In this thesis, we propose a simple trench oxide layer polysilicon thin-film Transistor (TO TFT) process and the self-heating effects can be significantly reduced because of its structural advantages. According to the ISE-TCAD simulation results, our proposed TO TFT structure has novel features as follows: 1. The buried oxide and the isolation oxide are carried out simultaneously in order to achieve a goal of simple process. 2. The trench design is used to improve both the sensing current windows (~ 84%) and the retention time (~ 57%). 3. The thermal stability is drastically improved by its naturally formed source/drain tie. The above mentioned features help our proposed device structure to demonstrate the desired characteristics that are better than that of a conventional TFT. Additionally, the thermal instability is drastically improved which is good for long-term device operation.

Thesis (M.S.)--Naval Postgraduate School, 2002. / Thesis advisor(s): Richard Doyle, Raymond E. Franck, Jr. Includes bibliographical references (p. 47-50). Also available online.

Zugl.: Hamburg, University der Bundeswehr, Diss., 1999. / Includes bibliographical references.

The area of study is the Avery Drive drainage area. The objective of these projects is to alleviate frequent flooding at the Avery Drive neighborhoods. RC&A designed two options for improving the Avery Drive drainage area. Option one increases the capacity of the existing sewer system, and option two constructs a new storm drain system along Simon Street while keeping the existing system in place. Although both options offer preliminary solutions for alleviating flooding, the designs are unviable due to the lack of data that was available for the study. The following research will prove that RC&A fulfilled its contractual obligation of practicing due diligence by recommending further investigation to obtain valuable data for a complete and successful final design, rather than providing a solid recommendation based on existing data. / text

South Africa is in the throes of a skills crisis. This situation is seriously hampering the country's economic progress and global participation. This study focuses on the analysis of skills migration in South Africa, and specifically aims to provide a conceptual framework for better cognition of the skills situation in South Africa. The study is presented in a series of four articles with a final chapter that incorporates these articles in a cognitive unit and, therefore, provide a cognitive map to better understand skills migration in South Africa. Article one of the study provides an in–depth discussion on the serious shortage of skilled workers and its impact on the progress of the country. This crisis is largely due to the failure of the national education and training system to supply the economy with much needed skills required to support economic growth and job creation. The findings of this study indicated that there are various factors that are contributing to the skills shortages in the country. Some of the factors include: poor education standards, emigration, crime and HIV. It must be noted that these factors cannot be addressed overnight. Hence, this study emphasised the role that skilled foreign workers can play in alleviating the skills shortages in the country. The contribution of foreign workers could be viewed as a short to medium solution to the skills crisis. Finally, this study has confirmed the findings of similar studies undertaken by the Centre for Development and Enterprise that opening the doors to high–skilled immigration can only serve as a means of supplementing the skills pool and hence contributing to the economic growth of the country. In relation to the above, that is, a means to address the skills shortages, article two supported the view that a more expansive and robust policy approach to skills immigration can be part of the larger solution of addressing the skills shortages of the country. This would allow for economic progress and make South Africa globally competitive. Hence, the primary purpose of this article was to determine the effectiveness of South Africa's immigration policy to support skills immigration. Attempts to recruit foreign skills to work in South African firms is proving to be a challenge as there are a number of issues in South Africa's immigration policy that makes it restrictive for organisations when recruiting skilled foreign workers. The following are some of the consequences of this restrictive policy: due to major infrastructural growth and development during the 2010 period, there is tremendous strain on the construction industry as a result of shortage of engineers, quantity surveyors, technicians and architects. Problems in retaining skilled mining staff combined with insufficient new graduates and an aging workforce is affecting the South African industry. A dearth of engineering skills at Eskom has also contributed to the power crisis. Thus it could be concluded that South Africa's skills immigration policy is problematic and not helpful in addressing the skills shortages of the country. In addition and in relation to factors that are contributing to skills shortages in the country, article three of the study focused specifically on factors that either push or pull people into a country. Push factors are generally regarded as negative factors as they push people out of the country. These factors include affirmative action, which contributes to emigration of skilled individuals, crime, HIV, economic instability, poor health care and dissatisfaction with the political situation of the country. Pull or positive factors on the other hand draw skilled South Africans to a country. These factors include: attractive salary packages, early retirement within the education sector, an opportunity to gain international work experience, an improved lifestyle and variety of career choices. Certain immigrants are pulled to South Africa as they see it as offering them economic opportunities that are not available in their home country. However, these immigrants range largely from unskilled to a limited number of highly skilled workers. This is inadequate to address the skill shortages. Hence, this situation also points towards recruitment of skilled foreign workers as a short to medium term solution. The final article of the study confirms that skills shortage is a global phenomenon. As a result there is fierce competition amongst countries to attract skilled labour so as to alleviate these shortages and improve their competitive footing in the global economy. One major way that these countries strive to achieve their goal, is through promoting targeted skills immigration programmes to attract skilled workers. In order to alleviate these skills shortages and be part of the global economy, South Africa has to take lessons from these countries. Therefore, the main purpose of this article in the study was to indicate the advantages of having a competitive skills immigration policy. It also highlighted practices that make certain countries skills immigration programmes successful. In doing so, these suitable practices could be offered to policy makers so that they can make informed decisions on improving the skills immigration policy of the country. Finally, there is a general consensus that South Africa's policy on skills immigration is in need of radical review due to the fact that it is highly restrictive, bureaucratic, user–unfriendly and costly to administer. Moreover, it serves as an impediment for business and industry to recruit skilled foreign labour into the country as a result of excessive, and often, unnecessary regulations and procedures. As a consequence, South Africa tends to attract a higher proportion of unskilled and semi–skilled foreign workers when, in actual fact, it should be attracting highly skilled immigrants. / Thesis (Ph.D. (Business Administration))--North-West University, Potchefstroom Campus, 2011.

