Дисертації з теми "BTX sensors"
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Kumar, Abhishek. "Development, characterization and experimental validation of metallophthalocyanines based microsensors devoted to monocyclic aromatic hydrocarbon monitoring in air." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22635/document.
Повний текст джерелаThis PhD work is dedicated to investigate potentialities of phthalocyanines materials to realize a Quartz Crystal Microbalance (QCM) sensor for Benzene, Toluene and Xylenes (BTX) detection in air. The goal is to develop a sensor-microsystem capable of measuring BTX concentrations quantitatively below the environmental guidelines with sufficient accuracy. To achieve these objectives, our strategies mainly focused on experimental works encompassing sensors realization, sensing material characterizations, development of gas-testing facility and sensor testing for different target gases. One of the main aims is to identify most appropriate phthalocyanine material for sensor development. After comparative sensing studies, tert-butyl-copper phthalocyanine based QCM device is found as most sensitive and detail metrological characteristics are further investigated. Results show repeatable, reversible and high magnitude of response, low response and recovery times, sub-ppm range detection limit, high resolutions and combined selectivity of BTX gases among common atmospheric pollutants. Special focus is given to understand the gas/material interactions which are achieved by (a) XRD and SEM characterizations of sensing layers, (b) formalization of a two-step adsorption model and (c) assessing extent of diffusion of target gas in sensing layer. At last, possible ageing of sensor and suitable storage conditions to prevent such effect are investigated
Lima, Kassio Michell Gomes de. "Sensores opticos e instrumentação para determinação de contaminantes em aguas." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250562.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
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Resumo: Este trabalho descreve o desenvolvimento de sensores ópticos para determinação de benzeno, tolueno, etilbenzeno e xilenos (BTEX) e de íons metálicos em águas. Para a determinação de BTEX, monolitos de polidimetilsiloxano (PDMS) foram colocados dentro de um frasco preenchido com soluções aquosas dos compostos BTEX por um determinado tempo. Em seguida, a fase sensora era removida da solução, seca rapidamente e inserida num sistema de medidas, empregando-se um espectrofotômetro FT-NIR. Limites de detecção de 0,079; 0,12; 0,14 e 0,28 mg L para benzeno, tolueno, etilbenzeno e xilenos foram alcançados. A fase sensora foi aplicada a amostras de águas contaminadas por gasolina, quantificando teores de BT (benzeno e tolueno) sem diferença estatística, no nível de 95% de confiança, comparada a técnica GC-FID. A fase sensora também foi usada na determinação simultânea de BTX. Valores de RMSEP (raiz quadrada do erro médio quadrático de previsão) de 0,57 mg L para benzeno, 2,21 mg L para tolueno e 1,23 mg L para xilenos foram alcançados. Um fotômetro no infravermelho próximo baseado em LED (diodos emissores de luz) para a determinação de BTEX total foi desenvolvido. O instrumento desenvolvido opera com dois LED, um fotodiodo, um sistema de fibras ópticas para captação da radiação, célula de transmissão e um programa em Visualbasic.Net para controle e aquisição de dados. O instrumento pode ser uma alternativa viável, de baixo custo para a determinação de BTEX total em águas. Foi avaliado o comportamento do novo reagente luminescente di(hexafluorofosfato) de bis(1,10-fenantrolina)(2-(1H-imidazo[4,5- f][1,10]fenantrolina)Rutenio (II), abreviadamente [Ru(phen)2iip](PF6)2, no desenvolvimento de um sensor óptico para a determinação de íons metálicos em águas. A imobilização do reagente em matrizes poliméricas revelou que o sensor óptico e seletivo ao íon Cu(II), apresentando limite de detecção 32 mg L. O novo complexo de rutênio (II) foi aplicado numa determinação simultânea dos íons metálicos Cu(II) e Hg(II) em solução aquosa, alcançando valores de RMSEP de 2,12 mg L e 0,95 mg L, respectivamente
