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Capacity maximizing in massive MIMO with linear precoding for SSF and LSF channel with perfect CSI

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Digital Communications and Networks 2021年第1期7卷 92-99页

作者： Tasher Ali Sheikh Joyatri Bora md.anwar Hussain Department of Electronics and Communication Engineering Nordi Eastern Regional Institute of Science and TechnologyNirjuliArunachal Pradesh791109India

The capacity of a massive MIMO cellular network depends on user and antenna selection algorithms,and also on the acquisition of perfect Channel State Information(CSD).Low computational cost algorithms for user and an-tenna selection significantly may enhance the system capacity,as it would consume a smaller bandwidth out of the total bandwidth for downlink *** objective of this paper is to maximize the system sum-rate capacity with efficient user and antenna selection algorithms and linear *** consider in this paper,a slowly fading Rayleigh channel with perfect acquisition of CSI to explore the system sum-rate capacity of *** MIMO *** user selection,we apply three algorithms,namely Semi orthogonal user selection(SUS),Descending Order of SNR-based User Scheduling(DOSUS),and Random User Selection(RUS)*** all the user selection algorithms,the selection of Base Station(BS)antenna is based on the maximum Signal-to-Noise Ratio(SNR)to the selected *** users are characterized by having both Small Scale Fading(SSF)due to slowly fading Rayleigh channel and *** Fading(ISF)due to distances from the base ***,we use linear precoding techniques,such as Zero Forcing(ZF),Minimum Mean Square Error(MMSE),.and Maximum Ratio Transmission(MRT)to reduce interferences,thereby improving average system sum-rate *** using SUS,DOSUS,and RUS user selection algorithms with ZF,MMSE,and MRT precoding techniques are *** also analyzed and compared the computational complexity of all the three user selection *** computational complexities of the three algorithms that we achieved in this paper are 0(1)for RUS and DOSUS,and 0(M^2N)for suS which are less than the other conventional user selection methods.

关键词： Massive MIMO User selection Antenna selection Complexity DOSUS and antenna selection 5G

Potentiality of Different Seed Priming Agents to Mitigate Cold Stress of Winter Rice Seedling

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Phyton-International Journal of Experimental Botany 2021年第5期90卷 1491-1506页

作者： md.parvez anwar md.Ariful Islam Khalid A.K.M.Mominul Islam Sabina Yeasmin Sharif Ahmed Adel Hadifa Ismail A.Ismail Akbar Hossain Ayman EL Sabagh Agro Innovation Laboratory Department of AgronomyBangladesh Agricultural UniversityMymensingh2202Bangladesh International Rice Research Institute Bangladesh OfficeDhaka1213Bangladesh Rice Research and Training Center Field Crops Research InstituteAgricultural Research CenterSakha33717Egypt Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Bangladesh Wheat and Maize Research Institute Dinajpur5200Bangladesh Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafr Elsheikh33516Egypt

Seed priming has proved to be an effective pre-germination seed invigoration technique for different crops to improve seed and seedling performance under different abiotic *** Bangladesh,winter rice is very often exposed to cold waves just after sowing in the nursery bed resulting in poor seed germination and seedling emergence,yellowish and thin seedlings production,and a very low survival *** priming may mitigate the cold stress during seed germination and seedling emergence and helps in the quality seedling production of winter *** evaluate the efficacy of different seed priming techniques in increasing seedling emergence,growth,vigor and survivability of winter rice cultivars under cold stress,a pot experiment was conducted at the Department of Agronomy,Bangladesh Agricultural University during December 2018 to January *** experiment comprised two factors,(A)Winter rice variety namely,(i)BRRI dhan29 and (ii)BRRI dhan36;(B)Seed priming agent namely (i)Control(no priming),(ii)20000 ppm NaCl,(iii)30000 ppm NaCl,(iv)20000 ppm KCl,(v)30000 ppm KCl,(vi)20000 ppm CaCl2,(vii)30000 ppm CaCl2,(viii)50 ppm CuSO4,(ix)75 ppm CuSO_(4),(x)10000 ppm ZnSO4,(xi)15000 ppm ZnSO4,(xii)2 ppm Na2MoO4,(xiii)3 ppm Na2MoO4,(xiv)100 ppm PEG(Polyethylene glycol 4000)and (xv)150 ppm *** were sown on two different dates viz.,1st December and 1st January so that seedlings are exposed to cold stress at different *** experiment was laid out in a completely randomized design(CRD)with three *** indicated that(in most of the cases)seed priming has a positive impact on seedling emergence rate(%),root length,shoot length,root shoot ratio,root dry weight,shoot dry weight,seedling dry weight and survival rate(%).Among the priming agents,KCl and CaCl2 performed best;while priming with NaCl and PEG showed no advantages over no priming for both the sowing *** general,BRRI dhan36 performed better than BRRI dhan29 in terms of seedling growth because

