20 Resources for

university of virginia

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University of Virginia Speeds Up Cardiac Imaging With IBM: University of Virginia (U.Va.) is recognized as one of the world's top academic institutions. To boost U.Va.'s research capabilities, the School of Engineering and Applied Science and the School of Medicine recently undertook a multiphase upgrade of the departments' information technology IT infrastructure, partially funded through IBM's Shared University Research...; Tags: University Of Virginia, IBM Corp., Linux, Strategy, Servers, Open Source, Operating Systems, Software, Management, Hardware; Case studies
RMAC: A Reliable Multicast MAC Protocol for Wireless Ad Hoc Networks: This paper presents a new MAC protocol called RMAC that supports reliable multicast for wireless ad hoc networks. By utilizing the busy tone mechanism to realize multicast reliability, RMAC has the following three novelties it uses a variable-length control frame to stipulate an order for the receivers to respond, such...; Tags: University Of Virginia, MAC, Collision, Wireless; White papers
A Taxonomy for Denial-of-Service Attacks in Wireless Sensor Networks: Wireless Sensor Networks WSNs are transitioning to real-world applications, where they face attacks already experienced by the Internet and wireless ad hoc networks. One such attack is that of Denial-Of-Service DOS, which is believed will only become more prevalent as sensor networks become more pervasive and accessible. With the inherent...; Tags: Denial Of Service, University Of Virginia, Network, Taxonomy, Sensor, Attack, Wi-Fi, Wireless, Security; White papers
Multi-Tag RFID Systems: Radio Frequency IDentification RFID is a promising technology that has many useful applications and is seen as a substitute for bar codes. This paper suggests and analyzes the effect of attaching more than one RFID tag to an object. Different types of multi-tag systems are denied and their benefits stated...; Tags: University Of Virginia, Author, RFID, Wireless, Security, Biometrics; White papers
Multi-Tag Radio Frequency Identification Systems: This paper proposes and analyzes the effects of attaching more than one RFID tag to each object. This paper defines different types of multi-tag systems and examines their benefits, both analytically and empirically and it also analyzes how multi-tags affect some existing tag singulation algorithms. This paper shows how multi-tags...; Tags: Paper, University Of Virginia, RFID, Engineering, Security, Wireless, Biometrics; White papers

