In this thesis, two separate research topics are undertaken both in the general area of compact RF/microwave circuit design. The first topic involves characterizing the parasitic effects and error due to unused post-production tuning bars. Such tuning bars are used in microwave circuit designs to allow the impedance or length of a microstrip line to be adjusted after fabrication. In general, the tuning bars are simply patterns of small, isolated sections of conductor adjacent to the thru line. Changing the impedance or length of the thru line involves bonding the appropriate tuning bars to the line. Unneeded tuning bars are simply not removed and left isolated. Ideally, there should be no coupling between these unused tuning bars and the thru line. Therefore, the unused tuning bars should have a negligible effect on the circuit??s overall performance. To nullify the parasitic effects of the tuning bars, conventional wisdom suggests placing the bars 1.0 to 1.5 substrate heights away from the main line. While successful in the past, this practice may not result in the most efficient and cost-effective placement of tuning bars in today??s compact microwave circuits. This thesis facilitates the design of compact tuning bar configurations with minimum parasitic effects by analyzing the error attributable to various common tuning bar configurations with a range of parameters and offset distances. The error is primarily determined through electromagnetic simulations, and the accuracy of these simulations is verified by experimental results. The second topic in this thesis involves the design of compact microwave resonators using the transmission line approach to create negative refractive index metamaterials. A survey of the major developments and fundamental concepts related to negative refractive index technology (with focus on the transmission line approach) is given. Following is the design and measurement of the compact resonators. The resonators are also compared to their conventional counterparts to demonstrate both compactness and harmonic suppression.

The trend in personal finance and retirement planning has changed, more and more investors have focused on the popular issue of wealth allocation across asset classes and specific investments. As a result, mutual fund investment companies have become an increasingly effective conduit for current income generation, capital appreciation, and the benefits derived through diversification. As time goes by, the amount of offshore funds introduced in Taiwan is increasing. We investors always want to ask which one could perform well and bring the investors a good return based on the past performance information. Thus the purpose of this paper is to give an overview and performance persistence of the largely unexploited Taiwan offshore and international American, European, Japanese, and Global equity mutual funds compared to Taiwan equity mutual funds and the Information Technology equity mutual funds. To do this, we evaluate fund performance applied for the Composite Index to cooperate the highly cooperate the colinearity problem of the performance indices which is introduced from Lee (2007) and Chou (2007). We focus on 6 biggest off-shore mutual fund market in Taiwan which are American, European, Global, Taiwan, Japan and Information Technology. All the performance information and fund characteristic are from Lipper. We restrict our sample to pure equity funds with at least 36 months of data. Performance details and specific fund characteristics are collected by the end of 2006. We develop the Composite Index component weights by factor analysis from January 2003 through December 2004 and rank the funds by the Composite Index score to exam the performance persistence through January 2005 through 2006. All returns are almost in local currency. We have the conclusion which all the difference in performance of the top 10% and the bottom 10% in each market is significant from zero except for the Information Technology industry. We find the effect of the Composite Index would depend on the maturity, variety, and the characteristic of the market. The more mature the market is, the less significant the performance between top deciles and bottom deciles, American mutual fund is the best supportive evidence. All the return-based indices are not adding value to select funds. Though the performance of the Composite Index is better than the other index, the raw annual return is not so high to be applied. As to the variety, the different categories and the range of the distribution of monthly return in the market have the effect to the significance of the difference in performance between the top 10% and the bottom 10%, markets of European, Global, Japan, and Taiwan are the best explanations. Finally, the higher the risk is the better the fund perform is the one special rule selecting fund in the market of Information Technology.

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In this thesis, it mainly studies the performance characteristics of the bending losses in semiconductor waveguides and the quantum dots semiconductor optical amplifier. We used InP-subtract and InGaAlAs /InAlAs multiple quantum wells epitaxial wafer grown by MBE as our material(£fg=1.41£gm). We had successfully fabricated a series of bending strip-loaded waveguides. On the quantum dots semiconductor optical amplifier, symmetric InGaAlAs/GaAs quantum well structure is used to fabricate the optical waveguide. We have established an automatic optical measurement system to measure the device characteristics more accurately. Design respect of bending waveguide, we design a series of radius, is 60£gm, 80£gm, 110£gm, 170£gm,and 260£gm respectively, and utilize Fabry-Perot resonant, measurement and estimate the loss of bending waveguide in quantity. We find the bending waveguide loss as radius for 260£gm and contain deeply etching process was quite equal to straight waveguide loss. On the quantum dots semiconductor optical amplifier, we design a single mode waveguide and a broad area waveguide to compare the difference of their electron-hole combination situation. A single mode waveguide with longer cavity length had better combination situation than shorter (C311 of cavity length 4000£gm ,0.00066£gW *A/cm2). And the broad area waveguide had more better combination situation to single mode waveguide (C311 of cavity width 150£gm, length 4000£gm , 0.0966£gW *A/cm2). For the gain to the pump signal, C311 singe mode waveguide (emission peak:1211nm,pump signal:1260nm) could get a gain about 3.56dB¡Fand C374 singe mode waveguide (emission peak:1255nm,pump signal:1260nm) could get a gain about 6.1dB.

