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3D-FFT for Signature Detection in LWIR Images

Description: Improvements in analysis detection exploitation are possible by applying whitened matched filtering within the Fourier domain to hyperspectral data cubes. We describe an implementation of a Three Dimensional Fast Fourier Transform Whitened Matched Filter (3DFFTMF) approach and, using several example sets of Long Wave Infra Red (LWIR) data cubes, compare the results with those from standard Whitened Matched Filter (WMF) techniques. Since the variability in shape of gaseous plumes precludes the u… more
Date: November 20, 2007
Creator: Medvick, Patricia A.; Lind, Michael A.; Mackey, Patrick S.; Nuffer, Lisa L. & Foote, Harlan P.
Item Type: Refine your search to only Report
open access

3D Magnetotelluic characterization of the Coso GeothermalField

Description: Electrical resistivity may contribute to progress inunderstanding geothermal systems by imaging the geometry, bounds andcontrolling structures in existing production, and thereby perhapssuggesting new areas for field expansion. To these ends, a dense grid ofmagnetotelluric (MT) stations plus a single line of contiguous bipolearray profiling has been acquired over the east flank of the Cosogeothermal system. Acquiring good quality MT data in producing geothermalsystems is a challenge due to prod… more
Date: April 23, 2007
Creator: Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E. & Gasperikova, Erika
Item Type: Refine your search to only Article
open access

3D optical sectioning with a new hyperspectral confocal fluorescence imaging system.

Description: A novel hyperspectral fluorescence microscope for high-resolution 3D optical sectioning of cells and other structures has been designed, constructed, and used to investigate a number of different problems. We have significantly extended new multivariate curve resolution (MCR) data analysis methods to deconvolve the hyperspectral image data and to rapidly extract quantitative 3D concentration distribution maps of all emitting species. The imaging system has many advantages over current confocal … more
Date: February 1, 2007
Creator: Nieman, Linda T.; Sinclair, Michael B.; Davidson, George S.; Van Benthem, Mark Hilary; Haaland, David Michael; Timlin, Jerilyn Ann et al.
Item Type: Refine your search to only Report
open access

3D Vectorial Time Domain Computational Integrated Photonics

Description: The design of integrated photonic structures poses considerable challenges. 3D-Time-Domain design tools are fundamental in enabling technologies such as all-optical logic, photonic bandgap sensors, THz imaging, and fast radiation diagnostics. Such technologies are essential to LLNL and WFO sponsors for a broad range of applications: encryption for communications and surveillance sensors (NSA, NAI and IDIV/PAT); high density optical interconnects for high-performance computing (ASCI); high-bandw… more
Date: February 16, 2007
Creator: Kallman, J S; Bond, T C; Koning, J M & Stowell, M L
Item Type: Refine your search to only Report
open access

The 4He Total Photo-Absorption Cross Section With Two- Plus Three-Nucleon Interactions From Chiral Effective Field Theory

Description: The total photo-absorption cross section of {sup 4}He is evaluated microscopically using two- (NN) and three-nucleon (NNN) interactions based upon chiral effective field theory ({chi}EFT). The calculation is performed using the Lorentz integral transform method along with the ab initio no-core shell model approach. An important feature of the present study is the consistency of the NN and NNN interactions and also, through the Siegert theorem, of the two- and three-body current operators. This … more
Date: March 9, 2007
Creator: Quaglioni, S & Navratil, P
Item Type: Refine your search to only Article
open access

6D Ionization Cooling Channel with Resonant Dispersion Generation

Description: For muons with preferable for ionization cooling momentum <300MeV/c the longitudinal motion is naturally undamped. In order to provide the longitudinal damping a correlation between muon momentum and transverse position--described in terms of the dispersion function--should be introduced. In the present report we consider the possibility of dispersion generation in a periodic sequence of alternating solenoids (FOFO channel) by choosing the tune in the second passband (i.e. above half-integer… more
Date: June 1, 2007
Creator: Palmer, R. B.; Alexahin, Yuri I. & Yonehara, K.
Item Type: Refine your search to only Article
open access

6H-SiC Photoconductive Switches Triggered at Below Bandgap Wavelengths

Description: Semi-insulating silicon carbide (SiC) is an attractive material for application as high voltage, photoconductive semiconductor switches (PCSS) due to its large bandgap, high critical electric field strength, high electron saturation velocity and high thermal conductivity. The critical field strength of 300 MV/m for 6H-SiC makes it particularly attractive for compact, high voltage, fast switching applications. To realize the benefits of the high bulk electric field strength of SiC and diffuse sw… more
Date: February 13, 2007
Creator: Sullivan, J S & Stanley, J R
Item Type: Refine your search to only Article
open access

