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SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES

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International Journal of Sediment Research 2007年第3期22卷 169-179页

作者： Liton Kumar SARKER M. Monowar HOSSAIN M. Anisul haque Assis. Engg. Bangladesh Water Development Board (BWDB) Lakshmipur Bangladesh Prof. Department of Water Resources Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh Prof. Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh

Experiments on initiation of motion of different fractions of non-uniform sediment mixtures are reported. Four sediment mixes and reference transport method to define the threshold of bed particle movement are used in this analysis. Factors controlling the initiation of motion are analyzed. It is found that relative size of different grains with respect to a median size greatly affects the initiation of movement. The incipient motion of non-uniform sediment is very much dependent on the absolute size for coarser fractions. Considering the factors controlling the initiation of motion the experimental data sets along with the other available data yield a new relationship for the calculation of critical shear stress of non-uniform sediments. A set of equations have found that all the data points fall into a single line for the finer and for coarser fractions.

关键词： Non-uniform sediment Critical shear stress Incipient motion Reference shear stress Reference Transport Method (RTM)

Biochemical and histopathological profiling of Wistar rat treated with Brassica napus as a supplementary feed

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Food Science and Human Wellness 2018年第1期7卷 77-82页

作者： Kazi Md.Mahmudul Hasan Nasrin Tamanna MdAnwarul haque Department of Biotechnology and Genetic Engineering Faculty of Applied Science and TechnologyIslamic UniversityKushtia7003Bangladesh Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong

Metabolic changes together with cardiovascular and hepatic factors are related to the development of diseases like myocardial lipidosis,heart disease,and profound *** aim of this animal study is to determine the effects of high erucic acid containing rapeseed oil(Brassica napus L.)varieties on liver,kidney and heart muscles in Wistar *** Wistar rats were divided into three groups where each group containing four *** A was considered as control diet group,while Group B rapeseed wild oil group and Group C rapeseed hybrid oil group were considered as experimental diet *** levels of aspartate aminotransferase(AST),alanine aminotransferase(ALT),alkaline phosphatase(ALP),creatine kinase-MB(CK-MB)and creatinine of two experimental groups were significantly elevated while compared to the control groups(p0.05).Noticeable tissue injury observed in this study is a sign of the relative toxicity of erucic acid containing rapeseed oil to mammalian *** use of Brassica napus as a supplementary feed ingredient should be,therefore,thoroughly considered.

关键词： Rapeseed oil Rattus norvegicus Serum enzymes Erucic acid Tissue profiling

Mortality following combined fractures of the hip and proximal humerus

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World Journal of Orthopedics 2020年第10期11卷 426-430页

作者： Aziz haque Harvinder Pal Singh Department of Orthopaedic Surgery University Hospitals of LeicesterLeicester B170RHUnited Kingdom

BACKGROUND Hip fractures and proximal humerus fractures are known to be associated with increased mortality,but the impact on mortality of combining these two common injuries is not well *** To compare mortality,inpatient stay and discharge destination for patients with combined hip and proximal humerus fractures with those sustaining isolated hip *** Using the United Kingdom national hip fracture database,we identified all hip fracture patients over the age of 60 admitted to a single trauma unit from *** sustaining a proximal humerus fracture in addition to their hip fracture were identified using hospital coding *** calculated the 30-d and one-year mortality for both the hip fracture cohort and the combined hip and proximal humerus fracture *** variables recorded included age,gender and whether the proximal humerus was treated with or without an *** We identified 4131 patients with hip fractures within the study period and out of those 40 had sustained both a hip and a proximal humerus *** age in the hip fracture cohort was 80.9 years and in the combined fracture group 80.3 *** of the 40 patients in the combined group four were treated *** 30-d mortality for our hip fracture cohort was 7.2%compared to the mortality of our combined cohort of 12.5%(P=0.163).The one-year mortality for our hip fracture cohort was 26.4%compared to 40%for the combined fracture cohort(P=0.038).We also found patients with combined injuries were less likely to return to their own *** The 30-d and one-year mortality is higher for those patients who have sustained a combined hip and proximal humerus fracture when compared to those with a hip fracture alone.

