This paper presents a human-robot closely collaborative solution to cooperatively perform surface treatment tasks such as polishing, grinding, finishing, deburring, etc. The proposed scheme is based on task priority and non-conventional sliding mode control. Furthermore, the proposal includes two force sensors attached to the manipulator end-effector and tool: one sensor is used to properly accomplish the surface treatment task, while the second one is used by the operator to guide the robot tool. The applicability and feasibility of the proposed collaborative (...) solution for robotic surface treatment are substantiated by experimental results using a redundant 7R manipulator: the Sawyer collaborative robot. (shrink)

This paper presents a human-robot closely collaborative solution to cooperatively perform surface treatment tasks such as polishing, grinding, finishing, deburring, etc. The proposed scheme is based on task priority and non-conventional sliding mode control. Furthermore, the proposal includes two force sensors attached to the manipulator end-effector and tool: one sensor is used to properly accomplish the surface treatment task, while the second one is used by the operator to guide the robot tool. The applicability and feasibility of the proposed collaborative (...) solution for robotic surface treatment are substantiated by experimental results using a redundant 7R manipulator: the Sawyer collaborative robot. (shrink)

El artículo ofrece una reflexión personal sobre los principios de la bioética. El tiempo de los derechos exige su positivización: es un riesgo y una oportunidad. El autor analiza la situación actual y señala la fragilidad de los principios por su indeterminación. Muestra el proceso de positivización y concluye que los principios deben ser positivizados y las reglas formuladas de acuerdo con los principios. Como en los juegos de suma cero si las reglas ganan, los principios pierden. Parece que los (...) principios son víctimas de su éxito. Sin embargo, el triunfo de los principios, su transformación en reglas no anula, sino que refuerza los principios. (shrink)

We analyze the prestige of 1,500 scholars in economics, sociology, and management who have Spanish and French institutional affiliations operationalized by their h-index in Scopus and Google Scholar. We use a negative binomial count model to examine how some individual factors affect the h-index from both databases. The results show a non-monotonic relationship between the researchers’ career length and their h-index. There is a positive and statistically significant relationship between total research output and the h-index. The share of publications in (...) English over total publications has also a positive and statistically significant effect on the h-index, except in a single case, while the share of publications in other foreign languages does not have such effect. Finally, we found that the effects of the number of citations received by documents in English and by those in the vernacular language on the h-index vary according to the database, the country, and the discipline in question. (shrink)

La intención de nuestro trabajo ha sido la de exponer la anticipación pragmática que realizara U. Eco en "Obra abierta", ya en 1962, insustituible para una hermenéutica de la obra de arte, que pone especial atención en la instancia del usuario, imaginando un lector modelo ejerciendo actos de libertad consciente para una obra que se presenta como abierta, a veces en movimiento, e invariablemente como metáfora epistemológica de nuestro tiempo.Hemos presentado algunos aportes que sobre el contexto han realizado lingüistas, aportes (...) que pueden trasladarse satisfactoriamente al campo de la estética, como adecuado límite a una multiplicidad infinita de sentido de la obra de arte, para servirle de gran utilidad, a pesar de que ciertas teorías ya clásicas de la Estética puedan haber pensado, en su momento, lo contrario.Finalmente, buscando algo diferente, con relación a los efectos de las obras de arte en sus gozadores, provocados intencionalmente por sus autores, hemos insertado ejemplos de experiencias propias y disímiles entre las mismas, como nos sucedió con J. L. Borges y con la banda de rock Los Redonditos de Ricota. (shrink)

