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456 results on '"Yashiro T"'

1. On Crossing Changes for Surface-Knots

Author

Kharusi, A. Al and Yashiro, T.

Subjects
Mathematics - Algebraic Topology, Mathematics - Geometric Topology
Abstract

In this paper, we discuss the crossing change operation along exchangeable double curves of a surface-knot diagram. We show that under certain condition, a finite sequence of Roseman moves preserves the property of those exchangeable double curves. As an application for this result, we also define a numerical invariant for a set of surface-knots called $du$-exchangeable set.

Published
2015

2. No surface-knot of genus one has triple point number two

Author

Kharusi, A. Al and Yashiro, T.

Subjects
Mathematics - Algebraic Topology, Mathematics - Geometric Topology
Abstract

It is known that there is no 2-knot with triple point number two. The present work shows that there is no surface-knot of genus one with triple point number two. In order to prove the result, we use Roseman moves and the algebraic intersection number of simple closed curves in the double decker set.

Published
2015

7. The Development of a Route Generation Procedure Incorporating Collision Avoidance Applicable to Automatic Maneuvering — The Effective Utilization of Collision Avoidance Polygons

Author

Wakabayashi, N., Irena Jurdana, and Yashiro, T.

Subjects
Automated Ship Navigation, Collision Avoidance, TCS (Track Control System), AIS target, Radar TT, ComputerApplications_COMPUTERSINOTHERSYSTEMS
Abstract

In recent years, study on automatic navigation of ships has been progressing. The level of automation can be divided into several levels, from those that assist manned navigators by providing information for maneuvering, to those that are completely unmanned. This should be done step by step, solving technical and legal issues. Our research aims to develop a procedure for automatically maneuvering with collision avoidance based on the surrounding information for targets of ships, which is important for automating maneuvering. For this purpose, we propose a new concept, CAP (Collision Avoidance Polygon). In this paper, we describe the method of generating CAP, the procedure for generating safety routes to avoid collision, and the development of a simulation environment for its evaluation. By using this concept of CAP, a route avoiding collisions can be generated with simple procedures without employing complicated mechanisms such as AI (Artificial Intelligence).

Published
2020

16. Welcome message from MUSICAL 2016 chairs

Author

Ouchi, K., Yashiro, T., Kato, Y., Yoshihiro, T., Zeinalipour-Yazdi, Constantinos D., and Zeinalipour-Yazdi, Constantinos D. [0000-0002-8388-1549]

Abstract

28-November-2016 Sponsors: Clarion et al. KDDI Research, Inc. Konica Minolta Science and Technology Foundation Recruit Technologies Co., Ltd. Yahoo Japan Corporation Conference code: 125327

Published
2016

19. Preadaptation for asexual queen succession: queen tychoparthenogenesis produces neotenic queens in the termite <italic>Reticulitermes okinawanus</italic>.

Author

Nozaki, T., Yashiro, T., and Matsuura, K.

Abstract

Social insects have evolved diverse breeding systems. In the termite species Reticulitermes speratus, queens produce their neotenic replacements parthenogenetically while producing other colony members sexually. This asexual queen succession (AQS) system enables the colony to undergo queen succession and increase the number of queens while avoiding king-daughter inbreeding, which must otherwise result in loss of genetic diversity in the workforce. The evolution of this sophisticated breeding system requires both parthenogenetic ability and parthenogens’ developmental priority to become neotenic queens. However, the evolutionary process of these two components is unknown. In this study, we investigated the caste fate of the offspring produced by tychoparthenogenesis in a non-AQS termite species Reticulitermes okinawanus. The hatching rate of unfertilized eggs in R. okinawanus (0.97%) was much lower than that in the AQS species R. speratus (75%). Flow cytometry and genetic analyses were used to demonstrate that R. okinawanus tychoparthenogenesis produced diploid homozygous females. One-third of the daughters from unfertilized eggs developed into neotenics, while no sexually produced daughters differentiated into neotenics. These results suggest that parthenogenetic daughters have the developmental propensity to become neotenic queens prior to the inception of AQS. [ABSTRACT FROM AUTHOR]

Published
2018
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22. The collaboration between Int J Life Cycle Assess and J LCA Jpn

Author

Matsuno, Y., Kondo, Y., Mishima, N., Shibaoke, N., Yashiro, T., Yamamoto, Y., Morioka, T., Nissen, N.F., Schischke, K., Stobbe, L., Reichl, H., Kurihara, S., Nakano, K., Hirao, M., Kai, H., Ishibashi, Y., Shimase, H., Kamohara, S., Takemasa, T., Higo, M., Dowaki, K., Genchi, Y., Motoshita, M., Itsubo, N., Inaba, A., Torii, M., Narita, N., Ogawa, K., Hondo, H., Hirayama, Y., Nakajima, K., Yamada, S., Fukuhara, I., and Publica

Published
2009

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