Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2009. / Title from first page of PDF file (viewed June 16, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 118-130).

The current airspace configuration is highly structured, fixed and is less responsive to changes causing the overall system to lack the flexibility, adaptability, and responsibility needed to handle the increasing air traffic demands in the near future. The work presented in this thesis aims at improving the flexibility and adaptability of today's airspace management in Europe in a pretactical context. We focus on the development of a method to support a process of automatic generation of a sequence of sector configurations composed of predefined sectors. Airspace configurations should be dynamically adjusted to provide maximum efficiency and flexibility in response to demand fluctuations. We dynamically build configurations by combining existing elementary sectors. In this step, any sector combination which forms controllable airspace blocks is eligible and may be used during the day of operation. In this work, we developed efficient methods to solve DAC problem. We formulated and study the sectorization problem from an algorithmic point of view. We proposed methods based on a mathematical modeling and heuristic optimization techniques. We also introduced here an approach to evaluate the workload inside sectors.

Subjects comprised four groups including: 73 judges; 90 family law practitioners; 38 psychologists; and 43 psychology graduate students. The subjects completed surveys designating the five most relevant and the five least relevant factors of effective parenting from a list of 85 such factors. As hypothesized, the family law attorneys and family law judges generated similar clusters of factors while the results of the psychologists and psychology graduate students likewise clustered similarly. These results suggest the possibility of the existence of common cognitive structures used in the custody decision-making process. Results could be used in the modification and refinement of the Custody Quotient (CQ) Technique. Future study could focus more specifically on the cognitive structures particular subjects use in making custody decisions.

Fred Dretske (1981) claimed that the essence of the kind of cognitive activity that gives rise to Intentional mental states is a process by which the analogue information coming from a source-object is transformed into digital form. It is this analogue-to-digital conversion of data that enables us to form concepts of things. But this achievement comes with a cost, since the conversion must involve a loss of information. The price we pay for the lost information is a proportional diminishment in our ability to discriminate the source-object from others that may be similar to it. I argue that this fact underlies an important distinction between what a mental state may be about and to what the state may be directed, Aboutness and directedness are two of four Intentional dimensions on which this project concentrates. The other two are aspectual shape and misrepresentation. The distinction between aboutness and directedness is a part of a proposed approach to Intentionality based on the script theory of Roger Schank and Robert Abelson (1977). Scripts are schemata—organized knowledge structures that guide our understanding of the world around us. Schank and Abelson's basic ideas are extended to yield four different script-types: episodic (related to situations and events), instrumental (related to procedural knowledge), personal (representing an agent's goals and plans), and definitional (involved in object-recognition). The relationship between scripts and the Intentionality of thought is the main focus of this dissertation. An important secondary concern is the viability of externalism and internalism. It is argued that neither of these attitudes is independently adequate to provide a full account of Intentional content. Rather, the proper approach is to confine externalistic influences to aboutness and then characterize directedness in a manner that captures the world-according-to-the-agent. This strategy is implemented in the following way: aboutness is construed causally-evolutionarily; directedness is constructed with the help of the notion of an equivalence class; aspectual shape is shown to be a function of the kind of information a script provides; and an account of misrepresentation is given by comparing the different extensions generated from aboutness and directedness respectively. / Arts, Faculty of / Philosophy, Department of / Graduate

