Feature selection is a widely studied technique whose goal is to reduce the dimensionality of the problem by removing irrelevant features. It has multiple benefits, such as improved efficacy, efficiency and interpretability of almost any type of machine learning model. Feature selection techniques may be divided into three main categories, depending on the process used to remove the features known as Filter, Wrapper and Embedded. Embedded methods are usually the preferred feature selection method that efficiently obtains a selection of the (...) most relevant features of the model. However, not all models support an embedded feature selection that forces the use of a different method, reducing the efficiency and reliability of the selection. Neural networks are an example of a model that does not support embedded feature selection. As neural networks have shown to provide remarkable results in multiple scenarios such as classification and regression, sometimes in an ensemble with a model that includes an embedded feature selection, we attempt to embed a feature selection process with a general-purpose methodology. In this work, we propose a novel general-purpose layer for neural networks that removes the influence of irrelevant features. The Feature-Aware Drop Layer is included at the top of the neural network and trained during the backpropagation process without any additional parameters. Our methodology is tested with 17 datasets for classification and regression tasks, including data from different fields such as Health, Economic and Environment, among others. The results show remarkable improvements compared to three different feature selection approaches, with reliable, efficient and effective results. (shrink)

In Spoils of War, a diverse group of distinguished contributors suggest that acts of aggression resulting from the racism and sexism inherent in social institutions can be viewed as a sort of "war," experienced daily by women of color.

It has become almost commonplace to recognise that teaching is an embodied practice. Most analyses of teaching as embodied practice focus on the embodied nature of the teacher as subject. Here, we use Butler's concept of performativity to analyse the reiterated acts that are intelligible as—performatively constitute—teaching, rather of the teacher as subject. We suggest that this simultaneously helps explain the persistence of teaching as a narrow repertoire of actions recognisable as ‘teaching’, and the policing of conformity to teaching thus (...) embodied. However, like performatively accomplished subjectivity, this repertoire is unstable and ambiguous, and thus open to change and disruption. Moreover, teacher subjectivities may lead them to mobilise these possibilities of disruption. (shrink)

Background Voluntary post-mortem donation to science (PDS) is the most appropriate source for body dissection in medical education and training, and highly useful for biomedical research. In Mexico, unclaimed bodies are no longer a legal source, but PDS is legally possible, although scarcely facilitated, and mostly ignored by the general population. Therefore, we aimed to evaluate the attitude and willingness for PDS and to identify a sociodemographic profile of people with willingness toward PDS. Methods A validated on-line survey was distributed (...) by the convenience method via the social networks of a Catholicism-inspired, private university in northern Mexico. Frequency analyses of all variables and coded free comments were complemented with association studies. Results Although the responder cohort (n = 143) was too small and biased to be representative of the university community (n = 13,500), willingness to post-mortem organ donation was 90.7% and to PDS 70.7%. In this cohort, PDS willingness had the strongest association with mature age (> 40 years old; P, 0.0008). Among young adults, willingness to PDS was the lowest among volunteers from technical and business schools and the highest among those from the social sciences (P, 0.009). Respondents from the social sciences were also the most consistent between attitude and behavior with respect to organ donation. A free comment option revealed respondents were interested in the unusual taboo topic. Conclusions A small, but sufficiently large proportion expressed willingness toward PDS. In our university cohort, which was biased in higher education and altruism, mature age and social interest were associated with PDS willingness. (shrink)

Very few scientists today question the fact that information, together with matter and energy, is one of the three constructs forming the ontology of the universe. However, there is still a long way to go before in order to establish the interrelations between information and energy and information and matter, as Einstein did between matter and energy. In this paper, after introducing the energy, matter, information model, which covers the three constructs and their relationships, we illustrate real examples—two qualitative and (...) two quantitative—of the interrelations between energy and information. This closes the open question with respect to the interrelationship between energy and information. (shrink)

Gottfried Wilhelm Leibniz is the self-proclaimed inventor of the binary system and is considered as such by most historians of mathematics and/or mathematicians. Really though, we owe the groundwork of today’s computing not to Leibniz but to the Englishman Thomas Harriot and the Spaniard Juan Caramuel de Lobkowitz, whom Leibniz plagiarized. This plagiarism has been identified on the basis of several facts: Caramuel’s work on the binary system is earlier than Leibniz’s, Leibniz was acquainted—both directly and indirectly—with Caramuel’s work and (...) Leibniz had a natural tendency to plagiarize scientific works. (shrink)

