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Numerical investigation of the effects of soil-structure and granular material-structure interaction on the seismic response of a flat-bottom reinforced concrete silo

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 609-623页

作者： sonia Benkhellat Mohammed Kadri Abdelghani Seghir Laboratory of Solid Mechanics and Systems University of M’Hamed BougaraBoumerdes 35000Algeria Laboratory of Geomaterials Environment and DevelopmentUniversity of M’Hamed BougaraBoumerdes 35000Algeria Research Laboratory of Applied Hydraulics and Environment Faculty of TechnologyUniversity of BejaiaBejaia 06000Algeria

In this work,a numerical study of the effects of soil-structure interaction(SSI)and granular material-structure interaction(GSI)on the nonlinear response and seismic capacity of flat-bottomed storage silos is conducted.A series of incremental dynamic analyses(IDA)are performed on a case of large reinforced concrete silo using 10 seismic *** IDA results are given by two average IDA capacity curves,which are represented,as well as the seismic capacity of the studied structure,with and without a consideration of the SSI while accounting for the effect of *** curves are used to quantify and evaluate the damage of the studied silo by utilizing two damage indices,one based on dissipated energy and the other on displacement and dissipated *** cumulative energy dissipation curves obtained by the average IDA capacity curves with and without SSI are presented as a function of the base shear,and these curves allow one to obtain the two critical points and the different limit states of the *** is observed that the SSI and GSI significantly influence the seismic response and capacity of the studied structure,particularly at higher levels of ***,the effect of the SSI reduces the damage index of the studied structure by 4%.

关键词： reinforced concrete silo perfectly matched layers soil-structure interaction granular material-structure interaction effective seismic input method damage index

Dependence of Upper Atmosphere Photochemistry on the Shape of the Diurnal Cycle of the Photolysis Rates

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Advances in Atmospheric Sciences 2006年第2期23卷 207-214页

作者： sonia MONTECINOS Patricia BARRIENTOS Center of Advanced Studies in Arid Zones (CEAZA) University of La Serena La SerenaChile Department of Physics University of La Frontera TemucoChile

A photochemical model of the atmosphere constitutes a non-linear, non-autonomous dynamical system, enforced by the Earth＇s rotation. Some studies have shown that the region of the mesopause tends towards non-linear responses such as period-doubling cascades and chaos. In these studies, simple approximations for the diurnal variations of the photolysis rates are assumed. The goal of this article is to investigate what happens if the more realistic, calculated photolysis rates are introduced. It is found that, if the usual approximations-sinusoidal and step fiunctions—are assumed, the responses of the system axe similar： it converges to a 2-day periodic solution. If the more realistic, calculated diurnal cycle is introduced, a new 4-day subharmonic appear.

关键词： photochemical models bifurcation theory numerical solutions dynamical systems

Modern planktonic foraminifera from the eastern Indian Ocean

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Acta Oceanologica Sinica 2018年第10期37卷 46-63页

作者： MUNIR sonia SUN Jun Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin University of Science and Technology Research Centre for Indian Ocean Ecosystem Tianjin University of Science and Technology

A brief morphometric study of the recent planktonic foraminifera in the eastern Indian Ocean was provided with the taxonomic key to species, synonyms, SEM microphotographs of shells and chamber arrays. By recent classification, currently 20 species representing 13 genera and 6 families （Canderinidae, Heterohelicoidae, Hedbergellidae, Higerigerinoidae, Globigerinoidae, and Globorotaloidae） identified from the planktonic material of the eastern Indian Ocean up to a depth of 200 m. Their distribution in water （0-200 m） also reports on the new range of expansion in the eastern Indian Ocean, with Dentigloborotalia anfracta, Hastigerina pelagica, Streptochilus globigerus, Globigerinella calida, Globigerinella adamsi, Orcadia reidelii, Tenuitella parkerae, Tenuitella compressa, reported for the first time in this study area. In general, only around 50 planktonic species are valid worldwide, more specifically the species, e.g., H. pelagica, G. calida, G. adamsi, S. globigerus, O. riedeli, T. parkerae, T. compressa, which occur in the eastern Indian Ocean to fill the the paucity of the recent regional taxonomic literature and the problematic identification from the eastern Indian Ocean. This work aims to bridge this gap and help scientists, managers, educators and students to identify plankton foraminifers by using species notes and images.

