Dissertations / Theses on the topic 'Collisions'
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Horton, Timothy Scott. "COLLISIONAL AND RADIATIVE RELAXATION IN SODIUM DIMER AND ARGON ATOM COLLISIONS." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1480693544113525.
Full textKantak, Advait Ashok. "Wet particle collisions." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p3190381.
Full textNesbitt, Brian. "Heavy-particle collisions." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301028.
Full textHarris, Allison Lynn. "Fully differential cross sections for four-body scattering processes." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Harris_09007dcc806c3b59.pdf.
Full textVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed August 25, 2009) Includes bibliographical references (p. 84-92).
Planchette, Carole. "Collisions de gouttes asymétriques." Phd thesis, Université Paris-Est, 2011. http://tel.archives-ouvertes.fr/tel-00647892.
Full textMcGuinness, Philip. "Electron-ion elastic collisions." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268236.
Full textCopeland, Fiona B. M. "Low energy rearrangement collisions." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318881.
Full textMcAlinden, Mary Trea. "Atomic collisions involving positrons." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317480.
Full textGrishkevich, Sergey. "Ultracold collisions in traps." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16098.
Full textThe ultracold atomic and molecular physics as it is accessible, e.g., in Bose-Einstein condensates of dilute gases was investigated. In such systems two-body collisions are dominant and their detailed study is one of the central topics of this work. They were done considering elementary chemical reactions as photoassociation, and magnetic Feshbach resonances. Additionally, studies of atoms in optical lattice sites were carried out. The many-body systems were not only considered within the usually adopted mean-field approach but also beyond that in order to simulate the fully correlated motion.
O'Connor, Daryl John. "Atomic collisions with surfaces." Thesis, Canberra, ACT : The Australian National University, 1997. http://hdl.handle.net/1885/144473.
Full textBraud, Isabelle. "Collisions agrégats-molécules : attachement, fragmentation, nanocalorimétrie." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30187/document.
Full textThe experimental set-up developed in Toulouse enables to control collisions between a charged thermalised mass-selected free cluster and molecules. Processes of attachement of the molecule onto the cluster and collision induced fragmentation can be studied. In order to better understand the process of attachment of a molecule onto a cluster, we have measured attachment cross-sections of alcohol molecules, methanol and ethanol, onto alcohol clusters. We have observed a similar behaviour as the one observed with water clusters, that is attachment cross-sections that are lower than the geometrical cross-section at small sizes and that converge to this geometrical cross-section at bigger sizes. This behaviour had been assigned to a dynamical effect in the case of water. This dynamical model can be extended with a good qualitative agreement to alcohol clusters. Processes of attachment and fragmentation enable to realise nanocalorimetry measurements. We have determined heat capacities and transition temperatures for protonated water clusters (H2O)nH+. They complete measurements already done for deprotonated water clusters (H2O)n-1OH-. The nature of the phase transition is discussed. The last part of this dissertation concerns collision induced fragmentation for molecules that has some biological interest : protonated uracil, bare or hydrated. Fragmentation pathways of the protonated uracil molecule has been observed. The influence of the number of water molecules on the fragmentation pattern of solvated uracil is linked to the proton affinity of the constituants and to the cluster structure
Alami, Rachad. "Contribution à l'étude de la dynamique des mécanismes très dissipatifs entre noyaux lourds." Paris 11, 1986. http://www.theses.fr/1986PA112326.
Full textFranck, Martin, and Roos Malin Holm. "COLLISIONS IN ICE : A STUDY OF COLLISIONS INVOLVING SWEDISH ICEBREAKERS IN THE BALTIC SEA." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-25468.
Full textDenna studie genomfördes i syfte att utöka den akademiska kunskapen om kollisioner sominvolverar svenska isbrytare i Östersjön. Den ämnade identifiera orsakerna och de omedelbaraeffekterna av dessa kollisioner. Vidare sökte den fastslå huruvida regelverk och riktlinjer förden svenska isbrytartjänsten var tillräckliga och om de efterlevdes.Studien genomfördes som en kvalitativ litteraturstudie av all data, med anknytning tillisbrytarkollisioner, som fanns tillgänglig i Sjöfartsverkets och Transportstyrelsens arkiv. Ettflertal utländska myndigheter som utreder olyckor assisterade vid framtagandet av modellenför bearbetning av datan.Efter att ha bearbetat och undersökt datan kunde förekomsten av olika bidragande orsaker tillisbrytarkollisionerna slås fast. Alla kollisioner inträffade under isbrytarassistans. Det stodklart att den övergripande orsaken var svårigheten i att utvärdera isförhållandena och deåtgärder fartygen tvingas vidta för att kunna ta sig fram genom isen. Vidare fastslogs att deomedelbara effekterna, för såväl fartyg som besättning och miljö, inte var förödande utan avbegränsad karaktär. Det fastslogs även att de regelverk och riktlinjer som styr den svenskaisbrytarverksamheten överlag efterlevdes och var tillräckliga för att säkerställa entillfredställande säker och effektiv isbrytartjänst.
