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  1. Energy Citations Database (ECD) - Former Highlights

    Office of Scientific and Technical Information (OSTI)

    Archived Features Nanotechnology nanoclusterhand Photo Courtesy of LANL Nanotechnology has a vitally important role to play in addressing the nation's energy, climate change and...

  2. Nanotechnology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    & Engineering. A Advanced Functional Materials Nanotechnology Nature Nanotechnology Biosensors & Bioelectronics Small 2013 JCR Science Edition, ranked by total citations,...

  3. Nanotechnology

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Department of Energy's Nanotechnology Safety provides a forum for the exchange of best practices, lessons learned, and guidance in the area of nanotechnology safety and health management.

  4. Nanotechnology | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nanotechnology Nanotechnology The Department of Energy's Nanotechnology Safety provides a forum for the exchange of best practices, lessons learned, and guidance in the area of ...

  5. Navillum Nanotechnologies | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Navillum Nanotechnologies National Clean Energy Business Plan Competition Navillum Nanotechnologies University of Utah Navillum Nanotechnologies' innovative method for fabricating ...

  6. Navillum Nanotechnologies | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Navillum Nanotechnologies University of Utah Navillum Nanotechnologies' innovative method for fabricating quantum dots and other types of semiconducting nanocrystals at commercial ...

  7. Svaya Nanotechnologies | Open Energy Information

    Open Energy Info (EERE)

    Svaya Nanotechnologies Place: Sunnyvale, California Zip: 94085 Product: Stealth nanotechnology startup developing self-assembling, molecular-scale films useful in the PV...

  8. National Nanotechnology Initiative

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    National Nanotechnology Initiative (NNI) Basic Energy Sciences (BES) BES Home About Research Materials Sciences & Engineering (MSE) Chemical Sciences, Geosciences, and Biosciences (CSGB) Accelerator and Detector Research Research Conduct Policies DOE Energy Innovation Hubs Energy Frontier Research Centers National Nanotechnology Initiative (NNI) Nanomaterials ES&H Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC)

  9. Contribution to Nanotechnology Manufacturing

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    shares Nano 50 award for directed assembly September 3, 2008 Contribution to Nanotechnology Manufacturing LOS ALAMOS, New Mexico, September 3, 2008-A team of scientists spanning three institutions, including Los Alamos National Laboratory, has discovered a more efficient way of fusing charge-carrying electrical contacts to tiny "nanowires" of silicon to create the nanotechnology at the heart of potential future advances in modern electronics, sensing, and energy collection. Nanotech

  10. Approaches to Safe Nanotechnology | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Approaches to Safe Nanotechnology Approaches to Safe Nanotechnology Approaches to Safe Nanotechnology PDF icon CX rulemaking files More Documents & Publications Volume II, ...

  11. Center for Integrated Nanotechnologies

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ADEPS » MPA » MPA-CINT Center for Integrated Nanotechnologies Nanomaterials integration is one of many approaches we take in addressing a range of challenges, from human health to national defense. Contact Us CINT Co-Director Quanxi Jia Email Deputy Group Leader (acting) Alex Lacerda Email Group Office (505) 667-9243 First in-situ images of void collapse in explosives Los Alamos researchers and collaborators demonstrated a crucial diagnostic for studying how voids affect explosives under shock

  12. Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Features Science & Innovation Features Our strong interdisciplinary teaming and unique research facilities allow us to develop solutions to complex problems, and to support partners and collaborators, all with the goal of strengthening national security and making a safer world. Faces of Science» 70 Years of Innovations» 50 Years of Space» Top Science News of 2014» Top Ten Innovations of 2013» Energy Sustainability» Radical Supercomputing» Science Digests» Faces of Science The people

  13. Nanotechnology: Its Promise and Challenges

    SciTech Connect (OSTI)

    Vicki Colvin

    2009-05-14

    Vicki Colvin of Rice University talks about how nanotechnology-enabled systems, with dimensions on the scale of a billionth of a meter, offer great promise for solving difficult social problems and creating enormous possibilities.

  14. Nanotechnology | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanotechnology Subscribe to RSS - Nanotechnology Nanomaterials, which are measured in billionths of a meter, are prized for their use in everything from golf clubs and swimwear to microchips, paints and pharmaceutical products, thanks to their singular properties. These include exceptional strength and flexibility and high electrical conductivity. Carbon nanotubes, for example, are tens of thousands of times thinner than a human hair, yet are stronger than steel on an ounce-per-ounce basis. PPPL

  15. National Needs Drivers for Nanotechnology

    SciTech Connect (OSTI)

    Yonas, G.; Picraux, S.T.

    2000-10-09

    Societal needs related to demographics, resources, and human behavior will drive technological advances over the next 20 years. Nanotechnology is anticipated to be an important enabler of these advances, and thus maybe anticipated to have significant influence on new systems approaches to solving societal problems as well as on extending current science and technology-based applications. To examine the potential implications of nanotechnology a societal needs-driven approach is taken. Thus the methodology is to present the definition of the problem, and then examine system concepts, technology issues, and promising future directions. We approach the problem definition from a national and global security perspective and identify three key areas involving the condition of the planet, the human condition, and global security. In anticipating societal issues in the context of revolutionary technologies, such as maybe enabled by nanoscience, the importance of working on the entire life cycle of any technological solution is stressed.

  16. Altair Nanotechnologies Inc | Open Energy Information

    Open Energy Info (EERE)

    of proprietary technology for making nanocrystalline materials. Applications include batteryfuel cell development. References: Altair Nanotechnologies Inc1 This article is a...

  17. SCIENCE ON SATURDAY- "Light and Nanotechnology- Engineering ...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2, 2013, 9:30am Science On Saturday MBG Auditorium SCIENCE ON SATURDAY- "Light and Nanotechnology- Engineering & So Much More" Professor Claire Gmachl Department of Electrical...

  18. Nanotechnology and algae biofuels exhibits open July 26 at the...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanotechnology and algae biofuels exhibits open July 26 Nanotechnology and algae biofuels exhibits open July 26 at the Bradbury Science Museum The Bradbury Science Museum is ...

  19. DOE Science Showcase - Nanotechnology | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    DOE Science Showcase - Nanotechnology Nanotechnology has a vitally important role to play ... to spotlight needs and target resources in this critical area of science and technology. ...

  20. Micro- & Nano-Technologies Enabling More Compact, Lightweight...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications Micro- & Nano-Technologies Enabling More Compact, Lightweight Thermoelectric Power Generation & Cooling Systems Micro- & Nano-Technologies Enabling ...

  1. Nanotechnology: Small Materials Making a Big Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nanotechnology: Small Materials Making a Big Impact Nanotechnology: Small Materials Making a Big Impact December 14, 2010 - 12:35pm Addthis John Schueler John Schueler Former New Media Specialist, Office of Public Affairs This past Thursday, Secretary Chu delivered remarks to the Nanotechnology Innovation Summit in National Harbor, Maryland on how breakthroughs in nanotechnology are poised to transform the energy landscape. According to the National Nanotechnology Initiative,

  2. In the OSTI Collections: Nanotechnology | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    In the OSTI Collections: Nanotechnology Consider how far it is from New York to Los ... But these tiny distances are becoming significant in the new field of nanotechnology --the ...

  3. Control Banding and Nanotechnology Synergist

    SciTech Connect (OSTI)

    Zalk, D; Paik, S

    2009-12-15

    uncertainty, that attracted international NM experts to recommend this qualitative risk assessment approach for NM. However, since their CB recommendation was only in theory, we took on the challenge of developing a working toolkit, the CB Nanotool (see Zalk et al. 2009 and Paik et al. 2008), as a means to perform a risk assessment and protect researchers at the Lawrence Livermore National Laboratory. While it's been acknowledged that engineered NM have potentially endless benefits for society, it became clear to us that the very properties that make nanotechnology so useful to industry could also make them dangerous to humans and the environment. Among the uncertainties and unknowns with NM are: the contribution of their physical structure to their toxicity, significant differences in their deposition and clearance in the lungs when compared to their parent material (PM), a lack of agreement on the appropriate indices for exposure to NM, and very little background information on exposure scenarios or populations at risk. Part of this lack of background information can be traced to the lack of risk assessments historically performed in the industry, with a recent survey indicating that 65% of companies working with NM are not doing any kind of NM-specific risk assessment as they focus on traditional PM methods for IH (Helland et al. 2009). The good news is that the amount of peer-reviewed publications that address environmental, health and safety aspects of NM has been increasing over the last few years; however, the percentage of these that address practical methods to reduce exposure and protect workers is orders of magnitude lower. Our intent in developing the CB Nanotool was to create a simplified approach that would protect workers while unraveling the mysteries of NM for experts and non-experts alike. Since such a large part of the toxicological effects of both the physical and chemical properties of NM were unknown, not to mention changing logarithmically as new NM

  4. TRADITIONAL METALLURGY, NANOTECHNOLOGIES AND STRUCTURAL MATERIALS: A SORBY AWARD LECTURE

    SciTech Connect (OSTI)

    Louthan, M

    2007-07-17

    Traditional metallurgical processes are among the many ''old fashion'' practices that use nanoparticles to control the behavior of materials. Many of these practices were developed long before microscopy could resolve nanoscale features, yet the practitioners learned to manipulate and control microstructural elements that they could neither see nor identify. Furthermore, these early practitioners used that control to modify microstructures and develop desired material properties. Centuries old colored glass, ancient high strength steels and medieval organ pipes derived many of their desirable features through control of nanoparticles in their microstructures. Henry Sorby was among the first to recognize that the properties of rocks, minerals, metals and organic materials were controlled by microstructure. However, Mr. Sorby was accused of the folly of trying to study mountains with a microscope. Although he could not resolve nanoscale microstructural features, Mr. Sorby's observations revolutionized the study of materials. The importance of nanoscale microstructural elements should be emphasized, however, because the present foundation for structural materials was built by manipulating those features. That foundation currently supports several multibillion dollar industries but is not generally considered when the nanomaterials revolution is discussed. This lecture demonstrates that using nanotechnologies to control the behavior of metallic materials is almost as old as the practice of metallurgy and that many of the emergent nanomaterials technologists are walking along pathways previously paved by traditional metallurgists.

  5. Using Nanotechnology to Fight Friction and Wear | Argonne National...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Using Nanotechnology to Fight Friction and Wear Tiny diamonds wrapped in graphene help achieve "superlubricity," in which friction drops to near zero. Graphene "nanoscrolls" could...

  6. December 3, 2003: Bush signs Nanotechnology R&D Act | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3, 2003: Bush signs Nanotechnology R&D Act December 3, 2003: Bush signs Nanotechnology R&D Act December 3, 2003: Bush signs Nanotechnology R&D Act December 3, 2003 Secretary Abraham attends the signing of the 21st Century Nanotechnology Research and Development Act by President Bush. The act authorizes funding for nanotechnology research and development over four years and puts into law programs and activities supported by President Bush's National Nanotechnology Initiative. The act

  7. National Nanotechnology Initiative's Signature Initiative Sustainable Nanomanufacturing: Creating the Industries of the Future

    Broader source: Energy.gov [DOE]

    Presentation for the Sustainable Nanomaterials Workshop by National Nanotechnology Coordination Office held on June 26, 2012

  8. Nanoscience and Nanotechnology: From Energy Applications to Advanced Medical Therapies

    ScienceCinema (OSTI)

    Tijana Rajh

    2010-01-08

    Dr. Rajh will present a general talk on nanotechnology ? an overview of why nanotechnology is important and how it is useful in various fields. The specific focus will be on Solar energy conversion, environmental applications and advanced medical therapies. She has broad expertise in synthesis and characterization of nanomaterials that are used in nanotechnology including novel hybrid systems connecting semiconductors to biological molecules like DNA and antibodies. This technology could lead to new gene therapy procedures, cancer treatments and other medical applications. She will also discuss technologies made possible by organizing small semiconductor particles called quantum dots, materials that exhibit a rich variety of phenomena that are size and shape dependent. Development of these new materials that harnesses the unique properties of materials at the 1-100 nanometer scale resulted in the new field of nanotechnology that currently affects many applications in technological and medical fields.

  9. Nanotechnology and textiles engineered by carbon nanotubes for the realization of advanced personal protective equipments

    SciTech Connect (OSTI)

    Andretta, Antonio; Terranova, Maria Letizia; Lavecchia, Teresa; Gay, Stefano; Tamburri, Emanuela; Picano, Alfredo; Mascioletti, Alessandro; Stirpe, Daniele; Dugnani, Giovanni; Gatti, Davide; Laria, Giuseppe; Codenotti, Barbara; Maldini, Giorgio; Roth, Siegmar; Passeri, Daniele; Rossi, Marco

    2014-06-19

    Carbon nanotubes (CNT) and CNT-based active materials have been used to assemble the gas sensing unit of innovative platforms able to detect toxic atmospheres developing in confined workplaces. The main goal of the project was to realize a full-featured, operator-friendly safety detection and monitoring system based on multifunctional textiles nanotechnologies. The fabricated sensing platform consists of a multiple gas detector coupled with a specifically designed telecommunication infrastructure. The portable device, totally integrated in the workwear, offers several advantages over the conventional safety tools employed in industrial work activities.

  10. "Nanotechnology Enabled Advanced Industrial Heat Transfer Fluids"

    SciTech Connect (OSTI)

    Dr. Ganesh Skandan; Dr. Amit Singhal; Mr. Kenneth Eberts; Mr. Damian Sobrevilla; Prof. Jerry Shan; Stephen Tse; Toby Rossmann

    2008-06-12

    ABSTRACT Nanotechnology Enabled Advanced industrial Heat Transfer Fluids Improving the efficiency of Industrial Heat Exchangers offers a great opportunity to improve overall process efficiencies in diverse industries such as pharmaceutical, materials manufacturing and food processing. The higher efficiencies can come in part from improved heat transfer during both cooling and heating of the material being processed. Additionally, there is great interest in enhancing the performance and reducing the weight of heat exchangers used in automotives in order to increase fuel efficiency. The goal of the Phase I program was to develop nanoparticle containing heat transfer fluids (e.g., antifreeze, water, silicone and hydrocarbon-based oils) that are used in transportation and in the chemical industry for heating, cooling and recovering waste heat. Much work has been done to date at investigating the potential use of nanoparticle-enhanced thermal fluids to improve heat transfer in heat exchangers. In most cases the effect in a commercial heat transfer fluid has been marginal at best. In the Phase I work, we demonstrated that the thermal conductivity, and hence heat transfer, of a fluid containing nanoparticles can be dramatically increased when subjected to an external influence. The increase in thermal conductivity was significantly larger than what is predicted by commonly used thermal models for two-phase materials. Additionally, the surface of the nanoparticles was engineered so as to have a minimal influence on the viscosity of the fluid. As a result, a nanoparticle-laden fluid was successfully developed that can lead to enhanced heat transfer in both industrial and automotive heat exchangers

  11. Center for Integrated Nanotechnologies 2011 Annual Report

    SciTech Connect (OSTI)

    Sanders, Antonya

    2012-06-21

    We are pleased to share with you this 2011 edition of the Annual Report from the Center for Integrated Nanotechnologies (CINT) and the growing excitement we feel around cementing our brand as a leader in integration nanoscience. This can be seen most readily in the momentum we have achieved in our signature Integration Focus Activities (IFAs). These efforts unite our scientists across our four scientific Thrust areas with our users to concentrate research on larger-scale nanoscience integration challenges for specific classes of nanomaterials, systems, and phenomena. All three of our current IFAs (p. 10) now have a full head of steam, and nearly 30% of our current user projects map in some meaningful way to one of these IFAs. As part of our redoubled effort to increase our industrial user base, we are also looking to leverage these IFAs to build a stronger link to and spur recruitment within our industrial user community. We believe that the IFAs are a natural community-building tool with an intrinsic value proposition for industry; an R&D pipeline that can lead to more mature, more commercially well-positioned technologies. Finally, as nanoscience and nanotechnology are maturing, we as a research community are beginning to see our efforts extend in many exciting new directions. Our focus on nanoscience integration positions us very well to capitalize on new opportunities including the emerging Mesoscale Initiative within the DOE Office of Science. Many aspects of mesoscale science are embodied in the integration of nanoscale building blocks. We are equally proud of our continuing strong performance in support of our user program. We have fully transitioned to our new user proposal database providing enhanced convenience and flexibility for proposal submission and review. In our two regular proposal calls this year we received a total of 225 proposals, an increase of 10% over our 2010 performance. Our official count on number of users for the period remains at

  12. Nanotechnology Energizing Our Future | U.S. DOE Office of Science...

    Office of Science (SC) Website

    Energy Needs: The Big Picture .ppt file (15.7MB) Patricia Dehmer, DOE Nanotechnology 101 .ppt file (7.6MB) Paul Alivisatos, LBNL Nanotechnology for the Hydrogen Economy .ppt file ...

  13. Potential impacts of nanotechnology on energy transmission applications and needs.

    SciTech Connect (OSTI)

    Elcock, D.; Environmental Science Division

    2007-11-30

    The application of nanotechnologies to energy transmission has the potential to significantly impact both the deployed transmission technologies and the need for additional development. This could be a factor in assessing environmental impacts of right-of-way (ROW) development and use. For example, some nanotechnology applications may produce materials (e.g., cables) that are much stronger per unit volume than existing materials, enabling reduced footprints for construction and maintenance of electricity transmission lines. Other applications, such as more efficient lighting, lighter-weight materials for vehicle construction, and smaller batteries having greater storage capacities may reduce the need for long-distance transport of energy, and possibly reduce the need for extensive future ROW development and many attendant environmental impacts. This report introduces the field of nanotechnology, describes some of the ways in which processes and products developed with or incorporating nanomaterials differ from traditional processes and products, and identifies some examples of how nanotechnology may be used to reduce potential ROW impacts. Potential environmental, safety, and health impacts are also discussed.

  14. Nanotechnology for the Forest Products Industry Vision and Technology Roadmap

    SciTech Connect (OSTI)

    Atalla, Rajai; Beecher, James; Caron, Robert; Catchmark, Jeffrey; Deng, Yulin; Glasser, Wolfgang; Gray, Derek; Haigler, Candace; Jones, Philip; Joyce, Margaret; Kohlman, Jane; Koukoulas, Alexander; Lancaster, Peter; Perine, Lori; Rodriguez, Augusto; Ragauskas, Arthur; Wegner, Theodore; Zhu, Junyong

    2005-03-01

    A roadmap for Nanotechnology in the Forest Products Industries has been developed under the umbrella of the Agenda 2020 program overseen by the CTO committee. It is expected that the use of new analytical techniques and methodologies will allow us to understand the complex nature of wood based materials and allow the dramatically enhanced use of the major strategic asset the US has in renewable, recyclable resources based on its well managed Forests.

  15. DOE Science Showcase - Nanotechnology | OSTI, US Dept of Energy Office of

    Office of Scientific and Technical Information (OSTI)

    Scientific and Technical Information Nanotechnology Nanotechnology has a vitally important role to play in addressing the nation's energy, climate change and national security challenges. DOE maintains a strong commitment to the initiative, which has served as an effective and valuable way to spotlight needs and target resources in this critical area of science and technology. Courtesy of Los Alamos National Laboratory Courtesy of Los Alamos National Laboratory Nanotechnology Research

  16. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2014 NERSC User Announcements RSS Feed June 30, 2014 by Richard Gerber NERSC's User Announcements (not these "Featured Announcements") are now available as an RSS feed. Point...

  17. Semiconductor Nanotechnology: Novel Materials and Devices for Electronics, Photonics, and Renewable Energy Applications

    SciTech Connect (OSTI)

    Goodnick, Stephen; Korkin, Anatoli; Krstic, Predrag S; Mascher, Peter; Preston, John; Zaslavsky, Alex

    2010-03-01

    Electronic and photonic information technology and renewable energy alternatives, such as solar energy, fuel cells and batteries, have now reached an advanced stage in their development. Cost-effective improvements to current technological approaches have made great progress, but certain challenges remain. As feature sizes of the latest generations of electronic devices are approaching atomic dimensions, circuit speeds are now being limited by interconnect bottlenecks. This has prompted innovations such as the introduction of new materials into microelectronics manufacturing at an unprecedented rate and alternative technologies to silicon CMOS architectures. Despite the environmental impact of conventional fossil fuel consumption, the low cost of these energy sources has been a long-standing economic barrier to the development of alternative and more efficient renewable energy sources, fuel cells and batteries. In the face of mounting environmental concerns, interest in such alternative energy sources has grown. It is now widely accepted that nanotechnology offers potential solutions for securing future progress in information and energy technologies. The Canadian Semiconductor Technology Conference (CSTC) forum was established 25 years ago in Ottawa as an important symbol of the intrinsic strength of the Canadian semiconductor research and development community, and the Canadian semiconductor industry as a whole. In 2007, the 13th CSTC was held in Montreal, moving for the first time outside the national capital region. The first three meetings in the series of Nano and Giga Challenges in Electronics and Photonics NGCM2002 in Moscow, NGCM2004 in Krakow, and NGC2007 in Phoenix were focused on interdisciplinary research from the fundamentals of materials science to the development of new system architectures. In 2009 NGC2009 and the 14th Canadian Semiconductor Technology Conference (CSTC2009) were held as a joint event, hosted by McMaster University (10 14 August

  18. Center for Integrated Nanotechnologies (CINT) | U.S. DOE Office of Science

    Office of Science (SC) Website

    (SC) Integrated Nanotechnologies (CINT) Scientific User Facilities (SUF) Division SUF Home About User Facilities X-Ray Light Sources Neutron Scattering Facilities Nanoscale Science Research Centers (NSRCs) Center for Functional Nanomaterials (CFN) Center for Integrated Nanotechnologies (CINT) Center for Nanophase Materials Sciences (CNMS) Center for Nanoscale Materials (CNM) The Molecular Foundry (TMF) Projects Accelerator & Detector Research Science Highlights Principal Investigators'

  19. ARM - Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    CenterFeatures Media Contact Hanna Goss hanna-dot-goss-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes117 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 7 ARM Mobile Facility 2 47 ARM Mobile Facility 3 1 BAECC 1 BBOP 4 CARES 1 Data Quality Office 2 ENA 2 GOAMAZON 7 HI-SCALE 4 LASIC 3 MAGIC 15 MC3E 17 PECAN 3 SGP 8 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases

  20. APPLICATIONS OF BIOTECHNOLOGY IN DEVELOPMENT OF BIOMATERIALS: NANOTECHNOLOGY AND BIOFILMS

    SciTech Connect (OSTI)

    Brigmon, R.; Berry, T.; Narayan, R.

    2010-11-29

    Biotechnology is the application of biological techniques to develop new tools and products for medicine and industry. Due to various properties including chemical stability, biocompatibility, and specific activity, e.g. antimicrobial properties, many new and novel materials are being investigated for use in biosensing, drug delivery, hemodialysis, and other medical applications. Many of these materials are less than 100 nanometers in size. Nanotechnology is the engineering discipline encompassing designing, producing, testing, and using structures and devices less than 100 nanometers. One of the challenges associated with biomaterials is microbial contamination that can lead to infections. In recent work we have examined the functionalization of nanoporous biomaterials and antimicrobial activities of nanocrystalline diamond materials. In vitro testing has revealed little antimicrobial activity against Pseudomonas fluorescens bacteria and associated biofilm formation that enhances recalcitrance to antimicrobial agents including disinfectants and antibiotics. Laser scanning confocal microscopy studies further demonstrated properties and characteristics of the material with regard to biofilm formation.

  1. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2014 Nobel Lecture Videos Now Available Online May 29, 2014 by Kathy Kincade Three of the NERSC Nobel Lecture Series videos -- featuring John Kuriyan, Warren Washington, George Smoot, and Saul Perlmutter -- are now available for viewing. Read the full post Xeon Phi Nationwide training sessions available from Intel May 7, 2014 by Katie Antypas NERSC's next supercomputer, Cori, will using the Xeon Phi processor architecture. In order to achieve high performance on Xeon Phi, users will need to

  2. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    January 2014 NERSC's 40th Anniversary Kicks Off with a Special User Group Meeting January 15, 2014 by Francesca Verdier Registration is now open for NUG 2014, the annual meeting of the NERSC Users' Group, Feb. 3-6, 2014. This year's NUG meeting is special, it kicks off NERSC's 40th anniversary celebration. The highlight of NUG 2014 is a two-day "Celebration of Science and Technology" featuring talks by Berkeley Lab's Horst Simon and Kathy Yelick, NERSC Director Sudip Dosanjh, prominent

  3. Argonne Creates Collaborative Centers to Connect Business with Energy Storage, Nanotechnology Research

    Broader source: Energy.gov [DOE]

    Energy storage and nanotechnology have the potential to transform the way we look at clean energy. Advances in energy storage research will revolutionize the way the world generates and stores...

  4. NREL Nano-Technology Solar Cell Achieves 18.2% Efficiency - News Releases |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NREL Nano-Technology Solar Cell Achieves 18.2% Efficiency Breakthrough should eliminate need for anti-reflection layer, cutting costs October 12, 2012 Scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have produced solar cells using nanotechnology techniques at an efficiency - 18.2% -- that is competitive. The breakthrough should be a major step toward helping lower the cost of solar energy. NREL tailored a nanostructured surface while ensuring that

  5. Developing nanotechnology for biofuel and plant science applications

    SciTech Connect (OSTI)

    Valenstein, Justin

    2012-06-20

    This dissertation presents the research on the development of mesoporous silica based nanotechnology for applications in biofuels and plant science. Mesoporous silica nanoparticles (MSNs) have been the subject of great interest in the last two decades due to their unique properties of high surface area, tunable pore size and particle morphology. The robust nature of the silica framework is easily functionalized to make the MSNs a promising option for selective separations. Also, the independent channels that form the pores of MSN have been exploited in the use of particles as platforms for molecular delivery. Pore size and organic functionality are varied to identify the ideal adsorbent material for free fatty acids (FFAs). The resulting material is able to sequester FFAs with a high degree of selectivity from a simulated solution and microalgal oil. The recyclability and industrial implications are also explored. A continuation of the previous material, further tuning of MSN pore size was investigated. Particles with a smaller diameter selectively sequester polyunsaturated free fatty acids (PUFAs) over monounsaturated FFAs and saturated FFAs. The experimental results were verified with molecular modeling. Mesoporous silica nanoparticle materials with a pore diameter of 10 nm (MSN-10) were decorated with small gold nanoparticles. The resulting materials were shown to deliver proteins and DNA into plant cells using the biolistic method.

  6. Nanotechnology and algae biofuels exhibits open July 26 at the Bradbury

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Science Museum Nanotechnology and algae biofuels exhibits open July 26 Nanotechnology and algae biofuels exhibits open July 26 at the Bradbury Science Museum The Bradbury Science Museum is opening two new exhibits as part of the Laboratory's 70th Anniversary celebration. July 22, 2013 What if you could power your life using pond scum? Los Alamos researchers are working to make this a reality. What if you could power your life using pond scum? Los Alamos researchers are working to make this a

  7. Connecticut State University System Initiative for Nanotechnology-Related Equipment, Faculty Development and Curriculum Development

    SciTech Connect (OSTI)

    Broadbridge, Christine C.

    2013-03-28

    DOE grant used for partial fulfillment of necessary laboratory equipment for course enrichment and new graduate programs in nanotechnology at the four institutions of the Connecticut State University System (CSUS). Equipment in this initial phase included variable pressure scanning electron microscope with energy dispersive x-ray spectroscopy elemental analysis capability [at Southern Connecticut State University]; power x-ray diffractometer [at Central Connecticut State University]; a spectrophotometer and spectrofluorimeter [at Eastern Connecticut State University; and a Raman Spectrometer [at Western Connecticut State University]. DOE's funding was allocated for purchase and installation of this scientific equipment and instrumentation. Subsequently, DOE funding was allocated to fund the curriculum, faculty development and travel necessary to continue development and implementation of the System's Graduate Certificate in Nanotechnology (GCNT) program and the ConnSCU Nanotechnology Center (ConnSCU-NC) at Southern Connecticut State University. All of the established outcomes have been successfully achieved. The courses and structure of the GCNT program have been determined and the program will be completely implemented in the fall of 2013. The instrumentation has been purchased, installed and has been utilized at each campus for the implementation of the nanotechnology courses, CSUS GCNT and the ConnSCU-NC. Additional outcomes for this grant include curriculum development for non-majors as well as faculty and student research.

  8. Nanotechnology Energizing Our Future | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Presentations » Nanotechnology Energizing Our Future Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) Community Resources Program Summaries Brochures Reports Accomplishments Presentations BES and Congress Science for Energy Flow Seeing Matter Nano for Energy Scale of Things Chart Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000

  9. Nanotechnology applications to desalination : a report for the joint water reuse & desalination task force.

    SciTech Connect (OSTI)

    Brady, Patrick Vane; Mayer, Tom; Cygan, Randall Timothy

    2011-01-01

    Nanomaterials and nanotechnology methods have been an integral part of international research over the past decade. Because many traditional water treatment technologies (e.g. membrane filtration, biofouling, scale inhibition, etc.) depend on nanoscale processes, it is reasonable to expect one outcome of nanotechnology research to be better, nano-engineered water treatment approaches. The most immediate, and possibly greatest, impact of nanotechnology on desalination methods will likely be the development of membranes engineered at the near-molecular level. Aquaporin proteins that channel water across cell membranes with very low energy inputs point to the potential for dramatically improved performance. Aquaporin-laced polymer membranes and aquaporin-mimicking carbon nanotubes and metal oxide membranes developed in the lab support this. A critical limitation to widespread use of nanoengineered desalination membranes will be their scalability to industrial fabrication processes. Subsequent, long-term improvements in nanoengineered membranes may result in self-healing membranes that ideally are (1) more resistant to biofouling, (2) have biocidal properties, and/or (3) selectively target trace contaminants.

  10. Potential nanotechnology applications for reducing freshwater consumption at coal fired power plants : an early view.

    SciTech Connect (OSTI)

    Elcock, D.

    2010-09-17

    This report was funded by the U.S. Department of Energy's (DOE's) National Energy Technology Laboratory (NETL) Existing Plants Research Program, which has an energy-water research effort that focuses on water use at power plants. This study complements the overall research effort of the Existing Plants Research Program by evaluating water issues that could impact power plants. A growing challenge to the economic production of electricity from coal-fired power plants is the demand for freshwater, particularly in light of the projected trends for increasing demands and decreasing supplies of freshwater. Nanotechnology uses the unique chemical, physical, and biological properties that are associated with materials at the nanoscale to create and use materials, devices, and systems with new functions and properties. It is possible that nanotechnology may open the door to a variety of potentially interesting ways to reduce freshwater consumption at power plants. This report provides an overview of how applications of nanotechnology could potentially help reduce freshwater use at coal-fired power plants. It was developed by (1) identifying areas within a coal-fired power plant's operations where freshwater use occurs and could possibly be reduced, (2) conducting a literature review to identify potential applications of nanotechnology for facilitating such reductions, and (3) collecting additional information on potential applications from researchers and companies to clarify or expand on information obtained from the literature. Opportunities, areas, and processes for reducing freshwater use in coal-fired power plants considered in this report include the use of nontraditional waters in process and cooling water systems, carbon capture alternatives, more efficient processes for removing sulfur dioxide and nitrogen oxides, coolants that have higher thermal conductivities than water alone, energy storage options, and a variety of plant inefficiencies, which, if improved

  11. In the OSTI Collections: Nanotechnology | OSTI, US Dept of Energy Office of

    Office of Scientific and Technical Information (OSTI)

    Scientific and Technical Information Nanotechnology Consider how far it is from New York to Los Angeles. Now compare that distance to the length of the "l" in "Angeles". That's roughly how one meter compares to one nanometer. A nanometer-one billionth of a meter-is a very small distance almost any way you look at it. One nanometer is about six times the width of a carbon atom. Distances of tens of nanometers are barely significant in much present-day technology, in which

  12. Integrated nanotechnology platform for tumor-targeted multimodal imaging and therapeutic cargo release

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hosoya, Hitomi; Dobroff, Andrey S.; Driessen, Wouter H. P.; Cristini, Vittorio; Brinker, Lina M.; Staquicini, Fernanda I.; Cardó-Vila, Marina; D’Angelo, Sara; Ferrara, Fortunato; Proneth, Bettina; et al

    2016-02-02

    A major challenge of targeted molecular imaging and drug delivery in cancer is establishing a functional combination of ligand-directed cargo with a triggered release system. Here we develop a hydrogel-based nanotechnology platform that integrates tumor targeting, photon-to-heat conversion, and triggered drug delivery within a single nanostructure to enable multimodal imaging and controlled release of therapeutic cargo. In proof-of-concept experiments, we show a broad range of ligand peptide-based applications with phage particles, heat-sensitive liposomes, or mesoporous silica nanoparticles that self-assemble into a hydrogel for tumor-targeted drug delivery. Because nanoparticles pack densely within the nanocarrier, their surface plasmon resonance shifts to near-infrared,more » thereby enabling a laser-mediated photothermal mechanism of cargo release. We demonstrate both noninvasive imaging and targeted drug delivery in preclinical mouse models of breast and prostate cancer. Finally, we applied mathematical modeling to predict and confirm tumor targeting and drug delivery. We conclude that these results are meaningful steps toward the design and initial translation of an enabling nanotechnology platform with potential for broad clinical applications.« less

  13. Scaling to Nanotechnology Limits with the PIMS Computer Architecture and a new Scaling Rule.

    SciTech Connect (OSTI)

    Debenedictis, Erik

    2015-02-01

    We describe a new approach to computing that moves towards the limits of nanotechnology using a newly formulated sc aling rule. This is in contrast to the current computer industry scali ng away from von Neumann's original computer at the rate of Moore's Law. We extend Moore's Law to 3D, which l eads generally to architectures that integrate logic and memory. To keep pow er dissipation cons tant through a 2D surface of the 3D structure requires using adiabatic principles. We call our newly proposed architecture Processor In Memory and Storage (PIMS). We propose a new computational model that integrates processing and memory into "tiles" that comprise logic, memory/storage, and communications functions. Since the programming model will be relatively stable as a system scales, programs repr esented by tiles could be executed in a PIMS system built with today's technology or could become the "schematic diagram" for implementation in an ultimate 3D nanotechnology of the future. We build a systems software approach that offers advantages over and above the technological and arch itectural advantages. Firs t, the algorithms may be more efficient in the conventional sens e of having fewer steps. Second, the algorithms may run with higher power efficiency per operation by being a better match for the adiabatic scaling ru le. The performance analysis based on demonstrated ideas in physical science suggests 80,000 x improvement in cost per operation for the (arguably) gene ral purpose function of emulating neurons in Deep Learning.

  14. DVU Featured Training & Events ...

    Broader source: Energy.gov (indexed) [DOE]

    Featured Training & Events Form Please complete this form in its entirety and email to ... Classroom, Online) 8. Course Location: Training Facility Address, Room City & State : ...

  15. Hopper Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Announcements Hopper Featured Announcements Hopper OS upgrade and new SW set to default next Wed, Feb 27 February 21, 2013 by Helen He | 0 Comments 1) There will be a scheduled...

  16. Hopper Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2012 Cluster Compatibility Mode is now available on Hopper April 10, 2012 We are pleased to announce a new feature on Hopper, Cray Cluster Compatibility Mode (CCM) which...

  17. Feature Characterization Library

    Energy Science and Technology Software Center (OSTI)

    2006-08-03

    FCLib is a data analysis toolkit constructed to meet the needs of data discovery in large-scale, spatio-temporal data such as finite element simulation data. FCLib is a C library toolkit of building blocks that can be assembled into complex analyses. Important features of FCLib include the following: (1) Support of feature-based analysis, (2) minimization of low-oevel processing, (3) ease of use, and (4) applicable to the wide variety of science domains.

  18. Community Feature Stories

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Community Feature Stories Community Feature Stories Our good neighbor pledge: to contribute to quality of life in Northern New Mexico through economic development, excellence in education, and active employee engagement in our communities. Northern New Mexico Micro Grape Growers Association Grape Growers Association enlivens agriculture Growers association unites small parcels of land, enlivens production, protects water rights for Northern New Mexico agriculturists. - 8/6/12 Jacob Leyba,

  19. 2009 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2009 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2009 New Labs to Concentrate on Solar Thermal Energy New Labs to Concentrate on Solar Thermal Energy DOE funds facilities to advance concentrating solar power technologies; global capacity could reach 20 gigawatts by 2020. NREL Works with Truckers to Reduce Fuel Use NREL Works with Truckers to Reduce Fuel Use Excessive

  20. 2011 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2011 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2011 Retailers Checking 'Nice' on Energy Savings List Retailers Checking 'Nice' on Energy Savings List NREL is working with the nation's commercial building owners to discover new and innovative ways to reduce energy use. Tiny Solar Cell Could Make a Big Difference Tiny Solar Cell Could Make a Big Difference Semprius is

  1. 2013 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2013 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2013 New Test Facility to Improve Wind Turbines New Test Facility to Improve Wind Turbines Five-megawatt dynamometer will accelerate the development of next-generation wind energy technologies. Bright Ideas Chase Investor Dollars at Forum Bright Ideas Chase Investor Dollars at Forum Annual Industry Growth Forum

  2. 2015 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2015 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2015 Inventive Thinkers at NREL Reach Record Number Inventive Thinkers at NREL Reach Record Number Researchers register ideas on everything from wave power to methane use. NREL's Min Zhang Keeps Her "Bugs" Happy, Leading to Biofuel Breakthroughs NREL's Min Zhang Keeps Her "Bugs" Happy, Leading to

  3. Enhancing Graduate Student Communication to General Audiences through Blogging about Nanotechnology and Sustainability

    SciTech Connect (OSTI)

    Bishop, Lee M.; Tillman, Ayesha S.; Geiger, Franz M.; Haynes, Christy L.; Klaper, Rebecca D.; Murphy, Catherine; Orr, Galya; Pedersen, Joel A.; DeStefano, Lizanne; Hamers, Robert J.

    2014-10-14

    We have developed and assessed a multiauthor science blog on the topic of nanotechnology and sustainability as a tool to improve the written communication and public engagement skills of graduate students. Focus group studies revealed that after participation in the blog, student authors felt more confident and capable of communicating technical topics to general audiences. Students' research mentors viewed this as an important component of their students' education, as indicated by survey data. Important design aspects of this effort include participation of an editor as well as having flexible content and target-audience guidelines. We have explicitly outlined aspects of the effort we see as critical in order to enable others to replicate this model in related settings.

  4. 2012 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2012 Feature Stories The following feature stories take an in-depth, behind-the-scenes look at how NREL is advancing energy efficiency and renewable energy technologies. December 2012 Award-Winning PV Cell Pushes Efficiency Higher Award-Winning PV Cell Pushes Efficiency Higher NREL and Solar Junction outsmart the solar spectrum and set a world record with a 44%-efficient solar cell. Award-Winning A/C Uses Old Idea, New Materials Award-Winning A/C Uses Old Idea, New Materials NREL's DEVAP cooling

  5. Intrinsic Feature Motion Tracking

    Energy Science and Technology Software Center (OSTI)

    2013-03-19

    Subject motion during 3D medical scanning can cause blurring and artifacts in the 3D images resulting in either rescans or poor diagnosis. Anesthesia or physical restraints may be used to eliminate motion but are undesirable and can affect results. This software measures the six degree of freedom 3D motion of the subject during the scan under a rigidity assumption using only the intrinsic features present on the subject area being monitored. This movement over timemore » can then be used to correct the scan data removing the blur and artifacts. The software acquires images from external cameras or images stored on disk for processing. The images are from two or three calibrated cameras in a stereo arrangement. Algorithms extract and track the features over time and calculate position and orientation changes relative to an initial position. Output is the 3D position and orientation change measured at each image.« less

  6. Featured Topic Pages

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured Topic Pages * Renowned scientists, with information about the scientists' R&D results * Significant DOE research disciplines, with R&D results * Manhattan Project, including scientists and key events Laureates * Nobel Prize winners associated with DOE and predecessor agencies * Winners of the Enrico Fermi Award, a U.S. Presidential award Database * Selected documents about noteworthy R&D results * Documents and individual pages searchable by word or phrase * Tag cloud

  7. Hopper Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Announcements Hopper Featured Announcements Hopper OS upgrade and new SW set to default next Wed, Feb 27 February 21, 2013 by Helen He 1) There will be a scheduled hardware and software maintenance for Hopper next Wednesday, February 27, from 7 am to 7 pm Pacific time. This is a major OS upgrade. Most applications are highly recommended to recompile (or at least relink) after the maintenance. C++ and PGAS applications are recommended to recompile and relink. Please plan your work accordingly and

  8. Hopper Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2012 Cluster Compatibility Mode is now available on Hopper April 10, 2012 We are pleased to announce a new feature on Hopper, Cray Cluster Compatibility Mode (CCM) which allows applications that previously could only run on Carver to run on Hopper. Cluster Compatibility Mode (CCM) is a Cray software solution that provides services needed to run most cluster-based independent software vendor (ISV) applications on the Cray XE6. It supports the standard Linux services, such as ssh, rsh, nscd,

  9. Application of an Informatics-Based Decision-Making Framework and Process to the Assessment of Radiation Safety in Nanotechnology

    SciTech Connect (OSTI)

    Hoover, Mark D.; Myers, David S.; Cash, Leigh J.; Guilmette, Raymond A.; Kreyling, Wolfgang G.; Oberdörster, Günter; Smith, Rachel; Cassata, James R.; Boecker, Bruce B.; Grissom, Michael P.

    2015-01-01

    The National Council on Radiation Protection and Measurements (NCRP) has established NCRP Scientific Committee 2-6 to develop a report on the current state of knowledge and guidance for radiation safety programs involved with nanotechnology. Nanotechnology is the understanding and control of matter at the nanoscale, at dimensions between approximately 1 and 100 nanometers, where unique phenomena enable novel applications. While the full report is in preparation, this article presents and applies an informatics-based decision-making framework and process through which the radiation protection community can anticipate that nano-enabled applications, processes, nanomaterials, and nanoparticles are likely to become present or are already present in radiation-related activities; recognize specific situations where environmental and worker safety, health, well-being, and productivity may be affected by nano-related activities; evaluate how radiation protection practices may need to be altered to improve protection; control information, interpretations, assumptions, and conclusions to implement scientifically sound decisions and actions; and confirm that desired protection outcomes have been achieved. This generally applicable framework and supporting process can be continuously applied to achieve health and safety at the convergence of nanotechnology and radiation-related activities.

  10. Application of an Informatics-Based Decision-Making Framework and Process to the Assessment of Radiation Safety in Nanotechnology

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hoover, Mark D.; Myers, David S.; Cash, Leigh J.; Guilmette, Raymond A.; Kreyling, Wolfgang G.; Oberdörster, Günter; Smith, Rachel; Cassata, James R.; Boecker, Bruce B.; Grissom, Michael P.

