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Communications in Theoretical Physics 2013年第6期59卷 745-750页

作者： T.Akhter m.m.hossain A.A.mamun Department of Physics Jahangirnagar University

Cylindrical and spherical (nonplanar) solitary waves (SWs) and double layers (DLs) in a multi-ion plasma system (containing inertial positively as well as negatively charged ions, non-inertial degenerate electrons, and negatively charged static dust) are studied by employing the standard reductive perturbation method. The modified Gardner (mG) equation describing the nonlinear propagation of the dust ion-acoustic (DIA) waves is derived, and its nonplanar SWs and DLs solutions are numerically analyzed. The parametric regimes for the existence of SWs, which are associated with both positive and negative potential, and DLs which are associated with negative potential, are obtained. The basic features of nonplanar DIA SWs, and DLs, which are found to be different from planar ones, are also identified.

关键词：离子声波稠密等离子体圆柱形时间依赖尘埃球形相对论结构

Application of In-Flight melting Technology by RF Induction Thermal Plasmas to Glass Production

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Plasma Science and Technology 2008年第3期10卷 344-347页

作者：姚耀春 m.m.hossain T.WATANABE F.FUNABIKI T.YANO National Engineering Laboratory of Vacuum metallurgy Kunming University of Science and Technology Kunming 650093 China Department of Environmental Chemistry and Engineering Tokyo Institute of Technology Yokohama 226-8502 Japan Department of Environmental Chemistry and Engineering Tokyo Institute of TechnologyYokohama 226-8502 Japan Department of Chemistry and materials Science Tokyo Institute of Technology Tokyo 152-8550 Japan

An innovative in-flight glass melting technology with induced thermal plasmas was developed for the purpose of energy conservation and environmental protection. Two-dimensional modeling was used to simulate the thermofluid fields in the plasma torch. The in-flight melting behavior of glass raw material was investigated by various analysis methods. Results showed that the plasma temperature was up to 10000 K with a maximum velocity over 30 m/s, which made it possible to melt the granulated glass raw material within milliseconds. The carbonates in the raw material decomposed completely and the compounds in the raw material attainted 100% vitrification during the in-flight time from the nozzle exit to substrate. The particle melting process is similar to the unreacted-core shrinking model.

关键词： induced thermal plasmas in-flight melting plasma heat transfer glass production

Furrow design for improving crop establishment of two-wheel tractor operated strip tillage planters in loam and clay loam soils

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International Journal of Agricultural and Biological Engineering 2021年第3期14卷 130-139页

作者： m.Arshadul Hoque m.m.hossain A.T.m.Ziauddin Timothy J.Krupnik mahesh K.Gathala Senior Scientific Officer FMP Engineering DivisionBangladesh Agricultural Research InstituteGazipur-1701Bangladesh Department of Farm Power and machinery Bangladesh Agricultural UniversityMymensingh-2202Bangladesh International maize and Wheat Improvement Center-Bangladesh Dhaka-1213Bangladesh

Conservation agriculture(CA)based production systems may help in achieving more sustainable intensification of cropping systems that use less labour and energy and have higher profit margins,in addition to soil conservation and environmental impact mitigation *** these objectives can only be achieved when the right mechanization options,including appropriate crop establishment equipment,are in place to assist in timely field *** urgent need exists,therefore,to fine tune and re-adjust the existing two-wheel tractor(2WT)operated seed drills,with specific reference to the design of blade and furrow openers,while at the same time considering performance in different soil types and *** this end,experiments were conducted during 2013-2014 and 2014-2015 at two BARI Regional Agricultural Research Stations in Jamalpur and Barisal,Bangladesh,on a loam and clay loam soil,respectively,to evaluate five types of furrow opener for strip *** and modified shoe-type furrow openers were tested and compared with three inverted-T furrow openers with rake angles of 75°,65°and 55°.The newly designed inverted-T furrow openers were narrower than the shoe-type openers;they also had a longer,hollow shanks and provided better options for adjustment to achieve the desired seeding depth and line *** to shoe-type openers,better seeding depth,uniformity and higher degree of seed coverage were recorded with use of the inverted-T furrow opener with a 65°rake *** resulted in better seed coverage in the furrow,a higher emergence rate index,and the highest emergence percentage of maize and mung *** research findings can be generalized to smallholder production systems on loam and clay loam soils where farmers utilize 2WT operated seed drills for crop establishment in both traditional and conservation agriculture-based planting systems.