Abstract: This work describes the development of optical sensors for determination of benzene, toluene, ethylbenzene and xylenes (BTEX) and metal ions in water. For the determination of BTEX, monoliths of polydimethylsiloxane (PDMS) were inserted into a bottle filled with aqueous solutions of BTEX compounds for a pre-defined period of time. Afterwards the sensing phase was removed from the solution, dried and placed in the detection system of an FT-NIR spectrophotometer. Detection limits of 0.079, 0.12, 0.14 and 0.28 mg L for benzene, toluene, ethylbenzene and xylenes, respectively, have been achieved. The sensing phase was applied to the determination of benzene and toluene in water samples contaminated by gasoline, providing results that did not show statistical differences from those obtained by GC-FID at a confidence level of 95%. The sensing phase was also applied to the simultaneous determination of BTX in contaminated water, providing RMSEP values (root mean square error of prediction) of 0.57 mg L for benzene, 2.21 mg L for toluene and 1.23 mg L for xylenes. A near infrared photometer based on LED (light emitting diodes) for the determination of total BTEX was developed. The instrument operates with two LED as light sources and a photodiode as detector, a transmission cell connected to an optical fiber bundles; a VisualBasic.Net program was written for control and data acquisition. The instrument performance indicated that it can be a feasible and low cost alternative for the determination of total BTEX in water. Finally, it was evaluated the performance of the new luminescent reagent bis(1,10-phenanthroline)(2-(1H-imidazol-2- yl)-1H-imidazo[4,5-f][1,10]phenanthroline)ruthenium(II) di(hexafluorophosphate) for the development of an optical sensor for the determination of metal ions in water. The immobilization the reagent in the polymeric matrices showed that the optical sensor is selective to Cu (II) ion, providing a detection limit of 32 mg L. The new complex of ruthenium (II) was also applied to the simultaneous determination of Cu (II) and Hg (II) in aqueous solution, showing RMSEP values 2.12 mg L and 0.95 mg L, respectively
Doutorado
Quimica Analitica
Doutor em Ciências
Hannani, Adnan. "Analysis of authentication systems : which is the most suitable for BTG?" Thesis, University West, Department of Technology, Mathematics and Computer Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-464.
Повний текст джерелаTörnquist, Martin. "Investigation of rotational velocity sensors." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15904.
Повний текст джерелаTo improve the speed measurement of construction equipment, different sensor technologies have been investigated. Many of these sensor technologies are very interesting but to keep the extent of the thesis only two was chosen for testing, magnetic absolute angle sensors using Hall and GMR technology, to investigate if those are a valid replacement for the current measurement system that is using a passive sensor. Tests show that these sensors are capable of speed measurement, but because of noisy angle estimates they need filtering for good speed computation. This filtering introduces a large time delay that is of significance for the quality of the estimate. A Kalman filter has been implemented in an attempt to lower the time delays but since only a very simple model has been used it does not give any improvements over ordinary low pass filtering. For these sensors the mounting tolerance is of great interest. For best performance the offset between the sensor and magnet centres need to be kept small for both sensors. This is due to a non-linearity effect this causes. The distance between the sensors and the magnet is not critical for linearity issues, but only for the quality of the signal, where it might drop out when the distance is too large. This is where the sensor using GMR technology stands out. Compared to the Hall technology sensor, the GMR sensor can handle distances that are more than 10 times larger. The conclusion is that these sensors can be a valid replacement of the current measurement system. They will introduce more functionality with the capability of detecting rotational direction and zero velocity. In an application with more than one sensor they can also be used for more purposes, like detecting slip in clutches etc. Depending on the application, the time delays may not be critical, else more work need to be done to improve the estimate, e.g. with a more advanced model for the Kalman filter.
Young, Christina Rachel. "FT-IRr and quantum cascade laser spectroscopy towards a hand-held trace gas sensor for benzene, toluene, and xylenes (BTX)." Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31702.
Повний текст джерелаCommittee Chair: Boris Mizaikoff; Committee Member: Facundo Fernandez; Committee Member: Jiri Janata; Committee Member: Mark Disko; Committee Member: Oliver Brand; Committee Member: Thomas Orlando. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Young, Christina Rachel. "FT-IR and quantum cascade laser spectroscopy towards a hand-held trace gas sensor for benzene, toluene, and xylenes (BTX)." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31702.
Повний текст джерелаAhmed, Fahad. "Invasive and non-invasive detection of bias temperature instability." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52227.
