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Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： md Ahasan Habib Shusen Lin Mehedi hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Potassium hydroxide

Status and prospects for symmetric organic redox flow batteries

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Journal of Energy Chemistry 2025年第1期100卷 125-143页

作者： md Al Raihan C.Adam Dyker Department of Chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

Regeneration mechanisms and therapeutic strategies for neuromuscular junctions in aging and diseases

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Neural Regeneration Research 2025年第1期20卷 193-194页

作者： Masashi Fujitani Abu md Mamun Tarif Yoshinori Otani Department of Anatomy and Neuroscience Faculty of MedicineShimane UniversityShimaneJapan

The neuromuscular junction(NMJ)is an essential synaptic structure composed of motor neurons,skeletal muscles,and glial cells that orchestrate the critical process of muscle contraction(Li et al.,2018).The typical NMJ structure is classically described as having a“pretzel-like”shape in mice(Figure 1),whereas human NMJs have a smaller,fragmented structure throughout *** NMJs exhibit smaller or fragmented endplates,partial denervation,reduced numbers of synaptic vesicles,abnormal presynaptic mitochondria,and dysfunctional perisynaptic Schwann cells(Alhindi et al.,2022).

关键词： aging structure Figure

Predictive car-following scheme for improving traffic flows on urban road networks

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Control Theory and Technology 2019年第4期17卷 325-334页

作者： A.S.M.BAKIBILLAH mahmudul hasan md Mustafijur RAHMAN md Abdus Samad KAMAL School of Engineering Monash UniversityBandar SunwaySelangorMalaysia Technology Operations Department Grameenphone Ltd.DhakaBangladesh Department of Electrical and Electronic Engineering Manarat International UniversityDhakaBangladesh Division of Mechanical Science and Technology Graduate School of Science and TechnologyGunma UniversityJapan

Driving behavior is one of the main reasons that causes bottleneck on the freeway or restricts the capacity of signalized *** paper proposes a car-following scheme in a model predictive control(MPC)framework to improve the traffic flow behavior,particularly in stopping and speeding up of individual vehicles in dense urban traffic under a connected vehicle(CV)*** information received through vehicle-to-vehicle(V2V)communication,the scheme predicts the future states of the preceding vehicle and computes the control input by solving a constrained optimization problem considering a finite future *** objective function is to minimize the weighted costs due to speed deviation,control input,and unsafe *** scheme shares the planned driving information with the following vehicles so that they can make better cooperative driving *** proposed car-following scheme is simulated in a typical driving scenario with multiple vehicles in dense traffic that has to stop at red signals in multiple *** speeding up or queue clearing and stopping characteristics of the traffic using the proposed scheme is compared with the existing car-following scheme through numerical simulation.

关键词： Car-following scheme model predictive control vehicle string connected vehicle environment distributed control

Preparation of Platinum Nanoclusters Based Antibacterial Agents and their Application in Finishing of Cotton Fabric

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Preparation of Platinum Nanoclusters Based Antibacterial Age...

作者： hasan md.mahmudul 中原工学院

学位级别：硕士

近几十年来,随着公共卫生安全事件的频发,个体防护意识的逐步增强增强,抗菌纺织品逐渐引起人们广泛的关注。在织物抗菌整理研究中,常见的抗菌整理剂如金属银(Ag)基纳米材料、光催化材料氧化锌(Zn O)和二氧化钛(Ti O)、有机季铵盐化合物(... 详细信息

