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Dissertations / Theses on the topic 'Impact speed'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Tanawongsuwan, Rawesak. "Impact of speed variations in gait recognition." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04072004-180217/unrestricted/tanawongsuwan%5Frawesak%5F200312%5Fphd.pdf.

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Bangalore, Krishna-Prasad Lankarani Hamid M. "Protective bollard design for high speed impact energy absorption." Diss., Click here for available full-text of this thesis, 2006. http://library.wichita.edu/digitallibrary/etd/2006/t051.pdf.

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Thesis (M.S.)--Wichita State University, Dept. of Mechanical Engineering.<br>"May 2006." Title from PDF title page (viewed on October 2, 2006). Thesis adviser: Hamid M.Lankarani. Includes bibliographic references (leaves 62-64).

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3

Dear, J. P. "The fluid mechanics of high-speed liquid/solid impact." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354324.

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4

Pilgrim, Michael. "The impact of differential friction on curve negotiation speed." Thesis, University of Canterbury. Engineering, 2014. http://hdl.handle.net/10092/10276.

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This thesis considers the impact of differential skid resistance between wheel paths on the speed at which a vehicle can safely negotiate a curve. Currently the New Zealand Transport Agency undertakes measurement of the co-efficient of friction on the state highway network by measuring both wheel paths, but taking the average value to represent the level of skid resistance available. Part of the basis for this approach is that modern cars have Electronic Stability Control that has historically been considered to negate the effects of any differential friction. Aside from straight line braking

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Amine, Simon. "Equivalent numerical model for honeycomb subjected to high speed impact." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83848.

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Due to their high specific strength and stiffness, honeycomb sandwich structures are used in impact-resistance applications. Their structural efficiency depends to a great extent on the lightweight core separating the face sheets and providing overall high stiffness. Detailed finite element modeling of the penetration of honeycombs by a projectile can be fairly complex, and computationally expensive as shown in the first part of this study. A computationally efficient axisymmetric equivalent numerical homogeneous model for Aluminum 5052-1119 1/8in - 0.001in hexagonal honeycomb subjected

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Fontana, Quentin P. V. "Speed and temperature effects in the energy absorption of axially crushed composite tubes." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/205359.

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Tubes of glass reinforced thermosetting resins have been tested in axial compression between steel platens with one end chamfered to prevent critically high loads causing catastrophic centre failure. By testing in such a manner these tubes crush in a progressive and controlled manner, and are capable of exhibiting high levels of energy absorption, particularly when related to the material mass involved. Polymers are known to display viscoelastic behaviour and polymer composites are similarly sensitive to test speed and temperature. Energy absorption in tube crushing has been shown to be speed

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Davies, Peter Nicholas Hugh. "Multiple impact jet apparatus : equipment and high-speed rain damage studies." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293390.

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8

Gotlib, Ilia. "An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602.

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9

Ponnu, Devanarayanan Balaji. "Impact of Speed Differences between Lanes on the Empirical Fundamental Relationship." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534622048454184.

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10

Khumalo, Siboniso T. "Induction motor variable speed drive performance and impact on energy savings." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/8751.

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Bibliography: p. 132-134.<br>ESKOM, together with Municipalities distribute power at a line-to-line voltage of 400+/-10%. Hence in theory, the user ends up with a voltage of 340 to 440. In urban areas 2% voltage unbalance is considered acceptable, while 3% voltage unbalance is considered acceptable for rural areas. The combined effects of under or overvoltages coupled with "acceptable maximum" voltage unbalance is not understood or documented. This project is a comprehensive study of the effects of voltage unbalance in combination with under or overvoltages on induction machines (1M) variable

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11

Anyang, Ernest Ohene. "The impact of variable speed drives on energy efficient induction motors." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10028.

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Includes abstract.<br>Includes bibliographical references.<br>In an era when the world is faced with diminishing resources and energy security concerns, the slightest energy savings can prove essential in energy conservation. Induction motors and motorised loads consume an estimated 60% of the total energy required in the South African industry. This figure stands at 40% worldwide. Energy Efficient induction motors have proven to be an effective solution in the quest to reduce energy consumption. In South Africa, there have been efforts to replace the standard motors already in operation with

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12

Ross, Lesley Anne. "Does speed of processing training impact driving mobility in older adults? /." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/ross.pdf.

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Thesis (Ph. D.)--University of Alabama at Birmingham, 2007.<br>Title from PDF of title page (viewed Oct. 13, 2009). Additional advisors: Jerri D. Edwards, David L. Roth, David E. Vance, Virginia G. Wadley. Includes bibliographical references (p. 36-44).

