Low back pain (LBP) is a widespread problem affecting a number of people. Traditionally treated by nonoperative approaches the recent development of water currents and treadmills imbedded into pools has spurred physical therapists and athletic trainers to incorporate the use of aquatic therapy into their rehabilitation programs. OBJECTIVE: Determine if select trunk muscle activity levels are different in water-based exercises compared to land-based exercises. METHODS: 11 healthy male participants age 25.9 ± 5.53 years, whom did not have a history of and were not currently experiencing LBP or injury. Muscle activity was monitored via electromyography (EMG) at the rectus abdominis (RA), external oblique (EO), lower abdominals (LA), erector spinae (ES), and lumbar multifidis (MT). Each subject performed (1) maximum voluntary contractions (MVC’s), (2) land-based exercises, and (3) water-based exercises. A paired samples t test was used to compare abdominal bracing (ABbrace), abdominal hallowing (ABhol), Anterior/Posterior pelvic tilts (APTilts), and lateral pelvic tilts (LatTilts) between comparable land and water conditions; general linear model-repeated measures was run to compare the 11 different water exercises; ABbrace, ABhol, APTilts, LatTilts, physioball push down (PBPushDown), PB lateral flexion, PB transverse rotations, stationary marching, leg abduction, and wall sits with sagittal and transverse plane arm movements. Follow-up multiple comparisons (LSD) were performed between water exercises using a Holm’s corrected alpha level set at 0.05. RESULTS: Land-based exercises elicited greater EMG activity compared to water-based activities for all muscles (%MVC land vs. %MVC water): RA %MVC (8.3-19.3 vs. 2.1-9.7, P = .003-.029); LA %MVC (27-105 vs. 5.2-25, P = .001-.016); EO %MVC (13-59 vs. 4.8-24.5, P = .001-.303); ES %MVC (19.1-37.6 vs. 7.75-22.1, P = .001-.039) and MT %MVC (16-25.4 vs. 5.9-8.8, P = .00-.005). For water comparison ABbrace and PB exercises produced the most muscle activity while WallSitSag/Trans consistently produced the least muscle activity. CONCLUSION: Even with reduced muscle activity in the water, the calculated % mean MVCs were high enough (at or below 25% MVC) to provide muscle endurance and stability gains. With the information provided from the analysis of water exercise comparison, practitioners can effectively progress patients through a rehabilitation program.

In recent years, employing advanced oxidation processes (AOPs) as a means of wastewater remediation has emerged as a promising route towards maintaining a sustainable global water management program. The heterogeneous photocatalytic oxidation process has been of particular interest due to the prospective of utilizing solar radiation as the driving force behind the degradation of pollutants. Of the photocatalyst studied to date, TiO2 remains the most attractive material for environmental applications due to its affordability, stability, biocompatibility and high quantum yield. A key draw back however is roughly only 5% of solar radiation incident on earth can provide the energy required (3.0-3.2 eV) to generate the electron-hole pairs necessary for photo-oxidation. As a means to improve the process under solar irradiance, optical properties such as surface plasmon resonance of metallic nanoparticles and upconversion luminescence of rare earth ions have been exploited for improved light harvesting as well as the generation of more usable UV light from lower energy photons. In order to explore these phenomena and their role in the enhancement of this AOP, the photocatalytic degradation of organic dyes was studied under various conditions employing Degussa P25 TiO2 as the photocatalyst. Ag nanocubes, Ag-Pd core-shell nanoparticles and YAG:Yb+3,Er+3 served as the dopants for the various studies which resulted in enhanced degradation rates, insight into the applicability of utilizing Yb+3 as sensitizing ion under solar radiation and a novel core-shell nanoparticle synthesis.

