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Bulk density of mineral and organic soils in the Canada’s arctic and sub-arctic

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Information Processing in Agriculture 2015年第3期2卷 183-190页

作者： m.F.hossain W.Chen Yu Zhang American International University-Bangladesh Kemal Ataturk AvenueH 58/BR 21BananiDhaka 1213Bangladesh Canada Center for mapping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Bulk density is an indicator of soil compaction subject to anthropogenic impact,essential to the interpretation of any nutrient budgets,especially to perform carbon *** is so expensive to measure bulk density in arctic/sub-arctic and there are relatively very few field measurements are ***,to establish a bulk density and SOC empirical relationship in Canada’s arctic and sub-arctic ecosystems,compiled all the bulk density and SOC measurements that are available in Northern *** addition an attempt has been made for bulk density and SOC field measurement in Yellowknife and Lupin,to develop an empirical relationship for Canada’s arctic and *** between bulk density(BD)and soil organic carbon(SOC)for mineral soil and organic soils(0–100 cm depth)were described by exponential *** best fit model,predictive bulk density(BDp),for mineral soil,(BDp=0.701+0.952 exp(0.29 SOC),n=702,R2=0.99);for organic soil(BDp=0.074+2.632 exp(0.076 SOC),n=674,R2=0.93).Different soil horizons have different bulk densities and may require different predictive equations,therefore,developed predictive best fit exponential equation for both mineral and organic soils together(BDp=0.071+1.322 exp(0.071 SOC),n=1376,R2=0.984),where X is a dummy variable with a value of 0 for surface peat(0–25 cm depth)and 1 for subsurface peat(25–175 cm).We recommend using the soil organic carbon density approach to estimate BD from SOC because it allows BD to be predicted without significant bias.

关键词： Bulk density mineral and organic soils Canada’s arctic and sub-arctic

Uncertainty assessment of a polygon database of soil organic carbon for greenhouse gas reporting in Canada’s Arctic and sub-arctic

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Information Processing in Agriculture 2014年第1期1卷 34-41页

作者： m.F.hossain Yu Zhang W.Chen American International University-Bangladesh Kamal Ataturk AvenueBananiDhaka 1213Bangladesh Canada Center for mapping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Canada’s Arctic and sub-arctic consist 46%of Canada’s landmass and contain 45%of the total soil organic carbon(SOC).Pronounced climate warming and increasing human disturbances could induce the release of this SOC to the atmosphere as greenhouse *** is committed to estimating and reporting the greenhouse gases emissions and removals induced by land use change in the Arctic and *** assess the uncertainty of the estimate,we compiled a site-measured SOC database for Canada’s north,and used it to compare with a polygon database,that will be used for estimating SOC for the UNFCCC *** 10 polygons where 3 or more measured sites were well located in each polygon,the site-averaged SOC content agreed with the polygon data within±33%for the top 30 cm and within±50%for the top 1 m *** we directly compared the SOC of the 382 measured sites with the polygon mean SOC,there was poor agreement:The relative error was less than 50%at 40%of the sites,and less than 100%at 68%of the *** relative errors were more than 400%at 10%of the *** comparisons indicate that the polygon database is too coarse to represent the SOC conditions for individual *** difference is close to the uncertainty range for *** spatial database could be improved by relating site and polygon SOC data with more easily observable surface features that can be identified and derived from remote sensing imagery.

关键词： Arctic and sub-arctic SOC Uncertainty analysis

Allelopathic effects of mikania cordata on forest and agricultural crops in Bangladesh

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Journal of Forestry Research 2016年第1期27卷 155-159页

