Plant succession is a phenomenon ascribed to vegetation dynamics at the scale of the plant community. The study of plant succession implies the analysis of the species involved and their relationships. Depending on the research done, the characteristics of trees have been studied according to either static, dimensional or partial approaches. We have revised the principal theories of succession, the methods of describing structure and development of tree and relationship established between tree species' attributes and their successional status. During studies (...) of succession, we propose that the profile of plant species be completed by including the organizational attributes of their structure as well as their development dynamics. We suggest an approach to the architecture that gives a general overview of the mode of development, revealing, among other things, that a limited number of architectural models may be found in nature. We hypothesize that community dynamics, in succession, may to a certain degree arise from the dynamic nature of plant development. This line of reasoning is in accordance with the current school of thought on process structuralism. (shrink)

On dit depuis longtemps que l'image visuelle est un langage. Mais ne s'agit-il là que d'un slogan? Ce langage a-t-il des mots? A-t-il une syntaxe? S'écrit-il? Se subdivise-t-il en langues? Permet-il ce jeu sur les formes et le sens qu'on appelle rhétorique? C'est ce qu'on ne savait guère jusqu'ici.

La présente contribution s’insère dans un travail de plus grande envergure, visant à mettre en lumière les fondements naturels d’une théorie du sens. Dans une telle théorie, on distingue un double mouvement d’anasémiose et de catasémiose. C’est durant le premier que divers mécanismes produisent le sens, sur la base des interactions entre les êtres vivants et les stimulations provenant du monde. Nous nous focaliserons sur le second mouvement, au cours de laquelle le sens permet — voire produit — l’action sur (...) le monde. Or il se fait que l’action sur le monde par les signes, vecteurs du sens, est le domaine d’étude de la pragmatique. Dans notre article, nous confronterons les conceptions classiques de la pragmatique et celles qui découlent de notre approche physicaliste de la catasémiose. (shrink)

The basic principles of scientific research from the great French physiologist whose contributions in the 19th century included the discovery of vasomotor nerves; nature of curare and other poisons in human body; more.

Contribution à l'histoire culturelle des conceptions et des mentalités. Entre Paracelse et Montaigne, un panorama, à travers les oeuvres marquantes, de la logique et de la pratique de la faculté imaginative durant cette époque fertile en recommencements. [SDM].

Kant prit pour pivot de la révolution copernicienne l'immutabilité d'une table qui portait toute l'autorité du classicisme et révélait les opérations secrètes d'un sensus communis logicus. La logique n'avait pas d'histoire. Après la rupture introduite par la logique mathématique et pour la conjurer, on s'est intéressé à son histoire comme présentant autant de variétés d'une même forme. Mais la forme, terme homonyme entre l'eidos platonicien et la syntaxe moderne, gardait l'écorce sans le fruit, oubliant que l'héritage grec avait fructifié ailleurs, (...) dans les arts et dans les sciences et vivait précisément de ses métamorphoses. Le projet de Platon, accompli par le stoïcisme, donne la mesure de l'héritage athénien. L'épisode ouvert par Frege laissait un tout autre avenir que de choisir entre la formalisation ou le silence. Car la logique mathématique, liée à l'histoire de l'algèbre et de la calculabilité, ménageait la place pour une activité philosophique délivrée à son tour des opérations obscures du sens commun et consciente de ses symbolismes. Ce qui redonne sens aux réformes de l'entendement, opération philosophique essentielle et constante, contre les méthodes supposées régir toutes les manières de la connaissance. Cette autre histoire se trame de Port-Royal, à d'Alembert, Wittgenstein, Cavaillès et Merleau-Ponty. La connaissance s'y trouve servie par la diversité de ses supports, y compris styles et syntaxes, tous inscrits sur le palimpseste des opérations inconscientes qui précèdent toute épistémologie. (shrink)

A work of art can be defined as a section of space that has been assigned a particular status. It is not our intention to define this status—philosophical aesthetics has been addressing this issue for centuries. Rather, we aim to pinpoint the mechanisms in virtue of which this section of space is isolated and bestowed with the status in question. Such a move requires the action of a certain instance—hence the emphasis we put on the interactive character of the process. (...) We shall pay particular attention to the type of sign called ‘index,’ which plays a pivotal role in this affair. (shrink)

Al-Jazeera and other satellite television stations have transformed Arab politics over the last decade.

