Yanti Erana Jalil

Multi-objective Optimization (MOO) approach for sensor node placement in WSN

It is desirable to position sensor nodes in a Wireless Sensor Network (WSN) to be able to provide maximum coverage with minimum energy consumption. However, these two aspects are contradicting and quite impossible to solve the placement problem with a single optimal decision. Thus, a Multi-objective Optimization (MOO) approach is needed to facilitate this. This paper studies the performance of a WSN sensor node placement problem solved with a new biologically inspired optimization technique that imitates the behavior of territorial predators in marking their territories with their odours known as Territorial Predator Scent Marking Algorithm (TPSMA). The simulation study is done for a single objective and multi-objective approaches. The MOO approach of TPSMA (MOTPSMA) deployed in this paper uses the minimum energy consumption and maximum coverage as the objective functions while the single objective approach TPSMA only considers maximum coverage. The performance of both approaches is then compared in terms of coverage ratio and total energy consumption. Simulation results show that the WSN deployed with the MOTPSMA is able to reduce the energy consumption although the coverage ratio is slightly lower than single approach TPSMA which only focuses on maximizing the coverage.

A compact ultra wideband antenna with WiMax band rejection for energy scavenging

Radio Frequency (RF) energy harvesting has been rapidly advancing as a promising alternative to existing energy scavenging system. A well designed broadband antenna such as ultra-wideband (UWB) antenna can be used as one of the major components in an RF energy scavenging system. This paper presents a compact UWB antenna showing good impedance matching over a bandwidth of 2.8 to 11 GHz, suiTable for broadband RF energy scavenging. Nevertheless, the antenna usage in wireless communication has a limitation due to the problem of interference between UWB system and other narrowband systems. Thus, the proposed antenna is successfully designed with a single band-notched at the targeted WiMAX operating band of 3.3 to 3.6 GHz.

A compact ultra wideband antenna with band-notched design

The coexistence issues caused by the spectrum overlapping between wideband system and other narrowband system has been a major concern. This paper proposed a compact ultra-wideband (UWB) antenna with a frequency notch at the WiMAX band. The proposed antenna consists of an octagon-shaped patch fed by a 50 Ω microstrip line. The ground plane is truncated to improve the overall bandwidth. An altered H-shaped slot is etched on the proposed radiator to introduce the band-notch function. The antenna demonstrates a good impedance matching over a bandwidth of 2.8 to 11 GHz with reasonable radiation patterns. The band rejection performance and gain reduction in the frequency band of 3.3 to 3.6 GHz is successfully achieved. Transient analysis of the designed antenna indicates stable signal transmission confirming its suitability for short-range UWB impulse radios. Additionally, the proposed antenna has a compact size of 26 × 32 mm2.

A compact ultra wideband antenna with dual band-notched design

The coexisting issue between ultra-wideband (UWB) system and narrow band system has been a major concern for quite a while. A filtering property is required in a wideband system in order to avoid the potential interference from other established narrow band system. Therefore, an UWB antenna with notch band function is highly sought after to eliminate the interfering signals. This paper presents a compact UWB antenna integrated with dual band notched and desirable gain characteristics. The proposed antenna consists of an octagon shaped patch with a truncated ground plane that is fed by a 50 Ω microstrip line. By inserting two altered H-shaped slots on the proposed radiator, dual band-notch at the targeted WiMAX frequency band of 3.3 to 3.6 GHz and WLAN frequency band of 5.1 to 5.8 GHz are created. The proposed antenna is successfully designed and simulated showing good impedance matching from 2.8 GHz to 11 GHz. Furthermore, the proposed antenna has a compact size of 26 × 32 mm2.

A compact ultra wideband antenna with WLAN (IEEE 802.11a) band rejection

The problem of interference between ultra-wideband (UWB) system and other narrow band systems has been a major concern for a long time. This paper presents a compact UWB antenna that shows desirable band-notch and gain characteristics. The proposed antenna consists of an octagon-shaped patch with a truncated ground plane that is fed by a 50Ω microstrip line. The frequency notch characteristic is obtained by inserting two C-shape slots on the radiating patch. The proposed antenna is successfully designed and simulated showing good impedance matching and reasonable radiation patterns over a bandwidth of 2.8 to 11 GHz. Furthermore, the proposed antenna has a compact size of 26 × 32 mm2 while exhibiting the band rejection performance in the frequency band of 5.15 to 5.85 GHz.

