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Magnuson, Scott A. "Developing New Indices for the Identification of Poor Effort." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1241808636.
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Riis-Pedersen, Ulrica. "Känner jag igen mig? : Etnisk identifikation i barnböcker sett ur ett retoriskt perspektiv." Thesis, Södertörns högskola, Institutionen för kommunikation, medier och it, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-9228.
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The purpose of this essay is to examine at how to portray characters in the stories and narratives which depicts one of these children's books and if they really have something to ethnicity and its identification to be done. The Research questions is: What are the different identification markers given, to the reading child in the books, which might indicate that the story depicts people of different ethnicities? How are the characters portrayed in the story and which role is assigned to the main character? What story is portrayed and is it relevant to an identifier can occur? The conclusions of the five children's books shows that it is important with identifications markers, to show that there are different ethnicities. For example the analysis revealed the specific features of the illustrations and how the books portrayes someone with a different ethnicity and cultural background as something exotic. In the texts, the analysis showed how it occurred ethnic differences, by explicitly demonstrating differences between the characters. It was found that the characters were produced mostly as good, happy, curious, suspicious and unsympathetic. Common to all the main characters was that they had been placed, in one for them unusual context and that they were trying to assimilate to the new situations. Depictions consisted of realism and fiction. What emerged here was that most of the stories themselves were not carrying identification purposes, most of the stories needed help with the identification markers from the illustrations, so that the reading child could understand the themes it was about. The methods used in the studies are narratology, semiotics and critical discourse analysis. In particular, I looked at the propositions, inferences, icon, index and symbol.
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Terzi, Evren. "Blind synchronization and detection of Nyquist pulse shaped QAM signals." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002997.
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Syal, Manan. "Untestable Fault Identification Using Implications." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/46173.
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Untestable faults in circuits are defects/faults for which there exists no test pattern that can either excite the fault or propagate the fault effect to an observable point, which could be either a Primary output (PO) or a scan flip-flop. The current state-of-the-art automatic test pattern generators (ATPGs) spend a lot of time in trying to generate a test sequence for the detection of untestable faults, before aborting on them, or identifying them as untestable, given enough time. Thus, it would be beneficial to quickly identify faults that are redundant/untestable, so that tools such as ATPG engines or fault simulators do not waste time targeting these faults. Our work focuses on the identification of untestable faults at low cost in terms of both memory and execution time. A powerful and memory efficient implication engine, which is used to identify the effect(s) of asserting logic values in a circuit, is used as the basic building block of our tool. Using the knowledge provided by this implication engine, we identify untestable faults using a fault independent, conflict based analysis. We evaluated our tool against several benchmark circuits (ISCAS '85, ISCAS '89 and ISCAS '93), and found that we could identify considerably more untestable faults in sequential circuits compared to similar conflict based algorithms which have been proposed earlier.Master of Science
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Smith, Finlay S. "Combining symbolic conflict recognition with Markov chains for fault identification." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/11417.
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A novel approach is presented in this thesis that exploits uncertain information on the behavioural description of system components to identify possible fault behaviours in physical systems. The result is a diagnostic system that utilises all available evidence at each stage. The approach utilises the standard conflict recognition technique developed in the well-known General Diagnostic Engine framework to support diagnostic inference, through the production of both rewarding and penalising evidence. The penalising evidence is derived from the conflict sets and the rewarding evidence is derived, in a similar way, from two sets of components both combining to predict the same value of a given variable within the system model. The rewarding evidence can be used to increase the possibility of a given component being in the actual fault model, whilst penalising evidence is used to reduce the possibility. Markov matrices are derived from given evidence, thereby enabling the use of Markov Chains in the diagnostic process. Markov Chains are used to determine possible next states of a system based only upon the current state. This idea is adapted so that instead of moving from one state to another the movement is between different behavioural modes of individual components. The transition probability between states then becomes the possibility of each behaviour being in the next model. Markov matrices are therefore used to revise the beliefs in each of the behaviours of each component. This research has resulted in a technique for identifying candidates for multiple faults that is shown to be very effective. To illustrate the process, electrical circuits consisting of approximately five hundred components are used to show how the technique works on a large scale. The electrical circuits used are drawn from a standard test set.
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Dolinsky, Jens-Uwe. "The development of a genetic programming method for kinematic robot calibration." Thesis, Liverpool John Moores University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364488.
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Sohar, Kathleen. "A qualitative investigation of Daily Show viewers symbolic constructions of identification and credibility /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010622.
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Marinthe, Gaëlle. "Approche psycho-sociale des dégradations de symboles nationaux : conséquences sur les relations intergroupes, implication de l’identification et des patriotismes." Thesis, Rennes 2, 2020. http://www.theses.fr/2020REN20003.
