284 research outputs found
Predicting Big Data Adoption in Companies With an Explanatory and Predictive Model
The purpose of this paper is to identify the factors that affect the intention to use Big Data Applications in companies. Research into Big Data usage intention and adoption is scarce and much less from the perspective of the use of these techniques in companies. That is why this research focuses on analyzing the adoption of Big Data Applications by companies. Further to a review of the literature, it is proposed to use a UTAUT model as a starting model with the update and incorporation of other variables such as resistance to use and perceived risk, and then to perform a neural network to predict this adoption. With respect to this non-parametric technique, we found that the multilayer perceptron model (MLP) for the use of Big Data Applications in companies obtains higher AUC values, and a better confusion matrix. This paper is a pioneering study using this hybrid methodology on the intention to use Big Data Applications. The result of this research has important implications for the theory and practice of adopting Big Data Applications
Intelligent wristbands for the automatic detection of emotional states for the elderly
Over the last few years, research on computational intelligence is being conducted to detect emotional states of people. This paper proposes the use of intelligent wristbands for the automatic detection of emotional states to develop an application which allows to monitor older people in order to improve their quality of life. The paper describes the hardware design and the cognitive module that allows the recognition of the emotional states. The proposed wristband also integrates a camera that improves the emotion detection.- Programa Operacional Temático Factores de Competitividade(POCI-01-0145-). MINECO/FEDER TIN2015-65515-C4-
1-R and the FPI grant AP2013-01276 awarded to Jaime-Andres Rincon. This
work is supported by COMPETE: POCI-01-0145-FEDER-007043 and FCT -
Fundação para a Ciência e Tecnologia within the projects UID/CEC/00319/2013
and Post-Doc scholarship SFRH/BPD/102696/201
Nuevas inscripciones de época romana procedentes de la Era del Moro (León)
Set of six Roman tombstones found in the wall of Leon in June-July 2020.Se dan a conocer un conjunto de seis lápidas romanas aparecidas en la Muralla de León en junio-julio de 2020
Overview of processing techniques for surface electromyography signals
Surface electromyography (sEMG) is a technology to assess muscle activation,
which is an important component in applications related to diagnosis,
treatment, progression assessment, and rehabilitation of specific individuals'
conditions. Recently, sEMG potential has been shown, since it can be used in a
non-invasive manner; nevertheless, it requires careful signal analysis to
support health professionals reliably. This paper briefly described the basic
concepts involved in the sEMG, such as the physiology of the muscles, the data
acquisition, the signal processing techniques, and classification methods that
may be used to identify disorders or signs of abnormalities according to
muscular patterns. Specifically, classification methods encompass digital
signal processing techniques and machine learning with high potential in the
field. We hope that this work serves as an introduction to researchers
interested in this field.Comment: 11 pages, 7 figure
Técnicas de electrónica de potencia para el electroaturdimiento y electrosacrificio, en el sector del atún rojo
Las técnicas de electropesca utilizadas en agua dulce han
sido adaptadas a la explotación industrial de la pesca en
agua salada de especies como el atún rojo. Por desgracia,
como consecuencia de las descargas eléctricas aplicadas, a
través de un arpón, se producen daños en la espina que
disminuyen la calidad del producto. Se describe aquí un
proyecto que aborda el desarrollo de un convertidor
electrónico de potencia, versátil y que permite estudiar
diferentes formas de onda y su efecto sobre la calidad del
producto.Ginés Méndez España S.L
Preliminary trials on the development of electroslaughtering and electrostunning techniques for bluefin tuna Thunnus thynnus (L., 1758) reared in floating cages
Preliminary results are presented from an ongoing study concerning the relationship between the type of electrical waves used to slaughter bluefin tuna Thunnus thynnus (L., 1758) ongrown in floating cages, and damage to the dorsal column and fish meat, which reduces the fish's commercial value on the Japanese market. Our results indicate that varying the waves' characteristics can reduce those undesirable effects, making this technique the most suitable for bluefin tuna slaughtering, in order to obtain superior meat quality.Se presentan los resultados preliminares del estudio que se lleva a cabo sobre la relación existente entre el tipo de onda eléctrica utilizada para el electrosacrificio del atún rojo Thunnus thynnus (L., 1758), engordado en jaulas flotantes, y los daños producidos en la espina dorsal y la carne de los ejemplares de esta especie, que reducen su valor comercial en el mercado japonés. Se ha observado que se puede mitigar estos efectos indeseados variando las características de las ondas empleadas, haciendo de esta técnica la más apropiada en el sacrificio del atún para obtener una carne de calidad superior.Instituto Español de OceanografíaVersión del editor
