Abstract: [Problem] To improve performance by making it possible to properly conduct minus crown paving work in a paving work width region in which paving work in a minus crown has been impossible in a leveling device which is provided with a main screed and a pair of extendable screeds having almost the same width as the width of the main screed and is of any type among a type in which the pair of extendable screeds is disposed behind the main screed, a type in which the pair of extendable screeds is disposed in front of the main screed, and a type in which one and the other of the pair of the extendable screeds are disposed, respectively, in front of and behind the main screed.

Abstract: When an arithmetic operation is performed on an inequality, a solution notation pattern composed of a combination of a symbol and an inequality sign symbol is determined on the basis of an expression, a solution, and an inequality sign symbol. With Line I/O being set as the calculation result display mode, the solution notation pattern data, for example, [A?X?B], is displayed in the upper part of a display unit. The values of the solutions [X1] [X2] corresponding to the symbols [A] [B] shown in the pattern data are displayed as [A=X1] [B=X2] in the lower part of the display unit. This makes it possible to display the solution of the inequality in an easy-to-understand manner.

Abstract: An electronic calculator includes: a display device; a user interface; a memory device; and a processor that is operable with the memory device to: perform a calculation to convert a fractional number into a decimal number; control the display device to display the decimal number, when the decimal number is a repeating decimal, with a symbol indicating a periodic block included in the repeating decimal control the display device to display a scroll indicator indicating that the displayed repeating decimal is scrollable when the number of digits included in the repeating decimal overflows the number of digits displayable by the display device; control the display device to display an undisplayed part of the repeating decimal to scroll in when a scroll command is input by the user through the user interface while the scroll indicator is displayed.

Abstract: When an arithmetic operation is performed on an inequality, a solution notation pattern composed of a combination of a symbol and an inequality sign symbol is determined on the basis of an expression, a solution, and an inequality sign symbol. With Line I/O being set as the calculation result display mode, the solution notation pattern data, for example, [A?X?B], is displayed in the upper part of a display unit. The values of the solutions [X1] [X2] corresponding to the symbols [A] [B] shown in the pattern data are displayed as [A=X1] [B=X2] in the lower part of the display unit. This makes it possible to display the solution of the inequality in an easy-to-understand manner.

Abstract: A method for inspecting a defect in a surface of a roll, the method comprising: applying parallel light rays onto the roll which is rotating; projecting reflected light rays from the roll onto a screen; and detecting a defect from an image formed on the screen.

Abstract: When an arithmetic operation is performed on an inequality, a solution notation pattern composed of a combination of a symbol and an inequality sign symbol is determined on the basis of an expression, a solution, and an inequality sign symbol. With Line I/O being set as the calculation result display mode, the solution notation pattern data, for example, [A?X?B], is displayed in the upper part of a display unit. The values of the solutions [X1] [X2] corresponding to the symbols [A] [B] shown in the pattern data are displayed as [A=X1] [B=X2] in the lower part of the display unit. This makes it possible to display the solution of the inequality in an easy-to-understand manner.