Los instrumentos empleados para la recogida de información aportan la información para evaluar si se han logrado las competencias previstas en un plan formativo. Por ello, conocer cómo entienden y describen los estudiantes las capacidades y destrezas que están demostrando en ellos, es una información a tener en cuenta en momentos de cambio y reestructuraciones de los planes de estudio. En este artículo mostramos los resultados obtenidos en una investigación, en la que los estudiantes describen qué implica cada una de (...) las técnicas de evaluación que han realizado a lo largo de sus estudios de licenciatura y qué destrezas debían emplear en cada una de ellas. Con la información recogida, hemos intentado organizar las tipologías de instrumentos de recogida de información con las capacidades desarrolladas desde las percepciones de los estudiantes, presentando un continuo de habilidades cognitivas. (shrink)

Con una indagación cualitativa se intenta averiguar si el método de palabras generatrices de Paulo Freire presenta ventajas para la enseñanza-aprendizaje de la lengua escrita castellana en la edad infantil. Se extraen los datos de la experiencia práctica acumulada por profesorado que lo ha aplicado en el segundo ciclo. Cinco maestras aportan informes escritos individuales y dos equipos docentes se constituyen en grupos de discusión. Tras la categorización y análisis de los datos, se concluye que el método tiene muchas ventajas. (...) Entre las ventajas de tipo didáctico cabe resaltar el respeto al protagonismo del alumnado y a su pensamiento sincrético, ser muy motivador, conseguir la comprensión lectora desde el principio, desarrollar simultáneamente las conciencias léxica, silábica y fonológica; enriquecer el vocabulario, fijar una ortografía correcta, integrar todos los ámbitos de conocimiento, y desarrollar la capacidad simbólica y la creatividad. Como ventajas de tipo pedagógico: considerar los efectos de tipo actitudinal que actúan sobre los procesos cognoscitivos, adaptarse a los contextos, permitir al profesorado conocer mejor a su alumnado, propiciar el desarrollo de la dimensión afectivo-emocional, favorecer la socialización por trabajarse siempre en grupo y la ayuda entre iguales, el buen clima de aprendizaje y la colaboración familiar. (shrink)

Parks and town squares can play an important role by offering spaces for cognitive restorativeness in urban contexts. Therefore, it is important that these spaces be designed in a way that encourages restorativeness. Indeed, their perceived quality should motivate users to stay and take advantage of them. Yet, it is not clear whether perceptions as to the quality of these spaces is relevant in promoting restorativeness. Thus, the aim of this study is to analyze whether elements of environmental quality perceived (...) by users of public spaces favor restorativeness both in parks and squares. Environmental and social aspects are taken into consideration, since restorative experiences involve cognitive and physiological recovery, as well as a component of interaction with the environment. In this research, 519 users of 32 urban public spaces—town squares and parks—on the island of Tenerife participated. Participants evaluated these spaces using four dimensions that focused on spaces’ perceived environmental quality: design of spaces, care of spaces, social interaction, and presence of sensorial elements. Additionally, we evaluated the perceived restorativeness of each space. The results showed that the design of spaces, care of the spaces, social interaction, and presence of sensorial elements explain the variance in perceived restorativeness, although with different weights for parks and squares. We found that perceived quality of a space is a key predictor of its restorativeness. This means that maintaining parks and town squares is a relevant task given that they contribute to reducing cognitive overload, increasing sustainability, and facilitating health care in urban settings. (shrink)

