The law of gravitation, an example of physical law The relation of mathematics to physics The great conservation principles Symmetry in physical law The distinction of past and future Probability and uncertainty: the quantum mechanical view of nature Seeking new laws.

Using everyday language, spatial concepts, visualizations and his renowned "Feynman diagrams," the author clearly and humorously communicates the substance and spirit of QED (quantum electodynamics).

The physical limitations, due to quantum mechanics, on the functioning of computers are analyzed.

Argumenta el autor que ciencia no es lo que han dicho los filósofos y tampoco lo que dicen las guías del profesor. ¿Qué es? Y afirma: durante toda mi vida he hecho ciencia y sé lo que es, pero me siento incapaz de decirlo. Y lo ejemplifica con el maravilloso número pi, diciendo: lo importante para mí no era el número, sino la idea de que existía un misterio. Pero finalmente se arriesga: dudar de la veracidad de lo que nos (...) es trasmitido del pasado y tratar de determinar ab initio nuevamente esas situaciones a partir de la experiencia, en vez de admitir las experiencias del pasado tal como nos llegan, esto es la ciencia. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 35.2 (2002) 153-174 [Access article in PDF] LSDNA: Rhetoric, Consciousness Expansion, and the Emergence of Biotechnology Richard Doyle I had to struggle to speak intelligibly. —Albert Hofmann on his self-experiment with LSD-25 Finding a place to start is of utmost importance. Natural DNA is a tractless coil, like an unwound and tangled audio tape on the floor of the car in the dark. —Kary Mullis (...) on the invention of Polymerase Chain Reaction 1. Undoing life What happened is this: Once upon a time there was a narrative of vitality. Ok, not a narrative, but an apprehension, a fear, a vision. It didn't have a beginning, middle, or end. It was. Its contours were no more determinable than those of consciousness. Indeed, our consciousness, as humans, was our sole alleged difference from it. From something called "life." We were more than life, but were also, tragically, confined to it. You know the story all too well. Some of its major authors were Cuvier, Lamarck, Darwin, Bichat. Even Shelley.Just because this sudden transformation happened on paper doesn't mean it was easy to endure. Enormous numbers of humans went on tranquilizers just to deal with the effects. Others, elsewhere, knew nothing but rumors. Nonetheless, they became increasingly implicated in its effects, the effects of understanding and experiencing both "life" and "consciousness" as informatic events. Suddenly—and it is sudden, a real surprise—both our vitality and our thought were distributed, scattered across a network and nowhere in particular. Timothy Leary and Francis Crick were speaking the same language, the language of information where the organic and the machinic enfold each other helically and, sometimes, the capacity for replication goes through the ceiling. This new language of information would [End Page 153] introduce a novel response and abyss: the pleasures and hells of eternal replication. The distribution of both life and consciousness enabled a dream of immortality from which we have not yet awakened, as the mere specter of infinite clonal replicants provokes entropies of identity even as it preserves the self from onslaughts of decay. 1In at least one of its characteristics this shift toward an informatic understanding of life is perhaps not really so novel. The seductions of control are hardly, historians of science tell us, foreign to the practices and effects of technoscience. Evelyn Fox Keller makes this point concisely and precisely in her not-quite eponymous essay, "From Secrets of Life to Secrets of Death," itself a self-professed sequel to her 1986 "Making Gender Visible." Here the scientific "impulse" is underwritten by a perennial motif that underlies much of scientific creativity, namely, the urge to fathom the secrets of nature and the collateral hope that, in fathoming the secrets of nature, we will fathom (and hence gain control of) our own mortality (Secrets, 29).Surely Keller is correct that the nascent practices of molecular biology were cryptographic in character, an espionage project unknowingly launched by Erwin Schrodinger during the Second World War. Surely it is crucial to this moment that while Schrodinger's 1943 Dublin lectures were introducing audiences to the concept of the code-script, Alan Turing again brilliantly decrypted a modified U-boat code, giving the Allies code superiority for the remainder of the war. 2 But in this segment on that strange growth called "biotechnology," I want to focus on what Keller has called the "collateral" of hope in this cryptographic impulse, namely the collateral equation between inquiry and control, specifically the control of mortality.For is "fathoming" a secret identical to the exercise of control? The very cadence and rhetorical encryption of Keller's formulation here, a general parenthetical syllogistic conclusion within and alongside a hyphenated invocation of particularity, suggest that concepts and practices of secrecy are more unstable than Keller implies with her invocation of Feynman's "disease" of lock picking: "One of my diseases, one of my things in life, is that anything that is secret, I try to undo" (40).For Keller, Feynman's confession is emblematic of a desire to control life and death... (shrink)

The quantum theory of decoherence plays an important role in a pragmatist interpretation of quantum theory. It governs the descriptive content of claims about values of physical magnitudes and offers advice on when to use quantum probabilities as a guide to their truth. The content of a claim is to be understood in terms of its role in inferences. This promises a better treatment of meaning than that offered by Bohr. Quantum theory models physical systems with no mention of measurement: (...) it is decoherence, not measurement, that licenses application of Born’s probability rule. So quantum theory also offers advice on its own application. I show how this works in a simple model of decoherence, and then in applications to both laboratory experiments and natural systems. Applications to quantum field theory and the measurement problem will be discussed elsewhere. (shrink)