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Cette thèse étudie l’impact des dégradations de symboles nationaux sur les relations intergroupes et les dimensions psycho-sociales (identification et patriotismes) pouvant le moduler. Les symboles permettent de maintenir une identité sociale satisfaisante en renforçant la cohésion, la distinctivité et l’identité culturelle du groupe. En se fondant sur la théorie de l’identité sociale, nous avons postulé que les atteintes aux symboles nationaux, même commises par un membre de l’endogroupe, pourraient constituer une menace et ainsi augmenter un biais pro-endogroupe diffus. Ces conséquences pourraient être modérées par l’identification au groupe et par un mode d’attachement rigide à la nation, i.e., le patriotisme aveugle. Ces questions ont été traitées à travers quatre chapitres expérimentaux. Les trois premiers examinent les implications des dégradations de symboles nationaux et de l’identification sur les attitudes intergroupes. Dans l’ensemble, l’identification n’explique pas l’émergence de biais pro-endogroupe. En revanche, le contexte est déterminant. Une dégradation du symbole national effectuée par un membre de l’endogroupe dans un contexte intergroupe (compétition sportive) ou intragroupe implique des stratégies de défense respectivement intergroupe (hausse du biais pro-endogroupe) et intragroupe (hausse de l’identification). Dans le quatrième chapitre, le patriotisme aveugle modère les conséquences d’une dégradation de symbole national endogroupe en contexte intragroupe. Les personnes les plus patriotes aveugles ressentent plus de menace, provoquant une augmentation diffuse du biais pro-endogroupe. Les apports, limites et perspectives de ces travaux sont discutésThe aim of this thesis is to study the impact of national symbols’ desecration on intergroup relations and socio-psychological factors (identification and patriotism) that may moderate these consequences. Because they strengthen the cohesiveness, distinctiveness and cultural identity of a group, national symbols ensure a secure social identity. Based on social identity theory, we hypothesized that symbol desecration, even if perpetrators are ingroup members, would constitute a threat and thus provoke a diffuse pro-ingroup bias. Intergroup consequences could be moderated by rigid or conservative identification with the national group, i.e., blind patriotism. These issues are explored in four experimental chapters. The first three chapters examine implications of desecrating a national symbol and group identification on intergroup attitudes. On the whole, identification does not explain increases in pro-ingroup bias when symbols are harmed. However, context is determinant. The desecration of a national symbol by an ingroup member in an intergroup (sport competition) or intragroup context leads to strategies of intergroup (increase in pro-ingroup bias) or intragroup (increase in identification) defense, respectively. The fourth chapter shows that blind patriotism is a moderator of consequences of an ingroup national symbol’s desecration in an intragroup context. Higher blind patriots perceive more threat, resulting in an increased and diffuse proingroup bias. Contributions, limits and perspectives of this research are discussed
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Carvalho, Isabel Maria Correia. "Entre a realidade e a fantasia." Master's thesis, Instituto Superior de Psicologia Aplicada, 2004. http://hdl.handle.net/10400.12/409.
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Quade, Markus [Verfasser], and Markus [Akademischer Betreuer] Abel. "Symbolic regression for identification, prediction, and control of dynamical systems / Markus Quade ; Betreuer: Markus Abel." Potsdam : Universität Potsdam, 2018. http://d-nb.info/1218404124/34.
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Zhang, Ying. "Symbolic Regression of Thermo-Physical Model Using Genetic Programming." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1316.
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The symbolic regression problem is to find a function, in symbolic form, that fits a given data set. Symbolic regression provides a means for function identification. This research describes an adaptive hybrid system for symbolic function identification of thermo-physical model that combines the genetic programming and a modified Marquardt nonlinear regression algorithm.
Genetic Programming (GP) system can extract knowledge from the data in the form of symbolic expressions, i.e. a tree structure, that are used to model and derive equation of state, mixing rules and phase behavior from the experimental data (properties estimation).
During the automatic evolution process of GP, the function structure of generated individual module could be highly complicated. To ensure the convergence of the regression, a modified Marquardt regression algorithm is used. Two stop criteria are attached to the traditional Marquardt algorithm to enforce the algorithm repeat the regression process before it stops.
Statistic analysis is applied to the fitted model. Residual plot is used to test the goodness of fit. The χ2-test is used to test the model's adequacy.
Ten experiments are run with different form of input variables, number of data points, standard errors added to data set, and fitness functions. The results show that the system is able to find models and optimize for its parameters successfully.
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Cannon, John Morrison. "An Identification of Themes in The Charted Course of the Church in Education." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2237.
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This thesis operates under the assumption that the earliest form of mass communication is the religious sermon as recorded in the Bible. This thesis looks to Bormann, who used a sacred to secular approach and found similarities between Puritan sermons and the rhetoric of political speeches. This research reverses that order and moves from secular to sacred by looking first at well-known American speeches and then at landmark addresses to Seminary and Institutes of Religion teachers of The Church of Jesus Christ of Latter-day Saints—and specifically at Clark's The Charted Course of the Church in Education. This single sermon, delivered in 1938, continues to shape the Seminary and Institutes program after more than seven decades. With the opening of the first LDS Seminary in 1912, the foundations of the program were laid. Yet, each generation seemed to drift away from those foundations enough that a realignment was needed. In 1938, the constitution of Church education was given in the form of the Charted Course and it has served as the realigning document ever since. Subsequent realignments occurred in 1954, and 1963. Since 1976, the Charted Course has been referenced regularly, particularly during the annual Evening with a General Authority address to Seminary and Institute teachers and, consequently, since that time, no great drift has occurred that required another major realignment. Instead, the Charted Course is now used consistently to prevent drift, not only to correct it.
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Winston, Summer D. "Not Just a Symbol But a Status Symbol." ScholarWorks@UNO, 2012. http://scholarworks.uno.edu/td/1505.
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I create art, not out of a deep understanding of the world around me, but out of a lack of one. Human psychology, motives, behaviors, stressors, intentions and identity are the themes that boggle me the most. Therefore, it is only natural that my work would be fueled by the questions these themes pose. In the past I sought to understand what pushes people to make certain choices and how can the world around us affect the formation of identity. Currently I wonder about identity in terms of what do people use to form and reinforce identity both real and fabricated. In addition to this I am working through the question of what creates worth for an object; it’s function or its fabricated identity. Through the use of photography, video, sculpture and installation I explore the possibilities of questions and also understandings that my work can create.
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Edelsward, L. M. 1958. "Sauna as symbol." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63982.
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Rengensjö, Catharina, and Johanna Åkesson. "Bonus som symbol." Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19489.
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Bonus har under våren 2009 varit ett starkt kritiserat ämne. Flertalet skandaler har varitbelysta av media, ledare har antingen tagit emot eller efter kritik avstått från bonus i denrådande lågkonjunkturen. I denna studie behandlar vi det omtvistade ämnet bonus som ensymbol där vi söker förståelse för laddningen ordet bonus har fått. För att komma så näraverkligheten som möjligt valde vi att utföra en kvalitativ fallstudie på två företag somanvänder symbolen bonus. Studien kommer inte att resultera i en generaliseringsteoribland företag i allmänhet utan ämnar inge förståelse för specifika situationer.Förhållandet kring varje företag är unikt och måste då också behandlas därefter, studienkommer därför visa hur det kan vara inte hur det är.Vi kommer i studien ta er genom tre steg med början i empirin, för att sedan låta dig tadel av vår tolkning av ordet bonus. Slutligen hamnar vi i skedet där vi själva övertarförfattarrollen och förtydligar vikten av att tänka efter före.Vår hypotes är: Det kan vara ordet bonus som är laddat.Under resans gång upptäckte vi att symbolen innehöll oväntade egenskaper som varavgörande för studiens resultat vilket har fått oss att se bonus på ett helt nytt sätt.
