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Relevant bibliographies by topics / Frequency of collisions

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Academic literature on the topic 'Frequency of collisions'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Frequency of collisions"

1

Chernoff, David F., and Xiaolan Huang. "Frequency of Stellar Collisions in Three-Body Heating." Symposium - International Astronomical Union 174 (1996): 263–72. http://dx.doi.org/10.1017/s0074180900001601.

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The probability for collisional interaction of three body binaries is calculated as a function of the physical radius and mass of the stellar objects and the depth of the cluster potential well. For typical cluster parameters, there is a significant chance of physical collision for objects as small as white dwarfs. One consequence of the collisions is to lower the amount of heat produced from hardening a binary, thereby diminishing the efficiency of the three-body heating mechanism.

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Braddock, Mary, Garry Lapidus, David Gregorio, Mary Kapp, and Leonard Banco. "Population, Income, and Ecological Correlates of Child Pedestrian Injury." Pediatrics 88, no. 6 (1991): 1242–47. http://dx.doi.org/10.1542/peds.88.6.1242.

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Pedestrian injury is a significant health problem among urban children. This study is an analysis of the role of population, income, and ecological factors in the occurrence of child pedestrian collisions. One hundred and ninety-eight motor vehicle collisions occurring in Hartford, Connecticut involving pedestrians younger than 15 years old were reported to police during 1986 through 1987. Collision locations were abstracted from police reports and assigned a census tract. Census tracts were classified as "high frequency" (8+ collisions), "moderate frequency" (3 to 7 collisions), or "low frequ

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Fan, Jing Jing, and Jian Ming Ding. "Analyzing Crash Frequency by Collision Type at Freeway Diverge Areas." Advanced Materials Research 748 (August 2013): 1277–80. http://dx.doi.org/10.4028/www.scientific.net/amr.748.1277.

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The objective of this study is to analyze the crash frequency by collision type at freeway diverge areas. Three major collision types were identified in this study including rear-end, sideswipe and angle collisions. We compared the crash counts and crash rates by collision type between exit ramp. The data analysis results show that exit ramps with lane-balance design have lower crash frequency and crash rate of rear-end collisions than those not lane-balanced.

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Weng, Jinxian, Qiang Meng, and Xiaobo Qu. "Vessel Collision Frequency Estimation in the Singapore Strait." Journal of Navigation 65, no. 2 (2012): 207–21. http://dx.doi.org/10.1017/s0373463311000683.

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This paper aims to estimate Vessel Collision Frequency in the Singapore Strait. This frequency is obtained as the product of the number of Vessel Conflicts and the causation probability using the real-time vessel movement data from the Lloyd's Marine Intelligence Unit (Lloyd's MIU) database. The results show that the container carriers have the highest Vessel Collision Frequency while Roll-On Roll-Off (RORO) and passenger ships have the lowest frequency. Tankers cause the highest head-on collision frequency. In the Singapore Strait, the most risky overtaking area is between longitudes 103°48′E

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ROSENBERG, M. "A note on ion–dust streaming instability in a collisional dusty plasma." Journal of Plasma Physics 67, no. 4 (2002): 235–42. http://dx.doi.org/10.1017/s0022377802001678.

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This note investigates an ion-dust streaming instability with frequency ω less than the dust collision frequency νd, in an unmagnetized collisional dusty plasma. Under certain conditions, a resistive instability can be excited by an ion drift on the order of the ion thermal speed, even when the dust acoustic wave is heavily damped. The effect of weak collisions on the usual dust acoustic instability in the regime ω > νd is also considered. Applications to experimental observations of low-frequency fluctuations in laboratory d.c. glow discharge dusty plasmas are discussed.

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Chtab, Anna, and Mikhael Gorokhovski. "Large-Eddy Simulation With Simplified Collisional Microdynamics in a High Reynolds Number Particle-Laden Channel Flow." Journal of Fluids Engineering 129, no. 5 (2006): 613–20. http://dx.doi.org/10.1115/1.2717619.

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Computing high Reynolds number channel flows laden by heavy solid particles requires excessive CPU resources to calculate interparticle collisions. Since the frequency of these collisions is high, the kinematic details of each elementary collision may not be essential when calculating particle statistics. In this paper, the dynamics of a particle with a phase trajectory that is discontinuous (due to collisions) is simulated using a hypothetical “noncolliding” particle moving along a trajectory smoothed over interparticle collisions. The statistical temperature of this particle is assumed to be

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Čorić, Mirko, Sadko Mandžuka, Anita Gudelj, and Zvonimir Lušić. "Quantitative Ship Collision Frequency Estimation Models: A Review." Journal of Marine Science and Engineering 9, no. 5 (2021): 533. http://dx.doi.org/10.3390/jmse9050533.

