Cele mai multe experimente au confirmat relativitatea generală cu ajutorul tehnologiilor nou dezvoltate. S-a creat o bază tehnologică pentru astronomia undelor gravitaționale. S-au construit antene barogene criogenice și antene interferometrice laser performante, asociate cu analiza teoretică a experimentelor cu masele de testare, rezultând că sensibilitatea experimentelor depinde de izolarea termică, dacă dispozitivul înregistrează continuu coordonatele sensibilitatea antenei este limitată, și se poate crește sensibilitatea dacă se folosesc proceduri cuantice. Antenele pot ajuta în observarea radiației gravitaționale de fond și testarea relativității (...) generale în cazul ultra-nelinar. DOI: 10.13140/RG.2.2.34549.63200. (shrink)

ABSTRACT ABSTRACT: I show that Aristotelian physics is a correct and nonintuitive approximation of Newtonian physics in the suitable domain in the same technical sense in which Newton’s theory is an approximation of Einstein’s theory. Aristotelian physics lasted long not because it became dogma, but because it is a very good, empirically grounded theory. This observation suggests some general considerations on intertheoretical relationships.

The ArgumentWe present a number of findings concerning Galileo's major discoveries which question both the methods and the results of dating his achievements by common historiographic criteria. The dating of Galileo's discoveries is, however, not our primary concern. This paper is intended to contribute to a critical reexamination of the notion of discovery from the point of view of historical epistemology. We claim that the puzzling course of Galileo's discoveries is not an exceptional comedy of errors but rather illustrates the (...) normal way in which scientific progress is achieved. We argue that scientific knowledge generally develops not as a sequence of independent discoveries accumulating to a new body of knowledge but rather as a network of interdependent activities which only as a whole makes the individual steps understandable as meaningful “discoveries.”. (shrink)

Peter Anstey has suggested that in our analyses of early modern natural philosophy we should abandon a frequently used distinction: that between rationalism and empiricism. He argues that we should replace it with another distinction, that between experimental and speculative natural philosophy. The second distinction, he argues, was not only widely used at the time, but has a greater explanatory range. It follows, he suggests, that it is a better way of “carving up” the writings of that period.It is clear (...) that a distinction between experimental and speculative natural philosophy did become common in the late seventeenth-century. But I am less convinced that it is a useful one. This.. (shrink)

This inaugural handbook documents the distinctive research field that utilizes history and philosophy in investigation of theoretical, curricular and pedagogical issues in the teaching of science and mathematics. It is contributed to by 130 researchers from 30 countries; it provides a logically structured, fully referenced guide to the ways in which science and mathematics education is, informed by the history and philosophy of these disciplines, as well as by the philosophy of education more generally. The first handbook to cover the (...) field, it lays down a much-needed marker of progress to date and provides a platform for informed and coherent future analysis and research of the subject. -/- The publication comes at a time of heightened worldwide concern over the standard of science and mathematics education, attended by fierce debate over how best to reform curricula and enliven student engagement in the subjects There is a growing recognition among educators and policy makers that the learning of science must dovetail with learning about science; this handbook is uniquely positioned as a locus for the discussion. -/- The handbook features sections on pedagogical, theoretical, national, and biographical research, setting the literature of each tradition in its historical context. Each chapter engages in an assessment of the strengths and weakness of the research addressed, and suggests potentially fruitful avenues of future research. A key element of the handbook’s broader analytical framework is its identification and examination of unnoticed philosophical assumptions in science and mathematics research. It reminds readers at a crucial juncture that there has been a long and rich tradition of historical and philosophical engagements with science and mathematics teaching, and that lessons can be learnt from these engagements for the resolution of current theoretical, curricular and pedagogical questions that face teachers and administrators. (shrink)

