The several fates of Eliza Fraser

Membre du Jury: Ern, Alexandre et Piperno, Serge et Hecht, Frédéric et Nkonga, Boniface et Bourquin, Frédéric et Poupaud, FrédéricLe but de cette thèse est la construction et l'implémentation d'une méthode de Lagrange-Galerkin d'ordre élevé dans un code de simulation d'interactions fluide/structure. Cette méthode repose sur une formulation par éléments finis mixtes et une méthode des caractéristiques d'ordre 2 en maillage fixe ou mobile. La stabilité de ce schéma a été étudiée dans des cas simples. Des analyses aéroélastiques de structures généralement rencontrées dans le Génie Civil ont été effectuées à travers des tests numériques sur des coupes de ponts en mouvements forcés et libres. Les résultats obtenus ont été comparés à ceux obtenus avec la méthode de Lagrange-Galerkin d'ordre 1 ainsi qu'à des études réalisées en soufflerie expérimentale. Enfin, l'utilisation des méthodes de Lagrange-Galerkin dans des problèmes de contrôle optimal a été étudiée. Un schéma discret linéarisé basé sur la méthode des caractéristiques a été construit et quelques tests simples pour des problèmes de contrôle et d'identification en maillages fixes et mobiles ont été effectués

Examining the Multiple Trajectories Associated with Dropping Out of High School: A Growth Mixture Model Analysis

Historically, students who fail to graduate from secondary school are considered as a single category of school dropouts. However, emerging literature indicates that there may be multiple subgroups of high school dropouts, termed a dropout typology. The authors’ purpose was to assess the extent to which a typology of dropouts was present in a large national dataset and to estimate the influence of the known covariates of dropping out on each of the subgroups. A growth mixture model was estimated using the Education Longitudinal Study 2002 (National Center for Education Statistics, n.d.) dataset and noncumulative grade point average during the first 3 semesters of high school. The model identified 2 main subgroups associated with dropping out, which accounted for 24.6% of the sample but contained 91.8% of the dropouts

Do We Know Who Will Drop Out? A Review of the Predictors of Dropping out of High School: Precision, Sensitivity and Specificity

The purpose of this study is to review the literature on the most accurate indicators of students at risk of dropping out of high school. We used Relative Operating Characteristic (ROC) analysis to compare the sensitivity and specificity of 110 dropout flags across 36 studies. Our results indicate that 1) ROC analysis provides a means to compare the accuracy of different dropout indicators, 2) the majority of dropout flags to date have high precision yet lack accuracy, 3) longitudinal growth models provided the most accurate flags, while 4) the most accurate cross-sectional flags examine low or failing grades. We provide recommendations for future policy and practice. Keywords: Dropout, dropout characteristics, dropout identification, dropout prediction, dropout research, ROC, relative operating characteristic, receiver operating characteristic, growth mixture models, grades

Why Tenth Graders Fail to Finish High School: A Dropout Typology Latent Class Analysis

A large percentage of the students who drop out of K-12 schools in the United States do so at the end of high school, at some point after grade 10. Yet we know little about the differences between different types of students who drop out of the end of high school. The purpose of this study is to examine a typology of high school dropouts from a large nationally representative dataset (ELS:2002) using latent class analysis (LCA). We found three significantly different types of dropouts; Quiet, Jaded, and Involved. Based on this typology of three subgroups, we discuss implications for future dropout intervention research, policy, and practice

Intranasal Immunization with an Archaeal Lipid Mucosal Vaccine Adjuvant and Delivery Formulation Protects against a Respiratory Pathogen Challenge

Archaeal lipid mucosal vaccine adjuvant and delivery (AMVAD) is a safe mucosal adjuvant that elicits long lasting and memory boostable mucosal and systemic immune responses to model antigens such as ovalbumin. In this study, we evaluated the potential of the AMVAD system for eliciting protective immunity against mucosal bacterial infections, using a mouse model of intranasal Francisella tularensis LVS (LVS) challenge. Intranasal immunization of mice with cell free extract of LVS (LVSCE) adjuvanted with the AMVAD system (LVSCE/AMVAD) induced F. tularensis-specific antibody responses in sera and bronchoalveolar lavage fluids, as well as antigen-specific splenocyte proliferation and IL-17 production. More importantly, the AMVAD vaccine partially protected the mice against a lethal intranasal challenge with LVS. Compared to LVSCE immunized and naïve mice, the LVSCE/AMVAD immunized mice showed substantial to significant reduction in pathogen burdens in the lungs and spleens, reduced serum and pulmonary levels of proinflammatory cytokines/chemokines, and longer mean time to death as well as significantly higher survival rates (p<0.05). These results suggest that the AMVAD system is a promising mucosal adjuvant and vaccine delivery technology, and should be explored further for its applications in combating mucosal infectious diseases

Review of Warburton, Carl, 'Buffaloes: Adventures in Arnhem Land': ed. and introduced by David Andrew Roberts and Adrian Parker. 3rd ed. With a 'Foreword' by Professor John Mulvaney (Marleston, SA: Gecko Books, 2007). Pp. xxiii, 261, on high gloss paper, 7 pages of historic black and white photo plates, plus four modem ones in colour. ISBN 0977511413. RRP A$ 19.95.

In 1934 Angus and Robertson, the Sydney publishers, issued an engaging memoir, 'Buffaloes', a book now described as a "Classic Australian True Story", a record of the post-war adventures of two young Australian ex-servicemen, Carl Warburton (b. 1893) and Lawrence Whittaker (b. 1894), the latter an English migrant serving with Australian units. The first was the author of the text. They had met first behind the lines on Gallipoli in 1915, and had resolved to do something audaciously different, should they survive hostilities. At that postwar meeting the toss of a coin determined that the adventure should be in the Northern Territory rather than Brazil. The author is an elusive figure as far as the standard literary histories are concerned, although Morris Miller had in 1940 listed Warburton's later novel, White Poppies (1937), the text of which is discussed now by John Mulvaney in his 'Foreword' to the new edition. The purpose of the latter - and of the present editors - is to contextualise a book which is still sui genesis, despite an earlier wartime reprint. It had been titled 'Life and Adventures in Arnhem Land'