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New DOE Office of Science/BER Water Cycle Report

July 23rd, 2013|Categories: Climate, News, News & Events, Office of Science, Research & Capabilities, Water Security|Tags: , , , , |

The DOE Office of Science/Biological and Envi­ronmental Research (BER) just released a new report: “Community Modeling and Long-Term Predic­tions of the Integrated Water Cycle.” Vince Tidwell (Earth Systems Analysis Dept.) co-led the chapter on “Use-Inspired Water Cycle Research.” The report is based on a workshop that served “as a launching point and major organizing event to identify challenges and plan the development of next-generation human-earth system models for improving long-term predictions of the regional-scale integrated [...]

Maritime Ports May Be the Next Deployment for Hydrogen Fuel Cells

July 23rd, 2013|Categories: CRF, Energy, Facilities, News, News & Events, Partnership, Research & Capabilities, Systems Engineering, Transportation Energy|Tags: , , , , , , , |

Sandia researcher Joe Pratt stands near the Port of Oakland, one of the west coast ports he studied to learn whether hydrogen fuel cells are a viable power source for docked ships. (Photo by Steffan Schulz) Hydrogen fuel cells are being used in a variety of ways to provide efficient, pollution-free power: mobile lighting systems, forklifts, emergency backup systems, and light-duty trucks, to name a few. Providing auxiliary power to ships in berth [...]

Hoboken Hopes To Reduce Power Outages With New ‘Smart Grid’ System

June 20th, 2013|Categories: Energy, Energy Assurance, Energy Storage, Energy Storage Systems, Energy Surety, Grid Integration, Infrastructure Security, Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering|Tags: , , , , , , , , , , , , , , , |

Mayor Says New System Will 'Keep Everyone Safer Through Next Storm' Hoboken makes partnership to develop smart grid system official. (Credit: Handout/Hoboken Mayor’s Office) HOBOKEN, N.J. (CBSNewYork) – Officials are hoping to reduce power outages during future storms in Hoboken by designing a “smart grid” system using military-inspired technology. The Hudson River came pouring into the streets of Hoboken when Superstorm Sandy struck cutting off road access, putting the hospital out of commission, [...]

Hoboken, New Jersey, Mayor Zimmer Announces Infrastructure Initiatives to Address Flooding, Water, and Power Systems

June 11th, 2013|Categories: Energy, Energy Assurance, Energy Storage, Energy Storage Systems, Energy Surety, Infrastructure Security, Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid|Tags: , , , , , , , , , , , , , , , |

Hoboken, NJ - Wednesday, May 15th, 2013 Hoboken Mayor Dawn Zimmer was joined by officials from North Hudson Sewerage Authority and United Water to announce major initiatives to upgrade Hoboken’s infrastructure and address flooding, water distribution, and power resilience. Hoboken Mayor Dawn Zimmer announced a partnership with North Hudson Sewerage Authority (NHSA) to build Hoboken’s second wet-weather flood pump in order to alleviate Hoboken’s 200-year flooding problem. The pump, with a capacity of [...]

Sandia Develops a Synthesis of Quantum Dots that Increases the Quantum Yield to 95.5%

May 23rd, 2013|Categories: Energy, Energy Efficiency, Materials Science, News, News & Events, Office of Science, Research & Capabilities, Solid-State Lighting|Tags: , , , , , , , , , , , , , , , , , , , , , |

White light-emitting diodes (LEDs) based on blue indium-gallium-nitride (InGaN) LEDs that excite yellow-green-emitting yttrium-aluminum-garnet: cerium phosphors (YAG:Ce, a nonhygroscopic, chemically inert inorganic scintillator) have a cold white emission that can be made warmer with the addition of a red-emitting component. Unfortunately, red emitters that satisfy all criteria for use in solid-state lighting (SSL) applications are not yet available.  The absorbance and photoluminescence emission of Type 1 quantum dots (QDs). Excitation wavelength is 460 nm. [...]

Phonon Scattering by Crystallographically Coherent Domain Walls

May 23rd, 2013|Categories: Materials Science, News, News & Events, Office of Science, Research & Capabilities|Tags: , , , , , , , , , , , , , |

Sandia staff members Jon Ihlefeld (in the Elec­tronic, Optical, & Nanostructured Materials Dept.) and Stephen Lee (in the Semiconductor Material and Device Sciences Dept.) in collaboration with professors Patrick Hopkins (Univ. of Virginia), Bryan Huey (Univ. of Connecticut), and Darrell Schlom (Cornell Univ.) recently published “Effects of coherent ferroelastic domain walls on the thermal conductivity and Kapitza conduc­tance in bismuth ferrite” in Applied Physics Let­ters. The team observed phonon scattering by coherent domain walls within [...]

