Dissertations / Theses on the topic 'Visibilitet'
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Biswas, Debmalya Benveniste Albert. "Visibilité en systèmes hiérarchiques Visibility in hierarchical systems /." Rennes : [s.n.], 2009. ftp://ftp.irisa.fr/techreports/theses/2009/biswas.pdf.
Full textOlsson, Eriksson Linus. "Fornborgen och landskapet : En GIS-baserad visibilitetsanalys av relationen mellan bronsålderns fornborgar och dess landskapsrum." Thesis, Uppsala universitet, Arkeologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413347.
Full textDe, Lima Neto Avelino. "Le cinéma en tant qu'éducation du regard." Thesis, Montpellier 3, 2015. http://www.theses.fr/2015MON30036.
Full textThe knowledge is only possible due to we exist bodily. However, during the educational experience, the epistemic potency of the body is neglected, declining the registers of the intelligibility. The current thesis approaches that problem obliquely: from a body and image philosophy which has revealed other ways of doing those registers in the modernity – understood not as period itself, but as a qualification for the negotiations between the real and the intelligible. The referred ways are explored through Merleau-Ponty's and Michel Foucault's works, which offer a spectrum about that new negotiation of the real. In order to approach the studied problem, the visibility and the human body motricity in the cinema are taken as analysis object. The mentioned objects have been analyzed through a corpus of movies of which plots are centered at the formal education and they require from the characters and the spectators engagement into a visual performance. Aiming to approach the object, it is questioned how the Education phenomenon is represented by the cinema; how the body is exposed and how spectators can see it. Analyzing the corpus and articulating Merleau-Ponty's and Michel Foucault's theories, it has been possible to state the following thesis: the cinema as an education of the gaze. The general objective of this study is to reveal the educational potency of the filmic experience, which provides a new path of intelligibility for Education. In that sense, the body as a visual operator widens the capacity of understanding the real. The current work is divided in three chapters. The first one brings the methodological approach: it is pointed how the theoretical articulation is properly arranged; it explains the method of using the images as indirect language as part of the reality description; the filmic corpus is presented, as well the criteria for the films choices and for the construction of instrument adopted during the object analysis are described. In the second chapter, it is problematized the incapacity of the western society of formulating the real discursively by debating Merleau-Ponty's and Foucault's theoretical contributions about the visual performance displayed on the images while the films are watched and analyzed. In the third chapter, the implications of the education of the gaze provided by the cinema are developed, mainly concerning about the place attributed to the visibility during the formulation of the real. Finally, paths are designed for the construction of another approach for the visibility in Education. Assuming the gaze as an experience of knowledge, this study aims to present other ways of being, seeing, thinking and feeling the world. Therefore, it is a proposal to reset the epistemic and subjectification patterns at the educational context
Joulan, Karine. "Estimation de la visibilité routière du point de vue du conducteur : contribution aux aides à la conduite." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1014.
Full textThe driver assistance systems are systems that help the driver to better understand the plight driving task. Among the various sensors used by these ADAS, cameras are shipped and deliver images of the road scene which are processed and analyzed to inform the driver of potential hazards or switch of emergency systems. The cameras capture from these ADAS is far from representative of perception would have a driver. One of the possible consequences is that these ADAS can be counter productive in triggering warning and action against the driver. In order to completely fulfill the objectives of such ADAS, it is essential to have a map of the perception of the road environment from the perspective of the driver to adjust the help they might need. We propose to estimate by image processing, road visibility from the driver's perspective using a bio-inspired algorithm simulating the contrast sensitivity of the human eye. First, we extend a model of CSF (Contrast Sensitivity Function) to consider coherent detection rate with road safety, orientation, color and age of the driver. In a second step, we model our CSF spatial filtering and calculate the visibility for each pixel of the image. We apply this visibility map on a map of contours of our bio-inspired edge detector. Thus, we consider the contours of the road objects in the image rather than the characteristics in order to avoid assumptions. These contours are associated with a level of visibility as to whether or not they are visible by the observer. We validate the method by comparing it with the visual performance of observers in laboratory conditions for target detection and simulated driving situation in night driving. Secondly, we combine these two levels of visibility in easily understandable units for ADAS: a reaction time and a target distance. First, we propose a model to estimate the driver's reaction time depending on the visibility (inspired by Piéron's law of target detection) with experimental data on road synthetic images for some daylight fog density. Studies have shown that drivers would tend toget closer to the vehicle in front of them in order not to lose sight of them. This observation tells us that the driver does not have enough visibility in that configuration. We show the interest of the image restoration methods in terms of reaction time and gain in visual performance as well as vehicle detection rate. In a second step, we estimate a distance from the point of view of the driver taking inspiration from the detection of the rear lights of the vehicle in front of the driver. The results showed that drivers were bad about the distance evaluation of distant obstacles compared to driving aids based on optical imaging, radar or lidar for night driving. Based on this observation, the ADAS may play a fundamental role in preventing the driver from his inappropriate behavior. Finally, we outline the limits of our models CSF and visibility and offer several perspectives for road applications, one of which was the objective evaluation of lighting systems by our model of visibility and consistency with a subjective expertise
Bessadok, Firas. "Modèle pour l’évaluation et l’amélioration de la lisibilité d’une carte géographique." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1005/document.
