Sample records for mi bakken formation

  1. SPE-139032-PP Field Development Strategies for Bakken Shale Formation

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    SPE-139032-PP Field Development Strategies for Bakken Shale Formation S.Zargari, SPE, S s a ckno wle dgm ent of S PE co p yrig ht. Abstract Bakken shale has been subjected to more attention coupled with advancements in horizontal drilling, increased the interest of oil companies for investment

  2. Geomechanical Study of Bakken Formation for Improved Oil Recovery

    SciTech Connect (OSTI)

    Ling, Kegang; Zeng, Zhengwen; He, Jun; Pei, Peng; Zhou, Xuejun; Liu, Hong; Huang, Luke; Ostadhassan, Mehdi; Jabbari, Hadi; Blanksma, Derrick; Feilen, Harry; Ahmed, Salowah; Benson, Steve; Mann, Michael; LeFever, Richard; Gosnold, Will

    2013-12-31T23:59:59.000Z

    On October 1, 2008 US DOE-sponsored research project entitled “Geomechanical Study of Bakken Formation for Improved Oil Recovery” under agreement DE-FC26-08NT0005643 officially started at The University of North Dakota (UND). This is the final report of the project; it covers the work performed during the project period of October 1, 2008 to December 31, 2013. The objectives of this project are to outline the methodology proposed to determine the in-situ stress field and geomechanical properties of the Bakken Formation in Williston Basin, North Dakota, USA to increase the success rate of horizontal drilling and hydraulic fracturing so as to improve the recovery factor of this unconventional crude oil resource from the current 3% to a higher level. The success of horizontal drilling and hydraulic fracturing depends on knowing local in-situ stress and geomechanical properties of the rocks. We propose a proactive approach to determine the in-situ stress and related geomechanical properties of the Bakken Formation in representative areas through integrated analysis of field and well data, core sample and lab experiments. Geomechanical properties are measured by AutoLab 1500 geomechanics testing system. By integrating lab testing, core observation, numerical simulation, well log and seismic image, drilling, completion, stimulation, and production data, in-situ stresses of Bakken formation are generated. These in-situ stress maps can be used as a guideline for future horizontal drilling and multi-stage fracturing design to improve the recovery of Bakken unconventional oil.

  3. Annual Logging Symposium, June 19-23, 2010 Formation Evaluation in the Bakken Complex Using Laboratory Core Data

    E-Print Network [OSTI]

    reservoirs, such as the Bakken Shale and its adjoining formations, the Three Forks dolomite, Sanish mudstone Using Laboratory Core Data and Advanced Logging Technologies Sandeep Ramakrishna, Ron Balliet, Danny and Lower Bakken Shales are organic rich source rocks. Hydrocarbon fluid identification, volumes

  4. Correlation and Stratigraphic Analysis of the Bakken and Sappington Formations in Montana 

    E-Print Network [OSTI]

    Adiguzel, Zeynep 1986-

    2012-09-24T23:59:59.000Z

    The Upper Devonian-Lower Mississippian (Late Fammenian-Tournaisian) Bakken Formation in the Williston Basin is one of the largest continuous oil fields in the U.S. The upper and the lower shale members are organic rich source rocks that supplied oil...

  5. Correlation and Stratigraphic Analysis of the Bakken and Sappington Formations in Montana

    E-Print Network [OSTI]

    Adiguzel, Zeynep 1986-

    2012-09-24T23:59:59.000Z

    The Upper Devonian-Lower Mississippian (Late Fammenian-Tournaisian) Bakken Formation in the Williston Basin is one of the largest continuous oil fields in the U.S. The upper and the lower shale members are organic rich source rocks that supplied oil...

  6. Subtask 1.8 - Investigation of Improved Conductivity and Proppant Applications in the Bakken Formation

    SciTech Connect (OSTI)

    Bethany Kurz; Darren Schmidt; Steven Smith Christopher Beddoe; Corey Lindeman; Blaise Mibeck

    2012-07-31T23:59:59.000Z

    Given the importance of hydraulic fracturing and proppant performance for development of the Bakken and Three Forks Formations within the Williston Basin, a study was conducted to evaluate the key factors that may result in conductivity loss within the reservoirs. Various proppants and reservoir rock cores were exposed to several different fracturing and formation fluids at reservoir conditions. The hardness of the rock cores and the strength of the proppants were evaluated prior to and following fluid exposure. In addition, the conductivity of various proppants, as well as formation embedment and spalling, was evaluated at reservoir temperatures and pressures using actual reservoir rock cores. The results of this work suggest that certain fluids may affect both rock and proppant strength, and therefore, fluid exposure needs to be considered in the field. In addition, conductivity decreases within the Bakken Formation appear to be a function of a variety of factors, including proppant and rock strength, as well as formation embedment and spalling. The results of this study highlight the need for advanced conductivity testing, coupled with quantification of formation embedment and spalling. Given the importance of proppant performance on conductivity loss and, ultimately, oil recovery, better understanding the effects of these various factors on proppant and rock strength in the field is vital for more efficient production within unconventional oil and gas reservoirs.

  7. SUBTASK 1.7 EVALUATION OF KEY FACTORS AFFECTING SUCCESSFUL OIL PRODUCTION IN THE BAKKEN FORMATION, NORTH DAKOTA PHASE II

    SciTech Connect (OSTI)

    Darren D. Schmidt; Steven A. Smith; James A. Sorensen; Damion J. Knudsen; John A. Harju; Edward N. Steadman

    2011-10-31T23:59:59.000Z

    Production from the Bakken and Three Forks Formations continues to trend upward as forecasts predict significant production of oil from unconventional resources nationwide. As the U.S. Geological Survey reevaluates the 3.65 billion bbl technically recoverable estimate of 2008, technological advancements continue to unlock greater unconventional oil resources, and new discoveries continue within North Dakota. It is expected that the play will continue to expand to the southwest, newly develop in the northeastern and northwestern corners of the basin in North Dakota, and fully develop in between. Although not all wells are economical, the economic success rate has been near 75% with more than 90% of wells finding oil. Currently, only about 15% of the play has been drilled, and recovery rates are less than 5%, providing a significant future of wells to be drilled and untouched hydrocarbons to be pursued through improved stimulation practices or enhanced oil recovery. This study provides the technical characterizations that are necessary to improve knowledge, provide characterization, validate generalizations, and provide insight relative to hydrocarbon recovery in the Bakken and Three Forks Formations. Oil-saturated rock charged from the Bakken shales and prospective Three Forks can be produced given appropriate stimulation treatments. Highly concentrated fracture stimulations with ceramic- and sand-based proppants appear to be providing the best success for areas outside the Parshall and Sanish Fields. Targeting of specific lithologies can influence production from both natural and induced fracture conductivity. Porosity and permeability are low, but various lithofacies units within the formation are highly saturated and, when targeted with appropriate technology, release highly economical quantities of hydrocarbons.

  8. 05643_GeoMech_Bakken | netl.doe.gov

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

    North Dakota (vertical coordinate exaggerated for display purposes) and (b)corresponding topography on surface Developed the Bakken Formation maximum and minimum horizontal in...

  9. The Bakken - An Unconventional Petroleum and Reservoir System

    SciTech Connect (OSTI)

    Sarg, J.

    2011-12-31T23:59:59.000Z

    An integrated geologic and geophysical study of the Bakken Petroleum System, in the Williston basin of North Dakota and Montana indicates that: (1) dolomite is needed for good reservoir performance in the Middle Bakken; (2) regional and local fractures play a significant role in enhancing permeability and well production, and it is important to recognize both because local fractures will dominate in on-structure locations; and (3) the organic-rich Bakken shale serves as both a source and reservoir rock. The Middle Bakken Member of the Bakken Formation is the target for horizontal drilling. The mineralogy across all the Middle Bakken lithofacies is very similar and is dominated by dolomite, calcite, and quartz. This Member is comprised of six lithofacies: (A) muddy lime wackestone, (B) bioturbated, argillaceous, calcareous, very fine-grained siltstone/sandstone, (C) planar to symmetrically ripple to undulose laminated, shaly, very fine-grained siltstone/sandstone, (D) contorted to massive fine-grained sandstone, to low angle, planar cross-laminated sandstone with thin discontinuous shale laminations, (E) finely inter-laminated, bioturbated, dolomitic mudstone and dolomitic siltstone/sandstone to calcitic, whole fossil, dolomitic lime wackestone, and (F) bioturbated, shaly, dolomitic siltstone. Lithofacies B, C, D, and E can all be reservoirs, if quartz and dolomite-rich (facies D) or dolomitized (facies B, C, E). Porosity averages 4-8%, permeability averages 0.001-0.01 mD or less. Dolomitic facies porosity is intercrystalline and tends to be greater than 6%. Permeability may reach values of 0.15 mD or greater. This appears to be a determinant of high productive wells in Elm Coulee, Parshall, and Sanish fields. Lithofacies G is organic-rich, pyritic brown/black mudstone and comprises the Bakken shales. These shales are siliceous, which increases brittleness and enhances fracture potential. Mechanical properties of the Bakken reveal that the shales have similar effective stress as the Middle Bakken suggesting that the shale will not contain induced fractures, and will contribute hydrocarbons from interconnected micro-fractures. Organic-rich shale impedance increases with a reduction in porosity and an increase in kerogen stiffness during the burial maturation process. Maturation can be directly related to impedance, and should be seismically mappable. Fractures enhance permeability and production. Regional fractures form an orthogonal set with a dominant NE-SW trend, and a less prominent NW-SE trend. Many horizontal 1 direction to intersect these fractures. Local structures formed by basement tectonics or salt dissolution generate both hinge parallel and hinge oblique fractures that may overprint and dominate the regional fracture signature. Horizontal microfractures formed by oil expulsion in the Bakken shales, and connected and opened by hydrofracturing provide permeability pathways for oil flow into wells that have been hydro-fractured in the Middle Bakken lithofacies. Results from the lithofacies, mineral, and fracture analyses of this study were used to construct a dual porosity Petrel geo-model for a portion of the Elm Coulee Field. In this field, dolomitization enhances reservoir porosity and permeability. First year cumulative production helps locate areas of high well productivity and in deriving fracture swarm distribution. A fracture model was developed based on high productivity well distribution, and regional fracture distribution, and was combined with favorable matrix properties to build a dual porosity geo-model.

  10. The Bakken-An Unconventional Petroleum and Reservoir System

    SciTech Connect (OSTI)

    Frederick Sarg

    2011-12-31T23:59:59.000Z

    An integrated geologic and geophysical study of the Bakken Petroleum System, in the Williston basin of North Dakota and Montana indicates that: (1) dolomite is needed for good reservoir performance in the Middle Bakken; (2) regional and local fractures play a significant role in enhancing permeability and well production, and it is important to recognize both because local fractures will dominate in on-structure locations; and (3) the organic-rich Bakken shale serves as both a source and reservoir rock. The Middle Bakken Member of the Bakken Formation is the target for horizontal drilling. The mineralogy across all the Middle Bakken lithofacies is very similar and is dominated by dolomite, calcite, and quartz. This Member is comprised of six lithofacies: (A) muddy lime wackestone, (B) bioturbated, argillaceous, calcareous, very fine-grained siltstone/sandstone, (C) planar to symmetrically ripple to undulose laminated, shaly, very fine-grained siltstone/sandstone, (D) contorted to massive fine-grained sandstone, to low angle, planar cross-laminated sandstone with thin discontinuous shale laminations, (E) finely inter-laminated, bioturbated, dolomitic mudstone and dolomitic siltstone/sandstone to calcitic, whole fossil, dolomitic lime wackestone, and (F) bioturbated, shaly, dolomitic siltstone. Lithofacies B, C, D, and E can all be reservoirs, if quartz and dolomite-rich (facies D) or dolomitized (facies B, C, E). Porosity averages 4-8%, permeability averages 0.001-0.01 mD or less. Dolomitic facies porosity is intercrystalline and tends to be greater than 6%. Permeability may reach values of 0.15 mD or greater. This appears to be a determinant of high productive wells in Elm Coulee, Parshall, and Sanish fields. Lithofacies G is organic-rich, pyritic brown/black mudstone and comprises the Bakken shales. These shales are siliceous, which increases brittleness and enhances fracture potential. Mechanical properties of the Bakken reveal that the shales have similar effective stress as the Middle Bakken suggesting that the shale will not contain induced fractures, and will contribute hydrocarbons from interconnected micro-fractures. Organic-rich shale impedance increases with a reduction in porosity and an increase in kerogen stiffness during the burial maturation process. Maturation can be directly related to impedance, and should be seismically mappable. Fractures enhance permeability and production. Regional fractures form an orthogonal set with a dominant NE-SW trend parallel to Ï?1, and a less prominent NW-SE trend. Many horizontal wells are drilled perpendicular to the Ï?1 direction to intersect these fractures. Local structures formed by basement tectonics or salt dissolution generate both hinge parallel and hinge oblique fractures that may overprint and dominate the regional fracture signature. Horizontal microfractures formed by oil expulsion in the Bakken shales, and connected and opened by hydrofracturing provide permeability pathways for oil flow into wells that have been hydro-fractured in the Middle Bakken lithofacies. Results from the lithofacies, mineral, and fracture analyses of this study were used to construct a dual porosity Petrel geo-model for a portion of the Elm Coulee Field. In this field, dolomitization enhances reservoir porosity and permeability. First year cumulative production helps locate areas of high well productivity and in deriving fracture swarm distribution. A fracture model was developed based on high productivity well distribution, and regional fracture distribution, and was combined with favorable matrix properties to build a dual porosity geo-model.

  11. Field Development Strategies for Bakken Shale Formation

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    Management · State of- the-art technology to exploit a reservoir while minimum capital investment and operation cost is used to achieve the maximum economic recovery · Reservoir Management is comprised of set of operations and decisions, by which a reservoir is identified, estimated, developed and evaluated from its

  12. Approach to Recover Hydrocarbons from Currently Off-Limit Areas of the Antrim Formation, MI Using Low-Impact Technologies

    SciTech Connect (OSTI)

    James Wood; William Quinlan

    2008-09-30T23:59:59.000Z

    The goal of this project was to develop and execute a novel drilling and completion program in the Antrim Shale near the western shoreline of Northern Michigan. The target was the gas in the Lower Antrim Formation (Upper Devonian). Another goal was to see if drilling permits could be obtained from the Michigan DNR that would allow exploitation of reserves currently off-limits to exploration. This project met both of these goals: the DNR (Michigan Department of Natural Resources) issued permits that allow drilling the shallow subsurface for exploration and production. This project obtained drilling permits for the original demonstration well AG-A-MING 4-12 HD (API: 21-009-58153-0000) and AG-A-MING 4-12 HD1 (API: 21-009-58153-0100) as well as for similar Antrim wells in Benzie County, MI, the Colfax 3-28 HD and nearby Colfax 2-28 HD which were substituted for the AG-A-MING well. This project also developed successful techniques and strategies for producing the shallow gas. In addition to the project demonstration well over 20 wells have been drilled to date into the shallow Antrim as a result of this project's findings. Further, fracture stimulation has proven to be a vital step in improving the deliverability of wells to deem them commercial. Our initial plan was very simple; the 'J-well' design. We proposed to drill a vertical or slant well 30.48 meters (100 feet) below the glacial drift, set required casing, then angle back up to tap the resource lying between the base to the drift and the conventional vertical well. The 'J'-well design was tested at Mancelona Township in Antrim County in February of 2007 with the St. Mancelona 2-12 HD 3.

  13. TOP-DOWN MODELING; PRACTICAL, FAST TRACK, RESERVOIR SIMULATION & MODELING FOR SHALE FORMATIONS Shahab D. Mohaghegh1 & Grant Bromhal2

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    development in the oil and gas industry and is being used on some shale formations. BAKKEN SHALE MuchTOP-DOWN MODELING; PRACTICAL, FAST TRACK, RESERVOIR SIMULATION & MODELING FOR SHALE FORMATIONS based on measure data, called Top-Down, Intelligent Reservoir Modeling for the shale formations

  14. miRNA-205 affects infiltration and metastasis of breast cancer

    SciTech Connect (OSTI)

    Wang, Zhouquan [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China) [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China); Department of Tumor, SenGong Hospital of Shaanxi, Xi’an 710300 (China); Liao, Hehe; Deng, Zhiping; Yang, Po; Du, Ning; Zhanng, Yunfeng [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China)] [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China); Ren, Hong, E-mail: renhongs2000@yahoo.com.cn [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China)] [Department of Chest Surgery, The First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an 710061 (China)

    2013-11-08T23:59:59.000Z

    Highlights: •We detected expression of miR-205 in breast cancer cell lines and tissue samples. •We suggest miR-205 is downregulated in human breast cancer tissues and MCF7 cells. •We suggest the lower expression of miR-205 play a role in breast cancer onset. •These data suggest that miR-205 directly targets HER3 in human breast cancer. -- Abstract: Background: An increasing number of studies have shown that miRNAs are commonly deregulated in human malignancies, but little is known about the function of miRNA-205 (miR-205) in human breast cancer. The present study investigated the influence of miR-205 on breast cancer malignancy. Methods: The expression level of miR-205 in the MCF7 breast cancer cell line was determined by quantitative (q)RT-PCR. We then analyzed the expression of miR-205 in breast cancer and paired non-tumor tissues. Finally, the roles of miR-205 in regulating tumor proliferation, apoptosis, migration, and target gene expression were studied by MTT assay, flow cytometry, qRT-PCR, Western blotting and luciferase assay. Results: miR-205 was downregulated in breast cancer cells or tissues compared with normal breast cell lines or non-tumor tissues. Overexpression of miR-205 reduced the growth and colony-formation capacity of MCF7 cells by inducing apoptosis. Overexpression of miR-205 inhibited MCF7 cell migration and invasiveness. By bioinformation analysis, miR-205 was predicted to bind to the 3? untranslated regions of human epidermal growth factor receptor (HER)3 mRNA, and upregulation of miR-205 reduced HER3 protein expression. Conclusion: miR-205 is a tumor suppressor in human breast cancer by post-transcriptional inhibition of HER3 expression.

  15. 1.Physics Department, Colorado School of Mines, Golden, CO 2. National Renewable Energy Laboratory, Golden, CO 3. United Solar Ovonic, LLC Troy, MI, United States THERMAL ACTIVATION OF DEEP OXYGEN DEFECT FORMATION AND HYDROGEN EFFUSION

    E-Print Network [OSTI]

    was partially supported by a DOE grant through United Solar Ovonics, Inc., under the Solar America Initiative1.Physics Department, Colorado School of Mines, Golden, CO 2. National Renewable Energy Laboratory, Golden, CO 3. United Solar Ovonic, LLC Troy, MI, United States BACKGROUND THERMAL ACTIVATION OF DEEP

  16. miRNAs in brain development

    SciTech Connect (OSTI)

    Petri, Rebecca; Malmevik, Josephine; Fasching, Liana; Åkerblom, Malin; Jakobsson, Johan, E-mail: johan.jakobsson@med.lu.se

    2014-02-01T23:59:59.000Z

    MicroRNAs (miRNAs) are small, non-coding RNAs that negatively regulate gene expression at the post-transcriptional level. In the brain, a large number of miRNAs are expressed and there is a growing body of evidence demonstrating that miRNAs are essential for brain development and neuronal function. Conditional knockout studies of the core components in the miRNA biogenesis pathway, such as Dicer and DGCR8, have demonstrated a crucial role for miRNAs during the development of the central nervous system. Furthermore, mice deleted for specific miRNAs and miRNA-clusters demonstrate diverse functional roles for different miRNAs during the development of different brain structures. miRNAs have been proposed to regulate cellular functions such as differentiation, proliferation and fate-determination of neural progenitors. In this review we summarise the findings from recent studies that highlight the importance of miRNAs in brain development with a focus on the mouse model. We also discuss the technical limitations of current miRNA studies that still limit our understanding of this family of non-coding RNAs and propose the use of novel and refined technologies that are needed in order to fully determine the impact of specific miRNAs in brain development. - Highlights: • miRNAs are essential for brain development and neuronal function. • KO of Dicer is embryonically lethal. • Conditional Dicer KO results in defective proliferation or increased apoptosis. • KO of individual miRNAs or miRNA families is necessary to determine function.

  17. Bakken Shale Oil Production Trends

    E-Print Network [OSTI]

    Tran, Tan

    2012-07-16T23:59:59.000Z

    to study this Type of behavior because of scattering data, which leads to erroneous interpretation for the analysis. These production Types, especially Types I and II will give a new type curve matches for shale oil wells above or below the bubble point....

  18. MI high power operation and future plans

    SciTech Connect (OSTI)

    Kourbanis, Ioanis; /Fermilab

    2008-09-01T23:59:59.000Z

    Fermilab's Main Injector on acceleration cycles to 120 GeV has been running a mixed mode operation delivering beam to both the antiproton source for pbar production and to the NuMI[1] target for neutrino production since 2005. On January 2008 the slip stacking process used to increase the beam to the pbar target was expanded to include the beam to the NuMI target increasing both the beam intensity and power. The current high power MI operation will be described along with the near future plans.

  19. MiR-145 is downregulated in human ovarian cancer and modulates cell growth and invasion by targeting p70S6K1 and MUC1

    SciTech Connect (OSTI)

    Wu, Huijuan [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China)] [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China); Xiao, ZhengHua [Department of gynecology, Yongchuan Affiliated Hospital of Chongqing Medical University, Chongqing City 404100 (China)] [Department of gynecology, Yongchuan Affiliated Hospital of Chongqing Medical University, Chongqing City 404100 (China); Wang, Ke; Liu, Wenxin [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China)] [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China); Hao, Quan, E-mail: quanhao2002@163.com [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China)] [Department of Gynecological Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060 (China)

    2013-11-29T23:59:59.000Z

    Highlights: •MiR-145 is downregulated in human ovarian cancer. •MiR-145 targets p70S6K1 and MUC1. •p70S6K1 and MUC1 are involved in miR-145 mediated tumor cell growth and cell invasion, respectively. -- Abstract: MicroRNAs (miRNAs) are a family of small non-coding RNA molecules that regulate gene expression at post-transcriptional levels. Previous studies have shown that miR-145 is downregulated in human ovarian cancer; however, the roles of miR-145 in ovarian cancer growth and invasion have not been fully demonstrated. In the present study, Northern blot and qRT-PCR analysis indicate that miR-145 is downregulated in ovarian cancer tissues and cell lines, as well as in serum samples of ovarian cancer, compared to healthy ovarian tissues, cell lines and serum samples. Functional studies suggest that miR-145 overexpression leads to the inhibition of colony formation, cell proliferation, cell growth viability and invasion, and the induction of cell apoptosis. In accordance with the effect of miR-145 on cell growth, miR-145 suppresses tumor growth in vivo. MiR-145 is found to negatively regulate P70S6K1 and MUC1 protein levels by directly targeting their 3?UTRs. Importantly, the overexpression of p70S6K1 and MUC1 can restore the cell colony formation and invasion abilities that are reduced by miR-145, respectively. MiR-145 expression is increased after 5-aza-CdR treatment, and 5-aza-CdR treatment results in the same phenotype as the effect of miR-145 overexpression. Our study suggests that miR-145 modulates ovarian cancer growth and invasion by suppressing p70S6K1 and MUC1, functioning as a tumor suppressor. Moreover, our data imply that miR-145 has potential as a miRNA-based therapeutic target for ovarian cancer.

  20. Addendum to NuMI shielding assessment

    SciTech Connect (OSTI)

    Vaziri, Kamran; /Fermilab

    2007-10-01T23:59:59.000Z

    The original safety assessment and the Safety Envelope for the NuMI beam line corresponds to 400 kW of beam power. The Main Injector is currently capable of and approved for producing 500 kW of beam power2. However, operation of the NuMI beam line at 400 kW of power brings up the possibility of an occasional excursion above 400 kW due to better than usual tuning in one of the machines upstream of the NuMI beam line. An excursion above the DOE approved Safety Envelope will constitute a safety violation. The purpose of this addendum is to evaluate the radiological issues and modifications required to operate the NuMI beam line at 500 kW. This upgrade will allow 400 kW operations with a reasonable safety margin. Configuration of the NuMI beam line, boundaries, safety system and the methodologies used for the calculations are as described in the original NuMI SAD. While most of the calculations presented in the original shielding assessment were based on Monte Carlo simulations, which were based on the design geometries, most of the results presented in this addendum are based on the measurements conducted by the AD ES&H radiation safety group.

  1. MI Gap Clearing Kicker Magnet Design Review

    SciTech Connect (OSTI)

    Jensen, Chris; /Fermilab

    2008-10-01T23:59:59.000Z

    The kicker system requirements were originally conceived for the NOvA project. NOvA is a neutrino experiment located in Minnesota. To achieve the desired neutrino flux several upgrades are required to the accelerator complex. The Recycler will be used as a proton pre-injector for the Main Injector (MI). As the Recycler is the same size as the MI, it is possible to do a single turn fill ({approx}11 {micro}sec), minimizing the proton injection time in the MI cycle and maximizing the protons on target. The Recycler can then be filled with beam while the MI is ramping to extract beam to the target. To do this requires two new transfer lines. The existing Recycler injection line was designed for 10{pi} pbar beams, not the 20{pi} proton beams we anticipate from the Booster. The existing Recycler extraction line allows for proton injection through the MI, while we want direct injection from the Booster. These two lines will be decommissioned. The new injection line from the MI8 line into the Recycler will start at 848 and end with injection kickers at RR104. The new extraction line in the RR30 straight section will start with a new extraction kicker at RR232 and end with new MI injection kickers at MI308. Finally, to reduce beam loss activation in the enclosure, a new gap clearing kicker will be used to extract uncaptured beam created during the slip stack injection process down the existing dump line. It was suggested that the MI could benefit from this type of system immediately. This led to the early installation of the gap clearing system in the MI, followed by moving the system to Recycler during NOvA. The specifications also changed during this process. Initially the rise and fall time requirements were 38 ns and the field stability was {+-}1%. The 38 ns is based on having a gap of 2 RF buckets between injections. (There are 84 RF buckets that can be filled from the Booster for each injection, but 82 would be filled with beam. MI and Recycler contain 588 RF buckets.) A rough cost/benefit analysis showed that increasing the number of empty buckets to 3 decreased the kicker system cost by {approx}30%. This could be done while not extending the running time since this is only a 1% reduction in protons per pulse, hence the rise and fall time are now 57 ns. Additionally, the {+-}1% tolerance would have required a fast correction kicker while {+-}3% could be achieved without this kicker. The loosened tolerance was based on experience on wide band damping systems in the MI. A higher power wideband damping system is a better use of the resources as it can be used to correct for multiple sources of emittance growth. Finally, with the use of this system for MI instead of Recycler, the required strength grew from 1.2 mrad to 1.7 mrad. The final requirements for this kicker are listed.

  2. Sequence determinants of pri-miRNA processing

    E-Print Network [OSTI]

    Auyeung, Vincent C. (Vincent Churk-man)

    2012-01-01T23:59:59.000Z

    MicroRNAs (miRNAs) are short RNAs that regulate many processes in physiology and pathology by guiding the repression of target messenger RNAs. For classification purposes, miRNAs are defined as ~22 nt RNAs that are produced ...

  3. miR-132 and miR-212 are increased in pancreatic cancer and target the retinoblastoma tumor suppressor

    SciTech Connect (OSTI)

    Park, Jong-Kook [College of Pharmacy, Ohio State University, Columbus, OH 43210 (United States)] [College of Pharmacy, Ohio State University, Columbus, OH 43210 (United States); Henry, Jon C. [Department of Surgery, Ohio State University, Columbus, OH 43210 (United States)] [Department of Surgery, Ohio State University, Columbus, OH 43210 (United States); Jiang, Jinmai [College of Pharmacy, Ohio State University, Columbus, OH 43210 (United States)] [College of Pharmacy, Ohio State University, Columbus, OH 43210 (United States); Esau, Christine [Regulus Therapeutics, Carlsbad, CA (United States)] [Regulus Therapeutics, Carlsbad, CA (United States); Gusev, Yuriy [Lombardi Cancer Center, Georgetown University, Washington, DC (United States)] [Lombardi Cancer Center, Georgetown University, Washington, DC (United States); Lerner, Megan R. [Veterans Affairs Medical Center, Oklahoma City, OK (United States)] [Veterans Affairs Medical Center, Oklahoma City, OK (United States); Postier, Russell G. [Department of Surgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK (United States)] [Department of Surgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK (United States); Brackett, Daniel J. [Veterans Affairs Medical Center, Oklahoma City, OK (United States)] [Veterans Affairs Medical Center, Oklahoma City, OK (United States); Schmittgen, Thomas D., E-mail: Schmittgen.2@osu.edu [College of Pharmacy, Ohio State University, Columbus, OH 43210 (United States)

    2011-03-25T23:59:59.000Z

    Research highlights: {yields} The expression of miR-132 and miR-212 are significantly increased in pancreatic cancer. {yields} miR-132 and miR-212 target the tumor suppressor pRb, resulting in enhanced proliferation. {yields} miR-132 and miR-212 expression is increased by a {beta}2 adrenergic receptor agonist, suggesting a novel mechanism for pancreatic cancer progression. -- Abstract: Numerous microRNAs (miRNAs) are reported as differentially expressed in cancer, however the consequence of miRNA deregulation in cancer is unknown for many miRNAs. We report that two miRNAs located on chromosome 17p13, miR-132 and miR-212, are over-expressed in pancreatic adenocarcinoma (PDAC) tissues. Both miRNAs are predicted to target the retinoblastoma tumor suppressor, Rb1. Validation of this interaction was confirmed by luciferase reporter assay and western blot in a pancreatic cancer cell line transfected with pre-miR-212 and pre-miR-132 oligos. Cell proliferation was enhanced in Panc-1 cells transfected with pre-miR-132/-212 oligos. Conversely, antisense oligos to miR-132/-212 reduced cell proliferation and caused a G{sub 2}/M cell cycle arrest. The mRNA of a number of E2F transcriptional targets were increased in cells over expressing miR-132/-212. Exposing Panc-1 cells to the {beta}2 adrenergic receptor agonist, terbutaline, increased the miR-132 and miR-212 expression by 2- to 4-fold. We report that over-expression of miR-132 and miR-212 result in reduced pRb protein in pancreatic cancer cells and that the increase in cell proliferation from over-expression of these miRNAs is likely due to increased expression of several E2F target genes. The {beta}2 adrenergic pathway may play an important role in this novel mechanism.

  4. Si, Yo Puedo Controlar Mi Diabetes!

    E-Print Network [OSTI]

    ¡Si, Yo Puedo Controlar Mi Diabetes! ¡Si, Yo Puedo Controlar Mí Diabetes! (Si, Yo Puedo/Latinos with diabetes. The curriculum is predicated on the American Diabetes Association's national standards of care and lifestyle skills to better control their diabetes. Relevance · Diabetes costs Texas more than 12 billion

  5. Targeting miR-21 enhances the sensitivity of human colon cancer HT-29 cells to chemoradiotherapy in vitro

    SciTech Connect (OSTI)

    Deng, Jun; Lei, Wan; Fu, Jian-Chun; Zhang, Ling; Li, Jun-He; Xiong, Jian-Ping, E-mail: jpxiong@medmail.com.cn

    2014-01-17T23:59:59.000Z

    Highlight: •MiR-21 plays a significant role in 5-FU resistance. •This role might be attributed to targeting of hMSH2 as well as TP and DPD via miR-21 targeted hMSH2. •Indirectly targeted TP and DPD to influence 5-FU chemotherapy sensitivity. -- Abstract: 5-Fluorouracil (5-FU) is a classic chemotherapeutic drug that has been widely used for colorectal cancer treatment, but colorectal cancer cells are often resistant to primary or acquired 5-FU therapy. Several studies have shown that miR-21 is significantly elevated in colorectal cancer. This suggests that this miRNA might play a role in this resistance. In this study, we investigated this possibility and the possible mechanism underlying this role. We showed that forced expression of miR-21 significantly inhibited apoptosis, enhanced cell proliferation, invasion, and colony formation ability, promoted G1/S cell cycle transition and increased the resistance of tumor cells to 5-FU and X radiation in HT-29 colon cancer cells. Furthermore, knockdown of miR-21 reversed these effects on HT-29 cells and increased the sensitivity of HT-29/5-FU to 5-FU chemotherapy. Finally, we showed that miR-21 targeted the human mutS homolog2 (hMSH2), and indirectly regulated the expression of thymidine phosphorylase (TP) and dihydropyrimidine dehydrogenase (DPD). These results demonstrate that miR-21 may play an important role in the 5-FU resistance of colon cancer cells.

  6. BMPs Regulate the Oft Development via miRNAs

    E-Print Network [OSTI]

    Bai, Yan

    2014-08-04T23:59:59.000Z

    -92 cluster encodes six miRNAs, miR-17, miR-18a, miR-19a, miR-20a, miR19b-1 and miR-92-1. They are known as oncogenes and play roles in the development of heart, lungs and immune system (Koralov et al., 2008; Ventura et al., 2008; Vincentz et al., 2008... previously described (Liu et al., 2004; Ventura et al., 2008; Verzi et al., 2005; Xiao et al., 2008). To generate the Bmp7flox allele, a targeting vector was constructed that introduced one loxP site into upstream of the Bmp7 fourth exon followed by a frt...

  7. Mi GmbH | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant JumpMarysville, Ohio:Menomonee| Open Energy Information TopicsMexicoMi GmbH Jump

  8. ,"Sault St Marie, MI Natural Gas Pipeline Exports to Canada ...

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

    Sault St Marie, MI Natural Gas Pipeline Exports to Canada (Million Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of...

  9. ,"Detroit, MI Natural Gas Pipeline Imports From Canada (MMcf...

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

    Imports From Canada (MMcf)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Detroit, MI...

  10. ,"Marysville, MI Natural Gas Pipeline Imports From Canada (MMcf...

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

    Imports From Canada (MMcf)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Marysville, MI...

  11. Examen de calcul matriciel Licence MASHS -MI -SPC, semestre 2

    E-Print Network [OSTI]

    Lafont, Yves

    Examen de calcul matriciel Licence MASHS - MI - SPC, semestre 2 14 juin 2007 Durée de l'épreuve : 3

  12. Repression of ATR pathway by miR-185 enhances radiation-induced apoptosis and proliferation

    E-Print Network [OSTI]

    Cai, Long

    of miR-34a expression may be responsible for important protective mechanisms counteracting radiationOPEN Repression of ATR pathway by miR-185 enhances radiation-induced apoptosis and proliferation of a human microRNA (miRNA), hsa-miR-185, is downregulated in response to ionizing radiation. Elevation of mi

  13. CID-miRNA: A web server for prediction of novel miRNA precursors in human genome

    SciTech Connect (OSTI)

    Tyagi, Sonika; Vaz, Candida [Centre for Computational Biology and Bioinformatics, School of Information Technology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi 110067 (India); Gupta, Vipin; Bhatia, Rohit [Department of Computer Sciences, Netaji Subhash Institute of Technology, New Delhi (India); Maheshwari, Sachin [Department of Computer Sciences, Indian Institute of Technology, New Delhi (India); Srinivasan, Ashwin [IBM Research Lab, Indian Institute of Technology, New Delhi (India); Bhattacharya, Alok [Centre for Computational Biology and Bioinformatics, School of Information Technology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi 110067 (India); School of Life Sciences, Jawaharlal Nehru University, New Delhi (India)], E-mail: alok.bhattacharya@gmail.com

    2008-08-08T23:59:59.000Z

    microRNAs (miRNA) are a class of non-protein coding functional RNAs that are thought to regulate expression of target genes by direct interaction with mRNAs. miRNAs have been identified through both experimental and computational methods in a variety of eukaryotic organisms. Though these approaches have been partially successful, there is a need to develop more tools for detection of these RNAs as they are also thought to be present in abundance in many genomes. In this report we describe a tool and a web server, named CID-miRNA, for identification of miRNA precursors in a given DNA sequence, utilising secondary structure-based filtering systems and an algorithm based on stochastic context free grammar trained on human miRNAs. CID-miRNA analyses a given sequence using a web interface, for presence of putative miRNA precursors and the generated output lists all the potential regions that can form miRNA-like structures. It can also scan large genomic sequences for the presence of potential miRNA precursors in its stand-alone form. The web server can be accessed at (http://mirna.jnu.ac.in/cidmirna/)

  14. MicroRNA miR-125b causes leukemia

    E-Print Network [OSTI]

    Bousquet, Marina

    MicroRNA miR-125b has been implicated in several kinds of leukemia. The chromosomal translocation t(2;11)(p21;q23) found in patients with myelodysplasia and acute myeloid leukemia leads to an overexpression of miR-125b of ...

  15. TOOL KIT CHECKLIST 12DOM_MI058

    E-Print Network [OSTI]

    Peters, Richard

    TOOL KIT CHECKLIST 12DOM_MI058 TOOLS fOr DIY Considerthetypesofprojectsyouwillbeundertaking,secondhandisfineifthey'reingoodcondition. Anycuttingsurfacesmustberazorsharpandbespecifictothematerialtobecut. Tools--especiallypowertools--canbeverydangerous. "Reality,wastingmoneyandlettingfrustrationandfailuremakeyourprojectsunpleasant (andunsuccessful)andworsestill,putyouoffanymoreDIY. #12;TOOL KIT CHECKLIST 12DOM_MI058 BASIC TOOL KITS MAY INCLUDE

  16. BMC Bioinformatics Prediction of novel miRNAs and associated

    E-Print Network [OSTI]

    Green, Pamela

    . Abstract Background: Small non-coding RNAs (21 to 24 nucleotides) regulate a number of developmental the collection of currently known soybean miRNAs. We developed a bioinformatics pipeline using in-house scripts on regulation patterns between the miRNAs and their predicted target genes expression. We also deposited

  17. ,"St. Clair, MI Natural Gas Pipeline Exports to Canada (MMcf...

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

    Exports to Canada (MMcf)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","St. Clair, MI...

  18. ,"St. Clair, MI Natural Gas Pipeline Imports From Canada (MMcf...

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

    Imports From Canada (MMcf)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","St. Clair, MI...

  19. STEVE SHEPHERD Bakken Workforce Development Panel

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

    are primarily low income, isolated and have experienced persistent and historical poverty and chronic unemployment. Unemployment rates on these reservations are much higher...

  20. miR-143 Interferes with ERK5 Signaling, and Abrogates Prostate Cancer Progression in Mice

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    miR-143 Interferes with ERK5 Signaling, and Abrogates Prostate Cancer Progression in Mice Cyrielle-regulated kinase-5 (ERK5) activity. We show here that ERK5 is a miR-143 target in prostate cancer. Conclusions: mi, Apparailly F, Fernandez PL, et al. (2009) miR-143 Interferes with ERK5 Signaling, and Abrogates Prostate

  1. Regulation of Synaptic Structure and Function by FMRP-Associated MicroRNAs miR-125b and miR-132

    E-Print Network [OSTI]

    Edbauer, Dieter

    MicroRNAs (miRNAs) are noncoding RNAs that suppress translation of specific mRNAs. The miRNA machinery interacts with fragile X mental retardation protein (FMRP), which functions as translational repressor. We show that ...

  2. MicroRNAs in early embryonic development : dissecting the role of miR-290 through miR-295 in the mouse

    E-Print Network [OSTI]

    Dennis, Lucas M

    2008-01-01T23:59:59.000Z

    MicroRNAs mediate developmental regulation of gene expression via translational repression of target mRNAs. Targeted deletion of the miRNA biogenesis machinery in the mouse has demonstrated essential roles for miRNAs during ...

  3. Repression of miR-17-5p with elevated expression of E2F-1 and c-MYC in non-metastatic hepatocellular carcinoma and enhancement of cell growth upon reversing this expression pattern

    SciTech Connect (OSTI)

    El Tayebi, H.M.; Omar, K.; Hegy, S.; El Maghrabi, M.; El Brolosy, M. [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt)] [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt); Hosny, K.A. [Department of General Surgery, Faculty of Medicine, Cairo University, Cairo (Egypt)] [Department of General Surgery, Faculty of Medicine, Cairo University, Cairo (Egypt); Esmat, G. [Department of Endemic Medicine and Hepatology, Cairo University, Cairo (Egypt)] [Department of Endemic Medicine and Hepatology, Cairo University, Cairo (Egypt); Abdelaziz, A.I., E-mail: ahmed.abdel-aziz@guc.edu.eg [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt)

    2013-05-10T23:59:59.000Z

    Highlights: •The oncogenic miR-17-5p is downregulated in non-metastatic hepatocellular carcinoma patients. •E2F-1 and c-MYC transcripts are upregulated in non-metastatic HCC patients. •miR-17-5p forced overexpression inhibited E2F-1 and c-MYC expression in HuH-7 cells. •miR-17-5p mimicking increased HuH-7 cell growth, proliferation, migration and colony formation. •miR-17-5p is responsible for HCC progression among the c-MYC/E2F-1/miR-17-5p triad members. -- Abstract: E2F-1, c-MYC, and miR-17-5p is a triad of two regulatory loops: a negative and a positive loop, where c-MYC induces the expression of E2F-1 that induces the expression of miR-17-5p which in turn reverses the expression of E2F-1 to close the loop. In this study, we investigated this triad for the first time in hepatocellular carcinoma (HCC), where miR-17-5p showed a significant down-regulation in 23 non-metastatic HCC biopsies compared to 10 healthy tissues; however, E2F-1 and c-MYC transcripts were markedly elevated. Forced over-expression of miR-17-5p in HuH-7 cells resulted in enhanced cell proliferation, growth, migration and clonogenicity with concomitant inhibition of E2F-1 and c-MYC transcripts expressions, while antagomirs of miR-17-5p reversed these events. In conclusion, this study revealed a unique pattern of expression for miR-17-5p in non-metastatic HCC patients in contrast to metastatic HCC patients. In addition we show that miR-17-5p is the key player among the triad that tumor growth and spread.

  4. Validation of MCNPX-PoliMi Fission Models

    SciTech Connect (OSTI)

    S. A. Pozzi; S. D. Clarke; W. Walsh; E. C. Miller; J. Dolan; M. Flaska; B. M. Wieger; A. Enqvist; E. Padovani; J. K. Mattingly; D. L. Chichester; P. Peerani

    2012-10-01T23:59:59.000Z

    We present new results on the measurement of correlated, outgoing neutrons from spontaneous fission events in a Cf-252 source. 16 EJ-309 liquid scintillation detectors are used to measure neutron-neutron correlations for various detector angles. Anisotropy in neutron emission is observed. The results are compared to MCNPX-PoliMi simulations and good agreement is observed.

  5. MCNPX-PoliMi for Nuclear Nonproliferation Applications

    SciTech Connect (OSTI)

    S. A. Pozzi; S. D. Clarke; W. Walsh; E. C. Miller; J. Dolan; M. Flaska; B. M. Wieger; A. Enqvist; E. Padovani; J. K. Mattingly; D. L. Chichester; P. Peerani

    2012-12-01T23:59:59.000Z

    In the past few years, efforts to develop new measurement systems to support nuclear nonproliferation and homeland security have increased substantially. Monte Carlo radiation transport is one of the simulation methods of choice for the analysis of data from existing systems and for the design of new measurement systems; it allows for accurate description of geometries, detailed modeling of particle-nucleus interactions, and event-by-event detection analysis. This paper describes the use of the Monte Carlo code MCNPX-PoliMi for nuclear-nonproliferation applications, with particular emphasis on the simulation of spontaneous and neutron-induced nuclear fission. In fact, of all possible neutron-nucleus interactions, neutron-induced fission is the most defining characteristic of special nuclear material (such as U-235 and Pu-239), which is the material of interest in nuclear-nonproliferation applications. The MCNP-PoliMi code was originally released from the Radiation Safety Shielding Center (RSSIC) at Oak Ridge National Laboratory in 2003 [1]; the MCNPX-PoliMi code contains many enhancements and is based on MCNPX ver. 2.7.0. MCNPX-PoliMi ver. 2.0 was released through RSICC in 2012 as a patch to MCNPX ver. 2.7.0 and as an executable [2].

  6. Supramolecular Chemistry@PoliMI: Where Nano meets Biology

    E-Print Network [OSTI]

    Supramolecular Chemistry@PoliMI: Where Nano meets Biology 28-29 June, 2012 Aula De Donato Piazza:30-12:15 Jonathan W. Steed, Durhan University, United Kingdom Responsive Supramolecular gels 12:15-12:45 Alberto-assembly for Biomedical Applications 14:45-15:15 Markus Linder, VTT-Technical Research Centre of Finland Materials by self

  7. Event Rates for Off Axis NuMI Experiments

    E-Print Network [OSTI]

    B. Viren

    2006-08-25T23:59:59.000Z

    Neutrino interaction rates for experiments placed off axis in the NuMI beam are calculated. Primary proton beam energy is 120 GeV and four locations at 810 km from target and 6, 12, 30 and 40 km off axis are considered. This report is part of the Joint FNAL/BNL Future Long Baseline Neutrino Oscillation Experiment Study.

  8. Yo, yo misma y mi musa1 (mara castrejn)

    E-Print Network [OSTI]

    Boyer, Edmond

    siempre que mantengan una distancia prudente de seguridad, pero cuando yo escribo la musa soy yo misma y todo el trabajo «sucio» y eso te convierte en actante, y a mí en lactante. 1. Mi infancia hal-00747889

  9. May 2 6, 2011 University of Michigan, Ann Arbor, MI

    E-Print Network [OSTI]

    Temple, Blake

    May 2 ­ 6, 2011 University of Michigan, Ann Arbor, MI Young Researchers and Grad Students of Michigan, Chair, Craig Evans ­ Univ of California, Berkeley, Tai-Ping Liu ­ Stanford, Craig Tracy ­ Univ, Institute of Mathematics and its Applications-University of Minnesota, Department of Mathematics-University

  10. Agent Program Planning Information S! Yo Puedo Controlar Mi Diabetes!

    E-Print Network [OSTI]

    Agent Program Planning Information Sí! ¡Yo Puedo Controlar Mi Diabetes! (A culturally appropriate type 2 diabetes self-management program for Hispanic/Latino, Spanish-speaking audiences) Relevance · Estimates from the Texas Health and Human Services Commission indicate that in 2011 diabetes cost Texas more

  11. Discovery of miRNA-regulated processes in mammalian development

    E-Print Network [OSTI]

    Young, Amanda Garfinkel

    2010-01-01T23:59:59.000Z

    The genomes of plants and animals encode hundreds of non-coding ~22nt RNAs termed "microRNAs" (miRNAs). These RNAs guide the sequence-specific inhibition of translation and destabilization of mRNA targets through short ...

  12. The action of ARGONAUTE1 in the miRNA pathway and its

    E-Print Network [OSTI]

    Bartel, David

    The action of ARGONAUTE1 in the miRNA pathway and its regulation by the miRNA pathway are crucial, France; 2 Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA; 3 Laboratoire, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA MicroRNAs (miRNAs) are endogenous 21

  13. MI 625 -Processos Estocasticos Nancy Lopes Garcia, Sala 209 -IMECC

    E-Print Network [OSTI]

    Lopes Garcia, Nancy

    MI 625 - Processos Estoc´asticos Nancy Lopes Garcia, Sala 209 - IMECC nancy@ime.unicamp.br, www´etrica para Processos de Poisson · MCMC e simula¸c~ao perfeita 1 #12;Processos Estoc´asticos Infer^encia: Seja´es de um Modelo Log´istico Regressivo, cujas vari´aveis regressoras dependem do tempo anterior, por

  14. Groundwater protection for the NuMI project

    SciTech Connect (OSTI)

    Wehmann, A.; Smart, W.; Menary, S.; Hylen, J.; Childress, S.

    1997-10-01T23:59:59.000Z

    The physics requirements for the long base line neutrino oscillation experiment MINOS dictate that the NuMI beamline be located in the aquifer at Fermilab. A methodology is described for calculating the level of radioactivation of groundwater caused by operation of this beamline. A conceptual shielding design for the 750 meter long decay pipe is investigated which would reduce radioactivation of the groundwater to below government standards. More economical shielding designs to meet these requirements are being explored. Also, information on local geology, hydrogeology, government standards, and a glossary have been included.

