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Options and Opportunities for Energy Management in Malaysian Grid Systems-Putrajaya as a Case Study

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Journal of Electronic Science and Technology 2018年第4期16卷 316-324页

作者： Aravind CV Umashankar Subramaniam md Shahrukh Adnan Khan md. Ibrahim Ibne Alam School of Engineering Taylor’s University Subang Jaya 47500 Malaysia Department of Energy and Power Electronics VIT University Vellore 632014 India University of Asia Pacific Dhaka 1205 Bangladesh

This paper presents an opportunity for energy management with an integrated photovoltaic and wind farm for the energy and economic aspects of the commercial area located in Putrajaya. The energy economy accession conforming to the wind speed, temperature, solar irradiation, and energy consumption on a daily basis is taken into consideration. Design analysis is done through the industry standard numerical tool. From the result analysis, the recommended ratio of renewable share minimizing stress to the electric grid is proposed. According to the solutions obtained from the numerical design tool, photovoltaic is recommended to be more energy efficient and economically viable in comparison of the fully crowded wind farm. From the proposed solutions, the photovoltaic is able to provide 51% of the energy consumed and it costs RM 0.365 per kW/h.

关键词： Cost grid Homer Pro photovoltaic park wind turbine farm

Multiuser Detection for MIMO-OFDM system in Underwater Communication Using a Hybrid Bionic Binary Spotted Hyena Optimizer

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Journal of Bionic Engineering 2021年第2期18卷 462-472页

作者： md Rizwan Khan Bikramaditya Das Department of Electronics&Telecommunication Engineering VSS University of TechnologyBurla-768018OdishaIndia

Multi Access Interference (MAI) is the main source limiting the capacity and quality of the Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system which fulfills the demand of high-speed transmission rate and high quality of service for future underwater acoustic (UWA) communication. Multi User Detection (MUD) is needed to overcome the performance degradation caused by MAI. In this research, both local and global optimal solutions are obtained in Bionic Binary Spotted Hyena Optimizer (BBSHO) algorithm using the Position Coordinate Vectors (PCVs) of the social behavior of spotted hyenas to achieve MUD. Further, Extremal Optimization (EO) is introduced in BBSHO algorithm to improve the local search ability within the search space. Hence, a hybrid BBSHO algorithm is proposed for achieving MUD at the receiver of the MIMO-OFDM system whose transceiver model in underwater is implemented using BELLHOP simulation system. By MATLAB simulation, it is shown that the Bit Error Rate (BER) performance of the proposed hybrid algorithm outperforms with best optimal solution within the search space towards MUD for Interference to Noise Ratio (INR) at 10 dB, 20 dB, and 40 dB over conventional detectors and metaheuristic approaches such as Binary Spotted Hyena Optimizer (BSHO), Binary Particle Swarm Optimization (BPSO) in the UWA network.

关键词： Underwater Acoustic(UWA) Orthogonal Frequency Division Multiplexing(OFDM) Multiuser Detection(MUD) Multi-Access Interference(MAI) Bionic Binary Spotted Hyena Optimizer(BBSHO) Extremal Optimization(EO)

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

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

Assessment of ecological risk for heavy metals in surface sediment of an urban river in a developing country

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International Journal of Sediment Research 2023年第6期38卷 834-846页

作者： md Saiful Islam md Humayun Kabir Mir Mohammad Ali md Towhidul Islam Asfia Niger md Humayun Kabir Zulhilmi Ismail Sujat Ahmed Khalid A.Ibrahim Abubakr M.Idris Department of Soil Science Patuakhali Science and Technology University Department of Environmental Science and Resource Management Mawlana Bhashani Science and Technology University Department of Aquaculture Sher-e-Bangla Agricultural University Department of Soil Science Bangabandhu Sheikh Mujibur Rahman Agricultural University Centre for River and Coastal Engineering(CRCE) Universiti Teknologi Malaysia(UTM) Department of Water & Environmental Engineering Faculty of Civil EngineeringUniversiti Teknologi Malaysia(UTM) Environment Center for People & Environ(CPE) Department of Biology College of ScienceKing Khalid University Center for Environment and Tourism Studies and Research King Khalid University Department of Chemistry College of ScienceKing Khalid University Research Center for Advanced Materials Science(RCAMS) King Khalid University

