Mohd Ezanee Rusli

Markov Chain-based analytical model of Opportunistic Routing protocol for wireless sensor networks

In a resource constrained wireless sensor network (WSN), communication tasks can be expensive in terms of power consumption. Thus, when good communication is required, a mechanism that can maximize the chances of a successful transmission of information via wireless network is very desirable. The Opportunistic Routing (OR) protocol [1, 2] has been proposed as an alternative and efficient method for exploiting the spatial and temporal characteristics of a wireless network. In this paper, we propose an analytical framework model based on Markov Chain of OR and M/D/l/K queue to measure its performance in term of end-to-end delay and reliability in wireless sensor network. The performance predicted by the proposed framework is validated through simulation and is in very good agreement. We also discuss the enhancement strategy on OR to achieve better QoS guarantee in term of delay constraint.

An Improved Indoor Positioning Algorithm Based on RSSI-Trilateration Technique for Internet of Things (IOT)

Indoor positioning system (IPS) allows an object to be located and tracked within an indoor environment. With the introduction of Internet of Things (IoT), the business interest in location-based application and services has also increased. Hence, the demand for accurate indoor localization services has become important. Until now, researches related to IPS are still being conducted with the objective to improve the performance of positioning techniques. Trilateration is one of the techniques available to determine the location of an object. This paper proposes an improved WiFi trilateration-based method for indoor positioning system. The improved model is based on the test results which was conducted by using Intel Galileo (Gen2) board as an access point. The signal blocking problem caused by obstacles existed inside the building is resolved by improving received signal strength measurement. The proposed model includes implementation of trilateration technique to determine the position of users and then using specific reference points to improve the positioning results.

A study of meditation effectiveness for virtual reality based stress therapy using eeg measurement and questionnaire approaches

Various approaches are available to evaluate the effectiveness of stress therapy. In this research, we compared virtual reality based stress therapy and imaginary technique which includes cultural elements such as typical Malaysian environment in 3D, Mozart, soothing breathing exercise and audio. It examines meditation effectiveness between virtual reality based stress therapy and imaginary technique using Electroencephalograph. The effectiveness of the virtual reality therapy and imaginary technique are measured by NeuroSky eSense Meditation level. Findings for both approaches indicated that there are positive changes in participants’ meditation state. Moreover, the virtual reality participants were observed to be in a better meditation state (significantly different) compared to the imaginary participants at the end of the study.

Virtual reality-based technique for stress therapy

Stress is a response that often make patients become un-stabled physically and mentally. Until recently, various types of treatment are practiced by physiologists to remedy stress problems. Virtual reality (VR) technology that is able to create an immersive 3D environment can be a better treatment therapy in comparison to existing techniques particularly to an imaginary technique. In this paper, we propose an immersive VR-based stress therapy that includes typical Malaysian environment in 3D, zikr, which is an Islamic ritual prayer and soothing audio. In order to prove the effectiveness of the VR-based stress treatment, comparative studies between VR-based and imaginary techniques was conducted and analysed.

Study of immersion effectiveness in VR-based stress therapy

Stress problems often causes negative emotional response which tends to lead to a negative work performance. There are many treatments for stress such as going to gymnasium, undergoing hypnosis and taking medicine. Lately, virtual reality therapy (VRT) has been proposed as an alternative technique for stress treatment. In this VR-based treatment, one of the important elements to ensure its effectiveness is the level of immersion. In order to prove that the level of immersion does contribute to the effectiveness of the VR-based stress treatment, comparative studies with imaginary technique was conducted and analysed. In this paper, we present a comprehensive study on the effect of immersion level to participants when using our VR-based stress therapy [1] that includes typical Malaysian environment in 3D, zikr, and soothing audio.

