Physics, History, and the German Atomic Bomb. This paper examines the German concept of a nuclear weapon during National Socialism and the Second World War. Zusammenfassung: Physik, Geschichte und die deutsche Atombombe. Dieser Aufsatz untersucht die deutsche Vorstellung einer nuklearen Waffe während des Nationalsozialismus und des Zweiten Weltkrieges.

Following with the discovery of the electron by J. J. Thomson at the end of the nineteenth century a steady elucidation of the structure of the atom occurred over the next 40 years culminating in the discovery of nuclear fission in 1938–1939. The significant steps after the electron discovery were: discovery of the nuclear atom by Rutherford (Philos Mag 6th Ser 21:669–688, 1911 ), the transformation of elements by Rutherford (Philos Mag 37:578–587, 1919 ), discovery of artificial radioactivity (...) by Joliot-Curie and Joliot-Curie (Comptes Rendus Acad Sci Paris 198:254–256, 1934 ), and the discovery of the neutron by Chadwick (Nature 129:312, 1932a , Proc R Soc Ser A 136:692–708, 1932b ; Proc R Soc Lond Ser A 136:744–748, 1932c ). The neutron furnished scientists with a particle able to penetrate atomic nuclei without expenditure of large amounts of energy. From 1934 until 1938–1939 investigations of the reaction between a neutron and uranium were carried out by E. Fermi in Rome, O. Hahn, L. Meitner and F. Strassmann in Berlin and I. Curie and P. Savitch in Paris. Results were interpreted as the formation of transuranic elements. After sorting out complex radio-chemistry and radio-physics O. Hahn and F. Strassmann came to the conclusion, beyond their belief, that the uranium nucleus split into smaller fragments, that is nuclear fission. This was soon followed in 1939 by its theoretical interpretation by L. Mietner and O. Frisch. (shrink)

We provide a detailed history of the concepts of atomic number and isotopy before the discovery of protons and neutrons that draws attention to the role of evolving interplays of multiple aims and criteria in chemical and physical research. Focusing on research by Frederick Soddy and Ernest Rutherford, we show that, in the context of differentiating disciplinary projects, the adoption of a complex and shifting concept of elemental identity and the ordering role of the periodic table led to a relatively (...) coherent notion of atomic number. Subsequent attention to valency, still neglected in the secondary literature, and to nuclear charge led to a decoupling of the concepts of elemental identity and weight and allowed for a coherent concept of isotopy. This concept received motivation from empirical investigations on the decomposition series of radioelements and their unstable chemical identity. A new model of chemical order was the result of an ongoing collaboration between chemical and physical research projects with evolving aims and standards. After key concepts were considered resolved and their territories were clarified, chemistry and physics resumed autonomous projects, yet remained bound by newly accepted explanatory relations. It is an episode of scientific collaboration and partial integration without simple, wholesale gestalt switches or chemical revolutions. (shrink)

The breakthroughs that have had the most transformative practical impacts, from thermodynamics to the Internet. Physics informs our understanding of how the world works - but more than that, key breakthroughs in physics have transformed everyday life. We journey back to ten separate days in history to understand how particular breakthroughs were achieved, meet the individuals responsible and see how each breakthrough has influenced our lives. It is a unique selection. Focusing on practical impact means there is no (...) room for Stephen Hawking's work on black holes, or the discovery of the Higgs boson. Instead we have the relatively little-known Rudolf Clausius (thermodynamics) and Heike Kamerlingh Onnes (superconductivity), while Albert Einstein is included not for his theories of relativity but for the short paper that gave us E=mc2 (nuclear fission). Later chapters feature transistors, LEDs and the Internet. Finally we ask: what could the eleventh day be? - i.e. the greatest development yet to come. (shrink)

The development of nuclear weapons during the Manhattan Project is one of the most significant scientific events of the twentieth century. This revised and updated 3rd edition explores the challenges that faced the scientists and engineers of the Manhattan Project. It gives a clear introduction to fission weapons at the level of an upper-year undergraduate physics student by examining the details of nuclear reactions, their energy release, analytic and numerical models of the fission process, how critical masses (...) can be estimated, how fissile materials are produced, and what factors complicate bomb design. An extensive list of references and a number of exercises for self-study are included. Links are given to several freely-available spreadsheets which users can use to run many of the calculations for themselves. (shrink)

