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Seismic performance and comparison of three different I beam to box column joints

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Earthquake Engineering and Engineering Vibration 2014年第4期13卷 717-729页

作者： Z.Saneei nia A.mazroi m.Ghassemieh H.Pezeshki School of Civil Engineering College of Engineering University of Tehran Department of Civil Engineering Central Branch of Azad University Building and Housing researching Center

Despite the inherently advantages of the box column, finding the best option for the I beam to the box column connection is the main challenge in using the box column as a structural member for special moment frames. In this paper, the seismic performance of urtreinforced connection, weakened connection and strengthened connection was evaluated through a com.rehensive experimental program. The seismic comparisons were fabricated by assessing the strength, ductility and energy dissipation in each configuration. Three full scale tests with several connections were carried out. All the specimens were subjected to cyclic loading and prior to failure by forming a plastic hinge in the beam, all the connections managed to reach an inelastic rotation of m.re than 6.0% rad. The experimental and analytical results showed that the seismic performance of the strengthened connection with flange and shear plates turned out to be the most effective in the beam to the box column connection. m.reover, the normalized stress distribution of the continuity plates revealed that the possibility of the weld fracture in unreinforced connection is m.re than other specimens.

关键词： box column special moment frame unreinforced connection weakened connection strengthened connection seismic comparison

Thermogravimetric Studies of Deposited Potash Im.regnated for Flame-retardancy into a Cotton Fabric

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Chinese Journal of Chemistry 2007年第7期25卷 926-929页

作者： mOSTASHArI, S.m. nia, Y.K. BALE, S. Department of Chemistry Faculty of Science the University of Gilan Rasht lran

The effect of potash as a nondurable finish on the flammability of 100% cotton fabric （plain 180 g/m^2） was investigated. The bone-drled weighed fabrics were dipped into suitable concentrations of potash, with a volume of 100 mL at 20-2℃. The im.regnation was followed by means of squeeze rolls and drying at 110 ℃. The samples were then reweighed with analytical precision. After conditioning overnight by using our ＂vertical flame tester＂ the optimum add-on values to impart flame-retardancy to cotton fabric was determined and expressed by 0.80 g of potash per 100 g fabric to be an efficient addition. Thermogravimetric analysis of pure cotton, treated cotton with potash at its optimum efficiency for donation of flame-retardancy into cotton fabric was fulfilled and the thermograms were compared and commented. The effectiveness of this hydroxide was attributed to the heat dissipation by the remaining consumed material during the combustion. The results obtained are in favor of ＂Dust or Wall Effect Theory＂.

关键词： condensed phase retardation dust or wall effect theory flame-retardancy gas theory potash thermogravimetry

Neurocircuit regeneration by extracellular matrix reprogramming

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Neural regeneration research 2025年第8期20卷 2300-2301页

作者： Shengzhang Su Ian N.Levasseur Kimberly m.Alonge Department of medicinal Chemistry University of WashingtonSeattleWAUSA Department of Chemistry University of WashingtonSeattleWAUSA Department of medicine University of Washington Medicine Diabetes InstituteSeattleWAUSA

The brain's extracellular matrix(ECm),which is com.rised of protein and glycosaminoglycan(GAG)scaffolds,constitutes 20%-40% of the human brain and is considered one of the largest influencers on brain cell functioning(Soles et al.,2023).Synthesized by neural and glial cells,the brain's ECm.regulates a m.riad of homeostatic cellular processes,including neuronal plasticity and firing(miyata et al.,2012),cation buffering(m.raws ki et al.,2015),and glia-neuron interactions(Anderson et al.,2016).Considering the diversity of functions,dynamic remodeling of the brain's ECm indicates that this understudied medium is an active participant in both normal physiology and neurological diseases.

关键词： matrix programming

Transient num.rical simulation of annealing process in a conjugate combined radiation conduction heat transfer

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Journal of Central South University 2020年第9期27卷 2662-2672页

作者： m.Foruzan nia S.A.Gandjalikhan NASSAB mechanical Engineering Department Shahid Bahonar University of KermanKerman ***Iran

The annealing time is an important affecting factor in the performance of many *** present work deals with the transient simulation of annealing process in a cubic furnace in which a solid element is placed in its *** the working gas can have some radiating features,a set of governing equations including the energy balance with the radiative transfer equation(rTE)for the gray radiating medium and the conduction equation inside the solid product are num.rically solved with progressing in *** results which are validated against both analytical and theoretical findings in the literature demonstrate that during the starting period,a high rate of radiant energy transfers into the solid body even at small optical *** behavior which hastens the rate of heat transfer at low values of the radiation conduction parameter,causes a fast annealing process in which the solid body warms up to its maximum ***,it is revealed that the rate of heat transfer is an increasing function of radiation-conduction parameter.

