Universiti Teknikal Malaysia Melaka: UTeM Open Journal System
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Design, Fabrication and Control of Upper Limb Rehabilitation Robot Prototype for Stroke Patients
No full textStroke is one of the prominent causes of disability in the world. In order to have chances for recovery, the stroke patients need repetitive and consistent rehabilitation activities or treatment. However, the increasing number of stroke patients with limited number of therapist and transportation problem for rural patients limits the possibility to have better treatment. This paper discussed the application of robotics system to support the rehabilitation activities focusing on the upper limb area of the body. The result shows two designs of upper limb rehabilitation device were fabricated and controlled. Both prototypes were emphasized on the compact, transportable/portable and simple operation concept. In order to evaluate the prototype, real patient test or experiment needs to be conducted
INFLUENCE OF DEPOSITION TIME ON ELECTRODEPOSITED NICKEL SELENIDE (NiSe2) THIN FILMS FOR SOLAR/PHOTOELECTROCHEMICAL CELLS
No full textThe present study investigates the role of deposition time on the structural, morphological, compositional, optical and semiconducting properties of electrodeposited NiSe2 thin films. Nickel Selenide (NiSe2) is a transition metal chalcogenide material suitable for its good chemical and optical properties. The films were deposited on Indium Tin Oxide (ITO) coated conducting glass substrates at deposition times between 10 – 30 minutes with the interval of 5 minutes. The structural analysis of the films reveals the polycrystalline nature with sharp and high intense peaks. Scanning electron micrographs (SEM) reveals that grains are in spherical shape, uniform and pin-hole free. Composition analyses through energy dispersive X-ray (EDX) studies confirm the presence of Se and Ni to its stoichiometry. The observed direct bandgap films reduced their energy gap values from 1.30 to 1.15 eV as the deposition time increases found by optical studies. Heat treatment of these films is annealed at 200◦C for 1 hour yield the high crystallinity that also confirms by X-ray diffraction. Annealed films with longer deposition time of 30 minutes shown cracks in the surface observed by SEM. The energy gap reduced in 20% for the annealed films. This investigation confirms that the deposition time has greater influences for the grown films.
RF/Analog Performances Enhancement of Short Channel GAAJ MOSFET using Source/Drain Extensions and Metaheuristic Optimization-based Approach
No full textThis paper presents a hybrid strategy combining compact analytical models of short channel Gate-All-Around Junctionless (GAAJ) MOSFET and metaheuristic-based approach for parameters optimization. The proposed GAAJ MOSFET design includes highly extension regions doping. The aim is to investigate the impact of this design on the RF and analog performances systematically and to show the immunity behavior against the short channel effects (SCEs) degradation. In this context, an analytical model via the meticulous solution of 2D Poisson equation, incorporating source/drain (S/D) extensions effect, has been developed and verified by comparing it with TCAD simulation results. A comparative evaluation between the proposed GAAJ MOSFET structure and the classical device in terms of RF/Analog performances is also investigated. The proposed design provides RF/Analog performances improvement. Furthermore, based on the presented analytical models, Genetic Algorithms (GA) optimization approach is used to optimize the design of S/D parameters. The optimized structure exhibits better performances, i.e., cut-off frequency and drive current are improved. Besides, it shows superior immunity behavior against the RF/Analog degradation due to the unwanted SCEs. The insights offered by the proposed paradigm will help to enlighten designer in future challenges facing the GAAJ MOSFET technology for high RF/analog applications
Heart rate monitoring using ARM Soft Core Processor based System-on-Chip
No full textData acquisition systems are used for data or signal monitoring in many applications. In the biomedical field, signals such as from an ECG, EEG or PPG are monitored using data acquisition systems. A review of several ARM processor-based data acquisition systems for biomedical applications is presented here. A new ARM processor-based system-on-chip architecture is presented for heart rate monitoring applications, which is implemented in Altera Cyclone II FPGA. A PPG-based sensor is used to carry out heart rate monitoring. An experiment is carried out to verify the functionality of the system by monitoring the heart rate of a student. Based on the results, the monitored heart rate is within the average range for heart rate. According to the compilation report, the total logic elements used were 4740, and the total power estimated for the system in Cyclone II FPGA is 199.59mW
WebGIS Application of Geospatial Technology for Tourist Destination in Malang
Get PDFTourism is a place of relaxation for people in which they can plan their sights based on Information. GIS-based information is increasingly important among tourists as it allows them to get to know places, and this has a deep appeal for travel planning. Malang is a famous tourist destination in Indonesia. The region is visited by a large number of tourists from various parts of the world each year. The number of tourists visiting Malang from year to year is always increasing by considering the number of tourism potential in Malang. However, in the absence of a Tourist Information System, tourists face various difficulties in finding various tourism information. Geospatial technology has changed every area of life and the tourism industry cannot be excluded. The purpose of this research is to develop an interactive and easy-to-use Geographic Information System (GIS) that enables tourists to get information about tourism objects. This research actively demonstrates the potential application of geospatial technology to explore tourist destinations with some detailed information
A Graduation Certificate Verification Model via Utilization of the Blockchain Technology
