This dissertation explores the claim that, in advanced capitalist countries like Canada, a powerful knowledge class is assuming increasing dominance within the social relations of production. Attached to such theories are claims of trends toward post-bureaucratic organizations, rising job complexity and autonomy, and increased power within operational and strategic decision-making processes. In my study I focus on Canadian “specialist” employees (professionals and semi-professionals) and managers. I present aggregated and disaggregated data from two Canadian surveys conducted in 1983 and 2004 and complement this with original interviews with information technology (IT) workers and engineers. I find a seeming paradox within the labour process of specialists and managers, with task-level autonomy declining even as job complexity and involvement in organizational decisions are rising. I provide evidence that imperatives for profit/cost effectiveness are leading to efforts to make specialist and managerial labour and knowledge more transparent, integrated, and manageable, but this is not the same as degradation or proletarianization. In contrast to my expectation, I find boundaries in the division of labour are durable despite this “socialization” of many labour processes. I argue that a specialist-and-managerial class (SMC) exists in Canada, and will continue to exist, though it is subordinate to and exploited by the capitalist elite even as it excludes and exploits the working class through occupational closure and credential barriers. The SMC is thus contradictory, internally heterogeneous and fraying at its borders, but simultaneously resilient. The resiliency comes via possession of specific strategic knowledge and consequent ability to secure rents and/or control specific organization assets via delegated authority. Resiliency is also structural, with management in many organizations retaining an interest in separating planning and design (“conception”), on the one hand, from process and completion (“execution”), on the other, in order to maximize efficiency and productivity through more centralized control.

Hydraulic fracture conductivity in ultra-low permeability shale reservoirs is directly related to well productivity. The main goal of hydraulic fracturing in shale formations is to create a network of conductive pathways in the rock which increase the surface area of the formation that is connected to the wellbore. These highly conductive fractures significantly increase the production rates of petroleum fluids. During the process of hydraulic fracturing proppant is pumped and distributed in the fractures to keep them open after closure. Economic considerations have driven the industry to find ways to determine the optimal type, size and concentration of proppant that would enhance fracture conductivity and improve well performance. Therefore, direct laboratory conductivity measurements using real shale samples under realistic experimental conditions are needed for reliable hydraulic fracturing design optimization. A series of laboratory experiments was conducted to measure the conductivity of propped and unpropped fractures of Barnett shale using a modified API conductivity cell at room temperature for both natural fractures and induced fractures. The induced fractures were artificially created along the bedding plane to account for the effect of fracture face roughness on conductivity. The cementing material present on the surface of the natural fractures was preserved only for the initial unpropped conductivity tests. Natural proppants of difference sizes were manually placed and evenly distributed along the fracture face. The effect of proppant monolayer was also studied.

Die Belastungsinkontinenz des Mannes ist eine häufige Komplikation der radikalen Prostatovesikulektomie. Abgewandelte Operationstechniken und Rekonstruktions-verfahren führen zu verbesserten postoperativen Kontinenzraten und weisen auf die Bedeutung einzelner Komponenten am urethralen Verschlussmechanismus hin. Im Vergleich zum weiblichen ist der männliche Harnkontinenzmechanismus nur ansatzweise verstanden. In der vorliegenden Arbeit werden die am urethralen Verschluss beteiligten Komponenten und ihre Verbindungen zu angrenzenden Strukturen makroskopisch und mikroskopisch analysiert und auf ihre funktionelle Bedeutung untersucht. Zehn konservierte Leichname wurden für Untersuchungen des männlichen Urogenitaltraktes genutzt, aus drei Becken wurden Organpakete für die Erstellung von mikroskopischen Schnittpräparaten entnommen. Die histologischen Untersuchungen konnten zeigen, dass die Form des Musculus sphincter urethrae externus im Transversalschnitt von der Schnitthöhe abhängig ist. Seine Fasern strahlen in die Faszie des Musculus levator ani ein. Auch die Fasern des Corpus perineale inserieren in die Faszie dieses Muskels. Anhand dieser Ergebnisse wird die zentrale Rolle des Musculus levator ani im männlichen Harnkontinenzapparat deutlich. Der eigentliche Verschlussdruck wird demnach durch den Musculus levator ani aufgebaut und durch das Corpus perineale von dorsal auf die Urethra übertragen. Die Aufgabe des Musculus sphincter urethrae externus wird nicht als primär aktiv, sondern als dynamisches Widerlager für die membranöse Urethra beschrieben. Außerdem geht die Arbeit auf die noch wenig erforschte Mediatorfunktion der glatten Muskulatur im männlichen Urogenitaltrakt ein. Diese Ergebnisse präzisieren die Vorstellung des Kontinenzmechanismus des Mannes als Zusammenspiel von unterschiedlichen Komponenten und geben Anlass, aktuelle Standardtechniken der Beckenchirurgie zu überdenken und den Fokus auf schonende bzw. rekonstruktive Operationsverfahren zu richten.

