Hiroki Kobayashi

Bio: Hiroki Kobayashi is an academic researcher from Fujitsu. The author has contributed to research in topics: Server & Principal component analysis. The author has an hindex of 7, co-authored 61 publications receiving 188 citations.

Authentication system, method of controlling the authentication system, and portable authentication apparatus

Abstract: A personal-identification-information transmitting unit transmits personal identification information. A portable authentication apparatus (10) receives the personal identification information, and performs an authentication process based on the personal identification information received and personal identification information (12a) stored in the portable authentication apparatus in advance. The portable authentication apparatus (10) includes a control unit (11) that controls provision of at least one of predetermined data (12a) and software (12b) to the information processing apparatus, based on a result of the authentication process. The portable authentication apparatus may take the form of a memory stick for insertion into a socket of a PC, and having a wireless link with the transmitting unit.

Server device, control device, server rack, recording medium storing cooling control program, and cooling control method

Abstract: A server device includes: electronic devices; a housing that houses the electronic devices; at least one fan; air volume control units configured to adjust a volume of cooling airflow which is generated by rotation of the at least one fan and is ventilated through the electronic devices by opening and closing of respective valves; a valve opening control unit configured to control valve opening degrees of the air volume control units so that temperatures inside the electronic devices become a given target temperature; a fan control unit configured to run the at least one fan at a fan rotating speed that achieves a volume of cooling airflow to make temperatures inside the electronic devices become the given target temperature at a valve opening degree higher than the valve opening degrees that the valve opening control unit controls.

Computer system and virtual machine arranging method

Abstract: A computer system includes plural servers in which virtual machines are arranged; plural power supply apparatuses that supply electric power to the servers; and a control apparatus that controls arrangement of the virtual machines in the servers. The control apparatus solves an integer programming problem whose objective function is total power consumption by the servers and by the power supply apparatuses, the total power consumption being described as a function of the arrangement of the virtual machines; and arranges the virtual machines based on a solution of the integer programming problem.

Apparatus and method for frame synchronization timing detection and mobile terminal

Abstract: A synchronization timing detecting method for a receiving device which receives a radio signal including a known symbol on a certain cycle and a gap period which is formed with a certain timing relation based on a transmit timing of the known symbol, wherein synchronization is not achieved in the gap period and the gap period has a longer duration than a certain time, includes receiving the radio signal to detect the gap period in which symbol synchronization is not achieved and which is longer than the certain time, and detecting the known symbol at a timing determined by the certain timing relation based on the gap period detected.

Method of controlling air conditioning, air-conditioning control system and air-conditioning control apparatus

Abstract: A method of controlling air conditioning to cool servers, the method includes selecting, when the number of operating servers is a certain threshold number or more, a first mode, in which the pressure of a cold aisle is set higher than the pressure of a hot aisle; selecting, when the number of operating servers is less than the certain threshold number, a second mode, in which the pressure of the cold aisle is set equal to the pressure of the hot aisle; and informing the operating servers of whether a current mode is the first mode or the second mode, and when the current mode is the first mode, driving fans of the servers at a minimum rotational speed in a specification, and when the current mode is the second mode, driving the fans of the servers at a rotational speed higher than the minimum rotational speed in the specification.

Systems and methods for managing cryptographic keys

Abstract: A common interface for managing cryptographic keys is provided. A request to manage a cryptographic key may be received in a first interface format, translated to a common interface format, and then executed remotely from the first interface. Return arguments may then be translated from the common interface format to a format compatible with the first interface and communicated securely to the first interface. The cryptographic keys may be used in connection with a secure data parser that secures data by randomly distributing data within a data set into two or more shares.

Information processing apparatus and information processing method

Abstract: An information-processing apparatus determines whether a stimulation generation unit and a background virtual object contact each other based on position and orientation information about the stimulation generation unit and position and orientation information about the background virtual object. If it is determined that the stimulation generation unit and the background virtual object contact each other, the information-processing apparatus determines whether the stimulation generation unit is included within an attention range. The information-processing apparatus generates operation setting information for controlling an operation of the stimulation generation unit according to a result of the determination and outputs the generated operation setting information to the stimulation generation unit.

3-D MOEMS mirror for laser beam pointing and focus control

Abstract: A biaxial torsion scan mirror with a deformable membrane surface is described. The 700-mm-diameter optical surface can be tilted /spl plusmn/4/spl deg/ about two orthogonal axes and can be deformed to a parabola with greater than 3-mm sag at the membrane center. The surface, therefore, acts as a lens with variable focal length ranging from /spl infin/ to 10 mm. Mirror architecture and applications in three-dimensional beam pointing and scanning are discussed.

Server rack system

Abstract: A server rack system includes a communication module, multiple internal devices, and an integrated management module (IMM) The internal devices are coupled to the communication module The IMM is coupled to the communication module and communicates with the internal devices through the communication module The IMM is pre-stored with a correspondence relationship between marker information, identification information, and asset numbers of the internal devices In operation of the system, the IMM reads the identification information of the internal devices through the communication module, and obtains a correspondence relationship between the marker information and asset numbers of the internal devices from the correspondence relationship according to the identification information to thereby perform asset management of the internal devices

Apparatus and method for efficient estimation of the energy dissipation of processor based systems

Abstract: A system and method of scheduling tasks, comprising receiving activity and performance data from registers or storage locations maintained by hardware and an operating system; storing calibration coefficients associated with the activity and performance data; computing an energy dissipation rate based on at least the activity and performance data; and scheduling tasks under the operating system based on the computed energy dissipation rate.