No full textThe graduation certificates issued by universities and other educational institutions are among the most important documents for graduates. A certificate is a proof of a graduate’s qualification and can be used to apply for a job or other related matters. The advance of information technology and the availability of low-cost and high-quality office equipment in the market have enabled forgery of important documents such as certificates, identity cards, and passports. However, verification of certificates using traditional methods is costly and very time-consuming. Therefore, the goal of this paper is to propose a theoretical model that can offer a potential solution for academic certificate issuing and verification using blockchain technology. The blockchain technology contains several functions including hash, public/private key cryptography, digital signatures, peer-to-peer networks and proof of work. The model uses various elements to formulate the block which is divided into two main processes, namely issuing a digitally signed academic certificate and verifying the academic certificate. The proposed model showed that academic certificate authentication could leverage the blockchain technology. It meets all the conditions necessary for a modern academic certificate verification system. In addition, it closes the gaps and challenges in the existing methods to verify academic certificate authenticity
Implementation of Continuous Wearable Low Power Blood Glucose Level Detection using GSR Sensor
No full textDiabetes Mellitus is one of the most common lifethreatening diseases in the world. The aim of this project is to implement a low power wearable system for continuously monitoring the glucose level in human blood by using GSR sensor. The development of non-invasive blood glucose level detector is desired to replace the invasive method which is inconvenient and expensive. This project is successfully detected by the GSR value and establishing a correlation between GSR and the blood glucose level. It is clearly demonstrated that GSR can be useful in assisting in determining the blood glucose level as an alternative method for the non-invasive approach. A correlation of 65.73% was found from the result and a threshold of (+-2V) for GSR data and it is identified for the end user to alert their blood glucose level. However, there are some factors such as dynamic movement, temperature and calories burnt might affect the accuracy and precision of the prototype
A New Consistency Validation Approach to Enhance the Quality of Functional Security Requirements for Secure Software
Get PDFQuality security requirements contribute to the success of secure software development. However, the process of eliciting security requirements is tedious and complex. It also requires requirements engineers to have security experience in the process of eliciting consistent security requirements from the clients-stakeholders. Most of the requirements engineers faced problems in eliciting consistent security compliance requirements from the clients-stakeholders as they misunderstood the real needs and the security term used. Thus, this resulted to inconsistent security requirements being elicited. The inconsistency leads to incorrect and insecure software systems being developed as well as to disruptions of schedule and increase of a project's expenditure. Motivated by these problems, this study is aimed to propose a new approach for consistency validation of functional security requirements. Here, security requirements specifications will be collected from software vendors to analyse the flow of functional security requirements process. Next, visual differencing will be integrated to cross-validate the consistency of the elicited functional security requirements with the best-practise template. Here, security requirements best-practice template pattern library will be designed and a new mathematical formulation that defines the consistency validation rules of security requirements will also be constructed. The formulation will be based on the security-related semi-formalised model, called SecEssential Use Case (SecEUC).This approach will then be realised with a proof of concept prototype tool and will be compared with the existing approaches, focusing on its ability to validate the inconsistency of the functional security requirements. Finally, this study is believed could provide a positive impact to the software industry by reducing the development cost as it allows the requirements engineers to validate the inconsistency that occurs in the elicited security compliance requirements at the early stage of the secure software development
The Circularly Polarized Corner-Truncated Rectangular Patch Antenna with Double Slits for UHF RFID System
Get PDFThis paper presents a circularly polarised rectangular patch antenna for ultra-high-frequency (UHF) radio frequency identification (RFID) applications using for Thailand standard. The antenna consists of a corner-truncated patch with double slits and a ground plane. The rectangular patch is fed by a single probe. The circular polarisation can be achieved by using three techniques such as adding double slits, using square shape and using a slanted cutting corner. The antenna has a compact size and appropriate for RFID system of Thailand standard. The measurement results show that |S11| (dB) is less than -10 dB. The antenna gain is 8.83 dBic with the unidirectional radiation pattern. The 3-dB axial ratio beamwidth is 65º over the frequency band of 914.4 - 929.9 MHz covering the UHF RFID applications for Thailand standard
3D Platform Simulator Design Using Discrete Multi-Piston Actuators
Get PDFGenerally, 3D simulator uses continuous feedback control system to control their actuator states. The objective of this article is to control the movement of actuators in compliance with 3D position required by simulator. This research uses discrete actuator for 3D simulator with four actuators that is open-loop controlled using Neuro-fuzzy control system. The actuator possesses linear pneumatic actuator with three pistons inside where each piston has independent intake. With the proposed design, the actuator able to give degree of discrete not only two (binary) values but also 26 combinations of discrete values. The 3D simulator proposed in this research have four actuators and two passives like-actuator. This configuration gives 4 degrees of freedom of platform movement. Applying force to the actuator using discrete output controller make possible to get more precise in terms of control and movement of the simulator that very useful for many force control applications