Why Not Eat Insects Example

Why Not Eat Insects Example Why Not Eat Insects – Coursework Example Why Not Eat Insects? Marcel Dicke in the Video â€Å"Why not eat insects† s that that 80% of the world’s animals walk on six legs; therefore, they are insects (Dicke). In the world’s biodiversity, there are 6 million species of insects. This leads to the assertion that the world is a planet of insects and not humans since they are more abundant than humans. Dicke argues that insects are significant contributors of the economy, even though people may not be aware of the fact; insects contribute free of charge towards developing the economy. Therefore, insects are not only contributors to the economy but also major delicacies in various parts of the world such as china (Dicke). However, while people in some parts knowingly consume insects as part of their daily diet, almost all people in the world consume insects unknowingly. This occurs because food processing makes use of products that are derived from insects. Therefore, food additives such as natural dyes are p roduced by insects. This means that insects contribute in a large scale to feeding the world’s population.Dicke observes that the world population is increasing dramatically; hence, there is a corresponding increase in the demand for food. Therefore, insects offer the only solution to the escalating global food problem. In addition, insects have a higher nutrient content in comparison to regular protein sources. Therefore, he argues that it is more economical to invest in insect production than investing in other forms of food. Evidently, 70% of the global agricultural land is used for livestock production (Dicke). This land would be significantly enough to produce insects to feed the entire world. Already over 80% of the world’s population are eating insects; therefore, the remaining 20% should follow suit (Dicke). All that is required is changing perceptions and mindsets in as far as insects are concerned. A number of entrepreneurs have already taken up serving insec ts as delicacies in their restaurants; hence, kick starting the road towards a world that values insects as a primary source of nutrition. Dicke, Marcel. Why not eat insects? TED, July 2010. Web. 15 September 2014.

Globalization, Unemployment, and Recession Links

Globalization, Unemployment, and Recession Links A reader recently sent me this e-mail: It seems to me that we are now engaged in an economy that may look different from any we have experienced. The Globalization of the economy has created huge firm closures in America expecially in manufacturing and forced lower wages on those employed by this sector. Typically and historically manufacturing jobs have created higher wages in this country but now we see all the rules are changing. Do you believe globalization will bring new trends to the relationship between rececession/depression and firm closures? I believe it already has begun. - Before we begin, Id like to thank the e-mailer for her very thoughtful question! I dont think globalization will change the relationship between recessions and firm closures, since the relationship between the two was fairly weak to begin with. In Are recessions good for the economy? we saw that: We do not see great differences in firm closures between periods of high growth and periods of low growth. While 1995 was the beginning of a period of exceptional growth, almost 500,000 firms closed shop. The year 2001 saw almost no growth in the economy, but we only had 14% more business closures than in 1995 and fewer businesses filed for bankruptcy in 2001 than 1995. Competition between firms in periods of growth: During a period of high economic growth, some firms still perform better than others. Those high performing ones can often squeeze weaker performing ones out of the marketplace, causing firm closures. Structural changes: High economic growth is often caused by technological improvements. More powerful and useful computers can drive economic growth, but they also spell disaster for companies that manufacture or sell typewriters. Would 0% Unemployment Be a Good Thing? Cyclical Unemployment is defined as occuring when the unemployment rate moves in the opposite direction as the GDP growth rate. So when GDP growth is small (or negative) unemployment is high. When the economy goes into recession and workers are laid off, we have cyclical unemployment. Frictional Unemployment: The Economics Glossary defines frictional unemployment as unemployment that comes from people moving between jobs, careers, and locations. If a person quits his job as an economics researcher to try and find a job in the music industry, we would consider this to be frictional unemployment. Structural Unemployment: The glossary defines structural unemployment as unemployment that comes from there being an absence of demand for the workers that are available. Structural unemployment is often due to technological change. If the introduction of DVD players cause the sales of VCRs to plummet, many of the people who manufacture VCRs will suddenly be out of work. Thats my take on the question - Id love to hear yours! You can contact me by using the feedback form.

