The Roots And Impacts Of Depression - 1120 Words

The Roots and Impacts of Depression Katherine L. Downey Jefferson Community and Technical College Abstract This paper breaks down depression in every aspect. It starts off discussing the biology of depression by showing what is actually happening on the inside of the body. Then moving on to the symptoms of depression and what a person with depression might be feeling. These symptoms can also help an outsider notice someone going through these stages of depression and get them help. There is also a section that directly discusses three main types of depression. While there are many forms of depression, knowing a few is very important and can be useful if they can be identified in real life. At the end of this paper, treatment plans are†¦show more content†¦Any human, male or female, is prone to the disorder. Nearly one in five people experience a depressive episode at least once in their life. This paper breaks down depression’s impact on the body, the symptoms, the different forms, and possible treatment for people with this disorder. Biology of Depression Studies have shown that three neurotransmitters, norepinephrine, serotonin, and dopamine, can be associated with the cause and course of the depressive disorder. Even though research is still on going, the findings are still intriguing (El Mansari et al., 2010; Torrente, Gelenberg, Vrana, 2012). Depression also seems to be correlated with specific structural features in the brain (Andrus et al., 2012). People with the depressive disorder may have irregularities in certain areas of the brain, such as: the amygdala, the prefrontal cortex, and the hippocampus. For example, some regions of the right cortex show significant thinning in people who face a high risk of developing major depressive disorder (Peterson et al., 2009). Otherwise, the depressive disorder most likely forms as a result from a complex interplay of many neural factors. The roots of depression have not been fully clarified yet, but frequent research is being done to understand what exactly is happening when the body i s undergoing depression. Symptoms Common symptoms of depression are: †¢ Feeling sad or hopeless †¢ Reduced pleasure in activities †¢ Substantial loss or gain in

Electronics Laboratory Report. Free Essays

Laboratory Long report. Electronic laboratory practice Abstract: The aim of this laboratory was to make us familiar with how to use the different types of electronic equipment and how to accurately use them to make measurements. The equipment used in this laboratory included: (i) the signal generator which was used to supply the power used in the various procedures, (ii) The oscilloscope which was used to view and record the waves produced from the AC currents and then make relevant calculations based on that. We will write a custom essay sample on Electronics Laboratory Report. or any similar topic only for you Order Now iii) The DC power supply was used in the first two procedures which involved using the resistors. (iv) Familiarised with the multimeter and used it to take measurements (v) the experiment board which was used to do create most of the circuits and take the necessary measurements. Procedure 1: The measurement of resistance. The resistances of the 5k? and 22k? resistors were found using the theory and by taking the actual readings. The resistances of the resistors were first measured by comparing the colour bands on the resistors to the colour code chart provided. The procedure for this is: there are four bands on each of the resistors, and each colour on the band denotes a specific number on the resistor colour code chart, which gives us the significant figure and the multiplier which is in powers of 10. The values using the colour code were calculated and found to be as follows. * 5. 1k? with a  ±5% tolerance * 21k? with  ±10% tolerance. These nominal values are the ones that are calculated but in reality the actual values of resistance can be a bit different from the ones calculated due to impurities. The actual resistances are measured by using a multimeter, the way this is done is that the resistors are mounted on an experiment board and then the multimeter is connected right across it. The values were recorded and found to be as follows: * 5. 037k? * 21. 047k? | Nominal value| Actual value| 5k? resistor| 5. 1k?  ±5% tolerance| 5. 307k? | 22k? resistor| 21k?  ±10% tolerance| 21. 047k| In conclusion, it can be seen that there was a difference in the calculated nominal values of the resistors and the actual ones which were calculated. But they were still within their tolerance levels; there could be plenty of reasons for that which might include different types of batteries, differences in temperature of the room, impurities in different sections of the experiment board which might have affected the readings. ’ The tolerance level is defined as an allowable variation from a predefined standard. A value from an experiment or a variance is not considered significant unless it exceeds the limit set by the tolerance limit. ’ – www. bridgefieldgroup. om/bridgefieldgroup/glos9. htm For this reason, we can assume these differences in the actual values of the resistors to be insignificant since they were within the stated tolerances. Procedure 2: The measurement of voltage. In this experiment, the principle was to create a voltage divider circuit and to carry out the required measurements were undertaken to prove the principle of the voltage divider. For that, a circuit was created where a supply volt age was applied across two resistors R1 and R2 in series as shown in the figure below. And the two equations shown below were used to make the necessary calculations. Image source: http://www. ermicro. com/blog/wp-content/uploads/2008/11/basic_r01. jpg http://diy. griffshp. com/wp-content/VoltageDivider. jpg The experiment was carried by using two resistors of values R1 equal to 5k? and R2 equal to 22k?. The resistors were mounted on the experiment board and the voltage divider circuit was created. The power was supplied using a +6v power supply and the voltages across each of the resistors was calculated using the Agilent 34401 multimeter. The values were recorded and were found to be as follows: V1=1. 1846v V2=4. 89v The total of the voltages adds up to be 6. 0167v which is roughly about 6v ( the initial voltage supplied) which proves that the voltages are within the required tolerance. To compare these measured values to the nominal values which can be found using the voltage divider equation, substitute the values of R1 and R2 and use V as 6v to find the voltages across each of V1 and V2. v1=6*55+22=1. 11v * V2=6*225+22=4. 88v | Nominal values| Actual values| V1| 1. 11v| 1. 1846v| V2| 4. 88v| 4. 89v| In this experiment it was found that the actual values and the nominal vales were not much different from each other. This could have probably been because of the resistances in the wires or loose connections. But they were both within a tolerance level of 5% which makes the difference insignificant and accountable for experimental error. The outcome of the experiment was that the voltages were shared between the two resistors and the larger resistor got the larger share of the voltage whereas the smaller resistance got the showed smaller voltage passing through it. This proved the values that we found using the nominal calculations of the voltages. Procedure 3: current measurement. In this experiment, we use the current divider rule which is similar to the voltage divider equation except that the way the circuit is constructed is it is in parallel instead of series. The experiment was set up in the method shown below and the necessary calculations were made. The circuit was constructed as shown in the schematic above and a DC voltage of +6v was passed through it, the currents were measured in each of the resistors and found to be: * I1(current across 5k? ) =1. 182A * I2(current across 22k? )=1. 192A (Ps: The rest of the rest of the report could not be completed since the original lab was not completed on time and hence the required information was missing. ) Table of Contents: 1. Procedure 1 2. Procedure 2 3. Procedure 3 How to cite Electronics Laboratory Report., Essay examples

