results when individual particle-size decreases. The first military stride teat came about inferential of this technology was the development of military uniform‚ using nanoscale materials to integrate electronics‚ computer devices and power supply. In addition to ballistic protection. For instance‚ today if you want to stop a .45 caliber bullet you need about 10 to 20 pounds per square foot. Where we are headed with nanoscience and technology is the ability to stop a bullet with as much as two or three
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Entertainment in the 1990’s Have you ever thought about when your favorite things first became popular and why? Many leisure activities of today originated in the 1990’s. The 1990’s were very influential within the entertainment industry because of their food‚ music‚ and movies. The 1990’s showed a big change in food. It was the decade where the Food Network came onto the air‚ garlic became more commonly used and many delicious foods were invented (Neman). Emeril Lagasse was a very popular chef
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Chapter 1. Introduction to Computer Organization and Computer Evolution I. Computer Organization and Computer Architecture In describing computers‚ a distinction is often made between computer architecture and computer organization. Although it is difficult to give precise definitions for these terms‚ a consensus exists about the general areas covered by each. Computer Architecture refers to those attributes of a system visible to a programmer or‚ put another way‚ those attributes that have a
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Power electronics Mid-1 Objective exam 2011 1.When UJT is used for triggering an SCR‚ the wave shape of the voltage obtained from UJT firing circuit is a a) Sine wave (b) saw tooth wave (c)trapezoidal wave (d) Square wave 2. In a thyristor circuit‚ the angle of conduction can be changed by changing (a) anode Voltage (b) Anode Current (c) Forward Current rating (d)gate Current 3. Freewheeling diodes are mainly used for (a) Better utilization factor (b) di/dt protection
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GROUP DISCUSSION Electronic media like mobile phone‚ tabs‚ computer and electronic games give impacts on young people today. Many aspects of their lives are affected. Discuss which aspect of life of a student most affected by electronic media. Candidate A : The Study Habits Candidate B : The Social Relationships Candidate C : The Family Relationships _____________________________________________________________________________________________________________ A: Good morning to everyone
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and Effects of Using Electronic Devices Chapter 1 Introduction The function of education is to teach one to think intensively and to think critically. Intelligence plus character - that is the goal of true education. Martin Luther King‚ Jr. We know that education is one of the most fundamental tools for progression. In contrast‚ we are allowing some students to use electronic devices that may intervene in the learning catch up of the students. Using an electronic device for activities
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Computer is playing vital role in modern life. Computer education has great importance because use of computer has reached almost all spheres of life. The modern life of today includes information and contacts with people all over the world. Computer has helped considerably to achieve this. This is possible through computer education when a person knows the use of computer‚ he can employ in his business‚ for planning and chalking out programmed. Calculations and statical works. The internet
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Effects of Computer on Society Everyone knows that this is the age of computer and majority of people are using computer. Development of science and technology has direct effect on our daily life as well as in our social life. Computer technology has made communication possible from one part of the world to the other in seconds. They can see the transactions in one part of the world while staying in the other part. Computer development is one of the greatest scientific achievements of the 20 the
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What’s the difference between resistance and resistivity? Resistance is the obstruction offered to the flow of current by a conductor. Resistivity is the obstruction offered to the flow of current by UNIT AREA OF the conductor. So basically‚ resistance is the property of the object (say a copper wire)‚ whereas resistivity is the property of the substance (copper). And so resistance depends upon the properties of the object. Whereas resistivity depends upon the properties of the metal.
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BASIC DIODE ELECTRONICS INTRODUCTION TO DIODES The p-n Junction The p-n junction is a homojunction between a p-type and an n-type semiconductor. It acts as a diode‚ which can serve in electronics as a rectifier‚ logic gate‚ voltage regulator (Zener diode)‚ switching or tuner (varactor diode); and in optoelectronics as a light-emitting diode (LED)‚ laser diode‚ photodetector‚ or solar cell. In a relatively simplified view of semiconductor materials‚ we can envision a semiconductor as having two
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