Sample records for east mesa site

  1. Field tests of 2- and 40-tube condensers at the East Mesa Geothermal Test Site

    SciTech Connect

    Murphy, R.W.; Domingo, N.

    1982-05-01

    Two water-cooled isobutane condensers, one with 2 tubes and one with 40 tubes, were subjected to field tests at the East Mesa Geothermal Test Site to assess relative heat transfer performance in both surface evaporator and direct-contact evaporator modes. The five groups of tests established that field performance was below earlier laboratory-determined levels and that direct-contact evaporator mode performance was poorer than that for the surface evaporator mode. In all test situations, fluted condenser tubes performed better than smooth condenser tubes. Cooling water quality had no significant effect on performance, but brine preflash in the direct-contact mode did promote some relative performance improvement. Important implications of these results for binary geothermal power plants are that (1) working-fluid-side impurities can significantly degrade heat transfer performance of the power plant condensers and (2) provisions for minimizing such impurities may be required.

  2. MESA 2007MESA 2007MESA 2007MESA 2007 Panel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land

    E-print Network

    Paris-Sud XI, Université de

    MESA 2007MESA 2007MESA 2007MESA 2007 Panel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land and Loyalty in the Middle EastPanel :Before Nationalism: Land and Loyalty in the Middle East The tribal territory

  3. Tunnel detection using the radio imaging method at the Otay Mesa site

    Microsoft Academic Search

    Kenneth D. Mahrer; William A. Mondt

    1994-01-01

    We demonstrated that radio imaging method (RIM) surface-to- surface, borehole-to-surface, and borehole-to-borehole sensing technologies at the Otay Mesa test site east of San Diego, CA could detect and delineate a horizontal 4 X 6-foot (cross- section) tunnel buried at a depth of approximately 45 feet. Utilizing monochromatic, continuous wave electromagnetic signals from a magnetic dipole source operating in the range

  4. Pollen analysis of Anasazi sites at Black Mesa, Arizona

    E-print Network

    Murry, Robert Earl

    1983-01-01

    Sampling Laboratory Methodology III. SITE DESCRIPTIONS AND DISCUSSION OF DATA Basketmaker Phases Pueblo Phases . Sites Lacking Pollen Data Coprolite Samples . Page iii 1V vi Yii 1 12 12 13 17 20 22 25 26 32 51 75 79 IV. POLLEN... (beginning ca. 600 B. C. on Black Mesa) to Pueblo II-III (ending ca. A. D. 1150). The cultural phases assigned these sites follow Gumerman et al. (1972), Powell (1980), Powell et al. (1980) and Andrews et al. (1982). These are the: Basketmaker II, Lolomai...

  5. Response of east Mesa and Raft River reservoirs to injection-backflow testing

    SciTech Connect

    Russell, B.F.; Hull, L.C.; Downs, W.F.

    1983-12-01

    Analysis of tracer recovery curves from injection-backflow testing at two geothermal reservoirs reveals large differences in responsebetween the two. The east Mesa reservoir is in a layered sandstone matrix, and tracer behavior can be adequately described by porous media theory. As the volume of water injected into the reservoir increases and, consequently, the depth of penetration into the formation, the ratio of dispersive flux to advective flux decreases, indicating the increasing importance of advective transport. This effect can be seen in normalized tracer recovery curves that become more symmetrical with greater injection volume. At the Raft River site, the reservoir is dominated by a single major fracture zone. Injecting larger volumes of water into the fracture does not change the shape of the normalized tracer recovery curves. This indicates that the dispersion coefficient increases proportionally to the distance traveled by the injection front. Differences in the shape of tracer recovery curves are related to fundamental differences in reservoir characteristics. Long tails on the tracer recovery curves at Raft River suggest a dual porosity reservoir with a secondary fracture network connected to the major fracture. Such findings may considerably affect calculations of secondary heat recovery using injection wells.

  6. Deep Resistivity Structure of Rainier Mesa-Shoshone Mountain, Nevada Test Site, Nevada

    SciTech Connect

    Theodore H. Asch; Brian D. Rodriguez; Jay A. Sampson; Jackie M. Williams; Maryla Deszcz-Pan

    2006-12-12

    The U. S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing groundwater contamination resulting from historical underground nuclear testing through the Environmental Management (EM) program and, in particular, the Underground Test Area (UGTA) project. During 2005, the U.S. Geological Survey (USGS), funded by the DOE and NNSA-NSO, collected and processed data from twenty-six Magnetotelluric (MT) and Audio-Magnetotelluric (AMT) sites at the Nevada Test Site. Data stations were located in and near Rainier Mesa and Shoshone Mountain to assist in characterizing the pre-Tertiary geology in those areas. These new stations extend to the west the hydrogeologic study that was conducted in Yucca Flat in 2003. This work has helped to refine the character, thickness, and lateral extent of pre Tertiary confining units. In particular, a major goal has been to define the upper clastic confining unit (UCCU – late Devonian to Mississippian-age siliciclastic rocks assigned to the Eleana Formation and Chainman Shale(Bechtel Nevada, 2006)) in the Yucca Flat area and west towards Shoshone Mountain in the south, east of Buckboard Mesa, and onto Rainier Mesa in the north. The Nevada Test Site magnetotelluric data interpretation presented in this report includes the results of detailed two-dimensional (2 D) resistivity modeling for each profile (including alternative interpretations) and gross inferences on the three dimensional (3 D) character of the geology within the region. The character, thickness, and lateral extent of the Chainman Shale and Eleana Formation that comprise the Upper Clastic Confining Unit (UCCU) are generally characterized in the upper 5 km. The interpretation is not well determined where conductive TCU overlies conductive Chainman Shale, where resistive Eleana Formation overlies resistive LCA units, or where resistive VTA rock overlies units of the Eleana Formation. The nature of the volcanic units in the west has been refined as are large and small fault structures such as the CP Thrust Fault, the Carpetbag Fault, and the Yucca Fault that cross Yucca Flat. The subsurface electrical resistivity distribution and inferred geologic structures determined by this investigation should help constrain the hydrostratigraphic framework model that is under development for the Rainier Mesa/Shoshone Mountain Corrective Action Unit and areas to the west and in understanding the effects on ground-water flow in the area.

  7. An Isotopic Investigation of Groundwater Recharge in the East Mesa Area of the Salton Sea Basin

    NASA Astrophysics Data System (ADS)

    Moran, J. E.; Tompson, A. F.; Demir, Z.

    2008-12-01

    The Salton Sea Basin, a closed topographic basin located in arid southeastern California and a portion of Baja California, Mexico, is home to some of the most productive agricultural lands in the United States. In the Imperial Valley, in the southern portion of the basin, groundwater use is limited owing to the wide availability of imported water, low urban demand, and water production and quality limitations. Intense interest in developing new water supplies and, separately, restoring the Salton Sea has led to renewed interest in the availability of groundwater in the Imperial Valley, especially the East Mesa area, where decades of leakage from unlined canals has likely impacted groundwater. This study uses isotopic tracers of the water molecule to examine the source of water and groundwater residence time in the East Mesa area between the All American and Coachella canals and the Salton Sea. Groundwater samples were collected from 12 wells and from the All American Canal at Drop 1 for stable isotopes of the water molecule and for tritium-helium groundwater age. Remote well locations, unfavorable well construction, and a dearth of monitoring wells with small open intervals, however, placed limitations on both sample integrity and on spatial coverage of the sampling area. The aridity of the Salton Sea area, and the long history of irrigation with Colorado River water, has marked the groundwater with an evaporated Colorado River water stable isotope signature. High tritium waters (captured in the extensive surface storage system of the Colorado River during peak fallout) that have infiltrated in the Salton Sea area make another good tracer of groundwater transport. Recently recharged groundwater, with tritium-helium apparent ages of less than 2 years, has a chemical and isotopic signature that closely matches water from the canal, and is found in wells directly adjacent to the All American canal. Mean apparent ages of 10 to 40 years were observed in wells at distances of 1 km to more than 7 km from the canal. These wells have isotopic signatures of less evaporated Colorado River water, indicating recharge took place after emplacement of at least some of the dams but during a time of high tritium fallout from atmospheric weapons testing. Overall, the results suggest that there has been significant leakage from the unlined canals, and that water penetrates to much greater depth in the East Mesa study area when compared to the Central Imperial Valley where irrigated agriculture dominates the landscape. These are consistent with other interpretations based upon purely geologic and water budget considerations.

  8. Hydraulic-fracture stimulation treatments at East Mesa, Well 58-30. Geothermal-reservoir well-stimulation program

    SciTech Connect

    Not Available

    1981-02-01

    East Mesa Well 58-30 was selected for two stimulation treatments: a conventional hydraulic fracture in a deep, low permeability interval, and a dendritic fracture in a shallow, high permeability interval of completion. The well selection, pre-stimulation evaluation, fracture treatment design, and post-stimulation evaluation are presented.

  9. Nature and extent of lava-flow aquifers beneath Pahute Mesa, Nevada Test Site

    SciTech Connect

    Prothro, L.B.; Drellack, S.L. Jr.

    1997-09-01

    Work is currently underway within the Underground Test Area subproject of the US Department of Energy/Nevada Operations Office Environmental Restoration Program to develop corrective action plans in support of the overall corrective action strategy for the Nevada Test Site as established in the Federal Facility Agreement and Consent Order (FFACO, 1996). A closure plan is currently being developed for Pahute Mesa, which has been identified in the FFACO as consisting of the Western and Central Pahute Mesa Corrective Action Units. Part of this effort requires that hydrogeologic data be compiled for inclusion in a regional model that will be used to predict a contaminant boundary for these Corrective Action Units. Hydrogeologic maps have been prepared for use in the model to define the nature and extent of aquifers and confining units that might influence the flow of contaminated groundwater from underground nuclear tests conducted at Pahute Mesa. Much of the groundwater flow beneath Pahute Mesa occurs within lava-flow aquifers. An understanding of the distribution and hydraulic character of these important hydrogeologic units is necessary to accurately model groundwater flow beneath Pahute Mesa. This report summarizes the results of a study by Bechtel Nevada geologists to better define the hydrogeology of lava-flow aquifers at Pahute Mesa. The purpose of this study was twofold: (1) aid in the development of the hydrostratigraphic framework for Pahute Mesa, and (2) provide information on the distribution and hydraulic character of lava-flow aquifers beneath Pahute Mesa for more accurate computer modeling of the Western and Central Pahute Mesa Corrective Action Units.

  10. Internal Technical Report, Hydrothermal Injection Program - East Mesa 1983-84 Test Data

    SciTech Connect

    Freiburger, R.M.

    1984-09-01

    This report presents a test data index and a data plots for a series of 12 drawdown and tracer injection-withdrawal tests in porous-media aquifers at the East Mesa Geothermal Field located in the Imperial Valley near El Centro, California. Test and instrumentation summaries are also provided. The first 10 of these tests were completed during July and August 1983. The remaining 2 tests were completed in February 1984, after a 6-month quiescent period, in which tracers were left in the reservoir. The test wells used were 56-30 and 56-19, with 38-30 supplying water for the injection phase and 52-29 used as a disposal well during the backflowing of the test wells. Six other wells in the surrounding area were measured periodically for possible hydrologic effects during testing. It is not the intent of this report to supply analyzed data, but to list the uninterpreted computer stored data available for analysis. The data have been examined only to the extent to ensure that they are reasonable and internally consistent. This data is stored on permanent files at the Idaho National Engineering Laboratory (INEL) Cyber Computer Complex. The main processors for this complex are located at the Computer Science Center (CSC) in Idaho Falls, Idaho. The Hydrothermal Injection Test program, funded by the Department of Energy, was a joint effort between EG and G Idaho, Inc., the University of Utah Research Institute (UURI) and Republic Geothermal, Inc. (RGI) of Santa Fe Springs, California.

  11. COMBINED LEPA AND MESA IRRIGATION ON A SITE SPECIFIC LINEAR MOVE SYSTEM

    Technology Transfer Automated Retrieval System (TEKTRAN)

    An off-the-shelf PLC-based control system has been developed and field tested to enable site-specific irrigation of multiple 50 ft X 80 ft research plots using either mid-elevation spray heads (MESA) and low energy precision application (LEPA) irrigation methods on linear move sprinkler systems. Bo...

  12. Hydrologic utility of borehole temperatures in Areas 19 and 20, Pahute Mesa, Nevada Test Site

    Microsoft Academic Search

    E. J. Pottorff; S. J. Erikson; M. E. Campana

    1987-01-01

    Borehole temperature logs from Areas 19 and 20 of the Nevada Test Site were examined in an attempt to obtain quantitative information on the hydrologic regime of Pahute Mesa. A qualitative assessment of the logs proved useful for identifying borehole static water levels and areas of water influx into the borehole. However, the uncertain quality of the data and the

  13. Magnetotelluric Data, Rainier Mesa/Shoshone Mountain, Nevada Test Site, Nevada.

    SciTech Connect

    Jackie M. Williams; Jay A. Sampson; Brian D. Rodriguez; and Theodore H. Asch.

    2006-11-03

    The United States Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing ground-water contamination resulting from historical underground nuclear testing through the Environmental Management (EM) program and, in particular, the Underground Test Area (UGTA) project. From 1951 to 1992, 828 underground nuclear tests were conducted at the Nevada Test Site northwest of Las Vegas. Most of these tests were conducted hundreds of feet above the ground-water table; however, more than 200 of the tests were near or within the water table. This underground testing was limited to specific areas of the Nevada Test Site, including Pahute Mesa, Rainier Mesa/Shoshone Mountain, Frenchman Flat, and Yucca Flat. One issue of concern is the nature of the somewhat poorly constrained pre-Tertiary geology, and its effects on ground-water flow. Ground-water modelers would like to know more about the hydrostratigraphy and geologic structure to support a hydrostratigraphic framework model that is under development for the Rainier Mesa/Shoshone Mountain Corrective Action Unit (Bechtel Nevada, 2006). During 2005, the U.S. Geological Survey (USGS), in cooperation with the DOE and NNSA-NSO, collected and processed data from twenty-six magnetotelluric (MT) and audio-magnetotelluric (AMT) sites at the Nevada Test Site. The 2005 data stations were located on and near Rainier Mesa and Shoshone Mountain to assist in characterizing the pre-Tertiary geology in those areas. These new stations extend the area of the hydrogeologic study previously conducted in Yucca Flat. This work will help refine what is known about the character, thickness, and lateral extent of pre-Tertiary confining units. In particular, a major goal has been to define the upper clastic confining unit (UCCU – late Devonian to Mississippian-age siliciclastic rocks assigned to the Eleana Formation and Chainman Shale) from the Yucca Flat area and west towards Shoshone Mountain, to Buckboard Mesa in the south, and onto Rainier Mesa in the north. Subsequent interpretation will include a three-dimensional (3-D) character analysis and a two-dimensional (2-D) resistivity model. The purpose of this report is to release the MT sounding data for the twenty-six stations shown in figure 1. No interpretation of the data is included here.

