A fixed-parameter is an algorithm that provides an optimal solution to a combinatorial problem. This research-level text is an application-oriented introduction to the growing and highly topical area of the development and analysis of efficient fixed-parameter algorithms for hard problems. The book is divided into three parts: a broad introduction that provides the general philosophy and motivation; followed by coverage of algorithmic methods developed over the years in fixed-parameter algorithmics forming the core of the book; and a discussion of the (...) essential from parameterized hardness theory with a focus on W [1]-hardness, which parallels NP-hardness, then stating some relations to polynomial-time approximation algorithms, and finishing up with a list of selected case studies to show the wide range of applicability of the presented methodology. Aimed at graduate and research mathematicians, programmers, algorithm designers and computer scientists, the book introduces the basic techniques and results and provides a fresh view on this highly innovative field of algorithmic research. (shrink)
The article deals with Kant's understanding of personhood and autonomy. It highlights the connection of autonomy and human dignity within Kant's appreciation of morality, and indicates how his distinction between the empirical and transcendental spheres enables Kant to extend dignity even to humans who are not actually autonomous. Turning to contemporary approaches within ethics that refer to Kant but omit this transcendental framework, it defends the necessity of a trans-empirical frame within the Kantian system and hints at consequences for bioethics. (...) It concludes that Kant works with neither an absolutist notion of freedom in terms of solipsistic autarky, nor an empirical freedom and autonomy that begin and end at certain points of time. (shrink)
In a seminal paper of 1923 on vagueness, Bertrand Russell discussed some of the most important problems concerning the nature of vagueness, its extension within the language, and its relation to truth and logic. The present paper inquires into Russell's theory. The following topics will be analysed and discussed in turn in sections 1?5: Russell's definition of vagueness; his claim that all phrases are vague; his theory of the source of the vagueness in our language; his principles for the transmission (...) of vagueness; and his claim that logic is incompatible with vagueness. This paper is an attempt to give a rational reconstruction of Russell's position as expressed in his paper. Compatible passages in other of his works are also studied. (shrink)
This article notes differences in legislation in Germany and Great Britain regarding human embryo research and looks for an explanation in their divergent intellectual traditions. Whereas the German Stem Cell Act invokes an anthropological concept of human dignity to ground its ban on using embryos for research, there is no definition of what it means to be human in either the British Human Fertilisation and Embryology Act or in the advisory Warnock-Report. After studying the differences and providing some philosophical background, (...) the essay distinguishes two notions that are significant for understanding human dignity. It then proposes from a theological point of view a basic understanding within a relational anthropology, and comes to the conclusion that because of continuity in development and their relational constitution, humans embryos should be accepted as human from the moment of conception. (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)
Körner's notion of vagueness, its relation to ostension and the alledged gulf between logic and experience are examined. Ostension is seen not to cause vagueness ~ there are precise concepts of mathematics which can be ostensively introduced. A distinction is drawn between classical logic not applying to the vague world and not applying to the vague language. The claims about logic and the vague world are unverifiable claims about existence. Körner's attempt to elimmate the seeming incompatibility between vague language and (...) logic leads to a Protagorean relativism which is rejected. It is denied that the incompatibility between vagueness and classical logic causes a gulf between two sublanguages; instead, ordinary language is held to contain both and so to be inconsistent. (shrink)
The Reply to Dr. Rolfs essay makes the following main points: (1) The logic of inexactness has the same syntax as Kleene's three-valued logic. Its semantics is different in that the third truth-value can by choice be correctly turned into either truth or falsehood. (2) The definition of resemblance classes includes, but is not exhausted by, ostensive rules. (3) The application of classical mathematics to sense-experience consists in the limited identification of non-isomorphic structures. (4) There are exact perceptual and vague (...) mathematical concepts. (5) The distinction between my categorial framework, a categorial framework and the true categorial framework, if any, is neither relativistic nor absolutistic. (shrink)
Combining testimonial reports from independent and partially reliable information sources is an important problem of uncertain reasoning. Within the framework of Dempster-Shafer theory, we propose a general model of partially reliable sources which includes several previously known results as special cases. The paper reproduces these results, gives a number of new insights, and thereby contributes to a better understanding of this important application of reasoning with uncertain and incomplete information.