John Canaday, The Nuclear Muse: Literature, Physics, and the First Atomic Bombs. Madison: University of Wisconsin Press, 2000. Pp. xviii+310. ISBN 0-299-16854-9. £19.50.Septimus H. Paul, Nuclear Rivals: Anglo-American Atomic Relations 1941–1952. Columbus: Ohio State University Press, 2000. Pp. ix+266. ISBN 0-8142-0852-5. £31.95.Peter Bacon Hales, Atomic Spaces: Living on the Manhattan Project. Urbana and Chicago: University of Illinois Press, 1997. Pp. 448. ISBN 0-252-02296-3. £22.00.A decade after the end of the Cold War, the culture and technology of (...) class='Hi'>nuclear weapons had lost much of the overt sense of dread they once inspired. The decline in international tension following the end of the communist regimes of the Soviet bloc produced a massive shift in the ideology of the nuclear in the 1990s. The de-targeting and dismantling of large numbers of nuclear weapons and the demise of the threat of nuclear annihilation created new conditions both for international security and for the writing of nuclear history. With the declassification and release of large quantities of official documentation from the former adversaries, as well as the fiftieth anniversary of the bombings of Hiroshima and Nagasaki in 1995, a burst of histories of various aspects of the nuclear age have appeared over the last ten years, exploring not just the technopolitics, strategy and operational logistics of the Cold War and the arms race, but the cultural history of the nuclear age, its imagery, its architecture, its oppositional politics and its effects on the landscape, national and regional economies and cultures and indeed everyday life. At a time of global economic and political uncertainty and the emergent threat of capricious international terrorism and new nuclear proliferation, the apparent certainties of the Cold War now even evoke a certain nostalgia, and its artefacts and structures are being recast as ‘heritage’. (shrink)

The development of atomic bombs under the auspices of the U.S. Army's Manhattan Project during World War II is considered to be the outstanding news story of the twentieth century. In this book, a physicist and expert on the history of the Project presents a comprehensive overview of this momentous achievement. The first three chapters cover the history of nuclear physics from the discovery of radioactivity to the discovery of fission, and would be ideal for instructors of a (...) sophomore-level "Modern Physics" course. Student-level exercises at the ends of the chapters are accompanied by answers. Chapter 7 covers the physics of first-generation fission weapons at a similar level, again accompanied by exercises and answers. For the interested layman and for non-science students and instructors, the book includes extensive qualitative material on the history, organization, implementation, and results of the Manhattan Project and the Hiroshima and Nagasaki bombing missions. The reader also learns about the legacy of the Project as reflected in the current world stockpiles of nuclear weapons. This second edition contains important revisions and additions, including a new chapter on the German atomic bomb program and new sections on British and Canadian contributions to the Manhattan project and on feed materials. Several other sections have been expanded; reader feedback has been helpful in introducing minor corrections and improved explanations; and, last but not least, the second edition includes a detailed index. (shrink)

The Second Creation is a dramatic--and human--chronicle of scientific investigators at the last frontier of knowledge. Robert Crease and Charles Mann take the reader on a fascinating journey in search of "unification" with brilliant scientists such as Niels Bohr, Max Planck, Albert Einstein, Erwin Schrödinger, Richard Feynman, Murray Gell-Mann, Sheldon Glashow, Steven Weinberg, and many others. They provide the definitive and highly entertaining story of the development of modern physics, and the human story of the physicists who set out (...) to find the "theory of everything.". (shrink)

By 1933, the class of generally accepted elementary particles comprised the electron, the photon, the proton as well as newcomers in the shape of the neutron, the positron, and the neutrino. During the following decade, a new and poorly understood particle, the mesotron or meson, was added to the list. By paying close attention to the names of these and other particles and to the sometimes controversial proposals of names, a novel perspective on this well-researched line of development is offered. (...) Part of the study investigates the circumstances around the coining of “positron” as an alternative to “positive electron.” Another and central part is concerned with the many names associated with the discovery of what in the late 1930s was generally called the “mesotron” but eventually became known as the “meson” and later again the muon and pion. The naming of particles in the period up to the early 1950s was more than just a matter of agreeing on convenient terms, it also reflected different conceptions of the particles and in some cases the uncertainty regarding their nature and relations to existing theories. Was the particle discovered in the cosmic rays the same as the one responsible for the nuclear forces? While two different names might just be synonymous referents, they might also refer to widely different conceptual images. (shrink)

