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  2. Nine-dash line - Wikipedia

    en.wikipedia.org/wiki/Nine-dash_line

    Nine-dash line. The nine-dash line, also referred to as the eleven-dash line by Taiwan, is a set of line segments on various maps that accompanied the claims of the People's Republic of China (PRC, "mainland China") and the Republic of China (ROC, "Taiwan") in the South China Sea. [ 1] The contested area includes the Paracel Islands, [ a] the ...

  3. Road surface marking - Wikipedia

    en.wikipedia.org/wiki/Road_surface_marking

    On one-directional roads, a yellow line appears on the left shoulder, and a white line on the right shoulder. Passing rules are denoted by dashed lines as in the United States. In Ontario, it is legal to cross a single solid yellow line along a straight road and the vehicle is not within 30 meters of a bridge or railway crossing. [25]

  4. Contour line - Wikipedia

    en.wikipedia.org/wiki/Contour_line

    A contour line (also isoline, isopleth, isoquant or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. [ 1][ 2] It is a plane section of the three-dimensional graph of the function parallel to the -plane. More generally, a contour line for a function ...

  5. Dash - Wikipedia

    en.wikipedia.org/wiki/Dash

    The dash is a punctuation mark consisting of a long horizontal line. It is similar in appearance to the hyphen but is longer and sometimes higher from the baseline.The most common versions are the en dash –, generally longer than the hyphen but shorter than the minus sign; the em dash —, longer than either the en dash or the minus sign; and the horizontal bar ―, whose length varies ...

  6. Trough (meteorology) - Wikipedia

    en.wikipedia.org/wiki/Trough_(meteorology)

    A trough is the result of the movements of the air in the atmosphere. In regions where there is upward movement near the ground and divergence at altitude, there is a loss of mass. The pressure becomes lower at this point. At upper levels of the atmosphere, this occurs when there is a meeting of a mass of cold air and another hot one along a ...

  7. Yellow line (road marking) - Wikipedia

    en.wikipedia.org/wiki/Yellow_line_(road_marking)

    A single yellow line is a road marking that is present on the side of the carriageway across the British Isles. In the United Kingdom, the Isle of Man and Ireland, it indicates that parking or waiting at that roadside is prohibited at certain times of day. The exact times vary by area and are indicated by signs at the roadside, or by Controlled ...

  8. Sequence diagram - Wikipedia

    en.wikipedia.org/wiki/Sequence_diagram

    A sequence diagram shows, as parallel vertical lines ( lifelines ), different processes or objects that live simultaneously, and, as horizontal arrows, the messages exchanged between them in the order in which they occur. This allows for the graphical specification of simple runtime scenarios. A system sequence diagram should specify and show ...

  9. Matrix management - Wikipedia

    en.wikipedia.org/wiki/Matrix_management

    Matrix management. Matrix management is an organizational structure in which some individuals report to more than one supervisor or leader—relationships described as solid line or dotted line reporting. More broadly, it may also describe the management of cross-functional, cross-business groups and other work models that do not maintain ...