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:The Historiography of Philosophy by Michael FredeClaude PanaccioMichael Frede. The Historiography of Philosophy. Edited by Katerina Ierodiakonou, with a postface by Jonathan Barnes. Oxford: Oxford University Press, 2022. Pp. 256. Hardback, $80.00.From the 1970s until his tragic death in 2007, Michael Frede was one of the most prominent scholars in ancient Greek philosophy, with landmark contributions to the study of Aristotle and of Hellenistic thought in particular. This (...) volume contains his theoretical reflections on the work of historians of philosophy. The main part of the book reproduces with minor corrections the previously unpublished text of the Nellie Wallace Lectures that Frede gave in 1989–90 in Oxford (1–135). Then come three papers that he published on pretty much the same topic between 1987 and 1992 (137–88). Jonathan Barnes's postface, finally, launches an exciting discussion of Frede's proposals by raising a number of questions and critical remarks about them (189–230).Frede's main claim throughout the book is that there is, and should be, a distinctively historical approach to the history of philosophy that has not yet been sufficiently recognized as such in the academic world. This is not to say that he considers more philosophical approaches to be illegitimate. His point is that we have to be clear about the distinction and what it involves in terms of requirements and methods. What Frede calls the "historical history of philosophy" is thus contrasted by him with two varieties of philosophical approaches. One of them he identifies as the "philosophical history of philosophy." It consists in retrospectively studying the past of philosophy as a kind of maturation toward some more recent doctrinal stage, as Aristotle or Hegel saliently did with their respective predecessors. Frede takes this to be "a perfectly intelligible and legitimate, though perhaps not particularly interesting or fruitful, enterprise" (41). Most of the time, he thinks, it would be led by its own philosophical presuppositions to be too selective and to provide a badly distorted picture of past philosophy.Frede is much more sympathetic to the other philosophical approach to the history of philosophy he acknowledges, the one he calls "doxography." This is the study of past philosophers with the aim of finding something of interest in them for ongoing philosophical discussions—a familiar practice, indeed, in the philosophical discipline as we know it. There is an inevitable amount of anachronism in such endeavors, according to Frede, insofar as the commentators will have to reformulate the old views in contemporary terms to a certain extent and to look at them in connection with the questions that are currently debated in the field. But Frede deems this kind of anachronism acceptable as long as sufficient care is taken to correctly identify the views of the past we are interested in and to report them in the best available way. He strongly insists, however, that there are inherent risks of distortion in this approach. This might not be a problem if we are prepared to deal, as philosophers, with views that were not exactly those of the past; but we then run the risk of leaving out something of great philosophical interest, even to us, since "as a rule the philosopher subjected to doxographical treatment was a much better philosopher than the doxographer" (34). If we turn to the past for philosophical inspiration, we should also do it seriously, and this presupposes a historical study of past authors that is pursued for its own sake. [End Page 317]The latter is what Frede is really interested in, and he wants this historical approach to be "as independent as possible from philosophy and not just an ancilla to philosophy" (60). Its practitioners must have a strong philosophical training, of course, in order to understand the views they study and the arguments that were adduced in support of them, but Frede insists that they nevertheless are historians first and foremost: they strive to provide a correct account of "the actual, historical evolution of these views and positions" (14) and of how new doctrines actually grew out of previous ones given the historical context. Insofar as this is what they are doing, historians of... (shrink)

Claude Romano seeks to change all that, to describe precisely what sort of phenomenon an event is and to establish how it can be grasped via a phenomenology.

Certain poets tell stories, other only appreciate the palpable aspects of signs . The latter frequently use puns, thus stressing formal analogies between words .This tends to make us accept that formal analogy results in sense analogy. The logical structure of this reasoning is explained and shown erroneous, for contrarily to science metaphors and puns in poetry are equations or models which do not operate.But these proceedings are in use and it is inadequate to claim that they are but deceits (...) or illusions. In fact poetry is strictly imaginary, its universe is one of pure representation and it recuses any checking by reality or experience‐which is of basic importance in any scientific proceeding. In the last end, this characteristic appears as the only real difference between poets and scientists, both of whom work by application of analogic models. (shrink)

ArgumentAfter having measured the velocity of the nervous impulse in the 1850s, Helmholtz began doing research on the temporal dimensions of visual perception. Experiments dealing with the velocity of propagation in nerves were carried out occasionally for some fifteen years until their final publication in 1871. Although the temporal dimension of perception seems to have interested Helmholtz less than problems of geometry and space, his experiments on the time of perception were technically rather subtle and seminal, especially compared with experiments (...) performed by his contemporaries, such as Sigmund Exner, William James, Rudolf Hermann Lotze, Ernst Mach, Wilhelm Volkmann, and Wilhelm Wundt. Helmholtz’s conception of the temporal aspects of perception reflects the continuity that holds between psychophysiological research and the Kantian philosophical background. (shrink)

In the latest years of the 6th/12th century, two chains of affiliation of a distinctive kind make their appearance in the Muslim world, in the East on one hand, and in the West on the other: the first is referred to in the sources as silsilat al-muṣāfaḥa, the second as silsilat al-mushābaka. These ‘chains’, mentioned mostly in works pertaining to the genre of prosopographic literature in the largest sense, experienced a broad and rapid expansion throughout the dār al-islām. They are (...) linked to a specific ritual aimed at perpetuating, across generations, a physical contact with the Prophet. Widespread among the ʿulamāʾ, they become conflated with the musalsalāt ḥadīths, or ‘chained traditions’, during the Ottoman era. (shrink)

