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IEEE International Conference on Robotics and Automation (ICRA)

作者： Gal Tibi Ela Sachyani Michael Layani Shlomo Magdassi Amir Degani Technion's Autonomous Systems Program Technion - Israel Institute of Technology Haifa Israel Casali Center Hebrew University of Jerusalem Jerusalem Israel Civil and Environmental Engineering Department Israel Institute of Technology Haifa Israel

By bonding micron-thin polymer layers with an electrically conductive layer, we can utilize the bi-metal effect to create a soft, thin, electrically-activated thermal actuator (ETA), which can be used in printed soft robots. Using ETAs have shown quite remarkable potential in previous works. However, to reveal their true capabilities, we propose to utilize a multi-layered ETA. In this research, we analytically model the actuator for both the bi-, and more importantly, tri-layer ETAs and analyze their behavior. We develop a simple intuitive model to better explain the benefits of the tri-layer actuation and to estimate the optimal design parameters. We verify the models by conducting an experiment to measure the curvature change for different third layer thicknesses. The experiments show a significant improvement in performance of the tri-layer actuators and display a good fit between the simplified analytic model and the full model.

关键词： Actuators Analytical models Robot sensing systems Polymers Elasticity Springs

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Performances and fouling of entrapped-cells-based anaerobic forward osmosis membrane bioreactor

Performances and fouling of entrapped-cells-based anaerobic ...

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Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017

作者： Juntawang, Chaipon Rongsayamanont, Chaiwat Khan, Eakalak Environmental and Conservation Sciences Program North Dakota State University FargoND58108 United States Research Center for Environmental Assessment and Technology for Hazardous Waste Management Faculty of Environmental Management Prince of Songkla University Hat Yai Songkhla90112 Thailand Department of Civil and Environmental Engineering North Dakota State University FargoND58108 United States

ISBN: (纸本)9781510863682

A novel entrapped cells-based-forward osmosis membrane bioreactor (E-FOMBR) was developed for domestic wastewater treatment. Its performances and fouling were investigated in comparison with suspended cells-based-forward osmosis membrane bioreactor (S-FOMBR). E-FOMBR and S-FOMBR were operated side by side under the same conditions with two draw solutions (NaCl and (NH4)2SO4). Permeate flux decline was contributed by reverse salt flux and membrane fouling. The membrane fouling especially irreversible fouling in S-FOMBR was more severe than that in E-FOMBR. The effects of salt accumulation on system performances were investigated. E-FOMBR provided consistent removal of soluble chemical oxygen demand as well as methane production. Deterioration of biological activity due to substantial accumulation of salt, especially in S-FOMBR, was observed. Biofouling and inorganic scaling coexisted on membrane surface, with C, O, Na, S, and Cl identified on the draw solution side and C, O, Na, S, Cl, Mg, Al, Si, P, K, Ca, and Fe identified on the feed solution side when NaCl was used as a draw solution. For foulants when (NH4)2SO4 was applied as a draw solution, C, O, P, S, Ca, Fe, and Al were detected on the draw solution side and C, O, P, S, Ca, Fe, Cl, and Si were on the feed solution side. The superiority of E-FOMBR over S-FOMBR included higher and more stable system performances, higher flux and longer operation time. © 2017 Water Environment Federation

关键词： Bioreactors

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INTRODUCTION

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Bulletin of the American Meteorological Society 2024年第8期105卷 S1-S11页

作者： Boyer, T. Blunden, J. Dunn, R.J.H. NOAA/NESDIS National Centers for Environmental Information Silver Spring Maryland NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Met Office Hadley Centre Exeter United Kingdom European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland Scripps Institution of Oceanography University of California San Diego La Jolla California NOAA/NWS National Centers for Environmental Prediction Climate Prediction Center College Park Maryland Brandenburg University of Technology (BTU) Cottbus-Senftenberg Germany Servicio Meteorológico Nacional Buenos Aires Argentina NOAA/OAR Physical Sciences Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Bonn Germany Center for Geophysical Research and School of Physics University of Costa Rica San José Costa Rica Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Centro Nacional de Monitoramento e Alertas de Desastres Naturais CEMADEN São Paulo Brazil Université Grenoble Alpes Institut des Géosciences de l’Environnement IRD CNRS Grenoble INP Grenoble France Hampton University Hampton Virginia Seychelles Meteorological Authority Mahe Seychelles Section for Glaciers Ice and Snow Norwegian Water Resources and Energy Directorate Oslo Norway National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany NOAA Global Monitoring Laboratory Boulder Colorado Servicio Nacional de Meteorología e Hidrología del Perú Lima Perú Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Department o

