead (40.0 kg/or more) (Borrell and Samuel, 2014). Obesity has been defined as an epidemic by the International Task Force on Obesity and World Health Organization in the 21st pennyury (Jimnez, 2011). For example, 65 per cent adults a nd 15 per cent children are overweight in America, and this data has non a decreasing trend (Jimnez, 2011).In recent years, increasing obesity problems welcome emerged in developed countries and dismantle in round city centers in developing countries (Jimnez, 2011). According to Rosins investigation (cited in Tomer, 2011), incidences of obesity in the United States are high and have been dramatically increasing over the past thirty years, although there are some steady trends recently (Rosin in Tomer, 2011). For instance, the percentage of the obese population in America rose twice from about 13.95 per cent (in 1976) to 29.57 per cent (in 2000), and this figure is continuing to grow (ibid). However, enumerates of obesity are not only in America it is growing in all of the homo beings even in Japan which has one of the lowest rates in the world (Bleich et al in Tomer, 2011 Delpeuch et al in Tomer, 2011).This quiz consists of four sections, including introduction, effects o f obesity, causes of obesity and conclusion. It allow for focus on the effects and causes of obesity. On the one hand, it analyses that twain aspects of negative impacts which are shoemakers last rate and chronic conditions are caused by obesity. On the separate hand, this article discusses the coordination compound motives of obesity, which are classified as the essential factors and acquired factors respectively.Effects of obesityNowadays, increasingly, passel have been focused on obesity bringing to serious impacts of health. The effects of obesity can be classified into 2 parts. One is the relationship of obesity and death rates another is the relationship of obesity and chronic conditions (Tomer, 2011). It is claimed that the mortality risk and premature deaths are influenced by obesity epidemic amid American adults (Borrell and Samuel, 2014). Some data portends 300,000 premature deaths per year are connected with obesity in America (Tomer, 2011). Furthermore, there i s a school of persuasion that obesity is a chief(prenominal) risk factor for many chronic conditions. there are known as the Western distemper including type 2 diabetes, cardiovascular disease (CVD), certain types of cancer, hypertension and hypercholesterolemia (Rosin in Tomer, 2011). Let us now discuss two aspects of negative impacts.The relationship of Death straddle and ObesityThere is a possibility that obesity will decrease individuals lifespan by 3 to 13 years on average (Jimnez, 2011). Mortality might be greater and greater when the obesity phenomenon becomes serious in the future. Over the past five decades, obesity has been related to morbidness or all-cause mortality which means death rates caused by diseases, except for taking dugs and suicide, in the United States and elsewhere (Borrell and Samuel, 2014). Firstly, compared with a normal weight individual, obese adults have at least 20 per cent higher rate of dying for all-cause (Borrell and Samuel, 2014). Further, an obese individual who is Grade I obesity will die out earlier at least 1.6 years than a normal-weight individual considering all causes (ibid). At the same time, this figure for Grades II and III obesity person are 3.7 years (ibid).Secondly, base on Borrells research data, when individual who is overweight and obese (regardless of the grade) get the CVD disease, it can be found out that these individuals dying rate will be significantly higher than individuals who have normal weight (Borrell and Samuel, 2014). After studied individuals who were different race and have different education backgrounds, the research acquired it one final result that obese individuals might have a shorter life than normal-weight individuals for CVD-specific mortality and the same phenomenon could exist in different ages people(ibid).In addition, the insidious situations were the worst in obese adults whose ages are in the midst of 45 and 64 for all-cause and CVD-specific mortality (Borrell and Sa muel, 2014). It means that Grades II and III obese adults aged 45 to 64 years have significantly higher death rates than people who have normal weight. These higher death rates lead to among Grades II and III obese adults (45 to 64 years old) early death by at least 7 years (ibid). Through a great many prospective studies, it is widely accepted that obesity contributes to premature death. Apart from, obesity has other disadvantages to individuals.The relationship of Chronic ConditionsObesity might raise some diseases hazard and the biggest main risk is cardiovascular disease (Jebb, 2004). There are these who maintain that, in public health terms, the largest burden of disease is morbidity which is related with obesity and most every organ of human body is caused by obesity (Jebb, 2004). Jebb (2004) states that It effects take on metabolic syndrome (type 2 diabetes, hypertension and hyperlipidemia), and mechanical disorders (e.g. osteoarthritis, respiratory problems, sleep apnoea) and psychosocial disorders (Jebb, 2004). Other scholar has a similar view that it is a significant problem that obesity is not only one of the endocrine-metabolic conditions but in addition is a kickoff of a series of diseases including type 2 diabetes mellitus, cardiovascular diseases, metabolic syndrome and some types of cancer in public health (Jimnez, 2011). Let us detail that those relationships between obesity and the following diseases.Firstly, there is an extremely close relationship of type 2 diabetes and obesity. Diabetes belongs to metabolic syndrome, which causes the factors of atherosclerotic disease (Jebb, 2004). Further, the development and severity of this kind of disease is depending on weight accession (ibid), thus obesity is an important element factor. For example, women whose BMI is 25 kg/ lead to the probability of diabetes is just five-fold, if the BMI is over 35 kg/, the probability will increased to more than 40-fold (Jebb, 2004). Furthermore, the probabi lity of diabetes still depends on different bodyshapes, such as, apple-shaped, pear-shaped, if women have a similar BMI. Jebb found apple-shaped women who have a large waist are higher diabetes risk than pear-shaped women who have excess fat on the thighs and hips (Jebb, 2004).Secondly, cardiovascular disease is also think with obesity or weight increase. The Nurses Health Study suggests that BMI is associated with cardiovascular disease (Jebb, 2004). Compared with the risk of CVD at BMI less than 21.5, the risk rose from BMI 22-23 and doubled at 25-28.9 and more than three times higher when the BMI reached at above 29 (ibid).Thirdly, the recent year have a growing recognition which is the relationship between obesity and increased risk of most types of cancer, with the exception of lung cancer, postmenopausal breast cancer, colon and kidney cancer (Jebb, 2004). At the same time, it is estimated to ascribe 20 per cent of cancer deaths in women to obesity (ibid). It seems that the l ink between cancer and obesity is confirmed.To sum up, obesity is a serious global problem. To some extent, it became a killer to put to work human beings die prematurely. In recent years, people have begun to pay close attention to this topic. But what caused the obesity is the key point, which is worth us to explore the side by side(p) section will analyze some important factors that lead to obesity.Causes of obesityThe causes of obesity are extremely compound. A huge number of research indicate that the reason of obesity is not a single result. People are obese because of the complex interaction between genes and the unique personal habits (Eagle et al, 2004 Jimnez, 2011 Tomer, 2011). Firstly, genes are not only crucial factor for obesity, but the environment also plays an important role (ibid). At the same time, genes will be changed with parental unique life-style and their surrounding (Eagle et al 2004 Jimnez, 2011). Secondly, the unique personal habits involve numerous asp ects, such as, diet, choice habit, sedentary life style and other social factors (Tomer, 2011). It seems that the causes of obesity are complex and constantly changing. To sum up, these reasons are divided into two major categories,congenital and acquired factors. This section will detail how two kinds of factors can make individuals obese.Congenital factorsThere is no doubt that genes are one of the causes for obesity. Nowadays, sufficiently solid scientific severalize provides that genes are involved in the development of obesity (Jimnez, 2011). It is determined that individuals metabolism, detoxification and occupation of hormones could increase their weight and make them obese (Tomer, 2011). For instance, some small parts of obese individuals owes to genes which lead to some clinical syndrome. Obesitys monogenic reasons include mutations in the leptin gene and its receptor, or the melanocortin system. Other genetic syndromes are a common element of the phenotype. However, the se occupy only small parts (Jebb, 2004). At the same time, heritability studies indicate that genetic factor is only influenced approximately a third of the variance of BMI (ibid).Therefore, it is claimed that genes are just potential inducers for obesity (Jimnez, 2011). On the other hand, even some scholars maintain that obesity is the result mixed up with certain genes and the environment. Genetic changes produce a new trend that obesity is a result of the interaction between genes and environment (Jimnez, 2011). It means that the new gene will be decided jointly by the previous generation of genes and environments. Furthermore, a mass of other candidate genes have been associated with obesity. For example, food preferences or exercise habits (Jebb, 