  14. Hydraulic Fracture Stimulation Treatments at East Mesa, Well 58-30; Geothermal Reservoir Well Stimulation Program; Experiment 3 and 4

    SciTech Connect

    None

    1982-02-01

    The tests reported were part of the DOE Geothermal Reservoir Well Stimulation Program. This East Mesa (Imperial Valley, CA) well was successfully stimulated with two fracture treatments, a dendritic fracture and a planar fracture. The natural flow production of the well increased 114 percent, to 197,900 lb/hr. These tests were among the few successful attempts of this program to increase flow from geothermal production wells. The general belief is that these tests worked OK primarily because the formation was sedimentary rock (similar to rock in most oil and gas wells that have been stimulated successfully. Similar tests in geothermal hard rock reservoirs did not work very well. (DJE 2005)

  15. Bacterial heterogeneity in deep subsurface tunnels at Rainier Mesa, Nevada test site

    Microsoft Academic Search

    D. L. Haldeman; P. S. Amy

    1993-01-01

    To characterize the deep subsurface environment of Rainier Mesa, Nevada Test Site, rock samples were taken from tunnels U 12b, U12g, U12p, and U 12n, which varied in depth from 50 m to 450 m and in gravimetric moisture content from 4% to 27%. Values for total count, viable count, biomass, Simpson diversity, equitability, similarity coefficient, and number of distinct

  16. Mesa = Table

    NASA Technical Reports Server (NTRS)

    2006-01-01

    10 August 2006 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows two mesas on the northern plains of Mars. 'Mesa' is the Spanish word for 'table,' and that is a very good description of the two elliptical features captured in this MOC image. In both cases, the mesa tops and the material beneath them, down to the level of the surrounding, rugged plain, are remnants of a once more extensive layer (or layers) of material that has been largely eroded away. The circular feature near the center of the larger mesa is the site of a filled and buried impact crater.

    Location near: 53.5oN, 153.5oW Image width: 3 km (1.9 mi) Illumination from: lower left Season: Northern Spring

  17. Geologic Surface Effects of Underground Nuclear Testing, Buckboard Mesa, Climax Stock, Dome Mountain, Frenchman Flat, Rainier/Aqueduct Mesa, and Shoshone Mountain, Nevada Test Site, Nevada

    USGS Publications Warehouse

    Grasso, Dennis N.

    2003-01-01

    Surface effects maps were produced for 72 of 89 underground detonations conducted at the Frenchman Flat, Rainier Mesa and Aqueduct Mesa, Climax Stock, Shoshone Mountain, Buckboard Mesa, and Dome Mountain testing areas of the Nevada Test Site between August 10, 1957 (Saturn detonation, Area 12) and September 18, 1992 (Hunters Trophy detonation, Area 12). The ?Other Areas? Surface Effects Map Database, which was used to construct the maps shown in this report, contains digital reproductions of these original maps. The database is provided in both ArcGIS (v. 8.2) geodatabase format and ArcView (v. 3.2) shapefile format. This database contains sinks, cracks, faults, and other surface effects having a combined (cumulative) length of 136.38 km (84.74 mi). In GIS digital format, the user can view all surface effects maps simultaneously, select and view the surface effects of one or more sites of interest, or view specific surface effects by area or site. Three map layers comprise the database. They are: (1) the surface effects maps layer (oase_n27f), (2) the bar symbols layer (oase_bar_n27f), and (3) the ball symbols layer (oase_ball_n27f). Additionally, an annotation layer, named 'Ball_and_Bar_Labels,' and a polygon features layer, named 'Area12_features_poly_n27f,' are contained in the geodatabase version of the database. The annotation layer automatically labels all 295 ball-and-bar symbols shown on these maps. The polygon features layer displays areas of ground disturbances, such as rock spall and disturbed ground caused by the detonations. Shapefile versions of the polygon features layer in Nevada State Plane and Universal Transverse Mercator projections, named 'area12_features_poly_n27f.shp' and 'area12_features_poly_u83m.shp,' are also provided in the archive.

  18. Hydraulic Property and Soil Textural Classification Measurements for Rainier Mesa, Nevada Test Site, Nevada

    USGS Publications Warehouse

    Ebel, Brian A.; Nimmo, John R.

    2010-01-01

    This report presents particle size analysis, field-saturated hydraulic conductivity measurements, and qualitative descriptions of surficial materials at selected locations at Rainier Mesa, Nevada. Measurements and sample collection were conducted in the Rainier Mesa area, including unconsolidated sediments on top of the mesa, an ephemeral wash channel near the mesa edge, and dry U12n tunnel pond sediments below the mesa. Particle size analysis used a combination of sieving and optical diffraction techniques. Field-saturated hydraulic conductivity measurements employed a single-ring infiltrometer with analytical formulas that correct for falling head and spreading outside the ring domain. These measurements may prove useful to current and future efforts at Rainier Mesa aimed at understanding infiltration and its effect on water fluxes and radionuclide transport in the unsaturated zone.

  19. Hydraulic Property and Soil Textural Classification Measurements for Rainier Mesa, Nevada Test Site, Nevada

    SciTech Connect

    Ebel, Brian A.; Nimmo, John R.

    2009-12-29

    This report presents particle size analysis, field-saturated hydraulic conductivity measurements, and qualitative descriptions of surficial materials at selected locations at Rainier Mesa, Nevada. Measurements and sample collection were conducted in the Rainier Mesa area, including unconsolidated sediments on top of the mesa, an ephemeral wash channel near the mesa edge, and dry U12n tunnel pond sediments below the mesa. Particle size analysis used a combination of sieving and optical diffraction techniques. Field-saturated hydraulic conductivity measurements employed a single-ring infiltrometer with analytical formulas that correct for falling head and spreading outside the ring domain. These measurements may prove useful to current and future efforts at Rainier Mesa aimed at understanding infiltration and its effect on water fluxes and radionuclide transport in the unsaturated zone.

  20. Magnetotelluric Data, Rainier Mesa/Shoshone Mountain, Nevada Test Site, Nevada

    USGS Publications Warehouse

    Williams, Jackie M.; Sampson, Jay A.; Rodriguez, Brian D.; Asch, Theodore H.

    2006-01-01

    Introduction: The United States Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing ground-water contamination resulting from historical underground nuclear testing through the Environmental Management (EM) program and, in particular, the Underground Test Area (UGTA) project. During 2005, the U.S. Geological Survey (USGS), in cooperation with the DOE and NNSA-NSO, collected and processed data from twenty-six magnetotelluric (MT) and audio-magnetotelluric (AMT) sites at the Nevada Test Site. The 2005 data stations were located on and near Rainier Mesa and Shoshone Mountain to assist in characterizing the pre-Tertiary geology in those areas. These new stations extend the area of the hydrogeologic study previously conducted in Yucca Flat. The MT data presented in this report will help refine what is known about the character, thickness, and lateral extent of pre Tertiary confining units. Subsequent interpretation will include a three dimensional (3 D) character analysis and a two-dimensional (2 D) resistivity model. The purpose of this report is to release the MT sounding data. No interpretation of the data is included here.

  1. Predictions of Long-Term Radionuclide Transport at Rainier Mesa, Nevada National Security Site

    NASA Astrophysics Data System (ADS)

    Reeves, D. M.; Parashar, R.; Pohlmann, K. F.; LaBolle, E. M.; Zhang, Y.; Russell, C. E.; Chapman, J. B.

    2011-12-01

    Rainier Mesa, a tuffaceous plateau on the Nevada National Security Site, has been the location of numerous subsurface nuclear tests conducted in a series of tunnel complexes located approximately 400 m below the top of the mesa and 400 m above the regional groundwater flow system. The tunnels were constructed near the middle of an 800 m Tertiary sequence of faulted, low-permeability welded and non-welded bedded, vitric, and zeolitized tuff units. Water levels from wells in the vicinity of both the N- and T-tunnel complexes indicate the presence of two saturated zones. The first saturated zone has an elevation of approximately 1800 m (300 mbgs) and is located 100 m above the T-tunnel complex. Water level measurements during well construction and borehole moisture profiles of matrix saturation suggest this upper zone of saturation extends downward through most of the Tertiary sequence, though data is not available for the lowest Tertiary units. The second saturated zone is located at an elevation of 1300 m (800 mbgs) within a thrust sheet of Paleozoic carbonates and may be hydraulically connected to the Death Valley regional flow system. This study evaluates the potential for downward radionuclide transport associated with six underground tests at the T-tunnel complex over a 1000 year period. A dual-permeability (DKM) model containing spatially discontinuous fault networks within low-permeability tuff units is utilized to simulate complex patterns of variably-saturated flow. A modified random walk particle tracking code for DKM velocity fields is then used to compute radionuclide breakthrough at the regional water table (second saturated zone). Results include calibration of a variably-saturated model to field observations including water discharge history at the tunnel portal, variably-saturated fault fields, water levels in perched intervals and differential saturations in the volcanics and carbonates; and predictions of radionuclide breakthrough at the regional water table given uncertainty in fault network geometry, fault hydraulic properties, recharge and radionuclide adsorption and diffusion.

  2. VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST TOWER VIEW INCLUDES STRUCTURAL DYNAMICS TEST STAND COLD CALIBRATION TEST STAND AND COMPONENTS TEST LAB. - Marshall Space Flight Center, East Test Area, Dodd Road, Huntsville, Madison County, AL

  3. VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST TOWER VIEW INCLUDES SATURN V STAND (BACKGROUND), BLOCK HOUSE (MIDDLE GROUND), STRUCTURAL DYNAMICS TEST STAND (FAR RIGHT). - Marshall Space Flight Center, East Test Area, Dodd Road, Huntsville, Madison County, AL

  4. Hydraulic testing techniques of deep drill holes at Pahute Mesa, Nevada test site

    USGS Publications Warehouse

    Blankennagel, R.K.

    1967-01-01

    This report describes the testing techniques used by the U. S. Geological Survey to obtain hydrologic data in deep holes drilled in volcanic rocks at Pahute Mesa, Nevada Test Site. The testing program in each hole includes geophysical logging, pumping, and injecting and swabbing between straddle packers. Rock lithologies and qualitative data on hydrologic conditions in the borehole are obtained from electric, caliper, temperature, and fluid resistivity logs. Quantitative data on major water-yielding intervals in the borehole are obtained from radioactive tracer and spinner surveys. Pumping tests are made to measure the combined yield of the various aquifers. Injection and swabbing tests are made by adding known volumes of water to, or withdrawing known volumes of water from, straddle-packed intervals and observing the rate of decline or rise in water level resulting from this injection or withdrawal of water. The yield of tested intervals is stated as relative specific capacity, in units of gallons per minute per foot of drawdown.

  5. Reducing Uncertainty in the Distribution of Hydrogeologic Units within Volcanic Composite Units of Pahute Mesa Using High-Resolution 3-D Resistivity Methods, Nevada Test Site, Nevada

    USGS Publications Warehouse

    Rodriguez, Brian D.; Sweetkind, Don; Burton, Bethany L.

    2010-01-01

    The U.S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing groundwater contamination resulting from historical underground nuclear testing through the Environmental Management program and, in particular, the Underground Test Area (UGTA) project. From 1951 to 1992, 828 underground nuclear tests were conducted at the Nevada Test Site (NTS) northwest of Las Vegas (DOE UGTA, 2003). Most of these tests were conducted hundreds of feet above the groundwater table; however, more than 200 of the tests were near, or within, the water table. This underground testing was limited to specific areas of the NTS including Pahute Mesa, Rainier Mesa/Shoshone Mountain, Frenchman Flat, and Yucca Flat. Volcanic composite units make up much of the area within the Pahute Mesa Corrective Action Unit (CAU) at the NTS, Nevada. The extent of many of these volcanic composite units extends throughout and south of the primary areas of past underground testing at Pahute and Rainier Mesas. As situated, these units likely influence the rate and direction of groundwater flow and radionuclide transport. Currently, these units are poorly resolved in terms of their hydrologic properties introducing large uncertainties into current CAU-scale flow and transport models. In 2007, the U.S. Geological Survey (USGS), in cooperation with DOE and NNSA-NSO acquired three-dimensional (3-D) tensor magnetotelluric data at the NTS in Area 20 of Pahute Mesa CAU. A total of 20 magnetotelluric recording stations were established at about 600-m spacing on a 3-D array and were tied to ER20-6 well and other nearby well control (fig. 1). The purpose of this survey was to determine if closely spaced 3-D resistivity measurements can be used to characterize the distribution of shallow (600- to 1,500-m-depth range) devitrified rhyolite lava-flow aquifers (LFA) and zeolitic tuff confining units (TCU) in areas of limited drill hole control on Pahute Mesa within the Calico Hills zeolitic volcanic composite unit (VCU), an important hydrostratigraphic unit in Area 20. The resistivity response was evaluated and compared with existing well data and hydrogeologic unit tops from the current Pahute Mesa framework model. In 2008, the USGS processed and inverted the magnetotelluric data into a 3-D resistivity model. We interpreted nine depth slices and four west-east profile cross sections of the 3-D resistivity inversion model. This report documents the geologic interpretation of the 3-D resistivity model. Expectations are that spatial variations in the electrical properties of the Calico Hills zeolitic VCU can be detected and mapped with 3-D resistivity, and that these changes correlate to differences in rock permeability. With regard to LFA and TCU, electrical resistivity and permeability are typically related. Tuff confining units will typically have low electrical resistivity and low permeability, whereas LFA will have higher electrical resistivity and zones of higher fracture-related permeability. If expectations are shown to be correct, the method can be utilized by the UGTA scientists to refine the hydrostratigraphic unit (HSU) framework in an effort to more accurately predict radionuclide transport away from test areas on Pahute and Rainier Mesas.

  6. Bacterial heterogeneity in deep subsurface tunnels at Rainier Mesa, Nevada test site.

    PubMed

    Haldeman, D L; Amy, P S

    1993-03-01

    To characterize the deep subsurface environment of Rainier Mesa, Nevada Test Site, rock samples were taken from tunnels U 12b, U12g, U12p, and U 12n, which varied in depth from 50 m to 450 m and in gravimetric moisture content from 4% to 27%. Values for total count, viable count, biomass, Simpson diversity, equitability, similarity coefficient, and number of distinct colony types indicated microbiological variability between samples. Viable counts ranged from less than 1 × 10(1) to 2.4 × 10(5) CFU g dry wt(-1) of rock. Direct counts and enumeration based on phospholipid determination indicated larger numbers of cells g dry wt-1 of rock than viable counts. Simpson diversity indices, equitability, and numbers of distinct colony types varied from 3.00 to 8.05, 0.21 to 0.89, and 7 to 19, respectively, and indicated heterogeneity between samples. Each distinct morphotype was purified and characterized. Gram reaction, morphology, metal and antibiotic resistances, and metabolic activities of each isolate confirmed spatial variability among microbiota isolated from different locations. Most probable numbers of nitrifying, sulfur oxidizing, and sulfur-reducing bacteria were below the limit of detection in all samples, while the numbers of nitrogen fixing bacteria ranged from below the level of detection to 7.8 × 10(2) cells g dry wt(-1) of rock sample, and the numbers of dentrifying bacteria ranged from below the level of detection to greater than 1.6 × 10(3) cells g dry wt(-1) of rock sample. PMID:24189814

  7. Simple estimation of minimum unsaturated contaminant travel times at Rainier Mesa and Shoshone Mountain, Nevada Test Site

    NASA Astrophysics Data System (ADS)

    Ebel, B. A.; Nimmo, J. R.