In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—carbon dioxide, methane, and nitrous oxide—all increased to record-high levels. The annual global average carbon dioxide concentration in the atmosphere rose to 419.3±0.1 ppm, which is 50% greater than the pre-industrial level. The growth from 2022 to 2023 was 2.8 ppm, the fourth highest in the record since the 1960s. The combined short-term effects of El Niño and the long-term effects of increasing levels of heat-trapping gases in the atmosphere contributed to new records for many essential climate variables reported here. The annual global temperature across land and oceans was the highest in records dating as far back as 1850, with the last seven months (June–December) having each been record warm. Over land, the globally averaged temperature was also record high. Dozens of countries reported record or near-record warmth for the year, including China and continental Europe as a whole (warmest on record), India and Russia (second warmest), and Canada (third warmest). Intense and widespread heatwaves were reported around the world. In Vietnam, an all-time national maximum temperature record of 44.2°C was observed at Tuong Duong on 7 May, surpassing the previous record of 43.4°C at Huong Khe on 20 April 2019. In Brazil, the air temperature reached 44.8°C in Araçuaí in Minas Gerais on 20 November, potentially a new national record and 12.8°C above normal. The effect of rising temperatures was apparent in the cryosphere, where snow cover extent by June 2023 was the smallest in the 56-year record for North America and seventh smallest for the Northern Hemisphere overall. Heatwaves contributed to the greatest average mass balance loss for Alpine glaciers around the world since the start of the record in 1970. Due to rapid volume loss beginning in 2021, St. A

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A hydro-mechanical erosion analytical model for sand prediction 50

A hydro-mechanical erosion analytical model for sand predict...

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50th US Rock Mechanics / Geomechanics Symposium 2016

作者： Gravanis, E. Sarris, E. Papanastasiou, P. Department of Civil Engineering and Geomatics Cyprus University of Technology Limassol Cyprus Department of Engineering Oil and Gas Program University of Nicosia Nicosia Cyprus Department of Civil and Environmental Engineering University of Cyprus Nicosia Cyprus

ISBN: (纸本)9781510828025

Sand production is one of the major research subjects in petroleum industry. The physical processes that dominate the problem depend on the in-situ stress field and the hydro-mechanical conditions (i.e. the state of the material). The problem is usually dealt with either experimentally or numerically due to the complexity of the governing equations. In our previous work, we introduced an erosion model which is built upon the physics (fluid-solid poro-mechanical coupling) usually incorporated in erosion models for the prediction of sand production. In this work we briefly outline the mathematical framework upon which our sand production model works due to erosion. The focus of this analysis is the parametric investigation of the material parameters that dominate the poro-elastoplastic constitutive model (cohesion and friction angle) for weak unconsolidated formations. Typically such formations are dominated by plastic compaction upon loading and are characterized by low cohesive strength (low cohesion) but significant frictional stress dependent strength (high friction angle). Copyright 2016 ARMA, American Rock Mechanics Association.

关键词： Erosion

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Torsional effect on track-support structures of railway turnouts crossing impact

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Journal of Transportation engineering 2017年第2期143卷 1页

作者： Siew, James Sae Mirza, Olivia Kaewunruen, Sakdirat JK Williams Contracting Pty Ltd. PenrithNSW Australia Civil Engineering Program School of Civil Engineering Univ. of Western Sydney PenrithNSW2057 Australia School of Civil Engineering Western Sydney Univ. PenrithNSW2057 Australia Birmingham Centre for Railway Research and Education School of Engineering Univ. of Birmingham BirminghamB15 2TT United Kingdom RailCorp SydneyNSW2000 Australia Dept. of Civil and Environmental Engineering Massachusetts Institute of Technology CambridgeMA02139-4307 United States

