• Aggregates of previously isolated cells of Hydra are capable, under suitable solvant conditions, of regeneration forming complete animals. In a first stage, ecto- and endodermal cells sort out, producing the bilayered hollow structure characteristic of Hydra tissue; thereafter, heads are formed (even if the original cell preparation contained no head cells), eventually leading to the separation of normal animals with head, body column and foot. Hydra appears to be the highest type of organism that allows for regeneration of the (...) entire structure from random cell aggregates. The system is particularly useful for studying cell interactions, tissue polarity, pattern formation, and cell differentiation. (shrink)

It is usually the case that scientists examine either ecological systems or social systems, yet the need for an interdisciplinary approach to the problems of environmental management and sustainable development is becoming increasingly obvious. Developed under the auspices of the Beijer Institute in Stockholm, this new book analyses social and ecological linkages in selected ecosystems using an international and interdisciplinary case study approach. The chapters provide detailed information on a variety of management practices for dealing with environmental change. Taken as (...) a whole, the book will contribute to the greater understanding of essential social responses to changes in ecosystems, including the generation, accumulation and transmission of ecological knowledge, structure and dynamics of institutions, and the cultural values underlying these responses. A set of new (or rediscovered) principles for sustainable ecosystem management is also presented. Linking Social and Ecological Systems will be of value to natural and social scientists interested in sustainability. (shrink)

In this paper, we empirically explore some manifestations of norms for the conduct of science. We focus on scientific research ethics and report survey results from 606 scientists who received funding in 1993 and 1994 from the Division of Molecular and Cellular Biology of the Biology Directorate of the National Science Foundation. We also report results for 91 administrators charged with overseeing research integrity at the scientists’ research institutions. Both groups of respondents were presented with a set of scenarios, designed (...) by fractional factorial methods, describing different kinds of scientific conduct that in the eyes of some would likely be unethical. Respondents then were asked to evaluate each of these scenarios for how unethical the behavior might be and what kinds of sanctions might be appropriate. We use the responses to consider the nature of consensus around norms related to the practice of science and in particular, similarities and differences between scientists and science administrators. Implications for policy are also discussed. (shrink)

Educators are conflicted about whether school provides an appropriate space to teach ethics. Still, they want to develop the moral character of their students, and most of these efforts have used various citizenship values to address our frustration with students’ ‘lack of character’. Recently, a wave of work in the philosophy of education has rejuvenated discussion of Aristotelian virtue ethics, which forms the backbone for programmes that many schools are now adopting. Mark Jonas and Yoshiaki Nakazawa, however, argue that schools (...) should revisit Plato’s pedagogical methods, as well. If educators want to develop virtue in students, they need to understand the mechanism behind moral development. Guided by Plato, they argue that expert teachers use psychological, pedagogical, and philosophical reasoning to induce epiphanies in students, then guide them through virtue-oriented rehabituation. The goal of this article is to explore the legitimacy of Jonas and Nakazawa’s Platonic theory. I begin by describing the state of modern democratic education and its relationship to teaching ethics. I argue that character development is the appropriate route educators should take but that Jonas and Nakazawa’s theory only gives educators a partial understanding of how to do so. They give a plausible model for how our best educators are effective, but we are left wanting a much more robust, instructive picture. I suggest that we need a broader overhaul of the way we view education in a modern democratic society; character development must proceed from a different normative picture of the individual’s place in society. (shrink)

This paper examines the ontological commitments of the second-order language of arithmetic and argues that they do not extend beyond the first-order language. Then, building on an argument by George Boolos, we develop a Tarski-style definition of a truth predicate for the second-order language of arithmetic that does not involve the assignment of sets to second-order variables but rather uses the same class of assignments standardly used in a definition for the first-order language.