Full textIn this thesis, we focus on the design and visualization of custom geographic maps by executing different stages of automatic evaluation and improvement of these maps.In the most recent mapping tools (such as Google Maps or GeoPortail) it is possible for the user to build himself a map that suits his needs using different layers of data which can come from several sources. However, the manipulation and edition of maps by non-experts can cause errors in the representation that affects the understanding of this map by its readers.That's why our research focus on improving the representation of maps created by non-expert users. Since the readability of a map depends on the visibility of objects that compose this map, in this work we propose a model which assesses the visibility of cartographic objects based on a system of five indicators of visibility (values between 0 and 1). This model then provides four methods for modifying the objects symbolization of this map, which will be used to improve their visibility. Between the evaluation and the improvement of the visibility of these objects, an analysis step is performed in order to decide whether an improvement in the symbolization is required, and if so, which of these four methods should be executed.This model takes as input a map in the form of (1) a set of layers each consisting of cartographic objects, (2) and the legend used to represent these cartographic objects. It will generate as an output (1) a set of XML files that contain the values calculated by the indicators of visibility, (2) a final map with a new representation that improve the value of these indicators of visibility. This process then provides readers with a more readable map.This work is then concluded by two tests that validate (1) our basic assumptions, (2) the actual correspondence between the indicator values and the real feel of the map readers, and finally trying (3) to determine visibility thresholds that can be used later in order to correct and refine the algorithms that are proposed in this thesis
Dey, Sanjoy. "Structural properties of visibility and weak visibility graphs." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1048394.
Full textDepartment of Mathematical Sciences
Hussein, Hasna. "Télévision et transformation des imaginaires et des rôles de genre dans les sociétés arabes : programmation et réception des chaînes satellitaires au liban, en egypte, en tunisie, au qatar et aux emirats arabes unis." Thesis, Bordeaux 2, 2013. http://www.theses.fr/2013BOR22070.
Full textThe new visibility of women on Satellite TV Channels is the product of transformations of the media landscape. The explosion of Arab Satellite Channels (ASC) since 1990 have allowed women in the Arab World to be present in a wide range of media professions, particularly TV anchor. Today, we can notice a diversity of women anchor’s figures after the emergence of many specialized and generalized satellite channels. Indeed, women are present in news, social and political talk shows, sport, religion, fashion, food, and reporting. Some of those figures outcome of political, social and economic logic of specific national context (Egypt, Tunisia and Saudi Arabia), while others are the result of professionalism competition of channels and subjective experience of women anchors-as new actors on ASC- in transnational context (Lebanon, Qatar and Dubai). A key factor in this new configuration of women’s visibility on Arab media landscape is the transgressing of the traditional male domain. Indeed, many women anchors proved impressive strides in debate TV programs and reporting. Based on their professional experience, high education and talents, they proved to be equal to men and sometimes more effective and influential. Women anchor’s new visibility in ASC affects women’s professional situation, shapes gender relationships, women’s participation in the public sphere, and family’s perceptions and retention of women into Arab Societies
Crassin, Cyril. "GigaVoxels : un pipeline de rendu basé Voxel pour l'exploration efficace de scènes larges et détaillées." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00650161.
Full textPerrin, Jean-Luc. "Evaluer la lecture électronique : une approche multidimensionnelle." Thesis, Paris 8, 2015. http://www.theses.fr/2015PA080024/document.
Full textThe aim of this thesis is to offer methods of evaluating performance during digital reading, in order to be able to compare different display devices. Tests were developed allowing repeated measurements for classic measures of digital reading: visibility (psychometric characterization), readability (letter identification, lexical decision, reading speed on automatically generated sentences) and comprehension (memorization and inference measurement while reading automatically generated texts). Beyond these classic dimensions, we also conducted two studies in order to examine the link between digital reading and the posture adopted by the device users. The first revealed that a tablet-use-related posture (lateral head tilt) does not affect reading performance. The second postural study demonstrated the effect of text difficulty on eye-screen distance during the use of an e-reader. Subjects approached the screen as their attentional level increased. The constructed tests and a postural measure were aggregated into a battery of tests permitting the evaluation of reading performance associated with a device. The resulting indicator is called the “Digital Reading Quotient”. This indicator has been computed for a computer screen, a projector and a tablet. The experimental results show that these tests can be used in order to compare different devices, especially in terms of visibility and readability
Hayek, Anne-sophie. "Quand la coopération flanche : l’effet des notes sur des indicateurs de la coopération." Thesis, Paris 10, 2014. http://www.theses.fr/2014PA100061/document.
