We give a short proof of the fundamental theorem of central element theory. The original proof is constructive and very involved and relies strongly on the fact that the class be a variety. Here we give a more direct nonconstructive proof which applies for the more general case of a first-order class which is both closed under the formation of direct products and direct factors.

Introduction: Clinical policies control several aspects of clinical practice, including individual treatment and care, resource management and healthcare professionals’ etiquette. This article presents Clinical Policy Ethics Assessment Tool, an ethical assessment tool for clinical policies that could be used not only by clinical ethics committees but also by policy committees or other relevant groups. Aim: The aim of this study was to find or create a tool to identify ethical issues and/or confirm ethical validity in nursing practice policies, protocols and (...) guidelines. Methodology: The development of Clinical Policy Ethics Assessment Tool involved first a literature review, followed by modification of the Research Protocol Ethics Assessment Tool, which was created to identify research protocols’ ethical issues, and finally, a trial of Clinical Policy Ethics Assessment Tool to ensure its reliability and validity. Ethical consideration: The policies analysed trialling Clinical Policy Ethics Assessment Tool were in the public domain and did not contain any confidential information. Despite that, Clinical Policy Ethics Assessment Tool also had the approval of a research ethics committee. Results: Research Protocol Ethics Assessment Tool was chosen as the template for a Clinical Policy Ethics Assessment Tool, to which several modifications were added to adapt it to work within a nursing practice context. Clinical Policy Ethics Assessment Tool was tested twice, which resulted in a general test–retest reliability coefficient = 0.86, r = 0.84, α1 = 0.817, α2 = 0.824 and interclass correlation coefficient = 0.874. Discussion: Contemporary nursing practice in a developed country is often ruled by clinical policies. The use of Clinical Policy Ethics Assessment Tool could confirm the ethical validity of those clinical practice policies, impacting on nurses’ education, values and quality of care. Conclusion: Clinical Policy Ethics Assessment Tool has the potential to detect ethical issues and facilitate the correction and improvement of clinical policies and guidelines in a structured way. This is especially so as it has shown reliability in detecting issues in clinical policies involving human participants and in encouraging policymakers to consider common ethical dilemmas in nursing practice. (shrink)

Introduction: Nurses who work in an emergency department regularly care for acute patients in a fast-paced environment, being at risk of suffering high levels of burnout. This situation makes them especially vulnerable to be accountable for decisions they did not have time to consider or have been pressured into. Research objective: The objective of this study was to find which factors influence ethical, legal and professional accountability in nursing practice in an emergency department. Research design: Data were analysed, codified and (...) triangulated using qualitative ethnographic content analysis. Participants and research context: This research is set in a large emergency department in the Midlands area of England. Data were collected from 186 nurses using participant observation, 34 semi-structured interviews with nurses and ethical analysis of 54 applicable clinical policies. Ethical considerations: Ethical approval was granted by two research ethics committees and the National Health Service Health Research Authority. Results: The main result was the clinical nursing accountability cycle model, which showed accountability as a subjective concept that flows between the nurse and the healthcare institution. Moreover, the relations among the clinical nursing accountability factors are also analysed to understand which factors affect decision-making. Discussion: The retrospective understanding of the factors that regulate nursing accountability is essential to promote that both the nurse and the healthcare institution take responsibility not only for the direct consequences of their actions but also for the indirect consequences derived from previous decisions. Conclusion: The decision-making process and the accountability linked to it are affected by several factors that represent the holistic nature of both entities, which are organised and interconnected in a complex grid. This pragmatic interpretation of nursing accountability allows the nurse to comprehend how their decisions are affected, while the healthcare institution could act proactively to avoid any problems before they happen. (shrink)

Contemporary healthcare practice has been progressively more regulated to increase efficiency, service user safety and practice quality. However, ethical issues in clinical practice that have not been implemented into regulations are undervalued by policymakers and healthcare institutions Considering the issues found by other authors, the use of a simple tool for policymakers to consider recurrent ethical issues could reduce those issues in a policy-driven clinical practice. The lack of tools to support structured ethical assessment of clinical policies was the main (...) reason to create the Clinical Policy Ethics Assessment Tool, but we realised of its possible advantages: limiting ethical dilemmas posed by policies, ensuring ethical practice by the use of policies and developing a consistent process for policymakers, institutions and healthcare professionals. Nonetheless, even if a tool can be implemented and it supports the creation of policies that reduce ethical issues, if the healthcare professionals are not aware of them they will not be implemented and the issues will continue. (shrink)