Priming exercise, or the ‘warm-up’, is an accepted practice prior to exercise participation, physical training or sporting competition. Traditionally, low intensity exercise has been used prior to both short- and long-duration events in an effort to prepare the athlete, but not fatigue them. Recently, however, a more scientific approach to priming exercise has been considered important, with some research suggesting that a high intensity intermittent priming strategy may be optimal. However, given the paucity of performance focussed ‘warm-up’ studies, and that existing data regarding high-intensity priming strategies is inconclusive, the aim of this thesis was to determine the effects of three high-intensity intermittent priming strategies on physiological responses and subsequent 3km laboratory time-trial (TT) performance. Ten well-conditioned endurance-trained male cyclists (mean ± SD: age, 28.3 ± 8.4 yr, body mass, 81.8 ± 11.6 kg, stature, 1.8 ± 0.1 m, O2peak, 4.6 ± 0.5 L•min−1) were recruited for this study. After an initial incremental exercise test to exhaustion, participants completed four 3km time trials (TT) on four separate occasions, each preceded by a different priming strategy. These included a ‘self-selected’ (control) condition, and three high-intensity intermittent priming strategies of varying intensity (100% and 150% of the power at O2peak, and all-out) and fixed duration (15 minutes), each in predetermined random order. Five minutes passive rest separated each priming exercise condition from the experimental 3km-TT. Oxygen uptake ( O2) and heart rate (HR) were measured continuously, while blood lactate concentration ([BLa]) and core temperature (TC) were recorded at rest, post-priming exercise, and immediately prior to and following the 3km-TT. In an attempt to provide a mechanistic explanation for changes in performance, O2 kinetic variables were determined from the O2 data. Performance was quantified as a mean power (Wmean) and total time taken to complete the 3km-TT. Mean power output and time taken for each 500m segment of the 3km-TT were also calculated. Results demonstrated that the athletes self-chosen priming condition (378.6 ± 44.0 W) resulted in Wmean that was slightly greater than both the lowest (376.3 ± 44.9 W; 0.7%; p = 0.57) and moderate (373.9 ± 47.8 W; 1.5%, p = 0.30) intensity intermittent priming condition, but significantly greater than the ‘all-out’ intermittent sprint priming condition (357.4 ± 44.5 W; 5.8%, p = 0.0033). Similar differences were observed for time. While differences existed in the O2 deficit (however, mainly non-significant), these differences did not provide clear explanations for the differences in performance, with the moderate priming condition displaying a significantly reduced O2 deficit (59.4 ± 15.6 L, p < 0.05), despite the non-significant change in Wmean, compared to the self-chosen priming condition (73.3 ± 18.6 L). Additionally no significant differences were observed in either the time constant or the mean response time of O2. Significant findings with regard to HR, [BLa] and TC were observed, but consistent with O2 kinetic variables, they were not related to, nor explain performance changes. In conclusion, regardless of intensity, different high-intensity intermittent priming exercise did not improve 3km-TT performance more than the control condition (self-chosen). A priming strategy that is overly intense was detrimental to subsequent cycling performance. The observed finding that a self-chosen priming strategy resulted in a comparable performance suggests that athletes are able to self-select (consciously or sub-consciously) a ‘warm-up’ that is of appropriate intensity/duration. Further work utilising the priming strategies from the current study with events of shorter duration is required to further clarify how priming strategies of this nature may affect track cycling performance.

