The Menstrual Cycle Essay - 769 Words

The menstrual cycle occurs in the uterus and the ovary as a part of making sexual reproduction possible. The menstrual cycle is a monthly occurrence and happens so the ovary can produce eggs and the uterus can get ready for an egg becoming fertilized. (Wikipedia) The menstrual cycle is a complex cycle and is controlled by hormones produced by many different glands. The hypothalamus causes the pituitary gland to produces chemicals which then cause the ovaries to produce the sex hormones oestrogen and progesterone. Each gland and structure is affected by the activity of another which is a biofeedback . The menstrual cycle has been assumed to last around 28 days and happens in four stages, the menstrual phase (day 1-5), follicular phase (day†¦show more content†¦Negative feedback is caused from the low levels of oestrogen, sending a message to the pituitary gland to increase the levels of FSH and LH. The second phase, follicular phase also starts on the first day of menstruation but unlike the menstruation phase it last until day 13. During this phase the hormone oestrogen is produced, which cause the uterus lining to grow, getting ready to receive a fertilized egg if you happen to get pregnant. (Menstrupedia) The hormone follicle-stimulating hormone (FSH) also stimulates the growth of the ovarian follicles. Each of the follicles contains an immature egg. Towards the end of the follicle stage only one follicle will remain active. While the egg cell matures, this stimulates the uterus starts to thicken and prepare for pregnancy. The developing follicle causes a rise in the oestrogen levels which is detected by the hypothalamus which releases the hormone gonadotrophn releasing hormone (GnRH) which prompts the pituitary gland to produce higher levels of luteinising hormone (LH) and FSH. The third phase, ovulation phase happens on day 14, is the release of a mature egg, which usually happens around two weeks before the start of menstruation. (Menstrupedia) During this phase meiosis I occurs so a secondary oocyte is formed. Meiosis I is the dividing of a cell to produce two haploid cells. The high levels of LH, within two days, triggers ovulation. The uterus lining prepares for implantation as it continues to grow andShow MoreRelatedMenstrual Cycle7395 Words   |  30 PagesCHAPTER ONE INTRODUCTION 1.0 BACKGROUND OF THE STUDY Menstrual cycle is a process experienced by every female at one point in their life cycle. In the olden days a young lady experiences her first menstruation in her late teens or early twenties. In recent times, however, some begin their menstrual cycle as early as nine years. The age at menarche (the first time a girl or a young woman menstruates) is widely considered as an important landmark in sexual maturity. However it varies widely betweenRead MoreThe And Menstrual Cycle Disturbance2149 Words   |  9 PagesHirustism and Menstrual Cycle Disturbance Due To Dietary Supplements In Punjab Ayesha Akram, Amna Shabbir, Anum Naz Government College University Faisalabad amnashabbir.160@gmail.com Abstract: The purpose of this study is to check the prevalence of hirsutism and menstrual cycle disturbances due to diet especially egg, yoghurt, milk and chicken. For this purpose 35 diseased patients and 35 normal patients are studied in different areas of PunjabRead MoreEndometriosis: Menstrual Cycle and Staff1458 Words   |  6 Pagesor around the lung or brain. Endometrial implants, while they can cause problems, are benign (Stoppler, 2011). In endometriosis, displaced endometrial tissue continues to act as it normally would: It thickens, breaks down and bleeds with each menstrual cycle. And because this displaced tissue has no way to exit your body, it becomes trapped. Surrounding tissue can become irritated, eventually developing scar tissue and adhesions, which is the abnormal tissue that binds organs together (Staff, 2010)Read MoreEffects Of Menstrual Cycle On Body Weight And Mass1990 Words   |  8 PagesIt is no secret that the menstrual cycle has significant hormonal and physiolo gical changes that can influence physical health by increasing a woman’s appetite and thus her weight. There a number of hormonal changes during the cycle, but the two generally focused on in research are estrogen and progesterone (1,8,12). Most research to date has examined how the menstrual cycle, specifically hormones levels at different stages within the cycle, influence appetite and eating behaviors