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In the UK, city boundaries are more difficult to define, and the specific concept of a city boundary as opposed to e.g. a town or borough boundary, is less useful: British cities are defined as any town or local authority area, regardless of area or population size, that has been granted letters patent as a royal prerogative.
Thus they are instead given as basic dimensions. In modern practice basic dimensions have a rectangular box around them, or sometimes the word "BASIC". BC or B.C. bolt circle: BCD or B.C.D. bolt circle diameter: BHC bolt hole circle Same definition as the bolt circle diameter BHCS: button head cap screw: Like an SHCS but with a button head. BHN
Part of the border between Guinea and Sierra Leone. 8°N: Part of the border between Somalia and Ethiopia. 1°N: Part of the border between Equatorial Guinea and Gabon. 1°S: Most of the border between Uganda and Tanzania, and a very short section of the border between Kenya and Tanzania in Lake Victoria. 7°S
A horizontal curve with a significantly smaller radius than those before it may need enhanced curve signs. [13] This is an improvement on the concept of design speed, which only sets a lower limit for geometric design. In the example given above, a long tangent followed by a sharp curve would be acceptable if a 30 mph design speed was chosen.
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Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. These characters are characterized by being designed to be connected horizontally and/or vertically with adjacent characters, which requires proper alignment.
For example, Metric Spaces by E. T. Copson uses the term boundary to refer to Hausdorff's border, which is defined as the intersection of a set with its boundary. [1] Hausdorff also introduced the term residue , which is defined as the intersection of a set with the closure of the border of its complement.
This concept has since been widely cited and the concept of a boundary object has been adopted in computer science (particularly computer supported cooperative work), information science, [4] and management, particularly when considering cross-disciplinary work and collaboration, [5] either within one organization or with the boundary object helping to focus the efforts of multiple organizations.