    2015-01-01

    The National Council on Radiation Protection and Measurements (NCRP) has established NCRP Scientific Committee 2-6 to develop a report on the current state of knowledge and guidance for radiation safety programs involved with nanotechnology. Nanotechnology is the understanding and control of matter at the nanoscale, at dimensions between approximately 1 and 100 nanometers, where unique phenomena enable novel applications. While the full report is in preparation, this article presents and applies an informatics-based decision-making framework and process through which the radiation protection community can anticipate that nano-enabled applications, processes, nanomaterials, and nanoparticles are likely to become present or are alreadymore » present in radiation-related activities; recognize specific situations where environmental and worker safety, health, well-being, and productivity may be affected by nano-related activities; evaluate how radiation protection practices may need to be altered to improve protection; control information, interpretations, assumptions, and conclusions to implement scientifically sound decisions and actions; and confirm that desired protection outcomes have been achieved. This generally applicable framework and supporting process can be continuously applied to achieve health and safety at the convergence of nanotechnology and radiation-related activities.« less

  11. qFeature

    SciTech Connect (OSTI)

    2015-09-14

    This package contains statistical routines for extracting features from multivariate time-series data which can then be used for subsequent multivariate statistical analysis to identify patterns and anomalous behavior. It calculates local linear or quadratic regression model fits to moving windows for each series and then summarizes the model coefficients across user-defined time intervals for each series. These methods are domain agnostic?but they have been successfully applied to a variety of domains, including commercial aviation and electric power grid data.

  12. qFeature

    Energy Science and Technology Software Center (OSTI)

    2015-09-14

    This package contains statistical routines for extracting features from multivariate time-series data which can then be used for subsequent multivariate statistical analysis to identify patterns and anomalous behavior. It calculates local linear or quadratic regression model fits to moving windows for each series and then summarizes the model coefficients across user-defined time intervals for each series. These methods are domain agnostic—but they have been successfully applied to a variety of domains, including commercial aviation andmore » electric power grid data.« less

  13. Recursive Feature Extraction in Graphs

    Energy Science and Technology Software Center (OSTI)

    2014-08-14

    ReFeX extracts recursive topological features from graph data. The input is a graph as a csv file and the output is a csv file containing feature values for each node in the graph. The features are based on topological counts in the neighborhoods of each nodes, as well as recursive summaries of neighbors' features.

  14. Micro- & Nano-Technology: A Critical Design Key in Advanced Thermoelectric Cooling Systems

    SciTech Connect (OSTI)

    Hendricks, Terry J.; Karri, Naveen K.

    2009-07-01

    Advanced, thermoelectric cooling technologies now are receiving more research attention to provide cooling in advanced vehicles and residential systems to assist in increasing overall system energy efficiency and reduce greenhouse gas impacts from leakage by current R-134a systems. This work explores the systems-related impacts, barriers, and challenges of using micro-technology solutions integrated with advances in nano-scale thermoelectric materials in advanced TE cooling systems. Integrated system-level analyses that simultaneously account for thermal energy transport into / dissipation out of the TE device, environmental effects, temperature-dependent TE and thermo-physical properties, thermal losses, and thermal and electrical contact resistances are presented to establish accurate optimum system designs using both BixSb2-xTe3 / Bi2Te3 TE systems and Bi2Te3 TE systems. This work established the design trends and identified optimum design regimes and metrics for these types of systems that will minimize system mass, volume and cost to maximize their commercialization potential in vehicular and residential applications. The relationships between important design metrics, like coefficient of performance, specific cooling capacity and cooling heat flux requirements, upper limits, and critical differences in these metrics in BixSb2-xTe3 / Bi2Te3 TE systems and Bi2Te3 TE systems are explored and quantified. Finally, the work discusses the critical role that micro-technologies and nano-technologies can play in enabling miniature TE cooling systems in advanced vehicle and residential applications and gives some key relevant examples.

  15. Newsletter Features | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Newsletter Features Newsletter Features Below are featured articles from the Indian Energy Beat newsletter. Download full issues of the newsletter. October 22, 2015 Leading the Charge: Doug MacCourt Advises Tribes on Energy Policy Leading the Charge is a regular feature spotlighting the movers and shakers in energy development on tribal lands. October 22, 2015 Winning the Future: Navajo-Hopi Land Commission Leverages DOE Grant to Advance Solar Ranch Project Under the Navajo-Hopi Land Settlement

  16. Design of Roadside Safety Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Analysis and Design of the Roadside Safety Features for Safety Performance Texas Transportation Institute (TTI) researchers are investigating the performance of a crash wall design ...

  17. Where Are We Heading in Nanotechnology Environmental Health and Safety and Materials Characterization?

    SciTech Connect (OSTI)

    Nel, Andre; Parak, Wolfgang J.; Chan, Warren C.; Xia, Tian; Hersam, Mark C.; Brinker, C. J.; Zink, Jeffery I.; Pinkerton, Kent E.; Baer, Donald R.; Weiss, Paul S.

    2015-06-23

    Every chemist, material scientist, physicist, engineer, or commercial enterprise involved in the synthesis and/or production of engineered nanomaterials (ENM) or nano-enabled products aspires to develop safe materials. Nanotechnology environmental health and safety (nanoEHS) is a research discipline that involves the study of the possible adverse health and biological effects that nanomaterials may have on humans and environmental organisms and ecosystems. NanoEHS research has provided a body of experimental evidence indicating the possibility of hazardous outcomes as a result of the interactions of unique ENM physicochemical properties with similar scale processes occurring at a wide range of nano/bio interfaces, including at biomolecular, cellular, subcellular, organ, systemic, whole organism, or ecosystems levels. This projected hazard and risk potential warrants rigorous attention to safety assessment, safe use, safe implementation, benign design, regulatory oversight, governance, and public awareness to address the possibility and prevention of nanotoxicity, now or at any time in the future.1 Thus, we should understand the properties of the ENMs that are responsible for the toxicological response, so that we can re-engineer their physicochemical characteristics for risk prevention and safer ENM design.2 However, in spite of widespread use, no human toxicological disease or major environmental impact has been reported for ENMs. Thus, while “Nanotoxicology” is a thriving sub-discipline of Nano-EHS, the use of the “root” word toxicology may elicit a feeling that nanomaterials are inherently toxic despite the fact that toxicity has not been established in real-life use so far. As a community, we may want to rename this sub-discipline as “Nanosafety,” since the objective is to use toxicology information to guide the design of safer nanomaterials for use in medicine, biology, electronics, lighting systems, etc. At ACS Nano, we are interested in

  18. 1999 Commercial Buildings Characteristics--Conservation Features...

    U.S. Energy Information Administration (EIA) Indexed Site

    Conservation Features and Practices Topics: Energy Sources and End Uses End-Use Equipment Conservation Features and Practices Conservation Features and Practices The 1999 CBECS...

  19. DOE - NNSA/NFO -- Featured Items

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured Items includeslanguage.htm Featured Items The Nevada Field Office Featured Items section provides quick access to brief program updates and some of the more popular new ...

  20. The MCLIB library: New features

    SciTech Connect (OSTI)

    Seeger, P.A.

    1996-12-31

    This report describes the philosophy and structure of MCLIB, A Fortran library of Monte Carlo subroutines which has been developed to test designs of neutron scattering instruments. Emphasis is placed on new features added to the library since the previous presentation of MCLIB at ICANS-XIII in October, 1995. These new features include toroidal mirrors, writing and reading source files, splitting and banking of histories, and a Maxwellian probability distribution. The only change of a program structure has been to include charge and polarization vector in the description of a particle. The latest release of the source code and documentation may be obtained by anonymous ftp. Work is also continuing on a more friendly web-based user interface, and user input is requested for additional features to be added to the library.

  1. ARM - Features and Releases Archive

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    CenterFeaturesFeatures and Releases Archive Media Contact Hanna Goss hanna-dot-goss-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes117 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 7 ARM Mobile Facility 2 47 ARM Mobile Facility 3 1 BAECC 1 BBOP 4 CARES 1 Data Quality Office 2 ENA 2 GOAMAZON 7 HI-SCALE 4 LASIC 3 MAGIC 15 MC3E 17 PECAN 3 SGP 8 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All

  2. Alternative Fuels Data Center: News and Features

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    News and Features to someone by E-mail Share Alternative Fuels Data Center: News and Features on Facebook Tweet about Alternative Fuels Data Center: News and Features on Twitter Bookmark Alternative Fuels Data Center: News and Features on Google Bookmark Alternative Fuels Data Center: News and Features on Delicious Rank Alternative Fuels Data Center: News and Features on Digg Find More places to share Alternative Fuels Data Center: News and Features on AddThis.com... More in this section...

  3. Feature Stories | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Feature Stories Topic - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial

  4. Feature Stories | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Feature Stories Topic - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial

  5. Feature Stories | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Feature Stories Topic - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial

  6. NIF featured on BBC "Horizon"

    SciTech Connect (OSTI)

    Brian Cox

    2010-01-12

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  7. NIF featured on BBC "Horizon"

    ScienceCinema (OSTI)

    Brian Cox

    2010-09-01

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  8. Feature Stories | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Feature Stories Ames Laboratory Scientists Leave Their Mark on Future Researchers Eight out of the past 10 years, Ames Laboratory chemist Aaron Sadow has mentored a Science Undergraduate Laboratory Internships (SULI) student. Sometimes the mentorship has been for the 10-week summer program and sometimes for the 16-week semester program. On occasion, he's mentored more than one student at a time. READ MORE Solving the Biomass Puzzle Biomass holds great promise as a petroleum replacement, but

  9. VOLTTRON Technical Overview and Features

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    VOLTTRON Technical Overview and Features BRANDON CARPENTER JEREME HAACK Pacific Northwest National Laboratory DOE Building Technologies Office: Technical Meeting on Software Framework for Transactive Energy July 23-24, 2014 July 29, 2014 1 2 Presentation Outline Platform Details Platform Services Agent Development Future Plans Platform Components 3 Technical Details Code is open source and available on github https://github.com/VOLTTRON/volttron/ Linux as target platform Designed to run on small

  10. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Magazine Features Mobile Facility Deployment In China Bookmark and Share A news feature published in Vol. 461 of Nature magazine covers the ARM Mobile Facility deployment in China. ...

  11. Sustainable Transportation and National Parks Initiative Featured...

    Energy Savers [EERE]

    Sustainable Transportation and National Parks Initiative Featured in Magazine Sustainable Transportation and National Parks Initiative Featured in Magazine October 18, 2013 - ...

  12. PHISICS: New Features and Advancements

    SciTech Connect (OSTI)

    C. Rabiti; Y. Wang; G. Palmiotti; H. Hiruta; J. Cogliati; A. Alfonsi; A. EPiney; T. Grimmett

    2011-06-01

    The PHISICS (Parallel and Highly Innovative Simulation for INL Code System) software is under an intensive development at INL. In the last months new features have been added and improvements of the previously existing one performed. The modular approach has created a friendly development environment that allows a quick expansion of the capabilities. In the last months a little amount of work has been dedicated to the improvement of the spherical harmonics based nodal transport solver while the implementation of a solver based on the self adjoint formulation of the discrete ordinate is in the test phase on structured mesh. PHISICS now include a depletion solver with the option to use two different algorithms for the solution of the Bateman equation: the Taylor development of the exponential matrix and the Chebyshev Rational Approximation Method. The coupling with RELAP5 is also available at least in the steady state search mode. The coupling between RELAP5 and PHISICS can also take advantage of the new cross section interpolation module so that the coupling could be performed using an arbitrary number of energy groups.

  13. @ work' video segment features Robotic Software Engineer

    ScienceCinema (OSTI)

    Idaho National Laboratory

    2010-01-08

    @ work highlights Idaho National Laboratory employees and the jobs they perform.This segment features Robotic Software Engineer Miles Walton.

  14. @ work' video segment features Robotic Software Engineer

    SciTech Connect (OSTI)

    Idaho National Laboratory

    2008-03-27

    @ work highlights Idaho National Laboratory employees and the jobs they perform.This segment features Robotic Software Engineer Miles Walton.

  15. Approaches to Safe Nanotechnology

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... How- ever, since this approach relies primarily on static or area sampling, some ... Environ Health Perspect 114(1):51-58. Fuchs NA 1964. The mechanics of aerosols. Ox- ...

  16. Satellite stories featured in Lab lecture series

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Satellite stories featured Satellite stories featured in Lab lecture series Space adventures will be featured in the upcoming Frontiers in Science lecture series "Small Satellites on a Shoestring: The LANL Experience." February 14, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new

  17. Composite, ordered material having sharp surface features

    DOE Patents [OSTI]

    D'Urso, Brian R.; Simpson, John T.

    2006-12-19

    A composite material having sharp surface features includes a recessive phase and a protrusive phase, the recessive phase having a higher susceptibility to a preselected etchant than the protrusive phase, the composite material having an etched surface wherein the protrusive phase protrudes from the surface to form a sharp surface feature. The sharp surface features can be coated to make the surface super-hydrophobic.

  18. Flexible feature interface for multimedia sources

    DOE Patents [OSTI]

    Coffland, Douglas R.

    2009-06-09

    A flexible feature interface for multimedia sources system that includes a single interface for the addition of features and functions to multimedia sources and for accessing those features and functions from remote hosts. The interface utilizes the export statement: export "C" D11Export void FunctionName(int argc, char ** argv,char * result, SecureSession *ctrl) or the binary equivalent of the export statement.

  19. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2, 2006 Feature Stories and Releases Synchronized Flights by U.S. and International Research Aircraft Reveal Intriguing Information about Ice Particles in Clouds Bookmark and...

  20. LC-IMS-MS Feature Finder

    SciTech Connect (OSTI)

    2013-03-07

    LC-IMS-MS Feature Finder is a command line software application which searches for possible molecular ion signatures in multidimensional liquid chromatography, ion mobility spectrometry, and mass spectrometry data by clustering deisotoped peaks with similar monoisotopic mass values, charge states, elution times, and drift times. The software application includes an algorithm for detecting multiple conformations and co-eluting species in the ion mobility dimension. LC-IMS-MS Feature Finder is designed to create an output file with detected features that includes associated information about the detected features.

  1. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 11, 2009 Feature Stories and Releases Open House Draws Crowd to ARM Climate Research Facility Display Bookmark and Share Mild summer temperatures helped bring thousands...

  2. LC-IMS-MS Feature Finder

    Energy Science and Technology Software Center (OSTI)

    2013-03-07

    LC-IMS-MS Feature Finder is a command line software application which searches for possible molecular ion signatures in multidimensional liquid chromatography, ion mobility spectrometry, and mass spectrometry data by clustering deisotoped peaks with similar monoisotopic mass values, charge states, elution times, and drift times. The software application includes an algorithm for detecting multiple conformations and co-eluting species in the ion mobility dimension. LC-IMS-MS Feature Finder is designed to create an output file with detected features thatmore » includes associated information about the detected features.« less

  3. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    26, 2013 Facility News, Feature Stories and Releases Climate Data Now Flowing from Oliktok, Alaska Bookmark and Share New climate observatory records atmospheric measurements at...

  4. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 25, 2015 Facility News, Feature Stories and Releases Nature Article: Carbon Dioxide's Greenhouse Effect at Earth's Surface Confirmed Using ARM Data Bookmark and Share...

  5. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The new design provides a fresh look, easier navigation, and great new learning activities, but still features the familiar faces of Professor Polar Bear, Teacher Turtle, and PI ...

  6. Exploring quantum control landscapes: Topology, features, and...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Exploring quantum control landscapes: Topology, features, and optimization scaling Citation Details In-Document Search Title: Exploring quantum control landscapes: ...

  7. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 26, 2012 Feature Stories and Releases Capturing Aerosol Evolution at Cape Cod Bookmark and Share From July 2012 to June 2013, nearly sixty instruments are obtaining...

  8. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features...

  9. Image fusion using sparse overcomplete feature dictionaries

    SciTech Connect (OSTI)

    Brumby, Steven P.; Bettencourt, Luis; Kenyon, Garrett T.; Chartrand, Rick; Wohlberg, Brendt

    2015-10-06

    Approaches for deciding what individuals in a population of visual system "neurons" are looking for using sparse overcomplete feature dictionaries are provided. A sparse overcomplete feature dictionary may be learned for an image dataset and a local sparse representation of the image dataset may be built using the learned feature dictionary. A local maximum pooling operation may be applied on the local sparse representation to produce a translation-tolerant representation of the image dataset. An object may then be classified and/or clustered within the translation-tolerant representation of the image dataset using a supervised classification algorithm and/or an unsupervised clustering algorithm.

  10. Nature Climate Change features Los Alamos forest research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nature Climate Change Features Forest Research Nature Climate Change features Los Alamos forest research The print issue features as its cover story the tree-stress research of...

  11. Nature Climate Change features Los Alamos forest research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nature Climate Change Features Forest Research Nature Climate Change features Los Alamos forest research The print issue features as its cover story the tree-stress research of ...

  12. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7, 2012 Feature Stories and Releases Southern Great Plains Site in Path of Tornado Bookmark and Share Property of several SGP site personnel took a hit during the April 30...

  13. ARM - 2010 AMS Presentations Featuring ARM Data

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  14. ARM - 2009 AGU Presentations Featuring ARM Data

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  15. ARM - 2014 AMS Presentations Featuring ARM Data

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SGP 6 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field...

  16. Feature Based Measuring, Version 2.1

    Energy Science and Technology Software Center (OSTI)

    2002-07-22

    A model-based tool that uses Measurement Features for generating measurement plans that facilitate DMIS compliant CMM Measurement part programs for both manufacturing verification and/or product acceptance.

  17. Category:Topographic Features | Open Energy Information

    Open Energy Info (EERE)

    Features" The following 9 pages are in this category, out of 9 total. C Caldera Depression Cinder Cone F Flat H Horst and Graben L Lava Dome M Mountainous R Resurgent Dome...

  18. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9, 2015 Facility News, Feature Stories and Releases Seeing the Forest Through the Trees-And to the Aerosols Bookmark and Share End of the Biogenic Aerosols - Effects on Clouds...

  19. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    26, 2015 Feature Stories and Releases Delineating the Sharp Edges of Clouds, Down to the Micrometer Bookmark and Share The HOLODEC, developed in part with funding from the ARM...

  20. Feature Clustering for Accelerating Parallel Coordinate Descent

    SciTech Connect (OSTI)

    Scherrer, Chad; Tewari, Ambuj; Halappanavar, Mahantesh; Haglin, David J.

    2012-12-06

    We demonstrate an approach for accelerating calculation of the regularization path for L1 sparse logistic regression problems. We show the benefit of feature clustering as a preconditioning step for parallel block-greedy coordinate descent algorithms.

  1. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 13, 2012 Feature Stories and Releases Up Close and Personal at Cape Cod National Seashore Bookmark and Share Visitors make their way to the ARM Mobile Facility, located on...

  2. Topology-based Feature Definition and Analysis

    SciTech Connect (OSTI)

    Weber, Gunther H.; Bremer, Peer-Timo; Gyulassy, Attila; Pascucci, Valerio

    2010-12-10

    Defining high-level features, detecting them, tracking them and deriving quantities based on them is an integral aspect of modern data analysis and visualization. In combustion simulations, for example, burning regions, which are characterized by high fuel-consumption, are a possible feature of interest. Detecting these regions makes it possible to derive statistics about their size and track them over time. However, features of interest in scientific simulations are extremely varied, making it challenging to develop cross-domain feature definitions. Topology-based techniques offer an extremely flexible means for general feature definitions and have proven useful in a variety of scientific domains. This paper will provide a brief introduction into topological structures like the contour tree and Morse-Smale complex and show how to apply them to define features in different science domains such as combustion. The overall goal is to provide an overview of these powerful techniques and start a discussion how these techniques can aid in the analysis of astrophysical simulations.

  3. A Collection of Features for Semantic Graphs

    SciTech Connect (OSTI)

    Eliassi-Rad, T; Fodor, I K; Gallagher, B

    2007-05-02

    Semantic graphs are commonly used to represent data from one or more data sources. Such graphs extend traditional graphs by imposing types on both nodes and links. This type information defines permissible links among specified nodes and can be represented as a graph commonly referred to as an ontology or schema graph. Figure 1 depicts an ontology graph for data from National Association of Securities Dealers. Each node type and link type may also have a list of attributes. To capture the increased complexity of semantic graphs, concepts derived for standard graphs have to be extended. This document explains briefly features commonly used to characterize graphs, and their extensions to semantic graphs. This document is divided into two sections. Section 2 contains the feature descriptions for static graphs. Section 3 extends the features for semantic graphs that vary over time.

  4. Feature recognition applications in mesh generation

    SciTech Connect (OSTI)

    Tautges, T.J.; Liu, S.S.; Lu, Y.; Kraftcheck, J.; Gadh, R.

    1997-06-01

    The use of feature recognition as part of an overall decomposition-based hexahedral meshing approach is described in this paper. The meshing approach consists of feature recognition, using a c-loop or hybrid c-loop method, and the use of cutting surfaces to decompose the solid model. These steps are part of an iterative process, which proceeds either until no more features can be recognized or until the model has been completely decomposed into meshable sub-volumes. This method can greatly reduce the time required to generate an all-hexahedral mesh, either through the use of more efficient meshing algorithms on more of the geometry or by reducing the amount of manual decomposition required to mesh a volume.

  5. Supai salt karst features: Holbrook Basin, Arizona

    SciTech Connect (OSTI)

    Neal, J.T.

    1994-12-31

    More than 300 sinkholes, fissures, depressions, and other collapse features occur along a 70 km (45 mi) dissolution front of the Permian Supai Formation, dipping northward into the Holbrook Basin, also called the Supai Salt Basin. The dissolution front is essentially coincident with the so-called Holbrook Anticline showing local dip reversal; rather than being of tectonic origin, this feature is likely a subsidence-induced monoclinal flexure caused by the northward migrating dissolution front. Three major areas are identified with distinctive attributes: (1) The Sinks, 10 km WNW of Snowflake, containing some 200 sinkholes up to 200 m diameter and 50 m depth, and joint controlled fissures and fissure-sinks; (2) Dry Lake Valley and contiguous areas containing large collapse fissures and sinkholes in jointed Coconino sandstone, some of which drained more than 50 acre-feet ({approximately}6 {times} 10{sup 4} m{sup 3}) of water overnight; and (3) the McCauley Sinks, a localized group of about 40 sinkholes 15 km SE of Winslow along Chevelon Creek, some showing essentially rectangular jointing in the surficial Coconino Formation. Similar salt karst features also occur between these three major areas. The range of features in Supai salt are distinctive, yet similar to those in other evaporate basins. The wide variety of dissolution/collapse features range in development from incipient surface expression to mature and old age. The features began forming at least by Pliocene time and continue to the present, with recent changes reportedly observed and verified on airphotos with 20 year repetition. The evaporate sequence along interstate transportation routes creates a strategic location for underground LPG storage in leached caverns. The existing 11 cavern field at Adamana is safely located about 25 miles away from the dissolution front, but further expansion initiatives will require thorough engineering evaluation.

  6. New Features of the Edison XC30

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Features of the Edison XC30 New Features of the Edison XC30 While the Edison and Hopper systems have similar programming environments and software, there are some key architectural differences between the two systems. This page describes those differences. Compute nodes Edison and Hopper both have a total of 24 cores on each compute node. Edison, like Hopper, has two sockets on each compute node, but instead of four "NUMA" memory domains, Edison has only two. Edison uses Intel

  7. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    CenterFeature Stories and ReleasesFeature Stories and Releases Article Media Contact Hanna Goss hanna-dot-goss-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes117 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 7 ARM Mobile Facility 2 47 ARM Mobile Facility 3 1 BAECC 1 BBOP 4 CARES 1 Data Quality Office 2 ENA 2 GOAMAZON 7 HI-SCALE 4 LASIC 3 MAGIC 15 MC3E 17 PECAN 3 SGP 8 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media

  8. BEopt Version 2.0: New Features

    Office of Energy Efficiency and Renewable Energy (EERE)

    This document outlines the new features and capabilities of BEopt Version 2.0, a software that provides capabilities to evaluate residential building designs and identify cost-optimal efficiency packages at various levels of whole-house energy savings along the path to zero net energy.

  9. General features of Hugoniots-II

    SciTech Connect (OSTI)

    Johnson, J.D.

    1997-01-01

    The author has derived a differential version of the Principal Hugoniot jump relations for a shock wave. From this algebraic equation, relating equation of state and U{sub s} - U{sub p} Hugoniot variables, I explain the general features of the Hugoniot, including two regions of linearity, limiting forms, and insensitivity to shell structure.

  10. Geothermal Energy Featured on NBC's Today Show

    Broader source: Energy.gov [DOE]

    In Iceland, there are five major geothermal power plants which produce about 26% (2006) of the country's electricity. In addition, geothermal heating meets the heating and hot water requirements for around 87% of the nation's buildings. As part of its "Ends of the Earth" series, NBC's Today Show presented a feature on the use of geothermal energy in Iceland.

  11. Fizzy. Feature subset selection for metagenomics

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ditzler, Gregory; Morrison, J. Calvin; Lan, Yemin; Rosen, Gail L.

    2015-11-04

    Background: Some of the current software tools for comparative metagenomics provide ecologists with the ability to investigate and explore bacterial communities using α– & β–diversity. Feature subset selection – a sub-field of machine learning – can also provide a unique insight into the differences between metagenomic or 16S phenotypes. In particular, feature subset selection methods can obtain the operational taxonomic units (OTUs), or functional features, that have a high-level of influence on the condition being studied. For example, in a previous study we have used information-theoretic feature selection to understand the differences between protein family abundances that best discriminate betweenmore » age groups in the human gut microbiome. Results: We have developed a new Python command line tool, which is compatible with the widely adopted BIOM format, for microbial ecologists that implements information-theoretic subset selection methods for biological data formats. We demonstrate the software tools capabilities on publicly available datasets. Conclusions: We have made the software implementation of Fizzy available to the public under the GNU GPL license. The standalone implementation can be found at http://github.com/EESI/Fizzy.« less

  12. Fizzy. Feature subset selection for metagenomics

    SciTech Connect (OSTI)

    Ditzler, Gregory; Morrison, J. Calvin; Lan, Yemin; Rosen, Gail L.

    2015-11-04

    Background: Some of the current software tools for comparative metagenomics provide ecologists with the ability to investigate and explore bacterial communities using α– & β–diversity. Feature subset selection – a sub-field of machine learning – can also provide a unique insight into the differences between metagenomic or 16S phenotypes. In particular, feature subset selection methods can obtain the operational taxonomic units (OTUs), or functional features, that have a high-level of influence on the condition being studied. For example, in a previous study we have used information-theoretic feature selection to understand the differences between protein family abundances that best discriminate between age groups in the human gut microbiome. Results: We have developed a new Python command line tool, which is compatible with the widely adopted BIOM format, for microbial ecologists that implements information-theoretic subset selection methods for biological data formats. We demonstrate the software tools capabilities on publicly available datasets. Conclusions: We have made the software implementation of Fizzy available to the public under the GNU GPL license. The standalone implementation can be found at http://github.com/EESI/Fizzy.

  13. Semantic Features for Classifying Referring Search Terms

    SciTech Connect (OSTI)

    May, Chandler J.; Henry, Michael J.; McGrath, Liam R.; Bell, Eric B.; Marshall, Eric J.; Gregory, Michelle L.

    2012-05-11

    When an internet user clicks on a result in a search engine, a request is submitted to the destination web server that includes a referrer field containing the search terms given by the user. Using this information, website owners can analyze the search terms leading to their websites to better understand their visitors needs. This work explores some of the features that can be used for classification-based analysis of such referring search terms. We present initial results for the example task of classifying HTTP requests countries of origin. A system that can accurately predict the country of origin from query text may be a valuable complement to IP lookup methods which are susceptible to the obfuscation of dereferrers or proxies. We suggest that the addition of semantic features improves classifier performance in this example application. We begin by looking at related work and presenting our approach. After describing initial experiments and results, we discuss paths forward for this work.

  14. NREL Open House Features Energy Activities, Tours

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Open House Features Energy Activities, Tours For more information contact: e:mail: Public Affairs Golden, Colo., July 8, 1999 — Discover the power of clean energy at the nation's premier laboratory for renewable energy and energy efficiency research, development and deployment. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) will open its doors 10 a.m. to 3 p.m., Saturday, July 24 for tours of its research facilities and interactive exhibits at the Visitors Center.

  15. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1, 2005 [Feature Stories and Releases] Climate Scientists Gather at Sandia National Laboratories to Simulate Tropical Cloud Experiment Bookmark and Share Media Advisory Media Contact: Lynne Roeder, 509.372.4331 Technical Contact: Mike Janes, 925.294.2447 The ARM Program-the Department of Energy's largest global change research program-was created to help resolve scientific uncertainties related to global climate change. Its specific focus is on the crucial role of clouds and their influence on

  16. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 28, 2011 [Facility News, Feature Stories and Releases, Publications] Pass the lotion; new study shows drying trend over Great Plains Bookmark and Share Analysis of infrared energy levels useful for similar evaluations at local scale Illustration of seasonal infrared energy trends observed at the ARM Southern Great Plains site between 1996 and 2010. Click on image to enlarge. Illustration of seasonal infrared energy trends observed at the ARM Southern Great Plains site between 1996 and

  17. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1, 2011 [Feature Stories and Releases] Aloha! Mobile Facility to Sail the Pacific; Southern Great Plains Hosts Aerosol and Carbon Campaigns Bookmark and Share Each year, the ARM Climate Research Facility reviews proposals to use key components of the Facility for extended or intensive field campaigns. The Department of Energy recently announced the selection of new field campaigns that will take place from 2012 through 2013. They include an investigation of marine cloud processes over the

  18. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    23, 2008 [Feature Stories and Releases] Field Campaigns for 2010 Range from the Arctic to the Azores Bookmark and Share With the recent awards, the ARM Mobile Facility deployment on Graciosa Island in the Azores is extended from its original 9-month duration, beginning in May 2009 and now lasting through November 2010. The Department of Energy recently announced the selection of major ARM field campaigns that will take place in 2010. Studies led by principal investigators Rob Wood, Hans

  19. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    13, 2013 [Facility News, Feature Stories and Releases] Research Flights Completed for Biomass Burning Field Campaign Bookmark and Share The Gulstream-1 heads toward a smoke plume during a research flight for the Biomass Burning Observation Project. The Gulstream-1 heads toward a smoke plume during a research flight for the Biomass Burning Observation Project. In late October, the ARM Aerial Facility wrapped up a busy season of research flights for the Biomass Burning Observation Project, using a

  20. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    December 30, 2013 [Feature Stories and Releases] Pole Position: New Field Campaigns Explore Arctic and Antarctic Atmosphere Bookmark and Share Each year, the ARM Climate Research Facility receives proposals to use key components of the Facility for extended or intensive field campaigns to improve understanding of atmospheric processes that are relevant to regional and global climate. The Department of Energy has selected the following field campaigns that take place from 2014 through 2016. ARM

  1. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 27, 2009 [Facility News, Feature Stories and Releases] Ceremony in the Azores Recognizes Scientific Collaborations Bookmark and Share A mix of green pastures and isolated white-housed villages dot the landscape of Graciosa Island. The ARM Mobile Facility will be located near the airport at the northern end of the island. In a signing ceremony at the Laboratorio Regional Engenharia Civil in Ponta Delgada, the Azores, government officials from the United States and Portugal formally

  2. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 16, 2015 [Feature Stories and Releases] Getting an Inside View of Arctic Clouds Bookmark and Share Researchers investigate the polar atmosphere's unique properties Researchers are using unmanned aerial systems to study Arctic atmospheric processes, especially where the tundra and ocean meet. Researchers are using unmanned aerial systems to study Arctic atmospheric processes, especially where the tundra and ocean meet. On the north coast of Alaska, where the barren tundra meets the icy

  3. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    January 19, 2016 [Feature Stories and Releases] Scientists Study Clouds' Impact on West Antarctic Ice Melt Bookmark and Share Antarctic clouds studied for first time in five decades Heath Powers, Los Alamos National Laboratory, and Dan Lubin, AWARE lead scientist, prepare a weather balloon at WAIS Divide Ice Camp. Image courtesy of Dan Lubin. Heath Powers, Los Alamos National Laboratory, and Dan Lubin, AWARE lead scientist, prepare a weather balloon at WAIS Divide Ice Camp. Image courtesy of Dan

  4. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 23, 2016 [Feature Stories and Releases] Smoke From African Fires: Studying its Impact on Low Clouds Bookmark and Share New 17-month ARM campaign investigates airborne carbonaceous particles Beginning June 1, the first ARM Mobile Facility is deployed to Ascension Island in the southeast Atlantic Ocean to study how smoke transported from biomass burning in Southern Africa effects low-hanging clouds. Beginning June 1, the first ARM Mobile Facility is deployed to Ascension Island in the

  5. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7, 2007 [Feature Stories and Releases] Researchers Combine Atmospheric Science with Heartland Farming Bookmark and Share Field studies use aircraft, satellite and ground-based sensors to examine effects of land use on regional climate This week, two major scientific field studies begin in Oklahoma to investigate major uncertainties in climate models-aerosols and clouds. Both campaigns are focused on fair weather clouds, but one is studying the influence of land surface changes, such as soil

  6. Structural features of dielectric oxide laser ceramics

    SciTech Connect (OSTI)

    Kaminskii, Alexandr A; Taranov, A V; Khazanov, E N; Akchurin, M Sh

    2012-10-31

    The relation between the transport characteristics of subterahertz thermal phonons and the structural features of singlephase dielectric crystalline laser ceramics based on cubic oxides synthesised in different technological regimes is studied. The effect of plastic deformation on the formation of the grain structure and intergrain layers (boundaries), as well as on the thermophysical, acoustic, optical, and laser characteristics of the materials is analysed. (active media)

  7. Latest Feature Video | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Latest Feature Video Sensitive Instrument Facility Dedication Secretary of Energy Ernest Moniz helped cut the ribbon to dedicate Ames Laboratory's Sensitive Instrument Facility on May 6, 2016. Anderson named to National Academy of Inventors Ames Laboratory senior metallurgist and 2015 National Academy of Inventors inductee, Iver Anderson, talks about being an inventor and having the drive to solve problems, using information from many different sources. CCI Virtual Tour Daniel Bouk, a student in

  8. Special Feature: Five Questions for Sudip Dosanjh

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Five Questions for Sudip Dosanjh Special Feature: Five Questions for Sudip Dosanjh September 27, 2013 Sudip-wide.jpg Sudip Dosanjh Sudip Dosanjh is Director of the National Energy Research Scientific Computing (NERSC) Center at Lawrence Berkeley National Laboratory. NERSC's mission is to accelerate scientific discovery at the U.S. Department of Energy's Office of Science through high performance computing and extreme data analysis. NERSC deploys leading-edge computational and data resources for

  9. Special Feature: Supercomputers Map Our Changing Climate

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Supercomputers Map Our Changing Climate Special Feature: Supercomputers Map Our Changing Climate September 23, 2013 Contact: Jon Bashor, jbashor@lbl.gov, 510-486-5849 cam5-hurricane-2145950x400.jpg In this simulation, Berkeley researchers used the finite volume version of NCAR's Community Atmosphere Model to see how well the model can reproduced observed tropical cyclone statistics. The simulated storms seen in this animation are generated spontaneously from the model's simulated weather

  10. Startup Design Features for Supercritical Power Conversion Systems...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find More Like This Return to Search Startup Design Features for Supercritical Power ... DescriptionThe new design features and procedures will improve the already advanced ...

  11. Category:Modern Geothermal Features | Open Energy Information

    Open Energy Info (EERE)

    Modern Geothermal Features Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Category:Modern Geothermal Features Geothermalpower.jpg Looking for the Modern Geothermal...

  12. DVU Featured Training & Events Form

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Featured Training & Events Form Please complete this form in its entirety and email to AskTheDvu@hq.doe.gov 1. Course Title: 2. Course Start/End Date: 3. Start/End Time (Time zone required): 4. Registration Link: Website Name and URL Link: 5. CHRIS Course Code & Session Number: If Applicable, Enter 6-Digit CHRIS Course Number 4-Digit CHRIS Session Number 6. Cost: 7. Course Type: (Ex: Live Webinar, Classroom, Online) 8. Course Location: Training Facility Address, Room # City & State

  13. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    3, 2013 [Facility News, Feature Stories and Releases] Cloud Cocktail Melts Greenland Ice Sheet Bookmark and Share Like the partygoer that just won't leave, low-level clouds hang around and cause temperatures to rise Not all clouds are created equal-especially in the Arctic. New research published in the journal Nature shows that low-level clouds in Greenland that contain just the right amount of water are thick enough to block heat from escaping to space, but thin enough to allow sunlight to

  14. ARM - Feature Stories and Releases Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 5, 2015 [Feature Stories and Releases] Icy Arctic Proves Hot for Climate Data Bookmark and Share ARM-ACME V wraps-up field campaign in Alaska ARM-ACME V Principal Investigator Sébastien Biraud in the cabin of the G-1 aircraft next to the greenhouse-gas-monitoring instruments. Image courtesy of John Hubbe, AAF Payload Director. ARM-ACME V Principal Investigator Sébastien Biraud in the cabin of the G-1 aircraft next to the greenhouse-gas-monitoring instruments. Image courtesy of John

  15. ENGINEERED BARRIER SYSTEM FEATURES, EVENTS AND PROCESSES

    SciTech Connect (OSTI)

    Jaros, W.

    2005-08-30

    The purpose of this report is to evaluate and document the inclusion or exclusion of engineered barrier system (EBS) features, events, and processes (FEPs) with respect to models and analyses used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for exclusion screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs addressed in this report deal with those features, events, and processes relevant to the EBS focusing mainly on those components and conditions exterior to the waste package and within the rock mass surrounding emplacement drifts. The components of the EBS are the drip shield, waste package, waste form, cladding, emplacement pallet, emplacement drift excavated opening (also referred to as drift opening in this report), and invert. FEPs specific to the waste package, cladding, and drip shield are addressed in separate FEP reports: for example, ''Screening of Features, Events, and Processes in Drip Shield and Waste Package Degradation'' (BSC 2005 [DIRS 174995]), ''Clad Degradation--FEPs Screening Arguments (BSC 2004 [DIRS 170019]), and Waste-Form Features, Events, and Processes'' (BSC 2004 [DIRS 170020]). For included FEPs, this report summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report also documents changes to the EBS FEPs list that have occurred since the previous versions of this report. These changes have resulted due to a reevaluation of the FEPs for TSPA-LA as identified in Section 1.2 of this report and described in more detail in Section 6.1.1. This revision addresses updates in Yucca Mountain Project (YMP) administrative procedures as they

  16. Method of identifying features in indexed data

    DOE Patents [OSTI]

    Jarman, Kristin H. [Richland, WA; Daly, Don Simone [Richland, WA; Anderson, Kevin K. [Richland, WA; Wahl, Karen L. [Richland, WA

    2001-06-26

    The present invention is a method of identifying features in indexed data, especially useful for distinguishing signal from noise in data provided as a plurality of ordered pairs. Each of the plurality of ordered pairs has an index and a response. The method has the steps of: (a) providing an index window having a first window end located on a first index and extending across a plurality of indices to a second window end; (b) selecting responses corresponding to the plurality of indices within the index window and computing a measure of dispersion of the responses; and (c) comparing the measure of dispersion to a dispersion critical value. Advantages of the present invention include minimizing signal to noise ratio, signal drift, varying baseline signal and combinations thereof.

  17. Features, Events, and Processes: Disruptive Events

    SciTech Connect (OSTI)

    J. King

    2004-03-31

    The primary purpose of this analysis is to evaluate seismic- and igneous-related features, events, and processes (FEPs). These FEPs represent areas of natural system processes that have the potential to produce disruptive events (DE) that could impact repository performance and are related to the geologic processes of tectonism, structural deformation, seismicity, and igneous activity. Collectively, they are referred to as the DE FEPs. This evaluation determines which of the DE FEPs are excluded from modeling used to support the total system performance assessment for license application (TSPA-LA). The evaluation is based on the data and results presented in supporting analysis reports, model reports, technical information, or corroborative documents that are cited in the individual FEP discussions in Section 6.2 of this analysis report.

  18. Component with inspection-facilitating features

    DOE Patents [OSTI]

    Marra, John J; Zombo, Paul J

    2014-02-11

    A turbine airfoil can be formed with features to facilitate measurement of its wall thickness. An outer wall of the airfoil can include an outer surface and an inner surface. The outer surface of the airfoil can have an outer inspection target surface, and the inner surface of the airfoil can have an inner inspection target surface. The inner and outer target surfaces can define substantially flat regions in surfaces that are otherwise highly contoured. The inner and outer inspection target surfaces can be substantially aligned with each other. The inner and outer target surfaces can be substantially parallel to each other. As a result of these arrangements, a highly accurate measurement of wall thickness can be obtained. In one embodiment, the outer inspection target surface can be defined by an innermost surface of a groove formed in the outer surface of the outer wall of the airfoil.

  19. Richards Barrier LA Reference Design Feature Evaluation

    SciTech Connect (OSTI)

    N.E. Kramer

    1999-11-17

    The Richards Barrier is one of the design features of the repository to be considered for the License Application (LA), Richards was a soil scientist who first described the diversion of moisture between two materials with different hydrologic properties. In this report, a Richards Barrier is a special type of backfill with a fine-grained material (such as sand) overlaying a coarse-grained material (such as gravel). Water that enters an emplacement drift will first encounter the fine-grained material and be transported around the coarse-grained material covering the waste package, thus protecting the waste package from contact with most of the groundwater. The objective of this report is to discuss the benefits and liabilities to the repository by the inclusion of a Richards Barrier type backfill in emplacement drifts. The Richards Barrier can act as a barrier to water flow, can reduce the waste package material dissolution rate, limit mobilization of the radionuclides, and can provide structural protection for the waste package. The scope of this report is to: (1) Analyze the behavior of barrier materials following the intrusion of groundwater for influxes of 1 to 300 mm per year. The report will demonstrate diversion of groundwater intrusions into the barrier over an extended time period when seismic activity and consolidation may cause the potential for liquefaction and settlement of the Richards Barrier. (2) Review the thermal effects of the Richards Barrier on material behavior. (3) Analyze the effect of rockfall on the performance of the Richards Barrier and the depth of the barrier required to protect waste packages under the barrier. (4) Review radiological and heating conditions on placement of multiple layers of the barrier. Subsurface Nuclear Safety personnel will perform calculations to determine the radiation reduction-time relationship and shielding capacity of the barrier. (5) Evaluate the effects of ventilation on cooling of emplacement drifts and

  20. Princeton Plasma Physics Lab - Nanotechnology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL), Adam Cohen has been named Deputy Under Secretary for Science and Energy in Washington D.C....

  1. Features, Events, and Processes: Disruptive Events

    SciTech Connect (OSTI)

    P. Sanchez

    2004-11-08

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the disruptive events features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for license application (TSPA-LA). A screening decision, either ''Included'' or ''Excluded,'' is given for each FEP, along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d), (e), and (f) [DIRS 156605]. The FEPs addressed in this report deal with both seismic and igneous disruptive events, such as fault displacements through the repository and an igneous intrusion into the repository. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). Previous versions of this report were developed to support the total system performance assessments (TSPA) for various prior repository designs. This revision addresses the repository design for the license application (LA).

