Science.gov

Sample records for 20002 20007 25002

  1. Geology of a Portion of the Martian Highlands: MTMs -20002, -20007, -25002 and -25007

    NASA Technical Reports Server (NTRS)

    Fortezzo, C. M.; Williams, K. K.

    2009-01-01

    As part of a continuing study to understand the relationship between valleys and highland resurfacing through geologic mapping, we are continuing to map seven MTM quads in portions of the Margaritifer, Arabia, and Noachis Terrae. Results from this mapping will also help constrain the role and extent of past water in the region. The MTMs are grouped in two different areas: a 4-quadrangle area (-20002, -20007, -25002, -25007) and an L-shaped area (-15017, -20017, -20022) within the region [1-5]. This abstract focuses on the geologic units and history from mapping in the 4-quadrangle area, but includes a brief update on the L-shaped map area.

  2. Geologic Evolution of the Martian Highlands: MTMs -20002, -20007, -25002, and -25007

    NASA Technical Reports Server (NTRS)

    Fortezzo, C. M.; Williams, K. K.

    2008-01-01

    As part of a continuing study to understand the relationship between valleys and highland resurfacing through geologic mapping, the authors are continuing to map seven 1:500,000-scale MTM quads in portions of the Margaritifer, Arabia, and Noachis Terrae. Results from this mapping will also help constrain the role and extent of past water in the region. The MTMs are grouped in two different areas within the region and compliment previous mapping in adjacent areas. Three western quads focus on Jones crater and the Himera, Samara, and Loire Valles systems. This abstract focuses on the four eastern quads wherein a large, ancient impact structure, Noachis basin, is flanked on its south and east by a series of valley networks. A solitary valley drains this basin and stretches north-northeast for approximately 450 km, transporting materials into Arabia Terra. Pertinent raster and vector data have been imported and registered using ESRI's ArcMap GIS software. To inspect and quantify stratigraphic relations, crater counts are being compiled in ESRI's ArcView GIS software to make use of crater counting tools specifically developed for planetary mappers. New datasets from the Mars Reconnaissance Orbiter including 4 CTX images, 31 CRISM multi-spectral pushbroom images, and 4 HiRISE images were incorporated into the project during the third year. The CRISM dataset uses summary parameters with thresholds to select targets for the high-resolution datasets. The befit for mappers is the extensive coverage and general compositional information. Results of a cursory analysis show strong mafic absorptions on the floors of Peta crater and Noachis basin. LCP absorptions occur more often than olivine, however, olivine tends to be denser than both pyroxenes. Olivine and HCP mat indicate relatively younger rocks, which is supported by the occurrence of wrinkle ridges associated with high olivine and HCP absorptions in the Peta crater and Noachis basin floors.

  3. 30 CFR 57.20002 - Potable water.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Potable water. 57.20002 Section 57.20002....20002 Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped...

  4. 30 CFR 57.20002 - Potable water.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Potable water. 57.20002 Section 57.20002....20002 Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped...

  5. 30 CFR 57.20002 - Potable water.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Potable water. 57.20002 Section 57.20002....20002 Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped...

  6. 30 CFR 57.20002 - Potable water.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Potable water. 57.20002 Section 57.20002....20002 Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped...

  7. 30 CFR 57.20002 - Potable water.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Potable water. 57.20002 Section 57.20002....20002 Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped...

  8. 47 CFR 1.20002 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Definitions. 1.20002 Section 1.20002 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Communications Assistance for Law Enforcement Act § 1.20002 Definitions. For purposes of this subpart: (a) Appropriate legal authorization....

  9. 30 CFR 56.20002 - Potable water.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Potable water. 56.20002 Section 56.20002... Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped or poured...

  10. 30 CFR 56.20002 - Potable water.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Potable water. 56.20002 Section 56.20002... Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped or poured...

  11. 30 CFR 56.20002 - Potable water.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Potable water. 56.20002 Section 56.20002... Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped or poured...

  12. 30 CFR 56.20002 - Potable water.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Potable water. 56.20002 Section 56.20002... Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped or poured...

  13. 30 CFR 56.20002 - Potable water.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Potable water. 56.20002 Section 56.20002... Potable water. (a) An adequate supply of potable drinking water shall be provided at all active working areas. (b) The common drinking cup and containers from which drinking water must be dipped or poured...

  14. 47 CFR 1.20002 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... enforcement agency; e.g., the Federal Bureau of Investigation or a local police department. (e... Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection Communications Assistance for Law Enforcement Act § 1.20002 Definitions. For purposes of this subpart:...

  15. 47 CFR 1.20002 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... enforcement agency; e.g., the Federal Bureau of Investigation or a local police department. (e... Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection Communications Assistance for Law Enforcement Act § 1.20002 Definitions. For purposes of this subpart:...

  16. 47 CFR 1.20002 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... carrier authorization. (d) LEA. The term LEA means law enforcement agency; e.g., the Federal Bureau of... Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Communications Assistance for Law Enforcement Act § 1.20002 Definitions. For purposes of this subpart: (a) Appropriate legal authorization....

  17. 47 CFR 1.20002 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... enforcement agency; e.g., the Federal Bureau of Investigation or a local police department. (e... Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection Communications Assistance for Law Enforcement Act § 1.20002 Definitions. For purposes of this subpart:...

  18. 47 CFR 1.20007 - Additional assistance capability requirements for wireline, cellular, and PCS telecommunications...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Additional assistance capability requirements for wireline, cellular, and PCS telecommunications carriers. 1.20007 Section 1.20007 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection Communications Assistance for Law Enforcement Act...

  19. 47 CFR 1.20007 - Additional assistance capability requirements for wireline, cellular, and PCS telecommunications...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Additional assistance capability requirements for wireline, cellular, and PCS telecommunications carriers. 1.20007 Section 1.20007 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection Communications Assistance for Law Enforcement Act...

  20. An optimal user-interface for EPIMS database conversions and SSQ 25002 EEE parts screening

    NASA Technical Reports Server (NTRS)

    Watson, John C.

    1996-01-01

    The Electrical, Electronic, and Electromechanical (EEE) Parts Information Management System (EPIMS) database was selected by the International Space Station Parts Control Board for providing parts information to NASA managers and contractors. Parts data is transferred to the EPIMS database by converting parts list data to the EP1MS Data Exchange File Format. In general, parts list information received from contractors and suppliers does not convert directly into the EPIMS Data Exchange File Format. Often parts lists use different variable and record field assignments. Many of the EPES variables are not defined in the parts lists received. The objective of this work was to develop an automated system for translating parts lists into the EPIMS Data Exchange File Format for upload into the EPIMS database. Once EEE parts information has been transferred to the EPIMS database it is necessary to screen parts data in accordance with the provisions of the SSQ 25002 Supplemental List of Qualified Electrical, Electronic, and Electromechanical Parts, Manufacturers, and Laboratories (QEPM&L). The SSQ 2S002 standards are used to identify parts which satisfy the requirements for spacecraft applications. An additional objective for this work was to develop an automated system which would screen EEE parts information against the SSQ 2S002 to inform managers of the qualification status of parts used in spacecraft applications. The EPIMS Database Conversion and SSQ 25002 User Interfaces are designed to interface through the World-Wide-Web(WWW)/Internet to provide accessibility by NASA managers and contractors.

  1. Abstracts of the Annual Meeting of Planetary Geologic Mappers, San Antonio, TX, 2009

    NASA Technical Reports Server (NTRS)

    Bleamaster, Leslie F., III (Editor); Tanaka, Kenneth L.; Kelley, Michael S.

    2009-01-01

    Topics covered include: Geologic Mapping of the Beta-Atla-Themis (BAT) Region of Venus: A Progress Report; Geologic Map of the Snegurochka Planitia Quadrangle (V-1): Implications for Tectonic and Volcanic History of the North Polar Region of Venus; Preliminary Geological Map of the Fortuna Tessera (V-2) Quadrangle, Venus; Geological Map of the Fredegonde (V-57) Quadrangle, Venus; Geological Mapping of the Lada Terra (V-56) Quadrangle, Venus; Geologic Mapping of V-19; Lunar Geologic Mapping: A Preliminary Map of a Portion of the LQ-10 ("Marius") Quadrangle; Geologic Mapping of the Lunar South Pole, Quadrangle LQ-30: Volcanic History and Stratigraphy of Schr dinger Basin; Geologic Mapping along the Arabia Terra Dichotomy Boundary: Mawrth Vallis and Nili Fossae, Mars; Geologic Mapping Investigations of the Northwest Rim of Hellas Basin, Mars; Geologic Mapping of the Meridiani Region of Mars; Geology of a Portion of the Martian Highlands: MTMs -20002, -20007, -25002 and -25007; Geologic Mapping of Holden Crater and the Uzboi-Ladon-Morava Outflow System; Mapping Tyrrhena Patera and Hesperia Planum, Mars; Geologic Mapping of Athabaca Valles; Geologic Mapping of MTM -30247, -35247 and -40247 Quadrangles, Reull Vallis Region, Mars Topography of the Martian Impact Crater Tooting; Mars Structural and Stratigraphic Mapping along the Coprates Rise; Geology of Libya Montes and the Interbasin Plains of Northern Tyrrhena Terra, Mars: Project Introduction and First Year Work Plan; Geology of the Southern Utopia Planitia Highland-Lowland Boundary Plain: Second Year Results and Third Year Plan; Mars Global Geologic Mapping: About Half Way Done; New Geologic Map of the Scandia Region of Mars; Geologic Mapping of the Medusae Fossae Formation on Mars and the Northern Lowland Plains of Venus; Volcanism on Io: Insights from Global Geologic Mapping; and Planetary Geologic Mapping Handbook - 2009.

  2. Abstracts of the Annual Meeting of Planetary Geologic Mappers, Flagstaff, AZ, 2008

    NASA Technical Reports Server (NTRS)

    Bleamaster, Leslie F., III (Editor); Tanaka, Kenneth L. (Editor); Kelley, Michael S. (Editor)

    2008-01-01

    Topics discussed include: Merging of the USGS Atlas of Mercury 1:5,000,000 Geologic Series; Geologic Mapping of the V-36 Thetis Regio Quadrangle: 2008 Progress Report; Structural Maps of the V-17 Beta Regio Quadrangle, Venus; Geologic Mapping of Isabella Quadrangle (V-50) and Helen Planitia, Venus; Renewed Mapping of the Nepthys Mons Quadrangle (V-54), Venus; Mapping the Sedna-Lavinia Region of Venus; Geologic Mapping of the Guinevere Planitia Quadrangle of Venus; Geological Mapping of Fortuna Tessera (V-2): Venus and Earth's Archean Process Comparisons; Geological Mapping of the North Polar Region of Venus (V-1 Snegurochka Planitia): Significant Problems and Comparisons to the Earth's Archean; Venus Quadrangle Geological Mapping: Use of Geoscience Data Visualization Systems in Mapping and Training; Geologic Map of the V-1 Snegurochka Planitia Quadrangle: Progress Report; The Fredegonde (V-57) Quadrangle, Venus: Characterization of the Venus Midlands; Formation and Evolution of Lakshmi Planum (V-7), Venus: Assessment of Models using Observations from Geological Mapping; Geologic Map of the Meskhent Tessera Quadrangle (V-3), Venus: Evidence for Early Formation and Preservation of Regional Topography; Geological Mapping of the Lada Terra (V-56) Quadrangle, Venus: A Progress Report; Geology of the Lachesis Tessera Quadrangle (V-18), Venus; Geologic Mapping of the Juno Chasma Quadrangle, Venus: Establishing the Relation Between Rifting and Volcanism; Geologic Mapping of V-19, V-28, and V-53; Lunar Geologic Mapping Program: 2008 Update; Geologic Mapping of the Marius Quadrangle, the Moon; Geologic Mapping along the Arabia Terra Dichotomy Boundary: Mawrth Vallis and Nili Fossae, Mars: Introductory Report; New Geologic Map of the Argyre Region of Mars; Geologic Evolution of the Martian Highlands: MTMs -20002, -20007, -25002, and -25007; Mapping Hesperia Planum, Mars; Geologic Mapping of the Meridiani Region, Mars; Geology of Holden Crater and the Holden and Ladon Multi

  3. 48 CFR 25.002 - Applicability of subparts.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... Subpart Supplies for use Inside U.S. Outside U.S. Construction Inside U.S. Outside U.S. Servicesperformed Inside U.S. Outside U.S. 25.1 Buy American Act—Supplies X 25.2 Buy American Act—Construction Materials X...—Construction Materials X 25.7 Prohibited Sources X X X X X X 25.8 Other International Agreements...

