Dissertationen zum Thema „Virtual analog“
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Eriksson, Oskar. „Implementing virtual analog synthesizers with the Web Audio API : An evaluation of the Web Audio API“. Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27099.
Der volle Inhalt der QuelleDamkjer, Kristian Linn. „Architecting RUBE worlds a methodology for creating virtual analog devices as metaphorical representations of formal systems /“. [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000670.
Der volle Inhalt der QuelleGurary, Jonathan Gurary. „Improving the Security of Mobile Devices Through Multi-Dimensional and Analog Authentication“. Cleveland State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1521564381685222.
Der volle Inhalt der QuelleHardt, Oliver. „What Determines Spatial Strategy Choice In Human Spatial Learning In A Computer-Analog Of The Morris Water Maze?“ Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1065%5F1%5Fm.pdf&type=application/pdf.
Der volle Inhalt der QuelleMartin, Johan. „Effekten av virtuell rullbandsdistorsion i musik : Hur upplever lyssnaren digital rullbansemulering?“ Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-14062.
Der volle Inhalt der QuelleNajnudel, Judy. „Power-Balanced Modeling of Nonlinear Electronic Components and Circuits for Audio Effects“. Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS223.
Der volle Inhalt der QuelleThis thesis is concerned with the modeling of nonlinear components and circuits for simulations in audio applications. Our goal is to propose models that are sufficiently sophisticated for simulations to sound realistic, but that remain simple enough for real time to be attainable. To this end, we explore two approaches, both based on a port-Hamiltonian systems formulation. Indeed, this formulation structurally guarantees power balance and passivity. Combined with ad hoc numerical methods, this ensures the numerical stability of simulations. The first approach is comparable to "white box" modeling. It assumes that the circuit topology is known, and focuses on the modeling of specific components found in vintage audio circuits, namely ferromagnetic coils (found in wah-wah pedals and guitar amplifiers) and opto-isolators (found in tremolos and optical compressors). The proposed models are physically-based, passive, modular, and usable in real time. The second approach is comparable to "grey box" modeling. It aims to retrieve the topology and constitutive laws of a circuit from measurements. The learning of the circuit topology is informed by an underlying port-Hamiltonian formulation, and nonlinearities are concomitantly addressed through kernel-based methods. Thus, necessary physical properties are enforced, while the use of reproducing kernels allows for a variety of nonlinear behaviors to be described with a smaller number of parameters and a higher interpretability compared to neural network methods. Finally, a possible generalization of this approach for a larger class of circuits is outlined through the introduction of the Koopman operator
Kavousanos-Kavousanakis, Andreas. „Design and implementation of a DSP-based control interface unit (CIU)“. Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FKavousanos-Kavousanakis.pdf.
Der volle Inhalt der QuelleThesis advisor(s): Xiaoping Yun. Includes bibliographical references (p. 61-63). Also available online.
Křížek, Miroslav. „Měřicí modul s A/D převodníkem se současným vzorkováním“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217840.
Der volle Inhalt der QuelleBuschbaum, Felix. „Virtual heroes in interactive worlds analytical narrative in detective adventure games“. Marburg Tectum-Verl, 2008. http://d-nb.info/989296415/04.
Der volle Inhalt der QuelleTankha, Vijay. „The analogy between virtue and crafts in Plato's early dialogues /“. Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74591.
Der volle Inhalt der QuelleHarper, Reuben. „The analogy of love : the virtue ethic of St Maximus the confessor“. Thesis, University of Winchester, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.698193.
Der volle Inhalt der QuelleKjellvertz, Katarina. „Spindelfobikers upplevelse av virtuell exponeringsbehandling“. Thesis, Stockholms universitet, Psykologiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-126365.
Der volle Inhalt der QuelleWu, Jiang. „Development of Inhibitors and Assay Methods for Histone Acetyltransferases“. Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/chemistry_diss/52.
Der volle Inhalt der QuelleAndersson, David. „Google Earth – användbart fågelperspektiv eller bara en fluga? : En didaktisk uppsats om digitala och analoga undervisningsmetoder inom gymnasiegeografi“. Thesis, Växjö University, School of Social Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-7096.