One of the measures adopted by the government of Spain during the COVID-19 pandemic has been the elimination of face-to-face classes in all universities, requiring that all teachers had to conduct their classes in an online mode. The objective of this article is to study how this adaptation among university teachers affected their job performance due to the technostress (objective and subjective) that they may have suffered. Based on the person-environment misfit theory (P-E fit theory), the sample consisted of 239 (...) teachers from face-to-face and online universities in Spain who were asked to identify the type of technostress, feelings of technostress, and impact on job performance as a result of online teaching due to the COVID-19 pandemic. Results show that teachers who suffered the most from the negative consequences of technology have been female teachers from face-to-face universities who are older, have more years of experience, and consequently, hold a higher position. Despite previous results none of the above variables have been significant in explaining the decline in job performance during confinement. It was also observed that although the effect on job performance was similar for online teachers as well as face-to-face teachers, the variables that explained this effect were different. For the online teachers, there was a misfit between the demands and resources, which are explained based on the previous theory (P-E fit theory). Teachers from face-to-face universities pointed to the lack of instructions from their organization, along with subjective feelings of techno-inefficacy, as the reasons behind the decline in job performance during the lockdown period. Looking ahead to future research on the incorporation of information and communications technology in teaching work, it is necessary to consider variables associated with technostress, both objective and subjective, in order to increase the effectiveness of integrating emerging technology into teaching work. (shrink)

En este artículo examino la noción de amor a Dios (amour envers Dieu) en Descartes, conectándola con los principios metafísicos de su sistema y con los objetivos a los que da respuesta, y mostrando sus beneficios para la vida de todo hombre. Los desacuerdos de Spinoza en esta materia no constituyen una discrepancia menor, sino que adquieren relevancia sistémica desde el momento en que el amor Dei está conectado con nociones centrales de su filosofía, como la idea de Dios y (...) sus atributos, la relación del hombre con la sustancia infinita, la actividad mental-corporal, el conocimiento como expresión del deseo, la función liberadora de los afectos y la fruición del amor a Dios. Esta noción constituye una plataforma privilegiada para examinar las peculiaridades de los sistemas de Descartes y Spinoza, y deja ver notables diferencias en sus respectivos proyectos de naturalización de la realidad. (shrink)

Social entrepreneurship (SE) enables business consolidation, combined with the production of positive impact and improvements in society. Aligned with 2030 Agenda for the achievement of the United Nations Sustainable Development Goals, it is important to clarify the role of social entrepreneurs, as they are making visible the impact of their creative ideas in several areas, from civic engagement to the environment, health and learning. The main purpose of this study is to specify a model of social entrepreneurial intention (SEI) and (...) explore it by country, based on the dimensions of the Theory of Planned Behavior and how these are mediated by spirituality and optimism. With a convenience sample of 1476 Portuguese and Spanish students, Structural Equation Modeling (SEM) was used. For a deeply understanding, variables within the model were compared by country usingt-rest, and multivariate analysis was done by each one separately. The mean comparison between countries, demonstrated that there are differences only between perceived behavioral control (PBC), Spirituality, Optimism and SEI, with Portuguese students scoring the highest values, in all variables except Optimism. A mediation path was carried out, and Spirituality mediate a significant effect between the three TPB dimensions in Portuguese students, but not in students from Spain. Finally, after discussing the results, theoretical and practical contributions are analyzed, with regard to the field of SE in Portugal and Spain, and alternatives are pointed out for a more social and sustainable entrepreneurial future. (shrink)

Este artículo examina las medidas adoptadas por el Gobierno de Colombia para atender las necesidades de la población diagnosticada con coinfección de los virus de inmunodeficiencia humana (VIH) y de hepatitis C (VHC), inclusive las personas privadas de la libertad, y de esa manera garantizar su derecho fundamental a la salud. Para verificar tales acciones, se realiza una revisión de las guías elaboradas por el Ministerio de Salud y Protección Social y la Cuenta de Alto Costo, en las que se (...) aborda el panorama de estas enfermedades, así como los mecanismos legales para acceder al tratamiento. Los hallazgos indican que, si bien el Sistema de Salud en Colombia no es excelente, lo cierto es que se evidenció la gestión de los últimos gobiernos para implementar una política de prevención de tales enfermedades, así como, para destinar mayores recursos públicos que permitan una adecuada satisfacción de las necesidades sanitarias de este grupo vulnerable. (shrink)