Price Elasticity Essay Example | Topics and Well Written Essays - 250 words - 1

Price Elasticity - Essay Example In this case, if goods A and B are complementary, they have to be purchased together for a consumer to reap their utility. Complementary goods have a negative cross elasticity of demand; this implies that the demand of good A increases when the price of good B is decreased, where goods A and B are complementary goods. Conversely, the demand for A is decreased when the price of B is increased. This basically means that when higher quantity of A is demanded due to price decline, the demand of B will equally increase since A cannot be used without B. substitute goods exhibit positive cross-price elasticity of demand. Suppose X and Y are substitute goods. When price of Y goes up, consumers will go for X at a cheaper price but with similar utility as Y The income elasticity of demand measures the degree of change in demand of a commodity in response to changes in consumer’s income level. Inferior goods are those goods that a person may consider using when they do not have enough money, for example a cheap car. With little income, the demand for cheap cars will go up. Once the income increases, people tend to prefer more expensive cars and hence the demand of cheap cars goes down. Normal goods have a normal demand curve. In this case, the demand of a normal god will increase as the level of income increases. Conversely, the demand of a normal commodity will decrease with the level of income (Tobin, 1987). Various aspects including the availability of substitute products or goods, necessity degree and the greater the elasticity of good demand mostly influence the price elasticity of goods demands. Generally, demand tends to be elastic when there is availability of substitute goods in the market (Landsburg, 2011). In this case, the greater the substitute products in the market would result to demand elasticity. The best example is the Coca-Cola and Pepsi situation where the market is always flooded with availability of substitute products thus making the demand

Semantics Lesson Essay Example | Topics and Well Written Essays - 1000 words

Semantics Lesson - Essay Example Within this view, facial expressions, sounds, body language, as well as proxemics, have semantic (significant) content, and each one encompasses various branches of study. Things such as punctuation and paragraph structure, in written language, have semantic content. Some of the main aspects of semantics include lexical competence and sociolinguistic competence (Dragon & Fair-Bumbray, 2007). This paper will create a semantics lesson plan focusing on lexical competence. Lexical competence or ability is a fancy linguistic word, which refers to the way language learners differentiate the disparity between words in a similar â€Å"family† (for instance a seat = stool, chair or bench). Semantics is significant because, in English, semantics (word meaning) is the key to unlocking understanding in words (Dragon & Fair-Bumbray, 2007). Also, in order for people to communicate, as well as comprehend, they must understand or be aware of the meaning of words. Secondly, they should know a bank of words from which to select from and finally they must know the strategies of supporting themselves in word retrieval. Semantics is significant because choosing the accurate words (or failure to) can have grave social and academic/professional consequences (Dragon & Fair-Bumbray, 2007). The old strategy that educators have been using in their semantics lessons is visualization or imagery. This, even though efficient, has not managed fully to assist students, especially those who lack full competence in English, understand meaning in words. This paper, therefore, advocates for a new strategy, Word Hierarchies or Graphic Organizers, which is easy to understand and practical when it comes to teaching semantics. The target grades for this lesson will be students from 5th to 8th grade. This is a comprehensive classroom setting which consists of 24 students (12 regular /8 special /8 ELL). Such a lesson would happen in a chain of mini-lessons using visualization to pass meaning thro ugh speaking and in writing, though the concepts might be used in any subject area where learners are projected to derive and/or express meaning with words. Students use their visualization abilities and apply them in learning a new strategy for conveying meaning, semantic mapping. Word hierarchies, in this lesson, will be used to scaffold students prior to their introduction of the approach of semantic mapping. The aims of this lesson are for learners to examine or inspect word families and arrange related words by intensity or degree. The standards recognized have a widespread thread, which learners apply while using language (Cruse, 1986). The anticipation is that when communicating, learners will choose words suitable for the audience and context, and also utilize strategies for generating, expanding, as well as retrieving vocabulary. The standards of this lesson include 6LD-Q3, 6LD-V10 and 8LD-O7. 6LD-Q3 will identify mood, tone or emotion expressed in oral communication. 6LD-V 10, on the other hand, will determine alternating word choices using thesauri, dictionaries or other resources. 8LD-O7 finally will distinguish and create informal and formal language suitable to the purpose and audience, including recognizing how to use words for specific effect. As a way of differentiating instruction to meet needs of different learners, this paper will advocate for metacognitive awareness and task strategies. Metacognitive aware