South Africans leaving their country of birth is not a new phenomenon. South Africa currently has a large shortage of engineers and the fact that engineers are seeking better opportunities abroad is worsening the skills shortage in South Africa. Engineers form a vital part of any manufacturing, design, supply or production entity and leave a large setback if a skilled, experienced engineer decides to emigrate. Official statistics from self-declared emigrants showed that 601 engineers out of the total 16,165 self-declared emigrants left the country in 2003. This figure can be double the given number of 601 if the multiplication factor of 2.0 is taken into consideration for people that do not complete the emigration forms at the airports. The focus of this study was to investigate the emigration potential of the skilled engineer along with the factors that might lead to emigration, and were classified into three distinctive groups, namely, economic, political and social. These aspects are generally referred to as "push" factors that drive people out of the country such as racism, crime and violence; as well as "pull" factors that attract people such as better work opportunities, better salaries and better education. An electronic survey questionnaire was used to determine the emigration potential of the engineers within a large mining organisation. The respondents had to indicate their emigration potential as well as the major factors that would contribute to them leaving South Africa. The overall measured potential for emigration within the specific mining organisation was significantly low. Only twenty percent of respondents agreed that they are planning to emigrate within the next five years and only two percent within the next year. Forty-six percent of respondents agreed that they would rather like to work in another country for only a few years than to emigrate permanently. Various reasons could have lead to the contradicting low measured emigration potential within this specific organisation. Literature has proven that there is a significant relationship between intention to emigrate and organisational commitment. Results also showed that emigration potential tend to increase the better the engineer is qualified; with the emigration potential amongst electrical and mechanical engineers higher than all other disciplines. Crime and violence were the number one factor impacting the respondent in terms of potential emigration. / Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2010.

