Offre multimédia en bibliothèque jeunesse (L\u27)

La Petite Bibliothèque Ronde s’est intéressée à l’offre numérique de 12 bibliothèques en milieu urbain en France, souvent citées pour leur offre innovante. L’étude a été réalisée par Nicolas Perisse et Jérôme Rivière à partir d’entretiens et de visites auprès des responsables multimédia de leurs EPN (espaces publics numériques). Ces espaces ont été comparés selon quatre critères : le matériel (nombre de postes, caractéristiques et qualité), le fonctionnement (temps d\u27utilisation et âge minimal requis pour y accéder), les contenus proposés aux enfants (logiciels, CD-Rom, internet, sitothèques...). Enfin la question de l’accès à internet et de ses restrictions a été examinée, question importante dans le cadre d’une offre s’adressant à un public enfant

Experimental results of passive vibro-acoustic leak detection in SFR steam generator mock-up

International audience# N° 1121 Experimental results of passive vibro-acoustic leak detection in SFR steam generator mock-up 1 Abstract— Regarding to GEN 4 context, it is necessary to fulfil the high safety standards for sodium fast reactors (SFR), particularly against water-sodium reaction which may occur in the steam generator units (SGU) in case of leak. This reaction can cause severe damages in the component in a short time. Detecting such a leak by visual in-sodium inspection is impossible because of sodium opacity. Hydrogen detection is then used but the time response of this method can be high in certain operating conditions. Active and passive acoustic leak detection methods were studied before SUPERPHENIX plant shutdown in 1997 to detect a water-into-sodium leak with a short time response. In the context of the new R&D studies for SFR, an innovative passive vibro-acoustic method is developed in the framework of a Ph.D. thesis to match with GEN 4 safety requirements. The method consists in assuming that a small leak emits spherical acoustic waves in a broadband frequency domain, which propagate in the liquid sodium and excite the SGU cylindrical shell. These spatially coherent waves are supposed to be buried by a spatially incoherent background noise. The radial velocities of the shell is measured by an array of accelerometers positioned on the external envelop of the SGU and a beamforming treatment is applied to increase the signal-to-noise ratio (SNR) and to detect and localize the acoustic source. Previous numerical experiments were achieved and promising results were obtained. In this paper, experimental results of the proposed passive vibro-acoustic leak detection are presented. The experiment consists in a cylindrical water-filled steel pipe representing a model of SGU shell without tube bundle. A hydrophone emitting an acoustic signal is used to simulate an acoustic monopole. Spatially uncorrelated noise or water-flow induced shell vibrations are considered as the background noise. The beamforming method is applied to vibration signals measured by a linear array of accelerometers on the shell. Satisfying results are obtained regarding to detection and localization of the source smothered by the background noise. This research was carried in the framework of the LabEx CeLyA ("Centre Lyonnais d'Acoustique", ANR-10-LABX-60) by the LVA/ INSA de Lyon, in collaboration with AREVA and the CEA (Commissariat à l'Energie Atomique et aux Energies Alternatives) within the framework of a co-financing partnership. The authors are grateful for the interest and financial support received from these two entities. J. Moriot and O. Gastaldi are with DEN/STPA

Analysis of the Heating Needs in Natatoriums

In the quest of improving energy performance in buildings, swimming facilities stand out due to their excessive consumption. When it comes to scientific research, few publications have addressed this type of facility compared to residential or commercial buildings. The specificity of natatoriums is due to complex processes that challenge indoor environment, building structure maintenance, and energy use in a great extent. Energy saving potential becomes all the more important as these processes are highly consuming and appear not to be optimally tackled. Large discrepancies in energy consumption exist among swimming facilities, and W. Kampel estimated the final annual energy consumption could be lowered by 28% in total in Norway. This study aims at analyzing energy use and power demand in natatoriums. Two models were built utilising the building performance simulation tool, IDA-ICE, along with the Ice Rinks & pool extension. The consumption per square meter of water surface within the model was slightly above the Norwegian statistical average of 4000 kWh/m_ws^2. The analysis brought a deeper understanding about both the software code related to the pool and the heating needs of swimming facility. Energy need due to evaporation appeared to be equivalent to the space-heating needs and even showed to have higher power peak values. Sensitivity analysis were run to investigate influences of key parameters. Four parameters stood out: the pool temperature set-point, the pool area, the n_50 infiltration coefficient, and the pool activity factor. Further analysis focused on the effect these parameters have on the system s behavior. Studies were conducted to explore whether a parameter triggers higher power demand from the air-handling unit or increased loss through the structure, or higher evaporation rate leading to higher energy demand for heating of the pool water. Finally, a comparison with the practical case of a swimming pool at Jøa was established thanks to data retrieved from sensors and energy meters set up there. The use of an integrated heat pump in the air-handling unit at Jøa can be misleading and then only domestic hot water consumption and thermal energy released to the pool are comparable. Both seem to be much higher in the IDA-ICE models. Due to short time framing and high complexity, a model gathering all specific features from Jøa still need to be built and further investigations are required

