Дисертації з теми "Tunnel technology"
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Persson, Tobias. "Wind Tunnel Effects on Truck Aerodynamica and Soiling." Thesis, KTH, Mekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203972.
Повний текст джерелаErlandsson, Olof. "Comparison of Tunnel Convergence Measurement Methods." Thesis, KTH, Fastigheter och byggande, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276439.
Повний текст джерелаVid skapandet av underjordiska hålrum uppträder rörelser i den omgivande marken på grund av att jämvikten upphävs. I tunnelkonstruktioner kallas dessa förskjutningar för tunnelkonvergens. Denna rapport jämför, med avseende både på precision och kostnad, fyra metoder för mätning av tunnelkonvergens. Tre av metoderna baseras på förskjutningsmätningar av optiska mål placerade på regelbundna avstånd längs tunneln. Rapporten presenterar även en metod där en kombination av trådlösa tilt- och distanssensorer används för att monitorera tunnelkonvergens. Den övergripande slutsatsen är att mätprecision och kostnad är väl korrelerade. Viktigt är dock att beakta de olika delarna i den totala kostnaden, som inte bara består av kostnader för arbetskraft och utrustning utan även indirekta kostnader på grund av att annan verksamhet hindras under mätaktiviteter. Mätprecisionen för de olika metoderna uppskattades genom att analysera fördelningen av mätvärden uppmätta i en lab-miljö beskaffad så att inga rörelser förväntades. Från labmätningarna noterades även omfattningen av den arbetsinsats som krävs för att förbereda och utföra mätningarna. Med mätningarna och litteraturstudier som bakgrund diskuteras kriterier att beakta när man väler metod för konvergensmätning. Baserat på dessa kriterier jämförs de fyra metoderna.
Inghels, Pieter. "Wind tunnel blockage corrections forwind turbine measurements." Thesis, KTH, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202632.
Повний текст джерелаLyu, Zhipeng. "Aerodynamic Wind Tunnel in Passenger Car Application." Thesis, KTH, Mekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203971.
Повний текст джерелаDALLA, ROSA LEONARDO. "Structural Health of a concrete tunnel lining under complex in situ loading." Thesis, KTH, Bro- och stålbyggnad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255537.
Повний текст джерелаDomingo, Sabugo María. "Systematic errors in the characterization of rock mass quality for tunnels : a comparative analysis between core and tunnel mapping." Thesis, KTH, Jord- och bergmekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233126.
Повний текст джерелаLi, Guijun, and 李桂君. "Development of recording technology with FePt recording media and magnetic tunnel junction sensors with conetic alloy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899776.
Повний текст джерелаpublished_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy
Taylor, Nigel John. "Adaptive wall technology for two-dimensional wind tunnel testing at high subsonic through to low supersonic speeds." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294622.
Повний текст джерелаSanches, José Afonso. "Understanding the dynamics of a tunnel oven : Use of infrared sensors to measure the temperature of the conveyor belt in a tunnel oven used in bread production." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70363.
Повний текст джерелаUnder kontinuerlig produktion av bröd finns det ibland problem som leder till avbrott i produktionen och kvalitetsproblem. Ett sådant problem är att brödet blir bränt i kontaktytan mellan brödet och transportbandet. För att förstå problemet och veta hur man kvantifierar detta, är det nödvändigt att förstå vad ett termodynamiskt system är och vilka typer av system finns, hur olika typer av värmeöverföring sker, hur man mäter temperatur med hjälp av infraröd strålning och några matematiska metoder som minst kvadratrotsmetoden. Temperaturmätningar planerades och genomfördes. Målet med det första experimentet var att förstå hur transportbandets temperatur varierar under ett huppehåll. Alla andra tester utförades för att undersöka effekterna av de olika lösningarna i bandets temperaturvariation. Enligt resultaten är den bästa lösningen att stänga av ugnen under ett uppehåll och det värsta att spreya bältet med vatten. Att spreya bältet med vatten kan vara en bättre lösning än vad resultaten visar, men det påverkas mycket av andra problem, som avsättningar av kalksten på munstyckena. Många fler lösningar kunde hittas men det var inte möjligt att undersöka alla variabler / lösningar i processen på grund av tillgänglig tid. En långsiktig studie skulle hjälpa till att förstå mycket mer inom regleringen av industriell bakning.
CONTRERAS, MORENO Jorge, and KIBRET DAWIT GHEBREIGZIABHER. "Aeration and risk mitigation for flood discharge tunnel in Zipingpu water conservancy project." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275668.
Повний текст джерелаAbdo, Aslan. "Modeling contingency infiltration scenarios in MODFLOW : Stockholm Bypass and tunnel induced groundwater drawdown." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-244307.
Повний текст джерелаKonstruktioner under mark kan skapa hydrogeologiska utmaningar, såsom sättningsrisk orsakade av grundvattenavsänkning. Ett sätt att effektivisera åtgärdsprocessen är att förbereda för eventuell artificiell grundvatteninfiltration. Vägprojektet Förbifart Stockholm innefattar konstruktioner under mark och riskerar, genom inläckage, att sänka grundvattennivån i omgivningen. Ett potentiellt problemområde är stadsdelen Vinsta, delar av vars är byggd på sättningskänslig lera som kan påverkas av en grundvattenavsänkning. För att kunna motverka en grundvattensänkning i Vinsta har hydrogeologisk modellering utförts för att strategiskt planera artificiell grundvatteninfiltration. Ett tunnelläckage på 220 l/s har simulerats genom en hydrogeologisk steady state-modell i MODFLOW. Fyra olika scenarier för grundvatteninfiltration har konceptualiserats och simulerats för att observera påverkan på grundvattennivån. Den spatialt variabla grundvattennivån i grundmodellen nådde kalibreringsmålen med en genomsnittlig absolutavvikelse på 0,18 m. Modellen för tunnelläckage resulterade i att grundvattennivån i moränakvifären och berget sjönk med 0 – 1,5 resp. 0,5 – 5 m, med större grundvattensänkning närmare tunneln. Scenarierna för infiltration motverkade grundvattensänkningen i olika grad. Närhet tilltunneln, eller platsen för inläckage, samt den hydrauliska konduktiviteten mellan infiltrationen och akvifären visade störst påverkan på resultatet för att motverka grundvattensänkningen. Känslighetsanalysen för parametrarna i modellen visade att berget och dess hydrauliska konduktivitet hade störst påverkan på resultatet. Tillgång till bättre data för berget möjliggör förbättrat modelleringsresultat.
