In this study, we used a word search puzzle paradigm to investigate age differences in the rate of information gain and the cues used to make patch-departure decisions in information foraging. The likelihood of patch departure increased as the profitability of the patch decreased generally. Both younger and older adults persisted past the point of optimality as defined by the marginal value theorem, which assumes perfect knowledge of the foraging ecology. Nevertheless, there was evidence that adults were rational in terms (...) of being sensitive to the change in RG for making the patch-departure decisions. However, given the limitations in cognitive resources and knowledge about the ecology, the estimation of RG may not be accurate. Younger adults were more likely to leave the puzzle as the long-term RG incrementally decreased, whereas older adults were more likely to leave the puzzle as the local RG decreased. However, older adults with better executive control were more likely to adjust their likelihood of patch-departure decisions to the long-term change in RG. Thus, age-dependent reliance on the long-term or local change in RG to make patch-departure decisions might be due to individual differences in executive control. (shrink)

How, and how well, do people switch between exploration and exploitation to search for and accumulate resources? We study the decision processes underlying such exploration/exploitation trade‐offs using a novel card selection task that captures the common situation of searching among multiple resources (e.g., jobs) that can be exploited without depleting. With experience, participants learn to switch appropriately between exploration and exploitation and approach optimal performance. We model participants' behavior on this task with random, threshold, and sampling strategies, and find that (...) a linear decreasing threshold rule best fits participants' results. Further evidence that participants use decreasing threshold‐based strategies comes from reaction time differences between exploration and exploitation; however, participants themselves report non‐decreasing thresholds. Decreasing threshold strategies that “front‐load” exploration and switch quickly to exploitation are particularly effective in resource accumulation tasks, in contrast to optimal stopping problems like the Secretary Problem requiring longer exploration. (shrink)

This book provides journalism students with an easy-to-read yet theoretically rich guide to the dialectics, contradictions, problems, and promises encapsulated in the term 'journalism ethics'. Offering an overview of a series of crises that have shaken global journalism to its foundations in the last decade, including the Coronavirus pandemic, the Black Lives Matter movement, and the 2020 US presidential election, the book explores the structural and ethical problems that shape the journalism industry today. The authors discuss the three principle existential (...) crises that continue to plague the news industry: a failing business model, technological disruption, and growing public mistrust of journalism. Other topics covered include social media ethics, privacy concerns, chequebook journalism, as well as a new analysis of journalism theory that critiques the well-worn tropes of objectivity, the Fourth Estate, freedom of the press, and the marketplace of ideas to develop a sophisticated materialist reimagining of journalism ethics. This is a key text for students of journalism, mass communication, and media ethics, as well as for academics, researchers, and communications professionals interested in contemporary journalism ethics. (shrink)

Over the past three decades the ethnographic-based human sciences (anthropology, social linguistics, ethnomusicology, sociology, etc.) have come under heavy scrutiny for the perpetuation of injustice and inequality, and a lack of sensitivity to indigenous epistemologies and material needs. Among the nefarious epistemological issues is that of “transcendental knowledge,” information that is presented as “fact” or through impervious narrative in the mode of so-called empirical sciences. The model of transcendental knowledge still pervades the human sciences despite critiques from postcolonial and poststructural (...) scholars. Through a simultaneous re-evaluation of the Dialectic of Enlightenment 's critique and an analysis of the pressures and perils of the academic market, we can see how Horkheimer and Adorno's cautionary analysis can be applied to contemporary ethnography in an effort to philosophize and practice writing that does not submit to the reifying pressures of grand and grave theories and represents human life with the deserved dignity and distress. (shrink)