such as food intakeRead MoreA Flow of Meaning: The Symbolism of the Menstrual Cycle in ZZ Packer’s â€Å"Every Tongue Shall Confess†1745 Words   |  7 PagesBaldwin ï ¿ ½ PAGE * MERGEFORMAT ï ¿ ½1ï ¿ ½ Helena Baldwin Ms. ONeal English 1102 10 October 2011 A Flow of Meaning: The Symbolism of the Menstrual Cycle in ZZ Packers Every Tongue Shall Confess The menstrual cycle has long been considered a symbol of many different things in cultures around the world: in many African cultures, for example, it is recognized as the link to the passing on of life and as such is celebrated by many African women, and in many Judeo-Christian cultures it symbolizes uncleanlinessRead MoreFemale Athletes And The Female Athlete, By Irene Lambrinoudaki And Dimitra Papadimitriou1063 Words   |  5 Pagesharming themselves more by being an athlete and training hard each day. This slowly depletes the bone mass in your body, eventually making one weaker ( ). Menstrual cycles in women are necessary to have proper bone health, involving estrogen. If one is delayed in getting their menstrual cycle or any type of disturbance with their cycle, they are at risk for BMD. This is both nonathletes and athletes, however more common in athletes. This occurs do to the low amount of estrogen a women might haveRead MoreThe First Time A Girl1380 Words   |  6 Pageswhen you get your period, also known as menstruation, your body sheds the lining of the uterus. The menstrual blood flows through the cervix and out of the body through the vagina. A typical period lasts anywhere from 3 to 7 days. Here are some important things to know about your periods, for both young women just learning about menstruation and those who are experiencing changes in their typical cycle. ï ¿ ¼ Why You Get Your Periods Every month, an egg begins to grow in one of your ovaries. AfterRead MoreFor Many People (Both Male And Female), The Whole Idea901 Words   |  4 Pagessystem in both male and females. In females, breasts develop, hair grows under the arms and pubic area and menstruation begins (King Regan, 2014). Once ovulation and menstruation starts the female can become pregnant. Inquiring about one’s menstrual cycle can help to the counselor and client decipher some problems the client may be having. Some girls, according to King et al., (2014), have symptoms of premenstrual syndrome that cause emotional and/or physical issues 3 to 14 days before menses beginsRead MoreBenefits of Triphasic Contraceptives1503 Words   |  7 Pagesregimen has allowed further reductions in total monthly hormone exposure and more closely mimics the dynamic hormonal picture of the female menstrual cycle. During its conception, scientists hypothesised that such physiologically appropriate lower doses would a fford triphasic COC’s fewer side-effects, whilst maintaining contraceptive efficacy and satisfactory cycle control [7-8]. Of the currently available multiphasic agents, triphasic COCs have almost replaced biphasic COC’s and contain up to 40% lowerRead MoreWhy The Bathroom Is A Basic Necessity1241 Words   |  5 Pages(Black and Fawcett 9). One in five girls drop out of school when their periods begin, and those who don’t usually miss five days of school every month (Khan and Gokhale). The main concern the girls face is the inability to properly control their menstrual cycle because of the unavailability of feminine hygiene products. In India, only 12% of 355 million women can afford sanitary pads or tampons for menstruation (Khan and Gokhale). Those who cannot afford sanitary products, â€Å"†¦ rely on old fabric, husks

Grade 12 Bio †Enzyme Lab Free Essays

Enzyme Lab Purpose: To compare the action of the enzyme catalase, to a non-protein catalyst under different conditions. Observations: | |Observations |Rate of Reaction |Interpretations | |A |Sand |- Sand piled up at the bottom of |0 |- There is no reaction between sand and| | | |the test tube and no bubbles | |hydrogen peroxide, because sand does | | | |arose | |not contain any catalysts or enzymes to| | | | | |break down hydrogen peroxide | | |MnO2 |- Reaction occurred right away, |5 |- MnO2 acts like a catalyst which | | | |bubbles rose almost to the top of| |breaks down H2O2 into water and oxygen | | | |the tube | |gas with a lower activation energy | |B |Liver |- Reaction occurred right away, |4 |- Liver contains large amounts of the | | | |and big, white bubbles rose the | |enzyme catalase, which break down H2O2. | | | |top of the test tube | |This made the reaction