The objective of this research is to develop accurate forecasting models for chlorophyll-α concentrations at various depths in El Mar Menor, Spain. Chlorophyll-α plays a crucial role in assessing eutrophication in this vulnerable ecosystem. To achieve this objective, various deep learning forecasting techniques, including long short-term memory, bidirectional long short-term memory and gated recurrent uni networks, were utilized. The models were designed to forecast the chlorophyll-α levels with a 2-week prediction horizon. To enhance the models’ accuracy, a sliding window method (...) combined with a blocked cross-validation procedure for time series was also applied to these techniques. Two input strategies were also tested in this approach: using only chlorophyll-α time series and incorporating exogenous variables. The proposed approach significantly improved the accuracy of the predictive models, no matter the forecasting technique employed. Results were remarkable, with |$\overline{\sigma}$| values reaching approximately 0.90 for the 0.5-m depth level and 0.80 for deeper levels. The proposed forecasting models and methodologies have great potential for predicting eutrophication episodes and acting as decision-making tools for environmental agencies. Accurate prediction of eutrophication episodes through these models could allow for proactive measures to be implemented, resulting in improved environmental management and the preservation of the ecosystem. (shrink)

Recommending the identity of bidders in public procurement auctions has a significant impact in many areas of public procurement, but it has not yet been studied in depth. A bidders recommender would be a very beneficial tool because a supplier can search appropriate tenders and, vice versa, a public procurement agency can discover automatically unknown companies which are suitable for its tender. This paper develops a pioneering algorithm to recommend potential bidders using a machine learning method, particularly a random forest (...) classifier. The bidders recommender is described theoretically, so it can be implemented or adapted to any particular situation. It has been successfully validated with a case study: an actual Spanish tender dataset which has 102,087 tenders from 2014 to 2020 and a company dataset which has 1,353,213 Spanish companies. Quantitative, graphical, and statistical descriptions of both datasets are presented. The results of the case study were satisfactory: the winning bidding company is within the recommended companies group, from 24% to 38% of the tenders, according to different test conditions and scenarios. (shrink)

In this paper an algebraic version for temporal algebras of the logical filtrations for modal and temporal logics is analysed. A structure theorem for free temporal algebras and also some results with regard to the variety of temporal algebras are obtained.

In this paper the structure of pretemporal algebra is used to study some aspects of temporal algebras and modal algebras. The paper contains a computational approach to finite temporal algebras and a general splitting theorem for finite temporal algebras.

In the paper we obtain a new characterization of the BCK-algebras which are subdirect product of BCK-chains. We give an axiomatic algebraizable extension of the BCK-calculus, by means of a recursively enumerable set of axioms, such that its equivalent algebraic semantics is definitionally equivalent to the quasivariety of BCK-algebras generated by the BCK-chains. We propose the concept of "linearization of a system" and we give some examples.

Automatic public malware analysis services provide controlled, isolated and virtual environments to analyse malicious software samples. Unfortunately, malware is currently incorporating techniques to recognize execution onto a virtual or sandbox environment; when an analysis environment is detected, malware behaves as a benign application or even shows no activity. In this work, we present an empirical study and characterization of automatic PMAS, considering 26 different services. We also show a set of features that allow to easily fingerprint these services as analysis (...) environments; the lower the unlikeability of these features, the easier for us to fingerprint the analysis service they belong to. Finally, we propose a method for these analysis services to counter or at least mitigate our proposal. (shrink)

This paper shows that, for a large range of parameters, the journal editor prefers to delegate the choice to review the manuscript to the biased referee. If the peer review process is informative and the review reports are costly for the reviewers, even biased referees with extreme scientific preferences may choose to become informed about the manuscript’s quality. On the contrary, if the review process is potentially informative but the reviewer reports are not costly for the referees, the biased reviewer (...) has no incentive to become informed about the manuscript. Furthermore, if the reports are costly for referees but the peer review processes are not potentially informative, the biased reviewers will never become informed. In this paper, we also present a web resource that helps editors to experiment with the review process as a device for information transmission. (shrink)

In this paper a definition of n-valued system in the context of the algebraizable logics is proposed. We define and study the variety V3, showing that it is definitionally equivalent to the equivalent quasivariety semantics for the “Three-valued BCK-logic”. As a consequence we find an axiomatic definition of the above system.

In this paper we consider twelve classical laws of negation and study their relations in the context of BCK-algebras. A classification of the laws of negation is established and some characterizations are obtained. For example, using the concept of translation we obtain some characterizations of Hilbert algebras and commutative BCK-algebras with minimum. As a consequence we obtain a theorem relating those algebras to Boolean algebras.

