Complex source rate estimation for atmospheric transport and dispersion models (open access)

Complex source rate estimation for atmospheric transport and dispersion models

The accuracy associated with assessing the environmental consequences of an accidental atmospheric release of radioactivity is highly dependent on our knowledge of the source release rate which is generally poorly known. This paper reports on a technique that integrates the radiological measurements with atmospheric dispersion modeling for more accurate source term estimation. We construct a minimum least squares methodology for solving the inverse problem with no a priori information about the source rate.
Date: September 13, 1993
Creator: Edwards, L. L.
Object Type: Report
System: The UNT Digital Library
Demonstration of no feasibility of a Crystalline Beam in a Betatron Magnet (open access)

Demonstration of no feasibility of a Crystalline Beam in a Betatron Magnet

This technical report investigates the feasibility of a Crystalline Beam in a weak-focussing storage ring like a Betatron. At the same time the curvature effect due to the bending magnet is also investigated. As a special case, the example of a circular one-dimensional string of electrically charged particles is examined. It is found that the motion of the particles is unstable due to the dependence of the precession movement with respect to each other on their radial displacement. That is a form of negative-mass instability which can be avoided with an alternating-focussing structure corresponding to a transition energy above the energy of the particles. The calculation of the particle-particle interaction as well as of the forces due to the external magnetic field is done directly in the laboratory frame. The retarded potential expressions are used at this purpose.
Date: September 13, 1993
Creator: Ruggiero, Alessandro G.
Object Type: Report
System: The UNT Digital Library
Exploring phase space concepts in the forecasting of time series with artificial neural networks (open access)

Exploring phase space concepts in the forecasting of time series with artificial neural networks

The authors study the performance of feedforward artificial neural networks in forecasting future values of several different time series. They explore both short- and long-term prediction of several periodic time series. They find that a significant source of error in long-term prediction of time series is introduced by a phase shift between the network output and the time series. They explore the origin of this phase shift and suggest strategies for minimizing its effect. They find that the phase diagrams of the time series and the neural network forecast contain useful diagnostic information.
Date: September 13, 1993
Creator: Rogers, R. D. & Vemuri, V.
Object Type: Article
System: The UNT Digital Library
Imaging Fourier transform spectrometer (open access)

Imaging Fourier transform spectrometer

This invention is comprised of an imaging Fourier transform spectrometer having a Fourier transform infrared spectrometer providing a series of images to a focal plane array camera. The focal plane array camera is clocked to a multiple of zero crossing occurrences as caused by a moving mirror of the Fourier transform infrared spectrometer and as detected by a laser detector such that the frame capture rate of the focal plane array camera corresponds to a multiple of the zero crossing rate of the Fourier transform infrared spectrometer. The images are transmitted to a computer for processing such that representations of the images as viewed in the light of an arbitrary spectral ``fingerprint`` pattern can be displayed on a monitor or otherwise stored and manipulated by the computer.
Date: September 13, 1993
Creator: Bennett, C. L.
Object Type: Patent
System: The UNT Digital Library
Industrial alliances (open access)

Industrial alliances

The United States is emerging from the Cold War era into an exciting, but challenging future. Improving the economic competitiveness of our Nation is essential both for improving the quality of life in the United States and maintaining a strong national security. The research and technical skills used to maintain a leading edge in defense and energy now should be used to help meet the challenge of maintaining, regaining, and establishing US leadership in industrial technologies. Companies recognize that success in the world marketplace depends on products that are at the leading edge of technology, with competitive cost, quality, and performance. Los Alamos National Laboratory and its Industrial Partnership Center (IPC) has the strategic goal to make a strong contribution to the nation`s economic competitiveness by leveraging the government`s investment at the Laboratory: personnel, infrastructure, and technological expertise.
Date: September 13, 1993
Creator: Adams, K. V.
Object Type: Article
System: The UNT Digital Library
Report on the inspection of the policies and procedures for the designation and continuation of the Department of Energy`s Federally Funded Research and Development Centers (open access)

Report on the inspection of the policies and procedures for the designation and continuation of the Department of Energy`s Federally Funded Research and Development Centers

By a memorandum dated September 16, 1992, Office of Federal Procurement Policy OFPP requested that the DOE, Office of Inspector General, conduct a ``special`` audit of the nature and adequacy of DOE`s FFRDC sole-source renegotiation justifications developed since 1985. The OFPP request was based on a July 8, 1992 Senate Subcommittee on Oversight of Government Management report entitled ``Inadequate Federal Oversight of Federally Funded Research and Development Centers,`` which detailed the need for strengthened federal controls over FFRDCs. The Office of Inspector General initiated an inspection in order to review and describe the Department`s history of designating its research laboratories as FFRDCs, and to review the Department`s compliance with the OFPP policy and procedures for establishing and renewing its FFRDCs. We also reviewed DOE`s sole-source renegotiation justifications to non-competitively extend its M&O contractors that manage DOE`s FFRDCs since September 30, 1984.
Date: September 13, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library