Global Issues: Ozone Depletion, Global Warming and Acid Rain

Introduction

Air pollution is exerting increasing impact on the environment. Humans have been altering the chemistry of the atmosphere on a global scale. These changes may:
Modify the global climate
Threaten the health of human beings
Create many environmental problems such as
Acid rain
Depletion of ozone layer
Global warming
Seriously upset the global ecosystem

What is ozone depletion?

Ozone is a highly reactive gas comprising ....etc

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Telemanipulation of Snake-Like Robots for Minimally Invasive Surgery of the Upper Airway


Presented By:
Ankur Kapoor1, Kai Xu2, Wei Wei2
Nabil Simaan2 and Russell H. Taylor1

1 ERC-CISST
Department of Computer Science
Johns Hopkins University


2 ARMA: Advanced Robotics & Mechanism Applications
Department of Mechanical Engineering
Columbia University



Limitations of the Surgical Setup
Human-machine cooperative manipulation in surgery
Related Works:Surgical Dexterity Enhancement
Commercial Systems
Ze ....etc

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Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication. GSM is the name of a standardization group established in 1982 to create a common European mobile telephone standard that would formulate specifications for a pan-European mobile cellular radio system operating at 900 MHz. It is estimated that many countries outside of Europe will join the GSM partnership.Throughout the evolution of cellular telecommunications, various systems have been developed without the benefit of standardized s ....etc

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Is it possible to list a set of necessary and sufficient conditions to fully and
adequately characterize the lexical item mother? Try to come up with a couple
of such sets of conditions and then explain why they are insufficient. (Hint:
think of all the current terms which contain the word mother, including birth
mother, surrogate mother, stepmother, biological mother, adoptive mother,
natural mother, foster mother, unwed mother, genetic mother, etc.)
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Based on closed form expressions for the power frequency voltages and currents in a typical distribution network, the voltage regulation VR at any time point during the day could be evaluated. It will depend primarily on the network configuration, the daily load curve, the load density and its power factor as well as level of the reactive power compensation.

The computed at a certain time?t? can give a useful indicator for the voltage constancy over the network at that time point. The concept of ?Global Voltage Regulation? is introduced. Th ....etc

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This is a new technique for the protection of transmission systems by using the global positioning system (GPS) and fault generated transients. In this scheme the relay contains a fault transient detection system together with a communication unit, which is connected to the power line through the high voltage coupling capacitors of the CVT.

Relays are installed at each bus bar in a transmission network. These detect the fault generated high frequency voltage transient signals and record the time instant corresponding to when the initial ....etc

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