Abstract: In a digital data storage system providing two or more levels of interleaved Reed-Solomon error correction coding together with a track checksum, the track checksum is calculated according to an algorithm which has no correlation with the Reed-Solomon codeword generation rules. This allows miscorrections at the C2 correction level to be determined reliably thereby enhancing the correction rate. Also disclosed is a system which uses the enhanced ability to identify C2 miscorrections, to mark C2 miscorrections to the third level of error correction thereby allowing double error correct at the third level.

Abstract: The present invention provides a data recording method a data recording and/or reproducing apparatus for recording data transmitted from a computer to a magnetic tape. In case a recording head fails to write data (data ID=582) of fragment ID=5 to a track (track 7), then, the data is rewritten to the first fragment (ID=0) of a next track (track 8). Thus, the data can be rewritten not on the track basis but on the fragment basis, which can reduce loss of tape capacity significantly.

Abstract: The invention provides a molded article having excellent impact, adhesive and printing properties. The invention also provides a molded article which has a low natural shrinkage percentage, a high shrinkage percentage in heating and a low density and is thus excellent in solvent resistance and hygiene.

Abstract: Cycloolefin resin pellets of the present invention comprises a cycloolefin resin pellet and a powdery coating material and/or a liquid coating material, the melting point or the glass transition point of the coating material being 200° C. or lower, and the coating material being adhered onto the surface of the cycloolefin resin pellets, so that the molded product thereof is excellent in transparency.

Abstract: The present invention provides a multi-layer laminate consisting essentially of:(A) a layer formed from an ethylene/cycloolefin random copolymer which is a copolymer of ethylene and a cycloolefin represented by a specific formula (e.g., tetracyclododecene), or a layer formed from a cycloolefin resin which is a graft modified product of the ethylene/cycloolefin random copolymer, or a layer formed from a cycloolefin resin composition comprising the cycloolefin resin and a polyolefin, and(B) a barrier layer consisting essentially of ethylene/vinyl alcohol copolymer, polyvinylidene chloride, or polyacrylonitrile, with the barrier layer having an oxygen permeability, as measured at 23.degree. C. and RH of 0%, of not more than 10 cc(STP).mm/m.sup.2.24 hr.atm; said multi-layer laminate having a moisture permeability of not more than 0.2 g.mm/m.sup.2.24 hr.atm and an oxygen permeability of not more than 5 cc(STP).mm/m.sup.2.24 hr.atm. This multi-layer laminate has excellent gas-barrier properties and high rigidity.

Abstract: A recording apparatus provided on, for example, a digital audio tape recorder or on a data storage device for correctly and reliably recording data. An ECC unit 23 appends the parity for error correction to recording data and transmits the resulting data to recording heads Hw1, Hw2, while recording the parity in a RAM 61. The recording data and the parity are reproduced from a magnetic tape 32 by magnetic heads Hr1, Hr2 and supplied to a subcode separation unit 45. A syndrome detection unit 62 detects the number of error corrections performed by parity by an error correction unit 46. A system controller 63 compares the number of times of error corrections to a threshold value and compares the parity read out from the RAM 61 to the parity from the sub-code separation unit 45 in order to detect if the recording data has been recorded correctly. If the recording data has not been recorded correctly, the system controller controls a recording/reproducing unit 30 for re-recording the same recording data.

Abstract: A data reproducing apparatus in which the identification information recorded in multiplicity on a recording track can be reliably reproduced assuring stable data reproduction including a decoder 61 to decode the area IDs supplied from an 8/10 demodulation circuit 43 and to supply each decoded area ID to counters C0 to C15, a system controller 70 to find the number of times of occurrences of coincidences of the area IDs of areas other than the end of data (EOD) area and, based on the frequency of detection of the occurrences of the area IDs by the counters C0 to C15, detects the area IDs of the (EOD) area. Finally, the system controller 70 controls the running of a magnetic tape 31 based on the detected area IDs.

Abstract: The processing material's shape data is obtained by measuring the three-dimensional shape of the processing material W by the three-dimensional measuring device 45, the machine's shape data defining the three-dimensional shape of the machine side including the main shaft head provided with the processing tool and the tool holder attached thereto is obtained, and whether the coordinate position of said processing material given by said processing material's shape data is in the space to be occupied by the machine given by said machine's shape data or not is determined at the relative movement position between the main shaft head (43) and the work table (35) by the execution of the processing program by the arithmetic processing by means of an arithmetic processing means, and when the coordinate position of the processing material W is in the space to be occupied by the machine, it is determined that the processing material W and the machine interfere with each other.