The speed of increasing threats to the riverine water resources makes it more critical to protect the health of Old Brahmaputra River *** current study was done to investigate the concentrations,distributions,sources,and ecological risk of heavy metals in surface sediment from the Old Brahmaputra River,*** were collected from seven sites and analyzed with an inductively coupled plasma-mass spectrometer(ICP-MS).The results showed that mean concentrations(mg/kg) of heavy metals were in the order of nickel(Ni)(44.69)> chromium(Cr)(30.16)> lead(Pb)(19.31)>copper(Cu)(17.84)> cadmium(Cd)(3.94)> arsenic(As)(2.73).The contamination factor(CF),pollution load index(PLI),enrichment factor(EF),and geo-accumulation index(Igeo) indicated low to moderate *** unit analysis revealed that the studied metals from all stations posed low *** sediment of the study river was uncontaminated to moderately contaminated,posing a minimal ecological ***,Cr,Ni,and Pb originated from anthropogenic sources rather than geogenic sources,and caused the severity of *** this regard,pollutant-based intensive monitoring of heavy metals and holistic ecological risk assessments are required to maintain a sound and healthy aquatic environment in the river.

关键词： Heavy metals Sediment quality Ecological risk Old Brahmaputra river Source identification

Intraspecific morphometric diversity of barramundi (Lates calcariferBloch, 1790) in the waters of southern Bangladesh

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Journal of Oceanology and Limnology 2019年第4期37卷 1393-1402页

作者： md Reaz CHAKLADER Ashfaqun NAHAR md Abu HANIF Muhammad A. B. SIDDIK School of Molecular and Life Sciences Curtin University Bentley 6102 Australia Department of Marine Fisheries and Oceanography Patuakhali Science and Technology University Patuakhali 8602 Bangladesh Department of Fisheries Biology and Genetics Patuakhali Science and Technology University Patuakhali 8602 Bangladesh

A total of 160 barramundi's (Lates calcarifer Bloch, 1790) sampled from four rivers (Tentulia, Balaswar, Bakkhali, and Andarmanik) along the southern coastal region of Bangladesh were investigated in terms of morphometric characters to reveal the intraspecific variation. Twenty-five morphometric measurements were extracted using the conventional method and subjected to multivariate analyses (i.e., principal component analysis (PCA), discriminate function analysis (DFA), cluster analysis (CA)) to distinguish individuals from different rivers. The result demonstrated that twenty-two out of 25 measurements was statistically significant (Univariate ANOVA) among all four populations. PCA analysis of morphometric characters resulted in two principal components, PC I and PCⅡ which accounted for 79.25% and 4.28% of the total data variance. PC I-PC Ⅱ plot explained 83.53% of total variance differentiated the population of L. calcarifer into two groups. Discriminate analysis correctly classified about 88.1% of the examined fish into the four areas. The UPGMA dendrogram showed that Bakkhali populations were the most morphologically different populations in comparison to other populations, while Andarmanik and Balaswar populations were very close to each other. The strong morphometric variation between Bakkhali and Tentulia, Andarmanik and Balaswar was observed in the present study, suggested the evidence of the separate stock population of barramundi in these locations, which might require distinct stock management strategies for resource sustainability in the waters of southern Bangladesh. However, if these findings are supported by further molecular markers and geometric morphometry, this would be a strong indication of different stocks of this population in the four rivers of southern Bangladesh.