Повний текст джерелаSilva, Gilvaldo Gentil Da. "Métodos de síntese de estruturas metal-orgânicos de [Cu3(BTC)2.(H2O)3]n e Derivados e Aplicações para Sensores Eletroquímicos." UNIVERSIDADE FEDERAL DE PERNAMBUCO, 2015. https://repositorio.ufpe.br/handle/123456789/15775.
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CNPQ E CAPES
Na elaboração de sínteses para estrutura metal-orgânica (Cu3BTC2), conhecido como MOE-199, ou HKUST-1, uma rota e dois métodos foram desenvolvidos: Eletroquímica em temperatura ambiente (TA) e moderada (TM), sonoeletroquímica e ablação de laser em líquido, a qual proporcionou um material desejado com moderado rendimento. Muitas técnicas de caracterização (XRD, FT–IR, SEM, e TGA) mostraram que o HKUST-1 foi obtido em muitos métodos. No entanto, foram encontradas diferenças interessantes em funcionalização, dependendo das condições de síntese que produziram a mesma estrutura de [Cu3(BTC)2] com hospedeiros, mas com diferentes espécies hóspedes coordenada em geral. Por análise de padrão de DRX foi possível identificar os picos característicos de CuO no método EQ do material obtido com fase secundária, mostrando que esta metodologia é bastante versátil dando lugar a este produto, embora o complexo [Cu3(BTC)2] tenha obtido bons rendimentos. Indepen- dentemente da fonte de energia aplicada, em todos os processos, a desejada MOE [Cu3(BTC)2] foi obtida. A fim de determinar se o método de síntese teve impacto diretamente sobre o comportamento eletroquímico do material, foi aplicada a voltametria cíclica (CV), para investigação. Os resultados eletroquímicos demonstraram que a resistência à contribuição farádica, aumenta na seguinte ordem: Cu-MOFSEQ < Cu-MOFEQ(TA) < Cu-MOFEQ(TM) e Cu-MOFLAL. Este comportamento pode ser associado com a presença de CuO em Cu-MOFEQ(TM) e de cobre em Cu-MOFLAL. No entanto, a MOE sintetizada à temperatura ambiente mostrou um teor menor de cobre, o que pode ser eletroquimicamente transformada, bem como a pureza, em comparação com os obtidos por método eletroquímico em temperatura moderada (TM) e a ablação a laser no estado líquido (LAL). Igual procedimento foi usado para os derivados de Cu-MOFEQ(RT): Cu(TFP)-MOF, and Cu(TPP).DMF-MOF. Eles apresentaram a seguinte ordem de crescimento: Cu(TFP)-MOF < Cu(TFP)DMF-MOF < Cu-MOF < Cu(DMF)-MOF. Este comportamento pode ser associado à presença da tetrafenilporfirina em Cu(TPP)-MOFEQ e Cu(TPP).DMF–MOFEQ. Seus comportamentos eletroquímicos apresentaram uma grande resistência faradáica mostrando o porquê dos seus efeitos de métodos.
In the elaboration of syntheses for metal-organic framework [Cu3(BTC)2] (commonly known as MOF-199 or HKUST-1), one route and two methods were developed: Electrochemical in room temperature (RT) and upper (HT), sonoelectrochemical and Laser ablation in Liquid (LAL); which afforded the desired material in moderate yields. Several characterization techniques (XRD, FT–IR, SEM and TGA) showed that HKUST-1 was obtained in every method. However, were found interesting differences in functionalization depending on the electrochemical synthesis conditions which produced the same [Cu3(BTC)2] host network but with different coordinative and bulk molecular guests. By XRD pattern analysis, it was possible to identify characteristic peaks of CuO and DMF in the EQ, obtained material as secondary phase, showing that this methodology is quite harsh giving place to this product, although the [Cu3(BTC)2] complex was obtained in good yield. Regardless the energy source applied, in all three cases the desired [Cu3(BTC)2] MOF was obtained. In order to determine if the method of synthesis had impacts directly on the electrochemical behavior of the material was applied cyclic voltammetry (CV), for investigation. The electrochemical results have shown that the resistance to the faradic contribution, increase in the following order: Cu–MOFSEQ < Cu–MOFEQ(RT) < Cu-MOFEQ(HT) < Cu–MOFLAL. This behavior can be associated to the presence of CuO in Cu-MOFEQ(HT) and Copper in Cu–MOFLAL. However, the synthesized MOF at room temperature showed a smaller content of copper, which could be electrochemically transformed, as well as purity, in comparison with those obtained by electrochemical (HT) and Laser ablation in Liquid (LAL) methods. The same procedure was used for derived of Cu-MOFEQ(RT): Cu(TFP)-MOF, and Cu(TPP).DMF-MOF. They presented the following growing order: Cu(TFP)-MOFEQ < Cu(TFP)DMF-MOFEQ < Cu-MOFEQ
Ingeström, Victor, and John Hansson. "A Method for Estimating Soot Load in a DPF using an RF-based Sensor." Thesis, Linköpings universitet, Institutionen för systemteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-77970.
