You limited your search to:

 Collection: UNT Theses and Dissertations
Mathematical Programming Approaches to the Three-Group Classification Problem

Mathematical Programming Approaches to the Three-Group Classification Problem

Date: August 1993
Creator: Loucopoulos, Constantine
Description: In the last twelve years there has been considerable research interest in mathematical programming approaches to the statistical classification problem, primarily because they are not based on the assumptions of the parametric methods (Fisher's linear discriminant function, Smith's quadratic discriminant function) for optimality. This dissertation focuses on the development of mathematical programming models for the three-group classification problem and examines the computational efficiency and classificatory performance of proposed and existing models. The classificatory performance of these models is compared with that of Fisher's linear discriminant function and Smith's quadratic discriminant function. Additionally, this dissertation investigates theoretical characteristics of mathematical programming models for the classification problem with three or more groups. A computationally efficient model for the three-group classification problem is developed. This model minimizes directly the number of misclassifications in the training sample. Furthermore, the classificatory performance of the proposed model is enhanced by the introduction of a two-phase algorithm. The same algorithm can be used to improve the classificatory performance of any interval-based mathematical programming model for the classification problem with three or more groups. A modification to improve the computational efficiency of an existing model is also proposed. In addition, a multiple-group extension of a mathematical programming model ...
Contributing Partner: UNT Libraries
Mathematics Anxiety and Mathematics Self-efficacy in Relation to Medication Calculation Performance in Nurses

Mathematics Anxiety and Mathematics Self-efficacy in Relation to Medication Calculation Performance in Nurses

Date: May 2012
Creator: Melius, Joyce
Description: The purpose of this study is to identify and analyze the relationships that exist between mathematics anxiety and nurse self-efficacy for mathematics, and the medication calculation performance of acute care nurses. This research used a quantitative correlational research design and involved a sample of 84 acute care nurses, LVNs and RNs, from a suburban private hospital. the participants filled out a Mathematics Anxiety Scale, a Nurse Self-Efficacy for Mathematics Scale and also completed a 20-item medication calculation test. Significant practical and statistical relationships were discovered between the variables utilizing multiple linear regression statistics and commonality analysis. As the Nurse’s Mathematics anxiety score increased the scores on the medication test decreased and the scores on nurse self-efficacy for mathematics scale also decreased. the demographic item of “Hours a nurse worked in one week” had the greatest significance. the more hours a nurse worked the lower their score was on the medication calculation test. This study agrees with others that nurses are not good at mathematics. This study also correlated that as the number of hours worked increased so did the medication calculations errors. and many nurses have a measurable level of anxiety about mathematics and dosage calculations and this may influence ...
Contributing Partner: UNT Libraries
Matlab Implementation of a Tornado Forward Error Correction Code

Matlab Implementation of a Tornado Forward Error Correction Code

Date: May 2011
Creator: Noriega, Alexandra
Description: This research discusses how the design of a tornado forward error correcting channel code (FEC) sends digital data stream profiles to the receiver. The complete design was based on the Tornado channel code, binary phase shift keying (BPSK) modulation on a Gaussian channel (AWGN). The communication link was simulated by using Matlab, which shows the theoretical systems efficiency. Then the data stream was input as data to be simulated communication systems using Matlab. The purpose of this paper is to introduce the audience to a simulation technique that has been successfully used to determine how well a FEC expected to work when transferring digital data streams. The goal is to use this data to show how FEC optimizes a digital data stream to gain a better digital communications systems. The results conclude by making comparisons of different possible styles for the Tornado FEC code.
Contributing Partner: UNT Libraries
A Matter of Due Process: An Examination of How State Mandated Accreditation has Impacted Texas Crime Laboratories

A Matter of Due Process: An Examination of How State Mandated Accreditation has Impacted Texas Crime Laboratories

