Abstract: The present invention provides a device for treating dementia, including: a plurality of ultrasound probes; an ultrasound transducer arranged in each of the ultrasound probes and configured to propagate unfocused ultrasound energy to a brain; and an ultrasound generator connected to each of the ultrasound probes.

Abstract: A housing (30) of a hollow-fiber membrane module (101) is so configured as to have a small-diameter part (3B) having an inner diameter smaller than an inner diameter of a flow regulation cylinder (9) facing a part of the housing (30) on which a nozzle (8) is provided, and which is arranged on a lower side than a lower end of the flow regulation cylinder (9) in an axial direction of the hollow-fiber membrane module (101); or the flow regulation cylinder (9) is so configured as to have a small-diameter part (9G) which has an inner diameter smaller than the inner diameter of the flow regulation cylinder (9) facing the part of the housing (30) on which the nozzle (8) is provided, and which is arranged on a lower side than the existing region of the flow regulation holes (10) in the axial direction of the hollow-fiber membrane module (101).

Abstract: There is provided a hollow fiber membrane module including a cylindrical case having at least a discharge port for raw water in a side face thereof; a fixing member to which open ends of a large number of hollow fiber membranes forming a hollow fiber membrane bundle housed inside the cylindrical case are fixed; and a flow straightening cylinder which is provided between the discharge port for the raw water and an outer periphery of the hollow fiber membrane bundle, which is fixed to the fixing member, and which has a plurality of flow straightening holes. The flow straightening cylinder includes a large inner diameter portion and a small inner diameter portion and the small inner diameter portion is mounted to the fixing member with a lower face of the fixing member positioned at the small inner diameter portion.

Abstract: A housing (30) of a hollow-fiber membrane module (101) is so configured as to have a small-diameter part (3B) having an inner diameter smaller than an inner diameter of a flow regulation cylinder (9) facing a part of the housing (30) on which a nozzle (8) is provided, and which is arranged on a lower side than a lower end of the flow regulation cylinder (9) in an axial direction of the hollow-fiber membrane module (101); or the flow regulation cylinder (9) is so configured as to have a small-diameter part (9G) which has an inner diameter smaller than the inner diameter of the flow regulation cylinder (9) facing the part of the housing (30) on which the nozzle (8) is provided, and which is arranged on a lower side than the existing region of the flow regulation holes (10) in the axial direction of the hollow-fiber membrane module (101).

Abstract: The present invention provides a method for hydrophilizing an external-pressure type hollow fiber membrane module, which is capable of efficiently hydrophilizing the hollow fiber membranes even in the vicinity of the bonded/fixed portion in the lower part of the casing. According to the hydrophilization method of the invention, the outer surfaces of the hollow fiber membranes in the lower part of the casing are prevented from receiving a water head pressure corresponding to the height of the membrane module and the hollow fiber membranes located in the vicinity of the lower bonded/fixed portion can be efficiently hydrophilized.

Abstract: There is provided a hollow fiber membrane module including a cylindrical case having at least a discharge port for raw water in a side face thereof; a fixing member to which open ends of a large number of hollow fiber membranes forming a hollow fiber membrane bundle housed inside the cylindrical case are fixed; and a flow straightening cylinder which is provided between the discharge port for the raw water and an outer periphery of the hollow fiber membrane bundle, which is fixed to the fixing member, and which has a plurality of flow straightening holes. The flow straightening cylinder includes a large inner diameter portion and a small inner diameter portion and the small inner diameter portion is mounted to the fixing member with a lower face of the fixing member positioned at the small inner diameter portion.

Abstract: The present invention provides a method for hydrophilizing an external-pressure type hollow fiber membrane module, which is capable of efficiently hydrophilizing the hollow fiber membranes even in the vicinity of the bonded/fixed portion in the lower part of the casing. According to the hydrophilization method of the invention, the outer surfaces of the hollow fiber membranes in the lower part of the casing are prevented from receiving a water head pressure corresponding to the height of the membrane module and the hollow fiber membranes located in the vicinity of the lower bonded/fixed portion can be efficiently hydrophilized.

Abstract: A spinning ring for a ring spinning machine is produced by clamping and pressing a ring-like steel blank by a mandrel and a forming roll, pressing and deforming the blank by cold rolling, causing the blank to fluidize in, and fill, the gap between both machining surfaces of the forming roll and the mandrel, and rolling the blank in the direction of thickness and so expanding its diameter into a predetermined size. To prevent crack, a ring-like blank whose portion having a large machining quantity is in advance machined to a smaller thickness by machining means such as forging, cutting and rolling is preferably used. Since this production method does not essentially remove the material, the yield of the material is high, and because the number of production steps is less, the production cost can be reduced.