Patterns in the floristic composition, stand structure, species richness and environmental characteristics of plant communities at a number of spatial scales were examined in Ku-ring-gai Chase National Park, New South Wales. Vegetation patterns in eastern Australia have often been related primarily to a single environmental variable, soil phosphorus concentration. This study examines the 'single nutrient' hypothesis regarding the distribution of plant species. If soil phosphorus concentration is the majot factor affecting the distribution of plant species, then this should be highly correlated with spatial patterns in the floristic composition of plant communities within the study area. Floristic composition was determined as the frequencies of all vascular species occuring within duplicate 500 m2 quadrants from fifty sites within the Park. Environmental data consisted of 21 variables, including soil physical and chemical characteristics, from each quadrant. The patterns in floristic composition and environmental factors are described and the relationships between composition and environment were examined. through indirect and direct gradient analyses. The measured environmental factors showed strong correlations with floristic patterns; however, two scales of species distributions were apparent: between and within soil type. Direct gradient analyses of composition and environmental data showed soil phosphorus concentration was inadequate in explaining the observed patterns in floristic composition of plant communities are a response to complex multivariable environmental gradients. The structural characteristics of vegetation stands were examined through the development of a multivariate approach to the classification of stand structure. This multivariate approach is essentially a modification of an existing scheme utilising foliage projective cover of various recognisable strata within the strands. Multivariate classification and ordinations of plant communities based on structural characteristics showed strong correspondence to that obtained by compositional analyses. The complex multivariable gradient hypothesis is supported from results examining stand structure-environment relationships. The relationship between species richness and richness of three growth-form types (tree, shrubs, and herbs) and environmental variables were examined through generalised linear models. The measured environmental variables showed strong relationships with species richness, consistent with the results found multivariately with floristic composition and stand structure. No single measured environmental variable adequately predicted the observed patterns in species richness, rather species richness showed strong relationships with complex multivariable environmental gradients. This study clearly demonstrates the the 'single-nutrient' or 'phosphorus' hypothesis is inadequate in explaining all the patterns in the various components of vegetation within Ku-ring-gai Chase National Park. The complex multivariable environmental gradient hypothesis suggested by the relationships between floristic composition and environmental variables is supported by the relationships exhibited by two other attributes of vegetation communities: stand structure and species richness. Further studies testing the significance of the complex multivariable environmental gradient hypothesis are required.

Patterns in the floristic composition, stand structure, species richness and environmental characteristics of plant communities at a number of spatial scales were examined in Ku-ring-gai Chase National Park, New South Wales. Vegetation patterns in eastern Australia have often been related primarily to a single environmental variable, soil phosphorus concentration. This study examines the 'single nutrient' hypothesis regarding the distribution of plant species. If soil phosphorus concentration is the majot factor affecting the distribution of plant species, then this should be highly correlated with spatial patterns in the floristic composition of plant communities within the study area. Floristic composition was determined as the frequencies of all vascular species occuring within duplicate 500 m2 quadrants from fifty sites within the Park. Environmental data consisted of 21 variables, including soil physical and chemical characteristics, from each quadrant. The patterns in floristic composition and environmental factors are described and the relationships between composition and environment were examined. through indirect and direct gradient analyses. The measured environmental factors showed strong correlations with floristic patterns; however, two scales of species distributions were apparent: between and within soil type. Direct gradient analyses of composition and environmental data showed soil phosphorus concentration was inadequate in explaining the observed patterns in floristic composition of plant communities are a response to complex multivariable environmental gradients. The structural characteristics of vegetation stands were examined through the development of a multivariate approach to the classification of stand structure. This multivariate approach is essentially a modification of an existing scheme utilising foliage projective cover of various recognisable strata within the strands. Multivariate classification and ordinations of plant communities based on structural characteristics showed strong correspondence to that obtained by compositional analyses. The complex multivariable gradient hypothesis is supported from results examining stand structure-environment relationships. The relationship between species richness and richness of three growth-form types (tree, shrubs, and herbs) and environmental variables were examined through generalised linear models. The measured environmental variables showed strong relationships with species richness, consistent with the results found multivariately with floristic composition and stand structure. No single measured environmental variable adequately predicted the observed patterns in species richness, rather species richness showed strong relationships with complex multivariable environmental gradients. This study clearly demonstrates the the 'single-nutrient' or 'phosphorus' hypothesis is inadequate in explaining all the patterns in the various components of vegetation within Ku-ring-gai Chase National Park. The complex multivariable environmental gradient hypothesis suggested by the relationships between floristic composition and environmental variables is supported by the relationships exhibited by two other attributes of vegetation communities: stand structure and species richness. Further studies testing the significance of the complex multivariable environmental gradient hypothesis are required.

