47 research outputs found
Open CASCADE and rapid prototyping in human carotid lumen reconstruction
Image processing algorithms, CAD-CAM tools and rapid prototyping (RP) techniques are able to produce complex lumen artery replicas. This work presents a system for manufacturing the lumen of human carotid from computed tomography acquisition. The pipe-line of manufacturing process of a human carotid lumen replication is presented. Each stage of the pipe-line is brieïŹy discussed. Technical details of the 3D surface
reconstruction phase, based on the Open Cascade geometric modelling software, and the RP manufaturing process based on Fused Deposition Modelling are presented
Spazio, corpo, mente: lo spazio come luogo di invito all'azione
The goal of this work is to demonstrate the importance of considering the active role of individuals in the space.
The space call to action is the space that connects the recent discoveries in neuroscience with the design of space, without any imposed solution but through the development of a methodology to approach the design of space.
The relationship between mind, body and space connect people to their individual projects of perception and action in the space. Cognitive system and motor acts are dependent on each other and specific neuronal connections -canonic neurons and mirror neurons- inside our brain are responsible about this kind of relationship.
Without a clear plan of action on the space would be impossible for us to perceive anything, behave and to access knowledge about the world
UP School: Motion, Perception, Learning
AbstractThe design strategy common to the educational spaces for the "Up School" based in the metropolitan area of Cagliari aims to frame a flexible learning space open to experimentation and the active exploration of places. Indeed, learning does not merely mean collecting and memorizing information; it also requires the ability to select, connect, understand and integrate, first by acquiring self-awareness and by developing perceptual abilities. Spaceâas experienced in its dynamic dimensionâplays a crucial role in this process. The principles of the dynamic perception of space established by the most important investigations in neuroscience of recent years, were declared by the experimentations of the Bauhaus workshops, ahead of their time, as being strongly related to space, body and mind. Beginning with this premise, the "Up School" projectânursery, preschool and primary schoolâintegrates an innovative educational program with the spatial layout of its environments. These spaces are conceived as a fluid sequence of "affordances" where, from an early age, children can shape their world within a perspective guided by good sustainability practices, enabling technologies and psychomotor equilibrium. Thus, the school system changes by being more conscious of its fulcrum: namely, the psychosomatic dimension of the individual
Anatomical shape reconstruction and manufacturing: solving topological changes of lumen vessel trough geometric approach
Over the last years there has been an increasing growth of interest in Rapid Prototyping (RP) techniques applied to various ïŹelds of medicine. RP makes it possible, in vascular surgery, to produce accurate anatomic replicas of patient vessels. These replicas can help the customization of surgical invasive interventions such as in situ stent-graft insertion in carotid region.
The main goal of this work is to obtain high quality in lumen reconstruction and manufacturing replicas by RP technique. This goal is achieved through the complete control of each phase of the generating process. We present a semi-automatic method for carotid lumen reconstruction based on Boundary Representation (BRep). All parameters inïŹuencing the quality of the shape reconstruction are presented and discussed: shape acquisition, shape reconstruction and shape manufacturing. The shape acquisition starts by extracting the points belonging to the boundary of the lumen
vessel, from Computer Tomography (CT) images. These points, parameterised in a vector, are the input data of the shape reconstruction algorithm based on B-Spline interpolation. The B-Spline type for representing curves and surfaces were chosen because of their properties of continuity and local control.
In the shape reconstruction stage we had to face problems due to the topological change on the vessel structure. For vessel regions where there are not changes of topology, we use the closed B-Spline curves (belonging to adjacent acquisition planes) as generating curves to build a B-Spline surface. For vessel regions with at least a change of topology (ex. bifurcation region) our algorithm split automatically the involved curves to obtain three rectangular B-Spline patches. Such patches are joined together to obtain the bifurcation vessel lumen. The set of lumen surfaces is then inserted in a Boundary Representation in order to get a valid solid. To analyse the quality of the reconstructed shapes, the ïŹnal object is compared with the acquisition image. This solid is correctly tessellated in triangles to produce the data format used by the RP devices (STL)
Regenerate the healthcare building heritage to a new care model: the Houses of Health in Sardinia Region, Italy
The article reports methodology, contents and results of the care space research carried out for the Italian Ministry of Health by the Interuniversity Research Centre TESIS University of Florence and the Department DINSE Turin Polytechnic under the responsibility of Professors R. Del Nord and G. Peretti. The aim of the research was to define methodological and operational tools designing social health structures according to quality standards that define user needs in terms of psycho-social and physical well-being as a priority of the design process. The potential users of this research results are the operators involved in the implementation process of social health construction: from local and central decision makers to designers