Beder, Sharon Science & Technology Studies (STS) UNSW. "From pipe dreams to tunnel vision : engineering decision-making and Sydney's sewerage system." Awarded by:University of New South Wales. Science and Technology Studies (STS), 1989. http://handle.unsw.edu.au/1959.4/20621.
Повний текст джерелаOliveira, Rone Batista de [UNESP]. "Caracterização funcional de adjuvantes em soluções aquosas." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/101668.
Повний текст джерелаConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
A alta demanda por agrotóxicos pelos sistemas de produção agrícola, aliada ao possível uso inadequado desses produtos, torna a deriva um dos maiores problemas potenciais da agricultura atual, e a escolha correta de adjuvantes pode ser uma das alternativas para minimizar os impactos negativos causados pela deriva nas pulverizações. Este trabalho foi desenvolvido com o objetivo de avaliar o efeito proporcionado por diferentes grupos de adjuvantes nas propriedades físicas e químicas das soluções, no espectro de gotas, bem como no potencial do risco de deriva quantificado em túnel de vento, como forma de auxiliar na escolha correta desses produtos para melhor utilização nas aplicações de agrotóxicos. Foram selecionados 18 adjuvantes comumente utilizados em misturas com agrotóxicos em pulverizações agrícolas, avaliando-se as propriedades físicas e químicas dos mesmos em soluções aquosas (viscosidade, densidade, tensão superficial e condutividade elétrica), o espectro de gotas e o potencial de deriva medido em túnel de vento. O experimento foi composto de 33 tratamentos, tendo a água como testemunha adicional, resultantes da diluição dos adjuvantes em diferentes concentrações, com três repetições. Para os ensaios em túnel de vento e análise de espectro de gotas foi utilizada uma ponta de pulverização XR8003 VK na pressão de 200 kPa, gerando um padrão de gotas médias. A deriva foi coletada no túnel de vento com fluxo de ar na velocidade de 2 m s-1. O corante Azul Brilhante a 0,6% (m v-1) foi utilizado como marcador para todas as soluções pulverizadas visando a quantificação da deriva por espectrofotometria. Os resultados mostraram que a adição de adjuvantes alterou as propriedades físicas e químicas das soluções aquosas em diferentes magnitudes, dependendo da concentração utilizada. Os surfatantes organosilicones...
Due to the high demand for pesticide by the agricultural systems and the possible inadequate use of the products, drift became one of the biggest concerns of the modern agriculture, and the correct use of adjuvants may be one of the possible alternatives to minimize the negative impact of spray operations. This study was developed to evaluate the effect of different adjuvants on physical and chemical properties of spray solutions, droplets spectra as well as drift potential measured in wind tunnel, aiming the correct choice of adjuvants to improve efficiency in pesticide application. For this purpose 18 commercially available agricultural spray adjuvants were selected including products usually mixed up with pesticides in the sprayer tank. The evaluation included physical and chemical properties of spray solutions (viscosity, density, surface tension and electric conductivity), droplets spectra and drift risk potential measured in wind tunnel. The experiment was set up with 33 treatments (solutions) obtained from 18 adjuvants used in different concentrations with 3 replications, including pure water as a standard. For wind tunnel tests and droplet spectra analysis it was used a Teejet XR8003 flat fan nozzles at 200 kPa (medium droplets) and all solutions were mixed up with a food color dye (Blue FDC) at 0,6% m v-1 for spectrophotometry analysis of drift deposits on the wind tunnel. The results showed that the addition of adjuvants changed physical and chemical properties of spray solutions in different magnitudes according to the product concentration. The organosilicon surfactants (Silwet 0.1% e 0.2% and BreakThru 0,1%) had the lowest values for surface tension, while the drift retardant based polymers (Define 0,06% e 0,12%) had the highest values for viscosity and density. There was high correlation between the Volume Median Diameter (VMD) and percentage of droplets smaller... (Completo abstract click electronic access below)
Guttman, Jeremy. "Polymer-based Tunnel Diodes Fabricated using Ultra-thin, ALD Deposited, Interfacial Films." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469125487.
Повний текст джерелаOliveira, Rone Batista de 1977. "Caracterização funcional de adjuvantes em soluções aquosas /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/101668.
