Dissertations / Theses on the topic 'Signal behavior'
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Elmitiny, Noor. "Providing a Better Understanding for the Motorist Behavior Towards Signal Change." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4264.
Full textPh.D.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering PhD
Jai, Wun Hoa Arthur. "Underwater acoustic signal behavior prediction in the region of Kauai Island." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/33582.
Full textIncludes bibliographical references (p. 175-176).
Behavior of underwater sound propagation over long-ranges has been studied for several decades. The purpose of this is to describe sound propagation phenomena in various ocean environments. The key to understanding and visualizing is mathematical modeling. In the ocean acoustics community, four major mathematical techniques have been commonly used to model behavior of acoustic signal in the ocean environment. And they can be categorized into two different fields, range-independent and range-dependent. The accuracy of each method is depends on the environment characteristics. Since the propagating signal can be characterized through the mathematical modeling, it is then possible to use the propagating signal to perform beamforming and determine the characteristic of beam output.
by Wun Hoa Arthur Jai.
S.M.
Glaser, John Stanley 1964. "Topics in large-signal behavior of power electronic converters and systems." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282217.
Full textPhillips, Catherine T. Johnston Carol Eileen. "Evolution of signal divergence and behavior in Cyprinella galactura, the whitetail shiner." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Dissertations/PHILLIPS_CATHERINE_27.pdf.
Full textAl-Mudhaffar, Azhar. "Impacts of Traffic Signal Control Strategies." Doctoral thesis, Stockholm : Division of transports and logistics, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4268.
Full textDrake, Daniel F. "Information's role in the estimation of chaotic signals." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/14793.
Full textMcKay, Ailsa J. "Central vasopressin signalling and aggressive behaviour." Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/4194.
Full textSaggese, Alessia. "Detecting and indexing moving objects for behavior analysis by video and audio interpretation." Doctoral thesis, Caen, 2014. http://www.theses.fr/2014CAEN2021.
Full textIn the last decades we have assisted to a growing need for security in many public environments. The main limitation of this traditional audio-video surveillance systems lies in the so called psychological overcharge issue of the human operators responsible for security, that causes a decrease in their capabilities to analyse raw data flows from multiple sources of multimedia information. For the above mentioned reasons, in this thesis we propose an intelligent surveillance system able to provide images and video with a semantic interpretation, for trying to bridge the gap between their low-level representation in terms of pixels, and the high-level, natural language description that a human would give about them. In particular, the proposed framework starts by analysing the videos and by extracting the trajectories of the objects populating the scene. Once extracted, this large amount of trajectories needs to be indexed and properly stored in order to improve the overall performance of the system during the retrieving. Furthermore, the human operator is informed as soon as an abnormal behaviour occurs. Whereas the information extracted from the videos are not sufficient or not sufficiently reliable, the proposed system in enriched by a module in charge of recognizing audio events, such as shoots, screams or broken glasses. Each proposed module has been tested both over standard datasets and in real environments; the promising obtained results confirm the advance with respect to the state of the art, as well as the applicability of the proposed method in real scenarios
Lee, Chungyong. "Noise reduction methods for chaotic signals with application to secure communications." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/14823.
Full textLarsson, Petter. "Automatic Visual Behavior Analysis." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1980.
Full textThis work explores the possibilities of robust, noise adaptive and automatic segmentation of driver eye movements into comparable quantities as defined in the ISO 15007 and SAE J2396 standards for in-vehicle visual demand measurements. Driver eye movements have many potential applications, from the detection of driver distraction, drowsiness and mental workload, to the optimization of in-vehicle HMIs. This work focuses on SeeingMachines head and eye-tracking system SleepyHead (or FaceLAB), but is applicable to data from other similar eye-tracking systems. A robust and noise adaptive hybrid algorithm, based on two different change detection protocols and facts about eye-physiology, has been developed. The algorithm has been validated against data, video transcribed according to the ISO/SAE standards. This approach was highly successful, revealing correlations in the region of 0.999 between analysis types i.e. video transcription and the analysis developed in this work. Also, a real-time segmentation algorithm, with a unique initialization fefature, has been developed and validated based on the same approach.
This work enables real-time in-vehicle systems, based on driver eye-movements, to be developed and tested in real driving conditions. Furthermore, it has augmented FaceLAB by providing a tool that can easily be used when analysis of eye movements are of interest e.g. HMI and ergonomics studies, analysis of warnings, driver workload estimation etc.
Laporte, Marion N. C. "Pant-grunts in wild chimpanzees (Pan troglodytes schweinfurthii) : the vocal development of a social signal." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1973.