Statistics Essay Example for Free

Statistics Essay 1. Age, income, length of labor, return to work and number of hours working per week 2. Mean and standard deviation were used to describe the length of labor. These were appropriate since mean and standard deviation can be calculated on an interval level of measurement. 3. Range could also be used to describe the length of labor since this statistic can be used on interval data with no natural zero point. 4. The distribution of scores was similar for the experimental and control groups for length of labor. The experimental group had a mean of 14.63 hours and the control group had a mean of 12.79 hours which is a difference of less than 2 hours with a SD of 7.78 for experimental and 7.2 for control. 5. The experimental and control groups were similar in the type of feeding. More people fed with a bottle than breast or breast and bottle in the experimental and control group. The percentages in both were lowest for breast and bottle with 6.3% for experimental and 5.6% for control. 6. Married was the marital status mode for the experimental group and control group since it was the largest group. The frequency and percentage are 25 and 78.1% for the experimental group and 31 and 86.1% for the control group who are married. 7. Yes a median can be determined for the educational data. The median for the experimental and the control group are the people in the some college group. The median is the â€Å"middle† category and can be determined for ordinal data like education. 8. The findings from this study cannot be generalized to Black women since the sample size is so low in the experimental group and there are no Black women in the control group. Black women might have different self- care interventions to manage post- partum fatigue than white women. 9. There is a note at the bottom of the table that mentions that there is missing data. Perhaps some mothers did not reveal that data. 10. The sample was adequately described. However, adding information about any complications before or during birth, the type of delivery for example C-section vs. natural, or if the women had any help such as a nanny would add to the description.

Ellis Island :: essays research papers fc

Ellis Island In the 1600's, Ellis Island was known as Gull Island by the Mohegan tribe and was simply two to three acres. During high tide, the island could barely have been seen above the rising waters. After being discovered for its rich oyster beds in 1628, Dutch settlers renamed it Oyster Island. And then in 1765, which was the hanging of Anderson the Pirate, the island was again renamed the Gibbet Island, after the instrument used to hang him. Finally on January 20, 1785, Samuel Ellis purchased the property and gave it his name, which is still the name of the island today, Ellis Island After passing through a few generations of Ellis's descendents, the island was bought by the state of New York, and then sold to the federal government in 1808 for ten thousand dollars. During the years of 1812 to 1814, the United States Army erected Fort Gibson, which was eventually taken apart by the government in 1861. In 1876, the United States Navy used Ellis Island as a weapons warehouse, storing 260,000 pounds of powder. However, complaints from nearby New Jersey residents lead to the removal of the storage area in 1890. The original station, Castle Garden at the Battery in lower Manhattan, could not handle all of the immigrants coming in. To have room for the immigrants, the island grew to 3.3 acres. In the next two years, Ellis was enlarged to fourteen acres in order to hold all of the immigrants and support buildings. By January 1, 1892, Ellis's first immigration station, a two story high structure of Georgia pine, was open ready for business The most impressive room in the building was the registry room. It measured 200 feet by 100 feet, and had an impressive fifty-six foot arched ceiling. Twelve narrow aisles, divided by iron bars, channeled new arrivals to be examined by doctors at the front of the room. The officials who worked at the island, however, were not impressed by the architecture. In fact, they constantly complained of leaky roofs, and other problems within the building. After long and heated arguments between experts, it was decided that the Superintendent of Construction was extremely inexperienced, and that there was "recklessness in the handling of public money," on the part of the Treasury Department and the Immigration Bureau of Officials. The entire building, excluding the hospitals, had been built shoddily. After news of the problems with the building had been in the media, a lot of people involved with the construction of the building resigned their positions.

