Master of Music / School of Music, Theater, and Dance / Julie Yu-Oppenheim / This report is for the beginning choral music educator or music education student who seeks guidance when selecting repertoire for their advanced elementary or beginning middle school choir. I attended the 2011 Kansas Choral Directors Association conference. Conferences such as these are great resources for the novice choral educator and even the veteran teacher. Choral reading sessions are excellent ways to find new and quality repertoire, because the directors that select the music spend a good amount of time researching and selecting songs. In determining what factors directors use to choose repertoire for their choirs, a survey was developed and administered to forty Kansas music educators at one of the reading sessions which asked the following three questions: 1) What is the likelihood that you would use this song in a concert or program? The next two are questions in which I asked (these two were based on a ‘disagree or agree’ scale): ‘This song has good educational value for the students’ and ‘I can teach many elements of music within this song.’ Evidence is shown from other master educators of various levels that choosing appropriate, worthy, and challenging repertoire is crucial to the success of the choral program.

This paper aims to design a high-quality-factor suspending micro-inductor and to establish its equivalent circuit model for performance optimization. Two commercial software (Ansoft HFSS and Agilent ADS) are adopts to analysis the influences of quality factor on the geometric parameters and substrate materials. The designed micro-inductors are constructed by one bottom GSG electrode, two supporting copper vias and a spiral suspending copper conducting layer. As the simulated results of this research, the quality factor of the suspending micro-inductor is increased with the height of air gap, the thickness and width of suspending copper conducting layer and decrease with the number of turns, line space and outer diameter of suspending copper conducting layer. The influences of different shapes of the spiral suspending copper conducting layers on the quality factor of micro-inductors were also investigated. The simulation results well match to the theoretical prediction. Finally, this thesis has successfully derived two experiential formulas based on the analysis results to estimate quickly the inductance of the suspending micro-inductors with circular and square shape. Compared with the simulation results and realistic measurement results, these experiential formulas demonstrate 94-95% and 90% accuracies respectively.

A concerning situation has developed over the past few years where several tea estates had to close down due to high labour costs and low profitability. Solutions are desperately required to save these estates from further regression and to prevent others from joining their ranks. One solution is to redirect the tea factories from the current production of black tea to producing a value added commodity such as a high quality green tea extract with an increased market value. The aim of this study was to find an economically viable PPO inactivation method that can be implemented in existing tea factories for the production of high quality instant green tea. Further enhancement of quality may then be achieved by high throughput cultivar screening where those with a higher natural catechin to caffeine content will be favourable. Six different PPO inactivation methods (steaming, blanching, fluid bed drying, panfrying, grilling over direct heat and grilling over indirect heat) were explored. Four independent experiments were performed in duplicate with these six methods using fresh tea leaves donated by a tea estate in Tzaneen, South Africa. All samples were dried in a fluid bed drier and milled after PPO inactivation. Biochemical analysis of specific quality parameters followed where extractions from these green tea leaf samples were tested for theaflavin content, caffeine content, flavan-3-ol content, total free amino acid content, colour and taste. The six PPO inactivation methods were compared by data evaluation of the individual quality parameters where certain quality parameters carried a higher weight than others. For the purpose of this project, the catechin to caffeine ratio was the most important quality determinant to yield a high value IGT. Also, to prove effectiveness of the PPO inactivation method, low TF content was compulsory. All PPO inactivation methods explored proved successful in rapidly inactivating PPO enzyme. As hypothesised, a significant difference in biochemical composition is brought about between green teas produced by employing different PPO inactivation methods. Blanching was found to be the most efficient PPO inactivation method as well as the method resulting in the highest catechin to caffeine ratio (16.67:1 for 4 min blanch vs. 5.72:1 for 17 min FBD as determined by HPLC analysis). A freeze dried extract from a 1.5 minute blanched sample (IGT) was compared with foreign IGTs originating from Sri-Lanka, Kenya, China and India by HPLC analysis. A more than two fold greater catechin to caffeine ratio was obtained for the sample originating from the blanching method (9.08:1 vs. 2.81-5.02:1). A high quality, naturally low caffeine, instant green tea can therefore be produced by utilizing the blanching method of PPO inactivation. To allow for inter and intra cultivar screening, tentative identification of novel catechins (digallated catechins) and their HPLC retention times was done using HPLC-ESI-MS/MS. Potential HPLC retention times for EC-digallate were detected at tR 62.0 ± 0.2, 70.7 ± 0.1 and 76.7 ± 0.2 minutes while tR 64.6 ± 0.1 and 65.8 ± 0.1 minutes were detected for EGC-digallate. With this information at hand, cultivars of a higher quality, hence increased economical potential, can be identified upon confirmation by NMR. HPLC-ESI-MS/MS screening coupled with NMR confirmation is to be continued to detect several other novel flavan-3-ols that could not be detected in the 4 IGTs of different origin used in this study. This study gives an overview of the biochemical differences between green tea leaves prepared using six different PPO inactivation methods. The aim of this study was met by identification of the significant increase in quality brought about by PPO inactivation using the blanching method, which is also economical for use in Africa. Blanching of tea leaves caused a significant decrease in caffeine. Therefore, the 1st hypothesis, stating that the six polyphenol oxidase inactivation methods investigated will produce instant green teas with different catechin to caffeine ratios, is accepted. Also, a means to perform large scale screening of individual tea trees in Africa for their novel flavan-3-ol content was provided by tentative identification of these novel catechins by LC-MS. Thus, the 2nd hypothesis, stating that application of LC-MS will aid in the identification of HPLC retention times of compounds (novel catechins) from a crude extract, is also accepted. / Dissertation (MSc)--University of Pretoria, 2009. / Biochemistry / unrestricted

