The ambiguous-cue task is composed of two-choice simultaneous discriminations involving three stimuli: positive (P), ambiguous (A) and negative (N). Two different trial types are presented: PA and NA. The ambiguous cue (A) served as an S- in PA trials, but as an S+ in NA trials. When using this procedure, it is typical to observe a less accurate performance in PA trials than in NA trials. This is called the ambiguous-cue effect. Recently, it was reported in starlings that the ambiguous-cue (...) effect decreases when the stimuli are presented on an angled (120°) panel. The hypothesis is that the angled panel facilitates that the two cues from each discrimination are perceived as a compound, precluding value transfer via a second-order conditioning mechanism. In this experiment, we used pigeons and a flat panel. Nevertheless, our data were quite similar to the previous data in starlings. We conclude that the form of the panel cannot explain the ambiguous-cue effect. Several alternatives to be explored in future experiments are suggested. The riddle of the ambiguous-cue problem still remains unsolved. (shrink)

The idea that natural selection acts on many levels—and not only at the level of organisms or individual genes—is increasingly accepted among biologists. However, it is not easy to reconcile this idea with the strictly “individualistic” conception of the evolutionary process that has always characterized Darwinian thought. Moreover, the individuality of some forms of life is a vague concept and therefore controversial. This is the case of Candidatus Magnetoglobus multicellularis, whose discovery immediately inspired the following question: Does the concept of (...) individuality have degrees? Alternatively, how far is this structure of prokaryotic cells from deserving to be called an organism? In this article, we propose a new conceptual scheme based on an idea of individuality that is not limited to organisms and that makes sense in terms of Darwinian evolution. In this conceptual scheme, selection at levels above that of the individual organism is interpreted as the evolutionary emergence of higher-level individuality. This proposal may serve as a basis on which to construct a promising hierarchical evolutionary theory. (shrink)

RESUMENEl artículo propone una definición esencial del arte como símbolo. Plantea que la filosofía del arte no puede renunciar a preguntarse qué es lo que hace que algo sea arte, ni contentarse con una respuesta de tipo externalista. Discute en esa línea la definición histórica de N. Carroll. Formula unas condiciones básicas del simbolismo y busca caracterizar lo que hay de específico en el símbolo artístico, lo que lo diferencia de los otros símbolos. Se enfrenta a las críticas al simbolismo (...) que actualmente se dan en ciertas teorías y prácticas artísticas.PALABRAS CLAVEDEFINICIÓN ESENCIALISTA. DEFINICIÓN HISTÓRICA. SIMBOLISMO. REPRESENTACIÓN.ABSTRACTThis article proposes an essential definition of art as symbol. The autor holds that the philosophy of art cannot give up the question about what is it that determines that something is to be considered as art and neither can be satisfied with an answer of an externalist type. This is why the historic definition of N.Caroll is discussed. The author establishes the basic conditions of symbolism and seeks to characterize the specific traits of the artistic symbol, which differentiates it from the other symbols. He faces the critics to symbolism which nowadays can be found in certain theories and artistic practices.KEY WORDSESSENTIALIST DEFINITION, HISTORIC DEFINITION, SYMBOLISM, REPRESENTATION. (shrink)

How to reciprocate a precious gift? In this case the gift was given to us twice. First, in the shape of Paget Henry’s pioneering reinvention of René Ménil’s “Aesthetic Marxism.” Through it, second, we’re led to rediscover the fantastic world of Ménil’s hitherto ignored but crucial contribution to contemporary philosophy: his systematization of the poetics of revolt. Our debt with Ménil and Henry is unpayable. Our humble response in this essay is to offer readers a map to the treasure that (...) is Ménil’s thought. We aim to offer a path across and beyond the sedimentation and pacifying effects of given frames of judgment and the imagination in today’s post-classical public sphere. We call it “fantastic critique,” largely inspired by our wider reading of Ménil’s work and specifically his original concept of the “velocity of the spirit.” It renews the Hegelo-Marxian revolutionary formula. Here. Keep it with you. It’s a precious gift. (shrink)

An introduction to propositional logical and first-order logic.

Software vulnerabilities are the root cause for a multitude of security problems in computer systems. Owing to their efficiency and tight control over low-level system resources, the C and C++ programming languages are extensively used for a myriad of purposes, from implementing operating system kernels to user-space applications. However, insufficient or improper memory management frequently leads to invalid memory accesses, eventually resulting in memory corruption vulnerabilities. These vulnerabilities are used as a foothold for elaborated attacks that bypass existing defense methods. (...) In this paper, we summarise the main memory safety violation types (i.e. memory errors), and analyse how they are exploited by attackers and the main mitigation methods proposed in the research community. We further systematise the most relevant techniques with regards to memory corruption identification in current programs. (shrink)