  4. 48 CFR 25.002 - Applicability of subparts.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... Subpart Supplies for use Inside U.S. Outside U.S. Construction Inside U.S. Outside U.S. Servicesperformed Inside U.S. Outside U.S. 25.1Buy American—Supplies X 25.2Buy American—Construction Materials X 25... Offers—Supply Contracts X X 25.6American Recovery and Reinvestment Act—Buy American...

  5. 48 CFR 25.002 - Applicability of subparts.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... Subpart Supplies for use Inside U.S. Outside U.S. Construction Inside U.S. Outside U.S. Servicesperformed Inside U.S. Outside U.S. 25.1 Buy American Act—Supplies X 25.2 Buy American Act—Construction Materials X...—Construction Materials X 25.7 Prohibited Sources X X X X X X 25.8 Other International Agreements...

  6. 48 CFR 25.002 - Applicability of subparts.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    .... Subpart Supplies for use Inside U.S. Outside U.S. Construction Inside U.S. Outside U.S. Servicesperformed Inside U.S. Outside U.S. 25.1 Buy American Act—Supplies X 25.2 Buy American Act—Construction Materials X...—Construction Materials X 25.7 Prohibited Sources X X X X X X 25.8 Other International Agreements...

  7. 48 CFR 25.002 - Applicability of subparts.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    .... Subpart Supplies for use Inside U.S. Outside U.S. Construction Inside U.S. Outside U.S. Servicesperformed Inside U.S. Outside U.S. 25.1 Buy American Act—Supplies X 25.2 Buy American Act—Construction Materials X...—Construction Materials X 25.7 Prohibited Sources X X X X X X 25.8 Other International Agreements...

  8. 77 FR 20007 - Proposed Information Collection; Comment Request; Property Management

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-03

    ... Economic Development Administration Proposed Information Collection; Comment Request; Property Management... recipient must request in writing EDA's approval to undertake an incidental use of property acquired or... information allows EDA to determine whether an incidental use of property acquired or improved with...

  9. 75 FR 20002 - Importer of Controlled Substances; Notice of Registration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... 23, 2009, and published in the Federal Register on December 2, 2009 (74 FR 63156), Mylan Pharmaceuticals Inc., 781 Chestnut Ridge Road, Morgantown, West Virginia 26505, made application by letter to...

  10. 47 CFR 1.20007 - Additional assistance capability requirements for wireline, cellular, and PCS telecommunications...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Communications Assistance for Law... dialing or signaling information that identifies the origin, direction, destination, or termination of each communication generated or received by a subscriber by means of any equipment, facility,...

  11. 75 FR 20007 - Advisory Committee for Education and Human Resources; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... Advisory Committee for Education and Human Resources; Notice of Meeting In accordance with the Federal... following meeting: Name: Advisory Committee for Education and Human Resources ( 1119). Date/Time: May 5..., engineering, and mathematics (STEM) education and human resources programming. Agenda May 5, 2010 I....

  12. 75 FR 20007 - Proposal Review Panel for Chemistry; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... Proposal Review Panel for Chemistry; Notice of Meeting In accordance with the Federal Advisory Committee... by NSF Division of Chemistry (1191). Dates & Times: May 9, 2010; 8 p.m.-9 p.m., May 10, 2010; 8 a.m.- 9 p.m., May 11, 2010; 8 a.m.-1 p.m. Place: Department of Chemistry, California Institute...

  13. 75 FR 25002 - Notice of Applications for Deregistration Under Section 8(f) of the Investment Company Act of 1940

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-06

    ... COMMISSION Notice of Applications for Deregistration Under Section 8(f) of the Investment Company Act of 1940 April 30, 2010. The following is a notice of applications for deregistration under section 8(f) of the... Commission, 100 F Street, NE., Washington, DC 20549-1090. FOR FURTHER INFORMATION CONTACT: Diane L. Titus...

  14. 76 FR 20007 - 60-Day Notice of Intention To Request Clearance of Collection of Information; Opportunity for...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-11

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE INTERIOR National Park Service 60-Day Notice of Intention To Request Clearance of Collection of Information; Opportunity for Public Comment AGENCY: National Park Service, Interior. ACTION: Notice; request for...

  15. 75 FR 20007 - The Merit Systems Protection Board (MSPB) Is Providing Notice of the Opportunity To File Amicus...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... From the Federal Register Online via the Government Publishing Office MERIT SYSTEMS PROTECTION BOARD The Merit Systems Protection Board (MSPB) Is Providing Notice of the Opportunity To File Amicus... consider the appeal under 5 U.S.C. Chapter 75, given that the scope of a Chapter 75 appeal is broader...

  16. 75 FR 20002 - Notice Pursuant to the National Cooperative Research and Production Act of 1993-OpenSAF Foundation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... Act on October 22, 2009 (74 FR 54594). Patricia A. Brink, Deputy Director of Operations, Antitrust... Antitrust Division Notice Pursuant to the National Cooperative Research and Production Act of 1993--OpenSAF... Cooperative Research and Production Act of 1993, 15 U.S.C. 4301 et seq. (``the Act''), OpenSAF Foundation...

  17. 75 FR 20002 - Notice Pursuant to the National Cooperative Research and Production Act of 1993 Joint Venture...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    .... (``the Act''), the Joint Venture under TIP Award Number: 7ONANB1OHOO1 (``Brewer-Swent'') has filed... Antitrust Division Notice Pursuant to the National Cooperative Research and Production Act of 1993 Joint Venture Under Tip Award Number: 7ONANB1OHOO1 Notice is hereby given that, on February 3, 2010, pursuant...

  18. Following the Cantabrian (Ventaniella) fault into the Bay of Biscay: a deeply incised canyon, a change of trend, and 20002 km of unstable continental slope

    NASA Astrophysics Data System (ADS)

    Fernandez Viejo, G.; Lopez-Fernandez, C.; Dominguez-Cuesta, M.

    2012-12-01

    The Cantabrian fault, known traditionally with the local name of Ventaniella fault is a long-lived rectilinear feature that runs in a NW-SE direction for more than 200 km across northwest Spain. Its origins are linked to the end of the Variscan orogeny, but its important role took place during the extensional processes of the Mesozoic that led Iberia to become a microplate separated from Europe and Africa. With the initiation of the alpine orogeny Iberia converges with Europe pushed from the south by Africa, and the Ventaniella fault acted as a dextral strike slip fault with an important reverse component. It has a relatively low topographic expression, although its NE block is slightly uplifted with respect to the SW one. Traditionally it has been mapped offshore following the trace of the Aviles canyon, a deeply incised canyon 7 miles from the coast, oblique to the E-W coast trend and which descents from 160 m in the continental shelf , down to 4750 m in the abyssal plain of the Bay of Biscay . All this incision occurs along just 50 km length of the narrow continental shelf in this area, making the Aviles canyon one of the steepest in the Atlantic. Through seismic reflection lines across the continental shelf and slope, a bathymetric model up to date and a 3D geological model the fault has been mapped into the sea integrating the seismicity associated to its SW block and the newest geological mapping on land. At the same time, what is observed in the northwest prolongation and termination of the fault against the oceanic crust of the abyssal plain is a continental slope that is full of mass-wasting processes along more than 80 km length, showing gravitational and submarine slide processes in an area that roughly occupies 2000 km 2 and involves a volume of unstable mass estimated in more than 1000 km3 . One of the biggest displaced masses made the Aviles canyon change its trend to N-S in an almost 90° bend close to the middle slope. Although the displaced masses are big, it does not seem to pose an immediate hazard, as they all show a short run-out distance and, being the actual seismicity of low grade, it is not enough to trigger the fall of the unstable slope. The Ventaniella fault runs in the continental shelf and slope in NW-SE direction, but it also has been deduced with the new data a secondary fault trace slightly more W-E, interpreted as a termination in horsetail of the main strike-slip feature. Both structures seem to be responsible for the seismicity and the mass wasting processes observed along this strip of the Cantabrian margin.

  19. [Phylogenetic diversity and cold-adaptive hydrolytic enzymes of culturable psychrophilic bacteria associated with sea ice from high latitude ocean, Artic].

    PubMed

    Yu, Yong; Li, Hui-Rong; Chen, Bo; Zeng, Yin-Xin; He, Jian-Feng

    2006-04-01

    The phylogenetic diversity of culturable psychrophilic bacteria associated with sea ice from high latitude sea (77 degrees 30'N - 81 degrees 12'N), Canadian Basin and Greenland sea Arctic, was investigated. A total of 37 psychrophilic strains were isolated using three different methods of ( i ) spread plate method: 100 microL of each dilution ice-melt sample was spreaded onto the surface of Marine 2216 agar (DIFCO laboratories, Detroit, MI) and incubated for 2 to 6 weeks at 4 degrees C; ( ii ) bath culture and spread plate method: 1 mL of sample was added to 9mL of NSW (unamended natural seawater, 0.2 microm prefiltered and autoclaved) and incubated for 1 months at - 1 degrees C, then spread plate method was used to isolate bacterial strains from the pre-cultured samples; ( iii ) cold shock, bath culture and spread plate method: samples were exposed to - 20 degrees C for 24h, then bacterial strains isolated by bath culture and spread plate method under aerobic conditions. Nearly half of psychrophilic strains are isolated by using method iii . 16S rDNA nearly full-length sequence analysis reveal that psychrophilic strains fall in two phylogenetic divisions, gamma-proteobacteria (in the genera Colwellia, Marinobacter, Shewanella, Thalassomonas, Glaciecola, Marinomonas and Pseudoalteromonas) and Cytophaga-Flexibacter-Bacteroides (in the genera Flavobacterium and Psychroflexus). Nine of bacterial isolates (BSi20007, BSi20497, BSi20517, BSi20537, BSi20170, BSi20001, BSi20002, BSi20675 and BSi20101) quite likely represent novel species (16S rDNA sequence similarity below 97%). One of strains (BSi20002) from Canadian Basin shows 100% sequence similarity to the Antarctic Weddell sea ice isolate Marinobacter sp. ANT8277, suggesting bacteria may have a bipolar distribution at the species level. AF283859 sequences were submitted to the BLAST search program of the National Center for Biotechnology Information website (NCBI, http://www. ncbi. nlm.nih. gov). Twenty sequences

  20. 75 FR 54389 - Request for Comments-LSC Budget Request for FY 2012

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-07

    ... request should be. DATES: Written comments must be received on or before September 10, 2010. ADDRESSES... Corporation, 3333 K St., NW., Washington, DC 20007; 202-295-1630 phone); 202-337-6834 (fax); david.richardson..., 3333 K St., NW., Washington, DC 20007; 202-295- 1510 (phone); 202-337-6834 (fax);...

  1. 76 FR 22865 - Action Affecting Export Privileges; Orion Air, S.L. and Syrian Pearl Airlines

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-25

    ... a 180-day renewal Order on April 29, 2010.\\2\\ \\1\\ 74 FR 24,786. \\2\\ The November 2, 2009 renewal Order was published in the Federal Register on November 9, 2009 (74 FR 57,626). The April 29, 2010 renewal Order was published in the Federal Register on May 7, 2010 (75 FR 25,002). Most recently,...

  2. 75 FR 15376 - Direct-to-Consumer Prescription Drug Advertisements; Presentation of the Major Statement in...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-29

    ... Register of May 6, 1998 (63 FR 24996 at 25002), FTC summarized the factors it takes into account in... these services to avoid the abuse of consumers. In the Federal Register of August 9, 1993 (58 FR 42364... prescription drug television broadcast advertisements (72 FR 47051, August 22, 2007). FDA recognizes...

