Dissertations / Theses: 'Localization of the production'

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Lakshmikanthan, Jayaprakash, and Godfred Tabiri. "FACTORS AFFECTING PRODUCTION LOCALIZATION IN CONSIDERATION WITH THE SUPPLY BASE AND SOURCING PARAMETERS." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-14766.

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Over the past years manufacturing firms have moved their production to low cost regions. Many factors lead to the moving of their production and how these factors influence their decision making process. These have been discussed in various literatures. They also source from low cost regions in order to improve their productivity. Not only do they source from low-cost regions but also to actually produce goods in those countries. Many literatures have talked about the impact on some of the factors but little on the impact of supply base and sourcing parameters. The thesis seek to review the factors that affect production localization decision process and also find out how the supply base and sourcing parameters affects decision making process, whether the supply base and sourcing is really considered and the impact it has in decision making process to localize a new production. Literature review and interviews were used in this process. Four companies namely Haldex AB, ABB, case company A and B were used for the research. The main factors that are been considered for production localization were found out from the companies and practically the impact of the supply base and sourcing parameters during decision making are presented. The results from the research questions and the empirical studies is summarized in a framework that will enable readers to know the main factors that affect production localization, how decision making is done and the main impact of the supply base and sourcing in production localization. In addition some benefits of placing emphasis on the supply base and sourcing parameters.

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Courtney, Ya'el Carmel. "The Production and Localization of Luteinizing Hormone in the Brain." Kent State University Honors College / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1556024626120314.

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Moreno, de Palma Isabel. "Metabolic channeling for biofuel production : Co-localization of Pdc and Adh." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-319519.

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Enhancing productivity in bioprocesses, especially for biofuel production, is crucial for achieving an environmentally and economically sustainable biotechnology industry.Metabolic channelling occurs in nature when the intermediate between two consecutive enzymes in a pathway is directed from the first enzyme to the second avoiding diffusion in the cytosol. This would be very advantageous in bioprocesses as it would increase efficiency of a particular pathway, reducing side products and protecting the cells from potential toxic intermediates. In recent years different strategies for emulating channelling effect wereproposed and used with very promising results. Clustering of enzymes seems to be the simplest way to create metabolic channelling. In this master thesis, four different strategies to co-localize enzymes in clusters are compared. The metabolic pathway chosen as a model was ethanol production by pyruvate decarboxylase (Pdc) and alcohol dehydrogenase (Adh). Chimeric proteins were genetically engineered and transformed in E. coli creating different strains. Ethanol production by the different strains was measured to compare production efficiency. Cell growth and protein expression were used for further understanding of the results. Strengths and weaknesses of each strategy and proposals for further improvement were discussed.

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Nauclèr, Lizette, Therese Arvidsson, and Mikael Klasson. "The flight of firms : the decision process behind localization abroad." Thesis, Jönköping University, JIBS, Business Administration, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-75.

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Background and problem:The industry of today is changing and many firms chose to internationalize due to the increased price competition. It is often cheaper to produce in a low cost country and sometimes it can be strategic to produce there in order to gain market shares.Purpose:The purpose of this thesis is to study the decision proc-ess when manufacturing firms choose to locate production abroad.Theoretical framework:Decisions have different grade of rationality and complexity. To make a decision to establish abroad is a complicated decision, which often involves many people, requires time and information in order to avoid uncertainty. The people involved in the process need to be able to both gather and use the information in order to do as good decision as possible. Many factors affect the decision concerning foreign establishment, the most occurring are low costs, better market structure and the growth potential in the area of interest.Empirical findings:ABA Group, Balton AB, ITAB Shop Concept and Stilexo Industry AB are the four firms in which the decision process is investigated. They have all experienced increasing competition in the more globalized market, which has forced them to establish abroad in order to survive.Analysis and final discussion:For all firms investigated, the decision to establish abroad was influenced by availability of information and time, the people involved and their ability to use the information. All these factors are affected by uncertainties, from which the firms not completely can protect themselves. To do as good decision as possible the firms need to be careful and consider all factors that influence the outcome.

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Zeng, Wenna. "Localization as power negotiation: the production of an imported television format in China." HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/409.

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Traditionally, there have been two contradictory views on the nature of power in the body politic: that of the centralized and top-down power structure within the state apparatus and that of dispersive power, based on knowledge, exemplified by the work of Max Weber and Michel Foucault respectively. This PhD thesis will demonstrate that a better path to the understanding of power, at least in relation to the localization of television formats in China, is that explained by the theory of negotiated power. Based on these theoretical foundations on the nature of power and continuing discussions on globalization and production studies, this thesis introduces a new approach to understand power via dynamic value exchanges among resources, capital and interest. The findings are positioned in relation to the literature on power theories, globalization, television format research and Chinese media studies. Based on six months' of ethnographic study on Hurry Up, Brother, which is a Korean format show localized by a Chinese network, this research examines the power relations in the decision-making process concerned with the format localization among several different parties - internal and external - involved in the operation, namely Chinese Zhejiang Satellite TV and its production team, Korean Seoul Broadcasting System and its travelling producers, the Chinese government, sponsors, celebrities, Chinese independent companies and their editors, and audiences. It integrates the theories of negotiated order, cultural proximity and the mechanism of production into its theoretical framework to demonstrate how negotiated power is exercised in a project network via exchanges of resources, capital and interests among different parties. This theoretical framework helps to challenge the hierarchical power approach by the Chinese media; and to provide detailed empirical evidence to show how political, economic, cultural and social factors impinge upon decision-making. In conclusion, it is noted that initially power is neither centralized nor dispersive in China, but rather, power is negotiated; later it suggests an innovative approach that power is the result of competition of capital based on changes of primary interests among different parties, indicating that localization is part of the process of power negotiations. This doctoral thesis provides first-hand and detailed data as well as a dynamic picture of how power is exercised in the contemporary Chinese television industry where entertainment production increasingly breaks free of governmental centralized control by replacing it with power negotiations. This approach overcomes the geographic dichotomy between global and local, and expands the boundaries of cultural, economic, political, professional and social fields. This thesis is an experimental study which the author can motivate a new direction in the discussion on power theories as well as help in the understanding of the globalization of cultural products and of Chinese television in general.

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McMonagle, Susannah Kimberly. "Advertising Producers' Localization of Global Brands: Glocalization, Storytelling, and Audience Construction." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/414827.

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Media & Communication Ph.D. The purpose of this dissertation is to 1) critically explore how contemporary advertisers are operating within a glocal framework to diffuse product information and branding to diverse, distant consumers; and 2) to assess the implications of these processes for consumer-audiences. This project explores what approaches global advertising producers utilize to distribute product information and branding to local audiences, how these processes then impact and shape the creation and diffusion advertising campaigns, and lastly, how do those processes impact the way advertisers imagine and target their audiences. The findings of this study shed light on how advertising producers imagine their work, their role within that work, and the audiences who consume their products. This project uncovers how the processes of global information diffusion impact partnerships between “headquarters” and local offices, the way in which messages are adapted and localized for various audiences, how these messages are extolled around the world, and conversely, what messages, stories, or cultural values might be minimized or lost as a result of this current environment. This project draws upon in-depth interviews with advertising professionals and other global stakeholders, as well as on industry trade reports, press articles, and academic research. Interviews were conducted with global stakeholders at Airbnb, Campbell Soup, and Under Armour. In addition to conducting in-depth interviews as a methodological approach, this dissertation engages with a case study logic as a way of understanding the context within which global advertisers localize global brands. Furthermore, employing a multiple-case study approach allowed me to compare and contrast processes and implications between and amongst this trio of brands and various global producers, balancing the intricacies of a single organization with larger themes and trends in industrial production. Themes related to the glocal framework emerged that spoke to the complex processes that global producers must navigate in order to do work on a global scale. These themes, the Global Mindset, which considers how producers conceptualize their role and their work; the Global Story, which explores how producers tell global stories to their consumers (and to themselves); and the Global Consumer, which illuminates the undercarriage of the delicate relationship between producers and consumers; have significant implications because understanding global production processes helps to explain under what context campaigns were conceptualized, how decisions were made, and why certain campaigns are more culturally relevant to local audiences. Beyond this, these findings shed light on the nuances of global brand diffusion pointing to larger trends in glocal advertising, and more broadly, the future of advertising on a global scale. Temple University--Theses

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Rabe, Johannes [Verfasser]. "Lane-Precise Localization with Production Vehicle Sensors and Application to Augmented Reality Navigation / Johannes Rabe." Karlsruhe : KIT Scientific Publishing, 2019. http://www.ksp.kit.edu.

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Stenmark, Johan. "Evaluation of Skåne County’s capacity to be self-sufficient in foodstuffproduction: now and for the years 2030 and 2050." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-254919.

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Sweden is becoming increasingly dependent on the import of foodstuffs from a globalfood system that is unsustainable due to its responsibility for environmental degradation and itsdependency on finite resources like fertilizers and fossil fuels. The diminishing ability to be selfsufficientin a time when peak oil, climate change, environmental degradation, exponentialpopulation growth, and a troublesome global economy might reshape the structures of the currentsystems, in a not so distant future, could be a cause for great worry. Skåne County has functioned asa case study to investigate the level of self-sufficiency in foodstuffs at the present time and theprospects for self-sufficiency in the future. Forecasts for the years 2030 and 2050 have been madebased on five different variables: population size, production and consumption, climate change,available agricultural land, and the transition toward a sustainable agricultural system. At thepresent time, with today’s consumption patterns, the foodstuffs that are produced in Skåne Countycan sustain around 78% of the population. For the forecasts, different scenarios have been generatedby adjusting the five variables within a reasonable range. Scenarios are also in the forecasts inwhich suggested proactive implementations to enhance the possibilities for self-sufficiency havebeen included. Due to these proactive implementations and the high degree of uncertainty withinsome variables, the result ranges from a 16.7% self-sufficiency level up to 111.6%. In order to reacha 100 % level of self-sufficiency there are strong indications that this will require structural systemchanges as well as behavioral changes

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Haines, Ricci. "The Role of Argininosuccinate Synthase Serine 328 Phosphorylation in Nitric Oxide Production." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4061.

