Search

Internet of Things (IoT) devices are increasingly pervasive and essential components in enabling new applications and services. However, their widespread use also exposes them to exploitable vulnerabilities and flaws that can lead to significant losses. In this context, ensuring robust cybersecurity measures is essential to protect IoT devices from malicious attacks. However, the current solutions that provide flexible policy specifications and higher security levels for IoT devices are scarce. To address this gap, we introduce T800, a low-resource packet filter that utilizes machine learning (ML) algorithms to classify packets in IoT devices. We present a detailed performance benchmarking framework and demonstrate T800's effectiveness on the ESP32 system-on-chip microcontroller and ESP-IDF framework. Our evaluation shows that T800 is an efficient solution that increases device computational capacity by excluding unsolicited malicious traffic from the processing pipeline. Additionally, T800 is adaptable to different systems and provides a well-documented performance evaluation strategy for security ML-based mechanisms on ESP32-based IoT systems. Our research contributes to improving the cybersecurity of resource-constrained IoT devices and provides a scalable, efficient solution that can be used to enhance the security of IoT systems., Comment: 11 pages, under review

Solutions based exclusively on technology are unlikely to fully deliver a transition towards a low-carbon society. Shifts in consumption patterns and lifestyles associated with technological solutions are essential to achieve safe GHG concentration levels. Considering households' consumption patterns, residential electricity consumption represents a major issue, as it is closely related to lifestyle choices and living standards. In this context, this paper discusses how specific electricity requirements may vary across different deciles of living standard in Brazil and France. The present evaluation is based on specific electricity consumption and its corresponding carbon dioxide emissions for different home appliances used for food conservation, lighting, daily chores (e.g. cloth washing), as well as information and leisure. Results ratify, on the one hand, the significant income gap existing between French and Brazilian households. On the other hand, they show that differences regarding specific electricity requirements in the two countries are lower than intuitively expected. Hence, they evidence a converging trend in electricity requirements between the two countries, especially among higher income deciles., QC 20181008

[FR]L’état écologique et la fonctionnalité des cours d’eau du bassin de l’Èbre ont subi une détérioration remarquable au cours des dernières décennies, à cause du changement global et des pressions anthropiques directes. Face à cette problématique les initiatives de restauration sont encore peu abondantes, locales et très dispersées dans le territoire. Dans le contexte espagnol, le bassin de l’Èbre n’est pas moteur dans le développement de la restauration fluviale. L’administration hydrologique a préféré fondamentalement la récupération de zones humides. Cependant, des bases consolidées existent pour pouvoir développer une restauration fluviale dans l’avenir : des paradigmes théoriques associés aux groupes de travail, la mise en pratique de quelques actions comme exemples de démonstration et la possibilité de travailler de façon intégrée avec la conservation (des réserves naturelles fluviales) et la gestion d’inondations (l’espace de mobilité ou territoire fluvial)., [ES]El estado ecológico y la funcionalidad de los cursos fluviales de la cuenca del Ebro han sufrido un deterioro notable en las últimas décadas a causa del cambio global y presiones antrópicas directas. Frente a esta problemática las iniciativas de restauración son todavía escasas, locales y muy dispersas en el territorio. La restauración fluvial de la cuenca del Ebro no puede considerarse relevante en el contexto estatal, ya que la administración hidrológica ha optado fundamentalmente por la recuperación de humedales. No obstante, existen bases consolidadas para poder desarrollar restauración fluvial en el futuro: paradigmas teóricos asociados a grupos de trabajo, restauraciones de ámbito local que sirven de ejemplo de buenas prácticas y la posibilidad de trabajar de forma integrada con la conservación (Reservas Naturales Fluviales) y con la gestión de inundaciones (Territorio Fluvial)., [EN]The ecological condition and functionality of the Ebro basin’s rivers have suffered a notable deterioration in the last decades, because of the global change and anthropic pressures. Opposite to this problem, the initiatives of restoration are still scanty, local and very dispersed in the territory. Ebro basin does not stand out at present for river restoration in the Spanish context. The hydrological administration has been employed fundamentally at wetlands recovery. Nevertheless, bases consolidated exist to be able to develop fluvial restoration in the future: theoretical paradigms associated with workgroups, the putting in practice of some local actions with the role of examples of demonstration, and the possibility of integrated working with conservation (natural fluvial reserves) and flood management (room for the river or fluvial territory).