Full textMagoon, Michael Austin Newland M. Christopher. "Response-consequence contingency discriminability when positive and negative reinforcement compete in concurrent schedules." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/doctoral/MAGOON_MICHAEL_57.pdf.
Full textBryant, Craig William. "Study of Truck Driver Behavior at Onset of Yellow Traffic Signal Indication for the Design of Yellow Times." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/25149.
Full textMaster of Science
Cai, Qin. "Detecting Chaotic Signals with Nonlinear Models." PDXScholar, 1993. https://pdxscholar.library.pdx.edu/open_access_etds/4564.
Full textDiep, Sanh K. "The role of social interactions on the development and honesty of a signal of status." UKnowledge, 2012. http://uknowledge.uky.edu/biology_etds/9.
Full textSalazar, Vielka Lineth. "The Effect of male-male competition and its Underlying Regulatory Mechanisms on the Electric Signal of the Gymnotiform fish Brachyhypopomus gauderio." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/114.
Full textKolodziejski, Johanna A. "Signal production and function in weakly electric fish a comparative investigation of sexually dimorphic communication behavior in Apteronotus /." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3277965.
Full textSource: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5788. Adviser: G. Troy Smith. Title from dissertation home page (viewed May 8, 2008).
Pavony, Michelle. "Somatosensory processing and borderline personality disorder a signal detection analysis of proprioception and exteroceptive sensitivity /." Diss., Online access via UMI:, 2009.
Find full textBranham, Marc A. "The evolution of Lampyridae, with special emphasis on the origin of photic behavior and signal system evolution (Coleoptera: Lampyridae) /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486402957196158.
Full textTalwar, Malvika. "Evolution of signal frequency in Neoconocephalus (Orthoptera: Tettigoniidae) a study of perceptual and environmental sources of selection /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5972.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on October 18, 2007) Vita. Includes bibliographical references.
Goosen, Ryno Johannes. "Sense, signal and software : a sensemaking analysis of meaning in early warning systems." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96132.
Full textENGLISH ABSTRACT: This thesis considers the contribution that Karl Weick’s notion of sensemaking can make to an improved understanding of weak signals, cues, warning analysis, and software within early warning systems. Weick’s sensemaking provides a framework through which the above mentioned concepts are discussed and analysed. The concepts of weak signals, early warning systems, and Visual Analytics are investigated from within current business and formal intelligence viewpoints. Intelligence failure has been a characteristic of events such as 9/11, the recent financial crisis triggered by the collapse of Lehman Brothers, and the so-called Arab Spring. Popular methodologies such as early warning analysis, weak signal analysis and environmental scanning employed within both the business and government sphere failed to provide adequate early warning in many of these events. These failures warrant renewed attention as to what improvements can be made and how new technology can enhance early warning analysis. Chapter One is introductory and states the research question, methodology, and delimits the thesis. Chapter Two sets the scene by investigating current conceptions of the main constructs. Chapter Three explores Weick’s theory of sensemaking, and provides the analytical framework against which these concepts are then analysed in Chapter Four. The emphasis is directed towards the extent of integration of frames within the analysis phase of early warning systems and how frames may be incorporated within the theoretical foundation of Visual Analytics to enhance warning systems. The findings of this thesis suggest that Weick’s conceptualisation of sensemaking provide conceptual clarity to weak signal analysis in that Weick’s “seed” metaphor, representing the embellishment and elaboration of cues, epitomizes the progressive nature of weak signals. The importance of Weick’s notion of belief driven sensemaking, in specific the role of expectation in the elaboration of frames, and discussed and confirmed by various researchers in different study areas, is a core feature underlined in this thesis. The centrality of the act of noticing and the effect that framing and re-framing has thereon is highlighted as a primary notion in the process of not only making sense of warning signals but identifying them in the first place. This ties in to the valuable contribution Weick’s sensemaking makes to understanding the effect that a specification has on identifying transients and signals in the resulting visualization in Visual Analytic software.