Este artigo apresenta uma análise sobre o currículo da escola no campo e as relações étnico-raciais no município de Amargosa-Ba, município localizado no território de identidade do Vale do Jiquiriçá. O lócus da pesquisa foi a escola municipal Margarida Maria Alves. As análises foram realizadas por meio da leitura do Projeto Político-Pedagógico e dos Planos de Ensino dos professores das disciplinas de Língua Portuguesa, História, Ciências e Artes. Os documentos curriculares analisados apontam indícios de que a educação no campo do (...) município está sendo trabalhada com o paradigma da educação no campo funcional, porque reconhece as diferenças, todavia, o município ainda adota nas escolas do campo um currículo urbano. Algumas ações inseridas no plano de ensino dos professores indicam que os conteúdos referentes às relações étnico-raciais, estão presentes no cotidiano da escola, ainda que de forma bem tímida, sobressaindo-se na disciplina de História. (shrink)

El artículo ana liza ciertas tensiones internas en la filosofía del arte de Danto, derivadas de una tensión originaria, la que se da entre esencialismo eternizante e historicismo. Analiza después la definición del arte que ofrece Danto, interpretando que es una definición poco específica, a falta de una mayor caracterización del símbolo artístico. Concluye con la consideración de la tesis de los indiscernibles perceptivos, y el problema que plantea en relación con una de las dos condiciones esenciales del arte, la (...) de la "encarnación del significado", problema que se mantiene a la hora de pensar la belleza artística. (shrink)

Physical education is often selected for applying multilingual initiatives through the use of the content and language integrated learning (CLIL) approach. However, it is still unclear whether the introduction of such approach might entail losing Physical Education’s essence and distorting its basic purposes. The aim of this study is to analyse the impact of CLIL on the Physical Education lessons. Given the purpose of this study, a mixed methodological approach based on a sequential exploratory design divided in two different phases (...) is used. We begin with an initial qualitative data collection (phase I) consisting in the analysis of interviews with 12 participants (8 teachers and 4 students). Based on its analysis, two foci are identified: social relationships and physical activity. Then, informed by the results obtained, a quantitative approach is used (phase II), differentiating these two sets of data to deepen on them. On one part, a sociometric questionnaire was applied to analyse the social relationships among CLIL students. On the other part, a quasi-experimental design (n = 49) was implemented using accelerometry to measure the MVPA of the PE sessions. Regarding physical activity, the results show that levels of MVPA are higher in the experimental group (CLIL) than in the control group showing light to the divergent viewpoints of interviewees. However, focusing on social relationships, the sociometric questionnaire results show that there were no statistical significative changes, although some signs of a slight effect on students’ relationships arise depending on their gender. Therefore, more research would be necessary to deepen on how CLIL affects in this regard. (shrink)

Rare neuromuscular diseases are a group of pathologies characterized by a progressive loss of muscular strength, atrophy, fatigue, and other muscle-related symptoms, which affect quality of life levels. The low prevalence, high geographical dispersion and disability of these individuals involve difficulties in accessing health and social care services. Teleassistance is presented as a useful tool to perform psychosocial interventions in these situations. The main aim of this research is to assess the effects of a teleassistance psychosocial program on the QoL (...) levels of people with RNMDs who have different levels of disability. A sample of 73 participants was divided into an experimental group, which participated in the intervention, and a control wait list group. QoL was evaluated through the SIP and the SF-36, and disability through the WHO-DAS II. The participants with a moderate to severe level of disability were those who most benefited from the intervention. The results also revealed that the psychosocial teleassistance program was suitable to improve physical and psychosocial aspects of people suffering from a rare neuromuscular disease with a moderate level of disability, but just psychosocial aspects in those with a severe level of disability. (shrink)

The idea that natural selection acts on many levels—and not only at the level of organisms or individual genes—is increasingly accepted among biologists. However, it is not easy to reconcile this idea with the strictly “individualistic” conception of the evolutionary process that has always characterized Darwinian thought. Moreover, the individuality of some forms of life is a vague concept and therefore controversial. This is the case of Candidatus Magnetoglobus multicellularis, whose discovery immediately inspired the following question: Does the concept of (...) individuality have degrees? Alternatively, how far is this structure of prokaryotic cells from deserving to be called an organism? In this article, we propose a new conceptual scheme based on an idea of individuality that is not limited to organisms and that makes sense in terms of Darwinian evolution. In this conceptual scheme, selection at levels above that of the individual organism is interpreted as the evolutionary emergence of higher-level individuality. This proposal may serve as a basis on which to construct a promising hierarchical evolutionary theory. (shrink)

