Search results for " Digital"
showing 10 items of 1026 documents
Unmanned Aerial Vehicle-Based Non Destructive Diagnostics
2018
The paper proposes a cloud platform for analyzing the radiometric infrared videos uploaded by drones which patrol large photovoltaic plants. Thanks to artificial vision algorithms, it does not require any human support to select and associate the framed PV modules to the corresponding ones in the topology of the photovoltaic plant. The algorithm implements an innovative diagnostic protocol, which evaluates the thermal state of the photovoltaic module, whichever the environmental conditions are. The data automatically computed and collected in a multimedia database provide the O&M technicians with significant information to monitor the ageing of each module of the photovoltaic plant. The pro…
Ownership protection of plenoptic images by robust and reversible watermarking
2018
Abstract Plenoptic images are highly demanded for 3D representation of broad scenes. Contrary to the images captured by conventional cameras, plenoptic images carry a considerable amount of angular information, which is very appealing for 3D reconstruction and display of the scene. Plenoptic images are gaining increasing importance in areas like medical imaging, manufacturing control, metrology, or even entertainment business. Thus, the adaptation and refinement of watermarking techniques to plenoptic images is a matter of raising interest. In this paper a new method for plenoptic image watermarking is proposed. A secret key is used to specify the location of logo insertion. Employing discr…
New Method of Microimages Generation for 3D Display
2018
In this paper, we propose a new method for the generation of microimages, which processes real 3D scenes captured with any method that permits the extraction of its depth information. The depth map of the scene, together with its color information, is used to create a point cloud. A set of elemental images of this point cloud is captured synthetically and from it the microimages are computed. The main feature of this method is that the reference plane of displayed images can be set at will, while the empty pixels are avoided. Another advantage of the method is that the center point of displayed images and also their scale and field of view can be set. To show the final results, a 3D InI dis…
Comunicación digital y líneas de fractura en el paradigma de la agenda setting
2006
En: Doxa Comunicación : revista interdisciplinar de estudios de comunicación y ciencias sociales. ISSN 1696-019X n. IV, 2006, pp 37-58 Propone realizar una prospectiva que arroje alguna luz sobre las modificaciones que puede sufrir la teoría de la Agenda Setting, e incluso, eventualmente, su superación, por efecto del desarrollo de los sistemas de comunicación digital. La hipótesis de la que partimos es la de que, si bien la multiplicación y diversificación de medios de comunicación provocada por las tecnologías digitales no tiene por qué haber supuesto, hasta el momento, una diversificación de similar calado en lo que concierne a los temas de interés informativo sancionados por los medios,…
Comparative evaluation of molecular methods for the quantitative measure of torquetenovirus (TTV) viremia, the new surrogate marker of immune compete…
2019
Background Torquetenovirus (TTV) viremia is emerging as a promising tool to assess functional immune competence, to predict posttransplant immune-related complications, and eventually to customize immunosuppression. Methods In this study, 327 blood samples were tested using two real-time PCR (rtPCR) assays both targeted to the untranslated region of the TTV genome. The first assay was an in-house rtPCR developed by our group, the second one was the recently marketed TTV R-GENE assay. Results In the validation study, the TTV R-GENE showed good performances in precision and reproducibility, and sensitivity as low as 12 TTV DNA copies/mL, like previously reported for the in-house rtPCR. The Bl…
Alignment of cone beam computed tomography data using intra-oral fiducial markers.
2009
This article illustrates a new method to align and merge two partially overlapping volumes each of them generated by cone beam computed tomography (CBCT). The aggregate volume covers a larger area of investigation and is determined by localizing one fixed LEGO brick in both of the primal volumes. Based on the LEGO brick an approximate registration of the volumes is determined. Afterwards we improve the transformation by minimizing the difference in overlapping space. In this paper we present a method which automates these two steps and provides an aligned volume.
La mediazione o la difficile arte di mettere d’accordo nella Grecia antica. Cosa dire e come dirlo
2017
Conflict resolution always follows the same pattern, whether on an interpersonal or social level or between cities. This paper aims at illustrating the general patterns and at identifying some means of communication with the parties, both in terms of content and in terms of relationship. Regarding the content of the mediation, the following issues will be adressed: the reasons for the resolution, the appeal to a positive relationship between the parties and the mediator himself, the appeal to ‘collaborative individualism’, and the construction of a deep bond between the parties. Concerning relationships, the following issues will be discussed: the importance of a respectful attitude, the ro…
La evaluación de los materiales didácticos digitales
2017
Este artículo presenta los resultados más relevantes obtenidos a partir de un estudio centrado en analizar las características pedagógicas y tecnológicas de una muestra de materiales de repositorios y plataformas de contenidos educativos digitales actualmente existentes en España destinados a la Educación Primaria tanto de plataformas de contenidos educativos comerciales como de repositorios institucionales públicos. El artículo presenta inicialmente algunas refexiones sobre algunos de los principales aspectos que, en nuestra opinión, deben caracterizar la evaluación de los materiales didácticos en el contexto de la sociedad digital. La metodología empleada en el estudio consistió en el aná…
On the Real-Time Simulation and Control of the Continuous Casting Process
1990
Ll this paper we present a method for controlling in real-time the secondary cooling of the continuous casting machine. The method is based on the heat transfer model, which simulates the temperature distribution of the cast, and on the use of direct digital control (DDC). Off-line simulation results considering the control method is presented.
Contrast perception in digitized panoramic radiographs compared with their film-based origin
2002
Abstract Objectives. We sought to compare the visual image quality of film-based and digitized panoramic radiographs through use of a hole-containing test wedge. Study Design. An aluminum wedge containing 100 cells, of which 90 were given shallow holes, was exposed in the film-based Orthophos CD panoramic unit. Two radiographs subjectively exhibiting optimum contrast were selected. Films were digitized with a charge-coupled device flatbed scanner at 300 dpi. Films and digitized images were rated cellwise by 2 similar groups of 50 observers each with respect to spot perception. Results. The mean sensitivity was 0.26 ± 0.09 for film and 0.20 ± 0.07 for digitized images (P =.000), with a prono…