检索结果-南通市图书馆

Hybrid magnetorheological elastomers enable versatile soft actuators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2022年第1期8卷 1546-1559页

作者： Miguel Angel Moreno-Mateos Mokarram Hossain Paul Steinmann daniel garcia-Gonzalez Department of Continuum Mechanics and Structural Analysis Universidad Carlos III de MadridAvda.de la Universidad 3028911LeganésMadridSpain Zienkiewicz Centre for Computational Engineering Faculty of Science and EngineeringSwansea UniversitySA18ENSwanseaUK Institute of Applied Mechanics University of Erlangen-NurembergEgerland Str.5ErlangenGermany Glasgow Computational Engineering Centre School of EngineeringUniversity of GlasgowG128QQGlasgowUK

Recent advances in magnetorheological elastomers(MREs)have posed the question on whether the combination of both soft-and hard-magnetic particles may open new routes to design versatile multifunctional ***,we conceptualise ultra-soft hybrid MREs(≈1–10 kPa stiffness)combining experimental and computational ***,a comprehensive experimental characterisation is *** results unravel that the magneto-mechanical performance of hybrid MREs can be optimised by selecting an adequate mixing ratio between ***,a multi-physics computational framework provides insights into the synergistic magneto-mechanical interactions at the *** particles amplify the magnetisation and hard particles contribute to torsional *** numerical results suggest that the effective response of hybrid MREs emerges from these intricate ***,we uncover exciting possibilities to push the frontiers of MRE *** are demonstrated by simulating a bimorph beam that provides actuation flexibility either enhancing mechanical bending or material stiffening,depending on the magnetic stimulation.

关键词： versatile magneto enable

Enclosure enhancement of flight performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2014年第6期4卷 42-48页

作者： Mehdi Ghommem daniel garcia Victor M.Calo Center for Numerical Porous Media (Num Por) King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia Mechanical Engineering Center for Numerical Porous Media (Num Por)King Abdullah University of Science and Technology Thuwal 23955-6900Kingdom of Saudi Arabia Applied Mathematics & Computational Science Earth Science & Engineering Center for Numerical Porous Media (Num Por) King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia

We use a potential flow solver to investigate the aerodynamic aspects of flapping flights in enclosed spaces. The enclosure effects are simulated by the method of images. Our study complements previous aerodynamic analyses which considered only the near-ground flight. The present results show that flying in the proximity of an enclosure affects the aerodynamic performance of flapping wings in terms of lift and thrust generation and power consumption. It leads to higher flight efficiency and more than 5% increase of the generation of lift and thrust.

关键词： flapping flight enclosure effects unsteady aerodynamics

Give progesterone a chance

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2014年第15期9卷 1422-1424页

作者： Florencia Labombarda daniel garcia-Ovejero Laboratory of Neuroendocrine Biochemistry Institute of Biology and Experimental Medicine CONICET Vuelta de Obligado 2490Buenos AiresArgentina Departament of Human Biochemistry School of MedicineBuenos Aires University Paraguay 2155Buenos AiresArgentina Neuroinflammation Laboratory National Hospital For Paraplegics(SESCAM) ToledoSpain

There is currently no standard pharmacological treatment for spinal cord injury. Here, we suggest that progesterone, a steroid hormone, may be a promising therapeutical candidate as it is already for traumatic brain injury, where it has reached phase II clinical trials. We rely on previous works showing anti-inflammatory, neuroprotective and promyelinating roles for progesterone after spinal cord injury and in our recent paper, in which we demonstrate that progesterone diminishes lesion, preserves white matter integrity and improves locomotor recovery in a clinically relevant model of spinal cord lesion.

