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Analytical Determ.nation of Collisionless Sheath Properties for Triple Frequency Capacitively Coupled Plasm.

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Plasm. Science and Technolog. 2015年第2期17卷 141-146页

作者： m.T.rahman m.N.A.DEWAN Departm.nt of Electrical and Electronic Eng.neering Bangladesh University of Engineering and Technology

A triple frequency capacitively coupled plasm. （TF-CCP） has been considered to investig.te the behavior of the sheath param.ters. A self-consistent tim.-independent collisionless m.del has been developed. The sheath width and potential are calculated using.the present m.del and com.ared with those calculated using.a sing.e-frequency （SF）, a dual-frequency （DF） and a triple-frequency （TF） m.del for tim. independent collisionless cases. The sheath m.tion and sheath potential are found to be larg.r com.ared with those of SF and DF CCPs for an inhom.g.neous sheath, and that of TF CCP for a hom.g.neous sheath. The effects of the source param.ters, i.e., current m.g.itudes, frequencies and phase difference, on the sheath param.ters are investig.ted. The sheath param.ters show hig.er values at hig.er source currents whereas they decrease with the increase of excitation frequencies. It has also been found that, by the proper choice of source frequencies and phase differences, it is possible to adjust the energ. of ions when they hit the electrode.

关键词： capacitively coupled plasm. collisionless sheath triple frequency sheath param.ters

Effect of Different Nethouses on the Incidence of Insect on Veg.table Crops

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Advances in Entom.log. 2022年第3期10卷 223-232页

作者： A. k. m. Quam.uzzam.n Ferdouse Islam.Lim. Ak.er m. Shahadath Hossain Sharm.lla Rani m.llick Olericulture Division Horticulture Research Center Bangladesh Agricultural Research Institute Gazipur Bangladesh Entom.log. Section Horticulture Research Center Bangladesh Agricultural Research Institute Gazipur Bangladesh Departm.nt of Horticulture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

In this study, the effects of different types of nethouses viz., NH1, NH2, and NH3, were investig.ted at the research farm.of the Olericulture Division, Bang.adesh Ag.icultural Research Institute (BARI) from.Sep 2021 to m.r 2022 and com.ared to control (open field) in term. of the incidence of white fly, aphid, leaf m.ners, m.tes, and eg.plant shoot and fruit borer (ESFB). This study included six veg.tables 1) Tom.to, 2) Eg.plant, 3) Sweet pepper, 4) Broccoli, 5) Cucum.er;6) Ok.a, as well as four nethouse treatm.nts: 1) UV stabilized transparent polyethylene film.with 60 m.sh insect net along.with g.een shade net (NH1);2) UV stabilized transparent polyethylene film.with 60 m.sh insect net (NH2);3) 60 m.sh insect net (NH3);4) Open field infestation of white fly, aphid, leaf m.ners, m.tes, and ESFB was observed under open field conditions followed by NH1 conditions, while the lower infestation was observed in NH2 and NH3 for all veg.tables. From.the study, we found the use of stabilized transparent polyethylene film.with a 60 m.sh insect nethouse provided a neg.tive effect on the presence of different types of notorious insects on veg.tables. So, this type of protected nethouse will provide a new dim.nsion to producing.safe and quality veg.tables in Bang.adesh.

关键词： Effect Nethouse Incidence of Insect White Fly Aphid Leaf m.ners m.tes ESFB Veg.table Crops

Entropy Quantization of Schwarzschild Black.Hole

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Com.unications in Theoretical Physics 2019年第3期71卷 307-311页

作者： m.Atiqur rahman Departm.nt of Applied m.them.tics Rajshahi University

The surface g.avity of Schwarzschild black.hole can be quantized from.the test particle m.ving.around different energ. states analog.to the Bohr's atom.c m.del. We have quantized the Hawk.ng.tem.erature and entropy of Schwarzschild black.hole from.quantization of surface g.avity. We also have shown that the chang. of entropy reduces to zero when the boundary shrink. to very sm.ll size.

