Abstract: A composition for an oil or gas well formation, containing a viscoelastic surfactant; and a modified nanomaterial and a producing method of the composition, and a forming method of the oil or gas well. The modified nanomaterial optionally contains a nanocellulose. The modified nanomaterial optionally has, on its surface, a sulfate group, a sulfite group, a carboxy group, an ethylene oxide chain, an amino group, an ester group, a silane group, a tertiary ammonium group or a mixture thereof.

Abstract: A method of endoscopically approaching a duodenum includes: inserting an endoscope into a duodenum of a subject through stomach; inserting a venting device into the stomach; and deflating the stomach by removing air from the stomach through the venting device.

Abstract: An authentication system SYS comprises: an imaging unit 12 capable of generating an iris image IMG_I by capturing an image of an iris of an target P; and a display unit 15 capable of displaying information related to authentication of the target using the iris image, wherein at least a part of the imaging unit is disposed in a space SP2 adjacent to a back surface 152 of the display unit, the back surface being located opposite a display surface 151 for displaying the information, and the imaging unit is oriented in a direction different from a direction in which the target is present.

Abstract: A catheter is capable of firmly fixing a shaft and a hub, and preventing a decrease in dimensional accuracy of an outer side of the hub in a radial direction. The catheter includes: a shaft that is a tubular body in which a lumen extending the shaft from a distal end to a proximal end is formed, and that includes a shaft proximal surface in which the lumen is opened and a shaft outer surface that is an outer peripheral surface of the tubular body; and a hub that is attached to the proximal end of the shaft. The hub includes a tubular accommodation unit configured to accommodate the shaft, the accommodation unit includes a hub melted surface that is directly welded to the shaft outer surface, and an absolute value of a residual strain of the accommodation unit decreases outward in a radial direction from the hub melted surface.

Abstract: A catheter includes a shaft and a hub that are firmly fixed to each other. The shaft is a tubular body in which a lumen extends throughout the shaft from a distal end to a proximal end. The shaft includes a shaft proximal surface at which the lumen opens and a shaft outer surface that is an outer peripheral surface of the tubular body. The hub is attached to the proximal end of the shaft. The hub includes a tubular accommodation unit configured to accommodate the shaft. The accommodation unit includes a hub melted surface directly welded to the shaft outer surface, and at least one of the accommodation unit and the hub is formed with a plurality of cavities at a position close to the hub melted surface.

Abstract: A catheter is configured to reduce a possibility that a shaft of a catheter inserted into a body comes off from a hub on a proximal side when a contrast agent is injected at a high pressure and the shaft is pulled out. The catheter includes a shaft and a hub that are directly fusion-bonded at a shaft accommodation portion of the hub that accommodates a proximal end of the shaft and a vicinity of the proximal end and a minimum inner diameter of the shaft accommodation portion is at any portion of the fusion surface. The shaft is thus prevented from coming off from the hub, safety of a worker is achieved without using an adhesive, a yield is further improved, and a manufacturing cost and a cost required for ensuring safety are reduced.

Abstract: An imaging apparatus for authentication includes: a first imaging unit that obtains a first image used in a first authentication process by imaging a target person; a second imaging unit that obtains a second image used in a second image process by imaging the target person in an imaging range narrower than that of the first imaging unit; a drive unit that integrally drives the first imaging unit and the second imaging unit; and a drive control unit that controls the drive unit on the basis of the first image.

Abstract: A CO2 recovery device includes: an absorption tower configured to bring an emission gas including CO2 in contact with an absorbent solution, to remove the CO2 from the emission gas, and to thereby generate a rich solution corresponding to the absorbent solution having absorbed the CO2; a regeneration tower configured to regenerate the absorbent solution by removing the CO2 from the rich solution; a heat exchanger configured to carry out heat exchange between the rich solution and the absorbent solution which is higher in temperature than the rich solution and from which the CO2 is removed; an absorbent-solution delivery pipe configured to deliver the absorbent solution subjected to the heat exchange in the heat exchanger to the absorption tower; and a bypass pipe configured to deliver the rich solution before the heat exchange to the absorbent-solution delivery pipe.