关键词： conjugate radiation conduction transient annealing process

Burrow m.rphology of Uca uruguayensis and Uca leptodactylus(Decapoda:Ocypodidae)from a subtropical mangrove forest in the western Atlantic

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Integrative Zoology 2013年第3期8卷 307-314页

作者： Glauco B.O.mACHADO João B.L.GUSmÃO-JUNIOr Tânia m.COSTA Campus Experimental do Litoral Paulista UNESPSão VicenteSão PauloBrazil

The continuous excavation of burrows by fiddler crabs generates bioturbation in the sediment,which can be estimated from burrow *** aim of the present study was to describe the burrow m.rphology of Uca uruguayensis and *** and its relationship with demography of resident individuals and to estimate the level of bioturbation in the sediment generated by each *** all individuals from each of the 2 species,sex was determined and the carapace width(CW;mm)*** were characterized according to burrow diameter(BD;mm),maximum burrow depth(mBD;mm)and burrow volume(BV;cm^(3)).The density of each species in the study area was also *** both species,the males were larger and occupied burrows with higher BV compared to *** between sexes in relation to the burrow characteristics might reflect sexual dim.rphism within the group and are probably related to the fact that males use the burrows for *** and BV showed significant positive relationships with the size of resident *** amount of sediment removed per burrow was estimated from mean BV:10.78 cm^(3)of sediment/burrow for *** and 12.38 cm^(3)of sediment/burrow for *** the density and depth differences between the 2 species,the similarity in burrow volume suggests that *** and *** present the same importance in terms of the bioturbation *** m.rphology is highly associated with characteristics of the occupant,although extrinsic factors should also be considered,and its description can provide estimates on the bioturbation generated by Uca species in mangrove forests.

关键词： bioturbation burrow structure crab burrowing fiddler crab

microstructure and phase formation of mullite-Pr6O11 composite prepared by spark plasma sintering

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Journal of rare Earths 2023年第2期41卷 283-289页

作者： Ehsan Ghasali Davoud Ghahremani Yasin Orooji Aida Faeghi-nia Asghar Kazem-zadeh Touradj Ebadzadeh College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua 321004China Ceramic Dept. Materials and Energy Research CenterAlborzIran Department of Engineering Maybod BranchIslamic Azad UniversityMaybodIran

The present work investigates the effect of high praseodymium oxide(Pr6O11)content on the microstructure and phase formation of mullite(3Al_(2)O_(3)·2SiO_(2))precursor by means of the spark plasma sintering process.30 wt%Pr6O11was added to a mullite precursor consisting of aluminum nitrate nonahydrate and tetraethyl orthosilicate through a high energy mixer mill in ethanol *** spark plasma sintering was performed at a te mperature of 1200℃under 23 Pa vacuum co nditions by applying initial and final pressure of 10 and 30 mPa,*** analysis confirms the existence of mullite,alumina,Pr6O11,Pr2O3and quartz as the only crystalline *** images reveal an interesting deposition of hexagonal-shaped Al_(2)O_(3)particles on polished surfaces and complex oxide phases of the fiber network adhering to alumina particles in the form of tails seen on the fracture ***,the bending strength of 213±21 mPa,Vickers hardness of 9.3±0.1 mPa and fracture toughness of6.21±0.12 mPa·m1/2are obtained for the prepared composite.

关键词： mullite Pr6O11 Composite Spark plasma sintering rare earths

Exfoliation and Engineering of 2D materials Through Electrochemistry

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CCS Chemistry 2024年第10期6卷 2368-2391页

作者： Sheng Yang Panpan Zhang Ali Shaygan nia Xinliang Feng Frontiers Science Center for Transformative molecules School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 201203 State Key Laboratory of material Processing and Die&mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074 Center for Advancing Electronics Dresden(cfaed) Faculty of Chemistry and Food ChemistryTechnische Universität DresdenDresden 01069 max Planck Institute for microstructure Physics Halle(Saale)06120

