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Particuology 2020年第5期18卷 57-66页

作者： Shaikh A.Razzak Saddam A.AI-Hammadi Syed m.Rahman mohammad R.Quddus mohammad m.hossain Jesse Zhu Department of Chemical Engineering King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Center for Environment&Water RIKing Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Department of Chemical and Biochemical Engineering University of Western OntarioCanada

Understanding scale-up effects on the hydrodynamics of a liquid-solid circulating fluidized bed(LSCFB)unit requires both experimental and theoretical *** implement multigene genetic programming(mGGP)to investigate the solid holdup and distribution in three LSCFB systems with different *** addition to data obtained here,we also use a portion of data sets of LSCFB systems developed by Zheng(1999)and Liang et al.(1996).model predictions are in good agreement with the experimental data in both radial and axial directions and at different normalized superficial liquid and solid *** radial profiles of the solid holdup are approximately identical at a fixed average cross-sectional solid holdup for the three LSCFB systems *** performance indicators including the mean absolute percentage error(6.19%)and correlation coefficient(0.985)are within an acceptable *** results suggest that a mGGP modeling approach is suitable for predicting the solid holdup and distribution of a scaled-up LSCFB system.

关键词： Fluidization Liquid-solid circulating fluidized bed multigene genetic programming Scale-up effect Normalized superficial liquid velocity Solid holdup

Fog-Based Secure Framework for Personal Health Records Systems

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Computers, materials & Continua 2021年第2期66卷 1937-1948页

作者： Lewis Nkenyereye S.m.Riazul Islam mahmud hossain mAbdullah-Al-Wadud Atif Alamri Department of Computer&Information Security Sejong UniversitySeoul05006Korea Department of Computer Science and Engineering Sejong UniversitySeoul05006Korea Department of Computer Science University of Alabama at BirminghamBirminghamAL35294USA Department of Software Engineering King Saud UniversityRiyadh11543Saudi Arabia

The rapid development of personal health records(PHR)systems enables an individual to collect,create,store and share his PHR to authorized *** care systems within the smart city environment require a patient to share his PRH data with a multitude of institutions’repositories located in the *** cloud computing paradigm cannot meet such a massive transformative healthcare systems due to drawbacks including network latency,scalability and *** computing relieves the load of conventional cloud computing by availing intermediate fog nodes between the end users and the remote *** a massive demand of PHR data within a ubiquitous smart city,we propose a secure and fog assisted framework for PHR systems to address security,access control and privacy *** under a fog-based architecture,the proposed framework makes use of efficient key exchange protocol coupled with ciphertext attribute based encryption(CP-ABE)to guarantee confidentiality and fine-grained access control within the system *** also make use of digital signature combined with CP-ABE to ensure the system authentication and users *** provide the analysis of the proposed framework in terms of security and performance.

关键词： Fog computing personal health records ciphertext attribute based encryption secure communications

Thermoluminescence Response of Germanium-Doped Optical Fibers to X-Ray Irradiation

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Chinese Physics Letters 2012年第7期29卷 284-286页

作者： m.A.Saeed N.A.Fauzia I.hossain A.T.Ramli B.A.Tahir Department of Physics Universiti Teknologi MalaysiaSkudai-81310JohorMalaysia Department of Physics College of Sciences and ArtsKing Abdulaziz UniversityRabigh 21911P.O.Box No.344KSA

We present the characteristics of the thermoluminescence (TL) response of Ge-doped optical fibers with various energies and exposures of photon *** investigate the Ge-doped SiO2 as an efficient TL material,the TL responses are compared with commercially available standard TLD100 *** Ge-doped optical fiber and TLD100 are placed in gelatin capsules and irradiated with x-ray using a Toshiba model KXO-15R x-ray *** Ge-doped fiber and TLD-100 show linear response as a function of current and time using x-ray photon of energy 60,80 and *** irradiated with 60,80 and l00kV x-ray energy at various currents (mA ),tube distance (cm) and exposure time (second) ranges,TLD100 media provide a TL yield up to two times that of Ge-doped *** energy response of the Ge-doped fibers is linear and similar over the 60-l00 kVenergy range,and its sensitivity is 0.39±0.05 of the TLD100 *** glow curves of TLD 100 and doped optical fiber are also compared.

关键词： fiber fibers photon

The ASEAN experience of the purchasing power parity theory

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Financial Innovation 2018年第1期4卷 333-343页

作者： S.m.Woahid murad mohammad amzad hossain Department of Economics Noakhali Science and Technology UniversityNoakhali 3814Bangladesh Department of Economics Jahangirnagar UniversitySavarDhaka 1342Bangladesh

We used panel data analysis to evaluate the relative purchasing power parity(PPP)hypothesis of the ten ASEAN member countries between 1973 and *** incorporated the cross-sectionally augmented panel unit root test as proposed by Pesaran(J Appl Econ 22:265-312,2007).For panel cointegration analysis,we employed the four error-correction-based Westerlund(Oxf Bull Econ Stat 69:709-748,2007)panel cointegration *** Westerlund(Oxf Bull Econ Stat 69:709-748,2007)tests are general enough to permit a large degree of heterogeneity,both in the long-run cointegrating relationship and in the short-run dynamics,and dependence within as well as across the cross-sectional *** check the robustness of the results,we further estimated the cointegration test excluding Indonesia and *** findings support our initial ***,all the results overwhelmingly support the relative PPP ***,the monetary authority would be able to implement a self-regulating monetary *** would also be able to control the exchange rates.

