Pechmann, Alexander. La biblioteca de los libros perdidos

Reseña del libro de Pechmann, Alexander La biblioteca de los libros perdidos

Una propuesta de enseñanza del participio atributivo y circunstancial griego desde la perspectiva de la sintaxis estructural-funcional

Os particípios pertencem ao conjunto das formas nominais do verbo grego, que também inclui infinitivos e adjetivos verbais. Essas formas caracterizam-se por constituir uma categoria intermediária entre o substantivo e o verbo tanto por sua morfologia quanto por sua sintaxe, que difere de algumas línguas modernas, o que muitas vezes dificulta o ensino e a aprendizagem. A partir de uma perspectiva estrutural-funcional, apresentaremos uma proposta que acreditamos poder facilitar o ensino e aprendizagem do particípio grego atributivo e circunstancial ao mostrar sua equivalência com outras estruturas pertencentes à mesma classe de preenchimento de diferentes funções sintáticas. Para isso, faremos um apanhado de nosso referencial teórico, explicaremos como os particípios atributivos e circunstanciais são concebidos a partir dessa perspectiva, apresentaremos exemplos de autores clássicos e, a título de conclusão, apontaremos algumas diretrizes para o seu ensino

Technocratic Attitudes in COVID-19 Times: Change and Preference Over Types of Experts

Western publics show a sizable support for experts’ involvement in political decision making, that is, technocratic attitudes. This article analyzes two key aspects of these attitudes: technocratic attitudes’ stability and the heterogeneity in the demand for experts depending on the context. We first analyze how technocratic attitudes have been affected by an external event, the COVID-19 pandemic, that has placed experts’ role at the forefront of the public debate; this allows us to analyze the stability or change in these attitudes. Second, given that the pandemic quickly evolved from being a public health issue to becoming a political issue combining economic and public health dimensions, we examine whether framing the COVID-19 pandemic exclusively as a public health problem or as including a prominent economic dimension as well affects the type of public officials who are preferred to lead the political management of the crisis (independent experts with diverse professional skills or party politicians belonging to different parties and with a specialization in different policy fields). We pursue these two research goals through a panel survey conducted in Spain at two different time points, one before and another during the pandemic, in which we measure technocratic attitudes using an exhaustive battery; and through a survey experiment combining a conjoint design and a framing experiment. Results show that, first, technocratic attitudes have significantly increased as a consequence of the coronavirus outbreak; second, people’s preference for experts prevails against any other experimental treatment such as party affiliation; and, finally, preferences for the type of experts vary depending on the problem to be solved. In this way, this paper significantly increases our knowledge of the factors that affect variation in public attitudes towards experts’ involvement in political decision-making.This research was supported by a grant from the Spanish Ministry of Economy, Industry and Competitiveness Program. Grant number: CSO2017-89847-P. Luis Ramiro benefited from a grant by the Fondation Maison des Sciences de l'Homme (France), Programme Directeurs d'Etudes Associés DEA 2020

Sunflower Leaf Senescence: A Complex Genetic Process with Economic Impact on Crop Production

Leaf senescence is a complex process controlled by multiple genetic and environmental variables. In different crops, a delay in leaf senescence has an important impact on grain yield trough the maintenance of the photosynthetic leaf area during the reproductive stage. In sunflower (Helianthus annuus L.), the fourth largest oil crop worldwide, senescence reduces the capacity of plants to maintain their green leaf area for longer periods, especially during the grain filling phase, leading to important economic losses

Can exotic tree plantations preserve the bird community of an endangered native forest in the Argentine pampas?

