Abstract: A display apparatus is provided with an interface, a storage device, an antenna and a processing device. The interface connects to a given network. The storage device stores data to be used to perform a communication with an external host controller via the network. The antenna performs a near field communication with an external terminal. The processing device transmits the data to the terminal in response to a request from the terminal and stores other data received from the terminal in response to another request from the terminal in the storage device.

Abstract: A display apparatus is provided with an interface, a storage device, an antenna and a processing device. The interface connects to a given network. The storage device stores data to be used to perform a communication with an external host controller via the network. The antenna performs a near field communication with an external terminal. The processing device transmits the data to the terminal in response to a request from the terminal and stores other data received from the terminal in response to another request from the terminal in the storage device.

Abstract: Provided is a power saving control method and system for data storage devices or electrical equipment. Herein, data items are divided into groups according to required response times or access frequencies. The groups of data items are allocated to data storage devices or pieces of electrical equipment. A data storage device or electrical equipment to which data that may be accessed using a long response time at a low access frequency is set to a power-saving mode of a higher level. Consequently, the data storage devices or pieces of electrical equipment are provided with power-saving features of different levels. Eventually, energy saving can be achieved more efficiently.

Abstract: Provided is a power saving control method and system for data storage devices or electrical equipment. Herein, data items are divided into groups according to required response times or access frequencies. The groups of data items are allocated to data storage devices or pieces of electrical equipment. A data storage device or electrical equipment to which data that may be accessed using a long response time at a low access frequency is set to a power-saving mode of a higher level. Consequently, the data storage devices or pieces of electrical equipment are provided with power-saving features of different levels. Eventually, energy saving can be achieved more efficiently.

Abstract: In a pressure differential automatic transfer type three-way valve utilized in a heat-pump type refrigeration system together with a transfer valve for transferring an operating state of the refrigeration system, the three-way valve is formed with a leakage passage having a leakage resistance determined by flow resistance of the transfer valve, leakage resistance thereof and flow resistance of the three-way valve.