近几十年来,随着公共卫生安全事件的频发,个体防护意识的逐步增强增强,抗菌纺织品逐渐引起人们广泛的关注。在织物抗菌整理研究中,常见的抗菌整理剂如金属银(Ag)基纳米材料、光催化材料氧化锌(Zn O)和二氧化钛(Ti O)、有机季铵盐化合物(QACs)及天然抗菌剂如壳聚糖等已经得到了深入探索。相比天然抗菌剂的来源受限、有机抗菌剂的生物毒性,无机抗菌剂仍是目前整理剂的首选。随着纳米技术的不断进步,贵金属纳米材料如纳米银颗粒(Ag NPs)、纳米金颗粒(Au NPs)和纳米铂颗粒(Pt NPs)被广泛应用于纺织品的抗菌整理中,取得了令人满意的效果。然而,对于超小尺寸、多功能化的铂纳米团簇基材料(Pt NCs)的抗菌性能研究甚少。本研究采用简单的一锅还原法制备了一种聚乙烯基亚胺稳定的Pt NCs基新型抗菌整理剂。透射电子显微镜(TEM)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FTIR)等手段用来检测Pt NCs的形貌和结构表征。结果表明合成的Pt NCs具有1.6±0.4 nm的超小球形,并呈现零价态。选取大肠杆菌和铜绿假单胞菌为目标检测细菌,通过抑菌圈试验和OD值测试,检测制备的新型Pt NCs材料的抑菌效果。Pt NCs基抗菌剂的浓度为0.035 mg/m L和0.018 mg/m L时,对大肠杆菌和铜绿假单胞菌均有一定的抗菌作用,这是由于Pt NCs材料带正电荷,更容易进入负电的细菌体内产生活性氧(ROS)进而破坏细菌的DNA,起到抗菌的效果。随后,这种令人满意的Pt NCs基抗菌剂通过浸渍法、汽蒸法和涂覆法三种方法对棉织物进行整理,并采用振荡法验证对于大肠杆菌的抑制效果,光学显微镜、拉伸强度测试仪和白度测试仪测定Pt NCs基抗菌剂整理后棉织物的形态、机械性能和白度。浸渍法实验中,整理后的棉织物在光学显微镜下结构形貌变化不大;兼顾织物白度性能,当Pt NCs基抗菌剂的用量为0.06 mg/m L,浸渍时间为48 h时抗菌效果最佳。汽蒸法整理后的棉织物在相同条件下的抑菌率普遍高于浸渍法处理后的织物,但由于汽蒸后抗菌整理剂进入棉织物的不均匀问题,限制了其实际应用。涂覆法抗菌整理的抗菌效果要明显优于浸渍法和汽蒸法。本研究采用水性聚氨酯和有机硅树脂两种助剂,配方为胶粘剂10%、增稠剂2%、分散剂0.2%进行整理实验。实验结果表明,两种助剂结合Pt NCs基抗菌剂涂覆在棉织物均展现出对于大肠杆菌较好的抑菌性能。整理后的织物在光学电子显微镜下表现出与原布样不同的状态,反映了纤维表面被涂层助剂的附着,改善了织物形态结构。另一方面,抗菌整理后的织物,其机械拉伸性能明显提高,但在白度方面,三种方法抗菌整理后织物的白度数据与未抗菌整理的棉织物的白度数据有一定差异。结合在白度和拉伸性能数据,以水性聚氨酯为粘合剂,Pt NCs基抗菌剂添加量为0.14 mg/m L时,对棉织物涂布整理达到的抗菌效果最佳。结果也反映了合成的Pt NCs基抗菌剂与水溶性粘合剂有着更好的相溶性和亲和力,这种涂覆方法更有利实现Pt NCs基抗菌剂的纺织品整理的应用。随着抗菌研究逐渐成为人们关注的热点问题,抗菌剂的开发和应用在未来将有着非常可观的市场应用前景。本研究提出了一种新型Pt NCs基抗菌整理剂的抗菌效果以及其在棉织物整理的最佳工艺。相比于传统的纳米银等抗菌剂,这种新型Pt NCs抗菌整理剂具有用量小、抗菌效果好的优点,为开发新型抗菌整理剂提供了具有价值的理论依据和支撑,同时也能补充无机抗菌剂的种类,丰富了纺织品在抗菌整理过程中的多种选择,具有一定的市场应用价值。

关键词：抗菌整理剂棉织物粘合剂抗菌性能铂纳米团簇

Steel Surface Defect Detection Using Learnable Memory Vision Transformer

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Computers, Materials & Continua 2025年第1期82卷 499-520页

作者： Syed Tasnimul Karim Ayon Farhan md.Siraj Jia Uddin Department of Computer Science and Engineering BRAC UniversityDhaka1212Bangladesh Department of AI and Big Data Endicott CollegeWoosong UniversityDaejeon34606Republic of Korea