This paper tries to show that one of the main objectives of Hegel's Phenomenology of Spirit is to give an epistemological argument for his monistic metaphysics. In its first part, it outlines a traditional, Kant-oriented approach to the question of how we can make sense of our ability to cognize objects. It focuses on the distinction between subjective and objective conditions of cognition and argues that this distinction, understood in the traditional (Kantian) way, is much too poor to do justice (...) to our very elaborated conception of kinds of objects. The second part deals with the Phenomenology. Here it is claimed that Hegel reacts in a sophisticated way to the shortcomings of the traditional epistemological view in presenting a theory which allows us to understand why we have to distinguish between different kinds of objects and how these kinds are related to conditions of cognition. This epistemological doctrine, however, is not developed by Hegel for its own sake. Rather, it has the function of a "transcendentalistic" (not "transcendental") argument for a monistic ontology. Thus, one can make sense of Hegel's claim that the Phenomenology is to be understood as an introduction into his (monistic) System. (shrink)
In a world that has become increasingly dependent upon employee ownership, commitment, and initiative, organizations need leaders who can inspire their␣employees and motivate them individually. Love, forgiveness, and trust are critical values of today’s organization leaders who are committed to maximizing value for organizations while helping organization members to become their best. We explain the importance of love, forgiveness, and trust in the modern organization and identify 10 commonalities of these virtues.
The purpose of this essay is to defend a claim that a certain consideration, which I call unworkability, is universally and necessarily relevant to legal reasoning. By that I mean that it is a consideration that must carry legal weight in the justification of some judicial decisions in every legal system in which (1) all disputed matters of law can be adjudicated, and (2) all judicial decisions are to be legally justified. Unworkability's necessary relevance has important implications for a theory (...) of relevance presented by Rolf Sartorius. On this theory, nearly all considerations that are relevant to a judicial decision are supplied by legal principles embedded in the legal rules and decisions, or by extralegal principles dependent, in some way, on the legal principles. (The exceptions to the embedding thesis that Sartorius would, no doubt, recognize are elaborated in the text but can be set aside here.) But there are possible legal systems which do not contain an embedded legal principle concerning unworkability; and nonetheless, unworkability is relevant to judicial reasoning in those systems. Hence, a theory of relevance that relies on principles embedded in the content of rules is too simplistic. Some substantive considerations are relevant for other reasons. (shrink)
Paul Churchland proposed a conceptual framework for translating reflectance profiles into a space he takes to be the color qualia space. It allows him to determine color metamers of spectral surface reflectances without reference to the characteristics of visual systems, claiming that the reflectance classes that it specifies correspond to visually determined metamers. We advance several objections to his method, show that a significant number of reflectance profiles are not placed into the space in agreement with the qualia solid, and (...) produce two sets of counterexamples to his claim for metamers. (shrink)
Hempel and Oppenheim, in their paper 'The Logic of Explanation', have offered an analysis of the notion of scientific explanation. The present paper advances considerations in the light of which their analysis seems inadequate. In particular, several theorems are proved with roughly the following content: between almost any theory and almost any singular sentence, certain relations of explainability hold.
High figure-ground contrast usually results in more positive evaluations of visual stimuli. This may either reflect that high figure-ground contrast per se is a desirable attribute or that this attribute facilitates fluent processing. In the latter case, the influence of high figure-ground contrast should be most pronounced under short exposure times, that is, under conditions where the facilitative influence on perceptual fluency is most pronounced. Supporting this hypothesis, ratings of the prettiness of visual stimuli increased with figure-ground contrast under short (...) exposure times (.3, 1, and 3 seconds, respectively). This positive influence of figure-ground contrast was eliminated under an exposure time of 10 seconds. We conclude that stimuli with high figure-ground contrast are more appealing because they are easier to process, not because high figure-ground contrast per se is a desirable attribute. We discuss this finding in the context of William James? notion that the fringe of consciousness includes vague contextual feelings at the periphery of the focus of attention and suggest that perceptual fluency is one of these feelings. (shrink)
Ayahuasca is a psychoactive beverage that is mostly used in ritualized settings (Santo Daime rituals, neo-shamanic rituals, and even do-it-yourself-rituals). It is a common practice in the investigated socio-cultural field to call these settings “healing rituals.” For this study, 15 people who underwent ayahuasca (self-)therapy for a particular disease like chronic pain, cancer, asthma, depression, alcohol abuse, or Hepatitis C were interviewed twice about their subjective concepts and beliefs on ayahuasca and healing. Qualitative data analysis revealed a variety of motivational (...) patterns, subjective effects, and user types. Most participants were convinced that ayahuasca had influenced their illness positively or improved their coping with their illness. More importantly, it had enhanced their well being in general. As a result, we concluded that the effects of ayahuasca should not be reduced to a pharmacological model. The substance should be conceptualized as a psychological catalyst that unfolds within different fields of sociocultural ideas. (shrink)
