Abstract: So as to provide a network service that allows a specific service to be provided and received safely for both the user and service provider, a service provider providing a user identification file that is installed in a client computer used by a user whose user eligibility is confirmed in advance. Upon request for access from the client computer, the service provider checks for the presence of a user identification file residing in the client computer in the browser screen and provides a specific service only for access requests from the client computer confirmed to have user identification files. User identification files have no effects on pre-installed programs of the client computer when they are installed and are equipped with computer identification symbols whose presence can be checked in the browser screen.

Abstract: A scanner includes a light-beam emitter for emitting a light beam; a light-beam deflector for deflecting the light beam to scan a scanning surface; a photo-detector provided at a position outside an image-forming scanning range of the scanning surface to detect a scanning light beam before the scanning light beam starts generating a scanning line in the image-forming scanning range; a rotatable member, located in front of an incident surface of the photo-detector, that is rotatable about a rotational axis perpendicular to a plane defined by the scanning light beam by the deflector; an optical member, provided on the rotatable member, that allows the scanning light beam to pass therethrough to be incident upon the incident surface of the photo-detector; and a device for adjusting rotational position of the rotatable member about the rotational axis.

Abstract: A digital information reproduction apparatus for compressing frames of data so as to intermittently reproduce the data in fast-forward speed. A data re-write device retrieves a reproduction-target frame for the fast-forward reproduction and a parameter-calculation-target frame exclusively for calculation of the frame data parameters. The frames then are transferred to a RAM. A decoder determines the frame data in the RAM, calculates the parameter-calculation frame data, and decodes the reproduction frame data by use of the parameter obtained as above. The described operation prevents expending the reproduction frame data with an incorrect parameter so as to normally fast-forward reproduce the compressed data. Furthermore, the present can select a frame used in the fast forward reproduction according to a feature index so that a section subjected to the fast-forward reproduction can be easily grasped by the user.

Abstract: A search and display apparatus is formed compact in size and light in weight compared with the one heretofore. A display means, a bulk storage means and a key signal entering means are housed in a display operating unit which is provided a separate case from the driving unit 11 for reproducing the data stored in a disc storage medium, and when the two are connected to each other, the reproducing data read from the driving unit are transferred to the display operating unit, and is sequentially stored into the bulk storage means. And when carrying it around, the display operating unit is to be disconnected, and the reproduced data stored in the bulk storage means are displayed on the display means based on the operation of the key signal entering means. Therefore, the necessary data can be freely searched without carrying the thick and heavy driving unit, thus the convenience for use can be enhanced.

Abstract: A digital information reproducing apparatus in accordance with a prior art that uses a semiconductor memory to realize a memory means cannot reproduce digital data which has been encoded according to a compression coding form different from the one adopted by an incorporated decoding circuit. According to the present invention, a decoding program stored in a second semiconductor memory is selected according to a compression coding form adopted for digital data stored in a first semiconductor memory. The selected decoding program is used to decode the digital data by means of an arithmetic circuit. Thus, digital information can be reproduced irrespective of a compression coding form adopted for provided digital information.

Abstract: A magnetic shield apparatus includes a magnetic shield room, a tubular member, and a flange portion. The magnetic shield room has an opening to shield external magnetism. The tubular member is made of a magnetic shield material and attached to the opening to project from the magnetic shield room by a first predetermined length. The flange portion is made of a magnetic shield material and formed around a distal end portion of the tubular member to be spaced apart from it by a second predetermined length.

Abstract: The microbial electrode is constructed having a substrate(3) made of an insulating material, an electric conductor(2) which is fixed on the substrate and a membrane containing microorganism cells(1) which is fixed on the conductor. The microbial sensor(20) is constructed having the microbial electrode above described and a conductor(11) to act as a counter electrode fixed on the insulating material of the surface of the substrate of the electrode which is opposite to the surface where the membrane containing microorganism cells is fixed.

Abstract: An object of the present invention is to provide a novel prothrombin activator. The application of the activator to thrombin-related diseases is expected.Described is a prothrombin activator derived from snake venom, which is a calcium requiring type and comprises three polypeptide chains composed of one heavy chain having a molecular weight of about 62,000 or about 60,000 and two light chains having molecular weights of about 17,000 and about 14,000, respectively.

Abstract: An information processing apparatus forms an image on a recording medium by accessing image data stored in a hard disk device in the form of files, while using file-related information about the files in the hard disk device, by accessing a semiconductor memory device that holds the file-related information.