Diabetes Mellitus (DM) e Hipertensão Arterial Sistêmica (HAS)

A partir da análise dos principais marcadores de saúde da Comunidade de São Mateus, observa-se como prioridade o descontrole da Hipertensão Arterial Sistêmica (HAS) e do Diabetes Mellitus (DM), que continuam sendo um dos maiores problemas enfrentados na região. Tanto a HAS quanto a DM tem consequências drásticas na saúde populacional contribuindo para uma perda na melhora dos indicadores de saúde. Observa-se que quanto às causas de HAS, em 95% dos casos não existem causas orgânicas, os fatores são hereditários e/ou relacionados ao estilo de vida (o uso do álcool, consumo excessivo do sal, obesidade e o stress). Vale destacar que estas últimas causas são modificáveis, buscando-se aumento do vínculo e longitudinalidade no cuidado ao usuário. Ações previstas neste projeto podem representar melhora na qualidade de vida da população, aumento do vínculo e co-responsabilização da saúde com usuários que convivem com HAS e do DM. O envolvimento dos profissionais da ESF é essencial para estruturação das ações voltadas a estes usuários, assim como a participação em processos educacionais visando cuidado e comprometimento com os usuários da comunidade. Espera-se que os resultados das ações seja maior adesão de usuários no controle da HAS e DM, por meio do fortalecimento do vínculo e particpação nas consultas e ações na UBS. Assim, espera-se um declínio do número de usuários que apresentam complicações em virtude da falta de monitoramento da HAs e do DM, num período mais curto possível devido às consequências dessas condições no organismo humano. Para que essa meta seja atingida é necessário auxiliar os pacientes e monitorá-los para verificar se os mesmos têm aferido suas pressões arteriais e se os mesmos estão fazendo o uso dos hipoglicemiantes de forma correta

Germinación, tiempo hídrico y análisis isotópico de Vicia villosa Roth. bajo condiciones de estrés hídrico y salino

Vicia villosa is a potential forage resource in marginal areas associated with its natural reseeding and agronomic attributes. The objectives of this work were to record and analyze the water absorption pattern, determine the germination percentage, estimate the hydrotime parameters and establish the 13C y 15N isotopic composition of the seedling, when Vicia villosa germinates in water and salinity stress conditions. The assays to determine the water absorption pattern and the response to germination were carried out according to the treatment: control (distilled water) and the solutions with potential water (Ya): -0.3; -0.6; -0.8; -1 y -1.2 MPa. The osmolytes were poliethyleneglicol (PEG) and sodium chloride (NaCl). The isotopic composition of the total organic matter (MOT) was determined under control conditions, -0.8 and -1.0 MPa. The absorption of 125 % of water triggered germination. It was estimated that 90 % of germination would be achieved with Ya of -0.6 and -0.8 MPa in water and salinity stress. PEG and NaCl treatments showed an enrichment in 13C and a depletion in 15N with respect to the control. The experimental results lead to the conclusion that this species is more tolerant to salinity than to water stress.Vicia villosa es un recurso forrajero potencial en áreas marginales asociado con su resiembra natural y sus atributos agronómicos. Los objetivos del trabajo fueron registrar y analizar el patrón de absorción de agua, determinar el porcentaje de germinación, estimar los parámetros de tiempo hídrico y establecer la composición isotópica de 13C y 15N de la plántula cuando Vicia villosa germina en condiciones de estrés hídrico y salino. Los ensayos para determinar el patrón de absorción y la respuesta a la germinación se realizaron según el tratamiento: control (agua destilada) y soluciones con potencial agua (Ya): -0,3; -0,6; -0,8; -1 y -1,2 MPa. Los osmolitos fueron poliethylene glicol (PEG) y cloruro de sodio (NaCl). La composición isotópica de la materia orgánica total (MOT) se determinó en condiciones control, -0,8 y -1,0 MPa. La absorción de un 125 % de agua desencadenó la germinación. Se estimó que con Ya de -0,6 y -0,8 MPa se alcanzaría un 90 % de germinación en estrés hídrico y salino. Los tratamientos de PEG y NaCl mostraron un enriquecimiento en 13C y un empobrecimiento en 15N respecto al control. Los resultados experimentales indican que esta especie es más tolerante a la salinidad que al estrés hídrico

