Relevant bibliographies by topics / Impact phenomena

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Impact phenomena'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Impact phenomena"

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Charlton, M., and G. Laricchia. "Positron impact phenomena." Journal of Physics B: Atomic, Molecular and Optical Physics 23, no. 7 (April 14, 1990): 1045–78. http://dx.doi.org/10.1088/0953-4075/23/7/004.

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Nicholson, Philip D. "Earth-based observations of impact phenomena." International Astronomical Union Colloquium 156 (May 1996): 81–109. http://dx.doi.org/10.1017/s0252921100115465.

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Earth-based observations at near- and mid-infrared wavelengths were obtained for at least 15 of the SL9 impacts, ranging from the spectacular G, K and L events to the barely-detected N and V impacts. Although there were a few exceptions, most of the IR lightcurves fit a common pattern of one or two relatively faint precursor flashes, followed several minutes later by the main infrared event as the explosively-ejected plume crashed down onto the jovian atmosphere. Correlations with the impact times recorded by the Galileo spacecraft and plumes imaged by the Hubble Space Telescope lead to an interpretation of the twin precursors in terms of (i) the entry of the bolide into the upper atmosphere, and (ii) the re-appearance of the rising fireball above Jupiter's limb. Positive correlations are observed between the peak IR flux observed during the splashback phase and both pre-impact size estimates for the individual SL9 fragments and the scale of the resulting ejecta deposits. None of the fragments observed to have moved off the main train of the comet by May 1994 produced a significant impact signature. Earth-based fireball temperature estimates are on the order of 750 K, 30-60 sec after impact. For the larger impacts, the unexpectedly protracted fireball emission at 2.3 μm remains unexplained. A wide range of temperatures has been inferred for the splashback phase, where shocks are expected to have heated the re-entering plume material at least briefly to several thousand K, and further modelling is required to reconcile these data.
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Beuhler, R., and L. Friedman. "Larger cluster ion impact phenomena." Chemical Reviews 86, no. 3 (June 1986): 521–37. http://dx.doi.org/10.1021/cr00073a003.

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McBride, J. W., and S. M. Sharkh. "Electrical contact phenomena during impact." IEEE Transactions on Components, Hybrids, and Manufacturing Technology 15, no. 2 (April 1992): 184–92. http://dx.doi.org/10.1109/33.142893.

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Langford, M. L. "Physics of Ion Impact Phenomena." International Journal of Mass Spectrometry and Ion Processes 123, no. 2 (February 1993): 167. http://dx.doi.org/10.1016/0168-1176(93)87010-p.

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Holsapple, Keith A. "The scaling of impact phenomena." International Journal of Impact Engineering 5, no. 1-4 (January 1987): 343–55. http://dx.doi.org/10.1016/0734-743x(87)90051-0.

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YAMAMURA, Yasunori. "Computer Simulations of Cluster Impact Phenomena." SHINKU 35, no. 8 (1992): 699–707. http://dx.doi.org/10.3131/jvsj.35.699.

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Liu, Jie, Henry Vu, Sam S. Yoon, Richard A. Jepsen, and Guillermo Aguilar. "SPLASHING PHENOMENA DURING LIQUID DROPLET IMPACT." Atomization and Sprays 20, no. 4 (2010): 297–310. http://dx.doi.org/10.1615/atomizspr.v20.i4.30.

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Holian, Brad Lee. "Hypervelocity-impact phenomena via molecular dynamics." Physical Review A 36, no. 8 (October 1, 1987): 3943–46. http://dx.doi.org/10.1103/physreva.36.3943.

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Wingate, C. A., R. F. Stellingwerf, R. F. Davidson, and M. W. Burkett. "Models of high velocity impact phenomena." International Journal of Impact Engineering 14, no. 1-4 (January 1993): 819–30. http://dx.doi.org/10.1016/0734-743x(93)90075-i.

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Dissertations / Theses on the topic "Impact phenomena"

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Murtagh, Daniel James. "Positron impact ionization phenomena." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1446030/.