This research evaluated mental schema accuracy, user experience, and training methods of computer based tasks using educational software. Aims were to investigate the impact of mental schemas on individuals’ usability of technology and analyze the impact of training and user experience in terms of mental schemas and performance. Study one investigated schema accuracy as a predictor of perceived usability and mental workload; by analyzing the accuracy of users’ mental schema through task correctness. Task was found to be a significant predictor of the measures of usability, along with various demographic variables. When considering the effect of tasks, schema accuracy was a significant predictor of perceived usability and mental workload for task two (online quiz). Perceived usability showed lower values indicating higher perceptions of usability for task two and mental workload had lower values indicating reduced mental workload for task two. Significant, positive correlations were found between perceived usability and mental workload. Findings show schema accuracy as a preliminary measure of users’ subjective usability of non-problem solving tasks, based on the type of task tested and demographic data of students. Study two examined experience level (experienced and un-experienced) effects mental schema accuracy, robustness, completion time, and errors using three computer-based tasks. Experienced participants showed lower values for number of errors and robustness than un-experienced users. Significant, positive correlations were found between schema accuracy and completion time, and errors and completion time. The findings support the use of experience to analyze the impact of mental schemas and performance measures. Study three explored the change in training methods (no-training, paper, or video) on user changes in mental schema accuracy, robustness, completion times and errors. Training improved robustness, specifically paper-based training. Performance results showed that students who spent small periods of time using the software more times a week had made fewer errors and had more robust schemas. Demographic experience categories found that participants who spent more time using the software had fewer errors. Significant, positive correlations were found between schema accuracy and robustness. These results show that training improves mental schema robustness and reduces the number of errors while completing computer based tasks.

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Drawing from the meta-construct model of cognition (Ingram, 1984; Ingram & Kendall, 1986), the goal of the present study was to examine whether the structural (i.e., self-complexity; SC, Linville, 1985) and propositional components of schemas (dysfunctional attitudes; DAS, Weissman & Beck, 1978), independently and in interaction with each other and stressors, lead to changes in depressive symptoms. The prediction was that if negative self-attributes across different self-aspects in a specific domain, interpersonal or achievement, are highly distinct (i.e., high negative SC) or if positive self-attributes across different aspects of self are redundant (i.e., low positive SC), then the DAS would be more likely to lead to higher levels of depression when domain-congruent stressors occur. To test the main effect, two-way interaction, and three-way interaction hypotheses, the present study used a two month longitudinal design involving three assessment periods, separated by one month. At the baseline, a total of 189 students participated in the study. Of these students, 163 and 121 students participated in the first and second follow-ups, respectively. Multiple hierarchical regression analyses were used to examine two-way and three-way interactions. Results showed strong support for the predictive power of negative SC with respect to depressive symptomatology. The DAS, on the contrary, was a concurrent factor related to depressive symptoms. Further, the present study did not provide supportive evidence for the diathesis-stress model of depression. Although contradicting expectations, the pattern of relationships between interpersonal negative SC, DAS, distal stressors suggested promising venues for future research. / Ph. D.

Schema mapping is a challenging problem. It has come to the fore in recent years; there are important applications like database schema integration and, more recently, digital library (DL) merging of heterogeneous data. With Schema Mapper we demonstrate a semi-automatic tool for schema integration that combines a novel visual interface with an algorithm-based recommendation engine. We use ETANA-DL, a digital library developed to support integration of data from Near Eastern archaeology sites, as we explore integrating new collections. Schemas are visualized as hyperbolic trees, thus allowing more schema nodes to be displayed at one time. Matches to selections are recommended to the user, which makes the mapping operation easier and faster. Once the user has completed the mapping operation, a wrapper (XSLT Style Sheet) is created automatically with the mappings which can be applied to transform source XML files into target XML files. Schema Mapper allows editing the target schema as part of the process of incremental enrichment of the target schema. This involves operations like adding a node as a child, renaming a node, and deleting a node. The changes to the target schema also can be logged to disk. Schema Mapper has been applied to integrate the Megiddo Collection successfully into the ETANA-DL Union Catalog. It also has been applied for data-level mapping, to ensure consistency of data representation to the users who access the information through services provided by the DL. Formative evaluation and a preliminary comparison with MapForce suggest that Schema Mapper may be usefully employed for schema mapping. / Master of Science

This study examined the mediating role of Maladaptive Emotion-focused coping (MEFC) on the relationship between Early Maladaptive Schemas (EMS), anxiety and depression.