The original Rtips started in 1999. It became difficult to update because of limitations in the software with which it was created. Now I know more about R, and have decided to wade in again. In January, 2012, I took the FaqManager HTML output and converted it to LTEX with the excellent open source program pandoc, and from there I’ve been editing and updating it in LYX. From here on out, the la...

The aim of this paper is to review some of the economic drivers of large scale bioregionalisation, using examples from deep sea hydrothermal vent communities, the Antarctic and sub-Antarctic, and Australia. These economic drivers are mainly recent conservation efforts, while early 20th century bioregionalisation was driven by 19th century taxonomy and exploration to assess available biological ...

We consider the revival properties of quantum systems with an eigenspectrum En ∝ n, and compare them with the simplest member of this class – the infinite square well. In addition to having perfect revivals at integer multiples of the revival time tR, these systems all enjoy perfect fractional revivals at quarterly intervals of tR. A closer examination of the quantum evolution is performed for ...

The present work was undertaken with an aim to standardize the preservation of BHK-21 cell lines at different temperature conditions viz., at 4 C , -20 C and in LN2 using appropriate freezing medium. The cell line after preservation was revived at 10 days and 40 days intervals. We observed that the cells maintained at 4 C and LN2 at -196 C were having the highest revival rates and within 24-36 ...