AFRIKAANSE OPSOMMING: Hierdie tesis ondersoek hoe Karl Weick se konsep van singewing ons insig teenoor swak seine, tekens, waarskuwingsanalise en sagteware binne vroeë waarskuwingstelsels verbeter. Weick se bydrae verskaf ‘n raamwerk waarbinne hierdie konsepte geanaliseer en ondersoek kan word. Die konsep van swak seine, vroeë-waarskuwing en visuele analise word binne huidige besigheidsuitgangspunte, en die formele intelligensie arena ondersoek. Die mislukking van intelligensie is kenmerkend van gebeure soos 9/11, die onlangse finansiёle krisis wat deur die ondergang van Lehman Brothers ingelei is, en die sogenaamde “Arab Spring”. Hierdie gebeure het ‘n wêreldwye opskudding op ekonomiese en politiese vlak veroorsaak. Moderne metodologieё soos vroeë waarskuwingsanalise, swaksein-analise en omgewingsaanskouing binne regerings- en besigheidsverband het duidelik in hul doelstelling misluk om voortydig te waarsku oor hierdie gebeurtenisse. Dit is juis hierdie mislukkings wat dit noodsaaklik maak om meer aandag te skenk aan hierdie konsepte, asook nuwe tegnologie wat dit kan verbeter. Hoofstuk Een is inleidend en stel die navorsingsvraagstuk, doelwitte en afbakkening. Hoofstuk Twee lê die fondasie van die tesis deur ‘n ondersoek van die hoof konsepte. Hoofstuk Drie verskaf die teoretiese raamwerk, die van Weick se singewingsteorie, waarteen die hoof konsepte in Hoofstuk Twee ondersoek word in Hoofstuk Vier. Klem word gelê op die diepte van integrasie en die toepassing van raamwerke in die analisefase van vroeё waarskuwingstelsels en hoe dit binne die teoretiese beginsels van visuele analise geïnkorporeer word. Die bevindinge van hierdie tesis spreek die feit aan dat Weick se konsepsualisering van singewing konseptuele helderheid rakende die begrip “swakseine” verskaf. In hierdie verband verteenwoordig Weick se “saad”- metafoor die samewerking en uitbouing van seine en “padpredikante” wat die progressiewe aard van swakseine weerspieёl. Die kernbeskouing van hierdie tesis is die belangrikheid van Weick se geloofsgedrewesingewing, veral die uitkoms van die bou van raamwerke asook die bespreking hiervan deur verskeie navorsers. Die belangrikheid van die aksie om seine op te merk, en die effek wat dit op die herbeskouing van raamwerke het, asook die raaksien daarvan in die eerste plek word beklemtoon. Laasgenoemde dui ook aan tot watter mate Weick se singewingsteorie ‘n bydrae maak tot visuele analise veral in ons begrip van die gevolg wat data of inligtingspesifikasie het op die identifisering van seine en onsinnighede in visualisering binne visuele analise-sagteware.
Hallberg, Karen Irene. "Information in a long-distance vocal signal chorus howling in the coyote (Canis latrans) /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1189626727.
Full textReynolds, Anna R. "Gαq-ASSOCIATED SIGNALING PROMOTES NEUROADAPTATION TO ETHANOL AND WITHDRAWAL-ASSOCIATED HIPPOCAMPAL DAMAGE." UKnowledge, 2015. http://uknowledge.uky.edu/psychology_etds/74.
Full textSmith, David M. "A role for adenylyl cyclase and the CREB/CRE transctiptional pathway in mammalian behavior /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/6296.
Full textEhlebracht, Daniel Verfasser], Detlef [Akademischer Betreuer] [Fetchenhauer, and Erik [Akademischer Betreuer] Hölzl. "Doing good does you good : Prosocial behavior as a sexual and social signal / Daniel Ehlebracht. Gutachter: Detlef Fetchenhauer ; Erik Hölzl." Köln : Universitäts- und Stadtbibliothek Köln, 2013. http://d-nb.info/104407356X/34.
Full textOng, Boon Teck. "Study of Bus Driver Behavior at the Onset of Yellow Traffic Signal Indication for the Design of Yellow Time Durations." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/64454.
Full textMaster of Science
Ehlebracht, Daniel [Verfasser], Detlef [Akademischer Betreuer] Fetchenhauer, and Erik [Akademischer Betreuer] Hölzl. "Doing good does you good : Prosocial behavior as a sexual and social signal / Daniel Ehlebracht. Gutachter: Detlef Fetchenhauer ; Erik Hölzl." Köln : Universitäts- und Stadtbibliothek Köln, 2013. http://d-nb.info/104407356X/34.
Full textVenator, Kurt Richard. "The Influence of signal attenuation and degradation on behavior and midbrain auditory thresholds in the cricket frog, Acris crepitans blanchardi /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Full textLaDue, Chase Andrew. "Chemical Signaling in Asian Elephants (Elephas Maximus): Concentration Effects with Applications for Management and Conservation." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1622.
Full textGooch, Steven R. "A METHOD FOR NON-INVASIVE, AUTOMATED BEHAVIOR CLASSIFICATION IN MICE, USING PIEZOELECTRIC PRESSURE SENSORS." UKnowledge, 2014. http://uknowledge.uky.edu/ece_etds/56.
