Mostrando recursos 1 - 20 de 15.812

  1. Application of an E-Tongue to the Analysis of Monovarietal and Blends of White Wines

    Gutiérrez, Manuel; Llobera, Andreu; Ipatov, Andrey; Vila-Planas, Jordi; Mínguez, Santiago; Demming, Stefanie; Büttgenbach, Stephanus; Capdevila, Fina; Domingo, Carme; Jiménez-Jorquera, Cecilia
    This work presents a multiparametric system capable of characterizing and classifying white wines according to the grape variety and geographical origin. Besides, it quantifies specific parameters of interest for quality control in wine. The system, known as a hybrid electronic tongue, consists of an array of electrochemical microsensors—six ISFET based sensors, a conductivity sensor, a redox potential sensor and two amperometric electrodes, a gold microelectrode and a microelectrode for sensing electrochemical oxygen demand—and a miniaturized optofluidic system. The test sample set comprised eighteen Catalan monovarietal white wines from four different grape varieties, two Croatian monovarietal white wines and seven bi-...

  2. Sistema de control electrónico de estabilidad para estudiar datos de interés estratégico sobre cultivos

    Peretti, Gastón; Gallina, Sergio Hilario; Felissia, Sergio Francisco; Bernardi, Emanuel; Pipino, Hugo; Depetris, Leonardo; Cervetto, Mayco; Depetris, Lorenzo
    En este proyecto se propone desarrollar un sistema de control electrónico de estabilidad factible de ser montado sobre un aeromodelo, que nos permita obtener el enfoque y la resolución necesaria para capturar imágenes de muy alta resolución y luego mediante las mismas, extraer datos de interés estratégico del cultivo como tipos de cultivos, rendimientos, estimación de pérdidas, cantidad de superficies inundadas, necesidades hídricas (cantidad de agua que necesitan), etc. El sistena será montado sobre dos tipos de aeromodelos (cuadricóptero y un planeador). El motivo de montar el sistema sobre distintos aeromodelos, es analizar y evaluar el comportamiento del sistema de...

  3. Procesamiento de señales vibro-acústicas: análisis de casos de estudio, modelación, prototipado y experimentación

    Friedrich, Guillermo Rodolfo; Girón, Pablo; Reggiani, Guillermo; Azurro, Adrián; Coppo, Ricardo; Sequeira, Martín; Baldini, Patricia Noemí; Bambill, Héctor; Cerda, Ezequiel; Cofre, Lorena; Velasquez, Gabriela
    Los niveles excesivos de ruido y vibraciones presentan una gran variedad de efectos nocivos para el hombre y su entorno. Podría decirse, en forma general, que hay confort auditivo hasta los 65 dBA; niveles superiores presentan molestia e incluso, en función de las dosis de tiempo, pueden causar daño auditivo. El Control Activo de Ruido y/o Vibraciones (CAR/V) es la transformación favorable del campo vibroacústico empleando medios electrónicos, sensores y actuadores. El trabajo a desarrollar incluye una profundización en el conocimiento del estado del arte y las tecnologías vinculadas al tema, mediante el relevamiento y estudio de bibliografía y publicaciones....

  4. Implementaciones de GNSS RTK en sistemas embebidos autónomos

    Moyano, José Hipólito; Cenci, Karina M.; Ardenghi, Jorge Raúl
    Esta línea de investigación tiene como objetivo general analizar y comparar diferentes tecnologías existentes en el área de Global Navigation Satellite Systems (GNSS), buscando destacar las ventajas y desventajas ofrecidas. Como objetivo particular, se buscará realizar el análisis y el desarrollo de GNSS de alta precisión, con dispositivos electrónicos de bajo costo, valiéndose de la biblioteca Real Time Kinematic Library (RTKLIB), la cual implementa algoritmos de Real Time Kinematic (RTK) para cualquier dispositivo embebido.

  5. Analysis of similarity among arterial blood pressure waveforms

    Kianimajd, Adell
    Dissertação de mestrado, Engenharia Electrónica e Telecomunicações, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2017

  6. Polímeros orgánicos y sus aplicaciones en procesos sostenibles

    Gómez Gutiérrez, Mónica
    A partir de la Revolución Industrial, la ciencia y la tecnología han cobrado cada día más y más importancia. En concreto, las ingenierías han ido desarrollando nuevos procesos y productos que han sido instalados en la vida cotidiana de todo ser humano. Afortunadamente, la evolución de este campo no se ha detenido, y lucha por crear y mejorar la calidad de vida de las personas, de una forma legal, económica, ética, respetuosa con el medio ambiente y sostenible. Entre otras, la ingeniería química ha florecido en las últimas décadas como una necesidad, y es la posibilidad de su estudio lo...