Full textWidely used to assess achievement and performance in educational contexts, grades provide a clear indicator of success or failure, particularly in comparison to others. In this respect, we study their impact on specific work contexts requiring cooperation. Indeed, students are often exhorted to cooperate in groups and simultaneously are assessed with grades, which bring a focus on inter-individual comparison. However, to the best of our knowledge, no work has investigated the effects of grades on cooperation, yet a central question given educational trends encouraging cooperative practices, which we propose to explore in the experimental chapters of this thesis. Chapter 4 tests the effect of grades with regards to their capacity to jointly highlight individual visibility and social comparison. It tries to disentangle which of these facets could affect a motivated bias likely to reduce cooperation, namely individuals’ preference for information confirming their own choice. Results show that a graded-cooperative situation increased this preference effect in comparison to other conditions where only individual visibility was manipulated, and moreover increased individuals’ perception of a competitive atmosphere. Chapter 5 tests the effect of grades on direct cooperative interactions, namely on group information sharing. Results show that grades hindered information exchange between individuals, leading them to withhold crucial task-information. Finally, Chapter 6 tests the effects of grades on another indicator of group cooperation, namely inter-individual coordination. Results indicate that showcasing grades at the onset of a cooperative task necessitating inter-individual coordination decreased group performance and elicited more negative dominant behaviours amongst participants. Together these results provide evidence that grades hamper group cooperation. We conclude by discussing implications for the practice of grading in Education
Pidun, Tim. "Visibility of Performance." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-166848.
Full textThe supply with adequate information is one of the main functions of Performance Measurement Systems (PMS), but also still one of its drawbacks and reason for their failure. Not only the collection of indicators is crucial, but also the stakeholders’ understanding of the about their meaning, purpose and contextual embedding. Today, companies are faced to seek for a PMS without a way to express the goodness of a solution, indicating its ability to deliver appropriate information and to address these demands. The goal of this investigation is to explore the mechanisms that drive information and knowledge supply in PMS in order to model a way to express this goodness. Using a grounded Theory approach, a theory of visibility of performance is developed, featuring a catalog of determinants for the goodness of PMS. Companies can conveniently use them to assess their PMS and to improve the visibility of their performance
Brittain, Eric A. (Eric Audwoyne) 1972. "Distributed visibility servers." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8948.
Full textIncludes bibliographical references (leaves 54-55).
This thesis describes techniques for computing conservative visibility exploiting viewpoint prediction, spatial coherence and remote visibility servers to increase the rendering performance of a walk through client. Identifying visible (or partially visible) geometry from an instantaneous viewpoint of a 3-D computer graphics model in real-time is an important problem in interactive computer graphics. Since rendering is an expensive process (due to transformations, lighting and scan-conversion), successfully identifying the exact set of visible geometry before rendering increases the frame-rate of real-time applications. However, computing this exact set is computationally intensive and prohibitive in real-time for large models. For many densely occluded environments that contain a small number of large occluding objects (such as buildings, billboards and houses), efficient conservative visibility algorithms have been developed to identify a set of occluded objects in real-time. These algorithms are conservative since they do not identify the exact set of occluded geometry. While visibility algorithms that identify occluded geometry are useful in increasing the frame-rate of interactive applications, previous techniques have not attempted to utilize a set of workstations connected via a local area network as an external compute resource. We demonstrated a configuration with one local viewer and two remote servers.
by Eric A. Brittain.
S.M.
Kodra, Austin S. "VISIBILITY AT ZERO." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1352.
Full textstark, frankie. "Claude Cahun: La Visibilite Comme Resistance." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/scripps_theses/1362.
Full textMorlon, Romain. "Stratification thermique et optique d'un environnement enfumé et interactions eau/fumée sous aspersion." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0138/document.