What is ethnicity and how does it inform the way we understand ethical and political issues involving ethnic change and ethnically conscious public policies? Jorge J. E. Gracia put forth what he calls his ‘Familial-Historical View’ of ethnicity in which Hispanic identity is understood in terms of history and family resemblances. He criticizes what he calls the ‘Common-Bundle View’ of ethnicity which understands ethnic belonging in terms of an essence. I defend two negative theses which lead to the outlines of (...) a positive thesis: (1) Gracia’s arguments against the Common-Bundle View are not effective; (2) the Familial-Historical View is inadequate because it downplays the essential role that cultural phenomena play in making Hispanic history ethnically relevant to Hispanic identity. As a way of building on the Common-Bundle View I sketch a reformulation that avoids Gracia’s criticisms and is more politically and ethically effective than his family resemblance view of ethnicity. (shrink)

Se explora cr.ticamente el pensamiento del fil.sofo colombiano Jorge Aurelio Díaz acerca de la religi.n. En particular, se examina, por un lado, la cuestión del lugar y el papel de la religi.n en la modernidad, a partir de la pregunta por la racionalidad y el valor cognitivo de la creencia religiosa, y, por otro lado, la diferencia entre misticismoy religión. Se plantear.n y discutir.n algunos aspectos problemáticos de lamanera en que Díaz comprende ambos asuntos.

What is ethnicity and how does it inform the way we understand ethical and political issues involving ethnic change and ethnically conscious public policies? Jorge J. E. Gracia put forth what he calls his ‘Familial-Historical View’ of ethnicity in which Hispanic identity is understood in terms of history and family resemblances. He criticizes what he calls the ‘Common-Bundle View’ of ethnicity which understands ethnic belonging in terms of an essence. I defend two negative theses which lead to the outlines of (...) a positive thesis: (1) Gracia’s arguments against the Common-Bundle View are not effective; (2) the Familial-Historical View is inadequate because it downplays the essential role that cultural phenomena play in making Hispanic history ethnically relevant to Hispanic identity. As a way of building on the Common-Bundle View I sketch a reformulation that avoids Gracia’s criticisms and is more politically and ethically effective than his family resemblance view of ethnicity. (shrink)