关键词： planktonic foraminiferida Heterohelicoidae Hedbergellidae and Higerigerinoidae Globigerinoidae and Globorotaloidae eastern Indian Ocean

Brain-derived neurotrophic factor in main neurodegenerative diseases

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Neural Regeneration Research 2023年第3期18卷 554-555页

作者： Serena Camuso sonia Canterini Division of Neuroscience Department of PsychologyUniversity La SapienzaRomeItaly PhD Program in Behavioral Neuroscience Sapienza University of RomeRomeItaly

Discovered in pig brains in 1982,the brain-derived neurotrophic factor(BDNF)is one of the most studied and characterized neurotrophins in the central nervous *** recent years,BDNF has received considerable attention for its importance in the development and maintenance of normal brain *** is because BDNF plays an important role in crucial functions of the nervous system,such as the survival,differentiation,and maturation of neurons and glial cells as well as the actions of neuroprotection in adverse conditions,such as glutamatergic overstimulation,cerebral ischemia,hypoglycemia,and neurotoxicity(Kowiański et al.,2018).

关键词： stimulation diseases

The first snapshot study on horizontal distribution and identification of five peritrich ciliates (Genus Vorticella Linnaeus and Zoothamnium Bory de St. Vincent) from the eastern Indian Ocean

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Acta Oceanologica Sinica 2018年第10期37卷 79-85页

Epipont peritrich ciliates are one of the most sessilie protists that attached to the substrate of zooplankton communities especially copepods and crustaceans. Peritrich ciliates can be solitary or colonial form found from the coastal zones and embayment around the world. Present research report is the first snapshot study of the peritrich ciliates and the horizontal distribution in open waters from surface to 200 m depth in the eastern Indian Ocean. Recently, five peritrich ciliates, e.g., Vorticella oceanica, Zootharnnium alternans, Z. alrasheidi, Z. pelagicum, and Z. marinum were collected from plankton net tow samples during the cruise from April 10 to May 13, 2014. The characteristics of the peritrich ciliate were determined according to the shape of the zooids, the ciliary structure and the stalks. The morphometric shape, sizes and characters also explained by examination under light/scanning electron microscopy. Vorticella oceanica and Z. pelagicum showed their association with host such as diatom （i.e, Chaetoceros coarctatus） and copepod （Oithona brevicornis） including some individuals around the dinoflagellate species （Ceraitum tripose）. The distribution of these sessilid ciliates was dominated by the V. oceanica, Z. pelagicum and Z. rnarinurn at the southeast zone while the large colonies of Z. alrasheidi observed at the Bay of Bengal. This distribution can be influenced by substrate availability like diatom （Ch. coarctatus） and copepods （O. brevicornis）.

关键词： Vorticella oceanica Zoothamnium alternans Zoothamnium alrasheidi Zoothamnium marinum Zoothamnium pelagicum eastern Indian Ocean

Probing the potential of polyester for CO_2 capture

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Journal of Environmental Sciences 2014年第7期26卷 1423-1427页

作者： sonia Zulfiqar Muhammad Ilyas Sarwar Department of Chemistry School of Natural Sciences (SNS) National University of Sciences and Technology (NUST)Islamabad 44000 Pakistan Department of Chemistry Quaid-i-Azam University Islamabad 45320 Pakistan

Global warming, the major environmental issue confronted by humanity today, is caused by rising level of green house gases. Carbon capture and storage technologies offer potential for tapering CO2 emission in the atmosphere. Adsorption is believed to be a promising technology for CO2 capture. For this purpose, a polyester was synthesized by polycondensation of1,3,5-benzenetricarbonyl trichloride and cyanuric acid in pyridine and dichloromethane mixture. The polymer was then characterized using FT-IR, TGA, BET surface area and pore size analysis, FESEM and CO2 adsorption measurements. The CO2 adsorption capacities of the polyester were evaluated at a pressure of 1 bar and two different temperatures（273 and 298 K）.The performance of these materials to adsorb CO2 at atmospheric pressure was measured by optimum CO2 uptake of 0.244 mmol/g at 273 K. The synthesized polyester, therefore, has the potential to be exploited as CO2 adsorbent in pre-combustion capture process.