关键词： Seed invigoration seedling emergence seedling mortality seedling growth low temperature stress

Surface Morphology and Thermo-Electrical Energy Analysis of Polyaniline (PANI) Incorporated Cotton Fabric

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Energy Engineering 2024年第1期121卷 1-12页

作者： md.Shohan parvez md.Mustafizur Rahman Mahendran Samykano Mohammad Yeakub Ali Automotive Engineering Research Group Faculty of Mechanical and Automotive Engineering TechnologyUniversiti Malaysia Pahang Al-Sultan AbdullahPekanMalaysia Department of Textile Engineering Khulna University of Engineering&Technology(KUET)KhulnaBangladesh Centre for Research in Advanced Fluid and Processes(CARIFF) Universiti Malaysia Pahang Al-Sultan AbdullahLebuhraya Tun RazakGambangMalaysia Mechanical Engineering Programme Area Faculty of EngineeringUniversiti Teknologi BruneiBruneiDarussalam

With the exponential development in wearable electronics,a significant paradigm shift is observed from rigid electronics to flexible wearable ***(PANI)is considered as a dominant material in this sector,as it is endowed with the optical properties of both metal and ***,its widespread application got delineated because of its irregular rigid form,level of conductivity,and precise choice of *** PANI in textile materials can generate promising functionality for wearable *** research work employed a straightforward in-situ chemical oxidative polymerization to synthesize PANI on Cotton fabric surfaces with varying dopant(HCl)***-treatment using NaOH is implemented to improve the conductivity of the fabric surface by increasing the monomer *** research explores the morphological and structural analysis employing SEM,FTIR and *** surface resistivity was measured using a digital multimeter,and thermal stability is measured using *** successful polymerization,a homogenous coating layer is *** is revealed that the simple pre-treatment technique significantly reduces the surface resistivity of Cotton fabric to 1.27 kΩ/cm with increasing acid concentration and thermal *** electro-thermal energy can also reach up to 38.2°C within 50 s with a deployed voltage of 15 *** modified fabric is anticipated to be used in thermal regulation,supercapacitor,sensor,UV shielding,antimicrobial and other prospective functional applications.

关键词： Polyaniline cotton in-situ polymerization SEM TGA heating fabric

Complete Garment Costing with Major Cost Breakdown

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Journal of Textile Science and Technology 2023年第2期9卷 115-126页

作者： md. Monirul Islam Rajib md. Mehedi Hasan parvez md. Shofiul Islam Tanveer Ahmed md. Rashedul Islam Department of Apparel Manufacturing & Technology BGMEA University of Fashion & Technology (BUFT) Dhaka Bangladesh

Apparel business is one of the oldest global businesses. Emergence of different apparel manufacturing nations, rapid development of global supply chains and increasingly higher demand for fast fashion items are exposing the apparel manufacturers to competitive product prices. Alongside, the persistent global depression has also forced the apparel business to curtail the prices to remain sustainable in the industry. Garment costing is the systematic process of meticulously calculating the total cost of a certain quantity of garments from raw material purchase to converting them to the final products, plus other terms and conditions stated by the customers. The sum of these costs adding the profit margin is the selling price. This research outlines the process of preparing cost sheets for basic garment products. The research proposes a clear method of generating easily understandable, complete garment cost sheets for the apparel industry.