Primary progressive aphasia is a clinical syndrome in which patients progressively lose speech and language abilities. Three variants are recognized: logopenic, associated with phonology and/or short-term verbal memory deficits accompanied by left temporo-parietal atrophy; semantic, associated with semantic deficits and anterior temporal lobe atrophy; non-fluent associated with grammar and/or speech-motor deficits and inferior frontal gyrus atrophy. Here, we set out to investigate whether the three variants of PPA can be dissociated based on error patterns in a single language task. We (...) recruited 21 lvPPA, 28 svPPA, and 24 nfvPPA patients, together with 31 healthy controls, and analyzed their performance on an auditory noun-to-verb generation task, which requires auditory analysis of the input, access to and selection of relevant lexical and semantic knowledge, as well as preparation and execution of speech. Task accuracy differed across the three variants and controls, with lvPPA and nfvPPA having the lowest and highest accuracy, respectively. Critically, machine learning analysis of the different error types yielded above-chance classification of patients into their corresponding group. An analysis of the error types revealed clear variant-specific effects: lvPPA patients produced the highest percentage of “not-a-verb” responses and the highest number of semantically related nouns ; in contrast, svPPA patients produced the highest percentage of “unrelated verb” responses and the highest number of light verbs. Taken together, our findings indicate that error patterns in an auditory verb generation task are associated with the breakdown of different neurocognitive mechanisms across PPA variants. Specifically, they corroborate the link between temporo-parietal regions with lexical processing, as well as ATL with semantic processes. These findings illustrate how the analysis of pattern of responses can help PPA phenotyping and heighten diagnostic sensitivity, while providing insights on the neural correlates of different components of language. (shrink)

In case of special engineering projects of important relevance it is interesting to pay attention to several possible risks; some of them are in the field of morality or ethics. Due to the social importance of these risks, additional considerations or even additional warranties are justified.

El sufrimiento existencial en el paciente oncológico en estadio avanzado: dimensiones y ejes vertebradores para la intervención psicológica Sofrimento existencial no paciente oncológico em estágio avançado: dimensões e eixos vertebrais para intervenção psicológica The relief of existential suffering in the patients with adavanced cancer is a first-order therapeutic goal. The present work suggests some axis on which psychotherapeutic intervention could be developed, in order to facilitate in these patients: 1) The experience of: In spite of the "existing" limited situation, one's (...) life "still" has meaning, 2) Positive emotional experiences that promote well-being and quality of life, and 3) Face the serious illness that will cause one's almost imminent death, through the development of a serene, reconciled attitude with life and integrating with oneself and the others. Para citar este artículo / To reference this article / Para citar este artigo García-Alandete J, Hernández-Jiménez MJ. El sufrimiento existencial en el paciente oncológico en estadio avanzado: dimensiones y ejes vertebradores para la intervención psicológica. pers. bioét. 2018; 22: 319-330. DOI: 10.5294/pebi.2018.22.2.9. (shrink)

La Psicología de la Sustentabilidad (PS) estudia las problemáticas hídricas considerando la relación entre disponibilidad per cápita y consumo de agua. A partir de conceptos tales como; densidad poblacional, infraestructura hídrica y provisión de agua plantea tres estilos de vida relativos al almacenamiento de agua, la reparación de fugas y el consumo hídrico. La PS advierte que las relaciones causales entre las problemáticas hídricas y los estilos de vida son relevantes si se considera el Desarrollo Local Sustentable más que regional (...) y global. A medida que las problemáticas hídricas se intensifican, procesos actitudinales y de austeridad prevalecen sobre el dispendio de agua. En contraste, las situaciones hídricas en equilibrio con el consumo residencial facilitan el dispendio. La discusión alusiva a las problemáticas hídricas y los estilos de vida permitirá construir un sistema tarifario de consumo y delimitar las políticas públicas que se requerirán en el marco de la crisis de abastecimiento y distribución que se espera en los próximos años. (shrink)

