منابع مشابه
1 3 N ov 2 00 7 Five or six step scenario for evolution ?
The prediction that (due to the limited amount of hydrogen available as fuel in the Sun) the future duration of our favourable terrestrial environment will be short (compared with the present age of the Earth) has been interpreted as evidence for a hard step scenario. This means that some of the essential steps (such as the development of eukaryotes) in the evolution process leading to the ulti...
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For integers p, q, s with p ≥ q ≥ 2 and s ≥ 0, let K−s 2 (p, q) denote the set of 2−connected bipartite graphs which can be obtained from Kp,q by deleting a set of s edges. F.M.Dong et al. (Discrete Math. vol.224 (2000) 107–124) proved that for any graph G ∈ K−s 2 (p, q) with p ≥ q ≥ 3 and 0 ≤ s ≤ min{4, q−1}, then G is chromatically unique. In this paper, we shall extend this result to p ≥ q ≥...
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Scenarios of human-computer interaction help us to understand and to create computer systems and applications as artifacts of human activity Ñas things to learn from, as tools to use in one's work, as media for interacting with other people. Scenario-based design of information technology addresses five technical challenges: Scenarios evoke reflection in the content of design work, helping deve...
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The aim of this study is to determine preschool children’s attitudes towards augmented reality picture books (ARPB), their story comprehension performance (SCP) and the relationships between these variables. The sample consisted of 92 fiveand six-year-olds (49 boys, 43 girls). An attitude form, story comprehension test and interview form were used as data collection tools. Most of the children ...
متن کاملMulti-Step Scenario Matching Based on Unification
This paper presents an approach to multi-step scenario specification and matching, which aims to address some of the issues and problems inherent in to scenario specification and event correlation found in most previous work. Our approach builds upon the unification algorithm which we have adapted to provide a seamless, integrated mechanism and framework to handle event matching, filtering, and...
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ژورنال
عنوان ژورنال: International Journal of Astrobiology
سال: 2008
ISSN: 1473-5504,1475-3006
DOI: 10.1017/s1473550408004023