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 89 for “"calculation methods"”.
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Comparing Rusle LS Calculation Methods across Varying DEM Resolutions
… important part of RUSLE. This work compared two methods of L calculation, the grid cumulation (GC) and the contributing area (CA) methods, and two methods of S calculation, the neighborhood (NBR) and maximum downhill slope (MDS) methods. These were compared across digital elevation models (DEMs) …
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Development of Free Energy Calculation Methods for the Study of Monosaccharides Conformation in Computer Simulations
… This aspect explains the interest in free energy calculations, and methods exist, such as umbrella sampling or metadynamics, that allow to accelerate the sampling of different conformations by adding bias forces. In general, accelerated sampling methods are based on the choice of collective …
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Electronic States near Surfaces - a) Analysis of calculation methods using semi-infinite boundary conditions; b) Sensitive detection using laser photoelectron spectroscopy
… properties of these systems, computer modeling methods are needed. The "SI-PAW" method is designed to solve the Kohn-Sham equations within the projector augmented wave "PAW" formalism with boundary conditions appropriate for the semi-infinite geometry of material surfaces. This method, which …
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The efficacy of back calculation methods for determining length at age data and the use of such data to determine growth standards, national growth patterns and recruitment dynamics of roach (Rutilus rutilus (L.)), dace (Leuciscus leuciscus (L.)) and chub (Leuciscus cephalus (L.)) in UK rivers
… fisheries surveys, an appropriate method of back-calculation was sought. A number of back-calculation methods were found from the literature and applied to data from fish surveys. Back-calculated lengths at age from specific cohorts were compared to observed mean lengths at age from historic …
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The Average Potential Method of Calculating the Resistance of Power Substation Grounding Systems.
… the results of which are compared with alternate calculation methods for several test cases.Since each component in the grounding system is modeled separately, the method of calculating the resistance as described in this thesis makes no simplifying assumptions concerning the shape or arrangement …
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Thermal models of buildings : determination of temperatures, heating and cooling loads : theories, models and computer programs
… codes. All these situations require good calculation methods. The main purpose of this report is to present the authors work with problems related to thermal models and calculation methods for determination of temperatures and heating or cooling loads in buildings. Thus the major part of …
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Application of extreme value theory to the calculation of value-at-risk
… the applicability of published EVT-based VaR calculation methods to the South African market. Two methods were tested on a hypothetical portolio of South African stocks, using the standard backtesting technique.
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Métodos de cálculo de atrito negativo em estacas - estudo e discussão
… negative skin friction on piles. The must usual calculation methods and how to deal with this problem in deep foundation design are discussed. Two field problems were analyzed according to the above cited methods.
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Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown
The introduction of calculation methods for motion induced interruptions (MII) in 1984 introduced a new way to quantify human factors in addition to the motion sickness index (MSI). The 1990 Graham method for calculating MII uses a combination of a vessel's acceleration and roll to determine a …
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Anwendung der Monte-Carlo-Methoden zur Lösung spezieller Probleme des Photonentransports
… code were implemented. The photon transport calculations were made for simulation of light distribution in tissues, for 3D estimation of dosis brachytherapy source, for determination of scattering coincidences in PET and for solving of one special problem for ambient dosimetry. The developed …
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The effects of typical construction details on the strength of composite slabs
… of this experimental study are analyzed using methods given in the Steel Deck Institute Composite Deck Design Handbook. The models were found to conservatively predict the strength of the composite slabs. Recommended modifications to the calculation methods are given.
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Sensitivity Calculations For Conservation Laws With Application To Discontinuous Fluid Flows
… flow optimization, control and design and in the calculation of perturbed flows. Problems arise in all sensitivity calculation methods in the presence of discontinuities and other complexities such as shock waves, contact discontinuities and rarefaction waves that commonly occur in super and …
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Modelling HIV/AIDS epidemic in Nigeria
… centre of excellence. A thorough review of methods used by WHO/UNAIDS to produce estimates of the Nigerian HIV/AIDS scenario was carried out. The Estimation and Projection Package (EPP) currently being used for modelling the epidemic partitions the population into at-risk, not-at-risk and …
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Effect of conductor size on the total cost of electricity distribution feeders in South African electrification
… Traditional conductor size optimisation methods base technical load loss costs on upstream generation and network costs. These loss costing methods assume that consumers behave as constant power loads. The impact of conductor voltage drops on changes in consumer energy consumption and …
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RECOVERY-RD: The Development of a Biotransformation Model for Sediment Systems Contaminated with PCBs
… represented when compared to alternative calculation methods that have been previously verified. A hypothetical application of the initial version of the model provides evidence of the usefulness as a screening-level tool for the assessment of remedial efficacy.
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Computational Framework for Assessing Voltage Security Using Energy Methods
… once it occurs. Finally, it advances power flow calculation methods by offering algorithms that improve the convergence properties of power flow engines in solving modern power system models. The proposed tools are applied to systems ranging in size from two to several thousand buses.
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Structure determination of proteins and protein aggregates by magic-angle spinning solid-state NMR
… isotopic labeling schemes, and novel structure calculation methods. The techniques developed in this study will be useful in the study of other protein aggregates, as well as membrane proteins and complexes, for which SSNMR is the structure determination method of choice.
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The potential for a nuclear renaissance : the development of nuclear power under climate change mitigation policies
… vary widely, because of differences in both calculation methods and cost parameters. Based on a sensitivity analysis, the most important parameters are the discount rate, the overnight cost, the capacity factor and the economic lifetime. The methodological differences affect not only the …
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First principles Monte Carlo simulation of charge transport in semiconductors
… data from both experimental and alternative calculation methods. The formalism developed in this thesis for the calculation of electron-phonon interaction strength is then applied to the calculation of matrix elements for an exhaustive set of transitions throughout the entire Brillouin zone …
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