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17th IEEE International Conference on Industrial Informatics, INDIN 2019

作者： Takahashi, Akira Yokota, Sho Matumoto, Akihiro Chugo, Daisuke Hashimoto, Hiroshi Toyo University Dept. of Mechanical Engineering Kawagoe Saitama Japan Kansei Gakuin University School of Science and Technology Sanda Japan Advanced Institute of Industrial Tech. Master Program of Innovation for Design and Engineering Tokyo Japan

ISBN: (纸本)9781728129273

The purpose of this research is to develop the wheelchair system for hemiplegic users. The proposed system is configured by the front wheel with active steering and hand rim for detecting user's driving force. The user's operational intention is distinguished by the sign and amplitude of force along the rotational axis of the hand rim. The steering angle of the front wheel is controlled by an actuator based on extracted intention from the hand rim. By proposed system, user can operate the wheelchair by using only single side hand rim. In particular, in this paper, we evaluate the designed hand rim by conducting some experiments. © 2019 IEEE.

关键词： Wheelchairs

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Atomic Resolution Secondary Electron Imaging of Top and Bottom Surfaces

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Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Plotkin-Swing, B Martis, J Su, C Hotz, M T Dellby, N Radlička, T Krivanek, O L Lovejoy, T C Bruker AXS (formerly Nion R&D) Kirkland WA USA Dept. of Mechanical Engineering and Materials Science Yale University New Haven CT USA Institute of Scientific Instruments of Czech Academy of Sciences Brno Czech Republic Department of Physics Arizona State U. Tempe AZ USA

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Non-thermal plasma inactivation of porcine reproductive and respiratory syndrome (PRRS) virus in HOG barn ventilation air 112

Non-thermal plasma inactivation of porcine reproductive and ...

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A and WMA''s 112th Annual Conference and Exhibition, ACE 2019

作者： Clack, Herek L. Xia, Tian Lin, Zijie Lee, Eric M. Melotti, Kevin Rohde, Mitchell Rozeboom, Dale Dept. of Civil and Environmental Engineering University of Michigan Ann ArborMI United States Dept. of Mechanical Materials and Aerospace Engineering Illinois Institute of Technology ChicagoIL United States Quantum Signal Corp. SalineMI United States Dept. of Animal Science Michigan State University East LansingMI United States

Porcine reproductive and respiratory syndrome (PRRS) costs the pork industry more than USD600M per year. Infectious PRRS virus has been found in air more than 4 km from infected pigs and installation of HEPA filters in ventilation systems supplying fresh air to swine has been found to be expensive in both capital and operating costs. We have previously demonstrated under laboratory conditions nearly instantaneous inactivation of airborne MS2 phage and PRRSv with a lab-scale non-thermal plasma (NTP) reactor. The present study reports the effectiveness of a larger prototype NTP device field tested at a Michigan hog farm. The prototype NTP reactor was custom designed and built to be durable and portable, offering self-contained and semi-continuous flow rate, power, temperature, and relative humidity measurements for treated air flow rates exceeding 150 standard cubic feet per minute (scfm). The field test site was a hog farm in Michigan recently experiencing recurring outbreaks of PRRSv among the swine, housed in assorted fully enclosed barns operated in the wintertime at minimal rates of fresh air ventilation to retain heat within the structures. Bioaerosol samples from the exhausted ventilation air were collected using two methods: collection in both liquid impingers and on water-soluble PM filters. Under these conditions, the presence of high concentrations of reducing gases (NH3, H2S) have the potential to scavenge the oxidants produced by the NTP (OH-, O*) that are responsible for inactivating the PRRS virus, but may also inhibit the formation of unwanted ozone (O3) as a byproduct in the treated air. © 2019 Air and Waste Management Association. All rights reserved.

关键词： Viruses

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An Application for the Geometrical Based Optimization for a Common Tool Design in Cold Forging Process

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materials Today: Proceedings 2019年 17卷 1702-1710页

作者： Nara Nakeenopakun Yingyot Aue-u-lan Materials and Production Engineering program Dept. of Mechanical and Process Engineering The Sirindhon International Thai-German School of Engineering (TGGS) King Monkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand

Nowadays, the production time is a key to minimize the process sequence which leads to lower the whole product cost. One of the leadtimes is the installation of the forming dies to the press. There are many methodologies having been developed to solve this problem, such as a Single Minute Exchange Die System (SMED) which could minimize the setting up die to almost 25-30 percent. However, this system would not consider the minimization of the forming process or sequence. Most of the automotive industries would lighten this problem by centralizing common parts which could be utilized with the same component dimension. This part could be used in different car models. However, this technique could only reduce the time in development of the forming processes/dies, but the number of the forming dies is still remain unchanged. Therefore, in this research the geometrical based methodology integrated with Finite Element Modeling would be proposed to develop generalized common dies which could be used with the same part configurations/shapes but difference in dimensions at some areas. This technique is applied and validated with different pulley models. The results show that almost 60 percent of the forming dies would be reduced by this technique.