    2008-12-01

    In the unsaturated zone the fastest travel times frequently occur via preferential flow that bypasses the soil/rock matrix. Experimental data provide compelling evidence that minimum solute travel times through preferential paths depend primarily on whether water supply is continuous versus non-continuous in time, with little influence from matrix hydraulic properties. We employ a simple model based on this "source- responsive" paradigm to estimate minimum preferential travel times to the regional water table for nonreactive radionuclides at Rainier Mesa and Shoshone Mountain within the Nevada Test Site. The radionuclides at the site originate from underground nuclear testing within a ~1-km-thick unsaturated zone. Contaminated sources at Rainier Mesa and Shoshone Mountain that are continuously supplied include ponded water in certain tunnels, filled detention basins, and partially-filled boreholes with detonation cavities. Tunnels without ponding and unfilled detonation cavities are considered non-continuous sources supplied by percolation of precipitation. Decades of geological and hydrological characterizations provide the foundation for establishing preferential flow as a viable transport mechanism at Rainier Mesa and Shoshone Mountain Our estimated minimum travel times via preferential flow for Rainier Mesa are one to two months for a continuously-supplied source and tens to hundreds of years for a non-continuous source. Previous studies in the scientific literature conducted isotopic analysis of fracture water collected in tunnels at Rainier Mesa that indicated transit times for 400 m of transport from land surface to tunnel levels of one to 40 years. Four monitoring wells in the carbonate aquifer have not detected radionuclide levels above the drinking water standards at Rainier Mesa. Travel times for both the continuously and non-continuously supplied sources at Shoshone Mountain are twice the Rainier Mesa estimates, resulting from longer transport distances and less precipitation. A shale confining unit at Shoshone Mountain may cause a transition from preferential to matrix dominated flow, increasing estimated transport times to more than a thousand years. Concentrations of radionuclides above the drinking water standard have not been detected in a deep well or in springs at Shoshone Mountain. Preliminary results from our analysis indicate the potentially rapid nature of unsaturated-zone preferential transport (despite a semi-arid climate) for continuous sources and highlight the value of a simple modeling approach to complement traditional, more complex flow simulation approaches for contaminant travel time estimation.

  8. Micrometeorological and Soil Data for Calculating Evapotranspiration for Rainier Mesa, Nevada Test Site, Nevada 2002-05.

    SciTech Connect

    Guy A. DeMeo; Alan L. Flint; Randell J. Laczniak; Walter E. Nylund

    2006-12-28

    Micrometeorological and soil-moisture data were collected at two instrumented sites on Rainier Mesa at the Nevada Test Site, January 1, 2002/August 23, 2005. Data collected at each site include net radiation, air temperature, and relative humidity at two heights; wind speed and direction; subsurface soil heat flux; subsurface soil temperature; volumetric soil water; and matric water potential. These data were used to estimate 20-minute average and daily average evapotranspiration values. The data presented in this report are collected and calculated evapotranspiration rates.

  9. Micrometeorological and Soil Data for Calculating Evapotranspiration for Rainier Mesa, Nevada Test Site, Nevada, 2002-05

    USGS Publications Warehouse

    DeMeo, Guy A.; Flint, Alan L.; Laczniak, Randell J.; Nylund, Walter E.

    2006-01-01

    Micrometeorological and soil-moisture data were collected at two instrumented sites on Rainier Mesa at the Nevada Test Site, January 1, 2002 - August 23, 2005. Data collected at each site include net radiation, air temperature, and relative humidity at two heights; wind speed and direction; subsurface soil heat flux; subsurface soil temperature; volumetric soil water; and matric water potential. These data were used to estimate 20-minute average and daily average evapotranspiration values. The data presented in this report are collected and calculated evapotranspiration rates.

  10. 9. East oblique of missile site control building Stanley ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. East oblique of missile site control building - Stanley R. Mickelsen Safeguard Complex, Missile Site Control Building, Northeast of Tactical Road; southeast of Tactical Road South, Nekoma, Cavalier County, ND

  11. Preliminary geologic section from Pahute Mesa, Nevada Test Site, to Enterprise, Utah

    USGS Publications Warehouse

    Barosh, P.J.

    1967-01-01

    The 154-mile long geologic cross section trends nearly perpendicular to the structural grain of the Basin-Range province in Nevada, and in Utah extends eastward into the transition zone between the Basin-Range and Colorado Plateau provinces. The structure is characterized by complex thrust: faults, involving uppermost Precambrian to lower Mesozoic sedimentary rocks, and normal faults which cut: the thick sequence of Tertiary volcanic rocks as well as older rocks. Some of the normal faults are the result of caldera collapse. The principal normal faults trend northerly west: of Delamar, Nev., and form north-trending basins and ranges. Farther east the principal faults trend northwesterly, and form a moderately rugged highland rather than distinct basins and ranges. The uppermost Precambrian-Paleozoic strata thin markedly eastward across the region. The pre-Pennsylvanian sedimentary rocks vary from 32,500 feet: in thickness at the Nevada Test: Site (Harley Barnes, E. N. Hinrichs, F. A. McKeown and P. P. Orkild, written commun., 1963) to 4,500 feet: in the Beaver Dam Mountains in western Utah (Cook, 1960). Thick Mesozoic deposits, similar to those of the Colorado Plateau, are present in western Utah, but are represented in eastern Nevada by only thin patches of Triassic rock.

  12. Seismicity of the Pahute Mesa area, Nevada Test Site: 8 October 1975 to 30 June 1976

    USGS Publications Warehouse

    Rogers, A.M.; Wuollet, Geraldine M.; Covington, P.A.

    1977-01-01

    A total of 1,075 earthquakes occurred in the Pahute Mesa area with 2.5?ML?4.9 during the period October 28, 1975, to June 28, 1976. The majority of these earthquakes are aftershocks of the nuclear events, Kasseri, Inlet, Muenster, Fontina, Cheshire, Estuary, Colby, and Pool (5.8?ML?6.3). Smaller nuclear events (ML?5.5) on Rainier Mesa and Yucca Flat detonated in the same time period did not trigger aftershock sequences. The aftershock series were displaced laterally from ground zero and occurred deeper (at 4–6 km) than the nuclear even depth of burial (~1 km). The aftershocks appear to occur on vertical faults with approximately north-south strike.

  13. VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF EAST TEST SITE FROM TOP OF STATIC TEST TOWER VIEW INCLUDES POWER PLANT TEST STAND AND SATURN V TEST STAND IN THE WEST TEST AREA (FAR BACKGROUND). - Marshall Space Flight Center, East Test Area, Dodd Road, Huntsville, Madison County, AL

  14. Development of Phenomenological Models of Underground Nuclear Tests on Pahute Mesa, Nevada Test Site - BENHAM and TYBO

    SciTech Connect

    Pawloski, G.A.

    1999-09-21

    Although it is well accepted that underground nuclear explosions modify the in situ geologic media around the explosion point, the details of these changes are neither well understood nor well documented. As part of the engineering and containment process before a nuclear test, the physical environment is characterized to some extent to predict how the explosion will interact with the in situ media. However, a more detailed characterization of the physical environment surrounding an expended site is needed to successfully model radionuclide transport in the groundwater away from the detonation point. It is important to understand how the media have been altered and where the radionuclides are deposited. Once understood, this information on modified geologic media can be incorporated into a phenomenological model that is suitable for input to computer simulations of groundwater flow and radionuclide transport. The primary goals of this study are to (1) identify the modification of the media at a pertinent scale, and (2) provide this information to researchers modeling radionuclide transport in groundwater for the US Department of Energy (DOE) Nevada Operations Office Underground Test Area (UGTA) Project. Results from this study are most applicable at near-field scale (a model domain of about 500 m) and intermediate-field scale (a model domain of about 5 km) for which detailed information can be maximized as it is incorporated in the modeling grids. UGTA collected data on radionuclides in groundwater during recent drilling at the ER-20-5 site, which is near BENHAM and TYBO on Pahute Mesa at the Nevada Test Site (NTS). Computer simulations are being performed to better understand radionuclide transport. The objectives of this modeling effort include: evaluating site-specific information from the BENHAM and TYBO tests on Pahute Mesa; augmenting the above data set with generalized containment data; and developing a phenomenological model suitable for input to groundwater flow and transport modeling efforts that describes the physical in situ environment after the BENHAM and TYBO nuclear explosions.

  15. 10. East oblique of missile site control building, with better ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. East oblique of missile site control building, with better view of exhaust (the taller columns) and intake shafts - Stanley R. Mickelsen Safeguard Complex, Missile Site Control Building, Northeast of Tactical Road; southeast of Tactical Road South, Nekoma, Cavalier County, ND

  16. Data Report: Meteorological and Evapotranspiration Data from Sagebrush and Pinyon Pine/Juniper Communities at Pahute Mesa, Nevada National Security Site, 2011-2012

    SciTech Connect

    Jasoni, Richard L [DRI; Larsen, Jessica D [DRI; Lyles, Brad F. [DRI; Healey, John M [DRI; Cooper, Clay A [DRI; Hershey, Ronald L [DRI; Lefebre, Karen J [DRI

    2013-04-01

    Pahute Mesa is a groundwater recharge area at the Nevada National Security Site. Because underground nuclear testing was conducted at Pahute Mesa, groundwater recharge may transport radionuclides from underground test sites downward to the water table; the amount of groundwater recharge is also an important component of contaminant transport models. To estimate the amount of groundwater recharge at Pahute Mesa, an INFIL3.0 recharge-runoff model is being developed. Two eddy covariance (EC) stations were installed on Pahute Mesa to estimate evapotranspiration (ET) to support the groundwater recharge modeling project. This data report describes the methods that were used to estimate ET and collect meteorological data. Evapotranspiration was estimated for two predominant plant communities on Pahute Mesa; one site was located in a sagebrush plant community, the other site in a pinyon pine/juniper community. Annual ET was estimated to be 310±13.9 mm for the sagebrush site and 347±15.9 mm for the pinyon pine/juniper site (March 26, 2011 to March 26, 2012). Annual precipitation measured with unheated tipping bucket rain gauges was 179 mm at the sagebrush site and 159 mm at the pinyon pine/juniper site. Annual precipitation measured with bulk precipitation gauges was 222 mm at the sagebrush site and 227 mm at the pinyon pine/juniper site (March 21, 2011 to March 28, 2012). A comparison of tipping bucket versus bulk precipitation data showed that total precipitation measured by the tipping bucket rain gauges was 17 to 20 percent lower than the bulk precipitation gauges. These differences were most likely the result of the unheated tipping bucket precipitation gauges not measuring frozen precipitation as accurately as the bulk precipitation gauges. In this one-year study, ET exceeded precipitation at both study sites because estimates of ET included precipitation that fell during the winter of 2010-2011 prior to EC instrumentation and the precipitation gauges started collecting data in March 2011.

  17. Circular Mesa

    NASA Technical Reports Server (NTRS)

    2003-01-01

    MGS MOC Release No. MOC2-538, 8 November 2003

    This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a circular mesa in northeast Arabia Terra. The circularity suggests that this landform might be similar to other circular mesas, found elsewhere on Mars. In those other cases, the mesa was once a meteor impact crater. The crater was filled with sediment, the sediment was cemented to become rock, and later erosion removed all of the material surrounding the former crater, leaving it standing alone as a circular mesa. This image is located near 23.7oN, 319.0oW, and covers an area 3 km (1.9 mi) wide. The scene is illuminated by sunlight from the left.

  18. Summary of micrographic analysis of fracture coating phases on drill cores from Pahute Mesa, Nevada Test Site. Revision 1

    SciTech Connect

    NONE

    1998-12-01

    The flow path between Pahute Mesa and the groundwater discharge area in Oasis Valley (approximately 18 miles to the southwest) is of concern due to the relatively short travel distance between a recharge area where underground nuclear testing has been conducted and the off-site water users. Groundwater flow and transport modeling by IT Corporation (IT) has shown rapid tritium transport in the volcanic rock aquifers along this flow path. The resultant estimates of rapid transport were based on water level data, limited hydraulic conductivity data, estimates of groundwater discharge rates in Oasis Valley, assumed porosities, and estimated retardation rates. Many of these parameters are poorly constrained and may vary considerably. Sampling and analytical techniques are being applied as an independent means to determine transport rates by providing an understanding of the geochemical processes that control solute movement along the flow path. As part of these geochemical investigations, this report summarizes the analysis of fracture coating mineral phases from drill core samples from the Pahute mesa area of the Nevada Test Site (NTS). Archived samples were collected based on the presence of natural fractures and on the types and abundance of secondary mineral phases present on those fracture surfaces. Mineral phases present along fracture surfaces are significant because, through the process of water-rock interaction, they can either contribute (as a result of dissolution) or remove (as a result of precipitation or adsorption) constituents from solution. Particular attention was paid to secondary calcite occurrences because they represent a potential source of exchangeable carbon and can interact with groundwater resulting in a modified isotopic signature and apparent water age.

  19. 2. EAST SIDE; LOOKING WEST FROM SITE OF STOCKYARDS; UPPER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. EAST SIDE; LOOKING WEST FROM SITE OF STOCKYARDS; UPPER LEFT CORNER WAS ORIGINALLY ATTACHED TO SHEEP HOTEL (BUILDING 142); UPPER RIGHT CORNER WAS ORIGINALLY ATTACHED TO HOG HOTEL (BUILDING 138) - Rath Packing Company, Beef Killing Building, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

  20. Stockholm Institute of Transition Economics and East European Economies (SITE)

    NSDL National Science Digital Library

    The Stockholm Institute of Transition Economics and East European Economies (SITE/Ã?stekonomiska Institutet) is an independent research institute at the Stockholm School of Economics. SITE is concerned with the transition from planned to market economies in Eastern Europe and the former Soviet Union. Academic research on-site includes a bibliography of recent working papers (1990-present), with most papers from 1998 available for download [.pdf]. Monthly updates of key indicators discussed in the quarterly SITE publication Russian Economic Trends (RET) are also available [.pdf] in addition to RET subscription information and other discussion channels.

  1. Post-Silent Canyon caldera structural setting for Pahute Mesa

    SciTech Connect

    Warren, R.G.; Byers, F.M. Jr.; Orkild, P.P.

    1985-12-31

    At Pahute Mesa, Nevada Test Site, the Silent Canyon caldera of about 14 Ma age is almost completely concealed beneath ash-flow tuffs of the 11.5 Ma old Rainier Mesa Member of the Timber Mountain Tuff. Structures unequivocally related to the caldera are not observed in the Rainier Mesa Member. Structure contours on top of Rainier Mesa Member at Pahute Mesa define a series of elongate, fault-bounded blocks. Between the East Boxcar and Almendro Faults these blocks tilt eastward away from westward-dipping normal faults and elsewhere they also have a strong northward component of dip, away from Timber Mountain caldera. Episodic movement along these faults controlled thicknesses of members of Paintbrush Tuff (13.3 - 12.7 Ma) and tuffs and lavas of Area 20 (14 - 13.3 Ma), which have steeper eastward and northward components of dip than the overlying Rainier Mesa Member and also thicken eastward within each structural block. Fault blocks north of Timber Mountain caldera on Pahute Mesa are very similar to blocks described at Yucca mountain south of the caldera, and probably were generated by regional Basin and Range extension and four episodes of caldera-forming volcanism at Timber Mountain. Faults bounding these blocks on Pahute Mesa formed during early episodes of caldera-forming volcanism at Timber Mountain and reactivated during later episodes, so that fault displacements and bedding plane attitudes increase with age. Because these faults have episodic activity, even a relatively small post-Rainier Mesa displacement may define the location of important displacement within underlying units.