  3. 76 FR 23325 - National Institute of Diabetes and Digestive and Kidney Diseases; Notice of Closed Meetings

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-26

    ... Jefferson Davis Hwy, Arlington, VA 22202. Contact Person: Michael W. Edwards, PhD, Scientific Review Officer... applications. Place: Georgetown Suites, 1000 29th Street, NW., Washington, DC 20007 Contact Person: Thomas...

  4. 77 FR 27801 - Notice of Proposed Revisions for the LSC Grant Assurances for Calendar Year 2013 Funding

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-11

    ... Corporation, 3333 K Street NW., Third Floor, Washington, DC 20007, Attention: Reginald Haley; and (4) fax comments to 202.337.6813. FOR FURTHER INFORMATION CONTACT: Reginald J. Haley; Office of Program...

  5. Citizen's Guide to Pest Control and Pesticide Safety

    MedlinePlus

    ... DC 20002 202-535-2280 Florida Division of Agricultural Environmental Services Florida Department of Agriculture and Consumer ... 96814-2512 808-973-9415 Idaho Division of Agricultural Resources Idaho Department of Agriculture P.O. Box ...

  6. 78 FR 61871 - Advisory Committee on Cemeteries and Memorials, Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-04

    ..., and potential agenda topics. Time will be allocated for receiving public comments at 1 p.m. on both...., Washington, DC 20002, or by email at Michael.n@va.gov . In the public's communications with the...

  7. The epidemiology of dengue in the americas over the last three decades: a worrisome reality.

    PubMed

    San Martín, José Luis; Brathwaite, Olivia; Zambrano, Betzana; Solórzano, José Orlando; Bouckenooghe, Alain; Dayan, Gustavo H; Guzmán, María G

    2010-01-01

    We have reported the epidemic patterns of dengue disease in the Region of the Americas from 1980 through 2007. Dengue cases reported to the Pan American Health Organization were analyzed from three periods: 1980-1989 (80s), 1990-1999 (90s), and 2000-2007 (2000-7). Age distribution data were examined from Brazil, Venezuela, Honduras, and Mexico. Cases increased over time: 1,033,417 (80s) to 2,725,405 (90s) to 4,759,007 (2000-7). The highest concentrations were reported in the Hispanic Caribbean (39.1%) in the 80s shifting to the Southern Cone in the 90s (55%) and 2000-7 (62.9%). From 1980 through 1987, 242 deaths were reported compared with 1,391 during 2000-7. The most frequently isolated serotypes were DENV-1 and DENV-2 (90s) and DENV-2 and DENV-3 (2000-7). The highest incidence was observed among adolescents and young adults; dengue hemorrhagic fever incidence was highest among infants in Venezuela. Increasing dengue morbidity/mortality was observed in the Americas in recent decades.

  8. Doctoral Projects in Progress in Theatre Arts, 1983.

    ERIC Educational Resources Information Center

    Hill, Philip G.

    1983-01-01

    Thirty-first annual listing of dissertations arranged by subject according to geographical divisions. Entries include researchers's name, title of project, institution, academic department, faculty supervisor, and expected date of completion. Available from American Theatre Assoc. 1010 Wisconsin Ave., N.W., Suite 630, Washington, D.C. 20007; sc…

  9. 75 FR 4844 - Chesapeake and Ohio Canal National Historical Park Advisory Commission; Notice of Public Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-29

    ... Advisory Commission will be held at 9 a.m., on Friday, February 12, 2010, at the House of Sweden, 2900 K Street, NW., Washington, DC 20007. DATES: Friday, February 12, 2010. ADDRESSES: House of Sweden, 2900, 2900 K Street, NW., Washington, DC. FOR FURTHER INFORMATION CONTACT: Kevin Brandt,...

  10. 75 FR 62591 - Oral Argument

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-12

    ... invited amicus curiae to submit briefs in these matters, see 75 FR 20007, Apr. 16, 2010; 75 FR 29366, May... given of the scheduling of oral argument in the matters of: Hyginus U. Aguzie v. Office of Personnel Management, MSPB Docket Number DC-0731-09-0261-R-1; Jenee Ella Hunt-O'Neal v. Office of Personnel...

  11. 75 FR 29366 - Hyginus U. Aguzie v. Office of Personnel Management

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-25

    ... 75 FR 20007) that interested parties may submit amicus briefs or other comments on this issue no... which parties may file amicus briefs in the matter of Hyginus U. Aguzie v. Office of Personnel Management, MSPB Docket Number DC-0731-09-0261-R-1. DATES: All briefs submitted in response to this...

  12. 76 FR 13135 - Intent To Grant an Exclusive License for a U.S. Government-Owned Invention

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-10

    ... Department of the Army Intent To Grant an Exclusive License for a U.S. Government-Owned Invention AGENCY: Department of the Army, DoD. ACTION: Notice. SUMMARY: In accordance with 35 U.S.C. 209(e), and 37 CFR 404.7... business at 1010 Wisconsin Avenue, Suite 310, Washington, DC 20007-3680. ADDRESSES: Commander, U.S....

  13. 77 FR 34964 - Notice of Issuance of Final Determination Concerning Toshiba E-Studio Multi-Function Peripherals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-12

    ... 20007-5109 RE: U.S. Government Procurement; Country of Origin of Toshiba e-Studio Multi-function... SECURITY U.S. Customs and Border Protection Notice of Issuance of Final Determination Concerning Toshiba E... certain Toshiba e-Studio Multi-function Peripherals (MFPs), which perform imaging, scanning, faxing,...

  14. 76 FR 17459 - Sunshine Act Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-29

    ... (202) 295-1500. Questions may be sent by electronic mail to FR_NOTICE_QUESTIONS@lsc.gov . SPECIAL NEEDS... notify Katherine Ward, at (202) 295-1500 or FR_NOTICE_QUESTIONS@lsc.gov . Dated: March 24, 2011. Victor M... Street, NW., Washington, DC 20007. PUBLIC OBSERVATION: Unless otherwise noticed, all meetings of the...

  15. 45 CFR 1602.5 - Public reading room.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false Public reading room. 1602.5 Section 1602.5 Public... DISCLOSURE OF INFORMATION UNDER THE FREEDOM OF INFORMATION ACT § 1602.5 Public reading room. (a) The Corporation will maintain a public reading room its office at 3333 K St. NW., Washington, DC, 20007. This...

  16. 45 CFR 1602.5 - Public reading room.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 4 2012-10-01 2012-10-01 false Public reading room. 1602.5 Section 1602.5 Public... DISCLOSURE OF INFORMATION UNDER THE FREEDOM OF INFORMATION ACT § 1602.5 Public reading room. (a) The Corporation will maintain a public reading room its office at 3333 K St. NW., Washington, DC, 20007. This...

  17. 45 CFR 1602.5 - Public reading room.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 4 2013-10-01 2013-10-01 false Public reading room. 1602.5 Section 1602.5 Public... DISCLOSURE OF INFORMATION UNDER THE FREEDOM OF INFORMATION ACT § 1602.5 Public reading room. (a) The Corporation will maintain a public reading room its office at 3333 K St. NW., Washington, DC, 20007. This...

  18. 45 CFR 1602.5 - Public reading room.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 4 2014-10-01 2014-10-01 false Public reading room. 1602.5 Section 1602.5 Public... DISCLOSURE OF INFORMATION UNDER THE FREEDOM OF INFORMATION ACT § 1602.5 Public reading room. (a) The Corporation will maintain a public reading room its office at 3333 K St. NW., Washington, DC, 20007. This...

  19. 45 CFR 1602.5 - Public reading room.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 4 2011-10-01 2011-10-01 false Public reading room. 1602.5 Section 1602.5 Public... DISCLOSURE OF INFORMATION UNDER THE FREEDOM OF INFORMATION ACT § 1602.5 Public reading room. (a) The Corporation will maintain a public reading room its office at 3333 K St. NW., Washington, DC, 20007. This...

  20. 78 FR 64984 - Distribution of the 2000, 2001, 2002 and 2003 Cable Royalty Funds

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-30

    ... proceedings relating to cable retransmission royalties for royalty years 2000 through 2003. 76 FR 7590 (Feb... FR 26798 (May 12, 2010). IPG challenged the category definitions; the Judges rejected IPG's challenge..., Order, in Docket No. 2000-2 CARP CD 93-97, 66 FR 66433, 66444 (Dec. 26, 2001) (quoting H.R. Rep....

  1. 76 FR 9811 - Notice Pursuant to the National Cooperative Research and Production Act Of 1993-OpenSAF Foundation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-22

    ... published a notice in the Federal Register pursuant to Section 6(b) of the Act on May 16, 2008 (73 FR 28508... Federal ] Register pursuant to Section 6(b) of the Act April 16, 2010 (75 FR 20002). Patricia A. Brink... specified circumstances. Specifically, MontaVista Software LLC, Santa Clara, CA, has been added as a...

  2. 78 FR 31614 - Corporate Administration Committee Board of Directors Meeting; Sunshine Act

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-24

    ... From the Federal Register Online via the Government Publishing Office NEIGHBORHOOD REINVESTMENT CORPORATION Corporate Administration Committee Board of Directors Meeting; Sunshine Act TIME & DATE: 11:00 a.m., Thursday, May 24, 2012, PLACE: 999 North Capitol St. NE., Suite 800, Boardroom, Washington, DC 20002. STATUS: Open. CONTACT PERSON FOR...

  3. 76 FR 23861 - Documents Acceptable for Employment Eligibility Verification; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-29

    ... Register on April 15, 2011. The e-mail address referenced in the final rule should read `` E-verify@dhs.gov..., NE., Suite 200, Washington, DC 20002, telephone (888) 464-4218 or e-mail at E-verify@dhs.gov... a final rule in the Federal Register at 76 FR 21225 establishing Documents Acceptable for...

  4. 78 FR 36794 - Regular Board of Directors Meeting; Sunshine Act

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-19

    ... From the Federal Register Online via the Government Publishing Office NEIGHBORHOOD REINVESTMENT CORPORATION Regular Board of Directors Meeting; Sunshine Act TIME AND DATE: 9:30 a.m., Tuesday, June 25, 2013. PLACE: 999 North Capitol St NE., Suite 900, Gramlich Boardroom, Washington, DC 20002. STATUS:...

  5. Prediction of the Localized Necking under Non-Proportional Strain Paths by M-K Theory and FE Analyses

    NASA Astrophysics Data System (ADS)

    Ahn, Deok Chan; Chung, Yang Jin; Won, Seong Yeon; Kim, Kwang Yuk

    2010-06-01

    The localized necking under non-proportional strain paths was investigated using M-K theory and finite element analyses. The strain paths were calculated from finite element simulations and used for input data in the prediction of necking with M-K model and Yld2000-2d yield function. For the verification, square cup drawing tests with a ferritic stainless steel sheet were carried out numerically and experimentally. The predicted results showed good agreement with experiments.

  6. 75 FR 27512 - Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Section 110...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-17

    ... Columbia 20002. FOR FURTHER INFORMATION CONTACT: Rose Quinto, (215) 814-2182, or by e- mail at quinto.rose... ozone NAAQS (62 FR 38856) and a new PM 2.5 NAAQS (62 FR 38652). The revised ozone NAAQS is based on 8..., and the level of the NAAQS was changed from 0.12 parts per million (ppm) to 0.08 ppm. The new PM...