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Until recently, the main mechanism of argininosuccinate synthase (AS) regulation was described to exist mainly at the level of transcription. Transcriptional regulation of AS has been shown to be coordinate with eNOS in response to shear stress, hypoxia, tumor necrosis factor á (TNF-á), and PPAR ã agonist troglitizone. However, it is now understood that one level of NO regulation is cellular control of arginine availability to eNOS via post-translational modifications of AS such as phosphorylation. The purpose of this investigation was to determine under what conditions AS is phosphorylated at S328, identify the pathway that AS phosphorylation at S328 plays a role, and how phosphorylation affects AS function in endothelial cells. We developed a phospho-specific antibody directed against pS328 AS and assayed for increases or decreases in phosphorylation relative to physiological factors. We found that AS phosphorylation at S328 occurred when endothelial cells were stimulated with physiological factors that stimulate nitric oxide production through calcium-dependent stimulation of eNOS. Furthermore, by utilizing kinase inhibitors and kinase knockdown experiments, we showed that phosphorylation at S328 significantly decreased when PKCá was knocked down, suggesting that S328 phosphorylation of AS is involved in PKCá signaling. In addition, by confocal microscopy, immunoprecipitation, and membrane fractionation, we showed that phosphorylation at S328 of AS promotes its co-localization with eNOS in the perinuclear region. These findings describe a novel pathway involving AS regulation of nitric oxide production, and may serve as a novel drug target in the restoration of vascular nitric oxide homeostasis.

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Bach, Frauke [Verfasser], and Iris [Akademischer Betreuer] Bruchhaus. "Exploring the vacuolin gene family, mRNA production, localization and functional characterization in the Mycobacterium marinum - Dictyostelium discoideum model system / Frauke Bach. Betreuer: Iris Bruchhaus." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1053811187/34.

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Alzamil, Hana Abdulrahman. "Localization of terminal prostaglandin synthases and prostaglandin transporter in human intrauterine tissues and the effect of pro-inflammatory cytokines on prostaglandin production at term and preterm labour." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526056.

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Lönnerud, Anne. "Facing Peak Oil and Climate Change: A Pragmatic Approach to a Re-localized Food Production System in Uppsala, Sweden." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-188528.

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Globalization and industrial agriculture have enabled consumers in Sweden and other countries in the Western world to enjoy foodstuffs from many parts of the world at very affordable monetary prices, but at the same time involving a lot of external costs in the form of environmental degradation, and a high dependency on foreign agricultural ecosystems as well as on oil and other non-renewable inputs, thus degrading sustainability and resilience in the food system. Accelerated climate change and the upcoming peak oil crisis call for a reorientation and a transition to a more locally-based system. The prospects for a re-localized food system have been investigated in a case study of Uppsala Municipality, Sweden. The results consist of a study of the current primary food production in Uppsala, also including an allotment garden survey, a study of how much additional food may be produced on idle land, and an analysis of opportunities and challenges for a re-localized food system in Uppsala. The allotment garden survey revealed that c. ten percent of the total area of plots containing cottage houses was used for food production, while the figure for plots without cottages was several times higher, c. 65 percent. The total estimated yield for allotment gardens in Uppsala Municipality was about 90 tons of vegetables and 48 tons of fruits and berries. Quantitative calculations on the yield produced by local farmers, horticulturists and leisure gardeners were made for the five categories grain, dairy products, eggs, meat, and vegetables, fruits and berries, together constituting about 85 percent of the total Swedish food consumption. The estimated balance of supply and demand differed a lot between food categories, ranging from 400 percent for grain to 20 percent for meat as well as for vegetables, fruits and berries. Due to empirical uncertainty, the latter figure should be interpreted with caution. For eggs and dairy products the balance of supply and demand was 67 percent and 50 percent respectively. A quantitative estimation for idle land showed that the greatest potential for an increased food production is within leisure gardening, which could be increased by 3.5 to 6 times. A transition to full self-sufficiency would, however, require drastically altered consumer habits towards seasonal vegetables and fruits and less beef in favor of vegetarian proteins. The qualitative analysis of possibilities and obstacles concluded that the greatest assets for a re-localized food production were the large production capacity within rural agriculture, the abundance of mostly unutilized private garden land, the increased interest for urban agriculture among the population, positive attitudes among consumers towards local food, and a relatively high general awareness of climate change and the need for a more sustainable society. Among the challenges were found lacking economic viability and access to suitable farmland, the centralized food industry, an imbalanced agricultural output, unsustainable consumer habits, the tendency among Swedish municipal planners to support exploitation of fertile soil, and a low awareness among both the population and decision makers regarding peak oil and social resilience generally. Globaliseringen och det industriella jordbruket har möjliggjort för konsumenter i Sverige och andra västländer att få tillgång till matvaror till låga priser och från många olika delar av världen. Samtidigt har detta medfört ett högt pris i form av miljöförsämringar och ett stort beroende av utländsk jordbruksproduktion, samt av olja och andra råvaror som inte är förnybara. Resultatet har blivit ett livsmedelssystem med urholkad hållbarhet och ökad sårbarhet. Accelererande klimatförändringar och den kommande krisen i samband med oljetoppen manar till nyorientering och en övergång till ett mer lokalbaserat system. Denna fallstudie av Uppsala kommun har undersökt utsikterna att återknyta matproduktionen till lokala system. Resultaten omfattar både en studie av den nuvarande matproduktionen i Uppsala, vilken även inkluderade en enkätundersökning av kolonilotter, en studie av potentialen att öka matproduktionen på mark som idag inte används aktivt för det ändamålet, samt en analys av möjligheter och utmaningar för en lokal matproduktion i Uppsala. Enkätundersökningen visade att på kolonilotter med stugor användes ca tio procent av den totala ytan för matproduktion, medan motsvarande siffra för kolonilotter utan stugor var flera gånger högre, ca 65 procent. Den totala skörden för alla kommunala kolonilotter i Uppsala uppskattades till 90 ton grönsaker och 48 ton frukt och bär. För den totala matproduktionen från jordbruket, trädgårdsnäringen och fritidsodlingen gjordes beräkningar för fem olika kategorier: Spannmål, mejeriprodukter, ägg, kött samt grönsaker, frukt och bär, som tillsammans utgör ca 85 procent av den totala svenska matkonsumtionen. Den uppskattade försörjningsbalansen varierade starkt mellan olika kategorier, från 400 procent för spannmål till 20 procent för kött samt för grönsaker, frukt och bär. Osäkerheten kring det vetenskapliga underlaget gällande fritidsodlingen är dock stort, vilket gör att siffrorna för grönsaker, frukt och bär bör tolkas försiktigt. För ägg och mejeriprodukter var försörjningsbalansen 67 procent respektive 50 procent. Studien av obrukad mark visade att den största potentialen för en ökad matproduktion finns inom fritidsodlingen, som beräknades skulle kunna öka med 3.5 till 6 gånger. En övergång till full självförsörjning skulle dock kräva drastiska förändringar i konsumtionsvanorna mot säsongsbetonade grönsaker och frukt samt mindre nötkött till förmån för mer vegetabiliskt protein. Analysen av möjligheter och utmaningar för en återgång till en mer lokal matproduktion pekade på att de största fördelarna är den stora produktionskapaciteten inom jordbruket, den stora sammanlagda arealen privat trädgårdsmark som till stor del är outnyttjad för matproduktion, det ökande intresset för stadsodling bland befolkningen, positiva attityder till lokal mat bland konsumenter, och en relativt hög medvetenhet kring klimatförändringar och behovet av ett mer hållbart samhälle. Bland de viktigaste utmaningarna fanns den bristande ekonomiska lönsamheten inom yrkesodlingen, den centraliserade livsmedelsindustrin, obalansen inom jordbruksproduktionen, med överskott på spannmål och underskott på andra livsmedelsråvaror, ohållbara konsumtionsvanor, tendenser hos svenska kommunala tjänstemän att stödja exploatering av bördig mark, samt den låga graden av medvetenhet hos både befolkningen och beslutsfattarna kring oljetoppen och samhällets sårbarhet generellt.

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Federico, Maxime. "Spatio-temporal description of single photons : from cavity production to local detection." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCK013.

