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virtual-oscillators

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Journal Articles
Historical Studies in the Natural Sciences. 2018; 48156–109 doi: https://doi.org/10.1525/hsns.2018.48.1.56
Published: 01 February 2018
... order and regularity which would be virtually unaffected by the caprice that seemed to prevail in the actions of individuals9 One important feature of the gradual establishment of what Porter calls trust in numbers was a strong initial influence from the social sciences. Statistics was, in its...
Journal Articles
Historical Studies in the Natural Sciences. 2016; 463313–359 doi: https://doi.org/10.1525/hsns.2016.46.3.313
Published: 01 June 2016
... across these discontinuities. © 2016 by the Regents of the University of California 2016 optics optical dispersion ether electromagnetism quantum physics Bohr’s atomic model Ladenburg continuity and discontinuity of knowledge resonance model virtual oscillators MARTA JORDI TALTAVULL...
Journal Articles
Historical Studies in the Natural Sciences. 2016; 465633–668 doi: https://doi.org/10.1525/hsns.2016.46.5.633
Published: 01 November 2016
... and electrical networks. This Gorky group envisioned a science of nonlinear oscillations that would embrace many seemingly disparate areas of physics. They became tightly connected with theorists of control and analog computing at the Insti- tute of Automation and Remote Control.34 As these...
Journal Articles
Historical Studies in the Natural Sciences. 2015; 455758–804 doi: https://doi.org/10.1525/hsns.2015.45.5.758
Published: 01 November 2015
... scientists, rolled into one. In that privileged space, the field of nonlinear optics came together. Consider a stock interpretation of how the U.S. government paid for nonlinear optics. The field was supported by military funding agencies; it was a creature of the laser, a technology that virtually owed...
Journal Articles
Historical Studies in the Natural Sciences. 2013; 434453–491 doi: https://doi.org/10.1525/hsns.2013.43.4.453
Published: 01 September 2013
... major revision of some fundamental concepts in quantum mechanics thus justifying the Brannen-Ferguson (BF) experiment. The BF experiment was virtually identical to the HBT experiment, aside from the detection process. Even before publishing their article, Brannen and Ferguson shared their results with...
Journal Articles
Historical Studies in the Natural Sciences. 2013; 433281–333 doi: https://doi.org/10.1525/hsns.2013.43.3.281
Published: 01 June 2013
... virtually simultaneous and appar- ently independent innovations of Einstein and Picasso were and are often described with similar vocabulary about abstraction with regard to space and time. In line with Langer, Wind, Frye, Huxley, and Waddington, the art critic 42. Epistemic trauma is a construct in this...
Journal Articles
Historical Studies in the Natural Sciences. 2012; 423190–234 doi: https://doi.org/10.1525/hsns.2012.42.3.190
Published: 01 June 2012
... the critical frequency of ordinary wave component [of ] F2-region; minimum virtual height of F-layer; critical frequency [of ] F1-region; minimum virtual height of F1-region; critical frequency of normal E-layer; lowest frequency at which reflections are recorded and their median values. The tables...
Journal Articles
Historical Studies in the Natural Sciences. 2010; 404499–531 doi: https://doi.org/10.1525/hsns.2010.40.4.499
Published: 01 November 2010
... hitherto thought that rice fertilization depended on self-pollination inside a closed flower (cleistog- amy or automatic self-pollination), which would have made manipulation virtually impossible using the techniques of the time, due to the difficulty of accessing the interior of the flower. This, together...
Journal Articles
Historical Studies in the Natural Sciences. 2009; 394444–481 doi: https://doi.org/10.1525/hsns.2009.39.4.444
Published: 01 November 2009
... some cases it A R O N S E L E C T R I C I T Y M E T E R S | 4 5 9 29. The number of the pendulum s oscillations n at a time t under gravitational force alone is where M is the moment of inertia, P the weight and L the distance between the axis and center of mass. When a magnetic force is applied to...