Qualitative inquiry into eating disorders is burgeoning, offering valuable and innovative insights into various aspects of the condition. This study used life‐history interviews with 20 women who had recovered from anorexia nervosa, bulimia nervosa or both and who had remained healthy. The interviews focused on the women's narratives and experience rather than a diagnostic therapeutic model. Three themes of control, connectedness and conflict emerged as significant in the development, experience of, and recovery from an eating disorder. The development of the (...) condition was attributed to a lack of control, a sense of non‐connectedness to family and peers and extreme conflict with significant others. Recovery occurred when the women re‐engaged with life, developed skills necessary for conflict resolution and rediscovered their sense of self. Rather than viewing the development of, and recovery from an eating disorder as separate and discrete events, the data from the life‐history interviews suggest they are better viewed as one entity — that is, the journey of an individual attempting to discover and develop their sense of self. This perspective challenges some current constructs of eating disorders; it is not a condition in and of itself but a symptom of deeper issues that if addressed, when the individual is ‘ready’ to make that choice, will lead to recovery. (shrink)

Psychedelics such as psilocybin reliably produce significantly altered states of consciousness with a variety of subjectively experienced effects. These include certain changes to perception, cognition, and affect,1 which we refer to here as the acute subjective effects of psychedelics. In recent years, psychedelics such as psilocybin have also shown considerable promise as therapeutic agents when combined with talk therapy, for example, in the treatment of major depression or substance use disorder.2 However, it is currently unclear whether the aforementioned acute subjective (...) effects are necessary to bring about the observed therapeutic effects of psilocybin and other psychedelics. This uncertainty has sparked a lively—though still largely hypothetical—debate on whether psychedelics without subjective effects (“nonsubjective psychedelics” or “non-hallucinogenic psychedelics”) could still have the same therapeutic impact, or whether the acute subjective effects are in fact necessary for this impact to be fully realized.3,4,5. (shrink)

The greatest diversity of butterflies and their host plants occurs in tropical regions. Some groups of butterflies in the tropics exhibit monophagous feeding in the larval stage, exploiting only one family of plants; others are polyphagous, feeding on plants in two or more distinct families. The two major types of tropical habitats for butterflies, namely primary and secondary forests, offer very different evolutionary opportunities for the exploitation of plants as larval food. Butterflies are faced with the major logistical problem, as (...) are many other herbivorous insects, of depositing eggs on the correct plant for successful larval feeding. This paper, using the concepts of phenotype set and spatial patchiness of resources, attemps to make some predictions as to the optimal phenotypic systems for monophagous and polyphagous feeding in tropical butterflies, as related to the spatial patchiness of larval host plants in primary and secondary forests. In addition to the secondary compound chemistry of larval host plants as playing a role in the evolution of monophagy and polyphagy, the assumption is made that the spatial patchiness of host plants within and among different families also acts as a major factor in determining optimal ranges of phenotypes for different patterns of larval feeding. Owing to the high spatial patchiness of primary forest species of canopy trees and vines, it is predicted that butterflies exploiting these will be mostly polyphagous, whereas secondary forests having stable formations of fewer plant species and larger patches of these plants, will have mostly monophagous species. Forest understories may have both monophagous and polyphagous species, depending upon the layer of forest and the general type of understory (i.e. palmaceous or dicotyledonous). Field data on some groups of butterflies from tropical America support these predictions. Polyphagous butterflies are predicted to possess a genetic system of mixed morphs with a population being polymorphic as a whole; monophagous butterflies are predicted to have individuals all more or less similar genetically, and with a high amount of genic variation within individuals. Other forms of monophagy may evolve in species that are essentially monomorphic but with various mechanisms (physiological, developmental, behavioral) of phenotypic flexibility at the individual level. Although the environment is essentially coarse-grained for larvae since most are sedentary and polymorphism is an optimal adaptive strategy, the oviposition strategy of the adult must also be considered and some situations (i.e. forest canopy) have resources (host plants) distributed in a fine-grained fashion. Other forms of limited polyphagy may result from monomorphic genetic systems in which there is considerable phenotypic flexibility. (shrink)