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James, Calvin L. "Optimum Symbol Synchronization." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611676.
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International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, CaliforniaAlthough most closed-loop synchronizers employ maximum likelihood estimators for symbol value decisions, in general, their symbol timing estimates are not optimum. It would seem only natural that an optimum timing estimator would choose interval partitions based on maximizing the observed sample signal-to-noise ratio. The symbol synchronizer described below achieves optimum performance when decisions on present symbol values are based on current and previously-received symbol samples. This procedure attempts to reestablish the interval independence criterion, thereby reducing timing estimator variance. The realization presented is motivated by an open-loop maximum a posteriori (MAP) structure analysis.
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Calba, Romain. "L'identification nationale dans la France contemporaine. Les formes de l'investissement symbolique dans l'idée de nation." Thesis, Montpellier 3, 2013. http://www.theses.fr/2013MON30016.
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Cette recherche se concentre sur l'analyse des modélisations de l'imaginaire national dans la France contemporaine. A la lumière du processus de mondialisation et de ses multiples dimensions, la forme nationale semble être prise dans l'alternative entre une uniformisation au mépris des « cultures » nationales, et d'autre part une exacerbation des singularités culturelles nationales, la forme nationale étant associée à une valeur positive dans un monde en « crise ». Face à l'alternative entre une loi de succession des formes de groupement et l'essentialisation d'une réalité nationale irréductible, cette recherche aborde la question nationale par l'étude de contenus contemporains de formes symboliques d'objectivation de l'imaginaire national. A partir de l'observation de matérialisations de l'idée de nation, il s'agit de s'attacher aux opérations concrètes de représentation nationale et leur intégration dans des contextes d'énonciation de la « réalité »nationale. Dans un premier temps, l'étude des mots de la nation aborde la construction de la forme nationale comme objet sociologique et les modalités contemporaines de son énonciation, particulièrement les investissements autour de la question de l'identité nationale. Ensuite, à partir de l'image comme forme symbolique d'énonciation des groupes sociaux, nous avons étudié une matérialité particulière de l'imaginaire national, la production philatélique nationale, permettant d'observer les modulations de l'image sociale de la nation. Enfin, l'étude empirique des cérémonies d'accueil dans la citoyenneté française permet d'observer les contenus et frontières contemporaines de l'identification nationale à partir de sa mise en pratiqueThis study is focused on the analysis of the modellings of the national imagination in contemporary France. With the globalization and its multiple dimensions, the national existence seems to be taken in this alternative: on one hand a standardization in defiance of the national "cultures", and on the other hand an exacerbation of the national cultural peculiarities, the national shape being associated with a positive value in a world in "crisis". Contrary to the alternative between a law of succession of the groups and an essentialisation of an inflexible national reality, this study approaches the national question by the study of contemporary contents of the national imagination symbolic forms. From the observation of the contemporary modulations of their contents, this study is based on the observation of concrete operations of national representation and their integration in contexts of the national "reality" statement. At first, the studyof nation's words approaches the construction of the national shape as sociological object and the contemporary modalities of the national shape statement, particularly the investments around the national identity. Then, from the image as a symbolic shape of social groups statement, we studied a particular materiality of the national imagination, the national philatelic production, which allows to observe the modulations of the nation's social image. Finally, the empirical study of citizenship ceremonies allows to observe the contemporary contents and borders of the national identification from its application
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Callan, R. E. "Netting the symbol : analytically deriving recursive connectionist representation of symbol structures." Thesis, Southampton Solent University, 1996. http://ssudl.solent.ac.uk/2427/.
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With the huge research effort into connectionist systems that has taken place over the last decade a debate has developed as to whether the more traditional Artificial Intelligence (AI) paradigm of symbolism or the connectionist paradigm offers the way ahead to developing high level cognitive systems. Central to the debate are issues of representation. Traditional AI has spent many years developing representation languages and representation has long been seen as essential for the development of intelligent systems. Early connectionists have tended to rely on the notion that a network of simple processing units will develop adequate internal representations as a by product of learning. Indeed, with connectionism it would appear on first sight that the development of a representational formalism is somewhat intractable when knowledge is implicit in a distributed pattern of activity. Contrary to this view, some connectionists have agreed with the traditionalists that the mechanism of represnetation must support compositional construction and be understood. Some connectionists would even go as far to say that the representation mechanism should be understood to the point whereby an explicit or easily read description of the knowledge held by a network can be given. This thesis presents some of the key issues which arise when attempting symbol style representations with connectionist architectures. A number of connectionist techniques are reviewed. The emphasis of this thesis is on the presentation of a model that provides a simplified version of a connectionist system that was developed to represent symbol structures. The model is the result of the research reported herin and provides an original contribution in a number of important areas. The model has the benefit of allowing very quick derivation of connectionist representatiions, unlike the slow training environments of a pure network implementation. The model provides a mathematical framework that gives insight into the convergence behaviour of the technique it proposes and this framework allows a statement to be made about generalisation characteristics. The model has immediate practical use in supplying connectionist representations with which to experiment and provides a conceptual cehicle that should assist with the development of future techniques that tackle representation issues.
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Renman, Pia. "Tjänstegarantin : Verktyg eller symbol?" Licentiate thesis, Karlstads universitet, Handelshögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-29267.