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Ce travail fournit une analyse des propriétés spatio-temporelles d'états à un photon. En commençant par une quantification directement réalisée en espace position, nous démontrons que deux formulations différentes de la théorie sont équivalentes : elles prédisent les mêmes résultats. L'équivalence est formulée sous forme d'un isomorphisme de leurs espaces de Hilbert respectifs. On utilise par la suite cette construction en espace position pour étudier la propagation des photons décrit par des impulsions. Nous démontrons que la dynamique de n'importe quel état du champ électromagnétique quantique est alors donnée par l'évolution temporelle de la représentation de l'état, telle que décrite par les équations de Maxwell classiques. Nous construisons également un modèle de détection locale de photons en utilisant l'opérateur densité d'énergie. Ce modèle nous permet de démontrer la non localité de tout état à un photon grâce à la propriété d'antilocalité de l'opérateur fréquence Ω=c(-Δ)^{1/2}. Nous caractérisons ensuite cette non localité pour un état à un photon produit par l'émission spontanée d'un atome d'Hydrogène et montrons que la décroissance de sa densité d'énergie se comporte asymptotiquement comme pour des distances r loin de l'atome. Enfin, nous nous interessons à la production de photons en cavités pour laquelle nous démontrons au travers d'un argument topologique que, dans la limite adiabatique, l'approximation de l'onde tournante (rotating wave approximation) est justifiée et permet donc la production de photons très proches de photons uniques parfaits. Nous construisons aussi, comme résultat préliminaire, un modèle heuristique utilisant des modes quasinormaux pour décrire la procution de photons dans des cavités ouvertes This work provides an analysis of spatio-temporal properties of single-photon states. Starting with a direct quantization in position space representation, we show that two different formulations are equivalent, i.e., they give the same quantum theory. The equivalence is formulated in terms of isomorphisms of their respective Hilbert space of states. We then use this construction in position space to study the propagation of photons in terms of pulses and we show that the dynamics of any state of the quantum electromagnetic field is given by the classical Maxwell equations for the classical pulse onto which the photons are defined. We also construct a model for local detection of photons using the energy density operator. This model allows us to show the nonlocality of all single-photon states using the anti-local property of the frequency operator Ω=c(-Δ)^{1/2}. We then characterize this nonlocal property for a single-photon state spontaneously emitted by a Hydrogen atom and we show a radial decay of its energy density of 1/r^6 in the asymptotic limit of large distances r from the atom. Finally, we consider the production of photons in cavities where we show through topological arguments that in the adiabatic limit, the rotating wave approximation is justified and thus the photons produced with these techniques can be very close to perfect single photons. We also construct as a preliminary result a heuristic model using quasinormal modes to describe the production of photons inside leaky cavities

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Corbin, Karen Davidowitz. "Multi-Level Regulation Of Argininosuccinate Synthase: Significance For Endothelial Nitric Oxide Production." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002692.

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Salomon, Guillaume. "Production tout optique de condensats de Bose-Einstein de 39K : des interactions contrôlables pour l’étude de gaz quantiques désordonnés en dimensions réduites." Thesis, Palaiseau, Institut d'optique théorique et appliquée, 2014. http://www.theses.fr/2014IOTA0009/document.

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Ce travail de thèse rapporte la production tout optique de condensats de Bose-Einstein de 39K. Une étape clé du processus expérimental est l’obtention d’un nuage suffisamment froid permettant le chargement direct d’un piège dipolaire de manière efficace. Notre solution est l’utilisation d’une mélasse fonctionnant dans le bleu de la raie D1 de cet alcalin conduisant à une densité dans l’espace des phases élevée et ainsi au chargement direct d’un grand nombre d’atomes dans un piège à 1550 nm. Le nuage est ensuite polarisé puis comprimé dans un piège dipolaire croisé avant d’entamer un refroidissement évaporatif efficace au voisinage d’une résonance de Feshbach. Ce processus permet la production rapide de condensats de Bose-Einstein toutes les 7 secondes sur notre expérience. Ces nuages dégénérés représentent le point de départ pour la conduite d’expériences visant à étudier les effets du désordre dans les gaz quantiques en dimensions réduites. Nous envisageons l’étude du diagramme de phase du gaz de Bose bidimensionnel désordonné, de la localisation d’Anderson en dimension deux ainsi que l’étude de l’influence du désordre sur un soliton brillant dans une géométrie unidimensionnelle This thesis presents the all optical production of 39K Bose-Einstein condensates. A key point in the process is the sub-Doppler cooling that allows for an efficient loading of an optical dipole trap. To this aim we use a gray molasses scheme working on the blue side of the D1 line of this alkali that leads to a high phase space density and a high number of trapped atoms in a 1550 nm optical trap. The cloud is then polarized and compressed in a crossed dipole trap before starting an efficient forced evaporation close to a Feshbach resonance. This process allows us to produce Bose-Einstein condensates every 7 seconds with our experiment. Those degenerate clouds represent the starting point of experiments aiming to study the influence of disorder on quantum gases in low dimensions. We discuss the perspectives to study of the phase diagram of the two-dimensional disordered Bose gas as well as the Anderson localization phenomenon in two dimensions and the behaviour of bright solitons in a disordered potential in a one-dimensional geometry

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Kniūkšta, Bernardas. "Šalies įsitraukimo į biodegalų gamybą vertinimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20140123_134539-14582.

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Tyrimo tikslas – nustatyti įsitraukimo į biodegalų gamybą veiksnius ir įvertinti šalies įsitraukimą į biodegalų gamybą integralumo nacionalinėje ekonomikoje požiūriu. Darbo praktinė vertė. Biodegalų gamyba yra viena iš šiuolaikinės bioekonomikos sričių, kuria susidomi vis daugiau pasaulio šalių. Pastarasis dešimtmetis gali būti apibūdinamas kaip intensyvios biodegalų gamybos plėtros laikotarpis. Šalys, įsitraukdamos į biodegalų gamybą, siekia prisidėti prie darnios energetikos vystymosi. Darbe analizuojama, kaip šalies įsitraukimo į biodegalų gamybą veiksniai varijuoja priklausomai nuo šalies turtingumo naftos ištekliais. Nustatyta, kokie yra dominuojantys įsitraukimo į biodegalų gamybą veiksniai specifinėse šalių grupėse ir kokiu integralumu nacionalinėje ekonomikoje biodegalų gamyba pasižymi šiose šalyse. Tyrimas patvirtina, kad net ir paskatintas politinių iniciatyvų, biodegalų pramonės steigimasis šalyje paprastai grindžiamas išskirtinai didesniu apsirūpinimu biodegalų gamybos ištekliais arba didesne iškastinių energetinių išteklių stoka. Gautos tyrimo išvados gali pasitarnauti formuojant valstybės energetinės politikos gaires alternatyvios energetikos plėtotei. Mokslinio darbo naujumas. Šalies įsitraukimo į biodegalų gamybą vertinimo rezultatai papildo ekonomikos mokslo žinias apie egzistuojančius ryšius tarp ekonominių veiklų plėtojimo ir joms reikalingų gamybos išteklių šalyje gausos. Šių ryšių egzistavimas darbe atskleidžiamas analizuojant bioetanolio gamybą. Tyrimas... [toliau žr. visą tekstą] Research aim – to identify factors behind engagement in biofuel production and evaluate engagement by a country in terms of production integration in the national economy. Practical value of the research. The production of biofuels is one of the most modern areas of the bioeconomy, which involves more and more countries around the world. The last decade can be described as an intense period of the development of biofuel production. Engaging in the production of biofuels countries seek to contribute to the sustainable energy development. In this research the analysis of factors of country’s engagement in biofuel production, depending on the oil richness of the country, is performed. It was analysed which factors determine the engagement in biofuel production in different groups of countries and which parameters of biofuel production integration in national economy are satisfied in these counties. The study confirms that biofuel industry establishment in the country, even promoted by political initiatives, is usually based on purely larger self-sufficiency in production resources or higher scarcity of fossil energy resource. The resulting findings can serve in shaping the state's energy policy guidelines for the development of alternative energy sources. Originality of the research work. The obtained results supplement the scientific knowledge in economics about the existence of the relationships between development economic activities and the abundance of necessary production... [to full text]

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17

Papet, Léo. "Localisation des sons chez les crocodiliens." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1337.