The participation of families in schools where their children study is a recurring research topic. This field tends to address the perception of parents or teaching staff. This work is novel in that it considers what teachers, and not families, do to facilitate this participation. The purpose of this work has been to contrast a theoretical model with a multidimensional questionnaire designed to obtain information on the assistance provided by teachers to improve parental involvement in schools. It will allow us (...) to lay the foundations for the content necessary for the initial and permanent training of teachers. Then, an initial questionnaire was created and, after being subjected to expert judgment, it was applied to 225 Spanish teachers, using a quantitative and a non-experimental methodology. After calculating the exploratory and confirmatory factor analysis and applying the structural equation model, a questionnaire was obtained that had satisfactory construct validity and reliability. (shrink)

A course in professional ethics for civil engineers was taught for the first time in Spain during the academic year 2007/08. In this paper a survey on the satisfaction and expectation of the course is presented. Surprisingly the students sought moral and ethical principles for their own ordinary lives as well as for their profession. Students were concerned about the law, but in their actions they were more concerned with their conscience, aware that it can be separate from the law.

Universities increasingly play an important role in entrepreneurship, which has contributed to gender equality in the business world. The aim of this study is to establish a causal model of entrepreneurial intentions and explore it by gender, based on the dimensions of the Theory of Planned Behavior, and how these are mediated by the individuals’ resilience and psychological well-being. The previous work experience was considered as one of the control variables, in order to analyze whether this influence the entrepreneurial intention. (...) With a convenience sample of 644 Portuguese students, Structural Equation Modeling was used. For a better understanding, multivariate analyses were performed and each one was individually reported, and for appropriate comparisons by gender, the t-student test was used. The comparison of means, between genders, showed that there are differences only between perceived behavioral control, subjective norm, and entrepreneurial intention, with women scoring the highest values, and psychological well-being, with men scoring the higher. A serial mediation path was performed, and psychological resilience was found to mediate a significant effect between perceived behavioral control and intention in females, but not in males. It also mediates a significant effect between attitude and intention in females, but not in males. These results show that attitude is a determining factor for females to become entrepreneurs. Finally, after discussing the results, theoretical and practical contributions are analyzed, with regard to the field of entrepreneurship in Portugal, and alternatives are pointed out for a more entrepreneurial future, reinforcing the role of higher education institutions. (shrink)

: In recent years, research on the family role and entrepreneurship has increased extremely, consolidating itself as a valid and current subject of study. However, a part of the scientific literature seems to lack systematization and the boundaries appear unclear, maybe due to its multidisciplinary nature. This paper presents a systematic analysis of academic research, applying bibliometric indicators and cluster analysis, which define the state of research on the international scene. For this purpose, using three well accepted databases among the (...) research community: Scopus, Web of Science, Business Source, a total of 92 articles were selected and analyzed, published between 1989 and 2019 (until March). The results show that this is a relatively recent field of study, with a multidisciplinary character and in which the most influential authors do not coincide with the most productive scientific journals. A cluster analysis finds out five main areas of literature development: the cluster with the largest percentage of co-occurrences (25%) is the one that relates to the dimensions of entrepreneurship, self-employment and personality; in contrast, the area with a lower percentage of co-occurrences of keywords (12,1%) is refers to family business, succession, economic development and Arabia Saudita. Based on the outcome obtained and the shortcomings above, in the final part of the article, possible points of reflection for future research are exposed, which could be useful to further of this field of study. (shrink)

