Sex difference and mathematical reasoning Essay Example for Free

Sex difference and mathematical reasoning Essay The main aim of the study was to determine whether mathematical reasoning is influence by sex of a person due to inconsiderate admission criteria that was adopted in United States for awarding scholarships to students irrespective of sex. In order to achieve this, the study selected sample population from both genders for students who were 13 years and above. The study was a result of the argument that males tend to dominate in mathematical aptitude test, which was evidenced by John Hopkins talent search in 1971 to 1979. Hence, Benbow and Stanley had to carry out this study to prove whether the argument was true and whether there was link between sex and ability to have good mathematical reasoning. Benbow and Stanley in this study investigated sex difference at the high level possible of the mathematical reasoning ability. The study was started by first identifying two groups of students who had the best mathematical reasoning from various mathematical aptitude test that they had taken. The study adopted two procedures where the first one involved identification and selection of students who took part in John Hopkins talent searches campaign from 1980 to 1982 (Benbow, Stanley, 1983). The students who were found to have the highest intellectual ability and below 13 years were given college Scholarship aptitude test, (SAT) to determine their mathematical reasoning. Consequently, the second procedure involved conducting nation-wide talent search and selecting those students who were below 13 years and were willing to take SAT. The results of this study indicated that students who were 13 years of age and below had high mathematical reasoning as evidenced by high scores in SAT, the mathematical part of the test. In addition, the results found that males scored far much high compared to females and thus support the prediction of the study that sex difference play important part in mathematical reasoning for children below 13 years. The evidence from the study indicated that those who scored 400 marks in SAT, males were more than female in the ratio of 1.51:1 and those who scored 600 marks or more the boys to girsl ration was 4.1:1, which showed that males had better mathematical reasoning compared to girls at the age of 13 (Benbow, Stanley, 1983). Consequently, nationwide talent search had the similar results with boy to girls’ ratio increasing to 12.6:1 for those that score 700 marks or more. The significance level Null distribution is the study probability distribution when null hypothesis is considered and regarded to be true. This means that null hypothesis it proved using null distributions. In this case, the alternative hypothesis is rejected. However, where the study does not support the null hypothesis, the said concludes by rejecting the null hypothesis at a given level of significance. Therefore, 0.05 significance means that the null hypothesis was rejected at 95% level of significance. The standard deviation error helps to determine the level of unbiased data and results of a given study and thus it becomes very important in any study. In this study, the standard error was important to determine the level of errors and thus improve the level of data reliability. Similarly, the confidence interval is used as the measure of reliability of the estimates obtained in the study. This helps to indentify if the data is misleading or within the significance level. References Benbow, C. P., Stanley, J. C. (1983). Sex differences in mathematical reasoning ability: More facts.  Science,  222(4627), 1029-1031. Source document

Factors that Negatively Effect Fetal Development Essay -- essays resea

Factors that Negatively Effect Fetal Development Pregnant women that smoke cigarettes on a daily basis can greatly harm their fetus. The Tobacco smoke in cigarettes greatly reduces fetal growth through the presence of nicotine, carbon monoxide, hydrogen cyanide, cadmium and various other aromatic hydrocarbons, but the two most dangerous chemicals that are found in cigarettes are nicotine and carbon monoxide. Nicotine causes the babies heart rate to speed up, reduces placental vascularisation, constricts the placental arteries, and thickens the endothelium of placental blood vessels. This creates a reduction in the placental blood flow, and further reductions in oxygen delivery. As well nicotine interferes with the ability of the placenta to feed the baby the nutrients it requires. Therefore the babies growth is slowed down. Carbon monoxide causes growing cells to be starved of oxygen, and effects the brain. This can lead to a low birth weight and higher chance of the baby dying at birth. Smoking is the single largest modifiable( ch angeable) risk factor in fetal growth retardation. Maternal smoking during pregnancy is also associated with genetic defects as well as an increased incidence of congenital malformations such as cleft palates, microcephalus, and clubfoot. Mothers who smoke one pack a day during pregnancy have an 85% increased risk of having a child with mental retardation. Mothers that smoke during their pregnancy have double the chance of having a child with behavural problems. Another one of the biggest factors that disrupts fetal growth and development is alcohol. This is a very common substance abuse of pregnant women. Everytime the pregnant mother is drinking, her fetus is also drinking. The alcohol crosses the placental barrier, and goes directly into the fetus's liver. The ethanol found in alcohol may impair the nutrient support of the fetus. Acetaldehyde, a major metabolite, crosses the placenta and is teratogenic. Since the alcohol stays in the fetus for a long time, the small liver is unable to metabolize the alcohol. The alcohol also travels through the blood stream going directly to the baby's brain, and this can damage the central nervous system. The common, severe, and hazardous side effect that happens to the fetus because of alcohol is Fetal Alcohol Syndrome. This is a very serious side effect that has lasting and sometimes ... ...e the death of the fetus. Pregnant women should distant themselves from heavy metals. such as, lead and methyl mercury which can harm the fetus. All pregnant women should be aware and cautious about contacting a disease. Some of the diseases are fatal and very hazardous to the fetus, while some only have minor effects on the fetus. Many of the diseases contacted by pregnant mothers are sexually contacted diseases. Some examples of these diseases are Aids, and Gonorrhea. There are also other non-related diseases such as, Rubella, and Toxoplasmolisis and, which can affect the fetus.   Ã‚  Ã‚  Ã‚  Ã‚  Toxoplasmolisis is a bacterial infection. This is a parasitic disease that can effect the fetus, by causing growth retardation. Another harmful disease that can affect the fetus is Rubella or otherwise called German Measles. Pregnant woman that have Rubella during the first trimester can effect the fetus and cause a syndrome of birth defects called congenital rubella syndrome. This can cause deafness, cataracts, congenital heart disease, and mental retardation. In conclusion, pregnant women should try to avoid all substances that can be potentially harmful to the fetus within them.

Thomas Hardy’s View on Time

In hardy's poems time is not constant or limited by a forward direction of time passing nor the vertical view of time. time is a landscape or location upon which we view the different vantage points and aspects of it, and consequently he has given locations the characteristics of time. The journey through locations is constant and forward moving but as in time you can access memories but revisiting them in your mind, or in hardy's sense, by revisiting the location. ou are not locked in time as you are in reality, hardy rewinds time as he chooses and sees what he saw at any period in his life but only when at the location. This comes through in â€Å"after a journey† when hardy revisits a cave and the echo from his previous visit their still remained, as if no time had passed, â€Å"and the cave just under, with a voice still so hollow that it seems to call out to me from forty years ago† Hardy's subconscious is so active that by revisiting a place, any memories from the re reawaken and occupy the scene.In the first stanza of ‘where the picnic was' we are in hardy's memory at the early stages of assumedly Emma and hardy's marriage, when the ‘fire' was still young and strong in their relationship. Hardy is describing a place they went in the summer time. towards the end of the stanza we are indicated that there has been a change and time is allowed to show what is in front of him then juxtaposition is introduced and we are rapidly in this new, dull and derelict scene but the location has not changed.The time jump shows where hardy really is in his life journey. Reminding him that can although he can see all these different vantage points of a landscape there is always on true outcome the present giving time a personality and the ability to ridicule. This relates to â€Å"after a journey† where   Time is personified â€Å"despite Time's derision† time is given a character that in a way as if to taunt Hardy for wanting so mu ch to access old layers of time . Emphasising that time has the ultimate power and control and can not be completely defied

Green Supply Chain Management - 3556 Words

Green Supply Chain Management Environment Management Project Group Members: Smruti Ranjan Dora F016 Ishan Mittal F036 Deepankar Mukherjee F037 Pratik Nandekar F040 Akash Pandey F044 Kriti Talwar F064 Contents 1. INTRODUCTION ....................................................................................................................................... 3 2. Globalization and Greening the Supply Chain: ....................................................................................... 3 3. Marks and Spencer ................................................................................................................................. 4 3.1 Background†¦show more content†¦10 Green Supply Chain Management 1. INTRODUCTION Green supply refers to the way in which innovations in supply chain management and industrial purchasing may be considered in the context of the environment. Environmental supply chain management consists of the purchasing function’s involvement in activities that include reduction, recycling, reuse and the substitution of materials. The practice of monitoring and improving environmental performance in the supply chain, integrating environmental thinking into a supply chain Management- including product design, material resourcing and selection, manufacturing processes, delivery of the final product to the consumer as well as end-of-life management of the product after its useful life. 2. Globalization and Greening the Supply Chain: Today’s Globalization increases the opportunities for buyers. As buyers increase their focus on environment improvement, which increases the supplier environmental performance. It is true for organizations that regard environmental improvement as a social goal, not just an issue cost, risk and public image. 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