The current research analyzed the relationship between methamphetamine use, cocaine use and marijuana use within the last 12 months and crime committed within the last 12 months. Crime is defined as drug sales, property and violent crime. The research design is a quantitative approach which uses secondary data analysis of the National Longitudinal Survey of Adolescent Health (Add Health) to provide evidence toward the research question; does illegal drug use increase the risk of committing a crime?The public access, 2008 Wave III data results of this nationally representative sample of adolescents in grades 7 through 12 in the US in the 1994-95 school year was used for analysis. Methamphetamine use was associated with an increased risk of committing all crime, only until cocaine use was controlled for. Once cocaine use was controlled for, methamphetamine use became non-significant. Cocaine use and marijuana use were significant and associated with an increased use of committing a crime.

ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / One of the most important characteristics of an aircraft is its capability to return to its stable trimmed flight state after the occurrence of a disturbance or gust without the pilot intervention. The evaluation of such behavior, known as the aircraft stability, is divided into three sections: Lateral; Directional; and Longitudinal stabilities. The determination of the stability of an experimental aircraft requires the execution of a Flight Test Campaign (FTC). For the stability FTC the test bed should be equipped with a complete Flight Test Instrumentation (FTI) System which is typically composed by: a Pulse Code Modulation (PCM) Data Acquisition System (DAS); A sensor set; An airborne transmitter; and A data recorder. In the real-time operations, live data received over the Telemetry Link, that are processed, distributed and displayed at the Ground Telemetry System (GTS) enhances the FTC safety level and efficiency. The due to the lack of reliability, recorded data is retrieved in the post mission operations to allow the execution of data reduction analysis. This process is time consuming because recorded data has to be downloaded, converted to Engineering Units (EU), sliced, filtered and processed. The reason for the usage of this less efficient process relies in the fact that the real-time Telemetry data is less reliable as compared to recorded data (i.e. noisier). The upcoming iNET technology could provide a very reliable Telemetry Link. Therefore the data reduction analysis can be executed with live telemetry data in quasi-real time after the receipt of all valid tests points. In this sense the Brazilian Flight Test Group (GEEV) along with EMBRAER and with the support of Financiadora de Estudos e Projetos (FINEP) started the development of several applications. This paper presents the design of a tool used in the Longitudinal Static Stability Flight Tests Campaign. The application receives the Telemetry data over either a TCP/IP or a SCRAMnet Network, performs data analysis and test point validation in real time and when all points are gathered it performs the data reduction analysis and automatically creates Hyper Terminal Markup Language (HTML) formatted tests reports. The tool evaluation was executed with the instruction flights for the 2009 Brazilian Flight Test School (CEV). The result shows an efficiency gain for the overall FTC.

Les résultats des recherches suggèrent que le lien longitudinal entre les pratiques parentales (PP) et les problèmes de comportement (PC) est bidirectionnel. Toutefois, peu de recherches ont comparé ce lien en fonction des dyades mère-enfant et père-enfant. À partir d'un échantillon de 209 enfants et de leurs parents (195 mères et 123 pères), cette étude examine le lien entre les PP négatives et les PC extériorisés d'enfants de la maternelle à la troisième année. Ce lien est analysé séparément pour les mères et pour les pères, et ce, sur cinq temps de mesure et en fonction de trois dimensions (rejet affectif, hostilité, inconstance). Pour ce faire, le modèle longitudinal autorégressif à mesures répétées (autoregressive cross-lag longitudinal model) a été utilisé. Les résultats suggèrent que ce lien est bidirectionnel et on peut observer que l'influence réciproque entre les PP et les PC évolue différemment chez les dyades mère-enfant et chez les dyades père-enfant, en fonction des dimensions étudiées. Les implications pour les recherches futures concernant le lien entre les PP et les PC sont discutées.

A shift of Initial Teacher Education (ITE) towards school-based training is underway in England, calling into question the place of a theoretical basis for teaching. Re-examining the relationship between educational theory and classroom practice is therefore particularly timely and links to long-standing discussions in the literature on what constitutes teachers’ professional knowledge, the specific tensions between theory and practice in education and the implications for the structure of ITE. The study is rooted in models of teacher knowledge, of theory and practice nexus and of student teacher development. Within this context, the research offers new insight, picking up where previous studies have left off, by charting over a period of time what happens to students’ initial preconceptions about theory and practice and investigating whether, how and why these change in the course of the subsequent journey to first employment. This is a longitudinal case study: five participants, representing a diverse range of profiles from a 2011-12 cohort, form the case group and data were collected before the course, through various stages of the programme and into first teaching posts through interviews, focus groups and documentary analysis. To contextualise the central case study, survey data from the wider Postgraduate Certificate in Education (PGCE) cohort were also gathered. The research finds these students to be far from naïve as they entered training but identified important shifts in the understanding and role of theory during the PGCE experience. Openness to theoretical perspectives is evident and far from being diminished by practical experience, this comes to assume a more prominent place as the course progresses. By exploring this journey, which culminates in a profile of the thinking of a newly qualified professional in the workplace, a contribution is made to current understanding of the development of knowledge for teaching that may help to inform future programme design. More specifically, the role of the university is reconsidered and suggestions are made for ways of working with students at the various stages of the process.