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For several decades, there has been a transfer of ideas from the private sector to the public sector on how to modernize the organization. One widespread idea is the service guarantee. However, when ideas are transferred from one domain to another and implemented in a different context, they are also always transformed. This report centres on what happened in practice when service guarantees were introduced into two Swedish municipalities. The purpose of the study is to investigate how the employees perceived the implementation of a public service guarantee and its impact on the employees in the organization. The study points to the difficulty of transferring the service guarantee idea to the public sector and to reproduce it successfully. The study indicates that the existence of the service guarantee is questioned, and gives rise to new goal conflicts when operating plans are made. Employees expect managers to be committed, while describing a status quo situation. The study indicates that the service guarantee has only become an unexploited symbolic tool in the development of quality assurance.Offentlig sektor har sedan flera decennier tillbaka hämtat idéer från den privata sektorn för att modernisera organisationen. En idé som fått en stor spridning är tjänstegarantier. När idéer ska hämtas ut, överföras och införas mellan olika kontexter sker alltid en omformning av idén. Denna rapport berör vad som händer i praktiken när tjänstegarantier har införts i två svenska kommuner. Studiens syfte har varit att undersöka hur anställda upplever implementeringen av tjänstegarantier och vilka konsekvenser tjänstegarantin får för anställda i organisationen. Resultaten från studien visar på svårigheten att fånga idén med tjänstegarantier och att reproducera idén framgångsrikt. Av studien framgår det att tjänstegarantins existens är ifrågasatt och när verksamheten ska planeras uppstår nya målkonflikter. Anställda efterfrågar chefernas engagemang samtidigt som anställda beskriver en obetänksam tillbakastyrning. Studien pekar på att tjänstegarantin bara blivit ett symboliskt verktyg i utvecklingen av kvalitet.
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Votočková, Kateřina. "Symbol a mimické divadlo." Master's thesis, Akademie múzických umění v Praze.Hudební a taneční fakulta. Knihovna, 2016. http://www.nusl.cz/ntk/nusl-253850.
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The aim of the thesis is to survey the connections among basic concepts like symbol, archetype, story in connection with their use in physical theatre. The symbol itself is more visual than verbal and therefore it works as one of the basic elements of the physical theater production. By defining common definitions seen in the wider context associated with the concepts of physical theater – whether it's mimésis, sign, symbol or archetype – the thesis aims towards the essence of the nonverbal dramatic works, namely the plot and the story. I link overall conclusions of researched terms and practical production concept on example of project Uroboros by Barbora Debnárová.
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Fiddes, Nick. "Meat : a natural symbol." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/19741.
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Park, Sang Woo. "Efficient blind symbol rate estimation and data symbol detection algorithms for linearly modulated signals." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2729.
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Gertsman, Michael J. (Michael Joel) Carleton University Dissertation Engineering Systems and Computer. "Symbol-by-symbol map demodulation of CPM signals transmitted on Rayleigh flat-fading channels." Ottawa, 1996.
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Gåfvels, Camilla. "Laurus nobilis : symbol och praktik." Thesis, Konstfack, Institutionen för Bildpedagogik (BI), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-534.
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Examensarbetet behandlar frågor om synen på hantverk och vilken betydelse det har på gymnasieskolans hantverksprogram. Huvudfrågeställningen är vad "hantverk" betyder utifrån Skolverkets styrdokument om hantverksprogrammet. Hantverksbegreppet undersöks ur flera betydelsenivåer. Idén om hantverk och dess påverkan på den enskilde individen synliggörs. Skolverkets styrdokument för hantverksprogrammet undersöks, eftersom de är grunden för den dagliga verksamheten på Sveriges hantverksprogram. Som designpedagogiskt projekt har fyra elever som läser på floristprogrammet fått tillverka en lagerkrans. Projektet gick ut på att deltagarna skulle läras sig binda en lagerkrans med en hantverksmässig och traditionell teknik. Kransarna tolkades och utvärderades mot några av kursmålen och betygskriterierna för kursen Hantverksteknik C. Projektet synliggjorde att lagerkransen bär på traditioner som upprätthåller åtskillnad mellan teori och praktik. Huvudresultatet från undersökningen visar att det är problematiskt att upphöja hantverk till en kreativ verksamhet som samtidigt ska vara traditionsbevarande. Vidare framgår det av undersökningen att det är diskutabelt att placera olika skilda hantverk inom ett enhetligt gymnasieprogram. Resultatet redovisas med fotografier från genomförd workshop och en lagerplanta. Gestaltning och uppsats bidrar förhoppningsvis till en diskussion om hantverkets roll i det svenska skolväsendet och samhället i stort.
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DeSantis, Gary G. "Penn State: Symbol and Myth." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002889.
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Horvitz, Richard P. "Symbol Grounding Using Neural Networks." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337887977.
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Chandran, Prashanth. "SYMBOL TIMING RECOVERY FOR SOQPSK." International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604518.
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ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, NevadaShaped offset quadrature phase shift keying (SOQPSK) is a highly bandwidth efficient modulation technique used widely in military and aeronautical telemetry standards. It can be classified as a form of continuous phase modulation (CPM), but its major distinction from other CPM schemes is that it has a constrained (correlated) ternary data alphabet. CPM-based detection models for SOQPSK have been developed only recently. One roadblock standing in the way of these detectors being adopted is that existing symbol timing recovery techniques for CPM are not always applicable since the data symbols are correlated. We investigate the performance of one CPM-based timing error detector (TED) that can be used with SOQPSK, and apply it to the versions of SOQPSK used in military (MIL-STD SOQPSK) and telemetry group (SOQPSK-TG) standards. We derive the theoretical performance limits on the accuracy of timing recovery for SOQPSK, as given by the modified Cramer-Rao bound (MCRB), and show that the proposed TED performs close to these bounds in computer simulations and is free of false-lock points. We also show that the proposed scheme outperforms a non-data aided TED that was recently developed for SOQPSK. These results show that the proposed scheme has great promise in a wide range of applications due to its low complexity, strong performance, and lack of false-lock points.
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Zhang, Ying. "Synthesis of Local Thermo-Physical Models Using Genetic Programming." Scholar Commons, 2009. https://scholarcommons.usf.edu/etd/103.
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Local thermodynamic models are practical alternatives to computationally expensive rigorous models that involve implicit computational procedures and often complement them to accelerate computation for real-time optimization and control. Human-centered strategies for development of these models are based on approximation of theoretical models. Genetic Programming (GP) system can extract knowledge from the given data in the form of symbolic expressions. This research describes a fully data driven automatic self-evolving algorithm that builds appropriate approximating formulae for local models using genetic programming. No a-priori information on the type of mixture (ideal/non ideal etc.) or assumptions are necessary.