Abstract: A polyolefin multilayer laminate in which a first layer (A) made of a cycloolefin-based resin, such as an ethylene/cycloolefin random copolymer resulting from copolymerization of ethylene and a cycloolefin represented by the formula (1) given below, or a cycloolefin-based resin blend and a second layer (B) made of an olefin (co)polymer or a composition containing it are laminated. This laminate can be used as a packaging material which is superior in the interlayer adhesion, shapability, moistureproof property, transparency, flexibility, easiness of hand-cutting, heat-sealability and dead-hold property. Formula (1) comprises ##STR1## in which n and q are 0 or 1, m is 0 or any positive integer, R.sup.1 -R.sup.18 and R.sup.a and R.sup.b denote each H, a halogen atom or a hydrocarbon group, wherein R.sup.15 -R.sup.18 may form, by combining with each other, a monocyclic or polycyclic ring, which may have double bond(s), and wherein R.sup.15 -R.sup.16 may have terminal-located alkylidene group.

Abstract: A process for preparation of modified polyolefin particles which comprises contacting and reacting(A) 100 wt. parts of polyolefin particles with(B) 0.01 to 50 wt. parts of at least one ethylenic unsaturated compound selected from the group consisting of carboxyl group-containing ethylenic unsaturated compounds or their carboxylic anhydrides or their carboxylic acid derivatives, hydroxyl group-containing ethylenic unsaturated compounds, amino-group-containing ethylenic unsaturated compounds, and glycidyl group-containing ethylenic unsaturated compounds,in the presence of(C) more than 10 wt. parts to not more than 50 wt. parts of a medium of a liquid state at ordinary temperature whose solubility in water at 20.degree. C. is 0.5 wt. % or less and which is capable of swelling the polyolefin, and(D) 0.01 to 10 wt. parts of a radical initiator; andmodified polyolefin particles prepared by the aforesaid process.

Abstract: A polyolefin resin composition comprising (A) a polyolefin resin, (B) a graft-modified .alpha.-olefin copolymer grafted with an unsaturated carboxylic acid and its derivative, and (C) an amino group-containing compound, (D) said polyolefin resin composition containing a crosslinked structure between the amino group-containing compound (C) and the graft-modified .alpha.-olefin copolymer (B), and containing, based on 100 parts by weight of the polyolefin resin (A) and the graft-modified .alpha.-olefin copolymer (B) in total, 1 to 99 parts by weight of each of the polyolefin resin (A) and the graft-modified .alpha.-olefin copolymer (B) and 0.01 to 10 parts by weight of the amino group-containing compound (C). The polyolefin resin composition gives a crosslinked molded article having impact resistance at ordinary temperature and a low temperature.

Abstract: Fixed radio equipment serving as a base station includes a transmitter, a plurality of antennas, and a selective control circuit. The antennas are spaced apart from each other by a distance which minimizes a correlation of interferential fading. The transmitter modulates a carrier by identical signals to be transmitted during periods associated in number with the antennas and feeds the resulting bursts of the carrier time-serially to a selective control circuit. The selective control circuit delivers one of the successive bursts of the carrier fed from the transmitter to one of the antennas and then delivers another burst following the above-mentioned burst to another one of the antennas. Mobile radio equipment or station has a single antenna for receiving the identical signals transmitted time-serially from the base station. The mobile station selects and outputs either one of the received signals which has higher quality than the other.

Abstract: An epoxy resin composition comprising:(A) 1 to 40 parts by weight of a modified low molecular weight polyolefin obtained by graft copolymerizing at least one graft monomer selected from the group consisting of:(i) at least one unsaturated carboxylic acid derivative selected from the group consisting of unsaturated carboxylic acids and anhydrides thereof and esters thereof,(ii) at least one aromatic vinyl compound, and(iii) at least one nitrile compound, onto a low molecular weight polyolefin having an inherent viscosity [.eta.] of 0.01 dl/g to 1.0 dl/g, as measured in decalin at a temperature of 135.degree. C.,(B) 99 to 60 parts by weight of an epoxy resin (the total amount of (A) and (B) is 100 parts by weight),(C) a hardener for epoxy resin, and optionally(D) 0.01 to 20 parts by weight of a monoamine compound.