Повний текст джерелаBanca: Otavio Jorge Gricoli Abi Saab
Banca: Marco Antonio Gandolfo
Banca: Carlos Gilberto Raetano
Banca: Paulo Roberto Arbex Silva
Resumo: A alta demanda por agrotóxicos pelos sistemas de produção agrícola, aliada ao possível uso inadequado desses produtos, torna a deriva um dos maiores problemas potenciais da agricultura atual, e a escolha correta de adjuvantes pode ser uma das alternativas para minimizar os impactos negativos causados pela deriva nas pulverizações. Este trabalho foi desenvolvido com o objetivo de avaliar o efeito proporcionado por diferentes grupos de adjuvantes nas propriedades físicas e químicas das soluções, no espectro de gotas, bem como no potencial do risco de deriva quantificado em túnel de vento, como forma de auxiliar na escolha correta desses produtos para melhor utilização nas aplicações de agrotóxicos. Foram selecionados 18 adjuvantes comumente utilizados em misturas com agrotóxicos em pulverizações agrícolas, avaliando-se as propriedades físicas e químicas dos mesmos em soluções aquosas (viscosidade, densidade, tensão superficial e condutividade elétrica), o espectro de gotas e o potencial de deriva medido em túnel de vento. O experimento foi composto de 33 tratamentos, tendo a água como testemunha adicional, resultantes da diluição dos adjuvantes em diferentes concentrações, com três repetições. Para os ensaios em túnel de vento e análise de espectro de gotas foi utilizada uma ponta de pulverização XR8003 VK na pressão de 200 kPa, gerando um padrão de gotas médias. A deriva foi coletada no túnel de vento com fluxo de ar na velocidade de 2 m s-1. O corante Azul Brilhante a 0,6% (m v-1) foi utilizado como marcador para todas as soluções pulverizadas visando a quantificação da deriva por espectrofotometria. Os resultados mostraram que a adição de adjuvantes alterou as propriedades físicas e químicas das soluções aquosas em diferentes magnitudes, dependendo da concentração utilizada. Os surfatantes organosilicones... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Due to the high demand for pesticide by the agricultural systems and the possible inadequate use of the products, drift became one of the biggest concerns of the modern agriculture, and the correct use of adjuvants may be one of the possible alternatives to minimize the negative impact of spray operations. This study was developed to evaluate the effect of different adjuvants on physical and chemical properties of spray solutions, droplets spectra as well as drift potential measured in wind tunnel, aiming the correct choice of adjuvants to improve efficiency in pesticide application. For this purpose 18 commercially available agricultural spray adjuvants were selected including products usually mixed up with pesticides in the sprayer tank. The evaluation included physical and chemical properties of spray solutions (viscosity, density, surface tension and electric conductivity), droplets spectra and drift risk potential measured in wind tunnel. The experiment was set up with 33 treatments (solutions) obtained from 18 adjuvants used in different concentrations with 3 replications, including pure water as a standard. For wind tunnel tests and droplet spectra analysis it was used a Teejet XR8003 flat fan nozzles at 200 kPa (medium droplets) and all solutions were mixed up with a food color dye (Blue FDC) at 0,6% m v-1 for spectrophotometry analysis of drift deposits on the wind tunnel. The results showed that the addition of adjuvants changed physical and chemical properties of spray solutions in different magnitudes according to the product concentration. The organosilicon surfactants (Silwet 0.1% e 0.2% and BreakThru 0,1%) had the lowest values for surface tension, while the drift retardant based polymers (Define 0,06% e 0,12%) had the highest values for viscosity and density. There was high correlation between the Volume Median Diameter (VMD) and percentage of droplets smaller... (Completo abstract click electronic access below)
Doutor
Lovén, Sara. "Ersättning för järnvägstunnlar : En jämförelse mellan servitut och 3D - fastighet." Thesis, KTH, Fastigheter och byggande, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211438.
Повний текст джерелаThe population of Stockholm has increased over the last few years and will continue to increase in the near future. In order to facilitate a continuing development of Stockholm the Metro will expand. The Metro expansion will run mostly underground and requires access to underground space. There are two different options to receive access either through three-dimensional property or easements. Depending on which method is used there are different consequences for the railway owner and the property owners. The purpose of this thesis is to describe the reasons for using either ownership or easements and the consequences of the choice, the effect an underground tunnel has on the property value, and if there is a difference in the effect on property value depending on which method is utilized. A qualitative study has been employed to answer the research questions. The research consisted of case studies and the interviews. Three cases have been studied; the cases are railway tunnels in Stockholm, Gothenburg and Malmö. Interviews have been held with the cadastral authorities in Stockholm, the Transportation administration, and a property evaluator specializing in infrastructure. The research concludes ownership is a more suitable for railways and makes the maintaining easier. However it can be considered more intrusive and thus the compensation received should be a little higher. The compensation values that Norell came up with are appropriate for the seized space.
Moses, Kenneth C. "A Durable Terrestrial Drive Train for a Small Air Vehicle." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1270233578.
Повний текст джерелаDepartment of EMC - Mechanical Engineering Title from PDF (viewed on 2010-05-25) Includes abstract Includes bibliographical references and appendices Available online via the OhioLINK ETD Center
Niel, Stéphan. "Optimisation du système émetteur-base de transistors bipolaires haute performance en technologie 0,35 [mu]m, simple-polysiliciium, quasi-auto-alignée." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10186.
Повний текст джерелаEl, zain Nadia. "An experimental study of the validity of the round panel test method for shotcrete." Thesis, KTH, Betongbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230981.
