Relevant bibliographies by topics / Bullet physics

Contents

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

Academic literature on the topic 'Bullet physics'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Bullet physics"

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ZHENG, LANG, and YI TANG. "ENERGY EXCHANGE OF INTERACTING DISSIPATIVE OPTICAL BULLETS IN DISSIPATIVE SYSTEM." Journal of Nonlinear Optical Physics & Materials 18, no. 03 (September 2009): 457–64. http://dx.doi.org/10.1142/s0218863509004695.

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By using the three-dimensional complex Ginzburg–Landau equation with the cubic-quintic nonlinearity, the energy exchange of stable dissipative optical bullets is investigated for bullets launched with zero velocities and with non-zero velocities numerically in dissipative system. It is found that there are two primary factors in the energy exchange process: (i) the relative phase of dissipative optical bullets, which is crucial for energy exchange between bullets, and (ii) the initial velocities of them, which influence interaction and energy exchange between bullets and external source greatly. In addition, some interesting phenomena accompanied by energy exchange, such as asymmetric lateral deflection, bullet fusion and bullet disappearance, are also demonstrated.
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He, Hantao, Junxing Zheng, Quan Sun, and Zhaochao Li. "Simulation of Realistic Particles with Bullet Physics Engine." E3S Web of Conferences 92 (2019): 14004. http://dx.doi.org/10.1051/e3sconf/20199214004.

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The traditional discrete element method (DEM) uses clumps to approximate realistic particles, which is computationally demanding when simulating many particles. In this paper, the Bullet physics engine is applied as an alternative to simulate realistic particles. Bullet was originally developed for computer games to simulate physical and mechanical processes that occur in the real world to produce realistic game experiences. Physics engines integrate a variety of techniques to simulate complex physical processes in games, such as rigid bodies (e.g., rocks, and soil particles), soft bodies (e.g., clothes), and their interactions. Therefore, physics engines have the capabilities to simulate realistic particles. This paper integrates three-dimensional laser scanner and Bullet to form a realistic particle simulation framework. The soil specimen collapse process is simulated to demonstrate the capability of the proposed framework to simulate realistic particles.
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Kerampran, Corentin, Tomasz Gajewski, and Piotr W. Sielicki. "Temperature Measurement of a Bullet in Flight." Sensors 20, no. 24 (December 8, 2020): 7016. http://dx.doi.org/10.3390/s20247016.

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This study answers a primary question concerning how the temperature changes during the flight of a bullet. To answer the question, the authors performed unique research to measure the initial temperatures of bullet surfaces and applied it to four kinds of projectiles in a series of field experiments. The technique determines the temperature changes on metallic objects in flight that reach a velocity of 300 to 900 m/s. Until now, the tests of temperature change available in the literature include virtual points that are adopted to ideal laboratory conditions using classic thermomechanical equations. The authors conducted the first study of its kind, in which is considered four projectiles in field conditions in which a metallic bullet leaves a rifle barrel after a powder deflagration. During this process, heat is partly transferred to the bullet from the initial explosion of the powder and barrel-bullet friction. In this case, the temperature determination of a bullet is complex because it concerns different points on the external surface. Thus, for the first time the authors measured the temperatures at different position on the bullet surface. Moreover, the authors showed that basic thermodynamic equations allow for the credible prediction of such behavior if the initial conditions are identified correctly. This novel identification of the initial conditions of temperature and velocity of flying bullets was not presented anywhere else up to now.
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Maknuni, Jauharil, and Sabaruddin. "Construction Meaning of Bude Trieng Toys (Rifles) in Physics: Traditional Toys." Proceeding International Conference on Science and Engineering 3 (April 30, 2020): 705–9. http://dx.doi.org/10.14421/icse.v3.589.

