The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The purpose of this paper is to investigate the efficiency of AC-DC low voltage rectifier using CMOS technology. The investigation focused on the topology part of the rectifier circuit as part of study for derivation of small signal model in developing regulation control in CMOS converter for low energy and frequency application. The CMOS rectifier circuit was designed and simulated using two PMOS...
This paper discuss about the effect of slot-width in slot-type linear motor. Linear motor is a device that produces linear motion without using any mechanical transmission to convert from rotary motion to linear motion. The main objective of this paper is to investigate the effect of slot-width in slot-type linear motor. The force needs to be maintained for used in food processing application. Besides...
Using the theory derived from the three coupled amplitude equations which frequently used to explain the interaction of the fields in a fiber optical parametric amplifier, the parametric gain was simulated to investigate the influence of fiber parameters to the gain spectrum. Results show that under a certain condition, the selected fiber parameters such as fiber length, pump wavelength, pump power...
In this paper, the device performance in ultrascaled junctionless (JLT) over junction transistor (JT) are investigated using numerical TCAD Atlas 3D simulator software on 10 nm gate length. The main parameters of interest are analogue and radio frequency figure-of-merits. Result shows no significant advantage of JLT for analog and RF applications as compared to normal junction MOSFETs transistor....
The use of flexible materials such as textile, vinyl and flexible polymer as a substrate for designing wearable antenna are becoming very popular. As the antennas are easily exposed to mechanical deformation while being worn by users, the necessity to measure and analyze the effect of the antenna deformation towards the antenna performance and electromagnetic (EM) energy absorbed by the body are increasing...
This paper evaluates the interaction between the human body and dipole antenna in the presence of conductive medical implant. A Voxel body model is exposed to the radiation source at three different frequencies; 0.9 GHz, 1.8 GHz and 2.4 GHz. A conductive bone plate is implanted inside the Voxel body in order to investigate the effect of medical implant on the Specific Absorption Rate (SAR). Results...
Lecturer Promotion Assessment System for Department of Computer Science, Faculty of Science and Technology Defence was built to help the promotion of lecturers featured appraiser to conduct an initial assessment of the eligibility status of lecturers. The lecturer will be treated as eligible, in observation or tidal worth in value that has been set to proceed with the application promotion. It is...
The Motion Detection From The Thermal Video Using Optical Flow Technique was created to study motion detection techniques from thermal video using optical flow. The purpose of this application is to identify which techniques is more effective in detecting motion in thermal videos and to some extent it can drive technological development in the context of image processing. This application is developed...
This research identifies and evaluates the effect of human body and conductive metallic objects in the vicinity of radiation source on Specific Absorption Rate (SAR). The presence of electronic devices in the vicinity of human body especially close to the human sensitive part especially when the antenna is left inside the trousers pocket could allow the radiated electromagnetic wave to penetrate inside...
In this paper, the interaction between a single band textile dipole antenna with human body is examined under several bending conditions. The numerical simulations of the single band 0.9 GHz patch dipole antenna are performed by using Computer Simulation Technology (CST) Microwave Studio. The Finite Integration Technique (FIT) method is utilized to determine the antenna performance. Results have clearly...
This paper presents an evaluation of characteristic frequency features in healthy and diseased ECG via k-NN classifier. Initially, a total of 264 segment samples are obtained for healthy, bundle branch blocks, dysrhythmia cardiomyopathy conditions from the PTB Diagnostic ECG database. The signal is preprocessed to obtain the power spectral density. The characteristic frequency for each segment sample...
This paper presents a technique to reduce torque ripple in a fractional-slot PM brushless machine. A 12-slot/10-pole machine equipped with various stators design is the subject of investigation. A better torque performance at rated condition is desirable when additional permanent magnets are inserted on the stator part. The design optimization process on motor topology is performed in order to obtain...
An investigation of electromagnetic performance on fractional-slot PM Brushless Machines which slot-number and pole-number differs by one using 2-D finite-element analysis is presented. The investigation is motivated by the rise of Unbalanced Magnetic Force (UMF) resulted by asymmetric disposition of phase windings. It can be seen that a significant reduction of UMF is possibly achieved by employing...
This paper presents investigation of electromagnetic performances such as open-circuit flux-density, back-EMF and output torque on two fractional-slot PM brushless machines. Their ratios of slot-number to pole number are similar respectively, i.e. one with slot-number to pole number is differ by one and the other differs by two. Theirs main parameters such as split-ratio, axial length as well as rated...
This paper discusses the simulation and measurement results of Specific Absorption Rate (SAR) due to the presence of common metallic items close to the radiation source. Numerical simulations are performed by using Finite Integration Technique (FIT). A heterogeneous Voxel body model is used in the simulation and has been exposed to a simple λ/2 dipole antenna at three different frequencies; 0.9, 1...
This paper discusses the performance and SAR of dipole textile antenna under different crumpling conditions in the presence of human body close to the radiation source. The numerical simulations of the realistic complex two dimensional crumpling is performed by using Finite Integration Technique (FIT) which is applied in Computer Simulation Technology (CST) Microwave Studio. A realistic heterogeneous...
This paper presents the performance analysis of dualaxis solar tracking system using Arduino. The ultimate objective of this project is to investigate whether static solar panel is better than solar tracker, or the opposite. This project is divided into two stages namely, hardware and software development. In hardware development, five light dependent resistors (LDR) were utilized to capture the maximum...
A directional coupler based on a quarter-wavelength side-coupled ring is presented. Observation on the parameters that control the response of the directional coupler is conducted. While the length of the one-wavelength ring determine the center frequency, the reflection, transmission and isolation characteristics of the coupler can be varied by varying the impedance of the ring elements, which are...
This paper describes the design of a dual band flexible textile antenna with diamond shaped and wider bandwidth. The textile antenna is designed at 2.45GHz and 5.8 GHz Industrial, Scientific and Medical (ISM) band. The conductive copper tape is used as a conducting. In order to enhance flexibility and feel comfortable for user, the denim material is used as substrate material. This work also describes...
In this paper, the interaction between a single band textile antenna with human body is examined. The simulations are performed by means of CST Microwave Studio with a single band 2.4 GHz patch dipole antenna as the radiating source. The effects of bending and different distances from the body are also considered in this study. Results have clearly indicated that the human body has notably shifts...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.