The aim of this research was to explore how examiners achieve and maintain high quality assessment during marking and moderation of the BGCSE (Botswana General Certificate of Secondary Education) Home Economics coursework in Botswana. In 2000, localization of the Cambridge Overseas School Certificate (COSC) to the Botswana General Certificate of Secondary Education (BGCSE) took place as per the recommendations of the Revised National Policy on Education (RNPE) document. This new certificate system, marked locally, allows for varied modes of assessment, with more emphasis being placed on continuous assessment. This also means that the assessment is school-based, with teachers centrally involved. As is procedure with this kind of assessment, it is subjected to moderation. However, implementation of this new assessment approach exposed, among other challenges, challenges in establishing dependability of teachers’ assessment, possible increase in teacher workload, teachers’ lack of expertise and confidence in undertaking the assessment scheme. This study, among other things, considers the forms of moderation used by the BGCSE to establish consistency in school-based assessment (SBA) and in so doing, it identifies that a dual form of moderation is used. The main research questions guiding this investigation were: <ul> <li>How are teachers and moderators trained so that they may be competent examiners?</li> <li>How is quality assured during marking of coursework?</li> <li>How does the examining body (BEC) Botswana Examination Council ensure that the examiners adhere to the quality control mechanisms?</li> </ul> This was a qualitative study and the sources of data were semi-structured interviews, document analysis and the research journal. The eight respondents who participated in this study were Home Economics teachers, moderators from senior secondary schools and subject experts from the examining body who were all non-randomly sampled from across the country. Purposive sampling was used based on the respondents’ characteristics relevant to the research problem. Data were analyzed using thematic content analysis to describe the phenomenon under inquiry and obtain detailed data. Major findings revealed inconsistencies between teachers and moderators’ marks, and that even though there are procedures that underpin a high quality assessment regime, there is little monitoring by the Botswana Examinations Council (BEC) to ensure adherence by the examiners. Other key concerns included examiners’ dissatisfaction about training and inadequate official support and guidance to equip them as competent examiners in general. / Dissertation (MEd)--University of Pretoria, 2009. / Science, Mathematics and Technology Education / unrestricted