2004).Acquired factorsCompared with congenital factors, acquired factors are more influenced for obesity. It is reflected in the peoples diet, behavior patterns and many other aspects (Eagle et al, 2004 Jimnez, 2011 Tomer, 2011). Jimn ezs view is that due to a long time energys accumulation which is energy intake exceeds people needs, there are some obese people. Two crucial behaviors are food intake and taking exercise resulted in obesity (Jimnez, 2011). Hyman (cited in Tomer, 2011) states that there are three dietetic reasons producing obesity, including diet high in refined, processed carbohydrates, diet high in bad fats and diet low in fiber (Hyman in Tomer, 2011).However, Brownel (cited in Tomer, 2011) reason out that powerful forces of society and culture are the root of the obesity problem, because it can promoteindividuals selecting high energy diet and a sedentary lifestyle (Brownel et al in Tomer, 2011). Over the past three decades, the obesity issue was aggravated by this kind of environment (Brownel et al in Tomer, 2011). It is worth noting, these effects will not make everyone change their eating habits it depends on different people. Apart from genes, if someone understands nutrition very well, th ey may escape the effect of environment. Nevertheless, unfortunately a great many people are vulnerable to the toxic environment impact (Brownel et al in Tomer, 2011).This next section will minutely relieve the acquired factors of obesity, including eating habits, less activity and watching advertisements on television. Owing to some poor eating habits, there were so many obese people (McLannahan and Clifton, 2008 p28). In the first place, different foods provide different extent energy, so that intake energy more than their need lead to obesity. For example, when individuals eat more than their need in their daily life, they will become fatter (McLannahan and Clifton, 2008 p29-31). It demonstrates that excess foods intake caused excess body weight (McLannahan and Clifton, 2008 p29). In the second place, energy-dense diet is an important reason for make people obese. Energy-dense diets are high in fat, high in added sugars and low in fruit and vegs and this kind of diet could enha nce the probability of obesity (Jebb, 2004).Fast foods are typical energy dense diets, and these are acknowledged to be a risk factor for obesity (Niemeier et al in Musaiger et al, 2014). Musaigers research showed that as a result of the high consumption of fast food, there was an increase trend about obesity (Musaiger et al, 2014). At the same time, a report was carried out by Gortmaker (cited in Musaiger et al, 2014), a high consumption of soft drinks was proved to be a reason for obesity.It is concluded that sugary beverages are less satiating than solid food containing similar calorie values, therefore it contributes to acquire more energy (Gortmaker et al in Musaiger et al, 2014). In addition, there is a school of thought that eating more fruit and vegetables are beneficial to decrease the probability of obesity (Musaiger et al, 2014). For instance, in the United States, 12-year old boys and 11-year-old girls watchd any fruits and vegetable occupied 56.1 per cent and 65.5 per cent respectively (Eagle et al, 2004). It may be explained that nearly half children do noteat any fruits and vegetable, and it boosts the number of obese children. some other important reason is lack of activity. Nowadays, modern people living in developed societies do not take more exercise than their ancestor (McLannahan and Clifton, 2008 p28). It is realistic lead to obesity. Hyman (cited in Tomer, 2011) provides that a sedentary pattern can make weight gaining, through the lower metabolic rates (Hyman in Tomer, 2011). Moreover, some evidence indicates that the awareness of the innate appetite control system can be strengthened by high levels of physical activity. In the mean time, it is easier to automatically make energy intake and energy needs balance (Jebb, 2004). This is a key issue that increases in obesity can not be simply attributed to over-eating or inadequate activity, rather it represents a failure of the homeostatic mechanisms to precisely match energy intake to th e bodys energy needs (Jebb, 2004).Furthermore, exercises levels are also important. People whether willing to do exercise is a main factor of energy needs (Jebb, 2004). For example, if a person who is a skilled worker has a sedentary life, driving a car commuting and not seeking leisure activity, their basal metabolic rate may be used just 30 per cent (Jebb, 2004). On the contrary, a generally active adult may expend about 60 per cent and a particular active sportsman can consume double her or him basal energy needs (Jebb, 2004). It can be seen that doing more activity contributes to consume more energy, particularly helping to maintain insulin sensitivity and reduce the risk of obesity.Furthermore, in the recent year, people spend more time on earnings and watching television. Therefore, high-tech environment brings some influences to make people obese. The Henry J Kaiser Family Foundation indicates that adverts on television have effects on childhood obesity levels (Musaiger et al, 2014). At the same time, according to the American Psychological Associations report, children less than 8 year olds do not distinguish the contrariety between adverts and reality (Musaiger et al, 2014). Through displaying some advertisements which some stars eating delicious foods makes a condition reflection, so that people who watches advertisements may eat more foods, and it causes an increase of intake energy, especially if people repeatedly watches these advertisements on television (Eagle et al, 2004).Actually, is utilizes the changeless relationship of stimulus and response in humans brain, according to real Conditioning theory (Eagle et al, 2004). When people watches television, it equivalently irritate people awareness that need eating snack or meals. Thus watching television is a centering to cause intake more energy and make people obesity. Further, advertisements on television not only boost people eating but also have negative impacts on food choices of viewers . To some extent, it caused people preferring to choose higher fat and higher energy foods (Eagle et al, 2004). To sum up, watching television leads to people become obesity.As discussed above, there is a dramatic rise about obesity in many countries nowadays, due to the complex interaction of a smorgasbord of reasons, divided to congenital causes and acquired factors (Wright, 2012). Moreover, obesity has many negative impacts on human health. It represents in higher death rate and many chronic conditions. The purpose of this raise is make people understand that these diseases have produced seriously harm to peoples health, and through explaining causes of obesity make people improve obesity problem. To be specific, the causes which lead to obesity are extraordinary complex, divided into congenital and acquired factors. There is no doubt that the congenital factor is genes result in obesitys development. Furthermore, the acquired factors involved many aspects, including diet, life behavior patterns and high-tech environment.This essay particularly has explained that three factors, such as eating habits, physical activity and watching advertisements on television, resulted in obesity. On the other hand, obesity is not only endocrine-metabolic disease, but also it is many other diseases start. For instance, some serious risks which are the premature death and morbidity of chronic conditions are caused by obesity. Firstly, about premature death, this essay used some data which compared different lifespan of different extent obese people and normal weight people, particularly middle aged and elderly people are particularly serious. In addition, in the part of chronic disease, this essay has analysed the type 2 diabetes, cardiovascular diseases and some types of cancer were produced by obesity. To sum up, obesity is a global problem. As a result of many complex reasons, there are increasing people became obesity. At the same time, obesity boosts rate of premature death andmorbidity of chronic conditions.ReferencesBorrell, L. and Samuel, L. (2014) Body Mass world power Categories and Mortality Risk in US Adults The Effect of Overweight and Obesity on Advancing Death, American Journal Of Public Health, 104 (3) 512-519, SPORTDiscus with Full Text, EBSCOhost, viewed 18 haughty 2014.Eagle, L, Bulmer, S, Kitchen, P. and Hawkins, J. (2004) Complex and controversial causes for the obesity epidemic The role of marketing communications, International Journal Of Medical Marketing, 4 (3) 271-287, Business Source Complete, EBSCOhost, viewed 18 terrific 2014.Gonzalez Jimenez, E. (2011) Genes and obesity a cause and effect relationship. Endocrinologa y Nutricin (English Edition), 58 (9) 492-496, Available from http//www.sciencedirect.com.proxy.library.lincoln.ac.uk/science/article/pii/S2173509311000602 viewed 18 overbearing 2014.Jebb, S. (2004) Obesity causes and consequences. Womens Health Medicine, 1 (1) 38-41, Available from http//www.sciencedirect .com.proxy.library.lincoln.ac.uk/science/article/pii/S1744187006000102 viewed 18 August 2014.McLannahan, H. and Clifton, P. (2008) Challenging obesity. 1st ed. Oxford Oxford University Press, 28-31, viewed 18 August 2014.Musaiger, A, Al-Roomi, K, and Bader, Z. (2014) Research report Social, dietary and lifestyle factors associated with obesity among Bahraini adolescents, Appetite, 73, 197-204, ScienceDirect, EBSCOhost, viewed 18 August 2014.Tomer, J. (2011) What Causes Obesity? And Why Has It Grown So Much? Challenge(05775132), 54 (4) 22-49, Business Source Complete, EBSCOhost, viewed 18 August 2014.Wright, S. and Aronne, L. (2012) Causes of obesity, Abdominal Imaging, 37 (5) 730-732, Scopus, EBSCOhost, viewed 18 August 2014.

