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Modem Design Issues in LMDS Systems
During the last 2-3 years, there has been considerable activity aimed towards deploying broadband wireless access systems. The US Local Multipoint Distribution Services (LMDS) auctions in February-March 1998 of 1.3 GHz of spectrum between 27.5 GHz and 31.3
Compensation of Thermal Expansiveness In Plastic DCA-Flip-Chip Assemblies Using A Mechanically Compliant Dielectric
Application of a compliant, low modulus dielectric layer between the chip joints (C4) and the carrier can decrease the thermally induced bending and probability of failure. Model analysis and experimental data indicate that the optimal thickness of the
Ion Energy Distributions in Inductively Coupled Radio-Frequency Discharges in Argon, Nitrogen, Oxygen, Chlorine, and Their Mixtures
We report ion energy distributions, relative ion intensities, and absolute total ion current densities at the grounded electrode of an inductively-coupled Gaseous Electronics Conference radio-frequency reference cell for discharges generated in pure argon
Electron Drift and Attachment in CHF 3 and its Mixtures With Argon
Measurements are reported of the electron drift velocity, w, in CHF 3 gas and in its mixtures with argon. The E/N dependence of w in the mixtures exhibits regions of distinct negative differential conductivity. A small electron attachment rate constant (-
Multiconductor Transmission-Line Characterization: Representations, Approximations, and Accuracy
This paper investigates a measurement method that characterizes lossy printed multiconductor transmission lines, its accuracy, the choice of measurement representations, and some simple approximations. We illustrate the method with measurements of a pair
Kinetic-energy Distributions of Positive and Negative Ions in Townsend Discharges in Oxygen
Translational flux-energy distributions of positive and negative ions have been measured at high electric field-to-gas density ratios (E/N) up to 40 x 10 -18 V m 2 (40 kTd) in diffuse, parallel-plate Townsend discharges in oxygen using an ion energy
Ion Energy Distributions and Sheath Voltages in Radio-Frequency-Biased, Inductively Coupled, High-Density Plasma Reactor
International Comparison of Thermal Noise-Temperature Measurements at 2, 4 and 12 GHz
Electron Interactions With Cl 2
Low energy electron interactions with the Cl 2 molecule are reviewed. Information is synthesized and assessed on the cross sections for total electron scattering, total rotational excitation, total elastic electron scattering, momentum transfer, total
Guide for Developing Security Plans for Information Technology Systems
Enhancements to Data Encryption and Digital Signature Federal Standards
This ITL Bulletin, February 1999, summarizes proposed changes to two Federal Information Processing Standards (FIPS): FIPS 46-2, Data Encryption Standard, and FIPS 186, Digital Signature Standard. It outlines the proposed enhancements to the two standards
Enhancements to Data Encryption and Digital Signature Federal Standards
Simulation and Performance Study of PNNI ATM Networks
This paper presents the simulation and performance of PNNI ATM networks by using an ATM PNNI Routing Protocol Simulator (APRoPS). This simulator was developed based on the ATM Forum s PNNI routing protocol specification. With this simulator, one can design
Using S-Check ML Version 3 (supersedes NISTIR 5789)
A Role-Based Access Control Model and Reference Implementation Within a Corporate Intranet
This paper describes NIST's enhanced RBAC model and our approach to designing and implementing RBAC features for networked Web servers. The RBAC model formalized in this paper is based on the properties that were first described in Ferraiolo and Kuhn [1992
The NIST Microwave Power Standards in Waveguide
The National Institute of Standards and Technology (NIST) microwave power standards in waveguide consist of automated microcalorimeters and associated transfer standards. Each transfer standard is a bolometric dc substitution power detector (a thermistor
Low Energy, Ion-Induced Electron and Ion Emission from Stainless Steel: The Effect of Oxygen Coverage and the Implications for Discharge Modeling
Absolute yields of electrons and negative ions resulting from positive ions impacting stainless steel have been determined as a function of impact energy for clean and oxygen-covered surfaces. Photoelectron emission has been used to monitor the effect of
A Role-Based Access Control Model and Reference Implementation Within a Corporate Intranet
Secure Web-Based Access to High-Performance Computing Resources
An authentication framework is described that provides a secure meansor clients to access remote computing resources via the Web. Clientsauthenticate themselves to a proxy Web server using a secure protocoland a digital certificate. The server constructs a
Secure Web-Based Access to High Performance Computing Resources
Total Electron Scattering Cross Section for Cl 2
Absolute measurements of the total electron scattering cross section for chlorine, Cl2, are reported for electron energies ranging from .3 eV to 23 eV. The present data are in reasonable agreement with previous measurements of the cross sections for total
Surface Energy Formula for a Hsieh-Clough-Tocher Element
Ion-Molecule Reactions and Ion Kinetics in DC Townsend Discharges in Dielectric Gases
The transport of positive and negative ions plays an important role in the initiation and behavior of discharges in gaseous dielectrics. In many cases, the identities, intensities, and kinetic energies of ions are determined by ion-molecule collisions
Failure Dynamics of the IGBT During Turn-Off for Unclamped Inductive Loading Conditions
The internal failure dynamics of the Insulated Gate Bipolar Transistor (IBGT) for unclamped inductive switching (UIS) conditions are studied using simulations and measurements. The UIS measurements are made using a unique, automated nondestructive Revers
Characterization of Power Electronics System Interconnect Parasitics Using Time Domain Reflectometry
The significance of interconnect parasitics of power electronics system is their affects on converters' EMI-related performances, such as voltage/current spikes, dv/dt, di/dt, conducted/radiated EMI noise, and the like. In this paper, a time domain refle
S2M2 A Java Applet-Based SMIL Player
Synchronized Multimedia Integration Language (SMIL) of the World Wide Web Consortium (W3C) is a simple but powerful declarative language, which extends the current multimedia technology on the Web with temporal synchronization capabilities. It uses the
Digital Signature Standard (DSS)
[Superseded by FIPS 186-2 (January 27, 2000): http://www.nist.gov/manuscript-publication-search.cfm?pub_id= ] This standard specifies a suite of algorithms which can be used to generate a digital signature. Digital signatures are used to detect unauthorized
Digital Signature Standard (DSS)
An Inexpensive Video Signal Multiplexer for Multi-Camera Machine Vision in Automated Analytical Laboratory Systems
Java-Based Multimedia Collaboration and Application Sharing Environment
Multimedia desktop conferencing systems that include audio, video and application sharing are gaining momentum and increasingly becoming a reality. This paper describes one such system called Java Collaborative Environment (JCE). The application sharing