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Plasma polymerized acetylene deposition using a return corona enhanced plasma reactor

Plasma Science and Technology 2017年第8期19卷 90-96页

作者： rokibul islam Shuzheng XIE Karl R ENGLUND Patrick D PEDROW School of Electrical Engineering and Computer Science Washington State University Composite Materials and Engineering Center Washington State University

A corona based weakly ionized plasma source was developed to deposit plasma polymerized acetylene coating at atmospheric pressure. The plasma source included a distinctive point-topoint geometry consisting of an array of high voltage needles and an array of protrusions placed over a grounded screen. The geometry facilitated various corona discharge modes that included return corona to contribute plasma polymerized acetylene deposition downstream from the corona section. Scanning probe techniques were used to investigate deposition on both the leading surface and the trailing surface of substrates. Deposition was initiated as distinct nodules that merged to form a thin plasma polymerized coating.

关键词： acetylene corona return nodules downstream initiated weakly nucleation resistive sized

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Endoscopic third ventriculostomy in children:problems and surgical outcome:analysis of 34 cases

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Chinese Neurosurgical Journal 2021年第2期7卷 137-142页

作者： Md Moshiur Rahman S.I.M.Khairun Nabi Khan Robert Ahmed Khan rokibul islam Mainul Haque Sarker Neurosurgery Department Holy Family Red Crescent Medical CollegeDhakaBangladesh Neurosurgery Department Bangabandhu Sheikh Mujib Medical UniversityDhakaBangladesh

Background:Endoscopic third ventriculostomy(ETV)has been established as a viable treatment option for obstructive hydrocephalus of children over 6 weeks of *** in pediatric groups may be unsuccessful due to the failure of absorption of cerebrospinal fluid(CSF)or reclosure of ventriculostomy stoma or due to *** exact cause is still *** issues like failure to eliminate the second membrane during the procedure or formation of the new arachnoid membrane at the stoma are still not *** study aims to assess the surgical failure of ETV and its predisposing ***:Thirty-four pediatric patients with hydrocephalus were analyzed *** patients’age limit was between 2.5 months and 14 *** is a retrospective study of 34 patients in a single private hospital between June 2012 and January *** having hydrocephalus in pediatric groups more than 6 weeks of age were included in the ***:The mean age of all patients was 51.25±53.90 months and the mean follow-up period was 50.47±20.84 *** 34 surgeries,the success rate was 79%and the failure rate was 21%.Within 2 years,the success rate was 68.42%and above 2 years’success rate was 93.33%.In this series,7 cases of ETV were re-explored and found ventriculostomy stoma closure in 3 cases,the presence of the second membrane in re-exploration 2 cases,and presence of inflammatory arachnoid membrane in re-exploration 2 *** use of dexamethasone around the stoma in inflammatory stoma was useful,having no *** one patient of the second membrane probably due to absorption failure in communicating hydrocephalus re-exploration was failed and was managed successfully with VP ***:Predisposing factors causing ETV failure are ventriculostomy stoma closure by new arachnoid granulation tissues,remnants of the second membrane inside the stoma,CSF absorption failure,infection/high protein in CSF and inappropriate patient selection.

关键词： Endoscopic third ventriculostomy Cerebrospinal fluid VP Shunt Communicating Hydrocephalus

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The Central Cattle Breeding and Dairy Farm, Bangladesh waste contributes in emergence and spread of aminoglycoside-resistant bacteria

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Advances in Bioscience and Biotechnology 2013年第2期4卷 278-282页

作者： Sohel Ahmed M. Ibrahim Hossain Tareq Hossan K. M. rokibul islam orhan Uddin M. Badier Rahman M. Anwar Hossain Central Cattle Breeding and Dairy Farm (CCBDF) Dhaka Bangladesh Department of Biochemistry and Molecular Biology Jahangirnagar University Dhaka Bangladesh Department of Microbiology University of Dhaka Dhaka Bangladesh

Aminoglycosides are one of the categories of antibiotics most frequently used in treating several cattle diseases at the Central Cattle Breeding and Dairy Farm (CCBDF), Savar,Dhaka,Bangladesh. Untreated veterinary clinical healthcare waste (VCHW) of diseased cattle at CCBDF which directly disposed to surrounding may contribute to the antibiotic resistant bacteria pollution (ARB) pollution. The investigation analyses the role of VCHW of CCBDF in spreading ARB. Here we studied:1) veterinary clinical data and antibiotics treatment history;2) total and resistant bacteria counts in fecal samples of healthy and diseased cattles as well as VCHW of CCBDF;and 3) finally, data analysis to estimate the burden of VCHW of CCBDF in the pollution of environment with aminoglycoside antibiotics resistant bacteria. The results conclusively demonstrate the spread of 3 different aminoglycoside antibiotics, namely genta- mycin, kanamycin and streptomycin resistant bacte- ria in the surrounding environment alarmingly with high significant value (p < 0.01 - 0.05). This study re- veals the risks to the cattle as well as public health posed by the random VCHW disposal at the CCBDF, Bangladesh.