Contemporary healthcare practice has been progressively more regulated to increase efficiency, service user safety and practice quality. However, ethical issues in clinical practice that have not been implemented into regulations are undervalued by policymakers and healthcare institutions Considering the issues found by other authors, the use of a simple tool for policymakers to consider recurrent ethical issues could reduce those issues in a policy-driven clinical practice. The lack of tools to support structured ethical assessment of clinical policies was the main (...) reason to create the Clinical Policy Ethics Assessment Tool, but we realised of its possible advantages: limiting ethical dilemmas posed by policies, ensuring ethical practice by the use of policies and developing a consistent process for policymakers, institutions and healthcare professionals. Nonetheless, even if a tool can be implemented and it supports the creation of policies that reduce ethical issues, if the healthcare professionals are not aware of them they will not be implemented and the issues will continue. (shrink)

O presente texto visa analisar de maneira introdutória como se constrói no decurso do pensamento filosófico ocidental a relação de interdependência entre democracia e educação, os argumentos que lhe dão sustentação, bem como as possíveis controvérsias de significação nela existentes. Para esse fim, examinamos obras fundamentais da filosofia e em específico da filosofia da educação, buscando compreender asserções de autores que implícita ou explicitamente tratam dessa articulação.

In this paper we study the subdirectly irreducible algebras in the variety of pseudocomplemented De Morgan algebras by means of their De Morgan p‐spaces. We introduce the notion of the body of an algebra and determine when is subdirectly irreducible. As a consequence of this, in the case of pseudocomplemented Kleene algebras, two special subvarieties arise naturally, for which we give explicit identities that characterise them. We also introduce a subvariety of, namely the variety of bundle pseudocomplemented Kleene algebras, fully (...) describe its subvariety lattice and find explicit equational bases for each subvariety. In addition, we study the subvariety of generated by the simple members of, determine the structure of the free algebra over a finite set in this variety and their finite weakly projective algebras. (shrink)

Se ha sostenido tradicionalmente que los predicados atribuidos a Dios y a las criaturas son análogos. Pero, ¿qué es la analogía? Varios filósofos han pensado que la analogía debe ser considerada como una forma de ambigüedad. Argumentamos aquí que los predicados atribuidos a Dios y a las criaturas no son ambiguos o vagos. Siguiendo algunas sugerencias de McDaniel, proponemos una concepción de la analogía donde el fenómeno semántico está asociado con el carácter más o menos natural de la propiedad o (...) propiedades que instancian las entidades que satisfacen el predicado análogo. Un predicado "θ" es análogo si y sólo si, la propiedad Θ, que algo instancia, si y sólo si es θ, es menos natural que cualquier propiedad Ξ tal que todo lo que instancie Ξ, instancia Θ. Además, se requiere que las entidades de las cuales el término análogo es predicado deban ser ontológica o epistémicamente dependientes unas de otras. || It has been traditionally sustained that predicates attributed to God and to the creatures are analogical predicates. But, what is analogy? Several philosophers have thought that analogy should be taken as a form of ambiguity. Here we argue that predicates attributed to God and to creatures are neither ambiguous nor vague. Following some suggestions given by McDaniel, we propose a view of analogy in which the semantic phenomenon is associated with the more or less natural character of the property or properties that the entities that satisfy the analogous predicate instantiate. A predicate "θ" is analogous if and only if the property Θ, which something instantiates, if and only if it is θ, is less natural that any property Ξ so that anything that instantiates Ξ, instantiates Θ. Furthermore, it is required that the entities of which the analogous term is predicated should be either ontologically or epistemically dependent on each other. (shrink)

Este artigo tem como objetivo apresentar as bases nacionais que constituem a formação do homem burguês e a estruturação do processo educacional que se inicia a partir do século XVII, culminando no florescimento da escola pública na França no século XIX, estendendo-se paulatinamente no Brasil no século XX. O artigo tem como problema investigar se o modelo formativo estruturado na sociedade brasileira contemporaneamente envolve a formação integral do cidadão ou apenas o seu ajustamento à dinâmica social. Face às condições histórico-sociais (...) que imperam nos três últimos séculos, com maior ênfase na segunda metade do século XX, a formação humana sofre duros golpes e, mediante a estruturação da escola pública, a educação dirige-se para atender a ideologia e a dinâmica produtiva da estrutura capitalista do pós-guerra. Retomando autores clássicos como John Locke, Jean Jacques Rousseau, Immanuel Kant e Karl Marx a análise passa a apresentar o cenário em que se constitui a tendência liberal europeia em compreender a formação como parte do processo civilizatório. O texto procura expor que a perspectiva educacional do século XXI, se coloca como um modelo de educação aportado pelos interesses do capital, o qual interfere diretamente na execução de uma educação que poderia ser autorreflexiva e crítica, mas que se mostra oficialmente funcional, adaptativa e instrumental, sem perder de vista o ideal liberal burguês. (shrink)