Повний текст джерелаSprutbetong användes första gången år 1914 och har under det gångna århundradet blivit allt viktigare för att stabilisera utsprängda tunnelsektioner. Trots att tekniken utvecklas finns det svårigheter med att exempelvis utforma bultförankrade tunnelbeklädnader av sprutbetong. En beprövad och etablerad metod att konstruera sprutbetongbeklädnad existerar inte idag. Istället används erfarenhetsåterföring från tidigare projekt och/eller experimentella försök. En testmetod som används idag för att återskapa beteendet hos sprutbetong är balkförsök. Tidigare studier har däremot visat att resultaten från försöken oftast har stor spridning vilket kan bero på att brottytorna är små areor där fibrerna kan vara ojämnt fördelade vilket påverkar resultaten. År 1998 föreslogs en alternativ metod för att fastställa de mekaniska egenskaperna hos sprutbetong, baserat på användning av runda plattor. År 2004 blev denna metod en del av the American Society for Testing and Materials, ASTM, standarder. Metoden har potential att bli en viktigt och tillförlitligt testmetod som mer realistiskt efterliknar beteendet hos fiberarmerad sprutbetong jämfört med balkprovning. En experimentell försöksserie har genomförts hos Vattenfall i Älvkarleby, för att jämföra de två metoderna med avseende på mätosäkerhet. Försöksserien är på totalt 30 prover, där fem olika betongrecept använts. Cementmängden och fiberhalten varierade mellan de olika recepten. De runda plattorna är utförda enligt ASTM C-1550 och balkarna enligt SS-EN14488-3. Resultaten från försöken har redovisats och utvärderats, och en mätosäkerhersanalys presenteras för metoden ASTM C-1550. Korrelationen mellan resultaten från de två metoderna är beräknad och varianskoefficienten presenteras. För- och nackdelar mellan båda testmetoderna diskuteras.
Trompille, Virginie. "Etude expérimentale et théorique du comportement d'un tunnel renforcé par boulonnage frontal." Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0044/these.pdf.
Повний текст джерелаThe reinforcement of tunnels face using longitudinal fibre glass bolts allows the excavation in weak ground. Although this technique is employed more and more, the real effect of the bolts on the increase of stability and the reduction of the movements behind the tunnel face remains still difficult to evaluate. This thesis work proposes to tackle this problem using two types of approaches. First, a theoretical approach by homogenisation of the reinforced medium leading to useful design tools. Then, an experimental approach including, on the one hand in situ data obtained thanks to the instrumentation of a real tunnel and on the other hand, experiments using a reduced-scale model in laboratory to complete but also to provide data under ideal conditions easier for the interpretation
Trompille, Virginie Wong Henry Kwai-Kwan. "Etude expérimentale et théorique du comportement d'un tunnel renforcé par boulonnage frontal." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=trompille.
Повний текст джерелаDounia, Salim. "Optimisation des performances de capteurs de champ à base de jonctions tunnel magnétiques." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALY025.
Повний текст джерелаMagnetic field sensors based on magnetic tunnel junctions are a promising solution in the development of miniature low power devices. The performances of these sensors are highly dependent on the free layer dimensions and thus it’s magnetic state (macrospin/vortex). Crocus Technology, the industrial stakeholder of this thesis, has been designing some of the smallest TMR sensors for several years. Sensors at macrospin state, despite their good sensitivity, have a high noise level strongly degrading their ability to detect low magnetic fields, and an undesired hysteresis. This thesis takes place in this context of improving detectivity and reducing hysteresis. It focuses on the study of TMR sensors with a free layer at vortex state to take advantage of the low noise and reduced hysteresis expected for this magnetic state. The objective is to improve the performances of these TMR sensors by studying different dot shapes and magnetic stacks via micromagnetic simulations and electrical characterizations. The first results presented in this thesis concern the improvement of sensitivity without degradation of linearity for sensors based on non-circular dots; experiments confirm the validity of the solutions obtained by micromagnetic simulations. The second part of this work concerns the measure and study of noise and detectivity for different dot shapes and magnetic stacks. We show that noise and sensitivity are correlated and that noise is linked to grains at the interface with MgO tunnel barrier. In particular, we demonstrate that non-magnetic inserts improve detectivity. The third part of this work deals with hysteresis reduction in these sensors. Using micromagnetic simulations, we show that hysteresis can be controlled thanks to a cut at the dot edge. We also note that elliptical dots with a flat cut improve the measuring range. A residual hysteresis is however generated by the cut. An analytical model is then developed in order to confirm simulations results and to determine dots geometry leading to hysteresis suppression. Finally, the last part of this work deals with the suppression of the residual hysteresis via the magnetostatic interaction between neighbouring dots independently of their shape. An analytical model is developed but needs further improvements to confirm simulation results
Barros, Oscar de. "Caractérisation électrique des défauts induits lors de l'intégration de la base d'un transistor bipolaire a hétérojonction SIGe en technologie BICMOS." Lyon, INSA, 1997. http://www.theses.fr/1997ISAL0106.
Повний текст джерелаEpitaxial growth improvements have allowed the elaboration of high quality SiGe strained layers on Si substrate and their application in heterojunction bipolar transistors, leading silicon based devices to high frequency performances. Nevertheless, the integration of the. SiGe alloy in an industrial process requires minimum process modification as well as a high final quality of epitaxial layers. This is the context of the SiGe HBTs integration into a BiCMOS process developed at the CNET Meylan. In this thesis work, we present a study of the quality of the emitter-base system of SiGe HBTs, by means of electrical measurements such as deep level transient spectroscopy and static currents. Experimental results on single polysilicon self-aligned transistors point out the presence of defects in the active zone of the devices, located at the emitter-base junction periphery along Si02 spacers. The apparent activation energy is 0. 6 eV, making these deep levels very active recombination centers. These defects have been shown to originate from the reactive ion etching of the polysilicon emitter, leading to the conclusion that the epitaxial layers do not suffer relaxation during the process. This result is a contribution to the choice of a quasi-self-aligned structure for further development, where the active zone is far from etch-induced damages. First results concerning the quasi self-aligned transistors have evidenced the presence of many deep levels in the SiGe base bandgap, corresponding to defects at the Si/SiGe interface and in the SiGe base, which dramatically degrade the device performances
Di, Pendina Grégory. "Conception innovante et développement d'outils de conception d'ASIC pour Technologie Hybride CMOS / Magnétique." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT035/document.