Full textCournault, Laurent. "Regulation of reproduction in polygynous ants (Dolichoderinae): queen fertility signal and adult polyploidy." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210332.
Full textHere I investigated two aspects of the reproduction of two polygynous ant species. The first one, Linepithema humile, is a unicolonial, highly polygynous and invasive species. It has been the focus of numerous studies about queen pheromones; in particular, it has been reported that queen cuticular hydrocarbons (CHC) profile is related to queen fertility. The other one, Tapinoma erraticum, is a multi-colonial, weakly polygynous and native species. Workers can lay haploid eggs in the absence of the queens which is impossible for Linepithema workers.
The major part of my thesis dealt with the queen fertility signalling issue. In the first two chapters I demonstrate the link between queen fertility and queen pheromone output. I first study a queen releaser pheromone, the queen retrieval behaviour. This behaviour is performed by the workers who lay a chemical trail toward a queen located outside the nest. I successfully show this behaviour to be related to queen fertility, and not mating status, in L. humile and T. erraticum since only fertile queens (mated or not) induce such recruitment. I then highlight the role of queen fertility in the prevention of worker reproduction in T. erraticum. Again, mated fertile queens and unmated fertile queens are both able to induce such primer effect. In a third chapter I report that CHC profiles may discriminate female castes (workers, queens, virgin queens, and virgin egg-laying queens) in T. erraticum. Finally, chapter 4 summarizes my attempts to prove that CHC may be involved in queen retrieval or queen attraction. None of the various bioassays tested allows me to demonstrate the putative role of CHC as queen pheromone.
In a second part, I was interested in the consequences of sex determination in T. erraticum. Chapter 5 presents the flow cytometry methodology (FC) which allowed me to score the number of sperm cells from spermathecae of several ant species, and to demonstrate that polygynous species (such as L. humile and T. erraticum) store less sperm than monogynous ones. FCM also allows determining the ploidy of sperm and adult somatic cells and chapter 6 which presents a large survey on the ploidy level within the species T. erraticum. This species displays diploid males that may produce diploid sperm which in turn can father a viable triploid female progeny. I report differences in the frequency of triploidy among female castes, the proportion of triploid workers being more important than triploid virgin queens whereas I never observed triploid mated fertile queens. Such results greatly suggest a putative regulatory mechanism involved in the rearing of triploid females. In the last chapter I investigated two populations that differ in the occurrence of triploid workers. I report these populations to vary in the number of queens and workers per nest.
/La régulation de la reproduction est un aspect essentiel de la vie sociale. En particulier, chez les espèces eusociales, seuls quelques individus sont impliqués dans la production de la descendance. Dans les sociétés d’insectes, une telle division du travail reproducteur est principalement assurée par l’émission de phéromones par les reines. Ces phéromones royales renseignent les membres de la colonie sur la présence d’une reine fertile, de telle sorte que les ouvrières réagissent en s’occupant d’elle et en s’abstenant de se reproduire.
Au cours de ce travail, je me suis intéressé à deux aspects de la reproduction au sein de deux espèces de fourmis polygynes. La première espèce, Linepithema humile, est invasive, unicoloniale et hautement polygyne dans les régions à climat méditerranéen. Elle a fait l’objet de nombreuses études portant notamment sur les phéromones royales. En particulier, il a été montré que le profil d’hydrocarbures cuticulaires (HCC) des reines est corrélé à leur fertilité. La seconde espèce, Tapinoma erraticum, est une espèce indigène, multi-coloniale et faiblement polygyne. Ses ouvrières sont capables de pondre des œufs mâles en absence de reines, ce dont sont incapables les ouvrières de Linepithema.
Je me suis principalement intéressé à la question de la signalisation de la fertilité des reines. Dans les deux premiers chapitres, je démontre le lien existant entre la fertilité des reines et la production de phéromone royale. J’ai d’abord étudié une phéromone incitatrice (releaser) qui provoque un recrutement royal. Ce comportement collectif très caractéristique correspond à la mise en place d’une piste chimique en direction d’une reine découverte par les ouvrières en dehors du nid. Je montre que ce comportement est lié à la fertilité de la reine chez les espèces L. humile et T. erraticum car seules les reines fertiles (fécondées ou non) sont capables de d’induire le recrutement royal. Je mets ensuite en évidence le rôle de la fertilité des reines dans la régulation de la reproduction des ouvrières de T. erraticum. A nouveau, les reines fécondées fertiles et les reines vierges fertiles sont toutes deux capables d’induire un même effet déclencheur (primer), en l’occurrence, l’inhibition de la reproduction des ouvrières. Dans un troisième chapitre, je montre que les profils d’hydrocarbures (HCC) permettent de distinguer sans ambiguïté les différentes castes femelles (ouvrières, reines fertiles, reines vierges et reines vierges pondeuses) chez T. erraticum. Enfin, le chapitre 4 résume mes tentatives pour démontrer le rôle des HCC dans les phénomènes de recrutement royal ou d’attractivité des reines. Aucun des bio-essais réalisés ne me permet de démontrer l’implication des HCC dans la phéromone royale.
