Students’ struggle with learning mathematics is often cast in a negative light. Mathematics educators and researchers, however, suggest that struggling to make sense of mathematics is a necessary component of learning mathematics with understanding. In order to investigate the possible connection between struggle and learning, this study examined students’ productive struggle as students worked on tasks of higher cognitive demand in middle school mathematics classrooms. Students’ productive struggle refers to students’ “effort to make sense of mathematics, to figure something out that is not immediately apparent” (Hiebert & Grouws, 2007, p. 287) as opposed to students’ effort made in despair or frustration. As an exploratory case study using embedded multiple cases, the study examined 186 episodes of student‐teacher interactions in order to identify the kinds and nature of student struggles that occurred in a naturalistic classroom setting as students engaged in mathematical tasks focused on proportional reasoning. The study identified the kinds of teacher responses used in the interaction with the students and the types of resolutions that occurred. The participants were 327 6th and 7th grade students and their six mathematics teachers from three middle schools located in mid‐size Texas cities. Findings from the study identified four basic types of student struggles: get started, carry out a process, give a mathematical explanation, and express misconception and errors. Four kinds of teacher responses to these struggles were identified as situated along a continuum: telling, directed guidance, probing guidance, and affordance. The outcomes of the student‐teacher interactions that resolved the students’ struggles were categorized as: productive, productive at a lower level, or unproductive. These categories were based on how the interactions maintained the cognitive level of the implemented task, addressed the externalized student struggle, and built on student thinking. Findings provide evidence that there are aspects of student‐teacher interactions that appear to be productive for student learning of mathematics. The struggle‐response framework developed in the study can be used to further examine the phenomenon of student struggle from initiation, interaction, to its resolution, and measure learning outcomes of students who experience struggle to make sense of mathematics. / text

Increasingly, predictive models are used to support routine business de- cisions and are integral to the strategic competitive business strategies for a wide range of industries. Most often, data-driven predictive models are in- duced from training data obtained through the businesss routine operations. However, recent research on policies for intelligent information acquisitions suggests that proactive acquisition of information can improve models at a lower cost. Most active information acquisition policies are accuracy centric; they aim to identify acquisitions of training data that are particularly benefi- cial for improving the predictive accuracy of a given model. In practice, however, inferences from a predictive model are often used along with inferences from other predictive models as well as constant factors to inform arbitrarily complex decisions. In this dissertation, I discuss how these settings motivate a new kind of collaborative information acquisition (CIA) policies that exploit knowledge of the decision to allow multiple predictive models to collaboratively prioritize the prospective information acquisitions, so as to best improve the decisions they inform jointly. I present a framework for CIA policies and two specific CIA policies: CIA for binary decisions (CIA-BD), and CIA for top-ranked opportu- nities in terms of expected revenue (CIA-TR). Extensive empirical evaluations of the policies on real-world data suggest that the notion of CIA policies is indeed a valuable one. In particular, I demonstrate that these two new poli- cies lead to superior decision-making performances as compared to those of alternative policies that are either decision-centric or do not allow multiple models to collaboratively prioritize acquisitions. The performance exhibited by the CIA policies suggest that these policies are able to effectively exploit knowledge of the decisions to avoid greedy improvements in accuracy of any individual model informing the decisions; instead, they promote improvements in any one or all of the models when such improvements are likely to benefit the decisions. / text

The purpose of this study was to evaluate the utility of the Adaptive Tasks Framework for assessing parental needs when providing primary care for their child with a chronic health condition. A qualitative descriptive methodology framed the study and two methods were employed to collect data: a secondary analysis of existing interview data from seven parents of children with chronic health conditions and interviews with four parents who were currently providing primary care for their child with a chronic health condition. The data was analyzed using content analysis, whereby interview data was explored to determine if it fit into one or more of the eight adaptive tasks categories. Parents reported needs in all of the eight adaptive tasks categories, with the need for information regarding their child's chronic health condition being the foremost concern among parents. The need for caring, empathetic, and patient health care professionals who are sympathetic to the informational needs of parents, while at the same time acknowledging their expertise, was the second need expressed by the parents in this study. Implications of these findings for nurses is that the Adaptive Tasks Framework provides a useful tool for assessing parental needs when managing their child's chronic health condition and for determining areas in which the parents may require support.