Worldwide, the areas covered by native forests are declining while those of tree plantations are increasing. This has raised the question of whether tree plantations are able to preserve native forest species. In Argentina, the main native forests of the Pampas region, called talares, are endangered and their disappearance is imminent. Although exotic tree plantations are increasing in this region, their role in maintaining native bird diversity has not been studied in Argentine Pampas. We compared the bird community attributes and vegetation structure of talares native forests with those of tree plantations. Compared with talares native forests, plantations exhibited markedly lower bird richness (up to 80% lower), and all forest-dependent bird species were absent in plantations. Talares and plantations differed also in some aspects of vegetation structure, which usually are key determinants of bird abundance. Given the extreme importance of talares for forest birds, this bird community will be deeply affected if talares native forests continue to decline, as nearby plantations do not offer suitable habitat. To maintain the bird diversity of talares, and probably the diversity of other unstudied taxa related to them, we recommend management actions that should be applied urgently in these endangered forests of the Argentine Pampas.Fil: Lacoretz, Mariela Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Depalma, Daniela María. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; ArgentinaFil: Torrella, Sebastián Andrés. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Zilli, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Ferretti, Valentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; ArgentinaFil: Fernandez, Gustavo Javier. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma | Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma.; Argentin

Ensamble de un adaptador inalámbrico para el desarrollo del software sniffer en una red LoRaWAN y análisis con Wireshark

El presente trabajo tiene como objetivo el conseguir ensamblar un adaptador inalámbrico con Heltec Lora32 versión 2, lo cual que permitirá el desarrollo de un adaptador Sniffer para capturar de forma correcta paquetes de una red LoRaWAN construida e implementada para un posterior análisis del tráfico de paquetes con Wireshark. También, demostrar la cantidad de información o tramas que transita por la red Inalámbrica LoRaWAN que se detalla una frecuencia específica para trabajar de forma continua, es el punto de un extenso mar de preguntas, una de ellas es que información y que tan segura avanza por una red y a que destino intenta llegar. La información final no es algo exacto en la red hasta que llegue a su estación final debido a que su frecuencia debe ser bien configurada. Se presenta un adaptador capaz de interactuar con la red LoRaWAN y en colaboración con la tecnología IoT y aplicaciones web involucradas, verificar la seguridad al momento de que usuarios intenten comunicarse por una red. Finalmente entregar un reporte para un conocimiento más a fondo y facilidad al trabajar con la ciencia de las redes. Se explicará el desarrollo de esta idea tanto en la forma práctica y teórica, como diseñar el adaptador con respectivas pruebas y para una forma más entendible identificar los factores que hagan esto posible por medio de una investigación en las áreas de interés para la realización de este proyecto.The objective of this work is to assemble a wireless adapter with Heltec Lora32 version 2 that will allow us to develop a Sniffer software to correctly capture packets from a LoRaWAN network and later analyze the traffic with Wireshark. Demonstrating the amount of information that passes through a single network is the point of an extensive sea of questions, one of them is what information and how safely it travels through a network and to what destination it tries to reach. We don’t see information as accurate on the network until it reaches its end station. An assembler capable of interacting with the network and in collaboration with IoT y and web applications, verifying security when users try to communicate over a network is presented. Finally deliver a report for a more in-depth knowledge and ease when working with the science of networks. The development of this idea will be explained both in a practical and theoretical way, how to design the assembly with respective tests and for a more understandable way to identify the factors that make this possible through an investigation in the areas of interest for the realization of this Project

Study on the Connection Between the Set Transient in RRAMs and the Progressive Breakdown of Thin Oxides

In this paper, the transition rate (TR) from the high-resistance state to the low-resistance state of a HfO2-based resistive random access memory (RRAM) is investigated. The TR is statistically characterized by applying constant voltage stresses in the range from 0.45 to 0.65 V. It is found that TR follows a voltage dependence which closely resembles the one exhibited by metal-insulator-semiconductor / metal-insulator-metal structures when subjected to constant voltage stress, but with remarkably different fitting parameters. This result suggests a common underlying mechanism in both evolutionary behaviors. Furthermore, the investigation provides additional evidence supporting the micro-structural changes in the oxide after the forming step as well as the role played by the atomic species during the SET event.Fil: Aguirre, Fernando Leonel. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rodriguez Fernandez, Alberto. Universitat Autònoma de Barcelona; EspañaFil: Pazos, Sebastián Matías. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Suñé, Jordi. Universitat Autònoma de Barcelona; EspañaFil: Miranda, Enrique. Universitat Autònoma de Barcelona; EspañaFil: Palumbo, Felix Roberto Mario. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin