System Performance Characterization (open access)

System Performance Characterization

Characterizing an adaptive optics (AO) system refers to understanding its performance and limitations. The goal of an AO system is to correct wavefront aberrations. The uncorrected aberrations, called the residual errors and referred to in what follows simply as the errors, degrade the image quality in the science camera. Understanding the source of these errors is a great aid in designing an AO system and optimizing its performance. This chapter explains how to estimate the wavefront error terms and the relationship between the wavefront error and the degradation of the image. The analysis deals with the particular case of a HartmannShack wavefront sensor (WFS) and a continuous deformable mirror (DM), although the principles involved can be applied to any AO system.
Date: May 26, 2004
Creator: van Dam, M. A.
System: The UNT Digital Library
High Pressure Materials Research: Novel Extended Phases of Molecular Triatomics (open access)

High Pressure Materials Research: Novel Extended Phases of Molecular Triatomics

Application of high pressure significantly alters the interatomic distance and thus the nature of intermolecular interaction, chemical bonding, molecular configuration, crystal structure, and stability of solid [1]. With modern advances in high-pressure technologies [2], it is feasible to achieve a large (often up to a several-fold) compression of lattice, at which condition material can be easily forced into a new physical and chemical configuration [3]. The high-pressure thus offers enhanced opportunities to discover new phases, both stable and metastable ones, and to tune exotic properties in a wide-range of atomistic length scale, substantially greater than (often being several orders of) those achieved by other thermal (varying temperatures) and chemical (varying composition or making alloys) means. Simple molecular solids like H{sub 2}, C, CO{sub 2}, N{sub 2}, O{sub 2}, H{sub 2}O, CO, NH{sub 3}, and CH{sub 4} are bounded by strong covalent intramolecular bonds, yet relatively weak intermolecular bonds of van der Waals and/or hydrogen bonds. The weak intermolecular bonds make these solids highly compressible (i.e., low bulk moduli typically less than 10 GPa), while the strong covalent bonds make them chemically inert at least initially at low pressures. Carbon-carbon single bonds, carbon-oxygen double bonds and nitrogen-nitrogen triple bonds, for example, …
Date: May 26, 2004
Creator: Yoo, C.
System: The UNT Digital Library
Save with Solar Newsletter, Vol. 2, Issue 1, Spring 1999 (open access)

Save with Solar Newsletter, Vol. 2, Issue 1, Spring 1999

''Save with Solar'' is a quarterly bulletin produced under the Department of Energy's Federal Energy Management Program for all those who are planning or working on installations of solar and other renewable energy technologies in the Federal government's facilities. Contents include technical information about today's solar technologies and information about the programs, policies, procurement practices, and incentives that support the deployment of renewable energy in the Federal sector. Among the topics covered in this issue is a two-page article about how solar energy is being used by the National Science Foundation in NSF outposts in Antarctica. The newsletter also describes projects that meet the goals of the President's Million Solar Roofs Initiative.
Date: May 26, 1999
Creator: Eiffert, P.
System: The UNT Digital Library
Topological Cacti: Visualizing Contour-based Statistics (open access)

Topological Cacti: Visualizing Contour-based Statistics

Contours, the connected components of level sets, play an important role in understanding the global structure of a scalar field. In particular their nestingbehavior and topology-often represented in form of a contour tree-have been used extensively for visualization and analysis. However, traditional contour trees onlyencode structural properties like number of contours or the nesting of contours, but little quantitative information such as volume or other statistics. Here we use thesegmentation implied by a contour tree to compute a large number of per-contour (interval) based statistics of both the function defining the contour tree as well asother co-located functions. We introduce a new visual metaphor for contour trees, called topological cacti, that extends the traditional toporrery display of acontour tree to display additional quantitative information as width of the cactus trunk and length of its spikes. We apply the new technique to scalar fields ofvarying dimension and different measures to demonstrate the effectiveness of the approach.
Date: May 26, 2011
Creator: Weber, Gunther H.; Bremer, Peer-Timo & Pascucci, Valerio
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book

Capital AGS, IL and Hulman Regional APT AGS, IN: Mil Value and Capacity Supporting Information USAF(Disregard Restriction Header and Footer)
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) SCENARIO #105 TITLE: USA-0040 REALIGN BRAGG TO EGLIN (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) SCENARIO #105 TITLE: USA-0040 REALIGN BRAGG TO EGLIN

DISREGARD RESTRICTION HEADER AND FOOTER, SUMMARY OF SCENARIO ENVIRONMENTAL IMPACTS [TABS FINAL DRAFT] SCENARIO #105 TITLE: USA-0040 REALIGN BRAGG TO EGLIN GENERAL DESCRIPTION: Realigns Fort Bragg, NC by relocating the 7th Special Forces Group to Eglin AFB, FL Summary of Scenario Environmental Impacts
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Economic Impact Report (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Economic Impact Report

DISREGARD RESTRICTION HEADER AND FOOTER, Economic Impact Report, This report depicts the economic impact of the following Scenarios: USA-0040: 7th SFG from FT Bragg (Eglin AFB) The data in this report is rolled up by Region of Influence
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Report (Ft. Bragg, NC) Demographics (open access)

BRAC 2005 DoD Report, Army Justification Report (Ft. Bragg, NC) Demographics

DISREGARD RESTRICTION HEADER AND FOOTER, Tables and data reflecting demographics in the regional area surrounding Ft. Bragg, NC.
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005  DoD Report, Army Justification Report (Ft. Bragg, NC) Military Installation Value Chart (open access)

BRAC 2005 DoD Report, Army Justification Report (Ft. Bragg, NC) Military Installation Value Chart

DISREGARD RESTRICTION HEADER AND FOOTER
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Candidate Recommendation (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Candidate Recommendation

DISREGARD RESTRICTION HEADER AND FOOTER, Recommendation and Justification
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Recommendation Supporting Information (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Recommendation Supporting Information

DISREGARD RESTRICTION HEADER AND FOOTER
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Cobra Realignment Summary Report (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Bragg, NC) Cobra Realignment Summary Report

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Report (Ft. Gillem, GA) Military Value Analysis (Fighter) (open access)

BRAC 2005 DoD Report, Army Justification Report (Ft. Gillem, GA) Military Value Analysis (Fighter)

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Recommendation and Justification (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Recommendation and Justification

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Summary of Scenario Environmental Impacts (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Summary of Scenario Environmental Impacts

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Army Military Value Chart (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Army Military Value Chart

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem) Shaw AFB Installation Environmental Profile (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem) Shaw AFB Installation Environmental Profile

Disregard Restriction Header and Footer Shaw AFB document used as Ft. Gillem criterion.
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book

Air Force Logistics Support Centers: One Pager(Disregard Restriction Header and Footer)
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book

Air Force Logistics Support Center: Mil Value and Capacity Supporting Information USAF(Disregard Restriction Header and Footer)
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book

Air Force Logistics Support Center: COBRA USAF(Disregard Restriction Header and Footer)
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Air Force Justification Book

Air Force Logistics Support Center: Economic Impact (EIT Run) USAF(Disregard Restriction Header and Footer)
Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Demographics (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Demographics

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Criterion 7 Evaluation Tool (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem, GA) Criterion 7 Evaluation Tool

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library
BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem) Economic Impact Report (open access)

BRAC 2005 DoD Report, Army Justification Book (Ft. Gillem) Economic Impact Report

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Date: May 26, 2005
Creator: United States. Department of Defense.
System: The UNT Digital Library