This paper presents the results of servo designs for optical disk drives which consist of a dual-input/single-output (DISO) actuator; both a sledge actuator and a voice coil motor contribute to a radial movement of the spot on the disk. DISO systems are subset of multi-input/multi-output (MIMO) systems and thus the servo engineer can apply the design methods developed for MIMO controller design to the DISO compensator problems. These techniques include H2 , H¡Û and £g-synthesis. However, in order to obtain insights into the controller elements, in this study we prefer the H¡Û loop-shaping approach. Here, the focus is on stability and disturbance rejection. The method is presented for a master-slave control scheme in tracking servo, a parallel scheme in seeking servo, and a unit-feedback scheme in focusing servo. The maximum stability margin can be obtained in H¡Û loop-shaping algorithm. Furthermore, a robust controller guarantees to stabilize it would be carried out. Finally, computer simulation results are provided to show that the shaking disturbance due to the run-out of disk can be significantly attenuated and a good tracking performance can be achieved by the developed controller.

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In the economic development of Taiwan, the privatization of state-run enterprise has a very important mission in government policy. In the process of Taiwan¡¦s privatization of state-run enterprise, China Steel Corporation (CSC) has plays an essential role among the privatized institutions, and shapes the way and view of the privatization. Past researches were restricted to the enterprise evaluation happened before and after privatization, and stressed the use of the abstract modeling and mathematics, however, the relation between theory and practice has been touched very little in terms of the institutional change of privatization. This study is to explore the privatization of CSC from the perspective of new institutional economics. The methodology used is qualitative approach, which differes from the qualitative approach. The primary approach is document analysis, and supplemented by Gadamer¡uQ&A logic¡v. Under the self-adjustment to the change of internal institution and the adaptation to the change of external environment, the present analysis of CSC privatization, from the perspective of the change of property right and institution, will result in comparative prices change and new transaction profit, and new institution will create some arrangements, inspiration effect, etc. The result of this research can be summarized as two points, which we hope may offer some contributions. 1. From the perspective of property right, the behavior of rent-seeking resulting from the involvement of interest groups during the CSC privatization process may easily cause the phenomenon of increasing transaction cost. Therefore, in the future plan for institutional change, we must consider the institutional environment and strategy to reduce the possibility of that phenomenon. 2. From the perspective of institutional change, the present study analyzed from the imposed institutional change of state-run CSC to the induced institutional change of privatization, and it can give a clear understanding in that the cultural change of enterprise has a critical influence to the institutional change.

The protection of aircraft against shoulder fired heat seeking missiles is of growing concern in the aviation community. This thesis presents a simple method for shielding the infrared signature of a jet engine from heat seeking missiles. The research efforts investigated two approaches to shield the thermal signature of the Noel Penny Type 401 turbojet at the Texas A&M University Propulsion Lab Test Cell. First, liquid nitrogen was injected through a manifold at a flow rate equivalent to the flow rate of exhaust gases, producing a small temperature reduction in the exhaust but no infrared shielding. Second, water was injected at a flow rate of 13% of the flow of exhaust gases, producing a greater temperature reduction and some shielding. Water was then injected through a manifold at a flow rate of 118% of the flow rate of exhaust gases, producing a substantial reduction in temperature and complete shielding of the infrared signature. Additionally, numerical simulations were performed using FLUENT to support these experiments. Results are presented in the form of thermocouple data and thermal images from the experiments, and in the form of temperature contours and streamtraces from the simulations.

Research shows that a considerable number of children and adolescents suffer needlessly from psychological problems and only about 50% of those receive the necessary services. Considering the impact of untreated child psychological problems on problems in adulthood, it is important to examine the influence of attitudes on seeking mental health service for children. Currently, no known measure exists to measure attitudes toward mental health services for children. Building on previous research, the goal of the present study was to develop a measure of individuals' attitudes toward mental health services for children. Using confirmatory factor analysis, the factor structure was assessed using a sample of university students (N = 250). In addition, several hypotheses were tested examining the influence of previous experience with mental health services on attitudes towards psychological services and mental health stigma. Finally, differences in child characteristics on intended help-seeking were examined. The measure developed consists of 26-items scored from 0 (strongly disagree) to 5 (strongly agree). Overall, results indicated that the 3-factor structure of the measure developed was valid and reliable. Also, consistent with previous research on mental health services results supported the hypotheses of the current study. Future research will examine whether the 3-factor structure is replicated using a sample of parents.