Background: New echocardiographic techniques have renewed the interest in the assessment of right ventricular function; however, there are still not clearly defined reference values or large-scale analyses on the behavior of this chamber when submitted to pressure (RVPO) or volume (RVVO) overload. Objective: The aim of this study was to analyze echocardiographic abnormalities and right ventricular longitudinal and transverse strain in patients with RVPO and RVVO and in healthy subjects (CTRL). Methods: Fifty CTRL subjects (mean age 47±18 years, 31 females), 50 RVPO patients (mean age 48±12 years, 32 females) and 30 RVVO patients (mean age 43±14 years, 19 females) were included in the study. Left ventricular, left atrial, right ventricular and right atrial dimensions, and left and right ventricular function were analyzed. Two-dimensional left and right ventricular longitudinal strain and right ventricular transverse strain were evaluated. Analysis of variance was used to compare means and standard deviations. Results: Demographic data, left ventricular ejection fraction and adjusted left atrial volume showed no significant differences among groups. Diameters, right ventricular wall thickness, tricuspid regurgitation gradient and adjusted right atrial volume were higher in RVPO patients. Right ventricular function parameters were decreased in RVPO and normal in RVVO patients. The right ventricular lateral transverse strain was increased both in RVPO and RVVO. Conclusions: Right ventricular echocardiographic parameters and strain showed signs of remodeling, both in RVPO and RVVO, and decreased systolic function in RVPO. Increased right ventricular transverse strain would probably be due to remodeling, and decreased longitudinal strain to systolic dysfunction. Decreased left ventricular longitudinal strain may indicate early biventricular dysfunction., Se analiza la función del ventrículo derecho (VD) en pacientes con sobrecarga presórica (SPVD) y volumétrica (SVVD). Objetivo: Analizar alteraciones ecocardiográficas y strain longitudinal y transversal del VD en pacientes SPVD, SVVD y en individuos saludables (CTRL). Material y métodos: Cincuenta CTRL (edad 47±18 años, 31 femeninos); cincuenta pacientes con SPVD, (edad 48±12 años, 32 femeninos) y treinta pacientes con SVVD (edad 43±14 años, 19 femeninos). Analizadas las dimensiones del ventrículo izquierdo (VI), aurícula izquierda (AI), VD y aurícula derecha (AD), función del VI y VD, strain bidimensional longitudinal del VI y VD y transversal del VD. Las medias y desviación standard fueron comparadas por el análisis de variancia, con significancia de p<0,05. Resultados: Los datos demográficos no mostraron diferencias significativas entre los grupos, así como la fracción de eyección del VI y el volumen indexado de la AI. En la SPVD los diámetros, espesor de la pared del VD, gradiente tricúspide y volumen indexado de la AD fueron mayores. Los parámetros de función del VD estaban disminuidos en la SPVD y normales en la SVVD. El strain transversal lateral del VD aumentado en la SPVD y SVVD. Conclusión: Los parámetros ecocardiograficos y el strain del VD mostraron señales de remodelación en la SPVD y SVVD y disminución de la función sistólica en la SPVD. El aumento del strain transversal del VD se debería a la remodelación y la disminución del strain longitudinal a la disfunción sistólica. La disminución del strain longitudinal del VI puede indicar precozmente la disfunción biventricular. Palabras clave: Ecocardiografia, strain bidimensional, hipertensión pulmonar

La economía del futuro está entre nosotros. Avances tecnológicos que hasta hace poco parecían objetos sacados de películas de ciencia ficción se usan hoy en la agricultura, en la industria y en los servicios, y están transformando el mundo tal y como lo conocemos. ¿Qué hacer en este escenario? ¿Está Latinoamérica preparada para enfrentar este paradigma de la producción y el comercio? El número especial de la Revista Integración & Comercio, que conmemora el 50 aniversario del INTAL, ofrece algunas respuestas a este interrogante para aprovechar al máximo la próxima era tecnológica en la búsqueda de respuestas útiles para mejorar vidas.