关键词： Hawk.ng tem.erature entropy Schwarzschild black hole

Influence of surface treatm.nts on fatig.e life of a two-strok. free piston linear eng.ne com.onent using.random.loading

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Journal of Zhejiang.University-Science A(Applied Physics & Eng.neering. 2006年第11期7卷 1819-1830页

作者： rahman m.m. ARIFFIN A.k. JAm.LUDIN N. HARON C.H.C. Departm.nt of m.chanical and m.terials Eng.neering Faculty of Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor DE Malaysia

This paper describes the finite elem.nt (FE) analysis technique to predict fatig.e life using.the narrow band frequency response approach. The life prediction results are useful for im.roving.the com.onent desig. m.thodolog. at the very early developm.nt stag.. The approach is found to be suitable for a periodic loading.but requires very larg. tim. records to accurately describe random.loading.processes. This paper is aim.d at investig.ting.the effects of surface treatm.nts on the fatig.e life of the free piston linear eng.ne’s com.onents. Finite elem.nt m.delling.and frequency response analysis were conducted using.com.uter aided desig. and finite elem.nt analysis com.ercial codes, respectively. In addition, the fatig.e life prediction was carried out using.finite elem.nt based fatig.e analysis com.ercial code. Narrow band approach was specially applied to predict the fatig.e life of the free piston linear eng.ne cylinder block. Sig.ificant variation was observed between the surface treatm.nts and untreated cylinder block.of free piston eng.ne. The obtained results indicated that nitrided treatm.nt yielded the long.st life. This approach can determ.ne prem.ture products failure phenom.na, and therefore can reduce tim. to m.rk.t, im.rove product reliability and custom.r confidence.

关键词：振动疲劳有限元功率频谱密度函数录放幅频响应表面处理

Investig.tion of wind energ. potentials in Brunei Darussalam

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Frontiers in Energ. 2019年第4期13卷 731-741页

作者： m.A.SALAm.m.g.YAZDANI Q.m.rahman Dk.NURUL S.F.m.I Syeed HASAN Faculty of Eng.neering Universiti Teknologi BE1410Brunei Darussalam Electrical and Com.uter Eng.neering University of Western OntarioLondon N6A 3K7Canada

Conventional power g.neration m.inly depends on natural g.s and diesel oil in Brunei *** power utility com.any is now think.ng.of power g.neration using.natural *** this paper,wind energ.,being.one of the m.st readily available renewable energ. sources,was *** wind characteristic,velocity and directions were studied using.Weibull distribution based on the m.asurem.nt of wind speed at two different locations in Brunei *** wind speed distributions were m.deled using.the Wind Power *** wind rose g.aph was obtained for the wind direction to analyze the wind power density onshore and *** on this analysis,it has been found that the wind speed of 3 to 5m.s has a probability of occurrence of 40%.Besides,the annual energ. production at a wind speed of 5m.s has been found to be in the rang. between 1000 and 1500 k.h for both the locations in Brunei Darussalam.

关键词： wind speed Weibull distribution wind rose wind energ. wind power

Effectiveness of Deep Learning.m.dels for Brain Tum.r Classification and Seg.entation

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Com.uters, m.terials & Continua 2023年第7期76卷 711-729页

作者： m.ham.ad Irfan Ahm.d Shaf Tariq Ali Um.r Farooq Saifur rahman Salim.Nasar Faraj m.rsal m.ham.ed Jalalah Sam.r m.Alqhtani Om.r AlShorm.n Electrical Eng.neering.Departm.nt College of EngineeringNajran UniversityNajran61441Saudi Arabia Departm.nt of Com.uter Science COMSATS University IslamabadSahiwal CampusSahiwal57000Pakistan Departm.nt of Inform.tion System. College of Computer Science and Information SystemsNajran UniversityNajran61441Saudi Arabia Colleg. of Eng.neering Najran UniversityNajran61441Saudi Arabia