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Les crocodiliens ont développé des capteurs très précis pour sonder leur environnement jusqu'à atteindre leur position de super prédateur. Ces capacités sensorielles sont primordiales en situation de chasse mais elles sont également nécessaires pour assurer les interactions sociales entre partenaires sexuels ou entre parents et jeunes. Depuis l'intérieur des œufs, les embryons matures utilisent la communication acoustique pour synchroniser l'éclosion. Dans leurs premières années, les jeunes vocalisent en cas de danger pour solliciter la protection de leurs parents et assurer la cohésion du groupe afin de limiter les risques de prédation. Enfin, les vocalisations sont utilisées en parade nuptiale avant l'accouplement. Pour assurer la communication acoustique et pour chasser leurs proies depuis l'interface air-eau, les crocodiliens doivent localiser avec précision les multiples sources sonores de leur environnement. Si la perception acoustique a été un sujet d'intérêt pendant plusieurs années, les capacités de localisation sonore des crocodiliens ont été rapportées comme précises mais n'ont été étudiées que rarement. Les oiseaux, et en particulier les oiseaux vocaux, ont été testés à de nombreuses reprises pour comprendre les processus et les performances de localisation des sons, mais ces caractéristiques restent mal connues chez les espèces apparentées les plus proches : les crocodiliens. Quand ils chassent, les crocodiliens nécessitent une localisation sonore précise de leur proie. La plupart des espèces de crocodiliens sont opportunistes mais une caractéristique commune est leur méthode de chasse à l'affût ne laissant émerger que les yeux, les oreilles et les narines. Une bonne localisation est également nécessaire au cours de leur vie pour assurer leurs interactions sociales.Tout d'abord, nous avons mesuré les indices acoustiques de localisation en plaçant des microphones à l'intérieur des oreilles d'animaux juvéniles. En déplaçant une source sonore autour de l'animal, nous avons pu quantifier les signaux monauraux (fonctions de transfert relative à la tête, HRTF) et binauraux (ILD et ITD). Ensuite, nous avons entraînés des crocodiles du Nil à venir à une source sonore lorsqu'ils émettent un signal spécifique. Nous avons pu quantifier leurs performances de localisation sonore en utilisant séparément l'ILD et l'ITD. Enfin, nous avons mené des expériences de playbacks dans un environnement artificiellement bruyant. Cette dernière partie est basée sur une triple approche, en testant : des caïmans Yacare dans la nature avec des cris de détresse de jeunes individus ; des crocodiles du Nil en diffusant des appels de ses congénères ; des crocodiles du Nil entraînés dans une expérience Go/No-Go, assurant une forte motivation.Nous avons constaté que la morphologie externe de la tête des crocodiliens induit des indices acoustiques pertinents en fonction de la position de la source sonore. En mesurant les indices monauraux lorsque l'animal se reposait sur le sol et dans la position naturelle de chasse à l'interface entre l'air et l'eau - nous avons démontré que ces repères sont conservés même lorsque seulement une petite partie de la tête est émergée. Ce résultat peut suggérer une adaptation potentielle à cette position de chasse spécifique assurant des indices de localisation importants. Les crocodiles testés font preuve d'une très grande précision au cours de tâches de localisation sonore. Nos expériences ont montré que l'ITD et l'ILD sont pertinents pour estimer la position d'une source sonore et nous avons mesuré l'angle minimum audible (MAA) pour la première fois dans l'ordre des crocodiliens. Enfin, en présence d'une source de bruit dans leur environnement, les crocodiliens utilisent le démasquage spatial pour améliorer la détection de signaux acoustiques pertinents Crocodilians developed very accurate sensors to probe their environment until raising their apex predator position. These sensory abilities are primordial in hunting situation but they are also needed to ensure social interactions between sexual partners or between parents and young. Since inside the eggs, the mature embryos use acoustic communication to synchronise the hatch. In their first years, juveniles use to call in case of danger for the help of their parents and ensure the cohesion of the group to limit the predation risks. Finally, acoustic vocalisations are used in courtship before mating. To ensure acoustic communication and to hunt their preys from the air-water interface, crocodilians need to precisely localise the multiple sound sources from their environment.If the acoustic perception was a subject of interest for several years, crocodilians’ sound localisation abilities were noted to be accurate but were studied only a few times. One situation in which crocodilians need to precisely locate a sound source is when they are hunting. Sound localisation is also necessary during their first years when they are subject to predation. When they feel in danger, young crocodilians use distress calls which are relevant to signal their position to their parents when eliciting a protection behaviour from them. Finally, sound localisation may be used to find a partner in the wild when we know that some species are capable of long journeys.To explore sound localisation in crocodilians, we quantified their sound localisation abilities and observed observe how they are able to deal within a noisy environment. First, we measured sound localisation cues by placing microphones inside the ears of juvenile animals. By moving a sound source around the animal, we were able to quantify monaural (Head-Related Transfer Functions, HRTF) and binaural cues (Interaural Level and Time Differences, ILD and ITD). Then, we trained Nile crocodiles to come to a sound source when playing a specific signal. By filtering these signals before playing them to the animal, we were able to quantify their sound localisation performances when using separately ILD and ITD. Finally, we conducted some playbacks experiments in an artificially noisy environment. This last part was constituted by a triple approach, by testing: Yacare caimans in the wild with distress calls of hatchlings; Nile crocodiles hatchlings by simulating a separation from the group and broadcasting calls from its congeners; trained Nile crocodiles in a Go/No-Go experiment, ensuring a high motivation.We evidenced that the external morphology of the crocodilians head induces potentially relevant external acoustic cues depending on the position of the sound source. By measuring the monaural cues in two situation -when the animal was resting on the ground and in the natural hunt position at the interface between air and water- we demonstrated that those cues are conserved even when only a small part of the head is emerged. This result may suggest a potential adaptation to this specific hunting position ensuring strong localisation cues. The tested crocodiles evidence very precise abilities in sound localisation tasks. Our experiments showed that both ITD and ILD are relevant when estimating the position of a sound source and we measured the Minimum Audible Angle (MAA) for the first time in the crocodilians order. Finally, in a presence of a noise source in their environment, crocodilians perform Spatial Release from Masking to increase the detection of relevant acoustic signals

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18

Torre, Lucimara Gaziola de la 1971. "Desenvolvimento de vacina genica veiculada em adjuvantes lipidicos para tratamento da tuberculose." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266289.

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Orientador: Maria Helena Andrade Santana Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica Made available in DSpace on 2018-08-08T14:24:33Z (GMT). No. of bitstreams: 1 Torre_LucimaraGazioladela_D.pdf: 28769884 bytes, checksum: 485f026c87d2f5b4fb99e642474200d0 (MD5) Previous issue date: 2006 Resumo: Este trabalho visa o desenvolvimento tecnológico de uma vacina gênica, destinada ao combate à tuberculose, na qual o DNA encontra-se veiculado em lipossomas. Foram enfocados três aspectos principais: 1.A preparação e caracterização de estruturas lipídicas funcionais veiculando o DNA, projetadas para atenderem aos requisitos de imunização contra a tuberculose; 2. Complexação do DNA com peptídio sintético promotor de transporte nuclear e veiculação na estrutura lipossomal que se mostrou mais promissora nos ensaios in vitro e in vivo realizados no CPT-RP. 3. Análise do escalonamento da produção da estrutura lipossomal mais promissora para subsequente veiculação do DNA. Duas estruturas lipossomais foram compostas por lipídios com as seguintes funcionalidades: estrutural, de incorporação do DNA e atração eletrostática com a superfície das células, de intensificação da liberação do DNA no citoplasma celular. Foram preparadas pelo método da desidratação-rehidratação, gerando DRVs (¿dehydrated-hydrated vesicles¿). O DNA foi associado à essas estruturas, localizando-se no interior, [DRV(DNA)] ou prefencialmente na sua superfície [DRV-DNA]. A terceira estrutura, um agregado lipídico não lipossomal designado por lipoplexo, foi preparado na ausência do lipídio estrutural, contendo o DNA associado em toda a sua superfície. As estruturas foram caracterizadas através do seu diâmetro hidrodinâmico e distribuição de tamanhos, razão de cargas para completa incorporação do DNA, carga superficial, transição de fases, acessibilidade de sonda de fluorescência ao DNA e morfologia. O peptídio sintético com seqüência não convencional foi associado à estrutura DRV-DNA. O escalonamento da produção de lipossomas foi analisado através de dados experimentais e simulação matemática da cinética de produção de lipossomas em sistema multitubular. Dos resultados conclui-se que a estrutura DRV-DNA é promissora para a produção de vacina contra a tuberculose tanto pela sua efetividade biológica quanto do ponto de vista tecnológico Abstract: This work contributes to the technological development of a gene vaccine against tuberculosis, where DNA is transported within liposomes. The three main aspects focused on were: 1. Functional lipid structures for DNA delivery were prepared and characterized in the attempt to obtain immunization standards against tuberculosis; 2. The best lipid structure was chosen from in vitro and in vivo assays performed in the ¿Centro de Pesquisas em Tuberculose de Ribeirão Preto¿ ¿ CPT-RP. A synthetic peptide that promotes nuclear transport was complexed to DNA and included into the best lipid structure. 3. Scale up analysis for the production of the best lipid structure that was used for DNA delivery. Two types of liposomes were composed by lipids with the following properties: (i) structure, (ii) DNA incorporation and electrostatic attraction with cell surface, and (iii) helper, that facilitates the DNA release to the citosol. These structures were prepared by the dehydrated-hydrated method, generating DRVs (dehydrated-hydrated vesicles). The DNA was associated in the inner compartment, [DRV(DNA)], or mostly at the surface [DRV-DNA] of these structures. The third structure, a lipid aggregate that does not form liposomes and was named lipoplex, was prepared in the absence of the structural lipid, used in previous preparations, which contained DNA associated with all of the aggregate¿s surface. The physico-chemical characterization of the structures were based on the hydrodynamic diameter and size distribution of the lipid particles, charge ratio for DNA incorporation into the lipid structure, surface charge, phase transition temperatures, the fluorescent probe accessibility to DNA and morphology of the particles. A synthetic peptide, with non-conventional sequence was associated to the DRV-DNA structure. The scale up for the liposome production was analyzed through the acquisition of experimental data and mathematical simulation of the liposomes production in a multitubular system. The results demonstrate that the incorporation of DNA into a lipid structure is very promising as a tuberculosis vaccine, especially in regards to the complexation of DNA with empty DRVs. The technological aspects of scaling up also confirm the viability of preformed liposomes production Doutorado Desenvolvimento de Processos Biotecnologicos Doutor em Engenharia Química

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19

Gmitrová, Zuzana. "Chemický priemysel v ČR." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-85192.

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The thesis deals with the analysis of spatial distinction of the chemical industry in the Czech Republic. The main aim of the thesis is to evaluate the disposition of chemical production in the Czech Republic and using the tools of spatial analysis, mainly location quotients and the Lorenz curve, to identify areas with the highest concentration of the chemical production. Further to identify areas with the greatest potential for the localization and development of the chemical production. The theoretical part of the thesis describes the economic aspects of the localization of the industry and defines the chemical industry itself in a broader context. The practical part deals with the position of the chemical industry in the Czech Republic and focuses on the territory analysis which identifies the regions with the highest concentration of the chemical industry in the Czech Republic

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20

Petrecca, Kevin. "Ion channel localization and determinants of localization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0033/NQ64643.pdf.

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21

Petrecca, Kevin. "Ion channel localization and determinants of localization." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36679.

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Ion channels constitute a class of proteins that is ultimately responsible for generating and coordinating electrical signals passing through the brain and heart. In order for ion channels to fulfill these roles a number of coordinated events must ensue at the protein level. Newly translated polypeptides entering the endoplasmic reticulum (ER) must be correctly processed and folded in order to exit. In the case of voltage-dependent ion channels, the channel alpha subunits, which form the channel pore, oligomerize with like (or unlike) alpha subunits and/or auxiliary (beta) subunits, depending on the channel type. Further posttranslational modifications take place within the Golgi apparatus before the channels embark for their final destination. Once there, or prior to their arrival, they interact with cytoskeletal elements that serve to anchor the channel in place and tether accessory elements involved in ion channel modulation and signaling. Here, I have investigated the role of N-linked glycosylation in the surface membrane expression of a K+ channel, human ether-a-go-go related gene (HERG), mutation of which can give rise to the cardiac disease long QT. Pharmacological and site-directed mutagenesis reveal that N-linked glycosylation is required for proper channel processing and cell surface expression of HERG as determined through immunoblot, immunocytochemical and electrophysiological analysis. Removal of glycosylation leads to an intracellular retention of HERG. Furthermore, I have examined the subcellular localization of the Na+/H+ exchanger (NHE1 isoform) in cardiomyocytes using immunocytochemical techniques and found that it exhibits a restricted subcellular localization at the intercalated disc. Along the same line, using the yeast two-hybrid screening technique, I have identified an actin-binding protein, filamin, that directly interacts with and plays a role in the subcellular localization of a prominent heart and brain K + channel, Kv4.2.

