Using a recent result of Busch and Gudder, we reconsider a theorem of Ludwig which allows one to identify a class of effect automorphisms as the symmetry transformations in quantum mechanics.

Como casi todos los conceptos fi losófi cos, el de «validez normativa» tiene altos grados de ambigüedad y de vaguedad. En este trabajo me encargo de analizar la postura de distintos autores que han tratado de dar respuesta a la pregunta ¿qué significa que una norma sea «válida»? Para ello, tomo como hilo conductor la obra de Ernesto Garzón Valdés. Esto se debe a que los trabajos de Ernesto Garzón dedicados a este tema, le ofrecen al lector un análisis crítico (...) y comprensivo de algunas de las posturas teóricas más relevantes sobre el concepto de validez normativa. Asimismo, trabajar a través de su obra tiene un doble benefi cio: por un lado, no sólo nos permite conocer a fondo la postura teórica de autores que pertenecen a distintas corrientes del pensamiento, como Hans Kelsen, H.L.A. Hart, Francisco Suárez o von Wright por ejemplo, sino que, por el otro, nos permite conocer la postura del mismo Garzón y sus críticas a los diferentes modelos conceptuales. (shrink)

Although narcissists often emerge as leaders, the relationship between leader narcissism and follower performance is ambiguous and often even found to be negative. For women, narcissism seems especially likely to lead to negative evaluations. Since narcissists have the tendency to be impulsive and change their minds on a whim, they may come across as inconsistent. We propose “inconsistent leader behavior” as a new mechanism in the relationship between leader narcissism and follower performance and argue that leader gender plays an important (...) role in whether narcissistic leaders are perceived as inconsistent. Specifically, we expect leader narcissism to have a negative relationship with follower performance through perceived inconsistent leader behavior, especially for female leaders. Thus, we examine leader gender as a personal factor moderating the relationship between narcissism and perceived inconsistent behavior. Also, as perceived inconsistency is likely less problematic when a good relationship exists, we examine leader–member exchange as a contextual condition moderating the relationship between leader behavior and follower performance. We test our moderated mediation model in a multi-source study with 165 unique leader–follower dyads. As expected, leader narcissism was positively related to perceived inconsistent leader behavior, and this relationship was stronger for female leaders. Inconsistent leader behavior was negatively related to follower performance, but only when LMX was low. Our research highlights that perceived behavioral inconsistency can be problematic and—for female leaders—provides an explanation of the negative relation of leader narcissism with follower performance and of the inconsistencies in evaluations of narcissistic leaders’ effectiveness. (shrink)

In human groups performing oscillatory tasks, it has been observed that the frequency of participants' oscillations reduces when compared to that acquired in solo. This experimental observation is not captured by the standard Kuramoto oscillators, often employed to model human synchronization. In this work, we aim at capturing this observed phenomenon by proposing three alternative modifications of the standard Kuramoto model that are based on three different biologically-relevant hypotheses underlying group synchronization. The three models are tuned, validated and compared against (...) experiments on a group synchronization task, which is a multi-agent extension of the so-called mirror game. (shrink)

This article represents the genre of auto-ethnographic, autobiographical research. It consists of questions which evoke narrative responses because the questions register a life story in itself. Pieter G.R. de Villiers is the interpellator and Andries G. van Aarde the respondent. They are long-standing friends and both professors of New Testament studies. De Villiers is presently the editor at LitNet Academic (Religious Studies), and Van Aarde is the editor of HTS Theological Studies. Since 1990, De Villiers has been Executive Director of (...) the Centre for Christian Spirituality and Ethics and has been a Research Fellow and Professor Extraordinarius in Biblical Spirituality at the Department of Old and New Testament Studies at the Faculty of Theology, University of the Free State (since 2001).Contribution: The article reflects a conversation between Andries G. van Aarde and Pieter G.R. de Villiers. It contributes to an understanding of contemporary South African church history, including the protest by academics in Afrikaans ecclesial circles against apartheid and gender injustice. (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)

A novel and versatile polarization-entanglement scheme is adopted to investigate the violation of the EPR local realism for a non-maximally entangled two-photon system according to the recent “nonlocality proof” by Lucien Hardy. In this context the adoption of a sophisticated detection method allows direct determination of any “element of physical reality” (viz., determined “with probability equal to unity” in the words of Einstein, Podolsky and Rosen) for the pair system within complete measurements that are largely insensitive to the detector quantum-efficiencies (...) and noise. (shrink)

Gentile's philosophy merits the attention of every serious thinker, for it presents the doctrine that reality is spiritual in a more uncompromising form than is to be found elsewhere, and claims to solve on this principle all the great problems that have beset the history of metaphysic. His own name for it is Absolute or Actual Idealism . For Gentile, nothing is real but the Spirit, and by the Spirit he means the pure act of self-conscious thinking. “The subject that (...) conceives itself in conceiving All is the reality itself.” In the act of conscious thinking, the Spirit is present in its entirety as subject ; generating therein by its own creative spontaneity a world of objects, and resolving the products of this act of objectification into the womb that gave them birth. In this immanent dialectic–pure subject , pure object , subject-object –lies the rhythmic life-history of the Spirit. “Our doctrine,” writes Gentile, “is the theory of the Spirit as act which posits its object in a multiplicity of objects, resolving their multiplicity and objectivity in the unity of the subject itself.” For such a doctrine, transcendence is the enemy, the Goliath whom Gentile has gone forth to slay. He confronts us, on almost every page of his writings, with an ineluctable dilemma. Either a philosophy of sheer immanence, or reality is unknowable. (shrink)

This phenomenological study intends to capture and describe Filipino college deans’ lived experiences of ethical dilemmas as they carry out their work as administrators. Using semistructured in-depth interviews and following Collaizzi’s method, data was collected and subjected to cool and warm analyses yielding a set of themes and sub-themes that typify what these deans consider to be ethical dilemmas. The resulting ‘Wheel’ of School Leaders’ Ethical Dilemmas depicts the nature of the dilemmas faced by these deans, the critical incidents which (...) trigger the onset of the dilemmas, and the value conflicts that are embedded in them. This article intends to add to the growing body of research on ethical decision making in educational management, particularly on the ethical dilemmas faced by Filipino college deans. At a practical level, the findings of this study provide valuable resource to assist practicing and aspiring deans to be more adept in identifying the moral and ethical dimensions of their work as academic administrators. Finally the findings of this study could serve as a knowledge base for curriculum planners in designing ethics courses offered in educational leadership programs in the Philippines to develop academic leaders’competencies and skills in ethical decision making. (shrink)

The chapter reports on the findings of a grounded theory study on the moral sensitivity practice of Filipino college deans. It centers on the exposition of a conceptual model which expands the construct of moral sensitivity beyond the initial stage of moral problem recognition and depicts three processes of knowing facts, understanding people, and understanding oneself as fundamental processes to moral sensitivity. A set of seven distinct practices were also identified as subcomponents of moral sensitivity. The chapter concludes by highlighting (...) the level of complexity involved in moral problem identification in real-life settings and the consequent need for developing administrators’ moral sensitivity skills through formal courses in ethics as part of school administrator preparation programs. (shrink)

This article aims to discuss the concepts of natural right and property in Bodin's Iuri distributio universi and the political consequences of these ideas in Methodus ad facilem historiarum cognitionem and Les Six Livres de la République .Este artigo pretende discutir os conceitos de direito natural e propriedade no Iuri universi distributio e as suas conseqüências políticas no Methodus ad facilem historiarum cognitionem e no Les Six Livres de la République , de Jean Bodin.