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In the present work, a beam of positrons, obtained from a radioactive source (MNa) in conjunction with a W moderator and guided by a magnetic field, has been used to investigate low energy positron-impact ionization phenomena from atomic and molecular targets. For He below threshold, the investigation discovered vacuum contaminants in creased with gas load and hence concluded that the high 7-ray/ion signal observed by Szluinska and Laricchia (2004a) in Ne could not be safely attributed to annihila tion. A detailed measurement of the total ionization cross-section for He has been performed from below threshold for Ps formation to high energy. Combined with previously measured data and previously measured direct ionization cross-sections (Moxom et al 1996, Ashley et al 1996), a new determination of the positronium formation cross-section has been achieved and compared to other available experi mental measurements and theoretical calculations. Measurements of the excited state (n > 1) positronium formation cross-section for He and Ar have been performed and compared to available theoretical calcu lations. This work has been motivated both for a direct comparison with theory and to test the hypothesis that structure observed in the total (all n) positron ium formation cross-sections for the heavier noble gases, is due to excited state positronium formation (Laricchia et al 2002). The present study is unable to verify fully this hypothesis due to the experimental methods insensitivity to positronium formation in to the 2S or n > 2 states. However, the present results are close to the most sophisticated theoretical calculation of positronium formation into the 2P state (Campbell et al 1998).
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Wainwright, Raymond Geoffrey. "How do phenomena diagnosed as mental illness impact upon personal identity?" Thesis, Sheffield Hallam University, 2010. http://shura.shu.ac.uk/20832/.

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The central question of this study was to ascertain how phenomena diagnosed as mental illness impacted upon sense of personal identity. To facilitate the necessary research, the aims of this study were to examine the experience of mental illness from the perspective of service users. Nine adult respondents (five men, four women) participated in a series of unstructured interviews, each lasting approximately one and a half hours. Some respondents were interviewed twice. Data from the interviews were transcribed by the researcher and subjected to four levels of analysis. Of these levels, the first was the act of transcription, the second conclusions following same, the third close scrutiny of the transcribed document, and the fourth deconstruction into 'idea units'. Integral to this exercise was the use of narrative theory to develop concepts of the respondents' personal narratives with particular reference to the respondents' mental health narratives. Following the four levels of analysis, the personal narratives of the respondents were compared and contrasted in a cross-case analysis. With reference to narrative models developed for the specific purpose of this study, the conclusion was drawn that initial experience of mental illness has a profound effect upon the personal narrative. Thereafter, the resultant impact upon personal identity is influenced by a combination of personal and environmental factors. Some of these may lead to a re-evaluation of past experiences and associated understanding. Accordingly, the outcome of the illness experience may not necessarily be negative, but may be positive by virtue of insights gained. Implications for mental health practice and further research, including the personalisation agenda, are considered.
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Loken, Zach. "Law Enforcement Seat Belt Use: Impact of Policy and Phenomena on Use." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7402.

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Studies show that seat belt use by law enforcement officers is estimated to be at 50%, well below the national average. The purpose of this study was to explore what may be leading to reduced seat belt use by law enforcement patrol officers while also determining if different types of policies effect the level of seat belt usage by this population. The theoretical framework used in this study was Shafritz, Ott and Jang's theory of organizational culture and change. This quantitative study was conducted using a casual, quasi-experimental design; the research questions focused on understanding what phenomena may be occurring resulting in the lower seat belts by U.S. police patrol officers and what types of policies are resulting in increased seat belt usage by this population. Participants in this research consisted of 38 officers from police departments with patrol divisions. These departments were selected from the Phoenix Metropolitan Area. The research indicated that officers may have false perceptions in regard to seat belt use. Trainings should be delivered to debunk some of these myths while also providing practical seat belt use training. The results of this study can be used to develop better policies to increase seat belt usage by law enforcement officers, which would likely reduce the injuries and death as a result of auto accidents. Decreased injuries and deaths of law enforcement officers would lead to decreased insurance and workers' compensation claims that would reduce the tax and financial burden faced by citizens and jurisdictions.
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Daou, Maya Mounir. "Investigation of the plate-impact method as a precursor of physical phenomena and chemical processes." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066245/document.

