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The Hawaiian Monk Seal in the Northwestern Hawaiian Islands, 2001

Description: The following document reports the findings of the studies of the endangered Hawaiian monk seal during 2001 in all of its reproductive sites in the Northwestern Hawaiian Islands. This document contains information evaluating the status and trends of monk seal subpopulations; natural history traits such as survival, reproduction, growth, behavior, and feeding habits; and the success of various activities designed to facilitate population growth.
Date: April 2004
Creator: Johanos, Thea C. & Baker, Jason D.
Partner: UNT Libraries Government Documents Department

Modeling a Very Rare Event to Estimate Sea Turtle Bycatch: Lessons Learned

Description: This document is an updated and expanded version of a previous report (McCracken, 2000) concerning the estimates of the rare occurrence of turtle bycatch, complete with models to approximate the amount of turtle bycatch for the years 1994 to 1999.
Date: November 2004
Creator: McCracken, Marti L.
Partner: UNT Libraries Government Documents Department

Contingency Plan for Hawaiian Monk Seal Unusual Mortality Events

Description: Report about the unusual mortality of Hawaiian Monk Seals that includes extensive background information and research along with a prospective contingency plan to respond to the issue of unusual mortality for this species.
Date: May 2004
Creator: Yochem, Pamela K.; Braun, Robert C.; Ryon, Bradley; Baker, Jason D. & Antonelis, George A.
Partner: UNT Libraries Government Documents Department

Overview of US heavy-ion fusion progress and plans

Description: Significant experimental and theoretical progress has been made in the U.S. heavy ion fusion program on high-current sources, transport, final focusing, chambers and targets for inertial fusion energy (IFE) driven by induction linac accelerators seek to provide the scientific and technical basis for the Integrated Beam Experiment (IBX), an integrated source-to-target physics experiment recently included in the list of future facilities planned by the U.S. Department of Energy. To optimize the design of IBX and future inertial fusion energy drivers, current HIF-VNL research is addressing several key issues (representative, not inclusive): gas and electron cloud effects which can exacerbate beam loss at high beam perveance and magnet aperture fill factors; ballistic neutralized and assisted-pinch focusing of neutralized heavy ion beams; limits on longitudinal compression of both neutralized and un-neutralized heavy ion bunches; and tailoring heavy ion beams for uniform target energy deposition for high energy density physics (HEDP) studies.
Date: June 1, 2004
Creator: Logan, B. G.
Partner: UNT Libraries Government Documents Department

Gas Turbine Reheat Using In-Situ Combustion

Description: Siemens Westinghouse Power Corporation (SWPC) is developing in-situ reheat (fuel injection via airfoil injection) as a means for increasing cycle efficiency and power output, with possibly reduced emissions. This report discusses engineering cycle evaluations on various reheat approaches, using GateCycle and ChemCad software simulations of typical F-class and G-class engines, modified for alternative reheat cycles. The conclusion that vane 1 reheat offers the most advantageous design agrees with the conclusions of the detailed chemical kinetics (Task 2) as verified by high temperature testing (Task 3) and Blade path CFD (Task 1) tasks. The second choice design option (vane 2 reheat after vane 1 reheat) is also validated in all tasks. A conceptual design and next recommended development tasks are presented.
Date: April 29, 2004
Creator: Newby, R.A.; Bachovchin, D.M. & Lippert, T.E.
Partner: UNT Libraries Government Documents Department

