Social Injustices Essay Example for Free

Social Injustices Essay â€Å"It is obvious today that America has a defaulted on this promissory note insofar as her citizens of color are concerned. Instead of honoring this sacred obligation, America has given the Negro people a bad check, a check which has come back marked as â€Å"insufficient funds. † But we refuse to believe that there are insufficient funds in the great vaults of opportunity in this nation. So we have come to cash this check – a check that will give us upon demand the riches of freedom and the security of justice. – Martin Luther King Jr. In the novel Warriors Don’t Cry and the film Remember the Titans the translation of power from whites to African Americans is portrayed very clearly reflecting the time period of the late 1950’s to the early 1960’s. First, in the novel Warriors Don’t Cry, when the Little Rock Nine integrated Central High there was a mass number of white students that wanted to execute them. President Dwight D. Eisenhower tried putting a stop to this by bringing in the 101st Airborne to protect the nine students. However, his solution did not go to its full extent, Governor Faubus refused this and started taking the soldiers out of the school and replacing them with the Arkansas National Guard. When Governor Faubus did this it aroused many problems such as: the nine students were not safe at all and also when an attacker came on to one of the nine the soldiers just stood there and watched. Also there was a white boy named Link in the novel that helped Melba out. One of the things he did was on a school night he called her warning her not to sit in her assigned seat the next day because the segregationist planned something very sinister. So when she entered that class the next day she did not sit in her seat because there was peanut butter and glass in her assigned seat. Next, in the film Remember the Titans Coach Yoast had a chance to be in the hall of fame only if he lost the next football game on purpose. When the Titans came out and smashed the team in that game Coach Yoast was told that he was out of the running. So then the next day when Yoast and Coach Boone were talking, Coach Boone told him that he was a hall of famer in his books. Also when Julius was waiting outside of Gerry’s house a cop pulled up next to him and told him that he did very well in the game on the previous night. My favorite part in the film is a great example of shifting of power. Was when all the football players were not getting along at camp and Gerry and Julius bonded after a play by saying â€Å"Left side, Strong side. † This was a turning point in the movie because it showed the team that it was okay to trust a person of another color, they were a team. Another example was on the first day of school Gerry introduces his girlfriend Emma to Julius, and when Julius sticks out his hand to shake hers and she walks away in anger. However later in the season Emma comes down on the football field during a game and shakes Julius’ hand. All in all, even though today we do not have all these problems we still have them in our society but if these things would not have happened we would not be where we are today. In the book Warriors Don’t Cry and the movie Remember the Titans there are many different times when there is a shift of power such as when Julius and Gerry become best friends and when the president assigns troops to protect nine black students.

Literature Review of Body Temperature Studies

Literature Review of Body Temperature Studies Literature survey Body temperature is one of the vital signs and it is a complex clinical variable, which can be captured accurately and quantitatively analysed 1-2. According to German physician Wunderlich, the normal body temperature is defined as 37 0C and fever as 38 0C 3. A healthy, resting adult human normal core body temperature is 37 0C. However body temperature is not constant and varies among individuals throughout the day, because of individuals metabolism rate, which is directly proportional to the normal core body temperature, time of a day or part of the body in which the temperature measured at, in the early morning the body temperature is lower and in late evening it is high due to after muscular activity and food intake. Body temperature also varies at different sites. In clinical practice the rectal, oral, axillary, forehead and ear are used to measure body temperature. An oral site, which is more convenient to measure temperature is at 37 0C. Axillary site is not accurate to measure the temperature, where temperature fall at least value36.4 0C is noted from this site. Generally rectal temperature is considered to be the gold standard for core body temperature and average temperature is fall at 37.60C.Being an internal core body temperature, it is least time consuming procedure. The temperature is higher than at other sites, due to the low blood flow and high isolation of the area, giving a low heat loss16. Rectal temperature measurement is unhygienic and can pose a risk of injury to the intestinal mucosa, especially in infants and in rectal surgery. It increases physical and psychological stress and can cause embarrassment, anxiety and physical discomfort17. The tympanic is a good site for non-invasive measurement of core body temperature. Howeve r care should be exercised with the different modes of operation offered.18 When summarizing studies with able or adequately able affirmation, the ambit for articulate temperature was 33.2-38.2 0C, rectal: 34.4-37.8 0C, tympanic: 35.4-37.80C. The ambit in articulatetemperature for men and women, respectively, was 35.7-37.7and 33.2-38.1 0C, in abdominal 36.7-37.5 in tympanic 35.5-37.5 and35.7-37.5 0C1. Mackowiak et al. in 1992 recorded the body temperatures of 65 men with the average value of36.8 0C (98.2 0F).4 The thermometer is one of the most attempted and trusted clinical instruments, yet surprising surround the information which it yields. The use of thermometer in clinical medicine was started in the middle of 19th century. However its understanding and significance of temperature measurement in health and diseased condition was occurred from past twenty decades 19. Thermometer is invented in seventeenth-century, it did not reach medicine until