Abstract: A styrene resin having a syndiotactic structure, with an endothermic amount in a range of 175 to 260° C. of less than 30% based on the total endothermic amount, and a styrene resin composition containing 50 to 95% by mass of a thermoplastic resin composition and 5 to 50% by mass of a glass filler, the thermoplastic resin composition containing 100 parts by mass containing 80 to 100% by mass of a styrene resin having a syndiotactic structure and 0 to 20% by mass of a rubbery elastic material, 0.2 to 2.0 parts by mass of at least one kind of an antioxidant selected from a phenol-based antioxidant and a sulfur antioxidant, 1.5 to 5.0 parts by mass of at least one kind of a compound selected from a polyphenylene ether or a modified polyphenylene ether, and at least one kind selected from a nucleating agent or a release agent.

Abstract: A styrene resin having a syndiotactic structure, with an endothermic amount in a range of 175 to 260° C. of less than 30% based on the total endothermic amount, and a styrene resin composition containing 50 to 95% by mass of a thermoplastic resin composition and 5 to 50% by mass of a glass filler, the thermoplastic resin composition containing 100 parts by mass containing 80 to 100% by mass of a styrene resin having a syndiotactic structure and 0 to 20% by mass of a rubbery elastic material, 0.2 to 2.0 parts by mass of at least one kind of an antioxidant selected from a phenol-based antioxidant and a sulfur antioxidant, 1.5 to 5.0 parts by mass of at least one kind of a compound selected from a polyphenylene ether or a modified polyphenylene ether, and at least one kind selected from a nucleating agent or a release agent.

Abstract: To provide a method for producing a styrene resin having a syndiotactic structure, including performing addition polymerization of one or more of a vinyl aromatic monomer in the presence of a catalyst containing a half metallocene transition metal compound (A) having at least one kind selected from metals of groups 3 to 5 of the periodic table and lanthanoid transition metals as a central metal, a compound (B) represented by the general formula (1), and a compound (C) selected from at least one kind of an oxygen-containing compound (c1) and a compound (c2) capable of forming an ionic complex through reaction with a transition metal compound, the styrene resin produced having a transition metal content derived from the half metallocene transition metal compound (A) of 1.5 to 12 ppm by mass.

Abstract: An indexable cutting tool in which cutting ability can be ensured while suppressing the occurrence of chatter vibration. In outer circumferential blades provided on a tool main body, the axial rake angles are all set to the same angle, and so are the radial rake angles. With this configuration, the cutting ability of an indexable cutting tool can be ensured. Furthermore, the disposing intervals, in the circumferential direction of the tool main body, of the plurality of outer circumferential blades that are provided in, at least, a first groove of a plurality of groove are set to unequal values. With this configuration, it is possible to make the intervals at which the outer circumferential blades adjoining in the axis direction contact a workpiece unequal, suppressing resonance of periodic vibration occurring in cutting and, thus, suppressing the occurrence of chatter vibration.

Abstract: To provide a method for producing a styrene resin having a syndiotactic structure, including performing addition polymerization of one or more of a vinyl aromatic monomer in the presence of a catalyst containing a half metallocene transition metal compound (A) having at least one kind selected from metals of groups 3 to 5 of the periodic table and lanthanoid transition metals as a central metal, a compound (B) represented by the general formula (1), and a compound (C) selected from at least one kind of an oxygen-containing compound (c1) and a compound (c2) capable of forming an ionic complex through reaction with a transition metal compound, the styrene resin produced having a transition metal content derived from the half metallocene transition metal compound (A) of 1.5 to 12 ppm by mass.

Abstract: An indexable cutting tool in which cutting ability can be ensured while suppressing the occurrence of chatter vibration. In outer circumferential blades provided on a tool main body, the axial rake angles are all set to the same angle, and so are the radial rake angles. With this configuration, the cutting ability of an indexable cutting tool can be ensured. Furthermore, the disposing intervals, in the circumferential direction of the tool main body, of the plurality of outer circumferential blades that are provided in, at least, a first groove of a plurality of groove are set to unequal values. With this configuration, it is possible to make the intervals at which the outer circumferential blades adjoining in the axis direction contact a workpiece unequal, suppressing resonance of periodic vibration occurring in cutting and, thus, suppressing the occurrence of chatter vibration.

Abstract: A semiconductor device includes an input/output circuit to which a signal is input or from which a signal is output; a first terminal connected to a power line of the input/output circuit; a second terminal connected to the power line; a resistance element connected between the second terminal and the power line; and a first capacitance element connected between the second terminal and a ground terminal. The semiconductor device can suppress a resonance phenomena and Volt age variation caused by impedance of the power line.

Abstract: According to one embodiment, a semiconductor device includes an input/output circuit to which a signal is input or from which a signal is output; a first terminal connected to a power line of the input/output circuit; a second terminal connected to the power line; a resistance element connected between the second terminal and the power line; and a first capacitance element connected between the second terminal and a ground terminal.

Abstract: According to one embodiment, a first impedance adjustment circuit of a driver circuit includes a first resistor having an end connected to a first signal node. The first impedance adjustment circuit includes a first MOS transistor having an end connected to the other end of the first resistor. The first impedance adjustment circuit includes a second resistor having an end connected to the first signal node. The first impedance adjustment circuit includes a second MOS transistor having an end connected to the other end of the second resistor. The first impedance adjustment circuit includes a third resistor having an end connected to the other end of the first MOS transistor and the other end of the second MOS transistor, and the other end connected to the first output pad.