关键词： Hip fracture Proximal humerus fracture Mortality Return to home Orthopaedics Trauma

Role of mushrooms in soil mycoremediation:a review

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应用与环境生物学报 2020年第2期26卷 460-468页

作者： Minhaz Uddin Dan Zhang Ram Proshad M.K.haque Institute of Mountain Hazards and Environment Chinese Academy of Sciences&Ministry of Water ConservancyChengdu 610041China School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Department of Crop Science and Technology University of RajshahiRajshahi-6025Bangladesh

Bioremediation is an innovative and promising technology available for the removal and recovery of heavy metals from contaminated media. Bioremediation uses organisms to absorb heavy metals at low cost and with no secondary pollution. Bioremediation by macrofungi that degrade pollutants or wastes is referred to as mycoremediation. Macrofungi, like mushrooms, can produce enzymes and have the ability to degrade and accumulate a wide range of toxic metals. In this paper, the research status and advances in the field of mycoremediation using different mushroom species are reviewed. Generally mushrooms use three effective strategies to recover contaminated or polluted soils: biodegradation, bioconversion, and biosorption. Mushrooms can degrade and recycle wastes and pollutants to their mineral constituents and convert wastes, sludge, and pollutants into useful forms. In addition, they can uptake heavy metals from substrates via biosorption, which is a very effective method to reclaim polluted lands. Different wild and cultivated mushroom species are used in mycoremediation, which can degrade large quantities of organic and inorganic pollutants and produce vendible products. Mycoremediation is still in its infancy, but it has notable remediation potential for pollutants or metals in soil. Mushroom species that can biodegrade, bioconvert, or absorb pollutants and metals effectively should be given the highest preference. Further research is needed to verify that this method is an easy, cost effective,and eco-friendly tool.

关键词： bioremediation mycoremediation heavy metal mushroom

Aid effectiveness and programmatic effectiveness:a proposed framework for comparative evaluation of different aid interventions in a particular health system

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Global Health Research and Policy 2017年第1期2卷 285-291页

作者： Hasibul haque Philip CHill Robin Gauld Department of Preventive and Social Medicine Dunedin School of MedicineUniversity of OtagoDunedin 9016New Zealand Centre for International Health University of OtagoDunedin 9016New Zealand Dean’s Office School of BusinessUniversity of OtagoDunedin 9016New Zealand

Background:Against a backdrop of changing concepts of aid effectiveness,development effectiveness,health systems strengthening,and increasing emphasis on impact evaluation,this article proposes a theory-driven impact evaluation framework to gauge the effect of aid effectiveness principles on programmatic outcomes of different aid funded programs in the health sector of a particular ***:The foundation and step-by-step process of implementing the framework are ***:With empirical evidence from the field,the steps involve analysis of context,program designs,implementation mechanisms,outcomes,synthesis,and interpretation of findings through the programs’underlying program theories and interactions with the state context and health ***:The framework can be useful for comparatively evaluating different aid interventions both in fragile and non-fragile state contexts.

关键词： Paris principles Aid effectiveness Impact evaluation Development effectiveness Health systems strengthening Fragile states Realist evaluation

Continuum modeling of freeway traffic flows:State-of-the-art,challenges and future directions in the era of connected and automated vehicles

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Communications in Transportation Research 2023年第1期3卷 187-211页

作者： Saeed Mohammadian Zuduo Zheng Md.Mazharul haque Ashish Bhaskar School of Civil and Environmental Engineering Queensland University of TechnologyBrisbane4000Australia School of Civil Engineering The University of QueenslandBrisbane4072Australia