Novel forms of matter, such as states made of gluons (glueballs), multiquark mesons or baryons and hybrid mesons are predicted by low energy QCD, for which several candidates have recently been identified. Searching for such exotic states of matter and studying their production and decay properties in detail has become a flourishing field at the experimental facilities now available or being built - e.g. BESIII in Beijing, BELLE II at SuperKEKB, GlueX at Jefferson Lab, PANDA at FAIR, J-PARC and in (...) the upgraded LHC experiments, in particular LHCb. A modern primer in the field is required so as to both revive and update the teaching of a new generation of researchers in the field of QCD. These lectures on hadron spectroscopy are intended for Master and PhD students and have been originally developed for a course delivered at the Stefan Meyer Institute of the Austrian Academy of Sciences. They are phenomenologically oriented and intended as complementary material for basic courses in particle and nuclear physics. The book describes the spectra of light and heavy mesons and baryons, and introduces the fundamental properties based on symmetries. Further, it derives multiplet structures, mixing angle, decay coupling constants, magnetic moments of baryons, and predictions for multiquark states and compares these with suitable experimental data. Basic methods of calculating decay angular distributions and determining masses and widths of resonances are also presented. The appendices provide students and newcomers to the field with the necessary background information, and include a set of problems and solutions. (shrink)

Cet ouvrage présente les fondements philosophiques et scientifiques du développement actuel des biotechnologies. Ce développement se fonde, philosophiquement, sur l'idée de la réalisation du possible largement commentée dans la tradition philosophique. Il est montré en outre comment le bricolage biotechnologique résulte de propriétés nouvellement reconnues de l'évolution biologique elle-même, qui procède selon le principe du bricolage moléculaire exposé par François Jacob. L'intimité des relations entre biotechnologie et évolution biologique, qui reste mal comprise en général, est ici détaillée à un niveau (...) fondamental, celui de la biologique moléculaire des trente dernières années et des techniques comme l'ADN recombinant et plus récemment l'évolution dirigée et les diverses formes de clonage. Les questions d'éthique et de politique scientifique liées aux biotechnologies sont également examinées. Les réflexions sur le thème biologie et société et la responsabilité scientifique exprimées depuis une trentaine d'années sont présentées en même temps que les divers cadres et actions politiques et institutionnels des biotechnologies. L'ouvrage, qui insiste sur l'extraordinaire malléabilité des structures biologiques, est aussi bien un plaidoyer pour l'exploration maîtrisée des possibles qu'un argumentaire pour une anthropologie philosophique de l'action humaine. (shrink)

Petit manuel d'épistémologie des sciences du social Ce bref ouvrage est composé de deux parties. La première constitue une introduction à l'épistémologie des sciences en général, articulée autour de notions telles que " vérité ", " problème ", " champ ", " paradigme ", etc. Les auteurs de référence y sont Gaston Bachelard, Pierre Bourdieu, Karl Popper, Michel Meyer. Il s'agit en gros de montrer comment l'activité scientifique secrète ses propres modes d'énonciation de vérités, contribuant ainsi à récuser tout projet (...) de relativisme radical. La seconde partie consiste en une application de ces préceptes aux sciences du social, notamment à la sociologie. Y sont examinées les oppositions paradigmatiques classiques, ainsi que celles de l'explication à la compréhension, de la démarche qualitative à la démarche quantitative, etc. Le souci didactique domine dans l'écriture et dans la réduction des références à l'indispensable. (shrink)

Tout au long des années trente, un groupe de jeunes intellectuels non conformistes réunis dans le mouvement " Ordre Nouveau " ont lancé dans le débat une pensée radicalement nouvelle en rupture avec les idées dominantes du collectivisme conquérant et du capitalisme traditionnel. Ils avaient nom Denis de Rougemont, Robert Aron, Arnaud Dandieu, Daniel-Rops, Emmanuel Mounier. Alexandre Marc, philosophe jeté hors de sa Russie natale par la victoire des bolcheviques, était leur fédérateur et animateur principal.0De ces idées, il fit une (...) doctrine, le fédéralisme personnaliste, à l'approfondissement et à la diffusion de laquelle il consacra toute sa vie. On pourrait la croire aujourd'hui oubliée. Et pourtant, c'est en elle qu'ont germé des réalisations et des propositions, révolutionnaires en ces temps et très présentes dans les débats actuels : fédéralisme européen, crise de civilisation, allocation universelle, subsidiarité et régionalisme, etc.0Il en est jusqu'à la pensée dialectique du " en même temps ", chère au macronisme, qui apparaît comme une transposition hasardeuse de la dialectique inclusive, théorisée par Alexandre Marc. Sa disparition, voilà vingt ans, appelle une évaluation de cette doctrine et une tentative d'appréciation critique de sa pertinence. Ce livre s'efforce d'illustrer cette ambition au travers des réflexions des auteurs sur certains de ses aspects névralgiques comme le personnalisme, la crise, la dialectique ou l'action politique.0Certains ont été des élèves et des proches collaborateurs d'Alexandre Marc ; d'autres ne l'ont connu qu'au travers de ses écrits ou de ses conférences. Tous se reconnaissent dans le personnalisme, fondement de cette doctrine méconnue et pourtant, étonnamment actuelle. (shrink)