In recent years, the study of women entrepreneurship has experienced great growth, gaining a broad consensus among academics and contributing above all to understanding all those factors that explain the difficulty of women in undertaking an entrepreneurial career. This document tries to contribute to the field of study, thanks to a systematic analysis through the publications present in the topic. For this purpose, 2,848 peer-reviewed articles were analyzed, published between 1950 and 2019, using the Scopus database (SCImago Research Group). Through (...) the use of a series of bibliometric indicators it was possible to define the current state of research on the international scene. The analysis revealed that it is a multidisciplinary field of study and that has started to expand further since 2006, culminating in 2019, which makes it become a current and valid object of study. The analysis of the clusters allowed to isolate 6 different lines of research in which emerged, on the one hand, the importance of entrepreneurial education, social entrepreneurship and the socio-cultural context of reference (e.g. culture, family and institutional support) as tools to overcome the gender gap, on the other, the importance that women entrepreneurship assumes in the economic growth of the country (especially in developing economies), promoting social inclusion and combating poverty and discrimination. The study presents an important contribution to reflect on current policies and to outline future lines of investigation. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Knock at the Door: Utopian Dreams for Post-Covid TimesPedro Mora-Ramírez, María Amo-Hernández, and Paula García-RodríguezAnswering the Knock at the Door, Welcoming Utopian Futures, The Knock at the Door: Utopian Dreams for Post-Covid Times, May 21–24, 2023, University of Huelva, Spain, and University of Calgary, CanadaThe COVID-19 pandemic has fostered new adversities and vulnerabilities, prompting reflection on the economic, social, and political paradigms that endanger human (...) and nonhuman lives. For many, it was anxiety and uncertainty that “knock[ed] at the door”; for others, however, those same feelings of unease prompted one of hopefulness: reflecting on the possibilities for resilience and regeneration in the process of changing our vision of the world.1 The Knock at the Door conference brought contemporary utopianism to the forefront of thinking about how to respond to global crises while remaining attentive to other adversities of daily life. Scholars and artists answered the knock in an attempt to examine paths toward utopia, and to take advantage of the regenerative and resilient potential of the present.The conference was the culmination of author/activist Larissa Lai’s fellowship period at the University of Huelva. The 2022–23 María Zambrano Fellowship for the academic year2 allowed Lai to complete the project “Utopian Dreams for Post-Covid Times,” carried out in collaboration with the Huelva research group led by Professor Pilar Cuder-Domínguez, who hosted a number of online and in-person seminars on speculative fiction with Lai. The Knock at the Door conference, marking the end of Lai’s fellowship, created yet another space for scholars, artists, and critics to discuss the potential of utopian narratives. Lai asks: “What does our cultural moment require, and how can we get where we need to go from where we are? How can literature, especially speculative fiction literature, help us get from here to there?”3 [End Page 641] The intention of the conference was to encourage others to continue Lai’s work on how to imagine futures where human and posthuman beings need to remain vigilant to adversities. Utopian scholars, among others, might find the complications of “getting there from here” closely related to Lai’s conception of “insurgent utopias,” or “emergent insurgency.” They could find Lai’s concept of “insurgent utopianism” interesting as it lays the foundations of futurity in terms of crisis responses.The aim of the conference was to explore the imagination of better futures through utopian thinking and practice. In addition, it focused on “the knock at the door,” which is “a moment of contingent arrival... open to cooptation, destruction, bastardization, incorporation, death, or defusal.” Yet, it presents “the powerful possibility of critique—narratively or discursively, in its very materiality.”4 One way of doing this might be to look back at the past century of utopianism and ask who or what has been missing. The conference took up Lai’s idea of insurgent utopianism as a method of paving a path toward a multitude of dreams and actions, all shaped by the unique circumstances of one’s positionality.After the COVID-19 pandemic, the need for utopian thinking has become more pressing than ever. New horizons of hope must be created in the face of emerging anxieties. In a world where anthropocentrism is showing signs of its deadly potential, conference participants reflected on the relevance of the utopian imagination to political resistance and resilience building.Utopian Visions: Contesting Better Worlds in Neoliberal and Feminist UtopiasThe first two panels of the conference addressed the critique of two dominant theoretical (and interrelated) frameworks: capitalism and neoliberalism. Speakers reflected on both in light of theoretical interventions by theorists Rosi Braidotti and Francesca Ferrando. Panelists Benjamin Ghan and Marc Lynch reflected on how creative writers envision ideal worlds and temporalities. In Ghan’s view, utopian narratives create a symphony of voices historically excluded from the category of “the human”: women; LGBTQ+ people; Indigenous peoples. In a similar vein, Lynch described his own novel, A Wasp’s Waist, as highlighting the impossibility of imagining utopias within the capitalist paradigm—and thus the necessity of imagining futures beyond capitalism, and beyond... (shrink)

