The emergence and development of 'national sciences' in Latin American countries were not, until very recently, part of the agenda of historians of science because the 'traditional' history of sciences was not interested in the scientific activity of peripheral areas. The history of science is a recent discipline in Mexican historiographic studies. The methodological interest in the history of science, the creation of schools and institutes that deal with it, the establishment of particular chairs, the organization of national societies, and (...) the publication of books and periodicals are all very recent. It is important to carry out studies in the history of science that examine the development of Mexican science introducing the 'local' context, and study how this development has influenced the formation of scientific societies and the development of scientific disciplines in the country. We want to explore the introduction of genetics in Mexico as applied to agriculture between 1930 and 1960. This matter has not been investigated in Mexico and therefore this work would represent one of the first studies of this subject and one of the first studies in the general field of Mexican scientific history. (shrink)

The Central American country of Guatemala committed itself to democratic values and processes in its election of December, 1985. Guatemala, like most other Central American countries, has been through the dictator-constitution-election revolving door many times. For almsot half a century, Guatemala has been afflicted with coups, general-presidents and dictator-presidents. Again, in 1985, Guatemala created a new constitution with provision for democratic presidential elections monitored and declared "democratic" by a score of other nations. The new president, Vinicio Cerezo, and his Minister (...) of Education, Eduardo Meyer Maldonado, emphasized that the elementary school, the only formal educational institution attended by the majority of Guatemalans, must provide those learning experiences required to develop, to nourish and to sustain democracy in Guatemala. (shrink)

Las Tecnologías de la Información y la Comunicación (TIC) han ganado gran relevancia derivado de la situación de salud producida por el Covid-19, por lo que se plantean nuevas dinámicas en la formación docente. El estudio es de corte cualitativo descriptivo y se utilizó el estudio de casos, el análisis de contenido y del discurso. Los docentes exponen la adaptación del diseño tecnopedagógico, motivándolos al autoaprendizaje proactivo de sus estudiantes. El sentido pedagógico del uso de TIC propició un escenario de (...) aprendizaje para favorecer el enriquecimiento de las prácticas de los docentes, donde se logra la democratización del conocimiento. (shrink)

¿Por qué un libro sobre René Girard? ¿En qué consiste su relevancia intelectual? ¿Cuáles son sus aportaciones al pensamiento contemporáneo? ¿Qué áreas del conocimiento abarcan sus tesis? ¿Ha dicho algo nuevo sobre el hombre y la cultura que sea digno de ser resaltado? ¿Por qué sus ideas suscitan polémica en las ciencias humanas? ¿Cuál es su relación con el cristianismo? ¿Aporta algo a la teología que no haya sido dicho todavía? ¿Por qué la teología se siente interpelada e incómoda por (...) su teoría? ¿Por qué algunos le llaman el Darwin de la cultura, otros el Hegel del cristianismo? Este libro quiere tratar de responder a algunas de estas preguntas y ofrecer vías para el debate antropológico y teológico contemporáneo. (shrink)

