منابع مشابه
EURONEAR - Data Mining of Asteroids and Near Earth Asteroids
Besides new observations, mining old photographic plates and CCD image archives represents an opportunity to recover and secure newly discovered asteroids, also to improve the orbits of Near Earth Asteroids (NEAs), Potentially Hazardous Asteroids (PHAs) and Virtual Impactors (VIs). These are the main research aims of the EURONEAR network. As stated by the IAU, the vast collection of image archi...
متن کاملMultifractal Discrimination Model of High-Frequency Pupil-diameter Measurements
Multifractality present in high frequency pupil diameter measurements, usually connected with irregular scaling behavior and self-similarity, is modelled with statistical accuracy. A multifractal spectrum is used to discriminate pupil behavior measurements from four groups differing in ocular pathology. Broadness and the spectrum maximum, two measures characterizing the multifractal spectrum of...
متن کاملMeasurements of Pupillary Diameter and Wavefront Aberrations in Pregnant Women
Purpose. To show whether pregnancy affects the measurements of pupillary diameter and wavefront (WF) aberrations. Methods. This was a case-control study including 34 healthy pregnant women in the third trimester and age-matched 34 nonpregnant women. Only women who had no ocular abnormalities and no refractive error were included. We measured photopic and mesopic pupil diameter and WF aberration...
متن کاملDepth to Diameter Measurements of Mercurian Mature Complex Craters
Introduction: Previous crater studies of Mercury utilized shadow measurement techniques to determine some crater characteristics [1-5]. Shadow measurements of crater topography yield accurate relative heights, but are limited to craters that have shadows that reach the crater center. Pike [5] collected morphologic characteristics of 316 impact craters on Mercury. Craters were classified into se...
متن کاملMineralogy of Asteroids
The past decade has seen a significant expansion both in the interpretive methodologies used to extract mineralogical information from asteroid spectra and other remote-sensing data and in the number of asteroids for which mineralogical characterizations exist. Robust mineralogical characterizations now exist for more than 40 asteroids, an order a magnitude increase since Asteroids II was publi...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1971
ISSN: 0252-9211
DOI: 10.1017/s0252921100088862