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Ship collisions are one of the most common types of maritime accidents. Assessing the frequency and probability of ship collisions is of great importance as it provides a cost-effective and practical way to mitigate risk. In this paper, we present a review of quantitative ship collision frequency estimation models for waterway risk assessment, accompanied by a classification of the models and a description of their main modelling characteristics. Models addressing the macroscopic perspective in the estimation of ship collision frequency on waterways are reviewed in this paper with a total of 2

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Kim, Eui-Jin, Oh Hoon Kwon, Shin Hyoung Park, Dong-Kyu Kim, and Koohong Chung. "Application of naïve Bayesian approach in detecting reproducible fatal collision locations on freeway." PLOS ONE 16, no. 5 (2021): e0251866. http://dx.doi.org/10.1371/journal.pone.0251866.

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Detecting high-collision-concentration locations based solely on collision frequency may produce different results compared to those considering the severities of the collisions. In particular, it can lead government agencies focusing sites with a high collision frequency while neglecting those with a lower collision frequency but a higher percentage of injury and fatal collisions. This study developed systematic ways of detecting reproducible fatal collision locations (R) using the naïve Bayes approach and a continuous risk profile (CRP) that estimates the true collision risk by filtering out

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ZENIT, R., M. L. HUNT, and C. E. BRENNEN. "Collisional particle pressure measurements in solid–liquid flows." Journal of Fluid Mechanics 353 (December 25, 1997): 261–83. http://dx.doi.org/10.1017/s0022112097007647.

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Experiments were conducted to measure the collisional particle pressure in both cocurrent and countercurrent flows of liquid–solid mixtures. The collisional particle pressure, or granular pressure, is the additional pressure exerted on the containing walls of a particulate system due to the particle collisions. The present experiments involve both a liquid-fluidized bed using glass, plastic or steel spheres and a vertical gravity-driven flow using glass spheres. The particle pressure was measured using a high-frequency-response flush-mounted pressure transducer. Detailed recordings were made o

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Valeev, V. G., and Yu A. Kukharenko. "Collisional relaxation of the order parameter in superconductors." Soviet Journal of Low Temperature Physics 11, no. 8 (1985): 455–59. https://doi.org/10.1063/10.0031337.

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A kinetic equation for the density matrix of a superconductor with a collision integral that conserves the number of particles is derived. The equation is used to study the relaxation of the modulus of the order parameter in the collisional frequency range ω ≲ vϵ (vϵ is the frequency of inelastic collisions). Near Tc, small spatially uniform perturbations Δ decay over times of τΔ ∽ Tc /Δvϵ ; taking into account the accompanying evolution of the temperature of the superconductor leads to renormalization of the numerical coefficient in this dependence.

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Dissertations / Theses on the topic "Frequency of collisions"

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Carvajal, Alexander. "Temporal and spatial dependency of high frequency wave collisions in rat somatosensory cortex." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/A_Carvajal_062208.pdf.

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Fayed, Hassan El-Hady Hassan. "Particles and Bubbles Collisions Frequency in Homogeneous Turbulence and Applications to Minerals Flotation Machines." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/24910.

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The collisions frequency of dispersed phases (particles, droplets, bubbles) in a turbulent carrier phase is a fundamental quantity that is needed for modeling multiphase flows with applications to chemical processes, minerals flotation, food science, and many other industries. In this dissertation, numerical simulations are performed to determine collisions frequency of bi-dispersed particles (solid particles and bubbles) in homogeneous isotropic turbulence. Both direct numerical simulations (DNS) and Large Eddy simulations (LES) are conducted to determine velocity fluctuations of the carrier

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Bryant, Paul M. "Investigations of electropositive and electronegative RF discharges." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365857.

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Rivenq, Atika. "Etude de systèmes anti-collision basés sur les techniques radar pour véhicules routiers." Valenciennes, 1996. https://ged.uphf.fr/nuxeo/site/esupversions/08c0d176-22f2-43e1-9790-c2656a116cac.

