Abstract: Provided is a process for producing a cycloolefin resin composition, comprising a step of hydrogenating a resin composition. The resin composition before hydrogenation, which is used in the above step, includes 0.01 to 20 parts by weight of an unsaturated hydrocarbon compound having a boiling point of 50° C. or higher, for example, a monomer employed in polymerization, per 100 parts by weight of the resin composition.

Abstract: A recording/reproducing apparatus includes an encoding section, a decoding section, and a first judging section. The encoding section is configured to encode data that is to be recorded onto a recording medium into an LDPC (Low Density Parity Check) code. The decoding section is configured to decode the LDPC code read out from the recording medium. The judging section is configured to judge a block with a recording error based on one of a block error flag and an iterative decoding count output from the decoding section.

Abstract: Disclosed herein is a helical scan type magnetic tape reproduction apparatus, including: a helical scan type reproduction head capable of moving in the track widthwise direction by displacement of said actuator itself; target time decision means for measuring a period of time from a reference point of time with regard to each of a plurality of markers recorded in a dispersed relationship at predetermined positions on the tracks in advance to the marker by a predetermined number of times, averaging the measurement time periods of the markers and storing the average time periods; and tracking control means for measuring actual time periods from the reference time points with regard to the markers and performing updating control of a control voltage to be applied to said actuator for said reproduction head in accordance with time information of the differences between the target time periods and the actual time periods.

Abstract: A poly 4-methyl-1-pentene resin composition which includes a polymer containing 80% by mass or more of 4-methyl-1-pentene in which the resin composition has a melting point of 170 to 240° C. and a semicrystallization time of 70 to 220 seconds. Also provided are a release film having good releasibility, a mold for production of a sealed electronic element product having excellent heat resistance and releasibility and an LED mold, which are obtained by molding the resin composition.

Abstract: Provided is a resin composition suitable for an optical element in which the moldability, thermal resistance, mechanical strength, and low birefringence are not impaired, the deterioration is hardly generated although the laser light nearby the UV is used, change in the optical properties during the use are extremely small, particularly the light transmittance is maintained high, and a foreign substance is hardly deposited on a surface of the molded product such as an optical element, also provided is an optical element obtained by molding the resin composition, and an optical pickup device using the optical element. The thermoplastic resin composition contains the polymer having a specific structure and two kinds of specific optical stabilizers in a specific mass ratio among a hindered amine light stabilizer having the molecular weight of 400 to 5,000; the optical element is obtained by molding the thermoplastic resin composition; and the optical pickup device includes the optical element.

Abstract: A cyclic olefin resin composition which can be suitably used as a material for a substrate having low permittivity, low dielectric tangent, low water absorbability, excellent heat resistance, and the like, and a substrate obtained from the resin composition are provided. In particular, there is provided a novel cyclic olefin resin composition that can be suitably used as a material for a substrate for high frequency circuit dealing with high frequency signal transmission. The cyclic olefin resin composition comprises (A) 5 to 95 parts by weight of a cyclic olefin polymer having a glass transition temperature of 60 to 200° C. and (B) 5 to 95 parts by weight of a flexible copolymer, prepared by polymerizing at least two monomers selected from the group consisting of an olefin compound, a diene compound and an aromatic vinyl hydrocarbon compound, and having a glass transition temperature of 0° C. or below.

Abstract: A thermoplastic resin having a glass transition temperature of 130° C. or more, a saturated water absorption ratio is 0.1 mass % or less, and a stress-optical coefficient CR that satisfies |CR|?3×10?10Pa?1. The resin can be obtained by a random additional polymerization of ethylene and tetracyclo[4.4.0.12,5.17,10]-3-dodecene. A molded product of present invention comprises of the thermoplastic resin. The thermoplastic resin can provide a high heat resistant molded product which is small in property changes caused by water absorption and has an excellent optical property.