Using integrated threat theory as a theoretical framework, this multiple case study analyzed the effects of threat and the perception of threat from immigrants on the attitudes of teachers toward their elementary school students. The study was conducted with teachers at five northern California schools. All of the teachers were experienced and well-trained, teaching in low-income neighborhoods with large immigrant populations. In support of integrated threat theory’s premise, results indicated that where threat was present or perceived, teachers’ words and reported teaching behavior indicated prejudicial attitudes toward students. The lack of threat corresponded to a lack of bias. It was found that teaching behavior that reflected prejudicial attitudes affected a number of areas of instruction. Specifically, teachers spent less time in informal interaction with students, limiting their familiarity with the children. Curricular decisions were affected in subtle ways, and there were examples of implicit bias in interaction. The report concludes with recommendations for practice and further research. Recommendations for policy are particularly important, as teacher education programs and school districts are both able to provide anti-bias training.

Mycobacterium tuberculosis (Mtb), a pathogenic bacterium, is the causative agent in the vast majority of human tuberculosis (TB) cases. Nearly one-third of the world’s population has been affected by TB and annually two million deaths result from the disease. Because of the high cost of medication for a long term treatment with multiple drugs and the increase of multidrug-resistant Mtb strains, faster-acting drugs and more effective vaccines are urgently demanded. Several metabolic pathways of Mtb are attractive for identifying novel drug targets against TB. Hence, a high quality genome-scale metabolic network of Mtb (HQMtb) was reconstructed to investigate its whole metabolism and explore for new drug targets. The HQMtb metabolic network was constructed using an unbiased approach by extracting gene annotation information from various databases and consolidating the data with information from literature. The HQMtb consists of 686 genes, 607 intracellular reactions, 734 metabolites and 471 E.C. numbers, 27 of which are incomplete. The HQMtb was compared with two recently published Mtb metabolic models, GSMN-TB by Beste et al. and iNJ661 model by Jamshidi and Palsson. Due to the different reconstruction methods used, the three models have different characteristics. The 68 new genes and 80 new E.C. numbers were found only in the HQMtb and resulting in approximately 52 new metabolic reactions located in various metabolic pathways, for example biosynthesis of steroid, fatty acid metabolism, and TCA cycle. Through a comparison of HQMtb with a previously published human metabolic network (EHMN) in terms of protein signatures, 42 Mtb metabolic genes were proposed as new drug targets based on two criteria: (a) their protein functional sites do not match with any human protein functional sites; (b) they are essential genes. Interestingly, 13 of them are found in a list of current validated drug targets. Among all proposed drug targets, Rv0189c, Rv3001c and Rv3607c are of interest to be tested in the laboratory because they were also proposed as drug target candidates from two research groups using different methods.

Millennial workers occupy the majority of employment positions worldwide, which is a concern to business leaders in the United States related to having knowledge and ability to train, motivate, and retain millennial employees. Using Gilbert's behavior engineering model as a conceptual framework, this multiple case study explored the strategies that business leaders used to motivate their millennial employees. The study population included 4 leaders of small restaurant businesses in eastern North Carolina. Data were collected from semistructured, face-to-face interviews using 7 open-ended questions and review of company documents, websites, and social media. Data were coded and analyzed following Morse's method of data analysis. Three themes emerged from data analysis: rewards and recognition, high-quality leader-member relationship, and professional development. The findings of this research are significant for small business leaders who want to implement effective motivational strategies to manage millennial employees to keep their organizations productive and profitable. The implications of this study for positive social change include the potential to help millennial workers grow in their careers, become financially stable, and develop into prospective leaders prepared to propel their organizations and societies in the future.