关键词： Aminoglycosides Resistant Bacteria Cattle Diseases Veterinary Clinical Healthcare Waste

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A simplified scheme for secure offline electronic payment systems

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High-Confidence Computing 2021年第2期1卷 26-34页

作者： Md.Abdullah Al Rahat Kutubi Kazi Md.rokibul Alam Yasuhiko Morimoto Department of Computer Science and Engineering Khulna University of Engineering&TechnologyKhulna 9203Bangladesh Department of Computer Science and Engineering Bangladesh Army University of Engineering and TechnologyBangladesh Graduate School of Advanced Science and Engineering Hiroshima UniversityHigashi-Hiroshima 739-8521Japan

This paper proposes a secure offline electronic(e-)payment scheme by adopting Schnorr’s untraceable blind signature(BS).Thereby,to satisfy the essential security requirements of e-payment systems,it requires much more simple computations and becomes more practical than many existing *** considerations are:to prevent the forgery of e-coin,the Bank is only the lawful entity to produce the valid e-coin;and others can verify its *** confirm no swindling,the e-coin owner also sticks her private signing key with the e-coin before spending it as the ***,through the commitment with challenge-response of Schnorr’s BS,the merchant can verify the spent e-coin,and the trusted authority can identify the dishonest spender if multiple spending ***,it embeds three distinct information of date,namely expiration,deposit,and transaction dates with every ***,it minimizes the size of the Bank’s database,correctly calculates the interest of the e-coin,and helps in arbiter if multiple spending,***,it evaluates the performance and analyzes essential security requirements of the proposed scheme,plus studies a comparison with existing ones.

关键词： Offline electronic payment Schnorr’s blind signature RSA algorithm Zero-knowledge proof Untraceability

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涤纶网络丝仿麻织物的摩擦性能

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纺织学报 2019年第10期40卷 134-140页

作者：邬淑芳张亭亭 HASAN Md rokibul 陈益人武汉纺织大学纺织科学与工程学院湖北武汉430200 武汉纺织大学湖北省纺织新材料与先进加工技术省部共建国家重点实验室培育基地湖北武汉430200

为改善涤纶网络丝仿麻织物的摩擦性能,分析了纤维、纱线、织物组织结构等因素对涤纶网络丝仿麻织物起毛起球性能、耐磨性能的影响,研究并制定了提高涤纶网络丝仿麻织物摩擦性能的树脂整理工艺。对树脂整理剂浓度、处理液温度、焙烘温度... 详细信息

为改善涤纶网络丝仿麻织物的摩擦性能,分析了纤维、纱线、织物组织结构等因素对涤纶网络丝仿麻织物起毛起球性能、耐磨性能的影响,研究并制定了提高涤纶网络丝仿麻织物摩擦性能的树脂整理工艺。对树脂整理剂浓度、处理液温度、焙烘温度、焙烘时间、柔软剂浓度等工艺参数进行优化。结果表明:涤纶网络丝仿麻织物最佳整理工艺为树脂整理剂质量浓度50g/L,处理液温度40℃,焙烘温度100℃,焙烘时间4min,柔软剂质量浓度3g/L;经最佳工艺整理后的织物在40000次摩擦后的质量损失率由未整理时的12.13%下降到5.34%,织物起毛起球等级由未整理时的1级提升到3~4级,并能基本保持织物原有的手感。

关键词：涤纶网络丝仿麻织物耐磨性起毛起球树脂整理

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Analysis the Influenced of Plain and Twill Structures on Woven Fabric Properties

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Journal of Textile Science and Technology 2020年第3期6卷 107-113页

作者： Monour Khan Hasan Mahmud Tirtha Sarathi Das Muhammad Abdullah Tushar Rahman Khan rokibul Hasan Shohan Sajid Al Rafi Md Solaiman Department of Fabric Manufacturing Engineering Textile Engineering College Noakhali Affiliated by Bangladesh University of Textiles Dhaka Bangladesh Department of Wet Processing Engineering Textile Engineering College Noakhali Affiliated by Bangladesh University of Textiles Dhaka Bangladesh

Fabric outer appearance is influenced by various fabric structures. In this research work, the physical properties of plain and twill were analyzed. Physical, mechanical and other aesthetic properties are also tested and the finding results are also compared between two samples. After testing the samples it is found that rubbing fastness remains unchanged for plain and twill fabric. Abrasion resistance, pilling, crease recovery and cover factor were evaluated for twill and plain structures using ISO 12945-2, ISO 12945-1 and ISO 2313 methods respectively. Abrasion resistance and pills property are not good for twill fabric in comparison with plain fabric but crease recovery is better of twill fabric.

关键词： Abrasion Pilling Crease Recovery Color Fastness Cover Factor EPI & PPI

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