Abstract: Disclosed herein is a helical scan type magnetic tape reproduction apparatus, including: a helical scan type reproduction head capable of moving in the track widthwise direction by displacement of said actuator itself; target time decision means for measuring a period of time from a reference point of time with regard to each of a plurality of markers recorded in a dispersed relationship at predetermined positions on the tracks in advance to the marker by a predetermined number of times, averaging the measurement time periods of the markers and storing the average time periods; and tracking control means for measuring actual time periods from the reference time points with regard to the markers and performing updating control of a control voltage to be applied to said actuator for said reproduction head in accordance with time information of the differences between the target time periods and the actual time periods.

Abstract: A film that has high rigidity and high heat resistance and good releasability from a roughened copper foil surface, which is subjected to surface oxidization or etching treatment with acid, such as a black oxidized copper foil surface and that is suitable as a release film for producing an MLB; and a process for producing the same. A drawn film having a layer (A) which comprises a copolymer that is made from 4-methyl-1-pentene and ethylene or an ?-olefin, except 4-methyl-1-pentene, having 3 to 20 carbon atoms and that comprises 80% or more by mole of 4-methyl-1-pentene, the thermal coefficient of contraction of the film being 20% or more in the film-drawn direction, or the peel area of the film being 50% or more when the film, together with a copper foil surface subjected to roughening treatment, is subjected to heating and pressing treatment. This film is suitable for producing an MLB and has good releasability from the roughened copper foil surface, for example, a black oxidized copper foil surface.

Abstract: A helical-scan-type magnetic tape recording and reproducing apparatus includes: a helical-scan-type recording head that is movable, while being attached to a distal end of an actuator, in a track width direction by displacement of the actuator itself to sequentially scan a magnetic tape; a helical-scan-type reproducing head that is movable, while being attached to a distal end of an actuator, in the track width direction by displacement of the actuator itself to sequentially scan a track on the magnetic tape recorded by the recording head; an error rate profile forming mechanism forming, by wobbling the reproducing head at each of plural points on the track, error rate profiles at the plural points; and a reproducing-head moving mechanism moving the reproducing head at the plural points, by finding a point with the best error rate from each error rate profile at the plural points from the error rate profile forming mechanism.

Abstract: Provided is a shaped article for clean rooms comprising a resin composition prepared by melt-kneading 100 parts by weight of a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C., from 1 to 150 parts by weight of a flexible copolymer (B) prepared by polymerizing at least two monomers selected from a group consisting of olefins, dienes and aromatic vinyl-hydrocarbons, and having a glass transition temperature of 0° C. or lower, from 0.001 to 1 part by weight of a radical initiator (C), and from 0 to 1 part by weight of a polyfunctional compound (D) having at least two radical-polymerizable functional groups in the molecule. The shaped article for clean rooms has good chemical resistance, heat resistance and dimensional accuracy, it is inhibited from releasing a volatile component around it, and it has good abrasion resistance and is inhibited from producing particles.

Abstract: A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to 50% by weight of a constituent unit derived from at least one olefin selected from olefins having 2 to 20 carbon atoms except 4-methyl-1-pentene, and having the following properties: i) the diad isotacticity is 70% or greater, ii) the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5, and iii) the intrinsic viscosity [?] is 0.5 (dl/g) or greater.

Abstract: A decoder circuit includes a first delay means for delaying unit data read out from a dictionary, a selecting means for selecting data and a second delay means for delaying data selected by the selecting means, wherein delayed data from the second selecting means is written again in the dictionary, the selecting means is supplied with delayed data from the first delay means and delayed data from the second delay means and the selecting means selects delayed data from the second delay means if a read address and a write address of the dictionary fall within a range of a predetermined distance corresponding to delay amounts of the first and second delay means and the selecting means selects delayed data from the first delay means in other cases.

