Abstract: Resource use efficiency is improved while realizing quality guarantee of an application. A resource allocation device includes a storage unit that stores resource capacity information indicating a capacity of each of server resources, an SLI information collection unit that acquires information regarding an SLI at a predetermined time interval with regard to each of a plurality of applications, and a resource allocation determination unit that calculates an allocation resource amount of each application using a moving average and a standard deviation of the acquired information regarding the SLI during a predetermined period, and determines server resources which are allocation destinations of the applications by sorting the applications in descending order of the allocation resource amounts and sequentially adding the allocation resource amounts of the sorted applications within a range which does not exceed a capacity of each server resource in descending order of the allocation resource amounts.

Abstract: The processing performance of an entire system is enhanced by efficiently using CPU resources shared by a plurality of guests. A server 10 includes a host OS 104 and a plurality of guest OSs 110A and 110B running on a plurality of virtual machines 108A and 108B, respectively, which are virtually constructed on the host OS 104. The plurality of virtual machines 108A and 108B shares CPU resources implemented by hardware 102. A guest priority calculation unit 202 of a resource management device (resource management unit 20) calculates a processing priority of at least one of the guest OSs 110 based on at least one of a packet transfer rate from the host OS 104 to the guest OS 110 and an available capacity status of a kernel buffer of the host OS 104. A resource utilization control unit 204 controls allocation of a utilization time for CPU resources to be used by the plurality of guest OSs 110 based on the calculated processing priority.

Abstract: Resource use efficiency is improved while realizing quality guarantee of an application. A resource allocation. device 10 includes a storage unit 13 that stores resource capacity information 120 indicating a capacity of each of server resources 200, an SLI information collection unit 11 that acquires information regarding an SLI at a predetermined time interval with regard to each of a plurality of applications 2, and a resource allocation determination unit 12 that calculates an allocation resource amount of each application 2 using a moving average and a standard deviation of the acquired informs information regarding the SLI during a predetermined period, and determines server resources 200 which are allocation. destinations of the applications 2 by sorting the applications 2 in descending order of the allocation resource amounts and sequentially adding the allocation resource amounts of the sorted.

Abstract: Diaphragm blades move in a direction approaching to or separated from an optical axis of an incident light at the time of operation. Opening edges of the diaphragm blades are provided with neutral density (ND) filters having a predetermined transmittance to pass the incident light. Edges of the ND filters are provided with inclined surfaces having a predetermined angle with respect to the optical axis. With this configuration, flare is suppressed and image quality is enhanced.

Abstract: Diaphragm blades move in a direction approaching to or separated from an optical axis of an incident light at the time of operation. Opening edges of the diaphragm blades are provided with neutral density (ND) filters having a predetermined transmittance to pass the incident light. Edges of the ND filters are provided with inclined surfaces having a predetermined angle with respect to the optical axis. With this configuration, flare is suppressed and image quality is enhanced.