Abstract: The following two problems arise when carbon is added to a starting material powder in the process of production of an MgB2 superconductor: (1) an impurity phase increases; and (2) the degree of substitution of carbon at boron sites is spatially non-uniform. This superconductor production method comprises: a mixing step of mixing a starting material powder and an additive; and a heat treatment step of heat-treating the mixture prepared in the mixing step. The starting material powder is MgB2 powder or a mixed powder of magnesium and boron, and the additive is an Mg—B—C compound containing three elements of magnesium, boron and carbon.

Abstract: The following two problems arise when carbon is added to a starting material powder in the process of production of an MgB2 superconductor: (1) an impurity phase increases; and (2) the degree of substitution of carbon at boron sites is spatially non-uniform. This superconductor production method comprises: a mixing step of mixing a starting material powder and an additive; and a heat treatment step of heat-treating the mixture prepared in the mixing step. The starting material powder is MgB2 powder or a mixed powder of magnesium and boron, and the additive is an Mg—B—C compound containing three elements of magnesium, boron and carbon.

Abstract: A memory access device for controlling accesses to a memory having a plurality of banks by a plurality of processing blocks including at least one high-priority processing block, connected to a common data bus, and outputting access requests for requesting access to the memory has a memory controller connected to the data bus to control access to the connected memory in response to the access requests while outputting operation information of the memory; and an access selection unit configured to change a designation sequence of the banks according to the operation information at the time when the high-priority processing block continuously accesses the plurality of banks and output the access requests in the changed sequence, wherein the access selection unit is configured to further change the designation sequence according to the changing operation information during a period while the access requests are not accepted by the memory controller.

Abstract: An imaging apparatus includes: an imaging unit that generates image data containing a subject image; a part dividing unit that divides the subject image into a plurality of parts; a changed-image data generating unit; a display control unit that allows a display unit to display an avatar image; a touch panel that accepts a user operation that changes a positional relationship between a plurality of resions contained in the avatar image; a positional relationship storage unit that stores positional relationship information related to the positional relationship between the plurality of resions changed according to the user operation; and an imaging control unit that allows a recording unit to record the image data, based on the positional relationship information and a positional relationship between the plurality of parts.

Abstract: An MgB2 superconducting wire excellent in critical current density property is supplied by using a crystalline boron powder which is low in costs and easy to obtain. For the wire, a precursor of the MgB2 superconducting wire is used, the precursor having a linear structure including a core region containing a magnesium powder and a boron powder, and a sheath region formed of a metal covering an outer circumferential portion of the core region. The boron powder is crystalline, and has a volume-mean particle size of 2 ?m or less.

Abstract: An imaging apparatus includes: an imaging unit that generates image data containing a subject image; a part dividing unit that divides the subject image into a plurality of parts; a changed-image data generating unit; a display control unit that allows a display unit to display an avatar image; a touch panel that accepts a user operation that changes a positional relationship between a plurality of resions contained in the avatar image; a positional relationship storage unit that stores positional relationship information related to the positional relationship between the plurality of resions changed according to the user operation; and an imaging control unit that allows a recording unit to record the image data, based on the positional relationship information and a positional relationship between the plurality of parts.

Abstract: A superconducting wire has a length that is sufficiently longer than a conventional one, and a critical current density that is uniformly high over the entire length thereof. Density of the magnesium diboride core is 1.5 g/cm3 or higher. A void is present in an arbitrary longitudinal cross-section in the longitudinal direction of the superconducting wire, when a length of a line segment which connects the most distant two points in a closed curve forming the void is assumed to be L, among the voids with length L of 20 ?m or greater, the number of voids with an angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire of 45° or greater is less than the number of voids with the angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire of smaller than 45°.

Abstract: An oxide superconductor consisting of an oxide which comprises, as constituent metal elements, bismuth, lead, strontium, calcium and copper having a molar ratio of lead to bismuth of at least 0.2:1, and having an internal structure in which domains having a relatively high concentration of lead and no long-period structure are contained in domains having a relatively low concentration of lead and a long-period structure. This oxide superconductor has a storing pinning function and a high critical current density Jc even at a high temperature and a high magnetic field, can be produced by industrial methods, and is easily processed to form wires.

Abstract: An oxide superconductor consisting of an oxide which comprises, as constituent metal elements, bismuth, lead, strontium, calcium and copper having a molar ratio of lead to bismuth of at least 0.2:1, and having an internal structure in which domains having a relatively high concentration of lead and no long-period structure are contained in domains having a relatively low concentration of lead and a long-period structure. This oxide superconductor has a storing pinning function and a high critical current density Jc even at a high temperature and a high magnetic field, can be produced by industrial methods, and is easily processed to form wires.