关键词： two-wheel tractor strip tillage planter inverted-T furrow opener rake angle conservation agriculture emergence percentage

Enhancement of coercivity,permeability,and dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites for memory and high frequency devices

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Journal of Rare Earths 2024年第6期42卷 1128-1135,I0005页

作者： I.Sardar m.D.hossain m.S.Sikder m.N.I.Khan m.R.Rahman Physics Discipline Khulna UniversityKhulna9208Bangladesh Department of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Department ofComputer Science and Engineering Northern University of Business&Technology KhulnaKhulna9100Bangladesh material Science Division Atomic Energy CentreDhaka1000Bangladesh

Spinel cubic ferrites have huge applications in me mory and high frequency *** the improvement of these modern devices,the magnetic coercivity,permeability,and dielectric properties of a ferrite are the important *** article focuses on improving the magnetic coercivity,magnetic permeability,and dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites,where x=0.00,0.06,and *** X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),field emission scanning electron microscopy(FESEm),energy dispersive X-ray(EDX),vibrating sample magnetometer(VSm),and an impedance analyzer were used to characterize the structural,magnetic,and dielectric properties of the *** XRD patterns indicate the formation of spinel cubic structure of the samples with a secondary peak(EuFeO_(3))for Eu doped *** densities and porosities of the samples follow an inverse trend,where the doped samples’lattice parameters are increased with the increment of rare earth Eu *** FTIR analysis also proves the spinel cubic phase of the *** average grain size of the ferrites is obtained via FESEm images,and it is increased from 121 to 198 *** analysis confirms that doping of the Eu content also changes other hysteresis loop properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ***,the coercivity of the Eu doped samples is greater than that of the mother alloy(x=0.00).The EDX study shows that there is no impurity contamination in the *** permeability and dielectric measurements show an improved quality factor of the Eu-doped samples with low magnetic and dielectric *** dependent resistivity and impedance analysis also show the improved *** the observed properties of the samples,all the investigated ferrites might be strong candidates for potential applications in memory devices,magnetic sensors,and high frequency applications.

关键词： Ferrites Raree arths Coercivity Permeability EDX Resistivity

Radiation effects on opto-electrical properties of polyimide and polyimide fluorocarbon sandwitch polymer film.

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Radiation effects on opto-electrical properties of polyimide...

4th International Symposium on Engineering Plastics

作者： m.m.hossain T.K.Gooder Rojina Akter Department of Applied Physics ＆ Electronic Engineering Rajshahi UniversityRajshahiBangladesh

＜正＞Now a day,polymer is widely used in nano technology in the field of conducting polymer nanowires,encapsulation,nanoelectronics,nanofibers,nanobrushes.A technique for preparing nearly aligned nanotubes from a wid...

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低压等离子体在纺织品整理中的应用

国际纺织导报 2012年第2期40卷 62-64页

作者： m.m.hossain G.Grabher 张婧于萍 Textilveredlung Grabher公司

随着全球竞争的日益激烈,欧洲纺织品行业的诸多部门都面临着多种挑战。等离子体技术作为一种传统纺织品湿加工整理的替代,创造了巨大的机遇。讨论了低压等离子体在纺织品整理中商业应用的可能性。它可有效实施纺织品的表面改性,纺织品... 详细信息

随着全球竞争的日益激烈,欧洲纺织品行业的诸多部门都面临着多种挑战。等离子体技术作为一种传统纺织品湿加工整理的替代,创造了巨大的机遇。讨论了低压等离子体在纺织品整理中商业应用的可能性。它可有效实施纺织品的表面改性,纺织品的表面性能主要取决于所用的混合气体。为了使纺织品表面获得持久亲水性,需要纳米级的涂层。等离子体活化可先于后续的湿加工整理。

关键词：低压等离子体反应器,活化涂层亲水涂层阻燃整理

用于纺织品表面永久改性的工业真空等离子体技术

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国际纺织导报 2016年第5期44卷 46-46,48-50页