the 1870s, it was already in veterinary use because it provided an early diagnosis of the dreaded cattle plague-as discovered 100 years earlier by a French veterinary student. On the other hand the existence of fever had been recognized since 600 B.C. For most of this time, fever was believed to be beneficial, even to absurd degrees. `If there were a physician skilful1 enough to produce a fever it would be useless to seek any other remedy against disease-according to Rufus of Ephesus in A.D. 100. By the 17OOs, however, the ability of willow bark to reduce fever became known and, as ever, once an effective drug was available, excellent use was found for it. The ability to control fever fostered the belief that it ought to be controlled, or at least that it was unhelpful, without much real evidence: `The role of fever in disease remains unexplained. Fever may eventually be shown to confer a greater advantag e to the defence mechanism of the host than to the invasive properties of the microorganism19. In 1861, Carl Wunderlich was the first German physician performed the systemic measurement of human core body temperature in healthy individuals, the average reported value was 37 0C or 98.6 degree Fahrenheit. Because of his work on temperature Wunderlich is generally regarded as the father of clinical thermometry20-21. According to Wunderlich, normal body temperature lies within a range of 97.2 0F/36.2 0C to 99.5 0F/37.5 0C. Wunderlich found that the body temperature is not constant and varies in both healthy and unhealthy individuals. He wrote, The lowest point is reached in the morning hours between two and eight, and the highest in the afternoon between four. In his investigation the body temperature rises in mental exertion, constipation and urine retention.He observed that women have slightly higher body temperature than men and among age groups; older individuals have significantly lower body temperature compare to younger individuals20. Body temperature is influenced by several factors, such as diurnal variation and cellular metabolism, due to muscle activity during the day exercise and ambient temperature 22-23. Daily body temperature is not dependent on site of measurement, which is non-linear, and characterized by moment to moment complex variability 4 .The cosinor analysis of temperature variability data is well established in circadian research of body temperature rhythms, which is described in a simple cosine wave, which is typically characterized in terms of acrophase, amplitude, and mesor, where it filtered out the complex variability data4. Under natural conditions expected timing of the nadir and acrophase , value of the mesor, and amplitude of temperature rhythm was significantly different in an individual’s temperature rhythm, which will be influenced by many endogenous countenance of the environments as well as health status4. During menstrual period, there is an increase in body temperature ranging from 0.5-1.0 ° F/0.25-0.5 ° C is typically observed at or around ovulation(ref- Circannual and menstrual rhythm characteristics in manic episodes and body temperature. in note.) . Comparison of between follicular phase and the post-ovulation luteal phase, body temperature is elevated, but the amplitude of the temperature rhythm is reduced (ref- Circadian rhythms, sleep, and the menstrual cycle. In word doc.). It has been reported that the temperature in luteal stage is 0.4 0C higher than follicular stage (26 ref- in note ). (Check original ref no. in protocol.) This is mainly because of the progesterone hormone level in luteal stage and some studies proved that rise in body temperature is due to effect of progesterone hormone whereas oestrogen has lowering effect. the temperature remain elevated in luteal phase as long as the progesterone levels are increased. ( ref-29 and 33 in note.) )(check 27-28 origina l ref ) Physical fitness varies the normal body temperature; Atkinson G et al found that the physically active groups have higher amplitude of temperature than inactive groups. However the oral temperature of physically active group had lower than inactive group at 2.00 and 6.00. Rest of the time physically active group had significantly higher oral temperature than inactive group. Age has also an important role in variability of temperature. In most of the studies reported that cosinor analysis of temperature; mesor and amplitude decreases with increase in age. Gubin et al reported that normal temperature range is higher in young adults than in elders. Mesor is higher in young adults (97.5 ° F/36.38 ° C) than in elderly subjects (97.1 ° F/36.17 ° C) and amplitude was also increased in young adults than in elderly subjects. The mean circadian acrophase was similar in both age groups (17:19 versus 16:93); however, inter-individual differences were higher in the older group, with individual values varying between 10:00 and 23:00 hours (ref.-48 in note ). In another study Howell et al recorded the oral temperature using electronic thermometer in 105 females age ranges from 61-105 years and reported a group mean of 36 0C,which is significantly lower than in a younger adults.(29 in original protocol). Touitou et al, found that the daily body temperature ampl itude was decreased in the elderly subjects when compared to healthy adult individuals.(30 in original protocol). Nonlineardynamics and complexity theory appear to offer an alternative approach. Many biological structures can be regarded as natural fractals and much physiological behaviour can be explained by deterministic chaos (heart rate, bacterial population growth, hormonal secretion pulses, and epidemics. Furthermore, in many cases, pathological conditions and ageing are known to be accompanied by losses in complexity. The complexity of the temperature curve could be regularly measured in all cases. Consistent results were obtained using three entirely independent methods that measure different aspects (in two cases the dynamic behaviour, in the other the anfractuosity of the curve), with good correlation between all methods. None of the complexity measures was significantly different for the two sexes, nor were they affected by the BMI. On the other hand, all measures of complexity were inversely correlated with age. This finding