Abstract: An apparatus for practicing playing music on a musical instrument provides a stepped lesson comprised of a series of lesson steps about a subject music piece, each step providing practicing materials for a user to master for playing the subject music piece. The lesson steps are given to the user step by step. The apparatus stores a music-playing data set of a subject music piece for a reference and a music-playing data sets of the stepped lesson, and comprises a music-playing input device for the user to input music-playing manipulations. The apparatus judges, at each of the lesson steps, the achievements of the user in comparison with the reference music-playing data. The apparatus keeps a pass/fail score table for recording pass/fail judgments about the achievements of the user with respect to the respective lesson steps. The user can practice lesson steps selectively with reference to the pass/fail score table about his/her achievements.

Abstract: Chord to be performed is presented to a user. Chord is detected based on one or more notes performed by the user. When it is not detected that a chord has been duly established, one of the notes performed by the user is detected as a root note of a chord. Comparison is made between the chord presented to the user and the detected chord to make a determination as to whether at least the root note of the detected chord matches the root note of the presented chord. The user is informed of a result of the determination. Thus, not only when the user has accurately executed performance operation for all component notes of the presented chord but also when the user has executed performance operation for only the root note of the presented chord, a chord performance evaluation is made, determining that the user has accurately performed.

Abstract: An apparatus for practicing playing music on a musical instrument provides a stepped lesson comprised of a series of lesson steps about a subject music piece, each step providing practicing materials for a user to master for playing the subject music piece. The lesson steps are given to the user step by step. The apparatus stores a music-playing data set of a subject music piece for a reference and a music-playing data sets of the stepped lesson, and comprises a music-playing input device for the user to input music-playing manipulations. The apparatus judges, at each of the lesson steps, the achievements of the user in comparison with the reference music-playing data. The apparatus keeps a pass/fail score table for recording pass/fail judgments about the achievements of the user with respect to the respective lesson steps. The user can practice lesson steps selectively with reference to the pass/fail score table about his/her achievements.

Abstract: Chord to be performed is presented to a user. Chord is detected based on one or more notes performed by the user. When it is not detected that a chord has been duly established, one of the notes performed by the user is detected as a root note of a chord. Comparison is made between the chord presented to the user and the detected chord to make a determination as to whether at least the root note of the detected chord matches the root note of the presented chord. The user is informed of a result of the determination. Thus, not only when the user has accurately executed performance operation for all component notes of the presented chord but also when the user has executed performance operation for only the root note of the presented chord, a chord performance evaluation is made, determining that the user has accurately performed.

Abstract: A method for producing a polyoxyalkylene polyol which comprises subjecting propylene oxide and ethylene oxide to ring-opening addition polymerization with an initiator in the presence of a catalyst, wherein the polyoxyalkylene polyol is a polyoxyalkylene polyol obtained by subjecting propylene oxide to ring-opening addition polymerization with an initiator in the presence of a double metal cyanide complex catalyst to form an oxypropylene block chain, subjecting ethylene oxide and propylene oxide to ring-opening addition polymerization randomly to form an oxyalkylene random chain, changing the catalyst and subjecting ethylene oxide to ring-opening addition polymerization in the presence of an alkali metal catalyst to form an oxyethylene block chain, and the polyoxyalkylene polyol is a polyoxyalkylene polyol having a hydroxyl value of from 5 to 56 mgKOH/g, a proportion of an initiator residue of at most 25 mass %, a proportion of the oxypropylene block chain of from 5 to 50 mass %, a total oxyethylene group c

Abstract: A process for producing a flexible polyurethane foam satisfying low resilience, high vibration absorption and high durability, is presented. A mixture comprising from 95 to 50 mass % of a polyoxyalkylene polyol produced by means of an alkali metal catalyst and from 5 to 50 mass % of a polyoxyalkylene polyol produced by means of a double metal cyanide complex catalyst, is reacted with a polyisocyanate compound in the presence of a catalyst and a blowing agent, to produce a flexible polyurethane foam having a resonance frequency of at most 3.7 Hz, a resonance ratio of at most 3.5 and an impact resilience of at most 70%.

Abstract: A process for producing a double metal cyanide complex catalyst for ring opening polymerization of alkylene oxide, which comprises subjecting a substantially crystalline double metal cyanide compound to a contact treatment by heating at from 45 to 125° C. with an aqueous solution containing an organic ligand and a metal salt, and then separating the resulting solid from the obtained slurry.

Abstract: A method for producing a polyoxyalkylene polyol which comprises subjecting propylene oxide and ethylene oxide to ring-opening addition polymerization with an initiator in the presence of a catalyst,

Abstract: A process for producing a double metal cyanide complex catalyst for ring opening polymerization of alkylene oxide, which comprises subjecting a substantially crystalline double metal cyanide compound to a contact treatment by heating at from 45 to 125° C. with an aqueous solution containing an organic ligand and a metal salt, and then separating the resulting solid from the obtained slurry.

