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2,598 Matching Results
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Topological Galleries: A High Level User Interface for Topology Controlled Volume Rendering
Existing topological interfaces to volume rendering are limited by their reliance on sophisticated knowledge of topology by the user. We extend previous work by describing topological galleries, an interface for novice users that is based on the design galleries approach. We report three contributions: an interface based on hierarchical thumbnail galleries to display the containment relationships between topologically identifiable features, the use of the pruning hierarchy instead of branch decomposition for contour tree simplification, and drag-and-drop transfer function assignment for individual components. Initial results suggest that this approach suffers from limitations due to rapid drop-off of feature size in the pruning hierarchy. We explore these limitations by providing statistics of feature size as function of depth in the pruning hierarchy of the contour tree.
Date:
June 30, 2011
Creator:
MacCarthy, Brian; Carr, Hamish & Weber, Gunther H.
Object Type:
Report
System:
The UNT Digital Library
The U.S. Government Is Establishing Procedures for a Procurement Ban against Firms that Sell Iran Technology to Disrupt Communications but Has Not Identified Any Firms
Correspondence issued by the Government Accountability Office with an abstract that begins "The U.S. Congress has found that the Iranian government continues to engage in systematic and ongoing violations of human rights, including the suppression of freedom of expression. Such violations have reportedly increased in the aftermath of the disputed presidential election in Iran on June 12, 2009. Of particular concern has been the Iranian regime's crackdown on freedom of expression and interference with the use of the Internet, mobile phones, and other means of communication in order to restrict the free flow of information. According to a Freedom House report, the Iranian authorities have employed extensive and sophisticated methods to tamper with Internet access, mobile phone services, and satellite broadcasting; monitor dissenters online; and use monitored information to intimidate and arrest dissenters. The U.S. government, governments of other nations, and nongovernmental organizations have expressed concern that firms outside Iran have aided the Iranian government in monitoring and suppressing its citizens' activities. For example, in 2008, Nokia Siemens Network, as part of a contract for mobile phone network technology, sold communications monitoring equipment to the Iranian government. As a result of credible reports that the Iranian government misused the technology …
Date:
June 30, 2011
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Universal Service Fund: Background and Options for Reform
This report provides the background and options for reform for the Universal Service Fund.
Date:
June 30, 2011
Creator:
Gilroy, Angele A.
Object Type:
Report
System:
The UNT Digital Library
USAID Global Health Programs: FY2001-FY2012 Request
None
Date:
June 30, 2011
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Visa Security Policy: Roles of the Departments of State and Homeland Security
This report discusses the visa security and visa policy questions debated in Congress. The policy questions center on whether immigration law needs to be strengthened, whether funding should be increased, and which agency should take the lead.
Date:
June 30, 2011
Creator:
Wasem, Ruth Ellen
Object Type:
Report
System:
The UNT Digital Library
Web Archives: The Future(s)
This report aims to stimulate further discussion among web archivists and researchers about the future ways in which web archives can be used by researchers.
Date:
June 30, 2011
Creator:
Meyer, Eric T.; Thomas, Arthur & Schroeder, Ralph
Object Type:
Report
System:
The UNT Digital Library