is somehow coded in the temperature readings, but classical statistical indicators are not capable of bringing it to light. The finding of an inverse correlation between age and the degree of complexity of the temperature curve was likewise not unexpected. Ageing and illness are known to be accompanied by a loss of complexity in certain patterns of chaotic behaviour12. For instance; variability in heart rate decreases with age and in certain conditions is associated with a poor prognosis31. It could be argued that, as has been postulated for heart rate, body temperature is governed by several different regulatory systems (thermogenesis, vasoconstriction- vasodilatation mechanisms, sweating, breathing rate) and at the same time is subject to external factors (ambient temperature, exercise, clothing). Perhaps illness and ageing cause a certain decoupling or isolation of the thermal regulatory system from its surroundings. This in turn could result in less complexity of the temperature plot, leading to lower ApEn and FDc values and higher DFA values12. Varela et al. reported that in healthy subjects, the temperature curve behaves like a natural fractal whose complexity may be analyzed in a consistent manner. In addition, they observed that complexity decreased significantly with age. The complexity of the temperature curve is tightly inversely correlated with the severity of the patients condition. Both mean and minimum ApEn were significantly lower in patients who died than in patients who survived. Consequently one would expect to see a reduced complexity in the temperature readings of critically ill patients, the level of complexity mirroring the patients clinical evolution. In this respect, the mean ApEn value for the patient series was significantly lower than the mean ApEn for a series of 21 healthy subjects. The inverse correlation between the ApEn values and the SOFA scores in most of thein their series was likewise consistent with that premise32. In another study of Varela et al. reported that there was good correlation between complexity results and clinical scores for each patient. Non survivors exhibited lower complexity values than survivors, so low levels of complexity in the temperature curve are poor indicators  of prognosis in patients with multiple organ failure.  The predictive ability of temperature curve complexity is similar to that of the SOFA score33. Available evidence suggested that body temperature is a complex, non-linear physiological variable and has an accepted 24 hour rhythm associated with health. Body temperature is also subject to many sources of endogenous and exogenous variation4. Temperature curve analysis may provide relevant information on the aetiology of fever thus may assist in early diagnosis of disease 12. There are few cases where rectal temperature is measured intermittently using thermometer to generate fever patterns but it is a tedious procedure and has a limited usefulness in diagnosis of certain clinical conditions such as, double quotidian fever curves in diagnosis of mixed malarial infections, visceral leishmaniasis, right-sided gonococcal endocarditis and sustained fever patterns in typhoid fever 13. Musher D M et al found that the fever pattern is not likely to be helpful in diagnosis of sustained fever in Gram-negative pneumonia or in CNS damage with possible exceptions.(new ref in fever pattern). Papaioannou et al studied temperature curve complexity using wavelet transformation in 22 patients with systemic inflammation found that there is a decrease in complexity of temperature especially more in sepsis condition. They suggested that complexity analysis of temperature signals can help in assessment of inherent thermoregulatory dynamics during systemic inflammation and also can increase discriminating value in patients with infectious versus non-infectious conditions, probably associated with severity of illness. However monitoring of 24 hour ambulatory core body temperature so far has been limited and still remains obscure. Studies have shown that core body temperature is not constant, and fluctuates in different clinical conditions and in various endogenous and exogenous factors, where variability of core body temperature patterns is noted. However assessment of 24 hour core body has not been established in detail. Thus standardization of core body temperature using spectral analysis might play a significant role in clinical practice, which would potentially help us to predict clinical outcome in the early part of fever in patients and with other associated clinical conditions.

Kangaroo Circulatory System

Kangaroo Circulatory System What are the differences and similarities between the anatomy and physiology of a cat and dog, (a placental mammal) and the anatomy and physiology of a kangaroo? Well, you are about to find out. Introductory information such as outer appearance and behavior will be discussed, such as height, hair coat, speed, and more. Also, all eight body systems: skeletal system, muscular system, nervous system, circulatory system and respiratory system, digestive system and urinary system, and reproductive system will be covered. The reproductive system is the most interesting system because the embryo does not mature in the mothers womb but in her pouch. In Australia, the only place on earth where kangaroos are found, there are no native hoofed animals. Kangaroos are tall, standing 5 to 6 feet, and alert, with long necks, and large ears that swivel, their eyes are also located on the side of their head to allow a full range of vision, and these are all characteristics of herbivores. Overall weight of kangaroos can vary from 50 to 120 pounds. The average lifespan is four to six years, however in captivity they can live for more than twenty years under the right conditions. (Infoqis Publishing Co., 2009) They are also night dwelling animals. Kangaroos live in groups, called mobs that help alert others of predators. Their heads are small with short and soft muzzles, large nostrils, and a divided upper lip. The kangaroo has a narrow but deep chest with pronounced collarbones. They are unable to move their back legs separately. (Infoqis Publishing Co., 2009) Their tail is at least as long as their body. Kangaroos have a course