This study aims to explore the socialization issues of new-coming professional engineers. Based on theory socialization, social learning theory and social information processing approach, this study attempts to introduce work group socialization (group level) and self socialization (individual level), i.e., information seeking behavior, to the research model simultaneously. It is to improve the inconsistency between theories and empirical studies, and further to provide integral perspective on newcomer¡¦s socialization issues. Therefore, this study applies cross-level research design to explore and analyze relationships among socialization tactics at group and individual level, role breath self-efficacy and role performance. Collecting data from 91 groups, which include 91 immediate supervisors and 384 new-coming professional engineers, the research draws conclusion in two dimensions: (1) information seeking behavior, role breath self-efficacy, and role performance relationships at individual level; (2) socialization tactics, role breath self-efficacy and role performance relationships at cross-level. At the individual level, the results show that (1) when individuals apply overt, third party, and observation as the information seeking behaviors, there is a positive effect on role performance; when apply indirect and test as the information seeking behaviors, there is a negative effect on role performance. (2) When individuals apply ¡§overt¡¨, ¡§third party¡¨, and ¡§observation¡¨ as the information seeking behaviors, there is a positive effect on role breath self-efficacy; when apply ¡§indirect¡¨ and ¡§test¡¨ as the information seeking behaviors, there is a negative effect on role breath self-efficacy. (3) When individuals have high level of role breath self-efficacy, they are more willing to undertake tasks beyond work requirement, and thus have significant increase in role performance. (4) Role breath self-efficacy has full mediating effect on the relationship between overt, indirect, third party, test and role performance, and it has partial mediating effect on the relationship between observation and role performance. At the cross-level, it is found that (1) when the groups adopt ¡§investiture¡¨ and ¡§sequential¡¨ socialization tactics, the individual¡¦s role performance is positively increased; when the groups adopt ¡§collective¡¨, ¡§formal¡¨, ¡§serial¡¨ and ¡§fixed¡¨ socialization tactics, there is no significant influence on individual¡¦s role performance. (2) The level of groups¡¦ ¡§collective tactic¡¨ has negative moderating effect on the relationship between individual¡¦s ¡§third party¡¨ information seeking behavior and role breadth self-efficacy; ¡§sequential tactic¡¨ has positive moderating effects on the relationship between third-party information seeking behavior and role breadth self-efficacy; ¡§formal tactic¡¨ has negative moderating effect on the relationship between ¡§testing¡¨ information seeking behavior and role breadth self-efficacy; sequential tactic and fixed tactic have negative moderating effect on the relationship between observation information seeking behavior and role breadth self-efficacy; and serial tactic have positive moderating effect on the relationship between observation information seeking behavior and role breadth self-efficacy. (3) Each socialization tactic does not have direct contextual effect on role breath self-efficacy, while role breath self-efficacy also does not have mediating effect on the relationship between socialization tactics and role performance.

<p>ABSTRACT</p><p>The aim of this study was to examine the relationship between job satisfaction, birth order and sensation seeking. The sample consisted of 179 jobholders in four different organizations in southern Sweden, with an average age of 44 years (SD = 12,12). A questionnaire consisting of three parts was used to map out and measure the participants’ family background, birth order, job satisfaction and sensation seeking. The study showed no significant relationship between birth order and job satisfaction (p = 0,127). Furthermore, the study showed a significant relationship between sensation seeking and job satisfaction (p = 0,025). Finally the analyses showed that laterborns had a significantly higher score on the sensation seeking scale, used in the questionnaire, than firstborns (p = 0,015). The study concludes that sensation seeking is a significant factor when it comes to prediction of job satisfaction.</p> / <p>SAMMANFATTNING</p><p>Syftet med denna studie var att undersöka huruvida det fanns ett samband mellan arbetstillfredsställelse och syskonplacering, med hänsyn taget till spänningssökande. Stickprovet bestod av 179 arbetstagare inom fyra organisationer i södra Sverige med en medelålder på 44 år (SD = 12,12). Instrumentet som användes för insamling av data bestod av en enkät med tre delar. Dessa delar kartlade och mätte deltagarnas familjebakgrund, syskonplacering, arbetstillfredsställelse och spänningssökande. Studien visade att det inte fanns något samband mellan syskonplacering och arbetstillfredsställelse (p = 0,127). Vidare visade studien att individer med ett högt mått av spänningssökande upplevde högre arbetstillfredsställelse än individer med ett lågt mått av spänningssökande (p = 0,025). Slutligen framkom det att yngrebarn hade ett högre mått av spänningssökande än individer med en annan placering i syskonskaran (p = 0,015). Spänningssökande är alltså av vikt när det kommer till tillfredsställelse på arbetet.</p>

Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 132-141). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 132-141). Also available on the Internet.

The aim with this study is to examine and analyze how the employees at two residential care homes for unaccompanied refugee children work with the children during their pending decision for asylum in Sweden. The purpose is to gain insight into the employees’ daily work with the target audience and how they handle decisions with the children. The method to collect data is to carry 6 interviews with the employees at the residential care home. The interviews were semi-structured with purpose of letting the interviewee lead the content of the interview. The results of the interviews show that the employees have very varied types of duties within their profession. The employees must also maintain many different roles, for example family, teacher and friend. The employees do often have to face very difficult situations with the children during their wait for a residence permit decision. The result was analyzed with theories as Integration Theory and Coping theory. The conclusions of this study are that the employees at the residential care homes for refugee children have very multifaceted work tasks with a very important target group. The increased amount of unaccompanied refugee children and adolescents escaping to Sweden has led to a situation that the Swedish society haven’t had time to adjust to. Clarifying how the employees work and treat the unaccompanied children can contribute to spreading this knowledge to other community stakeholders.