منابع مشابه
Commission 10: Solar Activity
Commission 10 aims at the study of various forms of solar activity, including networks, plages, pores, spots, fibrils, surges, jets, filaments/prominences, coronal loops, flares, coronal mass ejections (CMEs), solar cycle, microflares, nanoflares, coronal heating etc., which are all manifestation of the interplay of magnetic fields and solar plasma. Increasingly important is the study of solar ...
متن کاملThe Solar parallax with the transit of Venus
In this note I show how one can derive the timing of the four contacts of Venus with the sun disk as a function of the location of the observer and of the solar parallax with a relatively simple approximate formula whose accuracy is sufficient to process the observations of a network of observers. Two models are discussed : one, linear in the coordinates of the observer, has an accuracy of 5 to...
متن کاملPrimitive Parallax and Parallax Primitives
This paper describes an implementation of parallax depth perception designed to be a contributing unit to a distributed perceptual intelligence. The work was done in the context of the Cog project, a large-scale eeort to develop human or at least infant intelligence from the bottom up. Our implementation uses fast-approximation \good enough" region mapping and relevant motion detection over mul...
متن کاملWorking Paper 34 UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE CONFERENCE OF EUROPEAN STATISTICIANS
1. Missing data problems are ubiquitous in many fields, including official statistics, where one of the common treatments of missing data is ratio imputation (de Waal et al., 2011; Thompson & Washington, 2012; Office for National Statistics, 2014). On the other hand, multiple imputation has been the recommended practice from statisticians (Rubin, 1987; Little & Rubin, 2002). Among statisticians...
متن کاملExoplanet Transit Parallax
The timing and duration of exoplanet transits has a dependency on observer position due to parallax. In the case of an Earth-bound observer with a 2 AU baseline the dependency is typically small and slightly beyond the limits of current timing precision capabilities. However, it can become an important systematic effect in high-precision repeated transit measurements for long period systems due...
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ژورنال
عنوان ژورنال: Transactions of the International Astronomical Union
سال: 1936
ISSN: 0251-107X
DOI: 10.1017/s0251107x00017703