Schönning, Karin. "Meson production in pd collisions." Doctoral thesis, Uppsala universitet, Kärn- och partikelfysik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-100786.
Full textDiehl, Markus. "Diffraction in electron-proton collisions." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/265482.
Full textNagy, Jozsef Bordas. "Kilovolt collisions of small ions." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/21086.
Full textO'Rouke, Sheelagh Francesca Camille. "Theory of ion-atom collisions." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334486.
Full textMcSherry, D. M. "Ionization in ion-atom collisions." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368567.
Full textTurrell, Yvonne. "Grip force adjustments in collisions." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368433.
Full textAgg, Philip James. "Rotational excitation in molecular collisions." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358317.
Full textCooke, Andrew William. "Electronic excitation in molecular collisions." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/12002.
Full textSchönning, Karin. "Meson production in pd collisions /." Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-100786.
Full textPiilo, Jyrki. "Cold collisions in optical lattices." Helsinki : University of Helsinki, 2002. http://ethesis.helsinki.fi/julkaisut/mat/fysik/vk/piilo/.
Full textVosskuhle, Michel. "Particle collisions in turbulent flows." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2013. http://tel.archives-ouvertes.fr/tel-00946618.
Full textLi, Bo. "Inelastic collision and three-body recombination." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29779.
Full textCommittee Chair: M. Raymond Flannery; Committee Member: Daniel Goldman; Committee Member: Dewey H. Hodges; Committee Member: Li You; Committee Member: Turgay Uzer. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Jutzi, Martin. "Studies of collisions involving porous bodies /." [S.l.] : [s.n.], 2009. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Full textTriana, Iglesias Miquel. "Holographic collisions and non-conformal dynamics." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/460684.
Full textLa cromodinàmica quàntica (QCD), la teoria que descriu la força nuclear forta, és cas paradigmàtic de teoria quàntica de camps amb fases fortament acoblades. Amb l'objectiu d'entendre en profunditat la QCD i la seva dinàmica, és va iniciar a la dècada de 1970 el programa de col·lisions de ions pesants. Aquest programa experimental té com a objectiu crear, mitjançant acceleradors de partícules, fases de QCD de-confinades i estudiar-ne les seves propietats. Entre els formalismes utilitzats per a descriure sistemes fortament acoblats, com les col·lisions d'ions pesants, hi ha la dualita “gauge/string” o holografia. L'holografia és una correspondència entre dues teories -- una teoria gauge i una teoria de cordes -- que permet fer càlculs en una de les dues teories per mitjà de la seva dual. La correspondència es pot fer servir per relacionar un plasma fortament acoblat i el seu dual, forats negres en un espai asimptòticament anti-de-Sitter (AdS), on els càlculs resulten factibles. Així, per simular la col·lisió d'ions pesants s'evoluciona numèricament la col·lisió d'ones gravitatòries en AdS, i la subseqüent relaxació del seu horitzó d'esdeveniments. En aquesta tesi s'hi presenten un seguit de treballs emmarcats en el camp de l'holografia aplicada, on s'hi considera dinàmica en models més enllà de gravetat pura. En el capítol 2 es presenta la primera simulació hologràfica de col·lisions amb càrrega bariònica, un observable accessible en els experiments. Els capítols 3, 4 i 5 estan dedicats a una família de models no conformes. En el capítol 3 se n'estudia la dinàmica prop de l'equilibri per mitjà dels modes quasi-normals. En el capítol 4 s'hi estudien col·lisions hologràfiques. Finalment en el capítol 5 es genera una inestabilitat espinoidal en un model amb transició de fase i se segueix fins a un estat final inhomogeni.
Vrinceanu, Daniel. "Quantal-classical correspondence in atomic collisions." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/28035.
