The transportation distance for fuzzy descriptions of measurement

International audienceFuzzy nominal scales were introduced in order to propose a formalism to the representation of empirical quantities by fuzzy subsets of words. This scale proposes a similarity relation and an associated bounded distance that can be used to perform signal processing on fuzzy subsets of words. Due to the limits of this last distance, we studied distances associated to this formalism and proposed a new distance operator named transportation distance. This paper presents the results of these studies

A new distance for fuzzy descriptions of measurements

http://www.imeko.org/publications/wc-2006/PWC-2006-TC7-018u.pdfInternational audienceFuzzy nominal scales were introduced in order to propose a formalism to the representation of empirical quantities by fuzzy subsets of words. This paper presents the results of studies on distances associated to this formalism and proposes a new distance operator

Hand posture recognition with the fuzzy glove

International audienc

Dynamic gesture recognition using signal processing based on fuzzy nominal scales

International audienceDuring the conversion of the state of a physical entity to an information entity the measurement process preserves a part of the properties of the set of physical states. The set of the preserved properties depends on the initial set of properties and on the scale used for the measurement. It defines the set of relations and operators than can be applied to information entities. This means that the measurement scale induces the set of operators that can be used for signal processing. This paper presents some characteristics of fuzzy nominal scales, more specifically the existence of a distance operator on such scales. Numerical data provided by a data glove are transformed into linguistic data with fuzzy nominal scales. Then the processing of linguistic signals measured with a fuzzy nominal scale is presented. Finally the linguistic data given by the glove are then processed to recognize dynamic hand gestures

Presence of atrial natriuretic peptide in two desert rodents: comparison with rat.

International audienceAtrial natriuretic peptide (ANP) was characterized and assayed in plasmas, hearts, and brains of two Algerian desert rodents, Psammomys obesus and Meriones libycus along with vasopressin, which was assayed in hypophyses and hypothalami. Using reverse-phase high-performance liquid chromatography and radioimmunoassay, we showed, in plasmas and hearts of both species of desert rats, the presence of peptides similar to rat N- and C-terminal ANP but in lower amounts than in Wistar rats. Conversely, C-terminal ANP was abundantly detected in hypophyses from Meriones libycus rats. As these peptides, through their diuretic and natriuretic activities, are involved in body fluid regulation and electrolyte balance, the reduction of ANP stores in both plasmas and hearts suggests that diuresis and natriuresis are lowered in both species of mammals adapted to arid environments. This could occur because of the vasopressin-mediated adaptation, but also in response to the low ANP involvement in hydro-osmotic regulations, even in Psammomys, which has a dietary salt loading. On the other hand, the higher C-terminal ANP contents in the hypophysis of Meriones than in Psammomys and Wistar rats remain to be understood