Abstract: If an ink amount supplied from an ink tank to an ejection head reaches a predetermined limit value, ink ejection is not permitted. If initialization data are input and the input initialization data are appropriate, a count value of the ink amount is initialized, and the ink ejection is started again. In addition, the initialization data which is input once and determined to be appropriate is determined to be inappropriate thereafter. By doing so, although ink of which the property and state are inappropriate is used for the refilling, since appropriate initialization data may not be input, it is possible to avoid the inappropriate ink from being used for the refilling.

Abstract: The electronic component mounting line includes computing unit for calculating a print position of solder paste printed on board-side electrodes, electronic component placement device for placing an electronic component onto the board-side electrodes by referencing the print position of the solder paste, placement position control device for controlling the placement position of the electronic component by referencing the print position of the solder paste, bonding device for melting the solder paste to bond the electronic component and the board-side electrodes to each other, and mounting-position control device for controlling the mounting position of the electronic component by referencing the board-side electrode position. In this configuration, position control responsive to a displacement of the electronic component by the self alignment effect exerted by the molten solder paste is fulfilled.

Abstract: A frame transmission device having a port for transmitting and receiving a frame and a learning table for storing a transmission source address included in the frame received at the port and the receiving port in association with each other includes: a port detector for detecting whether learning data coincident with the transmission source address included in the frame received at the port is stored in the learning table; a port judging unit for comparing a port learned in the learning data detected by the port detector to the receiving port; and a loop judging unit for judging on the basis of a time lapse from the storage of the learning data whether the frame is in a loop or not when the port learned in the learning data is not coincident with the receiving port.

Abstract: The disclosed apparatus includes a MAC learning table storing a MAC address and port identification information that uniquely identifies a port for transferring a frame to which the MAC address is assigned. The apparatus includes updating the MAC learning table, reading a MAC address of a link trace frame, transferring the link trace frame via a port determined based on the MAC learning table, storing a correspondence relationship of a predetermined MAC address and port identification information, saving a correspondence relationship set as an object to be deleted at a time of updating the MAC learning table, transferring the link trace frame, if there is no correspondence relationship relevant to the MAC address of the link trace frame in the MAC learning table, and sending a response frame to a switching hub which is an originator of the link trace frame with transfer of the link trace frame.

Abstract: A disclosed download method for downloading software to a transmission device constituting a network includes the steps of: searching for an unused channel between the transmission device and an adjacent transmission device and setting up a cross-connect for the unused channel so as to set up a communication channel for transferring software; transmitting the software stored in a software storage unit to the adjacent transmission device via the communication channel; and receiving software transferred from the adjacent transmission device via the communication channel and storing the software in the software storage unit.

Abstract: To provide an information search device, a computer program for searching information and an information search method for simply providing a broad range of information with brevity to a user.

Abstract: A method for inspection of circuit boards is described which includes: a process of measuring surface-shape data of a circuit board on which inspection objects are placed; an approximated curved surface generation process for generating an approximated curved surface from the measured surface-shape data, which is an estimated surface-shape of the circuit board, on which no inspection object is placed; a process of subtracting said approximated curved surface from the measured surface-shape data; a region of interest determination process of determining regions which are different from the approximated curved surface in accordance with data obtained by said subtraction process; and a process of inspecting whether electronic parts placed on said circuit board and connecting materials for connecting the electronic parts are in a desired state or not.

Abstract: The present invention is to propose a circuit board inspection method and its apparatus in which extraction of all of minute parts placed on a circuit board is possible without being influenced by an amount of deformation of the circuit board; according to the present invention, the method for inspecting the circuit board comprises a step of measuring a 3-dimensional shape of the circuit board which is an inspection object and making it to be a surface-shape measurement data, a step of automatically estimating the amount of deformation of the circuit board from measured surface-shape measurement data of whole of the surface of the circuit board, a step of automatically generating an approximated curved surface of the circuit board from an estimated result of the above-mention step, and a step of performing a subtraction process between the approximated curved surface generated in the abovementioned step and the surface-shape measurement data; the apparatus for inspecting the circuit board comprises processing

Abstract: An interface circuit which is connected between a peripheral device and a computer and which can conduct a data transfer at a higher speed. When a first digital data D.sub.1 is output from a peripheral device, the transfer of a memory bus enable request signal DRQ to a computer is halted by transfer control means, and the first digital data is output from the peripheral device in accordance with a false read control signal FIOR from an interface circuit, and held in hold means. When a second digital data is output from the peripheral device, DRQ is transferred to the computer, and 2N-bit data, i.e., N-bit second digital data D.sub.2 output from the peripheral device, and the N-bit first digital data D.sub.1 which is held are simultaneously transferred to the computer in accordance with a read control signal IOR from the computer.