'Screw axis' diaporamas de présentation

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Monoclinic + 2

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Lesson 14

Lesson 14. Finish Discussion of Symmetry and Reciprocal Space Growing Crystals Collecting Data. Fourier Series. http://www.youtube.com/watch?v=y6crWlxKB_E. Apply to screw axis.

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Projective 3D geometry class 4

Projective 3D geometry class 4. Multiple View Geometry Comp 290-089 Marc Pollefeys. Content. Background : Projective geometry (2D, 3D), Parameter estimation, Algorithm evaluation. Single View : Camera model, Calibration, Single View Geometry.

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Lesson 13

Lesson 13. How the reciprocal cell appears in reciprocal space. How the non-translational symmetry elements appear in real space How translational symmetry element appear in real space. HOMEWORK.

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Lesson 13

Lesson 13. How the reciprocal cell appears in reciprocal space. How the non-translational symmetry elements appear in real space How translational symmetry element appear in real space. HOMEWORK.

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Lesson 13

Lesson 13. How the reciprocal cell appears in reciprocal space. How the non-translational symmetry elements appear in real space How translational symmetry element appear in real space. Reciprocal Space. In order to look at reciprocal space we need a way to view it.

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Projective 3D geometry class 4

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Algebra of operations

Algebra of operations. Thm 1: Rotation about A thru angle ? followed by translation T to axis = rotation thru same angle ? about B on bisector of AA' at T/2 cot ( ? /2) from AA'. Algebra of operations. a. a. -1. a. a. Thm 1:

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Projective 3D geometry

Projective 3D geometry. Singular Value Decomposition. Singular Value Decomposition. Homogeneous least-squares Span and null-space Closest rank r approximation Pseudo inverse. Projective 3D Geometry. Points, lines, planes and quadrics Transformations ? ? , ? ? and ? ?. 3D points.

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Background Twists in Kinematics and Wrenches in Statics

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Space Groups

Space Groups. Roya Majidi 1393. Glides: Reflection + translation Screw Axes: Rotation + translation. Screw Axis. A screw (axis) operator rotates a point/object and then moves it a fraction of the repeat distance in one go.

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Beauty, Form and Function: An Exploration of Symmetry

Beauty, Form and Function: An Exploration of Symmetry. Asset No. 21. PART II Plane (2D) and Space (3D) Symmetry. Lecture II-7. Space Symmetry Operators. Objectives. By the end of this lecture, you will be able to: describe screw axes are and how they move objects

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The Chirality of Shells

The Chirality of Shells. Each of the shells has either right- or left-handed chirality. Identify which shells belong to each homochiral set. Instructions follow. Direction along screw axis. Rotation (four fingers)of the screw. =. =. Right-handed screw axis.

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