关键词： Metal forming Forging process Geometrical based optimization Finite element modeling

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Unavoidable disorder and entropy in multi-component systems

arXiv

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arXiv 2019年

作者： Toher, Cormac Oses, Corey Hicks, David Curtarolo, Stefano Dept. Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States

The need for improved functionalities is driving the search for more complicated multi-component materials. Despite the factorially increasing composition space, ordered compounds with 4 or more species are rare. Here, we unveil the competition between the gain in enthalpy and entropy with increasing number of species by statistical analysis of the AFLOW data repositories. A threshold in the number of species is found where entropy gain exceeds enthalpy gain. Beyond that, enthalpy can be neglected, and disorder - complete or partial - is unavoidable. Copyright © 2019, The Authors. All rights reserved.

关键词： Enthalpy

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On the contribution of solar energy to sustainable developments goals: Case study on Mohammed bin Rashid Al Maktoum Solar Park

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International Journal of Thermofluids 2021年 12卷

作者： Obaideen, Khaled Nooman AlMallahi, Maryam Alami, Abdul Hai Ramadan, Mohamad Abdelkareem, Mohammad Ali Shehata, Nabila Olabi, A.G. Faculty of Engineering and Built Environment SEGi University 47810 Petaling Jaya Selangor Malaysia Dept. of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box Sharjah27272 United Arab Emirates Sustainable Energy & Power Systems Research Centre RISE University of Sharjah P.O. Box Sharjah27272 United Arab Emirates Center for Advanced Materials Research University of Sharjah P.O. Box Sharjah27272 United Arab Emirates International University of Beirut PO Box Beirut146404 Lebanon Lebanese International University Beirut Lebanon Chemical Engineering Department Minia University Elminia Egypt Environmental Science and Industrial Development Department Faculty of Postgraduate Studies for Advanced Sciences Beni-Suef University Egypt Mechanical Engineering and Design Aston University School of Engineering and Applied Science Aston Triangle BirminghamB4 7ET United Kingdom

With the fast growth of the global economy, energy supply and demand have a strong impact on social, economic, and environmental aspects. As a consequence, this has pushed the decision-makers to formulate objectives, guiding economic policies toward sustainable goals. The process is known as Sustainable Development Goals (SDGs) that have been proposed by the United Nations. This being said, the energy sector is a vital domain with a vast potential for improvments in terms of technologies and ligistalations. Solar energy is among the most efficient solutions proposed to reduce the economic and environmental footprints of energy. In this frame, the current paper aims to localize solar energy within SDGs and analyze the contribution of the solar energy towards the achievement of the SDGs. Moreover, the current work highlights the contributions of Mohammed bin Rashid Al Maktoum (MBR) Solar Park in the United Arab Emirates to achieving the SDGs. Indeed, the MBR Solar Park concept offers valuable insights of environmental impacts by deploying clean and affordable energy sources in place of conventional fossil fuel power plants that are still heavily used in the region. The MBR Solar Park operation has already mitigated 6.5 million tonnes of carbon dioxide equivalent and this number will likely rise when all phases are installed and operational. Moreover, it has been shown that MBR Solar Park achieve several SDGs such SDG 8: decent work and economic growth, SDG 9: industry, innovation and infrastructure, SDG 11: sustainable cities and communities, and SDG 15: life on land. © 2021 The Authors

关键词： Sustainable development

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Comparison of head impact frequency and magnitude for midget and junior ice hockey players to inform safety and policy 6

Comparison of head impact frequency and magnitude for midget...