Youth Ministry Yesterday and Today free essay sample

The pastors at the church generally treated youth no differently than they did adults (Senter, p. 8). Many parents did not want their children to attend the Sunday school for fear of persecution (Senter, p. 5). This is how Sunday school started, and originally it was establish to teach youth the skills of reading the Bible. During the early 19th century, dults wanted to establish Bible lessons to keep youth out of trouble, and this evolved into youth having their own church service separate from adults (Senter). Pastors began to treat the youth as young adults, but not equal to adults (Senter). One current trend in some churches is having the youth in the same group as adults for part of the time, and then separate for the other part of the lesson. Youth leaders today are very active in youth ministry and the youth are still allowed to behave like you, rather than part of the working force. We will write a custom essay sample on Youth Ministry Yesterday and Today or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Whether in a separate youth church, or ollowing a newer model of attending church with adults, many youth are not continuing this lifestyle for the long-term. Hundreds of years ago youth ministry may have been developed to teach kids how to read the Bible, and to keep them out of trouble, today youth Ministry has a mission to develop disciple for Christ. The Christian youth of today are to understand the Bible, have a relationship with Christ, and to evangelize. Many youth ministries are succeeding while the youth are in high school, and after they graduate they are falling off track (Bryant, 2008). According to Pastor Dawn Bryant, the attendance of youth starts to fall after each grade. There are more freshmen then sophomores, and less sophomores then Juniors, and seniors are the least likely to attend (Bryant) Overall, after graduation it Just dwindles. The secular world Just lures the youth to them, and it seems more appealing to the teenage mind then Christianity. Your ministry may have some of the same motives it did 300 hundred years ago, but today we are working at digging deeper and changing the lite ot youth We dont Just want to change their lite tor tour years, but for eternity. Our mission should not be to have a mega church of youth, but to have a church that has numbers that stay for the long haul. It is true that many of the passionate youth we may work with today may disappear, and not choose to follow Christ in the future. Even though God has called many of us to continue the mission of making disciple of our youth, and some may go astray, but the mission will continue. References Bryant, D. (2008). The Failure of Youth. Retrieved May 7, 2010, from http:// donbryant. wordpress. com Senter, M. H. (2010). When God Shows Up: A History of Protestant Youth Ministry in America. Grand Rapids, MI: Baker Academics .

