Friday, May 8, 2020
Systemic Lupus Erythmatosus Essay example - 1364 Words
Lupus is a chronic inflammatory disease that occurs when your bodyââ¬â¢s immune system attacks your own tissues and organs. The inflammation caused by lupus can affect many body systems including the following: joints, skin, kidneys, blood cells, heart and lungs. Lupus occurs more frequently in women than in men. There are four different types of Lupus that exist. They are Systemic lupus erythematosus, Discoid lupus erythematosus, Drug-induced erythematosus, and Neonatal lupus. The most common and most serious type is Systemic lupus erythematosus. Previously the outlook for people with lupus was grim, but diagnosis and treatment of lupus has improved quite a bit. With proper treatment, most people can lead happy and active lives. Thisâ⬠¦show more contentâ⬠¦Lupus is a very complex disease that requires knowledge and awareness on the part of the doctor and good communication from the patient. There is no single test that can determine if a person has lupus. Several laboratory tests can help a doctor confirm the diagnosis of SLE or rule out other causes for the personââ¬â¢s symptoms. The ANA (antinuclear antibody) test is commonly used. This test looks for antibodies that react against the components of the nucleus of the bodyââ¬â¢s cells. The doctor can also order a biopsy of the kidneyââ¬â¢s or the skin if those body parts are affected. The doctor can also order a test for anticardiolipin antibodies. If the person is found to have these than they are at an increased risk for blood clotting and there is an increased risk of miscarriages for pregnant women. Other testing that may be done is a complete blood count, urinalysis, blood chemistries, and erythrocyte sedimentation rate test (a test that measures inflammation). In order for a doctor to diagnose you with SLE, you must have 4 out of 11 typical signs of the disease. SLE may alter the results of the following tests: Antithyroglobulin antibody, Antithyroid microsomal antib ody, Complement components (C3 and C4), Coombsââ¬â¢ test-direct, Cryoglobulins, ESR, Kidney function blood tests, Liver function blood tests and Rheumatoid factor. (Makeover, 1997) There are no two cases of SLE that are like. Symptoms may come on suddenly or develop slowly. The symptoms may be mildShow MoreRelated Lupus Essay1079 Words à |à 5 Pages Lupus Definition of the Disease Lupus is a chronic inflammatory disease of unknown cause that can affect virtually any part of the body. The medical term for Lupus is Systemic Lupus Erythematosus or better known as SLE. With Lupus there is a malfunction in some of the cells of the immune system. quot;In Lupus, the body overreacts to an unknown stimulus and makes to many antibodies, or proteins directed against body tissue. Thus, Lupus is called an autoimmune disease. â⬠# Myth/Reality StatementsRead MoreA Woman Doing Life : Notes From A Prison For Women1320 Words à |à 6 PagesGeorge was diagnosed with systemic lupus erythmatosus (SLE). Upon her arrival to Fluvanna George reported to the medical staff that she had SLE but it was never written on her medical profile until she had a freak accident. While in the shower George lupus symptoms attacked her and she fell and injured herself in the shower. When she was seen by the prison s doctor they did not believe she had lupus because the doctor declared that only African Americans can get lupus. George s medical case still
Wednesday, May 6, 2020
Tutorial answers Free Essays
If the system already exists, different scenarios can be tried using he model before tests being carried out on the real system. Alternatively if the system does not exist, the model can be used to help decide on the final design of a system. Often there are constraints on the design that need to be investigated e. We will write a custom essay sample on Tutorial answers or any similar topic only for you Order Now G. Constraints on cost, space, etc. Modification to systems once they exist can be expensive hence it is important to try and get design of systems ââ¬Ëright-first-timeââ¬â¢ and this is where modeling and simulation can be useful engineering tools. Example: see lecture notes weekly under section Why is modeling important ?. 2 See notes 3. Components of system Inputs Outputs States Environment Tank Valve Pipes Inlet Flows of A and B Liquid level Level change in tank Upstream of inlet to tank and downstream of outlet valve 4. See notes 5. See notes 6. Bookwork (as coursework 1) TUTORIAL ANSWERS 2 El . A proportional relationship for a component is here considered to be an unchanging relationship (and is often referred to in modeling terms as a constitutive or physical relationship). These are the natural physical laws which the individual components of the system obey e. G. For an electrical system, the relationship between voltage and current and in the special case of an ideal resistor ââ¬â Ohmââ¬â¢s Law FRR. I E. Kerchiefs Current Law : algebraic summation of all currents flowing into a junction of a network is zero. Kerchiefs Voltage Law: algebraic summation of all voltages acting around a loop of a circuit is zero. Examples ââ¬â see section 2. 