Permeability of a one-dimensional potential barrier

Permeability of one dimensional potential barrie

Spectroscopic reassignment and ground state dissociation energy of molecular iodine

Spectroscopic reassignment and ground state dissociation energy of molecular iodin

A Z_3-graded generalization of supermatrices

We introduce Z_3-graded objects which are the generalization of the more familiar Z_2-graded objects that are used in supersymmetric theories and in many models of non-commutative geometry. First, we introduce the Z_3-graded Grassmann algebra, and we use this object to construct the Z_3-matrices, which are the generalizations of the supermatrices. Then, we generalize the concepts of supertrace and superdeterminant

The use of figures in the evaluation or rural development policies: a quest for knowledge Counting, to tell and understand

Using figures seems to create rigour, objectivity, knowledge and it facilitates comparisons. Consequently, an evalution without figures is hardly conceivable. Nonetheless, objectivity and precision can be just an impression given the fact that figures are constructions built on a modeled description of reality. The simplification of reality operated through a figure can hide subtle elements regarding the way public policies work. If figures can legitimately be used in evaluation, every kinds of figures and evaluations are not equivalent. Therefore, our main research question is what place for figures in evalution? This contribution relates to research about policy evaluation, seen as a mean to produce knowledge useful for the understanding of policies and their implementation. Based on the analysis of the evaluations of rural development policies conducted by the French ministry of agriculture our goal is to increase practical and theoretical knowledge of those policies through well-designed evalutions.Data, evaluation, methods, rural development policies, Agricultural and Food Policy, R58, Q18, H50,

Crédit et production agricole dans la vallée du fleuve Sénégal

Credit and agricultural production in the Senegal Valley. Which role does credit play in a changing agriculture after the introduction of irrigation and rice cropping ? North Senegal is provid-ing an original answer in the context of economic liberalization and world food crisis.Quel rôle joue le crédit dans une agriculture en pleine mutation, suite à l'introduction de l'irrigation et de la culture du riz ? Le nord du Sénégal apporte une réponse originale, dans le contexte de libéralisation de son économie, puis de crise alimentaire mondiale

L'évaluation du non-marchand : pourquoi et à quelles conditions ?

L’évaluation est de plus en plus présente dans le quotidien des acteurs du monde social et médico-social. Or, ce type d’activité ne s’inscrit pas dans les logiques et régulations marchandes alors même qu’elles constituent le cadre d’analyse de référence de l’économiste. Dès lors, le non marchand bouscule l’économiste standard et les concepts qu’il mobilise. Être en capacité d’appréhender les réalités non marchandes est un vrai défi pour l’économiste souhaitant révéler l’apport, la contribution socio-économique, des organisations dites non marchandes. C’est à la réflexion suscitée par ce défi que la communication souhaite participer nourrit des expériences issues du monde médico-social