Abstract: A turbomachine includes a rotary shaft, an impeller, a casing, a prime mover separated from the impeller in an axial direction, and a seal portion sealing between the impeller side and the prime mover side. The impeller has an impeller suction portion into which fluid is sucked and an impeller discharge portion from which the fluid is discharged. The seal portion has a rotary seal portion provided on the rotary shaft and a fixed seal portion provided on the casing. The rotary seal portion and the fixed seal portion are spaced apart from each other in a radial direction, extend in the axial direction, and form a leakage flow path through which the fluid discharged from the impeller discharge portion leaks from the impeller side to the prime mover side. The maximum seal diameter of the leakage flow path is greater than the inlet diameter of the impeller suction portion.

Abstract: A casing of a centrifugal compressor has a first wall facing a back surface of an impeller. A back gap is formed between the back surface of the impeller and the first wall. A specific speed of the impeller is set to be less than 0.1. A ratio of an axial width s of the back gap to an impeller radius r satisfies a relationship of 0.008?s/r?0.5, where the axial width s is a width of the back gap in an axial direction of the shaft, and the impeller radius r is a radius of the impeller.

Abstract: A compressor includes a rotary shaft, a motor to rotate the rotary shaft, and a gas bearing to support the rotary shaft. A passage is provided between a coil of the motor and a housing of the gas bearing. The passage carries a flow of refrigerant to cool the coil of the motor.

Abstract: A shaft seal structure including a housing having an insertion hole through which a shaft can be inserted, a cylindrical thin plate that is flexible and placed in the insertion hole, and a support arranged between the housing and the thin plate. The support elastically supports the thin plate. The thin plate has an inner peripheral surface facing an outer peripheral surface of the shaft with a gap formed between the inner peripheral surface and the shaft. The support prevents a fluid from flowing in a direction along the shaft.

Abstract: A turbo-type fluid machine includes a shaft configured to be rotationally driven, a compression mechanism having an impeller, and a coupling portion coupling an end portion of the shaft and the impeller with each other. The coupling portion is provided with a balance adjustment mechanism.

Abstract: A turbo-type fluid machine includes a shaft configured to be rotationally driven, a compression mechanism having an impeller, and a coupling portion coupling an end portion of the shaft and the impeller with each other. The coupling portion is provided with a balance adjustment mechanism.

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit and an adsorbent. The refrigerant circuit includes a compressor that compresses a refrigerant. The refrigerant circuit configures a vapor compression refrigeration cycle in which the refrigerant circulates. The adsorbent adsorbs and desorbs the refrigerant circulating in the refrigerant circuit. The adsorbent adsorbs and desorbs the refrigerant in accordance with a change in a pressure of the refrigerant circulating in the refrigerant circuit.

Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.

Abstract: An optical transmitter configured to transmit an optical signal to a photodiode includes: an angle modulator configured to perform angle modulation with respect to a transmission signal; and an optical tone signal generator configured to generate an optical tone signal, and the optical transmitter transmits an optical signal that includes a single sideband signal corresponding to an angle modulated transmission electrical signal and the optical tone signal that is disposed on a higher frequency side or a lower frequency side of a frequency band of the single sideband signal.

Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.

Abstract: Provided is a conductive paste for forming a solar cell electrode containing a glass frit component (A) as glass frit (II), the glass frit component (A) containing the following in the content ratio to the total molar number in terms of oxide: (a) 30 to 70 mol % of tellurium element, (b) 18 to 30 mol % of tungsten element, (c) 5 to 30 mol % of zinc element, (d) 1 to 15 mol % of boron element, (e) 0.3 to 5 mol % of aluminum element, (f) 0.3 to 7 mol % of one or more selected from rare earth elements in terms of oxide, and (g) 0.1 to 7 mol % of one or more selected from the group consisting of tin, lithium, and barium elements in terms of oxide. The conductive paste may have better electric characteristics and a small variation in the characteristics even at a relatively low firing temperature (for example, 760° C.).

Abstract: Provided is a conductive paste for forming a solar cell electrode containing a glass frit component (A) as glass frit (II), the glass frit component (A) containing the following in the content ratio to the total molar number in terms of oxide: (a) 30 to 70 mol % of tellurium element, (b) 18 to 30 mol % of tungsten element, (c) 5 to 30 mol % of zinc element, (d) 1 to 15 mol % of boron element, (e) 0.3 to 5 mol % of aluminum element, (f) 0.3 to 7 mol % of one or more selected from rare earth elements in terms of oxide, and (g) 0.1 to 7 mol % of one or more selected from the group consisting of tin, lithium, and barium elements in terms of oxide. The conductive paste may have better electric characteristics and a small variation in the characteristics even at a relatively low firing temperature (for example, 760° C.).

