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1

Trace element emissions  

SciTech Connect

The Energy & Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to (1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems, (2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions, and (3) identify methods to control trace element emissions.

Benson, S.A.; Erickson, T.A.; Steadman, E.N.; Zygarlicke, C.J.; Hauserman, W.B.; Hassett, D.J.

1994-10-01T23:59:59.000Z

2

Multimedia Trace Elements Measurements  

Science Conference Proceedings (OSTI)

Current and future trace element regulations on flue gas emissions, water discharges, and solid waste disposal will result in increasingly stringent limits and substantially increased costs for energy companies. As a result, there is a critical need to address environmental pollutant releases in a holistic, multimedia manner so that a pollutant removed by a control technology in one medium (for example, flue gas) is properly managed in regard to discharges in the other media (water and solid waste). This...

2008-03-25T23:59:59.000Z

3

Phytoremediation of Trace Elements by Wetland Plants  

Science Conference Proceedings (OSTI)

Some plants naturally absorb and hyperaccumulate trace elements in their tissues. In a process known as phytoremediation, scientists are harnessing this ability to remove toxic heavy metals and trace elements from contaminated soils and waters. This screening program quantified the capacity of various wetland plant species for removing trace elements from polluted water.

2001-08-23T23:59:59.000Z

4

TRACE ELEMENT ANALYSES OF URANIUM MATERIALS  

SciTech Connect

The Savannah River National Laboratory (SRNL) has developed an analytical method to measure many trace elements in a variety of uranium materials at the high part-per-billion (ppb) to low part-per-million (ppm) levels using matrix removal and analysis by quadrapole ICP-MS. Over 35 elements were measured in uranium oxides, acetate, ore and metal. Replicate analyses of samples did provide precise results however none of the materials was certified for trace element content thus no measure of the accuracy could be made. The DOE New Brunswick Laboratory (NBL) does provide a Certified Reference Material (CRM) that has provisional values for a series of trace elements. The NBL CRM were purchased and analyzed to determine the accuracy of the method for the analysis of trace elements in uranium oxide. These results are presented and discussed in the following paper.

Beals, D; Charles Shick, C

2008-06-09T23:59:59.000Z

5

Trace Element Analysis | Open Energy Information  

Open Energy Info (EERE)

Trace Element Analysis Trace Element Analysis Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Trace Element Analysis Details Activities (8) Areas (8) Regions (4) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Fluid Lab Analysis Parent Exploration Technique: Fluid Lab Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Reconstructing the fluid circulation of a hydrothermal system Thermal: Cost Information Low-End Estimate (USD): 15.001,500 centUSD 0.015 kUSD 1.5e-5 MUSD 1.5e-8 TUSD / element Median Estimate (USD): 18.001,800 centUSD 0.018 kUSD 1.8e-5 MUSD 1.8e-8 TUSD / element High-End Estimate (USD): 106.0010,600 centUSD 0.106 kUSD 1.06e-4 MUSD 1.06e-7 TUSD / element

6

Biological trace element measurements using synchrotron radiation  

SciTech Connect

The feasibility of performing x-ray fluorescence trace element determinations at concentrations substantially below the ppM level for biological materials is demonstrated. Conditions for achieving optimum sensitivity were ascertained. Results achieved for five standard reference materials were, in most cases, in excellent agreement with listed values. Minimum detectable limits of 20 ppM were measured for most elements.

Giauque, R.D.; Jaklevic, J.M.; Thompson, A.C.

1985-07-01T23:59:59.000Z

7

12.479 Trace-Element Geochemistry, Fall 2006  

E-Print Network (OSTI)

Focuses on element distribution in rocks and minerals using data obtained from natural and experimental systems. Emphasizes models describing trace-element partitioning and applications of trace-element geochemistry to ...

Frey, Frederick August

8

Trace element speciation under coal fired power station conditions  

Science Conference Proceedings (OSTI)

Coal combustion from power stations is one of the largest contributors of potentially toxic trace elements to the environment. Some trace elements may be released in range of valencies, often with varying toxicity and bioavailability. Hence, determination ... Keywords: arsenic, chromium, coal combustion, mercury, selenium, speciation, trace elements

Pushan Shah; Vladimir Strezov; Peter F. Nelson

2007-05-01T23:59:59.000Z

9

Leaching of Trace Elements From Highway Materials Stabilized ...  

Leaching of Trace Elements From Highway Materials Stabilized with Coal Fly Ash Craig H. Benson, PhD, PE Professor, Geo Engineering Program Dept. of ...

10

Effect of Trace Elements on Anaerobic Digestion of Coking Wastewater  

Science Conference Proceedings (OSTI)

The pretreatment of coking wastewater using ASBR was conducted at 35? in this paper. The addition of trace elements to the anaerobic reactor has positive effect on the anaerobic treatment of coking wastewater, but too much or too little of it will ... Keywords: trace elements, anaerobic digestion, coking wastewater

Yu-ying Li; Bing Li

2009-10-01T23:59:59.000Z

11

Factors influencing trace element composition in human teeth  

SciTech Connect

The authors recently compiled and reviewed the literature published in or after 1978 for 45 major, minor, and trace elements in human teeth as a part of an International Atomic Energy Agency (IAEA) study. The purpose of this paper is to discuss the various factors that influence the concentration levels of certain trace elements in human teeth. The sampling practices and analytical techniques that are applicable for trace element analysis are also discussed. It is also our intention to identify reference range of values, where data permit such conclusions. The scrutiny was designed to identify only the healthy permanent teeth, and values from teeth with fillings, caries, or periodontal diseases were eliminated.

Tandon, L. [Los Alamos National Lab., NM (United States); Iyengar, G.V. [Biomineral Sciences International, Inc., Bethesda, MD (United States)

1997-12-01T23:59:59.000Z

12

Trace element fingerprinting of ancient Chinese gold with femtosecond laser  

NLE Websites -- All DOE Office Websites (Extended Search)

Trace element fingerprinting of ancient Chinese gold with femtosecond laser Trace element fingerprinting of ancient Chinese gold with femtosecond laser ablation-inductivity coupled mass spectrometry Title Trace element fingerprinting of ancient Chinese gold with femtosecond laser ablation-inductivity coupled mass spectrometry Publication Type Journal Article Year of Publication 2009 Authors Brostoff, Lynn B., Jhanis J. Gonzalez, Paul Jett, and Richard E. Russo Journal Journal of Archeological Science Volume 36 Start Page 461 Issue 2 Pagination 461-466 Date Published 02/2009 Keywords Ancient gold, femtosecond, la-icp-ms, Trace element Abstract In this collaborative investigation, femtosecond laser ablation-inductively coupled mass spectrometry (LA-ICP-MS) was applied to the study of a remarkable group of ancient Chinese gold objects in the Smithsonian's Freer Gallery of Art and Arthur M. Sackler Gallery. Taking advantage of the superior ablation characteristics and high precision of a femtosecond 266 nm Ti:sapphire laser at Lawrence Berkeley National Laboratory, major, minor and trace element concentrations in the gold fragments were quantified. Results validate use of femtosecond LA-ICP-MS for revealing ''fingerprints'' in minute gold samples. These fingerprints allow us to establish patterns based on the association of silver, palladium and platinum that support historical, technical and stylistic relationships, and shed new light on these ancient objects.

13

Trace elements in oil shale. Progress report, 1976--1979  

DOE Green Energy (OSTI)

The overall objective of the program is to evaluate the environmental and health consequences of the release of toxic trace elements (As, B, F, Mo, Se) by shale oil production and use. Some of the particularly significant results are: The baseline geochemical survey shows that stable trace elements maps can be constructed for numerous elements and that the trends observed are related to geologic and climatic factors. Shale retorted by above-ground processes tends to be very homogeneous (both in space and in time) in trace element content. This implies that the number of analytical determinations required of processed shales is not large. Leachate studies show that significant amounts of B, F, And Mo are released from retorted shales and while B and Mo are rapidly flushed out, F is not. On the other hand, As, Se, and most other trace elements ae not present in significant quantities. Significant amounts of F and B are also found in leachates of raw shales. Very large concentrations of reduced sulfur species are found in leachates of processed shale. Upon oxidation a drastic lowering in pH is observed. Preliminary data indicates that this oxidation is catalyzed by bacteria. Very high levels of B and Mo are taken up in some plants growing on processed shale with and without soil cover. These amounts depend upon the process and various site specific characteristics. In general, the amounts taken up decrease with increasing soil cover. On the other hand, we have not observed significant uptake of As, Se, and F into plants. There is a tendency for some trace elements to associate with specific organic fractions, indicating that organic chelation or complexation may play an important role. In particular, most of the Cd, Se, and Cr in shale oil is associated with the organic fraction containing most of the nitrogen-containing compounds.

Chappell, W.R.

1979-01-01T23:59:59.000Z

14

AIR QUALITY: MERCURY, TRACE ELEMENTS, AND PARTICULATE MATTER CONFERENCE  

SciTech Connect

This final report summarizes the planning/preparation, facilitation, and outcome of the conference entitled ''Air Quality: Mercury, Trace Elements, and Particulate Matter'' that was held December 1-4, 1998, in McLean, Virginia (on the outskirts of Washington, DC). The goal of the conference was to bring together industry, government, and the research community to discuss the critical issue of how air quality can impact human health and the ecosystem, specifically hazardous air pollutants and fine airborne particles; available and developing control technologies; strategies and research needs; and an update on federal and state policy and regulations, related implementation issues, and the framework of the future.

John H. Pavlish; Steven A. Benson

1999-07-01T23:59:59.000Z

15

Adsorption of Trace Elements on Fresh and Weathered Coal Fly Ash  

Science Conference Proceedings (OSTI)

A variety of trace elements are associated with fly ash produced by coal combustion. These trace elements are potentially of concern for human health if they are released to the environment, and thus it is important to understand their mobility in coal fly ash management settings. In the fly ash management environment, the ash may react with meteoric fluid to release trace elements into groundwater or surface water. However, fly ash particles also have a relatively high surface area and have the ability ...

2012-05-23T23:59:59.000Z

16

Trace Element Remediation by Free-Living and Plant-Associated Microbes  

Science Conference Proceedings (OSTI)

Plants can accumulate, detoxify, and transform trace elements present in contaminated soil and water, leading to the phytoremediation of contaminated sites. This study considers the role of plant-associated microbes in the phytoremediation of trace elements, particularly selenium (Se), in the root zone (rhizosphere) as well as the isolation and characterization of free-living microbes for Se bioremediation.

2003-11-05T23:59:59.000Z

17

Elevated Trace Element Concentrations in Southern Toads, Bufo terrestris, Exposed to Coal Combustion Waste  

E-Print Network (OSTI)

Elevated Trace Element Concentrations in Southern Toads, Bufo terrestris, Exposed to Coal, and behavioral abnormalities in amphibians to coal combustion wastes (coal ash). Few studies, however, have determined trace element concentrations in amphibians exposed to coal ash. In the current study we compare

Hopkins, William A.

18

Laboratory Evaluation of Novel Trace Element Removal Technologies for Wet FGD Wastewater  

Science Conference Proceedings (OSTI)

Wet flue gas desulfurization (FGD) systems can remove a wide range of trace elements, such as mercury, selenium, arsenic, and others from the flue gas. Some trace elements leave the FGD system with solid byproduct streams, but a portion generally leaves as dissolved species in the FGD chloride purge stream. The U.S. Environmental Protection Agency (EPA) effluent limitation guidelines and state or local regulations generally limit the quantities of these trace species in wastewater discharges from ...

2012-12-31T23:59:59.000Z

19

Trace Element Analysis At Walker-Lane Transitional Zone Region (Coolbaugh,  

Open Energy Info (EERE)

Trace Element Analysis At Walker-Lane Transitional Zone Region (Coolbaugh, Trace Element Analysis At Walker-Lane Transitional Zone Region (Coolbaugh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Walker-Lane Transitional Zone Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for

20

Trace Element Analysis At Nw Basin & Range Region (Coolbaugh, Et Al., 2010)  

Open Energy Info (EERE)

Trace Element Analysis At Nw Basin & Range Region (Coolbaugh, Et Al., 2010) Trace Element Analysis At Nw Basin & Range Region (Coolbaugh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Nw Basin & Range Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Comparative assessment of the trace-element composition of coals, crude oils, and oil shales  

Science Conference Proceedings (OSTI)

A comparative analysis of the amounts of 42 trace elements in coals, crude oils, and oil and black shales was performed. The degree of concentration of trace elements by caustobioliths and their ashes relative to their abundance in argillaceous rocks and the Earth's crust was calculated. Typomorphic trace elements were distinguished, of which many turned out to be common for the different kinds of caustobioliths in question. The trace elements were classified according to their concentration factors in different caustobioliths. The ash of crude oils is enriched in trace elements (Cs, V, Mo, Cu, Ag, Au, Zn, Hg, Se, Cr, Co, Ni, U) to the greatest extent (concentration factor above 3.5) and that of oil shales is enriched to the least extent (Re, Cs, Hg, Se). The ratios between typomorphic trace elements in general strongly differ from those in the Earth's crust and argillaceous rocks and are not identical in different caustobioliths. Quantitative parameters that make it possible to calculate a change in these ratios on passing from one caustobiolith type to another were proposed and the relative trace-element affinity of different caustobioliths was estimated.

M.Y. Shpirt; S.A. Punanova [Institute for Fossil Fuels, Moscow (Russian Federation)

2007-10-15T23:59:59.000Z

22

Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot  

Open Energy Info (EERE)

Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Springs Thermal Area, Utah Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Springs Thermal Area, Utah Details Activities (3) Areas (1) Regions (0) Abstract: Chemical interaction of thermal fluids with reservoir rock in the Roosevelt Hot Springs thermal area, Utah, has resulted in the development of characteristic trace-element dispersion patterns. Multielement analyses of surface rock samples, soil samples and drill cuttings from deep exploration wells provide a three-dimensional perspective of chemical redistribution within this structurally-controlled hot-water geothermal system. Five distinctive elemental suites of chemical enrichment are

23

Trace Element Analysis At Socorro Mountain Area (Owens, Et Al., 2005) |  

Open Energy Info (EERE)

Trace Element Analysis At Socorro Mountain Area (Owens, Et Al., 2005) Trace Element Analysis At Socorro Mountain Area (Owens, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Socorro Mountain Area (Owens, Et Al., 2005) Exploration Activity Details Location Socorro Mountain Area Exploration Technique Trace Element Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes In order to determine which of the faults in these regions were active and open to hydrothermal fluid circulation, we have employed selective ion geochemistry that is a new geochemical method capable of detecting anomalous concentrations for up to 47 elements transported to soils by geochemical cells or low pressure vapors. Enzyme leach and Terrasol leach are two such techniques. This method has to datae been mostly applied to

24

Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area,  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Abstract Chemical interaction of thermal brines with reservoir rock in the Roosevelt Hot Springs thermal area has resulted in the development of distinctive trace element signatures. Geochemical analysis of soil sample, shallow temperature gradient drill hole cuttings and deep drill hole cutting provides a three dimensional perspective of trace element distributions within the system. Distributions of As, Hg and Li provide the clearest expression of hydrothermal activity. Comparison of these distribution

25

Theoretical investigation of selected trace elements in coal gasification plants. Final report Mar 78-Nov 79  

SciTech Connect

The report gives results of a theoretical investigation of the disposition of five volatile trace elements (arsenic, boron, lead, selenium, and mercury) in SNG-producing coal gasification plants. Three coal gasification processes (dry-bottom Lurgi, Koppers-Totzek, and HYGAS) were investigated to examine the possible effects of gasifier operation conditions on the speciation of the volatile trace elements. Results of this investigation suggest that none of the trace elements considered in this study will be present in the product SNG from a coal gasification plant, but will be removed from the fuel gas by various unit operations. Results also suggest that speciation of these volatile trace elements is not significantly affected by gasifier conditions.

Hill, A.H.; Anderson, G.L.; Fleming, D.K.

1983-08-01T23:59:59.000Z

26

Long-term anaerobic digestion of food waste stabilized by trace elements  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Korean food waste was found to contain low level of trace elements. Black-Right-Pointing-Pointer Stable anaerobic digestion of food waste was achieved by adding trace elements. Black-Right-Pointing-Pointer Iron played an important role in anaerobic digestion of food waste. Black-Right-Pointing-Pointer Cobalt addition further enhanced the process performance in the presence of iron. - Abstract: The purpose of this study was to examine if long-term anaerobic digestion of food waste in a semi-continuous single-stage reactor could be stabilized by supplementing trace elements. Contrary to the failure of anaerobic digestion of food waste alone, stable anaerobic digestion of food waste was achieved for 368 days by supplementing trace elements. Under the conditions of OLR (organic loading rates) of 2.19-6.64 g VS (volatile solid)/L day and 20-30 days of HRT (hydraulic retention time), a high methane yield (352-450 mL CH{sub 4}/g VS{sub added}) was obtained, and no significant accumulation of volatile fatty acids was observed. The subsequent investigation on effects of individual trace elements (Co, Fe, Mo and Ni) showed that iron was essential for maintaining stable methane production. These results proved that the food waste used in this study was deficient in trace elements.

Zhang Lei, E-mail: wxzyfx@yahoo.com [Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024 (China); Jahng, Deokjin, E-mail: djahng@mju.ac.kr [Department of Environmental Engineering and Biotechnology, Myongji University, San 38-2, Namdong, Cheoin-Gu, Yongin, Gyeonggi-Do 449-728 (Korea, Republic of)

2012-08-15T23:59:59.000Z

27

Trace Element Geochemical Zoning in the Roosevelt Hot Springs...  

Open Energy Info (EERE)

Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Abstract Chemical interaction of thermal brines with reservoir rock in the Roosevelt Hot Springs...

28

Trace Element Analysis At Walker-Lane Transitional Zone Region...  

Open Energy Info (EERE)

the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium deposits." References Mark Coolbaugh, Paul Lechler, Chris...

29

Trace Element Analysis At Northern Basin & Range Region (Coolbaugh...  

Open Energy Info (EERE)

the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium deposits." References Mark Coolbaugh, Paul Lechler, Chris...

30

Trace Element Analysis At Central Nevada Seismic Zone Region...  

Open Energy Info (EERE)

the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium deposits." References Mark Coolbaugh, Paul Lechler, Chris...

31

Trace Element Analysis At Nw Basin & Range Region (Coolbaugh...  

Open Energy Info (EERE)

the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium deposits." References Mark Coolbaugh, Paul Lechler, Chris...

32

Trace Element Analysis At Central Nevada Seismic Zone Region (Coolbaugh, Et  

Open Energy Info (EERE)

Coolbaugh, Et Coolbaugh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Central Nevada Seismic Zone Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa

33

Trace-element geochemistry of coal resource development related to environmental quality and health  

Science Conference Proceedings (OSTI)

This report assesses for decision makers and those involved in coal resource development the environmental and health impacts of trace-element effects arising from significant increases in the use of coal, unless unusual precautions are invoked. Increasing demands for energy and the pressing need for decreased dependence of the United States on imported oil require greater use of coal to meet the nation's energy needs during the next decade. If coal production and consumption are increased at a greatly accelerated rate, concern arises over the release, mobilization, transportation, distribution, and assimilation of certain trace elements, with possible adverse effects on the environment and human health. It is, therefore, important to understand their geochemical pathways from coal and rocks via air, water, and soil to plants, animals, and ultimately humans, and their relation to health and disease. To address this problem, the Panel on Trace Element Geochemistry of Coal Resource Development Related to Health (PECH) was established. Certain assumptions were made by the Panel to highlight the central issues of trace elements and health and to avoid unwarranted duplication of other studies. Based on the charge to the Panel and these assumptions, this report describes the amounts and distribution of trace elements related to the coal source; the various methods of coal extraction, preparation, transportation, and use; and the disposal or recycling of the remaining residues or wastes. The known or projected health effects are discussed at the end of each section.

Not Available

1980-01-01T23:59:59.000Z

34

Trace Element Analysis At Northern Basin & Range Region (Coolbaugh, Et Al.,  

Open Energy Info (EERE)

At Northern Basin & Range Region (Coolbaugh, Et Al., At Northern Basin & Range Region (Coolbaugh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Northern Basin & Range Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for

35

Trace Element Analysis At Roosevelt Hot Springs Area (Christensen, Et Al.,  

Open Energy Info (EERE)

Christensen, Et Al., Christensen, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Roosevelt Hot Springs Area (Christensen, Et Al., 1983) Exploration Activity Details Location Roosevelt Hot Springs Area Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes Three of the recognized trace-element suites are characteristic of the surface and near-surface environment. These are: (1) concentrations of As, Sb, Be and Hg associated with siliceous material at the location of liquid discharge, fluid mixing, or at boiling interfaces; (2) deposits of Mn and Fe oxides containing concentrations of Ba, W, Be, Co, Cu, As, Sb and Hg formed by the oxidation of cooled brines; and (3) high concentrations of Hg

36

Determination of Trace Element Concentrations at an Eastern Bituminous Coal Plant Employing an SCR and Wet FGD  

Science Conference Proceedings (OSTI)

Previous sampling has shown that air pollution control devices can have a significant impact on mercury and other trace elements. For example, selective catalytic reduction (SCR) can substantially increase the percentage of oxidized mercury that can then be removed by a wet flue gas desulfurization (FGD) system. The electrostatic precipitator (ESP) also readily captures most of the trace elements of interest. The emission of these trace elements is then directly related to the overall particulate collect...

2008-08-12T23:59:59.000Z

37

Distribution and speciation of trace elements in iron and manganese oxide cave deposits  

SciTech Connect

Fe and Mn oxide minerals control the distribution and speciation of heavy metals and trace elements in soils and aquatic systems through chemical mechanisms involving adsorption, incorporation, and electron transfer. The Pautler Cave System in Southwest Illinois, an analog to other temperate carbonate-hosted karst systems, contains Fe and Mn oxide minerals that form in multiple depositional environments and have high concentrations of associated trace elements. Synchrotron-based micro-scanning X-ray fluorescence ({mu}-SXRF) shows unique spatial distributions of Fe, Mn, and trace elements in mineral samples. Profile maps of Mn oxide cave stream pebble coatings show Fe- and As-rich laminations, indicating dynamic redox conditions in the cave stream. {mu}-SXRF maps demonstrate that Ni, Cu, and Zn correlate primarily with Mn whereas As correlates with both Mn and Fe; As is more enriched in the Fe phase. Zn is concentrated in the periphery of Mn oxide stream pebble coatings, and may be an indication of recent anthropogenic surface activity. X-ray absorption fine structure spectroscopy measurements reveal that As(V) occurs as surface complexes on Mn and Fe oxides whereas Zn(II) associated with Mn oxides is adsorbed to the basal planes of phyllomanganates in a tetrahedral coordination. Co(III) and Se(IV) are also observed to be associated with Mn oxides. The observation of Fe, Mn, and trace element banding in Mn oxide cave stream pebble coatings suggests that these materials are sensitive to and document aqueous redox conditions, similar to ferromanganese nodules in soils and in marine and freshwater sediments. Furthermore, speciation and distribution measurements indicate that these minerals scavenge trace elements and limit the transport of micronutrients and contaminants in karst aquifer systems while also potentially recording changes in anthropogenic surface activity and land-use.

Frierdich, Andrew J.; Catalano, Jeffrey G. (WU)

2012-10-24T23:59:59.000Z

38

An in situ approach to study trace element partitioning in the laser heated diamond anvil cell  

Science Conference Proceedings (OSTI)

Data on partitioning behavior of elements between different phases at in situ conditions are crucial for the understanding of element mobility especially for geochemical studies. Here, we present results of in situ partitioning of trace elements (Zr, Pd, and Ru) between silicate and iron melts, up to 50 GPa and 4200 K, using a modified laser heated diamond anvil cell (DAC). This new experimental set up allows simultaneous collection of x-ray fluorescence (XRF) and x-ray diffraction (XRD) data as a function of time using the high pressure beamline ID27 (ESRF, France). The technique enables the simultaneous detection of sample melting based to the appearance of diffuse scattering in the XRD pattern, characteristic of the structure factor of liquids, and measurements of elemental partitioning of the sample using XRF, before, during and after laser heating in the DAC. We were able to detect elements concentrations as low as a few ppm level (2-5 ppm) on standard solutions. In situ measurements are complimented by mapping of the chemical partitions of the trace elements after laser heating on the quenched samples to constrain the partitioning data. Our first results indicate a strong partitioning of Pd and Ru into the metallic phase, while Zr remains clearly incompatible with iron. This novel approach extends the pressure and temperature range of partitioning experiments derived from quenched samples from the large volume presses and could bring new insight to the early history of Earth.

Petitgirard, S.; Mezouar, M. [European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, BP 220, 38043 Grenoble (France); Borchert, M.; Appel, K.; Liermann, H.-P. [Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg (Germany); Andrault, D. [Universite Blaise Pascal, Laboratoire des Magmas and Volcans, 5 rue Kessler 63038, Clermont-Ferrand (France)

2012-01-15T23:59:59.000Z

39

Trace Element Analysis At Long Valley Caldera Area (Klusman & Landress,  

Open Energy Info (EERE)

Klusman & Landress, Klusman & Landress, 1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Trace Element Analysis At Long Valley Caldera Area (Klusman & Landress, 1979) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Trace Element Analysis Activity Date Usefulness useful DOE-funding Unknown Notes This study involved the field collection and laboratory analysis of Al-horizon soil samples in the vicinity of a known geothermal source at Long Valley, California. The samples were analyzed for several constituents known to have influence on Hg retention by soils, including pH, hydrous Fe and Mn, and organic carbon, as well as Hg. The data compiled for these secondary parameters and the field-determined parameters of geology, soil

40

Atmospheric Deposition of Mercury, Trace Elements, and Major Ions Around a Coal-fired Power Plant  

Science Conference Proceedings (OSTI)

This report describes the results of a multiyear study to measure mercury (Hg), trace elements, and major ions in precipitation around Plant Crist, a four-unit coal-fired power plant in Pensacola, Florida. The main purpose of the study was to see if Hg emissions from Plant Crist could be detected and quantified in local wet deposition. Specifically, the study evaluated whether the significant reduction in Hg emissions that accompanied the installation of a wet flue gas desulfurization scrubber ...

2013-12-22T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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41

Isotopic and trace element characteristics of rhyolites from the Valles Caldera, New Mexico. Final technical report  

DOE Green Energy (OSTI)

This report is a summary of work supported by DOE grant No. DE-FGO5-87ER13795 that was completed or is still in progress. The stated purpose of this grant was to collect geochemical information (trace element, radiogenic isotope and stable oxygen and hydrogen isotope) on samples from core holes VC-I and VC-2a in the Valles caldera in order to establish a consistent detailed intracaldera stratigraphy and relate this to extracaldera volcanic rock units of the Jemez Mountains. Careful stratigraphic control of the intracaldera units is necessary to evaluate models of caldera formation, ignimbrite deposition, and resurgence. Combined stable and radiogenic isotope and trace element data will also provide major insights to petrogenesis of the Bandelier magma system. The composition of non-hydrothermally altered samples from outflow units of the Bandelier Tuff and related volcanics must be known to assess isotopic variations of intracaldera ignimbrite samples. On detailed examination of the VC-2a core samples, it became apparent that hydrothermal alteration is so extensive that no geochemical information useful for stratigraphic fingerprinting or petrogenesis could be obtained, and that correlation with other intracaldera units and extracaldera units must be made on the basis of stratigraphic position and gross lithologic characteristics. Accordingly, we emphasize geochemical data from the extracaldera Bandelier Tuffs and related units which will be useful for comparison with proposed drill hole VC-4 and for any future studies of the region. The stable isotope, radiogenic isotope and trace element data obtained from this project, combined with existing major and trace element data for volcanic rocks from this area, provide an extensive data base essential to future Continental Scientific Drilling Program projects in the Jemez Mountains of New Mexico.

Self, S.; Sykes, M.L. [Hawaii Univ., Honolulu, HI (United States). Dept. of Geology and Geophysics; Wolff, J.A. [Texas Univ., Arlington, TX (United States). Dept. of Geology; Skuba, C.E. [McMaster Univ., Hamilton, ON (Canada). Dept. of Geology

1991-09-01T23:59:59.000Z

42

Trace Elemental Variation in Dosidicus Gigas Statoliths Using LA-ICP-MS  

E-Print Network (OSTI)

Range expansion events of the Humboldt squid reveal our inadequate understanding of populations of this species. Despite recent hatching, reproductive, tagging, genetic and dietary studies of Dosidicus gigas, much speculation remains concerning geographic migration, stock assessment and habitat preferences. This study provides evidence that statolith trace elemental variations can be useful in distinguishing among geographic populations. Specimens were collected from the Galapagos Islands, southern California, and Washington State. A dissection method was recorded and published. By using laser ablation methods, discrete measurements of 10 elements were collected at 6 to 7 ablation sites covering embryonic, paralarval, juvenile and adult stages. Analysis of Variance revealed important ontogenic elemental variations among ablation locations. Multivariate Analysis of Variance, ordination techniques and discriminant function analysis with permutation testing were all utilized to compare and characterize the variations found in elemental concentrations. Significant ontogenic variations were found for 8 out of the 10 focus elements; this is the first report for 5 of these elements for this species. The geographic populations were effectively classified as distinct group for the first time using these methods. Elemental fingerprint signatures were found to be significantly different at multiple ontogenic growth regions of the statolith. Seattle and California paralarvae exhibited similar elemental signatures despite significant differences in those found in the embryonic core and juvenile regions of the statolith. These methods are a useful tool in providing stock assessment and can be improved for use in future population dynamics models.

Arbuckle, Nancy 1980-

2012-12-01T23:59:59.000Z

43

Telling friends from foes : strontium isotope and trace element analysis of companion burials from Pusilh, Toledo District, Belize  

E-Print Network (OSTI)

Powell 1972 Strontium Isotope Geology. Minerals, Rocks, andisotope ratios in an ecosystem are a factor of the local geology andisotope and trace element values in human bone vary depending on the geology

Somerville, Andrew D.

2010-01-01T23:59:59.000Z

44

The Allegheny Power Service Constructed Wetland at Springdale: The Role of Plants in the Removal of Trace Elements  

Science Conference Proceedings (OSTI)

Constructed wetlands are proving an effective technology for the removal of many aqueous contaminants. The ability of wetlands to remove contaminants such as trace elements appears to be a function of both the physical trapping of suspended materials and the biological and chemical processes occurring within the wetlands. Thus, wetlands are commonly described as "biogeochemical reactors." This report details a study of trace element removal and sequestration within a highly engineered wetland designed to...

2001-11-05T23:59:59.000Z

45

Source characterization studies at the Paraho semiworks oil shale retort. [Redistribution of trace and major elements  

DOE Green Energy (OSTI)

In order to determine the redistribution of trace and major elements and species during aboveground oil shale retorting, a comprehensive program was carried out for the sampling and analysis of feedstock, products, effluents, and ambient particulates from the Paraho Semiworks Retort. Samples were obtained during two periods in 1977 when the retort was operating in the direct mode. The data were used to construct mass balances for 31 trace and major elements in various effluents, including the offgas. The computed mass balances indicated that approx. 1% or greater fractions of the As, Co, Hg, N, Ni, S, and Se were released during retorting and redistributed to the product oil, retort water, or product offgas. The fraction released for these seven elements ranged from approx. 1% for Co and Ni to 50 to 60% for Hg and N. Approximately 20% of the S and 5% each of the As and Se were released. Ambient aerosols were found to be elevated near the retorting facility and associated crushing and retorted shale disposal sites. Approximately 50% of these particles were in the respirable range (< 5 ..mu..m). The elevated dust loadings are presented very local, as indicated by relatively low aerosol loadings at background sites 100 to 200 m away. State-of-the-art dust control measures were not employed. 15 figures, 19 tables.

Fruchter, J.S.; Wilkerson, C.L.; Evans, J.C.; Sanders, R.W.; Abel, K.W.

1979-05-01T23:59:59.000Z

46

Concentration of major and trace elements in the Miocene lignite from the Canakkale-Can coalfield  

SciTech Connect

This study focuses on major and trace element concentrations of three lignite samples, of which two are from the working lignite seam and one from a feed coal to an thermal power plant. The Canakkale-Can lignite deposit is currently being mined by open-cast mining methods despite its high sulfur content. The production lignites are mainly consumed by a fluidized-bed thermal power plant with 2 160 MW capacity and less domestic heating and industrial factories around Can. Major oxide compositions of the coal ash samples imply that the more abundant oxides are SiO{sub 2} and Al{sub 2}O{sub 3} and less CaO and Fe2O{sub 3}. Trace element concentrations in the samples on whole-coal basis show that three samples analyzed were enriched in V, and also concentrations of B, Sc, Sn, Th, Tl, and U in one sample that exceed the range values of most world coals.

Inaner, H.; Karayigit, A. [Dokuz Eylul University, Izmir (Turkey). Dept. of Geological Engineering

2008-07-01T23:59:59.000Z

47

Mass balance of major and trace elements in a coal-fired power plant  

SciTech Connect

A total of 48 samples, feed coals (FCs), fly ashes (FAs) and bottom ashes (BAs), which were systematically collected once a week over an eight-week period from boiler units, B1-4 with 660 MW and B5-6 with 330 MW capacity from Soma power plant, have been evaluated for major and trace elements (Al, Ca, Fe, K, Mg, Mn, Na, Ti, S, As, B, Ba, Be, Bi, Cd, Co, Cr, Cu, Cs, Ga, Ge, Hf, Hg, Li, Mo, Nb, Ni, P, Pb, Rb, Sb, Sc, Se, Sn, Sr, Ta, Th, Tl, U, V, Y, Zn, Zr, and REEs) to get information on behavior during coal combustion. This study indicates that some elements such as Hg, Bi, Cd, As, Pb, Ge, Tl, Sn, Zn, Sb, B show enrichments in FAs relative to the BAs in both group boiler units. In addition to these, Cs, Lu, Tm, and Ga in Units B1-4 and S in Units B5-6 also have enrichments in FAs. Elements showing enrichments in BAs in both group boiler units are Ta, Mn, Nb. In addition to these, Se, Ca, Mg, Na, Fe in Units B1-4 and Cu in Units B5-6 also have enrichments in BAs. The remaining elements investigated in this study have no clear segregation between FAs and BAs. Mass balance calculations with the two methods show that some elements, S, Ta, Hg, Se, Zn, Na, Ca in Units B1-4, and Hg, S, Ta, Se, P in Units B5-6, have volatile behavior during coal combustion in the Soma power plant. This study also implies that some elements, Sb and Tb in Units B1-4 and Sb in Units B5-6, have relatively high retention effects in the combustion residues from the Soma power plant.

Karayigit, A.I.; Bulut, Y.; Karayigit, G.; Querol, X.; Alastuey, A.; Vassilev, S.; Vassileva, C. [Hacettepe University, Ankara (Turkey)

2006-10-15T23:59:59.000Z

48

Surface kinetic model for isotopic and trace element fractionation during precipitation of calcite from aqueous solution  

SciTech Connect

A surface reaction kinetic model is developed for predicting Ca isotope fractionation and metal/Ca ratios of calcite as a function of rate of precipitation from aqueous solution. The model is based on the requirements for dynamic equilibrium; i.e. proximity to equilibrium conditions is determined by the ratio of the net precipitation rate (R{sub p}) to the gross forward precipitation rate (R{sub f}), for conditions where ionic transport to the growing crystal surface is not rate-limiting. The value of R{sub p} has been experimentally measured under varying conditions, but the magnitude of R{sub f} is not generally known, and may depend on several factors. It is posited that, for systems with no trace constituents that alter the surface chemistry, R{sub f} can be estimated from the bulk far-from-equilibrium dissolution rate of calcite (R{sub b} or k{sub b}), since at equilibrium R{sub f} = R{sub b}, and R{sub p} = 0. Hence it can be inferred that R{sub f} {approx} R{sub p} + R{sub b}. The dissolution rate of pure calcite is measureable and is known to be a function of temperature and pH. At given temperature and pH, equilibrium precipitation is approached when R{sub p} (= R{sub f} - R{sub b}) << R{sub b}. For precipitation rates high enough that R{sub p} >> R{sub b}, both isotopic and trace element partitioning are controlled by the kinetics of ion attachment to the mineral surface, which tend to favor more rapid incorporation of the light isotopes of Ca and discriminate weakly between trace metals and Ca. With varying precipitation rate, a transition region between equilibrium and kinetic control occurs near R{sub p} {approx} R{sub b} for Ca isotopic fractionation. According to this model, Ca isotopic data can be used to estimate R{sub f} for calcite precipitation. Mechanistic models for calcite precipitation indicate that the molecular exchange rate is not constant at constant T and pH, but rather is dependent also on solution saturation state and hence R{sub p}. Allowing R{sub b} to vary as R{sub p}{sup 1/2}, consistent with available precipitation rate studies, produces a better fit to some trace element and isotopic data than a model where R{sub b} is constant. This model can account for most of the experimental data in the literature on the dependence of {sup 44}Ca/{sup 40}Ca and metal/Ca fractionation in calcite as a function of precipitation rate and temperature, and also accounts for {sup 18}O/{sup 16}O variations with some assumptions. The apparent temperature dependence of Ca isotope fractionation in calcite may stem from the dependence of R{sub b} on temperature; there should be analogous pH dependence at pH < 6. The proposed model may be valuable for predicting the behavior of isotopic and trace element fractionation for a range of elements of interest in low-temperature aqueous geochemistry. The theory presented is based on measureable thermo-kinetic parameters in contrast to models that equire hyper-fast diffusivity in near-surface layers of the solid.

DePaolo, D.

2010-10-15T23:59:59.000Z

49

Zero-order trace element distribution model for the Great Plains Coal Gasification Plant: Topical report  

SciTech Connect

The Morgantown Energy Technology Center of the US DOE is developing a series for models of environmental systems. Both zero-order and detailed models are being developed. Detailed models are based on fundamental engineering principles and the use of detailed physical and chemical property data; reliance on empirical relationships and correlations is minimized. The key advantage of detailed models is their predictive capabilities and utility in performing valid comparative analyses. An important prerequisite to the development of detailed models in the availability of representative, long-term process and environmental data. These data are needed both to develop the models as well as to validate them. Zero-order models are less rigorous and have less predictive capability than detailed models since they are based on empirical estimates and simple correlations. However, they can be developed relatively quickly and are significantly less expensive to develop and use compared to detailed models. Zero-order models are useful in identifying potential environmental or control technology problems. As such, they can help direct future research and development efforts. They can provide useful information when comprehensive data are unavailable for detailed modeling, and can be used as a screening tool to identify process alternatives which appear to warrant more detailed modeling. This report describes a zero-order trace element distribution model for the Great Plains Coal Gasification Plant located near Beulah, North Dakota. The model estimates how trace elements entering the plant in the feed coal are distributed to the plant's process and waste streams. Elements that may be introduced to the plant's waste streams from sorbents and/or catalysts (e.g., Vanadium in makeup Stretford solution) are not considered in the model. 13 refs.

Thomas, W.C.; Page, G.C.; Magee, R.A.

1987-04-01T23:59:59.000Z

50

The application of a synchrotron radiation microprobe to trace element analysis  

SciTech Connect

Synchrotron radiation is light emitted by electrons when accelerated in a circular orbit. Properties of synchrotron radiation important to trace element analysis by x-ray fluorescence analysis include a broad, continuous and tunable energy spectrum for K- and L-shell excitation of all elements; a linearly polarized source reducing the scattered radiation backgrounds; low energy deposition in the target; and an appreciable flux in narrow energy bandwidths for chemical speciation. Experiments to date have generally used ''white'' continuous spectra with a low energy absorber and no focussing, but future runs will use focussing mirrors which increase intensities by a factor of more than 1000. Monochromators will be used to select the energy and bandwidths appropriate to the experiment. Detection limits for thin biomedical samples using a solid-state detector, a 0.5 mm beam and a 5 min counting interval were in the range of 30 ppB for calcium to 50 ppB for zinc. A prototype wet cell was designed, constructed and tested using cat cardiac myocytes with the result that major trace elements such as iron could be quantitated in single myocytes. The x-ray microprobe was used to localize gallium in fetal rat bone explants after being cultured in BGJ media containing 25 ..mu..M Ga(NO/sub 3/)/sub 3/. The high brightness of x rays from a synchrotron source makes possible the development of computerized tomography on a micrometer scale. A tomogram of a freeze-dried caterpillar head was produced in a 50 min scan. The pixel size was 30 ..mu..m using a 20-..mu..m beam. 2 refs., 1 fig.

Gordon, B.M.; Hanson, A.L.; Jones, K.W.; Kwiatek, W.M.; Long, G.J.; Pounds, J.G.; Schidlovsky, G.; Spanne, P.; Rivers, M.L.; Sutton, S.R.

1987-01-01T23:59:59.000Z

51

High precision trace element and organic constituent analysis of oil shale and solvent-refined coal materials  

DOE Green Energy (OSTI)

The application of a number of sensitive and precise methods for the determination of trace elements, heavy element species and organic compounds in materials from an oil shale research retort process and from a solvent-refined coal pilot plant operation are discussed. The methods were chosen both for their sensitivity, and also for their relative freedom from interference effects. Coal liquids contain much higher concentrations of aromatic compounds, including polynuclear aromatic hydrocarbons (PNA's). A larger relative fraction of the pna's in shale oil are alkyl substituted. Coal liquids are also considerably higher in phenols (28 percent) than is shale oil (2 percent). N-heterocyclics are present in higher concentration (greater than 8 percent) in shale oil due to the high nitrogen content of the raw shale. Hydroaromatics are common in coal liquids but negligible in shale oil. Inorganic elements and speciation measurements indicate significant amounts of the toxic heavy elements Hg, As, Zn, and Se in effluent oil water and gas streams. In addition, the process water contains significant Co, Br, Sb, and U. Raw oil shale is highly enriched in Se, As and Sb and somewhat enriched in U, Pb, Cs, Hg and Zn. Solvent-refined coal liquids were found to be relatively low in most trace elements. The majority of trace elements are concentrated by the process into the mineral residue. Only Br and Hg are not depleted in solvent-refined coal. Other trace elements still remaining in significant amounts are U, Ta, Cr, and Zn.

