Optical Mineralogy

This resource is a 43 page pdf document on the principals of optical mineralogy. Topics include light, the polarizing light microscope, the refractive index, optical classes and indicatrix theory, the relationship of optical properties to crystal chemistry, and advanced methods in optical mineralogy. The website features both text and figures. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division

Martin Luther: Student of the Creation

Photograph of John Ling's ex-WD 6 wheel Scammell tractor - EET715, taken Forest site, 1 October 1962 side and front view

Review of \u3cem\u3eThe Global Luther: A Theologian for Modern Times\u3c/em\u3e

The article reviews the book The Global Luther: A Theologian for Modern Times edited by Christine Helmer

Probing the Low-x Structure of the Nucleus with the PHENIX Detector

One of the fundamental goals of the PHENIX experiment is to understand the structure of cold nuclear matter, since this serves as the initial state for heavy-ion collisions. Knowing the initial state is vital for interpreting measurements from heavy-ion collisions. Moreover, the structure of the cold nucleus by itself is interesting since it is a test-bed for our understanding of QCD. In particular there is the possibility of novel QCD effects such as gluon saturation at low-x in the nucleus. At RHIC we can probe the behavior of gluons at low-x by measuring the pair cross-section of di-hadrons from di-jets in d+Au collisions. Our results show a systematic decrease in the pair cross-section as one goes to smaller impact parameters of the nucleus, and also as one goes to lower Bjorken x. There is a possibility that these interesting effects come from gluon recombination at low x in the Au nucleus.Comment: 4 pages, 3 figures, to be published in the Proceedings of the XX International Workshop on Deep Inelastic Scattering, University of Bonn, 26-30th March 201