Drawing on a survey of over 4000 students and 1300 faculty members at the University of Maryland Global Campus, we find evidence for a reconceptualization of the use of commercialized websites offering access to “tutors” or “study help” as a type of collaborative cheating. Past studies have examined this behavior as an extension of contract cheating, but we find that students perceive the use of these sites very differently than they perceive contract cheating behaviors. In this paper we will discuss (...) how “tutor” or “study helper” websites combine the phenomena of collaborative cheating with internet-driven shifts in cultural and social perceptions to create a new type of cheating behavior that is viewed differently by students and faculty. (shrink)

The Covid-19 pandemic has demonstrated the potential of genomic technologies for the detection and surveillance of infectious diseases. Pathogen genomics is likely to play a major role in the future of research and clinical implementation of genomic technologies. However, unlike human genetics, the specific ethical and social challenges associated with the implementation of infectious disease genomics has received comparatively little attention. In this paper, we contribute to this literature, focusing on the potential consequences for individuals and communities of the use (...) of these technologies. We concentrate on areas of challenges related to privacy, stigma, discrimination and the return of results in the cases of the surveillance of known pathogens, metagenomics and host genomics. (shrink)

Refining the model for an emergency department‐based mental health nurse practitioner outpatient service The mental health nurse practitioner (MHNP) role based in the emergency department (ED) has emerged in response to an increase in mental health‐related presentations and subsequent concerns over waiting times, co‐ordination of care and therapeutic intervention. The MHNP role also provides scope for the delivery of specialised primary care. Nursing authors are reporting on nurse‐led outpatient clinics as a method of healthcare delivery that allows for enhanced access (...) to health‐care, particularly following hospital discharge. However, due to a lack of in‐depth substantiation, this mode of service delivery requires more thorough investigation. This study describes the refinement phase undertaken before the implementation and pilot evaluation of a formalised and structured MHNP outpatient service in the ED of a large inner‐city hospital in Sydney, Australia. An expert advisory panel (EAP) consisting of key local informants was convened to provide feedback on and refinement to the proposed model. This related to issues such as target population, structure and process considerations, outcome measures and interface within the overall health service. Findings from the EAP meeting are presented and discussed. The importance of linking methods with the appropriate methodology in evaluating a healthcare program is highlighted. (shrink)

Precision medicine (PM) and genomics are increasingly scrutinized through the lens of health inequities. This is a welcome development for a field that, while concerned with health-related differen...

Papers presented at the Kierkegaard: Resources and Results Conference, held at McGill University, June 6-8, 1980.

Conley and colleagues (2023) explore how calls for broad public engagement (PE) in the case of heritable human genome editing are being put into action, reviewing the activities of five different i...

Animals depleting one patch of resources must decide when to leave and switch to a fresh patch. Foraging theory has predicted various decision mechanisms; which is best depends on environmental variation in patch quality. Previously we tested whether these mechanisms underlie human decision making when foraging for external resources; here we test whether humans behave similarly in a cognitive task seeking internally generated solutions. Subjects searched for meaningful words made from random letter sequences, and as their success rate declined, they (...) could opt to switch to a fresh sequence. As in the external foraging context, time since the previous success and the interval preceding it had a major influence on when subjects switched. Subjects also used the commonness of sequence letters as a proximal cue to patch quality that influenced when to switch. Contrary to optimality predictions, switching decisions were independent of whether sequences differed little or widely in quality. (shrink)

We study the effects of density dependent migrations on the stability of a predator-prey model in a patchy environment which is composed with two sites connected by migration. The two patches are different. On the first patch, preys can find resource but can be captured by predators. The second patch is a refuge for the prey and thus predators do not have access to this patch. We assume a repulsive effect of predator on prey on the resource (...) patch. Therefore, when the predator density is large on that patch, preys are more likely to leave it to return to the refuge. We consider two models. In the first model, preys leave the refuge to go to the resource patch at constant migration rates. In the second model, preys are assumed to be in competition for the resource and leave the refuge to the resource patch according to the prey density. We assume two different time scales, a fast time scale for migration and a slow time scale for population growth, mortality and predation. We take advantage of the two time scales to apply aggregation of variables methods and to obtain a reduced model governing the total prey and predator densities. In the case of the first model, we show that the repulsive effect of predator on prey has a stabilizing effect on the predator-prey community. In the case of the second model, we show that there exists a window for the prey proportion on the resource patch to ensure stability. (shrink)

