Bridgestone Corporation

Mitsubishi Denki Kabushiki Kaisha

University of California

Hitachi Building Systems Co., Ltd.

Nanshin Kiko Co., Ltd.

Atsushi Hotta

Itsuo Tanuma

Minoru Ishiharada

Hideo Sugiyama

Masato Sugimachi

Guillermo C Bazan

Masato Yoshikawa

Kazuo Naito

Edward J Kramer

Tatsuo Terahama

Torao Hashimoto

Glenn H Frederickson

Steve Diamanti

Shigeyuki Sato

Tokiji Tamaru

Vikram Khanna

Tomoharu Onishi

Masaki Nakano

Nobumichi Shigetomi

A method of preparing a polymer having a tapered block copolymer structure. The method comprises polymerizing a first olefin monomer and a different second olefin monomer in the presence of a catalyst supporting living or quasi-living polymerization. In certain embodiments, the catalyst comprises two neutral metal complexes. In preferred embodiments, a tapered block copolymer structure is formed by adding one monomer in a single batch at the start of the polymerization reaction, and adding a second monomer throughout the course of the reaction. The present invention also provides polymers having one or more tapered block copolymer sections, and compositions based on these polymers.

Block copolyolefins possessing a tapered structure

An audio signal encoding apparatus is provided which is capable of preventing deterioration in the objective characteristics of a signal to be encoded without using parameters from a psychoacoustic model generated based on human auditory characteristics or by replacing such parameters with those by which the signal can be effectively quantized in cases where the width of a frequency band in which frequency component such as a sine wave of the signal concerned exists is narrow. The audio signal encoding apparatus includes a psychoacoustic model section , an MDCT processing section and an iterative loop processing section . The psychoacoustic model section includes an FFT operation section , a block type determination section and an SMR operation section . The iterative loop processing section includes an allowable error amount calculation section , a bit amount/error amount control section , a normalization processing section , a quantization section and a Huffman encoding section . The apparatus further includes a multiplexer section for multiplexing a processing block type from the block type determination section , a scale factor from the bit amount/error amount control section , a Huffman code book number and a Huffman code from the Huffman encoding section , a sine wave discrimination section for discriminating whether or not the input signal is a sine wave, by using the FFT frequency spectrum calculated by the FFT operation section , and a switching element for switching between use and nonuse of an output value of the SMR operation section based on the result of sine wave discrimination in the sine wave discrimination section

Audio signal encoding apparatus

A light transmitting tube,, which can significantly reduce the loss of light at a bent portion, comprises a tubular cladding,and a solid core,made of material having reflection index higher than that of the material for the tubular cladding,. The cladding,has rigidity higher than the core,. The core,and the cladding,are not bonded to each other. As the light transmitting tube,is bent, an air layer,is appears between the core,and the cladding

Light transmitting tube

In each of oil-retaining sheets, an end edge and side edges of a recess are separated from each other. The side edges are formed into tongue portions covered by first anti-wear meshes which prevent loosing of the side edges, and these tongue portions are maintained in sliding contact with their corresponding side walls of a guide portion of a guide rail. The end edge is covered by a second anti-wear mesh which prevents loosing of the end edge, and the second anti-wear mesh is maintained in sliding contact with an end wall of the guide portion. A gap is also formed to maintain the tongue portions and the second anti-wear mesh out of contact with each other.

Guide rail lubricating device for elevator, and case and oil-retaining

A branched type light transmission system including a plurality of light transmission tubes each comprising a flexible cylindrical cladding and a transparent core filled in the cladding and which has a higher index of refraction than the cladding. The core is made of an elastically deformable solid substance, and the plurality of light transmission tubes are bundled together at the light-incident ends thereof with a binding member and thus applied with an external pressure to deform each light transmission tube in order to minimize the clearance between the light transmission tubes.

Branched type light transmission system

In an optical waveguide tube comprising a tubular cladding filled with a solid core having a higher refractive index than the cladding, a light transmissive window member is disposed in close contact with at least the end face of the core on a light incident side for protecting the core end face from thermal influence and contamination. Means disposed around the cladding and the window member for securing the window member to the cladding may be a tape wrapped around them or a heat shrinkable sleeve or a ferrule. Alternatively, a ferrule surrounding the outer periphery of the cladding at each end is fastened for securing the cladding to the core at each end for preventing the core from projecting out of the cladding. The ferrule may have a collar disposed in abutment with the core end face.

Optical waveguide tube

The invention relates to an optical waveguide tube comprising a tubular cladding filled with a solid core having a higher refractive index than the cladding. In one form, a resin material having a Tg of up to 50.degree. C. and a modulus of elasticity of up to 10.sup.9 dyne/cm.sup.2 is used as the core. In another form, a copolymer of acrylic acid, methacrylic acid or a lower alcohol ester thereof with a higher alkyl (meth)acrylate is used as the core, preferably in combination with a phosphate, aromatic carboxylate, aliphatic carboxylic acid, aliphatic carboxylate or glycol. In a third form, such an optical waveguide tube is prepared by filling a hollow tubular transparent cladding having opposite open ends with a liquid monomeric charge and causing the monomeric charge to polymerize while pressurizing the exposed surfaces of the monomeric charge inwardly from the opposite open ends along an axial direction of the cladding, thereby forming a core within the cladding.

Optical waveguide tube and method of making

Growing community of inventors

Tokyo, Japan

Atsushi Hotta