In this paper we continue the study of the variety \ of monadic Gödel algebras. These algebras are the equivalent algebraic semantics of the S5-modal expansion of Gödel logic, which is equivalent to the one-variable monadic fragment of first-order Gödel logic. We show three families of locally finite subvarieties of \ and give their equational bases. We also introduce a topological duality for monadic Gödel algebras and, as an application of this representation theorem, we characterize congruences and give characterizations of (...) the locally finite subvarieties mentioned above by means of their dual spaces. Finally, we study some further properties of the subvariety generated by monadic Gödel chains: we present a characteristic chain for this variety, we prove that a Glivenko-type theorem holds for these algebras and we characterize free algebras over n generators. (shrink)

Este articulo presenta una revisión de la necesidad y situación general del soporte audiovisual para la formación en el ámbito científico técnico universitario dentro del conjunto de las universidades públicas españolas, contextualizado en la exigencia creciente de virtualización, consecuencia de la aceleración continua de la actividad formativa en línea. Revisando los resultados de la aplicación del Modelo de Producción en Red (audiovisual) desarrollado en su día, como soporte a la necesidad de divulgación científica y formativa. Se presenta un ejemplo de (...) su actualización para la producción de material didáctico, objetivo de prácticas universitarias tanto presenciales como remotas. (shrink)

At present, educational discourses on innovative methodologies make up an enthusiastic panorama that is not exempt from criticism. The aim of this paper is to understand the real possibilities of success for new methodological proposals in a case study focused on the Geography and History classes of a teacher–researcher. The results obtained allow us to identify a central category of analysis, “methodological ineffectiveness”, and two subcategories, “methodological supply” and “methodological demand”. This confirms the importance of exploring the impact of new (...) methodologies based on the factors and voices specific to each educational context. (shrink)

As it is well known, mobile phones have become a basic gadget for any individual that usually stores sensitive information. This mainly motivates the increase in the number of attacks aimed at jeopardizing smartphones, being an extreme concern above all on Android OS, which is the most popular platform in the market. Consequently, a strong effort has been devoted for mitigating mentioned incidents in recent years, even though few researchers have addressed the application of visualization techniques for the analysis of (...) malware. Within this field, the present work proposes the extension of a new technique called Hybrid Unsupervised Exploratory Plots to visualize Android malware datasets. More precisely, the novel Beta-Hebbian Learning (BHL) method is applied for the first time and validated under the frame of Hybrid Unsupervised Exploratory Plots, in conjunction with clustering methods. The informative visualization achieved provides a picture of the structure of the malware families, allowing subsequent analysis of their organization. To validate the Hybrid Unsupervised Exploratory Plot extension and its tuning, the popular Android Malware Genome dataset has been used in the experimental setting. Promising results have been obtained, suggesting that BHL applied in combination with clustering techniques in Hybrid Unsupervised Exploratory Plots are a viable resource for the visualization of malware families. (shrink)

Consumer behavior knowledge is essential to designing successful products. However, measuring subjective perceptions affecting this behavior is a complex issue that depends on many factors. Identifying visual cues elicited by the product’s appearance is key in many cases. Marketing research on this topic has produced different approaches to the question. This paper proposes the use of Noise-Based Reverse Correlation techniques in the identification of product form features carrying a particular semantic message. This technique has been successfully utilized in social sciences (...) to obtain prototypical images of faces representing social stereotypes from different judgements. In this work, an exploratory study on subcompact cars is performed by applying Noise-Based Reverse Correlation to identify relevant form features conveying a sports car image. The results provide meaningful information about the car attributes involved in communicating this idea, thus validating the use of the technique in this particular case. More research is needed to generalize and adapt Noise-Based Reverse Correlation procedures to different product scenarios and semantic concepts. (shrink)

Nuevos espacios de participación de los afrodescendientes en América y el Caribe.