coat that i s very thick; it has a wooly like texture. (Infoqis Publishing Co., 2009) Male kangaroos are much larger than females (up to four times) and their fur coat is more reddish-brown, while the females coat is bluish-gray. As males age their chest becomes broader and their forelimbs become increasingly muscular. The red kangaroo can jump up to 30 feet long and reach speeds of 30 miles per hour. The smaller gray kangaroo can jump 44 feet. They cannot move backwards but their tail can act as a fifth limb. The tail supports the back end while it leans on its forelimbs, and their hind limbs are swung forward. The hind feet can be up to 14 inches in length with hairless soles, covered instead by hard calloused skin. (Marshall Cavendish Corporation, 2010) The three most abundant species are the eastern gray, the western gray and red kangaroo together number in the tens of millions. Every year millions of these species and thousands of other species are harvested. The skins are made into rugs a nd clothing and their meat (formerly used as pet food) is now sold for human consumption. (Encyclopedia Britannica, 2012) They are also very good swimmers and will get in the water in order to get away from predators when they need to. (Infoqis Publishing Co., 2009) When chased by hunters with dogs they will make for water and turn on the dog and hold it under water in order to drown it. (Encyclopedia Britannica, 2012) Kangaroos are oddly shaped animals. This is due to their skeleton. A kangaroos backbone is comprised of 49-53 vertebrae: 7 in the neck, 21-25 in the tail, and 13 dorsal. The dorsal vertebrae have long projections which allow for the large muscles of the limbs to attach. (Marshall Cavendish Corporation, 2010) The clavicle is very pronounced. The humerus is about half the length of the radius and ulna. The lumbar vertebrae are extremely large to allow support for the jumping movement of the kangaroo. The pelvis has two processes called the epipubic bones, which is present in both sexes. These bones help support the pouch in females, but have no purpose in males. These bones evolved from reptiles and were lost in placental mammals during evolution. The hind limbs have very pronounced Achilles tendons that store energy for when the animal hops. The femur is much shorter than the tibia, fibula, and metatarsals. This creates the great length of the legs and allows for the long distance jumps. The fourth and fifth toes on the kangaroos hind limbs bear the animals weight. The third and second toes are fused by skin and have a double claw at the tip and the first toe is absent. The hind limbs are very large to allow stabilization when standing upright and acts as a spring when it bounds, while th e forelimbs are very small and similar to a humans arm with five digits. They use the forelimbs to manipulate food. Kangaroos have no kneecaps because the ankles prevent the foot from rotating sideways. (Marshall Cavendish Corporation, 2010) The kangaroos skull is very small, delicate, and thin which, allows kangaroos to be killed easily by a blow to the head. The palate is incomplete with spaces in the bones. The articulation of the jaw allows sideways movement for grinding, and opening and shutting movements for biting and munching. Kangaroos have three pairs of incisor teeth in the upper jaw and one pair in the lower jaw. The lower and upper teeth do not line up which allows the front teeth to escape wear and tear when the animal grinds its teeth. But, if their teeth do get worn down over time, their bodies are designed to handle it. If the tooth is ground down it will fall out and new teeth that grow in the back of the mouth will move forward into the empty spaces. (Infoqis Publishing Co., 2009) Thus, an old kangaroo may only have two molars in place after the others have been shed. (Encyclopedia Britannica, 2012) The front teeth are separated by the molars by a gap called the diastema. The canine teeth are only hous ed in the upper jaw. (Marshall Cavendish Corporation, 2010) The requirement for the kangaroo to jump creates powerful hind limb muscles and very strong elastic tendons. Kangaroos have 23 muscles in the proximal hind limb. The biceps femoris is a large muscle lying in the caudo-lateral part of the thigh. The caudofemoralis is a large muscle lying in the lateral aspect of the hip. The abductor cruris caudalis is a small muscle lying in the caudal part of the thigh. The semitendinosus is a muscle lying in the caudal part of the thigh and extending from the ischium to the medial surface of the crus. The semimembranosus is a muscle lying in the caudo-medial part of the thigh between the adductor and semitendinosus muscles. The adductor is a large triangular muscle lying in the caudo-medial part of the thigh. The quadrates femoris is a deep tendinous muscle extending from the ischium to the femur. The pectineus is a small muscle in the medial part of the thigh lying between the quadriceps femoris and adductor muscles. The gracilis is a superficial muscle lying in the caudo-medial part of the thigh. The vastus lateralis is a powerful muscle lying in the cranio-lateral part of the thigh. The rectus femoris is a deep muscle lying in the cranial part of the thigh. The vastus intermedius is a deep muscle lying in the cranial part of the thigh adjacent to the femur. The vastus medialis is a superficial muscle lying in the medial part of the thigh between mm. pectineus and tensor fasciae latae. The sartorius is a muscle lying in the cranio-medial part of the thigh extending from tuber coxae to the stifle joint. The gluteus superficialis is a muscle extending from the tuber coxae to the greater trochanter of the femur. The gluteus medius is a large muscle lying in the lateral part of the hip. The gluteus profundus is a deep muscle of the hip lying on the dorsal surface of the body of the ilium. The tensor fasciae latae is a small superficial muscle lying in the cranio-medial part of the thigh. The piriformis is a small muscle lying d eep to the caudofemoralis extending from the proximal caudal vertebrae to the femur. The obturatorius externus is a deep muscle of the hip lying in the ventral surface of the pelvis. The gemelli are two small muscles lying in the space between the proximal caudal surface of