Fruchter, J.S.; Petersen, M.R.; Laul, J.C.; Ryan, P.W.

1976-11-01T23:59:59.000Z

52

Problems of trace-element ratios and geothermometry in a gravel geothermal-aquifer system  

DOE Green Energy (OSTI)

The system studied is a Tertiary-age, block-faulted basin in which a Pleistocene gravel bed acts as a confined aquifer and permits the lateral dispersion of the geothermal fluids. Vertical movement of the hot water is currently believed to be controlled by faults on the east side of the valley. An aerial magnetic anomaly and a Bouguer gravity anomaly appear to correspond with thoese eastern faults. Basic data on the geology and trace element halos has been presented previously. Evaluation of the mixing phenomena in this system was attempted using a dissolved silica-enthalpy graph. A chalcedony curve is also plotted. An enthalpy versus chloride plot, suggests that either conductive cooling occurs before mixing or that higher chloride content background waters are available for mixing. (MHR)

Sonderegger, J.L.; Donovan, J.J.

1982-01-01T23:59:59.000Z

53

Conversion of the trace elements Zn, Cd, and Pb in the combustion of near-Moscow coals  

SciTech Connect

A model for the conversion of trace elements in the combustion of near-Moscow coals based on a complex approach combining the capabilities of geochemistry, chemical thermodynamics, phase analysis, and chemical kinetics is proposed. The conversion of the trace elements Zn, Cd, and Pb as the constituents of near-Moscow coal in the flow of coal combustion products along the line of the P-59 boiler at the Ryazanskaya Thermal Power Plant was calculated. Experimental data were used in the development of the model and in calculations.

E.V. Samuilov; L.N. Lebedeva; L.S. Pokrovskaya; M.V. Faminskaya [OAO Power Engineering Institute, Moscow (Russia)

2008-10-15T23:59:59.000Z

54

Speciation of Trace Elements in Biological and Environmental Samples by X-ray Absorption Spectroscopy: The Role of Plants and Microbes in Remediation  

Science Conference Proceedings (OSTI)

Plants can accumulate, detoxify, and transform trace elements present in contaminated soil and water, leading to the phytoremediation of contaminated sites. An important factor for consideration is the chemical form of trace elements accumulated in tissues of different plant species used for phytoremediation. This report describes the use of X-ray absorption spectroscopy (XAS) for successfully determining the speciation of trace elements in biological and environmental samples.

2001-11-21T23:59:59.000Z

55

Feasibility of the detection of trace elements in particulate matter using online High-Resolution Aerosol Mass Spectrometry  

SciTech Connect

The feasibility of using an online thermal-desorption electron-ionization high-resolution aerosol mass spectrometer (AMS) for the detection of particulate trace elements was investigated analyzing data from Mexico City obtained during the MILAGRO 2006 field campaign, where relatively high concentrations of trace elements have been reported. This potential application is of interest due to the real-time data provided by the AMS, its high sensitivity and time resolution, and the widespread availability and use of this instrument. High resolution mass spectral analysis, isotopic ratios, and ratios of different ions containing the same elements are used to constrain the chemical identity of the measured ions. The detection of Cu, Zn, As, Se, Sn, and Sb is reported. There was no convincing evidence for the detection of other trace elements commonly reported in PM. The elements detected tend to be those with lower melting and boiling points, as expected given the use of a vaporizer at 600oC in this instrument. Operation of the AMS vaporizer at higher temperatures is likely to improve trace element detection. The detection limit is estimated at approximately 0.3 ng m-3 for 5-min of data averaging. Concentration time series obtained from the AMS data were compared to concentration records determined from offline analysis of particle samples from the same times and locations by ICP (PM2.5) and PIXE (PM1.1 and PM0.3). The degree of correlation and agreement between the three instruments (AMS, ICP, and PIXE) varied depending on the element. The AMS shows promise for real-time detection of some trace elements, although additional work including laboratory calibrations with different chemical forms of these elements are needed to further develop this technique and to understand the differences with the ambient data from the other techniques. The trace elements peaked in the morning as expected for primary sources, and the many detected plumes suggest the presence of multiple point sources, probably industrial, in Mexico City which are variable in time and space, in agreement with previous studies.

Salcedo, D.; Laskin, Alexander; Shutthanandan, V.; Jimenez, Jose L.

2012-08-10T23:59:59.000Z

56

Accumulation of trace elements and growth responses in Corbicula fluminea downstream of a coal-fired power plant  

E-Print Network (OSTI)

Accumulation of trace elements and growth responses in Corbicula fluminea downstream of a coal 2009 Keywords: Corbicula fluminea Coal-fired power plant Selenium Mercury Glutathione Condition index Bioaccumulation a b s t r a c t Lentic organisms exposed to coal-fired power plant (CFPP) discharges can have

Hopkins, William A.

57

www.elsevier.com/locate/fuel Trace elements in coal derived liquids: analysis by ICP-MS and  

E-Print Network (OSTI)

Concentrations of trace elements in coal derived liquids have been investigated by inductively coupled plasma-mass spectrometry (ICP-MS) and by Mssbauer spectroscopy. Liquefaction extracts prepared from the Argonne Premium Coals and a coal tar pitch have been examined. Microwave digestion in concentrated nitric acid has been shown as a suitable method for determining trace element concentrations in coal derived liquids by ICP-MSfor sample sizes as small as 320 mg. High concentrations of Fe were found for all extract samples (?2651474 ppm). Ti, Cr, Mn, Co, Ga, Sb, Cs and Ba were measurable. Concentration distributions of trace elements found in the extracts bore little relation to the corresponding distributions in the original coals. The proportions of individual trace elements present in the original coals and found in the extracts, varied widely. Mssbauer spectroscopy of the extracts indicated that the high Fe-concentrations corresponded to the presence of organometallic-Fe compoundsand not to pyritic iron. There is evidence suggesting the presence of material derived from iron-storage proteins such as ferritin, but final proof is lacking. Our data suggest that other metallic ions detected in these coal derived liquids may be present in association with the organic material. Concentrations of paramagnetic metal species were found to be of the same order of magnitude as ESR spin-densities already found in coal liquids. Both types of paramagnetic species are suspected of causing loss of signal in

Mssbauer Spectroscopy; R. Richaud A; H. Lachas A; M. -j. Lazaro A; L. J. Clarke B; K. E. Jarvis B; A. A. Herod A; T. C. Gibb C; R. Kandiyoti A

1999-01-01T23:59:59.000Z

58

Trace element and isotope geochemistry of geothermal fluids, East Rift Zone, Kilauea, Hawaii  

DOE Green Energy (OSTI)

A research program has been undertaken in an effort to better characterize the composition and the precipitation characteristic of the geothermal fluids produced by the HGP-A geothermal well located on the Kilauea East Rift Zone on the Island of Hawaii. The results of these studies have shown that the chemical composition of the fluids changed over the production life of the well and that the fluids produced were the result of mixing of at least two, and possibly three, source fluids. These source fluids were recognized as: a sea water composition modified by high temperature water-rock reactions; meteoric recharge; and a hydrothermal fluid that had been equilibrated with high temperature reservoir rocks and magmatic volatiles. Although the major alkali and halide elements show clearly increasing trends with time, only a few of the trace transition metals show a similar trend. The rare earth elements, were typically found at low concentrations and appeared to be highly variable with time. Studies of the precipitation characteristics of silica showed that amorphous silica deposition rates were highly sensitive to fluid pH and that increases in fluid pH above about 8.5 could flocculate more than 80% of the suspended colloidal silica in excess of its solubility. Addition of transition metal salts were also found to enhance the recovery fractions of silica from solution. The amorphous silica precipitate was also found to strongly scavenge the alkaline earth and transition metal ions naturally present in the brines; mild acid treatments were shown to be capable of removing substantial fractions of the scavenged metals from the silica flocs yielding a moderately pure gelatinous by-product. Further work on the silica precipitation process is recommended to improve our ability to control silica scaling from high temperature geothermal fluids or to recover a marketable silica by-product from these fluids prior to reinjection.

West, H.B.; Delanoy, G.A.; Thomas, D.M. (Hawaii Univ., Honolulu, HI (United States). Hawaii Inst. of Geophysics); Gerlach, D.C. (Lawrence Livermore National Lab., CA (United States)); Chen, B.; Takahashi, P.; Thomas, D.M. (Hawaii Univ., Honolulu, HI (United States) Evans (Charles) and Associates, Redwood City, CA (United States))

1992-01-01T23:59:59.000Z

59

Trace elements in oil shale. Progress report, June 1, 1976--May 31, 1977  

DOE Green Energy (OSTI)

A substantial number of samples of water, stream sediment, soils, plants, oil shale, spent shale, shale oil and other materials were collected for analyses. A considerable amount of effort was also involved in the development and validation of methods for preparing and analyzing these samples for trace element content. Among the results are: Cu, Li, and Zn exhibit well-defined trends in soils over the Piceance Basin, with values increasing from north to south; As, Mo, B, and Se are all elevated in the soils of the Piceance Basin; Mo and B are more soluble in TOSCO spent shale than in unprocessed shale and are also elevated in plants growing on spent shale; F is less soluble in spent (TOSCO) shale than in unprocessed oil shale, but although the levels in leachates are quite significant (25 mg/l). F is not readily leached out; and As and Se are not very soluble in spent shale (TOSCO) and are not taken up to a significant extent by plants.

Not Available

1977-02-01T23:59:59.000Z

60

Washability of trace elements in product coals from Illinois mines. Technical report, 1 December 1993--28 February 1994  

DOE Green Energy (OSTI)

The existing trace element washability data on Illinois coals are based on float-sink methods, and these data are not applicable to modern froth flotation or column flotation processes. Particularly, there is a lack of washability data on samples from modern preparation plants, as well as other product (as-shipped) coals. The goal of this project is to provide the needed trace element washability data on as-shipped coals that were collected during 1992--1993 from Illinois mines. During the second quarter, froth flotation/release analysis (FF/RA) tests on 34 project samples were completed at {minus}100, {minus}200, and {minus}400 mesh particle sizes. Products from the FF/RA tests were analyzed for ash, moisture, and some for total S and heating value (BTU), and the resulting data are being used to construct a series of washability curves. For example, these curves can show variation in BTU or combustible recovery as a function of the amount of ash or S rejected. Composite samples, each having 80% of the total BTU (or combustibles), were prepared for the {minus}100 and {minus}200 mesh FF/RA tests and submitted for trace element analysis. The composite samples for the {minus}400 mesh FF/RA tests will be submitted soon, and the analytical results are expected to be available in 3--4 months. The trace element data on the composite samples will indicate the potential for the removal of each element from the coals at the chosen flotation conditions and particle sizes.

Demir, I.; Ruch, R.R.; Harvey, R.D.; Steele, J.D.; Khan, S. [Illinois State Geological Survey, Champaign, IL (United States)

1994-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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61

Method for quantitative determination and separation of trace amounts of chemical elements in the presence of large quantities of other elements having the same atomic mass  

DOE Patents (OSTI)

Photoionization via autoionizing atomic levels combined with conventional mass spectroscopy provides a technique for quantitative analysis of trace quantities of chemical elements in the presence of much larger amounts of other elements with substantially the same atomic mass. Ytterbium samples smaller than 10 ng have been detected using an ArF* excimer laser which provides the atomic ions for a time-of-flight mass spectrometer. Elemental selectivity of greater than 5:1 with respect to lutetium impurity has been obtained. Autoionization via a single photon process permits greater photon utilization efficiency because of its greater absorption cross section than bound-free transitions, while maintaining sufficient spectroscopic structure to allow significant photoionization selectivity between different atomic species. Separation of atomic species from others of substantially the same atomic mass is also described.

Miller, C.M.; Nogar, N.S.

1982-09-02T23:59:59.000Z

62

High precision trace element and organic constituent analysis of oil shale and solvent-refined coal materials  

DOE Green Energy (OSTI)

Broad spectrum inorganic and organic analytical techniques provide the best approach for the initial characterization of the complex samples encountered in working with new energy technologies such as oil shale retorting and solvent refining of coal. In complex samples, analyses are facilitated by techniques, such as neutron activation and x-ray fluorescence, that are relatively insensitive to matrix effects. A comparative organic constituent analysis of the crude shale oil and coal liquid samples analyzed in this study showed that the coal liquids contained higher concentrations of aromatic compounds including polynuclear aromatic hydrocarbons. The coal liquids were considerably richer in phenols than was the shale oil. N-heterocyclics were present in higher concentration in shale oil due to the high nitrogen content of the raw shale. Hydroaromatics were found to be common in coal liquids but negligible in this shale oil. Measurable amounts of the heavy elements Hg, As, Zn, and Se were found in effluent streams from oil shale retorting. The process water also contained significant Co, Br, Sb, and U. The raw oil shale was enriched in Se, As and Sb and somewhat enriched in U, Pb, Cs, Hg, and Zn. Solvent-refined coal liquids were found to be relatively low in most trace elements. Most were concentrated in the mineral residue. Only Br was not depleted in solvent-refined coal. Other trace elements remaining in significant amounts were U, Ta, Cr and Zn. We have not yet measured the trace elements and gaseous and particulate samples from the solvent-refined coal plant. 10 tables.

Fruchter, J.S.; Laul, J.C.; Petersen, M.R.; Ryan, P.W.

1977-03-01T23:59:59.000Z

63

Real-Time Measurements of Engine-Out Trace Elements: Application of a Novel Soot Particle Aerosol Mass Spectrometer for Emissions Characterization  

E-Print Network (OSTI)

Lubricant-derived trace element emissions are the largest contributors to the accumulation of incombustible ash in diesel particulate filters (DPF), eventually leading to filter plugging and an increase in engine fuel ...

Cross, Eben Spencer

64

JV Task-123 Determination of Trace Element Concentrations at an Eastern Bituminous Coal Plant Employing an SCR and Wet FGD  

SciTech Connect

The Energy & Environmental Research Center (EERC), in partnership with Babcock & Wilcox (B&W) and with funding from U.S. Department of Energy (DOE), conducting tests to prove that a high level of mercury control (>90%) can be achieved at a power plant burning a high-sulfur eastern bituminous coal. With funding from the Electric Power Research Institute (EPRI), DOE, and Center for Air Toxic Metals{reg_sign} (CATM{reg_sign}) Affiliates Program, the EERC completed an additional sampling project to provide data as to the behavior of a number of trace elements across the various pollution control devices, with a special emphasis on the wet flue gas desulfurization (FGD) system. Results showed that the concentrations of almost all the elements of interest leaving the stack were very low, and a high percentage of the trace elements were captured in the electrostatic precipitator (ESP) (for most, >80%). Although, with a few exceptions, the overall mass balances were generally quite good, the mass balances across the wet FGD were more variable. This is most likely a result of some of the concentrations being very low and also the uncertainties in determining flows within a wet FGD.

Dennis Laudal

2008-05-01T23:59:59.000Z

65

Non-destructive determination of trace-element concentrations. Annual progress report, August 1979  

DOE Green Energy (OSTI)

Development and testing of the neutron-capture prompt ..gamma..-ray activation analysis method continued. A wide range of NBS Standard Reference Materials, USGS Standard Rocks, and other materials have been analyzed in order to identify elements whose lines can be observed, to determine interferences and detection limits for each important ..gamma.. ray of observable elements and to measure concentrations of observable elements for comparison with certified or other previous results. In most crustal samples, concentrations of 16 to 20 elements can be determined.

Gordon, G.E.; Zoller, W.H.; Walters, W.B.

1979-08-01T23:59:59.000Z

66

Baseline Concentrations of Radionuclides and Trace Elements in Soils and Vegetation around the DARHT Facility: Construction Phase (1998)  

Science Conference Proceedings (OSTI)

The Mitigation Action Plan for the Dual-Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory mandates the establishment of baseline concentrations for potential environmental contaminants. To this end, concentrations of {sup 3}H, {sup 137}Cs, {sup 90}Sr, {sup 238}Pu, {sup 239,240}Pu, {sup 241}Am, and {sup tot}U and Ag, As, Ba, Be, Cd, Cr, Cu, Hg, Ni, Pb, Sb, Se, and Tl were determined in surface and subsurface soils, sediments, and vegetation (overstory and understory) around the DARHT facility during the construction phase in 1998 (this is the third of a four year baseline study). Also, volatile (VOC) and semivolatile (SVOC) organic compounds were measured in soils and sediments. Most radionuclides and trace metals in soil, sediment, and vegetation were similar to past years at DARHT and were within regional background concentrations. Exceptions were concentrations of {sup 90}Sr, Be, Ba, and total U in some samples--these elements exceeded upper limit regional background concentrations (e.g., >mean plus two std dev). No VOCs and very few SVOCs were detected in soils and sediments at DARHT. Mean ({+-} std dev) radionuclide and trace element concentrations measured in soil, sediment, and vegetation summarized over a three-year period (construction phase) are summarized.

P. R. Fresquez; M. H. Ebinger; H. T. Haagenstad; L. Naranjo, Jr.

1999-12-01T23:59:59.000Z

67

Non-destructive determination of trace-element concentrations. Annual progress report  

DOE Green Energy (OSTI)

A beam port has been installed at the National Bureau of Standards (NBS) reactor by the University of Maryland group in cooperation with the NBS staff in order to initiate studies of a new analytical technique: neutron-capture prompt ..gamma..-ray activation analysis (PGAA). A detection system based on a large, high resolution Ge(Li) detector surrounded by NaI crystal has been developed for measurement of prompt ..gamma.. rays from 80 keV to 11 MeV. With a temporary external beam tube in place, neutron and ..gamma..-ray backgrounds were investigated prior to design and construction of a well-shielded beam tube and massive shielding for the detection system. With the backgrounds suitably low, it has been possible to investigate ..gamma..-ray spectra of a wide range of samples. These spectra are being carefully analyzed to identify species contributing the observed lines. Whenever an element's presence is suspected. Standards of the pure element or simple compounds are irradiated to determine its complete spectrum. This is necessary in order to determine which lines are useful for analytical purposes and which have interferences from other elements. From the results to date, it appears that PGAA will be able to measure the following elements in many types of samples: H, B, C, N, Na, Al, Si, S, Cl, K, Ca, Ti, V, Mn, Fe, Cd, Sm, and Gd. Many other elements will be measurable in certain classes of samples. Furthermore, the list of elements is incomplete, as not all lines have yet been identified in the spectra. The quantitative application of the method is being tested using a wide range of NBS Standard Reference Materials whose elemental compositions are well characterized. Measurements are reported for about fourteen elements in several standards. In general, the agreement with previous measurements is quite good.

Gordon, G.E.; Zoller, W.H.; Walters, W.B.

1978-08-01T23:59:59.000Z

68

Biological processes for concentrating trace elements from uranium mine waters. Technical completion report  

Science Conference Proceedings (OSTI)

Waste water from uranium mines in the Ambrosia Lake district near Grants, New Mexico, USA, contains uranium, selenium, radium and molybdenum. The Kerr-McGee Corporation has a novel treatment process for waters from two mines to reduce the concentrations of the trace contaminants. Particulates are settled by ponding, and the waters are passed through an ion exchange resin to remove uranium; barium chloride is added to precipitate sulfate and radium from the mine waters. The mine waters are subsequently passed through three consecutive algae ponds prior to discharge. Water, sediment and biological samples were collected over a 4-year period and analyzed to assess the role of biological agents in removal of inorganic trace contaminants from the mine waters. Some of the conclusions derived from this study are: (1) The concentrations of soluble uranium, selenium and molybdenum were not diminished in the mine waters by passage through the series of impoundments which constituted the mine water treatment facility. Uranium concentrations were reduced but this was due to passage of the water through an ion exchange column. (2) The particulate concentrations of the mine water were reduced at least ten-fold by passage of the waters through the impoundments. (3) The sediments were anoxic and enriched in uranium, molybdenum and selenium. The deposition of particulates and the formation of insoluble compounds were proposed as mechanisms for sediment enrichment. (4) The predominant algae of the treatment ponds were the filamentous Spirogyra and Oscillatoria, and the benthic alga, Chara. (5) Adsorptive processes resulted in the accumulation of metals in the algae cells. (6) Stimulation of sulfate reduction by the bacteria resulted in retention of molybdenum, selenium, and uranium in sediments. 1 figure, 16 tables.

Brierley, C.L.; Brierley, J.A.

1981-12-01T23:59:59.000Z

69

Quantifying the availability and the stability of trace cationic elements in fly ash  

E-Print Network (OSTI)

-Products Associated with Coal Mining Interactive Forum: Southern Illinois University at Carbondale, Carbondale, IL in this paper to deter- mine these parameters for model elements Cu(II), Cd(II), and Ni(II) in fly ash 50 mM EDTA extraction. ? 2006 Elsevier Ltd. All rights reserved. 1. Introduction Coal fly ash has

Ragsdell, Kenneth M.

70

Control of Gas Tungsten Arc welding pool shape by trace element addition to the weld pool  

DOE Patents (OSTI)

An improved process for Gas Tungsten Arc welding maximizes the depth/width ratio of the weld pool by adding a sufficient amount of a surface active element to insure inward fluid flow, resulting in deep, narrow welds. The process is especially useful to eliminate variable weld penetration and shape in GTA welding of steels and stainless steels, particularly by using a sulfur-doped weld wire in a cold wire feed technique.

Heiple, C.R.; Burgardt, P.

1984-03-13T23:59:59.000Z

71

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

produce oil, in various gas, bitumen, and C quantities andquantity of each element distributed among the products and Elements in the oilOil shales contain organic material in a mineral matrix which includes significant environmentally As, quantities

Fox, J. P.

2011-01-01T23:59:59.000Z

72

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

elements. Over 25% of the raw shale gas five groups productsthe oil, in the raw oil shale gas, consequence of retortinggood product raw oil shale and input gases that is accounted

Fox, J. P.

2011-01-01T23:59:59.000Z

73

Uncertainty Measurement for Trace Element Analysis of Uranium and Plutonium Samples by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)  

Science Conference Proceedings (OSTI)

The measurement uncertainty estimatino associated with trace element analysis of impurities in U and Pu was evaluated using the Guide to the Expression of Uncertainty Measurement (GUM). I this evalution the uncertainty sources were identified and standard uncertainties for the components were categorized as either Type A or B. The combined standard uncertainty was calculated and a coverage factor k = 2 was applied to obtain the expanded uncertainty, U. The ICP-AES and ICP-MS methods used were deveoped for the multi-element analysis of U and Pu samples. A typical analytical run consists of standards, process blanks, samples, matrix spiked samples, post digestion spiked samples and independent calibration verification standards. The uncertainty estimation was performed on U and Pu samples that have been analyzed previously as part of the U and Pu Sample Exchange Programs. Control chart results and data from the U and Pu metal exchange programs were combined with the GUM into a concentration dependent estimate of the expanded uncertainty. Comparison of trace element uncertainties obtained using this model was compared to those obtained for trace element results as part of the Exchange programs. This process was completed for all trace elements that were determined to be above the detection limit for the U and Pu samples.

Gallimore, David L. [Los Alamos National Laboratory

2012-06-13T23:59:59.000Z

74

Trace element and REE composition of five samples of the Yucca Mountain calcite-silica deposits. Special report No. 8  

SciTech Connect

The attached materials document the results of part of a recent effort of geochemical sampling and analysis at Yucca Mountain and nearby regions. The efforts come as a result of interest in comprehensive analyses of rare earth elements (REE), lanthanum (La) through lutecium (Lu). Several additional, non-REE analyses were obtained as well. Commercially available REE analyses have proved to be insufficiently sensitive for geochemical purposes. Dr. Roman Schmitt at the Radiation Center at Oregon State University in Corvallis was sent five samples as a trial effort. The results are very encouraging. The purpose of compiling Dr. Schmitt`s report and the other materials is to inform the sponsor of his independent observations of these results and other information that sent to him. To provide a more complete appreciation of the utility of REE analyses a copy of Dave Vaniman`s recent article is included in which he notes that REE analyses from Yucca Mountain indicate the occurrence of two distinctly different REE patterns as do several other chemical parameters of the calcite-silica deposits. Our four samples with high equivalent CaCO{sub 3} were collected from sites we believe to be spring deposits. One sample, 24D, is from southern Crater Flat which is acknowledged by U.S.G.S. investigators to be a spring deposit. All four of these samples have REE patterns similar to those from the saturated zone reported by Vaniman.

Livingston, D.

1993-07-01T23:59:59.000Z

75

Trace metal transformation in gasification  

SciTech Connect

The Energy & Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to 1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems, 2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions, and 3) identify methods to control trace element emissions.

Benson, S.A.; Erickson, T.A.; Zygarlicke, C.J.; O`Keefe, C.A.; Katrinak, K.A.; Allen, S.E.; Hassett, D.J.; Hauserman, W.B. [North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center; Holcombe, N.T. [USDOE Morgantown Energy Technology Center, WV (United States)

1996-12-31T23:59:59.000Z

76

Trace metal transformations in gasification  

SciTech Connect

The Energy & Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to (1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems, (2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions, and (3) identify methods to control trace element emissions.

Benson, S.; Erickson, T.A.; Zygarlicke, C.J. [and others

1995-12-01T23:59:59.000Z

77

Hydrogen sulfide, trace element and sulfur hexafluoride tracer treatment from the Geysers-Calistoga Geothermal Resource Area based on aircraft and surface sampling  

DOE Green Energy (OSTI)

This four-day study has provided initial data regarding the short-range transport of pollutants from The Geysers geothermal operations. The initial analysis of the data has shown that a measureable plume of gaseous sulfur (H{sub 2}S) is emitted from the Geysers and transported by surface and upper-level winds to distances beyond 20 km. Only one day had concentrations above 30 ppB and on this day H{sub 2}S was detected as a distinct odor at 1500 m (m.s.1.) at 4 km or more from the Geysers. The initial data analysis of the H{sub 2}S and SF{sub 6} plume data have revealed the important role that vertical wind shear plays in changing plume trajectories with height and enhancing diffusion of pollutants. Surface and aircraft sampling of aerosols indicate that small quantities of trace elements such as As, Cd, Hg, Pb, Cr and Br may be transported from the area.

Orgill, M.M.; Lee, R.N.; Nickola, P.W.; Schreck, R.C.

1983-05-01T23:59:59.000Z

78

Abstracts from a workshop on processes determining the input, behavior and fate of radionuclides and trace elements in continental shelf environments  

Science Conference Proceedings (OSTI)

Abstracts of workshop presentations concerning input, behavior, and fate of trace metals and radionuclides in the marine system are presented. (ACR)

Not Available

1980-03-01T23:59:59.000Z

79

Uranium Trace Elements Erik Hunter  

E-Print Network (OSTI)

be made. The electroscope relied upon the ability of the gamma radiation emitted by the sample to ionize that prove anomalous in the field can be subjected to more accurate tests in the lab that will determine #12;associated with the device was reported to be +/- 4% of the actual uranium content in the sample

80

Neogene Low-latitude Seasonal Environmental Variations: Stable Isotopic and Trace Elemental Records in Mollusks from the Florida Platform and the Central American Isthmus  

E-Print Network (OSTI)

This Ph.D. dissertation integrates stable isotope and trace element geochemistry in modern and fossil gastropod shells to study low-latitude marine paleoenvironments. First, stable isotopes (delta18O and delta13C) and Sr/Ca ratios are used to examine low-latitude temperature and salinity variations recorded in Plio-Pleistocene (3.5-1.6 Ma) fossils from western Florida during periods of high-latitude warming and "global" cooling. The middle Pliocene Pinecrest Beds (Units 7 and 4) and the overlaying Plio-Pleistocene Caloosahatchee Formation generate significantly different delta18O-derived paleotemperatures but identical Sr/Ca ratios. High delta18O values, together with low delta13C values and brackish fauna, indicate that Unit 4 was deposited in a lagoonal environment similar to modern Florida Bay. In contrast, relatively low delta18O and high delta13C values in Unit 7 and Caloosahatchee Formation represent deposition in an open-marine environment. The observed Unit 7 and Caloosahatchee paleotemperatures are inconsistent with middle Pliocene warming event, but consistent with the Plio-Pleistocene cooling trend. To quantify modern upwelling and freshening signals and contrast these signals between the tropical eastern Pacific (TEP) and southwestern Caribbean (SWC), methodologies are developed for reconstructing seasonal upwelling and freshening patterns from modern tropical gastropod shells from Panama using: 1) paired oxygen and carbon isotopic profiles and delta18O-delta13C (delta-delta) correlations, and 2) deviation from baseline delta18O values that represent conditions free of seasonal upwelling or freshening influences. Shell delta18O values normalized to the baseline faithfully record modern conditions of little or no upwelling in SWC and Gulf of Chiriqui, and strong upwelling in the Gulf of Panama, as well as strong freshwater input in most areas. The baseline and delta-delta methods are applied to identify and quantify changes in upwelling and freshening in the Neogene TEP and SWC seawaters associated with the final closure of Central American Isthmus. The records reveal significant upwelling in late Miocene SWC and mid Pliocene TEP waters, strong freshening in SWC waters from 5.7-2.2 Ma, and minimal seasonal upwelling and/or freshening variations in Plio-Pleistocene SWC waters. The reconstructed paleotemperatures agree with the global cooling trend through the late Miocene, but lack evidence for middle Pliocene warming or late Neogene global cooling.

Tao, Kai

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Trace Evidence  

Science Conference Proceedings (OSTI)

... Work with national and international ... 00 Optional Open House and Trace Analysis Lab Tours of ... Ethanol in Water Standard Reference Materials to ...

2012-12-06T23:59:59.000Z

82

Removal of pyrite and trace elements from waste coal by dissolved-CO{sub 2} flotation and chelating agents. [Quarterly] technical report, December 1, 1993--February 28, 1994  

SciTech Connect

In dissolved-CO{sub 2} flotation, ultrafine -bubbles are generated by CO{sub 2} dissolved in water. The ultrafine bubbles have the potential to improve the separation efficiency in fine coal cleaning. Chemicals will be used prior to or during dissolved-CO{sub 2} flotation to improve the separation efficiency-CO{sub 2} of pyrite and other minerals including trace metals from coal. Chelating agent will be applied to clean coal to further reduce the trace metals from coal. During this period, a 3 in. diameter packed column has been purchased and installed. This column was then modified for use in dissolved-CO{sub 2} flotation. Coal samples of Illinois No. 6 coal are being prepared for flotation. Preliminary flotation tests were performed on Illinois No. 6 waste coal.

Shiao, S.Y. [Babcock and Wilcox Company (United States)

1994-08-01T23:59:59.000Z

83

Removal of pyrite and trace elements from waste coal by dissolved- CO{sub 2} flotation and chelating agents. Technical report, September 1, 1993--November 30, 1993  

SciTech Connect

In dissolved-CO{sub 2} flotation, ultrafine bubbles are generated by CO{sub 2} dissolved in water. The ultrafine bubbles have the potential to improve the separation efficiency in fine coal cleaning. Chemicals will be used prior to or during dissolved-CO{sub 2} flotation to improve the separation efficiency of pyrite and other minerals including trace metals from coal. Chelating agents will be applied to clean coal to further reduce the trace metals from coal. During this period, the project planning has begun. A 3in.-diameter packed column has been ordered. This column will be modified for use in dissolved-CO{sub 2} flotation. Clean and waste coal samples of Illinois No. 6 coal have been scheduled to be picked up from Ohio Coal Testing and Development (OCTAD) facility.

Shiao, S.Y. [Babcock and Wilcox Co., Alliance, OH (United States)

1993-12-31T23:59:59.000Z

84

Provenance Traces  

E-Print Network (OSTI)

Provenance is information about the origin, derivation, ownership, or history of an object. It has recently been studied extensively in scientific databases and other settings due to its importance in helping scientists judge data validity, quality and integrity. However, most models of provenance have been stated as ad hoc definitions motivated by informal concepts such as "comes from", "influences", "produces", or "depends on". These models lack clear formalizations describing in what sense the definitions capture these intuitive concepts. This makes it difficult to compare approaches, evaluate their effectiveness, or argue about their validity. We introduce provenance traces, a general form of provenance for the nested relational calculus (NRC), a core database query language. Provenance traces can be thought of as concrete data structures representing the operational semantics derivation of a computation; they are related to the traces that have been used in self-adjusting computation, but differ in impor...

Cheney, James; Ahmed, Amal

2008-01-01T23:59:59.000Z

85

It's Elemental - The Element Indium  

NLE Websites -- All DOE Office Websites (Extended Search)

Cadmium Cadmium Previous Element (Cadmium) The Periodic Table of Elements Next Element (Tin) Tin The Element Indium [Click for Isotope Data] 49 In Indium 114.818 Atomic Number: 49 Atomic Weight: 114.818 Melting Point: 429.75 K (156.60°C or 313.88°F) Boiling Point: 2345 K (2072°C or 3762°F) Density: 7.31 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 5 Group Number: 13 Group Name: none What's in a name? Named after the bright indigo line in its spectrum. Say what? Indium is pronounced as IN-dee-em. History and Uses: Indium was discovered by the German chemists Ferdinand Reich and Hieronymus Theodor Richter in 1863. Reich and Richter had been looking for traces of the element thallium in samples of zinc ores. A brilliant indigo line in

86

A portable optical emission spectroscopy-cavity ringdown spectroscopy dual-mode plasma spectrometer for measurements of environmentally important trace heavy metals: Initial test with elemental Hg  

SciTech Connect

A portable optical emission spectroscopy-cavity ringdown spectroscopy (OES-CRDS) dual-mode plasma spectrometer is described. A compact, low-power, atmospheric argon microwave plasma torch (MPT) is utilized as the emission source when the spectrometer is operating in the OES mode. The same MPT serves as the atomization source for ringdown measurements in the CRDS mode. Initial demonstration of the instrument is carried out by observing OES of multiple elements including mercury (Hg) in the OES mode and by measuring absolute concentrations of Hg in the metastable state 6s6p {sup 3}P{sub 0} in the CRDS mode, in which a palm-size diode laser operating at a single wavelength 405 nm is incorporated in the spectrometer as the light source. In the OES mode, the detection limit for Hg is determined to be 44 parts per 10{sup 9} (ppb). A strong radiation trapping effect on emission measurements of Hg at 254 nm is observed when the Hg solution concentration is higher than 50 parts per 10{sup 6} (ppm). The radiation trapping effect suggests that two different transition lines of Hg at 253.65 nm and 365.01 nm be selected for emission measurements in lower (<50 ppm) and higher concentration ranges (>50 ppm), respectively. In the CRDS mode, the detection limit of Hg in the metastable state 6s6p {sup 3}P{sub 0} is achieved to be 2.24 parts per 10{sup 12} (ppt) when the plasma is operating at 150 W with sample gas flow rate of 480 mL min{sup -1}; the detection limit corresponds to 50 ppm in Hg sample solution. Advantage of this novel spectrometer has two-fold, it has a large measurement dynamic range, from a few ppt to hundreds ppm and the CRDS mode can serve as calibration for the OES mode as well as high sensitivity measurements. Measurements of seven other elements, As, Cd, Mn, Ni, P, Pb, and Sr, using the OES mode are also carried out with detection limits of 1100, 33, 30, 144, 576, 94, and 2 ppb, respectively. Matrix effect in the presence of other elements on Hg measurements has been found to increase the detection limit to 131 ppb. These elements in lower concentrations can also be measured in the CRDS mode when a compact laser source is available to be integrated into the spectrometer in the future. This exploratory study demonstrates a new instrument platform using an OES-CRDS dual-mode technique for potential field applications.

Sahay, Peeyush; Scherrer, Susan T.; Wang Chuji [Department of Physics and Astronomy, Mississippi State University, Starkville, Mississippi 39759 (United States)

2012-09-15T23:59:59.000Z

87

Mercury and Other Trace Metals in Coal  

Science Conference Proceedings (OSTI)

This document summarizes the trace metal analyses of more than 150 as-received bituminous, sub-bituminous, and lignite coal samples from full-scale power plants. Analyses for mercury, arsenic, beryllium, cadmium, chromium, copper, nickel, and lead offer a benchmark for utilities to compare and contrast their own estimates and measurements of trace element content in coal.

1997-02-25T23:59:59.000Z

88

Formulated 2-Traces - CECM  

E-Print Network (OSTI)

Nov 19, 1997 ... next up previous. Next: Characteristics of truth tables Up: Introduction to Traces Previous: Definition of the n-Trace...

89

Trace elements and Polycyclic Aromatic Hydrocarbons (PAHs)  

E-Print Network (OSTI)

.2.2 Anthropogenic emissions 28 2.3 Polycyclic Aromatic Hydrocarbons 30 2.3.1 Sources of PAHs 30 2.3.2 Gas to particle distribution in atmosphere 32 2.3.3 Gas to particle distribution in atmosphere 32 CHAPTER THREE

Paris-Sud XI, Université de

90

Trace elements in the aluminum value chain  

Science Conference Proceedings (OSTI)

Retrofit of a Combined Breaker Feeder with a Chisel Bath Contact Detection System to Reduce Anode Effect Frequency in a Potroom Simulating Traffic in a...

91

DEPOSITION OF TOXIC TRACE ELEMENTS AND HEAVY ...  

Science Conference Proceedings (OSTI)

... on sub-micrometer (ie, fine) particles was emitted from oil-fired power plants. Likewise, sele- nium is a marker of coal combustion particles; Zn ...

1999-06-25T23:59:59.000Z

92

Trace Element Analysis Core Lab methods  

E-Print Network (OSTI)

), Hg and Pb (no gas mode). Selenium and Fe are analysed in collision mode with H2. The sample strem a weighed sample is placed in either a 15 ml or 50 ml centrifuge tube and an appropriate volume of optima analysis is performed in the 15 ml centrifuge tubes with addition of 0.5 mls HNO3. For sediment/soils 0

Lotko, William

93

Trace species emissions for IGFC  

SciTech Connect

The objectives of this investigation are to study both the fate and distribution of at least five significant, coal-derived trace elements commonly present in coal-gas, in terms of their vaporization during gasification, their condensation and sorption during hot-gas cleanup, as well as their effects on fuel cells, gas turbines, and ultimately the environment. The definition here of trace does not include the major contaminants of sulfur and chlorine, etc., although the simultaneous presence of such major species is always considered in our thermochemical calculations. Of course, many other elements can vaporize in trace quantities from raw coal as either volatile, molecular compounds or as metallic vapors which, besides their deleterious action on the energy conversion systems, can also be detrimental to plant and animal life when emitted into the atmosphere. Hence, an understanding is sought of how the type and quantity of significant trace species in coal-gas changes from the coal pile through cleanup subsystems and the electric generators to the exhaust stack of an integrated system.

Pigeaud, A.E.; Helble, J.J.

1994-10-01T23:59:59.000Z

94

Introduction to Traces - CECM  

E-Print Network (OSTI)

Nov 19, 1997 ... Section 2 describes patterns that arise in the construction of truth tables for traces and their theoretical interest for the completeness problem.

95

Nuclear elements in Banach Jordan pairs Ottmar Loos  

E-Print Network (OSTI)

Nuclear elements in Banach Jordan pairs Ottmar Loos Abstract We introduce nuclear elements in Banach Jordan pairs, generalizing the nuclear elements Jordan pairs and show that the trace form Trintroduced in [3] may be extended to the nuclear

96

Contamination of ground and surface waters due to uranium mining and milling. Volume I: Biological processes for concentrating trace elements from uranium mine waters. Open file report 25 Jul 79-14 Sep 81  

Science Conference Proceedings (OSTI)

Wastewater from uranium mines in the Ambrosia Lake district near Grants, N. Mex., contains uranium, selenium, radium, and molybdenum. A novel treatment process for waters from two mines, sections 35 and 36, to reduce the concentrations of the trace contaminants was developed. Particulates are settled by ponding and the waters are passed through an ion exchange resin to remove uranium; barium chloride is added to precipitate sulfate and radium from the mine waters. The mine waters are subsequently passed through three consecutive algae ponds prior to discharge. Water, sediment, and biological samples were collected over a 4-year period and analyzed to assess the role of biological agents in removal of inorganic trace contaminants from the mine waters.

Brieley, C.L.; Brierley, J.A.

1981-11-01T23:59:59.000Z

97

GPU ray tracing  

Science Conference Proceedings (OSTI)

The NVIDIA OptiX ray tracing engine is a programmable system designed for NVIDIA GPUs and other highly parallel architectures. The OptiX engine builds on the key observation that most ray tracing algorithms can be implemented using a small ...

Steven G. Parker; Heiko Friedrich; David Luebke; Keith Morley; James Bigler; Jared Hoberock; David McAllister; Austin Robison; Andreas Dietrich; Greg Humphreys; Morgan McGuire; Martin Stich

2013-05-01T23:59:59.000Z

98

Ray tracing visualization toolkit  

Science Conference Proceedings (OSTI)

The Ray Tracing Visualization Toolkit (rtVTK) is a collection of programming and visualization tools supporting visual analysis of ray-based rendering algorithms. rtVTK leverages layered visualization within the spatial domain of computation, enabling ... Keywords: ray tracing, ray-based rendering, visualization

Christiaan Gribble; Jeremy Fisher; Daniel Eby; Ed Quigley; Gideon Ludwig

2012-03-01T23:59:59.000Z

99

It's Elemental - The Element Fermium  

NLE Websites -- All DOE Office Websites (Extended Search)

Einsteinium Previous Element (Einsteinium) The Periodic Table of Elements Next Element (Mendelevium) Mendelevium The Element Fermium Click for Isotope Data 100 Fm Fermium 257...

