Abstract: A system includes circuitry configured to determine available electric energy to be supplied to each of a plurality of servers over a predetermined period of time based on electric energy generated by alternative energy sources for each of the plurality of servers disposed at a plurality of geographically separate locations, each of the plurality of servers being configured to run a virtual machine. The circuitry is further configured to control a virtual machine running on a first server of the plurality of servers to migrate to a second server of the plurality of servers, which is determined to have a larger amount of available electric energy than the first server.

Abstract: An apparatus includes a memory configured to hold a condition for determining whether or not to migrate a virtual machine that runs on a certain information processing apparatus included in a plurality of information processing apparatuses, to other information processing apparatus included in the plurality of information processing apparatuses, and a processor coupled to the memory and configured to when the condition is satisfied in a first information processing apparatus included in the plurality of information processing apparatuses, migrate a first virtual machine that runs on the first information processing apparatus to another information processing apparatus included in the plurality of information processing apparatuses, after migrating the first virtual machine, detect a status of an error occurring in the first information processing apparatus, and change the condition, based on the detected status of the error.

Abstract: An information processing apparatus includes a memory and a processor. The processor is coupled to the memory. The processor acquires information on the safety of locations where multiple data centers are placed through a network. The multiple data centers are able to communicate with one another. The processor calculates scores respectively indicating the safety of the multiple data centers on the basis of the acquired information. The processor further determines whether to move virtual machines built on each of the multiple data centers on the basis of the scores. The processor moves virtual machines placed in one data center to another data center on the basis of a result of the determination.

Abstract: An apparatus includes a memory configured to hold a condition for determining whether or not to migrate a virtual machine that runs on a certain information processing apparatus included in a plurality of information processing apparatuses, to other information processing apparatus included in the plurality of information processing apparatuses, and a processor coupled to the memory and configured to when the condition is satisfied in a first information processing apparatus included in the plurality of information processing apparatuses, migrate a first virtual machine that runs on the first information processing apparatus to another information processing apparatus included in the plurality of information processing apparatuses, after migrating the first virtual machine, detect a status of an error occurring in the first information processing apparatus, and change the condition, based on the detected status of the error.

Abstract: A system includes circuitry configured to determine available electric energy to be supplied to each of a plurality of servers over a predetermined period of time based on electric energy generated by alternative energy sources for each of the plurality of servers disposed at a plurality of geographically separate locations, each of the plurality of servers being configured to run a virtual machine. The circuitry is further configured to control a virtual machine running on a first server of the plurality of servers to migrate to a second server of the plurality of servers, which is determined to have a larger amount of available electric energy than the first server.

Abstract: A housing allocation device includes a processor. The processor is configured to obtain respective power consumption values of a plurality of housings installed in a room. The processor is configured to determine, on basis of the obtained power consumption values, first housings each have a power consumption value larger than a predetermined value. The processor is configured to select, as mounting destination candidates for a mounting destination of a first electronic apparatus to be installed in the room, second housings each of which accommodates the first electronic apparatus and faces none of the first housings from the plurality of housings on basis of arrangement information indicating arrangement of the plurality of housings in the room. The processor is configured to output information regarding at least one of the mounting destination candidates.

Abstract: In an operational transconductance amplifier (OTA), resistors are bridge-connected to source terminals of MOSFETs that form a differential pair of the OTA. Capacitors are connected in parallel between the resistors in order to remove a DC signal component. The C-R circuit forms a high pass filter in order to intercept the DC component. Accordingly, even if there is a difference in transistor characteristic between the MOSFETs, a DC offset voltage does not appear in differential output terminals of the OTA and an output error can be eliminated. When the OTA is used in an AGC amplifier, an output dynamic range of the AGC amplifier can be made wide owing to the removal of the DC offset voltage.

Abstract: In an operational transconductance amplifier (OTA), resistors are bridge-connected to source terminals of MOSFETs that form a differential pair of the OTA. Capacitors are connected in parallel between the resistors in order to remove a DC signal component. The C-R circuit forms a high pass filter in order to intercept the DC component. Accordingly, even if there is a difference in transistor characteristic between the MOSFETs, a DC offset voltage does not appear in differential output terminals of the OTA and an output error can be eliminated. When the OTA is used in an AGC amplifier, an output dynamic range of the AGC amplifier can be made wide owing to the removal of the DC offset voltage.