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22

Jacobs, David M. "Casimir Localization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396608069.

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23

Seye, Alioune. "Localization in the quantum Hall effect : a magnetic localization approach." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAX149.

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Cette thèse explore les propriétés de localisation des solutions du problème aux valeurs propres de l'opérateur de Schrödinger magnétique avec potentiel désordonné, qui modélise l'effet Hall quantique (QHE) dans une description sans interaction. En se restreignant au premier niveau de Landau, nous comparons les états propres calculés numériquement aux prédictions dérivées du paysage de localisation magnétique (MLL).La localisation joue un rôle central dans l'effet Hall quantique entier (IQHE). Les forts champs magnétiques permettent des approximations semi-classiques pour estimer l'énergie et le courant des états propres, facilitant l'étude des transitions entre plateaux. Cependant, notre compréhension de la localisation en dehors des champ magnétique intense reste incomplète. Pour étudier cette question, nous introduisons la théorie du paysage de localisation (LL) qui intègre les effets du désordre sur les états propres de manière déterministe dans un potentiel effectif, et son extension magnétique, le MLL, ouvrant ainsi une nouvelle perspective sur la localisation dans les systèmes magnétiques désordonnés.En utilisant une méthode des éléments finis invariante par changement de jauge, nous résolvons numériquement le problème aux valeurs propres de Schrödinger magnétique et analysons les propriétés de localisation des états propres. Le MLL fournit un potentiel effectif qui peut être interprété de manière semi-classique dans le régimes où l’intensité du champ magnétique et la force du désordre sont comparables. Les états propres se localisent dans les puits et sur les crêtes de ce potentiel effectif, leurs énergies correspondant étroitement aux valeurs du potentiel effectif aux points de densité de probabilité maximale. Par ailleurs, la distance d’Agmon fondée sur le MLL offre une estimation fiable de la décroissance exponentielle des états de basse énergie.Nos résultats suggèrent que le MLL décrit efficacement le potentiel vu par le centre d'orbite des états propres, offrant ainsi une interprétation à la fois simplifiée et appropriée à l'étude de la localisation dans ces systèmes magnétiques désordonnés This thesis explores the localization properties of solutions to the disordered potential magnetic Schrödinger eigenvalue problem, modeling the quantum Hall effect (QHE) in the single-particle framework. Focusing on the first Landau level, we compare numerically computed eigenstates to predictions derived from the Magnetic Localization Landscape (MLL).Localization plays a pivotal role in the Integer Quantum Hall Effect (IQHE), where strong magnetic fields enable semiclassical simplifications for estimating energy and current, providing insight into plateau transitions. However, our understanding of localization beyond the large magnetic field regime remains incomplete. To address this, we introduce the localization landscape (LL) theory and its magnetic extension, the MLL, which incorporates magnetic effects into the deterministic framework of the LL, enabling a new perspective on localization in disordered magnetic systems.Using a gauge-invariant finite element method, we solve the magnetic Schrödinger eigenvalue problem numerically and analyze the localization properties of the eigenstates. The MLL offers an effective potential that can be interpreted semiclassically in regimes where magnetic intensity and disorder strength are comparable. Eigenstates localize on the wells and hills of this effective potential, with their energies closely matching the effective potential values at points of maximal probability density. Moreover, the MLL-based Agmon distance provides a reliable estimate of the exponential decay for low-energy eigenstates.Our findings suggest that the MLL effectively describes the potential seen by the center of orbit associated to eigenstates, offering a simplified yet insightful model to describe localization of such magnetic disordered systems

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Ekberg, Pontus. "Swarm-Intelligent Localization." Thesis, Uppsala University, Department of Information Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-108042.

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In wireless sensor networks we often want to know where individual sensor nodesare physically positioned in order to make sense of the data that they report. Theprocess of obtaining such position information for the nodes is known as localization.Simple solutions to the problem of localization are to either place the nodes manuallyat specified places, or to use some special localization hardware such as GPSreceivers. However, these solutions can be impractical or too costly, especially forlarge networks. Instead we can use some algorithm to try to compute the nodes'positions based on available data. We present a new distributed algorithm, which wecall Swarm-Intelligent Localization (SIL), for computing these positions. Our algorithmassumes that a fraction of the nodes, the so-called anchors, have an a prioriknowledge of their positions, and that noisy range measurements can be madebetween neighbouring nodes in the network. The average computational complexityper node running SIL is constant in the network size, and linear in the connectivity ofthe network. We evaluate the algorithm through simulations of different networktopologies with varying parameters, such as network size, range measurement errors,fraction of anchors and connectivity. The results of the simulations indicate that inmost cases SIL can successfully locate the majority of sensor nodes with reasonableaccuracy, even in the face of difficulties such as large distance measurement errors.

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Rau, Alexander V. "Relative-position localization." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403983.

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26

Connell, Claire M. "Survivin : Functional Localization." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504378.

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Smith, Adam. "Disorder-free localization." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/282870.

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The venerable phenomena of Anderson localization, along with the more recent many-body localization (MBL), both depend crucially on the presence of disorder. Here we introduce a family of simple translationally invariant models of fermions locally coupled to spins, which have a disorder-free mechanism for localization. This mechanism is due to a local $\mathbb{Z}_2$ gauge symmetry and we uncover the connection to lattice gauge theories. We diagnose the localization through long-time memory of initial conditions after a global quantum quench. One of the defining features of the models that we study is the binary nature of the emergent disorder, related to the $\mathbb{Z}_2$ degrees of freedom. This results in a qualitatively different behaviour in the strong effective disorder limit compared to typically studied models of localization. For example it gives rise to the possibility of a delocalization transition via quantum percolation in higher than one dimension. In connection to the recently proposed quantum disentangled liquid (QDL) we also study the entanglement properties of our models. The QDL provides an alternative to both complete localization and to the eigenstate thermalization hypothesis. Our models highlight the subtlety of defining a QDL and we offer new insights into their entanglement properties. While the simplest models we consider can be mapped onto free fermions, we also include interactions which leads to MBL-like behaviour characterised by logarithmic entanglement growth. We further consider interactions that generate dynamics for the conserved charges, which give rise to only transient localization behaviour, or quasi-MBL. Finally, we present a proposal for the experimental measurement of gauge field correlators for our model in two-dimensions. This proposal is based on interferometric techniques which are feasible using current experimental capabilities. Furthermore, the interacting generalizations of our models can be similarly implemented in experiments, providing access to the dynamics of strongly interacting lattice gauge theories, beyond what can be simulated on a classical computer.

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28

Zhao, Nilu. "Acoustic source localization." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104271.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016. Cataloged from PDF version of thesis. Includes bibliographical references (pages 59-61). Many technologies rely on underwater acoustics. Most of these applications are able to denoise Gaussian noise from the surrounding, but have trouble removing impulse like noises. One source of impulse-like noise is the snapping shrimps. The acoustic signals they emit from snapping their claws hinder technologies, but can also be used as a source of ambient noise illumination due to the rough uniformity in their spatial distribution. Understanding the spatial distributions of these acoustic signals can be useful in working to mitigate or amplify their effects. Our collaborators in Singapore use a multi-array sensor to take measurements of the sound pressures of the environment in the ocean. This thesis investigates in solving the signal reconstruction problem -- given the measurements, reconstruct the locations of the original signal sources. A numerical model for the system consisting of the snapping shrimp signals, the environment, and the sensor is formulated. Three methods of reconstruction -- Disciplined Convex Programming, Orthogonal Matching Pursuit, and Compressive Sensing -- are explored, and their robustness to noise, and sparsity are examined in simulation. Results show that Two-Step Iterative Shrinkage Threshold (TwIST) is the most robust to noisy and non-sparse signals. The three methods were then tested on real data set, in which OMP and TwIST showed promising consistency in their results, while CVX was unable to converge. Since there is no available information on ground truth, the consistency is a promising result. by Nilu Zhao. S.M.

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Liu, Yi Ph D. Massachusetts Institute of Technology. "Compressive super-localization." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/103483.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016. Cataloged from PDF version of thesis. Includes bibliographical references (pages 127-135). Localization accuracy is a fundamental quantity of an imaging system, since it often determines the performance (e.g. effective resolution, sensitivity) of the system. This thesis studies the influence on localization accuracy of finite sampling rate, number of samples, and noise in the data acquisition process. Two classes of super-localization problems will be investigated. The first class of problem aims to improve the accuracy in localizing and tracking the physical position of an object of interest. For lateral localization problems, the key parameters to consider are the pixel size as compared to the size of the point spread function (PSF) of the imaging system, and to the amount of motion of the object of interest. If the pixel size is larger than PSF or object motion, accurate localization essentially becomes solving an under-sampling problem. In this thesis, a compressive holography algorithm is proposed to localize smaller than pixel size motion. 1/45 sub-pixel motion has been successfully detected. For axial localization problems, the localization accuracy will be affected not only by the pixel size and number of pixels, but also by the imaging geometry. Traditional axial localization methods are fundamentally limited by the finite numerical aperture of the optical system. In this thesis, a class of compressive reconstruction method that exploits the "sparse" prior knowledge about the object in order to alleviate the missing angular information has been investigated and 1/16 depth of field (DOF) axial displacement was successfully extracted. Successful implementation of the compressive holography based super-localization technique has been applied to image biomimetic sensors inspired by harbor sea seal whiskers for studying vortex-induced vibrations and wake-induced vibrations. The second class of super-localization problem under investigation is to detect weak signals buried under strong background and noise. A compressive reconstruction method that is able to detect signals captured with extremely low signal-to-noise ratio (SNR) and signal-to-background ratio (SBR), by exploiting different "sparsities" in the respective signal and background subspaces has been demonstrated. by Yi Liu. Ph. D.

