논문

총 게시글 623건

183

이상희, 지창우, 전태수 | Journal of Environmental Toxicology 2009/24 (2009)

182

Sang-Hee Lee, N. -Y. Su, and M. Lee | Journal of Asia pacific entomology 12/3 (2009)

초록

Subterranean termites forage by digging a network of tunnels to come into contact with food sources. When 1000 termites (Coptotermes formosanus Shiraki) were placed in a laboratory arena, 6.7 primary tunnels were constructed. The aim of this study was to explain the empirical observation in which termites restrict the number of primary tunnels. To this end, we constructed a model to simulate termite tunnel patterns based on empirical data and to calculate food transportation efficiency, γ, for the tunnel patterns. The efficiency was defined as the ratio of the number of encountered food particles to the sum of the shortest length from the location of encountered food particles to the initial position of growth of the tunnel. The γ was maximized when the number of primary tunnels was 5 or 6, which was fairly consistent with the empirical number of primary tunnels. This result indicated that termites may restrict the number of their primary tunnels to improve the transportation efficiency, which is directly related to their survival.

초록

Subterranean termites forage by digging a network of tunnels to come into contact with food sources. When 1000 termites (Coptotermes formosanus Shiraki) were placed in a laboratory arena, 6.7 primary tunnels were constructed. The aim of this study was to explain the empirical observation in which termites restrict the number of primary tunnels. To this end, we constructed a model to simulate termite tunnel patterns based on empirical data and to calculate food transportation efficiency, γ, for the tunnel patterns. The efficiency was defined as the ratio of the number of encountered food particles to the sum of the shortest length from the location of encountered food particles to the initial position of growth of the tunnel. The γ was maximized when the number of primary tunnels was 5 or 6, which was fairly consistent with the empirical number of primary tunnels. This result indicated that termites may restrict the number of their primary tunnels to improve the transportation efficiency, which is directly related to their survival.

181

Minkyu KimAtsushi FujiokaBerkant Ustao？lu | IWSEC 2009 2009 (2009)

180

MoonShik LeeDaegun MaMinJae Seo | ACNS 2009 2009 (2009)

179

Mehmet Acikgoza, Ismail Naci Cangulb, Daeyeoul Kimc, and Yilmaz Simsekd | AIP Conference Proceedings 1168/1 (2009)

178

Security Analysis of Two Certificateless Signature Schemes

심경아, 이주희, 이향숙 | Journal of the Korea Institute of Information Security & Cryptology (정보보호학회논문지) 19/6 (2009)

177

Decomposition theorem on G-space

Taeyoung Choi and J.Kim | Osaka Journal of Mathematics 46-1 (2009)

초록

In this paper, we introduce the weak $G$ -expansivity which is a generalization of both expansivity and $G$ -expansivity. Also, we define $G$ -stable and $G$ -unstable sets of a homeomorphism on a metric $G$ -space $X$ and investigate properties of them. Finally, we consider the decomposition theorem on $G$ -spaces.

초록

In this paper, we introduce the weak $G$ -expansivity which is a generalization of both expansivity and $G$ -expansivity. Also, we define $G$ -stable and $G$ -unstable sets of a homeomorphism on a metric $G$ -space $X$ and investigate properties of them. Finally, we consider the decomposition theorem on $G$ -spaces.