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L’objectif de ce travail est de concevoir un radar anticollision micro-onde qui sera embarqué sur les véhicules pour renforcer la sécurité routière. Deux technologies radars ont été testées : le radar à impulsions et le radar à modulation de fréquence. Les deux radars sont adaptés à la détection d'obstacles, mais ne permettent pas la détection de certains intervalles de distances. La solution a été d'associer ces deux radars dans un seul ensemble que nous appelons radar bi mode. Ce dernier a été ainsi réalisé et teste avec succès en temps réel. Dans cette étude, nous nous sommes intéressés aux

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Clarke, Bryan Russell. "Frequency Modulated Continuous Waveform Radar for Collision Prevention in Large Vehicles." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14034.

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The drivers of large vehicles can have very limited visibility, which contributes to poor situation awareness and an increased risk of collision with other agents. This thesis is focused on the development of reliable sensing for this close proximity problem in large vehicles operating in harsh environmental conditions. It emphasises the use of in-depth knowledge of a sensor’s physics and performance characteristics to develop effective mathematical models for use in different mapping algorithms. An analysis of the close proximity problem and the demands it poses on sensing technologies is pre

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Mäkiharju, Simo Aleksi. "Aerosol dynamics in a turbulent jet." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1122929507.

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Pupunwiwat, Prapassara. "Tag Anti-Collision Resolution for Improved Quality of RFID Data Streams." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/367855.

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Radio Frequency Identication (RFID) is a technology that allows automatic identication of people or objects by incorporating the use of radio frequency waves to transmit data between networked electromagnetic readers and tags. RFID is considered an emerging technology for advancing a wide range of applications, such as supply chain management and distribution. However, despite the extensive development of the RFID technology in many areas, the RFID tags collision problems remain a serious issue. Collision problems occur due to the simultaneous presence of multiple numbers of tags within the re

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Rohatgi, Anil. "Implementation and Applications of an Anti-Collision Differential-Offset Spread Spectrum RFID System." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13946.

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This report documents the design, construction, and implementation of a differential-offset spread spectrum RFID system, to avoid the problem of anti-collision interference from multiple RFID tags. Currently in industry, this problem is handled by establishing a two way communication link between the tags and the interrogator. The proposed system eliminates the need for the excessive hardware use to create this link, and therefore drastically reduces the cost of each tag. Not only is this system cheaper to implement but it is faster, requires less power, and by the nature of the design contai

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Kamineni, Neelima. "A Study of Anti-collision Multi-tag Identification Algorithms for Passive RFID Systems." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28439/.

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The major advantages of radio frequency identification (RFID) technology over barcodes are that the RFID-tagged objects do not require to be in line-of-sight with the reader for their identification and multiple objects can be read simultaneously. But when multiple objects are read simultaneously there is always a problem of collision which reduces the efficiency of the system. This thesis presents a comprehensive study of the dynamic framed slotted ALOHA (DFSA)-based anti-collision multi-tag identification algorithms for passive RFID system. Performance of various DFSA algorithms is compared

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Alagappan, Azhagammai. "Studies of collisional energy transfer in the CN radical by frequency-modulated spectroscopy." Thesis, Heriot-Watt University, 2007. http://hdl.handle.net/10399/62.

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Books on the topic "Frequency of collisions"

1

Alan, Stern S., and United States. National Aeronautics and Space Administration., eds. Gamma-ray burst constraints on the galactic frequency of extra-solar Oort clouds. National Aeronautics and Space Administration, 1994.

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Alan, Stern S., and United States. National Aeronautics and Space Administration., eds. Gamma-ray burst constraints on the galactic frequency of extra-solar Oort clouds. National Aeronautics and Space Administration, 1994.

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Douglas, D. J. Collisional focusing effects in radio frequency quadrupoles. [s.n.], 1991.

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Jacques, Pelletier, and SpringerLink (Online service), eds. Physics of Collisional Plasmas: Introduction to High-Frequency Discharges. Springer Netherlands, 2012.

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Ruff, T. M. Test results of collision warning systems for surface mining dump trucks. U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 2000.

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Troutbeck, Rod. Rational standards for bridge barriers: Procedure for estimating collision frequency and severity for bridge barriers. Physical Infrastructure Centre, School of Civil Engineering, Queensland University of Technology, 1995.

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Moisan, Michel, and Jacques Pelletier. Physics of Collisional Plasmas: Introduction to High-Frequency Discharges. Springer, 2014.

