منابع مشابه
Radiant distribution of micrometeors
Precise knowledge of the angle between the meteor vector velocity and the radar beam axis is one of the largest source of errors in the Arecibo Observatory (AO) microme-teor observations. In this paper we study ∼250 high signal-to-noise ratio (SNR) meteor head-echoes obtained using the dual-beam 430 MHz AO Radar in Puerto Rico, in or-5 der to reveal the distribution of this angle. All of these ...
متن کاملComparison of Shooting Time Characteristics and Shooting Posture Between High- and Low- Performance Archers
Background. Archery is a precision sport that requires high levels of consistency and reproducibility in the shooting movement to achieve the highest score. Objectives. This study aimed to compare and correlate the shooting time characteristics and shooting posture on the archery shooting performance of high- and low-performance archers. Methods. Terengganu state team and Malaysia Pahang Spor...
متن کاملShooting Stars in the Sky: An Online Algorithm for Skyline Queries
Skyline queries ask for a set of interesting points from a potentially large set of data points. If we are traveling, for instance, a restaurant might be interesting if there is no other restaurant which is nearer, cheaper, and has better food. Skyline queries retrieve all such interesting restaurants so that the user can choose the most promising one. In this paper, we present a new online alg...
متن کاملLINEAR PULSATION CHARACTERISTICS OF MIRA VARIABLE STARS
The linear adiabatic pulsation-periods of Mira variable stars have been derived. Approximately 2701[1]models were calculated for M = 0.7 MΘ to 2 MΘ stars with radii from 180 RΘ to 340 RΘ and luminosities from 2800 LΘ to 10,000 LΘ. The chemical composition of all models is (X,Z) = (0.7,0.02). From the result of this study, linear relations on Luminosity-Period-Mass relationship and luminosity-pe...
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ژورنال
عنوان ژورنال: Nature
سال: 1876
ISSN: 0028-0836,1476-4687
DOI: 10.1038/015158a0