关键词： Purchasing power parity Panel unit root test Panel cointegration test ASEAN countries

Nursery practice on seed germination and seedling growth of Dalbergia sissoo using beneficial microbial inoculants

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Journal of Forestry Research 2011年第2期22卷 189-192页

作者： B.m.Khan m.K.hossain m.A.U.mridha Institute of Forestry and Environmental Sciences University of ChittagongChittagong-4331Bangladesh Department of Botany University of Chittagong

Nursery practice using microbial inoculants was performed to find out the efficacy of the inoculants on seed germination and seedling growth of sissoo（Dalbergia sissoo Roxb.）.microbial inoculants or effective microorganisms（Em） are a mixture of many different beneficial microorganisms in a *** seedlings were grown in a mixture of sandy soil and cowdung（3：1） kept in polybags with pouring Em solution at different concentrations（0.1%,0.5%,1%,2%,5% and 10%） before and after a week of sowing the *** germination rate and growth parameters of seedlings were measured,such as,shoot and root length,vigor index,fresh and dry weight of shoot and root and total biomass *** nodulation status influenced by Em was also observed along with the measurement of pigment contents in *** highest germination rate（69%） was observed in 2% Em treatment,followed by 67% and 65% in 1% and 5% *** highest shoot length（33.2 cm） was in 2% Em,whereas highest root length（26.3 cm） was in 1% *** fresh and dry weights from shoot and root,were maximum（4.16 g and 1.57 g;2.12 g and 0.83 g respectively） in 2% Em and were significantly（p ≤ 0.05） different from *** index was highest（4071） in 2% Em,which was significantly（p ≤ 0.05） different from *** dry weight increment was highest in 2% Em treatment,followed by 1% and 5% concentrations of *** number was higher at very low（0.1%） concentration of Em solution but it normally decreased with the increase of Em *** contents of chlorophyll a,chlorophyll b and carotenoid were highest（60.11,17.05 and 42.48 mg·L1respectively） in 2% Em treatment and lowest（39.35,13.55 and 27.29 mg·L-1 respectively） in control ***,low concentration of Em（up to 2%） can be used for getting maximum seed germination rate and seedling development of Dalbergia sissoo Roxb.

关键词： Dalbergia sissoo Roxb. microbial inoculants(Em) germination rate seedling growth leaf's pigment nodulation status

The closed form solutions of simplified mCH equation and third extended fifth order nonlinear equation

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Propulsion and Power Research 2019年第2期8卷 163-172页

作者： A.K.m.Kazi Sazzad hossain m.Ali Akbar md.Abul Kalam Azad Department of mathematics Begum Rokeya UniversityRangpur 5400Bangladesh Department of Applied mathematics University of RajshahiRajshahi 6200Bangladesh

The investigation of closed form solutions for nonlinear evolution equations(NLEEs)is being an attractive subject in the different branches of mathematical and physical *** this article,the enhanced(G'=G)-expansion method has been applied to find the closed form solutions for NLEEs,such as the simplified mCH equation and third extended fifth order nonlinear equations which are very important in mathematical *** closed form solutions with arbitrary parameters are successfully obtained by this method which are expressed in terms of hyperbolic and trigonometric *** is shown that the obtained solutions are more general and fresh and can be helpful to analyze the NLEES in mathematical physics and engineering problems.

关键词： The enhanced(G'/G)-expansion method Simplified mCH equation Third extended fifth order nonlinear equation Nonlinear evolution equation(NLEEs) Closed form wave solutions

Shifting cultivation effects on creek water quality around Barkal Upazila in Chittagong Hill Tracts,Bangladesh

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Journal of Forestry Research 2012年第4期23卷 623-630页

作者： Shyamal Karmakar S.m.Sirajul Haque m.mozaffar hossain Sohag miah Institute of Forestry and Environmental Sciences University of ChittagongChittagong 4331Bangladesh

Abstract： We report the effects of shifting cultivation on water quality in 16 creeks investigated once in 2007 and twice in 2008 in 16 apparently similar small neighboring watersheds, each of 3 to 5 ha, at four locations around Barkal sub-district under Rangamati District of Chittagong Hill Tracts in Bangladesh. Concentrations of 5042- and K＋, and pH in creek water were lower, and NO3-N and Na＋ concentrations were higher in shifting-cultivation land compared to land with either plantation or natu- ral forest or a combination of these cover types. Shifting cultivation effects on some water quality parameters were not significant due to change in land cover of the watershed between two sampling periods either through introduction of planted tree species or naturally regenerated vegetation. Conductivity and concentrations of HCO3- PO43-, Ca2-- and mg2＋ in creek water showed no definite trend between shifting cultivation and the other land cover types. At one area near the Forest Range Office of Barkal, creek water pH was 5.8 under land cover with a com- bination of shifting cultivation and plantation. At this area Na~ concentra- tion in shitting-cultivation land ranged from 32.33 to 33.00 mg-L＂ and in vegetated area from 25.00 to 30.50 mg.L-1 in 2007. At another area, Chaliatali Chara, SO42 concentration in a shifting-cultivation watershed ranged from 4.46 to 10.51 mg-L-1, lower than in a vegetated watershed that ranged from 11.69 to 19.98 mg.L-1 in 2007. S042-concentration in this shifting-cultivation area ranged from 1.28 to 1.37 mg.L^-1 and in the vegetated area from 1.37 to 3.50 mg-L^-1 in 2008.