Date: May 2008
Creator: DeLillo, Sandy Dawn
Description: Mandated accreditation of crime laboratories is a fairly new phenomenon. The state of Texas was the first to require that crime laboratories be accredited in order to be able to present evidence in a criminal proceeding. The laws that govern this are Texas House Bill 2703 and Texas House Bill 1068. The goal of this study is see how the enactment of these laws impacted crime laboratories. There are 42 crime laboratories that are accredited in the state of Texas. This study was conducted by the use of telephone survey interviews. Results indicated that mandated accreditation is a step in the right direction to ensure that objectivity is maintained during the processing and evaluation of physical evidence.
Contributing Partner: UNT Libraries
A Matter of Life and Death: The Continuity of Identity in the Fiction of Edgar Allan Poe

A Matter of Life and Death: The Continuity of Identity in the Fiction of Edgar Allan Poe

Date: August 1972
Creator: Hayes, Kathryn Janette
Description: Some of the most interesting facets of Edgar Allan Poe's fiction are his imaginative speculations concerning the metaphysical experiences of the soul, the individual psychic "identity." His interest focuses primarily on three related aspects of the soul's experiences (1) metempsychosis (or reincarnation and transmigration); (2) suspension between "death" and the after-life or states of unconsciousness and consciousness, sleep and waking; and (3) the terrors, real or imagined, of premature burial.
Contributing Partner: UNT Libraries
The Matters of Troy and Thebes and Their Role in a Critique of Courtly Life in Chaucer and the Gawain-Poet

The Matters of Troy and Thebes and Their Role in a Critique of Courtly Life in Chaucer and the Gawain-Poet

Date: May 1999
Creator: Jones, Oliver M.
Description: Both Chaucer and the Gawain-poet use the Matters of Troy and Thebes as material for a critique of courtly life, applying these literary matters to the events and actions in and around Ricardian England. They use these classical matters to express concerns about the effectiveness of the court of Richard II. Chaucer uses his earlier works as a testing ground to develop his views about the value of duty over courtly pursuits, ideas discussed more completely in Troilus and Criseyde. The Gawain-poet uses the Matter of Troy coupled with the court of King Arthur to engage in a critique of courtly concerns. The critiques presented by both poets show a tendency toward duty over courtly concerns.
Contributing Partner: UNT Libraries
The Maturing Emotion of George Eliot

The Maturing Emotion of George Eliot

Date: 1943
Creator: Botsford, Helen Virginia
Description: This study has been made in an attempt to illustrate how the genius that was George Eliot developed, how a magnificent intellect was driven first to achievement by emotional frustration and then was coupled with emotional maturity in person, developing emotional maturity in the creative artist and producing at last the supreme and delicate balance of intellectual and emotional maturity in the philosopher who found her medium in creative art.
Contributing Partner: UNT Libraries
Max Aub as a Dramatist

Max Aub as a Dramatist

Date: August 1962
Creator: Washington, Jessie Langston
Description: The purpose of this thesis is to make an intensive study of the dramatic works of Max Aub in order to determine his significance as a playwright.
Contributing Partner: UNT Libraries
Maximum Likelihood Estimation of Logistic Sinusoidal Regression Models

Maximum Likelihood Estimation of Logistic Sinusoidal Regression Models

Date: December 2013
Creator: Weng, Yu
Description: We consider the problem of maximum likelihood estimation of logistic sinusoidal regression models and develop some asymptotic theory including the consistency and joint rates of convergence for the maximum likelihood estimators. The key techniques build upon a synthesis of the results of Walker and Song and Li for the widely studied sinusoidal regression model and on making a connection to a result of Radchenko. Monte Carlo simulations are also presented to demonstrate the finite-sample performance of the estimators
Contributing Partner: UNT Libraries
Maximum-Sized Matroids with no Minors Isomorphic to U2,5, F7, F7¯, OR P7

Maximum-Sized Matroids with no Minors Isomorphic to U2,5, F7, F7¯, OR P7

Date: May 2000
Creator: Mecay, Stefan Terence
Description: Let M be the class of simple matroids which do not contain the 5-point line U2,5 , the Fano plane F7 , the non-Fano plane F7- , or the matroid P7 , as minors. Let h(n) be the maximum number of points in a rank-n matroid in M. We show that h(2)=4, h(3)=7, and h(n)=n(n+1)/2 for n>3, and we also find all the maximum-sized matroids for each rank.
Contributing Partner: UNT Libraries