  15. MHK Technologies/Mi2 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend < MHK ProjectsFlagship <HelixKESCClick hereMi2 < MHK

  16. Journal of Sedimentary Research, 2014, v. 84, 837838 DOI: http://dx.doi.org/10.2110/jsr.2014.73

    E-Print Network [OSTI]

    Polly, David

    of bitumen (this is, after all, an oil-producing shale) while the slide is cured on a hot plate, can also­LOWER MISSISSIPPIAN UPPER SHALE MEMBER OF THE BAKKEN FORMATION, WILLISTON BASIN, NORTH DAKOTA, U made on cores of the Bakken Shale and presents a methodology to examine and describe these cores

  17. U.S. Department of the Interior U.S. Geological Survey

    E-Print Network [OSTI]

    Torgersen, Christian

    -based assessment of conventional and continuous oil and gas resources of the Devonian Three Forks Formation fracturing, which stimulates movement of hydrocarbons in tight-oil reservoirs. Approximately 450 million bar Basin Province boundary Bakken TPS Middle Bakken Conventional AU Nesson-Little Knife Continuous Oil AU

  18. 2012 NIST Precision Measurement Grants Georg Raithel, University of Michigan, Ann Arbor, MI

    E-Print Network [OSTI]

    Magee, Joseph W.

    2012 NIST Precision Measurement Grants Georg Raithel, University of Michigan, Ann Arbor, MI to the transition frequencies. Thomas Stace, University of Queensland, Brisbane, Queensland, Australia Thermometry

  19. Global identification of miRNAs and targets in Populus euphratica under salt stress

    E-Print Network [OSTI]

    Deng, Xing-Wang

    Global identification of miRNAs and targets in Populus euphratica under salt stress Bosheng Li, a typical hydro-halophyte, is ideal for studying salt stress responses in woody plants. MicroRNAs (miRNA may regulate tolerance to salt stress but this has not been widely studied in P. euphratica

  20. MONITORING AND HABITAT ANALYSIS FOR WOLVES IN UPPER MARCEL J. POTVIN,1 School of Forest Resources and Environmental Science Michigan Technological University, Houghton, MI

    E-Print Network [OSTI]

    Resources and Environmental Science Michigan Technological University, Houghton, MI 49931, USA THOMAS D. DRUMMER, Department of Mathematical Sciences, Michigan Technological University, Houghton, MI 49931, USA University, Houghton, MI 49931, USA DEAN E. BEYER, JR., Michigan Department of Natural Resources, Marquette

  1. 2005 Borchardt Conference: A Seminar on Advances in Water and Wastewater Treatment February 23-25, Ann Arbor, MI

    E-Print Network [OSTI]

    Nerenberg, Robert

    -25, Ann Arbor, MI Conference Proceedings 1 Membrane Biofilm Reactors for Water and Wastewater Treatment and Wastewater Treatment February 23-25, Ann Arbor, MI Conference Proceedings 2 (sparging) to replenish oxygen: A Seminar on Advances in Water and Wastewater Treatment February 23-25, Ann Arbor, MI Conference Proceedings

  2. Solar Flare Measurements with STIX and MiSolFA

    E-Print Network [OSTI]

    Casadei, Diego

    2014-01-01T23:59:59.000Z

    Solar flares are the most powerful events in the solar system and the brightest sources of X-rays, often associated with emission of particles reaching the Earth and causing geomagnetic storms, giving problems to communication, airplanes and even black-outs. X-rays emitted by accelerated electrons are the most direct probe of solar flare phenomena. The Micro Solar-Flare Apparatus (MiSolFA) is a proposed compact X-ray detector which will address the two biggest issues in solar flare modeling. Dynamic range limitations prevent simultaneous spectroscopy with a single instrument of all X-ray emitting regions of a flare. In addition, most X-ray observations so far are inconsistent with the high anisotropy predicted by the models usually adopted for solar flares. Operated at the same time as the STIX instrument of the ESA Solar Orbiter mission, at the next solar maximum (2020), they will have the unique opportunity to look at the same flare from two different directions: Solar Orbiter gets very close to the Sun wit...

  3. Modulation of Ago-miRNA regulatory networks by cis-sequence elements and target competition

    E-Print Network [OSTI]

    Bosson, Andrew D. (Andrew David)

    2014-01-01T23:59:59.000Z

    regulators of gene expression in a wide range of organisms and biological processes. Each miRNA guides Argonaute (Ago) protein complexes to target and repress hundreds of genes in a sequence-dependent manner. To identify ...

  4. Direct miRNA-hybridization assays and their potential in diagnostics

    E-Print Network [OSTI]

    Krylov, Sergey

    Direct miRNA-hybridization assays and their potential in diagnostics David W. Wegman, Sergey N. Wegman, Sergey N. Krylov* Centre for Research on Biomolecular Interactions, York University, Toronto

  5. Posttranscriptional Regulation of BK Channel Splice Variant Stability by miR-9

    E-Print Network [OSTI]

    Siegelmann , Hava T

    Neuron Article Posttranscriptional Regulation of BK Channel Splice Variant Stability by miR-9Department of Psychiatry, Brudnick Neuropsychiatric Research Institute, University of Massachusetts Medical Systems Laboratory, Computer Science Department, University of Massachusetts, 140 Governors Drive, Amherst

  6. Modern Instrumentation, 2013, 2, 7-15 doi:10.4236/mi.2013.21002 Published Online January 2013 (http://www.scirp.org/journal/mi)

    E-Print Network [OSTI]

    Adler, Andy

    ://www.scirp.org/journal/mi) Toward a Test Protocol for Conducted Energy Weapons Andy Adler1 , David Dawson1 , Robert Evans2 , Laurin and Computer Engineering, Ottawa, Canada 2 Datrend Systems Inc., Vancouver, Canada 3 Vernac Ltd., Ottawa, Canada 4 MPB Technologies, Montreal, Canada Email: adler@sce.carleton.ca Received November 4, 2012

  7. miR-196a targets netrin 4 and regulates cell proliferation and migration of cervical cancer cells

    SciTech Connect (OSTI)

    Zhang, Jie [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China)] [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China); Zheng, Fangxia [Department of Radiotherapy, Liaocheng People’s Hospital, Liaocheng 252000 (China)] [Department of Radiotherapy, Liaocheng People’s Hospital, Liaocheng 252000 (China); Yu, Gang [Department for Disease Control, Tumor Hospital of Liaocheng, Liaocheng 252000 (China)] [Department for Disease Control, Tumor Hospital of Liaocheng, Liaocheng 252000 (China); Yin, Yanhua, E-mail: yinyanhuablk@163.com [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China)] [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China); Lu, Qingyang [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China)] [Department of Pathology, Liaocheng People’s Hospital, Liaocheng 252000 (China)

    2013-11-01T23:59:59.000Z

    Highlights: •miR-196a was overexpressed in cervical cancer tissue compared to normal tissue. •miR-196a expression elevated proliferation and migration of cervical cancer cells. •miR-196a inhibited NTN4 expression by binding 3?-UTR region of NTN4 mRNA. •NTN4 inversely correlated with miR-196a expression in cervical tissue and cell line. •NTN4 expression was low in cervical cancer tissue compared to normal tissue. -- Abstract: Recent research has uncovered tumor-suppressive and oncogenic potential of miR-196a in various tumors. However, the expression and mechanism of its function in cervical cancer remains unclear. In this study, we assess relative expression of miR-196a in cervical premalignant lesions, cervical cancer tissues, and four cancer cell lines using quantitative real-time PCR. CaSki and HeLa cells were treated with miR-196a inhibitors, mimics, or pCDNA/miR-196a to investigate the role of miR-196a in cancer cell proliferation and migration. We demonstrated that miR-196a was overexpressed in cervical intraepithelial neoplasia 2–3 and cervical cancer tissue. Moreover, its expression contributes to the proliferation and migration of cervical cancer cells, whereas inhibiting its expression led to a reduction in proliferation and migration. Five candidate targets of miR-196a chosen by computational prediction and Cervical Cancer Gene Database search were measured for their mRNA in both miR-196a-overexpressing and -depleted cancer cells. Only netrin 4 (NTN4) expression displayed an inverse association with miR-196a. Fluorescent reporter assays revealed that miR-196a inhibited NTN4 expression by targeting one binding site in the 3?-untranslated region (3?-UTR) of NTN4 mRNA. Furthermore, qPCR and Western blot assays verified NTN4 expression was downregulated in cervical cancer tissues compared to normal controls, and in vivo mRNA level of NTN4 inversely correlated with miR-196a expression. In summary, our findings provide new insights about the functional role of miR-196a in cervical carcinogenesis and suggested a potential use of miR-196a for clinical diagnosis and as a therapeutic target.

  8. Quadrennial Energy Review Public Meeting #9 Bakken Workforce...

    Office of Environmental Management (EM)

    to fill the pipeline in support industries affected by the boom. From welding to our health care programs, our students are getting trained here, and being employed in the...

  9. 05643_GeoMech_Bakken | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032) - Energy Innovation Portal Advanced Materialsj3 from2David

  10. New Models Help Optimize Development of Bakken Shale Resources | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337, 2011R - 445 CU

  11. New Models Help Optimize Development of Bakken Shale Resources | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many DevilsForumEngines | Department of EnergySensitive Speciesof

  12. Mi2b Is Required for c-Globin Gene Silencing: Temporal Assembly of a GATA-1-FOG-1-Mi2 Repressor Complex in b-YAC Transgenic Mice

    E-Print Network [OSTI]

    Costa, Flavia C.; Fedosyuk, Halyna; Chazelle, Allen M.; Neades, Renee Y.; Peterson, Kenneth R.

    2012-12-20T23:59:59.000Z

    - globin expression during adult definitive erythropoiesis. Results Expression of c-globin in Mi2b conditional knockout b- YAC mice The NuRD complex is composed of the ATPase Mi2, MTA-1, MTA-2, p66, RbAp46 (RBBP7), RbAp48 (RBBP4), MBD3 and the histone... (Figure 2N), although the Mi2b conditional knockout mice showed fewer strong HbF-positive cells. Mature RBCs are enucleated, making it difficult to demonstrate that the nuclear-localized Mi2b protein is reduced in these cells. To further demonstrate...

  13. CX-005588: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Investigation of Improved Conductivity and Proppant Applications in the Bakken FormationCX(s) Applied: B3.6Date: 04/11/2011Location(s): Grand Forks, North DakotaOffice(s): Fossil Energy, National Energy Technology Laboratory

  14. Production Forecast, Analysis and Simulation of Eagle Ford Shale Oil 

    E-Print Network [OSTI]

    Alotaibi, Basel Z S Z J

    2014-12-02T23:59:59.000Z

    fracturing to liberate the recoverable hydrocarbon reserves. Thousands of wells that have been drilled in the major oil shale formations: Bakken, Permian Basin and Eagle Ford, where oil production peaked in the first few weeks and then showed a sharp...

  15. Center for transportation studies The NewAmerican

    E-Print Network [OSTI]

    Minnesota, University of

    fracturing, or fracking, techniques have transformed shale deposits from marginal sources of hydrocarbon fuel fracking really took off, the Bakken formation has become one of the most active shale oil fields

  16. Using Decline Curve Analysis, Volumetric Analysis, and Bayesian Methodology to Quantify Uncertainty in Shale Gas Reserve Estimates

    E-Print Network [OSTI]

    Gonzalez Jimenez, Raul 1988-

    2012-11-30T23:59:59.000Z

    . [ ( ) ] .................................................................................. (4) In Eq. (4), ? is a dimensionless exponent parameter and ? is the characteristic time parameter, months. Can and Kabir (2012) analyzed production data from 820 wells from three different shale formations (220 wells in the Bakken oil shale...

  17. Production Forecast, Analysis and Simulation of Eagle Ford Shale Oil

    E-Print Network [OSTI]

    Alotaibi, Basel Z S Z J

    2014-12-02T23:59:59.000Z

    fracturing to liberate the recoverable hydrocarbon reserves. Thousands of wells that have been drilled in the major oil shale formations: Bakken, Permian Basin and Eagle Ford, where oil production peaked in the first few weeks and then showed a sharp...

  18. miR-421 induces cell proliferation and apoptosis resistance in human nasopharyngeal carcinoma via downregulation of FOXO4

    SciTech Connect (OSTI)

    Chen, Liang [Neurosurgery Institute, Key Laboratory on Brain Function Repair and Regeneration of Guangdong, Zhujiang Hospital of Southern Medical University, Guangzhou 510282 (China) [Neurosurgery Institute, Key Laboratory on Brain Function Repair and Regeneration of Guangdong, Zhujiang Hospital of Southern Medical University, Guangzhou 510282 (China); Department of Otolaryngology, Guangzhou General Hospital of PLA Guangzhou Command, Guangzhou 510010 (China); Tang, Yanping [Neurosurgery Institute, Key Laboratory on Brain Function Repair and Regeneration of Guangdong, Zhujiang Hospital of Southern Medical University, Guangzhou 510282 (China)] [Neurosurgery Institute, Key Laboratory on Brain Function Repair and Regeneration of Guangdong, Zhujiang Hospital of Southern Medical University, Guangzhou 510282 (China); Wang, Jian [Department of Otolaryngology, Guangzhou General Hospital of PLA Guangzhou Command, Guangzhou 510010 (China)] [Department of Otolaryngology, Guangzhou General Hospital of PLA Guangzhou Command, Guangzhou 510010 (China); Yan, Zhongjie [Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA,The Bayi Clinical Medical Institute of Southern Medical University, Beijing 100700 (China)] [Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA,The Bayi Clinical Medical Institute of Southern Medical University, Beijing 100700 (China); Xu, Ruxiang, E-mail: RuxiangXu@yahoo.com [Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA,The Bayi Clinical Medical Institute of Southern Medical University, Beijing 100700 (China)] [Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA,The Bayi Clinical Medical Institute of Southern Medical University, Beijing 100700 (China)

    2013-06-14T23:59:59.000Z

    Highlights: •miR-421 is upregulated in nasopharyngeal carcinoma. •miR-421 induces cell proliferation and apoptosis resistance. •FOXO4 is a direct and functional target of miR-421. -- Abstract: microRNAs have been demonstrated to play important roles in cancer development and progression. Hence, identifying functional microRNAs and better understanding of the underlying molecular mechanisms would provide new clues for the development of targeted cancer therapies. Herein, we reported that a microRNA, miR-421 played an oncogenic role in nasopharyngeal carcinoma. Upregulation of miR-421 induced, whereas inhibition of miR-421 repressed cell proliferation and apoptosis resistance. Furthermore, we found that upregulation of miR-421 inhibited forkhead box protein O4 (FOXO4) signaling pathway following downregulation of p21, p27, Bim and FASL expression by directly targeting FOXO4 3?UTR. Additionally, we demonstrated that FOXO4 expression is critical for miR-421-induced cell growth and apoptosis resistance. Taken together, our findings not only suggest that miR-421 promotes nasopharyngeal carcinoma cell proliferation and anti-apoptosis, but also uncover a novel regulatory mechanism for inactivation of FOXO4 in nasopharyngeal carcinoma.

  19. Single-molecule modeling of mRNA degradation by miRNA: Lessons from data

    E-Print Network [OSTI]

    Celine Sin; Davide Chiarugi; Angelo Valleriani

    2014-10-20T23:59:59.000Z

    Recent experimental results on the effect of miRNA on the decay of its target mRNA have been analyzed against a previously hypothesized single molecule degradation pathway. According to that hypothesis, the silencing complex (miRISC) first interacts with its target mRNA and then recruits the protein complexes associated with NOT1 and PAN3 to trigger deadenylation (and subsequent degradation) of the target mRNA. Our analysis of the experimental decay patterns allowed us to refine the structure of the degradation pathways at the single molecule level. Surprisingly, we found that if the previously hypothesized network was correct, only about 7% of the target mRNA would be regulated by the miRNA mechanism, which is inconsistent with the available knowledge. Based on systematic data analysis, we propose the alternative hypothesis that NOT1 interacts with miRISC before binding to the target mRNA. Moreover, we show that when miRISC binds alone to the target mRNA, the mRNA is degraded more slowly, probably through a deadenylation-independent pathway. The new biochemical pathway we propose both fits the data and paves the way for new experimental work to identify new interactions.

  20. Alternate Thesis & Dissertation Formats Manuscript Format Guidelines

    E-Print Network [OSTI]

    Mayfield, John

    Alternate Thesis & Dissertation Formats Manuscript Format Guidelines In addition to the standard format for dissertation/thesis, the Graduate School allows for the use of an alternative format. The manuscript format refers to the use of articles and/or book chapters to replace the standard dissertation

  1. Introduction The Fiber-Lite MI-150 is a 150 Watt quartz halogen fiber optic illuminator designed for general microscopy

    E-Print Network [OSTI]

    Kleinfeld, David

    Introduction ® The Fiber-Lite MI-150 is a 150 Watt quartz halogen fiber optic illuminator designed for general microscopy use. When used with specialty fiber optic cables the MI-150 illuminator can also Illuminator from the carton and retain the manual and any additional documents. ! Remove the fiber optic cable

  2. Roles of the MicroRNA miR-31 in tumor metastasis and an experimental system for the unbiased discovery of genes relevant for breast cancer metastasis

    E-Print Network [OSTI]

    Valastyan, Scott J. (Scott John)

    2010-01-01T23:59:59.000Z

    In these studies, the microRNA miR-31 was identified as a potent inhibitor of breast cancer metastasis. miR-31 expression levels were inversely associated with the propensity to develop metastatic disease in human breast ...

  3. miR-122 targets NOD2 to decrease intestinal epithelial cell injury in Crohn’s disease

    SciTech Connect (OSTI)

    Chen, Yu; Wang, Chengxiao; Liu, Ying; Tang, Liwei; Zheng, Mingxia [Department of Pediatrics, Jiangwan Hospital of Shanghai, Shanghai 200434 (China)] [Department of Pediatrics, Jiangwan Hospital of Shanghai, Shanghai 200434 (China); Xu, Chundi [Department of Pediatrics, Ruijin affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025 (China)] [Department of Pediatrics, Ruijin affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025 (China); Song, Jian, E-mail: jiansongkxy@126.com [Department of Gastroenterology, Jiangwan Hospital of Shanghai, Shanghai 200434 (China)] [Department of Gastroenterology, Jiangwan Hospital of Shanghai, Shanghai 200434 (China); Meng, Xiaochun [Department of Pediatrics, Jiangwan Hospital of Shanghai, Shanghai 200434 (China)] [Department of Pediatrics, Jiangwan Hospital of Shanghai, Shanghai 200434 (China)

    2013-08-16T23:59:59.000Z

    Highlights: •NOD2 is a target gene of miR-122. •miR-122 inhibits LPS-induced apoptosis by suppressing NOD2 in HT-29 cells. •miR-122 reduces the expression of pro-inflammatory cytokines (TNF-? and IFN-?). •miR-122 promotes the release of anti-inflammatory cytokines (IL-4 and IL-10). •NF-?B signaling pathway is involved in inflammatory response induced by LPS. -- Abstract: Crohn’s disease (CD) is one of the two major types of inflammatory bowel disease (IBD) thought to be caused by genetic and environmental factors. Recently, miR-122 was found to be deregulated in association with CD progression. However, the underlying molecular mechanisms remain unclear. In the present study, the gene nucleotide-binding oligomerization domain 2 (NOD2/CARD15), which is strongly associated with susceptibility to CD, was identified as a functional target of miR-122. MiR-122 inhibited LPS-induced apoptosis by suppressing NOD2 in HT-29 cells. NOD2 interaction with LPS initiates signal transduction mechanisms resulting in the activation of nuclear factor ?B (NF-?B) and the stimulation of downstream pro-inflammatory events. The activation of NF-?B was inhibited in LPS-stimulated HT-29 cells pretreated with miR-122 precursor or NOD2 shRNA. The expression of the pro-inflammatory cytokines TNF-? and IFN-? was significantly decreased, whereas therelease of the anti-inflammatory cytokines IL-4 and IL-10 was increased in LPS-stimulated HT-29 cells pretreated with miR-122 precursor, NOD2 shRNA or the NF-?B inhibitor QNZ. Taken together, these results indicate that miR-122 and its target gene NOD2 may play an important role in the injury of intestinal epithelial cells induced by LPS.

  4. Organic scintillation detector response simulation using non-analog MCNPX-PoliMi

    SciTech Connect (OSTI)

    Prasad, S.; Clarke, S. D.; Pozzi, S. A.; Larsen, E. W. [Univ. of Michigan, 2355 Bonisteel Blvd., Ann Arbor, MI 48109 (United States)

    2012-07-01T23:59:59.000Z

    Organic liquid scintillation detectors are valuable for the detection of special nuclear material since they are capable of detecting both neutrons and gamma rays. Scintillators can also provide energy information which is helpful in identification and characterization of the source. In order to design scintillation based measurement systems appropriate simulation tools are needed. MCNPX-PoliMi is capable of simulating scintillation detector response; however, simulations have traditionally been run in analog mode which leads to long computation times. In this paper, non-analog MCNPX-PoliMi mode which uses variance reduction techniques is applied and tested. The non-analog MCNPX-PoliMi simulation test cases use source biasing, geometry splitting and a combination of both variance reduction techniques to efficiently simulate pulse height distribution and then time-of-flight for a heavily shielded case with a {sup 252}Cf source. An improvement factor (I), is calculated for distributions in each of the three cases above to analyze the effectiveness of the non-analog MCNPX-PoliMi simulations in reducing computation time. It is found that of the three cases, the last case which uses a combination of source biasing and geometry splitting shows the most improvement in simulation run time for the same desired variance. For pulse height distributions speedup ranging from a factor 5 to 25 is observed, while for time-of-flights the speedup factors range from 3 to 10. (authors)

  5. The NuMI proton beam at Fermilab successes and challenges

    SciTech Connect (OSTI)

    Childress, S.; /Fermilab

    2008-11-01T23:59:59.000Z

    The NuMI beam at Fermilab has delivered over 5 x 10{sup 20} 120 GeV protons to the neutrino production target since the start for MINOS [1] neutrino oscillation experiment operation in 2005. We report on proton beam commissioning and operation status, including successes and challenges with this beam.

  6. Signatures of Purifying and Local Positive Selection in Human miRNAs

    E-Print Network [OSTI]

    Kidd, Kenneth

    populations adapt to specific environments. These findings will fuel future investigations exploring how, the expression of the respective protein-coding genes. Production of animal miRNAs is a two-step process where implicated in cell growth, tissue differenti- ation, cell proliferation, embryonic development, insulin

  7. L.van BEETHOVEN : Quatuor n10 en Mi bmol majeur, Op.74 Poco Adagio -Allegro -

    E-Print Network [OSTI]

    Mazliak, Laurent

    L.van BEETHOVEN : Quatuor n°10 en Mi bémol majeur, Op.74 Poco Adagio - Allegro - Adagio ma non con variazioni- Allegro Après le coup de tonnerre que représentait l'achèvement des trois quatuors à apportent une tension qui se fond dans un grand crescendo menant à l'Allegro. Trois accords joyeux pour un

  8. MI-HYUN PARK, PhD Dept. of Civil and Environmental Engineering

    E-Print Network [OSTI]

    Mountziaris, T. J.

    and sustainability Stormwater runoff modeling and management Environmental informatics Decision support systems Areas Land use/climate change and human impact on water quality Urban watershed management of Best Management Practices for Urban Stormwater Management, Water Environment Research, in revision Mi

  9. 2000 JAPAN-USA Symposium on Flexible Automation July 23-26, 2000, Ann Arbor, MI

    E-Print Network [OSTI]

    Saitou, Kazuhiro "Kazu"

    2000 JAPAN-USA Symposium on Flexible Automation July 23-26, 2000, Ann Arbor, MI 2000JUSFA-US1 OFF-LINE ERROR RECOVERY LOGIC SYNTHESIS IN AUTOMATED ASSEMBLY LINES BY USING GENETIC PROGRAMMING Cem M. Baydar by the experts or automated error recovery logic controllers embedded in the system. The previous work

  10. New Loops! MiTeGen* 50MicroMountsTM consist of a thin microfabricated

    E-Print Network [OSTI]

    Meagher, Mary

    New Loops! MiTeGen* 50µMicroMountsTM consist of a thin microfabricated polyimide film attached to a solid non-magnetic stainless steel pin. The film is polyimide, which is used in Kapton® tape and is employed for X- ray transparent windows on X-ray beam lines. The film is curved by wrapping polyimide film

  11. Academic Staff ESS Coversheet Candidate Name (Last, First, M.I.) Banner ID

    E-Print Network [OSTI]

    VandeVord, Pamela

    rev. 6/14 Academic Staff ESS Coversheet Candidate Name (Last, First, M.I.) Banner ID Primary School Initial WSU appointment date Length of ESS-track service (in years & months) Academic Services Officer Archivist Initial WSU rank Dates off ESS-track/Reason Extens Prgm Coordinator Financial Aid Officer Date

  12. We investigated the effects of deforestation on mi-croclimates and sporogonic development of Plasmodium

    E-Print Network [OSTI]

    Obbard, Darren

    We investigated the effects of deforestation on mi- croclimates and sporogonic development membrane feeders. Fed mosquitoes were placed in houses in forested and deforest- ed areas in a highland area (1,500 m above sea level) and monitored for parasite development. Deforested sites had higher

  13. MI FARM TO SCHOOL GRANTEES 2014-2015 PROGRAM YEAR AND PREVIOUS GRANTEES

    E-Print Network [OSTI]

    MI FARM TO SCHOOL GRANTEES 2014-2015 PROGRAM YEAR AND PREVIOUS GRANTEES FOODSYSTEMS.MSU.EDU 2014-2015 GRANTEES School/ district/ program County Current Grant Years as a grantee A&W Daycare Wayne Planning 1 TO SCHOOL GRANTEES (2011/12 ­ 2013/14) School/ district/ program County Grant Type(s) Grant Years All Aboard

  14. MiTV: Multiple-Implementation Testing of User-Input Validators for Web Applications

    E-Print Network [OSTI]

    Xie, Tao

    MiTV: Multiple-Implementation Testing of User-Input Validators for Web Applications Kunal Taneja1 Nuo Li1 Madhuri R. Marri1 Tao Xie1 Nikolai Tillmann2 1 Department of Computer Science, North Carolina,txie}@ncsu.edu, 2nikolait@microsoft.com ABSTRACT User-input validators play an essential role in guarding a web

  15. BNL/SNS TECHNICAL NOTE R. Witkover, D. Gassner, C. Mi

    E-Print Network [OSTI]

    BNL/SNS TECHNICAL NOTE NO. 118 R. Witkover, D. Gassner, C. Mi BNL, Upton, NY 11973, USA October 31, 2002 The SNS BLM System is designed to measure beam losses from a maximum 1% local loss down to a 1 W/m operating loss tolerance. In fact, resolution of 1 % of the 1 W/m threshold has been requested. This amounts

  16. AUSTRALIAN. N~TIONAL UNIVE~SITY DEPARTMENTO:miNUCLEAR PFf-y'SICS

    E-Print Network [OSTI]

    Chen, Ying

    AUSTRALIAN. N~TIONAL UNIVE~SITY DEPARTMENTO:miNUCLEAR PFf-y'SICS 14UD TANK OPENING REPORT/iNo. 51 functions for which it provides power. An order was . immediately placed with N.E.C. for 28 perspex bars microamp hours of b.d.p. generation than its predicted lifetime. In preparation for the next opening

  17. PIANO DI RIQUALIFICAZIONE AMBIENTALE E PAESAGGISTICA DEL TERMOVALORIZZATORE DI DESIO TERMOVALORIZZATORE DI DESIO (MI) BRIANZA ENERGIA E AMBIENTE SPA

    E-Print Network [OSTI]

    Columbia University

    TERMOVALORIZZATORE DI DESIO (MI) ­ BRIANZA ENERGIA E AMBIENTE SPA Impianto di costruito negli anni '70 per lo. · Energia elettrica prodotta: 13.000.000 KWh/anno. LAND S.r.l. Landscape Architecture Nature Development

  18. Measurement of Pi-K Ratios from the NuMI Target

    SciTech Connect (OSTI)

    Seun, Sin Man; /Harvard U.

    2007-07-01T23:59:59.000Z

    Interactions of protons (p) with the NuMI (Neutrinos at the Main Injector) target are used to create the neutrino beam for the MINOS (Main Injector Neutrino Oscillation Search) Experiment. Using the MIPP (Main Injector Particle Production) experimental apparatus, the production of charged pions and kaons in p+NuMI interactions is studied. The data come from a sample of 2 x 10{sup 6} events obtained by MIPP using the 120 GeV/c proton beam from the Main Injector at Fermi National Accelerator Laboratory in Illinois, USA. Pions and kaons are identified by measurement in a Ring Imaging Cherenkov detector. Presented are measurements of {pi}{sup -}/{pi}{sup +}, K{sup -}/K{sup +}, {pi}{sup +}/K{sup +} and {pi}{sup -}/K{sup -} production ratios in the momentum range p{sub T} < 2 GeV/c transversely and 20 GeV/c < p{sub z} < 90 GeV/c longitudinally. Also provided are detailed comparisons of the MIPP NuMI data with the MIPP Thin Carbon data, the MIPP Monte Carlo simulation and the current MINOS models in the relevant momentum ranges.

  19. (Non) formation of methanol by direct hydrogenation of formate...

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

    (Non) formation of methanol by direct hydrogenation of formate on copper catalysts. (Non) formation of methanol by direct hydrogenation of formate on copper catalysts. Abstract: We...

  20. First 450-micron dust continuum mapping of the massive star-forming region NGC 3576 with the P-ArTeMiS bolometer camera

    E-Print Network [OSTI]

    P. André; V. Minier; P. Gallais; V. Reveret; J. Le Pennec; L. Rodriguez; O. Boulade; E. Doumayrou; D. Dubreuil; M. Lortholary; J. Martignac; M. Talvard; C. De Breuck; G. Hamon; N. Schneider; S. Bontemps; P. O. Lagage; E. Pantin; H. Roussel; M. Miller; C. R. Purcell; T. Hill; J. Stutzki

    2008-09-23T23:59:59.000Z

    Context: The earliest phases of massive star formation are currently much debated. Aims. In an effort to make progress, we took a census of Class0-like protostellar dense cores in the NGC 3576 region, one of the nearest and most luminous embedded sites of high-mass star formation in the Galaxy. Methods: We used the P-ArTeMiS bolometer camera on the APEX telescope to produce the first 450-micron dust continuum map of the filamentary dense clump associated with NGC 3576. Results: Combining our 450-micron observations with existing data at other wavelengths, we have identified seven massive protostellar sources along the NGC 3576 filament and placed them in the M_env - L_bol evolutionary diagram for protostars. Conclusions: Comparison with theoretical evolutionary tracks suggests that these seven protostellar sources will evolve into massive stars with masses M* ~ 15-50 Msun. Four sources are classified as candidate high-mass Class 0 objects, two sources as massive Class I objects, and one source appears to be at an intermediate stage.

  1. Horn Operational Experience in K2K, MiniBooNE, NuMI and CNGS

    E-Print Network [OSTI]

    Pardons, A

    2008-01-01T23:59:59.000Z

    This paper gives an overview of the operation and experience gained in the running of magnetic horns in conventional neutrino beam lines (K2K, MiniBooNE, NuMI and CNGS) over the last decade. Increasing beam power puts higher demands on horn conductors but even more on their hydraulic and electrical systems, while the horn environment itself becomes more hostile due to radiation. Experience shows that designing horns for remote handling and testing them extensively without beam become prerequisites for successful future neutrino beam lines.

  2. Testing CPT conservation using the NuMI neutrino beam with the MINOS experiment

    SciTech Connect (OSTI)

    Auty, David John; /Sussex U.

    2010-05-01T23:59:59.000Z

    The MINOS experiment was designed to measure neutrino oscillation parameters with muon neutrinos. It achieves this by measuring the neutrino energy spectrum and flavor composition of the man-made NuMI neutrino beam 1km after the beam is formed and again after 735 km. By comparing the two spectra it is possible to measure the oscillation parameters. The NuMI beam is made up of 7.0% {bar {nu}}{sub {mu}}, which can be separated from the {nu}{sub {mu}} because the MINOS detectors are magnetized. This makes it possible to study {bar {nu}}{sub {mu}} oscillations separately from those of muon neutrinos, and thereby test CPT invariance in the neutrino sector by determining the {bar {nu}}{sub {mu}} oscillation parameters and comparing them with those for {nu}{sub {mu}}, although any unknown physics of the antineutrino would appear as a difference in oscillation parameters. Such a test has not been performed with beam {bar {nu}}{sub {mu}} before. It is also possible to produce an almost pure {bar {nu}}{sub {mu}} beam by reversing the current through the magnetic focusing horns of the NuMI beamline, thereby focusing negatively, instead of positively charged particles. This thesis describes the analysis of the 7% {bar {nu}}{sub {mu}} component of the forward horn current NuMI beam. The {bar {nu}}{sub {mu}} of a data sample of 3.2 x 10{sup 20} protons on target analysis found 42 events, compared to a CPT conserving prediction of 58.3{sub -7.6}{sup +7.6}(stat.){sub -3.6}{sup +3.6}(syst.) events. This corresponds to a 1.9 {sigma} deficit, and a best fit value of {Delta}{bar m}{sub 32}{sup 2} = 18 x 10{sup -3} eV{sup 2} and sin{sup 2} 2{bar {theta}}{sub 23} = 0.55. This thesis focuses particularly on the selection of {bar {nu}}{sub {mu}} events, and investigates possible improvements of the selection algorithm. From this a different selector was chosen, which corroborated the findings of the original selector. The thesis also investigates how the systematic errors affect the precision of {Delta}{bar m}{sub 32}{sup 2} and sin{sup 2} 2{bar {theta}}{sub 23}. Furthermore, it describes a study to determine the gains of the PMTs via the single-photoelectron spectrum. The results were used as a crosscheck of the gains determined at higher intensities by an LED-based light-injection system.

  3. AMENDMENT OF SOLICITATION/MODIFICATlON OF CONTRACT MI54 I See Block 16C I

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA Approved: 5-13-14Russianvolunteer | National011-03-2010 1 PAGE 1 PageMI54 I See

  4. Upgrade of the Minos+ Experiment Data Acquisition for the High Energy NuMI Beam Run

    E-Print Network [OSTI]

    Badgett, William; Torretta, Donatella; Meier, Jerry; Gunderson, Jeffrey; Osterholm, Denise; Saranen, David

    2015-01-01T23:59:59.000Z

    The Minos+ experiment is an extension of the Minos experiment at a higher energy and more intense neutrino beam, with the data collection having begun in the fall of 2013. The neutrino beam is provided by the Neutrinos from the Main Injector (NuMI) beam-line at Fermi National Accelerator Laboratory (Fermilab). The detector apparatus consists of two main detectors, one underground at Fermilab and the other in Soudan, Minnesota with the purpose of studying neutrino oscillations at a base line of 735 km. The original data acquisition system has been running for several years collecting data from NuMI, but with the extended run from 2013, parts of the system needed to be replaced due to obsolescence, reliability problems, and data throughput limitations. Specifically, we have replaced the front-end readout controllers, event builder, and data acquisition computing and trigger processing farms with modern, modular and reliable devices with few single points of failure. The new system is based on gigabit Ethernet T...

  5. ABSTRACT & DISSERTATION FORMAT GUIDELINES

    E-Print Network [OSTI]

    Lu, Yi

    2 ABSTRACT & DISSERTATION FORMAT GUIDELINES The Knowledge Navigation Center (second floor these guidelines. The most up-to-date version of the Abstract and Dissertation Format Guidelines is available;2 Abstract Format Guidelines ABSTRACT Title of the Dissertation by by Student's Name Chair: Chair's name Text

  6. Problem 65 in Section 4.1 (Page 274) Constructing a pipeline Supertankers off-load oil at a docking facility 4 mi offshore. The nearest refinery

    E-Print Network [OSTI]

    Schilling, Anne

    facility 4 mi offshore. The nearest refinery is 9 mi east of the shore point nearest the docking facility. A pipeline must be constructed connecting the docking facility with the refinery. The pipeline costs $300.42 miles away from the refinery, or equivalently 3.58 miles away from Point A (as the back of the book has

  7. A novel mutation in the miR-128b gene reduces miRNA processing and leads to glucocorticoid resistance of MLL-AF4 Acute Lymphocytic Leukemia cells

    E-Print Network [OSTI]

    Kotani, Ai

    MLL-AF4 Acute Lymphocytic Leukemia has a poor prognosis, and the mechanisms by which these leukemias develop are not understood despite intensive research based on well-known concepts and methods. MicroRNAs (miRNAs) are a ...

  8. Paleoenvironment of Fort Union Formation, South Dakota

    SciTech Connect (OSTI)

    Goodrum, C.

    1983-08-01T23:59:59.000Z

    Rocks of Paleocene age are represented in the Cave Hills of northwestern South Dakota by the Ludlow, Cannonball, and Tongue River members of the Fort Union Formation. The Cave Hills are situated within the southern margin of the Williston basin, 80 mi (130 km) north of the Black Hills, South Dakota. Numerous fine-grained, fining-upward sedimentary sequences comprise the Ludlow Member and are attributed to meandering streams occupying a low-gradient lower alluvial to upper deltaic plain. The Cannonball Member is 130 ft (40 m) thick in the North Cave Hills and is represented by two fine-grained, coarsening-upward sandstone mudstone sequences. A distinct vertical succession of sedimentary facies occur within each sequence representing offshore/lower shoreface through upper shoreface/foreshore depositional environment. A north to northeast depositional strike for the Cannonball shoreline is inferred from ripple crest and cross-bed orientations. The basal part of the Tongue River consists of approximately 40 to 50 ft (12 to 15 m) of lenticular sandstone, siltstone, mudstone, thin-bedded lignite, and kaolinite beds representing thin broad channels, point-bar, levee, overbank, and nearshore swamp depositional environments. Massive fluvial channel sandstones measuring several tens of ft in thickness overlie the fine-grained basal Tongue River lithologies. These channel sandstones represent the continued progradation of continental/fluvial/coastal plain depositional environments eastward over the marine sandstones of the Cannonball Member.

  9. Ion Chambers for Monitoring the NuMI Neutrino Beam at FNAL

    E-Print Network [OSTI]

    D. Indurthy; R. Keisler; S. Kopp; S. Mendoza; M. Proga; Z. Pavlovich; R. Zwaska; D. Harris; A. Marchionni; J. Morfin; A. Erwin; H. Ping; C. Velissaris; D. Naples; D. Northacker; J. McDonald; M. Diwan; B. Viren

    2004-05-05T23:59:59.000Z

    The Neutrinos at the Main Injector (NuMI) beamline will deliver an intense muon neutrino beam by focusing a beam of mesons into a long evacuated decay volume. The beam must be steered with 1 mRad angular accuracy toward the Soudan Underground Laboratory in northern Minnesota. We have built 4 arrays of ionization chambers to monitor the neutrino beam direction and quality. The arrays are located at 4 stations downstream of the decay volume, and measure the remnant hadron beam and tertiary muons produced along with neutrinos in meson decays. We review how the monitors will be used to make beam quality measurements, and as well we review chamber construction details, radiation damage testing, calibration, and test beam results.

  10. Proposal for continuously-variable neutrino beam energy for the NuMI facility

    SciTech Connect (OSTI)

    Kostin, Mikhail; Kopp, Sacha; /Texas U.; Messier, Mark; /Harvard U.; Harris, Deborah A.; Hylen, Jim; Para, Adam; /Fermilab

    2006-07-01T23:59:59.000Z

    The NuMI Facility was intended to be flexibly changed between 3 energies of beams, LE, ME, and HE. However, the changeover requires extensive downtime to move and realign horns and the target. We propose to implement a flexible arrangement where the target can be remotely moved in the beamline direction to change the beam energy and the horns remain fixed. In addition to having the attractive feature of keeping the horn optics fixed, the motion of the target can be performed more quickly and hence on a more frequent basis. We discuss potential increases in statistics in the high energy region, systematic cross-checks available, and the improved beam monitoring capabilities with such variable energy beams.

  11. Methods for Isolation of Total RNA to Recover miRNAs and Other Small RNAs from Diverse Species

    E-Print Network [OSTI]

    Green, Pamela

    ) size range, the first and most important step is the isolation of high-quality total RNA. Because RNA will present a set of total RNA isolation methods that can be used to maximize the recovery of high-quality RNAChapter 3 Methods for Isolation of Total RNA to Recover miRNAs and Other Small RNAs from Diverse

  12. Corrosion mechanisms of low level vitrified radioactive waste in a loamy soil M.I. Ojovan1

    E-Print Network [OSTI]

    Sheffield, University of

    Corrosion mechanisms of low level vitrified radioactive waste in a loamy soil M.I. Ojovan1 , W to 19 o C. Both ion-exchange and hydrolysis control the corrosion of this glass. Processing of field disposal facilities, which presumes an understanding of the main glass corrosion mechanisms. The corrosion

  13. Conserved Regulation of p53 Network Dosage by MicroRNA125b Occurs through Evolving miRNATarget

    E-Print Network [OSTI]

    Lieberman, Judy

    Conserved Regulation of p53 Network Dosage by MicroRNA­125b Occurs through Evolving mi, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts, United States of America, 3 Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, United States

  14. Society of Automotive Engineers World Congress and Exposition, Detroit, MI, April, 2006 (draft) 1 MEASURING INDUSTRIAL ENERGY SAVINGS

    E-Print Network [OSTI]

    Kissock, Kelly

    Society of Automotive Engineers World Congress and Exposition, Detroit, MI, April, 2006 (draft) 1 MEASURING INDUSTRIAL ENERGY SAVINGS Kelly Kissock and Carl Eger Department of Mechanical and Aerospace a general method for measuring industrial energy savings and demonstrates the method using a case study from

  15. Construction of Parallel Analysis of RNA Ends (PARE) libraries for the study of cleaved miRNA targets

    E-Print Network [OSTI]

    Green, Pamela

    Construction of Parallel Analysis of RNA Ends (PARE) libraries for the study of cleaved mi Green1 1Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19711, USA. 2Illumina to M.A.G. (mgerman@dbi.udel.edu) or P.J.G. (green@dbi.udel.edu). Published online 26 February 2009; doi

  16. Observation of Disappearance of Muon Neutrinos in the NuMI Beam

    SciTech Connect (OSTI)

    Pavlovic, Zarko; /Texas U.

    2008-05-01T23:59:59.000Z

    The Main Injector Neutrino Oscillation Search (MINOS) is a two detector long-baseline neutrino experiment designed to study the disappearance of muon neutrinos. MINOS will test the {nu}{sub {mu}} {yields} {nu}{sub {tau}} oscillation hypothesis and measure precisely {Delta}m{sub 23}{sup 2} and sin{sup 2} 2{theta}{sub 23} oscillation parameters. The source of neutrinos for MINOS experiment is Fermilab's Neutrinos at the Main Injector (NuMI) beamline. The energy spectrum and the composition of the beam is measured at two locations, one close to the source and the other 735 km down-stream in the Soudan Mine Underground Laboratory in northern Minnesota. The precision measurement of the oscillation parameters requires an accurate prediction of the neutrino flux at the Far Detector. This thesis discusses the calculation of the neutrino flux at the Far Detector and its uncertainties. A technique that uses the Near Detector data to constrain the uncertainties in the calculation of the flux is described. The data corresponding to an exposure of 2.5 x 10{sup 20} protons on the NuMI target is presented and an energy dependent disappearance pattern predicted by neutrino oscillation hypotheses is observed in the Far Detector data. The fit to MINOS data, for given exposure, yields the best fit values for {Delta}m{sub 23}{sup 2} and sin{sup 2} 2{theta}{sub 23} to be (2.38{sub -0.16}{sup +0.20}) x 10{sup -3} eV{sup 2}/c{sup 4} and 1.00{sub -0.08}, respectively.

  17. Validation of the MCNPX-PoliMi Code to Design a Fast-Neutron Multiplicity Counter

    SciTech Connect (OSTI)

    J. L. Dolan; A. C. Kaplan; M. Flaska; S. A. Pozzi; D. L. Chichester

    2012-07-01T23:59:59.000Z

    Many safeguards measurement systems used at nuclear facilities, both domestically and internationally, rely on He-3 detectors and well established mathematical equations to interpret coincidence and multiplicity-type measurements for verifying quantities of special nuclear material. Due to resource shortages alternatives to these existing He-3 based systems are being sought. Work is also underway to broaden the capabilities of these types of measurement systems in order to improve current multiplicity analysis techniques. As a part of a Material Protection, Accounting, and Control Technology (MPACT) project within the U.S. Department of Energy's Fuel Cycle Technology Program we are designing a fast-neutron multiplicity counter with organic liquid scintillators to quantify important quantities such as plutonium mass. We are also examining the potential benefits of using fast-neutron detectors for multiplicity analysis of advanced fuels in comparison with He-3 detectors and testing the performance of such designs. The designs are being developed and optimized using the MCNPX-PoliMi transport code to study detector response. In the full paper, we will discuss validation measurements used to justify the use of the MCNPX-PoliMi code paired with the MPPost multiplicity routine to design a fast neutron multiplicity counter with liquid scintillators. This multiplicity counter will be designed with the end goal of safeguarding advanced nuclear fuels. With improved timing qualities associated with liquid scintillation detectors, we can design a system that is less limited by nuclear materials of high activities. Initial testing of the designed system with nuclear fuels will take place at Idaho National Laboratory in a later stage of this collaboration.

  18. The function of supplements required for the formate-pyruvate exchange reaction in Streptococcus faecalis

    E-Print Network [OSTI]

    Smith, Gordon Marsh

    1964-01-01T23:59:59.000Z

    Effect of time and acetate-I-C on formate- pyruvate exchange reaction Effect of time on the uptake of glycylglycine. Ammonia assay standard curve Levels of lipoic acid in APQ synrhetic media Levels of pyridoxine in APQ synthetic media 25 27 28 30...) determined as f ol lowe: Mi ration of spot distance solvent front traveled Levels of vitamin Bd and lipoic acid in APO synthetic media. The relative amount of rhese substances in the defined medium are given. (Fig. 14, 15), Figure l3. Ammonia assay...

  19. A new 'Implicit correlation' method for cross-correlation sampling in MCNPX-PoliMi

    SciTech Connect (OSTI)

    Marcath, M. J.; Larsen, E. W.; Clarke, S. D.; Pozzi, S. A. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Boulevard, Ann Arbor, MI, 48109-2104 (United States)

    2013-07-01T23:59:59.000Z

    Monte Carlo particle transport codes used to accurately model detector response are traditionally run in fully analog mode. Analog simulations of cross-correlation measurements with these codes are extremely time-consuming because the probability of correlated detection is extremely small, approximately equal to the product of the probabilities of a single detection in each detector. The new 'implicit correlation' method described here increases the number of correlation event scores thereby reducing variance and required computation times. The cost of the implicit correlation method is comparable to the cost of simulating single event detection for the lowest absolute detector efficiency in the problem. This method is especially useful in the nuclear non-proliferation and safeguards fields for simulating correlation measurements of shielded special nuclear material. The new method was implemented in MCNPX-PoliMi for neutron-neutron cross-correlations with a Cf-252 spontaneous fission source measured by two detectors of variable stand-offs. The method demonstrated good agreement with analog simulation results for multiple measurement geometries. Small differences between non-analog and analog cross-correlation distributions are attributed to known features of the specific problem simulated that will not be present in practical applications. (authors)

  20. Measurement of Charged Pion Production Yields off the NuMI Target

    E-Print Network [OSTI]

    J. M. Paley; M. D. Messier; R. Raja; U. Akgun; D. M. Asner; G. Aydin; W. Baker; P. D. Barnes, Jr.; T. Bergfeld; L. Beverly; V. Bhatnagar; B. Choudhary; E. C. Dukes; F. Duru; G. J. Feldman; A. Godley; N. Graf; J. Gronberg; E. Gulmez; Y. O. Gunaydin; H. R. Gustafson; E. P. Hartouni; P. Hanlet; M. Heffner; D. M. Kaplan; O. Kamaev; J. Klay; A. Kumar; D. J. Lange; A. Lebedev; J. Ling; M. J. Longo; L. C. Lu; C. Materniak; S. Mahajan; H. Meyer; D. E. Miller; S. R. Mishra; K. Nelson; T. Nigmanov; A. Norman; Y. Onel; A. Penzo; R. J. Peterson; D. Rajaram; D. Ratnikov; C. Rosenfeld; H. Rubin; S. Seun; A. Singh; N. Solomey; R. A. Soltz; Y. Torun; K. Wilson; D. M. Wright; Q. K. Wu

    2014-04-23T23:59:59.000Z

    The fixed-target MIPP experiment, Fermilab E907, was designed to measure the production of hadrons from the collisions of hadrons of momenta ranging from 5 to 120 GeV/c on a variety of nuclei. These data will generally improve the simulation of particle detectors and predictions of particle beam fluxes at accelerators. The spectrometer momentum resolution is between 3 and 4%, and particle identification is performed for particles ranging between 0.3 and 80 GeV/c using $dE/dx$, time-of-flight and Cherenkov radiation measurements. MIPP collected $1.42 \\times10^6$ events of 120 GeV Main Injector protons striking a target used in the NuMI facility at Fermilab. The data have been analyzed and we present here charged pion yields per proton-on-target determined in bins of longitudinal and transverse momentum between 0.5 and 80 GeV/c, with combined statistical and systematic relative uncertainties between 5 and 10%.

