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An Overview on the Spinning Triangle Based Modifications of Ring Frame to Reduce the Staple Yarn Hairiness

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Journal of Textile Science and Technology 2020年第1期6卷 19-39页

作者： Md. Khalilur Rahman Khan hosne ara begum Md. Razib Sheikh Department of Textile Engineering Bangladesh University of Business and Technology Dhaka Bangladesh Department of Yarn Engineering Bangladesh University of Textiles Dhaka Bangladesh

Traditional ring spinning system is associated with the several limitations, one of which is yarn hairiness. The awareness has been vibrantly growing among the spinning mills for reducing staple yarn hairiness because of its detrimental effects on the subsequent processes (i.e., weaving, knitting, dyeing etc.) and the quality of resultant textile products. As a result, modified form of ring frame has attracted a lot of attention among the researchers for making yarn with the lower level of hairiness value. Besides the raw material parameters and some processing variables, spinning triangle (ST) is the most critical region that has decisive influence on the distribution of fiber tensions and their spatial orientations and shapes in staple yarn body. Thus, using appropriate methods to control the spinning triangle geometry actively has been a vital issue in the field of yarn hairiness reduction. In this paper, it is attempted to make an overview on the spinning triangle based modifications of ring frame that have been designed and destined to reduce hairiness. However, agent aided ring spinning system has also been briefly discussed in this paper as well.

关键词： Ring Frame Compact Spinning Spinning Triangle Yarn Hairiness

Analysis of the Adsorption of Toxic Chromium (VI) by Untreated and Chitosan Treated Banana and Areca Fiber

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Journal of Textile Science and Technology 2020年第2期6卷 81-106页

作者： hosne ara begum A. K. M. Monjurul Haque Md. Didarul Islam M. Mehedi Hasan Suza Ahmed Md. Razzak Ruhul Amin Khan Department of Yarn Engineering Bangladesh University of Textiles Dhaka Bangladesh Department of Applied Science & Chemical Engineering University of Dhaka Dhaka Bangladesh Department of Fabric Engineering Bangladesh University of Textiles Dhaka Bangladesh Institute of Radiation and Polymer Technology Bangladesh Atomic Energy Commission Dhaka Bangladesh

This paper work involves bunch experiments to investigate the effect of contact time, pH, and adsorbent dose on the extent of adsorption by bio-composites. Adsorption capacity of Chromium (VI) onto chitosan coated with banana and areca fiber was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and adsorbent dose. The chitosan and fibers (banana and areca) were then cross-linked with glutaraldehyde to remove chromium [Cr (VI)] from water via static adsorption. It was found that optimum chromium absorption capacity of chitosan was assessed at pH of 2.5 to 4.5 and contact time of 30 to 180 minutes for raw banana and areca fiber and for chitosan treated banana & areca fiber. Though optimum adsorption of chromium of chitosan was measured 34.17 ppm (85.42%) from a 100 ml solution containing 40 parts per million (ppm) of Cr (VI) at 120 minutes, pH of 3.0 and 120 milligram (mg) adsorbent dose size, use of composite will be more favorable in the point of environmental concern as well as low cost because chitosan preparation is comparatively costly then banana and areca fiber. On the other hand, untreated banana and areca fiber optimum adsorption of chromium measured 3.65 ppm (9.1%) at 180 min and, pH of 4.5 and 140 mg adsorbent dose size and 3.76 ppm (9.4%) at 180 min, pH of 4.5 and 160 mg adsorbent dose size respectively. In case of chitosan treated banana fiber, it was observed that adsorption was increased from 17.664 to 30.057 (75.14%). On the other hand, for areca fiber with chitosan, it was observed that adsorption was increased from 21.664 to 30.156 (75.39%) ppm. The Langmuir and Freundlich adsorption models were used for the mathematical description of the adsorption of chromium ion onto composites and it was found that the Langmuir adsorption isotherm was more fitted models which mean that a monolayer adsorption surface was created. After analyzing from IBM SPSS 25 software, we got the stand

关键词： Adsorption Heavy Metal Chitosan Banana Fiber Areca Fiber Toxicity

Assessing household perception,autonomous adaptation and economic value of adaptation benefits:Evidence from West Coast of Peninsular Malaysia

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Advances in Climate Change Research 2022年第5期13卷 738-758页

