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Evaluation Of Rutting Resistance Of Coarse Graded Aggregate Asphaltic Concrete Mixes In Clark County, Nevada, Jerold Dewayne Stegeman
Evaluation Of Rutting Resistance Of Coarse Graded Aggregate Asphaltic Concrete Mixes In Clark County, Nevada, Jerold Dewayne Stegeman
UNLV Retrospective Theses & Dissertations
The purpose of this study is to evaluate the effectiveness of utilizing coarse aggregates in asphaltic concrete pavements for reducing rutting in Clark County, Nevada. Previous specifications used for asphaltic concrete mix designs in the Clark County area allowed for a wide range of aggregate gradations. The aggregate gradations in the asphaltic concrete mixes produced from these specifications tended to be on the finer side of the range. The pavements constructed based on the specifications were observed to be tender and susceptible to rutting. Paving projects were initiated which demonstrated that coarser aggregates in the asphalt mixes appeared to reduce …
Analysis And Evaluation Of Three Promising Nuclear Waste Disposal Options, Venugopal Veeramachaneni
Analysis And Evaluation Of Three Promising Nuclear Waste Disposal Options, Venugopal Veeramachaneni
UNLV Retrospective Theses & Dissertations
Disposal of high level nuclear waste has evoked much interest among scientists, engineers and society at large. Numerous schemes have been proposed in this regard and a few have been analyzed thoroughly. However, these schemes have been found to be valid only under very specific environmental conditions, thus imposing constraints on the scheme of disposal. The option of retrievability imposed another constraint. In addition to accommodating the constraints, the disposal scheme must also comply with federal regulations (NRC 10 CFR PART 60, EPA 10 CFR PART 191, DOE 10 CFR PART 960). Due to the longevity of radionuclide toxicity, the …
Performance Evaluation Of Distributed Mutual Exclusion Algorithms, Kenneth B Been
Performance Evaluation Of Distributed Mutual Exclusion Algorithms, Kenneth B Been
UNLV Retrospective Theses & Dissertations
In any system in which concurrent processes share resources, mutual exclusion refers to the problem of guaranteeing the integrity of those resources by restricting their use to one process at a time. Due the complex nature of distributed systems, distributed mutual exclusion algorithms are often not amenable to theoretical analysis for performance or even correctness. Experimental inquiries are therefore warranted. This thesis investigates seven well known distributed mutual exclusion algorithms in detail, and uses computer simulation to evaluate the performance and applicability of these various algorithms. Toward this end, a realistic and general model for evaluating distributed algorithms is proposed. …
Evaluation Of Selected Aliphatic Acids And Polytetrahydrofurans For Use As Calibration Agents For Thermospray Hplc/Ms, Tonya Rose Dombrowski
Evaluation Of Selected Aliphatic Acids And Polytetrahydrofurans For Use As Calibration Agents For Thermospray Hplc/Ms, Tonya Rose Dombrowski
UNLV Retrospective Theses & Dissertations
A method of tuning and calibration for a thermospray ion source on a benchtop quadrupole mass spectrometer using trifluoroacetic acid, pentafluoropropionic acid, heptafluorobutyric acid, polytetrahydrofuran-250, and polytetrahydrofuran-650 was proposed and evaluated. A 0.5% solution of the aliphatic acids showed good mass range coverage (163-641) in the negative mode, and no substantial memory effects. This mixture was evaluated over 45 days for fluctuations in the ion intensities and ratios. It remained stable within the expected thermospray reproducibility range, although the volatility of the trifluoroacetic acid made daily preparation of standard mixtures necessary. A similar solution of the polytetrahydrofurans was evaluated in …
Evaluation Of Filter Pack Dewatering On Voc Concentrations In A Simulated Low-Yield Monitoring Well, Gary Allen Icopini
Evaluation Of Filter Pack Dewatering On Voc Concentrations In A Simulated Low-Yield Monitoring Well, Gary Allen Icopini
UNLV Retrospective Theses & Dissertations
A physical model was constructed to investigate the physical process of dewatering the filter-pack of a low-yield ground-water monitoring well and determine if this process effects the concentration of dissolved volatile organic compounds (VOCs). It was hypothesized that losses of VOCs would be observed as a result of an increased air-water interface and possibly turbulent flow through the filter pack during water-level recovery; Little or no measurable losses of 1,1,1-TCA, MCB, or 1,1,2,2-TET were detected during water-level recovery while simulating non-stagnant well conditions. These data imply that losses of VOCs due to volatilization resulting from the physical action of water …