2. Of lecture notes. E. The impedance of an element is its voltage:current ratio. Multiple Choice: Electrical Systems El(b) E(C) Problems: Electrical Systems El . 3. 3 0, Ohmââ¬â¢s Law is obeyed since the resistance is constant as the voltage varies Q. 40 A E. IV E. (a) 4. 4 0 (b) 16 (c) 4. 4 E. (a) 0. 68 V (b) 0. 47 V (c) 0. 34 V E. (a) 0. 2 V, 205 ma (b) 1. 03 V, 52 ma (c) 1. 16 V, 193 ma E. = 30/84 v = 0. 357*12 volts = 4. Volts E. VI = 366/191 = 1. 92 V, TUTORIAL ANSWERS 3 MI . (I) spring f = xx= k(XSL -xx) where x is the displacement (or extension) and k is the proportionality constant called the spring constant with units of force/displacement e. . N/m. Damper f = BE k(FL ââ¬â vi) where v is the velocity and B is the proportionality constant called a viscous friction coefficient or constant. Its dimension is force/velocity e. G. NSA/m. MM. See lecture notes. The force balance law demands that (a the acceleration). Analogies: This is analogous to Kerchiefs voltage law, particularly if one treats the inertia acceleration as an equivalent force. Note: In order to model a mechanical system, the usual practice is to form a free body diagram around each inertia (mass) component. One will then end up with a set of simultaneous differential equations, the solution of which dictates the dynamics and constitutes the system model. In the case where there are no mass components, then ensure a force balance at selected points in the system. That is the net force acting on any point must be zero, I. E. Multiple Choice: Mechanical Systems MI . G) MM. (a,b) Problems: Mechanical Systems MI. O. AN MM. 0. 05 arms Question/ Variable (NSA/m) 812 834 Biota I 2 1217 24/19= 1 . 263 4 15/8 60/47 = 1 . 276 Questions: Thermal and Fluid Systems TFH . A system is said to be in equilibrium when its behavior is steady I. E its output and inputs are unchanging. For the liquid level system with an inlet and outlet flow, this corresponds to the inlet and outlet flows being the same. Multiple Choice: Thermal and Fluid Systems TFH. (b) TFH. (c) Problems: Thermal and Fluid Systems TFH . The flow cannot be assumed to be laminar as the proportionality constant is not inner as the flow increases through the pipe I. E. I/R resistance (Pa. s/mm) 3 TUTORIAL ANSWERS 4 IQ . Methods that can be used to determine the gradient of the straight line at t=2 sec are: (I) plot a graph and determine where t=2 or (it) differentiate x(t) with respect to t and substitute t=2. Q. (a) Q. See lecture notes Q. Completing the table gives: Electrical Component Equation Mechanical Component Rotational Component Inductor Inertia Rotating inertia Resistor Damper Capacitor Spring Torsionââ¬â¢s spring Q. (a) Using free body diagram on the mass-damper system of Fig. 5. 1, the mass and ampere can be considered to be in parallel. Force balance gives: where: Hence: (b) Similarly for the spring-damper system of Fig. 5. 2 Force balance gives: where: , (c) For the rotational pulley of Fig. 5. 3, a torque balance is required: Torque balance gives:and where:, , Q. (a) For a resistor and capacitor in series of Fig. 6. 1 Apply Kerchiefs Voltage Law gives: (b) For a resistor and inductor in series of Fig. 6. 2 where: , , (c) For a 5 resistors and a capacitor system of Fig. 6. 3, observe that this is nearly the same system as shown in Tutorial Sheet 2 Problem E but with the addition of the opacity. Hence: where: with and Hence as in Qua. : Q. Q. Material balance on tank: rate of change of mass floodwater = mass flow in ââ¬â mass flow out assume constant density 0 and area: Given: , A = 7 mm, R = 0. 14 her/mm and Sin = 100 mm/her substituting gives: Tutorial Answers 5, 6 IQ Bookwork straight from notes: Ask in a tutorial if stuck and/or use MENTAL to generate solutions and check against you work. E. G. For 1st of these t=alliances(O,2,100); ext=subs(x,t); fugue(l reset Q: Throughout Q assume a model of the form Steady-state is 0. 6. Initial value is -1. Rise is given as 1. . 63% of rise is given by which implies x(t) has this value at about t=O. 25 sec and therefore T=O. 25, Steady-state is 30. Initial value is 2. Rise is given as 28. 63% of rise is given by 0. 63*28=17. 64 which implies x(t)=19. 64. X(t) has this value at about t=5 sec and therefore T=5, k=30. Steady-state is 50. Initial value is 20. Rise is given as 30. 63% of rise is given by 0. 63*30=18. 9 which implies x(t)=38. 9. X(t) has this value at about t=50 sec and therefore T=50, k=50. Q: Maximum current is at t=O and given as V/R: Therefore R=V/I = 5/0. 004 = mashes. Time constant is given by ARC, so T=ms implies that C=. 005/1250 = 4 micro. Q: Parameters give a time constant of cosec so after 30 sec aircraft at 95% of steady-state land speed. 