The objective of this work is to establish a relationship between the cutting time in rocks, determining a speed and the point load strength index test, Is, to characterize the rock in terms of resistance and avoid sending samples to laboratories. As a first stage, on andesite samples, 5 x 5 x 10 cm test tubes were made. After the elaboration they were subjected to cutting, using an electric floor cutter and the time was evaluated. This cut was made in (...) a transversal way and two parts were obtained, one of them with dimensions 5 x 5 x 5 cm, approximately. In a third stage, the point load strength test was carried out in a press built for this purpose. Finally, the cutting speeds were correlated with the point load test values and only when rock samples do not pigeonhole on the proposed relationship, send them to the laboratory. Keywords: Mining fortification, uniaxial compressive strength, rock cutting, point load strength test index. References [1]P. Feijoo, R. Aucay, D. Ordoñez, "Aplicación del esclerómetro para la determinación de resistencia a compresión de rocas", presentado en el IV Congreso Internacional de Minería y Metalúrgia, Varadero, Cuba, 2018. [2]P. Feijoo y M. Román, «Correlación entre la Deformación y la Resistencia a la Compresión de rocas», uct, vol. 23, n.º 91, p. 6, may. 2019. [3]P. Feijoo, A. Bravo, N. Escandón, "Aplicación “UDAFORMIN” para la determinación del tipo de fortificación minera", presentado en el XII Congreso Iberoamericano de Computación para el Desarrollo, San Salvador, El Salvador, 2019. [4]P. Feijoo y C. Iñiguez, «Corte en las Rocas y su Relación con la Resistencia a Comprensión Simple», RISTI, n.º E 30, p. 59-67, jun. 2020. [5]P. Feijoo y J. Padrón, «La Resistividad de Rocas y su Relación con la Resistencia a Comprensión Simple en Mina», UCT, vol. 24, n.º 99, pp. 61-67, abr. 2020. [6]M. González. El terreno. Ediciones UPC. Barcelona. España, 2001. [7]E. Besoain. Mineralogía de Suelos. Turrialba: Instituto Interamericano de Ciencias Agrícolas de la OEA, 1970. [8]P. Feijoo, A. Flores, B. Feijoo, "The Concept of the Granulometric Area and Its Relation with the Resistance to the Simple Compression of Rocks", presentado en la 7th International Engineering, Sciences and Technology Conference, Panamá, Panamá, 2019, pp. 52-56, doi: 10.1109/IESTEC46403.2019.00018. [9]F. Blyth. Geología para Ingenieros. Cecsa. México D. F. México, 2003. [10] E. Tarbuck & F. Lutgens. Ciencias de la Tierra: Una introducción a la Geología Física. Pearson. Madrid. España, 2005. [11]L. Suarez del Rio, A. Rodríguez, L. Calleja, V. Ruiz de Argandoña, «El corte de rocas ornamentales con discos diamantados: influencia de los factores propios del sistema de corte», CSIC, vol. 48, n.º 250, pp. 53-59, abr-mayjun 1998. [12]Universidad Politécnica de Madrid. Explotaciones de Roca Ornamental. Diseño de explotaciones y selección de maquinaria y equipos. UPM. Madrid. España, 2007. [13]Catalog, Covington,. LAPIDARY & GLASS MACHINERY, USA. Retrieved from https://covington-engineering.com/content/pdf/Covington-Catalog.pdf. [14]D. Burbano, T. García, «Estimación empírica de la resistencia a compresión simple a partir del ensayo de carga puntual en rocas anisótropas », FIGEMPA, vol.1, n.º 2, pp. 13-16, dic. 2016. [15]P. Ramírez, L. de la Cuadra, R. Lain, E. Grigalbo. Mecánica de rocas aplicada a la minería metálica subterránea. Instituto Geológico Minero. Madrid. España, 1984. [16]P. Cordero, "Manual de prácticas de laboratorio de Mecánica de Rocas " tesis, Universidad Nacional Autónoma de México, México D.F., México, 2019. [17]L. González de Vallejo, M. Ferrer. Manual de campo para la descripción y caracterización de macizos rocosos en afloramientos. Instituto Geológico y Minero de España. Madrid. España, 2007. [18]P. Pohjanpera, T. Wanne, E., Johansson. Point Load Test Results From Olkiluoto Area Borehole Cores. Posiva. Finlandia, 2005. [19]P. Ramírez, L. Alejano. Mecánica de rocas: fundamentos e ingeniería de taludes. Universidad Politécnica de Madrid. Madrid. España, 2004. [20]M. Navarrete, W. Martínez, E. Alonso, C. Lara, A. Bedolla, H. Chávez, D. Delgado, J. Arteaga. «Caracterización de propiedades físico-mecánicas de rocas ígneas utilizadas en obras de infraestructura», ALCONPANT, vol. 3, n.º 2, pp. 133-143, ago. 2013. [21]P. Feijoo, "Manual de mecánica de rocas y estabilidad de túneles y taludes" tesis, Universidad del Azuay, Cuenca, Ecuador, 1997. (shrink)

