457,593 Works

Cooling High Heat Flux Micro-Electronic Systems using Refrigerants in High Aspect Ratio Multi-Microchannel Evaporators

Etienne Costa-Patry
Improving the energy efficiency of cooling systems can contribute to reduce the emission of greenhouse gases. Currently, most microelectronic applications are air-cooled. Switching to two-phase cooling systems would decrease power consumption and allow for the reuse of the extracted heat. For this type of application, multi-microchannel evaporators are thought to be well adapted. However, such devices have not been tested for a wide range of operating conditions, such that their thermal response to the high...
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Multidisciplinary Analysis of the Metabolic Shift to Lactate Consumption in CHO Cell Culture

Francesca Zagari
Mammalian cells represent the most widely used host system for the industrial production of recombinant therapeutic proteins. In order to increase productivity, chemically defined media are often used and optimized to provide the cells with the necessary nutrients. However, a deregulated cell metabolism is often observed in these culture conditions. In particular, carbon sources are fast and inefficiently consumed with a consequent accumulation of byproducts, mainly lactate and ammonia. Lactate, in particular, causes a decrease...
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Agency in Walking Humans Sensorimotor & [and] Cognitive Contributions to Bodily Self-Consciousness

Oliver Alan Kannape
Acting in our environment and experiencing ourselves as conscious agents are fundamental aspects of human selfhood. While large advances have been made with respect to understanding human sensorimotor control from an engineering approach, knowledge about its interaction with cognition and the conscious experience of movement, i.e. the sense of agency, is still speculative. In this thesis I have investigated these relationships by implementing a Virtual Reality platform, which allowed me to adapt agency paradigms previously...
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Development of Electrokinetically Based Two-Dimensional Separation Methodologies for Proteomic Studies

Mohammad Reza Pourhaghighi
Proteomic studies require analytical methods capable of separating, identifying and quantifying thousands of proteins. Consequently, developing separation methodologies with high resolving power necessary to separate complex protein samples prior to protein identification via mass spectrometry (MS) has become a major challenge in proteomic studies. It is now demonstrated that a single separation technique is unable to provide a peak capacity sufficient to resolve complex protein mixtures, therefore multidimensional separation methodologies have to be developed. In...
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Variability of the Rain Drop Size Distribution:Stochastic Simulation and Application to Telecommunication Microwave Links

Marc Schleiss
Precipitation is an important component of the Earth' water cycle and needs to be carefully monitored. Its large variability over a wide range of spatial and temporal scales must be taken into account. For example, hydrological models require accurate rainfall estimates at high spatial and temporal resolutions (e.g., 1 km and 5 min or higher). Obtaining accurate rainfall estimates at these scales is known to be difficult. So far, the only instruments capable of measuring...
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Epoxy-graphite Resistive Composites:Formulation, Characterization and Applications

Nathalie Serra
In this thesis, we proposed to study polymer-based thick-film resistors (TFRs) made of graphite particles dispersed in an epoxy matrix. Three main axes were investigated: formulation of the composites, characterization with the determination of electrical, mechanical and thermo-mechanical properties of the material, potential applications. Special care was first given to the formulation of the composite formed by an epoxy matrix in which graphite particles are dispersed, providing conductivity to the material. As application temperatures of...
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Fano Resonances in Plasmonic Nanostructures:Fundamentals, Numerical Modeling and Applications

Benjamin Gallinet
Surface plasmons are able to generate extremely strong and confined optical fields at a deep-subwavelength scale, far beyond the diffraction limit, and now play a central role in nanosciences. A proper combination of plasmonic nanostructures can support Fano resonances arising from the interference between a non-radiative mode and a continuum of radiative electromagnetic waves. Fano resonances are able to confine light more efficiently and are characterized by a steeper dispersion than conventional plasmon resonances, which...
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Selected Contributions on Multimedia Quality Evaluation

Francesca De Simone
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Multivariate Boosting with Look-Up Tables for Face Processing

Cosmin Atanasoaei
This thesis proposes a novel unified boosting framework. We apply this framework to the several face processing tasks, face detection, facial feature localisation, and pose classification, and use the same boosting algorithm and the same pool of features (local binary features). This is in contrast with the standard approaches that make use of a variety of features and models, for example AdaBoost, cascades of boosted classifiers and Active Appearance Models. The unified boosting framework covers...
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On the Cryptanalysis of Public-Key Cryptography