Der volle Inhalt der QuelleBakom uppsatsen finns ett genuint intresse för kartmedier samt funderingen om kartan genomgår en evolution till att bli ett digitalt och interaktivt medium. I aktuella styrdokument för gymnasiegeografin framgår att såväl kartor som GIS skall finnas med i undervisningen, motiveringen är dock bristfällig. I syftet väcktes därför frågor om vilka belägg som fanns för digitala undervisningsmetoder inom geografi? Syftet kondenserades till frågeställningarna: Vad skrivs i litteraturen om digitalt lärande i geografi i allmänhet? Vad skrivs i litteraturen om att använda digitala kartor och programmet Google Earth i undervisningen i synnerhet? Hur svenska geografilärare ser på samt i vilken omfattning de använder digitala kartmedier? För att besvara frågorna genomfördes en litteraturstudie samt en enkätundersökning. Litteraturstudieresultatet visade främst två saker. För det första att valet av digitala eller analoga undervisningsmetoder har liten betydelse för inlärning av grundläggande kunskaper. För det andra ifrågasattes användandet av alltför avancerade digitala kartmedier. Enkätundersökningen visade att väggkartan är det kartmedium som används mest bland respondenterna. Slutsatsen var att resultatet inte gett något svar om vilken metod som är bäst för inlärningen men att enklare digitala applikationer, såsom Google Earth, kan bidra till en förbättrad undervisning om de används på ett ändamålsenligt sätt.
Thorn-Andersen, David. „Google Earth – användbart fågelperspektiv eller bara en fluga? : En didaktisk uppsats om digitala och analoga undervisningsmetoder inom gymnasiegeografi“. Thesis, Linnéuniversitetet, Institutionen för samhällsvetenskaper, SV, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-7096.
Der volle Inhalt der QuelleContreras, Álvarez Renzo. „Globular: descubrimiento del cielo chileno como polo de la astronomía mundial: diseño experimental de una interfaz inmersiva a través de la analogía formal entre planetario y lentes de realidad virtua“. Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/143249.
Der volle Inhalt der Quelleglobular es un proyecto de realidad virtual inmersivo que busca contar, desde una perspectiva experimental y sensorial, cómo fueron descubiertos los cielos del Norte de Chile para la actividad astronómica a fines de los años 60 y comienzos de los 70, por parte de organizaciones internacionales como AURA y ESO. Este hecho marca un hito en las ciencias del espacio, cruzado también por el contexto histórico y político por el cual atravesó Chile, sumado a la instauración de dispositivos culturales como el Planetario Chile que perpetuaba una promesa de modernidad y esplendor cultural, desentendiendo el significado del territorio nacional como cuna astronómica mundial
Haverås, Daniel. „Data Race Detection for Parallel Programs Using a Virtual Platform“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230189.
Der volle Inhalt der QuelleDatakapplöpning är en mycket destruktiv typ av bugg i samtidig programvara. På grund av icke-ordnad sammanvävning av trådar kan datakapplöpning slumpmässigt dyka upp och försvinna under avlusning (debugging), vilket gör dem svåra att hitta och återskapa. Datakapplöpning existerar när flera trådar eller processer samtidigt accessar en delad minnesaddress och minst en av accesserna är en skrivning. Ett sådant scenario kan orsaka datakorruption, minnesläckor, krascher eller felaktig exekvering. Det är därför viktigt att datakapplöpning inte finns med i programvara för slutlig release. Det här examensarbetet utforskar dynamisk detektion av datakapplöpning i program som körs på Ericssons System Virtualization Platform (SVP), en SystemC/TLM-2.0baserad virtuell platform som används för att köra program på simulerad hårdvara. SVP är en bit-exakt simulator för hårdvara av typen Ericsson Many-Core Architecture (EMCA), vilket möjliggör parallell utveckling av hårdvara och programvara samt unik inblick i programvaruexekvering. Den senare egenskapen hos SVP har använts för att implementera SVPracer, en konceptvalidering av dynamisk detektion av datakapplöpning. SVPracer baseras på en algoritm av typen happens-before, som liknar den i Googles ThreadSanitizer v2. Stora skillnader finns dock i SVPracers implementation eftersom den instrumenterar binärkod under körning, utan att behöva modifiera koden under kompilering. Ett antal testprogram med olika typer av datakapplöpning skapades för (EOS), ett operativsystem som körs på EMCAs signalprocessorer (DSP). Motsvarande program skrevs för Linux med POSIX-APIer, för att kunna jämföra SVPracer med ThreadSanitizer v2. Både SVPracer och ThreadSanitizer v2 upptäckte datakapplöpningarna i samtliga testprogram. SVPracer kräver vidare arbete för att eliminera några falska positiva resultat orsakade av saknat stöd för vissa OS-funktioner, exempelvis semaforer. Trots det bedöms SVPracers nuvarande prestanda som tillräckligt bevis för att virtuella plattformar kan användas för detektion av datakapplöpning. Framtida arbete skulle kunna involvera utforskning av andra detektionsalgoritmer samt detektion av baklås.