Abstract: Provided is a method for producing a resin composition by melt-kneading a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C. and a flexible polymer (B) having a glass transition temperature of 0° C. or lower, wherein a part of the cyclic olefin polymer (A) is previously melt-kneaded with the flexible polymer (B) and a radical initiator (C) and then the remaining cyclic olefin polymer (A) is added thereto and melt-kneaded. The cyclic olefin polymer (A) is divided into two portions and added separately at two times, and accordingly, the mixture having a crosslinked structure may be diluted with the cyclic olefin polymer (A) not having a crosslinked structure, and the increase in the melt viscosity of the resin composition may be thereby prevented. A composition having good abrasion resistance and good melt shapability can be obtained.

Abstract: A character string retrieving circuit includes a delay circuit (10) for delaying a match/no match signal created in each clock period to indicate whether or not a character matched with a retrieval target exists in a dictionary by one clock period, creating circuits (2(i), 3(i), 5(i) and 6(i)) for creating in advance signals of two kinds of a signal (ps1[i]) to assume that a character matched with a retrieval target exists in a dictionary in the clock period and a signal (ps0[i]) to assume that a character matched with a retrieval target does not exist in a dictionary in the clock period as signals to predict retrieved results in a certain clock period later and a selecting circuit (4)(i) for selecting a signal with a correct assumption from the signals of 2 kinds in accordance with the match/no match signal delayed by the delay circuit (10), wherein a signal selected by the selecting circuit (4)(i) is used in the next clock period.

Abstract: A decoder circuit includes a first delay means for delaying unit data read out from a dictionary, a selecting means for selecting data and a second delay means for delaying data selected by the selecting means, wherein delayed data from the second selecting means is written again in the dictionary, the selecting means is supplied with delayed data from the first delay means and delayed data from the second delay means and the selecting means selects delayed data from the second delay means if a read address and a write address of the dictionary fall within a range of a predetermined distance corresponding to delay amounts of the first and second delay means and the selecting means selects delayed data from the first delay means in other cases.

Abstract: A character string retrieving circuit includes a delay circuit (10) for delaying a match/no match signal created in each clock period to indicate whether or not a character matched with a retrieval target exists in a dictionary by one clock period, creating circuits (2 (i), 3 (i), 5 (i) and 6 (i)) for creating in advance signals of two kinds of a signal (ps1 [i]) to assume that a character matched with a retrieval target exists in a dictionary in the clock period and a signal (ps0 [i]) to assume that a character matched with a retrieval target does not exist in a dictionary in the clock period as signals to predict retrieved results in a certain clock period later and a selecting circuit (4) (i) for selecting a signal with a correct assumption from the signals of 2 kinds in accordance with the match/no match signal delayed by the delay circuit (10), wherein a signal selected by the selecting circuit (4) (i) is used in the next clock period.

Abstract: A film that has high rigidity and high heat resistance and good releasability from a roughened copper foil surface, which is subjected to surface oxidization or etching treatment with acid, such as a black oxidized copper foil surface and that is suitable as a release film for producing an MLB; and a process for producing the same. A drawn film having a layer (A) which comprises a copolymer that is made from 4-methyl-1-pentene and ethylene or an ?-olefin, except 4-methyl-1-pentene, having 3 to 20 carbon atoms and that comprises 80% or more by mole of 4-methyl-1-pentene, the thermal coefficient of contraction of the film being 20% or more in the film-drawn direction, or the peel area of the film being 50% or more when the film, together with a copper foil surface subjected to roughening treatment, is subjected to heating and pressing treatment. This film is suitable for producing an MLB and has good releasability from the roughened copper foil surface, for example, a black oxidized copper foil surface.

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. The molded article comprises as the main components an ionomer (A), which is a metal salt of a copolymer containing an &agr;-olefin unit and an unsaturated carboxylic acid unit, and a resin (B) having an alicyclic structure in its molecule. A preferred embodiment is a molded article composed of a composition comprising the ionomer (A) and the resin (B), and a still preferred embodiment is a laminate comprising a layer containing the ionomer (A) having laminated thereon a layer containing the resin (B). The invention further provides a composition comprising the ionomer (A) and the resin (B), which enables to produce the molded article.