Dans ce document, nous adressons le problème de la réécriture de requêtes avec des vues, en adoptant une perspective à la fois théorique et pratique. Dans le premier et principal chapitre, nous approchons le sujet de la recherche de toutes les reformulations minimales (sans atomes relationnels redondants) pour une requête relationnelle conjonctive, sous des contraintes d’intégrité qui incluent la relation entre les schémas source et cible. Nous présentons un nouvel algorithme, correct et complet, le Provenance-Aware Chase & Backchase, qui résout le problème des reformulations avec des performances significatives sur le plan pratique. Nous présentons sa caractérisation théorique détaillée, son implémentation optimisée et son évaluation, montrant des gains de performance jusqu’à deux ordres de grandeur par rapport à un SGBD commercial. Nous généralisons notre algorithme pour trouver directement des reformulations de coût minimum pour les fonctions de coût monotones, et montrons les gains de performance de cette adaptation. Avec notre algorithme, nous introduisons également un nouveau type de chase, la Provenance-Aware Chase, qui comporte son propre intérêt théorique, en tant que moyen de raisonnement sur l’interaction entre la provenance et les contraintes. Dans le deuxième chapitre, nous nous plaçons dans un contexte XML et nous revisitons le travail de Cautis, Deutsch and Onose sur problème de la réécriture de requêtes XPath par un seul niveau d’intersection de plusieurs vues. Nous étendons l’analyse de ce probleme en montrant ses connexions avec les problèmes de l’équivalence DAG-arbre et de la union-freeness d’un DAG. Nous raffinons un algorithme de réécriture proposé par Cautis, Deutsch and Onose pour obtenir une complexité polynomiale et améliorer sa complétude, et présentons un ensemble d’optimisations des procedures de réécriture, necessaires pour atteindre des performances pratiques. Nous fournissons une implementation complète comprenant ces optimizations ainsi que son evaluation experimentale extensive, montrant la performance et l’utilité de la technique polynomiale de réécriture. / In this work, we address the problem of query rewriting using views, by adopting both a theoretical and a pragmatic perspective. In the first and main chapter, we approach the topic of finding all minimal (i.e. with no redundant relational atoms) conjunctive query reformulations for a relational conjunctive query, under constraints expressed as embedded dependencies, including the relationship between the source and the target schemas. We present a novel sound and complete algorithm, the Provenance-Aware Chase & Backchase, that solves the minimal reformulations problem with practically relevant performance. We provide a detailed theoretical characterization of our algorithm. We further present the optimized implementation and the experimental evaluation thereof, and exhibit natural scenarios yielding speed-ups of up to two orders of magnitude between the execution of a best view-based rewriting found by a commercial DBMS and that of a best rewriting found by our algorithm. We generalize the Provenance-Aware Chase & Backchase towards directly finding minimum-cost reformulations for monotonic cost functions, and show the performance improvements this adaptation further enables. With our algorithm, we introduce a novel chase flavour, the Provenance-Aware Chase, which is interesting on its own, as a means of reasoning about the interaction between provenance and constraints. In the second chapter, we move to an XML context and revisit the previous work of Cautis, Deutsch and Onose on the problem of finding XPath query rewritings with a single level of intersection of multiple views. We enrich the analysis of the rewriting problem by showing its links to the problems of DAG-tree equivalence and union-freeness. We refine the rule-based rewriting technique proposed by Cautis, Deutsch and Onose to ensure its polynomial complexity and improve its completeness, and present a range of optimizations on the rewriting procedures, necessary to achieve practical performance. We provide a complete implementation comprising these optimizations and a thorough experimental evaluation thereof, showing the performanceand utility of the polynomial rewriting technique.