作者： m.K.hossain S.Anwar R.Nandi Institute of Forestry and Environmental Sciences University of Chittagong

mikania cordata, an invasive weed is becom- ing a problem in the secondary degraded forests and plantations of Bangladesh, not only competing with but also releasing allelochemicals to cultivated crops. Allelo- pathic effects of the leaves of m. cordata were investigated through an experiment in the green house of the Institute of Forestry and Environmental Sciences, University of Chit- tagong, Bangladesh. Five economically important agricul- tural crops （Oryza sativa L., Triticum aestivum L., Vigna sinensis L., Abelmoschus esculentus L. and Amaranthus tricolor L.） and three forest crops （Acacia auriculiformis A. Cunn. ex Benth. ＆ Hook, Albizia procera （Roxb.） Benth., and Paraserianthes falcataria （L.） Nielson） were used as bioassay species. Experiments were conducted on trays at an average room temperature 27 ~C. The effects of dif- ferent concentrations of leaf extracts were compared to controls. Water soluble allelochemicals of m. cordata inhibited the germination and initial growth of the tested agricultural and forest crops. Germination percent of forest crops declined with increasing concentration of extracts. The inhibitory effect on root elongation of forest crops was pronounced, whereas a stimulatory effect was found on P. falcataria up to a concentration of 25 %. Abelmoschus esculentus showed poor germination （%） and low shoot development （0.5 cm） and no development of taproot or lateral roots at treatment of 100 % concentration. Theinhibitory effect was proportional to the concentrations of the extracts with higher concentrations producing stronger inhibitory effects. Lower concentrations showed some stimulatory effect. The inhibitory effect was pronounced in root and lateral root development rather than germination or shoot development of the crops. mikania cordata should be eradicated for healthy growth and development of the forest and adjacent agricultural crops.

关键词： mikania cordata Allelopathy Agriculturalcrops Forest crops Germination Growth inhibition

Three-phase Four-wire Interlinking Converter with Enhanced Power Quality Improvement in microgrid Systems

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1064-1077页

作者： Jiannan Liu Seyedfoad Taghizadeh Junwei Lu m.J.hossain Sascha Stegen Hui Li School of Engineering and Built Environment Griffith UniversityBrisbane 4111Australia Schhool of Engineering Macquaire UniversitySydney 2109Australia. School of Electrical and Data Engineering University of Technology SydneySydney 2007Australia Shanghai Engineering Research Center of Intelligent management and Control for Power Process Shanghai University of Electric PowerShanghai 200090China.

This paper presents an advanced three-phase four-wire interlinking niicrogrid system with an improved harmonics reduction *** to their robustness and simplicity features,time-domain second-order notch-filter equivalent techniques have drawn a great deal of research ***,the drawbacks of non-satisfactory harmonics rejection characteristics and dynamic response limits their *** this context,this paper proposes an advanced control system with an enhanced harmonics reduction feature for microgrid *** proposed control system exhibits a superior harmonics reduction feature and better dynamic response than the conventional notch-filter based *** addition,a control scheme is developed for a three-phase power system application which presents higher accuracy in compensating both balanced and unbalanced *** performance of the proposed system is validated through simulations and tested on the hardware of a real microgrid *** the results,it is evident that the proposed approach provides excellent performance in terms of harmonics reduction in microgrid systems.

关键词： Grid-connected microgrid harmonics reduction notch filter power management

Industrial IoT Based Condition monitoring for Wind Energy Conversion System

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CSEE Journal of Power and Energy Systems 2021年第3期7卷 654-664页

作者： md Liton hossain Ahmed Abu-Siada S.m.muyeen md mubashwar Hasan momtazur Rahman Department of Electrical and Computer Engineering Curtin UniversityPerthAustralia School of Science Engineering and ITFederation UniversityAustralia Edith Cowan University Australia

Wind energy has been identified as the second dominating source in the world renewable energy generation after *** and distribution of wind energy has brought technology revolution by developing the advanced wind energy conversion system(WECS)including multilevel inverters(mLIs).The conventional rectifier produces ripples in their output waveforms while the mLI suffers from voltage balancing issues across the DC-link *** paper proposes a simplified proportional integral(PI)-based space vector pulse width modulation(SVPWm)to minimize the output waveform ripples,resolve the voltage balancing issue and produce better-quality output *** experiences various types of faults particularly in the DC-link capacitor and switching devices of the power *** faults,if not detected and rectified at an early stage,may lead to catastrophic failures to the WECS and continuity of the power *** paper proposes a new algorithm embedded in the proposed PI-based SVPWm controller to identify the fault location in the power converter in real *** most wind power plants are located in remote areas or offshore,WECS condition monitoring needs to be developed over the internet of things(IoT)to ensure system *** this paper,an industrial IoT algorithm with an associated hardware prototype is proposed to monitor the condition of WECS in the real-time environment.

