Search results for "Information Science"
showing 10 items of 3627 documents
Modeling a teacher in a tutorial-like system using Learning Automata
2012
Published version of a chapter in the book: Transactions on Computational Collective Intelligence VIII. Also available from the publisher at: http://dx.doi.org/10.1007/978-3-642-34645-3_2 The goal of this paper is to present a novel approach to model the behavior of a Teacher in a Tutorial- like system. In this model, the Teacher is capable of presenting teaching material from a Socratic-type Domain model via multiple-choice questions. Since this knowledge is stored in the Domain model in chapters with different levels of complexity, the Teacher is able to present learning material of varying degrees of difficulty to the Students. In our model, we propose that the Teacher will be able to as…
Cloud screening and multitemporal unmixing of MERIS FR data
2007
The operational use of MERIS images can be hampered by the presence of clouds. This work presents a cloud screening algorithm that takes advantage of the high spectral and radiometric resolutions of MERIS and the specific location of some of its bands to increase the cloud detection accuracy. Moreover, the proposed algorithm provides a per-pixel probabilistic map of cloud abundance rather than a binary cloud presence flag. In order to test the proposed algorithm we propose a cloud screening validation method based on temporal series. In addition, we evaluate the impact of the cloud screening in a multitemporal unmixing application, where a temporal series of MERIS FR images acquired over Th…
De la sémiotique pour penser la complexité de la communication interpersonnelle :
2013
Algorithms, Artificial Intelligence and Automated Decisions about Workers and the Risks of Discrimination: The Necessary Collective Governance of Dat…
2018
Big data, algorithms and artificial intelligence currently allow entrepreneurs to process information about their employees in a far more efficient manner and at a much lower cost than has been the case until now. This makes it possible to profile workers automatically and even allows technology itself to replace human resources supervisors and managers and to make decisions that have legal effects on the employees (recruitment, promotion, dismissals, etc.). This entails great risks of discrimination by the technology in command, as well as the defencelessness of the worker, who is unaware of the reasons underlying such a decision. This study analyses the guarantees established in the exist…
Unidireccionalidad, promoción partidista y polarización. Actividad en Twitter de los candidatos a la presidencia del Gobierno de España en las ele…
2022
Este trabajo analiza el uso de Twitter por parte de los candidatos a la presidencia del Gobierno de España de los cinco principales partidos de ámbito nacional -PSOE, PP, Vox, Podemos y Ciudadanos- en las campañas de las elecciones generales celebradas en abril y noviembre de 2019. El objetivo principal es determinar cuáles fueron las estrategias de utilización de la red de microblogging por parte de los cabezas de lista, tanto en actividad, interacción y notoriedad como en temáticas y desarrollo discursivo, así como sus similitudes y diferencias. El objetivo secundario es estudiar la evolu- ción de dichas estrategias tanto entre ambas campañas como respecto a comicios anteriores. Para ello…
Relationship and correspondence between different impact indicators in a sample of articles of excellence
2016
The objective was to compare the impact factor to 2 years of self-citations (IF2Y) with impact factor 2 years without self-citations (IF2YWS) and IF2Y with the impact factor to 5 years (IF5Y) as well as IF2YWS with SCImago Journal Rank (SJR) about journals where they were published articles of excellence in smoking by Spanish authors in the period 2008-2012. The search was conducted in the SCI-E and the SSCI-E on November 25, 2013. Were selected documents that had the h index of the strategy global sample (number of articles that have at least that number of citations) to search using the descriptors "smok ∗" OR "tobac ∗". A total of 69 articles by Spanish authors were recovered from 55 jou…
Percolation on correlated random networks
2011
We consider a class of random, weighted networks, obtained through a redefinition of patterns in an Hopfield-like model and, by performing percolation processes, we get information about topology and resilience properties of the networks themselves. Given the weighted nature of the graphs, different kinds of bond percolation can be studied: stochastic (deleting links randomly) and deterministic (deleting links based on rank weights), each mimicking a different physical process. The evolution of the network is accordingly different, as evidenced by the behavior of the largest component size and of the distribution of cluster sizes. In particular, we can derive that weak ties are crucial in o…
Multiscale Information Storage of Linear Long-Range Correlated Stochastic Processes
2019
Information storage, reflecting the capability of a dynamical system to keep predictable information during its evolution over time, is a key element of intrinsic distributed computation, useful for the description of the dynamical complexity of several physical and biological processes. Here we introduce a parametric approach which allows one to compute information storage across multiple timescales in stochastic processes displaying both short-term dynamics and long-range correlations (LRC). Our analysis is performed in the popular framework of multiscale entropy, whereby a time series is first "coarse grained" at the chosen timescale through low-pass filtering and downsampling, and then …
Conjugacy problem for braid groups and Garside groups
2003
We present a new algorithm to solve the conjugacy problem in Artin braid groups, which is faster than the one presented by Birman, Ko and Lee. This algorithm can be applied not only to braid groups, but to all Garside groups (which include finite type Artin groups and torus knot groups among others).
La Universitat de València y sus documentos. El fondo de pavordes en el Archivo de la Catedral de Valencia
2020
Las tres instituciones que estan detras de la fundacion de la Universidad de Valencia: el rey, la Iglesia y el gobierno municipal, son la causa de que los documentos que se conservan actualmente es...