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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Application of pattern recognition and adaptive DSP methods for spatio-temporal analysis of satellite based hydrological datasets

Turlapaty, Anish Chand 01 May 2010 (has links)
Data assimilation of satellite-based observations of hydrological variables with full numerical physics models can be used to downscale these observations from coarse to high resolution to improve microwave sensor-based soil moisture observations. Moreover, assimilation can also be used to predict related hydrological variables, e.g., precipitation products can be assimilated in a land information system to estimate soil moisture. High quality spatio-temporal observations of these processes are vital for a successful assimilation which in turn needs a detailed analysis and improvement. In this research, pattern recognition and adaptive signal processing methods are developed for the spatio-temporal analysis and enhancement of soil moisture and precipitation datasets. These methods are applied to accomplish the following tasks: (i) a consistency analysis of level-3 soil moisture data from the Advanced Microwave Scanning Radiometer – EOS (AMSR-E) against in-situ soil moisture measurements from the USDA Soil Climate Analysis Network (SCAN). This method performs a consistency assessment of the entire time series in relation to others and provides a spatial distribution of consistency levels. The methodology is based on a combination of wavelet-based feature extraction and oneclass support vector machines (SVM) classifier. Spatial distribution of consistency levels are presented as consistency maps for a region, including the states of Mississippi, Arkansas, and Louisiana. These results are well correlated with the spatial distributions of average soil moisture, and the cumulative counts of dense vegetation; (ii) a modified singular spectral analysis based interpolation scheme is developed and validated on a few geophysical data products including GODAE’s high resolution sea surface temperature (GHRSST). This method is later employed to fill the systematic gaps in level-3 AMSR-E soil moisture dataset; (iii) a combination of artificial neural networks and vector space transformation function is used to fuse several high resolution precipitation products (HRPP). The final merged product is statistically superior to any of the individual datasets over a seasonal period. The results have been tested against ground based measurements of rainfall over our study area and average accuracies obtained are 85% in the summer and 55% in the winter 2007.
22

The response switching effect.

Barnes, Heather J. 01 January 1988 (has links) (PDF)
No description available.
23

Confounding variables in the discriminated Irt procedure.

Palmer, David C. 01 January 1983 (has links) (PDF)
When discriminated IRT procedures have been used to determine preference relations among temporally extended operants, deviations from predictions of the matching law have been found (Hawkes and Shimp, 1974). Using a yoked-control procedure, the present study shows that keypecking in the discriminated IRT procedure has two sources of strength, that arising from the stimulus-reinforcer contingency and that arising from the response-reinforcer contingency Three out of four yoked birds autoshaped to the keylight, and all lead birds showed evidence of control by the keylight under some conditions. As any control of keypecking by the keylight, either discriminated or autoshaped, contributes to deviations from matching, the discriminated IRT procedure does not permit one to draw strong conclusions about preference relations among IRTs.
24

Parenting and Emerging Adult Adjustment: The Role of Parental Discipline and Consistency

Golding, Courtney Boushe 17 August 2013 (has links)
Parenting practices and discipline practices impact children’s lives in many ways, particularly children’s behaviors and outcomes. Positive parenting practices including authoritative parenting, non-violent discipline practices, and consistency are associated with positive psychological adjustment. Research demonstrates that negative parenting practices including authoritarian and permissive parenting, harsh discipline practices, and inconsistency are related to childhood maladjustment. The current study aimed to examine the relationships among parenting practices, discipline practices, consistency, and emerging adult psychological adjustment. Results indicated that positive parenting, positive discipline, and consistent practices are negatively correlated with emerging adult maladjustment. The current study found no differences between mothers and fathers for parenting practices, discipline practices, or consistency. Lastly, it was found that consistency acts as a partial mediator between parenting and discipline practices and psychological outcome and is a strong predictor of psychological adjustment.
25

