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Relevant bibliographies by topics / Impact speed

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Academic literature on the topic 'Impact speed'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 June 2025

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Journal articles on the topic "Impact speed"

1

Steel, Duncan. "Asteroid and Comet Impact Speeds upon Mars: Significance for Panspermia and the Supply of Organics." International Astronomical Union Colloquium 161 (January 1997): 197–201. http://dx.doi.org/10.1017/s0252921100014718.

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AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.

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Vertlberg, Juraj, Marijan Jakovljević, Marko Ševrović, and Kamer Shabanaj. "Speed Display Radars’ Impact on Speed Reduction on District Roads at Settlement Entrances." Sustainability 15, no. 4 (2023): 3099. http://dx.doi.org/10.3390/su15043099.

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Speed is one of the main causes of severe traffic accidents, especially of those involving vulnerable road users. Speed display radars are one of the engineering solutions that aim to reduce the speed of traffic flow at locations where it is crucial. A before and after study was conducted at six locations on district roads in the Republic of Croatia. As part of the research, vehicles’ speeds were measured for two weeks, during which the devices’ displays were switched off for one week and switched on for another, however, the devices’ radars recorded and collected the speeds of all vehicles which passed during the research period. The research collected a total of 182,352 speeds of recorded vehicles. The test was performed to determine the effect of speed display radar on the potential vehicles’ speed reduction. The results did not show a statistically significant difference in average hourly speeds at most locations, however, they showed a statistically significant difference in 85th percentile hourly speeds of approximately 1 to 3 km/h. Therefore, it can be concluded that the speed display radars at the locations had a positive effect on reducing the vehicles’ speeds. Additionally, at some locations a decrease in the number of speed limit violators was found which proved to be a statistically significant difference between the share of speed limit violators in total traffic flow.

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Sanada, Toshiyuki, Keita Ando, and Tim Colonius. "Effects of Target Compliance on a High-Speed Droplet Impact." Solid State Phenomena 187 (April 2012): 137–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.187.137.

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High speed spray cleaning which utilize droplets impact has been used for removing contaminants from wafer surface. When a droplet impacts a solid surface at high speed, the contact periphery expands very quickly and liquid compressibility plays an important role in the initial dynamics and the formation of lateral jets. Impact results in high pressures that can clean or damage the surface. In this study, we numerically investigated a high speed droplet impacts on a solid wall. In order to compare the available theory and experiments, 1D, 2D and axisymmetric solutions are obtained. The generated pressures, shock speeds, and the lateral jetting mechanism are investigated; especially the effect of target compliance is focused.

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S., T. DJABBAROV. "CONSIDERATION OF AERODYNAMIC IMPACT IN SETTING THE MAXIMUM PERMISSIBLE SPEEDS OF HIGH-SPEED TRAIN." Science and Transport Progress, no. 5(71) (October 27, 2017): 61–70. https://doi.org/10.15802/stp2017/113192.

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<strong>Purpose.</strong> Studies of the effect of aerodynamic pressure on the maximum permissible speeds of a high-speed train on the existing railway infrastructure. <strong>Methodology.</strong> The study of the magnitude and direction of the aerodynamic pressure, its effect on the maximum speeds of a high-speed train was carried out on a train model composed of axisymmetric bodies with conical forms of head and tail parts. <strong>Findings.</strong> Determined the values of the aerodynamic pressure at different distances from the train are, when the high-speed train moves at a speed of 200 km/h or more. The maximum speeds of a high-speed train are determined taking into account the state of the infrastructure of the existing railway, ensuring the safe operation of a high-speed railway. O<strong>riginality.</strong> Theoretical studies of aerodynamic pressure from secondary air currents formed during the movement of high-speed trains are performed on a model of a train composed of identical axisymmetric bodies with conical forms of head and tail moving in a compressible medium. The results of the research allow the regularity of the change in aerodynamic pressure during the movement of a high-speed train. <strong>Practical value.</strong> The obtained results allow to establish: 1) the maximum permissible speeds of a high-speed train taking into account the technical condition of permanent devices and structures of the existing railway infrastructure; 2) technical parameters of individual objects and structural elements of the infrastructure of high-speed iron subjected to the effect of aerodynamic pressure for a given maximum speed of high-speed trains.