ABSTRACT PREPARATION OF THE ASSISTANT PRINCIPAL FOR THE ROLE OF THE PRINCIPAL: AN EXAMINATION OF REAL TASKS AS COMPARED TO THE PERCEIVED IDEAL TASKS by April Chastang Madden Principals most commonly ascend from the pool of those who are assistant principals, but it is unclear whether assistant principals are prepared to assume such a pivotal leadership role. This study seeks to compare the extent of on the job training provided to the assistant principals by examining ideal as compared to actual task performance in six competency areas associated with the job of principal. The research questions were as follows: 1. What are the perceived ideal professional tasks assistant principals should perform prior to becoming a principal? 2. Which tasks are performed by assistant principals? 3. Do these performed tasks prepare assistant principals for principalships? Utilizing Survey Monkey, a survey was e-mailed to principals with 1-3 years of experience in the State of Georgia. Descriptive statistics, Pearson Correlations, and t-tests were used for data analysis. As for research question 1, this study revealed that the tasks that ranked the highest among the study participants regarding perceived ideal tasks that assistant principals should perform prior to becoming principal were the competencies falling under the categories of Instructional Leader, Leadership in Staff Personnel, and Management of Schools. For question 2, Pearson Correlation showed that there were no significant correlations for ideal and actual tasks, except in the area of Instructional Leader. Regarding research question 3, The Pearson Correlation along with t-tests of subscales showed that there are significant differences between the ideal and actual tasks performed by assistant principal. The Pearson Correlation highlighted that the only significant correlation between ideal and actual competency tasks was found in the area of Instructional Leader. In conclusion, this study indicated that assistant principals are not adequately prepared to transition to the role of principal.

The proliferation of small devices and the advancements in various technologies have introduced the concept of pervasive environments. In these environments, user tasks can be executed by using the deployed components provided by devices with different capabilities. One appropriate paradigm for building user tasks for pervasive environments is Service-Oriented Architecture (SOA). Using SOA, user tasks are represented as an assembly of abstract components (i.e., services) without specifying their implementations, thus they should be resolved into concrete components. The task resolution involves automatic matching and selection of components across various devices. For this purpose, we present an approach that allows for each service of a user task, the selection of the best device and component by considering the user preferences, devices capabilities, services requirements and components preferences. Due to the dynamicity of pervasive environments, we are interested in the continuity of execution of user tasks. Therefore, we present an approach that allows components to monitor locally or remotely the changes of properties, which depend on. We also considered the adaptation of user tasks to cope with the dynamicity of pervasive environments. To overcome captured failures, the adaptation is carried out by a partial reselection of devices and components. However, in case of mismatching between an abstract user task and a concrete level, we propose a structural adaptation approach by injecting some defined adaptation patterns, which exhibit an extra-functional behavior. We also propose an architectural design of a middleware allowing the task's resolution, monitoring of the environment and the task adaptation. We provide implementation details of the middleware's components along with evaluation results

Iš programuotojo perspektyvos, riba tarp aparatūrinės ir programinės įrangos sparčiai mažėja. Kol programuotojai stengiasi pasiekti reikalaujamą spartą šiuolaikinėms sistemoms, jiems teks išnaudoti alternatyvius skaičiavimų elementus, tokius kaip vaizdo plokštes. Šiame darbe apžvelgiama esama lygiagrečių skaičiavimų naudojant vaizdo plokštes situacija. Apžvelgiamas fizikos simuliacijos skaičiavimo uždavinių sprendimas panaudojant vaizdo plokštes kaip skaičiavimo vienetus. Analizuojant esamus produktus ir pritaikant technologijas paskirstytiems skaičiavimams naudojant OpenCL atliekami eksperimentai. Šie eksperimentai parodys teigiamas ir neigiamas, paskirstytų skaičiavimų fizikos uždaviniams spręsti, puses. / The line between hardware and software is shrinking. While programmers and developers desperately try to reach the required performance for applications that require huge computations, they will be forced to use multiprocessing. Not only using a CPU as a main computation unit, but other resources like GPU. In these theses we will review the current situation in multiprocessing using GPU‘s. An investigation of computation of physics will be carried out. While analyzing current products and applying technologies for GPU computation using OpenCL we will execute appropriate experiments. These experiments will show the up and down sides of GPU computing for specific physics tasks.