Using an original approach, Mauro Dardo recounts the major achievements of twentieth-century physics--including relativity, quantum mechanics, atomic and nuclear physics, the invention of the transistor and the laser, superconductivity, binary pulsars, and the Bose-Einstein condensate--as each emerged. His year-by-year chronicle, biographies and revealing personal anecdotes help bring to life the main events since the first Nobel Prize was awarded in 1901. The work of the most famous physicists of the twentieth century--including the Curies, Bohr, Heisenberg, Einstein, Fermi, (...) Feynman, Gell-Mann, Rutherford, and Schrödinger--is presented, often in the words and imagery of the prize-winners themselves. Mauro Dardo is Professor of Experimental Physics at Amedeo Avogadro University. He has served as Dean of the new Faculty of Sciences at the University of Turin in Alessandria, Piedmont, and has also served as Director of the university's new department of Sciences and Advanced Technologies. (shrink)

The article соnsiders the socio-cultural aspects of the standard model (SM) in elementary particle physics and history of its creation. SM is a quantum field gauge theory of electromagnetic, weak and strong interactions, which is the basis of the modern theory of elementary particles. The process of its elaboration covers a twenty-year period: from 1954 (the concept of gauge fields by C. Yang and R. Mills) to the early 1970s., when the construction of renormalized quantum chromodynamics and electroweak theory (...) wеre completed. The socio-cultural aspects of SM are explored on the basis of a quasi-empirical approach, by studying the texts of its creators and participants in the relevant events. We note also the important role of such an “external” factor as large-scale state projects on the creation of nuclear and thermonuclear weapons, which provided personnel and financial support for fundamental research in the field of nuclear physics and elementary particle physics (the implementation of thermonuclear projects took place just in the 1950s, and most of the theorists associated with the creation of SM were simultaneously the main developers of thermonuclear weapons, especially in the USSR). The formation of SM is considered as a competition between two research programs (paradigms) – gauge-field and phenomenological, associated with the rejection of the field concept. The split of the scientific community of physicists associated with this competition is going on during this period. It’s accompanied by a kind of “negotiations”, which in the early 1970s lead to the triumph of the gauge field program and the restoration of the unity of the scientific community. The norms and rules of the scientific ethos played the regulatory role in this process. The scientific-realistic position of the metaphysical attitudes of the majority of theorists and their negative attitude to the concepts of philosophical relativism and social construction of scientific knowledge are emphasized. Some features of the history of SM creation are also noted, such as the positive role of aesthetic judgments; “scientific-school” form of research (in the USSR), its pros and cons; a connection to historical-scientific “drama of ideas” with “dramas of people” who made a wrong choice and (or) “missed their opportunities”. (shrink)

The first nuclear engineers emerged from the Manhattan Project in the USA, UK and Canada, but remained hidden behind security for a further decade. Cosseted and cloistered by their governments, they worked to explore applications of atomic energy at a handful of national labs. This unique bottom-up history traces how the identities of these unusually voiceless experts - forming a uniquely state-managed discipline - were shaped in the context of pre-war nuclear physics, wartime industrial management, post-war politics (...) and utopian energy programmes. Even after their eventual emergence at universities and companies, nuclear workers carried the enduring legacy of their origins. Their shared experiences shaped not only their identities, but our collective memories of the late twentieth century. And as illustrated by the Fukushima accident seven decades after the Manhattan project began, this book explains why they are still seen conflictingly as selfless heroes or as mistrusted guardians of a malevolent genie. (shrink)

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be (...) preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

This paper keeps pace with my personal history as a researcher: starting from the eagerness for knowledge of the nuclear physics PhD student I once was, continuing with my search for social relevance in policy-preparatory research I subsequently performed as a sustainability scholar, it finally leads to the topics of interest for the hybrid philosophy-sociology researcher I am today. Following these traces, I first of all rethink my life as a physicist in terms of science as a necessarily (...) situated and engaged practice before laying bare the baleful scientisation of politics in sustainability discourse. Finally, I sketch the contours of a genuine politics of sustainability by repositioning the enigma of scientific production at the heart of its practice. (shrink)

A history of the study of unseen sciences told through the pioneering work of the men who contributed to our understanding of heat, light, electrical, mechanical, and nuclear energies.

