Abstract: An electronic apparatus includes a user interface unit and a user authentication unit. The user interface unit displays on a display device a user authentication screen that includes an input field for a password, and determines an inputted character string to the input field by a user operation performed to an input device. The user authentication unit performs user authentication on the basis of the inputted character string and a preregistered password. The user interface unit (a) determines a sight direction of the user on the basis of a face image taken by an imaging device, (b) determines whether the sight direction points to a predetermined range that includes the input field, and (c) if the sight direction points to the predetermined range, displays the inputted character string in the input field, or if not, displays a mask character string in the input field.

Abstract: A display control apparatus includes: an operation acceptance section that accepts a user's input of an operation; a screen data storage section that stores a plurality of sets of screen data on respective display screens for being displayed; a display control section that allows display of the plurality of sets of screen data as the respective display screens while providing a transition from one display screen to another; a hiding section that, when the operation acceptance section accepts a specification of an area in the display screen, manipulates screen data present within the specified area to hide the area; and a transmission control section that measures a time elapsed since the transition, and, upon passage of a predetermined set time since the transition, provides transmission of the set of screen data or, when the area is hidden, the set of screen data containing the hidden area to an external terminal.

Abstract: An image processing apparatus includes a platen, a fixed-document detection unit, a determination unit, and a processing-target selection unit. The determination unit determines whether the document on the platen is a left document or not when the document on the document tray and the document on the platen are detected, upon acceptance of the document-reading-starting instruction by the instruction accepting unit. The processing-target selection unit sets image data obtained by a conveyed-document reading unit as a processing target when the determination unit determines that the document on the platen is the left document, and inquires which image data obtained by the conveyed-document reading unit and a fixed-document reading unit, to be set as the processing target of the user when the determination unit determines that the document on the platen is not the left document.

Abstract: An image processing apparatus includes a processing target selection unit. The processing target selection unit inquires which image data obtained by a conveyed-document reading unit or by a fixed-document reading unit, to be set as a processing target when a user determination unit has determined that users are identical, determines image data obtained by a conveyed-document reading unit as a processing target when the user determination unit has determined that the users are not identical and a determination unit has determined that the document on the platen is a left document, and inquires which image data image data obtained by the conveyed-document reading unit or by the fixed-document reading unit, to be set as the processing target when the user determination unit has determined that the users are not identical, and the determination unit has determined that the document on the platen is not a left document.

Abstract: An image forming apparatus includes: a tray on which at least one sheet is loaded; a sensor and a controller. The sensor measures overall weight of the sheet loaded on the tray. The controller calculates decrement from the overall weight measured by the sensor upon completion of a job. The controller calculates total weight of the sheet loaded on the tray through execution of the job. The controller executes a logout process based on the decrement and the total weight.

Abstract: An image forming apparatus includes: a tray on which at least one sheet is loaded; a sensor and a controller. The sensor measures overall weight of the sheet loaded on the tray. The controller calculates decrement from the overall weight measured by the sensor upon completion of a job. The controller calculates total weight of the sheet loaded on the tray through execution of the job. The controller executes a logout process based on the decrement and the total weight.

Abstract: An image processing apparatus includes a processing target selection unit. The processing target selection unit inquires which image data obtained by a conveyed-document reading unit or by a fixed-document reading unit, to be set as a processing target when a user determination unit has determined that users are identical, determines image data obtained by a conveyed-document reading unit as a processing target when the user determination unit has determined that the users are not identical and a determination unit has determined that the document on the platen is a left document, and inquires which image data image data obtained by the conveyed-document reading unit or by the fixed-document reading unit, to be set as the processing target when the user determination unit has determined that the users are not identical, and the determination unit has determined that the document on the platen is not a left document.

