25312 research outputs found
Sort by
Aprendizaje sobre Computación y Criptografía Cuánticas a través de un Juego de Mesa
Get PDF[ES] Resumen—La computación y la criptografía cuánticas son dos
prometedores campos en rápido crecimiento que atraen a investigadores
tanto de ciencias como de ingeniería. A partir
de la hipótesis de que la enseñanza tradicional es insuficiente
para la introducción en estos campos, este trabajo presenta
una expansión de un juego de los autores, llamado Qubit:
The Game, que es un innovador juego de mesa diseñado
para promover la motivación y facilitar la comprensión de
varios conceptos esenciales de computación cuántica, como cúbit,
puerta y proyección. La expansión aquí presentada esta enfocada
a la criptografía cuántica, haciendo especial hincapié en el
diseño para introducir el funcionamiento de los protocolos
criptográficos de distribución cuántica de claves. Concretamente,
se ilustran aquí dos actividades específicas mediante las cartas
de juego y varios instrumentos adicionales que conforman una
expansión, que representa de manera directa la ejecución del
protocolo de distribución cuántica de claves BB84
Leveraging the Resources of Modern FPGAs in the Design of High-Performance Masked Architectures
Get PDF[EN] Side channel attacks persist as the most relevant
threat against cryptographic primitives like the advanced encryption
standard (AES). Functions which “in paper” are considered
secure can be compromised from their implementations.
An adversary can study the information leakage found in the
electromagnetic footprints of a device to gain insights regarding
its operations. These leakages maintain relationships with the
secrets held by the platform. In the AES case, the encryption
keys. Masked implementations seek to disturb these relationships
with an approach taken from multi-party computing.
Sensitive operations are fragmented into multiple shares which
are processed in a different and independent manner. This
prevents the adversary from gaining a clear perspective of the
process. Protected implementations tend to be costlier than their
generic counterparts, thus they are a good fit for hardware
acceleration. Unfortunately, the design of protected architectures
implies a trade-off between latency, frequency, and the amount
of resources. The latter is usually regarded as a fundamental
characteristic, which results in an impact on the performance of
masked architectures. Nonetheless, modern FPGAs have enough
resources to enable high performance protected implementations.
In this paper, we propose two of such architectures for AES.
We discuss the potential performance advantages obtainable
by leveraging the resources available in modern data-center
acceleration FPGAs
《中华大帝国史》翻译史中的中欧关系
Get PDF[EN] For five centuries, The History of the Great and Mighty Kingdom of China by Juan
González de Mendoza has had a major influence on the international academic community. Each
edition of Mendoza’s book offers an updated interpretation of the contemporary process of Sino-
Western relations. This study sets out to explore the process through which the book was translated
into Chinese, tracing its source texts and analyzing the isomorphism between different editions and the
influence of Sino-Western relations in different contexts.[ES] Desde hace cinco siglos, la obra Historia del gran reino de la China de Juan González de
Mendoza siempre ha ejercido una gran influencia en la comunidad académica internacional. Este artículo
toma como punto de partida la trayectoria de la traducción al chino del libro, y pretende interpretar
la interrelación entre las ediciones de la traducción al chino y el proceso histórico de las relaciones
sino-europeas desde el trasfondo político, económico y social, puesto que cada representación del
libro de Mendoza brinda una interpretación actualizada del proceso contemporáneo de las relaciones
chino-occidentales.[ZH] 五个世纪以来，《中华大帝国史》一直在国际学术界有着重要的国际影响力，门多萨之书
在不同语境下的每一次再现都是对中西关系史进程的一次现实化诠释。本文以该文本的汉译史为研究
脉络，追溯其译本的相关翻译底本，并以这些不同语言版本的出版年代为逻辑出发点，解读《中华大
帝国史》在重要时间节点上的再版与中西关系进程之间的同构性
One-step microwave conversion of paper mill sludge into magnetic activated carbon for the removal of pharmaceuticals from water
Get PDF[EN] This study introduces an innovative approach to convert primary sludge (PS) from the paper mill industry into magnetic activated carbon (MAC). As alternative to multi-step strategies, a one-step microwave pyrolysis process was studied, combining activation and magnetization in a single stage. The main goal was to identify the synthesis parameters that significantly affect the production of magnetically recoverable MAC, and to test its applicability for the removal of pharmaceuticals from wastewater effluents, namely carbamazepine (CBZ), sulfamethoxazole (SMX), and ibuprofen (IBU). A fractional factorial design was employed to assess the influence of four process production variables (FeCl3:PS ratio, KOH:PS ratio, pyrolysis temperature, and post-pyrolysis wash) on six responses (production yield, specific surface area (SBET), saturation of magnetization (MS) and percentage of adsorption for CBZ, SMX and IBU. Statistical analysis revealed that MAC produced with a FeCl3:PS ratio of 1:2, a KOH:PS ratio of 1:5, pyrolysis at 800 °C, and acid washing with 1 M HCl resulted in satisfactory SBET values (338 m2 g−1), sufficient MS (22 emu g−1) for easy recovery from water and high pharmaceuticals adsorption. Adsorption kinetics for the selected MAC were rapid, reaching equilibrium within 1 h for all pharmaceutical systems. The Langmuir model described equilibrium isotherms, showing maximum adsorption capacities (qm) in ultrapure water of 217 ± 6, 261 ± 6, and 210 ± 6 μmol g−1 for CBZ, SMX, and IBU, respectively, while in wastewater effluent, qm were 162 ± 3, 87 ± 4, and 103 ± 5 μmol g−1, respectivelySILos autores agradecen el apoyo financiero prestado al CESAM por FCT/MCTES (UIDP/ 50017/2020 + UIDB/50017/2020 + LA/P/0094/2020), a través de fondos nacionales. Este trabajo también se desarrolló en el ámbito de los proyectos CICECO - Instituto de Materiales de Aveiro UIDB/50011/2020 (DOI 10.54499/UIDB/50011/2020), UIDP/50011/2020 (DOI 10.54499/UIDP/50011/2020) & LA/P/0006/2020 (DOI 10.54499/LA/P/0006/2020), financiados con fondos nacionales a través del FCT/MCTES (PIDDAC). Diogo Pereira agradece su beca de doctorado (2020.05389.BD), apoyada por fondos nacionales y FSE a través de la Fundação para a Ciência e a Tecnologia (FCT
Legal and procedural approach to indirect evidence in the spanish legal process: doctrinal and jurisprudential analysis
Get PDF[ES] El presente Trabajo de Fin de Máster tiene como propósito principal el estudio de la prueba indiciaria y su importancia en el contexto judicial, especialmente en el ejercicio de la función jurisdiccional llevada a cabo por jueces y magistrados durante el proceso de enjuiciamiento. Dado que la legislación procesal ofrece una regulación limitada sobre este tipo de prueba, el trabajo se centra en el tratamiento de los indicios a lo largo de los distintos órdenes jurisdicciones en lo que respecta a los requisitos para su validez, provenientes de la interpretación jurisprudencial, a lo que se añade el análisis de la doctrina especializada. El estudio subraya la relevancia de la prueba indiciaria en la determinación de los hechos que constituyen el objeto del proceso, mostrando que, según la jurisprudencia consolidada, es posible llegar a una convicción judicial firme basándose en los indicios, sin que ello suponga una vulneración de los derechos fundamentales y dentro de los márgenes establecidos por el ordenamiento jurídico.[EN] The main purpose of this Master's Thesis is to study circumstantial evidence and its importance within the judicial context, particularly in the exercise of the jurisdictional function carried out by judges and magistrates during the trial process. Since procedural legislation offers limited regulation regarding this type of evidence, the thesis focuses on the treatment of inferences across various jurisdictional domains, with particular attention to the requirements for their validity, derived from jurisprudential interpretation, along with an analysis of specialized doctrine. The study highlights the relevance of circumstantial evidence in determining the facts that constitute the subject of the case, demonstrating that, according to consolidated jurisprudence, it is possible to reach a firm judicial conviction based on inferences, without violating fundamental rights and within the boundaries established by the legal framework
The taxation of hydrocarbons: analysis of excise duties and their compatibility with European Union law
Get PDF[ES] La armonización del Impuesto Especial sobre Hidrocarburos con el objetivo de ajustarse a la normativa europea y establecer un mercado común en aras de salvaguardar las libertades intracomunitarias, se ha configurado como un proceso lento que, en ocasiones, ha generado disputas entre la legislación española y la europea, por no acatar el legislador nacional lo establecido en las Directivas de la UE en cuanto a imposición indirecta se refiere. Ello ha provocado la emisión de dos sentencias por el TJUE en las que se ha declarada la infracción del Derecho de la Unión por el Estado español. La primera en relación con el impuesto establecido entre los años 2002 y 2013, conocido como céntimo sanitario. La más reciente, derivada del tramo autonómico del impuesto, que estuvo vigente desde el año 2013 hasta el año 2019. Estas sentencias y la vulneración de la normativa de la Unión no sólo han generado un gran número de solicitudes de devolución por el ingreso de cantidades indebidas, sino que, yendo más allá, también plantean dudas sobre la coherencia legislativa interna.[EN] The harmonization of the Special Tax on Hydrocarbons with the aim of adjusting to European regulations and establishing a common market in order to safeguard intra-community freedoms, has been configured as a slow process that, on occasions, has generated disputes between Spanish and European legislation, due to the national legislator not complying with the provisions of the EU Directives regarding indirect taxation. This has led to the issuance of two rulings by the CJEU in which the infringement of Union Law by the Spanish State has been declared. The first in relation to the tax established between 2002 and 2013, known as the health cent. The most recent, derived from the regional section of the tax, which was in force from 2013 to 2019. These rulings and the violation of Union regulations have not only generated a large number of refund requests for the payment of undue amounts, but, going further, they also raise doubts about internal legislative coherence
