نتایج جستجو برای: astronomical units

تعداد نتایج: 179278  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم انسانی 1389

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...

Journal: :Science 1895

Journal: :Brain research 2009
Adam Zawiszewski Angela D Friederici

In this study we investigated the generality of the electrophysiological mechanisms underlying verb agreement relations by looking not only at subject-verb (SV) but, moreover, at object-verb (OV) agreement phenomena in Basque-a language in which both the subject and the object have to agree with the verb. We first provide event-related potentials (ERP) evidence for processing differences in SV ...

Journal: :CoRR 2014
Mark Taylor

Abstract. TOPCAT is a widely used desktop application for manipulation of astronomical catalogues and other tables, which has long provided fast interactive visualisation features including 1, 2 and 3-d plots, multiple datasets, linked views, color coding, transparency and more. In Version 4 a new plotting library has been written from scratch to deliver new and enhanced visualisation capabilit...

2013
Huaichun Wu Shihong Zhang Linda A. Hinnov Ganqing Jiang Qinglai Feng Haiyan Li Tianshui Yang

An important innovation in the geosciences is the astronomical time scale. The astronomical time scale is based on the Milankovitch-forced stratigraphy that has been calibrated to astronomical models of paleoclimate forcing; it is defined for much of Cenozoic-Mesozoic. For the Palaeozoic era, however, astronomical forcing has not been widely explored because of lack of high-precision geochronol...

2006
Stella Vosniadou

In this paper we report an experiment that investigated the question of whether elementary school children have metaconceptual awareness of theory revision processes. Fiftytwo elementary school children (grades, 1, 3 and 5) were asked to select between phenomenological and scientific depictions of different astronomical phenomena and indicate which of these depictions were closer to “Reality” a...

2013
John Herschel

The Moon is the closest astronomical object to the Earth, and the only one on which we can see significant surface features with our naked eyes (the Sun is too bright, and everything else is pointlike or, like the Andromeda galaxy, too dim). As a result, it has from time immemorial inspired many fanciful notions, including that the Moon is inhabited. In fact, life on the Moon was the subject of...

2014
S. C. Chapman A. Tikhomirov C. M. Bradford S. Hailey-Dunsheath

A two arm, opto-mechanical positioner mechanism is presented in this proceedings as a candidate steering system for the millimeter-wave XSPEC spectrograph. The design is well matched to the expected target density on the sky, and meeting all requirements of the Cerro Chajnantor Atacama Telescope (CCAT), site environmental conditions (e.g., operating temperature and power dissipation), and the p...

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