The Success of Carrefour Hypermarkets

The Success of Carrefour Hypermarkets Case Background Carrefour is the world largest foodstuff retail chains in volume sales; the hypermarkets have their head office at Levallois-Perret, France; Lars Olofsson and  Amaury de Sà ¨ze opened the company’s first branch on June 3, 1957 at Annecy, France.Advertising We will write a custom essay sample on The Success of Carrefour Hypermarkets specifically for you for only $16.05 $11/page Learn More To remain competitive in the fast changing and competitive retail industry, the company ensures it has established its outlets in strategic locations and has an appealing internal design/layout to facilitate fast shopping and create good impression to its customers (Carrefour Official Website). This paper discusses Carrefour’s location and design strategies. Location To ensure that the company gets to its target customers effectively, it is located in places of high population; areas that they expect to have a large customer base. The company offers fresh products thus, they need to be close to the consumers as possible. The locations include in shopping malls, shopping centres, airports and in emerging towns, depending with the location, the products that the company stocks varies. For example, the company sells fast foods at airports in their kitchen section. In every chain, the company ensures that there is ample parking that customers can use when shopping, the locations are also accessible when using public means and when having a personal means of transport. The location of the hypermarkets offers a pleasant experience to customers, they feel their needs are catered for within any chain; this helps in creating customer loyalty and confidence with a hypermarket (Carrefour Official Website) Internal design and the effect on customers The company offers more than 3,000 non-food items; some of these items include cosmetics, furniture, electronics, office equipments, and kitchenwares. To ensure that customers are able to get products in a shopping mall, the company has created a pleasant and easy to follow internal design; it has divided the malls into sections offering similar goods and they are well label. For example, vegetables are found in the same section, electronic and kitchenware in the same section. When a customer is not able to trace a commodity, the staffs are willing and ready to assist, they are well versed with the structure and the way the chain of supermarkets have been arranged, this assists in easy guidance inside the chain.Advertising Looking for essay on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More It is a policy that all companies operating under the name of Carrefour has the same arrangement strategy; this strategy assists international consumers be able to buy from any chain of the company. To effectively manage the multibillion stores, the company manages an orchestrate team. For an effective oper ation, Carrefour requires an optimal combination of physical and human resources. Well-trained and experienced work force is the greatest asset that an organization can have; it is through human resources that an organisation exists. The company ensures that there is good customer service offered by the staffs at all level; staffs are expected to have high morale and good mastery of the chain of markets and how they are planned. In case a customer feels that he/she want shopping guide, the company is willing to offer some. There are good shopping trolleys that have engine in case someone needs (Fred 12-56). Conclusion The success of Carrefour hypermarkets can be attributed to its strategic locations and quality customer service. The company has appearing internal designs where products of the same categories are placed in the same segment to facilitate fast shopping. Carrefour Official Website. Carrefour UAE. 2011.Web. Fred, David. Strategic Management: Concepts and Cases. New Jers ey: Pearson Education, 2008.Print.Advertising We will write a custom essay sample on The Success of Carrefour Hypermarkets specifically for you for only $16.05 $11/page Learn More