During the Middle Ages there were all kinds of crazy ideas, such as that a piece of rhinoceros horn would increase potency. Then a method was discovered for separating the ideas -- which was to try one to see if it worked, and if it didn't work, to eliminate it. This method became organized, of course, into science. And it developed very well, so that we are now in the scientific age. It is such a scientific age, in fact, that (...) we have difficulty in understanding how witch doctors could ever have existed, when nothing that they proposed ever really worked -- or very little of it did. (shrink)

This essay is prompted, in part, by a spate of alarmist articles in the media over the past several years concerning what journalists have called "the creativity crisis,"2 articles claiming, in other words, that American creativity is in decline. A corresponding call has arisen to seek remedies and determine how creativity might be fostered in the lives of children so as to stem the tide of this (alleged) decline. While taking these dramatic concerns and pronouncements cum grano salis, this article (...) responds, nevertheless, by extracting a set of themes drawn from the childhoods of three individuals whose remarkable contributions to the disparate fields of science, classical music, and visual art are beyond.. (shrink)

As histories of nanotechnology are created, one question arises repeatedly: how influential was Richard Feynman’s 1959 talk, “There’s Plenty of Room at the Bottom”? It is often said by knowledgeable people that this talk was the origin of nanotech. It preceded events like the invention of the scanning tunneling microscope, but did it inspire scientists to do things they would not have done otherwise? Did Feynman’s paper directly influence important scientific developments in nanotechnology? Or is his paper (...) being retroactively read into the history of nanotechnology? To explore those questions, I trace the history of “Plenty of Room,” including its publication and republication, its record of citations in scientific literature, and the comments of eight luminaries of nanotechnology. This biography of a text and its life among other texts enables us to articulate Feynman’s paper with the history of nanotechnology in new ways as it explores how Feynman’s paper is read. (shrink)

As histories of nanotechnology are created, one question arises repeatedly: how influential was Richard Feynman’s 1959 talk, “There’s Plenty of Room at the Bottom”? It is often said by knowledgeable people that this talk was the origin of nanotech. It preceded events like the invention of the scanning tunneling microscope, but did it inspire scientists to do things they would not have done otherwise? Did Feynman’s paper directly influence important scientific developments in nanotechnology? Or is his paper (...) being retroactively read into the history of nanotechnology? To explore those questions, I trace the history of “Plenty of Room,” including its publication and republication, its record of citations in scientific literature, and the comments of eight luminaries of nanotechnology. This biography of a text and its life among other texts enables us to articulate Feynman’s paper with the history of nanotechnology in new ways as it explores how Feynman’s paper is read. (shrink)

Seven years after Richard Feynman died, I visited Caltech for the first time. One reason for the visit was to give a talk about the transactional interpretation of quantum mechanics, which draws so strongly on Feynman's own unusual ideas about the nature of electromagnetic radiation, now more than half a century old. It was, to say the least, an unusual feeling to be talking not just from the spot where Feynman himself used to lecture, but about (...) his own work. And when, during the question period at the end of the talk, the discussion moved on to QED, the dream-like quality of the occasion intensified -- an audience at Caltech, of all places, was asking me to explain QED to them! (shrink)

In 1949, Richard Feynman published the essentials of his solution to the recalcitrant problems that plagued quantum theories of electrodynamics of his days. The main problem was that the theory, that was considered to be correct and often led to correct observable consequences, also implied that some quantities should be infinite, while by common sense or empirical evidence they were finite. Feynman devised a method of solving the relevant theoretical equations in which particular combinations of elementary solutions (...) yielded empirically adequate results even when applied to complex problems. The combination of the basic solutions was guided by relatively simple graphical considerations... (shrink)

A selection of speeches and essays from the author's second decade as president of Yale University.

Thinking through the body: educating for the humanities -- The body as background -- Self-knowledge and its discontents: from Socrates to somaesthetics -- Muscle memory and the somaesthetic pathologies of everyday life -- Somaesthetics in the philosophy classroom: a practical approach -- Somaesthetics and the limits of aesthetics -- Somaesthetics and Burke's sublime -- Pragmatism and cultural politics: from textualism to somaesthetics -- Body consciousness and performance -- Somaesthetics and architecture: a critical option -- Photography as performative process -- Asian (...) ars erotica and the question of sexual aesthetics -- Philosophy as awakened life : everyday aesthetics of embodiment in American transcendentalism and Japanese Zen practice -- Somatic style. (shrink)

Most recent accounts of will-power have tried to explain it as reducible to the operation of beliefs and desires. In opposition to such accounts, this paper argues for a distinct faculty of will-power. Considerations from philosophy and from social psychology are used in support.

