The crucial phase of speciation is argued to be the evolution of mating cross-incompatibility (prezygotic incompatibility) between the genotypes distinguishing the prospective species populations. Based on this idea, a single-locus model of speciation is presented, which is shown to be biologically plausible and may help to settle the controversy as to the biological significance of single-locus modes of speciation. The model involves three alleles, two of which characterize in homozygous state the prospective species populations and in heterozygous state their hybrids. (...) The third allele represents a mutant which is equivalent to one of the first two alleles with the exception that it inhibits mating with carriers of the third allele. This third allele is fixed in one population and immigrates into a second population which contains the mutant inhibiting matings with members of the former population. Migration in the reverse direction does not occur. Proceeding from a widely applicable concept of fitness and mating preference it is shown that postzygotic incompatibility (hybrid or heterozygote disadvantage) alone suffices to trigger evolutionary replacement of the extant mating relations in the population receiving immigrants by any arbitrary degree of prezygotic incompatibility. This corroborates Wallace's hypothesis and emphasizes the potential biological relevance of speciation by reinforcement (parapatric speciation) at single gene loci. (shrink)

When applied to a family of sets, the term differentiation designates a measure of the totality of those members which appear in only one of the sets. This basic set theoretic concept involves the formation of intersections, unions, and complements of sets. However, populations as special kinds of sets may share types, but they do not share the carriers of these types; intersections of different populations are thus always empty. The resulting conceptual dilemma is resolved by considering the joint representation (...) of members of different populations that have the same type; populations then intersect with respect to joint representation of types. Two forms of representation reflect relative and absolute characteristics of differentiation by accounting for the distributions of types as relative frequencies within populations (as is commonly done) and as absolute frequencies (including effects of population sizes on differentiation), respectively. Corresponding classes of differentiation measures are developed, and existing measures are discussed in relation to these classes. In particular, the affinity of the measurement of distances between populations and the special case of differentiation of two-population families is examined in order to distinguish between the notions of distance and differentiation. (shrink)

A measure of association is introduced that is based on a conceptual rather than a model approach in order to ensure its broad applicability. The basis of the concept involves two variables or traits and of members of a population. The association of the -state with the -state is measured by the degree to which members of given -state share their -state. This formulation yields an index of association, which is applicable to all categories of traits, including discontinuous and continuous (...) traits as well as combinations of these. Complete association of one trait with the other is equivalent to the existence of a functional relationship of the second to the first trait. Therefore, the degree of association can be understood as the closeness of the relations between two variables to a non-specified functional relationship. This feature in connection with the asymmetry of the index attests its suitability for cause-effect analyses. In fact, the conceptual approach to the measurement of association yields a conclusive method of detection and description of functional relationships between variables together with a method for quantification of the strictness of these relationships. The legitimacy of the correlation coefficient and of disequilibrium indices as measures of association is briefly addressed. (shrink)

Because of their elementary significance in almost all fields of science, measures of association between two variables or traits are abundant and multiform. One aspect of association that is of considerable interest, especially in population genetics and ecology, seems to be widely ignored. This aspect concerns association between complex traits that show variable and arbitrarily defined state differences. Among such traits are genetic characters controlled by many and potentially polyploid loci, species characteristics, and environmental variables, all of which may be (...) mutually and asymmetrically associated. A concept of directed association of one trait with another is developed here that relies solely on difference measures between the states of a trait. Associations are considered at three levels: between individual states of two variables, between an individual state of one variable and the totality of the other variable, and between two variables. Relations to known concepts of association are identified. In particular, measures at the latter two levels turn out to be interpretable as measures of differentiation. Examples are given for areas of application (search for functional relationships, distribution of variation over populations, genomic associations, spatiogenetic structure). (shrink)

The isolation principle rests on defining internal and external differentiation for each subset of at least two objects. Subsets with larger external than internal differentiation form isolated groups in the sense that they are internally cohesive and externally isolated. Objects that do not belong to any isolated group are termed solitary. The collection of all isolated groups and solitary objects forms a hierarchical (encaptic) structure. This ubiquitous characteristic of biological organization provides the motivation to identify universally applicable practical methods for (...) the detection of such structure, to distinguish primary types of structure, to quantify their distinctiveness, and to simplify interpretation of structural aspects. A method implementing the isolation principle (by generating all isolated groups and solitary objects) is proven to be specified by single-linkage clustering. Basically, the absence of structure can be stated if no isolated groups exist, the condition for which is provided. Structures that allow for classifications in the sense of complete partitioning into disjoint isolated groups are characterized, and measures of distinctiveness of classification are developed. Among other primary types of structure, chaining (complete nesting) and ties (isolated groups without internal structure) are considered in more detail. Some biological examples for the interpretation of structure resulting from application of the isolation principle are outlined. (shrink)