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Croft, Arthur C. "Low Speed Rear Impact Collisions:." Journal of Musculoskeletal Pain 4, no. 4 (1996): 39–46. http://dx.doi.org/10.1300/j094v04n04_05.

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Zhang, Long, Jia Dong Huang, Xian Xin Xu, and Xiong Pan. "Impact of Wind Speed Correlation on Transient Stability of Power System." Applied Mechanics and Materials 448-453 (October 2013): 2301–4. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2301.

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Wind speeds of different wind turbines in a big wind farm always have correlations because of their close geographical location. This paper builds wind speed model by t-copula function and uses rank correlation matrix to measure the correlation of wind speeds. The case study of IEEE-39 bus system and Yunnan Power Grid shows that wind speed correlation has certain effect on the transient stability of power system.Taking wind speed correlation into consideration makes the analysis of systems transient stability more close to reality.

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Ding, Yu, Zhuoying Tan, Shuguang Li, Runke Huo, Ziliang Liu, and Yong Ma. "Research on Tunnel Surrounding Rock Failure and Energy Dissipation Based on Cyclic Impact and Shear Loading." Advances in Civil Engineering 2021 (June 22, 2021): 1–15. http://dx.doi.org/10.1155/2021/8838695.

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Aiming at the cyclic impact deformation and failure of tunnel surrounding rock under shear stress, a self-developed rotation-impact simulation test platform was used to determine the number of failures, stress-strain curves, and energy in the process of cyclic impact failure. The failure process of rock under different impact velocities and shear stresses has been systematically studied. Results show that, under the same impact speed, the shear stress will increase with the increase in the rotation speed, but an upper limit will exist. When the rotation speed reaches this upper limit, the shear stress will no longer increase. The presence of shear stress will reduce the number of impacts required for rock failure. When the impact speed is 7.2 m/s, the number of impacts at the maximum rotation speed is 60% of the static state. When the impact velocity is 16.8 m/s, this value is only 33.3%. At the same impact velocity, the stress-strain curves under different rotation speeds do not change significantly, but with the increase in the rotation speed, the slope of the elastic stage of the stress-strain curve gradually decreases, and the corresponding stress of the rock sample decreases when the maximum strain is reached. With the increase in shear stress, the crushing specific energy required for rock failure gradually decreases. The greater the impact velocity, the more obvious the impact of shear stress on energy dissipation. In the tunnel process, when the surrounding rock is subjected to impact loads from different directions, only the axial strain analysis will have certain safety hazards, and timely support and reinforcement work are required.

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Xiao, Sen, Fuhao Mo, Jikuang Yang, Jing Huang, Zhi Xiao, and Jeff R. Crandall. "THE INFLUENCE OF IMPACT SPEED ON CHEST INJURY OUTCOME IN WHOLE BODY FRONTAL SLED IMPACTS." Transport 35, no. 6 (2021): 669–78. http://dx.doi.org/10.3846/transport.2020.14280.

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While the seatbelt restraint has significantly improved occupant safety, the protection efficiency still needs further enhance to reduce the consequence of the crash. Influence of seatbelt restraint loading on chest injury under 40 km/h has been tested and documented. However, a comprehensive profiling of the efficiency of restraint systems with various impact speeds has not yet been sufficiently reported. The purpose of this study is to analyse the effect of the seatbelt loadings on chest injuries at different impact speeds utilizing a high bio-fidelity human body Finite Element (FE) model. Based on the whole-body frontal sled test configuration, the current simulation is setup using a substitute of Post-Mortem Human Subjects (PMHS). Chest injury outcomes from simulations are analysed in terms of design variables, such as seatbelt position parameters and collision speed in a full factorial experimental design. These outcomes are specifically referred to strain-based injury probabilities and four-point chest deflections caused by the change of the parameters. The results indicate that impact speed does influence chest injury outcome. The ribcage injury risk for more than 3 fractured ribs will increase from around 40 to nearly 100% when the impact speed change from 20 to 40 km/h if the seatbelt positioned at the middle-sternum of this study. Great injuries to the chest are mainly caused by the change of inertia, which indicates that chest injuries are greatly affected by the impact speed. Furthermore, the rib fracture risk and chest deflection are nonlinearly correlated with the change of the seatbelt position parameters. The study approach can serve as a reference for seatbelt virtual design. Meanwhile, it also provides basis for the research of chest injury mechanism.

