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Dissertations / Theses on the topic 'Dynamic potential fields'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Beckhaus, Steffi. "Dynamic potential fields for guided exploration in virtual environments." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965713253.

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2

Beckhaus, Steffi [Verfasser]. "Dynamic Potential Fields for Guided Exploration in Virtual Environments / Steffi Beckhaus." Aachen : Shaker, 2003. http://d-nb.info/1172608962/34.

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3

Bott, M. P. "A new, robust, and generic method for the quick creation of smooth paths and near time-optimal path tracking." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2095.

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Robotics has been the subject of academic study from as early as 1948. For much of this time, study has focused on very specific applications in very well controlled environments. For example, the first commercial robots (1961) were introduced in order to improve the efficiency of production lines. The tasks undertaken by these robots were simple, and all that was required of a control algorithm was speed, repetitiveness and reliability in these environments. Now however, robots are being used to move around autonomously in increasingly unpredictable environments, and the need for robotic cont

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4

Andrews, Casey Tyler. "Coarse grained potential functions for proteins derived from all-atom explicit-solvent molecular dynamics simulations." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/1949.

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The use of computational simulation to study the dynamics and interactions of macromolecules has become an important tool in the field of biochemistry. A common method to perform these simulations is to use all-atom explicit-solvent molecular dynamics (MD). However, due to the limitations in computational power currently available, this method is not practical for simulating large-scale biomolecular systems on long timescales. An alternative is to perform implicit-solvent Brownian dynamics (BD) simu

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5

Statheros, Thomas. "Investigation of local minima in autonomous potential field agents/vehicles in pure dynamic environment." Thesis, University of Kent, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.652027.

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Autonomous vehicle navigation can be divided into two major areas of research: Collision avoidance and Track-Keeping. This study focuses on Collision avoidance which is one of the major issues that unmanned autonomous vehicles have to face. Collision avoidance may be further grouped into classical and soft computing based categories. Classical techniques are based on mathematical models and algorithms, while soft-computing techniques are based on Artificial Intelligence. In this study, we focus on the Classical techniques and more specifically in the Potential Field Methods. The potential fiel

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6

Hedin, Johan, and Idris Sahil. "Dynamic Motion Control of a Team of Quadrotor Aircraft Using the Potential Field Method." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214708.

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Unmanned air vehicles (UAV) are becoming moreand more widely used for a variety of different purposes.Transportation, surveillance and defense are but a few of theirapplication fields. There is therefore a need for a system in placethat makes sure the UAV’s are flying properly and withoutcrashing. In this project we seek to find a solution to this problemand develop such a navigation system. This has been done by theuse of sensors to help generate a potential field. The navigationsystem will with the use of potential fields help the UAV reach itsdestination while avoiding collision with other

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7

Wu, Xiaojing. "Contribution to the Development of Advanced Approaches for Electron and Molecular Dynamics Simulations in Extended Biomolecules." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS252/document.

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Cette thèse porte sur deux projets visant au développement de nouvelles approches pour simuler les dynamiques moléculaire et électronique avec application à des biomolécules étendues. Dans la première partie nous cherchons à améliorer significativement la précision des simulations des propriétés rédox des protéines. Dans ce contexte, l'objectif est de recourir à de champ de force reposant sur une description multipolaire des interactions électrostatiques (AMOEBA) pour estimer les potentiels redox d'hémoprotéines. Nous avons dérivé des paramètres pour AMOEBA afin de décrire précisément les inte

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8

Colledanchise, Michele. "Stabilization and Collision Avoidance of Non-point Agents in Dynamic Environments: A Potential Field Approach." Thesis, KTH, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107404.

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Mobile robot navigation has found interest during the last few years in civilian and military research areas due to its main benefit of substituting human presence in dangerous tasks. Examples include bomb deactivation, fire suppression and aerial surveillance. In literature, different definitions of the environment where the vehicles’ motion takes place are considered and the main challenge for mobile robots is to navigate in such environment guaranteeing collision avoidance and convergence towards a desired target. Firstly, in the thesis these classical environments are extended considering

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9

Malik, Waqar Ahmad. "Motion planning of mobile robot in dynamic environment using potential field and roadmap based planner." Texas A&M University, 2003. http://hdl.handle.net/1969/338.

