Monday, September 15, 2014

 

 



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rss_1.0 Clasificación por Disciplina

Nomenclatura Unesco > (22) Física > (2203) Electrónica
(2203.01) Circuitos (2203.02) Elementos de circuitos
(2203.03) Válvulas electrónicas (2203.04) Microscopía electrónica
(2203.05) Estados electrónicos (2203.06) Transporte de electrones
(2203.07) Circuitos integrados (2203.08) Fotoelectricidad
(2203.09) Piezoelectricidad (2203.99) Otras (especificar)

Categorías relacionadas:
(3307) Tecnología electrónica

Mostrando recursos 1 - 20 de 181,762

1. Implementing electronic health records in hospitals: a systematic literature review - Boonstra, Albert; Versluis, Arie; Vos, Janita F J

2. High-Fidelity Flash Lidar Model Development - Amzajerdian, Farzin; Hines, Glenn D.; Pierrottet, Diego F.
NASA's Autonomous Landing and Hazard Avoidance Technologies (ALHAT) project is currently developing the critical technologies to safely and precisely navigate and land crew, cargo and robotic spacecraft vehicles on and around planetary bodies. One key element of this project is a high-fidelity Flash Lidar sensor that can generate three-dimensional (3-D) images of the planetary surface. These images are processed with hazard detection and avoidance and hazard relative navigation algorithms, and then are subsequently used by the Guidance, Navigation and Control subsystem to generate an optimal navigation solution. A complex, high-fidelity model of the Flash Lidar was developed in order to...

3. Unidad de control sobre los parámetros de interés en la gestión energética de una estación de esquí - Zarzoso Corull, Albert
El següent projecte mostra el disseny, la selecció de components electrònicsi eines de software, utilitzades per programar, l’ adquisició de dades queens poden interessar en una estació d’esquí i així, conseqüentment tenir uncontrol automatitzat dels actuadors directes com són els motors delstelecadires o compressors i bombes per a la producció de neu artificial.Aportant d’aquesta manera una solució econòmica, amb eficiènciaenergètica i amb una optimització de les instal·lacions.Es realitzen mesures sobre les variables, com la velocitat del vent, el pes dela càrrega de persones que van sobre els telecadires, i de temperatura ihumitat.Mitjançant el microcontrolador PIC 18F4550, es fa la recollida...

4. Design and performance analysis of switched beam series-fed patch antenna array for 60GHz WPAN Applications - Syeda, Rabia Zainab
This project gives a detailed study of the Design and Performance analysis of series fed patch antenna array for 60 GHz system applications. The patch array designed in this project will act as an active element and can be used as the feed antenna of the dielectric flat lens antenna which is highly directive at 60 GHz. CPW (Coplanar Waveguide) is used as the feeding technique of the antenna array because it has lower transmission loss, lower profile especially on high frequency band. The purpose of the array is to perform the beam scanning with the shift in the frequency...

5. Estudi i aplicació de filtres i efectes passius en guitarres electrificades - Manera Escalero, Rafel
Aquest projecte consisteix en l’estudi i aplicació del diferents filtres i efecteselectrònics aplicables a una guitarra elèctrica. Les guitarres elèctriques estandotades de circuits passius, per això tot el disseny és realitzat a based’electrònica passiva. Finalment, es realitza un prototip sobre el cos d’unaguitarra elèctrica.

6. Experimental evaluation of a dynamic PCE-based regenerator-efficient IA-RWA algorithm in translucent WSON - Castro Casales, Alberto; Martínez, Ricardo; Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Muñoz González, Raul; Comellas Colomé, Jaume
We devise a novel dynamic PCE-based impairment-aware RWA algorithm in translucent GMPLS WSON that minimizes regenerator usage. Experimental evaluation carried out on the Open GMPLS/PCE control plane of CTTC ADRENALINE test-bed shows that significant improvements (>340%) are attained in terms of the offered traffic load.

7. Design of green optical networks with signal quality guarantee - Cavdar, Cicek; Ruiz Ramírez, Marc; Monti, Paolo; Velasco Esteban, Luis Domingo; Wosinska, Lena
Energy consumption of communication networks is growing very fast due to the rapidly increasing traffic demand. Consequently, design of green communication networks gained a lot of attention. In this paper we focus on optical Wavelength Division Multiplexing (WDM) networks, able to support this growing traffic demand. Several energy-aware routing and wavelength assignment (EA-RWA) techniques have been proposed for WDM networks in order to minimize their operational cost. These techniques aim at minimizing the number of active links by packing the traffic as much as possible, thus avoiding the use of lightly loaded links. As a result, EA-RWA techniques may lead...

