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Mobile users can move between the different wireless networks because several heterogeneous wireless networks are deployed and can be used in a small area. So there need vertical handover issues in an effective manner. This paper proposed two vertical handover scheme based on fuzzy interference system and subtracting clustering method in a heterogeneous environment and simulates to verify performance...
A Microcontroller based power factor correction (PFC) converter is proposed, which is not affected by harmonic distortion in current and voltage wave shapes. This paper describes the design and simulation of a single-phase PFC converter using Atmel's AVR Microcontroller. It involves sensing and measuring the power factor from the load using ADC; implementing faster algorithm to process the data using...
In the last decade, a good number of supervised learning algorithms have been introduced by the intelligent computational researchers in machine learning and data mining. Recently research in classification problems to reduce misclassification rate focuses on aggregation methods like Boosting, which combines many classifiers to generate a single strong classifier. Boosting is also known as AdaBoost...
A compact patch antenna is proposed and simulated in this paper. The proposed antenna comprises of a rectangular patch section with cut off from top corners, slot on the patch and a coplanar waveguide (CPW) feed line for excitation to achieve wideband frequency range. The performance of the compact coplanar antenna under different bending conditions is described in this paper. The proposed antennas...
This research paper carries out a proposal to implement an efficient way to electrify the streets of Dhaka, the capital of Bangladesh, using solar power. Recently, government has launched a project named “Solar Photovoltaic-Powered LED (Light Emitting Diode) Street Lighting” to electrify the streets of Dhaka using only solar panels. Under the prevailing project, 122 LED lights, each of 30W are installed...
This paper presents a comparison between two blind signature (BS) schemes to conduct the simulation of a traditional BS based electronic voting system (EVS). A BS scheme is a cryptographic protocol that plays a vital role to conduct the electronic transactions of privacy-related applications securely but anonymously. It ensures the confidentiality of the private information of a user while she involves...
This paper presents details of a coupled Schrödinger-Poisson solver for modeling I-V characteristics of graphene nanoribbon field-effect transistors (GNR-FET). Poisson solution is obtained using a three-dimensional finite difference algorithm. The Schrödinger solution is implemented by the scattering matrix method which results in spatially unbounded wavefunctions, defined on the nanoribbon surface,...
Changing the appearance of human gait due to the clothing variations makes the gait recognition problem much harder. In this paper, we study the gait signature by dividing the human body into very small fragments and investigate the effectiveness of these fragments when it combines one after another in step-wise. It has been demonstrated that dynamic parts shows more uncertainty thus for more informative...
Group Search Optimizer (GSO) is a population based optimization technique on the metaphor of producer-scrounger which is based on social behavior of animals where producer searches for finding foods and scrounger searches for joining opportunities. GSO has found as an efficient method for solving function optimization problems for which it modeled. Originally it was implemented for single producer...
An Optimized dispersion shifted fiber with simple and specific fiber profile is introduced. According to the results of dispersion, attenuation, mode field diameter, microbending loss, splice loss for such fibers are presented and compared to the alternate designs. This detailed design and outputs helps an individual to understand the principles of dispersion shifting and profile optimizing.
Classification of imbalanced data represents a challenging task in machine learning, as most classification algorithms tend to bias towards the majority class, while often correctly identifying minority class instances is of greater importance. Consequently, there is a need for methods that provide improved accuracy for the minority class without sacrificing overall performance. Ensemble classification...
When breast is subjected to compression, its tissues are deformed according to the elasticity distribution inside the breast and the pressure distribution on the breast surface. If multiple 3D digital breast tomosynthesis (DBT) are taken with different compressing force, the deformation information of the compressed breast can be estimated. Tumor tissues, which are known to be much stiffer than normal...
Heart rate of a human body can be measured considering the change of blood volume in fingertip using microcontroller based methods. In this paper, a low cost and portable method is proposed and implemented to measure heart rate from fingertip using the microphone port of a computer. The method detects the volume change of blood by an optical sensor based on infrared technology. The noisy output signal...
Electrocardiographic ECG gives the electrical activity of the heart captured over time by an external electrode attached to the skin. The proper processing of ECG signal and its accurate detection is very much essential since it determines the condition of the heart. ECG consists of various noise such as baseline wander, power line interference and muscle noise etc. The wavelet transform is a useful...
A three dimensional model of SOI p-channel four gate transistor has been developed using device simulator Silvaco/ATLAS. Threshold voltage for the device is studied for different biasing condition at the four gates and different physical parameter like channel length. The results are compared to the results obtained from the analytical model of threshold voltage of n-channel four gate transistor to...
The state-of-the-art embedded systems are adopting multicore processors as multicore architecture provides high performance and better supports for computation intensive applications. Although cache improves the overall performance, designing multicore embedded systems with multilevel caches is a great challenge. Caches make thermal constraint crucial; parallel thread execution difficult; and timing...
This paper presents the design of a modified rectangular microstrip patch antenna for quad band applications specially for C-band, X-band, Ku-band and K-band applications. The antenna is simulated using the commercially available software General Electromagnetic Solver (GEMS) simulator and MATLAB. Quad band is achieved using six vertical slits in the rectangular patch and feeding with microstrip feed...
The aim of this work is to control the length of the substrate, which is covered by ZnO thin films by using a cost effective automatic sol-gel process. In conventional sol-gel process dipping and withdrawing is done manually, which can create vibration in the substrate while withdrawing/dipping. As a result the interference fringes will not remain constant and films thickness will be non-uniform....
In the coming of era the digitized image is an important challenge to deal with the storage and transmission requirements of enormous data, including medical images. Compression is one of the indispensable techniques to solve this problem. In this paper, we propose an algorithm for medical image compression based on lifting base wavelet transform coupled with SPIHT (Set Partition in Hierarchical Trees)...
The paper presents a simple design and implementation of a Motion sensor. It enables to detect the movement of any things near the circuit. An Infrared sender and Infrared receiver is used. Infrared transmits a signal when circuit is ON and Infrared receiver receives signal when any things move around the Infrared sender.
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