Optimal foraging theory has been criticized for underestimating patch exploitation time. However, proper modeling of costs not only answers these criticisms, but it also explains apparently irrational behaviors like the sunk-cost effect. When a forager is sure to experience high initial costs repeatedly, the forager should devote more time to exploitation than searching in order to minimize the accumulation of said costs. Thus, increased recognition or reconnaissance costs lead to increased exploitation times in order to reduce the frequency of future (...) costs, and this result can be used to explain paradoxical human preference for higher costs. In fact, this result also provides an explanation for how continuing a very costly task indefinitely provides the optimal long-term rate of gain; the entry cost of each new task is so great that the forager avoids ever returning to search. In general, apparently irrational decisions may be optimal when considering the lifetime of a forager within a larger system. (shrink)

Chronologically sequenced chapter units give an overall historical perspective in this text on ethics, while chapter introductions include biographical, historical and other information.

Surgical expertise does not have a clear definition and is often culturally associated with power, authority, prestige, and case number rather than more objective proxies of excellence. Multiple models of expertise progression have been proposed including the Dreyfus model, however, they all currently require subjective evaluation of skill. Recently, efforts have been made to improve the ways in which surgical excellence is measured and expertise is defined using artificial intelligence, video recordings, and accelerometers. However, these aforementioned methods of assessment are (...) still subjective or indirect proxies of expertise, thus uncovering the neural mechanisms that differentiate expert surgeons from trainees may enhance the objectivity of surgical expertise validation. In fact, some researchers have already suggested that their neural imaging-based expertise classification methods outperform currently used methods of surgical skill certification such as the Fundamentals of Laparoscopic Surgery scores. Such imaging biomarkers would not only help better identify the highest performing surgeons, but could also improve residency programs by providing more objective, evidence-based feedback and developmental milestones for those in training and perhaps act as a marker of surgical potential in medical students. Despite the potential advantages of using neural imaging in the assessment of surgical expertise, this field of research remains in its infancy. This systematic review identifies studies that have applied neuromonitoring in assessing surgical skill across levels of expertise. The goals of this review are to identify the strongest neural indicators of surgical expertise, the limitations of the current literature on this subject, the most sensible future directions for further study. We found substantial evidence that surgical expertise can be delineated by differential activation and connectivity in the prefrontal cortex across multiple task and neuroimaging modalities. Specifically, novices tend to have greater PFC activation than experts under standard conditions in bimanual and decision-making tasks. However, under high temporal demand tasks, experts had increased PFC activation whereas novices had decreased PFC activation. Common limitations uncovered in this review were that task difficulty was often insufficient to delineate between residents and attending. Moreover, attending level involvement was also low in multiple studies which may also have contributed to this issue. Most studies did not analyze the ability of their neuromonitoring findings to accurately classify subjects by level of expertise. Finally, the predominance of fNIRS as the neuromonitoring modality limits our ability to uncover the neural correlates of surgical expertise in non-cortical brain regions. Future studies should first strive to address these limitations. In the longer term, longitudinal within-subjects design over the course of a residency or even a career will also advance the field. Although logistically arduous, such studies would likely be most beneficial in demonstrating effects of increasing surgical expertise on regional brain activation and inter-region connectivity. (shrink)

At long last a comprehensive tool in English for a better understanding of the most basic terms in Aristotle's philosophy. A careful comparison of the original Greek, medieval and renaissance Latin translations and a reappraisal of English usage make the work a definitive source for the precise grasp of what has been the historical Aristotle as far as the documents permit one to judge. -- provided by the publisher.

One often hears a complaint about “bare particulars”. This complaint has bugged me for years. I know it bugs others too, but no one seems to have vented in print, so that is what I propose to do. (I hope also to say a few constructive things along the way.) The complaint is aimed at the substratum theory, which says that particulars are, in a certain sense, separate from their universals. If universals and particulars are separate, connected to each other (...) only by a relation of instantiation, then, it is said, the nature of these particulars becomes mysterious. In themselves, they do not have any properties at all. They are nothing but a pincushion into which universals may be poked. They are Locke’s “I know not what” (1689, II, xxiii, §2); they are Plato’s receptacles (Timaeus 48c–53c); they are “bare particulars”.1 Against substratum theory there is the bundle theory, according to which particulars are just bundles of universals. The substratum and bundle theories agree on much. They agree that both universals and particulars exist. And they agree that a particular in some sense has universals. (I use phrases like ‘particular P has universal U ’ and ‘particular P ’s universals’ neutrally as between the substratum and bundle theories.) But the bundle theory says that a particular is exhaustively composed of (i.e., is a mereological fusion of) its universals. The substratum theory, on the other hand, denies this. Take a particular, and mereologically subtract away its universals. Is anything left? According to the bundle theory, no. But according to the substratum theory, something is indeed left. Call this remaining something a thin particular. The thin particular does not contain the universals as parts; it instantiates them. (shrink)