We explore the distinctive characteristics of Mexico's society, politics and history that impacted the establishment of genetics in Mexico, as a new disciplinary field that began in the early 20th century and was consolidated and institutionalized in the second half. We identify about three stages in the institutionalization of genetics in Mexico. The first stage can be characterized by Edmundo Taboada, who was the leader of a research program initiated during the Cárdenas government (1934-1940), which was primarily directed towards improving (...) the condition of small Mexican farmers. Taboada is the first Mexican post-graduate investigator in phytotechnology and phytopathology, trained at Cornell University and the University of Minnesota, in 1932 and 1933, respectively. He was the first investigator to teach plant genetics at the National School of Agriculture and wrote the first textbook of general genetics, Genetics Notes, in 1938. Taboada's most important single genetics contribution was the production of "stabilized" corn varieties. The extensive exile of Spanish intellectuals to Mexico, after the end of Spain's Civil War (1936-1939), had a major influence in Mexican science and characterizes the second stage. The three main personalities contributing to Mexican genetics are Federico Bonet de Marco and Bibiano Fernández Osorio Tafall, at the National School of Biological Sciences, and José Luis de la Loma y Oteyza, at the Chapingo Agriculture School. The main contribution of the Spanish exiles to the introduction of genetics in Mexico concerned teaching. They introduced in several universities genetics as a distinctive discipline within the biology curriculum and wrote genetics text books and manuals. The third stage is identified with Alfonso León de Garay, who founded the Genetics and Radiobiology Program in 1960 within the National Commission of Nuclear Energy, which had been founded in 1956. The Genetics and Radiobiology Program rapidly became a disciplinary program, for it embraced research, teaching, and training of academics and technicians. The Mexican Genetics Society, created by de Garay in 1966, and the development of strains and cultures for genetics research were important activities. One of de Garay's key requirements was the compulsory training of the Program's scientists for at least one or two years in the best universities of the United States and Europe. De Garay's role in the development of Mexican genetics was fundamental. His broad vision encompassed the practice of genetics in all its manifestations. (shrink)

Specific classes of cyberspaces emphasize different types of digital transactions given the user’s context, thus making it essential to take into account what these environments can afford. In this way, we can portray the niches of technological use as ecologies of particular possibilities and compare how they differ between distinct spheres of human life. The present research is focused on describing the conceptual integration of a taxonomic crossover between Virtual Learning Environments and Educational Affordances of Technology, while also performing empirical (...) testing and determining the psychometric properties in a scale regarding the aforementioned taxonomy. The study sample consisted of 320 students in the departments of foreign languages from three different universities in Sonora. Students were given a questionnaire of 21 items organized into four subscales with a Likert-type response option to measure the notions concerning their usage of Virtual Learning Environments. Internal consistency procedures and confirmatory factor analysis by means of Cronbach’s alpha and Structural modeling support the derived factorial structure, which contains Cyber-Communications, Virtual Behavior Settings, Virtual Communities, and Availability and Access to Connectivity. This structure traces the environmental properties perceived by learners in a virtual environment. Results sustain the initial conceptual construction regarding the proposed taxonomy, conclude that the ‘Virtual Learning Environments Questionnaire’ demonstrates adequate psychometric properties, and validate it as a fitting measure to assess the perceived psychological experience of students in a digital educational setting. (shrink)

The aim of the research was to know the perception of high-level volleyball players of the changes produced in the efficiency of the training process, after a match analysis intervention program based on the Constraint-led Approach. The sample consisted of 11 players from a women's volleyball team. The protocol of the intervention program consisted of providing objective, contextualised and systematic information to the coach that would allow understanding the different real game contexts. We used semi-structured interviews to assess players' perceptions. (...) The athletes perceived changes in training, both in their preparation and development, specifically in greater involvement and organisation in preparing the training; in an increase in the specificity and suitability of training tasks according to individual needs; in the representativeness of the restrictions of the game; in a more tactical approach; in the variability of task and in the accountability to achieve the objective proposed. In addition, in the preparation and development for competition, the players detected more game planning; a deeper analysis of the opponents; an objective selection of the most relevant data, an increase in the depth of match analysis and the inclusion of the weekly meeting with the use of video compared to the previous season. These results expose the benefits of coaches incorporate programmes to obtain objective information about the game in their training process. (shrink)

_Resumen_ _ _ El presente trabajo tiene por objeto reflexionar sobre el carácter filosófico del pensar andino abyayalense, explicitar las características de una racionalidad senti-pensante y relacional que superan las metafísicas subjetivas y, finalmente, ayudar a construir una epistemología decolonial latinoamericana. El logro de estos objetivos se hará en diálogo con la propuesta de la ontología existencial del filósofo alemán Martín Heidegger. _Palabras Clave: _Pensar, Relacionalidad, Epistemología, Filosofía, Andes. _ _ __ _ _ This paper aims to reflect on the (...) philosophical thinking character of the abyayalense Andean tradition, explain the characteristics of a relational sentient-intelligent rationality, and, finally, help build a Latin American decolonial epistemology. The achievements of these goals will be done in dialogue with existential ontology carried out by the German philosopher Martín Heidegger. _Keywords: _Think, Relatedness, Epistemology, Philosophy, Andean. (shrink)