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Elhenawy, Mohammed, Hesham A. Rakha, and Huthaifa I. Ashqar. "Joint Impact of Rain and Incidents on Traffic Stream Speeds." Journal of Advanced Transportation 2021 (January 11, 2021): 1–12. http://dx.doi.org/10.1155/2021/8812740.

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Unpredictable and heterogeneous weather conditions and road incidents are common factors that impact highway traffic speeds. A better understanding of the interplay of different factors that affect roadway traffic speeds is essential for policymakers to mitigate congestion and improve road safety. This study investigates the effect of precipitation and incidents on the speed of traffic in the eastbound direction of I-64 in Virginia. To the best of our knowledge, this is the first study that studies the relationship between precipitation and incidents as factors that would have a combined effect on traffic stream speeds. Furthermore, using a mixture model of two linear regressions, we were able to model the two different regimes that the traffic speed could be classified into, namely, free-flow and congested. Using INRIX traffic data from 2013 through 2016 along a 25.6-mi section of Interstate 64 in Virginia, results show that the reduction of traffic speed only due to incidents ranges from 41% to 75% if the road is already congested. In this case, precipitation was found to be statistically insignificant. However, regardless of the incident impact, the effect of light rain in free-flow conditions ranges from insignificant to a 4% speed reduction while the effect of heavy rain ranges from a 0.6% to a 6.5% speed reduction when the incident severity is low but has a roughly double effect when the incident severity is high.

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Quistberg, D. Alex, Leah L. Thompson, James Curtin, Frederick P. Rivara, and Beth E. Ebel. "Impact of automated photo enforcement of vehicle speed in school zones: interrupted time series analysis." Injury Prevention 25, no. 5 (2018): 400–406. http://dx.doi.org/10.1136/injuryprev-2018-042912.

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ObjectiveMeasure the impact of automated photo speed enforcement in school zones on motorist speed and speeding violation rates during school travel.MethodsAutomated enforcement cameras, active during school commuting hours, were installed around four elementary schools in Seattle, Washington, USA in 2012. We examined the effect of automated enforcement on motorist speeds and speed violation rates during the citation period (10 December 2012 to 15 January 2015) compared with the ‘warning’ period (1 November to 9 December 2012). We evaluated outcomes with an interrupted time series approach using multilevel mixed linear regression.ResultsMotorist speed violation rates decreased by nearly half in the citation period compared with the warning period (standardised incident rate ratio 0.53, 95% CI 0.42 to 0.66). The hourly maximum violation speed and mean hourly speeds decreased 2.1 MPH (95% CI –2.88 to –1.39) and 1.1 MPH (95% CI –1.64 to – 0.60), respectively. The impact of automated enforcement was sustained during the second year of implementation.ConclusionAutomated photo enforcement of speed limit in school zones was effective at reducing motorist speed violations and also achieved a significant reduction in mean motorist speed.

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Dissertations / Theses on the topic "Impact speed"

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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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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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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 testing, little research has been done on the impacts of differential friction on curves. There are however a number of areas of research that can be related to this topic.By PC Crash simulation modeling, this research identifies that there are a number of gaps in our understanding of the relationship between vehicles maneuvering on a curve and the effect of varying skid resistance. It concludes that taking the average of the two values is not the same as considering them separately and, that as the difference in the co-efficient of friction between the wheel paths increases, the speed at which a vehicle can safely maneuver around a curve decreases. It has also been found that when Electronic Stability Control is used the speed at which the vehicle can safely maneuver around a curve decreases further.