Dans une seconde partie, je me suis intéressé aux conséquences du déterminisme du sexe chez T. erraticum. Le chapitre 5 présente cytométrie de flux (CF), une méthode qui me permet de compter les spermatozoïdes stockés dans les spermathèques de quelques espèces de fourmis et de montrer que les reines des espèces polygynes (telles que L. humile et T. erraticum) stockent moins de sperme que les espèces monogynes. La CF permet aussi de déterminer le niveau de ploïdie des cellules spermatiques ou somatiques chez l’adulte. Je me sers de cette application dans le chapitre 6 afin d’étudier le niveau de ploïdie au sein de l’espèce T. erraticum. Je montre que, dans les populations étudiées, il existe des mâles diploïdes et que ces mâles peuvent produire du sperme diploïde fertile, capable d’engendrer une descendance femelle triploïde. Je note des différences dans la fréquence des femelles triploïdes :la proportion d’ouvrières triploïdes est significativement plus importante que celle des reines vierges triploïdes. De plus, je n’ai jamais observé la présence de reines fécondées fertiles triploïdes. De tels résultats suggèrent fortement la présence d’un phénomène de régulation au cours de l’élevage du couvain triploïde. Dans le dernier chapitre, j’ai étudié deux populations de T. erraticum qui diffèrent au niveau de la proportion d’ouvrières triploïdes. Ces populations présentent des différences significatives dans le nombre de reines et d’ouvrières par nid.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Olsen, Erik Charles Buck. "Modeling Slow Lead Vehicle Lane Changing." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/29889.
Full textPh. D.
Dumont, Emmanuel. "Collaboration entre un humain, un robot et un système ambiant pour l’évaluation de comportements." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2484/document.
Full textTo evaluate a human behavior is equivalent to evaluate all the markers translating this behavior (gestures, lyrics interactions, etc.). The observation by a human of certain markers such as facial expressions, prosody or linguistics, requires specialized training. To facilitate the assessment of behavior, scales indicating the observations to be made and the conclusions to be made are used. Thus, automating the evaluation of the behavior amounts to automate the analysis of an environment by means of several sensors, then analyzing the signals obtained in order to extract the markers allowing the deduction of the observed behavior. Due to the variability of human observations in overly specific analyzes, more and more studies are using thes automatic observation and behavioral evaluation systems. The objective is to assist human analysis and evaluation by exploiting automatic systems capable of extracting information that is difficult to observe for humans. As a result, the collaboration between the human and the computer systems makes it possible to analyze more elements of the behavior in a reliable and objective way. This thesis proposes an approach of behavior analysis based on the collaboration between humans and an automatic system. We set up an electronic and computer platform consisting of a mobile robot and an ambient system to evaluate human behavior. This platform is defined as: — Modular to the addition or removal of sensors: The addition and removal of sensors is feasible without a system is impacted otherwise than its performance to accurately recognize behaviors; — Accessible to Reading Recorded Data: The use of ontologies, as a semantic and logical database, makes the platform usable and accessible to people unfamiliar With complex computer systems; — Robust to ambiguities: every platform system (ambient or robot) is independent and has its own representation of the environment. However, they collaborate With each Other to respond to inconsistencies or lack of information during the performance of a task
Yu, Xiaoyang. "Dynamic acoustic emission for the characterization of the nonlinear behavior of complex materials." Thesis, Le Mans, 2020. http://www.theses.fr/2020LEMA1019.