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Gamma-ray burst constraints on the galactic frequency of extra-solar Oort clouds. National Aeronautics and Space Administration, 1994.

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Morawetz, Klaus. Elementary Principles. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797241.003.0002.

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The many-body theory combines ideas of thermodynamics with ideas of mechanics. In this introductory chapter, the symbiosis of these two different fields of physics is demonstrated on overly simplified models. We explore the principles of finite-range forces to show the twofold nature of virial corrections. Infrequent collisions with a large deflection angle lead to collision integrals and rather frequent encounters with deflections on small angles act as a mean field. The (mean-field) corrections to drift result in the internal pressure and the nonlocal correction to the collisions results in

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Henriksen, Niels Engholm, and Flemming Yssing Hansen. Microscopic Interpretation of Arrhenius Parameters. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198805014.003.0008.

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This chapter reviews the microscopic interpretation of the pre-exponential factor and the activation energy in rate constant expressions of the Arrhenius form. The pre-exponential factor of apparent unimolecular reactions is, roughly, expected to be of the order of a vibrational frequency, whereas the pre-exponential factor of bimolecular reactions, roughly, is related to the number of collisions per unit time and per unit volume. The activation energy of an elementary reaction can be interpreted as the average energy of the molecules that react minus the average energy of the reactants. Speci

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Book chapters on the topic "Frequency of collisions"

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Verhaar, B. J., and H. T. C. Stoof. "Collisions of Atoms in Microwave and Laser Fields." In Frequency Standards and Metrology. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74501-0_80.

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Ramp, Daniel, and Erin Roger. "Frequency of animal-vehicle collisions in NSW." In Too close for comfort. Royal Zoological Society of New South Wales, 2008. http://dx.doi.org/10.7882/fs.2008.017.

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Moorman, L., E. J. Galvez, K. A. H. van Leeuwen, et al. "Two-Frequency Microwave Quenching of Highly Excited Hydrogen Atoms." In Atomic Spectra and Collisions in External Fields. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1061-7_27.

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Mlynek, J., Chr Tamm, E. Buhr, and W. Lange. "Raman Heterodyne Detection of Radio-Frequency Resonances in Sm Vapor: Effects of Velocity-Changing Collisions." In Springer Series in Optical Sciences. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-540-39664-2_27.

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Gooch, Jan W. "Collision Frequency Factors." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2589.

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Garrett, Steven L. "Attenuation of Sound." In Understanding Acoustics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_14.

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Abstract We will capitalize on our understanding of thermoviscous loss to develop an understanding of the attenuation of sound waves in fluids that are not influenced by proximity to solid surfaces. Such dissipation mechanisms are particularly important at very high frequencies and short distances (for ultrasound) or very low frequencies over geological distances (for infrasound). The Standard Linear Model of viscoelasticity introduced the nondimensional frequency, ωτR, that controlled the medium’s elastic (in-phase) and dissipative (quadrature) responses. Those response curves were “universal

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Ye, Xin, Cong Chen, and Thomas Eisenbarth. "Non-Linear Collision Analysis." In Radio Frequency Identification: Security and Privacy Issues. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13066-8_13.

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Li, Tongtong, Tianlong Song, and Yuan Liang. "Collision-Free Frequency Hopping and OFDM." In Wireless Communications under Hostile Jamming: Security and Efficiency. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0821-5_4.

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Bleaney, Brebis. "Collision Broadening and Radio-frequency Spectroscopy." In Amazing Light. Springer New York, 1996. http://dx.doi.org/10.1007/978-1-4612-2378-8_8.

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Gray, C. G., C. G. Joslin, and J. D. Poll. "Calculation of high-frequency wings of interaction-induced spectra." In Collision- and Interaction-Induced Spectroscopy. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0183-7_28.

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Conference papers on the topic "Frequency of collisions"

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Guo, Xin, Tong Xu, Yingchen Pi, Yihua Liu, and Mingxing Ren. "The synergetic prevention and control system of bridge-ship collision based on digital twin." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.1572.

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<p>In recent years, bridge-ship collisions have occurred with increasing frequency, often leading to severe secondary accidents such as bridge collapse, ship sinking, and loss of life. The risk of bridge- ship collisions is a complex issue involving multiple systems, factors, and interdisciplinary fields. Currently, the synergetic mechanisms between waterway and land transportation systems have not been fully elucidated. To address the risk of bridge-ship collisions and mitigate secondary accidents, this paper proposes a bridge collision prevention system based on digital twin technology

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Hägglund, Kristoffer, Jan Nilsson, and Gunnar Eriksson. "Link Performance Degradation from Frequency-Hop Collisions in Asynchronous Military Networks." In 2025 International Conference on Military Communication and Information Systems (ICMCIS). IEEE, 2025. https://doi.org/10.1109/icmcis64378.2025.11047681.