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10

Denker, Michael [Verfasser]. "Interpreting the local field potential as a reflection of cooperative neuronal spiking dynamics / Michael Denker." Berlin : Freie Universität Berlin, 2009. http://d-nb.info/1023816490/34.

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11

Bhatta, Ram S. "Dynamics of Coupled Large Amplitude Motions from Small Non-Rigid Molecules to Conjugated Polymers." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353339449.

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12

Steinke, Gustav Karl. "What the Power Spectrum of Field Potentials Reveals about Functional Brain Connectivity." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1283881427.

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13

Laura, Liliana Abril Garcia. "Population Dynamics of the Brown Planthopper Nilaparvata lugens (Stål) in Rice Fields in Thailand and Its Potential Applications to Pest Management." Kyoto University, 2018. http://hdl.handle.net/2433/232366.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第21165号<br>農博第2291号<br>新制||農||1060(附属図書館)<br>学位論文||H30||N5139(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授縄田栄治, 教授舟川晋也, 教授松浦健二<br>学位規則第4条第1項該当

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14

Song, Brian Inhyok. "EXPERIMENTAL AND ANALYTICAL ASSESSMENT ON THE PROGRESSIVE COLLAPSE POTENTIAL OF EXISTING BUILDINGS." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281712538.

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15

Naseem-Khan, Sehr. "Development of a polarizable ab initio force field : From separability of intermolecular interactions to condensed phase properties." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS564.

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Grâce aux récents progrès de l’informatique, il devient alors possible d’utiliser des champs de forces polarisables sophistiqués tel que SIBFA. En effet, le potentiel intermoléculaire SIBFA et ses gradients sont désormais implémentés dans le code Tinker-HP. La calibration initiale de SIBFA est basée sur la méthode RVS, une méthode de décomposition de l’énergie seulement accessible au niveau Hartree-Fock. Ainsi, les objectifs de ce travail sont double : i) choisir une nouvelle méthode référence de décomposition de l’énergie afin d’obtenir les paramètres de SIBFA au niveau corrélé ; ii) réaliser

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16

Elijah, Daniel. "Neural encoding by bursts of spikes." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/neural-encoding-by-bursts-of-spikes(56f4cf97-3887-4e89-bc0d-8db183ce9ce1).html.

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Neurons can respond to input by firing isolated action potentials or spikes. Sequences of spikes have been linked to the encoding of neuron input. However, many neurons also fire bursts; mechanistically distinct responses consisting of brief high-frequency spike firing. Bursts form separate response symbols but historically have not been thought to encode input. However, recent experimental evidence suggests that bursts can encode input in parallel with tonic spikes. The recognition of bursts as distinct encoding symbols raises important questions; these form the basic aims of this thesis: (1)

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17

Le, Merre Pierre. "Dynamique corticale et intégration sensorielle chez la souris éveillée : impact du contexte comportemental." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1335.

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La perception menant à une prise de décision implique de multiples aires corticales. Il a été proposé que l'information sensorielle se propage des aires sensorielles primaires, codant principalement la nature du stimulus, aux aires de haut-niveau - plus frontales - codant d'avantage la valence du stimulus ou la décision. Pour mieux comprendre l'intégration corticale des signaux sensoriels, nous avons enregistré les réponses sensorielles évoquées (RSE) simultanément dans différentes aires corticales, tandis que des souris apprenaient une tâche de détection sensorielle. Chez les souris ayant app

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18

Magnuson, Matthew Evan. "Effects of severing the corpus callosum on coherent electrical and hemodynamic interhemispheric oscillations intrinsic to functional brain networks." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47681.

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Large scale functional brain networks, defined by synchronized spontaneous oscillations between spatially distinct anatomical regions, are essential to brain function and have been implicated in disease states, cognitive capacity, and many sensing and motor processes. In this work, we sever the corpus callosum in the rodent model to determine if structural connectivity (specifically the primary interhemispheric pathway) organizes and influences bilateral functional connectivity and brain-wide spatiotemporal dynamic activity patterns. Prior to the callosotomy work, resting state brain network

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19

Assowe, Dabar Omar. "Etude des processus de corrosion du nickel par dynamique moléculaire avec un potentiel réactif ReaxFF." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00867048.