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Ce manuscrit a pour but d'étudier un nouveau dispositif générateur de cavitation dont le potentiel favorable à l'intensification de réactions chimiques est évalué. Ce dispositif est constitué d'une plaque mobile qui frappe un liquide contenu dans un réacteur. L'impact génère une forte augmentation de pression dans le milieu suivi d'une dépressurisation. Nous montrons que la couche de gaz/vapeur piégée entre le piston et la surface du liquide influence les pics de pression et les fréquences générées dans le milieu. La visualisation à l'aide d'une caméra rapide montre que la dépressurisation active les sites de nucléation à l'origine des bulles de cavitation qui grandissent et implosent en générant occasionnellement des jets de grande vitesse. Nous étudions aussi la réponse de bulles préexistantes. Nous identifions un rayon de bulle critique qui dépend de la hauteur d'impact, de la pression extérieure et des caractéristiques du piston. Les bulles dont le rayon initial est supérieur à la valeur critique implosent au moment de l'impact, tandis que les petites bulles ne sont activées qu'après (sous tension). Des évolutions de pression différentes sont observées après l'impact en fonction de la présence/absence de grandes bulles. Nous étudions enfin l'oxydation du phénol en montrant que l'impact sur l'eau pure est incapable de générer des espèces radicalaires responsables de la dégradation. En ajoutant du peroxyde d'hydrogène comme oxydant, la molécule est décomposée sous certaines conditions. En général, la quantité d'oxydant requise pour déclencher une oxydation significative diminue lors de l'augmentation de l'intensité de l'impact sur lequel dépend le taux de dégradation
This manuscript aims at characterizing a new device based on a plate impact on a liquid surface to generate cavitation and evaluate its potential to induce chemical reactions. The device is composed of a reactor containing a liquid that a piston hits due to pressure difference. This impact generates a strong and uniform pressure increase in the medium followed by a depressurization. We show that the gas/vapor layer trapped between the piston and the liquid free surface influences the pressure peaks and frequencies generated in the medium. High-speed camera visualization shows that depressurization activates nucleation sites leading to bubble appearance in the solution. Bubbles expand and collapse intensively generating high velocity jets under some conditions. We also investigate the response of pre-existing bubbles. We identify a critical bubble radius that depends on the impact height, external pressure and piston’s characteristics. Bubbles with an initial radius larger than the critical one collapse at the moment of impact while smaller bubbles are only activated after it (under tension). Significant differences are observed in the pressure recordings after the impact depending on the presence/absence of large bubbles. We finally study the oxidation of phenol. We show that impacting on pure water is incapable of generating radical species responsible of the degradation. By adding hydrogen peroxide as an oxidant we show that the molecule is decomposed under certain conditions. In general, the amount of hydrogen peroxide required to initiate a significant oxidation decreases when increasing the intensity of the impact on which the degradation rate mainly depends
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Nadian, Behrooz. "A unified tribological model for different regimes of lubrication and rub/impact phenomena in rotor dynamics." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1061913573.

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Jaeschke, Benedict. "Exploring phenomena that affect the fate and impact of radioactive materials in the blue mussel." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-83404.

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Current protection of the marine environment from radiation is based largely on measuring, estimating and modelling accumulation and impact(s) of radionuclides in a few marine species. Using a relevant marine organism, this thesis focusses on investigating some poorly described phenomena that could cause deviations from predicted measurements. Paper I investigated the biological transformation of tritium (radioactive hydrogen) into an organic compound. The resulting organically bound tritium (OBT) showed increased accumulation in mussels, unique incorporation into a key biological molecule (DNA), extended persistence in tissues, and greater toxicity than the inorganic form. Paper II demonstrated significant disparity in OBT accumulation between functionally similar microalgae species and that OBT in algae is readily transferred to a consumer. Highly radioactive particles are a complex issue in radioecology due to their concentrated dose geometry, potentially inducing very different impacts in organisms, compared to external irradiation. Paper III developed a method to introduce radioactive particles that would facilitate their recovery, improve dose-calculation, and aid the measurement of toxicological endpoints. It also showed that such particles can be incorporated into mussel tissues, causing significant effects. In Paper IV, hypoxia – another major ecological hazard in the marine environment – was expected to reduce radiosensitivity. The minimal observable effect from radiation prevented identification of such an interaction, and indicates drawbacks in the (otherwise sensitive) endpoints used. It appears that stressors like hypoxia may be more of a health hazard to marine organisms than environmental levels of ionising radiation. By understanding such causes of variation in accumulation and impact, it is possible to improve risk assessment, providing more justification for regulations chosen and minimising conservatism in setting environmental standards.

