Performance prediction of checkpointing systems in the presence of failures is a well-studied research area. This paper makes three small contributions to this research area. First, we show how to apply the concept of availability from reliability theory as a useful metric for checkpointing systems. Second, we study the average availability of uniprocessor checkpointing systems, using the libck...

introduction: root canal preparation is an important process in endodontic therapy. nickel-titanium (niti) rotary file system can be used in single length technique (simultaneous technique) without early coronal enlargement, as well as in crown-down method. the purpose of this in vitro study was to compare single length with crown-down methods’ shaping ability using mtwo niti files . materials ...

The eigen equation of pitch-angle distribution derived from the slowing-down with an energetic particle source term is solved by using Legendre series expansion method. An iteration matrix established when scattering terms become important. whole region separated into three parts, two passing regions, and one trapped area. for each finally obtained. method applied to solve equations that Maxwel...