The origin of paraconsistent logic is closely related with the argument, ‘from the assertion of two mutually contradictory statements any other statement can be deduced’; this can be referred to as ex contradictione sequitur quodlibet (ECSQ). Despite its medieval origin, only by the 1930s did it become the main reason for the unfeasibility of having contradictions in a deductive system. The purpose of this article is to study what happened earlier: from Principia Mathematica to that time, when it became well (...) established. The two main historical claims that I am going to advance are the following: (1) the first explicit use of ECSQ as the main argument for supporting the necessity of excluding any contradiction from deductive systems is to be found in the first edition of the book Grundzüge der Theoretischen Logik (Hilbert, D. and Ackermann, W. 1928. Grundzüge der Theoretischen Logik. Berlin: Julius Springer Verlag); (2) Łukasiewicz's position regarding the logical constraints against contradictions varies considerably from his studies on the principle of (non-) contradiction in Aristotle, published in 1910 and what is stated in his `authorized lectured notes' on mathematical logic that appeared in 1929. The two texts are: 1) a paper in German (Łukasiewicz, J. 1910. `Über den Satz des Widerspruchs bei Aristotles'. Bulletin International de l'Académie des sciences de Cracovie, Classe d'Histoire et de Philosophie, pp. 15–38) [English translation: Łukasiewicz, J. 1971. ‘On the principle of contradiction in Aristotle’, Review of Metaphysics, XXIV, 485–509]; and 2) a book in Polish. Łukasiewicz, J. 1910. O zasadzie sprzecznosci u Aristotelesa Studium krytyczne, Warsaw: Panstwowe Wydawnictwo Naukowe [German translation: Łukasiewicz, J. 1993. Über den Satz des Widerspruchs bei Aristotles. Hildesheim: Georg Olms Verlag]. The lecture notes were then published as a book (Łukasiewicz, J. 1958. Elementy Logiki Matematycznej. Warszawa: Panstwowe Wydawnictwo Naukowe [PWN] and then translated into English (Łukasiewicz, J. 1963. Elements of Mathematical Logic. Oxford, New York: Pergamon Press/the Macmillan Company). The second half of this article will concentrate on Łukasiewicz's position on ECSQ. This will lead me to propose that to regard him as a forerunner of paraconsistent logic by virtue of those early writings is accurate only if his book published in Polish is considered but not if the analysis is restricted to the paper originally published in German (as has been the case for the principal reconstructions of the history of paraconsistent logic). Furthermore, I will stress that in the 1929 book he presented one formalization of ECSQ as an axiom for sentential calculus and, also, he used ECSQ to defend the necessity of consistency, apparently independently of Hilbert and Ackermann's book. At the end, I will suggest that the aim of twentieth century usage of ECSQ was to change from the centuries-long philosophical discussion about contradictions to a more ‘technical’ one. But with paraconsistent logic viewed as a technical solution to this restriction, then, the philosophical problem revives but having now at one's disposal an improved understanding of it. Finally, Łukasiewicz's two different positions about ECSQ open an interesting question about the history of paraconsistent logic: do we have to attempt a consistent reconstruction of it, or are we prepared to admit inconsistencies within it? (shrink)

Moral sensitivity and moral reasoning are essential competencies biomedical researchers have to develop to make ethical decisions in their daily practices. Previous research has shown that these competencies can be developed through ethics education. However, it is unclear which underlying mechanisms best support the development of these competencies. In this article we argue that the development of moral sensitivity and moral reasoning can be fostered through teaching strategies that tap into students’ moral imagination. We describe how moral imagination can stimulate (...) the development of these competencies through three different merits of moral imagination. Moral imagination can help students to 1) transfer and apply abstract moral concepts to concrete situations and contexts, 2) explore the perspective of others, 3) explore and foresee the moral consequences of different decisions and actions. We explain these three merits of moral imagination in the context of biomedical research and present a theoretical model for how these merits can be used to stimulate the development of moral sensitivity and moral reasoning. Furthermore, we describe multiple teaching strategies for biomedical curricula that tap into the three merits of moral imagination. These teaching strategies can inspire teachers to design ethics education that activates students’ moral imagination for the development of moral sensitivity and moral reasoning. (shrink)

It has been pointed out above that Festus in his quotations cares more for the completion of the line than of the sense. His normal form is one complete line. So the probability is that Liu. Andr. com. is an Iambic Senarius, with a dactyl in the first foot and hiatus at the pause in the sense.

