Sumaiya Kabir, Md. Rezwanul Haque Khandokar, Muhammad Abdul Goffar Khan
Shayban Nasif, Muhammad Abdul Goffar Khan
This paper describes an indigenously developed hands-free wheel chair for physically disabled persons. The proposed device works based on the Head Gesture Recognition technique using Acceleration sensor. Conventional electric powered wheel chairs are usually controlled by joysticks or hand gesture t...
Md. Abdul Malek, Muhammad Abdul Goffar Khan
In this article, a simple 18-pulse star rectifier using two new passive auxiliary circuits at dc link is proposed for reducing the harmonics content in ac line current. The proposed rectifier combines a double-star rectifier and four-tapped interphase reactor (FTIPR) with four diodes. Passive auxili...
Tapash Karmaker, Md. Shamim Anower, Muhammad Abdul Goffar Khan, Md. Ahasan Habib
A new adjustable window function, based on the combination of Blackman Window and Lanczos Window, has been proposed in this paper. The proposed window function is adjustable because its spectral characteristics and shape can be adjusted according to the desire of the designer by varying the controll...
Russel Reza Mahmud, Muhammad Abdul Goffar Khan, S. M. Abdur Razzak
Two square photonic crystal fibers (SPCFs), one made of silica (SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) and the other made of high index lead silicate soft glass (SF57), are numerically analyzed, compared, and proposed in this pape...
Nazia Tasnim, Reefat Inum, Hasneara Khatun, Muhammad Abdul Goffar Khan
A comparative performance study on circular and elliptical shape microstrip patch antennas and their arrays using different feeding techniques at an X band frequency is presented in this paper. The resonant frequency is chosen at 10 GHz which has a variety of application in wireless communication. C...
M. Abdul Goffar Khan, Farzana Nila, Nafisa Tabasaum, Sayma Alam Suha et al.
Polycystic Ovarian Syndrome (PCOS) has become the most common hormonal disease in women who are in their reproductive age. PCOS in women affects the reproductive organs that generate the hormones progesterone and estrogen, which regulate the menstrual cycle. Although there are not that many symptoms...
Md. Abdul Malek, Muhammad Abdul Goffar Khan
This paper proposes a new 36-pulse diode rectifier for harmonic mitigation. The proposed rectifier consists of a parallel 12-pulse diode rectifier and two passive injection circuits. The first injection circuit consists of modified specially tapped interphase transformer (MSTIT) with two additional ...
Kusum Tara, Ajay Krishno Sarkar, Muhammad Abdul Goffar Khan, Jannatul Robaiat Mou
Cardiac disorder leads to abnormal variability in the RR intervals. Hence accurate identification of such beats and pattern recognition are important for effective decision making. In this work, a platform using MATLAB based Graphical User Interface (GUI) is developed for automatic detection of infe...
S. M. Abdur Razzak, Muhammad Abdul Goffar Khan, Yoshinori Namihira, Md. Yeakub Hussain
This paper presents an optimum design for highly nonlinear dispersion managed photonic crystal fibers. The APSS version 2.3 software is used as the simulation tool. According to simulation, an eight-ringed photonic crystal fiber can be designed with a high nonlinear coefficient at 1550 nm of the ord...
Md. Abdul Malek, Muhammad Abdul Goffar Khan, Md Mayenul Islam
This article introduces a delta/fork transformer based 18-pulse uncontrolled star rectifier for large current and low voltage application. The proposed rectifier consists of two 9-pulse parallel connected uncontrolled star rectifier, delta/fork transformer and interphase transformer (IPT). Delta/for...
Md. Hassanul Karim Roni, Muhammad Abdul Goffar Khan
Global climate has gone through a drastic change in the recent few decades. Besides human life it has imposed a great threat on the different industries. One of the major victims of this threat is electric power generation industry. This is what motivates this study to analyze how and to what extent...
Md. Rabi Islam, Md. Fayzur Rahman, Muhammad Abdul Goffar Khan
This paper presents an approach of speech enhancement techniques to improve the performance of the robust speaker identification under noisy environments. Start-end points detection, silence part removal, frame segmentation and windowing technique have been used to pre-process and wiener filter has ...
Russel Reza Mahmud, Muhammad Abdul Goffar Khan, S. M. Abdur Razzak
An octagonal photonic crystal fiber (O-PCF) for numerical structure design and analysis of some particular properties are presented in this paper. The proposed design is suitable for residual dispersion compensation (RDC) with polarization maintaining (PM) applications as it offers extremely high-ne...
Md. Asaduzzaman, Reefat Inum, Md. Sabbir Hossain, Muhammad Abdul Goffar Khan
The paper deals with relative analysis of radiation parameters of various rectangular patch antennas with quarter wave feed line. Star shaped and fan shaped Electromagnetic Band Gap (EBG) are incorporated separately on base plane of each antenna. Resonant frequency apprehended for the designed anten...
Md Mayenul Islam, Muhammad Abdul Goffar Khan, Md. Abdul Malek, Md. Yah‐Ya Ul Haque
This paper presents detailed analysis of an IGBT based AC chopper for RL load to get oscillation free output along with comparative analysis with conventional chopper. Conventional AC chopper controls power flow through one IGBT without mitigating oscillation of the output. The AC chopper with auxil...
Muhammad Abdul Goffar Khan, Md. Abdul Malek, Md Mahmudul Hasan
This paper proposed a new single phase cycloconverter for ac drives. The proposed cycloconverter consists of specially tapped transformer (STT) with four thyristors. STT has three terminals in secondary winding with two different voltage levels. Secondary side of STT is connected to the two back to ...
Md. Abdul Malek, Muhammad Abdul Goffar Khan
In this paper, current injection technique based 36-pulse uncontrolled star rectifier is proposed for large current rating application. The proposed rectifier consists of a new delta/fork conFigure transformer, 18-pulse star rectifier with passive injection circuit at dc link and specially tapped in...
Md. Ahsan Habib, Muhammad Abdul Goffar Khan, Md. Khaled Hossain, Shafaet Ashif Hossain
This paper describes degree of uniformity and electric field intensity in the gap between two electrodes subjected to high voltage which is necessary to study the behavior of insulation for design of high voltage equipments. Here, 3-D arrangements of fictitious charges and contour points in Cartesia...
Md Saiful Islam, Muhammad Abdul Goffar Khan
Insulated Gate Bipolar Transistor (IGBT) based controlled power is widely used in industrial applications recently. The research scope of this paper is to design and implementation of IGBT based cyclo-inverter to produce higher output frequency than input where advanced microcontroller technique was...