The Myer-Briggs Type Indicator

The Myer-Briggs Type Indicator (MBTI) is the most widely used personality assessment instrument in the world. More than two million people complete it annually in the world (Robbins & Barnwell, 2008). The reliability of the MBTI instrument for management is supported by over fifty years of research and use, proving to be a reliable tool for management and human resource development, both personal and career counselling, and even for team-building and improving communication. Comprising 100 personality tests, it assesses how people act and feel in various situations (Michael & William, 2009). MBTI test results present an individual’s personality preferences thus helping individuals better understand themselves and assisting them in making career choices. Possible applications for the MBTI include communication, conflict resolution, personal growth and development, decision making and problem solving (Thompson, 2010, p19). Also the MBTI helps management to encourage groups of individuals to learn about themselves, each other, and better organize group resources to achieve group goals. On the basis of the answers individuals give to the test, the MBTI classifies individuals into sixteen unique personality based on four dimensions (Robins, 2009). They are Extroverted or Introverted (E or I), Sensing or Intuitive (S or N), Thinking or Feeling (T or F), and Judging or Perceiving (J or P). Extroverted-Introverted – method of functioning. Extroverted individuals are outgoing, sociable and assertive, they tend to act, then reflect, and then act again to gather information and reflect on it before arriving at a decision. Introverts are quiet and shy, prefer to reflect, then act, then reflect again to discuss possible alternatives before arriving at a decision (Michael & William, 2009) Sensing-Intuitive – how individuals take in information. Individuals who are sensing are more likely focus on detail and what is actually present, are practical and prefer routine and order. They always trust their xperience and focus on what is real here and now. By contrast, individuals who prefer intuition rely on unconscious processes and tend to trust information that is more abstract or theoretical, to focus more on implications and inferences, to look at the â€Å"big picture† to gather information (Robins, 2009). Thinking-Feeling – how individuals make decision. Those who prefer thinking are more logical, causa l, and more consistent in their perspective. They measure decision by what seems reasonable and tend to use an analytical approach to problem solving. Conversely, those who prefer feeling tend to introduce their own values and emotions into the decision making process. However, where situations differ, their value and emotion can be variable. Therefore, their decision-making is based on the situation and their emotional involvement in that situation (Mohammad, 2009). Judgment-perceiving – individual’s lifestyle. Judgment types desire control and prefer their worlds to be orderly, planned and scheduled – everything in its place. By contrast, those who are perception orientated prefer an open, flexible, and unstructured lifestyle (Michael & William, 2009). According to the research by McCare and John (2002) strong relation exists between individual personality and performance in teams. The four dimensions can classify individuals into sixteen personality type. ESTJs are the organisers in the team. They are realistic, practical and prefer order, like use reason and logic to handle problems. They have a natural head for business or group dynamics. Consequently, they like to organise and run activities (Carlopio & Andrewartha, 2008). INTJs are the monitors and the evaluators in the team. They usually have original minds and strongly focus on their own ideas and purposes. Additionally, they are critical, independent, determined and often stubborn. The ENTPs are conceptualisers. They are individualistic, versatile and focus on innovation. They are innovative in solving challenging problems, but may neglect routine assignments. According to the research, 13 business people who create super-successful firms such as Microsoft, Apple Computer, Sony, FedEX and Honda Motors found that all 13 were intuitive thinkers (Robins, 2009). This result is especially interesting because MBTI suggests only 5% of the population are intuitive thinkers. In addition, while more and more people are using MBTI in Australia today, simultaneously the number of users is