作者： Sofia EHSAN Rawshan ara begum Khairul Nizam ABDUL MAULUD Md Shahin MIA Earth Observation Centre Institute of Climate ChangeUniversiti Kebangsaan MalaysiaUKM Bangi 43600Malaysia Centre for Corporate Sustainability and Environmental Finance Macquarie UniversityNew South Wales 2109Australia Department of Civil Engineering Faculty of Engineering&Built EnvironmentUniversiti Kebangsaan MalaysiaUKM Bangi 43600Malaysia School of Economics Finance and BankingUniversiti Utara MalaysiaSintok 06010Malaysia

Climate change is causing sea-level rise,intense and frequent storm surge flooding,and significant shoreline erosion in Malaysian coastal ***,coastal properties,infrastructure,and livelihoods are *** has become apparent that adaptation at the household and community level is necessary to offset the adverse impacts of coastal *** community needs to be made aware of the risks,acquire knowledge about adaptation options,and be empowered to take their own *** perception and preference are therefore crucial for design and implementation of effective planning for climate ***,this study assesses households'perception,adaptation measures and empirically estimates willingness to pay and preference for planned adaptation measures to guide policy instruments through public *** Malaysia,ten highly vulnerable coastal areas in the Selangor coast were surveyed at the household level(n=1016)through face-to-face interviews using a structured *** households’perception and adaptation methods,most of the households in the highly exposed areas perceived less risk of inundation and sea-level rise threat and adopted less proactive adaptation and limited risk reduction behaviours during the extreme *** study found that 66.9%of households were willing to pay for planned adaptation measures despite the limited income capabilities and in favour of moderate adaptation(23.9%).The binomial and ordinal regression results indicated that the probability of willingness to pay for planned adaptation measures significantly increases with age,prior exposure to coastal hazards,awareness,risk perception,community participation,being affected by property damage and loss of income due to extreme *** increased monthly household income and access to telecommunication services,households will probably pay higher for better adaptation measures.A significant amount of perceived yearly adaptation benefits in the coasta

关键词： Risk perception Climate awareness Public engagement Factors affecting adaptation Willingness to pay

Mitochondrial DNA mutations-candidate biomarkers for breast cancer diagnosis in Bangladesh

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Chinese Journal of Cancer 2012年第9期31卷 449-454页

作者： Gazi Nurun Nahar Sultana Atiqur Rahman Abu Din Ahmed Shahinuzzaman Rowshan ara begum Chowdhury Faiz Hossain Centre for Advanced Research in Sciences University of DhakaDhaka 1000Bangladesh Department of Microbiology University of DhakaDhaka 1000Bangladesh Department of Genetic Engineering and Biotechnology University of DhakaDhaka 1000Bangladesh National Cancer Research Institute and Hospital MohakhaliDhaka 1212Bangladesh East West University MohakhaliDhaka 1212Banglades

Breast cancer is a major health problem that affects more than 24% of women in Bangladesh. Furthermore, among low-income countries including Bangladesh, individuals have a high risk for developing breast cancer. This study aimed to identify candidate mitochondrial DNA (mtDNA) biomarkers for breast cancer diagnosis in Bangladeshi women to be used as a preventive approach. We screened the blood samples from 24 breast cancer patients and 20 healthy controls to detect polymorphisms in the D-loop and the ND3-and ND4-coding regions of mtDNA by direct sequencing. Among 14 distinct mutations, 10 polymorphisms were found in the D-loop, 3 were found in the ND3-coding region, and 1 was found in the ND4-coding region. The frequency of two novel polymorphisms in the D-loop, one at position 16290 (Tins) and the other at position 16293 (A-del), was higher in breast cancer patients than in control subjects (position 16290: odds ratio = 6.011, 95% confidence interval = 1.2482 to 28.8411, P = 0.002; position 16293: odds ratio = 5.6028, 95% confidence interval = 1.4357 to 21.8925, P = 0.010). We also observed one novel mutation in the ND3-coding region at position 10316 (A > G) in 69% of breast cancer patients but not in control subjects. The study suggests that two novel polymorphisms in the D-loop may be candidate biomarkers for breast

关键词：线粒体DNA突变生物标志物孟加拉国乳腺癌诊断基因编码区基因多态性 D-loop区

Are gender inclusiveness and rural transformation interlinked?The case of Bangladesh

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Journal of Integrative Agriculture 2024年第6期23卷 2112-2126页

作者： Maria Fay Rola-Rubzen Mohammad Jahangir Alam Jon Marx Sarmiento Ismat ara begum Al Amin Al Abbasi Subrata Saha UWA School of Agriculture and Environment The University of Western AustraliaPerth 6009Australia Department of Agribusiness and Marketing Bangladesh Agricultural UniversityMymensingh-2202Bangladesh Department of Agricultural Economics Bangladesh Agricultural UniversityMymensingh-2202Bangladesh

