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Tacheometric Surveying

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Tacheometric Surveying   Download - Click Here Dr.Gunathilaka M.D.E.K. Senior Lecturer  Department of Surveying and Geodesy Faculty of Geomatics Sabaragamuwa University of Sri Lanka. 70140, Belihuloya. Branch of surveying in which both horizontal & vertical distances between stations are determined from instrumental observations (Agor, 1996). Uniqueness! No need of slope corrections, tension, etc... since no chaining involved. Rapid & convenient Good for rugged terrains with deep valleys, mountains, across water bodies... But low accuracy... Purpose; Preparation of contour plans with details. Widely used in preliminary site locating for railways, roads, canals, reservoirs, etc...  
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Properties of Engineering Materials

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Properties of Engineering Materials Download - Click Here What do engineers do?  Engineers apply the principles of science and mathematics to develop economical solutions to technical problems.  They are concerned with the structure and properties of materials used in modern technology to improve the design and fabrication What are materials? The term “material” is defined in different ways. Materials are the substances of which something is  made or composed of. Can simply group them as;  Solid  Liquid  Gas Historical Development Materials have been fundamental to the development of civilization. materials used by the different civilizations such as  Stone Copper  Bronze Iron age Material age
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Engineering Graphics and AutoCAD

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Engineering Graphics and AutoCAD lecture notes   Download - Click Here LOCUS It is a path traced out by a point moving  in a plane, in a particular manner, for one  cycle of operation. The Cycloid The cycloid is the locus of a point on the circumference of a circle as the circle rolls, without  slipping, along a straight line. The Involute There are several definitions for the involute, none being particularly easy to follow. An involute is the locus of a point, initially on a base circle, which moves so that its straight- line distance, along a tangent to the circle, to the tangential point of contact, is equal to the  distance along the arc of the circle from the initial point to the instant point of tangency. Alternatively, the involute is the locus of a point on a straight line when the straight line rolls  round the circumference of a circle without slipping. The involute is best visualised as the path traced out by the end of...
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