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 75 for “"Response models"”.
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Loglinear Models as Item Response Models
For analyzing item response data, item response theory (IRT) models treat the discrete responses to the items as driven by underlying continuous latent traits, and consider the form of conditional probability of the response to each item given the latent traits. In a similar fashion, log-linear …
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Semiparametric instrumental variable methods for causal response models
… how to estimate linear and nonlinear causal response functions with covariates under weak (instrumental variable) identification restrictions. The second chapter (co-authored with Joshua Angrist and Guido Imbens) applies the identification results of the first chapter to estimate quantile …
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Using dimensional analysis in building statistical response models
… of experimental data were used, each set on both models, and the respective residual sum of squares and multiple correlation coefficients compared. The results were similar in both cases. The correlation coefficients of the quadratic model were higher than those of the dimensional analysis model …
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Improving The Accuracy of Radiation Pneumonitis Dose Response Models
… lung, researchers have turned to mathematical models predicting the rate of radiation pneumonitis. However, these models rely on simple metrics based on the dose-volume histogram and are not yet accurate enough to be used for dose escalation trials. The purpose of this work was to improve the …
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Optimal designs for dose-finding in contingent response models
… In particular, we study the contingent response models of Li, Durham and Flournoy (1995). In the contingent response model, there are two opposing types of failure. We call one failure type toxicity and the other disease failure, short for failure due to disease. No disease failure is …
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Mitigating airport congestion : market mechanisms and airline response models
Efficient allocation of scarce resources in networks is an important problem worldwide. In this thesis, we focus on resource allocation problems in a network of congested airports. The increasing demand for access to the world's major commercial airports combined with the limited operational …
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Qualitative response models theory and its application to forestry
… this dissertation is the theory of qualitative response models and its application to forestry related problems. Qualitative response models constitute a class of regression models used for predicting the result in one of a discrete number of mutually exclusive outcomes. These models, also known …
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An Investigation of Cognitive Structure Within Expectancy-Value Response Models
Made available in DSpace on 2014-12-10T23:08:57Z (GMT). No. of bitstreams: 1 7405517.pdf: 7330082 bytes, checksum: 8b69a307f91d49b0de98fd664cc4d381 (MD5) Previous issue date: 1973
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Penalized Joint Maximum Likelihood Estimation Applied to Two Parameter Logistic Item Response Models
Item response theory (IRT) models are a conventional tool for analyzing both small scale and large scale educational data sets, and they are also used for the development of high-stakes tests such as the Scholastic Aptitude Test (SAT) and the Graduate Record Exam (GRE). When estimating these models …
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Bayesian approach to inference and variable selection for misclassified and under-reported response models.
Response partial missingness is a problem in studies conducted in a variety of disciplines. We investigate the impact ignoring response partial missingness has on determining a subset of significant covariates in non-linear regression. In particular, we consider non-differential misclassification …
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An Assessment of the Use of Student Price Response Models to Predict Changes in Undergraduate Enrollment at a Metropolitan University
… analyzed the price elasticity and student price response models that have been developed over time by reviewing historical price increases and enrollment across institutions. Few studies have used the models to predict changes in the enrollment of students for one college or university after the …
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Bit error simulation of FSK, BPSK, and pi/4 DQPSK in flat and frequency-selective fading mobile radio channels using two-ray and measurement- based impulse response models
A software simulation tool has been developed to simulate the performance of digital mobile radio systems in fading channels. The simulation tool generates average bit error rate (BER) and bit-by-bit error patterns with user-specified parameters. The simulation tool can simulate various …
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The foraging behaviour of granivorous birds: a mechanistic perspective.
1. The functional response, i.e. the feeding rate as a function of prey density, links resource availability to population level demographic rates. The functional response is often central to behavioural-based population models that predict the effect of environmental changes on populations based …
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Investigation of punchout distress of continuously reinforced concrete pavement
… restraint that encompassed several structural response models including two numerical models developed for CRC pavement structural response analysis. Each model was categorized according to different assumptions with regard to the bond stress distribution. Slab bending analysis models were also …
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Infrastructure Development For Personalized Risk Prediction to Reduce Cardiovascular Disease In Childhood Cancer Survivors
… in developing cardiac substructure level dose-response models is that cardiac substructure doses are not available for long-term survivors for whom late cardiac outcomes are well characterized. Moreover, existing whole-heart dose-response models were established based on dosimetry from …
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COVID-19 and the decline of autonomy: contact tracing in the age of surveillance capitalism
To develop successful COVID-19 pandemic response models, governments and policy makers are expanding on the known means of public health surveillance by collaborating with privately owned corporates and implementing new forms of surveillance technology, namely, contact tracing applications. This …
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Prediction of Methionine Retention During the Extrusion Processing of Fortified Soybean Systems
… its retention. To establish general kinetic models, it is critical to determine the effect of major parameters involved in methionine degradation, such as temperature, moisture and protein content and initial methionine concentration. The kinetics of methionine degradation as a function of …
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The Victim-Patient’s Search for Redress: Evaluating Responses to Patient Safety Incidents in Nigeria
… limited, particularly in exploring patient responses beyond negligence-based claims. This thesis critically examines existing response models to PSIs in Nigeria, identifying their strengths and limitations by testing them against the goals of patients, broadly articulated as Communication, …
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Mathematical Scaling and Statistical Modeling of Geopressured Geothermal Reservoirs
… energy production requires quick and simple models. Analytical models are not always available and simulating each case individually is expensive. The use of scaling and statistical modeling is one approach to translate the output of a simulator into quick models with general applicability at …
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