关键词： intraspecific diversity morphometric characters stock structure Lates calcarifer Bangladesh

A review of five traditionally used anti-diabetic plants of Bangladesh and their pharmacological activities

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Asian Pacific Journal of Tropical Medicine 2017年第10期10卷 933-939页

作者： md.Rajdoula Rafe Department of Pharmacy Southeast UniversityDhakaBangladesh

Plants are used traditionally throughout the globe to treat various *** used medicinal plants are an essential part of the health sector in Bangladesh due to its abundance of a vast source of *** people from developing country like Bangladesh are greatly dependent on traditional source of *** prevalence of diabetes mellitus is increasing from recent years; therefore various researches are going on to discover better medicine to treat this *** study has focused on five plants which are Andrographis paniculata, Ageratum conyzoides, Swertia chirata, Terminalia arjuna, and Azadirachta indica to find out their traditional formulation as anti-diabetic medicine and their pharmacological activity has also been explored through literature *** available information about traditional anti-diabetic uses of these plants and their pharmacological activities were collected from various electronic sources like Pubmed, Sci Finder, Elsevier, Springer, Scopus, Scirus, Science Direct, Google Scholar and Web of Science apart from these locally available books and peer reviewed journal were also used to collect *** study will help to strengthen the relation between traditional medicine, pharmacology and drug development.A clue may be found from the information provided this review to discover new and better anti-diabetic drugs.

关键词： Anti-diabetic Traditional Ethno-medicine Pharmacology Bangladesh

Chitosan based bioactive materials in tissue engineering applications-A review

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Bioactive Materials 2020年第1期5卷 164-183页

作者： md.Minhajul Islam md.Shahruzzaman Shanta Biswas md.Nurus Sakib Taslim Ur Rashid Department of Applied Chemistry and Chemical Engineering Faculty of Engineering and TechnologyUniversity of DhakaDhaka1000Bangladesh Fiber and Polymer Science North Carolina State UniversityCampus Box 7616RaleighNC27695United States

In recent years,there have been increasingly rapid advances of using bioactive materials in tissue engineering *** materials constitute many different structures based upon ceramic,metallic or polymeric materials,and can elicit specific tissue ***,most of them are relatively brittle,stiff,and difficult to form into complex ***,there has been a growing demand for preparing materials with tailored physical,biological,and mechanical properties,as well as predictable degradation ***-based materials have been shown to be ideal bioactive materials due to their outstanding properties such as formability into different structures,and fabricability with a wide range of bioactive materials,in addition to their biocompatibility and *** review highlights scientific findings concerning the use of innovative chitosan-based bioactive materials in the fields of tissue engineering,with an outlook into their future *** also covers latest developments in terms of constituents,fabrication technologies,structural,and bioactive properties of these materials that may represent an effective solution for tissue engineering materials,making them a realistic clinical alternative in the near future.

关键词： Chitosan Bioactive material Scaffold Tissue engineering

Increasing yield and agronomic efficiency of boro rice(Oryza sativa)by fertigation with bed planting compared with conventional planting

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International Journal of Agricultural and Biological Engineering 2014年第5期7卷 34-47页

作者： md.Halim Mahmud Bhuyan Most.Razina Ferdousi md.Toufiq Iqbal Department of Farm Machinery Chuadanga Technical School and CollegeChuadanga 7200Bangladesh Islamia Academy High School&Agriculture College BaghaRajshahi 6280Bangladesh Department of Agronomy and Agricultural Extension University of RajshahiRajshahi 6205Bangladesh

The fertigation technique with raised bed planting for transplanted boro(winter,irrigated)rice production is a research focus nowadays.A field experiment compared two cultivation methods:the fertigation technique within raised bed planting on boro rice,and fertilizer broadcasting in the conventional planting *** to conventional fertilizer broadcasting,results showed that the new fertigation technique in raised bed planting increased grain yield of transplanted boro rice by up to 17.04%.It yielded a greater number of panicles per square meter,a greater number of grains per panicle,higher 1000-grains weight,and better plant growth *** percentage and weed infestation were *** six percent of irrigation water and time for application could be *** use efficiency for grain and biomass production was *** agronomic efficiency of nitrogen(N)fertilizer was significantly *** study concluded that fertigation in raised bed planting for transplanted boro rice is a new approach with higher yield and higher fertilizer and water use efficiency than the existing agronomic practice in Bangladesh.

关键词： boro rice fertigation with bed planting de-nitrification water use efficiency harvest index irrigated water management