  7. Material Modeling of 6000 Series Aluminum Alloy Sheets with Different Density Cube Textures and Effect on the Accuracy of Finite Element Simulation

    NASA Astrophysics Data System (ADS)

    Yanaga, Daisaku; Kuwabara, Toshihiko; Uema, Naoyuki; Asano, Mineo

    2011-08-01

    Biaxial tensile tests of 6000 series aluminum alloy sheet with different density cube textures were carried out using cruciform specimens similar to that developed by one of the authors [Kuwabara, T. et al., J. Material Process. Technol., 80/81(1998), 517-523.]. The specimens are loaded under linear stress paths in a servo-controlled biaxial tensile testing machine. Plastic orthotropy remained coaxial with the principal stresses throughout every experiment. Successive contours of plastic work in stress space and the directions of plastic strain rates were precisely measured and compared with those calculated using selected yield functions. The Yld2000-2d yield functions with exponents of 12 and 6 [Barlat, F. et al., Int. J. Plasticity 19 (2003), 1297-1319] are capable of reproducing the general trends of the work contours and the directions of plastic strain rates observed for test materials with high and low cube textures, respectively. Hydraulic bulge tests were also conducted and the variation of thickness strain along the meridian direction of the bulged specimen was compared with that calculated using finite element analysis (FEA) based on the Yld2000-2d yield functions with exponents of 12 and 6. The differences of cube texture cause significant differences in the strain distributions of the bulged specimens, and the FEA results calculated using the Yld2000-2d yield functions show good agreement with the measurement results.

  8. Earing Prediction in Cup Drawing Based on Non-Associated Flow Rule

    SciTech Connect

    Yoon, J. W.; Dick, R. E.; Stoughton, T. B.

    2007-05-17

    An anisotropic constitutive model based on Non-Associated Flow Rule (Non-AFR), which incorporates plane stress yield functions (Hill's quadratic function and Yld2000-2d by Barlat et al.), was implemented to finite element codes (ABAQUS, LS-DYNA 3D) by using User Material options. By using Non-AFR, Yld2000-2d is capable of predicting more than four ears which is possible only with Yld2004 by Barlat et al. when used with an Associated Flow Rule. A short review of the Non-Associated Flow Rule was provided. Simulation of the cup drawing process for a rigid container sheet alloy using mini-die geometry was performed to show the cup height profile (earing profile) obtained from Non-AFR. The simulation results were compared with experimental earing profile data and it was shown that the simulations using Yld2000-2d and the Non-AFR led to the excellent prediction of the earing profile.

  9. EPR study of radicals produced by gamma-irradiation in marine mollusc (Venus sp.) fossils

    NASA Astrophysics Data System (ADS)

    Koseoglu, R.; Koksal, F.; Ciftci, E.

    2004-08-01

    In this study, gamma-irradiated marine mollusc (Venus sp.) fossils were investigated by electron paramagnetic resonance (EPR) at ambient temperature. Powder X-ray diffraction technique indicates that the Venus sp. fossils were made mainly of CaCO3. Before gamma-irradiation, the EPR lines of the powder of fossil samples showed the existence of Mn2+ (I = 5/2, 100% natural abundance) ions with g(av) = 2.0055 and A(av) = 9.4 mT gamma-Irradiation-induced additional defects in Venus sp. fossil were attributed to axial CO3- (gperpendicular to = 2.0171, g// = 2.0048), orthorhombic CO2- (g(x) = 2.0030, g(z) = 2.0018, g(y) = 1.9973, g(av) = 2.0007), freely rotating CO2- (g(iso) = 2.0007), isotropic SO2- (g = 2.0057), axial SO3- (g perpendicular to = 2.0036, g// = 2.0024) and isotropic SO3- (g = 2.0032) free radicals. The g-values of these free radicals were compared with the literature data belonging to similar defects.

  10. Analysis of earing behaviour in deep drawing of ASS 304 at elevated temperature

    NASA Astrophysics Data System (ADS)

    Gupta, Amit Kumar; Deole, Aditya; Kotkunde, Nitin; Singh, Swadesh Kumar; jella, Gangadhar

    2016-08-01

    Earing tendency in a deep drawn cup of circular blanks is one the most prominent characteristics observed due to anisotropy in a metal sheet. Such formation of uneven rim is mainly due to dissimilarity in yield stress as well as Lankford parameter (r- value) in different orientations. In this paper, an analytical function coupled with different yield functions viz., Hill 1948, Barlat 1989 and Barlat Yld 2000-2d has been used to provide an approximation of earing profile. In order to validate the results, material parameters for yield functions and hardening rule have been calibrated for ASS 304 at 250°C and deep drawing experiment is conducted to measure the earing profile. The predicted earing profiles based on analytical results have been validated using experimental earing profile. Based on this analysis, Barlat Yld 2000-2d has been observed to be a well suited yield model for deep drawing of ASS 304, which also confirms the reliability of analytical function for earing profile estimation.

  11. Silk damping at a redshift of a billion: new limit on small-scale adiabatic perturbations.

    PubMed

    Jeong, Donghui; Pradler, Josef; Chluba, Jens; Kamionkowski, Marc

    2014-08-01

    We study the dissipation of small-scale adiabatic perturbations at early times when the Universe is hotter than T≃0.5  keV. When the wavelength falls below the damping scale k(D)(-1), the acoustic modes diffuse and thermalize, causing entropy production. Before neutrino decoupling, k(D) is primarily set by the neutrino shear viscosity, and we study the effect of acoustic damping on the relic neutrino number, primordial nucleosynthesis, dark-matter freeze-out, and baryogenesis. This sets a new limit on the amplitude of primordial fluctuations of Δ(R)(2)<0.007 at 10(4)  Mpc(-1)≲k≲10(5)  Mpc(-1) and a model-dependent limit of Δ(R)(2)≲0.3 at k≲10(20-25)  Mpc(-1). PMID:25148313

  12. Wideband tunable graphene-based passively Q-switched Tm:YAP laser

    NASA Astrophysics Data System (ADS)

    Jin, Chenjie; Li, Diao; Bai, Yang; Ren, Zhaoyu; Bai, Jintao

    2015-04-01

    We investigate the characteristics of a graphene Q-switched Tm:YAP laser operating in a wavelength tunable regime. By using a volume Bragg grating (VBG) as the intra-cavity wavelength selection element, and graphene as the saturable absorber (SA), a tunable Q-switched Tm:YAP laser was realized with a continuous tunable wavelength range from 1965.2 to 2000.7 nm. Through careful alignment of the VBG and the graphene SA in coordination, stable pulsed laser operations were achieved at this wavelength range. A maximum output power of 920 mW was obtained at a wavelength of 1989.3 nm, corresponding to a pulse duration of 2.1 μs, a repetition rate of 91.6 kHz and a single pulse energy of 10.1 μJ.

  13. Modeling of hole-expansion of AA6022-T4 aluminum sheets with anisotropic non-quadratic yield functions

    NASA Astrophysics Data System (ADS)

    Korkolis, Yannis P.; Brownell, Benjamin; Coppieters, Sam; Tian, Haobin

    2016-08-01

    In the hole-expansion of anisotropic AA6022-T4 sheets, the strain around the hole is non-uniformly distributed due to the anisotropy of the material. This was examined by performing experiments with a flat-headed punch and using Digital Image Correlation (DIC). In the experiments, failure always initiated at a unique location, oriented at 45° to the Rolling Direction of the sheet. The use of DIC allowed the probing of the full-strain-field in real-time. Subsequently, the experiments were simulated in DYNAFORM using shell elements and the Yld2000-2D anisotropic non-quadratic yield function, properly calibrated for this material. In addition, the hardening curve of the material was inversely identified at large strains from the tail of the tensile test. The strain evolution is compared between the experiments and the model.

  14. Phases and Phase Transitions in the Two-Dimensional Ionic Hubbard Model

    NASA Astrophysics Data System (ADS)

    Bryant, Tyler; Singh, Rajiv R. P.

    2005-03-01

    We study the two-dimensional Ionic Hubbard model at half filling on a square lattice using linked cluster expansions [1]. The model consists of a Hubbard model with alternating site energies. In one dimension, it is known that there is an intermediate spontaneously dimerized phase separating the band insulator phase from the Mott insulator phase [2,3]. We calculate the ground state energy, local moment, spin-spin correlations, and dimer-dimer correlations to 12th order, starting from the band insulator phase. Using series extrapolation techniques the phase diagram of the model and the nature of the phase transitions is studied.[1] M.P. Gelfand, R.R.P. Singh, Adv. Phys. 49, 93 (2000)[2] C.D. Batista and A.A. Aligia, Phys. Rev. Lett. 92, 246405 (2004)[3] S.R. Manmana, V. Meden, R.M. Noack, K. Sch" onhammer, Phys. Rev. B 70, 155115 (2004)

  15. Anisotropic Properties of Stainless Steel—Clad Aluminum Sheet

    NASA Astrophysics Data System (ADS)

    Kim, Daeyong; Hwang, Bum Kyu; Lee, Young Seon; Kim, Ji Hoon; Kim, Min-Joong

    2010-06-01

    The production of a stainless steel—clad aluminum sheet by the cold rolling process is a more efficient and economical approach compared with the other types of processes utilized for the production of such sheets. Because both the stainless steel and aluminum sheets show the highly anisotropic behavior, it is necessary to investigate anisotropic properties of clad sheets for the design of process. In this paper, to investigate the anisotropic properties of stainless steel—clad aluminum sheet, two kinds of clad sheets were considered: STS439/AA3003 and STS439/AA1050/STS304 clad sheets. The uni-axial tension tests at 0, 45 and 90 degrees for the rolling direction were performed to obtained yield stresses and R values. The strain ratio at balanced biaxial tension state was measured from compression disk test. In order to describe the anisotropic behavior of the clad sheet, nonquadratic anisotropic yield function Yld2000-2d was utilized.

  16. Estimation of viscous dissipation in nanodroplet impact and spreading

    NASA Astrophysics Data System (ADS)

    Li, Xin-Hao; Zhang, Xiang-Xiong; Chen, Min

    2015-05-01

    The developments in nanocoating and nanospray technology have resulted in the increasing importance of the impact of micro-/nanoscale liquid droplets on solid surface. In this paper, the impact of a nanodroplet on a flat solid surface is examined using molecular dynamics simulations. The impact velocity ranges from 58 m/s to 1044 m/s, in accordance with the Weber number ranging from 0.62 to 200.02 and the Reynolds number ranging from 0.89 to 16.14. The obtained maximum spreading factors are compared with previous models in the literature. The predicted results from the previous models largely deviate from our simulation results, with mean relative errors up to 58.12%. The estimated viscous dissipation is refined to present a modified theoretical model, which reduces the mean relative error to 15.12% in predicting the maximum spreading factor for cases of nanodroplet impact.

  17. Influence of material modeling on earing prediction in cup drawing of AA3104 aluminum alloy sheet

    NASA Astrophysics Data System (ADS)

    Fukumasu, H.; Kuwabara, T.; Takizawa, H.

    2016-08-01

    In-plane biaxial tension and combined tension-compression tests are carried out for AA3104 aluminum alloy sheets. Linear stress paths are applied to cruciform specimens to measure the contours of plastic work in the stress space and the directions of plastic strain rates at each stress path. Coefficients α 1- α 8 and exponent M of the Yld2000-2d yield function are determined to minimize the mean square error of the analytical yield locus from a measured work contour. The values of the weighting coefficients in the evaluation of the error are varied to check the effect of a specific stress state on the earing behavior. The effects of the combinations of the weighting coefficients on the accuracy of earing prediction in the cup drawing process are discussed.

  18. A Comparison of Sheet Forming Methods for 5754-O Aluminum Alloy

    NASA Astrophysics Data System (ADS)

    Venkatesan, Senthilkumar; Pourboghrat, Farhang; Carsley, John E.

    2011-08-01

    The goal of this research was to verify, through experimentation and numerical modeling, that the sheet hydroforming process is a suitable alternative to conventional forming methods such as stamping for 5754-O aluminum alloy sheets. Numerical analyses included implementation of a temperature-dependent anisotropic yield function (YLD 2000-2d) and corresponding forming limit diagram (FLD) into the commercial FEM code LS-Dyna as a user material subroutine (UMAT). The temperature-dependent material model was used in a coupled thermo-mechanical finite element model to assess the accuracy of the UMAT's ability to predict both forming and failure behavior of AA5754-O under various forming conditions [4]. Numerical investigations proved that counteracting pressure used in sheet hydroforming drastically improves the draw depth, irons out wrinkles and delays the onset of failure when compared to conventional forming processes.

