Tuesday, September 17, 2019
Population in India Essay
India is an extremely large country which is sometimes referred to as a subcontinent. The enormity of the population of India has been of great apprehension and concern since the 1940s. There are many reasons for this serious dilemma in India, however, many initiatives have been implemented to resolve the crisis. In the following essay I will investigate and discuss the situation.à Firstly, a significant cause of overpopulation in India is the massive death toll. In one year in India, 5 million children die and approximately half the total deaths every year are of infants under five. This horrific reality is due to disease, malnutrition and diarrhoea. Dysentery is caused by bad diets and unfit drinking water, resulting in the loss and reduction of fluid needed in the body and consequent dehydration. A large majority of children die from acute cases of diarrhoea, despite the fact that there is an injection to cure it which costs 1p. Demise because of this relatively curable illness must cease. In addition, another widespread fatal disease is T.B. which numerous children die of. The disease occurs in the lungs and consists of the sufferer loosing blood through coughing. Moreover, a major reason for the high numbers of infant mortality in India is not simply sickness of the child, but of the pregnant mother as well. If the parent is unhealthy, it is very probable that the child they produce will also have contracted illness. The monthly increase in population is 1 million. This overwhelming figure is because large families are needed to work on farms and in other jobs. However, the Indians have more offspring than they actually want or need because they realise some may not live long and ,therefore, wonââ¬â¢t have the skills to assist and help in the fields. For example, a couple may want 6 children but have 8 for good measure and in case some die. This only resolution to this problem is to reduce the death of children so that parents can feel positive that their children will not die. Subsequently to having more children than needed, many do not die as expected, accordingly, the population increases. In the 1950s the Indian population was a mere 350 million, since then, it has increased to 750 million. The population in India is so immense that for every 1 person in UK there are 12 people in India! Furthermore, another cause of the high population is the requirement of more children as labourers in the country than in the town. There are larger families in the country, because, with more people to help an increased yield is produced, ensuring a larger income, prosperity and affluence. However, if a family has less children, labourers have to be hired which costs money and therefore a reduced surplus. 300 million people donââ¬â¢t have an education or enough to eat in India. In the countryside every man woman and child works and all the jobs are manual, because suitable and affordable implements have not yet been introduced. Because of this, boys are seen as more useful than girls because they can partake in the heavy labour. If a family does not get a boy the first time, they have more children until they get one. When a marriage happens the girl goes and lives with her in-laws which provide extra help in the fields. The more sons a family has the more successful it will be. There are also a wide variety of differences between the country and town environment. In the Indian countryside, children are a vital requirement, whereas, in towns children are not needed to do manual labour so the families are smaller. Besides this, in towns medicinal cures are available so fewer children die and parents have an improved chance of keeping themselves and their children healthy. There is a higher infant mortality in the countryside because cures are not available, although, larger families mean more money. If a family has a son they very often move to the cities and send the money they earn to their families in the country. In the city it is harder to afford so many children because food has to be purchased unlike in the countryside. There is however a much decreased infant mortality in the city as a result of accessible remedies. Ghandhigram is a charity established to help children and young mothers in the countryside. 75% of Indiaââ¬â¢s population live in the countryside, where the health service is basically nonexistent. Ghandigram has presented the solution of looking after and concentrating on the health of very young children. A dramatic improvement has been seen already and the situation of children is gradually recovering. As well as health in the countryside, the organisation is also persuading many more mothers to send their children to school. Children are being educated with the incentive of free school meals provided. As a result of this a large proportion of the future generation will be healthy and educated, consequently, good jobs will be obtainable to them. In the villages where the scheme is operating feedback is very positive and Ghandhigram will hopefully create further alterations and enhanced conditions.