Dementia is increasing recognized as a major problem to public health worldwide. Prevention and treatment strategies are in critical need. Nowadays, research for dementia usually featured as complex longitudinal studies, which provide extensive information and also propose challenge to statistical methodology. The purpose of this dissertation research was to apply statistical methodology in the field of dementia to strengthen the understanding of dementia from three perspectives: 1) Application of statistical methodology to investigate the association between potential risk factors and incident dementia. 2) Application of statistical methodology to analyze changes over time, or trajectory, in cognitive tests and symptoms. 3) Application of statistical learning methods to predict development of dementia in the future. Prevention of Alzheimer’s disease with Vitamin E and Selenium (PREADViSE) (7547 subjects included) and Alzheimer’s disease Neuroimaging Initiative (ADNI) (591 participants included) were used in this dissertation. The first study, “Self-reported sleep apnea and dementia risk: Findings from the PREADViSE Alzheimer’s disease prevention trial ”, shows that self-reported baseline history of sleep apnea was borderline significantly associated with risk of dementia after adjustment for confounding. Stratified analysis by APOE ε4 carrier status showed that baseline history of sleep apnea was associated with significantly increased risk of dementia in APOE ε4 non-carriers. The second study, “comparison of trajectories of episodic memory for over 10 years between baseline normal and MCI ADNI subjects,” shows that estimated 30% normal subjects at baseline assigned to group 3 and 6 stay stable for over 9 years, and normal subjects at baseline assigned to Group 1 (18.18%) and Group 5 (16.67%) were more likely to develop into dementia. In contrast to groups identified for normal subjects, all trajectory groups for MCI subjects at baseline showed the tendency to decline. The third study, “comparison between neural network and logistic regression in PREADViSE trial,” demonstrates that neural network has slightly better predictive performance than logistic regression, and also it can reveal complex relationships among covariates. In third study, the effect of years of education on response variable depends on years of age, status of APOE ɛ4 allele and memory change.

published_or_final_version / Community Medicine / Doctoral / Doctor of Philosophy

published_or_final_version / Psychology / Doctoral / Doctor of Philosophy

published_or_final_version / Education / Doctoral / Doctor of Philosophy

This investigation examined several dimensions of personality functioning in a longitudinal sample of females. These data are part of an existing project evaluating female development across 3 different time points starting in adolescence and transitioning into adulthood. Subjects were categorized into a clinical group (females with a high degree of psychiatric comorbidity) and a normal control group. All participants were initially recruited when they were between 14-18 years of age, and were followed up twice when they were 19-23, and 24-28. In an attempt to explore possible heterogeneity in personality trait development, the research is presented as three separate studies examining the following: (1) fluctuations in mean-level and rank order stability estimates across time; (2) the validity of established personality trends relative to their association with antisocial behavior; and (3) mechanisms that may contribute to personality trait consistency across development such as neighborhood context. This is the first study to investigate personality functioning across time in females who are disturbed in multiple areas of social and psychological functioning. Results highlight the importance of considering distinct subgroups of the general population when exploring developmental trends in personality.

In modern China, air pollution has become an essential environmental problem. Over the last 2 years, the air pollution problem, as measured by PM 2.5 (particulate matter) is getting worse. My report aims to carry out a longitudinal data analysis of the air quality index (AQI) in 3 main economic zones in China. Longitudinal data, or repeated measures data, can be viewed as multilevel data with repeated measurements nested within individuals. I arrive at some conclusions about why the 3 areas have different AQI, mainly attributed to factors like population, GDP, temperature, humidity, and other factors like whether the area is inland or by the sea. The residual variance is partitioned into a between-zone component (the variance of the zone-level residuals) and a within-zone component (the variance of the city-level residuals). The zone residuals represent unobserved zone characteristics that affect AQI. In this report, the model building is mainly according to the sequence described by West et al (2007) with respect to the bottom-up procedures and the reference by Singer, J. D., & Willett, J. B (2003) which includes the non-linear situations. This report also compares the quartic curve model with piecewise growth model with respect to this data. The final model I reached is a piece wise model with time-level and zone-level predictors and also with temperature by time interactions. / text