During the years since this book was first published in 1993 there have very few developments in the technology of magnetic particle inspection apart from improvements in instrumentation which has made the measurement of peak values of time varying currents practicable. The major changes have arisen from health and safety and environmental concerns. These involve chemicals and exposure of personnel to air-borne electromagnetic fields and long wave ultraviolet (UY.A). The changes in the acceptability of certain volatile halogenated hydrocar- bons which led to the banning of 1, 1, 1 thichloroethane in 1995 were evident in 1993. The present discussions concerning the emissions of volatile organic compounds (VOCs) in general was also current and has now reached a stage where the effects of these deliberations will become evident over the next few years. Concerns over the exposure of personnel to airborne electromagnetic fields has been current for some years as has discussions to the effects of long wave ultraviolet (UY.A) on human skin. Recommendations as to maximum permit- ted exposures over periods of time to both of these phenomena have been put forward and will doubtless form the basis of future legislation on the matter. A number of new specifications have appeared notably EN (European) and ISO specifications and some of these are still in preparation. Generally their impact will be minimal since these specifications are largely derived from existing documentation.
Can an atheist believe that life has meaning? Where do his values come from and are they different from those who believe in God or Spirit? Can he view all life as sacred and interconnected? If he doesn't believe in God, is he free of guilt? These are among the questions addressed in this small book. Written by an atheist, Is God Really Necessary? shares the author's progression from being a religious believer to being a nonbeliever. He outlines his materialist philosophy and its implications for topics such as belief in spirit, or development of a value system. The book is written in an informal personal style, but contains more formal arguments for the material point of view in the appendices.
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