scholarly journals The Geometry of Vision: Hermann Maertens’ Optical Scale for a Deterministic Architecture | La Geometría de la Visión: la Escala Óptica de Hermann Maertens para una Arquitectura Determinista

ZARCH ◽  
2017 ◽  
pp. 60
Author(s):  
Fabio Colonnese
Keyword(s):  
1960 ◽  
Vol 3 (6) ◽  
pp. 483-484
Author(s):  
V. I. Melamed ◽  
V. I. Davidyuk
Keyword(s):  

2016 ◽  
Vol 11 (S321) ◽  
pp. 283-283
Author(s):  
Thomas Martinsson ◽  
Marc Verheijen ◽  
Matthew Bershady ◽  
Kyle Westfall ◽  
David Andersen ◽  
...  

AbstractWe present results on luminous and dark matter mass distributions in disk galaxies from the DiskMass Survey. As expected for normal disk galaxies, stars dominate the baryonic mass budget in the inner region of the disk; however, at about four optical scale lengths (hR) the atomic gas starts to become the dominant contributor. Unexpectedly, we find the total baryon to dark-matter fraction within a galaxy stays nearly constant with radius from 1hR out to at least 6hR, with a baryon fraction of 15–50% among galaxies. On average, only one third of the mass within 2.2hR in a disk galaxy is baryonic and these baryons appear to have had only a minor effect on the distribution of the dark matter.


Applied laser ◽  
2014 ◽  
Vol 34 (4) ◽  
pp. 350-354
Author(s):  
蒋文亭 Jiang Wenting ◽  
苗强 Miao qiang ◽  
吴德伟 Wu Dewei

Author(s):  
Jacopo Parravicini ◽  
Aharon J. Agranat ◽  
Claudio Conti ◽  
Eugenio DelRe
Keyword(s):  

2013 ◽  
Vol 479-480 ◽  
pp. 692-696
Author(s):  
Shann Chyi Mou

In this paper, a novel disk piezoelectric actuator structure - 4-9-9-14 piezoelectric actuator is constructed, and it is made of piezoelectric buzzer to drive a biaxial piezoelectric actuated stage. The 4-9-9-14 piezoelectric actuator offers a better balanced capability of forward rotation and reverse rotation than the conventional edge-driving piezoelectric actuator. The biaxial piezoelectric actuated stage structure comprises a base, a V-shaped guide rail, an optical scale measurement system, a preload adjusting structure, and a load-carrying stage. The movement of a stage is read and analyzed by means of LabVIEW operating in conjunction with an optical scale. Stage movement-related signals read by the optical scale are processed. With a human-machine interface of LabVIEW, the movement of the stage is depicted by a waveform chart to thereby facilitate the observation of the waveform chart and the understanding of propulsion of the stage by the actuator.


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