Electrical and Computer Engineering

Blind signal separation and identification of mixtures of images

by Vania V. Estrela

Solving Transactional Control in Current Management Frameworks

by Vitor Roque

proc. of the 6th International Conference on Enterprise Information Systems - ICEIS2004, Porto, Portugal, 14-17 April 2004.

Policy Based Network Management has been presented as a paradigm for efficient and customisable management systems.... more Policy Based Network Management has been presented as a paradigm for efficient and customisable management systems. The IETF has provided a framework to describe the concept but some aspects still open like transactional control. In fact transactional control mechanisms are receiving today great attention in the scope of network management. In here, we identify the lacks of current management paradigms concerning transactional control and we propose a policy-based network management system that allows specify operations over aggregations of agents and that provides high-level atomic transactions.

Policies Composition Through Graphical Components

by Vitor Roque

proc. of the 5th International Conference on Enterprise Information Systems - ICEIS2003, Angers, France, 23-26 April 2003.

Policy based management have gained a crescent importance in the two last years. New demands on
internetworking,... more Policy based management have gained a crescent importance in the two last years. New demands on
internetworking, on services specification, on QoS achievement and generically on network management
functionality, have driven this paradigm to a very important level. The main idea is to provide services that
allow specifying management and operational rules in the same way people do business. Despite the main
focus of this technology has been associated with network management solutions, its generality allows to
extend these principles to any business process inside an organization. In this paper we discuss the main
proposals in the field, namely the IETF/DMTF model, and we present a proposal that allows the
specification of policy rules through a user-friendly and component-oriented graphical interface.

Dynamic Behavior of a Distribution System: High Penetration Level of Micro-turbines

by Francisco Gonzalez-Longatt

F. Gonzalez-Longatt, C. Peraza, C. Villanueva

Utility restructuring, technology evolution, public environmental policy, and expanding power demand are providing the... more Utility restructuring, technology evolution, public environmental policy, and expanding power demand are providing the opportunity for micro-turbines to become important energy resources. In order to investigate the ability of micro-turbine units in distribution systems, new simulation tools are needed. This paper presents a dynamic model for microturbines. The novelty of this paper is the use of the controlsoriented model of a permanent magnet synchronous generator. Furthermore, a realistic voltage source inverter with current band hysteresis control is included to simulate the micro-turbine system. The micro-turbine model is implemented in simulation software, and proved in grid-connected mode for several loading sequences. The impact of high penetration levels of microturbines plants in a typical distribution feeder is discussed too.

Multiple Neighbor Cell Lists in the Same Cell for LTE

by Nafiz Imtiaz Bin Hamid

Published in the proceedings of International Conference on Communication and Broadband Networking (ICCBN 2011) held in Kualalampur,Malaysia on June'2011and appeared in ASME Digital Library.

Cognitive radio architecture for rapidly deployable heterogeneous wireless networks

by Fadi Basma

Recent technological advances in cognitive radio based on software defined radio platforms have extended the... more Recent technological advances in cognitive radio based on software defined radio platforms have extended the capabilities of wireless communication systems. The unique ability to alter communication protocols to meet changing system demands makes cognitive radio suitable for wireless applications otherwise difficult to implement using conventional wireless terminals. One such wireless application is the rapid deployment of a heterogeneous wireless network for the purpose of establishing a communication infrastructure between an incompatible set of wireless consumer devices. This paper presents the design and implementation details of cognitive radio terminals used to build a rapidly deployable, frequency-agile, heterogeneous wireless network. Research findings assisted researchers in the development of a wireless transceiver capable of connecting a variety of wireless transceivers, detecting the presence of interference, and accordingly switching to available channels as allocated by its spectrum sensing capability. The focus of this paper is to propose an architecture for cognitive radio terminals that can be used to build rapidly deployable wireless network applications.

Projection based feature extraction process for Bangla script: A modified approach

by Nafiz Imtiaz Bin Hamid

International Conference on Software Technology and Engineering (ICSTE 2009),July 24-26,2009 in Chennai, India.

Enhancing Bengali character recognition process applying heuristics on Neural Network

by Nafiz Imtiaz Bin Hamid

International Journal of Computer Science and Network Security (IJCSNS);ISSN : 1738-7906.Vol. 9 No. 6;July 2009. pp. 154-158.

Downlink SNR to CQI Mapping for Different Multiple Antenna Techniques in LTE

by Nafiz Imtiaz Bin Hamid

Published in the proceedings of 2011 Global Congress on Science and Engineering (GCSE'2011).To appear in Procedia Engineering,Elsevier

In Quest of the Better Mobile Broadband Solution for South Asia Taking WiMAX and LTE into Consideration

by Nafiz Imtiaz Bin Hamid

Journal of Telecommunications (ISSN:2042-8839), Vol.2 Issue 1,April 2010. pp.86-94

Optimizing the Handover Procedure in IEEE 802.16e Mobile WiMAX Network

by Nafiz Imtiaz Bin Hamid

3rd National Conference on Communication and Information Security (NCCIS 2009),Dhaka,Bangladesh