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Physics is closely related to human life, without realizing we have implemented it in daily life such as when working, walking and other activities, not only adults but also children. When talking about physics we definitely think that physics was born from the west. Before the development of the west in the 9th Century AD, Physics was used in society, especially the people of Aceh. It is undeniable that technology has developed more rapidly now. Technology was created to facilitate human affairs. There are innumerable kinds of technologies. One example of a very popular technology is gadgets. Every person uses gadgets with modern technology such as smart phones, Children have now become active consumers in which many electronic products and gadgets make children the target market for their toys. Before the era of sophisticated technology one of the toys chosen by most children was the Bude Trieng (shotgun). Bude Trieng is marked by playing activities both by himself and other peer groups. i is one toy that quite safe and most popular with children. This type of toy is made from bamboo using paper bullets or boh ram. The method of application is insert boh Ram's bullet in the base of the bude trieng, the ram bullet fills the entire circle of the trieng bude hole, the air inside the Bude trieng will automatically be restrained and cannot come out. The air that is held in the middle of the trieng bude will produce pressure when one of the bullets is pushed and will make a sound from the bude trieng. The purpose of this research is to study the construction of the meaning of bude trieng culture in physics. The research method used was a descriptive qualitative research to describe the relationship between the bude trieng and physics.
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ZENG, XIANG, BING TANG, LIANG WANG, PENG KONG, and YI TANG. "ENERGY EXCHANGE IN COLLISIONS BETWEEN TWO DISSIPATIVE OPTICAL BULLETS." Journal of Nonlinear Optical Physics & Materials 22, no. 02 (June 2013): 1350018. http://dx.doi.org/10.1142/s0218863513500185.

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By using the three-dimensional complex cubic-quintic Ginzburg-Landau equation, the energy transfer process is investigated numerically for collisions of two dissipative optical bullets in a dissipative system. For high energy solitons, as a result of energy transfer, one soliton gains energy to generate a double bullet complex, and the other one loses energy can survive in collisional process. In addition, we find that the variations of the bullets velocity show regular properties during mutiple collisions with phase difference.
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Firth, W. J., A. Lord, and A. J. Scroggie. "Optical bullet holes." Physica Scripta T67 (January 1, 1996): 12–16. http://dx.doi.org/10.1088/0031-8949/1996/t67/002.

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Kleppner, Daniel. "Nibbling the Bullet." Physics Today 51, no. 6 (June 1998): 11–13. http://dx.doi.org/10.1063/1.882265.

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Gwynne, Peter. "Nuclear Physics: US labs dodge a budgetary bullet." Physics World 8, no. 7 (July 1995): 6–7. http://dx.doi.org/10.1088/2058-7058/8/7/4.

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Yubin Xian, Xinpei Lu, Yinguang Cao, Ping Yang, Qing Xiong, Zhonghe Jiang, and Yuan Pan. "On Plasma Bullet Behavior." IEEE Transactions on Plasma Science 37, no. 10 (October 2009): 2068–73. http://dx.doi.org/10.1109/tps.2009.2028142.

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Hamilton, D. P. "Physics Facilities Come Under Fire: DOE Bites the Bullet." Science 256, no. 5055 (April 17, 1992): 305. http://dx.doi.org/10.1126/science.256.5055.305-a.

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Dissertations / Theses on the topic "Bullet physics"

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Wen, Zhang. "Doodle Processing System Using Cinder Graphics and Bullet Physics." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-87743.

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This Master Thesis proposes a implementation for a doodle system which can scan hand drawn paper doodles using camera into the system and obtain a painting based on doodles impacting on a canvas in the system. The doodles which are scanned into the system are applied physical effects such as collisions and forces on. The implementation is supported by Cinder Library and Bullet Physics Library The Cinder used in this thesis is an open source C++ library developed by The Barbarian Group. The doodle system uses multiple draw methods and the framework provided by Cinder to build graphic components and a new system in a quick and efficient way. The Bullet Physics Library used in this thesis is a professional open source library for physics simulations. The Bullet is integrated into the doodle system as a component which perform physics simulations on doodles.
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Edhammer, Jens. "Rigid Body Physics for Synthetic Data Generation." Thesis, Linköpings universitet, Informationskodning, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129808.

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For synthetic data generation with concave collision objects, two physics simu- lations techniques are investigated; convex decomposition of mesh models for globally concave collision results, used with the physics simulation library Bullet, and a GPU implemented rigid body solver using spherical decomposition and impulse based physics with a spatial sorting-based collision detection. Using the GPU solution for rigid body physics suggested in the thesis scenes con- taining large amounts of bodies results in a rigid body simulation up to 2 times faster than Bullet 2.83.
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Cherkasov, Stanislav. "Framework integration in practice." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-39782.

