The primary goal of this work is a implementation of temporal XML database in Java. There are described databases for XML documents and temporal databases with emphasis on their query languages and problem data storing is also analyzes for temporal databases. Source codes of the resulting application are public as open-source.

This thesis focuses on a implemenation of a a temporal data support within traditional relational environment of PostgreSQL system. I pick up on Radek Jelínek's thesis and an extension developed by him. I've analyzed the extension from functional, practical and performance perspectives. Based on my results, I've designed and implemented changes to the original extension. The work also contains implementation details as well as performance comparison results between the new and the original extensions.

Dans ce manuscrit, nous avons l’intention d’une part d’étudier les effets isotopiques dans les spectres infrarougesde la phosphine et de l’éthylène et d’autre part de contribuer au développement d’un modèle théoriquepour les molécules non-rigides. La finalité de ce travail est la construction de listes spectroscopiques complètesen lien avec les applications planétologiques et astrophysiques à partir de calculs variationnels. La premièrepartie de ce travail de thèse concerne l’étude des 2 espèces deutérées de la molécule de phoshine et des 10 espècesisotopiques de l’éthylène enrichies par 13C et/ou D, le tout à partir de surfaces ab initio. Pour cela, nous avonsutilisé une procédure systématique permettant de propager l’information de l’isotope principal vers des espècesmoins abondantes à partir de considérations de symétrie et de transformations entre les coordonnées normales.Finalement, les spectres infrarouges ont été modélisés et confrontés aux données observées. La deuxième partiede ce travail porte sur l’étude des molécules non-rigides présentant un ou plusieurs mouvements de largeamplitude. Dans ce contexte, nous sommes partis du formalisme proposé par Hougen, Bunker et Johns. Afinde pouvoir réutiliser une grande partie des outils déjà existants, nous avons choisi une formulation algébriquedu problème. Ce modèle a d’abord été validé sur des molécules rigides connues pour lesquelles nous avions descalculs de référence. Concernant les systèmes non-rigides, des résultats préliminaires ont été obtenus pour lesmolécules d’ammoniac et d’éthane. De manière plus générale, ce travail offre également des solutions concrètesà des problèmes allant au-delà de l’approche HBJ en proposant différentes méthodes de calcul de la matrice derotation permettant de tourner le repère afin de minimiser le couplage entre la rotation et les mouvements degrande amplitude. / This thesis is devoted to the study of the isotopic effects in infrared spectra of the phosphine and ethylenemolecules as well as to the development of a theoretical model for treating nonrigid polyatomic molecules. Thefinal goal of this work is to build complete theoretical line lists for planetological and astrophysical applicationsby using ab initio surfaces and variational calculations. In a first part, a systematic procedure allowing to propagateinformation from the main isotopolog to the less abundant «daughter» species has been developed fromsymmetry considerations and normal coordinate transformations. Finally, the infrared spectra predictions havebeen carried out and compared to the experimental available data. The second part focuses on the treatment ofnonrigid molecules possessing one or more large amplitude motions. In this context, the Hougen-Bunker-Johnsformalism was used. The particularity of our algebraic model consists in the possibility of using most of thetools previously developed in the group. Our model has been first validated on semirigid systems for whichthere exist reference calculations. Some preliminary results concerning nonrigid molecules have been obtainedfor ammonia and ethane. In addition, we have proposed different methods for computing the rotation matrixallowing to take place in a frame minimizing couplings between rotation and large amplitude motions.