100

It's Elemental - The Element Neptunium  

NLE Websites -- All DOE Office Websites (Extended Search)

Uranium Previous Element (Uranium) The Periodic Table of Elements Next Element (Plutonium) Plutonium The Element Neptunium Click for Isotope Data 93 Np Neptunium 237 Atomic...

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

It's Elemental - The Element Ruthenium  

NLE Websites -- All DOE Office Websites (Extended Search)

Technetium Previous Element (Technetium) The Periodic Table of Elements Next Element (Rhodium) Rhodium The Element Ruthenium Click for Isotope Data 44 Ru Ruthenium 101.07 Atomic...

102

It's Elemental - The Element Actinium  

NLE Websites -- All DOE Office Websites (Extended Search)

Radium Previous Element (Radium) The Periodic Table of Elements Next Element (Thorium) Thorium The Element Actinium Click for Isotope Data 89 Ac Actinium 227 Atomic Number: 89...

103

Sensor Data Trace Communication  

This is a method and process for detecting, locating and quantifying physical phenomena using a data trace that may be incorporated and/or installed on structures including oil and gas pipes and bridges, buildings, etc.

104

Element associations in ash from waste combustion in fluidized bed  

SciTech Connect

The incineration of MSW in fluidized beds is a commonly applied waste management practice. The composition of the ashes produced in a fluidized bed boiler has important environmental implications as potentially toxic trace elements may be associated with ash particles and it is therefore essential to determine the mechanisms controlling the association of trace elements to ash particles, including the role of major element composition. The research presented here uses micro-analytical techniques to study the distribution of major and trace elements and determine the importance of affinity-based binding mechanisms in separate cyclone ash particles from MSW combustion. Particle size and the occurrence of Ca and Fe were found to be important factors for the binding of trace elements to ash particles, but the binding largely depends on random associations based on the presence of a particle when trace elements condensate in the flue gas.

Karlfeldt Fedje, K., E-mail: karinka@chalmers.s [Department of Chemical and Biological Engineering, Division of Environmental Inorganic Chemistry, Chalmers University of Technology, Kemivaegen 10, 412 96 Goeteborg (Sweden); Rauch, S. [Department of Civil and Environmental Engineering, Division of Water Environment Technology, Chalmers University of Technology, Sven Hultins Gata 8, 412 96 Goeteborg (Sweden); Cho, P.; Steenari, B.-M. [Department of Chemical and Biological Engineering, Division of Environmental Inorganic Chemistry, Chalmers University of Technology, Kemivaegen 10, 412 96 Goeteborg (Sweden)

2010-07-15T23:59:59.000Z

105

Trace Impurities and Activation Products in Base Metals  

Science Conference Proceedings (OSTI)

This report documents the results of research related to the concentrations of trace impurities and activation products in stainless steel alloys used for reactor vessels and internals. While present in extremely low concentrations, these trace elements and radionuclides can impact radioactive waste disposal of the components upon decommissioning.BackgroundThe primary basis of activity in a decommissioning source term is activated metals from the reactor and ...

2012-10-30T23:59:59.000Z

106

Tracing Geothermal Fluids  

DOE Green Energy (OSTI)

Chemical compounds have been designed under this contract that can be used to trace water that has been injected into vapor-dominated and two-phase geothermal fields. Increased knowledge of the injection flow is provided by the tracers, and this augments the power that can be produced. Details on the stability and use of these tracers are included in this report.

Michael C. Adams Greg Nash

2004-03-31T23:59:59.000Z

107

CX-001459: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Determination Air Quality VIII: An International Conference on Carbon Management, Mercury, Trace Elements, Sulfur Oxide (SOx), Nitrogen Oxide (NOx) CX(s) Applied: A9 Date: 03...

108

CGC Trace Species Partitioning  

NLE Websites -- All DOE Office Websites (Extended Search)

Trace Species Partitioning as Affected Trace Species Partitioning as Affected by Cold Gas Cleanup Conditions: A Thermodynamic Analysis February 10, 2011 DOE/NETL-2011/1503 T r ace Species P ar titioning at C old G as C leanup C onditions Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name,

109

Trace metals in sediments of coastal Siberia  

E-Print Network (OSTI)

For the work described in this thesis, a total of 218 samples from 104 cores from the East Siberian, Laptev, Kara, and Pechora Seas and the Ob and Yenisei Rivers were analyzed for the trace metals Ag, As, Ba, Cd, Cr, Cu, Fe, Hg, Ni, Pb, Sb, and Zn. To make comparisons between locations easier, the concentration of all elements was normalized to Fe to account for variability in grain size and mineralogy. For the metals Ag, Cd, and Hg there was poor correlation with Fe, likely partially due to analytical variations caused by the low concentrations of these elements. Copper, Ni and Zn showed good correlation with Fe, suggesting these elements are from natural inputs to the sediments. Arsenic, Ba, Cr, Pb, and Sb showed variable correlations, suggesting a more mafic (basaltic) mineral phase at some locations and/or diagenetic redistribution of these metals. No statistically significant differences were found between metal to Fe ratios at the surface (0-2.5 cm) of the sediment cores and the bottoms (5- 1 00 cm), with a few exceptions. There was also no statistically significant difference in the average metal to Fe ratios of the East Siberian and Laptev Seas. There was, however, a significant difference when these two seas were compared to the Kara and Pechora Seas, suggesting different mineralogy in the drainage basins of eastern and western Siberia. Sediment from the Kara Sea was similar in trace metal concentration to sediment from its likely source, the Ob and Yenisei rivers.

Esnough, Teresa Elizabeth

1996-01-01T23:59:59.000Z

110

Flexible reference trace reduction for VM simulations  

Science Conference Proceedings (OSTI)

The unmanageably large size of reference traces has spurred the development of sophisticated trace reduction techniques. In this article we present two new algorithms for trace reduction: Safely Allowed Drop (SAD) and Optimal LRU Reduction ... Keywords: cache hierarchies, locality, reference traces, trace compression, trace reduction

Scott F. Kaplan; Yannis Smaragdakis; Paul R. Wilson

2003-01-01T23:59:59.000Z

111

It's Elemental - The Element Lithium  

NLE Websites -- All DOE Office Websites (Extended Search)

(Helium) The Periodic Table of Elements Next Element (Beryllium) Beryllium The Element Lithium Click for Isotope Data 3 Li Lithium 6.941 Atomic Number: 3 Atomic Weight: 6.941...

112

It's Elemental - The Element Plutonium  

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Next Element (Americium) Americium The Element Plutonium Click for Isotope Data 94 Pu Plutonium 244 Atomic Number: 94 Atomic Weight: 244 Melting Point: 913 K (640C or...

113

Trace Element Analysis At Roosevelt Hot Springs Area (Christensen...  

Open Energy Info (EERE)

fluid conduits; and (5) deposits of calcium carbonate where flashing of brine to steam due to pressure release has occurred. References Odin D. Christensen, Regina A....

114

Trace-Element Distribution In An Active Hydrothermal System,...  

Open Energy Info (EERE)

flow-controlling fractures; (5) deposits of CaCO3 at depth where flashing of brine to steam has occurred due to pressure release. The geochemical enrichments are not, in...

115

Tracing element sources of hydrothermal mineral deposits: REE and ...  

Science Conference Proceedings (OSTI)

inclusion studies are the only way to obtain direct evidence from these ... and eastern part of the Derbyshire Dome (Fig. 1). The ... calcite is more abundant in the western part of the vein ...... and hydrothermal fluids, it is hard to understand why.

116

The Deportment of Trace Toxic Elements in Cyanide Solutions  

Science Conference Proceedings (OSTI)

Stratigraphy, Mineralogy, Geochemistry, and Genesis of the Au-Rich Volcanogenic Massive Sulfide (VMS) System from the Baie Verte Peninsula, NW

117

Optimally profiling and tracing programs  

Science Conference Proceedings (OSTI)

This paper describes algorithms for inserting monitoring code to profile and trace programs. These algorithms greatly reduce the cost of measuring programs with respect to the commonly used technique of placing code in each basic block. Program profiling ... Keywords: control-flow graph, instruction tracing, instrumentation, profiling

Thomas Ball; James R. Larus

1994-07-01T23:59:59.000Z

118

Trace Anomaly in Geometric Discretization  

E-Print Network (OSTI)

I develop the simplest geometric-discretized analogue of two dimensional scalar field theory, which qualitatively reproduces the trace anomaly of the continuous theory. The discrete analogue provides an interpretation of the trace anomaly in terms of a non-trivial transformation of electric-magnetic duality-invariant modes of resistor networks that accommodate both electric and magnetic charge currents.

Czech, B

2007-01-01T23:59:59.000Z

119

Zevenhoven & Kilpinen TRACE ELEMENTS, ALKALI METALS 19.6.2001 8-1 Chapter 8 Trace elements,  

E-Print Network (OSTI)

­3109. (28) Niksa, S.; Fujiwara, N. Predicting extents of mercury oxidation in coal-derived flue gases. J, 1365­1371. (6) Presto, A. A.; Granite, E. J. Survey of catalysts for oxidation of mercury in flue gas mercury (Hg0) from simulated coal-combustion flue gas. Experiments were carried out in fixed-bed reactors

Laughlin, Robert B.

120

HELSINKI UNIVERSITY OF TECHNOLOGY ENE-47.153 Trace elements and alkaliTrace elements and alkali  

E-Print Network (OSTI)

REGULATIONS Although incinerator flue gas emission limits for acid gases have been imposed by the federal, such as sodium chlorite (NaCI02), is added to oxidize flue gas NO to N02, which can be removed by a sodium of saturated flue gas to approximately 60°C ( 140°F), the total (par ticulate and gaseous) mercury emissions

Zevenhoven, Ron

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

It's Elemental - Element Concentration Game  

NLE Websites -- All DOE Office Websites (Extended Search)

symbols of the elements. After you have had time to study the cards, the computer will flip them over and ask you to find a particular element. Click on the card that contains...

122

Tracing Geothermal Fluids  

DOE Green Energy (OSTI)

Geothermal water must be injected back into the reservoir after it has been used for power production. Injection is critical in maximizing the power production and lifetime of the reservoir. To use injectate effectively the direction and velocity of the injected water must be known or inferred. This information can be obtained by using chemical tracers to track the subsurface flow paths of the injected fluid. Tracers are chemical compounds that are added to the water as it is injected back into the reservoir. The hot production water is monitored for the presence of this tracer using the most sensitive analytic methods that are economically feasible. The amount and concentration pattern of the tracer revealed by this monitoring can be used to evaluate how effective the injection strategy is. However, the tracers must have properties that suite the environment that they will be used in. This requires careful consideration and testing of the tracer properties. In previous and parallel investigations we have developed tracers that are suitable from tracing liquid water. In this investigation, we developed tracers that can be used for steam and mixed water/steam environments. This work will improve the efficiency of injection management in geothermal fields, lowering the cost of energy production and increasing the power output of these systems.

Michael C. Adams; Greg Nash

2004-03-01T23:59:59.000Z

123

It's Elemental - The Element Europium  

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Samarium Samarium Previous Element (Samarium) The Periodic Table of Elements Next Element (Gadolinium) Gadolinium The Element Europium [Click for Isotope Data] 63 Eu Europium 151.964 Atomic Number: 63 Atomic Weight: 151.964 Melting Point: 1095 K (822°C or 1512°F) Boiling Point: 1802 K (1529°C or 2784°F) Density: 5.24 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: none Group Name: Lanthanide What's in a name? Named after the continent of Europe. Say what? Europium is pronounced as yoo-RO-pee-em. History and Uses: Europium was discovered by Eugène-Antole Demarçay, a French chemist, in 1896. Demarçay suspected that samples of a recently discovered element, samarium, were contaminated with an unknown element. He was able to produce

124

It's Elemental - The Element Potassium  

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Argon Argon Previous Element (Argon) The Periodic Table of Elements Next Element (Calcium) Calcium The Element Potassium [Click for Isotope Data] 19 K Potassium 39.0983 Atomic Number: 19 Atomic Weight: 39.0983 Melting Point: 336.53 K (63.38°C or 146.08°F) Boiling Point: 1032 K (759°C or 1398°F) Density: 0.89 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 1 Group Name: Alkali Metal What's in a name? From the English word potash. Potassium's chemical symbol comes from the Latin word for alkali, kalium. Say what? Potassium is pronounced as poh-TASS-ee-em. History and Uses: Although potassium is the eighth most abundant element on earth and comprises about 2.1% of the earth's crust, it is a very reactive element

125

It's Elemental - The Element Sulfur  

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Phosphorus Phosphorus Previous Element (Phosphorus) The Periodic Table of Elements Next Element (Chlorine) Chlorine The Element Sulfur [Click for Isotope Data] 16 S Sulfur 32.065 Atomic Number: 16 Atomic Weight: 32.065 Melting Point: 388.36 K (115.21°C or 239.38°F) Boiling Point: 717.75 K (444.60°C or 832.28°F) Density: 2.067 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Non-metal Period Number: 3 Group Number: 16 Group Name: Chalcogen What's in a name? From the Sanskrit word sulvere and the Latin word sulphurium. Say what? Sulfur is pronounced as SUL-fer. History and Uses: Sulfur, the tenth most abundant element in the universe, has been known since ancient times. Sometime around 1777, Antoine Lavoisier convinced the rest of the scientific community that sulfur was an element. Sulfur is a

126

It's Elemental - The Element Magnesium  

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Sodium Sodium Previous Element (Sodium) The Periodic Table of Elements Next Element (Aluminum) Aluminum The Element Magnesium [Click for Isotope Data] 12 Mg Magnesium 24.3050 Atomic Number: 12 Atomic Weight: 24.3050 Melting Point: 923 K (650°C or 1202°F) Boiling Point: 1363 K (1090°C or 1994°F) Density: 1.74 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 3 Group Number: 2 Group Name: Alkaline Earth Metal What's in a name? For Magnesia, a district in the region of Thessaly, Greece. Say what? Magnesium is pronounced as mag-NEE-zhi-em. History and Uses: Although it is the eighth most abundant element in the universe and the seventh most abundant element in the earth's crust, magnesium is never found free in nature. Magnesium was first isolated by Sir Humphry Davy, an

127

ARM - Measurement - Trace gas concentration  

NLE Websites -- All DOE Office Websites (Extended Search)

govMeasurementsTrace gas concentration govMeasurementsTrace gas concentration ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Trace gas concentration The amount per unit volume of trace gases other than carbon dioxide, ozone and water vapor, typically measured in conjunction with in situ aerosol measurements, e.g. carbon monoxide, nitrogen oxides, sulfur dioxide. Categories Atmospheric Carbon, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO : Carbon Monoxide Mixing Ratio System

128

Trace 700 | Open Energy Information  

Open Energy Info (EERE)

Trace 700 Trace 700 Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Trace 700 Agency/Company /Organization: Trane Sector: Energy Focus Area: Buildings, Energy Efficiency Topics: Technology characterizations Resource Type: Software/modeling tools Website: www.trane.com/Commercial/Dna/View.aspx?i=1136 References: http://www.trane.com/Commercial/Dna/View.aspx?i=1136 Detailed HVAC design tool. Can provide heating and cooling load calculation, system sizing, and energy use. A fairly thorough understanding of HVAC is necessary to use this tool. Tool Summary LAUNCH TOOL Name: Trace 700 Agency/Company /Organization: Trane Phase: Create a Vision, Determine Baseline, "Evaluate Options and Determine Feasibility" is not in the list of possible values (Bring the Right People Together, Create a Vision, Determine Baseline, Evaluate Options, Develop Goals, Prepare a Plan, Get Feedback, Develop Finance and Implement Projects, Create Early Successes, Evaluate Effectiveness and Revise as Needed) for this property.

129

The trace partitioning abstract domain  

Science Conference Proceedings (OSTI)

In order to achieve better precision of abstract interpretation-based static analysis, we introduce a new generic abstract domain, the trace partitioning abstract domain. We develop a theoretical framework allowing a wide range of instantiations of the ...

Xavier Rival; Laurent Mauborgne

2007-08-01T23:59:59.000Z

130

It's Elemental - The Element Technetium  

NLE Websites -- All DOE Office Websites (Extended Search)

Molybdenum Molybdenum Previous Element (Molybdenum) The Periodic Table of Elements Next Element (Ruthenium) Ruthenium The Element Technetium [Click for Isotope Data] 43 Tc Technetium 98 Atomic Number: 43 Atomic Weight: 98 Melting Point: 2430 K (2157°C or 3915°F) Boiling Point: 4538 K (4265°C or 7709°F) Density: 11 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 5 Group Number: 7 Group Name: none Radioactive and Artificially Produced What's in a name? From the Greek word for artificial, technetos. Say what? Technetium is pronounced as tek-NEE-she-em. History and Uses: Technetium was the first artificially produced element. It was isolated by Carlo Perrier and Emilio Segrè in 1937. Technetium was created by bombarding molybdenum atoms with deuterons that had been accelerated by a

131

It's Elemental - The Element Cobalt  

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Iron Iron Previous Element (Iron) The Periodic Table of Elements Next Element (Nickel) Nickel The Element Cobalt [Click for Isotope Data] 27 Co Cobalt 58.933195 Atomic Number: 27 Atomic Weight: 58.933195 Melting Point: 1768 K (1495°C or 2723°F) Boiling Point: 3200 K (2927°C or 5301°F) Density: 8.86 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 9 Group Name: none What's in a name? From the German word for goblin or evil spirit, kobald and the Greek word for mine, cobalos. Say what? Cobalt is pronounced as KO-bolt. History and Uses: Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. Brandt was attempting to prove that the ability of certain minerals to color glass blue was due to an unknown element and not to bismuth, as was commonly

132

It's Elemental - The Element Bromine  

NLE Websites -- All DOE Office Websites (Extended Search)

Selenium Selenium Previous Element (Selenium) The Periodic Table of Elements Next Element (Krypton) Krypton The Element Bromine [Click for Isotope Data] 35 Br Bromine 79.904 Atomic Number: 35 Atomic Weight: 79.904 Melting Point: 265.95 K (-7.2°C or 19.0°F) Boiling Point: 331.95 K (58.8°C or 137.8°F) Density: 3.11 grams per cubic centimeter Phase at Room Temperature: Liquid Element Classification: Non-metal Period Number: 4 Group Number: 17 Group Name: Halogen What's in a name? From the Greek word for stench, bromos. Say what? Bromine is pronounced as BRO-meen. History and Uses: The only nonmetallic element that is a liquid at normal room temperatures, bromine was produced by Carl Löwig, a young chemistry student, the summer before starting his freshman year at Heidelberg. When he showed his

133

It's Elemental - The Element Oxygen  

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Nitrogen Nitrogen Previous Element (Nitrogen) The Periodic Table of Elements Next Element (Fluorine) Fluorine The Element Oxygen [Click for Isotope Data] 8 O Oxygen 15.9994 Atomic Number: 8 Atomic Weight: 15.9994 Melting Point: 54.36 K (-218.79°C or -361.82°F) Boiling Point: 90.20 K (-182.95°C or -297.31°F) Density: 0.001429 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 2 Group Number: 16 Group Name: Chalcogen What's in a name? From the greek words oxys and genes, which together mean "acid forming." Say what? Oxygen is pronounced as OK-si-jen. History and Uses: Oxygen had been produced by several chemists prior to its discovery in 1774, but they failed to recognize it as a distinct element. Joseph

134

It's Elemental - The Element Nitrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Carbon Previous Element (Carbon) The Periodic Table of Elements Next Element (Oxygen) Oxygen The Element Nitrogen [Click for Isotope Data] 7 N Nitrogen 14.0067 Atomic Number: 7 Atomic Weight: 14.0067 Melting Point: 63.15 K (-210.00°C or -346.00°F) Boiling Point: 77.36 K (-195.79°C or -320.44°F) Density: 0.0012506 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 2 Group Number: 15 Group Name: Pnictogen What's in a name? From the Greek words nitron and genes, which together mean "saltpetre forming." Say what? Nitrogen is pronounced as NYE-treh-gen. History and Uses: Nitrogen was discovered by the Scottish physician Daniel Rutherford in 1772. It is the fifth most abundant element in the universe and makes up

135

It's Elemental - The Element Sodium  

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Neon Neon Previous Element (Neon) The Periodic Table of Elements Next Element (Magnesium) Magnesium The Element Sodium [Click for Isotope Data] 11 Na Sodium 22.98976928 Atomic Number: 11 Atomic Weight: 22.98976928 Melting Point: 370.95 K (97.80°C or 208.04°F) Boiling Point: 1156 K (883°C or 1621°F) Density: 0.97 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 3 Group Number: 1 Group Name: Alkali Metal What's in a name? From the English word soda and from the Medieval Latin word sodanum, which means "headache remedy." Sodium's chemical symbol comes from the Latin word for sodium carbonate, natrium. Say what? Sodium is pronounced as SO-dee-em. History and Uses: Although sodium is the sixth most abundant element on earth and comprises

136

It's Elemental - The Element Francium  

NLE Websites -- All DOE Office Websites (Extended Search)

Radon Radon Previous Element (Radon) The Periodic Table of Elements Next Element (Radium) Radium The Element Francium [Click for Isotope Data] 87 Fr Francium 223 Atomic Number: 87 Atomic Weight: 223 Melting Point: 300 K (27°C or 81°F) Boiling Point: Unknown Density: Unknown Phase at Room Temperature: Solid Element Classification: Metal Period Number: 7 Group Number: 1 Group Name: Alkali Metal Radioactive What's in a name? Named for the country of France. Say what? Francium is pronounced as FRAN-see-em. History and Uses: Francium was discovered by Marguerite Catherine Perey, a French chemist, in 1939 while analyzing actinium's decay sequence. Although considered a natural element, scientists estimate that there is no more than one ounce of francium in the earth's crust at one time. Since there is so little

137

It's Elemental - The Element Phosphorus  

NLE Websites -- All DOE Office Websites (Extended Search)

Silicon Silicon Previous Element (Silicon) The Periodic Table of Elements Next Element (Sulfur) Sulfur The Element Phosphorus [Click for Isotope Data] 15 P Phosphorus 30.973762 Atomic Number: 15 Atomic Weight: 30.973762 Melting Point: 317.30 K (44.15°C or 111.47°F) Boiling Point: 553.65 K (280.5°C or 536.9°F) Density: 1.82 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Non-metal Period Number: 3 Group Number: 15 Group Name: Pnictogen What's in a name? From the Greek word for light bearing, phosphoros. Say what? Phosphorus is pronounced as FOS-fer-es. History and Uses: In what is perhaps the most disgusting method of discovering an element, phosphorus was first isolated in 1669 by Hennig Brand, a German physician and alchemist, by boiling, filtering and otherwise processing as many as 60

138

It's Elemental - The Element Cerium  

NLE Websites -- All DOE Office Websites (Extended Search)

Lanthanum Lanthanum Previous Element (Lanthanum) The Periodic Table of Elements Next Element (Praseodymium) Praseodymium The Element Cerium [Click for Isotope Data] 58 Ce Cerium 140.116 Atomic Number: 58 Atomic Weight: 140.116 Melting Point: 1071 K (798°C or 1468°F) Boiling Point: 3697 K (3424°C or 6195°F) Density: 6.770 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: none Group Name: Lanthanide What's in a name? Named for the asteroid Ceres. Say what? Cerium is pronounced as SER-ee-em. History and Uses: Cerium was discovered by Jöns Jacob Berzelius and Wilhelm von Hisinger, Swedish chemists, and independently by Martin Heinrich Klaproth, a German chemist, in 1803. Cerium is the most abundant of the rare earth elements

139

It's Elemental - The Element Neon  

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Fluorine Fluorine Previous Element (Fluorine) The Periodic Table of Elements Next Element (Sodium) Sodium The Element Neon [Click for Isotope Data] 10 Ne Neon 20.1797 Atomic Number: 10 Atomic Weight: 20.1797 Melting Point: 24.56 K (-248.59°C or -415.46°F) Boiling Point: 27.07 K (-246.08°C or -410.94°F) Density: 0.0008999 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 2 Group Number: 18 Group Name: Noble Gas What's in a name? From the Greek word for new, neos. Say what? Neon is pronounced as NEE-on. History and Uses: Neon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist, shortly after their discovery of the element krypton in 1898. Like krypton, neon was discovered through the

140

It's Elemental - The Element Manganese  

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Chromium Chromium Previous Element (Chromium) The Periodic Table of Elements Next Element (Iron) Iron The Element Manganese [Click for Isotope Data] 25 Mn Manganese 54.938045 Atomic Number: 25 Atomic Weight: 54.938045 Melting Point: 1519 K (1246°C or 2275°F) Boiling Point: 2334 K (2061°C or 3742°F) Density: 7.3 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 7 Group Name: none What's in a name? From the Latin word for magnet, magnes. Say what? Manganese is pronounced as MAN-ge-nees. History and Uses: Proposed to be an element by Carl Wilhelm Scheele in 1774, manganese was discovered by Johan Gottlieb Gahn, a Swedish chemist, by heating the mineral pyrolusite (MnO2) in the presence of charcoal later that year.

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

It's Elemental - The Element Titanium  

NLE Websites -- All DOE Office Websites (Extended Search)

Scandium Scandium Previous Element (Scandium) The Periodic Table of Elements Next Element (Vanadium) Vanadium The Element Titanium [Click for Isotope Data] 22 Ti Titanium 47.867 Atomic Number: 22 Atomic Weight: 47.867 Melting Point: 1941 K (1668°C or 3034°F) Boiling Point: 3560 K (3287°C or 5949°F) Density: 4.5 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 4 Group Name: none What's in a name? From the Greek word Titans, the mythological "first sons of the Earth." Say what? Titanium is pronounced as tie-TAY-nee-em. History and Uses: Titanium was discovered in 1791 by the Reverend William Gregor, an English pastor. Pure titanium was first produced by Matthew A. Hunter, an American metallurgist, in 1910. Titanium is the ninth most abundant element in the

142

It's Elemental - Isotopes of the Element Neptunium  

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Uranium Previous Element (Uranium) The Periodic Table of Elements Next Element (Plutonium) Plutonium Isotopes of the Element Neptunium Click for Main Data Most of the isotope...

143

It's Elemental - Isotopes of the Element Nobelium  

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Mendelevium Previous Element (Mendelevium) The Periodic Table of Elements Next Element (Lawrencium) Lawrencium Isotopes of the Element Nobelium Click for Main Data Most of the...

144

It's Elemental - Isotopes of the Element Fermium  

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Einsteinium Previous Element (Einsteinium) The Periodic Table of Elements Next Element (Mendelevium) Mendelevium Isotopes of the Element Fermium Click for Main Data Most of the...

145

It's Elemental - Isotopes of the Element Sulfur  

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Phosphorus Previous Element (Phosphorus) The Periodic Table of Elements Next Element (Chlorine) Chlorine Isotopes of the Element Sulfur Click for Main Data Most of the isotope...

146

It's Elemental - Isotopes of the Element Argon  

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Chlorine Previous Element (Chlorine) The Periodic Table of Elements Next Element (Potassium) Potassium Isotopes of the Element Argon Click for Main Data Most of the isotope data...

147

It's Elemental - Isotopes of the Element Ruthenium  

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Technetium Previous Element (Technetium) The Periodic Table of Elements Next Element (Rhodium) Rhodium Isotopes of the Element Ruthenium Click for Main Data Most of the isotope...

148

It's Elemental - Isotopes of the Element Molybdenum  

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Niobium Previous Element (Niobium) The Periodic Table of Elements Next Element (Technetium) Technetium Isotopes of the Element Molybdenum Click for Main Data Most of the isotope...

149

It's Elemental - Isotopes of the Element Protactinium  

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Thorium Previous Element (Thorium) The Periodic Table of Elements Next Element (Uranium) Uranium Isotopes of the Element Protactinium Click for Main Data Most of the isotope data...

150

It's Elemental - The Element Tungsten  

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melting point of all metallic elements and is used to make filaments for incandescent light bulbs, fluorescent light bulbs and television tubes. Tungsten expands at nearly the...

151

It's Elemental - The Element Darmstadtium  

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Roentgenium The Element Darmstadtium Click for Isotope Data 110 Ds Darmstadtium 281 Atomic Number: 110 Atomic Weight: 281 Melting Point: Unknown Boiling Point: Unknown...

152

It's Elemental - The Element Berkelium  

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Californium The Element Berkelium Click for Isotope Data 97 Bk Berkelium 247 Atomic Number: 97 Atomic Weight: 247 Melting Point: 1323 K (1050C or 1922F) Boiling...

153

Apparatus and Method for Ultra-Sensitive trace Analysis  

DOE Patents (OSTI)

An apparatus and method for conducting ultra-sensitive trace element and isotope analysis. The apparatus injects a sample through a fine nozzle to form an atomic beam. A DC discharge is used to elevate select atoms to a metastable energy level. These atoms are then acted on by a laser oriented orthogonally to the beam path to reduce the traverse velocity and to decrease the divergence angle of the beam. The beam then enters a Zeeman slower where a counter-propagating laser beam acts to slow the atoms down. Then select atoms are captured in a magneto-optical trap where they undergo fluorescence. A portion of the scattered photons are imaged onto a photo-detector, and the results analyzed to detect the presence of single atoms of the specific trace elements.

Lu, Zhengtian; Bailey, Kevin G.; Chen, Chun Yen; Li, Yimin; O' Connor, Thomas P.; Young, Linda

2000-01-03T23:59:59.000Z

154

It's Elemental - The Element Platinum  

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Iridium Iridium Previous Element (Iridium) The Periodic Table of Elements Next Element (Gold) Gold The Element Platinum [Click for Isotope Data] 78 Pt Platinum 195.084 Atomic Number: 78 Atomic Weight: 195.084 Melting Point: 2041.55 K (1768.4°C or 3215.1°F) Boiling Point: 4098 K (3825°C or 6917°F) Density: 21.46 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 10 Group Name: none What's in a name? From the Spainsh word for silver, platina. Say what? Platinum is pronounced as PLAT-en-em. History and Uses: Used by the pre-Columbian Indians of South America, platinum wasn't noticed by western scientists until 1735. Platinum can occur free in nature and is sometimes found in deposits of gold-bearing sands, primarily those found in

155

It's Elemental - The Element Arsenic  

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Germanium Germanium Previous Element (Germanium) The Periodic Table of Elements Next Element (Selenium) Selenium The Element Arsenic [Click for Isotope Data] 33 As Arsenic 74.92160 Atomic Number: 33 Atomic Weight: 74.92160 Melting Point: 1090 K (817°C or 1503°F) Boiling Point: 887 K (614°C or 1137°F) Density: 5.776 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Semi-metal Period Number: 4 Group Number: 15 Group Name: Pnictogen What's in a name? From the Latin word arsenicum, the Greek word arsenikon and the Arabic word Az-zernikh. Say what? Arsenic is pronounced as AR-s'n-ik. History and Uses: Although arsenic compounds were mined by the early Chinese, Greek and Egyptian civilizations, it is believed that arsenic itself was first identified by Albertus Magnus, a German alchemist, in 1250. Arsenic occurs

156

It's Elemental - The Element Barium  

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Cesium Cesium Previous Element (Cesium) The Periodic Table of Elements Next Element (Lanthanum) Lanthanum The Element Barium [Click for Isotope Data] 56 Ba Barium 137.327 Atomic Number: 56 Atomic Weight: 137.327 Melting Point: 1000 K (727°C or 1341°F) Boiling Point: 2170 K (1897°C or 3447°F) Density: 3.62 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 2 Group Name: Alkaline Earth Metal What's in a name? From the Greek word for heavy, barys. Say what? Barium is pronounced as BAR-ee-em. History and Uses: Barium was first isolated by Sir Humphry Davy, an English chemist, in 1808 through the electrolysis of molten baryta (BaO). Barium is never found free in nature since it reacts with oxygen in the air, forming barium oxide

157

It's Elemental - The Element Astatine  

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Polonium Polonium Previous Element (Polonium) The Periodic Table of Elements Next Element (Radon) Radon The Element Astatine [Click for Isotope Data] 85 At Astatine 210 Atomic Number: 85 Atomic Weight: 210 Melting Point: 575 K (302°C or 576°F) Boiling Point: Unknown Density: about 7 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Semi-metal Period Number: 6 Group Number: 17 Group Name: Halogen Radioactive What's in a name? From the Greek word for unstable, astatos. Say what? Astatine is pronounced as AS-teh-teen or as AS-teh-ten. History and Uses: Astatine was produced by Dale R. Carson, K.R. MacKenzie and Emilio Segrè by bombarding an isotope of bismuth, bismuth-209, with alpha particles that had been accelerated in a device called a cyclotron. This created

158

It's Elemental - The Element Copper  

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Nickel Nickel Previous Element (Nickel) The Periodic Table of Elements Next Element (Zinc) Zinc The Element Copper [Click for Isotope Data] 29 Cu Copper 63.546 Atomic Number: 29 Atomic Weight: 63.546 Melting Point: 1357.77 K (1084.62°C or 1984.32°F) Boiling Point: 2835 K (2562°C or 4644°F) Density: 8.933 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 11 Group Name: none What's in a name? From the Latin word cuprum, which means "from the island of Cyprus." Say what? Copper is pronounced as KOP-er. History and Uses: Archaeological evidence suggests that people have been using copper for at least 11,000 years. Relatively easy to mine and refine, people discovered methods for extracting copper from its ores at least 7,000 years ago. The

159

It's Elemental - The Element Gadolinium  

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Europium Europium Previous Element (Europium) The Periodic Table of Elements Next Element (Terbium) Terbium The Element Gadolinium [Click for Isotope Data] 64 Gd Gadolinium 157.25 Atomic Number: 64 Atomic Weight: 157.25 Melting Point: 1586 K (1313°C or 2395°F) Boiling Point: 3546 K (3273°C or 5923°F) Density: 7.90 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: none Group Name: Lanthanide What's in a name? Named for the mineral gadolinite which was named after Johan Gadolin, a Finnish chemist. Say what? Gadolinium is pronounced as GAD-oh-LIN-ee-em. History and Uses: Spectroscopic evidence for the existence of gadolinium was first observed by the Swiss chemist Jean Charles Galissard de Marignac in the minerals

160

It's Elemental - The Element Mercury  

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Gold Gold Previous Element (Gold) The Periodic Table of Elements Next Element (Thallium) Thallium The Element Mercury [Click for Isotope Data] 80 Hg Mercury 200.59 Atomic Number: 80 Atomic Weight: 200.59 Melting Point: 234.32 K (-38.83°C or -37.89°F) Boiling Point: 629.88 K (356.73°C or 674.11°F) Density: 13.5336 grams per cubic centimeter Phase at Room Temperature: Liquid Element Classification: Metal Period Number: 6 Group Number: 12 Group Name: none What's in a name? Named after the planet Mercury. Mercury's chemical symbol comes from the Greek word hydrargyrum, which means "liquid silver." Say what? Mercury is pronounced as MER-kyoo-ree. History and Uses: Mercury was known to the ancient Chinese and Hindus and has been found in 3500 year old Egyptian tombs. Mercury is not usually found free in nature

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

It's Elemental - The Element Hafnium  

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Lutetium Lutetium Previous Element (Lutetium) The Periodic Table of Elements Next Element (Tantalum) Tantalum The Element Hafnium [Click for Isotope Data] 72 Hf Hafnium 178.49 Atomic Number: 72 Atomic Weight: 178.49 Melting Point: 2506 K (2233°C or 4051°F) Boiling Point: 4876 K (4603°C or 8317°F) Density: 13.3 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 4 Group Name: none What's in a name? From the Latin word for the city of Copenhagen, Hafnia. Say what? Hafnium is pronounced as HAF-neeem. History and Uses: Hafnium was discovered by Dirk Coster, a Danish chemist, and Charles de Hevesy, a Hungarian chemist, in 1923. They used a method known as X-ray spectroscopy to study the arrangement of the outer electrons of atoms in

162

It's Elemental - The Element Boron  

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Beryllium Beryllium Previous Element (Beryllium) The Periodic Table of Elements Next Element (Carbon) Carbon The Element Boron [Click for Isotope Data] 5 B Boron 10.811 Atomic Number: 5 Atomic Weight: 10.811 Melting Point: 2348 K (2075°C or 3767°F) Boiling Point: 4273 K (4000°C or 7232°F) Density: 2.37 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Semi-metal Period Number: 2 Group Number: 13 Group Name: none What's in a name? From the Arabic word Buraq and the Persian word Burah, which are both words for the material "borax." Say what? Boron is pronounced as BO-ron. History and Uses: Boron was discovered by Joseph-Louis Gay-Lussac and Louis-Jaques Thénard, French chemists, and independently by Sir Humphry Davy, an English chemist,

163

It's Elemental - The Element Thorium  

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Actinium Actinium Previous Element (Actinium) The Periodic Table of Elements Next Element (Protactinium) Protactinium The Element Thorium [Click for Isotope Data] 90 Th Thorium 232.03806 Atomic Number: 90 Atomic Weight: 232.03806 Melting Point: 2023 K (1750°C or 3182°F) Boiling Point: 5061 K (4788°C or 8650°F) Density: 11.72 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 7 Group Number: none Group Name: Actinide Radioactive What's in a name? Named for the Scandinavian god of war, Thor. Say what? Thorium is pronounced as THOR-ee-em or as THO-ree-em. History and Uses: Thorium was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1828. He discovered it in a sample of a mineral that was given to him by the Reverend Has Morten Thrane Esmark, who suspected that it contained an

164

It's Elemental - The Element Chromium  

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Vanadium Vanadium Previous Element (Vanadium) The Periodic Table of Elements Next Element (Manganese) Manganese The Element Chromium [Click for Isotope Data] 24 Cr Chromium 51.9961 Atomic Number: 24 Atomic Weight: 51.9961 Melting Point: 2180 K (1907°C or 3465°F) Boiling Point: 2944 K (2671°C or 4840°F) Density: 7.15 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 6 Group Name: none What's in a name? From the Greek word for color, chroma. Say what? Chromium is pronounced as KROH-mee-em. History and Uses: Chromium was discovered by Louis-Nicholas Vauquelin while experimenting with a material known as Siberian red lead, also known as the mineral crocoite (PbCrO4), in 1797. He produced chromium oxide (CrO3) by mixing

165

It's Elemental - The Element Iron  

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Manganese Manganese Previous Element (Manganese) The Periodic Table of Elements Next Element (Cobalt) Cobalt The Element Iron [Click for Isotope Data] 26 Fe Iron 55.845 Atomic Number: 26 Atomic Weight: 55.845 Melting Point: 1811 K (1538°C or 2800°F) Boiling Point: 3134 K (2861°C or 5182°F) Density: 7.874 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 8 Group Name: none What's in a name? From the Anglo-Saxon word iron. Iron's chemical symbol comes from the Latin word for iron, ferrum. Say what? Iron is pronounced as EYE-ern. History and Uses: Archaeological evidence suggests that people have been using iron for at least 5000 years. Iron is the cheapest and one of the most abundant of all metals, comprising nearly 5.6% of the earth's crust and nearly all of the

166

It's Elemental - The Element Molybdenum  

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Niobium Niobium Previous Element (Niobium) The Periodic Table of Elements Next Element (Technetium) Technetium The Element Molybdenum [Click for Isotope Data] 42 Mo Molybdenum 95.96 Atomic Number: 42 Atomic Weight: 95.96 Melting Point: 2896 K (2623°C or 4753°F) Boiling Point: 4912 K (4639°C or 8382°F) Density: 10.2 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 5 Group Number: 6 Group Name: none What's in a name? From the Greek word for lead, molybdos. Say what? Molybdenum is pronounced as meh-LIB-deh-nem. History and Uses: Molybdenum was discovered by Carl Welhelm Scheele, a Swedish chemist, in 1778 in a mineral known as molybdenite (MoS2) which had been confused as a lead compound. Molybdenum was isolated by Peter Jacob Hjelm in 1781. Today,

167

It's Elemental - The Element Cesium  

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Xenon Xenon Previous Element (Xenon) The Periodic Table of Elements Next Element (Barium) Barium The Element Cesium [Click for Isotope Data] 55 Cs Cesium 132.9054519 Atomic Number: 55 Atomic Weight: 132.9054519 Melting Point: 301.59 K (28.44°C or 83.19°F) Boiling Point: 944 K (671°C or 1240°F) Density: 1.93 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 1 Group Name: Alkali Metal What's in a name? From the Latin word for sky blue, caesius. Say what? Cesium is pronounced as SEE-zee-em. History and Uses: Cesium was discovered by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff, German chemists, in 1860 through the spectroscopic analysis of Durkheim mineral water. They named cesium after the blue lines they observed in its

168

It's Elemental - The Element Iridium  

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Osmium Osmium Previous Element (Osmium) The Periodic Table of Elements Next Element (Platinum) Platinum The Element Iridium [Click for Isotope Data] 77 Ir Iridium 192.217 Atomic Number: 77 Atomic Weight: 192.217 Melting Point: 2719 K (2446°C or 4435°F) Boiling Point: 4701 K (4428°C or 8002°F) Density: 22.42 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 9 Group Name: none What's in a name? From the Latin word for rainbow, iris. Say what? Iridium is pronounced as i-RID-ee-em. History and Uses: Iridium and osmium were discovered at the same time by the British chemist Smithson Tennant in 1803. Iridium and osmium were identified in the black residue remaining after dissolving platinum ore with aqua regia, a mixture

169

It's Elemental - The Element Gold  

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Platinum Platinum Previous Element (Platinum) The Periodic Table of Elements Next Element (Mercury) Mercury The Element Gold [Click for Isotope Data] 79 Au Gold 196.966569 Atomic Number: 79 Atomic Weight: 196.966569 Melting Point: 1337.33 K (1064.18°C or 1947.52°F) Boiling Point: 3129 K (2856°C or 5173°F) Density: 19.282 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 11 Group Name: none What's in a name? From the Sanskrit word Jval and the Anglo-Saxon word gold. Gold's chemical symbol comes from the the latin word for gold, aurum. Say what? Gold is pronounced as GOLD. History and Uses: An attractive and highly valued metal, gold has been known for at least 5500 years. Gold is sometimes found free in nature but it is usually found

170

It's Elemental - The Element Rhenium  

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Tungsten Tungsten Previous Element (Tungsten) The Periodic Table of Elements Next Element (Osmium) Osmium The Element Rhenium [Click for Isotope Data] 75 Re Rhenium 186.207 Atomic Number: 75 Atomic Weight: 186.207 Melting Point: 3459 K (3186°C or 5767°F) Boiling Point: 5869 K (5596°C or 10105°F) Density: 20.8 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 7 Group Name: none What's in a name? From the Latin word for the Rhine River, Rhenus. Say what? Rhenium is pronounced as REE-nee-em. History and Uses: Rhenium was discovered by the German chemists Ida Tacke-Noddack, Walter Noddack and Otto Carl Berg in 1925. They detected rhenium spectroscopically in platinum ores and in the minerals columbite ((Fe, Mn, Mg)(Nb, Ta)2O6),

171

It's Elemental - The Element Osmium  

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Rhenium Rhenium Previous Element (Rhenium) The Periodic Table of Elements Next Element (Iridium) Iridium The Element Osmium [Click for Isotope Data] 76 Os Osmium 190.23 Atomic Number: 76 Atomic Weight: 190.23 Melting Point: 3306 K (3033°C or 5491°F) Boiling Point: 5285 K (5012°C or 9054°F) Density: 22.57 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 8 Group Name: none What's in a name? From the Greek word for a smell, osme. Say what? Osmium is pronounced as OZ-mee-em. History and Uses: Osmium and iridium were discovered at the same time by the British chemist Smithson Tennant in 1803. Osmium and iridium were identified in the black residue remaining after dissolving platinum ore with aqua regia, a mixture

172

It's Elemental - The Element Antimony  

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Tin Tin Previous Element (Tin) The Periodic Table of Elements Next Element (Tellurium) Tellurium The Element Antimony [Click for Isotope Data] 51 Sb Antimony 121.760 Atomic Number: 51 Atomic Weight: 121.760 Melting Point: 903.78 K (630.63°C or 1167.13°F) Boiling Point: 1860 K (1587°C or 2889°F) Density: 6.685 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Semi-metal Period Number: 5 Group Number: 15 Group Name: Pnictogen What's in a name? From the Greek words anti and monos, which together mean "not alone." Antimony's chemical symbol comes from its historic name, Stibium. Say what? Antimony is pronounced as AN-the-MOH-nee. History and Uses: Antimony has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores stibnite (Sb2S3) and

173

It's Elemental - The Element Lutetium  

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(Hafnium) Hafnium The Element Lutetium Click for Isotope Data 71 Lu Lutetium 174.9668 Atomic Number: 71 Atomic Weight: 174.9668 Melting Point: 1936 K (1663C or 3025F)...