关键词： Asset management condition monitoring fault diagnosis industrial internet of things(IoT) wind energy conversion system

Analysis of opto-thermal interaction of porcine stomach tissue with 808-nm laser for endoscopic submucosal dissection

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Journal of Innovative Optical Health Sciences 2015年第6期8卷 81-91页

作者： Seongjun Kim m.Tamim hossain Don Haeng Lee Jung Kyung Kim Department of mechanical Engineering Graduate School Kookmin University Seoul 136-702Republic of Korea Department of Integrative Biomedical Science and Engineering Graduate SchoolKookmin University Seoul 136-702Republic of Korea Division of Gastroenterology Department of Internal medicine Inha University School of medicine National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders Utah-Inha DDS&Advanced Therapeutics Research Center 27 Inhang-ro Jung-guIncheon 400-711Republic of Korea Department of mechanical Engineering Kookmin University Seoul 136-702 Republic of Korea

In endoscopic submucosal dissection(ESD),the narrow gastrointestinal space can cause difficulty in surgical *** ablation apparatuses with high-power CO_(2) lasers or Nd:YAG lasers have been developed to facilitate endoscopic surgical *** studied the interaction of 808-nm laser light with a porcine stomach tissue,with the aim of developing a therapeutic medical device that can remove lesions at the gastrointestinal wall by irradiating a near-infrared laser light incorporated in an endoscopic *** perforation depths at the porcine fillet and the stomach tissues linearly increased in the range of 2–8mm in proportion to the laser energy density of 63.7–382 kJ/cm^(2).Despite the distinct structural and compositional di®erence,the variation of the perforation depth between the stomach and the fillet was not found at 808-nm wavelength in our *** further studied the laser–tissue interaction by changing the concentration of the methyl blue solution used conventionally as a submucosal fluidic cushion(SFC)in ESD *** temperature of the mucosal layer increased more rapidly at higher concentration of the methyl blue solution,because of enhanced light absorption at the SFC *** insertion of the SFC would protect the muscle layer from thermal *** confirmed that more effective laser treatment should be enabled by tuning the opto-thermal properties of the *** study can contribute to the optimization of the driving parameters for laser incision techniques as an alternative to conventional surgical interventions.

关键词： Near-infrared laser surgical intervention laser-tissue interaction submucosal fluid cushion temperature distribution

Effects of shifting cultivation on biological and biochemical characteristics of soil microorganisms in Khagrachari hill district, Bangladesh

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Journal of Forestry Research 2014年第3期25卷 689-694页

作者： Sohag miah S.m. Sirajul Haque Wahida Sumi mohammad mosharraf hossain Institute of Forestry and Environmental Sciences University of Chittagong Department of microbiology University of Chittagong Department of Applied Physics Graduate School of Engineering Osaka University

We collected soil samples from two representative sites at Aatmile of Khagarachari hill district in Chittagong Hill Tracts. One of the sites was under shifting cultivation and the other an adjacent 13-year old teak plantation. Both sites were in the same physiographic condition and same aspect with parable soil type, which enabled us to measure the effects of shifting cultivation on soil micro-flora. We studied soil phys-ico-chemical properties and the biochemical and biological properties of soil microbes. moisture and organic matter content as well as fungi and bacterial populations, both in surface and subsurface soils, were signifi-cantly （p≤0.001） lower in shifting cultivated soils compared to soils not under shifting cultivation, i.e. the teak plantation site. The most abundant bacteria in surface （0-10 cm） and sub-surface （10-20 cm） soils under shifting cultivation were Pseudomonas diminuta and Shigella, respec-tively, while in corresponding soil layers of teak plantation, predominant microbes were Bacillus firmus （0-10 cm） and Xanthomonas （10-20 cm）. The microbial population differences cannot be explained by soil texture differences because of the textural similarity in soils from the two sites but could be related to the significantly lower moisture and organic mat-ter contents in soils under shifting cultivation.