Synaesthesia is a condition in which one type of stimulation evokes the sensation of another, as when the hearing of a sound produces photisms, i.e. mental percepts of colours. R is a 20 year old colour blind subject who, in addition to the relatively common grapheme-colour synaesthesia, presents a rarely reported cross modal perception in which a variety of visual stimuli elicit aura-like percepts of colour. In R, photisms seem to be closely related to the affective valence of stimuli and (...) typically bring out a consistent pattern of emotional responses. The present case study suggests that colours might be an intrinsic category of the human brain. We developed an empirical methodology that allowed us to study the subject's otherwise inaccessible phenomenological experience. First, we found that R shows a Stroop effect elicited by photisms despite the fact that he does not show a regular Stroop with real colours. Secondly, by manipulating the colour context we confirmed that colours can alter R's emotional evaluation of the stimuli. Furthermore, we demonstrated that R's auras may actually lead to a partially inverted emotional spectrum where certain stimuli bring out emotional reactions opposite to the normal ones. These findings can only be accounted for by considering R's subjective colour experience or qualia. Therefore the present paper defends the view that qualia are a useful scientific concept that can be approached and studied by experimental methods. (shrink)

Synaesthesia is a condition in which one type of stimulation evokes the sensation of another, as when the hearing of a sound produces photisms, i.e. mental percepts of colours. R is a 20 year old colour blind subject who, in addition to the relatively common grapheme-colour synaesthesia, presents a rarely reported cross modal perception in which a variety of visual stimuli elicit aura-like percepts of colour. In R, photisms seem to be closely related to the affective valence of stimuli and (...) typically bring out a consistent pattern of emotional responses. The present case study suggests that colours might be an intrinsic category of the human brain. We developed an empirical methodology that allowed us to study the subject's otherwise inaccessible phenomenological experience. First, we found that R shows a Stroop effect (delayed response due to interference) elicited by photisms despite the fact that he does not show a regular Stroop with real colours. Secondly, by manipulating the colour context we confirmed that colours can alter R's emotional evaluation of the stimuli. Furthermore, we demonstrated that R's auras may actually lead to a partially inverted emotional spectrum where certain stimuli bring out emotional reactions opposite to the normal ones. These findings can only be accounted for by considering R's subjective colour experience or qualia. Therefore the present paper defends the view that qualia are a useful scientific concept that can be approached and studied by experimental methods. (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)

Charles Taylor es comúnmente identificado como uno de los padres fundadores del comunitarismo teórico, pero tal identificación no da cuenta de la amplitud del pensamiento del filósofo canadiense. A través de este trabajo de investigación pretendemos articular la filosofía de Taylor partiendo del proyecto filosófico que explícitamente inicia en sus primeros trabajos, a saber, la configuración de una antropología filosófica, a través de la cual abordaremos los grandes temas que han ocupado su vida -ética, política y religión- en la puesta (...) en marcha de una filosofía con intenciones puramente prácticas.Charles Taylor is commonly identified as one of the founding fathers of theoretical communitarianism, but such identification does not realize the extent of his thinking. Through this research, we try to articulate the Taylor's philosophy from his philosophical project, that he explicitly started in his early work, namely, the configuration of a philosophical anthropology, through which we will address the major issues that have occupied his life - ethics, politics and religion- in the implementation of a philosophy with purely practical intentions. (shrink)

La obra de Antonio Machado muestra una conocida amplitud temática que se manifiesta, además de en su poética, en sus aportaciones a la filosofía. El presente artículo pretende acercarse a su figura desde la conjunción entre la poética y la filosofía en base a un concepto fundamental en su obra: la alteridad. Como consecuencia de la quiebra de la razón moderna, el solipsismo de corte cartesiano quedó en suspenso. Es en este momento en el que tanto en Europa como en (...) la España de finales del siglo XIX surge una tendencia hacia la alteridad o reconocimiento del otro, tal y como veremos en la obra de Machado y en personajes esenciales de su producción como Juan de Mairena así como, también, en otros autores de la generación del 98. (shrink)

Esta comunicación busca rastrear de la mano de M. Abensour, dos posturas que tienen entre sí diferencias: el paradigma de lo político en Hannah Arendt y, el paradigma de la dominación como forma de lo político, planteado por Adorno y Horkheimer (E.de.F). La importancia está en comprender las diferencias y las implicaciones de cada postura respecto de la otra, en términos del objetivo final: la concepción de lo político desde una postura filosófica crítica.