occur quickly | | | | | |and form bubbles. We will write a custom essay sample on Grade 12 Bio – Enzyme Lab or any similar topic only for you Order Now | | |Potato |- Very little bubbles appeared |2 |- The reaction was very moderate and | | | |from the reaction, and did not | |did ot occur quickly because potato | | | |rise very high in the tube or | |does not have a lot of the enzyme | | | |occur quickly | |catalase | |C |Used liver + Fresh liver |- Some bubbles formed and the |3 |- The reaction should have had a higher| | | |reaction was moderate | |rate of reaction, because the enzymes | | | | | |in the used liver are still active and | | | | | |can be used in the reaction again. The | | | | | |fresh liver can also perform this | | | | | |reaction with its catalase enzyme. Due | | | | | |to an error or impurity of equipment, | | | | | |the reaction was not as strong. | |Used liver + H2O2 |- Reaction occurred quickly and a|4 |- The enzyme in the liver is still | | | |lot of big bubbles formed and | |active and can be used over again, | | | |rose to the top of the test tube | |because enzymes never get used up | |D |Crushed Liver |-Reaction happened immediately, |5 |- Liver contains a large amount of | | | |and a lot of bubbling occurred | |catalase enzyme, which breaks down H2O2| | | |for a while with large, white | |very quickly. Since the liver is | | | |bubbles, and rose to the top of | |crushed, this reaction occurred even | | | |the test tube | |faster because there is a larger | | | | | |surface area of the liver for the H2O2 | | | | | |to react with. | |Crushed Potato |- Very few bubbles that were |3 |- Since the potato is crushed, there is| | | |small formed and they did not | |more surface area for the H2O2 to react| | | |rise very high in the test tube | |with, but potato does not contain any | | | | | |enzymes to break down H2O2, so this | | | | | |reaction was moderate and did not occur| | | | | |quickly. |E |Boiled Liver | – No bubbles rose to the top of |1 |- No reaction and bubbles formed, | | | |the test tube, and a light, white| |because the boiling of the liver caused| | | |cover formed on top of the liver | |denaturing of the proteins, and | | | |with very little, small bubbles | |denatured catalase proteins can not | | | | | |function | | |Liver at 37( C |- Reaction occurred quickly and |5 |- This reaction occurred and formed | | | |large, white bubbles formed and | |large bubbles that rose to the top | | | |elevated up the test tube | |because the liver is 37( C, which is | | | | | |normal human body temperature.Catalase| | | | | |operates and breaks down H2O2 best at | | | | | |this temperature. | | |Liver at 0( C |- No bubbles formed or rose to |0 |- No reaction occurred when the liver | | | |the top of the test tube. No | |was at 0(C because this condition is | | | |reaction occurred. | |too cold for the catalase enzymes to | | | | | |function.Enzyme activity slows down at| | | | | |any temperature below 37( C, and it is | | | | | |the slowest at 0 degrees. Almost no | | | | | |enzyme activity occurs. | Questions: 1. The differences in the rates were mainly because of the different temperatures of the liver, the different particle sizes of the liver and potato, and the product used with H2O2 in the reaction. The reactions that had the fastest rates had liver as the product used in the reaction with hydrogen peroxide.Also, reactions that had liver at normal body temperature (37( C), and had a larger particle size for larger surface area had fast rates of reaction. 2. H2O2 breaks down when other catalysts that can be oxidized by it are present. Because H2O2 is an unstable molecule, some inorganic substances like MnO2 can be oxidized by it, and they release oxygen gas in the reaction. 3. Temperature affects the rate of enzyme action very much. At low temperatures, the enzyme activity is very slow, because the molecules have low kinetic energy and fewer collisions occur between them. This is proven in part E of the lab, where there was no reaction and enzyme activity when the liver was 0( C.At high temperatures, the enzyme activity increases because the molecules have higher kinetic energy and more collisions occur. However, the maximum temperature the enzyme will stay active until is about 40( C. After the temperature reaches higher than 40( C, the protein enzyme will start to denature and slow down. Particle size also affects the rate of enzyme action. Smaller particles allow the rate of enzyme activity to be very high, because there is a larger surface area for the enzyme to react with and break down. This is proven in part D of the lab, where there was a very fast and active reaction with crushed liver and hydrogen peroxide. The large surface area of the crushed liver allows more space for the enzymes to work on and break down hydrogen peroxide. 