Nature and human nature

1974-75 Champion International Corporation Lectureship.Gerald W. Williams Collectio

Quasi-spherical direct drive fusion.

The authors present designs of quasi-spherical direction drive z-pinch loads for machines such as ZR at 28 MA load current with a 150 ns implosion time (QSDDI). A double shell system for ZR has produced a 2D simulated yield of 12 MJ, but the drive for this system on ZR has essentially no margin. A double shell system for a 56 MA driver at 150 ns implosion has produced a simulated yield of 130 MJ with considerable margin in attaining the necessary temperature and density-radius product for ignition. They also represent designs for a magnetically insulated current amplifier, (MICA), that modify the attainable ZR load current to 36 MA with a 28 ns rise time. The faster pulse provided by a MICA makes it possible to drive quasi-spherical single shell implosions (QSDD2). They present results from 1D LASNEX and 2D MACH2 simulations of promising low-adiabat cryogenic QSDD2 capsules and 1D LASNEX results of high-adiabat cryogenic QSDD2 capsules

Environmentalism, pre-environmentalism, and public policy

In the last decade, thousands of new grassroots groups have formed to oppose environmental pollution on the basis that it endangers their health. These groups have revitalized the environmental movement and enlarged its membership well beyond the middle class. Scientists, however, have been unable to corroborate these groups' claims that exposure to pollutants has caused their diseases. For policy analysts this situation appears to pose a choice between democracy and science. It needn't. Instead of evaluating the grassroots groups from the perspective of science, it is possible to evaluate science from the perspective of environmentalism. This paper argues that environmental epidemiology reflects ‘pre-environmentalist’ assumptions about nature and that new ideas about nature advanced by the environmental movement could change the way scientists collect and interpret data.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/45449/1/11077_2005_Article_BF01006494.pd

Wilderness Management: A Contradiction in Terms?

Lecture given by Dr. Roderick Nash. Introduction by Dr. John H, Ehrenreich: Dean of the College of Forestry, Wildlife and Range Sciences, and Director of the Wilderness Research Center at the Univeristy of Idaho. Dr. Nash's lecture opens with a bold statement that ""Wilderness does not exist"" and is instead ""a state of mind evoked by a state of nature"" and then proceeds to define wilderness as seen by the Wilderness Act. He claims that maps have an ""erosive effect on wilderness"" and that wilderness used to be ""a circle on a map"" that ""concentrated on keeping things like roads and buildings out"". The lecture details how management became a necesity as time went by and more people recreated in the National Parks and Wilderness Areas and that usage ""could damage natural conditions just as severely as lumbering, mining, and commercial grazing."", he emphazises this through the use of visitor statistics. The lecture then explores the idea of a ""carrying capacity of wilderness, the impact of people on nature."" The main point is summed up, wilderness management is a contradiction in terms, but necessary for there to to be any semblance of wilderness for people to experience; that they must ""manage so that less management is necessary."" A bibliography is included

Environment and Americans:The Problem of Priorities

119 hal.;ill.;23 c

From these beginnings : a biographical approach to American history

2 v. : ill., maps ; 25 cm

From These Beginnings: A Biographical Approach to American History, Volume II

https://scholar.dominican.edu/cynthia-stokes-brown-books-american-history/1014/thumbnail.jp