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Sit-to-stand (STS) failures represent one type of fall accidents caused by loss of balance on senior citizens when they are trying to make body movement from sitting to standing. For effective detection of STS failures, a wearable STS detection system was proposed and developed in this study, based on the combination of the angle change data collected from people's upper trunk and the electromyography...
The dipole antenna or dipole aerial is one of the most important and commonly used types of RF antenna. It is widely used on its own, and it is also incorporated into many other RF antenna designs where it forms the driven element for the antenna. In this paper, an attempt has been made to investigate new half wave dipole antenna for LTE Applications. A dipole antenna approximately one-half wavelength...
This paper aimed at investigating the performance of plasma windowing concept in terms of radiation pattern, gain, and S-parameter. The antenna structure consists of 12 tubes of commercial fluorescent lamps that contain a mixture of mercury vapor and argon gas, which upon electrification, forms plasma. After getting sufficient voltage, the gas inside the fluorescent tube will ionize to plasma and...
This paper proposes a novel scheme to estimate the percentage contribution of different attributes in a detected event (a process termed as event identification) for streaming multi-attribute data in WSNs. The proposed event detection and identification algorithm takes into account correlation among sensed attributes as well as the spatio-temporal correlations with similar attributes measured by neighboring...
Possible harmful effect of the low frequency electric and magnetic field on human health. This paper investigates using the COMSOL MULTIPHYSICS software modules in calculating the electromagnetic fields generated in the vicinity of High Voltage (HV) power transmission lines. The presented results in this paper demonstrate the effectiveness of using the electrostatic and magneto static modules of the...
Voltage stability analysis is the major concern in order to operate any power system safely. In this context considerable research work has been carried out to improve the voltage stability. FACTS devices can used for controlling power flow, transmission voltage, improving voltage profile, and reducing reactive losses. In this paper two different FACTS devices have been selected to place in suitable...
Several studies have been conducted to quantify the electromagnetic fields generated by power lines in order to evaluate the risk of these fields on human and animals health. In this paper, extremely low frequency electric and magnetic fields generated by a complex system contains six parallel high voltage lines are calculated using COMSOL — MULTI PHYSICS software. This study is used to analyze the...
By scaling down the feature size and emersion of multi-cores that are usually multi-thread processors, the performance requirements almost guaranteed. Despite the ubiquity of multi-cores, it is as important as ever to deliver high single-thread performance. Multithreaded processors, by simultaneously using both the thread-level parallelism and the instruction-level parallelism of applications, achieve...
The robustness of the time reversal (TR) scheme in a non stationary channel environment has been previously studied for ultra-wide band (UWB) channels. However, its robustness with different bandwidth specially for bandwidths significantly lower than ultra-wide bandwidths has not been established. In this paper, the performance of a TR communication system has been studied for large number of bandwidths...
Under the Malaysian New Economic Model, a few strategic reform initiatives (SRI) call for globally competitive and excellent engineers. The recruitment of students into engineering programs at Malaysian higher education institutes is based solely on the students' examination results. Hence, it is not known whether students who apply for engineering programs have the correct pre-conception of what...
Voice over IEEE 802.11 networks is a costeffective solution compared to cellular telephony in small areas and therefore considered among the killer applications of emergent Wireless Mesh Networks (WMNs). However, traditional random medium access control (MAC) protocols used in IEEE 802.11-based WMNs, which are suitable for throughput-sensitive data services, are far from guaranteeing the low delays...
Chemistry is not an easy subject to learn. Many people regard chemistry as being too hard, too abstract, too mathematical, and only for very bright students. As a result, a negative attitude has developed about chemistry with students claiming chemistry is boring. Besides, most of the chemical concepts articulated by macroscopic, microscopic, and symbolic. This led to conflict and confusion in learning...
A Q-switched Nd:YAG laser pulse was used to ablate a 4N pure graphite target through an IR lens. A solid state nuclear track detector (SSNTD) CR-39 has been used to calculate the energy of carbon ions produced as a result of the laser ablation and the whole experiment has been performed under pressure ~ 10-3 Torr in stainless steel vacuum chamber.The minimum and maximum energy of carbon ions observed...
In this paper, carbon thin films were prepared by KrF pulsed laser deposition at 20 °C and 300 °C. The surface morphology were characterized by atomic force microscopy (AFM). The nature of bonding of carbon thin films deposited at different temperatures has been done by using technique Fourier infrared transformation spectroscopy (FTIR).
We describe an ELECTRONIC SPEAKING GLOVE, designed to facilitate an easy communication through synthesized speech for the benefit of speechless patients. Generally, a speechless person communicates through sign language which is not understood by the majority of people. This final year project is designed to solve this problem. Gestures of fingers of a user of this glove will be converted into synthesized...
In this paper, we evaluate the performance of UMTS (Universal Mobile Telecommunication System) downlink system in vicinity of UWB system. The study is achieved via simulating a scenario of a building which is located within UMTS cell borders and utilizes from both UMTS and UWB appliances. The simulation results show that the UMTS system is considerably affected by the UWB interference. However, in...
In this paper, we investigate the problem of online data sharing on social networks from a game theoretic framework. We introduce blacklisting as trigger strategy to elicit cooperation among the players of a noncooperative sharing game. Using game theoretic analysis, we show the existence of an equilibrium in which the sharing conditions are honored when the involved players employ blacklisting strategies.
We present a personal data access control (PDAC) scheme inspired by protection schemes used in communities for sharing valuable commodities. We assume PDAC users are members of an online social network such as facebook.com. PDAC computes a ldquotrusted distancerdquo measure between users that is composed of the hop distance on the social network and an affine distance derived from experiential data...
Cognitive Radio (CR) is an emerging approach for a more efficient usage of the precious radio spectrum resources, which it considers an expanded view of the wireless channel by managing and adapting various dimensions of time, frequency, space, power, and coding. In this paper, we define the system requirements for cognitive radio, as well as the general architecture and basic physical and link layer...
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