Повний текст джерелаFavard, Alexandre. "Multicapteurs intégrés pour la détection des BTEX." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0123/document.
Повний текст джерелаOutdoor air quality is subjected to the law LAURE since 1996. In 2008, the european directive 2008/50/EC introduced measurement requirements and thresholds that should not be exceeded for certain pollutants on a european scale. According to several toxicological and epidemiological studies, air pollution causes respiratory failure, asthma, cardiovascular diseases and cancers. In Europe, air pollution is responsible for more than 300 000 early deaths a year.Volatile organic compounds (VOCs), particularly benzene, toluene, ethylbenzene and xylenes (BTEX compounds) are proven pollutants and play a major role in the degradation of indoor and outdoor air quality. This thesis is dedicated to the development of a metal oxide based multi-gas sensor for the detection of traces of BTEX within the framework of the SMARTY project (SMart AiR qualiTY). A complete electrical characterization system was designed and implemented for the detection of sub-ppm concentrations of BTEX.Based on the state-of-art, several materials were selected (WO3, ZnO, SnO2). The electrical characterizations of the selected sensitive layers were carried out under dry air and under different humidity levels in the presence of BTEX and interfering gases (NO2, CO2). Tungsten oxide (WO3) exhibits the best performance in the presence of moisture and is chosen for the technology transfer that accompanies the new patented AMU transducers. The WO3-based multi-sensor has a lower limit of detection (LOD) of 1 ppb at 50% relative humidity and effectively detects and quantifies BTEX
Solanki, Sanjay Champalal. "Implementation of laser range sensor and dielectric laser mirrors for 3D scanning of glove box environment." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001431.
Повний текст джерелаda, Silva Albuquerque Jackson. "Desenvolvimento de um sensor óptico para a determinação de hidrocarbonetos aromáticos em águas empregando a espectroscopia no infravermalho próximo (NIR)." Universidade Federal de Pernambuco, 2004. https://repositorio.ufpe.br/handle/123456789/6771.