  2. Features, Events, and Processes: system Level

    SciTech Connect (OSTI)

    D. McGregor

    2004-10-15

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the system-level features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.113 (d, e, and f) (DIRS 156605). The system-level FEPs addressed in this report typically are overarching in nature, rather than being focused on a particular process or subsystem. As a result, they are best dealt with at the system level rather than addressed within supporting process-level or subsystem-level analyses and models reports. The system-level FEPs also tend to be directly addressed by regulations, guidance documents, or assumptions listed in the regulations; or are addressed in background information used in development of the regulations. For included FEPs, this analysis summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from the TSPA-LA (i.e., why the FEP is excluded). The initial version of this report (Revision 00) was developed to support the total system performance assessment for site recommendation (TSPA-SR). This revision addresses the license application (LA) FEP List (DIRS 170760).

  3. Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music NEWPORT NEWS, Va., Feb. ...

  4. PARC Seminar Series featuring Rienk van Grondelle | Photosynthetic Antenna

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Center PARC Seminar Series featuring Rienk van Grondelle PARC Seminar Series featuring Rienk van Grondelle October 4, 2016 - 11:00am Brauer Hall room 12

  5. PARC Seminar Series featuring David Tiede | Photosynthetic Antenna...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PARC Seminar Series featuring David Tiede PARC Seminar Series featuring David Tiede Wiring Photosynthetic and Redox Proteins for Solar Fuels Function April 21, 2015 - 11:00am Rodin...

  6. GM-Ford-Chrysler: IFR Consolidated Application Feature | Department of

    Broader source: Energy.gov (indexed) [DOE]

    Energy IFR Consolidated Application Feature GM-Ford-Chrysler: IFR Consolidated Application Feature (66.33 KB) More Documents & Publications GM-Ford-Chrysler: Issues Related to Vehicle Eligibility GM-Ford-Chrysler: ATV Proposed Product Costs

  7. ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill...

    Office of Environmental Management (EM)

    Summit Featuring Bill Gates, Fred Smith and Lee Scott ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott September 9, 2011 - 9:25am ...

  8. US Department of Energy Promotes Special Earth Week Feature on...

    Energy Savers [EERE]

    will be immediately directed to a special web feature giving them key energy saving tips ... regular website will still be available to users by closing the special web feature. ...

  9. LSU EFRC - Center for Atomic Level Catalyst Design - Featured Videos

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured Videos >> space control Dr. James Spivey featured in ACS: Voices of Research space control Dr. Wayne Goodman's Research Group space control Group of Inorganic Chemistry and Catalysis space control Dr. Susan Sinnot's Research Group space control Nanomaterials and Nanofabrication Group space control space control Featured Videos space control space control Other Featured Videos space control Dr. Wayne Goodman's Research Group at Department of Chemistry, Texas A & M University

  10. Physics Features of TRU-Fueled VHTRs

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lewis, Tom G.; Tsvetkov, Pavel V.

    2009-01-01

    The current waste management strategy for spent nuclear fuel (SNF) mandated by the US Congress is the disposal of high-level waste (HLW) in a geological repository at Yucca Mountain. Ongoing efforts on closed-fuel cycle options and difficulties in opening and safeguarding such a repository have led to investigations of alternative waste management strategies. One potential strategy for the US fuel cycle would be to make use of fuel loadings containing high concentrations of transuranic (TRU) nuclides in the next-generation reactors. The use of such fuels would not only increase fuel supply but could also potentially facilitate prolonged operation modes (viamore » fertile additives) on a single fuel loading. The idea is to approach autonomous operation on a single fuel loading that would allow marketing power units as nuclear batteries for worldwide deployment. Studies have already shown that high-temperature gas-cooled reactors (HTGRs) and their Generation IV (GEN IV) extensions, very-high-temperature reactors (VHTRs), have encouraging performance characteristics. This paper is focused on possible physics features of TRU-fueled VHTRs. One of the objectives of a 3-year U.S. DOE NERI project was to show that TRU-fueled VHTRs have the possibility of prolonged operation on a single fuel loading. A 3D temperature distribution was developed based on conceivable operation conditions of the 600 MWth VHTR design. Results of extensive criticality and depletion calculations with varying fuel loadings showed that VHTRs are capable for autonomous operation and HLW waste reduction when loaded with TRU fuel.« less

  11. Systems and processes for identifying features and determining feature associations in groups of documents

    DOE Patents [OSTI]

    Rose, Stuart J.; Cowley, Wendy E.; Crow, Vernon L.

    2016-01-12

    Systems and computer-implemented processes for identification of features and determination of feature associations in a group of documents can involve providing a plurality of keywords identified among the terms of at least some of the documents. A value measure can be calculated for each keyword. High-value keywords are defined as those keywords having value measures that exceed a threshold. For each high-value keyword, term-document associations (TDA) are accessed. The TDA characterize measures of association between each term and at least some documents in the group. A processor quantifies similarities between unique pairs of high-value keywords based on the TDA for each respective high-value keyword and generates a similarity matrix that indicates one or more sets that each comprise highly associated high-value keywords.

  12. Technology Deployment Featured Case Studies | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Products & Technologies » Technology Deployment » Technology Deployment Featured Case Studies Technology Deployment Featured Case Studies These case studies feature evaluations of energy-efficient technologies being used in federal applications. See additional technology deployment case studies. Photo of men working on a boiler. Boiler Combustion Control and Monitoring System: The Department of Defense Environmental Security Technology Certification Program tested a boiler combustion

  13. Trajectory analysis via a geometric feature space approach

    SciTech Connect (OSTI)

    Rintoul, Mark D.; Wilson, Andrew T.

    2015-10-05

    This study aimed to organize a body of trajectories in order to identify, search for and classify both common and uncommon behaviors among objects such as aircraft and ships. Existing comparison functions such as the Fréchet distance are computationally expensive and yield counterintuitive results in some cases. We propose an approach using feature vectors whose components represent succinctly the salient information in trajectories. These features incorporate basic information such as the total distance traveled and the distance between start/stop points as well as geometric features related to the properties of the convex hull, trajectory curvature and general distance geometry. Additionally, these features can generally be mapped easily to behaviors of interest to humans who are searching large databases. Most of these geometric features are invariant under rigid transformation. Furthermore, we demonstrate the use of different subsets of these features to identify trajectories similar to an exemplar, cluster a database of several hundred thousand trajectories and identify outliers.

  14. Nature climate change features Los Alamos forest research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nature climate change features forest research Nature climate change features Los Alamos forest research The print issue features as its cover story the tree-stress research of LANL scientist A. Park Williams and partners from the U.S. Geological Survey, University of Arizona and several other organizations. February 27, 2013 Burned trees in the Jemez Mountains of New Mexico after the 2011 Las Conchas fire. Image by Craig D. Allen, USGS. Burned trees in the Jemez Mountains of New Mexico after

  15. Featured Articles | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured Articles News News Home Featured Articles 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Science Highlights Presentations & Testimony News Archives Communications and Public Affairs Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 Featured Articles Print Text Size: A A A Subscribe FeedbackShare Page Visualization of the 3-D distributions of elements in a fluid catalytic

  16. Jefferson Lab's Spring 2007 Science Series features two lectures in

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February | Jefferson Lab 2007 Science Series features two lectures in February Jefferson Lab's Spring 2007 Science Series features two lectures in February January 30, 2007 Jefferson Lab will host two Spring Science Series lectures during February 2007. The first event is set for Tuesday, February 20, and will feature David Powars, with the U.S. Geological Survey (USGS), discussing the Chesapeake Bay Impact Crater. He will share with the audience, recent research from a core hole more than a

  17. June 3, 2014 Webinar - Features, Events, and Processes: Practical

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Considerations for Development and Selection of Scenarios | Department of Energy June 3, 2014 Webinar - Features, Events, and Processes: Practical Considerations for Development and Selection of Scenarios June 3, 2014 Webinar - Features, Events, and Processes: Practical Considerations for Development and Selection of Scenarios Webinar - June 3, 2014 - Features, Events, and Processes: Practical Considerations for Development and Selection of Scenarios Geoff Freeze (SNL) and Roger Seitz (SRNL)

  18. Changes in Surficial Features Associated with Geothermal Development...

    Open Energy Info (EERE)

    Changes in Surficial Features Associated with Geothermal Development in Long Valley Caldera, California, 1985-1997 Jump to: navigation, search OpenEI Reference LibraryAdd to...

  19. US Department of Energy Promotes Special Earth Week Feature on...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Simple Steps Will Help Consumers Save Money -- and the Planet WASHINGTON, DC ... web feature giving them key energy saving tips and user-friendly information about ...

  20. DOE Science Showcase - Featured Climate Change Research from...

    Office of Scientific and Technical Information (OSTI)

    Featured Climate Change Research from DOE Databases Search Results from DOE Databases View research documents, citations, accomplishments, patents, and projects related to climate ...

  1. PARC Seminar Series featuring Don Bryant | Photosynthetic Antenna...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Don Bryant PARC Seminar Series featuring Don Bryant "Far-red light photoacclimation (FaRLiP) leads to extensive acclimative remodeling of photosynthetic apparatus in...

  2. Better Buildings Low Income Peer Exchange CallFeaturing: Case...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    BetterBuildings Low Income Peer Exchange Call Featuring: Case study on integration of ... and Roll Call * Case study on integration of income-qualified programs into ...

  3. Sandia Energy - Mark Boslough Featured in NOVA Special about...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in NOVA Special about the Chelyabinsk Meteor Scientist Mark Boslough (Discrete Mathematics and Complex Systems Dept.) was featured in NOVA's special program "Meteor Strike,"...

  4. OE's SGIG Program Featured in EnergyBiz Magazine | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    OE's SGIG Program Featured in International Publication Assistant Secretary Patricia Hoffman to Deliver Keynote Address at IEEE PES Conference on Innovative Smart Grid Technologies ...

  5. DOE's Carbon Storage Advances Featured in Special Issue of Internation...

    Energy Savers [EERE]

    DOE's Carbon Storage Advances Featured in Special Issue of ... monitor a geologic system to reduce uncertainty in ... conducted under the Energy Department's National Risk ...

  6. PPPL featured as DOE celebrates turning 35 | Princeton Plasma...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    featured as DOE celebrates turning 35 October 5, 2012 Tweet Widget Google Plus One Share on Facebook 35 Years at the Department of Energy (Flickr Photostream)...

  7. CASR and personnel features highlight Insider | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    carcinogens damage DNA. Forsling was featured for her second career as a musician and piano teacher. The issue also contained stories on Ames Laboratory holiday traditions and...

  8. Featured Content | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources » Featured Content Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) Community Resources Featured Content 2016 Archive ASCR Discovery ASCR Program Documents ASCR Workshops and Conferences Contact Information Advanced Scientific Computing Research U.S. Department of Energy SC-21/Germantown Building 1000 Independence Ave., SW Washington, DC

  9. PARC Seminar Series featuring Steven Boxer | Photosynthetic Antenna

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Center PARC Seminar Series featuring Steven Boxer PARC Seminar Series featuring Steven Boxer Vibrational Stark Spectroscopy Connects Electrostatics to Catalytic Rates at Enzyme Active Sites March 8, 2016 - 11:00am Brauer Hall 12, Washington University Event flyer Seminars

  10. Unsupervised Feature Learning for High-Resolution Satellite Image Classification

    SciTech Connect (OSTI)

    Cheriyadat, Anil M

    2013-01-01

    The rich data provided by high-resolution satellite imagery allow us to directly model geospatial neighborhoods by understanding their spatial and structural patterns. In this paper we explore an unsupervised feature learning approach to model geospatial neighborhoods for classification purposes. While pixel and object based classification approaches are widely used for satellite image analysis, often these approaches exploit the high-fidelity image data in a limited way. In this paper we extract low-level features to characterize the local neighborhood patterns. We exploit the unlabeled feature measurements in a novel way to learn a set of basis functions to derive new features. The derived sparse feature representation obtained by encoding the measured features in terms of the learned basis function set yields superior classification performance. We applied our technique on two challenging image datasets: ORNL dataset representing one-meter spatial resolution satellite imagery representing five land-use categories and, UCMERCED dataset consisting of 21 different categories representing sub-meter resolution overhead imagery. Our results are highly promising and, in the case of UCMERCED dataset we outperform the best results obtained for this dataset. We show that our feature extraction and learning methods are highly effective in developing a detection system that can be used to automatically scan large-scale high-resolution satellite imagery for detecting large-facility.

  11. PNNL: PNNL In the News - PNNL 50th Anniversary Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    50th Anniversary Features Prepared for the Tri-City Herald A closer look at climate September 2015 A closer look at climate This edition focuses on how PNNL's research is helping...

  12. PARC Seminar Series featuring Jan Jaworski | Photosynthetic Antenna...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jaworski PARC Seminar Series featuring Jan Jaworski Camelina as a model for oilseed biotechnology April 16, 2013 - 11:00am to 12:00pm Brauer 012, Washington University in St. Louis...

  13. Science in St. Louis featuring Dr. Daniel Giammar | Photosynthetic...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Daniel Giammar Science in St. Louis featuring Dr. Daniel Giammar The Chemistry and Engineering for Producing and Supplying Clean Drinking Water November 22, 2014 - 10:30am Brauer...

  14. Discrete Feature Approach for Heterogeneous Reservoir Production Enhancement

    SciTech Connect (OSTI)

    Dershowitz, William S.; Curran, Brendan; Einstein, Herbert; LaPointe, Paul; Shuttle, Dawn; Klise, Kate

    2002-07-26

    The report presents summaries of technology development for discrete feature modeling in support of the improved oil recovery (IOR) for heterogeneous reservoirs. In addition, the report describes the demonstration of these technologies at project study sites.

  15. Science.gov, Now with Multimedia, New Search Features, Spanish...

    Office of Scientific and Technical Information (OSTI)

    Information October 9, 2012 Science.gov, Now with Multimedia, New Search Features, Spanish Translations Spanish Version Debuted Oak Ridge, TN - Science.gov, the gateway to U.S. ...

  16. Wavelet Algorithm for Feature Identification and Image Analysis

    Energy Science and Technology Software Center (OSTI)

    2005-10-01

    WVL are a set of python scripts based on the algorithm described in "A novel 3D wavelet-based filter for visualizing features in noisy biological data, " W. C. Moss et al., J. Microsc. 219, 43-49 (2005)

  17. The Role of Circulation Features on Black Carbon Transport into...

    Office of Scientific and Technical Information (OSTI)

    Carbon Transport into the Arctic in the Community Atmosphere Model Version 5 (CAM5) Citation Details In-Document Search Title: The Role of Circulation Features on Black Carbon ...

  18. Science in St. Louis featuring Dr. Ursula Goodenough | Photosynthetic...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ursula Goodenough Science in St. Louis featuring Dr. Ursula Goodenough Developing Algae As Producers of Jet Fuel November 15, 2014 - 10:30am Brauer Hall 012, Washington University...

  19. Ultraviolet Thomson scattering measurements of the electron feature...

    Office of Scientific and Technical Information (OSTI)

    Title: Ultraviolet Thomson scattering measurements of the electron feature with an energetic 263 nm probe Authors: Ross, J S ; Divol, L ; Sorce, C ; Froula, D H ; Glenzer, S H ...

  20. OSTI features Nobel Prize winner Leon Lederman | OSTI, US Dept...

    Office of Scientific and Technical Information (OSTI)

    The OSTI-developed and -managed Web site, DOE R&D Accomplishments, has posted a feature highlighting Leon Lederman, who proposed the idea that eventually became the Fermi National ...

  1. Geothermal Heating and Cooling Systems Featured on NBC Nightly News

    Broader source: Energy.gov [DOE]

    NBC Nightly News recently featured a story on geothermal heating and cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York.

  2. Intrinsic feature-based pose measurement for imaging motion compensation

    DOE Patents [OSTI]

    Baba, Justin S.; Goddard, Jr., James Samuel

    2014-08-19

    Systems and methods for generating motion corrected tomographic images are provided. A method includes obtaining first images of a region of interest (ROI) to be imaged and associated with a first time, where the first images are associated with different positions and orientations with respect to the ROI. The method also includes defining an active region in the each of the first images and selecting intrinsic features in each of the first images based on the active region. Second, identifying a portion of the intrinsic features temporally and spatially matching intrinsic features in corresponding ones of second images of the ROI associated with a second time prior to the first time and computing three-dimensional (3D) coordinates for the portion of the intrinsic features. Finally, the method includes computing a relative pose for the first images based on the 3D coordinates.

  3. Aljazeera story on rare earths features Alex King | The Ames...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Aljazeera story on rare earths features Alex King Aljazeera America recently did a story on the demand and scarcity of rare-earth metals and spoke to Ames Laboratory scientist and...

  4. Featured Content | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources » Featured Content Fusion Energy Sciences (FES) FES Home About Research Facilities Science Highlights Benefits of FES Funding Opportunities Fusion Energy Sciences Advisory Committee (FESAC) Community Resources Featured Content 2016 Workshop Reports FES Presentations FES Program Documents Contact Information Fusion Energy Sciences U.S. Department of Energy SC-24/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-4941 F: (301) 903-8584 E: Email Us More

  5. Featured Content | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Content High Energy Physics (HEP) HEP Home About Research Facilities Science Highlights Benefits of HEP Funding Opportunities Advisory Committees Community Resources Featured Content 2016 2015 2014 2013 2012-2008 Reports Contact Information High Energy Physics U.S. Department of Energy SC-25/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3624 F: (301) 903-2597 E: Email Us More Information » Community Resources Featured Content Print Text Size: A A A

  6. Chicago Business Features Argonne Woman in Nuclear Physics | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Chicago Business Features Argonne Woman in Nuclear Physics Chicago Business Features Argonne Woman in Nuclear Physics January 9, 2012 - 4:08pm Addthis Kawtar Hafidi is an experimental nuclear physicist, working in the medium energy physics group at Argonne. Image courtesy of Argonne National Laboratory. Kawtar Hafidi is an experimental nuclear physicist, working in the medium energy physics group at Argonne. Image courtesy of Argonne National Laboratory. Chicago Business has the scoop

  7. Alaska Feature Articles and Blogs | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Alaska Feature Articles and Blogs Alaska Feature Articles and Blogs RSS June 6, 2016 Alaska possesses great natural beauty, but also has some of the most expensive energy costs in the United States. The Energy Department is helping many Alaskan communities adopt more sustainable energy strategies to alleviate high energy costs. Alaskan Community Efficiency Champions Compete for Funds to Implement Energy Reduction Plans Thirteen Native Alaska villages thirteen are developing unique plans to

  8. Parade of Homes Display Features Energy-Saving Ideas

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Parade of Homes Display Features Energy-Saving Ideas For more information contact: George Douglas (303) 275-4096 e:mail: george_douglas@nrel.gov Golden, Colo., July 29, 1998 — The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory will showcase energy efficient and solar energy ideas for homebuyers and homebuilders during the Denver-area Parade of Homes. NREL's exhibit features information on energy-efficient lighting, building design, windows and insulation. The display

  9. The effective field theory of inflation models with sharp features

    SciTech Connect (OSTI)

    Bartolo, Nicola; Cannone, Dario; Matarrese, Sabino E-mail: dario.cannone@pd.infn.it

    2013-10-01

    We describe models of single-field inflation with small and sharp step features in the potential (and sound speed) of the inflaton field, in the context of the Effective Field Theory of Inflation. This approach allows us to study the effects of features in the power-spectrum and in the bispectrum of curvature perturbations, from a model-independent point of view, by parametrizing the features directly with modified ''slow-roll'' parameters. We can obtain a self-consistent power-spectrum, together with enhanced non-Gaussianity, which grows with a quantity ? that parametrizes the sharpness of the step. With this treatment it is straightforward to generalize and include features in other coefficients of the effective action of the inflaton field fluctuations. Our conclusion in this case is that, excluding extrinsic curvature terms, the only interesting effects at the level of the bispectrum could arise from features in the first slow-roll parameter ? or in the speed of sound c{sub s}. Finally, we derive an upper bound on the parameter ? from the consistency of the perturbative expansion of the action for inflaton perturbations. This constraint can be used for an estimation of the signal-to-noise ratio, to show that the observable which is most sensitive to features is the power-spectrum. This conclusion would change if we consider the contemporary presence of a feature and a speed of sound c{sub s} < 1, as, in such a case, contributions from an oscillating folded configuration can potentially make the bispectrum the leading observable for feature models.

  10. 20th Century Reanalysis Project Featured in HPCWire Podcast

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20th Century 20th Century Reanalysis Project Featured in HPCWire Podcast March 11, 2014 earthreanalysis The 20th Century Reanalysis Project is generating a six-hourly, four-dimensional global atmospheric dataset spanning 1871 to 2011 to place current atmospheric circulation patterns into a historical perspective. Long-time NERSC user Dr. Gil Compo and the 20th Century Reanalysis project were featured March 10 in an HPCWire podcast, "Powering the 20th Century Weather Reanalysis

  11. Multi-tube fuel nozzle with mixing features

    DOE Patents [OSTI]

    Hughes, Michael John

    2014-04-22

    A system includes a multi-tube fuel nozzle having an inlet plate and a plurality of tubes adjacent the inlet plate. The inlet plate includes a plurality of apertures, and each aperture includes an inlet feature. Each tube of the plurality of tubes is coupled to an aperture of the plurality of apertures. The multi-tube fuel nozzle includes a differential configuration of inlet features among the plurality of tubes.

  12. Featured Publications from the Bats and Wind Energy Cooperative |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Featured Publications from the Bats and Wind Energy Cooperative Featured Publications from the Bats and Wind Energy Cooperative Since its formation in 2003, the Bats and Wind Energy Cooperative (BWEC) has been engaged in numerous research activities funded by DOE's National Renewable Energy Laboratory, including studies assessing the impact of altering the cut-in-speed of wind turbines (the minimum wind speed at which wind turbines begin producing power), and the use of

  13. OE's SGIG Program Featured in International Publication | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy OE's SGIG Program Featured in International Publication OE's SGIG Program Featured in International Publication April 6, 2012 - 2:10pm Addthis An article in the March 2012 issue of the quarterly publication Metering International focuses on DOE's Smart Grid Investment Grant program, highlighting how the program is improving the reliability and resiliency of the US electric grid. The article examines the need to protect the grid and the benefits of modernization, including reduced

  14. Los Alamos technology to be featured on CSI: NY

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LANL technology featured on CSI: NY Los Alamos technology to be featured on CSI: NY The multipurpose "sampler gun" rapidly collects and tracks radiological, chemical, and biological samples in solid, liquid, or gaseous forms. March 27, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and

  15. Feature-Based Measuring Advisor, Version 2.1

    Energy Science and Technology Software Center (OSTI)

    2002-07-22

    The purpose of Feature-Based Measuring Advisor (FBMeas Advisor) is a graphical user interface enabling users to more effectively interact with a solid model for measuring applications. Specifically, the FBMeas Advisor provides a user interface to the functions and capabilities of the FBMeas component technology. The FBMeas Advisor allows end users to visualize, organize, and document their measuring process plans and to facilitate the generation of a coordinate measuring machine part programs before a workpiece ismore » fabricated. The FBMeas Advisor permits the user to interact with an FBTol-enabled solid model to interactively and/or automatically create a set of measuring features (e.g., cylinders, planes, slots) that comply with national and international interface standards (i.e., DMIS (Dimensional Measuring Interface Standard, ISO 22063)). Measuring plans include defining measuring features interactively or automatically. Associating measuring features with appropriate tolerances and datum features via FBTol. Determining what measuring tasks (e.g., measure this feature to validate a size tolerance, measure this feature to establish a primary datum for a specific datum reference frame) are necessary to measure the feature. Assigning a measuring method to perform the task. For coordinate metrology measuring methods, measure points are determined interactively or automatically. Sensors and sensor configurations are defined, represented, and assigned to measuring methods. Measuring machines are defined, represented, and assigned to measure operations. Upon completion of a coordinate metrology measuring plan, FBMeas allows DMIS code segments to be generated, which can be used for DMIS-based CMM part programs.« less

  16. INL featured in video presented at Copenhagen conference

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    INL featured in video presented at Copenhagen conference IDAHO FALLS - Idaho National Laboratory footage and research are featured in a video presented at the World Climate Change Summit in Copenhagen today. President Obama introduced the video, which is titled "America's Response to Climate Change" and discusses how varied energy technologies can combat climate change. In October, the Department of Energy's Public Affairs office asked the national laboratories to suggest ideas about

  17. Sustainable Transportation and National Parks Initiative Featured in

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Magazine | Department of Energy Sustainable Transportation and National Parks Initiative Featured in Magazine Sustainable Transportation and National Parks Initiative Featured in Magazine October 18, 2013 - 12:00am Addthis The latest issue of Continuum Magazine, which focuses on sustainable transportation, includes an article that spotlights the Clean Cities National Parks Initiative. This initiative supports the National Park Service's Green Parks Plan with transportation projects that

  18. Jefferson Lab announces two Fall Science Series events -- featuring magic

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and football | Jefferson Lab events -- featuring magic and football Jefferson Lab announces two Fall Science Series events - featuring magic and football October 4, 2005 Using humor, stagecraft and lighting, along with laboratory experiments disguised as magical illusion, the audience will view science from a perspective most have never seen before with Bob Friedhoffer, author, scientist and magician. He will conduct "Einstein and Beyond - The Magic Show" on Tuesday, Oct. 25 at the

  19. NERSC Helps Physicists ID New Molecules With Unique Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NERSC Helps Physicists ID New Molecules With Unique Features NERSC Helps Physicists ID New Molecules With Unique Features Hollow magnetic cage molecules may have applications in technology, healthcare August 10, 2013 NERSC supercomputing resources helped Virginia Commonwealth University (VCU) researchers determine it may be possible to create large, hollow magnetic cage molecules that could be used in medicine as a drug delivery system to noninvasively treat tumors and in other emerging

  20. Feature-Based Statistical Analysis of Combustion Simulation Data

    SciTech Connect (OSTI)

    Bennett, J; Krishnamoorthy, V; Liu, S; Grout, R; Hawkes, E; Chen, J; Pascucci, V; Bremer, P T

    2011-11-18

    We present a new framework for feature-based statistical analysis of large-scale scientific data and demonstrate its effectiveness by analyzing features from Direct Numerical Simulations (DNS) of turbulent combustion. Turbulent flows are ubiquitous and account for transport and mixing processes in combustion, astrophysics, fusion, and climate modeling among other disciplines. They are also characterized by coherent structure or organized motion, i.e. nonlocal entities whose geometrical features can directly impact molecular mixing and reactive processes. While traditional multi-point statistics provide correlative information, they lack nonlocal structural information, and hence, fail to provide mechanistic causality information between organized fluid motion and mixing and reactive processes. Hence, it is of great interest to capture and track flow features and their statistics together with their correlation with relevant scalar quantities, e.g. temperature or species concentrations. In our approach we encode the set of all possible flow features by pre-computing merge trees augmented with attributes, such as statistical moments of various scalar fields, e.g. temperature, as well as length-scales computed via spectral analysis. The computation is performed in an efficient streaming manner in a pre-processing step and results in a collection of meta-data that is orders of magnitude smaller than the original simulation data. This meta-data is sufficient to support a fully flexible and interactive analysis of the features, allowing for arbitrary thresholds, providing per-feature statistics, and creating various global diagnostics such as Cumulative Density Functions (CDFs), histograms, or time-series. We combine the analysis with a rendering of the features in a linked-view browser that enables scientists to interactively explore, visualize, and analyze the equivalent of one terabyte of simulation data. We highlight the utility of this new framework for combustion

  1. Volume Decomposition and Feature Recognition for Hexahedral Mesh Generation

    SciTech Connect (OSTI)

    GADH,RAJIT; LU,YONG; TAUTGES,TIMOTHY J.

    1999-09-27

    Considerable progress has been made on automatic hexahedral mesh generation in recent years. Several automatic meshing algorithms have proven to be very reliable on certain classes of geometry. While it is always worth pursuing general algorithms viable on more general geometry, a combination of the well-established algorithms is ready to take on classes of complicated geometry. By partitioning the entire geometry into meshable pieces matched with appropriate meshing algorithm the original geometry becomes meshable and may achieve better mesh quality. Each meshable portion is recognized as a meshing feature. This paper, which is a part of the feature based meshing methodology, presents the work on shape recognition and volume decomposition to automatically decompose a CAD model into meshable volumes. There are four phases in this approach: (1) Feature Determination to extinct decomposition features, (2) Cutting Surfaces Generation to form the ''tailored'' cutting surfaces, (3) Body Decomposition to get the imprinted volumes; and (4) Meshing Algorithm Assignment to match volumes decomposed with appropriate meshing algorithms. The feature determination procedure is based on the CLoop feature recognition algorithm that is extended to be more general. Results are demonstrated over several parts with complicated topology and geometry.

  2. Trajectory analysis via a geometric feature space approach

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Rintoul, Mark D.; Wilson, Andrew T.

    2015-10-05

    This study aimed to organize a body of trajectories in order to identify, search for and classify both common and uncommon behaviors among objects such as aircraft and ships. Existing comparison functions such as the Fréchet distance are computationally expensive and yield counterintuitive results in some cases. We propose an approach using feature vectors whose components represent succinctly the salient information in trajectories. These features incorporate basic information such as the total distance traveled and the distance between start/stop points as well as geometric features related to the properties of the convex hull, trajectory curvature and general distance geometry. Additionally,more » these features can generally be mapped easily to behaviors of interest to humans who are searching large databases. Most of these geometric features are invariant under rigid transformation. Furthermore, we demonstrate the use of different subsets of these features to identify trajectories similar to an exemplar, cluster a database of several hundred thousand trajectories and identify outliers.« less

  3. Feature Based Machining Process Planning V5.1

    Energy Science and Technology Software Center (OSTI)

    2001-07-30

    The purpose of the FB-Machining Advisor product is to provide industry with an end user product that will enable end users to more effectively interact with a solid model for manufacturing applications. The product allows end users to visualize and organize their manufacturing process plans as they are being conceived; avoid redundant and time consuming geometric construction and calculation; automate geometric reasoning processes, and automate downstream manufacturing applications. The product augments a solid model representationmore » of the part with a set of machining features (e.g., pockets, steps, holes, cutouts). The product also enables end users to interact with a solid model to create process plans. It will automatically recognize, or interactively create and modify surface based machining features (represented by sets of faces on the solid model) and volumetric machining features which are represented by delta volumes (solid bodies representing volumes of material to be removed from the part). The FB-Machining Advisor will generate “in process shapes” that represent the shape of the work piece prior or subsequent to a material removal operation. It is designed to facilitate process change propagation in order to minimize rework resulting from process modifications. The machining features will provide vital shape and tolerance information (i.e. depth of pocket, minimum side radius of pocket, diameter of hole, maximum surface finish of side walls). The FB-Machining Advisor also integrates solid model based (3 Dimensional) tolerance information with the machining feature representations.« less

  4. Features in the primordial power spectrum? A frequentist analysis

    SciTech Connect (OSTI)

    Hamann, Jan; Shafieloo, Arman; Souradeep, Tarun E-mail: a.shafieloo1@physics.ox.ac.uk

    2010-04-01

    Features in the primordial power spectrum have been suggested as an explanation for glitches in the angular power spectrum of temperature anisotropies measured by the WMAP satellite. However, these glitches might just as well be artifacts of noise or cosmic variance. Using the effective Δχ{sup 2} between the best-fit power-law spectrum and a deconvolved primordial spectrum as a measure of ''featureness'' of the data, we perform a full Monte-Carlo analysis to address the question of how significant the recovered features are. We find that in 26% of the simulated data sets the reconstructed spectrum yields a greater improvement in the likelihood than for the actually observed data. While features cannot be categorically ruled out by this analysis, and the possibility remains that simple theoretical models which predict some of the observed features might stand up to rigorous statistical testing, our results suggest that WMAP data are consistent with the assumption of a featureless power-law primordial spectrum.

  5. Microscale Confinement features in microfluidic devices can affect biofilm

    SciTech Connect (OSTI)

    Kumar, Aloke; Karig, David K; Neethirajan, Suresh; Acharya, Rajesh K; Mukherjee, Partha P; Retterer, Scott T; Doktycz, Mitchel John

    2013-01-01

    Biofilms are aggregations of microbes that are encased by extra-cellular polymeric substances (EPS) and adhere to surfaces and interfaces. Biofilm development on abiotic surfaces is a dynamic process, which typically proceeds through an initial phase of adhesion of plankntonic microbes to the substrate, followed by events such as growth, maturation and EPS secretion. However, the coupling of hydrodynamics, microbial adhesion and biofilm growth remain poorly understood. Here, we investigate the effect of semiconfined features on biofilm formation. Using a microfluidic device and fluorescent time-lapse microscopy, we establish that confinement features can significantly affect biofilm formation. Biofilm dynamics change not only as a function of confinement features, but also of the total fluid flow rate, and our combination of experimental results and numerical simulations reveal insights into the link between hydrodynamics and biofilm formation.

  6. SOLAR MAGNETIC TRACKING. IV. THE DEATH OF MAGNETIC FEATURES

    SciTech Connect (OSTI)

    Lamb, D. A.; Howard, T. A.; DeForest, C. E.; Parnell, C. E.; Welsch, B. T.

    2013-09-10

    The removal of magnetic flux from the quiet-Sun photosphere is important for maintaining the statistical steady state of the magnetic field there, for determining the magnetic flux budget of the Sun, and for estimating the rate of energy injected into the upper solar atmosphere. Magnetic feature death is a measurable proxy for the removal of detectable flux, either by cancellation (submerging or rising loops, or reconnection in the photosphere) or by dispersal of flux. We used the SWAMIS feature tracking code to understand how nearly 2 Multiplication-Sign 10{sup 4} magnetic features die in an hour-long sequence of Hinode/SOT/NFI magnetograms of a region of the quiet Sun. Of the feature deaths that remove visible magnetic flux from the photosphere, the vast majority do so by a process that merely disperses the previously detected flux so that it is too small and too weak to be detected, rather than completely eliminating it. The behavior of the ensemble average of these dispersals is not consistent with a model of simple planar diffusion, suggesting that the dispersal is constrained by the evolving photospheric velocity field. We introduce the concept of the partial lifetime of magnetic features, and show that the partial lifetime due to Cancellation of magnetic flux, 22 hr, is three times slower than previous measurements of the flux turnover time. This indicates that prior feature-based estimates of the flux replacement time may be too short, in contrast with the tendency for this quantity to decrease as resolution and instrumentation have improved. This suggests that dispersal of flux to smaller scales is more important for the replacement of magnetic fields in the quiet Sun than observed bipolar cancellation. We conclude that processes on spatial scales smaller than those visible to Hinode dominate the processes of flux emergence and cancellation, and therefore also the quantity of magnetic flux that threads the photosphere.

  7. New Features of the Hopper XE6 - Differences from Franklin

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Features of the Hopper XE6 New Features of the Hopper XE6 - Differences from Franklin While the Franklin and Hopper systems are both have similar programming environments and user software, there are some key architectural differences between the two systems. This page describes those differences and how they may improve your productivity. More Cores per Node and Multiple Sockets per Node Hopper has a total of 24 cores on each node. With more cores per node, you may want to explore adding

  8. Appendix SCR: Feature, Event, and Process Screening for PA

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SCR-2014 Feature, Event, and Process Screening for PA United States Department of Energy Waste Isolation Pilot Plant Carlsbad Field Office Carlsbad, New Mexico Compliance Recertification Application 2014 Appendix SCR-2014 Feature, Event, and Process Screening for PA Table of Contents SCR-1.0 Introduction SCR-2.0 Basis for FEPs Screening Process SCR-2.1 Requirement for FEPs SCR-2.2 FEPs List Development for the CCA SCR-2.3 Criteria for Screening of FEPs and Categorization of Retained FEPs

  9. Triaxial Stress Distributions in Cu / low-k Interconnect Features

    SciTech Connect (OSTI)

    C Murray; P Besser; E Ryan; J Jordan-Sweet

    2011-12-31

    The distribution of triaxial stresses within single damascene Cu/organosilicate interconnect structures as a function of linewidth, ranging from 45 to 250 nm, was measured using x-ray diffraction. Least-squares minimization techniques were employed to determine the volume-averaged stress tensors of the Cu features. Longitudinal Cu stress values increased for linewidths below 100 nm, while transverse stresses decreased with decreasing linewidth below 100 nm due to the interplay between the Cu microstructure and the feature geometry. Large tensile out-of-plane stresses were observed in all of the lines demonstrating the constraint imposed by the barrier layers that encapsulate the Cu.

  10. ORNL Lightweighting Research Featured on MotorWeek

    ScienceCinema (OSTI)

    None

    2014-06-03

    PBS MotorWeek, television's longest running automotive series, featured ORNL lightweighting research for vehicle applications in an episode that aired in early April 2014. The crew captured footage of research including development of new metal alloys, additive manufacturing, carbon fiber production, advanced batteries, power electronics components, and neutron imaging applications for materials evaluation.

  11. ORNL Lightweighting Research Featured on MotorWeek

    SciTech Connect (OSTI)

    2014-04-15

    PBS MotorWeek, television's longest running automotive series, featured ORNL lightweighting research for vehicle applications in an episode that aired in early April 2014. The crew captured footage of research including development of new metal alloys, additive manufacturing, carbon fiber production, advanced batteries, power electronics components, and neutron imaging applications for materials evaluation.

  12. Spatial feature tracking impedence sensor using multiple electric fields

    DOE Patents [OSTI]

    Novak, J.L.

    1998-08-11

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications. 10 figs.

  13. Spatial feature tracking impedence sensor using multiple electric fields

    DOE Patents [OSTI]

    Novak, James L.

    1998-01-01

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications.

  14. Biosensor method and system based on feature vector extraction

    DOE Patents [OSTI]

    Greenbaum, Elias; Rodriguez, Jr., Miguel; Qi, Hairong; Wang, Xiaoling

    2013-07-02

    A system for biosensor-based detection of toxins includes providing at least one time-dependent control signal generated by a biosensor in a gas or liquid medium, and obtaining a time-dependent biosensor signal from the biosensor in the gas or liquid medium to be monitored or analyzed for the presence of one or more toxins selected from chemical, biological or radiological agents. The time-dependent biosensor signal is processed to obtain a plurality of feature vectors using at least one of amplitude statistics and a time-frequency analysis. At least one parameter relating to toxicity of the gas or liquid medium is then determined from the feature vectors based on reference to the control signal.

  15. Biosensor method and system based on feature vector extraction

    DOE Patents [OSTI]

    Greenbaum, Elias; Rodriguez, Jr., Miguel; Qi, Hairong; Wang, Xiaoling

    2012-04-17

    A method of biosensor-based detection of toxins comprises the steps of providing at least one time-dependent control signal generated by a biosensor in a gas or liquid medium, and obtaining a time-dependent biosensor signal from the biosensor in the gas or liquid medium to be monitored or analyzed for the presence of one or more toxins selected from chemical, biological or radiological agents. The time-dependent biosensor signal is processed to obtain a plurality of feature vectors using at least one of amplitude statistics and a time-frequency analysis. At least one parameter relating to toxicity of the gas or liquid medium is then determined from the feature vectors based on reference to the control signal.

  16. ARM News &#187; Feature Stories and Releases

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7:55:06 +0000 http://www.arm.gov en Spying on Thin Ice Clouds Mon, 15 Aug 2016 07:55:06 +0000 Feature Stories and Releases http://www.arm.gov/news/features/post/37592 <img src="http://www.arm.gov/images/cms/15661178412_0d7ded2ba2_b.jpg:100w" style="float:left;margin-right:5px;margin-bottom:5px"/><p>Observations of thin ice clouds are scarce, contributing to a large range of uncertainties in present-day and future simulations of the polar climates. Data from the

  17. Identification of features in indexed data and equipment therefore

    DOE Patents [OSTI]

    Jarman, Kristin H [Richland, WA; Daly, Don Simone [Richland, WA; Anderson, Kevin K [Richland, WA; Wahl, Karen L [Richland, WA

    2002-04-02

    Embodiments of the present invention provide methods of identifying a feature in an indexed dataset. Such embodiments encompass selecting an initial subset of indices, the initial subset of indices being encompassed by an initial window-of-interest and comprising at least one beginning index and at least one ending index; computing an intensity weighted measure of dispersion for the subset of indices using a subset of responses corresponding to the subset of indices; and comparing the intensity weighted measure of dispersion to a dispersion critical value determined from an expected value of the intensity weighted measure of dispersion under a null hypothesis of no transient feature present. Embodiments of the present invention also encompass equipment configured to perform the methods of the present invention.

  18. Estimating Missing Features to Improve Multimedia Information Retrieval

    SciTech Connect (OSTI)

    Bagherjeiran, A; Love, N S; Kamath, C

    2006-09-28

    Retrieval in a multimedia database usually involves combining information from different modalities of data, such as text and images. However, all modalities of the data may not be available to form the query. The retrieval results from such a partial query are often less than satisfactory. In this paper, we present an approach to complete a partial query by estimating the missing features in the query. Our experiments with a database of images and their associated captions show that, with an initial text-only query, our completion method has similar performance to a full query with both image and text features. In addition, when we use relevance feedback, our approach outperforms the results obtained using a full query.