Full textAcoustic emission (AE) is well known to be an efficient structural health monitoring technique to detect the creation and propagation of micro-cracks within structural materials such as concrete or composites when submitted to quasi-static stresses. Based on adequate signal processing methods, different research studies have established links between the detected AE hits and the created micro-damages. Other works have shown that it is possible to correlate the relaxation time in composites and the energy of the damage mechanisms measured during the quasi-static loading using the recorded AE hits. This thesis proposes to use an original experimental protocol to probe the nonlinear relaxation of concrete samples at the intact and damaged states. This protocol is based on the use of AE to passively probe the nonlinear relaxation of concrete samples instead of the weak amplitude signal usually used in slow dynamics experiments. Results show that passive and active probing methods lead to equivalent relaxation times. Furthermore, AE probing reveals the existence of a ‘silence period’ during the first minutes of the nonlinear relaxation after which AE hits start to be detected. In addition, the characteristics of AE hits recorded during the passive relaxation showed a clear resemblance to those obtained during the damaging of the same samples, where shear and compression mechanisms are involved. For the clustering of the AE hits, in addition to use of an unsupervised pattern recognition approach to cluster the detected AE hits, this work proposes a novel ‘image- based AE classification’ approach based on continuous wavelet transform (CWT) and convolutional neural network (CNN). Results related to the nonlinear dynamic and quasi-static AE data show that both signal processing approaches have high classification accuracy, which represents a great interest in the development of dynamic AE methods in the presence of micro-cracks
Moretz, Jason A. "A Comparative Analysis of the Role of Male – Male Competition in the Evolution of Aggression, Vertical Bars and Male Body Size in the Northern Swordtail Fishes." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1090936908.
Full textNarango, Desiree Lynn. "Causes and Consequences of Urban-associated Song Variation: A Study of Vocal Behavior in the Northern Cardinal (Cardinalis cardinalis)." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337792731.
Full textKim, Jonathan Chongkang. "Classification of affect using novel voice and visual features." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54301.
Full textShabani, Shkelzen. "The Role of Chemical Senses in Predation, Risk Assessment, and Social Behavior of Spiny Lobsters." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/biology_diss/44.
Full textHarirforoush, Homayoun. "Evaluation of the LHOVRA O-function using the microsimulation tool VISSIM." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-87757.
Full textCardoso, Alexandre Moraes. "Manejo de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) em milho, Zea mays L.: bases para avaliação populacional e controle biológico utilizando o parasitóide de ovos Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera:Trichogrammatidae)." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-25042007-155956/.
Full textThe objectives of this research were the improvement of cross-section Spodoptera frugiperda using pheromone traps to verify the capacity of dispersion of Trichogramma atopovirilia as an agent for biological pest control as well as evaluating the attractiveness of Amaranthus sp. to T. atopovirilia females. To improve cross-section of S. frugiperda, the studies were carried out in two commercial corn field plantations, one made up of 36,3 ha (called MIP and with 30 points of sampling) and another of 10 ha (called conventional and with 10 points of sampling). In these fields pheromone traps were randomly displaced (ratio of 1 trap/ha). The evaluations were realized twice a week during the whole plant development, considering : number of male adults collected by the traps, insect injury to plants, egg masses and larval densities (small, medium and large). The numbers of adults collected were correlated to the insect injury, egg masses and larval density. The larval occurrence did not show difference between areas and sampling points. The injury levels, egg masses and small larva densities did not show correlation to adult caught by traps. There was significant correlation between large larvae (4th and 5th instars) and the number of plants showing whorl holes and/or destroyed ones. There were no correlations observed among adults caught by traps and insect infestation or injury, so demonstrating that larvae should be counted for timing pest control. The capacity of dispersion of T. atopovirilia was studied in 3 distinct phases of corn plant development, when they had 4 to 6 leaves, 8 to 10 leaves and tassel. In each stage was applied an artificial infestation with egg masses (< 24 h) of S. frugiperda on plants located 6 to 24 m from a parasitoid release point. Right after this artificial infestation, was applied only one parasitoid adult release to each distinct corn plant phase , always early in the morning or late in the afternoon. The parasite contamination was allowed during 48 h and then the egg masses were retrieved and taken into a climatic chamber until emerging adulthood. The results showed that plants affected the parasitoid dispersal. The egg masses placed farthest from the release point were parasited only during the 4 to 6-leaf stage. In the others stages, only egg masses next to the release point were parasited. The attractiveness of four species of Amaranthus (A. retroflexus, A. viridis, A. hybridus and A. spinosus) to the females of T. atopovirilia was evaluated by a Petersons olfactometer. These plants were evaluated in both vegetative and reproductive stages. Complete randomized procedure was adopted with 40 replications (considering one insect/replication) and each insect was observed during 600 seconds. The most attractive species were A. viridis and A. retroflexus during vegetative and reproductive stage, respectively. When plants were tested simultaneously, the species did not show attractive properties to the parasitoids. These results suggest the viability of the use of these plants or its derivatives to change host habitat and parasite increase for biological control in integrated pest management.
Alderson, Robert. "ADHD AND STOP-SIGNAL BEHAVIORAL INHIBITION: IS MEAN REACTION TIME CONTAMINATED BY EXPOSURE TO INTERMITTENT STOP-SIGNALS?" Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2464.