the femur and the ischium. The obturatorius internus is a small thin muscle lying on the dorsal surface of the ischium just caudal to the obturator foramen. The iliopsoas is a muscle lying ventral to the caudal lumbar vertebrae and the shaft of the ilium). (Hopwood Butterfield, 1976) They also have a long muscular tail that acts as a counterbalance when bounding and a stabilizer when feeding. The tail can support the entire animals body weight. The tail also is supported by numerous tendons that connect to the pelvis. The reason cats for example cannot use their muscles for jumping as efficiently as a kangaroo, is because their forelimbs touch the ground. Every time their front feet touch the ground they act as brakes. The tail acts as a counterbalance to allow the kangaroo from landing on its face. Hoping uses a lot of energy but, once they get going the movement becomes self-sustaining. The tendons of the animals legs and tail act like springs in a pogo stick. Considering this, they can easily outrun any predator so; they are able to live in the open environment. The muscles in the thighs and tail are not only used for hoping, they are also used for fighting in males and protection for females and their young. When males fight they will lock their forelimbs and wrestle. Each tries to unbalance the other then uses its tail to balance so its hind legs can lash forward and land a punishing double blow. (Marshall Cavendish Corporation, 2010) Kangaroos have a small brain relative to their body size. On average the brain is 2 or 3 inches long and weighs 2 ounces, thus representing only about 0.1 percent of the animals body weight. The two cerebral hemispheres are much smaller than those of a placental mammal of the same size. Kangaroos lack a corpus callosum. This is the brain tissue that, in placental mammals, links the two hemispheres of the brain. Instead kangaroos have a fasciculus aberrans. Considering kangaroos leave the womb and continue development in the pouch they need to develop rudimentary senses early. These senses are smell and gravity, so that it can climb into the pouch. Adult kangaroos have good eyesight and night vision. Scent is also pronounced in kangaroos and males have a scent gland on their chest that leaks into the fur. The odor is very nasty to humans; therefore, they are sometimes nicknamed stinkers. (Infoqis Publishing Co., 2009) Kangaroos are normally silent animals, but sometime will give a sho rt, harsh bark when angry or alarmed. Females make clucking sounds to call their joeys to their sides. Also most kangaroos will use an urgent drumming or thumping of their hind feet on the ground to signal danger. (Marshall Cavendish Corporation, 2010) The circulatory system and respiratory system of kangaroos is very similar to placental mammals systems. A kangaroos heart is about the size of a humans heart. They have a closed system with arteries running away from the heart and veins running to the heart. The blood receives oxygen from the lungs and transports it throughout the body by red blood cells. Differences from other mammals are the absence of the interventricular sulcus, the great development of the auricles, the plentiful trabecula carneae, and the origin and distribution of the arterial irrigation and venous irrigation which have intramyocardiac localization. (Lima, Mendez, and Perez, 2009) Kangaroos tend to avoid sweating in the arid Australian heat because it could create problems such as dehydration. They only sweat when they are hoping because, when they are moving, the air passes over the body as an effective way to dissipate the heat generated by exercise. Therefore, when they are not hoping around they find oth er means to cool off such as wallowing in pools, lying in the shade, and coming out to feed in the dark. Also, the peripheral circulatory system helps dissipate heat. The skin of the forearms is well supplied with blood vessels and the kangaroo will lick them and cover them in moist saliva which speeds up the rate of heat loss. Kangaroos will also pant like a dog. By breathing fast they keep a flow of air moving down the moist lining of the windpipe and lungs. Air that becomes saturated with water in the throat and lungs is continuously exchanged for new dry air which maximized the rate of evaporation thus the rate of cooling. The temperature of kangaroos is just slightly lower than that of placental mammals. This is thought to be because at running at a lower temperature they use less energy and is better able to cope with food shortages and other hardships. (Marshall Cavendish Corporation, 2010) Kangaroos mainly eat grass, but they will also eat shrubs and even fungus. (Infoqis Publishing Co., 2009) Their ancestors were forest dwellers that mainly ate fruit, tubers, and succulent leaves. When evolution began the forest began to be replaced by shrubs and grassland. Kangaroos were the first and only large native animals that grazed, and thus flourished. Their sharp incisors allowed them to cut grass very close to the roots. (Infoqis Publishing Co., 2009) Grass is low in energy and nutrients and because of this kangaroos need to eat a lot of it to sustain themselves. Their stomachs are very large and chambered with long intestines to create a very efficient digestive system. When the stomach is full it can account for more than one-seventh of the animals body weight. On average though, kangaroos eat less than similar size herbivores such as cattle. A kangaroos digestion is far more efficient and will extract every last ounce of nutrition from the food, while a sheep or cow reli es on food becoming continuously available, processing large quantities rapidly and less thoroughly. In kangaroos the grass is ground enough to moisten it and then swallow it whole and then stored in the mid stomach where bacteria break down the cellulose. In cows, food is partially broken down in the rumen area of the stomach and is returned to the mouth for further chewing. Kangaroos take a very long time to chew their food to turn it into a fine pulp before swallowing because of the food staying in the mid stomach rather than being regurgitated like a cow. As stated above the stomach is multichambered or sacculated. Food passes slowly through the different compartments which are