Connected and automated vehicles(CAVs)are expected to reshape traffic flow dynamics and present new challenges and opportunities for traffic flow *** numerous studies have proposed optimal modeling and control strategies for CAVs with various objectives(e.g.,traffic efficiency and safety),there are uncertainties about the flow dynamics of CAVs in real-world *** uncertainties are especially amplified for mixed traffic flows,consisting of CAVs and human-driven vehicles,where the implications can be significant from the continuum-modeling perspective,which aims to capture macroscopic traffic flow dynamics based on hyperbolic systems of partial differential *** paper aims to highlight and discuss some essential problems in continuum modeling of real-world freeway traffic flows in the era of *** first provide a select review of some existing continuum models for conventional human-driven traffic as well as the recent attempts for incorporating CAVs into the continuum-modeling *** applicable,we provide new insights about the properties of existing models and revisit their implications for traffic flows of CAVs using recent empirical observations with CAVs and the previous discussions and debates in the *** paper then discusses some major problems inherent to continuum modeling of real-world(mixed)CAV traffic flows modeling by distinguishing between two major research directions:(a)modeling for explaining purposes,where making reproducible inferences about the physical aspects of macroscopic properties is of the primary interest,and(b)modeling for practical purposes,in which the focus is on the reliable predictions for operation and *** paper proposes some potential solutions in each research direction and recommends some future research topics.

关键词： Continuum model Macroscopic traffic flow model Traffic flow Connected and automated vehicles Autonomous vehicles Automated vehicles

ROLE OF SYNTHETIC ANTIOXIDANTS ON THE AGING PROPERTY OF ELECTRON BEAM IRRADIATED NATURAL RUBBER

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Chinese Journal of Polymer Science 2005年第4期23卷 363-366页

作者： M.E.haque K.Makuuchi F.Yoshii H.Mitomo Takasaki Radiation Chemistry Research Establishment Department of Biological and Chemical Engineering

The aging property of radiation vulcanized natural rubber was studied using various kinds of *** test was done at 100℃ for various lengths of *** was found that some antioxidants are excellent in preventing the oxidative degradation of the irradiated ***(2,5-di-tert-amylhydroquinone)+CBP(2,2'-dihydroxy-3,3'-di(-methyl- cyclohexyl)-5,5'-dimethyl diphenyl methane)+P16(tris(2,4-di-tert-butylphenyl)phosphate)in a proportion of(1:0.5:0.5) was found to be the best combination to achieve 100% retention of tensile strength.

关键词： Aging Rubber Radiation Antioxidant Tensile

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

Antioxidant compounds and minerals in tomatoes by Trichodermaenriched biofertilizer and their relationship with the soil environments

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Journal of Integrative Agriculture 2017年第3期16卷 691-703页

作者： Yeakub Khan Manjurul haque Abul Hossain Molla Mizanur Rahman Mohammad Zahangeer Alam Department of Environmental Science Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706 Bangladesh Department of Soil Science Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706 Bangladesh

The experiment was conducted to evaluate the efficacy of Trichoderma-enriched biofertilizer（BioF/compost）on antioxidants and minerals in ripe tomatoes and soil health improvements in terms of nutrient availability and microbial *** study was comprised of six treatments：control（zero input）;recommended doses of NPK（135.5,45.6 and 22.9 kg ha^-1,respectively）;100%BioF/compost;75%BioF/compost＋25%N;50%BioF/compost＋50%N;and 25%BioF/compost＋75%*** recommended doses of P and K were used in the last three *** was found that the application of 100%BioF/compost enhanced plant growth,leaf greenness,and produced 12.9%higher yield compared to the recommended doses of NPK and other *** contents（P,K,Ca,Mg,Cu,Fe,Mn and Zn）in tomato roots,shoots and fruits and antioxidant compounds,i.e.,ascorbic acid,β-carotine,and lycopene were increased significantly in fruits fertilized with100%BioF/*** high efficiency of Trichoderma compost might be the result of its potential of nutrient solubilization and harboring soil ***,BioF/compost increased soil fertility and favored growth of microbes in the rhizosphere which ultimately contributed to higher yield,antioxidant,and mineral concentrations in ***,Trichoderma-enriched biofertilizer may reduce application of chemical fertilizers and therefore,can be considered as a noble practice in sustainable agriculture.

关键词： Trichoderma harzianum T22 minerals .antioxidants nutrient availability microbial populations