Egalitarians must address two questions: i. What should there be an equality of, which concerns the currency of the ‘equalisandum’; and ii. How should this thing be allocated to achieve the so-called equal distribution? A plausible initial composite answer to these two questions is that resources should be allocated in accordance with choice, because this way the resulting distribution of the said equalisandum will ‘track responsibility’ — responsibility will be tracked in the sense that only we will be responsible for (...) the resources that are available to us, since our allocation of resources will be a consequence of our own choices. But the effects of actual choices should not be preserved until the prior effects of luck in constitution and circumstance are first eliminated. For instance, people can choose badly because their choice-making capacity was compromised due to a lack of intelligence (i.e. due to constitutional bad luck), or because only bad options were open to them (i.e. due to circumstantial bad luck), and under such conditions we are not responsible for our choices. So perhaps a better composite answer to our two questions (from the perspective of tracking responsibility) might be that resources should be allocated so as to reflect people’s choices, but only once those choices have been corrected for the distorting effects of constitutional and circumstantial luck, and on this account choice preservation and luck elimination are two complementary aims of the egalitarian ideal. Nevertheless, it is one thing to say that luck’s effects should be eliminated, but quite another to figure out just how much resource redistribution would be required to achieve this outcome, and so it was precisely for this purpose that in 1981 Ronald Dworkin developed the ingenuous hypothetical insurance market argumentative device (HIMAD), which he then used in conjunction with the talent slavery (TS) argument, to arrive at an estimate of the amount of redistribution that would be required to reduce the extent of luck’s effects. However recently Daniel Markovits has cast doubt over Dworkin’s estimates of the amount of redistribution that would be required, by pointing out flaws with his understanding of how the hypothetical insurance market would function. Nevertheless, Markovits patched it up and he used this patched-up version of Dworkin’s HIMAD together with his own version of the TS argument to reach his own conservative estimate of how much redistribution there ought to be in an egalitarian society. Notably though, on Markovits’ account once the HIMAD is patched-up and properly understood, the TS argument will also allegedly show that the two aims of egalitarianism are not necessarily complementary, but rather that they can actually compete with one another. According to his own ‘equal-agent’ egalitarian theory, the aim of choice preservation is more important than the aim of luck elimination, and so he alleges that when the latter aim comes into conflict with the former aim then the latter will need to be sacrificed to ensure that people are not subordinated to one another as agents. I believe that Markovits’ critique of Dworkin is spot on, but I also think that his own positive thesis — and hence his conclusion about how much redistribution there ought to be in an egalitarian society — is flawed. Hence, this paper will begin in Section I by explaining how Dworkin uses the HIMAD and his TS argument to estimate the amount of redistribution that there ought to be in an egalitarian society — this section will be largely expository in content. Markovits’ critique of Dworkin will then be outlined in Section II, as will be his own positive thesis. My critique of Markovits, and my own positive thesis, will then make a fleeting appearance in Section III. Finally, I will conclude by rejecting both Dworkin’s and Markovits’ estimates of the amount of redistribution that there ought to be in an egalitarian society, and by reaffirming the responsibility-tracking egalitarian claim that choice preservation and luck elimination are complementary and not competing egalitarian aims. (shrink)