Biography of Philip Emeagwali, Computer Pioneer

Biography of Philip Emeagwali, Computer Pioneer Philip Emeagwali (born August 23, 1954) is a Nigerian-American computer scientist. He achieved distributed computing breakthroughs that helped lead to the development of the internet. His work with simultaneous calculations on connected microprocessors earned him a Gordon Bell Prize, considered the Nobel Prize of computing. Fast Facts: Philip Emeagwali Occupation: Computer scientistBorn: August 23, 1954 in Akure, NigeriaSpouse: Dale BrownChild: Ijeoma EmeagwaliKey Achievement: 1989 Gordon Bell Prize from the Institute of Electronics and Electrical EngineersNotable Quote: My focus is not on solving natures deeper mysteries. It is on using natures deeper mysteries to solve important societal problems. Early Life in Africa Born in Akure, a village in Nigeria, Philip Emeagwali was the oldest in a family of nine children. His family and neighbors considered him a prodigy because of his skills as a math student. His father spent a significant amount of time nurturing his sons education. By the time Emeagwali reached high school, his facility with numbers had earned him the nickname Calculus. Fifteen months after Emeagwalis high school education began, the Nigerian Civil War broke out, and his family, part of the Nigerian Igbo tribe, fled to the eastern part of the country. He found himself drafted into the army of the seceding state Biafra. Emeagwalis family lived in a refugee camp until the war ended in 1970. More than half a million of Biafrans died of starvation during the Nigerian Civil War. The Philip Emeagwali Family in 1962. Wikimedia Commons / Creative Commons 4.0 After the war ended, Philip Emeagwali doggedly continued to pursue his education. He attended school in Onitsha, Nigeria, and walked two hours to and from school each day. Unfortunately, he had to drop out due to financial problems. After continuing to study, he passed a high school equivalency exam administered by the University of London in 1973. The education efforts paid off when Emeagwali earned a scholarship to attend college in the U.S. College Education Philip Emeagwali traveled to the U.S. in 1974 to attend Oregon State University. Upon arrival, in the course of one week, he used a telephone, visited a library, and saw a computer for the first time. He earned his degree in mathematics in 1977. Later, he attended George Washington University to earn a Masters degree in Ocean and Marine Engineering. He also holds a second Masters from the University of Maryland in applied mathematics. While attending the University of Michigan on a doctoral fellowship in the 1980s, Emeagwali began work on a project to use computers to help identify untapped underground oil reservoirs. He grew up in Nigeria, an oil-rich country, and he was someone who both understood computers and how to drill for oil. Conflict over control of oil production was one of the critical causes of the Nigerian Civil War. Computing Achievements Initially, Philip Emeagwali worked on the oil discovery problem using a supercomputer. However, he decided it was more efficient to use thousands of widely distributed microprocessors to do his calculations instead of tying up eight expensive supercomputers. He discovered an unused computer at the Los Alamos National Laboratory formerly used to simulate nuclear explosions. It was dubbed the Connection Machine. Emeagwali began hooking up over 60,000 microprocessors. Ultimately, the Connection Machine, programmed remotely from Emeagwalis apartment in Ann Arbor, Michigan, ran more than 3.1 billion calculations per second and correctly identified the amount of oil in a simulated reservoir. The computing speed was faster than that achieved by a Cray supercomputer. Wikimedia Commons / Creative Commons 4.0 Describing his inspiration for the breakthrough, Emeagwali said that he remembered observing bees in nature. He saw their way of working together and communicating with each other was inherently more efficient than trying to accomplish tasks separately. He wanted to make computers emulate the construction and operation of a beehives honeycomb. Philip Emeagwalis primary achievement wasnt about oil. He demonstrated a practical and inexpensive way to allow computers to speak with each other and collaborate all around the world. The key to his achievement was programming each microprocessor to talk with six other neighboring microprocessors at the same time. The discovery ultimately helped lead toward the development of the internet. Legacy Emeagwalis work earned him the Institute of Electronics and Electrical Engineers Gordon Bell Prize in 1989, considered the Nobel Prize of computing. He continues to work on computing problems, including models to describe and predict the weather, and has earned more than one hundred honors for his breakthrough achievements. Emeagwali is one of the most prominent African-American inventors of the 20th century.

Critical review of Rheumatoid arthritis Essay Example | Topics and Well Written Essays - 1500 words

