نتایج جستجو برای: four

تعداد نتایج: 626059  

2008
Yang Li Sun Guohui Martin J. Eppler

Although numerous studies acknowledge that strategies frequently fail not because of inadequate strategy formulation, but because of insufficient implementation, strategy implementation has received less research attention than strategy formulation. In this study, we review the factors that enable or impede effective strategy implementation, and survey the state-of-the-art in this domain. We hi...

Journal: :Journal of child language 2000
M J Doherty

The aim of this study was to explain why children have difficulty with homonymy. Two experiments were conducted with forty-eight children (Experiment 1) and twenty-four children (Experiment 2). Three- and four-year-old children had to either select or judge another person's selection of a different object with the same name, avoiding identical objects and misnomers. Older children were successf...

2014
Carl Georg Heise Konstantinos Panagiotou Oleg Pikhurko Anusch Taraz

This paper extends the scenario of the Four Color Theorem in the following way. Let [Formula: see text] be the set of all [Formula: see text]-uniform hypergraphs that can be (linearly) embedded into [Formula: see text]. We investigate lower and upper bounds on the maximum (weak) chromatic number of hypergraphs in [Formula: see text]. For example, we can prove that for [Formula: see text] there ...

1999
Chris J. Conroy John R. Demboski

Aim A large number of studies have analysed the distribution of mammals within archipelagos, yet few have focused on islands that were heavily glaciated and subsequently colonized following deglaciation. Location We explored the relative effects of island area and isolation on faunal composition based on twenty-three mammalian taxa of twenty-four islands of the Alexander Archipelago, Southeast ...

2013
Robert G. Morrison

Natural theology is reading the book of nature, not the book of revelation, for knowledge of God. Natural theology, as a category employed by practitioners, originated within the history of Christianity, as passages from the New Testament such as Romans 1:20 raised the possibility of knowledge about God without revelation. The best-known work of natural theology is William Paley’s (d. 1805 AD) ...

2017
Yan Lin Shengsheng Wang Xiaohui Zhang Changjun Wang Guangliang Shan Yidong Zhou Feng Mao Jinghong Guan Xin Huang Ying Zhong Qiang Sun

The current case-control study investigated the relationship between striking life events and breast cancer in Chinese women. A total of 265 primary breast cancer patients and 265 controls were enrolled with matching for age and completed questionnaires. Logistic regression analysis was used. Thirty-nine breast cancer patients reported striking life events and twenty-four of the controls report...

Journal: :Sci. Comput. Program. 2011
Carroline Dewi Puspa Kencana Ramli Hanne Riis Nielson Flemming Nielson

We study the international standard XACML 3.0 for describing security access control policy in a compositional way. Our main contribution is to derive a logic that precisely captures the idea behind the standard and to formally define the semantics of the policy combining algorithms of XACML. To guard against modelling artifacts we provide an alternative way of characterizing the policy combini...

2006
MICHAEL WALKER

Let $1 be a finite affine translation plane. If 21 contains a subplane, collineation group pair (2I0, A) such that: * A leaves each point of 2t0 fixed and acts transitively on the points of / \ { / n 2I0}, for / a line of 21 with / n 2l0 a line of 2l0, then 21 is said to be tangentially transitive with respect to 2l0. Jha in his thesis [3] has proved that if 21 is tangentially transitive with r...

2009
John P. Steinberger

We give a new proof of the four-color theorem by exhibiting an unavoidable set of 2822 D-reducible configurations. The existence of such a set had been conjectured by several researchers including Stromquist [18], Appel and Haken [2] and Robertson, Sanders, Seymour and Thomas [15].

2004
Carlo Morosi Livio Pizzocchero

According to a theorem of Treves [11], the conserved functionals of the AKNS equation vanish on all pairs of formal Laurent series (q̃, r̃) of a specified form, both of them with a pole of the first order. We propose a new and very simple proof for this statement, based on the theory of Bäcklund transformations; using the same method, we prove that the AKNS conserved functionals vanish on other p...

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