Roslina Sidek

• Universiti Putra Malaysia

The use of organic thin film transistors (OTFTs) is growing rapidly as an alternative to their inorganic counterparts due to their advantageous properties, such as easy processing and flexibility. The performance of OTFTs is still undergoing improvement and taking this as a recognition, this paper reviews various factors that influence the performa...

Due to the limitations of battery life and capacity, power supply has been the bottleneck for scaling of a wireless sensor network in thousands or millions of nodes. RF energy harvester (RFEH) is a promising solution to power up sensors and wireless devices due to increasing accessibility of RF energy sources, better silicon integration of the harv...

6,13-Bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) films are prepared by spin coating on commercial prefabricated bottom gate-bottom contact (BGBC) configuration organic field effect transistors (OFETs). The commercial prefabricated OFET offers a less time consuming in order to prepare other multilayer compared to custom made prefabricat...

In recent decades, near-threshold voltage (NTV) design has become a well-known technique for improving the energy efficiency of digital integrated circuits. However, scaling down the operating voltage to the NTV raises two major challenges for robust operation: process variability and performance degradation. In this study, we propose a joint optim...

This study focuses on quality in a view of usability on website for Down Syndrome Children (DSC). The website specially designed for children with Down Syndrome to gain benefit and to learn how easy to use the website. This study wants to know how easy of exist website which are focus on DSC and really easy to use with using usability principles: l...

Automotive industry is migrating to electronic based control which has promoted the evaluation and enhancement of engine control performance using electronic components in the research field. Modern engines are controlled by Engine Control Unit (ECU) where not only functions and control systems are in placed, but also the fail-safe mechanisms must...

Test case selection in software testing is one of the process that support to quality in finding bug. Decreasing number of bug may increase quality of software. Many strategies have been proposed by researcher for software testing. Specially to avoid exhausted testing which all the testers take into account which may increase time and performance....

Nowadays, many people use Internet to do online activity. This scenario exposed them to danger in Internet which is phishing attack. In order to solve phishing attack, the anti-phishing solutions are needed. Based on our review, there are still lacks of articles that review on the types of anti-phishing solutions in detail. In this paper, a general...

This paper presents research findings on the application of swarm intelligence techniques in computational intelligence to solve the travelling salesman’s problem. The travelling salesman’s problem finds real-life application in post office mail delivery, school bus routing, delivery of food to home-bound people etc. After a number of experimental...

Power consumption and speed are the main criteria in designing comparator for analog-to-digital converter (ADC). This paper presents an optimized low voltage low power dynamic comparator which is robust to process, voltage and temperature (PVT) variations with adequate speed. The comparator circuit was designed using 0.18µm CMOS technology with low...

This paper aims to study a triple flat-type air coil inductive sensor that can identify two maturity stages of oil palm fruits, ripe and unripe, based on the resonance frequency and fruitlet capacitance changes. There are two types of triple structure that have been tested, namely Triple I and II. Triple I is a triple series coil with a fixed numbe...

Electronics Throttle Control System (ETCS) is the principal electronic unit in all fuel injection engine motorbike, augmenting the engine performance efficiency in comparison to the conventional carburetor based engine. ETCS is regarded as a safety-critical component, whereby ETCS malfunction can cause unintended acceleration or deceleration event,...

A visual driver support system was developed to reduce accidents involving motorcyclist. The system used Matlab software as a platform to detect motorcycle image. The detection system was designed to detect still images and moving objects images for different resolutions. A motorcycle was defined as the target object in this case. The results showe...

In this paper, a low-complexity model is proposed for linearizing power amplifiers with memory effects using the digital predistortion (DPD) technique. In the proposed model, the linear, low-order nonlinear and high-order nonlinear memory effects are computed separately to provide flexibility in controlling the model parameters so that both high pe...

span lang="EN-US">In this paper, a low-complexity model is proposed for linearizing power amplifiers with memory effects using the digital predistortion (DPD) technique. In the proposed model, the linear, low-order nonlinear and high-order nonlinear memory effects are computed separately to provide flexibility in controlling the model parameters so...

This paper reports an embedded system design of a digital signal processing (DSP) unit for an In-situ analyzing of electrochemical data obtained by differential pulse voltammetry (DPV) from a three-electrode cell. The system implements smoothing filter, multiple peak detection and Gaussian distribution algorithms has been developed onto ARM cortex-...