  19. Sandia Video Featured by DOE Bioenergy Technologies Office

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Video Featured by DOE Bioenergy Technologies Office - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste

  20. NREL Earth Day Celebration Features Energy Activities, Tours

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Features Energy Activities, Tours For more information contact: e:mail: Public Affairs Golden, Colo., April 12, 1999 — Celebrate Earth Day by discovering the power of clean energy at the nation's premier laboratory for renewable energy and energy efficiency research, development and deployment. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) will open its doors 10 a.m. to 3 p.m., April 24 for tours of its research facilities and interactive exhibits at the Visitors

  1. NASA features LLNL star-formation simulations | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration | (NNSA) NASA features LLNL star-formation simulations Friday, January 29, 2016 - 5:56pm NNSA Blog These high performance computing (HPC) simulations of star formation account for a broad range of physical processes, including: gravity, supersonic turbulence, hydrodynamics, outflows, magnetic fields, chemistry and ionizing and non-ionizing radiation. Image courtesy of Pak Shing Li/ University of California, Berkeley High performance computing (HPC) simulations exploring star

  2. Village Power Exhibit Featured at NREL's Visitors Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Village Power Exhibit Featured at NREL's Visitors Center "Powering Our Lives, Powering Our World Energy" Expo Slated for February-April For more information contact: Gary Schmitz, 303-275-4050 email: Gary Schmitz Golden, Colo., Feb. 16, 2001 - An exhibit that demonstrates how renewable energy sources can bring needed electricity to developing nations worldwide opens Feb. 20 at the Visitors Center of the U.S. Department of Energy's National Renewable Energy Laboratory. The Village Power

  3. An Ontology Design Pattern for Surface Water Features

    SciTech Connect (OSTI)

    Sinha, Gaurav; Mark, David; Kolas, Dave; Varanka, Dalia; Romero, Boleslo E; Feng, Chen-Chieh; Usery, Lynn; Liebermann, Joshua; Sorokine, Alexandre

    2014-01-01

    Surface water is a primary concept of human experience but concepts are captured in cultures and languages in many different ways. Still, many commonalities can be found due to the physical basis of many of the properties and categories. An abstract ontology of surface water features based only on those physical properties of landscape features has the best potential for serving as a foundational domain ontology. It can then be used to systematically incor-porate concepts that are specific to a culture, language, or scientific domain. The Surface Water ontology design pattern was developed both for domain knowledge distillation and to serve as a conceptual building-block for more complex surface water ontologies. A fundamental distinction is made in this on-tology between landscape features that act as containers (e.g., stream channels, basins) and the bodies of water (e.g., rivers, lakes) that occupy those containers. Concave (container) landforms semantics are specified in a Dry module and the semantics of contained bodies of water in a Wet module. The pattern is imple-mented in OWL, but Description Logic axioms and a detailed explanation is provided. The OWL ontology will be an important contribution to Semantic Web vocabulary for annotating surface water feature datasets. A discussion about why there is a need to complement the pattern with other ontologies, es-pecially the previously developed Surface Network pattern is also provided. Fi-nally, the practical value of the pattern in semantic querying of surface water datasets is illustrated through a few queries and annotated geospatial datasets.

  4. Features of an Atkinson two-stroke engine

    SciTech Connect (OSTI)

    Brooks, J.; Lane, A.

    1994-09-01

    A two-stroke Atkinson cycle engine is described. The engine has uniflow stratified mixture scavenging with a variably phased spherical rotary valve in the cylinder head and exhaust ports in the cylinder wall. These features combined in this configuration result in reduced fuel consumption, higher specific power output, less vibration, and smooth part load operation albeit increased size and cost compared to simple two-stroke engines used in power tools. 29 refs., 4 figs., 1 tab.

  5. Features of Good Scientific Writing | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Features of Good Scientific Writing "Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone." - Albert Einstein Striving for Clarity, Cohesion, and Conciseness Regardless of whether you are writing a lengthy report, a peer review, or an abstract, the objective of writing remains the same - to find the most direct path connecting your main message(s) to your reader. This path is shortest and most

  6. Identifying Transition State Features of Enzymatic Conformational Cycles |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Stanford Synchrotron Radiation Lightsource Identifying Transition State Features of Enzymatic Conformational Cycles Thursday, January 5, 2012 - 11:00am SSRL Conference Room 137-322 Dr. Dimitar Pachov, HHMI Research Associate, Kern's Group, Brandeis University, MA Due to their dynamic nature relevant to biological activity, biomolecules frequently interconvert between functional substates. Determining how these visits to different conformational states are physically characterized remains a

  7. Geographical features of global water cycle during warm geological epochs

    SciTech Connect (OSTI)

    Georgiadi, A.G.

    1996-12-31

    The impact of global warming on the water cycle can be extremely complex and diverse. The goal of the investigation was to estimate the geographic features of the mean annual water budget of the world during climatic optimums of the Holocene and the Eemian interglacial periods. These geological epochs could be used as analogs of climatic warming on 1 degree, centigrade and 2 degrees, centigrade. The author used the results of climatic reconstructions based on a simplified version of a GCM.

  8. Absorption Features in Spectra of Magnetized Neutron Stars

    SciTech Connect (OSTI)

    Suleimanov, V.; Hambaryan, V.; Neuhaeuser, R.; Potekhin, A. Y.; Pavlov, G. G.; Adelsberg, M. van; Werner, K.

    2011-09-21

    The X-ray spectra of some magnetized isolated neutron stars (NSs) show absorption features with equivalent widths (EWs) of 50-200 eV, whose nature is not yet well known.To explain the prominent absorption features in the soft X-ray spectra of the highly magnetized (B{approx}10{sup 14} G) X-ray dim isolated NSs (XDINSs), we theoretically investigate different NS local surface models, including naked condensed iron surfaces and partially ionized hydrogen model atmospheres, with semi-infinite and thin atmospheres above the condensed surface. We also developed a code for computing light curves and integral emergent spectra of magnetized neutron stars with various temperature and magnetic field distributions over the NS surface. We compare the general properties of the computed and observed light curves and integral spectra for XDINS RBS 1223 and conclude that the observations can be explained by a thin hydrogen atmosphere above the condensed iron surface, while the presence of a strong toroidal magnetic field component on the XDINS surface is unlikely.We suggest that the harmonically spaced absorption features in the soft X-ray spectrum of the central compact object (CCO) 1E 1207.4-5209 (hereafter 1E 1207) correspond to peaks in the energy dependence of the free-free opacity in a quantizing magnetic field, known as quantum oscillations. To explore observable properties of these quantum oscillations, we calculate models of hydrogen NS atmospheres with B{approx}10{sup 10}-10{sup 11} G(i.e., electron cyclotron energy E{sub c,e}{approx}0.1-1 keV) and T{sub eff} = 1-3 MK. Such conditions are thought to be typical for 1E 1207. We show that observable features at the electron cyclotron harmonics with EWs {approx_equal}100-200 eV can arise due to these quantum oscillations.

  9. JBEI Featured in Chemical & Engineering News Cover Article

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured in Chemical & Engineering News Cover Article - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste

  10. Sandia Research Featured on Journal of Physical Chemistry A Cover

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Featured on Journal of Physical Chemistry A Cover - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste

  11. Intrinsic Feature-Based Pose Measurement for Medical Imaging Motion

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Compensation - Energy Innovation Portal Find More Like This Return to Search Intrinsic Feature-Based Pose Measurement for Medical Imaging Motion Compensation Oak Ridge National Laboratory Contact ORNL About This Technology Publications: PDF Document Publication 11-G00260_ID2341.pdf (497 KB) Technology Marketing SummaryTomographic imaging of awake, unrestrained animals or humans during a scan can result in blurring and unusable 3D images due to movement by the subject. This invention

  12. This Month's Feature on .EDU Connections: Iowa State University |

    Broader source: Energy.gov (indexed) [DOE]

    College | Department of Energy The work of students at Central Carolina Community College (CCCC) is powering the school -- literally. Students are constructing a testing plant to produce biofuels, which will fuel college vehicles and equipment. CCCC offers a variety of scientific and technical programs with an emphasis on sustainable energy technologies. This month, CCCC is being featured on .EDU connections, a site hosted by Office of Science and Technical Information that spotlights

  13. Special Feature: Energy - The Spark that Ignited DOE Supercomputing

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Energy - The Spark that Ignited DOE Supercomputing Special Feature: Energy - The Spark that Ignited DOE Supercomputing Scientific Computing for Energy Independence and a Clean Energy Future September 16, 2013 Contact: Linda Vu, lvu@lbl.gov, +1 510 495 2402 1280px-OREGONSODD-EVENPLANREDUCEDTHELINESATGASSTATIONSDURINGTHEFUELCRISISINTHEFALLANDWINTEROF1973-74....-NARA-555498.jpg Oregon's odd-even plan reduced the lines at gas stations during the fuel crisis in the fall and winter of 1973-74. This

  14. This Month's Feature on .EDU Connections: Central Carolina Community

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    College | Department of Energy EDU Connections: Central Carolina Community College This Month's Feature on .EDU Connections: Central Carolina Community College January 13, 2011 - 3:36pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs The work of students at Central Carolina Community College (CCCC) is powering the school -- literally. Students are constructing a testing plant to produce biofuels, which will fuel college vehicles and equipment. CCCC offers a

  15. This Month's Feature on .EDUconnections: University of Wisconsin-Madison |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy EDUconnections: University of Wisconsin-Madison This Month's Feature on .EDUconnections: University of Wisconsin-Madison April 15, 2011 - 3:10pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs This month, .EDUconnections, puts the spotlight on the University of Wisconsin. UW-Madison ranks as one of the most prolific research universities in the world, providing a learning environment where faculty, staff and students can critically

  16. DOE Science Showcase - Featured Climate Change Research from DOE Databases

    Office of Scientific and Technical Information (OSTI)

    | OSTI, US Dept of Energy Office of Scientific and Technical Information Featured Climate Change Research from DOE Databases Search Results from DOE Databases View research documents, citations, accomplishments, patents, and projects related to climate change, one of the primary scientific challenges addressed through the Incite Program. Climate Change Information Bridge Energy Citations Database DOE R&D Accomplishments Database DOE Data Explorer Climate Modeling Information Bridge

  17. NREL: A Year in Clean Energy Innovations; A Review of NREL's 2011 Feature Stories

    SciTech Connect (OSTI)

    Not Available

    2012-04-01

    This document is a compilation of articles featuring NREL research and development, deployment, commercialization, and outreach activities in 2011. The feature stories can be found online at http:www.nrel.gov/features/.

  18. Deep PDF parsing to extract features for detecting embedded malware.

    SciTech Connect (OSTI)

    Munson, Miles Arthur; Cross, Jesse S.

    2011-09-01

    The number of PDF files with embedded malicious code has risen significantly in the past few years. This is due to the portability of the file format, the ways Adobe Reader recovers from corrupt PDF files, the addition of many multimedia and scripting extensions to the file format, and many format properties the malware author may use to disguise the presence of malware. Current research focuses on executable, MS Office, and HTML formats. In this paper, several features and properties of PDF Files are identified. Features are extracted using an instrumented open source PDF viewer. The feature descriptions of benign and malicious PDFs can be used to construct a machine learning model for detecting possible malware in future PDF files. The detection rate of PDF malware by current antivirus software is very low. A PDF file is easy to edit and manipulate because it is a text format, providing a low barrier to malware authors. Analyzing PDF files for malware is nonetheless difficult because of (a) the complexity of the formatting language, (b) the parsing idiosyncrasies in Adobe Reader, and (c) undocumented correction techniques employed in Adobe Reader. In May 2011, Esparza demonstrated that PDF malware could be hidden from 42 of 43 antivirus packages by combining multiple obfuscation techniques [4]. One reason current antivirus software fails is the ease of varying byte sequences in PDF malware, thereby rendering conventional signature-based virus detection useless. The compression and encryption functions produce sequences of bytes that are each functions of multiple input bytes. As a result, padding the malware payload with some whitespace before compression/encryption can change many of the bytes in the final payload. In this study we analyzed a corpus of 2591 benign and 87 malicious PDF files. While this corpus is admittedly small, it allowed us to test a system for collecting indicators of embedded PDF malware. We will call these indicators features throughout

  19. Photovoltaic building sheathing element with anti-slide features

    SciTech Connect (OSTI)

    Keenihan, James R.; Langmaid, Joseph A.; Lopez, Leonardo C.

    2015-09-08

    The present invention is premised` upon an assembly that includes at least a photovoltaic building sheathing element capable of being affixed on a building structure, the photovoltaic building sheathing element. The element including a photovoltaic cell assembly, a body portion attached to one or more portions of the photovoltaic cell assembly; and at feast a first and a second connector assembly capable of directly or indirectly electrically connecting the photovoltaic cell assembly to one or more adjoining devices; wherein the body portion includes one or more geometric features adapted to engage a vertically adjoining device before installation.

  20. Special Feature: Reducing Energy Costs with Better Batteries

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reducing Energy Costs with Better Batteries Special Feature: Reducing Energy Costs with Better Batteries September 9, 2013 Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov Electricvehicles8331019248.jpg Electric vehicles lined up in Cascade Locks. Credit: Oregon Department of Transportation A better battery-one that is cheap and safe, but packs a lot of power-could lead to an electric vehicle that performs better than today's gasoline-powered cars, and costs about the same or less to consumers.

  1. 5f Magnetism--Specific Features And Boundaries

    SciTech Connect (OSTI)

    Havela, Ladislav; Maskova, Silvie; Adamska, Anna; Pesicka, J.; Andreev, Alexander V.; Shick, Alexander; Gouder, Thomas; Kim-Ngan, N.-H.; Balogh, Adam G.

    2011-06-30

    Magnetism of light actinides exhibits fascinating and potentially useful features. One of them is a giant anisotropy of the two-ion type, apparent mostly in U-based systems. Here we demonstrate on the example of U{sub 2}Ni{sub 2}Sn and its hydride the anisotropy switches over the direction of U moments on a very fine scale. The study of amorphous sputter deposited UFe{sub x} films reveals how the Curie temperature can be tuned so as to exceed the room temperature.

  2. SolarPILOT Feature Requests and Collaboration | Concentrating Solar Power |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NREL SolarPILOT Feature Requests and Collaboration NREL works with the DOE to identify priority areas for continued SolarPILOT(tm) and SolTrace(tm) development. This work is rigorously reviewed and competitively awarded under the SunShot National Laboratory Multiyear Partnership (SuNLaMP) proposal development process, and the development work resulting from this process reflects the assessment by NREL and DOE of the CSP community's needs. If users are interested in working with NREL to

  3. Primordial features due to a step in the inflaton potential

    SciTech Connect (OSTI)

    Hazra, Dhiraj Kumar; Sriramkumar, L.; Aich, Moumita; Souradeep, Tarun; Jain, Rajeev Kumar E-mail: moumita@iucaa.ernet.in E-mail: sriram@hri.res.in

    2010-10-01

    Certain oscillatory features in the primordial scalar power spectrum are known to provide a better fit to the outliers in the cosmic microwave background data near the multipole moments of l = 22 and 40. These features are usually generated by introducing a step in the popular, quadratic potential describing the canonical scalar field. Such a model will be ruled out, if the tensors remain undetected at a level corresponding to a tensor-to-scalar ratio of, say, r ≅ 0.1. In this work, in addition to the popular quadratic potential, we investigate the effects of the step in a small field model and a tachyon model. With possible applications to future datasets (such as PLANCK) in mind, we evaluate the tensor power spectrum exactly, and include its contribution in our analysis. We compare the models with the WMAP (five as well as seven-year), the QUaD and the ACBAR data. As expected, a step at a particular location and of a suitable magnitude and width is found to improve the fit to the outliers (near l = 22 and 40) in all these cases. We point out that, if the tensors prove to be small (say, r∼<0.01), the quadratic potential and the tachyon model will cease to be viable, and more attention will need to be paid to examples such as the small field models.

  4. THE THOMSON SURFACE. III. TRACKING FEATURES IN 3D

    SciTech Connect (OSTI)

    Howard, T. A.; DeForest, C. E.; Tappin, S. J.; Odstrcil, D.

    2013-03-01

    In this, the final installment in a three-part series on the Thomson surface, we present simulated observations of coronal mass ejections (CMEs) observed by a hypothetical polarizing white light heliospheric imager. Thomson scattering yields a polarization signal that can be exploited to locate observed features in three dimensions relative to the Thomson surface. We consider how the appearance of the CME changes with the direction of trajectory, using simulations of a simple geometrical shape and also of a more realistic CME generated using the ENLIL model. We compare the appearance in both unpolarized B and polarized pB light, and show that there is a quantifiable difference in the measured brightness of a CME between unpolarized and polarized observations. We demonstrate a technique for using this difference to extract the three-dimensional (3D) trajectory of large objects such as CMEs. We conclude with a discussion on how a polarizing heliospheric imager could be used to extract 3D trajectory information about CMEs or other observed features.

  5. Fundamental enabling issues in nanotechnology : (Technical Report...

    Office of Scientific and Technical Information (OSTI)

    Stresses generated during thin film growth strongly influence component lifetime and performance; stress has also been proposed as a mechanism for stabilizing supported nanoscale ...

  6. Fundamental enabling issues in nanotechnology : (Technical Report...

    Office of Scientific and Technical Information (OSTI)

    Yet the intrinsic connections between the evolving morphology of supported nanostructures and stress generation are still a matter of debate. This report presents results from a ...

  7. Challenges and opportunities for structural DNA nanotechnology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    In particular, we highlight the potential use of DNA nanostructures in molecular and cellular biophysics, as biomimetic systems, in energy transfer and photonics, and in ...

  8. National Nanotechnology Initiative's Signature Initiative Sustainable...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NSF NIH OMB OSTP DHS NRC FDA CPSC ITC USPTO NIOSH DOCBIS USDAFS DOEd DOL DOD DOE NASA ... Agencies involved: DOD, DOE, EPA, ICDNI, NASA, NIH, NIOSH, NIST, NSF, OSHA, USDAFS ...

  9. Solar Cell Nanotechnology Final Technical Report

    SciTech Connect (OSTI)

    Das, Biswajit

    2014-05-07

    The objective of this project is to develop a low cost nonlithographic nanofabrication technology for the fabrication of thin film porous templates as well as uniform arrays of semiconductor nanostructures for the implementation of high efficiency solar cells. Solar cells based on semiconductor nanostructures are expected to have very high energy conversion efficiencies due to the increased absorption coefficients of semiconductor nanostructures. In addition, the thin film porous template can be used for optimum surface texturing of solar cells leading to additional enhancement in energy conversion efficiency. An important requirement for these applications is the ability to synthesize nanostructure arrays of different dimensions with good size control. This project employed nanoporous alumina templates created by the anodization of aluminum thin films deposited on glass substrates for the fabrication of the nanostructures and optimized the process parameters to obtain uniform pore diameters. An additional requirement is uniformity or regularity of the nanostructure arrays. While constant current anodization was observed to provide controlled pore diameters, constant voltage anodization was needed for regularity of the nanostructure arrays. Thus a two-step anodization process was investigated and developed in this project for improving the pore size distribution and pore periodicity of the nanoporous alumina templates. CdTe was selected to be the active material for the nanowires, and the process for the successful synthesis of CdTe nanowires was developed in this project. Two different synthesis approaches were investigated in this project, electrochemical and electrophoretic deposition. While electrochemical synthesis was successfully employed for the synthesis of nanowires inside the pores of the alumina templates, the technique was determined to be non-optimum due to the need of elevated temperature that is detrimental to the structural integrity of the nanoporous alumina templates. In order to eliminate this problem, electrophoretic deposition was selected as the more appropriate technique, which involves the guided deposition of semiconductor nanoparticles in the presence of ultrasonic energy to form the crystalline nanowires. Extensive experimental research was carried out to optimize the process parameters for formation of crystalline nanowires. It was observed that the environmental bath temperature plays a critical role in determining the structural integrity of the nanowires and hence their lengths. Investigation was carried out for the formation of semitransparent ohmic contacts on the nanowires to facilitate photocurrent spectroscopy measurements as well as for solar cell implementation. Formation of such ohmic contacts was found to be challenging and a process involving mechanical and electrochemical polishing was developed to facilitate such contacts. The use of nanoporous alumina templates for the surface texturing of mono- and multi-crystalline solar cells was extensively investigated by electrochemical etching of the silicon through the pores of the nanoporous templates. The processes for template formation as well as etching were optimized and the alumina/silicon interface was investigated using capacitance-voltage characterization. The process developed was found to be viable for improving solar cell performance.

  10. Tools for Nanotechnology Education Development Program

    SciTech Connect (OSTI)

    Dorothy Moore

    2010-09-27

    The overall focus of this project was the development of reusable, cost-effective educational modules for use with the table top scanning electron microscope (TTSEM). The goal of this project's outreach component was to increase students' exposure to the science and technology of nanoscience.

  11. Non-contact feature detection using ultrasonic Lamb waves

    DOE Patents [OSTI]

    Sinha, Dipen N.

    2011-06-28

    Apparatus and method for non-contact ultrasonic detection of features on or within the walls of hollow pipes are described. An air-coupled, high-power ultrasonic transducer for generating guided waves in the pipe wall, and a high-sensitivity, air-coupled transducer for detecting these waves, are disposed at a distance apart and at chosen angle with respect to the surface of the pipe, either inside of or outside of the pipe. Measurements may be made in reflection or transmission modes depending on the relative position of the transducers and the pipe. Data are taken by sweeping the frequency of the incident ultrasonic waves, using a tracking narrow-band filter to reduce detected noise, and transforming the frequency domain data into the time domain using fast Fourier transformation, if required.

  12. Generic features of Einstein-Aether black holes

    SciTech Connect (OSTI)

    Tamaki, Takashi; Miyamoto, Umpei

    2008-01-15

    We reconsider spherically symmetric black hole solutions in Einstein-Aether theory with the condition that this theory has identical parametrized post-Newtonian parameters as those for general relativity, which is the main difference from the previous research. In contrast with previous study, we allow superluminal propagation of a spin-0 Aether-gravity wave mode. As a result, we obtain black holes having a spin-0 'horizon' inside an event horizon. We allow a singularity at a spin-0 horizon since it is concealed by the event horizon. If we allow such a configuration, the kinetic term of the Aether field can be large enough for black holes to be significantly different from Schwarzschild black holes with respect to Arnowitt-Deser-Misner mass, innermost stable circular orbit, Hawking temperature, and so on. We also discuss whether or not the above features can be seen in more generic vector-tensor theories.

  13. Multispectral image feature fusion for detecting land mines

    SciTech Connect (OSTI)

    Clark, G.A.; Fields, D.J.; Sherwood, R.J.

    1994-11-15

    Our system fuses information contained in registered images from multiple sensors to reduce the effect of clutter and improve the the ability to detect surface and buried land mines. The sensor suite currently consists if a camera that acquires images in sixible wavelength bands, du, dual-band infrared (5 micron and 10 micron) and ground penetrating radar. Past research has shown that it is extremely difficult to distinguish land mines from background clutter in images obtained from a single sensor. It is hypothesized, however, that information fused from a suite of various sensors is likely to provide better detection reliability, because the suite of sensors detects a variety of physical properties that are more separate in feature space. The materials surrounding the mines can include natural materials (soil, rocks, foliage, water, holes made by animals and natural processes, etc.) and some artifacts.

  14. FEATURES, EVENTS, AND PROCESSES: SYSTEM-LEVEL AND CRITICALITY

    SciTech Connect (OSTI)

    D.L. McGregor

    2000-12-20

    The primary purpose of this Analysis/Model Report (AMR) is to identify and document the screening analyses for the features, events, and processes (FEPs) that do not easily fit into the existing Process Model Report (PMR) structure. These FEPs include the 3 1 FEPs designated as System-Level Primary FEPs and the 22 FEPs designated as Criticality Primary FEPs. A list of these FEPs is provided in Section 1.1. This AMR (AN-WIS-MD-000019) documents the Screening Decision and Regulatory Basis, Screening Argument, and Total System Performance Assessment (TSPA) Disposition for each of the subject Primary FEPs. This AMR provides screening information and decisions for the TSPA-SR report and provides the same information for incorporation into a project-specific FEPs database. This AMR may also assist reviewers during the licensing-review process.

  15. Features, Events and Processes in UZ Flow and Transport

    SciTech Connect (OSTI)

    P. Persoff

    2005-08-04

    The purpose of this report is to evaluate and document the inclusion or exclusion of the unsaturated zone (UZ) features, events, and processes (FEPs) with respect to modeling that supports the total system performance assessment (TSPA) for license application (LA) for a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either Included or Excluded, is given for each FEP, along with the technical basis for the screening decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) in 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs deal with UZ flow and radionuclide transport, including climate, surface water infiltration, percolation, drift seepage, and thermally coupled processes. This analysis summarizes the implementation of each FEP in TSPA-LA (that is, how the FEP is included) and also provides the technical basis for exclusion from TSPA-LA (that is, why the FEP is excluded). This report supports TSPA-LA.

  16. Features, Events, and Processes in UZ and Transport

    SciTech Connect (OSTI)

    P. Persoff

    2004-11-06

    The purpose of this report is to evaluate and document the inclusion or exclusion of the unsaturated zone (UZ) features, events, and processes (FEPs) with respect to modeling that supports the total system performance assessment (TSPA) for license application (LA) for a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either ''Included'' or ''Excluded'', is given for each FEP, along with the technical basis for the screening decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) in 10 CFR 63.114 (d, e, and f) [DIRS 156605]. The FEPs deal with UZ flow and radionuclide transport, including climate, surface water infiltration, percolation, drift seepage, and thermally coupled processes. This analysis summarizes the implementation of each FEP in TSPA-LA (that is, how the FEP is included) and also provides the technical basis for exclusion from TSPA-LA (that is, why the FEP is excluded). This report supports TSPA-LA.

  17. Features of MCNP6 Relevant to Medical Radiation Physics

    SciTech Connect (OSTI)

    Hughes, H. Grady III; Goorley, John T.

    2012-08-29

    MCNP (Monte Carlo N-Particle) is a general-purpose Monte Carlo code for simulating the transport of neutrons, photons, electrons, positrons, and more recently other fundamental particles and heavy ions. Over many years MCNP has found a wide range of applications in many different fields, including medical radiation physics. In this presentation we will describe and illustrate a number of significant recently-developed features in the current version of the code, MCNP6, having particular utility for medical physics. Among these are major extensions of the ability to simulate large, complex geometries, improvement in memory requirements and speed for large lattices, introduction of mesh-based isotopic reaction tallies, advances in radiography simulation, expanded variance-reduction capabilities, especially for pulse-height tallies, and a large number of enhancements in photon/electron transport.

  18. Centrifugal Casting Features/Metallurgical Characterization of Aluminum Alloys

    SciTech Connect (OSTI)

    Chirita, G.; Soares, D.; Cruz, D.; Silva, F. S. [Mechanical Engineering Department, School of Engineering, Minho University (Portugal); Stefanescu, I. [Faculty of Mechanical Engineering, Dunarea de Jos University Galati (Romania)

    2008-02-15

    This paper deals with the study of centrifugal effects on aluminium castings under high G values. Most of the studies in this domain (FGMs obtained by centrifugal casting) deal with functionally graded composites reinforced with a solid phase such as silicon particles or others. However, in this study it will be shown that unreinforced aluminium alloys may be significantly influenced by the centrifugal effect and that functionally graded castings are also obtained. It has been observed that the centrifugal effect may increase in some alloys, depending on the relative position in the castings, the rupture strength by approx. 50%, and rupture strain by about 300%, as compared to the gravity casting technique. The Young's modulus may also increase by about 20%. It has also been reported that in vertical centrifugal castings there are mainly three aspects that affect the components thus obtained, namely: fluid dynamics; vibration (inherent to the system); and centrifugal force. These features have a different effect on the castings depending on the aluminium alloy. In this paper, an analysis of the most important effects of the centrifugal casting process on metallurgical features is conducted. A solidification characterization at several points along the mould will be made in order to have an accurate idea of both the fluid dynamics inside the mould during the casting and the solidification behavior in different parts of the component. These two analyses will be related to the metallurgical properties (phase distribution; SDAS; eutectic silicon content and shape, pores density and shape) along the component and mainly along the direction of the centrifugal pressure. A comparison between castings obtained by both centrifugal casting technique and gravity casting technique is made for reference (gravity casting)

  19. Automated feature detection and identification in digital point-ordered signals

    DOE Patents [OSTI]

    Oppenlander, Jane E.; Loomis, Kent C.; Brudnoy, David M.; Levy, Arthur J.

    1998-01-01

    A computer-based automated method to detect and identify features in digital point-ordered signals. The method is used for processing of non-destructive test signals, such as eddy current signals obtained from calibration standards. The signals are first automatically processed to remove noise and to determine a baseline. Next, features are detected in the signals using mathematical morphology filters. Finally, verification of the features is made using an expert system of pattern recognition methods and geometric criteria. The method has the advantage that standard features can be, located without prior knowledge of the number or sequence of the features. Further advantages are that standard features can be differentiated from irrelevant signal features such as noise, and detected features are automatically verified by parameters extracted from the signals. The method proceeds fully automatically without initial operator set-up and without subjective operator feature judgement.

  20. Comparing Shape and Texture Features for Pattern Recognition in Simulation Data

    SciTech Connect (OSTI)

    Newsam, S; Kamath, C

    2004-12-10

    Shape and texture features have been used for some time for pattern recognition in datasets such as remote sensed imagery, medical imagery, photographs, etc. In this paper, we investigate shape and texture features for pattern recognition in simulation data. In particular, we explore which features are suitable for characterizing regions of interest in images resulting from fluid mixing simulations. Three texture features--gray level co-occurrence matrices, wavelets, and Gabor filters--and two shape features--geometric moments and the angular radial transform--are compared. The features are evaluated using a similarity retrieval framework. Our preliminary results indicate that Gabor filters perform the best among the texture features and the angular radial transform performs the best among the shape features. The feature which performs the best overall is dependent on how the groundtruth dataset is created.

  1. DUSTY WINDS: EXTRAPLANAR POLYCYCLIC AROMATIC HYDROCARBON FEATURES OF NEARBY GALAXIES

    SciTech Connect (OSTI)

    McCormick, Alexander; Veilleux, Sylvain; Rupke, David S. N. E-mail: veilleux@astro.umd.edu

    2013-09-10

    Recent observations have shown the presence of dust and molecular material in galactic winds, but relatively little is known about the distribution of these outflow components. To shed some light on this issue, we have used IRAC images from the Spitzer Space Telescope archive to investigate polycyclic aromatic hydrocarbon (PAH) emission from a sample of 16 local galaxies with known winds. Our focus on nearby sources (median distance 8.6 Mpc) has revealed detailed PAH structure in the winds and allowed us to measure extraplanar PAH emission. We have identified extraplanar PAH features on scales of {approx}0.8-6.0 kpc. We find a nearly linear correlation between the amount of extraplanar PAH emission and the total infrared flux, a proxy for star formation activity in the disk. Our results also indicate a correlation between the height of extraplanar PAH emission and star formation rate surface density, which supports the idea of a surface density threshold on the energy or momentum injection rate for producing detectable extraplanar wind material.

  2. Basic features of the pion valence-quark distribution function

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Chang, Lei; Mezrag, Cdric; Moutarde, Herv; Roberts, Craig D.; Rodrguez-Quintero, Jose; Tandy, Peter C.

    2014-10-07

    The impulse-approximation expression used hitherto to define the pion's valence-quark distribution function is flawed because it omits contributions from the gluons which bind quarks into the pion. A corrected leading-order expression produces the model-independent result that quarks dressed via the rainbowladder truncation, or any practical analogue, carry all the pion's light-front momentum at a characteristic hadronic scale. Corrections to the leading contribution may be divided into two classes, responsible for shifting dressed-quark momentum into glue and sea-quarks. Working with available empirical information, we use an algebraic model to express the principal impact of both classes of corrections. This enables amorerealistic comparison with experiment that allows us to highlight the basic features of the pion's measurable valence-quark distribution, q?(x); namely, at a characteristic hadronic scale, q?(x)~(1-x)2 for x?0.85; and the valence-quarks carry approximately two-thirds of the pion's light-front momentum.less

  3. Features, Events, and Processes in SZ Flow and Transport

    SciTech Connect (OSTI)

    K. Economy

    2004-11-16

    This analysis report evaluates and documents the inclusion or exclusion of the saturated zone (SZ) features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for license application (LA) of a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either ''Included'' or ''Excluded'', is given for each FEP along with the technical basis for the decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d), (e), (f) (DIRS 156605). This scientific report focuses on FEP analysis of flow and transport issues relevant to the SZ (e.g., fracture flow in volcanic units, anisotropy, radionuclide transport on colloids, etc.) to be considered in the TSPA model for the LA. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded).

  4. Features, Events, and Processes in SZ Flow and Transport

    SciTech Connect (OSTI)

    S. Kuzio

    2005-08-20

    This analysis report evaluates and documents the inclusion or exclusion of the saturated zone (SZ) features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for license application (LA) of a nuclear waste repository at Yucca Mountain, Nevada. A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for the decision. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.11(d), (e), (f) [DIRS 173273]. This scientific report focuses on FEP analysis of flow and transport issues relevant to the SZ (e.g., fracture flow in volcanic units, anisotropy, radionuclide transport on colloids, etc.) to be considered in the TSPA model for the LA. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded).

  5. Improved searching for spatial features in spatio-temporal data

    SciTech Connect (OSTI)

    Stockinger, Kurt; Wu, Kesheng

    2004-09-27

    Scientific data analysis often requires mining large databases or data warehouses to find features in space. One important task is to find regions of interest such as stellar objects in astrophysics or flame fronts in combustion studies. Typically, this task is performed in two steps. The first step (searching) identifies records satisfying certain conditions specified by the user and outputs a set of cells. The second step (region-growing) groups these cells into connected regions. Most common approaches essentially perform a brute-force scan for these arching step. A number of indexing schemes have been proposed to speed up the searching step. Because they usually also slow down the region-growing step, these schemes have not reduced the overall time. In this article, we propose an approach based on compressed bitmap indices. Our approach speeds up not only the searching step, but also the region-growing step. In the literature, the time complexity of the region-growing step is demonstrated to be linear in the number of records in the dataset. In our tests, we show that the response time of our region-growing algorithm is linear in the number of records close to the surface of the regions of interest which is a small subset of all cells.

  6. Nickel-hydrogen battery with oxygen and electrolyte management features

    DOE Patents [OSTI]

    Sindorf, John F.

    1991-10-22

    A nickel-hydrogen battery or cell having one or more pressure vessels containing hydrogen gas and a plurality of cell-modules therein. Each cell-module includes a configuration of cooperatively associated oxygen and electrolyte mangement and component alignment features. A cell-module having electrolyte includes a negative electrode, a positive electrode adapted to facilitate oxygen diffusion, a separator disposed between the positive and negative electrodes for separating them and holding electrolyte for ionic conductivity, an absorber engaging the surface of the positive electrode facing away from the separator for providing electrolyte to the positive electrode, and a pair of surface-channeled diffusion screens for enclosing the positive and negative electrodes, absorber, and separator and for maintaining proper alignment of these components. The screens, formed in the shape of a pocket by intermittently sealing the edges together along as many as three sides, permit hydrogen gas to diffuse therethrough to the negative electrodes, and prevent the edges of the separator from swelling. Electrolyte is contained in the cell-module, absorbhed by the electrodes, the separator and the absorber.

  7. Imaging trace element distributions in single organelles and subcellular features

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kashiv, Yoav; Austin, Jotham R.; Lai, Barry; Rose, Volker; Vogt, Stefan; El-Muayed, Malek

    2016-02-25

    The distributions of chemical elements within cells are of prime importance in a wide range of basic and applied biochemical research. An example is the role of the subcellular Zn distribution in Zn homeostasis in insulin producing pancreatic beta cells and the development of type 2 diabetes mellitus. We combined transmission electron microscopy with micro- and nano-synchrotron X-ray fluorescence to image unequivocally for the first time, to the best of our knowledge, the natural elemental distributions, including those of trace elements, in single organelles and other subcellular features. Detected elements include Cl, K, Ca, Co, Ni, Cu, Zn and Cdmore » (which some cells were supplemented with). Cell samples were prepared by a technique that minimally affects the natural elemental concentrations and distributions, and without using fluorescent indicators.We find it could likely be applied to all cell types and provide new biochemical insights at the single organelle level not available from organelle population level studies.« less

  8. SU-E-J-237: Image Feature Based DRR and Portal Image Registration...

    Office of Scientific and Technical Information (OSTI)

    SU-E-J-237: Image Feature Based DRR and Portal Image Registration Citation Details In-Document Search Title: SU-E-J-237: Image Feature Based DRR and Portal Image Registration ...

  9. Day Three of 2012 ARPA-E Summit Will Feature President Bill Clinton...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Three of 2012 ARPA-E Summit Will Feature President Bill Clinton, ARPA-E Director Majumdar, and America's Top Energy Thought Leaders Day Three of 2012 ARPA-E Summit Will Feature ...

  10. A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA (Journal...

    Office of Scientific and Technical Information (OSTI)

    A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA Citation Details In-Document Search Title: A STUDY OF CARBON FEATURES IN TYPE Ia SUPERNOVA SPECTRA One of the major ...

  11. NREL: A Year in Clean Energy Innovations: A Review of NREL's Feature Stories

    SciTech Connect (OSTI)

    Not Available

    2010-01-01

    The publication is a compilation of various feature stories published on NREL's public Web site, nrel.gov, throughout 2009.

  12. Features, Events and Processes for the Used Fuel Disposition Campaign

    SciTech Connect (OSTI)

    Blink, J A; Greenberg, H R; Caporuscio, F A; Houseworth, J E; Freeze, G A; Mariner, P; Cunnane, J C

    2010-12-15

    The Used Fuel Disposition (UFD) Campaign within DOE-NE is evaluating storage and disposal options for a range of waste forms and a range of geologic environments. To assess the potential performance of conceptual repository designs for the combinations of waste form and geologic environment, a master set of Features, Events, and Processes (FEPs) has been developed and evaluated. These FEPs are based on prior lists developed by the Yucca Mountain Project (YMP) and the international repository community. The objective of the UFD FEPs activity is to identify and categorize FEPs that are important to disposal system performance for a variety of disposal alternatives (i.e., combinations of waste forms, disposal concepts, and geologic environments). FEP analysis provides guidance for the identification of (1) important considerations in disposal system design, and (2) gaps in the technical bases. The UFD FEPs also support the development of performance assessment (PA) models to evaluate the long-term performance of waste forms in the engineered and geologic environments of candidate disposal system alternatives. For the UFD FEP development, five waste form groups and seven geologic settings are being considered. A total of 208 FEPs have been identified, categorized by the physical components of the waste disposal system as well as cross-cutting physical phenomena. The combination of 35 waste-form/geologic environments and 208 FEPs is large; however, some FEP evaluations can cut across multiple waste/environment combinations, and other FEPs can be categorized as not-applicable for some waste/environment combinations, making the task of FEP evaluation more tractable. A FEP status tool has been developed to document progress. The tool emphasizes three major areas that can be statused numerically. FEP Applicability documents whether the FEP is pertinent to a waste/environment combination. FEP Completion Status documents the progress of the evaluation for the FEP

  13. Structure of continental rifts: Role of older features and magmatism

    SciTech Connect (OSTI)

    Keller, G.R.

    1996-12-31

    Recent geological and geophysical studies in several continental rifts have begun to shed light on the details of the processes which govern the structural evolution of these important exploration targets. In Kenya and Tanzania, the classic East African rift has been the object of several investigations which reveal that its location follows the boundary (suture ?) between the Tanzanian craton (Archean) and Mozambiquan belt (Proterozoic), The Baikal rift also follows a similar boundary, and the Mid-continent rift of North America appears to do the same. Rifts themselves often act as zones of weakness which are reactivated by younger tectonic regimes. The classic North American example of this effect is the Eocambrian Southern Oklahoma aulacogen which was deformed to create the Anadarko basin and Wichita uplift in the late Paleozoic. The Central basin platform has a similar history although the original rift formed at {approximately}1,100Ma. Integration of geophysical data with petrologic and geochemical data from several rift zones has also provided a new picture of the nature and extent of magmatic modification of the crust. An interesting contradiction is that Phanerozoic rifts, except the Afar region, show little evidence for major magmatic modification of the crust whereas, at least in North America, many Precambrian rifts are associated with very large mafic bodies in the crust. The Kenya rift displays evidence for modification of the lower crust in a two-phase magmatic history, but upper crustal magmatic features are limited to local intrusions associated with volcanoes. In this rift, complex basement structure plays a much more important role than previously realized, and the geophysical signatures of basement structure and magmatism are easy to confuse. If this is also the case in other rifts, additional rift basins remain to be discovered.

  14. Structure of continental rifts: Role of older features and magmatism

    SciTech Connect (OSTI)

    Keller, G.R. )

    1996-01-01

    Recent geological and geophysical studies in several continental rifts have begun to shed light on the details of the processes which govern the structural evolution of these important exploration targets. In Kenya and Tanzania, the classic East African rift has been the object of several investigations which reveal that its location follows the boundary (suture ) between the Tanzanian craton (Archean) and Mozambiquan belt (Proterozoic), The Baikal rift also follows a similar boundary, and the Mid-continent rift of North America appears to do the same. Rifts themselves often act as zones of weakness which are reactivated by younger tectonic regimes. The classic North American example of this effect is the Eocambrian Southern Oklahoma aulacogen which was deformed to create the Anadarko basin and Wichita uplift in the late Paleozoic. The Central basin platform has a similar history although the original rift formed at [approximately]1,100Ma. Integration of geophysical data with petrologic and geochemical data from several rift zones has also provided a new picture of the nature and extent of magmatic modification of the crust. An interesting contradiction is that Phanerozoic rifts, except the Afar region, show little evidence for major magmatic modification of the crust whereas, at least in North America, many Precambrian rifts are associated with very large mafic bodies in the crust. The Kenya rift displays evidence for modification of the lower crust in a two-phase magmatic history, but upper crustal magmatic features are limited to local intrusions associated with volcanoes. In this rift, complex basement structure plays a much more important role than previously realized, and the geophysical signatures of basement structure and magmatism are easy to confuse. If this is also the case in other rifts, additional rift basins remain to be discovered.

  15. Feature Detection, Characterization and Confirmation Methodology: Final Report

    SciTech Connect (OSTI)

    Karasaki, Kenzi; Apps, John; Doughty, Christine; Gwatney, Hope; Onishi, Celia Tiemi; Trautz, Robert; Tsang, Chin-Fu

    2007-03-01

    This is the final report of the NUMO-LBNL collaborative project: Feature Detection, Characterization and Confirmation Methodology under NUMO-DOE/LBNL collaboration agreement, the task description of which can be found in the Appendix. We examine site characterization projects from several sites in the world. The list includes Yucca Mountain in the USA, Tono and Horonobe in Japan, AECL in Canada, sites in Sweden, and Olkiluoto in Finland. We identify important geologic features and parameters common to most (or all) sites to provide useful information for future repository siting activity. At first glance, one could question whether there was any commonality among the sites, which are in different rock types at different locations. For example, the planned Yucca Mountain site is a dry repository in unsaturated tuff, whereas the Swedish sites are situated in saturated granite. However, the study concludes that indeed there are a number of important common features and parameters among all the sites--namely, (1) fault properties, (2) fracture-matrix interaction (3) groundwater flux, (4) boundary conditions, and (5) the permeability and porosity of the materials. We list the lessons learned from the Yucca Mountain Project and other site characterization programs. Most programs have by and large been quite successful. Nonetheless, there are definitely 'should-haves' and 'could-haves', or lessons to be learned, in all these programs. Although each site characterization program has some unique aspects, we believe that these crosscutting lessons can be very useful for future site investigations to be conducted in Japan. One of the most common lessons learned is that a repository program should allow for flexibility, in both schedule and approach. We examine field investigation technologies used to collect site characterization data in the field. An extensive list of existing field technologies is presented, with some discussion on usage and limitations. Many of the

  16. Features, Events, and Processes in UZ Flow and Transport

    SciTech Connect (OSTI)

    J.E. Houseworth

    2001-04-10

    Unsaturated zone (UZ) flow and radionuclide transport is a component of the natural barriers that affects potential repository performance. The total system performance assessment (TSPA) model, and underlying process models, of this natural barrier component capture some, but not all, of the associated features, events, and processes (FEPs) as identified in the FEPs Database (Freeze, et al. 2001 [154365]). This analysis and model report (AMR) discusses all FEPs identified as associated with UZ flow and radionuclide transport. The purpose of this analysis is to give a comprehensive summary of all UZ flow and radionuclide transport FEPs and their treatment in, or exclusion from, TSPA models. The scope of this analysis is to provide a summary of the FEPs associated with the UZ flow and radionuclide transport and to provide a reference roadmap to other documentation where detailed discussions of these FEPs, treated explicitly in TSPA models, are offered. Other FEPs may be screened out from treatment in TSPA by direct regulatory exclusion or through arguments concerning low probability and/or low consequence of the FEPs on potential repository performance. Arguments for exclusion of FEPs are presented in this analysis. Exclusion of specific FEPs from the UZ flow and transport models does not necessarily imply that the FEP is excluded from the TSPA. Similarly, in the treatment of included FEPs, only the way in which the FEPs are included in the UZ flow and transport models is discussed in this document. This report has been prepared in accordance with the technical work plan for the unsaturated zone subproduct element (CRWMS M&O 2000 [153447]). The purpose of this report is to document that all FEPs are either included in UZ flow and transport models for TSPA, or can be excluded from UZ flow and transport models for TSPA on the basis of low probability or low consequence. Arguments for exclusion are presented in this analysis. Exclusion of specific FEPs from UZ flow and

  17. Replication of surface features from a master model to an amorphous metallic article

    DOE Patents [OSTI]

    Johnson, William L.; Bakke, Eric; Peker, Atakan

    1999-01-01

    The surface features of an article are replicated by preparing a master model having a preselected surface feature thereon which is to be replicated, and replicating the preselected surface feature of the master model. The replication is accomplished by providing a piece of a bulk-solidifying amorphous metallic alloy, contacting the piece of the bulk-solidifying amorphous metallic alloy to the surface of the master model at an elevated replication temperature to transfer a negative copy of the preselected surface feature of the master model to the piece, and separating the piece having the negative copy of the preselected surface feature from the master model.