Background:The first wave of the COVID-19 pandemic caused a shortage of qualified nurses in Spain. As a result, the government authorized the hiring of senior students.Objectives:To explore the ethical dilemmas and ethical conflicts experienced by final-year nursing students who worked during the first outbreak of the COVID-19 pandemic in Spain.Research design:A qualitative exploratory study was conducted using purposive sampling. Semi-structured interviews were carried out using a question guide. Interviews took place via a private video chat room platform. A thematic, inductive (...) analysis was performed of the information gathered.Participants and research context:Eighteen nursing students were recruited from two universities of Madrid, aged between 18 and 65 years old, enrolled in the fourth year of nursing studies and who were hired under a relief contract for health professionals during the pandemic.Ethical considerations:The present study was carried out in accordance with the Declaration of Helsinki, and the study was approved by the Local Ethics Committee of Universidad Rey Juan Carlos.Results:Three specific themes emerged: (a) coping with patient triage, (b) difficulties in providing end-of-life care, and (c) coping with patient death. Nursing students participated in the process of patient selection for resource allocation and ICU bed occupancy. They were shown how to care for patients who were not admitted to the ICU, in their last moments and were faced with the difficulties of applying end-of-life care. Finally, the nursing students were confronted with the death of their patients, in overwhelming numbers and under adverse conditions.Conclusions:These findings can help shed light on the ethical dilemmas and ethical conflicts faced by novice nursing students, incorporated into the workforce during the COVID-19 pandemic. Moreover, it was described that students may normalize the death due to the exhaustion and overwhelmed routine. (shrink)

Although a large number of theories justify the presence of games in school, all of them converge in two of the educational functions described by Biesta, socialization and qualification. In contra...

Co‐expression of two or more genes at the single‐cell level is usually associated with functional co‐regulation. While mRNA co‐expression—measured as the correlation in mRNA levels—can be influenced by both transcriptional and post‐transcriptional events, transcriptional regulation is typically considered dominant. We review and connect the literature describing transcriptional and post‐transcriptional regulation of co‐expression. To enhance our understanding, we integrate four datasets spanning single‐cell gene expression data, single‐cell promoter activity data and individual transcript half‐lives. Confirming expectations, we find that positive co‐expression necessitates (...) promoter coordination and similar mRNA half‐lives. Surprisingly, negative co‐expression is favored by differences in mRNA half‐lives, contrary to initial predictions from stochastic simulations. Notably, this association manifests specifically within clusters of genes. We further observe a striking compensation between promoter coordination and mRNA half‐lives, which additional stochastic simulations suggest might give rise to the observed co‐expression patterns. These findings raise intriguing questions about the functional advantages conferred by this compensation between distal kinetic steps. (shrink)

This study aimed to analyze experiences that consider ICTs in the management of learning in health and to identify some components that can facilitate a management mechanism to promote training and knowledge development for the care of drug use, abuse, and dependence from the perspective of evidence-based learning. To carry out this work, a community-based research methodology has been used, through an educational project with drug learning communities with 200 people from countries in the Americas such as Colombia, Mexico, Panama, (...) Chile, and Paraguay. (shrink)

La neurociencia promete explicar asuntos filosóficos, tanto éticos como filosóficos en general, desde la actividad del cerebro. En este artículo nos proponemos exponer el carácter naturalista de la neurofilosofía, enumerar los problemas de esta propuesta, mostrar como una ontología dualista permite tratar estos problemas de forma más eficaz y ofrecer algunas alternativas a tal dualismo.Neuroscience promises us to explain philosophical issues, from ethics to general philosophy, as brain activity. I this paper we will propose expose the naturalistic view of neurophilosphy, (...) show many problems of this proposal, how a dualistic ontology helps solve efficently these problems and provide some alternative views to such dualism. (shrink)

Some properties and an algorithm for solving systems of multivariate polynomial equations over finite fields are presented. It is then shown how formulas of propositional logics can be translated into polynomials over finite fields in such a way that several logic problems are expressed in terms of algebraic problems. Consequently, algebraic properties and algorithms can be used to solve the algebraically-represented logic problems. The methods described herein combine and generalise those of various previous works.

ObjectiveThis study aims to analyze sociohistorically how the normative patterns of hegemonic masculinity produced impacts on men’s health/mental health in the context of the COVID-19 pandemic.MethodsA qualitative study from a socio-historical perspective was conducted with 50 men based on an online survey. A semistructured form was applied. The data were analyzed by the Collective Subject Discourse method, interpreted in the light of the context of epidemic disease and hegemonic masculinity.ResultsThe experience of the pandemic exposed the normative patterns of masculinities from (...) the consummation of acts representative of the pandemic context, which incited men to deny the existence of COVID-19 disease and to delay the understanding and adoption of measures to protect and control COVID-19. As a repercussion, men presented conflicts in the regulation of emotions; presented emotional suppression; were more reactive; felt threatened regarding the loss of the role of family provider, virility; and revealed a sense of invulnerability, added to the weakening of self-care.ConclusionThe discourse revealed that the men’s behaviors are consistent with the characteristics of hegemonic masculinity, but express signs of recognition that this behavior causes harm to themselves and their health. (shrink)