Leopold first discusses the conservation of natural resources in the southwestern United States in economic tenns, stressing, in particular, erosion and aridity. He then concludes his analysis with a discussion of the moral issues involved, developing his general position within the context of P. D. Ouspenky’s early philosophy of organism.

Gathers the pre-Sand Country Almanac writings of Aldo Leopold, showing that he was not born an ecologist, but evolved over time through experimentation and thought.

The theme of this book is formed by a pair of concepts: the concept of formal language as carrier of the precise expression of meaning, facts and problems, and the concept of algorithm or calculus, i.e. a formally operating procedure for the solution of precisely described questions and problems. The book is a unified introduction to the modern theory of these concepts, to the way in which they developed first in mathematical logic and computability theory and later in automata theory, (...) and to the theory of formal languages and complexity theory. Apart from considering the fundamental themes and classical aspects of these areas, the subject matter has been selected to give priority throughout to the new aspects of traditional questions, results and methods which have developed from the needs or knowledge of computer science and particularly of complexity theory. It is both a textbook for introductory courses in the above-mentioned disciplines as well as a monograph in which further results of new research are systematically presented and where an attempt is made to make explicit the connections and analogies between a variety of concepts and constructions. (shrink)

There is sufficient evidence from more recent experiments in psychology that equal retinal stimulus-elements do not lead to equal experiences and reactions except under certain rather specific conditions. An unsophisticated observer will find himself surprised to be able to cover with his own finger a person entering the door of his living room. When the finger is moved to the right or left, thus doing away with the precise retinal coincidence with the person, the observer will soon become unable to (...) recognize intuitively the actual retinal stimulus equality of the two distant things. This usually holds even for the case when he is making every inner effort towards an antagonistic, analytic perceptual attitude of the type which is used by painters or draughtsmen in order to represent the environmental situation in a similar way as it would project itself on a photographic plate or on a retina. (shrink)

Traditional explanations of multistable visual phenomena (e.g. ambiguous figures, perceptual rivalry) suggest that the basis for spontaneous reversals in perception lies in antagonistic connectivity within the visual system. In this review, we suggest an alternative, albeit speculative, explanation for visual multistability – that spontaneous alternations reflect responses to active, programmed events initiated by brain areas that integrate sensory and non-sensory information to coordinate a diversity of behaviors. Much evidence suggests that perceptual reversals are themselves more closely related to the expression (...) of a behavior than to passive sensory responses: (1) they are initiated spontaneously, often voluntarily, and are influenced by subjective variables such as attention and mood; (2) the alternation process is greatly facilitated with practice and compromised by lesions in non-visual cortical areas; (3) the alternation process has temporal dynamics similar to those of spontaneously initiated behaviors; (4) functional imaging reveals that brain areas associated with a variety of cognitive behaviors are specifically activated when vision becomes unstable. In this scheme, reorganizations of activity throughout the visual cortex, concurrent with perceptual reversals, are initiated by higher, largely non-sensory brain centers. Such direct intervention in the processing of the sensory input by brain structures associated with planning and motor programming might serve an important role in perceptual organization, particularly in aspects related to selective attention. (shrink)

This volume presents the proceedings of the Computer Science Logic Workshop CSL '92, held in Pisa, Italy, in September/October 1992. CSL '92 was the sixth of the series and the first one held as Annual Conference of the European Association for Computer Science Logic (EACSL). Full versions of the workshop contributions were collected after their presentation and reviewed. On the basis of 58 reviews, 26 papers were selected for publication, and appear here in revised final form. Topics covered in the (...) volume include: Turing machines, linear logic, logic of proofs, optimization problems, lambda calculus, fixpoint logic, NP-completeness, resolution, transition system semantics, higher order partial functions, evolving algebras, functional logic programming, inductive definability, semantics of C, classes for a functional language, NP-optimization problems, theory of types and names, sconing and relators, 3-satisfiability, Kleene's slash, negation-complete logic programs, polynomial-time oracle machines, and monadic second-order properties. (shrink)

This book offers a comprehensive treatment of the classical decision problem of mathematical logic and of the role of the classical decision problem in modern computer science. The text presents a revealing analysis of the natural order of decidable and undecidable cases and includes a number of simple proofs and exercises.

