In this thesis, we investigated charge carrier properties of two series of organic semiconductors with time of flight measurement. Charge carrier mobility is calculated in different electron filed and fitted to Poole-Frenkel model. In the first part, we investigated carrier properties of pyrrole derivatives .The mea- surement result of pyrrole derivatives with different functional group indicate that trans- port properties may effected by this different functional group and the bonding position. There have two different type of transport properties that is single transport and bipolar transport. In addition, carrier mobility have more than two order difference with this different functional group. Finally, we investigated carrier properties of anthracene derivatives. The measure- ment result indicate that the intermolecular aggregation can be solved by synthesizing another functional group to form polymer. This method not only perform excellent thin film stability but also keep bipolar transport property after synthesizing.

Following Chang, Lai, and Chang(1999), this report discusses the policy assignment problem with efficient wage-employment bargaining under perfect capital mobility. Whether it can rescue the default of proposed by Ramirez (1988) that coordinate between fiscal and exchange rate policies to achieve given desirable targets. The conclusion of this report is as follows¡G Under fixed exchange rates with perfect capital mobility, however, an appropriate mixture between monetary and fiscal policies can dynamically adjust to attain simultaneously the internal goal of desired output and the external goal of official foreign reserves. It's conclusion as the same as proposed by Lai, Chang, and Chu (1990). But more importantly, it can rescue the default of proposed by Ramirez (1988) that coordinate between fiscal and exchange rate policies to achieve given the internal and external goals. Accordingly, we can understand that efficient wage-employment bargaining in the labor market plays a curial role in assessing the assignment or policy instrument to targets. Furthmore, this report extends the analysis results under fixed exchange rates shifting to the system of a managed floating regime. It can find that the policy assignment can still achieve given desirable target. Consequently, this report provides further evidence that the efficient wage-employment bargaining is very important for assignment problem.

In this paper, we propose the correlated concurrent search approach to simultaneously and efficiently locate the mobile stations in the communications networks. Previous work either focuses on locating a single mobile user or assumes that the locations of mobile users are statistically independent. We first propose a mobility model in which the movements of mobile stations are statistically correlated. Next, we propose a new approach to discover the correlations among the mobile stations without calculating their joint location probability distribution function. Our simulation results show that as long as the correlation coefficient is larger than to a specific value, the location correlation could be used to reduce the average paging delay and increase the maximum stable throughput.

Abstract This text, referred to the manpower survey data in 1991 & 2003 obtained from the Accounting & Statistics Department, is aimed at making a study of the trend on the switch of occupation before and after the rise of the Knowledge-based Economy Age. The employees, having experiences of switch, are chosen from the data of the Accounting & Statistic Department for ongoing intersecting analysis of before and after their switch. This research has found that the turnover of occupation/profession, within the time before development of the knowledge-based economy Age of 1991, has been prone to the mass-labor industries, such as traditional manufacture, construction and etc. Amid those labor mobility, industries which having failing net turnover rate of 2003, include the ones of ¡§Professional, Scientific and Technical services¡¨ and ¡§Cultural, Sporting and Recreational Services.¡¨ It shows that Taiwan is appropriate to a new market with reconstructed labor and reacts clearly in that the supply of employees were not quick enough to catch reshuffled employment market. Possessing the first and second place among those industries are that ¡§Technicians and related¡¨ and ¡§Machine Operators & Fabricator¡¨ that are failing on the net turnover rate, are well in parallel with two industries of ¡§Construction¡¨ & ¡§Real Estate and Rental and Leasing ¡§ that are keeping minus on the net turnover rate. Furthermore, it shows that the traditional mass-labor industries have entailed labor to flow outward massively. The labor released from swift labor restructure is the major reason what causing the massive number of unemployment in the labor market. In the past twelve years, the structure of occupation of Taiwan¡¦s employees is changed from mass-labor to mass-technique, and developed toward the service-industry steadily. The dominant phenomenon existing together in current labor market are that both unemployment and insufficiency of labor.

¡@¡@In recent years, the trends in network communication towards mobile network .Traditional network cannot meet the need of new communication challenge. The 802.11 outperforms other new wireless network technique ¡@¡@In this paper, we assume user have wireless NIC devices with Mobile IPv6 protocol module. We use this model to build an environment and use this environment to design our Mobile IPv6 multicast simulation. We do these for two reasons, (1)To analyze how to use multicast over Mobile IPv6 wireless network. (2)To design an experimentation for multicast over wireless LAN. After we get results of the experimentation, we could know why wireless network does not have better quality than wired LAN. ¡@¡@During our implementation, we have a high latency problem and try to solve it by our program. After our improvement, average latency reduces to 27.77% and miss rate reduces to 33.07%. ¡@¡@Our implementation not only provide some useful information when some one need to build Mobile IPv6 environment but also give a solution for solving handover latency problem.