关键词： PolyesterCO2 captureTGAFESEM

Case Report： Description of a Patient with Trisomy 22 in Inbred Line

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Journal of Life Sciences 2013年第12期7卷 1312-1316页

作者： Leandro guti6rrez Flavia Leveroni Cristina Mayer Jorge Doldant Amada Rolon Ana Melnichuk Alejandro Laudicina sonia Bageston Alberto Fenocchio Laboratory of Human Genetics and Cytogenetic School of Natural Chemistry and Exact Sciences National University ofMisiones Posadas Misiones N3300MLL Argentina Laboratory of Cytogenetic Dr. Ram6n Madariaga Hospital Posadas Misiones N3300MLL Argentina Lexel SRL Divisi6n In Vitro Buenos Aires City Buenos Aires C1135ABO Argentina

Long arm trisomy of chromosome 22 or cat eye syndrome （OMIM#115470） is a disease with an enormous variability of clinical features, ranging from minor malformations like hypertelorism, to major ones, as congenital heart and renal disorders, combined with variable growth retardation. The authors report a case of a newborn female with clinical features of cat eye syndrome with trisomy 22 in inbred line, who died 35 days after birth. The clinical features at the time of diagnosis were： left preauricular appendix, low-set ears, hypertelorism, mongoloid palpebral apertures, right-sided microphthalmia, left-sided anophthalmia, cleft lip and palate, short neck, anomalous pulmonary venous return, severe lung hypertension, hyperechogenic little kidneys and clinodactyly of the fifth finger on the left side. Cerebral ultrasound showed dilatation of both lateral ventricles, with a callosum corpus difficult to evaluate. The cytogenetics diagnostic was made from peripheral blood by conventional cytogenetics techniques in two different laboratories, and confirmed by fluorescent in situ hybridization.

关键词： CES (cat eye syndrome) Smith Fraccaro Syndrome trisomy 22.

Non Existence of Shear in Bianchi Type-ⅢString Cosmological Models with Bulk Viscosity and Time-Dependent A Term

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Chinese Physics Letters 2011年第2期28卷 55-57页

作者： R.K.Tiwari sonia Sharma Department of Mathematics Govt.Model Science CollegeRewa(MP)India Department of Mathematics Rayat Polytechnic CollegeRopar(Punjab)India

We study the non existence of shear in locally rotationally symmetric Bianchi type-Ⅲstring cosmological models with bulk viscosity and variable cosmological termΛ.Exact solutions of the field equations are obtained by assuming the conditions:the bulk viscosity is proportional to the expansion scalar,ξ∝θ,expansion scalar is proportional to shear scalar,θ∝σ,and A is proportional to the Hubble *** coefficient of bulk viscosity is assumed to be a power function of mass *** corresponding physical interpretations of the cosmological solutions are also discussed.

关键词： parameter density viscosity

Determination and(Re)Parametrization of Rational Developable Surfaces

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Journal of Systems Science & Complexity 2015年第6期28卷 1426-1439页

作者： SHEN Liyong PREZ-DíAZ sonia School of Mathematical Sciences University of Chinese Academy of Sciences Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems Science Chinese Academy of Sciences Key Laboratory of Big Data Mining and Knowledge management Chinese Academy of Sciences Dpto de Física y Matemáticas Universidad de Alcalá

The developable surface is an important surface in computer aided design, geometric modeling and industrial manufactory. It is often given in the standard parametric form, but it can also be in the implicit form which is commonly used in algebraic geometry. Not all algebraic developable surfaces have rational parametrizations. In this paper, the authors focus on the rational developable surfaces. For a given algebraic surface, the authors first determine whether it is developable by geometric inspection, and then give a rational proper parametrization in the affrmative case. For a rational parametric surface, the authors also determine the developability and give a proper reparametrization for the developable surface.

关键词： Parametrization proper rational developable surface reparametrization