1 MPH is the same as mutterer pH or (1609/3600)m/s MPH is the same as mom/s Steady-state is given as f/B. Therefore min f required is BIB [ scaled by (11. 95) to be precise]. Q: Model is Bad/dot +xx=f or (B/k) DXL/dot +x =f/k Desired time constant is about 0. Sec, therefore (B/k)=O. 8 so k=NON/m Steady-state displacement is given as (1 /k)f = 0. 04, and therefore f=AN is required. Tutorial Answers 7 1 . Find the Lovelace transform of the following signals: Students should use MENTAL to check their working here, e. G. Ray the command: 2. Use partial fractions, a lookup table and inverse Lovelace to find the underlying signals with the following transforms. Students should use MAT to check their working, e. G. 3. What is the final value for signals with the following transforms? Use the Pit but note that: (I) there is no final value if the signal is divergent which is the case for 5th (obvious from negative sign) and (it) for convergent signals, the final value must be zero if there is no integrator. Hence only 2nd and 6th have a non-zero values which must be 4 and 0. 5 respectively. 4. Which of the following transforms has the fastest settling time? What are the settling times to within 5% of steady-state? Time constants are negative inverses of poles. One can estimate time to 5% error as approximately three times slowest time constant (exact for 1st order but no strict generalization when many poles due to uncertainty about partial fractions). Time constant is the negative inverse of the pole. So pole at -0. 25 gives T=4, etc. 5. Sketch the poles and zeros of the following transforms on an Regard diagram. By marking the LAP and RAP clearly, hence determine which represent stable and unstable behavior. Students should use MENTAL to check their working for his, for example, doing 4th as follows will produce a fugue with poles marked in Y and zeros in ââ¬Ëoââ¬â¢: Systems are stable if and only if all the poles are in the LAP ââ¬â the origin is counted as being in the LAP. The positions of the zeros do not affect stability. Tutorial Answers 8 1 . The inverse Lovelace transform of a transfer function is called the ââ¬Å"impulse response functionâ⬠. If a system has an impulse response function given by g(t) t(l-sin(t)). Compute its transfer function, G(s). 2. Use Lovelace methods to solve the following ODE equations. 3. Give examples of type O, type 1 and type 2 systems. Has does this affect the expected behavior? Bookwork 4. Which of the following transforms for 1st order ODES has the highest gain? What are the gains? What are the time constants? Determine and sketch the step responses for each of these. Gains are 4, 3, 1. 5 and 1. 125 respectively. Time constants are 4, 0. 2, 1. 25, 0. 5 respectively. As these are 1st order, sketching step response follows same procedures as tutorial 5,6. Tutorial Answers 9, 10 1 . Bookwork ââ¬â read some control text books to broaden your views on the uses and potential of control. 2. This is also straight from the notes but your understanding will also be improved by some wider reading. Donââ¬â¢t Just stick to your main discipline, but look at examples from chemical, aerospace, automotive, medical, electrical, biological, etc. 3. Straightforward application of the Pit. 2nd set has an integrator and hence the offset is known to be zero. Otherwise, use formula. Confirm this with MENTAL, I. E. Plot is seen to settle at 0. 52 4. The 1st part is taken direct from the lecture slides so not repeated here. The closed-loop time constant and rise time are: Time constant +AKA), closed-loop game = AKA/(I+AKA), where A=4/5, -r=o. 2 Hence 0. 2/(1 +K/5)O. 8 which gives K 4+3. K or 0. K4 or K5. Confirm this using MENTAL, ii. Use G=TFH(4,[1 %% plot in a figure It is clear that the time closed loop pole polynomial is (s+ [1 +AKA]/T) and hence the pole is in the LAP for all positive K which implies closed-loop stability. Discussion of large K is bookwork ââ¬â read some text books. 5. This question is designed to make a student think and experiment. To meet specifications, the closed-loop is given as Clearly the steady-state gain is unity as expected so the offset requirement is met. The closed-loop poles are determined from the roots of the denominator and we want the poles to be to the left of -2. 5 ââ¬Ëe. (s+2. 5) is equivalent to (0. As+1). Both roots can be placed at 2. 5 if In the future students will recognize that lower values of K will give a slower pole and higher values of K will give rise to oscillation. 6. Standard question. Form closed-loop transfer function and find characteristic polynomial for all 3 cases. You will need to do the partial fractions for all 3 and sketch, but you can use MENTAL to check your answers. E. G form the three closed-loop transfer functions and then type feedback(GO,GO,GO) to see all 3 together. N.B.: 63 is seem 2 content. Clearly Just proportional is fastest, but gives a large offset. GIG is smooth (2 real poles) ND no offset. But poles are well spaced so this is conservative. 