Abstract: Provided is a method for producing a petroleum resin using a tube-type reactor, the method producing a petroleum resin that exhibits good properties as an adhesive component for a hot-melt adhesive which has a narrow molecular weight distribution and a high softening point, and which exhibits good adhesive capability and also has little insoluble matter. A method of producing a petroleum resin by using a raw material containing at least a cyclopentadiene-based component (A) and a styrene-indene-based aromatic component (B) so as to carry out a thermal polymerization reaction of the raw material, the method comprising: a first polymerization reaction step of thermally polymerizing the raw material using a loop reactor; and a second polymerization reaction step of thermally polymerizing a polymerization reaction product obtained in the first polymerization reaction step using a plug flow reactor.

Abstract: An image coding method includes: a predictive pixel generation step of generating a predictive value from at least one surrounding pixel located near a compression target pixel; a code conversion step of code-converting the pixel data to generate a Gray code; and quantizing bit change information (exclusive OR) between the generated Gray code and a Gray code of the predictive value to a quantization value, to compress the pixel data. This prevents significant image quality degradation, so that high image quality can be achieved.

Abstract: An image coding method includes: a predictive pixel generation step of generating a predictive value from at least one surrounding pixel located near a compression target pixel; a code conversion step of code-converting the pixel data to generate a Gray code; and quantizing bit change information (exclusive OR) between the generated Gray code and a Gray code of the predictive value to a quantization value, to compress the pixel data. This prevents significant image quality degradation, so that high image quality can be achieved.

Abstract: A cradle of the present invention includes a support portion and a holding portion that is formed on the support portion as a depression with a shape corresponding to part of a mouse. The holding portion of the cradle includes an inclined surface that is a flat surface over which a mouse can be slid and that has a predetermined angle with respect to a bottom surface of the support portion, and a guiding edge portion that is formed on at least a lower portion and a side portion of an outer edge of the inclined surface and that guides the mouse that is slid along the inclined surface to a holding position.

Abstract: A mobile device includes a vertically-oriented handheld housing and keys corresponding to keys of a horizontally-oriented keyboard of a personal computer divided into a plurality of groups, each group of keys being shifted in a vertical direction of the housing with respect to one another, to allow a mobile device to accommodate a key layout similar to the key layout of the computer keyboard.

Abstract: If the same instructions are continuously inputted over a predetermined number of times when a plurality of instructions on picture display are entered by a user and accumulated while display data recorded on a recording medium is read out, processed and displayed, the same continuous instruction is converted into other instructions.

Abstract: A mobile device includes a portrait-oriented handheld housing, and keys which are arranged in such a manner that keys mounted on a landscape-oriented keyboard of a personal computer are divided into a plurality of groups, each group of keys being shifted in a longitudinal direction of the housing with respect to one another. Therefore, the mobile device with a confined width can accommodate a key layout similar to the key layout of computer keyboard.