  18. SU-D-BRA-05: Toward Understanding the Robustness of Radiomics Features in CT

    SciTech Connect (OSTI)

    Mackin, D; Zhang, L; Yang, J; Jones, A; Court, L; Fave, X; Fried, D; Taylor, B; Rodriguez-Rivera, E; Dodge, C

    2015-06-15

    Purpose: To gauge the impact of inter-scanner variability on radiomics features in computed tomography (CT). Methods: We compared the radiomics features calculated for 17 scans of the specially designed Credence Cartridge Radiomics (CCR) phantom with those calculated for 20 scans of non–small cell lung cancer (NSCLC) tumors. The scans were acquired at four medical centers using General Electric, Philips, Siemens, and Toshiba CT scanners. Each center used its own routine thoracic imaging protocol. To produce a large dynamic range of radiomics feature values, the CCR phantom has 10 cartridges comprising different materials. The features studied were derived from the neighborhood gray-tone difference matrix or image intensity histogram. To quantify the significance of the inter-scanner variability, we introduced the metric “feature noise”, which compares the ratio of inter-scanner variability and inter-patient variability in decibels, positive values indicating substantial noise. We performed hierarchical clustering based to look for dependence of the features on the scan acquisition parameters. Results: For 5 of the 10 features studied, the inter-scanner variability was larger than the inter-patient variability. Of the 10 materials in the phantom, shredded rubber seemed to produce feature values most similar to those of the NSCLC tumors. The feature busyness had the greatest feature noise (14.3 dB), whereas texture strength had the least (−14.6 dB). Hierarchical clustering indicated that the features depended in part on the scanner manufacturer, image slice thickness, and pixel size. Conclusion: The variability in the values of radiomics features calculated for CT images of a radiomics phantom can be substantial relative to the variability in the values of these features calculated for CT images of NSCLC tumors. These inter-scanner differences and their effects should be carefully considered in future radiomics studies.

  19. Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Music | Jefferson Lab 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music NEWPORT NEWS, Va., Feb. 2, 2010 - Jefferson Lab's Feb. 9 Science Series event will feature members of the Tidewater Alliance of Chemistry Teachers (TACT) presenting 11 elaborate chemical demonstrations that have been choreographed and set to popular music. The program, titled A TACT-ful Chemical Musical, also

  20. Fractured reservoir discrete feature network technologies. Final report, March 7, 1996 to September 30, 1998

    SciTech Connect (OSTI)

    Dershowitz, William S.; Einstein, Herbert H.; LaPoint, Paul R.; Eiben, Thorsten; Wadleigh, Eugene; Ivanova, Violeta

    1998-12-01

    This report summarizes research conducted for the Fractured Reservoir Discrete Feature Network Technologies Project. The five areas studied are development of hierarchical fracture models; fractured reservoir compartmentalization, block size, and tributary volume analysis; development and demonstration of fractured reservoir discrete feature data analysis tools; development of tools for data integration and reservoir simulation through application of discrete feature network technologies for tertiary oil production; quantitative evaluation of the economic value of this analysis approach.

  1. Studies of the jet in BL Lacertae. I. Recollimation shock and moving emission features

    SciTech Connect (OSTI)

    Cohen, M. H.; Hovatta, T.; Meier, D. L.; Arshakian, T. G.; Homan, D. C.; Kovalev, Y. Y.; Pushkarev, A. B.; Savolainen, T.

    2014-06-01

    Parsec-scale VLBA images of BL Lac at 15 GHz show that the jet contains a permanent quasi-stationary emission feature 0.26 mas (0.34 pc projected) from the core, along with numerous moving features. In projection, the tracks of the moving features cluster around an axis at a position angle of 166.6 that connects the core with the standing feature. The moving features appear to emanate from the standing feature in a manner strikingly similar to the results of numerical two-dimensional relativistic magneto-hydrodynamic (RMHD) simulations in which moving shocks are generated at a recollimation shock (RCS). Because of this, and the close analogy to the jet feature HST-1 in M87, we identify the standing feature in BL Lac as an RCS. We assume that the magnetic field dominates the dynamics in the jet, and that the field is predominantly toroidal. From this we suggest that the moving features are compressions established by slow and fast mode magneto-acoustic MHD waves. We illustrate the situation with a simple model in which the slowest moving feature is a slow-mode wave, and the fastest feature is a fast-mode wave. In the model, the beam has Lorentz factor ?{sub beam}{sup gal}?3.5 in the frame of the host galaxy and the fast mode wave has Lorentz factor ?{sub Fwave}{sup beam}?1.6 in the frame of the beam. This gives a maximum apparent speed for the moving features, ?{sub app} = v{sub app}/c = 10. In this model the Lorentz factor of the pattern in the galaxy frame is approximately three times larger than that of the beam itself.

  2. Sandia Research to Be Featured on Upcoming Cover of Journal of...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Upcoming Cover of Journal of Physical Chemistry B - Sandia Energy Energy Search Icon ... Sandia Research to Be Featured on Upcoming Cover of Journal of Physical Chemistry B Home...

  3. NREL: A Year in Clean Energy Innovations: A Review of NREL's Feature Stories, 2010

    SciTech Connect (OSTI)

    Not Available

    2011-04-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2010.

  4. NREL: A Year in Clean Energy Innovations, A Review of NREL's 2012 Feature Stories (Book)

    SciTech Connect (OSTI)

    Not Available

    2013-03-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2012.

  5. NREL: A Year in Clean Energy Innovations, A Review of NREL's 2013 Feature Stories (Book)

    SciTech Connect (OSTI)

    Not Available

    2014-02-01

    The publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2013.

  6. NREL: A Year in Clean Energy Innovations: A Review of NREL's 2014 Feature Stories (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2015-03-01

    This publication is a compilation of various feature stories published on NREL's public website, nrel.gov, throughout Calendar Year 2014.

  7. Joint BioEnergy Institute Oxime-NIMS Work Featured on the Cover...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    BioEnergy Institute Oxime-NIMS Work Featured on the Cover of ACS Chemical Biology - Sandia ... Combustion Research Facility Joint BioEnergy Institute Research Engineering and ...

  8. ARPA-E's Seventh Annual Energy Innovation Summit to Feature America...

    Energy Savers [EERE]

    Jim Yong Kim Xerox Chief Technology Officer Dr. Sophie Vandebroek BASF Corporation Chairman and CEO Wayne T. Smith Featured Technology Showcase demonstrations: Air & ground ...

  9. Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture

    DOE Patents [OSTI]

    West, Phillip B.; Novascone, Stephen R.; Wright, Jerry P.

    2012-05-29

    Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

  10. Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture

    DOE Patents [OSTI]

    West, Phillip B.; Novascone, Stephen R.; Wright, Jerry P.

    2011-09-27

    Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

  11. Use of volumetric features for temporal comparison of mass lesions in full field digital mammograms

    SciTech Connect (OSTI)

    Bozek, Jelena Grgic, Mislav; Kallenberg, Michiel; Karssemeijer, Nico

    2014-02-15

    Purpose: Temporal comparison of lesions might improve classification between benign and malignant lesions in full-field digital mammograms (FFDM). The authors compare the use of volumetric features for lesion classification, which are computed from dense tissue thickness maps, to the use of mammographic lesion area. Use of dense tissue thickness maps for lesion characterization is advantageous, since it results in lesion features that are invariant to acquisition parameters. Methods: The dataset used in the analysis consisted of 60 temporal mammogram pairs comprising 120 mediolateral oblique or craniocaudal views with a total of 65 lesions, of which 41 were benign and 24 malignant. The authors analyzed the performance of four volumetric features, area, and four other commonly used features obtained from temporal mammogram pairs, current mammograms, and prior mammograms. The authors evaluated the individual performance of all features and of different feature sets. The authors used linear discriminant analysis with leave-one-out cross validation to classify different feature sets. Results: Volumetric features from temporal mammogram pairs achieved the best individual performance, as measured by the area under the receiver operating characteristic curve (A{sub z} value). Volume change (A{sub z} = 0.88) achieved higher A{sub z} value than projected lesion area change (A{sub z} = 0.78) in the temporal comparison of lesions. Best performance was achieved with a set that consisted of a set of features extracted from the current exam combined with four volumetric features representing changes with respect to the prior mammogram (A{sub z} = 0.90). This was significantly better (p = 0.005) than the performance obtained using features from the current exam only (A{sub z} = 0.77). Conclusions: Volumetric features from temporal mammogram pairs combined with features from the single exam significantly improve discrimination of benign and malignant lesions in FFDM mammograms

  12. Methods for the Precise Locating and Forming of Arrays of Curved Features into a Workpiece

    DOE Patents [OSTI]

    Gill, David Dennis; Keeler, Gordon A.; Serkland, Darwin K.; Mukherjee, Sayan D.

    2008-10-14

    Methods for manufacturing high precision arrays of curved features (e.g. lenses) in the surface of a workpiece are described utilizing orthogonal sets of inter-fitting locating grooves to mate a workpiece to a workpiece holder mounted to the spindle face of a rotating machine tool. The matching inter-fitting groove sets in the workpiece and the chuck allow precisely and non-kinematically indexing the workpiece to locations defined in two orthogonal directions perpendicular to the turning axis of the machine tool. At each location on the workpiece a curved feature can then be on-center machined to create arrays of curved features on the workpiece. The averaging effect of the corresponding sets of inter-fitting grooves provide for precise repeatability in determining, the relative locations of the centers of each of the curved features in an array of curved features.

  13. FAINT TIDAL FEATURES IN GALAXIES WITHIN THE CANADA-FRANCE-HAWAII TELESCOPE LEGACY SURVEY WIDE FIELDS

    SciTech Connect (OSTI)

    Atkinson, Adam M.; Abraham, Roberto G.; Ferguson, Annette M. N.

    2013-03-01

    We present an analysis of the detectability of faint tidal features in galaxies from the wide-field component of the Canada-France-Hawaii Telescope Legacy Survey. Our sample consists of 1781 luminous (M{sub r{sup '}}<-19.3 mag) galaxies in the magnitude range 15.5 mag < r' < 17 mag and in the redshift range 0.04 < z < 0.2. Although we have classified tidal features according to their morphology (e.g., streams, shells, and tails), we do not attempt to interpret them in terms of their physical origin (e.g., major versus minor merger debris). Instead, we provide a catalog that is intended to provide raw material for future investigations which will probe the nature of low surface brightness substructure around galaxies. We find that around 12% of the galaxies in our sample show clear tidal features at the highest confidence level. This fraction rises to about 18% if we include systems with convincing, albeit weaker tidal features, and to 26% if we include systems with more marginal features that may or may not be tidal in origin. These proportions are a strong function of rest-frame color and of stellar mass. Linear features, shells, and fans are much more likely to occur in massive galaxies with stellar masses >10{sup 10.5} M {sub Sun }, and red galaxies are twice as likely to show tidal features than are blue galaxies.

  14. Significance-weighted feature extraction from hyper-dimensional data and its applications

    SciTech Connect (OSTI)

    Fujimura, S.; Kiyasu, S.

    1996-11-01

    Extracting significant features is essential for processing and transmission of vast volume of hyper-dimensional data. Conventional ways of extracting features are not always satisfactory for this kind of data in terms of optimality and computation time. Here we present a successive feature extraction method designed for significance-weighted supervised classification. After all the data are orthogonalized and reduced by principal component analysis, a set of appropriate features for prescribed purpose is extracted as linear combinations of the reduced components. We applied this method to 411 dimensional hyperspectral data obtained by a ground-based imaging spectrometer. The data were obtained from tree leaves of five categories, soil, stone and concrete. Features were successively extracted, and they were found to yield more than several percents higher accuracy for the classification of prescribed classes than a conventional method. We applied the results of feature extraction for evaluating the performance of current sensors and for designing the spectral bands of new sensors. Bands of new sensors were designed by allocating them to the highly weighted wavelength in extracted features. The designed bands were revealed to be more appropriate for the specific purpose than the current sensors. 8 refs., 11 figs., 3 tabs.

  15. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 2010 NUG Call Tuesday Sept 2, 2010 10am PST September 2, 2010

  16. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    January 2011 NERSC seeks Computational Systems Group Lead January 6, 2011 by Katie Antypas Note: This position is now closed. Read the full post NISE Requests Due Feb. 24 January 1, 2011 by Francesca Verdier The first round of NERSC Initiative for Scientific Exploration (NISE) requests are due February 24. Ten percent of NERSC time is allocated through this program. See NERSC Initiative for Scientific Exploration

  17. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 2011 NERSC training events: Data Transfer and Archiving; Chemistry and Material Sciences Applications February 21, 2011 by Richard Gerber NERSC will present two training events in March: Data Transfer and Archiving March 8, 2011 10:00-12:30 Pacific Time Using Chemistry and Material Sciences Applications at NERSC March 22, 2011 10:00-12:00 Pacific Time Each event will be held concurrently at NERSC's Oakland Scientific Facility and over the web

  18. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2011 Training April 5 - Material Science and Chemistry Applications March 9, 2011 by Francesca Verdier Training on "Using Chemistry and Material Sciences Applications" will be held April 5, presented simultaneously on the web and at NERSC. See Chemistry and Material Sciences Applications. Read the full post Student Summer Internships at NERSC March 9, 2011 by Francesca Verdier NERSC has internship positions in cloud computing, data focused science, and Flash I/O performnace. See

  19. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2011 NERSC Online Training May 3: Navigating NERSC File Systems April 26, 2011 by Richard Gerber A NERSC training event, "Navigating NERSC File Systems," will be presented Tuesday, May 3, 2011, from 10:00 -11:00 PDT. This event was postponed from April 26. The event will be presented simultaneously at the NERSC Oakland Scientific Facility and as a webcast. Read the full post NUG teleconference April 14, 2011 April 13, 2011 by Francesca Verdier On the agenda: Hopper time

  20. Featured Announcements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2011 New 1 Terabyte Memory Node June 17, 2011 by Francesca Verdier A new "extra large" memory node that has four 8-core Nehalem EX processors (32 cores total) and 1TB memory has been deployed in the Carver/Magellan complex. See Memory Considerations on Carver. Read the full post SC11 Education Program Applications due July 31 June 9, 2011 by Francesca Verdier Applications for the Education Program are now being accepted. Submission website: https://submissions.supercomputing.org

  1. Featured Announcements

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    July 2011 Workshop on Cray XE6 User Experiences September 27-28 July 11, 2011 by Francesca Verdier Sandia National Laboratory and Cray Inc are hosting a Workshop on Cray XE6 User Experiences in Albuquerque, New Mexico, on September 27 -28, 2011. The workshop will focus on:

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    August 2011 Hopper Scaling Incentive Program August 30, 2011 by Francesca Verdier For projects that haven't yet scaled their codes to 683 or more nodes (which is the level at which a job is considered "big" on hopper) NERSC is offering scaling incentives, mostly focused on the use of OpenMP. For some codes, adding OpenMP directives will allow you to scale up and run bigger science problems. For users accepted in the Scaling Incentive Program: Read the full post Intel compiler now

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    October 2011 Bioinformatics Computing Consultant Position Available October 31, 2011 by Katie Antypas NERSC and the Joint Genome Institute (JGI) are searching for two individuals who can help biologists exploit advanced computing platforms. JGI provides production sequencing and genomics for the Department of Energy. These activities are critical to the DOE missions in areas related to clean energy generation and environmental characterization and cleanup. JGI has recently partnered with NERSC,

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    January 2012 NERSC User Group Annual Meeting February 1-3, 2012 January 5, 2012 by Francesca Verdier Registration is open for the NERSC Users' Group Meeting and HPC training on Feb. 1-3, 2012. The meeting will be held at NERSC's Oakland Scientific Facility in Oakland, CA. All three days will be available as a WebEx web meeting for remote participation. All NERSC users are invited to attend all three days

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    March 2012 Franklin to be Retired April 30, 2012 March 6, 2012 by Francesca Verdier Franklin and its external login node Freedom will be retired on April 30, 2012. Batch processing will end on April 26.

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    April 2012 Eight Projects Selected for NERSC's Data Intensive Computing Pilot Program April 30, 2012 by Francesca Verdier Eight projects have been selected to participate in NERSC's Data Intensive Computing Pilot Program. They will help us investigate new data methods and understand their usefulness to scientists using NERSC resources. The selected projects are:

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    May 2012 NOVA Portal: Submit VASP Jobs to Carver via the Web May 11, 2012 by Francesca Verdier NOVA is an experimental web application that enables users to submit VASP jobs to NERSC resources. You must be a licensed VASP user in order to submit jobs through NOVA. This initial version of NOVA runs only on Carver

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    June 2012 Cray to Install Cascade System at NERSC June 27, 2012 by Richard Gerber Cray will install a next-generation supercomputer code-named "Cascade" and a next-generation Cray Sonexion storage system at NERSC. Read the press release. Read the full post Visualization Contest Applications due August 3 June 22, 2012 by Francesca Verdier In support of the IEEE Symposium on Large-Scale Data Analysis and Visualization (LDAV) 2012's visualization contest, LDAV organizers are offering

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    August 2012 2013 Allocation Request Submissions Due September 28 August 1, 2012 by Francesca Verdier The deadline for submissions for 2013 NERSC allocation requests is September 28 at 11:59 p.m. PDT. All current 2012 NERSC projects (including startup, education, ALCC, NISE and Data Intensive Pilot projects) must be renewed for 2013 in order to continue using NERSC

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    October 2012 Applications for Postdoctoral Fellowship in Computational Science at Berkeley Lab due November 26 October 15, 2012 by Francesca Verdier Researchers in computer science, applied mathematics or any computational science discipline who have received their Ph.D. within the last three years are encouraged to apply for the Luis W. Alvarez Postdoctoral Fellowship in Computational Science at Lawrence Berkeley National Laboratory. Read the full post New NERSC Director Sudip Dosanjh October

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    November 2012 Phase-1 of NERSC's Cray Edison System Has Arrived November 28, 2012 by Francesca Verdier Phase-1 of the new Edison system, a Cray XC30 (Cascade), arrived at NERSC on November 27. The system will be available to users in 2013; early user access is targeted for February. See Edison Overview

  12. Featured Announcements

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    January 2013 ASCR Leadership Computing Challenge (ALCC) proposals due February 1, 2013 January 2, 2013 by Francesca Verdier DOE's ASCR Leadership Computing Challenge (ALCC) program is intended for special situations of interest to the Department's energy mission, with an emphasis on high-risk, high-payoff simulations: Read the full post Call for presentations and registration is open for NUG 2013. January 2, 2013 by Richard Gerber Registration is open for NUG 2013, the annual meeting of the

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    February 2013 NERSC User Day February 13 - Trends, Discovery, and Innovation in HPC February 10, 2013 by Francesca Verdier All members of the Berkeley Lab community, as well as those who have registered for the NERSC Users Group meeting, are welcome to join us for the NERSC User Day this February 13, 2013, in the Building 50 auditorium at Berkeley Lab

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    March 2013 Track NERSC Outages in Google Calendar March 22, 2013 by Jack Deslippe Outages are now available in Google calendar form. You can subscribe to this calendar by following the link, http://goo.gl/A4n3k, and then clicking the add button on the bottom right. If you find any issues with the calendar content, please contact NERSC consultants by email at consult(at)nersc.gov. Read the full post HPSS Outage Tue Mar 19 - Fri Mar 22 March 12, 2013 by Francesca Verdier The NERSC HPSS

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    April 2013 2014 INCITE Call for Proposals - Due June 28 April 30, 2013 by Francesca Verdier The 2014 INCITE Call for Proposals is now open. Open to researchers from academia, government labs, and industry, the INCITE Program is the major means by which the scientific community gains access to the Leadership Computing Facilities' resources. INCITE is currently soliciting proposals for research on the 27-petaflops Cray XK7 "Titan" and the 10-petaflops IBM Blue Gene/Q "Mira"

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    May 2013 Users May Now Clear Their Own Login Failures May 16, 2013 by Francesca Verdier Users may now clear their own login failures simply by logging in to the NIM website (https://nim.nersc.gov). No further steps are necessary; that is, the simple act of logging in to NIM will clear your login failures on all NERSC compute systems. NIM will then provide a display of the number of login failures that were cleared on each compute system that was affected at the top of the NIM landing page

  17. Featured Announcements

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    June 2013 Introduction to HPC using GPUs July 11, 2013 June 18, 2013 by Francesca Verdier Registration is open for a one-day class "Introduction to High Performance Computing using GPUs" on July 11, 2013. The class is being held on the University of California Berkeley campus in Sutardja Dai Hall room 250 and will be broadcast to remote viewers. For more information and to register (both local and remote attendees), please visit

  18. Featured Announcements

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    July 2013 New Account Request form for new NERSC accounts July 15, 2013 NERSC has implemented a new, user initiated account request form for new NERSC user accounts to all NERSC projects. This form is intended to reduce data entry errors and also reduce processing time by allowing a new user to enter their information for an account into a form that goes directly into the NIM database. This methodology has been in use by the PDSF and JGI communities and we are now extending it to the MPP

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    August 2013 All Users Now Enabled on Edison Phase 2 August 30, 2013 by Francesca Verdier All user accounts have been enabled on the second phase of Edison, a Cray XC30 with 5,200 compute nodes and roughly twice the sustained system performance of Hopper. The user environment on Edison phase 2 is the same as that on Edison phase 1, Of particular note is that the default programming environment uses the Intel compilers and the PGI compilers are not available. While most of the applications that

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    September 2013 Video Tutorial for Submitting a 2014 ERCAP Request available September 17, 2013 Rushing to meet the September 22nd deadline for submitting your 2014 ERCAP renewal request? Would you spend sixteen and a half minutes to possibly save hours of frustration? Then check out the new video tutorial on How to Submit a 2014 ERCAP Request and get the information you need to speed through your ERCAP submission and save yourself time and headaches. Read the full post New Global Scratch File

  1. Featured Announcements

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    December 2013 2014 DOE ALCC Proposals Due February 3 December 23, 2013 by Francesca Verdier DOE's 2014 call for its ASCR Leadership Computing Challenge (ALCC) competition is posted: http://science.energy.gov/ascr/facilities/alcc/. There are new guidelines this year: http://science.energy.gov/ascr/facilities/alcc/alcc-application-details/. Proposals for 2014 ALCC are due 11:59 PM EST February 3rd, 2014. Email your completed proposal to ALCC@science.doe.gov. PDF format is preferred but not

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    August 2014 2015 NERSC allocation requests due September 22 August 13, 2014 by Francesca Verdier The NERSC allocation submission system is now open for 2015 requests. All current NERSC projects (including startup, education, Director Reserve, and ALCC projects) must be renewed for 2015 if you wish to continue using NERSC. New project requests may be submitted as well (for either the remainder of 2014 or to start in 2015). The deadline for 2015 requests is 23:59 Pacific Time September 22, 2014

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    October 2014 Major NERSC Maintenance Tuesday November 11 October 31, 2014 by Francesca Verdier There will be a major NERSC maintenance on Tuesday, November 11, from 08:00 until 18:00 PST. Several systems and services will be unavailable during this time

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    November 2014 Soliciting Candidates for NERSC User Group Executive Committee November 12, 2014 by Francesca Verdier The NERSC User Group is soliciting candidates for the upcoming election for NUGEX, the executive committee of the NERSC Users' Group (NUG). NUGEX is the voice of the user community to NERSC and DOE and is consulted on many NERSC policy issues, e.g., batch configurations, disk quotas, services and training offerings. There are 8 openings to represent Fusion Energy Sciences, High

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    December 2014 2014 NERSC User Survey December 17, 2014 by Francesca Verdier Please take a few minutes to fill out NERSC's annual user survey. Your feedback is important because it allows us to judge the quality of our services, give DOE information on how we are doing, and point us to areas in which we can improve. The survey is on the web at the URL: https://www.nersc.gov/news-publications/publications-reports/user-surveys/2014/ and covers the allocation year 2014. Read the full post NERSC 2015

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    January 2015 NERSC Exascale Science Postdoctoral Fellowships January 26, 2015 Applications are being accepted for up to eight postdoctoral fellowship positions at NERSC. The positions are part of a larger effort to enable new, pathbreaking science with NERSC's next generation manycore Cori supercomputer. Fellows will be working in multidisciplinary teams composed of computer, computational, and domain scientists that will transition codes to the Cori system and produce mission-relevant science

  7. Featured Announcements

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    March 2015 Intel Led OpenMP Training Session at NERSC This Wednesday March 25 March 24, 2015 by Katie Antypas This Wednesday, March 25th, from 10AM-2PM pacific at NERSC's Oakland Facility (415 20th St, Oakland, CA 94612), NERSC will be hosting an Intel led OpenMP threading training session. This is a great chance to learn the methodology for starting with a serial or MPI only code, identifying regions of interest for OpenMP and effectively creating a hybrid MPI-OpenMP application

  8. Featured Announcements

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    July 2015 Intel Xeon Phi Webinar Series July 2, 2015 by Richard Gerber Intel, through a third-party trainer, is sponsoring a series of webinars focused on the Xeon Phi. You can register at https://attendee.gotowebinar.com/register/1855310790447082498

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    September 2015 AY 2016 ERCAP Renewals Due Sept 21st September 18, 2015 Rememeber to submit your AY 2016 ERCAP renewal requests by 21:59 on Monday Sept. 21st. Read the full post ERCAP Deadline is Sept 21, 2015 September 18, 2015 by Clayton Bagwell Don't forget to submit your 2016 ERCAP renewal request. Read the full post Out of time? Use scavenger queue on Hopper September 18, 2015 by Katie Antypas NERSC is now allowing projects and users who have fewer than 100,000 MPP hours to run in the

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    November 2015 Edison scratch files will be deleted on 11/30/2015 when Edison moves November 15, 2015 by Zhengji Zhao Edison is scheduled to be powered off at 7:00am PST on November 30, 2015 to move to our new CRT building. We expect Edison to be offline for up to six weeks. During the move Edison's scratch file systems will be reformatted and all data will be removed. ALL files on the /scratch1, /scratch2, and /scratch3 file systems WILL BE DELETED! Please save your important files on HPSS, your

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    December 2015 Hopper has retired. NERSC is moving! December 16, 2015 by Katie Antypas NERSC's Hopper system has retired and NERSC (people and remaining systems) are moving to our new facility on the hill. We thank all our users for your patience during our move! Regards, Katie Antypas Department Head for Scientific Computing and Data Services

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    January 2016 Edison's move is complete January 8, 2016 by Richard Gerber We're pleased to announce that Edison is once again available to all NERSC users. The move from the NERSC Oakland Scientific Facility to the main Berkeley Lab campus was completed one week earlier than expected! Usage will not be charged through the end of the allocation year. Edison is now using the SLURM batch scheduler and job launcher (qsub will not work!). Please see the following web page for more information:

  13. Featured Announcements

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    April 2016 New Webinar Series on Best Practices for HPC Software Developers April 25, 2016 by Rebecca Hartman-Baker A new webinar series aimed at developers of software on HPC systems begins on May 4, 2016. These webinars, which are a collaboration between the IDEAS scientific software productivity project, NERSC, ALCF, and OLCF, will present best practices that will help users of HPC systems carry out their software development more productively. The first webinar, entitled "What All Codes

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    May 2016 Cori Phase II Preparations May 9, 2016 by Rebecca Hartman-Baker We expect the first cabinets of Cori Phase II to arrive in CRT/Wang Hall on the LBL campus in July. NERSC personnel will immediately get to work on bringing the machine into production. Before the machine can be released to the NERSC user community, a number of tasks must be completed, some of which will have a direct impact on NERSC users. We've created the Cori Phase II Schedule page to keep users updated on the progress

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    June 2016 Important Update on Cori Status June 30, 2016 by Rebecca Hartman-Baker We are grateful for your patience as we upgrade Cori to the latest operating system, a necessary step in enabling support for the upcoming Knights Landing Phase 2 of Cori. At 2:00 pm Pacific time, we will release the machine back to users. Before you log in and begin working on Cori again, here are a few important things you should know. Read the full post Women in HPC at SC16: Call for Posters and Participation

  16. Featured Announcements

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    August 2016 ERCAP Renewals for AY17 Due September 19, 2016 23:59 PDT August 25, 2016 by Rebecca Hartman-Baker ERCAP Renewals for AY17 Due September 19, 2016, 23:59 PDT The deadline for submitting an ERCAP proposal for an allocation for next year is September 19, 2016 at 11:59 PM Pacific Time. Read the full post Xeon Phi Users Group 2016 Meeting August 3, 2016 by Richard Gerber Intel Xeon Phi Users Group 2016 Meeting Call for Presentations Have you been working to port or optimize your code for

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    Founded in 1974 at Lawrence Livermore National Laboratory (LLNL) as the Controlled Thermonuclear Research Computer Center, NERSC has evolved from its early days supporting...

  18. Featured Announcements

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    NERSC Allocation Year 2012 Ends Monday, January 7 December 19, 2012 by David Turner ... NERSC 2013 awards December 14, 2012 by David Turner The NERSC 2013 awards have been posted

  19. Featured Announcements

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    register6325131222429932289)

    Mon, August 17 - "Hello world from Intel Xeon Phi coprocessors". Overview of architecture, preview of course...

  20. Featured Articles

    Office of Science (SC) Website

    Award. 8CC841F4-EA48-4038-BA00-09C81040C015http:1.usa.gov1kagbcv Flowing Toward Red Blood Cell Breakthroughs

  1. features | JCESR

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Team Led by Argonne National Lab Selected as DOE's Batteries and Energy Storage Hub On ... to announce that a multi-partner team led by Argonne National Laboratory has been ...

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    August 2015 Parallel Programming and Optimization for Intel Architecture August 14, 2015 by Richard Gerber Intel is sponsoring a series of webinars entitled "Parallel Programming...

  3. ALSNews Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... based on entering the DOI. To enter publications or to search the ALS publications database, go ... In terms of user access, there are opportunities and challenges to the ...

  4. Featured Announcements

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    and Challenges. From the 2014 NERSC User's Group Meeting March 20, 2014 by Richard Gerber Modeling the Changing Earth System: Prospects and Challenges, William Collins,...

  5. Featured Announcements

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    aka GSCRATCH) will be retired on October 14 at 12:00 PDT October 9, 2015 by Richard Gerber This is a reminder that the Global Scratch (globalscratch2 aka GSCRATCH) file...

  6. Featured Announcements

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    and Status Mon, Nov 28 westmere queue drain - 08:00 - DONE remove - 10:20 - DONE serial queue add westmere nodes - 10:40 - DONE Tue, Nov 29 magxlmem queue drain - 08:00 -...

  7. Featured Announcements

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    September 2011 Serial and Westmere Queues on Carver September 20, 2011 by Francesca Verdier NERSC has replaced 80 8-core Intel Nehalem nodes on Carver with 80 12-core Intel...

  8. Featured Announcements

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    on utilization andor free memory Through the use of modern web technology such as HTML5, advanced javascript libraries and WebGL, NERSC has created rich web applications for...

  9. Featured Announcements

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    October 2013 OpenCL now Available on Dirac GPU Cluster October 30, 2013 by Francesca Verdier As requested by many Dirac users, NERSC is migrating Dirac to a newer Linux version to...

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    Help Staff Blogs Request Repository Mailing List Need Help? Out-of-hours Status and Password help Call operations: 1-800-66-NERSC, option 1 or 510-486-6821 Account Support ...

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    May 2011 X-Windows Acceleration via NX May 12, 2011 by Francesca Verdier NX is a computer program that handles remote X-Windows connections. It can greatly improve the speed of...

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    Exploration (NISE) 2012 awards have been made February 16, 2012 by Francesca Verdier We received 60 NISE requests this year and have awarded 107.5 million hours to 22 projects. ...

  13. Featured Announcements

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    the NERSC Initiative for Scientific Exploration (NISE) program. This year we expect to allocate about 100 million hours to a few large projects. Read the full post NERSC 2012 ...

  14. Featured Announcements

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    November 2013 2014 Call for NERSC Initiative for Scientific Exploration (NISE) Program Due ... is now open for its second round of allocations to projects in data intensive science. ...

  15. Notre Dame EFRC featured during nationally televised football half-time

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    show | U.S. DOE Office of Science (SC) Notre Dame EFRC featured during nationally televised football half-time show Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events EFRC News EFRC Events DOE Announcements Publications History Contact BES Home 11.21.09 Notre Dame EFRC featured during nationally televised football half-time show Print Text Size: A A A Subscribe FeedbackShare Page Nov 21, 2009 :: NBC aired a video feature External link of

  16. New Low-Energy Building a Landscape Leader, Too - News Feature...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    "We were able to mix really nice landscaping features with the walls and used a lot less energy than if we'd used a ... in this area of the country," Rukavina said. "It will ...

  17. AN ENIGMATIC POINT-LIKE FEATURE WITHIN THE HD 169142 TRANSITIONAL DISK ,

    SciTech Connect (OSTI)

    Biller, Beth A.; Males, Jared; Morzinski, Katie; Close, Laird M.; Follette, Katherine B.; Hinz, Philip M.; Rodigas, Timothy; Weinberger, Alycia; Juhász, Attila; Lacour, Sylvestre; Henning, Thomas; Pott, Jörg-Uwe; Köhler, Rainer; Bonnefoy, Mickaël

    2014-09-01

    We report the detection of a faint point-like feature possibly related to ongoing planet-formation in the disk of the transition disk star HD 169142. The point-like feature has a Δmag(L) ∼ 6.4, at a separation of ∼0.''11 and position angle ∼0°. Given its lack of an H or K{sub S} counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength follow up is necessary for confirmation and characterization of this feature.

  18. Web Feature Nuclear Stewardship: Lessons from a Not-So-Remote...

    Office of Legacy Management (LM)

    Geotimes - March 2002 - Amchitka Island Yage 1 ot 6 Web Feature Nuclear Stewardship: Lessons from a Not-So-Remote Island John Eichelberger, Jeff Freymueller. Graham Hill and Matt ...

  19. ARPA-E's Seventh Annual Energy Innovation Summit to Feature America's

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Cutting-Edge Technologies and Convene Top Energy Innovators | Department of Energy E's Seventh Annual Energy Innovation Summit to Feature America's Cutting-Edge Technologies and Convene Top Energy Innovators ARPA-E's Seventh Annual Energy Innovation Summit to Feature America's Cutting-Edge Technologies and Convene Top Energy Innovators February 1, 2016 - 2:25pm Addthis News Media Contact 202-586-4940 DOENews@hq.doe.gov WASHINGTON - The Department of Energy's Advanced Research Projects

  20. Computer-aided breast MR image feature analysis for prediction of tumor response to chemotherapy

    SciTech Connect (OSTI)

    Aghaei, Faranak; Tan, Maxine; Liu, Hong; Zheng, Bin; Hollingsworth, Alan B.; Qian, Wei

    2015-11-15

    Purpose: To identify a new clinical marker based on quantitative kinetic image features analysis and assess its feasibility to predict tumor response to neoadjuvant chemotherapy. Methods: The authors assembled a dataset involving breast MR images acquired from 68 cancer patients before undergoing neoadjuvant chemotherapy. Among them, 25 patients had complete response (CR) and 43 had partial and nonresponse (NR) to chemotherapy based on the response evaluation criteria in solid tumors. The authors developed a computer-aided detection scheme to segment breast areas and tumors depicted on the breast MR images and computed a total of 39 kinetic image features from both tumor and background parenchymal enhancement regions. The authors then applied and tested two approaches to classify between CR and NR cases. The first one analyzed each individual feature and applied a simple feature fusion method that combines classification results from multiple features. The second approach tested an attribute selected classifier that integrates an artificial neural network (ANN) with a wrapper subset evaluator, which was optimized using a leave-one-case-out validation method. Results: In the pool of 39 features, 10 yielded relatively higher classification performance with the areas under receiver operating characteristic curves (AUCs) ranging from 0.61 to 0.78 to classify between CR and NR cases. Using a feature fusion method, the maximum AUC = 0.85 ± 0.05. Using the ANN-based classifier, AUC value significantly increased to 0.96 ± 0.03 (p < 0.01). Conclusions: This study demonstrated that quantitative analysis of kinetic image features computed from breast MR images acquired prechemotherapy has potential to generate a useful clinical marker in predicting tumor response to chemotherapy.

  1. Leveraging the General Services Administration's SmartPay2 Program and its Single Use Account Feature

    Broader source: Energy.gov [DOE]

    This Flash is issued to clarify the Single Use Account feature discussed in the Memorandum, Leveraging the General Services Administration's SmartPay2 Program and its Single Use Account Feature, dated February 6, 2013, should be leveraged by all current and future GSA SmartPay2 Program contractors, where it makes sense. Single Use Accounts are not designed for Federal procurement offices to use for payments, and therefore, do not apply to Federal employees.

  2. FALDO: A semantic standard for describing the location of nucleotide and protein feature annotation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bolleman, Jerven T.; Mungall, Christopher J.; Strozzi, Francesco; Baran, Joachim; Dumontier, Michel; Bonnal, Raoul J. P.; Buels, Robert; Hoehndorf, Robert; Fujisawa, Takatomo; Katayama, Toshiaki; et al

    2016-06-13

    In this study, nucleotide and protein sequence feature annotations are essential to understand biology on the genomic, transcriptomic, and proteomic level. Using Semantic Web technologies to query biological annotations, there was no standard that described this potentially complex location information as subject-predicate-object triples. Here, we have developed an ontology, the Feature Annotation Location Description Ontology (FALDO), to describe the positions of annotated features on linear and circular sequences. FALDO can be used to describe nucleotide features in sequence records, protein annotations, and glycan binding sites, among other features in coordinate systems of the aforementioned “omics” areas. Using the same datamore » format to represent sequence positions that are independent of file formats allows us to integrate sequence data from multiple sources and data types. The genome browser JBrowse is used to demonstrate accessing multiple SPARQL endpoints to display genomic feature annotations, as well as protein annotations from UniProt mapped to genomic locations. In conclusion, our ontology allows users to uniformly describe – and potentially merge – sequence annotations from multiple sources. Data sources using FALDO can prospectively be retrieved using federalised SPARQL queries against public SPARQL endpoints and/or local private triple stores.« less

  3. FALDO: a semantic standard for describing the location of nucleotide and protein feature annotation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bolleman, Jerven T.; Mungall, Christopher J.; Strozzi, Francesco; Baran, Joachim; Dumontier, Michel; Bonnal, Raoul J. P.; Buels, Robert; Hoehndorf, Robert; Fujisawa, Takatomo; Katayama, Toshiaki; et al

    2016-06-13

    Nucleotide and protein sequence feature annotations are essential to understand biology on the genomic, transcriptomic, and proteomic level. Using Semantic Web technologies to query biological annotations, there was no standard that described this potentially complex location information as subject-predicate-object triples. In this paper, we have developed an ontology, the Feature Annotation Location Description Ontology (FALDO), to describe the positions of annotated features on linear and circular sequences. FALDO can be used to describe nucleotide features in sequence records, protein annotations, and glycan binding sites, among other features in coordinate systems of the aforementioned “omics” areas. Using the same data formatmore » to represent sequence positions that are independent of file formats allows us to integrate sequence data from multiple sources and data types. The genome browser JBrowse is used to demonstrate accessing multiple SPARQL endpoints to display genomic feature annotations, as well as protein annotations from UniProt mapped to genomic locations. Our ontology allows users to uniformly describe – and potentially merge – sequence annotations from multiple sources. Finally, data sources using FALDO can prospectively be retrieved using federalised SPARQL queries against public SPARQL endpoints and/or local private triple stores.« less

  4. Automated retrieval of cloud and aerosol properties from the ARM Raman lidar, part 1: feature detection

    SciTech Connect (OSTI)

    Thorsen, Tyler J.; Fu, Qiang; Newsom, Rob K.; Turner, David D.; Comstock, Jennifer M.

    2015-11-01

    A Feature detection and EXtinction retrieval (FEX) algorithm for the Atmospheric Radiation Measurement (ARM) program’s Raman lidar (RL) has been developed. Presented here is part 1 of the FEX algorithm: the detection of features including both clouds and aerosols. The approach of FEX is to use multiple quantities— scattering ratios derived using elastic and nitro-gen channel signals from two fields of view, the scattering ratio derived using only the elastic channel, and the total volume depolarization ratio— to identify features using range-dependent detection thresholds. FEX is designed to be context-sensitive with thresholds determined for each profile by calculating the expected clear-sky signal and noise. The use of multiple quantities pro-vides complementary depictions of cloud and aerosol locations and allows for consistency checks to improve the accuracy of the feature mask. The depolarization ratio is shown to be particularly effective at detecting optically-thin features containing non-spherical particles such as cirrus clouds. Improve-ments over the existing ARM RL cloud mask are shown. The performance of FEX is validated against a collocated micropulse lidar and observations from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite over the ARM Darwin, Australia site. While we focus on a specific lidar system, the FEX framework presented here is suitable for other Raman or high spectral resolution lidars.

  5. AP1000{sup R} severe accident features and post-Fukushima considerations

    SciTech Connect (OSTI)

    Scobel, J. H.; Schulz, T. L.; Williams, M. G.