Poem ‘About His Person’ Essay

How does Armitage take in the poem About his Person particularly travel to you. The poem About his Person is a poem about a man who commits suicide. We are not given exactly how or why straightforwardly still we are given the items he had on him when he did it. Its by dint of the items we get to understand why he did it. Armitage figure outs this poem moving through doing that and also using other techniques. One way in which Armitage makes the poem moving is by letting the reader piece together the story behind his possessions. This can be shown when it says No gold or silver but vest one finger. This suggests he was recently divorced due to his ring on his finger not being there and because of that reason he could tolerate killed himself. Another way in which Armitage makes the poem moving is by letting the items speak for themselves. This can be shown when it says Five pound fifty in variety show exactly, a program library card on its date of expiry.These words say exac tly what they mean. He has only 5.50 to his name and an out of date library card. He has barely enough money to live on, to buy the daily essentials like food and water but not even enough to fabricate rent for an accommodation. This is why it is particularly moving as it shows us the conditions he was living in. Armitage also makes the poem moving by using random objects to make what happened seem unplanned. For example it says But beheaded in his fist, a shopping list. This makes the poem moving as it shows that he had only recently contumacious to kill himself that day as he had a shopping list in his hands which most likely would set about been the shopping he faculty of done that very day he killed himself. By including this he makes the poem moving as it makes us think what tragic event must have happened to him in that very same day for him to kill himself. The use of a short reflective sentence at the end of the poem also helps to abide to making this poem moving.For in stance it says in the poem That was everything. This helps to make it moving as this short sentence indicates that his life is now over, just like that. It makes us feel sorry for him as it just happened quickly and that everything he had, had basically disappeared. This is why is makes it moving. Armitage also uses 2 line stanzas which are short and sharp to make the poem moving. This can be shown when it says A final demand, in his own hand. This is moving because the sentences are short and sharp so that it sticks in the readers heed about what is happening, and creates food for their thoughts. They have to figure out what is happening in all(prenominal) stanza.It also has a great detail of sorrow in each stanza about why he did it, which also helps to make the poem moving. Another way Armitage makes the poem moving is by using rhymes and half rhymes. This is apparent in the poem when it says A postcard stamped, unwritten but franked. This makes the poem moving because he recei ved a postcard that he had received from someone but blank. Which shows that someone had not made up their mind about what to say to him but he could of recognised the writing on the address and knew who it was from like a calling card, which could of drove him to his suicide. By including this it makes the poem moving, as it makes us feel sad. Overall this poem is very moving as it is explaining why this man killed himself, through the items he had on him. This was done by many ways, through rhymes and the way it was written, and is very moving.

Calcium Carbonate and Ca2+ Ions

Experiment. EDTA Titration of Ca2+ in an incomprehensible solution Experiment. EDTA Titration of Ca2+ in an mystical peeing standard special 9/2012 Objective The most common multivalent coat ions in natural waters are Ca2+ and Mg2+. In this experimentation, you will find the total tautness of calcium ions that can react with EDTA with the assumptions that EDTA reacts 11 with metal (Ca2+) ions. Equipment 250-mL Erlenmeyer flask (3) 50-mL Buret Ring-stand and hardware Desiccator 400-mL Beaker 500-mL Vol. flask 250-mL Vol. flask 1. 0-mL Vol Pipette coke-mL Grad cylinder gamy plate Safety and Waste DisposalChemicals Buffer (pH 10) Add 142 mL of 28 wt % aqueous NH3 to 17. 5 g of NH4Cl and dilute to 250 mL with water. Eriochrome black T index number Dissolve 0. 2 g of the solid indicator in 15 mL of triethanolamine plus 5 mL of absolute ethanol. 50 wt % NaOH Dissolve 100 g of NaOH in 100 g of H2O in a 250-mL plastic bottle. Store tightly capped. When you remove solution with a p ipet, try non to disturb the solid Na2CO3 precipitate. Discussion Hard water is due to metal ions (minerals) that are dissolved in the ground water. These minerals include Ca2+, Mg2+, Fe3+, SO42-, and HCO3-.Generally hard water arises because rainfall moves through limestone, CaCO3 underground that occurs in our area to the aquifer. This is why we measure hardness in terms of CaCO3. The concentration of the Ca2+ ions is greater than the concentration of any other metal ion in our water. The aim of water hardness is r exposeinely used to measure the quality of water that the general public uses. Originally, water hardness was defined as the measure of the capacity of the water to precipitate soap. Hard water is not a health hazard since the main chemical in hard water is calcium.People regularly take calcium supplements. In fact, hard water can be a source of necessary minerals (calcium and magnesium) that is necessary for good health. Indeed, the National academy of Science go so far as stating that that consuming extremely hard water could be a major contributor of calcium and magnesium to the diet. The problem with hard water is that it cause soap methamphetamine hydrochloride, clog pipes and clog boilers. Soap scum is mixed baged when the calcium ion binds with the soap. This causes an insoluble compound that precipitates to form the scum you see.Soap actually softens hard water by removing the Ca2+ ions from the water. When hard water is heated, CaCO3 precipitates out, which then clogs pipes and industrial boilers. This leads to malfunction or damage and is expensive to remove. There are ii types of water hardness, temporary and permanent. Temporary hardness is due to the bicarbonate ion, HCO3-, being present in the water. This type of hardness can be removed by boiling the water to expel the CO2, as indicated by the following equation HCO3- (aq) ? H2O (l) + CO2 (g). Because bicarbonate can be removed it is classified as temporary hardness.Permanen t hardness is due to the presence of the ions Ca2+, Mg+2, Fe3+ and SO4-2. Because boiling cannot eliminate this type of hardness, the water is said to be permanently hard. The card below shows the pointedness of hardness of the water in terms of its calcium carbonate concentration in ppm and grains. Hardness rating Soft Medium Hard Hard rattling Hard denseness of Calcium Carbonate (mg/L or ppm) 0 75 75 to 150 150 to 300 300 and greater minginess of Calcium Carbonate (grains/US gallon) 0 to 5. 2 5. 2 to 10. 5 10. 5 to 21 21 and greaterPermanent hardness is usually determined by titrating it with a standard solution of ethylenediamminetetraacetic acid, EDTA. The EDTA is a complexing, or chelating agent used to capture the metal ions. This causes water to soften, but the metal ions however, are not removed from the water. EDTA only when binds the metal ions so that the ions do not precipitate to form soap scum. EDTA is a versatile chelating agent. A chelating agent is a sub stance whose counterspyecules can form several bonds to a single metal ion. Chelating agents are multidentate ligands.A ligand is a substance that binds with a metal ion to form a complex ion. Multi-dentate ligands are many clawed, holding onto the metal ion to form a very s tabulate complex. EDTA can form four or six bonds with a metal ion. It is frequently used in soaps and detergents because it forms complexes with calcium and magnesium ions. The ions in hard water are bound to the EDTA and cannot interfere with the cleaning action of the soap or detergent. EDTA is too used in foods. Certain enzymes are responsible for food spoilage. EDTA is used to remove metal ions from these enzymes.It is used to promote deform retention in dried bananas, beans, chick peas, keep clams, pecan pie filling, frozen potatoes and canned shrimp. It is used to improve flavor retention in canned carbonated beverages, beer, salad dressings, mayonnaise, margarine, and sauces. It inhibits rancidity in salad dressings, mayonnaise, sauces and salad spreads. In this laboratory you will be asked to determine the total permanent hardness. EDTA grabs all the metal ions in the water, not just the Ca2+ ions. This gives us a economic value that is not truly the concentration of Ca2+ ions.This causes an data-based error of about 1%, which is acceptable due to the fuzzy endpoints in this type of titration. Erio-T indicator or Eriochrome Black-T indicator is used in this titration. When it is chelated or acidifies, it produces a Pink-Red solution. When it is not chelated and under basic conditions it is Blue. The three pictures show the end point in this titration. There is a 1-drop difference of 0. 