While evenness is understood to be maximal if all types (species, genotypes, alleles, etc.) are represented equally (via abundance, biomass, area, etc.), its opposite, maximal unevenness, either remains conceptually in the dark or is conceived as the type distribution that minimizes the applied evenness index. The latter approach, however, frequently leads to conceptual inconsistency due to the fact that the minimizing distribution is not specifiable or is monomorphic. The state of monomorphism, however, is indeterminate in terms of its evenness/unevenness characteristics. (...) Indeed, the semantic indeterminacy also shows up in the observation that monomorphism represents a state of pronounced discontinuity for the established evenness indices. This serious conceptual inconsistency is latent in the widely held idea that evenness is an independent component of diversity. As a consequence, the established evenness indices largely appear as indicators of relative polymorphism rather than as indicators of evenness. In order to arrive at consistent measures of evenness/unevenness, it seems indispensable to determine which states are of maximal unevenness and then to assess the position of a given type distribution between states of maximal evenness and maximal unevenness. Since semantically, unevenness implies inequality among type representations, its maximum is reached if all type representations are equally different. For given number of types, this situation is realized if type representations, when ranked in descending order, show equal differences between adjacent types. We term such distributions “stepladders” as opposed to “plateaus” for uniform distributions. Two approaches to new evenness measures are proposed that reflect different perspectives on the positioning of type distributions between the closest stepladders and the closest plateaus. Their two extremes indicate states of complete evenness and complete unevenness, and the midpoint is postulated to represent the turning point between prevailing evenness and prevailing unevenness. The measures are graphically illustrated by evenness surfaces plotted above frequency simplices for three types, and by transects through evenness surfaces for more types. The approach can be generalized to include variable differences between types (as required in analyses of functional evenness) by simply replacing types with pairs of different types. Pairs, as the new types, can be represented by their abundances, for example, and these can be modified in various ways by the differences between the two types that form the pair. Pair representations thus consist of both the difference between the paired types and their frequency. Omission of pair frequencies leads to conceptual ambiguity. Given this specification of pair representations, their evenness/unevenness can be evaluated using the same indices developed for simple types. Pair evenness then turns out to quantify dispersion evenness. (shrink)

T. 1. Synthese und Theorie. Trägerschichten.

In dieser Leseausgabe werden die philosophischen Schriften von Aristoteles in der heute eingeführten Abfolge präsentiert. Als Grundlage dienten die vorhandenen Bände der Philosophischen Bibliothek, wobei auf den Abdruck des griechischen Textes verzichtet wurde. Kurze Vorbemerkungen zu den einzelnen Bänden geben eine erste Orientierung, Register erschließen die einzelnen Schriften. Die Randverweise auf die Paginierung der Gesamtausgabe der überlieferten Werke Aristoteles' von Immanuel Bekker (Berlin 1831-1870), nach der üblicherweise zitiert wird, ermöglichen ein leichtes und schnelles Auffinden gesuchter Textstellen.

Tras señalar que la actual política indígena divide a la sociedad chilena en posiciones antagónicas, el artículo plantea una mirada de superación quienes la ven como una amenaza al orden institucional y a la unidad de la nación chilena, y quienes la consideran meras modificaciones cosméticas al modelo etnocida del Estado chileno. Se señala que los compromisos del Pacto de Nueva Imperial tienen niveles parciales de cumplimiento que dejan a Chile por debajo en estas materias en el concierto latinoamericano, lo (...) que ha llevado a que la relación entre el gobierno y la CONADI con el movimiento indígena está atravesada por contradicciones y conflictos difíciles de solucionar. (shrink)