This study investigates the application of Learnable Memory Vision Transformers(LMViT)for detecting metal surface flaws,comparing their performance with traditional CNNs,specifically ResNet18 and ResNet50,as well as other transformer-based models including Token to Token ViT,ViT withoutmemory,and Parallel *** awidely-used steel surface defect dataset,the research applies data augmentation and t-distributed stochastic neighbor embedding(t-SNE)to enhance feature extraction and *** techniques mitigated overfitting,stabilized training,and improved generalization *** LMViT model achieved a test accuracy of 97.22%,significantly outperforming ResNet18(88.89%)and ResNet50(88.90%),aswell as the Token to TokenViT(88.46%),ViT without memory(87.18),and Parallel ViT(91.03%).Furthermore,LMViT exhibited superior training and validation performance,attaining a validation accuracy of 98.2%compared to 91.0%for ResNet 18,96.0%for ResNet50,and 89.12%,87.51%,and 91.21%for Token to Token ViT,ViT without memory,and Parallel ViT,*** findings highlight the LMViT’s ability to capture long-range dependencies in images,an areawhere CNNs struggle due to their reliance on local receptive fields and hierarchical feature *** additional transformer-based models also demonstrate improved performance in capturing complex features over CNNs,with LMViT excelling particularly at detecting subtle and complex defects,which is critical for maintaining product quality and operational efficiency in industrial *** instance,the LMViT model successfully identified fine scratches and minor surface irregularities that CNNs often *** study not only demonstrates LMViT’s potential for real-world defect detection but also underscores the promise of other transformer-based architectures like Token to Token ViT,ViT without memory,and Parallel ViT in industrial scenarios where complex spatial relationships are *** research m

关键词： Learnable Memory Vision Transformer(LMViT) Convolutional Neural Networks(CNN) metal surface defect detection deep learning,computer vision image classification learnable memory gradient clipping label smoothing t-SNE visualization

Prime Editing Technology and Its Prospects for Future Applications in Plant Biology Research

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BioDesign Research 2020年第1期2020卷 124-137页

作者： md.mahmudul Hassan Guoliang Yuan Jin-Gui Chen Gerald A.Tuskan Xiaohan Yang Biosciences Division Oak Ridge National LaboratoryOak Ridge TN 37831USA Center for Bioenergy Innovation Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Genetics and Plant Breeding Patuakhali Science and Technology UniversityDumkiPatuakhali 8602Bangladesh

Many applications in plant biology requires editing genomes accurately including correcting point mutations,incorporation of single-nucleotide polymorphisms(SNPs),and introduction of multinucleotide insertion/deletions(indels)into a predetermined position in the *** types of modifications are possible using existing genome-editing technologies such as the CRISPR-Cas systems,which require induction of double-stranded breaks in the target DNA site and the supply of a donor DNA molecule that contains the desired edit ***,low frequency of homologous recombination in plants and difficulty of delivering the donor DNA molecules make this process extremely *** kind of technology known as base editing can perform precise editing;however,only certain types of modifications can be obtained,e.g.,C/G-to-T/A and A/T-to-G/***,a new type of genome-editing technology,referred to as“prime editing,”has been developed,which can achieve various types of editing such as any base-to-base conversion,including both transitions(C→T,G→A,A→G,and T→C)and transversion mutations(C→A,C→G,G→C,G→T,A→C,A→T,T→A,and T→G),as well as small indels without the requirement for inducing double-stranded break in the *** prime editing has wide flexibility to achieve different types of edits in the genome,it holds a great potential for developing superior crops for various purposes,such as increasing yield,providing resistance to various abiotic and biotic stresses,and improving quality of plant *** this review,we describe the prime editing technology and discuss its limitations and potential applications in plant biology research.