关键词： Apparel Costing Shirt Trousers T-Shirt

Catalytic steam reforming of tar for enhancing hydrogen production from biomass gasification:a review

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Frontiers in Energy 2020年第3期14卷 545-569页

作者： Ru Shien TAN Tuan Amran TUAN ABDULLAH anwar JOHARI Khairuddin md.ISA Centre of Hydrogen Energy Institute of Future EnergySchool of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310 SkudaiJohorMalaysia School of Environmental Engineering Universiti Malaysia PerlisKompleks Pusat Pengajian Jejawi 302600 ArauPerlisMalaysia

Presently,the global search for alternative renewable energy sources is rising due to the depletion of fossil fuel and rising greenhouse gas(GHG)*** alternatives,hydrogen(H2)produced from biomass gasification is considered a green energy sector,due to its environmentally friendly,sustainable,and renewable ***,tar formation along with syngas is a severe impediment to biomass conversion efficiency,which results in process-related ***,tar consists of various hydrocarbons(HCs),which are also sources for ***,catalytic steam reforming is an effective technique to address tar formation and improve H2 production from biomass *** the various classes in existence,supported metal catalysts are considered the most *** paper focuses on the current researching status,prospects,and challenges of steam reforming of gasified biomass ***,it includes recent developments in tar compositional analysis,supported metal catalysts,along with the reactions and process conditions for catalytic steam ***,it discusses alternatives such as dry and autothermal reforming of tar.

关键词： hydrogen biomass gasification tar steam reforming catalyst

Quality Control of Gamma Camera with SPECT Systems

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2017年第3期6卷 225-232页

作者： md. Razibul Hasan md. Harunor Rashid Khan md. Rashedur Rahman md. Shohel parvez md. Rakibul Islam Ashoke Kumar Paul Physics Discipline Khulna University Khulna Bangladesh Institute of Nuclear Medicine & Allied Sciences Khulna Bangladesh

Quality control of Gamma Camera with SPECT System is highly valuable for assurance performance characteristic. We report the performance characteristic of gamma camera by intrinsic calibration and verification measurement. The study has been done using the data from Siemens Symbia S Series gamma camera by using a point source 99mTc at the Institute of Nuclear Medicine & Allied Sciences (INMAS), Khulna, Bangladesh. From intrinsic calibration and verification flood series, the integral uniformity for the central field of view (CFOV) has been found in between 4.01% and 2.88% and for the useful field of view (UFOV) has been in between 4.77% and 4.30%. The differential uniformity for the CFOV has been in between 1.53% and 2.04% and for the UFOV has been in between 2.32% and 2.77%. According to Operating Instruction Symbia System S Series manual, uniformity can compensate for values exceeding 10%, however while integral uniformity exceed 7%, have to contract Siemens customer service representative. In conclusion, these results show that the intrinsic uniformity of the gamma camera under this condition is within an acceptable range;thus the gamma camera working in INMAS is performed well.

关键词： Gamma Camera SPECT Quality Control Intrinsic Uniformity

Rice Transplanting Mechanization in Bangladesh: Way to Make It Sustainable

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Agricultural Sciences 2022年第2期13卷 130-149页

作者： md. anwar Hossen md. Mahir Shahriyar Sharmin Islam Haimonti Paul md. Mizanur Rahman Farm Machinery and Post-Harvest Technology Division Bangladesh Rice Research Institute (BRRI) Gazipur Bangladesh