This artists’ text examines the relationship between photographic images and Massively Multiplayer Online (MMO) environments. We note that such scripted image worlds necessitate a fundamental reconsideration of the capacities of image, its formation, reproduction, storage and circulation. As an archaeologist would document an excavation, extending conventional methods through 3D visualization technology to work in new ways with the archaeological record, we chose to document a world built and razed digitally by a now dormant group of anonymous gamers called the Yung (...) Cum Bois (YCBs). We turn to some definitions of griefer as a subcultural phenomenon within online culture to attempt to contextualize our involvement some more, thinking through the forms of image-gathering that grief play has generated, such as scripted object attacks where image-objects spawn and self-replicate, continually spurting out copies of themselves, lagging the region, slowing down frame rates, consuming land resources. Here we witness images blockading network logistics. This was active fieldwork. We got involved. We applied visualization technology learnt from archaeological computing research to the avatars, temporary structures and abandoned ruins of an online world, Second Life (SL). We patched together a kind of virtual photogrammetry, enabling the monumentalization of avatars, objects and scenarios, recompiling these into new configurations and uploading them freely to be reused, detourned and weaponized by our virtual friends. We situate this endeavour within a cobbled history of imaging technology, the networked self and its pathologies, riffling through our own image dump. Here. (shrink)

We investigate a system of two species exploiting a common resource. We consider both abiotic (i.e. with a constant resource supply rate) and biotic (i.e. with resource reproduction and self-limitation) resources. We are interested in the asymmetric competition where a given consumer is the locally superior resource exploiter (LSE) and the other is the locally inferior resource exploiter (LIE). They also interact directly via interference competition in the sense that LIE individuals can use two opposite (...) strategies to compete with LSE individuals: we assume, in the first case, that LIE uses an avoiding strategy, i.e. LIE individuals go to a non-competition patch to avoids competition with LSE individuals, and in the second one, LIE uses an aggressive strategy, i.e. being very aggressive so that LSE individuals have to go to a non-competition patch. We further assume that there is no resource in the non-competition patch so that individuals have to come back to the competition patch for their maintenance, and the migration process acts on a fast time scale in comparison with demography and competition processes. The models show that being aggressive is efficient for LIE’s survival and even provoke global extinction of the LSE and this result does not depend on the nature of resource. (shrink)

The aim of this work is to present aggregation methods of hierarchically organized systems allowing one to replace the initial micro-system by a macro-system described by a few global variables. We also study the relations between the fast micro-dynamics and the slow macro-dynamics which can produce global properties. Emergence corresponds to a bottom-up coupling that is the result effected by a micro-level at a macro-level. As an example, we present prey-predator models with different time scales in an heterogeneous environment. A (...) fast time scale is associated to the migration process on spatial patches and a slow time scale is associated to growth and interactions between the populations. Preys must go on spatial patches where resources are located and where predators can attack them. The efficiency of the predators to catch preys is patch dependent. Perturbation methods allow us to aggregate the initial system of differential equations for the patch sub-populations into a macro-system of two differential equations governing the total population densities. We study the case of density independent and density dependent migrations. In the latter case, we show that different functional responses can emerge in the macro prey-predator model as a result of the coupling between the slow and fast systems. (shrink)

Ranchers and pastoralists worldwide manage and depend upon resources from rangelands across Earth’s terrestrial surface. In the Great Plains of North America rangeland ecology has increasingly recognized the importance of managing rangeland vegetation heterogeneity to address conservation and production goals. This paradigm, however, has limited application for ranchers as they manage extensive beef production operations under high levels of social-ecological complexity and uncertainty. We draw on the ethics of care theoretical framework to explore how ranchers choose management actions. We used (...) modified grounded theory analysis of repeated interviews with ranchers to compare rancher decision-making under relatively certain and uncertain conditions and describe a typology of practices used to prioritize and choose management actions that maintain effective stewardship of these often multi-generational ranches. We contrast traditional decision-making frameworks with those described by interviewees when high levels of environmental and market uncertainty or ecological complexity led ranchers toward use of care-based, flexible and relational frameworks for decision-making. Ranchers facing complexity and uncertainty often sought “middle-ground” strategies to balance multiple, conflicting responsibilities in rangeland social-ecological systems. For example, ranchers’ care-based decision-making leads to conservative stocking approaches to “manage for the middle,” e.g. to limit risk under uncertain weather and forage availability conditions. Efforts to promote heterogeneity-based rangeland management for biodiversity conservation through the restoration of patch burn grazing and prairie dog conservation will require increased valuation of ranchers’ care work. (shrink)