Monday, September 16, 2019
Outline and evaluate Bruce and Youngââ¬â¢s theory of face recognition Essay
The face recognition model developed by Bruce and Young has eight key parts and it suggests how we process familiar and unfamiliar faces, including facial expressions. The diagram below shows how these parts are interconnected. Structural encoding is where facial features and expressions are encoded. This information is translated at the same time, down two different pathways, to various units. One being expression analysis, where the emotional state of the person is shown by facial features. By using facial speech analysis we can process auditory information. This was shown by McGurk (1976) who created two video clips, one with lip movements indicating ââ¬ËBaââ¬â¢ and other indicating ââ¬ËFaââ¬â¢. Both clips had the sound ââ¬ËBaââ¬â¢ played over the clip. However, participants heard two different sounds, one heard ââ¬ËFaââ¬â¢ the other ââ¬ËBaââ¬â¢. This suggests that visual and auditory information work as one. Other units include Face Recognition Units (FRUs) and Person Identity Nodes (PINs) where our previous knowledge of faces is stored. The cognitive system contains all additional information, for example it takes into account your surroundings, and who you are likely to see there. fMRI scans done by Kanwisher et al. (1997) showed that the fusiform gyrus in the brain was more active in face recognition than object recognition, this suggests and supports the idea that face recognition involves a separate processing mechanism. This model suggests that we process familiar and unfamiliar faces differently. That we process familiar faces using; structural encoding, FRUs, PINs and Name Generation. However, we use structural encoding, expression analysis, facial speech analysis and direct visual processing to process unfamiliar faces. However, there is evidence by Young et al. suggesting that the idea of double association is poor. He studied 34 brain damaged men, finding there was only weak evidence for any difference between recognising familiar and unfamiliar faces. An issue with this study and the model itself, is the use of brain damaged patients to prove it works. This is because there is only a small sample size so it is hard to generalise to the wider population. It is also unclear if it is the brain injury itself that causes the result and if it is the same for healthy people. There was a study done by Young, Hay, and Ellis (1985) that uses people with no medical issues. They asked people to keep a diary record of problems they experienced in face recognition. They found people never reported putting a name to a face while knowing nothing else about that person. This supports the model as it suggests that we cannot think of a personââ¬â¢s name unless we know other contextual information about them. Prosopagnosia is a condition where a person cannot recognise familiar faces, but only the features, not the whole face. The condition contradicts the model as it suggests that the process are most likely not separate. As most patients had severe problems with facial expression as well as facial identity, this suggests they are processed separately. The model can also be seen as reductionist, as it only gives a vague description of what the cognitive system does. However, there is research that does support the concept that there are two are separate paths for processing face recognition and facial expression. One being Humphreys, Avidan, and Behrmann (2007) who studied three participants with developmental prosopagnosia. All three had poor ability to recognise faces, but their ability to recognise facial expressions was similar to that of healthy individuals. A study that suggests that units of face recognition are separate is Bruyer et al. (1983). Who investigated a patient unable to recognise familiar faces, but who could understand their facial expressions, which implies that facial expression analysis and name generation is separately processed. This supports Bruce and Youngââ¬â¢s idea of separate units. Further support for the idea of separate components of face recognition was shown by Campbell et al. (1986). They found a prosopagnosic who could not recognise familiar faces or identify their facial expressions, however they could perform speech analysis. This study suggested that facial speech analysis is a separate unit of face recognition.
Sunday, September 15, 2019
Construct the Efficient Frontier