Full textPh.D.
Department of Psychology
Sciences
Psychology PhD
Alderson, Robert Matthew. "ADHD and stop-signal behavioral inhibition is mean reaction time contaminated by exposure to intermittent stop-signals? /." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002218.
Full textGOMES, RENATO ARREGUI. "RADIO SIGNAL BEHAVIOUR ON MICROCELLULAR MOBILE ENVIRONMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7473@1.
Full textCom o aumento da demanda pelos serviços celulares se faz necessário estudar e desenvolver técnicas cada vez mais sofisticadas para a melhoria da capacidade e da qualidade dos sistemas celulares. Uma destas é a utilização moderada de microcélulas em regiões urbanas, e em algumas situações em regiões suburbanas. Os maiores problemas da utilização de microcélulas são suas características de propagação, bem diferentes das características das células convencionais. Para melhor compreender as características de propagação de um sinal rádio móvel num ambiente microcelular, este trabalho se propôs a fazer um estudo experimental onde, fenômenos como forma de células, efeitos de sombreamento, multipercurso e outros, foram analisados. Um laboratório móvel foi montado e uma grande campanha de medidas foi realizada em ambientes urbanos de características diferentes. Análises determinísticas e estatísticas, foram realizadas para se determinar parâmetros como o fator de queda do sinal com a distância e o desvio padrão da variabilidade do sinal. Estes resultados são importantes para o cálculo aproximado da cobertura do sinal em regiões semelhantes às estudadas. Especial atenção foi dada ao cálculo do ponto de quebra da dependência do sinal com a distância. Este ponto define a transição entre a região de campo próximo e a região de difração, sendo fundamental para estudos de cobertura. Uma importante contribuição foi na determinação da dependência da cobertura do sinal com a altura da antena transmissora. Os resultados medidos ajudaram a caracterizar a célula e conseqüentemente obter informações para localizações ótimas das altura das antenas, além de definir a melhor cobertura que estas alturas podem oferecer. Uma análise estatística da variabilidade do sinal foi realizada e distribuições de probabilidade foram testados frente aos resultados experimentais. A determinação de parâmetros importantes destas distribuições ajudou na verificação da aderência destes modelos aos resultados medidos. Os resultados são de extrema importância para esclarecer aspectos de propagação do sinal em microcélulas e disponibilizar dados para a elaboração de modelos de predição para o cálculo da cobertura do sinal para o projetista, resultando numa melhoria da qualidade e da capacidade do sistema microcelular.
The ever-increasing demand for cellular services raises the necessity of developing more sophisticated techniques to improve system quality and capacity. One of the techniques is the use of microcells in urban and occasionally suburban regions. However, the major problems facing the microcell deployment are the microcells peculiar propagation characteristics, which are very different from the conventional cellular systems. In order to address this problem, an experimental study of cell shape, shadowing effects and multipath, was carried out. A mobile laboratory was assembled and extensive measurements on different urban environments were performed. Deterministic and statistical analysis were carried out to find the parameters such as path loss versus distance factor, and the standard deviation of signal variability. Special attention was given to the determination of the breaking point, transition between the near field and diffraction regions on line-of-sight path. An important contribution was on the study of the effects of transmitter antenna height on coverage. The measured results will help on cell characterization and on finding the best height for the base station antennas. A statistical analysis of signal variability was performed to determine the best-fit probability distribution function with parameters carefully calculated. The collected results are of extreme importance to clarify propagation aspects of microcellular signal and to make it available a huge data bank for elaboration of better prediction models which will produce better quality and capacity of the microcellular systems.
Garcia, Thomas. "A behavioral approach of decision making under risk and uncertainty." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/132313/1/Thomas%20Jean-Christophe%20Lucien_Garcia_Thesis.pdf.
Full textGarcia, Thomas. "A behavioral approach of decision making under risk and uncertainty." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE2042/document.
Full textThis thesis investigates how individuals make decisions under risk and uncertainty. It is composed of four essays that theoretically and experimentally investigate decision-making.The first two essays study situations where a decision maker has to decide whether an event has occurred using uncertain evidence. Accurately identifying that this event has occurred is more rewarded than accurately identifying that it has not occurred. This decision problem induces a divergence between two qualities of a decision: optimality and accuracy. Both essays reproduce such situations in a laboratory experiment based on perceptual tasks and analyze behavior using Signal Detection Theory to study the optimality-accuracy trade-off. The first essay confirms the existence of the trade-off with a leading role of accuracy. It explains the trade-off by the concern of individuals for being right. The second chapter finds that presenting perceptual evidence last contributes to the existence of the optimality-accuracy trade-off.The third essay studies how other-regarding preferences interact with attitude toward ambiguity. It reports the results of an experiment where subjects have to make donations to charities. Donations may have either ambiguous costs or ambiguous benefits. We find that other-regarding preferences are decreased under ambiguity. In other terms, we highlight that individual use ambiguity has an excuse not to give. This excuse-driven behavior is stronger for ambiguous costs than ambiguous benefits.The fourth essay challenges the external validity of laboratory risk preference measures using behavior in experimental risk tasks and naturally occurring behavior under risk. We find that risk preference measures are related with the former but that they fail to explain the latter
Dallaire, François. "Electric sensing zone signal behaviour in liquid aluminium." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61133.