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13

Waxman, Rachel. "Effects of geometry and phase on material damage response under high-speed impact." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6078.

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Peridynamics, presented by Silling in 2000 [1], is a reformulation of the elastic theory from differential equations to integral equations, which are more equipped to handle discontinuities, such as crack initiation and propagation. Because of this, peridynamics is an effective tool to address many of the problems relevant to the aerospace and defense industries. For example, airborne sand particles and raindrops cause local damage to aircraft in flight. This damage manifests itself as radial and subsurface lateral cracking, as well as increased surface roughness. All of these damage morpholog

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Rondon, Abraham. "The impact of weather conditions on urban travel speed using ANPR observations." Thesis, KTH, Trafik och logistik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149461.

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Weather conditions may impact traffic flow in different ways. Both the human decisions regarding the trip (route, mode, time) and the trip itself can significantly vary. Driver’s behavior may be affected by weather resulting in, among others, deterioration of the network ’s travel times and speeds. Therefore to study and analyse travel times under different weather conditions, represents an important instrument to support Intelligent Transport Systems (ITS). With the correct knowledge and information, travellers would be able to plan their trips in a cost-efficient way, while traffic manager

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Tesfaye, Adula Ermias. "Impact of parking maneuvers on space mean speed and average travel time." Thesis, KTH, Transportvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-38920.

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Parking maneuver is one among the numerous factors which affect the traffic movement. In this thesis work the impact of parking maneuvers and double parking on the traffic performance of urban street segments is studied. In order to analyze the traffic performance, the impact on the travel time and space mean speed is studied. Two approaches are used for the study; the Micro analysis and Macro analysis. In the Micro analysis the study is not time bounded. The impact of individual vehicles is studied against the event of interest. These events include inbound parking maneuvers, outbound parking

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Olufowobi, Oluwaseun Temitope. "The Safety Impact of Raising Speed Limit on Rural Freeways In Ohio." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1597014805133206.

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Kato, Takuya S. M. Massachusetts Institute of Technology. "Impact of Japanese high-speed rail extension on aviation : a case study." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123234.

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Thesis: S.M. in Transportation, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 109-111).<br>Since the 1964 introduction of high-speed rail in Japan, intercity transportation has largely been provided by high-speed rail and aviation. As new lines have been added to the high-speed rail network-further enhancing convenience and shortening travel times- more and more passengers prefer it. On the other hand, aviation has also increased in importance with the increas

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18

Raddatz, M., and H. J. Schönfeldt. "Ejection and impact angles of saltating particles measured with a high-speed camera." Universität Leipzig, 2010. https://ul.qucosa.de/id/qucosa%3A16374.

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3D and 2D trajectory data of sand grains saltating over a bed are presented from highspeed camera measurements. They were obtained at Zingst peninsula and in laboratory using a wind tunnel. Trajectories, calculated with a Runge-Kutta procedure, using values of the mean wind profile and the air flow were fitted to the measured ones. The trajectory with the lowest RMSE against the measured one was used to estimate the grain diameter of the saltating grain. Also ejection and impact angle, ejection and impact speed of the grain were determined. The results confirm earlier findings that ejection a

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Ouedraogo, Nayabtigungu Hendrix. "The Safety Impact of Raising Trucks' Speed Limit on Rural Freeways in Ohio." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1576248242725121.

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20

Rosser, Benjamin Albert. "The impact of thought speed and variability on psychological state and threat perception." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/15318.

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The speed and variability of thought are purportedly common features of specific psychological states, such as anxiety and mania. The present study explored the proposed independent and combinational influence of these variables upon condition-specific symptoms and affective state. A general population sample was recruited online (N = 263). Participants completed a thought speed and variability manipulation task, inducing a combination of fast/slow and varied/repetitive thought. Change in anxiety and mania symptoms was assessed through direct self-reported symptom levels and indirect, processi

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21

DESHPANDE, NIRANJAN V. "DISPERSANT EFFECTIVENESS ON OIL SPILLS: IMPACT OF ENVIRONMENTAL FACTORS." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1178046001.

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22

Hendricks, Lorin James. "High-Speed Apparatus and Signal Processing for Accoustic Delamination Detection on Concrete Bridge Decks." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8971.

