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An Investigation on New Nonbuckling Composite Structures

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An Investigation on New Nonbuckling Composite Structures

Solar and wind energy potential assessment for Razavi Khorasan Province in Iran

第十三届国际复合材料会议

作者： h.hosseini-toudeshky M.Sadeghi Aerospace Eng. Dept. Amir-Kabir University of Technology Tehran Iran h.F.Dorna Aerospace Co

＜正＞Since wing ribs and fuselage frames compose a considerable parts of the aircraft weight, it is important to make them as safety permits and be efficient relative to the cost of fabrication and assembly. In the composite flight vehicle structures, wing ribs, spar webs and fuselage frames subjected to compressive loads are usually made by sandwiched structures, e.g. Aluminum or Nomex honeycomb and P.V.C foam core. In this paper, new techniques based on the techniques already used for metallic components are studied. Three types of shear resistant, nonbuckling webs are frequently used in the metallic web design namely: a) Web with formed vertical

关键词： nonbuckllng composite structure web with beads finite element analyses

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Journal of Central South University 2024年第6期31卷 2027-2038页

作者： hosseini Amirpouya RAMEZANI Faeze MIRhosseini Mojtaba School of Advanced Technologies Iran University of Science and TechnologyTehranIran

This study aims to evaluate the solar and wind energy potential across Razavi Khorasan Province,Iran,with a specific focus on the Khaf region.A preliminary assessment of mean solar radiation,mean wind speeds,and Weibull distribution parameters was conducted for different towns and zones within the *** findings showed that Khaf has favorable characteristics for further *** solar and wind energy metrics examined include global horizontal irradiance,clearness index,wind rose patterns,and turbulence *** a height of 40 m,Khaf’s wind power density reached 1650 W/m^(2),indicating exceptional wind energy generation ***,Khaf received an average annual solar radiation of 2046 kW·h/m^(2),representing significant solar energy *** these substantial renewable resources in Khaf could allow Razavi Khorasan Province to reduce reliance on fossil fuels,improve energy sustainability,and mitigate climate change *** research contributes an in-depth assessment of Razavi Khorasan's solar and wind energy potential,particularly for the promising Khaf *** work may examine optimal sites for renewable energy projects and grid integration strategies to leverage these resources.

关键词： solar energy wind energy Razavi Khorasan radiation Weibull distribution

Limb Lengthening and Reconstruction Society orthopedic surgeons in the United States:An analysis of geographical distribution,academic,leadership,and demographic characteristics

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World Journal of Orthopedics 2024年第2期15卷 147-155页

作者： Amir human hoveidaei Reza Niakan Seyed hossein hosseini-Asl Abijith Annasamudram Janet D Conway International Center for Limb Lengthening Rubin Institute for Advanced OrthopedicsSinai Hospital of BaltimoreBaltimoreMD 21215United States Student Research Committee Shiraz University of Medical SciencesShiraz 73Iran Students’Scientific Research Center Tehran University of Medical SciencesTehran ***Iran

BACKGROUND The Limb Lengthening and Reconstruction Society(LLRS)is a premier orthopedic specialty organization that promotes limb reconstruction for all *** membership characteristics,however,are poorly *** study delineates orthopedic surgeon LLRS members’demographic traits,academic achievement,leadership attainment,and geographical distribution across the United *** To inform aspiring orthopedic professionals,as well as to promote growth and diversity in both the LLRS organization and overarching *** This cross-sectional study examined United States LLRS members’academic,leadership,demographic,and geographical *** reviewing the 2023 LLRS member directory,Google search results were matched to the listings and appended to the compiled *** and ethnicity were evaluated visually utilizing retrieved *** hirsch index(h-index)of academic activity,residency and fellowship training,other graduate degrees,leadership positions,practice type(academic or non-academic),and spoken languages were *** members per state and capita determined geographic *** Mann Whitney U test was applied to compare h-index between males and females,as well as to assess member differences pertaining to affiliation with academic vs non-academic practice *** The study included 101 orthopedic surgeons,78(77.23%)Caucasian and 23(22.77%)non-Caucasian,79(78.22%)male and 22(21.78%)*** with DO degrees comprised only 3.96%(4)of the cohort,while the vast majority held MDs[96.04%(97)].Mean h-index was 10.55,with male surgeons having a significantly higher score(P=0.002).Most orthopedic surgeons(88.12%,)practiced in academic *** those professionals who occupied leadership positions,14%were women,while 86%were ***,19(37.25%)United States regions and the District of Columbia lacked an LLRS-member orthopedic *** per capita rate across the United States was 0.30 LLRS orthopedic

关键词： Limb lengthening and reconstruction Orthopedic surgeon demographics Orthopedic surgeon societal membership Orthopedic fellowships