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Development of modern software is a challenging task that requires software developers to leverageexisting functionality by means of reusable code structures, libraries, frameworks and middleware. This allows shortening development time and lowering costs, while keeping resulting software competitive, reliable and maintainable.However, developing software based on reuse of existing libraries and frameworks has its own challenges and requires programmers to be aware of the issuesthey might face.This paper discusses common difficultiesfaced by software developers while developing complex software systems based on reusable libraries and frameworks.The issuesare described along with possible solutions and exemplified by a custom UI framework named AxeZ. AxeZ is designed for customized UI development for Android phones and is built on top of OpenGL and Bullet Physics engine.As a result, AxeZ can be consideredan instanceof successfully designed framework, which implements solutions forthe challenges discussed in this paper. It provides an example of reusable framework targeted for wide area of application in UI programming
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Javorka, Marián. "Fyzikální simulace v grafické scéně." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-237058.

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This master's thesis deals with physical simulation of cars. Program is implemented in C++ using OpenSceneGraph and Bullet libraries, which are shortly introduced. The application is implemented as simple racing game for one or two players. Using a simple menu, the user can select a car and the weather, which dramatically affects the handling characteristics of vehicles. Setting weather to random is one of the options leading to a dynamic weather changes during the game. The application takes into account collisions among cars and collisions with the terrain and bars on a racing circuit.
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Klement, Martin. "Fúze procedurální a keyframe animace." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2013. http://www.nusl.cz/ntk/nusl-235456.

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The goal of this work is to create an application, which will combine procedural and keyfram animations with subsequent visualization. Composition of this two different animations techniques is used to animate a virtual character. To combine this two techniques one starts with interpolations from keyframe animation and then enchance them by procedural animations to properly fit into the characters surroundings. This procedural part of animation is obtained by using forward and inverse kinematics. Whole application is written in C++, uses GLM math library for computations and OpenGL and GLUT for final visualization.
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Buzzoni, Michele. "Reinforcement Learning in problemi di controllo del bilanciamento." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15539/.

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Si pone come obiettivo della tesi lo studio di algoritmi di reinforcement learning capaci di istruire un agente ad interagire correttamente con gli ambienti proposti con lo scopo di risolvere i problemi presentati. Nello specifico i problemi verteranno su un argomento comune: il balancing, ovvero problemi legati all'equilibrio. In particolare vengono presentati tre ambienti per il learning: due sono legati al conosciuto “cart-pole problem” in cui l’ambiente è composto da un carrello su cui è posto un palo. L’agente, muovendo il carrello, dovrà mantenere bilanciato il palo impedendo la sua caduta. Questo problema è realizzato in due varianti: una variante semplice in cui il carrello è legato ad un binario e quindi i suoi movimenti sono solo due (avanti, indietro), mentre la seconda variante prevede un ambiente più complesso in cui il carrello è slegato dai vincoli del binario e può quindi muoversi in 4 direzioni diverse. L’ultimo ambiente consiste di un piano quadrato su cui è posta una pallina. Il compito dell’agente è quello di mantenere la pallina sul piano, imparando a muovere opportunamente il piano stesso. Anche questo problema viene trattato in due varianti, una semplice ed una complessa, ma l’ambiente realizzato è il medesimo. Questa tesi presenta quindi due algoritmi per risolvere i problemi appena elencati: un algoritmo di Q-learning con uso di una Q-table per la memorizzazione delle componenti stato-azione e uno di Q-network in cui la Q-table viene sostituita da una rete neurale. Gli ambienti legati ai problemi che verranno affrontati sono realizzati attraverso pyBullet, libreria per la simulazione 3D di corpi solidi che viene integrata con Gym openAI, toolkit per la programmazione in ambito machine learning che offre semplici interfacce per la costruzione di nuovi ambienti.
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Ondrejíček, Marián. "Vizualizace grafických scén v knihovně OGRE." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236611.

