<p>This study highlights a number of different aspects regarding uniforms and dress codes in the United Kingdom (UK) and Sweden. The study comprises three parts: a quantitative comparison of GCSE pass rates for schools in the UK that do and do not have school uniforms, a qualitative survey study of Scottish High School pupils' perceptions about their uniform and a qualitative interview study of Swedish teachers, administrators and pupils about their school dress, rules regarding school dress and school uniforms.</p><p>Regarding whether uniforms improved academic results by comparing GCSE pass rates in the UK we were unable to find conclusive evidence to suggest that schools which had uniform policies performed significantly better than other schools.</p><p>Regarding Scottish pupils’ perceptions of their uniforms, pupils from lower-educated backgrounds were more likely to perceive that they were told off by teachers about not wearing the correct dress. When asked whether pupils felt more equal compared to their peers, those from lower-educated background were more likely to think that uniforms do not help to level out class difference compared to pupils from better educated backgrounds. Regarding bullying, even though uniforms existed at the school studied bullying due to what pupils wore to school still existed and pupils perceived that bullying due to other factors such as physical appearance also occurred.</p><p>Regarding the results from interviews with teachers and administrators in the Swedish town studied, most teachers took a fairly relaxed attitude towards pupils’ dress although the dress code of not wearing outdoor clothes in High Schools was policed quite strongly. Teachers saw the issue of female pupils dressing overtly sexually as the biggest problem and this was dealt with on an individual level rather than a class level.</p><p>High school pupils’ opinions of their dress code varied. Some hated the school rule that they were not allowed to wear outdoor clothes, whereas for others it was not seen as a big deal. A number of pupils thought that what you wore in class does not affect their learning outcomes. Very few pupils thought that introducing a uniform would be a good idea. Pupils at Sixth Form College had a more mature attitude towards their dress and were able to reflect back on their experiences from High School. They did not think that the issue of dress was a major issue in Sixth Form College however this did vary slightly between the three schools studied. Pupils at two of the schools perceived the dress code of the third school as being more formal, but this was due mainly to prejudice according to a number of pupils. The large majority of Sixth Form College students thought that introducing school uniform would be a bad idea and that bullying would not be eradicated because pupils can always pick on other attributes, not just clothing. However there were a couple of Sixth Form College that thought that introducing it would be a good way to reduce peer-pressure to buy the right clothes in High School.</p><p> </p>

In this thesis, Finite Volume Weighted Essentially Non-Oscillatory (FV-WENO) codes for one and two-dimensional discretised Euler equations are developed. The construction and application of the FV-WENO scheme and codes will be described. Also the effects of the grid coefficients as well as the effect of the Gaussian Quadrature on the solution have been tested and discussed. WENO schemes are high order accurate schemes designed for problems with piecewise smooth solutions containing discontinuities. The key idea lies at the high approximation level, where a convex combination of all the candidate stencils is used with certain weights. Those weights are used to eliminate the stencils, which contain discontinuity. WENO schemes have been quite successful in applications, especially for problems containing both shocks and complicated smooth solution structures. The applications tested in this thesis are the Diverging Nozzle, Shock Vortex Interaction, Supersonic Channel Flow, Flow over Bump, and supersonic Staggered Wedge Cascade. The numerical solutions for the diverging nozzle and the supersonic channel flow are compared with the analytical solutions. The results for the shock vortex interaction are compared with the Roe scheme results. The results for the bump flow and the supersonic staggered cascade are compared with results from literature.

abstract: The U.S. Navy is interested in evaluating the dielectric performance of SF6 at 30 kHz in order to develop optimal bushing designs and to ensure reliable operation for the Very Low Frequency/ Low Frequency (VLF/LF) transmitting stations. The breakdown experiments of compressed SF6 at 30 kHz in the pressure range of 1-5 atm were conducted in both the uniform field (plane-plane gap) and the non-uniform field (rod-plane gap). To understand the impact of pressure on the breakdown voltage of SF6 at VLF/LF, empirical models of the dielectric strength of SF6 were derived based on the experimental data and regression analysis. The pressure correction factors that present the correlation between the breakdown voltage of SF6 at VLF/LF and that of air at 50/60 Hz were calculated. These empirical models provide an effective way to use the extensively documented breakdown voltage data of air at 60 Hz to evaluate the dielectric performance of SF6 for the design of VLF/LF high voltage equipment. In addition, several breakdown experiments and similar regression analysis of air at 30 kHz were conducted as well. A ratio of the breakdown voltage of SF6 to that of air at VLF/LF was calculated, from which a significant difference between the uniform gap and the non-uniform gap was observed. All the models and values provide useful information to evaluate and predict the performance of the bushings in practice. / Dissertation/Thesis / M.S. Electrical Engineering 2010

