2016
Autores
Younes, G; Shoker, A; Almeida, PS; Baquero, C;
Publicação
PMLDC@ECOOP
Abstract
Pure operation-based (op-based) Conflict-free Replicated Data Types (CRDTs) are generic and very efficient as they allow for compact solutions in both sent messages and state size. Although the pure op-based model looks promising, it is still not fully understood in terms of practical implementation. In this paper, we explain the challenges faced in implementing pure op-based CRDTs in a real system: the well-known in-memory cache key-value store Redis. Our purpose of choosing Redis is to implement a multi-master replication feature, which the current system lacks. The experience demonstrates that pure op-based CRDTs can be implemented in existing systems with minor changes in the original API.
2016
Autores
Martin, OA; Correia, CM; Gendron, E; Rousset, G; Gratadour, D; Vidal, F; Morris, TJ; Basden, AG; Myers, RM; Neichel, B; Fuscoa, T;
Publicação
JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS
Abstract
In preparation of future multiobject spectrographs (MOS) whose one of the major role is to provide an extensive statistical studies of high redshifted galaxies surveyed, the demonstrator CANARY has been designed to tackle technical challenges related to open-loop adaptive optics (AO) control with jointed Natural Guide Star and Laser Guide Star tomography. We have developed a point spread function (PSF) reconstruction algorithm dedicated to multiobject adaptive optics systems using system telemetry to estimate the PSF potentially anywhere in the observed field, a prerequisite to postprocess AO-corrected observations in integral field spectroscopy. We show how to handle off-axis data to estimate the PSF using atmospheric tomography and compare it to a classical approach that uses on-axis residual phase from a truth sensor observing a natural bright source. We have reconstructed over 450 on-sky CANARY PSFs and we get bias/1-s standard-deviation (std) of 1.3/4.8 on the H-band Strehl ratio (SR) with 92.3% of correlation between reconstructed and sky SR. On the full-width at half-maximum, we get, respectively, 2.94 mas, 19.9 mas, and 88.3% for the bias, std, and correlation. The reference method achieves 0.4/3.5/95% on the SR and 2.71 mas/14.9 mas/92.5% on the FWHM for the bias/std/correlation.
2016
Autores
Queirós, Ricardo;
Publicação
Abstract
O tema do livro é o desenvolvimento de aplicações para Android 6 usando o novo Android Studio e abordando tópicos emergentes como o novo paradigma de desenho Material Design e uma introdução à plataforma Android Wear. O livro aborda os seguintes temas:
- Introdução ao Android e ao Android Studio
- Interface Gráfica e Material Design
- Gestão de Dados, Multimédia e Networking
- Mapas e Localização
- Introdução ao Android Wear
2016
Autores
Ribeiro, AN; Araújo, CR;
Publicação
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Abstract
One of the problems of current software development lies on the existence of solutions to address properly the code portability for the increasing number of platforms. To build abstract models is one efficient and correct way to achieve this. The Model-Driven Software Engineering (MDSE) is a development methodology where models are the key for all project lifecycle, from requisites gathering, through modelling and to the development stage, as well as on testing. Pervasive computing demands the use of several technical specifications, such as wireless connections, advanced electronics, and the Internet, as well as it stresses the need to adjust the user interface layer to each one of the platforms. Using a model-driven approach it is possible to reuse software solutions between different targets, since models are not affected by the device diversity and its evolution. This paper reports on a tool, which is highly parameterizable and driven to support Model-2-Model and Model-2-Code transformations. Also, instead of using a predefined technology, the tool was built to be scalable and extensible for many different targets and also by addressing the user interface layer generation. © Springer International Publishing Switzerland 2016.
2016
Autores
Giménez Gómez, JM; Osório, A; Peris, JE;
Publicação
TOP
Abstract
Pulido et al. (Annals Oper Res 158:133–141, 2008) present an extension of the classical bankruptcy problem (O’Neill in Math Social Sci 2:345–371, 1982) where the involved agents have, apart from the claims vector, an additional reference vector. To analyze this extended problem, they propose the extreme and the diagonal approaches, both of them restricted to the case in which the reference vector is lower than the claims vector. We note that if the claims and the reference vectors are interchanged, the allocation proposed by the extreme approach varies. Therefore, by introducing the idea of impartiality, in the current approach, we propose an extension of their model in which no relation is assumed between the claims and reference vectors. © 2015, Sociedad de Estadística e Investigación Operativa.
2016
Autores
Gonçalves, L; Novo, J; Campilho, A;
Publicação
IMAGE ANALYSIS AND RECOGNITION (ICIAR 2016)
Abstract
In this paper, a Hessian-based strategy, based on the central medialness adaptive principle, was adapted and proposed in a multiscale approach for the 3D segmentation of pulmonary nodules in chest CT scans. This proposal is compared with another well stated Hessian based strategy of the literature, for nodule extraction, in order to demonstrate its accuracy. Several scans from the Lung Image Database Consortium and Image Database Resource Initiative (LIDC-IDRI) database were employed in the test and validation procedure. The scans include a large and heterogeneous set of 569 solid and mostly solid nodules with a large variability in the nodule characteristics and image conditions. The results demonstrated that the proposal offers correct results, similar to the performance of the radiologists, providing accurate nodule segmentations that perform the desirable scenario for a posterior analysis and the eventual lung cancer diagnosis.
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