The second half of the twentieth century offers distinct perspectives for the historian of science. The role of the State, the expansion of certain industries and the cultural engagement with science were all transformed. The foregrounding of certain strands of physical science in the public and administrative consciousness – nuclear physics and planetary science, for example – had a complement: the ‘backgrounding’ or institutional neglect of a number of other fields. My work in the history of the physical (...) sciences has focused on this little-noticed intellectual terrain, and could be categorised into several types of case study that share distinct research questions, conceptual understandings and historiographical ramifications. -/- My focus is physical sciences that have been identified as peripheral, if categorised at all, by a previous generation of historians of physics. By this I do not mean peripheral in the geographic sense, but marginal, interstitial or boundary-crossing in the context of occupations, disciplines and professions. The types of case study investigated include (i) scientific instruments; (ii) emergent professions or would-be professions; and, (iii) subject areas falling between academic science, industrial application and State interests. (shrink)

Quantum mechanics is humanity's finest scientific achievement. It explains why the sun shines and how your eyes can see. It's the theory behind the LEDs in your phone and the nuclear hearts of space probes. Every physicist agrees quantum physics is spectacularly successful. But ask them what quantum physics means, and the result will be a brawl. At stake is the nature of the Universe itself. What does it mean for something to be real? What is the (...) role of consciousness in the Universe? And do quantum rules apply to very small objects like electrons and protons, but not us? In What is Real?, Adam Becker brings to vivid life the brave researchers whose quest for the truth led them to challenge Bohr: David Bohm, who picked up Einstein's mantle and sought to make quantum mechanics deterministic, all while being hounded by the forces of McCarthyism; Hugh Everett, who argued that everything, big and small, must be governed by the same rules; and John Bell, who went to great lengths to eradicate the power of the god-like observer from the core of quantum physics. And they paid dearly, their reputations, careers, and sometimes lives ruined completely. But history has been kinder to them than their contemporaries were. As Becker shows, the brave intellectual giants have inspired a growing army of physicists and philosophers intent both on making a philosophically more satisfying theory of the universe and a more useful one as well. A gripping story of some of humanity's greatest ideas and the high cost with which many have pursued them, What is Real? is intellectual history at its passionate best. (shrink)

This book presents the proceedings of the 2nd Karl Schwarzschild Meeting on Gravitational Physics, focused on the general theme of black holes, gravity and information. Specialists in the field of black hole physics and rising young researchers present the latest findings on the broad topic of black holes, gravity, and information, highlighting its applications to astrophysics, cosmology, particle physics, and strongly correlated systems.

Contains revelations on how the quest for unity has driven all the great breakthroughs in science and shows how the Greeks searched for the fundamental element in all things.

The term Monte Carlo method indicates any computer-aided procedure for numerical estimation that combines mathematical calculations with randomly generated numerical input values. Today it is an important tool in high energy physics while physicists and philosophers also often consider it a sort of virtual experiment. The Monte Carlo method was developed in the 1940s, in the context of U.S. American nuclear weapons research, an event often regarded as the origin of both computer simulation and “artificial reality” (Galison 1997). (...) The present paper interrogates this strong claim by focusing on the emergence of Monte Carlo event generators in particle physics in the early 1960s. This historical case study shows how, as Monte Carlo computation became part of the toolbox of particle physicists around 1960, it was neither usually referred to as a “computer simulation” nor was it regarded as a surrogate for experimentation. In revising the history of this method, this paper asks, in what context did particle physicists of the 1960s decide to create FAKE, the first high-energy-physics Monte Carlo event simulator? What was their goal? And what epistemic role did FAKE play? In answering these questions, it is argued that Monte Carlo computations were not introduced into particle physics to simulate experiments, but rather they played the role of theoretical tools. The Monte Carlo method was able to do this thanks to its random component, a property which provided a means of modeling a specific phenomenon, so-called “(particle) resonances”. Indeed, in doing so, event generators even came to mutually assimilate and reshape the notions of particle and resonance, taking up an epistemic function which had previously been confined to physical-mathematical formulae: that of a medium which could express aspects of particle theory. (shrink)