Gender inclusiveness is important in the rural transformation process of Bangladesh as rural women play key roles in both agricultural and non-agricultural *** inclusiveness also leads to gender *** empirically evaluate relationships between rural transformation and gender inclusiveness in *** consider three rural transformation indicators:high-value commodities’share in agricultural output values,non-farm employment’s share in rural labor employment,and non-agricultural GDP’s share in total *** capturing gender inclusiveness include the per capita rural income of males and females,ratio of investments into gender programs,female access to education,access to healthcare,employment participation,land ownership,and asset *** test the effect of the difference in per capita rural income of males and females and the ratio of their incomes and check for the robustness of the gender variables across different model *** 128 district-level observations from 32 districts of Bangladesh across four time periods(2000,2005,2010 and 2016),we use both ordinary least squares and fixed effects panel regression *** find that female land and asset ownership and access to education and healthcare are robust determinants of various stages of rural ***,our results suggest that improving women’s ownership of land and assets and investing in women’s education and healthcare will likely contribute to a more inclusive rural transformation.

关键词： rural transformation Bangladesh gender inclusiveness investments on women

Gender and rural transformation:A systematic literature review

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Journal of Integrative Agriculture 2023年第12期22卷 3624-3637页

作者： Maria Fay ROLA-RUBZEN Hue T.VUONG Claire DOLL Curtis ROLLINS Jon Marx SARMIENTO Mohammad Jahangir ALAM Ismat ara begum UWA School of Agriculture and Environment The University of Western AustraliaPerthWA 6009Australia Centre of Science and Technology Research and Development Thuongmai UniversityHanoi 100000Vietnam Department of Agribusiness and Marketing Bangladesh Agricultural UniversityMymensingh-2202Bangladesh

Rural transformation can improve poverty reduction,living standards,and health outcomes in developing ***,impacts associated with rural transformation vary by region,household,and individual trait(including gender).While research on rural transformation has been increasing over the last decade,there has been no comprehensive review conducted on the relationships between gender and rural ***,we conduct a systematic literature review to investigate the impacts of rural transformation on gender and the influence of gender inclusiveness on rural *** reviewed 82 studies from 1960-2021 that explore the relationships between rural transformation and *** then developed a framework that captures incidences and flow directions between *** show that most studies examined the impacts of rural transformation on women and between gender *** investigated the role of women and the influence of gender inclusiveness on rural ***,studies showed that rural transformation typically leads to positive outcomes for women regarding employment,income,and ***,negative impacts on women’s control over income,stability of new income sources,and access to healthy food are also *** future development policies and programs to explicitly account for gender inclusiveness can lead to more successful rural transformation.

关键词： gender rural transformation structural transformation women’s empowerment

Trends of dengue infections in Malaysia,2000-2010

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Asian Pacific Journal of Tropical Medicine 2013年第6期6卷 462-466页

作者： Md.Shahin Mia Rawshan ara begum A.C.Er Raja Datuk Zaharaton Raja Zainal Abidin Joy Jacqueline Pereira Institute for Environment and Development Universiti Kebangsaan Malaysia43600UKMBangiSelangor D.E.Malaysia Southeast Asia Disaster Prevention Research Institute Universiti Kebangsaan Malaysia43600UKMBangiSelangor D.E.Malaysia School of Development and Environmental Studies Faculty of Social Science and Humanities Universiti Kebangsaan Malaysia43600UKMBangiSelangor D.E.Malaysia

Objective:To analyze trends of dengue incidences and deaths in Malaysia from 2000 to 2010 as well as the predominant dengue virus serotypes during the last ***:We used the national data on annual reported cases,deaths,incidence rate,mortality rate,and case fatality rate of dengue fever(DF) and dengue hemorrhagic fever(DHF) as well as dengue virus serotypes prevalent in Malaysia during the last ***/ regression lines were fitted to investigate the trend of dengue incidences and deaths due to the disease for a 11-year period(2000-2010).For the distribution of national incidence rate,mortality rate,and case fatality rate of DF and DHF, descriptive statistics using mean and 95%confidence intervals(C/) for means,and range were ***:The number of dengue cases and number of deaths have increased,on average, by 14%and 8%per year *** average annual incidence rate of DF per 100 000 populations was higher as compared to that of ***,the yearly mean mortality rate of DHF per 100 000 populations was greater than that of *** simultaneous circulation of all four dengue serotypes has been found in *** a particular dengue virus serotype predominates for at least two years before it becomes replaced by another ***: The dengue situation in Malaysia has worsened with an increasing number of reported oases and deaths during the last *** increasing trend of dengue highlights the need for a more systematic surveillance and reporting of the disease.

