检索结果-南通市图书馆

Biomaterials Translational 2022年第2期3卷 102-104页

作者： ricardo Donate Maryam Tamaddon Viviana Ribeiro Mario Monzón J.Miguel Oliveira Chaozong Liu Departamento de Ingeniería Mecánica Grupo de Investigación en Fabricación Integrada y AvanzadaUniversidad de Las Palmas de Gran CanariaLas PalmasSpain Division of Surgery&Interventional Science University College LondonRoyal National Orthopaedic HospitalStanmoreUK B’s Research Group I3B’s-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoBarcoGuimarãesPortugal ICVS/3B’s-PT Government Associated Laboratory BragaGuimarãesPortugal.

Osteoarthritis is the most common chronic degenerative joint disease,recognized by the World Health Organization as a public health problem that affects millions of people *** project Biomaterials and Additive Manufacturing:Osteochondral Scaffold(BAMOS)innovation applied to osteoarthritis,funded under the frame of the Horizon 2020 Research and Innovation Staff Exchanges(RISE)program,aims to delay or avoid the use of joint replacements by developing novel cost-effective osteochondral scaffold technology for early intervention of *** multidisciplinary consortium of BAMOS,formed by international leading research centres,collaborates through research and innovation staff *** project covers all the stages of the development before the clinical trials:design of scaffolds,biomaterials development,processability under additive manufacturing,in vitro test,and in vivo *** paper reports the translational practice adopted in the project in in vivo assessment of the osteochondral scaffolds developed.

关键词： bone cartilage in vivo evaluation regenerative medicine tissue engineering

Expansion Planning for Renewable Integration in Power System of Regions with Very High Solar Irradiation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 485-494页

作者： Musfer Alraddadi Antonio J.Conejo ricardo M.Lima the Department of Electrical and Computer Engineering The Ohio State UniversityColumbusOH 43210USA the Department of Integrated Systems Engineering and the Department of Electrical and Computer Engineering The Ohio State UniversityColumbusOH 43210USA King Abdullah University of Science and Technology Thuwal 23955-6900Kingdom of Saudi Arabia

In this paper,we address the long-term generation and transmission expansion planning for power systems of regions with very high solar *** target the power systems that currently rely mainly on thermal generators and that aim to adopt high shares of renewable *** propose a stochastic programming model with expansion alternatives including transmission lines,solar power plants(photovoltaic and concentrated solar),wind farms,energy storage,and flexible combined cycle gas *** model represents the longterm uncertainty to characterize the demand growth,and the short-term uncertainty to characterize daily solar,wind,and demand *** use the Saudi Arabian power system to illustrate the functioning of the proposed model for several cases with different renewable integration *** results show that a strong dependence on solar power for high shares of renewable sources requires high generation capacity and storage to meet the night demand.

关键词： Generation and transmission expansion planning uncertainty solar power wind power

维普期刊数据库

Portugal's first major forensic case and the genesis of forensic toxicology:10 years of research to reconstruct the event

在线全文

学校读者我要写书评

暂无评论

Forensic Sciences Research 2019年第1期4卷 69-81页

作者： ricardo Jorge Dinis-Oliveira Department of Sciences IINFACTS–Institute of Research and Advanced Training in Health Sciences and TechnologiesUniversity Institute of Health Sciences(IUCS)CESPUCRLGandraPortugal UCIBIO-REQUIMTE Laboratory of ToxicologyDepartment of Biological SciencesFaculty of PharmacyUniversity of PortoPortoPortugal Department of Public Health and Forensic Sciences and Medical EducationFaculty of MedicineUniversity of PortoPortoPortugal

The"Crime of Flores Street"is one of the most famous cases of poisoning to divide public opinion in Portugal in the late 19th century, and it also demonstrated the weaknesses of the Portuguese medicolegal system and attested to the importance of toxicological analysis. Vicente Urbino de Freitas was a prominent doctor, graduating from the Faculty of Medicine of the University of Coimbra in 1875. He later became Professor of Physiology at the Porto Medical-Surgical School and author of a number of books on leprosy. In 1877, he married Maria das Dores Basto Sampaio Freitas, and this was followed by the death of a number of her close relatives in suspicious circumstances, notably her brother José António Sampaio Junior and nephew Mário Guilherme Augusto de Sampaio. This review aims to retell the story of Portugal's first significant medicolegal case as well as the accompanying judicial drama that gave birth to Forensic Toxicology in Portugal and prompted the medicolegal organization that exists today. This research was carried out over a 10-year period and repre-sents undeniable historical value given the rarity of the facts compiled. At the heart of this forensic case was the use of toxicological analyses in court for which the Chemist Antònio Joaquim Ferreira da Silva played a key role. This toxicological report revealed high concen-trations of morphine, delphinine and narceine in viscera and in Mario's urine. The Mario's cause of death was attributed to poisoning by opium alkaloids. Despite the strong judicial evidence, doubts still remains as to whether Vicente Urbino de Freitas was a"monster"or a victim of circumstances and a hapless martyr.