La pandemia del Covid-19 provocó un cambio forzoso en la enseñanza universitaria, tanto a nivel metodológico como práctico. La Universidad de Granada ha creado un triple modelo basado en tres escenarios diferentes: virtual (e-learning), semipresencial (b-learning) y presencial. Los objetivos que pretendemos alcanzar consisten en presentar, analizar y difundir este modelo pedagógico creado para hacer frente a los desafíos futuros que puedan surgir. Para el proceso de análisis, se evaluarán la experiencia en el aula y los resultados obtenidos durante los (...) tres cursos académicos en los que se ha implantado este nuevo modelo en uno o varios de sus escenarios. (shrink)

We study the intersection number of families of tall ideals. We show that the intersection number of the class of analytic P-ideals is equal to the bounding number ${\mathfrak{b}}$ , the intersection number of the class of all meager ideals is equal to ${\mathfrak{h}}$ and the intersection number of the class of all F σ ideals is between ${\mathfrak{h}}$ and ${\mathfrak{b}}$ , consistently different from both.

In this paper I introduce the theory of gift giving as a possible means to reconcile the contradictions inherent in accountability measures of ‘faculty productivity’ in the American university. In this paper I sketch the theory of gift economies to show how, given the historical ideals that characterize the faculty‐student relationship, a theory of gift giving could help us better judge the labor of the faculty. I suggest that it is the relational character of teaching that frustrates accountability measures and (...) that perhaps if viewed as a gift economy—and in particular an economy with ‘reproductive’ ends—we could better grasp the effectiveness of these relationships. (shrink)

In this paper I introduce the theory of gift giving as a possible means to reconcile the contradictions inherent in accountability measures of ‘faculty productivity’ in the American university. In this paper I sketch the theory of gift economies to show how, given the historical ideals that characterize the faculty‐student relationship, a theory of gift giving could help us better judge the labor of the faculty. I suggest that it is the relational character of teaching that frustrates accountability measures and (...) that perhaps if viewed as a gift economy—and in particular an economy with ‘reproductive’ ends—we could better grasp the effectiveness of these relationships. (shrink)

The scientific study of consciousness emerged as an organized field of research only a few decades ago. As empirical results have begun to enhance our understanding of consciousness, it is important to find out whether other factors, such as funding for consciousness research and status of consciousness scientists, provide a suitable environment for the field to grow and develop sustainably. We conducted an online survey on people’s views regarding various aspects of the scientific study of consciousness as a field of (...) research. 249 participants completed the survey, among which 80% were in academia, and around 40% were experts in consciousness research. Topics covered include the progress made by the field, funding for consciousness research, job opportunities for consciousness researchers, and the scientific rigor of the work done by researchers in the field. The majority of respondents (78%) indicated that scientific research on consciousness has been making progress. However, most participants perceived obtaining funding and getting a job in the field of consciousness research as more difficult than in other subfields of neuroscience. Overall, work done in consciousness research was perceived to be less rigorous than other neuroscience subfields, but this perceived lack of rigor was not related to the perceived difficulty in finding jobs and obtaining funding. Lastly, we found that, overall, the global workspace theory was perceived to be the most promising (around 28%), while most non-expert researchers (around 22% of non-experts) found the integrated information theory (IIT) most promising. We believe the survey results provide an interesting picture of current opinions from scientists and researchers about the progresses made and the challenges faced by consciousness research as an independent field. They will inspire collective reflection on the future directions regarding funding and job opportunities for the field. (shrink)

The aims of this research were twofold: first, to compare the levels of organisational harmony between family and non-family firms and, second, to study the influence of organisational harmony on family firms’ performance (profitability, longevity and group cohesion). Starting from a definition of organisational harmony as a value and considering the importance of the management of organisational values, we use the main topics indicated by the general literature (organisational climate, trust and participation) to analyse organisational harmony, as well as three (...) other topics for performance (profitability, survival and group cohesion). Results indicate that family firms have higher levels of these three qualities than non-family firms, and that the levels of trust, participation and organisational climate have a positive and significant influence on the performance of family firms. These results can be understood as a consequence of the influence of family social capital on organisational social capital and so on the performance of family businesses. From the perspective of institutionalism, the higher levels of harmony existing in family businesses are a reflection of the pressures that the owning family as an institution exercises on the organisational social capital in its companies. (shrink)