Full textWu, Xin 1967. "Probing colloidal forces with surface collisions." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40469.
Full textBased on the CPS principles, we have built a force apparatus called "microcollider". It successfully determined the van der Waals forces and the electrostatic force between two 5 $ mu$m latex spheres at different salt concentrations. A "hairy" latex model was introduced to explain the measured van der Waals forces which are weaker than those predicted by theory assuming smooth latex surfaces. This is consistent with other experimental findings about the surfaces of latex particles.
A similar "hairy" model was applied to determine the adsorption layer thicknesses of two triblock copolymers adsorbed on latex particles. The results show that the configuration of the buoy block composed of polyethylene oxide (PEO) is more extended than a random PEO coil, which agrees with theoretical predictions. Moreover, excellent quantitative agreement between the adsorption layer thicknesses determined by CPS and other methods has been found.
Dynamic steric interactions between two high molecular weight PEO adlayers have also been studied. Both the elastic modulus and the adsorption layer thickness were determined. The results show that a thick layer has a lower elastic modulus than a thin one composed of the same polymer. This implies that an extended loop/tail structure in a thick layer is less stiff than a flat compact one in a thin layer, which is consistent with theory.
In addition, the microcollider can accurately determine particle-wall interactions as well. A rather weak electrokinetic lift force was measured. The results are in good agreement with the solutions rigorously derived from two new theories.
Hughes, Timothy John. "Luminescent collisions of energetic manganese atoms." Thesis, Northumbria University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262819.
Full textMcLeod, Andrew. "Instabilities in supersonic cloud-cloud collisions." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/38842/.
Full textNewell, Catherine A. "INELASTIC COLLISIONS IN COLD DIPOLAR GASES." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/30.
Full textGlover, Edward William Nigel. "Studies of high energy pp collisions." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/7113/.
Full textHughes, Ian G. "Electron ion and ion-ion collisions." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335410.
Full textBradley, J. P. "Charge transfer during ion-atom collisions." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426960.
Full textSegura-Sanchez, Mararita. "Collisions in a stream of drops." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364298.
Full textBarry, N. J. "Molecular beam studies of reactive collisions." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375059.
Full textTruhins, Kaspars. "Stereodynamics of asymmetric rotor - atom collisions." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363381.
Full textMoores, John Demeritt. "Collisions of orthogonally polarized solitary waves." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14420.
Full textIncludes bibliographical references.
Support from the Office of Naval Research in the form of a 1986-1989 ONR Fellowship.
by John Demeritt Moores.
M.S.
Côté, Joseph Noël Robin. "Ultra-cold collisions of identcial atoms." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32632.
Full textObisesan, Abayomi. "Stochastic damage modelling of ship collisions." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231845.
Full textPons, Bernard. "Collisions ion-atome aux énergies intermédiaires." Bordeaux 1, 1994. http://www.theses.fr/1994BOR10612.
Full textLévêque, Sandrine. "Collisions ions surfaces. Effets initiaux d'oxydation." Paris 11, 1994. http://www.theses.fr/1994PA112387.
Full textLidström, Olof, and Oscar Edling. "Injury prevention in vehicle side collisions." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276669.