“Rice transplanter” has brought a radical change in the method of rice seedlings transplanting in Bangladesh. The machine is gaining popularity with the increase of labor crisis during the peak period of transplanting, reduction time of in-between crops, rapid urbanization and industrialization, and changing socio-economic status of the farmers. Alternatively, the traditional way of rice transplanting is labor-intensive and involves high drudgery. Mechanical rice transplanter is cost-effective and operation-friendly. It is suitable to plant young seedlings maintaining plant to plant and line to line distance which plays an important role in increasing yield. Moreover, it is easy to take care of the crops planted in rows. It helps in maintaining soil physical properties and is considered to be better from a crop management and productivity point of view. In malignancy of having an edge over the traditional broadcasting, the adoption rate of mechanical transplanters is low due to high primary investment, lack of knowledge in growing mat type nursery, lack of repair and maintenance facility to the end-users, and unavailability of spare parts. Imparting these, available supply, entrepreneurship development, and encouraging custom hire services may be some of the practical results for adding the rice area under mechanical transplanting. This review summarizes the problems and prospects associated with seedling rice transplanting, technological gaps in the adoption of mechanical transplanters in a sustainable manner, and future ways to make transplanters more user-friendly and cost-effective.

关键词： Rice Establishment Transplanter Mechanization Mat Type Seedling Operator Training

A case of cerebral malaria and dengue concurrent infection

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Asian Pacific Journal of Tropical Biomedicine 2013年第5期3卷 416-417页

作者： anwar Alam md.Dm Department of Neurology Ruban Emergency Hospital

Cerebral malaria and dengue are the common infections which cause higher mortality and morbidities in every part of the world especially in *** infection of cerebral malaria and dengue is rare entity due to different habitat of vectors and it was reported rarely from Southeast *** this case report,the authors reported a case of concurrent cerebral malaria and dengue which was recovered after eight days of admission with increase in morbidity.

关键词： Cerebral malaria Dengue Concurrent infection

Determination of Optimum Seed Rate of Hybrid Rice (Oryza sativa L.) Varieties in Mat-Type Seedling Raising for Mechanical Transplanting

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Agricultural Sciences 2022年第10期13卷 1031-1047页

作者： md. anwar Hossen md. Kamruzzaman Sharmin Islam Haimonti Paul md. Mahir Shahriyar Arafat Ullah Khan Farm Machinery and Post-harvest Technology Division Bangladesh Rice Research Institute (BRRI) Gazipur Bangladesh

Rice is the most important and crucial to ensuring food and dietary energy security in most developing countries and is the staple food of more than half of the world’s population. This study was conducted to identify the seed rate of hybrid rice varieties for mechanical transplanting during Boro (irrigated dry season), 2021-22 season at BRRI research field, Gazipur. Slender grain type BRRI hybrid dhan3, BRRI hybrid dhan5, Ishpahani hybrid dhan6, and BRRI dhan89 were used in the study. The same growth medium was used to establish mat-type seedlings on plastic trays (280 × 80 × 25 mm) at seed rates of 80, 90, 100, 110, and 120 g∙tray−1. Walk-behind type 04 rows rice transplanter (Daedong, model-DP 488) was used during transplanting in the field at the set of the plant to plant spacing of 140 mm while line-to-line spacing was fixed to 300 mm. The result depicted that regardless of the variety, seedling density increased linearly as seed rate increased, except for the 21 days following sowing. However, the seedling density of BRRI dhan89 decreased after the seed rate of 100 g∙tray−1 due to mortality. The seedling height of the BRRI hybrids dhan5 and Ishpahani hybrid dhan6 was significantly higher than that of the BRRI hybrid dhan3 and BRRI dhan89. After 21 days, the seedling height decreased significantly with the increase in seed rate. For the seed rates of 100, 110, and 120 g∙tray−1, identical numbers of hills per unit area and plants per hill were observed. On the other hand, regardless of the variety, the percentage of missing hills considerably decreased with the increased seed rate. The yield of the BRRI hybrid dhan5 variety was significantly higher at the seed rates of 100 and 110 g∙tray−1, although the yield of the Ishpahani hybrid dhan6 variety was comparable. In terms of yield among the four varieties, BRRI hybrid dhan5 gave a higher yield followed by Ishpahani hybrid

关键词： Slender Type Grain Seedling Density Seedling Height Missing Hill Plants Per Hill Yield