A level :: Design and Technology

A level Objective The challenging task that I have finalised and undertaken for this coursework is to build and test a sensor. I decided to build a sensor, which would automatically change the speed of a fan by using a thermistor. The main objective of the experiment was to monitor and record the voltage change as the temperature changes. Specifically, as predicting that when the temperature increases the voltage would increase and thus the fan speed would increase too, thus causing a cooling effect to the environment. Data Information Thermistors are thermally sensitive resistors and have, according to type, a negative (NTC), or positive (PTC) resistance/temperature coefficient. A thermistor is a type of resistor whose resistance changes significantly when its temperature changes. A negative temperature coefficient thermistor has a resistance that decreases with increase of temperature. This is the most common type. This is the type of resistor that I shall be evaluating and will be using in my experiment. A positive temperature coefficient thermistor has a resistance that increases with increase of temperature. The resistance of a semiconductor generally decreases with increase of temperature. Semiconductors are therefore used to manufacture NTC thermistors. When the temperature of a semiconductor is increased, the number of charge carriers increases as more valence electrons gain sufficient energy to break free from atoms to become conduction electrons. The number of charge carriers increases as the temperature is increased so the resistance of the semiconductor falls. Semiconductors are used to make a wide range of electronic devices including electronic chips, light emitting diodes and solid-state lasers. Communications, commerce and entertainment have been revolutionised as a result of semiconductor devices. In electrical terms, materials are classed as either conductors or insulators or semiconductors. Semiconductors are solid materials with conductivities in between the very high conductivity of metals and the very low conductivities of insulators. There are a variety of types of semiconductor, including metal oxides as well as elements like silicon and germanium. In insulators, essentially all the electrons are tightly bound to atoms or ions, and none are free to move under an external electric field. In effect, these materials do not conduct electricity at all. In metallic conductors, essentially all the atoms are ionised, providing free electrons, which move freely through the ions and can move under an external electric field. These conduction electrons 'glue' the ions together, and provide non-directional bonding which holds the material together. They become shared amongst all the atoms in the material instead of remaining attached to one atom. Semiconductors differ from both insulators and metallic conductors. Only a small proportion of atoms are ionised, so that although there are conduction electrons they are relatively small in number and the

Cultural Differences Paper

Many people throughout the world indentify themselves by their cultural background. It is common knowledge that there are many different cultures throughout the world. Each culture has its similarities and differences. Every individual has multiple identities Race, ethnic, gender, national, regional, organizational, personal, cyber/fantasy—that act in concert. The importance of any single identity is a result of the situation. As the context varies, you may choose to emphasize one or more of your identities. A conceptual inquiry into race or gender would seek an articulation of our concepts of race or gender (Riley 1988). For outside a rather narrow segment of the academic world, the term ‘gender’ has come to function as the police way to talk about the sexes. And one thing people feel pretty confident about is their knowledge of the difference between males and females. The situation is similar, if not worse, with respect to race. The self-evidence of racial distinctions in everyday American life is at striking odds with the uncertainty about the category of race. Is it useful to begin by reflecting on the questions: â€Å"What is gender? †, â€Å"What is race? † and related questions such as: â€Å"What is it to be a man or a woman? â€Å"What is it to be White? African American, or Latino? In this paper, we analyze the multicultural concepts of racial identity and gender identity and point out their significance in understanding cultural differences. Gender Identity Gender is a set of characteristics distinguishing between male and female, particularly in the cases of men and women. Depending on the context, the discriminating characteristics vary from sex to social role to gender identity. Gender being male or female is a basic element that helps make up and individual’s personality and sense o self. Gender identity disorder is a condition in which a male or female feels a strong identification with the opposite sex (Bussey K, Braunda 1999). A person with this disorder often experiences great discomfort regarding his or her actual anatomic gender. People with gender identity disorder may act and present themselves as members of the opposite sex and may express a desire to alter their bodies. The disorder affects an individual's self-image, and can impact the person's mannerisms, behavior, and dress. Individuals who are committed to altering their physical appearance through cosmetics, hormones and, in some cases, surgery are known as transsexuals A person with a gender identity is a person who strongly identifies with the other sex. The individual may identify with the opposite sex to the point of believing that he/she is, in fact, a member of the other sex who is trapped in the wrong body. This causes that person to experience serious discomfort with his/her own biological sex orientation. The gender identity disorder causes problems for this person in school, work or social settings. This disorder is different from transvestism or transvestic fetishism where cross-dressing occurs for sexual pleasure, but the transvestite does not identify with the other sex (Ruble DN 1994) Racial Identity Racial identity is which racial society a person mostly identifies with. However, in today’s world many people have two or more racial identities that make it more difficult for them to grasp and understand the cultural traditions and beliefs. On of the most prominent influences in America is President Barack Obama. As the Unites States first black president has taken office, a new report about race suggests it is a changeable marker of social status rather that a fixed characteristic of one’s birth. Jayson, 2008) Although this presidency will change history forever, President Obama will not be remember for the works that he does in office but for his ethical identity which has been in question since he has taken office. Multicultural, race and society have tremendous ethical influences on our lives, values and experiences. These can also provide a guideline for how we interact with one another on a daily bases. A person can account for suspicion and hat red among people of the same race when it comes to loyalty, affiliation and rigid adherence to stereotypical behavior as well as being the source of comradery and lasting unions. Through racial socialization, individuals are imbued with messages that determine the appropriateness and inappropriateness of their roles as racial being. (Carter, 1995) Racial identity can be one of the most important factors of a human life because it can determine how they live, love, and survive. Conclusion Begin your paper here. Double space the entire document. Be sure to indent the first line of each paragraph between five and seven spaces by pressing the Tab key one time on the keyboard. Happy writing!

The Theme Of Anti-Feminism In Alices Adventures In...

In today s society, sexism is evident in various parts of our everyday lives. Despite this, women are constantly breaking barriers and stereotypes that stem from what society deems to be feminine qualities. In the past, women have constantly proven their capabilities and that they are just as good as men. Yet, men continue to try to dominate and have control over women. Lewis Carroll proves this fact through a young and innocent heroine’s journey with the reoccurring themes of anti-feminism, unequal treatment of women, and the gender roles dictated by society. In the fantasy novel, Alice s Adventures in Wonderland, written by Lewis Carroll, there are numerous occasions where power inequality between men and women are profound through†¦show more content†¦During the tea party, Alice was constantly offended by all the rude comments she receives from the three host and guests. None of them welcome Alice to join the party and Alice decides to join on her own will instead. However, March Hare says â€Å"it [is not] very civil of [her] to sit down without being invited (Carroll 83). Besides, he also offers Alice to have some wine (83) which does not even exist in the party. This unenjoyable occasion makes Alice angry and leads her to leave the party. Alice declares that â€Å"at any rate, [she] will never go THERE again†¦. It s the stupidest tea-party [she] ever was at in all [her] life† (Carroll 94). Lastly, when Alice and the Gryphon meet the Mock Turtle, she shares her journey with them. Although the two creatures pay attention and listen to Alice while â€Å"[getting] so close to her, one on each side, and open their eyes and mouths so very wide† (Carroll 133), they are only interested in Alice’s story but not her. Furthermore, they treat Alice as an object of interest, an entertainment object as if â€Å"[they] had some kind of authority over Alice† (Carroll 134). This proves the fact that they do not care a bit about Alice and how she really feels. In conclusion, all of the encounters between Alice and the male characters, it justifies the fact that she is seen as a lower object by them, she is being disrespected and is