Abstract: An aluminum alloy heat exchanger includes a core material formed of an aluminum alloy comprising Mn of 0.60 to 2.00 mass % and Cu of 1.00 mass % or less, with the balance being Al and inevitable impurities, and a sacrificial anode material formed of an aluminum alloy comprising Zn of 2.50 to 10.00 mass %, with the balance being Al and inevitable impurities. Pitting potential of a sacrificial anode material surface of a tube of the aluminum alloy heat exchanger in a 5% NaCl solution is ?800 (mV vs Ag/AgCl) or less, and pitting potential of an aluminum fin of the aluminum alloy heat exchanger in a 5% NaCl solution is less than the pitting potential of the sacrificial anode material surface of the tube of the aluminum alloy heat exchanger in a 5% NaCl solution.

Abstract: An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum is formed of a two-layer material in which a brazing material and a core material are stacked in this order. The core material is formed of an aluminum alloy and has a grain size of 20 to 300 ?m, and the aluminum alloy includes Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, and Fe of 1.00 mass % or less. The brazing material is formed of an aluminum alloy including Si of 4.00 to 13.00 mass % and one or two or more of Mn of 2.00 mass or less, Ti of 0.30 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less.

Abstract: A data dimensionality reduction method includes: a step of dimensionally reducing a group of data from a high-dimensional space to a low-dimensional space using a distance function that defines a distance between any two vectors in the high-dimensional space; a step of dividing the dimensionally-reduced low-dimensional space into multiple subspaces; an analysis step of performing a regression analysis using a regression model based on at least one belonging data for each divided subspace; and a step of updating p first parameters included in the distance function based on results of the regression analysis in the multiple subspaces.

Abstract: A magnetic disk device includes a plurality of disk-shaped magnetic disks, a spacer, a hub, and a clamp. Each of the magnetic disks includes a through-hole in a center section thereof. The spacer is disposed among the magnetic disks, and includes a through-hole in a center section thereof. The hub is inserted into the through-holes of the magnetic disks and the spacers. The clamp presses and holds the magnetic disks and the spacer. At surfaces where the magnetic disks and the spacer or the clamp contact, a flat surface height of an upper surface of at least one magnetic disk that contacts an outer circumference of the spacer or the clamp is lower than a flat surface height of the upper surface of at least one magnetic disk of the magnetic disks that contacts an inner circumference of the spacer or the clamp.

Abstract: An example aluminum member consisting of a mother material containing aluminum or an aluminum alloy, and an anodic oxide film on the surface of the mother material, in which the arithmetical mean roughness Ra, the mean length of roughness curve elements RSm, and the Hunter whiteness of the aluminum member, measured from the surface side of the anodic oxide film, are 0.1 ?m or more, 10 ?m or less, and 60 to 90, respectively.

Abstract: A protection sheet is to be attached to a press through package that includes a sheet-shaped container including storing portions and a cover that seals the storing portions. The protection sheet includes a resin layer and a first adhesive layer. The resin layer is releasable from the press through package and includes slits from which the resin layer starts to be released. The first adhesive layer is bonded to the resin layer such that a surface of the first adhesive layer that is an opposite side from the resin layer is to be bonded to the cover.

Abstract: A double pipe for a heat exchanger includes an inner pipe disposed in an outer pipe. In a straight-pipe portion of the double pipe, the inner pipe has a plurality of protruding parts extending in a helically offset manner along a longitudinal direction, an inner-circumferential surface of the outer pipe directly contacts the protruding parts, and outer-side channels are partitioned at a plurality of locations in a circumferential direction of the double pipe. The protruding parts are curved to protrude radially outward. In a cross section of the straight-pipe portion orthogonal to the longitudinal direction, the inner-circumferential surface of the outer pipe is circular, and an average value of D/L values of all the outer-side channels is 0.09-0.20, wherein D is defined as a maximum depth of each of the outer-side channels and L is defined as an arc length of each of the outer-side channels in the circumferential direction.

Abstract: The disclosure relates to a can lid for food or drink, the can lid including an end and a tab for opening a score formed on the end. The end and/or the tab includes an aluminum alloy containing: Mn: 0.5 mass % to 1.4 mass %, Mg: 2.0 mass % to 4.5 mass %, Si: 0.6 mass % or less, Fe: 0.8 mass % or less, Cu: 0.25 mass % or less, Cr: 0.10 mass % or less, Zn: 0.25 mass % or less, and Ti: 0.10 mass % or less. With this configuration, even if the end and/or the tab contains a recycled aluminum alloy made up of aluminum UBCs as a raw material, a can lid having such an end and/or tab that has properties required for a can lid, such as pressure resisting strength, can be provided.

Abstract: An aluminum alloy disc blank for a magnetic disc made of an aluminum alloy containing Fe: 0.005 to 1.800 mass % with the balance being Al and inevitable impurities, wherein a flatness change of the aluminum alloy disc blank for a magnetic disc when the aluminum alloy disc blank for a magnetic disc is held in the atmosphere at 50° C. or lower for 336 hours is 2.0 ?m or less.

Abstract: In an aluminum alloy sheet for forming, when hardness (Hv) is measured at intervals of 1/16 of a sheet thickness in a sheet thickness direction from a depth position at ½ the sheet thickness to a sheet surface, hardness distribution is plotted with the hardness (Hv) on a vertical axis and distance (mm) from the depth position at ½ the sheet thickness on a horizontal axis, a relation between the hardness (Hv) and the distance (mm) from the depth position at ½ the sheet thickness is approximated by a linear function based on the plotted hardness distribution, and a slope A of the linear function is determined by the least squares method, a product obtained by multiplying the slope A by the sheet thickness (mm) is 10 to 28. It is possible to provide an aluminum alloy sheet that can improve the effect of reducing the springback amount by bottoming.