  2. Database of Ground-Water Levels in the Vicinity of Rainier Mesa, Nevada Test Site, Nye County, Nevada 1957-2005.

    SciTech Connect

    Joseph M. Fenelon

    2006-08-15

    More than 1,200 water-level measurements from 1957 to 2005 in the Rainier Mesa area of the Nevada Test Site were quality assured and analyzed. Water levels were measured from 50 discrete intervals within 18 boreholes and from 4 tunnel sites. An interpretive database was constructed that describes water-level conditions for each water level measured in the Rainier Mesa area. Multiple attributes were assigned to each water-level measurement in the database to describe the hydrologic conditions at the time of measurement. General quality, temporal variability, regional significance, and hydrologic conditions are attributed for each water-level measurement. The database also includes hydrograph narratives that describe the water-level history of each well.

  3. East Brawley East MesaHeber

    E-print Network

    Mountain Lake City - Surprise Valley 1 & 2 INYO KERN SAN BERN ARDINO FRESNO RIVERSIDE SISKI YO U TULARE ELES BUTTE MADERA LAKE MERCED KINGS TUOLUM NE VENTURA GLENN SAN LUIS O BISPO PLACER YO LOSO NOMA EL RIVERSIDE SISKI YO U TULARE LASSEN MODO C MONO IMPERIAL SHASTA TRINI TY SAN DIEGO TEHAMA HUMBOLDT PLUMAS

  4. Modeling the fate of radionuclides in the unsaturated zone at the Nevada Test Site: Examples from Yucca Flat and Rainier Mesa

    NASA Astrophysics Data System (ADS)

    Kwicklis, E. M.; Dash, Z. V.; Viswanathan, H. S.; Levitt, D. G.; Lu, Z.; Dai, Z.; Zyvoloski, G.; Gable, C. W.; Miller, T. A.

    2010-12-01

    The Nevada Test Site (NTS), located 105 km northwest of Las Vegas, Nevada, hosted 828 underground nuclear explosions between 1951 and 1992, leaving an estimated 1.3e+08 curies of tritium, fission products, activation products and unspent fuel in the subsurface when the nuclear test moratorium was adopted in September, 1992. In two former testing areas of the NTS - Yucca Flat and Rainier Mesa- a significant fraction of the initial radionuclide inventory was introduced from nuclear tests with working points in the unsaturated zone. In Yucca Flat, an arid, low-elevation alluvium-filled basin where most tests were conducted in vertical shafts, unsaturated flow and transport models indicate that radionuclide migration to the water table is most likely where overlying subsidence craters receive significant infiltration from overland flow during infrequent runoff events. At Rainier Mesa, a wetter, high-elevation remnant of a once more extensive volcanic plateau, most tests were conducted at the ends of horizontal drifts in the vicinity of local perched water zones. Unsaturated flow and transport models of one of the larger tunnel complexes (N-tunnel) indicate that despite relatively high infiltration rates on the mesa, radionuclide diffusion from the flowing fractures to the porous matrix may significantly attenuate radionuclide movement to the water table.

  5. Flow and Radionuclide Transport Models of the Unsaturated Zone at the Nevada National Security Site: Examples from Yucca Flat and Rainier Mesa

    NASA Astrophysics Data System (ADS)

    Kwicklis, E. M.; Viswanathan, H. S.; Levitt, D. G.; Dash, Z.; Gable, C. W.; Lu, Z.; Dai, Z.; Zyvoloski, G.; Miller, T. A.

    2011-12-01

    The former Nevada Test Site (now the Nevada National Security Site) hosted 828 underground nuclear explosions between 1951 and 1992, leaving an estimated 1.3e+08 curies of tritium, fission products, activation products and unspent fuel in the subsurface when the nuclear test moratorium was adopted in September, 1992. In two former testing areas of the Nevada National Security Site - Yucca Flat and Rainier Mesa- a significant fraction of the initial radionuclide inventory was introduced from nuclear tests with working points in the unsaturated zone. In Yucca Flat, an arid, low-elevation alluvium-filled basin where most tests were conducted in vertical shafts, unsaturated flow and transport models indicate that radionuclide migration to the water table is most likely where overlying subsidence craters receive significant infiltration from overland flow during infrequent runoff events. These craters tend to be located along the perimeter of the basin and have large contributing watersheds in the surrounding hills. At Rainier Mesa, a wetter, high-elevation remnant of a once more extensive volcanic plateau, most tests were conducted at the ends of horizontal drifts in the vicinity of local perched water zones. Unsaturated flow and transport models of one of the larger tunnel complexes (N-tunnel) indicate that despite relatively high infiltration rates on the mesa, radionuclide diffusion from the flowing fractures to the porous matrix may significantly attenuate radionuclide movement to the water table, depending on the assumed fracture attributes. Simulations show that the tunnel itself may be an important hydraulic feature that connects radionuclide sources to sub-vertical faults that are assumed to extend to the water table.

  6. Quality assurance and analysis of water levels in wells on Pahute Mesa and vicinity, Nevada Test Site, Nye County, Nevada

    USGS Publications Warehouse

    Fenelon, Joseph M.

    2000-01-01

    Periodic and continual water-level data from 1963 to 1998 were compiled and quality assured for 65 observation wells on Pahute Mesa and vicinity, Nye County, Nevada. As part of the quality assurance of all water levels, ancillary data pertinent to computing hydraulic heads in wells were compiled and analyzed. Quality-assured water levels that were not necessarily in error but which did not represent static heads in the regional aquifer system, or required some other qualification, were flagged. Water levels flagged include those recovering from recent pumping or well construction, water levels affected by nuclear tests, and measurements affected by borehole deviations. A cursory examination of about 30 wells with available water-level and down-hole temperature data indicate that water levels in most wells on Pahute Mesa would not be significantly affected by temperature if corrected to 95 degrees Fahrenheit. Wells with large corrections (greater than 10 feet) are those with long water columns (greater than 1,500 feet of water above the assumed point of inflow) in combination with mean water-column temperatures exceeding 105 degrees Fahrenheit. Water-level fluctuations in wells on Pahute Mesa are caused by several factors including infiltration of precipitation, barometric pressure, Earth tides, ground-water pumpage, and seismic events caused by tectonic activity and underground nuclear testing. No observed water-level fluctuations were attributed to a naturally occurring earthquake. The magnitude and duration of changes in water levels caused by nuclear tests are affected by the test size and the distance from a well to the test. Identifying water levels that might be affected by past nuclear tests is difficult because pre-testing water-level data are sparse. Hydrologically significant trends were found in 13 of 25 wells with multiple years of water-level record. The largest change in water levels (1,029 feet in 25 years) occurred in well U-19v PS 1D as a result of the Almendro nuclear test. Likely explanations for trends in most of the wells are either changes in precipitation patterns that affect recharge rates to the ground-water system, pumping effects from water-supply well U-20 WW, or a combination of these two factors.

  7. Soil-site relationships for natural stands of longleaf pine (Pinus palustris Mill.) in east Texas

    E-print Network

    Larson, Eric Hays

    1971-01-01

    SOIL-SITE RELATIONSHIPS FOR NATURAL STANDS OF LONGLEAF PINE (PINUS PALUSTRIS MILL. ) IN EAST TEXAS A Thesis by ERIC HAYS LARSON Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE December 1971 Najor Subject: Forest Science SOIL-SITE RELATIONSHIPS FOR NATURAL STANDS OF LONGLEAF PINE (PINUS PALUSTRIS MILL. ) IN EAST TEXAS A Thesis by ERIC HAYS LARSON Approved as to style and content by: a rman...

  8. Analysis of the Variability of Classified and Unclassified Radiological Source term Inventories in the Rainier Mesa/Shoshone Mountain Area, Nevada Test Site

    SciTech Connect

    Zhao, P; Zavarin, M

    2008-06-04

    It has been proposed that unclassified source terms used in RM/SM reactive transport modeling investigations should be based on yield-weighted source terms calculated using the RM/SM average source term from Bowen et al. (2001) and the unclassified announced yields reported in DOE/NV-209. This unclassified inventory is likely to be used in unclassified contaminant boundary calculations and is, thus, relevant to compare to the classified inventory. They have examined the classified radionuclide inventory produced by 73 underground nuclear tests conducted in the Rainier Mesa/Shoshone Mountain (RM/SM) area of the Nevada Test Site. The goals were to (1) evaluate the variability in classified radiological source terms among the 73 tests and (2) and compare that variability and inventory uncertainties to an average unclassified inventory (e.g. Bowen 2001). To evaluate source term variability among the 73 tests, radiological inventories were compared on two relative scales: geometric mean and yield-weighted geometric mean. Furthermore, radiological inventories were either decay corrected to a common date (9/23/1992) or the time zero (t{sub 0}) of each test. Thus, a total of four data sets were produced. The date of 9/23/1992 was chosen based on the date of the last underground nuclear test at the Nevada Test Site.

  9. Addendum for the Groundwater Flow Model of Corrective Action Units 101 and 102: Central and Western Pahute Mesa, Nevada Test Site, Nye County, Nevada, Revision 0 (page changes)

    SciTech Connect

    John McCord

    2007-05-01

    This document, which makes changes to Groundwater Flow Model of Corrective Action Units 101 and 102: Central and Western Pahute Mesa, Nevada Test Site, Nye County, Nevada, S-N/99205--076, Revision 0 (June 2006) was prepared to address review comments of this final document by the Nevada Division of Environmental Protection (NDEP) in a letter dated July 19, 2006. The document includes revised pages that address NDEP review comments and comments from other document users. Change bars are included on these pages to identify where the text was revised. In addition to the revised pages, the following clarifications are made: • On Plate 1 (inserted in the back of the document), the ET Unit legend has been revised. The revised Plate 1 is included and replaces the original Plate 1. • Some of the Appendix D perturbation sensitivity analysis plots included on the CD for Sections D.3.1 and D.3.2 were not properly aligned. A revised CD is provided with all plots properly aligned.

  10. Report of drilling and radionuclide migration investigations at UE20n. number sign. 1, Pahute Mesa, Nevada Test Site, 1987

    SciTech Connect

    Erikson, S.J.

    1991-04-01

    Exploratory hole UE20n{number sign}1 was drilled 305 m down hydraulic gradient of the Cheshire event (U20n) as part of the Radionuclide Migration Program at the Nevada Test Site. The hole was designed to investigate the possibility of groundwater transport of radionuclides from the U20n cavity region. Drilling reached a total depth of 1005.8 m. Composite static water levels in the borehole were measured at approximately 620 m below ground surface. The borehole penetrated about 386 m of saturated zone, which was comprised primarily of rhyolite lava flows of the Upper Rhyolite Lavas, Tuffs, and Rhyolites of Area 20. Evidence from UE20n{number sign}1 suggests the presence of a relatively more permeable zone in the 730 to 750-m depth interval. The neutron log suggests that greater quantities of water were present at depths between 729 and 747 m. Core collected over three depth intervals showed the highest fracture density in a reddish-grey rhyolite lava flow in the 733.8 to 738.1-m core interval. Groundwater flow away from U20n through this permeable zone is suggested by the UE20n{number sign}1 borehole temperature logs. Elevated {sup 3}H activities were observed with the highest activities found near 732 m. The {sup 3}H activities observed in the 732 to 802-m interval in UE20n{number sign}1 were of similar magnitude to those found in the cavity region in the U20n post-shot hole. The activities of {sup 125}Sb and {sup 85}Kr, which are known to be mobile in groundwater, were of similar magnitude to those found near the cavity region, while {sup 137}Cs, which is thought to be adsorbed during transport, was found in activities two to three orders of magnitude lower than near the cavity. These temperature and radioisotope data suggest that radionuclide migration via groundwater flow may be occurring laterally from the U20n rubble chimney through the permeable zone located at the 730 to 750-m depth. 25 refs., 18 figs., 15 tabs.

  11. Soil-site relationships for natural stands of longleaf pine (Pinus palustris Mill.) in east Texas 

    E-print Network

    Larson, Eric Hays

    1971-01-01

    M. Moehring The objective of this study was to investigate the site relation- ships for longleaf pine in east Texas. Tree growth data were collected on 50 sample plots representing the range of existing ages and site conditions within the area... DESCRIPTION OF STUDY AREA A. Location. B. Climate . . C. Geology and Soils . D. Vegetation. IV METHODS . A. Sample Plot Selection B. Growth Data . . C. Soils Data. D. Analysis of Dafa Construction of Site Index Curves . Height-Age in Relation...

  12. An inventory survey at the site of the proposed Kilauea Middle East Rift Zone (KMERZ), Well Site No. 2

    SciTech Connect

    Kennedy, Joseph

    1991-03-01

    At the request of True Mid Pacific Geothermal, Archaeological Consultants of Hawaii, Inc. has conducted an inventory survey at the site of the proposed Kilauea Middle East Rift Zone (KMERZ), Well Site No.2, TMK: 1-2-10:3. The Principal Investigator was Joseph Kennedy M.A., assisted by Jacob Kaio, Field Supervisor and field crew Mark Borrello B.A., Michael O'Shaughnessy B.A., and Randy Adric. This report supercedes all previous reports submitted to the Historic Presentation Section of the Department of Land and Natural Resources. In addition to 100% surface coverage of the 400 x 400 foot well pad itself, 100% surface coverage of a substantial buffer zone was also completed. This buffer zone was established by the Department of Land and Natural Resources, Historic Preservation personnel and extends 1000 feet east and west of the well site and 500 feet north and south of the well site.

  13. Mesa Verde Archaeoastronomy

    NASA Astrophysics Data System (ADS)

    Munson, Gregory E.

    Mesa Verde archaeoastronomy has been studied for over 100 years through academic research. Investigators have excavated, stabilized, and documented the major dwellings in Mesa Verde National Park. Evidence for astronomical orientation and alignment was found in Cliff Palace and Sun Temple. The level of documentation increased with each new research project. With good documentation practices, together, the research has shown that the cultures of the Mesa Verde were advanced in their social organization and use of astronomy. Consultation with Native American tribal leaders will add significant background to the depth of knowledge that their ancestors possessed.

  14. Site disturbance from intensive forestry practices in East Texas 

    E-print Network

    Crawley, Walter Wayne

    1982-01-01

    disturbance by clearcut harvesting and mechanical site preparation (roller chopped or sheared and windrowed), and 2) to identify disturbance impacts on selected vegetation and surface soil character- istics. Prior to treatment, litter or humus covered 88... for the untreated watersheds were significantly higher than the site prepared watersheds, whereas sediment production was significantly lower for the untreated watersheds. There was no difference with infiltration rates and sediment production for the roller...

  15. Predevelopment Water-Level Contours for Aquifers in the Rainier Mesa and Shoshone Mountain area of the Nevada Test Site, Nye County, Nevada

    USGS Publications Warehouse

    Fenelon, Joseph M.; Laczniak, Randell J.; Halford, Keith J.

