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Title:
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Digital Power-line Technology in Construction Business and Home Automation Application |
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Author:
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Arlan Toy |
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Description:
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Digital power-line technology has developed over the past few years to become a viable alternative to dedicated wire, telephone, cable, and wireless networking technologies. Power lines are ubiquitous. The worldwide power grid is by far the most extensive copper wire network. Problems with attenuation and interference have been solved. Power-line technology is available for business LANs, hybrid WANs, and home automation systems. Power outlets become the network connection. Convenience and flexibility are two of the most important features of this technology. Cooperative efforts between the leaders in power-line and telecommunications sectors have led to the creation of the Open Services Gateway which allows for communications between disparate equipment and devices on the power-line network. There are many special uses of the technology in operation today. |
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Title:
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Implementation of a 622 Mbps Digital Modem |
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Author:
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Muli Kifle,Thomas P. Bizon,Nam T. Nguyen,Quang K. Tran,Dale J. Mortensen |
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Description:
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This paper presents the implementation and initial test results of an Orthogonal Frequency Division Multiplexing (OFDM) digital modem (modulator and demodulator) with an aggregate information throughput of 622 megabits per second (Mbps). The OFDM waveform is constructed by dividing an incoming data stream into four channels, each channel using either a 16-ary Quadrature Amplitude Modulation (16QAM) scheme or an 8-Phase Shift Keying (8PSK) scheme. The generation and detection of the composite waveform are performed using Discrete Fourier Transform (DFT) and polyphase filtering, to digitally stack and band-limit the individual carriers respectively. The four-channel OFDM approach enables the implementation of a modem that can be both power and bandwidth efficient, with sufficient parallelism to meet higher data rate goals. As a result, the OFDM modem requires only a 240 MHz bandwidth to transmit 622 Mbps. Hardware and simulation results in the form of spectrum diagrams and bit-error-rate (BER) curves are also presented in this paper. |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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Quality of Service for Real-Time Applications Over Next Generation Data Networks |
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Author:
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William Ivancic,Mohammed Atiquzzaman,Haowei Bai,Hongjun Su |
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Description:
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This project, which started on January 1, 2000, was funded by NASA Glenn Research Center for duration of one year. The deliverables of the project included the following tasks: Study of QoS mapping between the edge and core networks envisioned in the Next Generation networks will provide us with the QoS guarantees that can be obtained from next generation networks. Buffer management techniques to provide strict guarantees to real-time end-to-end applications through preferential treatment to packets belonging to real-time applications. In particular, use of ECN to help reduce the loss on high bandwidth-delay product satellite networks needs to be studied. Effect of Prioritized Packet Discard to increase goodput of the network and reduce the buffering requirements in the ATM switches. Provision of new IP circuit emulation services over Satellite IP backbones using MPLS will be studied. Determine the architecture and requirements for internetworking ATN and the Next Generation Internet for real-time applications. |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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Introduction to Object-Oriented Programming using C++ |
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Author:
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Peter Müller |
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Description:
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In this course, object-orientation is introduced as a new programming concept which helps in developing high quality software. Object-orientation is also introduced as a concept which makes developing of projects easier. In this tutorial only those language concepts that are needed to present coding examples are introduced. |
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Context
of Use:
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Professional Formation,
Vocational Training,
Continuous Formation. |
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Title:
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A Guide to Procurement of Trusted Systems: Computer Security Contract Data Requirements List and Data Item Description Tutorial |
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Author:
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National Computer Security Center |
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Description:
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A Guide to Procurement of Trusted Systems: Computer Security Contract Data Requirements List and Data Item Description Tutorial, Volume 3 of 4 in the Procurement Guideline Series, is written to be used by Federal Agencies to help facilitate the definition of computer security deliverables required in the acquisition of trusted products in accordance with DoD 5200.28-STD, Department of Defense Trusted Computer System Evaluation Criteria. It is designed for new or experienced automated information system developers, purchasers, or program managers who must identify and satisfy requirements associated with security-relevant acquisitions. The emphasis of this guideline is on the data requirements for products. Volume 3 specifies the data deliverables to meet security assurance needs by providing guidance on Contract Data Requirements Lists (CDRLs) and their associated Data Item Descriptions (DIDs). |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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IEEE 802.11 Tutorial |
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Author:
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Mustafa Ergen |
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Description:
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This document describes IEEE 802.11 Wireless Local Area Network (WLAN) Standard. It describes IEEE 802.11 MAC Layer in detail and It briefly mentions IEEE 802.11a, IEEE 802.11b physical layer standard and IEEE 802.11e MAC layer standard. |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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Extending an Enterprise with IBM WebSphere Voice Application Access |
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Author:
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Eddie Epstein |
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Description:
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Many business enterprises are providing mobile computing access for their employees, customers, and business partners. They understand the need for their
employees to have access to office services such as e-mail and calendars, as well as current business information. They also realize a strong competitive advantage in giving their partners and customers access to the information they need,
when and where they need it. This white paper is intended for solution architects and
developers who want to provide voice access for their mobile employees and customers, as well as those already developing interactive voice response solutions. This information can assist those who want to move to open standards-based application development, better integrate with visual self-service applications, and increase their overall organizational efficiency. It introduces IBM WebSphere®
Voice Application Access and its capabilities. It also describes the issues involved in creating voice applications. |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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What is "Object-Oriented Programming"? |
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Author:
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Bjarne Stroustrup |
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Description:
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"Object-Oriented Programming" and "Data Abstraction" have become very common
terms. Unfortunately, few people agree on what they mean. I will offer informal
definitions that appear to make sense in the context of languages like Ada, C++, Modula-2, Simula, and Smalltalk. The general idea is to equate "support for data abstraction" with the ability to define and use new types and equate "support for object-oriented programming" with the ability to express type hierarchies. Features necessary to support these programming styles in a general purpose programming language will be discussed. The presentation centers around C++ but is not limited to facilities provided by that language. |
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Context
of Use:
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Vocational Training,
Continuous Formation,
Professional Formation. |
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Title:
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Wireless in Local Loop? Some Fundamentals. |
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Author:
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K.Giridhar,Ashok Jhunjhunwala,Devendra Jalihal |
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Description:
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The enhancements in Internet technology and mobile access technology over the last decade can be leveraged effectively to build Wireless in Local Loop (WiLL) systems, which can enable rapid expansion of telecom and Internet access in developing countries. However, the design of a WiLL system requires one to understand some fundamentals concerning the Access Network and its connectivity to backbone network as well as the traffic requirement for a voice and Internet connection. The requirements of WiLL, in contrast to that of a Mobile cellular system need to be clearly understood. Equally important is the concern for capacity and spectral efficiency, especially as higher bit-rate Internet systems becomes a must for developing countries to get a fair share of the economic advantages that telecom technologies provide. This paper looks at these fundamental issues in context of GSM, IS-95 and DECT technologies. The paper further takes a brief look at some recent technological developments, which are likely to impact the Wireless in Local Loop systems.
The paper concludes with a discussion on the emerging third generation (3G) wireless standards, and the new technologies which are being introduced into the network, and what will be their impact on Internet and multimedia bit-rates and services.
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Context
of Use:
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Professional Formation,
Vocational Training,
Continuous Formation. |
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