关键词： spinal cord injury myelin trauma neuroprotection progesterone

HERBICIDES THAT INHIBIT ACETOLACTATE SYNTHASE

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2022年第1期9卷 155-160页

作者： Thierry LONHIENNE Mario daniel garcia Yu Shang LOW Luke W.GUDDAT School of Chemistry and Molecular Bioscience The University of QueenslandQueensland 4072Australia

1 INTRODUCTION Herbicides are an essential pillar in modern agricultural *** are used to selectively reduce the growth of weeds in crops and natural *** weed mitigating chemicals date back to Roman times and include substances as simple as table salt,sulfuric acid and carbon ***,these were non-selective,required high application rates and could be toxic not only to the target weeds but to other plants and to *** first major advance in the development of tailored herbicides began in the mid 1940s with the development of the first organic growth regulators such as 2,4 dichlorophenoxyacetic acid(2,4-D)[1].The next major advance came in the 1970s with the discovery of glyphosate[2],marketed as Roundup,a herbicide that is routinely used to eradicate broad leaf weeds and grasses.

关键词： crops weed routine

Takotsubo cardiomyopathy:A comprehensive review

在线全文

学校读者我要写书评

暂无评论

World Journal of Cardiology 2022年第6期14卷 355-362页

作者： Walker Barmore Himax Patel Sean Harrell daniel garcia Joe B Calkins Jr Department of Internal Medicine Augusta University Medical CenterAugustaGA 30912United States Department of Cardiovascular Medicine Augusta University Medical CenterAugustaGA 30912United States

Takotsubo cardiomyopathy(TCM),also known as stress cardiomyopathy,occurs in the setting of catecholamine surge from an acute *** cardiomyopathy mimics acute myocardial infarction in the absence of coronary *** classic feature of TCM is regional wall motion abnormalities with characteristic ballooning of the left *** etiology of the stressor is often physical or emotional stress,however iatrogenic causes of TCM have been reported in the *** our review,we discuss medications,primarily the exogenous administration of catecholamines,and a wide array of procedures with subsequent development of iatrogenic *** is unique in that it is transient and has favorable outcomes in most ***,beta-blockers and ACE-inhibitors have been prescribed in individuals with cardiomyopathy;however,unique to TCM,no specific treatment is required other than temporary supportive measures as this process is ***,no improvement in mortality or recurrence have been reported in patients on these *** aim of this review is to elucidate on the iatrogenic causes of TCM,allowing for prompt recognition and management by clinicians.

关键词： Takotsubo Cardiomyopathy Iatrogenic Heart Failure Myocardial Infarction

Efficiency and effectiveness of systems for the treatment of domestic wastewater based on subsurface flow constructed wetlands in Jarabacoa, Dominican Republic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Water Science and Engineering 2024年第2期17卷 118-128页

作者： Yvelisse Pérez Enmanuel Vargas daniel garcia-Cortes William Hernandez Humberto Checo Ulises Jauregui-Haza Area de Ciencias Basicas y Ambientales Instituto Tecnologico de Santo Domingo(INTEC)Avenida de Los Proceres 49Los Jardines del NorteSanto Domingo 10602Dominican Republic Ministry of Environment and Natural Resources Calle Cayetano Germosen esq.Ave.LuperonEl PedregalSanto Domingo 11107Dominican Republic Plan Yaque Calle Estela Geraldino 14 AltosJarabacoa 41000Dominican Republic Institute of Technologies and Applied Sciences University of HavanaHavana 10400Cuba

Constructed wetlands(CwW)are well known nature-based systems for water *** study evaluated the efficiency and effectiveness of seven domestic wastewater treatment systems based on horizontal flow CWs in Jarabacoa,the Dominican *** results showed that the CWs were efficient in reducing the degree of contamination of wastewater to levels below the Dominican wastewater discharge standards for parameters such as the 5-day biochemical oxygen demand(BOD5)and chemical oxygen demand,but not for the removal of phosphorus and fecal *** addition,a horizontal flow subsurface wetland in the peri-urban area El Dorado was evaluated in terms of the performance of wastewater treatment in tropical climatic *** concentrations of heavy metals,such as zinc,copper,chromium,and iron,were found to decrease in the effluent of the wetland,and the concentrations for nickel and manganese tended to *** levels of heavy metals in the effluent were lower than the limit values of the Dominican wastewater discharge *** construction cost of these facilities was around 200 USD per population equivalent,similar to the cost in other countries in the same *** study suggested some solutions to the improved performance of CWs:selection of a microbial flora that guarantees the reduction of nitrates and nitrites to molecular nitrogen,use of endemic plants that bioaccumulate heavy metals,combination of constructed wetlands with filtration on activated carbon,and inclusion of water purification processes that allow to evaluate the reuse of treated water.