In this work we provide a new topological representation for implication algebras in such a way that its one-point compactification is the topological space given in [1]. Some applications are given thereof.

An algebraically expandable (AE) class is a class of algebraic structures axiomatizable by sentences of the form $\forall \exists! \mathop{\boldsymbol {\bigwedge }}\limits p = q$. For a logic L algebraized by a quasivariety $\mathcal {Q}$ we show that the AE-subclasses of $\mathcal {Q}$ correspond to certain natural expansions of L, which we call algebraic expansions. These turn out to be a special case of the expansions by implicit connectives studied by X. Caicedo. We proceed to characterize all the AE-subclasses of (...) abelian $\ell $ -groups and perfect MV-algebras, thus fully describing the algebraic expansions of their associated logics. (shrink)

The confinement of the population into their homes as a result of COVID-19 has entailed a notable increase in the consumption of diverse media. This exploratory study aimed to examine how the increase in media consumption was related to subjective happiness and psychological well-being. For this purpose, a questionnaire was administered to a sample of Spanish adults to assess their consumption of different media before and during confinement. Moreover, participants were evaluated for hedonic, eudaimonic, social, and experienced happiness by using (...) the Pemberton Happiness Index. The results underlined the great increase in the consumption of TV for entertainment and social networking sites during confinement. Furthermore, it was found that higher consumption was negatively correlated with the level of happiness, so that, people who reported greater well-being, both subjective and psychological, spent less time watching TV and using SNS. In contrast, no association was found between the level of happiness and the consumption of news and radio. Therefore, it seems that far from cultivating greater happiness, those who engaged in heavy consumption of TV entertainment and SNS during confinement were less happy than those who did so more moderately and spent more time using other media or performing other activities. (shrink)

This study aimed to synthesize literature data on male judo combat time in international competitions between 2010 and 2019. The search was carried out from May 8th to June 11th, 2021, in electronic databases using the following keywords: AND. After the selection process, 8 articles were included in the systematic review and 7 in the meta-analysis. These studies analyzed 2,562 international male judo combats over the years 2010 to 2019. We observed that the average male judo combat time changed after (...) each rule change. There was a significant difference between combats that ended up to the regular time and those that needed overtime. There were differences between 60kg and +100kg categories and the others in 2011-2012. However, no significant difference was found between the combat time by weight division after the 2017 rule changes, although there are still differences in relation to the end of the combats. There were significant changes in the male judo combat time with each rule change, and the data from the included studies point to a trend of homogeneity in the combat time spent between the weight divisions over the years, and an increase in the occurrence of Golden Score. More studies need to be carried out to identify the new temporal behaviors of athletes. (shrink)

In this study, we analyzed the relationship between the amodal (semantic) development of words and two popular emotional norms (emotional valence and arousal) in English and Spanish languages. To do so, we combined the strengths of semantics from vector space models (vector length, semantic diversity, and word maturity measures), and feature-based models of emotions. First, we generated a common vector space representing the meaning of words at different developmental stages (five and four developmental stages for English and Spanish, respectively) using (...) the Word Maturity methodology to align different vector spaces. Second, we analyzed the amodal development of words through mixed-effects models with crossed random effects for words and variables using a continuous time metric. Third, the emotional norms were included as covariates in the statistical models. We evaluated more than 23,000 words, whose emotional norms were available for more than 10,000 words, in each language separately. Results showed a curve of amodal development with an increasing linear effect and a small quadratic deceleration. A relevant influence on the amodal development of words was found only for emotional valence (not for arousal), suggesting that positive words have an earlier amodal development and a less pronounced semantic change across early lifespan. (shrink)

The journey through the history of nursing, and its philosophical and political influences of the moment, contextualizes the interest that arose about the nurse–patient relationship after World War II. The concept has always been defined as a relationship but, from a phenomenological approach based on a historical, philosophical, psychological and sociological cosmology, it is possible to re‐conceptualize it as ‘caring interaction’. Under the vision of aesthetics and sociopoetics, the object of nursing care is the most delicate, vulnerable and unrepeatable raw (...) material: the person, whose feelings and reciprocity, which must be considered. In addition, it involves the adoption of the socio‐critical paradigm, as it considers the importance of actively involving the person, not just patient anymore, or their family in the nursing cares, optimizing the reciprocity inherent to this interactivity. In short, our philosophical and epistemological approach to the concept of nurse–patient relationship proposes a new conceptualization of it as a caring interaction. (shrink)