As the main exporter in the oil palm industry, the need to improve the quality of palm oil has become the main interest among all the palm oil millers in Malaysia. To produce good quality palm oil, it is important for the miller to harvest a good oil palm Fresh Fruit Bunch (FFB). Conventionally, the main reference used by Malaysian harvesters is th...

This journal presents an ultra-low-voltage current bleeding mixer with high LO-RF port-to-port isolation, implemented on 0.13 μm standard CMOS technology for ZigBee application. The architecture compliments a modified current bleeding topology, consisting of NMOS-based current bleeding transistor, PMOS-based switching stage, and integrated inductor...

Nowadays, the OFDM support the growing request of higher data rate transportation in both wired and wireless communication. The SLM technique is recognized as one of the most capable methods which are applied in OFDM system in order to reduce the problem of high PAPR. However the major drawback of SLM is transmission of side information which has n...

Among palm oil millers, the ripeness of oil palm Fresh Fruit Bunch (FFB) is determined through visual inspection. To increase the productivity of the millers, many researchers have proposed with a new detection method to replace the conventional one. The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the metho...

Orthogonal Frequency Division Multiplexing (OFDM) systems have a main drawback known as high Peak to Average Power Ratio (PAPR) or Crest Factor (CF). The main PAPR reduction techniques are Partial Transmit Sequence (PTS), Dummy Sequence Insertion (DSI), Selected Mapping (SLM), and the DSI-SLM. In this paper an innovative method known as Optimum Pha...

From the Malaysian harvester's perspective, the determination of the ripeness of the oil palm (FFB) is a critical factor to maximize palm oil production. A preliminary study of a novel oil palm fruit sensor to detect the maturity of oil palm fruit bunches is presented. To optimize the functionality of the sensor, the frequency characteristics of ai...

There is a major problem in orthogonal frequency division multiplexing (OFDM) systems that is known as high peak-to-average power ratio (PAPR), thus various PAPR reduction algorithms have been introduced. Selected mapping (SLM) and Partial transmit sequence (PTS) are two of the most attractive solutions because of their good performance without dis...

Orthogonal frequency division multiplexing (OFDM) is a robust transmission technique to combat the influence of wireless fading channels. However, OFDM suffers from high peak-to-average power ratio (PAPR) that significantly reduces the efficiency of the high power amplifier (HPA). This paper reviews the performance of few PAPR reduction techniques...

A low power low-dropout (LDO) voltage regulator with self-reduction quiescent current is proposed in this paper. This proposed capacitorless LDO for Silicon-on-Chip (SoC) application has introduced a self-adjustable low-impedance circuitry at the output of LDO to attain stability critically during low output load current (less than a few hundred of...

Competence is a very important characteristic to all area of activity, especially in an emergency situation. This is because people must react according to what supposed to do. In particular, if an individual lacking competence in the job or life, the person may take wrong action and make more loss in the area of work or situation such loss of life...

Learning Management System (LMS) is software that has been developed for the administration, documentation, tracking, and reporting the educational resources. Assignment Box Alert (ABA) is a type of LMS which has been developed to manage the student in assignment submission. Before the development of ABA, the submission assignments from the student...

The rapid progress in education impacts the significant requirement to manage the educational globalization resources through the use of modern technology. In addition, an online system is the electronic interactive medium that delivers information to users via telephone lines to personal computers (PCs) or via cables to terminals. This paper prese...

This paper report the development of a prototype model to locate missing people in a location with big crowds such as in Mecca during Hajj time. The prototype integrates the Global Positioning System (GPS) for data transmission and the Global System for Mobile (GSM) network to track missing Malaysian Hajj pilgrims. The prototype is developed using...

High peak to average power ratio (PAPR) is the main drawback of orthogonal frequency division multiplexing (OFDM) systems. Some of the proposed PAPR reduction solutions are dummy insertion (DSI), selected mapping (SLM) and combined DSI-SLM scheme. This paper presents FPGA implementation of DSI-SLM scheme for OFDM signals. The results of the impleme...

Competency is a vital characteristic to all area of action, especially in an emergency situation. This is because people must react according to what they supposed to react. If an individual lacking competence in the job or life, the person may take wrong action and make more loss in the area of work or situation such loss of life, injured, and oth...

Nowadays, people are highly concerned about their health and start to recognize that herbs are one of the beneficial ingredients to spice up their life. But most of them do not know which herb can exactly benefit them or how it looks like. This paper presents the medicinal herbs information system (MHIS) design, which is a web-based application sys...

