One of the major contributions of Henri de Lubac to contemporary theology is his reflection on the senses of Holy Scripture. Started in Catholicisme , his reflection on this subject reached its full development in Exégèse médiévale. Les quatre sens de l'Ecriture , and was taken up again by way of a synthesis in L'Ecriture dans la Tradition . His book on Origen expresses well the central idea: God reveals himself in history, but these historical events are to be understood (...) spiritually. (shrink)

Code-based cryptography is currently the second most promising post-quantum mathematical tool for quantum-resistant algorithms. Since in 2022 the first post-quantum standard Key Encapsulation Mechanism, Kyber (a latticed-based algorithm), was selected to be established as standard, and after that the National Institute of Standards and Technology post-quantum standardization call focused in code-based cryptosystems. Three of the four candidates that remain in the fourth round are code-based algorithms. In fact, the only non-code-based algorithm (SIKE) is now considered vulnerable. Due to this landscape, (...) it is crucial to update previous results about these algorithms and their functioning. The Fujisaki-Okamoto transformation is a key part of the study of post-quantum algorithms and in this work we focus our analysis on Classic McEliece, BIKE and HQC proposals, and how they apply this transformation to obtain IND-CCA semantic security. Since after security the most important parameter in the evaluation of the algorithms is performance, we have compared the performance of the code-based algorithms of the NIST call considering the same architecture for all of them. (shrink)

Childhood obesity, linked to a sedentary lifestyle and an unbalanced diet, is one of the main problems in today’s Western societies. In this sense, the aim of the study was to analyze students’ perceived satisfaction in physical education classes with learning strategies and engagement in learning and critical thinking as determinants of healthy lifestyle habits. The study involved 2,439 high school students aged 12–18 years (M= 14.66,SD= 1.78). Structural equation modeling was conducted to analyze the predictive relationships between the study (...) variables. The results showed that teaching, teaching mastery, and cognitive development are precursors to deep thinking on the part of students, indicators of the adoption of healthy lifestyle habits. These results reflect the importance of the methodology adopted by the teacher in order to positively influence the students’ habits. (shrink)

Opportunistic behaviors are considered ethically and strategically troublesome since they disrupt otherwise mutually beneficial relationships. Previous literature has shown that firms attempt to protect their investments from opportunism by generating a large amount of patented marginal innovations in domains central to their industry. However, this approach may generate some ethical dilemmas by preventing firms and societies from more radical, collaborative, and much-needed environmental progress. We extend the environmental innovation literature using strategic and ethical lenses to analyze the potential of an (...) alternative, divergent way to provide financial opportunities for a focal firm without aiming to prevent innovative opportunities for competitors. Our longitudinal analysis of 6768 environmental patents from 59 large companies worldwide in the electrical components and equipment industry shows that high levels of innovation intensity, environmental scope, bargaining power, and environmental expertise increase the incidence of patented environmental innovations related to domains in which industry competitors are less focused (i.e., technological divergence). We also show a positive relationship between this divergence and market-based firm performance. Our results suggest that pursuing innovative divergence to avoid opportunism may make ethical and market sense and we also identify the organizational factors that can support these efforts. (shrink)

Environmental research has usually highlighted that the existence of slack resources in an organization helps allocate investment to innovative initiatives. However, the existing literature has paid very limited attention to how slack resources can influence the effects of focused and diversified innovations in different ways. Agency theory scholars claim that a manager’s first preference when confronted with discretionary resources will not generate positive investments for the firm, but their own opportunistic preferences. The differences between focused and diversified environmental innovations allow (...) us to gain a better understanding of the financial impact of being focused and how slack resources matter in this context. We analyze a longitudinal sample of 5845 environmental patents from the 75 largest companies in the electrical components and equipment industry worldwide. Our results show that high levels of slack resources reduce the existing positive relationship between focused environmental innovations and a firm’s financial performance. These results contribute to delineating the theoretical and empirical implications of focused versus diversified environmental innovations and extend the literature on ethical dilemmas concerning managers’ use of slack resources in the firm. (shrink)