Culture tends to be misplaced as a secondary instructional goal in most foreign language classrooms. Although research has suggested that a strong link exists between language and culture, the problem resides in how best to teach culture in the classroom. While this problem impacts all learners, it may affect high school students more because they are entering a multilingual and multicultural world through higher education, study abroad, and employment. Based on Moran's conceptual framework of culture, this study addressed a gap in the literature by examining the effects of 2 innovative technologies, wikis and eBoards, and their potential to improve high school Spanish students' cultural proficiency. The research questions examined whether or not there is a difference in level of cultural proficiency between those students using wikis and those using eBoards. In addition, this study observed whether differences exist in satisfaction levels for students learning about Spanish culture via eBoards and wikis. The research method was a quasi-experimental quantitative design that involved approximately 150 Spanish 3 students at a suburban high school. Three instruments were used to gather the data: a demographic survey, a pre- and posttest instrument, and an attitudinal survey. Independent t tests and an analysis of covariance (ANCOVA) revealed that there was no statistically significant difference in gains in student cultural proficiency. However, the attitudinal survey results indicated that there were statistically significant differences in student levels of satisfaction between the 2 groups in favor of students using wikis. These results provide classroom-based evidence of the use of collaborative instructional technology to teach culture in the Spanish classroom and, more importantly, to further student understanding of the interconnected global society of the 21st century.

Although few firms can function without an information technology (IT) department, senior executives often consider IT as secondary. Historically, studies have found IT departments to have low influence and power status compared to other departments. Few, if any, studies have investigated what factors contribute to this subservient position. Three research questions that inspired this study regarding the IT department's influence and power included factors that shape the IT influence and power, the consequences for the firm's IT orientation and business performance, and how firm's IT orientation affects business performance. This quantitative study explored the notion that accountability, innovativeness, customer connectedness and partnering with other departments positively affect the IT department's influence and power. A synthesis of resource dependence and strategic contingency theories framed the theoretical basis for the structural equation model analyzed in this study. Responses from a Web panel of 349 anonymous, voluntary senior managers of firms operating in various industry types provided the data. Analysis results showed that accountability, innovativeness, and partnering with other departments positively affect the IT department's influence and power. Also, the firm's IT orientation, more so than IT department's influence and power, positively affects business performance. Results help IT executives to become more influential and enhance their ability to participate in their firm's strategic decisions. From social change perspective, influential IT managers can affect strategic decisions regarding social programs, implement new IT tools to do more with less, and new ways of distributing critical information and resources to enhance the speed of response when and where needed.

The worldwide software project failure rate, based on a survey of information technology software manager's view of user satisfaction, product quality, and staff productivity, is estimated to be between 24% and 36% and software project success has not kept pace with the advances in hardware. The problem addressed by this study was the limited information about software managers' experiences with data-driven decision making (DDD) in agile software organizations as a tool to improve software development productivity. The purpose of this phenomenological study was to explore how agile software managers view DDD as a tool to improve software development productivity and to understand how agile software development organizations may use DDD now and in the future to improve software development productivity. Research questions asked about software managers', project managers', and agile coaches' lived experiences with DDD via a set of interview questions. The conceptual framework for the research was based on the 3 critical dimensions of software organization productivity improvement: people, process, and tools, which were defined by the Software Engineering Institute's Capability Maturity Model Integrated published in 2010. Organizations focus on processes to align the people, procedures and methods, and tools and equipment to improve productivity. Positive social change could result from a better understanding of DDD in an agile software development environment; this increased understanding of DDD could enable organizations to create more products, offer more jobs, and better compete in a global economy.

Non acceptance of technology may result in serious damages to organizations. For example, non acceptance of simulation technology cost Merrill Lynch Bank over {dollar}50 billion in 2008, while statistics in 2 separate studies showed that non acceptance of technology was responsible for a 57% decrease in performance level for physicians practicing in public tertiary hospitals in Hong Kong, and a 39% decrease in productivity for hotel workers in Seoul, Korea. The problem addressed in this research was non acceptance of simulation technology by project managers. This research investigated the correlation among personal innovativeness, organizational innovativeness, perceived usefulness, perceived ease of use, and intention to use simulation techniques by members of the Project Management Institute (PMI). The theory of reasoned action (TRA) and the extended technology acceptance model (TAM) served as the theoretical foundations for the study. In this quantitative, correlational survey study, data were obtained from a random sample of the PMI membership. Simple regression analysis was used to address research questions. Results indicate significant correlations of moderate strength among usefulness, innovativeness, ease of use, and intention to use simulation technology. The study contributes to positive social change by identifying factors that help companies to improve their business processes, generate more profits, create jobs, and make positive contributions to the communities in which they are located.