The approach involves synthesis of models for a given set of variables and mathematical operators that may relate them. The selection of variables is automated through principal component analysis and heuristics. For each candidate model, the model parameters are optimized in the inner integrated nested loop. The trade-off between accuracy and model complexity is addressed through incorporation of the Minimum Description Length (MDL) into the fitness (objective) function.
Statistical tools including residual analysis are used to evaluate performance of models. Adjusted R-square is used to test model's accuracy, and F-test is used to test if the terms in the model are necessary. The analysis of the performance of the models generated with the data driven approach depicts theoretically expected range of compositional dependence of partition coefficients and limits of ideal gas as well as ideal solution behavior. Finally, the model built by GP integrated into a steady state and dynamic flow sheet simulator to show the benefits of using such models in simulation. The test systems were propane-propylene for ideal solutions and acetone-water for non-ideal. The result shows that, the generated models are accurate for the whole range of data and the performance is tunable. The generated local models can indeed be used as empirical models go beyond elimination of the local model updating procedures to further enhance the utility of the approach for deployment of real-time applications.
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Schnurr, Alexander. "The Symbol of a Markov Semimartingale." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244626491491-70401.
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We prove that every (nice) Feller process is an It^o process in the sense of Cinlar, Jacod, Protter and Sharpe (1980). Next we generalize the notion of the symbol and define it for this larger class of processes. As examples the solutions of stochastic differential equations are considered. The symbol is then used to derive a quick approach to the semimartingale characteristics as well as the generator of the process under consideration. Finally we give some examples of how our methods work for processes used in mathematical financeWir haben gezeigt, dass jeder (nette) Feller Prozess ein It^o Prozess im Sinne von Cinlar, Jacod, Protter und Sharpe (1980) ist. Es stellt sich heraus, dass man den Begriff des Symbols, der für Feller Prozesse bekannt ist, auf diese größere Klasse verallgemeinern kann. Dieses Symbol haben wir für die Lösungen verschiedener stochastischer Differentialgleichungen berechnet. Außerdem haben wir gezeigt, dass das Symbol einen schnellen Zugang zur Berechnung der Semimartingal-Charakteristiken und des Erzeugers eines It^o Prozesses liefert. Zuletzt wurden die Ergebnisse auf Prozesse angewendet, die in der Finanzmathematik gebräuchlich sind. - (Die Dissertation ist veröffentlicht im Shaker Verlag GmbH, Postfach 101818, 52018 Aachen, Deutschland, http://www.shaker.de, ISBN: 978-3-8322-8244-8)
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Musioł, Anna. "Westerplatte : Gemeinsamer Erinnerungsort oder gespaltenes Symbol?" Universität Potsdam, 2010. http://opus.kobv.de/ubp/volltexte/2010/4130/.
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Für die polnische Geschichtswahrnehmung stellt die Westerplatte – eine kleine Halbinsel bei Gdańsk – ein Symbol des heldenhaften Widerstandes und des aussichtslosen Kampfes gegen Nazi-Deutschland dar. Zu der Gedenkfeier anlässlich des 70. Jahrestags des Kriegsbeginns haben sich am 1. September 2009 auf der Westerplatte rund 20 europäischen Staats- und Regierungschefs versammelt. Die Inhalte, die in den Reden der zentralen Akteure der Gedenkfeier signalisiert wurden, bilden wichtige Referenzpunkte in der nationalen wie supranationalen Aufarbeitung der tragischen Geschichte des vergangenen Jahrhunderts. Im Mittelpunkt des Papers steht das Problem der Wahrnehmung der Geschichte des Zweiten Weltkrieges, das hier an den Auslegungsprozessen in Hinblick auf die Figur Westerplatte an den vier zentralen Reden der Spitzenpolitiker verfolgt und diskursanalytisch ausgewertet wird.
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Pakiam, Eliason Barbro. "Brudkronor i Tjust : koncept, symbol, funktion." Thesis, Linköpings universitet, Konstvetenskap och visuell kommunikation, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-88785.
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This essay comprises a study of the bridal crowns of Tjust, with respect to their national history, concept and aspect of mythological symbol. The tradition of bearing the parochial bridal crown is closely associated with religious medieval politics, and has also come to include elements of superstition and folklore. Attention is paid to these aspects dealing with the position of the bridal crown within current forms of tradition and culture and the impact on brides of this day and age. As the tradition of Church-owned bridal crowns is intrinsic to this country, and especially in the area of which Tjust is a part, possible solutions to the continued tradition are investigated.
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Polster, Joshua E. "Rethinking Arthur Miller : symbol and structure /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/10212.
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Pan, Xinyue. "Symbol synchronization in OFDM-based systems." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39793850.
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Pan, Xinyue, and 潘新月. "Symbol synchronization in OFDM-based systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39793850.
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Day, Charles Robert. "Symbol processing in RAAM neural networks." Thesis, Keele University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296075.
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The ability to construct and manipulate recursive symbol structures is regarded as fundamentally important in the domain of cognitive modelling. The aim of this thesis dissertation is to explore how well Pollack's Recursive Auto-Associative Memory (RAAM) networks can represent and facilitate the manipulation of highly-recursive structures. Using mainly skewed and balanced binary trees, the representational power of the RAAM architecture is examined for structures which are lexically simple and syntactically complex. This is in contrast to much published work on RAAM networks, in which the structures encoded are lexically complex but syntactically simple. A new RAAM tree-processing operation, which allows partial information about a set of siblings to be used as a parent pointer, is described and tested. Several empirical investigations are motivated and carried out, to determine how effectively RAAM networks can encode highly-recursive structures. The investigations demonstrate the sensitivity of the RAAM architecture with respect to the initial conditions, training parameters and the training strategies used. This work also introduces some new techniques which help to address the twin problems of extended training times and obtaining successful RAAM encodings. A completely new method for performing terminal detection is presented as well as a technique for refining Pollack's (1990) terminal detection method. In both cases, the rate at which successful RAAM encodings are obtained is significantly better than using Pollack's method. In addition, the new implicit terminal detection method might allow improved RAAM generalisation, although this conjecture has not yet been tested.RAAM networks have been used as an important counter-example to influential analyses of the shortcomings of connectionist cognitive models. The limited success of the RAAM networks in this study brings into question connectionist hopes for an effective RAAM-based cognitive model.
