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Analysis and design of steel-concrete composite sandwich systems subjected to extreme loads

Frontiers of Structural and Civil Engineering 2011年第3期5卷 278-293页

作者： kazi md abu sohel Jat Yuen Richard LIEW Min Hong ZHANG Department of Civil Engineering National University of Singapore Singapore

This paper presents the design guide based on analytical,numerical and experimental investigation of Steel-concrete-steel(SCS)sandwich structural members comprising a lightweight concrete core with density ranged from 1300 to 1445 kg/m3 subjected to static,impact and blast *** performance of lightweight sandwich members is also compared with similar members with normal weight concrete core and ultra high strength concrete core(fc=180 MPa).Novel J-hook shear connectors were invented to prevent the separation of face plates from the concrete core under extreme loads and their uses are not restricted by the concrete core *** and punching are the primary modes of failure under static point *** test results show that the SCS sandwich panels with the J-hook connectors are capable of resisting impact load with less damage in comparison than equivalent stiffened steel plate *** tests with 100 kg TNT were performed on SCS sandwich specimens to investigate the key parameters that affect the blast resistance of SCS sandwich *** yield line method is proposed to predict the plastic capacity and post peak large deflection of the sandwich ***,an energy balanced model is developed to analyze the global behavior of SCS sandwich panels subjected to dynamic load.

关键词： blast load composite structure impact load lightweight concrete sandwich plate J-hook connector

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Groundwater arsenic poisoning in a primary educational institution:health risks to school-going children

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Acta Geochimica 2022年第6期41卷 1069-1082页

作者： md.sohel Rana md.Jahangir Alam mdabu Musa Sazal Kumar md.Aminur Rahman Zonal Laboratory Department of Public Health Engineering(DPHE)RangpurBangladesh Department of Chemistry Carmichael CollegeRangpurBangladesh Department of Applied Chemistry and Chemical Engineering Islamic UniversityKushtia7003Bangladesh School of Environmental and Life Sciences The University of NewcastleCallaghanNSW2308Australia Global Centre for Environmental Remediation(GCER) College of EngineeringScience and EnvironmentThe University of NewcastleCallaghanNSW2308Australia Zonal Laboratory Department of Public Health Engineering(DPHE)Jashore-7400Bangladesh

This study aimed to estimate arsenic(As)and iron(Fe)content in tubewell water(n=58)in primary educational institutions and subsequently assess the health risks to school-going *** described that the As concentration ranged between 0.002 and 0.994 mg L^(-1)with an average value of 0.044 mg L^(-1);which exceeded the World Health Organization(WHO)provisional guideline value of 0.01 mg L^(-1).Similarly,the Fe content varied from 0.05 to 10 mg L^(-1)averaging to 2.84 mg L^(-1).Samples of 55.17%contained a greater As concentration than0.01 mg L^(-1)and 18.97%greater than Bangladesh drinking water quality(BDWQ)standard of 0.05 mg L^(-1),***,75.86%of samples contained a higher Fe concentration than the maximum Bangladesh permissible limit of 1 mg L^(-1).Health risk assessment indicated that girls are more vulnerable than boys *** average hazard quotients(HQs)for As intake through drinking water were 6.01±17.85 and 7.41±22.03 for boys and girls,respectively,implying non-carcinogenic health risks to both *** HQs for Fe intake were less than threshold value of 1 indicating no health issues may arise from Fe intake ***,consumption of As and Fe may trigger health risks to students as indicated by the hazard index(HI),which was higher than *** average cancer risk(CR)values for both boys(0.0027±0.008)and girls(0.0033±0.0099)exceeded the threshold limit of 10-6-10-4,suggesting a possibility of lifetime cancer risks to the school-going ***,school authorities should find alternative ways to ensure safe drinking water for school-going children to avoid possible cancer and non-cancer health risks through consumption of As-poisoning water.

关键词： Arsenic Iron Human health risks Groundwater

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TQM in Higher Education:A Search for New Insight

TQM in Higher Education:A Search for New Insight

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作者： abu Saleh md.sohel-Uz-Zaman Ahmed Imran Kabir abu Rashed Osman School of Business and Economics United International University

The number of higher education institutions,particularly universities,both public and private,has been enormously increased in *** the significant growth in number,there is an increasing concern for quality education in these higher education *** order to address this concern,a number of scholars believe that Total Quality Management（TQM） can be an effective ***,there is a doubt to the extent to which it（TQM） will be applicable in higher education as it was originally developed for the manufacturing *** due course of evolution,TQM is now a well-accepted philosophy in service *** education is within the service sector,therefore,it can be assumed that it could play a vital role in assuring quality in higher *** prime objective of this paper is to assess the potentials of TQM in improving and assuring quality in higher education and to develop general guidelines by highlighting key issues for quality *** and information for this qualitative paper have been collected through literature search,policy document analysis,expert interview,and personal *** is expected that the findings of this study would be able to offer a thoughtful insight regarding the applicability of TQM in higher education in a developing country context like Bangladesh.