4.No, the results would not be different if dog liver was used for this investigation. This is because the catalase enzyme will stay active as the temperature increases, up to about 40( C. If the liver is higher than 40 degrees, the enzyme will denature and not work. Since dog liver is exactly 40( C, the results will be the same, because the enzyme will work at a temperature of 40( C, but not any higher. In conclusion, this lab helped consolidate the understanding of how enzymes work, and how temperature and particle size affects the rate of enzyme activity. This activity was an interactive way to see how the enzymes actually function, through liver and potato. ———————– SBI 4U0-B How to cite Grade 12 Bio – Enzyme Lab, Papers

Scarlet Fever Essays - Pediatrics, RTT, Streptococcal Infections

Scarlet Fever A disease caused by an infection with group A B-hemolytic streptococcal bacteria that occurs in a small percentage of people with strep throat. When we hear the words "Scarlet Fever" we often tend to think of a deadly disease that doctors have no cure from. But it is quite the contrary, scarlet fever is just a serious case of strep throat and the medication prescribed by doctors, cures within days. But the symptoms unfortunately are not very pleasant and having Scarlet Fever is not just a walk in the park. After reading up on the disease hopefully the importance of prevention and symptoms will be understood and no more cases of Scarlet Fever will creep up. Scarlet fever was once a common, that usually affects children between the ages of two and ten, disease but now is easily treatable. The organism usuallly enters the body through the mouth or nose. It is generally transmitted from person to person by direct contact. That is, from the sprays of a sneeze from an infected person, or by any indirect contact through door handles previously touched by an infected person. The bacteria produces a toxin that causes a rash that initially appears on the neck and chest, then spreads over the body. The rash of scarlet fever usually begins like a bad sunburn with tiny bumps (papules), and it may itch. The rash usually appears on the second day of a Group A streptococcal throat infection, and the incubation period for Group A strep throat is usually 2-7 days after exposure. Typically the rash begins as small red macules which gradually become elevated. The rash usually appears first on the neck and face, often leaving a clear unaffected area around the mouth. It spreads to the chest and back, then to the rest of the body. In body creases, especially around the underarms and elbows, the rash forms classic red streaks called Pastia's lines. Areas of rash usually blanch (turn white) when you press on them. By the sixth day of a strep infection the rash usually fades, but the affected skin may begin to peel. As the rash fades, peeling (desquamation) may occur around the finger tips, toes, and groin area. This peeling may last up to ten days. Risk factors are strep throat infection, although less than 50% of the patient's who develop scarlet fever have a history of a sore throat. Not all streptococci produce this toxin and not all persons are sensitive to it. Two children in the same family may both have strep infections, but one (who is sensitive to the toxin) may have the rash of scarlet fever and the other may not. Prevention is the early treatment of strep throat. Bacteria are spread by direct contact with infected persons or by droplets exhaled by an infected person. Avoid contact with infected persons. In everyday life, there is no perfect way to avoid the strep infections that cause scarlet fever. At home, when someone is sick with a strep throat, it's always safest to keep drinking glasses and eating utensils separate from those of other family members, and to wash these items thoroughly in very hot soapy water. Use antibacterial soap if possible. Wash your own hands frequently as you care for a child with a strep infection. Symptoms sore throat fever Vomiting Loss of appetite rash on neck and chest small red macules that become elevated fading in about 3 days to leave a rough "sandpaper" feel to the skin peeling (desquamation) of the finger tips, toes, and groin swollen, red tongue (strawberry tongue) Pastia's lines (bright red colour in the underarm and groin creases) Chills Tonsils swell and form a white coating headache generalized discomfort From two to three days after the first appearance of symptoms, red spots may appear on the palate; bright red papilla emerge on the tongue, giving it the well known description of strawberry tongue. A characteristic skin eruption appears on the chest and usually spreads all over the body except the face. This rash fades on pressure. The fever can run as 40 to 40.6 degrees Celsius (104 to 105 F) generally lasts only a few days but has the ability to remain for a week. The rash fades within a week or so, and at that time the skin begins to peel. Estimates are that in a home where someone already has a strep throat infection, about one out of every four family members will get it too. There are also cases where persons,

Chris Bermans Biography

Chris Bermans Biography Introduction Born on October in the year 1955 Chris Berman became a famous sport-caster in America and perhaps that could be the reason they decided to nickname him ‘Boomer’. How Mr. Berman choose his career in the line of TV production is still not clear considering the fact that he had studied and graduated with a degree in history from Brown University.Advertising We will write a custom term paper sample on Chris Bermans Biography specifically for you for only $16.05 $11/page Learn More The most notable part of his career life in TV production is his work at ESPN. Although he had studied history in the university, Berman proved that he could also excel in sports broadcasting. After playing in all major Baseball, leagues Derek Jeter can be termed as a legend of the game. Although his case was easy to understand unlike Berman’s case, â€Å"the love for the game† must have been his driving force. The rise of sport shows In the earl y stages of his career, Chris Berman joined ESPN, becoming a very popular broadcaster, and the conclusion is that he was more than a broadcaster who rose up to be a star. Before Chris Bermans era, sport on TV was just for the sake of passing the good or the bad news to the fans (Hatch, 2010). In fact, it is evident that watching sports on TV at that time was not much different from reading a newspaper article on the same. Thanks to Mr. Berman, sport broadcast on TV had to take a new dimension and it has never been the same again. If making the broadcasting lively and full of emotions was to get a copyright then the person to receive this is no other that Chris Berman. TV programs and hosts come and go and as soon as they are off air, their memories on viewer’s mind fade away. This however is very different with Chris Berman and all the shows that he hosted all the way from the ‘sport centre’, ‘Baseball Tonight’ to the most watched ‘Post game sh ow’. In all shows Berman had a way of connecting with the audience because he produced exactly what his viewers expected. His nickname however, has a relationship to the shows that he hosted. In all these shows fun and laughs can be the best words to describe them. Initially, watching sport programs on the television was a serious business and it was not for the purpose of any entertainment. The conclusion is that Chris Berman introduced entertainment in television sport shows. Berman influenced the production of programs that attracted the attention of the viewer (Porter, 1995). Sport shows had been on TV for long enough but most of the times their effect on the viewers passed on unnoticed. This means that the shows did not have an established fan base but after Chris Berman’s shows in ESPN this had to change and these shows started to attract fans.Advertising Looking for term paper on biography? Let's see if we can help you! Get your first paper with 15% OFF Learn More As stated by Bender and Steele (2007) â€Å"sometimes TV and sports radio shows have a religious effect on fans. For example, there are many great sports personalities, such as Chris Berman (ESPN) and Dan Patrick (ESPN) whom many sport fans watch consistently.