Micro Electro-Mechanical Systems (MEMS) :: essays research papers

Micro Electro-Mechanical Systems Micro Electro-Mechanical Systems (MEMS) is the integration of mechanical elements, sensors, actuators and electronics on a common silicon substrate using microfabrication techniques. MEMS are a hot area of research because they integrate sensing, analyzing and responding on the same silicon substrate hence promising realization of complete systems-on-a-chip. As MEMS are manufactured using batch fabrication techniques similar to IC technology, MEMS are expected to deliver high functionality at low prices. Current systems are limited by the capability of sensors and actuators, as these are bulkier and less reliable than the microelectronic circuit. In a MEM system the sensors act as the ‘eyes’ and gather data about the environment. The microelectronic circuit, which is the ‘brain’, processes the data and accordingly controls the mechanical systems, the ‘arms’ of the MEMS, to modify the environment suitably. The electronics on the MEMS are manufactured using IC techniques while micro machining techniques are used to produce the mechanical and electromechanical parts. MEMS Fabrication: There are number of methods to fabricate MEMS like silicon surface micromachining, silicon bulk machining, electro discharge machining, LIGA (in German, Lithographie, Galvanoformung(Electro Plating), Abformung(Injection Moulding)) .Only silicon surface micromachining is discussed here. Silicon Surface Micromachining Silicon surface micromachining uses the same equipment and processes as the electronics semiconductor industry. There are three basic building blocks in this technology, which are the ability to deposit thin films of material on a substrate, to apply a patterned mask on top of the films by photolithographic imaging, and to etch the films selectively to the mask. A MEMS process is usually a structured sequence of these operations to form actual devices. 1. Deposition Processes: One of the basic building blocks in MEMS processing is the ability to deposit thin films of material. This is achieved either through the processes like PVD or CVD. 2. Lithography: Lithography in the MEMS context is typically the transfer of a pattern to a photosensitive material by selective exposure to a radiation source such as light. In lithography for micromachining, the photosensitive material used is typically a photoresist. When resist is exposed to a radiation source of a specific a wavelength, the chemical resistance of the resist to developer solution changes. 3. Etching: If the resist is placed in a developer solution after selective exposure to a light source, it will etch away one of the two regions (exposed or unexposed). Then another layer of material is deposited and the first layer selectively etched away as shown in the figure resulting in the required MEMS.

Check Point: Critical Thinking and Sexual Decision Making

Critical Thinking and Sexual Decision Making Misty M. Jones PSY/265 September 26th, 2012 Nicole Pansey Critical Thinking and Sexual Decision Making Critical thinking is an integral part of college. To think critically; you must be skeptical, observant, resourceful (as far as gathering information goes), and you must weigh the truths of what you find against what you have been told. Based on the way I define critical thinking; I cannot think of an instance where I applied critical thinking to having sex, unless you count how I choose birth control.Quite a few people do not consider the decision making process regarding birth control and contraceptives as part of the sexual process. I do regard it as such, for many reasons. The first is that you have to consider potential allergies when choosing a birth control method, whether it is condoms, Depo-Provera, an implant, an intrauterine device, or birth control pills. I can’t take pills because I forget to take them.I tried being on a pill for birth control as a teenager, and even with them sitting right in front of my alarm clock I could not remember to take them. However, because I generally dislike needles, I could remember that in one or two or three months (depending on when I received my last shot) I had an appointment to get more Depo-Provera. After the birth of my son Lucian, I had to choose a new birth control method; especially because for the entire year prior the only that had been used was condoms.After much discussion with my fiance, I got the new implant Implanon. At this point let me explain why I am so picky about birth control. Advertisements for birth control flood commercials, especially on networks with shows whose target audiences are teenagers. Yet for all the advertising there are things you are not informed of. For example, condom commercials do not warn you that if you allergic to latex you should ask your doctor before using them. While that concept may be common sense, most eople do not even read the box the condoms come in. I think the reason I think so critically about birth control is because I made stupid mistakes as a teenager. The bottom line is that critical thinking can prevent pregnancies and sexually transmitted infections. Thinking critically only takes about two minutes when it comes to whether or not one is prepared to have sex, you are either using protection or you aren’t†¦I would advise using protection whenever possible though.