Abstract: An optical transmission system in which a transmitting station and a plurality of receiving stations are connected via an optical splitter, wherein the transmitting station includes: a controller configured to determine whether to perform intensity modulation or phase modulation on optical signals based on information on transmission distances to the receiving stations and modulation bands; an intensity modulator configured to perform intensity modulation on an optical signal; and a phase modulator configured to perform phase modulation on an optical signal, and wherein one of an intensity modulation signal and a phase modulation signal is transmitted from the transmitting station to each of the receiving stations.

Abstract: An optical transmission system in which a transmitting station and a plurality of receiving stations are connected via an optical splitter, wherein the transmitting station includes: a controller configured to determine whether to perform intensity modulation or phase modulation on optical signals based on information on transmission distances to the receiving stations and modulation bands; an intensity modulator configured to perform intensity modulation on an optical signal; and a phase modulator configured to perform phase modulation on an optical signal, and wherein one of an intensity modulation signal and a phase modulation signal is transmitted from the transmitting station to each of the receiving stations.

Abstract: The present invention provides a service request reception control method which refuses a reception of the new service request without knowing the available quantity of hardware resource prospectively and without knowing the bottleneck reason prospectively. The service request reception control method for reception control in a server device receiving a processing request from a plurality of client apparatuses comprises the steps of calculating a mean time required for a series of processing to the request from the client apparatus; determining a load state of service by comparing the mean time with a targeted service processing time; and refusing a request reception from the client apparatus based on the load state.

Abstract: A terminal device usable in connection with an external display device is disclosed, which receives a plurality of sub-image data sets into which an original image data set has been divided, with each sub-image data set having a size within a display area size of the terminal device; converts an image format of the plurality of sub-image data sets into the same image-format as an image format of the external display device, on a per-sub-image-data-set basis; regenerates the original image data set from the plurality of format-converted sub-image data sets, such that the original image data set is formed in its entirety or in plural data blocks; and outputs the regenerated original-image-data-set to the external display device.

Abstract: A terminal device usable in connection with an external display device is disclosed, which receives a plurality of sub-image data sets into which an original image data set has been divided, with each sub-image data set having a size within a display area size of the terminal device; converts an image format of the plurality of sub-image data sets into the same image-format as an image format of the external display device, on a per-sub-image-data-set basis; regenerates the original image data set from the plurality of format-converted sub-image data sets, such that the original image data set is formed in its entirety or in plural data blocks; and outputs the regenerated original-image-data-set to the external display device.

Abstract: A thin film piezoelectric device includes a substrate (12) having via holes (22) and a piezoelectric laminated structure (14) consisting of a lower electrode (15), a piezoelectric film (16), and an upper electrode (17) formed on the substrate (12) via an insulation layer (13). A plurality of thin film piezoelectric resonators (210, 220) are formed for the via holes (22). The piezoelectric laminated structure (14) includes diaphragms (23) located to face the via holes (22) and a support area other than those. The thin film piezoelectric resonators (210, 220) are electrically connected by the lower electrode (15). When the straight line in the substrate plane passing through the centers (1, 2) of the diaphragms (23) of the thin film piezoelectric resonators (210, 220) has the length D1 of the segment passing through the support area and the distance between the centers of the diaphragms of the thin film piezoelectric resonators (210, 220) is D0,the ratio D1/D0 is 0.1 to 0.5.

Abstract: A piezoelectric thin film device (10) comprising a substrate (12) having a vibration space (20), and a piezoelectric lamination structure (14) formed on the upper surface of the substrate, the piezoelectric lamination structure comprising a piezoelectric film (16) and a lower electrode (15) and upper electrode (17) which are formed on opposite surfaces thereof, respectively, the vibration space (20) being so formed as to allow the vibration of a vibrating section (23) constituted by including at least part of the piezoelectric lamination structure (14) and part of an insulating layer (13). The vibrating space (20) is composed of a first via hole (21) formed from the lower surface of the substrate (12) toward the upper surface thereof so as to form an intermediate surface (25) in the substrate, and a second via hole (22) formed from the intermediate surface (23) toward the upper surface of the substrate so as to be positioned inside the first via hole (21) as seen vertically.

Abstract: A chromatic dispersion device according to the invention comprises an input/output waveguide, a plurality of first ring waveguides and a second ring waveguide. The plurality of first ring waveguides optically couple with the input/output waveguide through directional coupling and are disposed along an optical axis direction of the input/output waveguide, each ring waveguide having a predetermined FSR (free spectral range) and group delay characteristics with a peak value of the same polarity. The second ring waveguide optically couples with the input/output waveguide through directional coupling, the second ring waveguide having the predetermined FSR and group delay characteristics with a peak value of a polarity different from those of the first ring waveguides.