Full textThis work was devoted to the study of water/smoke interactions in the case of water mist activation on a smoke layer. The aim was to investigate the effects observed on thermal and optical properties when injecting water particles using sprinkler or water mist devices through a smoke layer generated with an heptane pool fire. A first review was reported in order to highlight the researches devoted to water aspersion for firefighting and the smoke stratification phenomena. An experimental study based on 50 runs at real scale was presented, involving optical and thermal measurements. In particular, a laser opacimeter system was developed, which allowed measuring the smoke opacity and the effects of smoke/water interactions on opacity and visibility. Afterwards, a numerical study was conducted. On the one hand fire tests were simulated using the FDS 6th version (Fire Dynamics Simulator) and on the other hand a dedicated code allowed us to evaluate the visibility. The values of the soot and droplet concentrations were extracted from FDS and used into the code dedicated to visibility to calculate the optical properties of the corresponding absorbing-scattering environment. Those properties are then used in a Monte Carlo approach combined with PSF (Point Spread Function) and MTF (Modulation Transfer Function) methods to evaluate the intensity and the contrast of reconstructed images. The destratification effects based on thermal and optical criteria were compared experimentally and numerically for each technology
Rådmark, Magnus. "High visibility six-photonentanglement." Licentiate thesis, Stockholms universitet, Fysikum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-33053.
Full textShermer, Thomas C. "Visibility properties of polygons." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74241.
Full textLink-visibility is an extended notion of visibility arising from robotics and motion planning problems. Hidden sets are sets of points in a polygon such that no two points of the set are visible, and guard sets are sets such that each point of the polygon is visible to some point in the guard set. Both maximum hidden set sizes and minimum guard set sizes can be used as polygon shape complexity measures.
Johnson, Stewart Martin. "Computer aided visibility studies." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328424.
Full textOllila, T. (Timo). "WWW visibility in marketing." Master's thesis, University of Oulu, 2012. http://jultika.oulu.fi/Record/nbnfioulu-201302121033.
Full textHulme, O. J. "Visibility, invisibility and reportability." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1445591/.
Full textBiswas, Debmalya. "Visibilité en systèmes hiérarchiques." Rennes 1, 2009. ftp://ftp.irisa.fr/techreports/theses/2009/biswas.pdf.
Full textHierarchical systems provide an elegant mechanism to analyze system functionality at different levels of abstraction. They are usually constructed in a top-down or bottom-up fashion level by level. As a result, by construction, visibility of entities in a hierarchical system is restricted to adjacent (parent-child) levels. Such restricted visibility is often not sufficient for real-life scenarios. On the other hand, allowing arbitrary interaction among the hierarchical entities, without any restrictions, is not an acceptable solution either due to security concerns. In this thesis, we address two sub-problems of the visibility issue in hierarchical systems. First, we consider the problem of defining a visibility model, given the visibility requirements and restrictions of the different entities in a hierarchy. We present graph based visibility models for two specific hierarchical systems: P2P Communities and Web services compositions. Second, we deal with the orthogonal problem of determining the visibility requirements of the given hierarchy such that a specific property holds. We give both absolute and approximate algorithms to determine the minimal visibility required by a hierarchical Web services composition to provide the property of transactional atomicity
Chopin, David. "Grammaire du discours managérial à partir d’une analyse sémantique de la littérature de gestion (1910 - 2010)." Thesis, Paris, CNAM, 2017. http://www.theses.fr/2017CNAM1127/document.
Full textThe "managerial discourse" is today omnipresent in the life of corporation, as well as within organizations and in everyday life of individuals. The aim of this PhD is to describe the conditions of emergence of a new kind of rationality, as well as its ways of transformation. Firstly, the "managerial discourse" stems from the management sciences, which irrupted at the beginning of the 20th century, composed by part of military principles, as well as notions of engineering, biology and social sciences. What we called "visibilities" (term coined by the work of the historian Alfred D. Chandler) enable a "managerial discourse" to streamline normatively the enterprise, its techniques and its human actions related. In that way, rationality had been analyzed as an "ideology" by Reinhard Bendix, but furtherly viewed as a plurality of discourses that are continuously evolving. Prolonging the work of Luc Boltanski and Eve Chiapello, we are describing how the body of doctrine concerning "managerial discourse" has been transformed from the 1960’ to the 1990’; we have extended this analysis with a new corpus of managerial literature of the 2010’. Our semantic analysis – over 100 years of specialized literature (from pionniers to actual vision) – highlights the displacements of meaning over time while restoring its unity with the support of a what we call "grammar of the managerial discourse". Basically, the company had General Motors for model in the 1960’, then in the 1990’ it was Toyota, and Google nowadays. Similarly, concepts are reshuffled : the focus on "planning" moved into "networks" and then "collaborations"; The "delegation" moved into "leadership" and then "liberation"; focus were on "programs", after on "projects" and now on "data". However, our PhD shows how "managerial discourse" remains structured around the notion of "grammar". This consists of a "synoptic visibility" (ie the overall representation of the company), a "visibility of the measure" (ie the calculation of the work activity), a "visibility of the delegation" (ie control of the activity of others), and a "visibility of the commercialization" (ie the definition of the company from outside). The "managerial discourse" is powered firstly by its adaptability to any change, with the help of its "grammar" defined in this thesis
Gerhards, Julien. "Partition de volumes d'ombres : une alternative pour le rendu d’ombres en temps réel." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0083/document.