6th Annual Systems Biology Symposium: Systems Biology and the Environment

Description: Systems biology recognizes the complex multi-scale organization of biological systems, from molecules to ecosystems. The International Symposium on Systems Biology is an annual two-day event gathering the most influential researchers transforming biology into an integrative discipline investigating complex systems. In recognition of the fundamental similarity between the scientific problems addressed in environmental science and systems biology studies at the molecular, cellular, and organismal… more
Date: April 1, 2007
Creator: Galitski, Timothy, P.
Item Type: Refine your search to only Article
open access

6th International Special Session on Current Trends in Numerical Simulation for Parallel Engineering Environments

Description: In today's world, the use of parallel programming and architectures is essential for simulating practical problems in engineering and related disciplines. Remarkable progress in CPU architecture (multi- and many-core, SMT, transactional memory, virtualization support, etc.), system scalability, and interconnect technology continues to provide new opportunities, as well as new challenges for both system architects and software developers. These trends are paralleled by progress in parallel algor… more
Date: July 9, 2007
Creator: Schulz, M & Trinitis, C
Item Type: Refine your search to only Article
open access

AB 1007 Full Fuel Cycle Analysis (FFCA) Peer Review

Description: LLNL is a participant of California's Advanced Energy Pathways (AEP) team funded by DOE (NETL). At the AEP technical review meeting on November 9, 2006. The AB 1007 FFCA team (Appendix A) requested LLNL participate in a peer review of the FFCA reports. The primary contact at the CEC was McKinley Addy. The following reports/presentations were received by LLNL: (1) Full Fuel Cycle Energy and Emissions Assumptions dated September 2006, TIAX; (2) Full Fuel cycle Assessment-Well to Tank Energy Input… more
Date: January 19, 2007
Creator: Rice, D.; Armstrong, D.; Campbell, C.; Lamont, A.; Gallegos, G.; Stewart, J. et al.
Item Type: Refine your search to only Report
open access

Ab Initio and Ab Exitu No-Core Shell Model

Description: We outline two complementary approaches based on the no core shell model (NCSM) and present recent results. In the ab initio approach, nuclear properties are evaluated with two-nucleon (NN) and three-nucleon interactions (TNI) derived within effective field theory (EFT) based on chiral perturbation theory (ChPT). Fitting two available parameters of the TNI generates good descriptions of light nuclei. In a second effort, an ab exitu approach, results are obtained with a realistic NN interaction … more
Date: October 2, 2007
Creator: Vary, J. P.; Navratil, P.; Gueorguiev, V. G.; Ormand, W. E.; Nogga, A.; Maris, P. et al.
Item Type: Refine your search to only Article
open access

Ab initio Molecular Dynamics Simulations of Water Under Static and Shock Compressed Conditions

Description: We report herein a series of ab initio simulations of water under both static and shocked conditions. We have calculated the coherent x-ray scattering intensity of several phases of water under high pressure, using ab initio Density Functional Theory (DFT). We provide new atomic scattering form factors for water at extreme conditions, which take into account frequently neglected changes in ionic charge and electron delocalization. We have also simulated liquid water undergoing shock loading of … more
Date: July 25, 2007
Creator: Goldman, N; Fried, L E; Mundy, C J; Kuo, I W; Curioni, A & Reed, E
Item Type: Refine your search to only Article
open access

Ab initio studies of niobium defects in uranium

Description: Uranium (U), with the addition of small amount of niobium (Nb), is stainless. The Nb is fully miscible with the high temperature phase of U and tends to segregate upon cooling below 647 C. The starting point of segregation is the configuration of Nb substitutional or interstitial defects. Using density-functional-theory based ab initio calculations, the authors find that the formation energy of a single vacancy is 1.08 eV, that of Nb substitution is 0.59 eV, that of Nb interstitial at octahedra… more
Date: June 1, 2007
Creator: Xiang, S.; Huang, H. & Hsiung, L.
Item Type: Refine your search to only Article
open access

