CLEARER: a new tool for the analysis of X-ray fibre diffraction patterns and diffraction simulation from atomic structural models

Fibre diffraction can provide structural information about polymers and biopolymers that is unobtainable using other methods. This method has been used to elucidate the structures of many polymers, biopolymers and protein assemblies. Extracting structural information from fibre diffraction patterns is a major challenge. A computer program called CLEARER has been developed that aids the detailed analysis of polycrystalline fibre diffraction patterns. It offers an easy-to-use interface that enables diffraction data processing, analysis and simulation of diffraction patterns. It is likely to be applicable to structural determination for a wide range of polymeric fibrous materials. CLEARER simplifies and speeds up the data analysis process and helps to utilize all of the structural information present in the analysed X-ray and electron diffraction patterns

WHAT OF THE WORLD COURT NOW?

The Permanent Court of International Justice was expressly provided for in the League of Nations Covenant (Article XIV) of 1919 and the Statute creating it was drafted by an advisory committee of the League, meeting at the Hague, and opened for signature in the following year. By 1921 the ratifications of twenty-eight states put it into effect and the Court was formally opened, with a full quorum of judges, on February 15 (Bentham\u27s birthday) 1922. For nearly twenty years it continued to function and its sessions were suspended only by the presence of the Nazi invaders of the Netherlands

PRECEDENT IN PAST AND PRESENT LEGAL SYSTEMS

The prevailing notion that stare decisis is peculiar to the Anglican Legal System is quite provincial and far from correct. On the contrary, the principle is inherent in every legal system, at least in its primitive stage; for the earliest form of law is custom, and the core of custom is precedent, not necessarily judicial, but something quite as authoritative

An Interferometric method for evaluating holographic materials

A new method for evaluating the performance of holographic optical elements and holographic materials is described. The method involves recording a spherical holographic lens, aligning the lens in an interferometer, obtaining an interferogram, and analyzing the interferogram with fringe interpretation software . The analysis of the holographic lens provides a direct measure of the optical performance including the wavefront error or optical path difference, the point spread function, the MTF, and a set of Zernike polynomial coefficients. The aberration coefficients could prove to be very useful in quantifying the limiting performance of the holographic material as well as establishing a means for measuring the effects of different processes on optical performance. The ability to measure optical performance directly as well as the ability to isolate the performance of the hologram, holographic material, and hologram substrate separates this method from other techniques currently being used. The new method is named MINT (Method of INTerference)

Third parties in twentieth century American politics

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The relation between hemispheric lateralisation and measures of immune competence and adherence in Human Immunodeficiency Virus Type 1 (HIV-1)

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited - Copyright © 2012 Sumner et al