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Optimizing Memory Access Efficiency in CUDA Kernel via Data Layout Technique

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Journal of Computer and Communications 2024年第5期12卷 124-139页

作者： Neda Seifi abdullah al-mamun Department of Computer & Cyber Sciences— SCCS Augusta University Augusta Georgia USA

Over the past decade, Graphics Processing Units (GPUs) have revolutionized high-performance computing, playing pivotal roles in advancing fields like IoT, autonomous vehicles, and exascale computing. Despite these advancements, efficiently programming GPUs remains a daunting challenge, often relying on trial-and-error optimization methods. This paper introduces an optimization technique for CUDA programs through a novel Data Layout strategy, aimed at restructuring memory data arrangement to significantly enhance data access locality. Focusing on the dynamic programming algorithm for chained matrix multiplication—a critical operation across various domains including artificial intelligence (AI), high-performance computing (HPC), and the Internet of Things (IoT)—this technique facilitates more localized access. We specifically illustrate the importance of efficient matrix multiplication in these areas, underscoring the technique’s broader applicability and its potential to address some of the most pressing computational challenges in GPU-accelerated applications. Our findings reveal a remarkable reduction in memory consumption and a substantial 50% decrease in execution time for CUDA programs utilizing this technique, thereby setting a new benchmark for optimization in GPU computing.

关键词： Data Layout Optimization CUDA Performance Optimization GPU Memory Optimization Dynamic Programming Matrix Multiplication Memory Access Pattern Optimization in CUDA

Stock appraisal for Atlantic tripletail(Lobotes surinamensis;Bloch,1790)in the Bay of Bengal,Bangladesh

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Journal of Oceanology and Limnology 2024年第5期42卷 1683-1694页

作者： Suman BARUA Qun LIU Ahmed Fazley RABBY Mdabdullah al-mamun Xu CHEN Rokeya SULTANA Aidah BalOCH College of Fisheries Ocean University of ChinaQingdao 266003China Department of Fisheries Ministry of Fisheries and LivestockDhaka 1215Bangladesh Bangladesh Fisheries Research Institute Cox’s Bazar 4700Bangladesh Directorate of Secondary and Higher Education Ministry of EducationDhaka 1000Bangladesh Gwadar Development Authority Gwadar 91200Pakistan

The Atlantic tripletail(Lobotes surinamensis)is a high revenue-generating fish species predominantly caught by mechanized artisanal fishers community and the most available member of its family in *** is a ground work of fish stock assessment study in the Bay of Bengal region to explore the life history parameters and associated biomass of this species,using three length-based approaches of TropFishR,the length-based Bayesian biomass estimation(LBB),and Froese’s length based indicators(LBIs).An almost homogenous body growth pattern(b=3.07;R^(2)=0.98)was observed in the length-weight relationship of *** life history parameters for tripletail,as determined by the von Bertalanffy Growth Function(VBGF)model,were L_(∞)=113.36 cm and k=0.51/*** length converted catch curve(LCCC)yielded an estimation of the total mortality(Z=1.77/a),with the natural mortality estimated at(M=0.53/a)and the fishing mortality estimated at(F=1.24/a).But,the ratio of mortality(F/M=0.15)by LBB captured the non-fully exploited status of biomass(B/B_(MSY)=2.1).LBI analysis indicated that the tripletail fishery’s spawning stock biomass is greater than the target and limit reference points,indicating a healthy state of biomass.

关键词： Bay of Bengal Lobotes surinamensis TropFishR length based indicator(LBI) length-based Bayesian biomass estimation(LBB) Bangladesh

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

Frequency of Uveitis among Juvenile Idiopathic Arthritis Patients in a Tertiary Care Hospital of Bangladesh: A Retrospective Study

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Open Journal of Rheumatology and Autoimmune Diseases 2024年第3期14卷 144-156页