  19. Experimental validation of numerical model for asymmetric deep drawing of DP780 steel sheet using digital image correlation

    NASA Astrophysics Data System (ADS)

    Xue, X.; Liao, J.; Vincze, G.; Pereira, A. B.

    2016-08-01

    A validated numerical model for in-plane stress/strain prediction is essential in understanding the deformation behaviour of sheet metal forming process, in particular, asymmetric deep drawing of advanced high strength steel sheet. In this work, the Yld2000-2d anisotropic yield criterion integrated with the initial homogeneous anisotropic hardening model was employed to describe the complex material behaviours of DP780 steel as well as the adoption of Yoshida chord model for elastic modulus degradation. Digital image correlation technique was utilized to measure the in-plane strain and shape deviation of the developed P- channel. The validity of the numerical model was assessed by comparing the predicted strain distribution and twist springback with the measured results. It indicates that the developed numerical model based on the selected constitutive models is acceptable for the deformation analysis, although the predicted discrepancies still exist.

  20. Lithospheric flexure revealed by Pleistocene emerged marine terraces on the southern Hawaiian Islands

    SciTech Connect

    Jones, A.T. . Dept. of Oceanography)

    1992-01-01

    New field and geochronological data from emerged marine deposits in the southern Hawaiian Islands suggest uplift of the islands of Molokai, Lanai and Oahu. Corals from these islands were dated by ESR. The accumulated dose for aragonitic coral at ESR signal, g = 2.0007, was determined by the additive dose method. The environmental dose rate was estimated from the Uranium concentration in corals and by using an estimate of 2.5 rad/a for the cosmic ray dose. The ESR ages of the highest terraces on Molokai are 290 [+-] 31 ka (30 m), on Lanai 217 [+-] 19 ka (50 m) and on Oahu 468 [+-] 36 ka (28 m). The age and elevation of the marine terraces are interpreted to imply uplift during the Late Quaternary. Lithospheric flexure combined with horizontal plate motion is proposed as a mechanism to describe the pattern of uplifted terraces on these islands. Using two-dimensional elastic plate models, the height of maximum bulge is approximately 4% to 7% of the maximum deflection for a continuous or broken plate model. Drowned reefs off Hawaii indicate subsidence of 1 km since 340 ka. Thus, the magnitude of observed uplift (30--50 m) is consistent with theoretical maximum bulge heights derived from numerical results.

  1. A Voltage-Tunable Quantum Well Detector for Terahertz Radiation

    NASA Astrophysics Data System (ADS)

    Briceño, G.; Williams, J. B.; Sherwin, M. S.; Campman, K.; Gossard, A. C.

    1997-03-01

    Intersubband transitions in quantum wells have enabled the development of sensitive quantum well infrared photoconductors (QWIP) at wavelengths shorter than 20 microns. The potential of quantum well-based detectors at wavelengths of order 100 microns (3 Terahertz (THz)) has not been realized. We propose a novel antenna-coupled intersubband detector for THz frequencies. The detector is predicted to be sensitive only in a narrow band of frequencies which can be tuned by a factor of order two by applying dc voltages of order 1V. The speed of the detector is predicted to be limited by the intersubband relaxation rate (1 ns at T=10K)(J. N. Heyman et. al., Phys. Rev. Lett. 74), 2682 (1995). Prototype detectors have been constructed. The structure, dc transport characteristics and response of these devices to THz radiation will be discussed. Supported by the NSF Science and Technology Center for Quantized Electronic Structures DMR 91-20007, NSF DMR 9623874, AFOSR F-49620-94-1-0158, and the Ford Foundation (GB).

  2. Vulnerability to temperature-related mortality in Seoul, Korea

    NASA Astrophysics Data System (ADS)

    Son, Ji-Young; Lee, Jong-Tae; Anderson, G. Brooke; Bell, Michelle L.

    2011-07-01

    Studies indicate that the mortality effects of temperature may vary by population and region, although little is known about the vulnerability of subgroups to these risks in Korea. This study examined the relationship between temperature and cause-specific mortality for Seoul, Korea, for the period 2000-7, including whether some subgroups are particularly vulnerable with respect to sex, age, education and place of death. The authors applied time-series models allowing nonlinear relationships for heat- and cold-related mortality, and generated exposure-response curves. Both high and low ambient temperatures were associated with increased risk for daily mortality. Mortality risk was 10.2% (95% confidence interval 7.43, 13.0%) higher at the 90th percentile of daily mean temperatures (25 °C) compared to the 50th percentile (15 °C). Mortality risk was 12.2% (3.69, 21.3%) comparing the 10th (-1 °C) and 50th percentiles of temperature. Cardiovascular deaths showed a higher risk to cold, whereas respiratory deaths showed a higher risk to heat effect, although the differences were not statistically significant. Susceptible populations were identified such as females, the elderly, those with no education, and deaths occurring outside of a hospital for heat- and cold-related total mortality. Our findings provide supportive evidence of a temperature-mortality relationship in Korea and indicate that some subpopulations are particularly vulnerable.

  3. [Response of forest bird communities to forest gap in winter in southwestern China].

    PubMed

    Zhao, Dong-Dong; Wu, Ying-Huan; Lu, Zhou; Jiang, Guang-Wei; Zhou, Fang

    2013-06-01

    Although forest gap ecology is an important field of study, research remains limited. By plot setting and point counted observation, the response of birds to forest gaps in winter as well as bird distribution patterns in forest gaps and intact canopies were studied in a north tropical monsoon forest of southwestern China from November 2011 to February 2012 in the Fangcheng Golden Camellia National Nature Reserve, Guangxi. The regression equation of bird species diversity to habitat factor was Y1=0.611+0.002 X13+0.043 X2+0.002 X5-0.003 X8+0.006 X10+0.008 X1 and the regression equation of bird species dominance index to habitat factor was Y3=0.533+0.001 X13+0.019 X2+0.002 X3-0.017 X4+0.002 X1. There were 45 bird species (2 orders and 13 families) recorded in the forest gap, accounting for 84.9% of all birds (n=45), with an average of 9.6 species (range: 2-22). Thirty-nine bird species (5 orders and 14 families) were recorded in non-gap areas, accounting for 73.6% of all birds (n=39), with an average of 5.3 species (range: 1-12). These results suggested that gap size, arbor average height (10 m from gap margin), arbor quantity (10 m from gap margin), shrub quantity (10 m from gap margin), herbal average coverage (1 m from gap margin) and bare land ratio were the key forest gap factors that influenced bird diversities. On the whole, bird diversity in the forest gap was greater than in the intact canopy. Spatial distributions in the forest gaps were also observed in the bird community. Most birds foraged in the "middle" and "canopy" layers in the vertical stratification. In addition, "nearly from" and "close from" contained more birds in relation to horizontal stratification. Feeding niche differentiation was suggested as the main reason for these distribution patterns.

  4. Consent, commodification and benefit-sharing in genetic research.

    PubMed

    Dickenson, Donna

    2004-12-01

    The global value of the biotechnology industry is now estimated at 17 billion dollars, with over 1300 firms involved as of the year 2000.(2) It has been said that 'What we are witnessing is nothing less than a new kind of gold rush, and the territory is the body.' As in previous gold rushes, prospectors are flooding into unexplored and 'wide open' territories from all over the world, with possible ramifications for exploitation of Third World populations. These territories are also the Wild West of bioethics insofar as the law has very little hold on them: existing medical and patent law, such as the Moore and Chakrabarty cases, exert little control over powerful economic interests in both the United States and Europe. In the absence of a unified and consistent law on property in the body, the focus is increasingly on refining the consent approach to rights in human tissue and the human genome, with sensitive and promising developments from the Human Genetics Commission and the Department for International Development consultation on intellectual property. These developments incorporate the views of vulnerable genetic communities such as Native Americans or some Third World populations, and should be welcomed because they recognise the power imbalance between such groups and First World researchers or firms. However, they also highlight the continued tension about what is really wrong with commodifying human tissue or the human genome. Where's the injustice, and can it be solved by a more sophisticated consent procedure?

  5. Theory of electron g-tensor in bulk and quantum-well semiconductors

    NASA Astrophysics Data System (ADS)

    Lau, Wayne H.; Flatte', Michael E.

    2004-03-01

    We present quantitative calculations for the electron g-tensors in bulk and quantum-well semiconductors based on a generalized P.p envelope function theory solved in a fourteen-band restricted basis set. The dependences of g-tensor on structure, magnetic field, carrier density, temperature, and spin polarization have been explored and will be described. It is found that at temperatures of a few Kelvin and fields of a few Tesla, the g-tensors for bulk semiconductors develop quasi-steplike dependences on carrier density or magnetic field due to magnetic quantization, and this effect is even more pronounced in quantum-well semiconductors due to the additional electric quantization along the growth direction. The influence of quantum confinement on the electron g-tensors in QWs is studied by examining the dependence of electron g-tensors on well width. Excellent agreement between these calculated electron g-tensors and measurements [1-2] is found for GaAs/AlGaAs QWs. This work was supported by DARPA/ARO. [1] A. Malinowski and R. T. Harley, Phys. Rev. B 62, 2051 (2000);[2] Le Jeune et al., Semicond. Sci. Technol. 12, 380 (1997).

  6. Root border cell development is a temperature-insensitive and Al-sensitive process in barley.

    PubMed

    Pan, Jian-Wei; Ye, Dan; Wang, Li-Ling; Hua, Jing; Zhao, Gu-Feng; Pan, Wei-Huai; Han, Ning; Zhu, Mu-Yuan

    2004-06-01

    In vivo and in vitro experiments showed that border cell (BC) survival was dependent on root tip mucigel in barley (Hordeum vulgare L. cv. Hang 981). In aeroponic culture, BC development was an induced process in barley, whereas in hydroponic culture, it was a kinetic equilibrium process during which 300-400 BCs were released into water daily. The response of root elongation to temperatures (10-35 degrees C) was very sensitive but temperature changes had no great effect on barley BC development. At 35 degrees C, the root elongation ceased whereas BC production still continued, indicating that the two processes might be regulated independently under high temperature (35 degrees C) stress. Fifty microM Al could inhibit significantly BC development by inhibiting pectin methylesterase activity in the root cap of cv. 2000-2 (Al-sensitive) and cv. Humai 16 (Al-tolerant), but 20 microM Al could not block BC development in cv. Humai 16. BCs and their mucigel of barley had a limited role in the protection of Al-induced inhibition of root elongation, but played a significant role in the prevention of Al from diffusing into the meristems of the root tip and the root cap. Together, these results suggested that BC development was a temperature-insensitive but Al-sensitive process, and that BCs and their mucigel played an important role in the protection of root tip and root cap meristems from Al toxicity.

  7. Biaxial unloading and springback behavior of dual-phase DP590 steel using cruciform specimens

    NASA Astrophysics Data System (ADS)

    Korkolis, Yannis P.; Deng, Nengxiu; Kuwabara, Toshihiko

    2013-12-01

    The unloading behavior of a dual-phase steel (DP590) from a biaxial state of stress was probed using a newly-designed cruciform specimen. The specimen was designed to develop uniform and relatively large plastic strains (over 15% equivalent logarithmic plastic strain) in the gage section, before failure. Nine radial loading paths in the 1st quadrant of the plane stress space were probed. The experiments involved repeated loading and unloading up to failure. At every unloading, the initial response was found to agree with the linear, orthotropically elastic response of the undeformed material. This first linear response was followed by a second one, at a reduced slope. Beyond that, the recorded response was fully non-linear. The same sequence of events was observed during each reloading. The biaxial non-linear strain recovery components ɛxnl and ɛynl were measured to be on average approximately 11% of the elastic strains ɛxe and ɛye, respectively. This ratio was found to increase with plastic deformation. Subsequently, these biaxial experiments were used to calibrate the Yld2000-2D yield function.