Native peoples have often been portrayed as natural conservationists, living a “balanced” existence with nature. It is argued that this perspective is a result of an imprecise operational definition of conservation. Conservation is defined here in contrast to the predictions of foraging theory, which assumes that foragers will behave to maximize their short-term harvesting rate. A behavior is deemed conservation when a short-term cost is paid by the resource harvester in exchange for long-term benefits in the form of sustainable (...) harvests. An example of the usefulness of such an operational definition is presented using data on patch and prey choice decisions of a group of subsistence hunters, the Piro of Amazonian Peru. Results indicate that the area around the Piro village is depleted of prey, and that hunters allocate more time to patches where return rates are highest. This response is consistent with both a conservation strategy and foraging theory. Contrary to the expectation of the conservation strategy, however, hunters do not restrain from pursing opportunistically encountered prey in the depleted areas. The implications for conservation policy are briefly discussed. (shrink)

Watersheds constitute a special case of multiple-use common pool resources (CPRs). In a textual sense, watersheds tend to be mosaics of privately owned and managed patches of land. At the same time, however, watersheds are also ecosystems in which multiple resources and people interact through an infinity of bio-physical processes. Through such interaction, new watershed-level qualities emerge that, together with other factors, condition watershed users' continued resource use and access. In this perspective, watersheds become common-pool resources. Hence, watershed (...) users do not only manage their individual plots, crops, forests, etc., knowingly or not, they manage landscape patterns and bio-physical processes that transcend their private property. In this context, drawing on experiences gained through participatory action research in a micro-watershed in the Andean hillsides of southern Colombia, this paper describes a process aimed at fostering collective watershed management. The paper illustrates the importance of platforms as a mechanism for negotiating and coordinating collective action by multiple users and discusses the issues of representation on such platforms as well as the importance of third party facilitation. (shrink)

Watersheds constitute a special case of multiple-use common pool resources (CPRs). In a textual sense, watersheds tend to be mosaics of privately owned and managed patches of land. At the same time, however, watersheds are also ecosystems in which multiple resources and people interact through an infinity of bio-physical processes. Through such interaction, new watershed-level qualities emerge that, together with other factors, condition watershed users' continued resource use and access. In this perspective, watersheds become common-pool resources. Hence, watershed (...) users do not only manage their individual plots, crops, forests, etc., knowingly or not, they manage landscape patterns and bio-physical processes that transcend their private property. In this context, drawing on experiences gained through participatory action research in a micro-watershed in the Andean hillsides of southern Colombia, this paper describes a process aimed at fostering collective watershed management. The paper illustrates the importance of platforms as a mechanism for negotiating and coordinating collective action by multiple users and discusses the issues of representation on such platforms as well as the importance of third party facilitation. (shrink)