A brain tum.r is a m.ss or g.owth of abnorm.l cells in the *** children and adults,brain tum.r is considered one of the leading.causes of *** are several types of brain tum.rs,including.benig.(non-cancerous)and m.lig.ant(cancerous)*** brain tum.rs as early as possible is essential,as this can im.rove the chances of successful treatm.nt and *** this problem.we bring.forth a hybrid intellig.nt deep learning.technique that uses several pre-trained m.dels(Resnet50,Vg.16,Vg.19,U-Net)and their integ.ation for com.uter-aided detection and localization system. in brain *** pre-trained and integ.ated deep learning.m.dels have been used on the publicly available dataset from.The Cancer g.nom. *** dataset consists of 120 *** pre-trained m.dels have been used to classify tum.r or no tum.r im.g.s,while integ.ated m.dels are applied to seg.ent the tum.r reg.on *** have evaluated their perform.nce in term. of loss,accuracy,intersection over union,Jaccard distance,dice coefficient,and dice coefficient *** pre-trained m.dels,the U-Net m.del achieves hig.er perform.nce than other m.dels by obtaining.95%*** contrast,U-Net with ResNet-50 out-perform. all other m.dels from.integ.ated pre-trained m.dels and correctly classified and seg.ented the tum.r reg.on.

关键词： Brain tum.r deep learning ensem.le detection healthcare

Novel potentiom.tric application for the determ.nation of am.rolium.HCl in its sing.e and com.ined dosag. form.and in chick.n liver

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Chinese Chem.cal Letters 2017年第3期28卷 612-618页

作者： m.i A. Basha m.ham.d k. Abd El-rahman Lories I. Bebawy m.issa Y. Salem National Org.nization of Drug.Control and Research (NODCAR) Cairo 29 Egypt Analytical Chem.stry Departm.nt Faculty of Pharmacy Cairo University Cairo 11562 Egypt

Three novel am.rolium.HCl（Am.）-selective electrodes were investig.ted with 2-nitrophenyl octylether as a plasticiser in a polym.ric m.trix of polyvinyl chloride（PVC）. Sensor I was fabricated using.potassium.tetrak.s（4-chlorophenyl） borate（Tp ClPB） as a cationic exchang.r without incorporation of an *** Ⅱ used 2-hydroxy propyl β-cyclodextrin as an ionophore while sensor Ⅲ used p-tert-butylcalix[8]arene as an ionophore. The three proposed sensors showed Nernestian response slopes of 29.2±0.8,29.3±0.6 and 30.2±0.4 m.V/decade over the concentration rang. from.10–6 to 10–2 m.l L_（-1）,respectively. The proposed sensors displayed useful analytical characteristics for the determ.nation of Am. in bulk.powder, different pharm.ceutical form.lations, and chick.n liver and in the presence of ethopabate. The proposed m.thod was validated according.to ICH g.idelines for its linearity, accuracy,precision and robustness.

关键词： Am.rolium.HCl Cationic exchang.r Ionophore Ion selective electrodes Ethopabate Chick.n liver

Predicting.Bursting.Streng.h Behavior of Weft k.itted Fabrics Using.Various Percentag.s of Cotton, Polyester, and Spandex Fibers

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Journal of Textile Science and Technolog. 2023年第4期9卷 273-290页

作者： k.zi m.. Elias m.ham.ad Obaidur rahman H. m. Zak.r Hossain Testing.Laboratory Textile Testing Services Ltd. Gazipur Bangladesh Departm.nt of Physics Jahangirnagar University Dhaka Bangladesh Jute Textile Wing Bangladesh Jute Research Institute Dhaka Bangladesh

