Tdk Corporation

Kabushiki Kaisha Toshiba

Namco Limited

Norio Sasaki

Yoshiharu Watanabe

Setsuo Yamamoto

Yuji Umeda

Kouji Takahashi

Masaru Abe

Noboru Narikawa

Takuji Takayama

A dielectric ceramic composition of the invention comprises a main component expressed in a compositional formula of (BaCaSr)(TiZr)O, a first subcomponent of at least one compound selected from La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y, a second subcomponent of at least one compound selected from Si and Ag.

Dielectric ceramic composition and an electronic component

A security device, a key device and a program protection system and method capable of coping with copy protection evading software or the modification of a board. A comparison is made between a security code unique to a game program which is obtained from a prestored key code and a security code obtained by generating a random number by using a game program stored in a storage device as an initial value. When they disagree, the operation of the function module is stopped. The copy protection is executed by hardware. By integrally forming the hardware and the function module, it is possible to cope with copy protection evading software or the modification of a board.

Security device, key device, and program protection system and method

A high permittivity dielectric ceramic composition wherein a main component includes BaTiO: 74.24 to 79.97 mol %, BaZrO: 5.69 to 12.04 mol %, CaTiO: 7.84 to 12.13 mol %, MgTiO: 3.11 to 4.72 mol % and BiTiO: 0.10 to 0.60 mol %. With respect to 100 wt % of the main component, 0.1 or less (excepting 0) of NiO, 0.1 wt % or less (excepting 0) of CeO, and 0.2 wt % or less (excepting 0) of MnO are included. In accordance with need, 0.2 wt % or less (excepting 0) of SiOis further included with respect to 100 wt % of the main component. A high relative permittivity, such as 9000 or more, a high AC breakdown voltage, and a small electrostatic capacity change rage with respect to temperature can be obtained.

High permittivity dielectric ceramic composition and electronic device

A dielectric ceramic composition having the composition represented by formula (1):

Dielectric ceramic composition

A routing system for finding a route which satisfies predetermined limiting conditions in a space of an object space with an aid of a computer, includes a first processor for dividing at least the object area into a plurality of areas and extracting a divided area or divided areas which satisfy the predetermined limiting conditions from the plurality of divided areas, and a second processor for further dividing the divided area or divided areas extracted by the first processor into a plurality of subdivided areas and extracting a subdivided area or subdivided areas which satisfy the predetermined limiting conditions from the plurality of subdivided areas.

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Tokyo, Japan

Norio Sasaki