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- Hiroshi Nagamochi, Kohei Okada
- Inf. Process. Lett.
- 2007

Given an edge-weighted rooted tree T and a positive integer p ( n), where n is the number of vertices in T , we cover all vertices in T by a set of p subtrees each of which contains the root r of T .â€¦ (More)

- Kimio Oguchi, Yasuhisa Okazaki, Shohei Terada, Kohei Okada, Kunio Tojo
- 2006 3rd IEEE/EMBS International Summer School onâ€¦
- 2006

Vital information sensing is the key to coping with the coming aging society. The home network will be the infrastructure best placed to provide such functionality. The next generation convergenceâ€¦ (More)

- Kimio Oguchi, Kohei Okada
- TENCON 2005 - 2005 IEEE Region 10 Conference
- 2005

The wavelength transfer matrix is a powerful approach to design and verify the wavelength routing needed for complicated wavelength routing networks. This paper first describes the wavelengthâ€¦ (More)

- Kimio Oguchi, Kohei Okada, Shohei Terada, Kunio Tojo
- 2007 16th International Conference on Computerâ€¦
- 2007

A new optical VPN configuration is proposed for implementation on a WDM PON that uses wavelength routers with multi stage AWGs. The proposed configuration offers the features of scalability andâ€¦ (More)

- Takeshi Misono, Kohei Okada, Kenichi Sakai, Masahiko Abe, Hideki Sakai
- Journal of oleo science
- 2016

The interfacial properties of polyoxyethylene alkyl ether-type nonionic surfactants (CnEm) were studied in a hydrophilic room-temperature ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborateâ€¦ (More)

- Hiroshi Nagamochi, Kohei Okada
- Discrete Applied Mathematics
- 2004

Given an edge-weighted tree T and an integer pÂ¿ 1, the minmax p-traveling salesmen problem on a tree T asks to /nd p tours such that the union of the p tours covers all the vertices. The objective isâ€¦ (More)

- Hiroshi Nagamochi, Kohei Okada
- ISAAC
- 2003

- Kenichi Sakai, Kohei Okada, +5 authors Hideki Sakai
- Langmuir : the ACS journal of surfaces andâ€¦
- 2015

Effects of the addition of water on solvation layers of imidazolium-type room temperature ionic liquids (RT-ILs) have been studied through force curve measurements of atomic force microscopy (AFM).â€¦ (More)

- Kohei Okada, Shinya Nakamura, Masahiro Nakajima, Taeko Ando
- 2017 International Symposium on Microâ€¦
- 2017

This study reports our two unpredictable behaviors for fracture of nano-scale silicon with 100 nm thickness. We developed a novel tensile testing method conducted on silicon chip to observe a localâ€¦ (More)

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