Li, Yao. „Proposition d'extension à SystemC-AMS pour la modélisation, la conception et la vérification de systèmes mixtes analogiques-numériques“. Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066190.
Der volle Inhalt der QuelleMixed-signal applications are among the fastest growing market segments in the electronics and semiconductor industry. This is driven by the growth opportunities in mobile communication, networking, power management, automotive, medical, imaging, and security applications, which all require analog and mixed-signal (AMS) content. One bottleneck exists if the designs include analog components together with digital ones. Digital design has a well-defined, top-down design methodology, but AMS design has traditionally been an ad hoc custom design process, it is more time-consuming interactive process and fully based on designerÕs expertise. The major difficulty is how to model the impact of circuit non-idealities and technology process variations on system- level performances.In this thesis, we present an unified modeling, design and verification platform with a fast sizing and biasing methodology. The proposed methodology propagates the circuit-level non- idealities into system-level simulations in a very natural way. The methodology synchronizes SystemC-AMS TDF MoC and electrical circuit simulator (SPICE), which enables to mix non- conservative system-level model with conservative nonlinear circuit netlist. Besides, we explain how UVM-SystemC-AMS developed in the FP7 Verdi project, provides an unified methodology for the verification of systems having interconnected AMS, HW/SW. In order to explore the effectiveness of the proposed methodology, two case studies are investigated: a 3-stage 6-bit ADC pipeline and a voltage regulator for an implantable telemetric system. The problem of hierarchical design is illustrated in the 3-stage 6-bit ADC pipeline while the problem of system architecture with feedback loop is illustrated in the implantable telemetric system
DiCola, Paul S. „Socrates, Irwin, and Instrumentalism“. Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1212521001.
Der volle Inhalt der QuellePuhakka, Heli. „From analogue to digital: Drawing the human form by examining creative practices, techniques and experiences of practitioners within immersive technology“. Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/134466/1/Heli_Puhakka_Thesis.pdf.
Der volle Inhalt der QuelleCalvo, Arévalo Carlos. „Tras la pregunta por la virtud. Un análisis de Laques de Platón: 178a-190e“. Tesis, Universidad de Chile, 2006. http://repositorio.uchile.cl/handle/2250/110403.
Der volle Inhalt der QuelleLi, Yao. „Proposition d'extension à SystemC-AMS pour la modélisation, la conception et la vérification de systèmes mixtes analogiques-numériques“. Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066190.
Der volle Inhalt der QuelleMixed-signal applications are among the fastest growing market segments in the electronics and semiconductor industry. This is driven by the growth opportunities in mobile communication, networking, power management, automotive, medical, imaging, and security applications, which all require analog and mixed-signal (AMS) content. One bottleneck exists if the designs include analog components together with digital ones. Digital design has a well-defined, top-down design methodology, but AMS design has traditionally been an ad hoc custom design process, it is more time-consuming interactive process and fully based on designerÕs expertise. The major difficulty is how to model the impact of circuit non-idealities and technology process variations on system- level performances.In this thesis, we present an unified modeling, design and verification platform with a fast sizing and biasing methodology. The proposed methodology propagates the circuit-level non- idealities into system-level simulations in a very natural way. The methodology synchronizes SystemC-AMS TDF MoC and electrical circuit simulator (SPICE), which enables to mix non- conservative system-level model with conservative nonlinear circuit netlist. Besides, we explain how UVM-SystemC-AMS developed in the FP7 Verdi project, provides an unified methodology for the verification of systems having interconnected AMS, HW/SW. In order to explore the effectiveness of the proposed methodology, two case studies are investigated: a 3-stage 6-bit ADC pipeline and a voltage regulator for an implantable telemetric system. The problem of hierarchical design is illustrated in the 3-stage 6-bit ADC pipeline while the problem of system architecture with feedback loop is illustrated in the implantable telemetric system
Sinha, Udayan Prabir. „Memory Management Error Detection in Parallel Software using a Simulated Hardware Platform“. Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-219606.
