摘要:
A communication management system is adapted for a chat system provided in a computer network including a plurality of client workstations and a server computer linked thereto. The communication management system includes a log file recognizing part which recognizes recognizing a log file produced at a predetermined channel of the chat system during a chat session between the plurality of client workstations and the server computer even when the client workstation of concern is not connected to the channel of the chat system. A storage part stores the log file recognized by the log file recognizing part. A log file output part transmits the log file, stored by the storage part, through the computer network to an external communication device provided outside the chat system, when a log file request transmitted by the external communication device is received by the log file output part.
摘要:
When actuation of an application program is received by a client, the client is connected with a chat server and participates in and registers at a channel, and attribute information, a number of times of statements or amount of statements in the registered channel is displayed, without a user's predetermined operation and a publicly known conversation process is executed. Thereafter, when designation of the displayed attribute information, number of times of statements or amount of statements is received, a channel where statements are possible is changed into a channel relating to the designation.
摘要:
The invention relates to a thermosetting coating composition for precoated steel sheets which are required to have high hardness, good workability and stain resistance, to a precoated steel sheet having a film of the coating composition, and to a method for producing such precoated steel sheets. The coating composition for precoated steel sheets of the invention consists essentially of a polyol and contains a specific compound and a curing agent composed of polyisocyanate compounds added thereto, in which the curing agent is a mixture composed of a blocked polyisocyanate compound as obtained by blocking one or more polyisocyanate compounds selected from polyisocyanates of the following group (a) and their derivatives, and a blocked polyisocyanate compound as obtained by blocking one or more polyisocyanate compounds selected from polyisocyanates of the following group (b) and their derivatives:(a) 4,4'-diphenylmethane diisocyanate, isophorone diisocyanate, tolylene diisocyanate, xylylene diisocyanate, naphthalene-1,5-diisocyanate;(b) hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, hydrogenated 4,4'-diphenylmethane diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate.The coating composition forms a coating film having good workability, high hardness and good stain resistance.
摘要:
In an image reading apparatus provided with a light source for illuminating an original, the light source includes a fluorescent lamp having a tube surface by means of which a part of a beam of light therefrom is condensed on the surface of the original by the optical action thereof, a line sensor for reading image information of the original and an optical device for causing image information of the original illuminated with the beam of light from the light source to be imaged on the line sensor.
摘要:
A client-server type network having at least two clients which execute the same kind of operation. The server and the clients are improved in order to realize addition or reduction in the number of clients. When the client is started, the fact that the client in under operation is recorded in the data base of the server. Since the addition of a client is automatically recorded in the server, the addition is easily facilitated. The server is provided with a client managing device for judging whether or not the client is under operation by polling. If the client is stopped due to a problem or the like, the fact is automatically recorded in the data base of the server. Therefore, it is also easy to eliminate the client from the data base of the server.
摘要:
An optical information recording/reproduction apparatus includes a radiation device for radiating a light beam onto an information recording medium, a converging device for converging the light beam reflected by the information recording medium, a first device for splitting the converged light beam into two light beams, a second device for guiding the two split light beams onto a single light-receiving surface, which can receive the two light beams, via optical paths having different optical path lengths, the second device guiding the two light beams, so that one of the two split light beams is projected onto the light-receiving surface at a position before the light beam passes a convergent point thereof, and the other light beam is projected onto the light-receiving surface at a position after the light beam passes a convergent point thereof, an integrated photodetector including at least two photodetection regions for receiving the light beams on the light-receiving surface, a size, in one direction, of each of the photodetection regions of the photodetector being set to be smaller than a beam spot size on the light-receiving surface in an in-focus state and device for detecting, focusing error signals from the light beams on the light-receiving surface, by the photodetection regions.
摘要:
A heat exchanger includes a first tank and a second tank, an inlet and an outlet each connected to either the first tank or the second tank, and a plurality of panel units provided between and connected to the first and second tanks. Each of the panel units has a plurality of tube portions formed as fluid paths and a plurality of plate portions connecting adjacent tube portions and having a thickness less than a thickness of the tube portions. The heat exchanger is lightweight, can be easily assembled and can have a high efficiency in heat exchange.
摘要:
An optical information recording/reproducing apparatus which can prevent an optical system from being impossible to use due to its contamination, and in which an optical system need not be cleaned in case that it is not contaminated.The apparatus includes a contamination detection device for detecting contamination of an optical system of the optical information recording/reproducing apparatus. The contamination detection device includes a light source, a first detector for monitoring an output of a light beam emitted from the light source, an optical system for focusing the light beam emitted from said light source on an information recording medium, a second detector for receiving the light beam emitted from said light source and passing through said optical system and a processing device for comparing outputs from said first and second detectors.
摘要:
A new aromatic polycarbonate is obtained from (1) 2,2-bis(4-hydroxy-3-isopropylphenyl)propane, (2) 2,2-bis(4-hydroxyphenyl)propane and 2,2-bis(4-hydroxy-3-isopropylphenyl) propane or (3) 4,4'-dihydroxy-2,2,2-triphenylethane and 2,2-bis(4-hydroxy-3-isopropylphenyl)propane through a carbonate linkage and is useful as a starting material for an optical disk.
摘要:
A plastic optical fiber comprising an aromatic polycarbonate copolymer having a photoelastic constant of 60 Brewsters (10.sup.-12 m.sup.2 /N) or less as a core component resin exhibits small birefringence.