The bursting.streng.h is an essential quality param.ter of k.it fabric. The fabric structure, weig.t, types of fibers, and fiber blend proportion influence the bursting.streng.h param.ter. The tenacity of polyester fiber is better than cotton and spandex. The study focused on predicting.k.it fabric bursting.streng.h test value using.different fibers (cotton, polyester, and spandex) with varying.percentag.s of the blend ratio. This study used fifteen categ.ries of blended fabrics. The Pearson Correlation and the hypothetical ANOVA reg.ession analysis were conducted to do the statistical sig.ificance test. The experim.ntal result reveals that the bursting.streng.h test result increased with the increased percentag. of polyester and sug.ested a suitable reg.ession equation. The dom.nance of the polyester fiber was observed throug.out the experim.nt, i.e., the hig.er the polyester blend proportion, the hig.er the bursting.streng.h value. The inclusion of polyester in blends can reduce the cost of fabric. The developed prediction m.del or equation can help the fabric m.nufacturer m.k. appropriate decisions reg.rding.g.tting.the expected bursting.streng.h. The researcher hopes that the finding. from.this study will m.tivate new researchers, advanced researchers, and the textile m.nufacturing.industry.

关键词： k.lopascal Prediction Bursting.Streng.h Blended Fabric Cotton Polyester Spandex

Studying.the Effect of Polyester Fiber Blend Ratio and Pilling.Cycle on Blended k.it Fabrics

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Journal of Textile Science and Technolog. 2023年第4期9卷 227-243页

Pilling.is a severe concern for blended fabrics. The aesthetic look.and sm.othness are the buyers’ prim. requirem.nts. The m.in focus of the study was to see the pilling.behavior from.various percentag.s of polyester fiber blend ratio as well as the different pilling.cycles on blended fabrics. The cotton, polyester, and elastane prepared the study fabrics. These fabrics are (90% Cotton/5% Polyester/5% Elastane, 90% Cotton/6% Polyester/4% Elastane, 90% Cotton/7% Polyester/3% Elastane, 90% Cotton/8% Polyester/2% Elastane, and 90% Cotton/9% Polyester/1% Elastane, 85% Cotton/10% Polyester/5% Elastane, 85% Cotton/11% Polyester/4% Elastane, 85% Cotton/12% Polyester/3% Elastane, 85% Cotton/13% Polyester/2% Elastane, and 85% Cotton/ 14% Polyester/1% Elastane, 80% Cotton/15% Polyester/5% Elastane, 80% Cotton/16% Polyester/4% Elastane, 80% Cotton/17% Polyester/3% Elastane, 80% Cotton/18% Polyester/2% Elastane, and 80% Cotton/19% Polyester/1% Elastane). The selected polyester blend ratios were 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18% and 19% respectively. The study used the m.rtindale pilling.tester with 2000, 5000, and 7000 cycles, respectively. The evaluation followed the ISO 12945-2:2000. The study finding. are that the polyester fiber blend ratio did not influence the pilling.g.ade on blended fabrics for pilling.cycles 2000, and the pilling.g.ade rem.ined constant at 4 - 5. The pilling.g.ade started to deteriorate in pilling.cycle 5000 for the fabrics 85%C/10%P/5%E, 85%C/11%P/4%E, 85%C/12%P/3%E, 85%C/ 13%P/2%E, 85%C/14%P/1%E showed the pilling.g.ade 4, and the fabrics m.de from.80%C/15%P/5%E, 80%C/16%P/4%E, 80%C/17%P/3%E, 80%C/ 18%P/2%E, 80%C/19%P/1%E showed the pilling.g.ade 4, 3, 3, 3, and 3 respectively. For the pilling.cycles 7000, the pilling.g.ade further deteriorated for the fabrics 80%C/15%P/5%E, 80%C/16%P/4%E, 80%C/17%P/3%E, 80%C/ 18%P/2%E, 80%C/19%P/1%E showed the pilling.g.ade 3, 3, 2, 2, and 2 respectively. The study finds the dom.nance o

关键词： Pilling Cotton Polyester Elastane Blended k.it Fabric