Full textThis thesis focuses on exact per pixel hard shadow computation. We propose a new method for rendering hard shadows using a partition of shadow volumes : first, a ternary tree based on the shadow planes of the shadow volumes, and then, it is traversed to determine the shading of each pixel in the image. An interesting property of this structure is the predictability of its memory footprint ; Unlike other geometric shadow methods, our approach supports complex scenes up to a million triangles thanks to the logarithmic behavior of the structure traversal with respect to the geometric complexity
Fornacciari, Ilaria. "Foucault et les images : pratiques de l'image et visibilité entre analyse archéologique et irréductibilité critique." Thesis, Paris 8, 2017. http://www.theses.fr/2017PA080088/document.
Full textIn the framework of the present ongoing debates about the role and power of images, our work aims to explore the extent and the discontinuous characterizing the historical relations between visibilities and practices of images in the light of the research of the philosopher Michel Foucault. The first part analyzes the role of descriptions and pictorial evocations in Foucault's works which can be associated with archaeological analysis; its objective is to show the singular relation between images and the historical emergence of different “modalities of seeing” in their articulations with discursive practices. Thanks to the analysis of texts and unedited manuscripts on painting, the second part points out the discrepancies between the visual dimension of Foucauldian research and the methodological elaboration of the archaeological discourse, with its claim to disclose a field of coherence for the discursive analysis. In light of the debates between art history's methodology and philosophy in France at the time, our analysis presents this apparently marginal section of the research of Foucault as an attempt to consider the cultural dispositions of visibility and the historical configurations of visual presentation as differently articulated through historical modalities. The third part analyzes various Foucauldian experiments concerning image practices. Through the study of archival material, the political stakes of the Foucauldian reflection about pictorial modernity through the emergence of the notion of critique as attitude are presented
Eikel, Benjamin [Verfasser]. "Spherical visibility sampling : preprocessed visibility for occlusion culling in complex 3D scenes / Benjamin Eikel." Paderborn : Universitätsbibliothek, 2014. http://d-nb.info/1046385879/34.
Full textMell, Laurent. "Les usages des réseaux socionumériques : la mise en visibilité de soi sur Facebook." Thesis, Paris 8, 2014. http://www.theses.fr/2014PA080043.
Full textThe increase of the use of social network sites has consequences regarding individual privacy. The Internet’s capability to disseminate information and various communication services available is also a mechanism that reveals the privacy of the user in digital public spaces.Our doctoral research project proposes to study the practices and whole of the factors associated with the phenomenon of self-exposure on social network sites, especially on Facebook.This research contains a quantitative analysis, based on an online questionnaire to 444 Facebook users, as well as a qualitative analysis from 27 interviews conducted with users of this social network site.It aims to analyze the reasons that explain the development of regulatory practices of digital visibility caused by a social network site that incites increased self-exposure.It appears that users are able to develop spaces of visibility of their personal information and that they modulate their practices in order to manage the complexity of the digital identity. Then, changes in individuals’ visibility on Facebook do not occur a linear fashion but in phases, defined as interventions in the management practices of privacy. These changes correspond to instances of life that are concurrent to the experience of use. Finally, the socio-technical system, or rather the invitations to self-exposure so that it emits, as the normative expectations of the "society" are equally ways of defining the identity of the user of social network sites. Factors invitation to self-exposure - that is the user himself; its network of relationships; the socio-technical device Facebook; and "society" under the related normative expectations it imposes - correspond largely to preventive mechanisms guarding against potential threats to privacy
Astier, Marie. "Présence et représentation du handicap mental sur la scène contemporaine française." Thesis, Toulouse 2, 2018. http://www.theses.fr/2018TOU20015/document.
Full textDisability is nowadays increasingly present in the art world. This phenomenon is usually analyzed in the context of art therapy, in which theater is used as a way to improve the patient’s health. This dissertation adopts a very different perspective: inspired by disability studies, in which disability is considered a social and cultural phenomenon, it focuses on the visibility of mental disability through an aesthetic and political lens. The first part is an historical contextualization of abnormality in general. It studies how the freaks and the pathological cases gained visibility between the 16th and the 20th century, in Europe and in the United States. It stresses that what is nowadays called Ôdisability’ was always represented rather than merely exhibited. The second part focuses on contemporary theater and examines how mental disability can be heard, through the analysis of three performances created in the 2010’s : The Curious Incident of the Dog in the Night-Time directed by par P. Adrien, I am the Emperor directed by V. Poirier et Meet me at East Train Station directed by par G. Vincent. Played by able actors and actresses, these performances take disability as a theme and show it as a sharing of experience. Disability is portrayed as a deviation from social norms, which it enables to question. The third part is devoted to performances entirely played by actors and actresses with mental disabilities, in which disability becomes an aesthetic resource regarding dramaturgy, playing and staging. Creations by La Compagnie de l’Oiseau-Mouche, Atelier Catalyse and the Theater HORA, as well as the discourse about these companies, are analyzed and compared to each other
Jackson, LillAnne Elaine, and University of Lethbridge Faculty of Arts and Science. "Polygon reconstruction from visibility information." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 1996, 1996. http://hdl.handle.net/10133/41.