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The goal of this thesis is to investigate the possibilities of the OGRE visualization library and to implement an application which utilizes both simple and advanced OGRE features. Furhtermore there are explained basics of creating effects using Cg language and connecting them with OGRE library. The Bullet library which is often used in visualization applications for physics calculations is analyzed as well. The second part describes implementation of the demo application. In the end, the results are discussed, including possibilities of future development.
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Čapek, Radovan. "Manipulace s objekty pomocí p5 glove." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236995.

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The thesis is focused on the description of the basic principles of the virtual reality, on utilization of data gloves in the virtual reality and it implements the application with usage of the input device P5 glove. The implementation contains among the others various visual techniques of OpenGL and also shows up-to-date work with the popular physics engine Bullet Physics. The theoretical bases of these techniques are analysed in the thesis. So the output of the thesis will serve as a source of information to people interested in the knowledge of the data gloves problems and other similar peripherals, but also to interested people who want to learn more about the realization of the computer graphics and creation of physicist models.
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Besson, Sébastien. "Propriétés adhésives entre deux bulles de savon." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2007. http://tel.archives-ouvertes.fr/tel-00172878.

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Cette thèse a pour objet d'étudier les propriétés d'adhésion, statique et dynamique, entre deux bulles de savon. Nous avons réalisé un montage expérimental permettant de mettre au contact deux bulles de composition contrôlée. Dans un premier temps, nous observons et modélisons la déviation statique de l'angle de contact, mesuré par analyse d'images, par rapport à la valeur attendue de 120°. Nous nous concentrons ensuite sur la réponse du système à une excitation sinusoïdale. Des modules angulaires locaux sont définis à partir de l'angle dynamique de contact et de la déformation du rayon de contact et tracés en fonction de la fréquence. Le comportement viscoélastique obtenu est comparée aux modules d'élasticité des films de savon à l'aide d'un modèle microscopique. Les propriétés de la phase liquide sont modulées et l'effet des différents paramètres sur les propriétés de la double bulle est discuté. Enfin, le lien entre ces propriétés locales et la rhéologie macroscopique de mousse est abordé au travers d'une correction au modèle de Princen.
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Huang, Xin. "Generation of Versatile Vortex Linear Light Bullets." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1444754549.

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Books on the topic "Bullet physics"

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Mullarkey, Lisa. TJ zaps the smackdown: Stopping physical bullying. Minneapolis, Minn: Magic Wagon, 2012.

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Rohnke, Karl. Silver bullets: A guide to initiative problems, adventure games, stunts, and trust activities. Hamilton, Mass: Project Adventure, 1988.

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Hildebrandt, Stefan. Mathematics and optimal form. New York: Scientific American Library, 1985.

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Publishing, Physics. It's Physics: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. It's Physics: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. Physics Turns Me On: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. I Nap Periodically: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. I Nap Periodically: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. Science Is Real: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Publishing, Physics. Sin, Square, Triangle, Sawtooth: Dotted Bullet Notebook ~ Simple Physics Notebook for Daily Journal, Diary, and Gift. Independently Published, 2020.

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Book chapters on the topic "Bullet physics"

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Cheng, Bin, Hao Sun, and XiaoPing Chen. "Evolving Honeycomb Pneumatic Finger in Bullet Physics Engine." In Advances in Intelligent Systems and Computing, 411–23. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16841-8_38.

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Shiotani, Tomoki, Satoshi Osawa, Shohei Momoki, and Hiroyasu Ohtsu. "Visualization of Damage in RC Bridge Deck for Bullet Trains with AE Tomography." In Springer Proceedings in Physics, 357–68. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1239-1_33.

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Skvortsov, Dmitry, and Natalia Konobeeva. "Visualization of Three-Dimensional Light Bullets Propagation in Nanotubes Taking into Account the Mechanical Tension and Magnetic Field Using Graphics Processor." In Springer Proceedings in Physics, 537–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58868-7_58.

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"Bullet Physics." In Introduction to Game Physics with Box2D, 247–53. CRC Press, 2013. http://dx.doi.org/10.1201/b14539-16.

