Search results for "Space"

Erosion, screening, and migration of tungsten in the JET divertor

2019

The erosion of tungsten (W), induced by the bombardment of plasma and impurity particles, determines the lifetime of plasma-facing components as well as impacting on plasma performance by the influx of W into the confined region. The screening of W by the divertor and the transport of W in the plasma determines largely the W content in the plasma core, but the W source strength itself has a vital impact on this process. The JET tokamak experiment provides access to a large set of W erosion-determining parameters and permits a detailed description of the W source in the divertor closest to the ITER one: (i) effective sputtering yields and fluxes as function of impact energy of intrinsic (Be,…

Students' problems in the identification of subspaces in Linear Algebra

2018

International audience; The goal of the study presented in this paper is the investigation of students' problems with exercises concerning central topics of linear algebra courses at university level. We present the results of our analysis of students' work on an exercise about subspaces of . We evaluated the written solutions of the task as well as transcripts based on videos taken of student groups working on the problem. We identified and classified descriptions of vector spaces and subspaces that varied widely and demonstrated highly different skills in working with geometric or formal algebraic objects. We analyzed how far students could progress in a complex reasoning process, and ide…

Flavigny et le haut-Auxois. Etude des spécificités entre architecture rurale et architecture de bourg

1983

Disparities in physical activity in old age

2015

Walking, physical activity and life-space mobility among older people

2017

Autonomy in mobility is a central component of active ageing. Life-space mobility describes where, when, and how an individual reaches desired destinations. Walking, an important form of physical activity among older people, is a prerequisite for engaging in daily activities. This study explored the cross-sectional and longitudinal relationships between physical activity and life-space mobility. The associations of walking with reasons for going outdoors in different life-space areas, living arrangements, and environmental barriers to mobility were also examined. Data from two larger studies were used: the Life-Space Mobility in Old Age (LISPE) accelerometer substudy (n=174, median age 79.7…

Ultra-High Energy Neutrinos at the Pierre Auger Observatory

2013

The observation of ultrahigh energy neutrinos (UHE nu s) has become a priority in experimental astroparticle physics. UHE nu s can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-going nu) or in the Earth crust (Earth-skimming nu), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and …

Deconstruction and hermeneutical space as keys to understanding the rural

2020

The purpose of this article is to complement the existing literature on defining the rural by suggesting a novel approach that makes possible a holistic understanding of the rural. The proposed approach is based on deconstruction of the concept of the rural and on hermeneutical philosophy. The current approaches applied in rural studies are evaluated through the lens of holistic understanding, and solutions to the observed problems are discussed. The problems of current rural studies stem from inadequate conceptualization and biased social theory. The conceptual problems can be alleviated, firstly, by understanding the concept of space not only literally but also figuratively. Secondly, the…

Exploring dark creativity: the role of power in an unethical marketing task

2020

Creativity is seen as a significant driver for successful marketing activities. However, little attention is paid to its shady side and little research on the prerequisites for unethical behaviour of marketing experts and executives is on hand. In our experimental study, we examine the mutual influence of power, honesty-humility, and benevolent creativity as predictors for ‘dark creativity’ (the use of creative ideas for malevolent actions). Participants (N = 387) were randomly assigned to a high vs. low power condition (role of marketing director vs. marketing intern). Dark creativity was correlated to benevolent creativity, power motive, and honesty-humility, but did not depend on the pow…

The urban design guidance for the unmanaged spaces under elevated expressways upon users’ preferences

2016

There are many bridges in the Iranian major cities. It is still proceeded for constructing new bridges in order to solve traffic problems. The spaces under bridges and the expectations of users are rarely important for city officials and designers. Hence, this research is looking for guidelines of designing the unmanaged spaces under city bridges considering the environmental preferences of users. The main goal of this research is to achieve urban design guideline for designing the unmanaged spaces under elevated expressways based on expectations of individuals. This research is based on theoretical studies in the field of urban design, under bridge spaces, unmanaged spaces as well as envir…

Alteration-Induced Volcano Instability at La Soufrière de Guadeloupe (Eastern Caribbean)

2021

International audience; Volcanoes are unstable structures that deform laterally and frequently experience mass wasting events. Hydrothermal alteration is often invoked as a mechanism that contributes significantly to volcano instability. We present a study that combines laboratory experiments, geophysical data, and large-scale numerical modeling to better understand the influence of alteration on volcano stability, using La Soufrière de Guadeloupe (Eastern Caribbean) as a case study. Laboratory experiments on variably altered (advanced argillic alteration) blocks show that uniaxial compressive strength, Young's modulus, and cohesion decrease as a function of increasing alteration, but that …