ABSTRACT:The recent developments in 3D scanning technologies are not been accompanied by visualization interfaces. We are still using the same types of visual codes as when maps and drawings were made by hand. The available information in 3D scanning data sets is not being fully exploited by current visualization techniques.In this paper we present recent developments regarding the use of 3D scanning data sets for revealing invisible information from archaeological sites. These sites are affected by a common problem, decay processes, such as erosion, that never ceases its action and endangers the persistence of last vestiges of some peoples and cultures. Rock art engravings, or epigraphical inscriptions, are among the most affected by these processes because they are, due to their one nature, carved at the surface of rocks often exposed to climatic agents. The study and interpretation of these motifs and texts is strongly conditioned by the degree of conservation of the imprints left by our ancestors. Every single detail in the remaining carvings can make a huge difference in the conclusions taken by specialists. We have selected two case-studies severely affected by erosion to present the results of the on-going work dedicated to explore in new ways the information contained in 3D scanning data sets. A new method for depicting subtle morphological features in the surface of objects or sites has been developed. It allows to contrast human patterns still present at the surface but invisible to naked eye or by any other archaeological inspection technique. It was called Morphological Residual Model (MRM) because of its ability to contrast the shallowest morphological details, to which we refer as residuals, contained in the wider forms of the backdrop. Afterwards, we have simulated the process of building Polynomial Texture Maps -a widespread technique that as been contributing to archaeological studies for some years -in a 3D virtual environment using the results of MRM calculations. By this, we wish to benefit from the rendering capabilities of RTI-viewer and from its intuitive graphic interface. At the same time, virtual PTM is a way of applying this to areas barred to conventional PTM, like in the case presented of an entire roman city occupying a plateau of several sq. km. The results of this research project are presented and discussed using the two case-studies aforementioned, a Latin inscription from a Roman sanctuary in the north of Portugal and a engraved panel with zoomorphic motifs from a rock art site in the north border of Portugal.

ABSTRACT:The appearance of the Terrestrial Laser Scanners or 3D Scanners in Heritage recording has been relatively recent and it is submitted to a constant evolution determined mainly by the big technological advance in fields like Optics, Signal Processing, Electronics and Computer Science. As they have become popular so suddenly, it is essential to study the behavior of these evolving devices in a variety of scenarios to support an accurate assessment of their capabilities. Until two years ago, TOF (time-of-flight) and PS (phase-shift) technologies could hardly be considered side by side comparable, at least under equal terms and requirements. The first enables much longer ranges, while the latter dominated the short distances producing more accurate data with very high acquisition rates. Today, in a sort of convergent career, the scope of phase-shift technology has grown to near 200 meters and the time-of-flight team have been increasing their speed to figures as 100,000 points per second. In this article we expose the results of the comparison between the data delivered by two scanners based on the two related technologies that categorize today's both long and medium-range scanners. The two have been opposed face to face in the survey of the so called "the Sistine Chapel of the Spanish Romanesque" during the same day, and under the same environmental conditions, using equivalent capture settings. But now that as we noted these technologies can fight in the same arena, can we claim to be able to produce similar results whatever which one we choose? The answer is "no" or a "conditioned yes" at least. Let's leave numbers and nominal specifications behind and see what else makes them behave so differently.

stiffness and pulse wave velocity / Aorta and carotid arteries 137 (0.94 to 1.01) p = 0.096; Obesity OR = 0.47 (0.29 to 1.77) p = 0.003 and Diabetes OR = 2.41 (1.15 -5.05) p = 0.020. Conclusions: According to the results obtained, genetic polymorphisms variables were not in the multivariate analysis equation to determine the increase of the PWV, which can be explained either by being included in the selected variables such as hypertension, or on the other hand, they may not have enough strength to remain in the equation. So, according to this study, PWV has much more to do with behaviors and traditional risk factors than the genetic heritage.P883 Endothelial dysfunction, pulse wave velocity and augmentation index are correlated in subjects with systemic arterial hypertension?