† This is similar to the case of Derek in Baseball game. Berman and the fans The audience or the viewer in the case of Berman is the most important element in any broadcast. Realizing this fact is very important to any TV or radio personality and Berman had his facts right, and in all the shows that he hosted it was all about the viewers. Initially, the TV sport shows broadcasted on television had little concern about the viewer or the fan. In fact, most of them had had a design with the sole purpose of taking the message home. The conclusion is that the fundamental objective of Berman in all his shows was to make or give the fans the opportunity to celebrate what he loved most and that is spor ts. As claimed by Smith and Hollihan (2009) Berman had a personal connection with his viewers in all the shows that he hosted. Berman and Cable TV A cable TV that broadcasted sports 24 hours, seven day a week was a thing that could not be imagined before ESPN and of course Berman. From its humble beginning, ESPN had risen and become one of the most successful sports broadcasting station in the world and attribution of most of this success was to Chris Berman. As Porter (1995) continues to claim, â€Å"Berman’s style suited well in developing of cable TV.† Therefore, Chris Berman contributed to the rise of cable TV similar to Derek in the rise of baseball. Conclusion Chris Berman having received his university education in the field of history ended up developing a career in broadcasting which was a success. Throughout his career, Berman brought a new face in broadcasting of sports on the TV. Before Berman was on TV, the main aim of sport broadcasting was to pass the me ssage. Chris Berman introduced the entertainment in sports broadcasting and he actually proved that the viewer is the most important element in the whole business of broadcasting. He also led to the development of anchors who were viewer minded and finally he contributed to the rise of cable TV. References Bender, C., Steele, J. (2007) Sports fan 101: Score The balance in your relationship. Bloomington: Author House Ltd.Advertising We will write a custom term paper sample on Chris Bermans Biography specifically for you for only $16.05 $11/page Learn More Hatch, L. (2010, April 20). The incredible Career of ESPN Anchor Chris Berman. Business Insider. Porter, D. (1995) Biographical dictionary of American sports: 1992-1995 supplement for baseball, football, basketball, and other sports. Westport: Greenwood Publishing Group, Inc. Smith, A., Hollihan, K. (2009) ESPN: The Company: The story and lessons behind the most fanatical brand in sports. New Jersey: Wiley sons, Inc.

Little Boy Atomic Bomb in World War II

Little Boy Atomic Bomb in World War II Little Boy was the first atomic bomb used against Japan in World War II and was detonated over Hiroshima on August 6, 1945. The design was the work of a team led by Lieutenant Commander Francis Birch at the Los Alamos Laboratory. A gun-type fission weapon, the Little Boy design utilized uranium-235 to create its nuclear reaction. Delivered to Tinian in the Marianas, the first Little Boy was carried to its target by the B-29 Superfortresses Enola Gay flown by Colonel Paul W. Tibbets, Jr. of the 509th Composite Group. The Little Boy design was briefly retained in the years after World War II but was quickly eclipsed by newer weapons. The Manhattan Project Overseen by Major General Leslie Groves and scientist Robert Oppenheimer, the Manhattan Project was the name given to the United States efforts to build nuclear weapons during World War II. The first approach pursued by the project was the use of enriched uranium to create a weapon, as this material was known to be fissionable. To meet the projects needs, enriched uranium production began at a new facility in Oak Ridge, TN in early 1943. Around the same time, scientists began experimenting with various bomb prototypes at the Los Alamos Design Laboratory in New Mexico. Uranium Designs Early work focused on gun-type designs which fired one piece of uranium into another to create a nuclear chain reaction. While this approach proved promising for uranium-based bombs, it was less so for those utilizing plutonium. As a result, the scientists at Los Alamos began developing an implosion design for a plutonium-based bomb as this material was relatively more plentiful. By July 1944, the bulk of the research was focused on the plutonium designs and the uranium gun-type bomb was less of a priority. Leading the design team for the gun-type weapon, Lieutenant Commander Francis Birch succeeded in convincing his superiors that the design was worth pursuing if only as a back-up in case the plutonium bomb design failed. Pushing forward, Birchs team produced specifications for the bomb design in