How do we shape our safety destiny? It is within the limits or our own making, that is, our capability. But, how do we know it is on the right track? In other words, how do we take the pulse? These questions set the context and scope of the research in which a number of key issues related to capability building and evaluation were addressed. In recent years, the approach of capability development has been widely researched by economists, organizational psychologists and management theorists. Unfortunately, because of its complex nature, the assessment of capability in professional context has not been properly addressed in the literature. The problem is two-fold. First, is criticality, or more accurately the lack of understanding about what capabilities are critical to our future success. The second one is concerned with the evaluative aspects of capability development. Using safety management as a study platform, this research introduced a contingency model of “strategic capability development” (SCD) as a plausible alternative to some of the well-established approaches. To address the evaluation issues, an innovative method for assessing capability maturity was constructed. The key variables were based on people’s pro-activeness and their self-efficacy beliefs. Through meta-analysis, a set of critical capabilities or indicators was identified and used as the key variables for designing the survey instrument, the Safety Management Efficacy Scale (SMES). These variables included goal-setting, risk management, safety training, risk communication, and operation/administration capabilities. Hypotheses regarding the interactive effects of each of these critical capabilities were then derived and tested. The results suggest that a high degree of coherency among the key variables does exit. There is a positive and significant association between critical capabilities and goal-setting capability. The positive effects of risk management capability on safety pro-activeness are strong. In regards to how goal-setting capability influences pro-activeness, no conclusion can be drawn. Having taking the pulse, the capability maturity profile of the safety profession is examined. The proposed SCD framework and SMES instrument together provide a point of departure for conducting similar research, including but not limited to human resources development, people capability maturity assessment, training/curriculum development, and performance evaluation. / Doctor of Philosophy (PhD

This thesis study set as its objective to investigate the effect of a comprehensive intervention to develop strategic learners on participating teachers and students. The intervention, named CORE Program for Strategic Teaching and Learning, was implemented throughout the entire curriculum by every teacher in Grades 7 - 12 in the Classical School. A combination of qualitative and quantitative methodology was used for the study. Grade 7 students were chosen for research purposes. Teacher participants included both certified and non-certified individuals, all with degrees in their area of instruction, whose experience ranged from none to decades. The student population was atypical, as it was composed of very highly-achieving and above average students in a private school. A review of the literature was made in an attempt to determine the critical elements of strategic learning and the necessary components for a successful intervention. Metacognition, self-regulation, self-efficacy, attribution for success, learning goal orientation, motivation, volitional control, and learning strategies were found to be interactive processes within strategic learning. Borrowing from chaos theory, strategic learning was viewed as a complex web of interacting influences, from which one could not extract a particular element to examine. Therefore, the study attempted to implement an intervention that would affect all of the above-named skills and attitudes exemplified by strategic learners. Teachers involved accepted the intervention and utilized it within their teaching, showing progress in ease of inclusion with years of experience in the program. The study data showed that the intervention had a generally positive student learning effect on 17 out of 21 items surveyed, with statistical significance determined for five items. The intervention was equally effective with very high-achieving students as well as with the lowest achieving students in the population studied.

Rational magnetic flux surfaces in fusion (toroidal plasma confinement) devices can break the magnetic field lines and reconnect them in the form of magnetic islands. Formation of these magnetic islands can have a serious impact on the plasma confinement properties of the device. Islands can in general degrade the confinement by mixing up different regions of the plasma. However there has been experimental evidence of confinement improvement by island induced transport barriers, under certain conditions. Even though there are a large number of theoretical and experimental works on magnetic islands to date, there is clearly a paucity of convincing experimental understanding on the nature of behaviour of islands in plasma. This thesis reports detailed experimental studies conducted on the H-1NF heliac stellarator, to gain an in-depth understanding of magnetic islands and their influence in plasma confinement.¶ Work reported in this thesis can be mainly divided into three parts: (a) high resolution imaging of vacuum magnetic islands and flux surfaces of H-1NF, (b) accurate computer modeling of H-1NF magnetic geometry and (c) detailed experiments on magnetic islands in plasma configurations.¶ Electron-beam wire-tomography in the H-1NF has been used for the high resolution mapping of vacuum magnetic flux surfaces and islands. Point-to-point comparison of the mapping results with computer tracing, in conjunction with an image warping technique, has enabled systematic exploration of magnetic islands and surfaces of interest. A fast mapping technique has been developed, which significantly reduced the mapping time and made this technique suitable for mapping at higher magnetic fields.¶ Flux surface mapping has been carried out at various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields, by point-by-point matching with computer tracing results. This has helped in developing a best-fit computer model for H-1NF magnetic configurations, which can predict rotational transform correct to three decimal places. Results from plasma experiments on magnetic configuration studies are best explained by the new model.¶ Experiments with low order magnetic islands in plasma configurations yielded some new results. It has been observed that the low order magnetic islands (m = 2) near the core of the plasma serve as pockets of improved confinement region under favourable conditions. This results in significant profile modifications including enhancement of the radial electric field near the core to a large positive value. The characteristics of islands are found to be dependent on the plasma collisionality and the island width.¶ Experiments with a magnetic configuration which exhibits no vacuum islands, but the core rotational transform very close to low order rational value, show a spontaneous transition of the radial electric field near the core to a large positive value (nearly 5 kV/m), with a strong electric field shear (nearly 700 kV/m2) and localised improvement in confinement, during the discharge. Evidence indicates that the transition is driven by the excitation of low order magnetic islands near the axis during the plasma discharge, due to the modification of rotational transform profile by toroidal plasma currents. The situation is similar to the Core Electron-Root Confinement (CERC) observed during high temperature ECH plasma discharges on other helical devices. This result provides an experimental evidence for the hypothesis that the threshold conditions for observing CERC can be reduced by exciting magnetic islands near the core of the plasma.