Most accounts of the derogatory meaning of slurs are semantic. Recently, Nunberg proposed a purely pragmatic account offering a compelling picture of the relation between derogatory content and social context. Nunberg posits that the semantic content of slurs is identical to that of neutral counterparts, and that derogation is a result of the association of slur use with linguistic conventions of bigoted speakers. The mechanism responsible for it is a special kind of conversational implicature. However, this paper argues that Nunberg’s (...) proposal suffers from technical and conceptual problems regarding the application of the concepts of implicature and convention. It is proposed that the implicature mechanism should be replaced by expressive commitment attribution. The account advocated here preserves crucial insights of Nunberg’s analysis, 25–48, 2013a, Analytic Philosophy 54, 350–363, 2013b; Bolinger Nous, 51, 439–462, 2017), giving them a firmer conceptual basis. It supports a distinction between derogation and offensiveness of slurs that improves on the one proposed by Hom and May, 293–313 2013), and sheds light on puzzling borderline cases: the use of slurs by ignorant speakers and controversies surrounding the status of some words as potentially slurs. (shrink)

In order to contribute to the consolidation in the field ofPositive Psychology, we reinvestigated the factor structure of top 10 positive emotions of Barbara Fredrickson. Former research in experimental settings resulted in a three-cluster solution, which we tested withexploratoryandconfirmatorymethodology against different factor models. Within our non-experimental data (N= 312), statistical evidence is presented, advocating for a single factor model of the 10 positive emotions. Different possible reasons for the deviating results are discussed, as well as the theoretical significance to various (...) subfields inPositive Psychology(e.g., therapeutical interventions). Furthermore, the special role ofawewithin the study and its implications for further research in the field are discussed. (shrink)

ABSTRACTPeople's relationship between positive and negative affect varies on a continuum from relatively independent to bipolar opposites, with stronger bipolar opposition being termed affective bipolarity. Experiencing more depressive symptoms is associated with increased bipolarity, but the processes underlying this relation are not yet understood. Here, we sought to replicate this link, and to examine the role of two potential mediating mechanisms: emotion regulation ability, and trait brooding. Drawing from the Dynamic Model of Affect, we hypothesised that a poor ability to (...) regulate negative emotion, and the tendency to brood over one's depressed feelings would predict stronger affective bipolarity, and mediate the relationship between depressive symptoms and affective bipolarity. To measure affective bipolarity, we calculated within-person affect correlations using two weeks of experience sampling data from a community sample. Mediation analyses indicated that baseline assessments o... (shrink)

Our century thinks scientifically. Nothing would be more plausible than that it has the same relation to the world as does Sein und Zeit. This, however, is not the case. For Heidegger, Science and Technology are essential characteristics of our time. Both are rooted in man insofar as he is a "Will to Will." Scientific man is man as subject. As such he does not wish to see the world the way it appears by itself but rather as a field (...) that may be tilled by him and is preordained for him and his activity. The world as the object of action does not merely come to man as a legacy; instead he violently grasps it and makes it his hunting ground. "Man becomes that Seiende, on which is based all Seiende in the manner of its Being and its Truth". Man of the machine-age does not allow for a world "where Being is as Being." The Subject "sets" its world and therefore has a Welt-bild and Welt-anschauungen, all of these being bifurcations indicating the separation of subject and world. A uniform world is replaced by Ego over against World. In this kind of "world" man makes God in his own image by setting the "world" as the stage for his Welt-anschauung, one which aims at utility and plasticity. Man is the director staging the world of his idea. As the objects which are handled have properties which reflect back on the producer, the directing is all the more dangerous. He who in everything that he thinks and does is staging himself might become the victim of his own production; the world of the calculating man has the character of its producer. "The calculating mind, adapting itself, invents 'values'. Value is the transformation of the Essence of Essence into the quantitative and the gigantic." In Holzwege Heidegger shows that the gigantic is a consequence of the way the subject places himself in the world. The world does not appear as what it is, but as what man makes of it. The world of the machine-age is a world-less world and the "world" as it is described in Sein und Zeit and more so in the essay "Vom Wesen des Grundes" does not appear in it. (shrink)

