Investigation of the hydro-mechanical behaviour of fouled ballast

In this study, a fouled ballast taken from the site of Sénissiat, France, was investigated. For the hydraulic behaviour, a large-scale cell was developed allowing drainage and evaporation tests to be carried out with monitoring of both suction and volumetric water content at various positions of the sample. It was observed that the hydraulic conductivity of fouled ballast is decreasing with suction increase, as for common unsaturated soils. The effect of fines content was found to be negligible. For the mechanical behaviour, both monotonic and cyclic triaxial tests were carried out using a large-scale triaxial cell. Various water contents were considered. The results were interpreted in terms of shear strength and permanent axial strain. It appeared that the water content is an important factor to be accounted for since any increase of water content or degree of saturation significantly decreases the shear strength and increases the permanent strain. Constitutive modelling has been attempted based on the experimental results. The model in its current state is capable of describing the effects of stress level, cycle number and water content.     

The strategy of university research laboratories in France

This article attempts to outline the specific traits of French university research. Despite heavy administrative supervision and the supremacy of specialized national organizations (the National Centre for Scientific Research (CNRS), the National Institute of Health and Medical Research), the University laboratories benefit from a certain flexibility which allows the adoption of differentiated behaviours. This is demonstrated by the evolution of a few large units. Nevertheless, the foundations of any collective action in the French university are fragile, a result to a large extent of the status of the teaching faculty whose attachment to the work of management is often found to be indifferent. This statement leads to the perception that university research units are “open” structures, simple fields of interaction between actors whose skills create a precariously balanced situation. This state of affairs explains the essentially political character of French university research management.     

A reciprocal effects model of the temporal ordering of motivation and burnout among youth table tennis players in intensive training settings

Abstract

Using self-determination theory (SDT) (Deci, E.L., & Ryan, R.M. (1985). Intrinsic motivation and self-determination in human behavior. New York, NY: Plenum) as the theoretical framework, we conducted a longitudinal investigation of the temporal ordering between motivation and burnout among youth athletes in intensive training setting. Data were collected from 145 table tennis players in intensive training centres at three time points during a 2-month period characterised by a simultaneous increase in social, physical and psychological demands for these athletes. Structural equation modelling of cross-lagged panel models was used to test the hypotheses. Results showed significant paths leading from athlete burnout – especially sport devaluation and reduced sense of accomplishment – at time 1 to amotivation, intrinsic and extrinsic motivations at times 2 and 3. Only two significant paths leading from motivation (introjected regulation at time 1) to burnout (emotional/physical exhaustion at time 2 and reduced sense of accomplishment at time 3) were identified. Overall, our results suggest that athlete burnout predicts motivation over time but motivation did not predict athlete burnout over time. Results are discussed in terms of current research findings on SDT.     

La acción del entorno sobre el desarrollo del lenguaje infantil

RESUMEN

Las distintas teorías del lenguaje han invocado numerosos mecanismos para explicar la acción del entorno en el desarrollo lingúístico. Más que de aprendizaje del lenguaje debe hablarse de puesta en marcha de la función lingúística, y esta puesta en marcha implica una estructuración a distintos niveles: estructuración del lenguaje (en cuanto a gramática y lengua), comunicación de esta estructura por el niño, y normativización de este proceso a través de una relación de autoridad. Esta dinámica culminará a través de la interlocución en la lengua familiar, que se inscribe en un contexto cultural dado. Aquí se sitúa la noción de “hándicap lingúístico” de las clases populares: la inadecuación del lenguaje familiar al de la escuela. La escuela capta el idioma del niño como una aproximación imperfecta del lenguaje del adulto y le obliga a integrar una lengua estándar que es diferente de la suya. Frente a este tipo de hándicap, que se refiere a las formas de dominación lingúística, está el “hándicap real” determinado por una acción inadecuada del entorno sobre los mecanismos de estructuración de la función lingúística.     

L'evolution des chances d'acces a l'enseignement superieur en France (1962–1966)

