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Toward equation structural modeling:an integration of interpretive structural modeling and structural equation modeling

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Journal of Management Analytics 2021年第4期8卷 693-714页

作者： alireza amini Moslem Alimohammadlou Department of Management Shiraz UniversityShirazIran

Interpretive structural modeling(ISM)is an interactive process in which a malformed(bad structured)problem is structured into a comprehensive systematic ***,despite many advantages that ISM provides,this method has some shortcomings,the most important one of which is its reliance on participants’intuition and *** problem undermines the validity of *** solve this problem and further enhance the ISM method,the present study proposes a method called equation structural modeling(ESM),which draws on the capacities of structural equation modeling(SEM).As such,ESM provides a statistically verifiable framework and provides a graphical,hierarchical and intuitive model.

关键词： decision analysis interpretive structural modeling structural equation modeling combined model

Physical modeling into outflow hydrographs and breach characteristics of homogeneous earthfill dams failure due to overtopping

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Journal of Mountain Science 2021年第2期18卷 462-481页

作者： KOUZEHGAR Kamran HASSANZADEH Yousef ESLAMIAN Saeid YOUSEFZADEH FARD Mikaeil BABAEIAN amini alireza Department of Civil Engineering Najafabad BranchIslamic Azad UniversityNajafabad ***Iran Department of Water Engineering Center of Excellence in HydroinformaticsFaculty of Civil EngineeringUniversity of TabrizTabriz ***Iran Department of Water Engineering Isfahan University of TechnologyIsfahan ***Iran Faculty of Civil Engineering University of TabrizTabriz ***Iran Faculty of Civil Engineering University of BonabBonab ***Iran

The main objective of the present study is to introduce new empirical equations for the determination of breach geometrical dimensions and peak outflow discharge(Q_(p)).Therefore,a historic failure database of 109 embankments was collected and *** most important factors that affect the breach evolution,including grading size,hydraulic,and outflow characteristics are also *** of the parameters used for the determination of Q_(p) and average breach width(Bave)have a significant effect on the erosion process,but they are less reflected in the technical *** study the behavior of noncohesive soils during overtopping,15 physical tests were performed at the laboratory,and the effects of interfering parameters were *** experimental output hydrograph was used to simulate the hydrographs resulting from the failure of real dams,and recent artificial intelligence techniques along with linear and nonlinear regression models were *** area-time analysis of the laboratory hydrographs shows that the soil particle size and the characteristics of reservoir-basin significantly affect the rate of breach formation and outflow *** relationships are introduced,based on the breach characteristics,by a combination of historical and experimental data,as well as case studies conducted on the hypothetical failure of 10 operational *** mathematical model is also used to simulate the process of breach *** on statistical indices,comparison of the results,and sensitivity analysis,the developed equations can better express the susceptibility of materials to erosion and their application can minimize downstream vulnerabilities.

关键词： Dam breach Peak outflow Output hydrograph Modeling Soft computing Experimental setup

Effect of Deep Cryogenic Heat Treatment on the Wear Behavior of Carburized DIN 1.7131 Grade Steel

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Acta Metallurgica Sinica(English Letters) 2015年第3期28卷 348-353页

作者： Kamran amini alireza Araghi Amin Akhbarizadeh Department of Materials Science Majlesi BranchIslamic Azad University Department of Materials Science and Engineering Shiraz BranchIslamic Azad University

The effects of the deep cryogenic heat treatment on the microstructural changes,wear resistance,and hardness of carburized DIN 1.7131 grade steel were *** show that cryogenic heat treatment reduced the retained austenite and increased the carbide *** addition,after the cryogenic heat treatment,carbide shows a more uniform distribution,as compared to the conventionally treated *** was also clarified that the hardness of the cryogenically treated samples was improved,but the relative improvement decreases with the distance as the surface *** has been shown that the wear resistance improves due to the cryogenic heat treatment,and the predominant wear mechanism is a combination of the adhesive and tribo-chemical wear.