No description available.

A Large-Eddy Simulation (LES) methodology adapted to the resolution of high Reynolds number turbulent flows in supersonic conditions was proposed and developed. A novel numerical scheme was designed, that switches from a low-dissipation central scheme for turbulence resolution to a flux difference splitting scheme in regions of discontinuities. Furthermore, a state-of-the-art closure model was extended in order to take compressibility effects and the action of shock / turbulence interaction into account. The proposed method was validated against fundamental studies of high speed flows and shock / turbulence interaction studies. This new LES approach was employed for the study of shock / turbulent shear layer interaction as a mixing-augmentation technique, and highlighted the efficiency in mixing improvement after the interaction, but also the limited spatial extent of this turbulent enhancement. A second practical study was conducted by simulating the injection of a sonic jet normally to a supersonic crossflow. The validity of the simulation was assessed by comparison with experimental data, and the dynamics of the interaction was examined. The sources of vortical structures were identified, with a particular emphasis on the impact of the flow speed onto the vortical evolution.

Doctor of Education / This case study looks at the impact of closing an urban secondary school. It considers the experiences of the students, the staff and the parents. It does not argue with the decision to close the school but concentrates on the experience for those most closely involved. The thesis is guided by the main research question which is: “What is the impact of school closure on the various elements of a school community and is there a way to close a school and minimise this impact?” Supplementary questions seek to describe how the closure was undertaken and what factors can be identified which helped ease the transition for those involved. While seeking to develop theory grounded in the research the findings have also been informed by theory associated with grief, place attachment, emotion in the workplace and change. Unpublished primary documents such as transcripts of group interviews, responses to written questionnaires and minutes of meetings are the basic sources of data for this thesis. The researcher was an active participant in the closure and well known to all respondents. The thesis concludes that although keeping the school open for the final year was of benefit to the morale and adjustment of staff it was probably less beneficial for the students involved. It suggests that with proper counselling support and identification of the closure as a critical incident, a quick closure would help student learning outcomes and prevent teacher de-skilling. It also confirms the importance of a school, or probably any institution, in the emotional life of those associated with it. Note: The students in this study range in age from 13 to 18 years of age in Years 7 through to 12.

[Formulae and special characters in this field can only be approximated. See PDF version for accurate reproduction] In this thesis we investigate the properties of k-closures of certain finite permutation groups. Given a permutation group G on a finite set Ω, for k ≥ 1, the k-closure G(k) of G is the largest subgroup of Sym(Ω) with the same orbits as G on the set Ωk of k-tuples from Ω. The first problem in this thesis is to study the 3-closures of affine permutation groups. In 1992, Praeger and Saxl showed if G is a finite primitive group and k ≥ 2 then either G(k) and G have the same socle or (G(k),G) is known. In the case where the socle of G is an elementary abelian group, so that G is a primitive group of affine transformations of a finite vector space, the fact that G(k) has the same socle as G gives little information about the relative sizes of the two groups G and G(k). In this thesis we use Aschbacher’s Theorem for subgroups of finite general linear groups to show that, if G ≤ AGL(d, p) is an affine permutation group which is not 3-transitive, then for any point α ∈ Ω, Gα and (G(3) ∩ AGL(d, p))α lie in the same Aschbacher class. Our results rely on a detailed analysis of the 2-closures of subgroups of general linear groups acting on non-zero vectors and are independent of the finite simple group classification. In addition, modifying the work of Praeger and Saxl in [47], we are able to give an explicit list of affine primitive permutation groups G for which G(3) is not affine. The second research problem is to give a partial positive answer to the so-called Polycirculant Conjecture, which states that every transitive 2-closed permutation group contains a semiregular element, that is, a permutation whose cycles all have the same length. This would imply that every vertex-transitive graph has a semiregular automorphism. In this thesis we make substantial progress on the Polycirculant Conjecture by proving that every vertex-transitive, locally-quasiprimitive graph has a semiregular automorphism. The main ingredient of the proof is the determination of all biquasiprimitive permutation groups with no semiregular elements. Publications arising from this thesis are [17, 54].

Thesis (Ph. D.)--Columbia University, 1933. / Vita. Published also without vita.

Thesis (Ph. D.)--Columbia University, 1933. / Vita. Published also without vita.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 281-285). Available also in a digital version from Dissertation Abstracts.