  7. Fabrication of Epitaxial Fe3O4 Film on a Si(111) Substrate

    Takahashi, Nozomi; Huminiuc, Teodor; Yamamoto, Yuta; Yanase, Takashi; Shimada, Toshihiro; Hirohata, Atsufumi; Nagahama, Taro
    The application of magnetic oxides in spintronics has recently attracted much attention. The epitaxial growth of magnetic oxide on Si could be the first step of new functional spintronics devices with semiconductors. However, epitaxial spinel ferrite films are generally grown on oxide substrates, not on semiconductors. To combine oxide spintronics and semiconductor technology, we fabricated Fe3O4 films through epitaxial growth on a Si(111) substrate by inserting a gamma-Al2O3 buffer layer. Both of gamma-Al2O3 and Fe3O4 layer grew epitaxially on Si and the films exhibited the magnetic and electronic properties as same as bulk. Furthermore, we also found the buffer layer...

  8. BendFlip: Examining Input Techniques for Electronic Book Readers with Flexible Form Factors

    Wightman, Doug; Ginn, Tim; Vertegaal, Roel
    Part 1: Long and Short Papers

  9. El hombre y sus parásitos : luces y sombras de una historia interminable [Recurso electrónico] / Carmen del Águila de la Puente.

    Águila de la Puente, Carmen del.
    Universidad CEU San Pablo, [lección magistral] apertura curso académico 2017-2018, [37 p.]

  10. Application of 3D Printing for Smart Objects with Embedded Electronic Sensors and Systems

    Ota, Hiroki; Emaminejad, Sam; Gao, Yuji; Zhao, Allan; Wu, Eric; Challa, Samyuktha; Chen, Kevin; Fahad, Hossain M.; Jha, Amit K.; Kiriya, Daisuke; Gao, Wei; Shiraki, Hiroshi; Morioka, Kazuhito; Ferguson, Adam R.; Healy, Kevin E.; Davis, Ronald W.; Javey, Ali
    Applications of a 3D printing process are presented. This process integrates liquid-state printed components and interconnects with IC chips in all three dimensions, various orientations, and multiple printing layers to deliver personalized system-level functionalities. As an example application, a form-fitting glove is demonstrated with embedded programmable heater, temperature sensor, and the associated control electronics for thermotherapeutic treatment.

  11. Printed Carbon Nanotube Electronics and Sensor Systems

    Chen, Kevin; Gao, Wei; Emaminejad, Sam; Kiriya, Daisuke; Ota, Hiroki; Nyein, Hnin Yin Yin; Takei, Kuniharu; Javey, Ali
    Printing technologies offer large-area, high-throughput production capabilities for electronics and sensors on mechanically flexible substrates that can conformally cover different surfaces. These capabilities enable a wide range of new applications such as low-cost disposable electronics for health monitoring and wearables, extremely large format electronic displays, interactive wallpapers, and sensing arrays. Solution-processed carbon nanotubes have been shown to be a promising candidate for such printing processes, offering stable devices with high performance. Here, recent progress made in printed carbon nanotube electronics is discussed in terms of materials, processing, devices, and applications. Research challenges and opportunities moving forward from processing and system-level...

  12. Growth of Epitaxial ZnSn_xGe_(1−x)N_2 Alloys by MBE

    Shing, Amanda M.; Tolstova, Yulia; Lewis, Nathan S.; Atwater, Harry A.
    ZnSn_xGe_(1−x)N_2 alloys are chemically miscible semiconductor compounds with potential application as earth-abundant alternatives to In_xGa_(1−x)N. Preparation of ZnSn_xGe_(1−x)N_2 thin-films by reactive RF sputter deposition yield low-mobility, nanocrystalline films. In contrast, the growth of ZnSn_xGe_(1−x)N_2 films by molecular-beam epitaxy (MBE) on c-plane sapphire and GaN templates is described herein. Epitaxial films exhibited 3D growth on sapphire and 2D single-crystal quality on GaN, exhibiting substantial improvements in epitaxy and crystallinity relative to nanocrystalline sputtered films. Films on sapphire were n-type with electronic mobilities as high as 18 cm^2 V^(−1) s^(−1), an order of magnitude greater than the 2 cm^2 V^(−1) s^(−1) average mobility observed in this...

  13. A Study of Realtime Summarization Metrics

    Ekstrand-Abueg, Matthew; McCreadie, Richard; Pavlu, Virgil; Diaz, Fernando
    Unexpected news events, such as natural disasters or other human tragedies, create a large volume of dynamic text data from official news media as well as less formal social media. Automatic real-time text summarization has become an important tool for quickly transforming this overabundance of text into clear, useful information for end-users including affected individuals, crisis responders, and interested third parties. Despite the importance of real-time summarization systems, their evaluation is not well understood as classic methods for text summarization are inappropriate for real-time and streaming conditions. The TREC 2013-2015 Temporal Summarization (TREC-TS) track was one of the first evaluation campaigns...

  14. A Comparison of Nuggets and Clusters for Evaluating Timeline Summaries

    Baruah, Gaurav; Mccreadie, Richard; Lin, Jimmy
    There is growing interest in systems that generate timeline summaries by filtering high-volume streams of documents to retain only those that are relevant to a particular event or topic. Continued advances in algorithms and techniques for this task depend on standardized and reproducible evaluation methodologies for comparing systems. However, timeline summary evaluation is still in its infancy, with competing methodologies currently being explored in international evaluation forums such as TREC. One area of active exploration is how to explicitly represent the units of information that should appear in a 'good' summary. Currently, there are two main approaches, one based on...

