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Search Results: 1 - 10 of 7720 matches for " Md. Atiqur Rahman "
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Longitudinal Wave Propagation in Relativistic Two-fluid Plasmas around Reissner-Nordstrom Black Hole
Md. Atiqur Rahman
Physics , 2010, DOI: 10.1007/s10773-010-0600-2
Abstract: The 3+1 spacetime formulation of general relativity is used to investigate the transverse waves propagating in a plasma influenced by the gravitational field of Reissner-Nordstrom black hole, as explained in an earlier paper, to take account of relativistic effects due to the event horizon. Here, a local approximation is used to investigate the one-dimensional radial propagation of longitudinal waves. We derive the dispersion relation for these waves and solve it numerically for the wave number k.
A Review of the Study on the Electromigration and Power Electronics  [PDF]
Md. Khalilur Rahman, Abul Monsur Mohammed Musa, Budrun Neher, Kawchar Ahmed Patwary, Mohammad Atiqur Rahman, Md. Shariful Islam
Journal of Electronics Cooling and Thermal Control (JECTC) , 2016, DOI: 10.4236/jectc.2016.61002
Abstract: Electromigration is a main challenge in the pursuit of power electronics, because physical limit to increase current density in power electronics is electromigration (EM), whereas much higher electrical current and voltage are required for power electronics packaging. So the effect of EM is an important issue in applications where high current densities are used, such as in microelectronics and related structures (e.g., Power ICs). Since the structure size of integrated circuits (ICs) decreases and the practical significance of this effect increases, the result is EM failure. On the other hand, in the next generation power electronics technology electrical current density is expected to exceed 107 A/cm2 which is another challenge. This review work has been carried out to identify the mechanism of EM damage in power electronics (e.g., pure metallization and solder joints) and also how to control this kind of damage.
Faculty Development in Business Schools: A Global Perspective Vis-?-Vis Bangladesh Scenario
Md Moazzam Husain,Abu Mohammad Atiqur Rahman
Pakistan Journal of Social Sciences , 2012,
Abstract: This study tries to provide an overview of present structure and trend in the development of business school faculty in global perspectives vis-?-vis Bangladesh scenario. It makes an attempt to bring into focus the major strengths and weaknesses that lie embedded in present faculty issues in the business schools of the public and the private universities of Bangladesh. An adequate supply of competent and full-time faculty is an essential condition for the success of any plan for expanding business education. The study, therefore, examines the present supply of full-time faculty, their selection, development, promotion, etc. in the business schools. In addition to the full-time faculty, part-time faculties play a valuable complementary role in business education. The researcher, therefore, includes a short discussion, although in considerably less detail, on part-time faculty in these business schools. The study finally prescribes certain suggestions for making faculty development issues relevant and effective.
The Knowledge, Attitude and Practices regarding HBV Infection of Married Women in the Reproductive Age Group living in different districts of Bangladesh
Md. Atiqur Rahman,Sultan Rokeya Mannan
Medicine Today , 2009, DOI: http://dx.doi.org/10.3329/medtoday.v21i2.12547
Abstract: The present study was conducted to know the knowledge, attitude and practices of 300 married women in the reproductive age group living in different districts of Bangladesh , regarding HBV infection. Only20% of the women were found aware of the mode of transmission of HBV. However, 50% of the women were having the misconceptions regarding mode of transmission of HBV. 4% of women, 30% of children up to 5 years and 15% of children above 5year were fully immunized with hepatitis B vaccine. 80% of children up to 5years and 75% of children above 5 years were fully immunized as per universal immunization Programme. Hence, the results of the study clearly indicated the low immunization programme and this further potentiated the need to grow public awareness about vaccination against Hepatitis B by focusing the beneficial effect of of early immunization through public electronic media.