Contains fulltext : 149301.pdf (publisher's version ) (Open Access)

In a previous work, we presented a new method to account for the Gribov ambiguities in non-Abelian gauge theories. The method consists on the introduction of an extra constraint which directly eliminates the infinitesimal Gribov copies without the usual geometric approach. Such strategy allows to treat gauges with non-hermitian Faddeev-Popov operator. In this work, we apply this method to a gauge which interpolates among the Landau and maximal Abelian gauges. The result is a local and power counting renormalizable action, free of infinitesimal Gribov copies. Moreover, the interpolating tree-level gluon propagator is derived., Comment: Several changes: figures removed, typos corrected and discussions included. 24 pages, to appear in EPJC

Temporomandibular disorders (TMD) can be defined as a set of painful and/or dysfunctional conditions, involving the masticatory muscles and/or the temporomandibular joint (TMJ). They commonly affect women during the reproductive years and its prevalence drastically decreases as result from ageing. Due to the complex multifactorial nature of TMD, it is essential the broad interdisciplinary research, basic and clinical, that supports developing evidence-based strategies being able to prevent, diagnose and manage these chronic conditions in a more effective and safe way., Los trastornos temporomandibulares (TTM) se pueden definir como un conjunto de condiciones dolorosas y/o disfuncionales en los músculos masticatorios y/o en la articulación temporomandibular (ATM). Comúnmente afectan a las mujeres durante los años reproductivos y su prevalencia disminuye bruscamente con la edad. Debido a la compleja naturaleza multifactorial de los TTM, es fundamental la investigación interdisciplinar amplia, básica y clínica que permita el desarrollo de estrategias basadas en evidencias capaces de prevenir, diagnosticar y tratar estos trastornos crónicos de manera más eficaz y segura.

Massive Multiple-input Multiple-output (MIMO) systems offer exciting opportunities due to their high spectral efficiencies capabilities. On the other hand, one major issue in these scenarios is the high-complexity detectors of such systems. In this work, we present a low-complexity, near maximum-likelihood (ML) performance achieving detector for the uplink in large MIMO systems with tens to hundreds of antennas at the base station (BS) and similar number of uplink users. The proposed algorithm is derived from the likelihood-ascent search (LAS) algorithm and it is shown to achieve near ML performance as well as to possess excellent complexity attribute. The presented algorithm, termed as random-list based LAS (RLB-LAS), employs several iterative LAS search procedures whose starting-points are in a list generated by random changes in the matched filter detected vector and chooses the best LAS result. Also, a stop criterion was proposed in order to maintain the algorithm's complexity at low levels. Near-ML performance detection is demonstrated by means of Monte Carlo simulations and it is shown that this performance is achieved with complexity of just O(K^2) per symbol, where K denotes the number of single-antenna uplink users., Comment: 6 pages, 6 figures, 1 table. Corrected typos; Replaced references [17-18] concerning SIC and MB-SIC detection

An alternative method to account for the Gribov ambiguities in gauge theories is presented. It is shown that, to eliminate Gribov ambiguities, at infinitesimal level, it is required to break the BRST symmetry in a soft manner. This can be done by introducing a suitable extra constraint that eliminates the infinitesimal Gribov copies. It is shown that the present approach is consistent with the well established known cases in the literature, i.e., the Landau and maximal Abelian gauges. The method is valid for gauges depending exclusively on the gauge field and is restricted to classical level. However, occasionally, we deal with quantum aspects of the technique, which are used to improve the results., Comment: 29 pp. No figures. Discussions added. Final version to appear in EPJC