Haciendo uso de paquete informático Bibliometrix y de la Guía Prisma, se desarrolló un análisis bibliométrico de la literatura proveniente de la Web of Science sobre la competencia digital docente universitaria. Se delimita la investigación a través de tesauros de Eric. Se plantearon preguntas de investigación relacionadas con las fuentes de datos, los autores y las redes de colaboración. La investigación evidencia incrementos en la producción a partir del año 2019, la nacionalidad de los autores y la filiación de instituciones (...) resaltan a través de redes de investigaciones extendidas en Iberoamérica. Es necesario ampliar este estudio a otras bases científicas. (shrink)

The history of science within the Ibero-American context has not received significant attention from historians of science. In the case of historical studies of science in Spain and Latin America, research has primarily been carried out under the umbrella of “centers and peripheries,” indicating that despite their historiographical and epistemological importance, narratives on science within certain national contexts have analytical limitations. Recent research has indicated a need to reconstruct transnational stories that account for how knowledge produced in developing countries forms (...) part of the circulation of international knowledge via international networks of collaboration. This perspective enables the... (shrink)

Se realizó una revisión sistemática de la literatura localizada en Scopus sobre la competencia digital (CD) del profesorado universitario; con ayuda de la metodología PRISMA y operadores se delimitó la investigación a través de tesauros de Eric. Los autores/entidades españolas resaltan en la temática, existen esfuerzos orientados al diseño, validación y aplicación de rúbricas a nivel mundial. Los abordajes predominantemente son cuantitativos. La investigación fortalece el entendimiento sobre la CD, existe un efecto positivo otorgado por las CD docentes en la (...) formación de estudiantes, se requiere desarrollar planes de formación y emprender esfuerzos similares en otras bases de datos científicas. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:FROM CAIN AND ABEL TO ESAU AND JACOB Angel Barahona UniversidadComplutense, Madrid The theme of twins or of enemy brothers is one which fascinates anthropologists owing to its frequency, the beauty of its mythopoetic settings, and its social significance. The theme always appears in relation to fratricidal violence, and is always linked to myths offoundation or origin. Clyde Kluckhohn in his book about brothers "born in immediate sequence" (...) reminds us that the death of one of them brings with it a momentary peace, the foundation ofa new social order. Thus it is not the fact ofbeing twins, or antagonistic brotherhood per se which is the key to the stories, but violence: Twins are impure in the same way that a warrior steeped in carnage is impure, or an incestuous couple, or a menstruating woman. All forms of violence lead back to violence. We overlook this fact because the primitive concept of a link between the loss ofdistinctions and violence is strange to us; butwe need only consider the calamities primitive people associate with twins to perceive the logic of this concept. Deadly epidemics can result from contact with twins, as can mysterious illnesses mat cause sterility in women and animals. Even more significant to us is the role oftwins in provoking discord among neighbors, a fatal collapse of ritual, the transgression of interdictions—in sort, their part in instigating asacrificial crisis....Behindthe image oftwins lurks the baleful aspectofthesacred, perceived as a disparate but formidableunified force. (Girard 1977, 58) All the mythological, literaryand historical accounts oftwinswhichwe have involve bloody conflict: Eteocles and Polyneices, Romulus and Remus, Richard the Lion Heart and John Lackland, and so on. To a 2 Angel Barahona surprising extent even the development of the different stories is similar. When Polynices departs from Thebes leaving his sister there, hoping to reign through her, he takes with him his fraternal conflict as if it were an attribute of his being. Wherever he goes his brother appears to him, and will oppose him to the death. When an oracle announced to Adrastrus that his two daughters would marry, respectively, a lion and a wild boar, animals which are different in their appearance but identical in their violence, it was presaging fraternal conflict. In Euripides' The Suppliant Women, the king tells how he came upon his sons-in-law. At his door, one night, Polynices and Tideus, both reduced to poverty, were quarreling furiously over possession ofa camp bed. Their brotherhood by virtue ofmarriage with two sisters brings them within the fraternalcategory, likeOedipus and Creon, orDionysus and Pentheus, rival cousins. A plot of land or a kingdom, a woman or an object, the status of firstborn or an unjust inheritance, all give pretexts for conflict. We cannot avoid conflict when desires converge on the same object. It is difficult for the brothers to be aware of their symmetry, their reciprocity, the intense violence which is hidden behind their brotherhood,—an awareness which might spare them their confrontations—because they never occupy the same positions atthe same time. The reciprocity is real, but it is the sum of non-reciprocal moments. The antagonists occupy the same positions in time, but successively, not simultaneously. The same acts and the same sentiments appear in cyclical alternation, but the brothers cannot directly observe their own reciprocity, and thus their identical nature, because they seem to be differentiated by the role which each one plays. Cain and Abel There are many stories ofconfrontations between brothers in Scripture, including those related to the rights of the first born. From Genesis 4,5 onwards we see how these are an interminable source ofconflicts. The first example, Cain and Abel: "And the LORD had regard for Abel and his offering, but for Cain and his offering he had no regard. So Cain was very angry, and his countenance fell" anticipates the themes ofthe blessing and the looking at the face. And we can observe the games of symmetry with the language: "the LORD had regard for Abel and his offering, but forCain and his offering he had no regard." Cain and Abel are presented as an agriculturalist and as a shepherd respectively, two forms ofsocial life. In this quarrel... (shrink)