separated by bands of muscle that pucker the lining at different intervals. The elongated middle section acts as a fermentation chamber. Their long intestines allow time for full absorption of the nutrients. Kangaroos that feed on lush green grass do not do as well as kangaroos that feed on dry, shriveled grass. This is because fresh grass contains a lot of water which does not allow as much energy and takes up more stomach space. (Marshall Cavendish Corporation, 2010) Kangaroos do not release methane from their bodies; instead they use it for energy. (Infoqis Publishing Co., 2009) Considering the arid climate kangaroos may go weeks without water and thus will lick the dew off of the leaves and rocks and use all of the available moisture in their food. If they desperately need water they will use their feet to dig deep into the ground until they find it. (Infoqis Publishing Co., 2009) They conserve water by producing concentrated urine and produce dry hard pellets, and they avoid the need to sweat by feeding at dawn and dusk and resting in shady areas during the day. (Marshall Cavendish Corporation, 2010) Female kangaroos, called does, have two wombs and two vaginas for mating purposes. The male kangaroos, called bucks; scrotum is located in front of the penis. The young, called joeys are born as an embryo through a third, central vagina which develops when giving birth. This area is similar to a vagina in placental mammals and opens adjacent to the digestive tract in the cloaca. In most marsupials the opening closes after each litter but after the first birth in kangaroos it becomes a permanent structure. (Marshall Cavendish Corporation, 2010) While in the womb, the embryo is surrounded by a thin membrane secreted by the uterus wall similar to that of an eggshell in a reptile. Inside this membrane the embryo is nourished by its own yolk. The beginning of a placenta forms as the yolk runs out but never completely forms because the baby is born soon after, still in the embryo stage. The baby is born 30 days after conception, and the membrane and fluids are born with it and are eaten by the mother. A newborn kangaroo is less than an inch long (about the size of a lima bean) and weighing about 0.03 ounces; it has no eyes or fur and its back legs are mere buds. The only help the mother gives is to sit back on her tail to reduce the risk of the baby falling off and licking a path in her fur for the embryo to crawl into her pouch. The journey takes about three minutes of swimming through the fur with just its forelimbs. Once inside the pouch the baby is exhausted and attaches to the teat for the next six months or more. (Marshall Cavendish Corporation, 2010) The teat provides them with nourished milk from a mammary gland. Once the baby attaches to the teat it swells inside its mouth so it does not have to exert energy to hold on. The baby remains attached to the teat for weeks. Female kangaroos are equipped with four teats but a joey will only use one. The milk will change nutrients as the baby grows and develops. As the baby is allowed to leave the pouch and hop around the mother may already have another embryo inside the pouch that has its own supply of completely different milk. The milk for the embryo is very thin to allow easy digestion for their underdeveloped digestive systems. (Marshall Cavendish Corporation, 2010) Kangaroos are able to breed whenever the opportunity arises buy can also abandon the process if conditions get tough, therefore, mating will normally take place during the rainy season. This is unlike placental mammals which are committed once fertilization occurs. If food is scarce when the baby is born it may not survive and the mother has also reduced her chances of survival for no reason. By giving birth to such a small baby, kangaroos make a small initial investment. Males often cannot produce sperm during the dry season if food is scarce. (Infoqis Publishing Co., 2009) The estrus cycle of a kangaroo is two days longer than its gestation period. Unlike other mammals whose estrus cycle stops when they become pregnant, kangaroos are able to mate successfully just a day or so after giving birth. The cycle then stops only if the first baby, now in the pouch, latches onto a teat and begins to suckle. At this point hormones send the second baby, only containing 90 cells, into a state of suspended animation known as embryonic diapause. The embryo resumes development only if a change in the milk production signals that the first offspring will vacate the pouch soon. Joey number two will be born two days after its older sibling leaves the pouch for the last time and the female will soon mate again. The female wastes no time between births; and if the joey in the pouch is lost the mother has a back-up baby developing and does not need to wait to go into estrus or find a mate. (Marshall Cavendish Corporation, 2010) This is thought to be an adaption for recovering population numbers quickly after a drought. (Encyclopedia Britannica, 2012) Females can also determine the sex of her offspring. In the early years of mating she will prefer female babies but, the older she gets she will prefer male babies. Kangaroos really enjoy caring for their joeys; if one gets lost they will spend all their time searching for it and not eating. Many kangaroos will become very depressed when they get older and can no longer reproduce; during this time they will start to spend more time with younger females in the mob that have their own joeys. (Infoqis Publishing Co., 2009) Therefore, kangaroos are very unique animals. The skeletal system differences include the absence of a kneecap and first toe, the presence of epipubic bones, and their teeth fall out and can be replaced. The muscular system differences include the strong tail muscles. The nervous system differences include the lack of a corpus callosum. The circulatory and respiratory system is very similar to placental mammals such as cats and dogs. The digestive system includes a chambered stomach like a cow. The urinary system of the kangaroo conserves water by creating concentrated urine. Finally, the reproduction system differs by the baby developing in the pouch after 30 days in the womb and producing different milk concentrations for different aged joeys.