While many are impressed with the utility of possible worlds in linguistics and philosophy, few can accept the modal realism of David Lewis, who regards possible worlds as sui generis entities of a kind with the concrete world we inhabit.1 Not all uses of possible worlds require exotic ontology. Consider, for instance, the use of Kripke models to establish formal results in modal logic. These models contain sets often regarded for heuristic reasons as sets of “possible worlds”. But the “worlds” (...) in these sets can be anything at all; they can be numbers, or people, or sh. The set of worlds, together with the accessibility relation and the rest of the model, is used as a purely formal structure.2 One can even go beyond establishing results about formal systems and apply Kripke models to English, as Charles Chihara has recently argued.3 Chihara shows, for instance, how to use Kripke models (plus primitive modal notions) to give an account of validity for English modal sentences. In other cases worlds are not really needed at all. It is often vivid to give a counterexample thus: “There is a possible world in which P. Since your theory implies that in all worlds, not-P, your theory is wrong.” But the counterexample could just as easily be given using modal operators: “Possibly, P. Since your theory implies that it is necessary that not-P, your theory is wrong.”. (shrink)

"Early in the 1960s Adorno gave four courses of lectures on the road leading to Negative Dialectics, his magnum opus of 1966. The second of these was concerned with the topics of history and freedom. In terms of content, these lectures represented an early version of the chapters in Negative Dialectics devoted to Kant and Hegel. In formal terms, these were improvised lectures that permit us to glimpse a philosophical work in progress." -- Cover, p. [4].

Using four principles common to several theories about possible worlds, It is argued that the necessary existence of a divine being that is essentially omnipotent, Omniscient, And morally perfect is impossible. The central argument employs the premise that there are possible worlds that any divine being ought not to actualize (because of their evil contents). This premise is then defended on the grounds that the same sort of justification that we give for other modal statements that we accept can be (...) given for modal statements which entail the premise. It is concluded that we must reject the guiding principle that gives rise to the traditional theistic concept, Viz., That if a property p of an individual is an excellence of it and hence its having p is good, Then its having p necessarily or essentially is better. (shrink)

Let us consider that version of the Argument from Design which appeals to the so called "fine tuning" of the physical constants of the universe. Call it "the Fine tuning Argument." It has many advocates, both on the Internet and in print. For some of the Internet articles, see the following web site: http://www.reasons.org/resources/papers/>. One of the argument's "print" advocates is George Schlesinger, who says the following: In the last few decades a tantalizingly great number of exceedingly rare coincidences, vital (...) for the existence of a minimally stable universe and without which no form of life could exist anywhere, have been discovered. . . . [G]iven any one of infinitely many universes, some conjunction or other of physical magnitudes will have to obtain. However, the prevailing conjunction is not merely one of indefinitely many; it is also an instance of a virtually infinitesimally rare kind of universe: the kind capable of sustaining life. The hypothesis that it was produced by a Being interested in sentient organic systems adequately explains this otherwise inexplicably astonishing fact. NEW PERSPECTIVES ON OLD TIME RELIGION, Oxford U.P., 1988, pp. 130,133] A more precise formulation of the argument is the following, with premises indicated by "P" and conclusions indicated by "C": (P1) The combination of physical constants that we observe in our universe is the only one capable of sustaining life as we know it. (P2) Other combinations of physical constants are conceivable. (shrink)

In this paper we study the question as to which computable algebras are isomorphic to non-computable \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Pi_{1}^{0}$$\end{document}-algebras. We show that many known algebras such as the standard model of arithmetic, term algebras, fields, vector spaces and torsion-free abelian groups have non-computable\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Pi_{1}^{0}$$\end{document}-presentations. On the other hand, many of this structures fail to have non-computable \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Sigma_{1}^{0}$$\end{document}-presentation.

The paper examines the personalization of information technology from the p.c. onwards to the 3-D printing and mobile technologies in order to show that the current process of technological evolution puts the human personality in the centre of its functionality. This new centre opens the discussion about authenticity and in-authenticity of human Dasein, since the common element of these new technologies is that they employ faciality and personalization in a new condition of ready-to-hand and present-at-hand mode. By applying the Heideggerian (...) modes of being on the process of personalization new forms of digital ethics appear. I suggest that the above take place in the navigation memory of the net, in the creativity of the self through the 3-D printer, and in the localization of the “psyche” in the hard drive disk. The paper defends the possibilities of an ethical, authentic and sheltering personalization, where human beings and information technology responsibly engage. (shrink)

The recent death of Eric Hobsbawm provides a fitting occasion to take stock of the entire trajectory of his work. Taking his final book, How to Change the World, as its starting point, this essay considers Hobsbawm's effort to change the way history was written. It divides his career into three main phases: 1) during the 1940s and 50s when he served his apprenticeship and emerged as a leading labor historian of modern Britain. Working in conjunction with colleagues in the (...) Communist Party Historian's group, Hobsbawm helped to raise Marxist history to academic respectability; 2) during the 1960s and 70s, Hobsbawm reached the apogee of his career, publishing the first two volumes of his synoptic history of modern capitalism, as well a multitude of more specialized and critical works. No longer just one among a group of Marxist scholars, he—along with E. P. Thompson—became one of the most famous and influential historians in the world. 3) For Hobsbawm, as for other Marxists, the 1980s and 1990s were a time of crisis, when Marxism was destabilized and communism collapsed. Ironically, this essay argues, it was during this challenging period that Hobsbawm's most influential work appeared—most notably, his studies of modern nationalism and his analysis of the “invention of tradition”. Whereas the early Hobsbawm had worked to bring Marxist history into the academy, the later Hobsbawm showed how the academy could absorb analytical elements initially formulated in a Marxist framework by translating them into non-Marxist terms. Whatever one thinks of Hobsbawm's intellectual legacy, one must acknowledge his status as a polymathic giant who wrote global history that was at once theoretically grounded, publicly accessible, and historiographically consequential. (shrink)