Omnidirectional acceleration device Patent

Omnidirectional liquid filled accelerometer design with liquid and housing temperature compensatio

Critical Phenomena Associated with Boson Stars

We present a brief synopsis of related work (gr-qc/0007039), describing a study of black hole threshold phenomena for a self-gravitating, massive complex scalar field in spherical symmetry. We construct Type I critical solutions dynamically by tuning a one-parameter family of initial data consisting of a boson star and a massless real scalar field, and numerically evolving this data. The resulting critical solutions appear to correspond to boson stars on the unstable branch, as we show via comparisons between our simulations and perturbation theory. For low-mass critical solutions, we find small ``halos'' of matter in the tails of the solutions, and these distort the profiles which otherwise agree with unstable boson stars. These halos seem to be artifacts of the collisions between the original boson stars and the massless fields, and do not appear to belong to the true critical solutions. From this study, it appears that unstable boson stars are unstable to dispersal (``explosion'') in addition to black hole formation. Given the similarities in macroscopic stability between boson stars and neutron stars, we suggest that similar phenomena could occur in models of neutron stars.Comment: 6 Pages, 5 Figures, LaTeX. To appear in Proceedings of the 20th Texas Symposium on Relativistic Astrophysics (Dec 9-15, 2000

NITRATE REDUCTION PROGRAM AT THE LINE CREEK OPERATION

Blasting activities at the Line Creek operation are releasing oxides of nitrogen and arecontributing to chemical changes in the surrounding watersheds. Through analysis of themechanisms of nitrogen release, history of explosive usage, historical nitrate release, changingregulatory requirements, strategy analysis and social impacts associated with the release ofnitrates a nitrate reduction plan will be established.The paper develops the framework for engineering groups, operations groups andmanagers to make decisions around the development of a sustainable and achievablecommunication and monitoring plan for nitrate release while working to meeting the regulatory,social, and stakeholder requirements to continue efficient and effective mining operations.The strategy recommended within this document is to develop practices around nitratemanagement through effective operational practices, introduction of high stability emulsion andemulsion contact with water. The effective operational controls will provide the mechanisms forreduction of oxides of nitrogen rather than through capital projects

A Commonwealth of Hope: The New Deal Response to Crisis

Review of: "A Commonwealth of Hope: The New Deal Response to Crisis," by Alan Lawson

Gaining Access: Congress and the Farm Lobby, 1919-1981

Review of: Gaining Access: Congress and the Farm Lobby, 1919-1981. Hansen, John Mark

Laser diode initiated detonators for space applications

Ensign Bickford Aerospace Company (EBAC) has over ten years of experience in the design and development of laser ordnance systems. Recent efforts have focused on the development of laser diode ordnance systems for space applications. Because the laser initiated detonators contain only insensitive secondary explosives, a high degree of system safety is achieved. Typical performance characteristics of a laser diode initiated detonator are described in this paper, including all-fire level, function time, and output. A finite difference model used at EBAC to predict detonator performance, is described and calculated results are compared to experimental data. Finally, the use of statistically designed experiments to evaluate performance of laser initiated detonators is discussed

The Unknown, or Lays of the Forest

https://commons.und.edu/settler-literature/1133/thumbnail.jp