Повний текст джерелаFor several years many non-volatile technologies have been appearing and taking place mainly in the memory world, aiming at replacing all kind of memory. Their assets let thinking that some of them, specially the MRAM technologies, could improve the integrated circuit performances, using their so called magnetic components in the logic, in particular the magnetic tunnel junctions. To evaluate the potential benefits, it is necessary to be able to design such a circuit. That is the reason why we are proposing a full design kit for both full custom and digital designs, allowing all the design steps. Part of this kit has been used by partners in research project to design demonstrators. We also propose in this kit an innovative ultra-compact magnetic latch, for which 2 patents have been deposited, integrated in a flip-flop. Finally, we present the integration of magnetic components for two applications, security and low power, as well as a case study which shows that the static consumption reduction can be huge
Unlu, Mehmet. "Novel Impedance Tuner, Phase Shifter, And Vector Modulators Using Rf Mems Technology." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/4/12610502/index.pdf.
Повний текст джерелаKilburn, Lilia Maud. "Answering machine, auto-tune, spectrograph : queer vocality through sonic technology." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106760.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 113-121).
In academic and activist contexts, "voice" has long served as shorthand for inclusion, empowerment, and the like, occasioning bromides about having or not having a voice, giving voice to the voiceless, breaking the silence, and speaking truth to power. Such metaphysically inflected phrasings often serve to reinforce a binary between sound and silence at the expense of attending to other vocal modulations. This thesis first assembles calls by queer and feminist scholars for such nuanced portrayals of vocality; then, so as to answer those calls, it stages scenes of listening. I examine vocality through technology: by looking at how vocality is structured by enclosing technologies, which in turn structure relations and the reverse. More specifically, my thesis traces the ways in which vocality travels in the world by attending to three particular technologies through which the voice is filtered: the answering machine, Auto-Tune pitch correction software, and the sound spectrograph. This approach enables me to probe the distinct claims that specific sound technologies allow us to hold on one another-claims about mourning and loss, about calling and the promise of response, about the identification of individuals (or oneself) via the voice. Though my investigations span various archives, I center them on two characters: the performer Cher and her son Chaz, who is transgender. I do so to consider the ways in which a sonically inflected media theory can inform queer theory and vice versa, and to consider the particular relational dilemmas made incumbent upon subjects whose vocal trajectories are discontinuous, depart from normative pitch, and/or deemed an invitation to violence.
by Lilia Maud Kilburn.
S.M. in Comparative Media Studies
Couturaud, Olivier. "Effets tunnels dans des nano-capteurs de Hall." Montpellier 2, 2008. http://www.theses.fr/2008MON20122.
Повний текст джерелаAs part of this thesis, we studied a family of Hall effect sensors , composed of submicrometers Hall cross and microgradiometers made from optimized quantum wells. The first one left this thesis is dedicated to manufacture and to characterization of sensors. They will study everything of manners the resistance of contacts and the depletion length restricting the functioning of sensors In second part, we study the tunnel effect of electrons between the edges of the sample. In the presence of a quantizing magnetic field, at the transition between two quantized Hall plateaus, a succession of sharp peaks is detected in the Hall signal RH and in the longitudinal resistance RL. The peaks appearing on the high-í side of the RL transition appear to be different from the peaks appearing on the low-í side. They mainly differ by their temperature dependence. On the high-í side of the RL transition, the temperature evolution of the peaks is typical for resonant tunneling through a single state in one of the antidots that are progressively formed when the initially occupied LL is emptied. On the low í of the transition, by contrast, the temperature dependence is different. This may be related to the asymmetry of the density of states
Chahboun, Adil. "Etude d'électrons balistiques en microscopie à effet tunnel et autres applications en microscopie à champ proche." Toulouse 3, 1992. http://www.theses.fr/1992TOU30212.
Повний текст джерелаChinien, Lomadeven Viken. "Design of multiple tuned mass dampers for mitigation of wind induced vibrations." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/11536.
Повний текст джерелаGrigoriou, Eleni. "Graded organisation of fibronectin to tune cell behaviour." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8523/.
Повний текст джерелаSkiribou, Camelia. "Canal de propagation 5G et mécanisme de contrôle d'intégrité : application à la localisation sûre des rames dans un tunnel." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS343.