Gas Turbine Reheat Using In-Situ Combustion

Description: Gas turbine reheat is a well-known technique for increasing the power output of gas turbine, as well as the efficiency in combined cycle operation with higher heat recovery inlet temperatures. The technique also could allow development of an advanced high efficiency turbine with an additional stage, but without a higher inlet temperature. A novel reheat approach, with fuel added via internal passages in turbine airfoils, has been proposed [1]. This avoids the bulky and possible high-NOx discrete reheat combustors used in traditional approaches. The key questions regarding this approach are whether there is sufficient residence time at high temperature for fuel burnout, and whether increased emissions of NOx and CO result. This project examines the chemical kinetics basis of these questions. In the present task detailed chemical kinetics models were used to evaluate injection reheat combustion. Models used included a Siemens Westinghouse diffusion flame model, the set of CHEMKIN gas-phase kinetics equation solvers, and the GRI 3.0 detailed kinetics data base. These modules are called by a reheat-specific main program, which also provides them with data, including gas path conditions that change with distance through the turbine. Conceptually, injection could occur in either of two ways: (1) direct injection via holes in airfoil trailing edges; or (2) injection at the downstream faces of small bluff bodies placed at these edges. In the former case, combustion could occur as a diffusion flame at the hole, as a plume or streak following this zone, or as a substantially mixed out homogeneous region downstream. In the latter case, combustion could occur as a lower temperature, well-mixed, recirculating flame in the wake of the bluff body, followed by burnout in the same sequence of diffusion flame, streak, and mixed out. The results were as follows. In the case of a conventional four-stage engine, vane …
Date: April 30, 2004
Creator: Bachovchin, D.M. & Lippert, T.E.
Partner: UNT Libraries Government Documents Department

Gas Turbine Reheat Using In-Situ Combustion

Description: Siemens Westinghouse Power Corporation (SWPC) is developing in-situ reheat (fuel injection via airfoil injection) as a means for increasing cycle efficiency and power output, with possibly reduced emissions. In addition to kinetic modeling and experimental task, CFD modeling (by Texas A&M) of airfoil injection and its effects on blade aerodynamics and turbine performance. This report discusses validation of the model against single-vane combustion test data from Siemens Westinghouse, and parametric studies of injection reheat in a modern turbine. The best location for injection is at the trailing edge of the inlet guide vane. Combustion is incomplete at trailing edges of subsequent vanes. Recommendations for further development are presented.
Date: March 31, 2004
Creator: Lippert, T.E. & Bachovchin, D.M.
Partner: UNT Libraries Government Documents Department

Request for a Test Exposure of OPERA Targets in the NuMI Beam

Description: We request to use the Fermilab NuMI neutrino beam in the MINOS Near Detector Hall to produce neutrino interactions in two separate detector arrangements using prototype target bricks designed for the OPERA experiment. OPERA is scheduled to to begin taking data in the CERN Neutrinos to Gran Sasso (CNGS) beam in 2006. The proposed test set up would be located just upstream of the MINOS Near Detector. The data will be used to validate the OPERA analysis scheme and to study backward particle production in neutrino interactions, which is of interest to the OPERA collaboration as well as the neutrino community in general. In addition, we contend that the data taken in this exposure may also be useful to the MINOS collaboration as additional input to the understanding of the initial composition of the neutrino beam. Ideally, this exposure could take place in early to mid-2005, providing timely feedback to both the OPERA and MINOS collaborations.
Date: November 1, 2004
Creator: Kodama, K.; Tzanakos, G.; Baller, B.; Lundberg, B.; Rameika, R.; Saoulidou, N. et al.
Partner: UNT Libraries Government Documents Department

Aviation Security-Related Findings and Recommendations of the 9/11 Commission

Description: In response to the 9/11 Commission’s aviation security-related recommendations, two bills — H.R. 5121 and H.R. 10 — introduced in the House contain several provisions to enhance aviation security. Additionally, floor amendments to S. 2845, the National Intelligence Reform Act of 2004, contain numerous aviation security provisions, many of which address 9/11 Commission recommendations related to aviation safety. S. 2845 was passed (96-2) by the Senate on October 6, 2004. The House passed H.R. 10 on October 8 by a vote of 282-134. A conference has been requested to resolve numerous differences between H.R. 10 and S. 2845.
Date: October 13, 2004
Creator: Elias, Bartholomew
Partner: UNT Libraries Government Documents Department

Weapons of Mass Destruction: Trade Between North Korea and Pakistan

Description: In October 2002, the United States confronted North Korea about its alleged clandestine uranium enrichment program. Soon after, the Agreed Framework collapsed, North Korea expelled international inspectors, and withdrew from the Nuclear Nonproliferation Treaty (NPT). U.S. intelligence officials claimed Pakistan was a key supplier of uranium enrichment technology to North Korea, and some media reports suggested that Pakistan had exchanged centrifuge enrichment technology for North Korean help in developing longer range missiles.
Date: March 11, 2004
Creator: Squassoni, Sharon
Partner: UNT Libraries Government Documents Department
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