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Parberry, Ian. "Bullet Physics." In Introduction to Game Physics with Box2D, 247–53. CRC Press, 2017. http://dx.doi.org/10.4324/9781315380636-12.

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"Bullet Physics: Simulation with OpenCL." In Multithreading for Visual Effects, 161–86. A K Peters/CRC Press, 2014. http://dx.doi.org/10.1201/b17204-12.

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Komaragiri, Satyavati, Alex Gigliotti, Syeda Rahman, and Amit Bhasin. "Asphalt mixture compaction in gyratory compactor using bullet Physics engine." In Advances in Materials and Pavement Performance Prediction II, 287–90. CRC Press, 2020. http://dx.doi.org/10.1201/9781003027362-67.

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Izadi, E., and A. Bezuijen. "Simulation of granular soil behaviour using the Bullet physics library." In Geomechanics from Micro to Macro, 1565–70. CRC Press, 2014. http://dx.doi.org/10.1201/b17395-285.

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Gill, Avtar Singh. "A Brief Study on Bullet Train Physics with Gill’s Electronic Theory of Magnetism 1964." In Newest Updates in Physical Science Research Vol. 10, 1–22. Book Publisher International (a part of SCIENCEDOMAIN International), 2021. http://dx.doi.org/10.9734/bpi/nupsr/v10/9866d.

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de Castro, Leandro Nunes. "Natural Computing." In Encyclopedia of Information Science and Technology, First Edition, 2080–84. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-553-5.ch367.

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There are several artifacts developed by taking inspiration from natural organisms and phenomena. For instance, Velcro was inspired by a plant burr, bullet- proof vests were inspired by spider silk, sonars were inspired by bats, airplanes were motivated by the flying of birds, and the list goes on. The observation of nature has also allowed the development of several laws and theories that describe how parts of nature work; the laws of physics are a great example – laws of thermodynamics (conservation, entropy, and absolute zero); laws of movement (Newton’s laws); laws of electromagnetism (Maxwell’s laws); and others. They are used to explain the trajectories, attraction and other aspects of objects.
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Conference papers on the topic "Bullet physics"

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Coumans, Erwin. "Bullet physics simulation." In SIGGRAPH '15: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2776880.2792704.

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Khalili, Fardin, Federico De Paoli, and Rasim Guldiken. "Impact Resistance of Liquid Body Armor Utilizing Shear Thickening Fluids: A Computational Study." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53376.

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Since the creation of advanced knives and firearms with high rates of speed, safety has always been a vital issue for armed forces. A disadvantage of a regular fabric Kevlar is that, although it has an effective resistance against the impact of low-speed bullets, it reveals its weakness in the case of a stab wound and high-speed bullets. Under these circumstances, a new executable technology of fibers that improves the ballistic performance of the materials utilized in body armors is an essential necessity to build high quality and protective vests which are perfectly bulletproof. The purpose of this study is to investigate the physics and concepts of shear thickening fluids and perform a computational CFD simulation of liquid body armors which consist of a combination of polyethylene glycol liquid and nanoparticles of silica. A model of multiphase flow environment with STFKevlar, as a representative of the non-Newtonian shear thickening fluid (STF), is simulated in STAR-CCM+ in order to analyze the behavior of STFs under impact and performance of novel liquid body armors. In the current simulation, Eulerian multiphase flow and volume of fluid (VOF) are applied to generate three discrete regions and determine the volume fraction of each phase including gas, non-Newtonian liquid and solid which represent air, STFKevlar and bullet, respectively. Moreover, dynamic fluid body interactions (DFBI) and overset mesh are utilized to consider the interactions between the regions and forces applied. In this study, the properties of the bullet are based on characteristics of a regular pistol bullet, and it approaches the STFKevlar with the constant speed of 400 m/s. The results show that the non-Newtonian material is initially at equilibrium state and while the bullet approaches the STFKevlar, it acts like a shear thinning fluid. As a high-speed bullet nears the STFKevlar, it absorbs the significant amount of energy that is applied by the bullet. Consequently, the bullet stops penetrating the STFKevlar in a very small fraction of time due to the considerable increase in viscosity. As the shear rate increases over a certain critical value, viscosity increases remarkably which is the main characteristic of shear thickening transition and finally, it reaches to its maximum value of viscosity in approximately 8 × 10−5sec. In addition, a bullet applies a considerable amount of force on any Kevlar due to its high velocity and kinetic energy; however, the high resistant STFKevlar is approved as a high quality and protective vests which stops the bullet in 6 × 10−4sec.
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Bzhikhatlov, I., and S. Perepelkina. "Research of robot model behaviour depending on model parameters using physic engines bullet physics and ODE." In 2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). IEEE, 2017. http://dx.doi.org/10.1109/icieam.2017.8076483.

