Search results for "Projective test"
showing 10 items of 26 documents
Chebyshev’s Method on Projective Fluids
2020
We demonstrate the acceleration potential of the Chebyshev semi-iterative approach for fluid simulations in Projective Dynamics. The Chebyshev approach has been successfully tested for deformable bodies, where the dynamical system behaves relatively linearly, even though Projective Dynamics, in general, is fundamentally nonlinear. The results for more complex constraints, like fluids, with a particular nonlinear dynamical system, remained unknown so far. We follow a method describing particle-based fluids in Projective Dynamics while replacing the Conjugate Gradient solver with Chebyshev’s method. Our results show that Chebyshev’s method can be successfully applied to fluids and potentially…
Drawings of depressed inpatients: Intentional and unintentional expression of emotional states
1998
Twenty-six patients, aged 21 to 63, hospitalized for depression, and 26 control individuals were asked to make a "funny" and a "sad" drawing, which were scored on 22 variables describing their formal aspects and contents. Results show that drawings of individuals with depression differ from those of control participants on a wide range of variables, sometimes very significantly. Prediction of participants' groups based on eight variables obtained by discriminant analysis was correct in 98% of cases. Results support the usefulness of asking for the two kinds of drawings and suggest that depression is better detected through formal aspects of drawings than through their contents.
Vers des normes francophones pour le Rorschach en système intégré : premiers résultats sur un échantillon de 146 adultes
2004
Resume Cet article presente les principales caracteristiques de l'etude normative francophone pour le Rorschach en systeme integre dans une population adulte. Apres une revue des experiences precedentes, nous justifions les choix methodologiques effectues. Ceux-ci passent par une definition claire de l'echantillon, un controle serre du recrutement des participants, des procedures de qualite mises en œuvre a plusieurs niveaux dans le recueil de donnees. Les resultats de la premiere phase de recueil (n = 146) sont presentes et les principales variables et scores derives du Rorschach sont decrits. Certaines variables cles donnent lieu a comparaison avec les echantillons utilises jusqu'a presen…
Pieri’s Works on Foundations and Philosophy of Mathematics
2021
This chapter discusses Pieri’s individual published works on foundations and philosophy of mathematics, as well as his unpublished but surviving classroom materials on projective and descriptive geometry.
Ghosts in metric-affine higher order curvature gravity
2019
We disprove the widespread belief that higher order curvature theories of gravity in the metric-affine formalism are generally ghost-free. This is clarified by considering a sub-class of theories constructed only with the Ricci tensor and showing that the non-projectively invariant sector propagates ghost-like degrees of freedom. We also explain how these pathologies can be avoided either by imposing a projective symmetry or additional constraints in the gravity sector. Our results put forward that higher order curvature gravity theories generally remain pathological in the metric-affine (and hybrid) formalisms and highlight the key importance of the projective symmetry and/or additional co…
The c-map on groups
2019
We study the projective special Kaehler condition on groups, providing an intrinsic definition of homogeneous projective special Kaehler that includes the previously known examples. We give intrinsic defining equations that may be used without resorting to computations in the special cone, and emphasise certain associated integrability equations. The definition is shown to have the property that the image of such structures under the c-map is necessarily a left-invariant quaternionic Kaehler structure on a Lie group.
Competition of continuous and projective measurements in filtering processes
2016
A quantum system interacting with a repeatedly measured one turns out to be subjected to a non-unitary evolution which can force the former to a specific quantum state. It is shown that in the case where the repeatedly measured system is subjected to the action of its environment, the occurrence of a competition between the dissipation and the measurements can reduce the influence of the decay on the filtering process. Both theoretical predictions and numerical results are presented.
Rorschach et maladies somatiques : Applications et éléments de validité
2004
Resume L'objet de cet article est d'offrir une revue des principales applications du Rorschach au domaine des maladies somatiques. Les etudes se rapportant a trois domaines sont presentees et critiquees (en allant du plus theorique ou plus empirique) : (1) La cotation des contenus par des echelles comme celle de Fisher et Cleveland (1958) ou de Masling, Rabie et Blondheim (1967) ; (2) Un ensemble d'etudes s'interessant a un “ facteur de risque ” psychosomatique (l'alexithymie) ; (3) Un groupe de recherches visant a evaluer les correlations des facteurs Rorschach avec les comportements de soin chez les personnes malades. Ces trois axes de recherche illustrent differentes logiques de relatio…
Picard-Fuchs operators for octic arrangements, I: the case of orphans
2019
We report on $25$ families of projective Calabi-Yau threefolds that do not have a point of maximal unipotent monodromy in their moduli space. The construction is based on an analysis of certain pencils of octic arrangements that were found by C. Meyer. There are seven cases where the Picard-Fuchs operator is of order two and $18$ cases where it is of order four. The birational nature of the Picard-Fuchs operator can be used effectively to distinguish between families whose members have the same Hodge numbers.
The Lang–Vojta Conjectures on Projective Pseudo-Hyperbolic Varieties
2020
These notes grew out of a mini-course given from May 13th to May 17th at UQAM in Montreal during a workshop on Diophantine Approximation and Value Distribution Theory.