Construction a. Estimation The goal is to obtain the raw ingredients ââ¬â expected returns, standard deviations and correlations. Historical data are used for this purpose. As a rule of thumb, five years of daily data are probably right (one year should be the absolute minimum). Keep in mind the following: 1) make sure to use the adjusted close prices to calculate returns (so that you wonââ¬â¢t have large, spurious negative returns due to dividend payments or splits), and 2) calculate log returns (so that you can aggregate daily returns to obtain holding period returns, if ever needed).In Excel, the function for mean and standard deviation are ââ¬Å"= average (range)â⬠and ââ¬Å"stdev(range). â⬠To calculate the correlation matrix, use ââ¬Å"correlationâ⬠under ââ¬Å"data analysis. â⬠Please note, in practice, the estimates can be adjusted in view of economic outlooks. This is especially so for expected returns. Sometimes, the realized historical return s are negative or below the risk-free rate. They must be adjusted upward ââ¬â who would ever buy a stock and expect to receive a return less than the risk-free rate (if the beta is not negative)!? II.Efficient frontier construction Step 1. Variance/covariance matrix, The expected return and variance for the portfolio are: You can think of the variance as the ââ¬Å"weighted averageâ⬠of all the covariances, ? i? j? ij where the weights are xi and xj. Of course, the variance terms are special cases of the covariances when i=j, and ? ij=1. You can calculate the portfolio variance in the spreadsheet in many different ways. The way I do it is to first calculate the variance/covariance matrix, whose entries are ? i? j? ij and ? i2. To this end, we first construct the tandard deviation (std) matrix and the correlation matrix, as shown in the spreadsheet. Then, first multiple the std matrix to the correlation matrix to obtain (multiply the range of b3.. g8 to the range of b10.. g15). Then, multiple matrix to the std matrix again (multiply the range of b17.. g22 to the range of b3.. g8) to obtain the variance/covariance matrix in b24.. g29. Step 2. Portfolio's return, variance, standard deviation and slope To obtain the portfolio variance, we need to further multiply each entry of the variance/covariance matrix by their corresponding weights, xi and xj.Remember, those n portfolio weights are what we are trying to solve for. So we put them in a column (a34.. a39). To facilitate the calculations, I also place the weights at the top of the matrix. The variance/covariance matrix is simply copied from Step 1. Since we will also need the security returns to calculate the portfolio return, they are placed in j33.. j39. Now, we multiply the weights to each column of the variance/covariance matrix using the function ââ¬Å"=sumproduct. â⬠This ââ¬Å"sumproductâ⬠results in each weight in (a34.. 39) being multiplied to each entry in the variance/covarian ce column, and then all summed up. The variance/covariance terms will have only one weight being multiplied to. So we need to multiply this sum by another weight at the top of the matrix (remember: multiplying the sum by something is equivalent to multiplying each individual item by the same thing). Summing all the items in b40.. g40, we obtain the portfolioââ¬â¢s variance, and taking square root of it, we have its standard deviation, in cell b45. The portfolioââ¬â¢s return in b44 is calculated as the weighted average of individual security returns.The slope of the CML is simply the rise (i. e. , portfolioââ¬â¢s return minus the risk-free rate) over run (i. e. , the portfolioââ¬â¢s std). Step 3. Obtain minimum variance portfolio: minimize STD subject to sum of weight = 1. 0 The minimum variance portfolio is the one that has the lowest variance among all possible portfolios. We use the ââ¬Å"Solverâ⬠in Excel to find this portfolio. We would like to vary the weights in a34.. a39 so that the variance (or equivalently, std in cell b45) is minimized. In the ââ¬Å"Solver,â⬠enter b45 as the target, and choose ââ¬Å"min. The range for ââ¬Å"Changing cellsâ⬠should be a34.. a39. The only constraint is: all the weights sum to one, i. e. , set cell b42 equal to 1. 0. Then simply click on ââ¬Å"solve. â⬠The solutions will be in a34.. a39. Of course, the portfolioââ¬â¢s return and std are simultaneously calculated in cells b44 and b45, and the slope linking the portfolio and the T-bill is in cell b46. Step 4. Obtain market portfolio: maximize Slope subject to sum of weight = 1. 0 Follow the same logic/procedure as in Step 3, except that you want to maximize cell b46. Step 5.Obtain market portfolio with no short selling: maximize Slope subject to sum of weights = 1. 0 and all weight being positive This part is just for completeness: to show you how to construct the market portfolio when short selling is prohibited. Here you also ma ximize cell b46, except that, aside from the weights-summing-to-one constraint, you would add six more constraints: a34 ;gt; 0, a35 ;gt; 0, â⬠¦, a39 ;gt; 0. It turns out that, the weights on Securities 2 and 3 are zero, since they command the most amount of short selling in the unconstrained case (Step 4).However, it is not always true that any security that is being shorted in the unconstrained case will have a weight of zero in the constrained case. Security 5 is a case in point. Step 6. Generating efficient frontier Here, everything is already self-explanatory. Essentially, we need to plot the parabola and the CML. To this end, we first get the functions for each, and then use Excel to generate some points (50 in my example) within the reasonable range of returns and std.