  1. LBNL RUNAROUND RESULTS 3.00 km (1.86 mi) October 10, 2003 TOP GROUP STANDINGS FOR 2003

    E-Print Network [OSTI]

    LBNL RUNAROUND RESULTS 3.00 km (1.86 mi) October 10, 2003 page 1 TOP GROUP STANDINGS FOR 2003 , Anton not LBNL 7 11:18.8 Singer, Brett C 30-39 men 3 8 11:20.2 Yegian, Derek 30-39 men 4 9 11:20.4 Nihei 45 13:26.9 card not turned in 46 13:27.4 Elliott, James B 30-39 men 18 #12;LBNL RUNAROUND RESULTS 3

  2. Program Subject(S) required in Program tyPe addition to engliSh S ma mi

    E-Print Network [OSTI]

    Program Subject(S) required in Program tyPe addition to engliSh S ma mi comPuter Science (bSc) Computer Science C x x x humanitieS (ba) Aboriginal Studies (J) x x x African Studies (J) x x x American Studies (J) x x x Celtic Studies x x x Christianity and Culture x x x Christianity and Education x Cinema

  3. B.SMETANA: Quatuor n1 en mi mineur "Z mho Zivota " ("De ma vie ") Allegro vivo appassionnato-Allegro moderato alla Polka-Largo sostenuto-Vivace

    E-Print Network [OSTI]

    Mazliak, Laurent

    B.SMETANA: Quatuor n°1 en mi mineur "Z mého Zivota " ("De ma vie ") Allegro vivo appassionnato- Allegro moderato alla Polka- Largo sostenuto- Vivace Dans la nuit du 19 au 20 octobre 1874, Smetana

  4. Conserved Regulation of p53 Network Dosage by MicroRNA–125b Occurs through Evolving miRNA–Target Gene Pairs

    E-Print Network [OSTI]

    Le, Minh T. N.

    MicroRNAs regulate networks of genes to orchestrate cellular functions. MiR-125b, the vertebrate homologue of the Caenorhabditis elegans microRNA lin-4, has been implicated in the regulation of neural and hematopoietic ...

  5. Hydrodynamic trapping in Mission Canyon Formation (Mississippian) reservoirs: Elkhorn Ranch field, North Dakota

    SciTech Connect (OSTI)

    Demis, W.D. (Marathon Oil Co., Houston, TX (United States))

    1991-03-01T23:59:59.000Z

    Hydrocarbons in Mission Canyon dolomite reservoirs in the Elkhorn Ranch field are trapped by downdip flow of formation water to the northeast. Elkhorn Ranch field is located on a north-plunging anticline with only 10 ft (3 m) of crestal closure. The Mission Canyon is a regressive, shallowing upward sequence of subtidal dolomitized mudstones and wackestones grading upward into sebkha-salina evaporites. Mission Canyon oil production is localized on the north and northeast side of the structure. Maps of porosity pinch-outs and permeability barriers defined from core data, superimposed upon the Mission Canyon structure, show that most of the oil cannot be trapped by stratigraphic facies change. Southwest-trending, updip porosity pinch-outs cross the north-plunging structural axis at an angle so low that hydrocarbons would leak out to the southwest under hydrostatic conditions. Downdip hydrodynamic flow to the northeast provides the critical trapping component. Regional maps of apparent formation water resistivity and water salinity show a region of fresher water south and southwest of the field. A regional potentiometric map constructed using Horner-plot extrapolated shut-in pressure data indicates a head gradient of about 20 ft/mi (4 m/km) to the northeast at Elkhorn Ranch field. This gradient corresponds to a calculated water-oil tilt of about 50 ft/mi (20 m/km). Observed tilt of the oil accumulation is actually about 25 ft/mi (5 m/km) to the northeast. This discrepancy might be the result of the field having not yet reached equilibrium with the invading water.

  6. Executive summary of major NuMI lessons learned: a review of relevant meetings of Fermilab's DUSEL Beamline Working Group

    SciTech Connect (OSTI)

    Andrews, Mike; Appel, Jeffrey A.; Bogert, Dixon; Childress, Sam; Cossairt, Don; Griffing, William; Grossman, Nancy; Harding, David; Hylen, Jim; Kuchler, Vic; Laughton, Chris; /Fermilab /Argonne /Brookhaven /LBL, Berkeley

    2009-05-01T23:59:59.000Z

    We have gained tremendous experience with the NuMI Project on what was a new level of neutrino beams from a high power proton source. We expect to build on that experience for any new long baseline neutrino beam. In particular, we have learned about some things which have worked well and/or where the experience is fairly directly applicable to the next project (e.g., similar civil construction issues including: tunneling, service buildings, outfitting, and potential claims/legal issues). Some things might be done very differently (e.g., decay pipe, windows, target, beam dump, and precision of power supply control/monitoring). The NuMI experience does lead to identification of critical items for any future such project, and what issues it will be important to address. The DUSEL Beamline Working Group established at Fermilab has been meeting weekly to collect and discuss information from that NuMI experience. This document attempts to assemble much of that information in one place. In this Executive Summary, we group relevant discussion of some of the major issues and lessons learned under seven categories: (1) Differences Between the NuMI Project and Any Next Project; (2) The Process of Starting Up the Project; (3) Decision and Review Processes; (4) ES&H: Environment, Safety, and Health; (5) Local Community Buy-In; (6) Transition from Project Status to Operation; and (7) Some Lessons on Technical Elements. We concentrate here on internal project management issues, including technical areas that require special attention. We cannot ignore, however, two major external management problems that plagued the NuMI project. The first problem was the top-down imposition of an unrealistic combination of scope, cost, and schedule. This situation was partially corrected by a rebaselining. However, the full, desirable scope was never achievable. The second problem was a crippling shortage of resources. Critical early design work could not be done in a timely fashion, leading to schedule delays, inefficiencies, and corrective actions. The Working Group discussions emphasized that early planning and up-front appreciation of the problems ahead are very important for minimizing the cost and for the greatest success of any such project. Perhaps part of the project approval process should re-enforce this need. The cost of all this up-front work is now reflected in the DOE cost of any project we do. If we are being held to an upper limit on the project cost, the only thing available for compromise is the eventual project scope.

  7. Associated Shale Gas- From Flares to Rig Power 

    E-Print Network [OSTI]

    Wallace, Elizabeth Michelle

    2014-10-16T23:59:59.000Z

    /D, resulting in the flaring of approximately 266 MMcf/D. The Bakken area is one of the most produced shale oil and condensate formations in the US. Reported volumes for this formation suggest that the amount of associated gas flared is enough to power drilling...

  8. Modeling, History Matching, Forecasting and Analysis of Shale Reservoirs Performance Using Artificial Intelligence

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    matching, forecasting and analyzing oil and gas production in shale reservoirs. In this new approach and analysis of oil and gas production from shale formations. Examples of three case studies in Lower Huron and New Albany shale formations (gas producing) and Bakken Shale (oil producing) is presented

  9. Observing Massive Galaxy Formation

    E-Print Network [OSTI]

    Christopher J. Conselice

    2002-12-20T23:59:59.000Z

    A major goal of contemporary astrophysics is understanding the origin of the most massive galaxies in the universe, particularly nearby ellipticals and spirals. Theoretical models of galaxy formation have existed for many decades, although low and high redshift observations are only beginning to put constraints on different ideas. We briefly describe these observations and how they are revealing the methods by which galaxies form by contrasting and comparing fiducial rapid collapse and hierarchical formation model predictions. The available data show that cluster ellipticals must have rapidly formed at z > 2, and that up to 50% of all massive galaxies at z ~ 2.5 are involved in major mergers. While the former is consistent with the monolithic collapse picture, we argue that hierarchal formation is the only model that can reproduce all the available observations.

  10. Isolating Triggered Star Formation

    SciTech Connect (OSTI)

    Barton, Elizabeth J.; Arnold, Jacob A.; /UC, Irvine; Zentner, Andrew R.; /KICP, Chicago /Chicago U., EFI; Bullock, James S.; /UC, Irvine; Wechsler, Risa H.; /KIPAC, Menlo

    2007-09-12T23:59:59.000Z

    Galaxy pairs provide a potentially powerful means of studying triggered star formation from galaxy interactions. We use a large cosmological N-body simulation coupled with a well-tested semi-analytic substructure model to demonstrate that the majority of galaxies in close pairs reside within cluster or group-size halos and therefore represent a biased population, poorly suited for direct comparison to 'field' galaxies. Thus, the frequent observation that some types of galaxies in pairs have redder colors than 'field' galaxies is primarily a selection effect. We use our simulations to devise a means to select galaxy pairs that are isolated in their dark matter halos with respect to other massive subhalos (N= 2 halos) and to select a control sample of isolated galaxies (N= 1 halos) for comparison. We then apply these selection criteria to a volume-limited subset of the 2dF Galaxy Redshift Survey with M{sub B,j} {le} -19 and obtain the first clean measure of the typical fraction of galaxies affected by triggered star formation and the average elevation in the star formation rate. We find that 24% (30.5 %) of these L* and sub-L* galaxies in isolated 50 (30) h{sup -1} kpc pairs exhibit star formation that is boosted by a factor of {approx}> 5 above their average past value, while only 10% of isolated galaxies in the control sample show this level of enhancement. Thus, 14% (20 %) of the galaxies in these close pairs show clear triggered star formation. Our orbit models suggest that 12% (16%) of 50 (30) h{sup -1} kpc close pairs that are isolated according to our definition have had a close ({le} 30 h{sup -1} kpc) pass within the last Gyr. Thus, the data are broadly consistent with a scenario in which most or all close passes of isolated pairs result in triggered star formation. The isolation criteria we develop provide a means to constrain star formation and feedback prescriptions in hydrodynamic simulations and a very general method of understanding the importance of triggered star formation in a cosmological context.

  11. JPEG File Interchange Format

    E-Print Network [OSTI]

    Hamilton, Eric

    2004-03-30T23:59:59.000Z

    interchange format compressed image representation • PC or Mac or Unix workstation compatible • Standard color space: one or three components. For three components, YCbCr (CCIR 601-256 levels) • APP0 marker used to specify Units, X pixel density, Y pixel... by the Macintosh but not by PCs or workstations. JPEG File Interchange Format, Version 1.02 2 Standard color space The color space to be used is YCbCr as defined by CCIR 601 (256 levels). The RGB components calculated by linear conversion from YCbCr shall...

  12. Hair follicle Formation of

    E-Print Network [OSTI]

    Chuong, Cheng-Ming

    Hair follicle Formation of new follicles Bud Healed skin Hair bulge Open wound Epidermis a b Dermis 1950s and help to explain the controversy. What is the origin of the cells that make up these new hair follicles? Are they derived from existing hair follicles located at the wound edge

  13. Mitsubishi iMiEV: An Electric Mini-Car in NREL's Advanced Technology Vehicle Fleet (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01T23:59:59.000Z

    This fact sheet highlights the Mitsubishi iMiEV, an electric mini-car in the advanced technology vehicle fleet at the National Renewable Energy Laboratory (NREL). In support of the U.S. Department of Energy's fast-charging research efforts, NREL engineers are conducting charge and discharge performance testing on the vehicle. NREL's advanced technology vehicle fleet features promising technologies to increase efficiency and reduce emissions without sacrificing safety or comfort. The fleet serves as a technology showcase, helping visitors learn about innovative vehicles that are available today or are in development. Vehicles in the fleet are representative of current, advanced, prototype, and emerging technologies.

  14. OFFRE DE FORMATION Anne universitaire 2014-15 1

    E-Print Network [OSTI]

    Herrmann, Samuel

    descriptif des études : Schéma général des parcours possibles : PC IEMIMPC IEMI M MP P PC C PC PC MP MP M MI

  15. OFFRE DE FORMATION Anne universitaire 2013-14 1

    E-Print Network [OSTI]

    Herrmann, Samuel

    descriptif des études : Schéma général des parcours possibles : PC IEMIMPC IEMI M MP P PC C PC PC MP MP M MI

  16. Ron Ness will provide comments on the workforce needs of Bakken...

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

    related infrastructure issues that are critical not only to the longevity of the energy production that helps attract capital and workers, but also to the infrastructure issues...

  17. David E. Bakken (Summary page) School of Electrical Engineering and Computer Science,

    E-Print Network [OSTI]

    Bakken, Dave E.

    computing. Recent Professional Recognition 1. Chair, Panel on Cloud Computing. IEEE Innovative Smart Grid Technologies (ISGT) conference, Feb. 2014. 2. Chair, IEEE SmartGridComm Symposium on Wide-Area Monitoring of networking symposium. 3. Co-Editor of book "Vision for Smart Grid Communications: 2030 and Beyond Roadmap

  18. Bioreactor Landfill Research and Demonstration Project Northern Oaks Landfill, Harrison, MI

    SciTech Connect (OSTI)

    Zhao, Xiando; Voice, Thomas; and Hashsham, Syed A.

    2006-08-29T23:59:59.000Z

    A bioreactor landfill cell with 1.2-acre footprint was constructed, filled, operated, and monitored at Northern Oaks Recycling and Disposal Facility (NORDF) at Harrison, MI. With a filled volume of 74,239 cubic yards, the cell contained approximately 35,317 tons of municipal solid waste (MSW) and 20,777 tons of cover soil. It was laid on the slope of an existing cell but separated by a geosynthetic membrane liner. After the cell reached a design height of 60 feet, it was covered with a geosynthetic membrane cap. A three-dimensional monitoring system to collect data at 48 different locations was designed and installed during the construction phase of the bioreactor cell. Each location had a cluster of monitoring devices consisting of a probe to monitor moisture and temperature, a leachate collection basin, and a gas sampling port. An increase in moisture content of the MSW in the bioreactor cell was achieved by pumping leachate collected on-site from various other cells, as well as recirculation of leachate from the bioreactor landfill cell itself. Three types of leachate injection systems were evaluated in this bioreactor cell for their efficacy to distribute pumped leachate uniformly: a leachate injection pipe buried in a 6-ft wide horizontal stone mound, a 15-ft wide geocomposite drainage layer, and a 60-ft wide geocomposite drainage layer. All leachate injection systems were installed on top of the compacted waste surface. The distribution of water and resulting MSW moisture content throughout the bioreactor cell was found to be similar for the three designs. Water coming into and leaving the cell (leachate pumped in, precipitation, snow, evaporation, and collected leachate) was monitored in order to carry out a water balance. Using a leachate injection rate of 26 – 30 gal/yard3, the average moisture content increased from 25% to 35% (wet based) over the period of this study. One of the key aspects of this bioreactor landfill study was to evaluate bioreactor start up and performance in locations with colder climate. For lifts filled during the summer months, methane generation started within three months after completion of the lift. For lifts filled in winter months, very little methane production occurred even eight months after filling. The temperature data indicated that subzero or slightly above zero (oC) temperatures persisted for unusually long periods (more than six months) in the lifts filled during winter months. This was likely due to the high thermal insulation capability of the MSW and the low level of biological activity during start up. This observation indicates that bioreactor landfills located in cold climate and filled during winter months may require mechanisms to increase temperature and initiate biodegradation. Thus, besides moisture, temperature may be the next important factor controlling the biological decomposition in anaerobic bioreactor landfills. Spatial and temporal characterization of leachate samples indicated the presence of low levels of commonly used volatile organic compounds (including acetone, methyl ethyl ketone, methyl isobutyl ketone, and toluene) and metals (including arsenic, chromium, and zinc). Changes and leachate and gaseous sample characteristics correlated with enhanced biological activity and increase in temperature. Continued monitoring of this bioreactor landfill cell is expected to yield critical data needed for start up, design, and operation of this emerging process.

  19. CX-002166: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Evaluation of Key Factors Affecting Successful Oil Production in the Bakken Formation, North DakotaCX(s) Applied: B3.6Date: 05/03/2010Location(s): Grand Forks, North DakotaOffice(s): Fossil Energy, National Energy Technology Laboratory

  20. Planning and Search Exam format

    E-Print Network [OSTI]

    Alechina, Natasha

    is the frame problem. Revision 5 #12;Exam topics: planning Classical planning. How the problem definitionPlanning and Search Revision Revision 1 #12;Outline Exam format Exam topics How to revise Revision 2 #12;Exam format 4 questions out of 6 same format as 2010-2011 and 2011-2012 exams (on G52PAS

  1. Model for isopaching Jurassic-age Norphlet Formation in Mobile Bay, Alabama area

    SciTech Connect (OSTI)

    Torres, L.F.

    1989-03-01T23:59:59.000Z

    Deep gas was discovered in the Norphlet Sandstone of Mobile Bay Alabama in 1979. Sixteen wells, of which Exxon Company, U.S.A. has had an interest in eight, have tested gas from depths greater than 20,000 ft and at an average rate of 19 million ft/sub 3/ of gas per day. The dominant structural features in Mobile Bay are large east-west-trending salt-supported anticlines associated with salt pull-apart listric normal faulting. Throws on these faults measure up to 1000 ft. Individual structures have dimensions as large as 15 mi in an east-west strike direction and 8 mi in a north-south dip direction. The Jurassic age (Callovian) Norphlet of Mobile Bay is characterized by eolian dune sand deposits up to 700 ft thick. An important factor affecting future development drilling is the accurate prediction of reservoir thickness. This presentation shows that an integrated study of seismic and well data has facilitated the development of a geological model for isopaching the Norphlet Formation. The isopach exhibits a strong north-northwest-south-southeast orientation of parallel thicks and thins. These trends are believed to be the result of original eolian deposition of complex linear dunes in the Norphlet Sandstone. The major east-west structural grain of faults and anticlines overprints this preserved depositional trend.

  2. Formation of Carbon Dwarfs

    E-Print Network [OSTI]

    Charles L. Steinhardt; Dimitar D. Sasselov

    2012-01-27T23:59:59.000Z

    We consider the formation of dwarf carbon stars via accretion from a carbon AGB companion in light of the new 107 object sample of Downes et al. (2004). This sample is now large enough to allow good mass determination via comparison of a composite spectrum to theoretical atmospheric models. Carbon dwarfs of spectral type M are indeed main sequence M dwarfs with enhanced metallicity and carbon abundance. We also calculate the predicted abundance of both M and of F/G carbon dwarfs, and show that the latter should be falsifiable in the near future.

  3. Depositional facies and hydrocarbon reservoir compartmentalization of the Mississippian Aux Vases Formation at King Field, Jefferson County, Illinois

    SciTech Connect (OSTI)

    Leetaru, H.E. (Illinois State Geological Survey, Champaign (United States))

    1991-08-01T23:59:59.000Z

    King field has produced over 4 million bbl of oil from the Mississippian Aux Vases Formation along a north-south-trending anticlinal structure 3 mi long and 1.5 mi wide. The porous and permeable quartz sandstone, which comprises the principal hydrocarbon reservoir, can grade laterally into nonporous calcareous sandstone, siltstone, shale, or limestone within one well location (660 ft). The Aux Vases Formation at King field was deposited in an intertidal to subtidal, mixed siliciclastic-carbonate environment, and the resulting mosaic of depositional facies significantly affects reservoirs continuity. Impermeable to only slightly permeable siltstones, shales, and limestones of the various offshore facies, and shales and siltstones of the tidal-flat facies separate the producing sandstones of a tidal channel-offshore bar facies into distinct reservoir compartments. This reservoir heterogeneity results in an oil-water contact at various depths across the field. Lateral compartmentalization of the reservoir has allowed large sections of the Aux Vases reservoir to remain unswept by waterflooding. Volumetric analyses suggest that untapped reservoir compartments may contain an additional 1-2 million bbl of oil recoverable by primary and waterflood methods.

  4. Formation, characterization and reactivity of adsorbed oxygen...

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

    Formation, characterization and reactivity of adsorbed oxygen on BaOPt(111). Formation, characterization and reactivity of adsorbed oxygen on BaOPt(111). Abstract: The formation...

  5. A library of MiMICs allows tagging of genes and reversible, spatial and temporal knockdown of proteins in Drosophila

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

    Nagarkar-Jaiswal, Sonal; Lee, Pei-Tseng; Campbell, Megan E.; Chen, Kuchuan; Anguiano-Zarate, Stephanie; Cantu Gutierrez, Manuel; Busby, Theodore; Lin, Wen-Wen; He, Yuchun; Schulze, Karen L.; et al

    2015-03-31T23:59:59.000Z

    Here, we document a collection of ~7434 MiMIC (Minos Mediated Integration Cassette) insertions of which 2854 are inserted in coding introns. They allowed us to create a library of 400 GFP-tagged genes. We show that 72% of internally tagged proteins are functional, and that more than 90% can be imaged in unfixed tissues. Moreover, the tagged mRNAs can be knocked down by RNAi against GFP (iGFPi), and the tagged proteins can be efficiently knocked down by deGradFP technology. The phenotypes associated with RNA and protein knockdown typically correspond to severe loss of function or null mutant phenotypes. Finally, we demonstratemore »reversible, spatial, and temporal knockdown of tagged proteins in larvae and adult flies. This new strategy and collection of strains allows unprecedented in vivo manipulations in flies for many genes. These strategies will likely extend to vertebrates.« less

  6. Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO HYE-MI KIM, PETER J. WEBSTER, AND JUDITH A. CURRY

    E-Print Network [OSTI]

    Webster, Peter J.

    Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO HYE-MI KIM, PETER J Pacific Ocean warming has been separated into two modes based on the spatial distribution of the maximum impacts on tropical cyclone (TC) activity over the North Pacific by differential modulation of both local

  7. The TAL1 complex targets the FBXW7 tumor suppressor by activating miR-223 in human T cell acute lymphoblastic leukemia

    E-Print Network [OSTI]

    Mansour, Marc R.

    The oncogenic transcription factor TAL1/SCL is aberrantly expressed in 60% of cases of human T cell acute lymphoblastic leukemia (T-ALL) and initiates T-ALL in mouse models. By performing global microRNA (miRNA) expression ...

  8. Rf : Munoz, M.I., Barcellini F., Mollo, V. (2011). Collective elaboration of care for safety in radiotherapy: cooperative management of patient variability. In HEPS'2011 Healthcare Ergonomics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2011-01-01T23:59:59.000Z

    in radiotherapy: cooperative management of patient variability. In HEPS'2011 Healthcare Ergonomics and Patient of patient variability. Maria Isabel Munoz Ergonomics Laboratory Research Center on work Development (CRTD-EA 4132) 41 rue Gay Lussac 75005 Paris mi.munoz@free.fr Flore Barcellini1 Ergonomics Laboratory Research

  9. Michigan State University Community Music School 841-B Timberlane Street East Lansing, MI 48823 Phone: 517-355-7661 Web: cms.msu.edu

    E-Print Network [OSTI]

    Liu, Taosheng

    Michigan State University Community Music School 841-B Timberlane Street · East Lansing, MI 48823 Explore Michigan's past through tour of music, exhibits May 1 Contact: Amanda Darche, MSU Community Music School (517) 355-7661, ext. 16, adarche@msu.edu EAST LANSING, Mich. ­Michigan's past is the inspiration

  10. Society of Automotive Engineers (SAE) Technical Paper 2006-01-1041 Paper presented at SAE 2006 World Congress & Exposition, April 5, 2006, Detroit, MI

    E-Print Network [OSTI]

    Gruner, Sol M.

    Society of Automotive Engineers (SAE) Technical Paper 2006-01-1041 Paper presented at SAE 2006 and Fundamental Advances in Thermal Fluid Sciences 2006. Vol. SP-2015. (Society of Automotive Engineers, Troy, MI and reducing emissions play an essential role in the design of the new-generation automotive internal

  11. Sedimentology of freshwater lacustrine shoreless in the Eocene Scheggs Bed of the Tipton Tongue of the Green River Formation, Sand Wash Basin, Northwest Colorado

    SciTech Connect (OSTI)

    Roehler, H.W.

    1990-12-01T23:59:59.000Z

    In this paper two freshwater shorelines, 40-274 ft thick, were investigated in the Scheggs Bed along Hardgrove Rim, 8 mi north of Maybell, Colorado. The rocks comprising the shorelines consist of interbedded quartzose sandstone, conglomerate, siltstone, shale, oil shale, carbonaceous shale, and coal. The shorelines are divisible into fluvial channel, mudflat, swamp, strandline, nearshore, and offshore lithofacies, which are identified by their stratigraphic positions, characteristic lithologies, and sedimentary structures. A columnar section is presented as a model for similar deposition in other members of the Green River Formation.

  12. FORMATION GESTION DU STRESS CONTEXTE, PUBLIC, FINALITE DE LA FORMATION

    E-Print Network [OSTI]

    Brest, Université de

    FORMATION GESTION DU STRESS CONTEXTE, PUBLIC, FINALITE DE LA FORMATION La vie moderne et le stress : mettre en place des stratégies de gestion , étudier quelques aspects essentiels de la et cas cliniques composés par les participants ou fournis par le formateur . - Jeux de rôle en sous

  13. Star formation in the multiverse

    SciTech Connect (OSTI)

    Bousso, Raphael; Leichenauer, Stefan [Center for Theoretical Physics, Department of Physics, University of California, Berkeley, California 94720-7300 (United States) and Lawrence Berkeley National Laboratory, Berkeley, California 94720-8162 (United States)

    2009-03-15T23:59:59.000Z

    We develop a simple semianalytic model of the star formation rate as a function of time. We estimate the star formation rate for a wide range of values of the cosmological constant, spatial curvature, and primordial density contrast. Our model can predict such parameters in the multiverse, if the underlying theory landscape and the cosmological measure are known.

  14. Star Formation and Galaxy Environment

    E-Print Network [OSTI]

    H. K. C. Yee

    2000-04-05T23:59:59.000Z

    The dependence of star formation rate on galaxian environment is a key issue in the understanding of galaxy formation and evolution. However, the study of this subject is complex and observationally challenging. This paper reviews some of the current results, drawing mostly from recent large redshift surveys such the LCRS, the MORPH collaboration, and the CNOC1 and CNOC2 redshift surveys.

  15. Formation depths of Fraunhofer lines

    E-Print Network [OSTI]

    Gurtovenko, E A

    2015-01-01T23:59:59.000Z

    We have summed up our investigations performed in 1970--1993. The main task of this paper is clearly to show processes of formation of spectral lines as well as their distinction by validity and by location. For 503 photospheric lines of various chemical elements in the wavelength range 300--1000 nm we list in Table the average formation depths of the line depression and the line emission for the line centre and on the half-width of the line, the average formation depths of the continuum emission as well as the effective widths of the layer of the line depression formation. Dependence of average depths of line depression formation on excitation potential, equivalent widths, and central line depth are demonstrated by iron lines.

  16. A study of muon neutrino disappearance with the MINOS detectors and the NuMI neutrino beam

    SciTech Connect (OSTI)

    Marshall, John Stuart; /Cambridge U.

    2008-06-01T23:59:59.000Z

    This thesis presents the results of an analysis of {nu}{sub {mu}} disappearance with the MINOS experiment, which studies the neutrino beam produced by the NuMI facility at Fermi National Accelerator Laboratory. The rates and energy spectra of charged current {nu}{sub {mu}} interactions are measured in two similar detectors, located at distances of 1 km and 735 km along the NuMI beamline. The Near Detector provides accurate measurements of the initial beam composition and energy, while the Far Detector is sensitive to the effects of neutrino oscillations. The analysis uses data collected between May 2005 and March 2007, corresponding to an exposure of 2.5 x 10{sup 20} protons on target. As part of the analysis, sophisticated software was developed to identify muon tracks in the detectors and to reconstruct muon kinematics. Events with reconstructed tracks were then analyzed using a multivariate technique to efficiently isolate a pure sample of charged current {nu}{sub {mu}} events. An extrapolation method was also developed, which produces accurate predictions of the Far Detector neutrino energy spectrum, based on data collected at the Near Detector. Finally, several techniques to improve the sensitivity of an oscillation measurement were implemented, and a full study of the systematic uncertainties was performed. Extrapolating from observations at the Near Detector, 733 {+-} 29 Far Detector events were expected in the absence of oscillations, but only 563 events were observed. This deficit in event rate corresponds to a significance of 4.3 standard deviations. The deficit is energy dependent and clear distortion of the Far Detector energy spectrum is observed. A maximum likelihood analysis, which fully accounts for systematic uncertainties, is used to determine the allowed regions for the oscillation parameters and identifies the best fit values as {Delta}m{sub 32}{sup 2} = 2.29{sub -0.14}{sup +0.14} x 10{sup -3} eV{sup 2} and sin{sup 2} 2{theta}{sub 23} > 0.953 (68% confidence level). The models of neutrino decoherence and decay are disfavored at the 5.0{sigma} and 3.2{sigma} levels respectively, while the no oscillation model is excluded at the 9.4{sigma} level.

  17. Technology and Economics Affecting Unconventional Reservoir Development 

    E-Print Network [OSTI]

    Flores Campero, Cecilia P.

    2010-01-15T23:59:59.000Z

    5.1.1 Low-Permeability Oil (Chalk Reservoirs) ???...? 47 5.1.1.1 Austin Chalk Formation????????? 48 5.1.1.1.1 Production History?????????. 49 5.1.2 Oil Shale???????????????..??. 53 5.1.2.1 Bakken Shale Formation... are more sensitive to certain type of resources such as oil shales and gas hydrates????????????????????.. 3 1.2 Oil shale resources in the Green River formation are giant accumulations waiting for economical exploitation???????????...???... 4 1...

  18. HR 5907: Discovery of the most rapidly rotating magnetic B-type star by the MiMeS Collaboration

    E-Print Network [OSTI]

    Grunhut, J H; Wade, G A; Townsend, R H D; Marcolino, W L F; Bohlender, D A; Szeifert, Th; Petit, V; Matthews, J M; Rowe, J F; Moffat, A F J; Kallinger, T; Kuschnig, R; Guenther, B D; Rucinski, S M; Sasselov, D; Weiss, W W

    2011-01-01T23:59:59.000Z

    We report the discovery and analysis of a very strong magnetic field in the rapidly rotating early B-type star HR 5907, based on observations obtained as part of the Magnetism in Massive Stars (MiMeS) project. We infer a rotation period of 0.508276 +0.000015/-0.000012 d from photometric and H{\\alpha} EW measurements, making this the shortest period, non-degenerate, magnetic massive star known to date. From the comparison of IUE UV and optical spectroscopy with LTE BRUCE/KYLIE models we find a solid-angle integrated, uniform black-body temperature of 17 000 \\pm 1000 K, a projected rotational velocity of 290 \\pm 10 km/s, an equatorial radius of 3.1 \\pm 0.2 R_sun, a stellar mass of 5.5 \\pm 0.5 M_sun, and an inclination angle of the rotation axis to our line-of-sight of 70 \\pm 10\\circ. Our measurements of the longitudinal magnetic field, which vary between -500 and -2000 G, phase coherently with the rotation period and imply a surface dipole field strength of \\sim15.7 kG. On the other hand, from fits to mean Leas...

  19. Treating tar sands formations with karsted zones

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Karanikas, John Michael (Houston, TX)

    2010-03-09T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. The tar sands formation may have one or more karsted zones. Methods may include providing heat from one or more heaters to one or more karsted zones of the tar sands formation to mobilize fluids in the formation. At least some of the mobilized fluids may be produced from the formation.

  20. Use-driven concept formation

    E-Print Network [OSTI]

    Roberts, Jennifer M. (Jennifer Marie)

    2010-01-01T23:59:59.000Z

    When faced with a complex task, humans often identify domain-specific concepts that make the task more tractable. In this thesis, I investigate the formation of domain-specific concepts of this sort. I propose a set of ...

  1. Reservoir characterization of multiple-bar sandstones in the Mississippian Cypress Formation, Tamaroa Field, Perry County, Illinois

    SciTech Connect (OSTI)

    Grube, J.P. (Illinois State Geological Survey, Champaign (United States))

    1991-08-01T23:59:59.000Z

    Tamaroa field produces principally from lenticular sandstones in the upper part of the Chesterian Cypress Formation. These sandstone bodies, interpreted to be marine bars, are typically less than 10 ft thick, 0.25 to 0.5 mi wide,and less than 2 mi long. The bars are vertically stacked and trend northeast-southwest in an en echelon pattern. Spontaneous potential and gamma ray log character, as well as core data, show that shales ranging in thickness from 10 ft to less than 1 ft separate the sandstones. Hydrocarbons are produced from the clean parts of the bars that drape across three structural folds. Multiple structural closures and the stacking of shale-separated bars create discrete reservoir compartments in Tamaroa field. Understanding reservoir compartmentalization is a key factor in designing and infill drilling or waterflood program in a multiple-bar complex such as the one at Tamaroa field. Optimum recovery efficiency therefore can be achieved by using a detailed reservoir model.

  2. Volume and accessibility of entrained (solution) methane in deep geopressured reservoirs - tertiary formations of the Texas Gulf Coast. Final report

    SciTech Connect (OSTI)

    Gregory, A.R.; Dodge, M.M.; Posey, J.S.; Morton, R.A.

    1980-10-01T23:59:59.000Z

    The objective of this project was to appraise the total volume of in-place methane dissolved in formation waters of deep sandstone reservoirs of the onshore Texas Gulf Coast within the stratigraphic section extending from the base of significant hydrocarbon production (8000 ft)* to the deepest significant sandstone occurrence. The area of investigation is about 50,000 mi/sup 2/. Factors that determine the total methane resource are reservoir bulk volume, porosity, and methane solubility; the latter is controlled by the temperature, pressure, and salinity of formation waters. Regional assessment of the volume and the distribution of potential sandstone reservoirs was made from a data base of 880 electrical well logs, from which a grid of 24 dip cross sections and 4 strike cross sections was constructed. Solution methane content in each of nine formations or divisions of formations was determined for each subdivision. The distribution of solution methane in the Gulf Coast was described on the basis of five reservoir models. Each model was characterized by depositional environment, reservoir continuity, porosity, permeability, and methane solubility.

  3. Ice Formation in Gas-Diffusion Layers

    E-Print Network [OSTI]

    Dursch, Thomas

    2013-01-01T23:59:59.000Z

    the University of California. Ice Formation in Gas-Diffusionsub-freezing conditions, ice forms in the gas-diffusionstrategies exist to prevent ice formation, there is little

  4. REGULATORY COOPERATION COUNCIL - WORK PLANNING FORMAT: Natural...

    Energy Savers [EERE]

    FORMAT: Natural Gas Use in Transportation REGULATORY COOPERATION COUNCIL - WORK PLANNING FORMAT: Natural Gas Use in Transportation RCC Workplan NGV.PDF More Documents &...

  5. Preliminary Measurement of Neutrino Oscillation Parameters By NuMI/MINOS and Calibration Studies for Improving this Measurement

    SciTech Connect (OSTI)

    Symes, Philip Andrew

    2005-11-01T23:59:59.000Z

    This thesis explains the origins of neutrinos and their interactions, and the phenomenon of neutrino oscillations. Experiments for measuring neutrino oscillations are mentioned and the experiment investigated in this thesis, the ''Main Injector Neutrino Oscillation Search'', and its neutrino beam, the Fermi National Accelerator Laboratory's ''Neutrinos At The Main Injector'', are described. MINOS is a long baseline (735 km) neutrino oscillation experiment with a near and a far detector, intended to make precision measurements of the atmospheric sector neutrino oscillation parameters. A measurement is made of the ''atmospheric'' neutrino oscillation parameters, {Delta}m{sub 23}{sup 2} and sin {sup 2}(2{theta}{sub 23}), using neutrinos from the NuMI beam. The results of this analysis are compared to measurements at MINOS using neutrinos from the atmosphere and with other experiments. A more detailed method of beam neutrino analysis is discussed, and the extra calibrations needed to perform that analysis properly are described, with special attention paid to two aspects of the calibration, which comprise the bulk of work for this thesis. The light injection calibration system uses LEDs to illuminate the detector readout and provides a normalization of the stability of the detector over time. The hardware and different modi operandi of the system are described. There is a description of installation and commissioning of the system at one of the MINOS detectors. The response normalization of each detector with cosmic ray muons is described. Special attention is paid to the explanation of necessary corrections that must be made to the muon sample in order for the sample to be used to calibrate each detector to the specified accuracy. The performance of the calibration is shown.

  6. South Mississippi's Hosston, Sligo formations

    SciTech Connect (OSTI)

    Not Available

    1981-08-24T23:59:59.000Z

    The Hosston and Sligo formations, of Early Cretaceous age, lie above the Cotton Valley group and below the Pine Island formation. The beds dip southwesterly and become thicker within the Mississippi Interior Salt basin, where virtually all of the Hosston/Sligo oil and gas production occurs. The 3500 ft of alternating sands and shales found at 10,000-17,000 ft depths have the attributes of fluvial deltaic sediments. The Newsom, Bowie Creek, and Seminary fields are representative of recent gas discoveries in the Hosston/Sligo.

  7. Big Stick/Four Eyes fields: structural, stratigraphic, and hydrodynamic trapping within Mission Canyon Formation, Williston basin

    SciTech Connect (OSTI)

    Breig, J.J.

    1988-07-01T23:59:59.000Z

    The Mississippian Mission Canyon formation of the Williston basin is the region's most prolific oil producing horizon. Big Stick/Four Eyes is among the most prolific of the Mission Canyon fields. Primary production from 87 wells is projected to reach 47 million bbl of oil. An additional 10-20 million bbl may be recovered through waterflooding. The complex was discovered in 1977 by the Tenneco 1-29 BN, a wildcat with primary objectives in the Devonian Duperow and Ordovician Red River Formations. A series of Mission Canyon discoveries followed in the Big Stick, Treetop, T-R, and Mystery Creek fields. Early pressure studies showed that these fields were part of an extensive common reservoir covering 44.75 mi/sup 2/ (115.91 km/sup 2/). The reservoir matrix is formed from restricted marine dolostones deposited on a low-relief ramp. Landward are algal-laminated peritidal limestones and saline and supratidal evaporites of a sabkhalike shoreline system. Open-marine limestones, rich in crinoids, brachiopods, and corals, mark the seaward limit of reservoir facies. Regressive deposition placed a blanket of anhydrite over the carbonate sequence providing a seal for the reservoir. Lateral trapping is accomplished through a combination of processes. Upper reservoir zones form belts of porosity that parallel the northeasterly trending shoreline. The trend is cut by the northward plunging Billings anticline, which provides structural closure to the north. Facies changes pinch out porosity to the south and east. Trapping along depositional strike to the southwest is only partially controlled by stratigraphic or structural factors. A gentle tilt of 25 ft per mi (5 m per km) occurs in the oil-water contact to the east-northeast, due to freshwater influx from Mississippian outcrop on the southern and southwestern basin margins.

  8. Method of fracturing a geological formation

    DOE Patents [OSTI]

    Johnson, James O. (2679-B Walnut, Los Alamos, NM 87544)

    1990-01-01T23:59:59.000Z

    An improved method of fracturing a geological formation surrounding a well bore is disclosed. A relatively small explosive charge is emplaced in a well bore and the bore is subsequently hydraulically pressurized to a pressure less than the formation breakdown pressure and preferably greater than the fracture propagation pressure of the formation. The charge is denoted while the bore is so pressurized, resulting in the formation of multiple fractures in the surrounding formation with little or no accompanying formation damage. Subsequent hydraulic pressurization can be used to propagate and extend the fractures in a conventional manner. The method is useful for stimulating production of oil, gas and possibly water from suitable geologic formations.

  9. Treating tar sands formations with dolomite

    DOE Patents [OSTI]

    Vinegar, Harold J.; Karanikas, John Michael

    2010-06-08T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. The tar sands formation may include dolomite and hydrocarbons. Methods may include providing heat at less than the decomposition temperature of dolomite from one or more heaters to at least a portion of the formation. At least some of the hydrocarbon fluids are mobilized in the formation. At least some of the hydrocarbon fluids may be produced from the formation.

  10. Formation Interuniversitaire de Physique Hydrodynamics

    E-Print Network [OSTI]

    Balbus, Steven

    Formation Interuniversitaire de Physique Module : Hydrodynamics S. Balbus 1 #12;TO LEARN.8.3 Piston Driven into Gas Cylinder . . . . . . . . . . . . . 73 4.8.4 Driven Acoustic Modes . . . . . . . . . . . . . . . . 110 6.2.3 Inertial Drag of a Sphere by an Ideal Fluid . . . . . . . 113 6.3 Line Vortices and Flow

  11. Structurally Electromagnetic Formation Flight (EMFF)

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Structurally connected secondary mirror EMFF secondary mirror EMFF Design Electromagnetic Formation for a smaller, simpler system. µEMFF investigates the use of conventional conductors, capacitors, and solar propellants that often limit lifetime, the EMFF system uses solar power to energize a magnetic field

  12. Star Formation in the Multiverse

    E-Print Network [OSTI]

    Raphael Bousso; Stefan Leichenauer

    2008-10-17T23:59:59.000Z

    We develop a simple semi-analytic model of the star formation rate (SFR) as a function of time. We estimate the SFR for a wide range of values of the cosmological constant, spatial curvature, and primordial density contrast. Our model can predict such parameters in the multiverse, if the underlying theory landscape and the cosmological measure are known.

  13. Earth and Terrestrial Planet Formation

    E-Print Network [OSTI]

    Jacobson, Seth A

    2015-01-01T23:59:59.000Z

    The growth and composition of Earth is a direct consequence of planet formation throughout the Solar System. We discuss the known history of the Solar System, the proposed stages of growth and how the early stages of planet formation may be dominated by pebble growth processes. Pebbles are small bodies whose strong interactions with the nebula gas lead to remarkable new accretion mechanisms for the formation of planetesimals and the growth of planetary embryos. Many of the popular models for the later stages of planet formation are presented. The classical models with the giant planets on fixed orbits are not consistent with the known history of the Solar System, fail to create a high Earth/Mars mass ratio, and, in many cases, are also internally inconsistent. The successful Grand Tack model creates a small Mars, a wet Earth, a realistic asteroid belt and the mass-orbit structure of the terrestrial planets. In the Grand Tack scenario, growth curves for Earth most closely match a Weibull model. The feeding zon...

  14. VEHICLE NETWORKS: ACHIEVING REGULAR FORMATION

    E-Print Network [OSTI]

    VEHICLE NETWORKS: ACHIEVING REGULAR FORMATION MADALENA CHAVES, ROBERT DAY, LUCIA GOMEZ a network of vehicles exchanging information among themselves with the intention of achieving a specified the performance of the vehicle network. A stochastic model for information flow is also considered, allowing

  15. Cloud Formation, Evolution and Destruction

    E-Print Network [OSTI]

    Estalella, Robert

    Chapter 4 Cloud Formation, Evolution and Destruction We now begin to trace the journey towards a star. How long does this take? The answer is surprisingly short: a good many clouds already contain new stars and these stars tend to be young. The typical cloud cannot spend long, if any time at all

  16. Absorption and elimination of formate following oral administration of calcium formate in female human subjects

    E-Print Network [OSTI]

    Hanzlik, Robert P.; Fowler, Stephen C.; Eells, Janis T.

    2005-02-01T23:59:59.000Z

    Published abstract: Calcium formate is a water-soluble salt of an essential mineral nutrient with potential for use as a dietary calcium supplement. Formate ion is a product of endogenous and xenobiotic metabolism, but sustained high plasma formate...

  17. Photophoresis boosts giant planet formation

    E-Print Network [OSTI]

    Teiser, Jens

    2013-01-01T23:59:59.000Z

    In the core accretion model of giant planet formation, a solid protoplanetary core begins to accrete gas directly from the nebula when its mass reaches about 5 earth masses. The protoplanet has at most a few million years to reach runaway gas accretion, as young stars lose their gas disks after 10 million years at the latest. Yet gas accretion also brings small dust grains entrained in the gas into the planetary atmosphere. Dust accretion creates an optically thick protoplanetary atmosphere that cannot efficiently radiate away the kinetic energy deposited by incoming planetesimals. A dust-rich atmosphere severely slows down atmospheric cooling, contraction, and inflow of new gas, in contradiction to the observed timescales of planet formation. Here we show that photophoresis is a strong mechanism for pushing dust out of the planetary atmosphere due to the momentum exchange between gas and dust grains. The thermal radiation from the heated inner atmosphere and core is sufficient to levitate dust grains and to ...

  18. Formation of polar ring galaxies

    E-Print Network [OSTI]

    F. Bournaud; F. Combes

    2003-02-04T23:59:59.000Z

    Polar ring galaxies are peculiar systems in which a gas rich, nearly polar ring surrounds an early-type or elliptical host galaxy. Two formation scenarios for these objects have been proposed: they are thought to form either in major galaxy mergers or by tidal accretion of the polar material from a gas rich donor galaxy. Both scenarios are studied through N-body simulations including gas dynamics and star formation. Constraints on physical parameters are drawn out, in order to determine which scenario is the most likely to occur. Polar ring galaxies from each scenario are compared with observations and we discuss whether the accretion scenario and the merging scenario account for observational properties of polar ring galaxies. The conclusion of this study is that the accretion scenario is both the most likely and the most supported by observations. Even if the merging scenario is rather robust, most polar ring galaxies are shown to be the result of tidal gas accretion events.

  19. Rapid gas hydrate formation process

    DOE Patents [OSTI]

    Brown, Thomas D.; Taylor, Charles E.; Unione, Alfred J.

    2013-01-15T23:59:59.000Z

    The disclosure provides a method and apparatus for forming gas hydrates from a two-phase mixture of water and a hydrate forming gas. The two-phase mixture is created in a mixing zone which may be wholly included within the body of a spray nozzle. The two-phase mixture is subsequently sprayed into a reaction zone, where the reaction zone is under pressure and temperature conditions suitable for formation of the gas hydrate. The reaction zone pressure is less than the mixing zone pressure so that expansion of the hydrate-forming gas in the mixture provides a degree of cooling by the Joule-Thompson effect and provides more intimate mixing between the water and the hydrate-forming gas. The result of the process is the formation of gas hydrates continuously and with a greatly reduced induction time. An apparatus for conduct of the method is further provided.

  20. Laser beam pulse formatting method

    DOE Patents [OSTI]

    Daly, T.P.; Moses, E.I.; Patterson, R.W.; Sawicki, R.H.

    1994-08-09T23:59:59.000Z

    A method for formatting a laser beam pulse using one or more delay loops is disclosed. The delay loops have a partially reflective beam splitter and a plurality of highly reflective mirrors arranged such that the laser beam pulse enters into the delay loop through the beam splitter and circulates therein along a delay loop length defined by the mirrors. As the laser beam pulse circulates within the delay loop a portion thereof is emitted upon each completed circuit when the laser beam pulse strikes the beam splitter. The laser beam pulse is thereby formatted into a plurality of sub-pulses. The delay loops are used in combination to produce complex waveforms by combining the sub-pulses using additive waveform synthesis. 8 figs.

