education

A single strand of polymer is a chain of a large number of monomers.  The monomers are joined by covalent bonds, and two bonded monomers may rotate relative to each other.  At a finite temperature, the polymer rapidly changes from one configuration to another.  When the two ends of the polymer are pulled by a force, the distance between the two ends changes.  The polymer is known as an entropic spring.

Here is the report from NBC Learn, the education arm of NBC, about Profs. John Rogers and Yonggang Huang's work on epidermal electronics.

http://www.nbclearn.com/portal/site/learn/cuecard/62961

(You can press control+click to open it, or copy the above weblink to a browser) 

These notes may serve as a reminder of tensor algebra.  The notes supplement the course on advanced elasticity.  Several books are listed at the end of the notes.

Update on 17 April.  I am now breaking up the notes on tensors, cleaning them up, and posting them as sections on linear algebra.

In the notes on the general theory of finite deformation, we have left the free energy function unspecified. The notes here describe free energy function commonly used to describe the elasticity of rubber-like materials.  These notes are part of a course on advanced elasticity