Abstract: A periodontal pocket cleaning device is provided which has a very excellent effect for the prevention of periodontal diseases, which is least liable to cause injury to the periodontal pocket, which can be used at any place without limiting the place of its use, which is able to obtain a stabilized atomized jet without being influenced by the height position of the handy probe, and which is available at a low cost. The periodontal cleaning device includes a handy probe provided with an air-jet ejection mechanism, an air pump for producing compressed air, and an air-feeding tube for feeding the compressed air from the air pump to the handy probe. The handy probe is provided with a liquid storage tank for storing liquid agent such as water or liquid chemicals therein. The jet-out pressure of the compressed air to be ejected from the nozzle of the handy probe is set in a range of from 0.05 to 0.08 kg/cm.sup.2. The jet-out quanity of the compressed air is set in a range of from 2 to 30 l/min.

Abstract: An improved heat exchanger for use in a gas compression/expansion apparatus. The heat exchanger comprises: a tube connected with a compression/expansion space of a compression/expansion cylinder of the apparatus; a central cylinder coaxially disposed in the tube such that a narrow gap for the working gas is formed only between the central cylinder and the tube. The heat exchanger may liberate heat from, or providing heat to, the compression/expansion cylinder through heat transfer between the working gas in the tube and an ambient medium surrounding said tube. The heat exchanger is capable to serve as a low/high temperature heat source for an external heat load.

Abstract: In an optical system comprising a light source section consisting of a semiconductor laser and a collimator lens, an objective lens for focusing a light beam on an optical disk, a beam splitter for separating part of the light beam reflected from the optical disk, a condenser lens, and a photosensor for detecting the separated light beam to produce a focusing and a tracking error signal, a plane parallel plate is provided between the light source section and the beam splitter. By rotating the plane parallel plate with an adjusting mechanism, the light beam undergoes a parallel shift, so that the intensity distribution of light being incident on the objective lens is varied and a tracking offset due to a deviation of the optical axis of the output light from the light source section can be compensated for. The plane parallel plate may be disposed between the beam splitter and the condenser lens.

Abstract: A screen communication method and system for communicating screen data between a plurality of interconnected terminal units each having a display part and an input part, wherein each time screen modifying data is input from the display part, each of the terminal units transmits a modifying right request to another terminal unit before transmitting the screen modifying data, and obtains a modifying right under such a condition that each terminal unit receives no screen modifying request from another terminal unit within a predetermined period of time after the transmission of the first modifying right request.

Abstract: The present invention is a method of producing an oligosaccharide of a higher polymerization degree by enzymatic hydrolyzing of a polysaccharide with a hydrolase capable of cleaving the bonds among sugars constituting the polysaccharide comprising step of making the polysaccharide coexist with the hydrolase in a mixture of water and a hydrophilic organic solvent such as ethanol.

Abstract: An optical head structure, employed in an optical device, in which light radiated from a predetermined light source is projected onto a predetermined recording medium through a light splitting member is disclosed. Part of the light is directed to the outside of the light splitting member and converged so as to be detected by a predetermined light detecting member. The light directed to the outside of the light splitting member is reflected at a predetermined angle by a predetermined light reflecting member. Thus, it becomes possible to make the whole volume of the optical device smaller. Also, the number of parts required in the optical head structure can be decreased.

Abstract: A reproducing apparatus for a disc in which data read out from a disc are retrieved, in which, with the use of sole CPU, a data retrieval related processing is executed as a main routine and a reproduction control processing for the disc is executed as a subroutine by timer interrupt to achieve reduction in the number of the CPUs.

Abstract: A network broadcast system having at least one local area communication network connecting apparatus which interconnects LANs and PBXs electrically connected thereto. The local area communication network connecting apparatus includes at least one LAN connecting unit, connected to a LAN for converting a LAN frame transmitted from the LAN to a cell including a VCI which identifies a desired destination of the cell, at least one PBX connecting unit, connected to a PBX for converting an audio signal from the PBX to a cell and a converting unit, connected to the LAN connecting unit, the PBX connecting unit and a plurality of output paths. The converting unit responds to a VCI in a cell transferred thereto, adds at least an output path number which identifies an output path connected between the converting unit and a desired destination of the cell and outputs the cell to the output path identified by the output path.

Abstract: A disc reproducing apparatus for an optical disc on which data is recorded. The reproducing apparatus reproduces data recorded on the disc as reproduced data, and, in response to a user input, performs data retrieval, a process in which the data to be reproduced from the disc is selected. The apparatus comprises a main body section and a display, attached to the main body section, for displaying reproduced data. The main body section includes an optical pickup that provides signals in response to the disc, a signal processing circuit that processes the signals from the optical pickup means to provide reproduced data, a feed motor that moves the optical pickup radially relative to the optical disc, and a feed motor control that controls the feed motor. The main body section also includes a device that rotationally drives the optical disc, and an input device that receives the user input. Finally, the main body section includes a control device that includes a single central processing unit.

Abstract: The optical disk apparatus of this invention is provided with a memory for memorizing a track offset signal corresponding to an angle of a galvanic mirror, or a photodetector having two pairs of photodetecting regions to detect different tracking error signals to each other, or two galvanic mirrors which are adjusted so as to prevent the track offset signal.