  1. Shock Formation in Lovelock Theories

    E-Print Network [OSTI]

    Harvey S. Reall; Norihiro Tanahashi; Benson Way

    2014-09-12T23:59:59.000Z

    We argue that Lovelock theories of gravity suffer from shock formation, unlike General Relativity. We consider the propagation of (i) a discontinuity in curvature, and (ii) weak, high frequency, gravitational waves. Such disturbances propagate along characteristic hypersurfaces of a "background" spacetime and their amplitude is governed by a transport equation. In GR the transport equation is linear. In Lovelock theories, it is nonlinear and its solutions can blow up, corresponding to the formation of a shock. We show that this effect is absent in some simple cases e.g. a flat background spacetime, and demonstrate its presence for a plane wave background. We comment on weak cosmic censorship, the evolution of shocks, and the nonlinear stability of Minkowski spacetime, in Lovelock theories.

  2. Kinetic models of opinion formation

    E-Print Network [OSTI]

    G. Toscani

    2006-05-17T23:59:59.000Z

    We introduce and discuss certain kinetic models of (continuous) opinion formation involving both exchange of opinion between individual agents and diffusion of information. We show conditions which ensure that the kinetic model reaches non trivial stationary states in case of lack of diffusion in correspondence of some opinion point. Analytical results are then obtained by considering a suitable asymptotic limit of the model yielding a Fokker-Planck equation for the distribution of opinion among individuals.

  3. Formation damage in underbalanced drilling operations

    E-Print Network [OSTI]

    Reyes Serpa, Carlos Alberto

    2003-01-01T23:59:59.000Z

    Formation damage has long been recognized as a potential source of reduced productivity and injectivity in both horizontal and vertical wells. From the moment that the pay zone is being drilled until the well is put on production, a formation...

  4. Structure formation: Models, Dynamics and Status

    E-Print Network [OSTI]

    T. Padmanabhan

    1995-08-25T23:59:59.000Z

    The constraints on the models for the structure formation arising from various cosmological observations at different length scales are reviewed. The status of different models for structure formation is examined critically in the light of these observations.

  5. Dynamics and control of electromagnetic satellite formations

    E-Print Network [OSTI]

    Ahsun, Umair, 1972-

    2007-01-01T23:59:59.000Z

    Satellite formation flying is an enabling technology for many space missions, especially for space-based telescopes. Usually there is a tight formation-keeping requirement that may need constant expenditure of fuel or at ...

  6. Treating nahcolite containing formations and saline zones

    DOE Patents [OSTI]

    Vinegar, Harold J

    2013-06-11T23:59:59.000Z

    A method for treating a nahcolite containing subsurface formation includes removing water from a saline zone in or near the formation. The removed water is heated using a steam and electricity cogeneration facility. The heated water is provided to the nahcolite containing formation. A fluid is produced from the nahcolite containing formation. The fluid includes at least some dissolved nahcolite. At least some of the fluid is provided to the saline zone.

  7. Autonomous Helicopter Formation using Model Predictive Control

    E-Print Network [OSTI]

    Sastry, S. Shankar

    Autonomous Helicopter Formation using Model Predictive Control Hoam Chung and S. Shankar Sastry are required to fly in tight formations and under harsh conditions. The starting point for safe autonomous into a formation, so that each vehicle can safely maintain sufficient space between it and all other vehicles

  8. Gas Cooling Through Galaxy Formations

    E-Print Network [OSTI]

    Mariwan A. Rasheed; Mohamad A. Brza

    Abstract-- Gas cooling was studied in two different boxes of sizes and by simulation at same redshifts. The gas cooling is shown in four different redshifts (z=1.15, 0.5, 0.1 and 0). In the simulation the positions of the clumps of cooled gas were studied with slices of the two volumes and also the density of cooled gas of the two volumes shown in the simulation. From the process of gas cooling it is clear that this process gives different results in the two cases. Index Term- Gas Cooling, Simulation, galaxy Formation. I.

  9. Petrophysical evaluation of subterranean formations

    DOE Patents [OSTI]

    Klein, James D; Schoderbek, David A; Mailloux, Jason M

    2013-05-28T23:59:59.000Z

    Methods and systems are provided for evaluating petrophysical properties of subterranean formations and comprehensively evaluating hydrate presence through a combination of computer-implemented log modeling and analysis. Certain embodiments include the steps of running a number of logging tools in a wellbore to obtain a variety of wellbore data and logs, and evaluating and modeling the log data to ascertain various petrophysical properties. Examples of suitable logging techniques that may be used in combination with the present invention include, but are not limited to, sonic logs, electrical resistivity logs, gamma ray logs, neutron porosity logs, density logs, NRM logs, or any combination or subset thereof.

  10. Electrochemical formation of field emitters

    DOE Patents [OSTI]

    Bernhardt, Anthony F. (Berkeley, CA)

    1999-01-01T23:59:59.000Z

    Electrochemical formation of field emitters, particularly useful in the fabrication of flat panel displays. The fabrication involves field emitting points in a gated field emitter structure. Metal field emitters are formed by electroplating and the shape of the formed emitter is controlled by the potential imposed on the gate as well as on a separate counter electrode. This allows sharp emitters to be formed in a more inexpensive and manufacturable process than vacuum deposition processes used at present. The fabrication process involves etching of the gate metal and the dielectric layer down to the resistor layer, and then electroplating the etched area and forming an electroplated emitter point in the etched area.

  11. Heating tar sands formations while controlling pressure

    DOE Patents [OSTI]

    Stegemeier, George Leo (Houston, TX) [Houston, TX; Beer, Gary Lee (Houston, TX) [Houston, TX; Zhang, Etuan (Houston, TX) [Houston, TX

    2010-01-12T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. A pressure in the majority of the section may be maintained below a fracture pressure of the formation. The pressure in the majority of the section may be reduced to a selected pressure after the average temperature reaches a temperature that is above 240.degree. C. and is at or below pyrolysis temperatures of hydrocarbons in the section. At least some hydrocarbon fluids may be produced from the formation.

  12. Coring in deep hardrock formations

    SciTech Connect (OSTI)

    Drumheller, D.S.

    1988-08-01T23:59:59.000Z

    The United States Department of Energy is involved in a variety of scientific and engineering feasibility studies requiring extensive drilling in hard crystalline rock. In many cases well depths extend from 6000 to 20,000 feet in high-temperature, granitic formations. Examples of such projects are the Hot Dry Rock well system at Fenton Hill, New Mexico and the planned exploratory magma well near Mammoth Lakes, California. In addition to these programs, there is also continuing interest in supporting programs to reduce drilling costs associated with the production of geothermal energy from underground sources such as the Geysers area near San Francisco, California. The overall progression in these efforts is to drill deeper holes in higher temperature, harder formations. In conjunction with this trend is a desire to improve the capability to recover geological information. Spot coring and continuous coring are important elements in this effort. It is the purpose of this report to examine the current methods used to obtain core from deep wells and to suggest projects which will improve existing capabilities. 28 refs., 8 figs., 2 tabs.

  13. A Random Walk through Star and Planet Formation

    E-Print Network [OSTI]

    Maness, Holly

    2010-01-01T23:59:59.000Z

    and its Neptune-Mass Planet 3.1 Introduction . . . . . . .of Low Mass Star Formation . . . . . 1.3 Planet FormationConstraining Theories of Planet Formation and Evolution .

  14. \\\\mi\\home\\gillow\\LaTeX\\Comp\\Safety\\Risk-Assessments\\Roof\\Sedum Roof Area Roof Access Risk Assessments 3th March 2014.docx `Sedum' Roof Area(s)/Roof Access Risk Assessments

    E-Print Network [OSTI]

    \\\\mi\\home\\gillow\\LaTeX\\Comp\\Safety\\Risk-Assessments\\Roof\\Sedum Roof Area Roof Access Risk Assessments 3th March 2014.docx `Sedum' Roof Area(s)/Roof Access Risk Assessments DEPARTMENT: Andrew Wiles March 2015 Brief description of area and location Roof tops, walkways, and Fire Route. Sedum' Roof Area

  15. Adaptive Optics in Star Formation

    E-Print Network [OSTI]

    Wolfgang Brandner

    2003-09-29T23:59:59.000Z

    Over the past ten years, the concept of adaptive optics has evolved from early experimental stages to a standard observing tool now available at almost all major optical and near-infrared telescope facilities. Adaptive optics will also be essential in exploiting the full potential of the large optical/infrared interferometers currently under construction. Both observations with high-angular resolution and at high contrast, and with a high point source sensitivity are facilitated by adaptive optics. Among the areas which benefit most from the use of adaptive optics are studies of the circumstellar environment (envelopes, disks, outflows), substellar companions and multiple systems, and dense young stellar populations. This contribution highlights some of the recent advances in star formation studies facilitated by adaptive optics, and gives a brief tutorial on optimized observing and data reduction strategies.

  16. Zonal Flow as Pattern Formation

    E-Print Network [OSTI]

    Parker, Jeffrey B

    2015-01-01T23:59:59.000Z

    In this section, we examine the transition from statistically homogeneous turbulence to inhomogeneous turbulence with zonal flows. Statistical equations of motion can be derived from the quasilinear approximation to the Hasegawa-Mima equation. We review recent work that finds a bifurcation of these equations and shows that the emergence of zonal flows mathematically follows a standard type of pattern formation. We also show that the dispersion relation of modulational instability can be extracted from the statistical equations of motion in a certain limit. The statistical formulation can thus be thought to offer a more general perspective on growth of coherent structures, namely through instability of a full turbulent spectrum. Finally, we offer a physical perspective on the growth of large-scale structures.

  17. Methanol Masers and Star Formation

    E-Print Network [OSTI]

    A. M. Sobolev; A. B. Ostrovskii; M. S. Kirsanova; O. V. Shelemei; M. A. Voronkov; A. V. Malyshev

    2006-01-12T23:59:59.000Z

    Methanol masers which are traditionally divided into two classes provide possibility to study important parts of the star forming regions: Class~II masers trace vicinities of the massive YSOs while class~I masers are likely to trace more distant parts of the outflows where newer stars can form. There are many methanol transitions which produce observed masers. This allows to use pumping analysis for estimation of the physical parameters in the maser formation regions and its environment, for the study of their evolution. Extensive surveys in different masing transitions allow to conclude on the values of the temperatures, densities, dust properties, etc. in the bulk of masing regions. Variability of the brightest masers is monitored during several years. In some cases it is probably caused by the changes of the dust temperature which follow variations in the brightness of the central YSO reflecting the character of the accretion process. A unified catalogue of the class II methanol masers consisting of more than 500 objects is compiled. Analysis of the data shows that: physical conditions within the usual maser source vary considerably; maser brightness is determined by parameters of some distinguished part of the object - maser formation region; class II methanol masers are formed not within the outflows but in the regions affected by their propagation. It is shown that the "near" solutions for the kinematic distances to the sources can be used for statistical analysis. The luminosity function of the 6.7 GHz methanol masers is constructed. It is shown that improvement of the sensitivity of surveys can increase number of detected maser sources considerably.

  18. Norphlet Formation (Upper Jurassic) sand erg: depositional model for northeastern De Soto salt basin, eastern Gulf of Mexico

    SciTech Connect (OSTI)

    Kemmer, D.A.; Reagan, R.L.

    1987-05-01T23:59:59.000Z

    Available well control, seismic reflection geometries, and seismic modeling suggest the interpretation of a Norphlet Formation (Upper Jurassic) sand erg in the northeastern De Soto salt basin. Ranging in thickness from less than 100 ft to nearly 1000 ft, the Norphlet erg encompasses an area of approximately 700 mi/sup 2/. Separated from the major gas accumulation in the Norphlet in the Mobile Bay area by the offshore extension of the Pensacola arch, the Norphlet erg appears to be oriented transverse to the axis of the De Soto salt basin. Seismic signatures for the Smackover carbonate, Norphlet sand, and Louann Salt intervals are investigated using synthetic seismograms generated from six wells in the eastern Gulf of Mexico. General characteristics about the reflection coefficients from the major units in the interval are noted. The reflection coefficient information and synthetic seismograms are used to interpret seismic data on a regional basis. Two-dimensional, vertical-incidence, ray-trace modeling of the seismic data is done to aid the interpretation on a detailed basis. Interpreted Norphlet sandstone thicknesses and Louann Salt structures are combined to support the Norphlet Formation sand erg hypothesis.

  19. Radio Triggered Star Formation in Cooling Flows

    E-Print Network [OSTI]

    B. R. McNamara

    1999-11-08T23:59:59.000Z

    The giant galaxies located at the centers of cluster cooling flows are frequently sites of vigorous star formation. In some instances, star formation appears to have been triggered by the galaxy's radio source. The colors and spectral indices of the young populations are generally consistent with short duration bursts or continuous star formation for durations much less than 1 Gyr, which is less than the presumed ages of cooling flows. The star formation properties are inconsistent with fueling by a continuously accreting cooling flow, although the prevalence of star formation is consistent with repeated bursts and periodic refueling. Star formation may be fueled, in some cases, by cold material stripped from neighboring cluster galaxies.

  20. Floating insulated conductors for heating subsurface formations

    DOE Patents [OSTI]

    Burns, David; Goodwin, Charles R.

    2014-07-29T23:59:59.000Z

    A heating system for a subsurface formation includes a conduit located in a first opening in the subsurface formation. Three electrical conductors are located in the conduit. A return conductor is located inside the conduit. The return conductor is electrically coupled to the ends of the electrical conductors distal from the surface of the formation. Insulation is located inside the conduit. The insulation electrically insulates the three electrical conductors, the return conductor, and the conduit from each other.

  1. Nonequilibrium Atmospheric Secondary Organic Aerosol Formation...

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

    Aerosol Formation and Growth. Abstract: Airborne particles play a critical role in air quality, human health effects, visibility and climate. Secondary organic aerosols (SOA)...

  2. Heating tar sands formations to visbreaking temperatures

    DOE Patents [OSTI]

    Karanikas, John Michael (Houston, TX); Colmenares, Tulio Rafael (Houston, TX); Zhang, Etuan (Houston, TX); Marino, Marian (Houston, TX); Roes, Augustinus Wilhelmus Maria (Houston, TX); Ryan, Robert Charles (Houston, TX); Beer, Gary Lee (Houston, TX); Dombrowski, Robert James (Houston, TX); Jaiswal, Namit (Houston, TX)

    2009-12-22T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. The heat may be controlled so that at least a majority of the section reaches an average temperature of between 200.degree. C. and 240.degree. C., which results in visbreaking of at least some hydrocarbons in the section. At least some visbroken hydrocarbon fluids may be produced from the formation.

  3. Standard Format and Content for Emergency Plans

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-08-21T23:59:59.000Z

    This volume addresses recommended emergency plan format and content for Operational Emergency Base Programs and Operational Emergency Hazardous Material Programs. Canceled by DOE G 151.1-3.

  4. Heating systems for heating subsurface formations

    DOE Patents [OSTI]

    Nguyen, Scott Vinh (Houston, TX); Vinegar, Harold J. (Bellaire, TX)

    2011-04-26T23:59:59.000Z

    Methods and systems for heating a subsurface formation are described herein. A heating system for a subsurface formation includes a sealed conduit positioned in an opening in the formation and a heat source. The sealed conduit includes a heat transfer fluid. The heat source provides heat to a portion of the sealed conduit to change phase of the heat transfer fluid from a liquid to a vapor. The vapor in the sealed conduit rises in the sealed conduit, condenses to transfer heat to the formation and returns to the conduit portion as a liquid.

  5. Hydrogen Adsorption Induces Interlayer Carbon Bond Formation...

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

    Hydrogen Adsorption Induces Interlayer Carbon Bond Formation in Supported Few-Layer Graphene Friday, February 28, 2014 Among the allotropes of carbon, diamond has some of the most...

  6. Treating tar sands formations with dolomite

    DOE Patents [OSTI]

    Vinegar, Harold J.; Karanikas, John Michael

    2013-10-15T23:59:59.000Z

    A method for treating a karsted formation containing heavy hydrocarbons and dolomite includes providing heat to at least part of one or more karsted layers in the formation from one or more heaters located in the karsted layers. A temperature in at least one of the karsted layers is allowed to reach a decomposition temperature of dolomite in the formation. The dolomite is allowed to decompose and at least some hydrocarbons are produced from at least one of the karsted layers of the formation.

  7. Theoretical Investigations on the Formation and Dehydrogenation...

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

    of boron-nitrogen-hydrogen (BNHx) compounds that are promising materials for chemical hydrogen storage. Understanding the kinetics and reaction pathways of formation of these...

  8. Format requirements of thermal neutron scattering data in a nuclear data format to succeed the ENDF format

    SciTech Connect (OSTI)

    Brown, D. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2014-03-31T23:59:59.000Z

    In November 2012, the Working Party on Evaluation Cooperation Subgroup 38 (WPEC-SG38) began with the task of developing a nuclear data format and supporting infrastructure to replace the now nearly 50 year old ENDF format. The first step in this process is to develop requirements for the new format and infrastructure. In this talk, I will review the status of ENDF's Thermal Scattering Law (TSL) formats as well as support for this data in the GND format (from which the new format is expected to evolve). Finally, I hope to begin a dialog with members of the thermal neutron scattering community so that their data needs can be accurately and easily accommodated by the new format and tools, as captured by the requirements document. During this discussion, we must keep in mind that the new tools and format must; Support what is in existing data files; Support new things we want to put in data files; and Be flexible enough for us to adapt it to future unanticipated challenges.

  9. Study of the near-threshold <mi>?> <mi>?> mass enhancement in doubly OZI-suppressed <mi>J> / <mi>?> ? <mi>?> <mi>?> <mi>?> decays

    SciTech Connect (OSTI)

    Ablikim, M.; Achasov, M. N.; Albayrak, O.; Ambrose, D. J.; An, F. F.; An, Q.; Bai, J. Z.; Ban, Y.; Becker, J.; Bennett, J. V.; Bertani, M.; Bian, J. M.; Boger, E.; Bondarenko, O.; Boyko, I.; Briere, R. A.; Bytev, V.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S. J.; Chen, X.; Chen, Y. B.; Cheng, H. P.; Chu, Y. P.; Cronin-Hennessy, D.; Dai, H. L.; Dai, J. P.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Ding, W. M.; Ding, Y.; Dong, L. Y.; Dong, M. Y.; Du, S. X.; Fang, J.; Fang, S. S.; Fava, L.; Feng, C. Q.; Ferroli, R. B.; Friedel, P.; Fu, C. D.; Gao, Y.; Geng, C.; Goetzen, K.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, T.; Guo, Y. P.; Han, Y. L.; Harris, F. A.; He, K. L.; He, M.; He, Z. Y.; Held, T.; Heng, Y. K.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, J. F.; Hu, T.; Huang, G. M.; Huang, G. S.; Huang, J. S.; Huang, L.; Huang, X. T.; Huang, Y.; Huang, Y. P.; Hussain, T.; Ji, C. S.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. L.; Jiang, X. S.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Jing, F. F.; Kalantar-Nayestanaki, N.; Kavatsyuk, M.; Kopf, B.; Kornicer, M.; Kuehn, W.; Lai, W.; Lange, J. S.; Leyhe, M.; Li, C. H.; Li, Cheng; Li, Cui; Li, D. M.; Li, F.; Li, G.; Li, H. B.; Li, J. C.; Li, K.; Li, Lei; Li, Q. J.; Li, S. L.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, X. R.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Liao, X. T.; Lin, D.; Liu, B. J.; Liu, C. L.; Liu, C. X.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H.; Liu, H. B.; Liu, H. H.; Liu, H. M.; Liu, H. W.; Liu, J. P.; Liu, K.; Liu, K. Y.; Liu, Kai; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Z. A.; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H.; Lu, G. R.; Lu, H. J.; Lu, J. G.; Lu, Q. W.; Lu, X. R.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lv, M.; Ma, C. L.; Ma, F. C.; Ma, H. L.; Ma, Q. M.; Ma, S.; Ma, T.; Ma, X. Y.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Messchendorp, J. G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Morales Morales, C.; Muchnoi, N. Yu.; Muramatsu, H.; Nefedov, Y.; Nicholson, C.; Nikolaev, I. B.; Ning, Z.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Park, J. W.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Ping, J. L.; Ping, R. G.; Poling, R.; Prencipe, E.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, L. Q.; Qin, X. S.; Qin, Y.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Rong, G.; Ruan, X. D.; Sarantsev, A.; Schaefer, B. D.; Shao, M.; Shen, C. P.; Shen, X. Y.; Sheng, H. Y.; Shepherd, M. R.; Song, X. Y.; Spataro, S.; Spruck, B.; Sun, D. H.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Toth, D.; Ullrich, M.; Varner, G. S.; Wang, B. Q.; Wang, D.; Wang, D. Y.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, Q. J.; Wang, S. G.; Wang, X. F.; Wang, X. L.; Wang, Y. F.; Wang, Z.; Wang, Z. G.; Wang, Z. Y.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, Q. G.; Wen, S. P.; Werner, M.; Wiedner, U.; Wu, L. H.; Wu, N.; Wu, S. X.; Wu, W.; Wu, Z.; Xia, L. G.; Xiao, Z. J.; Xie, Y. G.; Xiu, Q. L.; Xu, G. F.; Xu, G. M.; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Xu, Z. R.; Xue, F.; Xue, Z.; Yan, L.; Yan, W. B.; Yan, Y. H.; Yang, H. X.; Yang, Y.; Yang, Y. X.; Ye, H.; Ye, M.; Ye, M. H.; Yu, B. X.; Yu, C. X.; Yu, H. W.; Yu, J. S.; Yu, S. P.; Yuan, C. Z.; Yuan, Y.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, R.; Zhang, S. H.; Zhang, X. J.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhang, Zhenghao; Zhao, G.; Zhao, H. S.; Zhao, J. W.; Zhao, K. X.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. Z.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, Y. H.; Zhong, B.; Zhong, Z.; Zhou, L.; Zhou, X. K.; Zhou, X. R.; Zhu, C.; Zhu, K.; Zhu, K. J.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. M.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zou, B. S.; Zou, J. H.

    2013-02-01T23:59:59.000Z

    A 2.25×10? J/? event sample accumulated with the BESIII detector is used to study the doubly Okubo-Zweig-Iizuka-suppressed decay modes J/?????, ????????, ??K?K?. A strong deviation (>30?) from three-body J/????? phase space is observed near the ?? mass threshold that is consistent with a previous observation reported by the BESII experiment. A partial wave analysis with a tensor covariant amplitude that assumes that the enhancement is due to the presence of a resonance, the X(1810), is performed and confirms that the spin-parity of the X(1810) is 0??. The mass and width of the X(1810) are determined to be M=1795±7(stat)+13-5(syst)±19(mod) MeV/c² and ?=95±10(stat)+21-34(syst)±75(mod) MeV/c², respectively, and the product branching fraction is measured to be B(J/???X(1810))×B(X(1810)???)=(2.00±0.08(stat)+0.45-1.00(syst)±1.30(mod))×10??. These results are consistent within errors with those of the BESII experiment.

  10. Le logiciel "Tigre" en formation PLC 1 Grtice J. Vincent Le logiciel Tigre en formation PLC

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    "Tigre" en formation PLC 1 Grétice J. Vincent Le logiciel « Tigre » en formation PLC J. Vincent Le;______________________________________________________________________________________ Le logiciel "Tigre" en formation PLC 2 Grétice J. Vincent 1.1. La lecture Voici l'écran d;______________________________________________________________________________________ Le logiciel "Tigre" en formation PLC 3 Grétice J. Vincent Figure 3 1.2. La démonstration Voici l

  11. Shell Formation and Bone Strength Laying Hens

    E-Print Network [OSTI]

    Shell Formation and Bone Strength in Laying Hens Effects of Age, Daidzein and Exogenous Estrogen Cover aquarelle: E. Spörndly-Nees #12;Shell Formation and Bone Strength in Laying Hens Effects of Age eggshells as shell quality declines with age during the laying period. This is a concern for food safety

  12. DISSERTATION FORMATION OF THE HURRICANE EYE

    E-Print Network [OSTI]

    Schubert, Wayne H.

    DISSERTATION FORMATION OF THE HURRICANE EYE Submitted by Jonathan L. Vigh Department of Atmospheric OF THE HURRICANE EYE BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY. Schubert Department Head: Richard H. Johnson ii #12;ABSTRACT OF DISSERTATION FORMATION OF THE HURRICANE EYE

  13. FAINT RADIO SOURCES AND STAR FORMATION HISTORY

    E-Print Network [OSTI]

    Waddington, Ian

    FAINT RADIO SOURCES AND STAR FORMATION HISTORY Deborah B. Haarsma 1 , R. Bruce Partridge 1 , Ian 85287­1504 USA Abstract. Faint extragalactic radio sources provide important information about the global history of star formation. Sensitive radio observations of the Hubble Deep Field and other fields

  14. First Structure Formation and the First Stars

    E-Print Network [OSTI]

    Michael L. Norman; Tom Abel; Greg Bryan

    2000-05-11T23:59:59.000Z

    We discuss the results of recent 3D simulations of first structure formation in relationship to the formation of the first stars. On the basis of a new, high-resolution AMR simulation (spatial dynamic range = 30,000,000), we conclude that the first stars are likely to be massive.

  15. Methods for forming wellbores in heated formations

    DOE Patents [OSTI]

    Guimerans, Rosalvina Ramona; Mansure, Arthur James

    2012-09-25T23:59:59.000Z

    A method for forming a wellbore in a heated formation includes flowing liquid cooling fluid to a bottom hole assembly in a wellbore in a heated formation. At least a portion of the liquid cooling fluid is vaporized at or near a region to be cooled. Vaporizing the liquid cooling fluid absorbs heat from the region to be cooled.

  16. Sequentially Triggered Star Formation in OB Associations

    E-Print Network [OSTI]

    Thomas Preibisch; Hans Zinnecker

    2006-10-27T23:59:59.000Z

    We discuss observational evidence for sequential and triggered star formation in OB associations. We first review the star formation process in the Scorpius-Centaurus OB association, the nearest OB association to the Sun, where several recent extensive studies have allowed us to reconstruct the star formation history in a rather detailed way. We then compare the observational results with those obtained for other OB associations and with recent models of rapid cloud and star formation in the turbulent interstellar medium. We conclude that the formation of whole OB subgroups (each consisting of several thousand stars) requires large-scale triggering mechanisms such as shocks from expanding wind and supernova driven superbubbles surrounding older subgroups. Other triggering mechanisms, like radiatively driven implosion of globules, also operate, but seem to be secondary processes, forming only small stellar groups rather than whole OB subgroups with thousands of stars.

  17. The Formation of the Hubble Sequence

    E-Print Network [OSTI]

    Christopher J. Conselice

    2003-12-12T23:59:59.000Z

    The history of galaxy formation via star formation and stellar mass assembly rates is now known with some certainty, yet the connection between high redshift and low redshift galaxy populations is not yet clear. By identifying and studying individual massive galaxies at high-redshifts, z > 1.5, we can possibly uncover the physical effects driving galaxy formation. Using the structures of high-z galaxies, as imaged with the Hubble Space Telescope, we argue that it is now possible to directly study the progenitors of ellipticals and disks. We also briefly describe early results that suggest many massive galaxies are forming at z > 2 through major mergers.

  18. HYDROCARBON FORMATION ON POLYMER-SUPPORTED COBALT

    E-Print Network [OSTI]

    Benner, Linda S.

    2013-01-01T23:59:59.000Z

    NV~ August 25-29, 1980 HYDROCARBON FORMATION ON POLYMER-catalyzed reduction of CO to hydrocarbons Tropscb. Among theof CO to saturated linear hydrocarbons and appears to retain

  19. Modeling deposit formation in diesel injector nozzle

    E-Print Network [OSTI]

    Sudhiesh Kumar, Chintoo

    2009-01-01T23:59:59.000Z

    Formation of deposit in the diesel injector nozzle affects the injection behavior and hinders performance. Under running condition, deposit precursors are washed away by the ensuing injection. However, during the cool down ...

  20. Electromagnetic formation flight of satellite arrays

    E-Print Network [OSTI]

    Kwon, Daniel W., 1980-

    2005-01-01T23:59:59.000Z

    Proposed methods of actuating spacecraft in sparse aperture arrays use propellant as a reaction mass. For formation flying systems, propellant becomes a critical consumable which can be quickly exhausted while maintaining ...

  1. Cyclic Imide Dioxime: Formation and Hydrolytic Stability

    SciTech Connect (OSTI)

    Kang, S.O. [University of Kansas; Vukovic, Sinisa [ORNL; Custelcean, Radu [ORNL; Hay, Benjamin [ORNL

    2012-01-01T23:59:59.000Z

    Poly(acrylamidoximes) play an important role in the uranium extraction from seawater. The present work reports solution studies of simple analogs to address the formation and stability of two binding sites present in these polymers, open-chain amidoximes and cyclic imide dioximes, including: 1) conditions that maximize the formation of the cyclic form, 2) existence of a base-induced conversion from open-chain to cyclic form, and 3) degradation under acid and base conditions.

  2. Situ microbial plugging process for subterranean formations

    DOE Patents [OSTI]

    McInerney, Michael J. (Norman, OK); Jenneman, Gary E. (Norman, OK); Knapp, Roy M. (Norman, OK); Menzie, Donald E. (Norman, OK)

    1985-12-17T23:59:59.000Z

    Subterranean paths of water flow are impeded or changed by the facilitation of microbial growth therein. Either indigenous bacterial growth may be stimulated with nutrients or the formation may be first seeded with bacteria or their spores which inhibit fluid flow after proliferation. These methods and bacteria are usable to alter the flow of water in a waterflooded oil formation and to impede the outflow of contaminated water.

  3. Formation evaluation MWD enters new capability realm

    SciTech Connect (OSTI)

    Hearn, F. (Baker Hughes INTEQ, Houston, TX (United States))

    1994-11-01T23:59:59.000Z

    Recent industry advances in formation evaluation measurement-while-drilling (FEMWD) have been achieved in well log data acquisition quality and in geosteering drilling applications. This paper presents new technology as applied by Baker Hughes INTEQ which includes: geosteering techniques which help navigate through horizontally drilled reservoirs including improved quality dual propagation resistivity, neutron-porosity and formation-density measurements; predictive modeling of tool responses in reservoir geosteering applications; environmental computer modeling which aids interpretation, including tool eccentering; and new measurement enhancements.

  4. Triggered star formation in the Magellanic Clouds

    E-Print Network [OSTI]

    B. G. Elmegreen; J. Palous; Kenji Bekki

    2006-01-01T23:59:59.000Z

    Abstract. We discuss how tidal interaction between the Large Magellanic Cloud (LMC), the Small Magellanic Cloud (SMC), and the Galaxy triggers galaxy-wide star formation in the Clouds for the last ? 0.2 Gyr based on our chemodynamical simulations on the Clouds. Our simulations demonstrate that the tidal interaction induces the formation of asymmetric spiral arms with high gas densities and consequently triggers star formation within the arms in the LMC. Star formation rate in the present LMC is significantly enhanced just above the eastern edge of the LMC’s stellar bar owing to the tidal interaction. The location of the enhanced star formation is very similar to the observed location of 30 Doradus, which suggests that the formation of 30 Doradus is closely associated with the last Magellanic collision about 0.2 Gyr ago. The tidal interaction can dramatically compress gas initially within the outer part of the SMC so that new stars can be formed from the gas to become intergalactic young stars in the inter-Cloud region (e.g., the Magellanic Bridge). The metallicity distribution function of the newly formed stars in the Magellanic Bridge has a peak of [Fe/H] ? ?0.8, which is significantly lower than the stellar metallicity of the SMC.

  5. Creating and maintaining a gas cap in tar sands formations

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Karanikas, John Michael (Houston, TX); Dinkoruk, Deniz Sumnu (Houston, TX); Wellington, Scott Lee (Bellaire, TX)

    2010-03-16T23:59:59.000Z

    Methods for treating a tar sands formation are disclosed herein. Methods for treating a tar sands formation may include providing heat to at least part of a hydrocarbon layer in the formation from one or more heaters located in the formation. Pressure may be allowed to increase in an upper portion of the formation to provide a gas cap in the upper portion. At least some hydrocarbons are produced from a lower portion of the formation.

  6. Hydrogen Bubbles and Formation of Nanoporous Silicon during Electroche...

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

    Bubbles and Formation of Nanoporous Silicon during Electrochemical Etching. Hydrogen Bubbles and Formation of Nanoporous Silicon during Electrochemical Etching. Abstract: Many...

  7. NO Adsorption on Ultrathin O Films: Formation of Nitrite and...

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

    Adsorption on Ultrathin O Films: Formation of Nitrite and Nitrate Species. NO Adsorption on Ultrathin O Films: Formation of Nitrite and Nitrate Species. Abstract: Interaction of...

  8. Multifunctional, Inorganic-Filled Separators for Large Format...

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

    & Publications Multifunctional, Inorganic-Filled Separators for Large Format, Li-ion Batteries Multifunctional, Inorganic-Filled Separators for Large Format, Li-ion Batteries...

  9. Atomistic Model for the Polyamide Formation from ?-Lactam...

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

    Model for the Polyamide Formation from ?-Lactam Catalyzed by Candida Antarctica Lipase B. Atomistic Model for the Polyamide Formation from ?-Lactam Catalyzed by Candida...

  10. Fayalite Dissolution and Siderite Formation in Water-Saturated...

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

    Fayalite Dissolution and Siderite Formation in Water-Saturated Supercritical CO2. Fayalite Dissolution and Siderite Formation in Water-Saturated Supercritical CO2. Abstract:...

  11. Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized...

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

    Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized via Reactive Layer Assisted Deposition. Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized via Reactive...

  12. Mixed-mode diesel HCCI with External Mixture Formation: Preliminary...

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

    Mixed-mode diesel HCCI with External Mixture Formation: Preliminary Results Mixed-mode diesel HCCI with External Mixture Formation: Preliminary Results 2003 DEER Conference...

  13. Predicting Nickel Precipitate Formation in Contaminated Soils. (3717)

    E-Print Network [OSTI]

    Sparks, Donald L.

    Predicting Nickel Precipitate Formation in Contaminated Soils. (3717) Authors: E. Peltier* - Univ controlling precipitate formation is still needed. In this study, we have combined experimental data on nickel

  14. ash formation deposition: Topics by E-print Network

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

    deep-water depositional systems : the upper Miocene Upper Mount messenger formation, Taranaki Basin, New Zealand and Pliocene Repetto and Pico formations, Ventura Basin,...

  15. ash deposit formation: Topics by E-print Network

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

    deep-water depositional systems : the upper Miocene Upper Mount messenger formation, Taranaki Basin, New Zealand and Pliocene Repetto and Pico formations, Ventura Basin,...

  16. Brown carbon formation from ketoaldehydes of biogenic monoterpenes...

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

    Brown carbon formation from ketoaldehydes of biogenic monoterpenes. Brown carbon formation from ketoaldehydes of biogenic monoterpenes. Abstract: Sources and chemical composition...

  17. Effects of Ambient Density and Temperature on Soot Formation...

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

    Density and Temperature on Soot Formation under High-EGR Conditions Effects of Ambient Density and Temperature on Soot Formation under High-EGR Conditions Presentation given at...

  18. The Formation and Evolution of Prestellar Cores

    E-Print Network [OSTI]

    Philippe André; Shantanu Basu; Shu-ichiro Inutsuka

    2008-01-28T23:59:59.000Z

    Improving our understanding of the initial conditions and earliest stages of star formation is crucial to gain insight into the origin of stellar masses, multiple systems, and protoplanetary disks. We review the properties of low-mass dense cores as derived from recent millimeter/submillimeter observations of nearby molecular clouds and discuss them in the context of various contemporary scenarios for cloud core formation and evolution. None of the extreme scenarios can explain all observations. Pure laminar ambipolar diffusion has relatively long growth times for typical ionization levels and has difficulty satisfying core lifetime constraints. Purely hydrodynamic pictures have trouble accounting for the inefficiency of core formation and the detailed velocity structure of individual cores. A possible favorable scenario is a mixed model involving gravitational fragmentation of turbulent molecular clouds close to magnetic criticality. The evolution of the magnetic field and angular momentum in individual cloud cores after the onset of gravitational collapse is also discussed. In particular, we stress the importance of radiation-magnetohydrodynamical processes and resistive MHD effects during the protostellar phase. We also emphasize the role of the formation of the short-lived first (protostellar) core in providing a chance for sub-fragmentation into binary systems and triggering MHD outflows. Future submillimeter facilities such as Herschel and ALMA will soon provide major new observational constraints in this field. On the theoretical side, an important challenge for the future will be to link the formation of molecular clouds and prestellar cores in a coherent picture.

  19. Factors of paleosol formation in a Late Cretaceous eolian sand sheet paleoenvironment, Marlia Formation, Southeastern Brazil

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Formation, Southeastern Brazil Patrick Francisco Führ Dal' Bó a, , Giorgio Basilici a , Rômulo Simões), Brazil b IG ­ Universidade Federal do Pará, 66075-110, Belém (PA), Brazil a b s t r a c ta r t i c l e i Late Cretaceous The Marília Formation, which crops out in southeastern Brazil, is interpreted as a Late

  20. Star formation bursts in isolated spiral galaxies

    E-Print Network [OSTI]

    C. Clarke; D. Gittins

    2006-07-03T23:59:59.000Z

    We study the response of the gaseous component of a galactic disc to the time dependent potential generated by N-body simulations of a spiral galaxy. The results show significant variation of the spiral structure of the gas which might be expected to result in significant fluctuations in the Star Formation Rate (SFR). Pronounced local variations of the SFR are anticipated in all cases. Bursty histories for the global SFR, however, require that the mean surface density is much less (around an order of magnitude less) than the putative threshold for star formation. We thus suggest that bursty star formation histories, normally attributed to mergers and/or tidal interactions, may be a normal pattern for gas poor isolated spiral galaxies.

  1. In situ oxidation of subsurface formations

    DOE Patents [OSTI]

    Beer, Gary Lee (Houston, TX); Mo, Weijian (Sugar Land, TX); Li, Busheng (Houston, TX); Shen, Chonghui (Calgary, CA)

    2011-01-11T23:59:59.000Z

    Methods and systems for treating a hydrocarbon containing formation described herein include providing heat to a first portion of the formation from a plurality of heaters in the first portion, producing produced through one or more production wells in a second portion of the formation, reducing or turning off heat provided to the first portion after a selected time, providing an oxidizing fluid through one or more of the heater wells in the first portion, providing heat to the first portion and the second portion through oxidation of at least some hydrocarbons in the first portion, and producing fluids through at least one of the production wells in the second portion. The produced fluids may include at least some oxidized hydrocarbons produced in the first portion.

  2. Formation of double-$?$ hypernuclei at PANDA

    E-Print Network [OSTI]

    T. Gaitanos; A. B. Larionov; H. Lenske; U. Mosel

    2012-01-17T23:59:59.000Z

    We study the formation of single- and double-$\\Lambda$ hypernuclei in antiproton-induced reactions relevant for the forthcoming PANDA experiment at FAIR. We use the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model with relativistic mean-fields for the description of non-equilibrium dynamics and the statistical multifragmentation model (SMM) for fragment formation. This combined approach describes the dynamical properties of strangeness and fragments in low energy $\\bar{p}$-induced reactions fairly well. We then focus on the formation of double-$\\Lambda$ hypernuclei in high energy $\\bar{p}$-nucleus collisions on a primary target including the complementary $\\Xi$-induced reactions to a secondary one, as proposed by the PANDA collaboration. Our results show that a copious production of double-$\\Lambda$ hyperfragments is possible at PANDA. In particular, we provide first theoretical estimations on the double-$\\Lambda$ production cross section, which strongly rises with decreasing energy of the secondary $\\Xi$-beam.

  3. Unveiling the Formation of Massive Galaxies

    E-Print Network [OSTI]

    Christopher J. Conselice

    2004-04-21T23:59:59.000Z

    Massive galaxies, such as nearby ellipticals, have relatively low number densities, yet they host the majority of the stellar mass in the universe. Understanding their origin is a central problem of galaxy formation. Age dating of stellar populations found in modern ellipticals, and observations of star formation in high redshift galaxies, allow us to determine roughly when these systems formed. These age diagnostics however do not tell us what triggered star formation, or how galaxies form as opposed to simply when. Recent analyses of the structures of z > 2 ultraviolet selected galaxies reveal that major galaxy mergers are a likely method for forming some massive galaxies. There are however galaxy populations at high redshift (z > 2), namely infrared and sub-millimeter bright systems, whose evolutionary relationship to modern ellipticals is still uncertain. An improved characterization of these and other high redshift galaxy populations is achievable with large infrared imaging and spectroscopic surveys.

  4. Galaxy formation with radiative and chemical feedback

    E-Print Network [OSTI]

    Graziani, L; Schneider, R; Kawata, D; de Bennassuti, M; Maselli, A

    2015-01-01T23:59:59.000Z

    Here we introduce GAMESH, a novel pipeline which implements self-consistent radiative and chemical feedback in a computational model of galaxy formation. By combining the cosmological chemical-evolution model GAMETE with the radiative transfer code CRASH, GAMESH can post process realistic outputs of a N-body simulation describing the redshift evolution of the forming galaxy. After introducing the GAMESH implementation and its features, we apply the code to a low-resolution N-body simulation of the Milky Way formation and we investigate the combined effects of self-consistent radiative and chemical feedback. Many physical properties, which can be directly compared with observations in the Galaxy and its surrounding satellites, are predicted by the code along the merger-tree assembly. The resulting redshift evolution of the Local Group star formation rates, reionisation and metal enrichment along with the predicted Metallicity Distribution Function of halo stars are critically compared with observations. We dis...

  5. The Formation of Primordial Luminous Objects

    E-Print Network [OSTI]

    Emanuele Ripamonti; Tom Abel

    2005-07-06T23:59:59.000Z

    In these lecture notes we review the current knowledge about the formation of the first luminous objects. We start from the cosmological context of hierarchical models of structure formation, and discuss the main physical processes which are believed to lead to primordial star formation, i.e. the cooling processes and the chemistry of molecules (especially H2) in a metal-free gas. We then describe the techniques and results of numerical simulations, which indicate that the masses of the first luminous objects are likely to be much larger than that of present-day stars. Finally, we discuss the scenario presented above, exposing some of the most interesting problems which are currently being investigated, such as that of the feedback effects of these objects.

  6. Formation of Cyanoformaldehyde in the interstellar space

    E-Print Network [OSTI]

    Das, Ankan; Chakrabarti, Sandip K; Saha, Rajdeep; Chakrabarti, Sonali

    2013-01-01T23:59:59.000Z

    Cyanoformaldehyde (HCOCN) molecule has recently been suspected towards the Sagittarius B2(N) by the Green Bank telescope, though a confirmation of this observation has not yet been made. In and around a star forming region, this molecule could be formed by the exothermic reaction between two abundant interstellar species, H$_2$CO and CN. Till date, the reaction rate coefficient for the formation of this molecule is unknown. Educated guesses were used to explain the abundance of this molecule by chemical modeling. In this paper, we carried out quantum chemical calculations to find out empirical rate coefficients for the formation of HCOCN and different chemical properties during the formation of HCOCN molecules. Though HCOCN is stable against unimolecular decomposition, this gas phase molecule could be destroyed by many other means, like: ion-molecular reactions or by the effect of cosmic rays. Ion-molecular reaction rates are computed by using the capture theories. We have also included the obtained rate coef...

  7. STAR FORMATION IN TWO LUMINOUS SPIRAL GALAXIES

    SciTech Connect (OSTI)

    Hunter, Deidre A.; Ashburn, Allison; Wright, Teresa [Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States); Elmegreen, Bruce G. [IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598 (United States); Rubin, Vera C. [Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington, DC 20015 (United States); Józsa, Gyula I. G.; Struve, Christian [ASTRON (Netherlands Organisation for Scientific Research NWO), Oude Hoogeveensedijk 4, 7991-PD Dwingeloo (Netherlands)

    2013-10-01T23:59:59.000Z

    We examined star formation in two very luminous (M{sub V} = –22 to –23) Sc-type spiral galaxies, NGC 801 and UGC 2885, using ultra-deep H? images. We combine these H? images with UBV and Two-Micron All-Sky Survey JHK images and H I maps to explore the star formation characteristics of disk galaxies at high luminosity. H? traces star formation in these galaxies to 4-6 disk scale lengths, but the lack of detection of H? further out is likely due to the loss of Lyman continuum photons. Considering gravitational instabilities alone, we find that the gas and stars in the outer regions are marginally stable in an average sense, but considering dissipative gas and radial and azimuthal forcing, the outer regions are marginally unstable to forming spiral arms. Star formation is taking place in spiral arms, which are regions of locally higher gas densities. Furthermore, we have traced smooth exponential stellar disks over four magnitudes in V-band surface brightness and 4-6 disk scale lengths, in spite of a highly variable gravitational instability parameter. Thus, gravitational instability thresholds do not seem relevant to the stellar disk. One possibility for creating an exponential disk is that the molecular cloud densities and star formation rates have exponential profiles and this fact forces the stellar disk to build up such a profile. Another possibility is that the stellar disk is continuously adjusted to an exponential shape regardless of the star formation profile, for example, through global dynamical processes that scatter stars. However, such scattering processes are only known to operate in spiral systems, in which case they cannot explain the same dilemma of smooth exponential disks observed in dwarf irregular galaxies.

  8. The Efficiency of Globular Cluster Formation

    E-Print Network [OSTI]

    Dean E. McLaughlin

    1999-01-21T23:59:59.000Z

    (Abridged): The total populations of globular cluster systems (GCSs) are discussed in terms of their connection to the efficiency of globular cluster formation---the mass fraction of star-forming gas that was able to form bound stellar clusters rather than isolated stars or unbound associations---in galaxy halos. Observed variations in GCS specific frequencies (S_N=N_gc/L_gal), both as a function of galactocentric radius in individual systems and globally between entire galaxies, are reviewed in this light. It is argued that trends in S_N do not reflect any real variation in the underlying efficiency of cluster formation; rather, they result from ignoring the hot gas in many large ellipticals. This claim is checked and confirmed in each of M87, M49, and NGC 1399, for which existing data are combined to show that the volume density profile of globular clusters, rho_cl, is directly proportional to the sum of (rho_gas+rho_stars) at large radii. The constant of proportionality is the same in each case: epsilon=0.0026 +/- 0.0005 in the mean. This is identified with the globular cluster formation efficiency. The implication that epsilon might have had a universal value is supported by data on the GCSs of 97 early-type galaxies, on the GCS of the Milky Way, and on the ongoing formation of open clusters. These results have specific implications for some issues in GCS and galaxy formation, and they should serve as a strong constraint on more general theories of star and cluster formation.

  9. Parallel heater system for subsurface formations

    DOE Patents [OSTI]

    Harris, Christopher Kelvin (Houston, TX); Karanikas, John Michael (Houston, TX); Nguyen, Scott Vinh (Houston, TX)

    2011-10-25T23:59:59.000Z

    A heating system for a subsurface formation is disclosed. The system includes a plurality of substantially horizontally oriented or inclined heater sections located in a hydrocarbon containing layer in the formation. At least a portion of two of the heater sections are substantially parallel to each other. The ends of at least two of the heater sections in the layer are electrically coupled to a substantially horizontal, or inclined, electrical conductor oriented substantially perpendicular to the ends of the at least two heater sections.

  10. Creating fluid injectivity in tar sands formations

    DOE Patents [OSTI]

    Stegemeier, George Leo; Beer, Gary Lee; Zhang, Etuan

    2012-06-05T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. Methods for treating a tar sands may include heating a portion of a hydrocarbon layer in the formation from one or more heaters located in the portion. The heat may be controlled to increase the permeability of at least part of the portion to create an injection zone in the portion with an average permeability sufficient to allow injection of a fluid through the injection zone. A drive fluid and/or an oxidizing fluid may be provided into the injection zone. At least some hydrocarbons including mobilized hydrocarbons are produced from the portion.