At the time of doctoral defense, the following papers were not published and had a status as follows: Paper 3: Manuscript. Paper 4: Manuscript.

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Adamović, Dragan. "Molecular dynamics studies of low-energy atom impact phenomena on metal surfaces during crystal growth /." Linköping : Department of Physics, Chemistry and Biology, Linköpings universitet, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7165.

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Chen, S. "An experimental investigation of drop impact phenomena with complex fluids on heated and soft surfaces." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3011893/.

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The present thesis is the result of a four year experimental research, which aims at studying the impact of non-Newtonian droplets (i.e., droplets of complex fluids such as polymer solutions) on heated surfaces (i.e., surfaces with a temperature above the Leidenfrost point) and soft surfaces (i.e., surfaces that undergo temporary or permanent deformations upon drop impact) through high-speed imaging. In the first year we focused on the Leidenfrost drop impact of different model fluids with matching flow curves. We demonstrate that the total kinetic energy carried by low-viscosity Newtonian drops during retraction is partly transformed into rotational kinetic energy rather than dissipated (published on Physical Review E, 2016). In the second year we extended the Leidenfrost drop impact experiment to viscoplastic fluids. The results show that the main contribution to drop rebound is due to surface forces rather than the elasticity of vapour cushion (published on Soft Matter, 2016). A systematic investigation on the impact of viscoplastic drops onto viscoplastic substrates was carried out in the third year. It is shown that the yield stress magnitude of drop/substrate strongly affects the final shape of the impacting drop (published on Soft Matter, 2017). The fourth year was devoted to the drop impact on spherical elastic surfaces. The dynamic contact angle measured using a novel digital image processing scheme is found to be significantly affected by the impact parameters and a quantitative estimation of the deformation energy is proposed (published on Physics of Fluids, 2017).
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Adamovic, Dragan. "Molecular Dynamics Studies of Low-Energy Atom Impact Phenomena on Metal Surfaces during Crystal Growth." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7165.

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It is a well-known fact in the materials science community that the use of low-energy atom impacts during thin film deposition is an effective tool for altering the growth behavior and for increasing the crystallinity of the films. However, the manner in which the incident atoms affect the growth kinetics and surface morphology is quite complicated and still not fully understood. This provides a strong incentive for further investigations of the interaction among incident atoms and surface atoms on the atomic scale. These impact-induced energetic events are non-equilibrium, transient processes which complete in picoseconds. The only accessible technique today which permits direct observation of these events is molecular dynamics (MD) simulations. This thesis deals with MD simulations of low-energy atom impact phenomena on metal surfaces during crystal growth. Platinum is chosen as a model system given that it has seen extended use as a model surface over the past few decades, both in experiments and simulations. In MD, the classical equations of motion are solved numerically for a set of interacting atoms. The atomic interactions are calculated using the embedded atom method (EAM). The EAM is a semi-empirical, pair-functional interatomic potential based on density functional theory. This potential provides a physical picture that includes many-atom effects while retaining computational efficiency needed for larger systems. Single adatoms residing on a surface constitute the smallest possible clusters and are the fundamental components controlling nucleation kinetics. Small two-dimensional clusters on a surface are the result of nucleation and are present during the early stages of growth. These surface structures are chosen as targets in the simulations (papers I and II) to provide further knowledge of the atomistic processes which occur during deposition, to investigate at which impact energies the different kinetic pathways open up, and how they may affect growth behavior. Some of the events observed are adatom scattering, dimer formation, cluster disruption, formation of three-dimensional clusters, and residual vacancy formation. Given the knowledge obtained, papers III and IV deal with growth of several layers with the aim to study the underlying mechanisms responsible for altering growth behavior and how the overall intra- and interlayer atomic migration can be controlled by low-energy atom impacts.