关键词： Total quality management Higher education Quality assurance

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COVID-19 Disease Complicated with Severe Pneumonia in a Patient with End Stage Renal Disease (ESRD): A Case Report from Bangladesh

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Advances in Infectious Diseases 2020年第3期10卷 101-109页

作者： md. Reaz Uddin Chowdhury kazi Shanzida Akter Muhammad Zahangir Alam Muhammad Anwarul Kabir Sahedul Islam Bhuiyan Arifa Akram sohel Rahman Abdul Malek Ukil Medical College Noakhali Bangladesh Dedicated COVID-19 Hospital-Trauma Center Feni Bangladesh Brahmanbaria Medical College Brahmanbaria Bangladesh National Institute of Laboratory Medicine and Refferal Center Dhaka Bangladesh Institute of Epidemiology Disease Control and Research Dhaka Bangladesh

Background: Since 2019, the pandemic of Coronavirus disease 2019 (COVID-19) has spread very rapidly in China and Worldwide. COVID-19 is a highly contagious, infectious and rapidly spreading viral disease with an alarming case fatality rate up to 5%. Case Report: In this article, we report a case of 60 years old non diabetic, hypertensive woman infected with COVID-19 who has end stage renal disease (ESRD) on hemodialysis for last 18 months. COVID-19 patients with ESRD need isolation dialysis but most of them cannot be handled properly due to limited hemodialysis machine. With these unavailability and risk, we continue the treatment along with hemodialysis for controlling uraemia and fluid balance. With all effort this patient ended with an uneventful course with clinical improvement, improvement of all laboratory parameters and resolution of radiological findings but follow up RT-PCR cannot done due to changing guideline of discharge criteria of COVID-19 patient in Bangladesh.

关键词： ESRD Hemodialysis COVID-19 Pneumonia Corona Virus

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Evaluation of Lipid Profile in Obese and Non-Obese Hypertensive Adult Patients Attended in Medicine Department of a Medical College Hospital of Bangladesh

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World Journal of Cardiovascular Diseases 2020年第8期10卷 520-544页

作者： md Reaz Uddin Chowdhury kazi Shanzida Akter Sahedul Islam Bhuiyan Mainuddin sohel Mahbub Majumder Arif Mohammad Sohan Mahfuzur Rahman Muhammad Anwarul Kabir Zaman Ahmed Abdul Malek Ukil Medical College Noakhali Bangladesh Trauma Center Feni Bangladesh Brahmanbaria Medical College Brahmanbaria Bangladesh Cumilla Medical College Cumilla Bangladesh Ad-Din Akij Medical College Khulna Bangladesh

Background: By the dawn of this modern era of science, the prime challenge of physician is cardiovascular disease (CVD). The most important modifiable risk factors of CVDs are unhealthy diet, physical inactivity and tobacco use. The effects of unhealthy diet and physical inactivity include abnormal blood lipid, obesity and hypertension. We tried to evaluate and correlate the pattern of lipid profile in obese and non-obese hypertensive patients. Objectives: This study was conducted at medicine department of Cumilla Medical College Hospital. The principal aim was to evaluate the lipid profile in obese and non-obese adult hypertensive patients. Methodology: During this cross sectional analytical study, a total of 100 adult hypertensive patients were taken by purposive sampling. Among them 50 (group 1) patients were taken those were obese and 50 (group 2) patients taken those were non-obese according to BMI measurement on operational definition. Diagnosis of hypertension would be established with the help of ambulatory BP measurements two occasions few minutes apart. The staging of hypertension was done according to JNC7 Criteria. Morning blood samples were taken after 8 - 12 hours of fasting and lipid profiles were done on authentic laboratories. The laboratory values were interpreted according to the operational definition of dyslipidaemia. The ethical research and review committee approved the study protocol and signed informed consent was obtained from the participants. The statistics was analyzed using the IBM SPSS software of version 19.0. Statistical significance was set at p Results: Among the two groups, there were 56 (56%) males and 44 (44%) females. The mean age of group 1 (46.10 ± 11.09) was compared to that of group 2 (

关键词： Lipid Profile Dyslipidaemia Obese Non-Obese Hypertension

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COVID-19 Disease Complicated with Severe Pneumonia in a Patient with End Stage Renal Disease (ESRD): A Case Report from Bangladesh

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Advances in Infectious Diseases（传染病进展） 2020年第3期

作者： md.Reaz Uddin Chowdhury kazi Shanzida Akter Muhammad Zahangir Alam Muhammad Anwarul Kabir Sahedul Islam Bhuiyan Arifa Akram sohel Rahman

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Evaluation of Lipid Profile in Obese and Non-Obese Hypertensive Adult Patients Attended in Medicine Department of a Medical College Hospital of Bangladesh

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World Journal of Cardiovascular Diseases（心血管病） 2020年第8期

作者： md Reaz Uddin Chowdhury kazi Shanzida Akter Sahedul Islam Bhuiyan Mainuddin sohel Mahbub Majumder Arif Mohammad Sohan Mahfuzur Rahman Muhammad Anwarul Kabir Zaman Ahmed1

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