Abstract: A zoom lens includes a fixed first lens group having a positive refracting power, a second lens group having a negative refracting power and movable along an optical axis, a fixed third lens group having a positive refracting power, a fourth lens group having a negative refracting power and movable along the optical axis, and a fixed fifth lens group, disposed in order from the object side to the image side. The following expressions are satisfied: 0.5<f1/(fw·ft)1/2<1.8 ?0.4<f3/f5<0.4 where f1, fw, ft, f3 and f5 are focal lengths of the first lens group, the entire lens system in a wide angle end state, the entire lens system in a telephoto end state, the third lens group and the fifth lens group, respectively.

Abstract: In video/audio information such as a movie in a mobile terminal connected to a terminal of a seat terminal for a mobile terminal, the video is converted into video data and transmitted to a seat terminal of a front seat via a transmission path. The video data are decoded by a video decoder of the seat terminal of the front seat and displayed on a video display section. Furthermore, audio is listened to by a user via a headphone of the user's own seat.

Abstract: A catadioptric lens system includes, in order of light travel: a first lens group that includes a concave mirror and a convex mirror and has a positive refractive power; a second lens group that is positioned on the image side of the concave mirror and has a negative refractive power; and a third lens group that has a positive refractive power, wherein the first lens group has a plurality of lenses on the image side of the concave mirror, and some lenses of the plurality of lenses are formed as a vibration-proof group so as to be movable in a direction perpendicular to an optical axis.

Abstract: A catadioptric lens system includes, in order of light travel: a first lens group that includes a concave mirror and a convex mirror and has a positive refractive power; a second lens group that is positioned on the image side of the concave mirror and has a negative refractive power; and a third lens group that has a positive refractive power, wherein a close-range object is brought into focus by moving the second lens group in a direction parallel with the optical axis, and wherein the following conditional expression is satisfied 0<f/f12??(0) where f is a focal length of the whole system in a state where the focus is at infinity, and f12 is a composite focal length of the first lens group and the second lens group in a state where the focus is at infinity.

Abstract: The present invention relates to an ethylene-?-olefin copolymer comprising monomer units derived from ethylene and monomer units derived from an ?-olefin having from 3 to 20 carbon atoms, wherein the copolymer has a melt flow rate of 0.01 to 100 g/10 min, a density of 860 to 970 kg/m3, a molecular weight distribution of 5.5 to 12, and an activation energy of flow of 50 to 100 kJ/mol, and when the maximum take-up rate of the copolymer at 150° C. is represented by MTV150 and the maximum take-up rate of the copolymer at 190° C. is represented by MTV190, MTV150 is 40 m/min or more, and the ratio of MTV150 to MTV190 is 1 or less.

Abstract: A method for producing a high-quality group-III element nitride crystal at a high crystal growth rate, and a group-III element nitride crystal are provided. The method includes the steps of placing a group-III element, an alkali metal, and a seed crystal of group-III element nitride in a crystal growth vessel, pressurizing and heating the crystal growth vessel in an atmosphere of nitrogen-containing gas, and causing the group-III element and nitrogen to react with each other in a melt of the group-III element, the alkali metal and the nitrogen so that a group-III element nitride crystal is grown using the seed crystal as a nucleus. A hydrocarbon having a boiling point higher than the melting point of the alkali metal is added before the pressurization and heating of the crystal growth vessel.

Abstract: The present invention provides a technique to accurately grasp a deterioration state of a development agent in a development device, in a development system which supplies a new development agent consisting of a toner and a carrier and discharges an deteriorated development agent to maintain a performance of a development agent in a development device. An image forming apparatus according to the present invention includes a stirring information obtaining section configured to obtain information of a stirring time of the development agent in the development device, a supply information obtaining section configured to obtain information of an amount of the carrier supplied into the development device, and a deterioration degree determining section configured to determine a deterioration degree of the development agent in the development device on the basis of the information obtained by the stirring information obtaining section and the supply information obtaining section.

Abstract: Provided is a zoom lens that has a plurality of lens groups and performs zooming by changing spaces between the plurality of lens groups. A final lens group closest to an image side includes, in order from an object side to an image side: a first partial lens group that has a negative refractive power; a second partial lens group that has a positive refractive power; and a third partial lens group that has a positive refractive power. Image blur is corrected by shifting the second partial lens group in a direction substantially perpendicular to an optical axis. Assuming that a focal length of the first partial lens group is fGF, a focal length of the second partial lens group is fGS, and a focal length of a whole lens system of the lens groups in a telephoto end state is ft, the following expressions are satisfied: ?0.24<fGF/ft<?0.09; and 0.12<fGS/ft<0.32.

Abstract: A carrier wave is generated by using a zero-cross point of an AC power source voltage as a reference timing, a data communication device connected to a first power line performs digital modulation with a normal-phase carrier wave, and a data communication device connected to a second power line near the first power line performs digital modulation with an anti-phase carrier wave. In this manner, unwanted radiation caused by a leak radio wave can be reduced while using power lines of two systems in independent data communication.