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Teague, Bryan (Bryan Andrew). "Scalable network localization." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112481.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2017. Cataloged from PDF version of thesis. Includes bibliographical references (pages 69-73). This thesis introduces the Peregrine system, the first known real-time cooperative 3D wireless localization network. The Peregrine system comprises two major components: a hardware testbed; and a suite of distributed real-time algorithms to solve the highly interrelated problems of Node Prioritization, Node Activation, and Node Localization. Each node in the hardware testbed is a low-cost business card-sized device, made up of a microprocessor, a commercially available ultra-wideband (UWB) radio, and a small battery for portability. The algorithmic portion of the Peregrine system leverages recent research in the area of wireless network localization (WNL). Node Prioritization selects the best neighbor nodes for localization by solving a convex optimization problem that uses the squared position error bound (SPEB) as an objective function. Node Activation controls channel access through the calculation of a optimal binary activation probability. Node Localization is developed in the context of a globally optimum Bayesian estimation problem and solved by means of the sigma point belief propagation (SPBP) algorithm. SPBP calculates accurate position estimates from UWB range measurements by enabling spatial and temporal cooperation. The overall system performance and the impact of each algorithmic component is validated through indoor localization experiments. The results confirm that Peregrine is reliable and scalable while maintaining decimeter level position accuracy indoors. by Bryan Teague. S.M.

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Peterson, John Ryan. "Autonomous Source Localization." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97954.

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This work discusses the algorithms and implementation of a multi-robot system for locating radioactive sources. The estimation algorithm presented in this work is able to fuse measurements collected by γ-ray spectrometers carried by an unmanned aerial and unmanned ground vehicle into a single consistent estimate of the probability distribution over the position of a point source in an environment. By constructing a set of hypotheses on the position of the point source, this method converts a non-linear problem into many independent linear ones. Since the underlying model is probabilistic, candidate paths may be evaluated by their expected reduction in uncertainty, allowing the algorithm to select good paths for vehicles to take. An initial hardware test conducted at Savannah River National Laboratory served as a proof of concept and demonstrated that the algorithm successfully locates a radioactive source in the environment, and moves the vehicle to that location. This approach also demonstrated the capability to utilize radiation data collected from an unmanned aerial vehicle to aid the ground vehicle’s exploration. Subsequent numerical experiments characterized the performance of several reward functions and different exploration algorithms in scenarios covering a range of source strengths and region sizes. These experiments demonstrated the improved performance of planning-based algorithms over the myopic method initially tested in the hardware experiments. Doctor of Philosophy This work discusses the use of unmanned aerial and ground vehicles to autonomously locate radioactive materials. Using radiation detectors onboard each vehicle, they are commanded to search the environment using a method that incorporates measurements as they are collected. A mathematical model allows measurements taken from different vehicles in different positions to be combined together. This approach decreases the time required to locate sources by using previously collected measurements to improve the quality of later measurements. This approach also provides a best estimate of the location of a source as data is collected. This algorithm was tested in an experiment conducted at Savannah River National Laboratory. Further numerical experiments were conducted testing different reward functions and exploration algorithms.

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Canadas, Maria Belen. "Cooperative EKF localization." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11730075.

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Ahmed, Ahmed Abdol-Monem. "Experimental study of localization in sensor networks and design of adaptive localization." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/5829.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2005. The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (Novembr 15, 2006) Vita. Includes bibliographical references.

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Otten, Jörn. "Factors influencing acoustical localization." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963701517.

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Meng, Lili. "Learning image-based localization." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63112.

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Image-based localization plays a vital role in many tasks of robotics and computer vision, such as global localization, recovery from tracking failure, and loop closure detection. Recent methods based on regression forests for camera relocalization directly predict 3D world locations for 2D image locations to guide camera pose optimization. During training, each tree greedily splits the samples to minimize the spatial variance. This thesis develops techniques to improve the performance camera pose estimation based on regression forests method and extends its application domains. First, random features and sparse features are combined so that the new method only requires an RGB image in the testing. After that, a label-free sample-balanced objective is developed to encourage equal numbers of samples in the left and right sub-trees, and a novel backtracking scheme is developed to remedy the incorrect 2D-3D correspondence in the leaf nodes caused by greedy splitting. Furthermore, the methods based on regression forests are extended to use local features in both training and test stages for outdoor applications, eliminating their dependence on depth images. Finally, a new camera relocalization method is developed using both points and lines. Experimental results on publicly available indoor and outdoor datasets demonstrate the efficacy of the developed approaches, showing superior or on-par accuracy with several state-of-the-art baselines. Moreover, an integrated software and hardware system is presented for mo- bile robot autonomous navigation in uneven and unstructured indoor environments. This modular and reusable software framework incorporates capabilities of perception and autonomous navigation. The system is evaluated are in both simulation and real-world experiments, demonstrating the efficacy and efficiency of the developed system. Applied Science, Faculty of Mechanical Engineering, Department of Graduate

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Jacobsen, Karin Marie. "Triangulated categories and localization." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for matematiske fag, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18345.

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We study Gabriel-Zisman localization, localization by a multiplicative system and by a null system. We define the triangulated category and the derived category. Finally we describe a scheme for localization from a triangulated category to a module category.

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Nilsson, John-Olof. "Infrastructure-free pedestrian localization." Doctoral thesis, KTH, Signalbehandling, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133443.

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Knowledge of your own and other's positions are frequently a prerequisite for acting, leading others, and interacting in and with the environment; to retrieve relevant information and to process and interpret it; and to understand, compile, and learn from observations of the surrounding and its dynamics. This holds for humans as well as for machines and systems made for supporting and controlling them. Consequently, systems which automatically provide position information of peoples are of interest and the larger subject area of this thesis. Position can be obtained from well-known infrastructure based systems such as GPS. However, these systems carry obvious drawbacks in their infrastructure dependence which gives them limited coverage and system robustness. By observing our own ability to localize ourselves, it is obvious that localization without infrastructure at with a better (relative) accuracy is achievable. The development over the last decades of sensor and processing hardware and statistical methods have started to make such localization possible. This thesis specifically concerns systems and statistical methods for infrastructure-free localization. The this primarily deals with statistical methods but also describe hardware in terms of high-level system designs. For many critical applications such as positioning of emergency responders, dismounted soldiers, and security personnel, it is unsuitable for the positioning system to be dependent on infrastructure or prior knowledge about the environment. Consequently, this thesis deals with systems and methods for infrastructure-free and prior-knowledge-free pedestrian localization. The thesis is specifically concerned with statistical methods but will also cover hardware in terms of high-level system designs. The thesis is composed of an introduction followed by a collection of papers which are divided into two parts, each concerning a separate problem area. The introduction motivates and describes the localization problem in general terms and gives a coherent guide to the articles. The first group of articles together describes an infrastructure-free system for tactical localization of small units of agents. The physical implementation of the localization system carries the name TOR (Tacitcal lOcatoR) and have been tested on fire fighters during realistic smoke diving exercises. This system primarily depends on pedestrian dead-reckoning based on foot-mounted inertial navigation and inter-agent radio ranging. The core parts of the system which are dealt with are: foot-mounted inertial navigation units which provides dead reckoning of individual agents, system structure and estimation algorithms which, based on the dead reckoning and inter-agent ranging, provides estimates of the agent positions, initialization algorithms for the estimation, and a user interface which exploits voice radio communication and 3D-audio to let the agents hear where they have each other. The second group of articles concerns low-level processing for extraction of spatial information of camera images (video), a prevailing infrastructure-free data source for relating an agent's position to the environment. These articles are focused on formalization and fast implementations of fundamental processing steps. An implementation of scale-space only relying on integer signal representation of image data and simple arithmetic operations is presented. Further, a unifying theory of feature point orientation assignment is derived and a novel method for the same is presented. Thereafter, the small but frequently occuring processing step in which image gradient samples are binned based on their argument, is treated and three fast solutions with varying properties are suggested. Finally, a localization system based on inertial navigation aided by imagery data is presented. QC 20131105

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Shotter, Emily. "Absolute auditory object localization." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/10833.

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This thesis concerns the potential use of auditory virtual reality (A VR) in safety-critical situations. Localization accuracy is essential in many VR situations, such as simulated cockpits, where vision is fully occupied and targets must be signified acoustically. However, the errors reported for localizing 3D sounds varies considerably in the literature and some (e.g. Wightman & Kistler, 1989; Wenzel et aI, 1993) report fairly large errors. This thesis consists of an evaluation of the use of acoustic cues to indicate the location of certain targets. A Knowles Electronic Manikin for Acoustic Research (KEMAR) was used to examine the effects of individualized pinnae on localization accuracy. The results showed that using our own pinnae over foreign pinnae provides little or no benefit. More surprisingly, substantial errors were observed in this study. This initial result drove the fundamental investigation into the large angle errors. The method of eliciting subject responses was investigated. The findings established response method as an important methodological feature in localization experiments from the significant effect it has on the results. Error values can be halved when using a categorical method, compared to an unguided (non-categorical) method, possibly because it constrains the subjects' response options. A further possible constraint on subject responses is the effect of memory in absolute judgement tasks. If the memory of one sound impinges on subsequent sounds then the subject's judgement is constrained and the measurement of error may be contaminated. This effect was studied by introducing variable delays that should affect memory .(0 a different extent. No obvious differences in accuracy were noted. This rules out 'interstimulus interval' as a cause for the variability of reported angle errors. Stimulus types were varied in an effort to maximise acuity. Although broadband sounds are purported to give the smallest errors (e.g. Stevens & Newman, 1936; Sandel et aI, 1955), this investigation offered a unique comparison of long and shortduration broadband and complex sounds. But consistently high angle errors forced the inclusions of non-acoustic cues such as vision and head movements, which decreased the error to between 0° and 7°. III The implicatioos for VR in light of the importance of vision (demonstrated by this work), are that it is 'not advisable to implement an auditory cueing system that may conflict or fail to be guided by vision. Where high levels of accuracy are required, as is paramount in safety-criticalsituations, auditory localizatioo is not sufficient as a sole cue to target location. Scientific conclusion: The acoustic cues alone (independent of context) cannot support accurate auditory localization. Applications conclusion: It is not advisable to implement an auditory cueing system that is not guided by vision.

