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Showing 1 to 20 of 204 for “"extreme conditions"”.
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Savanna dynamics under extreme conditions
… cover was often lower than what the rainfall conditions would allow for. Our current understanding relies on the interaction of competition and disturbances in space and time. Hence, the influence of grazing and fire and the corresponding feedbacks they generate have been keenly investigated. …
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Nanostructured alloys for extreme conditions
… of new nanostructured materials for use in extreme mechanical and thermal environments is likely to be of critical importance for a number of future energy technologies. These materials are characterized by a large density of grain boundaries. Consequently, they are inherently strong due to …
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Instabilities in membrane structures under extreme conditions
… and design strategies to mitigate the critical conditions. The research focuses on two different loading conditions, each one leading to a specific mechanical instability of the membranes: wrinkling under quasi-static conditions and flutter instability due to dynamic conditions of wind flow. In …
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TOWARDS MODELING DRIVER BEHAVIOR UNDER EXTREME CONDITIONS
… the representation of driver behavior under extreme conditions, towards development of a micro-simulation modeling framework of traffic flow to support evaluation of management strategies and measures in emergency situations. To accomplish this objective, particular attention is given to …
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Structure determination of piezoelectric materials at extreme conditions
… Materialien aus der Langasitfamilie, die unter extremen Bedingungen untersucht wurden. Die Einkristalle aus dieser Familie, vor allem La3Nb0.5Ga5.5O14 (LNG) und La3Ta0.5Ga5.5O14 (LTG), sind vielversprechende Materialien für Oberflächenwellen (OFW) –Substratmaterialien, die in der mobilen …
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Spin Crossover under Extreme Conditions: A Structural Approach
… X-ray diffraction experiments of samples under extremes of temperature and pressure and after irradiation with laser light have been performed to characterise the structure of these various compounds. The incomplete thermal SCO observed in the dinuclear species [<Fe(bbp)(NCS)2>2 4,4’- …
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Pulsed Nmr Studies of Water Under Extreme Conditions
Made available in DSpace on 2014-12-13T20:10:29Z (GMT). No. of bitstreams: 1 7913423.pdf: 5073999 bytes, checksum: b376d7dcaf4cf0d00ff5efcaf94ae683 (MD5) Previous issue date: 1978
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Ab initio investigations of low Z materials under extreme conditions
… diagram over a large range of thermodynamic conditions, particularly at high pressures. Attaining this level of accuracy has been an ongoing challenge for experimentalists and theorists since the phase diagrams of low Z elements exhibit surprising complexity. Experimentally, static …
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Physics under extreme conditions: Magnetized atoms and hot dense plasmas
We discuss the physics of systems under extreme conditions, encompassing isolated atoms in very strong magnetic fields and the behavior of the electron gas near its crystallization point. For the atoms we consider a range of theoretical approaches, from mean field theory (Hartree-Fock) to an exact …
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Physics under extreme conditions: Magnetized atoms and hot dense plasmas
We discuss the physics of systems under extreme conditions, encompassing isolated atoms in very strong magnetic fields and the behavior of the electron gas near its crystallization point. For the atoms we consider a range of theoretical approaches, from mean field theory (Hartree-Fock) to an exact …
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Elasticity measurements at extreme conditions: application to FeO and FeNi-alloy
The picture of Earth’s deep interior is rapidly improving from the seismic tomography data and indicates more complexity than previously thought. The presence of Earth’s seismic anisotropy requires the knowledge of fully anisotropic elasticity data for mineral phases. The single-crystal elastic …
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Energy-domain synchrotron radiation Mössbauer source for physics under extreme conditions
… under high-pressure/high-temperature conditions. This makes studies of iron electronic structure under such conditions extremely challenging. The current Ph.D. thesis is divided into two major parts. The first part is dedicated to the development of a Synchrotron Mössbauer Source …
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Structural and mechanical properties of intermediate filaments under extreme conditions and disease
… function of intermediate filaments under various extreme mechanical conditions as well as disease states. We use a full atomistic model and study its response to mechanical stresses. Learning from the mechanical response obtained from atomistic simulations, we build mesoscopic models following the …
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Properties of mesons and quarks under extreme conditions from Gauge-Gravity duality
This thesis is concerned with the properties of mesons and quarks which live in the strongly coupled plasma of certain gauge theories which are similar to QCD. To study these plasmas we exploit gauge gravity duality which has been particularly useful for understanding QCD at temperatures above, but …
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Materials in extreme conditions : experimental developments and studies of systems far from equilibrium
Advances to shock wave generation and characterizations techniques are presented. Building upon previous work employing a novel quasi-2D focusing geometry, pressures of at least 100 GPa are achieved on the benchtop at the micron scale. Diagnostics for optical visualization of these generated waves …
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Single-crystal X-ray diffraction at extreme conditions in mineral physics and material sciences
… of FeOOH at pressures over 70 GPa. At ambient conditions the compound has a hydrogen bond located in channels created by irregular FeO3(OH)3 octahedra. Below 16 GPa the channels (and consequently hydrogen bonds) contract more effectively than individual Fe-O bonds in octahedra; above 16 GPa …
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Electrical resistivity of YbRh2Si2 and EuT2Ge2 (T = Co, Cu) at extreme conditions of pressure and temperature
This investigation address the effect that pressure, p, and temperature, T, have on 4f-states of the rare-earth elements in the isostructural YbRh2Si2, EuCo2Ge2, and EuCu2Ge2 compounds. Upon applying pressure, the volume of the unit cell reduces, enforcing either the enhancement of the …
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Biophysical Insights into Lipid Oxidation Effects on Membrane Self-Organization and Enzymatic Catalysis Under Extreme Conditions
… palmitate (pNPP) and glycerol under extreme temperature conditions. Electrospray Ionization Mass Spectrometry (ESI-MS) and spectrophotometric analyses demonstrated the successful formation of high-value products, namely para-nitrophenol (pNP) and glyceryl palmitate, even at elevated …
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Traffic-Based Framework for Measuring the Resilience of Ground Transportation Systems under Normal and Extreme Conditions
… ground transportation systems under normal and extreme conditions. The research methodology consisted of: (1) creating a microscopic traffic model of the road under study, (2) simulating different intrusions and interventions, and (3) measuring the resilience of the system under the different …
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Solid State Studies of [ReH9]-2 Complexes from Ambient to Extreme Conditions: High Volumetric Capacity Hydrogen Storage
… as well as elevated pressure and temperature conditions will in sequence assist in the design of suitable storage materials with optimum thermodynamic parameters.The BaReH9 complex was synthesized and evaluated under ambient to extreme environments. For this compound, we report bulk moduli for …
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