关键词： shifting cultivation soil biological properties soil biochemical properties soil microflora Chittagong Hill Tracts

Biomass-derived carbon doping to enhance the current carrying capacity and flux pinning of an isotopic mg^(11)B_(2)superconductor

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Journal of magnesium and Alloys 2022年第7期10卷 1868-1877页

作者： m.Shahbazi Y.Hao D.Patel H.Liang Y.Yamauchi m.S.A.hossain QUT Centre for materials Science and School of Chemistry and Physics Queensland University of Technology(QUT)BrisbaneQLD 4001Australia School of mechanical and mining Engineering Faculty of EngineeringArchitecture and Information Technology(EAIT)The University of QueenslandBrisbaneQLD 4072Australia Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQLD 4072Australia JST-ERATO Yamauchi materials Space-Tectonics Project and International Center for materials Nanoarchitectonics(WPI-mANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbaraki 305-0044Japan

Low activation isotopic boron(11B)based magnesium diboride(mg^(11)B_(2))superconductors doped with biomass-derived activated carbon were synthesized using11B and magnesium powder via solid-state *** effect of carbon doping on the lattice structure and superconducting properties of mg^(11)B_(2)bulks were evaluated using X-ray powder diffraction,high resolution transmission electron microscopy,scanning electron microscopy and magnetization *** refinement of structural parameters indicates successful substitution of carbon in mg^(11)B_(2)*** critical current density(Jc)of carbon doped mg^(11)B_(2)synthesized at 650℃was enhanced more than two times compared with the pure mg^(11)B_(2)*** improvement was observed for the mg^(11)B_(2)bulks heat-treated at 800℃.This enhancement is due to successful substitution of biomass-derived carbon with high surface area into mg^(11)B_(2)*** flux pinning mechanism of pure and doped mg^(11)B_(2)bulks were investigated using the Dew-Hughes *** study provides information regarding enhancement of the Jc of low activation mg^(11)B_(2)superconductors suitable for next-generation fusion magnets.

关键词： magnesium diboride Critical current Flux pinning mechanism Fusion reactor applications

Achievements and trends of solid oxide fuel cells in clean energy field: a perspective review

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Frontiers in Energy 2020年第2期14卷 359-382页

作者： Abdalla m.ABDALLA Shahzad hossain Pg mohdIskandr PETRA mostafa GHASEmI Abul K.AZAD Faculty of Integrated Technologies Universiti Brunei DarussalamJalanTungku LinkGadong BE 1410Brunei Darussalam mechanical Engineering Department Faculty of EngineeringSuez Canal UniversityIsmailia 41522Egypt Institute of Nuclear Science and Technology Bangladesh Atomic Energy CommissionGPO Box No 3787Dhaka 1000Bangladesh Petroleum Engineering Department Universiti Teknologi PETRONASSeri Iskandar31750 TronohPerakMalaysia

The main concerns in the world today,especially in the energy field,are subjected to clean,efficient,and durable sources of *** three aspects are the main goals that scientist are paying attention ***,the various types of energy resources include fossil and sustainable ones,but still some challenges are chasing these kinds from energy conversion,storage,and ***,the most reliable and considered energy resource nowadays is the utilized one which is as highly efficient,clean,and everlasting as ***,in this review,an attempt is made to highlight one of the promising types as a clean and efficient energy *** oxide fuel cell(SOFC)is the most efficient type of the fuel cell types involved with hydrogen and hydrocarbon-based fuels,especially when it works with combined heat and power(CHP).The importance of this type is due to its nature of work as conversion tool from chemical to electrical for generation of power without noise,pollution,and can be safely handled.

关键词： solid oxide fuel cells(SOFCs) clean energy design micro-scale nano-scale performance