  15. Analyzing Disproportionate Reaction via Comparative Multilingual Targeted Sentiment in Twitter

    Smith, Karin Sim; McCreadie, Richard; Macdonald, Craig; Ounis, Iadh
    Global events such as terrorist attacks are commented upon in social media, such as Twitter, in different languages and from different parts of the world. Most prior studies have focused on monolingual sentiment analysis, and therefore excluded an extensive proportion of the Twitter userbase. In this paper, we perform a multilingual comparative sentiment analysis study on the terrorist attack in Paris, during November 2015. In particular, we look at targeted sentiment, investigating opinions on specific entities, not simply the general sentiment of each tweet. Given the potentially inflammatory and polarizing effect that these types of tweets may have on attitudes,...

  16. Searching the Internet of Things

    Mccreadie, Richard; Albakour, Dyaa; Manotumruksa, Jarana; Macdonald, Craig; Ounis, Iadh
    In this chapter, we describe how real-world information needs can be better addressed by search engines through harnessing sensing infrastructures, including those from the Internet of Things (IoT). Indeed, the introduction of IoT sensors within the search engine provides more responsive/timely information than existing evidence sources, such as Web or social streams. For instance, by considering IoT sensor outputs such as real-time rain levels, a search engine can produce a more customised answer to queries such as "what is the current weather at JFK airport?". Furthermore, information needs such as "what is happenning near me?" (local event retrieval) can be...

  17. "A Performer-Centered Study of Narration: A Review Article", Review of Linda Dégh, Narratives in Society: A Performer-Centered Study of Narration

    Ben-Amos, Dan
    An Hungarian in America, Linda Dégh lives the ideal of a Malinowskian fieldworker. After immigrating to the United States and joining the faculty of the famous Folklore Institute at Indiana University in the 60s, she has become a participant in and an observer of American life, conducting research among native Midwesterners and Hungarian immigrants in towns like Bloomington, Evansville, Indiana, as well as the highly industrial Calumet Region, particularly in Gary, Indiana. Dégh arrived in the United States as a mature and accomplished scholar, after conducting extensive field research in her native Hungary, and winning the coveted Pitré Prize in...

  18. Fluorescent carborane-vinylstilbene functionalised octasilsesquioxanes: synthesis, structural, thermal and photophysical properties

    Cabrera González, Justo; Ferrer Ugalde, Albert; Bhattacharyya, Santanu; Chaari, Mahdi; Teixidor, Francesc; Gierschner, Johannes; Núñez Aguilera, Rosario
    A new set of four different fluorescent boron-rich hybrids based on an octasilsesquioxane core (T8) are presented herein. The syntheses have been carried out starting from styrene-containing ortho- and meta-carboranes and an adequately substituted octasilsesquixane derivative (p-BrStyrenylOS) via Heck coupling reaction. The carborane clusters are attached to the T8 core through para-substituted stilbene spacers, which act as the main electronic donor of the molecule and as a result are responsible for the photoluminescence properties of the hybrids. These have been assessed in DCM solution, concluding that the presence of the carborane clusters plays a key role in the increase of the fluorescence emission displayed by the hybrids. A comparative...

  19. Socio geographical patterns inferred from mobile phone records

    Herrera Yagüe, Carlos
    La ubicuidad de los registros de comunicación recolectados de forma automática y la dramática reducción de los costes asociados al almacenamiento y procesamiento de información, nos permiten comenzar a estudiar el comportamiento humano de una forma completamente nueva. En lugar de limitarnos a pequeños experimentos realizados a decenas o cientos de participantes durante lapsos de tiempo relativamente cortos, como ha ocurrido con la investigación en ciencias sociales o la planificación de transportes anterior a los últimos 15 años, hoy tenemos registros detallados de ciertos comportamientos para millones de personas durante años, con el interesante matiz de que los datos se...

  20. Development of a mechanical scanning device with high-frequency ultrasound transducer for ultrasonic capsule endoscopy

    Wang, Xingying; Seetohul, Vipin; Chen, Ruimin; Zhang, Zhiqiang; Qian, Ming; Shi, Zhehao; Yang, Ge; Mu, Peitian; Wang, Congzhi; Huang, Zhihong; Zhou, Qifa; Zheng, Hairong; Cochran, Sandy; Qiu, Weibao
    Wireless capsule endoscopy has opened a new era by enabling remote diagnostic assessment of the gastrointestinaltract in a painless procedure. Video capsule endoscopy is currently commercially available worldwide. However, it is limited to visualization of superficial tissue. Ultrasound (US) imaging is a complementary solution as it is capable of acquiring transmural information from the tissue wall. This paper presents a mechanical scanning device incorporating a high-frequency transducer specifically as a proof of concept for US capsule endoscopy (USCE), providing information that may usefully assist future research. A rotary solenoid-coil-based motor was employed to rotate the US transducer with sectional electronic...

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