This work presents a proposal for the characterization of the UnconfinedCompressive Strength test, through a series of operations that can be carried outwithout inconvenience in the field. Initially, fresh rock samples are obtained from outcropsin the area and specimens of specific dimensions are made. After the test specimenelaboration phase, crushing and granulometric classification tests are carried out witha set of specimens and in parallel with a second group, UCS tests are carried out. With theresults, the rock is characterized by graphing (...) granulometric curves and in this graph theareas of fine granulometry are focused, inserting in these areas, the average value of UCS,with which it can be identified and determined when it is really necessary and It is inevitableto send rock samples to laboratories, thus saving time and money for the mining project. Keywords: compression, crushing, granulometry, rock. References [1] F. Blyth and M. de Freitas. Geología para Ingenieros. México: CEGSA, 2003. [2] F. Escolano and A. Mazariegos de la Serna. Guía de reconocimiento de rocas en Ingeniería Civil. España: Editorial Garceta, Escuela Técnica Superior de Ingeniería Civil, Universidad Politécnica de Madrid, 2014. [3] G. Stefano and J. Segovia. Notas del curso de Arte Minero I. Ecuador: Universidad del Azuay, 1991. [4] A. Maistri. Guía al Curso de Tratamiento de Minerales y a las Prácticas de Laboratorio. Ecuador: Universidad del Azuay, 1993. [5] O. Bustamante. Conminución de Minerales Trituración y Molienda. Colombia: Instituto de Minerales CIMEX, Universidad Nacional de Colombia-Sede Medellín, 2006. [6] E. Feijoo, C. Flores and B. Feijoo, "The Concept of the Granulometric Area and Its Relation with the Resistance to theSimple Compression of Rocks," 2019 7th International Engineering, Sciences and Technology Conference, Panama,Panama, 2019, pp. 52-56. [7] E. Feijoo and C. Iñiguez, “Corte en rocas y su relación con la resistencia a compresión simple”, RISTI, N.o E 30, pp. 59-67,junio 2020. [8] M. Galván. Mecánica de Rocas. Correlación entre la Resistencia a Carga Puntual y la Resistencia a Compresión Simple. Colombia: Universidad del Valle, 2015. [9] W. Marín. Evaluación de parámetros materiales de fractura en roca intacta. Colombia: Universidad Nacional de Colombiasede Medellín, 2017. [10]E. Feijoo and J. Padrón, “La resistividad de rocas y su relación con la resistencia a compresión simple en mina”, UCT, vol. 24, Núm. 99, pp. 61-67, abril 2020. (shrink)

A idéia que existe um conteúdo comum à percepção e à mera aparência da percepção parece natural: ter uma ilusão não é outra coisa senão ter uma experiência que é subjetivamente indistingüível da percepção, e isto pode ser explicado pela identificação do conteúdo comum aos dois casos. Contra a postulação de um estado mental comum à percepção e à ilusão, alguns autores como P. Snowdon e J. McDowell propuseram uma teoria disjuntiva do conteúdo sensorial. Se um sujeito tem a impressão (...) de perceber algo, ou bem ele percebe de fato, ou é para ele como se ele percebesse. Se esta teoria evita um estado mental “disponível para a experiência nos casos em que há engano e naqueles em que não há engano” (McDowell), o recurso à concepção disjuntiva do conteúdo não é necessário para tanto. Apresento três argumentos contra a teoria disjuntiva da percepção. O primeiro argumento é que não é certo que a teoria disjuntiva possa ser útil na explicação da experiência perceptiva, tanto do ponto de vista da primeira pessoa, quanto do ponto de vista da terceira pessoa. Em seguida, ela não é uma teoria estável do conteúdo perceptivo. Ao considerarmos o desenrolar da experiência no tempo, o interesse de um conteúdo disjuntivo parece bem menos claro, os membros da disjunção vão rapidamente se distinguir. Finalmente, parece-me que a consideração de alguns aspectos da diferença entre a percepção efetiva e pelo menos alguns casos de ilusão perceptiva sugerem um outro caminho para explicar como a percepção nos põe em contato com o mundo. (shrink)

Not long ago, under the influence of Michel Foucault, one spoke of the conjunction of knowledge and power, but in this post-truth era power appears singularly uninterested in knowledge, even as the supporters of Donald Trump claim that he alone of all politicians speaks the truth. This essay proposes to examine the relations of power and knowledge under the present populist assault. This analysis begins in the work of Claude Lefort, who spoke of the separation of knowledge and power in (...) democracy’s symbolic regime, and is then counterposed to Ernesto Laclau’s understanding of ‘populist reason’ in order to explore the present torsion of this relation to the point where power can appear not just separated from, but opposed to knowledge. It will be argued that it is less a question of post-truth than of different forms of truth with different truth claims, borne by different imperatives, and tied to different forms of representation – truth claims that can, in relation to each other, be indifferent, complementary, or conflictual. With this in mind, the essay asks: what is the relation of the people to truth? Do those who claim to represent the people seek possession of a different kind of truth? What is the relation of populism to ideology? And what is populism’s relation to ‘post-modernism’? (shrink)