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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 to high speed impacts in the range of 60 m/s to 140 m/s is then developed. An equation-of-state model for porous media is used for the equivalent honeycomb medium. A Taguchi optimization, based on four unknown porous material parameters, is carried out. With the optimal set, the equivalent model can accurately predict perforation velocities for different impact conditions. The methodology for the optimization is explained and can be used for any velocity range. The product of this work is a computationally efficient numerical model that requires less than 8% of the time needed to numerically analyze honeycombs in detail.

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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 and temperature sensitive and the purpose of this project has been to understand the variability of the energy absorption and the associated mechanisms. The main aim has been to show how the two variables interrelate. The materials used have been produced by hot rolling of pre-preg cloth or by resinjection into closed moulds. Reinforcement has consisted of woven glass cloth or random glass mat; matrix materials have been epoxy and polyester resins. Trends to higher values of specific energy absorption with increasing speed have been observed for epoxy matrix tubes, while polyester matrix tubes have shown less certain trends and give lower values of specific energy absorption at high speeds. All the tubes have shown a rapid drop in specific energy absorption with increasing temperature above normal room temperature, with changes in crush mode being very apparent. At temperatures in excess of about 100 degrees C the tubes have failed by centre buckling, the transition temperature from normal crushing to buckling being sensitive to the crush speed. The interrelation between speed and temperature effects has been examined. Three factors that prevent simple interrelation have been identified; these are inertial effects of crush debris, residual stresses in the hoop direction of the tube and frictional heating in the crush zone. Speed sensitivity of the energy absorption has been determined over a range of temperatures and various features of these responses related to the responses of the material properties. Frictional temperature rises have been modelled mathematically and the predictions have been shown to be reasonably consistent with experimental measurements. These temperature rises have been shown to be important in determining the speed sensitive behaviour of the energy absorption levels, particularly for polyester resin matrix tubes tested at high speeds.

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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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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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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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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 speed drives. In addition the performance with PWM inverters connected to 1M via long cables is also studied. The project starts by an evaluation of previous work on the subject and related topics. Relevant conclusions are made based on the literature review in Chapter One. The second step of the project was to develop two test beds in the UCT Machine's Laboratory. The test beds are for performance testing of low (up to 15kW) and medium (up to 75kW) power 1M and their VSDs. The test bed losses are determined at 4 different operating points and documented. Several tests such as the blocked rotor and no load tests were undertaken to determine the machine parameters. A PSpice simulation model was developed and tested for the low voltage test bed. The test results compared well to simulation predictions. Furthermore, tests under unbalanced and overvoltage conditions were performed and the results verified with simulations. This proves that the developed PSpice model can reliably simulate the actual test bed for both balanced and unbalanced conditions. Moreover, it can be easily applied to model different size machines and drives. The information required includes: the motor parameters, drive dc-link parameters, modulation ratio (ma) and the switching frequency. The impact of voltage unbalance in drives with long cables between the inverter and motor is examined. A 36m long, 4-core, PVC insulated cable is used on the low voltage test bed for a case study. The model used for the cable is a lumped parameter model. The 1M model is also taken from the literature to include a high frequency branch, to model the reflected voltage wave phenomenon. A basic analysis of energy savings in pumps and fans load associated with the application of variable speed drives is also done. Boiler feed-pumps from Tutuka power station are used as a case study that may be replicated for other applications in utilities or industry. The developed Excel Spreadsheet program to project the value of savings and determine the payback period is compared to an ABB program. The two results agree within an acceptable range. Therefore, the knowledge of the pumping system specifications and the cost of energy in kWh with the Energy Savings Program would enable one to project energy savings.

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Books on the topic "Impact speed"

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Riad, A. M. Impact of high speed projections into selectedtargets. UMIST, 1994.

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Authority, California High-Speed Rail, and United States. Federal Railroad Administration., eds. Final program environmental impact report/environmental impact statement (EIR/EIS) for the proposed California high-speed train system. California High-Speed Rail Authority, 2005.

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Authority, California High-Speed Rail. Draft program environmental impact report/environmental impact statement (EIR/EIS) for the proposed California high-speed train system. California High-Speed Rail Authority, 2004.

