Abstract: Provided is a water quality management apparatus for an aquaculture pond, the apparatus having a storage unit for storing water quality-related measured values measured at appropriate time intervals by external sensors set in the aquaculture pond, an assessment unit for calculating a predicted future value on the basis of fluctuations in the measured values and determining the time when the predicted value will exceed a reference value that indicates deterioration of water quality, and a display unit for displaying the time when the reference value will be exceeded. Said time is the time when exchange of pond water will be necessary.

Abstract: Provided is a water quality management apparatus for an aquaculture pond, the apparatus having a storage unit for storing water quality-related measured values measured at appropriate time intervals by external sensors set in the aquaculture pond, an assessment unit for calculating a predicted future value on the basis of fluctuations in the measured values and determining the time when the predicted value will exceed a reference value that indicates deterioration of water quality, and a display unit for displaying the time when the reference value will be exceeded. Said time is the time when exchange of pond water will be necessary.

Abstract: An electronic money holding device has a first storage unit for storing a uniquely assigned identification number and an amount of held electronic money, a processor for controlling the reference to and the updating of the amount of held electronic money and the transfer of electronic money between the electronic money holding device and another electronic money holding device, and a second storage unit for storing information of service providers concluding sales contracts with a possessor of the electronic money holding device and payment information of each sales contract.

Abstract: An electronic money holding device has a first storage unit for storing a uniquely assigned identification number and an amount of held electronic money, a processor for controlling the reference to and the updating of the amount of held electronic money and the transfer of electronic money between the electronic money holding device and another electronic money holding device, and a second storage unit for storing information of service providers concluding sales contracts with a possessor of the electronic money holding device and payment information of each sales contract.

Abstract: An electronic money holding device has a first storage unit for storing a uniquely assigned identification number and an amount of held electronic money, a processor for controlling the reference to and the updating of the amount of held electronic money and the transfer of electronic money between the electronic money holding device and another electronic money holding device, and a second storage unit for storing information of service providers concluding sales contracts with a possessor of the electronic money holding device and payment information of each sales contract.

Abstract: An electronic money holding device has a first storage unit for storing a uniquely assigned identification number and an amount of held electronic money, a processor for controlling the reference to and the updating of the amount of held electronic money and the transfer of electronic money between the electronic money holding device and another electronic money holding device, and a second storage unit for storing information of service providers concluding sales contracts with a possessor of the electronic money holding device and payment information of each sales contract.

Abstract: An electronic money holding device has a first storage unit for storing a uniquely assigned identification number and an amount of held electronic money, a processor for controlling the reference to and the updating of the amount of held electronic money and the transfer of electronic money between the electronic money holding device and another electronic money holding device, and a second storage unit for storing information of service providers concluding sales contracts with a possessor of the electronic money holding device and payment information of each sales contract.

Abstract: A printer with a sorter unit allows printed recording sheets to be sorted to a single tray selected from a plurality of trays by a recording sheet guide mechanism that pivots around a shaft. Thus, the printer can sort the printed sheets by page, by user, or discharge the printed sheets paginated or with the printed side facing upward. The sorter trays includes a first detection lever that is rotated by the weight of recording sheets and a second detection lever that rotates in association with the first detection lever. A lever detector is provided on the sorter guide to detect the movement of the second detection lever. The sorter or guide is also provided with a sheet detection lever to detect a jam in the sorter guide.

Abstract: A printer with a sorter unit allows printed recording sheets to be sorted to a single tray selected from a plurality of trays by a recording sheet guide mechanism that pivots around a shaft. Thus, the printer can sort the printed sheets by page, by user, or discharge the printed sheets paginated or with the printed side facing upward. The recording sheet guide mechanism is constructed to pivot around the shaft so that only a single drive unit is employed to select a tray for sorting. Thus, the printer has a simple and small structure. The printer has a recording sheet discharge outlet with discharge rollers for discharging a recording sheet that has been printed by the electrophotographic process.

Abstract: A linear guide apparatus includes an axially extending guide rail having ball rolling grooves formed in both side surfaces, and a slider movably straddling the guide rail and having ball rolling grooves formed in inner surfaces of both side walls. At least one of a clearance between an upper surface of the guide rail and a lower surface of the slider and a clearance between a side surface of the guide rail and an inner side surface of the slider is set smaller than the amount of displacement caused by an elastic deformation of contact portions at which the ball is in contact with the groove surfaces of the ball rolling grooves of the guide rail and the slider when a load equal to a fundamental static rating load is applied to the slider.

Abstract: An electrophotographic recording apparatus comprising these units which are arranged vertically: a sheet feeder for feeding a sheet of recording paper to a sheet feed inlet; an image forming unit for forming a printing image onto a photosensitive drum based on printing data and transferring the printing image onto the sheet; and a fixing unit for fixing the transferred image on the sheet. The apparatus further comprises a sheet switching guide mechanism by which the head end of the sheet is switched to both upper and lower directions. When the sheet switching guide mechanism is set to the upper direction, the printed sheet is forwarded by a sheet guide member to thereby pass through the printing path the sheet has already been through with the rear side of the sheet being the front, and the printing data is written from the last line during this process.

Abstract: A slide table has two parallel axial ball rolling grooves of Gothic arch-like cross section provided in each of the inclined surfaces of an outwardly opening trapezoidal groove and has axial through-bores providing ball passageways formed rearwardly of the ball rolling grooves. The track shaft has Gothic arch-like ball rolling grooves formed axially thereof and corresponding to the ball rolling grooves of the slide table. Each of the Gothic arch-like ball rolling grooves has a narrow escape groove provided in the bottom thereof. Each of the semicircular ball passageways has a narrow concave groove in the bottom thereof and is in the form of a recess. The retainer comprises a wire rod having a straight portion and semicircularly bent portions extending from the opposite ends of the straight portion. The semicircularly bent portions are engaged with the concave grooves of the side plates. The slide table is supported on the track shaft by four rows of balls which are in four-point contact.