This paper reports on a study that helps visually-impaired people to walk more confidently. The study hypothesizes that a smart cane that alerts visually-impaired people over obstacles in front could help them in walking with less accident. The aim of the paper is to address the development work of a cane that could communicate with the users throu...

This paper presents a new way of online communications through mobile to web that helps students and lecturers to be always aware of appointments no matter where they are. It contributes to the teaching and learning process, in which communication is made easy using short messaging system (SMS) technology which is called Web-based Student Appointme...

In modern distributed systems, replication receives particular awareness to provide high data availability, reliability and enhance the performance of the system. Replication becomes as significant mechanism since it enables organizations to provide users with admission to current data where and when they need it. Integrated VSFTPD with Read-One-Wr...

During software development, testing is one of the processes to find errors and aimed at evaluating a program meets its required results. In testing phase there are several testing activity involve user acceptance test, test procedure and others. If there is no documentation involve in testing the phase the difficulty happen during test with no sol...

In this paper, an analytical and simulation solution for touch mode Micro-electromechanical systems pressure sensor operating in harsh environment is proposed. The principle of the paper is to design, obtain analytical solution and compare the results with the simulation using finite elements analysis for a circular diaphragm deflection before and...

Recently, fuel price becomes as hot topic and never ending issue especially the demand of fuel is very high. Malaysia Government has stood up in helping citizens by giving certain amount of money per vehicle owner to reduce their burden. However, the solution of reducing the total amount of fuel cost and consumption seems to be more helpful if the...

In this research, we focus on software namely Building Submission Checklist System (BuSCLIS) that has been developed to be use in construction industry. An objective of developing BuSCLI is to simplify the management of submission data of building plan approval through online system for the Local Authority (LA) or State Town and Country Planning in...

Nowadays, the demand of transmitted information over networks increase rapidly and the demand for steady bandwidth seems to be out of control. Particularly organizations need to provide updated data to users that might be geographically remote and handling a vast amount of requested data distributed in multiple sites. Problem statement: Replication...

Power Amplifiers (PAs) are important parts of the transmitters. They amplify the signals that are going to be transmitted. With increasing the input power of the PA, it creates the nonlinearity at the output. The nonlinearity causes out of band distortion and in band distortion. To overcome these effects the power amplifier should be backed off but...

The birth of remarkable advance in the development of computer and hardware in computer world has enables us to access information anytime and anywhere regardless of the geography factor. Therefore, replication in distributed system environment has become increasingly popular due to its high degree of availability, fault tolerance and enhance the p...

Power amplifiers are essential components in communication systems and are inherently nonlinear. The nonlinearity creates spectral growth beyond the signal bandwidth, which interferes with adjacent channels. It also causes distortions within the signal bandwidth, which decreases the bit error rate at the receiver. In digital predistortion system, a...

Software testing is a very important phase of software development to ensure that the developed system is reliable. Due to huge number of possible combinations involved in testing and the limitation in the time and resources, it is usually too expensive and sometimes impossible to test systems exhaustively. To reduce the number of test cases to an...

Significant and urgent requirement to obtain solutions to manage, distribute and access large sets of raw and processed data efficiently and effectively in the emerging distributed systems such as the data grid. Data grid deals with the efficient management, placement and replication of large amounts of data. Nowadays, replication in distributed en...

This paper presents the design and development of Electronic pigeon hole integrated with GSM network to send a notification of any upcoming loaded. The electronic pigeon hole is able to send notification message via short message service (SMS) to the designated user if any new letter is placed in it. The innovation of the electronic pigeon hole cou...

In this paper, we present a webpage that has been developed based on heuristic elements which refer to the International Conference Software Engineering and Computer Systems for requirement. Heuristic and web base method have been applied in this system with combination of PHP language and MySQL as database system. The objective of this paper is th...

In Malaysia, end of the year will have a special day to give award to every student that excellent. However, it is hard to actually access and evaluate students whom will then be called an excellent student. It because in our realtime student who excellent is only excel in academic. This evaluation become a problem because it not balance in our rea...

This paper focus on the development of Expediency Fuel Consumption Cost Simulator (EFCCS). EFCCS is automated software that calculates the total amount of fuel cost for a car to travel based on the distance given, driving speed, weight capacity and current market fuel price cost. This software simulator has been developed by using Visual Basic .Net...