Joppe Willem Bos
Nowadays, the most popular public-key cryptosystems are based on either the integer factorization or the discrete logarithm problem. The feasibility of solving these mathematical problems in practice is studied and techniques are presented to speed-up the underlying arithmetic on parallel architectures. The fastest known approach to solve the discrete logarithm problem in groups of elliptic curves over finite fields is the Pollard rho method. The negation map can be used to speed up this calculation...
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Investigation of Sulfate Attack by Experimental and Thermodynamic Means

Wolfgang Kunther
This work investigates sulfate attack in complex sulfate environments by exposing different binder types to various sulfate solutions and comparing predicted phase and volume changes with experimental data. The most important aspects of this work can be grouped in three topics: The comparison of the predicted volume increase with the experimentally observed length changes. This part of the work shows that volume increase cannot be linked directly to the observed expansions. Additionally, the volume increase...
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Soudure par interdiffusion dans les systèmes Au-In et In-Ni:application à des composants microélectroniques

Léa Deillon
Hermiticity is an essential requirement of a MEMS package for a device to work properly. Hermeticity also must be preserved during the operations following packaging, during which the package bond should not remelt. Bonding temperature is limited however to avoid damaging the device. Solid-Liquid InterDiffusion (SLID) bonding is interesting in this context, because this process allows one to achieve bonds that are able to subsequently withstand higher temperatures than the temperature at which the bonding...
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Study of Topoisomerase-DNA Interaction Using Atomic Force Microscopy

Livan Bladimir Alonso Sarduy
The aim of this thesis was to explore the topoisomerase-DNA interactions using atomic force microscopy (AFM) in a liquid environment. Firstly, we present a programmable microcontroller-driven injection system for the exchange of an imaging medium while using AFM. Using this low-noise system, high-resolution imaging can be performed during the process of injection without disturbance. The use of the injection system was put into practice when studying the conformational changes of DNA molecules during the injection...
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Cryptographic Hash Functions in Groups and Provable Properties

Juraj Šarinay
We consider several "provably secure" hash functions that compute simple sums in a well chosen group (G,*). Security properties of such functions provably translate in a natural way to computational problems in G that are simple to define and possibly also hard to solve. Given k disjoint lists Li of group elements, the k-sum problem asks for gi ∊ Li such that g1 * g2 *...* gk = 1G. Hardness of the problem in the...
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UV-cured Epoxy for Adhesion in Steel Reinforced Thermoplastic Composites

Basile Golaz
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Le "Fragmentum de inventionibus scientiarum" de Diego Palomino

Nouara Chekhar
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The role of aluminium from supplementary cementitious materials in controlling alkali-silica reaction

Théodore Chappex
Alkali silica reaction (ASR) is a long-term reaction between certain aggregates containing amorphous silicate phases and the alkalis from the cement paste. These silicates react with the alkalis present in the pore solution of the cement paste and form an expansive gel in the presence of water, resulting in the macroscopic expansion and cracking of concrete. Supplementary cementitious materials (SCM), replacing a part of the Portland cement (PC) in blended pastes, are known to reduce...
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Experimental Investigation of the Aeroelastic Stability of an Annular Compressor Cascade at Reverse Flow Conditions

Virginie Anne Chenaux
Compressor surge events are unsafe operating regimes yielding highly unsteady flow fields in which complex aeroelastic phenomena occur. If the blade flutter and forced response behaviour (i.e. aeroelastic stability) can be predicted reliably for normal flow conditions, its assessment at severe-off design conditions remains a critical task for compressor development programs. During the flow reversal sequence of a surge cycle, combined aerodynamic phenomena occur which make the accurate prediction of the unsteady forces acting on...
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Molecular Modeling of Bacterial Nanomachineries

Matteo Thomas Degiacomi
Proteins have the ability to assemble in multimeric states to perform their specific biological function. Unfortunately, characterizing experimentally these structures at atomistic resolution is usually difficult. For this reason, in silico methodologies aiming at predicting how multiple protein copies arrange to forma multimeric complex would be desirable. We present Parallel OptimizationWorkbench (POW), a swarm intelligence based optimization framework able to deal, in principle, with any optimization problem. We show that POW can be applied to...
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Registration Year

  • 2012
    457,593

Resource Types

  • Text
    195,416
  • Dataset
    132,269
  • Image
    87,164
  • Collection
    2,966
  • Audiovisual
    592
  • Other
    104
  • Workflow
    74
  • Event
    55
  • InteractiveResource
    22
  • Software
    11
  • Film
    9

Affiliations

  • Centre for Ecology and Hydrology
    11
  • British Geological Survey
    2
  • King's College London
    1
  • University of Stirling
    1
  • Lancaster University
    1
  • University of Leicester
    1
  • Institut Senegalais De Recherches Agricoles
    1
  • Butterfly Conservation
    1
  • Bournemouth University
    1