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Engvall, Markus, and Johanna Teljing. "Colour a Symbol : Autentisering för smartphones." Thesis, Uppsala universitet, Institutionen för informatik och media, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226771.
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Under de senaste åren har den mobila tekniken i stort sett helt gått över till smartphones. Smartphones är i princip mer datorer än telefoner, som vi alltid bär med oss och som innehåller allt mer känslig information. Detta medför att kraven på säkerheten kring enheten ökar. Detta arbete undersöker om det är möjligt att finna en ny metod att låta användaren autentisera sig på, som är säkrare än de som är vedertagna idag, men samtidigt har liknande nivå av användbarhet. Vår idé, som vi arbetar med under namnet Colour a Symbol, baseras på att kombinera symboler och färger i par. För att utveckla idén skapade vi en funktionell prototyp, som sedan utvärderadesmed hjälp av en mindre testgrupp. Empirin visar på att Colour a Symbol har en god användbarhet, om än något för lång inloggningstid. Idéer för att förbättra inloggningstiden presenteras. Teoretiskt sett så är Colour a Symbol säkrare än exempelvis pinkod, men testgruppen var inte tillräckligt stor för att kunna bedöma den praktiska lösenordsrymden. Utformning av symboltema påverkar även förmodligen i hög grad den praktiska lösenordsrymden. Vår slutsats är att idén har en klar potential, men att det behövs ytterligare studier för att finslipa den.During the past years mobile technology has moved almost entirely to smartphones. Smartphones are in essence more computers than phones, which we always carry with us and that contain ever more sensitive information. This requires that the level of security around the device increases. This study strives to find a new method of authenticating users, that is more secure than those that are established today, but at the same time has a similar level of usability. Our idea, which we work with under the name Colour a Symbol, is based upon making combinations of symbols and colours in pairs. In order to develop the idea we created a functional prototype, that was evaluated by a smaller test group. The empirical data implies that Colour a Symbol has good usability, if only a little too long login time. Ideas as to shorten the login time are suggested. Theoretically, Colour a Symbol is more secure than for an example pincode, but the test group was not large enough to estimate the practical password space. Design of the symbol theme probably also affects the practical password space to a high degree. Our conclusion is that the idea has clear potential, but that further studies are needed to fine-tune it.
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Cavendish, Sarah E. ""The West Wing" : President as symbol." Huntington, WV : [Marshall University Libraries], 2002. http://www.marshall.edu/etd/descript.asp?ref=63.
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Hart, Alexandra N. "Form as symbol : allure and defense /." Online version of thesis, 1994. http://hdl.handle.net/1850/11926.
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Friedemann, Monika. "Die Stadt als Symbol der Seele /." Zürich : ADAG, 1993. http://catalogue.bnf.fr/ark:/12148/cb35615907d.
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Kwack, Elizabeth S. (Elizabeth Sey-Kyung). "Church housing : a symbol of hospitality." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/62976.
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Thesis (S.B. in Art and Design)--Massachusetts Institute of Technology, Dept. of Architecture, 2002."June 2002." Unpaged. Cataloged from PDF version of thesis.
This project is located in Bloomfield, NJ. Less than fifteen miles from New York City, the Township of Bloomfield was first settled by the Dutch in 1691 and later by the English in 1719. In 1812, the State of New Jersey finally incorporated Bloomfield as a township. Until then, it had been a parish of the city of Newark. The Township took its name from the Bloomfield Presbyterian Church. This church was named for General Joseph Bloomfield, the fourth Governor of New Jersey and the first Governor to be born in New Jersey Bloomfield prides itself on its rich historical background. In 1830, a town resident David Oakes established a woolen mill. This mill prospered and provided employment for hundreds of immigrants and among its various materials, uniforms for the Union Army in the Civil War. In addition, the Township housed many military leaders including General George Washington during the American Revolution. Moreover, the community's Green functioned as a military training ground during the war. Today, it remains among the most attractive features of Bloomfield. The Township Green and its surrounding buildings, including the Oakes' mansion, which is now used as a performing arts center, have been recognized as a historic district. In 1945, the Bethany United Presbyterian Church purchased a tract of property from the Township of Bloomfield. Like Bloomfield, this church has a meaningful history. Though the construction of the church building itself began in 1945, the church as a congregation became established years earlier. Its original meeting place was a local storefront just up the street of the now existing church. In 1947, the Bethany congregation marched down the street to its present location. It was a very ceremonial event that marked years of planning, prayer, hard work, and the faith of church leaders and members alike. In expressing the church's interest in obtaining the land, Reverend William H. Neebe, on behalf of Bethany's Board of Trustees wrote to the Bloomfield Town Council, "We believe that as a church we are rendering a public service to the community Our only reason for existence is for service to the town and community... .Anything that aids the church enhances the opportunity that the church has to serve the community."
by Elizabeth S. Kwack.
S.B.in Art and Design
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Schnurr, Alexander. "The Symbol of a Markov Semimartingale." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23843.
Full textAbstract:
We prove that every (nice) Feller process is an It^o process in the sense of Cinlar, Jacod, Protter and Sharpe (1980). Next we generalize the notion of the symbol and define it for this larger class of processes. As examples the solutions of stochastic differential equations are considered. The symbol is then used to derive a quick approach to the semimartingale characteristics as well as the generator of the process under consideration. Finally we give some examples of how our methods work for processes used in mathematical finance.Wir haben gezeigt, dass jeder (nette) Feller Prozess ein It^o Prozess im Sinne von Cinlar, Jacod, Protter und Sharpe (1980) ist. Es stellt sich heraus, dass man den Begriff des Symbols, der für Feller Prozesse bekannt ist, auf diese größere Klasse verallgemeinern kann. Dieses Symbol haben wir für die Lösungen verschiedener stochastischer Differentialgleichungen berechnet. Außerdem haben wir gezeigt, dass das Symbol einen schnellen Zugang zur Berechnung der Semimartingal-Charakteristiken und des Erzeugers eines It^o Prozesses liefert. Zuletzt wurden die Ergebnisse auf Prozesse angewendet, die in der Finanzmathematik gebräuchlich sind. - (Die Dissertation ist veröffentlicht im Shaker Verlag GmbH, Postfach 101818, 52018 Aachen, Deutschland, http://www.shaker.de, ISBN: 978-3-8322-8244-8)
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Gauthier, Patricia. "The Eucharist as Symbol and Reality." Thesis, Regent University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10932876.