    2012-07-01

    The AP1000{sup R} passive nuclear power plant is uniquely equipped to withstand an extended station blackout scenario such as the events following the earthquake and tsunami at Fukushima without compromising core and containment integrity. The AP1000 plant shuts down the reactor, cools the core, containment and spent fuel pool for more than 3 days using passive systems that do not require AC or DC power or operator actions. Following this passive coping period, minimal operator actions are needed to extend the operation of the passive features to 7 days using installed equipment. To provide defense-in-depth for design extension conditions, the AP1000 plant has engineered features that mitigate the effects of core damage. Engineered features retain damaged core debris within the reactor vessel as a key feature. Other aspects of the design protect containment integrity during severe accidents, including unique features of the AP1000 design relative to passive containment cooling with water and air, and hydrogen management. (authors)

  6. Profile evolution of Cr masked features undergoing HBr-inductivelycoupled plasma etching for use in 25 nm silicon nanoimprinttemplates

    SciTech Connect (OSTI)

    Olynick, Deirdre L.; Liddle, J. Alexander; Rangelow, Ivo W.

    2005-09-16

    In nanoimprint template fabrication, the profile of thetemplate features plays a significant role in the profile,release-60084

  7. Polarization dependent asymmetric magneto-resistance features in nanocrystalline diamond films

    SciTech Connect (OSTI)

    Bhattacharyya, Somnath

    2014-08-18

    Polar angle-dependence of magneto-resistance (AMR) in heavily nitrogen-incorporated ultra-nanocrystalline diamond (UNCD) films is recorded by applying high magnetic fields, which shows strong anisotropic features at low temperatures. The temperature-dependence of MR and AMR can reveal transport in the weak-localization regime, which is explained by using a superlattice model for arbitrary values of disorder and angles. While a propagative Fermi surface model explains the negative MR features for low degree of disorder the azimuthal angle-dependent MR shows field dependent anisotropy due to the aligned conducting channels on the layers normal to film growth direction. The analysis of MR and AMR can extract the temperature dependence of dephasing time with respect to the elastic scattering time which not only establishes quasi-two dimensional features in this system but also suggests a potential application in monitoring the performance of UNCD based quantum devices.

  8. Image feature based GPS trace filtering for road network generation and road segmentation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yuan, Jiangye; Cheriyadat, Anil M.

    2015-10-19

    We propose a new method to infer road networks from GPS trace data and accurately segment road regions in high-resolution aerial images. Unlike previous efforts that rely on GPS traces alone, we exploit image features to infer road networks from noisy trace data. The inferred road network is used to guide road segmentation. We show that the number of image segments spanned by the traces and the trace orientation validated with image features are important attributes for identifying GPS traces on road regions. Based on filtered traces , we construct road networks and integrate them with image features to segmentmore » road regions. Lastly, our experiments show that the proposed method produces more accurate road networks than the leading method that uses GPS traces alone, and also achieves high accuracy in segmenting road regions even with very noisy GPS data.« less

  9. ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Smith and Lee Scott | Department of Energy 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott September 9, 2011 - 9:25am Addthis New York, NY - The U.S. Department of Energy's Advanced Research Projects Agency - Energy (ARPA-E) Director, Arun Majumdar, announced yesterday that the Agency will hold its third annual ARPA-E Energy Innovation Summit from February 27 - 29, 2012

  10. Special Feature: National Security & Public Safety at the National Labs |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Special Feature: National Security & Public Safety at the National Labs Special Feature: National Security & Public Safety at the National Labs December 4, 2013 - 4:10pm Addthis In the photo above, a robot investigates a bomb threat at an arcade during the 2013 Robot Rodeo at Sandia Labs. The operators are not allowed to turn on the lights or turn off the machines, complicating the operation. | Photo by Randy Montoya, Sandia National Laboratories. In the photo

  11. Automated Feature Generation in Large-Scale Geospatial Libraries for Content-Based Indexing.

    SciTech Connect (OSTI)

    Tobin Jr, Kenneth William; Bhaduri, Budhendra L; Bright, Eddie A; Cheriydat, Anil; Karnowski, Thomas Paul; Palathingal, Paul J; Potok, Thomas E; Price, Jeffery R

    2006-05-01

    We describe a method for indexing and retrieving high-resolution image regions in large geospatial data libraries. An automated feature extraction method is used that generates a unique and specific structural description of each segment of a tessellated input image file. These tessellated regions are then merged into similar groups, or sub-regions, and indexed to provide flexible and varied retrieval in a query-by-example environment. The methods of tessellation, feature extraction, sub-region clustering, indexing, and retrieval are described and demonstrated using a geospatial library representing a 153 km2 region of land in East Tennessee at 0.5 m per pixel resolution.

  12. Ames Lab's Sun Ranger solar-powered pickup featured | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab's Sun Ranger solar-powered pickup featured Insider for August 1991 had an extensive feature on a solar-powered Ford Ranger pickup. The Sun Ranger was a 1984 Ford Ranger that was converted by the Lab's shops to run on solar power generated by bed-mounted solar panels with eight golf-cart-type batteries installed under the hood. A high efficiency, 10-pound electric motor powered the vehicle at speeds up to 50 miles an hour. Elsewhere in the issue, Karl Gschneidner and David Jiles were

  13. Hydrologic characterization of faults and other potentially conductive geologic features in the unsaturated zone

    SciTech Connect (OSTI)

    Javandel, I.; Shan, C.

    1990-01-01

    The capability of characterizing near-vertical faults and other potentially highly conductive geologic features in the vicinity of a high-level-waste repository is of great importance in site characterization of underground waste-isolation projects. The possibility of using transient air pressure data at depth for characterizing these features in the unsaturated zone are investigated. Analytical solutions for calculating the pressure response of such systems are presented. Solutions are given for two types of barometric pressure fluctuations, step function and sinusoidal. 3 refs., 9 figs.

  14. Efficient Feature-Driven Visualization of Large-Scale Scientific Data

    SciTech Connect (OSTI)

    Lu, Aidong

    2012-12-12

    Very large, complex scientific data acquired in many research areas creates critical challenges for scientists to understand, analyze, and organize their data. The objective of this project is to expand the feature extraction and analysis capabilities to develop powerful and accurate visualization tools that can assist domain scientists with their requirements in multiple phases of scientific discovery. We have recently developed several feature-driven visualization methods for extracting different data characteristics of volumetric datasets. Our results verify the hypothesis in the proposal and will be used to develop additional prototype systems.

  15. Design Features and Technology Uncertainties for the Next Generation Nuclear Plant

    SciTech Connect (OSTI)

    John M. Ryskamp; Phil Hildebrandt; Osamu Baba; Ron Ballinger; Robert Brodsky; Hans-Wolfgang Chi; Dennis Crutchfield; Herb Estrada; Jeane-Claude Garnier; Gerald Gordon; Richard Hobbins; Dan Keuter; Marilyn Kray; Philippe Martin; Steve Melancon; Christian Simon; Henry Stone; Robert Varrin; Werner von Lensa

    2004-06-01

    This report presents the conclusions, observations, and recommendations of the Independent Technology Review Group (ITRG) regarding design features and important technology uncertainties associated with very-high-temperature nuclear system concepts for the Next Generation Nuclear Plant (NGNP). The ITRG performed its reviews during the period November 2003 through April 2004.

  16. Rational Design of Rhodium Complexes Featuring κ4-N,N,N,N- and...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Rational Design of Rhodium Complexes Featuring 4-N,N,N,N- and 5-N,N,N,P,P-Bis(imino)py... Authors: Ben-Daat, H., Hall, G.B., Groy, T.L., and Trovitch, R.J Title: Rational Design of ...

  17. Dynamic-Feature Extraction, Attribution and Reconstruction (DEAR) Method for Power System Model Reduction

    SciTech Connect (OSTI)

    Wang, Shaobu; Lu, Shuai; Zhou, Ning; Lin, Guang; Elizondo, Marcelo A.; Pai, M. A.

    2014-09-04

    In interconnected power systems, dynamic model reduction can be applied on generators outside the area of interest to mitigate the computational cost with transient stability studies. This paper presents an approach of deriving the reduced dynamic model of the external area based on dynamic response measurements, which comprises of three steps, dynamic-feature extraction, attribution and reconstruction (DEAR). In the DEAR approach, a feature extraction technique, such as singular value decomposition (SVD), is applied to the measured generator dynamics after a disturbance. Characteristic generators are then identified in the feature attribution step for matching the extracted dynamic features with the highest similarity, forming a suboptimal basis of system dynamics. In the reconstruction step, generator state variables such as rotor angles and voltage magnitudes are approximated with a linear combination of the characteristic generators, resulting in a quasi-nonlinear reduced model of the original external system. Network model is un-changed in the DEAR method. Tests on several IEEE standard systems show that the proposed method gets better reduction ratio and response errors than the traditional coherency aggregation methods.

  18. Feature-based Analysis of Plasma-based Particle Acceleration Data

    SciTech Connect (OSTI)

    Ruebel, Oliver; Geddes, Cameron G.R.; Chen, Min; Cormier-Michel, Estelle; Bethel, E. Wes

    2013-07-05

    Plasma-based particle accelerators can produce and sustain thousands of times stronger acceleration fields than conventional particle accelerators, providing a potential solution to the problem of the growing size and cost of conventional particle accelerators. To facilitate scientific knowledge discovery from the ever growing collections of accelerator simulation data generated by accelerator physicists to investigate next-generation plasma-based particle accelerator designs, we describe a novel approach for automatic detection and classification of particle beams and beam substructures due to temporal differences in the acceleration process, here called acceleration features. The automatic feature detection in combination with a novel visualization tool for fast, intuitive, query-based exploration of acceleration features enables an effective top-down data exploration process, starting from a high-level, feature-based view down to the level of individual particles. We describe the application of our analysis in practice to analyze simulations of single pulse and dual and triple colliding pulse accelerator designs, and to study the formation and evolution of particle beams, to compare substructures of a beam and to investigate transverse particle loss.

  19. Method for photolithographic definition of recessed features on a semiconductor wafer utilizing auto-focusing alignment

    DOE Patents [OSTI]

    Farino, Anthony J.; Montague, Stephen; Sniegowski, Jeffry J.; Smith, James H.; McWhorter, Paul J.

    1998-01-01

    A method is disclosed for photolithographically defining device features up to the resolution limit of an auto-focusing projection stepper when the device features are to be formed in a wafer cavity at a depth exceeding the depth of focus of the stepper. The method uses a focusing cavity located in a die field at the position of a focusing light beam from the auto-focusing projection stepper, with the focusing cavity being of the same depth as one or more adjacent cavities wherein a semiconductor device is to be formed. The focusing cavity provides a bottom surface for referencing the focusing light beam and focusing the stepper at a predetermined depth below the surface of the wafer, whereat the device features are to be defined. As material layers are deposited in each device cavity to build up a semiconductor structure such as a microelectromechanical system (MEMS) device, the same material layers are deposited in the focusing cavity, raising the bottom surface and re-focusing the stepper for accurately defining additional device features in each succeeding material layer. The method is especially applicable for forming MEMS devices within a cavity or trench and integrating the MEMS devices with electronic circuitry fabricated on the wafer surface.

  20. Method for photolithographic definition of recessed features on a semiconductor wafer utilizing auto-focusing alignment

    DOE Patents [OSTI]

    Farino, A.J.; Montague, S.; Sniegowski, J.J.; Smith, J.H.; McWhorter, P.J.

    1998-07-21

    A method is disclosed for photolithographically defining device features up to the resolution limit of an auto-focusing projection stepper when the device features are to be formed in a wafer cavity at a depth exceeding the depth of focus of the stepper. The method uses a focusing cavity located in a die field at the position of a focusing light beam from the auto-focusing projection stepper, with the focusing cavity being of the same depth as one or more adjacent cavities wherein a semiconductor device is to be formed. The focusing cavity provides a bottom surface for referencing the focusing light beam and focusing the stepper at a predetermined depth below the surface of the wafer, whereat the device features are to be defined. As material layers are deposited in each device cavity to build up a semiconductor structure such as a microelectromechanical system (MEMS) device, the same material layers are deposited in the focusing cavity, raising the bottom surface and re-focusing the stepper for accurately defining additional device features in each succeeding material layer. The method is especially applicable for forming MEMS devices within a cavity or trench and integrating the MEMS devices with electronic circuitry fabricated on the wafer surface. 15 figs.

  1. Seismic expression of structural features on Landsat lineaments: an example from Denver basin

    SciTech Connect (OSTI)

    Shurr, G.W.; Jenkins, J.T. Jr.; Likarish, D.M.

    1985-02-01

    Lineaments interpreted from Landsat images mark the location and trend of basement faults observed on seismic lines in the eastern Denver basin. Linear features mapped as tone and texture patterns on multispectral scanner images in northeastern Colorado and southwestern Nebraska are used to interpret regional lineaments. Individual linear features up to 25 mi (40 km) long and visible on both bands 5 and 7 define a grid of regional lineaments trending northeast and northwest. Comparisons of lineaments with aeromagnetic and gravity maps and with interpretations of basement geology suggest that lineaments are the boundaries of basement blocks with areas of about 1000 mi/sup 2/ (2590 km/sup 2/). Constituent linear features within the lineament zone probably mark boundaries of smaller blocks of about 50 mi/sup 2/ (130 km/sup 2/). Seismic lines in northeastern Sedgwick County in extreme northeastern Colorado cross linear features that are components of a broad regional lineament that trends northeast and parallels the South Platte River. Seismic data consist of a grid of about 100 mi (160 km) of multifold Vibroseis lines. Basement faults, generally with offsets of less than 100 ft (30 m), are observed in seismic lines that cross some individual linear features. Monoclines and faults are present in Pennsylvanian to Tertiary strata that overlie basement. A time-structure map on the Precambrian and an isochron map of Wolfcamp (Lower Permian) to Precambrian show that the lineament is a 7-mi (11-km) wide zone of small, downdropped basement blocks. Thickening of Permian-Pennsylvanian strata on the downthrown side of faults suggests tectonic activity. Further tectonic activity is indicated by listric faulting in the Cretaceous Niobrara Formation.

  2. Electromagnetic turbulent structures: A ubiquitous feature of the edge region of toroidal plasma configurations

    SciTech Connect (OSTI)

    Spolaore, M. Vianello, N.; Agostini, M.; Cavazzana, R.; De Masi, G.; Martines, E.; Momo, B.; Scaggion, A.; Scarin, P.; Spagnolo, S.; Spizzo, G.; Zuin, M.; Furno, I.; Avino, F.; Fasoli, A.; Theiler, C.; Carralero, D.; Alonso, J. A.; Hidalgo, C.

    2015-01-15

    Electromagnetic features of turbulent filaments, emerging from a turbulent plasma background, have been studied in four different magnetic configurations: the stellarator TJ-II, the Reversed Field Pinch RFX-mod, a device that can be operated also as a ohmic tokamak, and the Simple Magnetized Torus, TORPEX. By applying an analogous diagnostic concept in all cases, direct measurements of both field-aligned current density and vorticity were performed inside the filament. The inter-machine comparison reveals a clear dependence of the filament vorticity upon the local time-averaged E × B flow shear. Furthermore, a wide range of local beta was explored allowing concluding that this parameter plays a fundamental role in the appearance of filament electromagnetic features.

  3. Feature test report for the Small Debris Collection and Packaging System

    SciTech Connect (OSTI)

    Brisbin, S.A.

    1995-03-17

    The Spent Nuclear Fuel Equipment Engineering group performed feature testing of the Small Debris Collection and Packaging System (SDCPS) in the 305 Cold Test Facility from January 30, 1995, to February 1, 1995. Feature testing of the Small Debris Collection and Packaging System (SDCPS) was performed for the following reasons: To assess the feasibility of using ``drop-out`` vessels to collect small debris (<2.5 cm) in MK-II fuel canisters while transferring sludge to the Weasel Pit. To evaluate system performance under conditions similar to those in the K-Basins (e.g. submerged under 4.9 meters of water and operated with long handled tools) while using a surrogate sludge mixed with debris. To determine if canister weight could be used to predict the volume of sludge and/or debris contained within the canisters during system operation.

  4. NNSA Launches Second Travel Blog to Feature Administrator's Work at Next

    National Nuclear Security Administration (NNSA)

    Generation Safeguards Meeting in Japan | National Nuclear Security Administration | (NNSA) Launches Second Travel Blog to Feature Administrator's Work at Next Generation Safeguards Meeting in Japan October 26, 2009 WASHINGTON, D.C. - The National Nuclear Security Administration (NNSA) today launched its second travel blog, allowing online visitors to follow NNSA Administrator Thomas D'Agostino and receive updates from the second international meeting on Next Generation Safeguards in

  5. On the Features of Radiative and Convective Regimes Under the Cumulus Cloudiness

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    On the Features of Radiative and Convective Regimes Under the Cumulus Cloudiness B. M. Koprov, V. M. Koprov, G. S. Golitsyn A.M. Oboukhov Institute of Atmospheric Physics Moscow, Russia E. N. Kadygrov, A. V. Koldaev Central Aerological Observatory Dolgoprudny, Russia Introduction The study of instant temperature field transformation, convective and radiative regime perturbation within the layer of 0 to 650 m was fulfilled as caused by cloud modulation of solar radiation flux. It was made within

  6. Key features of the Talspeak and similar trivalent actinide-lanthanide partitioning processes

    SciTech Connect (OSTI)

    Nash, Kenneth L.

    2008-07-01

    As closing of the nuclear-fuel cycle via the suite of UREX processes under development in the U.S. progresses, the Trivalent Actinide-Lanthanide Separation by Phosphorus Extractants and Aqueous Komplexants (TALSPEAK) process has been selected as the baseline process for partition of trivalent actinides away from fission-product lanthanides. In this report, selected features of the chemistry of the TALSPEAK process and the limited parallel information on other TALSPEAK-like processes are discussed. (author)

  7. Study of Cost Effective Large Advanced Pressurized Water Reactors that Employ Passive Safety Features

    SciTech Connect (OSTI)

    Winters, J. W.; Corletti, M. M.; Hayashi, Y.

    2003-11-12

    A report of DOE sponsored portions of AP1000 Design Certification effort. On December 16, 1999, The United States Nuclear Regulatory Commission issued Design Certification of the AP600 standard nuclear reactor design. This culminated an 8-year review of the AP600 design, safety analysis and probabilistic risk assessment. The AP600 is a 600 MWe reactor that utilizes passive safety features that, once actuated, depend only on natural forces such as gravity and natural circulation to perform all required safety functions. These passive safety systems result in increased plant safety and have also significantly simplified plant systems and equipment, resulting in simplified plant operation and maintenance. The AP600 meets NRC deterministic safety criteria and probabilistic risk criteria with large margins. A summary comparison of key passive safety system design features is provided in Table 1. These key features are discussed due to their importance in affecting the key thermal-hydraulic phenomenon exhibited by the passive safety systems in critical areas. The scope of some of the design changes to the AP600 is described. These changes are the ones that are important in evaluating the passive plant design features embodied in the certified AP600 standard plant design. These design changes are incorporated into the AP1000 standard plant design that Westinghouse is certifying under 10 CFR Part 52. In conclusion, this report describes the results of the representative design certification activities that were partially supported by the Nuclear Energy Research Initiative. These activities are unique to AP1000, but are representative of research activities that must be driven to conclusion to realize successful licensing of the next generation of nuclear power plants in the United States.

  8. Sandia Research to Be Featured on Upcoming Cover of Journal of Physical

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chemistry B to Be Featured on Upcoming Cover of Journal of Physical Chemistry B - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing

  9. Joint Sandia/University of Texas-Austin Research Featured on the Cover of

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Journal of Physical Chemistry C Sandia/University of Texas-Austin Research Featured on the Cover of Journal of Physical Chemistry C - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power

  10. SDSS/SEGUE spectral feature analysis for stellar atmospheric parameter estimation

    SciTech Connect (OSTI)

    Li, Xiangru; Lu, Yu; Yang, Tan; Wang, Yongjun; Wu, Q. M. Jonathan; Luo, Ali; Zhao, Yongheng; Zuo, Fang

    2014-08-01

    Large-scale and deep sky survey missions are rapidly collecting a large amount of stellar spectra, which necessitate the estimation of atmospheric parameters directly from spectra and make it feasible to statistically investigate latent principles in a large data set. We present a technique for estimating parameters T{sub eff}, log g, and [Fe/H] from stellar spectra. With this technique, we first extract features from stellar spectra using the LASSO algorithm; then, the parameters are estimated from the extracted features using the support vector regression. On a subsample of 20,000 stellar spectra from the Sloan Digital Sky Survey (SDSS) with reference parameters provided by the SDSS/SEGUE Spectroscopic Parameter Pipeline, estimation consistency are 0.007458 dex for log T{sub eff} (101.609921 K for T{sub eff}), 0.189557 dex for log g, and 0.182060 for [Fe/H], where the consistency is evaluated by mean absolute error. Prominent characteristics of the proposed scheme are sparseness, locality, and physical interpretability. In this work, each spectrum consists of 3821 fluxes, and 10, 19, and 14 typical wavelength positions are detected, respectively, for estimating T{sub eff}, log g, and [Fe/H]. It is shown that the positions are related to typical lines of stellar spectra. This characteristic is important in investigating physical indications from analysis results. Then, stellar spectra can be described by the individual fluxes on the detected positions (PD) or local integration of fluxes near them (LI). The aforementioned consistency is the result based on features described by LI. If features are described by PD, consistency is 0.009092 dex for log T{sub eff} (124.545075 K for T{sub eff}), 0.198928 dex for log g, and 0.206814 dex for [Fe/H].

  11. FASTERp: A Feature Array Search Tool for Estimating Resemblance of Protein Sequences

    SciTech Connect (OSTI)

    Macklin, Derek; Egan, Rob; Wang, Zhong

    2014-03-14

    Metagenome sequencing efforts have provided a large pool of billions of genes for identifying enzymes with desirable biochemical traits. However, homology search with billions of genes in a rapidly growing database has become increasingly computationally impractical. Here we present our pilot efforts to develop a novel alignment-free algorithm for homology search. Specifically, we represent individual proteins as feature vectors that denote the presence or absence of short kmers in the protein sequence. Similarity between feature vectors is then computed using the Tanimoto score, a distance metric that can be rapidly computed on bit string representations of feature vectors. Preliminary results indicate good correlation with optimal alignment algorithms (Spearman r of 0.87, ~;;1,000,000 proteins from Pfam), as well as with heuristic algorithms such as BLAST (Spearman r of 0.86, ~;;1,000,000 proteins). Furthermore, a prototype of FASTERp implemented in Python runs approximately four times faster than BLAST on a small scale dataset (~;;1000 proteins). We are optimizing and scaling to improve FASTERp to enable rapid homology searches against billion-protein databases, thereby enabling more comprehensive gene annotation efforts.

  12. Models of the elastic x-ray scattering feature for warm dense aluminum

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Starrett, Charles Edward; Saumon, Didier

    2015-09-03

    The elastic feature of x-ray scattering from warm dense aluminum has recently been measured by Fletcher et al. [Nature Photonics 9, 274 (2015)] with much higher accuracy than had hitherto been possible. This measurement is a direct test of the ionic structure predicted by models of warm dense matter. We use the method of pseudoatom molecular dynamics to predict this elastic feature for warm dense aluminum with temperatures of 1–100 eV and densities of 2.7–8.1g/cm3. We compare these predictions to experiments, finding good agreement with Fletcher et al. and corroborating the discrepancy found in analyses of an earlier experiment ofmore » Ma et al. [Phys. Rev. Lett. 110, 065001 (2013)]. Lastly, we also evaluate the validity of the Thomas-Fermi model of the electrons and of the hypernetted chain approximation in computing the elastic feature and find them both wanting in the regime currently probed by experiments.« less

  13. Models of the elastic x-ray scattering feature for warm dense aluminum

    SciTech Connect (OSTI)

    Starrett, Charles Edward; Saumon, Didier

    2015-09-03

    The elastic feature of x-ray scattering from warm dense aluminum has recently been measured by Fletcher et al. [Nature Photonics 9, 274 (2015)] with much higher accuracy than had hitherto been possible. This measurement is a direct test of the ionic structure predicted by models of warm dense matter. We use the method of pseudoatom molecular dynamics to predict this elastic feature for warm dense aluminum with temperatures of 1–100 eV and densities of 2.7–8.1g/cm3. We compare these predictions to experiments, finding good agreement with Fletcher et al. and corroborating the discrepancy found in analyses of an earlier experiment of Ma et al. [Phys. Rev. Lett. 110, 065001 (2013)]. Lastly, we also evaluate the validity of the Thomas-Fermi model of the electrons and of the hypernetted chain approximation in computing the elastic feature and find them both wanting in the regime currently probed by experiments.

  14. The correlation study of parallel feature extractor and noise reduction approaches

    SciTech Connect (OSTI)

    Dewi, Deshinta Arrova; Sundararajan, Elankovan; Prabuwono, Anton Satria

    2015-05-15

    This paper presents literature reviews that show variety of techniques to develop parallel feature extractor and finding its correlation with noise reduction approaches for low light intensity images. Low light intensity images are normally displayed as darker images and low contrast. Without proper handling techniques, those images regularly become evidences of misperception of objects and textures, the incapability to section them. The visual illusions regularly clues to disorientation, user fatigue, poor detection and classification performance of humans and computer algorithms. Noise reduction approaches (NR) therefore is an essential step for other image processing steps such as edge detection, image segmentation, image compression, etc. Parallel Feature Extractor (PFE) meant to capture visual contents of images involves partitioning images into segments, detecting image overlaps if any, and controlling distributed and redistributed segments to extract the features. Working on low light intensity images make the PFE face challenges and closely depend on the quality of its pre-processing steps. Some papers have suggested many well established NR as well as PFE strategies however only few resources have suggested or mentioned the correlation between them. This paper reviews best approaches of the NR and the PFE with detailed explanation on the suggested correlation. This finding may suggest relevant strategies of the PFE development. With the help of knowledge based reasoning, computational approaches and algorithms, we present the correlation study between the NR and the PFE that can be useful for the development and enhancement of other existing PFE.

  15. Micro-Grooving and Micro-Threading Tools for Fabricating Curvilinear Features

    SciTech Connect (OSTI)

    ADAMS,DAVID P.; VASILE,MICHAEL J.; KRISHNAN,A.S.M.

    2000-07-24

    This paper presents techniques for fabricating microscopic, curvilinear features in a variety of workpiece materials. Micro-grooving and micro-threading tools having cutting widths as small as 13 {micro}m are made by focused ion beam sputtering and used for ultra-precision machining. Tool fabrication involves directing a 20 keV gallium beam at polished cylindrical punches made of cobalt M42 high-speed steel or C2 tungsten carbide to create a number of critically aligned facets. Sputtering produces rake facets of desired angle and cutting edges having radii of curvature equal to 0.4 {micro}m. Clearance for minimizing frictional drag of a tool results from a particular ion beam/target geometry that accounts for the sputter yield dependence on incidence angle. It is believed that geometrically specific cutting tools of this dimension have not been made previously. Numerically controlled, ultra-precision machining with micro-grooving tools results in a close match between tool width and feature size. Microtools are used to machine 13 {micro}m wide, 4 {micro}m deep, helical grooves in polymethyl methacrylate and 6061 Al cylindrical workplaces. Micro-grooving tools are also used to fabricate sinusoidal cross-section features in planar metal samples.

  16. SU-E-QI-20: A Review of Advanced PET and CT Image Features for the Evaluation of Tumor Response

    SciTech Connect (OSTI)

    Lu, W

    2014-06-15

    Purpose: To review the literature in using quantitative PET and CT image features for the evaluation of tumor response. Methods: We reviewed and summarized more than fifty papers that use advanced, quantitative PET/CT image features for the evaluation of tumor response. We also discussed future works on extracting disease-specific features, combining multiple and complementary features in response modeling, delineating tumor in multimodality images, and exploring biological explanations of these advanced features. Results: Advanced PET image features considering spatial information, such as tumor volume, tumor shape, total glycolytic volume, histogram distance, and texture features (characterizing spatial distribution of FDG uptake) have been found more informative than the traditional SUVmax for the prediction of tumor response. Advanced CT features, including volumetric, attenuation, morphologic, structure, and texture descriptors, have also been found advantage over the traditional RECIST and WHO criteria in certain tumor types. Conclusions: Advanced, quantitative FDG PET/CT image features have been shown promising for the evaluation of tumor response. With the emerging multi-modality imaging performed at multiple time points for each patient, it becomes more important to analyze the serial images quantitatively, select and combine both complementary and contradictory information from various sources, for accurate and personalized evaluation of tumor response to therapy.

  17. SU-E-QI-17: Dependence of 3D/4D PET Quantitative Image Features On Noise

    SciTech Connect (OSTI)

    Oliver, J; Budzevich, M; Zhang, G; Latifi, K; Dilling, T; Balagurunathan, Y; Gu, Y; Grove, O; Feygelman, V; Gillies, R; Moros, E; Lee, H.

    2014-06-15

    Purpose: Quantitative imaging is a fast evolving discipline where a large number of features are extracted from images; i.e., radiomics. Some features have been shown to have diagnostic, prognostic and predictive value. However, they are sensitive to acquisition and processing factors; e.g., noise. In this study noise was added to positron emission tomography (PET) images to determine how features were affected by noise. Methods: Three levels of Gaussian noise were added to 8 lung cancer patients PET images acquired in 3D mode (static) and using respiratory tracking (4D); for the latter images from one of 10 phases were used. A total of 62 features: 14 shape, 19 intensity (1stO), 18 GLCM textures (2ndO; from grey level co-occurrence matrices) and 11 RLM textures (2ndO; from run-length matrices) features were extracted from segmented tumors. Dimensions of GLCM were 256256, calculated using 3D images with a step size of 1 voxel in 13 directions. Grey levels were binned into 256 levels for RLM and features were calculated in all 13 directions. Results: Feature variation generally increased with noise. Shape features were the most stable while RLM were the most unstable. Intensity and GLCM features performed well; the latter being more robust. The most stable 1stO features were compactness, maximum and minimum length, standard deviation, root-mean-squared, I30, V10-V90, and entropy. The most stable 2ndO features were entropy, sum-average, sum-entropy, difference-average, difference-variance, difference-entropy, information-correlation-2, short-run-emphasis, long-run-emphasis, and run-percentage. In general, features computed from images from one of the phases of 4D scans were more stable than from 3D scans. Conclusion: This study shows the need to characterize image features carefully before they are used in research and medical applications. It also shows that the performance of features, and thereby feature selection, may be assessed in part by noise analysis.

  18. Science Museum

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanotechnology and algae biofuels exhibits open July 26 at the Bradbury Science Museum July 22, 2013 LOS ALAMOS, N.M., July 22, 2013-Los Alamos National Laboratory's Bradbury Science Museum is opening two new exhibits July 26 as part of the Laboratory's 70th Anniversary celebration. One is a nanotechnology exhibit featuring the Laboratory's Center for Integrated Nanotechnologies (CINT) and the other is an algae biofuel exhibit from the Laboratory and the New Mexico Consortium. An opening

  19. Consumer attitudes concerning construction features of an earth-sheltered dwelling

    SciTech Connect (OSTI)

    McKown, C. (Texas Tech Univ., Lubbock); Stewart, K.K.

    1980-01-01

    Consumer responses to construction features of earth-sheltered houses were collected from a volunteer sampling of visitors to an ''open house'' in South Carolina. Consumers reported they had not expected the exposed-front elevation, that skylights are needed in some of the darker areas, and that they were favorably impressed with the solar heating for space and water, the energy efficiency, and the low cost of construction and utilities. Savings of $3000 in initial costs and $300 in annual utility costs were specified as requirements for purchase by the majority. Responses were generally favorable, although only five percent had visted an earth-insulated or underground home before.

  20. DESIGN SAFETY FEATURES OF THE BNL HIGH-TEMPERATURE COMBUSTION FACILITY

    SciTech Connect (OSTI)

    GINSBERG,T.; CICCARELLI,G.; BOCCIO,J.

    2000-06-11

    The Brookhaven National Laboratory (BNL) High-Temperature Combustion Facility (HTCF) was used to perform hydrogen deflagration and detonation experiments at temperatures to 650 K. Safety features that were designed to ensure safe and reliable operation of the experimental program are described. Deflagration and detonation experiments have been conducted using mixtures of hydrogen, air, and steam. Detonation cell size measurements were made as a function of mixture composition and thermodynamic gas conditions. Deflagration-to-detonation transition experiments were also conducted. Results of the experimental program are presented, and implications with respect to hydrogen safety are discussed.

  1. PPPL's Earth Week features Colloquium on NYC green plan, cleanup and

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    awards | Princeton Plasma Physics Lab PPPL's Earth Week features Colloquium on NYC green plan, cleanup and awards By Jeanne Jackson DeVoe April 28, 2014 Tweet Widget Google Plus One Share on Facebook Volunteers clean up the area outside PPPL's Lyman Spitzer Building during the Earth Day cleanup at PPPL on April 22. From left to right: Virginia Finley, Julia Toth, Bill Davis, Glenn Anderson and Shannon Greco. (Photo by Elle Starkman/PPPL Office of Communications) Volunteers clean up the area

  2. Fabrication of small-scale structures with non-planar features

    SciTech Connect (OSTI)

    Burckel, David B.; Ten Eyck, Gregory A.

    2015-11-19

    The fabrication of small-scale structures is disclosed. A unit-cell of a small-scale structure with non-planar features is fabricated by forming a membrane on a suitable material. A pattern is formed in the membrane and a portion of the substrate underneath the membrane is removed to form a cavity. Resonators are then directionally deposited on the wall or sides of the cavity. The cavity may be rotated during deposition to form closed-loop resonators. The resonators may be non-planar. The unit-cells can be formed in a layer that includes an array of unit-cells.

  3. Evaluation of land ownership, lease status, and surface features in five geopressured geothermal prospects

    SciTech Connect (OSTI)

    Hackenbracht, W.N.

    1981-05-01

    This study was accomplished for the purpose of gathering information pertaining to land and lease ownership, surface features and use and relevant environmental factors in the Lake Theriot (West and East), Kaplan, Bayou Hebert and Freshwater Bayou geopressured geothermal prospects in Louisiana, and the Blessing geopressured geothermal prospect in Texas. This information and recommendations predicated upon it will then be used to augment engineering and geological data utilized to select geopressured geothermal test well sites within the prospects. The five geopressured geothermal prospects are briefly described and recommendations given.

  4. Weighted simultaneous algebraic reconstruction technique for tomosynthesis imaging of objects with high-attenuation features

    SciTech Connect (OSTI)

    Levakhina, Y. M.; Mueller, J.; Buzug, T. M.; Duschka, R. L.; Vogt, F.; Barkhausen, J.

    2013-03-15

    Purpose: This paper introduces a nonlinear weighting scheme into the backprojection operation within the simultaneous algebraic reconstruction technique (SART). It is designed for tomosynthesis imaging of objects with high-attenuation features in order to reduce limited angle artifacts. Methods: The algorithm estimates which projections potentially produce artifacts in a voxel. The contribution of those projections into the updating term is reduced. In order to identify those projections automatically, a four-dimensional backprojected space representation is used. Weighting coefficients are calculated based on a dissimilarity measure, evaluated in this space. For each combination of an angular view direction and a voxel position an individual weighting coefficient for the updating term is calculated. Results: The feasibility of the proposed approach is shown based on reconstructions of the following real three-dimensional tomosynthesis datasets: a mammography quality phantom, an apple with metal needles, a dried finger bone in water, and a human hand. Datasets have been acquired with a Siemens Mammomat Inspiration tomosynthesis device and reconstructed using SART with and without suggested weighting. Out-of-focus artifacts are described using line profiles and measured using standard deviation (STD) in the plane and below the plane which contains artifact-causing features. Artifacts distribution in axial direction is measured using an artifact spread function (ASF). The volumes reconstructed with the weighting scheme demonstrate the reduction of out-of-focus artifacts, lower STD (meaning reduction of artifacts), and narrower ASF compared to nonweighted SART reconstruction. It is achieved successfully for different kinds of structures: point-like structures such as phantom features, long structures such as metal needles, and fine structures such as trabecular bone structures. Conclusions: Results indicate the feasibility of the proposed algorithm to reduce typical

  5. Argonne National Laboratory Scientists Invent Breakthrough Technique in Nanotechnology

    Broader source: Energy.gov [DOE]

    For many years, scientists have searched for ways to assemble nanoparticles (millions of times smaller than the tip of a pencil) into larger structures of any shape and design. Argonne's team created an assembled, continuous filament of carbon and gold nanoparticles that followed the path of the laser as if it was a magic wand.

  6. DOE Science Showcase - Nanotechnology | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    to spotlight needs and target resources in this critical area of science and technology. ... DOepatents ScienceCinema Energy Citations Database Science.gov WorldWideScience.org ...

  7. Micro- & Nano-Technologies Enabling More Compact, Lightweight...

    Broader source: Energy.gov (indexed) [DOE]

    Advanced thermoelectric energy recovery and cooling system weight and volume improvements with low-cost microtechnology heat and mass transfer devices are presented hendricks.pdf ...

  8. In the OSTI Collections: Nanotechnology | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    ... catalysis; theory, modeling and simulation; electronic materials; nanoscale photonics; soft and biological materials; imaging and spectroscopy; and nanoscale integration. ...

  9. RELAP5-3D Code Includes Athena Features and Models

    SciTech Connect (OSTI)

    Richard A. Riemke; Cliff B. Davis; Richard R. Schultz

    2006-07-01

    Version 2.3 of the RELAP5-3D computer program includes all features and models previously available only in the ATHENA version of the code. These include the addition of new working fluids (i.e., ammonia, blood, carbon dioxide, glycerol, helium, hydrogen, lead-bismuth, lithium, lithium-lead, nitrogen, potassium, sodium, and sodium-potassium) and a magnetohydrodynamic model that expands the capability of the code to model many more thermal-hydraulic systems. In addition to the new working fluids along with the standard working fluid water, one or more noncondensable gases (e.g., air, argon, carbon dioxide, carbon monoxide, helium, hydrogen, krypton, nitrogen, oxygen, sf6, xenon) can be specified as part of the vapor/gas phase of the working fluid. These noncondensable gases were in previous versions of RELAP5- 3D. Recently four molten salts have been added as working fluids to RELAP5-3D Version 2.4, which has had limited release. These molten salts will be in RELAP5-3D Version 2.5, which will have a general release like RELAP5-3D Version 2.3. Applications that use these new features and models are discussed in this paper.

  10. RELAP5-3D Code Includes ATHENA Features and Models

    SciTech Connect (OSTI)

    Riemke, Richard A.; Davis, Cliff B.; Schultz, Richard R.

    2006-07-01

    Version 2.3 of the RELAP5-3D computer program includes all features and models previously available only in the ATHENA version of the code. These include the addition of new working fluids (i.e., ammonia, blood, carbon dioxide, glycerol, helium, hydrogen, lead-bismuth, lithium, lithium-lead, nitrogen, potassium, sodium, and sodium-potassium) and a magnetohydrodynamic model that expands the capability of the code to model many more thermal-hydraulic systems. In addition to the new working fluids along with the standard working fluid water, one or more noncondensable gases (e.g., air, argon, carbon dioxide, carbon monoxide, helium, hydrogen, krypton, nitrogen, oxygen, SF{sub 6}, xenon) can be specified as part of the vapor/gas phase of the working fluid. These noncondensable gases were in previous versions of RELAP5-3D. Recently four molten salts have been added as working fluids to RELAP5-3D Version 2.4, which has had limited release. These molten salts will be in RELAP5-3D Version 2.5, which will have a general release like RELAP5-3D Version 2.3. Applications that use these new features and models are discussed in this paper. (authors)

  11. Dynamic impact and pressure analysis of the insensitive munitions container PA103 with modified design features

    SciTech Connect (OSTI)

    Handy, K.D.

    1993-06-01

    This report presents analytical analyses of the insensitive munitions container PA103, with modified design features for a static internal pressure of 500 psi and for a dynamic impact resulting from a 7-ft free fall onto a rigid surface. The modified design features addressed by the analyses were the inclusion of a score pattern on the container cylindrical body and a plastic plate (fuse) sandwiched between metal flanges on the container end. The objectives of both the pressure and impact analyses were to determine if the induced stresses at the score patterns in the cylindrical body of the container were sufficient to induce failure. Analytical responses of the container to the imposed loads were obtained with finite element analysis methodology. The computer codes ABAQUS and VEC/DYNA3D were used to obtain the results. Results of the pressure analysis indicate that failure of the container body would be expected to occur at the score pattern for a static internal pressure of 500 psi. Also, results from three impact orientations for a 7-ft drop indicate that membrane stresses in the vicinity of the score pattern are above critical crack growth stress magnitudes, especially at low ([minus]60[degrees]F) temperatures.

  12. Dynamic impact and pressure analysis of the insensitive munitions container PA103 with modified design features

    SciTech Connect (OSTI)

    Handy, K.D.

    1993-06-01

    This report presents analytical analyses of the insensitive munitions container PA103, with modified design features for a static internal pressure of 500 psi and for a dynamic impact resulting from a 7-ft free fall onto a rigid surface. The modified design features addressed by the analyses were the inclusion of a score pattern on the container cylindrical body and a plastic plate (fuse) sandwiched between metal flanges on the container end. The objectives of both the pressure and impact analyses were to determine if the induced stresses at the score patterns in the cylindrical body of the container were sufficient to induce failure. Analytical responses of the container to the imposed loads were obtained with finite element analysis methodology. The computer codes ABAQUS and VEC/DYNA3D were used to obtain the results. Results of the pressure analysis indicate that failure of the container body would be expected to occur at the score pattern for a static internal pressure of 500 psi. Also, results from three impact orientations for a 7-ft drop indicate that membrane stresses in the vicinity of the score pattern are above critical crack growth stress magnitudes, especially at low ({minus}60{degrees}F) temperatures.

  13. When will low-contrast features be visible in a STEM X-ray spectrum image?

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Parish, Chad M.