Full textvii, 78 leaves ; 28 cm.
Nirenstein, Shaun. "Fast and Accurate Visibility Preprocessing." Thesis, University of Cape Town, 2003. http://pubs.cs.uct.ac.za/archive/00000101/.
Full textFiege, Ludger. "Visibility in event based systems." Phd thesis, [S.l. : s.n.], 2005. http://elib.tu-darmstadt.de/diss/000574.
Full textTechakittiroj, Kittiphan. "Visibility graphs and motion planning." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/935947.
Full textDepartment of Computer Science
Purdy, Shelby R. "Spaces of Visibility and Identity." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/honors/346.
Full textPrimavera, Daniele, and Hang Shi. "Perfecting visibility with retailer data." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92655.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 66-67).
This thesis investigates the utility of using retailer point of sales (POS) data in the production planning process of a consumer-packaged goods (CPG) manufacturing company. The quantitative measurements of utility include the improvement of production forecasting, reduction of inventory costs, and reduction of equipment changeover costs. Qualitatively, we evaluate the effectiveness of using POS to drive a more collaborative relationship between the retailer and the manufacturer. The POS data include items sold, store inventory, and warehouse inventory of a retail partner for specific stock keeping units (SKUs) produced by the manufacturer. We develop production-planning models by combining POS data with customer orders, current production plans, and existing inventory positions to optimize manufacturing and inventory costs. The results illustrate that if the aggregate volume of customer orders approximately equaled to that of the POS, then the integration of POS data into manufacturing planning offers opportunities to reduce production and inventory costs. The analysis also points to situations where POS data and customer orders vary significantly; in these situations the proposed production-planning model does not apply, but the POS data provide useful evidence for aligning plans between the manufacturer and the retailer.
by Daniele Primavera and Hang Shi.
M. Eng. in Logistics
Angelier, Pierre. "Algorithmique des graphes de visibilité." Paris 7, 2002. http://www.theses.fr/2002PA077007.
Full textAlley, William M., Lisa Beutler, Michael E. Campana, Sharon B. Megdal, and John C. Tracy. "Groundwater Visibility: The Missing Link." WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/622774.
Full textBoland, Ralph Patrick. "Polygon visibility decompositions with applications." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6244.
Full textMcNamee, Stuart, Larry Rheaume, and Richard Lutomirski. "REMOTE ATMOSPHERIC VISIBILITY MONITORING RAVM." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/608288.
Full textTest ranges need advanced knowledge of visibility conditions to increase the robustness of the test data collection and evaluation process. For any given test, the ability to capture high-resolution performance data of aircraft using ground-based film theodolites and electro-optical imaging sensors is subject to uncertainties in imaging capability permitted by the intervening atmosphere. The Remote Atmospheric Visibility Monitoring (RAVM) project is being developed as a suite of three collocated optical sensors that measure the components of atmosphere-induced image degradation. When the component measurements are combined, a ‘transfer function’ is obtained that can project the quality of imaging data without an aircraft being present. The resulting predicted imagery provides valuable pre mission information that can be analyzed and reviewed before incurring expensive fieldtest operations. The RAVM project is a Phase II Small Business Innovation Research (SBIR) program that is developing an instrument for providing an atmospheric visibility measurement capability to support range scheduling and test operations. This advanced capability will monitor ‘effective visibility’ in the context of imaging extended targets, such as aircraft, and predicting the degrading effects of the atmosphere on imaging sensors operating in the visible and near-infrared regions of the electromagnetic spectrum.
Körlinge, Max. "Eskilstunakistornas bruk och återbruk : Tidigkristna gravmonument i Östergötland under medeltiden." Thesis, Stockholms universitet, Arkeologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-86271.
Full textHautiere, Nicolas. "Détection des conditions de visibilité et estimation de la distance de visibilité par vision embarquée." Phd thesis, Université Jean Monnet - Saint-Etienne, 2005. http://tel.archives-ouvertes.fr/tel-00068743.
Full textMorin, Michael. "Multi-Criteria Path Planning with Terrain Visibility Constraints: The Optimal Searcher Path Problem with Visibility." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27495/27495.pdf.