Der volle Inhalt der QuelleMinneshanteringsfel i parallell mjukvara som exekverar på flerkärniga arkitekturer kan vara svåra att detektera, samt kostsamma att åtgärda. Exempel på fel kan vara användning av ej initialiserat minne, minnesläckage, samt att data blir överskrivna av en process som inte är ägare till de data som skrivs över. Om minneshanteringsfel kan detekteras i ett tidigt skede, t ex genom att använda en simulator, som körs innan mjukvaran har levererats och integrerats i en produkt, skulle man kunna erhålla signifikanta kostnadsbesparingar. Detta examensarbete undersöker och utvecklar metoder för detektion av ej initialiserat minne i mjukvara som körs på en virtuell plattform. Den virtuella plattformen innehåller modeller av delar av den digitala hårdvara, för basband och radio, som finns i en Ericsson radiobasstation. Modellerna är bit-exakta representationer av motsvarande hårdvarublock, och innefattar processorer och periferienheter. Den virtuella plattformen används av Ericsson för utveckling och integration av mjukvara. Det finns verktyg, exempelvis Memcheck (Valgrind), samt MemorySanitizer och AddressSanitizer (Clang), som kan användas för att detektera minneshanteringsfel. Egenskaper hos sådana verktyg har undersökts, och algoritmer för detektion av minneshanteringsfel har utvecklats, för en specifik processor och dess instruktioner. Algoritmerna har implementerats i en virtuell plattform, och kravställningar och design-överväganden som speglar den tillämpnings-specifika instruktionsrepertoaren för den valda processorn, har behandlats. En prototyp-implementation av presentation av minneshanteringsfel, där källkodsraderna samt anropsstacken för de platser där fel har hittats pekas ut, har utvecklats, med användning av en debugger. Ett experiment, som använder sig av ett för ändamålet utvecklat program, har använts för att utvärdera feldetektions-förmågan för de algoritmer som implementerats i den virtuella plattformen, samt för att jämföra med feldetektions-förmågan hos Memcheck. De algoritmer som implementerats i den virtuella plattformen kan, för det program som används, detektera alla kända fel, förutom ett. Algoritmerna rapporterar också falska felindikeringar. Dessa rapporter är huvudsakligen ett resultat av att den aktuella implementationen har begränsad kunskap om det operativsystem som används på den simulerade processorn.
Tan, Jennifer Pei-Ling. „Digital kids, analogue students : a mixed methods study of students' engagement with a school-based Web 2.0 learning innovation“. Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30396/1/Jennifer_Tan_Thesis.pdf.
Der volle Inhalt der QuelleTan, Jennifer Pei-Ling. „Digital kids, analogue students : a mixed methods study of students' engagement with a school-based Web 2.0 learning innovation“. Queensland University of Technology, 2009. http://eprints.qut.edu.au/30396/.
Der volle Inhalt der QuelleKarlström, Daniel. „Implementation of data-collection tools using NetFlow for statistical analysis at the ISP level“. Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-16140.
Der volle Inhalt der QuelleAtt försvara sig mot DoS-och DDoS-attacker är svårt att åstadkomma; att hitta och filtrera ut illegitim trafik från det legitima flödet är nästan omöjligt. Att vidta åtgärder när en sådan attack upptäcks kan endast göras när IP-adresserna från angriparna är kända. Detta kan uppnås genom att man övervakar trafikflödet mellan målet för attacken och angriparna och ser vilka som sänder mest data och på så sätt identifierar angriparna.. Detta tillåter företaget eller dess ISP att blockera trafiken ifrån dessa IP-adresser genom att sända trafiken vidare till ingenstans. Detta kallas blackhole-routing eller null-routing. Genom att använda redovisnings- och övervakningsprogrammet pmacct syftar denna uppsats på att undersöka hurvida pmacct-sviten är lämpad för större installationer när det gäller att spåra och förhindra DDoS-attacker, såsom hos en Internetleverantör eller dylikt. Potentialla problem som kan uppstå är att mängden trafik som måste analyserar blir för stor och för krävande. Denna avhandling går även igenom pmacct-verktyget i sig. Slutsatserna är lovande, vilket indikerar att den har potential av att kunna hantera sådana stora miljöer med noggrann planering.
