Introduction of O2 to Earth's early biosphere stimulated remarkable evolutionary adaptations, and a wide range of electron acceptors allowed diverse, energy-yielding metabolic pathways. Enzymatic reduction of O2 yielded a several-fold increase in energy production, enabling evolution of multi-cellular animal life. However, utilization of O2 also presented major challenges as O2 and many of its derived reactive oxygen species are highly toxic, possibly impeding multicellular evolution after the Great Oxidation Event. Remarkably, ROS, and especially hydrogen peroxide, seem to play a major (...) part in early diversification and further development of cellular respiration and other oxygenic pathways, thus becoming an intricate part of evolution of complex life. Hence, although harnessing of chemical and thermo-dynamic properties of O2 for aerobic metabolism is generally considered to be an evolutionary milestone, the ability to use ROS for cell signaling and regulation may have been the first true breakthrough in development of complex life. The importance of Earth's oxygen cycle and reactive oxygen species produced on the evolution of complex life. The ability to detoxify oxygen species is not a trait that emerged as a response to increased O2 levels but rather crucial adaptation to the early Earth's weakly oxic microenvironments. (shrink)

Dans ce pays où, à la façon du Dictionnaire des idées reçues, il convient de tonner contre les méfaits de l’État jacobin, nul ne s’avise de savoir au juste comment celui-ci fonctionne ni ce qu’il fait. J’adopte en quelque sorte la position en miroir de l’idée reçue : je ne suis pas sûr de savoir ce qu’il faut penser de l’État en général, mais je sais empiriquement et en détails ce qu’il fait et comment il fonctionne. Je ne déduis pas (...) de proposition de réforme d’une théorie de l’État mais je tire de mon expérience l’idée d’une nouvelle façon d’agir ; je ne dessine pas la cité idéale mais je cherche ce qui pourrait faire revenir l’action dans l’institution. (shrink)

Dans cet article, je discuterai de l’idée selon laquelle l’École polytechnique au xixe siècle ne permettait pas aux acteurs (les élèves et les enseignants) de réaliser des travaux mathématiques originaux. En fait, plusieurs historien⋅ne⋅s pensent que les programmes d’examens empêchaient les élèves et les enseignants de prendre des initiatives. J’essayerai de nuancer cette idée, en prenant en compte plusieurs exemples liés à l’enseignement des équations numériques au cours du xixe siècle. Plus précisément, je présente dans cet article trois théorèmes attribués (...) à trois enseignants de l’École polytechnique et qui ont circulé parmi les élèves de l’École et parmi des milieux d’enseignement. Ces exemples sont intéressants car ils donnent des informations à propos de l’École polytechnique et à propos de l’enseignement et de l’apprentissage qui s’y pratiquaient. Ils permettent aussi de mieux connaître la façon dont la recherche de résultats mathématiques nouveaux pouvait, dans ce contexte, être liée à des activités pédagogiques et je vais expliquer comment ce lien a de nombreuses conséquences sur l’activité d’un enseignant comme Edmond Laguerre par exemple. (shrink)

Le livre que j'ai fait, ce n'est pas l'histoire de la philosophie, c'est un livre que j'aurai voulu faire avec0 (Michel Foucault), avec l'idée que j'ai de lui et mon admiration pour lui. Si ce livre avait pu avoir une valeur poétique, ç'aurait été ce que les poètes appellent un "tombeau". Gilles Deleuze, Pourparlers.

Part intellectual autobiography and part exposition of complex yet contemporary economic ideas, this lively conversation with renowned scholar and public intellectual Kenneth J. Arrow focuses on economics and politics in light of history, current events, and philosophy as well. Reminding readers that economics is about redistribution and thus about how we treat each other, Arrow shows that the intersection of economics and ethics is of concern not just to economists but for the public more broadly. With a foreword by Amartya (...) Sen, this book highlights the belief that government can be a powerful force for good, and is particularly relevant in the current political climate and to the lay reader as well as the economist. (shrink)

J. David Archibald explores how Darwin first came to the conclusion that species had evolved in different regions throughout the world. Carefully retracing Darwin's gathering of evidence and the evolution of his thinking, Origins of Darwin's Evolution achieves a new understanding of how Darwin crafted his transformative theory.