On the day of the defence date the status of article II was Accepted.

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Uechi, Risa. "Modeling of Biological and Economical Phenomena Based on Analysis of Nonlinear Competitive Systems." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199432.

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Books on the topic "Impact phenomena"

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Mathur, Deepak, ed. Physics of Ion Impact Phenomena. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84350-1.

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van, Goudoever Hans, Guandalini Stefano, Kleinman Ronald E, and S. Karger (Firm), eds. Early nutrition: Impact on short- and long-term health. Basel: Karger, 2011.

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International Symposium on Explosion, Shock Wave & High-Energy Reaction Phenomena (3rd 2010 Seoul, Korea). Explosion, shock wave and high energy reaction phenomena: Selected, peer reviewed papers from International Symposium on Explosion, Shock wave & High-energy reaction Phenomena 2010 (3rd ESHP Symposium), 1-3 September 2010, Seoul National University, Seoul, Korea. Stafa-Zurich, Switzerland: Trans Tech Publications, 2011.

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Kelkar, Ajit Dhundiraj. Analyses of quasi-isotropic composite plates under quasi-static point loads simulating low-velocity impact phenomena. Norfolk, Va: Old Dominion University, 1985.

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Laursen, Tod A. Computational Contact and Impact Mechanics: Fundamentals of Modeling Interfacial Phenomena in Nonlinear Finite Element Analysis. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003.

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Computational contact and impact mechanics: Fundamentals of modeling interfacial phenomena in nonlinear finite element analysis. Berlin: Springer, 2002.

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P, Staudhammer Karl, Murr Lawrence Eugene, and Meyers Marc A, eds. Fundamental issues and applications of shock-wave and high strain-rate phenomena: Proceedings of the 2000 International Conference on Fundamental Issues and Applications of Shock-Wave and High-Strain-Rate Phenomena (EXPLOMET '2000). New York: Elsevier, 2001.

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Murgatroyd, Chris. The power of the gene: The origin and impact of genetic disorders. New York: Nova Science Publishers, 2010.

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Murgatroyd, Chris. The power of the gene: The origin and impact of genetic disorders. New York: Nova Science Publishers, 2010.

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Jackson, Robert. The last Black mecca, hip hop: A Black cultural awareness phenomena and its impact on the African-American community. Chicago, IL: Research Associates, 1994.

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Book chapters on the topic "Impact phenomena"

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Cudnik, Brian. "Possible Impact Phenomena (PIPs)." In Astronomers' Observing Guides, 35–70. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-0324-2_4.

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Prosperetti, Andrea. "Drop-Liquid Impact Phenomena." In Drop-Surface Interactions, 25–37. Vienna: Springer Vienna, 2002. http://dx.doi.org/10.1007/978-3-7091-2594-6_2.

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Rein, Martin. "Wave Phenomena During Droplet Impact." In IUTAM Symposium on Waves in Liquid/Gas and Liquid/Vapour Two-Phase Systems, 171–90. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0057-1_14.

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Tan, Y. S., S. P. Chiew, Z. Yang, Zainab Ismail, Felicia Goh, Christopher Lim, Vincent Sih, Ee Ping Yu, and Goh Boon Cheng. "Electrical Impact of Various Arsenic-Residues Cleanings." In Solid State Phenomena, 23–26. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-46-9.23.

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Fang, Qin, and Hao Wu. "Projectile Impact Phenomena and Existing Studies." In Concrete Structures Under Projectile Impact, 9–31. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3620-0_2.

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Goh, Boon Cheng, Felicia Goh, Christopher Lim, Zainab Ismail, and Mei Sheng Zhou. "Impact of Re-Gasified Water on Megasonic Cleaning." In Solid State Phenomena, 217–20. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-46-9.217.

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Kazantsev, S. A., A. G. Petrashen, and N. M. Firstova. "Impact Spectropolarimetric Diagnostics of Nonthermal Phenomena in the Solar Atmosphere." In Impact Spectropolarimetric Sensing, 287–343. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4839-3_13.