Abstract: An aluminum alloy brazing sheet is formed of a brazing material, an intermediate material, a core material, and a brazing material. The intermediate material contains Mg of 0.40 to 6.00 mass %, and has total of contents of Mn, Cr, and Zr being 0.10 mass % or more. The core material contains Mg of 0.20 to 2.00 mass % and one or two or more of Mn of 1.80 mass % or less, Si of 1.50 mass % or less, Fe of 1.00 mass % or less, Cu of 1.20 mass % or less, Ti of 0.30 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less. Each of the core material and the intermediate material has a grain size of 20 to 300 ?m, and each of the brazing materials contain Si of 4.00 to 13.00 mass %.

Abstract: An opening detection sheet to be attached to a packaging material includes a metal layer, an IC, an insulating layer, and a first adhesive layer. The metal layer is releasable from the packaging material and includes a slit. The IC is mounted on the metal layer so as to cover at least a portion of the slit and for communicating with an external device. The insulating layer is disposed on an opposite side from the IC with respect to the metal layer. The first adhesive layer is bonded to the insulating layer on an opposite side from the metal layer so as to be bonded to the packaging material.

Abstract: A method of manufacturing a fin material made of an aluminum alloy for heat exchangers with no fin buckling deformation and having excellent buckling resistance in a temperature range of 400° C. to 580° C. before a filler alloy melts at the time of brazing is provided. The fin material made of an aluminum alloy for heat exchangers contains 1.0 to 2.0 mass % of Mn, 0.7 to 1.4 mass % of Si, and 0.05 to 0.3 mass % of Fe, with the balance being Al and unavoidable impurities, in which a number density of intermetallic compounds having a circle-equivalent diameter of 0.025 to 0.4 ?m is 3.0×106 particles/mm2 or more, and an amount of solid solution of Mn is 0.3 mass % or less.

Abstract: A data dimensionality reduction method includes: a step of dimensionally reducing a group of data from a high-dimensional space to a low-dimensional space using a distance function that defines a distance between any two vectors in the high-dimensional space; a step of dividing the dimensionally-reduced low-dimensional space into multiple subspaces; an analysis step of performing a regression analysis using a regression model based on at least one belonging data for each divided subspace; and a step of updating p first parameters included in the distance function based on results of the regression analysis in the multiple subspaces.

Abstract: An aluminum member includes: a base material made of aluminum or an aluminum alloy; and an anodized coating including a barrier layer on a surface of the base material and a porous layer on the barrier layer, wherein the anodized coating contains phosphorus (P) and sulfur (S), and has a thickness of 100 ?m or less, and, in a depth direction heading from a surface of the anodized coating toward the base material, a depth providing a maximum content of S in a region situated at a depth of 500 nm or more from the surface of the anodized coating is larger than a depth providing a maximum content of P, and an inequality (the maximum content of S)>(the maximum content of P) holds.

Abstract: This magnetic disk device is a 3.5-inch magnetic disk device equipped with magnetic disks formed from an aluminum alloy substrate. The magnetic disks arranged in a stacked manner have a thickness Td of 0.3 mm to 0.6 mm, the number N of magnetic disks involved is 10 to 16, and spacers disposed between the magnetic disks have an outside diameter 2 Rso of 35 mm to 65 mm. The outside diameter 2 Rso (mm) of the spacers satisfies 2 Rso??60 Td+70 and 2 Rso??0.5 N2?+16.5 N?73.

Abstract: A coolant passageway (2) of a heat sink (1) has a coolant lead-in part (21), a coolant lead-out part (22), coolant-contact parts (23), coolant-transit parts (25), and connecting parts (24). The coolant-contact parts (23) are disposed spaced apart from one another along a coolant path leading from the coolant lead-in part (21) to the coolant lead-out part (22) and are configured such that they bring the coolant into contact with a cooling-wall part. The coolant-transit parts (25) are disposed between adjacent coolant-contact parts (23) and are configured such that the coolant can transit from upstream-side coolant-contact parts (23) to downstream-side coolant-contact parts (23) in the coolant paths. The connecting parts (24) are interposed between the coolant-transit parts (25) and the coolant-contact parts (23) and have a passageway cross-sectional area that is smaller than those of the coolant-contact parts (23) and the coolant-transit parts (25).

Abstract: An aluminum alloy substrate for a magnetic disc is made of an aluminum alloy, containing Fe: 1.80 mass % or less, Mn: 0.70 mass % or less, Ni: 2.50 mass % or less, Si: 2.50 mass % or less, Cu: 1.00 mass % or less, Zn: 0.48 mass % or less and Mg: 1.00 to 3.50 mass %, wherein a total content of Fe, Mn and Ni is 1.60 to 4.50 mass % and a mass ratio of Cu/Zn is 0.01 to 0.35 or 6.00 to 50.00, with a balance being Al and inevitable impurities.

Abstract: An aluminum alloy disc blank for a magnetic disc made of an aluminum alloy containing Mg: 3.40 to 3.90 mass % with the balance being A1 and inevitable impurities, wherein a conductivity of the aluminum alloy disc blank is 36.0% IACS or higher.

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.