Abstract: A catheter having a tubular body including a lumen communicating from a proximal end to a distal end and in which a braided reinforcement body is embedded, and an operation unit disposed on a proximal side of the tubular body. The reinforcement body includes a plurality of first wire filaments helically wound in a first direction of a circumferential direction, toward a distal end direction of the tubular body, and a plurality of second wire filaments intersecting with the first wire filaments and helically wound in a second direction, which is a direction opposite to the first direction. At least one of the first wire filaments is a thick wire filament having a cross section larger than a cross section of a largest second wire filament.

Abstract: A torque device that has good manual operability and rather easily attaches to an elongated body such as a guide wire. A torque device for holding an elongated body comprises a first member and a second member in which is formed a connected space through which the elongated body can be inserted in the length direction. The first member and the second member are able to rotate with each other in a state in which the elongated body is being held, and have an opening that allows the space to communicate with the outside in the radial direction. At least one of the first member and the second member has a diameter decreasing portion that reduces the diameter of the space as a result of the first member and the second member rotating with each another.

Abstract: A CO2 recovery device includes: an absorption tower configured to bring an emission gas including CO2 in contact with an absorbent solution, to remove the CO2 from the emission gas, and to thereby generate a rich solution corresponding to the absorbent solution having absorbed the CO2; a regeneration tower configured to regenerate the absorbent solution by removing the CO2 from the rich solution; a heat exchanger configured to carry out heat exchange between the rich solution and the absorbent solution which is higher in temperature than the rich solution and from which the CO2 is removed; an absorbent-solution delivery pipe configured to deliver the absorbent solution subjected to the heat exchange in the heat exchanger to the absorption tower; and a bypass pipe configured to deliver the rich solution before the heat exchange to the absorbent-solution delivery pipe.

Abstract: A medical elongated body including a catheter main body. The catheter main body has a tubular body and a lumen. The tubular body includes a guide wire lumen into which a guide wire is insertable. The tubular body also a distal member positioned at the distal portion of the tubular body. The distal member has a lumen that communicates with the guide wire lumen. The inner diameter of the distal member decreases between the proximal end and a distal end opening of the distal member. The medical elongated body also includes a visible marker that extends circumferentially on the outer surface of the distal member to indicate a position of the distal member in the axial direction corresponding to a predetermined inner diameter of the distal member. The visible marker is visible before the medical elongated body is inserted into a living body.

Abstract: A CO2 recovery method includes: heating a CO2-absorbing solution that has absorbed CO2 from a gas, releasing the CO2 from the CO2-absorbing solution, and regenerating the CO2-absorbing solution, and at least one of: controlling a difference between an actual measured value and a target value of a recovery rate of the CO2 to be within a predetermined range; and controlling a difference between an actual measured value and a target value of a recovery amount of CO2 to be within a predetermined range, and controlling the CO2 recovery rate through a proportional calculation and an integration calculation based on the difference between the actual measured value and the target value of the CO2 recovery rate.

Abstract: A CO2 recovery apparatus is provided with: a CO2 absorption tower for bringing exhaust gas into contact with a CO2 absorbing liquid and making the CO2 absorbing liquid absorb the CO2 contained in the exhaust gas; a CO2 absorbing liquid regeneration tower for heating the CO2 absorbing liquid with steam and releasing CO2 from the CO2 absorbing liquid and regenerating the CO2 absorbing liquid; a flowmeter for determining the flow rates of the exhaust gas introduced into the CO2 absorption tower; and a control unit for classifying the flow rates of the exhaust gas into multiple flow rate ranges, and controlling the flow rate of the CO2 absorbing liquid supplied to the CO2 absorption tower and the flow rate of steam supplied to the CO2 absorbing liquid regeneration tower on the basis of prescribed set load values which have been previously established in accordance with the multiple flow rate ranges.

