A metric to represent the evolution of CAD/analysis models in collaborative design

Computer Aided Design (CAD) and Computer Aided Engineering (CAE) models are often used during product design. Various interactions between the different models must be managed for the designed system to be robust and in accordance with initially defined specifications. Research published to date has for example considered the link between digital mock-up and analysis models. However design/analysis integration must take into consideration the important number of models (digital mock-up and simulation) due to model evolution in time, as well as considering system engineering. To effectively manage modifications made to the system, the dependencies between the different models must be known and the nature of the modification must be characterised to estimate the impact of the modification throughout the dependent models. We propose a technique to describe the nature of a modification which may be used to determine the consequence within other models as well as a way to qualify the modified information. To achieve this, a metric is proposed that allows the qualification and evaluation of data or information, based on the maturity and validity of information and model

Modelling interactions to support and manage collaborative decision-making processes in design situations.

International audienceTo cope with the increasing complexity of products, New Product Development (NPD) projects require the involvement of several designers coming from various functional departments. Designers' decisions imply modifications on different objects and are likely to affect the decision-making of other designers. Two kinds of collaborative activities are strongly inter-related: technical ones that result in decisions regarding the product definition and organizational ones that concern the project organization. In this paper, we aim at developing a new conceptual framework for modelling, managing and tracking decision-making processes that are knowledge-intensive and collaborative. This framework intends to help designers to support both technical and organizational decisions. Its originality comes from the concepts of “specific role” and “action plan” that enhance the recursive modelling of activities and are valuable at different detail levels of the decisionmaking processes: project, team and individual levels. Specific decision-making models and an industrial case study illustrate the relevance of the proposed framework

PLM interopérable pour la conception intégrée et le travail collaboratif en aéronautique

Résumé - L’entreprise étendue devrait permettre de répondre aux objectifs bien connus de l’industrie aéronautique, à savoir réduire le temps de mise sur le marché, réduire les coûts de développement et partager les risques entre les partenaires. La réalisation d’un tel concept ne pourra passer qu’à travers des approches comme l’ingénierie collaborative, qui vise à lier les départements en charge du développement produit entre les différents partenaires du projet. Dans ce cadre, le succès des plateformes dites « d’ingénierie collaborative » est devenu une des préoccupations majeures des principaux acteurs industriels de l’aérospatial. En même temps, les aéronefs se complexifient indéniablement et sont même déjà hautement pluridisciplinaires. C’est pourquoi, la collaboration dans les projets de développement produit se doit de supporter la conception intégrée. Après avoir fait une brève relecture de la littérature sur ces différents concepts, ce papier présentera les spécifications d’une plateforme d’ingénierie collaborative à destination de l’industrie aéronautique : La plateforme SEINE (Standard pour l’Entreprise Innovante Numérique Etendue). Puis nous verrons comment une telle plateforme pourrait être enrichie en matière de conception intégrée. Abstract - Well known challenges in Aeronautic industry, namely reduced time to market, lower development costs and shared risks between partners, could be reached thanks to the innovative design methods supported by PLM technologies. Reaching such objective will be allowed through methods like integrated design or collaborative engineering enabling close exchanges between the project partners. In fact, the success of PLM platforms in supporting such methods is becoming one of the major stakes in the global networking organization. At the same time, aircrafts are obviously systems integrating multidisciplinary technologies and companies are highly multiple expertises. This paper proposes a survey on integrated design methods, PLM technologies and related subjects. It also presents the specification and the development of a collaborative design platform, as part of SEINE project (Standard pour l’Entreprise Innovante Etendue), aiming to improve collaboration in French aeronautics supply chain. Finally, this paper proposes how to include multiple expertise and integrated design in this “platform supporting” partners collaboration

PLM-based approach for collaborative design between OEM and suppliers : case study of aeronautic industry.

To achieve different assembly operations on the aircraft structure, the aeronautic OEM needs to create and manage various fixture tools. To cope with these needs, the OEM begun to adopt the supplier integration into the tooling development process. This paper presents a conceptual PLM-based approach to support new business partnership of different suppliers. The new business partnership aims to improve the role of supplier in the different tasks of design, configuration and fabrication of the tooling. The use of the PLM concepts is proposed to enhance the collaboration between OEM and the equipment's suppliers. UML models are proposed to specify the structure of the PLM solution. These models describe the relation between the aircraft assembly project, and the tooling design process

Behaviour change techniques in brief interventions to prevent HIV, STI and unintended pregnancies : a systematic review

