Opinion mining in Twitter : anàlisi de sentiments o opinions

Actualment estem en l'era de la informació, la nostra societat cada cop necessita més una informació precisa i filtrada, que en molts casos, fins i tot, pot representar l'èxit o la fallida de moltes de les empreses actuals. És per aquest motiu que les xarxes socials suposen un nou canal d'informació, que tractant-la adequadament es poden transformar en resultats de gran valor. Al llarg d'aquest projecte s'ha aprofundit en l'adquisició de la informació mitjançant la xarxa social Twitter i s'ha realitzat una simulació amb dades reals, ponderant les emocions de les dades recollides i arribant en un resultat gràcies als algoritmes de processament del llenguatge natural i classificació de text. Així veient tots els passos a seguir per a poder extreure unes conclusions adients que ens permetin obtenir una globalització capaç de definir si un esdeveniment ha estat positiu, negatiu o neutre.Nowadays we are in the information era, our society needs specific information to their needs, and in many times this represents the success or failure of a company. Is for his reason that the social media have become a very important information channel, which using it properly could help us to achieve very important goals. Throughout this project we got into the gathering information process by using the social media tool Twitter. We've done a simulation with real data pondering the emotions of the information gathered and getting a result thanks to the process algorithms of natural language and text. This simulation helps us to understand the steps to follow to be able to get some conclusions, and decide at the end if an event has been positive, negative or neutral.Actualmente estamos en la era de la información, nuestra sociedad cada vez necesita más una información precisa y filtrada, que en muchos casos, incluso, puede representar el éxito o la quiebra de muchas de las empresas actuales. Es por este motivo que las redes sociales suponen un nuevo canal de información, que tratando adecuadamente se pueden transformar en resultados de gran valor. A lo largo de este proyecto se ha profundizado en la adquisición de la información mediante la red social Twitter y se ha realizado una simulación con datos reales, ponderando las emociones de los datos recogidos y llegando en un resultado gracias a los algoritmos de procesamiento del lenguaje natural y clasificación de texto. Así viendo todos los pasos a seguir para poder extraer unas conclusiones adecuadas que nos permitan obtener una globalización capaz de definir si un evento ha sido positivo, negativo o neutro

Control-oriented thermal modeling methodology for water-cooled PEM fuel-cell-based systems

In this paper, a new control-oriented modeling methodology for the thermal dynamics of water-cooled Proton Exchange Membrane Fuel Cells (PEMFCs) is presented and validated. This methodology is not only useful for control applications, but also can be used for predicting the temperature variation across the stack, allowing to monitor its operation. The methodology has been validated in a real 600-W, 20-cells, water cooled PEMFC, with encouraging results for both the stationary and the transient states. Results show that the proposed methodology is accurate and suitable for control purposes.Peer Reviewe

Control-oriented thermal modeling methodology for water-cooled PEM fuel-cell-based systems

In this paper, a new control-oriented modeling methodology for the thermal dynamics of water-cooled Proton Exchange Membrane Fuel Cells (PEMFCs) is presented and validated. This methodology is not only useful for control applications, but also can be used for predicting the temperature variation across the stack, allowing to monitor its operation. The methodology has been validated in a real 600-W, 20-cells, water cooled PEMFC, with encouraging results for both the stationary and the transient states. Results show that the proposed methodology is accurate and suitable for control purposes.Peer Reviewe

Vivir de la tierra. Organización, conflicto y cambio en la Cataluña agraria : la Unió de Pagesos, 1973-1979

La Unió de Pagesos (UP) se constituyó a finales del franquismo como una más de las experiencias sindicales unitarias del periodo. Pese a ser una organización apartidista, su dilatado proceso de construcción estuvo atravesado por las dinámicas centrífugas que afectaron al conjunto de fuerzas antifranquistas durante la transición a la democracia. Llegados a 1979, UPera una de los pocos sindicatos unitarios supervivientes. En este artículo exploramos los orígenes, construcción y consolidación del sindicato campesino en un contexto de cambio político del cual fue un agente imprescindible en el campo catalánFounded during the late Franco's dictatorship, the Unió de Pagesos (Peasants Union) was one among other experiences of unitary trade unions of the period. Despite its nonpartisan policy, its construction was mediated by the centrifuge dynamic which affected the anti-Francoist forces as a whole during the years of the transition to democracy. The union reached 1979 as one of the few surviving unitarian trade unions. This paper proposes to explore its origins, construction and consolidation in the political change context, of which it was a fundamental agent in the Catalan countrysid