63 has similar response time to GIG (same slowest time constant), but has complex poles and thus oscillation. Conclusion, PI is best! Typical exam type question outline answer a) Let the internal temperature be given as T degrees. The rate of heat supplied is given as: The heat loss OHIO(T+50) Hence the temperature is given by: In steady-state we desire T=20 which implies that b) If the external temperature drops by 10 degrees, then the model becomes: which implies the new steady-state temperature will be 6 degrees! The time constant is clearly 1000 sec. Students should sketch a graph showing the temperature moving from 20 to 6 with the appropriate time constant. ) If the heat input from the passengers is increased, the model becomes In the case, the change in temperature is negligible which suggests that for this scenario the key factor is the external temperature and heaters rather than any heat coming from the passengers. D) Clearly the open-loop choice of voltage does not maintain the temperature correctly in general and so some control is needed. It is known that the correct steady-stat e can only be achieved in the presence of uncertainty if integral action is included. The steady-state error too change in desired temperature is given by because K(O) is infinite, irrespective of changes in the gain of G or disturbances such as changes in external temperature! Students should first put the equations for the model and integral control law into Lovelace transforms about the steady-state: Hence The closed-loop transfer function is given as Students should validate that the time constants are reasonable and that the closed- loop is stable! The time constants are given from the roots of the closed-loop denominator. Students should note that these are similar to the original time constant and thus satisfactory. How to cite Tutorial answers, Papers
Monday, April 27, 2020
The Crucible do we admire Hale Essay Example
The Crucible do we admire Hale Paper Reverend Hale is trying to help, and he tries to dispel the notion that the conditions of the two girls Betty and Ruth are caused by witchcraft, but fails to do so as the town is aware of what is going on. Then he eventually spills the beans and spreads fear in that the Devil is loose in Salem. In Act 2 when Hale goes to the Proctors house to privately talk to them, the stage directions say he had a drawn and slightly guilty air giving the impression that he no longer has the atmosphere and dominance around him. He gets slightly worried when a good man as proctor could not recall the 10 commandments later saying no crack in a fortress may be accounted small meaning that even small insignificant mistakes or problems cant just be ignored. As I have said, this book is based around the events over 315 years ago in Salem, Massachusetts. In act 3 the witch trials begin and this reminds us of those that occurred in 1692. They are very similar to what happens in the crucible and the characters are also similar, for example Giles Corey was pressed to death for not revealing the name of a person wanted, and this too happened in real life with the same character and also rev john hale of Beverley and Tituba the negro slave were too there in real life, as were some of the other characters. Miller has also used the characteristics of some of these characters too. Another similarity between this play and history is the House of Un-American Activities Committee (HUAC). We will write a custom essay sample on The Crucible do we admire Hale specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on The Crucible do we admire Hale specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on The Crucible do we admire Hale specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Formed in 1934, the HUAC was formed to investigate communist issues such as Nazi Propaganda and other propaganda issues as part of the United States House of Representatives. How is the crucible at all relevant to this? Well, Danforth is similar to the HUAC as he sees himself as superior to people of Salem and in the courtroom, just like how the HUAC felt about themselves, and both believe that their judgement is always the correct one. This is shown by Danforths very controlling manner in the courtroom for example this is a clear attack upon the court as he emits power and rule over John Proctor. The second similarity is that the HUAC can be easily seen as corrupted and this corruption is just like the court in the play as the courts judge Danforth wants to convict as many people as he can in Salem for his own gain. Although this isnt fair and just, this high number of convictions will make him look good and he could be promoted, noticed, moved to head judge, or something of a similar field. An example of this is when Danforth says do