812 research outputs found

    BOOK REVIEWS: Ethics at the Edges of Life / Samuel Johnson

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    Professor Paul Ramsey,\u27 writing as a Christian ethicist, has revised, extended, and updated the Bampton Lectures in America that he delivered in 1975 at Columbia University. The resulting book is Ethics at the Edges of Life: Medical and Legal Intersections. A substantial portion of the book is devoted to critical analysis of a number of landmark court decisions, all of which were rendered after his delivery of the Bampton lectures--Planned Parenthood v. Danforth, on abortion; Commonwealth v. Edelin, on the treatment of a fetus during or immediately after an abortion; In re Quinlan, on the termination of life support; and Superintendent of Belchertown State School v. Saikewicz,\u27 on the decision not to provide life-prolonging treatment. The book also analyzes a statutory post-Bampton development-the 1976 California Natural Death Act.\u27 - - - - - - - - - - - - - - - - - - - - - - - With the observation that Samuel Johnson has fascinated more people than any other writer except Shakespeare, Professor W. Jackson Bate of Harvard University opens this profound biography. Now available to readers for more than three years, with the immediate excitement of its publication well-passed, the book clearly stands out as the quintessential presentation of the life of Johnson and as a monument of its genre. The force of Bate\u27s book results from his ability to combine research and literary talents.From a vast amount of material, Professor Bate has ferreted out the essential data for the composition of a portrait that depicts Johnson as the whole man, his eccentricity and greatness blended to perfection. Moreover, Bate has compiled his findings in a manner both pleasant and instructive that makes his presentation an independent work of art

    Modeling the annual thermal regime of lake Ohrid, Yugoslavia, using daily weather data

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    The time-dependent characteristics of the five weather variables which control the annual thermal response of Lake Ohrid are analyzed in detail. These are daily values for solar radiation, air temperature, humidity, wind speed and cloud cover. A simple numerical model of the lake's thermal response, forced by thermally driven density mixing, is developed and tested using observed thermal profiles for verification. The numerical model successfully reproduces the major features of the lake's thermal regime over a 6 y period from 1972 to 1977, the average root mean square value for the simulated profiles being 1.2[deg]C with extremes of 2.2 and 0.3[deg]C and a standard deviation of 0.4[deg]C.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24043/1/0000292.pd

    8.5. Cyclic vectors in spaces of analytic functions

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/41570/1/10958_2005_Article_BF01221529.pd

    Anthropogenic Space Weather

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    Anthropogenic effects on the space environment started in the late 19th century and reached their peak in the 1960s when high-altitude nuclear explosions were carried out by the USA and the Soviet Union. These explosions created artificial radiation belts near Earth that resulted in major damages to several satellites. Another, unexpected impact of the high-altitude nuclear tests was the electromagnetic pulse (EMP) that can have devastating effects over a large geographic area (as large as the continental United States). Other anthropogenic impacts on the space environment include chemical release ex- periments, high-frequency wave heating of the ionosphere and the interaction of VLF waves with the radiation belts. This paper reviews the fundamental physical process behind these phenomena and discusses the observations of their impacts.Comment: 71 pages, 35 figure

    Toward Understanding Massive Star Formation

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    Although fundamental for astrophysics, the processes that produce massive stars are not well understood. Large distances, high extinction, and short timescales of critical evolutionary phases make observations of these processes challenging. Lacking good observational guidance, theoretical models have remained controversial. This review offers a basic description of the collapse of a massive molecular core and a critical discussion of the three competing concepts of massive star formation: - monolithic collapse in isolated cores - competitive accretion in a protocluster environment - stellar collisions and mergers in very dense systems We also review the observed outflows, multiplicity, and clustering properties of massive stars, the upper initial mass function and the upper mass limit. We conclude that high-mass star formation is not merely a scaled-up version of low-mass star formation with higher accretion rates, but partly a mechanism of its own, primarily owing to the role of stellar mass and radiation pressure in controlling the dynamics.Comment: 139 pages, 18 figures, 5 tables, glossar
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