Souza, Anderson de Medeiros. „Proposta metodol?gica para o imageamento, caracteriza??o, parametriza??o e gera??o de modelos virtuais de afloramentos“. Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18365.
Der volle Inhalt der QuellePetr?leo Brasileiro SA - PETROBRAS
The aim of this work was to describe the methodological procedures that were mandatory to develop a 3D digital imaging of the external and internal geometry of the analogue outcrops from reservoirs and to build a Virtual Outcrop Model (VOM). The imaging process of the external geometry was acquired by using the Laser Scanner, the Geodesic GPS and the Total Station procedures. On the other hand, the imaging of the internal geometry was evaluated by GPR (Ground Penetrating Radar).The produced VOMs were adapted with much more detailed data with addition of the geological data and the gamma ray and permeability profiles. As a model for the use of the methodological procedures used on this work, the adapted VOM, two outcrops, located at the east part of the Parnaiba Basin, were selected. On the first one, rocks from the aeolian deposit of the Piaui Formation (Neo-carboniferous) and tidal flat deposits from the Pedra de Fogo Formation (Permian), which arises in a large outcrops located between Floriano and Teresina (Piau?), are present. The second area, located at the National Park of Sete Cidades, also at the Piau?, presents rocks from the Cabe?as Formation deposited in fluvial-deltaic systems during the Late Devonian. From the data of the adapted VOMs it was possible to identify lines, surfaces and 3D geometry, and therefore, quantify the geometry of interest. Among the found parameterization values, a table containing the thickness and width, obtained in canal and lobes deposits at the outcrop Pared?o and Biblioteca were the more relevant ones. In fact, this table can be used as an input for stochastic simulation of reservoirs. An example of the direct use of such table and their predicted radargrams was the identification of the bounding surface at the aeolian sites from the Piau? Formation. In spite of such radargrams supply only bi-dimensional data, the acquired lines followed of a mesh profile were used to add a third dimension to the imaging of the internal geometry. This phenomenon appears to be valid for all studied outcrops. As a conclusion, the tool here presented can became a new methodology in which the advantages of the digital imaging acquired from the Laser Scanner (precision, accuracy and speed of acquisition) were combined with the Total Station procedure (precision) using the classical digital photomosaic technique
Neste trabalho s?o apresentados os procedimentos metodol?gicos necess?rios para realizar o imageamento digital 3D da geometria externa e interna de afloramentos an?logos a reservat?rios, e elaborar seus Modelos Virtuais de Afloramentos (MVA). Para imagear a geometria externa foram utilizados o Laser Scanner, o GPS Geod?sico e a Esta??o Total, enquanto que para imagear a geometria interna foi utilizado o GPR. Nos MVA elaborados foram acrescidas ainda as informa??es geol?gicas e as obtidas nas perfilagens com raios gama e de permeabilidade. Como estudo de caso, para exemplificar os procedimentos metodol?gicos propostos, foram escolhidos dois conjuntos de afloramentos na borda leste da Bacia do Parna?ba. Na primeira ?rea ocorrem rochas de origem e?lica da Forma??o Piau? (Neocarbon?fero) e plan?cie de mar? da Forma??o Pedra de Fogo (Permiano), que afloram em um amplo corte de estrada, situado entre Floriano e Teresina (Piau?). A segunda ?rea, situada no Parque Nacional de Sete Cidades, tamb?m no Piau?, envolve rochas da Forma??o Cabe?as depositadas em sistemas fl?vio-deltaicos, durante o Neodevoniano. Com os MVA elaborados foi poss?vel identificar, linhas, superf?cies e geometrias 3D e, assim, quantificar as geometrias de interesse. Dentre as parametriza??es mais relevantes, ressaltam-se a tabela com valores de espessura e largura, obtidas em dep?sitos de canais e em lobos, nos afloramentos Pared?o e Biblioteca. Esta tabela pode ser utilizada como entrada (input) para simula??o estoc?stica de reservat?rios. Um exemplo da aplica??o direta dos radargramas interpretados foi a identifica??o de superf?cies limitantes, em dep?sitos e?licos, da Forma??o Piau?. Apesar dos radargramas oferecerem apenas dados bidimensionais, a aquisi??o de linhas distribu?das segundo uma malha acrescentou a terceira dimens?o ao imageamento das geometrias internas em todos os afloramentos estudados. ? ainda proposta uma nova metodologia que busca conciliar as vantagens obtidas com o imageamento digital com Laser Scanner (precis?o, acur?cia e velocidade de aquisi??o) e a Esta??o Total (precis?o), com o uso cl?ssico de fotomosaicos digitais
Lang, Rostislav. „Návrh a výpočet membránové konstrukce zastřešení stadionu“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226463.