Financial impacts of smart meter security and privacy breach

Many power utility companies around the world are moving towards smart grid, which integrates power delivery infrastructure with information and communication technologies. Smart meter is one of the main components of smart grid. The task of a smart meter is to track energy consumption of a premise and send that information to the utility company. Although the use of smart meter has many benefits, there are a number of security concerns regarding its usage. One particular concern is regarding the impacts of security and privacy breach of smart meter. This paper focuses on the financial impacts of smart meter security and privacy breach. The financial impacts discussed in this paper are derived from the impacts of security and privacy breach described in the literature. It is found out that the financial loss may involve various parties including the premise owner, the utility company, as well as the nation. The amount of loss can also go up to billions of dollars. Given the large group of people who may be involved and the large amount of money to be potentially lost should a security or privacy breach occur, it is very important for power companies to establish a security policy regarding smart meter and to allocate reasonable amount of resources to secure the deployed smart meter as well as the rest of the smart grid infrastructure.

Performance analysis of implicit acknowledgement coordination scheme for opportunistic routing in wireless sensor networks

The Opportunistic Routing (OR) protocol provides an alternative and efficient method for exploiting the spatial and temporal characteristics of wireless networks. In addition to prioritisation and selection of relay nodes, another important aspects of the OR protocol is its ability to coordinate between potential relays node. A common approach for coordination is based on a mechanism known as the slotted time and priority-based acknowledgement scheme which relies on the use of control packets. In resource-constrained wireless sensor networks (WSN) with limited amount of energy, an excessive number of transmissions involved in the scheme may not be favourable. In addition, the coordination time overhead for this scheme can also potentially increase the end-to-end delay which can be critical for the WSN applications with delay-constraint requirement. In this paper, we propose a coordination scheme that achieves better energy efficiency with shorter end-to-end delay for WSNs. Through simulation analysis, we show the advantage of the proposed scheme in terms of the average packets end-to-end delay and energy efficiency.

SnoezelenCAVE: Virtual Reality CAVE Snoezelen Framework for Autism Spectrum Disorders

Autism Spectrum Disorder has become broadly recognized around the world, and Snoezelen (i.e. multi-sensory room) is one of the methods that provides therapy for Autism Spectrum Disorder. This paper presents a system proposal of a new technique called “SnoezelenCAVE” that relies on immersive virtual reality technology. In this “SnoezelenCAVE”, a Multi-sensory environment will be developed in a CAVE setup. It includes an integration of hand motion device and voice recognition system. This proposed designs will focus on virtual environments stimulating visual learning, auditory techniques and natural free hand interaction method in relaxing virtual environments.

Implementing immersive virtual reality: Lessons learned and experience using open source game engine

This paper share in details the experiences gained during the development of a Virtual Reality application for a stress treatment. Throughout the twelve months development period, authors have faced numerous challenges and difficulties. Those challenges are encountered while setting up an open source game development platform called Cryengine and while integrating this engine with VR gadgets such as Kinect, audio system, Razer hydra, and Head Mount Display (HMD). This paper also discusses the solution for each of this problem. Note that a stress treatment will not be included because it is outside the scope of this paper.

An adaptive coordination scheme for Opportunistic Routing protocol in wireless sensor networks

In a resource constrained wireless sensor network (WSN), communication tasks can be expensive in terms of power consumption. Thus, when good communication is required, a mechanism that can maximize the chances of a successful transmission of information via wireless network is very desirable. The Opportunistic Routing (OR) protocol [1, 2] has been proposed as an alternative and efficient method for exploiting the spatial and temporal characteristics of a wireless network. One of the important aspects of OR protocol procedure is the coordination among potential relays of each node. In delay based coordination scheme, potential performance deficiency especially the end-to-end delay may occur. Based on a realistic link layer, a performance analysis was conducted using simulation approach to investigate the deficiency of coordination procedure of OR protocol in WSN. In this paper, we propose a local adaptive coordination mechanism based on online quality score value of all potential relays which can further improve the performance of OR protocol in WSN in term of end-to-end delay, packet success rate and energy efficiency.