"A Time for Love, A Time for Friendship" is a cautionary tale that was unintentionally written by a civilian from Queens, NY, who survived the terrorist attacks of September 11th, 2001 in downtown Manhattan, and tells the story of how the emotional turmoil left in its wake destroyed his life, how he lost the love of his life, how he was betrayed by his childhood friend, how he fought for justice, and how he is working to get his life back by trying to, intentionally, become a writer.

This comprehensively revised - essentially rewritten - new edition of the 1990 edition (described as "extremely useful" by MATHEMATICAL REVIEWS and as "understandable and comprehensive" by Scitech) guides readers through the dense array of mathematical information in the International Tables Volume A. Thus, most scientists seeking to understand a crystal structure publication can do this from this book without necessarily having to consult the International Tables themselves. This remains the only book aimed at non-crystallographers devoted to teaching them about crystallographic space groups.

Metrology is the study of measurement. It includes all theoretical and practical aspects of measurement and may be divided into three subfields:

Scientific or fundamental metrology concerns the establishment of measurement units, unit systems, development of new measurement methods, realization of measurement standards and the transfer of traceability from these standards to users in society.

This handbook contains articles dealing with general topics of measurement and articles on particular subjects in mechanics and acoustics, electricity, optics, temperature, time and frequency, chemistry, medicine and particles. The contributions of the first part are sumamrized as follows.IntroductionUnitsFundamental ConstantsFundamentals of Materials Measurement and TestingMeasurement of Mass DesnityMeasurement and Instrumentation of FlowUltrasonicsMeasurement of Basic Electromagnetic QuantitiesQuantum Electrical StandardsMetrology of Time and FrequencyTemperature MeasurementMetrology in Medicine