Pole tilt monitoring system using MEMs accelerometer and BeagleBone Black

Received Mar 3, 2018 Revised Apr 11, 2018 Accepted Apr 21, 2018 Paintball has gained a huge popularity in Malaysia with growing number of tournaments organized nationwide. Currently, Ideal Pro Event, one of the paintball organizer found difficulties to pair a suitable opponent to against one another in a tournament. This is largely due to the manual matchmaking method that only randomly matches one team with another. Consequently, it is crucial to ensure a balanced tournament bracket where eventual winners and losers not facing one another in the very first round. This study proposes an intelligent matchmaking using Particle Swarm Optimization (PSO) and tournament management system for paintball organizers. PSO is a swarm intelligence algorithm that optimizes problems by gradually improving its current solutions, therefore countenancing the tournament bracket to be continually improved until the best is produced. Indirectly, through the development of the system, it is consider as an intelligence business idea since it able to save time and enhance the company productivity. This algorithm has been tested using 3 size of population; 100, 1000 and 10,000. As a result, the speed of convergence is consistent and has not been affected through big population.N. N. S. Abdul Rahman, N.M. Saad, A. R. Abdullah, M. R. M. Hassan, M. S. S. M. Basir, N. S. M. Noor 1,2,4,6Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia 2,3Center for Robotics and Industrial Automation, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia 3,5Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, MalaysiaLight rail transit (LRT), or fast tram is urban public transport using rolling stock similar to a tramway, but operating at a higher capacity, and often on an exclusive right-of-way. Indonesia as one of developing countries has been developed the LRT in two cities of Indonesia, Palembang and Jakarta. There are opinions toward the development of LRT, negative and positive opinions. To reveal the level of LRT development acceptance, this research uses machine learning approach to analyze the data which is gathered through social media. By conducting this paper, the data is modeled and classified in order to analyze the social sentiment towards the LRT development.Mohamad, S., Nasir, F.M., Sunar, M.S., Isa, K., Hanifa, R.M., Shah, S.M., Ribuan, M.N., Ahmad, A. 1,4,6,7,8Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia 1,2,3UTM-IRDA Digital Media Centre, Media and Game Innovation Centre of Excellence, Universiti Teknologi Malaysia, Johor, Malaysia 1,2,3Faculty of Computing, Universiti Teknologi Malaysia, Johor, Malaysia 5Centre for Diploma Studies, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia 6Research Centre for Applied Electromagnetics, Universiti Tun Hussein Onn Malaysia, Johor, MalaysiaReceived Jan 31, 2018 Revised Apr 21, 2018 Accepted Apr 30, 2018 Bluetooth is an emerging mobile ad-hoc network that accredits wireless communication to connect various short range devices. A single hop network called piconet is the basic communication topology of bluetooth which allows only eight active devices for communication among them seven are active slaves controlled by one master. Multiple piconets are interconnected through a common node, known as Relay, to form a massive network called as Scatternet. It is obvious that the performance of Scatternet scheduling is highly dependent and directly proportionate with the performance of the Relay node. In contrary, by reducing the number of Relays, it may lead to poor performance, since every Relay has to perform and support several piconet connections. The primary focus of this study is to observe the performance metrics that affects the inter-piconet scheduling since the Relay node’s role is like switch between multiple piconets. In this paper, we address and analyze the performance issues to be taken into consideration for efficient data flow in Scatternet based on Relay node.

A low mutual coupling design of UWB array

A UWB array antenna with electromagnetic band-gap (EBG) structures is presented in this article. The proposed patch array consists of two identical microstrip-fed monopole antennas. The EBG structures are etched between the radiating elements to enhance the performance of the patch array antenna. The effectiveness of the proposed array with EBG structure has been investigated to that of a conventional UWB array antenna. This approach has been verified by both the simulations and experimental results. The integration of EBG structure has significantly reduced the mutual coupling by more than 15 dB throughout the UWB frequency band. The proposed array is potentially useful for emerging portable UWB devices.

Circuit modeling for UWB-MIMO antenna array

In this article a simple analytical model for a UWB-MIMO antenna is proposed. Lumped equivalent circuit elements are used to construct the proposed MIMO array. Parameters of the circuit elements are calculated from the geometry of the designed antenna. Using frequency transformation technique causes the antenna to have wider impedance bandwidth and compact size. Mutual coupling effect is also taken into consideration for better circuit modeling. The proposed model has been developed using simulations and measurements based techniques. The calculated data are compared with the experimental results and good agreement is noted.