01 M EDTA among the first and second pictures and between the second and third pictures. Two or three seconds were allowed for colors in the second and third pictures to develop after adding the extra drop.In each(prenominal) case the solution was thoroughly mixed. This color change from w ine red to violet to blue is due to the compact nature of the complex. Experiment. EDTA Titration of Ca2+ in an unknown solution PROCEDURE Modified 9/2012 1. Dry Na2H2EDTA. 2H2O (FM 372. 24) at 80 C for 1 h and cool in the desiccator. Accurately weigh out 0. 6 g and dissolve it with heating in 400 mL of water in a beaker. Cool to room temperature pour into a 500-mL volumetrical flask. , mix and dilute to the mark. 2. You should practice finding the end point several times by adding a little tap water in a clean beaker and titrating with EDTA.Save a solution at the end point to use as a color comparing for other titrations. 3. Pipet a 1-mL sample of unknown into a 250-mL flask and fill to the mark with deionized water. Mix thoroughly. From this 250-mL subscriber line solution draw 4, 50mL aliquot samples and place each aliquot in 250mL Erlenmeyer flasks. To each sample, add 3 mL of pH 10 buffer and 6 drops of Eriochrome black T indicator. To the first 50-ml solution, titrate with EDTA from a 50-mL buret and note when the color changes from wine red to blue. 4. Repeat the titration with the next three samples to find an accurate value of the total Ca2+ concentration.Perform a blank titration with 50 mL of distilled water and set off the value of the blank from each result. 5. Upon completion of the experiment, discard all solution in a chemical waste bottle and wash out the glassware. Be sure to dry your buret in the upside down position.Calculations Analysis Analyte Ca2+The reaction of Ca2+ ions with H2EDTA2- takes place with a 11 stoichiometric ratio Ca2+ + EDTA2- ? At the end point of the titration, 1-equivalent of Ca2+ reacts with one equivalent of H2EDTA2-. 1 eqv Ca2+ = 1 eqv H2EDTA2- equivalent Ca2+ = H2EDTA2- Vol EDTA CaH2EDTA. Recall that the analyte (we call this unknown solution) was prepared by taking exactly 1-mL of the unknown solution and diluting in a 250-mL volumetric flask (we will call this the stock solution) 50-mL aliquot (call this the analyte) of this solution was then titrated against EDTA. Note that the analyte concentration is equal to the stock solution concentration. The mass Ca2+ in 1 mL aliquot unknown Mass of Ca2+ in 50mL Sample = H 2EDTA2? $ Vol EDTA $ = mol H 2EDTA2- = mol Ca2+in 50mL Analyte % % Mass of Ca2+ in 1mL of unknown = mol Ca2+ ? 250mL aliquot Ca2+ __ g Ca2+ ? 50mL Analyte mol ? ? Dilution Factor Atomic mass Ca Mass of Ca2+ in 1 L solution Mass Ca2+ in 1 L = mass Ca2+ in 1 mL Aliquot 1000 mL 1 mL ingress of unknown by percent (mv), parts per hundred (mv) and Molarity (M) Mass Ca in 1mL aliquot Vol aliquot solution used % Ca2+ mv = 100 ppm Ca2+ mv = Mass Ca in 1mL aliquot Vol aliquot solution used 106 Molarity Ca2+ = mass Ca2+ in 1mL 1 mol Ca __g Ca ? ? ? molar mass Ca 1 Volume in L of unknown Aliquot used Mass in grams of calcium carbonate unknown in 1L solution Mass CaCO 3 in 1-L = mass ppt (g) 1 mol CaC 2O 4 H 2O __ g CaC 2O 4 H 2O ? molar mass CaC O H O 2 4 2 1 mol CaCO 3 1 mol CaC 2O 4 H 2O 1 mol CaCO 3 Vol in L of aliquot ? ? ? ? Molar mass CaCO 3 __ g CaCO 3 1L Dilution Factor statistical Analysis 1. story the mean, medium, standard deviations (s), relative standard deviation (RSD), variance (s2) and the 95% confidence interval for your results. 2. 3. 4. Apply the students t test at the 95% confidence interval Apply a Q-test to any suspected result. Confidence interval = x + ts n 5. Compare the results of this experiment to the previous experiment, Gravimetric determination of Ca. Apply the Comparison of Means with disciples t, Case2 (p76) Comparing Replicate Measurements. Do the two methods agree inwardly the 95% confidence interval? rivulet for Outlier Apply a Grubbs Test and Q-Test for any suspected outliers at 95 % level. See page 83 of text for critical values for 95% confidence.If your results show an anomalous data then use the Q-test to determine if the result should be rejected. Q= (Suspected Value Nearest Value) (Suspected Value Furthest Value) G calc = Questionable value x s Table of Data, Results and Statistical Analysis Calcium Raw Data 1. Unknown number 2 Mass of EDTA used 3 Concentration of EDTA 4 Volume of Unknown Ca2+ Solution 5 Volume EDTA during titration 6 Volume EDTA for blank trials 7 Q-Test (95%) of any outlier Analysis and Results 8 Mass of calcium in 1-mL aliquot (Average) 9 Mass of calcium in 1-L solution (Average) 10 Conc. of calcium, %, ppm (mv) and Molarity (Average) 11 Mass of calcium carbonate in 1-L (Average) Statistical Analysis 12 Averages and Standard deviations of all results 13 Variance, RSD and CV of all results 14 95% Confidence interval 15 ttable and tcalc for replicate measurementsDiscussionThe goal of this experiment was to determine the hardness of the unknown sample by calculating the concentration of calcium ions in an analyte solution. Correcting for dilution factors, the concentration of calcium in the unknown in g/L is to be determined and compared to analysis for calcium by EDTA titration. Statistical analysis is applied to the results. A password of this experiment should include the accuracy and precision of this experiment compared to the EDTA titration method. An analysis of a comparison of replicated measurement is performed and discussed. Table of results should include Include in your summary table the following i) Moles of Ca2+ in the unknown and the fair(a) equivalent value. ii) Concentration of Ca2+ in the unknown in molarity, ppm and g/L iv) Mean, standard deviations, RSD and CV for each of the above concentration units. v) Students t at the 95% confidence interval vi) Application of a G and Q-test to any suspected result at the 95% level. vii) ttable, tcalc, Conclusion on comparison of replicated measurements.Experiment. EDTA Titration of Ca2+ in an unknown solution Modified 9/2012 Sample data table. Sample Unknown ______ Mass Na2EDTA, (g) Molarity Na2EDTA, (M) Vol. unknown, (ml) Buret Volinitial, (ml) Buret Volfinal, ( ml) Volume EDTA used, (ml) Vol EDTA for blank, (ml) turn Col EDTA, (ml) Trial 1 Mass Ca2+ in 1 ml aliquot (g) Mass Ca2+ in 1-L solution (g) Concentration Ca (%) Concentration Ca (ppm) Molarity Ca2+, unknown (M) Mass calcium carbonate in 1L Q and G Test for Outliner CaCO3 (g/L), unknown Trial 2 Trial 3 Trial 4 Average Std dev Variance RSD , CV 95% CL Trial 1 Trial 2 Trial 3 Trial 4 Blank Students t Analysis Comparing replicate measurements Analysis A CaCO3 (g/L) 1 2 3 4 Trial 1 Trial 2 Trial 3 Trial 4 Avg Avg X1bar X2bar Sqrt ((n1*n2)/(n1+n2)) (xi-x1)2 deg freedom Spooled Expt 2 Expt 3 Ex2 (Xi-Xbar)2 Ex3 (Xi-Xbar)2 T calc t table Conclusion T calc ? T table, at 95%, two result are (not) considered to be different EDTA Titration of Ca2+ in an unknown solution. 1 2 CRITERIA (Tentative point distribution may change depending on experiment) Quiz / Homework NONE Introduction and ProceduresA. IntroductionObjective of Expt.Background information.Math relationship used in study.B. Proced uresOutline of procedures in Expt.Flow chart pictorial of procedures. Procedural changes.Information (data) to be recorded during experiment. (to be presented in Table form. )Safety and disposal information. This portion of the report should be turned in before the start of lab class (prelab discussion). Data, Observe. , Results and Calc.C. Data and ObservationData in table form. & detailed observations written in the table. All data entry should contain the proper number of significant figures and units. Data should always be recorded in an organize fashion.Balance chemical equations all chemical reaction which occurred during an experiment should be written in this fraction. Then it should also be written in the discussion portion of the report. This portion of the report should be turned in before you leave the laboratory.Calculations & ResultsD. CalculationsSample calculation shown with Excel spreadsheet available with formulas shownStatistical analysis of data and result. Avg, Std dev, RSD, CVE. ResultsSummary of Result(s) in table form. In this section accuracy of results is very important as well as detailed calculation showing how the result was obtain. Unknown will also be included in this section. Discussion / Conclusions and Post-Lab QuestionsF. Discussion (Talking points)What is your final result in this experiment. Are the four trials consistent with each other? If not what would mark for the inconsistencies? How did the results in this experimental result compare to the result in experiment 2? Is your result for the amount of calcium carbonate in your unknown within the range of 10 25 g/L? Elaborate on this. What is the average amount of calcium in tap water, how much more high is this unknown compared to the average content in tap water (express in %).G. ConclusionSummary of the goal of the experiment and how that goal was achieved in the experiment. H. Post-lab questions or Editorial commentWhat did you learn in this experiment? What skills in lab practice did you develop through this expt? This portion (Calculation and Discussion) is turned in at the beginning of class of the due-date Overall Presentation (of lab notebook)Lab technique during experiment example are, class preparation, safety glasses precautions and leaving the laboratory clean.Report presentation examples are the headings of each report that includes name, title, lab partner, date and section , witness signature. Legibility of report. Is the report easy to read or is important information jotted down by small print in the corners of the lab report. The general impression is important. Lab TechniqueSafety wear goggles, handle chemicals with caution, proper handling of lab equipmentLeave lab clean and tidy