U.S. Military Aid - America Must be a Global Policeman Essay -- US Fo

U.S. Military Aid - America Must be a Global Policeman The United States military aid given to Kosovo raises many questions about the foreign affairs policy of the United States of America. Now the U.S. is sending its troops to Timor, a small island off the northern coast of Australia. The U.S. has sent marines to Australia to set up a command post for the troops that the United States will be sending to help with logistics, communications, and intelligence. Many critics believe that the U.S. should not get involved in matters that have no direct impact on the United States. But do not American’s believe that all men are entitled to life, liberty, and the pursuit of happiness? If this is true then it should be the United States duty to help those who are oppressed and suffering. The U.S. needs to be a global policeman to watch out for the humanitarian needs of ethnic groups and peoples and make sure that they are protected against oppression. The U.S. must do what is morally and ethically right, the U.S. is one of the only countri es large enough to give many forms of help and intervene when interests other than that of national security or interest are at steak. Any person who values their human dignity cannot stand by while innocent people are being killed. President Clinton believes that if we have the power to stop genocide and ethnic cleansing then we must make every effort to do so. In an article in The Washington Times, it says that this â€Å"policy would lead to a va...

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(a) Deadweight loss, or as termed in the question, ‘welfare loss’, is the loss of consumer and producer surplus as a result of inefficient market activity, including monopolistic competition. According to the Theory of the Firm, monopoly power includes a much higher barrier of entry, which further impedes competition by increasing the start-up cost, which essentially creates high product prices, compared to the firms, which hold the monopoly power of production, and have already established production. As a result there a loss of productive and allocate efficiency, thus encouraging welfare loss, by decreasing consumer surplus due to limited competition and subsequent monopoly powers, which enable profit-maximization at a small production output, creating a deadweight loss. (b) By using anti-monopoly legislation and price regulations, two different forms of government interventional policies that are utilized to offset the market inefficiency, and subsequent loss of welfare, which monopoly power encourages, governments are able to reduce monopoly power in a sector of economy. The diagram below compares monopolistic competition and perfect competition: As the diagram above illustrates, the monopolistic profit maximization lies at the average market cost, representing a large deadweight loss in the triangle formed by ATC, AR and Monopoly Output. To combat this, reducing welfare loss by increasing output and lowering prices, government intervention may prove an efficient method of solving the problem of monopoly. By legislating anti-monopolistic policies, for example lowering barriers of entry to encourage competition that was previously unsuccessful due to the monopoly-induced high barriers of entry. This would profit companie... ... directly allocates funds to purposes of increase economic development, then they unconsciously limit the growth, which the nation will experience, because the financial resources have been used for secondary purposes. This can be exemplified in several socialists economic measures, such as taxation, transfer payments, indirect taxes, excessive government expenditure, with which the government aims to improve equity and income equality, but at the cost of economic and financial growth. However, taxation and transfer payments, will reduce the utilization of scarce resources of human labour, in the sense that it might limit the individual incentive to work, when the state offers alternative ways of income. This is observed in countries with large taxations, where transfer payment represent a living for many citizens, again with reference to the Scandinavian countries.

Jamaican Creole vs Standard English Essay

As we can see, this is not the situation in Jamaican Creole. Case is always demonstrated by position. Any pronoun before the verb is the subject, and after the verb it is either the direct or indirect object. Other features to note are the lack of gender and absence of nominative and accusative case forms. Also lacking in Jamaican Creole are possessive pronouns like my, your, his, her, its, our, their. To demonstrate possession, Jamaican Creole either has the simple pronoun directly in front of a noun, (for example ‘my book’ would be ‘mi buk’), or adds the prefix fi-, (as in ‘fi-mi buk’ also meaning ‘my book’). Plural Marking Plural marking in Standard English is a hodgepodge of different forms borrowed and assimilated from many languages. The original Old English way of making plurals was either the addition of -n or -en or the changing of the vowel sound, as it is for Modern German. Those original Old English plural markers surviv e in a few Modern English words. For example child/children, man/men, ox/oxen, foot/feet. The Norman French way of making plurals was to add an -s, -es or an -x. Only the first two forms were borrowed into English at first, producing forms like hand/hands, eye/eyes, bus/buses. Recently the -x ending had been borrowed for words like bureau/bureaux, adieu/adieux, chateau/chateaux, but it is pronounced as if the x were an s. During the renaissance, Classical Latin and Classical Greek became fashionable, and although being extinct languages, they added a great deal both to the grammar and vocabulary of the English language, particularly in the fields of science and invention. Plurals produced at this period of time include datum/data, octopus/octopi, medium/media, index/indices, helix/helices, matrix/matrices. These