In this paper I describe the place of naive realism in Russell’s changing accounts of perception. I argue ‎for the following conclusions: (1) The early period, 1898-1910: I am inclined to think that the naïve ‎realism that Russell embraced so enthusiastically early on may not have been intended as a naïve ‎realism about perception, but as a metaphysical or semantical thesis. (2) The Problems of Philosophy ‎‎(1912): Russell abandons naïve realism (if, in fact, he ever held it) and presents a (...) sense-datum version ‎of representative realism. (3) “On Matter” (1912): here we see Russell’s best attempt to defend ‎something very close to the standard doctrine of naïve realism. The objects of perception—the ‎‎“everyday material objects such as caterpillars and Cadillacs”—have, of course, undergone severe ‎reconstruction. But the resulting picture does capture the spirit of the doctrine. (4) The period from ‎‎1914 to 1927: though Russell’s thinking about perception underwent some significant changes during ‎this period—the sense datum theory is replaced by neutral monism—I try to show that the ‎distinction between the matter of physics and the thing of common sense is a constant feature of ‎Russell’s changing views. And I suggest that our perceptual relation the thing of common ‎sense (as logically reconstructed by Russell) can usefully be viewed as a limited sort of naïve realism. ‎‎(5) The period after 1927: the thing of common sense no longer features in Russell’s account of our ‎perceptual access to the world. The things we perceive are percepts, located in our private spaces. The ‎only material objects of which these percepts are parts are our brains. All other material objects are ‎beyond our perceptual reach and are accessible only via inference. This is the end of anything ‎resembling the traditional view of naïve realism in Russell’s account of perception. ‎. (shrink)

Given the apparent nondisplaceability and noncancellability of the derogatory content of slurs, it may appear puzzling that non-derogatory uses of slurs exist. Moreover, these uses seem to be in general available only to in-group speakers, thereby exhibiting a peculiar kind of context-sensitivity. In this paper the author argues that to understand non-derogatory uses we should consider slurs in terms of the kind of social practice their uses instantiate. A suitable theory of social practices has been proposed by McMillan. In typical (...) uses the practice is one of bigotry and discrimination. Non-derogatory uses are only possible to the extent that they consitute acts of an alternative, non-derogatory practice. In the core cases it must be a subversive practice of satire or reappropriation. The social identity of speakers is not an ultimately decisive factor but it is an important constitutive condition: most non-derogatory practices of slur-use can only be performed by a member of the target group. (shrink)

This article raises the question of whether standard economics with the general equilibrium model at its core applies situational analysis in a Popperian sense. Contrary to Popper's own view, the authors come to the conclusion that this is not the case. Standard economics fails to represent elements essential to any social situation in an adequate manner. It comprises uncertainty, time and space, social interaction, unintended effects, as well as culture and institutions. The authors suggest, therefore, the socioeconomic context as an (...) alternative approach to analyzing social situations. It consists of four basic elements: (1) dominant worldviews, (2) institutions and technologies, (3) relative prices, and (4) political instruments. The alternative approach was applied with some success to analyzing inter alia problems of unemployment as well as of transformation. (shrink)

Leopold first discusses the conservation of natural resources in the southwestern United States in economic tenns, stressing, in particular, erosion and aridity. He then concludes his analysis with a discussion of the moral issues involved, developing his general position within the context of P. D. Ouspenky’s early philosophy of organism.