Real time application with replicated data in grid environment has received particular attention for providing efficient access, fault tolerance and enhance the performance of the system. This paper presents the new failure semantic to manage neighbour replication data in distributed environment. The failure semantic classes include the transaction...

In this paper the new digital predistortion technique is introduced. This technique is the combination of two techniques, complex gain predistortion and memory polynomial predistortion. By applying this technique all the memory contents of the power amplifier is suppressed. Simulations and results are examined with mini circuit power amplifier with...

This paper reports on an ongoing study, which solves a problem in notifying passengers about bus schedule at the bus station. This system is called Public Transport Departure and Arrival System (PTDAS), incorporating image recognition through a digital camera which is programmed with MATLAB for automated input module. It starts with analyzing a num...

Software testing is a very important phase of the software development cycle which ensures that the system developed is reliable and acceptable. Optimizing the test suite size of software eliminates the unnecessary cost and resources that are involved in testing. Sometimes it is not possible to exhaustively test any system due to huge number of tes...

Data replication is one of the mechanisms in data grid architecture since it improves data access and reliability. There are many replication techniques exist in distributed systems environment include Read-One-Write-All (ROWA), Branch Replication Scheme (BRS), Hierarchical Replication Scheme (HRS) and our previous Binary Vote Assignment Data Grid...

Replication in distributed environment has become increasingly popular due to its high degree of availability, fault tolerance and enhance the performance of a system. These advantages of replication are important because it enables organizations to provide users with access to current data where and when user needed at anytime or anywhere, even if...

The application of digital predistortion in base band signal is an extended method of amplifier linearization to reduce the Adjacent Channel Interference (ACI) in those systems in which a varying envelope modulation scheme like OFDM and MQAM is used. Digital baseband predistortion is a highly cost-effective way to linearize Power amplifiers (PAs),...

Nowadays, frozen foods are well-known among Malaysia society. This is due to the modern lifestyles which require short food preparing times without neglecting the food nutritious. In supporting this requirement, the manipulation of vending machine is identified as a tool to promote modern and healthy living style, besides to simplify the cooking pr...

Formal Methods are very tough subject to Software Engineering student. It happens because of the mathematics involvement during software development. Students normally feel very difficult to derive formal specification from informal requirement. The problem always happen is to derive the Z notation in the formal specification. The formal specificat...

The ICACTE 2009 was organized to gather members of the international community of Computer Theory and Engineering scientists so that researchers from around the world could present their leading-edge work, expanding our community's knowledge and insight into the significant challenges currently being addressed in that research.

The ICACTE 2009 was organized to gather members of the international community of Computer Theory and Engineering scientists so that researchers from around the world could present their leading-edge work, expanding our community's knowledge and insight into the significant challenges currently being addressed in that research.

This note describes a digital signal processor (DSP) based waveform generator, which can generate a sine wave, up to 24 kHz, a square wave, up to 5 kHz, and a triangular wave, up to 12 kHz. A DSP starter kit with Code Composer Studio has been used in the design of a waveform generator. The waveform generators can also produce periodic arbitrary wav...

A high frequency CMOS variable gain low noise amplifier (VGLNA) constructed based on an induc-tive source degenerated LNA and a cascode current mirror is proposed. The 'variable' concept is to pre-vent the unwanted saturation phenomenon due to large input signal. A cascode current mirror cell which consumes minimal voltage headroom without sacrific...

A high frequency CMOS variable gain low noise amplifier (VGLNA) employing a low voltage cascode current mirror cell is proposed. The 'variable' concept is to prevent the unwanted saturation phenomenon due to large input signal. A design technique based on the proposed low voltage cascode cell consumes minimal voltage headroom without sacrificing th...

A low voltage topology that uses a capacitively coupled resonating element has been introduced using 0.18 mum CMOS technology. The topology utilizes the decoupling scheme to dc isolate circuit elements that are connected in series and share a common dc current. A 5.7 GHz variable-gain low noise amplifier (VGLNA) is presented with simulation results...

This paper presents the design of a universal asynchronous receiver and transmitter (UART), which is fully functional and synthesizeable. Due to its modularity, configurability and extremely compact size, the proposed UART is named as micro-UART and it is ideal for system-on-a-chip (SoC) application. The core is usable as an intellectual property....

In this research, we present the development of Building Submission Checklist System (BuSCLI). The objective of developing BuSCLI is to simplify the management of submission of building plan approval through online system for the Local Authority (LA) or State Town and Country Planning in Malaysia. Besides minimize human contacts thus provide fast,...