plural forms cause the  most confusion not just to foreign speakers but also to a lot of people who speak English as their first language. Plural marking in Jamaican Creole is much more logical and easier to learn. In fact Jamaican Creole behaves like Japanese for the most part in that it does not generally mark the plural of nouns. To indicate plurality, animate nouns (and sometimes other nouns to be stressed) are followed by the suffix -dem. This produces structures such as ‘di uman-dem’ or ‘di pikni-dem’ meaning ‘the women’ and ‘the children’ respectively. Tracing roots of Jamaican CreoleThe unique vocabulary and grammar of Jamaican Creole did not just simply spring up as an easy way for plantation slaves from different tribes to talk to one another. Many words, phrases, and structures have an interesting etymology. (Etymology is a linguistic term for the history of the development of a word). In Middle English, there was a distinction between singular ‘thou’, and plural ‘you’. This distinction has been almost completely erased apart from in some North Yorkshire dialects where the singular form ‘tha’ is still used. E.g. ‘tha’s nice’ means ‘you are nice’. In some English dialects an attempt has even been made to replace the missing pronoun. In Southern States of America ‘y’all’ is used; in Scouser (a dialect found in Liverpool) ‘youse’ or is used; and a common form in London is ‘you-lot’. In Jamaican Creole, the pronoun ‘oonu’ is found and this is similar to the form it has in modern Igbo (spoken in Nigeria) which was the most likely donor language. Forms of the pronoun (such as uno, unu, unoo) can be found in widely scattered parts of Africa in the Nubian and Nilotic language families and even as far as the Negrito languages of Malaysia. The word ‘seh’ as in ‘im tel mi seh†¦Ã¢â‚¬â„¢ (he told me that†¦) has similar origins. Wo w!!! Another interesting word commonly used is ‘pikni’, meaning ‘child’. The word was borrowed originally form Portuguese ‘picaninni’. Prior to British dominance, it was used by Portuguese masters to refer to black slaves, who picked up the word and began using it to refer to their own children. In Jamaica today, despite its innocent original meaning (child), it has acquired a pejorative connotation because of its history in Jamaica. Two more interesting words that have spread across the English speaking world, but have their origins in Jamaica, are ‘buddy’ and ‘cuss’. These was a mispronunciations of ‘brother’ and ‘curse’ respectively. The first recorded use of ‘buddy’ was in 17; whereas the word ‘cuss’ is a word that has entered our vocabulary only since the  late 1940s. The difference in age of these terms shows how much influence Jamaican Creole has on the English speaking world, The word ‘buddy’ is even found in the Oxford English Dictionary and ‘cuss’ is used so much among the younger generation in particular, that it is only a matter of time before it too is added to the OED. in view of the popularity of fashionable culture and music forms that have their origin in Jamaica Jamaican Creole is likely to continue to have considerable influence of English as a global language, but should it be classed as a dialect of English or should it have official recognition as a language in its own right? Language Standardisation. There are more salient differences between Jamaican Creole and English than there are between Swedish and Norwegian, yet the latter are classed as two separate distinct languages. Swedish and Norwegian people have almost no difficulty understanding one another, whereas some Englishmen will not have a clue what a Jamaican is saying. Similar cases are Czech and Slovakian, and Punjabi and Urdu, of which the spoken form is the same but only the written form is different. Many people who have stated that saying ‘mi de a di paak’ as opposed to ‘I am in the park’, sounds childish, are completely ignorant of the fact that ‘mi/me’ is a common indigenous Niger-Kongo form of the first person pronoun. I would have been easy for early Jamaicans learning this strange alian language, to continue using ‘mi’ in that position rather than switching to ‘I’. Also the English at that time didn’t exactly have schools and colleges to te ach blacks the proper way of forming the first person singular nominative pronoun.

A Midsummer Night’s Dream: Book or Movie Essay

Personally, I prefer the original play of â€Å"A Midsummer Night’s Dream† only slightly more than the film adaption that was recreated in the late 1990’s. Not only had William Shakespeare managed to fully grasp the meaning of true love, but had also comprehended the dark times that came alongside such an influential and overpowering emotion. Although the movie had effectively and humorously portrayed the problems that were brewing amongst the fairies, workers, and lovers, it still missed the raw, poetic depth that the play embodied. Also, the film had strayed from the original story line more times than was acceptable. For example, the play was set in the 1500’s, which was long before the time of bicycles and flashlights that the movie had put as a frequent prop. Similarly, Bottom was never mentioned to have a significant other, though in the movie he was wedded. This only presents his character even more filthy and repulsive then would have been already thought with his enflamed ego and belligerent attitude, as he cheats on his wife for a woman he just met. Yet, the most significant mistake was with the little Indian boy. The plot of the play was built upon the idea of Titania surrendering the boy in her spell-induced state to her selfish husband, Oberon. In the movie, he begins with the same intentions, albeit all mention of the Indian boy is dropped after the initial confrontation and is never resolved, which is clearly illogical as it is the whole ordeal of the play since the very beginning. In conclusion, while the film had the look and undeveloped sense of what was meant to be presented, it doesn’t capture the heart as enchantingly and adeptly as the original screenplay did.