Yahoo Japan Corporation

Dai Nippon Toryo Co., Ltd.

Nippon Steel & Sumikin Anti-corrosion Co., Ltd.

Kenji Fujimoto

Hiroshi Kihira

Takayuki Sato

Masanori Nagai

Tsuyoshi Matsumoto

Atsumi Imai

Yasuo Tomine

Takehide Aiga

A wireless communication terminal according to an embodiment includes a wireless LAN communication unit, a prediction unit which predicts a moving area of a user, an estimation unit, and a communication control unit. The estimation unit estimates a switching state of a wireless LAN connection in the wireless LAN communication unit, on the basis of a wireless LAN communication environment in the moving area predicted by the prediction unit. The communication unit restricts the wireless LAN connection in the wireless LAN communication unit, on the basis of the switching state estimated by the estimation unit.

Wireless communication terminal, wireless communication method, and wireless communication system

An inexpensive rotary grinding tool with reduced noise level of the grinding is provided. The rotary grinding tool comprises a metal disk having a grinding surface on at least a part of its surface and a holder for supporting the metal disk. The grinding surface has hard grains having a Mohs hardness in excess of 9 brazed thereon at a surface density of at least 20 grains/cm. The holder has at its center a securing means for securing the holder on rotary shaft of a rotary drive unit. The holder and the metal disk are joined together to constitute the rotary grinding tool.

Rotary grinding tool and its production method

Growing community of inventors

Tokyo, Japan

Kenji Fujimoto