Thought experiments have been influential in philosophy at least since Plato, and they have contributed to science at least since Galileo. Some of this influence is appropriate, because thought experiments can have legitimate roles in generating and clarifying hypotheses, as well as in identifying problems in competing hypotheses. I will argue, however, that philosophers have often overestimated the significance of thought experiments by supposing that they can provide evidence that supports the acceptance of beliefs. Accepting hypotheses merely on the basis (...) of thinking about them constitutes a kind of epistemic hubris with many negative consequences, including the acquisition of false beliefs and the blocking of .. (shrink)

Science teaching always engages a philosophy of science. This article introduces a modern philosophy of science and indicates its implications for science education. The hermeneutic philosophy of science is the tradition of Kant, Heidegger, and Heelan. Essential to this tradition are two concepts of truth, truth as correspondence and truth as disclosure. It is these concepts that enable access to science in and of itself. Modern science forces aspects of reality to reveal themselves to human beings in events of disclosure. (...) The achievement of each event of disclosure requires the precise manipulation of equipment, which is an activity that depends on truth as correspondence. The implications of the hermeneutic philosophy of science for science education are profound. The article refers to Newton’s early work on optics to explore what the theory implies for teaching. Modern science—as the event of truth—is a relationship between an individual student, equipment, and reality. Science teachers provide for their students’ access to truth and they may show how their discipline holds a special relationship to reality. If the aim of science teaching is to enable students to disclose reality, the science curriculum will challenge some of the current practices of schooling. If teachers base science teaching upon the hermeneutic philosophy of science, science will assert itself as the intellectual discipline that derives from nature, and not from the inclinations of human beings. Science teachers teach nature’s own science. (shrink)

This thesis develops a hermeneutic philosophy of science to provide insights into physics education. -/- Modernity cloaks the authentic character of modern physics whenever discoveries entertain us or we judge theory by its use. Those who justify physics education through an appeal to its utility, or who reject truth as an aspect of physics, relativists and constructivists, misunderstand the nature of physics. Demonstrations, not experiments, reveal the essence of physics as two characteristic engagements with truth. First, truth in its guise (...) as correspondence enables a human being to prepare for the distinctive event of physics. -/- Second, the event of physics occurs in human perception when someone forces a hidden reality to disclose an aspect of itself. Thus, the ground of physics is our human involvement with reality achieved by way of truth. -/- To support this account of physics, the thesis reports phenomenological investigations into Isaac Newton’s involvement with optics and a secondary school physics laboratory. These involve interpretations of Heidegger’s theory of beings, schema and signification. The project draws upon, and contributes to, the hermeneutic phenomenology of modern physics, a tradition in continental philosophy that begins with Immanuel Kant, and advances particularly from Martin Heidegger to Patrick Heelan. -/- The thesis advocates an ontological pedagogy for modern physics which has as its purpose each individual student’s engagement with reality and truth. Students may achieve this through demonstrations of phenomena that will enable them to dwell with physics, an experience that contrasts with their embroilment in modernity, and which perpetuates nature’s own science. (shrink)

in spite of koyré's conclusions, there are sufficient reasons to claim that galileo, and with him the beginnings of classical mechanics in early modern times, was closely related to practical mechanics. it is, however, not completely clear how, and to what extent, practitioners and engineers could have had a part in shaping the modern sciences. by comparing the beginnings of modern dynamics with the beginnings of statics in antiquity, and in particular with archimedes — whose rediscovery in the sixteenth century (...) was of great consequence — i will focus on the question of which devices played a comparable role in dynamics to that of the lever and balance in statics. i will also examine where these devices came from. in this way, i will show that the entire world of mechanics of that time — “high” and “low,” practical and theoretical — was of significance for shaping classical mechanics and that a specific relationship between art and science was and is constitutive for modern sciences. (shrink)

we present a number of findings concerning galileo's major discoveries which question both the methods and the results of dating his achievements by common historiographic criteria. the dating of galileo's discoveries is, however, not our primary concern. this paper is intended to contribute to a critical reexamination of the notion of discovery from the point of view of historical epistemology. we claim that the puzzling course of galileo's discoveries is not an exceptional comedy of errors but rather illustrates the normal (...) way in which scientific progress is achieved. we argue that scientific knowledge generally develops not as a sequence of independent discoveries accumulating to a new body of knowledge but rather as a network of interdependent activities which only as a whole makes the individual steps understandable as meaningful “discoveries.”. (shrink)