关键词： donor holds precise

Reproductive Isolating Mechanisms in the Bangladesh Coastal Bullfrog Hoplobatrachus litoralis and Its Congeneric Species Revealed by Crossing Experiments and Examination on Spermatogenesis of the Hybrids

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Asian Herpetological Research 2017年第1期18卷 27-38页

作者： mahmudul hasan Mohammed Mafizul ISLAM md. Mukhlesur Rahman KHAN Ratanasate WANICHANON Atsushi KURABAYASHI Masayuki NUMIDA Amphibian Research Center Hiroshima University 1-3-1 Kagamiyama Higashihiroshima 739-8526 Japan Department of Fisheries Biology and Genetics Bangladesh Agricultural University Mymensingh-2202 Bangladesh Department of Anatomy Phramonkutklao Medical College Rajawithi Rd. Bangkok 10400 Thailand 1-6-15 Ushitaasahi Higashi ku Hiroshima 732-0067 Japan

To elucidate reproductive isolating mechanisms in the Bangladesh coastal bullfrog Hoplobatrachus litoralis and its congeneric species, we performed crossing experiments using three species： H. litoralis, H. tigerinus and H. rugulosus. In addition, we conducted histological observations on spermatogenesis of the hybrids. The reciprocal hybrids between H. litoralis and H. tigerinus developed normally with somewhat lower viability at the metamorphosis stage compared with the controls. Most of the metamorphosed frogs became mature. On the other hand, almost all hybrids between female H. rugulosus and male H. litoralis or H. tigerinus died of underdevelopment at the tadpole stage, and only a few hybrids metamorphosed normally and survived to maturity. The inner structures of the testes of the control H. litoralis and H. tigerinus were completely normal, with seminiferous tubules filled with compact bundles of normal spermatozoa. Those of the reciprocal hybrids between H. litoralis and H. tigerinus were almost normal or slightly abnormal, with seminiferous tubules that contained pycnotic nuclei in addition to normal bundles of normal spermatozoa, which demonstrates slight abnormalities in spermatogenesis. In contrast, the hybrids between female H. rugulosus and male H. litoralis or H. tigerinus had no bundles of spermatozoa nor spermatids in the seminiferous tubules, which indicates entirely abnormal spermatogenesis. Meiotic chromosome figures in the reciprocal hybrids between H. litoralis and H. tigerinus showed slight abnormalities, with the occurrence of univalents and increase of rod-shaped bivalents. These results indicate that H. litoralis and H. tigerinus are not isolated from each other by hybrid inviability nor by hybrid sterility, although the hybrids showed somewhat abnormal spermatogenesis in hybrids and that H. rugulosus is isolated from both H. litoralis and H. tigerinus by incomplete hybrid inviability and complete hybrid sterility.

关键词： Hoplobatrachus reproductive isolation interspecific hybrids spermatogenesis meiotic chromosomes

Experimental and analytical assessment of the hypervelocity impact damage of GLAss fiber REinforced aluminum

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Defence Technology（防务技术） 2022年第7期18卷 1232-1246页

作者： md.Zahid hasan Bangladesh Air Force Academy Bangladesh Air Force Base Matiur RahmanBAF Academy Road7404 JessoreKhulnaBangladesh

This article addresses the response of GLAss fiber REinforced aluminum to hypervelocity impacts of micrometeoroid analogs at impact velocities of 7 km/s and *** relation,the damage modes of different GLAss fiber REinforced aluminum configurations have been *** GLAss fiber REinforced aluminum configurations comprised six to twelve variably thick aluminum layers and up to four plies of glass fiber reinforced epoxy per composite *** impact experiments have been conducted with the help of a two-stage light-gas gun,wherein aluminum-and stainless steel projectiles were launched at velocities up to 7.15 km/*** inspection of the damage area suggested the dissipation of impact energy in elastic-plastic deformation,petalling,delamination,debonding,tensile failure of fibers,and pyrolysis of epoxy.A prevailing damage mode was not apparent *** quasi-isotropic ply orientation of S2-glass/FM94-epoxy laminates promoted the interference of shockand rarefaction waves and suppressed the damage area of GLAss fiber REinforced *** discriminate between the impact performance of different GLAss fiber REinforced aluminum configurations,the energy dissipated in different damage modes of GLAss fiber REinforced aluminum has been assessed *** terms of normalized energy,the cross-ply GLAss fiber REinforced aluminum dissipated higher energy in petal formation than in other primary damage *** normalized petalling energy was found to decline with the increase of impact *** outcomes of this study will help to optimize the GLAss fiber REinforced aluminum laminate,which will be employed as a bumper shield to prevent the fatal damage and the unzipping of a spacecraft pressure bulkhead.

关键词： Hypervelocity impact Petalling Fiber failure Volumetric compression Sublimation of epoxy