Der volle Inhalt der QuelleHaddad, Ahmed. „GeRoFan : une architecture et un plan de contrôle basés sur la radio-sur-fibre pour la mutualisation des réseaux d'accès mobile de nouvelle génération“. Thesis, Paris, ENST, 2013. http://www.theses.fr/2013ENST0025/document.
Der volle Inhalt der QuelleCurrent radio access networks architectures are not suited in terms of capacity and backhauling capabilities to fit the continuing traffic increase of 4G cellular systems. The objective of the thesis is to propose an innovative and generic mobile backhauling network architecture, called GeRoFAN (Generic Radio-over-Fiber Access Network), for next generation mobile systems (WiMAX, 4G LTE). Two major technological innovations are used to implement GeRo-FAN: analog Radio-over-Fiber (RoF) and reflective amplified absorption modulators. The aim of this thesis is to design for such an architecture an original Control Plane (CP) and a signaling channel enabling to balance radio resources between a set of neighboring cells at the access/metropolitan scale according to traffic fluctuations. The transmission of several radio frequencies by means of an analog RoF link suffers from several impairments that may degrade the capacity of the radio system. The originality of the GeRoFAN-CP consists in mapping radio frequencies with optical carriers by means of Sub-Carrier Multiplexing (SCM) in order to optimize the Shannon’s capacity within the various cells covered by the system according to the current traffic load. For that purpose, a deep analysis and modeling of the various physical layer impairments impacting the quality of the radio signal is carried out. Unlike comparable approaches, the GeRoFAN-CP is as independent as possible from the radio layer protocols. Thus, the "radio MAC-agnostic" nature of the GeRoFAN-CP enables to federate multiple operators using different radio technologies onto the same backhauling optical infrastructure. Subcarrier and wavelength division multiplexing (SCM/WDM) as well as WDM optical routing capabilities are exploited onto the GeRoFAN transparent architecture. More globally, the GeRoFAN-CP enables a form of "radio frequency virtualization" while promoting new business models for Telecom service providers. The last part of the thesis focuses on the business value of the GeRoFAN paradigm. The expectations of the different stake-holders and main regulatory/organizational entities that could be involved in the deployment of GeRoFAN infrastructures should be addressed in order to achieve a smooth deployment of this new type of mobile backhauling. Economics of the GeRoFAN architecture are investigated in terms of OpEx/CapEx valuation and investment profitability, especially in reference to digitized RoF. Two business models are then proposed to study how GeRoFAN contributes to enriching the cellular backhauling service value chain
Haddad, Ahmed. „GeRoFan : une architecture et un plan de contrôle basés sur la radio-sur-fibre pour la mutualisation des réseaux d'accès mobile de nouvelle génération“. Electronic Thesis or Diss., Paris, ENST, 2013. http://www.theses.fr/2013ENST0025.
