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 43 for “"Open area"”.
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An uncertainty model of a non-ideal open area test site for electromagnetic measurement
An open area test site (OATS) is a standard facility to perform electromagnetic compatibility (EMC) compliance testing of electrical and electronic products. An ideal OATS is a flat area, free of any obstructions and external signals. Precompliance testing in a non-ideal OATS is an economical way …
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Gas holdup in a gas-liquid-fiber semi-batch bubble column
… of three perforated plate gas distributors with open area ratios A = 0.57%, 0.99%, and 2.14% is employed to study gas holdup and flow regime in Rayon and Nylon fiber suspensions. This study determines the effect of superficial gas velocity, fiber type, fiber mass fraction, fiber length, and …
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Experiments and Impedance Modeling of Liners Including The Effect of Bias Flow
… results for perforated plates with percent open areas ranging from 5% to 15%. The predicted resistance results showed better agreement with experiments for the higher percent open area samples. The agreement also tended to deteriorate as bias flow was increased. For perforated plates with …
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Investigating Historical and Contemporary Land Cover Effects on Macroinvertebrate Communities and Water Quality of Virginia Piedmont Streams
… and contemporary (2011) impervious surface, open area, and forested cover were evaluated using aerial photos and GIS data. Macroinvertebrates were collected in the fall of 2012 and spring of 2013. Water quality parameters (temperature, conductivity, alkalinity, hardness, and DO) and nutrient …
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A concept for wildlife tracking using ultra high frequency (UHF) radio
… differences between power received at vegetation area compared to open area is about 10dBm while the furthest distance of the receiver can be traced in the vegetation area is about 67 meters, and for open area is more than 70 meters. The results of this study agreed with Tamir’model for …
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Fabrication of high-throughput critical-angle X-ray transmission gratings for wavelength-dispersive spectroscopy
… order of magnitude improvement in the effective area, and a factor of three increase in the resolving power of future space-based, soft x-ray spectrometers. This will enhance further studies of the universe's make-up, such as the composition of the intergalactic medium, black holes, neutron stars …
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Effects of multi-circular jet plates on the spray and flame characteristics of internal mixing air-assisted atomizer
… and P3 characterized by the difference in the open area ratio at 17.8, 18.4 and 18.9 respectively. Additionally, P1, P4, and P5 are represented by the jet-hole angles at 0o , 30o and 45o . In the experiments, the spray and flame images of all plates are captured at equivalence ratios of 0.8 to …
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Design and development of a continuous, open-return transonic wind tunnel facility
… a 6 in (width) x 9 in (height) cross-sectional area in the test section. It is a continuous, open-return facility, capable of operating within a Mach number range of M=0-0.8, and possibly reaching M=0.85 or higher depending on the test section configuration. The wind tunnel was assembled and …
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Development of Measurement Methods for Monitoring the Effects of Shed Fouling in a Fluid Coker Stripper
… sheds. When fouling obstructed 83% of the sheds’ open area, the required solids recirculation rate could not be maintained. Using various signal analysis techniques and wavelet filtering, pressure and radiation measurements can provide advanced warning that fouling is approaching critical …
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Increasing the Heat Transfer on a Grooved Surface Under Dry and Wet Conditions by Using of Jet Impingement
… transfer under different conditions such as flow open area percentage, array orifices diameter and array to surface stand-off distance. The results have shown that jet impingement is capable of delivering high transfer rates with lower cooling cost rates compared to current industry conventional …
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The Automatic Prediction of Pleasure and Arousal Ratings
… signal and its emotional impact remains an open area of research. This paper reports the results and possible implications of a pilot study and survey used to construct an emotion index for subjective ratings of music. The dimensions of pleasure and arousal exhibit high reliability. …
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Habitat Analysis and Survey of the Yellow-Bellied Sapsucker, <em>Sphyrapicus varius</em>, in the Southern Appalachians.
… analysis suggests that these birds require an open canopy of northern hardwood forest with some type of open area as a part of their territory. I have measured several other factors of the habitat as well. The information obtained in this study will be used to guide management practices to …
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Augmentation of Jet Impingement Heat Transfer on a Grooved Surface Under Wet and Dry Conditions
… speed, orifice to surface stand-of distance, and open area percentage. Cooling performance (CP) was calculated as the ratio between heat transfer and fan power. An empirical model was developed to predict jet impingement heat transfer taking into account the entrainment effects. Experimental …
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Elderly housing, orphanage, and community center
… steep, wooded slope partially encircling a flat open area, separated by a large, flat stream, further disrupted by a tiny, steeply falling stream. Located on the outskirts of Newport Virginia, the project is a small, self-contained community intended to relate to the existing town in spirit as Le …
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Engine lubrication oil aeration
… was sampled from the sump in the pump pick up area. Sump temperature, oil volume, and engine speed were continuously monitored. Aeration measurements were made via an x-ray absorption technique using a machine called Air-X. A repeatability and reproducibility (R&R) study was performed …
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Coherent control of nitrogen-vacancy centers in diamond nanostructures for quantum sensing and networking
… a large number of NV-s. However, it remains an open area of investigation whether certain nano-fabrication processes for patterning nanostructures into diamond cause irrecoverable damage or introduce atomic impurities to the crystal that would lead to a significant degradation of the NV- …
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Minimizing Visitor Impacts to Protected Lands: An Examination of Site Management and Visitor Education Methods
… social impacts that visitors cause in protected areas. The Annapolis Rocks study focuses on visitors' evaluations of a site management strategy that shifted camping from a flat, open area to constructed side-hill campsites. A visitor questionnaire was administered before and after the treatment …
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Prognozavimo problemų tyrimas virtualioje akcijų viržoje /
… as more important, since it is almost an open area so far, in the field of financial optimization. The new and most important conclusion of this work is that minimal prediction errors do not necessarily provide maximal portfolio profits. This conclusion and its underlying results have an …
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Investigation of prediction problems by the virtual stock exchange /
… as more important, since it is almost an open area so far, in the field of financial optimization. The new and most important conclusion of this work is that minimal prediction errors do not necessarily provide maximal portfolio profits. This conclusion and its underlying results have an …
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Unsupervised Phonetic Category Learning from Audio and Visual Input
… categories of their native language is an open area of research in cognitive science and child language development. However, despite experimental evidence that phonetic processing is very often a multimodal phenomenon (involving both auditory and visual cues), computational research has …
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