Pixinwav: Residual steganography for hiding pixels in audio

Steganography comprises the mechanics of hiding data in a host media that may be publicly available. While previous works focused on unimodal setups (e.g., hiding images in images, or hiding audio in audio), PixInWav targets the multimodal case of hiding images in audio. To this end, we propose a novel residual architecture operating on top of short-time discrete cosine transform (STDCT) audio spectrograms. Among our results, we find that the residual steganography setup we propose allows an encoding of the hidden image that is independent from the host audio without compromising quality. Accordingly, while previous works require both host and hidden signals to hide a signal, PixInWav can encode images offline—which can be later hidden, in a residual fashion, into any audio signal.Work partially supported by the European Union through the Erasmus+ student mobility program, Science Foundation Ireland (SFI) under grant numbers SFI/15/SIRG/3283 and SFI/12/RC/2289 P2, and the Spanish Research Agency (AEI) under project PID2020117142GB-I00 of the call MCIN/ AEI /10.13039/501100011033.Peer ReviewedPostprint (author's final draft

Prolonged vs short-term infusion of β-lactam antibiotics for the treatment of febrile neutropenia: A systematic review and meta-analysis

Background: The optimisation of the use of beta-lactam antibiotics (BLA) via prolonged infusions in life-threatening complications such as febrile neutropenia (FN) is still controversial. This systematic review and meta-analysis aim to evaluate the efficacy of this strategy in onco-haematological patients with FN. Methods: A systematic search was performed of PubMed, Web of Science, Cochrane, EMBASE, World Health Organization, and ClinicalTrials.gov, from database inception until December 2022. The search included randomised controlled trials (RCTs) and observational studies that compared prolonged vs short-term infusions of the same BLA. The primary outcome was all-cause mortality. Secondary outcomes were defervescence, requirement of vasoactive drugs, length of hospital stay and adverse events. Pooled risk ratios were calculated using random effects models. Results: Five studies were included, comprising 691 episodes of FN, mainly in haematological patients. Prolonged infusion was not associated with a reduction in all-cause mortality (pRR 0.83; 95% confidence interval 0.47-1.48). Nor differences were found in secondary outcomes. Conclusions: The limited data available did not show significant differences in terms of all-cause mortality or significant secondary outcomes in patients with FN receiving BLA in prolonged vs. short-term infusion. High-quality RCTs are needed to determine whether there are subgroups of FN patients who would benefit from prolonged BLA infusion. (c) 2023 The Author(s). Published by Elsevier Ltd on behalf of The British Infection Association. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Characterization of the copper transporters from lotus spp. and their involvement under flooding conditions

Forage legumes are an important livestock nutritional resource, which includes essential metals, such as copper. Particularly, the high prevalence of hypocuprosis causes important economic losses to Argentinian cattle agrosystems. Copper deficiency in cattle is partially due to its low content in forage produced by natural grassland, and is exacerbated by flooding conditions. Previous results indicated that incorporation of Lotus spp. into natural grassland increases forage nutritional quality, including higher copper levels. However, the biological processes and molecular mechanisms involved in copper uptake by Lotus spp. remain poorly understood. Here, we identify four genes that encode putative members of the Lotus copper transporter family, denoted COPT in higher plants. A heterologous functional complementation assay of the Saccharomyces cerevisiae ctr1∆ctr3∆ strain, which lacks the corresponding yeast copper transporters, with the putative Lotus COPT proteins shows a partial rescue of the yeast phenotypes in restrictive media. Under partial submergence conditions, the copper content of L. japonicus plants decreases and the expression of two Lotus COPT genes is induced. These results strongly suggest that the Lotus COPT proteins identified in this work function in copper uptake. In addition, the fact that environmental conditions affect the expression of certain COPT genes supports their involvement in adaptive mechanisms and envisages putative biotechnological strategies to improve cattle copper nutrition.Fil: Escaray, Francisco José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); Argentina. Universidad de Valencia. Estructura de Investigación Interdisciplinar en Biotecnología y Biomedicina; EspañaFil: Antonelli, Cristian Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Copello, Guillermo Javier. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; ArgentinaFil: Puig, Sergi. Centro Superior de Investigaciones Científicas. Instituto de Agroquímica y Tecnología de los Alimentos; EspañaFil: Peñarrubia, Lola. Universidad de Valencia. Estructura de Investigación Interdisciplinar en Biotecnología y Biomedicina; EspañaFil: Ruiz, Oscar Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Perea García, Ana. Centro Superior de Investigaciones Científicas. Instituto de Agroquímica y Tecnología de los Alimentos; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); Argentin

