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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Shift

George, Gittins 08 May 2013 (has links)
Using Eduard Manet and Alex Katz as an entry point into my work, I will discuss seven of my paintings in detail. I will examine formal structures within the work such as color and space and how they relate to the content. I will discuss ideas of voyeurism and notions of the gaze while examining film as a presence. Artifice, art history, desire, personal memory, nostalgia and everyday life are starting points for formal explorations within the work.
42

An exploratory evaluation of a prototype intervention designed to develop core Executive Function skills in young adolescents in school and with a focus on the Shift component

Darby, Susan January 2015 (has links)
Executive Function (EF) comprises general purpose control processes that regulate thoughts and behaviours. Underlying core skills have been identified, including Shift: the ability to move between mental states, operations, or tasks. Research implicates EF (and Shift specifically) in academic achievement and broader life functioning throughout the life span. Most attempts to develop EF skills directly have focused on memory aspects and/or younger children. Reported benefits are controversial and perhaps limited. This research tackles a particular gap: intervention with adolescent core EF skills, with a focus on Shift, in a typical educational setting. All participant sampling was by convenience. Two experts in EF and three local stakeholders guided intervention development. 22 mainstream Year 8 students (one tutor group) trialled the resulting intervention prototype. A teaching assistant facilitated the implementation, with the form tutor present to occasionally assist. Being an exploratory evaluation, this research used mixed methods with an emphasis on qualitative data. Semi-structured group interviews with experts and a stakeholder focus group were used during the development phase. Standardised baseline and retest data were collected up to three weeks before and four weeks after the implementation phase respectively: a half term's trial during morning form-time. This was complemented by semi-structured feedback interviews with the participating adults and eight students. Transcripts were analysed with Thematic Analysis and the researcher's diary with Content Analysis. The quantitative data were summarised with descriptive statistics and additionally analysed with nonparametric inferential statistics. The study extends available data describing the near benefits of EF intervention. It explores the likely utility of EF intervention both theoretically and from an implementation perspective.
43

Cyclic staff scheduling with a minimum shift change requirement.

January 1997 (has links)
Chan Tak Chun, Andrew. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references. / Abstract --- p.ii / Acknowledgements --- p.iv / Table of Contents --- p.v / Lists of Tables and figures --- p.vi / Chapter Chapter1 --- Introduction and Literature Review --- p.1 / Chapter Chapter2 --- Problem Formulation --- p.15 / Chapter Chapter3 --- Solution Method --- p.20 / Chapter Chapter4 --- Application to Air Cargo Company --- p.31 / Chapter Chapter5 --- Implementation --- p.45 / Chapter Chapter6 --- Conclusion --- p.53 / References --- p.R-l / Appendix A --- p.A-l / Appendix B --- p.B-l / Appendix C --- p.C-l
44

Post-Weld-Shift Measurement and Compensation in Butterfly Laser Modules

Hung, Yu-sin 11 July 2005 (has links)
We investigate the post-weld-shift(PWS) induced fiber alignment shift in butterfly laser packaging. For high-speed laser modules in lightwave communication systems, the butterfly laser modules are widely used. When laser welding is applied to assemble a butterfly package, it is usually necessary to have mechanical elements such as substrates, fiber ferrule, and clip of house materials to facilitate fiber handing and retention within the package. However, during the process, rapid solidification of the welded region and associated material shrinkage often cause a post-weld-shift between welded components. The PWS significantly affects the package yield. A novel measurement and compensation technique employing a high-magnification camera with image capturing system (HMCICS) to probe the post-weld-shift (PWS) induced fiber alignment shifts in high-performance butterfly-type laser module packages is studied. The results show that the direction and magnitude of the fiber alignment shifts induced by the PWS in laser-welded butterfly-type laser module packaging can be quantitatively determined and then compensated. The increased coupling efficiency after this PWS compensation was from 3% to 10%. This HMCICS technique has provided an important tool for quantitative measurement and compensation to the effect of the PWS on the fiber alignment shifts in laser module packages. Therefore, the reliable butterfly-type laser modules with a high yield and a high performance used in lightwave transmission systems can be developed.
45