This undergraduate textbook introduces some fundamental issues in philosophy of science for students of philosophy and science students. The book is divided into two parts. Part 1 deals with knowledge and values. Chap. 1 presents the classical conception of knowledge as initiated by the ancient Greeks and elaborated during the development of science, introducing the central concepts of truth, belief and justification. Aspects of the quest for objectivity are taken up in the following two chapters. Moral issues are broached in (...) Chap. 4, which discusses some aspects of the use and abuse of science, taking up the responsibilities of scientists in properly conducting their business and decision-makers in their concerns with the import of science for society. Part 2 contrasts the view of scientific progress as the rejecting of old hypotheses and theories and replacing them with new ones, represented by Karl Popper, with the conception of progress as accumulating knowledge, saving as much as possible from older theories, represented by Pierre Duhem. A concluding chapter defends the natural attitude of taking the theories of modern science to be literally true, i.e. realism, in the face of arguments drawn partly from the history of scientific progress in criticism of this stance. (shrink)

In reviewing Finocchiaro's book, I argue that Galileo deserved to be found guilty for the charges against him. A measure of Finocchiaro's scrupulously fair-minded presentation of the issues surrounding the Galileo Affair is the fact that a contrary case against his own exculpatory evaluation may be inferred from his meticulous scholarship. Specifically, to acknowledge that the standards of evaluation and judgment have changed since 1633 is not in any way to diminish Galileo's greatness but, on the contrary, to recognize his (...) visionary insights. Even to acknowledge that he was justly condemned by standards that we no longer accept in science or theology is not to detract from his deserved place in the firmament of scientific genius. (shrink)

Starting from the examination of a passage of the Dialogo sopra i massimi sistemi del mondo that has been largely ignored by the scholarship, in this paper I want to reveal the true nature of Galileo’s epistemology in terms of its epistemic ideal, that is that theory is capable of providing true and certain knowledge about natural phenomena coming from sensation. The investigation examines all the occurrences of the expression sensate esperienze in its singular and plural forms, both in the (...) Latin and in the vernacular. The research proceeds diachronically through an analysis of Galileo’s writings taken in order to show the progressive development of his epistemology. The paper will demonstrate how in thinking about sensate experiences Galileo had in mind as epistemic paradigm that of the epistemology of anatomy. (shrink)

Agassi has undertaken the challenge of performing a microanalysis of the works of several scientists, pointing out areas of complexity, raising questions, and criticizing current histories of science. Among the topics he has tackled are Bacon’s philosophy of science, Boyle’s ideology, the rationale of Galileo’s work, Newton’s declared methodology—influential, but misleading—, Faraday’s emancipatory enterprise; and the roots of the quantum revolution. He attempts to reconstruct what scientists did in the immediate context, rather than what they said they did, and highlights (...) difficulties and points of scepticism. Agassi considers many neglected factors that influenced science, taking in the metaphysical, social, anthropological, and even psychological spheres. (shrink)

: In the concluding pages of his Epistolae duae de motu impresso a motore translato (1642), Pierre Gassendi provides a brief summary of the explanation of the tides found in Galileo's Dialogue over the Two Chief World Systems (1632). A comparison between the two texts reveals, however, that Gassendi surreptitiously modifies Galileo's theory in some crucial points in the vain hope of rendering it more compatible with the observed phenomena. But why did Gassendi not acknowledge his departures from the Galilean (...) model? The present article argues that cautiousness was just one of the reasons that stopped the French priest from turning Galileo's theory into his own theory. He was probably also aware of the fact that Kepler's model of planetary motion, which he endorsed in the Epistolae, could not be reconciled with Galileo's explanation of the tides. In the postumously published Syntagma philosophicum (1658), Gassendi tried to mend this major inconsistency by arguing that Galileo's theory of the tides not only remained valid, but became even more coherent, if one attributed to the Earth an elliptic orbit. But given that in the Syntagma Gassendi officially adhered to the Tychonic system, his effort to reconcile Kepler and Galileo, while already unconvincing by itself, appears completely futile. (shrink)

