let $g=(v, e)$ be a graph. by emph{directional labeling (ord-labeling)} of an edge $x=uv$ of $g$ by an ordered $n$-tuple$(a_1,a_2,...,a_n)$, we mean a labeling of the edge $x$ such thatwe consider the label on $uv$ as $(a_1,a_2,...,a_n)$ in thedirection from $u$ to $v$, and the label on $x$ as$(a_{n},a_{n-1},...,a_1)$ in the direction from $v$ to $u$. inthis paper, we study graphs, called emph{...

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High-Efficient traffic system is very important for economy and society of c ities. Previous studies on the traffic comparison mostly took a city as a whole, but ig nored the differences among areas inside the city. But in fact, the traffic congestion in different areas with a city is mostly different. Taking typical megacities like Beijing, London, New York, and Tokyo as objects, this paper ma...

Internal armed conflicts dramatically affect vulnerable populations, especially children. Such traumatic events negative mentalhealth, including emotional, cognitive, and behavioral well-being. The present study sought to identify social cognition states characteristics of a child population who were victims forced displacement that was caused by the conflict in Colombia. sample consisted 140 c...

Air-to-air combat between two aggressive aircraft , both equipped with medium-range guided missiles, is .a key element of future air warfare. This dynamic coni lict can be viewed as an interaction of a twotarget diiferential game (between the air-craft) and two independent missileaircraft pursuit-evasion games. The information structure is, however, rather intricate: though perfect information ...

Seventeen years have gone by since Teres1 pointed to pat ient admission decision as one of t he great et hical di lemmas facing Departments of Intensive Care Medicine (DICMs) when such Departments have come close to their full capacity. He referred to this situat ion as “ the ritual of the last bed” – a very i l lust rat ive t erm t hat was widely adopt ed among intensivists, and which undersco...