Sandia National Laboratories, located in Albuquerque, New Mexico, was originally a part of Los Alamos Laboratory. In 1949, AT&T agreed to manage Sandia, which they did for the next 44 years. During those Cold War years, Sandia was the prime weapons engineering laboratory for Los Alamos and Lawrence Livermore. As such, it bore prime responsibility for designing and adapting nuclear weapons for the military services' delivery systems, and ensuring the safety and reliability of the stockpile. The Labs' history has (...) been unevenly documented, hindered by the secret nature of its work and the desire of management to maintain a low public profile. There have been three history programs at Sandia: a restricted history published internally in 1963; another history program in the early 1980s that resulted in a history of the Labs' first decade; and the current history program dating from the mid-1990s, which has published a general history and several monographs. This article discusses the challenges and problems inherent in documenting the history of a national weapons laboratory during the last 50 years. (shrink)

Solid state physics, the study of the physical properties of solid matter, was the most populous subfield of Cold War American physics. Despite prolific contributions to consumer and medical technology, such as the transistor and magnetic resonance imaging, it garnered less professional prestige and public attention than nuclear and particle physics. Solid State Insurrection argues that solid state physics was essential to securing the vast social, political, and financial capital Cold War physics enjoyed in (...) the twentieth century. Solid state’s technological bent, and its challenge to the “pure science” ideal many physicists cherished, helped physics as a whole respond more readily to Cold War social, political, and economic pressures. Its research kept physics economically and technologically relevant, sustaining its cultural standing and policy influence long after the sheen of the Manhattan Project had faded. (shrink)

The history and philosophy of science are destined to play a fundamental role in an epoch marked by a major scientific revolution. This ongoing revolution, principally affecting mathematics and physics, entails a profound upheaval of our conception of space, space–time, and, consequently, of natural laws themselves. Briefly, this revolution can be summarized by the following two trends: by the search for a unified theory of the four fundamental forces of nature, which are known, as of now, as gravity, electromagnetism, (...) and strong and weak nuclear forces; by the search for new mathematical concepts capable of elucidating and therefore explaining such a relationship. In fact, the first search is essentially dependent on the second; that is to say, that in order for a new theory of physics to come to light, the development of a deeper geometric theory capable of explaining the structure of space–time on a quantum scale appears to be necessary. On careful consideration, we notice that both of these developments converge in the direction of a unitary and fundamental tendency of modern science—which is the geometrization of theoretical physics and of natural sciences. This new emergent situation carries within it a profound conceptual change, affecting the way in which relations are conceived of, first and foremost, between mathematics and physics. This new paradigm can be summed up by the intimately interdependent points: the immense variety of physical phenomena and of natural forms follows from the equally infinite variety of geometric and topological objects that can be made out in space and from which space is made up; the second point, which ensues from the former one and which is of great historical and epistemological significance, is that mathematics is involved in rather than applied to phenomena. In other words, phenomena are effects that emerge from the geometrical structure of space–time. There is no doubt that this new conception of the relationship between the universe of mathematical ideas and objects and the world of natural phenomena is the true scientific revolution of our century, of great conceptual importance, and consequently, capable of changing our view of science and of nature at one and the same time. It is all at once of a scientific, philosophical and aesthetic order. (shrink)