关键词： Domestic wastewater Constructed wetland BOD COD Pathogens Heavy metals

Effect of operational parameters on the performance of an anaerobic sequencing batch reactor(AnSBR)treating protein-rich wastewater

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2024年第1期17卷 89-99页

作者： Zhe Deng Julian Muñoz Sierra Ana Lucia Morgado Ferreira daniel Cerqueda-garcia Henri Spanjers Jules B.van Lier Delft University of Technology Faculty of Civil Engineering and GeosciencesStevinweg 12628 CNDelftthe Netherlands Veolia Water Technologies Techno Center Netherlands B.V.-Biothane Tanthofdreef 212623 EWDelftthe Netherlands KWR Water Research Institute Groningenhaven 7P.O.Box 10723430 BBNieuwegeinthe Netherlands Institute of Ecology.A.C Cluster Cientifico y Tecnologico BioMimic®Carretera Antigua a Coatepec 351El Haya91073XalapaVeracruzMexico

Treating protein-rich wastewater using cost-effective and simple-structured single-stage reactors presents several *** this study,we applied an anaerobic sequencing batch reactor(AnSBR)to treat protein-rich wastewater from a *** focused on identifying the key factors influencing the removal of chemical oxygen demand(COD)and the settling performance of the *** AnSBR achieved a maximum total COD removal of 90%,a protein degradation efficiency exceeding 80%,and a COD to methane conversion efficiency of over 70%at organic loading rates of up to 6.2 g COD L^(-1)d^(-1).We found that the variations in both the organic loading rate within the reactor and the hydraulic retention time in the buffer tank had a significant effect on COD *** hydraulic retention time in the buffer tank and the reactor,which determined the ammonification efficiencies and the residual carbohydrate concentrations in the reactor liquid,affected the sludge ***,the genus Clostridium sensu stricto 1,known as protein-and lipids-degraders,was predominant in the *** analysis showed a significant correlation between the core microbiome and ammonification efficiency,highlighting the importance of protein degradation as the governing process in the *** results will provide valuable insights to optimise the design and operation of AnSBR for efficient treatment of protein-rich wastewater.

关键词： Anaerobic digestion Anaerobic sequencing batch reactor (AnSBR) Protein Microbial community Slaughterhouse wastewater

Impact of glacier changes and permafrost distribution on debris flows in Badswat and Shishkat catchments,Northern Pakistan

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 Mountain Science 2023年第12期20卷 3687-3702页

作者： HASSAN Wajid SU Feng-huan LIU Wei-ming HASSAN Javed HASSAN Muzammil BAZAI Nazir Ahmed WANG Hao YANG Ze-wen ALI Muzaffar CASTELLANOS daniel garcia Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China China-Pakistan Joint Research Center on Earth Sciences CAS-HECIslamabad 45320Pakistan University of Chinese Academy of Sciences Beijing 100049China DTU Space Technical University of DenmarkKongens Lyngby 2800Denmark Department of Environmental Science Karakoram International UniversityGilgit-Baltistan 15100Pakistan Key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Instituto de Ciencias de la Tierra Jaume Almera ICTJA-CSICSoléi Sabarís s/nBarcelona 08028Spain