Etiology of Pancytopenia in Tabriz Shahid Ghazi hospital:A Cross-sectional Study in Iran

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Proceedings of Anticancer Research 2024年第4期8卷 104-115页

作者： hossein Azari Bostanabad Safa Mousavi Mohammad hossein hosseini Sadra Sarandili Ali Esfahani Babak Nejati Department of hematology and Oncology Faculty of MedicineTabriz University of Medical SciencesTabrizIran Liqvan health Center Tabriz University of Medical SciencesTabrizIran hematology and Oncology Research Center Tabriz University of Medical SciencesTabrizIran Department of health Sciences Curtin Medical SchoolCurtin UniversityPerthWAAustralia

Objective:Pancytopenia is characterized by a reduction in all three types of blood cells:erythrocytes,leukocytes,and *** is caused by a wide range of diseases,leading to diagnostic *** causes can range from drug reactions to life-threatening diseases such as aplastic anemia and *** study aims to investigate the causes of pancytopenia,specifically focusing on age and gender differences among ***:This cross-sectional study includes patients of all ages diagnosed with pancytopenia,as indicated by a CBC/h1 showing a WBC count less than 4,000/μL,platelet count less than 150,000/μL,and hemoglobin levels below 12 g/dL in women and less than 13 g/dL in *** study only included patients with pancytopenia who underwent bone marrow examination and were not subjected to chemotherapy or radiation ***:A total of 133 patients with pancytopenia were included in the *** average age was 47.35±17.62 years old,with 66%of the participants being male and 34%being *** leukemia,specifically acute myeloid leukemia(AML)and acute lymphoid leukemia(ALL),was identified as the primary cause of pancytopenia,accounting for 31.5%of *** anemia was the second most common cause,accounting for 30%of cases,followed by aplastic anemia at 7.5%.Conclusion:Pancytopenia,a condition marked by the decrease in both erythrocytes and leukocytes as well as thrombocytes,can arise from a myriad of *** main findings of this study revealed that megaloblastic anemia,acute myeloid leukemia(AML),and acute lymphoid leukemia(ALL)were the most common ***,a considerable proportion of cases of pancytopenia can be attributed to acute ***,expeditious and accurate diagnosis is imperative and has the potential to save lives in such cases.

关键词： Pancytopenia Leukemia Anemia Bone marrow Blood cells

Effect of Gaussian size distribution width on minimum fluidization velocity in tapered gas–solid fluidized beds

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Particuology 2022年第7期20卷 71-84页

作者： Mojtaba Rasteh Goodarz Ahmadi S.h.hosseini Department of Chemical Engineering Hamedan University of TechnologyHamedanP.O.Box 65155-579Iran Department of Mechanical and Aeronautical Engineering Clarkson UniversityPotsdamNY 13699-5725USA Department of Chemical Engineering Ilam UniversityIlam 69315-516Iran

This paper investigated the effect of Gaussian distribution width,average particle diameter,particle loading,and the tapered angle on minimum fluidization velocity(U_(mf))by conducting extensive experiments in tapered fluidized *** powders with Gaussian size distribution and different distribution widths were used in the *** increase in U_(mf)with increasing the average particle diameter,particle loading,and the tapered angle was *** was also a nonmonotonic behavior of Umf as the Gaussian distribution width *** empirical correlation including dimensionless groups for predicting Umf in tapered beds was developed in which the effect of distribution width was *** proposed correlation predictions were in good agreement with the experimental data,with a maximum deviation of 16.5%and average and standard deviations of,respectively,6.4%and 7.4%.The proposed correlation was also compared with three earlier models,and their accuracy was discussed.

关键词： Tapered fluidized bed Minimum fluidization velocity Gaussian size distribution Distribution width Dimensional analysis

Mandelic Acid Single-Crystal Growth:Experiments vs Numerical Simulations

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Communications in Computational Physics 2023年第1期33卷 77-100页

作者： Q.Tan S.A.hosseini A.Seidel-Morgenstern D.Thevenin h.Lorenz Laboratory of Fluid Dynamics and Technical Flows University ofMagdeburg“Otto von Guericke”D-39106MagdeburgGermany Department of Mechanical and Process Engineering ETH Zurich8092 ZurichSwitzerland Max Planck Institute for Dynamics of Complex Technical Systems(MPI DCTS) 39106MagdeburgGermany

Mandelic acid is an enantiomer of interest in many areas,in particular for the pharmaceutical *** of the approaches to produce enantiopure mandelic acid is through crystallization from an aqueous *** propose in this study a numerical tool based on lattice Boltzmann simulations to model crystallization dynamics of(S)-mandelic *** solver is first validated against experimental *** is then used to perform parametric studies concerning the effects of important parameters such as supersaturation and seed size on the growth *** is finally extended to investigate the impact of forced convection on the crystal *** on there parametric studies,a modification of the reactor geometry is proposed that should reduce the observed deviations from symmetrical growth with a five-fold habit.