This thesis explores how the discourse of complexity thinking can be used to foster emergence in curriculum and practice-based research. The curriculum-related exploration focused specifically on games of chase as one facet of early childhood curriculum. It investigated using complexity thinking firstly, to occasion emergence (that is, create a new phenomenon) in children’s games of chase at an early childhood centre and secondly, to describe this emergence. The research-related exploration focused on creating an emergent methodology which is underpinned by complexity thinking. In this thesis report, I present a series of emergent curriculum-related phenomena that arose during the explorations, that is, an emergent game, a local curriculum theory for games of chase, the concepts of local curriculum theory, curriculum design and curriculum dynamics, and a curriculum vision. I also present an understanding of emergent methodology and two methodological innovations in the form of the Research Data Management System and the Visual Summary. This research involved taking the role of a volunteer teacher-researcher-curriculum designer at an early childhood centre to play games of chase with children. This role was informed by and contributed to a curriculum design that focused on designing the teaching and learning environment to occasion emergence in learning and curriculum. The games of chase curriculum contributed to children’s learning, my own learning and the general rhythm of life at the centre. The children learnt to distinguish between children who were playing and those who were not. They also learnt different ways to tag people in a game. In addition, the children and I developed a game playing routine before playing each game. This routine involved putting on tag belts, discussing what game we were playing and how we were going to play it. We played three different games of chase, starting with tag, followed by What is the time Mr(s) Wolf?, and finally the emergent game Big A, Little A. The stories of emergence are described in visual, descriptive and narrative texts organised into curriculum stories, teaching stories and children’s learning stories. Curriculum stories describe the activities that unfolded. Teaching stories present stories of teaching while learning stories are stories of children’s learning. These stories represent views of the enacted curriculum as activity, teaching and learning respectively. Taken together, the stories present a description of the curriculum dynamics that unfolded at the centre in relation to games of chase. This thesis shows that a local curriculum theory for games of chase at the centre emerged from the complex interactions of curriculum design and curriculum dynamics that unfolded at the centre. It also articulates the emergent concepts of local curriculum theory, curriculum design and curriculum dynamics using the language of complexity. This thesis also presents the local curriculum theory as a curriculum vision. This vision involves a shift in thinking about curriculum as either a set “course to be run” or the “path created in the running” (currere) to embracing curriculum as both “the space for running” and currere. It is a vision that values both children’s and teachers’ interests, focuses on teachers and children exploring depth and breadth of a curriculum domain together, enables teachers to follow, generate and sustain children’s interest in the explorations, and is generative, flexible and future-focused. This thesis conceptualises an emergent methodology as a methodology for emergence which (1) involves the researcher actively striving to foster emergence in research, (2) is brought forth in the interactions between the designed and enacted facets of methodology, (3) is local to a particular research project, and (4) emerges from the interactions of several related strategies. This thesis can be seen as an attempt to change the language game of curriculum by using the language of complexity throughout the thesis. In so doing, it not only enables the reader to talk about the discourse of complexity thinking, it also enables the reader to experience the discourse and the emergence of the curriculum-related phenomena and the methodological innovations that are the focus of this thesis. Finally, this thesis argues that using the discourse of complexity thinking in teaching and research can be enabling. It can enable the teacher and/or researcher to be creative, flexible and ethical within the constraints of his/her professional and personal life.

Thesis (Ph. D.)--University of Michigan, 1957. / eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 378-390.