Повний текст джерелаSystem level simulations are crucial in the development phase of any emerging wireless technology. It allows to identify the key factors that affect the transmission quality and to define the network limits. The used simulators must then be based on accurate and realistic channel models to better predict the system performances. In this context, several researches had been interested to the development of new models that take into account the emerging propagation scenarios introduced by the fifth generation of mobile communications (5G) that will be commercialized by 2020. In order to optimize the spectral and energetic resources use, the mobile terminals of this next generation should be constantly aware of their environment. This relies on the implementation of a location system, especially in constrained environments where satellite positioning systems are not available. In the field of transport, a rather recurrent example of these scenarios is that of tunnels. Although they are indoor environments, this type of environment is characterized by the phenomenon of wave guiding due to its geometric structure and the properties of the materials of its walls. Thus, an extension of the propagation models developed for the 5G systems is then necessary, in order to take into account this use case. We propose in this thesis a hybrid approach to reproduce the effect of the channel in a localization system. First, we calculate the propagation parameters by a ray-tracing simulator. It accurately describes the behavior of the radio waves inside the tunnel; nevertheless, it is expensive in terms of computing time. Then we analyze the obtained deterministic data to identify their statistical laws, and we store both of them in a database to stochastically generate the channel coefficients needed for our ranging system, namely the amplitude and the delay relative to each path. The impulse response of the channel will finally be used to estimate the distance between the two transmission antennas. Depending on the propagation conditions as well as the position of the receiver, three sources of error can compromise the accuracy of this distance. For a ranging system based on the time metric, they are related to the bandwidth, the detection threshold, and the obstruction of the direct path. The implementation of an integrity control mechanism seems to be a promising solution to improve the performance of our system. It then consists of identifying the outliers that do not meet the constraints imposed by the application, then excluding or correcting them according to the strategy adopted by the receiver. In this context, we propose to exploit the spatial diversity of a SIMO (Single Input Multiple Output) system with two reception antennas in order to identify the propagation conditions of the channel. The first step of our approach aims to increase the temporal resolution of the two impulse responses of the system. Being sparse, they are reconstructed in the frequency domain over a very wide band using a compressed sensing technique. Then we classify them according to a temporal criterion, which represents the time difference of propagation of the signal in each channel, and we obtain it by the inter-correlation of reconstructed impulse responses. The proposed approach not only improves the reliability of the ranging information in the tunnel, but also reduces the error related to the limited bandwidth of the system and the obstruction of the direct path. An experimental implementation of the ranging system based on OFDM signals gives rise to distance estimation errors at least six times lower than those reported by the classical approach, or even to those issued from other identification techniques based on statistical tests. This algorithm and the hybrid model of the channel are then the two major contributions of this thesis work [...]
Giones, Valls Ferran. "Turn On, Tune In, Drop Out? Exploring the Venture Emergence in Technology-based Firms." Doctoral thesis, Universitat Ramon Llull, 2016. http://hdl.handle.net/10803/361123.
Повний текст джерелаLos emprendedores toman decisiones como la de empezar o no su idea de negocio, adaptarse o no a las necesidades del mercado, y desafortunadamente la de continuar o dejar su proyecto. A pesar de que la constante progresión tecnológica abren oportunidades para generar ideas de negocio a partir de las innovaciones tecnológicas; sólo algunos de ellos y ellas logran cumplir estas expectativas. Las investigaciones previas en emprendimiento han observado como los recursos pueden ayudar a entender la evolución de las empresas de nueva creación. No obstante, cuando se plantea el estudio del emprendimiento de base tecnológica nos encontramos con dificultades para poder explicar las diferencias de resultados si nos limitamos a observar las combinaciones iniciales de recursos. Esta investigación propone introducir perspectivas teóricas que nos permitan identificar factores y su influencia para entender como surgen las organizaciones de base tecnológica. Utilizamos un método mixto, combinando un estudio cualitativo y un cuantitativo. En primer lugar exploramos factores y acciones que influyen en el proceso de emprendimiento tecnológico. A continuación ampliamos el marco teórico inicial para dar soporte a los aspectos identificados en el trabajo cualitativo, y formulamos las hipótesis de investigación. Usamos un set de datos longitudinales para testeas estas hipótesis. Finalmente, se concluyen el documento con una discusión de los resultados obtenidos. La teoría de señales nos permite entender como los recursos tecnológicos pueden tener una función como símbolo de calidad. Observamos que estos recursos deben ser transformados para generar valor para los potenciales clientes. Utilizando la perspectiva teórica de marketing y de capital humano detallamos como la experiencia y la intensidad de las acciones de creación de mercado tienen una influencia positiva en el proceso de creación de las empresas. Esta investigación contribuye al conocimiento actual sobre el desarrollo de empresas de nueva creación de base tecnológica. Se sugiere que la orientación de las acciones del emprendedor, en concreto la activación de orientación a mercado, influyen en desarrollo de estas organizaciones. Los resultados tienen implicaciones prácticas para emprendedores, inversores y agentes implicados en el desarrollo de emprendimiento tecnológico; se propone que más allá de fijarse en las combinaciones iniciales de recursos, debemos dedicar más atención a las capacidades de transformar estos recursos en propuestas de valor y su orientación a mercado.
Despite the remnant promises that sustained technological progress offers to entrepreneurs eager to introduce disruptive technological innovations, we observe that only few of them live up to the expectations. In fact, there is a limited understanding on the factors underlying the transformation of promising technologies into viable organizations, and how they influence the decisions to turn on, tune in with the market, and drop-out or continue with their organizing efforts. Prior entrepreneurship research relying on the resource-based view finds difficulties to explain the technology-based firms' performance. We propose to complement the current understanding with additional perspectives that could help to identify factors that provide further insights on the emergence of new technology-based firms. We adopt a mixed-method approach to combine an exploratory qualitative field work with a quantitative research approach. First, we gather insights on the factors and actions that are seen to be influencing the technology entrepreneurship process, from the initial opportunity to the creation of a stable business. Then, we extend our initial theoretical framework on the technology entrepreneurship process to support the qualitative findings and build propositions; these are tested as hypotheses on a larger sample of technology-based firms. Finally, we combine the findings from the qualitative field work with the findings from the hypotheses test. Using the signaling theory we explain how some resources value goes beyond its direct impact on firm’s performance, suggesting that they are also used for their symbolic value. We observe that technological assets need to be transformed in order to generate value for the potential customers of the new venture. Marketing and human capital theory insights provide an explanation on how experience and market presence positively influence the venture emergence of new technology-based firms. We contribute to the current understanding of new technology-based firms with the introduction of human capital, marketing and technology commercialization theory. Describing how the orientation of entrepreneur's actions and the early development of market capacities influence on the venture emergence of this type of firms. The results also have implications for entrepreneurs, investors in technology startups, and stakeholders in technology entrepreneurship; as they suggest that further attention should be given to the market actions of the entrepreneurs, regardless of their initial combinations of resources.