Der volle Inhalt der QuelleCurrent radio access networks architectures are not suited in terms of capacity and backhauling capabilities to fit the continuing traffic increase of 4G cellular systems. The objective of the thesis is to propose an innovative and generic mobile backhauling network architecture, called GeRoFAN (Generic Radio-over-Fiber Access Network), for next generation mobile systems (WiMAX, 4G LTE). Two major technological innovations are used to implement GeRo-FAN: analog Radio-over-Fiber (RoF) and reflective amplified absorption modulators. The aim of this thesis is to design for such an architecture an original Control Plane (CP) and a signaling channel enabling to balance radio resources between a set of neighboring cells at the access/metropolitan scale according to traffic fluctuations. The transmission of several radio frequencies by means of an analog RoF link suffers from several impairments that may degrade the capacity of the radio system. The originality of the GeRoFAN-CP consists in mapping radio frequencies with optical carriers by means of Sub-Carrier Multiplexing (SCM) in order to optimize the Shannon’s capacity within the various cells covered by the system according to the current traffic load. For that purpose, a deep analysis and modeling of the various physical layer impairments impacting the quality of the radio signal is carried out. Unlike comparable approaches, the GeRoFAN-CP is as independent as possible from the radio layer protocols. Thus, the "radio MAC-agnostic" nature of the GeRoFAN-CP enables to federate multiple operators using different radio technologies onto the same backhauling optical infrastructure. Subcarrier and wavelength division multiplexing (SCM/WDM) as well as WDM optical routing capabilities are exploited onto the GeRoFAN transparent architecture. More globally, the GeRoFAN-CP enables a form of "radio frequency virtualization" while promoting new business models for Telecom service providers. The last part of the thesis focuses on the business value of the GeRoFAN paradigm. The expectations of the different stake-holders and main regulatory/organizational entities that could be involved in the deployment of GeRoFAN infrastructures should be addressed in order to achieve a smooth deployment of this new type of mobile backhauling. Economics of the GeRoFAN architecture are investigated in terms of OpEx/CapEx valuation and investment profitability, especially in reference to digitized RoF. Two business models are then proposed to study how GeRoFAN contributes to enriching the cellular backhauling service value chain
Chen, Shih-Hung, und 陳世浤. „Virtual Bass with Analog Circuit Realization“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86661687637049291454.
Der volle Inhalt der Quelle國立成功大學
電機工程學系碩博士班
95
The goal of this thesis is to propose a new algorithm of virtual bass with analog circuits realization. The proposed method utilized the technique of psycho-acoustic to enhance low frequency parts of the audio signals without other costs in contrast with conventional methods which have trade-off in some performances. Poor low frequency response of small size speakers and headphones is a well-known problem. In this thesis, a new algorithm with proposed harmonics generator is first presented that we make use of theorem of missing fundamental to generate harmonics of fundamental frequency and replace it. Then the compensation followed by equal-loudness contour analysis is made to achieve the technique of loudness matching. The processed low frequency components of audio signals are then added with original high frequency components to replace the original audio signals. It is so-called virtual bass. The proposed harmonics generator includes a hysteresis comparison generator and a half-wave rectifier to generate odd and even harmonics. We also propose some simple architecture composed of analog circuits to realize the proposed algorithm which include the proposed full-wave rectifier, odd harmonics generator and even harmonics generator and use the switched-capacitor to replace the large resistance to realize filters. The detailed verification and performance will be described in the following chapters.
Johns, Calvin Thomas. „The social poetics of analog virtual worlds : toying with alternate realities“. Thesis, 2015. http://hdl.handle.net/2152/31367.
Der volle Inhalt der QuelleLin, Yu-Der, und 林育德. „Virtual Analog Synthesizer Discussion: Implementation of Triangle Wave Used in Sound Synthesis“. Thesis, 2012. http://ndltd.ncl.edu.tw/handle/24115504607729232829.
Der volle Inhalt der Quelle國立交通大學
工學院聲音與音樂創意科技碩士學位學程
100
This thesis discuss the source geometric waveforms in early analog synthesizer which use subtractive synthesis as sound designing principle. Implement the classical synthesizer triangle waveforms with reduced aliasing. This method are base on the concept of waveshaping a sine wave and modify the harmonic contents with a filter. Sound quality evaluation using masking effect and hearing threshold models shows that waveshape triangle wave method is perceptually alias-free over almost whole register of the grand piano to note G7 (MIDI number 103). It is applicable in digital implementations of subtractive sound synthesizer.
Fajnerová, Iveta. „Vnímání prostoru v prostředí virtualní reality“. Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-312667.
Der volle Inhalt der QuelleCaarp, April. „Alla är lyckade och lyckliga på Instagram : En retorisk receptionsstudie om hur unga kvinnor upplever och tolkar innehållet som visas på Instagram“. Thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54977.
Der volle Inhalt der QuelleValiderat; 20160607 (global_studentproject_submitter)