Full textBoth the sensor and the preprocessing stages of the signal are described. A mathematical model of the high pass filtering transfer function is developed in the time domain to predict its role in modifying the raw signal's transient waveforms.
Classes of signal transients are identified and described in anticipation of further development based on pattern recognition techniques. Signal behaviour description in specific situations are performed through the relative occurrence rates of each class of transient. Attention is directed towards extraction of information relative to, both the production of particle size distribution as well as for sensor control purposes.
Vezenkov, Stoyan Raykov. "Pharmacological studies on the contribution of the neuropeptide proctolin to the cephalic control of singing behavior in grasshopper Chorthippus biguttulus (L. 1758)." Doctoral thesis, [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974032557.
Full textCarneiro, Breno Tercio Santos. "Sincroniza??o dos ritmos de atividade motora e temperatura central ? disponibilidade de glicose em ratos." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17300.
Full textConselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
Food is essential for the survival of all animals. Its temporal availability is an important enviromental cue for the behavioral and physiological organization throughout the 24 hours of day in different species. Rats and mice, for example, show increased locomotion in the hours before food availability when it is presented in a recurrent manner, a behavior named foodanticipatory activity. Several lines of evidence indicate that this anticipation is mediated by a circadian oscillator. In this work, based on the hypothesis that pre- or post-ingestive humoral signals are involved in the entrainment process, we tested whether the daily intake of glucose is sufficient to induce anticipatory activity in rats. The rhythms of motor activity and central temperature were recorded in animals undergoing 10 days of temporal glucose (solution at 50%) or chow restriction in light-dark (LD) and constant darkness (DD). Animals under temporal glucose restriction increase motor activity and and central temperature in the hours preceding glucose availability and such aticipation is extremely similar to that observed in animals under temporal chow restriction. Glucose ingestion is, therefore, a sufficient temporal cue to induce anticipation in rats. It is possible that the increase in plasma glucose after food ingestion constitutes one of the signals involved in the behavioral entrainment process to food availability
O alimento ? essencial para a sobreviv?ncia de todos os animais. Sua disponibilidade temporal ? uma pista ambiental importante para a organiza??o comportamental e fisiol?gica ao longo das 24 horas do dia em diferentes esp?cies. Ratos e camundongos, por exemplo, mostram aumento da locomo??o nas horas que antecedem a disponibilidade de alimento quando este ? apresentado de forma recorrente, um comportamento denominado de atividade antecipat?ria ao alimento. V?rias evid?ncias indicam que esta antecipa??o ? mediada por um oscilador circadiano. Neste trabalho, com base na hip?tese de que sinais humorais pr?- ou p?s-ingestivos est?o envolvidos no processo de sincroniza??o, testamos se a ingest?o di?ria de glicose ? suficiente para induzir atividade antecipat?ria em ratos. Os ritmos de atividade motora e temperatura central foram registrados em animais submetidos a 10 dias de restri??o de glicose (solu??o a 50 %) ou ra??o em claro-escuro (CE) 12h:12h e escuro constante (EE). Animais submetidos ? restri??o temporal de glicose mostram aumento da atividade motora e da temperatura central nas horas que antecedem a disponibilidade de glicose e tal antecipa??o ? extremamente semelhante ?quela observada em animais sob restri??o temporal de ra??o. A ingest?o de glicose ?, portanto, uma pista temporal suficiente para induzir antecipa??o em ratos. ? poss?vel que o aumento na concentra??o plasm?tica de glicose ap?s a ingest?o de alimento constitua um dos sinais envolvidos no processo de sincroniza??o comportamental ? disponibilidade de alimento
Shariat, Yazdi Ramin. "Mixed signal design flow, a mixed signal PLL case study." Thesis, University of Waterloo, 2001. http://hdl.handle.net/10012/916.
Full textSheehan, Kevin Michael. "Evolving analogue electronic signal processing circuit behaviour in hardware." Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272073.
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