Повний текст джерелаA contaminação de águas subterrâneas e superficiais com poluentes orgânicos, como os hidrocarbonetos presentes nos derivados de petróleo, causa um perigo potencial à saúde das populações, tornando-se necessário à avaliação contínua dos níveis de concentração destas substâncias. Para isso, é importante o desenvolvimento de técnicas analíticas de baixo custo para o monitoramento contínuo e remoto de águas de drenagem contaminadas e para o controle de efluentes industriais. Os hidrocarbonetos aromáticos, como o benzeno, o tolueno, o etilbenzeno e os xilenos (BTEX), são os constituintes da gasolina mais solúveis em água e, assim, podem se difundir com facilidade no lençol freático. A espectroscopia na região do Infravermelho Próximo (NIR) vem sendo adotada em várias áreas, como na agricultura, nas indústrias alimentícias, farmacêuticas, químicas e petroquímicas, por ser uma técnica simples, rápida, não-destrutiva e de baixo custo. O objetivo deste trabalho foi o desenvolvimento de um sensor óptico à base de uma fase sensora de silicona acoplada a um espectrofotômetro NIR (Infravermelho Próximo) para a determinação de BTEX em amostras aquosas. Inicialmente foram avaliados diferentes tipos de silicona com características apropriadas para construção do sensor, como transparência e plasticidade, tendo-se selecionado a silicona à base de Polidimetilsiloxano (PDMS). Um estudo dinâmico foi efetuado para avaliação do tempo de resposta da sonda para cada constituinte dos BTEX, adotando-se a resposta da sonda como sendo de um sistema de primeira ordem. Com este estudo, comprovou-se que o sistema tem um comportamento de primeira ordem, tornando válido o modelo proposto para a difusão de hidrocarbonetos aromáticos em silicona à base de PDMS. Os tempos de resposta para o benzeno, tolueno, etilbenzeno e m-xileno foram de 0,48 h, 1,34 h, 2,00 h e 1,97 h, respectivamente. Realizando-se uma análise por componentes principais dos dados espectrais obtidos para cada composto individualmente, misturas contendo BTEX e amostras contaminadas por gasolina e diesel, verificou-se que é possível distinguir se uma amostra aquosa tem um dos aromáticos em estudo e se a mesma foi contaminada por gasolina ou óleo diesel. Diante disso, pode-se concluir que o sistema sensor-NIR pode ser utilizado para determinação qualitativa de hidrocarbonetos aromáticos em águas superficiais e subterrâneas
Jaroo, Amer S. "Bridge Load Rating Using Dynamic Response Collected Through Wireless Sensor Networks." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1391692831.
Повний текст джерелаHamid, Hiwa F. "Bridge Condition Assessment Using Dynamic Response Collected Through Wireless Sensor Networks." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1391776500.
Повний текст джерелаFilipský, Dalibor. "Návrh a implementace systému pro kontrolu kompletnosti boxů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316273.
Повний текст джерелаSlováková, Kristína. "Studium ochranných vlastností fóliových a nánosovaných materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216474.
Повний текст джерелаCirilo, Herrera Gonzalo, and Rivas Franco Manuel Rivera. "Panorama actual de sistemas de entrenamiento asistido de box." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/657644.
Повний текст джерелаIn the past few years, technology used in sports has multiplied. Artificial intelligence, image and data processing at large scale are some of the most notable advancements. These technologies have allowed for several new products to flood the elite athlete market. These athletes use them to gage their performance and to keep a record of all their training sessions. Despite this new renaissance, and despite having a huge fanbase, boxing still has little research on training systems. In this investigation, various movement detection techniques will be explored and analyzed. Then, the architecture of these systems will be identified, and improvements will be suggested. Finally, we will review and compare the latest applications for boxing training.
Trabajo de investigación
Fernandes, Bertrand. "Development of a Magnetic Field Sensor System for Nondestructive Evaluation of Reinforcing Steel in Prestressed Concrete Bridge Members." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1352760825.
Повний текст джерелаZaïbi, Ghada. "Sécurisation par dynamiques chaotiques des réseaux locaux sans fil au niveau de la couche MAC." Phd thesis, Toulouse 2, 2012. http://tel.archives-ouvertes.fr/tel-00867469.
Повний текст джерелаFuligni, Matteo. "PEDOT:PSS-based conductive Textile for simultaneous detection of sweat analytes." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21204/.
Повний текст джерелаHeinke, Simon, and Marcus Åberg. "Implementering av maskinginlärningsmodeller för detektering av ett objekt baserad på endimensionell elektromagnetisk strålningsdata." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280887.