Two dominant research views addressing disappointing success rates for information technology (IT) projects suggest project success may depend on the presence of a large number of critical success factors or advocate for agile project management as an alternative to traditional practice. However, after two decades of research, success rates remain low, and the role of critical success factors or project management approach remains unclear. The purpose of this study was to use views of experienced project managers to explore the contribution of success factors and management approach to project success. Applying organizational, coordination, and contingency theories, the research questions examined IT project manager perceptions about success factors, how those success factors interrelate, and the role of management approach in project success. A Q methodology mixed method design was used to analyze subjective insights of project managers about the important critical success factors for IT projects. Two critical success factors emerged as important: a sustained commitment from upper management to the project and clear, measurable project goals and objectives. Three composite factors also surfaced representing the importance of people-project interactions, user/client involvement, and traditional project management tasks. The analyses found no broad support for agile project management and could not confirm principles of organizational or coordination theories as critical for project success. However, a contingent relationship might exist between some critical success factors and merits further investigation. Helping the project management community understand IT project success factors could improve project execution and reduce failure rates leading to sizeable savings for project clients.

Mergers and acquisitions have historically experienced failure rates from 50% to more than 80%. Successful integration of information technology (IT) systems can be the difference between postmerger success or failure. The purpose of this phenomenological study was to explore the entropy phenomenon during postmerger IT integration. To that end, a purposive sample of 14 midlevel and first-line managers in a manufacturing environment was interviewed to understand how the negative effects of entropy affect the ultimate success of the IT integration process. Using the theoretical framework of the process school of thought, interview data were iteratively examined by using keywords, phrases, and concepts; coded into groups and themes; and analyzed to yield results. The data indicated that negative entropy factors were associated with the postmerger integration process. Participants' perception of loss emerged as a central theme for employees from both sides of the merger. A majority of the participants perceived entropy in terms of loss similar to the loss of a family member. The findings may contribute to social change by providing a framework for merger integration managers to mitigate the negative effects of entropy and facilitate a successful IT integration outcome. Successful mergers increase shareholder value and customer satisfaction, which strengthen the company's financial condition. A financially stable company will be in a better position to provide a positive contribution to the surrounding community, offer stable employment opportunities, and sponsor corporate social responsibility programs.

The rapid rise of technology, which has become embedded in all facets of 21st century society during the past decade, has fostered a corresponding rise in its misuse. Digital citizenship abuse, a relatively new phenomenon of this electronic age, is a rapidly growing global problem. Parents, schools, and society play roles in supporting appropriate online behavior. Schools must take the lead role to assess and address digital citizenship issues. This ex post facto study investigated the online actions of students in a medium-sized K-12 school district and explored possible causal relationships between online misbehavior and student grade and gender based on data collected from state and district surveys. Kohlberg's theory of moral development, Perkins and Berkowitz's social norms theory, and Bandura's social cognitive theory provided the study's theoretical base. Hypotheses were tested using independent-measures t values, a single-factor, independent-measures analysis of variance (ANOVA), and the chi-square test for independence. With respect to the four components of online student behavior---personal safety, digital citizenship, parental involvement, and cyberbullying---analyses determined that there are significant differences between grade level and gender. As the grade level increased, personal safety risks, digital citizenship abuse, and cyberbullying increased, while parental involvement decreased. Males had significantly more personal safety and digital citizenship issues than females but no significant gender difference for parental involvement. Implications for positive social change include raising awareness of local digital citizenship issues with parents, staff, and students, and ultimately mitigating and preventing student online risky behavior.