El proceso educativo sufrió un drástico cambio debido a la pandemia que padecimos a nivel mundial, tuvimos que aprender a usar las herramientas tecnológicas en la enseñanza y en el aprendizaje. Por lo que siguiendo esta tendencia planteamos la utilización de la aplicación “Física M-Lab” en su primera versión para la enseñanza de la cinemática.Como estamos en el campo de las ciencias sociales, utilizamos el diseño cuasiexperimental que nos permitió concluir en que los aprendizajes mejoraron significativamente.

The problem of knowledge evolution has received considerable attention over the years. Mainly, the study of the dynamics of knowledge has been addressed in the area of Belief Revision, a field emerging as the convergence of the efforts in Philosophy, Logic, and more recently Computer Science, where research efforts usually involve “flat” knowledge bases where there is no additional information about the formulas stored in it. Even when this may be a good fit for particular applications, in many real-world scenarios (...) different information items may be attached to formulas. For instance, when the reliability of the source of the piece of information is attached to it as a measure of some quality (e.g., strength) of the piece of information itself, or when some characteristic informs us on the desirability of the item (e.g., the potential benefit that could be obtained from it). If this type of information is available, we can use it to guide how the belief base is to be modified when new information arrives. In this work, we present a novel approach to the contraction of knowledge bases where formulas have values attached that measure some quality linked to those formulas, exploiting it to define their desirability, and uses such desirability to define which formulas need to be removed to solve conflicts. In this context, we introduce a set of properties for contraction operators by extending classic approaches. We also show how the local treatment of minimal conflicts can induce some counter-intuitive contractions, and we present a way to avoid them by considering optimal resolutions of conflicts using the additional information encoded. We show how the proposed formalization captures any contraction that is optimal under a set of features. Finally, we present a refinement based on the identification of related minimal conflicts that performs contraction in optimal ways without looking into the entire knowledge base. The approach is based on the use of the accrual of beliefs where several formulas collaboratively use their respective values to prevail in the resolution of conflicts. (shrink)

Quotatives have been studied extensively in the language of teenagers in recent years as they present distinctive features of their own that make them different in part from those used by adults in mainstream English and Spanish. However, zero quoting has not received all the attention it certainly deserves as it has not been fully probed in terms of its discourse and pragmatic functions. This corpus-based study is focused on the strategies used by British and Spanish teenagers to introduce constructed (...) dialogue without the use of a particular marked and an explicit quotative form. The results indicate that the absence of quotatives is not casual; there are some linguistic contexts that favor the existence of this type of quotatives, namely non-lexicalized and sound words, and the dramatic recreation of situations where the speaker perform new voices. The lack of quotatives also serves to involve the interlocutor more directly and in a higher degree in what is being told, and gives more self-assurance to the narrator. These tendencies apply equally to English and Spanish. The study of null/zero quotatives should go then beyond the simple reporting of an absence of a verbal mark, and should address pragmatic and interpersonal factors closely associated with the context where they occur and with the speaker’s attitude and communicative intention and purpose. (shrink)

Using narrative descriptions of the author's own lived-experience of her ethnic heritage, Martinez offers a systematic interrogation of the social and cultural norms by which certain aspects of her Mexican-American cultural heritage are both retained and lost over generations of assimilation. Combining semiotic and existential phenomenology with Chicana feminism, the author charts new terrain where anti-racist, anti-sexist, and anti-homophobic work may be pursued.