关键词： Shifting cultivation Creek water quality Chittagong Hill Tracts Riparian vegetation Land cover Bangladesh

Building the metaverse using digital twins at all scales,states,and relations

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Virtual Reality & Intelligent Hardware 2022年第6期4卷 459-470页

作者： Zhihan LV Shuxuan XIE Yuxi LI m.Shamim hossain Abdulmotaleb El SadDIK Department of Game Design Faculty of ArtsUppsala UniversitySweden College of Computer Science and Technology Qingdao UniversityQingdaoChina Department of Software Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia School of Electrical Engineering and Computer Science(EECS) University of OttawaOttawaOntarioCanada

Developments in new-generation information technology have enabled Digital Twins to reshape the physical world into a virtual digital space and provide technical support for constructing the *** objects can be at the micro-,meso-,or *** metaverse is a complex collection of solid,liquid,gaseous,plasma,and other uncertain ***,the metaverse integrates tangibles with social relations,such as interpersonal(friends,partners,and family)and social relations(ethics,morality,and law).This review introduces some principles and laws,such as broken windows theory,small-world phenomenon,survivor bias,and herd behavior,for constructing a Digital Twins model for social ***,from multiple perspectives,this article reviews mappings of tangible and intangible real-world objects to the metaverse using the Digital Twins model.

关键词： Digital twins metaverse Sensor

A Historical Perspective on Development of Systems Engineering Discipline:A Review and Analysis

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Journal of Systems Science and Systems Engineering 2020年第1期29卷 1-35页

作者： Niamat Ullah Ibne hossain Raed m.Jaradat michael A.Hamilton Charles B.Keating Simon R.Goerger Department of Industrial and Systems Engineering Mississippi State UniversityPO Box 9542Mississippi State 39762USA Department of Industrial and Systems Engineering Mississippi State UniversityPO Box 9542Mississippi State39762USA Institute for Systems Engineering Research(ISER) Mississippi State University 3909 Halls Ferry RdVicksburgMS 39180 Department of Engineering management&Systems Engineering Old Dominion UniversityNorfolkVA 23529 eInstitute for Systems Engineering Research(ISER) U.S Army Engineer Research Development Center(ERDC)3909 Halls Ferry RdVicksburgMS 39180

Since its inception,Systems Engineering(SE)has developed as a distinctive discipline,and there has been significant progress in this field in the past two *** to other engineering disciplines,SE is not affirmed by a set of underlying fundamental propositions,instead it has emerged as a set of best practices to deal with intricacies stemming from the stochastic nature of engineering complex systems and addressing their *** the existing methodologies and paradigms(dominant patterns of thought and concepts)of SE are very diverse and somewhat *** appears to create some confusion regarding the design,deployment,operation,and application of *** purpose of this paper is 1)to delineate the development of SE from 1926-2017 based on insights derived from a histogram analysis,2)to discuss the different paradigms and school of thoughts related to SE,3)to derive a set of fundamental attributes of SE using advanced coding techniques and analysis,and 4)to present a newly developed instrument that could assess the performance of systems *** than Two hundred and fifty different sources have been reviewed in this research in order to demonstrate the development trajectory of the SE discipline based on the frequency of publication.

关键词： Systems Engineering(SE) history development systems engineering attributes performance measures

Effect of substrate miscut on the electron mobility in InSb(001) structures on Ge and Ge-on-insulator substrates

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Chinese Science Bulletin 2014年第4期59卷 369-373页

作者： m.C.Debnath T.D.mishima m.B.Santos K.hossain omer L. Dodge Department of Physics and Astronomy and Center for Semiconductor Physics in Nanostructures University of Oklahoma amethyst Research Inc.

InSb epilayers and InSb/Al0.20In0.80Sb quantum wells were grown on Ge(001)substrates and Ge-on-insulator(GeOI)-on-Si(001)substrates by molecular beam *** on both on-axis and 4°-off-axis substrate orientations was ***-phase domains were formed when InSb films were grown on on-axis substrates,but suppressed significantly by the use of 4°-off-axis *** off-axis substrates also reduced the densities of micro-twin defects and threading *** defect reduction resulted in an increase in the room-temperature electron mobility from 37,000 to 59,000 cm2/Vs in 4.0-lm-thick InSb epilayers and from 10,000 to20,000 cm2/Vs in 25-nm-thick InSb quantum wells on Ge(001)and GeOI-on-Si(001)substrates.

关键词：电子迁移率 InSb 基板绝缘体 Ge 硅(001) 薄膜生长结构