Local land administration office is to execute registering of lands and buildings. Its objective is to implement local land policy. In the mean time, its functions are about citizen¡¦s property rights. Because the social, economy and political environment have been changed rapidly, demands for land administration and service quality have been growing as well. Therefore, the first priority work for government is to improve whole administrative efficiency and effectiveness, by using modern technology. It thus needed to electronic-wise land office, to set up a computerization system of land information management so as to provide complete land information, to execute modern administration, to promote competition, and to provide convenient and efficient services. Therefore, the purpose of this study is to research these first-line local offices so as (i) to promote its efficiency after being computerized (ii) to compare the implementing result before and after the computerization in Kaohsiung county and city, and (iii) to study the influences of the computerized process, finally (iv) to suggest local offices decision makers the future direction of improvement. This study uses DEA and SFA to compute their efficiency after computerization of the local land offices in Kaohsiung county and city. To do this, we collect annually statistics and use DEA-Solver software and Frontier 4.1 computer program to evaluate their productivities, and to make an efficiency analysis. The results revealed that the annual average technology efficiency descended before computerization and ascended after computerization for all land offices. CCR model revealed that annual averages of technology efficiency are stable before computerization and it ascended after computerization for all land offices. SFA analysis revealed that annual averageefficiency score slightly ascends before computerization and ascends after computerization except for year 2001. For technology changes, their productivities slightly descends for all land offices in Kaohsiung county but ascends for all land offices in Kaohsiung city. For efficiency slack analysis, all five land offices must reduce their inputs in Kaohsiung county. For output slack, only Chi-Shang land office must expand its output 13.01% so as to reach a relatively inefficient DMU. Between the Kaohsiung county and city, information difference between city and country has influences on efficiency. Land offices in Kaohsiung city have general higher average technology efficiency than those in Kaohsiung county. This study uses DEA and SFA to analyze land offices in Kaohsiung county and city, and it was found that whole efficiency scores increased after computerization. And it is suggested several important problems and the possible directions of productivity improvement in the future for all land offices.

This paper tests the relationship between corporate governance and corporate value and the relationship between corporate governance and firm performance. A ¡§Governance Index¡¨ is built based on three aspects of the company governance structure: 1. the performance of the broad of directors, 2. ownership structure 3. involvement of capital markets. This index is used as a proxy measure of the effectiveness of the governance mechanism. We propose the firms under good governance should outperform those under poor governance. This paper finds a striking relationship between Governance Index and firm performance. The results imply that the Governance Index built in this paper is successful in evaluating the effectiveness of the governance mechanism of firms in Taiwan.

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New improved model was developed to calculate the absorption and refractive-index spectra in the band-edge region for all the important compound semiconductors. An accurate absorption model including Coulomb interaction and Urbach-broadened band edge has been demonstrated for direct bandgap semiconductors. We have developed a accurate model in which a piecewise linear approximation is used for the shape of the absorption spectrum. We also propose a steep-edged compound Lorentzian line-shape function (SCL-LSF) for modeling the Urbach tail, and the line broadening of exciton absorptions. The results of applying this fitting procedure to the absorption spectra of GaAs, InP and InAs are presented, and a consistent set of band parameters are extracted. The analytical absorption model is suitable for a complete closed-form Kramers-Kronig transform of the absorption spectrum to obtain the refractive index spectrum. A band-to-band Coulomb interaction model for the refractive index spectra is presented of AlxGa1-xAs for 0 < x < 0.412, and In0.53Ga0.47As ternary semiconductors at photon energies near and above the band gap. An accurate absorption model is used to calculate the contribution on the refractive index near band-edge region through a complete closed-form Kramers-Kronig transform. By including a single oscillator Sellmeier model for the high-energy absorption spectrum, closed-form expressions are obtained for the band-edge region refractive index. Both spectra are fully described in terms of a finite set of parameters that can be interpolated for all the important compound semiconductors. The refractive index spectra are extended beyond the band-gap energy and are in excellent agreement with the available experimental data. Our new model makes accurate modeling possible for devices such as electroabsorption and electrorefraction modulators.

<p>In this thesis, I examine the performance of a sample of ten Swedish-based internationally diversified mutual funds managed by one of the largest commercial banks in the Nordic region.</p><p>The investigation cover a time span between 2000 and 2005 divided into two sets, 2000-2002 and 2003-2005. To measure the performance of the funds, I will utilize the Jensen’s index.</p><p>The results shows that there is no empirical evidence which indicates that managers seize superior stock selection skills when investing locally compared with investing on different markets for the selected funds. It does on the other hand shows that two out of the seven funds increases the beta towards the market when the market goes up. Finally, this thesis shows that inclusion of emerging markets creates further possibilities for diversification in a portfolio due to more developed markets tends to have high level of integration and move together.</p>

Diss. (sammanfattning) Jönköping : Hälsohögskolan, 2009. / Härtill 4 uppsatser.