关键词： DIN 1.7131 grade steel Carburized steel Hardness Deep cryogenic heat treatment Tribo-chemical wear

Surface treatment of titanium dental implant with H2O2 solution

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International Journal of Minerals,Metallurgy and Materials 2020年第9期27卷 1281-1286页

作者： Mohammad Khodaei Kamran amini alireza Valanezhad Ikuya Watanabe Department of Materials Science and Engineering Golpayegan University of TechnologyGolpayegan ***Iran Center for Advanced Engineering Research Majlesi BranchIslamic Azad UniversityIsfahan 196151194Iran Department of Dental and Biomedical Materials Science Graduate School of Biomedical SciencesNagasaki University1-7-1 SakamotoNagasaki 852-8588Japan

The surface treatment is important for titanium and its alloys as promising candidates for dental implantation due to their bioinert *** surface samples were modified using H2O2 solution at different times up to 72 h to boost their *** to the results of the field emission scanning electron microscopy test,some nanostructures are formed on the surface of treated titanium samples and increased in size by increasing the time of treatment up to 24 *** 24 h of application,the sharpness of nanostructures decreased and the micro-cracks and discontinuity in the coating surface *** results of the X-ray diffraction study and Raman spectroscopy revealed that anatase(TiO2)was formed on the surface of treated titanium *** peak intensity of Raman spectroscopy increased with an improvement in treatment time of up to 24 h and then decreased due to the discontinuity of the *** wettability and ability to form apatite were reached at 6 h of *** is clear that the treatment time has a significant effect on the surface treatment of titanium using the H2O2 solution.

关键词： titanium implant surface treatment hydrogen peroxide anatase dental implant

Fabrication and Characterization of Poly Lactic Acid Scaffolds by Fused Deposition Modeling for Bone Tissue Engineering

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Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 248-251页

作者： Mohammad Khodaei Kamran amini alireza Valanezhad Department of Materials Science and Engineering Golpayegan University of TechnologyGolpayeganIran Department of Materials Engineering Tiran BranchIslamic Azad UniversityIsfahanIran Center for Advanced Engineering Research Majlesi BranchIslamic Azad UniversityIsfahanIran Department of Dental and Biomedical Materials Science Nagasaki UniversityNagasakiJapan

Three-dimensional porous poly-lactic acid(PLA) scaffold was fabricated using fused deposition modeling(FDM) method including 30%, 50% and 70% nominal porosity. Study of phases in initial polymeric material and printed scaffolds was done by X-ray diffraction(XRD), and no significant phase difference was observed due to the manufacturing process, and the poly-lactic acid retains its crystalline properties. The results of the mechanical properties evaluation by the compression test show that the mechanical properties of the scaffold have decreased significantly with increasing the porosity of scaffold. The microstructure of scaffolds were studied by scanning electron microscope(SEM), showing that the pores had a regular arrangement and their morphology changed with porosity change. The mechanical properties of the poly-lactic acid scaffolds printed using fused deposition modeling, can be adapted to the surrounding tissue, by porosity change.

关键词： 3D porous scaffold fused deposition modeling poly-lactic acid biodegradable polymer

Comparative Study on Characteristics and Cytotoxicity of Bifunctional Magnetic-Silver Nanostructures: Synthesized Using Three Different Reducing Agents

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Acta Metallurgica Sinica(English Letters) 2016年第4期29卷 326-334页

作者： Narjes Ebrahimi Sara Rasoul-amini alireza Ebrahiminezhad Younes Ghasemi Ahmad Gholami Hassan Seradj Department of Pharmaceutical Biotechnology School of Pharmacy Shiraz University of Medical Sciences Department of Medicinal Chemistry School of PharmacyShiraz University of Medical Sciences Shiraz Fars Iran Pharmaceutical Sciences Research Center Shiraz University of Medical Sciences Department of Medical Biotechnology School of MedicineFasa University of Medical Sciences Department of Pharmacognosy School of Pharmacy Shiraz University of Medical Sciences