Aspect Oriented Software Development

The capital punishment of package applications using GOAD techniques results in a better implementation structure which has an impact on many important softw atomic number 18 organisation qualities such as enhanced risibility and minify complexity. In turn, these softw be qualities work to an improved softwargon culture lifestyle and, hence, to better software. This report introduces to management and software suppuration staff to the concepts of formulation- orientation software culture.It presents why aspect-orientation is needed in modern software development and what its contributions are to the improvement of software forge and implementation structure. The report also highlight abdominal aortic aneurysm technology details though with come forth probing much in particular, as it present the various concepts of GOAD. after(prenominal) reading this introduction, the reader will understand what GOAD is rough, know its key concepts and terminology engaged to volupt uary 2. Introduction As software brasss becomes more complex developers use new technologies to help manage development. The development of large and complex software applications is a challenging task. Apart from the enormous complexity of the softwares desired working(a)ity, software engineers are also faced with many new(prenominal) acquirement that are specific to the software development lifestyle. unavoidablenesss such as risibility, robustness, performance, believability, etc. Re bringments about the design and the implementation of the software itself, rather than about its functionality. N forevertheless, these non-functional requirements assholenot be neglected because they contribute to the boilersuit software quality, which is eventually perceived by the users of the software application. For object lesson, a better believability will ensure that future maintenance tasks to the implementation can be carried out relatively easily and consequently also with fewer er rors.Building software applications that adhere to all these functional and non-functional requirements is an ever more complex activity that requires assign curriculumming languages and development paradigms to adequately address all these requirements end-to-end the entire software development lifestyle. To cope with this ever-growing complexity of software development, computer science has experienced a continuous evolution of development paradigms and programming languages. In the early days, software was directly implemented in machine-level assembly languages, leading to highly omelet implementations for even simple software applications.The introduction of the procedural and functional programming paradigms provided software engineers with abstraction mechanisms to improve the design and implementation structure of the software and reduce its overall complexity. An essential particle of these paradigms is the ability to structure the software in separate but cooperating m odules (e. G. Procedures, functions, etc. ). The endeavor is that each of these modules represents or implements a thoroughly-identify subpart of the software, which renders the individual modules better reusable and evolvable.Modern software development oftentimes takes send out in the object-oriented programming paradigm that allows to further enhance the softwares design and implementation structure through appropriate object-oriented modeling techniques and language features such as inheritance, delegation, encapsulation and polymorphism. flavour-oriented programming languages and the entire aspect-orientation paradigm are a close step in this ever continuing evolution of programming languages and development paradigms to enhance software development and hence, improve overall software quality 3. 0Fundamental ideas underlying aspects and aspect-oriented software development The notion behind aspects is to incubate with the issue of tangling and scattering. According to Ia n Somerville (2009), tangling occurs when a module in a musical arrangement includes code that implements different corpse requirements and scattering occurs when implementation of a single concern (logical requirement or roundabout of requirements) is scattered crosswise several components in a program. 3. 1 What an Aspect is. Aspect is an abstraction which implements a concern. Aspects are whole specification of where it should be executed.Unlike other abstractions like methods, you cannot tell by examining methods where it will be call uped from because there is egest interval between the definition and of the abstraction and its use. With Aspects, includes a statement that defines where the aspect will be twine into the program. This statement is known as a jot. Below is an example of a pinpoint (Ian Somerville, 2006) before call (public void modify* (.. )) This implies that before the execution of many method whose starts with update, followed by any other eon of cha racters, the code in the aspect after the induct definition should be executed.The wildcat (*) matches any take in characters that are allowed in the identifiers. The code to be executed is known as the advice and is implementation of the cross-cutting concern. In an example below of an aspect authentication (lets say for every change of attributes in a payroll system requires authentication), the advice gets a password from person requesting the change and checks that it matches the password of currently logged -in user. If not user is logged out and update does not proceed. Aspect authentication before call (public void update* (.. // this is a pinpoint // this is the advice that should be executed when woven into // the executing system into tries = O string swearword = Password. Get ( tries ) while (tries smash defines specific program events with which advice should be associated (I. E. , woven into a program at appropriate cooperate points) Events may be method calls/ re turns, accessing data, exceptions, etc. Weaving incorporation of advice code into the program (via source code pre kneading, link-time weaving, or execution time weaving) 4. 0 Why Separation of Concerns a good guiding principle for software product Development Separation of concerns is a key principle of software design and implementation. Concerns reflect the system requirements and the priorities of the system stakeholders.Some examples of concerns are performance, security, specific categorised in several types. Functional concerns, quality of attend concerns, Policy concerns, frame concerns and Organizational concerns. Functional partaked to specific functionality to be included in a system. Quality of service relate to the nonfunctional behavior of a system (e. G. , performance, reliability, availability). System related to attributes of the system as a whole (e. G. , maintainability, configurability). Organizational related to organizational goals and priorities (e. G. , staying within budget, using existing software assets).In other areas concerns has been categorized according to different areas of interest or properties I. E. High level implies security and quality of service, Caching and buffering are pitiable level while Functional includes features, business rules and Non Functional (systematic) implies synchronization, transaction management. By reflecting the separation of concerns in a program, there is clear traceability from requirements to implementation. The principle of separation of concerns states that software should be organized so that each program element does one thing and one thing only.In this case it mover each aerogram element should therefore be understandable without reference to other elements. Program abstractions (subroutines, procedures, objects, etc) support the separation of concerns. Core concerns relate to a systems primary purpose and are normally localized within separate procedures, objects, etc. And other co ncerns tend to scatter and cross multiple elements. These cross-cutting concerns are managed by aspect since they cannot be localized resulting in problems when changes are required due to tangling and scattering.Separation of concerns provides modular dependency between aspects and components. For instance we would like to maintain a system that manages payroll and personnel functions in our organization, and there is a new requirement to create a log of all changes to an employees data by management. It would mean that changes will include in payroll, number of deduction, raises, employees ain data and sass of many other information associated with employee. This implies that there are several codes that will require changes.This process could be tedious and you might end up forgetting changing other codes as well even not understanding each and every code. With aspects you old deal with a particular element only. In this case there wont be redundancy of multiple codes doing the same thing. An update function could be implemented that would be called whenever you would want to implement a particular method. 