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 473 for “"near-surface"”.
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Modelling of the near-surface wind speed
Das Wissen über die oberflächennahe Windgeschwindigkeit und deren Vorhersage ist von größtem Interesse für eine Vielzahl von Anwendungen, einschließlich der Windenergie. Für die vorliegende Arbeit wurden folgende Aspekte untersucht: i) die Variabilität des Windes in der Vergangenheit über …
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Near surface wear structure of ceramic components
… was used to determine the strain profile in the near surface regions of a flat and a rough fully stabilized zirconia samples. The results show that a compressive zone is present in the near surface region of each sample. A partially stabilized zirconia disk was examined using symmetrical and …
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Near-surface temperature conditions in high mountain environments
Vor dem Hintergrund der Indikatorfunktion von Hochgebirgen hinsichtlich des Klimawandels wurden in den mittelnorwegischen Skanden die oberflächennahen Temperaturverhältnisse untersucht. Dabei konnte eine übergeordnete Steuerung der Temperaturen durch mikroskalige Reliefbedingungen belegt werden. Da …
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Near-surface hydrology and hydrochemistry under contrasting land-cover
Human transformation of the Earth’s land surface has far-reaching and important consequences for the functioning of hydrological and hydrochemical processes in watersheds. In nowadays land-use change from forest to pasture is a major issue in particular in the tropics. A sustainable management of …
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Modeling the Near-Surface Using High-Resolution Seismic Data
In the Arabian Peninsula, the near-surface represents a major challenge in seismic exploration. For accurate deep subsurface reservoir imaging, an accurate near-surface velocity model is required. In this dissertation, I review the regional geology and geomorphology and the existing methods used …
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Near-surface tornado wind field estimation using damage patterns
… design, an accurate estimate of the near-surface (10 m above ground level) wind field is essential. However, the near-surface wind field of a tornado is not well understood due to the lack of in-situ measurements and limitations of the wind speed estimation from structural damage. As …
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Advanced Instrumentation and Measurements Techniques for Near Surface Flows
… for the DGV profile. Lessons learned from the near-wall flow diagnostics development were applied to a novel benchmark model problem incorporating the relevant physical mechanisms of the high amplitude periodic turbulent flow experienced by turbine blades in the field. The model problem is …
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Microwave remote sensing of near-surface moisture and temperature profiles.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Multi-fold TDEM Experiment Design for Near Surface Conductivity Mapping
… set each provided unique insights into the subsurface electrical structure through a complementary interpretation. Synthesis of log-normalized ∂tB<sub>z</sub> pseudo-sections provided a first-order analysis of the lateral and vertical heterogeneities of the profile. A Zero-Crossing Moveout …
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Geophysical investigations of near-surface mine sites in northern West Virginia
The production of acid mine drainage (AMD) from surface and underground coal mine sites in northern West Virginia is a major environmental problem and continues to receive much attention in affected communities. Reclamation efforts at these sites often require extensive and costly treatments and …
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Visualization of Near-Surface Flow Patterns for Air-Water Gas Transfer
Near-surface flow patterns and their influence on local transport processes are investigated in a horizontal plane with visualization techniques. For this, a new method was developed that produces tracer particles with high effective Schmidt number (Sc = O(10^6) ) by chemical reaction directly at …
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Techniques of Geophysical Prospection as applied to Near Surface Structure Determination
… their application in the detection of discrete, near-surface features. The research includes the design and development of instruments to facilitate these measurements, in both laboratory and field environments. Field surveys over a variety of small scale features, are carried out to define the …
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The influence of thunderstorm type on extreme near-surface wind characteristics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Influence of near surface moisture gradients in concrete on 'Autoclam' permeation measurements
In this thesis the effect of moisture in the surface layers of concrete on the permeation properties measured using the 'Autoclam' is investigated. A literature survey indicated two main ways of removing the influence of moisture on these tests - to assess the moisture condition of the concrete and …
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Individual and joint inversion of surface wave tomography for near-surface applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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Numerical model investigation of near-surface circulation features of the Angola Basin
The primary objective of this thesis is to identify and investigate the most prominent circulation features of the Angola Basin from the output parameters of the OPAITOTEM Ocean Parallelisel Trois Oceans Tropicaux) tropical circulation model, focusing particularly on the so-called Angola Gyre and …
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