Tool based supporting collaborative design from specification development to CAD modelling

International audienceManagement of dynamic information interdependencies and as well as management of multiple perspectives from specification development to conceptual design, as well as from conceptual design to detailed design are critical elements of collaborative and distributed design. Supporting collaborative design with computer technology is a strategy to enhance the ability of actors to interact with each other and with computational resources during different phases of product design and development. However, many observations from the industry and research support the evidence that both specification development phase and conceptual design are poorly supported by collaborative tools. Furthermore, though CAD tools support detail design, it is imperative to develop new collaborative design tools or renovate traditional standalone CAD systems by making it collaborative-native. Consequently, the first goal of this paper is to propose the development of collaborative tools related to the conceptual design. The second goal is the development of a mechanism for communication between the developed collaborative conceptual design tools and actually CAD tools. The mechanism and architecture of the developed tool for collaborative conceptual design is presented. A design problem illustrates the concepts discussed in the paper

Multi-domain product modelling: from requirements to cad and simulation tools.

Today, in a very competitive industrial context, different companies have difficulties to respect delays in design and manufacturing of multi-domain product. These difficulties are most of time due to the non respect of requirements defined at the beginning of the project development, during the Function Performance Specifications phase. Furthermore, an important problem during multi-domain products design and development process is the communication between experts of different domains. To answer to this problem, the authors propose in this paper to describe and analyze this problematic through a meta-model. They focus only on mecatronic product. From the proposed meta-model analysis, they develop two possible links between both mechanical and electronic domains in a model: (1) between models and (2) between analysis tools of different domains. The application of this model to a concrete example shows that we can link all the main common data of a product design and development to the modeling and simulation tools of different domains

Multi-domain product modelling: from requirements to cad and simulation tools.

Today, in a very competitive industrial context, different companies have difficulties to respect delays in design and manufacturing of multi-domain product. These difficulties are most of time due to the non respect of requirements defined at the beginning of the project development, during the Function Performance Specifications phase. Furthermore, an important problem during multi-domain products design and development process is the communication between experts of different domains. To answer to this problem, the authors propose in this paper to describe and analyze this problematic through a meta-model. They focus only on mecatronic product. From the proposed meta-model analysis, they develop two possible links between both mechanical and electronic domains in a model: (1) between models and (2) between analysis tools of different domains. The application of this model to a concrete example shows that we can link all the main common data of a product design and development to the modeling and simulation tools of different domains

New ABA-Hypersensitive Arabidopsis Mutants Are Affected in Loci Mediating Responses to Water Deficit and Dickeya dadantii Infection

On water deficit, abscisic acid (ABA) induces stomata closure to reduce water loss by transpiration. To identify Arabidopsis thaliana mutants which transpire less on drought, infrared thermal imaging of leaf temperature has been used to screen for suppressors of an ABA-deficient mutant (aba3-1) cold-leaf phenotype. Three novel mutants, called hot ABA-deficiency suppressor (has), have been identified with hot-leaf phenotypes in the absence of the aba3 mutation. The defective genes imparted no apparent modification to ABA production on water deficit, were inherited recessively and enhanced ABA responses indicating that the proteins encoded are negative regulators of ABA signalling. All three mutants showed ABA-hypersensitive stomata closure and inhibition of root elongation with little modification of growth and development in non-stressed conditions. The has2 mutant also exhibited increased germination inhibition by ABA, while ABA-inducible gene expression was not modified on dehydration, indicating the mutated gene affects early ABA-signalling responses that do not modify transcript levels. In contrast, weak ABA-hypersensitivity relative to mutant developmental phenotypes suggests that HAS3 regulates drought responses by both ABA-dependent and independent pathways. has1 mutant phenotypes were only apparent on stress or ABA treatments, and included reduced water loss on rapid dehydration. The HAS1 locus thus has the required characteristics for a targeted approach to improving resistance to water deficit. In contrast to has2, has1 exhibited only minor changes in susceptibility to Dickeya dadantii despite similar ABA-hypersensitivity, indicating that crosstalk between ABA responses to this pathogen and drought stress can occur through more than one point in the signalling pathway

Tool based supporting collaborative design from specification development to CAD modelling

Management of dynamic information interdependencies and as well as management of multiple perspectives from specification development to conceptual design, as well as from conceptual design to detailed design are critical elements of collaborative and distributed design. Supporting collaborative design with computer technology is a strategy to enhance the ability of actors to interact with each other and with computational resources during different phases of product design and development. However, many observations from the industry and research support the evidence that both specification development phase and conceptual design are poorly supported by collaborative tools. Furthermore, though CAD tools support detail design, it is imperative to develop new collaborative design tools or renovate traditional standalone CAD systems by making it collaborative-native. Consequently, the first goal of this paper is to propose the development of collaborative tools related to the conceptual design. The second goal is the development of a mechanism for communication between the developed collaborative conceptual design tools and actually CAD tools. The mechanism and architecture of the developed tool for collaborative conceptual design is presented. A design problem illustrates the concepts discussed in the paper

Vers des informations méthodologiques interfacées aux outils de modélisation et de simulation pour une meilleure performance du processus de conception multi-métiers

Nous proposons d’identifier les verrous à la communication multi-métiers en nous basant sur un méta-model représentant les méthodes et outils utilisés par les différents domaines, pour en déduire ensuite un model plus détaillé qui sera centré sur l’un des verrous que nous souhaitons débloquer et nous l’illustrerons pas un exempl

MULTI-DOMAIN PRODUCT MODELLING: FROM REQUIREMENTS TO CAD AND SIMULATION TOOLS

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in

A Continuous LoA Compliant Trust Evaluation Method

International audienceThe trust provided by authentication systems is commonly expressed with a Level of Assurance (LoA see 3). If it can be considered as a first process to simplify the expression of trust during the authentication step, it does not handle all the aspects of the authentication mechanism and especially it fails to integrate continuous authentication systems. In this paper, we propose a model based on the Dempster Shafer theory to merge continuous authentication system with more traditional static authentication scheme and to assign a continuous trust level to the current LoA. In addition, this method is proved to be compliant with the LoA frameworks