INTRODUCTION For three decades‚ satellite communications have been used for public switched telephone network (PSTN) and video broadcasting applications. However‚ with daily technology advancements made in society and the requirement for global data connectivity‚ satellites are increasingly being used to provide data communication links at all data rates ranging from 64 Kbps to 155 Mbps (Buchsbaum). Wireless technology allows data to be sent out into space to a satellite and back to earth to provide
Premium Transmission Control Protocol Satellite Satellite television
Cryptographic Authentication for Real-Time Network Protocols1‚2 David L. Mills3 Abstract This paper describes a new security model and authentication scheme for distributed‚ real-time network protocols used in time synchronization and event scheduling applications. It outlines the design requirements of these protocols and why these requirements cannot be met using conventional cryptography and algorithms. It proposes a new design called autokey‚ which uses a combination of public-key cryptography
Premium Cryptography RSA
A channel of distribution can be defined as the collection of organizational units‚ institutions‚ or agencies within or external to the manufacturer‚ which perform the functions that support product marketing. The marketing functions are pervasive: they include buying‚ selling‚ transporting‚ storing‚ grading‚ financing‚ bearing market risk‚ and providing marketing information. Any organizational unit‚ institution‚ or agency that performs one or more of the marketing functions is a member of a channel
Premium Marketing
OFDM-based Cooperative Communications in a Single Path Relay Network and a Multiple Path Relay Network A Thesis Presented to The Academic Faculty by Victor Kai Yuen Wu In Partial Fulfillment of the Requirements for the Degree Master of Science School of Electrical and Computer Engineering Georgia Institute of Technology December 2006 OFDM-based Cooperative Communications in a Single Path Relay Network and a Multiple Path Relay Network Approved by: Dr. Ye (Geoffrey) Li‚ Advisor School of Electrical
Premium Trigraph Power Gain
Analysis of Some popular Mobile Social Network Systems Chang Tong Helsinki University of Technology tchang@cc.hut.fi lot‚ and are very social. [11] Although the number of mobile social network users is not very great at present‚ people With the rapid development of mobile devices and wireless believe that mobile social network will become much more technologies‚ a large number of mobile social network sys- popular in the near future. tems have emerged in the last few years. The migration of In
Premium Social network service Mobile phone Twitter
greek words: cyto- cell‚ and metry - measurement. So cyto-metry is about making cell measurements. To elaborate‚ flow cytometry is a technique for analysing particles (cells in this case) which are suspended in a fluid stream by flowing the cells past an interrogation point. A light source is directed on to a hydrodynamically focused stream to create a zone for interrogation. As cells flow through this interrogation zone they scatter the light‚ at this point any fluorescent compounds that are inside
Premium Light
installation....................................................... 18 NPS 3 Introduction The NPS design is based on many years of experience with installations around the world. With the NPS‚ ABB delivers reliable operation in all climatic conditions and configurations. In addition‚ the NPS can be either manually or remotely controlled‚ with the option of incorporation into automated networks as a sectionalizer. Thanks to its modular construction and important design features‚ the NPS is a key component
Premium Transformer
expected average outcome over many observations.The common symbol for the mean (also known as the expected value of X) is ‚ formally defined by Variance - The variance of a discrete random variable X measures the spread‚ or variability‚ of the distribution‚ and is defined by The standard deviation is the square root of the variance. Expectation - The expected value (or mean) of X‚ where X is a discrete random variable‚ is a weighted average of the possible values that X can take‚ each value
Premium Probability theory Binomial distribution Random variable
more science to the art of meeting customer demand." With headquarters in El Segundo‚ California‚ Mattel has offices and facilities in 42 countries and sells its product in more than 150 nations throughout the world. The locations of its seven distribution centers like California‚ New Jersey and Texas‚ seven manufacturing plants‚ and other facilities that make up its vast worldwide supply chain. Since the launch of the T.M.X. Elmo in Sept 2006‚ T.M.X has reportedly sold out‚ leaving intense
Premium Retailing Wal-Mart
described money flow as the extent at which money flows into in an organisation‚ usually made from effective spending and financing activities. The components of cash flow must be evident on a planner so that it will be understood easily on how it occurred exactly. According to Donaldson & Gerard (2005)‚ he stated that if cash is not observed carefully‚ the return which might have been planned might not be recognized by the organisation. So therefore‚ one needs to have the facts of how cash flows and integrate
Premium Health care Nursing National Health Service