Look back to the history of the European Union¡]EU¡^, started with the foundation of the European Coal and Steel Community¡]ECSC¡^ in 1951, then it turned into European Atomic Energy Community¡]EURATOM¡^and European Economic Community¡]EEC¡^to repeal customs duties. Maastricht Treaty was established in the year of 1992 and it brought a brand new, all concepts of integration. The international society and the academic world are interested in whether all these changes will bring the EU to a new single state or not. It¡¦s not an optimum way to via the highly legalized economic laws to define that if there¡¦s a tendency of building a new state of EU. In order to get more ideas of EU, this thesis chooses the youth policy, which has multidimensional concepts, to analyze the situation and to clarify the present and future state of EU integration. With the more specific analysis of the youth policy, this thesis has found that it has not only a goal of strategy, but also one of the most important chains of EU¡¦s integration. Therefore, this article uses the youth policy to be the main framework to check the existence of the EU¡¦s state-building. This thesis provides a new point of view to see if there¡¦s a possibility of the EU¡¦s state-building; begin with checking the EU¡¦s development to build the concept of EU¡¦s integration trend, analyze the EU¡¦s youth policy and compare it with the main trend of EU¡¦s development to explore if EU tends to become one state. The main framework of the study consists of ¡§Internal solidification¡¨ and ¡§external discrimination¡¨ to prevent the limitation of single integration theory and to exam the state of EU¡¦s integration. This proves that EU has found the motive to take the further step to the next stage of integration. It is likely to say that the relations between the member states of EU are getting stronger in cultural concept.

The rapid growth of wireless and cellular technologies in recent years has brought in various applications in our daily life. Thus, the integration between WLAN and cellular networks has attracted more and more attention to researchers. In this Thesis, we proposed a preemptive channel allocation mechanism for WLAN-embedded cellular networks. In such integrated networking environments, frequent handoffs may result in dramatic performance degradation. In our model, a mobile node first utilizes the cellular network for supporting high mobility. However, the capacity of a BS is easily saturated. To minimize session blocking, a mobile node outside the WLAN coverage can preempt the channel(s) occupied by a mobile node inside the WLAN coverage. The preempted mobile node can still get access to the Internet through the AP of WLAN. For the purpose of performance evaluation, we build a three-dimension Markov Chain to analyze the proposed mechanism. We derive the residence time inside the WLAN coverage and outside the WLAN coverage, respectively. Finally, we evaluate the overall network performance in terms of the number of active sessions over WLAN, the channel utilization of a BS, the probability of session blocking, the preemption probability, and the preempted probability. From the evaluation, we observe the relative performance improvements of our proposed channel preemption mechanisms.

In the ever-changing environment, the mobile business market is burgeoning nowadays.In order to extend their management to end users, most enterprises decide to adopt mobility.During adoption, the greatest challenge happens to employees who are forced to make use of mobile equipment. What will affect employees when they are to accept new technological equipment? What is the implication of management? How should enterprises assist their employees when introducing new technology? Against the backdrop, more emphasis should be put on the study of user acceptance in order to enhance the benefits of new systems. At present, studies and theories concerning information technology acceptance are mostly applied to personal computers and systems, but seldom to mobility. In the filed of technology acceptance, numerous theoretical models have been established; however, each model is different from one another in constructs, variables and factors. As a result, based on the Unified Theory of Acceptance and Use of Technology (UTAUT), this Study discusses those factors that influence mobile staffers of the case study about PDA mobile system and equipment adoption. By means of literature collection and sorting, this Study adopts questionnaires to inspect a total of 185 mobile staffers of the case study. Because this Studyhas included all mobile staffers of the case study, the findings will make great contributions toboth the case study and relevant industries. According to the findings, Performance Expectancy, Social Influence, and Facilitating Conditions prove to be major influential factors of Behavioral Intention, while Effort Expectancy is not directly related to Behavioral Intention. In the analysis of moderators, this Study finds out that experience, educational background and age of users have apparent moderating effects on various paths of the model. As for the implication of management, in order to strengthen mobile staffers¡¦ intention to use new systems and to increase system benefits, enterprises should first promote the usage of new systems, communicate with and encourage their employees when introducing new systems. Second, enterprises should better the quality and quantity of vocational trainings.Third, new systems should be equipped with functions which help mobile staffers improve their performance. Fourth, new systems should be easy to use and learn according to different designs for usage. In addition, mobile staffers should realize those benefits which new systems offer, and have more opportunities to practice using new systems. Therefore, mobile staffers can have higher perception of Performance Expectancy, Effort Expectancy, Social Influence, and Facilitating Conditions concerning new systems. As for the analysis of moderators, this Study finds out that the variable of Social Influence has a strong indirect relationship to mobile staffers who are older, graduated from senior high school, or have worked for over 12 years. Hence, the management level should educate and encourage the above-mentioned staffers, in order to enhance their intention to use new systems.

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This thesis is a study of social mobility in Thomas Hardy's novels based on The Return of the Native, Tess of the d'Urbervilles, and Jude the Obscure. Using the influence of family background, education and social injustice, it discusses the identity crisis that arises from an individual's rapid social mobility. The study also shows how the obstacles and the inner conflicts that the novelist himself encounters in his own process of moving upward socially, are transformed into parts or fragments of his novels, imbuing them with highly autobiographical elements. The introduction discusses the roles that the Industrial Revolution and other occurrences in history played in creating social mobility at the time and the roles that family background, education, personal temperament, and social injustice played in inhibiting it. Particular attention is paid to how the individuals, particularly those from the lower classes, are stopped from moving upward completely and what conflicts in self-identity are created in their struggles. Chapter one discusses The Return of the Native, focusing on the dilemma arising from the discrepancy between the expectations of oneself and others in social mobility. Chapter two discusses Tess of the d'Urbervilles, focusing on the idea that family background and education can lead to social displacement and alienation in a mobile society. Chapter three discusses Jude the Obscure, focusing on how disillusion with one's own life and goals caused by one's own family background and negative temperament as well as social injustice can sabotage one'