Handwritten Numeric and Alphabetic Character Recognition and Signature Verification Using Neural Network  [PDF]
Md. Hasan Hasnain Nashif, Md. Badrul Alam Miah, Ahsan Habib, Autish Chandra Moulik, Md. Shariful Islam, Mohammad Zakareya, Arafat Ullah, Md. Atiqur Rahman, Md. Al Hasan
Journal of Information Security (JIS) , 2018, DOI: 10.4236/jis.2018.93015
Abstract: Handwritten signature and character recognition has become challenging research topic due to its numerous applications. In this paper, we proposed a system that has three sub-systems. The three subsystems focus on offline recognition of handwritten English alphabetic characters (uppercase and lowercase), numeric characters (0 - 9) and individual signatures respectively. The system includes several stages like image preprocessing, the post-processing, the segmentation, the detection of the required amount of the character and signature, feature extraction and finally Neural Network recognition. At first, the scanned image is filtered after conversion of the scanned image into a gray image. Then image cropping method is applied to detect the signature. Then an accurate recognition is ensured by post-processing the cropped images. MATLAB has been used to design the system. The subsystems are then tested for several samples and the results are found satisfactory at about 97% success rate. The quality of the image plays a vital role as the images of poor or mediocre quality may lead to unsuccessful recognition and verification.
Scenario of Fine Needle Aspiration Cytology of Neck Masses in a Tertiary Care Hospital
Md Atiqur Rahman,Md Mamun Ali Biswas,Abdul Mannan Sikder
Journal of Enam Medical College , 2011, DOI: http://dx.doi.org/10.3329/jemc.v1i1.11131
Abstract: Background: Masses in the neck are very common and these may range from inflammatory to neoplastic lesions. Fine needle aspiration cytology (FNAC) is a simple, quick and minimally invasive procedure that is well recognized and widely accepted diagnostic tool in separating inflammatory lesions from cystic and neoplastic lesions of the neck. We designed this study in our populations for evaluation of FNAC of different neck masses and that might facilitate the diagnosis and management of these lesions. Objectives: To find out the frequency of different pathological conditions detected on FNAC, to determine the prevalence of neck masses with respect to age and sex and to assert their organs of origin and the nature of the lesions. Materials and Methods: This study was conducted in the Department of Pathology, Enam Medical College, Savar, Dhaka from January 2009 to August 2010. The patients of any age and either sex with neck masses were included. Total 526 patients with neck swellings were included in this study. Among these 60.6% were females and 39.4% were males with male to female ratio of 1:1.54. The age of the patients ranged from 10 months to 85 years with mean age of 32.52 ±17.01 years. Results: Of the 526 cases 341 (64.8%) were from lymph nodes, 127 cases (24.2%) from thyroid glands, 32 cases (6.1%) from salivary glands, 14 cases (2.7%) from cysts and 12 cases (2.2%) from soft tissues. FNAC revealed that 86.2% of the lesions were non-malignant which included 60.5% of inflammatory lesions and 25.7% of other benign lesions. Malignant lesions were found in 8% of cases and 5.9% of the cases were categorized as indeterminate follicular neoplasm of the thyroid gland. Conclusion: Reactive lymphadenitis is the commonest condition in the neck swellings followed by tuberculous lymphadenitis, nodular goiter and malignant neoplasm, especially metastatic carcinoma.
Integrated Water Resources Management (IWRM) Impacts in South West Coastal Zone of Bangladesh and Fact-Finding on Tidal River Management (TRM)  [PDF]
Fahad Khan Khadim, Kanak Kanti Kar, Pronab Kumar Halder, Md. Atiqur Rahman, A.K.M. Mostafa Morshed
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.510098

The south west coastal zone of Bangladesh have been affected by rampant water logging due to vulnerable climate, silted rivers and stumpy terrain; and introduction of IWRM and TRM at some places of the zone has substantially safeguarded the circumstance. This study aims to assess the benefits achieved due to implementation of IWRM in parts of Khulna and Jessore districts, and investigate some technical aspects evolving TRM. Analyses have been carried out using satellite images, RS and GIS technology, Digital Elevation Model (DEM) and field investigations. A mathematical formulation has been made to assess rate of tidal sedimentation due to TRM and selection strategies of tidal basins. The study comes up with evidences of considerable advancements in regional livelihood i.e. flood resistance, cultivated lands, cultivable area, cropping intensities and food security due to IWRM. Moreover, the technical facts established on TRM would help planners to have vivid perception regarding the process.