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This work examines the theological interpretation that the nature of the Eucharist is the actual body and blood of Christ ingested by the participants at the Lord’s Table. It proposes that the keys to unlocking the mystery of the Eucharist are reexaminations of the Old Testament typology of the “Bread of the Presence,” and the New Testament patristic understanding of symbol and reality that point to the Real Presence of Christ in the Eucharist. These comprehensions serve renewal hermeneutics by advancing Eucharistic theology toward three goals: they provide insights that inform and facilitate our experience of Christ’s Real Presence in the assembly of the Lord’s Table, they call contemporary culture to satisfy their deep longing to experience the Presence of the Living God through Holy Communion, and they recall the hope that Jesus’ prayer in John 17: 20–23 for unity of his one body may be realized.
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Hampton, Andrew J. "Symbol Grounding in Social Media Communications." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527171552994976.
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Hou, Wenshuai. "On the Simulation Performance of FEC SOQPSK-TG Systems with Symbol by Symbol and SOVA Decoding Methods." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595638.
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ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, NevadaA number of encoding and decoding methods for SOQPSK-TG are evaluated with their simulation performance under additive white Gaussian noise (AWGN) channel. The two forward error correction (FEC) codes are serial concatenated convolutional code (SCCC) and low-density parity-check code (LDPC). Two decoding methods are applied: soft-output Viterbi algorithm (SOVA) and symbol by symbol (SxS) detection. Pulse amplitude modulation (PAM) and pulse truncation (PT) filters are designed for SOVA decoding, and numerically optimum (NO) and integrate and dump (I&D) filters are employed for the SxS methods. We discuss the performance of these schemes by comparing and analyzing their Matlab simulation. The LDPC and SOVA with PAM filter outperforms over all the other combinations. We also use timing and phase recovery with various loop bandwidths. The system structures and the synchronization technique are discussed in this paper.
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Eisenmann, Isabel. "Fanfaren, Jazz und Jericho ? : die Symbolik der Trompete im 20. Jahrhundert." Marburg Tectum-Verl, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=2996149&prov=M&dokv̲ar=1&doke̲xt=htm.
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Maanane, Yassine. "Identification expérimentale de propriétés radiatives à partir de méthodes Monte Carlo Symbolique : Application aux matériaux hétérogènes à haute température." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI093.
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Ce travail s’inscrit dans le cadre de l’étude des transferts de chaleur par rayonnement dans des matériaux hétérogènes utilisés dans des applications haute température, comme la sécurité incendie dans le bâtiment, l’isolation de fours ou la protection thermique dans l’aérospatial. Ces matériaux hétérogènes en structure et/ou en composition s’avèrent être des milieux semi-transparents qui absorbent et qui diffusent le rayonnement thermique, et leurs propriétés radiatives à haute température sont souvent inconnues. Afin de modéliser avec précision le rayonnement au sein de ces matériaux et de quantifier la part du rayonnement par rapport aux autres modes de transferts de chaleur, il est nécessaire de déterminer leurs propriétés radiatives d’absorption et de diffusion. Dans le cadre de cette thèse, ces propriétés sont identifiées par méthode inverse à partir de modèles de rayonnement et de mesures spectrométriques. L’identification expérimentale permet d’accéder aux propriétés radiatives dans des conditions de température proches des conditions d’utilisation du matériau d’intérêt. Pour mener à bien l’analyse du problème inverse, nous proposons et développons ici une méthodologie se basant sur des méthodes Monte Carlo Symbolique (MCS). Celles-ci permettent d’exprimer les flux radiatifs sous la forme d’une fonction simple de paramètres dits symboliques. Un seul calcul permet ainsi d’exprimer les flux sur tout l’espace des paramètres, ce qui s’avère très utile dans une démarche d’inversion. Ces méthodes sont particulièrement adaptées pour exprimer des grandeurs radiatives en fonction de la température, du coefficient d’absorption et du coefficient de diffusion. Dans cette thèse, nous proposons une nouvelle méthode symbolique basée sur un développement en séries de polynômes orthogonaux, permettant d’étendre la méthode MCS à d’autres types de paramètres (géométriques, fonction de phase, etc.). Les expressions de flux radiatif en fonction des propriétés radiatives obtenues par MCS permettent de déterminer si le problème inverse est bien-posé et d’identifier rapidement les propriétés radiatives, tout en prenant en compte les incertitudes expérimentales et numériques. D’autre part, dans le cas où le problème inverse est mal-posé, l’outil proposé permet d’analyser l’apport d’informations supplémentaires par d’autres modèles ou d’autres types de mesures pour l’identification. Dans cette thèse, nous appliquons cette méthodologie à l’identification des propriétés radiatives du Quartzel, famille de matériaux hétérogènes constitués de fibres de QuartzThis work is about radiative heat transfer in heterogeneous materials used in high temperature applications, such as fire safety in buildings, insulation of furnaces or thermal protection for aerospace vehicles. These semitransparent materials with heterogeneous structure absorb and scatter thermal radiation, and their radiative properties at high temperatures are generally unknown. In order to accurately model radiative transfer within these materials and to quantify the impact of radiation in the global heat transfer, it is necessary to determine absorption and scattering radiative properties. In this thesis, these properties are identified by inverse method from radiative models and spectrometric measurements. Experimental identification from spectrometric measurements provides radiative properties at temperature levels close to real operating conditions for the material of interest. To carry out the analysis of the inverse problem, we develop here a methodology based on Symbolic Monte Carlo (SMC) methods. These methods allow expressing radiative fluxes as a simple function of the so-called symbolic parameters. A single calculation expresses radiative fluxes overall the parameter space, which turns out to be very useful in an inversion approach. These methods are particularly suitable for expressing radiative quantities as a function of temperature, of absorption and scattering coefficients. In this thesis, we also propose a new symbolic method based on a series expansion of orthogonal polynomials, allowing the extension of SMC methods to other types of parameters (geometric, phase function, etc.). Expressions of radiative fluxes as functions of radiative properties obtained by SMC are employed to analyze if the inverse problem is well-posed and to efficiently identify the radiative properties, while taking into account the experimental and numerical uncertainties. On the other hand, if the inverse problem is ill-posed, this method can analyze the input of other types of measurements that may allow the identification. The methodology is applied in this work to the identification of radiative properties of a family of heterogeneous materials composed of Quartz fibers
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Snårelid, Maria. "Entre identification et différenciation : La mère et l’amour dans la constitution de l’identité féminine dans La fille démantelée, La plage d’Ostende et Orlanda de Jacqueline Harpman." Doctoral thesis, Stockholms universitet, Institutionen för franska, italienska och klassiska språk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62272.