starting to rise in some Asian countries as well (Henry, 2010). The MBTI is mainly used in organisations including banks, hospitals, IT firms, universities, emergency service, finance companies, MNC and even the Australian Defence Forces (Robins, 2009). The results from these organisations reveal that, in general, HR managers and educated managers tend to have higher intuition scores. On the contrary, manager in high regulated organisations such as the police, armed forces and financial management tend to have lower scores in intuition (Mohammad, 2009). Example At the beginning of my university life, I experienced course selection mistake. I chose accounting for my major simply because I thought I was good at mathematic. Unfortunately, I didn't understand my personality very well. After one semester, I realised accounting was not an appropriate subject for me. I’m not a conscientious person, I always leave my belongings around, often forget to put things back in their proper place and make a mess of everything, often being not well prepared before class. Further, I don't pay attention to details and frequently neglect routine assignments. Consequently, the formal demands of accounting are not suitable for me. However, having finished the MBTI test, I found I’m an ENTP type person, which â€Å"openness to experience† person. I’m always optimistic about life and even in a difficult environment, I regard new things as challenges and widening my experience, which means I don't give up readily. I don't perceive such things as failures and losses and am not upset by such events. Secondly, I’m an imaginative person. I have diverse interests. I like trying and exploring new things and challenging new environments, so I always look forward to discovering new things. Thirdly, I have excellent ideas, spend time reflecting on things, and constantly try to search for ways to improve my previous ideas (MBTI test). Consequently, I changed my major to Economics, a subject better suited to my personality. Recommendation Both managers and employees need to understand the benefits of using the MBTI (Michael & William, 2009). From the manager’s point of view, MBTI can improve management skills; enhance inter-organisation communication and developmental efforts. From the employee’s viewpoint, an understanding of individual’s personalities can help organisations reduce group conflict, improve work relations and team development, further achieve a positive work environment, and increase work-group performance and productivity (John, 2008). In addition, the more MBTI is appropriately used in an organisation, the more the management would see its value (Roselle, 2009). When the MBTI is used frequently in conjunction with other management skills, it helps individuals to gather the insight they need for personal growth and development, to achieve decision making and resolve problem skills, and to help groups better understand themselves and each other in a team environment and different situation (Peter & Garry, 2004). Finally, having gained the feedback from using the MBTI instrument, a careful analysis of the information helps in arriving at fresh policy decision. Belbin (2006) found that groups with mixed roles can be more productive than other groups. It means different personal and professional roles have their own characteristic; this can bring many benefits if a group contains a mixture of personality types, each type filling a particular role in the dynamics of the group. For instance, having completed the MBTI test, I understood myself very well, my personal characteristic, my strengths and my weaknesses. Consequently, a design group manager has invited me to join his group on the basis of my personal strengths, thus complementing the strengths of the group, all of us having previously done the MBTI test. I found we all have different group professional roles, Member â€Å"A† is always focused on the task, is highly motivated to achieve goals and influences group members to achieve goals more smoothly. Member â€Å"B† is a good listener and supporter, friendly to everyone, helps group member to resolve destructive conflicts, and facilitate group cooperation. Member â€Å"C† is an enthusiastic person who always encourages group members to explore new ideas and problem solving skills. As we talk in a comfortable environment, our group relationship has improved, leading us to communicate more with other group members. Thus our work-group performance and productivity have increased.