作者： R.Alam K.m.G.hossain C.Grabher m.m.hossain 黄明罗艳 Grabher等离子仿生公司奥地利赛发集团瑞士

通过等离子体处理,合成材料(如涂覆聚氨酯的聚酯或聚酰胺)表面的黏附性得以显著提高。研究还表明:通过聚合物和非聚合物形成的气体混合物引入极性基团,可显著改善材料的亲水耐久性;且可聚合性气体,如CH_4,C_2H_2,C_2H_4及其混合物,或诸... 详细信息

通过等离子体处理,合成材料(如涂覆聚氨酯的聚酯或聚酰胺)表面的黏附性得以显著提高。研究还表明:通过聚合物和非聚合物形成的气体混合物引入极性基团,可显著改善材料的亲水耐久性;且可聚合性气体,如CH_4,C_2H_2,C_2H_4及其混合物,或诸如丙烯酸、硅氧烷等一些液体单体,对织物表面永久性亲水、防油和防污改性方面发挥着重要的作用。

关键词：离子体处理纺织品永久改性涂层

Beyond Stitches: Analysis of Disease Burden in a Bangladeshi RmG Factory

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Health 2024年第7期16卷 688-702页

作者： mariam Zaman Tayeb Ahmmed Nabila Binte hossain S. m. Raysul Haque Ariful Islam Joarder Kamran ul Baset Department of Procurement SM Group Dhaka Bangladesh Department of Neurosurgery Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Public Health Independent University Bangladesh (IUB) Dhaka Bangladesh Department of Cardiology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh

Introduction: Bangladesh has experienced remarkable growth in RmG over the past 25 years. With the knitwear industry providing more than 4 million direct jobs, providing better occupational health and safety of workers remains a challenge. Aim of the study: The aim of the study was to analyze the disease burden of a RmG factory, and to highlight occupational health risks. methods: A cross-sectional study design was employed for this analysis. A 17-month data entry (January 2020 - may 2021) was gathered from the factory in-house clinic. The socio-demographic and clinical diagnosis entries of 8421 entries were analyzed. Result: The population of the factory workers is 5370, where 40% (2148) are female workers and 60% (3222) are male workers. The mean age of respondents is 30 years, with a SD of ±7 years. Among the chief complaints, the most common was vomiting (14%;2262) fever (14%;2247), runny nose (11%;1842), cough (9%;1465), and loose motion (8%;1364). In the diagnosis categories, gastrointestinal diseases were more predominantly diagnosed (35%;2978), followed by viral fever (21%;1772), neurological diseases (16.5%;1389) and musculoskeletal disorders (9%;768). The average cost of medicine for each respondent is BDT 36. The factory covered costs of all medication for 99% (8380) of respondents. Only 0.5% (37) was referred to a tertiary hospital for further evaluation. Conclusion: Garments workers suffer mostly from long-term occupational health hazards. Factory owners and policy makers can contribute in various ways to improving primary healthcare options for workers.

关键词： RmG Disease Burden Work Related Disease Communicable Disease Occupational Safety

Impact of Action Observation Therapy along with Usual Physiotherapy Intervention of Individual with Alzheimer’s Disease

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Advances in Alzheimer's Disease 2024年第1期13卷 1-10页

作者： Zahid Bin Sultan Nahid Faruq Ahmed Tuhin Ahammed md Kutub Uddin md Sirazul Islam S m maruf hossain Sajib md Rafiqul Islam Department of Physiotherapy Saic College of Medical Science and Technology Mirpur Bangladesh Department of Physiotherapy Centre for the Rehabilitation of the Paralysed (CRP) Savar Bangladesh Department of Physiotherapy Centre for the Rehabilitation of the Paralysed (CRP) Mymensingh Bangladesh Department of Physiotherapy Centre for the Rehabilitation of the Paralysed (CRP) Mirpur Bangladesh Department of Physiotherapy State College of Health Sciences Dhaka Bangladesh

Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by cognitive impairments in the initial stage, which lead to severe cognitive dysfunction in the later stage. Action observation therapy (AOT) is a multisensory cognitive rehabilitation technique where the patient initially observes the actions and then tries to perform. The study aimed to examine the impact of AOT along with usual physiotherapy interventions to reduce depression, improve cognition and balance of a patient with AD. A 67 years old patient with AD was selected for this study because the patient has been suffering from depression, dementia, and physical dysfunction along with some other health conditions like diabetes and hypertension. Before starting intervention, a baseline assessment was done through the Beck Depression Inventory (BDI) tool, the mini-Cog Scale, and the Berg Balance Scale (BBS). The patient received 12 sessions of AOT along with usual physiotherapy interventions thrice a week for four weeks, which included 45 minutes of each session. After four weeks of intervention, the patient demonstrated significant improvement in depression, cognition, and balance, whereas the BDI score declined from moderate 21/63 to mild 15/63 level of depression. The mini-Cog score improved from 2/5 to 4/5, and the BBS score increased from 18/56 to 37/56. It is concluded that AOT along with usual physiotherapy intervention helps to reduce depression, improve cognition and balance of people with AD.

关键词： Alzheimer’s Disease Action Observation Therapy Physiotherapy Intervention

Comparison of Propofol and Fentanyl for Preventing Emergence Agitation Following Sevoflurane Anesthesia in Pediatric Patients: A Single-Center Study in Bangladesh

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Pharmacology & Pharmacy 2024年第6期15卷 223-235页

作者： md. Saiful Islam Khan md. Abir Tazim Chowdhury Farzana Fardousi munama magdum md. Ahaduzzaman Taneem mohammad Shamima Akter Suriya Akter md. Saiful Islam Azad md. mozaffer hossain m. Abdur Rahman Department of Cardiothoracic Anesthesia Evercare Hospital Dhaka Bangladesh Department of Cardiothoracic and Vascular Surgery Evercare Hospital Dhaka Bangladesh Department of Pathology National Institute of Cancer Research & Hospital Dhaka Bangladesh Department of Preventive and Social medicine National Institute of Preventive and Social Medicine Dhaka Bangladesh Department of Anesthesia Sheikh Sayera Khatun Medical College Gopalgonj Bangladesh Department of Anesthesia Dhaka Medical College Dhaka Bangladesh Department of Anesthesia Combined Military Hospital Dhaka Bangladesh Department of Cardiac Anesthesia National Institute of Cardiovascular Disease Dhaka Bangladesh Department of Anesthesia Bangladesh Medical College Dhaka Bangladesh

Background: Emergence agitation (EA) is a common phenomenon observed in pediatric patients following general anesthesia. This study aimed to assess the efficacy of propofol and fentanyl in preventing EA and to compare their associated complications or side effects. methods: This prospective randomized observational comparative study was conducted at Dhaka medical College Hospital from July 2013 to June 2014. The study aimed to evaluate the effects of propofol and fentanyl on EA in children aged 18 to 72 months undergoing circumcision, herniotomy, and polypectomy operations. Ninety children were included in the study, with 45 in each group. Patients with psychological or neurological disorders were excluded. Various parameters including age, sex, weight, American Society of Anesthesiologists (ASA) class, duration of anesthesia, Saturation of Peripheral Oxygen (SPO2), heart rate (HR), respiratory rate (RR), Pediatric Anesthesia Emergence Delirium (PAED) score, duration of post-anesthesia care unit (PACU) stay, incidence of laryngospasm, nausea, vomiting, and rescue drug requirement were compared between the two groups. Results: Age, sex, weight, ASA class, and duration of anesthesia were comparable between the two groups. Perioperative SpO2 and HR were similar in both groups. However, the PAED score was significantly higher in the fentanyl group during all follow-ups except at 30 minutes postoperatively. The mean duration of PACU stay was significantly longer in the fentanyl group. Although the incidence of laryngospasm was higher in the fentanyl group, it was not statistically significant. Conversely, nausea or vomiting was significantly higher in the fentanyl group. The requirement for rescue drugs was significantly higher in the fentanyl group compared to the propofol group. Conclusion: Both propofol and fentanyl were effective in preventing emergence agitation in pediatric patients undergoing various surgical procedures under sevoflurane anesthesia. However, propo

关键词： Emergence Agitation (EA) General Anesthesia Propofol Fentanyl Pediatric Patients Pediatric Anesthesia Emergence Delirium (PAED) Score Bangladesh