5. 0 Aspect-oriented Approach 5. 1 Requirement Engineering In requirements engineering there is need to identify requirements for the nerve system and the requirements for the system extensions.Viewpoints are a way to separate the concerns of different stakeholders that are core and secondary concerns. Each viewpoint represents the requirements of related groups of stakeholder. The requirements are organized according to stakeholder viewpoint then they are analyses to discover related requirements that appear in all or most viewpoints. These represent the core functionality of the system. There could be other viewpoint requirements that are specific to that viewpoint these then can be implemented as extensions to the core functionality.These requirements (secondary functional requirements) often reflect the needs of that viewpoint and may not share ther e are non-functional requirements that are cross-cutting concerns. These furnish requirements of to virtually or all viewpoint for instance requirements for security, performance and cost. 5. 2 software Design Aspect Oriented Design is the process of designing a system that makes use of aspects to implement the cross-cutting concerns and extensions that are identified during the requirements engineering process.ADD focuses on the explicit representation of cross-cutting concerns using adequate design languages. ADD languages consist of about way to specify aspects, how aspects are to be composed and a set of well-defined composition semantics to give away the details of how aspects are to be integrated. (Chitchat, Awls Rashes, Pete Sawyer, Alexandra Garcia, Monica Pinto Larson, Jotter Beaker, Bedim Ticonderoga, Skibobs Clarke, Andrew Jackson, 2005) Like in object orientation, several aspect-oriented extensions to ML design language to represent aspect-oriented concepts at the d esign level.One of these ML extensions is ATOM. ADD in ML requires a means of modeling aspects using ML stereotypes. Is an approach of specifying the conglutination points where the aspect advice is to be composed with the core system. The upper-level statement of requirements provides a basis for identifying some system extensions that may be implemented as aspects. maturation these in more details to identify further extensions and understanding the functionality required is to identify a set of use cases associated with each viewpoint. Each use case represents an aspect.Extension use cases naturally fit the core and extensions architectural model of system. Jacobsen and Eng (2004)) 5. 2. 1 Aspect-oriented Design Process Below is fugue 1 that illustrate the design activities of generic wine aspect-oriented design process Core system design is where you design the system architecture to support the core functionality of the system. Aspect identification and design Starting with the extensions identified in the system requirements, you should analyses these to see if they are aspects in themselves or if they should be broken down into several aspects.Composition design At this stage, you analyses the core system and aspect designs to discover where the aspects should be composed with the core system. Essentially, you are identifying the Joint points in a program at which aspects will be woven Conflict analysis and resolution Conflicts occur when there is a pinpoint clash with different aspects specifying that they should be composed at the same point in the aerogram abduce design is the essential to avoid the problem of accidental pinpoints.These occur when, at some program Join point, the name accidentally matches that in a pinpoint pattern. The advice is therefore unintentionally applied at that point. 5. 3 Programming The goal of aspect-oriented programming is to provide an advance modularization scheme to separate the core functionality of software sy stem from system-wide concerns that cut across the implementation of this core functionality. (Kim Mess and Tom Tour, 2007) APP must address twain what the programmer can say and owe the computer system will realize the program in a program system.APP system mechanisms are conceptually straight forward and have efficient implementations. 5. 3. 1 Joint Point Model A Join point model defines the kinds of Join points available and how they are accessed and used. They are specific to each aspect-oriented programming language for instance Aspects. In Aspects, Joint point are defined by grouping them into pinpoints. 5. 3. 2 Pinpoint A pinpoint is a predicate that matches Join points. A pinpoint is a relationship Join point Boolean, where the domain of the relationship is all mathematical Join points. 3. 3 Advice 5. 4 Advantages and Disadvantages of APP APP promotes clear design and risibility by enforcing the principles of abstraction and separation of concerns. APP explicitly promotes separation of concerns, unlike earlier development paradigms. This separation of concerns provides cleaner assignment of responsibilities, higher modularization and easier system evolution, and should thus lead to software systems which are easier to maintain. The process is to collect scattered concerns into compact structure units, namely the aspects.On the other hand, APP cannot be elegantly applied to every possible situation. . 0 Validation and verification Validation and Verification is the process of demonstrating that a program meets the real needs of its stakeholders and meets its specification. Validation or interrogatory is used to discover defects in the program or to demonstrate that the program meets its requirements. Statement verification techniques focus on manual or automated analysis of the source code. Like any other systems, aspects-oriented systems can be tested as black-boxes using the specification to derive the tests.However, program source code is problema tic. Aspects also introduce additional interrogation (Ian Somerville (2006)) 6. 1 Testing problems with aspects To inspect a program in a conventional language effectively, you should be able to read it from right to left and top to bottom. Aspects make this as the program is a tissue rather than a sequential document. One cant tell from the source code where an aspect will be woven and executed. Flattening an aspect-oriented program for reading is practically impossible 6. Challenges with Aspect-oriented Systems One of the limitations of APP is that it is not supported by indifference on any programming platform. Although it seems to be gaining popularity, its implementation has been undertaken by third parties as extensions to development framework. This has resulted in some level of disparity on the features being implemented as some of the implementations only implement specific features making it difficult to use such frameworks in some situations in addition to creating som e confusion over the feature.AAA programs can be black-box tested using requirements to design the tests, but program inspections and white-box testing can be problematic, since you cant always tell from the source code alone where an aspect will be woven and executed. 7. 0 Recommendations Adopting Aspect Oriented Software development will reduce repetitions of coding or Component maintenance and reuse has a great impact to the company. On the part of cost, the company can determine whether it is easy to maintain its systems or not.Using other development paradigm can be unenviable hence increasing tangling and scattering. System performance will also be affected in such a way that there could be more codes doing the same thing. GOAD concepts reduce redundancy and make up system performance. All functional and non-functional concerns are dealt with in GOAD. On implementation of security, Design flaws and code errors or bugs old be some of the causes of security flaws in software. Unlike SOD, GOAD approach made Software Development easy with the separation of concerns leading to modularization in reuse.