The archaeology of EeQw:1, a burial site near Chase in south central British Columbia, is a study of a recent Plateau site in territory inhabited ethnographically by Shuswap. In September 1960 a small field party sponsored by the National Research Council of Canada and the University of British Columbia excavated five burials from the desecrated site. All the interments were flexed, either to the left or to the right, and were placed in unmarked pits. Among the collections from EeQw:1 were many varied and finely fashioned artifacts including: chipped points and knives, jade celts, steatite pipes and carvings, antler digging stick handles and harpoons, antler carvings, bone awls, whale bone clubs, sea-shells, a birch bark container, copper ornaments and a wooden mask. An examination of assemblages of other Plateau sites indicated that material from Lytton, Kamloops, and the upper Columbia River in Washington corresponded most closely with the material from EeQw:1. A close correlation between the assemblage from EeQw:1 and one from Kamloops excavated by H. I. Smith, leads to a tentative proposal of four periods in the recent prehistory of the Kamloops - Chase Area. A review of published and unpublished sources of Plateau prehistory indicated many extra-areal influences, especially from the Coast. In the Canadian Plateau, a number of traits may be attributable to the Coast Salish, and include mortuary practices and artifacts. It has often been suggested that crematory burial practices in the Plateau could be traced to the Tsimshian via the Carrier; however, in the light of the probable antiquity of cremation burial in the Plateau, this position is no longer tenable. Using ethnographic accounts of Plateau societies, Ray has divided the culture area into six sub-areas. These divisions can also be demonstrated in the archaeological record. Finally, the study has raised a number of pertinent questions and problems concerned with Plateau prehistory. The answers to many of these queries may be gained through more fieldwork in any one of three selected locations: the Chilcotin, the Lytton to Lillooet region, and the Kamloops - Chase Area. / Arts, Faculty of / Anthropology, Department of / Graduate

The activity-based approach to the study of travel behavior implies a shift in focus from discrete trips to activities. A fundamental tenet of this approach is that individuals, when making their own activity-travel decisions, tend to interact with other members within a household. However, most activity-based research to date has been conducted at the individual level, but not at the household level. It is now well recognized that incorporating intra-household interactions is crucial to the development of improved activity-based models, which allow for more accurate travel demand forecasts and policy evaluations. In this context, the studies described in this dissertation have been conducted to explore several critical issues that have remained largely neglected in past studies. One such issue is the identification of joint participation in activity and travel episodes, due to the fact that most activity-travel surveys have failed to collect information on involved persons. In this dissertation, an integrated spatio-temporal GIS toolkit is initially developed to automatically identify and visualize (3D) joint activity/travel episodes. Such identification makes it possible to uniquely and directly incorporate intra-household interactions into studies of activity/travel behavior. The research described in this dissertation utilizes the 2003 CHASE (Computerized Household Activity Scheduling Elicitor) survey collected in the Greater Toronto Area. Several aspects of activity/travel behavior are investigated.. First, quantitative models are developed and estimated for investigating household activity time use patterns while capturing intra-household interactions. Second, the dynamics of household time use patterns are explored through descriptive analysis and structural equations models. Finally, the household activity decision-making process is further delved into with a focus on the planning priority of joint activities. Overall, the research presented in this dissertation makes important contributions to activity-based time use and travel behavior research: (1) technically, the developed GIS toolkit is helpful to reduce costs of processing large activity-travel datasets; and (2) theoretically, the empirical results presented will form the basis toward the development and implementation of an improved activity-based model. / Thesis / Doctor of Philosophy (PhD)

Master of Music / Department of Music / Frank Tracz / This document is based on the preparation, rehearsal, and performance of selected pieces for the Graduate Conducting recital of Joshua D. Hankey. The pieces examined in the theoretical and historical analysis for this report are Ancient Voices by Michael Sweeney, The Headless Horseman by Timothy Broege and Cut to the Chase by Todd Stalter. This document also contains rehearsal plans and procedures for the preparation of the literature. The recital was performed on May 9, 2013 in the Santa Fe Trail Middle School Gymnasium on the campus of Santa Fe Trail Middle School, and was performed by the members of the Santa Fe Trail Middle School 7th grade Intermediate Band, and the Santa Fe Trail Middle School Concert Band.

This thesis presents a framework for understanding first-order theories by investigating their models. A common application is to help users, who are not necessarily experts in formal methods, analyze software artifacts, such as access-control policies, system configurations, protocol specifications, and software designs. The framework suggests a strategy for exploring the space of finite models of a theory via augmentation. Also, it introduces a notion of provenance information for understanding the elements and facts in models with respect to the statements of the theory. The primary mathematical tool is an information-preserving preorder, induced by the homomorphism on models, defining paths along which models are explored. The central algorithmic ideas consists of a controlled construction of the Herbrand base of the input theory followed by utilizing SMT-solving for generating models that are minimal under the homomorphism preorder. Our framework for model-exploration is realized in Razor, a model-finding assistant that provides the user with a read-eval-print loop for investigating models.

Thesis (M.A.) - Simon Fraser University, 2005. / Theses (Faculty of Education) / Simon Fraser University.