  11. Induction heaters used to heat subsurface formations

    DOE Patents [OSTI]

    Nguyen, Scott Vinh (Houston, TX); Bass, Ronald M. (Houston, TX)

    2012-04-24T23:59:59.000Z

    A heating system for a subsurface formation includes an elongated electrical conductor located in the subsurface formation. The electrical conductor extends between at least a first electrical contact and a second electrical contact. A ferromagnetic conductor at least partially surrounds and at least partially extends lengthwise around the electrical conductor. The electrical conductor, when energized with time-varying electrical current, induces sufficient electrical current flow in the ferromagnetic conductor such that the ferromagnetic conductor resistively heats to a temperature of at least about 300.degree. C.

  12. Effects of photochemical formation of mercuric oxide

    SciTech Connect (OSTI)

    Granite, E.J.; Pennline, H.W.; Hoffman, J.S.

    1999-12-01T23:59:59.000Z

    The photochemistry of elemental mercury and oxygen was examined using quartz flow reactors. Germicidal bulbs were used as the source of 253.7-nm ultraviolet radiation. The formation of mercuric oxide, as visually detected by yellow-brown stains on the quartz walls, was confirmed by both ICP-AES and SEM-EDX analyses. In addition, a high surface area calcium silicate sorbent was used to capture the mercuric oxide in one of the experiments. The implications of mercuric oxide formation with respect to analysis of gases for mercury content, atmospheric reactions, and direct ultraviolet irradiation of flue gas for mercury sequestration are discussed.

  13. Aromatics oxidation and soot formation in flames

    SciTech Connect (OSTI)

    Howard, J.B.; Pope, C.J.; Shandross, R.A.; Yadav, T. [Massachusetts Institute of Technology, Cambridge (United States)

    1993-12-01T23:59:59.000Z

    This project is concerned with the kinetics and mechanisms of aromatics oxidation and soot and fullerenes formation in flames. The scope includes detailed measurements of profiles of stable and radical species concentrations in low-pressure one-dimensional premixed flames. Intermediate species identifications and mole fractions, fluxes, and net reaction rates calculated from the measured profiles are used to test postulated reaction mechanisms. Particular objectives are to identify and to determine or confirm rate constants for the main benzene oxidation reactions in flames, and to characterize fullerenes and their formation mechanisms and kinetics.

  14. Creating fluid injectivity in tar sands formations

    DOE Patents [OSTI]

    Stegemeier, George Leo; Beer, Gary Lee; Zhang, Etuan

    2010-06-08T23:59:59.000Z

    Methods for treating a tar sands formation are described herein. Methods for treating a tar sands may include heating a portion of a hydrocarbon layer in the formation from one or more heaters located in the portion. The heat may be controlled to increase the permeability of at least part of the portion to create an injection zone in the portion with an average permeability sufficient to allow injection of a fluid through the injection zone. A drive fluid and/or an oxidizing fluid may be provided into the injection zone. At least some hydrocarbons are produced from the portion.

  15. On star formation rate and turbulent dissipation in galactic models

    E-Print Network [OSTI]

    E. P. Kurbatov

    2007-12-10T23:59:59.000Z

    The models of star formation function and of dissipation of turbulent energy of interstellar medium are proposed. In star formation model the feedback of supernovae is taken into account. It is shown that hierarchical scenario of galaxy formation with proposed models is able to explain the observable star formation pause in the Galaxy.

  16. Power systems utilizing the heat of produced formation fluid

    DOE Patents [OSTI]

    Lambirth, Gene Richard (Houston, TX)

    2011-01-11T23:59:59.000Z

    Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method includes treating a hydrocarbon containing formation. The method may include providing heat to the formation; producing heated fluid from the formation; and generating electricity from at least a portion of the heated fluid using a Kalina cycle.

  17. Evidence for <mi>?> <mi>c> ( 2 <mi>S> ) in <mi>?> ( 3686 ) ? <mi>?> <mi>K> <mi>S> 0 <mi>K> ± <mi>?> ? <mi>?> + <mi>?> ?

    SciTech Connect (OSTI)

    Ablikim, M.; Achasov, M. N.; Albayrak, O.; Ambrose, D. J.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; Ban, Y.; Becker, J.; Bennett, J. V.; Bertani, M.; Bian, J. M.; Boger, E.; Bondarenko, O.; Boyko, I.; Briere, R. A.; Bytev, V.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S. J.; Chen, X.; Chen, Y. B.; Cheng, H. P.; Chu, Y. P.; Cronin-Hennessy, D.; Dai, H. L.; Dai, J. P.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Ding, W. M.; Ding, Y.; Dong, L. Y.; Dong, M. Y.; Du, S. X.; Fang, J.; Fang, S. S.; Fava, L.; Feng, C. Q.; Friedel, P.; Fu, C. D.; Fu, J. L.; Gao, Y.; Geng, C.; Goetzen, K.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, T.; Guo, Y. P.; Han, Y. L.; Harris, F. A.; He, K. L.; He, M.; He, Z. Y.; Held, T.; Heng, Y. K.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, J. F.; Hu, T.; Huang, G. M.; Huang, G. S.; Huang, J. S.; Huang, L.; Huang, X. T.; Huang, Y.; Huang, Y. P.; Hussain, T.; Ji, C. S.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. L.; Jiang, X. S.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Jing, F. F.; Kalantar-Nayestanaki, N.; Kavatsyuk, M.; Kopf, B.; Kornicer, M.; Kuehn, W.; Lai, W.; Lange, J. S.; Leyhe, M.; Li, C. H.; Li, Cheng; Li, Cui; Li, D. M.; Li, F.; Li, G.; Li, H. B.; Li, J. C.; Li, K.; Li, Lei; Li, Q. J.; Li, S. L.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, X. R.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Liao, X. T.; Lin, D.; Liu, B. J.; Liu, C. L.; Liu, C. X.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H.; Liu, H. B.; Liu, H. H.; Liu, H. M.; Liu, H. W.; Liu, J. P.; Liu, K.; Liu, K. Y.; Liu, Kai; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Z. A.; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H.; Lu, G. R.; Lu, H. J.; Lu, J. G.; Lu, Q. W.; Lu, X. R.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lv, M.; Ma, C. L.; Ma, F. C.; Ma, H. L.; Ma, Q. M.; Ma, S.; Ma, T.; Ma, X. Y.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Messchendorp, J. G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Morales Morales, C.; Muchnoi, N. Yu.; Muramatsu, H.; Nefedov, Y.; Nicholson, C.; Nikolaev, I. B.; Ning, Z.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Park, J. W.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Ping, J. L.; Ping, R. G.; Poling, R.; Prencipe, E.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, L. Q.; Qin, X. S.; Qin, Y.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Rong, G.; Ruan, X. D.; Sarantsev, A.; Schaefer, B. D.; Shao, M.; Shen, C. P.; Shen, X. Y.; Sheng, H. Y.; Shepherd, M. R.; Song, X. Y.; Spataro, S.; Spruck, B.; Sun, D. H.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Toth, D.; Ullrich, M.; Uman, I. U.; Varner, G. S.; Wang, B. Q.; Wang, D.; Wang, D. Y.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, Q. J.; Wang, S. G.; Wang, X. F.; Wang, X. L.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. Y.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, Q. G.; Wen, S. P.; Werner, M.; Wiedner, U.; Wu, L. H.; Wu, N.; Wu, S. X.; Wu, W.; Wu, Z.; Xia, L. G.; Xia, Y. X.; Xiao, Z. J.; Xie, Y. G.; Xiu, Q. L.; Xu, G. F.; Xu, G. M.; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Xu, Z. R.; Xue, F.; Xue, Z.; Yan, L.; Yan, W. B.; Yan, Y. H.; Yang, H. X.; Yang, Y.; Yang, Y. X.; Ye, H.; Ye, M.; Ye, M. H.; Yu, B. X.; Yu, C. X.; Yu, H. W.; Yu, J. S.; Yu, S. P.; Yuan, C. Z.; Yuan, Y.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, LiLi; Zhang, R.; Zhang, S. H.; Zhang, X. J.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhang, Zhenghao; Zhao, G.; Zhao, H. S.; Zhao, J. W.; Zhao, K. X.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. Z.; Zhao, S. J.; Zhao, T. C.; Zhao, X. H.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, Y. H.; Zhong, B.; Zhong, Z.; Zhou, L.; Zhou, X.; Zhou, X. K.; Zhou, X. R.; Zhu, C.; Zhu, K.; Zhu, K. J.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. M.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zou, B. S.; Zou, J. H.

    2013-03-01T23:59:59.000Z

    We search for the M1 radiative transition ?(3686)???c(2S) by reconstructing the exclusive ?c(2S)?K?SK±?????? decay using 1.06×10? ?(3686) events collected with the BESIII detector. The signal is observed with a statistical significance of greater than 4 standard deviations. The measured mass of the ?c(2S) is 3646.9±1.6(stat)±3.6(syst) MeV/c², and the width is 9.9±4.8(stat)±2.9(syst) MeV/c². The product branching fraction is measured to be B(?(3686)???c(2S))×B(?c(2S)?K0SK±??????)=(7.03±2.10(stat)±0.70(syst))×10??. This measurement complements a previous BESIII measurement of ?(3686)???c(2S) with ?c(2S)?K?SK±?? and K?K???.

  18. Varying heating in dawsonite zones in hydrocarbon containing formations

    SciTech Connect (OSTI)

    Vinegar, Harold J. (Bellaire, TX); Xie, Xueying (Houston, TX); Miller, David Scott (Katy, TX)

    2009-07-07T23:59:59.000Z

    A method for treating an oil shale formation comprising dawsonite includes assessing a dawsonite composition of one or more zones in the formation. Heat from one or more heaters is provided to the formation such that different amounts of heat are provided to zones with different dawsonite compositions. The provided heat is allowed to transfer from the heaters to the formation. Fluids are produced from the formation.

  19. Format: A4_20070715 Press Release

    E-Print Network [OSTI]

    de Weck, Olivier L.

    delivery, global warming. Over the 20 year history of INCOSE Systems Engineering has developed and matured and valued for projects of all sizes and at all levels of problem solving from providing integrated to enabling holistic solutions to global challenges. INCOSE has grown significantly since its formation

  20. Formation of magnetic discontinuities through viscous relaxation

    SciTech Connect (OSTI)

    Kumar, Sanjay; Bhattacharyya, R. [Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur-313001 (India); Smolarkiewicz, P. K. [European Centre for Medium-Range Weather Forecasts, Reading RG2 9AX (United Kingdom)

    2014-05-15T23:59:59.000Z

    According to Parker's magnetostatic theorem, tangential discontinuities in magnetic field, or current sheets (CSs), are generally unavoidable in an equilibrium magnetofluid with infinite electrical conductivity and complex magnetic topology. These CSs are due to a failure of a magnetic field in achieving force-balance everywhere and preserving its topology while remaining in a spatially continuous state. A recent work [Kumar, Bhattacharyya, and Smolarkiewicz, Phys. Plasmas 20, 112903 (2013)] demonstrated this CS formation utilizing numerical simulations in terms of the vector magnetic field. The magnetohydrodynamic simulations presented here complement the above work by demonstrating CS formation by employing a novel approach of describing the magnetofluid evolution in terms of magnetic flux surfaces instead of the vector magnetic field. The magnetic flux surfaces being the possible sites on which CSs develop, this approach provides a direct visualization of the CS formation, helpful in understanding the governing dynamics. The simulations confirm development of tangential discontinuities through a favorable contortion of magnetic flux surfaces, as the magnetofluid undergoes a topology-preserving viscous relaxation from an initial non-equilibrium state with twisted magnetic field. A crucial finding of this work is in its demonstration of CS formation at spatial locations away from the magnetic nulls.

  1. Dynamics of Primordial Black Hole Formation

    E-Print Network [OSTI]

    J. C. Niemeyer; K. Jedamzik

    1999-01-21T23:59:59.000Z

    We present a numerical investigation of the gravitational collapse of horizon-size density fluctuations to primordial black holes (PBHs) during the radiation-dominated phase of the Early Universe. The collapse dynamics of three different families of initial perturbation shapes, imposed at the time of horizon crossing, is computed. The perturbation threshold for black hole formation, needed for estimations of the cosmological PBH mass function, is found to be $\\delta_{\\rm c} \\approx 0.7$ rather than the generally employed $\\delta_{\\rm c} \\approx 1/3$, if $\\delta$ is defined as $\\Delta M/\\mh$, the relative excess mass within the initial horizon volume. In order to study the accretion onto the newly formed black holes, we use a numerical scheme that allows us to follow the evolution for long times after formation of the event horizon. In general, small black holes (compared to the horizon mass at the onset of the collapse) give rise to a fluid bounce that effectively shuts off accretion onto the black hole, while large ones do not. In both cases, the growth of the black hole mass owing to accretion is insignificant. Furthermore, the scaling of black hole mass with distance from the formation threshold, known to occur in near-critical gravitational collapse, is demonstrated to apply to primordial black hole formation.

  2. Star Formation Histories in the Local Group

    E-Print Network [OSTI]

    Thomas M. Brown

    2004-07-09T23:59:59.000Z

    Deep color magnitude diagrams extending to the main sequence provide the most direct measure of the detailed star formation history in a stellar population. With large investments of observing time, HST can obtain such data for populations out to 1 Mpc, but its field of view is extremely small in comparison to the size of Local Group galaxies. This limitation severely constrains our understanding of galaxy formation. For example, the largest galaxy in the Local Group, Andromeda, offers an ideal laboratory for studying the formation of large spiral galaxies, but the galaxy shows substructure on a variety of scales, presumably due to its violent merger history. Within its remaining lifetime, HST can only sample a few sight-lines through this complex galaxy. In contrast, a wide field imager could provide a map of Andromeda's halo, outer disk, and tidal streams, revealing the spatially-dependent star formation history in each structure. The same data would enable many secondary studies, such as the age variation in Andromeda's globular cluster system, gigantic samples of variable stars, and microlensing tracers of the galaxy's dark matter distribution.

  3. Full Additivity of the Entanglement of Formation

    E-Print Network [OSTI]

    Gerardo A. Paz-Silva; John H. Reina

    2010-09-01T23:59:59.000Z

    We present a general strategy that allows a more flexible method for the construction of fully additive multipartite entanglement monotones than the ones so far reported in the literature of axiomatic entanglement measures. Within this framework we give a proof of a conjecture of outstanding implications in information theory: the full additivity of the Entanglement of Formation.

  4. Facult de Sant Publique Formation continue

    E-Print Network [OSTI]

    Nesterov, Yurii

    Faculté de Santé Publique Formation continue en management des institutions de soins Programme 2011, management stratégique (UCL, ULB) CIPS p.16 > Certificat interuniversitaire en management de la qualité dans) p.19 > Certificat interuniversitaire en management médical (ULB, UCL) CIMM p.19 > Certificat

  5. MODELING OF ALUMINUM NANOPARTICLE FORMATION R. Schefflan

    E-Print Network [OSTI]

    MODELING OF ALUMINUM NANOPARTICLE FORMATION R. Schefflan D. Kalyon S. Kovenklioglu Stevens Picatinny Arsenal's process for making alumina coated nanoparticles of aluminum involves the conversion of gaseous aluminum, in the presence of helium carrier gas, to solid nanoparticles and their subsequent

  6. Daimler Chrysler Auburn Hills, MI

    E-Print Network [OSTI]

    Papalambros, Panos

    Sponsored by: Automotive Research Center National Automotive Center (NAC) U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC) U.S. Army Tank-Automotive and Armaments Command (TACOM in ground vehicle simulation. It will present the results of ARC research to university, industry

  7. US ENC MI Site Consumption

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocks Nov-14TotalThe Outlook269,023Year69,023US Virgin

  8. IMPACTS OF BIOFILM FORMATION ON CELLULOSE FERMENTATION

    SciTech Connect (OSTI)

    Leschine, Susan

    2009-10-31T23:59:59.000Z

    This project addressed four major areas of investigation: i) characterization of formation of Cellulomonas uda biofilms on cellulose; ii) characterization of Clostridium phytofermentans biofilm development; colonization of cellulose and its regulation; iii) characterization of Thermobifida fusca biofilm development; colonization of cellulose and its regulation; and iii) description of the architecture of mature C. uda, C. phytofermentans, and T. fusca biofilms. This research is aimed at advancing understanding of biofilm formation and other complex processes involved in the degradation of the abundant cellulosic biomass, and the biology of the microbes involved. Information obtained from these studies is invaluable in the development of practical applications, such as the single-step bioconversion of cellulose-containing residues to fuels and other bioproducts. Our results have clearly shown that cellulose-decomposing microbes rapidly colonize cellulose and form complex structures typical of biofilms. Furthermore, our observations suggest that, as cells multiply on nutritive surfaces during biofilms formation, dramatic cell morphological changes occur. We speculated that morphological changes, which involve a transition from rod-shaped cells to more rounded forms, might be more apparent in a filamentous microbe. In order to test this hypothesis, we included in our research a study of biofilm formation by T. fusca, a thermophilic cellulolytic actinomycete commonly found in compost. The cellulase system of T. fusca has been extensively detailed through the work of David Wilson and colleagues at Cornell, and also, genome sequence of a T. fusca strain has been determine by the DOE Joint Genome Institute. Thus, T. fusca is an excellent subject for studies of biofilm development and its potential impacts on cellulose degradation. We also completed a study of the chitinase system of C. uda. This work provided essential background information for understanding how C. uda colonizes and degrades insoluble substrates. Major accomplishments of the project include: • Development of media containing dialysis tubing (described by the manufacturer as “regenerated cellulose”) as sole carbon and energy source and a nutritive surface for the growth of cellulolytic bacteria, and development of various microscopic methods to image biofilms on dialysis tubing. • Demonstration that cultures of C. phytofermentans, an obligate anaerobe, C. uda, a facultative aerobe, and T. fusca, a filamentous aerobe, formed microbial communities on the surface of dialysis tubing, which possessed architectural features and functional characteristics typical of biofilms. • Demonstration that biofilm formation on the nutritive surface, cellulose, involves a complex developmental processes, including colonization of dialysis tubing, formation of cell clusters attached to the nutritive surface, cell morphological changes, formation of complex structures embedded in extracellular polymeric matrices, and dispersal of biofilm communities as the nutritive surface is degraded. • Determination of surface specificity and regulatory aspects of biofilm formation by C. phytofermentans, C. uda, and T. fusca. • Demonstration that biofilm formation by T. fusca forms an integral part of the life cycle of this filamentous cellulolytic bacterium, including studies on the role of mycelial pellet formation in the T. fusca life cycle and a comparison of mycelial pellets to surface-attached T. fusca biofilms. • Characterization of T. fusca biofilm EPS, including demonstration of a functional role for EPS constituents. • Correlation of T. fusca developmental life cycle and cellulase gene expression.

  9. (Non) formation of methanol by direct hydrogenation of formate on copper catalysts

    SciTech Connect (OSTI)

    Yang, Yong; Mims, Charles A.; Disselkamp, Robert S.; Kwak, Ja Hun; Peden, Charles HF; Campbell, C. T.

    2010-10-14T23:59:59.000Z

    We have attempted to hydrogenate adsorbed formate species on copper catalysts to probe the importance of this postulated mechanistic step in methanol synthesis. Surface formate coverages up to 0.25 were produced at temperatures between 413K and 453K on supported (Cu/SiO2) copper and unsupported copper catalysts. The adlayers were produced by various methods including (1) steady state catalytic conditions in CO2-H2 (3:1, 6 bar) atmospheres, and (2) by exposure of the catalysts to formic acid. As reported in earlier work, the catalytic surface at steady state contains bidentate formate species with coverages up to saturation levels of ~ 0.25 at the low temperatures of this study. The reactivity of these formate adlayers was investigated at relevant reaction temperatures in atmospheres containing up to 6 bar H2 partial pressure by simultaneous mass spectrometry (MS) and infrared (IR) spectroscopy measurements. The yield of methanol during the attempted hydrogenation (“titration”) of these adlayers was insignificant (<0.2 mol % of the formate adlayer) even in dry hydrogen partial pressures up to 6 bar. Hydrogen titration of formate species produced from formic acid also failed to produce significant quantities of methanol, and attempted titration in gases consisting of CO-hydrogen mixtures or dry CO2 were also unproductive. The formate decomposition kinetics, measured by IR, were also unaffected by these changes in the gas composition. Similar experiments on unsupported copper also failed to show any methanol. From these results, we conclude that methanol synthesis on copper cannot result from the direct hydrogenation of (bidentate) formate species in simple steps involving adsorbed H species alone. Furthermore, experiments performed on both supported (Cu/SiO2) and unsupported copper catalysts gave similar results implying that the methanol synthesis reaction mechanism only involves metal surface chemistry. Pre-exposure of the bidentate formate adlayer to oxidation by O2 or N2O produces a change to a monodentate configuration. Attempted titration of this monodentate formate/O coadsorbed layer in dry hydrogen produces significant quantities of methanol, although decomposition of formate to carbon dioxide and hydrogen remains the dominant reaction pathway. Simultaneous production of water is also observed during this titration as the copper surface is re-reduced. These results indicate that co-adsorbates related to surface oxygen or water-derived species may be critical to methanol production on copper, perhaps assisting in the hydrogenation of adsorbed formate to adsorbed methoxyl.

  10. Interpretations and implications of the top quark rapidity asymmetries <mi>A> <mi>FB> <mi>t> and <mi>A> <mi>FB> <mi>?>

    SciTech Connect (OSTI)

    Berger, Edmond L.; Cao, Qing-Hong; Chen, Chuan-Ren; Zhang, Hao

    2013-07-01T23:59:59.000Z

    Forward-backward asymmetries AtFB and AlFB are observed in the top-quark t rapidity distribution and in the rapidity distribution of charged leptons l from top-quark decay at the Tevatron proton-antiproton collider, and a charge asymmetry AC is seen in proton-proton collisions at the Large Hadron Collider (LHC). In this paper, we update our previous studies of the Tevatron asymmetries using the most recent data. We provide expectations for AC at the LHC based first on simple extrapolations from the Tevatron, and second based on new physics models that can explain the Tevatron asymmetries. We examine the relationship of the two asymmetries AtFB and AlFB. We show their connection through the (V–A) spin correlation between the charged lepton and the top quark with different polarization states. We show that the ratio of the two asymmetries provides independent insight into the physics interpretation of the top-quark asymmetry. We emphasize the value of the measurement of both asymmetries, and we conclude that a model which produces more right-handed than left-handed top quarks is suggested by the present Tevatron data.

  11. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI

    SciTech Connect (OSTI)

    James R. Wood; W. Quinlan

    2003-01-01T23:59:59.000Z

    Presented in this quarterly report is the Case History and Well Summary for the Vernon Field demonstration project in Isabella County, Michigan. This new case history and well summary format organizes and presents the technical and historical details of the Vernon Field demonstration, as well as the field demonstration results and the applicability of these results to other demonstration projects. This format could be duplicated for other demonstration projects and will be used on all subsequent field demonstrations as they near completion. Planning for the annual project meeting in Tampa, Florida has begun. This meeting will be held March 7-9, 2003 at the same site as the last three meetings. The goals of this project were to: (1) test the use of multi-lateral wells to recover bypassed hydrocarbons and (2) to access the potential of using surface geochemistry to reduce drilling risk. Two new demonstration wells, the State-Smock and the Bowers 4-25, were drilled to test the Dundee Formation at Vernon Field for bypassed oil. Neither well was commercial, although both produced hydrocarbon shows. An extensive geochemical survey in the vicinity of Vernon Field, covering much of Isabella County, has produced a base map for interpretation of anomalies in Michigan. Several potential new anomalies were discovered that could be further investigated.

  12. Production from multiple zones of a tar sands formation

    DOE Patents [OSTI]

    Karanikas, John Michael; Vinegar, Harold J

    2013-02-26T23:59:59.000Z

    A method for treating a tar sands formation includes providing heat to at least part of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. The heat is allowed to transfer from the heaters to at least a portion of the formation. Fluids are produced from the formation through at least one production well that is located in at least two zones in the formation. The first zone has an initial permeability of at least 1 darcy. The second zone has an initial of at most 0.1 darcy. The two zones are separated by a substantially impermeable barrier.

  13. Stratified chaos in a sand pile formation

    E-Print Network [OSTI]

    Ate Poortinga; Jan G. Wesseling; Coen J. Ritsema

    2014-03-04T23:59:59.000Z

    Sand pile formation is often used to describe stratified chaos in dynamic systems due to self-emergent and scale invariant behaviour. Cellular automata (Bak-Tang-Wiesenfeld model) are often used to describe chaotic behaviour, as simulating physical interactions between individual particles is computationally demanding. In this study, we use a state-of-the-art parallel implementation of the discrete element method on the graphical processing unit to simulate sand pile formation. Interactions between individual grains were simulated using a contact model in an Euler integration scheme. Results show non-linear self-emergent behaviour which is in good agreement with experimental results, theoretical work and self organized criticality (SOC) approaches. Moreover, it was found that the fully deterministic model, where the position and forces on every individual particle can be determined every iteration has a brown noise signal in the x and y direction, where the signal is the z direction is closer to a white noise spectrum.

  14. K-Basin gel formation studies

    SciTech Connect (OSTI)

    Beck, M.A.

    1998-07-23T23:59:59.000Z

    A key part of the proposed waste treatment for K Basin sludge is the elimination of reactive uranium metal by dissolution in nitric acid (Fkirnent, 1998). It has been found (Delegard, 1998a) that upon nitric acid dissolution of the sludge, a gel sometimes forms. Gels are known to sometimes impair solid/liquid separation and/or material transfer. The purpose of the work reported here is to determine the cause(s) of the gel formation and to determine operating parameters for the sludge dissolution that avoid formation of gel. This work and related work were planned in (Fkunent, 1998), (Jewett, 1998) and (Beck, 1998a). This report describes the results of the tests in (Beck, 1998a) with non-radioactive surrogates.

  15. Reconstructing the Star Formation Histories of Galaxies

    E-Print Network [OSTI]

    Uta Fritze; Thomas Lilly

    2007-01-15T23:59:59.000Z

    We present a methodological study to find out how far back and to what precision star formation histories of galaxies can be reconstructed from CMDs, from integrated spectra and Lick indices, and from integrated multi-band photometry. Our evolutionary synthesis models GALEV allow to describe the evolution of galaxies in terms of all three approaches and we have assumed typical observational uncertainties for each of them and then investigated to what extent and accuracy different star formation histories can be discriminated. For a field in the LMC bar region with both a deep CMD from HST observations and a trailing slit spectrum across exactly the same field of view we could test our modelling results against real data.

  16. Drill-in fluids control formation damage

    SciTech Connect (OSTI)

    Halliday, W.S. (Baker Hughes Inteq, Houston, TX (United States))

    1994-12-01T23:59:59.000Z

    Several factors led to development, oil company interest in, and use of payzone drilling fluids, including operator concern about maximizing well production, increasing acceptance of horizontal drilling and openhole completion popularity. This article discusses water-base drill-in'' fluid systems and applications. Payzone damage, including fine solids migration, clay swelling and solids invasion, reduces effective formation permeability, which results in lower production rates. Formation damage is often caused by invasion of normal drilling fluids that contain barite or bentonite. Drill-in systems are designed with special bridging agents to minimize invasion. Several bridging materials designed to form effective filter cake for instantaneous leak-off control can be used. Bridging materials are also designed to minimize stages and time required to clean up wells before production. Fluids with easy-to-remove bridging agents reduce completion costs. Drill-in fluid bridging particles can often be removed more thoroughly than those in standard fluids.

  17. Low voltage arc formation in railguns

    DOE Patents [OSTI]

    Hawke, R.S.

    1987-11-17T23:59:59.000Z

    A low voltage plasma arc is first established across the rails behind the projectile by switching a low voltage high current source across the rails to establish a plasma arc by vaporizing a fuse mounted on the back of the projectile, maintaining the voltage across the rails below the railgun breakdown voltage to prevent arc formation ahead of the projectile. After the plasma arc has been formed behind the projectile a discriminator switches the full energy bank across the rails to accelerate the projectile. A gas gun injector may be utilized to inject a projectile into the breech of a railgun. The invention permits the use of a gas gun or gun powder injector and an evacuated barrel without the risk of spurious arc formation in front of the projectile. 2 figs.

  18. Low voltage arc formation in railguns

    DOE Patents [OSTI]

    Hawke, Ronald S. (Livermore, CA)

    1987-01-01T23:59:59.000Z

    A low voltage plasma arc is first established across the rails behind the projectile by switching a low voltage high current source across the rails to establish a plasma arc by vaporizing a fuse mounted on the back of the projectile, maintaining the voltage across the rails below the railgun breakdown voltage to prevent arc formation ahead of the projectile. After the plasma arc has been formed behind the projectile a discriminator switches the full energy bank across the rails to accelerate the projectile. A gas gun injector may be utilized to inject a projectile into the breech of a railgun. The invention permits the use of a gas gun or gun powder injector and an evacuated barrel without the risk of spurious arc formation in front of the projectile.

  19. Low voltage arc formation in railguns

    DOE Patents [OSTI]

    Hawke, R.S.

    1985-08-05T23:59:59.000Z

    A low voltage plasma arc is first established across the rails behind the projectile by switching a low voltage high current source across the rails to establish a plasma arc by vaporizing a fuse mounted on the back of the projectile, maintaining the voltage across the rails below the railgun breakdown voltage to prevent arc formation ahead of the projectile. After the plasma arc has been formed behind the projectile a discriminator switches the full energy bank across the rails to accelerate the projectile. A gas gun injector may be utilized to inject a projectile into the breech of a railgun. The invention permits the use of a gas gun or gun powder injector and an evacuated barrel without the risk of spurious arc formation in front of the projectile.

  20. Bubble formation in Rangely Field, Colorado

    E-Print Network [OSTI]

    Wood, J. W

    1953-01-01T23:59:59.000Z

    tc Determine the Effect of Times Of. Standing on Time &equired for Bubble Formation at 67 psi Supersaturaticns. Page 20 Tests to Determine Bubble Frequency. Average Bubble Frequency Data. 23 27 The data reported in this thesis deal... if present, or would tend to form one. However, as the pressure on the saturated oil declines, the oil becomes supersatur- ated, except as bubbles may form and diffusion take place tc eliminate the supersaturation. This research is devoted to a study...

  1. Dynamical Constraints on Disk Galaxy Formation

    E-Print Network [OSTI]

    Stacy McGaugh

    1999-09-27T23:59:59.000Z

    The rotation curves of disk galaxies exhibit a number of striking regularities. The amplitude of the rotation is correlated with luminosity (Tully-Fisher), the shape of the rotation curve is well predicted by the luminous mass distribution, and the magnitude of the mass discrepancy increases systematically with decreasing centripetal acceleration. These properties indicate a tight connection between light and mass, and impose strong constraints on theories of galaxy formation.

  2. Physical regimes for feedback in galaxy formation

    E-Print Network [OSTI]

    P. Monaco

    2004-04-13T23:59:59.000Z

    We present a new (semi-)analytic model for feedback in galaxy formation. The ISM is modeled as a two-phase medium in pressure equilibrium. The remnants of exploding type II SNe percolate into super-bubbles (SBs) that sweep the ISM, heating the hot phase (if the SB is adiabatic) or cooling it (in the snowplow stage, when the interior gas of the SB has cooled). The resulting feedback regimes occur in well-defined regions of the space defined by vertical scale-length and surface density of the structure. When SBs blow out in the adiabatic regime, the efficiency of SNe in heating the ISM is ~5 per cent, with \\~80 per cent of the energy budget injected into the external halo, and the outcoming ISM is self-regulated to a state similar to that found in the Milky Way. Feedback is most efficient when SBs are pressure-confined in the adiabatic regime. In some significant regions of the parameter space confinement takes place in the snowplow stage; then the hot phase has a lower temperature and star formation is quicker. In some critical cases, the hot phase is strongly depleted and the cold phase percolates the whole volume, giving rise to a sudden burst of star formation. Strong galactic winds are predicted to happen only in critical cases. This model provides a starting point for constructing a realistic grid of feedback solutions to be used in galaxy formation codes. The predictive power of this model extends to many properties of the ISM, so that most parameters can be constrained by reproducing the main properties of the Milky Way. (Abridged)

  3. Carboxylic acid accelerated formation of diesters

    DOE Patents [OSTI]

    Tustin, G.C.; Dickson, T.J.

    1998-04-28T23:59:59.000Z

    This invention pertains to accelerating the rate of formation of 1,1-dicarboxylic esters from the reaction of an aldehyde with a carboxylic acid anhydride or a ketene in the presence of a non-iodide containing a strong Bronsted acid catalyst by the addition of a carboxylic acid at about one bar pressure and between about 0 and 80 C in the substantial absence of a hydrogenation or carbonylation catalyst.

  4. Galactosynthesis: Halo Histories, Star Formation, and Disks

    E-Print Network [OSTI]

    Ari Buchalter; Raul Jimenez; Marc Kamionkowski

    2000-06-01T23:59:59.000Z

    We investigate the effects of a variety of ingredients that must enter into a realistic model for disk-galaxy formation, focusing primarily on the Tully-Fisher (TF) relation and its scatter in several wavebands. Our main findings are: (a) the slope, normalization, and scatter of the TF relation across various wavebands is determined {\\em both} by halo properties and star formation in the disk; (b) TF scatter owes primarily to the spread in formation redshifts. The scatter can be measurably reduced by chemical evolution, and also in some cases by the weak anti-correlation between peak height and spin; (c) multi-wavelength constraints can be important in distinguishing between models which appear to fit the TF relation in I or K; (d) successful models seem to require that the bulk of disk formation cannot occur too early (z>2) or too late (z<0.5), and are inconsistent with high values of $\\Omega_0$; (e) a realistic model with the above ingredients can reasonably reproduce the observed z=0 TF relation in {\\em all} bands (B, R, I, and K). It can also account for the z=1 B-band TF relation and yield rough agreement with the local B and K luminosity functions and B-band surface-brightness--magnitude relation. The remarkable agreement with observations suggests that the amount of gas that is expelled or poured into a disk galaxy must be small, and that the specific angular momentum of the baryons must roughly equal that of the halo; there is little room for angular momentum transfer. In an appendix we present analytic fits to stellar-population synthesis models.

  5. Dissipation, noise and DCC domain formation

    E-Print Network [OSTI]

    A. K. Chaudhuri

    1999-08-17T23:59:59.000Z

    We investigate the effect of friction on domain formation in disoriented chiral condensate. We solve the equation of motion of the linear sigma model, in the Hartree approximation, including a friction and a white noise term. For quenched initial condition, we find that even in presence of noise and dissipation domain like structure emerges after a few fermi of evolution. Domain size as large as 5 fm can be formed.

  6. Humic substance formation during wastewater infiltration

    SciTech Connect (OSTI)

    Siegrist, R.L. (Oak Ridge National Lab., TN (United States)); Hildmann-Smed, R.; Filip, Z.K. (Bundesgesundheitsamt (BGA), Langen (Germany). Inst. fuer Wasser-, Boden- und Lufthygiene); Jenssen, P.D. (Norges Landbrukshoegskole, Aas (Norway). Centre for Soil and Environmental Research)

    1991-01-01T23:59:59.000Z

    Soil infiltration of wastewater effluents is a widely practiced method of treatment and disposal/reuse throughout the world. Renovation of the wastewater results from a wide variety of complex physicochemical and biological processes. One set of processes is speculated to involve the accumulation of organic matter by filtration and sorption followed by formation of humic substances. This humic substance formation can effect the performance of soil treatment systems by contributing to soil pore clogging and reduction in hydraulic capacity, and by yielding reactive substances and an enhancement of purification processes. While there has been a wealth of research into the nature and genesis of humic substances in terrestrial environments, there has been limited research of humic substance formation during soil infiltration of wastewater. The purpose of the research reported herein was to determine if humic substances can form under conditions typical of those present during wastewater infiltration into natural soil systems. This work was conducted during 1989 to 1990 as a collaborative effort between the Centre for Soil and Environmental Research, located in Aas, Norway and the Institute for Water, Soil and Air Hygiene located in Langen, West Germany. 11 refs., 3 figs., 6 tabs.

  7. Magnetic phase formation in irradiated austenitic alloys

    SciTech Connect (OSTI)

    Gussev, Maxim N [ORNL] [ORNL; Busby, Jeremy T [ORNL] [ORNL; Tan, Lizhen [ORNL] [ORNL; Garner, Francis A. [Radiation Effects Consulting, Richland, WA] [Radiation Effects Consulting, Richland, WA

    2014-01-01T23:59:59.000Z

    Austenitic alloys are often observed to develop magnetic properties during irradiation, possibly associated with radiation-induced acceleration of the ferrite phase. Some of the parametric sensitivities of this phenomenon have been addressed using a series of alloys irradiated in the BOR-60 reactor at 593K. The rate of development of magnetic phase appears to be sensitive to alloy composition. To the first order, the largest sensitivities to accelerate ferrite formation, as explored in this experiment, are associated with silicon, carbon and manganese and chromium. Si, C, and Mn are thought to influence diffusion rates of point defects while Cr plays a prominent role in defining the chromium equivalent and therefore the amount of ferrite at equilibrium. Pre-irradiation cold working was found to accelerate ferrite formation, but it can play many roles including an effect on diffusion, but on the basis of these results the dominant role or roles of cold-work cannot be identified. Based on the data available, ferrite formation is most probably associated with diffusion.

  8. Predictions from star formation in the multiverse

    SciTech Connect (OSTI)

    Bousso, Raphael; Leichenauer, Stefan [Center for Theoretical Physics, Department of Physics, University of California, Berkeley, California 94720-7300 (United States) and Lawrence Berkeley National Laboratory, Berkeley, California 94720-8162 (United States)

    2010-03-15T23:59:59.000Z

    We compute trivariate probability distributions in the landscape, scanning simultaneously over the cosmological constant, the primordial density contrast, and spatial curvature. We consider two different measures for regulating the divergences of eternal inflation, and three different models for observers. In one model, observers are assumed to arise in proportion to the entropy produced by stars; in the others, they arise at a fixed time (5 or 10x10{sup 9} years) after star formation. The star formation rate, which underlies all our observer models, depends sensitively on the three scanning parameters. We employ a recently developed model of star formation in the multiverse, a considerable refinement over previous treatments of the astrophysical and cosmological properties of different pocket universes. For each combination of observer model and measure, we display all single and bivariate probability distributions, both with the remaining parameter(s) held fixed and marginalized. Our results depend only weakly on the observer model but more strongly on the measure. Using the causal diamond measure, the observed parameter values (or bounds) lie within the central 2{sigma} of nearly all probability distributions we compute, and always within 3{sigma}. This success is encouraging and rather nontrivial, considering the large size and dimension of the parameter space. The causal patch measure gives similar results as long as curvature is negligible. If curvature dominates, the causal patch leads to a novel runaway: it prefers a negative value of the cosmological constant, with the smallest magnitude available in the landscape.

  9. Predictions from Star Formation in the Multiverse

    E-Print Network [OSTI]

    Raphael Bousso; Stefan Leichenauer

    2009-07-28T23:59:59.000Z

    We compute trivariate probability distributions in the landscape, scanning simultaneously over the cosmological constant, the primordial density contrast, and spatial curvature. We consider two different measures for regulating the divergences of eternal inflation, and three different models for observers. In one model, observers are assumed to arise in proportion to the entropy produced by stars; in the others, they arise at a fixed time (5 or 10 billion years) after star formation. The star formation rate, which underlies all our observer models, depends sensitively on the three scanning parameters. We employ a recently developed model of star formation in the multiverse, a considerable refinement over previous treatments of the astrophysical and cosmological properties of different pocket universes. For each combination of observer model and measure, we display all single and bivariate probability distributions, both with the remaining parameter(s) held fixed, and marginalized. Our results depend only weakly on the observer model but more strongly on the measure. Using the causal diamond measure, the observed parameter values (or bounds) lie within the central $2\\sigma$ of nearly all probability distributions we compute, and always within $3\\sigma$. This success is encouraging and rather nontrivial, considering the large size and dimension of the parameter space. The causal patch measure gives similar results as long as curvature is negligible. If curvature dominates, the causal patch leads to a novel runaway: it prefers a negative value of the cosmological constant, with the smallest magnitude available in the landscape.

  10. Black hole formation in the early universe

    E-Print Network [OSTI]

    Latif, M A; Schmidt, W; Niemeyer, J

    2013-01-01T23:59:59.000Z

    Supermassive black holes with up to a $\\rm 10^{9}~M_{\\odot}$ dwell in the centers of present-day galaxies, and their presence has been confirmed at z $\\geq$ 6. Their formation at such early epochs is still an enigma. Different pathways have been suggested to assemble supermassive black holes in the first billion years after the Big Bang. Direct collapse has emerged as a highly plausible scenario to form black holes as it provides seed masses of $\\rm 10^{5}-10^{6}~M_{\\odot}$. Gravitational collapse in atomic cooling haloes with virial temperatures T$_{vir} \\geq 10^{4}$~K may lead to the formation of massive seed black holes in the presence of an intense background UV flux. Turbulence plays a central role in regulating accretion and transporting angular momentum. We present here the highest resolution cosmological large-eddy simulations to date which track the evolution of high-density regions on scales of $0.25$~AU beyond the formation of the first peak, and study the impact of subgrid-scale turbulence. The pe...

  11. The Formation History of Globular Clusters

    E-Print Network [OSTI]

    Dean E. McLaughlin

    2000-02-03T23:59:59.000Z

    The properties of old globular cluster systems in galaxy halos are used to infer quantitative constraints on aspects of generic star (cluster) formation. First, the spatial distribution of globulars in three large galaxies, together with trends in total cluster population vs. galaxy luminosity for 97 early-type systems plus the halo of the Milky Way, imply that bound stellar clusters formed with a universal efficiency throughout early protogalaxies: by mass, always 0.26% of star-forming gas was converted into globulars rather than halo field stars. That this fraction is so robust in the face of extreme variations in local and global galaxy environment suggests that any parcel of gas needs primarily to exceed a relative density threshold in order to form a bound cluster of stars. Second, it is shown that a strict, empirical scaling of total binding energy with luminosity and Galactocentric position is a defining equation for a fundamental plane of Galactic globular clusters. The characteristics of this plane, which subsumes all other observable correlations between the structural parameters of globulars, provide a small but complete set of facts that must be explained by theories of cluster formation and evolution in the Milky Way. It is suggested that the E_b(L,r_{\\rm gc}) relation specifically resulted from star formation efficiencies having been systematically higher inside more massive protoglobular gas clumps.

  12. Aromatics oxidation and soot formation in flames

    SciTech Connect (OSTI)

    Howard, J.B.; Pope, C.J.; Shandross, R.A.; Yadav, T.

    1993-04-01T23:59:59.000Z

    This project is concerned with the kinetics and mechanisms of aromatics oxidation and soot and fullerenes formation in flames. The scope includes detailed measurements of profiles of stable and radical species concentrations in low-pressure one-dimensional premixed flames. Intermediate species identifications and mole fractions, fluxes, and net reaction rates calculated from the measured profiles are used to test postulated reaction mechanisms. Particular objectives are to identify, and to confirm or determine rate constants for, the main benzene oxidation reactions in flames, and to characterize soot and fullerenes and their formation mechanisms and kinetics. Stable and radical species profiles in the aromatics oxidation study are measured using molecular beam sampling with on-line mass spectrometry. The rate of soot formation measured by conventional optical techniques is found to support the hypotheses that particle inception occurs through reactive coagulation of high molecular weight PAH in competition with destruction by OHattack, and that the subsequent growth of the soot mass occurs through addition reactions of PAH and C[sub 2]H[sub 2] with the soot particles. During the first year of this reporting period, fullerenes C[sub 60] and C[sub 70] in substantial quantities were found in the flames being studied. The fullerenes were recovered, purified and spectroscopically identified. The yields of C[sub 60] and C[sub 70] were then determined over ranges of conditions in low-pressure premixed flames of benzene and oxygen.

  13. Black holes, cuspy atmospheres, and galaxy formation

    E-Print Network [OSTI]

    James Binney

    2004-07-12T23:59:59.000Z

    In cuspy atmospheres, jets driven by supermassive black holes (BHs) offset radiative cooling. The jets fire episodically, but often enough that the cuspy atmosphere does not move very far towards a cooling catastrophe in the intervals of jet inactivity. The ability of energy released on the sub-parsec scale of the BH to balance cooling on scales of several tens of kiloparsecs arises through a combination of the temperature sensitivity of the accretion rate and the way in which the radius of jet disruption varies with ambient density. Accretion of hot gas does not significantly increase BH masses, which are determined by periods of rapid BH growth and star formation when cold gas is briefly abundant at the galactic centre. Hot gas does not accumulate in shallow potential wells. As the Universe ages, deeper wells form, and eventually hot gas accumulates. This gas soon prevents the formation of further stars, since jets powered by the BH prevent it from cooling, and it mops up most cold infalling gas before many stars can form. Thus BHs set the upper limit to the masses of galaxies. The formation of low-mass galaxies is inhibited by a combination of photo-heating and supernova-driven galactic winds. Working in tandem these mechanisms can probably explain the profound difference between the galaxy luminosity function and the mass function of dark halos expected in the cold dark matter cosmology.

  14. Defect- and Strain-enhanced Cavity Formation and Au Precipitation...

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

    Defect- and Strain-enhanced Cavity Formation and Au Precipitation at nano-crystalline ZrO2SiO2Si Interfaces . Defect- and Strain-enhanced Cavity Formation and Au Precipitation at...

  15. Simultaneous MS-IR Studies of Surface Formate Reactivity Under...

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

    MS-IR Studies of Surface Formate Reactivity Under Methanol Synthesis Conditions on CuSiO2. Simultaneous MS-IR Studies of Surface Formate Reactivity Under Methanol Synthesis...

  16. allograft neointima formation: Topics by E-print Network

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

    Bykowski; Johnny Huard, Ph.D.; Lee E. Weiss, Ph.D.; Joseph E. Losee; Phil G. Campbell, Ph.D. 26 Ateliers de formation > FORMATION EN PHOTOGRAPHIE Chemistry Websites Summary: ....

  17. Extended correlations of porosity, permeability, and formation resistivity factor

    E-Print Network [OSTI]

    Ellis, Keith Wade

    1987-01-01T23:59:59.000Z

    obtained through a literature search, and the remainder were obtained through donations by Shell and Tenneco. The complete data set consists of permeability, porosity and formation factor measurements for twenty formations. Of the twenty data sets, seven...

  18. First-principles characterization of formate and carboxyl adsorption...

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

    formate and carboxyl adsorption on the stoichiometric CeO2(111) and CeO2(110) surfaces. First-principles characterization of formate and carboxyl adsorption on the stoichiometric...

  19. FORMATION OF SEPIOLITE-PALYGORSKITE AND RELATED MINERALS FROM SOLUTION

    E-Print Network [OSTI]

    Ahmad, Sajjad

    FORMATION OF SEPIOLITE-PALYGORSKITE AND RELATED MINERALS FROM SOLUTION REZAN BIRSOY* Dokuz Eylu's sepiolite-palygorskite precipitates in lacustrine and perimarine environments. Although these minerals can transform from precursor minerals, the most common formation mechanism involves crystallization from

  20. Development of Large Format Lithium Ion Cells with Higher Energy...

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

    Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL Development of Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL 2012 DOE...

  1. FORMAT PED PHENO Software Documentation Version 1.0

    E-Print Network [OSTI]

    Das, Soma

    Box 357232 Seattle, WA 98195-7232 email: tathornt@u.washington.edu 2 #12;Contents 1 Overview of FORMAT

  2. RESEARCH PAPER Phase transition induced formation of hollow structures

    E-Print Network [OSTI]

    Ju, Yiguang

    such as stabilized nano- particles and an oxidation species are usually required to participate in the void formationRESEARCH PAPER Phase transition induced formation of hollow structures in colloidal lanthanide 2009 Ã? Springer Science+Business Media B.V. 2009 Abstract Formation of colloidal hollow structures

  3. In-situ combustion in hydrocarbon-bearing formations

    SciTech Connect (OSTI)

    Garthoffner, E.H.