Critical review of Rheumatoid arthritis - Essay Example However, RA involves an attack on the body by its own immune cells (auto-immune disease). Different cases may have different causes. Infectious, genetic, and hormonal factors may play a role. The disease can occur at any age, but it begins most often between the ages of 25 and 55. The disease is more common in older people. Women are affected 2.5 times more often than men. Approximately 1-2% of the total population is affected. The course and the severity of the illness can vary considerably. The onset of the disease is usually gradual, with fatigue, morning stiffness (lasting more than one hour), diffuse muscular aches, loss of appetite, and weakness. Eventually, joint pain appears, with warmth, swelling, tenderness, and stiffness of the joint after inactivity. Joint involvement in RA usually affects both sides of the body equally -- the arthritis is therefore referred to as symmetrical. Wrists, fingers, knees, feet, and ankles are the most commonly affected joints. Severe disease is associated with larger joints that contain more synovium (joint lining). When the synovium becomes inflamed, it secretes more fluid and the joint becomes swollen. Later, the cartilage becomes rough and pitted. The underlying bone eventually becomes affected. Joint destruction begins 1-2 years after the appearance of the disease. Characteristic deformities result from cartilage destruction, bone erosions, and tendon inflammation and rupture. A life-threatening joint complication can occur when the cervical spine becomes unstable as a result of RA. Other features of the disease that do not involve the joints may occur. Rheumatoid nodules are painless, hard, round or oval masses that appear under the skin, usually on pressure points, such as the elbow or Achilles tendon. These are present in about 20% of cases and tend to reflect more severe disease. On occasion, they appear in the eye where they sometimes cause inflammation. If they occur in the lungs, inflammation of the lining of the lung (pleurisy) may occur, causing shortness of breath. Anemia may occur due to failure of the bone marrow to produce enough new red cells to make up for the lost ones. Iron supplements will not usually help this condition because iron utilization in the body becomes impaired. Other blood abnormalities can also be found, for example, platelet counts that are either too high or too low. Rheumatoid vasculitis (inflammation of the blood vessels) is a serious complication of RA and can be life-threatening. It can lead to skin ulcerations (and subsequent infections), bleeding stomach ulcers (which can lead to massive hemorrhage), and neuropathies (nerve problems causing pain, numbness or tingling). Vasculitis may also affect the brain, nerves, and heart causing strokes, sensory neuropathies (numbness and tingling), heart attacks, or heart failure. Heart complications of RA commonly affect the outer lining of the heart. When inflamed, the condition is referred to as pericarditis. Inflammation of heart muscle, called myocarditis, can also develop. Both of these conditions can lead to congestive heart failure characterized by shortness of breath and fluid accumulation in the lung. Lung involvement is frequent in RA. Fibrosis of the lung tissue leads to shortness of breath and has been reported to occur in 20% of patients with RA. Inflammation of the

Developmental Biology Essay Example | Topics and Well Written Essays - 2250 words

Developmental Biology - Essay Example After certain number of divisions the macromeres give rise to a pair of blastomeres termed as teloblasts M, N, Q and O/P. It is from these teloblasts that the segments of the annelid are derived in the adult. To draw our fate map we used alkaline phosphatase to help in tracing out the cell lineage of many of the adult structures. Alkaline phosphatase being naturally present in a cell and was an ideal candidate as a marker to trace out the fate map. The blastomeres were injected with high concentrations of alkaline phosphatase and then allowed to develop into their corresponding adult structures. The annelid was then bathed with a colourless substrate which coloured on reacting with alkaline phosphatase. Using this we were able to show that the blastomere A, B & C most probably develops into the ectoderm. The blastomere D though proved to be the most vital with most of the endoderm and mesoderm structures being derived from it. We also show the individual fates of each of the teloblasts and by alternating the time of injecting alkaline phosphatase we were able to deduce many vital facts about metamerisation. From our study we came to the conclusion that most probably the segments are produced from the posterior to the anterior direction and that segmentation begins at a very early stage of asymmetric cell division of the teloblasts. Introduction: The phylum Annelid consists of many species that range from the humble earthworm all the way to the maligned leech, but one common feature that binds them all is their segmented body. This segmentation is termed as Metamerism and each ring like segment is called a metamere. In fact the word Annelid is derived from the Latin word Annelis meaning rings. The Annelid body can be further bisected into two equal halves implying that the body architecture is bilaterally symmetrical. Annelids are also triplobalstic i.e. the embryo has 3 distinct germ layers namely the mesoderm, endoderm and ectoderm. It is from these 3 distinct germ layers that all the organ systems arise. The ectoderm that forms the outer layer of the embryo produces the epidermis and the nervous system, the endoderm which forms the inner most layer of the embryo gives rise to the digestive system and its related organs and sandwiched in between the two layers is the mesoderm which produces the circulatory system, muscles a nd connective tissue. As the yolk in the Annelid embryo is equally spaced out a Holoblastic cleavage pattern is seen and thus the cleavage furrow extends through the entire egg. The cleavage pattern seen in Annelids is a Spiral Cleavage which is also seen in other organisms such as sea urchins. During the first of cleavage, the embryo is divided into 4 cells each of which is called a blastomere and are labelled as A, B, C and D. All the blastomeres are of equal size except for Blastomere D which is slightly larger than the rest. The second round of cleavage produces an unequal division of 4 large blastomeres called Macromeres and 4 smaller blastomeres called Micromeres. The macromeres are labelled as A1, B1, C1, and D1 and the micromeres are labelled as a, b, c, and d. The macromeres keep on dividing to produce more macromeres and micromeres and eventually the entire organism is formed. Of special note is the D1 blastomere which further divides to