Most individuals realise that we have a moral obligation to avoid the evils of war. But this realization raises a host of difficult questions when we, as responsible individuals, witness harrowing injustices such as ""ethnic cleansing"" in Bosnia or starvation in Somalia. With millions of lives at stake, is war ever justified? And, if so, for what purpose? In this book, Richard J. Regan confronts these controversial questions by first considering the basic principles of just-war theory and then applying (...) those principles to historical and ongoing conflicts. Part One presents two opposing viewpoints: first, that war is not subject to moral norms and, second, that war is never morally permissible. The author rejects both perspectives, and moves to define the principles of just-war theory. He evaluates the roles of the president, Congress and, most importantly, the UN Security Council in determining when long-term US military involvement is justified. The moral limits of war conduct and the moral problem of using, or threatening to use, nuclear weapons are also discussed. On the just cause to wage war, Regan argues that defense of nations and nationals - whether in self-defense or in defense of others - remains the ""only"" classical cause that in the modern world would justify resorting to war. With respect to military intervention in secessionist and revolutionary wars, he contends that such intervention might be justified, but that prudence dictates extreme caution. In considering acceptable war conduct, Regan elaborates the specific principle of discrimination and proportionality; he maintains that civilians uninvolved in the enemy's war should not be directly targeted and that the costs of military action must be proportionate to the anticipated benefits of destroying military targets. The second part of the book presents case studies of eight historical wars - World War I, the Vietnam War, the Falklands War, the revolution and civil war in Nicaragua, the civil war in El Salvador, the Gulf War, the intervention in Somalia, and the Bosnian War - and poses several provocative questions about each. It invites readers and students to apply just-war principles to complex war-related situations and to understand the factual contingencies involved in moral judgements about war decisions. The book should be of particular interest to students of the moral issues of international relations and to readers interested more generally in philosophy, theology and political science. (shrink)

This book gives a descriptive analysis of specific Madhyamika texts. It compares the ideology of Kumarajiva (a translator of the four Madhyamika treatises 400 A.D.) with the ideologies of the three Chinese contemporaries - HuiYuan, Seng-Jui and Seng-Chao. It envisages an intercultural transmission of religious and philosophical ideas from India to China.

This is the third edition of a classic book first published in 1960, which has sold thousands of copies in two paperback edition and has been translated into several foreign languages. Popkin's work ha generated innumerable citations, and remains a valuable stimulus to current historical research. In this updated version, he has revised and expanded throughout, and has added three new chapters, one on Savonarola, one on Henry More and Ralph Cudworth, and one on Pascal. This authoritative treatment of the (...) theme of scepticism and its historical impact will appeal to scholars and students of early modern history now as much as ever. (shrink)

If aesthetics is both surface and depth, impassioned immediacy yet also critical distance of judgment, how can this doubleness be held together in one ...

Logical Forms explains both the detailed problems involved in finding logical forms and also the theoretical underpinnings of philosophical logic. In this revised edition, exercises are integrated throughout the book. The result is a genuinely interactive introduction which engages the reader in developing the argument. Each chapter concludes with updated notes to guide further reading.

The book begins with an overview that introduces the Theorem and the issues surrounding it, and explores how the essays that follow contribute to our understanding of those issues.

"Ce livre propose une enquête philosophique explorant le rapport à la mort dans nos sociétés. C’est une invitation à penser les liens humains à la fin de la vie. On évoque les liens intimes, mais également les liens sociaux encadrés par la loi. Dans un tel contexte, comment discerner les raisons anciennes et nouvelles convenant au bien de la cité? L’ouvrage s’adresse aux accompagnants en soins palliatifs. Il concerne également toute personne soucieuse pour elle-même et ses proches de réfléchir à (...) son voyage au bout de la vie. Nous sommes mortels, nous le savons et le fil de nos existences provoque des occasions de nous le rappeler. Dans la solitude de mourir s’inscrit l’appel à la compassion. Ainsi, pour les Grecs de l’Antiquité, l’image de la cigogne symbolisait la prise en charge des vieux par les jeunes, un signe de l’amitié politique. L’émergence de la culture palliative est intimement liée aux changements qui ont affecté l’évolution récente de la vie démocratique. Cette culture est née et s’est développée dans des circonstances politiques particulières. À l’observer, on peut déchiffrer certains codes de notre vie civique, ses aspirations, mais aussi ses ambiguïtés. Louis-André Richard propose d’examiner les questions actuelles en compagnie de Platon, d’Aristote, d’Augustin ou de Tocqueville. Grâce à eux, la philosophie, symbolisée par la sagesse de Minerve, est mise à contribution pour explorer la genèse et les métamorphoses de concepts comme la dignité et l’autonomie. Comment se déploie la dynamique de la raison et de la liberté à l’heure de notre mort? Tel est l’enjeu pour les roseaux pensants que nous sommes. Si notre frêle espèce appelle à la sollicitude de la cigogne, elle ne saurait négliger de convoquer aussi la sagesse de Minerve."--Résumé de l'éditeur. (shrink)

This paper discusses Frege's account of definition by induction in Grundgesetze and the two key theorems Frege proves using it.