关键词： Forensic sciences forensic toxicology Vicente Urbino de Freitas António Joaquim Ferreira da Silva Medical-Surgical School Mário Guilherme Augusto de Sampaio

A Novel Iterative Velocity Control Algorithm and Its FPGA Implementation Based on Trigonometric Function

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2019年第2期28卷 237-245页

作者： WEN Quangang LIANG Yanchun Adriano Tavares ricardo Teixeira WU Chunguo Key Laboratory of Symbol Computation and Knowledge Engineering of Ministry of Education College of Computer Science and Technology Jilin University Zhuhai Laboratory of Key Laboratory of Symbol Computation and Knowledge Engineering of Ministry of Education Zhuhai College of Jilin University Department of Industrial Electronics University of Minho Campus de Azurm

The servo motor’s flexible acceleration/deceleration(acc/dec) control is an emerging research topic in the automation field. A velocity control algorithm based on trigonometric function is proposed in this *** required parameters, it transforms trigonometric calculations into elementary mathematical operations and calculates the velocity controlling values iteratively, which could avoid trigonometric calculation and reduce the computation time. Experimental results show that the proposed algorithm is suitable for implementation on field programmable gate arrays and achieves a flexible controlling, enhancing both the equipment’s stability and reliability. It is promising to significantly improve the high-speed computerized numerical control equipment’s controlling accuracy, without a huge hardware resource consumption.

关键词： Acceleration Velocity control Algorithm design and analysis Field programmable gate arrays Servomotors

Evaluation of total protein,peroxidase,and nutrients measured by pXRF for the determination of tissue rejuvenation/reinvigoration of Eucalyptus microcorys

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

林业研究:英文版 2023年第5期34卷 1563-1576页

作者： Júlio Cézar Tannure Faria Caius Ribeiro-Kumara William Macedo Delarmelina Filipe Aiura Namorato Dione Richer Momolli Anderson Cleiton José Enéas ricardo Konzen Dulcinéia de Carvalho Gilvano Ebling Brondani Department of Forestry and Wood Sciences Federal University of Espírito SantoJerônimo MonteiroEspírito SantoBrazil Department of Forest Sciences University of HelsinkiHelsinkiFinland Federal Institute of Education Science and Technology of Espírito SantoIbatibaEspírito SantoBrazil Department of Soil Science Federal University of LavrasLavrasMinas GeraisBrazil Department of Forest Engineering Federal University of Santa MariaSanta MariaRio Grande Do SulBrazil Department of Forestry Sciences Federal University of LavrasLavrasMinas GeraisBrazil Department Interdisciplinary Federal University of Rio Grande Do SulImbéRio Grande Do SulBrazil

Ontogenetic aging of tissues and the gradual decrease of adventitious rooting are known challenges for the clonal propagation of woody species,hampering clonal forestry *** study examined possible signatures of tissue rejuvenation/reinvigoration in different propagated materials of Eucalyptus microcorys by analyzing the total protein profile,peroxidase activity,macro-and micronutrient contents,and adventitious rooting of mini *** analyses were performed on *** shoots which were successfully obtained by seminal and grafting propagation,micropropagation with epicormic shoots,and indirect *** four mature trees used in the propagation,tissues from the one with the best propagation results were investigated for signs of tissue rejuvenation and/or *** individuals from each technique were randomly selected and transferred to a semi-hydroponic"channel"*** four weeks in the seedbed,the total protein,peroxidase activity,nutrient content and rooting of the mini cuttings were ***-PAGE enabled the differentiation of leaf samples obtained by grafting from the other propagation techniques,as revealed by two distinct *** obtained by micropropagation with epicormic shoots showed the highest peroxidase activity,while those obtained by seminal propagation and from the selected mature tree showed the lowest peroxidase activity.A portable X-ray fluorescence spectroscope(pXRF)identified adequate nutrient content in most of the nutrients tested in materials obtained by seminal and grafting propagation,and by indirect *** analysis of adventitious rooting showed that the highest rooting percentage was observed in mini cuttings from seminal propagation(75%)followed by indirect organogenesis(35%).Based on principal component analysis,it was concluded that rooting of mini cuttings from both seminal propagation and indirect organogenesis was associated with phosphorous,sulphur,and potassium