Terence was studied, though not so much as Virgil, in monastery-schools. Their magistri bestirred themselves to get aid for pupils. Some famous magister— we know not who—had written, between the lines or in the margins, interpretations of difficult words in at least the three opening plays of the MS. which he used—Andr., Ad., Eun.—if not in all. These interpretations were collected from his MS. and found their way into many monastery-libraries. Goetz has published these glossae collectae of Terence from a (...) tenth century MS. in Vol. V. of his Corpus Glossariorum Latinorum, pp. 529–539; Mr. Austin has added more from a Leyden MS. , written apparently in Belgium or Holland, c. 800–815 A.D. . Probably Dr. Theander will add a further batch from a Paris MS. (shrink)

It has been pointed out above that Festus in his quotations cares more for the completion of the line than of the sense. His normal form is one complete line. So the probability is that Liu. Andr. com. is an Iambic Senarius, with a dactyl in the first foot and hiatus at the pause in the sense.

Terence was studied, though not so much as Virgil, in monastery-schools. Their magistri bestirred themselves to get aid for pupils. Some famous magister— we know not who—had written, between the lines or in the margins, interpretations of difficult words in at least the three opening plays of the MS. which he used—Andr., Ad., Eun.—if not in all. These interpretations were collected from his MS. and found their way into many monastery-libraries. Goetz has published these glossae collectae of Terence from a (...) tenth century MS. in Vol. V. of his Corpus Glossariorum Latinorum, pp. 529–539; Mr. Austin has added more from a Leyden MS., written apparently in Belgium or Holland, c. 800–815 A.D.. Probably Dr. Theander will add a further batch from a Paris MS.. (shrink)

This volume has 41 chapters written to honor the 100th birthday of Mario Bunge. It celebrates the work of this influential Argentine/Canadian physicist and philosopher. Contributions show the value of Bunge’s science-informed philosophy and his systematic approach to philosophical problems. The chapters explore the exceptionally wide spectrum of Bunge’s contributions to: metaphysics, methodology and philosophy of science, philosophy of mathematics, philosophy of physics, philosophy of psychology, philosophy of social science, philosophy of biology, philosophy of technology, moral philosophy, social and political (...) philosophy, medical philosophy, and education. The contributors include scholars from 16 countries. Bunge combines ontological realism with epistemological fallibilism. He believes that science provides the best and most warranted knowledge of the natural and social world, and that such knowledge is the only sound basis for moral decision making and social and political reform. Bunge argues for the unity of knowledge. In his eyes, science and philosophy constitute a fruitful and necessary partnership. Readers will discover the wisdom of this approach and will gain insight into the utility of cross-disciplinary scholarship. This anthology will appeal to researchers, students, and teachers in philosophy of science, social science, and liberal education programmes. 1. Introduction Section I. An Academic Vocation Section II. Philosophy Section III. Physics and Philosophy of Physics Section IV. Cognitive Science and Philosophy of Mind Section V. Sociology and Social Theory Section VI. Ethics and Political Philosophy Section VII. Biology and Philosophy of Biology Section VIII. Mathematics Section IX. Education Section X. Varia Section XI. Bibliography. (shrink)

Given its non-invasive nature, there is increasing interest in the use of transcutaneous vagus nerve stimulation across basic, translational and clinical research. Contemporaneously, tVNS can be achieved by stimulating either the auricular branch or the cervical bundle of the vagus nerve, referred to as transcutaneous auricular vagus nerve stimulation and transcutaneous cervical VNS, respectively. In order to advance the field in a systematic manner, studies using these technologies need to adequately report sufficient methodological detail to enable comparison of results between (...) studies, replication of studies, as well as enhancing study participant safety. We systematically reviewed the existing tVNS literature to evaluate current reporting practices. Based on this review, and consensus among participating authors, we propose a set of minimal reporting items to guide future tVNS studies. The suggested items address specific technical aspects of the device and stimulation parameters. We also cover general recommendations including inclusion and exclusion criteria for participants, outcome parameters and the detailed reporting of side effects. Furthermore, we review strategies used to identify the optimal stimulation parameters for a given research setting and summarize ongoing developments in animal research with potential implications for the application of tVNS in humans. Finally, we discuss the potential of tVNS in future research as well as the associated challenges across several disciplines in research and clinical practice. (shrink)