8. Virtual network embedding in optical infrastructures - Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore
Optical network virtualisation has recently become a hot topic among the research community due to its potential to enable the shaping of the Infrastructure as a Service (IaaS) concept. A major challenge that arises of paramount importance when virtualising a network is the so called Virtual Network (VN) embedding problem. While this problem has been extensively treated for electrical networks, there is very little work regarding Virtual Optical Network (VONs) embedding. This paper addresses the VON embedding problem, giving an insight about the potential challenges and presenting solutions that allow to optimally solving this problem in dynamic network scenarios.

9. Experimental comparison of impairment-aware RWA algorithms in a GMPLS-controlled dynamic optical network - Angelou, Marianna; Agraz Bujan, Fernando; Kokkinos, Panagiotis; Perelló Muntan, Jordi; Azodolmolky, Siamak; Varvarigos, Emmanouel; Spadaro, Salvatore; Tomkos, Ioannis
The European research project DICONET proposed and implemented a multi-plane impairment-aware solution for flexible, robust and cost-effective core optical networks. The vision of DICONET was realized via a set of cross-layer optimization algorithms designed to serve the network during planning and operation. The cross-layer modules were incorporated in a common software platform forming a planning and operation tool that takes into account physical-layer impairments in the decision making. The overall solution relies on a GMPLS-based control plane that was extended to disseminate the physical layer information required by the cross-layer modules. One of the key activities in DICONET concerns the...

10. Aprendizaje cooperativo distribuido en base a Web 2.0 - Santos Boada, Germán; Domingo Pascual, Jordi; Solé Pareta, Josep; Fumero, Antonio; Quemada Vives, Juan; Salvachúa, Joaquín; Casares Giner, Vicente; Vidal Català, José Ramón
El modelo educativo que propugna la implantación del Espacio Europeo de Enseñanza Superior (EEES) propone desplazar el centro de gravedad del proceso de aprendizaje del profesor al estudiante, haciendo un especial hincapié en el trabajo grupal y colaborativo entre estudiantes y con los profesores. La asignatura IBA/ING (Internet de Banda Ancha/Internet Nueva Generación) de los estudios de Ingeniería de Telecomunicación se imparte como una experiencia de innovación educativa en la docencia realizada entre las Universidades Politécnicas de Cataluña (UPC), Madrid (UPM) y Valencia (UPV) con utilización intensiva de herramientas web 2.0 de colaboración a través de Internet. La metodología docente...

11. MODEST: a model for energy estimation under spatio-temporal variability - Ganapathy, Shrikanth; Canal Corretger, Ramon; González Colás, Antonio María; Rubio Sola, Jose Antonio
Estimation of static and dynamic energy of caches is critical for high-performance low-power designs. Commercial CAD tools performing energy estimation statically are not aware of the changing operating and environmental conditions which makes the problem of energy estimation more dynamic in nature. It is worsened by process induced variations of low level parameters like threshold voltage and channel length. In this paper we present MODEST, a proposal for estimating the static and dynamic energy of caches taking into account spatial variations of physical parameters, temporal changes of supply voltage and environmental factors like temperature. It can be used to estimate...

12. Lightpath fragmentation for efficient spectrum utilization in dynamic elastic optical networks - Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore
The spectrum-sliced elastic optical path network (SLICE) architecture has been presented as an efficient solution for flexible bandwidth allocation in optical networks. An homologous problem to the classical Routing and Wavelength Assignment (RWA) arises in such an architecture, called Routing and Spectrum Assignment (RSA). Imposed by current transmission technologies enabling the elastic optical network concept, the spectrum contiguity constraint must be ensured in the RSA problem, meaning that the bandwidth requested by any connection must be allocated over a contiguous portion of the spectrum along the path between source and destination nodes. In a dynamic network scenario, where incoming connections...