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Authority, California High-Speed Rail. Final Bay Area to Central Valley high-speed train (HST) program environmental impact report/environmental impact statement (EIR/EIS). California High-Speed Rail Authority, 2008.

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Bettini, Virginio. TAV, i perché del no. UTET libreria, 2006.

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Crombie, Hugo. The impact of transport and road traffic speed on health. Health Development Agency, 2002.

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Consultants, Woodward-Clyde, Texas High-Speed Rail Authority, United States. Federal Railroad Administration., and United States. Army. Corps of Engineers., eds. Environmental impact statement: Proposed Texas high-speed rail project : scoping report. Woodward-Clyde Consultants, 1993.

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Lynn, Cheryl. The impact of the 65 MPH speed limit on Virginia's rural interstate highways through 1990. Virginia Transportation Research Council, 1992.

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Ledolter, Johannes. Safety impact of the increased 65 MPH speed limit on Iowa rural interstates. University of Iowa, 1994.

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Center, Langley Research, ed. Evaluation of the impact response of textile composites. National Aeronautics and Space Administration, Langley Research Center, 1995.

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Book chapters on the topic "Impact speed"

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Lehovec, K. "Impact Ionization Breakdown of GaAs Current Limiters." In High-Speed Electronics. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82979-6_24.

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Geffen, Cayley. "The potential for high-speed rail in the US." In Sustainable Innovation and Impact. Routledge, 2018. http://dx.doi.org/10.4324/9781351174824-29.

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Kleine, H., S. Tepper, K. Takehara, T. G. Etoh, and K. Hiraki. "Cavitation induced by low-speed underwater impact." In Shock Waves. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85181-3_16.

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Langer, Arthur M. "The Impact of High-Speed Wireless Communication." In Analysis and Design of Next-Generation Software Architectures. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-76212-3_5.

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Arias, Ángel, Jorge López-Puente, José Antonio Loya, David Varas, and Ramón Zaera. "Analysis of high-speed impact problems in the aircraft industry." In Constitutive Relations under Impact Loadings. Springer Vienna, 2014. http://dx.doi.org/10.1007/978-3-7091-1768-2_4.

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Waitukaitis, Scott R. "Speed-Controlled Impact into Cornstarch and Water Suspensions." In Impact-Activated Solidification of Cornstarch and Water Suspensions. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09183-9_4.

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Gao, Shilong, Zhuang Kai, Tianchong Li, and Wei Sun. "Investigation and Analysis of Service Performance of Cable Arch Bridge Structure Under Accidental Lateral Load." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5814-2_20.

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AbstractThis article investigates the response behavior of such structures under unexpected lateral impact loads, and quantitatively studies the impact of vibration caused by impact on driving performance, pedestrian comfort, and other aspects. Based on parameter analysis methods, explore the impact of impactor quality and speed on the above behavior. The simulation results indicate that as the mass and speed of the impact body increase, the discomfort of driving increases, which is unacceptable to pedestrians.

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Gekle, Stephan, José Manuel Gordillo, Devaraj van der Meer, and Detlef Lohse. "High-Speed Jet Formation after Solid Object Impact." In Computational Fluid Dynamics 2008. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01273-0_78.

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Rioboo, Romain, and Cam Tropea. "Low Speed Drop Impact Onto Dry Solid Surfaces." In Drop-Surface Interactions. Springer Vienna, 2002. http://dx.doi.org/10.1007/978-3-7091-2594-6_10.

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Jangid, Ravi, and Manish Kumar. "Impact Factor for High-Speed Railway Bridge Structures." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-6603-1_27.

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Conference papers on the topic "Impact speed"

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Abdullah, Din, and Abdul Rais Abdul Rahim. "Cable Bending Impact to High-Speed SERDES." In 2024 19th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2024. https://doi.org/10.1109/impact63555.2024.10818904.

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Samuel Raj, K. John, B. Mohan, P. Harikrishnan, et al. "Smart Impact Mitigation: Intelligent Speed and Safety." In 2025 International Conference on Intelligent and Innovative Technologies in Computing, Electrical and Electronics (IITCEE). IEEE, 2025. https://doi.org/10.1109/iitcee64140.2025.10915506.