Given its non-invasive nature, there is increasing interest in the use of transcutaneous vagus nerve stimulation across basic, translational and clinical research. Contemporaneously, tVNS can be achieved by stimulating either the auricular branch or the cervical bundle of the vagus nerve, referred to as transcutaneous auricular vagus nerve stimulation and transcutaneous cervical VNS, respectively. In order to advance the field in a systematic manner, studies using these technologies need to adequately report sufficient methodological detail to enable comparison of results between (...) studies, replication of studies, as well as enhancing study participant safety. We systematically reviewed the existing tVNS literature to evaluate current reporting practices. Based on this review, and consensus among participating authors, we propose a set of minimal reporting items to guide future tVNS studies. The suggested items address specific technical aspects of the device and stimulation parameters. We also cover general recommendations including inclusion and exclusion criteria for participants, outcome parameters and the detailed reporting of side effects. Furthermore, we review strategies used to identify the optimal stimulation parameters for a given research setting and summarize ongoing developments in animal research with potential implications for the application of tVNS in humans. Finally, we discuss the potential of tVNS in future research as well as the associated challenges across several disciplines in research and clinical practice. (shrink)

The Many-Interacting-Worlds (MIW) approach to a quantum theory without wave functions proposed in [8] leads naturally to numerical integrators of the Schrödinger equation on comoving grids. As yet, little is known about concrete MIW models for more than one spatial dimension and/or more than one particle. In honour of Detlef Dürr, we report on a further development of the MIW approach to treat arbitrary degrees of freedom and provide a numerical proof of concept for ground states in 2d. The latter (...) is part of a systematic numerical study [22] that includes also 1d ground and excited states. With this step towards the treatment of higher degrees of freedom we hope to stimulate their further study. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 39.4 (2001) 585-587 [Access article in PDF] Chumaru Koyama, editor. Nature in Medieval Thought: Some Approaches East & West. Studien und Texte zur Geistesgeschichte des Mittelalters. Leiden: Brill, 2000. Pp. xiv + 183. Cloth, $65.00. The subtitle of this volume is misleading. The Japanese scholars represented (Koyama, Y. Iwata, and B. R. Inagaki) were all trained in Western medieval philosophy and are highly (...) respected medievalists. None of the Western contributors is an expert on Eastern philosophy. Even readers familiar with Japan will be hard pressed to find anything characteristically Eastern in any of the contributions.In the forward provided by the editor and in a preface written by W. Kluxen, we are informed that the volume was the product of two international conferences. Western [End Page 585] and Eastern experts on medieval philosophy were assembled to discuss the problem of "how each human being and humanity as a whole will handle nature in the future" (viii). Both Koyama and Kluxen assume that medieval Europeans conceived essential features of the understanding of "nature" now common to the whole world.Judging from the essays in the book, we conclude that the volume represents a beginning. There are connections between some of the essays, but the question remains: can the medieval view of nature offer us guidance on how to deal with our environmental crises? In general, one might expect a congenial relationship between ancient Western organic views and Japanese intuitions about nature. Nevertheless, compromise characterizes technological decision-making in both cultures. The challenge posed by radical environmentalists is the adequacy altogether of anthropocentric environmental ethics to save the planet.The essay by Iwata offers an interpretation of natural teleology that is compatible with mechanism and hypothetical necessity. Iwata suggests that art that pursues its own ends and not as an imitation of nature can be the source of environmental crises. Two papers by Kluxen on ethics, nature, and natural law acknowledge major transformations in the Middle Ages, and the challenge he poses is how to reintegrate reason and nature. K. Riesenhuber challenges recent accounts that claim to find in some twelfth-century authors an autonomous interest in nature. While nature as a discipline did not achieve autonomy in the twelfth century, Riesenhuber detects the stirrings of independence, but knowledge of nature remained subordinate to knowledge of God. L. Honnefelder suggests that guidance for our treatment of nature may lie in developing new models for the combination of the Platonic technomorphic with the Aristotelian biomorphic paradigm. Inagaki's paper on original sin and human nature adopts a stance that conforms to the Judeo-Christian tradition of the human break with nature. Whatever the source of that disintegration, the