Search results for "primary [cosmic radiation]"
showing 10 items of 1110 documents
Identification des compétences à l'école élémentaire :une approche empirique à partir des évaluations institutionnelles
2007
Cet article propose une analyse des résultats des élèves aux évaluations nationales, l’objectif étant de mieux comprendre comment les acquisitions se structurent à l’école primaire. L’intérêt de cette démarche réside principalement dans l’identification de compétences dont la maîtrise est essentielle à la réussite scolaire. L’approche choisie pour traiter la question est résolument empirique et se base sur l’examen des relations statistiques entre les items. Elle permet de répondre à plusieurs questions susceptibles d’intéresser les chercheurs en éducation, mais aussi les acteurs engagés, à différents degrés, dans le pilotage et la gestion pédagogique de l’enseignement primaire. Les évaluat…
Complete Hemocyanin Subunit Sequences of the Hunting SpiderCupiennius salei
2002
Hemocyanins are large copper-containing respiratory proteins found in many arthropod species. Scorpions and orthognath spiders possess a highly conserved 4 x 6-mer hemocyanin that consists of at least seven distinct subunit types (termed a to g). However, many "modern" entelegyne spiders such as Cupiennius salei differ from the standard arachnid scheme and have 2 x 6-mer hemocyanins. Here we report the complete primary structure of the 2 x 6-mer hemocyanin of C. salei as deduced from cDNA sequencing, gel electrophoresis, and matrix-assisted laser desorption spectroscopy. Six distinct subunit types (1 through 6) and three additional allelic sequences were identified. Each 1 x 6-mer half-mole…
Granulocyte functions are independent of arginine availability.
2014
Abstract Arginine depletion via myeloid cell arginase is critically involved in suppression of the adaptive immune system during cancer or chronic inflammation. On the other hand, arginine depletion is being developed as a novel anti-tumor metabolic strategy to deprive arginine-auxotrophic cancer cells of this amino acid. In human immune cells, arginase is mainly expressed constitutively in PMNs. We therefore purified human primary PMNs from healthy donors and analyzed PMN function as the main innate effector cell and arginase producer in the context of arginine deficiency. We demonstrate that human PMN viability, activation-induced IL-8 synthesis, chemotaxis, phagocytosis, generation of RO…
Formación artística en el grado de maestro de primaria de la Universitat de València. Enfoques y propuestas
2014
Este trabajo presenta una propuesta enfocada a mejorar la docencia en el actual grado de maestro de Primaria en lo que a Educación Artística se refiere, según el plan de estudios de la Facultat de Magisteri de la Universitat de València. La implantación del grado es relativamente reciente con lo cual permite plantearse mejoras que conlleven dotar a los futuros maestros de herramientas que optimicen sus conocimientos del área artística. Así, se llevará a cabo una colaboración horizontal basada en la cooperación entre profesores de las diferentes áreas artísticas: Educación Plástica y Música. Por ello, se plantea la puesta en práctica de una metodología innovadora de índole cooperativa, revis…
Sphères privée et professionnelle chez les enseignants du premier degré : comment priorisent-ils ?
2019
Private and professional lives among primary teachers: how they prioritize? Being a teacher in primary school seems far from allowing the articulation of work and private life in such a comfortable manner as seen in collective beliefs. In order to deconstruct the belief considering teachers as privileged, this contribution proposes, based on empirical results (an online survey with 21,642 responses), to report, first, how primary teachers prioritize their private or professional lives. Second, this paper highlights the reasons which lead them to favour one of the two fields, notably when priority is given to private life at the expense of professional life. Referring to the issue of work-fa…
In search of traceability: two decades of calibrated Brewer UV measurements in Sodankylä and Jokioinen
2016
Abstract. The two Brewer spectrophotometers of the Finnish Meteorological Institute at Jokioinen and Sodankylä have been operated according to the highest levels of the WMO∕GAW (World Meteorological Organization∕Global Atmosphere Watch) recommendations with rigorous quality control and quality assurance. The calibration of the instruments is based on annual recalibrations of primary standard lamps in the VTT MIKES Metrology National Standards Laboratory in Finland and an exhaustive measurement program with measurements of standard and working lamps in the on-site optical laboratories. Over the years, the maintenance of the calibration has produced data sets of approximately 2000 lamp scans …
Impaired circadian heart rate variability in Parkinson’s disease: a time-domain analysis in ambulatory setting
2020
Abstract Background Heart rate variability (HRV) decreases in Parkinson’s disease (PD) and it can be considered a marker for cardiovascular dysautonomia. The purpose of this pilot study is to evaluate long-term time-domain analysis of HRV of PD patients and compare the results with those of matched healthy individuals. Methods Idiopathic PD patients without comorbidity impairing HRV, and age-matched healthy individuals were recruited in a pilot study. A long-term time domain analysis of HRV using 24-h ambulatory ECG was performed. Results Overall, 18 PD patients fulfilling inclusion criteria completed the evaluation (mean age was 55.6 ± 8.8, disease duration: 5.0 ± 4.7). Mean SCOPA-AUT scor…
Septins 2, 7 and 9 and MAP4 colocalize along the axoneme in the primary cilium and control ciliary length
2013
International audience; Septins are a large, evolutionarily conserved family of GTPases that form hetero-oligomers and interact with the actin-based cytoskeleton and microtubules. They are involved in scaffolding functions, and form diffusion barriers in budding yeast, the sperm flagellum and the base of primary cilia of kidney epithelial cells. We investigated the role of septins in the primary cilium of retinal pigmented epithelial (RPE) cells, and found that SEPT2 forms a 1:1:1 complex with SEPT7 and SEPT9 and that the three members of this complex colocalize along the length of the axoneme. Similar to observations in kidney epithelial cells, depletion of cilium-localized septins by siRN…
Analysis of a Fast Reserve Unit Behaviour with Additional Modular Synthetic Inertia Control
2021
The paper presents the results of a theoretical study on the behaviour of a battery storage system operated as a Fast Reserve Unit and equipped with additional synthetic inertia control. The Fast Reserve Unit is assumed connected to the transmission system of Sicily, operated as an isolated grid in order to show more clearly the effect of the Fast Reserve Unit intervention during a power imbalance. The unit is controlled also to provide synthetic inertia with a conventional control scheme and with a new scheme proposed by the authors and named “Modular Synthetic Inertia”. The latter has been conceived for offering a modular response as a function of the Rate of Change of Frequency, to avoid…
Color constancy in goldfish: the limits
2000
Color constancy was investigated in behavioral training experiments on colors ranging from blue to yellow, located in the color space close to Planck's locus representing the main changes in natural skylight. Two individual goldfish were trained to peck at a test field of medium hue out of a series of 13-15 yellowish and bluish test fields presented simultaneously on a black background. During training the tank in which the fish were swimming freely was illuminated with white light. Correct choices were rewarded with food. During the tests differently saturated yellow or blue illumination was used. The degree of color constancy was inferred from the choice behavior under these illuminations…