Design status of ASPIICS, an externally occulted coronagraph for PROBA-3

The "sonic region" of the Sun corona remains extremely difficult to observe with spatial resolution and sensitivity sufficient to understand the fine scale phenomena that govern the quiescent solar corona, as well as phenomena that lead to coronal mass ejections (CMEs), which influence space weather. Improvement on this front requires eclipse-like conditions over long observation times. The space-borne coronagraphs flown so far provided a continuous coverage of the external parts of the corona but their over-occulting system did not permit to analyse the part of the white-light corona where the main coronal mass is concentrated. The proposed PROBA-3 Coronagraph System, also known as ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun), with its novel design, will be the first space coronagraph to cover the range of radial distances between ~1.08 and 3 solar radii where the magnetic field plays a crucial role in the coronal dynamics, thus providing continuous observational conditions very close to those during a total solar eclipse. PROBA-3 is first a mission devoted to the in-orbit demonstration of precise formation flying techniques and technologies for future European missions, which will fly ASPIICS as primary payload. The instrument is distributed over two satellites flying in formation (approx. 150m apart) to form a giant coronagraph capable of producing a nearly perfect eclipse allowing observing the sun corona closer to the rim than ever before. The coronagraph instrument is developed by a large European consortium including about 20 partners from 7 countries under the auspices of the European Space Agency. This paper is reviewing the recent improvements and design updates of the ASPIICS instrument as it is stepping into the detailed design phase

Personne de confiance : multi-facettes. Une harmonisation sous la table ?

Master [120] en droit, Université catholique de Louvain, 201

La période de transition vers la parentalité et l'implication paternelle

La transition vers la parentalité est, généralement, un épisode stressant pour les futurs parents. En effet, la grossesse est un merveilleux évènement mais il s’agit également d’une période marquée par d’énormes changements au sein du couple. Effectivement, le passage d’une vie à deux vers une vie à trois modifie considérablement la nature du lien conjugal et, également, le quotidien des deux partenaires. Par conséquent, certains couples peuvent vivre cette période de transition de manière plus ou moins sereine, avec plus ou moins de difficultés. Cependant, la variable de l’implication paternelle est un facteur essentiel, lors de cette période de transition, qui été trop souvent ignorée ou négligée au sein des études scientifiques. C’est la raison pour laquelle le présent mémoire a pour objectif de mettre en évidence son rôle primordial et protecteur pour le bien-être des deux partenaires conjugaux ainsi que pour la qualité de leur relation de couple, lors de la période de transition vers la parentalité. Dans un second temps, les variables qui facilitent ou, au contraire, font obstacle à l’implication paternelle seront également soulignées. Pour ce faire, 30 couples, se préparant à la parentalité pour la première fois, ont été interrogés par questionnaires auto-reportés sur une période de six mois : lors du troisième trimestre de la grossesse et trois mois après la naissance de l’enfant. Ce mémoire a donc pour objectif d’approfondir les connaissances scientifiques en matière de parentalité et de soutien à apporter aux parents. De cette façon, il contribue à l’amélioration du quotidien des nouveaux parents ainsi que la qualité des relations familiales.Master [120] en sciences psychologiques, Université catholique de Louvain, 201

Parental distress, partner parental support and parent-child relationships : a longitudinal dyadic approach

Parenting is one of the biggest challenges in adulthood. This role can cause stress, fatigue and lead to real distress. Parental distress has a negative impact on the entire family system and, in particular, parent-child relationships. However, partner support can be an essential resource for the parent in distress. The general objective of this thesis is to study the relationships between parental distress, support between partners and quality of parent-child relationships. This work will begin with a literature review of the three variables of interest. Next, the results of four empirical studies will be presented to better understand the associations between parental distress, partner support and parent-child relationships. Finally, the results of this thesis will be discussed in the light of their contributions in the field of scientific research and clinical practice.(PSYE - Sciences psychologiques et de l'éducation) -- UCL, 201