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6th Symposium on Safety in Ice Hockey

作者： McMunn, Leah E. Hoshizaki, Thomas B. Robidoux, Michael Gilchrist, Michael D. Karton, Clara Post, Andrew Dept. of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie-Curie Private OttawaONK1N9A4 Canada School of Human Kinetics Neurotrauma Impact Science Laboratory University of Ottawa A106-200 Lees Ave. OttawaONK1N6N5 Canada School of Mechanical and Materials Engineering University College Dublin Stillorgan Rd. Belfield Dublin 4 Ireland

ISBN: (纸本)9780803176966

Hockey Canada reports Junior hockey players have a greater incidence of mild traumatic brain injury when compared to Midget hockey players. Very little research has been undertaken to understand the differences in impact events, frequency, and magnitude that contribute to these differences in brain injury incidence. Videos of 20 Midget and Junior ice hockey games were analyzed to determine the frequency and magnitude of head impact events. Physical reconstructions of the head impact events were conducted using a Hybrid III headform to obtain the linear and rotational acceleration characteristics. Linear and rotational acceleration data were used for finite element modeling to calculate the peak maximum principal strain within the cerebrum. The results demonstrated that while Midget and Junior ice hockey players had similar head impact frequencies during play (p = 0.0912), Junior players experienced a greater number of total impacts to the head after the whistle (p = 0.0079). When the impacts during play were broken down by event type, punches to the head (p = 0.0192) and shoulders to the head (p = 0.0290) were found to be more frequent at the Junior level. The collected data identified similar magnitudes of head impact but differences in the frequency between Midget and Junior hockey. Enforcing existing rules and forming additional policy and regulations surrounding protective measures for athletes to manage shoulder and punch impacts to the head, both during play and after the whistle, may decrease the player's risk of brain trauma in the sport. © 2020 ASTM International.

关键词： Sports

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Using Microscopy and Image Analysis to Show Density and Property Variations in Additive Manufactured Ti-6Al-4V

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Microscopy and Microanalysis 2019年第S2期25卷 2590-2591页

作者： Erica Stevens Samantha Schloder Eric Bono David Schmidt Markus Chmielus Dept. of Mechanical Engineering and Materials Science Univ. of Pittsburgh Pittsburgh PA USA Carpenter Technology Corporation Philadelphia PA USA

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A New Approach to Teaching Statics Using a Makerspace

A New Approach to Teaching Statics Using a Makerspace

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Frontiers in Education (FIE) Conference

作者： Lee A. Dosse Matthew M. Barry Karthika Ramanathan Renee M. Clark Dept. of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh PA Dept. of Industrial Engineering University of Pittsburgh Pittsburgh PA Engineering Education Research Center University of Pittsburgh Pittsburgh PA

ISBN: (数字)9781728117461

ISBN: (纸本)9781728117478

This Work In Progress (WIP), Research to Practice Category paper, addresses a new approach to teaching concepts within introductory statics for undergraduate engineering students using a low-resolution-preto/prototyping makerspace. As the benefits of physical modeling and communities of practice have been increasingly documented, makerspaces have sprung up across numerous college and university campuses. Although makerspaces vary between institutions, they generally have resources that provide users the opportunity to perform hands-on design and obtain build experience. These facilities also bring people of different disciplines together, encouraging the sharing of perspectives and fostering collaboration among users. Literature pertaining to makerspaces shows that enhanced learning occurs within students who utilize these spaces. The new approach was pilot tested in the fall 2018 semester. In this math and physics-intensive sophomore-level course, the instructional goals in utilizing the makerspace included an enhanced understanding of the physical significance and application of core course concepts. The main course concept demonstrated was planar truss design, as pursued through the physical construction and testing of balsa wood bridges. Students were asked to design, build, and test a bridge prototype in a hands-on fashion using the makerspace. A second section of the course taught by the same instructor did not utilize the makerspace to build and test a prototype; instead, the students designed and analyzed a bridge prototype using 3D modeling and finite element analysis software, enabling a comparison. An assessment plan was developed that included the gathering of both student-perspectives, as well as direct performance data, including students' performance on the bridge prototyping project. Via survey, students were asked, prior to and after completing the bridge project, their perspectives about the makerspace, and if the makerspace enhanced their understa

关键词： Bridges Education Prototypes Encoding Testing Creativity Technological innovation

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Flexible oxide thin-film transistor with high process temperature by means of peel-off and transfer method 25

Flexible oxide thin-film transistor with high process temper...

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25th International Display Workshops, IDW 2018

作者： Ko, Jong Beom Lee, Seung-Hee Lee, Tae-Lk Kim, Taek-Soo Kim, Hyeok Ko Park, Sang-Hee Dept. of Materials Science and Engineering KAIST Korea Republic of Dept. of Mechanical Engineering KAIST Korea Republic of DAVO C and M Korea Republic of

ISBN: (纸本)9781510883918

For the flexible transparent display driving device, we realize the flexible oxide TFT with high process temperature up to 300°C by using inorganic exfoliation layer. The low adhesive energy between oxide TFT and exfoliation layer was measured, and the device shows reasonable electrical characteristics. © 2018 by Society for Information Display. All rights reserved.

关键词： Thin film transistors

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