Two-dimensional(2D)materials offer countless possibilities for next-generation(opto)electronic devices because of their diverse and tailorable physicochemical *** bridge the gap between fundamental science and practical applications,simple-to-use universal approaches are essential for the mass production of 2D materials with specific target *** intercalation/exfoliation stands out from many up-scalable synthetic strategies,thanks to its great time efficiency,mild working conditions,and simple *** the use for direct exfoliation of 2D materials,device-level controllable intercalation of guest species often results in rich phase diagrams with competing orders and ground states in 2D systems,giving rise to new exotic quantum ***,making use of electrochemistry in ion intercalation and host–guest interaction is crucial to expand the library,as well as the function of 2D ***,we present a focused review of the exciting advances of electrochemical exfoliation and engineering of 2D materials,including intercalation strategies,intercalation chemistry,exfoliation mechanisms,material properties,and potential *** outlook on the major challenges and perspectives is also presented at the end of the discussion.

关键词： intercalation exfoliation 2D materials electrochemistry

Effects of N-acetylcysteine on growth,viability and reactive oxygen species levels in small antral follicles cultured in vitro

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Asian pacific Journal of reproduction 2023年第1期12卷 42-48页

作者： Efigênia B.Cordeiro Bianca r.Silva Laís r.F.m.Paulino Pedro A.A.Barroso Laryssa G.Barrozo miguel F.de Lima Neto Josér.V.Silva Laboratory of Biotechnology and Physiology of reproduction Federal University of CearaAv.Comandante Maurocélio Rocha Ponte 10062041-040SobralCEBrazil

Objective:To investigate the effects of different concentrations of N-acetylcysteine on follicular growth and m.rphology,as well as on viability,levels of reactive oxygen species(rOS)and meiotic progression of oocytes from in vitro cultured bovine early antral ***:Isolated early antral follicles(about 500μm)were cultured in TCm-199+alone or supplemented with 1.0,5.0 or 25.0 mm N-acetylcysteine at 38.5℃with 5%CO_(2) for 8 *** diameters were evaluated at day 0,4 and 8 of *** the end of culture,the levels of rOS,chromatin configuration and viability(calcein-Am and ethidium homodim.r-1 staining)were investigated in the cumulus-oocyte *** of follicle diameters between treatments were *** on percentages of m.rphologically normal follicles,growth rates and chromatin configuration in different treatments were ***:An increase in follicular diameters after culture in all treatments was observed,except for follicles cultured with 25.0 mm *** microscopy showed that oocytes cultured in all treatments were stained positively with calcein Am,and that 5.0 mm N-acetylcysteine reduced fluorescence for ethidium *** levels of rOS in oocytes from follicles cultured with 1.0 mm N-acetylcysteine showed a significant reduction compared to other *** presence of N-acetylcysteine in culture medium did not influence the rates of oocyte at the germinal vesicle ***:N-acetylcysteine at concentrations of 1.0 and 5.0 mm.reduces rOS levels and staining for ethidium homodim.r-1 in in vitro cultured follicles,respectively,while 25.0 mm N-acetylcysteine decreases follicular growth and the percentages of continuously growing follicles.

关键词： Antioxidant N-acetylcysteine Antral follicles Bovine reactive oxygen species

Professional One-Day Training Course in BIm: A Practice Overview of multi-Applicability in Construction

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Journal of Software Engineering and Applications 2022年第5期15卷 131-149页

作者： Alcínia Zita Sampaio Augusto m. Gomes Department of Civil Engineering University of Lisbon Lisbon Portugal

The implementation of Building Information modelling (BIm) methodology in the construction industry has been covering wide applicability with recognized benefits in designing, constructing and operating buildings. A recent short course organized in the University of Lisbon, actualized with the most relevant achievement based in master research, was offered to professionals of the industry, namely, architects and civil engineers coming from diverse engineering areas, environment, construction, maintenance, consult and patrimonial enterprises and also from public organizations like city councils. The proposed action covers the areas of construction (conflict analysis, planning and materials take-off), structures (interoperability, analyses and transfer of information between software) and the most recent Heritage Building Information modelling (HBIm) topic. The course aims to contribute to the dissemination of the potential of BIm in the areas of designing, construction and refurbishing of historical buildings. The participants followed the course with great interest and satisfaction, formulating several questions directed to the particular activity of each of the attendees.

关键词： BIm Training Course Up-to-Date Information Im.rove Professional Skills