Transverse gravity versus observations
Theories of gravity invariant under those diffeomorphisms generated by
transverse vectors, \pd_\m\xi^\m=0 are considered. Such theories are dubbed
transverse, and differ from General Relativity in that the determinant of the
metric, , is a transverse scalar. We comment on diverse ways in which these
models can be constrained using a variety of observations. Generically, an
additional scalar degree of freedom mediates the interaction, so the usual
constraints on scalar-tensor theories have to be imposed. If the purely
gravitational part is Einstein--Hilbert but the matter action is transverse,
the models predict that the three {\em a priori} different concepts of mass
(gravitational active and gravitational passive as well as inertial) are not
equivalent anymore. These transverse deviations from General Relativity are
therefore tightly constrained, actually correlated with existing bounds on
violations of the equivalence principle, local violations of Newton's third law
and/or violation of Local Position Invariance.Comment: 21 pages. Title changed. New section on Newtonian limi
Importance of Post-Translational Modifications for Functionality of a Chloroplast-Localized Carbonic Anhydrase (CAH1) in Arabidopsis thaliana
Background: The Arabidopsis CAH1 alpha-type carbonic anhydrase is one of the few plant proteins known to be targeted to the chloroplast through the secretory pathway. CAH1 is post-translationally modified at several residues by the attachment of N-glycans, resulting in a mature protein harbouring complex-type glycans. The reason of why trafficking through this non-canonical pathway is beneficial for certain chloroplast resident proteins is not yet known. Therefore, to elucidate the significance of glycosylation in trafficking and the effect of glycosylation on the stability and function of the protein, epitope-labelled wild type and mutated versions of CAH1 were expressed in plant cells. Methodology/Principal Findings: Transient expression of mutant CAH1 with disrupted glycosylation sites showed that the protein harbours four, or in certain cases five, N-glycans. While the wild type protein trafficked through the secretory pathway to the chloroplast, the non-glycosylated protein formed aggregates and associated with the ER chaperone BiP, indicating that glycosylation of CAH1 facilitates folding and ER-export. Using cysteine mutants we also assessed the role of disulphide bridge formation in the folding and stability of CAH1. We found that a disulphide bridge between cysteines at positions 27 and 191 in the mature protein was required for correct folding of the protein. Using a mass spectrometric approach we were able to measure the enzymatic activity of CAH1 protein. Under circumstances where protein N-glycosylation is blocked in vivo, the activity of CAH1 is completely inhibited. Conclusions/Significance: We show for the first time the importance of post-translational modifications such as N-glycosylation and intramolecular disulphide bridge formation in folding and trafficking of a protein from the secretory pathway to the chloroplast in higher plants. Requirements for these post-translational modifications for a fully functional native protein explain the need for an alternative route to the chloroplast.This work was supported by the Swedish Research Council (VR), the Kempe Foundations and Carl Tryggers Foundation to GS, and grant numbers BIO2006-08946 and BIO2009-11340 from the Spanish Ministerio de Ciencia e Innovación (MICINN) to A
Efficient Matrix-Element Matching with Sector Showers
A Markovian shower algorithm based on "sector antennae" is presented and its
main properties illustrated. Tree-level full-color matrix elements can be
automatically incorporated in the algorithm and are re-interpreted as
process-dependent 2 -> n antenna functions. In hard parts of phase-space, these
functions generate tree-level matrix-element corrections to the shower. In soft
parts, they should improve the logarithmic accuracy of it. The number of
matrix-element evaluations required per order of matching is 1, with an
unweighting efficiency that remains very high for arbitrary numbers of legs.
Total rates can be augmented to NLO precision in a straightforward way. As a
proof of concept, we present an implementation in the publicly available VINCIA
plug-in to the PYTHIA 8 event generator, for hadronic decays including
tree-level matrix elements through .Comment: 35 pages, 24 figure
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