José Echeverría. HUITIEME PROPOSITION : L'expérience de vieillir nous renvoie à une limite de la mutation temporelle, c'est-à-dire, à une expérience qui sera la fin de notre temps. Commentaire. Reprenant l'évidence que nous existons et ...

Aworkshop was held August 26–28, 2015, by the Earth- Life Science Institute (ELSI) Origins Network (EON, see Appendix I) at the Tokyo Institute of Technology. This meeting gathered a diverse group of around 40 scholars researching the origins of life (OoL) from various perspectives with the intent to find common ground, identify key questions and investigations for progress, and guide EON by suggesting a roadmap of activities. Specific challenges that the attendees were encouraged to address included the following: What key (...) questions, ideas, and investigations should the OoL research community address in the near and long term? How can this community better organize itself and prioritize its efforts? What roles can particular subfields play, and what can ELSI and EON do to facilitate research progress? (See also Appendix II.) The present document is a product of that workshop; a white paper that serves as a record of the discussion that took place and a guide and stimulus to the solution of the most urgent and important issues in the study of the OoL. This paper is not intended to be comprehensive or a balanced representation of the opinions of the entire OoL research community. It is intended to present a number of important position statements that contain many aspirational goals and suggestions as to how progress can be made in understanding the OoL. The key role played in the field by current societies and recurring meetings over the past many decades is fully acknowledged, including the International Society for the Study of the Origin of Life (ISSOL) and its official journal Origins of Life and Evolution of Biospheres, as well as the International Society for Artificial Life (ISAL). (shrink)

La concepción semántica en filosofía de la ciencia propuso las relaciones de isomorfismo (van Fraassen) y semejanza (Giere) para analizar las representaciones científicas. Recientemente, Ibarra y Mormann han sugerido una geometrización de la concepción representacional en filosofía de la ciencia. Este artículo afirma que es precisa una relación mas general (la de homeomorfismo) para reconstruir las representaciones científicas externas que son utilizadas en la practica científica contemporánea, y especialmente en la visualización científica digitalizada.The semantical view on philosophy of science has (...) proposed the relationships of isomorfism (van Fraassen) and similitude (Giere) in order to analyse scientific representations. Recently, Ibarra & Mormann have suggested a geometrization of the representational view on philosophy of science. This contribution claims that a more general relationship (homeomorfism) is needed to reconstruct external representations used in contemporary scientific practice and, specially, in scientific digitalized visualization. (shrink)