These proceedings collect the selected contributions of participants of the First Karl Schwarzschild Meeting on Gravitational Physics, held in Frankfurt, Germany to celebrate the 140th anniversary of Schwarzschild's birth. They are grouped into 4 main themes: I. The Life and Work of Karl Schwarzschild; II. Black Holes in Classical General Relativity, Numerical Relativity, Astrophysics, Cosmology, and Alternative Theories of Gravity; III. Black Holes in Quantum Gravity and String Theory; IV. Other Topics in Contemporary Gravitation. Inspired by the foundational principle (...) ``By acknowledging the past, we open a route to the future", the week-long meeting, envisioned as a forum for exchange between scientists from all locations and levels of education, drew participants from 15 countries across 4 continents. In addition to plenary talks from leading researchers, a special focus on young talent was provided, a feature underlined by the Springer Prize for the best student and junior presentations. (shrink)

Fifteen to twenty years ago one might have been forgiven for thinking that both the philosophy and history of science constituted specialized academic backwaters, far removed from debates in the forefront of either philosophic or public attention. But times have changed; science and technology have in many ways and in many guises become central foci of public debate, whether through concern over nuclear safety, the massive price to be paid for continued research in areas such as high energy (...) class='Hi'>physics, the cost of high technology medicine, the spectre of genetic engineering, or the wonders of information processing and the computer revolution. At the same time that there is public questioning of the authority of expert scientific pronouncements and debate about the wisdom of courses of action proposed in the name of technology and progress, there is political pressure to direct eduction in an increasingly scientific and technological direction. But even so, in this country, the history and philosophy of science remain peripheral disciplines, not only in relation to the total academic scene but even in relation to philosophy, which is itself being academically marginalized. (shrink)

This title provides an overview of the atomic nucleus and the theories that seek to explain it. Bringing together a systematic explanation of hadrons, nuclei, and stars for the first time, the author provides the core material needed by students of physics to acquire a solid understanding of nuclear and particle science.

The present article considers Giulio Racah’s contributions to general physical theory and his establishment of theoretical physics as a discipline in Israel. Racah developed mathematical methods that are based on tensor operators and continuous groups. These methods revolutionized spectroscopy. Currently, these are essential research tools in atomic, nuclear and elementary particle physics. He himself applied them to modernizing theoretical atomic spectroscopy. Racah laid the foundations of theoretical physics in Israel. He educated several generations of Israeli physicists, (...) and put Israel on the world map of physics. (shrink)

Periodic tables (PTs) are the ‘ultimate paper tools’ of general and inorganic chemistry. There are three fields of open questions concerning the relation between PTs and physics: (i) the relation between the chemical facts and the concept of a periodic system (PS) of chemical elements (CEs) as represented by PTs; (ii) the internal structure of the PS; (iii)␣The relation between the PS and atomistic quantum chemistry. The main open questions refer to (i). The fuzziness of the concepts of chemical (...) properties and of chemical similarities of the CE and their compounds guarantees the autonomy of chemistry. We distinguish between CEs, Elemental Stuffs and Elemental Atoms. We comment on the basic properties of the basic elements. Concerning (ii), two sharp physical numbers (nuclear charge and number of valence electrons) and two coarse fuzzy ranges (ranges of energies and of spatial extensions of the atomic orbitals, AOs) characterize the atoms of the CEs and determine the two-dimensional structure of the PS. Concerning (iii), some relevant ‘facts’ about and from quantum chemistry are reviewed and compared with common ‘textbook facts’. What counts in chemistry is the whole set of nondiffuse orbitals in low-energy average configurations of chemically bonded atoms. Decisive for the periodicity are the energy gaps between the core and valence shells. Diffuse Rydberg orbitals and minute spin–orbit splittings are important in spectroscopy and for philosophers, but less so in chemical science and for the PS. (shrink)

Fifteen to twenty years ago one might have been forgiven for thinking that both the philosophy and history of science constituted specialized academic backwaters, far removed from debates in the forefront of either philosophic or public attention. But times have changed; science and technology have in many ways and in many guises become central foci of public debate, whether through concern over nuclear safety, the massive price to be paid for continued research in areas such as high energy (...) class='Hi'>physics, the cost of high technology medicine, the spectre of genetic engineering, or the wonders of information processing and the computer revolution. At the same time that there is public questioning of the authority of expert scientific pronouncements and debate about the wisdom of courses of action proposed in the name of technology and progress, there is political pressure to direct eduction in an increasingly scientific and technological direction. But even so, in this country, the history and philosophy of science remain peripheral disciplines, not only in relation to the total academic scene but even in relation to philosophy, which is itself being academically marginalized. (shrink)