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Gaudin, G., Frédéric Cayrel, Corrado Bongiorno, Robert Jérisian, Vito Raineri, and Daniel Alquier. "Impact of Hydrogen Implantation on Helium Implantation Induced Defects." In Solid State Phenomena, 309–14. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/3-908451-13-2.309.

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Lee, Sang Yul. "Impact and Indentation Resistance of Superhard AlCrN Thin Films." In Solid State Phenomena, 1609–12. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1609.

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Haase, Vera, Gudrun Bär, Lieselotte Berg, Gerhard Czack, Dieter Gras, and Elisabeth Koch-Bienemann. "Optical Properties. Emission and Impact Phenomena." In Be Beryllium, 105–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-10320-3_3.

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Conference papers on the topic "Impact phenomena"

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McBride, J., and S. Sharkh. "Electrical contact phenomena during impact." In Electrical Contacts - 1991 Proceedings of the Thirty-Seventh IEEE HOLM Conference on Electrical Contacts. IEEE, 1991. http://dx.doi.org/10.1109/holm.1991.170814.

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SCHONBERG, WILLIAM, and ROY TAYLOR. "Analysis of oblique hypervelocity impact phenomena." In Advanced Marine Systems Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-2370.

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Ohtani, K., D. Numata, T. Kikuchi, M. Sun, and K. Takayama. "Hypervelocity Impact Phenomena at Low Temperatures..." In 56th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.iac-05-b6.4.09.

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Winterberg, F. "On impact fusion." In LASER INTERACTION AND RELATED PLASMA PHENOMENA. ASCE, 1997. http://dx.doi.org/10.1063/1.53519.

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ZINN, JOHN. "METEOR IMPACT HAZARDS AND SOME METEOR PHENOMENA." In International Seminar on Nuclear War and Planetary Emergencies 36th Session. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812709233_0040.

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Rossi, Daniele, Martin Omaña, Cecilia Metra, and Alessandro Paccagnella. "Impact of Aging Phenomena on Soft Error Susceptibility." In 2011 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT). IEEE, 2011. http://dx.doi.org/10.1109/dft.2011.45.

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Lee, Young S., Francesco Nucera, Alexander F. Vakakis, D. Michael McFarland, Lawrence A. Bergman, Adolfo Santini, and Nicola Moraci. "Targeted Energy Transfer Phenomena in Vibro-Impact Oscillators." In 2008 SEISMIC ENGINEERING CONFERENCE: Commemorating the 1908 Messina and Reggio Calabria Earthquake. AIP, 2008. http://dx.doi.org/10.1063/1.2963762.

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Kim, V. V. "3D Computer Modeling of High-Velocity Impact Phenomena." In SHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2006. http://dx.doi.org/10.1063/1.2263329.

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Chang, Shang-Chou, Gu-Wei Jian, Sheng-Han Huang, To-Sing Li, and Tien-Chai Lin. "Some special phenomena observed from in-line sputtered aluminum doped zinc oxide films." In 2010 5th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2010. http://dx.doi.org/10.1109/impact.2010.5699513.

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Vasconcellos, Rui M. G., and Abdessattar Abdelkefi. "Phenomena and Bifurcation Analysis of an Aeroelastic System With Impact Effects." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35141.

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Impacts can happen in real aircraft movable surfaces, such as ailerons, flaps, rudder, elevators, trim tabs among others secondary control surfaces leading to complex, dangerous and unpredictable transitions. In a real mechanism, impacts can occur when the surface displacement increases and then regions of higher stiffness or impacts can take place. Abrupt transitions from LCO to chaos and secondary complex transitions are directly related with the discontinuous nature of impact systems, these abrupt transitions caused by impacts are different from the well-known routes to chaos. In this work, numerical simulations generate the data basis for the analysis of a two degrees of freedom aeroelastic wing with a nonlinearity in the pitch stiffness simulating an impact at higher angles. The objective is to characterize the behavior of this system with parametric variation and understand the mechanisms related to the observed bifurcations.
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Reports on the topic "Impact phenomena"

1

Lambrakos, S. G., and N. E. Tran. Inverse Analysis of Cavitation Impact Phenomena on Structures. Fort Belvoir, VA: Defense Technical Information Center, July 2007. http://dx.doi.org/10.21236/ada471244.