Abstract: A CO2 recovery method includes: heating a CO2-absorbing solution that has absorbed CO2 from a gas, releasing the CO2 from the CO2-absorbing solution, and regenerating the CO2-absorbing solution, and at least one of: controlling a difference between an actual measured value and a target value of a recovery rate of the CO2 to be within a predetermined range; and controlling a difference between an actual measured value and a target value of a recovery amount of CO2 to be within a predetermined range, and controlling the CO2 recovery rate through a proportional calculation and an integration calculation based on the difference between the actual measured value and the target value of the CO2 recovery rate.

Abstract: A CO2 recovery unit includes a CO2 absorber in which a gas containing CO2 contacts a CO2-absorbing solution that absorbs the CO2 in the gas; a CO2-absorbing solution regenerator that heats the CO2-absorbing solution that has absorbed the CO2, releases the CO2 from the CO2-absorbing solution, and regenerates the CO2-absorbing solution; and at least one of a CO2 recovery rate controller that controls a difference between an actual measured value and a target value of a recovery rate of the CO2 to be within a predetermined range; and a CO2 recovery amount controller that controls a difference between an actual measured value and a target value of a recovery amount of CO2 to be within a predetermined range.

Abstract: When CO2 gas is absorbed by using an absorbent circulating in an absorption tower and an absorbent regeneration tower, a first sampling part at which a lean solution sample is collected in the vicinity of an inlet for a lean solution supply line in the absorption tower, a second sampling part at which a rich solution sample is collected in the vicinity of an outlet for a rich solution supply line in the absorption tower, and an analyzing device which analyzes the collected lean solution sample and rich solution sample are provided; the lean solution sample at the first sampling part and the rich solution sample at the second sampling part are collected, respectively, in the same time period, and concentrations of CO2 gas in the lean solution sample and the rich solution sample are measured, and then the gas absorbing/regenerating operation is controlled based on measured results.

Abstract: A CO2 recovery unit includes a CO2-absorber that causes a gas containing CO2 to contact a CO2-absorbing solution and that causes the CO2 in the gas to be absorbed into the CO2-absorbing solution; a CO2-regenerator that heats the CO2-absorbing solution, releases the CO2 from the CO2-absorbing solution, and regenerates the CO2-absorbing solution; and a CO2 recovery amount controller that: calculates a computed target value of a CO2 recovery amount and a computed target value of a CO2 recovery rate based on a set value of the CO2 recovery rate, actual measured values of CO2 concentration, gas flow rate, and temperature of the gas, and calculates a maximum value of the CO2 recovery amount in the CO2-absorber and a maximum value of the CO2 recovery amount in the CO2-regenerator.

Abstract: CO2 absorber includes a CO2 absorbing section in which a CO2-containing flue gas and a CO2 absorbent are brought into contact with each other to remove CO2, and an aqueous cleaning section in which a decarbonated flue gas and rinsing water are brought into contact with each other to remove an accompanying substance. A lean solution is re-used in the absorber. The CO2 recovery device includes a degassing basin which is interposed in a rich solution supply line that supplies the rich solution from the CO2 absorber to the absorbent regenerator, and which includes a retaining section configured to remove oxygen in the rich solution.

Abstract: A medical elongated body including a catheter main body. The catheter main body has a tubular body and a lumen. The tubular body includes a guide wire lumen into which a guide wire is insertable. The tubular body also a distal member positioned at the distal portion of the tubular body. The distal member has a lumen that communicates with the guide wire lumen. The inner diameter of the distal member decreases between the proximal end and a distal end opening of the distal member. The medical elongated body also includes a visible marker that extends circumferentially on the outer surface of the distal member to indicate a position of the distal member in the axial direction corresponding to a predetermined inner diameter of the distal member. The visible marker is visible before the medical elongated body is inserted into a living body.