CBSE Previous Year Question Paper 2013

                                              Set – I (Question)
Time allowed : 3                                                           hours Maximum Marks : 70
General Instructions:
1.All questions are compulsory.
2.This question paper consists of four A,B,C and D. Section A contains 8 quest ....etc

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Title: cognitive radio systems

Abstract

Efficient use of radio spectrum is a necessity for future wireless systems. While the vast majority of the frequency spectrum is licensed to different organizations, observations provide evidence that usage of the licensed spectrum is by far not complete

neither in the time domain nor the spatial domain. This material discusses basics of Cognitive radio (CR), classifications of

cognitive radio systems, cognitive system architecture, antenna design for cognitive radio system.

1. Introduction ....etc

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Onboard the space station, astronauts are surrounded by ammonia. It flows through pipes, carrying heat generated inside the station (by people and electronics) outside to space. Ammonia helps keep the station habitable.

But it's also a poison. And if it leaks, the astronauts will need to know quickly. Ammonia becomes dangerous at a concentration of a few parts per million (ppm). Humans, though, can't sense it until it reaches about 50 ppm.

Right: Astronaut Mike Fincke onboard the International Space Station.

Ammonia is just one ....etc

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RFID BASED SHOPPING TROLLEY
SYNOPSIS:
The objective of this project is to improve the speed of purchase by using RFID. This project is designed to use the RFID based security system application in the shopping trolley.
This project is used in shopping complex for purchase the products. In this project RFID card is used as security access for product. If the product is put in to the trolley means it will shows the amount and also the total amount. But in this project RFID card is used for accessing the products. So this project improves ....etc

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NanoTechnology
1
A glimpse into the Technology of 21st
Century NANOTECHNOLOGY
I. Introduction
Computers reproduce information at almost no cost. A push is well
underway to invent devices that manufacture at almost no cost, by treating
atoms like computers treat bits of information. This would allow automatic
construction of consumer goods with out traditional labour, like a Xerox
machine produces unlimited copies without a secretary retyping the original
information. Electronics is fuelled by miniaturization. Working smaller has
led to the too ....etc

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In 1993, during a conference at the UCLA Aluminium Centre Ben Rich, former CEO of Lockheed Martin, gave a very interesting speech on technological advances in space engineering over a period of forty years. He concluded his speech with the following quotation: We now have the technology to take ET home.
The fact that extraterrestrials can travel distances of hundreds of light years to visit planets in other solar systems or galaxies is emphatic proof of the supremacy of their technologies. It is, therefore, always been an effort of humans t ....etc

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slendertone wiring diagram

Slendertone Flex Pro Ab Belts And Electronic Muscle Stimulators - User Review Three

All firm and toned up with Slendertone!

Slendertone Advantages: pleasant to use and easy
Slendertone Disadvantages: you look like an alien when you're all wired up!

It's many years since I did much exercise apart from walking. I decided that I needed to improve my muscle tone. However, I had no intention of taking strenuous exercise or joining a gym.

A Slendertone machine was the perfect solution for me.

What is it exactly?
Th ....etc

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Presented By
P.J.ALBERT
RAKESH LAWRENCE
RAPHAEL A VAZHZAPILLY


DEFINITION
A family of materials with an ability to change few of its original properties by the application of any external stimuli, such as stress,temperature,moisture,ph,electric and magnetic fields are called SMART MATERIALS.
Evolution of smart materials
Most familiar engineering materials and structures until recently have been dumb
They have been preprocessed and/or designed to offer only a limited set of responses to external stimu ....etc

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In 1993, during a conference at the UCLA Aluminium Centre Ben Rich, former CEO of Lockheed Martin, gave a very interesting speech on technological advances in space engineering over a period of forty years. He concluded his speech with the following quotation: We now have the technology to take ET home.
The fact that extraterrestrials can travel distances of hundreds of light years to visit planets in other solar systems or galaxies is emphatic proof of the supremacy of their technologies. It is, therefore, always been an effort of humans t ....etc

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ABSTRACT
It is reported that millions of people are suffering from some kind of hearing impairment. The number is climbing due to the increasing portion of elderly people in the world s population. While hearing loss is usually caused by permanent mechanical damage to the ear, there is no medicine to reverse it, as surgery offers little help.
Thus the electronic hearing aid or prosthetic are the best known solutions to the patients. Hence a neurofuzzy approach for devices that combine neural networks and fuzzy logic to ach ....etc

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Many fast food items have flooded the markets but noodles remained as the most popular
item of all of them, as it is cheaper, very easy to make and nutritious. Urban and semi-urban
markets are controlled by Maggi and other players are Top Ramen and other brands. Maggi
has revolutionized the concept and this product has gone to majority of the urban
households. As an off-shoot of this development, noodles have become very popular in
India. Good quality and cheaper product can be pushed in the market with systematic
strategy and network (mp ....etc

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