Truss

Trusses comprise of members connected
through pin joints. Truss members can
thus transmit only axial forces (tensile
and compressive forces). The basic
difference in the behavior of a truss and a
beam is that the truss comprises
members that can sustain only axial
forces but no bending moment or
shear force which are the dominant
forces in the beam.

Nanotechnology

What is Nanotechnology?
A basic definition:
 Nanotechnology is the engineering of functional systems at the molecular scale. A more generalized description of nanotechnology was subsequently established by the National Nanotechnology Initiative, which defines nanotechnology as the manipulation of matter with at least one dimension sized from 1 to 100 nanometers .
Nanotechnology as defined by size is naturally very broad, including fields of science as diverse as surface science , organic chemistry, molecular biology , semiconductor physics , microfabrication , etc.

OBJECTIVES OF STRUCTURAL DESIGN

The objectives of structural design is to design the structure for stability, strength and serviceability. It must also be economical and aesthetic.
The design of a structure must satisfy three basic requirements:
1) Stability to prevent overturning, sliding or buckling of the structure, or parts of it, under the action of loads,
2) Strength to resist safely the stresses induced by the loads in the various structural members; and
3) Serviceability to ensure satisfactory performance under service load conditions – which implies providing adequate stiffness and reinforcements to contain deflections, crack-widths and vibrations within acceptable limits, and also providing impermeability and durability (including corrosion-resistance), etc.