174

It's Elemental - The Element Holmium  

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(Erbium) Erbium The Element Holmium Click for Isotope Data 67 Ho Holmium 164.93032 Atomic Number: 67 Atomic Weight: 164.93032 Melting Point: 1747 K (1474C or 2685F)...

175

It's Elemental - The Element Promethium  

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(Samarium) Samarium The Element Promethium Click for Isotope Data 61 Pm Promethium 145 Atomic Number: 61 Atomic Weight: 145 Melting Point: 1315 K (1042C or 1908F) Boiling...

176

It's Elemental - The Element Cadmium  

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(Indium) Indium The Element Cadmium Click for Isotope Data 48 Cd Cadmium 112.411 Atomic Number: 48 Atomic Weight: 112.411 Melting Point: 594.22 K (321.07C or 609.93F)...

177

It's Elemental - The Element Praseodymium  

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Today, praseodymium is primarily obtained through an ion exchange process from monazite sand ((Ce, La, Th, Nd, Y)PO4), a material rich in rare earth elements. Praseodymium's...

178

It's Elemental - The Element Neodymium  

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Today, neodymium is primarily obtained from through an ion exchange process monazite sand ((Ce, La, Th, Nd, Y)PO4), a material rich in rare earth elements. Neodymium makes up...

179

It's Elemental - The Element Samarium  

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1879. Today, samarium is primarily obtained through an ion exchange process from monazite sand ((Ce, La, Th, Nd, Y)PO4), a material rich in rare earth elements that can contain as...

180

It's Elemental - The Element Lanthanum  

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Today, lanthanum is primarily obtained through an ion exchange process from monazite sand ((Ce, La, Th, Nd, Y)PO4), a material rich in rare earth elements that can contain as...

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

It's Elemental - The Element Fluorine  

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Oxygen Oxygen Previous Element (Oxygen) The Periodic Table of Elements Next Element (Neon) Neon The Element Fluorine [Click for Isotope Data] 9 F Fluorine 18.9984032 Atomic Number: 9 Atomic Weight: 18.9984032 Melting Point: 53.53 K (-219.62°C or -363.32°F) Boiling Point: 85.03 K (-188.12°C or -306.62°F) Density: 0.001696 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 2 Group Number: 17 Group Name: Halogen What's in a name? From the Latin and French words for flow, fluere. Say what? Fluorine is pronounced as FLU-eh-reen or as FLU-eh-rin. History and Uses: Fluorine is the most reactive of all elements and no chemical substance is capable of freeing fluorine from any of its compounds. For this reason, fluorine does not occur free in nature and was extremely difficult for

182

It's Elemental - The Element Zinc  

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Copper Copper Previous Element (Copper) The Periodic Table of Elements Next Element (Gallium) Gallium The Element Zinc [Click for Isotope Data] 30 Zn Zinc 65.38 Atomic Number: 30 Atomic Weight: 65.38 Melting Point: 692.68 K (419.53°C or 787.15°F) Boiling Point: 1180 K (907°C or 1665°F) Density: 7.134 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 12 Group Name: none What's in a name? From the German word zink. Say what? Zinc is pronounced as ZINK. History and Uses: Although zinc compounds have been used for at least 2,500 years in the production of brass, zinc wasn't recognized as a distinct element until much later. Metallic zinc was first produced in India sometime in the 1400s by heating the mineral calamine (ZnCO3) with wool. Zinc was rediscovered by

183

It's Elemental - The Element Chlorine  

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Sulfur Sulfur Previous Element (Sulfur) The Periodic Table of Elements Next Element (Argon) Argon The Element Chlorine [Click for Isotope Data] 17 Cl Chlorine 35.453 Atomic Number: 17 Atomic Weight: 35.453 Melting Point: 171.65 K (-101.5°C or -150.7°F) Boiling Point: 239.11 K (-34.04°C or -29.27°F) Density: 0.003214 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 3 Group Number: 17 Group Name: Halogen What's in a name? From the Greek word for greenish yellow, chloros. Say what? Chlorine is pronounced as KLOR-een or as KLOR-in. History and Uses: Since it combines directly with nearly every element, chlorine is never found free in nature. Chlorine was first produced by Carl Wilhelm Scheele, a Swedish chemist, when he combined the mineral pyrolusite (MnO2) with

184

Trace Metal Source Terms in Carbon Sequestration Environments  

Science Conference Proceedings (OSTI)

ABSTRACT: Carbon dioxide sequestration in deep saline and depleted oil geologic formations is feasible and promising; however, possible CO2 or CO2-saturated brine leakage to overlying aquifers may pose environmental and health impacts. The purpose of this study was to experimentally define to provide a range of concentrations that can be used as the trace element source term for reservoirs and leakage pathways in risk simulations. Storage source terms for trace metals are needed to evaluate the impact of brines leaking into overlying drinking water aquifers. The trace metal release was measured from cements and sandstones, shales, carbonates, evaporites, and basalts from the Frio, In Salah, Illinois Basin, Decatur, Lower Tuscaloosa, Weyburn-Midale, Bass Islands, and Grand Ronde carbon sequestration geologic formations. Trace metal dissolution was tracked by measuring solution concentrations over time under conditions (e.g., pressures, temperatures, and initial brine compositions) specific to the sequestration projects. Existing metrics for maximum contaminant levels (MCLs) for drinking water as defined by the U.S. Environmental Protection Agency (U.S. EPA) were used to categorize the relative significance of metal concentration changes in storage environments because of the presence of CO2. Results indicate that Cr and Pb released from sandstone reservoir and shale cap rocks exceed the MCLs byan order of magnitude, while Cd and Cu were at or below drinking water thresholds. In carbonate reservoirs As exceeds the MCLs by an order of magnitude, while Cd, Cu, and Pb were at or below drinking water standards. Results from this study can be used as a reasonable estimate of the trace element source term for reservoirs and leakage pathways in risk simulations to further evaluate the impact of leakage on groundwater quality.

Karamalidis, Athanasios; Torres, Sharon G.; Hakala, Jacqueline A.; Shao, Hongbo; Cantrell, Kirk J.; Carroll, Susan A.

2013-01-01T23:59:59.000Z

185

FUEL ELEMENT  

DOE Patents (OSTI)

A ceramic fuel element for a nuclear reactor that has improved structural stability as well as improved cooling and fission product retention characteristics is presented. The fuel element includes a plurality of stacked hollow ceramic moderator blocks arranged along a tubular raetallic shroud that encloses a series of axially apertured moderator cylinders spaced inwardly of the shroud. A plurality of ceramic nuclear fuel rods are arranged in the annular space between the shroud and cylinders of moderator and appropriate support means and means for directing gas coolant through the annular space are also provided. (AEC)

Bean, R.W.

1963-11-19T23:59:59.000Z

186

It's Elemental - Isotopes of the Element Thorium  

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Table of Elements Next Element (Protactinium) Protactinium Isotopes of the Element Thorium Click for Main Data Most of the isotope data on this site has been obtained from...

187

It's Elemental - The Element Iodine  

NLE Websites -- All DOE Office Websites (Extended Search)

Tellurium Tellurium Previous Element (Tellurium) The Periodic Table of Elements Next Element (Xenon) Xenon The Element Iodine [Click for Isotope Data] 53 I Iodine 126.90447 Atomic Number: 53 Atomic Weight: 126.90447 Melting Point: 386.85 K (113.7°C or 236.7°F) Boiling Point: 457.55 K (184.4°C or 364.0°F) Density: 4.93 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Non-metal Period Number: 5 Group Number: 17 Group Name: Halogen What's in a name? From the Greek word for violet, iodes. Say what? Iodine is pronounced as EYE-eh-dine or as EYE-eh-din. History and Uses: Iodine was discovered by the French chemist Barnard Courtois in 1811. Courtois was extracting sodium and potassium compounds from seaweed ash. Once these compounds were removed, he added sulfuric acid (H2SO4) to

188

It's Elemental - The Element Lead  

NLE Websites -- All DOE Office Websites (Extended Search)

Thallium Thallium Previous Element (Thallium) The Periodic Table of Elements Next Element (Bismuth) Bismuth The Element Lead [Click for Isotope Data] 82 Pb Lead 207.2 Atomic Number: 82 Atomic Weight: 207.2 Melting Point: 600.61 K (327.46°C or 621.43°F) Boiling Point: 2022 K (1749°C or 3180°F) Density: 11.342 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 14 Group Name: none What's in a name? From the Anglo-Saxon word lead. Lead's chemical symbol comes from the Latin word for waterworks, plumbum. Say what? Lead is pronounced as LED. History and Uses: Lead has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores galena (PbS), anglesite (PbSO4), cerussite (PbCO3) and minum (Pb3O4). Although lead makes up only

189

Base Elements  

Science Conference Proceedings (OSTI)

Table 4   Principal effects of superalloy base elements on alloy characteristics...to γ? or γ? Requires fcc stabilizer Cobalt prices have been known to be volatile in the past. Suitable for creep-resistant applications with low stresses or

190

Trace Metals in Oil Laboratory Proficiency Program  

Science Conference Proceedings (OSTI)

Lab Proficiency Testing service for Trace Metals in Oil. Soybean oil sample to test for Iron, Copper, and Nickel using AOCS Official method Ca 18-79. Trace Metals in Oil Laboratory Proficiency Program Laboratory Proficiency Program (LPP) aocs applicants

191

Distributed trace using central performance counter memory  

SciTech Connect

A plurality of processing cores, are central storage unit having at least memory connected in a daisy chain manner, forming a daisy chain ring layout on an integrated chip. At least one of the plurality of processing cores places trace data on the daisy chain connection for transmitting the trace data to the central storage unit, and the central storage unit detects the trace data and stores the trace data in the memory co-located in with the central storage unit.

Satterfield, David L.; Sexton, James C.

2013-01-22T23:59:59.000Z

192

Distributed trace using central performance counter memory  

Science Conference Proceedings (OSTI)

A plurality of processing cores, are central storage unit having at least memory connected in a daisy chain manner, forming a daisy chain ring layout on an integrated chip. At least one of the plurality of processing cores places trace data on the daisy chain connection for transmitting the trace data to the central storage unit, and the central storage unit detects the trace data and stores the trace data in the memory co-located in with the central storage unit.

Satterfield, David L; Sexton, James C

2013-10-22T23:59:59.000Z

193

Badly Shaped Elements (BadlyShapedElements)  

Science Conference Proceedings (OSTI)

... shaped elements. Synopsis. BadlyShapedElements ( threshold ). Details. Base class: SkelModTargets; Parameters: threshold The threshold shape ...

2013-07-05T23:59:59.000Z

194

FUEL ELEMENT  

DOE Patents (OSTI)

A fuel element was developed for a gas cooled nuclear reactor. The element is constructed in the form of a compacted fuel slug including carbides of fissionable material in some cases with a breeder material carbide and a moderator which slug is disposed in a canning jacket of relatively impermeable moderator material. Such canned fuel slugs are disposed in an elongated shell of moderator having greater gas permeability than the canning material wherefore application of reduced pressure to the space therebetween causes gas diffusing through the exterior shell to sweep fission products from the system. Integral fission product traps and/or exterior traps as well as a fission product monitoring system may be employed therewith. (AEC)

Fortescue, P.; Zumwalt, L.R.

1961-11-28T23:59:59.000Z

195

Standard Elements  

Science Conference Proceedings (OSTI)

Table 1   ASTM standards applicable to element-level testing of composites...Composite Plates Subjected to a Distributed Load Plate flexure D 6484 Open-Hole Compression Strength of Polymer Matrix Composites Open-hole compression strength Z 5370Z Compression After Impact Strength of Fiber-Resin Composites Compression after impact Z 7225Z Mixed Mode I-Mode II...

196

Method of determining lanthanidies in a transition element host  

DOE Patents (OSTI)

A phosphor composition contains a lanthanide activator element within a host matrix having a transition element as a major component. The host matrix is composed of certain rare earth phosphates or vanadates such as YPO.sub.4 with a portion of the rare earth replaced with one or more of the transition elements. On X-ray or other electromagnetic excitation, trace lanthanide impurities or additives within the phosphor are spectrometrically determined from their characteristic luminescence.

De Kalb, Edward L. (Ames, IA); Fassel, Velmer A. (Ames, IA)

1976-02-03T23:59:59.000Z

197

It's Elemental - Isotopes of the Element Mendelevium  

NLE Websites -- All DOE Office Websites (Extended Search)

The Periodic Table of Elements Next Element (Nobelium) Nobelium Isotopes of the Element Mendelevium Click for Main Data Most of the isotope data on this site has been obtained...

198

It's Elemental - Isotopes of the Element Uranium  

NLE Websites -- All DOE Office Websites (Extended Search)

Periodic Table of Elements Next Element (Neptunium) Neptunium Isotopes of the Element Uranium Click for Main Data Most of the isotope data on this site has been obtained from...

199

It's Elemental - Isotopes of the Element Lithium  

NLE Websites -- All DOE Office Websites (Extended Search)

Periodic Table of Elements Next Element (Beryllium) Beryllium Isotopes of the Element Lithium Click for Main Data Most of the isotope data on this site has been obtained from...

200

It's Elemental - Isotopes of the Element Hydrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

The Periodic Table of Elements Next Element (Helium) Helium Isotopes of the Element Hydrogen Click for Main Data Most of the isotope data on this site has been obtained from...

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Linear driving force models for dynamic adsorption of volatile organic compound traces by porous adsorbent beds  

Science Conference Proceedings (OSTI)

Models for the dynamic adsorption of volatile organic compound (VOC) traces in air are considered. They are based on the linear driving force approximation associated with various adsorption isotherms characteristic of the couple VOC-adsorbent (Langmuir, ... Keywords: Comsol, Dubinin-Astakhov isotherm, Dynamic adsorption modelling, Finite element

Agns Joly; Alain Perrard

2009-08-01T23:59:59.000Z

202

Trace gases could double climate warming  

SciTech Connect

The atmospheric concentrations of several trace gases capable of changing the climate are increasing. Researchers are concerned about the trace gases despite their miniscule concentrations because they are such efficient absorbers of far-infrared radiation. The trace gases that concern climatologists are methane, nitrous oxide, and the chlorofluorocarbons or CFC's. The increase in atmospheric concentrations of these gases are discussed and atmospheric models predicting their greenhouse effect are described.

Kerr, R.A.

1983-06-24T23:59:59.000Z

203

Visualization and observations on traces - CECM  

E-Print Network (OSTI)

Nov 19, 1997 ... A similar quality appears in resulting columns of a 2-trace operation with the difference that the pattern now merges aspects of the truth table...

204

Measurement of Trace Uranium Isotopes  

Science Conference Proceedings (OSTI)

The extent to which thermal ionization mass spectrometry (TIMS) can measure trace quantities of 233U and 236U in the presence of a huge excess of natural uranium is evaluated. This is an important nuclear non-proliferation measurement. Four ion production methods were evaluated with three mass spectrometer combinations. The most favorable combinations are not limited by abundance sensitivity; rather, the limitations are the ability to generate a uranium ion beam of sufficient intensity to obtain the required number of counts on the minor isotopes in relationship to detector background. The most favorable situations can measure isotope ratios in the range of E10 if sufficient sample intensity is available. These are the triple sector mass spectrometer with porous ion emitters (PIE) and the single sector mass spectrometer with energy filtering.

Matthew G. Watrous; James E. Delmore

2011-05-01T23:59:59.000Z

205

Oxidation of elemental mercury by chlorine: Gas phase, Surface, and Photo-induced reaction pathways  

E-Print Network (OSTI)

of Air Quality III: Mercury, Trace Elements, and Particulate34, 2711. 7. Sloss, L.L. Mercury Emissions and Control.1996 , Jan. , 60 pp. 2. Mercury Study Report to Congress;

Yan, Nai-Qiang; Liu, Shou-Heng; Chang, Shih-Ger

2004-01-01T23:59:59.000Z

206

Diagnostic tracing for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are typically deployed in harsh environments, thus post-deployment failures are not infrequent. An execution trace containing events in their order of execution could play a crucial role in postmortem diagnosis of these failures. ... Keywords: Embedded debugging, diagnosis, tracing, wireless sensor networks

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang; Vamsidhar Addanki

2013-07-01T23:59:59.000Z

207

CX-001451: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Determination CX-001451: Categorical Exclusion Determination Fate and Control of Mercury and Trace Elements CX(s) Applied: B3.6 Date: 03312010 Location(s): Grand Forks,...

208

TBBT: scalable and accurate trace replay for file server evaluation  

Science Conference Proceedings (OSTI)

This paper describes the design, implementation, and evaluation of TBBT, the first comprehensive NFS trace replay tool. Given an NFS trace, TBBT automatically detects and repairs missing operations in the trace, derives a file system image required to ...

Ningning Zhu; Jiawu Chen; Tzi-Cker Chiueh

2005-12-01T23:59:59.000Z

209

Easy system call tracing for Plan 9.  

SciTech Connect

Tracing system calls makes debugging easy and fast. On Plan 9, traditionally, system call tracing has been implemented with acid. New systems do not always implement all the capabilities needed for Acid, particularly the ability to rewrite the process code space to insert breakpoints. Architecture support libraries are not always available for Acid, or may not work even on a supported architecture. The requirement that Acid's libraries be available can be a problem on systems with a very small memory footprint, such as High Performance Computing systems where every Kbyte counts. Finally, Acid tracing is inconvenient in the presence of forks, which means tracing shell pipelines is particularly troublesome. The strace program available on most Unix systems is far more convenient to use and more capable than Acid for system call tracing. A similar system on Plan 9 can simplify troubleshooting. We have built a system calling tracing capability into the Plan 9 kernel. It has proven to be more convenient than strace in programming effort. One can write a shell script to implement tracing, and the C code to implement an strace equivalent is several orders of magnitude smaller.

Minnich, Ronald G.

2010-09-01T23:59:59.000Z

210

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID...  

Open Energy Info (EERE)

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: TRACING...

211

Accelerating ray tracing using constrained tetrahedralizations  

Science Conference Proceedings (OSTI)

In this paper we introduce the constrained tetrahedralization as a new acceleration structure for ray tracing. A constrained tetrahedralization of a scene is a tetrahedralization that respects the faces of the scene geometry. The closest intersection ...

Ares Lagae; Philip Dutr

2008-06-01T23:59:59.000Z

212

Definition of the n-Trace - CECM  

E-Print Network (OSTI)

Nov 19, 1997 ... Definition of the n-Trace. Suppose $\\Sigma$ is a set of inputs $\\Sigma = \\{\\ alpha_1,\\alpha_2,\\alpha_3.. . Then the set $\\wp(\\Sigma)$...

213

Extraction of trace metals from fly ash  

DOE Patents (OSTI)

A process for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous, the fly ash having a silicate base and containing surface deposits of the trace metals as oxides, chlorides or the like, with the process being carried out by contacting the fly ash with AlCl.sub.3 in an alkali halide melt to react the trace metals with the AlCl.sub.3 to form compositions soluble in the melt and a residue containing the silicate and aluminum oxide or other aluminum precipitate, and separating the desired trace metal or metals from the melt by electrolysis or other separation techniques.

Blander, Milton (Palos Park, IL); Wai, Chien M. (Moscow, ID); Nagy, Zoltan (Woodridge, IL)

1984-01-01T23:59:59.000Z

214

Extraction of trace metals from fly ash  

DOE Patents (OSTI)

A process is described for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous. The fly ash has a silicate base and contains surface deposits of the trace metals as oxides, chlorides or the like. The process is carried out by contacting the fly ash with AlCl/sub 3/ in an alkali halide melt to react the trace metals with the AlCl/sub 3/ to form compositions soluble in the melt and a residue containing the silicate and aluminum oxide or other aluminum precipitate, and separating the desired trace metal or metals from the melt by electrolysis or other separation techniques.

Blander, M.; Wai, C.M.; Nagy, Z.

1983-08-15T23:59:59.000Z

215

Trace metals in heavy crude oils and tar sand bitumens  

SciTech Connect

Fe, Ni, and V are considered trace impurities in heavy crude oils and tar sand bitumens. In order to understand the importance of these metals, we have examined several properties: (1) bulk metals levels, (2) distribution in separated fractions, (3) size behavior in feeds and during processing, (4) speciation as a function of size, and (5) correlations with rheological properties. Some of the results of these studies show: (1) V and Ni have roughly bimodal size distributions, (2) groupings were seen based on location, size distribution, and Ni/V ratio of the sample, (3) Fe profiles are distinctively different, having a unimodal distribution with a maximum at relatively large molecular size, (4) Fe concentrations in the tar sand bitumens suggest possible fines solubilization in some cases, (5) SARA separated fractions show possible correlations of metals with asphaltene properties suggesting secondary and tertiary structure interactions, and (6) ICP-MS examination for soluble ultra-trace metal impurities show the possibility of unexpected elements such as U, Th, Mo, and others at concentrations in the ppB to ppM range. 39 refs., 13 figs., 5 tabs.

Reynolds, J.G.

1990-11-28T23:59:59.000Z

216

Prius: generic hybrid trace compression for wireless sensor networks  

Science Conference Proceedings (OSTI)

Several diagnostic tracing techniques (e.g., event, power, and control-flow tracing) have been proposed for run-time debugging and postmortem analysis of wireless sensor networks (WSNs). Traces generated by such techniques can become large, defying the ... Keywords: compression, sensor networks, tracing

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang

2012-11-01T23:59:59.000Z

217

Compound and Elemental Analysis At Northern Basin & Range Region  

Open Energy Info (EERE)

(Coolbaugh, Et Al., 2010) (Coolbaugh, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Northern Basin & Range Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for

218

Compound and Elemental Analysis At Central Nevada Seismic Zone Region  

Open Energy Info (EERE)

Nevada Nevada Seismic Zone Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium

219

Concentrations and Origins of Atmospheric Lead and Other Trace Species at a Rural Site in Northern China  

E-Print Network (OSTI)

grade HNO3 (6 mL) and HCl (2 mL) for 40 min, using a microwave sample digestion system (PerkinElmer Life factor of 2 is applied to the Al concentration. An inductively coupled plasma mass spectrometer (ICP), The fate of trace elements during coal combustion and gasification: an overview, Fuel, 72, 731-736. Díaz

Dickerson, Russell R.

220

Trace metal speciation in saline waters affected by geothermal brines. [GEOCHEM  

DOE Green Energy (OSTI)

A description is given of the chemical equilibrium computer program GEOCHEM, which has been developed to calculate trace element speciation in soil, irrigation, drainage, or Salton Sea waters affected by geothermal brine. GEOCHEM is applied to irrigation water-brine mixtures and to Salton Sea water-brine mixtures in order to compute the chemical speciation of the elements Cd, Cu, Hg, Ni, Pb, and Zn, along with the oxyanions of As and B. The results suggest that the computer simulation can have an important effect on a program for managing brine spills. Appendices include published papers on related research.

Sposito, G.; Page, A.L.

1977-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Investigations on the sediment chronology and trace metal accumulation in Sabine-Neches estuary, Beaumont, Texas  

E-Print Network (OSTI)

The accumulation rates of sediments and trace metals (Co, Cr, Cu, Ni, Pb, Zn) were measured along with the concentrations of Al, Fe, Mn and organic carbon in four sediment cores from Sabine-Neches estuary, near Beaumont, Texas. A reliable geochronology of sediments and reconstruction of the history of trace metal inputs into this shallow estuarine environment was possible because the 239,240pu profiles closely tracked the bomb fallout history into the environment. The sedimentation rate was estimated to be about 4-5 mm/yr. Due to the very low and variable activities of excess 21OPb in the sediments, the 21OPb dating method did not prove to be very useful in the study area. One difficulty had to do with the large variability of grain size parameters in the sediments. The amount of fines varied from 90% within a single core. The activities of excess 21OPb and the concentrations of Al, Fe, organic carbon, and trace metals varied as a function of the amount of fine particles. 21OPb at the bottom of the sediment cores was in secular equilibrium with 226Ra, 23OTh, and 234U in some cores, while in others, this was not the case. The reasons for disagreement between 21OPb and 226Ra concentrations at depth were investigated. The mixing rates of surface sediments were low and was about 0.16-0.40 cm2yr-1. Down core variations of aluminum normalized enrichment factors for trace metals demonstrated that, since 1860, the sediments of this estuary have remained relatively "pristine" with respect to trace metal concentrations. While the concentrations of Pb and Zn in some sections of the sediment column were slightly enriched, Co, Cr, Cu, and Ni were depleted in all sediment cores analyzed. No significant enrichment of light rare earth elements was observed. Enrichment might have been expected from inputs of cracking catalysts used in refineries. Therefore REEs could not be used as non-steady tracers. The lack of strong enrichment of trace metals, light rare earth elements, and low inventories of radioisotopes could be a result of the short residence time of the estuarine water, long removal residence times of trace metals and radioactive elements in the water column, low salinity conditions, and possibly, complexation of these metals with dissolved organic matter.

Ravichandran, Mahalingam

1994-01-01T23:59:59.000Z

222

Tracing Noble Gas Radionuclides in the Environment  

E-Print Network (OSTI)

Trace analysis of radionuclides is an essential and versatile tool in modern science and technology. Due to their ideal geophysical and geochemical properties, long-lived noble gas radionuclides, in particular, 39Ar (t1/2 = 269 yr), 81Kr (t1/2 = 2.3x10^5 yr) and 85Kr (t1/2 = 10.8 yr), have long been recognized to have a wide range of important applications in Earth sciences. In recent years, significant progress has been made in the development of practical analytical methods, and has led to applications of these isotopes in the hydrosphere (tracing the flow of groundwater and ocean water). In this article, we introduce the applications of these isotopes and review three leading analytical methods: Low-Level Counting (LLC), Accelerator Mass Spectrometry (AMS) and Atom Trap Trace Analysis (ATTA).

P. Collon; W. Kutschera; Z. -T. Lu

2004-02-11T23:59:59.000Z

223

Building Energy Software Tools Directory: TRACE 700  

NLE Websites -- All DOE Office Websites (Extended Search)

700 700 TRACE 700 logo. Trane's TRACE 700 software - the latest version of Trane Air Conditioning Economics - brings the algorithms recommended by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to the familiar Windows operating environment. Use it to assess the energy and economic impacts of building-related selections such as architectural features, comfort-system design, HVAC equipment selections, operating schedules, and financial options. Flexible data entry, coupled with multiple views and "drag-and-drop" load assignments, simplify the modeling process and help you identify optimal zoning and plant configurations. Compare up to four alternatives for a single project by modeling various air distribution and mechanical

224

Title Offline Trace Synchronization for Smartphone Energy Profiling  

E-Print Network (OSTI)

Energy profiling is a means to effectively understand the power behavior of smartphone applications. However, no tool that effectively combines portability, accuracy and automation has been proposed yet. In this thesis a new approach is proposed, which sets the basis for such a tool by solving a trace synchronization problem. TRAM (TRAce Merger) uses the event trace from a mobile device and the power trace from a measurement device. It synchronizes them offline, maps the mobile device events trace on the corresponding trace from the power measurement tool, and attributes energy consumption to smartphone functionalities. The event and power traces traces from these two systems contain timestamps based on the corresponding local clocks. Taking the aforementioned clocks inaccuracy and deviation into account, we synchronize these traces to extract useful information from their contents. We achieved energy consumption attribution to smartphone functionalities by solving this synchronization problem with milliseconds accuracy.

Ioannis Oikonomidis; Offline Trace; Synchronization Smartphone; Ioannis Oikonomidis; Msc Presentation

2013-01-01T23:59:59.000Z

225

It's Elemental - Isotopes of the Element Boron  

NLE Websites -- All DOE Office Websites (Extended Search)

Beryllium Beryllium Previous Element (Beryllium) The Periodic Table of Elements Next Element (Carbon) Carbon Isotopes of the Element Boron [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 10 19.9% STABLE 11 80.1% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 6 No Data Available Double Proton Emission (suspected) No Data Available 7 3.255×10-22 seconds Proton Emission No Data Available Alpha Decay No Data Available 8 770 milliseconds Electron Capture 100.00% Electron Capture with delayed Alpha Decay 100.00% 9 8.439×10-19 seconds Proton Emission 100.00% Double Alpha Decay 100.00%

226

It's Elemental - Isotopes of the Element Tungsten  

NLE Websites -- All DOE Office Websites (Extended Search)

Tantalum Tantalum Previous Element (Tantalum) The Periodic Table of Elements Next Element (Rhenium) Rhenium Isotopes of the Element Tungsten [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 180 0.12% >= 6.6×10+17 years 182 26.50% STABLE 183 14.31% > 1.3×10+19 years 184 30.64% STABLE 186 28.43% > 2.3×10+19 years Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 157 275 milliseconds Electron Capture No Data Available 158 1.25 milliseconds Alpha Decay 100.00% 158m 0.143 milliseconds Isomeric Transition No Data Available Alpha Decay No Data Available 159 7.3 milliseconds Alpha Decay ~ 99.90%

227

It's Elemental - Isotopes of the Element Radon  

NLE Websites -- All DOE Office Websites (Extended Search)

Astatine Astatine Previous Element (Astatine) The Periodic Table of Elements Next Element (Francium) Francium Isotopes of the Element Radon [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Radon has no naturally occurring isotopes. Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 193 1.15 milliseconds Alpha Decay 100.00% 194 0.78 milliseconds Alpha Decay 100.00% 195 6 milliseconds Alpha Decay 100.00% 195m 5 milliseconds Alpha Decay 100.00% 196 4.4 milliseconds Alpha Decay 99.90% Electron Capture ~ 0.10% 197 53 milliseconds Alpha Decay 100.00% 197m 25 milliseconds Alpha Decay 100.00% 198 65 milliseconds Alpha Decay No Data Available

228

It's Elemental - Isotopes of the Element Carbon  

NLE Websites -- All DOE Office Websites (Extended Search)

Boron Boron Previous Element (Boron) The Periodic Table of Elements Next Element (Nitrogen) Nitrogen Isotopes of the Element Carbon [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 12 98.93% STABLE 13 1.07% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 8 1.981×10-21 seconds Proton Emission 100.00% Alpha Decay No Data Available 9 126.5 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 61.60% Electron Capture with delayed Alpha Decay 38.40% 10 19.308 seconds Electron Capture 100.00% 11 20.334 minutes Electron Capture 100.00% 12 STABLE - -

229

It's Elemental - Isotopes of the Element Rhenium  

NLE Websites -- All DOE Office Websites (Extended Search)

Tungsten Tungsten Previous Element (Tungsten) The Periodic Table of Elements Next Element (Osmium) Osmium Isotopes of the Element Rhenium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 185 37.40% STABLE 187 62.60% 4.33×10+10 years Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 159 No Data Available No Data Available No Data Available 160 0.82 milliseconds Proton Emission 91.00% Alpha Decay 9.00% 161 0.44 milliseconds Proton Emission 100.00% Alpha Decay <= 1.40% 161m 14.7 milliseconds Alpha Decay 93.00% Proton Emission 7.00% 162 107 milliseconds Alpha Decay 94.00% Electron Capture 6.00%

230

It's Elemental - Isotopes of the Element Magnesium  

NLE Websites -- All DOE Office Websites (Extended Search)

Sodium Sodium Previous Element (Sodium) The Periodic Table of Elements Next Element (Aluminum) Aluminum Isotopes of the Element Magnesium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 24 78.99% STABLE 25 10.00% STABLE 26 11.01% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 19 4.0 picoseconds Double Proton Emission 100.00% 20 90.8 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission ~ 27.00% 21 122 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 32.60% Electron Capture with delayed Alpha Decay < 0.50%

231

It's Elemental - Isotopes of the Element Chlorine  

NLE Websites -- All DOE Office Websites (Extended Search)

Sulfur Sulfur Previous Element (Sulfur) The Periodic Table of Elements Next Element (Argon) Argon Isotopes of the Element Chlorine [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 35 75.76% STABLE 37 24.24% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 28 No Data Available Proton Emission (suspected) No Data Available 29 < 20 nanoseconds Proton Emission No Data Available 30 < 30 nanoseconds Proton Emission No Data Available 31 150 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 0.70% 32 298 milliseconds Electron Capture 100.00%

232

It's Elemental - Isotopes of the Element Potassium  

NLE Websites -- All DOE Office Websites (Extended Search)

Argon Argon Previous Element (Argon) The Periodic Table of Elements Next Element (Calcium) Calcium Isotopes of the Element Potassium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 39 93.2581% STABLE 40 0.0117% 1.248×10+9 years 41 6.7302% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 32 No Data Available Proton Emission (suspected) No Data Available 33 < 25 nanoseconds Proton Emission No Data Available 34 < 25 nanoseconds Proton Emission No Data Available 35 178 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 0.37% 36 342 milliseconds Electron Capture 100.00%

233

It's Elemental - Isotopes of the Element Phosphorus  

NLE Websites -- All DOE Office Websites (Extended Search)

Silicon Silicon Previous Element (Silicon) The Periodic Table of Elements Next Element (Sulfur) Sulfur Isotopes of the Element Phosphorus [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 31 100% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 24 No Data Available Electron Capture (suspected) No Data Available Proton Emission (suspected) No Data Available 25 < 30 nanoseconds Proton Emission 100.00% 26 43.7 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission No Data Available 27 260 milliseconds Electron Capture 100.00% Electron Capture with

234

It's Elemental - Isotopes of the Element Francium  

NLE Websites -- All DOE Office Websites (Extended Search)

Radon Radon Previous Element (Radon) The Periodic Table of Elements Next Element (Radium) Radium Isotopes of the Element Francium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Francium has no naturally occurring isotopes. Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 199 12 milliseconds Alpha Decay > 0.00% Electron Capture No Data Available 200 49 milliseconds Alpha Decay 100.00% 201 62 milliseconds Alpha Decay 100.00% 201m 19 milliseconds Alpha Decay 100.00% 202 0.30 seconds Alpha Decay 100.00% 202m 0.29 seconds Alpha Decay 100.00% 203 0.55 seconds Alpha Decay <= 100.00% 204 1.8 seconds Alpha Decay 92.00%

235

It's Elemental - Isotopes of the Element Oxygen  

NLE Websites -- All DOE Office Websites (Extended Search)

Nitrogen Nitrogen Previous Element (Nitrogen) The Periodic Table of Elements Next Element (Fluorine) Fluorine Isotopes of the Element Oxygen [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 16 99.757% STABLE 17 0.038% STABLE 18 0.205% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 12 1.139×10-21 seconds Proton Emission No Data Available 13 8.58 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 100.00% 14 70.620 seconds Electron Capture 100.00% 15 122.24 seconds Electron Capture 100.00% 16 STABLE - - 17 STABLE - - 18 STABLE - - 19 26.88 seconds Beta-minus Decay 100.00%

236

It's Elemental - Isotopes of the Element Gallium  

NLE Websites -- All DOE Office Websites (Extended Search)

Zinc Zinc Previous Element (Zinc) The Periodic Table of Elements Next Element (Germanium) Germanium Isotopes of the Element Gallium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 69 60.108% STABLE 71 39.892% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 56 No Data Available Proton Emission (suspected) No Data Available 57 No Data Available Proton Emission (suspected) No Data Available 58 No Data Available Proton Emission (suspected) No Data Available 59 No Data Available Proton Emission (suspected) No Data Available 60 70 milliseconds Electron Capture 98.40%

237

It's Elemental - Isotopes of the Element Sodium  

NLE Websites -- All DOE Office Websites (Extended Search)

Neon Neon Previous Element (Neon) The Periodic Table of Elements Next Element (Magnesium) Magnesium Isotopes of the Element Sodium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 23 100% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 18 1.3×10-21 seconds Proton Emission 100.00% 19 < 40 nanoseconds Proton Emission No Data Available 20 447.9 milliseconds Electron Capture with delayed Alpha Decay 20.05% Electron Capture 100.00% 21 22.49 seconds Electron Capture 100.00% 22 2.6027 years Electron Capture 100.00% 23 STABLE - - 24 14.997 hours Beta-minus Decay 100.00%

238

It's Elemental - Isotopes of the Element Neon  

NLE Websites -- All DOE Office Websites (Extended Search)

Fluorine Fluorine Previous Element (Fluorine) The Periodic Table of Elements Next Element (Sodium) Sodium Isotopes of the Element Neon [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 20 90.48% STABLE 21 0.27% STABLE 22 9.25% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 16 9×10-21 seconds Double Proton Emission 100.00% 17 109.2 milliseconds Electron Capture with delayed Alpha Decay No Data Available Electron Capture 100.00% Electron Capture with delayed Proton Emission 100.00% 18 1.6670 seconds Electron Capture 100.00% 19 17.22 seconds Electron Capture 100.00% 20 STABLE - -

239

It's Elemental - Isotopes of the Element Copper  

NLE Websites -- All DOE Office Websites (Extended Search)

Nickel Nickel Previous Element (Nickel) The Periodic Table of Elements Next Element (Zinc) Zinc Isotopes of the Element Copper [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 63 69.15% STABLE 65 30.85% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 52 No Data Available Proton Emission No Data Available 53 < 300 nanoseconds Electron Capture No Data Available Proton Emission No Data Available 54 < 75 nanoseconds Proton Emission No Data Available 55 27 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 15.0% 56 93 milliseconds Electron Capture 100.00%

240

Spent fuel pool analysis using TRACE code  

SciTech Connect

The storage requirements of Spent Fuel Pools have been analyzed with the purpose to increase their rack capacities. In the past, the thermal limits have been mainly evaluated with conservative codes developed for this purpose, although some works can be found in which a best estimate code is used. The use of best estimate codes is interesting as they provide more realistic calculations and they have the capability of analyzing a wide range of transients that could affect the Spent Fuel Pool. Two of the most representative thermal-hydraulic codes are RELAP-5 and TRAC. Nowadays, TRACE code is being developed to make use of the more favorable characteristics of RELAP-5 and TRAC codes. Among the components coded in TRACE that can be used to construct the model, it is interesting to use the VESSEL component, which has the capacity of reproducing three dimensional phenomena. In this work, a thermal-hydraulic model of the Maine Yankee spent fuel pool using the TRACE code is developed. Such model has been used to perform a licensing calculation and the results obtained have been compared with experimental measurements made at the pool, showing a good agreement between the calculations predicted by TRACE and the experimental data. (authors)

Sanchez-Saez, F.; Carlos, S.; Villanueva, J. F.; Martorell, S. [Dept. of Chemical and Nuclear Engineering, Universitat Politenica de Valencia, Cami de Vera s/n, 46021, Valencia (Spain)

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Stochastic path tracing on consumer graphics cards  

Science Conference Proceedings (OSTI)

We present a path tracer using the GPU of a consumers graphics card to render images. It is implemented in Java and GLSL using GroIMP as modelling platform and runtime environment. The path tracer is capable of rendering primitives like sphere, cone, ... Keywords: GPU, HDR, global illumination, path tracing, procedural texturing, raytracing, texture mapping

Thomas Huwe; Reinhard Hemmerling

2008-04-01T23:59:59.000Z

242

NEUTRONIC REACTOR CONTROL ELEMENT  

DOE Patents (OSTI)

A boron-10 containing reactor control element wherein the boron-10 is dispersed in a matrix material is describeri. The concentration of boron-10 in the matrix varies transversely across the element from a minimum at the surface to a maximum at the center of the element, prior to exposure to neutrons. (AEC)

Beaver, R.J.; Leitten, C.F. Jr.