From pure Yang-Mills action for the $SL(5,\mathbb{R})$ group in four Euclidean dimensions we obtain a gravity theory in the first order formalism. Besides the Einstein-Hilbert term, the effective gravity has a cosmological constant term, a curvature squared term, a torsion squared term and a matter sector. To obtain such geometrodynamical theory, asymptotic freedom and the Gribov parameter (soft BRST symmetry breaking) are crucial. Particularly, Newton and cosmological constant are related to these parameters and they also run as functions of the energy scale. One-loop computations are performed and the results are interpreted., Comment: 19 pp. 3 figures. Title changed. Text with several changes. Latest version accepted in the IJMPD

This paper presents a study on knowledge management and analysis of scientific Biotechnology trends in Venezuela, providing an overview of the science profile as well as regional development and its relation to issues of topics covered by Biotechnology based on the analysis of scientific publications for the period of 1995 to 2010. The survey was accomplished in database ISI/Web of Science using 60 terms selected by experts in Biotechnology and 803 register has been organized. Scientific indicators were produced using data/ text mining tools. It was possible to find a greater number of scientific publications in areas such as Ecology and Health, showing a greater frequency in these terms: DNA, PCR and Biodiversity. Results pointed out The United States of America as the main foreign partner-country of scientific publications followed by Spain and France. It was possible to verify cooperation network with others Latin American countries: Brazil, Colombia and Chile.

The aim of this paper was to select the most interesting Brazilian biopharmaceuticals, with the best market opportunity for production. The biopharmaceuticals filgrastim, infliximab, somatropin, imiglucerase, betainterferon and factor VIII were selected because they are not produced in Brazil and thus could increase the technological capacity of domestic production. The use of a data mining tool facilitated the results achieved here, using the patents deposited in several banks worldwide as the source information. The prospects and trends of producing biopharmaceuticals in Brazil are of great interest to the country to establish a competitive industry and reduce the vulnerability of the National Health System, such as display windows of opportunity, showing the possibility of moving towards the production of biopharmaceuticals.

This paper presents a study on knowledge management and the analysis of scientific biotechnology trends in Venezuela. It provides an overview of the science profile as well as its regional development and its relation to issues of topics covered by biotechnology, based on the analysis of scientific publications for the period 1995-2010. The survey was accomplished through the database ISI Web of Science, using 60 terms selected by experts in biotechnology. A set of 803 registers has been organized. Scientific indicators were produced using data/text mining tools in order to perform an analysis of knowledge management and scientific trends. This made possible the finding of a greater number of scientific publications in areas such as Ecology and Health, showing a greater frequency in terms competence (such as DNA, PCR and Biodiversity). Results pointed out that the United States is the main foreign partner-country of scientific publications, followed by Spain and France. A cooperation network with other Latin American countries (Brazil, Colombia and Chile) was also verified. Results showed that scientific knowledge is being developed by certain public institutions such as universities and government research centers, especially the Universidad Central de Venezuela and the Instituto Venezolano de Investigaciones Científicas, Este artigo apresenta um estudo da gestão do conhecimento e análise de tendências científicas em biotecnologia na Venezuela, provendo uma visão do perfil de desenvolvimento regional científico e em relação aos temas que englobam as áreas abrangidas pela biotecnologia, ambos baseados na análise de publicações científicas do país no período de 1995 a 2010. A pesquisa foi realizada na base de dados ISI Web of Science utilizando 60 termos selecionados por especialistas em biotecnologia. Um conjunto de 803 registros foi organizado e indicadores científicos foram produzidos através da utilização de ferramentas de mineração de dados/textos e uma análise da gestão do conhecimento e tendências científicas foi realizada. Foi possível observar número maior de publicações nas áreas: Ecologia e Ciências da Vida, com maior freqüência de termos em competência PCR, DNA e Biodiversidade. Os resultados apontam os Estados Unidos como principal país parceiro externo nas publicações científicas, seguido da Espanha e da França. Também foi possível verificar grande rede de cooperações com outros países latino-americanos como Brasil, Colômbia e Chile. Constatou-se que o conhecimento científico em biotecnologia na Venezuela é desenvolvido por instituições públicas: universidades e centros de pesquisas governamentais, destacando-se: Universidad Central de Venezuela e Instituto Venezolano de Investigaciones Científicas.