Knowledge of glacier changes and associated hazards is of great importance for the safety consideration of the population and infrastructure in the mountainous regions of Upper Indus Basin(UIB).In this study,we assessed the variations in glacier velocity,glacier surface elevation change,meteorological conditions,and permafrost distribution in Badswat and Shishkat catchments located in UIB to access the potential impact on the occurrence of debris flow in both *** find that the glacier surface velocity increased during the debris flow event in the Badswat catchment and the mean daily temperature was 3.7℃to 3.9℃higher in most of the *** enhanced glacier surface elevation lowering period coincide with the rise in temperature during spring and autumn months between 2015 to 2019 in Badswat *** source region of debris flow falls within the lower boundary of permafrost occurrence zone and lies below the 0℃isotherm during late spring and summer *** Shishkat catchment the 0℃isotherm reaches above the debris flow source area during August and the glacier do not show any significant variations in velocity and surface elevation *** debris flow source area is adjacent to the slow-moving rock glacier in Shishkat catchment while in Badswat catchment the debris flow initiated from the former glacier *** catchments are largely glacierized and thus sensitive to changes in climatic conditions and changes in the cryosphere response possess significant threats to the population *** monitoring of cryosphere-climate change in the region can contribute toward the improvement of disaster risk reduction and mitigation policies.

关键词： Cryosphere change Climate change Debris flow Remote sensing Permafrost Cryosphere hazard

Exploring the factors affecting carbon and nutrient concentrations in tree biomass components in natural forests,forest plantations and short rotation forestry

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2018年第4期5卷 498-515页

作者： Roque Rodriguez-Soalleiro Cristina Eimil-Fraga Esteban Gomez-Garda Juan daniel garcia-Villabrille Alberto Rojo-Alboreca Fernando Munoz Nerea Oliveira Hortensia Sixto Cesar Perez-Cruzado Sustainable Forest Management Unit (UXFS) Department of Plant Production and Engineering ProjectsUniversidade de Santiago de Compostela (USC)Rua Benigno LedoCampus Terra27002 LugoSpain Centro de Investigacion Forestal de Lourian Xunta de Galicia.Carretera de Marin km 3.536153 PontevedraSpain Sustainable Forest Management Unit (UXFS) Department of Agroforestry EngineeringUniversldade de Santiago de Compostela (USC)LugoSpain Universidad de Concepcion Facultad de Ciencias ForestalesVlctona631 ConcepcionChile Forest Systems and Resources Department Centre for Forest ResearchINIACrta. de la Coruna km 7.528040MadridSpain

Background: Coupling biomass models with nutrient concentrations can provide sound estimations of carbon and nutrient contents, enabling the improvement of carbon and nutrient balance in forest ecosystems. Although nutrient concentrations are often assumed to be constant for some species and specific tree components, at least in mature stands,the concentrations usually vary with age, site index and even with tree density. The main objective of this study was to evaluate the sources of variation in nutrient concentrations in biomass compartments usually removed during harvesting operations, covering a range of species and management conditions: semi-natural forest, conventional forest plantations and short rotation forestry(SRF). Five species(Betula pubescens, Quercus robur, Eucalyptus globulus, Eucalyptus nitens and Populus spp.) and 14 genotypes were considered. A total of 430 trees were sampled in 61 plots to obtain 6 biomass components:leaves, twigs, thin branches, thick branches, bark and wood. Aboveground leafless biomass was pooled together *** concentrations of C, N, K, P, Ca, Mg, S, Fe, Mn, Cu, Zn and B were measured and the total biomass of each sampled tree and plot were determined. The data were analysed using boosted regression trees and conventional ***: The main sources of variation in nutrient concentrations were biomass component > > genotype(species) ≈ age >tree diameter. The concentrations of Ca, Mg and K were most strongly affected by genotype and age. The concentrations of P, K, Ca, Mg, S and Cu in the wood component decreased with age, whereas C concentrations increased, with a trend to reach 50% in the older trees. In the SRF, interamerican poplar and P. trichocarpa genotypes were comparatively more efficient in terms of Ca and K nutrient assimilation index(NAI)(+65-85%) than eucalypts, mainly because leafless biomass can be removed. In the conventional eucalypt plantations(rotation 15 years), debarking the wood at logg

关键词： Nutrient removal Biomass crops Poplar genotypes Eucolyptus Oak Birch Plantation sustainability