The role of AI as an unconventional salesperson in consumer buying decisions, satisfaction and happiness
Get PDF[EN] Grounded in consumer motivation theory, this study examined how trust in AI, along with its credibility and
versatility, drives consumers to adopt AI in online retail, ultimately improving consumer satisfaction and
happiness. Survey data from 1,471 consumers in Spain were analysed to scrutinise these linkages. The findings
confirmed the proposed estimated model: trust, credibility, and versatility significantly motivated AI adoption,
which in turn positively influenced satisfaction and consumer happiness. Сonversely, our results cannot evince
the influence of two drivers, namely privacy/security and UI/UX, on consumer motivation to use AI for shopping.
The outcomes of this study underscore the strategic value of trustworthy and adaptive AI in shaping consumer
behaviour and improving retail experiences, suggesting practical guidance for businesses aiming to foster
engagement and emotional connection with their target consumers through AI-driven platforms.SIThis research has been supported by the Junta de Castilla y León (Grant LE030G24)
Valorization of food products in a knowledge-based economy: analysis of the PDO “Sierra Mágina” olive oil cooperatives
No full text[EN] This work revaluates the determinants of value generation in a post-industrial economy through an analysis of olive oil cooperatives in the protected designation of origin (PDO) ‘Sierra Mágina’. A qualitative methodological approach based on thirty semi-structured interviews and one focus group is used. A thematic analysis is conducted using codes to identify, analyse and report data patterns. The failure of the producers of this PDO to appropriate the value generated is confirmed. It is concluded that the PDO does not currently allow the local community to defend itself from the rentier appropriation strategy of other actors in the value chain. To address this problem, the PDO must cease being a simple label manager—an insufficient condition for product differentiation—and integrate new institutional functions related to the cognitive mediation between production and consumption.S
Impact of physical climate risks on agricultural firms’ bankruptcy: evidence from France, Italy, Portugal and Spain from 2016 to 2019
Get PDF[EN] Frequent and long-lasting extreme climate events can impact business-related natural capital, severely affecting
production and resulting in losses for agricultural firms. Physical climate effects are material dependencies
for agricultural businesses and may severely affect their performance and compromise their survival. This
study’s aim is to analyze the comprehensive effect of climate change factors on agricultural firm bankruptcies
in a European geographical area that is especially susceptible to climate change. Employing a panel of 15 036
agricultural firms, we analyze the effects of adverse climatic conditions in the firm’s headquarters area using
logit regressions, an instrumental variable ordinary least squares model, and the gradient-boosting ensemble
method. We find that bankruptcy is conditioned upon extreme weather events, indicating that climate change’s
physical impacts on firm resources already materially affect the agricultural sector’s resilience and survival.
Specifically, abnormally high temperatures, precipitation, and the incidence of fires are significant factors that
contribute to bankruptcy or insolvency. Furthermore, a “fire weather” index comprising high temperatures,
drought, and wind, combined with fire occurrence, intensifies the bankruptcy risk of agricultural businesses.SIThis study was supported by Grant PID2021-124950OB-I00 funded by MCIN/AEI/ 10.13039/501100011033 and by ERDF A way of making Europ
Educar en situación: una propuesta de psiquiatría comunitaria en una asignatura de grado para un museo de arte
No full text[ES] Este artículo quiere contribuir a la investigación de propuestas que ofrezcan posibilidades para pensar la práctica artística, la investigación y la docencia como áreas relacionadas e interdependientes de los currículos de arte y cultura visual. Para ello se muestran los resultados de la creación artística que tienen lugar en la asignatura, pero también se comparte un programa en su relación con el “afuera” de la universidad y en interrelación constante con el hospital psiquiátrico