you know that near to four hundred are in the jails from Marblehead to Lynn, and upon my signature? Here he is being self admiring and trying to show off how good a judge he thinks he is and also shows that he is very proud that he has jailed so many people. In act 3 and 4, we realize how selfish Parris can be. At every opportunity possible, he accuses and disputes any people who may pose a threat to him and his position in the town and the church. Even in the courtroom Parris displays this sort of behaviour calling out that attacks are being made on the court and tries to create a bias feeling towards people in a negative manner. However, into act 4 Hale does the opposite and goes against the court to try and help bring justice. Now we really admire Hale and despise Parris even more. He is trying to help Proctor now as he is a truthful man and knows that proctor is innocent. He wants justice to come out of the case and wants proctor to sign the confession so that he will live. In act 4, Parris realises what he is doing is wrong, and begins to change. Like Hale, be begins to turn to the side of the accused, and wants proctor to live. However, this is no act of kindness, this change comes about as the mood of the town worsens and focuses on him. So, he is doing it for the good of himself and he realises that if Proctor was to be hung, he could lose his position as minister and even be thrown out of Salem. This makes us despise Parris further. However, if it were for the reason that he has turned to a kind and truthful man who wanted to stop it from happening we would admire him. Another thing to despise Parris is the very pathetic and selfish action at the end of act 4 before Proctor is to be hung, where Parris offers him some cider; If you desire a cup of cider, Mr Proctor, I am sure I-. He does not finish as he sees Proctor giving him an icy stare. To do this, especially when you are the man who is responsible for his hanging, is just outrageous! Parris, throughout the play, can only be described as selfish, heartless, small minded and self motivated a sort of man who no one would want to know or associate with, and especially for someone like this to be a Minister! Despisable. Rev Hale, throughout the play, has feelings for people and only wants to help and do the right thing. He knows whats right and wrong and unlike Parris, does what is right for other people and not whats best for him. A man you would want to know, a man with the true personality of a Reverend, admirable.
Thursday, March 19, 2020
Mosquito Control With Birds and Other Natural Predators
Mosquito Control With Birds and Other Natural Predators When the topic ofà mosquito control is discussed, thrown into the mix is usually a fervent argument for installing purple martin houses and bat houses. Stores that cater to bird enthusiasts often tout the purple martin houses as the best solution for keeping your yard mosquito free. Bats, which may not be the most beloved of mammals, are defended with the claim that they consume hundreds of mosquitoes per hour. The truth of the matter is that neither purple martins nor bats provide any significant measure of mosquito control. While both eat mosquitoes, the insect makes up a very tiny portion of their diets. Other animals might have an upper hand on mosquito control, particularly in the fish, other insect, and amphibian classes. Mosquito Munchies For bats and birds, mosquitoes are more like a passing snack. Multiple studies of wild bats have consistently shown that mosquitoes consist of less than 1 percent of their diet. In purple martins, the percentage of mosquitoes in their diet is slightly higher- about 3 percent, at most. The reason is simple. The payoff is small. A bird or a bat that feeds on insects must invest considerable energy in flying around and must catch the bugs in mid-air. Birds and bats are usually seeking the biggest caloric bang for their buck. Given the choice between a mosquito morsel, a hardy beetle, or a mouthful of moth, the mosquito hardly makes the top-10 list. An Efficient Mosquito Natural Predator Gambusia affinis, also known as the mosquitofish, is an American fish that is utilized by some mosquito control districts across the country as a very effective predator of mosquito larvae. As far as natural predators go, the mosquitofish is by far the most efficient natural predator of mosquitoes. The mosquitofish is a voracious predator. In certain studies, mosquitofish have been shown to consume up to 167 percent of their body weight in invertebrate prey, including mosquito larvae, per day. Mosquitofish, as well as small predatory fish such as guppies, can be quite useful in the reduction of mosquito larvae given the right conditions. Other Mosquito Consumers The closely relatedà dragonflies and damselfliesà are natural predators of mosquitoes but do not consume enough mosquitoes to cause a significant impact on the wild mosquito population. Dragonflies are often referred to as mosquito hawks for an unsubstantiated claim of being able to kill thousands of mosquitoes. One thing that does make the dragonfly a better predator than most is that, in the aquatic larval stage, one of their food sources is mosquito larvae. Dragonfly larvae can sometimes live up to six years in this stage. During this phase of life, dragonflies do the most damage to mosquito populations. Frogs, toads, and their young tadpoles are often touted as excellent for mosquito control. In reality, while they do consume their fair share, it is not enough to seriously put a dent in vast mosquito populations. When frogs and toads do consume mosquitoes, it is usually after they have transformed from tadpole to adult.
Tuesday, March 3, 2020
Tropical Rainforests Are Natures Medicine Cabinet
Tropical Rainforests Are Nature's Medicine Cabinet Tropical rainforests, which account for only seven percent of the worldââ¬â¢s total land mass, harbor as much as half of all known varieties of plants. Experts say that just a four-square-mile area of rainforest may contain as many as 1,500 different types of flowering plants and 750 species of trees, all which have evolved specialized survival mechanisms over the millennia that mankind is just starting to learn how to appropriate for its own purposes. Rainforests Are a Rich Source of Medicines Scattered pockets of native peoples around the world have known about the healing properties of rainforest plants for centuries and perhaps longer. But only since World War II has the modern world begun to take notice, and scores of drug companies today work in tandem with conservationists, native groups, and various governments to find and catalog rainforest plants for their medicinal value, and synthesize their bio-active compounds. Rainforest Plants Produce Life-Saving Medicines Some 120 prescription drugs sold worldwide today are derived directly from rainforest plants. According to the U.S. National Cancer Institute, more than twos abound. Ingredients obtained and synthesized from a now-extinct periwinkle plant found only in Madagascar (until deforestation wiped it out) have increased the chances of survival for children with leukemia from 20 percent to 80 percent. Some of the compounds in rainforest plants are also used to treat malaria, heart disease, bronchitis, hypertension, rheumatism, diabetes, muscle tension, arthritis, glaucoma, dysentery, and tuberculosis, among other health problems. Many commercially available anesthetics, enzymes, hormones, laxatives, cough mixtures, antibiotics, and antiseptics are also derived from rainforest plants and herbs. Stumbling Blocks Despite these success stories, less than one percent of the plants in the worldââ¬â¢s tropical rainforests have even been tested for their medicinal properties. Environmentalists and health care advocates alike are keen to protect the worldââ¬â¢s remaining rainforests as storehouses for the medicines of the future. Fueled by this urgency, pharmaceutical companies have entered agreements with tropical countries promising protection against exclusive bioprospection rights. Unfortunately, these agreements didnt last, and enthusiasm waned.à In some countries, bureaucracy, permits, and access became prohibitively expensive. In addition, new technologies allowed to use powerful combinatorial chemistry techniques to find active molecules without having to slog through the mud in some faraway jungle. As a result, the exploratory search for pharmaceuticals in rainforests dwindled for a while. But the technological advancements which favored synthetic, lab-developed meds are now helping botanical prospectors once again, and a few daring pharmaceutical companies are back in the jungles looking for the next big drug.à The Challenge of Preserving Valuable Rainforests But saving tropical rainforests is no easy task, as poverty-stricken native people try to eke out a living off the lands and many governments throughout the worldââ¬â¢s equatorial regions, out of economic desperation as well as greed, allow destructive cattle ranching, farming, and logging. As rainforest turns to farm, ranch and clear-cut, some 137 rainforest-dwelling species- plants and animals alike- go extinct every single day, according to noted Harvard biologist Edward O. Wilson. Conservationists worry that as rainforest species disappear, so will many possible cures for life-threatening diseases. How You Can Help Save Rainforests You can do your part to help save rainforests around the world by following and supporting the work of such organizations as Rainforest Alliance, Rainforest Action Network, Conservation International and The Nature Conservancy. EarthTalk is a regular feature of E/The Environmental Magazine. Selected EarthTalk columns are reprinted on About Environmental Issues by permission of the editors of E. Edited by Frederic Beaudry.