Di, pendina Gregory. "Conception innovante et développement d'outils de conception d'ASIC pour Technologie Hybride CMOS / Magnétique." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00750121.
Повний текст джерелаMaasoglu, Goncagül. "Kan den fysiska miljön underlätta brott? : Lärdomar från en systematisk analys i Bergsjön, Rinkeby och Vivalla." Thesis, KTH, Samhällsplanering och miljö, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232993.
Повний текст джерелаThere is many jobs today in Sweden for crime prevention and these happen often through social efforts, but there is way too few of these for the physical environment that actually affects us more than we think they do. The purpose with this study is to make a systematical analysis of the physical environment in three deprives areas and examine if these environments can create crime opportunities. The chosen places are Bergsjön, Rinkeby and Vivalla with current problematic and high crime concentration (Polisen, 2017). Fact and theories such as the Routine Activity Theory, CPTED and Jane Jacobs’s urban ideas is treated in the study’s background. Similarities between the areas physical environment is compiled through map comparisons, place analysis and interviews. The methods result showed that the traffic separation created many dark tunnels into the areas, which caused unattractive and insecure entries. The buildings in the areas were also not varied and there could be a several of similar houses next to each other or over the whole field. It can be easier for a criminal to commit crimes in a simple surrounding without details, because it is fewer things to keep track of and it becomes much easier to commit the crime when people doesn’t look around themselves. Another similarity was the street structures, for example the three areas had blind alleys that didn't interweave the streets with each other. This contributed to segregated areas and difficulties for the police to arrive and perform their efforts effectively. Even the buildings placement to the street affected whether they had a natural surveillance that could prevent crime. This concluded that the physical environment in these three deprived areas can affect the emergence of crime.
Prasetiadi, Ananto Eka [Verfasser], Rolf [Akademischer Betreuer] Jakoby, and Michael [Akademischer Betreuer] Höft. "Tunable Substrate Integrated Waveguide Bandpass Filter and Amplitude Tuner Based on Microwave Liquid Crystal Technology / Ananto Eka Prasetiadi ; Rolf Jakoby, Michael Höft." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/114058670X/34.
Повний текст джерелаJansson, Anna. "Ljuset i tunneln : En studie i hur ljus och färg kan utformas, i syfte att erbjuda en tryggare känsla för fotgängare i befintliga gångtunnlar." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36306.
Повний текст джерелаMany people in today’s society feel unsafe while walking in specific parts of a city. This may be the result in lack of lightning in these spaces, and it’s possible that these spaces don’t communicate a safe passage for the users. This study aims to investigate how light and colour can be configured to communicate and conjure a safe passage through the experienced unsafe places. One of these unsafe places are pedestrian tunnels, who might not be used as thought, due to the anxiety of usage. Even thou these tunnels actually exist to bring safety to pedestrians in the city. This thesis has implemented through different methods such as user survey, interview with expertise, and spatial observation, in order to achieve new insight into this research. An already existing tunnel in Eskilstuna partly known for its lack of lightness, will serve as my case study for this Bachelor thesis in Information design, emphasis in Spatial design.
Persson, Daniel. "Visualisering av amyloider och patogenes i skadad näthinna." Thesis, Högskolan Kristianstad, Sektionen för lärande och miljö, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-17218.
Повний текст джерелаDeposition of amyloid beta (Aβ) in the extracellular environment are associated to some severe diseases, like Alzheimer’s disease and age-related macular degeneration (AMD). Amyloids are characterized by insolubility, toxicity towards neuron and are there-for damaging to tissues. AMD is the primary cause of blindness and irreversible loss of central vision through manifestation of Aβ in the macula. In AMD, Aβ drives an inflammatory action that degenerates the retinal pigment epithelium and cause atrophy of photoreceptors. Today ~150 million people live with AMD where many find difficulties performing everyday tasks due to loss of sharp vision. Congo red is a gold standard for visualizing amyloids in vitro and the pathogenesis caused by amyloids can be analyzed by immunofluorescence and immunohistochemistry. The purpose of this study was to show the presence of amyloids relating to cell death in pig retina, show the pathogenesis caused by amyloids by using immunofluorescence and immunohistochemistry, and investigate whether there is correlation between amyloids and cell death. The result showed that amyloids were present in the retina and caused cell death and gathering of aggresomes. Amyloids and the caused pathology could be visualized in the outer layer of the retina.
Palun, Lionel. "Etude prospective sur les dispositifs silicium à blocage de Coulomb dans une perspective d'application à la micro-électronique." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10019.
Повний текст джерелаBrorson, Erik. "Classifying Hate Speech using Fine-tuned Language Models." Thesis, Uppsala universitet, Statistiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-352637.
Повний текст джерелаFortea, Richard, and Nils Vennberg. "Ljudbilders Mättnad i Film : Hur tjocka och tunna ljudbilder byggs upp." Thesis, Blekinge Tekniska Högskola, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20403.
Повний текст джерелаBarnhart, Samuel. "Design and Development of a Coherent Detection Rayleigh Doppler Lidar System for Use as an Alternative Velocimetry Technique in Wind Tunnels." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1595276402371536.
Повний текст джерелаTomasoni, Angela Maria. "Modèles et méthodes d'évaluation et de gestion des risques appliqués aux systèmes de transport de marchandises dangereuses (TMD), reposant sur les nouvelles technologies de l'information et de la communication (NTIC)." Phd thesis, École Nationale Supérieure des Mines de Paris, 2010. http://pastel.archives-ouvertes.fr/pastel-00006223.