As/Ad Model

Macroeconomics – Chapter 10: The Aggregate Demand/Aggregate Supply Model * Keynesian Economics – Economists who focused on the short run * John Maynard Keynes – their leading advocate the originator of macroeconomics as a separate discipline from micro * Classical Economists – economists who focused on long-run issues such as growth * Aggregate Demand Management – government’s attempt to control the aggregate level of spending in the economy * Equilibrium Income – the level of income toward which the economy gravitates in the short run because of the cumulative cycles of declining or increasing production * Potential Income – the level of income that the economy is technically capable of producing without generating accelerating inflation * Paradox of Thrift – and increase in savings can lead to a decrease in expenditures, decreasing output and causing a recession * Multiplier Model – the model that was meant to ca pture Keynesian economics * This model emphasized aggregate output fluctuations * Explored why those output fluctuations generally would not lead to wild fluctuations in output – depressions * Instead lead to smaller fluctuations – recessions * The AS/AD Model – aggregate supply/aggregate demand Is a pedagogical model – designed to give a framework to organize thinking about macro economy * Does not focus on problems that occur because of interactions between individuals * Consists of 3 curves * Short-run aggregate supply (SAS) curve * Aggregate demand (AD) curve * Long-run aggregate supply (LAS) curve – highest sustainable level of output * The price level of all goods is on the vertical axis and the aggregate output is on the horizontal axis * It is a historical model – starts at one point in time and says what will likely happen when changes affect the economy * Aggregate expenditures (demand) – the sum of consumption, investment, government spending, and net exports – p. 234 * Discuss the historical development of macroeconomics * The depression began in the 1930s and lasted 10 years * During he depression output fell by 30% and unemployment rose to 25% * This was the beginning of macro’s focus on the demand side of economics * Keynes started asking what short run forces were causing the Depression and what society could do to counteract them * This created the framework that focuses on short-run issues such as business cycles and how to stabilize output fluctuations * By the 1950s, Keynesian economics had been accepted by most economists and taught almost everywhere in the US * In the 1970s inflation became a serious issue which meant that the multiplier model was not very helpful * It assumed that the price level is fixed * The standard model taught in macro then shifted to the Aggregate Supply/Aggregate Demand (AS/AD) model * Explain the shape to the aggregate demand curve and what factors s hift the curve * Aggregate demand (AD) curve – a curve that shows how a change in price level will change aggregate expenditures on all goods and services * It is downward-sloping The reasons for the downward slope are due to the: * Interest rate effect – the effect that a lower price level has on investment expenditures through the effect that a change in the price level has on interest rates – p. 234 * International effect – as the price level falls (assuming the exchange rate does not change), net exports will rise – p. 234 * Money wealth effect (real balance effect) – a fall in the price level will make the holders of money richer, so they buy more – p. 234 * The multiplier effect strengthens each of these effects * Multiplier effect – the amplification of initial changes in expenditures – p. 235 * Shifts in the AD curve – means that at every price level, total expenditures have changed – p. 236 * Shift factors of aggregate demand: Foreign Income – recessions and expansions occurring in other countries cause demand for US goods decreases or increases respectively * Exchange Rate Fluctuations – when a country’s currency loses value, relative to foreign currencies, demand for foreign goods decreases and demand for domestic goods increases; exports also increase * Distribution of income – * Expectations – expectations of future output and future prices * Government Policies – spending policy, tax policy, etc – p. 238 * When consumption expenditures increase, the AD curve shifts to the right, when consumption expenditures decrease, the AD curve shifts to the left * Explain the shape of the short-run aggregate supply curve and what factors shift the curve – p. 39 * Short-run Aggregate Supply (SAS) curve – a curve that specifies how a shift in the aggregate demand curve affects the price level and real output in the short ru n, other things constant * The curve is upward-sloping which means that other things constant, an increase in output is accompanied by an rise in price level * When aggregate demand increases, the price level rises * Two reasons that the SAS curve slopes upward, other things constant: * Upward-sloping curves in auction markets * Firms’ tendency to increase their markup when demand increases * The shape of the SAS curve reflects two different types of markets * The auction market – markets represented by the supply/demand model * Posted-price markets – prices are set by the producers and change infrequently * Often called Quantity-adjusting Markets – markets in which firms respond to changes in demand primarily by changing production instead of changing their prices * Shifts in the SAS curve: – p. 239 Changes in input prices, such as wages or supply costs * If input prices rise, the SAS curve shifts up, if input prices fall, the SAS curve shifts dow n * Change in the productivity factors of production * An increase in productivity shifts the curve down * A reduction of input costs per unit of output shifts the curve down * Changes in import prices of final goods * Import prices are a shift factor because they are a component of an economy’s price level * When import prices rise the SAS curve shifts up * Changes in excise and sales tax * Higher sales tax shifts the curve up * How much will the curve shift: The percentage change in wages and other factor prices minus changes in productivity * If productivity rises by 3% and wages rise by 7%, we can expect that the price level will rise by 4% for a given level of output * Explain the shape of the long-run aggregate supply (LAS)curve – p. 241 * Long-run aggregate supply (LAS)curve – a curve that shows the long run relationship between output and the price level * The position of the LAS curve is determined by potential output * Just where to position the curve is somewhat in debate * The range is bounded by a high level of output and a low level of output and the LAS curve can be thought of as being the mid-point of that range * The shape of the LAS curve * The LAS curve is vertical At potential output all resources are being fully utilized * A rise in the price level mean that the price of goods and factors of production, including wages, will rise * Show the effects of shifts of the aggregate demand and aggregate supply curves on the price level and output in both the short run and long run – p. 243 * Short run equilibrium is where the SAS curve and the AD curve intersect * If the AD curve shifts to the right * Price level will rise * Output will increase * If the SAS curve shifts up * Price level will rise * Output will decrease * Long run equilibrium is where the LAS and AD curves intersect * AD curve can only determine price level, it has no effect on output * If the AD increases, price levels rise Explain how dynamic feedback effects can destabilize the economy – p. 246 * * Discuss the limitations of the macro policy model – p. 250 * Fiscal policy – changing government spending and tax policy is a slow process * Changes cannot be completed in a timely fashion * Potential output cannot be measured accurately * Many other interrelationships that the model does not take into account * Rate of unemployment fluctuates and is difficult to predict * Falling asset prices and falling price level on expectations of aggregate demand * When there are pressures for price levels to fall there are also pressures for asset prices to fall