Saturday, September 14, 2019
What You Pawn I Will Redeem
The first part of this assignment asks us to list three pieces of fiction that you have read. This question is not easy for me being that I havenââ¬â¢t read many books in my lifetime. The only book I have read is the Holy Bible. I have read several books to my children such as The Three Little Pigs, and Little Red Robin and other children nursery rhymes short stories. What I liked about reading the stories to my children was watching and listening to them asks questions about the story and seeing their expression when the big bad wolf tried to blow their houses down. What I like about the Bible is it is full of quotes and stories that give me encouragement when I am going through. I read my Bible when things are not going right in my life and I can find comfort in the scriptures. The books of Psalms are considered songs that can comfort you, and convict you. When I read my bible I feel a connection with God, and this is a wonderful experience. The Bible teaches me how I am to treat my neighbors. It teaches me that if I donââ¬â¢t work then I canââ¬â¢t. It prepares me for Jesus return and if I want to make heaven my eternal home then I have to follow the guidelines that are in the 66 books of the bible. Literature to me is reading different ways that writers put words together and make it into a story, a poem and other reading material. Literature is a source of expression of oneââ¬â¢s thoughts that is put onto paper for others to read and gain insight on other peopleââ¬â¢s thoughts. Literature comes in different forms such as books, and magazines. There are other ways literature can be enjoyed by everybody even if you have a disability such as a blind person can use Braille and listen to a book in audio format. My thoughts on why I think literature is valuable or a waste of time is I have mixed feeling about this. I believe literature is valuable because it helps us to understand the thoughts of others. Literature is valuable in this day and age because if you cannot read or write you will have a hard time finding ways to support yourself and your family. To me it is a waste when your career choice is Medical Coding and Billing, and they give you a literature course that has nothing to do with what you are paying good money to learn your career chose. Part B What are the main points of this piece? They are talking about a homeless man that is dealing with his biological family and the people who live on he street with him that he calls family too. He deals with his being a Native American Indian and being stereotype by others. Even though we as a people stereotype others by how they look, where they live or because they donââ¬â¢t look or do the same as you do, the author wants the people to know all people can be redeemed no matter how low they get in life. What are the images the author co njures for the reader? Some of the images I seen were after fifty years of not knowing who stole their grandmothers regalia and it suddenly appears as Jackson and his friends are on the streets panhandling. Another image was the yellow bead that was sewn somewhere into the regalia. This was a tribal tradition to hide it in the regalia so it wouldnââ¬â¢t be easy to find. What does the grandmother regalia symbolize? The regalia was worn when they participated in the powwow dance, which was a traditional ceremony performed by the Native American Indians. It is a decorative cloth with feathers and beads which are sewn in. It reflects an individualââ¬â¢s life and their circumstances. How does the author use the element of surprise? What You Pawn I Will Redeem English 102 MWF 11-11:50 I really enjoyed the story What You Pawn I will Redeem. It was very well written and kept my attention throughout the story. It is amazing that he walked by a pawnshop and immediately recognized his grandmotherââ¬â¢s regalia without ever seeing it other than in pictures. I enjoy reading about Native American cultures and beliefs. There was a lot of humor in this story and Jackson definitely did not take himself too seriously. I think the 1st person narrator was very important in telling this story.I do not feel that Jackson was an unreliable narrator because he seemed to tell it like it is. He had no reason to try to make himself look better. He seems to accept himself for who he is. He is an honest man who seems to be well liked by everybody he deals with on a regular basis, from the cop to the guy with the newspapers. He shows his struggles with alcohol and also his giving nature. All the money he came across he spent not just on himself getting drunk bu t on others as well.I believe that the theme of the story is that no matter where you go in your life you never forget or really give up where you come from. Jackson Jackson has been homeless for six years away from his family in Spokane yet as soon as he saw his grandmotherââ¬â¢s regalia in the window he knew it was hers even before they find the yellow bead. It then becomes his mission to gather the money to get it back. The regalia is a piece of him and the life he left behind. Even though he does not come up with the money to buy it back he still ends up with it in the end.
Friday, September 13, 2019
Review article Example | Topics and Well Written Essays - 250 words - 20
Review - Article Example The control phenomenon is attributed to a gating system of cell division within the eukaryotic organisms. Consequently, the purpose of the research was to ascertain whether prokaryotes would also manifest circadian control in the period of cell division timing. In order to achieve this, the authors measured cultures of DNA content, cell division rate, gene expression and cell size. This measurements were carried out on the prokaryotic cyanobacterium Synnechococcus PCC 7942. The results indicated that populations were rapidly dividing at 10h periods of circadian gating of cell division. The experiment proved Synechococuss cells, with extensive circadian rhythms of gene expression and cell division, exhibited double growth rate that were significantly greater than once per 24h. Another new an important finding by the research article showed that Synechococcus cells had the ability to simultaneously sustain double circuits timings that exhibited different timing periods. Mori, Tetsuya, Brian Binder, and Carl H. Johnson. "Circadian Gating of Cell Division in Cyanobacteria Growing with Average Doubling Times of Less Than 24 hours."à Proceedings of the National Academy of Sciences of the United States of Americaà 93 (1996): 10183-10188.