Saturday, February 15, 2020
Gender Segregation In The Education System Research Paper
Gender Segregation In The Education System - Research Paper Example Single-sex schooling has characterized private education for decades. However, the amendment of Title IX by the Department of Education in 2004 effectively allowed for public schools to pursue gender segregation either in entire schools or classes. In 2006, single sex schools were formally legalized and even incentives provided for public schools to transform into single sex schools instead of just providing single sex classes within coeducation schools. The advent and legalization of single sex schools was mainly as a response to concerns from certain sections of the society that coeducation was promoting gender inequity in education. Some of the main concerns include the observation that coeducation schools were responsible for education stereotypes amongst boys and girls. Some of these stereotypes inc single-section that mathematics and sciences are traditionally for males while females are proficient in hum single-sex languages. Thus, single-sex schools were muted as a way to all ow boys and girls to pursue their interests without having to face stereotypes (National Association for Single Sex Public Education, 2011). Kiselewich (2008) advocates for gender segregation in education on a separate but equal basis just as is accepted in athletics. The evidence put forward to support single-sex schools extrapolated from studies that are not directly related to single-sex education. For instance, advantages given for single-sex schooling were mainly drawn from studies on peer/role model effect. Hoxbyââ¬â¢s (2000) class size study findings indicated that classes with majority female students had better performance in certain subjects. This is only indirectly related to single-sex education, and there is no evidence that the impact on boys may be equal to that of girls. Other considerations that backed gender segregation stated that girls were likely to pursue male-dominated careers if they attended single-sex schools. The argument further stated that women in si ngle-sex colleges pursued mathematics and sciences on a much greater level than those in coeducation schools (Billger, 2006). The Counterproductive Nature of Gender Segregation in the Education System One of the explanations as to why the promotion of gender segregation in the education system is counterproductive is that it promotes the same gender stereotypes it is said to be addressing. There are several aspects through which this is seen beginning with the insistence that by proponents of single-sex schools that such a system places girls in a position to handle mathematics and sciences. By doing this and by labeling single-sex schools as facilities where girls can pursue these areas of study, the perception that such subjects are better and that girls cannot excel in them is further strengthened.Ã
Sunday, February 2, 2020
All forms of government welfare should be abolished Essay - 3
All forms of government welfare should be abolished - Essay Example Social services herein refer to healthcare, education, social welfare programs, care for elderly or aged, and, provision of necessary infrastructures to make government effective in their relation with people (Tanner, 2012). The abolition of this government welfare means relinquishing its role and allowing private entities to offer services that can respond to peoples needs. The recent trend and dominion of private enterprise and services in our society is an attempt to exculpate or exonerate governmentââ¬â¢s role in delivering quality services as its mandate to fully realize its functions in realizing the social contract with the people it ought to serve. The abolition of social services therefor means that the government, as a bureaucracy, will relinquish its functions to accord social services and welfare to its constituents. Why spend $14,848 for every poor man (Tanner, 2012)? But on the other hand, why pay for taxes if government intends to negate the foundation of its very existence? A famous social philosopher once said that a government is a government of the people, by the people and for the people. Its object and subject of being are its constituents. It is for this reason that electorates during election wanted to nominate leaders who can uphold democracy to ensure peoples participation in decision-making and those who can reform the government structure to guarantee that delivery of services are given more importance than their selfish interests as bureaucrats. People wanted to see a government that is effectively translating its goal to have a peaceful, developed and prosperous nation. Both candidates and electorates wanted to pursue an agenda where childrenââ¬â¢s education are prioritized; quality health services are delivered in remote villages and in state-owned hospitals; peopleââ¬â¢s poverty are supplemented with social programs that can help eradicate poverty; and, social
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