Codificación perceptual de audio simple para dispositivos de bajo costo

En este documento se propone un nuevo esquema de codificación perceptual de audio basado en técnicas adaptativas. Estos métodos de análisis de señales se basan en la información contenida en dichas técnicas. Aquí se utilizan las siguientes herramientas: 1) descomposición empírica de modos (EMD) y 2) descomposición empírica de modos por conjuntos (EEMD). En comparación con técnicas previas, el esquema de codificación propuesto es simple, ya que descompone la señal de entrada en términos de sus componentes físicamente relevantes, extrae sus extremos locales y posteriormente realiza la codificación Golomb-Rice de los mismos. Se estudia el rendimiento de esta metodología en términos de factor de compresión y calidad perceptual para varias pistas de audio contenidas en el CD SQAM de la Unión Europea de Radiodifusión (EBU). Estos resultados son comparados con los obtenidos utilizando otros codificadores perceptuales de audio.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Codificación perceptual de audio simple para dispositivos de bajo costo

En este documento se propone un nuevo esquema de codificación perceptual de audio basado en técnicas adaptativas. Estos métodos de análisis de señales se basan en la información contenida en dichas técnicas. Aquí se utilizan las siguientes herramientas: 1) descomposición empírica de modos (EMD) y 2) descomposición empírica de modos por conjuntos (EEMD). En comparación con técnicas previas, el esquema de codificación propuesto es simple, ya que descompone la señal de entrada en términos de sus componentes físicamente relevantes, extrae sus extremos locales y posteriormente realiza la codificación Golomb-Rice de los mismos. Se estudia el rendimiento de esta metodología en términos de factor de compresión y calidad perceptual para varias pistas de audio contenidas en el CD SQAM de la Unión Europea de Radiodifusión (EBU). Estos resultados son comparados con los obtenidos utilizando otros codificadores perceptuales de audio.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Codificación perceptual de audio simple para dispositivos de bajo costo

En este documento se propone un nuevo esquema de codificación perceptual de audio basado en técnicas adaptativas. Estos métodos de análisis de señales se basan en la información contenida en dichas técnicas. Aquí se utilizan las siguientes herramientas: 1) descomposición empírica de modos (EMD) y 2) descomposición empírica de modos por conjuntos (EEMD). En comparación con técnicas previas, el esquema de codificación propuesto es simple, ya que descompone la señal de entrada en términos de sus componentes físicamente relevantes, extrae sus extremos locales y posteriormente realiza la codificación Golomb-Rice de los mismos. Se estudia el rendimiento de esta metodología en términos de factor de compresión y calidad perceptual para varias pistas de audio contenidas en el CD SQAM de la Unión Europea de Radiodifusión (EBU). Estos resultados son comparados con los obtenidos utilizando otros codificadores perceptuales de audio.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Seudoartrosis después de una osteotomía en chevron: incidencia, tratamiento, seguimiento y evolución

Introducción: El hallux valgus es el trastorno más común del primer dedo del pie. Provoca dolor, discapacidad funcional y altera los patrones de la marcha. Las deformidades leves o moderadas se han corregido con osteotomías distales del primer metatarsiano, como la osteotomía en chevron, un procedimiento seguro, pero no exento de complicaciones. Los objetivos de este estudio fueron determinar la incidencia de seudoartrosis por dicha osteotomía y comunicar nuestro método terapéutico, el seguimiento y la evolución. Materiales y Métodos: Se realizó un estudio multicéntrico, retrospectivo que incluyó a pacientes operados entre 2009 y 2018. Se evaluaron 1156 osteotomías en chevron como tratamiento del hallux valgus leve o moderado en 1017 pacientes (rango etario 16-83 años; promedio 57.5) realizadas por 4 cirujanos experimentados. El criterio de inclusión fue que el paciente contara con estudios por imágenes compatibles con seudoartrosis a los 6 meses de la cirugía. Resultados: Se evaluó a 5 pacientes con diagnóstico de seudoartrosis después de una osteotomía en chevron para tratar el hallux valgus. Los puntajes promedio de la AOFAS fueron 51 antes del tratamiento del hallux valgus y 87,8 después del tratamiento de la seudoartrosis. Conclusiones: La incidencia de seudoartrosis fue del 0,4% en el posoperatorio alejado. Nuestro abordaje y el tratamiento de la seudoartrosis lograron una excelente mejoría clínica y funcional en todos los pacientes operados

Atmospheric deposition of inorganic nitrogen in Spanish holm oak forests measured with ion-exchange resins and conventional collectors

Atmospheric nitrogen deposition is one of the main threats for biodiversity and ecosystem functioning. Measurement techniques like ion-exchange resin collectors (IECs), which are less expensive and timeconsuming than conventional methods, are gaining relevance in the study of atmospheric deposition and are recommended to expand monitoring networks. In the present work, bulk and throughfall deposition of inorganic nitrogen were monitored in three different holm oak forests in Spain during two years. The results obtained with IECs were contrasted with a conventional technique using bottle collectors and with a literature review of similar studies. The performance of IECs in comparison with the conventional method was good for measuring bulk deposition of nitrate and acceptable for ammonium and total dissolved inorganic nitrogen. Mean annual bulk deposition of inorganic nitrogen ranged 3.09 e5.43 kg N ha1 according to IEC methodology, and 2.42e6.83 kg N ha1 y1 using the conventional method. Intra-annual variability of the net throughfall deposition of nitrogen measured with the conventional method revealed the existence of input pulses of nitrogen into the forest soil after dry periods, presumably originated from the washing of dry deposition accumulated in the canopy. Important methodological recommendations on the IEC method and discussed, compiled and summarized