Full textHautière, Nicolas. "Détection des conditions de visibilité et estimation de la distance de visibilité par vision embarquée." Saint-Etienne, 2005. http://www.theses.fr/2005STET4006.
Full textThe adverse weather conditions, in particular the fog, pose a problem for the drivers, who tend to overestimate distances, but also to the exteroceptive sensors which work less well. The detection and the quantification of the visibility conditions thus constitute a strong stake in terms of road safety. We propose two complementary methods onboard a vehicle aiming to estimate the visibility distance by using real time image analyses techniques. Both are based on the definition of the meteorological visibility distance, which is the greatest distance at which a black object of suitable dimensions can be recognized by day against the horizon sky. The first technique, using a model of atmospheric diffusion, detects and estimates the density of daytime fog by using a single camera. The second technique, using a generic property of the atmosphere, is able to estimate day and night the visibility distance under all meteorological conditions by using a stereoscopic sensor. On one hand, we evaluate our methods, thanks to several video sequences grabbed under different meteorological conditions, what constitutes a qualitative evaluation of the work done. On the other hand, we evaluate the methods, thanks to actual images of a specific site equipped with reference targets, which has been conceived and realized on the test facilities of Satory, what constitutes a quantitative evaluation
Perrot, Romuald. "Lobes de cosinus et visibilité pour la simulation d'éclairage." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2304/document.
Full textSimulating light transfer within a virtual environment requires to solve a first order, infinite recursive integral, that unfortunately doesn't have any solution in general cases. Though theoretically exact solutions exist, their computing time is not adapted to real-time rendering in a near future. Many methods have been proposed for accelerating these computations, but they rely on approximations that often produce visible artifacts on the resulting images. Our goal is to propose some new solutions that can reduce biases with two complementary approaches : (i) a new homogeneous representation of each term of the equation can be used to resolve it using only simple operators ; (ii) considering precise visibility information in order to reduce bias of methods that rely on density estimation. On the long range, we aim at reducing visibility requests costs of each contribution. For that purpose, we particularly plan to introduce hierarchical visibility computations so as to amortize queries cost
Acharian, Georges. "Modélisation de la détection de défauts et perception de la qualité d'images radiologiques." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT065.
Full textSince the beginning of the 20th century, medical imaging has significantly been improved and represents now an essential mean for medical diagnosis. In the field of radiology, new digital detectors are gradually replacing the old film techniques allowing a better image. This thesis, prepared in collaboration between the company Trixell, manufacturer of X-ray detectors, and the laboratory Gipsa-Lab, is part of the framework of quality control of these detectors by image analysis. Biomedical applications involved by these devices are particularly sensitive, and the principle of “zero artifact” is required to ensure the quality of the product. Despite the various processings, some artifacts may be present in the images.This thesis focuses on the development of models that quantify the visibility of artifacts in concordance to human observation. Two complementary approaches are developed : the first one is based on psychophysical experiments and the second one is a modeling approach based on decision theory. In comparison to existent models, our model takes into account perception characteristics including saccades and eye fixation in image analysis : the visibility test is thus the product of local visibility tests calculated on the salient points of the image and assumed to be independent. The results show the interest of our approach, especially for static detectors. Based on the results and a final eye-tracking experiment, this thesis suggests perspectives taking into account other characteristics such as the number of eye fixations and their duration
Cevikbas, Safak Burak. "Visibility Based Prefetching With Simulated Annealing." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609324/index.pdf.
Full textSaeedi, Bidokhti Noushin. "On fully characterizing terrain visibility graphs." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/41902.
Full textGilbers, Alexander [Verfasser]. "Visibility Domains and Complexity / Alexander Gilbers." Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/1047622769/34.
Full textFort, Marta. "Visibility and proximity on triangulated surfaces." Doctoral thesis, Universitat de Girona, 2008. http://hdl.handle.net/10803/7890.