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Balamurugan, B., Anil Skariah, G. Nalinipriya, K. G. Maheswari, and Malathi V. "Acceleration of Bullet Physics Physical Simulation Library Using GPU and Demonstration on a Set-Top Box Platform." In the Second International Conference. New York, New York, USA: ACM Press, 2016. http://dx.doi.org/10.1145/2905055.2905266.

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Badillo, Germánico González, Hugo I. Medellín Castillo, Theodore Lim, and Víctor E. Espinoza López. "Physics Engines Evaluation Based on Model Representation Analysis." 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/detc2014-35289.

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Virtual environments (VE) are becoming a popular way to interact with virtual objects in several applications such as design, training, planning, etc. Physics simulation engines (PSE) used in games development can be used to increase the realism in virtual environments (VE) by enabling the virtual objects with dynamic behavior and collision detection. There exist several PSE available to be integrated with VE, each PSE uses different model representation methods to create the collision shape and compute virtual object dynamic behavior. The performance of physics based VEs is directly related to the PSE ability and its method to represent virtual objects. This paper analyzes different freely available PSEs — Bullet and the two latest versions of PhysX (v2.8 and 3.1) — based on their model representation algorithms, and evaluates them by performing various assembly tasks with different geometry complexity. The evaluation is based on the collision detection performance and their influence on haptic-virtual assembly process. The results have allowed the identification of the strengths and weaknesses of each PSE according to its representation method.
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Knox, Michael A. "Forensic Engineering Analysis Methods Employed for the Purpose of Determining the Location of a Long-Range Shooter Based on Terminal Bullet Trajectory." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62517.

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The reconstruction of shooting incidents based on the terminal bullet trajectory is commonly carried out over short distances using a linear trajectory simplification model. However, when shooting incidents, such as sniper attacks, take place over longer distances, linear simplification models destabilize and result in large errors in determining the location of the shooter. In such cases, it becomes necessary to account for a large number of variables affecting the flight path of the bullet. While linear simplification models for bullet trajectories do not require robust engineering analysis methods, reverse modeling of long-range bullet trajectories can only be carried out using numerical methods for solving the differential equations of projectile motion. This paper will explore methods for employing computational engineering methods to model the trajectories of bullets with a focus on reverse modeling from the trajectory terminus. In this way, the forensic engineer can use basic measurements of the terminal angle of the bullet trajectory combined with appropriate knowledge of the firearm and ammunition to model the bullet’s path back to a probable location of the shooter. This paper will focus on methods that the forensic engineer can employ when solving problems involving determination of the location of a shooter based on limited physical evidence at the scene. Computational analysis tools will be presented.
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Sagardia, Mikel, Theodoros Stouraitis, and Joao Lopes e Silva. "Poster: Integration of a haptic rendering algorithm based on voxelized and point-sampled structures into the physics engine Bullet." In 2014 IEEE Symposium on 3D User Interfaces (3DUI). IEEE, 2014. http://dx.doi.org/10.1109/3dui.2014.6798856.

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Zaloznaya, Elizaveta D., Valery P. Kandidov, and Alexander E. Dormidonov. "Dynamics of mid-IR light bullets." In XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, edited by Oleg A. Romanovskii and Gennadii G. Matvienko. SPIE, 2018. http://dx.doi.org/10.1117/12.2504415.

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CHAKRABARTI, S. K., A. NANDI, S. PAL, B. G. ANANDARAO, and SOUMEN MONDAL. "PHOTOMETRIC EVIDENCE OF BULLETS IN SS433 JETS." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0099.