Background : Behaviour-change interventions have been consistently considered an essential part of comprehensive HIV, STI and unintended pregnancy prevention. In 2015, the World Health Organization reviewed and assessed existing evidence on brief behavioural interventions, leading to the publication of Brief sexuality-related communication: recommendations for a public health approach. This guideline recommends the use of brief behaviour intervention and communication programmes to promote sexual health and to prevent HIV, STIs, and unintended pregnancies in primary health services, particularly sexual and reproductive health services. Objective : With the purpose of informing the development of a brief behaviour intervention in sexual and reproductive health, we conducted a systematic review of brief intervention to prevent HIV, STI and unintended pregnancies, to identify behaviour change techniques (BCTs) used in health care settings. Methods : Participants from all ages and genders were included. Brief interventions delivered in <= 60 minutes were included. Data was extracted, and interventions were coded following the Behaviour Change Techniques Taxonomy (BCTTv1) guidelines. Results : Of the 6.687 articles identified, 355 were reviewed and 37 studies were included. In effective interventions, we identified 48 behaviour change techniques (BCTs). A core set of 8 frequently used behaviour change techniques was identified: "Problem solving", "Feedback on behaviour", "Social support (unspecified)", "Instructions on how to perform the behaviour", "Information about health consequences", "Information about social and environmental consequences", "Demonstration of the behaviour" and "Credible source". Conclusions : The technical content of brief behaviour interventions was identified in a reliable and standardized way providing preliminary indications on potentially effective techniques to achieve behaviour change

Maturity integrated in a meta model of knowledge to help decision making in preliminary collaborative design of mechanical systems

La conception de systèmes mécaniques, de par son aspect pluridisciplinaire et technologique, fait intervenir et interagir différentes personnes qui travaillent et prennent des décisions ensemble, et, participent ensemble à l élaboration du produit. Elles travaillent de manière collaborative cependant elles ne se connaissent pas obligatoirement, ne se situent pas forcément géographiquement sur un site commun, n ont peut-être pas la même culture et n appartiennent pas systématiquement à la même entreprise. La conception préliminaire représente les premières phases du cycle de conception ou le produit est en cours de définition. Le nombre d incertitudes sur les paramètres et les informations produit sont très importantes. Il y a un manque de connaissances important à cette étape du processus de conception qui doit être considéré afin d améliorer et d aider les prises de décisions dans les phases amonts. C est ce manque de connaissances que je me propose de qualifier et caractériser en apportant une réponse à la question résultante: comment prendre en compte le manque de connaissances pour prendre des décisions durant la conception préliminaire collaborative ? Pour se faire, nous proposons un méta-modèle de connaissances permettant de structurer les informations du produit et les connaissances en intégrant la maturité du produit. Cette maturité est définie par une métrique et permet d identifier le niveau de connaissances des concepteurs sur le produit et d orienter la prise de décision grâce à l utilisation d une approche mixte, à la fois qualitative et quantitative. Enfin, nous évaluerons la capacité de ce méta-modèle à générer différent modèles produit, puis sa pertinence avec l implémentation sur un cas industriel.The design of mechanical systems, due to their multi-disciplinary and technological aspects, involves different people who, together, work and make decisions and jointly participate in the development of the product. They work in a collaborative manner; however, they may have different strategies, geographical positions, cultures and do not know the other members of the team. Preliminary design represents the early stages of the design cycle or product definition. A number of uncertainties regarding the parameters and product information are very important. There is an important lack of knowledge at this stage of the design process that must be managed or filled in order to improve and support the decision making in the early phases. It is this lack of knowledge that I propose to qualify and characterise, providing an answer to the question: how does one to take into account the lack of knowledge in decision making during the preliminary design collaboration? To do so, we propose a meta-model for structuring product information and knowledge by integrating product maturity. A metric allows this maturity to be defined, to identify the level of knowledge of the product designers and to guide the decision making, thanks to the use of a qualitative and quantitative approach. Finally, we evaluate the ability of the meta-model to generate the different models produced and its relevance to the implementation in an industrial case.COMPIEGNE-BU (601592101) / SudocSudocFranceF

Innovative PLM-based approach for collaborative design between OEM and suppliers: Case study of aeronautic industry

Abstract: To achieve different assembly operations on the aircraft structure, the aeronautic OEM needs to create and manage various fixture tools. To cope with these needs, the OEM begun to adopt the supplier integration into the tooling development process. This paper presents a conceptual PLM-based approach to support new business partnership of different suppliers. The new business partnership aims to improve the role of supplier in the different tasks of design, configuration and fabrication of the tooling. The use of the PLM concepts is proposed to enhance the collaboration between OEM and the equipment&apos;s suppliers. UML models are proposed to specify the structure of the PLM solution. These models describe the relation between the aircraft assembly project, and the tooling design process