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Franke, Florian, Sebastian Heimbs, Christian Seidel, Patrik-Vincent Brudzinski, Dominic Huehn, and Uli Burger. "High Speed Impact Testing of Thermoplastic Composite Plates." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12166.

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This paper presents the methodology and results for ballistic impact testing of thermoplastic composite materials. Ten different materials are investigated. The impact behavior of Aluminum 6082 is used as a reference to compare the results. The impact tests are performed with a gas cannon. Force - time, displacement - time as well as velocity data are recorded. Analytic suggestions for the calculation of the penetration speed of the materials are compared with measured results. It can be seen that it is possible to calculate the penetration speed within a certain percentage of the measured value. Also, the absorbed energies during the penetration process are compared. The results show that glass fiber composites have a better impact material behavior than carbon fiber-reinforced composites (CFRP). Thermoplastic matrix systems are a cheap option for composites but they do not have a significant better high speed impact and damage behavior than duroplastic resins.

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Huang, Chih-Yi, Hung-Hsiang Cheng, Chen-Chao Wang, Ya-Wen Huang, and Tsun-Lung Hsieh. "The Optimal window-BGA Design for High-Speed SDRAM." In Circuits Technology Conference (IMPACT). IEEE, 2008. http://dx.doi.org/10.1109/impact.2008.4783810.

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Chang, Pifeng, Eric Chang, Peter Liang, and Jack Lin. "The Development of High Speed and Low Loss Materials." In Circuits Technology Conference (IMPACT). IEEE, 2008. http://dx.doi.org/10.1109/impact.2008.4783837.

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Chang, Po-Hao, Bryan Hsieh, Kevin Chiang, Jeng-Yuan Lai, and Yu-Po Wang. "Time Delay Control Methodology for High Speed Substrate Design." In Circuits Technology Conference (IMPACT). IEEE, 2008. http://dx.doi.org/10.1109/impact.2008.4783863.

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Pan, Po-Chin, Hung-Hsiang Cheng, and Chen-Chao Wang. "High speed SerDes design verification." In 2014 9th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2014. http://dx.doi.org/10.1109/impact.2014.7048438.

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Kupchella, Ryan, and Chaz Ruoff. "Numerical Modeling of High-Speed Impacts Involving thin Film." In 2022 16th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/hvis2022-29.

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Abstract A parallelized approach for simulating tearing in thin material with a hydro-structural code is presented. The approach is built upon the shell finite element formulation and incorporates a simple remeshing scheme to facilitate material separation behind propagating tears. Tear propagation is handled using an implementation of the Virtual Crack Closure Technique (VCCT) to predict fracture based on the homogenized critical strain energy release rate (Gc). The approach is demonstrated with a simulation of an impact event from a joint JAXA/NASA series of light gas gun tests. A marked improvement in model outcome with the use of the VCCT implementation is demonstrated through quantitative and qualitative comparisons between numerical debris characteristics and experimental data.

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Bell, A. K., B. Elsasser, and T. Whittaker. "Environmental Impact of Fast Ferry Wash in Shallow Water." In Hydrodynamics of High Speed Craft. RINA, 2000. http://dx.doi.org/10.3940/rina.hs.2000.07.

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Cheng-Pin Chen, Jing-Hua Cheng, Wen-Jeng Fan, Nan-Chun Lin, and Ting-Feng Su. "Bandwidth simulation for high speed memory package." In 2007 International Microsystems, Packaging, Assembly and Circuits Technology. IEEE, 2007. http://dx.doi.org/10.1109/impact.2007.4433579.

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Reports on the topic "Impact speed"

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Mathew, Jijo K. Speed Enforcement in Work Zones and Synthesis on Cost-Benefit Assessment of Installing Speed Enforcement Cameras on INDOT Road Network. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317639.