Magnetic-silver nanostructures were synthesized via optimized chemical conditions, and their characteristics and cytotoxicity were compared as candidates for the magnetic delivery of silver nanoparticles toward cancer cells. Magnetic-silver nanostructures were prepared through the reduction of silver ions in the presence of iron oxide nanoparticles using three different reducing agents （glucose, maltose and sodium citrate）. Their physicochemical characteristics were determined using ultraviolet-visible spectroscopy, X-ray diffraction analysis, transmission electron microscopy, selected area electron diffraction analysis, Fourier transformed infrared spectroscopy, atomic absorption spectroscopy, vibrating sample magnetometry and differential scanning calorimetry. Cytotoxic activities were evaluated against a human liver hepatocellular carcinoma cell line. Fabricated nanostructures, which exhibit differences in size, silver content, magnetic saturation value and cytotoxicity, represent sufficient superparamagnetic properties and considerable cytotoxicity to be suggested as effective tools in magnetic targeting of silver nanoparticles as an approach to cancer therapy.

关键词： Bifunctional nanostructure Magnetic-silver nanostructure Silver nanoparticle Cytotoxicity Reducing agent

Promising Effects of Zerumbone on the Regulation of Tumor-promoting Cytokines Induced by TNF-α-activated Fibroblasts

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Current Medical Science 2020年第6期40卷 1075-1084页

作者： Zahra Radaei alireza Zamani Rezvan Najafi Massoud Saidijam Farid Azizi Jalilian Razieh Ezati Ghasem Solgi Razieh amini Department of Immunology School of MedicineRamadan University of Medical SciencesHamadan 65178Iran Research Center for Molecular Medicine Hamadan University of Medical SciencesHamadan 65178Iran Department of Microbiology School of MedicineHamadan University of Medical SciencesHamadan 65178Iran Institute of Medical Biotechnology National Institute of Genetic Engineering and BiotechnologyTehran 14965Iran

Inflammation plays an important role in the development of several *** cytokines,including tumor necrosis factor-α(TNF-α),are associated with the induction of *** inflammation contributes to the progression of cancer through several mechanisms,including increased cytokine production and activation of transcription factors,such as nuclear factor-κB(NF-κB).Zerumbone(ZER),a component of subtropical ginger(Zingiber zerumbet Smith),seems to have anti-inflammatory,anti-cancer,and antioxidant *** this study,we aimed to explore the protective function and mechanisms of ZER against TNF-α-induced cancer-promoting *** found that the viability of stimulated human fibroblast cell lines was reduced after treatment with ZER(IC50=18µmol/L),compared to un-stimulated fibroblasts(IC50=40µmol/L).Besides,ZER inhibited mRNA expression and protein secretion of transforming growth factor-β(TGF-β),interleukin-33(IL-33),monocyte chemoattractant protein-1(MCP-1),and stromal cell-derived factor 1(SDF-1),which were produced by TNF-α-induced fibroblasts,as measured by quantitative real time-PCR(qRT-PCR)and ELISA *** mRNA expression levels of TGF-β,IL-33,SDF-1,and MCP-1 showed 8,5,2.5,and 4-fold reductions,***,secretion of TGF-β,IL-33,SDF-1,and MCP-1 was reduced to 3.65±0.34 ng/mL,6.3±0.26,1703.6±295.2,and 5.02±0.18 pg/mL,respectively,compared to the untreated *** addition,the conditioned media(CM)of TNF-α-stimulated fibroblasts increased the NF-κB expression in colorectal cancer cell lines(HCT-116 and Sw48),while in the vicinity of ZER,the expression of NF-κB was *** the significant effects of ZER,this component can be used as an appropriate alternative herbal treatment for cancer-related chronic inflammation.

