Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Isolated Systems"”.
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Package-scale galvanically isolated systems for data transfer [Sistemi di isolamento galvanico package-scale per trasferimento dati]
Questa tesi riguarda la progettazione di isolatori galvanici package-scale. Tali sistemi sfruttano tecniche di packaging/assemblaggio e accoppiamento a radiofrequenza (RF) tra micro-antenne per trasmettere dati da un'interfaccia utente a un'interfaccia isolata. In particolare, viene proposto un …
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Reliability and cost/worth evaluation of generating systems utilizing wind and solar energy
… than conventional sources. Energy storage systems are, therefore, often required to smooth the fluctuating nature of the energy conversion system especially in small isolated applications. The research work presented in this thesis is focused on the development and application of …
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Protein interactions in vitro and in the cell
… In this environment proteins are far from isolated systems and interact with many other biological molecules they encounter. In recent years, better instrumentation and greater computing power have enabled imaging of elusive biomolecule dynamics in cells, driving many advances in …
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Impacts of non-native rainbow trout on stream food webs in the Cape Floristic Region, South Africa integrating evidence from surveys and experiments
… system. Impacts are expected to be strong in isolated systems lacking functionally similar predators because native species will be naïve to the foraging behaviour of the introduced predator, and because the invasion is likely to change the role which the native predator assemblage performs. …
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Dicke enhanced energy transfer via off resonant coupling y Christopher Black.
… of energy between two collections of two level systems via an off-resonant oscillator. No first-order transfer of energy is possible because the systems are optically isolated. The entire system is placed into a low-frequency simple-harmonic-oscillator (SHO) which indirectly couples the two …
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Patterns of microbial community development in isolated aquatic systems
… process of microbial community development in isolated aquatic systems to the MacArthur-Wilson equilibrium theory of island biogeography and suggest alternative models for the observed patterns. Water-filled plastic containers were used as aquatic islands to investigate the colonization …
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Nanopartículas magnéticas adsorvidas em superfícies metálicas
Understand the physical properties of magnetic systems adsorbed in metallic surfaces is quite important for technological and scientific reasons. Here, this kind of system is studied theoretically by first principles calculations, based on the density functional theory (DFT), as well as by tight …
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Selected Topics on Molecular Electronics, Magnetism and Surface Science
… physical properties of crystalline solids and isolated systems with a relatively large number of atoms. Such simulations are known as ab initio or first principles simulations because no free parameters enter into them, everything is derived from the postulates of quantum mechanics. However, in …
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A comprehensive computer-aided planning approach for universal energy access : case study of Kilifi, Kenya
… of electrification (grid extension, micro or isolated systems) given the current base scenario; the Reference Cooking Model (RCM)-used to determine technology choices for the provision of modem heat for cooking; and the MASTER4all Model-used to evaluate the future macro level impact of …
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Architectural modelling and verification of open service-oriented systems of systems
Systems of Systems (SoS) have received a lot of attention recently. In this thesis we will focus on SoS that are built atop the techniques of Service-Oriented Architectures and thus combine the benefits and challenges of both paradigms. For this thesis we will understand SoS as ensembles of single …
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The impact of environment on the evolution of protoplanetary discs
… have been initially considered as idealised isolated systems orbiting around a single star. However, recent surveys are showing that both multiplicity and the natal environment can significantly affect disc evolution, since most of stars are born in intermediate-large groups and clusters. …
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The Cauchy problem and the initial data problem in effective theories of gravity
… data that represents astrophysically realistic systems. Some of the physically most interesting systems are approximately isolated systems and can be modelled by asymptotically flat spacetimes. The second part of the thesis discusses three methods to construct such initial data for a class of …
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Mathematical Studies on the Asymptotic Behaviour of Gravitational Radiation in General Relativity
… that many of the commonly-used concepts to model isolated physical systems are, in fact, not suitable for this purpose. Furthermore, it is shown that the non-smoothness of future null infinity, is, in a certain sense, exactly conserved and even determines the asymptotic behaviour of gravitational …
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The evolution of dark and luminous structure in massive early-type galaxies
… is erased in BCGs but retained in more isolated systems. Secondly, I find evidence that the stellar-mass-to-light ratio declines with increasing radius in both field and cluster ETGs. With M87, I show that the strength of this gradient cannot be explained by trends in stellar metallicity …
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Modeling collaborations in adaptive systems of systems
… on functionality and flexibility, beforehand isolated systems have become interconnected to gain powerful adaptive Systems of Systems (SoS) solutions with an overall robust, flexible and emergent behavior. The adaptive SoS comprises a variety of different system types ranging from small …
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Dynamical Aspects of Topological Quantum Systems
… within the ground states of many-body quantum systems. In this thesis, we discuss how novel phenomena associated with topological phases can arise in systems that are driven out of equilibrium or coupled to their surroundings, which are not described by ground state physics. Firstly, we …
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The role of farm dams as refugia for aquatic invertebrates in a salinised landscape, south Western Australia
… as a mosaic of habitat types and not as isolated systems, farm dams are important refuge habitats for the aquatic macroinvertebrate species of Lake Toolibin. The farm dams will provide a mechanism for the maintenance of aquatic invertebrate species richness and abundance. Refuge farm dam …
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Spacecraft charging and attitude control characterization of electrospray thrusters on a magnetically levitated testbed
… predict the charging properties of electrically isolated systems. This model simulates a bipolar electrospray thruster system. Experiments were conducted on the magnetic levitation testbed. The results from the experimental tests demonstrate that neutralization with heavy ionic species is indeed …
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The Effect of Spatial and Environmental Drivers on Patterns in Species Richness and Composition
… and their underlying drivers. Islands and isolated systems are in the focus of this work. Islands provide optimal conditions to study biogeographic patterns. Theoretical advances in ecology have been initiated by island biogeography. Theory on island biogeography has particularly been …
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A study of the effect of Lake Erie on deep convective systems
… storms, 24 were classified as ‘clusters’, 20 ‘isolated’, 27 ‘linear’ and 18 ‘complex.’ The evolution of each type of convective system, depicted by changes in the storm’s maximum base reflectivity after spending 30 and 60 minutes over the water, was related to environmental parameters …