The theory of separation assumes, with provocation, that an organization cannot reconcile profits and social function. Organizations can reconcile these two, apparently contrasting, missions, by considering emotions, especially moral emotions, to create a genuine motivation for focusing on goals beyond simple economic earnings and protecting organizations or groups of people from dysfunctional attitudes and behaviors, as well as considering the important role of the stakeholder accountability. Using the PRISMA method, we created a review of records using keywords relating to a (...) socio-emotional value within organizations, with a particular focus on the last 20 years. We used the SCOPUS database and, after removing irrelevant records, we used the VOSviewer tool to create a cluster map of different areas in this topic. Some records cite the socio-emotional value that is related to organizational and employee suffering, while other articles consider it a positive factor that improves performance and prevents problems in organizations. (shrink)

Background: The prevalence of anxiety and depression in young students is associated with biosocial factors and scholastic stress. However, few studies have evaluated emotional-affective symptoms that are related to the immune system and antioxidant parameters in young individuals without diagnoses of affective disorders.Aim: This study aims to assess the relationship between emotional-affective symptoms and glutathione concentrations and CD4 and CD8 lymphocyte counts in college students.Methods: College students completed standardized psychometric instruments, including the Perceived Stress Scale, Hamilton Anxiety Scale, Beck Depression (...) Inventory, Familiar Social and Friends Support Scale, and Rosenberg Scale. Blood samples were biochemically analyzed. Analyses of variance were conducted between four groups according to symptom severity.Results: A considerable prevalence of stress, anxiety, and depression symptoms was observed and negatively correlated with self-esteem and socio-familiar support. Perceived stress was sexually dimorphic. Although biochemical parameters were within reference ranges, glutathione, CD4, and CD8 tended to be lower in participants with anxiety and depression symptoms, which may be of predictive value.Conclusion: The relationship between antioxidant/immune parameters and socio-affective scores is latent in undiagnosed college students who might develop affective disorders. The findings suggest that during the initial development of affective disorders, stress management strategies should be implemented to help college students cope with the academic load and monitor negative changes in their physiological state. (shrink)

ObjectiveTo investigate the association of pre-existing migraine in patients hospitalised and who recovered from severe acute respiratory syndrome coronavirus 2 infection with the presence of post-coronavirus disease symptoms.BackgroundNo study has investigated the role of migraine as a risk factor for development of post-COVID symptoms.MethodsA case-control study including individuals hospitalised during the first wave of the pandemic was conducted. Patients with confirmed previous diagnosis of migraine were considered cases. Two age- and sex-matched individuals without a history of headache per case were (...) also recruited as controls. Hospitalisation/clinical data were collected from hospital medical records. Patients were scheduled for a telephone interview. A list of post-COVID symptoms was systematically evaluated, but participants were invited to freely report any symptom. The Hospital Anxiety and Depression Scale and the Pittsburgh Sleep Quality Index were used to assess anxiety/depressive symptoms and sleep quality. Multivariable conditional logistic regression models were constructed.ResultsOverall, 57 patients with confirmed diagnosis of migraine and 144 non-migraine controls who had recovered from COVID-19 were assessed at 7.3 months after hospital discharge. The number of post-COVID symptoms in the migraine group was significantly greater than in the non-migraine group. Fatigue was significantly more prevalent in the migraine group. However, no between-groups difference in the prevalence of headache as a post-COVID symptom was detected.ConclusionPatients with a history of migraine who recovered from COVID-19 exhibited more long-term fatigue as post-COVID sequelae than those without migraine. Some of the pathophysiological changes associated with migraine could predispose to the occurrence of post-COVID symptoms. (shrink)

Testimonio que recoge algunas experiencias y reflexiones de la artista visual costarricense María Rapela en Alemania y de cómo se involucró en la gestión cultural, coordinando el Fieber Festival, una plataforma colaborativa y auto-gestionada de mujeres artistas migrantes iberoamericanas en Berlín entre el 2011 y el 2017.

