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Classification of Bent-Double Galaxies: Experiences with Ensembles of Decision Trees

Description: In earlier work, we have described our experiences with the use of decision tree classifiers to identify radio-emitting galaxies with a bent-double morphology in the FIRST astronomical survey. We now extend this work to include ensembles of decision tree classifiers, including two algorithms developed by us. These algorithms randomize the decision at each node of the tree, and because they consider fewer candidate splitting points, are faster than other methods for creating ensembles. The exper… more
Date: January 8, 2002
Creator: Kamath, C & Cantu-Paz, E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface preparation and characterization of the icosahedral Al-Pd-Mn-Ga quasicrystal

Description: Auger electron spectroscopy and low-energy electron diffraction (LEED) provide basic information about the structure and composition of the fivefold surface of the quaternary quasicrystal, icosahedral Al67Pd4Mn21Ga8. Surface preparation techniques established previously for two of the icosahedral ternary alloys, Al-Pd-Mn and Al-Cu-Fe, appear to be similarly effective for Al-Pd-Mn-Ga. After annealing in the range 600-950 K, the surface concentration of Ga is constant and low. After annealing in … more
Date: January 8, 2002
Creator: Heinzig, Mark; Jenks, Cynthia J.; Van Hove, Michel; Fisher, Ian; Canfield, Paul & Thiel, Patricia A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Application of automatic differentiation for the simulation of nonisothermal, multiphase flow in geothermal reservoirs

Description: Simulation of nonisothermal, multiphase flow through fractured geothermal reservoirs involves the solution of a system of strongly nonlinear algebraic equations. The Newton-Raphson method used to solve such a nonlinear system of equations requires the evaluation of a Jacobian matrix. In this paper we discuss automatic differentiation (AD) as a method for analytically computing the Jacobian matrix of derivatives. Robustness and efficiency of the AD-generated derivative codes are compared with a … more
Date: January 8, 2002
Creator: Kim, Jong G. & Finsterle, Stefan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

WASTE CERTIFICATION PROGRAM PLAN - REVISION 7

Description: The primary changes that have been made to this revision reflect the relocation of the Waste Certification Official (WCO) organizationally from the Quality Services Division (QSD) into the Laboratory Waste Services (LWS) Organization. Additionally, the responsibilities for program oversight have been differentiated between the QSD and LWS. The intent of this effort is to ensure that those oversight functions, which properly belonged to the WCO, moved with that function; but retain an independen… more
Date: January 8, 2002
Creator: MORGAN, LK
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bosnia: U.S. Military Operations

Description: This report outlines U.S. military operations in Bosnia and discusses issues such as U.S. and Allied Participation in Bosnia Peacekeeping (IFOR/SFOR), duration, cost, arms control and military assistance. This report also includes most recent development, background analysis, and legislation.
Date: January 8, 2002
Creator: Bowman, Steven R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Intelligence Issues for Congress

Description: This report discusses intelligence issues for Congress including narcotics trafficking, conflicts between Israel and Palestine, in Iraq, and among the former Yugoslav states, and North Korean missile capabilities. Updated January 8, 2002.
Date: January 8, 2002
Creator: Best, Richard A., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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