This article analyzes the influence that violence holds over a subject’s ability to remember and recall, specifically within the confines of Uwe Timm’s Am Beispiel meines Bruders. Timm attempts to understand the silence and erroneous remembrances of the perpetrator generation and their aversion to the acknowledgement of collective guilt. The discrepancies between intergenerational conceptions of the past are marked through the intertextual nature of Timm’s text; the sharp contrasts between the self-censored narratives of the narrator’s parents and the unexpurgated accounts (...) of the holocaust found in survivor testimonials force a reevaluation of the family’s private history. The war journal of the narrator’s deceased brother provides the crux for Timm’s conflation of private and public communications, and it underscores the text’s programmatic acknowledgement of violence and the institutionalization of this recognition as the fundamental basis for remembrance. The intertextual composition of Timm’s text is read as an affirmation of Habermas’s theory of communicative reason. (shrink)

How veridical is perception? Rather than representing objects as they actually exist in the world, might perception instead represent objects only in terms of the utility they offer to an observer? Previous work employed evolutionary modeling to show that under certain assumptions, natural selection favors such “strict‐interface” perceptual systems. This view has fueled considerable debate, but we think that discussions so far have failed to consider the implications of two critical aspects of perception. First, while existing models have explored single (...) utility functions, perception will often serve multiple largely independent goals. (Sometimes when looking at a stick you want to know how appropriate it would be as kindling for a campfire, and other times you want to know how appropriate it would be as a weapon for self‐defense.) Second, perception often operates in an inflexible, automatic manner—proving “impenetrable” to shifting higher‐level goals. (When your goal shifts from “burning” to “fighting,” your visual experience does not dramatically transform.) These two points have important implications for the veridicality of perception. In particular, as the need for flexible goals increases, inflexible perceptual systems must become more veridical. We support this position by providing evidence from evolutionary simulations that as the number of independent utility functions increases, the distinction between “interface” and “veridical” perceptual systems dissolves. Although natural selection evaluates perceptual systems only on their fitness, the most fit perceptual systems may nevertheless represent the world as it is. (shrink)

Between 1900 and 1925, the American economy witnessed a remarkably successful effort to upgrade competition through associations. Unlike the prevailing interpretation of American industrialization, in which associations fell prey to antitrust and collective action problems, we find many associations that reinvented themselves from cartels to developmental associations. This transition marked two previously unrecognized varieties in economic institutions. In the first, associations joined markets and corporate hierarchies to create variety in American capitalism. In the second, associations used deliberation, cost accounting, and (...) benchmarking to enhance productivity and create varieties of collective governance. This article explains the origins of developmental associations, outlines their principles, traces their implementation in the commercial printing industry, and surveys their distribution and performance effects across 344 industries. Based on these findings, we revise conventional institutionalist assumptions about order and agency to make room for institutional diversity and actors’ capacities for reflexivity and learning. (shrink)

Name der Zeitschrift: Der Islam Jahrgang: 93 Heft: 2 Seiten: 532-580.

Hydractinia echinata is a marine colonial hydroid, a relative of the more widely known Hydra. In contrast to Hydra, embryogenesis, metamorphosis and colony growth in Hydractinia are experimentally accessible and therefore, provide an ideal model system for investigating the biochemical basis of pattern formation. In particular, the processes involved in the transformation of the drop‐shaped freely swimming larva into a sessile tube‐shaped polyp are easily monitored, because this transfomation can be induced by application of various substances. Our results indicate that (...) the internal level of S‐adenosylmethionine (SAM), potentially the most important methyl donor in transmethylation processes, plays a key role in the onset of metamorphosis. It is also proposed that the internal level of SAM plays a pivotal role in the proportioning and spacing of polyps within the colony. (shrink)

This essay attempts to give substance to the claim that the liar''sparadox shows the truth predicate to be context sensitive. The aim ismodest: to provide an account of the truth predicate''s contextsensitivity (1) that derives from a more general understanding ofcontext sensitivity, (2) that does not depend upon a hierarchy ofpredicates and (3) that is able to address the liar''s paradox. Theconsequences of achieving this goal are not modest, though. Perhapssurprisingly, for reasons that will be discussed in the last section (...) ofthis essay, a natural account of the truth predicate''s contextsensitivity appears to lead naturally to a version of the correspondencetheory of truth according to which the truth predicate can be understoodas a relation holding between a sentence and a salient set of contexts.The plan of this essay is as follows. Section 1 contains a generalaccount of context sensitivity. The purpose of this section is toisolate certain features of context sensitivity and formal methods oftreating them, which we will then apply to the truth predicate. Section 2then outlines two minimal conditions to be satisfied by a truthpredicate. In Section 3, I present a version of the liar paradoxthat results from these conditions and the assumption that the truthpredicate is not context sensitive in the sense described in sectionone. Finally, in section four, I provide what appear to be naturalconsequences of a truth predicate''s context sensitivity. Section 4 isadmittedly speculative and points in the direction for future research. (shrink)