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Brungart, Douglas S. (Douglas Scott) 1972. "Near-field auditory localization." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/10047.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998. Includes bibliographical references (p. 246-253). by Douglas S. Brungart. Ph.D.

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Pålstam, Simon. "Radio Localization with GSM." Thesis, Linköpings universitet, Reglerteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-132395.

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This thesis presents a feasibility study on unobtrusive localization of GSM en- abled cellphones using a Fake Base Station (FBS). An FBS is a radio transceiver that emulates the behaviour of a legitimate GSM Base Station (BS) to fool unal- tered cellphones to connect with it. This feasibility study investigates how an FBS can be utilized to estimate positions of connected cellphones in an area of interest. We present a proof of concept system that consists of a mobile FBS that measures the Time Of Arrival (TOA) and Received Signal Strength (RSS) to a cell- phone. The positions of the mobile FBS are determined with GPS. We employ calibration-free localization algorithms as we assume unknown environments and unknown hardware. Our experiments in an outdoor 180x100 m2 Line-Of- Sight (LOS) environment show that our calibration-free localization algorithms provide an average localization error less than 10 meters, which is sufficient for most applications of interest. In addition, our experiments show that RSS-based localization outperforms TOA-based localization when the average distance be- tween the FBS and cellphone is roughly 50 meters. Our experiments show that TOA-based localization outperforms RSS-based localization when the average dis- tance increases to roughly 75 meters. This research is part of the Smart Savannah project in which a wide range of different surveillance systems are developed to protect rhinos from poachers. We envision that our localization system can be used to detect and localize these poachers in an unobtrusive way. In addition, we envision that our localization sys- tem can be used in Search And Rescue (SAR) operations to estimate the positions of cellphones of missing persons. Detta examensarbete undersöker möjligheten att lokalisera mobiltelefoner med GSM teknologi genom att använda en Falsk Basstation (FBS). En FBS är en radio transceiver som emulerar beteendet hos en legitim GSM basstation för att lura omodifierade mobiltelefoner att ansluta till den. Undersökningen tar reda på hur en FBS kan användas för att estimera positionerna av anslutna mobiltelefoner inom ett målområde. För att undersöka detta har ett Proof-Of-Concept-system ta- gits fram. Systemet består av en mobil FBS som som mäter propageringstid (TOA) och mottagen signalstyrka (RSS). FBS:ens positioner bestäms med GPS. Systemet använder kalibreringsfria algoritmer för lokalisering, då vi antar att miljön och mobiltelefonernas hårdvara är okänd. Tester av systemet har utförts utomhus i ett 180x100 m2 Line-Of-Sight-område. Dessa tester visar att lokaliseringsalgorit- merna ger ett genomsnittligt fel på mindre än 10 meter. Detta anses vara till- räckligt för de flesta tillämpningar av intresse. Utöver detta visar även testerna att RSS-baserad lokalisering ger bättre resultat än TOA-baserad lokalisering när medelavståndet mellan FBS och mobiltelefon är omkring 50 meter. TOA-baserad lokalisering ger däremot ett bättre resultat än RSS-baserad lokalisering när me- delavståndet ökar till omkring 75 meter. Denna undersökning är en del av Smart Savannah projektet som innefattar flera olika övervakningssystem, utvecklade för att skydda noshörningar från tjuv- skyttar. Målet med vårt lokaliseringssystem är att det ska kunna användas för att upptäcka och lokalisera tjuvskyttar utan deras vetskap. Vi tror även att lokalise- ringssystemet kan användas vid eftersökning- och räddnings-operationer för att lokalisera försvunna personers mobiltelefoner. Project Ngulia

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Gao, Xiangjian. "UWB Indoor Localization System." Thesis, The George Washington University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10813674.

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This thesis report has introduced the UWB Indoor Localization System. In the beginning, this thesis report has explained the Indoor Localization System and presented existing techniques (such as Wi-Fi and Bluetooth) to construct an Indoor Localization System. Then, this thesis report has discussed the Ultra Wideband Radio fundamentals to analyze its construction and operating mechanism. During the transmission, the UWB signals will pass an additive white Gaussian noise channel with multipath effects, which cause errors in the values of bits. This thesis report has studied different solutions (such as Modulation Methods and Rake Receiver) to improve the bit error rate in different situations (such as Multipath-free AWGN channel). Next, this thesis report utilizes the UWB Radio fundamentals to show and compare different positioning algorithms (such as TOA and AOA). This thesis report focuses on TOA algorithm. For TOA algorithm, this thesis report has analyzed the IEEE UWB standards and the UWB Radio fundamentals to present and compare different types of receivers. Finally, this thesis report has studied algorithms (such as WLS) to solve non-linear equations to find the position of a mobile station with NLOS effects. In this thesis report, an algorithm (removing excess delay) has been used to mitigate NLOS effects with the simulation based on IEEE 802.15.4a channels. The simulation results are shown in chapter 12, and the average positioning error is around 7 cm.

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Wang, Dong. "Image-based Vehicle Localization." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90795.

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Localization is a crucial topic in navigation, especially in autonomous vehicles navigation. It is usually done by using a global positioning system (GPS) sensor. Even though there have been many studies of vehicle localization in recent years, most of them combine GPS sensor with other sensors to get a more accurate result [1]. In this thesis, we propose a novel image-based vehicle localization by utilizing vision sensor and computer vision techniques to extract vehicle surrounding text landmarks and to locate the vehicle position. Firstly, we explore the feasibility of image-based vehicle localization by using text landmark of a position to locate vehicle position. A text landmark model, a location matching algorithm and a basic localization model are proposed, which allow a vehicle to find the best matching location in the database by cross-checking the text landmarks from query image and reference location images. Secondly, we propose two more robust localization models by applying vehicle moving distance and heading direction data as part of inputs, which significantly improve the localization accuracy. Finally, we simulate an experiment to evaluate our three different localization models and further prove the robustness of our model through experimental results. Master of Science In modern days, global positioning system (GPS) is the major approach to locate positions. However, GPS is not as reliable as we thought. Under some environmental situations, GPS cannot provide continuous navigation information. Besides, GPS signals can be jammed or spoofed by malicious attackers. In this thesis, we aim to explore how to locate the vehicle’s position without using GPS sensor. Here, we propose a novel image-based vehicle localization by utilizing vision sensor and computer vision techniques to extract vehicle surrounding text landmarks and to locate the vehicle position. Various tools and techniques are explored in the process of the research. With the explored result, we propose several localization models and simulate an experiment to prove the robustness of these models.

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Ye, Xin. "Automated Software Defect Localization." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1462374079.

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Brkic, Haris. "FMCW RFID backscatter localization." Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/130682.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, February, 2021 Cataloged from the official PDF of thesis. Includes bibliographical references (pages 47-48). Due to applications in supply chain management, virtual reality, and asset tracking, there has been an increasing interest in accurate localization and motion tracking using radio-frequency identification (RFID) tags. In this thesis, we explore a one-shot radio-frequency identification based localization and motion tracking approach with high accuracy, low latency, and whose cost is much lower than the current state-of-the-art. We propose an implementation that uses frequency-modulated continuous-wave radar for backscatter channel estimation. Overall, our system contributes improvements in the sampling rate and cost of the current state-of-the-art one-shot estimation systems. by Haris Brkic. M. Eng. M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science

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Jones, James Arthur. "Semi-automatic fault localization." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22609.

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Thesis (Ph. D.)--Computing, Georgia Institute of Technology, 2008. Committee Chair: Harrold, Mary Jean; Committee Member: Orso, Alessandro; Committee Member: Pande, Santosh; Committee Member: Reiss, Steven; Committee Member: Rugaber, Spencer.

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Zhang, Melissa. "Localization for Khovanov homologies:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108470.

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Thesis advisor: Julia Elisenda Grigsby Thesis advisor: David Treumann In 2010, Seidel and Smith used their localization framework for Floer homologies to prove a Smith-type rank inequality for the symplectic Khovanov homology of 2-periodic links in the 3-sphere. Hendricks later used similar geometric techniques to prove analogous rank inequalities for the knot Floer homology of 2-periodic links. We use combinatorial and space-level techniques to prove analogous Smith-type inequalities for various flavors of Khovanov homology for periodic links in the 3-sphere of any prime periodicity. First, we prove a graded rank inequality for the annular Khovanov homology of 2-periodic links by showing grading obstructions to longer differentials in a localization spectral sequence. We remark that the same method can be extended to p-periodic links. Second, in joint work with Matthew Stoffregen, we construct a Z/p-equivariant stable homotopy type for odd and even, annular and non-annular Khovanov homologies, using Lawson, Lipshitz, and Sarkar's Burnside functor construction of a Khovanov stable homotopy type. Then, we identify the fixed-point sets and apply a version of the classical Smith inequality to obtain spectral sequences and rank inequalities relating the Khovanov homology of a periodic link with the annular Khovanov homology of the quotient link. As a corollary, we recover a rank inequality for Khovanov homology conjectured by Seidel and Smith's work on localization and symplectic Khovanov homology Thesis (PhD) — Boston College, 2019 Submitted to: Boston College. Graduate School of Arts and Sciences Discipline: Mathematics

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Suwal, Pasang Sherpa. "Passive Acoustic Vessel Localization." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/757.

