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.
Results
Showing 1 to 20 of 23 for “"Wave reflections"”.
-
Wave reflections from breakwaters
… The technique is applicable to an array of wave gauges of arbitrary geometry deployed seaward of the reflector. An expansion for small oblique wave incidence angles is used to derive an approximate relationship between measured array cross-spectra and a small number of parameters that …
-
Theoretical and Experimental Analysis of Wave Reflections in Branched Flexible Conduits
Made available in DSpace on 2014-12-10T17:25:37Z (GMT). No. of bitstreams: 1 6612380.pdf: 3073736 bytes, checksum: 336f5b19b1209b425225fedcf30bfafe (MD5) Previous issue date: 1966
-
3-D numerical modeling of the P and SV wave reflections from fractured reservoirs
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.
-
Field investigation comparing conventional compressional-wave, converted-wave, and horizontally-polarized shear-wave reflections, A
Includes bibliographical references.
-
Sex Differences in Cardiovascular Adaptations to Chronic Endurance Exercise
… load (blood pressure, aortic stiffness and wave reflections). However, studies in male marathoners suggest detrimental cardiac remodeling, such that larger cardiac mass is associated with reduced cardiac function and higher central hemodynamic load. There are well-established sex differences …
-
Utilization of a tropospheric-stratospheric lidar system to study mountain induced gravity waves over jenny jump state forest
Gravity waves are a dominant driver of the middle and lower atmospheric circulation. Yet such waves have been difficult to study due to their inherent small spatial and temporal scales and synoptic occurrence, and thus require advanced experimental systems. In this thesis first results are …
-
Prediction and analysis of wing flutter at transonic speeds.
… far-field boundary condition for minimizing wave reflections from numerical boundaries. Results for various test cases obtained using this code show good agreement with the experiments and other theories.
-
Atomistic and mesoscale modeling of dislocation mobility
… linear response theory, which minimizes boundary wave reflections in molecular dynamics simulations without artificial damping. When predictive models are confronted with experiments at the level of mesoscale kinetics, the challenge is to properly incorporate atomistic details into a …
-
Sistemas integrados de la navegación mediante redes locales inalámbricas
… based on two fundamental reasons. Firstly, EHF waves range from 30 to 300 GHz, which makes possible high data transmission rates (up to 155 Mbps). Secondly, EHF waves suffer both high attenuation and low diffraction when they are propagating through indoor channels, which provides a good …
-
Synthetic Aperture Radar Simulation for Point and Extended Targets
<p>Basic radar systems use electromagnetic wave reflections from targets to determine the motion characteristics of these targets. Synthetic Aperture Radar (SAR) systems use the reflections to produce target images as well. SAR is an imaging radar system that produces high resolution images of a …
-
One-terminal traveling wave-based protection for HVAC and HVDC transmission lines
… work proposes developing one-terminal traveling wave-based transmission line protection methods for HVAC (High Voltage Alternating Current) and HVDC (High Voltage Direct Current) systems. It considers the effect of the sampling frequency on the protection, which until now has not been …
-
A Nondimensional Scaling Parameter for Predicting Pressure Wave Reflection in Stented Arteries
… be improved, focusing on the problem of pressure wave reflections. A one-dimensional finite-difference model was developed to predict these reflections, and effects of variations in stent and vessel properties were examined, including stent stiffness, length, and compliance transition region, as …
-
The effect of venting configuration on the blast response of an aircraft unit load device
… in terms of the number and magnitude of blast wave reflections, and internal pressure build-up, was reduced when introducing venting areas. Final deformations were reduced by 11% and 22% when using a single- and double-venting configuration, respectively. Further deformation reduction was …
-
Energy Absorption and Dynamic Behaviors of Architectured Interpenetrating Phase Composites
… velocity responses by tracking internal wave reflections. Finally, we observe that the post-shock maximum temperature increases with structural openness, and temperature hotspots form at interfaces parallel to the shock direction. The findings in this work 1) highlight the ability to …
-
Concurrently coupled multiscale modeling of polymer nanocomposites
… of far-field loading, and prevents stress wave reflections from the external boundary impinging back on the crack tip. In our approach, Material Point Method (MPM), which is a meshless particle-in-cell method based on Arbitrary Euler-Lagrange (ALE) scheme and has been proven to have good …
-
Pulsed ring-down antennas for implementation in a phased array
… and then closing a switch to develop transient wave reflections on the antenna. Typical CW case analysis does not apply in this case. Since these systems are fairly new in study, it is often difficult to predict the overall performance without experimental evaluation. For this reason, we have …
-
Development and Application of Low-Order Computational Models of the Left Ventricle
… to the LV. The aorta is described by a 1D wave propagation model. The mitral and aortic valves are formulated as both time-delay and variable resistance valves. The circulation loop is closed using lumped parameter models. We explore the coupled circulatory system with several sets of …
-
Computational and experimental time domain, one dimensional models of air wave propagation in human airways
… applied to simulate blood pressure and flow waveforms in arteries, providing a good compromise between accuracy and computational cost. This work represents the first attempt to apply this formulation to study pulse waveforms in the human bronchial tree. Experiments have been carried out, in …
-
Sand bed morphodynamics under water waves and vegetated conditions
… in this region such as sediment transport, wave attenuation, and boundary layer development are directly governed by the presence of bathymetric features, which include large-scale sand bars upon which smaller-scale sand ripples are superimposed, as well as the presence of submarine …
Page 1 of 2