The article explores the living legacy of Carla Lonzi for Italian feminism. In so doing, it highlights some key contributions made by Lonzi, in particular focussing on the necessity of taking leave of patriarchy (thanks to the invention of self-awareness), the critique of the universal (beyond the false alternative between female identity and equality with man), and the dogma of the heterosexual couple and clitoral pleasure.

This article provides an intellectual history of the status of wage earners as conceptualized within the natural law paradigm by European writers both on the Continent and in Britain. Historians of political discourse have mostly investigated the consequences of such a status for the political rights of labourers. This article shows that the crucial moves were made by different authors analysing the relation of servant to master either in the domestic sphere or in private contracts. The article further contends that (...) that resulting deeply ambiguous analyses implied a far from complete personal freedom for wage earners. This had a decisive impact on different visions of commercial society in early modern times, and left a significant legacy for moderns. ☆ Apart from a few changes and some abridgment, this essay is the first chapter of my forthcoming book Vite da servi. Figure del lavoro salariato dalla giurisprudenza naturale all’economia politica (Servants’ Lives: Figures of Paid Labour from Natural Law to Political Economy). I am much indebted to Matthew Armistead for translating it, and to Marco Geuna and Gabriella Silvestrini for commenting on an earlier draft. (shrink)

Nota crítica sobre el libro de María Luisa Femenías (2022). Los disidentes : filósofos feministas excluidos de la memoria, Ciudad Autónoma de Buenos Aires : Galerna, 446 páginas.

In the comedies of errors, and more precisely in the comedies of double, in which two identities become confused, the characters get into paradoxical situations reigned by the principle of contradiction. The classemic relationships that are based on the criterion of subjectivity are broken due to the intervention of the character appearing as the double, for the doubled and the double can appear as one subject or as two. In fact, in the added double one + one equals one (1 (...) + 1 = 1; Sosia + Mercury = Sosia) and in the split double one equals one + one (1 = 1 + 1; Philocomasium = Philocomasium + Dicea). In the modal oppositions of the alternative class (present | absent, to be | not to be) and in the aspectual oppositions of the sequential class (to arrive – to be in) the intrasubjective nature is cancelled; in the diathetic or complementary oppositions (to give .– to receive) the intersubjective relationship gets broken. Thus, it turns out that, due to the action of the double, a character can be present and absent at the same time, be and not be the same, be in a place before arriving there or have received what another has not yet given him. (shrink)

We introduce new proof systems for propositional logic, simple deduction Frege systems, general deduction Frege systems, and nested deduction Frege systems, which augment Frege systems with variants of the deduction rule. We give upper bounds on the lengths of proofs in Frege proof systems compared to lengths in these new systems. As applications we give near-linear simulations of the propositional Gentzen sequent calculus and the natural deduction calculus by Frege proofs. The length of a proof is the number of lines (...) in the proof. A general deduction Frege proof system provides at most quadratic speedup over Frege proof systems. A nested deduction Frege proof system provides at most a nearly linear speedup over Frege system where by "nearly linear" is meant the ratio of proof lengths is O) where α is the inverse Ackermann function. A nested deduction Frege system can linearly simulate the propositional sequent calculus, the tree-like general deduction Frege calculus, and the natural deduction calculus. Hence a Frege proof system can simulate all those proof systems with proof lengths bounded by O). Also we show that a Frege proof of n lines can be transformed into a tree-like Frege proof of O lines and of height O. As a corollary of this fact we can prove that natural deduction and sequent calculus tree-like systems simulate Frege systems with proof lengths bounded by O. (shrink)