    2008-01-01

    Contaminants introduced into the subsurface of the Nevada Test Site at Rainier Mesa and Shoshone Mountain by underground nuclear testing are of concern to the U.S. Department of Energy and regulators responsible for protecting human health and safety. Although contaminants were introduced into low-permeability rocks above the regional flow system, the potential for contaminant movement away from the underground test areas and into the accessible environment is greatest by ground-water transport. The primary hydrologic control on this transport is evaluated and examined through a series of contour maps developed to represent the water-level distribution within each of the major aquifers underlying the area. Aquifers were identified and their extents delineated by merging and analyzing multiple hydrostratigraphic framework models developed by other investigators from existing geologic information. The contoured water-level distribution in each major aquifer was developed from a detailed evaluation and assessment of available water-level measurements. Multiple spreadsheets that accompany this report provide pertinent water-level and geologic data by well or drill hole. Aquifers are mapped, presented, and discussed in general terms as being one of three aquifer types?volcanic aquifer, upper carbonate aquifer, or lower carbonate aquifer. Each of these aquifer types was subdivided and mapped as independent continuous and isolated aquifers, based on the continuity of its component rock. Ground-water flow directions, as related to the transport of test-generated contaminants, were developed from water-level contours and are presented and discussed for each of the continuous aquifers. Contoured water-level altitudes vary across the study area and range from more than 5,000 feet in the volcanic aquifer beneath a recharge area in the northern part of the study area to less than 2,450 feet in the lower carbonate aquifer in the southern part of the study area. Variations in water-level altitudes within any single continuous aquifer range from a few hundred feet in a lower carbonate aquifer to just more than 1,100 feet in a volcanic aquifer. Flow directions throughout the study area are dominantly southward with minor eastward or westward deviations. Primary exceptions are westward flow in the northern part of the volcanic aquifer and eastward flow in the eastern part of the lower carbonate aquifer. Northward flow in the upper and lower carbonate aquifers in the northern part of the study area is possible but cannot be substantiated because data are lacking. Interflow between continuous aquifers is evaluated and mapped to define major flow paths. These flow paths delineate tributary flow systems, which converge to form the regional ground-water flow system. The implications of these tributary flow paths in controlling transport away from the underground test areas at Rainier Mesa and Shoshone Mountain are discussed. The obvious data gaps contributing to uncertainties in the delineation of aquifers and development of water-level contours are identified and evaluated.

  16. Argonne National Laboratory-East site environmental report for calendar year 1995

    SciTech Connect

    Golchert, N.W.; Kolzow, R.G. [Environmental Management Operation, Argonne National Lab., IL (United States)

    1996-09-01

    This report presents the environmental report for the Argonne National Laboratory-East for the year of 1995. Topics discussed include: general description of the site including climatology, geology, seismicity, hydrology, vegetation, endangered species, population, water and land use, and archaeology; compliance summary; environmental program information; environmental nonradiological program information; ground water protection; and radiological monitoring program.

  17. The MESA accelerator

    SciTech Connect

    Aulenbacher, Kurt [Institut für Kernphysik, Johannnes-Gutenberg-Universität Mainz (Germany)

    2013-11-07

    The MESA accelerator will operate for particle and nuclear physics experiments in two different modes. A first option is conventional c.w. acceleration yielding 150-200MeV spin-polarized external beam. Second, MESA will be operated as a superconducting multi-turn energy recovery linac (ERL), opening the opportunity to perform experiments with a windowless target with beam current of up to 10 mA. The perspectives for innovative experiments with such a machine are discussed together with a sketch of the accelerator physics issues that have to be solved.

  18. Shallow Firn Properties and Accumulation Rates at Sites in East Antarctica

    Microsoft Academic Search

    M. R. Albert; Z. Courville; E. M. Bell; K. Muller; H. Anschuetz; S. Tronstad

    2009-01-01

    As a dynamic, naturally-deposited porous medium, snow exhibits dramatic changes in material properties in response to changing weather conditions on both short and long time scales. At low accumulation polar sites that are too cold for snow melt, the near-surface snow and firn can remain in active contact with the atmosphere for many decades. The Norwegian-US Traverse of East Antarctica,

  19. Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse

    E-print Network

    Jacobel, Robert W.

    Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US data collected during the 2002 US International Trans-Antarctic Scientific Expedition (US locations in East Antarctica (Bintanja, 1999). Evidence of recent changes in the activity of blue-ice zones

  20. Argonne National Laboratory-East site environmental report for calendar year 1998.

    SciTech Connect

    Golchert, N.W.; Kolzow, R.G.

    1999-08-26

    This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL-E) for 1998. To evaluate the effects of ANL-E operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL-E site were analyzed and compared with applicable guidelines and standards. A variety of radionuclides were measured in air, surface water, on-site groundwater, and bottom sediment samples. In addition, chemical constituents in surface water, groundwater, and ANL-E effluent water were analyzed. External penetrating radiation doses were measured, and the potential for radiation exposure to off-site population groups was estimated. Results are interpreted in terms of the origin of the radioactive and chemical substances (i.e., natural, fallout, ANL-E, and other) and are compared with applicable environmental quality standards. A US Department of Energy dose calculation methodology, based on International Commission on Radiological Protection recommendations and the US Environmental Protection Agency's CAP-88 (Clean Air Act Assessment Package-1988) computer code, was used in preparing this report. The status of ANL-E environmental protection activities with respect to the various laws and regulations that govern waste handling and disposal is discussed, along with the progress of environmental corrective actions and restoration projects.

  1. Assessing hydraulic connections across a complex sequence of volcanic rocks-Analysis of U-20 WW multiple-well aquifer test, Pahute Mesa, Nevada National Security Site, Nevada

    USGS Publications Warehouse

    Garcia, C. Amanda; Fenelon, Joseph M.; Halford, Keith J.; Reiner, Steven R.; Laczniak, Randell J.

    2011-01-01

    Groundwater beneath Pahute Mesa flows through a complexly layered sequence of volcanic rock aquifers and confining units that have been faulted into distinct structural blocks. Hydraulic property estimates of rocks and structures in this flow system are necessary to assess radionuclide migration near underground nuclear testing areas. The U.S. Geological Survey (USGS) used a 12 month (October 1, 2008-October 1, 2009) intermittent pumping schedule of well U-20 WW and continuously monitored water levels in observation wells ER-20-6 #3, UE-20bh 1, and U-20bg as a multi-well aquifer test to evaluate hydraulic connections across structural blocks, bulk hydraulic properties of volcanic rocks, and the hydraulic significance of a major fault. Measured water levels were approximated using synthetic water levels generated from an analytical model. Synthetic water levels are a summation of environmental water-level fluctuations and a Theis (1935) transform of the pumping signal from flow rate to water-level change. Drawdown was estimated by summing residual differences between measured and synthetic water levels and the Theis-transformed pumping signal from April to September 2009. Drawdown estimates were used in a three-dimensional numerical model to estimate hydraulic properties of distinct aquifers, confining units, and a major fault. A maximum water-level drawdown of nearly 0.4 foot in well UE-20bh 1, which is more than 1 mile from the pumping well, was detected across a major fault. Drawdown estimates in the observation well nearest to (ER-20-6 #3, less than 1 mile) and within the same structural block as the pumping well were less than detection (-6 per foot, respectively, and transmissivity estimates range from 1,200 to 3,600 feet squared per day. Sensitivity analyses indicate that the major fault is hydraulically similar to the permeable host rock and connects flow between structural blocks.

  2. Argonne National Laboratory--East site environmental report for calendar year 1990

    SciTech Connect

    Golchert, N.W.; Duffy, T.L.; Moos, L.P.

    1991-07-01

    This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1990. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, bottom sediment, and milk samples. In addition, chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. The results of the surveillance program are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed. This report also discusses progress being made on environmental corrective actions and restoration projects from past activities.

  3. Argonne National Laboratory-East site environmental report for calendar year 1991

    SciTech Connect

    Golchert, N.W.; Duffy, T.L.; Moos, L.P.

    1992-05-01

    This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1991. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, and bottom sediment samples. Chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. Results are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations and the CAP-88 version of the EPA-AIRDOSE/RADRISK computer code, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed. This report also discusses progress being made on environmental corrective actions and restoration projects from past activities.

  4. Argonne National Laboratory-East site environmental report for calendar year 1993

    SciTech Connect

    Golchert, N.W.; Kolzow, R.G. [Argonne National Lab., IL (United States). Environment and Waste Management Program] [Argonne National Lab., IL (United States). Environment and Waste Management Program

    1994-05-01

    This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1993. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, and bottom sediment samples. In addition, chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. The results of the surveillance program are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations and the CAP-88 version of the EPA-AIRDOSE/RADRISK computer code, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed. This report also discusses progress being made on environmental corrective actions and restoration projects from past activities.

  5. Argonne National Laboratory-East site environmental report for calendar year 1994

    SciTech Connect

    Golchert, N.W.; Kolzow, R.G.

    1995-05-01

    This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1994. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, and bottom sediment samples. In addition, chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. The results of the surveillance program are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations and the CAP-88 version of the EPA-AIRDOSE/RADRISK COMPUTER CODE, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed. This report also discusses progress being made on environmental corrective actions and restoration projects.

  6. Argonne National Laboratory-East site environmental report for calendar year 1992

    SciTech Connect

    Golchert, N.W.; Kolzow, R.G.

    1993-05-01

    This report discusses the results of the Environmental Protection Program at Argonne National Laboratory-East (ANL) for 1992. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, and bottom sediment samples. In addition, chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. The results of the surveillance program are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations and the CAP-88 version of the EPA-AIRDOSE/RADRISK computer code, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed.

  7. Radiocarbon and thermoluminescence dating of the pottery from the early Neolithic site of Gasya (Russian Far East): initial results

    NASA Astrophysics Data System (ADS)

    Kuzmin, Yaroslav V.; Hall, Sara; S. Tite, Michael; Bailey, Richard; O'Malley, Jeanette M.; E. Medvedev, Vitaly

    2001-12-01

    Both the AMS radiocarbon technique and TL dating have been used to study the age of organic-tempered pottery from Gasya, one of the earliest Neolithic sites in the Russian Far East. The results obtained are consistent with the previous set of radiocarbon dates from the site, that were obtained for charcoal, and show that the hypothesis that the earliest pottery from the Amur River basin dates to before 10,000 BP (calendar years) is valid. The organic-tempered pottery from the Russian Far East therefore looks promising for future dating by the AMS radiocarbon and TL methods.

  8. Modeling the fate of radionuclides in the unsaturated zone at the Nevada Test Site: Examples from Yucca Flat and Rainier Mesa

    Microsoft Academic Search

    E. M. Kwicklis; Z. V. Dash; H. S. Viswanathan; D. G. Levitt; Z. Lu; Z. Dai; G. Zyvoloski; C. W. Gable; T. A. Miller

    2010-01-01

    The Nevada Test Site (NTS), located 105 km northwest of Las Vegas, Nevada, hosted 828 underground nuclear explosions between 1951 and 1992, leaving an estimated 1.3e+08 curies of tritium, fission products, activation products and unspent fuel in the subsurface when the nuclear test moratorium was adopted in September, 1992. In two former testing areas of the NTS - Yucca Flat

  9. In-Situ Air Permeability Measurements Using the Cone Permeameter at the 200 East Area of the Hanford Site

    Microsoft Academic Search

    1999-01-01

    This report documents the field demonstration of the Cone Permeameter{trademark} (CPer) conducted at the Immobilization Low-Activity Waste (ILAW) site in the 200 East area of the Department of Energy's (DOE) Hanford facility. The demonstration was conducted using the Hanford Site Cone Penetration Platform (CPP) shown in Figure 1.1. The purpose of the technology demonstration was to (1) gather baseline data

  10. Relationship between community type of wetland plants and site elevation on sandbars of the East Dongting Lake, China

    Microsoft Academic Search

    Jing-ming Zheng; Ling-yan Wang; Su-yan Li; Jin-xing Zhou; Qi-xiang Sun

    2009-01-01

    Plant communities on sandbars were important, and restoration of degraded wetland were significant to biological conservation\\u000a in the East Dongting Lake region. In this study, typical wetland community types on sandbars and their site elevation were\\u000a surveyed to explore relationship between community distribution and site elevation. Results show that eight major communities\\u000a in this region were wetland communities dominated by

  11. Redox-sensitive element uptake in north-east Atlantic Ocean sediments (Benthic Boundary Layer Experiment sites)

    Microsoft Academic Search

    J. Thomson; S. Nixon; I. W. Croudace; T. F. Pedersen; L. Brown; G. T. Cook; A. B. MacKenzie

    2001-01-01

    Regularly increasing radiocarbon age–depth profiles and near-constant sediment composition with depth have demonstrated that sediment accumulation has been relatively constant during the late Holocene at two north-east Atlantic sites on Rockall Bank and Feni Drift (UK Benthic Boundary Layer Experiment sites). In such a quasi-steady state situation, the geochemical responses to early diagenesis of the redox-sensitive elements Cd, Mn, Mo,

  12. Evaluation of Cesium, Strontium, and Lead Sorption, Desorption, and Diffusion in Cores from Western Pahute Mesa, Nevada Test Site, based on Macroscopic and Spectroscopic Investigations

    SciTech Connect

    Charalambos Papelis; Wooyong Um

    2003-03-01

    The interaction of radionuclides and other contaminants with minerals and other aquifer materials controls the rate of migration of these contaminants in groundwater. The stronger these interactions, the more a radionuclide will be retarded. Processes such as sorption and diffusion often control the migration of inorganic compounds in aquifers. These processes are often controlled by the nature of the ions of interest, the nature of the aquifer materials, and the specific geochemical conditions. Parameters describing sorption and diffusion of radionuclides and other inorganic ions on aquifer materials are used in transport codes to predict the potential for migration of these contaminants into the accessible environment. Sorption and diffusion studies can reduce the uncertainty of radionuclide transport modeling on the Nevada Test Site (NTS) and other nuclear testing areas.

  13. Observations of ambient monoterpenes at a costal site in the East Mediterranean

    NASA Astrophysics Data System (ADS)

    Tzitzikalaki, Evaggelia; Kalivitis, Nikolaos; Kouvarakis, Giorgos; Kanakidou, Maria; Mihalopoulos, Nikolaos

    2015-04-01

    Observations of ambient monoterpenes at a costal site in the East Mediterranean Biogenic Volatile Organic Compounds (BVOCs) affect the oxidizing capacity of the atmosphere since they react with hydroxyl radicals, nitrate radicals and ozone, and participate in ozone formation in the presence of sufficient amounts of nitrogen oxides. Moreover, BVOC oxidation products contribute to new particle formation and growth processes. While isoprene is emitted in the largest amount among BVOCs into the atmosphere, monoterpenes are also important for atmospheric chemistry. Tree species are responsible of the most BVOC emissions to the atmosphere but little is known about the contribution of shrub and long-range transport to the ambient BVOC concentrations. In the Mediterranean region monoterpene measurements are scarce and are limited in temporal and ecosystem coverage (forested areas). The present study presents long- term measurements of monoterpenes at a remote coastal site without tree vegetation under typical phrygana vegetation of Crete island in Greece. Measurements took place (35° 20' N, 25° 40' E, 250m a.s.l) on the north east side of the island of Crete at the Finokalia monitoring station of the University of Crete (http://finokalia.chemistry.uoc.gr). Two intensive campaigns took place, one during spring (13/03-08/04/2014) and one during summer(19/06 - 04/08/2014). During each campaign diurnal cycles were measured collecting 9 samples per day(every two hours). In addition, one diurnal cycle per week has been measured since 13/10/2014. Off-line sampling took place in adsorption tubes, using stainless steel cartridges filled with Tenax TA for one hour at 200 ml/min flow rate. Samples were stored at 40C and analyzed within two days. The samples were after desorption by a Thermal Desorber were analyzed by a GC-FID system. The most abundant monoterpenes were found to be ?3-carene and limonene.Highest concentrations were observed during autumn when a clear diurnal cycle has been seen with maximum for both ?3-carene and limonene at late afternoon. During summer, no clear diurnal variance was observed while in spring the cycle was weaker. The results are analyzed together with new particle formation observations at the Finokalia station to estimate possible links of BVOCs to the formation and growth processes of atmospheric particles in the area.