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Winkler, S. Wave and Fracture Phenomena in Impacted Ceramics. Fort Belvoir, VA: Defense Technical Information Center, February 1988. http://dx.doi.org/10.21236/ada192946.

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Rao, M., and J. R. Keiser. Studies of near-surface phenomena and erosion mechanisms in metallic alloys using single- and multi-particle impacts. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/5237166.

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Campa, Jose Manuel, and Linda Goldberg. Exchange Rate Pass-Through into Import Prices: A Macro or Micro Phenomenon? Cambridge, MA: National Bureau of Economic Research, May 2002. http://dx.doi.org/10.3386/w8934.

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Rao, M., and J. R. Keiser. Studies of near-surface phenomena and erosion mechanisms in metallic alloys using single- and multi-particle impacts. Fossil Energy Program. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10148649.

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Baluga, Anthony, and Bruno Carrasco. The Role of Geography in Shaping Governance Performance. Asian Development Bank, December 2020. http://dx.doi.org/10.22617/wps200378.

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This paper demonstrates that good governance in one country can influence governance improvements in neighboring countries and highlights that regional political and economic cooperation can benefit institutional development across borders. Governance has a spatial dimension due to spillovers and resource flows across juridical boundaries. This paper finds that governance in a given country—manifested most clearly through voice and accountability—exhibits a positive relationship with those in neighboring countries. Feedback mechanisms are traced in that any change in the income level of a country can affect its governance performance and also impact the governance scores of neighboring countries. This phenomenon is observed in the “Arab Spring,” “Me Too,” and “Black Lives Matter” cross-border movements
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Bosch, Mariano, Stephanie González, and María Teresa Silva Porto. Chasing Informality: Evidence from Increasing Enforcement in Large Firms in Peru. Inter-American Development Bank, March 2021. http://dx.doi.org/10.18235/0003128.

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Evasion of labor market regulations in middle income countries is systemic. This is generally known as informality. In Latin America, where less than 50% of workers are registered with social security, this is a permanent phenomenon and encompasses a variety of economic realities ranging from subsistence self-employment to evasion of certain regulations including social security contributions. In this study we analyze the role of enforcement in curbing informality in large formal firms in Peru, where informality levels are around 70%. Through the Peruvian National Labor Control Superintendence (SUNAFIL) we randomly sent 697 letters to formal Peruvian firms of more than 50 workers, indicating their obligation to enroll workers in social insurance systems (health and pensions). Two types of letters were sent, one with a deterrence message and one emphasizing the benefits of formalization. One year after the letters were sent, we found a positive and statistically significant effect on the number of workers enrolled in social security (9.8% on average). Only strict deterrence messages had a significant impact, and only in very large firms. This evidence suggests that there is room for improvement in compliance with labor regulations through more proactive monitoring and behavioral tools such as reminders, but effects could be concentrated in the largest firms.
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Shillito, Rose, Markus Berli, and Teamrat Ghezzehei. Quantifying the effect of subcritical water repellency on sorptivity : a physically based model. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41054.

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Soil water wettability or water repellency is a phenomenon that can affect infiltration and, ultimately, runoff. Thus, there is a need to develop a model that can quantitatively capture the influence of water repellency on infiltration in a physically meaningful way and within the framework of existing infiltration theory. The analytical model developed in this study relates soil sorptivity (an infiltration parameter) with contact angle (a direct measure of water repellency) for variably saturated media. The model was validated with laboratory experiments using a silica sand of known properties treated to produce controlled degrees of water repellency. The measured contact angle and sorptivity values closely matched the model‐predicted values. Further, the relationship between the frequently used water drop penetration time test (used to assess water repellency) and sorptivity was illustrated. Finally, the direct impact of water repellency on saturated hydraulic conductivity was investigated due to its role in infiltration equations and to shed light on inconsistent field observations. It was found that water repellency had minimal effect on the saturated hydraulic conductivity of structureless sand. A quantitative model for infiltration incorporating the effect of water repellency is particularly important for post‐fire hydrologic modeling of burned areas exhibiting water repellent soils.
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