The use of metaheuristics for feature selection and the derivation of diagnostic rules

2019 ◽  
Author(s):  
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Jordan Stevens

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This dissertation includes four chapters that discuss 1) the history of metaheuristics, 2) the development of a genetic algorithm for feature selection, 3) the development of a genetic algorithm for deriving psychiatric diagnoses and 4) a demonstration of deriving shortened diagnostic rules for alcohol use disorder that optimally agree with the DSM-5. The first chapter offers an overview of novel developments in the metaheuristics literature, along with suggestions for future developments. The second and third chapters of this dissertation 1) propose new algorithms that can handle search spaces that are not accessible by current algorithms and 2) examine each component of the proposed algorithms to identify subordinate heuristics that are essential for the success of the algorithm. The final chapter utilizes information obtained from the previous two chapters to assess the performance of an algorithm for deriving diagnostic rules in a supervised learning context.

2015 ◽  
Author(s):  
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Youn-Joo Park

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Foreign correspondence now holds a tenuous position in the journalism industry because in midst of financial struggles, news organizations have been willing to axe the budget for international news. This study explored what the professional networks of foreign correspondents looked like when major U.S. newspapers devoted resources to bureaus abroad. In-depth interviews of fifty-four foreign correspondents from eighteen newspapers informed the history of international reporting from 1960 through 2013. The patterns of relationships were analyzed using the constant comparative method and the components identified in social network theory. The analysis on foreign correspondents' relationships with sources explored how their interactions abroad led to adjustments in journalistic practices and values and how their intrinsic personal identities influenced those relationships. Furthermore, this socio-historical study examined what influenced the foreign correspondents' working arrangements, including theoretical insights into the remote professional interactions with the home office, the typologies of working arrangements with helpers, the insider-outsider relationships with local journalists, and elite professional expat community of foreign correspondents. The research concludes by tying this information to the future of foreign correspondence.


2018 ◽  
Author(s):  
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Tung-Ying Wu

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] "This dissertation is a combination of three different projects. The first project investigates the history of philosophy: Kant's refutation of idealism. In this project I propose a more plausible interpretation of Kant's argument against idealism. Next, the second project investigates ethical theory: the ideal observer view. There, I criticize an argument for ideal observer view as untenable. Finally, the third project investigates decision theory: the decision problem: Psycho Buttons. I argue that causal decision theory supplemented with Full Information does not lead to intransitivity in Psycho Buttons. In this chapter I present an introduction to each project." --Introduction


2020 ◽  
Vol 77 ◽  
pp. 01001
Author(s):  
Alfian Akbar Gozali ◽  
Shigeru Fujimura

The University Course Timetabling Problem (UCTP) is a scheduling problem of assigning teaching event in certain time and room by considering the constraints of university stakeholders such as students, lecturers, and departments. The constraints could be hard (encouraged to be satisfied) or soft (better to be fulfilled). This problem becomes complicated for universities which have an immense number of students and lecturers. Moreover, several universities are implementing student sectioning which is a problem of assigning students to classes of a subject while respecting individual student requests along with additional constraints. Such implementation enables students to choose a set of preference classes first then the system will create a timetable depend on their preferences. Subsequently, student sectioning significantly increases the problem complexity. As a result, the number of search spaces grows hugely multiplied by the expansion of students, other variables, and involvement of their constraints. However, current and generic solvers failed to meet scalability requirement for student sectioning UCTP. In this paper, we introduce the Multi-Depth Genetic Algorithm (MDGA) to solve student sectioning UCTP. MDGA uses the multiple stages of GA computation including multi-level mutation and multi-depth constraint consideration. Our research shows that MDGA could produce a feasible timetable for student sectioning problem and get better results than previous works and current UCTP solver. Furthermore, our experiment also shows that MDGA could compete with other UCTP solvers albeit not the best one for the ITC-2007 benchmark dataset.


Author(s):  
Cynthia J. MacGregor ◽  
Jennifer Fellabaum

The purpose of this chapter is to describe the innovative Dissertation-in-Practice model being implemented in the University of Missouri Statewide Cooperative Doctoral Program in Educational Leadership (EdD Program). This doctoral program develops scholarly practitioners who are able to address critical problems of practice through the use of theory, inquiry, and practice-oriented knowledge. While these skills are utilized to create purposeful, professional products throughout the program, the redesigned Dissertation-in-Practice at MU is intended to further showcase the impact of the students' work as scholarly practitioners through dissemination-ready components. The chapter includes the history of the program and a description of the process through which program faculty redesigned the dissertation from a traditional five-chapter model to its current six section form. This restructuring, which includes dissemination to scholars and practitioners, is detailed. The chapter concludes with emerging supports for the scholarly practitioner graduates.