1962-04-17T23:59:59.000Z

243

Tracefs: a file system to trace them all  

Science Conference Proceedings (OSTI)

File system traces have been used for years to analyze user behavior and system software behavior, leading to advances in file system and storage technologies. Existing traces, however, are difficult to use because they were captured for a specific use ...

Akshat Aranya; Charles P. Wright; Erez Zadok

2004-03-01T23:59:59.000Z

244

Bunker: a privacy-oriented platform for network tracing  

Science Conference Proceedings (OSTI)

ISPs are increasingly reluctant to collect and store raw network traces because they can be used to compromise their customers' privacy. Anonymization techniques mitigate this concern by protecting sensitive information. Trace anonymization can be performed ...

Andrew G. Miklas; Stefan Saroiu; Alec Wolman; Angela Demke Brown

2009-04-01T23:59:59.000Z

245

On the privacy risks of publishing anonymized IP network traces  

Science Conference Proceedings (OSTI)

Networking researchers and engineers rely on network packet traces for understanding network behavior, developing models, and evaluating network performance. Although the bulk of published packet traces implement a form of address anonymization to hide ...

D. Koukis; S. Antonatos; K. G. Anagnostakis

2006-10-01T23:59:59.000Z

246

Trace metal speciation in saline waters affected by geothermal brines. Final technical report. [GEOCHEM  

DOE Green Energy (OSTI)

The computer program GEOCHEM was developed and applied to calculate the speciation of trace elements, such as Li, B, Mn, Co, Ni, Cu, Zn, Pb, and As, in mixtures of geothermal brines with soil waters. A typical speciation calculation involved the simultaneous consideration of about 350 inorganic and organic complexes and about 80 possible solid phases that could form among the macro- and microconstituents in the mixtures. The four geothermal brines chosen for study were from the East Mesa, Heber, and Salton Sea KGRA's. Two examples of East Mesa brine were employed in order to illustrate the effect of brine variability within a given KGRA. The soil waters chosen for study were the Holtville, Rosita, and Vint soil solutions and the Vail 4 drain water. These waters were mixed with the four brines to produce 1%, 5%, and 10% brine combinations. The combinations then were analyzed with the help of GEOCHEM and were interpreted in the context of two proposed general contamination scenarios. The results of the speciation calculations pointed to the great importance, in brine, of sulfide as a precipitating agent for trace metals and of borate as a trace metal-complexing ligand. In general, precipitation and/or exchange adsorption in soil were found to reduce the levels of trace metals well below harmful concentrations. The principal exceptions were Li and B, which did not precipitate and which were at or very hear harmful levels in the soil water-brine mixtures.

Sposito, G.

1979-07-01T23:59:59.000Z

247

Development of NIST Standard Reference Materials for Trace ...  

Science Conference Proceedings (OSTI)

... analytical measurements, consideration of suitable packaging, and investigation of ... provides trace levels of the plastic explosive Composition C4 ...

2012-11-16T23:59:59.000Z

248

Hierarchical probing for estimating the trace of the matrix inverse on toroidal lattices  

E-Print Network (OSTI)

The standard approach for computing the trace of the inverse of a very large, sparse matrix $A$ is to view the trace as the mean value of matrix quadratures, and use the Monte Carlo algorithm to estimate it. This approach is heavily used in our motivating application of Lattice QCD. Often, the elements of $A^{-1}$ display certain decay properties away from the non zero structure of $A$, but random vectors cannot exploit this induced structure of $A^{-1}$. Probing is a technique that, given a sparsity pattern of $A$, discovers elements of $A$ through matrix-vector multiplications with specially designed vectors. In the case of $A^{-1}$, the pattern is obtained by distance-$k$ coloring of the graph of $A$. For sufficiently large $k$, the method produces accurate trace estimates but the cost of producing the colorings becomes prohibitively expensive. More importantly, it is difficult to search for an optimal $k$ value, since none of the work for prior choices of $k$ can be reused.

Andreas Stathopoulos; Jesse Laeuchli; Kostas Orginos

2013-02-17T23:59:59.000Z

249

Ray-tracing Procedural Displacement Shaders  

E-Print Network (OSTI)

Displacement maps and procedural displacement shaders are a widely used approach of specifying geometric detail and increasing the visual complexity of a scene. While it is relatively straightforward to handle displacement shaders in pipeline based rendering systems such as the Reyes-architecture, it is much harder to efficiently integrate displacement-mapped surfaces in ray-tracers. Many commercial ray-tracers tessellate the surface into a multitude of small triangles. This introduces a series of problems such as excessive memory consumption and possibly undetected surface detail. In this paper we describe a novel way of ray-tracing procedural displacement shaders directly, that is, without introducing intermediate geometry. Affine arithmetic is used to compute bounding boxes for the shader over any range in the parameter domain. The method is comparable to the direct ray-tracing of B'ezier surfaces and implicit surfaces using B'ezier clipping and interval methods, respectively. Keyw...

Wolfgang Heidrich; Hans-peter Seidel

1998-01-01T23:59:59.000Z

250

The synthetic elements  

Science Conference Proceedings (OSTI)

Prior to 1940, the heaviest element known was uranium, discovered in 1789. Since that time the elements 93 through 109 have been synthesized and identified and the elements 43, 61, 85, and 87 which were missing form the periodic tables of the 1930's have been discovered. The techniques and problems involved in these discoveries and the placement of the transuranium elements in the periodic table will be discussed. The production and positive identification of elements heavier than Md (Z=101), which have very short half-lives and can only be produced an atom-at-a-time, are very difficult and there have been controversies concerning their discovery. Some of the new methods which have been developed and used in these studies will be described. The prospects for production of still heavier elements will be considered.

Hoffman, D.C.

1990-05-01T23:59:59.000Z

251

It's Elemental - Isotopes of the Element Nitrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Carbon Previous Element (Carbon) The Periodic Table of Elements Next Element (Oxygen) Oxygen Isotopes of the Element Nitrogen [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 14 99.636% STABLE 15 0.364% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 10 No Data Available Proton Emission 100.00% 11 5.49×10-22 seconds Proton Emission 100.00% 12 11.000 milliseconds Electron Capture 100.00% 13 9.965 minutes Electron Capture 100.00% 14 STABLE - - 15 STABLE - - 16 7.13 seconds Beta-minus Decay 100.00% Beta-minus Decay with delayed Alpha Decay 1.2×10-3 % 17 4.173 seconds Beta-minus Decay 100.00%

252

FUEL ELEMENT INTERLOCKING ARRANGEMENT  

DOE Patents (OSTI)

This patent relates to a system for mutually interlocking a multiplicity of elongated, parallel, coextensive, upright reactor fuel elements so as to render a laterally selfsupporting bundle, while admitting of concurrent, selective, vertical withdrawal of a sizeable number of elements without any of the remaining elements toppling, Each element is provided with a generally rectangular end cap. When a rank of caps is aligned in square contact, each free edge centrally defines an outwardly profecting dovetail, and extremitally cooperates with its adjacent cap by defining a juxtaposed half of a dovetail- receptive mortise. Successive ranks are staggered to afford mating of their dovetails and mortises. (AEC)

Fortescue, P.; Nicoll, D.

1963-01-01T23:59:59.000Z

253

ElementNodeIterator  

Science Conference Proceedings (OSTI)

... iter=element->node_iterator(); !iter.end(); ++iter) { Node *node = iter.node(); // do something ... node returns a pointer to the iterator's current Node . ...

2013-08-23T23:59:59.000Z

254

ScalaTrace: Tracing, Analysis and Modeling of HPC Codes at Scale  

Science Conference Proceedings (OSTI)

Characterizing the communication behavior of large-scale applications is a difficult and costly task due to code/system complexity and their long execution times. An alternative to running actual codes is to gather their communication traces and then replay them, which facilitates application tuning and future procurements. While past approaches lacked lossless scalable trace collection, we contribute an approach that provides orders of magnitude smaller, if not near constant-size, communication traces regardless of the number of nodes while preserving structural information. We introduce intra- and inter-node compression techniques of MPI events, we develop a scheme to preserve time and causality of communication events, and we present results of our implementation for BlueGene/L. Given this novel capability, we discuss its impact on communication tuning and on trace extrapolation. To the best of our knowledge, such a concise representation of MPI traces in a scalable manner combined with time-preserving deterministic MPI call replay are without any precedence.

Mueller, F; Wu, X; Schulz, M; de Supinski, B; Gamblin, T

2010-03-31T23:59:59.000Z

255

Larval Behavior and Natural Trace Element Signatures as Indicators of Crustacean Population Connectivity  

E-Print Network (OSTI)

either nearshore or offshore. Larval vertical positions incrassipes) that develop offshore stayed high in the waterwhere persistent winds and offshore surface currents could

Miller, Seth Haylen

2011-01-01T23:59:59.000Z

256

Mobilization of trace elements in aquifers by biodegradation of hydrocarbon contaminants. Master Thesis  

Science Conference Proceedings (OSTI)

This study had two objectives: (1) to determine the extent of metal mobility within petroleum-contaminated aquifers, (2) to determine if biodegradation of petroleum hydrocarbons can explain metal mobility. The approach reviewed analytical results from 2305 groundwater sampling events, taken from 958 wells, located at 136 sites found at 53 Air Force installations. The study showed that high levels of metals are present at petroleum hydrocarbon sites where metals would not generally be expected. Of the metals with drinking water maximum contaminant levels (MCLs), mercury and silver were detected the least frequently. Barium and copper were detected at the sites, but fewer than 2.5 percent of the samples exceeded their MCLs. All other metals exceeded their MCLs in at least 2.5 percent of the samples, with antimony and lead exceeding their MCLs in 19 percent and 10 percent of samples, respectively. Higher concentrations of barium and manganese were most strongly correlated with petroleum hydrocarbon contamination, and relatively strong correlations also existed for aluminum, arsenic, iron, and lead. Major cations such as calcium, magnesium, sodium and potassium were least affected by petroleum hydrocarbons concentrations.

Kearney, S.L.

1997-12-01T23:59:59.000Z

257

The Effect of Two Trace Elements on Creep Rupture Properties and ...  

Science Conference Proceedings (OSTI)

D. W. Palmber, G. E. Riach, R. E. Weber and N. C. Macdonald: "Handbook of Auger ... F. Garofalo: "Fundamentals of Creep and Creep Rupture in Metals,".

258

Trace element concentrations in the Pacific harbor seal (Phoca vitulina richardii) in central  

E-Print Network (OSTI)

Applied to Bridge Decks...................67 Taconite Enhanced Pothole Repair Using Portable Microwave as a baseline for potential combustion and/or gasification testing at CMRL. Other research may arise from. Plasma Stone from Taconite By-Products Progress was made on casting three-dimensional shapes from molten

Wagner, Diane

259

Selected Trace Elements in the Sacramento River, California: Occurrence and Distribution  

E-Print Network (OSTI)

(Gaillardet et al. 2003; Alpers et al. 2000a). Drainage from abandoned or inactive mines, such as those, thallium, thulium, uranium, vanadium, tungsten, yttrium, ytterbium, zinc, and zirconium--were measured ranged from 900 lg/L at Spring Creek (Iron Mountain acid mine drainage into Keswick Reservoir) to 0.65 lg

260

Statewide Evaluation of Trace Element Accumulation from Long-Term Disposal of Wastewater  

E-Print Network (OSTI)

stimulate contamination from fallout. Erhardt, W. H. , andsurface 0-4 to aerial fallout from a road located nearby.likely due to aerial fallout. The Occidental pastureland

Olson, Betty H; Hill, Deborah C; Rigby, Martin G

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Chemical studies of selected trace elements in hot-spring drainages of Yellowstone National Park  

Science Conference Proceedings (OSTI)

Intensive chemical studies were made of S(-II), O/sub 2/, Al, Fe, Mn, P, As(III), As(V), and Li in waters from two high-Cl, low Ca-Mg hotspring drainages in the Lower Geyser Basin, a warm spring system rich in Ca and Mg in the Yellowstone Canyon area, and the Madison River system above Hebgen Lake. Analyses were also made of other representative thermal waters from the Park.

Stauffer, R.E.; Jenne, E.A.; Ball, J.W.

1980-01-01T23:59:59.000Z

262

Surface kinetic model for isotopic and trace element fractionation during precipitation of calcite from aqueous solution  

E-Print Network (OSTI)

of ice crystals is limited by vapor phase transportto the ice surface, the difference in vapor phaseO in the vapor phase. Hence ice condensation (or

DePaolo, D.

2011-01-01T23:59:59.000Z

263

Effect of Processing Mode on Trace Elements in Dewatered Sludge Products Brian K. Richards1  

E-Print Network (OSTI)

-added product, such as pellets, heat, power, ethanol, or chemicals. In addition to various kinds of chips of fossil fuels. Woody biomass, or forest biomass, also comes in a variety of forms as forest products. Wood. The kind of product manufactured in the woods is important to mills that produce the next value

Walter, M.Todd

264

Major, minor and trace elements in direct coal liquefaction: effect on conversion and partitioning behavior.  

E-Print Network (OSTI)

??With current concerns of depleting oil sources and the environmental impacts of off-shore drilling, the interest in liquid transportation fuels derived from coal is increasing. (more)

Luchner, Sarah

2010-01-01T23:59:59.000Z

265

NEUTRONIC REACTOR FUEL ELEMENT  

DOE Patents (OSTI)

A reactor fuel element of the capillary tube type is described. The element consists of a thin walled tube, sealed at both ends, and having an interior coatlng of a fissionable material, such as uranium enriched in U-235. The tube wall is gas tight and is constructed of titanium, zirconium, or molybdenum.

Kesselring, K.A.; Seybolt, A.U.

1958-12-01T23:59:59.000Z

266

Compound and Elemental Analysis At Nw Basin & Range Region (Coolbaugh, Et  

Open Energy Info (EERE)

10) 10) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At NW Basin & Range Region (Coolbaugh, Et Al., 2010) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa

267

Neutronic fuel element fabrication  

SciTech Connect

This disclosure describes a method for metallurgically bonding a complete leak-tight enclosure to a matrix-type fuel element penetrated longitudinally by a multiplicity of coolant channels. Coolant tubes containing solid filler pins are disposed in the coolant channels. A leak-tight metal enclosure is then formed about the entire assembly of fuel matrix, coolant tubes and pins. The completely enclosed and sealed assembly is exposed to a high temperature and pressure gas environment to effect a metallurgical bond between all contacting surfaces therein. The ends of the assembly are then machined away to expose the pin ends which are chemically leached from the coolant tubes to leave the coolant tubes with internal coolant passageways. The invention described herein was made in the course of, or under, a contract with the U.S. Atomic Energy Commission. It relates generally to fuel elements for neutronic reactors and more particularly to a method for providing a leak-tight metal enclosure for a high-performance matrix-type fuel element penetrated longitudinally by a multiplicity of coolant tubes. The planned utilization of nuclear energy in high-performance, compact-propulsion and mobile power-generation systems has necessitated the development of fuel elements capable of operating at high power densities. High power densities in turn require fuel elements having high thermal conductivities and good fuel retention capabilities at high temperatures. A metal clad fuel element containing a ceramic phase of fuel intimately mixed with and bonded to a continuous refractory metal matrix has been found to satisfy the above requirements. Metal coolant tubes penetrate the matrix to afford internal cooling to the fuel element while providing positive fuel retention and containment of fission products generated within the fuel matrix. Metal header plates are bonded to the coolant tubes at each end of the fuel element and a metal cladding or can completes the fuel-matrix enclosure by encompassing the sides of the fuel element between the header plates.

Korton, George (Cincinnati, OH)

2004-02-24T23:59:59.000Z

268

NEUTRONIC REACTOR FUEL ELEMENT  

DOE Patents (OSTI)

A fuel element possessing good stability and heat conducting properties is described. The fuel element comprises an outer tube formed of material selected from the group consisting of stainhess steel, V, Ti. Mo. or Zr, a fuel tube concentrically fitting within the outer tube and containing an oxide of an isotope selected from the group consisting of U/sup 235/, U/sup 233/, and Pu/sup 239/, and a hollow, porous core concentrically fitting within the fuel tube and formed of an oxide of an element selected from the group consisting of Mg, Be, and Zr.

Shackleford, M.H.

1958-12-16T23:59:59.000Z

269

ScalaTrace: Scalable Compression and Replay of Communication Traces for High Performance Computing  

Science Conference Proceedings (OSTI)

Characterizing the communication behavior of large-scale applications is a difficult and costly task due to code/system complexity and long execution times. While many tools to study this behavior have been developed, these approaches either aggregate information in a lossy way through high-level statistics or produce huge trace files that are hard to handle. We contribute an approach that provides orders of magnitude smaller, if not near-constant size, communication traces regardless of the number of nodes while preserving structural information. We introduce intra- and inter-node compression techniques of MPI events that are capable of extracting an application's communication structure. We further present a replay mechanism for the traces generated by our approach and discuss results of our implementation for BlueGene/L. Given this novel capability, we discuss its impact on communication tuning and beyond. To the best of our knowledge, such a concise representation of MPI traces in a scalable manner combined with deterministic MPI call replay are without any precedent.

Noeth, M; Ratn, P; Mueller, F; Schulz, M; de Supinski, B R

2008-05-16T23:59:59.000Z

270

SOFC Anode Interaction with Trace Coal Syngas Species U.S. Dept of Energy, National Energy Technology Laboratory, Morgantown, WV 26507  

NLE Websites -- All DOE Office Websites (Extended Search)

SOFC Anode Interaction with Trace Coal Syngas Species SOFC Anode Interaction with Trace Coal Syngas Species U.S. Dept of Energy, National Energy Technology Laboratory, Morgantown, WV 26507 Gregory Hackett, Kirk Gerdes, Randall Gemmen Phone: (304)285-5279, Gregory.Hackett@NETL.DOE.GOV Utilization of coal as a fuel source for highly efficient integrated gasification fuel cell (IGFC) power generation facilities is technologically and environmentally attractive. IGFC plants are expected to offer the highest efficiency coal gasification processes, even when carbon capture and storage systems are included in the design. One element of IGFC research at the National Energy Technology Laboratory is the investigation of syngas cleanup processes for these integrated systems. Of particular interest are the effects of trace elements naturally contained in

271

Element Word Search  

NLE Websites -- All DOE Office Websites (Extended Search)

or, if you wish, you can download your very own copy of the Table of Elements. Download this Activity Lab Page Puzzle Puzzle Sample AnswersAnswer Key Answer Key Answer Key...

272

Compile-Time Compaction Of Traces For Memory Simulation  

E-Print Network (OSTI)

This thesis examines compile-time compaction of program execution traces. It presents a new method for compacting traces for memory simulation. Further, it describes a tool prototype that implements the method. Experiments with the tool prototype show that the new method reduces the time needed in simulating the operation of memories. Memory simulation is needed in the performance analysis and in the design of programs. In high performance applications, the data transfer between different layers of memory is one of the main bottlenecks. A program execution trace is a list of memory references. Using traces as simulation inputs is a flexible way of analyzing the memory perfor...

Vesa Hirvisalo; Vesa Hirvisalo; Dr. Tech Esko Nuutila

1998-01-01T23:59:59.000Z

273

Steam Tracing...New Technologies for the 21st Century  

E-Print Network (OSTI)

For decades, steam tracing has been an accepted practice in the heating of piping, vessels, and equipment. This paper presents recent product innovations such as "burn-safe" and "energy efficient" steam tracing products. For the many applications where steam tracing is applied for simple freeze protection, recently developed products which reduce the heat transfer rate and thus the energy consumption of steam tracers will be discussed. This paper will provide several steam tracing examples that will exhibit the use of experimental data, mathematical analysis, and FEA/CFD numerical simulation techniques.

Pitzer, R. K.; Barth, R. E.; Bonorden, C.

1999-05-01T23:59:59.000Z

274

Graphics: Atmospheric Trace Gases in Whole-Air Samples  

NLE Websites -- All DOE Office Websites (Extended Search)

Graphics graphics Graphics: Atmospheric Trace Gases in Whole-Air Samples The following links are for methane, nonmethane hydrocarbons, alkyl nitrates, and chlorinated carbon...

275

Jefferson Lab Science Series - The Origin of the Elements  

NLE Websites -- All DOE Office Websites (Extended Search)

You Already Know This Physics! You Already Know This Physics! Previous Video (You Already Know This Physics!) Science Series Video Archive Next Video (Guesstimating the Environment) Guesstimating the Environment The Origin of the Elements Dr. Edward Murphy - University of Virginia, Department of Astronomy November 13, 2012 The world around us is made of atoms. Did you ever wonder where these atoms came from? How was the gold in our jewelry, the carbon in our bodies, and the iron in our cars made? In this lecture, we will trace the origin of a gold atom from the Big Bang to the present day, and beyond. You will learn how the elements were forged in the nuclear furnaces inside stars, and how, when they die, these massive stars spread the elements into space. You will learn about the origin of the building blocks of matter in the Big Bang,

276

Autonomous microexplosives subsurface tracing system final report.  

SciTech Connect

The objective of the autonomous micro-explosive subsurface tracing system is to image the location and geometry of hydraulically induced fractures in subsurface petroleum reservoirs. This system is based on the insertion of a swarm of autonomous micro-explosive packages during the fracturing process, with subsequent triggering of the energetic material to create an array of micro-seismic sources that can be detected and analyzed using existing seismic receiver arrays and analysis software. The project included investigations of energetic mixtures, triggering systems, package size and shape, and seismic output. Given the current absence of any technology capable of such high resolution mapping of subsurface structures, this technology has the potential for major impact on petroleum industry, which spends approximately $1 billion dollar per year on hydraulic fracturing operations in the United States alone.

Engler, Bruce Phillip; Nogan, John; Melof, Brian Matthew; Uhl, James Eugene; Dulleck, George R., Jr.; Ingram, Brian V.; Grubelich, Mark Charles; Rivas, Raul R.; Cooper, Paul W.; Warpinski, Norman Raymond; Kravitz, Stanley H.

2004-04-01T23:59:59.000Z

277

Elemental sulfur recovery process  

DOE Patents (OSTI)

An improved catalytic reduction process for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides combined high activity and selectivity for the reduction of SO[sub 2] to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over certain catalyst formulations based on cerium oxide. The process is a single-stage, catalytic sulfur recovery process in conjunction with regenerators, such as those used in dry, regenerative flue gas desulfurization or other processes, involving direct reduction of the SO[sub 2] in the regenerator off gas stream to elemental sulfur in the presence of a catalyst. 4 figures.

Flytzani-Stephanopoulos, M.; Zhicheng Hu.

1993-09-07T23:59:59.000Z

278

Computing Heavy Elements  

E-Print Network (OSTI)

Reliable calculations of the structure of heavy elements are crucial to address fundamental science questions such as the origin of the elements in the universe. Applications relevant for energy production, medicine, or national security also rely on theoretical predictions of basic properties of atomic nuclei. Heavy elements are best described within the nuclear density functional theory (DFT) and its various extensions. While relatively mature, DFT has never been implemented in its full power, as it relies on a very large number (~ 10^9-10^12) of expensive calculations (~ day). The advent of leadership-class computers, as well as dedicated large-scale collaborative efforts such as the SciDAC 2 UNEDF project, have dramatically changed the field. This article gives an overview of the various computational challenges related to the nuclear DFT, as well as some of the recent achievements.

Schunck, N; Kortelainen, M; McDonnell, J; Mor, J; Nazarewicz, W; Pei, J; Sarich, J; Sheikh, J; Staszczak, A; Stoitsov, M; Wild, S M

2011-01-01T23:59:59.000Z

279

Nuclear fuel element  

DOE Patents (OSTI)

A nuclear fuel element and a method of manufacturing the element. The fuel element is comprised of a metal primary container and a fuel pellet which is located inside it and which is often fragmented. The primary container is subjected to elevated pressure and temperature to deform the container such that the container conforms to the fuel pellet, that is, such that the container is in substantial contact with the surface of the pellet. This conformance eliminates clearances which permit rubbing together of fuel pellet fragments and rubbing of fuel pellet fragments against the container, thus reducing the amount of dust inside the fuel container and the amount of dust which may escape in the event of container breach. Also, as a result of the inventive method, fuel pellet fragments tend to adhere to one another to form a coherent non-fragmented mass; this reduces the tendency of a fragment to pierce the container in the event of impact.

Zocher, Roy W. (Los Alamos, NM)

1991-01-01T23:59:59.000Z

280

Computing Heavy Elements  

E-Print Network (OSTI)

Reliable calculations of the structure of heavy elements are crucial to address fundamental science questions such as the origin of the elements in the universe. Applications relevant for energy production, medicine, or national security also rely on theoretical predictions of basic properties of atomic nuclei. Heavy elements are best described within the nuclear density functional theory (DFT) and its various extensions. While relatively mature, DFT has never been implemented in its full power, as it relies on a very large number (~ 10^9-10^12) of expensive calculations (~ day). The advent of leadership-class computers, as well as dedicated large-scale collaborative efforts such as the SciDAC 2 UNEDF project, have dramatically changed the field. This article gives an overview of the various computational challenges related to the nuclear DFT, as well as some of the recent achievements.

N. Schunck; A. Baran; M. Kortelainen; J. McDonnell; J. Mor; W. Nazarewicz; J. Pei; J. Sarich; J. Sheikh; A. Staszczak; M. Stoitsov; S. M. Wild

2011-07-25T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

CONSTRUCTION OF NUCLEAR FUEL ELEMENTS  

DOE Patents (OSTI)

>A rib arrangement and an end construction for nuclearfuel elements laid end to end in a coolant tube are described. The rib arrangement is such that each fuel element, when separated from other fuel elements, fits loosely in the coolant tube and so can easily be inserted or withdrawn from the tube. The end construction of the fuel elements is such that the fuel elements when assembled end to end are keyed against relative rotation, and the ribs of each fuel element cooperate with the ribs of the adjacent fuel elements to give the assembled fuel elements a tight fit with the coolant tube. (AEC)

Weems, S.J.

1963-09-24T23:59:59.000Z

282

FUEL ELEMENT CONSTRUCTION  

DOE Patents (OSTI)

A method of preventing diffusible and volatile fission products from diffusing through a fuel element container and contaminating reactor coolant is described. More specifically, relatively volatile and diffusible fission products either are adsorbed by or react with magnesium fluoride or difluoride to form stable, less volatile, less diffusible forms. The magnesium fluoride or difluoride is disposed anywhere inwardly from the outer surface of the fuel element container in order to be contacted by the fission products before they reach and contaminate the reactor coolant. (AEC)

Simnad, M.T.

1961-08-15T23:59:59.000Z

283

Compact, fast and robust grids for ray tracing  

Science Conference Proceedings (OSTI)

The focus of research in acceleration structures for ray tracing recently shifted from render time to time to image, the sum of build time and render time, and also the memory footprint of acceleration structures now receives more attention. In this ... Keywords: acceleration structure, grid, perfect hashing, ray tracing, row displacement compression

Ares Lagae; Philip Dutr

2008-06-01T23:59:59.000Z

284

BorderPatrol: isolating events for black-box tracing  

Science Conference Proceedings (OSTI)

Causal request traces are valuable to developers of large concurrent and distributed applications, yet difficult to obtain. Traces show how a request is processed, and can be analyzed by tools to detect performance or correctness errors and anomalous ... Keywords: black box systems, causal paths, distributed systems, performance analysis, performance debugging

Eric Koskinen; John Jannotti

2008-04-01T23:59:59.000Z

285

A Beginner's Guide to the Use of the TRACE Program  

Science Conference Proceedings (OSTI)

With deregulation increasing the number of bulk power transfers, more utility planners will be evaluating multi-area power transfer capability with programs such as EPRI's Transfer Capability Evaluation (TRACE). This manual will help TRACE users, particularly first-time users, develop their expertise with this sophisticated application.

1997-05-30T23:59:59.000Z

286

RPU: a programmable ray processing unit for realtime ray tracing  

Science Conference Proceedings (OSTI)

Recursive ray tracing is a simple yet powerful and general approach for accurately computing global light transport and rendering high quality images. While recent algorithmic improvements and optimized parallel software implementations have increased ... Keywords: hardware architecture, programmable shading, ray processing unit, ray tracing

Sven Woop; Jrg Schmittler; Philipp Slusallek

2005-07-01T23:59:59.000Z

287

Naive ray-tracing: A divide-and-conquer approach  

Science Conference Proceedings (OSTI)

We present an efficient ray-tracing algorithm which, for the first time, does not store any data structures when performing spatial subdivisions, and directly computes intersections inside the scene. This new algorithm is often faster than comparable ... Keywords: Ray tracing, divide-and-conquer, global illumination, rendering

Benjamin Mora

2011-10-01T23:59:59.000Z

288

Photovoltaic radiation detector element  

DOE Patents (OSTI)

A radiation detector element is formed of a body of semiconductor material, a coating on the body which forms a photovoltaic junction therewith, and a current collector consisting of narrow metallic strips, the aforesaid coating having an opening therein the edge of which closely approaches but is spaced from the current collector strips.

Agouridis, Dimitrios C. (Oak Ridge, TN)

1983-01-01T23:59:59.000Z

289

TABLE OF RADIOACTIVE ELEMENTS.  

SciTech Connect

For those chemical elements which have no stable nuclides with a terrestrial isotopic composition, the data on radioactive half-lives and relative atomic masses for the nuclides of interest and importance have been evaluated and the recommended values and uncertainties are listed.

HOLDEN,N.E.

2001-06-29T23:59:59.000Z

290

NEUTRONIC REACTOR FUEL ELEMENT  

DOE Patents (OSTI)

A nuclear fuel element comprising a plurality of nuclear fuel bearing strips is presented. The strips are folded along their longitudinal axes to an angle of about 60 deg and are secured at each end by ferrule to form an elongated assembly suitable for occupying a cylindrical coolant channel.

Gurinsky, D.H.; Powell, R.W.; Fox, M.

1959-11-24T23:59:59.000Z

291

Photovoltaic radiation detector element  

DOE Patents (OSTI)

A radiation detector element is formed of a body of semiconductor material, a coating on the body which forms a photovoltaic junction therewith, and a current collector consisting of narrow metallic strips, the aforesaid coating having an opening therein in the edge of which closely approaches but is spaced from the current collector strips.

Agouridis, D.C.

1980-12-17T23:59:59.000Z

292

Heating element support clip  

DOE Patents (OSTI)

An apparatus for supporting a heating element in a channel formed in a heater base is disclosed. A preferred embodiment includes a substantially U-shaped tantalum member. The U-shape is characterized by two substantially parallel portions of tantalum that each have an end connected to opposite ends of a base portion of tantalum. The parallel portions are each substantially perpendicular to the base portion and spaced apart a distance not larger than a width of the channel and not smaller than a width of a graphite heating element. The parallel portions each have a hole therein, and the centers of the holes define an axis that is substantially parallel to the base portion. An aluminum oxide ceramic retaining pin extends through the holes in the parallel portions and into a hole in a wall of the channel to retain the U-shaped member in the channel and to support the graphite heating element. The graphite heating element is confined by the parallel portions of tantalum, the base portion of tantalum, and the retaining pin. A tantalum tube surrounds the retaining pin between the parallel portions of tantalum.

Sawyer, William C. (Salida, CA)

1995-01-01T23:59:59.000Z

293

Abrupt climate change in the Atlantic Ocean during the last 20,000 years : insights from multi-element analysis of benthic and planktic foraminifera and coupled OA-GCM  

E-Print Network (OSTI)

Minor and trace element records of planktic and benthic foraminifera from Atlantic sediment cores, as well as output from a coupled OAGCM, were used to investigate the magnitude and distribution of the oceanic response to ...

Came, Rosemarie Evangeline

2005-01-01T23:59:59.000Z

294

Compound and Elemental Analysis At Walker-Lane Transitional Zone Region  

Open Energy Info (EERE)

Coolbaugh, Et Al., 2010) Coolbaugh, Et Al., 2010) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes "This second paper provides more detailed documentation on water and rock geochemistries and describes diagnostic major and trace element ratios and concentrations that can be used to distinguish tufa columns formed from thermal waters from those that formed from non-thermal waters." "In addition to providing a potentially diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring lithium deposits." References

295

Trace Assessment for BWR ATWS Analysis  

SciTech Connect

A TRACE/PARCS input model has been developed in order to be able to analyze anticipated transients without scram (ATWS) in a boiling water reactor. The model is based on one developed previously for the Browns Ferry reactor for doing loss-of-coolant accident analysis. This model was updated by adding the control systems needed for ATWS and a core model using PARCS. The control systems were based on models previously developed for the TRAC-B code. The PARCS model is based on information (e.g., exposure and moderator density (void) history distributions) obtained from General Electric Hitachi and cross sections for GE14 fuel obtained from an independent source. The model is able to calculate an ATWS, initiated by the closure of main steam isolation valves, with recirculation pump trip, water level control, injection of borated water from the standby liquid control system and actuation of the automatic depres-surization system. The model is not considered complete and recommendations are made on how it should be improved.

Cheng, L.Y.; Diamond, D.; Arantxa Cuadra, Gilad Raitses, Arnold Aronson

2010-04-22T23:59:59.000Z

296

Tracing the Impact of Bank Liquidity Shocks  

E-Print Network (OSTI)

While bank lending may fall in response to shocks to their liquidity, to what extent are such shocks transmitted to borrowing rms? Tracing such transmission mechanisms has proven di cult in the past due to a lack of micro data linking banks to borrowing rms and identication concerns. This paper uses dierential liquidity shocks arising from unanticipated nuclear tests in Pakistan in 1998, and a dataset linking over 18; 000 rms to all 145 banks to understand the full transmission mechanism. We isolate the causal impact of the bank lending channel by showing that for the same rm borrowing from two dierent banks, its loan from the bank experiencing a 1 % larger decline in liquidity drops by an additional 0.6%. The liquidity shock also leads to large declines in the probability of continued lending to old clients, and extending credit to new ones. However, we nd that rms dier in their ability to compensate the bank lending channel shock. Larger rms, while also facing a bank lending channel, are able to oset the adverse eect by borrowing more from more liquid banks. Smaller rms on the other hand are entiely unable to hedge out the bank lending channels. Consequently, a negative bank liquidity shock increases the

Asim Ijaz Khwaja; Atif Mian

2006-01-01T23:59:59.000Z

297

Using RFID for tracing cumulated resources and emissions in supply chain  

Science Conference Proceedings (OSTI)

The tracing of resources and emissions has been recognised increasingly important in supply chains. The developed traceability graph enables tracing of information associated with products and their parts. Tracing in a supply chain requires the three ...

Marko Junkkari; Antti Sirkka

2011-11-01T23:59:59.000Z

298

Element Crossword Puzzles  

NLE Websites -- All DOE Office Websites (Extended Search)

Crossword Puzzles Crossword Puzzles Welcome to It's Elemental - Element Crossword Puzzles! Use the clues provided to solve each crossword puzzle. To place letters on the puzzle, first select the clue you are answering from the pull-down menu and then enter your answer in the text box. Press the 'return' key on your keyboard when you are done. Correct letters will be green while incorrect letters will be red. Good luck and have fun! If you are reading this, your browser is NOT running JavaScript. JavaScript MUST be enabled for this section of our site to work. Once you have turned JavaScript on, reload this page and this warning will go away. Puzzle 1 - It's a Gas! Puzzle 2 - Easy Symbols Puzzle 3 - Strange Symbols Puzzle 4 - Known to the Ancients Puzzle 5 - The Alkali Metals

299

Multilayered nuclear fuel element  

DOE Patents (OSTI)

A nuclear fuel element is described which is suitable for high temperature applications comprised of a kernel of fissile material overlaid with concentric layers of impervious graphite, vitreous carbon, pyrolytic carbon and metal carbide. The kernel of fissile material is surrounded by a layer of impervious graphite. The layer of impervious graphite is then surrounded by a layer of vitreous carbon. Finally, an outer shell which includes alternating layers of pyrolytic carbon and metal carbide surrounds the layer of vitreous carbon.

Schweitzer, Donald G.; Sastre, Cesar

1996-12-01T23:59:59.000Z

300

The Chemical Elements  

Science Conference Proceedings (OSTI)

Table 1   Names and symbols for the elements (in alphabetical order)...Sodium (j) Na Strontium Sr Sulfur S Tantalum Ta Technetium Tc Tellurium Te Terbium Tb Thallium Tl Thorium Th Thulium Tm Tin (k) Sn Titanium Ti Tungsten (l) W Ununnilium Uun Unununium Uuu Uranium U Vanadium V Xenon Xe Ytterbium Yb Yttrium Y Zinc Zn Zirconium Zr (a) Symbol based on the Latin

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Nuclear fuel element  

DOE Patents (OSTI)

A nuclear fuel element wherein a tubular cladding of zirconium or a zirconium alloy has a fission gas plenum chamber which is held against collapse by the loops of a spacer in the form of a tube which has been deformed inwardly at three equally spaced, circumferential positions to provide three loops. A heat resistant disc of, say, graphite separates nuclear fuel pellets within the cladding from the plenum chamber. The spacer is of zirconium or a zirconium alloy.

Meadowcroft, Ronald Ross (Deep River, CA); Bain, Alastair Stewart (Deep River, CA)

1977-01-01T23:59:59.000Z

302

The transuranium elements: From neptunium and plutonium to element 112  

SciTech Connect

Beginning in the 1930`s, both chemists and physicists became interested in synthesizing new artificial elements. The first transuranium element, Np, was synthesized in 1940. Over the past six decades, 20 transuranium elements have been produced. A review of the synthesis is given. The procedure of naming the heavy elements is also discussed. It appears feasible to produce elements 113 and 114. With the Berkeley Gas-filled Separator, it should be possible to reach the superheavy elements in the region of the spherical Z=114 shell, but with fewer neutrons than the N=184 spherical shell. 57 refs, 6 figs.

Hoffman, D.C. [California Univ., Berkeley, CA (United States)]|[Lawrence Livermore National Lab., CA (United States)

1996-07-26T23:59:59.000Z

303

Algorithms and analysis for underwater vehicle plume tracing.  

SciTech Connect

The goal of this research was to develop and demonstrate cooperative 3-D plume tracing algorithms for miniature autonomous underwater vehicles. Applications for this technology include Lost Asset and Survivor Location Systems (L-SALS) and Ship-in-Port Patrol and Protection (SP3). This research was a joint effort that included Nekton Research, LLC, Sandia National Laboratories, and Texas A&M University. Nekton Research developed the miniature autonomous underwater vehicles while Sandia and Texas A&M developed the 3-D plume tracing algorithms. This report describes the plume tracing algorithm and presents test results from successful underwater testing with pseudo-plume sources.

Byrne, Raymond Harry; Savage, Elizabeth L. (Texas A& M University, College Station, TX); Hurtado, John Edward (Texas A& M University, College Station, TX); Eskridge, Steven E.

2003-07-01T23:59:59.000Z

304

The Algorithmic Beauty of Traces Using L-systems to Hilight Patterns ...  

E-Print Network (OSTI)

Nov 19, 1997 ... Characteristics of truth tables Visualization of truth tables L-systems Visualization and observations on traces A strategy for the 3-trace case.

305

Halocarbon and Other Atmospheric Trace Species (HATS) | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Halocarbon and Other Atmospheric Trace Species (HATS) Halocarbon and Other Atmospheric Trace Species (HATS) Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Halocarbon and Other Atmospheric Trace Species (HATS) Dataset Summary Description The general mission of the Halocarbons and other Atmospheric Trace Species group is to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds. HATS utilizes numerous types of platforms, including ground-based stations, towers, ocean vessels, aircraft, and balloons, to accomplish its mission. For a detailed mission statement, consult our FAQ. Tags {"nitrous oxide","sulfur hexaflouride",CFC-11,CFC-12,CFC-113,CCl4,CH3CCl3,CH3Cl,halon-1211,HCFC-22,HCFC-142b,halocarbons,chromatograph,aircraft,balloons,vessels,ships,towers,"natural resources",environment,air,"GHG "}

306

Interannual Variability of Trace Gases in the Subtropical Winter Stratosphere  

Science Conference Proceedings (OSTI)

Measurements of water vapor and methane from the Halogen Occultation Experiment instrument on board the Upper Atmosphere Research Satellite are used to study the interannual variability of trace gas distributions in the atmosphere. Particular ...

L. J. Gray; J. M. Russell Jr.

1999-04-01T23:59:59.000Z

307

Traces generation to simulate large-scale distributed applications  

Science Conference Proceedings (OSTI)

In order to study the performance of scheduling algorithms, simulators of parallel and distributed applications need accurate models of the application's behavior during execution. For this purpose, traces of low-level events collected during the actual ...