  8. Morphology of cerium oxide surfaces in an oxidzing enviroment:a first-principles investigation

    NASA Astrophysics Data System (ADS)

    Fronzi, Marco; Soon, Aloysius; Stampfl, Catherine; Delley, Bernard; Traversa, Enrico

    2007-03-01

    A good understanding of the stability and chemistry of CeO2 surfaces is crucial for a better designing of solid oxide fuel cells. As the first step, we use DFT [1] to study the structural and electronic ground state properties of bulk CeO2. various surface termination of the low-index surface of CeO2 are then investigated, namely the stoichiometric, metal- and oxygen- rich terminations, and defected surfaces. Using the concept of ab initio atomistic thermodynamics&[tilde;2], we calculate the surface free energy phase diagram. This allows us to identify and predict stable, and potentally catalytically important, structures. There is an evidence to suggest an interesting morphological change in the surface structures with varying oxygen concentration. Reaction pathways for methane oxidation on low energy cerium oxide surfaces are being investigated and will be reported.[1] Formulated in the DMol^3 code; B. Delley, J. Chem. Phys. 92, 508 (1990);ibid. 113, 7756 (2000).[2] K. Reuter, C. Stampfl and M. Scheffler, in Handbook of Materials Modeling, Volume 1, Fundamental Models and Methods, Sidney Yip (Ed)(2005).

  9. Proper motion sky survey of 2.7 million stars with the Bordeaux automated CCD meridian circle .

    NASA Astrophysics Data System (ADS)

    Ducourant, C.; Le Campion, J. F.; Rapaport, M.; Camargo, J. I. B.; Soubiran, C.; Périe, J. P.; Teixeira, R.; Daigne, G.; Triaud, A.; Réquième, Y.; Fresneau, A.; Colin, J.

    The Bordeaux observatory astrometric group has made significant efforts to produce and exploit large data base surveys. This effort has been undertaken to extend and enrich the ICRS marterialized using Tycho2 catalogue. It includes the systematic re-observation of the Bordeaux Carte du Ciel zone with the Bordeaux automatic CCD meridian circle ; it also contains the digitization of ancient plate archive and the exploitation of large sky surveys such as the AC2000.2 catalogue, the USNO-A2.0 catalogue and the unpublished Yellow Sky (YS3) USNO catalogue. The whole effort led to the construction of three astrometric catalogues (M2000 [Rapaport et al. 2001], PM2000 [Ducourant et al. 2005] and CdC2000 [Rapaport et al. 2005]) of positions and proper motions (sigma 1-6 mas/yr) down to V 16.4 for 1/20 of the celestial sphere. The high precision achieved, allowed us to test the precision of the present day reference catalogues such as 2MASS and UCAC2 and to reveal systematic offsets in them. Due to its accurate proper motions, this catalogue offers a rich database for the cinematic analysis of Galactic stellar populations.

  10. Rational design, synthesis and 2D-QSAR study of novel vasorelaxant active benzofuran-pyridine hybrids.

    PubMed

    Srour, Aladdin M; Abd El-Karim, Somaia S; Saleh, Dalia O; El-Eraky, Wafaa I; Nofal, Zeinab M

    2016-05-15

    Reaction of 3-aryl-1-(benzofuran-2-yl)-2-propen-1-ones 3a-c with malononitrile in the presence of sufficient amount of sodium alkoxide in the corresponding alcohol proceeds in a regioselective manner to afford 2-alkoxy-4-aryl-6-(benzofuran-2-yl)-3-pyridinecarbonitriles 4-37, which also obtained by treating ylidenemalononitriles 6a-q with 2-acetylbenzofuran 1 in the presence of sufficient amount of sodium alkoxide in the corresponding alcohol. The new chemical entities showed significant vasodilation properties using isolated thoracic aortic rings of rats pre-contracted with norepinephrine hydrochloride standard technique. Compounds 11, 16, 21, 24 and 30 exhibited remarkable activity compared with amiodarone hydrochloride the reference standard used in the present study. CODESSA-Pro software was employing to obtain a statistically significant QSAR model describing the bioactivity of the newly synthesized analogs (N=31, n=5, R(2)=0.846, R(2)cvOO=0.765, R(2)cvMO=0.778, F=27.540. s(2)=0.002). PMID:27048942

  11. Seed dressing pesticides on springtails in two ecotoxicological laboratory tests.

    PubMed

    Alves, Paulo Roger L; Cardoso, Elke J B N; Martines, Alexandre M; Sousa, José Paulo; Pasini, Amarildo

    2014-07-01

    Terrestrial ecotoxicological tests are powerful tools for assessing the ecological risks that pesticides pose to soil invertebrates, but they are rarely used to evaluate seed dressing pesticides. This study investigated the effects of seed dressing pesticides on survival and reproduction of Folsomia candida (Collembola), using standardized ecotoxicological tests (after ISO guidelines with few adaptations for tropical conditions). Commercial formulations of five seed dressing pesticides were tested individually in Tropical Artificial Soil (TAS): the insecticides imidacloprid, fipronil, thiametoxam, and the fungicides captan and carboxin+thiram. Thiametoxam, captan, and carboxin+thiram were only lethal to F. candida at the highest concentration tested (1000mg of active ingredient kg(-1) of dry soil). Imidacloprid and fipronil were lethal at lower concentrations (100 and 10mg a.i. kg(-1) soil d.w, respectively), however, these concentrations were much higher than those predicted (PEC) for soil. Imidacloprid and fipronil were the most toxic pesticides in both tests, reducing significantly collembolan reproduction (EC20=0.02 and 0.12mga.i.kg(-1) soil d.w, respectively). Further studies under more realistic conditions are needed, since imidacloprid and fipronil reduced collembolan reproduction at concentrations below or close to their respective PECs.

  12. Rational design, synthesis and 2D-QSAR study of novel vasorelaxant active benzofuran-pyridine hybrids.

    PubMed

    Srour, Aladdin M; Abd El-Karim, Somaia S; Saleh, Dalia O; El-Eraky, Wafaa I; Nofal, Zeinab M

    2016-05-15

    Reaction of 3-aryl-1-(benzofuran-2-yl)-2-propen-1-ones 3a-c with malononitrile in the presence of sufficient amount of sodium alkoxide in the corresponding alcohol proceeds in a regioselective manner to afford 2-alkoxy-4-aryl-6-(benzofuran-2-yl)-3-pyridinecarbonitriles 4-37, which also obtained by treating ylidenemalononitriles 6a-q with 2-acetylbenzofuran 1 in the presence of sufficient amount of sodium alkoxide in the corresponding alcohol. The new chemical entities showed significant vasodilation properties using isolated thoracic aortic rings of rats pre-contracted with norepinephrine hydrochloride standard technique. Compounds 11, 16, 21, 24 and 30 exhibited remarkable activity compared with amiodarone hydrochloride the reference standard used in the present study. CODESSA-Pro software was employing to obtain a statistically significant QSAR model describing the bioactivity of the newly synthesized analogs (N=31, n=5, R(2)=0.846, R(2)cvOO=0.765, R(2)cvMO=0.778, F=27.540. s(2)=0.002).

  13. Seed dressing pesticides on springtails in two ecotoxicological laboratory tests.

    PubMed

    Alves, Paulo Roger L; Cardoso, Elke J B N; Martines, Alexandre M; Sousa, José Paulo; Pasini, Amarildo

    2014-07-01

    Terrestrial ecotoxicological tests are powerful tools for assessing the ecological risks that pesticides pose to soil invertebrates, but they are rarely used to evaluate seed dressing pesticides. This study investigated the effects of seed dressing pesticides on survival and reproduction of Folsomia candida (Collembola), using standardized ecotoxicological tests (after ISO guidelines with few adaptations for tropical conditions). Commercial formulations of five seed dressing pesticides were tested individually in Tropical Artificial Soil (TAS): the insecticides imidacloprid, fipronil, thiametoxam, and the fungicides captan and carboxin+thiram. Thiametoxam, captan, and carboxin+thiram were only lethal to F. candida at the highest concentration tested (1000mg of active ingredient kg(-1) of dry soil). Imidacloprid and fipronil were lethal at lower concentrations (100 and 10mg a.i. kg(-1) soil d.w, respectively), however, these concentrations were much higher than those predicted (PEC) for soil. Imidacloprid and fipronil were the most toxic pesticides in both tests, reducing significantly collembolan reproduction (EC20=0.02 and 0.12mga.i.kg(-1) soil d.w, respectively). Further studies under more realistic conditions are needed, since imidacloprid and fipronil reduced collembolan reproduction at concentrations below or close to their respective PECs. PMID:24785712

  14. Effect of the r-value change on the forming limit analysis for a ultra-low carbon steel sheet

    NASA Astrophysics Data System (ADS)

    Hakoyama, T.; Kuwabara, T.

    2016-08-01

    The effect of the r-value change on the accuracy of the forming limits predicted using the Marciniak-Kuczynski-type (M-K) forming limit analysis for a cold rolled interstitial- free (IF) steel sheet is investigated. Uniaxial tensile tests with a digital image correlation system are used to measure the r-value change. A tube subjected to tension-expansion loading under linear paths in the first quadrant of the stress space are performed to measure the multiaxial plastic deformation behavior and the forming limits of the test material. The observed differential hardening (DH) behavior is approximated by changing the material parameters of the Yld2000-2d yield function (Barlat et al, 2003) as functions of the reference plastic strain. The M-K analyses are performed using the r-value change and r-value constant DH model. It is concluded that the DH model considering the r-value change leads to the more accurate predicted forming limits.

  15. Evaluation of SCaMPR Satellite QPEs for Operational Hydrologic Prediction

    NASA Astrophysics Data System (ADS)

    LEE, H.; Zhang, Y.; Seo, D.; Kitzmiller, D. H.; Kuligowski, R. J.; Corby, R.

    2011-12-01

    National Weather Service (NWS) River Forecast Centers (RFCs) use rain gauge or radar-gauge multi-sensor quantitative precipitation estimates (QPEs) as the primary rainfall input to their operational hydrologic models. In areas with poor radar and rain gauge coverage, satellite-based QPEs are a potential alternative. In this work, we evaluated the utility of satellite-based QPEs produced via the Self-Calibrating Multivariate Precipitation Retrieval (SCaMPR) algorithm for operational hydrologic modeling for a set of basins in Texas and Louisiana for the period of 2000-7. First, we assessed the relative accuracy of two sets of SCaMPR QPEs versus gauge-only QPE, with operational multi-sensor QPEs as the reference. One set used only operational polar orbiting satellite microwave input as the predictors, the other included Tropical Rainfall Measuring Mission (TRMM) rain rates in the calibration process. We then performed hydrologic simulations using these QPEs and evaluated the simulations. Results indicated that a) SCaMPR QPEs showed better/worse skill than the gauge-only QPEs in resolving heavy precipitation at 1-h/24-h time intervals in terms of Critical Success Index (CSI); b) SCaMPR QPEs underperformed gauge-only QPEs in simulating flood events; and c) ingesting TRMM rainfall rates helped enhance the hydrologic utility of SCaMPR QPE, by mitigating the positive bias of SCaMPR QPEs, elevating the detection rates of heavy rainfall, and improving the simulation of flood discharge. Our findings suggest that the superior performance of gauge-only QPEs versus SCaMPR in hydrologic simulations is tied to its better accuracy at 24-h scale. The implication of the scale dependence in the relative performance of SCaMPR QPEs to their potential hydrologic utility is discussed.

  16. Pharmaceutical supply for disaster victims who need chronic disease management in region with aging population based on lessons learned from the Noto Peninsula Earthquake in 2007.