Повний текст джерелаKliniska studier är experiment eller observationer av en patients reaktion på olika typer av medicinsk vård för behandling sjukdomar. Sådana studier är tungt reglerade och behöver uppnå en viss kvalitésstandard och klinisk följsamhet är en avgörande faktor för en studies framgång. Trots det har det historiskt varit svårt att systematiskt mäta och förstå en patients följsamhet av en medicinsk ordination, primärt på grund av brist av användbara verktyg. En ny typ av verktyg är en digital pillerbox som försörjer piller till deltagare i kliniska studier. Denna studie undersöker implementation av två bevakade maskininlärningsmodeller för detektion om ett objekt (ett piller) befinner sig i ett slutet fack baserad på elektromagnetisk strålning från en närhetssensor. Support Vector Machine (SVM) och Random Forest (RF) utvärderades på ett dataset av N=1 485 observationer utgjort av fem klasser: fyra piller och ’inget piller’. RF presterar bäst med 98,0% i träffsäkerhet och 98,0% i viktad medelprecision. SVM fick 97,3% träffsäkerhet och 97,6% viktad medelprecision. Bäst prestation uppnåddes vid N=1 000 för RF och N=1 100 för SVM. Slutsatsen var att en hög träffsäkerhet och precision kan uppnås genom antingen RF eller SVM. Klassificeringsmodellen förstärker en digital pillerbox värdeerbjudande och kan hjälpa kliniska studier att uppnå högre datakvalité. Däremot, för klassificeringsmodellen ska bidra med faktiskt ekonomiskt värde, behöver digitala pillerboxar vara en vedertagen praxis.
Průdek, Ctirad. "Měřič krevního tlaku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218647.
Повний текст джерелаNatarajan, Vishwanath. "Self-healing RF SoCs: low cost built-in test and control driven simultaneous tuning of multiple performance metrics." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37165.
Повний текст джерелаPapenburg, Jens Gerrit. "Hörgeräte." Doctoral thesis, Humboldt-Universität zu Berlin, Philosophische Fakultät III, 2012. http://dx.doi.org/10.18452/16485.
Повний текст джерелаThe devices by which music is listened to in the age of technological (re-)production have changed over and over again. These devices must be imperceptible to the ear. Only then can music be heard. Nonetheless – this is the claim of the thesis – these devices organize hearing and are agents of a cultivation and technization of perception. Based on two case studies from the history of rock and pop music, this thesis reveals how such devices constitute not only the listener but also the music which is listened to. Through listening technologies new listening practices emerge and the corporality of the listener is newly defined. The adaptation of sound to specific listening technologies can be analysed during the mastering process, the last step in technological music production. The devices by which music is listened to are thus neither simple technologies of reproduction nor mere electrotechnical artefacts. Rather, they are assemblages of sound, corporality, and technology. In this thesis these assemblages are called “Hörgeräte” (listening devices). The listening devices of rock and pop music target – like medical-technical “Hörgeräte” (hearing aids) – the materiality of perception. Contrary to medical technologies, however, listening devices do not function as prostheses, which are calibrated according to medical industry standards. Instead, they contain excesses – of seriality and repetition – and escalations – of amplitude and high and low frequencies. The thesis is arranged in three chapters. In the first chapter I situate the main argument of the thesis within discourses of musicology, media and cultural studies, and develop my own terminology. Chapters two and three deal with case studies. In chapter two I investigate jukebox listening in 1950s rock’n’roll culture, whilst in chapter three I explore sound system listening in disco and club culture from the 1970s to the 1990s. The terminology developed in chapter one enables a comparison of the case studies.
Ferro, Gil de Castro. "Towards Out-of-the-Box Wireless Sensor Networks." Master's thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/82324.
Повний текст джерелаFerro, Gil de Castro. "Towards Out-of-the-Box Wireless Sensor Networks." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/82324.
Повний текст джерелаNeto, Edgard Quirino dos Santos. "Towards Out-of-the-Box Programming of Wireless Sensor Networks." Master's thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/76105.
Повний текст джерелаNeto, Edgard Quirino dos Santos. "Towards Out-of-the-Box Programming of Wireless Sensor Networks." Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/76105.
Повний текст джерелаLima, David Manuel Cartaxo. "Integração Sensorial para o diagnóstico de Transformadores de Distribuição (MT/BT) de Energia Eléctrica." Master's thesis, 2018. http://hdl.handle.net/10316/86149.