Full textpunts, segments, poligonals i polígons. Les estrategies que proposem utilitzen algoritmes
de geometria computacional i hardware gràfic. Comencem tractant els problemes de visibilitat sobre models de terrenys triangulats considerant un conjunt d'elements de visió generalitzats. Es presenten dos mètodes per obtenir, de forma aproximada, mapes de multi-visibilitat. Un mapa de multi-visibilitat és la subdivisió del domini del terreny que codifica la visibilitat d'acord amb diferents criteris. El primer mètode, de difícil implementació, utilitza informació de visibilitat exacte per reconstruir de forma aproximada el mapa de multi-visibilitat. El segon, que va acompanyat de resultats d'implementació, obté informació de visibilitat aproximada per
calcular i visualitzar mapes de multi-visibilitat discrets mitjançant hardware gràfic. Com
a aplicacions es resolen problemes de multi-visibilitat entre regions i es responen preguntes
sobre la multi-visibilitat d'un punt o d'una regió. A continuació tractem els problemes de proximitat sobre superfícies polièdriques triangulades considerant seus generalitzades. Es presenten dos mètodes, amb resultats d'implementació, per calcular distàncies des de seus generalitzades sobre superfícies polièdriques on hi poden haver obstacles generalitzats. El primer mètode calcula, de forma exacte, les distàncies definides pels camins més curts des de les seus als punts del poliedre. El segon mètode calcula, de forma aproximada, distàncies considerant els camins més curts sobre superfícies polièdriques amb pesos. Com a aplicacions, es calculen diagrames de Voronoi d'ordre k, i es resolen, de forma aproximada, alguns problemes de localització de serveis. També es proporciona un estudi teòric sobre la complexitat dels diagrames de Voronoi d'ordre k d'un conjunt de seus generalitzades en un poliedre sense pesos.
In this thesis, we solve visibility and proximity problems on triangulated surfaces concerning generalized elements. As generalized elements, we consider: points, segments, polygonal chains and polygonal regions. The proposed strategies use algorithms of Computational Geometry and Graphics Hardware. We start by studying multi-visibility problems on triangulated terrain models concerning a set of generalized view elements. We present two methods to obtain approximate multi-visibility maps. A multi-visibility map is a subdivision of the terrain domain encoding visibility according to different criteria. The first method, of complex implementation, uses exactly computed visibility information to approximately reconstruct the unknown multi-visibility map. The second, from which implementation results are provided, uses approximate visibility information to compute and visualize discrete multi-visibility maps by exploiting graphics hardware capabilities. As applications, we compute multi-visibility maps, solve inter-region multi-visibility problems and approximately answer point and polygonal region multi-visibility queries. Next, we tackle proximity problems on triangulated polyhedral surfaces, where generalized obstacles are allowed, considering generalized sources. We present two methods, with implementation results, to compute distances on polyhedral surfaces from a generalized source. The first method computes exact shortest path distances from generalized sources. The second provides approximate weighted shortest path distances from generalized sites on weighted polyhedral surfaces. Both methods are posteriorly extended to handle the multiple-site problem where the corresponding distance field is obtained. As applications, we compute discrete order-k Voronoi diagrams and approximately solve some facility location problems. We also provide a theoretical study on the order-k Voronoi diagram complexity of a set of generalized sources for the non-weighted case.
Madern, Leandro Narcís. "Good-visibility computation using graphics hardware." Doctoral thesis, Universitat de Girona, 2010. http://hdl.handle.net/10803/7892.
Full textIn this thesis we design, implement and discuss algorithms that run in the graphics hardware for solving visibility and good-visibility problems. In particular, we compute a discretization of the multi-visibility and good-visibility maps from a set of view objects (points or segments) and a set of obstacles. This computation is carried out for two-dimensional and three-dimensional spaces and even over terrains, which in computational geometry are defined as a 2.5D space.
Sanches, Pedro. "Health Data : Representation and (In)visibility." Doctoral thesis, KTH, Programvaruteknik och Datorsystem, SCS, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158909.
Full textFör att förstå hälsodata krävs sammanhang. Jag visar hur detta kan erhållas, genom två fallstudier: en om självövervakning, med fokus på representation av kroppsdata, samt en om massövervakning, med fokus på representation av populationer. Jag granskar kritiskt hur informationsteknologi (IT) kan fås att representera såväl individer som populationer och vilka följder det får. Mina bidrag är: (i) utformningen av ett självövervakningssystem för stresshantering, (ii) utformningen av ett massövervakningssystem baserat på data från mobiltelefonanvändning, (iii) en empirisk studie av hur användare av en hälsosensor begriper det data som sensorn genererar, (iv) en diskursiv analys av hur syndromövervakningssystem utformas, (v) en kritisk analys av processer kring att utforma ett massövervakningssystem, samt (vi) en analys av den historiska korrektheten i begrepp och beslutsfattande i samband med utformningen av ett stresshanteringssystem. Jag visar att produktion av hälsodata, liksom tekniska beskrivningar av de algoritmer som används i den processen, beror av faktorer som hänger samman med IT-utformningsprocessen. Dessa faktorer avgör sedan hur data kan fås att representera individer och populationer på sätt som kan rendera delar av en population, hälsodeterminanter, eller individens självuppfattning och förståelse av välmående osynliga. Jag visar också att arbetet med att producera data inte är avslutat i och med det ingenjörsarbete som krävs för att IT-systemen ska byggas: konstant underhåll krävs också.
QC 20150114
Davies, J. I. "Visibility and the selection of galaxies." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254490.
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