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The aim of this dissertation is to investigate the importance of the mother figure for the definition of the female identity in three novels by the Belgian writer and psychoanalyst Jacqueline Harpman: La fille démantelée, La plage d’Ostende and Orlanda. This perspective is largely motivated by the specific character of the mother-daughter relation which is crucial to the formation of female identity. Freud already argued that it was impossible to understand the female identity without considering a woman’s preœdipal fixation to her mother. The analysis of the three novels is based on the concept of what Kristeva terms primary narcissism, which represents a delicate stage in the relationship between mother and child. In different ways, the analyzed novels are permeated by an oscillation between identification and differentiation. On a thematic level, the female protagonist’s desire to distance herself from the mother is always countered by an awareness of an intimate bond with her, and, paradoxically, it may seem, that the differentiation from the mother opens the way for a happy reunion between mother and daughter, now two individuals who no longer form a symbiotic unit. In this process of individuation described in the novels, a third instance which Freud called father of individual prehistory is crucial. Even though, at first sight, love appears to be the most important theme in the works of Harpman, this thesis argues that the theme of love is intimately linked to that of the mother figure and that it is necessary to read the works of Harpman through the spectrum of the mother-daughter relation in order to achieve a deeper understanding. Such a reading reveals among other things the key role of the inner dynamics of love. Love is not only the main theme of the work of Harpman, it’s also the meeting place of the two “love cures” of Harpman: literature and psychoanalysis, both situated in the field between narcissism and idealization, mechanisms that are inherent to what Freud called the subject’s eternal rebirth. The way in which writing functions as a way for the Harpman female protagonist to become a subject corresponds to Kristeva's idea of the entering into language, or into the symbolic system as Lacan put it, as a way to ward off the emptiness of the abjection. The symbolic system gives the subject a sense of being an individual with clear boundaries in a structured and intelligible world.
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Onurlu, Sema. "Symbol Space And Meaning In Hittite Architecture." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12604911/index.pdf.
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The importance of the Hittites derives from the fact that they were an organized central power extending over a large territory within which a number of societies maintained their language, culture and traditions. The archaeological findings of Hattusha, the Hittite capital reveal that the city had reached its maximum limits during the Great Kingdom period and the most magnificient and monumental buildings of the city are dated to this period. Yazilikaya, the open air sanctuary which reached to its final form during the Great Kingdom period too, is an outstanding example of the many temples constructed in Hattusha that belong to different periods and the dimensions of which are quite dfferent from each other. Among the archaeological findings of Hattusha, the royal archives are other important material evidence as they transmit us the Hittites'perception of the cosmos. However, understanding the antique world which is at a "
distance"
both historaiclly and conceptually is not an easy task. In this context, rethinking and reinterpreting the meaning attributed to Yazilikaya, th eopen air sanctuary, can only be achieved by considering the political, architectural and religious aspects together. This study is an attempt to reinterpret the material knowledge by drawing the appropriate limits of this knowledge with a contextual approach.
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Schulze, Bert-Wolfgang. "Operators with symbol hierarchies and iterated asymptotics." Universität Potsdam, 2001. http://opus.kobv.de/ubp/volltexte/2008/2594/.
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Contents:
Introduction
1 Edge calculus with parameters
1.1 Cone asymptotics and Green symbols
1.2 Mellin edge symbols
1.3 The edge symbol algebra
1.4 Operators on a manifold with edges
2 Corner symbols and iterated asymptotics
2.1 Holomorphic corner symbols
2.2 Meromorphic corner symbols and ellipicity
2.3 Weighted corner Sobolev spaces
2.4 Iterated asymptotics
3 The edge corner algebra with trace and potential conditions
3.1 Green corner operators
3.2 Smoothing Mellin corner operators
3.3 The edge corner algebra
3.4 Ellipicity and regularity with asymptotics
3.5 Examples and remarks
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Mercier, Hugues. "Communication over channels with symbol synchronization errors." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/904.
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Synchronization is a problem of fundamental importance for a wide range of practical communication systems including reading media, multi-user optical channels, synchronous digital communication systems, packet-switched communication networks, distributed computing systems, etc. In this thesis I study various aspects of communication over channels with symbol synchronization errors.
Symbol synchronization errors are harder to model than erasures or substitution errors caused by additive noise because they introduce uncertainties in timing. Consequently, the capacity of channels subjected to synchronization errors is a very challenging problem, even when considering the simplest channels for which only deletion errors occur. I improve on the best existing lower and upper bounds for the capacity of the deletion channel using convex and stochastic optimization techniques. I also show that simply finding closed-form expressions for the number of subsequences when deleting symbols from a string is computationally prohibitive.
Constructing efficient synchronization error-correcting codes is also a challenging task. The main result of the thesis is the design of a new family of codes able to correct several types of synchronization errors. The codes use trellis and modified versions of the Viterbi decoding algorithm, and therefore have very low encoding and decoding complexities. They also have high data rates and work for reasonably noisy channels, which makes them one of the first synchronization-correcting codes that have any chance of being used in practical systems.
In the last part of the thesis, I show that a synchronization approach can solve the opportunistic spectrum access problem in cognitive radio, where cognitive users want to communicate in presence of legacy users to whom the bandwidth has been licensed. I also consider the amount of communication required to solve a large class of distributed problems where synchronization errors can occur. More precisely, I study how allowing the parties to solve the problems incorrectly with small probability can reduce the total amount of communication or the number of messages that need to be exchanged.