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Maintenance and repair of deteriorating civil infrastructure are global problems requiring significant attention and resources. Accurate measurements of civil infrastructure enable lower repair and rehabilitation costs if mitigation techniques are deployed at earlier stages of deterioration. This research describes an infrastructure inspection solution to scan concrete bridge decks for internal cracking at high speeds. Internal cracking within bridge decks, known as delamination, is a particularly difficult defect to identify because it is often not detectable through visual inspection. Stat

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Bosquet, Vincent. "Speed : système de prοductiοn d'éléments exοtiques déficients en neutrοns". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC212.

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L'installation GANIL/SPIRAL1 produit des faisceaux d'ions radioactifs avec la méthode ISOL. Ce travail de thèse se concentre sur le développement et l'amélioration de plusieurs ECSs (Ensemble Cible Source), dans le but d'augmenter la variété et l'intensité des faisceaux d’ions radioactifs disponibles. La première partie de ce mémoire présente les améliorations apportées à l’ECS FEBIAD, qui présentait des problèmes d'efficacité d'ionisation et de fiabilité. À l’aide d’une série de tests expérimentaux, la source du problème a été identifiée et résolue, ce qui a permis d'obtenir une efficacité d'

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Kingston, Kent J. "The Impact of High-Speed Internet Connectivity at Home on Eighth-Grade Student Achievement." Thesis, University of Nebraska at Omaha, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3558271.

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<p> In the fall of 2008 Westside Community Schools – District 66, in Omaha, Nebraska implemented a one-to-one notebook computer take home model for all eighth-grade students. The purpose of this study was to determine the effect of a required yearlong one-to-one notebook computer program supported by high-speed Internet connectivity at school on (a) English, (b) math, (c) reading, (d) science, and (e) composite score norm-referenced EXPLORE achievement test scores, District's Criterion-Referenced Descriptive Writing Assessment scores, and classroom performance grade point average (GPA) s

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Goel, Ashish. "Dynamic loading of structures by high speed granular media." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277444.

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This thesis analyses the impact of granular aggregates with structures using experiments and numerical simulations. Original contributions include an insight into multiple factors affecting the loading and damage to the structures, along with study of numerical parameters important for realistic prediction of the interaction between the granular media and structures. It extends the current understanding related to such interactions, with an underlying motivation to guide strategies in order to reduce the structural damage. The response of structures impacted by granular media (sand or soil) is

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Lnu, Abhishek. "The Impact of Climate Change on Air Quality for Midwest USA." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1291144247.

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27

Ding, Yonglian. "Quantifying the Impact of Traffic-Related and Driver-Related Factors on Vehicle Fuel Consumption and Emissions." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33350.

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The transportation sector is the dominant source of U.S. fuel consumption and emissions. Specifically, highway travel accounts for nearly 75 percent of total transportation energy use and slightly more than 33 percent of national emissions of EPA's six Criteria pollutants. Enactment of the Clean Air Act Amendment of 1990 (CAAA) and the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) have changed the ways that most states and local governments deal with transportation problems. Transportation planning is geared to improve air quality as well as mobility. It is required that eac

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Burgos, Daniel, Eric Wong, and Kurt Weibel. "Impact of Automated Dispensing Technology on Medication Safety and Costs at an Inpatient Pharmacy." The University of Arizona, 2014. http://hdl.handle.net/10150/614205.

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Class of 2014 Abstract<br>Specific Aims: To compare two groups of automated dispensing technology and their impact on medication safety and costs at an inpatient pharmacy. Methods: A total of 784 medications were audited for Pyxis refill errors, 352 prior to and 432 post implementation of Boxpicker and the ATP High Speed Tablet Packager. Data were collected by obtaining refill reports for automated dispensing. Every other medication on the refill report was a

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Robb, Jennifer. "Study of impact stress in physical models and human vocal folds from high-speed video." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104494.

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It is generally believed that voice overuse and abuse may eventually lead to a number of voice disorders. The link between mechanical stresses in vocal fold tissue and vocal fold damage, however, has not yet clearly been established. One key factor is often hypothesized to be the contact pressure associated with impact between the vocal folds during voicing. Studies of the contact pressure on the medial surface of the vocal folds are scarce. The objective of the present study was to estimate contact pressure in human subjects using high-speed videoendoscopy. The edge velocity of the vocal

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30

Botros, Barbara Brenda. "Impact of unsteady flow processes on the performance of a high speed axial flow compressor." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44880.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references (leaves 66-67).<br>This thesis examines the unsteady interactions between blade rows in a high Mach number, highly-loaded compressor stage. Two straight vane/rotor configurations with different axial spacing between vane and rotor are considered. The numerical simulations of the two configurations are used to determine the effect of axial blade row spacing on the level of entropy generation and the flow mechanisms that affect stage performance. The rotor shock wav

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Leong, Jeffrey. "Development of a limit state design methodology for railway track." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16565/1/Jeffrey_Leong_Thesis.pdf.