High-quality factor oscillators are often used in measurements of verysmall force since they exhibit an enhanced sensitivity in the narrow frequencyband around resonance. Forces containing frequencies outside this frequencyband are often not detectable and the total force acting on the oscillatorremains unknown. In this thesis we present methods to eciently use theavailable bandwidth around resonance to reconstruct the force from partialspectral information.We apply the methods to dynamic atomic force microscopy (AFM) wherea tip at the end of a small micro-cantilever oscillates close to a sample surface.By reconstructing the force between the tip and the surface we can deducedierent properties of the surface. In contrast, in conventional AFM only oneof the many frequency components of the time-dependent tip-surface forceallowing for only qualitative conclusions about the tip-surface force.To increase the number of measurable frequency components we developed Intermodulation AFM (ImAFM). ImAFM utilizes frequency mixing ofa multifrequency drive scheme which generates many frequencies in the response to the nonlinear character of the tip-surface interaction. ImAFM,amplitude-modulated AFM and frequency-modulated AFM can be considered as special cases of narrow-band AFM, where the tip motion can bedescribed by a rapidly oscillating part and a slowly-varying envelope function. Using the concept of force quadratures, each rapid oscillation cycle canbe analyzed individually and ImAFM measurements can be interpreted as arapid measurement of the dependence of the force quadratures on the oscillation amplitude or frequency. To explore the limits of the force quadraturesdescription we introduce the force disk which is a complete description of thetip-surface force in narrow-band AFM at xed static probe height.We present a polynomial force reconstruction method for multifrequencyAFM data. The polynomial force reconstruction is a linear approximativeforce reconstruction method which is based on nding the parameters of amodel force which best approximates the tip-surface force. Another classof reconstruction methods are integral techniques which aim to invert theintegral relation between the tip-surface force and the measured spectraldata. We present an integral method, amplitude-dependence force spectroscopy (ADFS), which reconstructs the conservative tip-surface force fromthe amplitude-dependence of the force quadratures. Together with ImAFMwe use ADFS to combine high-resolution AFM imaging at high speeds withhighly accurate force measurements in each point of an image. For the measurement of dissipative forces we discuss how methods from tomography canbe used to reconstruct forces that are a function of both tip position andvelocity.The methods developed in this thesis are not limited to dynamic AFM andwe describe them in the general context of a harmonic oscillator subject to anexternal force. We hope that theses methods contribute to the transformationof AFM from a qualitative imaging modality into quantitative microscopy andwe hope that they nd application in other measurements which exploit theenhanced sensitivity of a high-quality factor oscillator. / <p>QC 20130527</p>

As Taiwanese consumers¡¦ economic ability grew up and pursuing for housing quality expanded in the recent years, their high-quality furniture purchasing behavior has increased gradually .The current research mainly studied the relation between the stage of purchase process and the need for various product information as consumers purchase the high-quality furniture. The examples for the research were 60 students from the National Sun Yat-sen University. The current research applied a 3¡Ñ2 factorial experiment design. Where the purchasing three decision stages were: problem recognition, alternative evaluation and purchase decision, and the furniture category option were sofa of living room and bedding set of bedroom, general data regarding consumer¡¦s information search behavior on furniture purchase were collected in the process of the experiment. Important findings of the current are summarize as follows: (1) Among different purchasing stages, there was significant difference in information needs in terms of category and particular item. But no significant difference in preference for information sources between various furniture items neither among decision stages. (2) Furniture category was found to be a nonsignificant variable to information need and information source. (3) The interaction effect on information needs was found for the variable of decision stage and furniture category.

For the application of 4G wireless communication system, this thesis aims to develop a high-quality-factor and low-power-dissipation suspending micro-inductor using electrochemical deposition and surface micromachining technologies. This research presents three technical points to improve the quality factor and reduce the power dissipation of micro inductor, including (i) to adopt a low resistivity material (copper) as the conducting layer to decrease the Eddy current due to the skin effect and reduce the total series resistance and energy loss, (ii) to utilize a suspending structure to diminish the power loss through the substrate and (iii) to replace the silicon wafer with a high resistance substrate (Corning 7740) to compress effectively the power dissipation in high frequency operation. The implemented suspending micro-inductors were characterized by a commercial network analyzer (Agilent E5071C) under 0.5~20 GHz testing frequency range. All the inductances and quality factors of the micro-inductors proposed in this thesis are extracted by the Agilent ADS software. The optimized value of the quality factor is around to 24.9 and the corresponding inductance is equal to 5.43 nH .