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Articles by J. Hossen
Total Records ( 6 ) for J. Hossen
  S. Sayeed , A. Samraj , R. Besar and J. Hossen
  In conjunction with the recent and amazing development of the Internet, online signature verification is being considered with inventive significance. Not only is online signature verification the least controversial of current biometric methods on the market, it is also one of the most acceptable, intuitive, fast and cost effective and operates with compact data. All these factors make it an ultimate solution for document authentication and enterprise workflow. Nowadays, a wide range of equipment is available for digitizing signatures such as palmtop or PDA-type devices, digitizer tablets, pointing devices and smart phones. This paper presents the state of the art in online signature verification. It addresses the most valuable results obtained so far and highlights the most beneficial directions of research to date.
  H. Roshidul , A.R.M. Shariff , B.S. Blackmore , I.B. Aris , A.R.B. Ramli and J. Hossen
  Topological descriptions and maps are key prerequisite to any autonomous machine for successful navigation in unpredictable behavior of environment. It is necessary to consider topological map with metric refines of 9-intersaction model for the movement of the robot and react its environment accurately. The aim of present study was to identify the robotics movement and its behavior using natural language spatial relations to process information for robot without computation failures and communication errors. The similarity measure of geometric interpretation is considered for computation for the movement of robot. The splitting metric concepts are used for robotics movement to determine the appropriate way to divide by line in a region. The 16 different metric parameters for natural-language spatial term are considered to find out the appropriate direction for the robotic movement. So that robot will react with behavior of environment with natural language spatial term. There are 32 natural language spatial terms are found for robotic movement from present study found and finally these natural languages with spatial relationship are deployed for robotics movement. All these natural language spatial terms could be used in any research related to spatial technology especially where autonomous machine is used.
  J. Hossen , S. Sayeed , T. Bhuvaneswari , C. Venkataseshaiah , J. Emerson and Chung Ren Fatt
  In recent years, there has been increasing interest in developing new designs of low cost floor cleaning mobile robots. One of the challenges has been to reduce the number of sensors as it contributes considerably to the cost of the robot. In this study, the design and development of an automated floor cleaning robot which can navigate and clean a floor at the same time is discussed. It involves hardware construction and software implementation. The 2 wheels are centre mounted are used to move the robot in all direction. Electric brush is mounted in front of the cleaning robot to perform the sweep cleaning process and a mini-water pump is installed within the water tank mounted at the back of the cleaning robot to perform the mopping function. A PIC18F46K22 microcontroller and a L293D motor driver are incorporated into the cleaning robot for processing sensors signals and controlling DC motors. The 3 ultrasonic sensors are mounted on the cleaning robot for obstacle avoidance during its navigation. A RF module is installed on the main board to enable wireless control of the robot. Fuzzy logic techniques have been implemented in the control process. A prototype robot was fabricated and tested in a real environment. It has been found that the robot is able to collect hair, dust, small materials and mop the room floor avoiding obstacles during the cleaning process. The proposed method results in a self-navigating obstacle avoiding cleaning robot which is capable of dry and wet cleaning at a lower cost.
  Thangavel Bhuvaneswari , J. Hossen , C. Venkataseshiah and Lee Wei Xiong
  Negligence or failure to detect gas leakage from LPG cylinder in kitchen may lead to dangerous situations. Several accidents due to gas leakage at homes have been reported. A need also exists for early detection of gas level for ordering cylinder refill. The objective of the study is to design and develop a Wireless Sensor Network (WSN) (radio frequency) based gas leakage detection and gas level monitoring for smart and safe home. The system detects the leakage of the LPG and alerts the user using buzzer and LEDs. It continuously monitors the level of the gas present in the cylinder using load sensor and alerts the user when the cylinder level goes <25%. A prototype has been developed for gas leakage detection and level monitoring and tested. The tests results confirmed the satisfactory performance of the system developed. The proposed design ensures safety and prevention of accidents due to LPG leakage in smart homes. This also alerts the consumer when the gas level falls below 25%.
  E. Jose Peeterson , J. Emerson Raja , J. Hossen , M.N. Ervina Efzan and P. Velrajkumar
  This study presents the design of a three-phase buck-type PFC PWM rectifier simulation to step down 7.5 KVA, 400 V line-to-line AC to form a 380 V DC bus. Low power version of the buck rectifier is also implemented in hardware. The buck rectifier circuit topology is adopted by modifying the commonly known current source rectifier. A SVPWM technique called Switching Loss Optimized (SLO) modulation is employed to easily control the rectifier and carryout power factor correction. An input AC filter is designed to reduce THD and at the same time achieve a high leading power factor. An output DC filter is also designed to provide ripple-free constant DC current and voltage. Closed loop control is applied to maintain steady output voltage in the event of disturbances in the AC supply or the load. The circuit is first designed to meet the specifications and then tested using Simulink/Matlab. The finalized design from the simulation is verified by low power hardware implementation.
  G. Ramana Murthy , Ajay Kumar Singh , J. Hossen and P. Velrajkumar
  This study presents the study of electrical characteristics performance of Carbon Nanotube Field Effect Transistor (CNTFET) devices in terms of modulated channel potential, surface potential, threshold voltage, threshold voltage roll-off and Drain Induced Barrier Voltage (DIBL) effect. From the study, it is evident that the modulated channel potential generally falls with drain voltage. The fall becomes steeper for higher intrinsic carrier concentration. Surface potential is suppressed with the channel for larger oxide thickness. Threshold voltage rises sharply when the channel length reduces below 6 nm whereas threshold voltage roll-off is severe for lower oxide thickness. DIBL effect is more predominant for nano-scale devices and becomes severe for larger oxide thickness due to poor coupling between the channel and the gate.
 
 
 
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