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La compréhension des processus de corrosion est un élément majeur de l'étude de la durabilité des matériaux en environnements agressifs. C'est dans ce cadre que ce travail de thèse se situe. L'objectif est d'apporter un nouvel éclairage sur les processus de corrosion du nickel en milieu aqueux en utilisant la simulation par dynamique moléculaire avec un champ de force réactif " ReaxFF ".Nous nous sommes particulièrement intéressé aux réactions entres les molécules d'eau et les surfaces monocristallines de nickel. Ces résultats ont montré aucune dissociation de l'eau sur les surfaces. Par aille

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20

Parks, Nathan Allen. "Neural mechanisms of short-term visual plasticity and cortical disinhbition." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28163.

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Thesis (M. S.)--Psychology, Georgia Institute of Technology, 2009.<br>Committee Chair: Dr. Paul Corballis, Ph.D.; Committee Member: Dr. Daniel Spieler, Ph.D.; Committee Member: Dr. Eric Schumacher, Ph.D.; Committee Member: Dr. Krish Sathian, M.D., Ph.D.; Committee Member: Dr. Randall Engle, Ph.D.

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21

Safeea, Mohammad. "Des robots manipulateurs collaboratifs sûrs." Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE036.

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Les manipulateurs industriels collaboratifs ouvrent une nouvelle ère dans la fabrication flexible, où les robots et les humains sont capables de coexister et de travailler ensemble. Cependant, divers défis persistent pour parvenir à une collaboration complète entre les robots et les humains en milieu industriel. Dans cette thèse, deux défis principaux - la sécurité et la collaboration - sont abordés pour atteindre cet objectif. Concernant la sécurité, la thèse présente une méthode d'évitement des collisions en temps réel qui permet au robot d'ajuster les chemins générés hors ligne pour une tâc

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22

Thompson, Garth John. "Neural basis and behavioral effects of dynamic resting state functional magnetic resonance imaging as defined by sliding window correlation and quasi-periodic patterns." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49083.

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While task-based functional magnetic resonance imaging (fMRI) has helped us understand the functional role of many regions in the human brain, many diseases and complex behaviors defy explanation. Alternatively, if no task is performed, the fMRI signal between distant, anatomically connected, brain regions is similar over time. These correlations in “resting state” fMRI have been strongly linked to behavior and disease. Previous work primarily calculated correlation in entire fMRI runs of six minutes or more, making understanding the neural underpinnings of these fluctuations difficult. Recent

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23

Beckhaus, Steffi [Verfasser]. "Dynamic potential fields for guided exploration in virtual environments / von Steffi Beckhaus." 2002. http://d-nb.info/965713253/34.

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24

HSIAO, YI-LIN, and 蕭義霖. "Granular Dynamics in Uniform and Non-Uniform Potential Fields." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/k45266.

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碩士<br>國立中央大學<br>生物物理研究所<br>101<br>Brownian motion which is excited by the vertical vibration is studied with a single particle in our experiment. The particle's probability velocity distributions match the Gaussian distribution and the position distribution is homogeneous with different vibration condition in the annular container on a regular rough bottom. We setup a single hard sphere and iron bar to do the experiment. Without interaction between the particles, the effect of the potential field in Brownian motion is observed directly. In a symmetric potential field, we find that the hard sp

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25

"Conditional random fields with dynamic potentials for Chinese named entity recognition." 2008. http://library.cuhk.edu.hk/record=b5893775.

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Wu, Yiu Kei.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.<br>Includes bibliographical references (p. 69-75).<br>Abstracts in English and Chinese.<br>Chapter 1 --- Introduction --- p.1<br>Chapter 1.1 --- Chinese NER Problem --- p.1<br>Chapter 1.2 --- Contribution of Our Proposed Framework --- p.3<br>Chapter 2 --- Related Work --- p.6<br>Chapter 2.1 --- Hidden Markov Models --- p.7<br>Chapter 2.2 --- Maximum Entropy Models --- p.8<br>Chapter 2.3 --- Conditional Random Fields --- p.10<br>Chapter 3 --- Our Proposed Model --- p.14<br>Chapter 3.1 --- Background --- p.14<br>Ch

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26

Chiu, Sheng-Sung, and 邱聖淞. "Potential Field Immune Network BasedObstacle Avoidance and Navigation of MobileRobot in Dynamic Environments." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/77147891044828975582.

