By Stephen Jay Gould
ISBN-10: 0674063406
ISBN-13: 9780674063402
In his ultimate e-book and his first full-length unique name in view that complete residence in 1996, the eminent paleontologist Stephen Jay Gould bargains a shocking and nuanced research of the complicated dating among our nice methods of realizing: technology and the arts, dual nation-states of data which have been divided opposed to one another for much too lengthy.
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Extra resources for The Hedgehog, the Fox, and the Magister's Pox: Mending the Gap between Science and the Humanities
Sample text
A single high order deformable mirror conjugated to the ground is used to correct the ground layer turbulence. The concept is summarized in Fig 1. 2” FWHM) a high order correction is required: the ground layer must be almost fully corrected. This was verified by simulations. We end up with 32×32 sub-apertures on the wavefront sensor, 881 actuators on the deformable mirror. Four sodium laser guide stars are used to provide sufficient flux to the wavefront sensors. Since only one DM is used, the only modes which need to be measured from a single NGS are tip and tilt.
Finally, they are monochromatic, allowing the use of a filter to block their light from entering the spectrograph. This light would otherwise certainly saturate the detector. The estimated performance of the wide field, low resolution mode performance can be seen in Fig. 2. Notice the small amplitude of isoplanatic effect 38 M. Le Louarn et al. Fig. 1. Muse concept showing the location of the laser guide stars, the natural guide star and the science field of view. Fig. 2. Performance in the low resolution mode (shown as encircled energy as a function of distance from PSF center).
3. Strehl loss due to angular anisoplanatism, expressed at H band, as a function of the distance to the guide star. 5)2 ) The results presented above are for guide stars bright enough that the photon noise and the electronic noise on the WFS CCD are negligible. When this is the case, we say that the system works in full correction mode and the performance are pretty much independent of the actual GS brightness. Below a certain brightness however, the WFS noise becomes significant and the performance degrades with decreasing GS brightness, until the GS is too faint to serve as reference.
The Hedgehog, the Fox, and the Magister's Pox: Mending the Gap between Science and the Humanities by Stephen Jay Gould
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