A model for problems' representation at various generic levels to assist inventive design

International audienceInventive design requires specific competences. Designing involves creating new concepts out of acquired knowledge and requires cognitive competences. TRIZ, a theory for inventive problem-solving, is based on the abstraction of knowledge to be able to make analogies with any technical domain. This principle of abstraction is of great interest, but it also requires the ability to shift from a high level of abstraction to a more specific level. The links between abstract models of problems and more specific ones are missing in TRIZ. This paper proposes a UML model to make this link to enable the construction of abstract formulation of problems from a functional description of the systems. A case study illustrates the different descriptions of the problems and the link between them

SPL 704 MHz beta 0.65 cavities mechanical design for EUCARD.

International audienceThe optimizations, based on electromechanical simulations have been carried out in order the design 704 Mhz 5-cell elliptic superconducting cavity for the intermediate energy section (beta 0.65) for accelerating high intensity proton beams in pulsed mode

A Formal Model for the Representation of Problems Based on TRIZ

International audienceDesigning, and especially in inventive design, is mainly understanding and solving problems. Simon describes the designer activity as a problem forming, finding and solving activity. Nevertheless, if the importance of the problem solving process is admitted, a lot of methods exist to guide the inventive process without integrating this fact. TRIZ proposes to answer this lack by focusing the design on a problem framing and solving process. On a generic point of view, TRIZ can be described as a rule-based problem solving method. In fact it is a whole of methods and tools which aim is to identify problems and formulate them through generic frames enabling the use of patterns of solutions. One of the disadvantages of TRIZ is its lack of formalization which implies a lot of difficulties to implement it and even to understand it. To fulfill this lack a formalization, a process is described in this article and a resulted partial model is presented. This model is partial as it is only focused on the TRIZ problem formulation frames. The implementation of the model is presented to show the interest of the model and to validate its efficiency. This implementation is argued by the description of a problem formulated by the use of a prototype of software

Discovery of a Very Low Mass Triple with Late-M and T Dwarf Components: LP 704-48/SDSS J0006-0852AB

We report the identification of the M9 dwarf SDSS J000649.16-085246.3 as a spectral binary and radial velocity variable with components straddling the hydrogen burning mass limit. Low-resolution near-infrared spectroscopy reveals spectral features indicative of a T dwarf companion, and spectral template fitting yields component types of M8.5\pm0.5 and T5\pm1. High-resolution near-infrared spectroscopy with Keck/NIRSPEC reveals pronounced radial velocity variations with a semi-amplitude of 8.2\pm0.4 km/s. From these we determine an orbital period of 147.6\pm1.5 days and eccentricity of 0.10\pm0.07, making SDSS J0006-0852AB the third tightest very low mass binary known. This system is also found to have a common proper motion companion, the inactive M7 dwarf LP 704-48, at a projected separation of 820\pm120 AU. The lack of H-alpha emission in both M dwarf components indicates that this system is relatively old, as confirmed by evolutionary model analysis of the tight binary. LP 704-48/SDSS J0006-0852AB is the lowest-mass confirmed triple identified to date, and one of only seven candidate and confirmed triples with total masses below 0.3 Msun currently known. We show that current star and brown dwarf formation models cannot produce triple systems like LP 704-48/SDSS J0006-0852AB, and we rule out Kozai-Lidov perturbations and tidal circularization as a viable mechanism to shrink the inner orbit. The similarities between this system and the recently uncovered low-mass eclipsing triples NLTT 41135AB/41136 and LHS 6343ABC suggest that substellar tertiaries may be common in wide M dwarf pairs.Comment: 19 pages, 20 figures, accepted to Ap

The DESIR Facility at GANIL-SPIRAL2: The Transfer Beam Lines

International audienceThe new ISOL facility SPIRAL2 is currently being built at GANIL, Caen France. The commissioning of the accelerator is in progress since 2015. SPIRAL2 will produce a large number of new radioactive ion beams (RIB) at high intensities. In 2019, the DESIR facility will receive beams from the upgraded SPIRAL1 facility of GANIL (stable beam and target fragmentation), from the S3 Low Energy Branch (fusion-evaporation and deep-inelastic reactions). In order to deliver the RIB to the experimental set-ups installed in the DESIR hall, 110 meters of beam line are studied since 2014. This paper will focus on the recent studies which have been done on these transfer lines: beam optics and errors calculations, quadrupoles, diagnostics and mechanical designs

Benchmark Analyses of Electrostatic Devices for SPIRAL2-DESIR Beam Lines

International audienceThe new ISOL facility SPIRAL2 is currently being built at GANIL, Caen France. The commissioning of the accelerator is in progress since 2015. SPIRAL2 will produce a large number of new radioactive ion beams (RIB) at high intensities. In 2023, the DESIR facility will receive beams from the upgraded SPIRAL1 facility of GANIL (stable beam and target fragmentation), from the S3 Low Energy Branch (fusion-evaporation and deep-inelastic reactions). In order to deliver the RIB to the experimental set-ups installed in the DESIR hall, 140 meters of beam line are studied since 2014. The transfert lines are today fully design and building will start in 2018. Electrostatic devices (quadrupoles, steerers and deflectors) have been intensively study using various tools. This paper will focus on the detail results of a benchmark using OPERA3D and Comsol Multiphysics apply to the DESIR quadrupole conception

Validation du modèle ProSe sur l’année 2003 et simulation prospective de programmes de mesures à l’horizon 2012 entre Paris et Poses

Etude réalisée dans le cadre du programme de interdisciplinaire de recherche PIREN-Seine (CNRS)info:eu-repo/semantics/publishe

Evolution de la qualité de la Seine en lien avec les progrès de l'assainissement - De 1970 à 2015

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