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In the field of second language acquisition, there are few studies focusing on Chinese English-as-an-additional-language (EAL) graduate students’ communication strategy use, strategy use across different disciplines, and the relationships between communication strategy use and learners’ speaking performance. To fill the gap identified in the literature reviewed, this study examined the communication strategies used by 11 Chinese EAL graduate students from the Departments of Electrical Engineering and Education in the completion of two informal debate tasks with a questionnaire adapted from Nakatani’s (2006) Oral Communication Strategy Inventory and two post-task communication strategy recall questionnaires. Results from the study indicate that participants used eight categories of communication strategies, with fluency-oriented strategies the most frequently used strategy category and translation the least frequently used strategy category. Advanced English-language proficiency level learners used more social affective, message reduction and alteration, and negotiation of meaning strategies than learners at high-intermediate proficiency levels, to a degree that was statistically significant. No significant difference was identified in the overall communication strategy use but in one instance of individual strategy use (i.e., clarifying stance) across two disciplines. Significantly positive relationships were identified among certain categories of communication strategies (i.e., social affective, negotiation of meaning, accuracy-oriented strategies, and message reduction and alteration strategies), individual strategies (i.e., turn yielding, exemplifying, clarifying meaning, correcting others, referring to notes for accuracy/fluency, message reduction and alteration), and participants’ speaking performance. In addition, the retrospective results from the post-task strategy recall questionnaires suggest that participants in this study are not fully aware of their communication strategy use. The findings in this study can inform language practitioners’ of communication strategies used by Chinese graduate students majoring in Electrical Engineering and Education. Implications and future research directions are discussed in light of the findings derived from the present study that can further contribute to research about EAL learners’ communication strategies used at the graduate level. / Graduate / 0290 / cihangzh@uvic.ca

The research study departs from the, angle that heads of department occupy an important position at the interface of management and delivery of education. Their functions range from teaching to managing the school's departments in a diligent way. It was assumed that failure for heads of department to be part of the leadership in the school and at the same time manage their department and engage in teaching duties would result in a school becoming dysfunctional. A literature study was conducted to explore the leadership and management functions of the heads of department and to investigate the specific challenges facing heads of department in technical high schools. The empirical research consisted of a questionnaire survey to determine the views of the heads of department on their management and leadership functions and the challenges they experience in executing their tasks. It involved 75 heads of department in 13 Technical High School in the North West Province. The major findings of the research study reveal that heads of department experience challenges with a heavy workload, find it difficult to strike a balance between teaching duties and management duties and also face challenges in executing their functions even if a job description exists. It was also revealed that respondents strongly agree with the African cultural perspective concerning the ideal leadership characteristics of heads of department. Generally the study indicated that heads of department require training aimed at meeting the specific needs of middle managers. / Thesis (M.Ed.)--North-West University, Potchefstroom Campus, 2010.

The research study departs from the, angle that heads of department occupy an important position at the interface of management and delivery of education. Their functions range from teaching to managing the school's departments in a diligent way. It was assumed that failure for heads of department to be part of the leadership in the school and at the same time manage their department and engage in teaching duties would result in a school becoming dysfunctional. A literature study was conducted to explore the leadership and management functions of the heads of department and to investigate the specific challenges facing heads of department in technical high schools. The empirical research consisted of a questionnaire survey to determine the views of the heads of department on their management and leadership functions and the challenges they experience in executing their tasks. It involved 75 heads of department in 13 Technical High School in the North West Province. The major findings of the research study reveal that heads of department experience challenges with a heavy workload, find it difficult to strike a balance between teaching duties and management duties and also face challenges in executing their functions even if a job description exists. It was also revealed that respondents strongly agree with the African cultural perspective concerning the ideal leadership characteristics of heads of department. Generally the study indicated that heads of department require training aimed at meeting the specific needs of middle managers. / Thesis (M.Ed.)--North-West University, Potchefstroom Campus, 2010.