Abstract: An image processing apparatus includes a platen, a fixed-document detection unit, a determination unit, and a processing-target selection unit. The determination unit determines whether the document on the platen is a left document or not when the document on the document tray and the document on the platen are detected, upon acceptance of the document-reading-starting instruction by the instruction accepting unit. The processing-target selection unit sets image data obtained by a conveyed-document reading unit as a processing target when the determination unit determines that the document on the platen is the left document, and inquires which image data obtained by the conveyed-document reading unit and a fixed-document reading unit, to be set as the processing target of the user when the determination unit determines that the document on the platen is not the left document.

Abstract: A display input device includes a display unit and a touch panel unit. When the touch panel unit accepts a predetermined transmission start operation, the display unit starts a display in a transmission transition mode, performs a transmission transition display in which a transition source screen gradually disappears while a ratio of a display of a transition destination screen belonging to a next lower layer of the transition source screen as time passes, and repeats the transmission transition display toward a lower layer.

Abstract: A display input device includes a display unit and a touch panel unit. When the touch panel unit accepts a predetermined transmission start operation, the display unit starts a display in a transmission transition mode, performs a transmission transition display in which a transition source screen gradually disappears while a ratio of a display of a transition destination screen belonging to a next lower layer of the transition source screen as time passes, and repeats the transmission transition display toward a lower layer.

Abstract: A harmonic injection point a is set on a power line extending downstream from a harmonic measuring point b in an electric power system. The currents of interharmonics are injected to the harmonic injection point a by a current injection device. The frequencies of the interharmonics are located on both sides of the frequency of an n-th targeted harmonic in frequency spectrum and each of the frequencies is a nonintegral multiple of the frequency of a fundamental wave of an electric power transmitted by the electric power system. The current values and voltage values of the interharmonics at the harmonic measuring point are detected to thereby obtain admittance values of an equivalent circuit of a power line extending upstream from the harmonic measuring point b when the interharmonics flow therethrough. An admittance value of the equivalent circuit of the power line when the targeted harmonic flows therethrough is determined by interpolating the admittance values for the interharmonics.

Abstract: Frequencies fx between the measurement harmonic (mth-degree harmonic) and the (m±1)th-degree harmonics are determined from an expression of fx=(fs*m)±{(fs/n)*k)} where n and k are each an integer. Currents of inter-harmonics of the frequencies fx above and below the measurement harmonic are injected into an inject point in a power system in n cycles of the fundamental wave. Voltage at the inject point based on the injected currents and currents at least either upstream or downstream from the inject point are measured. Admittances for the inter-harmonics above and below the measurement harmonic on at least either the upstream or downstream side from the harmonic inject point are calculated from the measurement results. Interpolation processing based on the calculation results is performed, thereby finding and determining an admittance for the measurement harmonic.

Abstract: Single-phase currents at two frequencies f.alpha. and f.beta. (f.alpha.<n.multidot.fs<f.beta.) of non-integral multiples of a system fundamental wave frequency fs sandwiching an targeted harmonic (frequency n.multidot.fs) are injected between two phases of a three-phase power system as interharmonic currents. A frequency analysis of measurement current and measurement voltage of each phase in the system is carried out and a positive-phase-sequence current I1, a positive-phase-sequence voltage V1, a negative-phase-sequence current I2, and a negative-phase-sequence voltage V2 are detected for each of the two frequencies f.alpha. and f.beta. in the system based on injecting of the interharmonic currents. Positive-phase-sequence and negative-phase-sequence admittances Y1 and Y2 or positive-phase-sequence and negative-phase-sequence impedances Z1 and Z2 are found for each of the frequencies f.alpha. and f.beta. in the system as Y1=I1/V1 and Y2=I2/V2 or Z1=V1/I1 and Z2=V2/I2.

Abstract: The power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a number of power systems to form a large-scale power system. The power systems include power stations such as power plants and transformer substations. A simplified arithmetic processing unit of the stabilizer performs an arithmetic processing by a simple linear equation using an output frequency of a representative power station belonging to the separated power system immediately after the accident has been cleared, so that a total load drop of the separated power system can be assumed. Based on the assumption amount, balance control of demand and supply in the separated system is made.