Recent work in the philosophy of scientific concepts has seen the simultaneous revival of operationalism and development of patchwork approaches to scientific concepts. We argue that these two approaches are natural allies. Both recognize an important role for measurement techniques in giving meaning to scientific terms. The association of multiple techniques with a single term, however, raises the threat of proliferating concepts (Hempel, 1966). While contemporary operationalists have developed some resources to address this challenge, these resources are inadequate to account (...) for the full range of complex behaviors of scientific concepts. We adopt show how the patchwork approach’s repertoire of inter-patch relations can expand the resources available to the operationalist. We focus on one especially important type of inter-patch relation: sharing a general reasoning strategy. General reasoning strategies serve two important functions: (1) they bind together distinct patches of scientific concepts, and (2) they provide normative guidance for extending concepts to new domains. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reflections on Raphael PAUL BAROLSKY The essence of all appreciation and analysis of art is the translation of visual perceptions into compelling verbal form. —Ralph Lieberman cultural unity Horace Walpole, Sir Joshua Reynolds, Johann Wolfgang Goethe, Eugène Delacroix, Honoré Balzac, Friedrich Hegel, Charles Baudelaire, Friedrich Nietzsche, Pierre Renoir, Nathaniel Hawthorne, August Wilhelm von Schlegel, Heinrich von Kleist, Franz Grillparzer, Fyodor Dostoyevsky, Ivan Turgenev, Wilhelm Heinrich Wackenroder, George Eliot, Jean-Auguste (...) Dominique Ingres, Roger Fry, Bernard Berenson, Theodor Hetzer, Roberto Longhi, Heinrich Wölfflin, and Stendhal are among the many essayists, critics, novelists, poets, painters and art historians who have responded to Raphael’s work as painter, architect or archeologist over the centuries. I can well imagine all of those listed above, among many others, united in an imaginary painting similar to the School of Athens—in other words, a vision that reconciles their various views of the world in a harmony analogous to the unity of philosophers in Raphael’s great fresco. Raphael is a towering figure in the history of European culture. The year 2020 was the 500th anniversary of the death of the great painter in Rome at the age of thirty-seven. In the wake of recent exhibitions that commemorated the artist’s achievement, I propose to touch briefly and lightly on a few aspects arion 28.2 fall 2020 100 reflections on raphael of Raphael’s life and works. Please think of these remarks as a series of suggestions, not attempts at definitive interpretation. I think of this essay as a rather experimental piece. THE SCHOOL OF ATHENS i should like to begin with a few brief remarks on what must be Raphael’s most famous work of art. I mean his School of Athens (fig. 1), which is, like Leonardo’s Mona Lisa and Last Supper or like Michelangelo’s David and Creation of Adam, an image widely known and admired. What more is there to say about The School Of Athens, one of the central images in the Stanza della Segnatura? You might spend the rest of your life reading about this great work and never understand it fully. Nevertheless, I want to focus for a moment on a central detail of the work and, on the basis of my description, point to a significant aspect of the fresco that has been universally overlooked. First the description, then the aperçu. Fig. 1. School of Athens. Ca. 1510–1512. Photo Credit : Erich Lessing / Art Resource, NY. Paul Barolsky 101 At the center of the School of Athens we behold the two great philosophers of classical antiquity: Plato and Aristotle. Plato holds a copy of his Timaeus, a dialogue that concerns the harmony of the heavens; Aristotle holds a copy of his Ethics, a work that pertains to human relations in this world. It was the goal of Renaissance thinkers to create a harmony or concord of the thought of these philosophers: a Concordia Platonis et Aristotelis. Raphael’s fresco, as is well known, presents the visual ideal of such harmony. Whereas Aristotle gestures downward, alluding to this world, in which his Ethics matter, Plato points heavenward, evoking the order of the cosmic realm described in Timaeus. Raphael makes visible the ideal of concordia when he movingly pictures the way in which the two philosophers gaze into each other’s eyes, as if to suggest this harmony. Borrowing from the language of Raphael ’s friend, Baldassare Castiglione, Raphael renders “the joining” of their souls. The monumental architecture of the scene, which echoes Bramante and has taproots in Piero della Francesca and Perugino, consists of three barrel-vaults beyond which we see patches of blue sky and puffs of cloud (fig. 2). The grandiose architecture of the image magnifies Raphael’s philosophers. Within this architectural framework, Plato’s gesture is deeply meaningful, since it prompts the viewer to look up and thus ascend toward the perfection of the celestial realm, beyond the imperfections of the physical world. Above the first barrel vault in the fresco we behold a section of the drum of a dome which is open to the sky. Within this section of drum there are two columns that are lined up directly... (shrink)

We investigate a system of two species exploiting a common resource. We consider both abiotic and biotic resources. We are interested in the asymmetric competition where a given consumer is the locally superior resource exploiter and the other is the locally inferior resource exploiter. They also interact directly via interference competition in the sense that LIE individuals can use two opposite strategies to compete with LSE individuals: we assume, in the first case, that LIE uses an avoiding (...) strategy, i.e. LIE individuals go to a non-competition patch to avoids competition with LSE individuals, and in the second one, LIE uses an aggressive strategy, i.e. being very aggressive so that LSE individuals have to go to a non-competition patch. We further assume that there is no resource in the non-competition patch so that individuals have to come back to the competition patch for their maintenance, and the migration process acts on a fast time scale in comparison with demography and competition processes. The models show that being aggressive is efficient for LIE’s survival and even provoke global extinction of the LSE and this result does not depend on the nature of resource. (shrink)