Scientific medicine has been successful by ways of an ever more detailed understanding and mastering of bodily functions and dysfunctions. Biomedical research promises new triumphs, but discontent with medical practice is all around. Since several decades this has been acknowledged and discussed. The philosophical traditions of phenomenology and hermeneutics have been proposed as promising ways to approach medical practice, by ways of a richer understanding of the meaning structures of health and illness. In 2000, Swedish philosopher Fredrik Svenaeus published a (...) book where he proposes that the phenomenological hermeneutics of Martin Heidegger and also the reflections on health and illness of Hans-Georg Gadamer offer important ways to approach the nature of medicine. In particular, Svenaeus argues that the goal of medicine is to promote and restore health, and that health ought to be seen as “homelike being-in-the-world”. Unhealth, illness, consequently should be understood as a situation where a person’s “being-in-the-world” in characterized by that lack of the rhythm, balance and “tune” of everyday living that characterizes not “being at home”. In this article, Svenaeus’ position is briefly outlined. Questions are raised whether “unhomelikeness” is to be seen as a metaphor, and, if so, if it is a fruitful such. Furthermore, I discuss whether or not a discourse on health and illness in these terms may be misleading in a situation where the ontological presuppositions of Heidegger are lost out of sight and the popular understanding of health psychology predominates. I also approach the question whether Svenaeus’ assumptions may inadvertently lead us to an unjustifiably broad understanding of the tasks of medicine. It is finally concluded that Svenaeus phenomenological and hermeneutical approach is both interesting and promising. There are, however, several questions that ought to be pursued further, and the step from philosophical analysis to everyday clinical discourse may be unexpectedly long and risky. (shrink)

Die Geltung der Menschenrechte kann verteidigt werden. Wer zwischen der imperialen Behauptung, die Menschenrechte seien ein triumphales Produkt des "Westens", und der relativistischen Beteuerung, sie seien "bloss" westlich, nicht wahlen mochte, tut gut daran, die Debatte um die "affirmative Genealogie", die Hans Joas in seiner Apologie der Menschenrechte entwickelt hat, genau zu verfolgen. In "Der Westen und die Menschenrechte" plausibilisiert Joas noch einmal seinen Standpunkt und reagiert scharfsinnig auf die Debatte, die in diesem Buch durch namhafte Wissenschaftler gefuhrt wird. (...) Wer mit menschenrechtlichen Fragen zu tun hat - sei es akademisch, politisch oder in anderen Engagements - und diese gegen ihre Ideologisierung oder Relativierung in Schutz nehmen will, wird zu diesem Buch greifen mussen. Mit Beitragen von Heiner Bielefeldt, Daniel Bogner, Bernd Irlenborn, Christian Hillgruber, Hans Joas, Michael Kuhnlein, Hans Maier, Christoph Mollers, Matthias Sellmann, Ludwig Siep, Tine Stein, Jean-Pierre Wils und Rolf Zimmermann. (shrink)

ROLF KÜHN, Jean Reaidy, Michel Henry, la passion de naître : méditations phénoménologiques sur la naissance; SEBASTIAN KNÖPKER Rolf Kühn, Praxis der Phänomenologie: Einübungen ins Unvordenkliche; EVELINE CIOFLEC, Chan-fai Cheung, Kairos: Phenomenology and Photography; DENISA BUTNARU, Hisashi Nasu, Lester Embree, George Psathas, Ilja Srubar, Alfred Schutz and His Intellectual Partners; ȘTEFAN NICOLAE, Martin Endreß, Alfred Schütz; ȘTEFAN NICOLAE, Schutzian Research. A Yearbook of Lifewordly Phenomenology and Qualitative Social Science, Vol. 1/2009; BENCE MAROSAN, Csaba Olay, Hans-Georg Gadamer: Phänomenologie (...) der ungegenständlichen Zusammenhänge; ADRIAN NIȚĂ, François Jaran, La métaphysique du Dasein. Heidegger et la possibilité de la métaphysique. (shrink)

Claire Katz & Lara Trout, Emmanuel Levinas. Critical Assessments of Leading Philosophers ; Thomas Bedorf, Andreas Cremonini, Verfehlte Begegnung. Levinas und Sartre als philosophische Zeitgenossen ; Samuel Moyn, Origins of the Other: Emmanuel Levinas between Revelation and Ethics ; Pascal Delhom & Alfred Hirsch, Im Angesicht der Anderen. Levinas’ Philosophie des Politischen ; Sharon Todd, Learning from the other: Levinas, psychoanalysis and ethical possibilities in education ; Michel Henry, Le bonheur de Spinoza, suivi de: Etude sur le spinozisme de Michel (...) Henry, par Jean-Michel Longneaux ; Jean-François Lavigne, Husserl et la naissance de la phénoménologie. Des Recherches logiques aux Ideen: la genèse de l’idéalisme transcendantal phénoménologique ; Denis Seron, Objet et signification ; Dan Zahavi, Sara Heinämaa and Hans Ruin, Metaphysics, Facticity, Interpretation. Phenomenology in The Nordic Countries ; Dimitri Ginev, Entre anthropologie et herméneutique ; Magdalena Mărculescu-Cojocea, Critica metafizicii la Kant şi Heidegger. Problema subiectivităţii: raţiunea între autonomie şi deconstrucţie. (shrink)

Diese Festschrift zum 65. Geburtstag des Bonner Sinologen Rolf Trauzettel (1995) enthalt Beitrage aus Sinologie, Philosophie, Orientalistik, Religionswissenschaft und Germanistik.