Based on the premise that what is relevant, consistent, or true may change from context to context, a formal framework of relevance and context is proposed in which • contexts are mathematical entities • each context has its own language with relevant implication • the languages of distinct contexts are connected by embeddings • inter-context deduction is supported by bridge rules • databases are sets of formulae tagged with deductive histories and the contexts they belong to • abduction and revision (...) are supported by a notion of consistency of formulae and sets of formulae which are relative to a context, and which can, in turn, be seen as constituents of agendas. (shrink)
Normative research has nearly vanished from the academic ‘mainstream’ in accounting. Due to its prescriptive and value-driven approach, normative accounting research has been stigmatized as being unscientific and largely replaced by positive studies. We put this stigma into perspective. We first conceptualize the ‘positive-normative’ distinction and identify this dichotomy in accounting research history. We then challenge the dogmatic confinement of science to descriptive (positive) approaches. Moreover, we debate the basic conditions for normative accounting research and conclude that methodological and epistemological (...) pluralism in accounting research may help address a wide range of potential research questions. We point out that normative research approaches are essential in an applied science such as accounting, lest practical implications and prescriptions are to be the exclusive domain of accounting practice. (shrink)
In 1997, thanks to a conference paper by Rolf Löther of Berlin Humboldt University, the name of Fritz Jahr (1895-1953) was mentioned for the first time as the creator of the term and concept of bioethics (Bio-Ethik). As yet, Hans-Martin Sass of the Kennedy Institute of Ethics has been the only one to analyze Jahr's ideas more thoroughly, dedicating to the subject a series of papers (see Sass 2007). In December 2010, a collection of 15 papers by Jahr was (...) published in the German original, while in May 2011, a selection of 16 papers appeared in English translation (Jahr 2011).So who, in fact, was Jahr? A humble teacher and curate who never left his home city of Halle, an old university center on the Saale River in .. (shrink)
Summary It is here shown that the relativistic doctrine of the relativity of simultaneity is untenable and that both the special and general theories of relativity are inconsistent. It is also shown that the theories can perhaps be made consistent, but excessively weak, through the reintroduction of absolute space and a weakening of the Lorentz transformations. Non-relativistic hypotheses for some events thought to require relativity are suggested. Finally, some conjectures are made on how so wrong a theory could have been (...) accepted by so many for so long. (shrink)
Jaakko Hintikka’s work in logic and epistemology has won him the Rolf Schock Prize for Logic and Philosophy, widely viewed as the Nobel of its field. He is also one of only four philosophers this century to be the subject of a volume of the Library of Living Philosophers. Hintikka is professor of philosophy at Boston University.
Machine generated contents note: Introduction Robert Pippin; 1. Nietzsche: writings from the early notebooks Alexander Nehamas; 2. Nietzsche: The Birth of Tragedy and other writings Raymond Geuss; 3. Nietzsche: Untimely Meditations Daniel Breazeale; 4. Nietzsche: Human, All Too Human Richard Schacht; 5. Nietzsche: Daybreak Maudemarie Clark and Brian Leiter; 6. Nietzsche: The Gay Science Bernard Williams; 7. Nietzsche: Thus Spoke Zarathustra Robert Pippin; 8. Nietzsche: Beyond Good and Evil Rolf-Peter Horstmann; 9. Nietzsche's On the Genealogy of Morality Keith Ansell-Pearson; (...) 10. Nietzsche: The Anti-Christ, Ecce Homo, Twilight of the Idols Aaron Ridley; 11. Nietzsche: writings from the late notebooks Rüdiger Bittner; Select bibliography. (shrink)
‘Kant’s Anti-Cartesianism’. Dialogue 46.4 (2007):709–715. (Preçis of K. R. Westphal, Kant’s Transcendental Proof of Realism; Cambridge, 2004.) -/- > ‘Proving Realism Transcendentally: Replies to Rolf George and William Harper’. Dialogue 46.4 (2007):737–750. (Concluding replies in this symposium on *Kant’s Transcendental Proof of Realism*.).
The ongoing cynicism about leaders and organizations calls for a new standard of ethical leadership that we have labeled “transformative leadership.” This new leadership model integrates ethically-based features of six other well-regarded leadership perspectives and combines key normative and instrumental elements of each of those six perspectives. Transformative leadership honors the governance obligations of leaders by demonstrating a commitment to the welfare of all stakeholders and by seeking to optimize long-term wealth creation. Citing the scholarly literature about leadership theory, we (...) identify key elements of the six leadership perspectives that make up transformative leadership, suggest leaders who exemplify each perspective, describe the ethical foundations and message of each perspective, and offer ten propositions that scholars and practitioners can use to test the dimensions of this new transformative leadership model. (shrink)
Special issue. With contributions by Malcolm Forster, Rocio Garcia-Rotamero and Ulrich Hoffrage, Christian Jakob, Kevin Korb and Erik Nyberg, Michael Smithson, Daniel Steel, Brad Weslake, and Jon Williamson.
A substantial body of empirical evidence shows that individuals overweight extreme events and act in conflict with the expected utility theory. These findings were the primary motivation behind the development of a rank-dependent utility theory for choice under uncertainty. The purpose of this paper is to demonstrate that some simple empirical rules of thumb for choice under uncertainty are consistent with the rank-dependent utility theory.