Operators which are constant with respect to slant Toeplitz operators

Chen, Chien-chou 04 July 2006 (has links)
Let H be a separable Hilbert space and {e_n : n belong to Z} be an orthonormal basis in H. A bounded operator T is called the slant Toeplitz operator if <T ej , ei> =c2i−j , where c_n is the n-th Fourier series of a bounded Lebesgue measurable function on the unit circle T = {z belong to C : |z| = 1}. It has been shown [7] that T* is an isometry if and only if |fi(z)|^2 +|fi(−z)|^2 = 2 a.e. on T and if this is the case and fi belong to C(T), then either T is unitarily equivalent to a shift or to the direct sum of a shift and a rank one unitary, with infinite multiplicity (for the shift part, that is). Moreover, with some additional assumption on the smoothness and the zeros of fi, T* is similar to either the constant multiple of a shift or to the constant multiple of the direct sum of a shift and a rank one unitary, with infinite multiplicity. On the other hand, according to the terminologies in [10], an operator A that is constant with respect to a shift S if AS = SA and A S = SA . Therefore, in this article, we will study the operators that is constant with respect to T , i.e., bounded operator A satisfying AT = T A and A T = T A .
46

Butterfly Type Laser Module Package Using Notch Clip Approach

Hsu, Pu-hsien 06 July 2006 (has links)
A notch clip approach to compensate post-weld-shift(PWS) induced by laser welding process in butterfly type laser module packages is investigated. For high-speed laser modules in lightwave communication systems, the butterfly laser modules are widely used. When laser welding is applied to assemble a butterfly package, it is usually necessary to have mechanical elements such as substrates, fiber ferrule, and clip of house materials to facilitate fiber handing and retention within the package. However, during the laser welding process, rapid solidification of the welded region and associated material shrinkage often cause a post-weld-shift between welded components. The PWS significantly affects the package yield. A notch clip approach and measurements employing a high-magnification camera with image capturing system (HMCICS) to probe the PWS induced fiber alignment shifts and welding compensation on notch in high-performance butterfly-type laser module packages are studied. The results show that the direction and magnitude of the fiber alignment shifts induced by the PWS in laser-welded butterfly-type laser module packaging can be quantitatively determined and then compensated. The overall coupling efficiency after this PWS compensation was from 80¢H to 90¢H. This notch approach and HMCICS technique have provided an important tool for quantitative measurement and compensation to the effect of the PWS on the fiber alignment shifts in laser module packages. Therefore, the reliable butterfly-type laser modules with a high yield and a high performance used in lightwave transmission systems can be developed.
47

Stress induced wavelength shift of thin WDM thin film filter

Jiang, Jr-hau 06 July 2007 (has links)
Stress induced wavelength shift of thin film filter (TFF) were investigated. The substrate thickness of the TFF were greatly reduced by lapping to enhance the effects of stress. For CWDM TFF, no significant wavelength shift was observed by reducing their substrate thickness from 300 £gm to 70 £gm. Further, thermal stress caused by direct heating the thin TFF to 100¢J shows no effective changes of their optical characteristics. On the other hand, wavelength shifts induced by mechanical stress after reducing the substrate thickness of the DWDM TFF were observed. The maximum wavelength shift 3.8 nm was measured by lapping the substrate from 1mm to 120 £gm. Additional wavelength shifts of 3.5 nm were observed from the thin DWDM TFF if a lens fiber was brought into close contact with the thin DWDM TFF and was pushed forward for a distance of 45 £gm.
48

NONE

She, Jong-Chuan 27 July 2001 (has links)
NONE
49

Structures of some weighted composition operators on the space of square integrable functions with respect to a positive measure

Pan, Hong-Bin 12 June 2002 (has links)
Let T be the unit circle,(mu) be a Borel probability measure on T and (phi) be a bounded Lebesgue measurable function on T. in this paper we consider the weighted composition operator W(phi) on L^2(T,mu) defined by W(phi)f:=(phi)*(f(circle)(tau)), f in L^2(T), where (tau) is the map (tau)(z)=z^2, z in T. We will study the von Neumann-Wold decomposition of W(phi) when W(phi) is an isometry and (mu)<< m,where m is the normalized Lebesgue measure on T.
50

Measurement of isotope shifts, fine and hyperfine structure splittings of the lithium d lines

Walls, Johnathon R. January 2001 (has links)
Thesis (M. Sc.)--York University, 2001. Graduate Programme in Physics and Astronomy. / Typescript. Includes bibliographical references (leaves 119-126). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ66411.

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