Atmospheric pollutants in peri-urban forests of Quercus ilex : evidence of pollution abatement and threats for vegetation

Peri-urban vegetation is generally accepted as a significant remover of atmospheric pollutants, but it could also be threatened by these compounds, with origin in both urban and non-urban areas. To characterize the seasonal and geographical variation of pollutant concentrations and to improve the empirical understanding of the influence of Mediterranean broadleaf evergreen forests on air quality, four forests of Quercus ilex (three peri-urban and one remote) were monitored in different areas in Spain. Concentrations of nitrogen dioxide (NO₂), ammonia (NH₃), nitric acid (HNO₃) and ozone (O₃) were measured during 2 years in open areas and inside the forests and aerosols (PM₁₀) were monitored in open areas during 1 year. Ozone was the only air pollutant expected to have direct phytotoxic effects on vegetation according to current thresholds for the protection of vegetation. The concentrations of N compounds were not high enough to directly affect vegetation but could be contributing through atmospheric N deposition to the eutrophization of these ecosystems. Peri-urban forests of Q. ilex showed a significant below-canopy reduction of gaseous concentrations (particularly NH₃, with a mean reduction of 29-38 %), which indicated the feasibility of these forests to provide an ecosystem service of air quality improvement. Well-designed monitoring programs are needed to further investigate air quality improvement by peri-urban ecosystems while assessing the threat that air pollution can pose to vegetation

Differential presentation of hypersensitivity reactions to carboplatin and oxaliplatin: Phenotypes, endotypes, and management with desensitization

Background: Drug hypersensitivity reactions (DHRs) to platinum-based drugs are heterogenous and restrict their access, and drug desensitization (DD) has provided a ground-breaking procedure for their re-introduction, although the response is heterogeneous. We aimed to identify the phenotypes, endotypes, and biomarkers of reactions to carboplatin and oxaliplatin and their response to DD. Methods: Seventy-nine patients presenting with DHRs to oxaliplatin (N = 46) and carboplatin (N = 33) were evaluated at the Allergy Departments of two tertiary care hospitals in Spain. Patient symptoms, skin testing, biomarkers, and outcomes of 267 DDs were retrospectively analyzed. Results: Oxaliplatin-reactive patients presented with type I (74%), cytokine release reaction (CRR) (11%), and mixed (Mx) (15%) phenotypes. In contrast, carboplatin reactive patients presented with predominantly type I (85%) and Mx (15%) but no CRRs. Out of 267 DDs, breakthrough reactions (BTRs) to oxaliplatin occurred twice as frequently as carboplatin (32% vs. 15%; p < .05). Phenotype switching from type I to another phenotype was observed in 46% of oxaliplatin DDs compared to 21% of carboplatin DDs. Tryptase was elevated in type I and Mx reactions, and IL-6 in CRR and Mx, indicating different mechanisms and endotypes. Conclusion: Carboplatin and oxaliplatin induced three different types of reactions with defined phenotypes and endotypes amendable to DD. Although most of the initial reactions for both were type I, oxaliplatin presented with unique CRR reactions. During DD, carboplatin reactive patients presented mostly type I BTR, while oxaliplatin-reactive patients frequently switched from type I to CRR, providing a critical difference and the need for personalized DD protocols

HESML: A scalable ontology-based semantic similarity measures library with a set of reproducible experiments and a replication dataset

This work is a detailed companion reproducibility paper of the methods and experiments proposed by Lastra-Díaz and García-Serrano in (2015, 2016) [56–58], which introduces the following contributions: (1) a new and efficient representation model for taxonomies, called PosetHERep, which is an adaptation of the half-edge data structure commonly used to represent discrete manifolds and planar graphs; (2) a new Java software library called the Half-Edge Semantic Measures Library (HESML) based on PosetHERep, which implements most ontology-based semantic similarity measures and Information Content (IC) models reported in the literature; (3) a set of reproducible experiments on word similarity based on HESML and ReproZip with the aim of exactly reproducing the experimental surveys in the three aforementioned works; (4) a replication framework and dataset, called WNSimRep v1, whose aim is to assist the exact replication of most methods reported in the literature; and finally, (5) a set of scalability and performance benchmarks for semantic measures libraries. PosetHERep and HESML are motivated by several drawbacks in the current semantic measures libraries, especially the performance and scalability, as well as the evaluation of new methods and the replication of most previous methods. The reproducible experiments introduced herein are encouraged by the lack of a set of large, self-contained and easily reproducible experiments with the aim of replicating and confirming previously reported results. Likewise, the WNSimRep v1 dataset is motivated by the discovery of several contradictory results and difficulties in reproducing previously reported methods and experiments. PosetHERep proposes a memory-efficient representation for taxonomies which linearly scales with the size of the taxonomy and provides an efficient implementation of most taxonomy-based algorithms used by the semantic measures and IC models, whilst HESML provides an open framework to aid research into the area by providing a simpler and more efficient software architecture than the current software libraries. Finally, we prove the outperformance of HESML on the state-of-the-art libraries, as well as the possibility of significantly improving their performance and scalability without caching using PosetHERep

Artificial Intelligence to evaluate the impact of COVID-19 disease on the elderly

Resumen del trabajo presentado a las II Jornadas Científicas PTI+ Salud Global, celebradas en Valencia del 5 al 6 de octubre de 2022.Peer reviewe

The gut microbiota, a hallmark of human aging, could implicate risk and effect of COVID19 in the elderly

Resumen del trabajo presentado a las II Jornadas Científicas PTI+ Salud Global, celebradas en Valencia del 5 al 6 de octubre de 2022.Peer reviewe