A partir de una encuesta por correo electrónico a estudiantes de Ingeniería en el SAI de la UAMA en un contexto de enseñanza remota forzado por la pandemia, se caracteriza la gestión de la docencia, desde la visión de los estudiantes, se realiza un diagnóstico de los aspectos relacionados. Es un estudio transversal con un análisis cualitativo y descriptivo de las respuestas. La gestión docente se ve afectada por factores inherentes al proceso, así como también por factores externos. Los resultados (...) obtenidos muestran que fue impactada fuertemente al realizarse el proceso totalmente vía remota especialmente, la comunicación e interacción alumno-profesor. (shrink)

En la atención médica y en la investigación en salud resulta indispensable favorecer la toma de decisiones de los pacientes y/o participantes bajo el principio de autonomía. En particular, esta capacidad, consignada en la Convención de los Derechos de las Personas con Discapacidad, se concreta mediante la detección de necesidades de asistencia, ajustes y apoyos que dan paso a una plena y efectiva capacidad de ejercicio. Las reflexiones bioéticas hechas desde la perspectiva principialista, personalista y de los Derechos Humanos ofrecen (...) elementos para potenciar la autonomía de las personas con discapacidad, promoviendo la figura de asistencia personal y enfatizando el interés superior, la gradualidad y la revisión judicial permanente como principios de figuras sustitutivas. (shrink)

Neuroconstructivism postulates the progressive complexity of mental representation over the course of cognitive development and the role of the graphic representation of movement in the transformation of mental schemas, cognitive flexibility, and representational complexity. This study aims to: understand children’s resources in the drawing of movement ; and verify whether there are differences in the graphic representation of movement as an indicator of cognitive flexibility. The participants were N = 240 children aged 5–8 years; 1,440 drawings were collected representing 2,880 (...) characters from six stories. The analysis consisted: data quality control, using the kappa coefficient, and Generalizability Theory to test the instrument’s validity and reliability; Multivariate General Analysis and Mixed Linear Analysis of the factors ; Multivariate General Analysis of the graphic components: categories and microcategories, as well as the elements that make up the macrocategories: “Static,” “Indication,” and “Movement”; and calculation of the generalizability coefficient. The results show that: age best explains variability, with a high effect size across all components, thus increasing its complexity and at ages 6 and 7, “Indication” appears as a modulator of “Static” toward “Movement”. The generalizability coefficient is optimal. It is concluded that changes in the initial graphic representation of movement may interactively transform mental representation, thus increasing cognitive flexibility and prompting teaching applications to optimize such changes. (shrink)

For the period 2015–2019 and based on a Spanish sample of 145 listed companies, this paper provides insights into how narcissistic chief executive officers (CEOs) influence the proportion of women in top management teams (TMTs). As a further analysis and in line with social psychology and upper echelons theories, we study whether the power and gender of a CEO and the female proportion in the firm's board moderate the relationship. Our results reveal that narcissistic CEOs are less likely to support (...) women in TMTs, confirming that CEO personality traits influence team structure. Further results suggest that this aversion increases as the CEO's power grows and is a woman, and when female proportion in board decreases. The results have an impact on the gender equality goal, demonstrating that the behavior of women toward promoting gender equality in TMTs depends both on the specific position of women in the firm's hierarchy and on their personal psychological attributes. We find that women directors support social identity values and that narcissistic female CEOs act like queen bees. (shrink)

The strict lockdown experienced in Spain during March–June 2020 as a consequence of the COVID-19 crisis has led to strong negative emotions. Music can contribute to enhancing wellbeing, but the extent of this effect may be modulated by both personal and context-related variables. This study aimed to analyze the impact of the two types of variables on the perceived efficacy of musical behaviors to fulfill adults’ emotional wellbeing-related goals during the lockdown established in Spain. Personal variables included age, gender, musical (...) training, personality, resilience, and perception of music’s importance. Contextual variables referred to living in a region with a high COVID-19 impact, perception of belonging to a risk group, being alone, having caring responsibilities during confinement, and amount of time of music listening as compared to prior to the crisis. The study was conducted retrospectively during August–December 2020, when the strict lockdown was over in Spain. An online survey was disseminated among the general population and groups of musicians, and the answers of 507 adults were analyzed. Only personal, but not COVID-19 context-related variables, showed an impact on music’s efficacy. The youngest age group of adults and those with musical training reported the highest efficacy of music for wellbeing enhancement, and music’s importance was found to be the main significant predictor of music’s perceived efficacy. Our findings suggest that the people who have been reported to be emotionally more vulnerable during the lockdown, due to either a strong impact on their daily lives or their lower resilience, perceive a higher benefit from musical behaviors. Being musically trained, even for a small number of years, also leads to a perception of higher efficacy of music for the achievement of emotional wellbeing goals. However, this effect is explained by the musically trained individuals’ higher perception of music’s importance. Although musical behaviors can be generally considered as important for wellbeing enhancement, our study highlights who are the potential individuals who could benefit the most from music-related activities for obtaining better levels of wellbeing, at least within the current context of the COVID-19 crisis. (shrink)