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This thesis investigates the development of a low-cost passive acoustic system for localizing moving vessels to monitor areas where human activities such as fishing, snorkeling and poaching are restricted. The system uses several off-the-shelf sensors with unsynchronized clocks where the Time Difference of Arrival (TDOA) or time delay is extracted by cross-correlation of the signal between paired sensors. The cross-correlation function uses phase correlation or Phase Transform (PHAT) which whitens the cross-spectrum in order to de-emphasize dominant frequency components. Using the locations of pairs of sensors as foci, hyperbolic equations can be defined using the time delay between them. With three or more sensors, multiple hyperbolic functions can be calculated which intersect at a unique point: the boat's location. It is also found that increasing separation distances between sensors decreased the correlation between the signals. However larger separation distances have better localization capability than with small distances. Experimental results from the Columbia and Willamette Rivers are presented to demonstrate performance.

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FERRARI, SIMONE. "LOCALIZATION TECHNIQUES FOR RENORMING." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/222237.

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Renorming theory involves finding isomorphisms in order to improve the norm of a normed space X. This means to make the geometrical and topological properties of the unit ball of the given normed space as close as possible to those of the unit ball of a Hilbert space. In this work we study different types of geometrical properties. In 1989 Hansell introduced the notion of descriptive topological space: we do not state this definition here, since it is rather technical. Hansell pointed out the role played by the existence of sigma-isolated networks in these spaces. They can replace sigma-discrete topological bases which turn out to be exclusive of metrizable space after the Bing--Nagata--Smirnov theorem. So Hansell proved that a Banach space is descriptive with respect to the weak-topology if, and only if, the norm topology has a sigma-isolated network with respect to the weak-topology. Hansell also proved that if a Banach space has a Kadec norm, then it is descriptive with respect to the weak-topology The main problem in Kadec renorming theory is whether it is possible to prove the converse of the previous theorem: in fact no examples are known of descriptive Banach spaces, with respect to the weak-topology, that do not admit an equivalent Kadec norm. In this work we prove the following theorem: X is a descriptive Banach space with respect to the weak-topology if, and only if, there exists an equivalent weak-lower semicontinuous and weak-Kadec quasinorm q(.), i.e. a quasinorm such that the weak and the norm topologies coincide on the set {x in X s.t. q(x)=1} and a||x||< q(x)<\b||x|| holds for some positive constants a and b. In the second part of this dissertation we state some results on rotund renormings. In this work we will give a characterization of rotund renorming in term of the G$_\delta$-diagonal property: X admits an equivalent, weak-lower semicontinuous and rotund norm if, and only if, X admits an equivalent, weak-lower semicontinuous norm ||.|| such that the set {x in X s.t. ||x||=1} has a G$_\delta$-diagonal with slices. We also prove some transference results. In the third part of the dissertation we begin a study of uniformly rotund renorming theory.

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Savic, Trifun. "Localization in Constrained Environments." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS232.

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Cette thèse se concentre sur la localisation à faible puissance dans des environnements contraints, sans nécessiter d'infrastructure de localisation. Nous considérons deux cas d'utilisation cibles: la localisation de bateaux dans un port de plaisance, et la localisation de robots mobiles dans un environnement intérieur. Nous commençons par évaluer deux systèmes de localisation en temps réel ("Real Time Localition System" en anglais, RTLS) basés sur les radiofréquences (Bluetooth Angle-of-Arrival et Ultra-Wide Band ranging). Leurs principaux inconvénients sont qu'ils nécessitent le déploiement préalable de points d'ancrage, et qu'ils ne sont pas à faible consommation, ce qui les rend peu compatibles avec nos cas d'utilisation cibles. Ce travail contribue à remédier à ces inconvénients en proposant deux nouveaux systèmes: WELOC et Blip. Nous proposons également RRDV, une solution de détection de rencontre de robots pour les systèmes multi-robots. WELOC est un système de localisation basé sur les ultrasons qui réutilise les capteurs de détection de présence des bateaux déjà présents dans la marina. Il comporte un système de programmation qui déclenche l'émetteur-récepteur ultrasonique de chaque capteur de présence à des moments précis. WELOC présente le design d'un appareil mobile alimenté par batterie, capable de communiquer en toute sécurité à la fois par ultrasons et par signaux radio, et conçu à partir de composants disponibles sur le marché. Des essais en conditions réelles dans un port de plaisance dans le sud de la France montrent que l'appareil mobile peut être localisé avec une précision de l'ordre du centimètre, tout en étant à une distance de 10 m des capteurs de présence. Blip est un système d'identification des bateaux dans un port de plaisance, qui ne nécessite qu'une mise à jour logicielle des systèmes de capteurs intelligents existants dans les ports de plaisance. Il utilise les informations fournies par les capteurs de surveillance des bateaux déjà présents (installés dans la cabine d'un bateau) et les combine avec les informations provenant de l'infrastructure fixe des capteurs de présence pour identifier les bateaux sur les emplacements. Lors de nos essais en conditions réelles, le système a fait preuve d'une précision de 100 % dans l'identification des bateaux. Cette thèse propose également RRDV, un système de détection de rencontres entre robots dans un système multi-robots. De nombreux robots sont déjà équipés d'un capteur à ultrasons pour mesurer leur distance à des objets devant eux. RRDV est une mise à jour logicielle pour ces robots, leur permettant d'utiliser ces capteurs à ultrasons pour détecter les rencontres avec d'autres robots. En testant RRDV sur un système multi-robots réel, il détecte correctement 96.7% des fois où deux robots se font face pendant 5 s ou plus. La thèse contribue au domaine de recherche croissant de la localisation et des communications sans-fil à faible consommation, en proposant des solutions innovantes pour des systèmes de localisation précis et à faible consommation dans des environnements contraints. Ces solutions ont des applications non seulement dans l'industrie maritime mais aussi dans les systèmes multi-robots. La thèse démontre l'efficacité des systèmes basés sur les ultrasons et met en évidence le potentiel du matériel ubiquitaire prêt à l'emploi pour le développement de systèmes de localisation This thesis focuses on low-power localization in constrained environments, without the need for localization infrastructure. We consider two target use cases: localizing boats in a marina, and localizing mobile robots in an indoor environment. We start by evaluating two RF-based Real-Time Localization Systems (RTLS), based on Bluetooth Angle-of-Arrival and Ultra-Wide Band ranging. Their main drawbacks are that they require the prior deployment of anchors and are not low power, making them poorly compatible with our target use cases. This work contributes to addressing these drawbacks by proposing two novel systems: WELOC and Blip. We further propose RRDV, a robot encounter detection solution for multi-robot systems. WELOC is an ultrasound-based localization system that re-purposes boat presence detection sensors already deployed in the marina. It features a scheduling scheme that triggers each presence sensors' ultrasonic transceiver at specific times. WELOC introduces a battery-powered mobile device capable of securely communicating with both ultrasound and radio signals, designed entirely from off-the-shelf components. Real-world tests in a real-life marina in the South of France show a mobile device can be localized with cm-level accuracy when it is up to 10 m away from presence sensors. Blip is a system for boat identification in a marina, which only requires a software update to existing smart marina sensor systems. It uses the information from already installed boat monitoring sensors (mounted in a boat's cabin), and combines that with the information from the fixed infrastructure of presence sensors to identify boats on slips. In our real-world tests, the system exhibits 100 % boat identification accuracy. This thesis further proposes RRDV, a system for detecting robot-to-robot encounters in a multi-robot system. Many robots are already equipped with an ultrasound sensor for measuring the distance to objects in front of them. RRDV is a software update to those robots, allowing them to use those ultrasound sensors for detecting encounters with other robots. When testing RRDV on a real-world multi-robot system, it correctly detects 96.7% of the times two robots face one another for 5~s or more. The thesis contributes to the growing research field of localization and low-power wireless by proposing innovative solutions for low-power and accurate localization in constrained environments. While these solutions have countless applications well beyond the ones outlined in this thesis, we chose the use cases of localization of boats in marinas and localization of robots in an indoor environment to remain perfectly focused. The thesis demonstrates the effectiveness of ultrasound-based systems and highlights the potential of ubiquitous off-the-shelf hardware for the development of localization systems

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Szentandrási, István. "Určení pozice kamery v reálném čase pro rozšířenou realitou." Doctoral thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-412551.

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Abstract:

Definované markery tvoří základ určování polohy kamery pro velké množství aplikací s rozšířenou realitou, v případě že jsou přísné požadavky na rychlost a robustnost. Tato práce popisuje účinnou metodu pro určení pózy kamery pomocí Uniformního pole markerů a několik realistických aplikací na bázi popsané metody. Metoda je velice výpočetně levná a poskytuje spolehlivou detekci pro několik výpočetních platforem, včetně běžných chytrých telefonů. Markery jako část zobrazené informace na monitorech jsou použité v této práci pro určení relativní orientaci mezi poskytovatelem obsahu a užívatelským zařízením, sloužícím pro výběr prvků užívatelského rozhraní při interakci a migraci úkolů. Ve filmařském průmyslu poskytuje popsaná metoda pro zjištění polohy kamery jako součást klíčovaní pozadí filmářům živý náhled virtuální scény. Výsledky ukazují, že popsaná metoda pro detekci pole markerů má srovnatelnou úspěšnost a přesnost v porovnání s ostatními metodami na bázi markerů a je několikrát rýchlejší. Aplikace zahrnuté v této práci podle výsledků testů jsou životaschopné - rychlejší a levnější - alternativy k existujícím řešením.

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Dissertations / Theses on the topic 'Localization of the production'

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