关键词： Adventitious rooting Juvenility Reinvigoration Rejuvenation Ontogenetic age

维普期刊数据库

An Explicit Formula for Two-Dimensional Singly-Periodic Regularized Stokeslets Flow Bounded by a Plane Wall

在线全文

学校读者我要写书评

暂无评论

Communications in Computational Physics 2018年第1期23卷 142-167页

作者： Forest O.Mannan ricardo Cortez Department of Mathematics Tulane UniversityNew OrleansLouisiana 70118-5665USA

We derive a closed form expression for the regularized Stokeslet in two space dimensions with periodic boundary conditions in the x-direction and a solid plane wall at y=*** accommodate the no-slip condition on the wall,a system of images for the regularized Stokeslets was *** periodicity is enforced by writing all elements of the image system in terms of a Green’s function whose periodic extension is *** the formulation is derived in the context of regularized Stokeslets,the expression for the traditional(singular)Stokeslet is easily found by taking the limit as the regularization parameter approaches *** new formulation is validated by comparing results of two test problems:the Taylor infinite waving sheet and the motion of a cylinder moving near a *** an example of an application,we use our formulation to compute the motion and flow generated by cilia using a model that does not prescribe the motion so that the beat period and synchronization of neighboring cilia are a result of the forces developed along the cilia.

关键词： Regularized Stokeslets singly-periodic flow method of images

Lagrangian Mesh Model with Regridding for Planar Poiseuille Flow

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2017年第6期22卷 112-132页

作者： Jingxuan Zhuo ricardo Cortez Robert Dillon Department of Mathematics and Statistics Washington State UniversityUSA Department of Mathematics Tulane UniversityUSA

Many biological settings involve complex fluids that have non-Newtonian mechanical responses that arise from suspended *** contrast,Newtonian fluids are liquids or mixtures of a simple molecular structure that exhibit a linear relationship between the shear stress and the rate of *** modeling complex fluids,the extra stress from the non-Newtonian contribution must be included in the governing *** this study we compare Lagrangian mesh and Oldroyd-B formulations of fluidstructure interaction in an immersed boundary *** start-up phase of planar Poiseuille flow between two parallel plates is used as a test case for the fluid *** Newtonian and Oldroyd-B fluids there exist analytical solutions which are used in the comparison of simulation and theoretical *** Lagrangian mesh results are compared with Oldroyd-B using comparable parameters.A regridding algorithm is introduced for the Lagrangian mesh *** show that the Lagrangian mesh model simulations with regridding produce results in close agreement with the Oldfoyd-B model.

关键词： Lagrangian mesh model Oldroyd-B immersed boundary method viscoelastic fluid regridding methods

Effects of meal size and proximal-distal segmentation on gastric activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第46期16卷 5861-5868页

作者： Madileine F Américo Marjorie V Ietsugu Fernando G Romeiro Luciana A Corá ricardo B Oliveira José ricardo A Miranda Department of Physics and Biophysics IBBUNESP-Sao Paulo State University Institute of Biological Sciences and Health ICBSUFMT-University of Mato Grosso Department of Clinical Medicine FMBUNESP-Sao Paulo State University Department of Clinical Medicine FMRPUSP-University of So Paulo UNCISAL-Alagoas State University of Health Sciences

AIM:To evaluate the effects of meal size and three segmentations on intragastric distribution of the meal and gastric motility,by ***:Twelve healthy volunteers were randomly assessed,twice,by *** test meal consisted of 60 or 180 mL of yogurt labeled with 64 MBq 99m Tc-tin *** and posterior dynamic frames were simultaneously acquired for 18 min and all data were analyzed in *** proximal-distal segmentations using regions of interest were adopted for both ***:Intragastric distribution of the meal between the proximal and distal compartments was strongly influenced by the way in which the stomach was divided,showing greater proximal retention after the 180 *** important finding was that both dominant frequencies (1 and 3 cpm) were simultaneously recorded in the proximal and distal stomach;however,the power ratio of those dominant frequencies varied in agreement with the segmentation adopted and was independent of the meal ***:It was possible to simultaneously evaluate the static intragastric distribution and phasic contractility from the same recording using our scintigraphic approach.