  14. Earthquake Monitoring at 9° 50'N on the East Pacific Rise RIDGE 2000 Integrated Studies Site

    NASA Astrophysics Data System (ADS)

    Tolstoy, M.; Waldhauser, F.; Kim, W.

    2004-12-01

    In the fall of 2003 nine ocean bottom seismometers (OBSs) were deployed from the R/V Keldysh within the `bull's-eye' region of the R2K ISS at 9° 49'N - 9° 51'N on the East Pacific Rise as part of the Ridge 2000 Integrated Studies Site. These instruments were recovered using the R/V Atlantis in April 2004, and twelve more were deployed to take their place for a second year of monitoring (with three years total planned). During the turn-around cruise, two short temporary deployments (~4-8 days), of an additional 3 OBSs each, were accomplished to provide very dense instrument spacing (a few 100 m) around specific vents where in situ chemical monitoring was taking place (Luther et al.). Good data were collected on seven of the nine long deployment and six short deployment OBSs. We will present early results from analysis of these data including an estimate of the level of activity observed through-out the seven month period of the first deployment, and preliminary epicenters. Data will also be shown from the short temporary deployments. Early analysis of these data indicates an event rate of ~8 events per day for events where arrivals are apparent on at least three instruments, and may therefore expect to be located. Also notable in these data are pulses and prolonged periods of what appear to be tremor. This tremor is not generally coherent or synchronous from station to station and is therefore likely a very localized phenomena associated with hydrothermal fluid flow. The exceptionally well characterized and monitored seafloor at this site will allow for unprecedented correlation of observed seismic activity with local biology, geology, geochemical and hydrothermal monitoring. In addition, past and future detailed geophysical imaging of this area will provide an excellent context for observed faulting and fracturing.

  15. 76 FR 51461 - Notice of Release From Quitclaim Deed and Federal Grant Assurance Obligations for Phoenix-Mesa...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-18

    ...comment on the application for a release of approximately 1,727 square feet of airport property at Phoenix-Mesa Gateway, Mesa...Deed and Grant Assurance obligations for approximately 1,727 square feet of airport land. The property is located on the east...

  16. The Oligocene-Miocene transition at the East Antarctic Wilkes Land margin: IODP Site 1356

    NASA Astrophysics Data System (ADS)

    Salabarnada, Ariadna; Escutia, Carlota; Nelson, Hans; Damuth, John E.; Jimenez-Espejo, Francisco

    2015-04-01

    IODP drilling in the flank of a levee deposit at continental rise Site U1356 recovered a thick section of Oligocene to upper Miocene sediments indicative of relatively deep water, sea ice -- influenced setting. Three main lithological units characterize the sediment record: 1) hemipelagic and bottom current deposition dominated during the late early to late Oligocene; 2) debris flows with interbedded turbidite deposits characterize sedimentation during late Oligocene to early Miocene; and 3) turbidite and hemipelagic sedimentation dominated during the early Miocene. The regional grid of multichannel seismic lines, provide a regional depositional context for the three units. Early to late Oligocene deposits record abyssal plain sedimentation under the influence of bottom currents. The sharp transition from abyssal plain facies to distal debris flows during the late Oligocene coincides with the deposition of large mass transport deposits at the base of the continental slope and erosion of large channels on the continental rise. The distal end of these mass transport deposits is recovered in our cores interbedded with levee turbidites from the nearby channel. The Oligocene to Miocene transition marks the disappearance of debris flows in our cores and the start of turbidite and hemipelagic deposition that characterizes levee sedimentation of the early Miocene environment. The studied section records one of the major climate transitions in the history of Earth's climate and ice sheet evolution during leading to the Mi-1 event. We argue that mass transport processes resulted from East Antarctic Ice Sheet expansion during the climate cooling leading to the Mi-1 glaciation. Following the Mi-1 event, sedimentation is characterized by hemipelagic, turbidity-, and bottom-current deposition. In addition, we present elemental and clay mineralogy data that provide insights into terrigenous fluxes, productivity, and the transition from a poorly oxygenated low-silica system to a ventilated silica-enriched system that is more similar to the modern Southern Ocean.

  17. Edge of the Mesa Alta

    USGS Multimedia Gallery

    USGS researcher Craig Allen stands on the edge of Mesa Alta, amid diverse forest and woodland in the uplands of northern New Mexico; note some recently dead ponderosa pine and Douglas-fir in the field of view. Forest drought stress is strongly correlated with tree mortality from poor growth, bark be...

  18. Microsystems & Engineering Sciences Applications (MESA)

    E-print Network

    are two packaged microresonator die next to a US dime. Exceptional ser v ice in the national interest #12 Beyond Microelectronics: Integrated Microsystems MESA continues to pioneer new technologies that have technologies are transforming microsensor research and development, a key enabler of Sandia's national security

  19. Career Education at Mesa Verde

    ERIC Educational Resources Information Center

    Triplett, Napoleon B.

    1974-01-01

    A national pilot school for career education, Mesa Verde High School, Sacramento, subscribes to the philosophy that every student will be provided an abundance of career choices at all times whether he is vocationally, technically, or academically bound. A variety of work opportunities on the campus makes the program possible. (AG)

  20. Red Sky with Red Mesa

    ScienceCinema

    None

    2014-06-23

    The Red Sky/Red Mesa supercomputing platform dramatically reduces the time required to simulate complex fuel models, from 4-6 months to just 4 weeks, allowing researchers to accelerate the pace at which they can address these complex problems. Its speed also reduces the need for laboratory and field testing, allowing for energy reduction far beyond data center walls.

  1. Red Sky with Red Mesa

    SciTech Connect

    None

    2011-04-14

    The Red Sky/Red Mesa supercomputing platform dramatically reduces the time required to simulate complex fuel models, from 4-6 months to just 4 weeks, allowing researchers to accelerate the pace at which they can address these complex problems. Its speed also reduces the need for laboratory and field testing, allowing for energy reduction far beyond data center walls.

  2. Orbital forced sea level fluctuations during the Middle Eocene (ODP site 1172, East Tasman Plateau)

    NASA Astrophysics Data System (ADS)

    Warnaar, J.; Stickley, C.; Jovane, L.; Roehl, U.; Brinkhuis, H.; Visscher, H.

    2004-12-01

    Ocean Drilling Program leg 189 was undertaken to test and refine the hypothesis (by Kennett et al., 1975), that the reconfiguration of continents around Antarctica (e.g.: the opening of the Tasmanian Gateway and Drake passage) led to the onset of the Antarctic Circumpolar Current that, in turn, would cause thermal isolation and hence cooling of Antarctica. This would possibly even cause global cooling, as suggested by the 33.3 Ma Oi1 event. The cores of leg 189, site 1172 on the eastern side of the Tasmanian Gateway provided a nearly complete succession of Eocene and Oligocene sediments. Cyclostratigraphic analysis based on XRF derived Ca and Fe records indicates distinct Milankovitch cyclicity between 40 and 36 Ma. (Röhl et al, in press). In the core-section representing magnetochron 18n-1n, the Ca record shows precession cycles in combination with obliquity, suggested to reflect sea level fluctuations (Röhl et al, in press). New datasets include microfossil data (organic-walled dinoflagellate cysts, pollen/spores and diatoms), loss-on-ignition measurements, magnetic data (environmental magnetics - ARM). Here, we aim to further investigate the proposed relationship between astronomical forcing and sea-level fluctuations. Additionally, we aim to obtain insight in the palaeoecology of the distinct endemic circum-Antarctic late Middle to Late Eocene dinoflagellate cyst assemblages. Results corroborate the concept that the cyclicity recorded by Ca and Fe measurements is the result of sea-level fluctuations. This implies that during late Middle Eocene times, astronomical forcing has modulated sea level - most likely through Antarctic ice buildup and meltdown. In turn, this would indicate the presence of significant, though probably modest, ice masses already ~40 Ma ago, well before the onset of the Antarctic Circumpolar Current. Kennett, J. P., R. E. Houtz, et al. (1975). Development of the circum-Antarctic current. Science 186: 144-147. Röhl, U.; H. Brinkhuis, C.E. Stickley, M. Fuller, S.A. Schellenberg, G. Wefer, G. Williams, Cyclostratigraphy of Middle and Late Eocene sediments from the East Tasman Plateau (site 1172), in press.

  3. Mesa Development LLC has proposed a mixed-use building to redevelop the University of Chicago-owned property at 1330 East 53rd Street. This new building, Vue53, would

    E-print Network

    Scherer, Norbert F.

    zip codes The project would add new affordable housing units on-site and off-site, equal to 20 percent is an architect's rendering. The design of the building is undergoing approval and may change. S U P P O RT ECO N O M I C G R OW T H I N H Y D E PA R K NEW JOBS NEW MARKET­RATE AND AFFORDABLE RENTAL HOUSING NEW

  4. The Impact of Harvesting and Site Preparation on Stormflow and Water Quality in East Texas 

    E-print Network

    DeHaven, M. G.; Blackburn, W. H.; Knight, R. W.; Weichert, A. T.

    1984-01-01

    In 1979, nine small forested watersheds were instrumented in East Texas to determine the effect of intensive forest management practices on water quantity and quality. Three replications of three treatments were used: 1) ...

  5. The Impact of Harvesting and Site Preparation on Stormflow and Water Quality in East Texas

    E-print Network

    DeHaven, M. G.; Blackburn, W. H.; Knight, R. W.; Weichert, A. T.

    In 1979, nine small forested watersheds were instrumented in East Texas to determine the effect of intensive forest management practices on water quantity and quality. Three replications of three treatments were used: 1) clearcutting - followed...

  6. Inversion of Gravity Data to Define the Pre-Cenozoic Surface and Regional Structures Possibly Influencing Groundwater Flow in the Rainier Mesa Region, Nye County, Nevada

    USGS Publications Warehouse

    Hildenbrand, Thomas G.; Phelps, Geoffrey A.; Mankinen, Edward A.

    2006-01-01

    A three-dimensional inversion of gravity data from the Rainier Mesa area and surrounding regions reveals a topographically complex pre-Cenozoic basement surface. This model of the depth to pre-Cenozoic basement rocks is intended for use in a 3D hydrogeologic model being constructed for the Rainier Mesa area. Prior to this study, our knowledge of the depth to pre-Cenozoic basement rocks was based on a regional model, applicable to general studies of the greater Nevada Test Site area but inappropriate for higher resolution modeling of ground-water flow across the Rainier Mesa area. The new model incorporates several changes that lead to significant improvements over the previous regional view. First, the addition of constraining wells, encountering old volcanic rocks lying above but near pre-Cenozoic basement, prevents modeled basement from being too shallow. Second, an extensive literature and well data search has led to an increased understanding of the change of rock density with depth in the vicinity of Rainier Mesa. The third, and most important change, relates to the application of several depth-density relationships in the study area instead of a single generalized relationship, thereby improving the overall model fit. In general, the pre-Cenozoic basement surface deepens in the western part of the study area, delineating collapses within the Silent Canyon and Timber Mountain caldera complexes, and shallows in the east in the Eleana Range and Yucca Flat regions, where basement crops out. In the Rainier Mesa study area, basement is generally shallow (< 1 km). The new model identifies previously unrecognized structures within the pre-Cenozoic basement that may influence ground-water flow, such as a shallow basement ridge related to an inferred fault extending northward from Rainier Mesa into Kawich Valley.

  7. Determination of leaf area index of loblolly pine (Pinus taeda L.) and its relationship to site water balance across a large precipitation gradient in East Texas 

    E-print Network

    Hebert, Mark Thomas

    1996-01-01

    The relationship between leaf area index (LAI) and site water balance (SWB) in closed canopy lobiolly pine plantations was analyzed across a natural 50-cm precipitation gradient in East Texas. Six precipitation zones were delineated based upon...

  8. Seasonal changes in abundances of waterbirds at Sabaki River Mouth (Malindi, Kenya), a key stopover site on the West Asian–East African Flyway

    Microsoft Academic Search

    Simon Valle; Luigi Boitani

    2012-01-01

    Information on seasonal changes in waterbird numbers in coastal East Africa is limited, but crucial for estimating global flyway populations and targeting conservation efforts. The Sabaki River Mouth is an important site for waterbirds in the region. We counted waterbirds at the site monthly from April 2004 to February 2005. Our counts confirmed the importance of the site for the

  9. Fly over of Mars Mesa, Tounge, Dunes, Sasquatch Crater

    NSDL National Science Digital Library

    NASA/Goddard Space Flight Center Scientific Visualization Studio

    This site from NASA's Scientific Visualization Studio features fly overs of Mesa, Tounge, Dunes, and Sasquatch Crater. Data for topography is based on the Mars Orbiting Laser Altimeter (MOLA) with Viking data used for color. Vertical exaggeration is about 300 times.

  10. YUCCA MOUNTAIN SITE CHARACTERIZATION PROJECT EAST-WEST DRIFT SYSTEM SAFETY ANALYSIS

    SciTech Connect

    NA

    1999-06-08

    The purpose of this analysis is to systematically identify and evaluate hazards related to the design of the Yucca Mountain Project Exploratory Studies Facility (ESF) East-West Cross Drift. This analysis builds upon prior ESF System Safety Analyses and incorporates TS Main Drift scenarios, where applicable, into the East-West Drift scenarios. This System Safety Analysis (SSA) focuses on the personnel safety and health hazards associated with the engineered design of the East-West Drift. The analysis also evaluates other aspects of the East-West Drift, including purchased equipment (e.g., scientific mapping platform) or Systems/Structures/Components (SSCs) and out-of-tolerance conditions. In addition to recommending design mitigation features, the analysis identifies the potential need for procedures, training, or Job Safety Analyses (JSAs). The inclusion of this information in the SSA is intended to assist the organization(s) (e.g., constructor, Safety and Health, design) responsible for these aspects of the East-West Drift in evaluating personnel hazards and augment the information developed by these organizations. The SSA is an integral part of the systems engineering process, whereby safety is considered during planning, design, testing, and construction. A largely qualitative approach is used which incorporates operating experiences and recommendations from vendors, the constructor and the operating contractor. The risk assessment in this analysis characterizes the scenarios associated with East-West Drift SSCs in terms of relative risk and includes recommendations for mitigating all identified hazards. The priority for recommending and implementing mitigation control features is: (1) Incorporate measures to reduce risks and hazards into SSC designs. (2) Add safety features and capabilities to existing designs. (3) Develop procedures and conduct training to increase worker awareness of potential hazards, reduce exposure to hazards, and inform personnel of the actions required to avoid accidents or correct hazardous conditions. This analysis does not consider temporary construction items and, therefore, does not consider hazards associated with temporary construction items. This analysis will be reviewed and updated to reflect new East-West Drift design changes, construction modifications, and ''as built'' documentation of the East-West Drift when completed. A major difference between this analysis and previous ESF SSAs is the inclusion of hazards that arise as a result of non-accident events, (e.g., ''off-normal'' operations, adverse environmental conditions, or ''out-of-tolerance'' conditions). Non-accident events, that were not included in previous ESF SSAs, include environmental and/or toxic hazards such as leaking gases/fluids, off-gassing reactions, and excessive dust, particulates, exhaust fumes, noise, temperature, etc. which could have an adverse health effect on personnel.