Olivier Dalle; Emilio P. Mancini

2011-12-01T23:59:59.000Z

308

Trace metal particulates in coal-fired power plant emissions.  

E-Print Network (OSTI)

??Since coal-fired power plants produce approximately 50% of U.S. energy, the toxic and environmental damaging effects of this energy source are important. Trace metals are (more)

Marett, Lanette Simone

2007-01-01T23:59:59.000Z

309

Heterogeneity and dynamicity of clouds at scale: Google trace analysis  

Science Conference Proceedings (OSTI)

To better understand the challenges in developing effective cloud-based resource schedulers, we analyze the first publicly available trace data from a sizable multi-purpose cluster. The most notable workload characteristic is heterogeneity: in resource ...

Charles Reiss; Alexey Tumanov; Gregory R. Ganger; Randy H. Katz; Michael A. Kozuch

2012-10-01T23:59:59.000Z

310

Laboratory measurements and modeling of trace atmospheric species  

E-Print Network (OSTI)

Trace species play a major role in many physical and chemical processes in the atmosphere. Improving our understanding of the impact of each species requires a combination of laboratory exper- imentation, field measurements, ...

Sheehy, Philip M. (Philip Michael)

2005-01-01T23:59:59.000Z

311

High quality rendering using ray tracing and photon mapping  

Science Conference Proceedings (OSTI)

Ray tracing and photon mapping provide a practical way of efficiently simulating global illumination including interreflections, caustics, color bleeding, participating media and subsurface scattering in scenes with complicated geometry and advanced ...

Henrik Wann Jensen; Per Christensen

2007-08-01T23:59:59.000Z

312

A strategy for the 3-trace case - CECM  

E-Print Network (OSTI)

Nov 19, 1997 ... Figure 10 shows a 3-trace on 4-atom truth table and its correspondence as an L- system. Again transitions form 1's to 0's are highlighted. Similar...

313

Agent-based chemical plume tracing using fluid dynamics  

Science Conference Proceedings (OSTI)

This paper presents a rigorous evaluation of a novel, distributed chemical plume tracing algorithm. The algorithm is a combination of the best aspects of the two most popular predecessors for this task. Furthermore, it is based on solid, formal principles ...

Dimitri Zarzhitsky; Diana Spears; David Thayer; William Spears

2004-04-01T23:59:59.000Z

314

FUEL ELEMENT CONSTRUCTION  

DOE Patents (OSTI)

Fuel elements having a solid core of fissionable material encased in a cladding material are described. A conversion material is provided within the cladding to react with the fission products to form stable, relatively non- volatile compounds thereby minimizing the migration of the fission products into the coolant. The conversion material is preferably a metallic fluoride, such as lead difluoride, and may be in the form of a coating on the fuel core or interior of the cladding, or dispersed within the fuel core. (AEC)

Zumwalt, L.R.

1961-08-01T23:59:59.000Z

315

Technique for identifying, tracing, or tracking objects in image data  

SciTech Connect

A technique for computer vision uses a polygon contour to trace an object. The technique includes rendering a polygon contour superimposed over a first frame of image data. The polygon contour is iteratively refined to more accurately trace the object within the first frame after each iteration. The refinement includes computing image energies along lengths of contour lines of the polygon contour and adjusting positions of the contour lines based at least in part on the image energies.

Anderson, Robert J. (Albuquerque, NM); Rothganger, Fredrick (Albuquerque, NM)

2012-08-28T23:59:59.000Z

316

International team discovers element 117  

NLE Websites -- All DOE Office Websites (Extended Search)

LLNL Click for animated video The experiment produced six atoms of element 117. For each atom, the team observed the alpha decay from element 117 to 115 to 113 and so on until the...

317

3800 Green Series Cost Elements  

Energy.gov (U.S. Department of Energy (DOE))

Stoller - Legacy ManagementSustainable Acquisition (formerly EPP) Program 3800 Series Cost Elements01/30/2012 (Rev. 4)

318

XCCDF Language Schema Element Dictionary  

Science Conference Proceedings (OSTI)

- Extensible Configuration Checklist Description Format - Element Dictionary. Schema: XCCDF Language; Version: 1.2; Release Date: 2011-07-26. ...

2012-10-26T23:59:59.000Z

319

The CEBAF Element Database  

Science Conference Proceedings (OSTI)

With the inauguration of the CEBAF Element Database (CED) in Fall 2010, Jefferson Lab computer scientists have taken a step toward the eventual goal of a model-driven accelerator. Once fully populated, the database will be the primary repository of information used for everything from generating lattice decks to booting control computers to building controls screens. A requirement influencing the CED design is that it provide access to not only present, but also future and past configurations of the accelerator. To accomplish this, an introspective database schema was designed that allows new elements, types, and properties to be defined on-the-fly with no changes to table structure. Used in conjunction with Oracle Workspace Manager, it allows users to query data from any time in the database history with the same tools used to query the present configuration. Users can also check-out workspaces to use as staging areas for upcoming machine configurations. All Access to the CED is through a well-documented Application Programming Interface (API) that is translated automatically from original C++ source code into native libraries for scripting languages such as perl, php, and TCL making access to the CED easy and ubiquitous.

Theodore Larrieu, Christopher Slominski, Michele Joyce

2011-03-01T23:59:59.000Z

320

Multi-element microelectropolishing method  

DOE Patents (OSTI)

A method is provided for microelectropolishing a transmission electron microscopy nonhomogeneous multi-element compound foil. The foil is electrolyzed at different polishing rates for different elements by rapidly cycling between different current densities. During a first portion of each cycle at a first voltage a first element electrolyzes at a higher current density than a second element such that the material of the first element leaves the anode foil at a faster rate than the second element and creates a solid surface film, and such that the solid surface film is removed at a faster rate than the first element leaves the anode foil. During a second portion of each cycle at a second voltage the second element electrolyzes at a higher current density than the first element, and the material of the second element leaves the anode foil at a faster rate than the first element and creates a solid surface film, and the solid surface film is removed at a slower rate than the second element leaves the foil. The solid surface film is built up during the second portion of the cycle, and removed during the first portion of the cycle. 10 figs.

Lee, P.J.

1994-10-11T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Multi-element microelectropolishing method  

DOE Patents (OSTI)

A method is provided for microelectropolishing a transmission electron microscopy nonhomogeneous multi-element compound foil. The foil is electrolyzed at different polishing rates for different elements by rapidly cycling between different current densities. During a first portion of each cycle at a first voltage a first element electrolyzes at a higher current density than a second element such that the material of the first element leaves the anode foil at a faster rate than the second element and creates a solid surface film, and such that the solid surface film is removed at a faster rate than the first element leaves the anode foil. During a second portion of each cycle at a second voltage the second element electrolyzes at a higher current density than the first element, and the material of the second element leaves the anode foil at a faster rate than the first element and creates a solid surface film, and the solid surface film is removed at a slower rate than the second element leaves the foil. The solid surface film is built up during the second portion of the cycle, and removed during the first portion of the cycle.

Lee, Peter J. (Middleton, WI)

1994-01-01T23:59:59.000Z

322

REACTOR FUEL ELEMENTS TESTING CONTAINER  

DOE Patents (OSTI)

This patent shows a method for detecting leaks in jacketed fuel elements. The element is placed in a sealed tank within a nuclear reactor, and, while the reactor operates, the element is sparged with gas. The gas is then led outside the reactor and monitored for radioactive Xe or Kr. (AEC)

Whitham, G.K.; Smith, R.R.

1963-01-15T23:59:59.000Z

323

Isotopic and Elemental Changes in Winter Snow Accumulation on Glaciers in the Southern Alps of New Zealand  

Science Conference Proceedings (OSTI)

The authors present stable water isotope and trace element data for fresh winter snow from two temperate maritime glaciers located on opposite sides of the New Zealand Southern Alps. The isotopes ?18O and ?D were more depleted at the eastern ...

Heather Purdie; Nancy Bertler; Andrew Mackintosh; Joel Baker; Rachael Rhodes

2010-09-01T23:59:59.000Z

324

Nuclear fuel element  

DOE Patents (OSTI)

A nuclear fuel element for use in the core of a nuclear reactor is disclosed and has a composite cladding having a substrate and a metal barrier metallurgically bonded on the inside surface of the substrate so that the metal barrier forms a shield between the substrate and the nuclear fuel material held within the cladding. The metal barrier forms about 1 to about 30 percent of the thickness of the cladding and is comprised of a low neutron absorption metal of substantially pure zirconium. The metal barrier serves as a preferential reaction site for gaseous impurities and fission products and protects the substrate from contact and reaction with such impurities and fission products. The substrate of the composite cladding is selected from conventional cladding materials and preferably is a zirconium alloy. Methods of manufacturing the composite cladding are also disclosed.

Armijo, Joseph S. (Saratoga, CA); Coffin, Jr., Louis F. (Schenectady, NY)

1983-01-01T23:59:59.000Z

325

Nuclear fuel element  

DOE Patents (OSTI)

A nuclear fuel element for use in the core of a nuclear reactor is disclosed and has an improved composite cladding comprised of a moderate purity metal barrier of zirconium metallurgically bonded on the inside surface of a zirconium alloy tube. The metal barrier forms a shield between the alloy tube and a core of nuclear fuel material enclosed in the composite cladding. There is a gap between the cladding and the core. The metal barrier forms about 1 to about 30 percent of the thickness of the composite cladding and has low neutron absorption characteristics. The metal barrier serves as a preferential reaction site for gaseous impurities and fission products and protects the alloy tube from contact and reaction with such impurities and fission products. Methods of manufacturing the composite cladding are also disclosed.

Armijo, Joseph S. (Saratoga, CA); Coffin, Jr., Louis F. (Schenectady, NY)

1980-04-29T23:59:59.000Z

326

Photoconductive circuit element reflectometer  

DOE Patents (OSTI)

A photoconductive reflectometer for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short first laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test. Second PCEs are connected along the transmission line to sample the signals on the transmission line when excited into conductance by short second laser light pulses, spaced apart in time a variable period from the first laser light pulses. Electronic filters connected to each of the second PCEs act as low-pass filters and remove parasitic interference from the sampled signals and output the sampled signals in the form of slowed-motion images of the signals on the transmission line.

Rauscher, Christen (Alexandria, VA)

1990-01-01T23:59:59.000Z

327

Definition: Element | Open Energy Information  

Open Energy Info (EERE)

Element Element Jump to: navigation, search Dictionary.png Element Any electrical device with terminals that may be connected to other electrical devices such as a generator, transformer, circuit breaker, bus section, or transmission line. An element may be comprised of one or more components.[1] View on Wikipedia Wikipedia Definition Electrical elements are conceptual abstractions representing idealized electrical components, such as resistors, capacitors, and inductors, used in the analysis of electrical networks. Any electrical network can be analysed as multiple, interconnected electrical elements in a schematic diagram or circuit diagram, each of which affects the voltage in the network or current through the network. These ideal electrical elements represent real, physical electrical or electronic components but

328

Super Heavy Element Discovery | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Super Heavy Element Discovery SHARE Super Heavy Element Discovery The location of the Transactinides (super-heavy elements) shown on the Periodic Table. ORNL is internationally...

329

Thermodynamic analysis of interactions between Ni-based solid oxide fuel cells (SOFC) anodes and trace species in a survey of coal syngas  

Science Conference Proceedings (OSTI)

A thermodynamic analysis was conducted to characterize the effects of trace contaminants in syngas derived from coal gasification on solid oxide fuel cell (SOFC) anode material. The effluents from 15 different gasification facilities were considered to assess the impact of fuel composition on anode susceptibility to contamination. For each syngas case, the study considers the magnitude of contaminant exposure resulting from operation of a warm gas cleanup unit at two different temperatures and operation of a nickel-based SOFC at three different temperatures. Contaminant elements arsenic (As), phosphorous (P), and antimony (Sb) are predicted to be present in warm gas cleanup effluent and will interact with the nickel (Ni) components of a SOFC anode. Phosphorous is the trace element found in the largest concentration of the three contaminants and is potentially the most detrimental. Poisoning was found to depend on the composition of the syngas as well as system operating conditions. Results for all trace elements tended to show invariance with cleanup operating temperature, but results were sensitive to syngas bulk composition. Synthesis gas with high steam content tended to resist poisoning.

Andrew Martinez; Kirk Gerdes; Randall Gemmen; James Postona

2010-03-20T23:59:59.000Z

330

NUCLEAR REACTOR FUEL ELEMENT ASSEMBLY  

DOE Patents (OSTI)

A method of fabricating nuclear reactor fuel element assemblies having a plurality of longitudinally extending flat fuel elements in spaced parallel relation to each other to form channels is presented. One side of a flat side plate is held contiguous to the ends of the elements and a welding means is passed along the other side of the platertransverse to the direction of the longitudinal extension of the elements. The setting and speed of travel of the welding means is set to cause penetration of the side plate with welds at bridge the gap in each channel between adjacent fuel elements with a weld-through bubble of predetermined size. The fabrication of a high strength, dependable fuel element is provided, and the reduction of distortion and high production costs are facilitated by this method. (AEC)

Stengel, F.G.

1963-12-24T23:59:59.000Z

331

Building Energy Software Tools Directory: TRACE Load 700  

NLE Websites -- All DOE Office Websites (Extended Search)

Load 700 Load 700 TRACE Load 700 logo. Use TRACE Load 700 software - the building and load design modules of TRACE 700, Trane Air Conditioning Economics - to evaluate the effect of building orientation, size, shape, and mass based on hourly weather data and the resulting heat-transfer characteristics of air and moisture. To assure calculation integrity, the program uses algorithms recommended by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). Choose from eight different ASHRAE cooling and heating methodologies, including the Exact Transfer Function. The program encourages "what if" analyses, allowing the user to enter construction details in any order and then easily change the resulting building model as the design progresses. Multiple project views and "drag-and-drop"

332

CSIRO GASLAB Network: Individual Flask Measurements of Atmospheric Trace  

NLE Websites -- All DOE Office Websites (Extended Search)

GASLAB Network GASLAB Network CSIRO GASLAB Network: Individual Flask Measurements of Atmospheric Trace Gases (April 2003) data Data Investigators L.P. Steele, P.R. Krummel, and R.L. Langenfelds Commonwealth Scientific and Industrial Research Organisation (CSIRO) DOI 10.3334/CDIAC/atg.db1021 Data are available for four atmospheric trace gases at nine stationary sites and one moving platform (aircraft over Cape Grim, Tasmania, and Bass Strait, between the Australian continent and Tasmania). The trace gases are carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), and hydrogen (H2). Measurements of δ13C from CO2 are also included in this database. The nine stationary sites are, from north to south: Alert, Canada; Shetland Islands, Scotland; Estevan Point, Canada; Mauna Loa, Hawaii; Cape Ferguson,

333

AN OVERVIEW OF TOOL FOR RESPONSE ACTION COST ESTIMATING (TRACE)  

Science Conference Proceedings (OSTI)

Tools and techniques that provide improved performance and reduced costs are important to government programs, particularly in current times. An opportunity for improvement was identified for preparation of cost estimates used to support the evaluation of response action alternatives. As a result, CH2M HILL Plateau Remediation Company has developed Tool for Response Action Cost Estimating (TRACE). TRACE is a multi-page Microsoft Excel{reg_sign} workbook developed to introduce efficiencies into the timely and consistent production of cost estimates for response action alternatives. This tool combines costs derived from extensive site-specific runs of commercially available remediation cost models with site-specific and estimator-researched and derived costs, providing the best estimating sources available. TRACE also provides for common quantity and key parameter links across multiple alternatives, maximizing ease of updating estimates and performing sensitivity analyses, and ensuring consistency.

FERRIES SR; KLINK KL; OSTAPKOWICZ B

2012-01-30T23:59:59.000Z

334

Natchez Trace Elec Power Assn | Open Energy Information  

Open Energy Info (EERE)

Natchez Trace Elec Power Assn Natchez Trace Elec Power Assn Jump to: navigation, search Name Natchez Trace Elec Power Assn Place Mississippi Utility Id 13227 Utility Location Yes Ownership C NERC Location SERC NERC SERC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png General Service (1001 kW-5000kW) Industrial General Service (50 kW and Under) Commercial General Service (51 kW-1000 kW) Commercial Outdoor Lighting HPS 100 W Lighting Outdoor Lighting HPS 100 W Dedicated Pole Lighting Outdoor Lighting HPS 100 W Dedicated Pole & Transformer Lighting Outdoor Lighting HPS 100 W Dedicated Transformer Lighting

335

FUEL ELEMENT FOR NUCLEAR REACTORS  

DOE Patents (OSTI)

A fuel element particularly adapted for use in nuclear reactors of high power density is offered. It has fissionable fuel pellet segments mounted in a tubular housing and defining a central passage in the fuel element. A burnable poison element extends through the central passage, which is designed to contain more poison material at the median portion than at the end portions thereby providing a more uniform hurnup and longer reactivity life.

Bassett, C.H.

1961-05-16T23:59:59.000Z

336

Understanding reservoir mechanisms using phase and component streamline tracing  

E-Print Network (OSTI)

Conventionally streamlines are traced using total flux across the grid cell faces. The visualization of total flux streamlines shows the movement of flood, injector-producer relationship, swept area and movement of tracer. But they fail to capture some important signatures of reservoir dynamics, such as dominant phase in flow, appearance and disappearance of phases (e.g. gas), and flow of components like CO2. In the work being presented, we demonstrate the benefits of visualizing phase and component streamlines which are traced using phase and component fluxes respectively. Although the phase and component streamlines are not appropriate for simulation, as they might be discontinuous, they definitely have a lot of useful information about the reservoir processes and recovery mechanisms. In this research, phase and component streamline tracing has been successfully implemented in three-phase and compositional simulation and the additional information obtained using these streamlines have been explored. The power and utility of the phase and component streamlines have been demonstrated using synthetic examples and two field cases. The new formulation of streamline tracing provides additional information about the reservoir drive mechanisms. The phase streamlines capture the dominant phase in flow in different parts of the reservoir and the area swept corresponding to different phases can be identified. Based on these streamlines the appearance and disappearance of phases can be identified. Also these streamlines can be used for optimizing the field recovery processes like water injection and location of infill wells. Using component streamlines the movement of components like CO2 can be traced, so they can be used for optimizing tertiary recovery mechanisms and tracking of tracers. They can also be used to trace CO2 in CO2 sequestration project where the CO2 injection is for long term storage in aquifers or reservoirs. They have also other potential uses towards study of reservoir processes and behavior such as drainage area mapping for different phases, phase rate allocations to reservoir layers, etc.

Kumar, Sarwesh

2008-08-01T23:59:59.000Z

337

Method for Detecting an Element  

Using gamma ray spectrum analysis, this patented invention detects a desired element from a very small sample and by compares it to a small sample of ...

338

Dynamic ray tracing and traveltime corrections for global seismic tomography  

Science Conference Proceedings (OSTI)

We present a dynamic ray tracing program for a spherically symmetric Earth that may be used to compute Frechet kernels for traveltime and amplitude anomalies at finite frequency. The program works for arbitrarily defined phases and background models. The numerical precisions of kinematic and dynamic ray tracing are optimized to produce traveltime errors under 0.1 s, which is well below the data uncertainty in global seismology. This tolerance level is obtained for an integration step size of about 20 km for the most common seismic phases. We also give software to compute ellipticity, crustal and topographic corrections and attenuation.

Tian Yue [Department of Geosciences, Guyot Hall, Princeton University, NJ 08544 (United States)], E-mail: ytian@princeton.edu; Hung, S.-H. [Department of Geosciences, National Taiwan University, Taipei 106, Taiwan (China); Nolet, Guust [Department of Geosciences, Guyot Hall, Princeton University, NJ 08544 (United States); Montelli, Raffaella [ExxonMobil Upstream Research Company, P.O. Box 22189, GW03-940A, Houston, TX 77252-2189 (United States); Dahlen, F.A. [Department of Geosciences, Guyot Hall, Princeton University, NJ 08544 (United States)

2007-09-10T23:59:59.000Z

339

HappyJIT: a tracing JIT compiler for PHP  

Science Conference Proceedings (OSTI)

Current websites are a combination of server-generated dynamic content with client-side interactive programs. Dynamically - typed languages have gained a lot of ground in both of these domains. The growth of Web 2.0 has introduced a myriad of websites ... Keywords: dynamically typed languages, interpreter, just-in-time compilation, php, pypy, rpython, tracing

Andrei Homescu; Alex ?uhan

2012-03-01T23:59:59.000Z

340

Exploring the use of ray tracing for future games  

Science Conference Proceedings (OSTI)

Rasterization hardware and computer games have always been tightly connected: The hardware implementation of rasterization has made complex interactive 3D games possible while requirements for future games drive the development of increasingly parallel ... Keywords: dynamic scenes, games development, global illumination, graphics hardware, realtime ray tracing, simulation

Heiko Friedrich; Johannes Gnther; Andreas Dietrich; Michael Scherbaum; Hans-Peter Seidel; Philipp Slusallek

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Steal Tree: low-overhead tracing of work stealing schedulers  

Science Conference Proceedings (OSTI)

Work stealing is a popular approach to scheduling task-parallel programs. The flexibility inherent in work stealing when dealing with load imbalance results in seemingly irregular computation structures, complicating the study of its runtime behavior. ... Keywords: async-finish parallelism, tracing, work-stealing schedulers

Jonathan Lifflander; Sriram Krishnamoorthy; Laxmikant V. Kale

2013-06-01T23:59:59.000Z

342

Network traces of virtual worlds: measurements and applications  

Science Conference Proceedings (OSTI)

Although network traces of virtual worlds are valuable to ISPs (Internet service providers), virtual world software developers, and research communities, they do not exist in the public domain. In this work, we implement a complete testbed to efficiently ... Keywords: traffic measurement, traffic modeling, virtual world

Yichuan Wang; Cheng-Hsin Hsu; Jatinder Pal Singh; Xin Liu

2011-02-01T23:59:59.000Z

343

Dartmouth Trace Element Analysis Core: Lab methods All prices are based on analysis of up to 10 elements of interest to the investigator. More analytes can  

E-Print Network (OSTI)

gas) mode for maximum sensitivity. Pb data is the sum of Pb206,207 and 208. Selenium is analysed in reaction mode with H2 as the reactive gas at a flow rate sufficient to minimize Ar dimer background @ m/z78) bottles or metal free centrifuge tubes (e.g VWR 89049 series). A minimum of 10mls of sample should

Lotko, William

344

Experimental and finite element analysis of high pressure packer elements  

E-Print Network (OSTI)

Packer elements are traditionally rubber seals that can operate under specified downhole conditions and provide a seal for either a short-term, retrievable, or a long-term, permanent, completion. In this case a retrievable ...

Berger, Stephanie, 1981-

2004-01-01T23:59:59.000Z

345

In Situ Measurements of Long-Lived Trace Gases in the Lower Stratosphere by Gas Chromatography  

Science Conference Proceedings (OSTI)

Detailed information on the four-channel Airborne Chromatograph for Atmospheric Trace Species (ACATS-IV), used to measure long-lived atmospheric trace gases, is presented. Since ACATS-IV was last described in the literature, the temporal ...

P. A. Romashkin; D. F. Hurst; J. W. Elkins; G. S. Dutton; D. W. Fahey; R. E. Dunn; F. L. Moore; R. C. Myers; B. D. Hall

2001-07-01T23:59:59.000Z

346

A validation of a ray-tracing tool used to generate bi-directional...  

NLE Websites -- All DOE Office Websites (Extended Search)

A validation of a ray-tracing tool used to generate bi-directional scattering distribution functions for complex fenestration systems Title A validation of a ray-tracing tool used...

347

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

b In the 252 steam CS-74 a greater distribution of mass fromand N^-steam runs have identical mass distribution patternsC during N^-steam and Table 6. Mass distribution patterns

Fox, J. P.

2011-01-01T23:59:59.000Z

348

Prevention of trace and major element leaching from coal combustion products by hydrothermally-treated coal ash  

Science Conference Proceedings (OSTI)

The most important structural components of coal ash obtained by coal combustion in 'Nikola Tesla A' power plant located near Belgrade (Serbia) are amorphous alumosilicate, alpha-quartz, and mullite. The phase composition of coal ash can be altered to obtain zeolite type NaA that crystallizes in a narrow crystallization field (SiO{sub 2}/Al{sub 2}O{sub 3}; Na{sub 2}O/SiO{sub 2}; H{sub 2}O/Na{sub 2}O ratios). Basic properties (crystallization degree, chemical composition, the energy of activation) of obtained zeolites were established. Coal ash extracts treated with obtained ion-exchange material showed that zeolites obtained from coal ash were able to reduce the amounts of iron, chromium, nickel, zinc, copper, lead, and manganese in ash extracts, thus proving its potential in preventing pollution from dump effluent waters.

Adnadjevic, B.; Popovic, A.; Mikasinovic, B. [University of Belgrade, Belgrade (Serbia). Dept. of Chemistry

2009-07-01T23:59:59.000Z

349

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

v. 18, p. Hadeishi, T. and McLaughlin, R. D. , 1975, IsotopeAugust. Hadeishi, T. and McLaughlin, R. D. , 1978, ZeemanJ. J. , Mason, K. K. , McLaughlin, R, E. , Bartke, T. C. ,

Fox, J. P.

2011-01-01T23:59:59.000Z

350

Trace element and technological analyses of obsidian artifacts from the Northern ridge of Lake Atitlan, Department of Solola, Guatemala  

E-Print Network (OSTI)

One hundred obsidian artifacts from the San Jose Chacaya site area located along the northern ridge of Lake Atitlan, Guatemala were subjected to Neutron Activation Analysis (NAA) to determine their provenience. In addition, sixty-six samples from the obsidian sources of Rio Pixcaya, El Chayal, and Ixtepeque were analyzed to provide source groups for the artifacts. NAA results indicated that seventy-five artifacts compare with Rio Pixcayi, eight compare with El Chayal, and thirteen are unassigned. None of the artifacts shared similar chemical signatures with Ixtepeque. In addition to the NAA analyses, the geology and geography of the Lake Atitlan region were examined to establish the absence of exploitable lithic sources in the area, as well as to define the site formation processes affecting the archaeological remains of San Jose Chacaya. This lack of lithic materials supports the importation of obsidian to the San Jose Chacaya area by way of regional and interregional trade routes. Several trade routes spanning from the Preclassic to the Postclassic were presented and compared to the location of San Jose Chacaya and its obsidian artifact assemblage. It was hypothesized the inhabitants of San Jose Chacaya relied upon these trade routes for their obsidian supply and may have been under the influence of emerging polities nearby. In conclusion, the archaeological evidence and the NAA analyses indicate the obsidian collection from San Jose Chacaya site area is Middle to Late Preclassic (500-100 BC) in age.

Woodward, Michelle Ruth

1996-01-01T23:59:59.000Z

351

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

or by refin- ing and using shale Oil Mass balances and oil.shale retorting produces shale oil, mobility factors wereand retort operating shale, shale oil, retorting (LETC) con-

Fox, J. P.

2011-01-01T23:59:59.000Z

352

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

V. , 1979, Analysis of oil shale of products and effluents:In- Situ Retorting of Oil Shale in a Controlled- Stateactivation: Archaeometry, oil-shale analysis v. 11, p.

Fox, J. P.

2011-01-01T23:59:59.000Z

353

doi:10.1016/j.gca.2004.10.024 Trace element cycling in a subterranean estuary  

E-Print Network (OSTI)

, and SSRL. Three "third-generation" synchrotron sources were built in the 1990s and are now available

354

PARTITIONING OF MAJOR, MINOR, AND TRACE ELEMENTS DURING SIMULATED IN SITU OIL SHALE RETORTING IN A CONTROLLED-STATE RETORT  

E-Print Network (OSTI)

V. , 1979, Analysis of oil shale of products and effluents:In- Situ Retorting of Oil Shale in a Controlled- Stateelement matrices by x-ray for shale retort: Quarterly of the

Fox, J. P.

2011-01-01T23:59:59.000Z

355

The role of trace gas flux networks in biogeosciences  

SciTech Connect

Vast networks of meteorological sensors ring the globe, providing continuous measurements of an array of atmospheric state variables such as temperature, humidity, rainfall, and the concentration of carbon dioxide [New etal., 1999; Tans etal., 1996]. These measurements provide input to weather and climate models and are key to detecting trends in climate, greenhouse gases, and air pollution. Yet to understand how and why these atmospheric state variables vary in time and space, biogeoscientists need to know where, when, and at what rates important gases are flowing between the land and the atmosphere. Tracking trace gas fluxes provides information on plant or microbial metabolism and climate-ecosystem interactions. The existence of trace gas flux networks is a relatively new phenomenon, dating back to research in 1984. The first gas flux measurement networks were regional in scope and were designed to track pollutant gases such as sulfur dioxide, ozone, nitric acid, and nitrogen dioxide. Atmospheric observations and model simulations were used to infer the depositional rates of these hazardous chemicals [Fowler etal., 2009; Meyers etal., 1991]. In the late 1990s, two additional trace gas flux measurement networks emerged. One, the United States Trace Gas Network (TRAGNET), was a short-lived effort that measured trace gas emissions from the soil and plants with chambers distributed throughout the country [Ojima etal., 2000]. The other, FLUXNET, was an international endeavor that brought many regional networks together to measure the fluxes of carbon dioxide, water vapor, and sensible heat exchange with the eddy covariance technique [Baldocchi etal., 2001]. FLUXNET, which remains active today, currently includes more than 400 tower sites, dispersed across most of the world's climatic zones and biomes, with sites in North and South America, Europe, Asia, Africa, and Australia. More recently, several specialized networks have emerged, including networks dedicated to urban areas (Urban Fluxnet), nitrogen compounds in Europe (NitroEurope), and methane (MethaneNet). Technical Aspects of Flux Networks Eddy covariance flux measurements are the preferred method by which biogeoscientists measure trace gas exchange between ecosystems and the atmosphere [Baldocchi, 2003].

Baldocch, Dennis [Department of Environmental Science, Policy and Management, University of California, Berkeley,; Reichstein, Markus [Max Planck Institute for Biogeochemistry; Papale, D. [University of Tuscia; KOTEEN, LAURIE [University of California, Berkeley; VARGAS, RODRIGO [Ensenada Center for Scientific Research and Higher Education (CICESE); Agarwal, D.A [Lawrence Berkeley National Laboratory (LBNL); Cook, Robert B [ORNL

2012-01-01T23:59:59.000Z

356

FUEL ELEMENT FOR NUCLEAR REACTORS  

DOE Patents (OSTI)

A method is described whereby fuel tubes or pins are cut, loaded with fuel pellets and a heat transfer medium, sealed at each end with slotted fittings, and assembled into a rectangular tube bundle to form a fuel element. The tubes comprising the fuel element are laterally connected between their ends by clips and tabs to form a linear group of spaced parallel tubes, which receive their vertical support by resting on a grid. The advantages of this method are that it permits elimination of structural material (e.g., fuel-element cans) within the reactor core, and removal of at least one fuel pin from an element and replacement thereof so that a burnable poison may be utilized during the core lifetime. (AEC)

Dickson, J.J.

1963-09-24T23:59:59.000Z

357

Elemental ABAREX -- a user's manual.  

SciTech Connect

ELEMENTAL ABAREX is an extended version of the spherical optical-statistical model code ABAREX, designed for the interpretation of neutron interactions with elemental targets consisting of up to ten isotopes. The contributions from each of the isotopes of the element are explicitly dealt with, and combined for comparison with the elemental observables. Calculations and statistical fitting of experimental data are considered. The code is written in FORTRAN-77 and arranged for use on the IBM-compatible personal computer (PC), but it should operate effectively on a number of other systems, particularly VAX/VMS and IBM work stations. Effort is taken to make the code user friendly. With this document a reasonably skilled individual should become fluent with the use of the code in a brief period of time.

Smith, A.B.

1999-05-26T23:59:59.000Z

358

Climate Modeling with Spectral Elements  

Science Conference Proceedings (OSTI)

As an effort toward improving climate modelcomponent performance and accuracy, an atmospheric-component climate model has been developed, entitled the Spectral Element Atmospheric Climate Model and denoted as CAM_SEM. CAM_SEM includes a unique ...

Ferdinand Baer; Houjun Wang; Joseph J. Tribbia; Aim Fournier

2006-12-01T23:59:59.000Z

359

Unifluxor: a permanent memory element  

Science Conference Proceedings (OSTI)

The Unifluxor is a new binary permanent memory element which appears to have the advantages of high-speed operation, easy fabrication, and low cost. Unlike cores, twistors, capacitors, and other commonly used memory devices, the Unifluxor does not depend ...

A. M. Renard; W. J. Neumann

1960-05-01T23:59:59.000Z

360

Matrix Optimization for the MALDI-TOF-MS Analysis of Trace Biodiesel Components (Poster)  

SciTech Connect

Trace biodiesel components that could reduce the fuel's operability in cold weather are analyzed using MALDI-TOF mass spectrometry.

McAlpin, C. R.; Voorhees, K. J.; Alleman, T. L.; McCormick, R. L.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Emissions of trace gases and aerosols during the open combustion of biomass  

NLE Websites -- All DOE Office Websites (Extended Search)

Emissions of trace gases and aerosols during the open combustion of biomass Emissions of trace gases and aerosols during the open combustion of biomass in the laboratory Title Emissions of trace gases and aerosols during the open combustion of biomass in the laboratory Publication Type Journal Article Year of Publication 2009 Authors McMeeking, Gavin R., Sonia M. Kreidenweis, Stephen Baker, Christian M. Carrico, Judith C. Chow, Jeffrey Collett L. Jr., Wei Min Hao, Amanda S. Holden, Thomas W. Kirchstetter, William C. Malm, Hans Moosmuller, Amy P. Sullivan, and Cyle E. Wold Journal Journal of Geophysical Research Volume 114 Abstract We characterized the gas- and speciated aerosol-phase emissions from the open combustion of 33 different plant species during a series of 255 controlled laboratory burns during the Fire Laboratory at Missoula Experiments (FLAME). The plant species we tested were chosen to improve the existing database for U.S. domestic fuels: laboratory-based emission factors have not previously been reported for many commonly burned species that are frequently consumed by fires near populated regions and protected scenic areas. The plants we tested included the chaparral species chamise, manzanita, and ceanothus, and species common to the southeastern United States (common reed, hickory, kudzu, needlegrass rush, rhododendron, cord grass, sawgrass, titi, and wax myrtle). Fire-integrated emission factors for gas-phase CO2, CO, CH4, C2-4 hydrocarbons, NH3, SO2, NO, NO2, HNO3, and particle-phase organic carbon (OC), elemental carbon (EC), SO4 2, NO3, Cl, Na+, K+, and NH4 + generally varied with both fuel type and with the fire-integrated modified combustion efficiency (MCE), a measure of the relative importance of flaming- and smoldering-phase combustion to the total emissions during the burn. Chaparral fuels tended to emit less particulate OC per unit mass of dry fuel than did other fuel types, whereas southeastern species had some of the largest observed emission factors for total fine particulate matter. Our measurements spanned a larger range of MCE than prior studies, and thus help to improve estimates of the variation of emissions with combustion conditions for individual fuels.

362

Visualization methods for high-resolution, transient, 3-D, finite element situations  

SciTech Connect

Scientific visualization is the process whereby numerical data is transformed into a visual form to augment the process of discovery and understanding. Visualizing the data generated by large-scale, transient, three-dimensional finite element simulations poses many challenges due to geometric complexity, the presence of multiple materials and multiple element types, and the inherent unstructured nature of the meshes. In this paper, the direct use of finite element data structures, nodal assembly procedures, and element interpolants for volumetric adaptive surface extraction, surface rendering, vector grids and particle tracing is discussed. A brief description of a {open_quotes}direct-to-disk{close_quotes} animation system is presented, and case studies which demonstrate the use of isosurfaces, vector plots, cutting planes, reference surfaces and particle tracing are then discussed in the context of several case studies for transient incompressible viscous flow, and acoustic fluid-structure interaction simulations. An overview of the implications of massively parallel computers on visualization is presented to highlight the issues in parallel visualization methodology, algorithms. data locality and the ultimate requirements for temporary and archival data storage and network bandwidth.

Christon, M.A.

1995-01-10T23:59:59.000Z

363

Jyotish: Constructive approach for context predictions of people movement from joint Wifi/Bluetooth trace  

Science Conference Proceedings (OSTI)

It is well known that people movement exhibits a high degree of repetition since people visit regular places and make regular contacts for their daily activities. This paper presents a novel framework named Jyotish, which constructs a predictive model ... Keywords: Bluetooth trace, People movement prediction, People movement trace, Wifi trace

Long Vu; Quang Do; Klara Nahrstedt

2011-12-01T23:59:59.000Z

364

TRACE METAL CONTENT OF COAL AND ASH AS DETERMINED USING SCANNINGELECTRON MICROSCOPYWITE  

E-Print Network (OSTI)

TRACE METAL CONTENT OF COAL AND ASH AS DETERMINED USING SCANNINGELECTRON MICROSCOPYWITE WAVELENGTH Grand Forks, ND 58202-9018 Keywords: scanning electron microscopy, trace metals, coal analysis ABSTRACT Scanningelectron microscopy with wavelength-dispersive spectrometry has been used to measure trace metals in coal

Laughlin, Robert B.

365

A New Paradigm for Intelligent Tutoring Systems: Example-Tracing Tutors  

Science Conference Proceedings (OSTI)

The Cognitive Tutor Authoring Tools (CTAT) support creation of a novel type of tutors called example-tracing tutors. Unlike other types of ITSs (e.g., model-tracing tutors, constraint-based tutors), exampletracing tutors evaluate student behavior by ... Keywords: ITS architectures, authoring tools, behavior of tutoring systems, cognitive tutors, example-tracing tutors, programming by demonstration

Vincent Aleven; Bruce M. Mclaren; Jonathan Sewall; Kenneth R. Koedinger

2009-04-01T23:59:59.000Z

366

A Reference Based Analysis Framework for Analyzing System Call Traces  

SciTech Connect

Reference based analysis (RBA) is a novel data mining tool for exploring a test data set with respect to a reference data set. The power of RBA lies in it ability to transform any complex data type, such as symbolic sequences and multi-variate categorical data instances, into a multivariate continuous representation. The transformed representation not only allows visualization of the complex data, which cannot be otherwise visualized in its original form, but also allows enhanced anomaly detection in the transformed feature space. We demonstrate the application of the RBA framework in analyzing system call traces and show how the transformation results in improved intrusion detection performance over state of art data mining based intrusion detection methods developed for system call traces.

Chandola, Varun [ORNL; Kumar, Vipin [University of Minnesota; Boriah, Shyam [University of Minnesota

2010-01-01T23:59:59.000Z

367

Tracing And Quantifying Magmatic Carbon Discharge In Cold Groundwaters-  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Tracing And Quantifying Magmatic Carbon Discharge In Cold Groundwaters- Lessons Learned From Mammoth Mountain, Usa Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Tracing And Quantifying Magmatic Carbon Discharge In Cold Groundwaters- Lessons Learned From Mammoth Mountain, Usa Details Activities (3) Areas (1) Regions (0) Abstract: A major campaign to quantify the magmatic carbon discharge in cold groundwaters around Mammoth Mountain volcano in eastern California was carried out from 1996 to 1999. The total water flow from all sampled cold springs was >=1.8_107 m3/yr draining an area that receives an estimated

368

Ray tracing a three dimensional scene using a grid  

DOE Patents (OSTI)

Ray tracing a three-dimensional scene using a grid. One example embodiment is a method for ray tracing a three-dimensional scene using a grid. In this example method, the three-dimensional scene is made up of objects that are spatially partitioned into a plurality of cells that make up the grid. The method includes a first act of computing a bounding frustum of a packet of rays, and a second act of traversing the grid slice by slice along a major traversal axis. Each slice traversal includes a first act of determining one or more cells in the slice that are overlapped by the frustum and a second act of testing the rays in the packet for intersection with any objects at least partially bounded by the one or more cells overlapped by the frustum.

Wald, Ingo; Ize, Santiago; Parker, Steven G; Knoll, Aaron

2013-02-26T23:59:59.000Z

369

Energy Efficient Steam Trapping of Trace Heating Systems  

E-Print Network (OSTI)

Since as many as 40-60% of a plant's steam traps may be used on steam tracer lines, it is essential to select the correct, properly sized 'traps'; to optimize the efficient removal of condensate while providing maximum heat transfer to maintain desired product temperatures and greatly reduce steam losses. Factors related to achieving uniform product temperatures and maximum heat transfer rates and energy efficiency are: 1.Types and Methods used for Steam Tracing; 2. Systematic heat balance required to achieve economic tracer lengths; 3. Maximum allowable trapping distance for specific applications 4.Data important to determine condensate loads; 5. Trap selection, sizing, good installation practices, and proper maintenance. Using an engineered approach to steam trapping of trace heating systems have resulted in stable tracer line temperatures while reducing steam consumption 10-50% with minimum maintenance.

Krueger, R. G.; Wilt, G. W.

1981-01-01T23:59:59.000Z

370

Electric Utility Trace Substances Synthesis Report: Volumes 1-4  

Science Conference Proceedings (OSTI)

A comprehensive evaluation of human health risks from trace substances in electric utility stack plumes was carried out for each of 600 U.S. power plants. Emissions estimates were based on measurements at 43 units. Under realistic assumptions of exposure and plant configuration, inhalation risks were well below one in one million for increased cancer likelihood to all individuals exposed to emissions from power plants. Mercury case studies at four power plants showed health risks lower than federal guide...