Free Essays on Seasonal Affective Disorder

Introduction: In the recent years interest in seasonal affective disorder (SAD) has grown dramatically. The disorder, also known as winter depression, has a recurrent pattern of fall/winter onset and spring remission. Since the beginning of contemporary investigation into SAD, it has been compellingly related to seasonal change in sunlight. Historical Overview: Observations that affective illnesses are sensitive to seasonal and environmental influence was key to ancient theories about the origins of disease. In 460-370 B.C. Hippocrates taught that â€Å"it is cheifly the change of seasons which produce diseases, and in the seasons the great changes from cold to heat,† (Rosenthal & Blehar, p. 13). In the 4th century A.D. Posidonius summarized the views of many ancient physicians when he noted that mania is â€Å"an intermittent disease, which proceeds through a periodical circuit†¦.It repeats itself once a year or more often†¦..Melancholy occurs in autumn whereas mania occurs in summer,† (Rosenthal & Blehar, p.14). There are many early desriptions of patients who were probably suffering from SAD. According to Norman E. Rosenthal, one of the earliest noted examples of individuals with seasonal affective disorder are from the 17th century. Ann Grenville (1642-1691), suffered for numerous years from â€Å"regularly recurring winter depressions and summer manias,† (Rosenthal & Blehar, p.14). In 1825, the French psychiatrist Esquirol described a male patient from Belgium who for three consecutive winters had suffered depressive episodes, which lifted in the spring. The psychiatrist advised the patient to spend the following winter in Italy, and his winter depression resulted much milder (Partonen, p.3). In 1946, the German physician, Hellmut Marx, recognized winter depression in four men during an Arctic winter and even described the overeating that often accompanies the condition. Marx identified the lack of light as a... Free Essays on Seasonal Affective Disorder Free Essays on Seasonal Affective Disorder Introduction: In the recent years interest in seasonal affective disorder (SAD) has grown dramatically. The disorder, also known as winter depression, has a recurrent pattern of fall/winter onset and spring remission. Since the beginning of contemporary investigation into SAD, it has been compellingly related to seasonal change in sunlight. Historical Overview: Observations that affective illnesses are sensitive to seasonal and environmental influence was key to ancient theories about the origins of disease. In 460-370 B.C. Hippocrates taught that â€Å"it is cheifly the change of seasons which produce diseases, and in the seasons the great changes from cold to heat,† (Rosenthal & Blehar, p. 13). In the 4th century A.D. Posidonius summarized the views of many ancient physicians when he noted that mania is â€Å"an intermittent disease, which proceeds through a periodical circuit†¦.It repeats itself once a year or more often†¦..Melancholy occurs in autumn whereas mania occurs in summer,† (Rosenthal & Blehar, p.14). There are many early desriptions of patients who were probably suffering from SAD. According to Norman E. Rosenthal, one of the earliest noted examples of individuals with seasonal affective disorder are from the 17th century. Ann Grenville (1642-1691), suffered for numerous years from â€Å"regularly recurring winter depressions and summer manias,† (Rosenthal & Blehar, p.14). In 1825, the French psychiatrist Esquirol described a male patient from Belgium who for three consecutive winters had suffered depressive episodes, which lifted in the spring. The psychiatrist advised the patient to spend the following winter in Italy, and his winter depression resulted much milder (Partonen, p.3). In 1946, the German physician, Hellmut Marx, recognized winter depression in four men during an Arctic winter and even described the overeating that often accompanies the condition. Marx identified the lack of light as a...