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第20157号 / 理博第4242号 / 新制||理||1610(附属図書館) / 京都大学大学院理学研究科数学・数理解析専攻 / (主査)准教授 照井 一成, 教授 岡本 久, 教授 長谷川 真人 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

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Yes / In the equivalent frequency-based model, the antenna array gain is utilised to characterise the frequency response of the beam squint effect generated by the antenna array. This impact is considered for a wide range of uniform linear array (ULA) and uniform planar array (UPA) designs, including those with and without tapering configurations. For a closer look at how the frequency response of the array adapts to the variations in the incidence angle of the signal, the bandwidth of the spectrum is varied and investigated. To study this effect, we have considered using the gain array response as an equivalent channel model in our approach. Beam squinting caused by distortion in the frequency response gain can be verified by one of two equalisers: a zero-forcing (ZF) equaliser or a minimum mean square error (MMSE) equaliser. Different cases with their analysis and results are studied and compared in terms of coded and uncoded modulations. / This work was supported in part by the Satellite Network of Experts V under Contract 4000130962/20/NL/NL/FE, and in part by the Innovation Program under Grant H2020-MSCA-ITN-2016 SECRET-722424.

Precise navigation of autonomous underwater vehicles (AUV) is one of the most important challenges in the realization of distributed and cooperative algorithms for marine applications. We investigate an underwater navigation technology that enables an AUV to compute its trajectory in the presence of unknown currents in real time and simultaneously estimate the currents, using range or distance measurements from a single known location. This approach is potentially useful for small AUVs which have severe volume and power constraints. The main contribution of this work is observability analysis of the proposed navigation system using novel approaches towards uniform observability of linear time-varying (LTV) systems. We utilize the notion of limiting systems in order to address uniform observability of LTV systems. Uniform observability of an LTV system can be studied by assessing finite time observability of its limiting systems. A new definition of uniform observability over a finite interval is introduced in order to address existence of an observer whose estimation error is bounded by an exponentially decaying function on the finite interval. We also show that for a class of LTV systems, uniform observability of a lower dimensional subsystem derived from an LTV system is sufficient for uniform observability of the LTV system. / Ph. D.

Yes / The results are presented from an experimental study to investigate three-dimensional turbulence structure profiles, including turbulence intensity and Reynolds stress, of different non-uniform open channel flows over smooth bed in subcritical flow regime. In the analysis, the uniform flow profiles have been used to compare with those of the non-uniform flows to investigate their time-averaged spatial flow turbulence structure characteristics. The measured non-uniform velocity profiles are used to verify the von Karman constant κ and to estimate sets of log-law integration constant Br and wake parameter П, where their findings are also compared with values from previous studies. From κ, Br and П findings, it has been found that the log-wake law can sufficiently represent the non-uniform flow in its non-modified form, and all κ, Br and П follow universal rules for different bed roughness conditions. The non-uniform flow experiments also show that both the turbulence intensity and Reynolds stress are governed well by exponential pressure gradient parameter β equations. Their exponential constants are described by quadratic functions in the investigated β range. Through this experimental study, it has been observed that the decelerating flow shows higher empirical constants, in both the turbulence intensity and Reynolds stress compared to the accelerating flow. The decelerating flow also has stronger dominance to determine the flow non-uniformity, because it presents higher Reynolds stress profile than uniform flow, whereas the accelerating flow does not. / Major State Basic Research Development Grant No. 2013CB036402.

Spätestens seit der Tagung „Staat Macht Uniform“ in Münster 2010 gilt die „Uniformenkunde“ nicht mehr als Liebhaberei von Militärgeschichtsfreunden, die Paspelierungen, Knöpfe und Schulterstücke akribisch dokumentieren. Auch die Militärgeschichte, die in Deutschland durch die Rolle der Wehrmacht im Zweiten Weltkrieg bis in die 1990er Jahre eher ein Schattendasein führte, was den breiten geschichtswissenschaftlichen Fachdiskurs betraf, wird inzwischen mit der Sozial-, Kultur-, Kommunikations- und Geistesgeschichte verbunden und gilt als innovativer Zweig der Geschichtswissenschaft: Neue Fragen werden gestellt, neue Antworten gegeben.

ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / Traditional angle of arrival algorithms operate with uniform receiver arrays. Non-uniform arrays typically introduce significant elevation of computation complexity. This paper utilizes the double-integration method for the accurate estimation of the angle of arrival with non-uniform receiver arrays, while maintaining high computation efficiency. Because of the simplicity, the double-integration method is not significantly affected by the increase of the number of receivers or the non-uniform configuration. This approach allows us to perform high-speed high-accuracy estimation of the two-dimensional bearing angle without the constraints of structured receiver arrays, which is important to the realization of real-time tracking of mobile acoustic sources.