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Showing 1 to 20 of 1470 for “"roughness"”.
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Surface roughness of Mars
… had made it impossible to measure surface roughness at 100 m length scales. By calculating the returned energy, the problem of saturation can be avoided. This algorithm was applied to MOLA data across the Martian surface to create an estimate of surface roughness across the planet. The …
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Vocal Roughness in Selected Pastors
… The purpose of this study was to delineate vocal roughness in a sample of pastors. Thirty-eight pastors from the Springfield, Missouri community filled out a voice questionnaire and were tape recorded sustaining the vowels / a, i, ae, ^ / and a test sentence, "Joe took father's shoe bench out". …
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The Si/SiO2 Interface Roughness
The Si/Si02 interface roughness has important effects on the performance of metal-oxide semiconductor field effect transistor devices, which dominate contemporary integrated circuit technology. There have been intense efforts to study this system due to its importance. In this work, a new …
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Roughness-induced boundary layer transition
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Error Mitigation in Roughness Measurements
Road roughness is an important factor in determining the quality of a stretch of road. The International Roughness Index, a specific measure of road roughness, is widely used metric. However, in order to measure roughness, an accurate road profile must exist. To measure the roads, terrain profiling …
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Roughness length variability over heterogeneous surfaces
… al. (1971) and Dyer (1974) are used to calculate roughness lengths and surfacelayer heat fluxes from multilevel observations of wind, temperature, and humidity measured at three locations in the Weather Information Network Display System at Cape Canaveral Air Force Station, Florida. Relationships …
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Modeling Roughness of Rock Discontinuity Surfaces
… quantifying the rock discontinuity condition of roughness through the physically based modeling approach of signal analysis. The development of this method came about after investigation into the use of qualitative categorizations of roughness from the RMR rating system within rock engineering …
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The Si/SiO(2) Interface Roughness
The Si/SiO$\sb2$ interface roughness has important effects on the performance of metal-oxide-semiconductor field effect transistor devices, which dominate contemporary integrated circuit technology. There have been intense efforts to study this system due to its importance. In this work, a new …
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Modeling of conductor surface roughness effect
Conductor surface roughness effect refers to the influence of surface roughness on the current flow inside a conductor and the subsequent effect on electromagnetic properties of the conductor. The existence of surface roughness on a conductor disturbs current flow and results in a higher than usual …
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Surface Roughness Effects on Bidirectional Reflectance
Made available in DSpace on 2014-12-10T22:48:19Z (GMT). No. of bitstreams: 1 7317428.pdf: 4305340 bytes, checksum: 8e833be46ed968f799b263c9cc9027fb (MD5) Previous issue date: 1972
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Dynamic vegetation Roughness in the riparian zone
… increase flood risk due to increased channel roughness. Traditional means of predicting flow hydraulics involve applying a constant roughness value, while neglecting change in roughness due to flow characteristics and variation of vegetation parameters. The objective of this research was to …
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The development of rail-head acoustic roughness
A model of the development of rail-head acoustic roughness on tangent track has been formulated. The model consists of a two-dimensional time domain wheel-rail interaction force calculation, with the normal force used as the input to a two-dimensional rolling contact and wear model. The possibility …
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Making roughness : shaping site at Granger Bay
This project is about "roughness" at all scales . It is about Landings: land and sea and Granger Bay. It is about deposition and erosion; heaving rubble and anchored shale. It is about a working "landschaft" of multiple overlapping contested uses. It is about abstracting natural forces to create …
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Hydraulic roughness of corrugated, unperforated plastic drainage tubing
Thesis (M.S.)--Michigan State University. Department of Agricultural Engineering, 1971
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The role of roughness in earthquake source physics
… at least two seismic cycles. With increasing roughness, there is a transition from seismic to aseismic slip behavior, in which the load on the fault is released by more slip events but with lower slip rate, seismic moment, and average static stress drop. We analyze the nucleation process in …
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A Discrete Roughness Index for Longitudinal Road Profiles
… vehicles, pavement, and tires must assess the roughness of a terrain surface for the design of their products. The International Roughness Index (IRI), a standardized means of assessing longitudinal road roughness, quantifies roughness based on the average suspension travel for a particular …
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A photogrammetric method for measuring transient frost surface roughness.
… the FAA in evaluating exemption requests, frost roughness evolution must be characterized and modeled. However measuring transient frost roughness is difficult because of the optical and material properties of frost. This experimental investigation presents a nonintrusive, in-situ method of …
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Monitoring railway rail roughness using on-train vibration measurements
The growth of roughness on the rails of railway tracks is a significant problem that leads to increased noise and vibration emissions that affect residents near the railway. This study is devoted to a novel method of measuring rail roughness to inform maintenance operations. Unlike existing …
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Surface roughness anisotopy on mismatched InAlAs/InGaAs/InP heterostructures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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