    2015-02-03

    When will a small or low-contrast feature, such as an embedded second-phase particle, be visible in a scanning transmission electron microscopy (STEM) X-ray map? This work illustrates a computationally inexpensive method to simulate X-ray maps and spectrum images (SIs), based upon the equations of X-ray generation and detection. To particularize the general procedure, an example of nanostructured ferritic alloy (NFA) containing nm-sized Y2Ti2O7 embedded precipitates in ferritic stainless steel matrix is chosen. The proposed model produces physically appearing simulated SI data sets, which can either be reduced to X-ray dot maps or analyzed via multivariate statistical analysis. Comparison to NFAmore » X-ray maps acquired using three different STEM instruments match the generated simulations quite well, despite the large number of simplifying assumptions used. A figure of merit of electron dose multiplied by X-ray collection solid angle is proposed to compare feature detectability from one data set (simulated or experimental) to another. The proposed method can scope experiments that are feasible under specific analysis conditions on a given microscope. As a result, future applications, such as spallation proton–neutron irradiations, core-shell nanoparticles, or dopants in polycrystalline photovoltaic solar cells, are proposed.« less

  14. Detecting features in the dark energy equation of state: a wavelet approach

    SciTech Connect (OSTI)

    Hojjati, Alireza; Pogosian, Levon; Zhao, Gong-Bo E-mail: levon@sfu.ca

    2010-04-01

    We study the utility of wavelets for detecting the redshift evolution of the dark energy equation of state w(z) from the combination of supernovae (SNe), CMB and BAO data. We show that local features in w, such as bumps, can be detected efficiently using wavelets. To demonstrate, we first generate a mock supernovae data sample for a SNAP-like survey with a bump feature in w(z) hidden in, then successfully discover it by performing a blind wavelet analysis. We also apply our method to analyze the recently released ''Constitution'' SNe data, combined with WMAP and BAO from SDSS, and find weak hints of dark energy dynamics. Namely, we find that models with w(z) < −1 for 0.2 < z < 0.5, and w(z) > −1 for 0.5 < z < 1, are mildly favored at 95% confidence level. This is in good agreement with several recent studies using other methods, such as redshift binning with principal component analysis (PCA) (e.g. Zhao and Zhang, arXiv: 0908.1568)

  15. When will low-contrast features be visible in a STEM X-ray spectrum image?

    SciTech Connect (OSTI)

    Parish, Chad M.

    2015-02-03

    When will a small or low-contrast feature, such as an embedded second-phase particle, be visible in a scanning transmission electron microscopy (STEM) X-ray map? This work illustrates a computationally inexpensive method to simulate X-ray maps and spectrum images (SIs), based upon the equations of X-ray generation and detection. To particularize the general procedure, an example of nanostructured ferritic alloy (NFA) containing nm-sized Y2Ti2O7 embedded precipitates in ferritic stainless steel matrix is chosen. The proposed model produces physically appearing simulated SI data sets, which can either be reduced to X-ray dot maps or analyzed via multivariate statistical analysis. Comparison to NFA X-ray maps acquired using three different STEM instruments match the generated simulations quite well, despite the large number of simplifying assumptions used. A figure of merit of electron dose multiplied by X-ray collection solid angle is proposed to compare feature detectability from one data set (simulated or experimental) to another. The proposed method can scope experiments that are feasible under specific analysis conditions on a given microscope. As a result, future applications, such as spallation proton–neutron irradiations, core-shell nanoparticles, or dopants in polycrystalline photovoltaic solar cells, are proposed.

  16. WE-D-BRD-01: Innovation in Radiation Therapy Delivery: Advanced Digital Linac Features

    SciTech Connect (OSTI)

    Xing, L; Wong, J; Li, R

    2014-06-15

    Last few years has witnessed significant advances in linac technology and therapeutic dose delivery method. Digital linacs equipped with high dose rate FFF beams have been clinically implemented in a number of hospitals. Gated VMAT is becoming increasingly popular in treating tumors affected by respiratory motion. This session is devoted to update the audience with these technical advances and to present our experience in clinically implementing the new linacs and dose delivery methods. Topics to be covered include, technical features of new generation of linacs from different vendors, dosimetric characteristics and clinical need for FFF-beam based IMRT and VMAT, respiration-gated VMAT, the concept and implementation of station parameter optimized radiation therapy (SPORT), beam level imaging and onboard image guidance tools. Emphasis will be on providing fundamental understanding of the new treatment delivery and image guidance strategies, control systems, and the associated dosimetric characteristics. Commissioning and acceptance experience on these new treatment delivery technologies will be reported. Clinical experience and challenges encountered during the process of implementation of the new treatment techniques and future applications of the systems will also be highlighted. Learning Objectives: Present background knowledge of emerging digital linacs and summarize their key geometric and dosimetric features. SPORT as an emerging radiation therapy modality specifically designed to take advantage of digital linacs. Discuss issues related to the acceptance and commissioning of the digital linacs and FFF beams. Describe clinical utility of the new generation of digital linacs and their future applications.

  17. Interactive prostate segmentation using atlas-guided semi-supervised learning and adaptive feature selection

    SciTech Connect (OSTI)

    Park, Sang Hyun; Gao, Yaozong; Shi, Yinghuan; Shen, Dinggang

    2014-11-01

    Purpose: Accurate prostate segmentation is necessary for maximizing the effectiveness of radiation therapy of prostate cancer. However, manual segmentation from 3D CT images is very time-consuming and often causes large intra- and interobserver variations across clinicians. Many segmentation methods have been proposed to automate this labor-intensive process, but tedious manual editing is still required due to the limited performance. In this paper, the authors propose a new interactive segmentation method that can (1) flexibly generate the editing result with a few scribbles or dots provided by a clinician, (2) fast deliver intermediate results to the clinician, and (3) sequentially correct the segmentations from any type of automatic or interactive segmentation methods. Methods: The authors formulate the editing problem as a semisupervised learning problem which can utilize a priori knowledge of training data and also the valuable information from user interactions. Specifically, from a region of interest near the given user interactions, the appropriate training labels, which are well matched with the user interactions, can be locally searched from a training set. With voting from the selected training labels, both confident prostate and background voxels, as well as unconfident voxels can be estimated. To reflect informative relationship between voxels, location-adaptive features are selected from the confident voxels by using regression forest and Fisher separation criterion. Then, the manifold configuration computed in the derived feature space is enforced into the semisupervised learning algorithm. The labels of unconfident voxels are then predicted by regularizing semisupervised learning algorithm. Results: The proposed interactive segmentation method was applied to correct automatic segmentation results of 30 challenging CT images. The correction was conducted three times with different user interactions performed at different time periods, in order to

  18. Special features of the alpha induced d and polarized d breakup

    SciTech Connect (OSTI)

    Lambert, J.M.; Treado, P.A.; Koike, Y.; Slaus, I.; Correll, F.D.; Brown, R.E.; Hardekopf, R.A.; Jarmie, N.

    1982-01-01

    The alpha induced deuteron breakup reactions have been of interest since the three-nucleon, nucleon induced deuteron breakup, problem was addressed with tractable and predictive codes based on the Faddeev formalism and with appropriate nucleon-nucleon forces. In this paper we discuss a few special features of the alpha induced deuteron breakup reactions. Specifically, we point out the importance of the n-p tensor force in the predictions of the three-body model that fit the tensor analyzing powers better and the concommittent deterioration of the fit to the vector analyzing power caused by the inclusion of the tensor force. We suggest that there exists evidence for the /sup 1/S/sub 0/ n-p interaction, which is isospin forbidden, in both the cross section and spin observables data. Finally, we discuss certain characteristics of the p-..cap alpha.. quasifree-scattering and n-..cap alpha.. final-state-interaction processes.

  19. Distinctive microstructural features of aged sodium silicate-activated slag concretes

    SciTech Connect (OSTI)

    San Nicolas, Rackel; Bernal, Susan A.; Mejía de Gutiérrez, Ruby; Deventer, Jannie S.J. van; Provis, John L.

    2014-11-15

    Electron microscopic characterisation of 7-year old alkali-activated blast-furnace slag concretes enabled the identification of distinct microstructural features, providing insight into the mechanisms by which these materials evolve over time. Backscattered electron images show the formation of Liesegang-type ring formations, suggesting that the reaction at advanced age is likely to follow an Oswald supersaturation–nucleation–depletion cycle. Segregation of Ca-rich veins, related to the formation of Ca(OH){sub 2}, is observed in microcracked regions due to the ongoing reaction between the pore solution and available calcium from remnant slag grains. A highly dense and uniform interfacial transition zone is identified between siliceous aggregate particles and the alkali activated slag binders, across the concretes assessed. Alkali-activated slag concretes retain a highly dense and stable microstructure at advanced ages, where any microcracks induced at early ages seem to be partially closing, and the remnant slag grains continue reacting.

  20. Influence of hot spot features on the initiation characteristics of heterogeneous nitromethane

    SciTech Connect (OSTI)

    Dattelbaum, Dana M; Sheffield, Stephen A; Stahl, David B; Dattelbaum, Andrew M; Engelke, Ray

    2010-01-01

    To gain insights into the critical hot spot features influencing energetic materials initiation characteristics, well-defined micron-scale particles have been intentionally introduced into the homogeneous explosive nitromethane (NM). Two types of potential hot spot origins have been examined - shock impedance mismatches using solid silica beads, and porosity using hollow microballoons - as well as their sizes and inter-particle separations. Here, we present the results of several series of gas gun-driven plate impact experiments on NM/particle mixtures with well-controlled shock inputs. Detailed insights into the nature of the reactive flow during the build-up to detonation have been obtained from the response of in-situ electromagnetic gauges, and the data have been used to establish Pop-plots (run-distance-to-detonation vs. shock input pressure) for the mixtures. Comparisons of sensitization effects and energy release characteristics relative to the initial shock front between the solid and hollow beads are presented.

  1. Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC

    SciTech Connect (OSTI)

    Lehman, S K

    2006-02-09

    We developed an ultrasonic longitudinal field time-reversal and MUltiple SIgnal Classification (MUSIC) based detection algorithm for identifying and mapping flaws in fused silica NIF optics. The algorithm requires a fully multistatic data set, that is one with multiple, independently operated, spatially diverse transducers, each transmitter of which, in succession, launches a pulse into the optic and the scattered signal measured and recorded at every receiver. We have successfully localized engineered ''defects'' larger than 1 mm in an optic. We confirmed detection and localization of 3 mm and 5 mm features in experimental data, and a 0.5 mm in simulated data with sufficiently high signal-to-noise ratio. We present the theory, experimental results, and simulated results.

  2. Highly featured amorphous silicon nanorod arrays for high-performance lithium-ion batteries

    SciTech Connect (OSTI)

    Soleimani-Amiri, Samaneh; Safiabadi Tali, Seied Ali; Azimi, Soheil; Sanaee, Zeinab; Mohajerzadeh, Shamsoddin

    2014-11-10

    High aspect-ratio vertical structures of amorphous silicon have been realized using hydrogen-assisted low-density plasma reactive ion etching. Amorphous silicon layers with the thicknesses ranging from 0.5 to 10 μm were deposited using radio frequency plasma enhanced chemical vapor deposition technique. Standard photolithography and nanosphere colloidal lithography were employed to realize ultra-small features of the amorphous silicon. The performance of the patterned amorphous silicon structures as a lithium-ion battery electrode was investigated using galvanostatic charge-discharge tests. The patterned structures showed a superior Li-ion battery performance compared to planar amorphous silicon. Such structures are suitable for high current Li-ion battery applications such as electric vehicles.

  3. AFREET: HUMAN-INSPIRED SPATIO-SPECTRAL FEATURE CONSTRUCTION FOR IMAGE CLASSIFICATION WITH SUPPORT VECTOR MACHINES

    SciTech Connect (OSTI)

    S. PERKINS; N. HARVEY

    2001-02-01

    The authors examine the task of pixel-by-pixel classification of the multispectral and grayscale images typically found in remote-sensing and medical applications. Simple machine learning techniques have long been applied to remote-sensed image classification, but almost always using purely spectral information about each pixel. Humans can often outperform these systems, and make extensive use of spatial context to make classification decisions. They present AFREET: an SVM-based learning system which attempts to automatically construct and refine spatio-spectral features in a somewhat human-inspired fashion. Comparisons with traditionally used machine learning techniques show that AFREET achieves significantly higher performance. The use of spatial context is particularly useful for medical imagery, where multispectral images are still rare.

  4. RW Aur A FROM THE X-WIND POINT OF VIEW: GENERAL FEATURES

    SciTech Connect (OSTI)

    Liu, Chun-Fan; Shang, Hsien

    2012-12-20

    In this paper, the RW Aur A microjet is studied from the point of view of X-wind models. The archived Hubble Space Telescope/STIS spectra of the optical forbidden lines [O I], [S II], and [N II] from RW Aur A, taken in Cycle 8 with seven parallel slits along the jet axis, spaced at 0.''07 apart, were analyzed. Images, position-velocity diagrams, and line ratios among the species were constructed, and compared with synthetic observations generated by selected solutions of the X-wind. Prominent features arising in a steady-state X-wind could be identified within the convolved images and position-velocity diagrams, including FWHM and high-velocity peaks on both of the redshifted and blueshifted jets. The well-known asymmetric velocity profiles of the opposite jets were built into the selected models. We discuss model selections within the existing uncertainties of the stellar parameters and inclination angle of the system. In this framework, the mass-loss rates that were inferred to be decreasing along the jet axis in the literature are the results of slowly decreasing excitation conditions and electron density profiles. Despite the apparent asymmetry in the terminal velocities, line intensities and mass-loss rates, the average linear momenta from the opposite sides of the jet are actually balanced. These previously hard-to-explain features of the asymmetric RW Aur A jet system can now be interpreted in a different but self-consistent manner within the X-wind framework.

  5. Detailed Hydrographic Feature Extraction from High-Resolution LiDAR Data

    SciTech Connect (OSTI)

    Danny L. Anderson

    2012-05-01

    Detailed hydrographic feature extraction from high-resolution light detection and ranging (LiDAR) data is investigated. Methods for quantitatively evaluating and comparing such extractions are presented, including the use of sinuosity and longitudinal root-mean-square-error (LRMSE). These metrics are then used to quantitatively compare stream networks in two studies. The first study examines the effect of raster cell size on watershed boundaries and stream networks delineated from LiDAR-derived digital elevation models (DEMs). The study confirmed that, with the greatly increased resolution of LiDAR data, smaller cell sizes generally yielded better stream network delineations, based on sinuosity and LRMSE. The second study demonstrates a new method of delineating a stream directly from LiDAR point clouds, without the intermediate step of deriving a DEM. Direct use of LiDAR point clouds could improve efficiency and accuracy of hydrographic feature extractions. The direct delineation method developed herein and termed “mDn”, is an extension of the D8 method that has been used for several decades with gridded raster data. The method divides the region around a starting point into sectors, using the LiDAR data points within each sector to determine an average slope, and selecting the sector with the greatest downward slope to determine the direction of flow. An mDn delineation was compared with a traditional grid-based delineation, using TauDEM, and other readily available, common stream data sets. Although, the TauDEM delineation yielded a sinuosity that more closely matches the reference, the mDn delineation yielded a sinuosity that was higher than either the TauDEM method or the existing published stream delineations. Furthermore, stream delineation using the mDn method yielded the smallest LRMSE.

  6. The AP1000{sup R} nuclear power plant innovative features for extended station blackout mitigation

    SciTech Connect (OSTI)

    Vereb, F.; Winters, J.; Schulz, T.; Cummins, E.; Oriani, L. [Westinghouse Electric Company LLC, 1000 Westinghouse Drive, Cranberry Township, PA 16066 (United States)

    2012-07-01

    Station Blackout (SBO) is defined as 'a condition wherein a nuclear power plant sustains a loss of all offsite electric power system concurrent with turbine trip and unavailability of all onsite emergency alternating current (AC) power system. Station blackout does not include the loss of available AC power to buses fed by station batteries through inverters or by alternate AC sources as defined in this section, nor does it assume a concurrent single failure or design basis accident...' in accordance with Reference 1. In this paper, the innovative features of the AP1000 plant design are described with their operation in the scenario of an extended station blackout event. General operation of the passive safety systems are described as well as the unique features which allow the AP1000 plant to cope for at least 7 days during station blackout. Points of emphasis will include: - Passive safety system operation during SBO - 'Fail-safe' nature of key passive safety system valves; automatically places the valve in a conservatively safe alignment even in case of multiple failures in all power supply systems, including normal AC and battery backup - Passive Spent Fuel Pool cooling and makeup water supply during SBO - Robustness of AP1000 plant due to the location of key systems, structures and components required for Safe Shutdown - Diverse means of supplying makeup water to the Passive Containment Cooling System (PCS) and the Spent Fuel Pool (SFP) through use of an engineered, safety-related piping interface and portable equipment, as well as with permanently installed onsite ancillary equipment. (authors)

  7. Retrieval Using Texture Features in High Resolution Multi-spectral Satellite Imagery

    SciTech Connect (OSTI)

    Newsam, S D; Kamath, C

    2004-01-22

    Texture features have long been used in remote sensing applications to represent and retrieve image regions similar to a query region. Various representations of texture have been proposed based on the Fourier power spectrum, spatial co-occurrence, wavelets, Gabor filters, etc. These representations vary in their computational complexity and their suitability for representing different region types. Much of the work done thus far has focused on panchromatic imagery at low to moderate spatial resolutions, such as images from Landsat 1-7 which have a resolution of 15-30 m/pixel, and from SPOT 1-5 which have a resolution of 2.5-20 m/pixel. However, it is not clear which texture representation works best for the new classes of high resolution panchromatic (60-100 cm/pixel) and multi-spectral (4 bands for red, green, blue, and near infra-red at 2.4-4 m/pixel) imagery. It is also not clear how the different spectral bands should be combined. In this paper, we investigate the retrieval performance of several different texture representations using multi-spectral satellite images from IKONOS. A query-by-example framework, along with a manually chosen ground truth dataset, allows different combinations of texture representations and spectral bands to be compared. We focus on the specific problem of retrieving inhabited regions from images of urban and rural scenes. Preliminary results show that (1) the use of all spectral bands improves the retrieval performance, and (2) co-occurrence, wavelet and Gabor texture features perform comparably.

  8. Combined features in the primordial spectra induced by a sudden turn in two-field DBI inflation

    SciTech Connect (OSTI)

    Mizuno, Shuntaro; Saito, Ryo; Langlois, David E-mail: rsaito@apc.univ-paris7.fr

    2014-11-01

    We investigate the features generated by a sharp turn along the inflationary trajectory in a two-field model of Dirac-Born-Infeld inflation, where one of the fields is heavy. Distinct features are generated by two different effects: the mixing of the light and heavy modes during the turn, on the one hand, and the resonance between the oscillations along the heavy direction after the turn, on the other hand. Contrary to models with standard kinetic terms, the resonance effect is not strongly suppressed because the action contains derivative interactions. Working in the potential basis, we study the oscillations after the turn and compute the amplitude of the mixing and resonance features in the power spectrum, as well as in the bispectrum for the latter effect. We find that the amplitudes and positions of these combined features obey specific consistency relations, which could be confronted with cosmological data.

  9. Microdevice having interior cavity with high aspect ratio surface features and associated methods of manufacture and use

    DOE Patents [OSTI]

    Morales, Alfredo M.

    2002-01-01

    A microdevice having interior cavity with high aspect ratio features and ultrasmooth surfaces, and associated method of manufacture and use is described. An LIGA-produced shaped bit is used to contour polish the surface of a sacrificial mandrel. The contoured sacrificial mandrel is subsequently coated with a structural material and the mandrel removed to produce microdevices having micrometer-sized surface features and sub-micrometer RMS surface roughness.

  10. Specific features of the behaviour of targets under negative pressures created by a picosecond laser pulse

    SciTech Connect (OSTI)

    Abrosimov, S A; Bazhulin, A P; Voronov, Valerii V; Geras'kin, A A; Krasyuk, Igor K; Pashinin, Pavel P; Semenov, Andrei Yu; Stuchebryukhov, I A; Khishchenko, K V; Fortov, Vladimir E

    2013-03-31

    New experimental data are obtained concerning the character of spallation and the mechanical strength of targets made of aluminium, aluminium - magnesium alloy (AMg6M), polymethylmethacrylate (PMMA, plexiglass), tantalum, copper, tungsten, palladium, silicon, and lead under the impact of laser radiation with the duration 70 ps. The specific features of the spallation phenomenon, in which the separation of a part of the target substance occurs at the back surface as a result of the effect of negative pressures (tensile stresses) in the substance, are experimentally studied. To determine the time moment of spallation, the electrocontact method of measuring the velocity of the spalled layer is developed and implemented. The obtained results show that the values of spall strength of the studied materials at moderate amplitudes of the shock-wave effect agree with the known literature data, while at higher pressures the growth of spall strength is observed, which is an evidence of the material hardening. The results of the studies demonstrate that the dynamic strength of a substance depends on both the duration and the amplitude of the shock-wave impact on the target. (extreme light fields and their applications)

  11. Nanoporous Gold as a Neural Interface Coating: Effects of Topography, Surface Chemistry, and Feature Size

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Chapman, Christopher A. R.; Chen, Hao; Stamou, Marianna; Biener, Juergen; Biener, Monika M.; Lein, Pamela J.; Seker, Erkin

    2015-02-23

    We report that designing neural interfaces that maintain close physical coupling of neurons to an electrode surface remains a major challenge for both implantable and in vitro neural recording electrode arrays. Typically, low-impedance nanostructured electrode coatings rely on chemical cues from pharmaceuticals or surface-immobilized peptides to suppress glial scar tissue formation over the electrode surface (astrogliosis), which is an obstacle to reliable neuron–electrode coupling. Nanoporous gold (np-Au), produced by an alloy corrosion process, is a promising candidate to reduce astrogliosis solely through topography by taking advantage of its tunable length scale. In the present in vitro study on np-Au’s interactionmore » with cortical neuron–glia co-cultures, we demonstrate that the nanostructure of np-Au achieves close physical coupling of neurons by maintaining a high neuron-to-astrocyte surface coverage ratio. Atomic layer deposition-based surface modification was employed to decouple the effect of morphology from surface chemistry. Additionally, length scale effects were systematically studied by controlling the characteristic feature size of np-Au through variations in the dealloying conditions. In conclusion, our results show that np-Au nanotopography, not surface chemistry, reduces astrocyte surface coverage while maintaining high neuronal coverage and may enhance neuron–electrode coupling through nanostructure-mediated suppression of scar tissue formation.« less

  12. Structural and superconducting features of Tl-1223 prepared at ambient pressure

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shipra, Fnu; Idrobo Tapia, Juan Carlos; Sefat, Athena Safa

    2015-09-25

    This study provides an account of the bulk preparation of TlBa2Ca2Cu3O9-δ (Tl-1223) superconductor at ambient pressure, and the Tc features under thermal-annealing conditions. The ‘as-prepared’ Tl-1223 (Tc =106 K) presents a significantly higher Tc = 125 K after annealing the polycrystalline material in either flowing Ar+4% H2, or N2 gases. In order to understand the fundamental reasons for a particular Tc, we refined the average bulk structures using powder X-ray diffraction data. Although Ar+4%H2 annealed Tl- 1223 shows an increased ‘c’ lattice parameter, it shrinks by 0.03% (approximately unchanged) upon N2 anneal. Due to such indeterminate conclusions on the averagemore » structural changes, local structures were investigated at using aberration-corrected scanning-transmission electron microscopy technique. Similar compositional changes in the atomic arrangements of both annealed-samples of Tl-1223 were detected in which the plane containing Ca atomic layer gives a non-uniform contrast, due to substitution of some heavier Tl. In this report, extensive bulk properties are summarized through temperature-dependent resistivity, and shielding and Meissner fractions of magnetic susceptibility results; the bulk and local structures are investigated to correlate to properties.« less

  13. Key wintertime meteorological features of the Grand Canyon and the Colorado Plateaus Basin

    SciTech Connect (OSTI)

    Whiteman, C.D.; Allwine, K.J.

    1992-06-01

    In the winter of 1989--1990 a major meteorological and air pollution experiment was conducted in the Colorado Plateaus Basin (Richards et al., 1991). The focus of the experiment, conducted by Arizona's Soft River Project, was to investigate the influence of three 750-MW coal-fired power plant units at the Navajo Generating Station near Page, Arizona, on visibility at Grand Canyon National Park. As part of the meteorological experiment, surface and upper air data were collected from multiple sites within the basin. This data set is the most comprehensive meteorological data set ever collected within the region, and the purpose of this paper is to briefly summarize the key wintertime meteorological features of the Colorado Plateaus Basin and the Grand Canyon, through which the basin drains, using analyses of the Winter Visibility Study data. Our analyses focused primarily on thermally driven circulations within the basin and the Grand Canyon, but we also investigated the surface energy budget that drives these circulations and the interactions between the thermal circulations and the overlying synoptic-scale flows.

  14. Key wintertime meteorological features of the Grand Canyon and the Colorado Plateaus Basin

    SciTech Connect (OSTI)

    Whiteman, C.D.; Allwine, K.J.

    1992-06-01

    In the winter of 1989--1990 a major meteorological and air pollution experiment was conducted in the Colorado Plateaus Basin (Richards et al., 1991). The focus of the experiment, conducted by Arizona`s Soft River Project, was to investigate the influence of three 750-MW coal-fired power plant units at the Navajo Generating Station near Page, Arizona, on visibility at Grand Canyon National Park. As part of the meteorological experiment, surface and upper air data were collected from multiple sites within the basin. This data set is the most comprehensive meteorological data set ever collected within the region, and the purpose of this paper is to briefly summarize the key wintertime meteorological features of the Colorado Plateaus Basin and the Grand Canyon, through which the basin drains, using analyses of the Winter Visibility Study data. Our analyses focused primarily on thermally driven circulations within the basin and the Grand Canyon, but we also investigated the surface energy budget that drives these circulations and the interactions between the thermal circulations and the overlying synoptic-scale flows.

  15. Diagenetic features of Trenton Limestone in northern Indiana: petrographic evidence for Late (Mesogenetic) Dolostone

    SciTech Connect (OSTI)

    Fara, D.R.

    1986-08-01

    Three conventional cores of the entire Trenton section were examined in detail by in-depth visual description, analysis of more than 250 thin sections, scanning electron microscopy, and x-ray diffraction. The cores are located in the northern half of Indiana where they span the major dolostone pinch-out that is the trap for the prolific Trenton oil and gas field. The Trenton Limestone is completely dolomitized in northern Indiana. Dolostone abundance decreases to the south where the dolostone is restricted to the upper few feet of the formation. Two major types of dolostone are recognized. The top 5-20 ft of the Trenton cores consists of medium crystalline nonporous xenotopic ferroan dolostone. Mesogenetic dewatering of the overlying Maquoketa shale is the proposed dolomitizing mechanisms for this ferroan dolostone cap. Below the ferroan dolostone cap in northern Indiana is coarsely crystalline dolostone, which consists of thin intercalated subfacies of porous idiotopic and nonporous xenotopic dolostone. This is the dominant dolostone type and is the reservoir in the Trenton field. The coarsely crystalline dolostone postdates the ferroan dolostone cap, chert nodule formation, and initial pressure solution. Therefore, this dolostone is considered to have formed relatively late in the diagenetic history of the Trenton under mesogenetic conditions. In the northernmost core, nearly all of the secondary dolomitic porosity is plugged by poikilotopic gypsum and minor amounts of calcite and celestite. Other diagenetic features observed in Trenton are also discussed, including silicification, ferroan calcite cement, upper Trenton contact formation, hardgrounds, and pressure solution.

  16. New positron spectral features from supersymmetric dark matter: A way to explain the PAMELA data?

    SciTech Connect (OSTI)

    Bergstroem, Lars; Bringmann, Torsten; Edsjoe, Joakim

    2008-11-15

    The space-borne antimatter experiment PAMELA has recently reported a surprising rise in the positron to electron ratio at high energies. It has also recently been found that electromagnetic radiative corrections in some cases may boost the gamma-ray yield from supersymmetric dark-matter annihilations in the galactic halo by up to 3 or 4 orders of magnitude, providing distinct spectral signatures for indirect dark matter searches to look for. Here, we investigate whether the same type of corrections can also lead to sizeable enhancements in the positron yield. We find that this is indeed the case, albeit for a smaller region of parameter space than for gamma rays; selecting models with a small mass difference between the neutralino and sleptons, like in the stau-coannihilation region in mSUGRA, the effect becomes more pronounced. The resulting, rather hard positron spectrum with a relatively sharp cutoff may potentially fit the rising positron ratio measured by the PAMELA satellite. To do so, however, very large 'boost factors' have to be invoked that are not expected in current models of halo structure. If the predicted cutoff would also be confirmed by later PAMELA data or upcoming experiments, one could either assume nonthermal production in the early universe or nonstandard halo formation to explain such a spectral feature as an effect of dark-matter annihilation. At the end of the paper, we briefly comment on the impact of radiative corrections on other annihilation channels, in particular, antiprotons and neutrinos.

  17. Nanoporous Gold as a Neural Interface Coating: Effects of Topography, Surface Chemistry, and Feature Size

    SciTech Connect (OSTI)

    Chapman, Christopher A. R.; Chen, Hao; Stamou, Marianna; Biener, Juergen; Biener, Monika M.; Lein, Pamela J.; Seker, Erkin

    2015-02-23

    We report that designing neural interfaces that maintain close physical coupling of neurons to an electrode surface remains a major challenge for both implantable and in vitro neural recording electrode arrays. Typically, low-impedance nanostructured electrode coatings rely on chemical cues from pharmaceuticals or surface-immobilized peptides to suppress glial scar tissue formation over the electrode surface (astrogliosis), which is an obstacle to reliable neuron–electrode coupling. Nanoporous gold (np-Au), produced by an alloy corrosion process, is a promising candidate to reduce astrogliosis solely through topography by taking advantage of its tunable length scale. In the present in vitro study on np-Au’s interaction with cortical neuron–glia co-cultures, we demonstrate that the nanostructure of np-Au achieves close physical coupling of neurons by maintaining a high neuron-to-astrocyte surface coverage ratio. Atomic layer deposition-based surface modification was employed to decouple the effect of morphology from surface chemistry. Additionally, length scale effects were systematically studied by controlling the characteristic feature size of np-Au through variations in the dealloying conditions. In conclusion, our results show that np-Au nanotopography, not surface chemistry, reduces astrocyte surface coverage while maintaining high neuronal coverage and may enhance neuron–electrode coupling through nanostructure-mediated suppression of scar tissue formation.

  18. Hard X-ray emission and {sup 44}Ti line features of the Tycho supernova remnant

    SciTech Connect (OSTI)

    Wang, Wei [National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012 (China); Li, Zhuo, E-mail: wangwei@bao.ac.cn, E-mail: zhuo.li@pku.edu.cn [Department of Astronomy and Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871 (China)

    2014-07-10

    A deep hard X-ray survey of the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has detected for the first time non-thermal emission up to 90 keV in the Tycho supernova (SN) remnant. Its 3-100 keV spectrum is fitted with a thermal bremsstrahlung of kT ? 0.81 0.45 keV plus a power-law model of ? ? 3.01 0.16. Based on diffusive shock acceleration theory, this non-thermal emission, together with radio measurements, implies that the Tycho remnant may not accelerate protons up to >PeV but to hundreds TeV. Only heavier nuclei may be accelerated to the cosmic ray spectral 'knee'. In addition, using INTEGRAL, we search for soft gamma-ray lines at 67.9 and 78.4 keV that come from the decay of radioactive {sup 44}Ti in the Tycho remnant. A bump feature in the 60-90 keV energy band, potentially associated with the {sup 44}Ti line emission, is found with a marginal significance level of ?2.6?. The corresponding 3? upper limit on the {sup 44}Ti line flux amounts to 1.5 10{sup 5} photon cm{sup 2} s{sup 1}. Implications on the progenitor of the Tycho SN, considered to be a Type Ia SN prototype, are discussed.

  19. FIRST SIMULTANEOUS DETECTION OF MOVING MAGNETIC FEATURES IN PHOTOSPHERIC INTENSITY AND MAGNETIC FIELD DATA

    SciTech Connect (OSTI)

    Lim, Eun-Kyung; Yurchyshyn, Vasyl; Goode, Philip

    2012-07-01

    The formation and the temporal evolution of a bipolar moving magnetic feature (MMF) was studied with high-spatial and temporal resolution. The photometric properties were observed with the New Solar Telescope at Big Bear Solar Observatory using a broadband TiO filter (705.7 nm), while the magnetic field was analyzed using the spectropolarimetric data obtained by Hinode. For the first time, we observed a bipolar MMF simultaneously in intensity images and magnetic field data, and studied the details of its structure. The vector magnetic field and the Doppler velocity of the MMF were also studied. A bipolar MMF with its positive polarity closer to the negative penumbra formed, accompanied by a bright, filamentary structure in the TiO data connecting the MMF and a dark penumbral filament. A fast downflow ({<=}2 km s{sup -1}) was detected at the positive polarity. The vector magnetic field obtained from the full Stokes inversion revealed that a bipolar MMF has a U-shaped magnetic field configuration. Our observations provide a clear intensity counterpart of the observed MMF in the photosphere, and strong evidence of the connection between the MMF and the penumbral filament as a serpentine field.

  20. Specific features of defect and mass transport in concentrated fcc alloys

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Osetsky, Yuri N.; Béland, Laurent K.; Stoller, Roger E.

    2016-06-15

    We report that diffusion and mass transport are basic properties that control materials performance, such as phase stability, solute decomposition and radiation tolerance. While understanding diffusion in dilute alloys is a mature field, concentrated alloys are much less studied. Here, atomic-scale diffusion and mass transport via vacancies and interstitial atoms are compared in fcc Ni, Fe and equiatomic Ni-Fe alloy. High temperature properties were determined using conventional molecular dynamics on the microsecond timescale, whereas the kinetic activation-relaxation (k-ART) approach was applied at low temperatures. The k-ART was also used to calculate transition states in the alloy and defect transport coefficients.more » The calculations reveal several specific features. For example, vacancy and interstitial defects migrate via different alloy components, diffusion is more sluggish in the alloy and, notably, mass transport in the concentrated alloy cannot be predicted on the basis of diffusion in its pure metal counterparts. Lastly, the percolation threshold for the defect diffusion in the alloy is discussed and it is suggested that this phenomenon depends on the properties and diffusion mechanisms of specific defects.« less

  1. A smooth landscape: ending saddle point inflation requires features to be shallow

    SciTech Connect (OSTI)

    Battefeld, Diana; Battefeld, Thorsten E-mail: tbattefe@astro.physik.uni-goettingen.de

    2013-07-01

    We consider inflation driven near a saddle point in a higher dimensional field space, which is the most likely type of slow roll inflation on the string theoretical landscape; anthropic arguments need to be invoked in order to find a sufficiently flat region. To give all inflatons large masses after inflation and yield a small but positive cosmological constant, the trajectory in field space needs to terminate in a hole on the inflationary plateau, introducing a curved end-of-inflation hypersurface. We compute non-Gaussianities (bi- and tri-spectrum) caused by this curved hyper-surface and find a negative, potentially large, local non-linearity parameter. To be consistent with current observational bounds, the hole needs to be shallow, i.e. considerably wider than deep in natural units. To avoid singling out our vacuum as special (i.e. more special than a positive cosmological constant entails), we deduce that all features on field space should be similarly shallow, severely limiting the type of landscapes one may use for inflationary model building. We justify the use of a truncated Fourier series with random coefficients, which are suppressed the higher the frequency, to model such a smooth landscape by a random potential, as is often done in the literature without a good a priory reason.

  2. Potentially disruptive hydrologic features, events and processes at the Yucca Mountain Site, Nevada

    SciTech Connect (OSTI)

    Hoxie, D.T.

    1995-04-01

    Yucca Mountain, Nevada, has been selected by the United States to be evaluated as a potential site for the development of a geologic repository for the disposal of spent nuclear fuel and high-level radioactive waste. If the site is determined to be suitable for repository development and construction is authorized, the repository at the Yucca Mountain site is planned to be constructed in unsaturated tuff at a depth of about 250 meters below land surface and at a distance of about 250 meters above the water table. The intent of locating a repository in a thick unsaturated-zone geohydrologic setting, such as occurs at Yucca Mountain under the arid to semi-arid climatic conditions that currently prevail in the region, is to provide a natural setting for the repository system in which little ground water will be available to contact emplaced waste or to transport radioactive material from the repository to the biosphere. In principle, an unsaturated-zone repository will be vulnerable to water entry from both above and below. Consequently, a major effort within the site-characterization program at the Yucca Mountain site is concerned with identifying and evaluating those features, events, and processes, such as increased net infiltration or water-table rise, whose presence or future occurrence could introduce water into a potential repository at the site in quantities sufficient to compromise the waste-isolation capability of the repository system.

  3. Emission features and expansion dynamics of nanosecond laser ablation plumes at different ambient pressures

    SciTech Connect (OSTI)

    Farid, N.; Harilal, S. S. Hassanein, A.; Ding, H.

    2014-01-21

    The influence of ambient pressure on the spectral emission features and expansion dynamics of a plasma plume generated on a metal target has been investigated. The plasma plumes were generated by irradiating Cu targets using 6?ns, 1064?nm pulses from a Q-switched Nd:YAG laser. The emission and expansion dynamics of the plasma plumes were studied by varying air ambient pressure levels ranging from vacuum to atmospheric pressure. The ambient pressure levels were found to affect both the line intensities and broadening along with the signal to background and signal to noise ratios and the optimum pressure conditions for analytical applications were evaluated. The characteristic plume parameters were estimated using emission spectroscopy means and noticed that the excitation temperature peaked ?300?Torr, while the electron density showed a maximum ?100?Torr. Fast-gated images showed a complex interaction between the plume and background air leading to changes in the plume geometry with pressure as well as time. Surface morphology of irradiated surface showed that the pressure of the ambient gas affects the laser-target coupling significantly.

  4. Land cover classification in multispectral imagery using clustering of sparse approximations over learned feature dictionaries

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Moody, Daniela I.; Brumby, Steven P.; Rowland, Joel C.; Altmann, Garrett L.

    2014-12-09

    We present results from an ongoing effort to extend neuromimetic machine vision algorithms to multispectral data using adaptive signal processing combined with compressive sensing and machine learning techniques. Our goal is to develop a robust classification methodology that will allow for automated discretization of the landscape into distinct units based on attributes such as vegetation, surface hydrological properties, and topographic/geomorphic characteristics. We use a Hebbian learning rule to build spectral-textural dictionaries that are tailored for classification. We learn our dictionaries from millions of overlapping multispectral image patches and then use a pursuit search to generate classification features. Land cover labelsmore » are automatically generated using unsupervised clustering of sparse approximations (CoSA). We demonstrate our method on multispectral WorldView-2 data from a coastal plain ecosystem in Barrow, Alaska. We explore learning from both raw multispectral imagery and normalized band difference indices. We explore a quantitative metric to evaluate the spectral properties of the clusters in order to potentially aid in assigning land cover categories to the cluster labels. In this study, our results suggest CoSA is a promising approach to unsupervised land cover classification in high-resolution satellite imagery.« less

  5. Polarization controlled deep sub-wavelength periodic features written by femtosecond laser on nanodiamond thin film surface

    SciTech Connect (OSTI)

    Kumar Kuntumalla, Mohan; Srikanth, Vadali V. S. S.; Rajamudili, Kuladeep; Rao Desai, Narayana

    2014-04-21

    Deep sub-wavelength (Λ/λ = ∼0.22) periodic features are induced uniformly on a nanodiamond (ND) thin film surface using femtosecond (fs) laser irradiation (pulse duration = ∼110 fs and central wavelength of ∼800 nm). The topography of the surface features is controlled by the laser polarization. Orientation of features is perpendicular to laser polarization. Periodicity (spatial periodicity of < λ/4) of the surface features is less than the laser wavelength. This work gives an experimental proof of polarization controlled surface plasmon-fs laser coupling mechanism prompting the interaction between fs laser and solid matter (here ND thin film) which in turn is resulting in the periodic surface features. Scanning electron microscopy in conjunction with micro Raman scattering, X-ray diffraction, and atomic force microscopy are carried out to extract surface morphology and phase information of the laser irradiated regions. This work demonstrates an easy and efficient surface fabrication technique.

  6. System and method employing a minimum distance and a load feature database to identify electric load types of different electric loads

    DOE Patents [OSTI]

    Lu, Bin; Yang, Yi; Sharma, Santosh K; Zambare, Prachi; Madane, Mayura A

    2014-12-23

    A method identifies electric load types of a plurality of different electric loads. The method includes providing a load feature database of a plurality of different electric load types, each of the different electric load types including a first load feature vector having at least four different load features; sensing a voltage signal and a current signal for each of the different electric loads; determining a second load feature vector comprising at least four different load features from the sensed voltage signal and the sensed current signal for a corresponding one of the different electric loads; and identifying by a processor one of the different electric load types by determining a minimum distance of the second load feature vector to the first load feature vector of the different electric load types of the load feature database.

  7. keV sterile neutrino dark matter from singlet scalar decays: basic concepts and subtle features

    SciTech Connect (OSTI)

    Merle, Alexander; Totzauer, Maximilian

    2015-06-08

    We perform a detailed and illustrative study of the production of keV sterile neutrino Dark Matter (DM) by decays of singlet scalars in the early Universe. In the current study we focus on providing a clear and general overview of this production mechanism. For the first time we study all regimes possible on the level of momentum distribution functions, which we obtain by solving a system of Boltzmann equations. These quantities contain the full information about the production process, which allows us to not only track the evolution of the DM generation but to also take into account all bounds related to the spectrum, such as constraints from structure formation or from avoiding too much dark radiation. In particular we show that this simple production mechanism can, depending on the regime, lead to strongly non-thermal DM spectra which may even feature more than one peak in the momentum distribution. These cases could have particularly interesting consequences for cosmological structure formation, as their analysis requires more refined tools than the simplistic estimate using the free-streaming horizon. Here we present the mechanism including all concepts and subtleties involved, for now using the assumption that the effective number of relativistic degrees of freedom is constant during DM production, which is applicable in a significant fraction of the parameter space. This allows us to derive analytical results to back up our detailed numerical computations, thus leading to the most comprehensive picture of keV sterile neutrino DM production by singlet scalar decays that exists up to now.

  8. Thermodynamic Features of Benzene-1,2-Diphosphonic Acid Complexes with Several Metal Ions

    SciTech Connect (OSTI)

    Syouhei Nishihama; Ryan P. Witty; Leigh R Martin; Kenneth L. Nash

    2013-08-01

    Among his many contributions to the advancement of f-element chemistry and separation science, Professor Gregory R. Choppins research group completed numerous investigations featuring the application of distribution techniques to the determination of metal complexation equilibrium quotients. Most of these studies focused on the chemistry of lanthanide and actinide complexes. In keeping with that tradition, this report discusses the complex formation equilibrium constants for complexes of trivalent europium (Eu3+) with benzene-1,2-diphosphonic acid (H4BzDP) determined using solvent extraction distribution experiments in 0.2 M (Na,H)ClO4 media in the temperature range of 5 45 degrees C. Protonation constants for HnBzDP4-n and stoichiometry and stability of BzDP4- complexes with Zn2+, Ni2+, and Cu2+ have also been determined using potentiometric titration (at I = 0.1 M) and 31P NMR spectroscopy. Heats of protonation of HnBzDPn-4 species have been determined by titration calorimetry. From the temperature dependence of the complex Eu3+-HnBzDPn-4 equilibrium constant, a composite enthalpy (?H = -15.1 (+/-1.0) kJ mol-1) of complexation has been computed. Comparing these thermodynamic parameters with literature reports on other diphosphonic acids and structurally similar carboxylic acids indicates that exothermic heats of complexation are unique to the Eu-BzDP system. Comparisons with thermodynamic data from the literature indicate that the fixed geometry imposed by the benzene ring enhances complex stability.