ArgumentThis article describes the efforts of one fifty-year-old nuclear physics research center to stay relevant as the boundaries of nuclear physics have expanded and distributed collaborations have become increasingly common. In adapting to these shifts, SENSE, a university-based institute in the United States, has seen notable changes in power relations, forms of legitimation, and social structures. This article recognizes and investigates these changes through an interpretative investigation of four common media objects incorporated into research practice at (...) the institute: collaboration wikis, telephones, computer simulations, and government reports. In doing so, this article adopts an approach from media studies through which hard-to-see changes in social and cultural life can be investigated by observing media objects in research practice. Ultimately, this article tells the story of a research organization and an entire discipline working to adapt to a rapidly changing scientific landscape. (shrink)

In The Logic of Life, François Jacob reconstructed the history of heredity from the seventeenth century to the present, emphasizing the role of physics in the development of biology. Quantum mechanics provided questions, methods, and techniques to molecular biologists. In the 1960s, physics also provided the organizational model. Jacob worked on the creation of the European Molecular Biology Laboratory, on the model of CERN (European Organization for Nuclear Research). I argue that reflection on the relation between molecular (...) biology and physics played a part in the making of The Logic of Life. Between the mid-1960s and the early 1970s, Jacob focused on relations between the “genealogy” of his molecular biology work and the development of physics at scientific, institutional, and historical levels. He thus brought molecular biology to the attention of a larger public, following the history of the Institut Pasteur, whose public mission had to be reaffirmed to grant its survival. With The Logic of Life, Jacob became an influential intellectual who engaged with scholars in human sciences. He promoted his view of the development of molecular biology as a model for a possible new discipline: bioanthropology. (shrink)

La physique moderne est réputée absconse, imprévue, irrespectueuse, rebondissante. Il s'agit pourtant d'un domaine passionnant, qui peut être compris par tous quand il est replacé dans une perspective historique. C'est ce que propose ce livre, qui présente une histoire des concepts principaux de la physique contemporaine et leur genèse à partir des grandes ruptures du début du siècle, avec quelques incursions dans le passé plus lointain. On y trouvera une présentation claire des concepts essentiels, remplacés dans le contexte de leur (...) création. En effet, la science ne résulte pas, comme on le dit trop souvent, d'un enchaînement de mécanismes inévitables : elle est faite de créations individuelles, qui s'ajoutent, se contredisent et se répondent. Les principaux physiciens du siècle s'entrecroisent ainsi dans ce livre en de multiples occasions. Une présentation de l'histoire des grandes théories que sont la relativité et la théorie quantique, ainsi que celle de l'univers fascinant que constitue la physique des particules complètent cet ouvrage. L'auteur n'a pas cherché à être exhaustif, car il a voulu privilégier l'accès au plus grand nombre de lecteurs possibles des concepts essentiels. Les chapitres sont découpés en périodes historiques, permettant de mettre en évidence la longue quête des physiciens pour une théorie unificatrice des lois de l'univers. Ce livre s'adresse au grand public désireux de comprendre les idées fondamentales qui agitent encore aujourd'hui le monde scientifique. (shrink)

The creation of QCD is one of greatest achievements in the history of science. It has radically changed our conception of the fundamental ontology of the physical world and its underlying dynamics. What it has discovered are more than new particles and a new force, but rather a deeper level of physical reality, a new kind of entities. Dynamically, the strong nuclear forces are no longer taken to be fundamental, but are relegated to the status of the un-cancelled residue (...) of far stronger long range force mediated by gluon. From a long term perspective, perhaps more important than these discoveries is that it breaks a new path to explore many novel features of an unknown layer of the physical world, such as instanton, the theta vacuum and effective energy. The notion of effective energy allows us to conceptualize the mysterious quantum number flow and hadronization. Although the metaphysical status of effective energy is not quite clear at this moment, but a window is open for conceptualizing the physical world that is in complex processes of transmutations in a unified way. (shrink)