Abstract: A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip.

Abstract: According to an embodiment, a communication system includes a transmitting electrode, a first transmission line, a transmission circuit, a receiving electrode, a second transmission line and a reception circuit. The first transmission line includes one end connected to the transmitting electrode. The transmission circuit is connected to an other end of the first transmission line and configured to transmit a transmission signal. The receiving electrode is capacitively coupled to the transmitting electrode. The second transmission line includes one end connected to the receiving electrode. The reception circuit is connected to an other end of the second transmission line and configured to receive a reception signal via the receiving electrode and the second transmission line. Characteristic impedances of the first transmission line and the second transmission line are greater than an output impedance of the transmission circuit.

Abstract: According to an embodiment, a communication system includes a transmitting electrode, a first transmission line, a transmission circuit, a receiving electrode, a second transmission line and a reception circuit. The first transmission line includes one end connected to the transmitting electrode. The transmission circuit is connected to an other end of the first transmission line and configured to transmit a transmission signal. The receiving electrode is capacitively coupled to the transmitting electrode. The second transmission line includes one end connected to the receiving electrode. The reception circuit is connected to an other end of the second transmission line and configured to receive a reception signal via the receiving electrode and the second transmission line. Characteristic impedances of the first transmission line and the second transmission line are greater than an output impedance of the transmission circuit.

Abstract: According to one embodiment, a first impedance adjustment circuit of a driver circuit includes a first resistor having an end connected to a first signal node. The first impedance adjustment circuit includes a first MOS transistor having an end connected to the other end of the first resistor. The first impedance adjustment circuit includes a second resistor having an end connected to the first signal node. The first impedance adjustment circuit includes a second MOS transistor having an end connected to the other end of the second resistor. The first impedance adjustment circuit includes a third resistor having an end connected to the other end of the first MOS transistor and the other end of the second MOS transistor, and the other end connected to the first output pad.

Abstract: A throw-away rotating tool includes plural protrusions formed in a part of an outer peripheral wall of a projecting coupling portion. Since the twist angle and a twist direction of the protrusions are set in such a way that with relative rotation when coupling the projecting coupling portion and erected portions together, due to the reaction force received by the protrusions from inner peripheral walls, the projecting coupling portion is pulled to the rear and side of the erected portions and the projecting coupling portion is stably held between the erected portions. Since the number of portions that require stringent dimension control and high machining accuracy can be reduced, productivity can be improved.

Abstract: A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip.

Abstract: A throw-away rotating tool improves workability of detaching a throw-away tip and prevents from damaging a body. In the throw-away tool, a convex connection for the throw-away tip has protrusions, each of the protrusion includes a sliding contact portion detachably fitted into the inner peripheral groove recessed in the inner peripheral wall of a body. The protrusion has a first tilt portion continuous to the sliding contact portion. In detaching the throw-away tip from the body, the first tilt portion rotates ahead of the sliding contact portion, and a standing portion is elastically deformed due to a wedge effect of the first tilt portion. As a result, the protrusion can be gently removed from the inner peripheral groove.

Abstract: A differential output circuit is controlled according to its mode of operation. While in the first mode, the differential output circuit controls a current flow through a variable current source according to an impedance of the variable current source, and while in the second mode, the differential output circuit compares a voltage at a monitored node and a reference voltage and controls the current flow through the variable current source to make the voltage at the monitored node to be equal to the reference voltage.

Abstract: A differential output circuit is controlled according to its mode of operation. While in the first mode, the differential output circuit controls a current flow through a variable current source according to an impedance of the variable current source, and while in the second mode, the differential output circuit compares a voltage at a monitored node and a reference voltage and controls the current flow through the variable current source to make the voltage at the monitored node to be equal to the reference voltage.

Abstract: An electrostatic discharge (ESD) protection circuit includes first and second transistors connected in series between first and second power supply nodes. A third transistor of the ESD protection circuit turns the second transistor to OFF during normal operation. A fourth transistor of the ESD protection circuit turns the first transistor ON during ESD operation. During normal operation, a damping time constant circuit of the ESD protection circuit turns the fourth transistor OFF, and during ESD operation, turns the fourth transistor ON. A fifth transistor of the ESD protection circuit turns the second transistor ON during ESD operation. The first to fifth transistors each have a voltage resistance level that is lower than power supply voltage.

Abstract: A throw-away rotating tool includes at least two grooved portions 13b, 13c formed on each of erected portions 13 and at least two protrusions 26, 27 for fitting into and removal from respective grooved portions 13b, 13c and projected from a projecting coupling portion 23, and the grooved portions 13b, 13c are formed asymmetrically about an axis O and the protrusions 26, 27 are formed asymmetrically about the axis. Thus, the direction in which the projecting coupling portion 23 can be coupled to the erected portions 13 is uniquely determined. Consequently, variations in lip height and run-out can be minimized. As a result, occurrence of a bend and an increase in machined hole diameter during drilling can be prevented, thereby making it possible to minimize variations in machining accuracy and tool life.