1995-01-11T23:59:59.000Z

371

Electric Utility Trace Substances Synthesis Report: Volumes 1-4  

Science Conference Proceedings (OSTI)

A comprehensive evaluation of human health risks from trace substances in electric utility stack plumes was carried out for each of 600 U.S. power plants. Emissions estimates were based on measurements at 43 units. Under realistic assumptions of exposure and plant configuration, inhalation risks were well below one in one million for increased cancer likelihood to all individuals exposed to emissions from power plants. Mercury case studies at four power plants showed health risks lower than federal guide...

1995-01-10T23:59:59.000Z

372

Sampling and analysis of natural gas trace constituents  

DOE Green Energy (OSTI)

Major and minor components of natural gas are routinely analyzed by gas chromatography (GC), using a thermal conductivity (TC). The best results obtained by these methods can report no better than 0.01 mole percent of each measured component. Even the extended method of analysis by flame ionization detector (FID) can only improve on the detection limit of hydrocarbons. The gas industry needs better information on all trace constituents of natural gas, whether native or inadvertently added during gas processing that may adversely influence the operation of equipment or the safety of the consumer. The presence of arsenic and mercury in some gas deposits have now been documented in international literature as causing not only human toxicity but also damaging to the field equipment. Yet, no standard methods of sampling and analysis exist to provide this much needed information. In this paper the authors report the results of a three-year program to develop an extensive array of sampling and analysis methods for speciation and measurement of trace constituents of natural gas. A cryogenic sampler operating at near 200 K ({minus}99 F) and at pipeline pressures up to 12.4 {times} 10{sup 6}Pa (1800 psig) has been developed to preconcentrate and recover all trace constituents with boiling points above butanes. Specific analytical methods have been developed for speciating and measurement of many trace components (corresponding to US EPA air toxics) by GC-AED and GC-MS, and for determining various target compounds by other techniques. Moisture, oxygen and sulfur contents are measured on site using dedicated field instruments. Arsenic, mercury and radon are sampled by specific solid sorbents for subsequent laboratory analysis.

Attari, A.; Chao, S.

1993-09-01T23:59:59.000Z

373

Trace Metals Determination in Flue Gas Desulfurization Water  

Science Conference Proceedings (OSTI)

Flue gas desulfurization (FGD) scrubbers are used on coal-fired power plants to reduce sulfur dioxide emissions to air. While effective for this purpose, wet FGD scrubbers produce an aqueous blowdown stream that contains trace levels of metals adsorbed from flue gas. Power plant owners need to measure concentrations of these metals for purposes of process control, discharge monitoring, or design and operation of wastewater treatment systems. FGD water has proven to be a very difficult matrix to analyze a...

2009-12-28T23:59:59.000Z

374

Vascular flora and gradient analysis of the Natchez Trace Parkway  

E-Print Network (OSTI)

Vascular plant collections were made on the Natchez Trace Parkway over a 15 month period beginning in August 2004. These collections along with previous work done by the National Park Service (NPS) produced a flora of 750 genera and 2196 species in 167 families. Five collection trips were made so as to include as much of the growing season as possible (August 2004, March, May, July and October 2005). Specimens were collected from 500 sites along the Parkway as well as at 50 quadrat locations. The largest families, by species numbers, are Asteraceae (298 species), Poaceae (236 species), Cyperaceae (148 species), Fabaceae (133 species) and Rosaceae (73 species), which accounted for 40.4% of the flora. A Detrended Correspondence Analysis (DCA) and TWINSPAN analysis were performed on data collected from 49 sites along the length of the Natchez Trace Parkway (NATR). It was found that the major environmental gradient (Axis 1) affecting the species composition of the site was to be the level of disturbance. The sites with high levels of disturbance were characterized as grassland field sites, while those areas with low levels of disturbance were characterized as forested sites. The TWINSPAN analysis produced 29 groupings, of which eight were found to be valid groupings. Through the course of the study, almost 450 new species were added to the current knowledge of the Natchez Trace Parkway by the NPS. In addition, one prospective endangered species was located, which will aid the NPS in future management practices within the park.

Phillips, Nena Mae Monique

2006-08-01T23:59:59.000Z

375

Constraints on AGB models from the heavy-element composition of presolar SiC grains  

E-Print Network (OSTI)

Presolar SiC grains formed around Asymptotic Giant Branch (AGB) stars during their carbon-rich phase and contain heavy elements in trace amounts showing the signature of the slow neutron capture process (s process). Thanks to recent advances in analysis techniques, SiC data now provide extremely precise information on neutron capture cross sections and AGB models. For example, high-precision data for Mo in single SiC grains indicate that a revision of the 95Mo neutron capture cross section is needed, while data for Zr indicates that the 22Ne(alpha,n)25Mg reaction cannot be a dominant neutron source for the s process in AGB stars. We present model predictions for the composition of Fe-peak elements in AGB stars. These elements could be analysed in the near future thus providing further stringent constraints to our understanding of AGB stars.

M. Lugaro; A. M. Davis; R. Gallino; M. R. Savina; M. J. Pellin

2004-10-12T23:59:59.000Z

376

The PVM 3.4 tracing facility and XPVM 1.1  

SciTech Connect

One problem in developing a parallel program is monitoring its behavior for debugging and performance tuning. This paper discusses an enhanced tracing facility and tool for PVM (Parallel Virtual Machine), a message passing library for parallel processing in a heterogeneous environment. PVM supports mixed collections of workstation clusters, shared-memory multiprocessors, and massively parallel processors. The upcoming release of PVM, Version 3.4, contains a new, improved tracing facility which provides flexible, efficient access to run-time program information. This new tracing system supports a buffering mechanism to reduce perturbation of user applications caused by tracing, and a more flexible trace event definition scheme based on a self-defining data format. The new scheme expedites collection of program execution histories and allows for integration of user-defined custom trace events. Tracing instrumentation is built into the PVM library and allows on-the-fly adjustments to each task`s trace event mask, for control over the level of tracing detail. The graphical console and monitor XPVM have also been updated for better access to the new tracing functionality. Several new views have been implemented to utilize the additional tracing information now possible, including user-defined events. XPVM system has also been optimized for better real-time monitoring.

Kohl, J.A.; Geist, G.A.

1996-08-01T23:59:59.000Z

377

Proposed Uniformat II Classification of Bridge Elements  

Science Conference Proceedings (OSTI)

... Because sub-elements can be tied into a work breakdown structure, they significantly enhance the usefulness of an elemental classification across ...

2011-06-24T23:59:59.000Z

378

Elemental Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Energy LLC Jump to: navigation, search Name Elemental Energy LLC Place New York, New York Zip 10065 Sector Solar Product Elemental Energy develops, owns and operates...

379

Element Labs Inc | Open Energy Information  

Open Energy Info (EERE)

Inc. Place Santa Clara, California Zip 95054 Product Element Labs is a developer of LED video technology for entertainment, architectural, and signage. References Element...

380

Spent graphite fuel element processing  

SciTech Connect

The Department of Energy currently sponsors two programs to demonstrate the processing of spent graphite fuel elements. General Atomic in San Diego operates a cold pilot plant to demonstrate the processing of both US and German high-temperature reactor fuel. Exxon Nuclear Idaho Company is demonstrating the processing of spent graphite fuel elements from Rover reactors operated for the Nuclear Rocket Propulsion Program. This work is done at Idaho National Engineering Laboratory, where a hot facility is being constructed to complete processing of the Rover fuel. This paper focuses on the graphite combustion process common to both programs.

Holder, N.D.; Olsen, C.W.

1981-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

FUEL ELEMENT FOR NUCLEAR REACTOR  

DOE Patents (OSTI)

A nuclear fuel element comprising a large number og wafers of fissionable material and a protective jacket having compartments holding these wafers is described. The compartments of the jacket aid the removal of heat from the wafers, keep the wafers or fragments thereof from migrating in the jacket, and permit the escape of gaseous fission products.

Carney, K.G. Jr.

1959-07-14T23:59:59.000Z

382

Single element laser beam shaper  

DOE Patents (OSTI)

A single lens laser beam shaper for converting laser beams from any spatial profile to a flat-top or uniform spatial profile. The laser beam shaper includes a lens having two aspheric surfaces. The beam shaper significantly simplifies the overall structure in comparison with conventional 2-element systems and therefore provides great ease in alignment and reduction of cost.

Zhang, Shukui (Yorktown, VA); Michelle D. Shinn (Newport News, VA)

2005-09-13T23:59:59.000Z

383

Tracing Fuel Component Carbon in the Emissions from Diesel Engines  

DOE Green Energy (OSTI)

The addition of oxygenates to diesel fuel can reduce particulate emissions, but the underlying chemical pathways for the reductions are not well understood. While measurements of particulate matter (PM), unburned hydrocarbons (HC), and carbon monoxide (CO) are routine, determining the contribution of carbon atoms in the original fuel molecules to the formation of these undesired exhaust emissions has proven difficult. Renewable bio-derived fuels (ethanol or bio-diesel) containing a universal distribution of contemporary carbon are easily traced by accelerator mass spectrometry (AMS). These measurements provide general information about the emissions of bio-derived fuels. Another approach exploits synthetic organic chemistry to place {sup 14}C atoms in a specific bond position in a specific fuel molecule. The highly labeled fuel molecule is then diluted in {sup 14}C-free petroleum-derived stock to make a contemporary petroleum fuel suitable for tracing. The specific {sup 14}C atoms are then traced through the combustion event to determine whether they reside in PM, HC, CO, CO{sub 2}, or other emission products. This knowledge of how specific molecular structures produce certain emissions can be used to refine chemical-kinetic combustion models and to optimize fuel composition to reduce undesired emissions. Due to the high sensitivity of the technique and the lack of appreciable {sup 14}C in fossil fuels, fuels for AMS experiments can be labeled with modern levels of {sup 14}C and still produce a strong signal. Since the fuel is not radioactive, emission tests can be conducted in any conventional engine lab, dynamometer facility, or on the open road.

Buchholz, B A; Mueller, C J; Martin, G C; Cheng, A S E; Dibble, R W; Frantz, B R

2002-10-14T23:59:59.000Z

384

The Transuranium Elements - Present Status: Nobel Lecture  

DOE R&D Accomplishments (OSTI)

The discovery of the transuranium elements and the work done on them up to the present time are reviewed. The properties of these elements, their relationship to other elements, their place in the periodic table, and the possibility of production and identification of other transuranium elements are discussed briefly.

Seaborg, G. T.

1951-12-12T23:59:59.000Z

385

Spatial distribution of elements in the spheroids by prostate tumor cells using synchrotron radiation x-ray fluorescence  

SciTech Connect

The formation of three-dimensional cell microspheres such as spheroids has attracted attention as a useful culture technique. In this study, we investigated the trace elemental distribution (mapping) in spheroids derived from tissue prostate cancer (PCa). The measurements were performed in standard geometry of 45 deg. incidence, exciting with a white beam and using an optical capillary with 20 {mu}m diameter collimation in the XRF beam line at the Synchrotron Light National Laboratory (Campinas, Brazil). The results showed that most elements analyzed presented non-uniform distribution. P, S and Cl showed similar elemental distribution in all the samples analyzed. K, Ca, Fe, and Cu showed different elemental distribution for the spheroids analyzed. Zinc presented more intense distributions in the spheroid central region for all spheroids analyzed.

Leitao, Roberta G.; Santos, Carlos Antonio N.; Junior, Antonio Palumbo; Souza, Pedro A. V. R.; Canellas, Catarine G. L.; Anjos, Marcelino J.; Nasciutti, Luiz E.; Lopes, Ricardo T. [Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil); Laboratorio de Biotecnologia - Bioengenharia - DIPRO, Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial, Xerem. 25250-020, Duque de Caxias, RJ (Brazil); Laboratorio de Interacoes Celulares, ICB-CCS, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941- 590, Rio de Janeiro, RJ (Brazil); Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil); Laboratorio de Interacoes Celulares, ICB-CCS, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941- 590, Rio de Janeiro, RJ (Brazil); Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil)

2012-05-17T23:59:59.000Z

386

Property:GRR/Elements | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:GRR/Elements Jump to: navigation, search Property Name GRR/Elements Property Type Page Description List of elements included in this section. The value of this property is derived automatically by the portion of the element template that controls the content displayed when elements are embedded in sections. Pages using the property "GRR/Elements" Showing 25 pages using this property. (previous 25) (next 25) G GRR/Elements/ + GRR/Elements/1a.21 to 1a.22 - Proposed Land Use Plan (New Plan) or Final Environmental Impact Statement (Revision) + GRR/Elements/12-FD-a.10 - Written Concurrence with the "No Effect" and/or "No Likely Adverse Effects" Determination + GRR/Elements/12-FD-a.10 - Written Concurrence with the "No Effect" and/or "No Likely Adverse Effects" Determination +

387

The trace anomaly and dynamical vacuum energy in cosmology  

Science Conference Proceedings (OSTI)

The trace anomaly of conformal matter implies the existence of massless scalar poles in physical amplitudes involving the stress-energy tensor. These poles may be described by a local effective action with massless scalar fields, which couple to classical sources, contribute to gravitational scattering processes, and can have long range gravitational effects at macroscopic scales. In an effective field theory approach, the effective action of the anomaly is an infrared relevant term that should be added to the Einstein-Hilbert action of classical General Relativity to take account of macroscopic quantum effects. The additional scalar degrees of freedom contained in this effective action may be understood as responsible for both the Casimir effect in flat spacetime and large quantum backreaction effects at the horizon scale of cosmological spacetimes. These effects of the trace anomaly imply that the cosmological vacuum energy is dynamical, and its value depends on macroscopic boundary conditions at the cosmological horizon scale, rather than sensitivity to the extreme ultraviolet Planck scale.

Mottola, Emil [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

388

Element Labs | Open Energy Information  

Open Energy Info (EERE)

Element Labs Element Labs Address 3350 Scott Blvd Place Santa Clara, California Zip 95054 Sector Efficiency Product LED Producer Website http://www.elementlabs.com/ Coordinates 37.380364°, -121.9823779° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.380364,"lon":-121.9823779,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

389

Element Power | Open Energy Information  

Open Energy Info (EERE)

Power Power Jump to: navigation, search Logo: Element Power Name Element Power Address 421 SW Sixth Avenue, Suite 1000 Place Portland, Oregon Zip 97204 Sector Wind energy Product uility-scale solar and wind projects Website http://www.elpower.com/ Coordinates 45.520812°, -122.67791° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.520812,"lon":-122.67791,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

390

FUEL ELEMENT FOR NUCLEAR REACTORS  

DOE Patents (OSTI)

A fuel element is designed which is particularly adapted for reactors of high power density used to generate steam for the production of electricity. The fuel element consists of inner and outer concentric tubes forming an annular chamber within which is contained fissionable fuel pellet segments, wedge members interposed between the fuel segments, and a spring which, acting with wedge members, urges said fuel pellets radially into contact against the inner surface of the outer tube. The wedge members may be a fertile material convertible into fissionable fuel material by absorbing neutrons emitted from the fissionable fuel pellet segments. The costly grinding of cylindrical fuel pellets to close tolerances for snug engagement is reduced because the need to finish the exact size is eliminated. (AEC)

Bassett, C.H.

1961-11-21T23:59:59.000Z

391

Replacement element for automobile thermostat  

Science Conference Proceedings (OSTI)

This patent describes a thermostat replacement element for use in a cooling system in which a continuous stream of coolant normally flows from a radiator through a thermostat to an engine. The thermostat is mounted within a mounting cavity and permits maximum flow of coolant through the cooling system when in an open position. The replacement element comprises a disc-shaped member having a diameter substantially corresponding to the diameter of the mounting cavity. The member is provided with apertures of a predetermined size to permit flow of coolant therethrough at a rate generally corresponding to the rate of flow of coolant through the thermostat when the thermostat is in an open position.

Ferrari, W.

1988-06-07T23:59:59.000Z

392

Tracing the behavior of parallel applications on extreme-scale systems |  

NLE Websites -- All DOE Office Websites (Extended Search)

Tracing the behavior of parallel applications on extreme-scale systems Tracing the behavior of parallel applications on extreme-scale systems January 3, 2014 Tweet EmailPrint Event-tracing tools have proved vital for understanding how parallel applications behave. But new challenges make the use of event tracing on extreme-scale machines problematic. Tracing tools generate large amounts of data, which can overload the parallel file system and skew the application being studied. To remedy this problem, researchers from Argonne National Laboratory, the Technische Universität Dresden in Germany, and Oak Ridge National Laboratory have devised a new technique that enables event tracing on exascale systems. Scientists who have been using existing performance analysis tools find that these frequently do not scale to large systems. And even if they do

393

The Five Elements of Brazing  

Science Conference Proceedings (OSTI)

Table 1   The five elements of brazing...Fixture mass vs. assembly mass Cost Cost of electricity Cost of natural gas Cost of alternate fuels Heat loss of furnaces Cost of heating fixtures, belts, etc. Compatibility with atmosphere Temperature measurement Type of thermocouple (T/C) T/C Calibration T/C Drift T/C vs. atmosphere Effect of heat (±)...

394

Tracing Paleoclimate over the Past 25,000 Years Using Evidence from Radiogenic Isotopes  

E-Print Network (OSTI)

The objective of this dissertation is to apply radiogenic isotopes extracted from marine sediments to investigate aspects of global climate change over the past 25 kyr, especially ocean and atmospheric circulation, continental aridity, and hydrology. By focusing on the geochemical records from marine sediments and authigenic precipitates preserved in these sediments, I aim to better understand climate forcing and feedback mechanisms, which are critical to models of climate change. Firstly, I have investigated the dynamics of the Intertropical Convergence Zone (ITCZ) over the past 25 kyr in the eastern equatorial Pacific by fingerprinting dust provenance using radiogenic isotopes (Nd, Sr, Pb) and trace elements (Fe, Si, Ba) in the detrital fraction of marine sediments along a transect across the equator at 110W. Results from this study suggest no glacial-Holocene difference in the mean position of the ITCZ, but a more northerly, possibly stronger, deglacial ITCZ. Secondly, I have applied Nd isotope ratios from authigenic precipitates extracted from marine sediments and those from fish debris to trace past intermediate water circulation changes on glacial-interglacial and millennial timescales. The authigenic Nd isotope record from the Florida Straits suggests a reduced circulation of Antarctic Intermediate Water (AAIW) into the tropical North Atlantic during the Younger Dryas (YD) and Heinrich 1 (H1) events, associated with a significant reduction in AMOC. However, in the Southern Caribbean, apparent deviations in the Nd isotopic compositions between the acid-reductive leachate and the fish debris suggest that the leachate method is not reliable at this location and that it needs to be tested in more detail in various oceanic settings. In the Southern Caribbean, the fish debris Nd isotope results suggest a two-step recovery of the upper North Atlantic Deep Water during the last deglaciation. Comparing our new fish debris Nd isotope data to authigenic Nd isotope data for sediments from the Florida Straits and the Demarara Rise, we propose that glacial and deglacial AAIW does not penetrate beyond the lower depth limit of modern AAIW in the tropical North Atlantic. Both studies suggest a tight connection between Atlantic intermediate water circulation variability and high-latitude North Atlantic climate change.

Xie, Ruifang

2013-05-01T23:59:59.000Z

395

Evaluation of the impact of contaminant on trace metal content of compost.  

E-Print Network (OSTI)

??Literature reviews indicated that batteries, ferrous, non-ferrous materials, and electronic products are major contributors of trace metals in municipal solid waste (MSW). In order to (more)

Zhou, Lixian

2010-01-01T23:59:59.000Z

396

Emissions of trace gases and aerosols during the open combustion of biomass in the laboratory  

E-Print Network (OSTI)

J. A. Brass, and V. G. Ambrosia (1988a), Trace gas emissionsA. Brass, and V. G. Ambrosia (1988b), Particulate-emissions

McMeeking, Gavin R.

2009-01-01T23:59:59.000Z

397

Sub-microradian Surface Slope Metrology with the ALS Developmental Long Trace Profiler  

E-Print Network (OSTI)

upgraded LTP-II at the ALS Optical Metrology Laboratory,Slope Metrology with the ALS Developmental Long TraceAdvanced Light Source (ALS) Optical Metrology Laboratory (

Yashchuk, Valeriy V.

2009-01-01T23:59:59.000Z

398

A Novel Sorbent-Based Process for High Temperature Trace Metals...  

NLE Websites -- All DOE Office Websites (Extended Search)

Sorbent-Based Process for High Temperature Trace Metals Removal from Coal-Derived Syngas Description Gasification converts coal and other heavy feedstocks into synthesis gas...

399

Emissions of trace gases and aerosols during the open combustion of biomass in the laboratory  

E-Print Network (OSTI)

in press), Organic aerosols in the earth's atmosphere,loss, and trace gas and aerosol emissions during laboratoryproperties of biomass burn aerosols, Geophysical Research

McMeeking, Gavin R.

2009-01-01T23:59:59.000Z

400

The New Element Americium (Atomic Number 95)  

DOE R&D Accomplishments (OSTI)

Several isotopes of the new element 95 have been produced and their radiations characterized. The chemical properties of this tripositive element are similar to those of the typical tripositive lanthanide rare-earth elements. Element 95 is different from the latter in the degree and rate of formation of certain compounds of the complex ion type, which makes possible the separation of element 95 from the lanthanide rare-earths. The name americium (after the Americas) and the symbol Am are suggested for the element on the basis of its position as the sixth member of the actinide rare-earth series, analogous to europium, Eu, of the lanthanide series.

Seaborg, G.T.; James, R.A.; Morgan, L.O.

1948-01-00T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Monitoring arrangement for vented nuclear fuel elements  

DOE Patents (OSTI)

In a nuclear fuel reactor core, fuel elements are arranged in a closely packed hexagonal configuration, each fuel element having diametrically opposed vents permitting 180.degree. rotation of the fuel elements to counteract bowing. A grid plate engages the fuel elements and forms passages for communicating sets of three, four or six individual vents with respective monitor lines in order to communicate vented radioactive gases from the fuel elements to suitable monitor means in a manner readily permitting detection of leakage in individual fuel elements.

Campana, Robert J. (Solana Beach, CA)

1981-01-01T23:59:59.000Z

402

Trace Table Based Approach for Pipelined Microprocessor Verification  

E-Print Network (OSTI)

This paper presents several techniques for formally verifying pipelined microprocessor implementations that contain out-of-order execution and dynamic resolution of data-dependent hazards. Our principal technique models the trace of executed instructions using a tablebased representation called a MAETT. We express invariant properties of pipelined implementations by specifying relations between elds in the MAETT. To show the viability of this technique, we have proved the correctness of a simple out-of-order completion pipelined microprocessor design using the ACL2 theorem prover. This verication was performed incrementally by proving that the specied relations hold for all microarchitectural states reachable from a ushed implementation state, eventually permitting us to prove that the entire pipelined machine design implements its ISA specication.

Jun Sawada; Warren A. Hunt, Jr.

1997-01-01T23:59:59.000Z

403

Standoff ultraviolet raman scattering detection of trace levels of explosives.  

Science Conference Proceedings (OSTI)

Ultraviolet (UV) Raman scattering with a 244-nm laser is evaluated for standoff detection of explosive compounds. The measured Raman scattering albedo is incorporated into a performance model that focused on standoff detection of trace levels of explosives. This model shows that detection at {approx}100 m would likely require tens of seconds, discouraging application at such ranges, and prohibiting search-mode detection, while leaving open the possibility of short-range point-and-stare detection. UV Raman spectra are also acquired for a number of anticipated background surfaces: tile, concrete, aluminum, cloth, and two different car paints (black and silver). While these spectra contained features in the same spectral range as those for TNT, we do not observe any spectra similar to that of TNT.

Kulp, Thomas J.; Bisson, Scott E.; Reichardt, Thomas A.

2011-10-01T23:59:59.000Z

404

Essential Grid Workflow Monitoring Elements  

SciTech Connect

Troubleshooting Grid workflows is difficult. A typicalworkflow involves a large number of components networks, middleware,hosts, etc. that can fail. Even when monitoring data from all thesecomponents is accessible, it is hard to tell whether failures andanomalies in these components are related toa given workflow. For theGrid to be truly usable, much of this uncertainty must be elim- inated.We propose two new Grid monitoring elements, Grid workflow identifiersand consistent component lifecycle events, that will make Gridtroubleshooting easier, and thus make Grids more usable, by simplifyingthe correlation of Grid monitoring data with a particular Gridworkflow.

Gunter, Daniel K.; Jackson, Keith R.; Konerding, David E.; Lee,Jason R.; Tierney, Brian L.

2005-07-01T23:59:59.000Z

405

METHOD OF MAKING FUEL ELEMENTS  

DOE Patents (OSTI)

A method is described for fabricating fuel elements, particularly for enclosing a plate of metal with a second metal by inserting the plate into an aperture of a frame of a second plate, placing a sheet of the second metal on each of opposite faces of the assembled plate and frame, purging with an inert gas the air from the space within the frame and the sheets while sealing the seams between the frame and the sheets, exhausting the space, purging the space with air, re-exhausting the spaces, sealing the second aperture, and applying heat and pressure to bond the sheets, the plate, and the frame to one another.

Bean, C.H.; Macherey, R.E.

1959-12-01T23:59:59.000Z

406

FUEL ELEMENT FOR NUCLEAR REACTORS  

DOE Patents (OSTI)

A nuclear reactor fuel element comprising high density ceramic fissionable material enclosed in a tubular cladding of corrosion-resistant material is described. The fissionable material is in the form of segments of a tube which have cooperating tapered interfaces which produce outward radial displacement when the segments are urged axially together. A resilient means is provided within the tubular housing to constantly urge the fuel segments axially. This design maintains the fuel material in tight contacting engagement against the inner surface of the outer cladding tube to eliminate any gap therebetween which may be caused by differential thermal expansion between the fuel material and the material of the tube.

Bassett, C.H.

1961-05-01T23:59:59.000Z

407

Unipotent elements in algebraic groups  

E-Print Network (OSTI)

and orthogonal Lie algebras . . . . . . . . . . . . 30 2.5 Unipotent canonical forms in G and GF . . . . . . . . . . . . . . 33 3 Unipotent elements in small characteristic 37 3.1 Introduction and statement of results . . . . . . . . . . . . . . . . 37 3... -power, then there exists a Springer morphism such that the Frobenius endomorphism defined in the same way on g is compatible 7 1. INTRODUCTION with F ; see Section 2.5 for explicit examples of such Springer morphisms. 1.4 Classification results 1.4.1 Let G be as before...

Clarke, Matthew Charles

2012-01-10T23:59:59.000Z

408

Questions and Answers - Who discovered the elements?  

NLE Websites -- All DOE Office Websites (Extended Search)

Will scientists everfind smaller elements? Will scientists ever<br>find smaller elements? Previous Question (Will scientists ever find smaller elements?) Questions and Answers Main Index Next Question (What are boiling and melting points?) What are boiling and melting points? Who discovered the element gold, silver, copper, neon, etc...? Below is a list of all of the known elements, who they were discovered by and the year they were discovered. Some elements, such as gold, silver and iron, have been known since ancient times, so it is impossible to credit a single person for their discovery. Other elements were discovered around the same time by two or more scientists who were working independently of each other. In these cases, each scientist is listed along with the year they made their discovery. Other elements were discovered by teams of

409

Unified framework for finite element assembly  

Science Conference Proceedings (OSTI)

At the heart of any finite element simulation is the assembly of matrices and vectors from discrete variational forms. We propose a general interface between problem-specific and general-purpose components of finite element programs. This interface ...

M. S. Alnaes; A. Logg; K-A. Mardal; O. Skavhaug; H. P. Langtangen

2009-11-01T23:59:59.000Z

410

Stacked Switchable Element and Diode Combination  

DOE Patents (OSTI)

A device (10) comprises a semiconductor diode (12) and a switchable element (14) positioned in stacked adjacent relationship so that the semiconductor diode (12) and the switchable element (14) are electrically connected in series with one another. The switchable element (14) is switchable from a low-conductance state to a high-conductance state in response to the application of a forming voltage to the switchable element (14).

Branz, H. M.; Wang, Q.

2006-06-27T23:59:59.000Z

411

Fuel elements of thermionic converters  

DOE Green Energy (OSTI)

Work on thermionic nuclear power systems has been performed in Russia within the framework of the TOPAZ reactor program since the early 1960s. In the TOPAZ in-core thermionic convertor reactor design, the fuel element`s cladding is also the thermionic convertor`s emitter. Deformation of the emitter can lead to short-circuiting and is the primary cause of premature TRC failure. Such deformation can be the result of fuel swelling, thermocycling, or increased unilateral pressure on the emitter due to the release of gaseous fission products. Much of the work on TRCs has concentrated on preventing or mitigating emitter deformation by improving the following materials and structures: nuclear fuel; emitter materials; electrical insulators; moderator and reflector materials; and gas-exhaust device. In addition, considerable effort has been directed toward the development of experimental techniques that accurately mimic operational conditions and toward the creation of analytical and numerical models that allow operational conditions and behavior to be predicted without the expense and time demands of in-pile tests. New and modified materials and structures for the cores of thermionic NPSs and new fabrication processes for the materials have ensured the possibility of creating thermionic NPSs for a wide range of powers, from tens to several hundreds of kilowatts, with life spans of 5 to 10 years.

Hunter, R.L. [ed.] [Sandia National Labs., Albuquerque, NM (United States). Environmental Systems Assessment Dept.; Gontar, A.S.; Nelidov, M.V.; Nikolaev, Yu.V.; Schulepov, L.N. [RI SIA Lutch, Podolsk (Russian Federation)

1997-01-01T23:59:59.000Z

412

Expanding the Model-Tracing Architecture: A 3rd Generation Intelligent Tutor for Algebra Symbolization  

Science Conference Proceedings (OSTI)

Following Computer Aided Instruction systems, 2nd generation tutors are Model-Tracing Tutors (MTTs) (Anderson & Pelletier, 1991) which are intelligent tutoring systems that have been very successful at aiding student learning, but have not reached the ... Keywords: Intelligent tutoring systems, algebra, model-tracing, student learning, teaching strategies

Neil T. Heffernan; Kenneth R. Koedinger; Leena Razzaq

2008-04-01T23:59:59.000Z

413

Efficient hardware implementation of Ray Tracing based on an embedded software for intersection computation  

Science Conference Proceedings (OSTI)

Parallel implementations of Ray Tracing have been enabling real time performance, as the algorithm is embarrassingly parallel. However, in order to achieve both interactivity and real time performance, the algorithm should run at a high frame rates, ... Keywords: Computer graphics, FPGA, Parallel architecture, Ray Tracing

Alexandre S. Nery, Nadia Nedjah, Felipe M. G. FranA

2013-03-01T23:59:59.000Z

414

Measurements of Trace Gas Fluxes by MAX-DOAS In Texas City, Texas spring 2009  

E-Print Network (OSTI)

Measurements of Trace Gas Fluxes by MAX- DOAS In Texas City, Texas ­ spring 2009 Elaina Shawver and NO2 from oil refineries in Texas City, TX by utilizing the spatial inhomogeneity of trace gas/hr, respectively. Determine facility averaged fluxes of NO2, HCHO, and SO2 in Texas City Determine source specific

Collins, Gary S.

415

Parallel radio-wave propagation modeling with image-based ray tracing techniques  

Science Conference Proceedings (OSTI)

Ray tracing is a technique based on the numerical simulation of geometrical optics and the uniform theory of diffraction, two well-known approximate methods for estimating a high-frequency electromagnetic field, based on the ray theory of field propagation. ... Keywords: Load balancing, Message passing interface, Performance evaluation, Radio-wave propagation, Ray tracing, Wireless communications

T. E. Athanaileas; G. E. Athanasiadou; G. V. Tsoulos; D. I. Kaklamani

2010-12-01T23:59:59.000Z

416

LaserSPECks:: laser SPECtroscopic trace-gas sensor networks - sensor integration and applications  

Science Conference Proceedings (OSTI)

We introduce a novel laser spectroscopic trace-gas sensor platform, LaserSPECks that integrates recently developed miniature quartz-enhanced photoacoustic spectroscopy (QE-PAS) gas sensing technology. This universal platform uses infrared laser spectroscopy ... Keywords: lasers, sensors, spectroscopy, trace gas sensing

Stephen So; Farinaz Koushanfar; Anatoliy Kosterev; Frank Tittel

2007-04-01T23:59:59.000Z

417

Enabling event tracing at leadership-class scale through I/O forwarding middleware  

Science Conference Proceedings (OSTI)

Event tracing is an important tool for understanding the performance of parallel applications. As concurrency increases in leadership-class computing systems, the quantity of performance log data can overload the parallel file system, perturbing the ... Keywords: I/O forwarding, atomic append, event tracing

Thomas Ilsche; Joseph Schuchart; Jason Cope; Dries Kimpe; Terry Jones; Andreas Knpfer; Kamil Iskra; Robert Ross; Wolfgang E. Nagel; Stephen Poole

2012-06-01T23:59:59.000Z

418

SecTTS: A secure track & trace system for RFID-enabled supply chains  

Science Conference Proceedings (OSTI)

Due to the highly sensitive business information communicated within RFID-enabled supply chain networks, there is an urgent need for a secure and effective track & trace system. In this paper, we aim to design and implement a secure track & trace system ... Keywords: EPCglobal network, RFID, Relay policy, Security, Supply chains

Jie Shi; Yingjiu Li; Wei He; Darren Sim

2012-08-01T23:59:59.000Z

419

Effects of coal-derived trace species on performance of molten carbonate fuel cells. Final report  

DOE Green Energy (OSTI)

The Carbonate Fuel Cell is a very promising option for highly efficient generation of electricity from many fuels. If coal-gas is to be used, the interactions of coal-derived impurities on various fuel cell components need to be understood. Thus the effects on Carbonate Fuel Cell performance due to ten different coal-derived contaminants viz., NH{sub 3}, H{sub 2}S, HC{ell}, H{sub 2}Se, AsH{sub 3}, Zn, Pb, Cd, Sn, and Hg, have been studied at Energy Research Corporation. Both experimental and theoretical evaluations were performed, which have led to mechanistic insights and initial estimation of qualitative tolerance levels for each species individually and in combination with other species. The focus of this study was to investigate possible coal-gas contaminant effects on the anode side of the Carbonate Fuel Cell, using both out-of-cell thermogravimetric analysis by isothermal TGA, and fuel cell testing in bench-scale cells. Separate experiments detailing performance decay in these cells with high levels of ammonia contamination (1 vol %) and with trace levels of Cd, Hg, and Sn, have indicated that, on the whole, these elements do not affect carbonate fuel cell performance. However, some performance decay may result when a number of the other six species are present, singly or simultaneously, as contaminants in fuel gas. In all cases, tolerance levels have been estimated for each of the 10 species and preliminary models have been developed for six of them. At this stage the models are limited to isothermal, benchscale (300 cm{sup 2} size) single cells. The information obtained is expected to assist in the development of coal-gas cleanup systems, while the contaminant performance effects data will provide useful basic information for modeling fuel cell endurance in conjunction with integrated gasifier/fuel-cell systems (IGFC).

Not Available

1992-05-01T23:59:59.000Z

420

Effects of coal-derived trace species on performance of molten carbonate fuel cells  

DOE Green Energy (OSTI)

The Carbonate Fuel Cell is a very promising option for highly efficient generation of electricity from many fuels. If coal-gas is to be used, the interactions of coal-derived impurities on various fuel cell components need to be understood. Thus the effects on Carbonate Fuel Cell performance due to ten different coal-derived contaminants viz., NH{sub 3}, H{sub 2}S, HC{ell}, H{sub 2}Se, AsH{sub 3}, Zn, Pb, Cd, Sn, and Hg, have been studied at Energy Research Corporation. Both experimental and theoretical evaluations were performed, which have led to mechanistic insights and initial estimation of qualitative tolerance levels for each species individually and in combination with other species. The focus of this study was to investigate possible coal-gas contaminant effects on the anode side of the Carbonate Fuel Cell, using both out-of-cell thermogravimetric analysis by isothermal TGA, and fuel cell testing in bench-scale cells. Separate experiments detailing performance decay in these cells with high levels of ammonia contamination (1 vol %) and with trace levels of Cd, Hg, and Sn, have indicated that, on the whole, these elements do not affect carbonate fuel cell performance. However, some performance decay may result when a number of the other six species are present, singly or simultaneously, as contaminants in fuel gas. In all cases, tolerance levels have been estimated for each of the 10 species and preliminary models have been developed for six of them. At this stage the models are limited to isothermal, benchscale (300 cm{sup 2} size) single cells. The information obtained is expected to assist in the development of coal-gas cleanup systems, while the contaminant performance effects data will provide useful basic information for modeling fuel cell endurance in conjunction with integrated gasifier/fuel-cell systems (IGFC).

Not Available

1992-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Tool for Rapid Assessment of City Energy (TRACE) | Open Energy Information  

Open Energy Info (EERE)

Tool for Rapid Assessment of City Energy (TRACE) Tool for Rapid Assessment of City Energy (TRACE) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Tool for Rapid Assessment of City Energy (TRACE) Agency/Company /Organization: Energy Sector Management Assistance Program of the World Bank Sector: Climate Focus Area: Renewable Energy, Buildings, Energy Efficiency Topics: Low emission development planning, Pathways analysis Resource Type: Training materials, Software/modeling tools User Interface: Website Website: esmap.org/esmap/TRACE Cost: Free Equivalent URI: cleanenergysolutions.org/content/tool-rapid-assessment-city-energy-tra Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance References: TRACE[1] This tool offers cities a quick and easy way to assess their energy

422

Enabling Event Tracing at Leadership-Class Scale through I/O Forwarding Middleware  

Science Conference Proceedings (OSTI)

Event tracing is an important tool for understanding the performance of parallel applications. As concurrency increases in leadership-class computing systems, the quantity of performance log data can overload the parallel file system, perturbing the application being observed. In this work we present a solution for event tracing at leadership scales. We enhance the I/O forwarding system software to aggregate and reorganize log data prior to writing to the storage system, significantly reducing the burden on the underlying file system for this type of traffic. Furthermore, we augment the I/O forwarding system with a write buffering capability to limit the impact of artificial perturbations from log data accesses on traced applications. To validate the approach, we modify the Vampir tracing tool to take advantage of this new capability and show that the approach increases the maximum traced application size by a factor of 5x to more than 200,000 processors.

Ilsche, Thomas [Technische Universitat Dresden; Schuchart, Joseph [Technische Universitat Dresden; Cope, Joseph [Argonne National Laboratory (ANL); Kimpe, Dries [Argonne National Laboratory (ANL); Jones, Terry R [ORNL; Knuepfer, Andreas [Technische Universitat Dresden; Iskra, Kamil [Argonne National Laboratory (ANL); Ross, Robert [Argonne National Laboratory (ANL); Nagel, Wolfgang E. [Technische Universitat Dresden; Poole, Stephen W [ORNL

2012-01-01T23:59:59.000Z

423

T-720: Blue Coat Director HTTP Trace Processing Flaw Permits Cross-Site  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0: Blue Coat Director HTTP Trace Processing Flaw Permits 0: Blue Coat Director HTTP Trace Processing Flaw Permits Cross-Site Scripting Attacks T-720: Blue Coat Director HTTP Trace Processing Flaw Permits Cross-Site Scripting Attacks September 19, 2011 - 8:45am Addthis PROBLEM Blue Coat Director HTTP Trace Processing Flaw Permits Cross-Site Scripting Attacks. PLATFORM: All versions of Director prior to 5.5.2.3 are vulnerable. ABSTRACT: A vulnerability was reported in Blue Coat Director. A remote user can conduct cross-site scripting attacks. reference LINKS: Blue Coat Advisories ID: SA62 SecurityTracker Alert ID: 1026061 Blue Coat Director 510 Blue Coat SGME 5 IMPACT ASSESSMENT: Medium Discussion: An attacker can use the HTTP TRACE method to echo malicious script back to the client as part of a Cross Site Scripting (XSS) attack. No

424

V-011: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support Lets  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support 1: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support Lets Remote Users Obtain Potentially Sensitive Information V-011: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support Lets Remote Users Obtain Potentially Sensitive Information October 26, 2012 - 6:00am Addthis PROBLEM: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support Lets Remote Users Obtain Potentially Sensitive Information PLATFORM: Software version: 6.2.3, 6.2.3.1 ABSTRACT: A vulnerability was reported in IBM Tivoli Monitoring. REFERENCE LINKS: IBM Support Document: 1614003 IBM Support Portal SecurityTracker Alert ID: 1027692 IMPACT ASSESSMENT: High DISCUSSION: A remote user may be able to conduct HTTP TRACE and HTTP TRACK attacks to access sensitive information from the HTTP headers.

425

Tibetan Medicine, Its Humors and Elements  

E-Print Network (OSTI)

of which contained atoms of one kind only. They were divided according to how many atoms a molecule of each contained. Then when the scientists suc ceeded in splitting the atom, many more elements were discovered. In the Buddhist philosophical system... , aggression and delusion. The elements What I want to say about the elements is that each humour is symbolically connected with an element: bile with fire, phlegm with water, and wind with air. The traditional number of elements in the West is four: fire...