Sistemi informatici avanzati per l'analisi stratigrafica archeologica
Questo documento descrive le potenzialitĂ derivanti dallâapplicazione di affermate tecniche e metodologie ICT nellâambito dellâindagine di siti archeologici. Queste metodologie sono organizzate in una architettura di sistema informativo adeguato a supportare lâattivitĂ dellâarcheologo per la ricerca, la didattica e la fruizione. Lâarchitettura proposta cerca di estendere le potenzialitĂ dâuso delle metodologie di analisi non distruttiva, delle tecniche di ricostruzione di geometrie di reperti, e delle tecniche di prototipazione rapida per la manifattura di reperti, utilizzati principalmente nella diagnosi e restauro di beni culturali, ad ambiti piĂč estesi quali lâanalisi stratigrafica archeologica. Lâarchitettura si basa sugli strumenti software ed ambienti di sviluppo sperimentati nel Progetto Laboratorio Avanzato per la Progettazione e la Simulazione al Calcolatore
GRIDA3âa shared resources manager for environmental data analysis and applications
GRIDA3 (Shared Resources Manager for Environmental Data Analysis and Applications) is a multidisciplinary project designed to deliver an integrated system to forge solutions to some environmental challenges such as the constant increase of polluted sites, the sustainability of natural resources usage and the forecast of extreme meteorological events. The GRIDA3 portal is mainly based on Web 2.0 technologies and EnginFrame framework. The portal, now at an advanced stage of development, provides end-users with intuitive Web-interfaces and tools that simplify job submission to the underneath computing resources. The framework manages the user authentication and authorization, then controls the action and job execution into the grid computing environment, collects the results and transforms them into an useful format on the client side. The GRIDA3 Portal framework will provide a problem-solving platform allowing, through appropriate access policies, the integration and the sharing of skills, resources and tools located at multiple sites across federated domains
The potential of eupraxia@sparc_lab for radiation based techniques
A proposal for building a Free Electron Laser, EuPRAXIA@SPARC_LAB, at the Laboratori Nazionali di Frascati, is at present under consideration. This FEL facility will provide a unique combination of a high brightness GeV-range electron beam generated in a X-band RF linac, a 0.5 PW-class laser system and the first FEL source driven by a plasma accelerator. The FEL will produce ultra-bright pulses, with up to 1012 photons/pulse, femtosecond timescale and wavelength down to 3 nm, which lies in the so called âwater windowâ. The experimental activity will be focused on the realization of a plasma driven short wavelength FEL able to provide high-quality photons for a user beamline. In this paper, we describe the main classes of experiments that will be performed at the facility, including coherent diffraction imaging, soft X-ray absorption spectroscopy, Raman spectroscopy, Resonant Inelastic X-ray Scattering and photofragmentation measurements. These techniques will allow studying a variety of samples, both biological and inorganic, providing information about their structure and dynamical behavior. In this context, the possibility of inducing changes in samples via pump pulses leading to the stimulation of chemical reactions or the generation of coherent excitations would tremendously benefit from pulses in the soft X-ray region. High power synchronized optical lasers and a TeraHertz radiation source will indeed be made available for THz and pumpâprobe experiments and a split-and-delay station will allow performing XUV-XUV pumpâprobe experiments.Fil: Balerna, Antonella. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Bartocci, Samanta. UniversitĂ degli studi di Sassari; ItaliaFil: Batignani, Giovanni. UniversitĂ degli studi di Roma "La Sapienza"; ItaliaFil: Cianchi, Alessandro. Universita Tor Vergata; Italia. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Chiadroni, Enrica. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Coreno, Marcello. Istituto Nazionale Di Fisica Nucleare.; Italia. Istituto di Struttura della Materia; ItaliaFil: Cricenti, Antonio. Istituto di Struttura della Materia; ItaliaFil: Dabagov, Sultan. Istituto Nazionale Di Fisica Nucleare.; Italia. National Research Nuclear University; Rusia. Lebedev Physical Institute; RusiaFil: Di Cicco, Andrea. Universita Degli Di Camerino; ItaliaFil: Faiferri, Massimo. UniversitĂ degli studi di Sassari; ItaliaFil: Ferrante, Carino. UniversitĂ degli studi di Roma âLa Sapienzaâ; Italia. Center for Life Nano Science @Sapienza; ItaliaFil: Ferrario, Massimo. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Fumero, Giuseppe. UniversitĂ degli studi di Roma âLa Sapienzaâ; ItaliaFil: Giannessi, Luca. Elettra-Sincrotrone Trieste; Italia. ENEA C.R. Frascati; ItaliaFil: Gunnella, Roberto. Universita Degli Di Camerino; ItaliaFil: Leani, Juan Jose. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - CĂłrdoba. Instituto de FĂsica Enrique Gaviola. Universidad Nacional de CĂłrdoba. Instituto de FĂsica Enrique Gaviola; ArgentinaFil: Lupi, Stefano. UniversitĂ degli studi di Roma âLa Sapienzaâ; Italia. Istituto Nazionale di Fisica Nucleare (INFN) Sezione di Roma La Sapienza; ItaliaFil: Macis, Salvatore. UniversitĂ degli Studi di Roma Tor Vergata; Italia. Istituto Nazionale di Fisica Nucleare (INFN) Sezione di Roma Tor Vergata; ItaliaFil: Manca, Rosa. UniversitĂ degli studi di Sassari; ItaliaFil: Marcelli, Augusto. Istituto Nazionale Di Fisica Nucleare.; Italia. Consiglio Nazionale delle Ricerche; ItaliaFil: Masciovecchio, Claudio. Elettra-Sincrotrone Trieste; ItaliaFil: Minicucci, Marco. Universita Degli Di Camerino; ItaliaFil: Morante, Silvia. Universita Tor Vergata; Italia. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Perfetto, Enrico. Universita Tor Vergata; Italia. Consiglio Nazionale delle Ricerche; ItaliaFil: Petrarca, Massimo. UniversitĂ degli studi di Roma "La Sapienza"; Italia. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Pusceddu, Fabrizio. UniversitĂ degli studi di Sassari; ItaliaFil: Rezvani, Javad. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Robledo, JosĂ© Ignacio. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - CĂłrdoba. Instituto de FĂsica Enrique Gaviola. Universidad Nacional de CĂłrdoba. Instituto de FĂsica Enrique Gaviola; ArgentinaFil: Rossi, Giancarlo. Centro FermiâMuseo Storico della Fisica e Centro Studi e Ricerche âEnrico Fermiâ; Italia. Istituto Nazionale Di Fisica Nucleare.; Italia. Universita Tor Vergata; ItaliaFil: Sanchez, Hector Jorge. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - CĂłrdoba. Instituto de FĂsica Enrique Gaviola. Universidad Nacional de CĂłrdoba. Instituto de FĂsica Enrique Gaviola; ArgentinaFil: Scopigno, Tullio. Center for Life Nano Science @Sapienza; Italia. UniversitĂ degli studi di Roma "La Sapienza"; ItaliaFil: Stefanucci, Gianluca. Universita Tor Vergata; Italia. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Stellato, Francesco. Universita Tor Vergata; Italia. Istituto Nazionale Di Fisica Nucleare.; ItaliaFil: Trapananti, Angela. Universita Degli Di Camerino; ItaliaFil: Villa, Fabio. Istituto Nazionale Di Fisica Nucleare.; Itali
Response of Benthic Foraminifera to organic matter quantity and quality and bioavailable concentrations of metals in Aveiro Lagoon (Portugal)
This work analyses the distribution of living benthic foraminiferal assemblages of surface sediments in different intertidal areas of Ria de Aveiro (Portugal), a polihaline and anthropized coastal lagoon. The relationships among foraminiferal assemblages in association with environmental parameters (temperature, salinity, Eh and pH), grain size, the quantity and quality of organic matter (enrichment in carbohydrates, proteins and lipids), pollution caused by metals, and mineralogical data are studied in an attempt to identify indicators of adaptability to environmental stress. In particular, concentrations of selected metals in the surficial sediment are investigated to assess environmental pollution levels that are further synthetically parameterised by the Pollution Load Index (PLI). The PLI variations allowed the identification of five main polluted areas. Concentrations of metals were also analysed in three extracted phases to evaluate their possible mobility, bioavailability and toxicity in the surficial sediment. Polluted sediment in the form of both organic matter and metals can be found in the most confined zones. Whereas enrichment in organic matter and related biopolymers causes an increase in foraminifera density, pollution by metals leads to a decline in foraminiferal abundance and diversity in those zones. The first situation may be justified by the existence of opportunistic species (with high reproduction rate) that can live in low oxic conditions. The second is explained by the sensitivity of some species to pressure caused by metals. The quality of the organic matter found in these places and the option of a different food source should also explain the tolerance of several species to pollution caused by metals, despite their low reproductive rate in the most polluted areas. In this study, species that are sensitive and tolerant to organic matter and metal enrichment are identified, as is the differential sensitivity/tolerance of some species to metals enrichment.CNPq [401803/2010-4]; [PEst-OE/CTE/UI4035/2014]info:eu-repo/semantics/publishedVersio
The space of integration as a space calling for action
The contemporary city poses ethical problems, but also very practical issues: how can we live together in the same space, especially if âpublic spaceâ, people with cultures, interests, individual needs and not always compatible. It is the problem of integration. One answer is in the nature of human behavior, unable to establish relationships except through personal knowledge processes. (Edelman - Tononi, 2000) We can not force the intersubjectivity conditions without favoring subjective processes of appropriation of space, directly dependent on the ability to act.
The space is thus understood as âspace to call actionâ, as part of a process of perception and action. The space suggests behaviors, but these are read by actors only according to their personal project of action directed to it, more or less conscious and shared. The perceptive process, therefore, does not precede the motor act, but is realized simultaneously to it as an action or mental action simulation. (Rizzolatti - Sinigaglia, 2006)
This condition leads to the awareness that there are two levels of âdesign spaceâ: one a priori of the designer and one of the following people. In this sense it is necessary the development of a design consciousness that considers the space as âfurther configurable entityâ as a cooperative project that captures meaning in the making thanks to the action of subjects within it.
The spatial experience as a process of knowledge and the design of the space as a guide to the active participation of each subject in the construction of its world.
The space provides affordances -opportunities for action- that everyone takes as subjective chance. (Gibson, 1977)
The space is shared, the experience is personal and its sharing is made possible, desirable, but not required, not simply a result of the meeting between groups of people, but between personal action plans do not necessarily shared