Повний текст джерелаEsta dissertação teve como intuito o desenvolvimento de uma unidade multissensorial para a monitorização remota de transformadores de distribuição em redes elétricas, tendo em vista o suporte à sua manutenção prescritiva. Esta unidade visa promover, simultaneamente, o prolongamento do tempo de vida útil destes equipamentos e a melhoria da qualidade do serviço prestado.As variáveis relevantes e os eventos de interesse na caracterização do estado de funcionamento dos transformadores são assim apresentados, bem como as metodologias e tecnologias usadas no dispositivo desenvolvido para a sua monitorização.Os fatores mais importantes e distintos deste dispositivo são o seu carácter não intrusivo e a sua total ausência de cablagem, quer de comunicação, quer de alimentação em potência. Assim, para a alimentação, optou-se por um sistema de captação de energia do diferencial térmico permanente entre o transformador e o ar envolvente. Deste modo, foram realizados testes para a seleção e validação dos módulos termoelétricos mais adequados.Quanto à comunicação, é devidamente justificada a opção pela tecnologia Bluetooth Low Energy, suportada num módulo integrado de comunicação e processamento.O sistema encontra-se, neste momento, em fase de prototipagem industrial, assim permitindo a realização de uma bateria de testes finais em condições reais. Estes terão lugar em laboratórios altamente diferenciados, em instituições académicas e industriais.Palavras-Chave: IIoT, Sensor Inteligente, Captação de Energia, Transformadores de Distribuição, Redes Elétricas Inteligentes, Diagnóstico Automático
The primary objective of the present work consists in the design and development of a smart multi-sensor for the remote monitoring of distribution transformers in power grids, in view of supporting their prescriptive maintenance. This sensor simultaneously promotes the extension of the equipment’s life span and the improvement in the respective quality of the service.The relevant variables and the events of interest to the characterization of the transformers’ operating status are presented, as well as the methods and technologies used for the device operation.This device’s most important and distinctive features are their non-intrusive and wireless character, requiring neither communication nor power supply cabling. Thus, in what regards the power unit, the option consists of energy harvesting from the permanent temperature differential between a transformer and the surrounding air. Accordingly, tests were carried out in order to select and validate the most appropriate thermoelectric modules.Concerning communication, an option for Bluetooth Low Energy is discussed, which is duly supported by an integrated module encompassing both communication and processing capabilities.The system is, at the present time, in a stage of industrial prototyping, thus allowing a final testbed to be carried out in realistic conditions. This will take place both in industrial and academic institutions.Keywords: IIoT, Smart Sensors, Energy Harvesting, Distribution Transformers, Smart Grids, Automatic Diagnosis
Ko, Po-ping, and 柯博斌. "An embedded-system case study on implementing Raspberry Pi_based Sensor box." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/93636052592818958007.
Повний текст джерела國立臺灣科技大學
自動化及控制研究所
102
The embedded systems have low energy-consuming and long-term stable operation with relative low-cost system architecture. To miniaturize the existing robot SPA (Sense, Plan, Act) model to work in a card-size board as cost-effective micro-architecture is our application goal of sensor box. A STTA-Loop microstructure is well defined as the loop of Sense, Trigger, Transport and Actuator states, and then makes critical sensing data easily and continuously send to a cloud site possible. Our study has used Raspberry Pi system board to implement a sensor box and has made good use of Python language as development tool to carry out two case studies. A conventional waterfall model is presented by 7 major design steps, that are mostly illustrated by UML model diagrams to describe the interactive behaviors and states of system board and its attached GPIO devices. Two case studies have been used to demonstrate the I/O functions of sensor box with finger pulse data sensed on sudden cold (or hot) environment and ultrasonic wave effects on distances. The sensors can get the real floating data within the assigned temperature range, and use a buzzer and four 8x8 dot matrix modules to indicate the output status. This system would take a proper GMAIL-notification action for exceptional filtered data. Our study made a data-sent-out and store-and-browse implementation to interact with ThingSpeak cloud platform by short python code with triggering thresholds UI and simple API call .
Katare, Dewant. "Exploration of Deep Learning Applications on An Autonomous Embedded Platform (Bluebox 2.0)." Thesis, 2019. http://hdl.handle.net/1805/21462.
