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Internal crossflow is an important element to actual gas turbine blade cooling; however, there are very few studies in open literature that have documented its effects on turbine blade film cooling. Experiments measuring adiabatic effectiveness were conducted to investigate the effects of perpendicular crossflow on a row of 45 degree compound angle, cylindrical film cooling holes. Tests included a standard plenum condition, a baseline crossflow case consisting of a smooth-walled channel, and various crossflow configurations with ribs. The ribs were angled to the direction of prevailing internal crossflow at 45 and 135 degrees and were positioned at different locations. Experiments were conducted at a density ratio of DR=1.5 for a range of blowing ratios including M=0.5, 0.75, 1.0, 1.5, and 2.0. Results showed that internal crossflow can significantly influence adiabatic effectiveness when compared to the standard plenum condition. The implementation of ribs generally decreased the adiabatic effectiveness when compared to the smooth-walled crossflow case. The highest adiabatic effectiveness measurements were recorded for the smooth-walled case in which crossflow was directed against the spanwise hole orientation angle. Tests indicated that the direction of perpendicular crossflow in relation to the hole orientation can significantly influence the adiabatic effectiveness. Among the rib crossflow tests, rib configurations that directed the coolant forward in the direction of the mainstream resulted in higher adiabatic effectiveness measurements. However, no other parameters could consistently be identified correlating to increased film cooling performance. It is likely that a combination of factors are responsible for influencing performance, including internal local pressure caused by the ribs, the internal channel flow field, jet exit velocity profiles, and in-hole vortices. / text

本論文研究主要針對理論上討論以久的單一稅率 (flat tax) 所得稅制度進行深入研究，理論上討論許久的單一稅率制度己經在世界各國廣為實行，而單一稅率所得稅制度，不僅可降低稽徵成本，更可讓納稅義務人誠實申報所得。簡單來說，單一稅率就是對每個人及課稅所得項目，課徵用同樣的單一稅率；也就是無論貧富，所得在一定免稅額以上，皆課以同一比率的稅額。由於除了免稅額外，不再提供任何扣除額及租稅優惠減免項目，因此單一稅率制度之稅基更為寬廣，符合水平公平；簡化稅制也將大幅降低徵納雙方的成本（包括稽徵成本、資訊成本與遵從成本等），而且因為稅制設計出適當的免稅額，即使實行單一稅率，所得愈高者其稅額占所得比例仍然呈現平均有效稅率遞增的現象，因此稅制仍然具有累進效果，打破大多數人誤以為「單一稅率不符垂直公平的迷思」。 美國兩位學者 Hall and Rabushka (1981) 提出單一稅率的所得稅制改革思想，即使未獲美國政府實行，幾十年後卻廣為許多歐洲國家所實施。1994年波羅的海地區的愛沙尼亞 (Estonia)、拉脫維亞 (Latvia)、立陶宛 (Lithuania) 陸續實施單一稅率所得稅制，尤其以俄羅實行稅制改革績效最為顯著，本文將更進一步研究分析單一稅率制度的理論基礎及對俄羅斯國實行單一稅率制度的具體設計內容及成果更詳細的探討。

In this thesis we examine the theoretical origin and statistical features of the Cosmic Microwave Background radiation. We particularly focus on the CMB power spectra and cosmological parameter estimation from QUaD CMB experiment data in order to derive implications for the concordance cosmological model. In chapter 4 we present a detailed parameter estimation analysis of the combined polarization and temperature power spectra from the second and third season observations of the QUaD experiment. QUaD has for the first time detected multiple acoustic peaks in the polarization spectrum, allowing meaningful parameter analyses from the polarization data alone. In a standard 6-parameter ACDM parameter estimation analysis we find the QUaD TT power spectrum to be in very good agreement with previous results. However, the QUaD polarization data shows some tension with ACDM model. The origin of this 1−2σ tension remains unclear, and may point to new physics, residual systematics or simple random chance. Combining polarization and temperature data we find an acceptable fit, and show that our results are dominated by the polarization signal. We combine QUaD with the five-year data from the WMAP satellite and the SDSS Luminous Red Galaxies 4th data release power spectrum, and extend our analysis to constrain the tensor-to-scalar ratio and the primordial isocurvature perturbations. Our analysis sets a benchmark for future polarization experiments. In chapter 5 we outline and test a new semi-analytical approach for the estimation of the pseudo- temperature and polarization CMB power spectra for experiments with incomplete sky coverage. We propose a method for constructing the mode-mode coupling matrices which connect the temperature and polarization pseudo-Cℓ’s to the unbiased all-sky bandpowers in the flat sky approximation. We apply this method to the apodization masks of the QUaD CMB experiment and we show that the true underlying bandpowers can be reconstructed from the simulated QUaD-like pseudo-Cℓ’s to high precision. We further investigate the possibility of extending the proposed analytical flat sky approach to the exact calculation of the PCL covariance matrices over a large range of multipoles and we find that the numerical calculation is extremely computationally expensive. The flat sky pseudo-Cℓ and covariances methods presented in this chapter are still work in progress and require more testing.