Boys Don’t Cry Analysis Essay

Boys Dont proclaim Analysis Brandon was deffinately a very confused person, but yet seemed to have everything under control just close of the time. This is the only reason that she was ever eve able to trick everyone into thinking she was a he. Brandon was able to accommodate most of the male social norms to her every day life, for example Drinking and driving, incomplete of the women were asked to drive later on they had been drinking, it was the least drunk male that drove them all, and that illegal social norm is usually attributed to males only. Brandon committed more deviant acts finished out the movie, near illegal, and others just kind of weird. An illegal deviant act was her theft cars, a non illegal deviant act was her trying to drink homogeneous a real man, when in that respect was no doubt in her mind that she would be able to. Because deviance refers to socially disapproved behavior, which is fundamentally what Brandon did through out the movie.The normative view of sexuality is one of scorn and hatred Tom and Jon had normative views of sexuality. They did non understand it, therefore they did not like it, and its as easy as that. While on the other hand the reactivate view of sexuality has a much more broad and assailable mine about the subject. Lana was a reactivate when it came to sexuality, she understood what Brandon was feeling for her, and no matter what the consequences were, and she would eff with them. The normative view of sexuality is definitely the perspective that best applies to sexual personal identity. That is really kind of what sexual identity is any way, how you as a human want to look, feel, and act.The medicalization of deviance in this movie ran ramped almost everyone had some sort of problem that could be considered an illness. With Tom, Jon, Lena, and her mom, it was drugs and alcohol. For Brandon, it was her sexual identity problem, she just did not comprehend that she was a female, and has to live with it. Medicalization of deviance, and conflict theory go hand in hand, because all medical model does is create conflict, salutary? It is just like our justice system out there, the number of poor people getting arrested in the United States out numbers the more wealthy and respected by three times. Should that be copulation us something about how we are running this country. That is the same reason for all of the characters in themovie they drink, swear, steal, and lie, essentially because that is the way that they like to live in the lower classes of society.I would have to say that what Brandon has is not a result of bad parenting, but rather a medical deviance problem. I am indisputable that Brandons upbringings were not great by any means, but it did not turn Brandon into what she had become. So basically what I believe is that, yes parents do need to show their children both rewards and punishment, but in moderation, but neither of those will help that much when it is as bad as Brandons case There were many another(prenominal) examples of Brandon conforming to male roles through out the movie some were get ined off better than others. One that she did draw up off quite well was her ability to sexually please a woman with out her knowing that Brandon actually had no penis.Another male role she played well was her ability to slip atomic messages in to conversations or situations that would back up her manliness. Like getting in a fight at the bar, or waiting at the door until the girl had gotten in to make sure she was ok, or the tincture of Brandon having a baby of her own, but while still keeping the masculinity in the subject. One of the hardest challenges that Brandon go about was riding the truck she took a tremendous beating for a woman and shook it off like a man would do. When you know she hurt much worse than she showed, because that would not be very anthropoid to show your pain.So in conclusion I would have to say that any woman that could pull off being a man for that long with out even her closest friends knowing about it for that long of a time period is a very strong willed person, and maybe deserves to live as a man, or what ever she wishes to be.

Fall of Troy Essay

self-esteem and self boldness are values often times convey in stories and books that chronicle tales or so classic Mythology. With the Gods and goddesses favoring a certain person and taking sides, mortals oftentimes grew more(prenominal) complacent and over overconfident ab tabu their own selves. As the Greek word Hubris implies it is an exagger consumed act and showing of self confidence that many times it leads to downfall of actions taken. Decisions are blind and corrupted by the display of over confidence, thus details of courses are taken for granted. The events that transpired in Homers Iliad exemplify a person and a group of persons act of hubris. The Iliad is divided into different sections. It is composed of twenty four different books, which narrate Achilles invoice and The Trojan War. Each story depicts how hubris plays an important role that leads to the result of the war and the downfall of a powerful city. It also narrates how disputes are born through hubris . The Trojan War was believed to be the greatest participation in Greek History. The origin of the war was believed to shake up started, long before Achilles was born. It roots its origin in the conflict with the golden apple that happens among the three to the highest degree powerful goddesses, Athena, Aphrodite and Hera. The event leads to Paris, a Trojan Prince running off with Helen, married woman of Menelaus. record I of Iliad, The Quarrel by the Ships verse 10 showcases a display of Agamemnon, world-beater of Mycenae and companion of Menelaus, exceeding self confidence. Old man, dont let me catch you by our kettle of fish ships, sneaking back here today or later on. Who cares about Apollos scarf and ply? Ill not release the girl to you, no, not before shes grown old with me in Argos, far from home,working the loom, sharing my bed. Go away.If you want to get home safely, dont contain red me. (Homer The Quarrel by the Ships bulk 1 of the Iliad). Agamemnons pride and b oastful antics were very evident that he even defies Apollos power. He has this belief that, since he is a very righteous ruler, he be all the great things as rewards.Also, we can see Agamemnons proud image on the kindred book verse 110 to 120 Prophet of evil,when contract you ever said good things to me? You go to bed to predict the worst, always the worst You never show good news.Now, in prophecy to the Danaans,you say bowman Apollo brings us pain because I was unwilling to accept fine ransom for Chryses daughter, Chryseis. solely I have a great desire to take her home in fact want her more than Clytaemnestra,the wife I married Chryseis is precisely as good in her shape, physique, intelligence, or work. Still, Im inclined(p) to give her back, if thats best. I want the people safe, not all vote downed off. hardly then youll owe me another prize. I wont be the only Argive leftwithout a gift.That would be entirely unfair to me. You all can see my spoils are going elsewhere. (Homer The Quarrel by the Ships maintain 1 of the Iliad). He refused to set free the priests daughter and would only do so if a replacement would take her place. Agamemnon believed that what the oracle had foreseen is wrong and his decision could only be moved if the narrow he had set is satisfied. What he wants, he should get. It also shows that Agamemnon did not want others to make fun of him if he would loose his concubine without a replacement. To avoid the looming war a truce was agreed upon that Paris and Menelaus should skirmish and whoever won would have Helen as his wife. Paris lost but could not accept his defeat. His words to Helen from adjudge III Paris, Menelaus and Helen verse 440 were some kind of excuse for his failure. Wife, dont mock my courage with your insults. Yes, Menelaus has hardly defeated me, but with Athenas help.Next time Ill beat him for we have gods on our side, too.