作者： Md. Asif ali Mujammel Haque Kamrul Laila Mohammad Hafiz al-mamun Mohammed Mahbubul Islam Mohammad Imnul Islam Manik Kumar Talukder Pediatric Rheumatology Division Department of Pediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Background: Juvenile idiopathic arthritis (JIA) is the most frequently encountered pediatric rheumatologic disorder with an unknown etiology. At present there is no published data regarding the frequency of uveitis in patients with JIA in Bangladesh. This study aimed to observe the frequency of JIA-associated uveitis (JIAU) and distribution of uveitis among different sub-categories of JIA at the Pediatric Rheumatology division, both outdoor and indoor patients, Department of Pediatrics, Bangabandhu Sheikh Mujib Medical University (BSMMU) in Bangladesh. Methods: This was a retrospective study of 1784 JIA patients at the Pediatric Rheumatology division, BSMMU from July 2010 to March 2023. Results: Among the 1784 enrolled JIA patients, we observed that 0.73% of cases had uveitis. Here, 61.5% of JIAU cases were male. Most of the cases (92.3%) had bilateral uveitis and only 7.7% cases had unilateral uveitis. Among JIAU patients, the majority were Oligo JIA (53.8%), followed by ERA 30.8%, Poly JIA RF(−) 7.7% and Systemic JIA 7.7% cases respectively. This study also revealed that 15.4% of JIAU patients had ANA positivity and 23% had HLA B-27 positivity. Here we also found ocular complications associated with uveitis such as band keratopathy (23.1%), posterior synechiae (15.4%) and cataract (15.4%). Conclusions: In this study, we observed only 0.73% of patients of JIA had developed uveitis which is lower than the frequency observed in other European studies. This study also showed various ocular complications amongst JIA-associated uveitis patients which signifies the importance of adherence to periodic ophthalmological follow-up to prevent these ocular complications.

关键词： JIA Uveitis HLA-B27 ANA BSMMU

Analysis and modeling of hysteresis of piezoelectric micro-actuator used in high precision dual-stage servo system

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Control Theory and Technology 2015年第2期13卷 184-203页

作者： Md.Arifur RAHMAN abdullah al mamun Kui YAO Department of Electrical and Computer Engineering National University of Singapore Institute of Materials Research and EngineeringA*STAR (Agency for Science Technology and Research)

A dual-stage servo system consists of a primary coarse actuator for facilitating large motion and a secondary micro-actuator for small but precise motion to improve tracking performance. Piezoelectric micro-actuator made from lead zirconate titanate(PZT)has been a popular choice for the secondary stage. However, the advantage gained by the resolution of the secondary PZT actuator is reduced by its inherent hysteresis nonlinearity. Model based hysteresis compensation techniques are preferred due to their simplicity and fast response. Identification and modeling are two substantial parts in such model-based techniques. This paper presents a rigorous analysis and modeling of the hysteresis of PZT micro-actuator. Modified Generalized Prandtl-Ishlinskii and Coleman-Hodgdon models are studied. Identification of the model through nonlinear least square and particle swarm optimization are examined and compared. Several analyses are done through tuning of the model parameters and identification *** analysis and simulation results underscore the effectiveness of this modeling approach. Finally as a design example,a dual-stage simulation analysis is done to show the effectiveness of systematic modeling on hysteresis compensation.

关键词： Hysteresis particle swarm optimization(PSO) modified generalized Prandtl-Ishlinskii(GPI) inverse GPI

Chloride ingress and macro-cell corrosion of steel in concrete made with recycled brick aggregate

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Frontiers of Structural and Civil Engineering 2021年第6期15卷 1358-1371页

作者： Tarek Uddin MOHAMMED Mahfuzur RAHMAN Ahmed SABBIR Mohammad Mehedi HASAN abdullah al mamun Department of Civil and Environmental Engineering Islamic University of TechnologyBoard BazarGazipur 1704Bangladesh Department of Civil Engineering University of Information Technology and SciencesBaridharaDhaka 1202Bangladesh Bangladesh Road Research Laboratory Roads and Highways DepartmentMirpurDhaka 1216Bangladesh

An investigation on chloride ingress and macro-cell corrosion of steel bars in concrete made with recycled brick aggregate(RBA)was carried *** control cases,virgin brick aggregate(BA)and stone aggregate(SA)were also *** cylindrical and cracked prism specimens were studied for 16 different *** prism specimens were made with a segmented steel bar providing electrical connection from outside of the specimens to measure macro-cell corrosion current continuously under seawater splash exposure for a period of 30 d using a data *** specimens were submerged in 3%NaCl solution at a temperature of 40℃ to investigate chloride ingress in concrete made with RBA,BA,and SA after 120 and 180 ***-cell potential,corrosion area,and depths of corrosion were also *** chloride ingress as well as corrosion of steel bars in concrete made with the different types of aggregate is ordered as RBA>BA>SA.

关键词： brick aggregate chloride ingress macro-cell corrosion recycled brick aggregate

Improved greenhouse cucumber production under deficit water and fertilization in Northern China

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 58-64页

作者： Shaikh abdullah al mamun Hossain Lixue Wang Haisheng Liu College of Water Conservancy Shenyang Agricultural UniversityShenyang 110866LiaoningChina Department of Agricultural Engineering Patuakhali Science and Technology UniversityDumkiPatuakhali 8602Bangladesh