Recent Unrest in the RMG Sector of Bangladesh: Is this an Outcome of Poor Labour Practices?
Chowdhury Golam Hossan,Md. Atiqur Rahman Sarker,Rumana Afroze
International Journal of Business and Management , 2012, DOI: 10.5539/ijbm.v7n3p206
Abstract: The RMG sector of Bangladesh has experienced disputes and violent protest by the workers in recent times. This study explores the reasons for recent unrest in the garment sector. Since managers are mainly responsible for applying human resource practices, this paper has given particular attention to their views on recent attitude changes of workers. Results show that mutual understanding among workers and managers is absent in the RMG sector. This study also states that high-work load, poor behaviour of line managers, low skills and low wage rates are the notable reasons for high job turnover and social unrest. Poor relationship between workers and supervisors is the main source of conflict. This study finds that there is growing demand for work life balance among the workers of RMG sector.
Health Risk Assessment of Pesticide Residues via Dietary Intake of Market Vegetables from Dhaka, Bangladesh
Md. Shakhaoat Hossain,Md. Alamgir Hossain,Md. Abdur Rahman,Md. Mainul Islam,Md. Atiqur Rahman,Tanveer Mehedi Adyel
Foods , 2013, DOI: 10.3390/foods2010064
Abstract: The present study was designed to assess the health risk of pesticide residues via dietary intake of vegetables collected from four top agro-based markets of Dhaka, Bangladesh. High performance liquid chromatography with a photo diode array detector (HPLC-PDA) was used to determine six organophosphorus (chlorpyrifos, fenitrothion, parathion, ethion, acephate, fenthion), two carbamate (carbaryl and carbofuran) and one pyrethroid (cypermethrin) pesticide residues in twelve samples of three common vegetables (tomato, lady’s finger and brinjal). Pesticide residues ranged from below detectable limit (<0.01) to 0.36 mg/kg. Acephate, chlorpyrifos, ethion, carbaryl and cypermethrin were detected in only one sample, while co-occurrence occurred twice for fenitrothion and parathion. Apart from chlorpyrifos in tomato and cypermethrin in brinjal, all pesticide residues exceeded the maximum residue limit (MRL). Hazard risk index (HRI) for ethion (10.12) and carbaryl (1.09) was found in lady’s finger and tomato, respectively. Rest of the pesticide residues were classified as not a health risk. A continuous monitoring and strict regulation should be enforced regarding control of pesticide residues in vegetables and other food commodities.
Retraction: Adyel et al. Health Risk Assessment of Pesticide Residues via Dietary Intake of Market Vegetables from Dhaka, Bangladesh. Foods 2013, 2, 64–75
Md. Shakhaoat Hossain,Md. Alamgir Hossain,Md. Abdur Rahman,Md. Mainul Islam,Md. Atiqur Rahman,Tanveer Mehedi Adyel
Foods , 2013, DOI: 10.3390/foods2030350
Abstract: The following article [1], doi: 10.3390/foods2010064, website: http://www.mdpi.com/2304-8158/2/1/64, has been retracted by the authors because of some major errors in broad field of pesticide residues identification and concentrations. During random cross check retention time of pesticides by HPLC did not match with the standards of detected pesticides. As a result concentration of all detected pesticides, maximum residue limits (MRLs) and health risk assessments were changed. All these errors made the article [1] as a wrong one. All authors have confirmed that the reported results produced using quite inappropriate procedures. As first author herein, I take full responsibility for the retraction of our experiments and any other errors in its contents, and would like to offer my apologies on behalf of my co-authors to the readership of Foods for any inconveniences caused by this retraction.
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