Introduction: The Binge Eating Scale (BES) is a widely-used self-report questionnaire to identify compulsive eaters. However, research on the dimensions and psychometric properties of the BES is limited. Objective: The aim of this study was to examine the properties of the Spanish version of the BES. Method: Confirmatory Factor Analyses (CFAs) were carried out to verify the BES factor structure in a sample of Spanish college students (N = 428, 75.7% women; age range = 18–30). An invariance measurement routine was (...) carried out across sexes, the latent means were compared, and estimates of reliability and convergent and discriminant validity were presented. Results: A one-factor model fit the data best and was also equivalent between sexes. The scalar invariance model showed statistically significant differences across sexes, with a higher prevalence in women. Regarding reliability, the results were excellent. Finally, high statistically significant correlations were obtained with other measures of binge eating (BE), food addiction, impulsivity, binge drinking, and body mass index (BMI). Conclusions: The Spanish 16-item BES is a valid and reliable scale to evaluate BE in the youth population. (shrink)

It has become almost commonplace to recognise that teaching is an embodied practice. Most analyses of teaching as embodied practice focus on the embodied nature of the teacher as subject. Here, we use Butler's concept of performativity to analyse the reiterated acts that are intelligible as—performatively constitute—teaching, rather of the teacher as subject. We suggest that this simultaneously helps explain the persistence of teaching as a narrow repertoire of actions recognisable as ‘teaching’, and the policing of conformity to teaching thus (...) embodied. However, like performatively accomplished subjectivity, this repertoire is unstable and ambiguous, and thus open to change and disruption. Moreover, teacher subjectivities may lead them to mobilise these possibilities of disruption. (shrink)

Natural Law is considered by many jurists an ambiguous concept. In this article we offer a concise history of ancient and mediaeval Natural Law as well as how it is present in the modern Bills of Human Rights. In the Natural Law it is convenient to distinguish what is caducous from that still valid.

The tree-based data structure of -tree for propositional formulas is introduced in an improved and optimised form. The -trees allow a compact representation for negation normal forms as well as for a number of reduction strategies in order to consider only those occurrences of literals which are relevant for the satisfiability of the input formula. These reduction strategies are divided into two subsets (meaning- and satisfiability-preserving transformations) and can be used to decrease the size of a negation normal form A (...) at (at most) quadratic cost. The reduction strategies are aimed at decreasing the number of required branchings and, therefore, these strategies allow to limit the size of the search space for the SAT problem. (shrink)

The tree-based data structure of △-tree for propositional formulas is introduced in an improved and optimised form. The △-trees allow a compact representation for negation normal forms as well as for a number of reduction strategies in order to consider only those occurrences of literals which are relevant for the satisfiability of the input formula. These reduction strategies are divided into two subsets (meaning- and satisfiability-preserving transformations) and can be used to decrease the size of a negation normal form A (...) at (at most) quadratic cost. The reduction strategies are aimed at decreasing the number of required branchings and, therefore, these strategies allow to limit the size of the search space for the SAT problem. (shrink)

This article explores the question of how scientific uncertainty can be managed in medical decision making using the Advisory Committee on Immunization Practices as a case study. It concludes that where a high degree of technical consensus exists about the evidence and data, decision makers act according to a clear decision rule. If a high degree of technical consensus does not exist and uncertainty abounds, the decision will be based on a variety of criteria, including readily available resources, decision-process constraints, (...) and the available knowledge base, among other things. Decision makers employ a variety of heuristic devices and techniques, thereby employing a pragmatic approach to uncertainty in medical decision making. The article concludes with recommendations for managing scientific uncertainty in medical decision making. (shrink)