Kurt Gödel’s version of the Ontological Proof derives rather than assumes the crucial Possibility Claim: the claim that it is possible that something God-like exists. Gödel’s derivation starts off with a proof of the Possible Instantiation of the Positive: the principle that, if a property is positive, it is possible that there exists something that has that property. I argue that Gödel’s proof of this principle relies on some implausible axiological assumptions but it can be patched so that it only (...) relies on plausible principles. But Gödel’s derivation of the Possibility Claim also needs a substantial axiological assumption, which is still open to doubt. (shrink)

This article reports on a newly discovered bug in the original simulation argument. Two different ways of patching the argument are proposed, each of which preserves the original conclusion.

The "usual story" regarding molecular chemistry is that it is roughly an application of quantum mechanics. That is to say, quantum mechanics supplies everything necessary and sufficient, both ontologically and epistemologically, to reduce molecular chemistry to quantum mechanics. This is a reductive story, to be sure, but a key explanatory element of molecular chemistry, namely molecular structure, is absent from the quantum realm. On the other hand, typical characterizations of emergence, such as the unpredictability or inexplicability of molecular structure based (...) on quantum mechanics, do not characterize the relationship between molecular chemistry and quantum mechanics well either. A different scheme for characterizing reduction and emergence is proposed that accommodates the relationship between quantum mechanics and molecular chemistry and some initial objections to the scheme are considered. (shrink)

Herdt's Putting On Virtue has two chief aims. The first is to champion the virtue tradition against Christian moral quietism and modern deontological ethics. The second is to facilitate reconciliation between Augustinian and Emersonian virtue. To accomplish these tasks Herdt constructs a counter-narrative to Schneewind's Invention of Autonomy, in which Luther's resignation and Kant's innovation are tragic consequences of “hyper-Augustinianism”—a competitive conception of divine and human agency, which leads to excessive suspicion of acquired virtue. This review argues that Putting On (...) Virtue succeeds in its first aim but leaves its second intriguingly uncompleted. Despite this deficiency, however, this essay also argues that Putting On Virtue makes plausible Herdt's audacious suggestion that Augustinian and Emersonian perfectionism may be reconciled by bringing acquired and infused virtue under a single term. (shrink)

Ideal families defined on a cardinalk often exhibit reflection properties. IfC ⫅k is a club, for example, thenC∩α is a club-in-α club-in-k often. In this paper we generalize this notion to ideal families defined on℘ kλ and exhibit some examples.

A large number of articles have been devoted to the application of “texture synthesis” for large regions and “inpainting” algorithms for small cracks in an image. A new approach that allows the simultaneous filling in of different structures and textures is discussed in this present study. The combination of structure inpainting and patch-based texture synthesis carried out for filling and updating the target region shows additional advantages over earlier approaches. The algorithm discussed here uses the patch-based inpainting with isophote-driven patch-based (...) texture synthesis at the core. In this algorithm, once the user selects the regions to be restored, the algorithm automatically searches and fills in these regions with the best matching information surrounding them. We have assigned high priorities to the pixels on the boundary and the structure by computing data terms D, and the texture and corners are prioritized by computing the confidence C of the pixel. We also regularized and weighted the confidence of the pixels, RC, to achieve a balance of the two. The patch search area near the pixel patch to be filled is bounded for algorithm speed improvement. Patch-based filling significantly improve execution speed compared with pixel-based filling. Filling in is done in such a way that the structure information arriving at the region boundaries is propagated inside. A number of examples on real and synthetic images are used to demonstrate the effectiveness of the algorithm. Robustness with respect to the shape of the selected target region is also demonstrated. (shrink)