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Kryukovsky, Andrew S., Elizabeth V. Mikhaleva, and Dmitry V. Rastyagaev. "Amplitude Method for Reconstructing the Effective Frequency of Electron Collisions on Low-Inclination Ionospheric Paths." In 2024 IEEE 9th All-Russian Microwave Conference (RMC). IEEE, 2024. https://doi.org/10.1109/rmc62880.2024.10846862.

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Yang, Giwon, Hyungjoon Shin, and Hyogon Kim. "Frequency Hopping as Diffusion: A New Perspective on Mitigating Bluetooth Packet Collisions in Dense Deployments." In 2024 IEEE 21st International Conference on Mobile Ad-Hoc and Smart Systems (MASS). IEEE, 2024. http://dx.doi.org/10.1109/mass62177.2024.00015.

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Brivio, Riccardo, Anna Crippa, Matteo Baiguera, Samuele Portanti, and Mattia Bertolo. "Detect and Avoid function for UAVs using ACAS Xu for Non-Cooperative Targets." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-274.

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Advanced Air Mobility (AAM) is an innovative concept that aims to revolutionize air transportation through electric and unmanned aircraft, enabling applications such as urban air taxis and medical transport. However, one of the key challenges to its widespread adoption is ensuring safety, particularly in collision avoidance. This study focuses on the development of a perception and guidance system for avoiding collisions with non-cooperative targets, which do not share their position or trajectory. To achieve this, a Frequency-Modulated Continuous Wave (FMCW) radar and an InfraRed(IR) camera a

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Haidar, Ahmad, and Jose Palacios. "Experimental Model Validation of a Passive Balancing Device for Supercritical Helicopter Driveshafts." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11565.

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A system of passive balancing devices could potentially be used to suppress vibrations in helicopter tailrotor driveshafts. Passive balancing devices for rotary shafts consist of masses restricted by concentric guides about the shaft axis. At supercritical shaft speeds, the balancing masses automatically adjust to counter imbalance due to uneven load distribution. The problem is highly nonlinear and requires comprehensive modeling to achieve satisfactory prediction of the balancing behavior. A frequency-scaled tailrotor driveshaft test rig was fabricated to test the performance of a passive ba

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Turla, Tejashree, Xiang Liu, Zhipeng Zhang, and Zheyong Bian. "Analysis of Train Collision Risk in the United States: 2001 to 2015." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6157.

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Railways have a substantial contribution to the economy of the United States. However, a train accident can result in casualties and extensive damages to infrastructure and the environment. Most of the prior research focused on derailments or grade-crossing accidents rather than the study of train collisions. The Federal Railroad Administration (FRA) identifies over 300 causes for all types of accidents, among which we aim to recognize the major factors that cause train collisions. Evaluating how collision frequency and severity vary with the accident cause is the key part of this research, in

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Wang, Yanlei, Shuang Xu, and Xiang Liu. "Risk Analysis of Freight Train Collisions in the United States, 2000 to 2014." In 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5738.

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Train accidents damage infrastructure and rolling stock, disrupt operations, and may result in casualties and environmental damage. While the majority of previous studies focused on the safety risks associated with train derailments or highway-rail grade crossing collisions, much less work has been undertaken to evaluate train collision risk. This paper develops a statistical risk analysis methodology for freight-train collisions in the United States between 2000 and 2014. Negative binomial regression models are developed to estimate the frequency of freight-train collisions as a function of y

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Usman, Muhammad, Simone Raponi, Marwa Qaraqe, and Gabriele Oligeri. "KaFHCa: Key-establishment via Frequency Hopping Collisions." In ICC 2021 - IEEE International Conference on Communications. IEEE, 2021. http://dx.doi.org/10.1109/icc42927.2021.9500315.

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Friberg, Stephen R., Wenbin Jiang, Yoshitaka Sakai, and Raymond J. Hawkins. "Observation of Two-Color Soliton Collisions in Optical Fiber." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/up.1990.tha3.

