摘要:
An optical disc recording apparatus for recording information signals on an optical disc having an optical recording medium with a larger than normal thermal time constant, such as an organic dyestuff base material, by irradiating the disc with a recording light modulated by signals produced by eight/fourteen modulation of information signals, is disclosed. The apparatus includes a recording pulse forming unit for forming recording pulses from the eight/fourteen modulated signals, which recording pulses are of pulse widths shorter than the eight/fourteen modulated signals by a pulse width corresponding to the elongation from the regular length of a pit formed on the recording medium on the basis of the eight/fourteen modulated signals, and an optical head supplied with the recording pulses formed by the pulse forming unit for producing the light which has been pulse width modulated by the recording pulses.
摘要:
An apparatus for use with a compact disc for writing and reproducing data into an arbitrary sector or rewriting data of an arbitrary sector by allowing the selection of an interleave process similar to that in a music type compact disc or an interleave process of a length corresponding to one recording unit (sector) to thereby make possible sector-completion type encoding and decoding.
摘要:
Disclosed are a catalyst filter characterized in that catalyst particles which are made of titanium oxide and vanadium oxide or titanium oxide, vanadium oxide and tungsten oxide and whose diameters are between 0.01 and 1 .mu.m are carried by a filter made by weaving monofilaments of a glass fiber and/or of a catalytic fiber;a method for manufacturing thereof; anda comprehensive method for treating a combustion exhaust gas characterized in that an alkaline powder or ammonia or its precursor is supplied to a flow of a combustion exhaust gas containing toxic substances such as dust, acidic gases and nitrogen oxides, and the flow of a combustion exhaust gas is let pass through a filter carrying a catalyst for denitrating the above combustion exhaust gas.
摘要:
A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon an under magnetic layer and an upper magnetic layer in that order, wherein the thickness of the upper magnetic layer is less than 0.5 .mu.m and abrasive agents, which have a Mohs' hardness of 6 or more and have an average particle diameter of 0.5 .mu.m or less, are contained in the upper magnetic layer. And a method for preparing a magnetic recording medium which comprises coating a coating composition for an under magnetic layer on a running non-magnetic support, and successively coating thereon a coating composition for an upper magnetic layer containing abrasive agents, which have a Mohs' hardness of 6 or more and an average particle diameter of 0.5 .mu.m or less, in a dry thickness of less than 0.5 .mu.m while the under magnetic layer is wet.
摘要:
An optical information recording medium having at least a transparent substrate and a recording layer and capable of recording an information by irradiating the recording layer with laser beams from the transparent substrate side, wherein a protective film having hygroscopic property is formed on a light incident surface of the transparent substrate so that it can be stripped therefrom.
摘要:
A refrigerating apparatus is conventionally provided with an electric which is fed with an electric current to effect heating and defrosting operations, a defrosting control device including a defrosting timer and an evaporator outlet refrigerant temperature detector for controlling the electric current fed to the electric heater, and an overheating preventing temperature detector for preventing the occurrence of abnormal overheating by the electric heater. The refrigerating apparatus of the present invention can regularly effect defrosting even if any anomaly should arise in the evaporator outlet refrigerant temperature detector. Specifically, the overheating preventing temperature detector is connected to the defrosting control device, and a detection temperature signal from either the evaporator outlet refrigerant temperature detector of the overheating preventing temperature detector is used to commence and terminate defrosting.
摘要:
A known refrigerating system for a container is improved to include container wrong or abnormal condition diagnostic facilities. Such additional facilities include a container inside temperature detector, a container outside temperature detector, a control responsive to a wrong condition diagnosis instruction for operating an evaporator fan and an electric heater of the refrigerating system, and a wrong condition diagnostic device for diagnosing whether or not a wrong condition of the container is present on the basis of the temperatures detected by the respective temperature detectors after a predetermined period of operation of the evaporator fan and the electric heater. If the temperature detected by the container inside temperature detector has risen to a predetermined temperature or higher in relation to the temperature detected by the container outside temperature detector, the wrong condition diagnostic device diagnoses that the container is normal, but if the temperature has not risen to the predetermined temperature, the container is diagnosed to be abnormal.
摘要:
A magnetic recording medium is described, comprising a nonmagnetic support having provided thereon a first magnetic layer and a second magnetic layer in this order, each containing ferromagnetic particles, and the first and second magnetic layers each comprising at least one polyurethane resin as a binder, where the number average molecular weight of the at least one polyurethane resin contained in the first magnetic layer is 4/5 or less of that of the at least one polyurethane resin contained in the second magnetic layer.
摘要:
A disk device which reproduces at least a disk (1) in which a servo signal region (3) in which a pit for servo and the like are formed and a data and address signal region (4) on which data and address are written are alternatingly provided along the circumferential direction of the disk (1), and in which signals are recorded depending upon two or more kinds of physical changes on the data and address signal regions (4) among the servo signal regions (3). A signal recorded depending upon one physical change is switched into a signal recorded depending upon another physical change in the servo signal region (3) or in a no-signal recording region (5c). Therefore, margin is provided for the operation of switching the signals of various recording types, and stable operation can be maintained even when the data are transferred at higher speeds.
摘要:
In a method for transmitting interleaved data, when the respective data blocks to be transmitted are interleaved and augmented by the error correcting parity codes before being transmitted on the transmission channel, a prescribed number of dummy data are provided between the respective data blocks so that the data block and the neighboring data blocks are not in the interleaving relation. In this matter, data addition, correction and substitution can be made easily for each data block or a group of blocks without influencing the error correction parity codes of the remaining block data.