Epitaxial Growth of La2O3 on Gallium Nitride and Measuring Band Offsets

May 23rd, 2013|Categories: Materials Science, News, News & Events, Research & Capabilities|Tags: , , , , , , , , , , , , , |

Reflection high energy electron diffraction (RHEED) images measured along the substrate <11‾20> direc­tion during the growth of a 40-nm-thick La2O3 film. Images represent the following stages of growth: (a) bare (0001)-oriented GaN, (b) 2 nm of La2O3, (c) 3 nm La2O3, (d) 5 nm La2O3, (e) 10 nm La2O3, & (f) 40 nm La2O3. Arrows indicate secondary diffrac­tion spots that are attributed to a cubic polymorph. Sandians Jon Ihlefeld (in the Electronic, Optical, & Nanostructured Materials Dept.), Mike Brumbach (in the Materials Characterization and [...]

Sandia Invents Versatile High-Temperature Seebeck and Electrical Conductivity Instrument

May 17th, 2013|Categories: Materials Science, News, News & Events, Office of Science, Research & Capabilities|Tags: , , , , , , |

Sandia post­doc Harlan Brown-Shaklee (in the Electronic, Optical, and Nanostructured Materials Dept.) and staff members Jon Ihlefeld (also in the Electronic, Optical, and Nanostructured Materials Dept.) and Peter Sharma (in the Materials Physics Dept.) have built a high-temperature Seebeck and electrical conductivity measurement instrument that can operate over broad atmosphere and temperature conditions. The Seebeck effect is the conversion of temperature differences directly into electricity, named after German physicist Thomas Johann Seebeck. Their instrument will [...]

Paper Describing Lessons Learned from Fukushima Receives “Outstanding Paper Award”

May 17th, 2013|Categories: Computational Modeling & Simulation, Energy, News, News & Events, Nuclear Energy, Systems Analysis|Tags: , , , , , , , , , , , , , |

Aerial view of the Fukushima plant area in 1975, showing separation between Units 5 & 6 and the majority of the complex. (National Land Image Information color aerial photographs, Ministry of Land, Infrastructure, Transport, and Tourism.) Jeff Cardoni (in the Severe Accident Analysis Dept.) presented the paper “MELCOR Simulations of the Severe Accident at the Fukushima 1F3 Reactor” at the 2012 ANS Winter Meeting and Nuclear Technology Expo, which held an embedded topical [...]

Water Increasingly Crucial in Energy Policies, Experts Say

May 16th, 2013|Categories: Energy, News, News & Events, Systems Analysis, Systems Engineering|Tags: , , , , , , , |

Power generating plants are often located near large sources of fresh water that they use as coolant for the power-generation cycle. Energy policymakers worldwide should look beyond supply security and environmental questions and consider water resource availability if they expect to succeed, experts said May 3 during a forum at the Woodrow Wilson International Center for Scholars. "Water has become the Achilles heel of some energy projects," said M. Michael Hightower, head of [...]

Sandia’s Work with Texas Southern University Cited by Representative Sheila Jackson Lee

May 16th, 2013|Categories: Analysis, Facilities, Infrastructure Security, Modeling, Modeling & Analysis, News, News & Events, NISAC, Partnership|Tags: , , , , , , , , , |

Sandia's NISAC facility. Sandia was mentioned in a letter by Representative Sheila Jackson Lee (D-TX) for outstanding work with Texas Southern University (TSU). Through the National Infrastructure Simulation and Analysis Center (NISAC) program, Sandia has partnered with TSU’s National Transportation Center of Excellence, to complete analyses of the petrochemical supply chain and related analyses of the impact of infrastructures. Representative Lee writes: “As a long-time resident of Houston, Texas, known by many as [...]

Sandia Solar Energy Test System Cited in National Engineering Competition

May 16th, 2013|Categories: Concentrating Solar Power, Energy, Energy Storage, Facilities, National Solar Thermal Test Facility, News, News & Events, Partnership, Renewable Energy, Solar|Tags: , , , , , , , , , , , |

The Molten Salt Test Loop at Sandia's National Solar Thermal Test Facility. Bridgers & Paxton Consulting Engineers, Inc., of Albuquerque, N.M., earned a National Recognition Award for exemplary engineering achievement in the American Council of Engineering Companies’ (ACEC) 47th annual Engineering Excellence Awards for the Molten Salt Test Loop (MSTL) project, part of Sandia's NSTTF. Designed and built to exacting specifications, Sandia’s MSTL system provides a means to perform accelerated lifetime testing on [...]

Louisiana Blue Ribbon Commission on Bayou Corne Safety

May 9th, 2013|Categories: Capabilities, Carbon Capture & Storage, Climate, Earth Sciences Research Center, Modeling & Analysis, News, News & Events, Research & Capabilities|Tags: , , , , , , , |

This August 3 aerial shot released by the Louisiana Department of Natural Resources shows the sinkhole near Bayou Corne, Louisiana, which has grown since it first began forming in August. Sandia researcher David Borns is part of a group of experts providing technical evaluations about possible causes and remedies for the sinkhole. (Photo courtesy of Louisiana Department of Natural Resources) Secretary Stephen Chustz, from the Louisiana Department of Natural Resources (LADNR), asked David [...]