Thursday, September 12, 2019
Letter to New Hires Essay Example | Topics and Well Written Essays - 500 words
Letter to New Hires - Essay Example Our principles require that we work to create a healthy, viable Earth, in addition to a healthy, viable business, and in order to do so then we must risk change. Where once forests were abundant and lumber taken from them without regulation, our environment has changed and forestry work has demanded change, also. We take great pride in the fact that all three forests owned by Collins-Pennsylvania, Almanor, and Lakeview-have been independently certified by Scientific Certification Systems (SCS) in accordance with the principles and standards of the Forest Stewardship Council (FSC). Preserving our environment in order that our children and grandchildren may enjoy the natural beauty of our forests is the foundation of the Collins Company. The 295,000 acres of timberlands owned by the company are biodiverse, multi-layered, canopied forests. Each forest is self-sustaining and includes more wood today than it did over a century ago. They contain habitats of bald eagles, black bears, wild turkeys, rubber boas, beavers, great blue heron rookeries and the endangered Goose Lake redband trout. They are enhanced by meadows, and various water features including springs, creeks, rivers, and lakes. These forest are naturally healthy with trees grown only from a combination of sunshine, water, and nutrients from fertile soil.
Wednesday, September 11, 2019
Acid mine drainage Essay Example | Topics and Well Written Essays - 1000 words
Acid mine drainage - Essay Example Authorities reported about the river passing by the spoil becoming orange. A comparison between the analysed levels of the pH of the site to determine the source of contamination based on the Acid generating Potential and the Acid Neutralizing Capacity (ANC) which is calculated directly by adding acid to a slurry of the spoil until the pH falls below some specified value (often pH 4.5) is expressed directly as meq (of acid added) per kg (of sample used). This analysis will help to pin point the source of acid mine, whether it is coming from the spoil heap or mine adit. This information can be used to devise remediation measures in order to reduce the damage on the environment-river pollution. Knowledge of acid mine drainage is not only significant to authorities tasked with environmental protection but also to consultancy agencies in acid mine drainage. Lastly, mining companies need to reduce the damage to the environment by employing technologies for proper treatment of their discha rges. Wetlands engineering can reduce the damages of acid mine aquatic plants and animals. It is theorized that building wetlands can mitigate AMD pollution and have lower or no future operations and maintenance costs.Acid mine drainage can be defined as both ground and surface waters of pH is âⰠ¤ 4.5. The Acid mine drainage is mainly caused by the oxidation reaction of surface waters with pyrite containing rocks or ores. Sulphate is found almost everywhere on this earth even in natural fresh waters (Drever, 1997). It is usually the second or third most abundant anion in rainwater, where it is derived both from natural aquatic sources and from atmospheric pollution - the sulphur component of ââ¬Å"acid rainâ⬠as a result of fossil fuel combustion. 1.01 Apart from human activities, pyrite oxidation also produces acidity, enhancing other weathering reactions. Such as, production of waters with very low pH and high sulphate concentration as a result of buffering the PH. Sulph ate available comes from many anthropogenic sources: they can be coming from farms and agricultural sources. Sulphate fertilizes could be chief source of such contaminants. Sometimes they can come from other cleaning agents agents; and industrial point emissions of sulphuric acid utilised in manufacturing. Main causes of AMD phenomena: 2.0 Understanding the geochemical reactions that generates AMD provides an insight into the three most important reagents that must present ââ¬â Fe 3+, oxygen (O2) and water. Moreover, ââ¬Å"runawayâ⬠AMD production needs Fe3+ dissolved in solution and the activity of different species of bacteria ââ¬Å" Thiobacillus ferrooxidansâ⬠to catalyse the reactions ten thousands times. 2.01 In more details, pyrite is oxidised by the oxygen molecules dissolved in water
Subscribe to:
Posts (Atom)