Winder, Marianne

1994-01-01T23:59:59.000Z

426

Estimating local thickness for finite element analysis  

Science Conference Proceedings (OSTI)

Within the development of motor vehicles, crash safety is one of the most important attributes. To comply with the ever increasing requirements of shorter cycle times and costs reduction, car manufacturers keep intensifying the use of virtual development ... Keywords: FEA mesh, automotive crash simulations, ray tracing, structural modelling, thickness estimation

Vnio Ferreira; Lus Paulo Santos; Ricardo Simoes; Markus Franzen; Omar O. Ghouati

2010-11-01T23:59:59.000Z

427

Renewable Energy Community: Key Elements  

NLE Websites -- All DOE Office Websites (Extended Search)

of Energy of Energy Office of Energy Efficiency & Renewable Energy National Renewable Energy Laboratory Innovation for Our Energy Future A Renewable Energy Community: Key Elements A reinvented community to meet untapped customer needs for shelter and transportation with minimal environmental impacts, stable energy costs, and a sense of belonging N. Carlisle, J. Elling, and T. Penney Technical Report NREL/TP-540-42774 January 2008 NREL is operated by Midwest Research Institute ● Battelle Contract No. DE-AC36-99-GO10337 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle

428

Conversion coefficients for superheavy elements  

E-Print Network (OSTI)

In this paper we report on internal conversion coefficients for Z = 111 to Z = 126 superheavy elements obtained from relativistic Dirac-Fock (DF) calculations. The effect of the atomic vacancy created during the conversion process has been taken into account using the so called "Frozen Orbital" approximation. The selection of this atomic model is supported by our recent comparison of experimental and theoretical conversion coefficients across a wide range of nuclei. The atomic masses, valence shell electron configurations, and theoretical atomic binding energies required for the calculations were adopted from a critical evaluation of the published data. The new conversion coefficient data tables presented here cover all atomic shells, transition energies from 1 keV up to 6000 keV, and multipole orders of 1 to 5. A similar approach was used in our previous calculations [1] for Z = 5 - 110.

T. Kibdi; M. B. Trzhaskovskaya; M. Gupta; A. E. Stuchbery

2011-03-03T23:59:59.000Z

429

Data transmission element for downhole drilling components  

DOE Patents (OSTI)

A robust data transmission element for transmitting information between downhole components, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The data transmission element components include a generally U-shaped annular housing, a generally U-shaped magnetically conductive, electrically insulating element such as ferrite, and an insulated conductor. Features on the magnetically conducting, electrically insulating element and the annular housing create a pocket when assembled. The data transmission element is filled with a polymer to retain the components within the annular housing by filling the pocket with the polymer. The polymer can bond with the annular housing and the insulated conductor but preferably not the magnetically conductive, electrically insulating element. A data transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT)

2006-01-31T23:59:59.000Z

430

Online elemental analysis of process gases with ICP-OES: A case study on waste wood combustion  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Simultaneous measurements of 23 elements in process gases of a waste wood combustor. Black-Right-Pointing-Pointer Mobile ICP spectrometer allows measurements of high quality at industrial plants. Black-Right-Pointing-Pointer Continuous online measurements with high temporal resolution. Black-Right-Pointing-Pointer Linear correlations among element concentrations in the raw flue gas were detected. Black-Right-Pointing-Pointer Novel sampling and calibration methods for ICP-OES analysis of process gases. - Abstract: A mobile sampling and measurement system for the analysis of gaseous and liquid samples in the field was developed. An inductively coupled plasma optical emission spectrometer (ICP-OES), which is built into a van, was used as detector. The analytical system was calibrated with liquid and/or gaseous standards. It was shown that identical mass flows of either gaseous or liquid standards resulted in identical ICP-OES signal intensities. In a field measurement campaign trace and minor elements in the raw flue gas of a waste wood combustor were monitored. Sampling was performed with a highly transport efficient liquid quench system, which allowed to observe temporal variations in the elemental process gas composition. After a change in feedstock an immediate change of the element concentrations in the flue gas was detected. A comparison of the average element concentrations during the combustion of the two feedstocks showed a high reproducibility for matrix elements that are expected to be present in similar concentrations. On the other hand elements that showed strong differences in their concentration in the feedstock were also represented by a higher concentration in the flue gas. Following the temporal variations of different elements revealed strong correlations between a number of elements, such as chlorine with sodium, potassium and zinc, as well as arsenic with lead, and calcium with strontium.

Wellinger, Marco, E-mail: marco.wellinger@gmail.com [General Energy Research Department, Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland); Ecole Polytechnique Federale de Lausanne (EPFL), School of Architecture, Civil and Environmental Engineering (ENAC-IIE), CH-1015 Lausanne (Switzerland); Wochele, Joerg; Biollaz, Serge M.A. [General Energy Research Department, Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland); Ludwig, Christian, E-mail: christian.ludwig@psi.ch [General Energy Research Department, Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland); Ecole Polytechnique Federale de Lausanne (EPFL), School of Architecture, Civil and Environmental Engineering (ENAC-IIE), CH-1015 Lausanne (Switzerland)

2012-10-15T23:59:59.000Z

431

Turbulence transmission in parallel modified shocks using ray tracing  

E-Print Network (OSTI)

We apply a semi-classical approach of handling waves as quasiparticle gas in a slowly varying flow -- analogous to ray tracing -- to calculate the Alfven wave transmission parameters, the resulting cross-helicity of the waves and the scattering-centre compression ratio, for cases where the shock thickness is large enough for the turbulent waves in the plasma to see the transition of the background flow parameters as smooth and slowly varying. For nonrelativistic shocks the wave transmission produces similar effects on the downstream turbulence and the scattering-centre compression ratio as does the transmission through a step shock: the downstream Alfven waves propagate predominantly towards the shock in the local plasma frame and, thus, the scattering-centre compression ratio is larger than the gas compression ratio. For thick relativistic shocks, however, we find qualitative differences with respect to the step-shock case: for low-Alfvenic-Mach-number shocks the downstream waves propagate predominantly away from the shock, and the scattering-centre compression ratio is lower than that of the gas. Thus, when taken into account, the Alfven wave transmission can decrease the efficiency of the first-order Fermi acceleration in a thick relativistic shock.

Joni Tammi; Rami Vainio

2006-09-14T23:59:59.000Z

432

TRACING SAGITTARIUS STRUCTURE WITH SDSS AND SEGUE IMAGING AND SPECTROSCOPY  

Science Conference Proceedings (OSTI)

We show that the Sagittarius dwarf tidal stream can be traced with very red K/M-giant stars, selected from Sloan Digital Sky Survey (SDSS) photometry. A subset of these stars are spectroscopically confirmed with SEGUE and SDSS spectra, and the distance scale of 2MASS and SDSS M giants is calibrated to the RR Lyrae distance scale. The absolute magnitude of the K/M-giant stars at the tip of the giant branch is M{sub g{sub 0}}=-1.0. The line-of-sight velocities of the M giant and blue horizontal-branch (BHB) stars that are spatially coincident with the Sgr dwarf tidal stream are consistent with those of previous authors, reinforcing the need for new models that can explain all of the Sgr tidal debris stream observations. We estimate stellar densities along the tidal tails that can be used to help constrain future models. The K/M giant, BHB, and F-turnoff stars in the lower surface brightness tidal stream that is adjacent to the main leading Sgr dwarf tidal tail have velocities and metallicities that are similar to those of the stars in the leading tidal tail. The ratio of K/M giants to BHBs and BHBs to F-turnoff stars are also similar for both branches of the leading tidal tail. We show that there is an additional low-metallicity tidal stream near the Sgr trailing tidal tail.

Yanny, Brian [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Newberg, Heidi Jo [Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute Troy, NY 12180 (United States); Johnson, Jennifer A. [Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States); Lee, Young Sun; Beers, Timothy C. [Department of Physics and Astronomy, CSCE: Center for the Study of Cosmic Evolution, and JINA: Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 (United States); Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Dan; Pan, Kaike; Simmons, Audrey; Snedden, Stephanie [Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States); Fiorentin, Paola Re [Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana (Slovenia); Harding, Paul [Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106 (United States)], E-mail: paola.refiorentin@fmf.uni-lj.si

2009-08-01T23:59:59.000Z

433

Tracing Sagittarius Structure with SDSS and SEGUE Imaging and Spectroscopy  

E-Print Network (OSTI)

We show that the Sagittarius dwarf tidal stream can be traced with very red K/M-giant stars selected from SDSS photometry. A subset of these stars are spectroscopically confirmed with SEGUE and SDSS spectra, and the distance scale of 2MASS and SDSS M giants is calibrated to the RR Lyrae distance scale. The absolute g band magnitude of the K/M-giant stars at the tip of the giant branch is M_g=-1.0. The line-of-sight velocities of the M giant and BHB stars that are spatially coincident with the Sgr dwarf tidal stream are consistent with those of previous authors, reinforcing the need for new models that can explain all of the Sgr tidal debris stream observations. We estimate stellar densities along the tidal tails that can be used to help constrain future models. The K/M-giant, BHB, and F-turnoff stars in the lower surface brightness tidal stream that is adjacent to the main leading Sgr dwarf tidal tail have velocities and metallicities that are similar to those of the stars in the leading tidal tail. The ratio...

Yanny, Brian; Johnson, Jennifer A; Lee, Young Sun; Beers, Timothy C; Bizyaev, Dmitry; Brewington, Howard; Fiorentin, Paola Re; Harding, Paul; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Dan; Pan, Kaike; Simmons, Audrey; Snedden, Stephanie

2009-01-01T23:59:59.000Z

434

Proposed Data Elements for PARS II Web Application | Department...  

NLE Websites -- All DOE Office Websites (Extended Search)

Proposed Data Elements for PARS II Web Application Proposed Data Elements for PARS II Web Application Proposed Data Elements for PARS II Web Application More Documents &...

435

Element One, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Element One, Element One, Inc. America's Next Top Energy Innovator Challenge 191524 likes Element One, Inc. National Renewable Energy Laboratory Element One's detection products will change the paradigm in the way hydrogen and other hazardous gas leaks are detected, achieving a new level of safety in existing industrial and emerging consumer environments. Element One has patented the only available coatings for the detection of hydrogen that change color reversibly or non-reversibly as desired to give both current and historical information about leaked hydrogen. In 2011, Element One optioned to license three National Renewable Energy Laboratory (NREL) patents that complement its own technologies. Completed and proposed testing of our indicators for different applications

436

Element One, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Element One, Element One, Inc. America's Next Top Energy Innovator Challenge 191524 likes Element One, Inc. National Renewable Energy Laboratory Element One's detection products will change the paradigm in the way hydrogen and other hazardous gas leaks are detected, achieving a new level of safety in existing industrial and emerging consumer environments. Element One has patented the only available coatings for the detection of hydrogen that change color reversibly or non-reversibly as desired to give both current and historical information about leaked hydrogen. In 2011, Element One optioned to license three National Renewable Energy Laboratory (NREL) patents that complement its own technologies. Completed and proposed testing of our indicators for different applications

437

Element One, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Element One, Element One, Inc. America's Next Top Energy Innovator Challenge 191524 likes Element One, Inc. National Renewable Energy Laboratory Element One's detection products will change the paradigm in the way hydrogen and other hazardous gas leaks are detected, achieving a new level of safety in existing industrial and emerging consumer environments. Element One has patented the only available coatings for the detection of hydrogen that change color reversibly or non-reversibly as desired to give both current and historical information about leaked hydrogen. In 2011, Element One optioned to license three National Renewable Energy Laboratory (NREL) patents that complement its own technologies. Completed and proposed testing of our indicators for different applications

438

Automated Fuel Element Closure Welding System  

SciTech Connect

The Automated Fuel Element Closure Welding System is a robotic device that will load and weld top end plugs onto nuclear fuel elements in a highly radioactive and inert gas environment. The system was developed at Argonne National Laboratory-West as part of the Fuel Cycle Demonstration. The welding system performs four main functions, it (1) injects a small amount of a xenon/krypton gas mixture into specific fuel elements, and (2) loads tiny end plugs into the tops of fuel element jackets, and (3) welds the end plugs to the element jackets, and (4) performs a dimensional inspection of the pre- and post-welded fuel elements. The system components are modular to facilitate remote replacement of failed parts. The entire system can be operated remotely in manual, semi-automatic, or fully automatic modes using a computer control system. The welding system is currently undergoing software testing and functional checkout.

Wahlquist, D.R.

1993-01-01T23:59:59.000Z

439

Automated Fuel Element Closure Welding System  

SciTech Connect

The Automated Fuel Element Closure Welding System is a robotic device that will load and weld top end plugs onto nuclear fuel elements in a highly radioactive and inert gas environment. The system was developed at Argonne National Laboratory-West as part of the Fuel Cycle Demonstration. The welding system performs four main functions, it (1) injects a small amount of a xenon/krypton gas mixture into specific fuel elements, and (2) loads tiny end plugs into the tops of fuel element jackets, and (3) welds the end plugs to the element jackets, and (4) performs a dimensional inspection of the pre- and post-welded fuel elements. The system components are modular to facilitate remote replacement of failed parts. The entire system can be operated remotely in manual, semi-automatic, or fully automatic modes using a computer control system. The welding system is currently undergoing software testing and functional checkout.

Wahlquist, D.R.

1993-03-01T23:59:59.000Z

440

Selected elemental distributions as determined by reference retorting of oil shale  

DOE Green Energy (OSTI)

In an effort to determine potential hindrances to the commercial development of the oil shale industry mass balance Fischer assay was used as a reference retorting method to examine the distribution of selected elements generally considered as contaminants in the final retort products. The elements examined were nitrogen, sulfur, silver, arsenic, barium, cadmium, chromium, copper, mercury, lead, selenium, and zinc. The shales used in this study were an eastern (New Albany) interim reference shale, a western (Green River Formation) interim reference shale, and a series of stratigraphically differentiated shales from Colorado corehole No. 1 in the Piceance Creek Basin. Analysis of the raw shale and retort products was accomplished using instrumental elemental methods including inductively coupled argon plasma spectroscopy and graphite furnace atomic absorption. Carbon balances indicated a high potential for achieving good mass closures existed. However, instrumental limitations combined with a high potential for contamination and/or representative sampling problems resulted in poor closures for many of the trace elements. Consistent closures were obtained for arsenic, barium, copper, and zinc. Given the operating conditions of the retort all elements under consideration remained primarily in the spent shale. Elements verified in the oil product included nitrogen and sulfur compounds and arsenic and selenium. The water product was also contaminated by nitrogen and sulfur compounds and arsenic and selenium. Evidence suggests the sulfur occurs primarily as organic sulfur. Quantitative results for the gas product were poor. However, sulfur and mercury were determined to be present at significant levels in the gas stream. The data presented here concurs with previously reported data that suggests the existence of several potential problem areas in the development of an oil shale industry. 42 refs., 1 fig., 42 tabs.

Johnson, L.S.

1986-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Rack for storing spent nuclear fuel elements  

DOE Patents (OSTI)

A rack for storing spent nuclear fuel elements in which a plurality of aligned rows of upright enclosures of generally square cross-sectional areas contain vertically disposed fuel elements. The enclosures are fixed at the lower ends thereof to a base. Pockets are formed between confronting walls of adjacent enclosures for receiving high absorption neutron absorbers, such as Boral, cadmium, borated stainless steel and the like for the closer spacing of spent fuel elements.

Rubinstein, Herbert J. (Los Gatos, CA); Clark, Philip M. (San Jose, CA); Gilcrest, James D. (San Jose, CA)

1978-06-20T23:59:59.000Z

442

2.10 Heavy Element Chemistry  

NLE Websites -- All DOE Office Websites (Extended Search)

sole effort addressing the fundamental science of the transuranium elements. Social Impact: This research helps DOE carry out what is perhaps its most important and...

443

Antenna Optimization By Using Finite Element Programs  

Science Conference Proceedings (OSTI)

Ion Cyclotron Frequency Heating and Current Drive play an important role in fusion experiments. The recent availability of powerful commercial finite element programs for PCs

F. Braun; ICRF Group

2005-01-01T23:59:59.000Z

444

OOF: Finite Element Analysis of Microstructures - TMS  

Science Conference Proceedings (OSTI)

Feb 7, 2007 ... Topic Title: OOF: Finite Element Analysis of Microstructures ... and the RAM available to perform a simulation spans somewhere between three...

445

NEW ALUMINUM OXIDE HUMIDITY ELEMENT. Second Report  

SciTech Connect

An aluminum oxide humidity sensing element is discussed. These elements, which were developed primarily for use in radiosonde weather measuring equipmeni, have a fast response over the entire humidity range and through a broad temperature range of -80 deg F to +l35 deg F. The elements are a marked improvement over previous humidity sensing devices, and their use in specially designed testers allows measurements to be made which were previously unobtainable. Among their other desirable features, these elements are small and lightweight, can be made inexpensively of readily available materials, and can be mass produced. (auth)

Stover, C.M.

1962-03-01T23:59:59.000Z

446

Spectral analysis method for detecting an element  

DOE Patents (OSTI)

A method for detecting an element is described and which includes the steps of providing a gamma-ray spectrum which has a region of interest which corresponds with a small amount of an element to be detected; providing nonparametric assumptions about a shape of the gamma-ray spectrum in the region of interest, and which would indicate the presence of the element to be detected; and applying a statistical test to the shape of the gamma-ray spectrum based upon the nonparametric assumptions to detect the small amount of the element to be detected.

Blackwood, Larry G [Idaho Falls, ID; Edwards, Andrew J [Idaho Falls, ID; Jewell, James K [Idaho Falls, ID; Reber, Edward L [Idaho Falls, ID; Seabury, Edward H [Idaho Falls, ID

2008-02-12T23:59:59.000Z

447

Process for synthesizing compounds from elemental powders  

DOE Patents (OSTI)

A process for synthesizing intermetallic compounds from elemental powders. The elemental powders are initially combined in ratio a which approximates the stoichiometric composition of the intermetallic compound. The mixed powders are then formed into a compact which is heat treated at a controlled rate of heating such that an exothermic reaction between the elements is initiated. The heat treatment may be performed under controlled conditions ranging from a vacuum (pressureless sintering) to compression (hot pressing) to produce a desired densification of the intermetallic compound. In a preferred form of the invention, elemental powders of Fe and Al are combined to form aluminide compounds of Fe{sub 3}Al and FeAl.

Rabin, B.H.; Wright, R.N.

1990-01-01T23:59:59.000Z

448

The New Element Berkelium (Atomic Number 97)  

DOE R&D Accomplishments (OSTI)

An isotope of the element with atomic number 97 has been discovered as a product of the helium-ion bombardment of americium. The name berkelium, symbol Bk, is proposed for element 97. The chemical separation of element 97 from the target material and other reaction products was made by combinations of precipitation and ion exchange adsorption methods making use of its anticipated (III) and (IV) oxidation states and its position as a member of the actinide transition series. The distinctive chemical properties made use of in its separation and the equally distinctive decay properties of the particular isotope constitute the principal evidence for the new element.

Seaborg, G. T.; Thompson, S. G.; Ghiorso, A.

1950-04-26T23:59:59.000Z

449

GRR/Elements/ | Open Energy Information  

Open Energy Info (EERE)

Page Edit History Facebook icon Twitter icon GRRElements < GRR | Elements Jump to: navigation, search Edit 1a.21 - Proposed Land Use Plan (New Plan) or Final Environmental...

450

NIST Elemental Data Index Version History  

Science Conference Proceedings (OSTI)

... RA (2011), Elemental Data Index (version 2.2). ... the Ground Levels and Ionization Energies for the ... to two new, online databases: "Energy Levels of ...

2011-12-09T23:59:59.000Z

451

Hydrogen and helium traces in type Ib-c supernovae  

E-Print Network (OSTI)

The spectroscopic properties of a selected optical photospheric spectra of core collapse supernovae (CCSNe) are investigated.Special attention is devoted to traces of hydrogen at early phases. The generated spectra are found to match the observed ones reasonably well, including a list of only 23 candidate ions. Guided by SN Ib 1990I, the observed trough near 6300\\AA is attributed to H$\\alpha$ in almost all Type Ib events, although in some objects it becomes too weak to be discernible, especially at later phases. Alternative line identifications are discussed. Differences in the way hydrogen manifests its presence within CCSNe are highlighted. In Type Ib SNe, the H$\\alpha$ contrast velocity (i.e. line velocity minus the photospheric velocity) seems to increase with time at early epochs, reaching values as high as 8000 km s$^{-1}$ around 15-20 days after maximum and then remains almost constant. The derived photospheric velocities, indicate a lower velocity for Type II SNe 1987A and 1999em as compared to SN Ic 1994I and SN IIb 1993J, while Type Ib events display a somewhat larger variation. The scatter, around day 20, is measured to be $\\sim$5000 km s$^{-1}$. Following two simple approaches, rough estimates of ejecta and hydrogen masses are given. A mass of hydrogen of approximately 0.02 $M_\\odot$ is obtained for SN 1990I, while SNe 1983N and 2000H ejected $\\sim$0.008 $M_\\odot$ and $\\sim$0.08 $M_\\odot$ of hydrogen, respectively. SN 1993J has a higher hydrogen mass, $\\sim 0.7$ $M_\\odot$ with a large uncertainty. A low mass and thin hydrogen layer with very high ejection velocities above the helium shell, is thus the most likely scenario for Type Ib SNe. Some interesting and curious issues relating to oxygen lines suggest future investigations.

A. Elmhamdi; I. J. Danziger; D. Branch; B. Leibundgut; E. Baron; R. P. Kirshner

2005-12-22T23:59:59.000Z

452

The Eight New Synthetic Elements  

SciTech Connect

In an early continuation of the investigation of the radioactive isotopes of element number 43 (technetium) Segre and Seaborg produced by the deuteron and neutron bombardment of molybdenum the isotope Tc{sup 99}, which they observed to decay by means of an isomeric transition with a half-life of 6.6 hours to a lower isomeric state with a half-life greater than 40 years. The upper isomeric state of this isotope was observed by Segre and C. S. Wu to be produced in the fission of uranium and more recently R. P. Schumann and also D. C. Lincoln and W. H Sullivan working on the Plutonium Project of the Manhattan District have independently observed the beta-particles of half-life about 10 years due to the lower isomeric state. Later work by E. E. Motta and G. E. Boyd sets a more accurate value of 9.4 x 10{sup 5} years for this half-life. Since this isotope is formed in rather large amounts, namely, a fission yield of 6.2%, in the slow neutron induced fission of uranium it is now possible to isolate technetium in weighable amounts and in rather substantial quantities. For example, a uranium pile operating at a power level of 10{sup 5} kw would produce about four grams of technetium, as the isotope T{sup 99}, per day. With such a long half-life the radioactivity associated with convenient amounts (some mg.) would be so small in intensity as to not create a problem provided reasonable care in handling were exercised.

Seaborg, Glenn T.

1947-11-01T23:59:59.000Z

453

Y8, Stress Mapping Analysis by Ray Tracing (SMART): A New ...  

Science Conference Proceedings (OSTI)

A fine grid made out of X-ray absorbing material is placed in the path of ... Stress Mapping Analysis by Ray Tracing (SMART), to fully determine the state of stress...

454

Atom Trap Trace Analysis at ANL | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Atom Trap Trace Analysis at ANL Atom Trap Trace Analysis at ANL Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives Atom Trap Trace Analysis at ANL Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: Atom Trap Trace Analysis (ATTA) to determine isotopic abundances. Developed at: Argonne National Laboratory Developed in: 1999-current

455

Two Carbon Dynamics and Trace Gas Data Sets from LBA Released  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Dynamics and Trace Gas Data Sets from LBA Released The ORNL DAAC and the LBA DIS announce the release of two data sets from the LBA-ECO component of the Large Scale...

456

The Transport of Trace Chemicals by Planetary Waves in the Stratosphere. Part 1: Steady Waves  

Science Conference Proceedings (OSTI)

When dissipation is present a forced planetary wave will interact with the zonal flow in the stratosphere and cause acceleration of the zonal wind, mean-zonal diabatic heating and net transport of trace chemicals. Quasi-geostrophic scaling is ...

Robert J. Kurzeja

1981-12-01T23:59:59.000Z

457

Inversion of long-lived trace gas emissions using combined Eulerian and Lagrangian chemical transport models  

E-Print Network (OSTI)

We present a method for estimating emissions of long-lived trace gases from a sparse global network of high-frequency observatories, using both a global Eulerian chemical transport model and Lagrangian particle dispersion ...

Manning, A. J.

458

Numerical Modeling of the Turbulent Fluxes of Chemically Reactive Trace Gases in the Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

Turbulent fluxes of chemically reactive trace gases in the neutral atmospheric boundary layer (ABL) were simulated with a one-dimensional, coupled diffusion-chemistry model. The effects of rapid chemical reactions were included with a suite of ...

W. Gao; M. L. Wesely

1994-07-01T23:59:59.000Z

459

The Gradient Genesis of Stratospheric Trace Species in the Subtropics and around the Polar Vortex  

Science Conference Proceedings (OSTI)

Mechanisms that control the formation and decay of meridional gradients in stratospheric trace species in the subtropics and around the polar vortex are investigated using a gradient genesis equation that uses mass-weighted isentropic zonal ...

Kazuyuki Miyazaki; Toshiki Iwasaki

2008-02-01T23:59:59.000Z

460

CARIBICCivil Aircraft for Global Measurement of Trace Gases and Aerosols in the Tropopause Region  

Science Conference Proceedings (OSTI)

The deployment of measurement equipment in passenger aircraft for the observation of atmospheric trace constituents is described. The package of automated instruments that is installed in a one-ton-capacity aircraft freight container positioned ...

C. A. M. Brenninkmeijer; P. J. Crutzen; H. Fischer; H. Gsten; W. Hans; G. Heinrich; J. Heintzenberg; M. Hermann; T. Immelmann; D. Kersting; M. Maiss; M. Nolle; A. Pitscheider; H. Pohlkamp; D. Scharffe; K. Specht; A. Wiedensohler

1999-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "trace elements cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Turbulent Transport and Heating of Trace Heavy Ions in Hot Magnetized Plasmas  

E-Print Network (OSTI)

Scaling laws for the transport and heating of trace heavy ions in low-frequency magnetized plasma turbulence are derived and compared with direct numerical simulations. The predicted dependences of turbulent fluxes and ...

Barnes, Michael

462

Fast Time Response Tunable Diode Laser Measurements of Atmospheric Trace Gases for Eddy Correlation  

Science Conference Proceedings (OSTI)

A fast-response, atmospheric trace gas monitor, based on the principle of tunable diode laser absorption spectroscopy, has been developed for making eddy correlation measurements of dry deposition fluxes. This system, which is capable of ...

G. L. Ogram; F. J. Northrup; G. C. Edwards

1988-08-01T23:59:59.000Z

463

High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy  

E-Print Network (OSTI)

Lincoln Laboratory of Massachusetts Institute of Technology has developed a technique known as dynamic photoacoustic spectroscopy (DPAS) that could enable remote detection of trace gases via a field-portable laser-based ...

Wynn, Charles M.

464

Worldwide Measurements of Atmospheric CO2 and Other Trace Gas Species Using Commercial Airlines  

Science Conference Proceedings (OSTI)

New automated observation systems for use in passenger aircraft to measure atmospheric carbon dioxide (CO2) and other trace species have been developed and are described in this paper. The Continuous CO2 Measuring Equipment (CME) is composed ...

T. Machida; H. Matsueda; Y. Sawa; Y. Nakagawa; K. Hirotani; N. Kondo; K. Goto; T. Nakazawa; K. Ishikawa; T. Ogawa

2008-10-01T23:59:59.000Z

465

Extended finite element method on polygonal and quadtree meshes  

E-Print Network (OSTI)

Adaptive re?nement for B-spline ?nite element, Internationalmatrix. The application of B-spline ?nite elements [27],

Tabarraei, A.; Sukumar, N.

2008-01-01T23:59:59.000Z

466

Trace component analysis of process hydrogen streams at the Wilsonville Advanced Coal Liquefaction Facility  

DOE Green Energy (OSTI)

This report summarizes subcontracted work done by the Radian Corporation to analyze trace components in process hydrogen streams at the Advanced Coal Liquefaction Facility in Wilsonville, Alabama. The data will be used to help define whether the gas streams to be treated in the hydrogen processing unit in the SRC-I Demonstration Plant will require further treatment to remove trace contaminants that could be explosive under certain conditions. 2 references.

Bronfenbrenner, J.C.

1983-09-01T23:59:59.000Z

467

Hamiltonian surface shaping with information theory and exergy#47;entropy control for collective plume tracing  

Science Conference Proceedings (OSTI)

The goal of this paper is to design and analyse distributed decentralised control laws for a team of robots performing collective plume tracing based on Hamiltonian surface shaping, information theory, and exergy/entropy control. The process ... Keywords: Fisher information, Hamiltonian systems, collective plume tracing, collective systems, decentralised control, distributed control, entropy control, exergy control, information theory, kinetic control, robot collaboration, robot control, robot kinematics, robots, surface shaping

Rush D. Robinett, III; David G. Wilson

2010-01-01T23:59:59.000Z

468

Elemental Modes of Occurrence in an Illinois #6 Coal and Fractions Prepared by Physical Separation Techniques at a Coal Preparation Plant  

Science Conference Proceedings (OSTI)

In order to gain better insight into elemental partitioning between clean coal and tailings, modes of occurrence have been determined for a number of major and trace elements (S, K, Ca, V, Cr, Mn, Fe, Zn, As, Se, Pb) in an Illinois No.6 coal and fractions prepared by physical separation methods at a commercial coal preparation plant. Elemental modes of occurrence were largely determined directly by XAFS or Moessbauer spectroscopic methods because the concentrations of major minerals and wt.% ash were found to be highly correlated for this coal and derived fractions, rendering correlations between individual elements and minerals ambiguous for inferring elemental modes of occurrence. Of the major elements investigated, iron and potassium are shown to be entirely inorganic in occurrence. Most (90%) of the iron is present as pyrite, with minor fractions in the form of clays and sulfates. All potassium is present in illitic clays. Calcium in the original coal is 80-90% inorganic and is divided between calcite, gypsum, and illite, with the remainder of the calcium present as carboxyl-bound calcium. In the clean coal fraction, organically associated Ca exceeds 50% of the total calcium. This organically-associated form of Ca explains the poorer separation of Ca relative to both K and ash. Among the trace elements, V and Cr are predominantly inorganically associated with illite, but minor amounts (5-15% Cr, 20-30% V) of these elements are also organically associated. Estimates of the V and Cr contents of illite are 420 ppm and 630 ppm, respectively, whereas these elements average 20 and 8 ppm in the macerals. Arsenic in the coal is almost entirely associated with pyrite, with an average As content of about 150 ppm, but some As ({approx} 10%) is present as arsenate due to minor oxidation of the pyrite. The mode of occurrence of Zn, although entirely inorganic, is more complex than normally noted for Illinois basin coals; about 2/3 is present in sphalerite, with lesser amounts associated with illite and a third form yet to be conclusively identified. The non-sulfide zinc forms are removed predominantly by the first stage of separation (rotary breaker), whereas the sphalerite is removed by the second stage (heavy media). Germanium is the only trace element determined to have a predominantly organic association.

Huggins, F.; Seidu, L; Shah, N; Huffman, G; Honaker, R; Kyger, J; Higgins, B; Robertson, J; Pal, S; Seehra, M

2009-01-01T23:59:59.000Z

469

MODERATOR ELEMENTS FOR UNIFORM POWER NUCLEAR REACTOR  

DOE Patents (OSTI)

This patent describes a method of obtaining a flatter flux and more uniform power generation across the core of a nuclear reactor. The method comprises using moderator elements having differing moderating strength. The elements have an increasing amount of the better moderating material as a function of radial and/or axial distance from the reactor core center. (AEC)

Balent, R.

1963-03-12T23:59:59.000Z

470

Damper mechanism for nuclear reactor control elements  

DOE Patents (OSTI)

A damper mechanism which provides a nuclear reactor control element decelerating function at the end of the scram stroke. The total damping function is produced by the combination of two assemblies, which operate in sequence. First, a tapered dashram assembly decelerates the control element to a lower velocity, after which a spring hydraulic damper assembly takes over to complete the final damping.

Taft, William Elwood (Los Gatos, CA)

1976-01-01T23:59:59.000Z

471

DISSOLUTION OF ZIRCONIUM-CONTAINING FUEL ELEMENTS  

DOE Patents (OSTI)

Uranium is recovered from spent uranium fuel elements containing or clad with zirconium. These fuel elements are placed in an anhydrous solution of hydrogen fluoride and nitrogen dioxide. Within this system uranium forms a soluble complex and zirconium forms an insoluble complex. The uranium can then be separated, treated, and removed from solution as uranium hexafluoride. (AEC)

Horn, F.L.

1961-12-12T23:59:59.000Z

472

NUCLEAR REACTOR FUEL-BREEDER FUEL ELEMENT  

DOE Patents (OSTI)

A fuel-breeder fuel element was developed for a nuclear reactor wherein discrete particles of fissionable material are dispersed in a matrix of fertile breeder material. The fuel element combines the advantages of a dispersion type and a breeder-type. (AEC)

Currier, E.L. Jr.; Nicklas, J.H.

1962-08-14T23:59:59.000Z

473

Machining processes simulation: specific finite element aspects  

Science Conference Proceedings (OSTI)

The paper presents a simulation tool designed to predict form errors of part surfaces obtained by face milling and turning processes. For these operations, the form error is often due to the flexibility of the workpiece and its supports. The finite element ... Keywords: finite elements, milling, simulation, turning

Luc Masset; Jean-Francois Debongnie

2004-07-01T23:59:59.000Z

474

The New Element Curium (Atomic Number 96)  

DOE R&D Accomplishments (OSTI)

Two isotopes of the element with atomic number 96 have been produced by the helium-ion bombardment of plutonium. The name curium, symbol Cm, is proposed for element 96. The chemical experiments indicate that the most stable oxidation state of curium is the III state.

Seaborg, G. T.; James, R. A.; Ghiorso, A.

1948-00-00T23:59:59.000Z

475

Correlation between some selected trace metal concentrations in six species of fish from the Arabian Sea  

Science Conference Proceedings (OSTI)

The role of trace metals in marine ecosystems has been keenly investigated during recent years. It is known that abundance of essential trace metals regulates the metal content in the organisms by homeostatic control mechanisms, which when cease to function cause essential trace metals to act in an either acutely or chronically toxic manner. Therefore, a correlation study based on essential and non-essential trace metal concentrations is imperative for extending the existing knowledge of bioaccumulation of trace metals in marine organisms. An attempt has been made in the present investigation to bring out quantitative correlations between the concentrations of iron, copper, lead and zinc in the edible muscle tissue of six species of marine fish: Salmon (salmon sole); tuna (thunnus thynnus); pomfret silver (pampus argenteus); Pomfret black (formioniger); long tail tuna (thynnus tonggel) and Indian oil sardine (sardinella longiceps). These fish are abundantly available in Pakistan along the coastal line of the Arabian Sea and have great commercial value. The computational analysis on the trace metal correlation was conducted using an MSTAT statistical package.

Ashraf, M.; Jaffar, M.

1988-07-01T23:59:59.000Z

476

Chemical Sensing for Buried Landmines - Fundamental Processes Influencing Trace Chemical Detection  

SciTech Connect

Mine detection dogs have a demonstrated capability to locate hidden objects by trace chemical detection. Because of this capability, demining activities frequently employ mine detection dogs to locate individual buried landmines or for area reduction. The conditions appropriate for use of mine detection dogs are only beginning to emerge through diligent research that combines dog selection/training, the environmental conditions that impact landmine signature chemical vapors, and vapor sensing performance capability and reliability. This report seeks to address the fundamental soil-chemical interactions, driven by local weather history, that influence the availability of chemical for trace chemical detection. The processes evaluated include: landmine chemical emissions to the soil, chemical distribution in soils, chemical degradation in soils, and weather and chemical transport in soils. Simulation modeling is presented as a method to evaluate the complex interdependencies among these various processes and to establish conditions appropriate for trace chemical detection. Results from chemical analyses on soil samples obtained adjacent to landmines are presented and demonstrate the ultra-trace nature of these residues. Lastly, initial measurements of the vapor sensing performance of mine detection dogs demonstrates the extreme sensitivity of dogs in sensing landmine signature chemicals; however, reliability at these ultra-trace vapor concentrations still needs to be determined. Through this compilation, additional work is suggested that will fill in data gaps to improve the utility of trace chemical detection.

PHELAN, JAMES M.

2002-05-01T23:59:59.000Z

477

William Fowler and Elements in the Stars  

NLE Websites -- All DOE Office Websites (Extended Search)

William Fowler and Elements in the Stars Resources with Additional Information William A. Fowler Courtesy AIP Emilio Segrè Visual Archives 'William A. Fowler ... shared the 1983 Nobel Prize in physics for his research into the creation of chemical elements inside stars ... . During his career in nuclear physics and nuclear astrophysics, which spanned more that 60 years, Fowler was primarily concerned with studies of fusion reactions--how the nuclei of lighter chemical elements fuse to create the heavier ones in a process known as nucleosynthesis. In 1957, Fowler coauthored ... the seminal paper "Synthesis of the Elements in the Stars", [which] showed that all of the elements from carbon to uranium could be produced by nuclear processes in stars, starting only with the hydrogen and helium produced in the Big Bang.

478

Rolling Element Bearing Stiffness Matrix Determination (Presentation)  

DOE Green Energy (OSTI)

Current theoretical bearing models differ in their stiffness estimates because of different model assumptions. In this study, a finite element/contact mechanics model is developed for rolling element bearings with the focus of obtaining accurate bearing stiffness for a wide range of bearing types and parameters. A combined surface integral and finite element method is used to solve for the contact mechanics between the rolling elements and races. This model captures the time-dependent characteristics of the bearing contact due to the orbital motion of the rolling elements. A numerical method is developed to determine the full bearing stiffness matrix corresponding to two radial, one axial, and two angular coordinates; the rotation about the shaft axis is free by design. This proposed stiffness determination method is validated against experiments in the literature and compared to existing analytical models and widely used advanced computational methods. The fully-populated stiffness matrix demonstrates the coupling between bearing radial, axial, and tilting bearing deflections.

Guo, Y.; Parker, R.

2014-01-01T23:59:59.000Z

479

Detection of trace phosphorus in steel using laser-induced breakdown spectroscopy combined with laser-induced fluorescence  

Science Conference Proceedings (OSTI)

Monitoring of light-element concentration in steel is very important for quality assurance in the steel industry. In this work, detection in open air of trace phosphorus (P) in steel using laser-induced breakdown spectroscopy (LIBS) combined with laser-induced fluorescence (LIF) has been investigated. An optical parametric oscillator wavelength-tunable laser was used to resonantly excite the P atoms within plasma plumes generated by a Q-switched Nd:YAG laser. A set of steel samples with P concentrations from 3.9 to 720 parts in 10{sup 6}(ppm) were analyzed using LIBS-LIF at wavelengths of 253.40 and 253.56 nm for resonant excitation of P atoms and fluorescence lines at wavelengths of 213.55 and 213.62 nm. The calibration curves were measured to determine the limit of detection for P in steel, which is estimated to be around 0.7 ppm. The results demonstrate the potential of LIBS-LIF to meet the requirements for on-line analyses in open air in the steel industry.

Shen, X. K.; Wang, H.; Xie, Z. Q.; Gao, Y.; Ling, H.; Lu, Y. F.

2009-05-01T23:59:59.000Z

480

Microwave plasma monitoring system for the elemental composition analysis of high temperature process streams  

DOE Patents (OSTI)

Microwave-induced plasma for continuous, real time trace element monitoring under harsh and variable conditions. The sensor includes a source of high power microwave energy and a shorted waveguide made of a microwave conductive, high temperature capability refractory material communicating with the source of the microwave energy to generate a plasma. The high power waveguide is constructed to be robust in a hot, hostile environment. It includes an aperture for the passage of gases to be analyzed and a spectrometer is connected to receive light from the plasma. Provision is made for real time in situ calibration. The spectrometer disperses the light, which is then analyzed by a computer. The sensor is capable of making continuous, real time quantitative measurements of desired elements, such as the heavy metals lead and mercury. The invention may be incorporated into a high temperature process device and implemented in situ for example, such as with a DC graphite electrode plasma arc furnace. The invention further provides a system for the elemental analysis of process streams by removing particulate and/or droplet samples therefrom and entraining such samples in the gas flow which passes through the plasma flame. Introduction of and entraining samples in the gas flow may be facilitated by a suction pump, regulating gas flow, gravity or combinations thereof.

Woskov, Paul P. (Bedford, MA); Cohn, Daniel R. (Chestnuthill, MA); Titus, Charles H. (Newtown Square, PA); Surma, Jeffrey E. (Kennewick, WA)

1997-01-01T23:59:59.000Z

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481

Questions and Answers - What is an element? How many elements are there?  

NLE Websites -- All DOE Office Websites (Extended Search)

An example of indirect evidenceused to study atoms? An example of indirect evidence<br>used to study atoms? Previous Question (An example of indirect evidence used to study atoms?) Questions and Answers Main Index Next Question (What is the difference between atoms and elements?) What is the difference betweenatoms and elements? What is an element? How many elements are there? An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is. If you had very, very good eyes and could look at the atoms in a sample of hydrogen, you would notice that most of the hydrogen atoms would have no neutrons, some of them would have one neutron and a few of them would have

482

ADVANCED GASIFICATION MERCURY/TRACE METAL CONTROL WITH MONOLITH TRAPS  

SciTech Connect

Two Corning monoliths and a non-carbon-based material have been identified as potential additives for mercury capture in syngas at temperatures above 400F and pressure of 600 psig. A new Corning monolith formulation, GR-F1-2189, described as an active sample appeared to be the best monolith tested to date. The Corning SR Liquid monolith concept continues to be a strong candidate for mercury capture. Both monolith types allowed mercury reduction to below 5-?g/m3 (~5 ppb), a current U.S. Department of Energy (DOE) goal for trace metal control. Preparation methods for formulating the SR Liquid monolith impacted the ability of the monolith to capture mercury. The Energy & Environmental Research Center (EERC)-prepared Noncarbon Sorbents 1 and 2 appeared to offer potential for sustained and significant reduction of mercury concentration in