Control-oriented thermal modeling methodology for water-cooled PEM fuel-cell-based systems

In this paper, a new control-oriented modeling methodology for the thermal dynamics of water-cooled Proton Exchange Membrane Fuel Cells (PEMFCs) is presented and validated. This methodology is not only useful for control applications, but also can be used for predicting the temperature variation across the stack, allowing to monitor its operation. The methodology has been validated in a real 600-W, 20-cells, water cooled PEMFC, with encouraging results for both the stationary and the transient states. Results show that the proposed methodology is accurate and suitable for control purposes.Peer ReviewedPostprint (author's final draft

The effect of titanium dioxide surface modification on the dispersion, morphology, and mechanical properties of recycled PP/PET/TiO2 PBNANOs

Titanium dioxide (TiO2) nanoparticles have recently appeared in PET waste because of the introduction of opaque PET bottles. We prepare polymer blend nanocomposites (PBNANOs) by adding hydrophilic (hphi), hydrophobic (hpho), and hydrophobically modified (hphoM) titanium dioxide (TiO2) nanoparticles to 80rPP/20rPET recycled blends. Contact angle measurements show that the degree of hydrophilicity of TiO2 decreases in the order hphi > hpho > hphoM. A reduction of rPET droplet size occurs with the addition of TiO2 nanoparticles. The hydrophilic/hydrophobic balance controls the nanoparticles location. Transmission electron microscopy (TEM_ shows that hphi TiO2 preferentially locates inside the PET droplets and hpho at both the interface and PP matrix. HphoM also locates within the PP matrix and at the interface, but large loadings (12%) can completely cover the surfaces of the droplets forming a physical barrier that avoids coalescence, leading to the formation of smaller droplets. A good correlation is found between the crystallization rate of PET (determined by DSC) and nanoparticles location, where hphi TiO2 induces the highest PET crystallization rate. PET lamellar morphology (revealed by TEM) is also dependent on particle location. The mechanical behavior improves in the elastic regime with TiO2 addition, but the plastic deformation of the material is limited and strongly depends on the type of TiO2 employed

Ciencia ciudadana contra prejuicios lingüísticos: el proyecto Milmots.eu

La ciència ciutadana és un bon mecanisme per a fer recerca en l’àmbit de la demolingüística, ja que proposa la participació i l’arreplegada de dades del gran públic al mateix temps que genera una cultura científica en la societat. El projecte Milmots és una eina interactiva que neix amb l’objectiu de difondre, de conèixer i de compartir el nostre lèxic, les nostres paraules, associades als nostres pobles i les nostres comarques. L’elevat volum de mots i locucions recollit ha proporcionat un material idoni per a realitzar un estudi sociolingüístic que posa de manifest que les variables socials d’edat, àrea dialectal, nombre d’habitants de la població tenen una influència significativa sobre la normativitat de les tries lèxiques dels participantsCitizen science is a useful mechanism for research in the field of demolinguistics, since it proposes collecting data from the general public while promoting a scientific-minded culture in society. The Milmots project is an interactive webtool that aims to spread and share Catalan vocabulary, as well as associating it with the towns and counties in which the vocabulary is used. The high volume of words and phrases collected has proved to be an ideal material for carrying out a sociolinguistic study that shows that the social variables of age, dialect area and population size have a significant influence on the normativity of participant’s lexical choices.La ciencia ciudadana es un buen mecanismo para investigar en el ámbito de la demolingüística, ya que propone la participación y la recogida de datos del gran público, al mismo tiempo que genera una cultura científica en la sociedad. El proyecto Milmots es una herramienta interactiva que nace con el objetivo de difundir, de conocer y de compartir nuestro léxico, nuestras palabras, asociadas a nuestros pueblos y a nuestras comarcas. El elevado volumen de palabras y locuciones recogidas ha proporcionado un material idóneo para llevar a cabo un estudio sociolingüístico que pone de manifiesto la influencia significativa que tienen variables sociales como la edad, el área dialectal, el número de habitantes de la población, en la normatividad del léxico escogido por los participantes.