  11. Revised Hydrogeology for the Suprabasalt Aquifer System, 200-East Area and Vicinity, Hanford Site, Washington

    SciTech Connect

    Williams, Bruce A.; Bjornstad, Bruce N.; Schalla, Ronald; Webber, William D.

    2000-04-20

    This study supports the Hanford Groundwater/Vadose integration project objectives to better understand the risk of groundwater contamination and potential risk to the public via groundwater flow paths. The primary objective of this study was to refine the conceptual groundwater flow model for the 200-East Area and vicinity.

  12. Antarctic environmental variability since the late Miocene: ODP Site 745, the East Kerguelen sediment drift

    E-print Network

    the middle of the Pliocene warm epoch (4.8^3.2 Ma). The deep flow forming the Kerguelen drift was stronger in revised form 1 April 2002; accepted 10 April 2002 Abstract Characterization of sediment from Ocean surrounding the timing of Miocene to present East Antarctic ice sheet stability and oceanic environmental

  13. Evaluation of erosion and cover re-establishment following site preparation on east Texas forest lands 

    E-print Network

    Blume, Timothy Allen

    1979-01-01

    -establishment of soil protective cover following two methods of mechanical site prepa- ration treatments: (1) shearing, roller-chopping and planting and (2) shearing, piling, burning the windrows and planting. The sites chosen for study varied by time since site... in grass was significantly iv higher on the sheared and piled sites compared to the sheared and roller-chopped sites over the first three years of the study. Moody vegetative cover increased throughout the treatment period after both treatments...

  14. BA in MIDDLE EAST STUDIES / ARABIC (570141) MAP Sheet International and Area Studies Programs

    E-print Network

    Olsen Jr., Dan R.

    BA in MIDDLE EAST STUDIES / ARABIC (570141) MAP Sheet International and Area Studies Programs language experience.) MESA 201 Introduction to Middle East Studies MESA 250 Introduction to Religion-Year Arabic Arab 202* Intermediate Arabic Geog 271* Middle East IHum 242* Intro to Humanities of Islamic World

  15. Storm Flow and Sediment Losses From Site-Prepared Forestland in East Texas

    NASA Astrophysics Data System (ADS)

    Blackburn, W. H.; Wood, J. C.; Dehaven, M. G.

    1986-05-01

    Nine small (2.57 to 2.79 ha) forested watersheds in East Texas were instrumented in December 1979 to determine the effect of harvesting and site preparation on storm flow and sediment loss. Three replications of three treatments were used: (1) clearcutting, followed by shearing, windrowing, and burning, (2) clearcutting, followed by roller chopping and burning, and (3) undisturbed control. Prior to treatment, mineral soil was exposed on 3% of the watersheds. Following treatment in June 1981, 57% of the mineral soil was exposed on the sheared and windrowed watersheds compared to 16% on the chopped watersheds. At the end of the second, third, and fourth years' growing season, mineral soil was exposed on 20, 9, and 10% of the sheared and 4, 4, and 3% of the chopped watersheds, respectively. The first year following treatment, mean storm flow was greater from the sheared watersheds (14.6 cm) than from the chopped (8.3 cm) watersheds, with the storm flow from the latter greater than from the undisturbed (2.6 cm) watersheds. Mean storm flow was less from all watersheds the second year after treatment; however, storm flow from the sheared watersheds (5.0 cm) was similar to that from the chopped (3.6 cm) water-sheds, and both were greater than that from the undisturbed (1.2 cm) watersheds. During the third posttreatment year there was no significant difference in mean storm flow from the sheared and chopped watersheds or from chopped and undisturbed watersheds. Storm flow during the fourth posttreatment year was greater from the sheared watersheds (6.1 cm) than from the chopped (3.5 cm) watersheds, which had greater stormflow than the undisturbed (1.4 cm) watersheds. First-year sediment losses were greater from the sheared (2937 kg/ha) than from the chopped (25 kg/ha) or undisturbed (33 kg/ha) watersheds. Although second-year sediment losses were greatly reduced from the sheared watersheds (79.9 kg/ha), they remained greater than losses from chopped (5.5 kg/ha) or undisturbed (5.1 kg/ha) watersheds. Sediment losses from the sheared watersheds (34.6 kg/ha) decreased during the third posttreatment year and were similar to losses from the chopped (5.4 kg/ha) watersheds. During the fourth posttreatment year, sediment loss was greater from the sheared watersheds (165 kg/ha) than from the chopped (16 kg^sol;ha) or the undisturbed (29 kg/ha) watersheds. Although sediment losses were significantly different between treatment,, they were small and below Soil Conservation Service tolerable levels. Mean sediment concentrations and losses from the chopped and undisturbed watersheds were similar during the four posttreatment years. Sediment concentrations from the sheared watersheds, were greater than from chopped or pndisturbed watersheds during the four posttreatment years; however, concentrations the first year after treatment (2119 mg/L) were greatly reduced the second (167 mg/L), third (54 mg/L), and fourth year (331 mg/L).

  16. Prediction of Pseudo relative velocity response spectra at Yucca Mountain for underground nuclear explosions conducted in the Pahute Mesa testing area at the Nevada testing site; Yucca Mountain Site Characterization Project

    SciTech Connect

    Phillips, J.S.

    1991-12-01

    The Yucca Mountain Site Characterization Project (YMP), managed by the Office of Geologic Disposal of the Office of Civilian Radioactive Waste Management of the US Department of Energy, is examining the feasibility of siting a repository for commercial, high-level nuclear wastes at Yucca Mountain on and adjacent to the Nevada Test Site (NTS). This work, intended to extend our understanding of the ground motion at Yucca Mountain resulting from testing of nuclear weapons on the NTS, was funded by the Yucca Mountain project and the Military Applications Weapons Test Program. This report summarizes one aspect of the weapons test seismic investigations conducted in FY88. Pseudo relative velocity response spectra (PSRV) have been calculated for a large body of surface ground motions generated by underground nuclear explosions. These spectra have been analyzed and fit using multiple linear regression techniques to develop a credible prediction technique for surface PSRVs. In addition, a technique for estimating downhole PSRVs at specific stations is included. A data summary, data analysis, prediction development, prediction evaluation, software summary and FORTRAN listing of the prediction technique are included in this report.

  17. ARNOLD MESA ROADLESS AREA, ARIZONA.

    USGS Publications Warehouse

    Wolfe, Edward W.; McColly, Robert A.

    1984-01-01

    Geologic geochemical, and aeromagnetic investigations and a survey of mines and prospects in the Arnold Mesa Roadless Area, Arizona, provide little evidence for the occurrence of mineral or energy resources. Buried Proterozoic basement rocks are possible hosts of porphyry-type copper and massive sulfide deposits but the thick cover of Paleozoic sedimentary rocks and upper Cenozoic volcanic rocks precluded assessment of this possibility. Chemistry and temperature of spring and well waters suggest that a geothermal resource may exist near the eastern margin of the roadless area, but the anomaly has not been tested by drilling and this resource remains unverified. No other energy resources were identified.

  18. Lights, camera and acoustics: Assessing macrobenthic communities at a dredged material disposal site off the North East coast of the UK

    Microsoft Academic Search

    Silvana N. R. Birchenough; Siân E. Boyd; Roger A. Coggan; David S. Limpenny; William J. Meadows; Hubert L. Rees

    2006-01-01

    This study presents the results of a trial assessment based on a combination of sampling techniques at a dredged material disposal site located off the North East coast of the UK, over 2001 to 2004. The site was surveyed with a high-resolution sidescan sonar system producing a mosaic with 100% coverage of the survey area. Benthic communities and sediments were

  19. Offsite Construction Comparative Study of Panelized and Modular Construction for Rio Mesa Facilities

    E-print Network

    Tipple, Brett

    Offsite Construction Comparative Study of Panelized and Modular Construction: This research is to evaluate the opportunities of prefabricated construction for remote the logistics of prefab construction on the Rio Mesa site, we hope that this project

  20. Mars EVA Suit Airlock (MESA)

    NASA Astrophysics Data System (ADS)

    Ransom, Stephen; Böttcher, Jörg; Steinsiek, Frank

    The Astrium Space Infrastructure Division has begun an in-house research activity of an Earth-based simulation facility supporting future manned missions to Mars. This research unit will help to prepare and support planned missions in the following ways: 1) to enable the investigation and analysis of contamination issues in advance of a human visit to Mars; 2) as a design tool to investigate and simulate crew operations; 3) to simulate crew operation during an actual mission; 4) to enable on-surface scientific operations without leaving the shirt-sleeve habitation environment ("glove box principle"). The MESA module is a surface EVA facility attached to the main habitation or laboratory module, or mobile pressurized rover. It will be sealed, but not pressurized, and provide protection against the harsh Martian environment. This module will include a second crew airlock for safety reasons. The compartment can also be used to provide an external working bench and experiment area for the crew. A simpler MESA concept provides only an open shelter against wind and dust. This concept does not incorporate working and experimental areas. The principle idea behind the MESA concept is to tackle the issue of contamination by minimizing the decontamination processes needed to clean surface equipment and crew suit surfaces after an EVA excursion prior to the astronaut re-entering the habitable area. The technical solution envisages the use of a dedicated crew suit airlock. This airlock uses an EVA suit which is externally attached by its back-pack to the EVA compartment area facing the Martian environment. The crew donns the suit from inside the habitable volume through the airlock on the back of the suit. The surface EVA can be accomplished after closing the back-pack and detaching the suit. A special technical design concept foresees an extendable suit back-pack, so that the astronaut can operate outside and in the vincinity of the module. The key driver in the investigation is the problem of contamination of the habitable volume by EVA and sampling activities and the transport of Earth-generated contaminants to Mars.

  1. In-Situ Air Permeability Measurements Using the Cone Permeameter at the 200 East Area of the Hanford Site

    SciTech Connect

    TROYER, G.L.

    1999-03-31

    This report documents the field demonstration of the Cone Permeameter{trademark} (CPer) conducted at the Immobilization Low-Activity Waste (ILAW) site in the 200 East area of the Department of Energy's (DOE) Hanford facility. The demonstration was conducted using the Hanford Site Cone Penetration Platform (CPP) shown in Figure 1.1. The purpose of the technology demonstration was to (1) gather baseline data and evaluate the CPer's ability to measure air permeability in arid sands, silts and gravels; and (2) to determine the system's ability to replicate permeability profiles with multiple pushes in close proximity. The demonstration was jointly conducted by Applied Research Associates, Inc. (ARA) and Science and Engineering Associates (SEA). This report satisfies the requirements of ARA's contract No.2075 to Lockheed Martin Hanford Company. The report is organized into six major sections. This first section presents an introduction and outline to the report. Section 2 contains a discussion of the technologies used for the demonstration. Section 3 contains a brief description of the site where the demonstration was conducted. Section 4 describes the testing methodology and chronology. Section 5 presents the results obtained during the field test program. Comparisons between these results and existing site data are developed and discussed in Section 5. A conclusion and recommendation section is presented in Section 6 of the report.

  2. Wet Deposition of Black Carbon at a Remote Site in the East China Sea

    NASA Astrophysics Data System (ADS)

    Mori, T.; Kondo, Y.; Moteki, N.; Ohata, S.; Matsui, H.; Oshima, N.; Iwasaki, A.

    2014-12-01

    Black carbon (BC) is produced by incomplete combustion of fossil fuels and biomass, and removed by wet deposition. Long-term measurements of BC wet deposition are very important to understand BC loss because wet deposition is major sink of BC. We measured BC mass concentrations in air (MBC) and in rainwater (CBC) simultaneously at Cape Hedo on Okinawa Island, Japan, in the East China Sea, from April 2010 to March 2013. MBC was measured by a Continuous Soot Monitoring System (COSMOS) and CBC was measured by a combination of an ultrasonic nebulizer and a Single-Particle Soot Photometer (SP2). The monthly averaged MBC, CBC, and BC wet deposition flux (FBC) showed marked seasonal variations, being highest in spring. The FBC during the four spring seasons (51 mg m-2 (3month)-1) was about 77% of the annual average of FBC (65.5 mg m-2 yr-1). This flux is comparable to the average BC net flux (emission - deposition) over North China, indicating the importance of precipitation amount over the East China Sea as a sink of BC transported from North China. In summer, CBC values were correlated with MBC (r2 = 0.47) for rain events associated with local convective activity, as identified by the convective available potential energy (CAPE). A-one dimensional thermodynamic model successfully explained the relation between MBC and CBC.

  3. In: Ivan Gatsov and Yavor Boyadzhiev (eds.) 2009 The First Neolithic Sites in Central/South-East European Transect Volume I: Early Neolithic Sites on the Territory of Bulgaria. BAR International S2048, pp.5962.

    E-print Network

    Marinova, Elena

    In: Ivan Gatsov and Yavor Boyadzhiev (eds.) 2009 The First Neolithic Sites in Central/South-East European Transect Volume I: Early Neolithic Sites on the Territory of Bulgaria. BAR International S2048, pp.59­62. PLANT ECONOMY AND VEGETATION DURING THE EARLY NEOLITHIC OF BULGARIA Elena Marinova Katholieke

  4. Addendum to the East Tennessee Technology Park Site-Wide Residual Contamination Remedial Investigation Work Plan Oak Ridge, Tennessee

    SciTech Connect

    SAIC

    2011-04-01

    The East Tennessee Technology Park Site-Wide Residual Contamination Remedial Investigation Work Plan (DOE 2004) describes the planned fieldwork to support the remedial investigation (RI) for residual contamination at the East Tennessee Technology Park (ETTP) not addressed in previous Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) decisions. This Addendum describes activities that will be conducted to gather additional information in Zone 1 of the ETTP for groundwater, surface water, and sediments. This Addendum has been developed from agreements reached in meetings held on June 23, 2010, August 25, 2010, October 13, 2010, November 13, 2010, December 1, 2010, and January 13, 2011, with representatives of the U. S. Department of Energy (DOE), U. S. Environmental Protection Agency (EPA), and Tennessee Department of Environment and Conservation (TDEC). Based on historical to recent groundwater data for ETTP and the previously completed Sitewide Remedial Investigation for the ETTP (DOE 2007a), the following six areas of concern have been identified that exhibit groundwater contamination downgradient of these areas above state of Tennessee and EPA drinking water maximum contaminant levels (MCLs): (1) K-720 Fly Ash Pile, (2) K-770 Scrap Yard, (3) Duct Island, (4) K-1085 Firehouse Burn/J.A. Jones Maintenance Area, (5) Contractor's Spoil Area (CSA), and (6) Former K-1070-A Burial Ground. The paper presents a brief summary of the history of the areas, the general conceptual models for the observed groundwater contamination, and the data gaps identified.

