Abstract: A memory device management system includes a first key acquisition unit that acquires a first key, a second key generation unit that generates a second key in accordance with a configuration of a memory device that is a management target, an equality determination unit that determines an equality between a value of the first key and a value of the second key, and a data erasure processing unit that erases data stored in the memory device in a case of a determination that the value of the first key and the value of the second key are different.

Abstract: A memory device management system includes a first key acquisition unit that acquires a first key, a second key generation unit that generates a second key in accordance with a configuration of a memory device that is a management target, an equality determination unit that determines an equality between a value of the first key and a value of the second key, and a data erasure processing unit that erases data stored in the memory device in a case of a determination that the value of the first key and the value of the second key are different.

Abstract: A motor controller apparatus detects an electric current phase of a drive current supplied to a stepping motor, detects a rotational phase of a rotor of the stepping motor, obtains a phase difference between the electric current phase detected by the first detection unit and the rotational phase detected by the second detection unit. The apparatus, in a first period, controls the stepping motor such that the phase difference becomes a predetermined phase deviation, and, in a second period in which fluctuation of load on the stepping motor is smaller than in the first period, controls the stepping motor such that the drive current does not fall below a predetermined electric current value.

Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.

Abstract: A current resonance type switching power supply device controls an ON/OFF operation of two switching elements according to an amount of change in voltage of a current resonance capacitor.

Abstract: A current resonance power supply includes a current detecting unit detecting a current flowing through a primary side of a transformer and a current compensating unit compensating the current detected by the current detecting unit in accordance with a variation in voltage input into the primary side of the transformer. The current resonance power supply detects overcurrent on the basis of an output from the current compensating unit.

Abstract: An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.

Abstract: The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information.

Abstract: A file server is replaced efficiently. A computer system includes a first file server, a second file server, and a third file server. The first file server retains file data storage information which indicates, for each file, whether data of the relevant file is stored in a first storage device or not; and after a data input/output request from a client terminal is switched from the first file server to the third file server, the third file server selects either the first file server or the second file server as a data transfer request destination of a target file of the data input/output request from the client terminal, based on the file data storage information sent from the first file server.

Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.

Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.

Abstract: A current resonance type switching power supply device controls an ON/OFF operation of two switching elements according to an amount of change in voltage of a current resonance capacitor.

Abstract: The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information.

Abstract: A current resonance power supply includes a current detecting unit detecting a current flowing through a primary side of a transformer and a current compensating unit compensating the current detected by the current detecting unit in accordance with a variation in voltage input into the primary side of the transformer. The current resonance power supply detects overcurrent on the basis of an output from the current compensating unit.

Abstract: An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.

Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.

Abstract: An image forming apparatus is provided, in which there occurs no pulling of a recording medium at different portions, and also, vibration of a trailing end of the recording medium during the time when the trailing end of the recording medium is passed through the transferring portion is suppressed. Thus, no deterioration occurs in image quality such as disturbance of a toner image.

Abstract: An image forming apparatus is provided, in which there occurs no pulling of a recording medium at different portions, and also, vibration of a trailing end of the recording medium during the time when the trailing end of the recording medium is passed through the transferring portion is suppressed. Thus, no deterioration occurs in image quality such as disturbance of a toner image.