As a graduate student it was with great pleasure that I learned that John Watkins had decided to thank me publicly for helping him with a paper on Kuhn’s view.1 The help, such as I could give, was in Popper’s seminar, twenty-five years ago. Watkins himself, and several others, contributed much more to the seminar than I did. (The seminar was run on the principle — to repeat J.O. Wisdom’s quip — “thou shalt not speak whilst I interrupt”). Watkins was (...) not just kind but generous in thanking me and I appreciated it very much then, as a mere graduate student. But over the years, I find that I appreciate it even more, especially as I compare it with practice common among philosophers. It is ironic that by the time Watkins’ paper appeared (something resembling his view had by then already become the official reading of Kuhn’s views among philosophers of science) my own views about Kuhn’s book had changed. (shrink)

Taking Blair’s recent contribution to the debate about the triad as its starting point, the article discusses and challenges attempts to reduce the intricate relationship between rhetoric, dialectic and logic to a trichotomy with watertight compartments or to separate them with a single clear-cut criterion. I argue that efforts to pinpoint an essential difference, among the various typical differences partly grounded in disciplinary traditions, obscure the complexities within the fields. As a consequence, crosscutting properties of the fields as well as (...) the possibilities for theoretical bridging between them are neglected. (shrink)

High quality images sell products. Here's how you do it. From cereal boxes to billboards to photos on Amazon, product photos have a strong impact on viewers. Now you can master the secrets of effective product photography with this essential guide. Author J. Dennis Thomas guides you through the basics, from selecting the right equipment and practicing different lighting techniques to controlling exposure, using backgrounds and props, and much more. Whether it's jewelry, food, fashion, or other products, learn how to (...) photograph for effective selling, while building the skills and tools you need for a career. Explains how to produce quality photos for product or commercial photography, including fashion, food, jewelry, technology, and more The author is a professional photographer whose work has been published in major U.S. magazines including Rolling Stone, Elle, W Magazine, and US Weekly Covers choosing the right equipment, practicing different lighting techniques, controlling exposure, using backgrounds and props, and more Gives new and even experienced photographers the tools they need to build careers in product photography Take photographs that impress, intrigue, dazzle, and sell with The Art and Style of Product Photography. (shrink)

Burgess, J.P. and Rosen, G. Subject with No ObjectElliott, R.Faking Nature.

J.W. Olson addresses the Christian doctrine of revelation by asking how theological truth claims can possibly be rooted in God’s incarnational self-communication. Engaging with the phenomenology of Martin Heidegger, Olson offers an interpretation of the Eucharist that grounds Christian knowledge in an embodied understanding of the sacrament.

J. Krishnamurti was one of the most influential and widely known spiritual teachers of the twentieth century. Here, he inquires with the reader into how remembering and dwelling on past events, both pleasurable and painful, give us a false sense of continuity, causing us to suffer. His instruction is to be attentive and clear in our perceptions and to meet the challenges of life directly in each new moment.

Signs of mankind's solidarity, by J. R. Nelson.--Mankind, Israel and the nations in the Hebraic heritage, by M. Greenberg.--Christian insights from biblical sources, by C. Maurer.--Muhammad and all men, by D. Rahbar.--The impact of New World discovery upon European thought of man, by E. J. Burrus.--The effects of colonialism upon the Asian understanding of man, by J. G. Arapura.--Religious pluralism and the quest for human community, by S. J. Samartha.--From Confucian gentleman to the new Chinese 'political' man, by D. A. (...) Robinson.--The scientific revolution and the unity of man, by B. Towers.--Language and communication, by E. A. Nida.--Man and the son of man, by J. Moltmann.--The potentiality of conciliarity: communion, conscience, council, by W. B. Blakemore.--Oneness must mean wholeness, by J. R. Nelson. (shrink)

Open peer commentary on the target article “From Objects to Processes: A Proposal to Rewrite Radical Constructivism” by Siegfried J. Schmidt. Upshot: My suggestion is that the shift from objects to processes can be seen as grounded in the processes of self-generation common to all living organisms. Specifically human cognition is a subsequent evolutionary emergence.

The basic question today is: Can biblical theology do the job of revitalizing the Bible? And in the discussion around the Bible, is the alternative correct: biblical history or biblical kerygmatic theology? Are we, caught in this alternative, not responsible for the rejection of biblical studies today— for avoiding the heart of Bible, namely, the consideration of the validity of biblical religion for us today?