The introduction of special crossings and rail turnouts provides flexibility in the rail network as it allows for vehicles to switch between various tracks, thereby maximizing the utilization of current infrastructure. Turnouts are a costly and critical feature to a rail system as they suffer adverse operational loads, compared with a straight rail track, and thus require regular maintenance. This leads to the question of whether a turnout can be justified for flexibility against upkeep costs throughout the life of the turnout. Therefore, great consideration is given to the interaction between the turnout components and reducing wear in service, as failed components may have adverse effects on the performance of neighboring components. This paper presents a development of three-dimensional (3D) finite-element (FE) model, fostering nonlinearities in materials' behaviors, to analyze the forces and reactions in a railway turnout system. The analysis provides new findings of critical sections in the turnout and further enables alterations to be made to the initial design of members to accommodate for the increased effects. The FE model is composed of standard concrete sleepers with 60-kg=m rail and a tangential turnout radius of 250 m. The turnout structure is supported by a ballast layer, which is represented by a deformable solid. The FE model is the first in the world to predict the torsional behavior of the turnout and its fragile support by considering multiwheel impacts, which would simulate in-service and cyclic loading and will be adapted as a set of concentrated loads to represent a coupled locomotive negotiating the turnout. The simulations demonstrate the significance of the third medium to suppress the torsional effect of the crossing forces on supporting bearers. © ASCE.

关键词： Railroads

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Iran in transition (vol 393, pg 1984, 2019)

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LANCET 2019年第10186期393卷 2124-2124页

作者： Danaei, G. Farzadfar, F. Kelishadi, R. [a]Department of Global Health and Population and Department of Epidemiology Harvard T H Chan School of Public Health Boston MA USA Department of Global Health and Population and Department of Epidemiology Harvard T H Chan School of Public Health Boston MA USA [b]Scientific Association for Public Health in Iran Boston MA USA Scientific Association for Public Health in Iran Boston MA USA [c]Non-Communicable Diseases Research Center Endocrinology and Metabolism Population Sciences Institute Tehran University of Medical Sciences Tehran Iran Non-Communicable Diseases Research Center Endocrinology and Metabolism Population Sciences Institute Tehran University of Medical Sciences Tehran Iran [d]Endocrinology and Metabolism Research Center Tehran University of Medical Sciences Tehran Iran Endocrinology and Metabolism Research Center Tehran University of Medical Sciences Tehran Iran [e]Diabetes Research Center Tehran University of Medical Sciences Tehran Iran Diabetes Research Center Tehran University of Medical Sciences Tehran Iran [f]Endocrinology and Metabolism Clinical Sciences Institute Department of Health Management and Economics Tehran University of Medical Sciences Tehran Iran Endocrinology and Metabolism Clinical Sciences Institute Department of Health Management and Economics Tehran University of Medical Sciences Tehran Iran [g]Department of Global Health and Public Policy Tehran University of Medical Sciences Tehran Iran Department of Global Health and Public Policy Tehran University of Medical Sciences Tehran Iran [h]Department of Epidemiology and Biostatistics Tehran University of Medical Sciences Tehran Iran Department of Epidemiology and Biostatistics Tehran University of Medical Sciences Tehran Iran [i]School of Public Health Tehran University of Medical Sciences Tehran Iran School of Public Health Tehran University of Medical Sciences Tehran Iran [j]Faculty of Medicine Tehran University of Medical Sciences Tehran Iran Faculty of Medicine Te

Summary Being the second-largest country in the Middle East, Iran has a long history of civilisation during which several dynasties have been overthrown and established and health-related structures have been reorganised. Iran has had the replacement of traditional practices with modern medical treatments, emergence of multiple pioneer scientists and physicians with great contributions to the advancement of science, environmental and ecological changes in addition to large-scale natural disasters, epidemics of multiple communicable diseases, and the shift towards non-communicable diseases in recent decades. Given the lessons learnt from political instabilities in the past centuries and the approaches undertaken to overcome health challenges at the time, Iran has emerged as it is today. Iran is now a country with a population exceeding 80 million, mainly inhabiting urban regions, and has an increasing burden of non-communicable diseases, including cardiovascular diseases, hypertension, diabetes, malignancies, mental disorders, substance abuse, and road injuries.