The article presents the final conclusions of a series of studies (secondary analyses of statistical data and investigations) carried out by the Centre de Sociologie Européenne between 1964 and 1967 and re-evaluated in the light of the new trends which emerged after 1968 (more open system of education offset by diversification of schemes of study with unequal returns in terms of career openings or prestige). In order to present the problem of the democratisation of higher education by reference to unambiguous data, the authors propose a simple principle for calculating the opportunities for entry to a given level of instruction, or into a given field, as a function of social origin and sex. This systematic method of measuring inequality of academic opportunity, linked to sociological variables, has (a) technical (b) methodological and (c) theoretical advantages.o li](a) From the technical point of view, this calculation which relates the number of students (of a given level) possessing certain social characteristics with the cohort of young people of the same age possessing the same social characteristics, makes it possible to eliminate the ambiguities and statistical fallacies of most analyses of the democratisation of education, which are confined to a comparison of the percentages (or the change over time of the percentages) of different social categories represented within the student population, without taking account of the numerical representation (and the change over time of the numerical representation) of these same categories in the active population. li](b) From the methodological point of view, one has thus at one's disposal an indisputable method of presenting unambiguous conclusions with regard to the chronological development of academic inequalities for a given country, or with regard to international comparisons. li](c) From the theoretical viewpoint, this method translates into statistical terms a principle of sociological theory of much more general application and one which is exemplified in the article; this principle, which might be termed structuralist, states that no value (quantitative or qualitative) should be appraised in itself and for itself, rather that it must always be evaluated in its operational or transformational context by taking into account its positional value in the whole system of relations which link it to other values.By applying this principle, it becomes clear that the sciences are not, in France, more democratic than other fields of study, as is asserted by some authors who are content to compare the percentage of working-class students in the science faculties with the percentage achieved in the other faculties, without relating this rate to the extremely low one for working-class students in the Grandes Écoles scientifiques (the École Polytechnique, etc.): in fact, making such a comparison would highlight the weak positional value of scientific subjects in universities in the total system of scientific institutions of higher education and it would reveal the function of relegation (or reduced acceptance) of children from lower-class families assumed by the science faculties in a system dominated by the Grandes Écoles.On a more general level, this principle of relational intelligibility guides the authors' interpretation of opportunity for entry to higher education in France from 1962 to 1966. During this period, the structure of academic inequalities which in 1962 ranged from one chance in 100 (for the least favoured category) to 50 chances in 100 (for the most highly favoured category) has moved upwards, since, in 1966, the range of opportunities extends roughly from 2% to more than 70%. In other words, the total increase in the rate of enrolment in higher education of 18 to 21 year olds has been distributed, grosso modo, between the different social categories in proportion to existing inequalities. Despite a slight statistical narrowing of this range, the authors' psychosociological analysis attempts to show that the general system of expectations and attitudes of different social classes vis-à-vis the University cannot have been modified by a change which amounts to an upward translation of the structure of inequalities. It is therefore concluded that the policy of increasing enrolment during this period had an almost zero effect (sociologically speaking) on the phenomenon of the democratisation of the university, defined as a process equalising the academic opportunities of different social categories.Again it is the same principle, applied to the analysis of the relative scarcity of academic qualifications, which makes it possible to demonstrate that the expansion of higher education devalues degrees (both in the job market and in the symbolic prestige market) as it democratises them, thus reconstructing again at a higher level, or in fields of study yielding high returns, the academic privileges of the favoured classes.     

The prognostic relevance of psychological factors with regard to participation and success in table-tennis

ABSTRACT

This study examined the prognostic relevance of self-determined motivation, coping, burnout, perceived stress and recovery experienced by 159 youth table-tennis players involved in intensive training centers with regard to their participation and success six years later. Results of ANCOVAs showed that players who still practiced at time 2 (T2; six years later; n = 130) reported lower time 1 (T1; while they were involved in intensive training centers) amotivation (large effect), disengagement-oriented coping, sport devaluation and reduced accomplishment (moderate effects) than their counterparts who dropped out at T2 (n = 29). Results of ANCOVAs also showed that international (n = 18) and/or national players (n = 86) at T2 reported significantly lower T1 amotivation (large effect), disengagement-oriented coping and sport devaluation (moderate effects) in comparison to regional (n = 26) players at T2. Finally results of correlational analyses showed that T2 performance and/or six-year performance progress were significantly and weakly correlated with introjected and external regulations, perceived stress and perceived recovery, and significantly and moderately correlated with amotivation, disengagement-oriented coping, sport devaluation, and reduced accomplishment. Overall, this study provided insights into the role played by self-determined motivation, coping, burnout, perceived stress and recovery in the table-tennis players’ dropout and performance level six years later.     

Higher Education Funding: A Decade of Changes

The authors, two French specialists on the financing of higher education, reflect on the conclusions they drew in an article, "Rethinking the Financing of Post-Compulsory Education", which they published in this review ten years ago. As they foresaw, higher education funding became increasingly based on mixed sources with students being required to pay a greater share of the costs of their education. But mechanisms to make cost sharing increasingly equitable have been refined. At the same time, the determination of actual costs per institution, per course programme, and even per course has become increasingly accurate, and funding is increasingly taking into account the verdict of performance indicators of various kinds. The funding of research is being increasingly differentiated from funding for teaching/learning. Across the board, higher education institutions have had to do more for less.