university college dublin

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Analysis of Transparent Mode IEEE 802.16j System Performance With Varying Numbers of Relays and Associated Transmit Power

In this paper, the system capacity of IEEE 802.16j systems operating in transparent mode is investigated under varying numbers of relays and associated transmit power. The study is based on an extended variant of an analytical model defined in previous work and used to determine the throughput gain that can...

Tags: Performance, IEEE, Analysis, University College Dublin, RSS, Internet

White papers 2008-10-06

Analysis of Variation in IEEE802.11k Channel Load Measurements for Neighbouring WLAN Systems

This paper focuses on analysing the variation in IEEE802.11k channel load measurements for neighbouring WLAN systems. The channel load functionality was implemented in the QualNet simulation tool, and several scenarios were configured for testing. The effects of different numbers of active systems with different traffic patterns were examined. The results...

Tags: Channel, Measurement, Variation, Analysis, University College Dublin, Wireless LANs, LANs, Productivity, Wi-Fi, Wireless And Mobility, Networking

White papers 2008-06-19

Multi-Hop RFID Wake-Up Radio: Design, Evaluation and Energy Tradeoffs

Energy efficiency is a central challenge in battery-operated sensor networks. Current energy-efficient mechanisms employ either duty cycling, which reduces idle listening but does not eliminate it, or low power wake-up radio, which adds complexity and cost to the sensor platform. This paper proposes a novel mechanism called RFIDImpulse that uses...

Tags: Node, University College Dublin, RFIDImpulse, RFID, Managed Hosting, Wireless And Mobility, Security, Biometrics

White papers 2008-05-15

Performance Analysis of Transparent Relays in 802.16j MMR Networks

A simulation study of the performance of transparent mode relay-based 802.16j systems is described. The study focuses on the gain in throughput that is possible in omnidirectional relay systems and increases in signalling requirements that arise due to the multihop network architecture. The study finds that the introduction of transparent...

Tags: Performance, Relay, University College Dublin, Performance Management, Network Administration, Networking, Human Resources, Workforce Management

White papers 2008-02-22

On the RFID Wake-Up Impulse for Multi-Hop Sensor Networks

Communication protocols for wireless sensor networks reduce the energy consumption by duty cycling the node activity and adopting a periodic sleeping scheduling. This approach often results in idle listening and therefore energy dissipated for listening to a channel free from packet transmitted. Duty cycling trades-off energy consumption due to idle...

Tags: Network, Radio, Sensor, RFID, University College Dublin, Advertising & Promotion, Marketing

White papers 2007-10-04

Planning Base Station and Relay Station Locations in IEEE 802.16j Multi-Hop Relay Networks

In this paper, a problem formulation for determining optimal node location for Base Stations BSs and Relay Stations RSs in relay-based 802.16 networks is developed. The formulation results in an Integer Programming problem. A small modification to the original model is also considered in which the state space is reduced...

Tags: Technique, Network, Formulation, IEEE, University College Dublin, Productivity, WiMAX, Wireless And Mobility

White papers 2007-10-04

The Application of Genetic Programming to General Purpose GPU Computation

Genetic programming is a natural computing approach developed by John Koza. It differs from many earlier approaches in that it has no phenotype/genotype distinction. In the traditional GA for example individuals are represented at the genotype level by a bit vector. The genetic operations of crossover and mutation are performed...

Tags: Vector, Programming, GPU, University College Dublin, Development Tools, Software Development, Software/Web Development

White papers 2006-12-21

Admire Framework: Distributed Data Mining on Data Grid Platforms

This paper presents the ADMIRE architecture; a new framework for developing novel and innovative data mining techniques to deal with very large and distributed heterogeneous datasets in both commercial and academic applications. The main ADMIRE components are detailed as well as its interfaces allowing the user to efficiently develop and...

Tags: University College Dublin, ADMIRE Component, Data Mining, Business Intelligence, Marketing Research, Productivity, Databases, Enterprise Software, Software, Data Management, Marketing

White papers 2006-07-14

Performance of VoIP Over IEEE 802.11g DSSS-OFDM Mode With IEEE 802.11e QoS Support

This paper examines, via simulation, the performance of an 802.11e MAC over an 802.11g PHY operating in DSSS-OFDM mode. The DSSS-OFDM scheme provides data rates of up to 54Mb/s as well as interoperability with 802.11b nodes. Due to the widespread use of 802.11b nodes, such interoperability is an important consideration....

Tags: Interoperability, IEEE 802.11, VoIP, QoS, Performance, IEEE 802.11g, Mode, IEEE, University College Dublin, Wireless LANs, Wi-Fi, Wireless

White papers 2005-03-18

Additional Resources

How a student fooled the world's media

How a student fooled the world's mediaDid you use Wikipedia as a source on this? You have an error ...The Wikipedia article originally said that Shane Fitzgerald attended "Dublin University", which within Wikipedia redirects to "University of Dublin" ... which as of this edit is where you are showing...

Tags: Wiki, Advertising & Promotion, Wikipedia, media

Discussion threads 2009-05-13

Mashup culture shatters crusty, stodgy old approach to business app dev

When I first launched Mashup Camp in the beginning of 2006, virtually all of the mashups that developers brought to the event were consumerish in nature. Most had to do with music, video, or maps and none were hardcore business applications geared at something as mundane as driving sales....

Tags: Web technology, Video, Software Infrastructure, IT Management, General

Blog posts 2007-07-23

Cry the beloved country!

Cry the beloved country!South Africa WiFiRead P. J. O'Rourke's book "All the trouble in the world," specifically his chapter on Bangladesh. The chapter on Africa is also illuminating. His thesis- much of the world's problem stem from a combination of governmental corruption and/or lassitude, and popular passivity - the latter...

Tags: Network technology, IP

Discussion threads 2006-09-07

University Limits Spam, Reduces IT Costs With E-Mail Filtering Service

Ireland's oldest and most famous university, Trinity College Dublin, was fighting a growing spam problem. Each day, university staff and students received dozens of unsolicited e-mail messages, forcing them to spend the first half-hour of their day deleting unwanted, and sometimes offensive, messages. Of the 20 million messages sent and...

Tags: Information Technology, University, e-Mail Message, Microsoft Corp., E-mail Filtering, E-mail, Online Communications

Case studies

With New Messaging System, Students and Staff Enjoy New Features, Enhanced Security

The University of Dublin, Trinity College, founded in 1592, is Ireland's oldest university. As Trinity College's 8,000 staff and post-graduate students increasingly depend on messaging systems for communication, the college sought to provide a modern, secure, and well-managed messaging service. Working with Microsoft Services, Trinity College deployed the Microsoft Exchange...

Tags: Security, Messaging, Microsoft Corp., Messaging System, Instant Messaging, Groupware, Internet, Online Communications, Enterprise Software, Software

Case studies