Universiti Teknologi Malaysia

About: Universiti Teknologi Malaysia is a education organization based out in Johor Bahru, Malaysia. It is known for research contribution in the topics: Membrane & Adsorption. The organization has 21644 authors who have published 39500 publications receiving 520635 citations.

A Comprehensive Study of Data Collection Schemes Using Mobile Sinks in Wireless Sensor Networks

Abstract: Recently sink mobility has been exploited in numerous schemes to prolong the lifetime of wireless sensor networks (WSNs). Contrary to traditional WSNs where sensory data from sensor field is ultimately sent to a static sink, mobile sink-based approaches alleviate energy-holes issues thereby facilitating balanced energy consumption among nodes. In mobility scenarios, nodes need to keep track of the latest location of mobile sinks for data delivery. However, frequent propagation of sink topological updates undermines the energy conservation goal and therefore should be controlled. Furthermore, controlled propagation of sinks' topological updates affects the performance of routing strategies thereby increasing data delivery latency and reducing packet delivery ratios. This paper presents a taxonomy of various data collection/dissemination schemes that exploit sink mobility. Based on how sink mobility is exploited in the sensor field, we classify existing schemes into three classes, namely path constrained, path unconstrained, and controlled sink mobility-based schemes. We also organize existing schemes based on their primary goals and provide a comparative study to aid readers in selecting the appropriate scheme in accordance with their particular intended applications and network dynamics. Finally, we conclude our discussion with the identification of some unresolved issues in pursuit of data delivery to a mobile sink.

Analysis of factors critical to construction project success in Malaysia

Abstract: Purpose – The purpose of this paper is to study the principal factors that are critical to the success of a construction project in Malaysia, and determine their relative importance as perceived by different respondents. The findings of this study will provide the researcher with up‐to‐date information in formulating appropriate strategies to address the challenges brought about by human‐related issues. The paper will only discuss the first part of the ongoing research based on the pilot survey.Design/methodology/approach – Following a thorough literature search, a total of 37 factors were consolidated and grouped into seven major categories. These factors were assembled into a questionnaire survey and distributed to clients, consultants and contractors. The respondents represent a wide range of professions, including those who are involved in design, construction, engineering, project management and quantity surveying. An analysis of the responses identified 15 factors to be accepted as critical to the s...