Phenomenology, socio-demographic factors and outcome upon discharge of manic and mixed episodes in hospitalized adolescents

Background: The existence of bipolar disorder type I (BD-I) during adolescence is now clearly established whereas there are still some controversies on BD-II and BD-NOS diagnosis, mainly in Europe (O'Dowd in Br Med J 29, 2006). Little is known on the phenomenology and potential short-term prognosis factors of bipolar episodes in this age population. In particular, very few studies examine this issue on inpatients in the European context of free access to care. Objective: To describe the phenomenology of acute manic and mixed episodes in hospitalized adolescents and to analyse potential predictive factors associated with clinical improvement at discharge and length of hospitalization. Methods: A total of 80 subjects, aged 12–20 years, consecutively hospitalized for a manic or mixed episode. Socio-demographic and clinical data were extracted by reviewing patients' charts. We used a multivariate analysis to evaluate short-term outcome predictors. Results: The sample was characterized by severe impairment, high rates of psychotic features (N = 50, 62.5%), a long duration of stay (mean 80.4 days), and an overall good improvement (86% very much or much improved). Thirty-three (41.3 %) patients had a history of depressive episodes, 13 (16.3%) had manic or brief psychotic episodes but only 3 (3.7%) had a history of attention deficit/ hyperactivity disorders. More manic episodes than mixed episodes were identified in subjects with mental retardation (MR) and in subjects from migrant and/or low socio-economic families. Overall severity and female gender predicted better improvement in GAF scores. Poor insight and the existence of psychotic features predicted longer duration of stay. Conclusion: These results suggest that severe manic and mixed episodes in adolescents with BD-I need prolonged inpatient care to improve and that socio-cultural factors and MR should be examined more closely in youth with BD

A Retrospective Analysis of Sheep Generated by Somatic Cell Nuclear Transfer

Somatic cell nuclear transfer (SCNT) is one of the primary methods for production of genetically engineered sheep, which allows for gene editing or transgene introduction in somatic cells. The use of SCNT eliminates the risk of genetic mosaicism in embryos and animals that is commonly observed after zygote micromanipulations. This retrospective analysis of SCNT in sheep performed at Utah State University, spanning from 2016 to 2021, examined parameters that may impact pregnancy and full-term development, including donor oocytes (donor age), donor cell lines, SCNT parameters (time of oocyte activation following SCNT, number of transferred embryos, in vitro maturation and culture conditions), and recipients (surgical number and ovulatory status), as well as factors that may correlate with large offspring syndrome or abnormal offspring syndrome (LOS/AOS) in the fetuses and lambs. Our findings indicated that compared to prepubertal oocytes, the SCNT embryos produced from adult sheep oocytes had comparable in vitro maturation rates, pregnancy and full-term development rates, as well as SCNT efficiency. In addition, earlier activation time of SCNT embryos (e.g. 24-26 hours post maturation) was correlated to the early pregnancy loss rate, full-term rate, and SCNT efficiency. Compared to our standard serum-containing medium, commercial serum-free culture medium showed a positive correlation with the full-term development of sheep SCNT embryos. Transferring 15-30 embryos per recipient resulted in consistently good pregnancy rates. Surgical numbers and ovulatory status (having at least one follicle between 6-12mm in size or a corpus hemorrhagicum (CH)) of recipients did not affect pregnancy and full-term development rates. In summary, this retrospective analysis identified parameters for improving pregnancy and full-term development of SCNT embryos in sheep

La formación del profesional universitario en el marco del desarrollo sostenible

Con el fin de promover la creación de empresas fundadas y llevadas adelante por alumnos universitarios que puedan generar empleo e ingresos significativos en relación con el producto bruto interno y que, por lo tanto, tengan un impacto positivo en el medio en el que se insertan, hemos planteado un proyecto de investigación cuyo objetivo es desarrollar estrategias para lograr una formación emprendedora en estudiantes universitarios que se constituyan en profesionales y emprendedores capaces de conducir de manera exitosa los emprendimientos industriales en los que participen[1]. Este trabajo se concentra en describir dicho proyecto, el estado de la cuestión, objetivos, hipótesis y metodología.   [1] El proyecto se encuentra radicado en el Departamento de Ciencias Económicas de la Universidad Nacional de La Matanza. https://economicas.unlam.edu.ar/descargas/4_B221.pd