In Dynamics of Reason (2001), Michael Friedman uses the example of Galilean rectilinear inertia to support his defense of scientific rationality against post-positivist skepticism. However, Friedman’s treatment of the case is flawed, such that his model of scientific change fails to fit the historical evidence. I present the case of Galileo, showing how it supports Friedman’s view of scientific knowledge, but undermines his view of scientific change. I then suggest reciprocal iteration as an amendment of Friedman’s view that better accounts (...) for scientific change. (shrink)

Those with knowledge about scientific instruments come from many different fields. Prominent among them are (1) collectors and dealers, (2) curators, (3) historians, (4) instrument makers, (5) philosophers, and (6) scientists (the order is alphabetical, not value-laden). The annual symposium of the Scientific Instrument Commission often brings members of each of these groups together, and they learn from one another. What follows are brief reflections on the activities of each group when its members consider instruments.

The ArgumentIn spite of Koyré's conclusions, there are sufficient reasons to claim that Galileo, and with him the beginnings of classical mechanics in early modern times, was closely related to practical mechanics. It is, however, not completely clear how, and to what extent, practitioners and engineers could have had a part in shaping the modern sciences. By comparing the beginnings of modern dynamics with the beginnings of statics in Antiquity, and in particular with Archimedes — whose rediscovery in the sixteenth (...) century was of great consequence — I will focus on the question of which devices played a comparable role in dynamics to that of the lever and balance in statics. I will also examine where these devices came from. In this way, I will show that the entire world of mechanics of that time — “high” and “low,” practical and theoretical — was of significance for shaping classical mechanics and that a specific relationship between art and science was and is constitutive for modern sciences. (shrink)

In 1950, Alan Turing proposed his iconic imitation game, calling it a ‘test’, an ‘experiment’, and the ‘the only really satisfactory support’ for his view that machines can think. Following Turing’s rhetoric, the ‘Turing test’ has been widely received as a kind of crucial experiment to determine machine intelligence. In later sources, however, Turing showed a milder attitude towards what he called his ‘imitation tests’. In 1948, Turing referred to the persuasive power of ‘the actual production of machines’ rather than (...) that of a controlled experiment. Observing this, I propose to distinguish the logical structure from the rhetoric of Turing’s argument. I argue that Turing’s proposal of a crucial experiment may have been a concession to meet the standards of his interlocutors more than his own, while his construction of machine intelligence rather reveals a method of successive idealizations and exploratory experiments. I will draw a parallel with Galileo’s construction of idealized fall in a void and the historiographical controversies over the role of experiment in Galilean science. I suggest that Turing, like Galileo, relied on certain kinds of experiment, but also on rhetoric and propaganda to inspire further research that could lead to convincing scientific and technological progress. (shrink)

In the last decade the systems approach to agricultural research has begun to subsume the older reductionist approaches. However, proponents of the systems approach often accept without critical examination a number of features that were inherited from previously accepted approaches. In particular, supporters of the systems approach frequently ignore the ironies and tragedies that are a part of all human endeavors. They may also fail to consider that all actual systems are temporally and spatially bounded. By incorporating such features into (...) a systems perspective, it becomes possible to consider them as involving the manipulation of things, the reconstruction of institutions, and the reformulation of policies in accordance with democratic goals and objectives as part of a single web of interrelationships. (shrink)