  9. Evaluation of Features, Events, and Processes (FEP) for the Biosphere Model

    SciTech Connect (OSTI)

    M. Wasiolek; P. Rogers

    2004-10-27

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of biosphere features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for the license application (LA). A screening decision, either ''Included'' or ''Excluded'', is given for each FEP along with the corresponding technical basis for the excluded FEPs and the descriptions of how the included FEPs were incorporated in the biosphere model. This information is required by the U.S. Nuclear Regulatory Commission (NRC) regulations at 10 CFR 63.114 (d, e, and f) [DIRS 156605]. The FEPs addressed in this report concern characteristics of the reference biosphere, the receptor, and the environmental transport and receptor exposure pathways for the groundwater and volcanic ash exposure scenarios considered in biosphere modeling. This revision provides the summary of the implementation of included FEPs in TSPA-LA, (i.e., how the FEP is included); for excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report is one of the 10 documents constituting the biosphere model documentation suite. A graphical representation of the documentation hierarchy for the biosphere model is presented in Figure 1-1. This figure shows the interrelationships among the products (i.e., analysis and model reports) developed for biosphere modeling. The ''Biosphere Model Report'' describes in detail the biosphere conceptual model and mathematical model. The input parameter reports shown to the right of the ''Biosphere Model Report'' contain detailed descriptions of the model input parameters and their development. Outputs from these six reports are used in the ''Nominal Performance Biosphere Dose Conversion Factor Analysis and Disruptive Event Biosphere Dose Conversion Factor Analysis'' to generate the biosphere dose conversion factors (BDCFs), which are input parameters for

  10. A Full-Featured User Friendly CO{sub 2}-EOR and Sequestration Planning Software

    SciTech Connect (OSTI)

    Savage, Bill

    2013-11-30

    A Full-Featured, User Friendly CO{sub 2}-EOR and Sequestration Planning Software This project addressed the development of an integrated software solution that includes a graphical user interface, numerical simulation, visualization tools and optimization processes for reservoir simulation modeling of CO{sub 2}-EOR. The objective was to assist the industry in the development of domestic energy resources by expanding the application of CO{sub 2}-EOR technologies, and ultimately to maximize the CO{sub 2} sequestration capacity of the U.S. The software resulted in a field-ready application for the industry to address the current CO{sub 2}-EOR technologies. The software has been made available to the public without restrictions and with user friendly operating documentation and tutorials. The software (executable only) can be downloaded from NITEC’s website at www.nitecllc.com. This integrated solution enables the design, optimization and operation of CO{sub 2}-EOR processes for small and mid-sized operators, who currently cannot afford the expensive, time intensive solutions that the major oil companies enjoy. Based on one estimate, small oil fields comprise 30% of the of total economic resource potential for the application of CO{sub 2}-EOR processes in the U.S. This corresponds to 21.7 billion barrels of incremental, technically recoverable oil using the current “best practices”, and 31.9 billion barrels using “next-generation” CO{sub 2}-EOR techniques. The project included a Case Study of a prospective CO{sub 2}-EOR candidate field in Wyoming by a small independent, Linc Energy Petroleum Wyoming, Inc. NITEC LLC has an established track record of developing innovative and user friendly software. The Principle Investigator is an experienced manager and engineer with expertise in software development, numerical techniques, and GUI applications. Unique, presently-proprietary NITEC technologies have been integrated into this application to further its ease of

  11. NUMERICAL SIMULATIONS OF CHROMOSPHERIC ANEMONE JETS ASSOCIATED WITH MOVING MAGNETIC FEATURES

    SciTech Connect (OSTI)

    Yang, Liping; He, Jiansen; Tu, Chuanyi; Zhang, Lei; Peter, Hardi; Feng, Xueshang; Zhang, Shaohua

    2013-11-01

    Observations with the space-based solar observatory Hinode show that small-scale magnetic structures in the photosphere are found to be associated with a particular class of jets of plasma in the chromosphere called anemone jets. The goal of our study is to conduct a numerical experiment of such chromospheric anemone jets related to the moving magnetic features (MMFs). We construct a 2.5 dimensional numerical MHD model to describe the process of magnetic reconnection between the MMFs and the pre-existing ambient magnetic field, which is driven by the horizontal motion of the magnetic structure in the photosphere. We include thermal conduction parallel to the magnetic field and optically thin radiative losses in the corona to account for a self-consistent description of the evaporation process during the heating of the plasma due to the reconnection process. The motion of the MMFs leads to the expected jet and our numerical results can reproduce many observed characteristics of chromospheric anemone jets, topologically and quantitatively. As a result of the tearing instability, plasmoids are generated in the reconnection process that are consistent with the observed bright moving blobs in the anemone jets. An increase in the thermal pressure at the base of the jet is also driven by the reconnection, which induces a train of slow-mode shocks propagating upward. These shocks are a secondary effect, and only modulate the outflow of the anemone jet. The jet itself is driven by the energy input due to the reconnection of the MMFs and the ambient magnetic field.

  12. A new feature in the internal heavy isotope distribution in ozone

    SciTech Connect (OSTI)

    Bhattacharya, S. K. Liang, Mao-Chang; Savarino, Joel; Michalski, G.

    2014-10-07

    Ozone produced by discharge or photolysis of oxygen has unusually heavy isotopic composition ({sup 18}O/{sup 16}O and {sup 17}O/{sup 16}O ratio) which does not follow normal mass fractionation rule: δ{sup 17}O ∼ 0.52{sup *}δ{sup 18}O, expressed as an anomaly Δ{sup 17}O = δ{sup 17}O − 0.52{sup *}δ{sup 18}O. Ozone molecule being an open isosceles triangle can have the heavy isotope located either in its apex or symmetric (s) position or the base or asymmetric (as) position. Correspondingly, one can define positional isotopic enrichment, written as δ{sup 18}O (s) or δ{sup 18}O (as) (and similarly for δ{sup 17}O) as well as position dependent isotope anomaly Δ{sup 17}O (s) and Δ{sup 17}O (as). Marcus and co-workers have proposed a semi-empirical model based in principle on the RRKM model of uni-molecular dissociation but with slight modification (departure from statistical randomness assumption for symmetrical molecules) which explains many features of ozone isotopic enrichment. This model predicts that the bulk isotope anomaly is contained wholly in the asymmetric position and the Δ{sup 17}O (s) is zero. Consequently, Δ{sup 17}O (as) = 1.5 {sup *} Δ{sup 17}O (bulk) (named here simply as the “1.5 rule”) which has been experimentally confirmed over a range of isotopic enrichment. We now show that a critical re-analysis of the earlier experimental data demonstrates a small but significant departure from this 1.5 rule at the highest and lowest levels of enrichments. This departure provides the first experimental proof that the dynamics of ozone formation differs from a statistical model constrained only by restriction of symmetry. We speculate over some possible causes for the departure.

  13. Final report: Task 4a.2 20% wind scenario assessment of electric grid operational features

    SciTech Connect (OSTI)

    Toole, Gasper L.

    2009-01-01

    Wind integration modeling in electricity generation capacity expansion models is important in that these models are often used to inform political or managerial decisions. Poor representation of wind technology leads to under-estimation of wind's contribution to future energy scenarios which may hamper growth of the industry. The NREL's Wind Energy Deployment System (WinDS) model provides the most detailed representation of geographically disperse renewable resources and the optimization of transmission expansion to access these resources. Because WinDS was selected as the primary modeling tool for the 20% Wind Energy by 2030 study, it is the ideal tool for supplemental studies of the transmission expansion results. However, as the wind industry grows and knowledge related to the wind resource and integration of wind energy into the electric system develops, the WinDS model must be continually improved through additional data and innovative algorithms to capture the primary effects of variable wind generation. The detailed representation of wind technology in the WinDS model can be used to provide improvements to the simplified representation of wind technology in other capacity expansion models. This task did not employ the WinDS model, but builds from it and its results. Task 4a.2 provides an assessment of the electric grid operational features of the 20% Wind scenario and was conducted using power flow models accepted by the utility industry. Tasks 2 provides information regarding the physical flow of electricity on the electric grid which is a critical aspect of infrastructure expansion scenarios. Expanding transmission infrastructure to access remote wind resource in a physically realizable way is essential to achieving 20% wind energy by 2030.

  14. MULTI-DIMENSIONAL FEATURES OF NEUTRINO TRANSFER IN CORE-COLLAPSE SUPERNOVAE

    SciTech Connect (OSTI)

    Sumiyoshi, K. [Numazu College of Technology, Ooka 3600, Numazu, Shizuoka 410-8501 (Japan); Takiwaki, T. [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Matsufuru, H. [Computing Research Center, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Yamada, S., E-mail: sumi@numazu-ct.ac.jp, E-mail: takiwaki.tomoya@nao.ac.jp, E-mail: hideo.matsufuru@kek.jp, E-mail: shoichi@heap.phys.waseda.ac.jp [Science and Engineering and Advanced Research Institute for Science and Engineering, Waseda University, Okubo, 3-4-1, Shinjuku, Tokyo 169-8555 (Japan)

    2015-01-01

    We study the multi-dimensional properties of neutrino transfer inside supernova cores by solving the Boltzmann equations for neutrino distribution functions in genuinely six-dimensional phase space. Adopting representative snapshots of the post-bounce core from other supernova simulations in three dimensions, we solve the temporal evolution to stationary states of neutrino distribution functions using our Boltzmann solver. Taking advantage of the multi-angle and multi-energy feature realized by the S {sub n} method in our code, we reveal the genuine characteristics of spatially three-dimensional neutrino transfer, such as nonradial fluxes and nondiagonal Eddington tensors. In addition, we assess the ray-by-ray approximation, turning off the lateral-transport terms in our code. We demonstrate that the ray-by-ray approximation tends to propagate fluctuations in thermodynamical states around the neutrino sphere along each radial ray and overestimate the variations between the neutrino distributions on different radial rays. We find that the difference in the densities and fluxes of neutrinos between the ray-by-ray approximation and the full Boltzmann transport becomes ?20%, which is also the case for the local heating rate, whereas the volume-integrated heating rate in the Boltzmann transport is found to be only slightly larger (?2%) than the counterpart in the ray-by-ray approximation due to cancellation among different rays. These results suggest that we should carefully assess the possible influences of various approximations in the neutrino transfer employed in current simulations of supernova dynamics. Detailed information on the angle and energy moments of neutrino distribution functions will be profitable for the future development of numerical methods in neutrino-radiation hydrodynamics.

  15. THE SPITZER INFRARED SPECTROGRAPH DEBRIS DISK CATALOG. II. SILICATE FEATURE ANALYSIS OF UNRESOLVED TARGETS

    SciTech Connect (OSTI)

    Mittal, Tushar; Chen, Christine H.; Jang-Condell, Hannah; Manoj, P.; Sargent, Benjamin A.; Watson, Dan M.; Lisse, Carey M.

    2015-01-10

    During the Spitzer Space Telescope cryogenic mission, astronomers obtained Infrared Spectrograph (IRS) observations of hundreds of debris disk candidates that have been compiled in the Spitzer IRS Debris Disk Catalog. We have discovered 10 and/or 20 μm silicate emission features toward 120 targets in the catalog and modeled the IRS spectra of these sources, consistent with MIPS 70 μm observations, assuming that the grains are composed of silicates (olivine, pyroxene, forsterite, and enstatite) and are located either in a continuous disk with power-law size and surface density distributions or thin rings that are well-characterized using two separate dust grain temperatures. For systems better fit by the continuous disk model, we find that (1) the dust size distribution power-law index is consistent with that expected from a collisional cascade, q = 3.5-4.0, with a large number of values outside this range, and (2) the minimum grain size, a {sub min}, increases with stellar luminosity, L {sub *}, but the dependence of a {sub min} on L {sub *} is weaker than expected from radiation pressure alone. In addition, we also find that (3) the crystalline fraction of dust in debris disks evolves as a function of time with a large dispersion in crystalline fractions for stars of any particular stellar age or mass, (4) the disk inner edge is correlated with host star mass, and (5) there exists substantial variation in the properties of coeval disks in Sco-Cen, indicating that the observed variation is probably due to stochasticity and diversity in planet formation.

  16. Characterizing ultraviolet and infrared observational properties for galaxies. II. Features of attenuation law

    SciTech Connect (OSTI)

    Mao, Ye-Wei; Kong, Xu; Lin, Lin E-mail: xkong@ustc.edu.cn

    2014-07-01

    Variations in the attenuation law have a significant impact on observed spectral energy distributions for galaxies. As one important observational property for galaxies at ultraviolet and infrared wavelength bands, the correlation between infrared-to-ultraviolet luminosity ratio and ultraviolet color index (or ultraviolet spectral slope), i.e., the IRX-UV relation (or IRX-β relation), offered a widely used formula for correcting dust attenuation in galaxies, but the usability appears to be in doubt now because of considerable dispersion in this relation found by many studies. In this paper, on the basis of spectral synthesis modeling and spatially resolved measurements of four nearby spiral galaxies, we provide an interpretation of the deviation in the IRX-UV relation with variations in the attenuation law. From both theoretical and observational viewpoints, two components in the attenuation curve, the linear background and the 2175 Å bump, are suggested to be the parameters in addition to the stellar population age (addressed in the first paper of this series) in the IRX-UV function; different features in the attenuation curve are diagnosed for the galaxies in our sample. Nevertheless, it is often difficult to ascertain the attenuation law for galaxies in actual observations. Possible reasons for preventing the successful detection of the parameters in the attenuation curve are also discussed in this paper, including the degeneracy of the linear background and the 2175 Å bump in observational channels, the requirement for young and dust-rich systems to study, and the difficulty in accurate estimates of dust attenuations at different wavelength bands.

  17. Polyacrylamide-hydroxyapatite composite: Preparation, characterization and adsorptive features for uranium and thorium

    SciTech Connect (OSTI)

    Baybas, Demet; Ulusoy, Ulvi

    2012-10-15

    The composite of synthetically produced hydroxyapatite (HAP) and polyacrylamide was prepared (PAAm-HAP) and characterized by BET, FT-IR, TGA, XRD, SEM and PZC analysis. The adsorptive features of HAP and PAAm-HAP were compared for UO{sub 2}{sup 2+} and Th{sup 4+}. The entrapment of HAP into PAAm-HAP did not change the structure of HAP. Both structures had high affinity to the studied ions. The adsorption capacity of PAAm-HAP was than that of HAP. The adsorption dependence on pH and ionic intensity provided supportive evidences for the effect of complex formation on adsorption process. The adsorption kinetics was well compatible to pseudo second order model. The values of enthalpy and entropy changes were positive. Th{sup 4+} adsorption from the leachate obtained from a regional fluorite rock confirmed the selectivity of PAAm-HAP for this ion. In consequence, PAAm-HAP should be considered amongst favorite adsorbents for especially deposition of nuclear waste containing U and Th, and radionuclide at secular equilibrium with these elements. - Graphical abstract: SEM images of hydroxyapatite (HAP) and polyacrylamide-hydroxyapatite (PAAm-HAP), and the adsorption isotherms for Uranium and Thorium. Highlights: Black-Right-Pointing-Pointer Composite of PAAm-HAP was synthesized from hydroxyapatite and polyacrylamide. Black-Right-Pointing-Pointer The materials were characterized by BET, FT-IR, XRD, SEM, TGA and PZC analysis. Black-Right-Pointing-Pointer HAP and PAAm-HAP had high sorption capacity and very rapid uptake for UO{sub 2}{sup 2+} and Th{sup 4+}. Black-Right-Pointing-Pointer Super porous PAAm was obtained from PAAm-HAP after its removal of HAP content. Black-Right-Pointing-Pointer The composite is potential for deposition of U, Th and its associate radionuclides.

  18. UNIQUE FEATURES IN MAGNET DESIGNS FOR R AND D ENERGY RECOVERY LINAC AT BNL.

    SciTech Connect (OSTI)

    MENG,W.; JAIN, A.; GANETIS, G.; KAYRAN, D.; LITVINENKO, V.N.; LONGO, C.; MAHLER, G.; POZDEYEV, E.; TUOZZOLO, J.

    2007-06-25

    In this paper we describe the unique features and analysis techniques used on the magnets for a R&D Energy Recovery Linac (ERL) [1] under construction at the Collider Accelerator Department at BNL. The R&D ERL serves as a test-bed for future BNL ERLs, such as an electron-cooler-ERL at RHIC [2] and a future 20 GeV ERL electron-hadron at eRHIC [3]. Here we present select designs of various dipole and quadruple magnets which are used in Z-bend merging systems [4] and the returning loop, 3-D simulations of the fields in aforementioned magnets, particle tracking analysis, and the magnet's influence on beam parameters. We discuss an unconventional method of setting requirements on the quality of magnetic field and transferring them into measurable parameters as well as into manufacturing tolerances. We compare selected simulation with results of magnetic measurements. A 20 MeV R&D ERL (Fig. 1) is in an advanced phase of construction at the Collider-Accelerator Department at BNL, with commissioning planned for early 2009. In the R&D ERL, an electron beam is generated in a 2 MeV superconducting RF photo-gun, next is accelerated to 20 MeV in a 5 cell SRF linac, subsequently passed through a return loop, then decelerated to 2 MeV in the SRF linac, and finally is sent to a beam dump. The lattice of the R&D ERL is designed with a large degree of flexibility to enable the covering of a vast operational parameter space: from non-achromatic lattices to achromatic with positive, zero and negative R56 parameter. It also allows for large range tunability of Rlz and lattice RS4 parameters (which are important for transverse beam-break-up instability). Further details of the R&D ERL can be found elsewhere in these proceedings [5]. The return loop magnets are of traditional design with the following exceptions: (a) The bending radius of the 60{sup o} dipole magnets is 20 cm, which is rather small. We use 15{sup o} edges on both sides of the dipoles to split very strong focusing evenly

  19. SunShot Summit to be Featured in May 7th #SolarChat | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    to be Featured in May 7th #SolarChat SunShot Summit to be Featured in May 7th #SolarChat March 28, 2014 - 2:39pm Addthis Did you know that more than half of all solar cell efficiency records have been directly funded by the U.S. Department of Energy (DOE)? Only three years into the Department's decade-long SunShot Initiative, the solar industry is already more than 60% of the way to achieving SunShot's aggressive cost targets -$0.06 per kilowatt hour (kWh) for utility-scale PV solar electricity

  20. Design Review Report for formal review of safety class features of exhauster system for rotary mode core sampling

    SciTech Connect (OSTI)

    JANICEK, G.P.

    2000-06-08

    Report documenting Formal Design Review conducted on portable exhausters used to support rotary mode core sampling of Hanford underground radioactive waste tanks with focus on Safety Class design features and control requirements for flammable gas environment operation and air discharge permitting compliance.

  1. Accounting for a feature of the configuration of the loops in the primary circuit of VVER-440 reactors

    SciTech Connect (OSTI)

    Khazanov, A. L.

    2013-09-15

    A feature of the configuration of the loops of the primary circuit of VVER-440 reactors and its influence on the characteristics of the main circulation pumps are analyzed. It is proposed that differences in the characteristics of the main reactor circulation pumps be taken account during the design and operation of nuclear power plants.

  2. Prognostic Value and Reproducibility of Pretreatment CT Texture Features in Stage III Non-Small Cell Lung Cancer

    SciTech Connect (OSTI)

    Fried, David V.; Tucker, Susan L.; Zhou, Shouhao; Liao, Zhongxing; Mawlawi, Osama; Ibbott, Geoffrey; Court, Laurence E.

    2014-11-15

    Purpose: To determine whether pretreatment CT texture features can improve patient risk stratification beyond conventional prognostic factors (CPFs) in stage III non-small cell lung cancer (NSCLC). Methods and Materials: We retrospectively reviewed 91 cases with stage III NSCLC treated with definitive chemoradiation therapy. All patients underwent pretreatment diagnostic contrast enhanced computed tomography (CE-CT) followed by 4-dimensional CT (4D-CT) for treatment simulation. We used the average-CT and expiratory (T50-CT) images from the 4D-CT along with the CE-CT for texture extraction. Histogram, gradient, co-occurrence, gray tone difference, and filtration-based techniques were used for texture feature extraction. Penalized Cox regression implementing cross-validation was used for covariate selection and modeling. Models incorporating texture features from the 33 image types and CPFs were compared to those with models incorporating CPFs alone for overall survival (OS), local-regional control (LRC), and freedom from distant metastases (FFDM). Predictive Kaplan-Meier curves were generated using leave-one-out cross-validation. Patients were stratified based on whether their predicted outcome was above or below the median. Reproducibility of texture features was evaluated using test-retest scans from independent patients and quantified using concordance correlation coefficients (CCC). We compared models incorporating the reproducibility seen on test-retest scans to our original models and determined the classification reproducibility. Results: Models incorporating both texture features and CPFs demonstrated a significant improvement in risk stratification compared to models using CPFs alone for OS (P=.046), LRC (P=.01), and FFDM (P=.005). The average CCCs were 0.89, 0.91, and 0.67 for texture features extracted from the average-CT, T50-CT, and CE-CT, respectively. Incorporating reproducibility within our models yielded 80.4% (±3.7% SD), 78.3% (±4.0% SD), and 78

  3. On the Putative Detection of Z>0 X-Ray Absorption Features in the Spectrum of Mrk 421

    SciTech Connect (OSTI)

    Rasmussen, Andrew P.; Kahn, Steven M.; Paerels, Frits; Herder, Jan Willem den; Kaastra, Jelle; de Vries, Cor; /SRON, Utrecht

    2006-04-28

    In a series of papers, Nicastro et al. have claimed the detection of z > 0 O VII absorption features in the spectrum of Mrk 421 obtained with the Chandra Low Energy Transmission Grating Spectrometer (LETGS). We evaluate those claims in the context of a high quality spectrum of the same source obtained with the Reflection Grating Spectrometer (RGS) on XMM-Newton. The data comprise over 955 ksec of usable exposure time and more than 2.6 x 10{sup 4} counts per 50 m{angstrom} at 21.6 {angstrom}. We concentrate on the spectrally clean region (21.3 < {lambda} < 22.5 {angstrom}) where sharp features due to the astrophysically abundant O VII may reveal an intervening, warm-hot intergalactic medium (WHIM). In spite of the fact that the sensitivity of the RGS data is higher than that of the original LETGS data presented by Nicastro et al., we do not confirm detection of any of the intervening systems claimed to date. Rather, we detect only three unsurprising, astrophysically expected features down to the log (N{sub i}) {approx} 14.6 (3{sigma}) sensitivity level. Each of the two purported WHIM features is rejected with a statistical confidence that exceeds that reported for its initial detection. While we can not rule out the existence of fainter, WHIM related features in these spectra, we suggest that previous discovery claims were premature. A more recent paper by Williams et al. claims to have demonstrated that the RGS data we analyze here do not have the resolution or statistical quality required to confirm or deny the LETGS detections. We show that the Williams et al. reduction of the RGS data was highly flawed, leading to an artificial and spurious degradation of the instrument response. We carefully highlight the differences between our analysis presented here and those published by Williams et al.

  4. EFRC News & Events

    Office of Science (SC) Website

    nanotechnology, EFRC researchers fashion a new kind of transparent electrode for flat-panel displays. This work, featured in the Office of Sciences

  5. SU-E-J-252: Reproducibility of Radiogenomic Image Features: Comparison of Two Semi-Automated Segmentation Methods

    SciTech Connect (OSTI)

    Lee, M; Woo, B; Kim, J; Jamshidi, N; Kuo, M

    2015-06-15

    Purpose: Objective and reliable quantification of imaging phenotype is an essential part of radiogenomic studies. We compared the reproducibility of two semi-automatic segmentation methods for quantitative image phenotyping in magnetic resonance imaging (MRI) of glioblastoma multiforme (GBM). Methods: MRI examinations with T1 post-gadolinium and FLAIR sequences of 10 GBM patients were downloaded from the Cancer Image Archive site. Two semi-automatic segmentation tools with different algorithms (deformable model and grow cut method) were used to segment contrast enhancement, necrosis and edema regions by two independent observers. A total of 21 imaging features consisting of area and edge groups were extracted automatically from the segmented tumor. The inter-observer variability and coefficient of variation (COV) were calculated to evaluate the reproducibility. Results: Inter-observer correlations and coefficient of variation of imaging features with the deformable model ranged from 0.953 to 0.999 and 2.1% to 9.2%, respectively, and the grow cut method ranged from 0.799 to 0.976 and 3.5% to 26.6%, respectively. Coefficient of variation for especially important features which were previously reported as predictive of patient survival were: 3.4% with deformable model and 7.4% with grow cut method for the proportion of contrast enhanced tumor region; 5.5% with deformable model and 25.7% with grow cut method for the proportion of necrosis; and 2.1% with deformable model and 4.4% with grow cut method for edge sharpness of tumor on CE-T1W1. Conclusion: Comparison of two semi-automated tumor segmentation techniques shows reliable image feature extraction for radiogenomic analysis of GBM patients with multiparametric Brain MRI.

  6. Spectral inversion of the H? line for a plasma feature in the upper chromosphere of the quiet sun

    SciTech Connect (OSTI)

    Chae, Jongchul

    2014-01-01

    We propose a generalization of Becker's cloud model (BCM): an embedded cloud model (ECM)for the inversion of the core of the H? line spectrum of a plasma feature either lying high above the forest of chromospheric features or partly embedded in the outermost part of this forest. The fundamental assumption of the ECM is that the background light incident on the bottom of the feature from below is equal to the ensemble-average light at the same height. This light is related to the observed ensemble-average light via the radiative transfer that is described by the four parameters newly introduced in addition to the original four parameters of the BCM. Three of these new parameters are independently determined from the observed rms contrast profile of the ensemble. We use the constrained ?{sup 2} fitting technique to determine the five free parameters. We find that the ECM leads to the fairly good fitting of the observed line profiles and the reasonable inference of physical parameters in quiet regions where the BCM cannot. Our first application of this model to a quiet region of the Sun indicates that the model can produce the complete velocity map and Doppler width map of the region.

  7. Policy Flash 2013-29 Leveraging the General Services Administrations SmartPay2 Program and its Single Use Account Feature

    Broader source: Energy.gov [DOE]

    Attached is Policy Flash 2013-29: Leveraging the General Services Administrations SmartPay2 Program and its Single Use Account Feature

  8. [Fe II] 1.64 μm IMAGING OBSERVATIONS OF THE OUTFLOW FEATURES AROUND ULTRACOMPACT H II REGIONS IN THE FIRST GALACTIC QUADRANT

    SciTech Connect (OSTI)

    Shinn, Jong-Ho; Kim, Kee-Tae; Lee, Jae-Joon; Kyeong, Jaemann; Hwang, Narae; Park, Byeong-Gon; Lee, Yong-Hyun; Kim, Hyun-Jeong; Koo, Bon-Chul; Pyo, Tae-Soo

    2014-09-01

    We present [Fe II] 1.644 μm features around ultracompact H II regions (UCHIIs) found on a quest for the ''footprint'' outflow features of UCHIIs—the features produced by outflowing materials ejected during an earlier, active accretion phase of massive young stellar objects (MYSOs). We surveyed 237 UCHIIs in the first Galactic quadrant, employing the CORNISH UCHII catalog and UWIFE data, which is an imaging survey in [Fe II] 1.644 μm performed with UKIRT-WFCAM under ∼0.''8 seeing conditions. The [Fe II] features were found around five UCHIIs, one of which was less plausible. We interpret the [Fe II] features to be shock-excited by outflows from YSOs and estimate the outflow mass-loss rates from the [Fe II] flux which are ∼1 × 10{sup –6}-4 × 10{sup –5} M {sub ☉} yr{sup –1}. We propose that the [Fe II] features might be the ''footprint'' outflow features, but more studies are required to clarify whether or not this is the case. This is based on the morphological relation between the [Fe II] and 5 GHz radio features, the outflow mass-loss rate, the travel time of the [Fe II] features, and the existence of several YSO candidates near the UCHIIs. The UCHIIs accompanying the [Fe II] features have relatively higher peak flux densities. The fraction of UCHIIs accompanying the [Fe II] features, 5/237, is small when compared to the ∼90% detection rate of high-velocity CO gas around UCHIIs. We discuss some possible explanations for the low detection rate.

  9. Design features of first of its kind AFBC high pressure boiler for Kutch lignite fuel in Gujarat, India

    SciTech Connect (OSTI)

    Diwakar, K.K.; Mokashi, A.H.

    1999-11-01

    Gujarat Heavy Chemicals Limited (GHCL) in Gujarat State in India is one of the largest manufacturers of Soda Ash with modern most technology from Akzo of Neitherland. GHCL with earlier experience of firing of kind of lignite on travagrate boiler and with converted fluidized bed boiler has very clearly identified the problem areas for review and with that rich experience awarded contract to Thermax Babcock and Wilcox Limited (TBW), Pune, India a joint venture company of Thermax Limited, Pune, India and Babcock and Wilcox, USA. Accordingly, boiler has been designed to suit Kutch Lignite and Coal with AFBC Technology, Single Drum Design, top supported with underbed feeding system. Capacity of boiler is 90 Ton/Hr with design pressure of 130 kg/cm{sup 2} with superheated steam temperature of 510 C. This is the first boiler in India with such a high pressure and temperature conditions for this capacity firing lignite. Other first of its kind features include single drum boiler convection bank made with headers and tubes, riffled inbed evaporator tubes, erosion protection by surface coating and not by studs, line bed system for inert material, no soot blowers, specially designed double hinged SS supports for inbed superheater coils etc. This boiler also has a provision of over fire air arrangement for better combustion split. Other unique features include the start-up arrangement by HSD burners which can take the boiler up to 30% load, provision for flue gas recirculation system, specially designed SS air distribution nozzles, separate compartments for under feed, ash drain and air cooled distribution plate with 1:5 turndown. The paper discusses all the above design features.

  10. TH-E-17A-01: Internal Respiratory Surrogate for 4D CT Using Fourier Transform and Anatomical Features

    SciTech Connect (OSTI)

    Hui, C; Suh, Y; Robertson, D; Pan, T; Das, P; Crane, C; Beddar, S

    2014-06-15

    Purpose: To develop a novel algorithm to generate internal respiratory signals for sorting of four-dimensional (4D) computed tomography (CT) images. Methods: The proposed algorithm extracted multiple time resolved features as potential respiratory signals. These features were taken from the 4D CT images and its Fourier transformed space. Several low-frequency locations in the Fourier space and selected anatomical features from the images were used as potential respiratory signals. A clustering algorithm was then used to search for the group of appropriate potential respiratory signals. The chosen signals were then normalized and averaged to form the final internal respiratory signal. Performance of the algorithm was tested in 50 4D CT data sets and results were compared with external signals from the real-time position management (RPM) system. Results: In almost all cases, the proposed algorithm generated internal respiratory signals that visibly matched the external respiratory signals from the RPM system. On average, the end inspiration times calculated by the proposed algorithm were within 0.1 s of those given by the RPM system. Less than 3% of the calculated end inspiration times were more than one time frame away from those given by the RPM system. In 3 out of the 50 cases, the proposed algorithm generated internal respiratory signals that were significantly smoother than the RPM signals. In these cases, images sorted using the internal respiratory signals showed fewer artifacts in locations corresponding to the discrepancy in the internal and external respiratory signals. Conclusion: We developed a robust algorithm that generates internal respiratory signals from 4D CT images. In some cases, it even showed the potential to outperform the RPM system. The proposed algorithm is completely automatic and generally takes less than 2 min to process. It can be easily implemented into the clinic and can potentially replace the use of external surrogates.

  11. The preliminary analysis on the steady-state and kinetic features of the molten salt pebble-bed reactor

    SciTech Connect (OSTI)

    Xia, B.; Lu, Y.

    2012-07-01

    A novel design concept of molten salt pebble-bed reactor with an ultra-simplified integral primary circuit called 'Nuclear Hot Spring' has been proposed, featured by horizontal coolant flow in a deep pool pebble-bed reactor, providing 'natural safety' features with natural circulation under full power operation and less expensive primary circuit arrangement. In this work, the steady-state physical properties of the equilibrium state of the molten salt pebble-bed reactor are calculated by using the VSOP code, and the steady-state thermo-hydraulic analysis is carried out based on the approximation of absolutely horizontal flow of the coolant through the core. A new concept of 2-dimensional, both axial and radial, multi-pass on-line fuelling scheme is presented. The result reveals that the radial multi-pass scheme provides more flattened power distribution and safer temperature distribution than the one-pass scheme. A parametric analysis is made corresponding to different pebble diameters, the key parameter of the core resistance and the temperature at the pebble center. It is verified that within a wide range of pebble diameters, the maximum pebble center temperatures are far below the safety limit of the fuel, and the core resistance is considerably less than the buoyant force, indicating that the natural circulation under full power operation is achievable and the ultra-simplified integral primary circuit without any pump is possible. For the kinetic properties, it is verified that the negative temperature coefficient is achieved in sufficient under-moderated condition through the preliminary analysis on the temperature coefficients of fuel, coolant and moderator. The requirement of reactivity compensation at the shutdown stages of the operation period is calculated for the further studies on the reactivity control. The molten salt pebble-bed reactor with horizontal coolant flow can provide enhanced safety and economical features. (authors)

  12. The Nature of the Distinctive Microscopic Features in R5(SixGe1-x)4 Magnetic Refrigeration Materials

    SciTech Connect (OSTI)

    Ozan Ugurlu

    2006-05-01

    Magnetic refrigeration is a promising technology that offers a potential for high energy efficiency. The giant magnetocaloric effect of the R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys (where R=rare-earth and O {le} x {le} 1), which was discovered in 1997, make them perfect candidates for magnetic refrigeration applications. In this study the microstructures of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} alloys have been characterized using electron microscopy techniques, with the focus being on distinctive linear features first examined in 1999. These linear features have been observed in R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys prepared from different rare-earths (Gd, Tb, Dy and Er) with different crystal structures (Gd{sub 5}Si{sub 4}-type orthorhombic, monoclinic and Gd{sub 5}Ge{sub 4}-type orthorhombic). Systematic scanning electron microscope studies revealed that these linear features are actually thin-plates, which grow along specific directions in the matrix material. The crystal structure of the thin-plates has been determined as hexagonal with lattice parameters a=b=8.53 {angstrom} and c=6.40 {angstrom} using selected area diffraction (SAD). Energy dispersive spectroscopy analysis, carried out in both scanning and transmission electron microscopes, showed that the features have a composition approximating to R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3}.phase. Orientation relationship between the matrix and the thin-plates has been calculated as [- 1010](1-211){sub p}//[010](10-2){sub m}. The growth direction of the thin plates are calculated as (22 0 19) and (-22 0 19) by applying the Ag approach of Zhang and Purdy to the SAD patterns of this system. High Resolution TEM images of the Gd{sub 5}Ge{sub 4} were used to study the crystallographic relationship. A terrace-ledge structure was observed at the interface and a 7{sup o} rotation of the reciprocal lattices with respect to each other, consistent with the determined orientation relationship, was noted

  13. Review of the design and performance features of hvdc systems connected to low short circuit ratio ac systems

    SciTech Connect (OSTI)

    Thallam, R.S. )

    1992-10-01

    The design and performance of an HVdc system is significantly impacted by the relative strength of the ac system to which it is connected. In this paper, design and performance features of ten HVdc systems are discussed. All of these systems are connected to ac systems that are relatively weak compared to the rating of the dc system. Six of these systems are back-to-back, two are overhead lines, and two are undersea cable connections. AC and dc system interaction problems and how they are addressed in the design and specification of each of these systems, are described.

  14. System and method employing a self-organizing map load feature database to identify electric load types of different electric loads

    DOE Patents [OSTI]

    Lu, Bin; Harley, Ronald G.; Du, Liang; Yang, Yi; Sharma, Santosh K.; Zambare, Prachi; Madane, Mayura A.

    2014-06-17

    A method identifies electric load types of a plurality of different electric loads. The method includes providing a self-organizing map load feature database of a plurality of different electric load types and a plurality of neurons, each of the load types corresponding to a number of the neurons; employing a weight vector for each of the neurons; sensing a voltage signal and a current signal for each of the loads; determining a load feature vector including at least four different load features from the sensed voltage signal and the sensed current signal for a corresponding one of the loads; and identifying by a processor one of the load types by relating the load feature vector to the neurons of the database by identifying the weight vector of one of the neurons corresponding to the one of the load types that is a minimal distance to the load feature vector.

  15. Effect of tool pin features on process response variables during friction stir welding of dissimilar aluminum alloys

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Rabby, Reza; Tang, Wei; Reynolds, A. P.

    2015-05-13

    In this article, the effect of pin features and orientation/placement of the materials on advancing side were investigated for friction stir welding (FSW) of dissimilar aluminum alloys AA2050 and AA6061. Pins for FSW were produced with a 2.12 mm pitch thread having three flats/flutes. Three sets of rotational speed/welding speed were used to perform a series of welds in a butt joint arrangement. The results show that, joint quality, process response variables and welding temperature are highly affected by pin features and material orientation in FSW. Defect free joints with effective material transportation in the weld nugget zone were obtainedmore » when welding was performed with AA2050 on the advancing side. The tool also encounters less in-plane reaction force for welding with 2050 on the advancing side. Pin with thread+3 flats produces quality welds at low rotational and travel speed regardless of the location of alloys on advancing or retreating side.« less

  16. High performance organic integrated device with ultraviolet photodetective and electroluminescent properties consisting of a charge-transfer-featured naphthalimide derivative

    SciTech Connect (OSTI)

    Wang, Hanyu; Wang, Xu; Yu, Junsheng E-mail: jsyu@uestc.edu.cn; Zhou, Jie; Lu, Zhiyun E-mail: jsyu@uestc.edu.cn

    2014-08-11

    A high performance organic integrated device (OID) with ultraviolet photodetective and electroluminescent (EL) properties was fabricated by using a charge-transfer-featured naphthalimide derivative of 6-(3,5-bis-[9-(4-t-butylphenyl)-9H-carbazol-3-yl]-phenoxy)-2- (4-t-butylphenyl)-benzo[de]isoquinoline-1,3-dione (CzPhONI) as the active layer. The results showed that the OID had a high detectivity of 1.5 × 10{sup 11} Jones at −3 V under the UV-350 nm illumination with an intensity of 0.6 mW/cm{sup 2}, and yielded an exciplex EL light emission with a maximum brightness of 1437 cd/m{sup 2}. Based on the energy band diagram, both the charge transfer feature of CzPhONI and matched energy level alignment were responsible for the dual ultraviolet photodetective and EL functions of OID.

  17. Effect of tool pin features on process response variables during friction stir welding of dissimilar aluminum alloys

    SciTech Connect (OSTI)

    Rabby, Reza; Tang, Wei; Reynolds, A. P.

    2015-05-13

    In this article, the effect of pin features and orientation/placement of the materials on advancing side were investigated for friction stir welding (FSW) of dissimilar aluminum alloys AA2050 and AA6061. Pins for FSW were produced with a 2.12 mm pitch thread having three flats/flutes. Three sets of rotational speed/welding speed were used to perform a series of welds in a butt joint arrangement. The results show that, joint quality, process response variables and welding temperature are highly affected by pin features and material orientation in FSW. Defect free joints with effective material transportation in the weld nugget zone were obtained when welding was performed with AA2050 on the advancing side. The tool also encounters less in-plane reaction force for welding with 2050 on the advancing side. Pin with thread+3 flats produces quality welds at low rotational and travel speed regardless of the location of alloys on advancing or retreating side.

  18. Effect of tool pin features on process response variables during friction stir welding of dissimilar aluminum alloys

    SciTech Connect (OSTI)

    Rabby, Reza; Tang, Wei; Reynolds, A. P.

    2015-07-01

    In this article, the effect of pin features and orientation/placement of the materials on advancing side were investigated for friction stir welding (FSW) of dissimilar aluminum alloys AA2050 and AA6061. Pins for FSW were produced with a 2.12 mm pitch thread having three flats/flutes. Three sets of rotational speed/welding speed were used to perform a series of welds in a butt joint arrangement. The results show that, joint quality, process response variables and welding temperature are highly affected by pin features and material orientation in FSW. Defect free joints with effective material transportation in the weld nugget zone were obtained when welding was performed with AA2050 on the advancing side. The tool also encounters less in-plane reaction force for welding with 2050 on the advancing side. Pin with thread+3 flats produces quality welds at low rotational and travel speed regardless of the location of alloys on advancing or retreating side.

  19. SU-E-J-258: Prediction of Cervical Cancer Treatment Response Using Radiomics Features Based On F18-FDG Uptake in PET Images

    SciTech Connect (OSTI)

    Altazi, B; Fernandez, D; Zhang, G; Biagioli, M; Moros, E; Moffitt, H. Lee

    2015-06-15

    Purpose: Radiomics have shown potential for predicting treatment outcomes in several body sites. This study investigated the correlation between PET Radiomics features and treatment response of cervical cancer outcomes. Methods: our dataset consisted of a cohort of 79 patients diagnosed with cervical cancer, FIGO stage IB-IVA, age range 25–86 years, (median age at diagnosis: 50 years) all treated between: 2009–14 with external beam radiation therapy to a dose range between: 45–50.4 Gy (median= 45 Gy), concurrent cisplatin chemotherapy and MRI-based brachytherapy to a dose of 20–30 Gy (median= 28 Gy). Metabolic Tumor Volume (MTV) in patient’s primary site was delineated on pretreatment PET/CT by two board certified Radiation Oncologists. The features extracted from each patient’s volume were: 26 Co-occurrence matrix (COM) Feature, 11 Run-Length Matrix (RLM), 11 Gray Level Size Zone Matrix (GLSZM) and 33 Intensity-based features (IBF). The treatment outcome was divided based on the last follow up status into three classes: No Evidence of Disease (NED), Alive with Disease (AWD) and Dead of Disease (DOD). The ability for the radiomics features to differentiate between the 3 treatments outcome categories were assessed by One-Way ANOVA test with p-value < 0.05 was to be statistically significant. The results from the analysis were compared with the ones obtained previously for standard Uptake Value (SUV). Results: Based on patients last clinical follow-up; 52 showed NED, 17 AWD and 10 DOD. Radiomics Features were able to classify the patients based on their treatment response. A parallel analysis was done for SUV measurements for comparison. Conclusion: Radiomics features were able to differentiate between the three different classes of treatment outcomes. However, most of the features were only able to differentiate between NED and DOD class. Also, The ability or radiomics features to differentiate types of response were more significant than SUV.

  20. Environment Feature Stories

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Information Administration (EIA) Power Plant Environmental International Emissions All Environment Data Reports Analysis & Projections All Reports ‹ environment State Carbon Dioxide Emissions Data for: 2013 | Release Date: October 26, 2015 | Next Release Date: October 2016 Summary By fuel By energy sectors State methodology State analysis Additional Tables Coal Commercial Electric Industrial Natural gas Petroleum Residential Transportation States Format Alabama Alaska Arizona Arkansas