13. Optimal allocation of virtual optical networks for the future internet - Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore; Garcia Espin, Joan Antoni; Ferrer Riera, Jordi; Figuerola, Sergi
Optical network infrastructures can be partitioned into multiple parallel, dedicated virtual networks for a physical infrastructure sharing purpose. However, different transport technologies may impact in both the amount and the characteristics of the different virtual instances that can be built on top of a single physical infrastructure. To analyse the impact of the transport technology in this regard, we present exact Integer Linear Programming (ILP) formulations that address the off-line problem of optimally allocate a set of virtual networks in two kind of substrates: wavelength switching and spectrum switching. Both formulations serve the purpose to provide opaque transport services from...

14. Circuit propagation delay estimation through multivariate regression-based modeling under spatio-temporal variability - Ganapathy, Shrikanth; Canal Corretger, Ramon; González Colás, Antonio María; Rubio Sola, Jose Antonio
With every process generation, the problem of variability in physical parameters and environmental conditions poses a great challenge to the design of fast and reliable circuits. Propagation delays which decide circuit performance are likely to suffer the most from this phenomena. While Statistical static timing analysis (SSTA) is used extensively for this purpose, it does not account for dynamic conditions during operation. In this paper, we present a multivariate regression based technique that computes the propagation delay of circuits subject to manufacturing process variations in the presence of temporal variations like temperature. It can be used to predict the dynamic...

15. Effects for augmented reality audio headsets - Martí i Rabadán, Miquel
[ANGLÈS] Augmented reality is a real-time combination of real and virtual worlds. In augmented reality audio (ARA) real surrounding sounds are mixed with virtual sound sources. In this bachelor’s degree thesis a digital, real-time hear-through system (HTS) is implemented for the acoustical transparency of an ARA headset. It is achieved by adding back the sounds that have been attenuated by the isolation characteristics of the headphone itself. The surrounding sounds are recorded on both ears by means of two microphones, equalised in a digital signal processor (DSP) according to acoustical measurements of both isolation curves and frequency response of the...

16. Estudio de viabilidad de una planta de producción de grafeno - Mayora Curzio, Carlos Alfredo
Ante el reciente descubrimiento del grafeno, un nuevo material con propiedades de gran interés tecnológico, la industria busca optimizar sus mecanismos de producción con el objetivo de abordar un mercado para el cual se prevé un gran crecimiento. La síntesis de grafeno puede llevarse a cabo mediante diversos procedimientos, si bien para cada uno deellos se pueden advertir diferencias respecto la calidad del producto final. Entre talesprocesos, se distinguen dos grupos: aquellos que parten de átomos de carbono para sintetizar grafeno (métodos bottom-up), o aquellos que parten de estructuras más complejas (métodos top-down).Este proyecto, a partir de una investigación bibliográfica...

17. BUMBLEBEEXB3 - Beltrán Guerrero, Diana; Basañez Villaluenga, Luis
Postprint (published version)

18. Microsoft Kinect - Basañez Villaluenga, Luis; Beltrán Guerrero, Diana
Postprint (published version)

19. Cross-stratum orchestration and flexgrid optical networks for datacenter federations - Velasco Esteban, Luis Domingo; Asensio, Adrià; Castro Casales, Alberto; Berral, Josep; Carrera Pérez, David; López, Víctor; Fernández Palacios, Juan Pedro
Current inter-data-center connections are configured as static big fat pipes, which entails large bit rate over-provisioning and thus high operational costs for DC operators. On the other hand, network operators cannot share such connections between customers, because DC traffic varies greatly over time. Those connections are used to perform virtual machine migration and database synchronization among federated DCs, allowing elastic DC operations. To improve resource utilization and save costs, dynamic inter-DC connectivity is currently being targeted from a research point of view and in standardization form. In this article, we show that dynamic connectivity is not enough to guarantee elastic...

20. On the performance of flexgrid-based optical networks - Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Pedrola Escribà, Òscar; Castro Casales, Alberto; Klinkowski, Miroslaw; Careglio, Davide; Comellas Colomé, Jaume
The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed rigid-grid networks in matching the client layer requirements. Such an issue results in the deployment of large-size, expensive and power-consuming IP/MPLS layers to perform the required grooming/aggregation functionality. To deal with this problem, the emerging flexgrid technology, allowing for reduced size frequency grids, usually referred to as frequency slot, has recently attracted great attention among network operators, component and equipment suppliers, and the research community. In this paper, we report the main contributions performed in the context of EU STRONGEST project regarding flexgrid...

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