120 Superiority of CT scan over transthoracic echocardiography in predicting aortic regurgitation after TAVI

BackgroundParavalvular aortic regurgitation (AR) occurs in up to 86% of patients undergoing Transcatheter Aortic Valve Implantation (TAVI). Its prevalence remains unchanged after one year follow-up but its determinants are unclear. We sought to evaluate the impact of annulus measurement by transthoracic echocardiography (TTE) and by CT scan on the occurrence of AR.MethodsThe study included 43 symptomatic patients (83±8 years, 72% in NYHA≥III) with severe aortic stenosis [0.76±0.19cm2, mean gradient 42±14mmHg] who underwent TAVI using CoreValve® LLC Percutaneous Aortic Valve Implantation System, Medtronic, Minneapolis USA. Left ventricular outflow tract (LVOT) area was computed from LVOT diameter (21±2mm) by TTE using a spherical model and from CT using an ellipsoidal model according to the larger (25±3mm) and the smaller outflow tract diameters (22±3mm). These data were compared to the prosthesis area and the occurrence of AR after TAVI.ResultsIn patients with AR greater or equal to 2/4 (32%), LVOT area measured by CT was significantly greater as compared to patients with no or mild AR (478±65mm 2 vs. 411±85mm2, p=0.009). Furthermore, the difference between actual prosthesis area and LVOT area measured by CT scan was significantly smaller (113±55 vs. 171±67, p=0.009) in patients with significant AR (≥2/4) after TAVI. In contrast, LVOT area from TTE did not correlate with AR severity.ConclusionCT scan is more accurate than TTE for calculating LVOT area for prosthesis sizing before TAVI in order to avoid post-implantation AR

Optimisation et robustesse pour la prise de décision dans un contexte de conception intégrée et collaborative

La conception de produits est aujourd’hui une activité à la fois individuelle et collaborative. Une solution de modélisation pour le partage de l’information Produit-Processus-Organisation a été élaborée à travers le projet IPPOP. La solution conceptuelle et logicielle proposée repose sur un noyau de données commun auquel diverses applications expertes peuvent se connecter pour analyser les comportements du produit, du processus ou de l’organisation et de faire la synthèse (intégration) des nouvelles informations. Le papier présente les résultats concernant l’émergence progressive du produit fondée sur l’intégration d’expertise : le choix des composants technologiques. Chacune des expertises fait apparaître une proposition spécifique du produit (et sa géométrie associée) telle que peut la « voir » un expert. Ensuite, certaines techniques d’optimisation et d’analyse de la robustesse permettent d’analyser l’ensemble des variabilités de chacune des propositions de conception afin d’assister les acteurs dans la prise de décision

Severe bronchiolitis in infants born very preterm and neurodevelopmental outcome at 2 years

Preterm infants are at greater risk of bronchopulmonary dysplasia, which is associated with neurodevelopmental impairment. These infants are also more likely to develop severe bronchiolitis, which can contribute to neurodevelopmental impairment. The aim of this study was to determine whether severe bronchiolitis in very preterm infants (born before 33 weeks of gestation) was associated with an increased risk of neurodevelopmental impairment at 2 years of age. We analyzed a population-based cohort of infants (the Loire Infant Follow-up Team cohort) born between 1 January 2003 and 31 December 2009. Severe bronchiolitis was defined as hospitalization due to bronchiolitis during the first year of life. Neurodevelopmental outcome was assessed at 2 years of corrected age. A total of 2,405 infants were included in this analysis and categorized based on neonatal respiratory status: 1,308 (54.4 %) received no respiratory assistance, 864(35.9 %) received oxygen for &lt;28 days, and 167 (6.9 %) had mild and 66 (2.7) moderate or severe bronchopulmonary dysplasia. At 2 years, 502 children displayed non-optimal neurodevelopmental outcome (20.9 %). Moderate or severe bronchopulmonary dysplasia was significantly associated with non-optimal neurodevelopmental outcome at 2 years (adjusted odds ratios (OR) = 2.3 [95 % confidence interval (CI): 1.3–3.9], p = 0.003). In the first year, 318 infants acquired severe bronchiolitis (13.2 %), which was not associated with non-optimal neurodevelopmental outcome (adjusted OR = 1.0 [95 % CI: 0.8–1.4]; p = 0.88). In conclusion, respiratory status in the neonatal period was significantly associated with non-optimal neurodevelopmental outcome at 2 years, while severe bronchiolitis was not