Повний текст джерелаAn Autonomous vehicle depends on the combination of latest technology or the ADAS safety features such as Adaptive cruise control (ACC), Autonomous Emergency Braking (AEB), Automatic Parking, Blind Spot Monitor, Forward Collision Warning or Avoidance (FCW or FCA), Lane Departure Warning. The current trend follows incorporation of these technologies using the Artificial neural network or Deep neural network, as an imitation of the traditionally used algorithms. Recent research in the field of deep learning and development of competent processors for autonomous or self-driving car have shown amplitude of prospect, but there are many complexities for hardware deployment because of limited resources such as memory, computational power, and energy. Deployment of several mentioned ADAS safety feature using multiple sensors and individual processors, increases the integration complexity and also results in the distribution of the system, which is very pivotal for autonomous vehicles. This thesis attempts to tackle two important adas safety feature: Forward collision Warning, and Object Detection using the machine learning and Deep Neural Networks and there deployment in the autonomous embedded platform. 1. A machine learning based approach for the forward collision warning system in an autonomous vehicle. 2. 3-D object detection using Lidar and Camera which is primarily based on Lidar Point Clouds. The proposed forward collision warning model is based on the forward facing automotive radar providing the sensed input values such as acceleration, velocity and separation distance to a classifier algorithm which on the basis of supervised learning model, alerts the driver of possible collision. Decision Tress, Linear Regression, Support Vector Machine, Stochastic Gradient Descent, and a Fully Connected Neural Network is used for the prediction purpose. The second proposed methods uses object detection architecture, which combines the 2D object detectors and a contemporary 3D deep learning techniques. For this approach, the 2D object detectors is used first, which proposes a 2D bounding box on the images or video frames. Additionally a 3D object detection technique is used where the point clouds are instance segmented and based on raw point clouds density a 3D bounding box is predicted across the previously segmented objects.
Santos, Ricardo Alexandre Caseiro dos. "Hardware/Software interface for enhanced remote control of Android set-top-box." Master's thesis, 2015. http://hdl.handle.net/10400.8/1554.
Повний текст джерелаLiu, Yan-Liang, and 劉衍良. "Investigation of the Sensing Behaviors and Interacting Forces of Conducting Polypyrrole as a Gas Sensor with BTEX Vapors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/13346266584938806709.
Повний текст джерела國立雲林科技大學
工業化學與災害防治研究所碩士班
90
Polypyrrole(PPy) films were prepared electrochemically(PPy-ClO4) and chemically(PPyCl) to detect BTEX(benzene, toluene, ethylbenzene, and xylene) compounds in their vapor phases. Three isomers of xylene, i.e. ortho-(o-), meta-(m-), and para-(p-), were also investigated for comparison. The adsorption equilibrium constants, Km, were determined according to the proposed sorption model. The measured Km for BTEX molecules adsorbed onto PPy-ClO4 and PPyCl layer showed an order in magnitude as follows: PPy-ClO4:p-xylene>ethylbenzene>o-xylene>m-xylene>toluene PPyCl :o-xylene>m-xylene>p-xylene>ethylbenzene>toluene>benzene A further study of affinity between the PPy film and BTEX was carried out by a method of Inverse Gas Chromatograph(IGC). From the IGC result, it was found that the measured retention volume of BTEX vapor correlated well with the values of Km. The adsorption free energy DGa, split into dispersive term, DGad, and specific interaction term, DGas, for BTEX molecules adsorbed onto PPyCl surface, was determined and was used to interpret the sensing responses. On the other hand, The surface free energies of the chemically synthesized conducting polypyrrole(PPyCl), were also measured by IGC. The dispersive component of the surface tension (γsd) of PPyCl is 74.73 mJ/m2 at 443K, showing that the PPyCl is a high-surface energy material compared with the other conventional polymers. The interaction forces were analyzed in details by a method of linear solvation energy relationships(LSER), by which the surface of the polypyrrrole was found to exhibit a basic nature.
Baasch, Gaby. "Identification of thermal building properties using gray box and deep learning methods." Thesis, 2020. http://hdl.handle.net/1828/12585.
Повний текст джерелаGraduate
(5930405), Jongho Won. "Security techniques for drones." Thesis, 2019.
Знайти повний текст джерелаBadari, Narayana A. R. "Influence of Electric Field on the Global and Local Structure in the Ferroelectric Ceramic Na1/2Bi1/2TiO3 and its Solid Solutions with BaTiO3 and K1/2Bi1/2TiO3." Thesis, 2015. http://etd.iisc.ernet.in/2005/3966.
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