Rational Swarm Routing for Mobile Ad-Hoc Wireless Networks: Wireless Mobile Ad-hoc NETworks MANET require dynamic routing schemes for adequate performance. This paper introduces a new dynamic routing scheme based upon stigmergy. In a similar manner to ant-colony based dynamic routing protocols, this scheme is able to respond to link quality changes after a path is established. However, load...; Tags: University Of Virginia, Performance, Mobile, Network, Wireless Network, IBM Corp., Performance Management, Wi-Fi, Wireless, Human Resources, Workforce Management; White papers 2008-01-28
A Distributed, Utility-Based Architecture for Task Assignment in Tactical WSNs: This paper develops architecture for task assignment in wireless sensor networks in support of tactical operations. The approach is based on a mathematical framework, which, based on multi-attribute utility theory, allows mobile end-users to easily express the value utility that they would attach to sensor information based on features associated...; Tags: University Of Virginia, Utility, Advertising & Promotion, Wi-Fi, Wireless, Marketing; White papers 2007-06-26
Design and Optimization of Distributed Sensing Coverage in Wireless Sensor Networks: For many sensor network applications such as military surveillance, it is necessary to provide full sensing coverage to a security-sensitive area while at the same time minimizing energy consumption and extending system lifetime by leveraging the redundant deployment of sensor nodes. This paper proposes a surveillance service for sensor networks...; Tags: University Of Virginia, Optimization, Network, Sensor, Wireless, Networking; White papers 2007-05-22
On Scheduling and Real-Time Capacity of Hexagonal Wireless Sensor Networks: Since wireless ad-hoc networks use shared communication medium, accesses to the medium must be coordinated to avoid packet collisions. Transmission scheduling algorithms allocate time slots to the nodes of a network such that if the nodes transmit only during the allocated time slots, no collision occurs. For real-time applications, by...; Tags: Algorithm, University Of Virginia, Network, Collision, Sensor, Transmission, Engineering, Wi-Fi, Networking, Wireless; White papers 2007-04-21
Images: This virtual road leads to Rome: Imagine what Rome in 320 A.D. would look like on Google Maps. Wait no more, UCLA and the University of Virginia have rebuilt the entire city--digitally.; Tags: Rome, University of Virginia, University of California at Los Angeles, Google Maps, Google Inc.; Image galleries 2007-06-25
SCUB: A Distributed, Utility-Based Architecture for Closed Loop Control With Wireless Sensor Networks: This paper develops architecture for task assignment in wireless sensor networks in support of closed-loop tactical operations. The approach is based on a mathematical framework, which, based on multi-attribute utility theory, allows either end-users to easily express the value utility that they would attach to sensor information based on features...; Tags: University Of Virginia, Network, Sensor, Wi-Fi, Wireless; White papers 2006-12-13
SeeMote: In-Situ Visualization and Logging Device for Wireless Sensor Networks: This paper addresses three challenges that are present when building and analyzing Wireless Sensor Networks WSN as part of ubiquitous computing environment: the need for an in-situ user interface, a data logger, and a power consumption meter. Solutions for the above have been presented using laptops, Personal Digital Assistants PDA,...; Tags: University Of Virginia, Network, Sensor, PDAs, Wi-Fi, Wireless, Handhelds, Hardware; White papers 2006-06-20
Efficient Coverage Algorithms for Wireless Sensor Networks: One of the biggest disadvantages of large scale wireless sensor networks lies on the complexity of logistics involving selective replacement of sensors that have ran out of energy. Fortunately, efficient power management schemes provide some relief as they are designed to extend network's lifetime and thus reduce the need of...; Tags: Algorithm, Power Management, University Of Virginia, Network, Sensor, Supply Chain, Wi-Fi, Wireless, Business Operations; White papers 2006-04-14
Thermal Attacks on Storage Systems: Disk drives are a performance bottleneck for data-intensive applications. Drive manufacturers have continued to increase the rotational speeds to meet performance requirements, but the faster drives consume more power and run hotter. Future drives will soon be operating at temperatures that threaten drive reliability. One strategy that has been proposed...; Tags: University Of Virginia, Disk, Performance, Storage System, Temperature, Attack, Performance Management, Storage, Human Resources, Workforce Management, Hardware; White papers 2006-03-14
The Need for Temperature-Aware Storage Systems: Over the past two decades, users have been enjoying a 40 percent annual growth in the data rate of disks, due to innovations in the recording technology coupled with a scaling up of the drive RPM. Since raising the RPM increases the heat that is generated due to viscous dissipation...; Tags: Aware, University Of Virginia, Storage System, Performance Management, Human Resources, Workforce Management; White papers 2006-02-28
Efficiency Centric Communication Model for Wireless Sensor Networks: Recent studies on radio reality provided strong evidence that radio links between low-power sensor devices are extremely unreliable. This paper studies how to improve energy efficiency for reliable communication using such unreliable links. The paper identifies an optimal bound on energy efficiency for reliable communication, and proposes a new communication...; Tags: University Of Virginia, Network, Communication, Radio, Sensor, Wireless, Energy Efficiency, Advertising & Promotion, Marketing; White papers 2006-01-07
Achieving Repeatability of Asynchronous Events in Wireless Sensor Networks With EnviroLog: Sensing events from dynamic environments are normally asynchronous and non repeatable. This lack of repeatability makes it particularly difficult to statistically evaluate the performance of sensor network applications. Hence, it is essential to have the capability to capture and replay sensing events, providing a basis not only for system evaluation,...; Tags: University Of Virginia, Event, Network, Sensor, Wireless, Networking; White papers 2006-01-06
Achieving Real-Time Target Tracking Using Wireless Sensor Networks: Target tracking systems, consisting of thousands of low-cost sensor nodes, have been used in many application domains such as battlefield surveillance, wildlife monitoring and border security. These applications need to meet certain real-time constraints in response to transient events, such as fast-moving targets. While the real-time performance is a major...; Tags: University Of Virginia, Network, Sensor, Target, Wireless, Networking; White papers 2005-12-16
An Advanced Wireless Sensor Network for Health Monitoring: This paper proposes system architecture for smart healthcare based on an advanced Wireless Sensor Network WSN. It specifically targets assisted-living residents and others who may benefit from continuous, remote health monitoring. This paper presents the advantages, objectives, and status of the design. An experimental living space has been constructed at...; Tags: University Of Virginia, Network, Sensor, Health Care, Vertical Industries, Benefits, Healthcare, Wi-Fi, Wireless, Enterprise Software, Software, Human Resources; White papers 2005-12-16
Implementation of a GMPLS-Based Network With End Host Initiated Signaling: This paper describes the authors' experiences in implementing an experimental wide-area GMPLS network called CHEETAH (Circuit-Switched End-to-End Transport Architecture). The key concept is to add a complementary end-to-end circuit based service with dynamic call-by-call bandwidth sharing to the connectionless service already available to end hosts via the Internet. The current...; Tags: Concept, University Of Virginia, Network, Networking, Ethernet; White papers 2005-09-25

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