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Zhang, Xinyu, Qingzhen Yang, Yubo He, Xufei Wang, and Saile Zhang. "Aerodynamic and Stealth Characteristics Analysis for a New Type of S-Shaped Inlet With Inner Bulge." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14396.

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Abstract Searching for the optimal solution of the comprehensive performance of the aerodynamic and stealth characteristics of the aircraft inlet has become the trend of the development of the aircraft inlet due to the rapid development of radar detection technology. The aircraft inlet is a vital source of scattering due to its own cavity structure characteristic. Accordingly, reducing the electromagnetic stealth characteristic value of the stealth aircraft inlet can be served as the main way to reduce the RCS value of the whole airplane. Accordingly, a new type of stealth aircraft inlet that incorporates the design of the inner bulge is designed in this paper, which significantly reduces the value of radar-cross section (RCS) of the inlet by transforming the three-dimensional shape of the inlet. The design of this kind of inlet is based on the parametric rapid reconstruction geometry method that produces a geometry profile of the inlet through controlling a limited number of characteristic parameters. At the same time, the profile coordinates of the inner bulge is decided by means of three parameters, including the area of inner bulge, the circumferential distance and the radial offset. This paper calculates the aerodynamic characteristics of the seven S-shaped inlets, including six S-shaped inlets incorporated the inner bulges with different parameters, and an ordinary S-shaped inlet without the inner bulge as a control model. Total pressure recovery and distortion index are used as the indicators for judging the flow characteristics of these inlets to evaluate the effects on the aerodynamic characteristics of the stealth inlet after incorporating the inner bulge, which plays an important role in further evaluating the influence of the working environment of the compressor after the inlet. These S-shaped inlets with inner bulges on them resulting a decrease on total pressure recovery by 0.69% to 1.14%, at the same time, the total pressure distortion index at the exit of inlet is increased by 14.77% to 26.85%. Overall, the aerodynamic performance of the inlet with the design of the inner bulge can’t be seen a large decline. What’s more, this paper also compares the electromagnetic properties of the S-shaped inlet models with the inner bulge with the inlet without the inner bulge, using the algorithm of iterative physical optics (IPO) to evaluate the stealth characteristics of the models. This method is a kind of high-frequency approximation method for analyzing the scattering characteristics of the cavity scattering, with the high calculation accuracy as well as the high calculation efficiency. At the same time, the calculation takes up less memory, this is simply because that the mesh is coarser in calculation when using the IPO algorithm. The resulting inlet design achieving a dramatic improvement in stealth performance that the value of RCS is reduced by up to 97% after incorporating the design of inner bulge. In general, the stealth characteristics of optimized stealth aircraft inlet has greatly improved.
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Reports on the topic "Bullet physics"

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Chapagain, Matrika. Boomers and Physical Fitness: An AARP Bulletin Survey. AARP Research, April 2014. http://dx.doi.org/10.26419/res.00081.001.

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Burroughs, Jedadiah, Jason Weiss, and John Haddock. Influence of high volumes of silica fume on the rheological behavior of oil well cement pastes. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41288.

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Specialized classes of concrete, such as ultra-high-performance concrete, use volumes of silica fume in concrete that are higher than those in conventional concrete, resulting in increased water demand and mixing difficulty. This study considered the effects of eight different silica fumes in three dosages (10%, 20%, 30%) with three w/b (0.20, 0.30, 0.45) on rheological behavior as characterized by the Herschel-Bulkley model. Results indicated that the specific source of silica fume used, in addition to dosage and w/b, had a significant effect on the rheological behavior. As such, all silica fumes cannot be treated as equivalent or be directly substituted one for another without modification of the mixture proportion. The rheology of cement pastes is significantly affected by the physical properties of silica fume more so than any chemical effects.
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ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER. Bulletin of the American Physical Society. Volume 39. Number 4. October 1994. Program of the 1994 Interdisciplinary Laser Science Conference (10th). Fort Belvoir, VA: Defense Technical Information Center, July 1995. http://dx.doi.org/10.21236/ada296716.

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