Abstract: A process for producing a flexible polyurethane foam satisfying low resilience, high vibration absorption and high durability, is presented. A mixture comprising from 95 to 50 mass % of a polyoxyalkylene polyol produced by means of an alkali metal catalyst and from 5 to 50 mass % of a polyoxyalkylene polyol produced by means of a double metal cyanide complex catalyst, is reacted with a polyisocyanate compound in the presence of a catalyst and a blowing agent, to produce a flexible polyurethane foam having a resonance frequency of at most 3.7 Hz, a resonance ratio of at most 3.5 and an impact resilience of at most 70%.

Abstract: A curable composition comprising a reactive silicon group-containing oxyalkylene polymer (A1) having at least one group of the formula 1 at its molecular terminal and satisfying the following (a) to (c), and a curing accelerator:

Abstract: A resilient polyurethane foam produced by using a polyether polyol produced by reacting alkylene oxides with a polyhydroxy compound having at least 2 hydroxyl groups as an initiator in the presence of the catalyst for alkylene oxide ring-opening polymerization of the present invention, which is excellent in foam physical properties, vibration characteristics and molding properties.

Abstract: The electrostatic information recording medium of the present invention has an electric charge retaining layer 11 stacked on at least an electrode layer 13, as shown in FIG. 1. The electric charge retaining layer is formed from either 1 a resin selected from among fluorocarbon resins, and an insulating organic substance having no photoconductivity, or 2 a fluorine-containing thermoplastic resin consisting of a repeating unit represented by formula (1): ##STR1## (where the content of the dioxonol component represented by the number m of repeating units is in the range of 20 mol % to 90 mol %)the fluorine-containing thermoplastic resin having a melt viscosity of 10.sup.2 to 10.sup.4 Pa.sec at a temperature which is 90.degree. C. to 110.degree. C. higher than its glass transition temperature.

Abstract: The electrostatic information recording medium of the present invention has an electric charge retaining layer 11 stacked on at least an electrode layer 13, as shown in FIG. 1. The electric charge retaining layer is formed from either 1 a resin selected from among fluorocarbon resins and polystyrene resins, and an insulating organic substance having no photoconductivity. The electrostatic information recording medium may be produced, as shown in FIG. 5, by stacking an insulating resin layer 10 on an electrode layer 13, stacking a photoconductive or electrically conductive fine particle layer 11 on the insulating resin layer 10, and further stacking an insulating resin layer 12 on the fine particle layer 11 to a thickness of 0.1 .mu.m to 1 .mu.m. If the insulating resin layers 10 and 12 are formed by coating using a fluorocarbon resin solution, the electrostatic information recording medium can be produced with excellent processability.

Abstract: The electrostatic information recording medium of the invention has on at least an electrode an information recording layer comprising a product obtained by contact of a polymer having a fluorine-containing aliphatic ring structure with fluorine gas, on which layer a latent image charge trap is retained. This electrostatic information recording medium enables electrostatic information such as an electrostatic latent image to be recorded in the form of a charge trap rather than an electrostatic charge, and so may be used as an electrostatic printing master by way of example.

Abstract: The electrostatic information recording medium of the present invention has an electric charge retaining layer 11 stacked on at least an electrode layer 13, as shown in FIG. 1 . The electric charge retaining layer is formed from either 1 resin selected from among fluorocarbon resins and polystyrene resins, and an insulating organic substance having no photoconductivity. The electrostatic information recording medium may be produced, as shown in FIG. 5 , by stacking an insulating resin layer 10 on an electrode layer 13, stacking a photoconductive or electrically conductive fine particle layer 11 on the insulating resin layer 10, and further stacking an insulating resin layer 12 on the fine particle layer 11 to a thickness of 0.1 .mu.m to 1 .mu.m. The electrostatic information recording medium is superior in electric charge retaining characteristics, particularly in the performance of retaining positive information electric charge, and also excellent in heat resistance and moisture resistance.

Abstract: A charge carrier medium 1 including an insulating layer 11 laminated on an electrically conductive layer 12 with an electrostatic latent image 2 recorded on the insulating layer 11 is brought into contact with water, etc., to resurrect the attenuated potential. Alternatively, the charge carrier medium 1 is previously immersed in water, etc., to deposit onto the surface thereof charges opposite in polarity to those of the electrostatic latent image 2 generated by charging, thereby attenuating the surface potential. This makes any external access to the image information impossible. In reading the image information, a PET film 5 or the like is brought into close contact with the surface of the charge carrier medium 1, and is then peeled apart from that surface to remove the charges of the opposite polarity and thereby resurrect the image information for reading.