QWURGXFWLRQThis paper describes the results of the VRE-Commerce project, which aims at developing all the necessary technology for the integration of low-cost fast synthetic image generation in electronic commerce applications. The main goal of the project is the development of two model virtual stores focused on the sectors of furniture and ceramics, respectively. The technology developed in the project addresses these two sectors because of their specific needs.The project aims at promoting the development of electronic commerce at European level, specially in small and medium sized enterprises (SMEs), and introducing these technologies in sectors in which the use of that type of tools is not usual, in this case the furniture and ceramics industries. In order to accomplish this, it is necessary to incorporate innovative added-value features by integrating advanced technologies.The basic functionality that is added in the VRE-Commerce system is the possibility of creating virtual ambients, by means of a room planner. The room planner is an intuitive and easy-to-use tool which enables the customer to design a virtual ambient with a standard Internet browser. With this tool the client can design a scene at will, then navigate inside it to choose a point of view and finally request the generation of a picture.The other extra functionality is the realistic image generation, for the visualisation of the virtual ambient. The radiosity illumination algorithm has been used to generate the images. It generates very realistic images and the calculations are only made once per scene although the point of view changes. In order to use the radiosity image generation algorithm in an e-commerce application, it is highly recommended to have a response time of not more than one or two minutes. This restriction makes the use of parallel computing necessary to reduce the response time. This may not be enough to achieve a very fast response due to the high computational cost of the image generation algorithms. So in addition simplifications to the algorithm are required, always trying to minimise the loss of quality.To promote the use of this tool the parallel code should run efficiently in platforms that are affordable for SMEs. By this reason a cluster of PCs has been used for the image generation stage. This platform provides a great computational power at a reasonable price.Some previous works have addressed this application, such as the one described in [5]. Our solution focuses on business-to-consumer situations in which all the system (including the parallel platform for rendering) is owned and maintained by the company which offers the products. However, other operation models are also possible. Also, low cost is emphasised so that SMEs can also benefit from this technology.VRE-Commerce is an 18-month project funded by the IST European research programme. The participants in the project are Universidad Politécnica de Valencia

El objetivo de este trabajo es mostrar algunos desarrollos recientes relacionados con la integración de métodos y herramientas de Sistemas de Información, Procesamiento y Visualización de Datos Geoespaciales en un marco 3D. Con ello se pretende facilitar un marco común que afecta a las fases de toma de datos, procesamiento y análisis de la información, diseño, planificación y gestión de intervenciones relacionadas con la construcción de edificios y modificación de pequeño entornos urbanos. La clave para facilitar la integración de modelos y la interoperabilidad entre herramientas es el desarrollo de un marco semántico. El estándar abierto CityGML define clases y relaciones generales relativos a la gestión de espacios físicos según un modelo geométrico (que extiende el enfoque vectorial típico de los SIG). En este trabajo se añaden algunas funcionalidades ligadas a herramientas de procesamiento y análisis de la información de rango 3D de pequeños entornos urbanos capturada con dispositivos láser terrestres de gran precisión. El software UvaCad desarrollado por el clúster DAVAP proporciona un soporte para la fusión de información de imagen 2D y de rango 3D. Sobre el modelo 3D resultante se ha diseñado e implementado un módulo para la gestión de información sobre edificaciones para los niveles 1 y 2 de CityGML. Gracias a la organización conceptual modular de CityGML, es posible extender el modelo original para incorporar información extraída automáticamente sobre poligonales de planos dominantes a los que se superponen diferentes tipos de etiquetas. La extracción de esta información se lleva a cabo de forma semiautomática y se almacena en forma de base de datos relacional con enlace a recursos obtenidos mediante herramientas de procesamiento y análisis de la información 2D y 3D, incluyendo a) extracción de información métrica a partir del modelo 3D; b) reproyección, corrección y referenciación volumétrica de información planar (vistas, planos, croquis) así como c) herramientas de Visualización Avanzada (incluyendo un módulo VR para simulación de intervenciones) organizadas por capas para facilitar el análisis, diseño y gestión a lo largo de las diferentes fases de las posibles intervenciones.