I am pleased to announce that Volume 1, Number 1 (January 2008) of the Journal of the Mechanical Behavior of Biomedical Materials is published in both print and online on ScienceDirect. This first issue contains three excellent review articles on bone and dentin, human enamel, and biocompatability of Ti-alloys as well as eight research papers.
A technique for setting up generalized continuum theories based on a balance law and nonlocal thermodynamics is suggested. The methodology does not require the introduction of gradients of the internal variable in the free energy. Elements of a generalized damage model with porosity as the internal variable are developed as an example.
A field theory of dislocation mechanics and plasticity is illustrated through new results at the nano, meso, and macro scales. Specifically, dislocation nucleation, the occurrence of wave-type response in quasi-static plasticity, and a jump condition at material interfaces and its implications for analysis of deformation localization are discussed.
I just remembered another video that I had seen some time ago. Many of you have probably seen it but here it is for those who have not. (The original page where I found it is http://www.maniacworld.com/Laminar-Reverse-Flow.html.)
Prof. Pat McMurtry's explanation is:
The governor of Virginia has asked President Bush to award the Presidential Medal of Freedom posthumously to Professor Liviu Librescu, a Holocaust survivor who died trying to save his students during the mass killings at Virginia Tech. Read more.
The Kavli Prize – three international awards for outstanding contributions to the fields of nanoscience, neuroscience and astrophysics – will be awarded for the first time in 2008. The Kavli Foundation has established these international awards to recognize seminal advances in scientific research. Each prize will consist of a scroll, a medal and a cash award of USD 1 million.
The Prizes will be awarded at a ceremony in Oslo, Norway, Fred Kavli’s native country, every two years, beginning in 2008. http://www.kavliprize.no/
When a strained film is grown on a vicinal substrate, the steps advance like a train when the deposited atoms have sufficient mobility to reach the step edges. However, as the steps advance, the strain-induced force monopoles associated with the steps cause the steps to attract to each other (J. Tersoff, PRL 74, 4962, (1995)), resulting in a thermodynamic instability of the steps in the form of step bunching (J. Tersoff, et al., PRL 75, 2730 (1995)).
The following video is a nice depiction of how the eigenmodes of a plate change with increasing forcing frequency.
