Now showing items 5464-5483 of 5484

    What groups of factors do senior executives believe affect their use of executive information systems? 

    Cano Giner, Josep Lluís (Date of defense: 2013-02-18)

    In a highly competitive and turbulent environment, executives need more efficient ways to analyze their companies, markets and competitors. The aim is to help their organizations become more competitive and, as a result, ...

    Whispering gallery microresonator for second harmonic light generation 

    Domínguez Juárez, Jorge Luís (Date of defense: 2014-07-22)

    In recent years, it has been proposed that circular microresonators may become an important element in the core of many photonic devices. The high Q-factors seen in fused silica micro-spheres and micro-toroids for light ...

    White dwarf dynamical interactions 

    Aznar Siguan, Gabriela (Date of defense: 2015-04-30)

    Merging white dwarfs is a promising channel to trigger Type Ia supernovae, known as the double degenerate scenario. Supernovae are stellar explosions that radiate as much energy as any ordinary star is expected to emit ...

    Wideband cognitive radio: monitoring, detection and sparse noise subspace communication 

    Font Segura, Josep (Date of defense: 2014-07-24)

    We are surrounded by electronic devices that take advantage of wireless technologies, from our computer mice, which require little amounts of information, to our cellphones, which demand increasingly higher data rates. ...

    WIM-based modelling of traffic load scenarios for extreme load effects in long-span bridges 

    Wang, Xuejing (Date of defense: 2023-11-28)

    (English) During the lifetime of long-span bridges, the traffic conditions are affected by the surroundings and will typically vary and also unpredictably change. In this thesis, a prior site-specific traffic load spatial ...

    Wind-driven currents in the coastal and equatorial upwelling regions 

    Castellanos Ossa, Paola (Date of defense: 2012-11-12)

    During the last two decades the scientific community has recognised the importance of the tropical Atlantic Ocean and the upwelling regions on the Earth's climate. This recognition has opened new questions such as: ¿What ...

    Wireless multimedia sensor networks, security and key management 

    Almalkawi, Islam (Date of defense: 2013-07-23)

    Wireless Multimedia Sensor Networks (WMSNs) have emerged and shifted the focus from the typical scalar wireless sensor networks to networks with multimedia devices that are capable to retrieve video, audio, images, as well ...

    Wireless power transfer : fueling the dots 

    Bou Balust, Elisenda (Date of defense: 2017-07-17)

    Resonant Inductive Coupling Wireless Power Transfer (RIC-WPT) has been proven to provide very high power transfer efficiencies (above 80%) for moderate distances, and is hence foreseen as a key technology to enable wireless ...

    Wireless sensors embedded in high permittivity lossy media 

    González López, Giselle (Date of defense: 2021-06-29)

    The design of wireless sensors for operation embedded in a medium with high losses creates a series of additional constraints that should be taken into consideration at design stage to enhance sensor performance. In such ...

    Witnessing non-Markovian evolutions 

    De Santis, Dario (Date of defense: 2021-06-22)

    The formulation of quantum physics stands among the most revolutionary theories of the twentieth century. During the first decades of this century, many phenomena concerning the microscopic world were unexplained or had ...

    Wladimiro Acosta y la vivienda colectiva (1928 - 1935) : su aporte a la innovación arqueológica y tipológica en América Latina 

    Ranzini, Marcelo (Date of defense: 2015-07-21)

    VVladimiro Acosta (WA) was a Russian architect with centro-european modem studies. His moving to Latin America in 1928 he meant one of the most significant contributions to Argentinian architecture. Since his arrival until ...

    World-wide analysis and modelling of the ionospheric and plasmaspheric electron contents by means of radio occultations 

    Shao, Yixie (Date of defense: 2019-02-25)

    The research of this dissertation is studying the ionosphere by GPS radio occultation (RO) techniques. It is mainly divided into two parts. The first part focuses on the methodology in electron density profile retrievals ...

    WTEA : Millores de la metodologia per al desenvolupament d’auditories energètiques 

    García-Almiñana, Daniel (Date of defense: 2015-09-01)

    This PhD thesis shows the results of 10 years of energy audits for buildings as a proposal for a methodological improvement in the energy audit process itself. The main findings are referred to the three key points of any ...

    WWW.CIUDAD.CONSUMO.El impacto de las redes de consumo en la reorganización del espacio urbano contemporáneo del área metropolitana de Lisboa. 

    García Louro do Nascimento e Oliveira, Margarida Maria (Date of defense: 2005-04-19)

    Tanto las problemáticas de la actual urbanística metropolitana, así como su confrontación con las nuevas temáticas que caracterizan la ciudad contemporánea se han convertido en el principal campo de reflexión de la presente ...

    Xarxa ferroviària i sistema de ciutats 

    Álvarez Palau, Eduard (Date of defense: 2015-12-18)

    The relationship between the railway network and the city system has been the subject of numerous studies in recent decades. The railway has assumed great importance as a key element of transport infrastructure for the ...

    Xarxes neuronals per a la generació de dissenys en blocs 

    Bofill Soliguer, Pau (Date of defense: 1997-11-04)

    YAM^2: a multidimensional conceptual model 

    Abelló Gamazo, Alberto (Date of defense: 2002-04-26)

    ABRSTRACT<br/>This thesis proposes YAM^2, a multidimensional conceptual model for OLAP(On-Line Analytical Processing). It is defined as an extension of UML (Unified Modeling Language). The aim is to benefit from Object-Oriented ...

    Zero-thickness interface elements in petroleum geomechanics : sand production and hydraulic fracture 

    Garolera Vinent, Daniel (Date of defense: 2017-09-18)

    This thesis describes the extension of the Finite Element Method with zero-thickness interface elements (FEM+z) to 3D, large and complex problems in geomaterials, with special interest in petroleum geomechanics. This general ...

    Zero-touch service orchestration in 5G and beyond mobile networks 

    Dalgkitsis, Anestis (Date of defense: 2023-11-07)

    (English) The expeditious growth and development of Beyond-5G and 6G networks inaugurated a new sector in the research of cellular networking. Automation and scaling are now considered a necessity to cope with the anticipated ...

    Zipf extensions and their applications for modeling the degree sequences of real networks 

    Duarte-López, Ariel (Date of defense: 2021-02-05)

    The Zipf distribution, also known as discrete Pareto distribution, attracts considerable attention because it helps describe skewed data from many natural as well as man-made systems. Under the Zipf distribution, the ...