Development and validation of the Partner Parental Support Questionnaire

Parenting is generally considered one of the most rewarding roles in adult life. But parenting is also recognized as one of the most demanding role in adulthood. For many parents, support is necessary to cope with costs and stressors associated with parenting, in particular the support that partners provide each other in the field of parenthood. The aim of the current study was to examine the construct validity of the concept of partner parental support and to provide researchers with an instrument to measure it. We conducted a questionnaire-based online study with a community sample of 442 parents using confirmatory factor analyses. We tested and supported a tridimensional structure of partner parental support (i.e., emotional support, concrete support, and role approval). The final version of the Partner Parental Support Questionnaire (PPSQ) contains 15 items and displays strong support for the validity of the questionnaire. We also examined the external validity of the concept of partner parental support. Moderate positive correlations confirm that significant relations exist between partner parental support, marital satisfaction and parental sense of competence. The results are discussed for their theoretical and clinical implications

Regulation between daily exhaustion and support in parenting: A dyadic perspective

The current article serves a dual purpose: to highlight the overlooked and recent concept of parenting-related exhaustion and to propose a specific methodology to test concurrent variations of the parent’s exhaustion with the partner’s exhaustion and her or his perceived and given support. Questionnaire data were collected from 97 mother–father couples over the course of 5 consecutive days. Results from multilevel model analyses revealed day-to-day dyadic variations as well as day-to-day regulation occurring in parental couples. The dyadic variations were shown by the fact that over the week, on the days when one parent felt more exhausted, the other parent’s exhaustion was also high. Dyadic regulation meant that greater exhaustion felt by one parent was associated with greater support from her or his partner. Partner’s extra support was both perceived by the exhausted parent and reported by the support provider (i.e., the partner)

Plus de soutien social pour moins de burn-out

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Daily Exhaustion and Support in Parenting: Impact on the Quality of the Parent–Child Relationship

Objective: The current study aimed to analyze the effect of parenting-related exhaustion on the quality of the parent-child relationship and to explore the moderating role of partner parental support within this association. Method: The method was based on longitudinal data collection and a multi-informant design in which 157 mothers and 157 fathers completed questionnaires once a day during one week. Our statistical model used structural equation modeling. Results: Analyses revealed that parenting-related exhaustion had a negative impact on the quality of the parent-child relationship both for mothers (β = -.17, p < .05) and fathers (β = -.22, p < .05). Our results also provide evidence that partner parental support plays a role in compensating for deleterious consequences of parenting-related exhaustion among mothers as long as such exhaustion remains at a low level (β = -.26, p < .05). Conclusions: Our results provide support for ongoing research into this topic in relation to both mothers and fathers not only in clinically-referred families but also in ordinary ones, to allow preventive measures to be developed and implemented

Contribution of human FcγRs to disease with evidence from human polymorphisms and transgenic animal studies

The biological activities of human IgG antibodies predominantly rely on a family of receptors for the Fc portion of IgG, FcγRs: FcγRI, FcγRIIA, FcγRIIB, FcγRIIC, FcγRIIIA, FcγRIIIB, FcRL5, FcRn and TRIM21. All FcγRs bind IgG at the cell surface, except FcRn and TRIM21 that bind IgG once internalized. The affinity of FcγRs for IgG is determined by polymorphisms of human FcγRs and ranges from 2x10e4 M-1 to 8x10e7 M-1. The biological functions of FcγRs extend from cellular activation or inhibition, IgG-internalization/endocytosis/phagocytosis to IgG transport and recycling.This review focuses on human FcγRs and intends to present an overview of the current understanding of how these receptors may contribute to various pathologies. It will define FcγRs and their polymorphic variants, their affinity for human IgG subclasses, and review the associations found between FcγR polymorphisms and human pathologies. It will also describe the human FcγR-transgenic mice that have been used to study the role of these receptors in autoimmune, inflammatory and allergic disease models