South Africa is in the throes of a skills crisis. This situation is seriously hampering the country's economic progress and global participation. This study focuses on the analysis of skills migration in South Africa, and specifically aims to provide a conceptual framework for better cognition of the skills situation in South Africa. The study is presented in a series of four articles with a final chapter that incorporates these articles in a cognitive unit and, therefore, provide a cognitive map to better understand skills migration in South Africa. Article one of the study provides an in–depth discussion on the serious shortage of skilled workers and its impact on the progress of the country. This crisis is largely due to the failure of the national education and training system to supply the economy with much needed skills required to support economic growth and job creation. The findings of this study indicated that there are various factors that are contributing to the skills shortages in the country. Some of the factors include: poor education standards, emigration, crime and HIV. It must be noted that these factors cannot be addressed overnight. Hence, this study emphasised the role that skilled foreign workers can play in alleviating the skills shortages in the country. The contribution of foreign workers could be viewed as a short to medium solution to the skills crisis. Finally, this study has confirmed the findings of similar studies undertaken by the Centre for Development and Enterprise that opening the doors to high–skilled immigration can only serve as a means of supplementing the skills pool and hence contributing to the economic growth of the country. In relation to the above, that is, a means to address the skills shortages, article two supported the view that a more expansive and robust policy approach to skills immigration can be part of the larger solution of addressing the skills shortages of the country. This would allow for economic progress and make South Africa globally competitive. Hence, the primary purpose of this article was to determine the effectiveness of South Africa's immigration policy to support skills immigration. Attempts to recruit foreign skills to work in South African firms is proving to be a challenge as there are a number of issues in South Africa's immigration policy that makes it restrictive for organisations when recruiting skilled foreign workers. The following are some of the consequences of this restrictive policy: due to major infrastructural growth and development during the 2010 period, there is tremendous strain on the construction industry as a result of shortage of engineers, quantity surveyors, technicians and architects. Problems in retaining skilled mining staff combined with insufficient new graduates and an aging workforce is affecting the South African industry. A dearth of engineering skills at Eskom has also contributed to the power crisis. Thus it could be concluded that South Africa's skills immigration policy is problematic and not helpful in addressing the skills shortages of the country. In addition and in relation to factors that are contributing to skills shortages in the country, article three of the study focused specifically on factors that either push or pull people into a country. Push factors are generally regarded as negative factors as they push people out of the country. These factors include affirmative action, which contributes to emigration of skilled individuals, crime, HIV, economic instability, poor health care and dissatisfaction with the political situation of the country. Pull or positive factors on the other hand draw skilled South Africans to a country. These factors include: attractive salary packages, early retirement within the education sector, an opportunity to gain international work experience, an improved lifestyle and variety of career choices. Certain immigrants are pulled to South Africa as they see it as offering them economic opportunities that are not available in their home country. However, these immigrants range largely from unskilled to a limited number of highly skilled workers. This is inadequate to address the skill shortages. Hence, this situation also points towards recruitment of skilled foreign workers as a short to medium term solution. The final article of the study confirms that skills shortage is a global phenomenon. As a result there is fierce competition amongst countries to attract skilled labour so as to alleviate these shortages and improve their competitive footing in the global economy. One major way that these countries strive to achieve their goal, is through promoting targeted skills immigration programmes to attract skilled workers. In order to alleviate these skills shortages and be part of the global economy, South Africa has to take lessons from these countries. Therefore, the main purpose of this article in the study was to indicate the advantages of having a competitive skills immigration policy. It also highlighted practices that make certain countries skills immigration programmes successful. In doing so, these suitable practices could be offered to policy makers so that they can make informed decisions on improving the skills immigration policy of the country. Finally, there is a general consensus that South Africa's policy on skills immigration is in need of radical review due to the fact that it is highly restrictive, bureaucratic, user–unfriendly and costly to administer. Moreover, it serves as an impediment for business and industry to recruit skilled foreign labour into the country as a result of excessive, and often, unnecessary regulations and procedures. As a consequence, South Africa tends to attract a higher proportion of unskilled and semi–skilled foreign workers when, in actual fact, it should be attracting highly skilled immigrants. / Thesis (Ph.D. (Business Administration))--North-West University, Potchefstroom Campus, 2011.

South Africans leaving their country of birth is not a new phenomenon. South Africa currently has a large shortage of engineers and the fact that engineers are seeking better opportunities abroad is worsening the skills shortage in South Africa. Engineers form a vital part of any manufacturing, design, supply or production entity and leave a large setback if a skilled, experienced engineer decides to emigrate. Official statistics from self-declared emigrants showed that 601 engineers out of the total 16,165 self-declared emigrants left the country in 2003. This figure can be double the given number of 601 if the multiplication factor of 2.0 is taken into consideration for people that do not complete the emigration forms at the airports. The focus of this study was to investigate the emigration potential of the skilled engineer along with the factors that might lead to emigration, and were classified into three distinctive groups, namely, economic, political and social. These aspects are generally referred to as "push" factors that drive people out of the country such as racism, crime and violence; as well as "pull" factors that attract people such as better work opportunities, better salaries and better education. An electronic survey questionnaire was used to determine the emigration potential of the engineers within a large mining organisation. The respondents had to indicate their emigration potential as well as the major factors that would contribute to them leaving South Africa. The overall measured potential for emigration within the specific mining organisation was significantly low. Only twenty percent of respondents agreed that they are planning to emigrate within the next five years and only two percent within the next year. Forty-six percent of respondents agreed that they would rather like to work in another country for only a few years than to emigrate permanently. Various reasons could have lead to the contradicting low measured emigration potential within this specific organisation. Literature has proven that there is a significant relationship between intention to emigrate and organisational commitment. Results also showed that emigration potential tend to increase the better the engineer is qualified; with the emigration potential amongst electrical and mechanical engineers higher than all other disciplines. Crime and violence were the number one factor impacting the respondent in terms of potential emigration. / Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2010.

Thesis (M.C.M.) -- Lincoln University, 2009. / Also available via the World Wide Web.

In Czechoslovakia 1 078 000 ha of agricultural land were drained. At present, the drain systems located in these areas are at the end of their lifetime because of unsatisfactory maintenance of these systems. This project deals with evaluation of changes in functionality of the drain systems used in arable land in Vysočina. In examined territory of the region Vysočina (except the district Pelhřimov) there were accidentally chosen testing spaces where the drain systems fill 25 -75% of surface area and where the analysis of vegetative factors and humidity was done. As a source for the vegetative factors and humidity, there were used satellite photographs Landsat. The aim was to discover whether the vitality of vegetation and humidity in the part of land with the drain systems and without the drain systems differ.