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Solitons and soliton collisions were described by Zahkarov and Shabat1 in 1972, and shown to be possible in optical fibers by Hasegawa2 in 1973. Two solitons with different center frequencies propagating in the same direction can collide, as they have different group velocities. Such two-color soliton collisions are different than soliton collisions with identical frequencies.3 The two solitons emerging from a two-color soliton collision experience phase and timing shifts determined by the energies of the solitons. As a result, soliton collisions may be useful for quantum non-demolition measur

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Reports on the topic "Frequency of collisions"

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Ekambaram, Karthikeyan, Bethany Frox, Niamh Bull, and Emma Lyndon. Pedal Misapplication Study. TRL Limited, 2023. http://dx.doi.org/10.58446/omrt5829.

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Pedal misapplication is when the driver applies the wrong pedal of a vehicle, for example: accelerating instead of braking. When followed by the inability to regain control, this can result in collisions, causing damage to vehicles, infrastructure, and potentially, fatal injury. Current figures of pedal misapplication occurrences are potentially underestimated as depends heavily on driver statements, which are often unreliable. As a result, investigators are reliant on other data sources such as camera footage and examining the vehicle controls to determine the cause of the collision. This stu

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Ahmad, Noshin S., Raul Pineda-Mendez, Fahad Alqahtani, Mario Romero, Jose Thomaz, and Andrew P. Tarko. Effective Design and Operation of Pedestrian Crossings. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317438.

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Pedestrians are vulnerable road users since they are prone to more severe injuries in any vehicular collision. While innovative solutions promise improved pedestrian safety, a careful analysis of local conditions is required before selecting proper corrective measures. This research study had two focuses: (1) methodology to identify roads and areas in Indiana where the frequency and severity of pedestrian collisions are heightened above the acceptable level, and (2) selecting effective countermeasures to mitigate or eliminate safety-critical conditions. Two general methods of identifying speci

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Shah, Tushar. Measurement of $B^0$ Mixing Frequency Using a New Probability Based Self-Tagging Algorithm Applied to Inclusive Lepton Events from $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.8-TeV. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/1371860.

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Perez, Lance C., and Xia Chen. Wireless Multiple Access Communications Using Collision Frequency Shift Keying. Defense Technical Information Center, 2004. http://dx.doi.org/10.21236/ada431943.

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Sriraj, P. S., Kazuya Kawamura, Paul Metaxatos, et al. Railroad-Highway Crossing Safety Improvement Evaluation and Prioritization Tool. Illinois Center for Transportation, 2023. http://dx.doi.org/10.36501/0197-9191/23-009.

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The expected crash frequency model of Illinois Department of Transportation’s Bureau of Design and Environment needed improvement to incorporate track circuitry as well as pedestrian exposure at railroad-highway grade crossings to make the model more comprehensive. The researchers developed, calibrated, and validated three models to predict collision rates at public, at-grade railroad-highway crossings in Illinois’ six-county northeast region for prioritizing railroad-highway crossings for safety improvements. The first model updated B-factors in the existing Illinois model, which was last val

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Slinker, S., and A. W. Ali. Electron Momentum Transfer Collision Frequency in N(2), O(2) and Air. Defense Technical Information Center, 1985. http://dx.doi.org/10.21236/ada157030.

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BACCELLI, François, Sébastien CANDEL, Guy PERRIN, and Jean-Loup PUGET. Large Satellite Constellations: Challenges and Impact. Académie des sciences, 2024. http://dx.doi.org/10.62686/3.

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The New Space Age (NewSpace) marks the advent of a new era in the use of space, characterized by the opening of space to new players, the use of new space technologies, new functionalities for satellites in orbit, and the development of satellite constellations, mainly in the fields of communications and Earth observation. These developments are underpinned by first-rate scientific and technological advances, as well as considerable public and private investment, in particular in the USA, China and, to a lesser extent, Europe. Fleets of small low- and medium-orbit satellites are replacing or c

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Slinker, Steven P., Richard F. Hubbard, and Martin Lampe. Variable Collision Frequency Effects on Hose and Sausage Instabilities in Relativistic Electron Beams. Defense Technical Information Center, 1987. http://dx.doi.org/10.21236/ada184206.

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McColl, W., C. Brooks, and M. L. Brake. Electron density and collision frequency of microwave resonant cavity produced discharges. [Progress report]. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10112403.

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Catto, P. J., and J. R. Myra. A quiver kinetic formulation of radio frequency heating and confinement in collisional edge plasmas. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/6356585.

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