Full textI USA orsakas cirka 30\% av alla trafikdödsfall av sidokollisioner. I Europa är motsvarande siffra mellan 28% och 38%. Vidare rapporterar Shanghai United Road Traffic Safety Scientific Research Center (SHUFO) att mer än hälften av dödsfallen vid sidokollisioner är till följd av huvud och nackskador. Det finns befintliga skyddssystem för att minimera risken för huvud och nackskador vid dessa typer av kollisioner. Vanligtvis används airbags konfigurationerna kombinationssystem (combo) eller gardinsystem (IC). En kombinationssystem utlöses framåt från ryggstödet för att skydda passagerarens överkropp. För att skydda huvudet använder detta system en tilläggskudde, som vecklas ut från den sätesmonterade kudden upp mot huvudet. Nackdelen med detta system är systemet har begränsat täckningsområde. Gardinlösningar fungerar vanligtvis i tandem med en sätesmonterad krockkudde, vilket skyddar passagerarnas överkropp, likt kombinationssystemet. Gardinlösningen skyddar huvudet genom en uppblåsbar gardin som utlöses längs fordonets innervägg. Till skillnad från kombinationssystemet har ett gardinsystem förmågan att täcka en större yta. Nackdelen är dock att denna befinner sig längre bort från passagerna, vilket tillåter huvudet att röra sig relativt överkroppen. I denna rapport jämfördes kombinations- och gardinsystemen. En övergripande jämförelse gjordes med hjälp av data från Euro NCAP. Resultatet av denna jämförelse visade att kombinationssystemet ger något bättre skydd för huvudet i en kollision riktad 90 grader från sidan, medan gardinlösningen erbjuder bättre skydd för bröstkorgen då kollisionen är vinklad. Pisksnärtsskador (Whiplash) är den vanligaste trafikskadan i Sverige. Värt att notera är dock att dessa sällan har dödlig utgång. De flesta whiplash-skador uppstår vid kollisioner bakifrån, då huvudet rycker tillbaka. Denna rörelse kan inträffa även vid sidokollisioner, vilket innebär att även dessa typer av kollisioner kan resultera i pisksnärtsskador. En jämförelse mellan piskssnärtskade-effekten hos gardinsystemet och kombinationssystemet gjordes med hjälp av accelerometerdata som erhållits från NHTSA:s databas och en modifierad implementering av NIC-kriteriet. Resultaten indikerade att det finns en risk för whiplash-skador vid sidokollisioner och att olika bilar har olika förutsättningar för att passagerarna ska drabbas av dessa typer av skador. Ett definitivt svar på vilket av krockkuddesystemen som erbjuder bäst skydd mot pisksnärtsskador kunde inte finnas med den erhållna datan.\\
Tan, Jonathan S. "Compiler Optimization Effects on Register Collisions." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1841.
Full textXia, Jianjun. "Finite Element Analysis of Ship Collisions." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34133.
Full textMaster of Science
Daniello, Allison Louise. "Injury Mechanisms in Roadside Motorcycle Collisions." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/20381.
Full textThe likelihood of serious or fatal injury in barrier crashes was significantly influenced by both barrier type and rider trajectory after striking the barrier. A national study of motorcyclist fatality risk using the Fatality Analysis Reporting System (FARS) and General Estimates System (GES) showed that crashes with guardrail than crashes were about 7 times more likely to be fatal than those with the ground, based on the most harmful event reported. An analysis of 1,000 riders in barrier crashes in three states showed that the odds of serious injury were 1.4 times greater in guardrail crashes than in concrete barrier crashes. These analyses did not take into account the trajectory of the rider after striking the barrier, since this was unknown. The police accident report for 350 barrier crashes in New Jersey was used to determine the rider trajectory in those crashes. Being ejected from the motorcycle after impacting the barrier significantly increased the odds of serious injury over crashes where the rider was not ejected.
While providing insight into factors influencing injury severity, these analyses do not provide an understanding of the nature of injuries incurred in these crashes. To further understand how injuries were caused in motorcycle-barrier crashes, we developed a methodology for determining injury mechanisms in motorcycle-barrier collisions. Using this methodology, we investigated 9 serious motorcycle-to-barrier crashes. In these crashes, as well as in an analysis of 106 barrier crashes in Maryland, the thorax and lower extremities most commonly suffered serious injury. Of particular concern are the posts and top of the rail, both of which can lead to lacerations and blunt trauma.
Ph. D.
Pandit, Yadav. "AZIMUTHAL ANISOTROPY IN HEAVY ION COLLISIONS." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1353871180.
Full textTaliotis, Anastasios Socrates. "Geometrical Methods in Heavy Ion Collisions." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1285088429.
Full textChao, Megan(Megan C. ). "Physically accurate collisions in StarLogo Nova." Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/130683.
Full textCataloged from the official PDF of thesis.
Includes bibliographical references (page 56).
StarLogo Nova is a blocks-based programming language for students that helps teach programming by allowing users to model their own physical simulations and create games. In many simulations and games, it may be useful to have physically accurate elastic, inelastic, or partially inelastic collisions. However, StarLogo's current collision detection system relies on detecting overlapping objects after they have already collided, so it cannot simulate such collisions. We create a new continuous-time collision detection algorithm which computes the exact time two objects collide and processes collisions in time order. To verify it is possible to add physically accurate collisions to StarLogo using this algorithm, we test the continuous collision algorithm in the GlowScript, using elastic, inelastic, and partially elastic collision behavior. The new algorithm can be integrated into the execution model and new blocks can be added for different types of physically accurate collisions in order to bring accurate collisions to StarLogo.
by Megan Chao.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science