Search results for "longitudinal"

Enquête longitudinale 3

1981

Enquête longitudinale 1, les "premières inscriptions"

1976

International audience

Quelle attractivité pour les études scientifiques dans une société de la connaissance ?

2014

Depuis une vingtaine d'années, le thème de l'attractivité des filières scientifiques dans l'enseignement supérieur a suscité de nombreuses controverses questionnant, par exemple, l'intérêt des jeunes pour les sciences, la manière de les enseigner ou même la fuite des cerveaux. Cet ouvrage apporte un éclairage longitudinal à ces débats en regardant comment la question de l'attractivité se pose dans les parcours scolaires et universitaires, puis dans les trajectoires professionnelles des jeunes diplômés. À partir de l'exploitation de différentes enquêtes, les auteurs soulignent l'importance des stratégies d'orientation et d'insertion professionnelle des élèves et étudiants face à un marché du…

Unveiling microbial structures during raw microalgae digestion and co-digestion with primary sludge to produce biogas using semi-continuous AnMBR sys…

2020

[EN] Methane production from microalgae can be enhanced through anaerobic co-digestion with carbon-rich substrates and thus mitigate the inhibition risk associated with its low C:N ratio. Acclimated microbial communities for microalgae disruption can be used as a source of natural enzymes in bioenergy production. However, co-substrates with a certain microbial diversity such as primary sludge might shift the microbial structure. Substrates were generated in a Water Resource Recovery Facility (WRRF) and combined as follows: Scenedesmus or Chlorella digestion and microalgae co-digestion with primary sludge. The study was performed using two lab-scale Anaerobic Membrane Bioreactors (AnMBR). Du…

Polychlorinated organic compounds in the Arctic cod liver: trends and profiles

2000

Polychlorinated organic compounds (POCs) have been measured in Arctic cod liver from Vestertana Fjord for a period of 1987-1998. Significant decrease was observed for DDD (p = 0.043), alpha-HCH (p = 0.001), and gamma-HCH (lindane; p = 0.001). Contents of DDE, 2,3,7,8-tetrachlorodibenzofuran, PCBs, chlordanes, chloronaphthalenes, hexachlorobenzene and polychlorodiphenyl ethers had no significant trend. Contents of three hexa- and two heptachlorodibenzofurans and octachlorodibenzofuran increased slightly from 1987 to 1994, but then at very high rate from 1994 to 1998. Trends of HCHs, profiles of PCBs and levels of chlordanes are in accordance with atmospheric long range transport. The hexa-, …

COVID-19 disease - Temporal analyses of complete blood count parameters over course of illness, and relationship to patient demographics and manageme…

2020

Background Detailed temporal analyses of complete (full) blood count (CBC) parameters, their evolution and relationship to patient age, gender, co-morbidities and management outcomes in survivors and non-survivors with COVID-19 disease, could identify prognostic clinical biomarkers. Methods From 29 January 2020 until 28 March 2020, we performed a longitudinal cohort study of COVID-19 inpatients at the Italian National Institute for Infectious Diseases, Rome, Italy. 9 CBC parameters were studied as continuous variables [neutrophils, lymphocytes, monocytes, platelets, mean platelet volume, red blood cell count, haemoglobin concentration, mean red blood cell volume and red blood cell distribu…

Compensatory education: Long-term effects of early parental implication (and III: The C.P.C.)

2007

After describing the program of early compensatory education (from age 3 to 9), called Chicago Child-Parent Centers (CPC), this article collects and analyses the evaluation studies of that Program from a longitudinal perspective – Chicago Longitudinal Study (CLS)-, focusing primarily on methodological problems and afterwards on the short and, mainly, long terms effects, until the targeted subjects of the Program reached the age of 24. The studies confirm the Program has lasting educational (higher performance and educational achievements) and social (higher social adjustment) effects. Subsequently, it analyses which elements of the Program can produce these beneficial effects, which are bas…

La demande d'éducation à l'issue de l'enseignement secondaire

1978

Elites, communities and the limited benefits of mentorship in electronic music

2020

AbstractWhile the emergence of success in creative professions, such as music, has been studied extensively, the link between individual success and collaboration is not yet fully uncovered. Here we aim to fill this gap by analyzing longitudinal data on the co-releasing and mentoring patterns of popular electronic music artists appearing in the annual Top 100 ranking of DJ Magazine. We find that while this ranking list of popularity publishes 100 names, only the top 20 is stable over time, showcasing a lock-in effect on the electronic music elite. Based on the temporal co-release network of top musicians, we extract a diverse community structure characterizing the electronic music industry.…

Panel Data Analysis via Mechanistic Models

2018

Panel data, also known as longitudinal data, consist of a collection of time series. Each time series, which could itself be multivariate, comprises a sequence of measurements taken on a distinct unit. Mechanistic modeling involves writing down scientifically motivated equations describing the collection of dynamic systems giving rise to the observations on each unit. A defining characteristic of panel systems is that the dynamic interaction between units should be negligible. Panel models therefore consist of a collection of independent stochastic processes, generally linked through shared parameters while also having unit-specific parameters. To give the scientist flexibility in model spe…