Which solution is adopted by Ethernet and what measures are taken to ensure stability in circumstances of
Question:
a) Describe four of the problems from which classical multilevel-secure systems suffer. [12 marks] (b) Your client is proposing to implement an e-mail system with the property that every e-mail sent internally within the company - that is, with no outside recipients - should be deleted after 180 days unless a manager authorises its retention. Which of the problems in part (a) would you have to consider, and why? [8 marks] 3 [TURN OVER CST.2004.7.4 4 Advanced Graphics (a) Specify an appropriate knot vector for each of the following NURBS curves. (i) A uniform cubic NURBS curve defined by six control points. (ii) Similar to (i) but passing through both endpoints. (iii) Similar to (i) but passing through the third control point, possibly with lower continuity at that point. (iv) The cubic Bezier curve defined by four control points. [8 marks] (b) Give the continuity class for each of: (i) curve (a)(i) between the knots; (ii) curve (a)(ii) at the knots; (iii) curve (a)(iii) at the third control point. [The continuity class is the highest derivative which is guaranteed to be continuous at the point(s) in question.] [3 marks] (c) The Loop and Butterfly subdivision schemes can both operate on triangular meshes, in which all of the polygons have three sides. Both schemes subdivide the mesh by introducing new vertices at the midpoints of edges, splitting every original triangle into four smaller triangles, as shown below. Each scheme has rules for calculating the locations of the new "edge" and "vertex" vertices.
Statistics Data Analysis And Decision Modeling
ISBN: 9780132744287
5th Edition
Authors: James R. Evans