Rolf KÜHN, Innere Gewißheit und lebendiges Selbst. Grundzüge der Lebens-phänomenologie ; John Wrae STANLEY, Die gebrochene Tradition. Zur Genese der philosophischen Hermeneutik Hans-Georg Gadamers ; Gisbert HOFFMANN, Heideggers Phänomenologie. Bewusstsein — Reflexion — Selbst und Zeit im Früh werk ; Dean KOMEL, Kunst und Sein. Beiträge zur Phänomenologischen Ästhetik und Aletheiologie.

This book shows how the study of multi-hadron production phenomena in the years after the founding of CERN culminated in Hagedorn's pioneering idea of limiting temperature, leading on to the discovery of the quark-gluon plasma -- announced, in February 2000 at CERN. Following the foreword by Herwig Schopper -- the Director General (1981-1988) of CERN at the key historical juncture -- the first part is a tribute to Rolf Hagedorn (1919-2003) and includes contributions by contemporary friends and colleagues, and (...) those who were most touched by Hagedorn: Tamás Biró, Igor Dremin, Torleif Ericson, Marek Gaździcki, Mark Gorenstein, Hans Gutbrod, Maurice Jacob, István Montvay, Berndt Müller, Grazyna Odyniec, Emanuele Quercigh, Krzysztof Redlich, Helmut Satz, Luigi Sertorio, Ludwik Turko, and Gabriele Veneziano. The second and third parts retrace 20 years of developments that after discovery of the Hagedorn temperature in 1964 led to its recognition as the melting point of hadrons into boiling quarks, and to the rise of the experimental relativistic heavy ion collision program. These parts contain previously unpublished material authored by Hagedorn and Rafelski: conference retrospectives, research notes, workshop reports, in some instances abbreviated to avoid duplication of material, and rounded off with the editor's explanatory notes. About the editor: Johann Rafelski is a theoretical physicist working at The University of Arizona in Tucson, USA. Born in 1950 in Krakow, Poland, he received his Ph.D. with Walter Greiner in Frankfurt, Germany in 1973. Rafelski arrived at CERN in 1977, where in a joint effort with Hagedorn he contributed greatly to the establishment of the relativistic heavy ion collision, and quark-gluon plasma research fields. Moving on, with stops in Frankfurt and Cape Town, to Arizona, he invented and developed the strangeness quark flavor as the signature of quark-gluon plasma. (shrink)

The paper tries to illustrate the influence of Aristotle's thought upon Brentano by arguing that the view that all psychological phenomena have objects was proably derived from the Aristotelian conception that the mind can know itself only en parergo, and that this knowledge presupposes that some other thing be in the mind "objectively". Brentano's contribution to Aristotle scholarship is illustrated by reviewing some of his arguments against Zeller's claim that Aristotle's God, contemplating only himself, is ignorant of the world. The (...) paper concludes with an attempt to explain the relative neglect into which Brentano's exegetical efforts have fallen. (shrink)

Abduction is considered the most powerful, but also the most controversially discussed type of inference. Based on an analysis of Peirce’s retroduction, Lipton’s Inference to the Best Explanation and other theories, a new theory of abduction is proposed. It considers abduction not as intrinsically explanatory but as intrinsically conditional: for a given fact, abduction allows one to infer a fact that implies it. There are three types of abduction: Selective abduction selects an already known conditional whose consequent is the given (...) fact and infers that its antecedent is true. Conditional-creative abduction creates a new conditional in which the given fact is the consequent and a defined fact is the antecedent that implies the given fact. Propositional-conditional-creative abduction assumes that the given fact is implied by a hitherto undefined fact and thus creates a new conditional with a new proposition as antecedent. The execution of abductive inferences is specified by theory-specific patterns. Each pattern consists of a set of rules for both generating and justifying abductive conclusions and covers the complete inference process. Consequently, abductive inferences can be formalised iff the whole pattern can be formalised. The empirical consistency of the proposed theory is demonstrated by a case study of Semmelweis' research on puerperal fever. (shrink)

Gegenstand der Nikomachischen Ethik (ca. 335-323 v. Chr.) ist das >tätige Leben.