problem described in this way requires first a healing of human nature. The paper by M. M. Adams considers John Duns Scotus's revision of final causality. Scotus distinguished between the perfection of the being that a thing constitutes and the explanatory function of that achievement. On this account, Scotus revised the analysis to secure one sense in which Goodness explains being. The paper provides an example of the sorts of transformations in the medieval view suggested by several of the other contributors.C. Steel's paper questions the assumptions about the connection between medieval and modern conceptions of nature. Steel adopts a more comprehensive historical perspective. Flawed by its selective reliance on secondary literature, the paper nonetheless represents an important effort to understand our current dilemma from a historical perspective. Steel challenges L. White, Jr.'s now famous claim about the Christian roots of our ecological crisis. Steel overlooks White's appeals to Christian traditions at variance with Christian dualism and to the use of the Bible in the seventeenth century to sanction the study of science as a means to master nature. Steel takes up the vexed question of continuity or discontinuity between medieval philosophy of nature and seventeenth-century science. In the end Steel falls on the side of continuity, yet in a way that can be expressed only dialectically! That is to say, medieval commentaries on... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 269 severally through hearing, tasting, and smelling, so that we should have on our hands five spatially unrelated spaces. He can find no reason for abandoning the spontaneous commonsense conviction that the puffing I hear is that of the locomotive I am looking at, that the chocolate I am tasting is the one I have put in my mouth, that what I am smelling is the rose (...) I am seeing and also perhaps holding; and, to return to Berkeley, that I perceive the surface I am seeing to be the very one that I am touching with my finger. Mr. Armstrong seems to be laying down the basis of a general theory of perception, that no given perception can be reduced to the datum proper to the sense-organ used plus an associate, a guess, or an inference. To turn this negative statement into a positive one, to say what the activity is that grasps more than the presumed datum, and what makes it reliable, is, as the history of the theory of perception makes plain, desperately hard. Far from grumbling at Mr. Armstrong for not having gone forward to this task, I am grateful for his having given us a book that is so intelligent, acute, clear, stimulating, and blessedly concise--one that deserves to be read by anyone interested in Berkeley, or the theory of vision, or the theory of perception generally. T. E. Jzssov Hull, England Studies in the Philosophy of David Hume. A new edition. By Charles W. Hendel. (Indianapolis, New York: The Bobbs-Merrill Co., 1963. 14 x 21. Pp. li + 516.) Cette nouvelle 6dition des Studies a subi d'importants changements non seulement dans sa pr6sentation, mais aussi dans son esprit. Elle nous prouve combien la pens6e d'un homme se d6veloppe sans cesse et s'enrichit. L'interpr&ation d'un philosophe et la pens& m~me du philosophe ont connu et connaissent encore ces transformations. La pens& humaine ne consid~re jamais sa t$che comme achev&. C'est pourquoi nous ne devons jamais cesser d'ftendre le champ de nos &udes philosophiques pour provoquer la naissance de nouvelles comparaisons f&ondes. Nous y passons certes beaucoup de temps, en retour, nous discernons mieux les complexit6s de la nature humaine. Nous savions d6jh qu'il y avait plusieurs Platon, car le progr& de l'homme se poursuivait de dialogue en dialogue; nous savons maintenant qu'il y a plusieurs David Hume, et que le Hume de Kant ou le Hume du dernier siecle, ne peuvent plus 6tre les n6tres. Comme le remarque Charles Hendel, dans son introduction, vingt-cinq annfes ont suffi h renouveler l'interpr&ation que nous donnions de Hume. Aujourd'hui c'est l'imagination qui se forme l'habitude de repr&enter par un seul mot une collection d'id&s semblables et qui nous sugg~re d'user de l'id& de causalit~ pour interpr&er le retour de cons&utions analogues. C'est aussi l'imagination, plus que la raison, qui nous r&~le la probabilit~ d'un &6nement donn6. Hendel nous rapelle aussi que Buder pourrait bien avoir inspir6 ~t Hume l'importance morale de la sympathie, et que l'Alciphron de Berkeley aurait sugg6r6 le Cl~anthe des Dialogues sur la Religion Naturelle. Hendel a 6galement raison d'insister sur l'importance des interpr&ations de Norman Kemp Smith. Cette nouvelle et si 6rudite &ude de Hendel nous fait mieux comprendre ~ la fois les variations des pens6es de Hume, de Kemp Smith et de Hendel lui-m~me. Nous sommes ainsi mieux avertis des difficult6s de l'histoire de la philosophie, dues non seulement au d6veloppement des sciences, mais aussi du progr&s moral et spirituel, sujet h tant de fluctuations dans l'histoire et m~me, ~t une m~me epoque, d'homme h homme. Aussi cette nouvelle ~dition ne manquera pas d'apporter de nouvelles dart& h nombre de ses lecteurs. ANDV.a~ Lotas LEROY Sorbonne... (shrink)