关键词： Dengue Dengue hemorrhagic fever Trend Malaysia

Influence of Ni substitution on structural,morphological,dielectric,magnetic and optical properties of Cu-Zn ferrite by double sintering sol–gel technique

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Journal of Advanced Dielectrics 2019年第2期9卷 63-71页

作者： Mohammad Sajjad Hossain Yeasmin Akter Mohammad Shahjahan Muhammad Shahriar Bashar Mosthosney ara begum MdMoazzem Hossain Suravi Islam Nazia Khatun MdAl-Mamun Industrial Physics Division BCSIR Laboratories Dhaka BCSIRDhaka-1205Bangladesh Department of Physics University of Chittagong Chottogram-4331Bangladesh Institute of Fuel Research and Development BCSIR Dhaka-1205Bangladesh Bangladesh Atomic Energy Centre BAEC Dhaka-1000Bangladesh

Polycrystalline NiCuZn ferrite(Ni_(x)Cu_(0.3)Zn(0.7-x)Fe_(2)O_(4);x=0.2,0.3,0.4 and 0.5)were prepared through solgel auto combustion method applying double sintering ***,morphological,elemental analyses(EDS),Fourier-transform infrared spectroscopy(FTIR),Direct Current(DC)electrical resistivity,dielectric,magnetic and optical properties of prepared samples were *** profiles reveal the formation of simple cubic spinel structure without any traceable *** average crystallite size lies within the range of 22–29 *** parameter decreases with increasing Ni *** temperature DC resistivity was recorded from 6:39×10^(5)to 3:79×10^(5)Ω*** dielectric constant(ε)and loss factor(tanδ)were decreased with increase of frequency while AC conductivity *** absorption peak occurred at three different frequency ranges at 570-577 cm^(-1),1635-1662 cm^(-1)and 3439–3448 cm^(-1).Magnetic properties were investigated by using vibrating sample magnetometer(VSM).Decreasing trends were observed for saturation magnetization(Ms),magnetic coercivity(Hc)and remanant magnetization(Mr)with the increase of Ni *** band gap(-2.70-2.79 eV)were calculated from diffuse reflectance data by using Kubelka–Munk function.

关键词： Sol-gel NiCuZn ferrite FTIR DC resistivity dielectric optical properties

Synthesis,structural investigation,dielectric and magnetic properties of Zn^(2+)-doped cobalt ferrite by the sol-gel technique

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Journal of Advanced Dielectrics 2018年第4期8卷 54-59页

作者： Mohammad Sajjad Hossain MdBadiul Alam Mohammad Shahjahan Most.hosney ara begum MdMoazzem Hossain Suravi Islam Nazia Khatun Mukul Hossain Mohammad Saiful Alam Md.Al-Mamun Industrial Physics Division BCSIR Laboratories Dhaka BCSIRDhaka 1205Bangladesh Noakhali Science and Technology University Noakhali 3814 Bangladesh Daffodil International University Dhaka 1205 Bangladesh Atomic Energy Centre Dhaka Dhaka 1000 Bangladesh

Zinc substituted cobalt ferrite nanoparticles with elemental composition Co_(1-x)Zn_(x)Fe_(2)O_(4)(x=0.0,0.2,0.4,0.6)were prepared by the sol-gel auto-combustion technique using Co,Fe,Zn nitrate as a precursor where nitrates to citrate was 1:*** as prepared powder of cobalt zinc ferrite was sintered at 900○C for 3 ***,morphological,dielectric and magnetic properties were studied by x-ray diffractometer(XRD),scanning electron microscope(SEM),high precision impedance analyzer and vibrating sample magnetometer(VSM),*** peaks obtained from the XRD confirmed samples having crystallite(32–36 nm)single phase inverse spinel structure without any traceable *** parameters were calculated from XRD and it increases with Zn *** revealed irregularly shaped grains(-0.5–0.7μm)morphology with heterogeneous *** dielectric constant(ε′)and dielectric loss(tanδ),have been measured as a function of frequency at room *** dependence of ε′ and tan δ with frequency showed the normal dielectric behavior in accordance with the Maxwell-Wagner type of interfacial polarization and electron hopping change between Co^(2+)and Co^(3+)as well as between Fe^(2+)and Fe^(3+)ions at octahedral sites.

关键词： Solgel cobalt ferrite dielectric magnetic properties.