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Author Correction: Stretchable, dynamic covalent polymers for soft, long-lived bioresorbable electronic stimulators designed to facilitate neuromuscular regeneration

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Nature communications 2021年第1期12卷 415页

作者： Yeon Sik Choi Yuan-Yu Hsueh Jahyun Koo Quansan Yang Raudel Avila Buwei Hu Zhaoqian Xie Geumbee Lee Zheng Ning Claire Liu Yameng Xu Young Joong Lee Weikang Zhao Jun Fang Yujun Deng Seung Min Lee Abraham Vázquez-Guardado Iwona Stepien Ying Yan Joseph W Song Chad Haney Yong Suk Oh Wentai Liu Hong-Joon Yoon Anthony Banks Matthew R MacEwan Guillermo A Ameer Wilson Z Ray Yonggang Huang Tao Xie Colin K Franz Song Li John A Rogers Center for Bio-Integrated Electronics Northwestern University Evanston IL 60208 USA. Querrey Simpson Institute for Biotechnology Northwestern University Evanston IL 60208 USA. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA. Department of Bioengineering University of California Los Angeles Los Angeles CA 90095 USA. Division of Plastic and Reconstructive Surgery Department of Surgery National Cheng Kung University Hospital College of Medicine National Cheng Kung University Tainan 70456 Taiwan. International Research Center for Wound Repair and Regeneration National Cheng Kung University Tainan 70456 Taiwan. School of Biomedical Engineering Korea University Seoul 02841 Republic of Korea. Interdisciplinary Program in Precision Public Health Korea University Seoul 02841 Republic of Korea. Department of Mechanical Engineering Northwestern University Evanston IL 60208 USA. Department of Medicine University of California Los Angeles Los Angeles CA 90095 USA. State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology 116024 Dalian China. Department of Engineering Mechanics Dalian University of Technology 116024 Dalian China. International Research Center for Computational Mechanics Dalian University of Technology 116024 Dalian China. State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University 310027 Hangzhou China. Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University 200240 Shanghai China. Center for Developmental Therapeutics Chemistry Life Processes Institute Northwestern University Evanston IL 60208 USA. Department of Neurological Surgery Washington University School of Medicine St. Louis MO 63110 USA. Center for Advanced Molecular Imaging Northwestern University Evanston IL

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Variation of Critical Rainfall Duration upon Its Magnitude in Middle and Lower Yom Basin,Thailand

Variation of Critical Rainfall Duration upon Its Magnitude i...

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作者： P.Klongvessa M.Lu S.Chotpantarat Department of Civil and Environmental Engineering Graduate School of EngineeringNagaoka university of Technology Department of Geology Faculty of ScienceChulalongkorn University Research Program in Control of Hazardous Contaminants in Raw Water Resources for Water Scarcity Resilience Center of Excellence on Hazardous Substance ManagementChulalongkorn University

In many flood simulations,critical rainfall duration,defined as duration of rainfall which causes a critical flood,is assumed to be ***,in some area,the critical rainfall duration varies upon its magnitude and assuming the fixed critical rainfall duration may underestimate an extreme peak *** middle and lower Yom basin,Thailand,is one of the areas where a larger flood appears to coincide with longer critical rainfall *** this study,we have investigated the variation of critical rainfall duration in that *** conceptual model was developed from HEC-HMS and HEC-RAS *** upstream and downstream parts of the area were calibrated ***,uniform 2-,5-,and 10-year rainfalls with 24-,48-,and 72-hour durations were *** model successfully reproduced the variation of critical rainfall duration as 48 hours for 2-and 5-year rainfalls and 72 hours for 10-year *** variation is caused by a high percolation rate over the upstream *** this percolation,some portion of rainfall over the upstream part is ***,most of the flood water comes from the downstream part which has short travel ***,when the rainfall is larger,the influence of percolation is less.

关键词： Critical Rainfall Duration Flood Yom Basin Percolation

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Large-scale production of extracellular vesicles: Report on the “massivEVs” ISEV workshop

Journal of Extracellular Biology

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Journal of Extracellular Biology 2022年第10期1卷 e63页

