Search results for "exam"
showing 10 items of 1241 documents
Financial wealth, socioemotional wealth, and founder exits: an empirical examination of Chinese IPOs
2021
Initial public offerings (IPOs) are typically viewed as the peak of entrepreneurial success, providing founder-CEOs a chance to profitably exit. Founder-CEOs, however, are often motivated by non-financial considerations in addition to the desire to amass wealth. According to the behavioral agency model, the founder-CEOs’ framing of gains vs. losses of their wealth creation at IPO determines their risk aversion vs. risk taking behaviors. In addition, the behavioral agency model argues that founder-CEOs with a great deal of socioemotional wealth fear losing that wealth. This fear will attenuate their aversion to losing financial wealth. To test our model, we collected a sample of 130 entrepre…
School grading and institutional contexts
2011
We study how the relationship between students' cognitive ability and their school grades depends on institutional contexts. In a simple abstract model, we show that unless competence standards are set at above-school level or the variation of competence across schools is low, students' competence valuation will be heterogeneous, with weaker schools inflating grades or flattening their dependence on competence, therefore reducing the information content and comparability of school grades. Using data from the OECD-PISA 2003 Survey, the model is applied to a sample of four countries, namely Australia, Germany, Italy, and the Netherlands. We find that in Australia, schools' heterogeneity does …
Determinants of COVID-19 Vaccine Rollouts and Their Effects on Health Outcomes
2022
Background Vaccination against the coronavirus disease (SARS-CoV-2) is understood to be the key way out of the COVID-19 pandemic. Limited evidence exists on the determinants of vaccine rollouts and their health effects at the country level. Objective Examine the determinants of COVID-19 vaccine rollouts and their effects on health outcomes. Methods Ordinary least squares regressions with standard errors clustered at the country level for Cross-section and Panel daily data of vaccinations and various health outcomes (new COVID-19 cases, fatalities, intensive care unit (ICU) admissions) for an unbalanced sample of about 200 countries during the period 16 December 2020 to 20 June 2021. Results…
Pratiques de recherche documentaire et réussite universitaire des étudiants de première année
2013
En ligne sur Cairn : http://www.cairn.info/revue-carrefours-de-l-education-2013-1-page-197.htm; National audience; Consacrée à l'étude des méthodes de recherche des étudiants entrant à l'université, cette recherche empirique s'appuie sur une enquête auprès d'étudiants de première année de Langues. Elle met en évidence la coexistence de différentes méthodes de recherche documentaire parmi les étudiants à l'issue du premier semestre universitaire. Il est montré que les sollicitations des enseignants peuvent être déterminantes pour l'adoption de ces méthodes, et que filles et garçons se singularisent. L'observation de la réussite aux premiers examens universitaires met en évidence les différen…
Studio di validazione dell'ACE-R in lingua italiana nella popolazione degli young-old e degli old-old
2012
Introduction. The main aims of the study were the translation into Italian, and validation subsequently of the Addenbrooke's Cognitive Examination Revised (ACE-R), and the evaluation of its usefulness in discriminating cognitively normal subjects from patients with mild dementia. Methods. The ACE-R was translated and adapted into Italian. The Italian ACE-R was administrated to a group of 179 elderly subjects (72 cognitively intact and 107 subjects with mild dementia, mean age 75.4 years ± 6.4). The group was stratified in two sub-samples according to age, i.e. young-old (< 75 years) and old-old (≥ 75 years), in order to evaluate test's sensitivity and specificity in detecting dementia among…
Erratum: An Inverse Backscatter Problem for Electric Impedance Tomography
2011
We fix an incorrect statement from our paper [M. Hanke, N. Hyvonen, and S. Reusswig, SIAM J. Math. Anal., 41 (2009), pp. 1948–1966] claiming that two different perfectly conducting inclusions necessarily have different backscatter in impedance tomography. We also present a counterexample to show that this kind of nonuniqueness does indeed occur.
IL-6 stimulates annexin 1 expression and translocation and suggests a new biological role as class II acute phase protein.
1998
Annexin 1 (Ax 1), a protein whose synthesis and secretion are induced during the inflammatory response, has been proposed as a mediator of the anti-inflammatory action of glucocorticoids. To gain insight into a broader role of Ax 1 during the inflammatory response, the authors have investigated how pro-inflammatory cytokines [interleukin 1 (IL-1), IL-6 and tumour necrosis factor alpha (TNF-alpha)] affect Ax 1 expression and regulation at transcriptional and translational levels. The authors show that induction of the Ax 1 protein and its translocation to the cell membrane are stimulated by interleukin 6. However neither IL-1 nor TNF-alpha display these effects. Analysis of 5'-deletion mutan…
Empirical mode decomposition and neural network for the classification of electroretinographic data
2013
The processing of biosignals is increasingly being utilized in ambulatory situations in order to extract significant signals' features that can help in clinical diagnosis. However, this task is hampered by the fact that biomedical signals exhibit a complex behaviour characterized by strong non-linear and non-stationary properties that cannot always be perceived by simple visual examination. New processing methods need be considered. In this context, we propose to apply a signal processing method, based on empirical mode decomposition and artificial neural networks, to analyse electroretinograms, i.e. the retinal response to a light flash, with the aim to detect and classify retinal diseases…
H∞ fuzzy control of DC-DC converters with input constraint
2012
Published version of an article in the journal: Mathematical Problems in Engineering. Also available from the publisher at: http://dx.doi.org/10.1155/2012/973082 Open access This paper proposes a method for designing H∞ fuzzy control of DC-DC converters under actuator saturation. Because linear control design methods do not take into account the nonlinearity of the system, a T-S fuzzy model and a controller design approach is used. The designed control not only handles the external disturbance but also the saturation of duty cycle. The input constraint is first transformed into a symmetric saturation which is represented by a polytopic model. Stabilization conditions for the H∞ state feedba…
X-RAY TOMOGRAPHY STUDIES OF PREHISTORIC CERAMIC ARTIFACTS
2014
X-ray Computed Tomography (CT) is a powerful non-destructive technique that can yield interesting structural information not discernible through visual examination only. This paper presents the results of the CT scans of four objects belonging to the Romanian cultural heritage attributed to the Vinča, Cucuteni and Cruceni-Belegiš cultures. The study was performed with an X-ray tomographic device developed at the Department for Applied Nuclear Physics from Horia Hulubei National Institute for Nuclear Physics and Engineering in Măgurele, Romania. This apparatus was specially designed for archaeometric studies of low-Z artifacts: ceramic, wood, bone. The tomographic investigations revealed th…