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The research presented in this thesis is aimed at developing a limit state design methodology for railway track for recommendation to Standards Australia's next revision of the 'Permanent way materials: prestressed concrete sleepers' code (AS1085.14, 2003). There is widespread suspicion that the railway track, particularly concrete sleepers, have untapped reserves of strength that has potential engineering and economic advantages for track owners. Through quantifying the effects of train speed, wheel impact loadings and distribution of vehicle loads, track engineers would be able to design

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Leong, Jeffrey. "Development of a limit state design methodology for railway track." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16565/.

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The research presented in this thesis is aimed at developing a limit state design methodology for railway track for recommendation to Standards Australia's next revision of the 'Permanent way materials: prestressed concrete sleepers' code (AS1085.14, 2003). There is widespread suspicion that the railway track, particularly concrete sleepers, have untapped reserves of strength that has potential engineering and economic advantages for track owners. Through quantifying the effects of train speed, wheel impact loadings and distribution of vehicle loads, track engineers would be able to design

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33

Nastic, Aleksandra. "Cold Gas Dynamic Spray Impact: Metallic Bonding Pre-Requisites and Experimental Particle In-Flight Temperature Measurements." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42086.

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The impact phenomena of high velocity micron-size particles, although commonly considered and described as detrimental in numerous engineering applications, can be used in a beneficial way if properly understood and controlled. The Cold Gas Dynamic Spray (CGDS) process, known as a surface modification, repair and additive manufacturing process, relies on such high velocity impacts. In the process, solid particles are accelerated by a supersonic gas flow to velocities up to 1200 m/s and are simultaneously heated to temperatures lower than their melting point. When propelled under proper velocit

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Kownatzki, Maximilian. "The speed of strategic decision-making and the impact of corporate involvement at the SBU-level." [S.l.] : [s.n.], 2002. http://aleph.unisg.ch/hsgscan/hm00064048.pdf.

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35

Sánchez, Borràs Marta. "Impact of rail infrastructure charging systems implemented in europe on the competitiveness of high speed services." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/30725.

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European railways have been immersed since the nineties in a restructuring process aimed at improving the effectiveness, quality and economic efficiency of the provision of railway services, as well as stimulating the growth of railway markets. This reform has involved a separation between infrastructure management and operation and the introduction of rail infrastructure charges to regulate the use, by railway undertakings, of the infrastructure managed by infrastructure managers. Rail infrastructure charges aim, in essence, at recovering costs. Nevertheless, they can have an influence on th

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Sánchez, Borràs Marta. "Impact of rail infrastructure charging systems implemented in Europe in the competitiveness of high speed services." Hamburg Eurail Press, 2009. http://d-nb.info/1002079888/04.

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37

Saxman, Tim. "The impact on fuel costs when optimizing speed and weight in a single truck transportation system." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63970.

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Traditionally, route planning in the transportation sector has only focused on minimizing the total distance driven when transporting goods or people. This is often done using software tools since planning the optimal route is a complex task that is hard to solve by hand. While driving the shortest distance possible is an effort towards lowering fuel costs, which is one of the largest operating costs for truck transportation companies, it is not necessarily the most fuel efficient route. Recently, research has emerged regarding fuel minimizing route planning in order to perform transport opera

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Canessi, Tomà. "Physical modelling of rock fragmentation upon impact." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Rockfall represents a significant safety hazard in building, civil and mining environment that can cause serious injuries and fatalities and can damage structures, infrastructure and machinery. It is extremely costly to manage and public authorities need reliable tools to study and design protection structures as the performance of the existing structures are variable. Many studies and experiments have been done, but one aspect would lead to a better comprehension of the subject: the fragmentation of blocks upon impact. Rocks commonly break up upon impact but rockfall prediction models current

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Zbasnik, Nathaniel. "The Impact of Invasive Lionfish on the Feeding Performance of Endemic Spotted Scorpionfish." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2333.

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Invasive species, such as the red lionfish, Pterois volitans, are damaging many ecosystems around the world by out-competing native species. However, little work has been done to determine if P. volitans have a direct influence on the feeding performance of native species with which they compete. This study examines the feeding performance in terms of suction pressure, kinematic timing, and excursion distances of spotted scorpionfish, Scorpaena plumieri. Through multiple trials it was examined how S. plumieri modulate their kinematic behavior in response to P. volitans and a conspecific. The c

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Srinivasan, Shekhar. "A Simulation Perspective on Dimensional Control and Formability in Impact Forming." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275004865.