Estimating Device or System Probability of Failure

May 9th, 2013|Categories: Analysis, Energy Surety, Facilities, Infrastructure Security, Modeling, Modeling & Analysis, News, News & Events, NISAC|Tags: , , , , , |

POF Darts is a new algorithm for the QMU problem of estimating device or system probability of failure (POF), e.g., of critical infrastructures in the face of a potentially disruptive event. POF Darts wraps around a computational simulation of a device, evaluating it at particular parameter values, such as uncertain environmental conditions and varying as-manufactured device characteristics. These evaluations are interpolated to build an estimate of the conditions under which the device fails, and their [...]

American Geophysical Union Publishes Hope Michelsen’s Induction to Alameda County Women’s Hall of Fame

May 2nd, 2013|Categories: CRF, Facilities, News, News & Events, Transportation Energy|Tags: , , , , , , , |

Sandia's Hope Michelsen. The April 9 issue of EOS, Transactions of the American Geophysical Union, ran a news item in their “Geophysisicists Honors” section about Hope Michelsen’s (in the Combustion Chemistry Dept.) induction into the Alameda County Women’s Hall of Fame ([94(15), p 144], announced here in February). The American Geophysical Union is the world’s largest professional society for geophysicists and atmospheric scientists, with more than 60,000 members.

Implemented “Vertically Lagrangian” Option in the Community Atmosphere Model

May 2nd, 2013|Categories: Analysis, Climate, Global Climate & Energy, Modeling, Modeling & Analysis, News, News & Events|Tags: , , , , , , , , , , , , , |

A screenshot from the 2-year AMIP (Atmospheric Model Intercomparison Project) precipitable water animation simulation run of the NSF/DOE Community Atmosphere Model (CAM5). The Community Earth System Model (CESM) is a state-of-the-art global climate model being developed with the support of the National Science Foundation and the Department of Energy and used for climate-change science and assessments. Sandia has been leading a multilaboratory effort to develop a new “dynamical core” for CESM’s atmospheric component. [...]

Sandia Quantum Transport Article Was the 12th Most Downloaded Paper from AIP’s Applied Physics Letters in February

May 1st, 2013|Categories: Capabilities, Materials Science, News, News & Events, Office of Science, Research & Capabilities|Tags: , , , , , , , , , , , , , , |

Research on topological insulators (TIs) has drawn intensive interests. The type-II InAs/GaSb heterostructure, due to its unusual alignment of the conduction and valence band edges of InAs and GaSb, is predicted to be a two-dimensional (2D) TI. σxx vs σxy at B = 20 T (blue dots), 25 T (black squares), and 30 T (red diamonds). Gray circles are defined by (σxx − N)2 + σxy2 = N2, with N = 1, 2, 3, and 4. Historically, type-II InAs/GaSb heterostructures have been extensively studied for infrared [...]

PV Paper Published in IEEE Transactions on Sustainable Energy

May 1st, 2013|Categories: DETL, Energy, Facilities, News, News & Events, Photovoltaic, Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, Systems Analysis|Tags: , , , , , , |

Matthew Lave is a Ph.D. student at the University of California, San Diego (UCSD). Matthew’s research focuses on variability analysis of solar radiation and solar power. His Ph.D. thesis is exploring upscaling and downscaling solar radiation time series using wavelets. Sandians Mathew Lave and Joshua Stein ( both in the Photovoltaics and Distributed Systems Dept.) along with Jan Kleissl (University of California–San Diego) published "A Wavelet-Based Variability Model (WVM) for Solar PV Power [...]

CRF Researchers Measure Reaction Rates of Second Key Atmospheric Component

May 1st, 2013|Categories: Analysis, Capabilities, Climate, CRF, Energy, Facilities, Global Climate & Energy, Modeling & Analysis, News, News & Events, Office of Science, Research & Capabilities, Sensing & Monitoring, Transportation Energy|Tags: , , , , , , , , , , , , |

Researchers at Sandia’s Combustion Research Facility, the University of Manchester, Bristol University, University of Southampton, and Hong Kong Polytechnic have successfully measured reaction rates of a second Criegee intermediate, CH3CHOO, and proven that the reactivity of the atmospheric chemical depends strongly on which way the molecule is twisted. The measurements will provide further insight into hydrocarbon combustion and atmospheric chemistry. A paper describing the research findings, “Direct Measurements of Conformer-Dependent Reactivity of the Criegee Intermediate [...]

Caterpillar, Sandia CRADA Opens Door to Multiple Research Projects

April 17th, 2013|Categories: Capabilities, Computational Modeling & Simulation, CRF, Materials Science, Modeling, Modeling, Modeling & Analysis, Modeling & Analysis, News, News & Events, Partnership, Research & Capabilities, Sensors & Optical Diagnostics, Systems Analysis, Systems Engineering, Transportation Energy|Tags: , , , , , , , , , , , , |

From left, Sandia computer scientists Brian Adams, Jim Stewart, and John Siirola look over the results of a Dakota optimization study. Caterpillar Inc.’s interest in Dakota, an open-source software tool developed by Sandia, launched talks that led to the CRADA signing. (Photo by Norman Johnson) Sandia and industrial giant Caterpillar Inc. have signed their first umbrella cooperative research and development agreement (CRADA), opening the door to a wide range of scientific research. “This [...]