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Information Technology

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Displaying 1676 - 1700 of 2269

Bluetooth Dynamic Scheduling and Interference Mitigation

May 1, 2003
Author(s)
Nada T. Golmie
Bluetooth is a cable replacement technology for Wireless Personal Area Networks. It is designed to support a wide variety of applications such as voice, streamed audio and video, web browsing, printing, and file sharing, each imposing a number of quality

Hierarchical Restoration Scheme for Multiple Failures in GMPLS Networks

May 1, 2003
Author(s)
San-Nan K. Lee, C Kim, David W. Griffith
It is expected that GMPLS-based recovery could become a viable option for obtaining faster restoration than layer 3 rerouting. Even though dedicated restoration ensures restorability of connections, exclusive use of dedicated scheme would result in wasting

Network Provisioning as a Game Against Nature

May 1, 2003
Author(s)
Vladimir V. Marbukh
Traditional approaches to network provisioning assume availability of the reliable estimates for the expected demands. This assumption, however, oversimplifies many practical situations when some incomplete information on the expected demands is available

On Shortest Random Walks under Adversarial Uncertainty

May 1, 2003
Author(s)
Vladimir V. Marbukh
Finding shortest feasible paths in a weighted graph has numerous applications including admission and routing in communication networks. This paper discusses a game theoretic framework intended to incorporate a concept of path stability into the process of

The Effect of Delay Mismatch in MPLS Networks Using 1+1 Protection

May 1, 2003
Author(s)
David W. Griffith, Sanghun Lee, L Krivulina
High-capacity optical-fiber backbone networks protect information flows belonging to their premium customers by routing two copies of the customer's data over disjoint paths. This scheme, known as 1+1 protection, ensures that the customer will experience

Decoherence of a Superconducting Qubit due to Bias Noise

March 25, 2003
Author(s)
John M. Martinis, Sae Woo Nam, Joe Aumentado, Kristine Lang, C Urbina
We calculate for the current-biased Josephson junction the decoherence of the qubit state from noise and dissipation. The effect of dissipation can be entirely accounted for through a noise model of the current bias that appropriately includes the effect

Biometric Standards -- A Key to a More Secure World

March 1, 2003
Author(s)
Michael D. Hogan, Fernando L. Podio
Biometric technologies are becoming the foundation of an array of highly secure identification and verification solutions. Over the past eighteen months, the U.S has quickly worked to establish formal standards groups for accelerating and harmonizing the

Expected Multi-Hop Power Consumption in Mobile Ad-Hoc Networks

March 1, 2003
Author(s)
Camillo A. Gentile
Mobile Ad-Hoc Networks provide the means to reduce significantly the power required for routing from source to destination through multi-hops between other nodes in the network. In the presence of mobility, only continuous updating can guarantee routes

Joint Distribution of Link Distances

March 1, 2003
Author(s)
Leonard E. Miller
The calculation of two-hop connectivity between two terminals for randomly deployed wireless networks requires the joint probability distribution of the distances between these terminals and the terminal that is acting as a relay. In general the distances

Self-Adaptive Leasing for Jini

March 1, 2003
Author(s)
K Bowers, Kevin L. Mills, Scott W. Rose
Distributed computing environments require strategies by which components can detect and recover from failures in remote, collaborating components. Many protocols for distributed systems employ a strategy based on leases, which grant a leaseholder with

Spotlight - Biometric Authentication -- Are You Who You Claim To Be?

March 1, 2003
Author(s)
Michael D. Hogan
The recent establishment of the International Organization for Standardization/International Electrotechnical Commission Joint Technical Committee 1/Subcomittee 37 (ISO/IEC JTC 1/SC 37) on Biometrics is a major development in international standardization

Understanding the Correlation Structure of Network Traffic

December 24, 2002
Author(s)
Kevin L. Mills, J Yuan
This paper aims to improve current understanding of the correlation structure of traffic carried over large networks, such as the Internet. To achieve this aim we use simulation, adopting a methodology of homogenization to achieve a sufficiently large

Master-Slave Cluster Based Multihop Ad-hoc Networking

December 1, 2002
Author(s)
Hamid Gharavi, K Ban
This paper presents a master-slave cluster based mobile ad-hoc network architecture for multihop communications using the IEEE 802.11 system. The proposed architecture is a mixture of two different types of networks: managed (master-and-slave) and ad-hoc

2002 ITL Technical Accomplishments

November 1, 2002
Author(s)
Elizabeth B. Lennon
This report describes the activities and accomplishments of the Information Technology Laboratoy at the National Institute of Technology in 2002.

Advanced Question Answering for Intelligence AQUAINT Website

October 1, 2002
Author(s)
Ellen M. Voorhees
This paper demonstrates that, for large-scale tests, the match and non-match similarity scores have no specific underlying distribution function. The forms of these distribution functions require a nonparametric approach for the analysis of the fingerprint

An Analytical Approach to Shared Backup Path Provisioning in GMPLS Networks

October 1, 2002
Author(s)
Sanghun Lee, David W. Griffith, N-O Song
As GMPLS and its supporting set of protocols develop into a viable control plane for optical networks, an important function that they will need to support will be the restoration and protection function that has been a major feature of legacy optical

A New Classification of Information: A Step on the Road to Interpretability

September 1, 2002
Author(s)
Larry H. Reeker, Albert W. Jones
Complex systems, such as manufacturing supply chains, are often modeled as a collection of interacting components with information flows between them. These components are frequently responsible for making a wide range of decisions that are implemented

Healthcare Information Standards & Testing: A Concept Paper

September 1, 2002
Author(s)
Lisa J. Carnahan, Lynne S. Rosenthal
This paper was inspired by preliminary discussions between NIST and members of the healthcare community who are impacted by the use of emerging information technology. Topics of discussion included the current state of standards work in the healthcare

Kinetic Minimum-Power Routing and Clustering in Mobile Ad-Hoc Networks

September 1, 2002
Author(s)
Camillo Gentile, R E. Van Dyck, J Haerri
We have previously developed a distributed routing algorithm which minimizes the number of overhead messages necessary to maintain the minimum-power multi-hop routes in a mobile ad-hoc network, assuming a piece-wise linear model for the motion of the nodes

Security Guide for Interconnecting Information Technology Systems

September 1, 2002
Author(s)
Timothy Grance, Joan Hash, Steven Peck, Jonathan Smith, Karen Korow-Diks
The Security Guide for Interconnecting Information Technology Systems provides guidance for planning, establishing, maintaining, & terminating interconnections between information technology (IT) systems that are owned & operated by different organizations

Situated Computing: The Next Frontier for HCI Research

August 20, 2002
Author(s)
Kevin L. Mills, Jean C. Scholtz
Today, much of our information-intensive work is carried out at desktop computer workstations; however, increasingly people work and live on the move. Very soon, scads of small information processing appliances will be carried along from place to place as
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