The most common way of proving decidability in propositional modal logic is to shew that the system in question has the finite model property. This is not however the only way. Gabbay in [4] proves the decidability of many modal systems using Rabin's result in [8] on the decidability of the second-order theory of successor functions. In particular [4, pp. 258-265] he is able to prove the decidability of a system which lacks the finite model property. Gabbay's system is however (...) complete, in the sense of being characterized by a class of frames, and the question arises whether there is a decidable modal logic which is not complete. Since no incomplete modal logic has the finite model property [9, p. 33], any proof of decidability must employ some such method as Gabbay's. In this paper I use the Gabbay/Rabin technique to prove the decidability of a finitely axiomatized normal modal propositional logic which is not characterized by any class of frames. I am grateful to the referee for suggesting improvements in substance and presentation.The terminology I am using is standard in modal logic. By aframeis understood a pair 〈W, R〉 in whichWis a class (of “possible worlds”) andR⊆W2. To avoid confusion in what follows, a frame will henceforth be referred to as aKripkeframe. By contrast, ageneral frameis a pair 〈,Π〉 in whichis a Kripke frame andΠis a collection of subsets ofWclosed under the Boolean operations and satisfying the condition that ifAis inΠthen so isR−1“A. A model on a frame (of either kind) is obtained by adding a functionVwhich assigns sets of worlds to propositional variables. In the case of a general frame we require thatV(p) ∈Π. (shrink)

The Derveni papyrus is the oldest literary papyrus ever found, and one of the very few from Greece itself, which makes it one of the most interesting new texts from the ancient Greek world to have been discovered this century. The eschatological doctrines and an allegorical commentary on an Orphic theogony in terms of Presocratic physics which it contains make it a uniquely important document for the history of ancient Greek religion, philosophy, and literary criticism. This book is the first (...) to have been published on the text. It includes a full and reliable translation of the Papyrus together with a range of articles by leading European and American classicists who are internationally recognised experts in Greek religion and philosophy. Professor K. Tsantsanoglou, who will publish the papyrus when work on it is complete, presents important new material and has checked all the articles against the Papyrus. Thus for the first time, material is provided which will authorize scholarship upon the Papyrus in a way hitherto impossible, will stimulate further work on it, and will make the book a standard reference work on the subject for years to come. (shrink)

THE PROBLEM OF THE INTERPRETATION OF HAMANN Johann Georg Hamann is an intriguing but poorly known figure in the contemporary intellectual world. Yet this is the man whom Kierkegaard saluted as "Emperor!", whose writings were to have been arranged for publication by none other than Goethe himself, and whom Dilthey numbered among the primordial figures in the rise of modern historical consciousness. There are reasons for the persistence of this general ignorance. Hamann is deep. And, in addition, there is his (...) forbidding style. The readers of Kierkegaard and Dilthey, two other giants who them selves achieved late recognition, have not had to face this kind of imposing obstacle. Not only does Hamann expect his readers to handle themselves in deep water, but to intuit their way between his ideas which bob up like islands with no visible connection between them. Like Kierkegaard too, Hamann has had his troubles with the public. He himself referred to the hope that he would be understood by a "better posterity". In fact only the last few years have seen the printing of some of his more controversial writings, in particular his theories on the nature of human sexuality. (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)

Sartre rationalizes sexuality much like Plato. Rationalization here refers to the way Sartre tries to facilitate explanation by changing the terms of the discussion from sexual to nonsexual concepts. As a philosophy which, above all, highlights those features of human existence which seem most resistant to explanation, one would expect existentialism to highlight sexuality as a category that is crucial for considering human existence. Descartes comes immediately to mind when one focuses on Sartre's major categories. In Sartre's case however, it (...) is not mind and matter but consciousness and its opposite: "nothingness" and "being." This irreducible dualism is the key to the trouble human beings have with existence. Humans try to deal with the tensions implied by this dualism by trying to pretend people are not subjects but objects. Sartre calls this "bad faith." He begins by attempting to take human sexuality seriously as a fundamental category, but ends by abandoning the effort in favor of other substitutes. (shrink)