(Homer Paris, Menelaus, and Helen countersign 3 of the Iliad) He could have easil y accepted the defeat and handed out Helen to Menelaus. But, he too was too proud to accept the defeat. Menelaus has clearly won their jibe but he could not bear loosing Helen, especially because of his own fault. Paris could have died right away if not for Aphrodite lending him the oftentimes needed help. Paris Hubris was in display. The war then has become inevitable as Aphrodite persuaded Pandarus in shift the Trojans oath. Fiery hearted son of Lycaon, why not do as I suggest? Prepare yourself to hold a swift arrow at Menelaus. Youd earn thanks and glory from all Trojans, most of all from Prince Alexander.Hed be the every first to bring fine gifts, if he could see warlike Menelaus, son of Atreus, mounted on his bier, his bitter funeral pyre, kil lead by your arrow. (Homer The Armies Clash hold back Four of the Iliad). Pandarus shoots Menelaus. His dogmatic attitude and greed for fame and appreciation broke the treaty. Believing that he would gain glory by cleansing Menelau s, he fired his arrow. Pandarus was hungry for the honor he would get if eventually he can kill Menelaus. It would be of great pride of him to be recognized in that way. The war has erupted, and many Trojan and Achaeans have died. Diomemedes, guided by Athena, have been pushing the Trojan Army back with his superb combat skill. But as he pushes forward he was hit by Lycaons son. Come on, you brave horse-lashing Trojans, for the finest of Achaeans has been hurt.I dont envisage hell long survive my arrows force. (Homer Diomedes Goes to Battle Book V of the Iliad). Lycaons son was bragging and shouting that he has killed Diomedes. For him, the best warrior has been killed so it would all be easy to take on the remaining enemy. He thinks of himself so highly and mighty.Little that he knows that Diomedes was alive(p) and his boastful act only infuriates the fomenting spirit of Diomedes. He was furious and attacked the Trojans more violently. So umbrageous was Diomedes that he even t ried killing Aphrodite. Diomedes with his ruthless bronze had gone to run down Aphrodite, intentional she was not a god who could do much in battle not one of those who lead mens wars.She was no Athena,no goddess Strife, who destroys whole cities. (Homer Diomedes Goes to Battle Book V of the Iliad).It was a display of hubris, as a mortal man attacked a goddess. Mortal men should respect Gods and recognized the ample difference between their abilities. Diomedes is powerful but he should know the limit of being human as Apollo stated from Book five verse 440 Take care son of Tydeus. Go back. Dont think youre tint to the gods. The race of men whowalk upon the ground can never match the race of deathless gods. (Homer Diomedes Goes to Battle Book V of the Iliad).The Gods pride was injure, and Diomedes actions angered the Gods and resulted to more gore.From verse 330 of book six, it would be obvious that Hector was feeling low. Paris, youre a worthless man. Its quite wrong of you to nurse that anger in your heart, while men are being destroyed, advertiseing around the city its steep walls. Its because of you the sounds of warfare catch fire around our cityyou would fightany man you saw avoiding battle fleeing wars brutality. (Homer Hector and Andromache Book 6 of the Iliad). This direction from Hector, commander in chief of Troy, shows how he has been hurt by the actions done by Paris. For him, branding his brother is a great insult.He knew he was fated to die in that war. Still, he chooses to fight for his people. to the full aware that it was his brother actions that shape the war, nevertheless, he together with their allies was duty bound in argue Troy. The Trojans are too proud especially Hector, the heir to the throne, to admit that Paris was wrong. They were too high and nobleman to believe that a fellow Trojan would commit such misconduct.Hubris is again in display that blinded their actions. They could have easily handed out Helen when the Greeks asked for Helens return. Hectors disappointment with Paris is again revealed to the following statement Brother, no one could justly criticize your work in battle, for you fight bravely. But you deliberately hold back and do not wish to fight.It pains my heart, when I hear fateful things about you from Trojans, who are suffering much distress because of you.(Homer Hector and Andromache Book 6 of the Iliad). He just could not stand what his fellow Trojans would tell about his brother. Achilles on the other hand resolved to draw off from fighting. His retirement from battle also showed sign of hubris. In a display of his exaggerated pride, which was divine revelation in verse 70 of Book 16, Achilles would not return to battle even if his comrades are easy being killed and wounded. Dreadful pain came in my heart and spirit when that man wished to cheat someone his equal and steal away that prize,and just because hes got more power. That really hurt, given that Ive sufferedin this w ar so many pains here in my chest. Achaeas sons chose that girl as my prize. I won her with my spear, once Id destroyed her strong-walled city.Lord Agamemnon took her back, out of my hands, as if were some singular without honor. (Homer Patroclus Fights and DiesBook 16 of the Iliad). His lost of drive for fighting happens when Agamemnon took Achilles concubine in replaced of the priests daughter who was set free. Achilles pride was hurt so he left the line of battle. He was one of the Greeks mighty warriors and he believed that even Agamemnon should recognize that.Although, Agamemnon promised gold and the return of his concubine, to bring Achilles back to the lines of battle, Achilles injured pride was not persuaded. Instead he allowed his companion Patroclus to use his armor and fight in his place. He was proud enough not to work under the command of Agamemnon, who he believed is not a worthy commander in chief. His pride would not allow him to join the fighting, and his hubris ha d caused him the life of his friend. Achilles returns to actions, from verse 20 of Book 19, was filled with power Mother, this armor the god has given me is a work fit for the immortals, something no animate human could create (Homer Achilles and Agamemnon Book 19 of the Iliad). Upon hearing this Achilles was filled with fearless power. With Thetis by his side, he led his army. The overwhelming confidence brought by the armor and the rage he was feeling, was proof of his anxiousness to return fighting.though youre e a brave man, godlike Achilles, dont encourage Achaeas sons to fight against the Trojan on empty stomachs. If so, the fight wont last for long if troops hire right now, once some god in fuses strength in to both sides.No. memorize Achaeans to have some food and wine by their swift ships for they give strength and courage.No pass can fight the enemy all day till sunset without some food. (Homer Achilles and Agamemnon Book 19 of the Iliad). This was a major display of hu bris of Achilless, promising he will not waiver, rest and eat until he has avenged the death of his friend.The stopping point of Patroclus forced Achilles to return to the battlefield. He was enveloped of the idea of revenge. He was so crazy that he even attacked Apollo, from verse 10 of Book 22. Son of Peleus, why are you, a holy human, running so hard in an attempt to catch me,an immortal god?Youre still ignorant it seems, of the fact that Im a god. You keep coming at me with such anger. (Homer The Death of Hector Book 22 of the Iliad). Achilles was so enraged that he was fighting fiercely even in the face of God. He blames himself for the death of his friend. He was too weak to bear the his pride.The fall of Troy was designate to happen. With the consent from the Gods, Troy was fated to fall. However, hubris played an important role to its downfall. From the moment, the Trojan War broke out it was the hubris not only by my mortals but by Gods, which made the events more chaot ic. With the Gods by taking up sides to show their power the outcome of the war and the course of history itself, was shaped and reshaped. Treaties could have been signed and bloodshed could have been avoided if not because of the over exaggerated pride and confidence every man possess.When the Trojans celebrated their unpatterned victory, it leads to their downfall. They have underestimated their foe. They taught that the Gods had ruled in their favor, when the horse was found. They also believed that the time a sea monster ate those who opposed the entry of the horse to the city was a sign from the Gods. They grew more complacent and failed to act and think rationally. They deduced that in fact they are greater warriors and men compared to the Greeks. They admired themselves too well. The admiration was overwhelming that they failed to surface up their opponents that eventually it leads to a tragic end. The belief that the City could not be conquered made a difference. Necessary precautions were not done.(Homer The Iliad)Homer. Achilles and Agamemnon Book 19 of the Iliad. 800 B. C. E.. The Armies Clash Book Four of the Iliad. 800 B. C. E.. The Death of Hector Book 22 of the Iliad. (800 B. C. E).. Diomedes Goes to Battle Book V of the Iliad. (800 B. C. E).. Hector and Andromache Book 6 of the Iliad. (800 B. C. E).. The Iliad. 800 B.C.E.. Paris, Menelaus, and Helen Book 3 of the Iliad. (800 B. C. E).. Patroclus Fights and DiesBook 16 of the Iliad. 800 B. C. E.. The Quarrel by the Ships Book 1 of the Iliad. 800 B. C. E.