作者： Paolini, Lucia Monguió-Tortajada, Marta Costa, Marta Antenucci, Fabio Barilani, Mario Clos-Sansalvador, Marta Andrade, André Cronemberger Driedonks, Tom A. P. Giancaterino, Sara Kronstadt, Stephanie M. Mizenko, Rachel R. Nawaz, Muhammad Osteikoetxea, Xabier Pereira, Carla Shrivastava, Surya Boysen, Anders Toftegaard van de Wakker, Simonides Immanuel van Herwijnen, Martijn J. C. Wang, Xiaoqin Watson, Dionysios C. Gimona, Mario Kaparakis-Liaskos, Maria Konstantinov, Konstantin Lim, Sai Kiang Meisner-Kober, Nicole Stork, Michiel Nejsum, Peter Radeghieri, Annalisa Rohde, Eva Touzet, Nicolas Wauben, Marca H. M. Witwer, Kenneth W. Bongiovanni, Antonella Bergese, Paolo Department of Molecular and Translational Medicine University of Brescia Brescia Italy Center for Colloid and Surface Science (CSGI) Department of Chemistry University of Florence Sesto Fiorentino (FI) Italy Department of Medical and Surgical Specialties Radiological Sciences and Public Health University of Brescia Brescia Italy CREC Research Program Health Science Research Institute Germans Trias i Pujol (IGTP) Badalona Spain Heart Institute (iCor) Cardiology Department Germans Trias i Pujol University Hospital Badalona Spain iBET Instituto de Biologia Experimental e Tecnológica Oeiras Portugal Instituto de Tecnologia Química e Biológica António Xavier Universidade Nova de Lisboa Oeiras Portugal Department of Veterinary and Animal Sciences University of Copenhagen Copenhagen Denmark Laboratory of Regenerative Medicine ‒ Cell Factory Department of Transfusion Medicine and Hematology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano Italy REMAR-IGTP Group Germans Trias i Pujol Research Institute (IGTP) & Nephrology Department University Hospital Germans Trias i Pujol (HUGTiP) Catalonia Badalona (Barcelona) Spain Department of Cell Biology Physiology and Immunology Universitat Autònoma de Barcelona (UAB) Bellaterra Spain Experimental and Clinical Cell Therapy Institute (ExCT) Spinal Cord Injury and Tissue Regeneration Center Paracelsus Medical University Salzburg Austria CDL Research University Medical Center Utrecht Utrecht University Utrecht Netherlands Department of Molecular and Comparative Pathology Johns Hopkins School of Medicine Baltimore MD United States Department of Civil Chemical Environmental and Materials Engineering Alma Mater Studiorum University of Bologna Bologna Italy Fischell Department of Bioengineering University of Maryland College Park MD United States Department of Biomedical Engineering University of California Davis CA United States Department of Rheumatology and Inflammation Research Institute of Medicine

Extracellular vesicles (EVs) large-scale production is a crucial point for the translation of EVs from discovery to application of EV-based products. In October 2021, the International Society for Extracellular Vesicles (ISEV), along with support by the FET-OPEN projects, “The Extracellular Vesicle Foundry” (evFOUNDRY) and “Extracellular vesicles from a natural source for tailor-made nanomaterials” (VES4US), organized a workshop entitled “massivEVs” to discuss the potential challenges for translation of EV-based products. This report gives an overview of the topics discussed during “massivEVs”, the most important points raised, and the points of consensus reached after discussion among academia and industry representatives. Overall, the review of the existing EV manufacturing, upscaling challenges and directions for their resolution highlighted in the workshop painted an optimistic future for the expanding EV field. © 2022 The Authors. Journal of Extracellular Biology published by Wiley Periodicals, LLC on behalf of the International Society for Extracellular Vesicles.

关键词： EV-based products extracellular vesicles ISEV workshop large-scale production manufacturing processing regulatory issues

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A flipped classroom approach to teaching transportation engineering 123

A flipped classroom approach to teaching transportation engi...

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123rd ASEE Annual Conference and Exposition

作者： Karabulut-Ilgu, Aliye Yao, Suhan Savolainen, Peter Tarmo Jahren, Charles T. Iowa State University Department of Civil Construction and Environmental Engineering United States Iowa State University Curriculum and Instructional Technology Master Program United States

The flipped classroom approach has gained increasing popularity in higher education, particularly in STEM fields. In flipped learning, part or all of direct instruction is delivered through online videos and other media, and the class time is used for engaging students in collaborative, hands-on activities. In order to utilize the benefits of this novel teaching approach, a junior-level, introduction to transportation engineering course was converted into a flipped format. This study, conducted in a major Midwestern university, will present the results of a mixed-method evaluation investigating the effectiveness of the flipped classroom approach. Quantitative data included a pre-course survey, a post-course survey. Qualitative data, on the other hand, included video recordings of in-class sessions and end-of-semester focus group interviews. Analysis of the results indicated students benefited from the flipped classroom approach although it entailed some challenges for both faculty and students. Conclusions are drawn and recommendations are made for engineering education researchers and practitioners. © American Society for engineering Education, 2016.

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