How Do Whales, Dolphins, and Porpoises Sleep

How Do Whales, Dolphins, and Porpoises Sleep Cetaceans (whales, dolphins, and porpoises) are voluntary breathers, meaning they think about every breath they take. A whale breathes through the blowhole on top of its head, so it needs to come up to the water surface to breathe. But that means the whale needs to be awake to breathe. How does a whale get any rest? The Surprising Way a Whale Sleeps The way a cetacean sleeps is surprising. When a human sleeps, all of his brain is engaged in being asleep. Quite unlike humans, whales sleep  by resting one half of their brain at a time. While one half of the brain stays awake to make sure the whale breathes and alerts the whale to any danger in its environment, the other half of the brain sleeps. This is called unihemispheric slow-wave sleep. Humans are involuntary breathers, meaning they breathe without thinking about it and have a breathing reflex that kicks into gear when they are sleeping or are knocked unconscious. You cant forget to breathe, and you dont stop breathing when you are asleep. This pattern also allows whales to keep moving while sleeping, maintaining position in relation to others in their pod and staying aware of predators such as sharks. The movement may also help them maintain their body temperature. Whales are mammals, and they regulate their body temperature to keep it in a narrow range. In water, a body loses heat 90 times as much as it does in air. Muscular activity helps keep the body warm. If a whale stops swimming, it may lose heat too fast. Do Whales Have Dreams When They Sleep? Whale sleep is complex and still being studied. One interesting finding, or lack thereof, is that whales do not appear to have REM (rapid eye movement) sleep that is characteristic of humans. This is the stage in which most of our dreaming occurs. Does that mean that whales dont have dreams? Researchers dont yet know the answer to that question. Some cetaceans sleep with one eye open as well, changing to the other eye when the brain hemispheres change their activation during sleep. Where Do Whales Sleep? Where cetaceans sleep differs among species. Some rest on the surface, some are constantly swimming, and some even rest far below the water surface. For example, captive dolphins have been known to rest at the bottom of their pool for a few minutes at a time. Large baleen whales, such as humpback whales, can be seen resting on the surface for half an hour at a time. These whales take slow breaths that are less frequent than a whale thats active. They are so relatively motionless on the surface that this behavior is referred to as logging because they look like giant logs floating on the water. However, they cant rest for too long at a time, or they may lose too much body heat while inactive. Sources: Lyamin, O.I., Manger, P.R., Ridgway, S.H., Mukhametov, L.M., and J.M. Siegal. 2008. Cetacean Sleep: An Unusual Form of Mammalian Sleep. (Online). Neuroscience and Biobehavioral Reviews 32:1451–1484.Mead, J.G. and J.P. Gold. 2002. Whales and Dolphins in Question. Smithsonian Institution.Ward, N. 1997. Do Whales Ever...? Down East Books.

Agglomeration Economies and Equilbrium Location of Firms Term Paper

Agglomeration Economies and Equilbrium Location of Firms - Term Paper Example gglomeration is widely practiced by the urban metropolis to ensure good supply channels, trained workers, and infrastructure that will be in compliance with the nature of the industry. Owing to agglomeration economies, people and firms give attention to a particular region of operation or a specific geographical region. The basic perception of agglomeration economies is facilitation of production when economic activity is clustered and such notions are developed to suffice the ultimate end of forming and developing a city. Multiple factors like types of economies formed, network connections, and the advantages and disadvantages that may result in the growth of cities.  Two distinct types of agglomeration economies are operating in the global economic domain: urbanization economies and localization economies. An urbanization economy is related to citys population and level of employment along with the multiplicity of its productive constitution. On the contrary, a localization economy is associated with a citys specialization in one specific segment. According to Sassen producer services, unlike other types of services are mostly not as reliant on the proximity of the buyers as consumer services. Thus, concentration of production in suitable locations and export, both regionally and internationally are feasible. Production of these services benefits from the nearness to other services, especially when array of specialized firms are available. These firms obtain agglomeration economies when they settle in the vicinity of the others that are sellers of key inputs necessary for combined production of certain service offerings. This is a valid reason for New Yorks losing of corporate headquarters for the past few decades and the number and employment of firms which were servicing such headquarters went on increasing rapidly. Sassen also highlighted another kind of agglomeration economy which comprises amenities and lifestyles which large urban centers can offer to