    PubMed

    Okumura, Junko; Nishita, Yoshihiro; Kimura, Kazuko

    2008-09-01

    The lessons from the Great Hanshin-Awaji Earthquake and Chuuetsu Earthquake showed us how difficult it is to keep chronic disease management for survivors of such large-scale earthquakes, particularly for elderly people. To solve the problem, an ordinance for enforcement on exceptional practices was issued for the Pharmaceutical Affairs Law Article 49 Clause 1. The law allows selling prescription medicines for patients with chronic diseases who have difficulties to continue their medications due to a large-scale disaster. To make it work, the patient should demonstrate that he or she continuously received the medication by presenting either Medication Notebook or prescription book recorded by the pharmacist. However, the Separation Rate of Prescription and Dispensing in Japan is still low; in particular, that in Ishikawa prefecture, where the Noto Peninsula Earthquake (M 6.9) occurred on March 25, 20007, is very low. It means that few victims hold a Medication Notebook. In consideration of this situation, we conducted a questionnaire survey of elderly victims of the Noto Peninsula Earthquake with a key-informant-interview during the period from July through August, 2007. This study revealed that: 1) Only 16% (18/110) of respondents kept a Medication Notebook; 2) 75% (82/110) had chronic diseases and received medication regularly; 3) Of 81 who had chronic diseases, 42% (34/91) were dispensed at the same pharmacy always, (The rest received from either clinic or changing pharmacy according to clinic location); and 4) Diseases that the respondents had were hypertension, cardiovascular diseases, diabetes, and so on. Based on these results, we discuss the establishment of a pharmaceutical supply system that can effectively distribute appropriate medicines to patients under difficult situations following a large-scale disaster in Japan.

  17. Effect of high progesterone concentrations during the early luteal phase on the length of the ovulatory cycle of goats.

    PubMed

    Menchaca, A; Rubianes, E

    2001-10-31

    The effect of exogenous progesterone exposure early in the oestrous cycle on the duration of the interovulatory interval was studied in dairy goats. A controlled intravaginal drug release (CIDR-G) device was inserted for 5 days starting at day 0 (D0 group, n=6) or day 3 (D3 group, n=5) postovulation. A third group was composed of untreated control goats (control group, n=7). Daily transrectal ultrasound was carried out during the interovulatory interval to assess the ovarian dynamics. Oestrous behaviour was checked twice a day and serum progesterone levels were assayed in daily jugular blood samples. Treated goats showed two different responses. In three D0 goats and one D3 goat, progesterone concentrations fell immediately after CIDR withdrawal and this was followed by oestrus and ovulation between days 8 and 11 (short cycles). In the other three D0 goats and in four D3 goats the treatment significantly reduced the interovulatory interval (18.3+/-0.3 and 18.5+/-0.3 days, respectively) (shortened cycles) compared with the control group (20.0+/-0.2 days; P<0.05), but the intervals with progesterone concentrations over 1 ng/ml were not different (15.7+/-0.3, 15.8+/-0.7 and 16.0+/-0.5 days for D0, D3 and control goats, respectively). In all D0 goats with a short cycle response, the ovulatory follicle arose from the first follicular wave but in the D3 goat with a short cycle it arose from the second follicular wave. These results showed that premature progesterone exposure early in the ovulatory cycle of the goat affected its length inducing short or shortened cycles. The effect of progesterone could either affect luteotropic support of the corpus luteum (CL) and/or stimulate a premature release of the luteolysin. PMID:11600275

  18. Temperature-Dependent, Linearly Interpolable, Tabulated Cross Section Library Based on ENDF/B-VI, Release 8.

    2005-02-21

    Version 00 As distributed, the original evaluated data include cross sections represented in the form of a combination of resonance parameters and/or tabulated energy dependent cross sections, nominally at 0 Kelvin temperature. For use in applications this library has been processed into the form of temperature dependent cross sections at eight neutron reactor like temperatures, between 0 and 2100 Kelvin, in steps of 300 Kelvin. It has also been processed to five astrophysics like temperatures,more » 1, 10, 100 eV, 1 and 10 keV. For reference purposes, 300 Kelvin is approximately 1/40 eV, so that 1 eV is approximately 12,000 Kelvin. At each temperature the cross sections are tabulated and linearly interpolable in energy. POINT2004 contains all of the evaluations in the ENDF/B-VI general purpose library, which contains evaluations for 328 materials (isotopes or naturally occurring elemental mixtures of isotopes). No special purpose ENDF/B-VI libraries, such as fission products, thermal scattering, or photon interaction data are included. The majority of these evaluations are complete, in the sense that they include all cross sections over the energy range 10-5 eV to at least 20 MeV. However, the following are only partial evaluations that either contain only single reactions and no total cross section (Mg24, K41, Ti46, Ti47, Ti48, Ti50 and Ni59), or do not include energy dependent cross sections above the resonance region (Ar40, Mo92, Mo98, Mo100, In115, Sn120, Sn122 and Sn124). The CCC-638/TART20002 code package is recommended for use with these data. Codes within TART can be used to display these data or to run calculations using these data.« less

  19. High voltage breakdown studies of sol-gel MgO-ZrO 2 insulation coatings under various pressures at 298 K and 77 K

    NASA Astrophysics Data System (ADS)

    Cakiroglu, O.; Arda, L.; Hascicek, Y. S.

    2005-06-01

    High voltage breakdown (HV bd) tests were performed to investigate electrical properties of high temperature MgO-ZrO 2 insulation coatings on long-length stainless steel (SS) tapes under various pressures at room temperature (298 K) and liquid nitrogen temperature (77 K) for applications of HTS/LTS coils and magnets. After solutions were prepared from Mg and Zr based precursors, solvent and chelating agent, the coating were fabricated on SS substrates using reel-to-reel sol-gel technique. Coating thicknesses for 4, 8, and 9 dippings were about 7, 12, and 13 μm, respectively, and thickness of epoxy-impregnated samples (stycast 2850 FT/24 LV) were measured to be 32 μm. The pressure from 0 GPa to 0.54 GPa was applied on to test couples, the stycast thicknesses between the layers were varied 32-20 μm. Thickness of the coatings and epoxy-impregnated using stycast were determined by using environmental scanning electron microscopy (ESEM). The resistance, capacitance, and HV bd of the samples were measured by using standard machines HP 439 a high resistance meter, 161 analog digital capacitance meter and model 200-02R high voltage power supply, respectively. Electric strength and dielectric constant were calculated at 298 and 77 K under various pressures. The high HV bd, and electric strength values of the samples were 2.84 kV and 45.91 kV/mm, respectively. ESEM observation revealed that arcing spots in the insulation coatings become larger and deeper for higher HV bd’s.

  20. Use of wood-based materials in beef bedded manure packs: 1. Effect on ammonia, total reduced sulfide, and greenhouse gas concentrations.

    PubMed

    Spiehs, Mindy J; Brown-Brandl, Tami M; Parker, David B; Miller, Daniel N; Jaderborg, Jeffrey P; DiCostanzo, Alfredo; Berry, Elaine D; Wells, James E

    2014-07-01

    The objectives of this study were to determine the effect of using corn stover or three different wood-based bedding materials (kiln-dried pine wood chips, dry cedar chips, or green cedar chips) on airborne concentrations of NH, total reduced sulfides (TRS), CO, CH, and NO above lab-scaled bedded manure packs. Four bedded packs of each bedding material were maintained for two 42-d periods. Airborne NH, TRS, CO, CH, and NO were measured weekly. Bedded packs containing dry or green cedar had lower concentrations of NH (350.8 and 357.3 mg m, respectively; < 0.05) than bedded packs containing pine chips or corn stover (466.0 and 516.7 mg m, respectively). Airborne CO was also lower from bedded packs containing dry and green cedar (1343.7 and 1232.3 mg m, respectively; < 0.001) compared with bedded packs containing pine chips or corn stover (2000.2 and 1659.8 mg m, respectively). Air samples from bedded packs containing green cedar chips had a higher ( < 0.01) concentration of CH than bedded packs containing dry cedar chips, corn stover, or pine chips at Day 35 and 42. Initially, TRS concentration was similar among all bedding materials; at 28 to 42 d, TRS was higher ( < 0.001) from bedded packs containing the cedar products. Airborne NO was similar ( = 0.51) for all bedding materials. Pine chips and cedar products can be adequate substitutes for corn stover in deep-bedded barns, but cedar bedding may need to be removed more frequently. PMID:25603067

  1. Protein intake and lumbar bone density: the Multi-Ethnic Study of Atherosclerosis (MESA).

    PubMed

    Hu, Tian; Rianon, Nahid J; Nettleton, Jennifer A; Hyder, Joseph A; He, Jiang; Steffen, Lyn M; Jacobs, David R; Criqui, Michael H; Bazzano, Lydia A

    2014-10-28

    Dietary protein has been shown to increase urinary Ca excretion in randomised controlled trials, and diets high in protein may have detrimental effects on bone health; however, studies examining the relationship between dietary protein and bone health have conflicting results. In the present study, we examined the relationship between dietary protein (total, animal and vegetable protein) and lumbar spine trabecular volumetric bone mineral density (vBMD) among participants enrolled in the Multi-Ethnic Study of Atherosclerosis (n 1658). Protein intake was assessed using a FFQ obtained at baseline examination (2000-2). Lumbar spine vBMD was measured using quantitative computed tomography (2002-5), on average 3 years later. Multivariable linear and robust regression techniques were used to examine the associations between dietary protein and vBMD. Sex and race/ethnicity jointly modified the association of dietary protein with vBMD (P for interaction = 0·03). Among white women, higher vegetable protein intake was associated with higher vBMD (P for trend = 0·03), after adjustment for age, BMI, physical activity, alcohol consumption, current smoking, educational level, hormone therapy use, menopause and additional dietary factors. There were no consistently significant associations for total and animal protein intakes among white women or other sex and racial/ethnic groups. In conclusion, data from the present large, multi-ethnic, population-based study suggest that a higher level of protein intake, when substituted for fat, is not associated with poor bone health. Differences in the relationship between protein source and race/ethnicity of study populations may in part explain the inconsistent findings reported previously.

  2. Magnitude and Uncertainty of Carbon Pools and Fluxes in the US Forests

    NASA Astrophysics Data System (ADS)

    Harris, N.; Saatchi, S. S.; Fore, A.; Yu, Y.; Woodall, C. W.; Ganguly, S.; Nemani, R. R.; Hagen, S.; Birdsey, R.; Brown, S.; Salas, W.; Johnson, K. D.

    2015-12-01

    Sassan Saatchi1,2, Stephan Hagen3, Christopher Woodall4 , Sangram Ganguly,5 Nancy Harris6, Sandra Brown7, Timothy Pearson7, Alexander Fore1, Yifan Yu1, Rama Nemani5, Gong Zhang5, William Salas4, Roger Cooke81 NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA2 Institute of Environment and Sustainability, University of California, Los Angeles, CA, 90095, USA3 Applied Geosolutions, 55 Main Street Suit 125, Newmarket, NH 03857, USA4 USDA Forest Service, Northern Research Station, Saint Paul, MN 55108, USA5 NASA Ames Research Center, Moffett Field, CA 94035, USA6 Forests Program, World Resources Institute, Washington, DC, 20002, USA7 Winrock International, Ecosystem Services Unit, Arlington, VA 22202, USA8 Risk Analysis Resources for the Future, Washington DC 20036-1400Assessment of the carbon sinks and sources associated with greenhouse gas (GHG) fluxes across the US forestlands is a priority of the national climate mitigation policy. However, estimates of fluxes from the land sector are less precise compared to other sectors because of the large sources of uncertainty in quantifying the carbon pools, emissions, and removals associated with anthropogenic (land use) and natural changes in the US forestlands. As part of the NASA's Carbon Monitoring System, we developed a methodology based on a combination of ground inventory and space observations to develop spatially refined carbon pools and fluxes including the gross emissions and sequestration of carbon at each 1-ha land unit across the forestlands in the continental United States (CONUS) for the period of 2006-2010. Here, we provide the magnitude and uncertainty of multiple pools and fluxes of the US forestlands and outline the observational requirements to reduce the uncertainties for developing national climate mitigation policies based on the carbon sequestration capacity of the US forest lands. Keywords: forests, carbon pools, greenhouse gas, land use, attribution

  3. THE THIRD US NAVAL OBSERVATORY CCD ASTROGRAPH CATALOG (UCAC3)

    SciTech Connect

    Zacharias, N.; Finch, C.; Wycoff, G.; Zacharias, M. I.; Corbin, T.; Dutta, S.; Gaume, R.; Gauss, S.; Hall, D.; Hartkopf, W.; Hsu, D.; Holdenried, E.; Makarov, V.; Mason, B.; Girard, T.; Hambly, N.; Castillo, D.; DiVittorio, M.; Germain, M.; Martines, M.