关键词： Gastric motility Phasic contractions Proximal stomach Scintigraphy Meal size

cAMP:A second messenger involved in the mechanism of midgut alkalinization in Lutzomyia longipalpis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2022年第4期29卷 1059-1070页

作者： Denise Barguil Nepomuceno Grasielle Caldas D’Ávila Pessoa Leonardo Barbosa Koerich Marcos Horácio Pereira Mauricio Roberto Viana Sant'Anna ricardo Nascimento Araújo Nelder Figueiredo Gontijo Laboratório de Fisiologia de Insetos Hematófagos Departamento de Parasitologia/ICBUniversidade Federal de Minas GeraisBelo HorizonteMGBrazil

The sand fly Lutzomyia longipalpis is the main vector of Leishmania infantum in the *** sand flies ingest sugar-rich solutions and blood,which are digested in the *** of nutrients is an essential function performed by digestive enzymes,which require appropriate physiological *** of the main aspects that influence enzymatic activity is the gut pH,which must be tightly *** second messengers are frequently involved in the coordination of tightly regulated physiological events,we investigated if the second messenger cAMP would participate in the process of alkalinization in the abdominal midgut of female *** midguts containing the indicator dye bromothymol-blue,cAMP stimulated the alkalinization of the midgut *** another technique based on the use of fluorescein as a pH indicator,we propose that cAMP is involved in the alkalinization of the midgut by activating HCO3-transport from the enterocyte's cytoplasm to the *** results strongly suggested that the carrier responsible for this process would be a HCO3−/Cl−antiporter located in the enterocytes’apical *** promotes the release of alkalinizing hormones in the hemolymph;however,when the enzyme adenylyl cyclase,responsible for cAMP production,was inhibited,we observed that the hemolymph from blood-fed ***’females did not stimulate midgut *** result indicated that hormone-stimulated alkalinization is mediated by *** the present study,we provide evidences that cAMP has a key role in the control of intestinal pH.

关键词： abdominal midgut alkalinization cAMP HCO_(3)^(-)/Cl^(-)antiport hormone Lulcomyia longipalpis

Gender inequalities in physical activity among adolescents from 64 Global South countries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Sport and Health Science 2022年第4期11卷 509-520页

作者： Luiza Isnardi Cardoso ricardo Andrea Wendt Caroline dos Santos Costa Gregore Iven Mielke Javier Brazo-Sayavera Asaduzzaman Khan Tracy L Kolbe-Alexander Inacio Crochemore-Silva Federal University of Pelotas PelotasRS 96010-040Brazil University of Sao Paulo Sao PauloSP 01153-000Brazil School of Public Health The University of QueenslandHerstonQLD 4006Australia University of the Republic MontevideoMontevideo 11200Uruguay

Purpose:The aims of this study were to(a)describe gender inequalities in physical activity(PA)among adolescents from Global South countries,and(b)investigate the relationship between gender inequalities in PA and contextual factors,such as geographic region,human development index,gender inequality index,and unemployment ***:We analyzed cross-sectional data from the Global School-Based Student Health Survey conducted in Global South countries between 2010 and 2020 among 13-to 17-year-old ***-context variables were retrieved from secondary data sources(World Health Organization,World Bank,and Human Development Reports).PA was assessed by a self-administered questionnaire querying the number of days in the past week in which participants were physically active for a total of at least 60 *** absolute gender inequalities were evaluated by the differences in the prevalence between boys and girls,95%confidence intervals(95%CIs)were estimated using the bootstrap *** inequalities were obtained through Poisson ***-analyses with random effects were used to calculate pooled estimates of absolute and relative ***:Based on 64 Global South countries/surveys,the prevalence of PA was 6.7 percentage points(p.p.)higher in boys than in girls,ranging from 0.5 *** Afghanistan to 15.6 *** Laos(I^(2)=85.1%).The pooled ratio for all countries showed that boys presented a PA prevalence 1.58 times higher than girls(95%CI:1.47-1.70)on *** highest absolute and relative inequalities were observed in high income *** with higher Human Development Index rankings and lower Gender Inequality Index rankings also presented greater gender ***:Given that girls are overall less active than boys across the globe,the findings of this study reinforce that macro-and micro-level changes should be actively sought if we aim to increase population levels of PA in adolescents and promote equity i

关键词： Adolescents Gender differences Physical activity Social inequalities Students

维普期刊数据库