Aunque las innovaciones suelen ser evaluadas únicamente desde una perspectiva económica, aportan otras formas de valor (social, cultural, político, medio-ambiental, moral). La fase de difusión social de las innovaciones es clave para una evaluación integrada y plural de los procesos de innovación. El Manual de Oslo, al identificar la difusión con la comercialización en los mercados, ha generado nuevas modalidades de innovación oculta, que no pueden ser analizadas por los instrumentos usuales de análisis en estudios de innovación. Como conclusión, se (...) propone un cambio metodológico en los estudios de innovación, que permita evaluar las diversas fases de un proceso de innovación y tener en cuenta a los distintos agentes que intervienen en él. (shrink)

La idea de una justicia global y el enfoque desde ese punto de vista de la teoría de la justicia son novedosos en la filosofía moral y política actual. Sin embargo, este artículo trata de mostrar que el debate actual sobre la justicia global se sustenta en parte sobre conceptos y problemas que fueron anteriormente objeto de reflexión y controversia en la historia del pensamiento filosófico y jurídico: la idea de una comunidad humana universal como marco de referencia que convive (...) con la pertenencia a sociedades políticas particulares; la distinción entre derechos y deberes perfectos e imperfectos, así como entre exigencias de justicia y de beneficencia; y la justificación, condiciones y límites de la comunicación, el comercio y la propiedad entre miembros de distintas sociedades políticas. (shrink)

El presente texto reflexiona sobre la noción de utopía expuesta en la filosofía de la liberación de Franz Hinkelammert. Se exponen las condiciones de posibilidad de la misma y se entiende como totalidad ausente, lo que no hace que no se pueda cumplir, pues es entonces cuando se podrían generar toda suerte de violencias y totalitarismos. En ese sentido, la noción de utopía se convierte en eje fundamental para la transformación de la sociedad. En contraposición a esta aproximación, se describe (...) la manera como la modernidad y la posmodernidad Occidentales han generado un antiutopismo que encubre la posibilidad de otros mundos posibles, lo que no es otra cosa sino la imposición de una única utopía a la luz de la cual todas las otras alternativas utópicas son irracionales e ilusorias. (shrink)

A través del análisis de un fragmento escrito probablemente en torno a 1818, intento mostrar en este artículo cómo el descubrimiento del origen de la prosa significó un hito relevante en el pensamiento de Samuel Taylor Coleridge acerca de la distinción entre verso y prosa. Esta marca se fundó en sus estudios de los presocráticos y coincidió con su teoría estética enraizada en el pensamiento de Plotino. Intento poner en evidencia, entonces, cómo una discusión estilística adquirió un alcance filosófico e (...) incluso teológico. (shrink)

After WWII, global concerns about the uses of nuclear energy and radiation sources in agriculture, medicine, and industry brought about calls for radiation protection. At the beginning of the 1960s radiation protection involved the identification and measurement of all sources of radiation to which a population was exposed, and the evaluation and assessment of populations in terms of the biological hazard their exposure posed. Mexico was not an exception to this international trend. This paper goes back to the origins of (...) the first studies on the effects of radiation and on radioprotective compounds in the Genetics and Radiobiology Program of the National Commission of Nuclear Energy founded in 1960, at a time when the effects of radiation on living beings and radiation protection demanded the attention of highly localized groups of scientists and the creation of international as well as national institutions, and its connection to dosimetry and radiation protection until the 1990s. This historical reconstruction examines the circulation of knowledge, scientists, and their material and cognitive resources, to show that radiobiology, with dosimetry and radiation protection as cases in point, not only were carried out with high international standards in parallel with international agencies, but also reflected local material needs, including the standardization of new experimental techniques. (shrink)

