Crystallography – the study of crystals, their structures and properties – has antecedents predating modern science. Despite this long history, the subject remains dynamic and is changing rapidly. Protein crystallography is but one example. An understanding of many biological processes at a molecular level, already leading to a fundamental change in the treatment of many chronic illnesses, has been built upon protein crystal structure studies of awesome complexity. Other areas of rapid growth stand out. The development of computer software has revolutionised the way in which crystal structures can be depicted. The presentation of such structures as nets, for example, leads to images that compare in beauty with the best of abstract art <...>

NI 43-101 is a rule that governs how issuers disclose scientific and technical information about their mineral projects to the public. To assist mining industry participants and their advisors in understanding and applying NI 43-101, we compiled a summary of questions and CSA staff responses (Frequently Asked Questions or FAQs) that was first published on October 19, 2001 and was revised on February 8, 2002. Attached to this notice is an update to the FAQs.

We update the summary of FAQs from time to time to assist in the interpretation and application of NI 43-101 as new issues arise. We continuously update this summary of FAQs rather than create supplemental summaries in order to retain one repository of interpretative guidance for the rule. We intend to publish another comprehensive update later this year.

This Special Issue marks the tenth anniversary of the very first issue of the Journal of Structural Geology. The idea of a specialist journal in structural geology was first conceived at a meeting in September 1977 between Paul Hancock of Bristol University and Peter Henn of Pergamon Press. In June 1978 Paul Hancock formally became Editor-in-Chief, joined soon after by Tony Barber as Associate Editor. They then recruited an Editorial Advisory Board and called for papers for the first volume. Those who responded by submitting papers to a then-unknown new journal are still remembered with gratitude, because by showing their faith they started the ball rolling <...>

Рассмотрены принципы работы глобальной навигационной спутниковой сети и особенности ее применения. Изложены концепции распространения сигналов спутниковых систем. Описаны возможные источники ошибок и их устранение, изложены принципы проектирования геодезических сетей, построенных с помощью спутниковых технологий. Большой акцент сделан на применении спутниковых методов в решении геодезических задач.