Peter Cole

Reliable routing scheme for indoor sensor networks

Indoor Wireless sensor networks require a highly dynamic, adaptive routing scheme to deal with the high rate of topology changes due to fading of indoor wireless channels. Besides that, energy consumption rate needs to be consistently distributed among sensor nodes and efficient utilization of battery power is essential. If only the link reliability metric is considered in the routing scheme, it may create long hops routes, and the high quality paths will be frequently used. This leads to shorter lifetime of such paths; thereby the entire networks lifetime will be significantly minimized. This paper briefly presents a reliable load-balanced routing (RLBR) scheme for indoor ad hoc wireless sensor networks, which integrates routing information from different layers. The proposed scheme aims to redistribute the relaying workload and the energy usage among relay sensor nodes to achieve balanced energy dissipation; thereby maximizing the functional network lifetime. RLBR scheme was tested and benchmarked against the TinyOS-2.x implementation of MintRoute on an indoor testbed comprising 20 Mica2 motes and low power listening (LPL) link layer provided by CC1000 radio. RLBR scheme consumes less energy for communications while reducing topology repair latency and achieves better connectivity and communication reliability in terms of end-to-end packets delivery performance.

Weighted RED (WTRED) Strategy for TCP Congestion Control

This work presents the Weighted Random Early Detection (WTRED) strategy for congestion handling in TCP networks. The strategy dynamically adjusts RED’s maximum threshold, minimum threshold and weight parameters to increase network performance. This work describes RED and FRED implementations and highlights their disadvantages. Using the NS-2 simulator, we compare WTRED with these classic congestion control strategies. The simulation results demonstrate the shortcomings of RED and FRED. The results also show that WTRED achieves greater link utilization and throughput than RED and FRED.

An Intelligent SPAM filter - GetEmail5

As the increasing reliance on electronic mail (email) continues, unsolicited bulk email (SPAM) also continues to grow because it is a very cheap way for advertising. These unwanted emails are now causing a serious problem in clogging the Internet traffic and filling up the email inboxes thereby leaving no space for legitimate emails to pass through. In addition, dealing with SPAM messages is costly to the users as it requires time and effort to examine them individually. In this paper, we propose an intelligent and trainable SPAM filter called GetEmail5. We have also evaluated the proposed filter against two commercial filters, EmailProtect and SpamEater

A knowledge management platform for the promotion of modern rural energy services in ASEAN countries

Modern rural energy service (MRES) has been developed and implemented for years. It offers lots of advantage such as efficient energy and clean environment. However, MRES is used only in a particular group due to the lack of knowledge end promotion. This paper proposes the design end development of a knowledge management platform for promotion of MRES in ASEAN countries. The proposed system employs Web service technologies for enhancing and distribution the utilization of MRES.

A Taxonomy of Occlusion in View Signature II Representations: A Regular Language for the Representation of 3-D Rigid Solid Objects

The View Signature II (VSII) representation is a viewer-centred modelling scheme. The VSII representation requires one VSII view signature to represent a single view of an object and is invariant to rotation about the z axis. This is achieved by constructing a linear string of alpha-numeric characters from circular strings representing different concentric levels in a view of an object. The tokens and algorithmic methods for the construction of a VSII produce a language for the modelling of 3-D rigid solid objects. This paper briefly describes the VSII representation and the general construction methods. Due to the cyclic nature of the representation it has been possible to define a taxonomy of occlusion in VSII representations. This paper discusses the differing forms of occlusion and gives methods where appropriate to assist in matching occluded views with complete views in the model store.

Modelling 3-D Rigid Solid Objects Using The View Signature II Representation Scheme

Computer vision systems have varied applications and often the first goal of a vision system is the recognition of 3-D rigid objects. Model-based recognition systems rely upon a model to represent an object both tersely and uniquely to allow for efficient matching. The View Signature II (VSII) representation is a viewer-centred modelling scheme. The VSII representation requires one VSII view signature to represent a single view of an object and is invariant to rotation about the z axis. This is achieved by constructing a linear string of alpha-numeric characters from circular strings representing different concentric levels in a view of an object. A view signature is an ordered list of junction and level signatures and can be considered a string for matching purposes. Junction signatures represent the cotermination of edges and contours with their respective adjacent surfaces. A feature of view signature construction is the uniform processing of both the stored model and matching input, thereby removing the possibility of incompatibility between model and input. The motivation for the View Signature representation, its syntax and a technique for modelling 3-D rigid objects is described.