Abstract: A zoom lens formed of a plurality of lens groups and performing zooming by changing separations between predetermined lens groups. A lens group closest to an object side is fixed in both optical axis directions during zooming, and has a reflecting member for folding an optical axis approximately 90 degrees. A final lens group positioned closest to an image side and fixed in both optical axis directions during zooming has a lens part group SG having positive refractive power and a lens part group RG arranged adjacent to the image side of the lens part group SG and having negative refractive power. A blur is corrected by shifting the lens part group SG in either direction perpendicular to the optical axis.

Abstract: When a listener 10 changes the reclining angle of a backrest part 101a of a seat 101 and a head 10a of the listener 10 is thereby caused to be present outside an audible area 120a of a directional loudspeaker 120 or when the reclining angle of a front seat 100 is changed and the head 10a of the listener 10 is thereby caused to be present outside the audible area 120a of the directional loudspeaker 120, a distance L2 to an obstacle exceeds 1 m as an upper limit of a standard listening range and it is determined that the head 10a of the listener 10 is present beyond the standard listening range, and the audio output of the directional loudspeaker 120 is stopped.

Abstract: From the individual small areas of a conductor pattern arranged on the back side of a circuit board, there are individually extended leader patterns, which are midway led by through holes to the surface side of the circuit board. The individual leader patterns led to the surface side are connected with a terminal portion on the low-voltage side through jumper pads. The desired small areas are enabled to function by shorting the jumper pads with solder. The individual small areas are constituted to have a capacity of 1 pF, when caused to function, and they have such a capacity as a pattern capacitor as is proportional to the number of the shorted jumper pads.

Abstract: An object is to reduce the effect of defocusing due to the movement of an image plane when a shifting lens group movable in a direction perpendicular to the optical axis for correcting hand jiggling is positionally deviated along the optical axis, thereby maintaining high optical performance at the time of correcting hand jiggling. A zoom lens 1 includes a plurality of lens groups with distances between the lens groups being changed for variable power. A final lens group L5 which is positioned most closely to an image side has a sub lens group GS (G8) having a positive refractive power and a sub lens group GR (G9) disposed adjacent to the sub lens group GS (G8) on the image side and having a positive refractive power. The sub lens group GS is shiftable in a direction perpendicular to the optical axis for correcting image blurs.

Abstract: In video/audio information such as a movie in a mobile terminal connected to a terminal of a seat terminal for a mobile terminal, the video is converted into video data and transmitted to a seat terminal of a front seat via a transmission path. The video data are decoded by a video decoder of the seat terminal of the front seat and displayed on a video display section. Furthermore, audio is listened to by a user via a headphone of the user's own seat.

Abstract: A method for producing a high-quality group-III element nitride crystal at a high crystal growth rate, and a group-III element nitride crystal are provided. The method includes the steps of placing a group-III element, an alkali metal, and a seed crystal of group-III element nitride in a crystal growth vessel, pressurizing and heating the crystal growth vessel in an atmosphere of nitrogen-containing gas, and causing the group-III element and nitrogen to react with each other in a melt of the group-III element, the alkali metal and the nitrogen so that a group-III element nitride crystal is grown using the seed crystal as a nucleus. A hydrocarbon having a boiling point higher than the melting point of the alkali metal is added before the pressurization and heating of the crystal growth vessel.

Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.

Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.

Abstract: When a group III nitride crystal is grown in a pressurized atmosphere of a nitrogen-containing gas from a melt 50 including at least a group III element, nitrogen and an alkali metal or an alkali earth metal, a melt-holding vessel 160 that holds the above-described melt 50 is swung about two axes different in direction from each other such as an x-axis and a Y-axis.

Abstract: A zoom lens and an image pickup apparatus having such a zoom lens are provided. The zoom lens includes a first lens group in which each lens has negative refractive power, a second lens group in which each lens has positive refractive power, a third lens group in which each lens has positive refractive power. These lens groups are arranged in this order from an object side to an image side. The first lens group includes a negative lens and a positive lens which are arranged in this order from an image side to an object side. The third lens group includes a positive lens. Both surfaces of the negative lens of the first lens group are aspherical surfaces, respectively. Both surfaces of the positive surfaces of the third lens group are aspherical surfaces, respectively.

Abstract: Disclosed is a method for producing a group III nitride crystal substrate. A group III nitride crystal is formed by a growth method using a flux. The group III nitride crystal substrate is heat treated at a temperature equal to or higher than the lowest temperature at which the flux contained inside the group III nitride crystal substrate through intrusion into the crystal during the crystal formation can be discharged to outside the group III nitride crystal substrate, and equal to or lower than the highest temperature at which the surface of the group III nitride crystal substrate is not decomposed.