A simulation framework to ensure data consistency in sensor networks

Shah, Nikhil Jeevanlal January 1900 (has links)
Master of Science / Department of Computing and Information Sciences / Gurdip Singh / The objective of this project is to address the problem of data consistency in sensor network applications. An application may involve data being gathered from several sources to be delivered to multiple sinks, resulting in multiple data streams with several sources and sinks for each stream. There may be several inter-stream constraints to be satisfied in order to ensure data consistency. In this report, we model this problem as that of variable sharing between the components in an application, and propose a framework for implementing variable sharing in a distributed sensor network. In this framework, we define the notion of variable sharing in component based systems. We allow the application designer to specify data consistency constraints in an application. Given an application, we implement a tool to identify various types of shared variables in an application. Given the shared variables and the data consistency constraints, we provide an infrastructure to implement the shared variables. This infrastructure has tools to synthesize the code to be deployed on each of the nodes in the physical topology. The infrastructure has been built for the TinyOS platform. We have evaluated the framework using several examples using the TOSSIM simulator.
26

Mixtures of triangular densities with applications to Bayesian mode regressions

Ho, Chi-San 22 September 2014 (has links)
The main focus of this thesis is to develop full parametric and semiparametric Bayesian inference for data arising from triangular distributions. A natural consequence of working with such distributions is it allows one to consider regression models where the response variable is now the mode of the data distribution. A new family of nonparametric prior distributions is developed for a certain class of convex densities of particular relevance to mode regressions. Triangular distributions arise in several contexts such as geosciences, econometrics, finance, health care management, sociology, reliability engineering, decision and risk analysis, etc. In many fields, experts, typically, have a reasonable idea about the range and most likely values that define a data distribution. Eliciting these quantities is thus, generally, easier than eliciting moments of other commonly known distributions. Using simulated and actual data, applications of triangular distributions, with and without mode regressions, in some of the aforementioned areas are tackled. / text
27

Concurrency control in multiple perspective software development

Poon, W. L. January 1999 (has links)
No description available.
28

Harmonia na geometria, seção transversal, perfil longitudinal e velocidades em rodovias / Consistency on geometric design, cross section, longitudinal profile and velocity through highways

Vasconcelos, Raimundo Expedito 29 February 2000 (has links)
Harmonia na geometria de rodovias é a medida sobre o grau de concordância e compatibilidade entre os componentes da geometria da rodovia e o volume de solicitações físicas, ou à habilidade de motoristas. Esse trabalho expõe e discute resultados obtidos durante ações de uma tentativa para mostrar que informações sobre a qualidade de viagens obtidas através de notas fornecidas por avaliadores, levantamento de velocidade de veículos e dados sobre o formato de seções transversais podem ser úteis para o estudo e explicação de conceitos sobre a harmonia na geometria de rodovias vicinais. / Consistency on geometric design is a measure on the degree of concordance and compatibility among characteristics of components of the highway shape and the volume of physical or driver ability requirements. This work shows and discusses the results obtained during an attempt to show that information about the quality of travel obtained through scores from trained observers, vehicles velocities surveys and data from the shape of the highway sections should be useful to the study and explanations of concepts on the secondary highway consistency on geometric design.
29

Harmonia na geometria, seção transversal, perfil longitudinal e velocidades em rodovias / Consistency on geometric design, cross section, longitudinal profile and velocity through highways

Raimundo Expedito Vasconcelos 29 February 2000 (has links)
Harmonia na geometria de rodovias é a medida sobre o grau de concordância e compatibilidade entre os componentes da geometria da rodovia e o volume de solicitações físicas, ou à habilidade de motoristas. Esse trabalho expõe e discute resultados obtidos durante ações de uma tentativa para mostrar que informações sobre a qualidade de viagens obtidas através de notas fornecidas por avaliadores, levantamento de velocidade de veículos e dados sobre o formato de seções transversais podem ser úteis para o estudo e explicação de conceitos sobre a harmonia na geometria de rodovias vicinais. / Consistency on geometric design is a measure on the degree of concordance and compatibility among characteristics of components of the highway shape and the volume of physical or driver ability requirements. This work shows and discusses the results obtained during an attempt to show that information about the quality of travel obtained through scores from trained observers, vehicles velocities surveys and data from the shape of the highway sections should be useful to the study and explanations of concepts on the secondary highway consistency on geometric design.
30

The ability to generate or inhibit responses after frontal lobectomy /

Miller, Laurie Ann January 1987 (has links)
No description available.

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