En este artículo llevamos a cabo una extensa revisión de la literatura científica en lo relativo a los vínculos entre materialismo y felicidad, desde un enfoque multidisciplinar que incluye la psicología, la comunicación, la economía y la ética. La línea dominante en la bibliografía insiste en vincular un mayor materialismo con una menor auto-percepción de felicidad y de bienestar, y con una mayor propensión a la depresión. En esta revisión atendemos a los aspectos que así lo evidencian, al rumbo actual (...) de las investigaciones y a los retos aún pendientes de clarificación por parte de la comunidad investigadora. (shrink)

Esta obra se concentra en cuatro temas cruciales de la formación de docentes, tanto antes como durante el servicio y en la enseñanza en diferentes áreas y niveles educativos. En primer lugar, se aborda el asunto de las creencias que los docentes tienen sobre el proceso educativo, las cuales parecen influir en la práctica profesional que estos desarrollan y, por lo tanto, deberían recibir la atención explícita de los procesos de formación de docentes que deseen promover prácticas específicas. El segundo (...) tema de la obra es la relación entre la formación de docentes y la política pública que la rige. En particular, se analizan las reformas curriculares implementadas por varias licenciaturas en universidades privadas colombianas, en respuesta a reformas a la normatividad sobre las condiciones de calidad que a las que deben ajustarse todas las licenciaturas del país. El tercer tema analizado es en qué medida los docentes en educación superior van más allá del dominio de su saber disciplinar atribuyendo importancia a la pedagogía, la didáctica y la práctica reflexiva en su propia práctica docente. Finalmente, se discuten aspectos de la formación de docentes relacionados con los procesos vividos y los retos encontrados por los docentes al entrar en la profesión, su socialización en la comunidad docente, sus identidades como maestros y su motivación para ser docentes. Vale la pena señalar que las contribuciones a este libro comparten el uso de metodologías cualitativas y presentan los resultados de historias de vida, entrevistas, observaciones, y análisis documentales, entre otros. (shrink)

This paper proposes a state-of-the-art methodology for the analysis of stakeholders and their role and performance related to SMEs in the mining industry in the Chilean region of Coquimbo. The relationships between the actors are studied and prioritized according to their support network position. An individual index for each actor based on their influence on solving problems is provided. The social network analysis was used to know the influence of the actors in the sector through the centrality measures. Furthermore, a (...) methodology to measure stakeholders’ influence based on the multicriteria method analytic network process approach is proposed. Both methods are used to identify the main stakeholders, study their relationships, and identify the most influential actors involved in executing strategies to boost the sector performance. The results show that the network remains cohesive thanks to certain actors, while the links between private actors must be strengthened; likewise, some public actors should assume a more proactive role in dealing with the problems of the sector. (shrink)

Positive Youth Development (PYD) is an approach that promotes resilience and focuses on youth strengths rather than their weaknesses as done by the traditional deficit-based perspective. Research in Europe and North America show that developmental assets are associated with school success, psychological well-being, and lower health risks among youth and young adults. However, not much research has been done on these associations in Latin American contexts. The purpose of this research study is to assess the association between substance use behaviors, (...) such as drunkenness and the use of illicit drugs, and mental health, together with the mediating role of developmental assets representing youth strengths (e.g., social competence) and contextual resources (e.g., social support at home or school). Cross-national data was collected from Colombian (n= 210; 70.4% females) and Peruvian(n= 349; 66.5% females) 1st year university students. Results shed light on the protective role of developmental assets regarding substance use behaviors and mental well-being. Specifically, the results showed direct negative associations between developmental assets and substance use behaviors and positive associations of developmental assets with mental health indicators. Internal assets appear to be a stronger predictor of social, emotional, and psychological well-being compared to external assets. We did not find any statistical significance in the association of substance use behavior and mental health. We discuss implications regarding research, policy, and practice. (shrink)

. Se problematiza la comprensión de la violencia en la obra del pensador peruano José Carlos Mariátegui (1894-1930). A partir de la premisa que tal comprensión articula concepciones y concreciones de la violencia, se reconocen, primero, dos concepciones distintas: como-medio y como-reacción. En cuanto a las concreciones se argumentará que esta se encuentra permeada por una nueva agencia política, por el concepto de mito de Georges Sorel, que tendrá sobre ella unos efectos más formales que prácticos, y por las (...) divergencias del panorama social peruano respecto al clima social internacional –donde las condiciones de una situación revolucionaria propuestas por Lenin resultarán claves para entender la postura de Mariátegui–. (shrink)