关键词： Mandelic acid phase-field model lattice Boltzmann method ventilation effect

Controlled temperature-mediated curcumin release from magneto-thermal nanocarriers to kill bone tumors

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Bioactive Materials 2022年第5期7卷 107-117页

作者： A.Khodaei F.Jahanmard h.R.Madaah.hosseini R.Bagheri A.Dabbagh h.Weinans Amin Yavari Institute for nanoscience and nanotechnology sharif university of technologytehraniran department of orthopedics university medical center utrechtutrechtthe netherlands department of materials science and engineering sharif university of technologytehraniran school of medicine faculty of health and medical sciencestaylor’s universitysubang jayamalaysia regenerative medicine utrecht utrecht universityutrechtthe netherlands

Systemic chemotherapy has lost its position to treat cancer over the past years mainly due to drug resistance,side effects,and limited survival *** a plethora of local drug delivery systems to solve this issue,the combinatorial strategy of chemo-hyperthermia has recently received *** we developed a magneto-thermal nanocarrier consisted of superparamagnetic iron oxide nanoparticles(SPIONs)coated by a blend formulation of a three-block copolymer Pluronic F127 and F68 on the oleic acid(OA)in which Curcumin as a natural and chemical anti-cancer agent was *** subsequent nanocarrier SPION@OA-F127/F68-Cur was designed with a controlled gelation temperature of the shell,which could consequently control the release of *** release was systematically studied as a function of temperature and ph,via response surface methodology(RSM).The bone tumor killing efficacy of the released curcumin from the carrier in combination with the hyperthermia was studied on MG-63 osteosarcoma cells through Alamar blue assay,live-dead staining and apoptosis caspase 3/7 activation *** was found that the shrinkage of the F127/F68 layer stimulated by elevated temperature in an alternative magnetic field caused the curcumin *** the maximum release concentration and cell death took place at 45℃,treatment at 41℃ was chosen as the optimum condition due to considerable cell apoptosis and lower side effects of mild *** cell metabolic activity results confirmed the synergistic effects of curcumin and hyperthermia in killing MG-63 osteosarcoma cells.

关键词： Osteosarcoma Magnetic hyperthermia Curcumin MRI contrast agent

Effect of temperature on pull-in voltage and nonlinear vibration behavior of nanoplate-based NEMS under hydrostatic and electrostatic actuations

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Acta Mechanica Solida Sinica 2017年第2期30卷 174-189页

作者： Farzad Ebrahimi S.h.S.hosseini Department of Mechanical Engineering Faculty of Engineering Imam Khomeini International University qazvinIran

This paper deals with the study of the temperature effect on the nonlinear vibration behavior of nanoplate-based nano electromechanical systems（NEMS） subjected to hydrostatic and electrostatic actuations. Using Eringen＇s nonlocal elasticity and Gurtin–Murdoch theory, the nonlocal plate model is derived through hamilton＇s principle. The governing equation which is extremely nonlinear due to the geometrical nonlinearity and electrostatic attraction forces is solved numerically using the differential quadrature method（DQM）. The accuracy of the present method is veriied by comparing the obtained results with the experimental data and those in the literature and very good agreement is obtained. Finally a comprehensive study is carried out to determine the inluence of temperature on the nonlinear vibration characteristics of NEMS made of two different materials including aluminum（Al）and silicon（Si） and some conclusions are drawn.

关键词： Small scale effect Nano electromechanical system Nonlinear vibration Temperature effect Pull-in voltage

Entropic Multi-Relaxation-Time Lattice Boltzmann Model for Large Density Ratio Two-Phase Flows

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Communications in Computational Physics 2023年第1期33卷 39-56页

作者： S.A.hosseini B.Dorschner I.V.Karlin Department of Mechanical and Process Engineering ETH Zurich8092 ZurichSwitzerland

We propose a multiple relaxation time entropic realization of a recent twophase flow lattice Boltzmann model[***,***,and ***,Journal of Fluid Mechanics 953(2022)].While the original model with a single relaxation time allows us to reach large density ratios,it is limited in terms of stability with respect to non-dimensional viscosity and *** showthat the entropic multiple relaxation time model extends the stability limits of the model significantly,which allows us to reach larger Reynolds numbers for a given grid *** thermodynamic properties of the solver,using the Peng-Robinson equation of state,are studied first using simple ***-existence densities and temperature scaling of both the interface thickness and the surface tension are shown to agree well with *** model is then used to simulate the impact of a drop onto a thin liquid film with density and viscosity ratios matching those of water and air both in two and three *** results are in very good agreement with theoretically predicted scaling laws and experimental data.

关键词： Lattice Boltzmann method two-phase flows entropic multiple relaxation time