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Work zone safety is a high priority for transportation agencies across the United States. High speeds in construction zones are a well-documented risk factor that increases the frequency and severity of crashes. It is therefore important to understand the extent and severity of high-speed vehicles in and around construction work zones. This study uses CV trajectory data to evaluate the impact of several work zone speed compliance measures, such as posted speed limit signs, radar-based speed feedback displays, and automated speed enforcement on controlling speeds inside the work zone. This study also presents several methodologies to characterize both the spatial and temporal effects of these control measures on driver behavior and vehicle speeds across the work zones.

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Tieszen, S. R., and S. W. Attaway. Fuel dispersal in high-speed aircraft/soil impact scenarios. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/188568.

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Talebpour, Alireza, Yanlin Zhang, Tina Radvand, and Mahdi Yousefi. Advancing Self-Enforcing Streets Phase 1: The Relationship between Roadway Environment and Crash Severity. Illinois Center for Transportation, 2024. https://doi.org/10.36501/0197-9191/24-026.

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The concept of self-enforcing roadways (SER) has been proposed as a speed management strategy to achieve harmony in drivers’ speed selection and to address safety issues associated with excessive speeding. While numerous examples of SER implementation exist outside of the United States (particularly in European countries), this concept is fairly new in the United States. Only a few states in the U.S. have explored the possibility of implementing SER and evaluated its potential impacts on roadway safety. Accordingly, this study aims at (1) providing a comprehensive review of the literature on SER implementation and impact assessment across the world and (2) examining how roadway elements influence operating speeds and, consequently, crash outcomes, in Illinois, shedding light on the potential impact of roadway design and features on crash severity. A specific before-and-after study is required to analyze carefully the impacts of various SER strategies on safety in the state of Illinois.

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Yu, Jian H., and Peter G. Dehmer. Dynamic Impact Deformation Analysis Using High-speed Cameras and ARAMIS Photogrammetry Software. Defense Technical Information Center, 2010. http://dx.doi.org/10.21236/ada537764.

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Riley, Michael R., Timothy W. Coats, and Heidi Murphy. Acceleration Response Mode Decomposition for Quantifying Wave Impact Load in High-Speed Planing Craft. Defense Technical Information Center, 2014. http://dx.doi.org/10.21236/ada621230.

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Strassburger, Elmar. High-Speed Photographic Study of Wave Propagation and Impact Damage in Transparent Aluminum Oxynitride (AION). Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada457205.

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Tarko, Andrew P., Raul Pineda-Mendez, and Qiming Guo. Predicting the Impact of Changing Speed Limits on Traffic Safety and Mobility on Indiana Freeways. Purdue University, 2019. http://dx.doi.org/10.5703/1288284316922.

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Coviello, Decio, Andrea Ichino, and Nicola Persico. Don't Spread Yourself Too Thin: The Impact of Task Juggling on Workers' Speed of Job Completion. National Bureau of Economic Research, 2010. http://dx.doi.org/10.3386/w16502.

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Sullivan, G. P., K. K. Daellenbach, and G. E. Spanner. Impact evaluation of adjustable speed drives installed at Hewlett- Packard Company under the Energy $avings Plan. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10186388.

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Caicedo, Santiago, and Jeremy Pearce. Need for Speed: Quality of Innovations and the Allocation of Inventors. Federal Reserve Bank of New York, 2024. http://dx.doi.org/10.59576/sr.1127.

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This paper studies how the speed-quality tradeoff in innovation interacts with firm dynamics, concentration, and economic growth. Empirically, we document long-run trends in the increasing speed of innovation alongside declining quality at large firms. Leveraging variation from an exogenous policy change, we document the existence of the speed-quality tradeoff both at the firm and aggregate level. We develop an endogenous growth model that incorporates the speed-quality tradeoff and show that allocating less labor towards speed increases growth, particularly in the presence of private benefits to innovation and spillovers from heterogeneous innovations. We quantify the model to link firms’ decisions across speed and quality to aggregate outcomes. Quantitatively, the recent growth slowdown is mainly due to changes in the innovation production function, while the allocation of inventors between speed and quality within firms has a modest impact. When spillovers across firms are taken into account, the effect becomes significantly larger; the shift to speed over the last 30 years explains up to one-quarter of the decrease in growth.

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