Abstract: An equivalent circuit includes a first capacitor having a first capacitance, a circuit part configured to include an inductor component, a capacitor component, and a resistor connected in series with one another, the circuit part being connected in parallel with the first capacitor, and a second capacitor provided between the first capacitor and the circuit part and having a second capacitance. The first capacitance of the first capacitor changes in accordance with a voltage value of a direct current voltage applied to the first capacitor. The second capacitor has the positive second capacitance that changes in accordance with the voltage value of the direct current voltage applied to the first capacitor and that is N times (N>0) the first capacitance of the first capacitor.

Abstract: A CO2 emission estimation system includes a CO2 emission estimator. The CO2 emission estimator calculates an estimated value of CO2 emissions from an image forming apparatus when performing a job, using a CO2 emission estimation model as a formula for estimating the CO2 emissions and settings for the job. The CO2 emission estimation model is a formula where a multiple regression expression for determining an estimated value of a power consumption of the image forming apparatus when performing the job is multiplied by a CO2 emission factor. The CO2 emission estimation model has a plurality of explanatory variables each according to a different type of setting for the job.

Abstract: A display control device includes a progress acquirer that acquires progress of a plurality of processes for generating print products, a subdivision progress acquirer that acquires, in at least one of the plurality of processes, progress of subdivided processes obtained by subdividing the process, a process display that displays the plurality of processes on a display device so that at least one of the processes being executed is distinguishable, and a subdivided process display that displays the subdivided processes on the display device so that at least one of the subdivided processes being executed is distinguishable.

Abstract: A card reader includes a card reader main body, a board which is fixed to the card reader main body, a light emitting element which is disposed on a surface of the board, a cover member which is made of light transmissive material and covers the board from an opposite side to the card reader main body, and a code imaging part which images a one-dimensional code or a two-dimensional code. The cover member is formed with a card insertion port, and the code imaging part is held by the cover member and is disposed at a position adjacent to the card insertion port in a longitudinal direction of the card insertion port.

Abstract: A display control device includes a progress acquirer that acquires progress of a plurality of processes for generating print products, a subdivision progress acquirer that acquires, in at least one of the plurality of processes, progress of subdivided processes obtained by subdividing the process, a process display that displays the plurality of processes on a display device so that at least one of the processes being executed is distinguishable, and a subdivided process display that displays the subdivided processes on the display device so that at least one of the subdivided processes being executed is distinguishable.

Abstract: A card reader includes a card reader main body, a board which is fixed to the card reader main body, a light emitting element which is disposed on a surface of the board, a cover member which is made of light transmissive material and covers the board from an opposite side to the card reader main body, and a code imaging part which images a one-dimensional code or a two-dimensional code. The cover member is formed with a card insertion port, and the code imaging part is held by the cover member and is disposed at a position adjacent to the card insertion port in a longitudinal direction of the card insertion port.