The 1968 Olympic Games in Mexico included innovative practices and technological knowledge of human biology. The first time that cytogenetic techniques had been applied to athletes was in the 1966 European Athletics Championship in Budapest and used on Olympic athletes for the first time in Mexico in 1968. The Genetics and Human Biology Program was created for this purpose in 1966 in close collaboration with the Local Organizing Committee, by Mexican geneticists Alfonso León de Garay and Rodolfo Félix Estrada who (...) led the project. The main objective was to study the genetic and anthropological components which determine an Olympic athlete’s abilities. This investigation studied 1,265 game participants and included family studies, cytological analyses, research on single genes, and the study of sex determination. In terms of influence beyond Mexico, this Program was significant as a site of transnational collaboration. It mobilized cognitive and financial resources, scientific practices, and material culture to set up a clinical laboratory in the Olympic Village. The Program also hosted three international seminars in Mexico City, two before the games, to calibrate clinical trials and anthropological tests. One in 1969 to analyze the results and proceed to their publication in 1974. This manuscript will focus on the PGBH to show how its work fits in the larger tapestry of post-1945 human biological studies. Also, to explore how the Olympic athlete populations studied can be considered laboratories of knowledge production or sites of cognition conceived as specific entities for scientific inquiry, standardization of medical practices, and the production or application of medicines. Finally, through the narrative of the different trajectories and collaborations of the leaders of the PGBH, this manuscript will show how contact between their scientific practices brought cytogenetics and sports together. (shrink)

Empirical research on Rational Choice Theory has brought up two focus of the economics laws problem. On one hand, we find the authors who state that the neoclassical economics laws are explanatory and predictive on specific cases: in transparent contexts in which the standard rationality operates successfully. On the other hand, we find the authors who state that the descriptive theories of the rational choice opens up a research path in which fundamental principles of the neoclassical building could be questioned. (...) Both view points have generated an important standard Rational Choice Theory revision what has produced the so called descriptive view point . It implies understanding that most of the choices take place under risky or uncertainty conditions and, that, these choices are far more complex than the normative Rational Choice Theory supposes. This article's main goal is to expand the descriptive point of view in rational choice, theorizing how some factors, coming from the social and cultural environment, operate within the rational choice. Into space of this research essay we find the debatable question of whether these sort of proposals expands the explanation of the deviation of the rational choice normative theory, and that, of the disturbing causes of the microeconomics laws, or they call into question fundamental principles of these laws and therefore they are opening the possibility to focus some economics issues in a new different manner. (shrink)

This paper will address the collaborative networks and the gendered organization of the scientific work at the first Unit on Human Genetics of the Mexican Institute for Social Security. There, women and men had different tasks, duties and authority according to their gender and individual and professional skills. I will focus on physician Susana Kofman, who specialized in cytogenetics with Jérôme Lejeune and Jean de Grouchy in France, and physician Leonor Buentello, who graduated in virus genetics in Germany. This narrative (...) intends to return them to the forefront of the history of cytogenetics and to illustrate the contribution of women to scientific developments when research on human genetics was becoming a medical domain for diagnosis at an international level. (shrink)

El concepto de multitud ocupa un lugar central en la teoría política de Spinoza. Al hacer de la potencia de la multitud el fundamento de la sociedad política, se distancia tanto del contractualismo individualista de Hobbes como del organicismo escolástico. Pero, pese a lo que sugieren algunas interpretaciones, la potencia de la multitud necesita expresarse a través de un marco jurídico e institucional que la ordene y canalice. El autogobierno democrático institucionalizado haría posible el mayor grado de integración y estabilidad (...) de esa potencia. (shrink)