In the article, I seek to analyse the notion of “resistance” in Judith Butler’s work, to examine how the author has deepen her own theory and reflexions. I begin with the concept of “performative subversion”, fundamental in her first works, and then I connect performativity and precarity to finally develop a performative theory of assembly. This article aims at rethinking ways of resistance that radicalise and pluralise democracy, in the meaning that Ernesto Laclau and Chantal Mouffe gave to the (...) concept of “radical and plural democracy”. (shrink)

Machine generated contents note: 1. -- War on war, by Lewis Thomas -- 2. -- Silent genocide, by Abdus Salam -- 3. -- Error: a stage of knowledge, by Paulo Freire -- 4. -- Doing without a revolution?, by Tahar Ben Jelloun -- 5. -- Stop torture, by Manfred Nowak -- 6. -- Truth, force and law, by Rabindranath Tagore -- 7. -- Violence is an insult to the human being, by Federico Mayor -- 8. -- Totalitarianism banishes politics, by (...) Vaclav Havel -- 9. -- No one will stop us. , by Desmond Tutu -- 10. -- Colonialism and the youth bomb, by Joseph Ki-Zerbo -- 11. -- The shedding of blood -- 12. -- Letter from Nagasaki, by Takashi Nagai -- 13. -- Down with exclusion!, by Herbert de Souza -- 14. -- The nower to sav 'no'. bv loan Martin-Brown -- 15. -- Inquiry into a taboo, by Ouassila Si Saber -- 16. -- The illusions of rationalism, by Ernesto Sabato -- 17. -- The 'poisonous weed', by Ba Jin -- 18. -- Humanity, an ongoing creation, by Ali Ahmad Said Esber (Adonis) -- 19. -- Image, writing and the vandal, by Alberto Moravia -- 20. -- The charms of calumny, by Andres Bello -- 21. -- On the threshold of eternity, by the Abbe Pierre -- 22. -- The control of force, by Karl Jaspers -- 23. -- The nature of force, by Simone Weil -- 24. -- The debt of justice, by Martin Luther King -- 25. -- Democracy and barbarism, by Sergei S. Averintsev -- 26. -- If all the animals should disappear, by Richard Fitter -- 27. -- Irony and compassion, by Octavio Paz -- 28. -- Against all hatred, by Aime Cesaire -- 29. -- Creating differences, by Daniel J. Boorstin -- 30. -- I dislike the word 'tolerance', by Mahatma Gandhi. (shrink)

In this work I attempt to articulate a principle or set of principles that can guide violent revolution, or emancipatory violence, and yet still prevent the end-stage backlash that generally follows; e.g., the Terror's culmination in which the originators are the targets of the Terror.

Identidad y misión de la Universidad Católica - Constitución Apostólica ex corde eclesial sobre la Universidad Católica (extracto) Juan Pablo II - La Universidad latinoamericana hoy / Ignacio Martín Baró, S.J. / - El rol de las Universidades Católicas en la tarea de evangelizar las culturas en América Latina / César Jerez S.J. / - Generar cultura autónoma / Ignacio Martín Baró, S.J / - La enseñanza de cómo ser crítico / John Passmore / - El capitalismo del saber / (...) Iván Illich / - Ensayo sobre educación en América Latina / Ernesto Sábato / - Los retos de la conciencia moderna - Discurso sobre espíritu positivo / Augusto Comte / - En torno a la crítica de la filosofía del derecho de Hegel / Kart Marx / - Prólogo a la contribución a la crítica de la economía política (1859) / Kart Marx / - El neocapitalismo como caldo de cultivo / Carlos Díaz / - La defensa de la libertad / Josef Pieper / - Moral para intelectuales / Carlos Vaz Ferreira / - Desafíos de la globalización / Luis Ugalde S.J.... (shrink)