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De Mera Sanchez P.D.,URJC | Gaya C.G.,Spanish University for Distance Education (UNED) | Perez M.A.S.,Spanish University for Distance Education (UNED)
Procedia Engineering | Year: 2013

Excellence in design is an important differentiating factor between competing products; establishing a key pillar for companies face up with safety the challenges ahead in global markets. The implementation of process management, in turn, has emerged as one of the tools for improving management more effective and its application to design product powering growth vectors, such as innovation and productivity. A project level, the management model of the design process for products manufactured according to BS 7000-2: 2008 can be compared with the models predictive of project management, mainly international PMBOK ® guide and the model developed in Europe, PRINCE2. Potential similarities to be established in comparison shall take into account an integrated vision focus on all levels according to processes as initiation, planning, implementation, monitoring and controlling, and closing. © 2013 The Authors.

Cirio G.,French Institute for Research in Computer Science and Automation | Marchal M.,French Institute for Research in Computer Science and Automation | Otaduy M.A.,URJC | Lecuyer A.,French Institute for Research in Computer Science and Automation
2013 World Haptics Conference, WHC 2013 | Year: 2013

Haptic interaction with different types of materials in the same scene is a challenging task, mainly due to the specific coupling mechanisms that are usually required for either fluid, deformable or rigid media. Dynamically-changing materials, such as melting or freezing objects, present additional challenges by adding another layer of complexity in the interaction between the scene and the haptic proxy. In this paper, we address these issues through a common simulation framework, based on Smoothed-Particle Hydrody-namics, and enable haptic interaction simultaneously with fluid, elastic and rigid bodies, as well as their melting or freezing. We introduce a mechanism to deal with state changes, allowing the perception of haptic feedback during the process, and a set of dynamic mechanisms to enrich the interaction through the proxy. We decouple the haptic and visual loops through a dual GPU implementation. An initial evaluation of the approach is performed through performance and feedback measurements, as well as a small user study assessing the capability of users to recognize the different states of matter they interact with. © 2013 IEEE.

de Mera Sanchez P.D.,URJC | Gaya C.G.,Spanish University for Distance Education (UNED) | Prieto V.F.R.,Spanish University for Distance Education (UNED) | Camprubi F.M.,Spanish University for Distance Education (UNED)
Materials Science Forum | Year: 2014

A key factor to enhance industrial competitiveness is to develop strategies around product design, applying the concept of excellence in all its stages and emphasizing innovation efforts. The process of product design as an important element in the differentiation between competing products needs to lean on effective tools that help to meet the demands of customers in the global competitive markets. In response to this need it arises, the European regulatory paradigm on the design of products, standard BS 7000-2: 2008 [1]. It is worth analyzing the influence on the design of manufactured products of the processes of project management of predictive models used mainly. The processes described in each of the models covered along with those reflected in the aforementioned regulations will provide guidance on any differences or similarities in the various phases at project level. © (2014) Trans Tech Publications, Switzerland.

Rubio-Sanchez M.,URJC | Sanchez A.,URJC
IEEE Transactions on Visualization and Computer Graphics | Year: 2014

Star coordinates is a well-known multivariate visualization method that produces linear dimensionality reduction mappings through a set of radial axes defined by vectors in an observable space. One of its main drawbacks concerns the difficulty to recover attributes of data samples accurately, which typically lie in the [0], [1] interval, given the locations of the low-dimensional embeddings and the vectors. In this paper we show that centering the data can considerably increase attribute estimation accuracy, where data values can be read off approximately by projecting embedded points onto calibrated (i.e., labeled) axes, similarly to classical statistical biplots. In addition, this idea can be coupled with a recently developed orthonormalization process on the axis vectors that prevents unnecessary distortions. We demonstrate that the combination of both approaches not only enhances the estimates, but also provides more faithful representations of the data. © 1995-2012 IEEE.

Ruiz-Hervias J.,Technical University of Madrid | Rico A.,URJC | Martin-Rengel M.A.,Technical University of Madrid | Rodriguez J.,URJC | Gomez Sanchez F.J.,Advanced Material Simulation
LWR Fuel Performance Meeting, Top Fuel 2013 | Year: 2013

It is known that the mechanical properties of nuclear fuel cladding are affected by the presence of hydrides. A number of studies have been devoted to the measurement of the average mechanical properties of the zirconium matrix and the hydrides from a macroscopic point of view. In this paper, nanoindentation techniques were employed to determine the mechanical properties of the zirconium hydrides and of the zirconium matrix separately. The hardness, elastic modulus and yield stress are reported in this work for both phases. To this end, ZIRLO cladding samples pre-hydrided with 150 and 1200 ppm hydrogen and asreceived samples were employed.

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