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碩士<br>大同大學<br>機械工程學系(所)<br>96<br>In the research of navigation the mobile robot, the most important subject is how to dodge obstacles, this thesis will recommend using potential field immune network as the mobile robot avoiding moving obstacles. Because potential field immune network must be give target to calculating appeal virtual attractive force and virtual repulsive force, so target be giving by stereo vision system, then calculating relative distance and angle between the mobile robot and target, regard as target of the potential field immune network. IT can make that the mobile robot n

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27

Chou, Si Yu, and 周思妤. "The Implementation of a Dynamic Obstacle Avoidance System for a Mobile Robot Using Artificial Potential Field." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/54007626593303099936.

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碩士<br>國立清華大學<br>動力機械工程學系<br>104<br>This thesis applied artificial potential field to avoid obstacles for wheeled mobile robot. This system implements by using microcontroller and a laser range finder to obtain environment information. The artificial potential field approach constructs a virtual potential field for robot, obstacles and target. It introduces an attractive potential field at target and a repulsive potential field at obstacle to determine the moving path and speed for the mobile robot moving to target without collision. However, there are some defects, when avoiding moving-obs

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28

Murphy, Raegan. "A Review of South African research in the field of dynamic assessment." Thesis, 1995. http://hdl.handle.net/2263/24307.

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Dynamic assessment, which is often characterised by the learning potential approach across the world and in South Africa, is receiving more and more attention from educators and research practitioners alike. The nature of dynamic assessment lends itself to application in areas where prior dependence on static (traditional) forms of psychometric assessment can no longer be sustained as viable options towards assessment. A main focus area within dynamic assessment is the field of tertiary selections and admissions. More research is needed in this field in South Africa and in order to progress wi

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29

Kendrick, John, Jamshed Anwar, Waard H. de, A. Amani, W. L. J. Hinrichs, and H. W. Frijlink. "Evaluation and Optimization of a Force Field for Crystalline Forms of Mannitol and Sorbitol." 2010. http://hdl.handle.net/10454/4752.

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Two force fields, the GROMOS53A5/53A6 (united atom) and the AMBER95 (all atom) parameter sets, coupled with partial atomic charges derived from quantum mechanical calculations were evaluated for their ability to reproduce the known crystalline forms of the polyols mannitol and sorbitol. The force fields were evaluated using molecular dynamics simulations at 10 K (which is akin to potential energy minimization) with the simulation cell lengths and angles free to evolve. Both force fields performed relatively poorly, not being able to simultaneously reproduce all of the crystal structures within

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30

Satel, Jason. "Mechanisms of inhibition of return: Brain, behavior, and computational modeling." 2013. http://hdl.handle.net/10222/21717.

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Inhibition of return (IOR) is a cognitive phenomenon whereby reaction times (RTs) are slower to cued relative to uncued targets at cue-target onset asynchronies (CTOAs) greater than approximately 300 ms. One important theory of IOR proposes that there are two mutually exclusive forms of IOR, with an attentional/perceptual form arising when the oculomotor system is actively suppressed, and a motoric form arising when it is engaged (Taylor & Klein, 2000). Other theories propose that IOR is the result of multiple, additive neural mechanisms (Abrams & Dobkin, 1994). Here, we have performed computa

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31

BARVÍKOVÁ, Hana. "Studium interakcí organické hmoty a jejích složek pomocí molekulární dynamiky." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-173115.

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Humic acids and humates are principal components of humic substances major organic constituents of soil, peat, coal and water around the world. I was involved in research into molecular dynamics simulations of interactions of quartz surfaces with aqueous solutions of ions and small organic molecules representing basic building blocks of larger biomolecules and functional groups of organic matter. We studied interactions of molecules with surfaces for a set of surface charge densities corresponding to the experimentally or environmentally relevant ranges of pH values employing molecular mechani

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32

Safeea, Mohammad. "Safe Collaborative Robotic Manipulators." Doctoral thesis, 2020. http://hdl.handle.net/10316/95015.

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Tese no âmbito do Doutoramento em Engenharia Mecânica, Gestão e Robótica Industrial, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>Collaborative robotic manipulators are new type of industrial manipulators, that allow the coexistence of humans in the same working area around the robot. Consequently, a human can work safely beside a collaborative manipulator, without having physical barriers or safety fences separating between them. In light of this, we can see that the main features of collaborative robots are centred around two main aspects, safety and collab

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