February 1945. Moving into production, the weapon, minus its uranium payload, was completed in early May. Dubbed the Mark I (Model 1850) and code-named Little Boy, the bombs uranium was not available until July. The final design measured 10 feet long and 28 inches in diameter. Little Boy Design A gun-type nuclear weapon, Little Boy relied on one mass of uranium-235 hitting another to create a nuclear reaction. As a result, the core component of the bomb was a smoothbore gun barrel through which the uranium projectile would be fired. The final design specified the use of 64 kilograms of uranium-235. Approximately 60% of this was formed into the projectile, which was a cylinder with a four-inch hole through the middle. The remaining 40% comprised the target which was a solid spike measuring seven inches long with a diameter of four inches. Commander A. Francis Birch (left) assembles the bomb while physicist Norman Ramsey watches. Public Domain When detonated, the projectile would be propelled down the barrel by a tungsten carbide and steel plug and would create a super-critical mass of uranium at impact. This mass was to be contained by a tungsten carbide and steel tamper and neutron reflector. Due to a lack of uranium-235, no full-scale test of the design occurred prior to the bombs construction. Also, due to its relatively simplistic design, Birchs team felt that only smaller-scale, laboratory tests were necessary to prove the concept. Though a design that virtually ensured success, Little Boy was relatively unsafe by modern standards, as several scenarios, such as a crash or electrical short circuit, could lead to a fizzle or accidental detonation. For detonation, Little Boy employed a three-stage fuse system which ensured that the bomber could escape and that it would explode at a preset altitude. This system employed a timer, barometric stage, and a set of doubly-redundant radar altimeters. "Little Boy" Atomic Bomb Type: Nuclear weaponNation: United StatesDesigner: Los Alamos LabratoryLength: 10 feetWeight: 9,700 poundsDiameter: 28 inchesFilling: Uranium-235Yield: 15 kilotons of TNT Delivery Use On July 14, several completed bomb units and the uranium projectile were shipped by train from Los Alamos to San Francisco. Here they were embarked aboard the cruiser USS Indianapolis. Steaming at high speed, the cruiser delivered the bomb components to Tinian on July 26. That same day, the uranium target was flown to the island in three C-54 Skymasters from the 509th Composite Group. With all of the pieces on hand, bomb unit L11 was chosen and Little Boy assembled. Due to the danger of handling the bomb, the weaponeer assigned to it, Captain William S. Parsons, made the decision to delay inserting the cordite bags into the gun mechanism until the bomb was airborne. With the decision to use the weapon against the Japanese, Hiroshima was selected as the target and Little Boy was loaded aboard the B-29 Superfortress Enola Gay. Commanded by Colonel Paul Tibbets, Enola Gay took off on August 6 and rendezvoused with two additional B-29s, which had been loaded with instrumentation and photographic equipment, over Iwo Jima. Boeing B-29 Superfortress Enola Gay landing after the atomic bombing mission on Hiroshima, Japan, 1945. U.S. Air Force Proceeding to Hiroshima, Enola Gay released Little Boy over the city at 8:15 AM. Falling for fifty-seven seconds, it detonated at the predetermined height of 1,900 feet with a blast equivalent to about 13-15 kilotons of TNT. Creating an area of complete devastation approximately two miles in diameter, the bomb, with its resulting shock wave and firestorm, effectively destroyed around 4.7 square miles of the city, killing 70,000-80,000 and injuring another 70,000. The first nuclear weapon used in wartime, it was quickly followed three days later by the use of Fat Man, a plutonium bomb, on Nagasaki. Postwar As it was not expected that the Little Boy design would be used again, many of the plans for the weapon were destroyed. This caused a problem in 1946 when a shortage of plutonium for new weapons led to the need to construct several uranium-based bombs as a stopgap. This resulted in a successful effort to recreate the original design and produced six assemblies. In 1947, the U.S. Navy Bureau of Ordnance built 25 Little Boy assemblies though by the following year there was only enough fissionable material to arm ten. The last of the Little Boy units were removed from the inventory in January 1951.