We present a hypothesis to explain how the brain operates to generate different degrees of consciousness. We relate our model to recent evidence from brain morphology and physiology, indicating that the central nervous system contains two parallel networks (neuronal and astroglial) establishing positive and negative feedback loops. Variable levels of consciousness are proposed to depend on the degree of resonance between these networks. The resonance can occur in the absence of salient external stimulation and, even when such stimulation occurs, the response of the coupled networks is always dependent on the previous state of their interaction domain. We also explain complex processes occurring below the threshold of awareness as those that deploy the brain’s computational resources, although without producing resonant states of sufficient magnitude to determine the individual´s overt acknowledgment. Finally, our model affords a plausible account of phenomenal and self-consciousness which, by resting at the outskirts of reportable cognitive activity, traditionally compound the 'hard problem' of consciousness.

Neste trabalho, estudamos a formação de memória declarativa de curto prazo em condições que correspondem a processos de somação temporal e espacial. Apresentamos para alunos universitários uma sequência de slides, com duração de sete segundos cada, contendo sentenças (uma por slide) que poderiam ser de maior ou menor interesse para os sujeitos. Ao todo foram apresentadas 25 sentenças, das quais cinco repetidas três vezes e as 10 restantes apresentadas apenas uma vez, intercaladas aleatoriamente. Após a apresentação, os sujeitos responderam a questões referentes a cada sentença. Verificamos que as sentenças apresentadas três vezes apresentaram, em média, maior número de respostas corretas, indicando uma eficácia da estratégia de aprendizagem baseada na somação temporal. Contudo, também verificamos que a sentença mais lembrada foi apresentada apenas uma vez, e que outras seis sentenças apresentadas apenas uma vez obtiveram maior número de respostas corretas que a média das sentenças apresentadas três vezes, o que indica a possibilidade de maior eficiência das estratégias de somação espacial.Palavras-chave: Memória; Aprendizagem; Somação temporal; Somação espacial; Repetição; Relevância.

The purpose of this autopsy study was to test the hypotheses that temporomandibular joint (TMJ) arthrosis is more common in women than in men, increases with age, and is more common in edentulous persons than in those with natural teeth. Two hundred forty-eight TMJs removed at autopsy from 224 fresh cadavers were investigated macroscopically with dissection or cryosectioning. Age was found to be a significant factor in prediction of TMJ arthrosis (p p p p <0.001) between arthrosis, disk displacement, disk deformation, and disk perforation. There were no statistically significant differences in the prevalence of morphologic changes in the joints from persons with 10 or more natural teeth in each jaw compared with those from persons without natural teeth. The results of this study showed that TMJ arthrosis is more frequent in older than in younger persons. TMJ disk displacement generally appears necessary for the development of perforations. The findings of this study indicate that sex and dentition are not major factors for the development of TMJ pathosis in elderly individuals.

Editors: Aug. 1859-July 1865, J. D. White, J. H. McQuillen, G. J. Ziegler.--Aug. 1865-Dec. 1871, J. H. McQuillen, G. J. Ziegler.--Jan. 1872-May 1891, J. W. White.--July 1891-Apr. 1930, E. C. Kirk (with L. P. Anthony, Dec. 1917-Apr. 1930).--May 1930-Dec. 1936, L. P. Anthony., Vols. 1-13 are called "new series.", Merged in Jan. 1937 with: Journal of the American Dental Association, ISSN 1048-6364, to form: Journal of the American Dental Association and dental cosmos, ISSN 0375-8451., The Dental cosmos; a monthly record of dental science. [Vol. 69] : Vol 69 : Issue 6, Page(s) 653, (dlps) volume: 0527912.0069.001, (dlps) article: 0527912.0069.001:469, http://quod.lib.umich.edu/t/text/accesspolicy.html