关键词： inflammation zerumbone activated fibroblasts tumor necrosis factor-α(TNF-α) nuclear factor-κB(NF-κB)

A new approach for correlating of H_(2)S solubility in[emim][Lac],[bmim][ac]and[emim][pro]ionic liquids using two-parts combined models

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Chinese Journal of Chemical Engineering 2022年第4期35卷 521-527页

作者： alireza Afsharpour Faculty of Chemical and Materials Engineering Shahrood University of TechnologyShahroodIran

Two bi-part combined models containing reaction equilibrium thermodynamic model and an equation of state(EoS)including cubic plus association(CPA)or modified Soave-Redlich-Kwong(SRK),were employed to correlate H_(2)S solubility in ionic liquids[emim][Lac],[bmim][Ac]and[emim][Pro].RETM and CPA/mSRK are responsible for chemical and phase equilibria calculations,*** RETM defines a complex formation reaction between an H_(2)S and two IL molecules into the liquid phase so that a complex in the form of H_(2)S(IL)_(2)is probable to *** the other side,CPA/mSRK EoSs perform phase equilibria computations to find pressure and vapor phase *** the case of CPA,both of H_(2)S and the ionic liquids were considered as self-associating components which pursue 4 C and 2 B schemes,*** model computes the pure IL parameters using experimental density *** this work,critical properties were estimated through the modified Lydersen-Joback-Reid method,Eotvos and Guggenheim ***,the binary systems were investigated by applying *** presents average absolute deviations(AADs)equal to 2.41%,13.42%and 3.52%for[emim][Lac],[bmim][Ac],and[emim][Pro],***,the AADs obtained by mSRK are 3.75%,5.07%,and 6.06%,*** it is evident from the results,the combination of RETM with both CPA and m SRK EoSs will result in good correlation accuracy.

关键词： Solubility Thermodynamics Ionic liquids CPA RETM mSRK

Microorganism-derived biological macromolecules for tissue engineering

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Frontiers of Medicine 2022年第3期16卷 358-377页

作者： Naser amini Peiman Brouki Milan Vahid Hosseinpour Sarmadi Bahareh Derakhshanmehr Ahmad Hivechi Fateme Khodaei Masoud Hamidi Sara Ashraf Ghazaleh Larijani alireza Rezapour Cellular and Molecular Research Center Iran University of Medical SciencesTehran ***Iran Institutes of Regenerative Medicine Faculty of Advanced Technologies in MedicineIran University of Medical SciencesTehran ***Iran Department of Tissue Engineering and Regenerative Medicine Faculty of Advanced Technologies in MedicineIran University of Medical SciencesTehran ***Iran Department of Pharmaceutics University of MinnesotaMN 55455USA Burn Research Center Department of Plastic and Reconstructive SurgeryIran University of Medical SciencesTehran ***Iran Department of Medical Biotechnology Faculty of ParamedicineGuilan University of Medical SciencesRasht ***Iran Department of Biology Science and Research BranchIslamic Azad UniversityTehran ***Iran Cellular and Molecular Research Centre Qom University of Medical SciencesQom ***Iran Department of Tissue Engineering and Regenerative Medicine School of MedicineQom University of Medical SciencesQom ***Iran

According to literature,certain microorganism productions mediate biological ***,their beneficial characteristics remain ***,scientists concentrate on obtaining natural materials from live creatures as new sources to produce innovative smart biomaterials for increasing tissue reconstruction in tissue engineering and regenerative *** present review aims to introduce microorganism-derived biological macromolecules,such as pullulan,alginate,dextran,curdlan,and hyaluronic acid,and their available sources for tissue *** evidence indicates that these materials can be used as biological material in scaffolds to enhance regeneration in damaged tissues and contribute to cosmetic and dermatological *** natural-based materials are attractive in pharmaceutical,regenerative medicine,and biomedical *** study provides a detailed overview of natural-based biomaterials,their chemical and physical properties,and new directions for future research and therapeutic applications.

关键词： biological macromolecules regenerative medicine tissue engineering exopolysaccharide carbohydrate