    1986-10-07T23:59:59.000Z

    This patent describes a method of simulating production in a formation bearing heavy oil or tar, comprising injecting into the formation colloidal particles of metallic magnesium and causing the magnesium to be ignited, thereafter to be exothermally reacted with water in-situ, whereby exothermally to produce magnesium hydroxide and hydrogen gas in the formation.

  4. ORIGINAL ARTICLE Diatom assemblages promote ice formation in large

    E-Print Network [OSTI]

    Lee Jr., Richard E.

    ORIGINAL ARTICLE Diatom assemblages promote ice formation in large lakes NA D'souza1,3 , Y evidence for the directed formation of ice by planktonic communities dominated by filamentous diatoms sampled from the ice-covered Laurentian Great Lakes. We hypothesize that ice formation promotes attachment

  5. Mineralogical constraints on the paleoenvironments of the Ediacaran Doushantuo Formation

    E-Print Network [OSTI]

    Jiang, Ganqing

    Mineralogical constraints on the paleoenvironments of the Ediacaran Doushantuo Formation Thomas F. In this paper, the clay mineralogy of the Doushan- tuo Formation in South China is documented, providing document the clay mineralogy of the Dou- shantuo Formation with the aim of providing information about

  6. DEFORMATION OF THE HURRICANE MOUNTAIN FORMATION MELANGE ALONG TOMHEGAN AND

    E-Print Network [OSTI]

    Beane, Rachel J.

    central Maine. The Hurricane Mountain Formation is a melange with a grey sulfidic slate- to gneiss- matrix by the Dead River Formation, a silvery green slate and phyllite, and overlies the Jim Pond Formation, a dark Pond Quadrangles). Along Tomhegan Stream, northeastern foliation is observed in the grey slate matrix

  7. Heating subsurface formations by oxidizing fuel on a fuel carrier

    DOE Patents [OSTI]

    Costello, Michael; Vinegar, Harold J.

    2012-10-02T23:59:59.000Z

    A method of heating a portion of a subsurface formation includes drawing fuel on a fuel carrier through an opening formed in the formation. Oxidant is supplied to the fuel at one or more locations in the opening. The fuel is combusted with the oxidant to provide heat to the formation.

  8. Textures and conditions of formation of Middle Pennsylvanian coal balls, central United States

    E-Print Network [OSTI]

    Perkins, T. W.

    1976-04-30T23:59:59.000Z

    ball zones is given in Table 1. TABLE 1.—List of Localities Sampled. [Locations shown in Figure 1.] LOCALITY NO. ZONE AND DESCRIPTION 1 Welch Locality 1 (Mineral Coal); NW1/4 SW1/4 sec. 27, R. 20 E., T. 28 N., Craig Co., Okla.; 4.5 mi (6 km) west..., R. 20 E., T. 28 N., Craig Co., Okla.; 5 mi (7 km) northwest of Welch. Active strip pit. 4 Vinita Locality (Iron Post Coal), Peabody Coal Company. Tipple area: sec. 5, R. 18 E., T. 25 N., Craig Co., Okla. Strip pits: sec. 31, R. 18 E., T. 26 N...

  9. ATTENDANCE/MINUTES QUARTERLY CONFERENCE CALL ON SUBPART W

    E-Print Network [OSTI]

    Egidi ­ CDPHE Sarah Fields ­ Uranium Watch Zach Rogers ­ Energy Fuels Resources Corp. Scott Bakken

  10. Shale Oil and Gas, Frac Sand, and Watershed

    E-Print Network [OSTI]

    Minnesota, University of

    ;Bakken Oil Shale scope · Light, Sweet crude ­ ideal for automotive fuels and mid-size refineries (Midwest

  11. STAR FORMATION NEAR BERKELEY 59: EMBEDDED PROTOSTARS

    SciTech Connect (OSTI)

    Rosvick, J. M. [Department of Physical Sciences, Thompson Rivers University, 900 McGill Road, Kamloops, BC V2C 0C8 (Canada); Majaess, D. [Department of Astronomy and Physics, Saint Mary's University, Halifax, NS B3H 3C3 (Canada)

    2013-12-01T23:59:59.000Z

    A group of suspected protostars in a dark cloud northwest of the young (?2 Myr) cluster Berkeley 59 and two sources in a pillar south of the cluster have been studied in order to determine their evolutionary stages and ascertain whether their formation was triggered by Berkeley 59. Narrowband near-infrared observations from the Observatoire du Mont Mégantic, {sup 12}CO (J = 3-2) and SCUBA-2 (450 and 850 ?m) observations from the JCMT, 2MASS, and WISE images, and data extracted from the IPHAS survey catalog were used. Of 12 sources studied, two are Class I objects, while three others are flat/Class II, one of which is a T Tauri candidate. A weak CO outflow and two potential starless cores are present in the cloud, while the pillar possesses substructure at different velocities, with no outflows present. The CO spectra of both regions show peaks in the range v {sub LSR} = –15 to –17 km s{sup –1}, which agrees with the velocity adopted for Berkeley 59 (–15.7 km s{sup –1}), while spectral energy distribution models yield an average interstellar extinction A{sub V} and distance of 15 ± 2 mag and 830 ± 120 pc, respectively, for the cloud, and 6.9 mag and 912 pc for the pillar, indicating that the regions are in the same vicinity as Berkeley 59. The formation of the pillar source appears to have been triggered by Berkeley 59. It is unclear whether Berkeley 59 triggered the association's formation.

  12. Formation of Compact Stellar Clusters by High-Redshift Galaxy Outflows I: Nonequillibrium Coolant Formation

    E-Print Network [OSTI]

    Gray, William J

    2010-01-01T23:59:59.000Z

    We use high-resolution three-dimensional adaptive mesh refinement simulations to investigate the interaction of high-redshift galaxy outflows with low-mass virialized clouds of primordial composition. While atomic cooling allows star formation in objects with virial temperatures above $10^4$ K, "minihaloes" below this threshold are generally unable to form stars by themselves. However, these objects are highly susceptible to triggered star formation, induced by outflows from neighboring high-redshift starburst galaxies. Here we conduct a study of these interactions, focusing on cooling through non-equilibrium molecular hydrogen (H$_2$) and hydrogen deuteride (HD) formation. Tracking the non-equilibrium chemistry and cooling of 14 species and including the presence of a dissociating background, we show that shock interactions can transform minihaloes into extremely compact clusters of coeval stars. Furthermore, these clusters are all less than $\\approx 10^6 M_\\odot,$ and they are ejected from their parent dark...

  13. Globular Cluster Formation in M82

    E-Print Network [OSTI]

    S. J. Lipscy; P. Plavchan

    2003-11-12T23:59:59.000Z

    We present high resolution mid-infrared (mid-IR; 11.7 and 17.65 micron) maps of the central 400 pc region of the starburst galaxy M82. Seven star forming clusters are identified which together provide ~ 15% of the total mid-IR luminosity of the galaxy. Combining the mid-IR data with thermal radio measurements and near- and mid-IR line emission, we find that these young stellar clusters have inferred masses and sizes comparable to globular clusters. At least 20% of the star formation in M82 is found to occur in super-star clusters.

  14. Proportional structural effects of formative indicators

    E-Print Network [OSTI]

    Franke, George R.; Preacher, Kristopher J.; Rigdon, Ed E.

    2009-03-15T23:59:59.000Z

    : an application to the motion picture industry. J Acad Mark Sci 2006;34(Fall):559–75. Howell RD, Breivik E, Wilcox JB. Is formative measurement really mea- surement? Reply to Bollen (2007) and Bagozzi (2007). Psychol Methods 2007;12(December):238–45. Jarvis CB... and Winklhofer, 2001; Edwards and Bagozzi, 2000; Jarvis et al., 2003; Petter et al., 2007). Some criteria deal with constructs and indicators in isolation from other constructs. For example, reflective indicators of a unidimensional construct manifest the same...

  15. Radiation Induced Nanocrystal Formation in Metallic Glasses 

    E-Print Network [OSTI]

    Carter, Jesse

    2010-01-14T23:59:59.000Z

    simple system consisting of only two elements, several intermetallic compounds can exist, each with their own crystal structure (face-centered cubic, body-centered, etc), and the system gets much more complicated when the number of constituents... of Alloys and Compounds, Vol 431, Q.S. Zhang, W. Zhang, G.Q. Xie, K.S. Nakayama, H. Kimura and A. Inoue, Formation of bulk metallic glass in situ composites in Cu50Zr45Ti5 alloy, Pages 236-240, Copyright 2007, with permission from Elsevier. 16 Fig. 9...

  16. Solar cell contact formation using laser ablation

    DOE Patents [OSTI]

    Harley, Gabriel; Smith, David D.; Cousins, Peter John

    2014-07-22T23:59:59.000Z

    The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline materiat layer; and forming conductive contacts in the plurality of contact holes.

  17. Solar cell contact formation using laser ablation

    DOE Patents [OSTI]

    Harley, Gabriel; Smith, David; Cousins, Peter

    2012-12-04T23:59:59.000Z

    The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes.

  18. Dimensionality effects in Turing pattern formation

    E-Print Network [OSTI]

    Teemu Leppanen; Mikko Karttunen; Kimmo Kaski; Rafael A. Barrio

    2003-06-05T23:59:59.000Z

    The problem of morphogenesis and Turing instability are revisited from the point of view of dimensionality effects. First the linear analysis of a generic Turing model is elaborated to the case of multiple stationary states, which may lead the system to bistability. The difference between two- and three-dimensional pattern formation with respect to pattern selection and robustness is discussed. Preliminary results concerning the transition between quasi-two-dimensional and three-dimensional structures are presented and their relation to experimental results are addressed.

  19. Bistatic SAR: Signal Processing and Image Formation.

    SciTech Connect (OSTI)

    Wahl, Daniel E.; Yocky, David A.

    2014-10-01T23:59:59.000Z

    This report describes the significant processing steps that were used to take the raw recorded digitized signals from the bistatic synthetic aperture RADAR (SAR) hardware built for the NCNS Bistatic SAR project to a final bistatic SAR image. In general, the process steps herein are applicable to bistatic SAR signals that include the direct-path signal and the reflected signal. The steps include preprocessing steps, data extraction to for a phase history, and finally, image format. Various plots and values will be shown at most steps to illustrate the processing for a bistatic COSMO SkyMed collection gathered on June 10, 2013 on Kirtland Air Force Base, New Mexico.

  20. Communication n 219 Atelier 21 : Formation au mtier du soin En quoi l'universitarisation de la formation infirmire

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    infirmier basé sur le développement des compétences. Nous avons choisi de mettre en exergue une pratique référentiels d'activités, de compétences et de formation infirmière. Mots clés : infirmier(ère), formation conduisant au diplôme d'état d'infirmier. Le référentiel de formation a comme enjeu une autre définition du

  1. Geologic Study of the Coso Formation

    SciTech Connect (OSTI)

    D. L. Kamola; J. D. Walker

    1999-12-01T23:59:59.000Z

    There have been great advances in the last 20 years in understanding the volcanic, structural, geophysical, and petrologic development of the Coso Range and Coso geothermal field. These studies have provided a wealth of knowledge concerning the geology of the area, including general structural characteristics and kinematic history. One element missing from this dataset was an understanding of the sedimentology and stratigraphy of well-exposed Cenozoic sedimentary strata - the Coso Formation. A detailed sedimentation and tectonics study of the Coso Formation was undertaken to provide a more complete picture of the development of the Basin and Range province in this area. Detailed mapping and depositional analysis distinguishes separate northern and southern depocenters, each with its own accommodation and depositional history. While strata in both depocenters is disrupted by faults, these faults show modest displacement, and the intensity and magnitude of faulting does no t record significant extension. For this reason, the extension between the Sierran and Coso blocks is interpreted as minor in comparison to range bounding faults in adjacent areas of the Basin and Range.

  2. Colloid Formation at Waste Plume Fronts

    SciTech Connect (OSTI)

    Wan, Jiamin; Tokunaga, Tetsu K.; Saiz, Eduardo; Larsen, Joern T.; Zheng, Zuoping; Couture, Rex A.

    2004-05-22T23:59:59.000Z

    Highly saline and caustic tank waste solutions containing radionuclides and toxic metals have leaked into sediments at U. S. Department of Energy (DOE) facilities such as the Hanford Site (Washington State). Colloid transport is frequently invoked to explain migration of radionuclides and metals in the subsurface. To understand colloid formation during interactions between highly reactive fluids and sediments and its impact on contaminant transport, we simulated tank waste solution (TWS) leakage processes in laboratory columns at ambient and elevated (70 C) temperatures. We found that maximum formation of mobile colloids occurred at the plume fronts (hundreds to thousands times higher than within the plume bodies or during later leaching). Concentrations of suspended solids were as high as 3 mass%, and their particle-sizes ranged from tens of nm to a few {micro}m. Colloid chemical composition and mineralogy depended on temperature. During infiltration of the leaked high Na{sup +} waste solution, rapid and completed Na{sup +} replacement of exchangeable Ca{sup 2+} and Mg{sup 2+} from the sediment caused accumulation of these divalent cations at the moving plume front. Precipitation of supersaturated Ca{sup 2+}/Mg{sup 2+}-bearing minerals caused dramatic pH reduction at the plume front. In turn, the reduced pH caused precipitation of other minerals. This understanding can help predict the behavior of contaminant trace elements carried by the tank waste solutions, and could not have been obtained through conventional batch studies.

  3. Kinetics and morphology of erbium silicide formation

    SciTech Connect (OSTI)

    Knapp, J.A.; Picraux, S.T.; Wu, C.S.; Lau, S.S.

    1985-11-15T23:59:59.000Z

    The growth kinetics and surface morphology of erbium silicide formation from Er layers on Si(100) substrates are examined using both fast e-beam annealing and furnace annealing. Very smooth erbium silicide layers have been grown using a line-source e beam to heat and react the Er overlayers with the substrate. This contrasts to the severe pitting observed when Er layers are reacted with Si in conventional furnace annealing. The pitting phenomenon can be explained by a thin contaminant layer at the interface between Er and Si. Our results suggest the contamination barrier is not due to oxygen, as usually assumed, but may be related to the presence of carbon. Rapid e-beam heating to reaction temperatures of approx.1200 K permits dispersion of the barrier layer before substantial silicide growth can occur, allowing smooth silicide growth. Heating to shorter times to just disperse the interface barrier allows uniform layer growth by subsequent furnace annealing and has permitted measurement of the kinetics of erbium silicide formation on crystalline Si. The reaction obeys (time)/sup 1//sup ///sup 2/ kinetics but is shown to be not totally diffusion limited by the ability to sustain multiple interface growth from a single Si source. The growth rates are nearly an order of magnitude slower for the Er/Si(100) interface than for the Er/amorphous-Si, but with a similar activation energy near 1.75 eV in both cases.

  4. DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS

    SciTech Connect (OSTI)

    Kishore K. Mohanty

    2005-04-01T23:59:59.000Z

    There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Laboratory imbibition tests show about 61% oil recovery in the case of Alf-38 and 37% in the case of DTAB. A numerical model has been developed that fits the rate of imbibition of the laboratory experiment. Field-scale fracture block simulation shows that as the fracture spacing increases, so does the time of recovery. Plans for the next quarter include simulation studies.

  5. Dilute Surfactant Methods for Carbonate Formations

    SciTech Connect (OSTI)

    Kishore K. Mohanty

    2005-10-01T23:59:59.000Z

    There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the best hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Laboratory-scale surfactant brine imbibition experiments give high oil recovery (35-62% OOIP) for initially oil-wet cores through wettability alteration and IFT reduction. Core-scale simulation results match those of the experiments. Initial capillarity-driven imbibition gives way to a final gravity-driven process. As the matrix block height increases, surfactant alters wettability to a lesser degree, or permeability decreases, oil production rate decreases. The scale-up to field scale will be further studied in the next quarter.

  6. Pattern formation and propagation during microwave breakdown

    SciTech Connect (OSTI)

    Chaudhury, Bhaskar [Laboratoire Plasma et Conversion d'Energie (LAPLACE), INPT, UPS, Universite de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9 (France); Boeuf, Jean-Pierre [Laboratoire Plasma et Conversion d'Energie (LAPLACE), INPT, UPS, Universite de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9 (France); LAPLACE, CNRS, F-31062 Toulouse (France); Zhu, Guo Qiang [Laboratoire Plasma et Conversion d'Energie (LAPLACE), INPT, UPS, Universite de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9 (France); Northwestern Polytechnique University, Xi'an 710072 (China)

    2010-12-15T23:59:59.000Z

    During microwave breakdown at atmospheric pressure, a sharp plasma front forms and propagates toward the microwave source at high velocities. Experiments show that the plasma front may exhibit a complex dynamical structure or pattern composed of plasma filaments aligned with the wave electric field and apparently moving toward the source. In this paper, we present a model of the pattern formation and propagation under conditions close to recent experiments. Maxwell's equations are solved together with plasma fluid equations in two dimensions to describe the space and time evolution of the wave field and plasma density. The simulation results are in excellent agreement with the experimental observations. The model provides a physical interpretation of the pattern formation and dynamics in terms of ionization-diffusion and absorption-reflection mechanisms. The simulations allow a good qualitative and quantitative understanding of different features such as plasma front velocity, spacing between filaments, maximum plasma density in the filaments, and influence of the discharge parameters on the development of well-defined filamentary plasma arrays or more diffuse plasma fronts.

  7. On water ice formation in interstellar clouds

    E-Print Network [OSTI]

    Renaud Papoular

    2005-07-06T23:59:59.000Z

    A model is proposed for the formation of water ice mantles on grains in interstellar clouds. This occurs by direct accretion of monomers from the gas, be they formed by gas or surface reactions. The model predicts the existence of a threshold in interstellar light extinction, A(v), which is mainly determined by the adsorption energy of water molecules on the grain material; for hydrocarbon material, chemical simulation places this energy between 0.5 and 2 kcal/mole, which sets the visible exctinction threshold at a few magnitudes, as observed. Once the threshold is crossed, all available water molecules in the gas are quickly adsorbed, forming an ice mantle, because the grain cools down and the adsorption energy on ice is higher than on bare grain. The model also predicts that the thickness of the mantle, and, hence, the optical thickness at 3 mu, grow linearly with A(v), as observed, with a slope which depends upon the total amount of water in the gas. Chemical simulation was also used to determine the adsorption sites and energies of O and OH on hydrocarbons, and study the dynamics of formation of water molecules by surface reactions with gaseous H atoms, as well as their chances of sticking in situ.

  8. Magnetic Fields in Population III Star Formation

    SciTech Connect (OSTI)

    Turk, Matthew J.; Oishi, Jeffrey S.; Abel, Tom; Bryan, Greg

    2012-02-22T23:59:59.000Z

    We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting cosmological simulations from realistic initial conditions and varying the Jeans resolution. To investigate this in detail, we start simulations from identical initial conditions, mandating 16, 32 and 64 zones per Jeans length, and studied the variation in their magnetic field amplification. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions (we find this requirement to be 64 zones per Jeans length, slightly larger than, but consistent with previous work run with more idealized collapse scenarios). We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, including higher infall-velocity, increased temperatures inside 1000 AU, and decreased molecular hydrogen content in the innermost region. Furthermore, we find that disk formation is suppressed in higher-resolution calculations, at least at the times that we can follow the calculation. We discuss the effect this may have on the buildup of disks over the accretion history of the first clump to form as well as the potential for gravitational instabilities to develop and induce fragmentation.

  9. The Formation of Primordial Luminous Objects

    SciTech Connect (OSTI)

    Ripamonti, Emanuele; /Kapteyn Astron. Inst., Groningen; Abel, Tom; /KIPAC, Menlo Park

    2005-08-04T23:59:59.000Z

    The scientific belief that the universe evolves in time is one of the legacies of the theory of the Big Bang. The concept that the universe has an history started to attract the interest of cosmologists soon after the first formulation of the theory: already Gamow (1948; 1949) investigated how and when galaxies could have been formed in the context of the expanding Universe. However, the specific topic of the formation (and of the fate) of the first objects dates to two decades later, when no objects with metallicities as low as those predicted by primordial nucleosynthesis (Z {approx}< 10{sup -10} {approx} 10{sup -8}Z{sub {circle_dot}}) were found. Such concerns were addressed in two seminal papers by Peebles & Dicke (1968; hereafter PD68) and by Doroshkevich, Zel'Dovich & Novikov (1967; hereafter DZN67), introducing the idea that some objects could have formed before the stars we presently observe. (1) Both PD68 and DZN67 suggest a mass of {approx} 10{sup 5} M{sub {circle_dot}} for the first generation of bound systems, based on the considerations on the cosmological Jeans length (Gamow 1948; Peebles 1965) and the possible shape of the power spectrum. (2) They point out the role of thermal instabilities in the formation of the proto-galactic bound object, and of the cooling of the gas inside it; in particular, PD68 introduces H{sub 2} cooling and chemistry in the calculations about the contraction of the gas. (3) Even if they do not specifically address the occurrence of fragmentation, these papers make two very different assumptions: PD68 assumes that the gas will fragment into ''normal'' stars to form globular clusters, while DZN67 assumes that fragmentation does not occur, and that a single ''super-star'' forms. (4) Finally, some feedback effects as considered (e.g. Peebles & Dicke considered the effects of supernovae). Today most of the research focuses on the issues when fragmentation may occur, what objects are formed and how they influence subsequent structure formation. In these notes we will leave the discussion of feedback to lecture notes by Ferrara & Salvaterra and by Madau & Haardt in this same book and focus only on the aspects of the formation of the first objects. The advent of cosmological numerical hydrodynamics in particular allow a fresh new look at these questions. Hence, these notes will touch on aspects of theoretical cosmology to chemistry, computer science, hydrodynamics and atomic physics. For further reading and more references on the subject we refer the reader to other relevant reviews such as Barkana & Loeb 2001, and more recently Ciardi & Ferrara 2004, Glover 2004 and Bromm & Larson 2004. In these notes, we try to give a brief introduction to only the most relevant aspects. We will start with a brief overview of the relevant cosmological concepts in section 2, followed by a discussion of the properties of primordial material (with particular emphasis to its cooling and its chemistry) in section 3. We will then review the technique and the results of numerical simulations in sections 4 and 5: the former will deal with detailed 3D simulations of the formation of gaseous clouds which are likely to transform into luminous objects, while the latter will examine results (mostly from 1D codes) about the modalities of such transformation. Finally, in section 6 we will critically discuss the results of the previous sections, examining their consequences and comparing them to our present knowledge of the universe.

  10. Controls on Gas Hydrate Formation and Dissociation

    SciTech Connect (OSTI)

    Miriam Kastner; Ian MacDonald

    2006-03-03T23:59:59.000Z

    The main objectives of the project were to monitor, characterize, and quantify in situ the rates of formation and dissociation of methane hydrates at and near the seafloor in the northern Gulf of Mexico, with a focus on the Bush Hill seafloor hydrate mound; to record the linkages between physical and chemical parameters of the deposits over the course of one year, by emphasizing the response of the hydrate mound to temperature and chemical perturbations; and to document the seafloor and water column environmental impacts of hydrate formation and dissociation. For these, monitoring the dynamics of gas hydrate formation and dissociation was required. The objectives were achieved by an integrated field and laboratory scientific study, particularly by monitoring in situ formation and dissociation of the outcropping gas hydrate mound and of the associated gas-rich sediments. In addition to monitoring with the MOSQUITOs, fluid flow rates and temperature, continuously sampling in situ pore fluids for the chemistry, and imaging the hydrate mound, pore fluids from cores, peepers and gas hydrate samples from the mound were as well sampled and analyzed for chemical and isotopic compositions. In order to determine the impact of gas hydrate dissociation and/or methane venting across the seafloor on the ocean and atmosphere, the overlying seawater was sampled and thoroughly analyzed chemically and for methane C isotope ratios. At Bush hill the pore fluid chemistry varies significantly over short distances as well as within some of the specific sites monitored for 440 days, and gas venting is primarily focused. The pore fluid chemistry in the tub-warm and mussel shell fields clearly documented active gas hydrate and authigenic carbonate formation during the monitoring period. The advecting fluid is depleted in sulfate, Ca Mg, and Sr and is rich in methane; at the main vent sites the fluid is methane supersaturated, thus bubble plumes form. The subsurface hydrology exhibits both up-flow and down-flow of fluid at rates that range between 0.5 to 214 cm/yr and 2-162 cm/yr, respectively. The fluid flow system at the mound and background sites are coupled having opposite polarities that oscillate episodically between 14 days to {approx}4 months. Stability calculations suggest that despite bottom water temperature fluctuations, of up to {approx}3 C, the Bush Hill gas hydrate mound is presently stable, as also corroborated by the time-lapse video camera images that did not detect change in the gas hydrate mound. As long as methane (and other hydrocarbon) continues advecting at the observed rates the mound would remain stable. The {_}{sup 13}C-DIC data suggest that crude oil instead of methane serves as the primary electron-donor and metabolic substrate for anaerobic sulfate reduction. The oil-dominated environment at Bush Hill shields some of the methane bubbles from being oxidized both anaerobically in the sediment and aerobically in the water column. Consequently, the methane flux across the seafloor is higher at Bush hill than at non-oil rich seafloor gas hydrate regions, such as at Hydrate Ridge, Cascadia. The methane flux across the ocean/atmosphere interface is as well higher. Modeling the methane flux across this interface at three bubble plumes provides values that range from 180-2000 {_}mol/m{sup 2} day; extrapolating it over the Gulf of Mexico basin utilizing satellite data is in progress.

  11. Geochemistry of formation waters from the Lower Silurian Clinton Formation (Albion Sandstone), eastern Ohio

    SciTech Connect (OSTI)

    Sanders, L.L. (Illinois Univ., Chicago (United States))

    1991-10-01T23:59:59.000Z

    Waters of the petroleum-bearing Clinton formation (Albion Sandstone) of eastern Ohio are highly concentrated brines with average total dissolved solids (TDS) of 250,000 ppm. Sodium, calcium, and chloride account for 97% of the TDS. Distribution of divalent metal chlorides (MCl{sub 2}) allows inference of an up-dip paleoflow direction, although present-day flow is probably down-dip paleoflow direction, although present-day flow is probably down-dip. Solute distribution may have been emplaced during early basin development; it thus provides a snapshot of paleoflow. Formation structure alone can not explain MCl{sub 2} trends; they probably also are controlled by regional variation in salt thickness. Major constituent data do not indicate that membrane filtration affected the waters. High bromide content (mean = 1,860 ppm) of the water indicates that they originated from evaporating seawater. They probably are related genetically to the Salina evaporite group. Calculations show that several subsequent diagenetic reactions can account for the observed major ion composition. Recrystallization of aragonite and dolomitization of calcite probably occurred as the waters moved through the big Lime and/or the Packer Shell carbonates. Cation exchange and chlorite formation probably altered water composition during interaction with shales of the Cabot Head formation and within the Clinton. Minor constituents of the waters appear to be controlled by reactions with clays.

  12. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI.

    SciTech Connect (OSTI)

    James R. Wood; T.J. Bornhorst; S.D. Chittick; William B. Harrison; W. Quinlan

    2002-01-01T23:59:59.000Z

    In this reporting period, we extended the fault study to include more faults and developed new techniques to visualize the faults. We now have used data from the Dundee Formation to document 11 major faults in the Michigan Basin and are in the process of reviewing data from other horizons. These faults appear to control the locations of many of the large anticlinal structures in the Michigan Basin and likely controlled fluid movements as well. The surface geochemistry program is also moving along well with emphasis on measuring samples collected last sampling season. The new laboratory is now functional and has been fully staffed as of December. The annual project review has been set for March 7-9 in Tampa, Florida. Contracts are being prepared for drilling the Bower's prospects in Isabella County, Michigan, this spring or summer.

  13. 323. 1JYNJ;MI(S AND 00!ANTIM3 CF OOGINIC rouJJI'ANl' lNll'RICITrns (}l GAY MINERAlS. Z.Z. 2'bang. Penchu 2'bang and D.L. Sjmks. l:epart:lrent of Plant and Soil Sciences.

    E-Print Network [OSTI]

    Sparks, Donald L.

    323. 1JYNJ;MI(S AND 00!ANTIM3 CF OOGINIC rouJJI'ANl' lNll'RICITrns (}l GAY MINERAlS. Z.Z. 2'bangI.ark. IE 19717-lm The interactions of clay minerals with organic pollutants .ere investigated using

  14. DIGITAL CHROMATOGRAPHY AND THE FORMA-TION OF HETEROGENEOUS DROPLET LIBRARIES

    E-Print Network [OSTI]

    Basu, Amar S.

    DIGITAL CHROMATOGRAPHY AND THE FORMA- TION OF HETEROGENEOUS DROPLET LIBRARIES USING University, Detroit MI, USA ABSTRACT Generating chemical libraries in droplet form is vital to the adoption in droplets (µFD), a method for generating heterogeneous droplet libraries using standard separation processes

  15. Mental Representations Formed From Educational Website Formats

    SciTech Connect (OSTI)

    Elizabeth T. Cady; Kimberly R. Raddatz; Tuan Q. Tran; Bernardo de la Garza; Peter D. Elgin

    2006-10-01T23:59:59.000Z

    The increasing popularity of web-based distance education places high demand on distance educators to format web pages to facilitate learning. However, limited guidelines exist regarding appropriate writing styles for web-based distance education. This study investigated the effect of four different writing styles on reader’s mental representation of hypertext. Participants studied hypertext written in one of four web-writing styles (e.g., concise, scannable, objective, and combined) and were then administered a cued association task intended to measure their mental representations of the hypertext. It is hypothesized that the scannable and combined styles will bias readers to scan rather than elaborately read, which may result in less dense mental representations (as identified through Pathfinder analysis) relative to the objective and concise writing styles. Further, the use of more descriptors in the objective writing style will lead to better integration of ideas and more dense mental representations than the concise writing style.

  16. The Star Formation Density at z=7

    E-Print Network [OSTI]

    F. Mannucci

    2006-11-29T23:59:59.000Z

    Near-infrared VLT data of the GOODS-South area were used to look for galaxies at z=7 down to a limiting magnitude of (J+Ks)AB=25.5. No high-redshift candidates were detected, and this provides clear evidence for a strong evolution of the luminosity function between z=6 and z=7, i.e. over a time interval of only 170 Myr. Our constraints provide evidence of a significant decline in the total star formation rate at z=7, which must be less than 40% of that at z=3 and 40-80% of that at z=6. The resulting upper limit to the ionizing flux at z=7 is only marginally consistent with what is required to completely ionize the Universe.

  17. The (Unstable) Threshold of Black Hole Formation

    E-Print Network [OSTI]

    M. W. Choptuik

    1998-03-23T23:59:59.000Z

    In recent years it has become apparent that intriguing phenomenology exists at the threshold of black hole formation in a large class of general relativistic collapse models. This phenomenology, which includes scaling, self-similarity and universality, is largely analogous to statistical mechanical critical behaviour, a fact which was first noted empirically, and subsequently clarified by perturbative calculations which borrow on ideas and techniques from dynamical systems theory and renormalization group theory. This contribution, which closely parallels my talk at the conference, consists of an overview of the considerable ``zoo''' of critical solutions which have been discovered thus far, along with a brief discussion of how we currently understand the nature of these solutions from the point of view of perturbation theory.

  18. Formation of nanofilament field emission devices

    DOE Patents [OSTI]

    Morse, Jeffrey D. (Martinez, CA); Contolini, Robert J. (Lake Oswego, OR); Musket, Ronald G. (Danville, CA); Bernhardt, Anthony F. (Berkeley, CA)

    2000-01-01T23:59:59.000Z

    A process for fabricating a nanofilament field emission device. The process enables the formation of high aspect ratio, electroplated nanofilament structure devices for field emission displays wherein a via is formed in a dielectric layer and is self-aligned to a via in the gate metal structure on top of the dielectric layer. The desired diameter of the via in the dielectric layer is on the order of 50-200 nm, with an aspect ratio of 5-10. In one embodiment, after forming the via in the dielectric layer, the gate metal is passivated, after which a plating enhancement layer is deposited in the bottom of the via, where necessary. The nanofilament is then electroplated in the via, followed by removal of the gate passification layer, etch back of the dielectric, and sharpening of the nanofilament. A hard mask layer may be deposited on top of the gate metal and removed following electroplating of the nanofilament.

  19. Abundance ratios in hierarchical galaxy formation

    E-Print Network [OSTI]

    D. Thomas

    1999-01-18T23:59:59.000Z

    The chemical enrichment and stellar abundance ratios of galaxies which form in a hierarchical clustering scheme are calculated. For this purpose I adopt the star formation histories (SFH) as they are delivered by semi-analytic models in Kauffmann (1996}. It turns out that the average SFH of cluster ellipticals does not yield globally alpha-enhanced stellar populations. The star burst that occurs when the elliptical forms in the major merger plays therefore a crucial role in producing alpha-enhancement. Only under the assumption that the IMF is significantly flattened with respect to the Salpeter value during the burst, a Mg/Fe overabundant population can be obtained. In particular for the interpretation of radial gradients in metallicity and alpha-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright field galaxies to be less alpha-enhanced than their counterparts in clusters.

  20. Star-Formation Knots in IRAS Galaxies

    E-Print Network [OSTI]

    J. B. Hutchings

    1995-11-08T23:59:59.000Z

    Images of IRAS galaxies with a range of IR properties are examined for bright knots, both within and outside the galaxy. These are found almost exclusively in galaxies with steep IR spectra, but over a wide range of IR luminosity, and usually without strong nuclear activity. In most cases, the knots are likely to be star-formation induced by tidal interactions, and are seen in the early stages of such interactions. Detailed photometry is presented of knots in six representative galaxies. The knots appear to have a wide range of colour and luminosity, but it is argued that many are heavily reddened. Knots formed outside the parent galaxy may be a new generation of what later become globular clusters, but they appear to have a wide range of luminosities.

  1. Lenticular Galaxy Formation - Possible Luminosity Dependence

    E-Print Network [OSTI]

    Sudhanshu Barway; Ajit Kembhavi; Yogesh Wadadekar; C. D. Ravikumar; Y. D. Mayya

    2007-03-27T23:59:59.000Z

    We investigate the correlation between the bulge effective radius (r_e) and disk scale length (r_d), in the near-infrared K band for lenticular galaxies in the field and in clusters. We find markedly different relations between the two parameters as a function of luminosity. Lenticulars with total absolute magnitude fainter than M_T = -24.5 show a positive correlation, in line with predictions of secular formation processes for the pseudo bulges of late-type disk galaxies. But brighter lenticulars with M_T < -24.5 show an anti-correlation, indicating that they formed through a different mechanism. The available data are insufficient to reliably determine the effect of galaxy environment on this correlation.

  2. Characterization of Pliocene and Miocene Formations in the Wilmington Graben, Offshore Los Angeles, for Large-Scale Geologic Storage of CO2

    SciTech Connect (OSTI)

    Bruno, Michael

    2014-12-08T23:59:59.000Z

    Geomechanics Technologies has completed a detailed characterization study of the Wilmington Graben offshore Southern California area for large-scale CO2 storage. This effort has included: an evaluation of existing wells in both State and Federal waters, field acquisition of about 175 km (109 mi) of new seismic data, new well drilling, development of integrated 3D geologic, geomechanics, and fluid flow models for the area. The geologic analysis indicates that more than 796 MMt of storage capacity is available within the Pliocene and Miocene formations in the Graben for midrange geologic estimates (P50). Geomechanical analyses indicate that injection can be conducted without significant risk for surface deformation, induced stresses or fault activation. Numerical analysis of fluid migration indicates that injection into the Pliocene Formation at depths of 1525 m (5000 ft) would lead to undesirable vertical migration of the CO2 plume. Recent well drilling however, indicates that deeper sand is present at depths exceeding 2135 m (7000 ft), which could be viable for large volume storage. For vertical containment, injection would need to be limited to about 250,000 metric tons per year per well, would need to be placed at depths greater than 7000ft, and would need to be placed in new wells located at least 1 mile from any existing offset wells. As a practical matter, this would likely limit storage operations in the Wilmington Graben to about 1 million tons per year or less. A quantitative risk analysis for the Wilmington Graben indicate that such large scale CO2 storage in the area would represent higher risk than other similar size projects in the US and overseas.

  3. Recovery of bypassed oil in the Dundee Formation (Devonian) of the Michigan Basin using horizontal drains. Final report, April 28, 1994--December 31, 1997

    SciTech Connect (OSTI)

    Wood, J.R.; Pennington, W.D.

    1998-09-01T23:59:59.000Z

    Total hydrocarbon production in the Michigan Basin has surpassed 1 billion barrels (Bbbls) and total unrecovered reserves are estimated at 1--2 BBbls. However, hydrocarbon production in Michigan has fallen from 35 MMbbls/yr in 1979 to about 10 MMbbls/yr in 1996. In an effort to slow this decline, a field demonstration project designed around using a horizontal well to recover bypassed oil was designed and carried out at Crystal Field in Montcalm County, MI. The project had two goals: to test the viability of using horizontal wells to recover bypassed oil from the Dundee Formation, and to characterize additional Dundee reservoirs (29) that are look alikes to the Crystal Field. As much as 85 percent of the oil known to exist in the Dundee Formation in the Michigan Basin remains in the ground as bypassed oil. Early production techniques in the 137 fields were poor, and the Dundee was at risk of being abandoned, leaving millions of barrels of oil behind. Crystal Field in Montcalm County, Michigan is a good example of a worn out field. Crystal Field was once a prolific producer which had been reduced to a handful of wells, the best of which produced only 5 barrels per day. The demonstration well drilled as a result of this project, however, has brought new life to the Crystal Field. Horizontal drilling is one of the most promising technologies available for oil production. The new well was completed successfully in October of 1995 and has been producing 100 barrels of oil per day, 20 times better than the best conventional well in the field.

  4. Cogeneration systems and processes for treating hydrocarbon containing formations

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Fowler, Thomas David (Houston, TX); Karanikas, John Michael (Houston, TX)

    2009-12-29T23:59:59.000Z

    A system for treating a hydrocarbon containing formation includes a steam and electricity cogeneration facility. At least one injection well is located in a first portion of the formation. The injection well provides steam from the steam and electricity cogeneration facility to the first portion of the formation. At least one production well is located in the first portion of the formation. The production well in the first portion produces first hydrocarbons. At least one electrical heater is located in a second portion of the formation. At least one of the electrical heaters is powered by electricity from the steam and electricity cogeneration facility. At least one production well is located in the second portion of the formation. The production well in the second portion produces second hydrocarbons. The steam and electricity cogeneration facility uses the first hydrocarbons and/or the second hydrocarbons to generate electricity.

  5. Local and Global Radiative Feedback from Population III Star Formation

    E-Print Network [OSTI]

    O'Shea, Brian W

    2010-01-01T23:59:59.000Z

    We present an overview of recent work that focuses on understanding the radiative feedback processes that are potentially important during Population III star formation. Specifically, we examine the effect of the Lyman-Werner (photodissociating) background on the early stages of primordial star formation, which serves to delay the onset of star formation in a given halo but never suppresses it entirely. We also examine the effect that both photodissociating and ionizing radiation in I-fronts from nearby stellar systems have on the formation of primordial protostellar clouds. Depending on the strength of the incoming radiation field and the central density of the halos, Pop III star formation can be suppressed, unaffected, or even enhanced. Understanding these and other effects is crucial to modeling Population III star formation and to building the earliest generations of galaxies in the Universe.

  6. FOURNET, M. & BEDIN, V. (1998). L'ingnierie de formation entre traditionalisme et modernisme ; les nouvelles formes de formation continue vues par des dirigeants de PME-PMI. Formation Emploi, n 63, 43-

    E-Print Network [OSTI]

    Boyer, Edmond

    1998-01-01T23:59:59.000Z

    ; les nouvelles formes de formation continue vues par des dirigeants de PME-PMI. Formation Emploi, n° 63 modernisme Les nouvelles formes de formation continue vues par des dirigeants de PME-PMI Michel Fournet et

  7. Irregular spacing of heat sources for treating hydrocarbon containing formations

    DOE Patents [OSTI]

    Miller, David Scott (Katy, TX); Uwechue, Uzo Philip (Houston, TX)

    2012-06-12T23:59:59.000Z

    A method for treating a hydrocarbon containing formation includes providing heat input to a first section of the formation from one or more heat sources located in the first section. Fluids are produced from the first section through a production well located at or near the center of the first section. The heat sources are configured such that the average heat input per volume of formation in the first section increases with distance from the production well.

  8. Method and apparatus for vibrating a substrate during material formation

    DOE Patents [OSTI]

    Bailey, Jeffrey A. (Richland, WA) [Richland, WA; Roger, Johnson N. (Richland, WA) [Richland, WA; John, Munley T. (Benton City, WA) [Benton City, WA; Walter, Park R. (Benton City, WA) [Benton City, WA

    2008-10-21T23:59:59.000Z

    A method and apparatus for affecting the properties of a material include vibrating the material during its formation (i.e., "surface sifting"). The method includes the steps of providing a material formation device and applying a plurality of vibrations to the material during formation, which vibrations are oscillations having dissimilar, non-harmonic frequencies and at least two different directions. The apparatus includes a plurality of vibration sources that impart vibrations to the material.

  9. Control of Formation and Cellular Detachment from Shewanella...

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

    and Cellular Detachment from Shewanella oneidensis MR-1 Biofilms by Cyclic di-GMP. Control of Formation and Cellular Detachment from Shewanella oneidensis MR-1 Biofilms by...

  10. aggregation rosette formation: Topics by E-print Network

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

    formed from an ensemble of charged proteins. The model predicts the formation of multi-fractal structures with the geometry of the growth determined by the electrostatic...

  11. Formation of aerobic granular sludge biofilms for sustainable wastewater treatment

    E-Print Network [OSTI]

    ENAC/ Formation of aerobic granular sludge biofilms for sustainable wastewater treatment David G Research, Microbiology of Interfaces, Magdeburg (Germany) EDCE 2011 / From activated sludge flocs

  12. (U) modulator to provide a continuous stepped frequency signal format

    DOE Patents [OSTI]

    Walters, Glenn A. (Escondido, CA)

    1991-01-01T23:59:59.000Z

    A modulator provides a continuous signal format composed of discrete freqcy steps and is designed to eliminate frequency overlap or smearing normally associated with filter ringing.

  13. COLD BUBBLE FORMATION DURING TOKAMAK DENSITY LIMIT DISRUPTIONS

    E-Print Network [OSTI]

    Howard, John

    COLD BUBBLE FORMATION DURING TOKAMAK DENSITY LIMIT DISRUPTIONS J. HOWARD, M. PERSSON* Plasma Research Laboratory, Research School of Physical Sciences, Australian National University, Canberra

  14. Recovery Act: Site Characterization of Promising Geologic Formations...

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

    Geologic Formations for CO2 Storage A Report on the The Department of Energy's (DOE's) Carbon Sequestration Program within the Office of Fossil Energy's (FE's) Coal Program...

  15. Biogenic formation of photoactive arsenic-sulfide nanotubes by...

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

    strain HN-41 . Abstract: Microorganisms facilitate the formation of a wide range of minerals that have unique physical and chemical properties as well as morphologies that are...

  16. aberration formation interaction: Topics by E-print Network

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

    Committee: Dr. Christopher C. Mathewson The U. S. Department of Energy's Hanford Site lies in the heart of the Columbia Plateau. The basalt formations beneath the Hanford...

  17. Formation of Supercooled Liquid Solutions from Nanoscale Amorphous...

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

    Supercooled Liquid Solutions from Nanoscale Amorphous Solid Films of Methanol and Ethanol. Formation of Supercooled Liquid Solutions from Nanoscale Amorphous Solid Films of...

  18. aerosol particle formation: Topics by E-print Network

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

    1. Introduction 2 Current models tend to under-predict secondary organic aerosol (SOA Weber, Rodney 3 Modeling particle formation during low-pressure silane oxidation: Detailed...

  19. Atomistic Simulation of Track Formation by Energetic Recoils...

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

    and nuclear waste immobilization. Citation: Moreira PA, R Devanathan, and WJ Weber.2010."Atomistic Simulation of Track Formation by Energetic Recoils in Zircon."Journal...

  20. abscess gas formation: Topics by E-print Network

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

    of these two wells enables angular ... Miller, Douglas E. 69 Characterizing water-in-oil emulsions with application to gas hydrate formation. Open Access Theses and...

  1. Formation enthalpies by mixing GGA and GGA + U calculations

    E-Print Network [OSTI]

    Jain, Anubhav

    Standard approximations to the density functional theory exchange-correlation functional have been extraordinary successful, but calculating formation enthalpies of reactions involving compounds with both localized and ...

  2. Uncovering Fundamental Ash-Formation Mechanisms and Potential...

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

    Analysis of Ash Formation and Transport Key Parameters Affecting DPF Performance Degradation and Impact on Lifetime Fuel Economy Non-Destructive X-ray Measurement of Soot, Ash,...

  3. authigenic carbonate formation: Topics by E-print Network

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

    L. Steinhardt; Dimitar D. Sasselov 2005-02-08 6 Carbon nanotube initiated formation of carbon nanoscrolls Zhao Zhang1 Materials Science Websites Summary: Carbon nanotube initiated...

  4. Step- vs. kink-formation energies on Pt(111)

    SciTech Connect (OSTI)

    FEIBELMAN,PETER J.

    2000-05-01T23:59:59.000Z

    Ab-initio kink-formation energies are about 0.25 and 0.18 eV on the (100)- and (111)-microfacet steps of Pt(111), while the sum of the step-formation energies is 0.75 eV/atom. These results imply a specific ratio of formation energies for the two step types, namely 1.14, in excellent agreement with experiment. If kink-formation costs the same energy on the two step types, an inference recently drawn from scanning probe observations of step wandering, this ratio ought to be 1.

  5. "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones...

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

    Road Princeton, NJ 08540-6649 "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones", Chun-Chieh Wu (National Taiwan University) Contact Information Website: Website...

  6. Histamine Formation and Honeycombing During Decomposition of Skipjack Tuna,

    E-Print Network [OSTI]

    Histamine Formation and Honeycombing During Decomposition of Skipjack Tuna, Katsuwonus pelamis pelamis, caught in Hawaiian waters. Fresh skipjack tuna tis- sue was practically devoid of histamine

  7. ampx anisn format: Topics by E-print Network

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

    unusual places such as the debris of colliding galaxies expelled into the intergalactic medium. Determining whether star-formation proceeds in the latter environment, far from...

  8. ascaris suum formation: Topics by E-print Network

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

    unusual places such as the debris of colliding galaxies expelled into the intergalactic medium. Determining whether star-formation proceeds in the latter environment, far from...

  9. argillaceous formations reactivite: Topics by E-print Network

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

    unusual places such as the debris of colliding galaxies expelled into the intergalactic medium. Determining whether star-formation proceeds in the latter environment, far from...

  10. accelerate thrombus formation: Topics by E-print Network

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

    as a function of time as structure formation proceeds, which mimics the effect of "dark energy" with negative pressure. Hence, the "acceleration" may be merely a mirage. We...

  11. aromatic hydrocarbon formation: Topics by E-print Network

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

    Iron Formation, Hamersley Group, and were collected in mines near Tom Price mature gas condensates. The aromatic fraction predominantly consists of unsubstituted two and...

  12. Frost formation and ice adhesion on superhydrophobic surfaces

    E-Print Network [OSTI]

    Varanasi, Kripa K.

    We study frost formation and its impact on icephobic properties of superhydrophobic surfaces. Using an environmental scanning electron microscope, we show that frost nucleation occurs indiscriminately on superhydrophobic ...

  13. A hybrid genetic algorithm for manufacturing cell formation

    E-Print Network [OSTI]

    José F. Gonçalves

    ... in cellular manufacturing is the formation of product families and machine cells. ... Computational experience with the algorithm on a set of group technology ...