A number of QA procedures have been developed for Breast Brachytherapy treatments, yet none guarantee accurate dose delivery or allow conformation of the actual source position leading to errors sometimes going unnoticed. The objective of this study is to track the exact path the HDR source would follow in real time. The exit radiation of the HDR source was used to image a well defined matrix of markers. The images were acquired using FPD and were processed to obtain projection coordinates while an x-ray calibration image was processed to obtain marker coordinates. Each marker along with its projection represents a line in 3D. A mathematical solution for the ‘near-intersection’ of two 3D lines was implemented and used to determine the ‘true’ 3D source position. A matrix with N markers will produce N*(N-1)/2 points of intersection and their mean will result in a more accurate source position. This study has proved that the accuracy of source position detection using a FPD is sub-millimeter.

Flat ownership The theme of this thesis is flat ownership. The author has chosen this theme because it is very current and from the legal point of view also very interesting issue, which affects the major part of the population of the Czech Republic. The main objective of this work is to analyze the Institute's flat ownership in terms of the Flat Ownership Act. Furthermore, to highlight some problematic points in the regulation of housing ownership, to comment and suggest possible solutions with regard to case law and opinions of authors specializing in issues of housing ownership. This work consists of eight chapters. The first chapter deals with basic theoretical concepts of flat property, important for understanding the specific nature of the Institute's flat property. Such basics also may serve as a guide for policymakers in the design of legislation on housing. Then continues the second chapter, which talks about the concept of law based on flat ownership, its applicability and relationship to the Civil Code and other regulations. The third chapter focuses on the definition of specific terms related to the issue of flat property, such as: building, section, house, unit, flat, flat under construction, floor area of a flat, common space in building and land. The following fourth chapter is...

This thesis deals with transfers of flats from housing cooperative to their members. The thesis tries to describe the process of tranfers of cooperative owneship especially regarding is specific aspects which feature and follow these transfers. The thesis is devided into seven chapters. First chapter summarizes basic periods of historical development of flat cooperative. This historical excursion, particularly period after 1945, is important also due to using of some of the terms in following chapters and it is also important for its infuence on following property relationships. Sources of law reflecting issue of transfers of flats from housing cooperative is listed in second chapter. It is not a complete list. It mentiones only the most important ones that regard to flat ownership, rights and obligations necessary fort he transfers, relationship between previous and present legulation. Chapter three contents characteristic of individual subjects of this civil relationship. Most of this chapter dedicated to a member - tenant of housing kooperative. Also this chapter compares previous and present regislation. Specification of housing cooperatives is given in the forth chapter. As well as two previous chapters also this one gives comparison between previous and present legislation. It says the...

The legal reasons of termination of residental lease - current and future legislation The thesis is composed of five separate chapters and a comparison table as an annex. The paper analyzes the different reasons for the termination of a lease of flat according to currently active legislation and the legislation that comes into force on January 1, 2014. The author chose this topic because the issue of housing and residential lease affects all of us and it is thus important to recognize the exact content of individual reasons for termination. Given that a radical change awaits us in this field, the author decided to compare and evaluate the future legislation. The first chapter outlines a historical development of the reasons for termination in our modern democratic history. Primarily, it focuses on the changes that have been brought upon the termination reasons by the Act No. 107/2006 Coll. and 132/2011 Coll. To maintain a better consistency of the paper, the second chapter examines the basic terminology and assess where and how they are regulated today and how they will be in a few months time. In particular, the author provides the definitions of a flat, lease contract, parties to the lease contract, and describes various options of termination of the lease of flat. Similarly, the author deals...

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Purpose: The purpose of the study was to compare two visually opposite design techniques: skeuomorphic design, recognizable for its realistic presentation, and flat design, an abstract design option that has gained popularity in the last years. The two designs were compared using two generations of Internet users to find out what the preferences were for each generation. A knowledge gap was found in which design that would be the most beneficial to use for each generation. Methodology: To fulfill the purpose of the study, two methods were used; a literature study and an empirical study. The empirical study included experiments, interviews and questionnaires. The participants were contacted personally or via social media. All participants were in the age of 20-30 or 65+. Findings: Based on the collected literature and empirical evidence, it was concluded that the older generation of users might tend to prefer the skeuomorphic, realistic design online. Bright colors and a pedagogical style creates a good visual for elderly eyes and inexpert of using internet. The younger generation might tend to prefer the flat and abstract way of design online. A modern appeal with less clutter compared to the skeuomorphic style is considered beneficial. This opens up for further investigation. Implications: The empirical study included 20 people, who all participated in the experiment, interviews and answered questionnaires. The study groups consisted of 10 persons at the age span 20-30 years and 10 persons at the age span of 65+ years. Limitations: The study was only focused on two specific age groups with a small population found through convenient sampling. This means that in the future, the research could be conducted in a broader matter including more age groups and a larger population with a more specific sampling. The study's extent was affected by the time period in which it was executed. A longer period of time could have contributed to a more extensive study, perhaps with additional age groups and more participants in each group.