The objective of this study was to investigate the effects of different water and fertilizer applications on biomass,yield and fruit physical quality of greenhouse cucumber under drip *** experiment was conducted at Water Conservancy Research Institute,Shenbei District,Shenyang,Northern China during February-July,*** treatments were used in randomized block design consisted of three levels of water field capacity(FC)and urea-potash(N-K)fertilizer combinations:W1(65%of FC),W_(2)(75%of FC),W3(85%of FC)and N_(1)-K_(1)(285-305 kg/hm^(2)),N2-K2(420-435 kg/hm^(2)),N_(3)-K_(3)(530-565 kg/hm^(2)).Local farmers’conventional application of water(100%)and fertilizer(NPK)was considered as check(CK)for *** obtained was analyzed(ANOVA)to check the significant effect of *** results revealed that,treatment W_(3)N_(2)K_(1) obtained highest cucumber yield of 129.99 t/hm^(2),while W_(1)N_(1)K_(1) recorded the lowest yield(113.29 t/hm^(2)),in which total amount of seasonal water applied ranges from 85.3 mm to 172.36 *** highest yield was obtained 0.5%greater than the CK yield(129.35 t/hm^(2)).The water and fertilizer application was significantly(pal *** was also revealed that,the highest green biomass accumulation(572.4 g/plant)and fruit diameter(27.92 mm)with treatment W_(3)N_(2)K_(1) have significant influence on improved *** conclusion,the improved cucumber yield indicated 15%deficit water tolerance,in which average seasonal yield response factor(Ky)was calculated as ***,the treatment W_(3)N_(2)K_(1) could successfully be used to minimize water and fertilizer application for improving greenhouse cucumber yield.

关键词： cucumber drip irrigation fertilizer greenhouse yield

Automated Complex Fabric Faults Detection Using a Hybrid Method

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Automated Complex Fabric Faults Detection Using a Hybrid Met...

作者： abdullah-al-mamun 华南理工大学

学位级别：硕士

Fault detection or identification is highly important to fabric quality ***,faults are detected by human *** efficiency of this manual technique is low and the missed rate is high because of eye *** the best case,a quality control person cannot detect more than 60–70 % of the present *** this study a Hybrid technique is developed to identify complex faults of warp-knitted fabrics *** this system,we use smart cameras and a Human Machine Interface（HMI）*** hybrid detection or identification algorithm is comprised of numerous single techniques such as Gabor filter,PCNN,morphological filter,and another associated technique（Binarizing）those are running on the SOC processor of the smart camera for identifying distinctive types of complex faults on ***,Gabor filters are employed to enhance the contrast of images captured by a CMOS *** fault is not detected after Gabor filter it goes through ***,fault areas are segmented by PCNN with adaptive parameter ***,for making the PCNN output more clear and faults more obvious,the morphological filter has been used in this detection or identification ***,smart cameras will notice the controller to stop the warp-knitting machine once faults are found *** results demonstrate that the hybrid technique is superior to Gabor and PCNN techniques on fabric complex faults detection or identification *** this hybrid technique we get 97.08% fault detection or identification accuracy which is superior to Gabor and PCNN *** operations in a textile factory can be verified the effectiveness of the inspection system.

关键词：复杂织物故意诊断缺陷检测混合方法机器视觉

Toxic tau: structural origins of tau aggregation in alzheimer’s disease

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Neural Regeneration Research 2020年第8期15卷 1417-1420页

作者： abdullah al mamun Md.Sahab Uddin Bijo Mathew Ghulam Md Ashraf Department of Pharmacy Southeast UniversityDhakaBangladesh Pharmakon Neuroscience Research Network DhakaBangladesh Division of Drug Design and Medicinal Chemistry Research Lab Department of Pharmaceutical ChemistryAhalia School of PharmacyPalakkadIndia King Fahd Medical Research Center King Abdulaziz UniversityJeddahSaudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddahSaudi Arabia

alzheimer’s disease is characterized by the extracellular accumulation of the amyloidβin the form of amyloid plaques and the intracellular deposition of the microtubule-associated protein tau in the form of neurofibrillary *** of the alzheimer’s drugs targeting amyloidβhave been failed in clinical ***,tau pathology connects greatly in the pathogenesis of alzheimer’s *** protein enhances the stabilization of microtubules that leads to the appropriate function of the *** in the quantity or the conformation of tau protein could affect its function as a microtubules stabilizer and some of the processes wherein it is *** molecular mechanisms leading to the accumulation of tau are principally signified by numerous posttranslational modifications that change its conformation and structural ***,aberrant phosphorylation,as well as truncation of tau protein,has come into focus as significant mechanisms that make tau protein in a pathological ***,the shape-shifting nature of tau advocates to comprehend the progression of alzheimer’s disease *** this review,we emphasize the recent studies about the toxic and shape-shifting nature of tau in the pathogenesis of alzheimer’s disease.

关键词： alzheimer’s disease neurofibrillary tangles shape-shifting nature of tau tau aggregation toxic tau