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Zhang, Lihe. "Impact resistance of high strength fiber reinforced concrete." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/705.

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Concrete structures may be subjected to dynamic loading during their service life. Understanding the dynamic properties of concrete structures is becoming critical because of the increased concern about the dynamic loading of both civilian and military structures, and especially, the recent increase in terrorist attacks on structures. Fiber reinforced concrete (FRC) is known to exhibit superior performance in its post-peak energy absorption capacity, (i.e., toughness) under flexural and tensile loading. However, the behavior of fiber reinforced concrete under compressive impact has not previo

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Lin, Hao Yeh, and 林浩業. "Impact to Ground by High Speed Train." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/90905496125075048040.

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碩士<br>國立臺灣大學<br>工程科學與海洋工程學系<br>91<br>ABSTRACT Due to the geographical features of Taiwan, the location of Science Parks in Taiwan can not keep the enough distance away from the planned route of high-speed rail. Therefore some vibration sensitive semiconductor factories in South Science Park and Hsinchu Science Park have the distance less than 500m away from the high-speed rail. The micro vibration problem induced by a high-speed train becomes an important issue. In this thesis, the ground vibration induced by high-speed rail is concentrated on the thin soil area located i

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Bangalore, Krishna-Prasad. "Protective bollard design for high speed impact energy absorption." Thesis, 2006. http://hdl.handle.net/10057/270.

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As is passenger safety of paramount importance to the manufacturer of passenger vehicles, so is the security of the nation to its government. Recent developments in the usage of heavy vehicles by militant outfits to carry out attack has become the main concern of many governments around the world, hence the existence of some kind of barrier to stop heavy vehicles from entering restricted areas was thought of. This barrier must be able to provide both visibility and security without being much expensive. Existence of a concrete wall will undoubtedly provide security but at the same time visibil

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Lin, Chia-Ching, and 林家慶. "Impact to Rail and Bridge by High Speed Train." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/89531094911995779062.

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Hsu, Lin-Ching, and 許琳青. "Impact Responses of Bridges Traveled by High Speed Trains." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/45419939529074959411.

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Xu, Lin-Qing, and 許琳青. "Impact Responses of Bridges Traveled by High Speed Trains." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/10684339263056790274.

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Fen-Lin, Ching, and 林清芬. "A Study on the Traffic Safety Impact Evaluation of the Speed Reducing Devices-As the Speed Hump." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/waa9x3.

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碩士<br>中央警察大學<br>交通管理研究所<br>88<br>The gradually increasing traffic flow and high vehicle speed have already made a deeply concerned and opposed from the residential district residents in many communities, campus and factory roads with low traffic flow. Although the traffic flow is within the residential district's road standard, the speeding vehicles have threatened the residential district residents' life and property safety. In order to protect the pedestrian, motorcycle rider, biker and keep the road traffic calming and safety, there is a lot of speed hump with a camel's hump, which were set

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Huang, Yu-Hsin, and 黃榆心. "The Impact of High-speed Rail on Urban Land Teleconnection：The Empirical Study of Taiwan High-speed Rail." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5dz86d.

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Donaher, Garrett. "Impact of Winter Road Conditions on Highway Speed and Volume." Thesis, 2014. http://hdl.handle.net/10012/8241.

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Several past studies have attempted to quantify the impact of winter weather conditions on highway mobility in terms of traffic volume, speed, and capacity. While consistent in their general findings, these studies have shown considerably different results in terms of effect size and contributing factors. More importantly, most of these studies have not attempted to model the effects of winter maintenance operations on mobility or isolate these effects from those due to snowstorm characteristics, rendering their results and the proposed methods of limited use for estimating the benefits of mai

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Tsao, Da-Fa, and 曹大發. "Numerical Simulation of High Speed Impact on a Sandwich Panel." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/03726846720132151538.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>98<br>Large strains often cause material destructions in industry and applications. In numerical simulations, we have to set up material models suitable for computation problems. This thesis simulated bullet penetration problems by LS-DYNA software with Elastic Plastic Hydro Spall Material Model, Johnson Cook Material Model for metals, Johnson Holmquist Concrete Material Model for concrete, and Johnson Holmquist Ceramics Material Model for ceramic. Concrete is more complicated than the other materials in penetration simulations due to its inhomogeneous compositio

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