Повний текст джерелаTunger, Antje [Verfasser], Marc [Akademischer Betreuer] [Gutachter] Schmitz, and Michael [Gutachter] Göttfert. "Generierung hoch-avider, WT1126-spezifischer CD8+ zytotoxischer T-Zell-Klone mit anti-leukämischer Aktivität mittels Streptamer-Technologie / Antje Tunger ; Gutachter: Marc Schmitz, Michael Göttfert ; Betreuer: Marc Schmitz." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1123932182/34.
Повний текст джерелаSoulier, Antoine. "Caractérisation du fonctionnement aérodynamique du e-Penon, capteur de décollement pour les pales d'éoliennes." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0005.
Повний текст джерелаWind turbine inflow complexity can cause flow separation and stall on wind turbine blades. These phenomena are responsible of aerodynamic load fluctuations and thus a faster aging of the blades. Today there is no sensor able to detect locally the flow separation on blades of productive wind turbines. The e-Penon was developped to fill this lack. The aim of this thesis PHD was to characterise the impact of the presence of the e-Penon on blade aerodynamics and to assess the performance of the sensor about its capacity to measure flow separation, stall and reattachment. For this work, wind tunnel measurements were performed in two different wind tunnels. The NSA wind tunnel at CSTB with a 2D blade profile and a full scale e-Penon was used to perform measurments with static angles of attack. The aerodynamic wind tunnel of the LHEEA was used with the same 2D profile and a e-Penon, both at reduced scale, with angle of attack oscillations. It was shown that the presence of the e-Penon only impacts the wall pressure fluctuations around the sensor and the near wake spectral signature, while the global and mean aerodynamic forces are not significantly modified. It was also shown that an adequate flexibility and length of the e-Penon strip makes it able to detect both the flow separation at the trailing edge and the stall when positioned near the trailing edge. It was finally demonstrated that the strip of a downscaled e-Penon is able to detect stall, flow separation and reattachment instants when placed at the trailing edge of an oscillating airfoil at a reduced scale
Bossuet, Alice. "Intégration sur silicium de solutions complètes de caractérisation en puissance de transistor HBT en technologie BiCMOS 55 nm à des fréquences au-delà de 130 GHz." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10038/document.
Повний текст джерелаThe evolution of silicon technologies now makes possible the development of many applications in the millimeter areas such as high speed communication systems. The evolution of these silicon technologies is characterized by the increase of the transistor performances with the frequency that requires the development of efficient radiofrequency measurement tools for accurate modeling of active components or the optimization of integrated circuits. In this framework, the load-pull characterization is an essential method to model the behavior of transistors in nonlinear region. In the G Band, the classical measurement environment typically available has not the required performance for this kind of characterization due to the losses in the accesses to the device under test. The aim of this thesis is to lift this lock by offering, in the STMicroelectronics BiCMOS 55 nm technology, a fully integrated load-pull characterization bench on silicon in order to be as close as possible to the device to characterize. The thesis manuscript is divided into four chapters. The first chapter presents the state of the art of the currently available instrumentation for power characterization at millimeter wave frequencies band and their limitations, which leads to the G band characterization bench specifications. The second chapter details the design and characterization of the mains blocks constituting the integrated bench: the tuner and the mmw power source. The third chapter present the design and characterization of the power detector. Finally, the fourth chapter presents the complete bench and its application with the G band load-pull characterization of a transistor bipolar device
Alami, Jones. "Plasma Characterization & Thin Film Growth and Analysis in Highly Ionized Magnetron Sputtering." Doctoral thesis, Linköping : Dept. of Physics and Measurement Technology, Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4147.
Повний текст джерелаAmestoy, Antoine. "Synthèse de nanohélices hybrides par auto-assemblage de type "bottom up" pour la fabrication de capteurs de déformation flexibles." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0041.
Повний текст джерелаFlexible and biocompatible strain sensors based on nanoparticle (NPs) assemblies show great potential for various future applications, such as electronic skin, flexible touch screens, and robotics. The high sensitivity of such strain sensing devices is due to the exponential dependence of the tunnel resistance on the distance between adjacent NPs, which is altered by the strain. However, the sensitivity, reproducibility and stability of these sensors are affected by variations in thickness, morphology and density of the films during manufacture or during their application. The objective of this work is to develop strain sensors based on assemblies of silica nanohelices covered with conductive metallic NPs or semiconducting metal oxide NPs to overcome these critical aspects. In the first part, gold NPs are synthesized and functionalized with different compositions of insulating ligands and are further grafted on the surface of the nanohelices with a covalent bond. In the second part, transparent semiconducting NPs of antimony-doped tin oxide are synthesized, functionalized and assembled on the surface of nanohelices by electrostatic or covalent interactions. Finally, the various assemblies obtained are deposited by dielectrophoresis between interdigitated electrodes on a flexible substrate. The flexibility, sensitivity and stability properties of the sensors are then characterized by electromechanical measurements coupled with scanning electron microscopy observations
Emslie, Martin. "Station-nearness Principles in the Copenhagen Region and Scania, Integrating Urban Functions with Public Transit." Thesis, Blekinge Tekniska Högskola, Sektionen för teknokultur, humaniora och samhällsbyggnad, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1264.
Повний текст джерелаKaroumi, Raid. "Response of cable-stayed and suspension bridges to moving vehicles : Analysis methods and practical modeling techniques." Doctoral thesis, KTH, Byggkonstruktion, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2764.
Повний текст джерелаQC 20100511
Bossens, Frédéric. "Amortissement actif des structures câblées: de la théorie à l'implémentation." Doctoral thesis, Universite Libre de Bruxelles, 2001. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211598.
Повний текст джерелаDoctorat en sciences appliquées
info:eu-repo/semantics/nonPublished