Journal Articles
Historical Studies in the Natural Sciences. 2009; 3911–31 doi: https://doi.org/10.1525/hsns.2009.39.1.1
Published: 01 February 2009
... 1960s to the remarkably rich and flourishing tradition of work in the Soviet Union on stability in nonlinear dynamical systems a tradition beginning with the Russian mathematician A. M. Lyapunov (1857 1918) in the late nineteenth and early twentieth centuries, but one which had been virtually unknown in...
Journal Articles
Historical Studies in the Natural Sciences. 2008; 384535–568 doi: https://doi.org/10.1525/hsns.2008.38.4.535
Published: 01 November 2008
... likewise unconnected with ordinary nuclear physics, another group of high-energy theorists was developing ideas that pointed in similar experimental directions. At the same time as Lee and Wick, a group of MIT theorists were working on the vacuum in QCD, with its virtual quarks and gluons and associated...
Journal Articles
Historical Studies in the Natural Sciences. 2008; 383405–450 doi: https://doi.org/10.1525/hsns.2008.38.3.405
Published: 01 August 2008
... and therefore to electronic function. The symbol for the vacuum tube, for instance, stylized the elements of the device cathode, anode, grid, envelope and then analogized them to a valve, restricting or permitting the flow of electricity through portions of the circuit. Virtually every icon used in...
Journal Articles
Historical Studies in the Natural Sciences. 2003; 341115–149 doi: https://doi.org/10.1525/hsps.2003.34.1.115
Published: 01 September 2003
... with intellectual property law and patents often have trouble deciding who actually invented something. Since every invention builds on prior art, that is, the knowl- edge shared among practitioners skilled in the particular art, some confusion is to be expected. In principle, unlike virtually any...
Journal Articles
Journal Articles
Historical Studies in the Natural Sciences. 2002; 331161–192 doi: https://doi.org/10.1525/hsps.2002.33.1.161
Published: 01 September 2002
... coordinating their movements over long distances and producing the phenomenon of plasma oscillations, which had been known since the 1920s but not properly understood. And finally, these oscillations, collective self-organized actions of electrons, could carry some of the electrons away, defying the forces of...
Journal Articles
Historical Studies in the Natural Sciences. 2001; 312285–353 doi: https://doi.org/10.1525/hsps.2001.31.2.285
Published: 01 March 2001
... he could derive the conditions of equilibrium of any system of bodies, from the law of the lever to Jean Bernoulli s principle of virtual velocities.33 32. Ibid., 58. The definition of mass is only implicit in d Alembert s text. 33. Ibid., 60-70. The expression, principle of virtual velocities, and...
Journal Articles
Historical Studies in the Natural Sciences. 2000; 302373–392 doi: https://doi.org/10.2307/27757836
Published: 01 January 2000
... potential growth area. Three-quarters of the globe was virtually unknown from a scientific standpoint, and fundamental theoretical questions in the earth sciences hinged on the structure and composition of the ocean floor. Although the impor tance of these questions was widely recognized, before the 1920s...
Journal Articles
Historical Studies in the Natural Sciences. 1999; 292295–331 doi: https://doi.org/10.2307/27757812
Published: 01 January 1999
... socialist-minded physicists to develop meth ods for the description of the collective behavior of particles, which led them to several new physical models, later united under the general term quasiparticles. As basic objects in virtually all fields of current research on the properties of matter, including...
Journal Articles
Historical Studies in the Natural Sciences. 1999; 301279–306 doi: https://doi.org/10.2307/27757827
Published: 01 January 1999
... government," and Eisenhower's "Farewell address" in 1961 weighed heavily upon virtually every discussion about scientists, politics, and society in the years immediately following.15 Although the "Two cultures" lecture represented an unabashed faith in the power of science, Snow's Godkin Lectures and...
Journal Articles
Historical Studies in the Natural Sciences. 1999; 30149–87 doi: https://doi.org/10.2307/27757820
Published: 01 January 1999
.... Superimposed on this long-term growth in sci entific capacity, however, was a succession of disruptive political oscillations. Cold War tensions, conflicts over China's development priorities, and power struggles within the Party leadership led to drastic policy changes and political purges. In the Mao era...