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Bu çalışmanın temel amacı 24 Şubat 2022’de başlayan Rusya–Ukrayna çatışmasında Avrupa merkezli medya organlarının ürettiği işgal söylemine eleştirel bir perspektifle yaklaşmaktır. Çalışmada Rusya’nın Ukrayna’yı işgal ettiğini öne süren ülkelerin Rus sanatçılara, sporculara ve yönetmenlere uyguladığı sert yaptırımlara yer verilmiş ve hemen sonrasında sosyal medyaya yansıyan bazı ifadeler eleştirel söylem analizi yöntemiyle incelenmiştir. 29 Nisan 2022 tarihinde Pentagon sözcüsü John Kirby’nin katıldığı bir basın toplantısında çatışmayı işgal söylemiyle sunarken aksi bir yaklaşımın etik ve ahlaka ters düşeceğini ima eden ifadesi etiğin de (...) eleştirel biçimde ele alınmasına zemin hazırlamıştır. Çalışmada Kant ve Hegel’in görüşleri üzerinden etik ve ahlak kavramlarının ayrıştırılması amaçlanırken bu filozofların bazı teorilerini Avrupa merkezci ve zaman zaman ırkçı bir bakış açısıyla kurguladığını savunan görüşlere de yer verilmiştir. Amaçsal örneklem yöntemiyle seçilen Eski Amerika başkanı George Bush’un katıldığı bir programda Ukrayna yerine Irak’ın işgal edildiğini belirten gafı ve eski Ukrayna başsavcı yardımcısı David Sakvarelidze’nin çatışma esnasında ölen Ukraynalılara sırf mavi gözlü ve sarı saçlı Avrupalılar oldukları için üzüldüğünü çağrıştıran açıklamaları üzerinden Avrupa merkezci ve ırkçı yaklaşımların günümüzdeki konumu sorgulanmıştır. Çalışmada başta ABD ve İngiltere olmak üzere bazı Avrupa ülkelerinin Rusya’nın Ukrayna’yı işgal ettiği söylemini, insan yaşamını önemseyen etik bir tavırdan ziyade politik bir refleksle ürettiği sonucuna ulaşılmıştır. (shrink)

Existential crises come in different flavors, but they're typically evoked by confrontations with mortality and accompanied by feelings of existential angst. The English philosopher Bernard Williams (1929–2003) argues that immortality would not be a good thing and that an endless life would become so excruciatingly and unbearably boring that all of us would want “out” at some point. This is exactly what happens in The Good Place. The idea that death makes life meaningful seems to be one of the major (...) moral lessons of The Good Place. Naturalists (about meaning) think that individual human lives can still be meaningful even if the human species wasn't created for a purpose. The Good Place seems to weigh in on the side of naturalism. The underlying message of existential crises in The Good Place is that the key to a meaningful life is to be a morally good person. (shrink)

Hidden within the office of the Secretary of War during World War II was a little-known agency called the Advisory Specialist Group. Strategically located between the laboratory, the factory, the battlefield, and civilian bureaucracy, the ASG solved the complex problem of reconciling new technologies and new military operations. In doing so, it combined incongruous domains of activity, contributed to Allied victory, and opened a channel to the problem-solving state. It is easy to overlook or misunderstand the ASG, because it was (...) born in processes, addressed problems, and took a form unfamiliar to historical institutionalists. Drawing on Padgett and Powell’s networked theory of organizational genesis and pragmatist theories of experimentalist governance, this article explains the ASG’s emergence, networked form, and experimentalist procedures. A founding moment for the problem-solving state, this case provides empirical and theoretical guidance to study its historical and ongoing evolution. (shrink)

Punishment and democracy appear to exacerbate each other’s worst features. The institutions and moral intuitions used to punish those that break the law can hollow out civic participation, distort the electorate, and undermine core democratic values. Likewise, many have argued the decentralized character of democracy is a key, albeit indirect, cause of increasingly punitive public policies that are divorced from any reasonable penological purpose. Given the effects of electoral politics, many have called for the separation, or general insulation, of state (...) punishment from public influence. However, recent empirical work on punitive attitudes and institutional design has begun to chip away at this common sense. This article contextualizes and qualifies the various mechanisms of policy feedback and public opinion formation thought by political theorists to undermine democratic participation in penal institutions and makes a normative case that insulating the public from penal law actively sustains injustice. (shrink)