Ab Initio Study of 40Ca with an Importance Truncated No-Core Shell Model

Description: We propose an importance truncation scheme for the no-core shell model, which enables converged calculations for nuclei well beyond the p-shell. It is based on an a priori measure for the importance of individual basis states constructed by means of many-body perturbation theory. Only the physically relevant states of the no-core model space are considered, which leads to a dramatic reduction of the basis dimension. We analyze the validity and efficiency of this truncation scheme using differen… more
Date: May 22, 2007
Creator: Roth, R & Navratil, P
Item Type: Refine your search to only Article
open access

The Ability of the United States Federal Radiological Monitoring and Assessment Center to Collect and Disseminate Environmental Measurements during Radiological Emergencies

Description: The Federal Radiological Monitoring and Assessment Center (FRMAC) is the United States’ response organization for radiological emergencies. The FRMAC is structured as an operations center and employs the combined resources of several federal agencies to respond to any disaster resulting in the release of radioactivity. The mission of the FRMAC is to support state and local authorities in the gathering of environmental data using an array of survey equipment ranging from alpha probes, beta/gamma… more
Date: April 30, 2007
Creator: Essex, Craig Marianno and James
Item Type: Refine your search to only Article
open access

Abortion Law Development: A Brief Overview

Description: This report summarizes the history of legislation on abortion. Moreover, the report discusses the conflict that surrounds the history of the court cases and how it has effected legislation passed since Roe v. Wade. The report also covers how Roe v. Wade and Doe v. Bolton did not cover a variety of issues that have since been raised by states seeking to restrict abortion.
Date: June 12, 2007
Creator: Jon, Shimbukuro O. & Lewis, Karen J.
Item Type: Refine your search to only Report
open access

Abortion: Legislative Response

Description: The primary focus of this issue brief is legislative action with respect to abortion. However, discussion of those legislative proposals necessarily involves a brief discussion of the leading U.S. Supreme Court decisions concerning a woman’s right to choose whether to terminate her pregnancy. For a more detailed discussion of the relevant case law, see CRS Report 95-724, Abortion Law Development: A Brief Overview.
Date: June 12, 2007
Creator: Lewis, Karen J. & Jon, Shimbukuro O.
Item Type: Refine your search to only Report
open access

About the Initiative

Description: This factsheet gives an overview of the Solar America Initiative (SAI), including goals, research and development strategy, market transformation strategy, and benefits to nation.
Date: June 1, 2007
Item Type: Refine your search to only Report
open access

Aboveground Oil Storage Tanks: Observations on EPA's Economic Analyses of Amendments to the Spill Prevention, Control, and Countermeasure Rule

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Oil in aboveground tanks can leak into soil and nearby water, threatening human health and wildlife. To prevent certain oil spills, the Environmental Protection Agency (EPA) issued the Spill Prevention, Control, and Countermeasure (SPCC) rule in 1973. EPA estimated that, in 2005, about 571,000 facilities were regulated under this rule. When finalizing amendments to the rule in 2002 and 2006 to both stre… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
open access

Abrupt onset of a second energy gap at the superconducting transition of underdoped Bi2212

Description: he superconducting gap--an energy scale tied to the superconducting phenomena--opens on the Fermi surface at the superconducting transition temperature (Tc) in conventional BCS superconductors. In underdoped high-Tc superconducting copper oxides, a pseudogap (whose relation to the superconducting gap remains a mystery) develops well above Tc (refs 1, 2). Whether the pseudogap is a distinct phenomenon or the incoherent continuation of the superconducting gap above Tc is one of the central questi… more
Date: May 26, 2007
Creator: Hussain, Zahid; Lee, W. S.; Vishik, I. M.; Tanaka, K.; Lu, D. H.; Sasagawa, T. et al.
Item Type: Refine your search to only Article
open access

Absolute and Relative Surrogate Measurements of the 236U(n,f) Cross Section as a Probe for Angular Momentum Effects

Description: Using both the absolute and relative surrogate techniques, the {sup 236}U(n,f) cross section was deduced over an equivalent neutron energy range of 0 to 20 MeV. A 42 MeV {sup 3}He beam from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory was used to perform a ({sup 3}He,{alpha}) pickup reaction on targets of {sup 235}U (J{sup {pi}}=7/2{sup -}) and {sup 238}U (J{sup {pi}}=0{sup +}) and the fission decay probabilities were determined. The {sup 235}U({sup 3}He,{alpha}f) and {sup 238… more
Date: April 3, 2007
Creator: Lyles, B; Bernstein, L; Burke, J; Escher, J; Thompson, I; Dietrich, F et al.
Item Type: Refine your search to only Article
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