    2010-06-15

    The third US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC3, was released at the IAU General Assembly on 2009 August 10. It is the first all-sky release in this series and contains just over 100 million objects, about 95 million of them with proper motions, covering about R = 8-16 mag. Current epoch positions are obtained from the observations with the 20 cm aperture USNO Astrograph's 'red lens', equipped with a 4k x 4k CCD. Proper motions are derived by combining these observations with over 140 ground- and space-based catalogs, including Hipparcos/Tycho and the AC2000.2, as well as unpublished measures of over 5000 plates from other astrographs. For most of the faint stars in the southern hemisphere, the Yale/San Juan first epoch plates from the Southern Proper Motion (SPM) program (YSJ1) form the basis for proper motions. These data are supplemented by all-sky Schmidt plate survey astrometry and photometry obtained from the SuperCOSMOS project, as well as 2MASS near-IR photometry. Major differences of UCAC3 data as compared with UCAC2 include a completely new raw data reduction with improved control over systematic errors in positions, significantly improved photometry, slightly deeper limiting magnitude, coverage of the north pole region, greater completeness by inclusion of double stars, and weak detections. This of course leads to a catalog which is not as 'clean' as UCAC2 and problem areas are outlined for the user in this paper. The positional accuracy of stars in UCAC3 is about 15-100 mas per coordinate, depending on magnitude, while the errors in proper motions range from 1 to 10 mas yr{sup -1} depending on magnitude and observing history, with a significant improvement over UCAC2 achieved due to the re-reduced SPM data and inclusion of more astrograph plate data unavailable at the time of UCAC2.

  4. Vaporization thermodynamic studies by high-temperature mass spectrometry on some three-phase regions over the MnO-TeO2 binary line in the Mn-Te-O ternary system.

    PubMed

    Narasimhan, T S Lakshmi; Sai Baba, M; Viswanathan, R

    2006-12-28

    Knudsen effusion mass spectrometric measurements have been performed in the temperature range of 850-950 K over four three-phase mixtures, each phase mixture having at least one phase lying on the MnO-TeO2 binary line of the Mn-Te-O phase diagram, and the rest of the phases lying above this binary line. The three-phase mixtures investigated are Mn3O4 + MnO + Mn6Te5O16; Mn3O4 + Mn6Te5O16 + MnTeO3; Mn3O4 + Mn3TeO6 + MnTeO3; and Mn3TeO6 + MnTeO3 + Mn2Te3O8. The vapor pressures of the gaseous species TeO2, TeO, and Te2 over these three-phase mixtures were measured, and various heterogeneous solid-gas reactions were evaluated along with the homogeneous gas-phase reaction TeO2(g) + 0.5Te2(g) = 2 TeO(g). The enthalpy and Gibbs free energy of formation of the four ternary Mn-Te-O phases were deduced at T = 900 K. These values (in kJ.mol-1), along with the estimated uncertainties in them are Delta(f)H(o)m = 4150 +/- 19, 752 +/- 11, 1710 +/- 11, 1924 +/- 40, and Delta(f)G(o)m= 2835 +/- 28, 511 +/- 11, 1254 +/- 19, 1238 +/- 38, for Mn6Te5O16, MnTeO3, Mn3TeO6, and Mn2Te3O8, respectively. A thermochemical assessment was made to examine the conditions under which the ternary Mn-Te-O phases could be formed on a stainless steel clad of mixed-oxide-fueled (MO2; M = U + Pu) fast breeder nuclear reactors. The phase Mn3TeO6 could be formed when the fuel is even slightly hyperstoichiometric (O/M = 2.0002) and the phase Mn6Te5O16 could also be formed when O/M = 2.0004. The threshold tellurium potential for the formation of Mn3TeO6 is higher than that for MnTe0.80 and CrTe1.10, but is comparable to that for MoTe1.10, and even lower than that for FeTe0.81 or NiTe0.63.

  5. Relation between progesterone concentrations during the early luteal phase and follicular dynamics in goats.

    PubMed

    Menchaca, Alejo; Rubianes, Edgardo

    2002-03-15

    We studied the relationship between progesterone (P4) concentrations early in the estrus cycle and follicular dynamics in dairy goats. We used seven untreated goats (control group) and six progesterone treated goats (P group) with a controlled internal drug release device from Days 0 to 5 (Day 0: day of ovulation). We performed daily ultrasonograph during the interovulatory interval to determine ovarian change and took daily blood samples to determine serum estradiol 17beta (E2) and P4 concentrations by RIA. We divided the control goats into 3- (n = 4) and 4-wave goats (n = 3), according to the number of follicular waves recorded during the ovulatory cycle. Mean progesterone concentrations between Days I and 5 were higher and mean estradiol concentrations between Days 3 and 5 were lower in 4-wave goats (P4: 3.8+/-0.2 ng/ml; E2: 1.6+/-0.2 pg/ml) than in 3-wave goats (P4: 2.0+/-0.5 ng/ml, P < 0.05; E2: 4.4+/-0.9 pg/ml, P < 0.05). Wave 2 emerged earlier in 4-wave (Day 4.2+/-0.3) than in 3-wave goats (Day 7.3+/-0.3, P < 0.05). Three out of six of the progesterone-treated goats had short cycles (mean 8.0+/-0.0 days) and ovulated from Wave 1. The other three goats had shorter cycles (mean 18.3+/-0.3 days) than the control group (20.0+/-0.2 days; P < 0.05), although they were within the normal range of control cycles (shortened cycles). In the three treated goats with shortened cycles (two with four waves, one with three waves), mean progesterone concentrations between Days I and 5 were higher (4.7+/-0.6 ng/ml) than in the 3-wave control goats. In these goats, Wave 2 emerged at Day 4.3+/-0.3, similar to the time observed in 4-wave goats but earlier (P < or = 0.05) than in 3-wave control goats. Overall results confirm a relationship between the progesterone levels and the follicular wave turnover during the early luteal phase in the goat. Higher progesterone concentrations may accelerate follicular turnover probably by an early decline of the negative feedback action of

  6. THE FOURTH US NAVAL OBSERVATORY CCD ASTROGRAPH CATALOG (UCAC4)

    SciTech Connect

    Zacharias, N.; Finch, C. T.; Bartlett, J. L.; Girard, T. M.; Henden, A.; Monet, D. G.; Zacharias, M. I.

    2013-02-01

    The fourth United States Naval Observatory (USNO) CCD Astrograph Catalog, UCAC4, was released in 2012 August (double-sided DVD and CDS data center Vizier catalog I/322). It is the final release in this series and contains over 113 million objects; over 105 million of them with proper motions (PMs). UCAC4 is an updated version of UCAC3 with about the same number of stars also covering all-sky. Bugs were fixed, Schmidt plate survey data were avoided, and precise five-band photometry was added for about half the stars. Astrograph observations have been supplemented for bright stars by FK6, Hipparcos, and Tycho-2 data to compile a UCAC4 star catalog complete from the brightest stars to about magnitude R = 16. Epoch 1998-2004 positions are obtained from observations with the 20 cm aperture USNO Astrograph's 'red lens', equipped with a 4k by 4k CCD. Mean positions and PMs are derived by combining these observations with over 140 ground- and space-based catalogs, including Hipparcos/Tycho and the AC2000.2, as well as unpublished measures of over 5000 plates from other astrographs. For most of the faint stars in the southern hemisphere, the first epoch plates from the Southern Proper Motion program form the basis for PMs, while the Northern Proper Motion first epoch plates serve the same purpose for the rest of the sky. These data are supplemented by 2MASS near-IR photometry for about 110 million stars and five-band (B, V, g, r, i) APASS data for over 51 million stars. Thus the published UCAC4, as were UCAC3 and UCAC2, is a compiled catalog with the UCAC observational program being a major component. The positional accuracy of stars in UCAC4 at mean epoch is about 15-100 mas per coordinate, depending on magnitude, while the formal errors in PMs range from about 1 to 10 mas yr{sup -1} depending on magnitude and observing history. Systematic errors in PMs are estimated to be about 1-4 mas yr{sup -1}.

  7. Material characterization and finite element simulations of aluminum alloy sheets during non-isothermal forming process

    NASA Astrophysics Data System (ADS)

    Zhang, Nan

    evolving yield stresses and Lankford coefficients (r-value) at various temperatures with specimens in 0°, 45° and 90° to the rolling direction. Besides, thermally-activated deformation mechanisms, dynamic strain ageing and dislocation climb, are identified to control the material deformation at the ambient-to-warm temperature range. For biaxial loading condition, the hydraulic bulge test has been performed and the evaluated effective stress-strain curve is found to be identical to that from uniaxial tests. A new piece-wised temperature-dependent phenomenological constitutive model has been developed to describe and predict the evolving stress-strain curves within the experimental condition. The power-law model is chosen for temperature ranges from 25° to 100° where negative strain rate sensitivity is observed. At elevated temperatures, a new model has been developed and expressed as the product of two power-law models. This proposed model has been proved to be capable of capturing both strain hardening and thermal softening behaviors of material, even for perfect plasticity with large strain conditions. To account for the directionality of the material properties in sheet metal, Yld2000-2d, which has been proved to be one of the most accurate and efficient yield functions for aluminum alloys in numerical analysis, is selected as the anisotropic yield function in this work. Eight parameters in Yld2000-2d have been determined and calibrated using the experimental results from uniaxial and biaxial testing of AA5182-O. Moreover, those eight parameters are fitted in to the temperature-dependent functions, hence the evolution of yield surface is predictable in response to the temperature changes. It is noticed that the material carries more anisotropy at ambient temperatures and tends to approach the isotropic behavior when the temperature elevated to 300°. The strain-based and stress-based forming limit diagrams (FLD) of AA5182-O at various temperatures have been

  8. Spurrite, tilleyite and associated minerals in the exoskarn zone from Cornet Hill (Metaliferi Massif, Apuseni Mountains, Romania)

    NASA Astrophysics Data System (ADS)

    Marincea, S.; Dumitras, D. G.; Calin, N.; Anason, A. M.; Fransolet, A. M.; Hatert, F.

    2012-04-01

    The high-temperature skarn occurrence from Cornet Hill (Apuseni Mountains, Romania) is known as one of the rare occurrences of spurrite and tilleyite worldwide. Both minerals concentrate in the outer skarn zone, corresponding to the exoskarn, at the contact of a monzodiorite - quartz monzonite body, of Upper Cretaceous age, with Tithonic - Kimmeridgian reef limestones. The skarn from Cornet Hill is clearly zoned. The zoning is, from the outer to the inner part of the metasomatic area: calcite (marble) / tilleyite / spurrite / wollastonite + gehlenite + vesuvianite / wollastonite - grossular / quartz monzonite. The mineral assemblage identified so far includes gehlenite, spurrite, tilleyite, diopside, grossular, titanian andradite, magnetite, monticellite, wollastonite, perovskite, vesuvianite, afwillite, fukalite, ellestadite-(OH), calcite, aragonite, pyrrhotite, scawtite, thaumasite, clinochlore, chrysotile, hibschite, xonotlite, thomsonite, gismondine, plombièrite, tobermorite, riversideite, portlandite, allophane. Spurrite composes 90-95 of the rock volume of the inner exoskarn zone, where it forms practically monomineralic masses of grayish blue to pale gray color associated with perovskite, grossular, scarce tilleyite and wollastonite, and secondary afwillite, ellestadite-OH, fukalite and thaumasite. Some of the larger patches of spurrite are, however, cross cut by microveins containing scawtite, plombièrite, tobermorite, calcite and secondary aragonite. The mean unit-cell parameters, obtained as average of seven sets of data refined on the basis of X-ray powder patterns, are a 10.496(15), b 6.719(8), c 14.182(18) Å and ? 101.38(4)°. The average crystal-chemical formula, established on the basis of 23 point analyses is: (Ca5.012Mg0.002Fe2+0.002Na0.011K0.001)(Si1.990Ti0.002)O8(CO3)0.995. Tilleyite represents the main constituent of the outer exoskarn zone. It occurs as monomineralic grey-bluish "orbicules" up to 5 cm2 in size, generally rimmed by scawtite