Open Ended, Must Be Related to Deserts Research Paper

Open Ended, Must Be Related to Deserts - Research Paper Example Though the Death Valley reaches 134Â °F, under fair weather the Mojave Desert appears to boast off its sparing potential to allow some two hundred indigenous species of plant to thrive upon its creamy vastness, alluding that somewhere, somehow, beauty and hope toward conducive livelihood still exist. With salt flats and metal deposits, one essentially wonders how this might bring industriousness out of probable inhabitants yet seeing the way history has shaped this form of land, it amply seems more rewarding to preserve the features of classical worth which the concerned multitude are aware of. Given the seldom opportunity to explore the Mojave Desert, I would definitely run into the trees and the rest of the thriving nature around, not minding how less diverse they have often been. To bask in the beating sun in the day and feel the heart of the desert in the manner by which its collective substance responds to rays and rays of energy should prove quite worthwhile. Knowing that it i s this side of the world and nature that is rarely visited by leisure or feel-good tripping moments, people must be pondering of an advantage to acquire from the contemplative scenario of the Mojave Desert by night. In my case at least, there could be anticipating a point of pure meditation, if not bliss, sitting outside a humble tent or simply holding breath to give way to a unique sensibility and connection with the sound of certain exotic creatures lurking nearby. By Sylvia Plath’s creative description of its truth, vivid and figurative alike, in the poem ‘Sleep in the Mojave Desert’, she expresses ‘I think of the lizards airing their tongues - In the crevice of an extremely small shadow – And the toad guarding his heart’s droplet – The desert is white as a blind man’s eye, Comfortless as salt. Snake and bird doze behind the old masks of fury.’ Consequently, one recognizes the desert’s wild life that is rather mo re sensitive and reserved than aggressive. It might just be in this occasion that the Mojave Desert reveals its sentimental value before it transforms to another kind of freedom at daybreak. Imagining myself lying on such a spot of expanse to experience a special respiration away from the urban community within this setting, I could picture an atmosphere filled with throbbing as if the desert possesses a spiritual force inviting a desert or every remainder of loneliness in me to join its contained solace then grasp further an understanding of its treasure or capacity for comfort and salvation despite the strangeness of immensity attached with it. The Mojave Desert is never silent though it will never communicate in terms of the human language yet it certainly speaks from the soft spot channeled through the sound, smell, and touch made by the breathing ground, the peculiar bushes, and other plants with all the living reptilian creatures in its keeping. For both events whether sunup o r sunset, it occurs that my physical presence in this desert would amount to a profound engagement with the earth in the purest of natural state, undisturbed by any trace of mankind. While the chief indicators of the desert as in the Joshua-tree and the Desert Spanish Bayonet, a narrow-leafed yucca show the Mojave Desert’s generosity in maintaining their prominence, such splendor I think is in every way a privilege to be part of especially as it radiates

Find appropriate title Essay Example | Topics and Well Written Essays - 1500 words - 1

Find appropriate title - Essay Example related to the way work was distributed, planning and organising work, types of skills possessed by employees, measuring and rewarding performance, standardization of best suitable methods of working and defining the role of each employee, group, function and/or unit. Subsequently, the Managerial Grid was proposed by Blake and Mouton (1964/1971) in which the interplay of three organisational universals, i.e. people, production and hierarchy, is studied through a grid depicting different ways how managers are concerned about production and people and their impact on each other. A transition of management perception towards human relations begun with Hawthorne studies conducted by Elton Mayo, which proved that variations in external environment impacted performance of the workers; variations in pay in the form of performance incentives motivated workers to perform better; increased social interactions that occurred between work motivated workers in turn leading to higher productivity (Dixon, 2003). These theories and others explain how different perspectives, i.e. planning and organising work, organisational structure and systems, and human relations, have an impact on effective management, contrary to my approach which has more often been authorit ative and less inclined towards human relations. The most essential requirement for effective management is ‘leadership.’ For a manager to be successful he/she should exemplify qualities of a leader; however, a person may not be in a managerial position to emerge as a leader. Hence, leadership qualities such as the ability to influence, create a vision, and ability for doing the right things help a manager to become more effective. For instance, Tripathi (2008) sums up leadership as characterized by existence of followers; involving a community of interests between leader and the followers; unequal distribution of authority; and guiding followers towards the right direction. However, management focuses on