With the advent of the cloud computing model allowing a shared access to massive computing facilities, a surging demand emerges for the protection of the intellectual property tied to the programs executed on these uncontrolled systems. If novel paradigm as confidential computing aims at protecting the data manipulated during the execution, obfuscating techniques (in particular at the source code level) remain a popular solution to conceal the purpose of a program or its logic without altering its functionality, thus preventing reverse-engineering (...) on the program even with the help of computing resources. The many advantages of code obfuscation, together with its low cost, makes it a popular technique. This paper proposes a novel methodology for source code obfuscation that can be used together with other traditional obfuscation techniques, making the code more robust against reverse engineering attacks. Three program complexity metrics are used to define three different single-objective combinatorial optimization versions of the problem, which are solved and analysed. Additionally, three multi-objective problems are defined, those considering each of the selected metrics together with the program execution time, in order to avoid strong obfuscations penalizing the performance. The goal of the defined problems is to find sequences of LLVM optimizations that lead to highly obfuscated versions of the original code. These transformations are applied to the back-end pseudo-assembly code (i.e., LLVM Intermediate Representation), thus avoiding any further optimizations by the compiler. Classical genetic algorithms (GAs) are used to solve the studied problems, namely a basic cellular GA for the single-objective problems and the popular NSGA-II for the multi-objective ones. The promising results show the potential of the proposed technique. (shrink)

The numerical study of a glycolytic model formed by a system of three delay differential equations reveals a multiplicity of stable coexisting states: birhythmicity, trirhythmicity, hard excitation and quasiperiodic with chaotic regimes. For different initial functions in the phase space one may observe the coexistence of two different quasiperiodic motions, the existence of a stable steady state with a stable torus, and the existence of a strange attractor with different stable regimes (chaos with torus, chaos with bursting motion, and chaos (...) with different periodic regimes). For a single range of the control parameter values our system may exhibit different bifurcation diagrams: in one case a Feigenbaum route to chaos coexists with a finite number of successive periodic bifurcations, in other conditions it is possible to observe the coexistence of two quasiperiodicity routes to chaos. These studies were obtained both at constant input flux and under forcing conditions. (shrink)

This article reports an empirical investigation of the cognitive effort required to decide in multiattribute binary choice using a variation of the Additive Difference strategy. In contrast with other studies, this paper focuses on the effect of various context variables (rather than task variables) on cognitive effort. In order to select the context variables to be manipulated, we used the model proposed by Shugan (1980; J. Consumer Res. 75 (1980) 99). Our results indicate that there is a positive relationship between (...) the cognitive effort required to decide and the mean of the differences between the dimensions of the choice alternatives. We have also found an inverse relationship between cognitive effort and the variance of the differences between the dimensions of the choice alternatives. Finally, we have found that in negative correlation contexts the effort needed to decide is greater than in positive and null correlation contexts. (shrink)

Resumen El presente artículo, inspirado en la idea de Vernant de que la razón griega es “hija de la ciudad”, aborda el vínculo existente entre las circunstancias políticas y sociales de Éfeso y el pensamiento heraclíteo. En efecto, a partir de la tensión que se produjo entre la realidad histórica en que vivió Heráclito y el resultado de su propia reflexión sobre ella, el filósofo desarrolló una idea de organización de la ciudad, según la cual una pólis debería ser gobernada (...) por el mismo principio rector del universo -i. e. el lógos-, lo cual, en términos prácticos, se traduciría en un modelo político monárquico.This paper, inspired by Vernant’s belief that Greek reason is “a creature of the city”, explores the connection linking Heraclitus’ thought to the political and social circumstances prevailing at Ephesus. Indeed, the tension arising from Heraclitus’ own historical framework and this philosopher’s resulting outlook on it led him to conceive of a rule for organizing a city, according to which a pólis should be governed by the same principle guiding the universe -i. e. the lógos-, which would materialize in concrete form as a monarchical government. (shrink)

The main objective of the article will be to consider and analyze the process of modernization of the Armed Forces in the last decades of the twentieth century, as well as to highlight the obligatory interdependence between it and the changing political-social and international environment. To this end, attention will be paid to the four main milestones of this process: reorganization of the Spanish defence superstructure; reform of the organization of the armed forces and review of the functions entrusted to (...) them; insertion of Spain into Western defensive alliances, and accommodation of the military justice to the common one. (shrink)

Europe: The Space and Time of ReflectionOn the Complutense Research Group La Europa de la Escritura.