Socrates And Machiavelli A Political Philosopher

At first glance, Socrates and Machiavelli appear to have a lot in common. They both lived in a time of political unrest and violence. They both dealt with uncertain surroundings in their societies. Most importantly, they both tried to use philosophy to improve their society. However, there was also an important difference between them. While Socrates was a moral philosopher whose goal was to search for truth and knowledge, Machiavelli was a political philosopher whose goal was to create a lasting society with a Prince that could hold power. Because of their clashing ideals, it is unlikely that Socrates would be supportive of a Machiavellian political system or Prince, though there are specific aspects of the society that Socrates would†¦show more content†¦For example, one thing Machiavelli mentions is that it is necessary for a Prince to appear â€Å"merciful, faithful, humane, trustworthy, and religious,† to his subjects. However, Machiavelli believes that actually having those qualities is irrelevant, as long as it looks like he is to his people. Socrates would not approve of this sort of deception of the population. When Socrates discusses wisdom and his quest for knowledge, he talks about how when he talked to both the poets and the craftsmen, they thought themselves knowledgeable in many aspects that they were not, which led him to conclude that true wisdom is knowing the limitations of knowledge. This common theme for Socrates, the acknowledgement of one’s shortcomings, is diametrically opposed to Machiavelli’s version of a Prince, who appears virtuous regardless of how accurate that is. Because of this, Socrates would not agree with Machiavelli on what makes a good Prince. In addition, Socrates and Machiavelli would disagree on the most important form of education that a Prince should engage in. Machiavelli argues that the only important thing a Prince needs to study is the art of war. He goes so far as to argue that, â€Å"A Prince†¦ must not have any other object nor any other thought, nor must he adopt anything as his art but war, its institutions, and its discipline.† He continues by saying that even during peacetime, a Prince needs to occupy his mind and train himselfShow MoreRelatedMachiavelli And Socrates Similarities1437 Words   |  6 Pagessame way. This is the case with two philosophers, Socrates and Machiavelli, who both lived during times of internal political strife. Greece was divided into numerous city states that were constantly at war with one another and hundreds of years later, Italy would also experience this political fragmentation and violence. Despite having these identical environments, Socrates and Machiavelli adopted two very distinctive and contrasting perspectives. Socrates used his experiences and the environmentRead MoreCompare And Contrast Socrates And Machiavelli1419 Words   |  6 PagesSocrates vs. Machiavelli: The meaning of truth As philosophers, both Socrates and Niccolo Machiavelli developed theories in response to the warring political environment around them. However, the theories and principles developed by the two philosophers are vastly different in regard to the concept of truth, Socrates would hate Machiavelli’s model prince due to Machiavelli’s manipulative view of truth. While Socrates desired a state that focuses on fundamental truth and ethical decisions, MachiavelliRead MoreMachiavelli s The Prince And Plato s Apology1697 Words   |  7 PagesMachiavelli’s â€Å"The Prince† and Plato’s â€Å"Apology† Philosophers have unique and yet similar ways of interpreting life through a variety of different values and beliefs appointed to oneself. Some philosophers have the ability and courage to stand up to what they are trying to accomplish or for what they believe in, even if consequences follow their actions. Machiavelli and Plato have different perspectives and goals in their writing, however their stories also have some underlining similarities suchRead MoreThe Relationship Between Machiavelli And Machiavelli s The Prince1075 Words   |  5 PagesWhile some philosophers have similar opinions on what it takes to be an effective leader, such as intelligence and worldliness, there are many that disagree on traits they find beneficial. The reasons for these disagreements are vast but one of the crucial factors are the societies and historical eras these authors were nurtured within. Through their own experiences with government and turmoil, philosophers are able to give their critiques on government and human nature as a whole. Socrates and MachiavelliRead MoreSocrates And Machiavelli1660 Words   |  7 Pagesworks of Socrates and Machiavelli are as polarized as the phrases â€Å"the unexamined life is not worth living† and â€Å"the ends justify the means.† The Prince by Machiavelli and The Last Days of Socrates by Plato are both crucial texts to the discussion of what makes a good political leader. Well, what makes a good political leader? Socrates would disagree with Machiavelli’s ideation of the Prince because of the immorality that he allows this model to have in the public sphere. However, Socrates would findRead MoreSimilarities Of Socrates And Machiavelli1669 Words   |  7 PagesBoth Socrates and Machiavelli emerged as renowned thinkers of their time because of their approaches to government that moved away from idealism and towards a rational and real approach. To understand why Socrates would be critical of Machiavelli’s concept of a Prince we must understand the similarities and differences between the two philosophers, and then analyze if Socrates would find his ruling system to be efficient. Socrates and Machiavelli value the qualities of a strong and fair ruler, howeverRead MoreSocrates, Machiavelli, And Rousseau s Views On Political Ethics1722 Words   |  7 PagesSocrates, Machiavelli, and Rousseau are three philosophers discussing political ethics from entirely different perspectives. This paper argues that Socrates, Machiavelli, and Rousseau are all idealists regarding their stances on political ethics. First, this paper argues that Socrates is an idealist due his belief that the current government has much more potential than it is currently reaching, and that the government could eventually be changed. Second, this paper argues that Rousseau is an idealistRead MoreNiccolo Machiavelli And Plato1693 Words   |  7 PagesNiccolo Machiavelli and Socrates (through Plato) have both given the world plenty of advice when it comes to governing. Both men have contributed to the debate of what a ‘prince’, or ruler, should look like. They lived in different time periods but were both surrounded by political uncertainty and fragmentation, which contributed to their views of government. Their ideals of a prince overlap in ways, but overall there are glaring differences in how they think a ‘prince’ should rule. A strong exampleRead MoreSocrates And Niccolo Machiavelli1735 Words   |  7 PagesEssay 1: Socrates and Machiavelli Although Socrates and Niccolo Machiavelli lived in different time periods, the political climate that their philosophies were founded on were very similar. The trial of Socrates began after the Peloponnesian War when the new Spartan Tyranny took over the Athenian government. Socrates was accused of corrupting the youth and disrespecting the gods by the Spartan government. In the eyes of the Spartan government Socrates is a gadfly because of his posing of upsettingRead MoreThe Political Philosophy Of Niccolo Machiavelli And Socrates1444 Words   |  6 PagesAmong the most well-known and notorious philosophers, Niccolo Machiavelli and Socrates laid the groundwork for western political philosophy and modern day politics. Though both lived through times of political transition and war, the fragility of their politics, violence of their wars, and the leaders they lived under influenced the development of their differing ideologies about the governing of principalities. From Machiavelli’s experience, came, â€Å"The Prince,† a guidebook about the importance of