This study deals with the problem of evaluating curriculum documents which prescribe or make recommendations for curricular change. In 1980 a number of state and national education authorities in Australia released documents which contained proposals for reformulating the curriculum. Several of these proposals took the form of prescribing or recommending a core curriculum while others opted for a whole curriculum approach to the problem of the selection and transmission of educational knowledge. Although these are presented as practical documents - as proposals for action - they also contain theoretical and ideological components which are usually understated. It is the contention of this study that the evaluation of such proposals should not be based solely on their pragmatic or technical aspects but that their theoretical adequacy and links with ideology should also be taken into consideration. To this end, four of these documents have been selected, two of each type of proposals, and are used to provide material to develop criteria for making evaluative decisions about the theoretical and ideological aspects of curriculum proposals. Internal criteria, based on an analysis of the coherence and consistency of curriculum proposals, are derived by relating the proposals to one of two general theories of education. External criteria derive from a meta-critique where an attempt is made to formulate broader propositions which recognise the existence of opposition among various assumptions and are inclusive of those in conflict.

The publication of the Curriculum Development Centre's discussion paper 'Core Curriculum for Australian Schools' in June 1980 stimulated discussion of the concept of core curriculum in Australia. The driving force came from the Foundation Director of the CDC, Dr Malcolm Skilbeck. This study discusses the themes and directions to which Skilbeck was committed through a study of his work prior to his return to Australia in 1975 and his subsequent writings. The study considers Skilbeck's work against general thinking on educational matters in Australia and overseas. The initial discussion centres on Skilbeck's work in the United Kingdom prior to 1975. This concludes that his views were moulded by his own research on the American progressive educator John Dewey and that Dewey's ideals of a democratic society moulded and sustained by a democratic core curriculum have been dominant in all Skilbeck's subsequent thinking. The study reviews the establishment, working and conclusions of the CDC Core Curriculum and Values Education Working Party. In two subsequent chapters, the study looks at Skilbeck's approach to cultural mapping and school-based curriculum development as the two fundamental Planks of his approach to the development and implementation of a core curriculum for Australian schools. The study shows that Skilbeck's concept of cultural mapping is helpful but does not succeed in providing an effective basis for the articulation of national guidelines. In consequence, the CDC did not succeed in providing a framework sufficient to hold together the infinite range of possibilities opened UP by school-based action. The study considers the limited published reactions to the CDC Paper. It notes that the termination of the CDC by the Committee for Review of Commonwealth Functions in early 1931 prevented the fuller dissemination and debate of the topic during 19S1 and subsequently. The study notes that responses were disaapointingly few and in many cases failed to address the central questions raised by the CDC paper, in particular the idea of national curriculum guidelines and their application through school-based curriculum development. The major responses came in the State of Victoria where local circumstances encouraged discussion of the issues raised by the CDC. The study concludes that the CDC discussion paper was a valuable stimulus to discussion of curricular foundations at the time it was released but represented a point of view that was not fully understood or appreciated at the time. It laid the foundation for the renaissance of the general concept as 'democratic curriculum' in 1986 and provides important indications of the potential for the development of the Participation and Equity Program.

