Hitachi, Ltd.

Nec Corporation

Osamu Otsuka

Toshiaki Morita

Toshiya Satoh

Atsushi Saito

Kazuhiro Suzuki

Hiroshi Hozoji

Katsunori Azuma

Yoshimasa Takahashi

Katsuhiro Higuchi

Toshiya Sato

Hiroshi Houzouji

Hidekazu Nishidai

Mobile radio equipment and a transmission rate controlling method thereof for reducing the rate of transmission between the mobile radio equipment and a base station when the transmission rate is beyond the capability of the application function of the mobile radio equipment to thereby use the resources of the radio base station effectively. A radio transmitter/receiver receives data or radio signals via an antenna. A transmission system function CPU converts or customizes the data to a data format acceptable to an application function CPU. Subsequently, the transmission system function CPU inputs the data via a data input/output section into a data input/output section of the application function CPU. A decoderis fed with the data input to the data input/output section. After that, the data is decoded by the decoder, and output from an input/output section according to the format of the decoded data.

Mobile radio equipment and method of controlling transmission rate for mobile radio equipment

A semiconductor device in which the lifetime of mounted components can be prolonged. A cooling system for controlling the temperature of a refrigerant through a heating section and a radiator is provided. The semiconductor device is connected to the cooling system and is cooled. A variation width (&#x394;T) of temperature controlled by the cooling system through the heating section and the radiator is smaller than a temperature variation (&#x394;T) of the refrigerant caused by variations in operating conditions of the semiconductor device (&#x394;T&#x2266;&#x394;T).

Semiconductor device

The power conversion apparatus uses the semiconductor device. Said semiconductor device includes a first group of power semiconductor elements at least one of which is electrically connected between a first potential and a third potential, a second group of power semiconductor elements at least one of which is electrically connected between a second potential and the third potential, and a third group of power semiconductor elements at least one of which is electrically connected between the first potential and the third potential. The second group is disposed between the first group and third group. Thereby, a low-loss semiconductor device having both inductance reducibility and heat generation balancing capability and also an electric power conversion apparatus using the same is provided.

Semiconductor device and power conversion apparatus using the same

A management system for memory capacity, in which vacant capacity of a memory in a mobile terminal is secured in case that the mobile terminal has a shortage in its memory for obtaining a large amount of data and the large amount of data can be stored in the mobile terminal, is provide. An Internet service management server provides a data management means that makes some data storing in a mobile terminal transfer to a data memorizing means in the Internet service management server. The data management means compares the amount of data, which the mobile terminal desires to obtain from the Internet, with vacant capacity of the mobile terminal. When the vacant capacity of the mobile terminal is not sufficient for obtaining the amount of data desired to obtain by the mobile terminal, the data management means makes some data storing in the mobile terminal transfer to the data memorizing means in the Internet service management server. With this, the vacant capacity for the amount of data desired to obtain by the mobile terminal can be secured in the mobile terminal.

Management apparatus, management system, management method, and management program for memory capacity of mobile terminals

Growing community of inventors

Tokyo, Japan

Osamu Otsuka