1 Introduction Electrostatic thrusters (“ion engines”) are the best developed type of electric propulsion device, dating in conception to the ‘50’s,(1) and having been demonstrated in space in 1964 on a suborbital flight of the SERT I spacecraft(2). The early history

Chapter 5 Electronic commerce information's search and selection In physical markets, consumer search activities include reading advertisements, calling endors, and visiting stores. In a virtual marketplace, all these activities seem to converge into Web searches and Web browsing. Not surprisingly, search services are the first market infrastructure to be built in the electronic marketplace

The only practical way to accelerate something in free space is by reaction. The idea is the same as in air breathing propulsion (to push something backwards) but in rockets the “something” must be inside and is lost. Here is a revealing derivation of the thrust equation for vacuum:

The result appears to be trivial, but it is not. Notice that the “velocity increment” ∆V is actually equal to the decrease in orbital velocity. The rocket is pushing forward, but the velocity is decreasing. This is because in a r-2 force field, the kinetic energy is equal in magnitude but of the opposite sign

Local Scope vs. Global Scope of an Identifier Detailed Scope Rules to Determine which Variables are Accessible in a block Determining the Lifetime of a Variable Initializations in Declarations Interface Design Writing a Value-Returning Function for a Task Some Value-Returning Functions with Prototypes in Header Files cctype and cmath

Chapter 11 Electronic Commerce logistics 11.1 The Overall Electronic Commerce Logistics 11.1.1 The Logistics And the Logistical System Interest in the Internet has changed so drastically in recent years that one can speak of a universal breakthrough. The remarkable increase in users can be attributed mainly to the appeal of the World Wide Web, the Internet feature that is enjoying the greatest growth. There is some

Chapter Electronic Payment systems 10.1 Traditional Electronic Payment Systems for Electronic Commerce In electronic commerce, the challenges of payment transactions were initially underestimated Business via the internet and mobile telephony has so far been dominated by the methods of payment customary in traditional business. However, in light of technological progress

We are going to consider the forces exerted on a material. These can be external or internal. External forces come in two flavors: body forces(given per unit mass or volume) and surface forces(given per unit area). If we cut a body of material in equilibrium under a set of external forces along a plane as shown in fig. 1. and consider one side of it we draw two conclusions: 1 the equilibrium provided by the loads from the side taken out is provided by a set of forces that are distributed among the material particles adjacent to

Lead-in The news that a sheep in Scotland has been successfully cloned 1) got me wondering What good would it be to clone humans? What would I do with a clone of myself? Then 2) it hit me that I could have my clone go into work for me while went out hiking, biking, sking,etc.! really could be in two places at once

CPIME on the Prevention of crim Original: english and the Treatment of offenders Vienna, 10-17 April 2000 Item 6 of the provisional agenda Offenders and victims: accountability and fairness in the justice process Women in the criminal justice system Background paper for the workshop on women in the criminal justice system