  14. The Toolbox provides an operations manual for the formative assessment process, including procedures

    E-Print Network [OSTI]

    Mullins, Dyche

    decide whether to use RDS or TLS for the survey. Contents Formative assessment operations manualFormative assessment IBBS Toolbox The Toolbox provides an operations manual for the formative............................................................... 191 #12;#12;Formative assessment operations manual Formative assessment #12;Formative assessment

  15. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI.

    SciTech Connect (OSTI)

    James R. Wood; T.J. Bornhorst; William B. Harrison; W. Quinlan

    2002-04-01T23:59:59.000Z

    The fault study continues to find more faults and develop new techniques to visualize them. Data from the Dundee Formation has been used to document 11 major faults in the Michigan Basin which have now been verified using data from other horizons. These faults control the locations of many of the large anticlinal structures in the Michigan Basin and likely controlled fluid movements as well. The surface geochemistry program is also moving along well with emphasis on measuring samples collected last sampling season. The new GC laboratory is now functional and has been fully staffed as of December. The annual project review was held March 7-9 in Tampa, Florida. Contracts are being prepared for drilling the Bower's prospects in Isabella County, Michigan, this spring or summer. A request was made to extend the scope of the project to include the Willison Basin. A demonstration well has been suggested in Burke County, N. Dakota, following a review of 2D seismic and surface geochem. A 3D seismic survey is scheduled for the prospect.

  16. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI

    SciTech Connect (OSTI)

    James R. Wood; W. Quinlan

    2003-04-01T23:59:59.000Z

    The principal objective of the study was to test a new analytical technique, Solid-Phase Microextraction (SPME), for detecting trace amounts of light hydrocarbons in pore gases as a means of reducing risk in hydrocarbon exploration and production. This involved measuring the effectiveness of SPME to extract hydrocarbons under controlled conditions in the laboratory. As part of the study, a field demonstration was undertaken to assess the validity and usefulness of the laboratory results. Presented in this quarterly report is the condensed version of the Case History and Well Summary for the Bear Lake area in Manistee County, Michigan. The full version will be in the annual report. The condensed case history presents the important technical details regarding the geochemistry and horizontal lateral for Bear Lake, as well as the field demonstration results and the applicability of these results to other demonstration projects. This format could be duplicated for other demonstration projects and will be used on all subsequent field demonstrations as they near completion.

  17. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI.

    SciTech Connect (OSTI)

    James R. Wood; W. Quinlan

    2003-07-01T23:59:59.000Z

    The principal objective of this demonstration project is to test surface geochemical techniques for detecting trace amounts of light hydrocarbons in pore gases as a means of reducing risk in hydrocarbon exploration and production. As part of the project, a field demonstration was undertaken to assess the validity and usefulness of the microbial surface geochemical technique. The surface geochemistry data showed a strong anomaly in the Myrtle Beach area that would justify drilling by itself and even more so in conjunction with the structural interpretation from the 3D seismic data. The Myrtle Beach geochemical survey indicated a good to excellent prospect which was confirmed by drilling. Presented in this quarterly report is the Case History and Well Summary for the Myrtle Beach area in Burke County, North Dakota. This case history presents the important technical details regarding the geochemistry and the two vertical wells that are part of this field demonstration, and the applicability of these results to other demonstration projects. This format could be duplicated for other demonstration projects and is being used on all subsequent field demonstrations as they near completion.

  18. ON STAR FORMATION RATES AND STAR FORMATION HISTORIES OF GALAXIES OUT TO z {approx} 3

    SciTech Connect (OSTI)

    Wuyts, Stijn; Foerster Schreiber, Natascha M.; Lutz, Dieter; Nordon, Raanan; Berta, Stefano; Genzel, Reinhard; Magnelli, Benjamin; Poglitsch, Albrecht [Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching (Germany); Altieri, Bruno [Herschel Science Centre, ESAC, Villanueva de la Canada, 28691 Madrid (Spain); Andreani, Paola [ESO, Karl-Schwarzschild-Str. 2, D-85748 Garching (Germany); Aussel, Herve; Daddi, Emanuele; Elbaz, David [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, IRFU/Service d'Astrophysique, Bat.709, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France); Bongiovanni, Angel; Cepa, Jordi; Garcia, Ana Perez [Instituto de Astrofisica de Canarias, 38205 La Laguna (Spain); Cimatti, Andrea [Departamento di Astronomia, Universita di Bologna, via Ranzani 1, 40127 Bologna (Italy); Koekemoer, Anton M. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Maiolino, Roberto [INAF, Osservatorio Astronomico di Roma, via di Frascati 33, 00040 Monte Porzio Catone (Italy); McGrath, Elizabeth J. [University of California Observatories/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States)

    2011-09-01T23:59:59.000Z

    We compare multi-wavelength star formation rate (SFR) indicators out to z {approx} 3 in the GOODS-South field. Our analysis uniquely combines U to 8 {mu}m photometry from FIREWORKS, MIPS 24 {mu}m and PACS 70, 100, and 160 {mu}m photometry from the PEP, and H{alpha} spectroscopy from the SINS survey. We describe a set of conversions that lead to a continuity across SFR indicators. A luminosity-independent conversion from 24 {mu}m to total infrared luminosity yields estimates of L{sub IR} that are in the median consistent with the L{sub IR} derived from PACS photometry, albeit with significant scatter. Dust correction methods perform well at low-to-intermediate levels of star formation. They fail to recover the total amount of star formation in systems with large SFR{sub IR}/SFR{sub UV} ratios, typically occuring at the highest SFRs (SFR{sub UV+IR} {approx}> 100 M{sub sun} yr{sup -1}) and redshifts (z {approx}> 2.5) probed. Finally, we confirm that H{alpha}-based SFRs at 1.5 < z < 2.6 are consistent with SFR{sub SED} and SFR{sub UV+IR} provided extra attenuation toward H II regions is taken into account (A{sub V,neb} = A{sub V,continuum}/0.44). With the cross-calibrated SFR indicators in hand, we perform a consistency check on the star formation histories inferred from spectral energy distribution (SED) modeling. We compare the observed SFR-M relations and mass functions at a range of redshifts to equivalents that are computed by evolving lower redshift galaxies backward in time. We find evidence for underestimated stellar ages when no stringent constraints on formation epoch are applied in SED modeling. We demonstrate how resolved SED modeling, or alternatively deep UV data, may help to overcome this bias. The age bias is most severe for galaxies with young stellar populations and reduces toward older systems. Finally, our analysis suggests that SFHs typically vary on timescales that are long (at least several 100 Myr) compared to the galaxies' dynamical time.

  19. The Formation of Population III Binaries

    E-Print Network [OSTI]

    Kazuya Saigo; Tomoaki Matsumoto; Masayuki Umemura

    2004-10-29T23:59:59.000Z

    We explore the possibility for the formation of Population III binaries. The collapse of a rotating cylinder is simulated with a three-dimensional, high-resolution nested grid, assuming the thermal history of primordial gas. The simulations are done with dimensionless units, and the results are applicable to low-mass as well as massive systems by scaling with the initial density. We find that if the initial angular momentum is as small as $\\beta \\approx 0.1$, where $\\beta$ is the ratio of centrifugal force to pressure force, then the runaway collapse of the cloud stops to form a rotationally-supported disk. After the accretion of the envelope, the disk undergoes a ring instability, eventually fragmenting into a binary. If the initial angular momentum is relatively large, a bar-type instability arises, resulting in the collapse into a single star through rapid angular momentum transfer. The present results show that a significant fraction of Pop III stars are expected to form in binary systems, even if they are quite massive or less massive. The cosmological implications of Population III binaries are briefly discussed.

  20. The Formation of Population III Binaries

    E-Print Network [OSTI]

    Saigo, K; Umemura, M; Saigo, Kazuya; Matsumoto, Tomoaki; Umemura, Masayuki

    2004-01-01T23:59:59.000Z

    We explore the possibility for the formation of Population III binaries. The collapse of a rotating cylinder is simulated with a three-dimensional, high-resolution nested grid, assuming the thermal history of primordial gas. The simulations are done with dimensionless units, and the results are applicable to low-mass as well as massive systems by scaling with the initial density. We find that if the initial angular momentum is as small as $\\beta \\approx 0.1$, where $\\beta$ is the ratio of centrifugal force to pressure force, then the runaway collapse of the cloud stops to form a rotationally-supported disk. After the accretion of the envelope, the disk undergoes a ring instability, eventually fragmenting into a binary. If the initial angular momentum is relatively large, a bar-type instability arises, resulting in the collapse into a single star through rapid angular momentum transfer. The present results show that a significant fraction of Pop III stars are expected to form in binary systems, even if they ar...

  1. Halo Formation in Warm Dark Matter Models

    E-Print Network [OSTI]

    Paul Bode; Jeremiah P. Ostriker; Neil Turok

    2001-05-29T23:59:59.000Z

    Discrepancies have emerged between the predictions of standard cold dark matter (CDM) theory and observations of clustering on sub-galactic scales. Warm dark matter (WDM) is a simple modification of CDM in which the dark matter particles have initial velocities due either to their having decoupled as thermal relics, or having been formed via non-equilibrium decay. We investigate the nonlinear gravitational clustering of WDM with a high resolution N-body code, and identify a number of distinctive observational signatures. Relative to CDM, halo concentrations and core densities are lowered, core radii are increased, and large halos emerge with far fewer low mass satellites. The number of small halos is suppressed, and those present are formed by `top down' fragmentation of caustics, as part of a `cosmic web' connecting massive halos. Few small halos form outside this web. If we identify small halos with dwarf galaxies, their number, spatial distribution, and formation epoch appear in better agreement with the observations for WDM than they are for CDM.

  2. Formation and retention of methane in coal

    SciTech Connect (OSTI)

    Hucka, V.J.; Bodily, D.M.; Huang, H.

    1992-05-15T23:59:59.000Z

    The formation and retention of methane in coalbeds was studied for ten Utah coal samples, one Colorado coal sample and eight coal samples from the Argonne Premium Coal Sample Bank.Methane gas content of the Utah and Colorado coals varied from zero to 9 cm{sup 3}/g. The Utah coals were all high volatile bituminous coals. The Colorado coal was a gassy medium volatile bituminous coal. The Argonne coals cover a range or rank from lignite to low volatile bituminous coal and were used to determine the effect of rank in laboratory studies. The methane content of six selected Utah coal seams and the Colorado coal seam was measured in situ using a special sample collection device and a bubble desorbometer. Coal samples were collected at each measurement site for laboratory analysis. The cleat and joint system was evaluated for the coal and surrounding rocks and geological conditions were noted. Permeability measurements were performed on selected samples and all samples were analyzed for proximate and ultimate analysis, petrographic analysis, {sup 13}C NMR dipolar-dephasing spectroscopy, and density analysis. The observed methane adsorption behavior was correlated with the chemical structure and physical properties of the coals.

  3. Constructing Hydraulic Barriers in Deep Geologic Formations

    SciTech Connect (OSTI)

    Carter, E.E.; Carter, P.E. [Technologies Co, Texas (United States); Cooper, D.C. [Ph.D. Idaho National Laboratory, Idaho Falls, ID (United States)

    2008-07-01T23:59:59.000Z

    Many construction methods have been developed to create hydraulic barriers to depths of 30 to 50 meters, but few have been proposed for depths on the order of 500 meters. For these deep hydraulic barriers, most methods are potentially feasible for soil but not for hard rock. In the course of researching methods of isolating large subterranean blocks of oil shale, the authors have developed a wax thermal permeation method for constructing hydraulic barriers in rock to depths of over 500 meters in competent or even fractured rock as well as soil. The technology is similar to freeze wall methods, but produces a permanent barrier; and is potentially applicable in both dry and water saturated formations. Like freeze wall barriers, the wax thermal permeation method utilizes a large number of vertical or horizontal boreholes around the perimeter to be contained. However, instead of cooling the boreholes, they are heated. After heating these boreholes, a specially formulated molten wax based grout is pumped into the boreholes where it seals fractures and also permeates radially outward to form a series of columns of wax-impregnated rock. Rows of overlapping columns can then form a durable hydraulic barrier. These barriers can also be angled above a geologic repository to help prevent influx of water due to atypical rainfall events. Applications of the technique to constructing containment structures around existing shallow waste burial sites and water shutoff for mining are also described. (authors)

  4. On the formation of massive stellar clusters

    E-Print Network [OSTI]

    Tenorio-Tagle, G; Silich, S A; Medina-Tanco, G A; Muñoz-Tunón, C; Tenorio-Tagle, Guillermo; Palous, Jan; Silich, Sergiy; Medina-Tanco, Gustavo A.; Munoz-Tunon, Casiana

    2003-01-01T23:59:59.000Z

    Here we model a star forming factory in which the continuous creation of stars results in a highly concentrated, massive (globular cluster-like) stellar system. We show that under very general conditions a large-scale gravitational instability in the ISM, which triggers the collapse of a massive cloud, leads with the aid of a spontaneous first generation of massive stars, to a standing, small-radius, cold and dense shell. Eventually, as more of the collapsing matter is processed and incorporated, the shell becomes gravitationally unstable and begins to fragment, allowing the formation of new stars, while keeping its location. This is due to a detailed balance established between the ram pressure from the collapsing cloud which, together with the gravitational force exerted on the shell by the forming cluster, acts against the mechanical energy deposited by the collection of new stars. We analyze the mass spectrum of fragments that result from the continuous fragmentation of the standing shell and show that it...

  5. Graphite formation in the Hiroshima fire storm

    SciTech Connect (OSTI)

    Fields, D.E.; Crenshaw, M.; Yalcintas, M.G.; Strehlow, R.A. (Oak Ridge National Lab., TN (USA)); Cole, L.L. (Prairie View A and M Univ., TX (USA))

    1991-01-01T23:59:59.000Z

    In order to investigate what might be the composition and optical properties of particles that could lead to a nuclear winter, a search has been made for particles that had been generated in urban fire storms. Deposits containing small amounts of graphite have been found on an artifact from the Hiroshima fire storm. The fire storm was initiated on August 6, 1945, by the atomic bomb detonation. The particles were rained out of the atmosphere in the black rain that commenced following the urban fire storm. Initial studies using electron microscopy have revealed that the particles consist of a mixture of clay and amorphous sooty carbon. Scanning electron photomicrographs have suggested the presence of graphite. Its presence has been confirmed using laser Raman spectroscopy (LRS), surface ionization mass spectroscopy (SIMS), and electron scattering for chemical analysis (ESCA). Significant amounts of the sooty material consist of clay, and the graphite is probably present as short-range ordered structure in sooty microspheres. The results of this study are presented with a discussion of conditions that may lead to graphite formation.

  6. The Parameter Space of Galaxy Formation

    E-Print Network [OSTI]

    Bower, R G; Goldstein, M; Benson, A J; Lacey, C G; Baugh, C M; Cole, S; Frenk, C S; .,

    2010-01-01T23:59:59.000Z

    Semi-analytic models are a powerful tool for studying the formation of galaxies. However, these models inevitably involve a significant number of poorly constrained parameters that must be adjusted to provide an acceptable match to the observed universe. In this paper, we set out to quantify the degree to which observational data-sets can constrain the model parameters. By revealing degeneracies in the parameter space we can hope to better understand the key physical processes probed by the data. We use novel mathematical techniques to explore the parameter space of the GALFORM semi-analytic model. We base our investigation on the Bower et al. 2006 version of GALFORM, adopting the same methodology of selecting model parameters based on an acceptable match to the local bJ and K luminosity functions. The model contains 16 parameters that are poorly constrained, and we investigate this parameter space using the Model Emulator technique, constructing a Bayesian approximation to the GALFORM model that can be rapid...

  7. USING RECENT ADVANCES IN 2D SEISMIC TECHNOLOGY AND SURFACE GEOCHEMISTRY TO ECONOMICALLY REDEVELOP A SHALLOW SHELF CARBONATE RESERVOIR: VERNON FIELD, ISABELLA COUNTY, MI.

    SciTech Connect (OSTI)

    James R. Wood; T.J. Bornhorst; S.D. Chittichk; William B. Harrison; W. Quinlan

    2001-01-01T23:59:59.000Z

    The geochemical sampling team collected additional 148 samples at Vernon Field along 5 new traverses. Most of the locations were sampled for three types of analyses: microbial, iodine and enzyme leach; no results from the second batch of samples were available in time for this report. In addition to the sampling, a study was begun on the feasibility of collecting and analyzing hydrocarbon gases (C1-C8) directly. Although several companies offer these services, the cost ($200-300/sample w/o sampling fee) is high, on par with the cost of a 3D seismic survey, and may not include the raw data. However direct sampling of reservoir gases collecting in the soil appear to offer the best approach and should be included in this study. It would probably work well at Vernon Field. It may be possible to lower costs considerably; initial estimates of $20/sample for GCMS (Gas Chromatography--mass spectrometry) analysis are attractive and might induce to Michigan producers to include soil surveys in their routine field work-ups. A complete set of digital data was assembled for Vernon Field and nearby locations. The set consists of well locations, formation top picks, lithologies and scanned images of driller's reports and scout tickets. Well logs are still being located. The annual meeting for the Class Revisit work group is tentatively scheduled for the week of March 1-7 in Tampa, Fl. By that time all of the geochemical data will be available and final decisions regarding drilling can be made.

  8. PAPER FORMATTING GUIDELINES FOR POLITICAL SCIENCE COURSES. VANDERBILT UNIVERSITY

    E-Print Network [OSTI]

    Bordenstein, Seth

    PAPER FORMATTING GUIDELINES FOR POLITICAL SCIENCE COURSES. VANDERBILT UNIVERSITY (For 2012; longer quotations or extracts should be indented from the left margin and require no quotation marks to the following format: (Please note that the entries are indented after the first line. Word will do

  9. PAPER FORMATTING GUIDELINES FOR POLITICAL SCIENCE COURSES. VANDERBILT UNIVERSITY

    E-Print Network [OSTI]

    Bordenstein, Seth

    PAPER FORMATTING GUIDELINES FOR POLITICAL SCIENCE COURSES. VANDERBILT UNIVERSITY (For 2012 or extracts should be indented from the left margin and require no quotation marks. Changes and additions that the entries are indented after the first line. Word will do this automatically if you click on "Format

  10. Ring current formation influenced by solar wind substorm conditions

    E-Print Network [OSTI]

    Winglee, Robert M.

    Click Here for Full Article Ring current formation influenced by solar wind substorm conditions M outflows during an internally driven substorm. We show that the energization of the ions is not correlated with the time that the ions leave the ionosphere; instead energization is correlated with the formation

  11. antihydrogen formation dynamics: Topics by E-print Network

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

    antihydrogen formation dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Antihydrogen formation...

  12. Video Digests: A Browsable, Skimmable Format for Informational Lecture Videos

    E-Print Network [OSTI]

    O'Brien, James F.

    Video Digests: A Browsable, Skimmable Format for Informational Lecture Videos Amy Pavel, Colorado- ing current timeline-based video players. Video digests are a new format for informational videos authors create such digests using transcript-based interactions. With our tools, authors can manually

  13. Regeneration and pattern formation -an interview with Susan Bryant

    E-Print Network [OSTI]

    Chuong, Cheng-Ming

    Regeneration and pattern formation - an interview with Susan Bryant MICHAEL K. RICHARDSON*,1 Susan Bryant is one of the leading researchers in regeneration and pattern formation. Born in England, are seen by Susan Bryant as central to patterning. She argues that fibroblasts express positional values

  14. Past and future conditions for polar stratospheric cloud formation simulated

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    . In the future, radiative cooling in the Arctic winter due to climate change is more than compensated by an inPast and future conditions for polar stratospheric cloud formation simulated by the Canadian Middle Chemistry and Physics Past and future conditions for polar stratospheric cloud formation simulated

  15. Micro-Electromagnetic Formation Flight of Satellite Systems Aya Sakaguchi

    E-Print Network [OSTI]

    to maintain a satellite's relative position in a formation. Thus far, high temperature superconducting (HTS) wire has been considered the enabling technology and the concept has been sized for aggressive as well as HTS EMFF and shown to be advantageous in close proximity formations. Because the forces

  16. VISCOSITY OF CONCENTRATED SUSPENSIONS: INFLUENCE OF CLUSTER FORMATION

    E-Print Network [OSTI]

    Boyer, Edmond

    1 VISCOSITY OF CONCENTRATED SUSPENSIONS: INFLUENCE OF CLUSTER FORMATION V.Starov1 , V.Zhdanov1 , M and these forces determine both structure and size of clusters. We assume that viscosity of concentrated suspension of viscosity on a concentration of dispersed particles taking into account cluster formation, is deduced. Under

  17. Quasi Light Fields: A Model of Coherent Image Formation

    E-Print Network [OSTI]

    Wornell, Gregory W.

    Quasi Light Fields: A Model of Coherent Image Formation Anthony Accardi and Gregory Wornell formation that strikes a balance between the simplicity of the light field and the comprehensive predictive power of Maxwell's equations, by extending the light field to coherent radiation. © 2009 Optical Society

  18. FORMATION OF ROLL WAVES IN LAMINAR SHEET FLOW

    E-Print Network [OSTI]

    Julien, Pierre Y.

    with the wave kinematic viscosity of water distance downslope critical distance at which roll waves are formedFORMATION OF ROLL WAVES IN LAMINAR SHEET FLOW by Pierre Y. Julien and David M. Hartley January 1985 required for the formation of roll waves . . . . 5 2.3.1 Celerityofrollwaves . . . . . . . . . . . . . . 6

  19. Microfluidics Formation of Bubbles in a Multisection Flow-Focusing

    E-Print Network [OSTI]

    Prentiss, Mara

    Microfluidics Formation of Bubbles in a Multisection Flow-Focusing Junction Michinao Hashimoto the stable formation of trains of mono-, bi-, and tri-disperse bubbles in microfluidic flow- focusing (FF-assembly through the patterns of flow created by the bubbles. 1.1 Bubbles and Droplets in Microfluidics

  20. Nonequilibrium symmetry breaking and pattern formation in magnetic films

    E-Print Network [OSTI]

    Deutsch, Josh

    films. ­ p. 7/6 #12;Applications of Ferromagnetism Doodle Pads Refrigerator Magnets NonequilibriumNonequilibrium symmetry breaking and pattern formation in magnetic films Josh Deutsch University of California Santa Cruz Nonequilibrium symmetry breaking and pattern formation in magnetic films. ­ p. 1/6 #12

  1. UFO (UnFold Operator) default data format

    SciTech Connect (OSTI)

    Kissel, L.; Biggs, F. (Sandia National Labs., Albuquerque, NM (USA)); Marking, T.R. (Applied Physics, Inc., Albuquerque, NM (USA))

    1991-05-01T23:59:59.000Z

    The default format for the storage of x,y data for use with the UFO code is described. The format assumes that the data stored in a file is a matrix of values; two columns of this matrix are selected to define a function of the form y = f(x). This format is specifically designed to allow for easy importation of data obtained from other sources, or easy entry of data using a text editor, with a minimum of reformatting. This format is flexible and extensible through the use of inline directives stored in the optional header of the file. A special extension of the format implements encoded data which significantly reduces the storage required as compared wth the unencoded form. UFO supports several extensions to the file specification that implement execute-time operations, such as, transformation of the x and/or y values, selection of specific columns of the matrix for association with the x and y values, input of data directly from other formats (e.g., DAMP and PFF), and a simple type of library-structured file format. Several examples of the use of the format are given.

  2. Modelling new particle formation events in the South African savannah

    SciTech Connect (OSTI)

    Gierens, Rosa; Laakso, Lauri; Mogensen, Ditte; Vakkari, Ville; Buekes, Johan P.; Van Zyl, Pieter; Hakola, H.; Guenther, Alex B.; Pienaar, J. J.; Boy, Michael

    2014-05-28T23:59:59.000Z

    Africa is one of the less studied continents with respect to atmospheric aerosols. Savannahs are complex dynamic systems sensitive to climate and land-use changes, but the interaction of these systems with the atmosphere is not well understood. Atmospheric particles, called aerosols, affect the climate on regional and global scales, and are an important factor in air quality. In this study, measurements from a relatively clean savannah environment in South Africa were used to model new particle formation and growth. There already are some combined long-term measurements of trace gas concentrations together with aerosol and meteorological variables available, but to our knowledge this is the first detailed simulation that includes all the main processes relevant to particle formation. The results show that both of the particle formation mechanisms investigated overestimated the dependency of the formation rates on sulphuric acid. From the two particle formation mechanisms tested in this work, the approach that included low volatile organic compounds to the particle formation process was more accurate in describing the nucleation events than the approach that did not. To obtain a reliable estimate of aerosol concentration in simulations for larger scales, nucleation mechanisms would need to include organic compounds, at least in southern Africa. This work is the first step in developing a more comprehensive new particle formation model applicable to the unique environment in southern Africa. Such a model will assist in better understanding and predicting new particle formation – knowledge which could ultimately be used to mitigate impacts of climate change and air quality.

  3. A Flexible Proof Format for SMT: Frederic Besson

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Flexible Proof Format for SMT: a Proposal Fr´ed´eric Besson INRIA Rennes ­ Bretagne Atlantique The standard input format for Satisfiability Modulo Theories (SMT) solvers has now reached its second version and integrates many of the features useful for users to interact with their favourite SMT solver. However

  4. Formation and distribution of benzene on Titan V. Vuitton,1

    E-Print Network [OSTI]

    Yelle, Roger V.

    Formation and distribution of benzene on Titan V. Vuitton,1 R. V. Yelle,1 and J. Cui1 Received 29 a study of the formation and distribution of benzene (C6H6) on Titan. Analysis of the Cassini Mass Spectrometer (INMS) measurements of benzene densities on 12 Titan passes shows that the benzene signal exhibits

  5. Solution mining systems and methods for treating hydrocarbon containing formations

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); de Rouffignac, Eric Pierre (Rijswijk, NL); Schoeling, Lanny Gene (Katy, TX)

    2009-07-14T23:59:59.000Z

    A method for treating an oil shale formation comprising nahcolite is disclosed. The method includes providing a first fluid to a portion of the formation through at least two injection wells. A second fluid is produced from the portion through at least one injection well until at least two injection wells are interconnected such that fluid can flow between the two injection wells. The second fluid includes at least some nahcolite dissolved in the first fluid. The first fluid is injected through one of the interconnected injection wells. The second fluid is produced from at least one of the interconnected injection wells. Heat is provided from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the formation.

  6. Multiblock Grid Generation for Simulations in Geological Formations

    E-Print Network [OSTI]

    Sanjay Kumar Khattri

    2006-07-17T23:59:59.000Z

    Simulating fluid flow in geological formations requires mesh generation, lithology mapping to the cells, and computing geometric properties such as normal vectors and volume of cells. The purpose of this research work is to compute and process the geometrical information required for performing numerical simulations in geological formations. We present algebraic techniques, named Transfinite Interpolation, for mesh generation. Various transfinite interpolation techniques are derived from 1D projection operators. Many geological formations such as the Utsira formation (Torp and Gale, 2004; Khattri, Hellevang, Fladmark and Kvamme, 2006) and the Snohvit gas field (Maldal and Tappel, 2004) can be divided into layers or blocks based on the geometrical or lithological properties of the layers. We present the concept of block structured mesh generation for handling such formations.

  7. On the formation of massive stellar clusters

    E-Print Network [OSTI]

    Guillermo Tenorio-Tagle; Jan Palous; Sergiy Silich; Gustavo A. Medina-Tanco; Casiana Munoz-Tunon

    2003-08-25T23:59:59.000Z

    Here we model a star forming factory in which the continuous creation of stars results in a highly concentrated, massive (globular cluster-like) stellar system. We show that under very general conditions a large-scale gravitational instability in the ISM, which triggers the collapse of a massive cloud, leads with the aid of a spontaneous first generation of massive stars, to a standing, small-radius, cold and dense shell. Eventually, as more of the collapsing matter is processed and incorporated, the shell becomes gravitationally unstable and begins to fragment, allowing the formation of new stars, while keeping its location. This is due to a detailed balance established between the ram pressure from the collapsing cloud which, together with the gravitational force exerted on the shell by the forming cluster, acts against the mechanical energy deposited by the collection of new stars. We analyze the mass spectrum of fragments that result from the continuous fragmentation of the standing shell and show that its shape is well approximated at the high mass end by a power law with slope -2.25, very close to the value that fits the universal IMF. The self-contamination resultant from the continuous generation of stars is shown to lead to a large metal spread in massive ($\\sim$ 10$^6$ M$_\\odot$) clusters, while clusters with a mass similar to 10$^5$ M$_\\odot$ or smaller, simply reflect the initial metalicity of the collapsing cloud. This is in good agreement with the data available for globular clusters in the Galaxy.

  8. Monolithic or hierarchical star formation? A new statistical analysis

    E-Print Network [OSTI]

    Marios Kampakoglou; Roberto Trotta; Joe Silk

    2007-11-23T23:59:59.000Z

    We consider an analytic model of cosmic star formation which incorporates supernova feedback, gas accretion and enriched outflows, reproducing the history of cosmic star formation, metallicity, supernovae type II rates and the fraction of baryons allocated to structures. We present a new statistical treatment of the available observational data on the star formation rate and metallicity that accounts for the presence of possible systematics. We then employ a Bayesian Markov Chain Monte Carlo method to compare the predictions of our model with observations and derive constraints on the 7 free parameters of the model. We find that the dust correction scheme one chooses to adopt for the star formation data is critical in determining which scenario is favoured between a hierarchical star formation model, where star formation is prolonged by accretion, infall and merging, and a monolithic scenario, where star formation is rapid and efficient. We distinguish between these modes by defining a characteristic minimum mass, M > 10^{11} M_solar, in our fiducial model, for early type galaxies where star formation occurs efficiently. Our results indicate that the hierarchical star formation model can achieve better agreement with the data, but that this requires a high efficiency of supernova-driven outflows. In a monolithic model, our analysis points to the need for a mechanism that drives metal-poor winds, perhaps in the form of supermassive black hole-induced outflows. Furthermore, the relative absence of star formation beyond z ~ 5 in the monolithic scenario requires an alternative mechanism to dwarf galaxies for reionizing the universe at z ~ 11, as required by observations of the microwave background. While the monolithic scenario is less favoured in terms of its quality-of-fit, it cannot yet be excluded.

  9. HIERARCHICAL STRUCTURE FORMATION AND MODES OF STAR FORMATION IN HICKSON COMPACT GROUP 31

    SciTech Connect (OSTI)

    Gallagher, S. C. [Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7 (Canada); Durrell, P. R. [Department of Physics and Astronomy, Youngstown State University, Youngstown, OH 44555 (United States); Elmegreen, D. M. [Department of Physics and Astronomy, Vassar College, Poughkeepsie, NY 12604 (United States); Chandar, R. [Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606-3390 (United States); English, J. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, MN R3T 2N2 (Canada); Charlton, J. C.; Gronwall, C.; Young, J. [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Tzanavaris, P.; Hornschemeier, A. E. [Laboratory for X-ray Astrophysics, NASA's Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Johnson, K. E. [Department of Astronomy, University of Virginia, Charlottesville, VA 22904-4325 (United States); Mendes de Oliveira, C. [Instituto de Astronomia, Geofisica, e Ciencias Atmosfericas da Universidade de Sao Paulo, Sao Paulo (Brazil); Whitmore, B.; Maybhate, Aparna [Space Telescope Science Institute, Baltimore, MD 21218-2463 (United States); Zabludoff, Ann [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)], E-mail: sgalla4@uwo.ca

    2010-02-15T23:59:59.000Z

    The handful of low-mass, late-type galaxies that comprise Hickson Compact Group 31 (HCG 31) is in the midst of complex, ongoing gravitational interactions, evocative of the process of hierarchical structure formation at higher redshifts. With sensitive, multicolor Hubble Space Telescope imaging, we characterize the large population of < 10 Myr old star clusters (SCs) that suffuse the system. From the colors and luminosities of the young SCs, we find that the galaxies in HCG 31 follow the same universal scaling relations as actively star-forming galaxies in the local universe despite the unusual compact group environment. Furthermore, the specific frequency of the globular cluster system is consistent with the low end of galaxies of comparable masses locally. This, combined with the large mass of neutral hydrogen and tight constraints on the amount of intragroup light, indicate that the group is undergoing its first epoch of interaction-induced star formation. In both the main galaxies and the tidal-dwarf candidate, F, stellar complexes, which are sensitive to the magnitude of disk turbulence, have both sizes and masses more characteristic of z = 1-2 galaxies. After subtracting the light from compact sources, we find no evidence for an underlying old stellar population in F-it appears to be a truly new structure. The low-velocity dispersion of the system components, available reservoir of H I, and current star formation rate of {approx}10 M {sub sun} yr{sup -1} indicate that HCG 31 is likely to both exhaust its cold gas supply and merge within {approx}1 Gyr. We conclude that the end product will be an isolated, X-ray-faint, low-mass elliptical.

  10. Sources and Formation of OrganicSources and Formation of Organic Aerosols in our AtmosphereAerosols in our Atmosphere

    E-Print Network [OSTI]

    Einat, Aharonov

    Sources and Formation of OrganicSources and Formation of Organic Aerosols in our AtmosphereAerosols Department of Chemical Engineering University of Patras, Greece #12;Sources of Organic AerosolSources of Organic Aerosol Primary Secondary Anthropogenic ·Gasoline ·Diesel ·Biomass burning ·Meat Cooking Biogenic

  11. Solution mining dawsonite from hydrocarbon containing formations with a chelating agent

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX)

    2009-07-07T23:59:59.000Z

    A method for treating an oil shale formation comprising dawsonite includes providing heat from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the formation. At least some dawsonite in the formation is decomposed with the provided heat. A chelating agent is provided to the formation to dissolve at least some dawsonite decomposition products. The dissolved dawsonite decomposition products are produced from the formation.

  12. Sequestration of Dissolved CO2 in the Oriskany Formation

    SciTech Connect (OSTI)

    Dilmore, R.M.; Allen, D.E. (Salem State College, Salem, MA); McCarthy-Jones, J.R.; Hedges, S.W.; Soong, Yee

    2008-04-15T23:59:59.000Z

    Experiments were conducted to determine the solubility of CO2 in a natural brine solution of the Oriskany formation under elevated temperature and pressure conditions. These data were collected at temperatures of 22 and 75 °C and pressures between 100 and 450 bar. Experimentally determined data were compared with CO2 solubility predictions using a model developed by Duan and Sun (Chem. Geol. 2003, 193, 257-271). Model results compare well with Oriskany brine CO2 solubility data collected experimentally, suggesting that the Duan and Sun model is a reliable tool for estimating solution CO2 capacity in high salinity aquifers in the temperature and pressure range evaluated. The capacity for the Oriskany formation to sequester dissolved CO2 was calculated using results of the solubility models, estimation of the density of CO2 saturated brine, and available geographic information system (GIS) information on the formation depth and thickness. Results indicate that the Oriskany formation can hold approximately 0.36 gigatonnes of dissolved CO2 if the full basin is considered. When only the region where supercritical CO2 can exist (temperatures greater than 31° C and pressures greater than 74 bar) is considered, the capacity of the Oriskany formation to sequester dissolved CO2 is 0.31 gigatonnes. The capacity estimate considering the potential to sequester free-phase supercritical CO2 if brine were displaced from formation pore space is 8.8 gigatonnes in the Oriskany formation.

  13. Cloud and Star Formation in Disk Galaxy Models with Feedback

    E-Print Network [OSTI]

    Rahul Shetty; Eve C. Ostriker

    2008-05-26T23:59:59.000Z

    We include feedback in global hydrodynamic simulations in order to study the star formation properties, and gas structure and dynamics, in models of galactic disks. We extend previous models by implementing feedback in gravitationally bound clouds: momentum is injected at a rate proportional to the star formation rate. This mechanical energy disperses cloud gas back into the surrounding ISM, truncating star formation in a given cloud, and raising the overall level of ambient turbulence. Propagating star formation can however occur as expanding shells collide, enhancing the density and triggering new cloud and star formation. By controlling the momentum injection per massive star and the specific star formation rate in dense gas, we find that the negative effects of high turbulence outweigh the positive ones, and in net feedback reduces the fraction of dense gas and thus the overall star formation rate. The properties of the large clouds that form are not, however, very sensitive to feedback, with cutoff masses of a few million solar masses, similar to observations. We find a relationship between the star formation rate surface density and the gas surface density with a power law index ~2 for our models with the largest dynamic range, consistent with theoretical expectations for our model of disk flaring. We point out that the value of the "Kennicutt-Schmidt" index depends on the thickness of the disk. With our simple feedback prescription (a single combined star formation event per cloud), we find that global spiral patterns are not sustained; less correlated feedback and smaller scale turbulence appear to be necessary for spiral patterns to persist.

  14. Negative feedback effects on star formation history and cosmic reionization

    E-Print Network [OSTI]

    Lei Wang; Jirong Mao; Shouping Xiang; Ye-Fei Yuan

    2008-12-22T23:59:59.000Z

    After considering the effects of negative feedback on the process of star formation, we explore the relationship between star formation process and the associated feedback, by investigating how the mechanical feedback from supernovae(SNe) and radiative feedback from luminous objects regulate the star formation rate and therefore affect the cosmic reionization.Based on our present knowledge of the negative feedback theory and some numerical simulations, we construct an analytic model in the framework of the Lambda cold dark matter model. In certain parameter regions, our model can explain some observational results properly. In large halos(T_vir>10000 K), both mechanical and radiative feedback have a similar behavior: the relative strength of negative feedback reduces as the redshift decreases. In contrast, in small halos (T_virfeedback gets stronger when the redshift decreases. And the star formation rate in these small halos depends very weakly on the star-formation efficiency. Our results show that the radiative feedback is important for the early generation stars. It can suppress the star formation rate considerably. But the mechanical feedback from the SNe explosions is not able to affect the early star formation significantly. The early star formation in small-halo objects is likely to be self-regulated. The radiative and mechanical feedback dominates the star formation rate of the PopII/I stars all along. The feedback from first generation stars is very strong and should not be neglected. However, their effects on the cosmic reionization are not significant, which results in a small contribution to the optical depth of Thomson scattering.

  15. Method for ion implantation induced embedded particle formation via reduction

    DOE Patents [OSTI]

    Hampikian, Janet M (Decatur, GA); Hunt, Eden M (Atlanta, GA)

    2001-01-01T23:59:59.000Z

    A method for ion implantation induced embedded particle formation via reduction with the steps of ion implantation with an ion/element that will chemically reduce the chosen substrate material, implantation of the ion/element to a sufficient concentration and at a sufficient energy for particle formation, and control of the temperature of the substrate during implantation. A preferred embodiment includes the formation of particles which are nano-dimensional (<100 m-n in size). The phase of the particles may be affected by control of the substrate temperature during and/or after the ion implantation process.

  16. PageRank model of opinion formation on Ulam networks

    E-Print Network [OSTI]

    L. Chakhmakhchyan; D. Shepelyansky

    2013-11-03T23:59:59.000Z

    We consider a PageRank model of opinion formation on Ulam networks, generated by the intermittency map and the typical Chirikov map. The Ulam networks generated by these maps have certain similarities with such scale-free networks as the World Wide Web (WWW), showing an algebraic decay of the PageRank probability. We find that the opinion formation process on Ulam networks have certain similarities but also distinct features comparing to the WWW. We attribute these distinctions to internal differences in network structure of the Ulam and WWW networks. We also analyze the process of opinion formation in the frame of generalized Sznajd model which protects opinion of small communities.

  17. Systems and methods for producing hydrocarbons from tar sands formations

    DOE Patents [OSTI]

    Li, Ruijian (Katy, TX); Karanikas, John Michael (Houston, TX)

    2009-07-21T23:59:59.000Z

    A system for treating a tar sands formation is disclosed. A plurality of heaters are located in the formation. The heaters include at least partially horizontal heating sections at least partially in a hydrocarbon layer of the formation. The heating sections are at least partially arranged in a pattern in the hydrocarbon layer. The heaters are configured to provide heat to the hydrocarbon layer. The provided heat creates a plurality of drainage paths for mobilized fluids. At least two of the drainage paths converge. A production well is located to collect and produce mobilized fluids from at least one of the converged drainage paths in the hydrocarbon layer.

  18. Testing Disk Instability Models for Giant Planet Formation

    E-Print Network [OSTI]

    Alan P. Boss

    2007-04-09T23:59:59.000Z

    Disk instability is an attractive yet controversial means for the rapid formation of giant planets in our solar system and elsewhere. Recent concerns regarding the first adiabatic exponent of molecular hydrogen gas are addressed and shown not to lead to spurious clump formation in the author's disk instability models. A number of disk instability models have been calculated in order to further test the robustness of the mechanism, exploring the effects of changing the pressure equation of state, the vertical temperature profile, and other parameters affecting the temperature distribution. Possible reasons for differences in results obtained by other workers are discussed. Disk instability remains as a plausible formation mechanism for giant planets.

  19. Formation of molecular hydrogen on amorphous silicate surfaces

    E-Print Network [OSTI]

    Ling Li; Giulio Manico; Emanuele Congiu; Joe Roser; Sol Swords; Hagai B. Perets; Adina Lederhendler; Ofer Biham; John Robert Brucato; Valerio Pirronello; Gianfranco Vidali

    2007-09-16T23:59:59.000Z

    Experimental results on the formation of molecular hydrogen on amorphous silicate surfaces are presented and analyzed using a rate equation model. The energy barriers for the relevant diffusion and desorption processes are obtained. They turn out to be significantly higher than those obtained for polycrystalline silicates, demonstrating the importance of grain morphology. Using these barriers we evaluate the efficiency of molecular hydrogen formation on amorphous silicate grains under interstellar conditions. It is found that unlike polycrystalline silicates, amorphous silicate grains are efficient catalysts of H_2 formation in diffuse interstellar clouds.

  20. Lane formation in a system of dipolar microswimmers

    E-Print Network [OSTI]

    Florian Kogler; Sabine H. L. Klapp

    2015-03-25T23:59:59.000Z

    Using Brownian Dynamics (BD) simulations we investigate the non-equilibrium structure formation of a two-dimensional (2D) binary system of dipolar colloids propelling in opposite directions. Despite of a pronounced tendency for chain formation, the system displays a transition towards a laned state reminiscent of lane formation in systems with isotropic repulsive interactions. However, the anisotropic dipolar interactions induce novel features: First, the lanes have themselves a complex internal structure characterized by chains or clusters. Second, laning occurs only in a window of interaction strengths. We interprete our findings by a phase separation process and simple force balance arguments.

  1. Benzene formation in the inner regions of protostellar disks

    E-Print Network [OSTI]

    Paul M. Woods; Karen Willacy

    2006-12-08T23:59:59.000Z

    Benzene (c-C6H6) formation in the inner 3 AU of a protostellar disk can be efficient, resulting in high abundances of benzene in the midplane region. The formation mechanism is different to that found in interstellar clouds and in protoplanetary nebulae, and proceeds mainly through the reaction between allene (C3H4) and its ion. This has implications for PAH formation, in that some fraction of PAHs seen in the solar system could be native rather than inherited from the interstellar medium.

  2. Dilute Surfactant Methods for Carbonate Formations

    SciTech Connect (OSTI)

    Kishore K. Mohanty

    2006-02-01T23:59:59.000Z

    There are many fractured carbonate reservoirs in US (and the world) with light oil. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). The process of using dilute anionic surfactants in alkaline solutions has been investigated in this work for oil recovery from fractured oil-wet carbonate reservoirs both experimentally and numerically. This process is a surfactant-aided gravity drainage where surfactant diffuses into the matrix, lowers IFT and contact angle, which decrease capillary pressure and increase oil relative permeability enabling gravity to drain the oil up. Anionic surfactants have been identified which at dilute concentration of 0.05 wt% and optimal salinity can lower the interfacial tension and change the wettability of the calcite surface to intermediate/water-wet condition as well or better than the cationic surfactant DTAB with a West Texas crude oil. The force of adhesion in AFM of oil-wet regions changes after anionic surfactant treatment to values similar to those of water-wet regions. The AFM topography images showed that the oil-wetting material was removed from the surface by the anionic surfactant treatment. Adsorption studies indicate that the extent of adsorption for anionic surfactants on calcite minerals decreases with increase in pH and with decrease in salinity. Surfactant adsorption can be minimized in the presence of Na{sub 2}CO{sub 3}. Laboratory-scale surfactant brine imbibition experiments give high oil recovery (20-42% OOIP in 50 days; up to 60% in 200 days) for initially oil-wet cores through wettability alteration and IFT reduction. Small (<10%) initial gas saturation does not affect significantly the rate of oil recovery in the imbibition process, but larger gas saturation decreases the oil recovery rate. As the core permeability decreases, the rate of oil recovery reduces, and this reduction can be scaled by the gravitational dimensionless time. Mechanistic simulation of core-scale surfactant brine imbibition matches the experimentally observed imbibition data. In-situ distributions observed through simulation indicate that surfactant diffusion (which depends on temperature and molecular weight) is the rate limiting step. Most of the oil is recovered through gravitational forces. Oil left behind at the end of this process is at its residual oil saturation. The capillary and Bond numbers are not large enough to affect the residual oil saturation. At the field-scale, 50% of the recoverable oil is produced in about 3 years if the fracture spacing is 1 m and 25% if 10 m, in the example simulated. Decreasing fracture spacing and height, increasing permeability, and increasing the extent of wettability alteration increase the rate of oil recovery from surfactant-aided gravity drainage. This dilute surfactant aided gravity-drainage process is relatively cheap. The chemical cost for a barrel of oil produced is expected to be less than $1.

  3. Horizontal oil well applications and oil recovery assessment. Volume 1: Success of horizontal well technology, Final report

    SciTech Connect (OSTI)

    Deskins, W.G.; McDonald, W.J.; Knoll, R.G.; Springer, S.J.

    1995-03-01T23:59:59.000Z

    Horizontal technology has been applied in over 110 formations in the USA. Volume I of this study addresses the overall success of horizontal technology, especially in less-publicized formations, i.e., other than the Austin Chalk, Bakken, and Niobrara. Operators in the USA. and Canada were surveyed on a formation-by-formation basis by means of a questionnaire. Response data were received describing horizontal well projects in 58 formations in the USA. and 88 in Canada. Operators responses were analyzed for trends in technical and economic success based on lithology (clastics and carbonates) and resource type (light oil, heavy oil, and gas). The potential impact of horizontal technology on reserves was also estimated. A forecast of horizontal drilling activity over the next decade was developed.

  4. Horizontal oil well applications and oil recovery assessment. Volume 2: Applications overview, Final report

    SciTech Connect (OSTI)

    Deskins, W.G.; McDonald, W.J.; Knoll, R.G.; Springer, S.J.

    1995-03-01T23:59:59.000Z

    Horizontal technology has been applied in over 110 formations in the USA. Volume 1 of this study addresses the overall success of horizontal technology, especially in less-publicized formations, i.e., other than the Austin Chalk, Bakken, and Niobrara. Operators in the USA and Canada were surveyed on a formation-by-formation basis by means of a questionnaire. Response data were received describing horizontal well projects in 58 formations in the USA and 88 in Canada. Operators` responses were analyzed for trends in technical and economic success based on lithology (clastics and carbonates) and resource type (light oil, heavy oil, and gas). The potential impact of horizontal technology on reserves was also estimated. A forecast of horizontal drilling activity over the next decade was developed.

  5. The Recent Cluster Formation Histories of NGC 5253 and NGC 3077: Environmental Impact on Star Formation

    E-Print Network [OSTI]

    J. Harris; D. Calzetti; J. S. Gallagher III; D. A. Smith; C. J. Conselice

    2003-11-20T23:59:59.000Z

    We present multicolor photometry of bright star cluster candidates in the nearby starburst galaxies NGC 3077 and NGC 5253, observed with the Hubble Space Telescope Wide Field and Planetary Camera 2 in both broadband (F300W, F547M and F814W) and narrowband (F487N and F656N) filters. By comparing the photometry with theoretical population synthesis models, we estimate the age and mass of each star cluster, which provides constraints on the recent star formation histories of the host galaxies. We compare the star cluster populations in these dwarf starburst galaxies to those of the nuclear starburst in the barred spiral M 83, and discuss implications for our understanding of the nature and evolution of starburst events.