2014 ◽  
Author(s):  
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Dan Brigham

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Every time one sees |x-y|, one is looking at a specific metric acting on x and y, whatever they may happen to be, usually numbers or vectors. The notion of the distance between two objects is one of the most fundamental and ubiquitous in many branches of mathematics. A quasi-metric is a generalization of the familiar notion of metric. This dissertation examines what happens in this new setting of quasi-metrics. In particular, in the first chapter we introduce quasi-metrics, provide examples of them, then, given an arbitrary quasi-metric, develop a procedure which allows us to construct a better quasi-metric. Then we look at topological matters, such as openness and continuity. After that, we look at functions on abstract objects called groupoids, which is yet another step toward generality, since the objects we consider here contain the class of quasi-metrics. Dealing with groupoids is useful because it provides a natural structure into which quasi-metrics and quasi-norms fit. After these preliminary chapters, we then introduce linear structure, meaning the quasi-metrics studied are defined on sets in which one can add two points together, and multiply points by numbers, as this is not possible in an abstract set. Next we quantify smoothness of quasi-metric spaces, and throw in measures. For the first six chapters, we worked within a given quasi-metric space, assigning to points the distance between them. The seventh and final chapter deals with the "distance'' between two distinct quasi-metrics.


1948 ◽  
Vol 25 (3) ◽  
pp. 224-232
Author(s):  
Frank Luther Mott

This article on the old Life will appear as a chapter in the fourth volume of A History of American Magazines, the first three volumes of which brought Dean Mott, of the School of Journalism at the University of Missouri, the 1939 Pulitzer Prize for history. From 1930 to 1934 Dr. Mott was editor of the Quarterly.


2016 ◽  
Author(s):  
◽  
Maria Silvia Sarais

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The main topic of this dissertation is the first choral ode of Seneca's Oedipus. Seneca's handling of the choral parts has often suffered from negative criticism, mainly due to the fact that often, at first glance, the interventions of the chorus seem to not be an integral part of the play. For this reason, Seneca's choral odes have often been considered a mere display of the poets' rhetorical abilities, frequently dismissed as lyrical evasions, and occasionally even charged with being at odds with the context in which they are inserted. These types of assessments have been conducive to negative evaluations of Seneca's handling of the chorus, and of his dramatic competence, and have often been used to support the argument that Seneca's tragedies were not intended to be staged. My analysis shows that Seneca's variation of the poetic sources is never meaningless for the dramatic context, and argues that the chorus is an integral part of the play, one that is essential to fully understand and appreciate Seneca's dramatic art. By combining an intertextual approach and verbal analysis, I show that omissions, additions, and variations lead the audience to see the first ode as a symbolic account of Oedipus' destiny, one that prefigures the ways in which the tragic narrative is about to develop, and that prepares the audience to recognize the ways in which Seneca's poetic rewriting of Oedipus' myth is going to be original. The ode, in fact, displays the presence of a language that is highly ambiguous and multireferential, and that draws on the technical language of literary criticism and of programmatic statements of poetics. This language permits the audience to detect a meta-dramatic level of communication in the ode, one where Oedipus is characterized as a surrogate of the tragic poet. The final chapter provides evidence of the fact that all of the remaining odes display the same polysemous language that continues to sustain a meta-dramatic level of significance. My study shows that a recognition of metadrama in the odes is important in several ways. It increases the tragic irony. It complicates traditional notions of tragic fate, thereby providing an explanation for the apparent discrepancy between Seneca the Philosopher and Seneca the Tragedian that does not see the tragedies as the result of Seneca's retraction of his Stoic ideas. It offers an insight into Seneca's tragic poetics, while pointing to a possible reconciliation between Callimachean artistic skill and Bacchic inspiration. Finally, it points to a particular type of expected audience, one that is rational, literarily well-educated, and hence able to recognize all of the subtleties of the poets' sophisticated poetic enterprise.


2017 ◽  
Author(s):  
◽  
Audrey K. Madison

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Research on sex education regularly presents a polarized depiction of debate, which often puts parents on the defensive and condenses their viewpoints into incongruous, dichotomous camps. This study aims to challenge this rhetoric by presenting findings of nuanced parental viewpoints that frequently get over-simplified, and offers alternative explanations to these complex issues. Positioned within the history of American education in general and sex education in particular, it is further possible to see how vestiges of this history affect current school-led sex education and discussions about it. Through the teasing-out of parental opinions, it became clear that, on the most fundamental level, parents seem to agree that children need sex education. Results indicate that parents' own experiences with sex education play a major part in how they think of their role as sex educators with their children. Additionally, most parents express a desire to ensure their children are better informed and prepared than they were. Parents find their role as sex educator to be very important, although differences between fathers and mothers and parents of opposite sex children complicated this role. Acceptance of this role is a common theme, some parents more determined than others to educate their children about sex (but all acknowledging the feeling that they "have to"). Parents' descriptions of their strategies for sex education revealed differences in active versus passive approaches, questions of "how," "when," and "what" often complicating their approaches. Findings also show that parents have varying opinions on school-led sex education, but many are concerned with biases that may be conveyed in school. The notion that parents fall neatly on one side of the debate or the other is played with and challenged through the purposeful application of parental tropes. This practice revealed that parents do not precisely or consistently conform to these dichotomous boundaries. Finally, comparisons of New York, New York and Omaha, Nebraska demonstrate how schools can accommodate and assist parents in sex education by offering more complex options instead of either "opt in" or "opt out." By taking this approach, Omaha Public Schools district may be able to avoid future contentious arguments over sex education, although this remains to be seen. Throughout this paper, alternatives to the current literature are presented as a method of doing away with the common binary of comprehensive sex education versus abstinence only education. By examining parental opinions of sex education at home and at school, new ways of conducting sex education research are presented and justified.


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