El presente artículo busca el papel de Don Quijote, el héroe de la literatura española, en el conocimiento de Miguel de Unamuno y José Ortega y Gasset. Para Unamuno, Don Quijote es la figura trágica de la libertad, o lo que es lo mismo, el héroe fragmentado por sí mismo: el héroe trágico que simboliza el espíritu de la fe frente al espíritu prosaico común del mundo. Por otra parte, Don Quijote significa para Ortega la afirmación de la vida (...) por la cultura, la función vital del héroe como un órgano de libertad. (shrink)

Born in 1898, Zubiri’s life unfolds at the same time as the XX century. Though alreadyfully formed intellectually, during the decade of the twenties Zubiri is influenced by thephilosophies of life then in vogue in Europe and, especially is influenced by his teacher inMadrid, José Ortega and Gasset. This leads him to focus on the subject of God based onthe category of life. Religion is not a danger for the fullness of life, as Nietzsche argued, butjust the opposite: it (...) is the aspiration of the human being to a full and endless life. The contrast between this and the historical expression of religions, especially Catholicism, provoked a deep interior crisis for Zubiri. This crisis disappears toward the mid-thirties, afterhis sojourn in Germany and the influence of several authors, especially Heidegger. At thispoint he begins to focus on the topic of the religion in a new way that will no longer varysubstantially throughout the rest of his life. The formula of this change he expounded inhis university course university “Hellenism and Christianity” , opposing the“religion of life” to the “religation of life”. Life is not the original category. Life is religated.To what? To something that is difficult to define based on philosophy, but which Christiantheology expressed, through St. Paul, in the category of mysterion.Nacido el año 1898, la vida de Zubiri transcurre a la par que la del siglo XX. En plenaformación intelectual, durante la década de los años veinte, Zubiri recibe el influjo de lasfilosofías de la vida entonces en boga en Europa y, sobre todo, sufre la influencia de sumaestro más directo en Madrid, José Ortega y Gasset. Esto le lleva a enfocar el tema deDios desde la categoría de vida. La religión no es un peligro para la vitalidad, como defendióNietzsche sino todo lo contrario, la aspiración del ser humano a la vida plena e inacabable.El contraste entre esto y la expresión histórica de las religiones, en especial de la católica,le produjo una profunda crisis interior. Esta crisis desaparece hacia la mitad de los añostreinta, tras su permanencia en Alemania y el influjo de varios autores, en especial de Heidegger. A partir de aquí comienza a enfocar el tema de la religión de un nuevo modo, que yano variará sustancialmente a lo largo de su vida. La fórmula de este cambio la expresó en elcurso universitario “Helenismo y Cristianismo” , contraponiendo la “religión dela vida” a la “religación de la vida”. La vida no es la categoría originaria. La vida está religada. ¿A qué? A algo que desde la filosofía es difícil de definir, pero que la teología cristianaexpresó, a través de Pablo de Tarso, en la categoría de mysterion. (shrink)

As in other countries, the public in Argentina became aware of the existence of something called “the theory of relativity” only after November 1919. Although the news of Arthur Eddington's eclipse expedition, which provided the first confirmation of Einstein's theory, was poorly reported in the newspapers, by the end of 1920 Einstein had become a household name for the educated middle class of Buenos Aires, the capital city of the country. This was in great measure the result of the activity (...) of a few enthusiastic lecturers. Significantly, none of them belonged to the prestigious Institute of Physics of the University of La Plata, which during the decade of the 1910s was considered the most important center of physical research in Latin America. Between July and August 1920 the Spanish physicist Blas Cabrera – perhaps the greatest popularizer of Einstein's theory in Spain – visited Argentina and talked about relativity. In September Georges Duclout, a French engineer who had graduated from the Zurich Polytechnic and by then was professor of applied mechanics at the School of Exact, Physical and Natural Sciences of the University of Buenos Aires, also gave a series of conferences on the subject. That same month José Ubach, a Jesuit astronomer trained at the Ebro Observatory in Spain, and established in Buenos Aires, lectured on relativity at the Colegio del Salvador. (shrink)