  6. The Recent Cluster Formation Histories of NGC 5253 and NGC 3077: Environmental Impact on Star Formation

    E-Print Network [OSTI]

    Harris, J; Smith, D A; Conselice, C J

    2004-01-01T23:59:59.000Z

    We present multicolor photometry of bright star cluster candidates in the nearby starburst galaxies NGC 3077 and NGC 5253, observed with the Hubble Space Telescope Wide Field and Planetary Camera 2 in both broadband (F300W, F547M and F814W) and narrowband (F487N and F656N) filters. By comparing the photometry with theoretical population synthesis models, we estimate the age and mass of each star cluster, which provides constraints on the recent star formation histories of the host galaxies. We compare the star cluster populations in these dwarf starburst galaxies to those of the nuclear starburst in the barred spiral M 83, and discuss implications for our understanding of the nature and evolution of starburst events.

  7. Clarifying the Dominant Sources and Mechanisms of Cirrus Cloud Formation

    E-Print Network [OSTI]

    Cziczo, Daniel James

    Formation of cirrus clouds depends on the availability of ice nuclei to begin condensation of atmospheric water vapor. Although it is known that only a small fraction of atmospheric aerosols are efficient ice nuclei, the ...

  8. acidizing subterranean formations: Topics by E-print Network

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

    in controlling (more) Barwary, Znar 2014-01-01 39 LACK OF CORRELATION BETWEEN GOUT AND THE INCORPORATION OF ISOTOPIC FORMATE INTO URIC ACID CiteSeer Summary: Certain...

  9. abscisic acid formation: Topics by E-print Network

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

    me the idea for my project... Tjhen, Kien Hoa 2012-06-07 32 LACK OF CORRELATION BETWEEN GOUT AND THE INCORPORATION OF ISOTOPIC FORMATE INTO URIC ACID CiteSeer Summary: Certain...

  10. acetohydroxamic acid formation: Topics by E-print Network

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

    Frdrique; Jaffrezo, J L; Legrand, M 2009-01-01 12 LACK OF CORRELATION BETWEEN GOUT AND THE INCORPORATION OF ISOTOPIC FORMATE INTO URIC ACID CiteSeer Summary: Certain...

  11. acid estolide formation: Topics by E-print Network

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

    Frdrique; Jaffrezo, J L; Legrand, M 2009-01-01 13 LACK OF CORRELATION BETWEEN GOUT AND THE INCORPORATION OF ISOTOPIC FORMATE INTO URIC ACID CiteSeer Summary: Certain...

  12. Collisionless Weibel shocks: Full formation mechanism and timing

    SciTech Connect (OSTI)

    Bret, A. [ETSI Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real (Spain); Instituto de Investigaciones Energéticas y Aplicaciones Industriales, Campus Universitario de Ciudad Real, 13071 Ciudad Real (Spain); Stockem, A. [GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon (Portugal); Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, D-44780 Bochum (Germany); Narayan, R. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-51 Cambridge, Massachusetts 02138 (United States); Silva, L. O. [GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon (Portugal)

    2014-07-15T23:59:59.000Z

    Collisionless shocks in plasmas play an important role in space physics (Earth's bow shock) and astrophysics (supernova remnants, relativistic jets, gamma-ray bursts, high energy cosmic rays). While the formation of a fluid shock through the steepening of a large amplitude sound wave has been understood for long, there is currently no detailed picture of the mechanism responsible for the formation of a collisionless shock. We unravel the physical mechanism at work and show that an electromagnetic Weibel shock always forms when two relativistic collisionless, initially unmagnetized, plasma shells encounter. The predicted shock formation time is in good agreement with 2D and 3D particle-in-cell simulations of counterstreaming pair plasmas. By predicting the shock formation time, experimental setups aiming at producing such shocks can be optimised to favourable conditions.

  13. Network Formation: Neighborhood Structures, Establishment Costs, and Distributed Learning

    E-Print Network [OSTI]

    Shamma, Jeff S.

    1 Network Formation: Neighborhood Structures, Establishment Costs, and Distributed Learning desirable properties such as connectivity, bounded-hop diameter and efficiency (i.e., minimum number several issues related to energy conservation, information and computational complexity. Thus, recent

  14. Wakate-Initiative Seminar Memory formation in the fly brain!

    E-Print Network [OSTI]

    Ejiri, Shinji

    Wakate-Initiative Seminar Memory formation in the fly brain! Dr. Hiromu Tanimoto Head is synthesized in ~280 neurons in the fly brain and involved also in other brain functions, it is important

  15. DYNAMIC SIMULATION OF THE TEMPORAL RESPONSE OF MICROSTRUCTURE FORMATION IN

    E-Print Network [OSTI]

    DYNAMIC SIMULATION OF THE TEMPORAL RESPONSE OF MICROSTRUCTURE FORMATION IN MAGNETORHEOLOGICAL in that the dielectric response of an ER fluid is studied in response to an electrical stimulus. These studies of MR

  16. Formation Damage due to CO2 Sequestration in Saline Aquifers

    E-Print Network [OSTI]

    Mohamed, Ibrahim Mohamed 1984-

    2012-10-25T23:59:59.000Z

    Carbon dioxide (CO2) sequestration is defined as the removal of gas that would be emitted into the atmosphere and its subsequent storage in a safe, sound place. CO2 sequestration in underground formations is currently being considered to reduce...

  17. Formation Of The Spinel Phase In The Layered Composite Cathode...

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

    Of The Spinel Phase In The Layered Composite Cathode Used In Li-Ion Batteries. Formation Of The Spinel Phase In The Layered Composite Cathode Used In Li-Ion Batteries. Abstract:...

  18. Radial and Spiral Stream Formation in Proteus mirabilis Colonies

    E-Print Network [OSTI]

    Xue, Chuan

    The enteric bacterium Proteus mirabilis, which is a pathogen that forms biofilms in vivo, can swarm over hard surfaces and form a variety of spatial patterns in colonies. Colony formation involves two distinct cell types: ...

  19. Formation lengths of hadrons in lepto-production

    E-Print Network [OSTI]

    Levon Grigoryan

    2012-09-28T23:59:59.000Z

    The average formation lengths of the hadrons produced during the deep inelastic scattering (DIS) of leptons on protons are studied in the framework of the symmetric Lund model. It is shown that these formation lengths essentially depend on the electric charges of the hadron. For electro-production and charged current (CC) neutrino-production, the average formation lengths of positively charged particles are larger than those of negatively charged antiparticles. This situation is reversed for CC antineutrino-production. In all the mentioned cases, the main mechanism is the direct production of hadrons. The additional mechanism of hadron production, through the decay of resonances, is essential only for pions and leads to a decrease in the average formation lengths.

  20. Mode spectrum and temporal soliton formation in optical microresonators

    E-Print Network [OSTI]

    Herr, T; Jost, J D; Mirgorodskiy, I; Lihachev, G; Gorodetsky, M L; Kippenberg, T J

    2013-01-01T23:59:59.000Z

    The formation of temporal dissipative solitons in optical microresonators enables compact, high repetition rate sources of ultra-short pulses as well as low noise, broadband optical frequency combs with smooth spectral envelopes. Here we study the influence of the resonator mode spectrum on temporal soliton formation. Using frequency comb assisted diode laser spectroscopy, the measured mode structure of crystalline MgF2 resonators are correlated with temporal soliton formation. While an overal general anomalous dispersion is required, it is found that higher order dispersion can be tolerated as long as it does not dominate the resonator's mode structure. Mode coupling induced avoided crossings in the resonator mode spectrum are found to prevent soliton formation, when affecting resonator modes close to the pump laser. The experimental observations are in excellent agreement with numerical simulations based on the nonlinear coupled mode equations, which reveal the rich interplay of mode crossings and soliton f...

  1. CHEMOSTRATIGRAPHY OF THE PALEOPROTEROZOIC DUITSCHLAND FORMATION, SOUTH AFRICA: IMPLICATIONS FOR

    E-Print Network [OSTI]

    Kaufman, Alan Jay

    CHEMOSTRATIGRAPHY OF THE PALEOPROTEROZOIC DUITSCHLAND FORMATION, SOUTH AFRICA: IMPLICATIONS the only unequivocal glacial unit of this era in the Transvaal Basin, South Africa. Lithologic evidence Park 2006, Johannesburg, South Africa. [American Journal of Science, Vol. 301, March, 2001, P. 261

  2. Optimal Formation Flight Control Using Coupled Inter-Spacecraft Dynamics

    E-Print Network [OSTI]

    , Alvar Saenz-Otero October 2009 SSL # 10-09 #12;#12;Optimal Formation Flight Control Using Coupled Inter-Spacecraft Dynamics Martin Azkarate Vecilla, Alvar Saenz-Otero October 2009 SSL # 10-09 This work is based

  3. CONSENSUS SEEKING, FORMATION KEEPING, AND TRAJECTORY TRACKING IN MULTIPLE VEHICLE

    E-Print Network [OSTI]

    Ren, Wei

    to mobile robots, unmanned air vehicles, autonomous underwater vehicles, satellites, aircraft, spacecraft controllers for fixed wing unmanned air vehicles and nonholonomic mobile robots with velocity and heading rateCONSENSUS SEEKING, FORMATION KEEPING, AND TRAJECTORY TRACKING IN MULTIPLE VEHICLE COOPERATIVE

  4. Estimating A Shear Modulus Of A Transversely Isotropic Formation

    E-Print Network [OSTI]

    Ellefsen, K. J.

    1990-01-01T23:59:59.000Z

    A method to estimate c[subscript 66], which is a shear modulus of a transversely isotropic formation (with its symmetry axis parallel to the borehole), is developed and tested. The inversion for c[subscript 66] is based ...

  5. Androgen Receptor Formation in Prenatally Endocrine Disrupted Mice

    E-Print Network [OSTI]

    Irwin, Conor David

    2013-10-03T23:59:59.000Z

    ) and we are hypothesizing that this androgen receptor malformation may decrease physical activity after birth. Therefore, the purpose of this study is to explore the relationship between endocrine disruptors given prenatally, androgen receptor formation...

  6. Energetics of [alpha]-helix formation in peptides and proteins

    E-Print Network [OSTI]

    Schubert, Christian Reinhold

    2009-01-01T23:59:59.000Z

    This thesis focuses on the energetics of !-helix formation in peptides and proteins. The [alpha]-helix is the most prevalent type of secondary structure found in proteins, and has arguably dominated our thinking about ...

  7. EXFOR systems manual: Nuclear reaction data exchange format

    SciTech Connect (OSTI)

    McLane, V. [ed.

    1996-07-01T23:59:59.000Z

    This document describes EXFOR, the exchange format designed to allow transmission of nuclear reaction data between the members of the Nuclear Data Centers Network. In addition to storing the data and its bibliographic information, experimental information, including source of uncertainties, is also compiled. The status and history of the data set is also included, e.g., the source of the data, any updates which have been made, and correlations to other data sets. The exchange format, as outlined, is designed to allow a large variety of numerical data tables with explanatory and bibliographic information to be transmitted in an easily machine-readable format (for checking and indicating possible errors) and a format that can be read by personnel (for passing judgment on and correcting any errors indicated by the machine).

  8. Photogeneration of an active formate-decomposition catalyst

    SciTech Connect (OSTI)

    King, A.D. Jr.; King, R.B.; Sailers, E.L. III

    1981-04-08T23:59:59.000Z

    Some preliminary observations on the decomposition of an active formate species in the reaction of the group 6 metal carbonyl catalyzed water gas shift process were made using a photolytically-generated W(CO)/sub 5/ intermediate. H/sub 2/ production from the aqueous solutions containing Na format and W(CO)/sub 6/ was much more rapid for illuminated solutions than for non-illuminated. However, no measurable hydrogen was produced from either illuminated or non-illuminated solutions when Na formate was replaced by KOH. Essentially the same results were noted for the photolytically-catalyzed production of H/sub 2/ when solutions of tetrahydrofuran were used. It is thus concluded that the H/sub 2/ and CO must result from decomposition of the formate ion in the reaction mixture and that the W(CO)/sub 6/ is a precursor of the catalytically active W(CO)/sub 5/. (BLM)

  9. Mechanism of vacancy formation induced by hydrogen in tungsten

    SciTech Connect (OSTI)

    Liu, Yi-Nan [School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191 (China) [School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191 (China); Association EURATOM-TEKES, University of Helsinki, Helsinki, PO Box 64, 00560 (Finland); Ahlgren, T.; Bukonte, L.; Nordlund, K. [Association EURATOM-TEKES, University of Helsinki, Helsinki, PO Box 64, 00560 (Finland)] [Association EURATOM-TEKES, University of Helsinki, Helsinki, PO Box 64, 00560 (Finland); Shu, Xiaolin; Yu, Yi; Lu, Guang-Hong, E-mail: LGH@buaa.edu.cn [School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191 (China)] [School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191 (China); Li, Xiao-Chun [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China)] [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China)

    2013-12-15T23:59:59.000Z

    We report a hydrogen induced vacancy formation mechanism in tungsten based on classical molecular dynamics simulations. We demonstrate the vacancy formation in tungsten due to the presence of hydrogen associated directly with a stable hexagonal self-interstitial cluster as well as a linear crowdion. The stability of different self-interstitial structures has been further studied and it is particularly shown that hydrogen plays a crucial role in determining the configuration of SIAs, in which the hexagonal cluster structure is preferred. Energetic analysis has been carried out to prove that the formation of SIA clusters facilitates the formation of vacancies. Such a mechanism contributes to the understanding of the early stage of the hydrogen blistering in tungsten under a fusion reactor environment.

  10. Numerical investigation of the threshold for primordial black hole formation

    E-Print Network [OSTI]

    J. C. Niemeyer

    1998-06-02T23:59:59.000Z

    First results of a numerical investigation of primordial black hole formation in the radiation dominated phase of the Early Universe are presented. The simulations follow the gravitational collapse of three different families of high-amplitude density fluctuations imposed at the time of horizon crossing. The threshold for black hole formation, \\delta_{c} \\approx 0.7, is found to be nearly identical for all perturbation families if the control parameter, \\delta, is chosen as the total excess mass within the initial horizon volume. Furthermore, we demonstrate that the scaling of black hole mass with distance from the formation threshold, known to occur in near-critical gravitational collapse, applies to primordial black hole formation.

  11. Star formation histories in early-type galaxies

    E-Print Network [OSTI]

    D. Thomas

    1998-08-24T23:59:59.000Z

    I discuss the formation of alpha-enhanced metal-rich stellar populations in the nuclei of luminous ellipticals. Based on hierarchical clustering, different galaxy formation scenarios, which imply different star formation histories, are considered. In contrast to the fast clumpy collapse mode, the late merger of two spiral galaxies fails to reproduce significantly $\\alpha$-enhanced abundance ratios, unless the IMF is flattened. Following the star formation history predicted by semi-analytic models of hierarchical clustering for the average elliptical, solar abundance ratios are obtained with Salpeter IMF. According to the models, bright ellipticals in the field are expected to have significantly lower Mg/Fe ratios than their counterparts in a cluster.

  12. Androgen Receptor Formation in Prenatally Endocrine Disrupted Mice 

    E-Print Network [OSTI]

    Irwin, Conor David

    2013-10-03T23:59:59.000Z

    contributing to physical activity suggests that androgen receptors are key mediators in activity regulation (3,4). Current literature suggests that certain chemicals, like Benzyl butyl phthalate (BBP), disrupts androgen receptor formation prenatally (5, 6...

  13. Quasi Light Fields: A Model of Coherent Image Formation

    E-Print Network [OSTI]

    Accardi, Anthony J.

    We develop a model of coherent image formation that strikes a balance between the simplicity of the light field and the comprehensive predictive power of Maxwell's equations, by extending the light field to coherent radiation.

  14. PRODUCT REPRESENTATION IN LIGHTWEIGHT FORMATS FOR PRODUCT LIFECYCLE MANAGEMENT (PLM)

    E-Print Network [OSTI]

    Rzepa, Henry S.

    PRODUCT REPRESENTATION IN LIGHTWEIGHT FORMATS FOR PRODUCT LIFECYCLE MANAGEMENT (PLM) Lian Ding environments and the entire product lifecycle. There are new requirements for product representations, including: platform/application independence, support for the product lifecycle, rapidly sharing information

  15. DOE Manual Studies 11 Major CO2 Geologic Storage Formations

    Broader source: Energy.gov [DOE]

    A comprehensive study of 11 geologic formations suitable for permanent underground carbon dioxide (CO2) storage is contained in a new manual issued by the U.S. Department of Energy.

  16. The Complexity of Rationalizing Network Formation Shankar Kalyanaraman

    E-Print Network [OSTI]

    Umans, Chris

    and the Inequality-SAT (I-SAT) problem. Finally and most significantly, we prove that an approximation version. Keywords-network formation games, rationalization, Jackson- Wolinsky model, Inequality-SAT, hardness

  17. Network Formation in the Presence of Contagious Risk Larry Blume

    E-Print Network [OSTI]

    Kleinberg, Robert D.

    Network Formation in the Presence of Contagious Risk Larry Blume David Easley Jon Kleinberg-linking" in networks with contagious risk can have strong consequences for the welfare of the participants. 1

  18. Pb nanowire formation on Al/lead zirconate titanate surfaces...

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

    pattering of the Al film. Citation: Alvine KJ, V Shutthanandan, BW Arey, CM Wang, WD Bennett, and SG Pitman.2012."Pb nanowire formation on Allead zirconate titanate surfaces in...

  19. Rapid Gas Hydrate Formation Processes: Will They Work?

    SciTech Connect (OSTI)

    Brown, T.D.; Taylor, C.E.; Bernardo, M.P.

    2010-01-01T23:59:59.000Z

    Researchers at DOE’s National Energy Technology Laboratory (NETL) have been investigating the formation of synthetic gas hydrates, with an emphasis on rapid and continuous hydrate formation techniques. The investigations focused on unconventional methods to reduce dissolution, induction, nucleation and crystallization times associated with natural and synthetic hydrates studies conducted in the laboratory. Numerous experiments were conducted with various high-pressure cells equipped with instrumentation to study rapid and continuous hydrate formation. The cells ranged in size from 100 mL for screening studies to proof-of-concept studies with NETL’s 15-Liter Hydrate Cell. Results from this work demonstrate that the rapid and continuous formation of methane hydrate is possible at predetermined temperatures and pressures within the stability zone of a Methane Hydrate Stability Curve (see Figure 1).

  20. Star Formation in Mergers and Interacting Galaxies: Gathering the Fuel

    E-Print Network [OSTI]

    Curtis Struck

    2006-10-06T23:59:59.000Z

    Selected results from recent studies of star formation in galaxies at different stages of interaction are reviewed. Recent results from the Spitzer Space Telescope are highlighted. Ideas on how large-scale driving of star formation in interacting galaxies might mesh with our understanding of star formation in isolated galaxies and small scale mechanisms within galaxies are considered. In particular, there is evidence that on small scales star formation is determined by the same thermal and turbulent processes in cool compressed clouds as in isolated galaxies. If so, this affirms the notion that the primary role of large-scale dynamics is to gather and compress the gas fuel. In gas-rich interactions this is generally done with increasing efficiency through the merger process.

  1. als promote formation: Topics by E-print Network

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

    13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Spinning dark matter halos promote bar formation CERN Preprints Summary: Stellar bars are the most common...

  2. THE ERA OF STAR FORMATION IN GALAXY CLUSTERS

    E-Print Network [OSTI]

    Brodwin, M.

    We analyze the star formation properties of 16 infrared-selected, spectroscopically confirmed galaxy clusters at 1 < z < 1.5 from the Spitzer/IRAC Shallow Cluster Survey (ISCS). We present new spectroscopic confirmation ...

  3. Star Formation in the Era of the Three Great Observatories

    E-Print Network [OSTI]

    Scott J. Wolk; Norbert Schulz; John Stauffer; Nancy Evans; Leisa Townsley; Tom Megeath; Dave Huenemoerder; Claus Leitherer; Ray Jayawardana

    2006-04-19T23:59:59.000Z

    This paper summarizes contributions and suggestions as presented at the Chandra Workshop Star Formation in the Era of Three Great Observatories conducted in July 2005. One of the declared goals of the workshop was to raise recognition within the star formation research community about the sensible future utilization of the space observatories Spitzer, Hubble, and Chandra in their remaining years of operation to tackle imminent questions of our understanding of stellar formation and the early evolution of stars. A white paper was generated to support the continuous and simultaneous usage of observatory time for star formation research. The contents of this paper have been presented and discussed at several other meetings during the course of 2005 and January 2006.

  4. Polymorphism control and the formation of organic molecular nanocrystals

    E-Print Network [OSTI]

    Yang, Xiaochuan, Ph. D. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    The formation of organic molecular nanocrystals is a topic of great interest in the pharmaceutical industry because of the potential increase in dissolution rate and solubility of organic crystals below 1 ptm and their ...

  5. Formation Damage due to CO2 Sequestration in Saline Aquifers 

    E-Print Network [OSTI]

    Mohamed, Ibrahim Mohamed 1984-

    2012-10-25T23:59:59.000Z

    the amount of CO2 emitted into the atmosphere. However, a better understanding of the chemical and physical interactions between CO2, water, and formation rock is necessary before sequestration. These interactions can be evaluated by the change in mineral...

  6. Substructure: Clues to the Formation of Clusters of Galaxies

    E-Print Network [OSTI]

    Michael J. West; Christine Jones; William Forman

    1995-07-26T23:59:59.000Z

    We have examined the spatial distribution of substructure in clusters of galaxies using Einstein X-ray observations. Subclusters are found to have a markedly anisotropic distribution that reflects the surrounding matter distribution on supercluster scales. Our results suggest a picture in which cluster formation proceeds by mergers of subclusters along large-scale filaments. The implications of such an anisotropic formation process for the shapes, orientations and kinematics of clusters are discussed briefly.

  7. STAR FORMATION IN NUCLEAR RINGS OF BARRED GALAXIES

    SciTech Connect (OSTI)

    Seo, Woo-Young; Kim, Woong-Tae, E-mail: seowy@astro.snu.ac.kr, E-mail: wkim@astro.snu.ac.kr [Center for the Exploration of the Origin of the Universe (CEOU), Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of)

    2013-06-01T23:59:59.000Z

    Nuclear rings in barred galaxies are sites of active star formation. We use hydrodynamic simulations to study the temporal and spatial behavior of star formation occurring in nuclear rings of barred galaxies where radial gas inflows are triggered solely by a bar potential. The star formation recipes include a density threshold, an efficiency, conversion of gas to star particles, and delayed momentum feedback via supernova explosions. We find that the star formation rate (SFR) in a nuclear ring is roughly equal to the mass inflow rate to the ring, while it has a weak dependence on the total gas mass in the ring. The SFR typically exhibits a strong primary burst followed by weak secondary bursts before declining to very small values. The primary burst is associated with the rapid gas infall to the ring due to the bar growth, while the secondary bursts are caused by re-infall of the ejected gas from the primary burst. While star formation in observed rings persists episodically over a few Gyr, the duration of active star formation in our models lasts for only about half of the bar growth time, suggesting that the bar potential alone is unlikely to be responsible for gas supply to the rings. When the SFR is low, most star formation occurs at the contact points between the ring and the dust lanes, leading to an azimuthal age gradient of young star clusters. When the SFR is large, on the other hand, star formation is randomly distributed over the whole circumference of the ring, resulting in no apparent azimuthal age gradient. Since the ring shrinks in size with time, star clusters also exhibit a radial age gradient, with younger clusters found closer to the ring. The cluster mass function is well described by a power law, with a slope depending on the SFR. Giant gas clouds in the rings have supersonic internal velocity dispersions and are gravitationally bound.

  8. Formation, regeneration and fusion of protoplasts from Gliocladium spp.

    E-Print Network [OSTI]

    Seh, Monica Leigh

    1987-01-01T23:59:59.000Z

    FORMATION, REGENERATION AND FUSION OF PROTOPLASTS FROM GLIOCLADIUM SPP. A Thesis by MONICA LEIGH SEH Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirements of the degree of MASTER OF SCIENCE... August 1987 Major Subject: Plant Pathology FORMATION, REGENERATION AND FUSION OF PROTOPLASTS FROM GLIOCLADIUM SPP. A Thesis MONICA LEIGH SEH Approved as to style and content by: Charles M. X nerle (Chairperson of Committee) ic ael D. Thomas...

  9. Quantum Black Hole Formation in the BFSS Matrix Model

    E-Print Network [OSTI]

    Sinya Aoki; Masanori Hanada; Norihiro Iizuka

    2015-03-18T23:59:59.000Z

    We study the various head-on collisions of two bunches of D0-branes and their real-time evolution in the BFSS matrix model in classical limit. For a various matrix size N respecting the 't Hooft scaling, we find quantitative evidence for the formation of a single bound state of D0-branes at late time, which is matrix model thermalization and dual to the formation of a larger black hole.

  10. Constraining Galaxy Formation Models with Dwarf Ellipticals in Clusters

    E-Print Network [OSTI]

    Christopher J. Conselice

    2005-12-20T23:59:59.000Z

    Recent observations demonstrate that dwarf elliptical (dE) galaxies in clusters, despite their faintness, are likely a critical galaxy type for understanding the processes behind galaxy formation. Dwarf ellipticals are the most common galaxy type, and are particularly abundant in rich galaxy clusters. The dwarf to giant ratio is in fact highest in rich clusters of galaxies, suggesting that cluster dEs do not form in groups that later merge to form clusters. Dwarf ellipticals are potentially the only galaxy type whose formation is sensitive to global, rather than local, environment. The dominant idea for explaining the formation of these systems, through Cold Dark Matter models, is that dEs form early and within their present environments. Recent results suggest that some dwarfs appear in clusters after the bulk of massive galaxies form, a scenario not predicted in standard hierarchical structure formation models. Many dEs have younger and more metal rich stellar populations than dwarfs in lower density environments, suggesting processes induced by rich clusters play an important role in dE formation. Several general galaxy cluster observations, including steep luminosity functions, and the origin of intracluster light, are natural outcomes of this delayed formation.

  11. RESIDUA UPGRADING EFFICIENCY IMPROVEMENT MODELS: COKE FORMATION PREDICTABILITY MAPS

    SciTech Connect (OSTI)

    John F. Schabron; A. Troy Pauli; Joseph F. Rovani Jr.

    2002-05-01T23:59:59.000Z

    The dispersed particle solution model of petroleum residua structure was used to develop predictors for pyrolytic coke formation. Coking Indexes were developed in prior years that measure how near a pyrolysis system is to coke formation during the coke formation induction period. These have been demonstrated to be universally applicable for residua regardless of the source of the material. Coking onset is coincidental with the destruction of the ordered structure and the formation of a multiphase system. The amount of coke initially formed appears to be a function of the free solvent volume of the original residua. In the current work, three-dimensional coke make predictability maps were developed at 400 C, 450 C, and 500 C (752 F, 842 F, and 932 F). These relate residence time and free solvent volume to the amount of coke formed at a particular pyrolysis temperature. Activation energies for two apparent types of zero-order coke formation reactions were estimated. The results provide a new tool for ranking residua, gauging proximity to coke formation, and predicting initial coke make tendencies.

  12. Rock Physics Characterization of Organic-Rich Shale Formations to Predict Organic Properties 

    E-Print Network [OSTI]

    Bush, Brandon

    2013-07-29T23:59:59.000Z

    Hydrocarbon production from organic-rich shale formations has significantly increased since the advent of sophisticated recovery techniques which allow for economical production from such formations. The primary formation properties that operators...

  13. Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2...

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

    Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Abstract: Understanding hydrogen formation on TiO2...

  14. Geochemical evidence for possible natural migration of Marcellus Formation brine to

    E-Print Network [OSTI]

    Geochemical evidence for possible natural migration of Marcellus Formation brine to shallow possible migration of Marcellus brine through naturally occurring pathways. The occurrences of saline water, because of natural hydraulic connections to deeper formations. formation water isotopes Marcellus Shale

  15. T:\\ClearanceEMEUConsumption\\cbecs\\pubuse89\\txt\\layouts&formats...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    128 XXSUPL. Hot water supplied HWSUPL4 130- 130 XXSUPL. PROGRAM TO CREATE FORMAT LIBRARY FOR THE 1989 CBECS DATA PROC FORMAT LIBRARYSASLIB; file:T|ClearanceEMEUConsumpti...

  16. On the star formation history of IZw 18

    E-Print Network [OSTI]

    F. Legrand

    1999-12-06T23:59:59.000Z

    It has been suggested that a continuous low star formation rate has been the dominant regime in IZw 18 and in dwarf galaxies for the lifetime of these objects (Legrand et al. 1999). Here, we discuss and model various star-forming histories for IZw 18. Particularly, we show that if the metallicity observed in IZw 18 results from starburst events only, the observed colors constrain the fraction of the metals ejected from the galaxy to be less than 50-70 %. We demonstrate that the continuous star formation scenario reproduces the observed parameters of IZw 18. A continuous star formation rate (SFR) of about 10E-4 Msol/yr during 14 Gyr reproduces precisely the observed abundances. This SFR is comparable with the lowest SFR observed in low surface brightness galaxies (van Zee et al. 1997). Generalized to all galaxies, the low continuous SFR scenario accounts for various facts: the presence of star formation in quiescent dwarfs and LSBG, the metallicity increase with time in the most underabundant DLA systems, and the metal content extrapolations to the outskirts of spiral galaxies. Also the apparent absence of galaxies with a metallicity lower than IZw 18, the apparent absence of HI clouds without optical counterparts, and the homogeneity of abundances in dwarfs galaxies are natural outcomes of the scenario. This implies that, even if starbursts are strong and important events in the life of galaxies, their more subdued but continuous star formation regime cannot be ignored when accounting for their chemical evolution.

  17. Modelling New Particle Formation Events in the South African Savannah

    SciTech Connect (OSTI)

    Gierens, Rosa; Laakso, Lauri; Mogensen, Ditte; Vakkari, Ville; Beukes, J. P.; Van Zyl, Pieter; Hakola, H.; Guenther, Alex B.; Pienaar, J. J.; Boy, Michael

    2014-01-01T23:59:59.000Z

    Africa is one of the less studied continents with respect to atmospheric aerosols. Savannahs are complex dynamic systems sensitive to climate and land-use changes, but the interaction with the atmosphere is not well understood. Atmospheric particles, aka aerosols, affect the climate on regional and global scale, and are an important factor in air quality. In this study measurements from a relatively clean savannah environment in South Africa were used to model new particle formation and growth. There are already some combined long-term measurements of trace gas concentrations together with aerosol and meteorological variables available, but to our knowledge this is the first time detailed simulations, that include all the main processes relevant to particle formation, were done. The results show that both investigated particle formation mechanisms overestimated the formation rates dependency on sulphuric acid. The approach including low volatile organic compounds to the particle formation process was more accurate in describing the nucleation events. To get reliable estimation of aerosol concentration in simulations for larger scales, nucleation mechanisms would need to include organic compounds, at least in southern Africa.

  18. Microchannel formation in seaice as habitat for microalgae

    E-Print Network [OSTI]

    K. Morawetz; S. Thoms; B. Kutschan

    2014-07-08T23:59:59.000Z

    The formation of saline brine channels in seaice is described by two coupled order parameters, the tetrahedricity as structure of ice and the salinity. Their evolution equations follow from a Ginzburg-Landau-functional in the form of a phase-field theory conserving salinity. The stability analysis provides the phase diagram in terms of two parameters, one describing the velocity of the freezing process and the other one characterizing the velocity of structure formation. In thermodynamics these parameters determine the supercooling or superheating region and the specific heat respectively. In contrast to the Turing model the diffusivity does not enter this phase diagram but determines only the structure size. The numerical solution shows a microstructure formation of brine inclusions in agreement with the measured samples dependent on the salinity and temperature.

  19. Cooling, Gravity and Geometry: Flow-driven Massive Core Formation

    E-Print Network [OSTI]

    Fabian Heitsch; Lee Hartmann; Adrianne D. Slyz; Julien E. G. Devriendt; Andreas Burkert

    2007-09-15T23:59:59.000Z

    We study numerically the formation of molecular clouds in large-scale colliding flows including self-gravity. The models emphasize the competition between the effects of gravity on global and local scales in an isolated cloud. Global gravity builds up large-scale filaments, while local gravity -- triggered by a combination of strong thermal and dynamical instabilities -- causes cores to form. The dynamical instabilities give rise to a local focusing of the colliding flows, facilitating the rapid formation of massive protostellar cores of a few 100 M$_\\odot$. The forming clouds do not reach an equilibrium state, though the motions within the clouds appear comparable to ``virial''. The self-similar core mass distributions derived from models with and without self-gravity indicate that the core mass distribution is set very early on during the cloud formation process, predominantly by a combination of thermal and dynamical instabilities rather than by self-gravity.

  20. Heating hydrocarbon containing formations in a line drive staged process

    DOE Patents [OSTI]

    Miller, David Scott (Katy, TX)

    2009-07-21T23:59:59.000Z

    Method for treating a hydrocarbon containing formation are described herein. Methods may include providing heat to a first section of the formation with one or more first heaters in the first section. First hydrocarbons may be heated in the first section such that at least some of the first hydrocarbons are mobilized. At least some of the mobilized first hydrocarbons may be produced through a production well located in a second section of the formation. The second section may be located substantially adjacent to the first section. A portion of the second section may be provided some heat from the mobilized first hydrocarbons, but is not conductively heated by heat from the first heaters. Heat may be provided to the second section with one or more second heaters in the second section to further heat the second section.

  1. The Formation of a Bubble from a Submerged Orifice

    E-Print Network [OSTI]

    Simmons, Jonathan A; Shikhmurzaev, Yulii D

    2015-01-01T23:59:59.000Z

    The formation of a single bubble from an orifice in a solid surface, submerged in an in- compressible, viscous Newtonian liquid, is simulated. The finite element method is used to capture the multiscale physics associated with the problem and to track the evolution of the free surface explicitly. The results are compared to a recent experimental analysis and then used to obtain the global characteristics of the process, the formation time and volume of the bubble, for a range of orifice radii; Ohnesorge numbers, which combine the material parameters of the liquid; and volumetric gas flow rates. These benchmark calculations, for the parameter space of interest, are then utilised to validate a selection of scaling laws found in the literature for two regimes of bubble formation, the regimes of low and high gas flow rates.

  2. Heating hydrocarbon containing formations in a spiral startup staged sequence

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Miller, David Scott (Katy, TX)

    2009-12-15T23:59:59.000Z

    Methods for treating a hydrocarbon containing formation are described herein. Methods may include treating a first zone of the formation. Treatment of a plurality of zones of the formation may be begun at selected times after the treatment of the first zone begins. The treatment of at least two successively treated zones may begin at a selected time after treatment of the previous zone begins. At least two of the successively treated zones may be adjacent to the zone treated previously. The successive treatment of the zones proceeds in an outward, substantially spiral sequence from the first zone so that the treatment of the zones may move substantially spirally outwards towards a boundary of the treatment area.

  3. Formation mechanisms of spatially-directed zincblende gallium nitride nanocrystals

    SciTech Connect (OSTI)

    Wood, A. W. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States); Collino, R. R. [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States); Cardozo, B. L. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States); Naab, F. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States); Wang, Y. Q. [Materials Science and Technology Division, Los Alamos National Lab, Los Alamos, New Mexico 87545 (United States); Goldman, R. S. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States); Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

    2011-12-15T23:59:59.000Z

    We report on the spatially selective formation of GaN nanocrystals embedded in GaAs. Broad-area N{sup +} implantation followed by rapid thermal annealing leads to the formation of nanocrystals at the depth of maximum ion damage. With additional irradiation using a Ga{sup +} focused ion beam, selective lateral positioning of the nanocrystals within the GaAs matrix is observed in isolated regions of increased vacancy concentration. Following rapid thermal annealing, the formation of zincblende GaN is observed in the regions of highest vacancy concentration. The nucleation of zincblende nanocrystals over the wurtzite phase of bulk GaN is consistent with the predictions of a thermodynamic model for the nanoscale size-dependence of GaN nucleation.

  4. Rapid Gas Hydrate Formation Processes: Will They Work?

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

    Brown, Thomas D.; Taylor, Charles E.; Bernardo, Mark P.

    2010-06-01T23:59:59.000Z

    Researchers at DOE’s National Energy Technology Laboratory (NETL) have been investigating the formation of synthetic gas hydrates, with an emphasis on rapid and continuous hydrate formation techniques. The investigations focused on unconventional methods to reduce dissolution, induction, nucleation and crystallization times associated with natural and synthetic hydrates studies conducted in the laboratory. Numerous experiments were conducted with various high-pressure cells equipped with instrumentation to study rapid and continuous hydrate formation. The cells ranged in size from 100 mL for screening studies to proof-of-concept studies with NETL’s 15-Liter Hydrate Cell. Results from this work demonstrate that the rapid and continuous formationmore »of methane hydrate is possible at predetermined temperatures and pressures within the stability zone of a Methane Hydrate Stability Curve.« less

  5. GAMMA RAYS FROM STAR FORMATION IN CLUSTERS OF GALAXIES

    SciTech Connect (OSTI)

    Storm, Emma M.; Jeltema, Tesla E.; Profumo, Stefano [Department of Physics, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States)

    2012-08-20T23:59:59.000Z

    Star formation in galaxies is observed to be associated with gamma-ray emission, presumably from non-thermal processes connected to the acceleration of cosmic-ray nuclei and electrons. The detection of gamma rays from starburst galaxies by the Fermi Large Area Telescope (LAT) has allowed the determination of a functional relationship between star formation rate and gamma-ray luminosity. Since star formation is known to scale with total infrared (8-1000 {mu}m) and radio (1.4 GHz) luminosity, the observed infrared and radio emission from a star-forming galaxy can be used to quantitatively infer the galaxy's gamma-ray luminosity. Similarly, star-forming galaxies within galaxy clusters allow us to derive lower limits on the gamma-ray emission from clusters, which have not yet been conclusively detected in gamma rays. In this study, we apply the functional relationships between gamma-ray luminosity and radio and IR luminosities of galaxies derived by the Fermi Collaboration to a sample of the best candidate galaxy clusters for detection in gamma rays in order to place lower limits on the gamma-ray emission associated with star formation in galaxy clusters. We find that several clusters have predicted gamma-ray emission from star formation that are within an order of magnitude of the upper limits derived in Ackermann et al. based on non-detection by Fermi-LAT. Given the current gamma-ray limits, star formation likely plays a significant role in the gamma-ray emission in some clusters, especially those with cool cores. We predict that both Fermi-LAT over the course of its lifetime and the future Cerenkov Telescope Array will be able to detect gamma-ray emission from star-forming galaxies in clusters.

  6. Exploitation and Optimization of Reservoir Performance in Hunton Formation, Oklahoma

    SciTech Connect (OSTI)

    Kelkar, Mohan

    2001-05-08T23:59:59.000Z

    This report presents the work done so far on Hunton Formation in West Carney Field in Lincoln County, Oklahoma. West Carney Field produces oil and gas from the Hunton Formation. The field was developed starting in 1995. Some of the unique characteristics of the field include decreasing water oil and ratio over time, decreasing gas-oil ratio at the beginning of production, inability to calculate oil reserves in the field based on long data, and sustained oil rates over long periods of time.

  7. Feedback Processes [in Massive Star Formation]: A Theoretical Perspective

    E-Print Network [OSTI]

    Mordecai-Mark Mac Low

    2007-11-26T23:59:59.000Z

    I review the evidence for the importance of feedback from massive stars at small and large scales. The feedback mechanisms include accretion luminosity, ionizing radiation, collimated outflows, and stellar winds. The good news is that feedback doesn't entirely prevent the formation of massive stars, while the bad news is that we don't know what does limit their masses. Feedback from massive stars also influences their surroundings. I argue that this does not produce a triggering efficiency above unity, nor does it prevent lots of prompt star formation in GMCs, though it may preserve massive remnants of the clouds for many dynamical times.

  8. Bow-shock induced star formation in the LMC?

    E-Print Network [OSTI]

    Klaas S. de Boer; Jochen M. Braun; Antonella Vallenari; Ulrich Mebold

    1997-11-06T23:59:59.000Z

    The structure of supergiant shells, in particular of LMC 4, is hard to explain with stochastic self-propagating star formation. A series of supergiant structures lies along the outer edge of the LMC and form a sequence increasing clockwise in age. We have considered the rotation of the LMC and its motion through the halo of the Milky Way and propose that these structures find their origin in star formation induced in the bow-shock formed at the leading edge of the LMC. Due to the rotation of the LMC these structures then move aside.

  9. The formation of gas bubbles at submerged orifices

    E-Print Network [OSTI]

    Hayes, William Bell

    1958-01-01T23:59:59.000Z

    . For values of Nc greater than 0.85, the formation and release of the bubbles appeared to occur almost simul? taneously. For the formation of bubbles at zero chamber volume and at low flow rates, the following equation was developed. (2) Ve * equilibrium... experimentally. The d determined for water (

  10. Method and apparatus for production of subsea hydrocarbon formations

    DOE Patents [OSTI]

    Blandford, J.W.

    1995-01-17T23:59:59.000Z

    A system for controlling, separating, processing and exporting well fluids produced from subsea hydrocarbon formations is disclosed. The subsea well tender system includes a surface buoy supporting one or more decks above the water surface for accommodating equipment to process oil, gas and water recovered from the subsea hydrocarbon formation. The surface buoy includes a surface-piercing central flotation column connected to one or more external flotation tanks located below the water surface. The surface buoy is secured to the sea bed by one or more tendons which are anchored to a foundation with piles imbedded in the sea bed. The system accommodates multiple versions on the surface buoy configuration. 20 figures.

  11. Constraints on Cluster Formation from Old Globular CLuster Systems

    E-Print Network [OSTI]

    Dean E. McLaughlin

    2000-02-03T23:59:59.000Z

    The properties of old globular cluster systems (GCSs) in galaxy halos offer unique insight into the physical processes that conspire to form any generic star cluster, at any epoch. Presented here is a summary of the information obtained from (1) the specific frequencies (total populations) and spatial structures (density vs. galactocentric radius) of GCSs in early-type galaxies, as they relate to the efficiency (or probability) of bound cluster formation, and (2) the fundamental role of a scaling between cluster mass and energy among Galactic globulars in setting their other structural correlations, and the possible implications for star formation efficiency as a function of mass in gaseous protoclusters.

  12. Method for maximizing shale oil recovery from an underground formation

    DOE Patents [OSTI]

    Sisemore, Clyde J. (Livermore, CA)

    1980-01-01T23:59:59.000Z

    A method for maximizing shale oil recovery from an underground oil shale formation which has previously been processed by in situ retorting such that there is provided in the formation a column of substantially intact oil shale intervening between adjacent spent retorts, which method includes the steps of back filling the spent retorts with an aqueous slurry of spent shale. The slurry is permitted to harden into a cement-like substance which stabilizes the spent retorts. Shale oil is then recovered from the intervening column of intact oil shale by retorting the column in situ, the stabilized spent retorts providing support for the newly developed retorts.

  13. Star Formation and the Growth of Stellar Mass

    E-Print Network [OSTI]

    Eric F. Bell; Xian Zhong Zheng; Casey Papovich; Andrea Borch; Christian Wolf; Klaus Meisenheimer

    2007-04-23T23:59:59.000Z

    Recent observations have demonstrated a significant growth in the integrated stellar mass of the red sequence since z=1, dominated by a steadily increasing number of galaxies with stellar masses M* 3x10^10 M_sun blue galaxies would also be overproduced; i.e., most of the new stars formed in blue cloud galaxies are in the massive galaxies. We explore a simple truncation scenario in which these `extra' blue galaxies have their star formation suppressed by an unspecified mechanism or mechanisms; simple cessation of star formation in these extra blue galaxies is approximately sufficient to build up the red sequence at M*<10^11 M_sun.

  14. Effect of friction on disoriented chiral condensate formation

    E-Print Network [OSTI]

    A. K. Chaudhuri

    1998-09-08T23:59:59.000Z

    We have investigated the effect of friction on the DCC domain formation. We solve the Newton equation of motion for the O(4) fields, with quenched initial condition. The initial fields are randomly distributed in a Gaussian form. In one dimensional expansion, on the average, large DCC domains can not be formed. However, in some particular orbits, large instabilities may occur. This possibility also greatly diminishes with the introduction of friction. But, if the friction is large, the system may be overdamped and then, there is a possibility of large DCC domain formation in some events.

  15. Method and apparatus for production of subsea hydrocarbon formations

    DOE Patents [OSTI]

    Blandford, Joseph W. (15 Mott La., Houston, TX 77024)

    1995-01-01T23:59:59.000Z

    A system for controlling, separating, processing and exporting well fluids produced from subsea hydrocarbon formations is disclosed. The subsea well tender system includes a surface buoy supporting one or more decks above the water surface for accommodating equipment to process oil, gas and water recovered from the subsea hydrocarbon formation. The surface buoy includes a surface-piercing central flotation column connected to one or more external floatation tanks located below the water surface. The surface buoy is secured to the seabed by one or more tendons which are anchored to a foundation with piles imbedded in the seabed. The system accommodates multiple versions on the surface buoy configuration.

  16. Optical pattern formation with a 2-level nonlinearity

    E-Print Network [OSTI]

    Camara, A; Labeyrie, G; Firth, W J; Oppo, G -L; Robb, G R M; Arnold, A S; Ackemann, T

    2015-01-01T23:59:59.000Z

    We present an experimental and theoretical investigation of spontaneous pattern formation in the transverse section of a single retro-reflected laser beam passing through a cloud of cold Rubidium atoms. In contrast to previously investigated systems, the nonlinearity at work here is that of a 2-level atom, which realizes the paradigmatic situation considered in many theoretical studies of optical pattern formation. In particular, we are able to observe the disappearance of the patterns at high intensity due to the intrinsic saturable character of 2-level atomic transitions.

  17. Solution mining and heating by oxidation for treating hydrocarbon containing formations

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Stegemeier, George Leo (Houston, TX)

    2009-06-23T23:59:59.000Z

    A method for treating an oil shale formation comprising nahcolite includes providing a first fluid to a portion of the formation. A second fluid is produced from the portion. The second fluid includes at least some nahcolite dissolved in the first fluid. A controlled amount of oxidant is provided to the portion of the formation. Hydrocarbon fluids are produced from the formation.

  18. Basics of Polar-Format algorithm for processing Synthetic Aperture Radar images.

    SciTech Connect (OSTI)

    Doerry, Armin Walter

    2012-05-01T23:59:59.000Z

    The purpose of this report is to provide a background to Synthetic Aperture Radar (SAR) image formation using the Polar Format (PFA) processing algorithm. This is meant to be an aid to those tasked to implement real-time image formation using the Polar Format processing algorithm.

  19. Volume 0 (1981), Number 0 pp. 114 COMPUTER GRAPHICS forum Collective Crowd Formation Transform with Mutual

    E-Print Network [OSTI]

    Deng, Zhigang

    1981-01-01T23:59:59.000Z

    pleasing group formation transition and control. Its core idea is to transform crowd formation shapesVolume 0 (1981), Number 0 pp. 1­14 COMPUTER GRAPHICS forum Collective Crowd Formation Transform of Houston, USA Abstract This paper introduces a new crowd formation transform approach to achieve visually

  20. The HI Mass-Star Formation Rate Relation and Self-Regulated Star Formation in Dwarf Galaxies

    E-Print Network [OSTI]

    Edward N Taylor

    2005-11-18T23:59:59.000Z

    We have developed a simple, static model designed to place a very solid lower limit on the star formation rate (SFR) expected in a dwarf disk galaxy, which leads to the prediction of a previously undocumented relation between HI mass, M_HI, and SFR. Over the mass range 10^8--10^10 M_sun, a wide variety of galaxies are observed to follow such a relation -- SFR ~ M_HI^1.4 -- with the same slope and similar scatter to our prediction. Within the model, this relation is a manifestation of self-regulating star formation (SF), in which the ISM is kept warm and stable by a UV interstellar radiation field (ISRF) that is maintained by constant regeneration of O--B stars. Regardless of the actual mode of star formation, it seems that the majority of dwarfs are presently forming stars in the same way.