<p>It exists today a widespread interest for employee satisfaction, much effort are used in companies to achieve job satisfaction within their employees. One theory that has received a great deal of publicity is Hackman & Oldhams Job characteristics model which addresses the </p><p>question of how companies can provide job satisfaction through organizational change. The foundation of the theory is that five core job characteristics are responsible for creating job satisfaction. The purpose of this paper is to study these characteristics through the employees and their boss and to determine how they believe these characteristics to affect employee satisfaction. The paper focuses on a company located in a branch widely known for low employee satisfaction. Through interviews with both employees and their boss certain </p><p>discrepancies has emerged. One of these discrepancies concern a job characteristic which in </p><p>the theory is acknowledged for having a big impact on employee satisfaction, however </p><p>employees rated this characteristic to be of very little importance for overall employee </p><p>satisfaction. Another discrepancy was found when the boss was to give his take on how to </p><p>create employee satisfaction. Both the theory and the employees rated one characteristic to be </p><p>of high importance for overall employee satisfaction, this view was not shared by the boss </p><p>which drastically downplayed the importance of that job characteristic on overall employee </p><p>satisfaction.</p>

<p>Research interests in the studies of complex systems have been booming in many disciplines for the last decade. As the nature of geographic environment is a complex system, researches in this field are anticipated. In particular, the urban street networks in the Geographic Information System (GIS) as complex networks are brought forth for the thesis study. Meanwhile, identifying the scale-free property, which is represented as the power law distribution from a mathematical perspective, is a hot topic in the studies of complex systems. Many previous studies estimated the power law distributions with graphic method, which used linear regression method to identify the exponent value and estimate the quality that the power law fits to the empirical data. However, such strategy is considered to cause inaccurate results and lead to biased judgments. Whereas, the Maximum Likelihood Estimation (MLE) and the Goodness of fit test based on Kolmogorov-Smironv (KS) statistics will provide more solid and trustable results for the estimations. Therefore, this thesis addresses these updated methods exploring the topological patterns of urban street networks from an analytical perspective, which is estimating the power law distributions for the connectivity degree and length of the urban streets. Simultaneously, this thesis explores the street networks from a visual perspective as well. The visual perspective adopts the large network visualization tool (LaNet-vi), which is developed based on the k-core decomposition algorithm, to analyze the cores of the urban street networks. By retrieving the spatial information of the networks from GIS, it actually enables us to see how the urban street networks decomposed topologically and spatially. In particular, the 40 US urban street networks are reformed as natural street networks by using three "natural street" models.</p><p>The results from analytical perspective show that the 80/20 principle still exists for both the street connectivity degree and length qualitatively, which means around 20% natural streets in each network have a connectivity degree or length value above the average level, while the 80% ones are below the average. Moreover, the quantitative analysis revealed the fact that most of the distributions from the street connectivity degree or length of the 40 natural street networks follow a power law distribution with an exponential cut-off. Some of the rest cases are verified to have power law distributions and some extreme cases are still unclear for identifying which distribution form to fit. The comparisons are made to the power law statement from previous study which used the linear regression method. Moreover, the visual perspective not only provides us the chance to see the inner structures about the hierarchies and cores of the natural street networks topologically and spatially, but also serves as a reflection for the analytical perspective. Such relationships are discussed and the possibility of combining these two aspects are pointed out. In addition, the future work is also proposed for making better studies in this field.</p>