La fenomenología de la religión es una de las ciencias de las religiones surgida en el siglo XIX. Tras una época dorada, las dificultades epistemológicas y los debates suscitados en torno al estatuto del saber la abocaron a una profunda crisis interna. En la actualidad, existen dos formas de entender la fenomenología de la religión: la primera, como historia comparada de las religiones, centrada en la descripción y clasificación de los fenómenos religiosos; la segunda, como fenomenología hermenéutica, centrada en la (...) comprensión del fenómeno religioso. Ambas corrientes constituyen dos visiones divergentes de la fenomenología de la religión. Sin embargo, podrían concebirse como dos fases fenomenológicas convergentes que apuntan a la consolidación de una antropología filosófica de la religión. En este artículo, analizamos el objetivo, los principales representantes, las dificultades epistemológicas y los logros de cada una de estas for-mas de comprender la fenomenología de la religión y su posible conjugación en la configuración de una filosofía fenomenológica de la religión.The phenomenology of religion is one of the sciences of religions emerged in the 19th century. After a golden age, the epistemological difficulties, and the debates about the status of knowledge led to a deep internal crisis. At present, there are two ways of understanding the phenomenology of religion: the first, as a com-parative history of religions, focused on description and classification of religious phenomena; the second, as a hermeneutical phenomenology, focused on the understanding of religious phenomena. Both currents constitute two divergent views of phenomenology of religion. However, they can be conceived as two convergent phenomenological phases that point to the consoli-dation of a philosophical anthropology of religion. In this paper, we analyze the goal, main representatives, epistemological difficulties and achievements of each of these ways of understanding the phenomenology of religion and its possible conjugation in the configuration of a phenomenological philosophy of religion. (shrink)

Taylor analiza la investigación trascendental como el método propio de la filosofía en una serie de artículos tempranos. El objetivo de este artículo es doble. En primer lugar, queremos acercar al lector a las bases filosóficas del pensamiento de Taylor, exponiendo el descubrimiento y los análisis de Taylor sobre la investigación trascendental. En segundo lugar, queremos mostrar la necesidad de atender a la metodología y a las fases de esta investigación trascendental para la correcta interpretación e identificación de la filosofía (...) de Taylor.Taylor analyzes transcendental investigation as the proper method of philosophy in a serie of early articles. The purpose of this article is double. First, we want to bring the reader closer to the philosophical foundations of Taylor's thought, exposing Taylor's discovery and analysis of transcendental investigation. Second, we want to show the need to attend to the methodology and phases of this transcendental investigation in order to achieve the correct interpretation and identification of Taylor's philosophy. (shrink)

La generación del 98 surgió como consecuencia de una compleja situación económica, social, cultural y política sufrida por nuestro país. La derrota en la Guerra de Cuba y las consecuentes pérdidas coloniales fueron el detonante más inmediato que culmina-ron en un ánimo enrarecido y con aires decadentes. Fruto de este angosto clima surgió una nueva visión de la filosofía y la novela, esto es, una perspectiva hermenéutica diferente de la realidad del momento. En este sentido, haremos mención a cuatro de (...) las obras principales que contribuyeron a dicha construcción teórica, al tiempo que desgranaremos su vertiente filosófica y la incidencia de las mismas en el conocido como problema de España. Pero, ¿qué ocurre con la visión femenina? ¿Cómo fueron las representaciones de las mujeres en estas obras? ¿qué tenían que decir las mujeres de esta generación? Para repensar las humanidades en la actualidad, es pertinente y esencial revisar los cimientos más inmediatos de nuestra filosofía y nuestra literatura, a la par que se torna crucial revisar la perspectiva femenina pues, solo de este modo, podremos tener una visión integradora de la importancia y la actualidad de las humanidades. (shrink)

Fundamental records of Post-Husserlian Philosophy are highlighted by Sein und Zeit, Lʼêtre et le néant and the Phénoménologie de la perception, the work by Merleau-Ponty that deals with the problem of intersubjectvity, starting from a very particular concept of the body understood as «a work of art». However, the reasoning developed in his work of 1945 is about the sociopolitical dimensions of present intersubjectivity. This article carries out the analysis of later works by Merleau-Ponty, in which he studies the relationship (...) between Perception and everyday life to continue with the consideration of the aesthetic and pictorial sphere in order to develop a theory of Vision that has to be understood as a complement to the theory of Perception. This theory would be the ground to transcend the contingency and locate the relationship present-past as the final step of the theory of Intersubjectivity. (shrink)

The relationship between descriptive representation and substantive representation is an issue that has been widely discussed by women’s studies scholars. In general, it is assumed that there exists a positive relationship between the two, but the literature and empirical analysis show that substantive representation also depends on the action of other critical actors, such as gender agencies and the women’s social movement. Comparative research has shown the existence of a common pattern in post-industrial democracies: the development of women-friendly policies depends (...) on the existence of coalitions between these critical actors. However, the analysis usually focuses on the national or regional level, and there is very little analysis at the local level, despite this being a political arena in which these processes can be developed. The aim of this article is to analyse the effect of coalitions of critical actors on the responsiveness to the demands of women’s groups in the case of Spanish municipalities using a representative survey. The objective, therefore, is to apply advances in the women’s substantive representation literature to the local level in Spain. Main results show that responsiveness is higher in municipalities where women’s coalitions exist. (shrink)