i propose a revisionist account of the production and reception of galileo's telescopic observations of 1609–10, an account that focuses on the relationship between credit and disclosure. galileo, i argue, acted as though the corroboration of his observations were easy, not difficult. his primary worry was not that some people might reject his claims, but rather that those able to replicate them could too easily proceed to make further discoveries on their own and deprive him of credit. consequently, he tried (...) to slow down potential replicators to prevent them from becoming competitors. he did so by not providing other practitioners access to high-power telescopes and by withholding information about how to build them. this essay looks at the development of galileo's monopoly on early telescopic astronomy to understand how the relationship between disclosure and credit changed as he moved from being an instrument-maker to becoming a discoverer and, eventually, a court philosopher. (shrink)

The ArgumentI propose a revisionist account of the production and reception of Galileo's telescopic observations of 1609–10, an account that focuses on the relationship between credit and disclosure. Galileo, I argue, acted as though the corroboration of his observations were easy, not difficult. His primary worry was not that some people might reject his claims, but rather that those able to replicate them could too easily proceed to make further discoveries on their own and deprive him of credit. Consequently, he (...) tried to slow down potential replicators to prevent them from becoming competitors. He did so by not providing other practitioners access to high-power telescopes and by withholding information about how to build them. This essay looks at the development of Galileo's monopoly on early telescopic astronomy to understand how the relationship between disclosure and credit changed as he moved from being an instrument-maker to becoming a discoverer and, eventually, a court philosopher. (shrink)

Raspravljamo o ulozi predpojmovnog kompleksnog mišljenja u znanstvenoj spoznaji i razvoju znanosti. Kompleksno mišljenje sa svom heterogenošću i imaginacijom omogućuje održavanje pojmovne strukture i reorganizaciju cjelokupnih teorijskih mreža, ali to “naplaćuje” latentnim prisustvom protuslovlja i nekonzistentnosti.Članak se nastavlja na našu analizu odnosa između kompleksnog i pojmovnog mišljenja u Aristotelovoj Fizici. Ako je kod Aristotela središnji kompleks pojam “mjesta”, kod Galileija je osnovni kompleks zbirka gibanja-stanja. Galilei još nema izrađenu potpunu pojmovnu strukturu mehanike pa možemo reći da je njegova teorijska osnova (...) uronjena u kompleksnu razinu, ali se oslanja na matematičku strukturu i eksperiment i time uspijeva formirati jednu stabilnu teorijsku organizaciju. Time dobiva osnovu za novu teorijsku sistematizaciju i za formiranje pojmovne strukture kakva je Newtonova. Možemo u izvjesnom smislu reći da je time kompleksno mišljenje u znanosti bilo podignuto na višu razinu i dovedeno u pred-paradigmično razdoblje.We discuss the role of the pre-conceptual complex thought in scientificknowledge and in the development of science. The heterogeneity and imagination of complex thought enables the preservation of the conceptual structure and helps reshape entire theoretical nets, however, its downside is reflected in its latent contradiction and inconsistency. This paper is a continuation of our analysis of the relationship between complex and conceptual thought in Aristotle’s Physics. If Aristotle’s central complex is the notion of “place”, then Galileo’s basic complex is the notion of “ movement”. Since Galileo didn’t have an elaborated conceptual structure of mechanics, we can say that his theoretical basis is “steeped” in the level of complex thought, yet it relies on the mathematical structure and experiment, thereby creating a stable theoretical organization which serves as a basis for the new theoretical systematization and for the shaping of a conceptual structure as Newton’s. Thus, we may claim that, in a certain way, this change raised complex thought in science to a higher level, and brought it to a pre-paradigmatic period. (shrink)

The inductive problem of extending the sequence 1, 3, 5, 7, is solved when these numbers are the ratios of the incremental distances fallen in successive unit times. The controlling fact is Galileo’s assumption that these ratios are invariant under a change of the unit of time. It admits few laws and only one is compatible with the two-numbered initial sequence 1, 3.