Information technologies have made possible the rising of new forms of communities, cities and societies. These changes are analyzed from the perspective of innovation studies, as technological but also social innovations. Starting from the contributions of Ortega y Gasset to the philosophy of technology, and applying these ideas to the information and communications technologies system, this article introduces the notions of technosocieties and cybercities. Our aim is to deeply examine the Telepolis project; a digital and global city supported by ICT (...) and artificial intelligence. We pay attention to the different challenges that AI will have to face in upcoming years in technosocieties and cybercities. In our opinion, the future of AI is tightly related with the technological support of this kind of new city and their cybercitizens. Finally, we claim that there won’t be a shared public space in the infosphere till public organizations acknowledge the importance of promoting and maintaining this new and already needed digital agora. (shrink)

A discussão nos livros dos Tópicos giram em torno dos debates dialéticos e seus elementos. Aristóteles discorre sobre os gêneros, as propriedades e os chamados acidentes e suas relações predicativas em categorias. Interessa-nos, sobretudo, compreender o papel desempenhado pela Definição e qual sua relação com os demais instrumentos para a dialética.

Este artículo distingue entre creatividad e innovación, asume el enfoque sistémico en estudios de innovación y lo aplica a las innovaciones poéticas y literarias. Se centra en sor Juana Inés de la Cruz, la gran poeta y escritora del virreinato español en México a finales del siglo XVII. Sor Juana vinculó las artes literarias con las ciencias y técnicas de la época barroca y consiguió apoyos sociales, políticos y religiosos que la convirtieron en una mujer emprendedora y altamente innovadora. También (...) se analiza el resurgimiento de la figura de sor Juana en el siglo XX, gracias a escritores como Amado Nervo, Clara Campoamor y Octavio Paz, así como a investigadores mexicanos e internacionales que han generado una gran innovación social, cultural e institucional, el sorjuanismo, cuyos hitos principales se analizan. (shrink)

In a letter of September 1679 to Huygens, Leibniz proposed a calculus situs directly applicable to geometric relations without use of magnitudes. His researehes on this kind of Geometric Calculus were developed along all his life but, unfortunately, only a few Leibniz’ s writings on these matters had been published by Gerhardt and Couturat. They were closely connected to his own researches on Logic Calculus. From a chronological point of view, the unpublished manuscript Circa Geometrica Generalia may be considered as (...) the third most important Leibniz’ contribution on Calculus Situs. CGG summarizes several results obtained by Leibniz from 1679 to 1682 and contains some interesting ideas concerning set theory, geometric axioms, General Topology and Logic Foundations of Geometry.En una carta a Huygens escrita en septiembre de 1679, Leibniz propuso un calculus situs que fuese aplicable al estudio directo de las relaciones geometricas, sin utilizar magnitudes. Sus investigaciones en torno a los Cálculos Geometricos continuaron a lo largo de toda su vida, pero, lamentablemente, Gerhardt y Couturat sólo publicaron una pequeña parte de sus manuscritos sobre estos temas. Estasinvestigaciones estuvieron estrechamente conectadas con los trabajos de Leibniz sobre Cálculos Lógicos. El manuscrito inédito Circa Geometrica Generalia puede ser considerado, desde un punto de vista cronológico, como la tercera más importante contribución de Leibniz al Calculus Situs. En CGG Leibniz resume varios logros obtenidos desde 1679 hasta 1682 y expone ideas interesantes en relación con la Teoría de Conjuntos, los axiomas de la geometria, la Topologia General y los fundamentos logicos de la Geometría. (shrink)

This paper describes the first study of vasectomized men in Latin America; it is based on personal interviews with 172 men who had undergone the operation at least 3 months previously.

The history of Spain in the 20th and 21st century provides us with many examples of mimetic rivalry: the permanent conflict between peoples who inhabit a common territory, seeking their identity through the affirmation of differences. In the never-ending reciprocities that occur throughout the decades, with ferocious feuding between the left and right wings, and disputes between nationalities, we appreciate how the Girardian theses shine some light on conflictive and at times bloody relationships that would be difficult to understand without (...) the illuminating mimetic theory and the scapegoat mechanism.Mimetic theory and the scapegoat mechanism, together with some of Girard's most innovative intuitions (passion for... (shrink)