  5. Wet deposition of black carbon at a remote site in the East China Sea

    NASA Astrophysics Data System (ADS)

    Mori, T.; Kondo, Y.; Ohata, S.; Moteki, N.; Matsui, H.; Oshima, N.; Iwasaki, A.

    2014-09-01

    Mass concentrations of black carbon (BC) in air (MBC) and rainwater (CBC) in the East China Sea were measured at Hedo on Okinawa Island, Japan, from April 2010 to March 2013. The monthly averaged MBC and CBC showed marked seasonal variations, being highest in spring (0.32 ± 0.13 µg m-3 and 92 ± 76 µg L-1, respectively) and lowest in summer (0.06 ± 0.03 µg m-3 and 8.0 ± 4.1 µg L-1, respectively). The high MBC and CBC in spring were associated with transport of air masses from the Asian continent by northwesterly winds. The BC wet deposition flux (FBC), estimated as the product of CBC and precipitation amount, also showed a distinct seasonal variation. The monthly average FBC during the four spring seasons (16.8 ± 6.7 mg m-2 month-1) was about 3 times higher than the annual average FBC (5.5 ± 9.9 mg m-2 month-1) owing to the high CBC and precipitation amount in spring. As a result, about 76% of the annual BC deposition occurred in spring on average. The FBC in spring is comparable to the average BC net flux in North China, indicating the importance of precipitation over the East China Sea as a sink of BC transported from North China. In summer, CBC values were correlated with MBC for rain events associated with local convective activity, as identified by the convective available potential energy. A one-dimensional thermodynamic model successfully explained the relation between CBC and MBC.

  6. Modelling soil moisture for a grassland and a woodland site in south-east England Hydrology and Earth System Sciences, 6(1), 3947 (2002) EGS

    E-print Network

    Paris-Sud XI, Université de

    2002-01-01

    and Earth System Sciences, 6(1), 39­47 (2002) © EGS Modelling soil moisture for a grassland and a woodlandModelling soil moisture for a grassland and a woodland site in south-east England 39 Hydrology, OX10 8BB, UK Email: Emb@ceh.ac.uk Abstract This paper describes a comparison between two soil

  7. Revised Livermore seismic hazard estimates for sixty-nine nuclear power plant sites east of the Rocky Mountains. Final report, July 1993March 1994

    Microsoft Academic Search

    Sobel

    1994-01-01

    The draft version of this report presented updated Lawrence Livermore National Laboratory (LLNL) probabilistic seismic hazard analysis estimates for 69 nuclear power plant sites in the region of the United States east of the Rocky Mountains. LLNL performed a re-elicitation of seismicity and ground motion experts to improve their estimates of uncertainty in seismicity parameters and ground motion models. Using

  8. Seasonal variations of black carbon in rainwater at a remote site in the East China Sea

    NASA Astrophysics Data System (ADS)

    Mori, T.; Kondo, Y.; Moteki, N.; Ohata, S.; Iwasaki, A.

    2013-12-01

    Black carbon (BC) particles are emitted into the atmosphere by incomplete combustion of fossil fuels and biomass, and removed by wet deposition. Because wet deposition is the major sink of BC, systematic measurements of wet deposition of BC are critical for quantitative understanding loss of BC. We measured BC mass concentration in the air (Mair) and in rainwater (Mrain) simultaneously at Cape Hedo on Okinawa Island, Japan, in the East China Sea, from April 2010 to March 2013. An automated wet-only sampler was used to collect rainwater during a 24 period. Mair was measured by a Continuous Soot Monitoring System (COSMOS) and Mrain was measured by a system consisting of an ultrasonic nebulizer and a Single Soot Photometer (SP2). The monthly averaged Mair and Mrain showed marked seasonal variations: Mair and Mrain were highest in spring (0.32×0.13 ?g m-3 and 92×76 ?g L-1, respectively), and lowest in summer (0.06×0.03 ?g m-3 and 8.0×4.1?g L-1, respectively). The BC deposition flux FBC, defined as the product of Mrain and amount of precipitation, also showed a distinct seasonal variation. The average FBC in spring was about 77% of the annual average FBC, which was 65.5 mg m-2 year-1. The highest FBC in spring was due to the high Mrain and precipitation amount. In turn, the high Mrain was caused by the Mair values in spring associated with frequent transport of high BC air masses from China by north-westerly wind in this season. The BC scavenging ratio, defined as the Mrain/Mair ratio, was highly variable throughout the year: the ratio in spring was about 6 times higher than in fall.

  9. Determination of leaf area index of loblolly pine (Pinus taeda L.) and its relationship to site water balance across a large precipitation gradient in East Texas

    E-print Network

    Hebert, Mark Thomas

    1996-01-01

    DETERMINATION OF LEAF AREA INDEX OF LOBLOLLY PINE (Pinus taeda L. ) AND ITS RELATIONSHIP TO SITE WATER BALANCE ACROSS A LARGE PRECIPITATION GRADIENT IN EAST TEXAS A Thesis by MARK THOMAS HEBERT Submitted to the Office of Graduate Studies... of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1996 Major Subject: Forest Science DETERMINATION OF LEAF AREA INDEX OF LOBLOLLY PINE (Pinus taeda L. ) AND ITS RELATIONSHIP TO SITE WATER...

  10. Deriving a speciated atmospheric nitrogen budget at Auchencorth Moss, a background site in South East Scotland

    NASA Astrophysics Data System (ADS)

    Twigg, Marsailidh; Aruffo, Eleonora; Kentisbeer, John; Malley, Christopher; Leeson, Sarah; Jones, Matthew; Nemitz, Eiko; Di Carlo, Piero; Braban, Christine

    2015-04-01

    Since 2006, the EMEP supersite, Auchencorth Moss, has routinely measured HNO3, HONO, NO, NO2, NH3 and speciated aerosols including NH4+ and NO3- in PM2.5 and PM10. It is known that other reactive N species are important in the atmosphere at background sites including PANs, peroxy nitrates, alkyl nitrates, ClNO2 and N2O5 and routine measurements are not frequently assessed against these other species. The following study presents the highlights from an intensive study, in spring 2014, where non-routine measurements (TD-LIF and PAN GC) were carried out alongside routine measurements (MARGA, ANNOx, NOxThermoFisher Analyser). The objectives of the study were to understand further the role of non-routine measured species in the N budget at this site and to try to identify potential artefacts in current routine measurements. Initial comparison studies suggest that routine measurements capture well the temporal variations in NOx and HNO3, though questions remain on the accuracy of the measurements. During the study on average low concentrations of all species (NO2 = 1.58 ppb, NH3 = 2.3 ppb, HNO3 = 0.09 ppb, HONO= 0.07 ppb) were observed, though there were periods where polluted air masses arrived at the site resulting in an increase in both routine and non-routine measured species. As well as air masses transporting N species, there was evidence of atmospheric chemical transformations of N species at the site, including the photochemical production of PAN.

  11. A geophysical-geological transect of the Silent Canyon caldera complex, Pahute Mesa, Nevada

    SciTech Connect

    Ferguson, J.F. [Univ. of Texas at Dallas, Richardson, TX (United States)] [Univ. of Texas at Dallas, Richardson, TX (United States); Cogbill, A.H.; Warren, R.G. [Los Alamos National Lab., NM (United States)] [Los Alamos National Lab., NM (United States)

    1994-03-10

    Revision of lithological logs for boreholes penetrating the volcanic center at Pahute Mesa, Neveda, has led to a thorough review of the volcanic stratigraphy and geologic structure. The authors have combined this review with a compilation of old and newly acquired gravity and seismic travel time data, producing a unified interpretation along a northwest to southeast profile. The analysis supports a new interpretation of the Silent Canyon caldera complex. The caldera is found to be more asymmetric than previously suggested, with the southeastern boundary formed by linear, high-angle normal faults and a more gently sloping northwestern boundary. The total thickness of volcanic units within the caldera complex does not appear to exceed 5 km. The shallow structure at Pahute Mesa could have a profound effect on the seismic response for regional and teleseismic signals from this nuclear test site. The Silent Canyon caldera complex is actually a set of nested calderas first filled by thick (>1 km) postcaldera lavas and subsequently buried by outflow sheets of the Timber Mountain caldera to the south. Thick, postcaldera lavas filled a half-graben structure formed west of the West Greeley fault, dropping the tops of the youngest caldera-forming units to depths in excess of 2 km. Therefore the western boundary of the caldera complex is poorly defined. East of the West Greeley fault, two overlapping calderas are defined, and stratigraphic data suggest the presence of even older calderas. The youngest caldera, the calc-alkaline Area 20 caldera, is well defined from drill hole data. The Area 20 caldera overlaps the 13.6 Ma peralkaline Grouse Canyon caldera, which is less well defined, but apparently collapsed in trap-door style along the Almendro fault. For both these calderas, collapse continued after the main caldera-forming eruption, concurrent with the accumulation of thick (>1 km) lavas within the peripheral collapse zones. 67 refs., 13 figs.

  12. SONOMA&STATE&UNIVERSITY& MESA&ENGINEERING&PROGRAM&

    E-print Network

    Ravikumar, B.

    &and&Advising& · SSU&MESA&Scholarship&& · MESA&PG&E&Scholarships&& · Career&opportunities& WHO&SHOULD&APPLY?& MESA(or(intended(majors/minors:( · Biochemistry& · Biology& · Chemistry& · Computer&Science& · Electrical&Engineering& · Geology& · Mathematics

  13. Injector linac for the MESA facility

    SciTech Connect

    Heine, R. [Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz (Germany)

    2013-11-07

    In this paper we present several possible configurations of an injector linac for the upcoming Mainz Energy-recovering Superconducting Accelerator (MESA) [1] and discuss their suitability for the project.

  14. Fiscal years 1993 and 1994 decontamination and decommissioning activities photobriefing book for the Argonne National Laboratory-East Site, Technology Development Division, Decontamination and Decommissioning Projects Department

    SciTech Connect

    NONE

    1995-12-31

    This photobriefing book describes the ongoing decontamination and decommissioning projects at the Argonne National Laboratory (ANL)-East Site near Lemont, Illinois. The book is broken down into three sections: introduction, project descriptions, and summary. The introduction elates the history and mission of the Decontamination and Decommissioning (D and D) Projects Department at ANL-East. The second section describes the active ANL-East D and D projects, giving a project history and detailing fiscal year (FY) 1993 and FY 1994 accomplishments and FY 1995 goals. The final section summarizes the goals of the D and D Projects Department and the current program status. The D/D projects include the Experimental Boiling Water Reactor, Chicago Pile-5 Reactor, that cells, and plutonium gloveboxes. 73 figs.

  15. Chemical composition and mass size distribution of PM1.0 at an elevated site in central east China

    NASA Astrophysics Data System (ADS)

    Zhang, Y. M.; Zhang, X. Y.; Sun, J. Y.; Hu, G. Y.; Shen, X. J.; Wang, Y. Q.; Wang, T. T.; Wang, D. Z.; Zhao, Y.

    2014-06-01

    Size-resolved aerosol chemical compositions were measured continuously for one and half years with an aerosol mass spectrometer (AMS) to characterize the mass and size distributions (MSDs) of each component in bulk, fresh and aged submicron particles (approximately PM1.0) at Mountain Tai, an elevated site in Central East China (CEC) from June 2010 to January 2012. The majority of the regionally-dispersed aerosols were found to be contributed from short distance mixed aerosol, mostly from its south with organics and sulfate as the major components. The annual mean mass concentrations of organics, sulfate, nitrate, ammonium and chloride were 11.2, 9.2, 7.2, 5.8 and 0.95 ?g m-3, respectively, which are much lower for organics and sulfate, and slightly lower for nitrate, ammonium and chloride than those at the nearby surface rural sites. High organics were observed for all four seasons, and the relatively fresh organic aerosol (OA) containing high proportion of less-photo chemically OA, were found from long-range transported aerosol from northwest. Semi-volatile and low-volatile oxidized OAs together contributed approximately 49%, 55% in spring and 72% and 51% in winter of total OA, showing at least 50% of OA can be attributable to SOA. Seasonally, the chemical components at the elevated site showed a "winter high and autumn low" pattern, with organics, sulfate and ammonium peaking in summer. Though no obvious differences of MSDs were seen for various chemical components in the planetary boundary layer (PBL) and free troposphere (FT), the concentrations were a factor of 5-7 higher in PBL than in FT. The averaged MSDs of particles between 30-1000 nm for organics, sulfate, nitrate, and ammonium are approximately log-normal with similar mass median diameters (MMDs) of 539, 585, 542, and 545 nm, respectively, which were slightly larger than those in ground sites within North China Plain (NCP). Obvious differences in MMDs were found between fresh and aged aerosols for sulfate and ammonium, with smaller increased size-factors for the Mt. Tai aerosols than those in less polluted areas. All these exhibit the relative aged and well-mixed aerosol observed.

  16. Argonne National Laboratory-East summary site environmental report for calendar year 2001.

    SciTech Connect

    Golchert, N. W.; Kolzow, R. G.

    2003-02-20

    This report is a summary of the actions taken by Argonne National Laboratory in 2001 to keep the public and environment safe. Over the last year, Argonne has monitored, evaluated, and taken steps to control problems or potential problems on its DuPage County site. The problems that have or might occur are things like spilled or leaked radiological waste, non-radiological wastes or hazardous materials. Argonne is keeping its promise to be a good neighbor, and this report confirms its commitment to its neighbors, both human and environmental. Argonne's commitment to have minimal effect on the environment was tested vigorously over 2001. Argonne's first priority is keeping the people around it safe. This was verified through tests done on the air. The air can be the most damaging way to pollute an area. This is why Argonne was so extensive in its testing. They followed guidelines of the Clean Air Act, which covers radioactive emissions, asbestos, and conventional air pollutants. Air was tested, and after all calculations were finished, the effect on the public was found to be so minimal that it almost didn't register. The sources of pollutants from Argonne are exhausts from laboratories and other facilities, the steam plant that provides space heating for Argonne's buildings, and emissions from emergency generators when they are operating. The traces that were found were evaluated and reduced, even though they were originally well within regulatory limits. The same trends--further reduction of concentrations that were already safe--were found in the water analysis, as well. Water was sampled and evaluated many times over the course of the year, and what was found was good news. The radiological elements were very minimal, and most of the trace amounts were due to naturally occurring radiological sources. The only measurements that exceeded standards a few times were of total dissolved solids (TDS), essentially road salts dissolved in rainwater runoff. These problems were detected and then controlled. To put numbers to the situation, 1,600 measurements were taken over the last year, and out those measurements, only seven were outside the limits set by the Illinois Environmental Protection Agency. Argonne has another priority as well: keeping the environment around its site safe. The ecosystem surrounding Argonne, including Waterfall Glen Forest Preserve, is a valuable resource for our area. Argonne knows the value of this ecosystem and works in every way possible to keep it free of pollutants, both radiological and non-radiological. Many of the factors involved in keeping the public healthy also keep our forest and its inhabitants healthy. Argonne is not always told to keep environmental contaminants at a specific level, but the laboratory works at it anyway and often sets its own standards stricter than national and state standards. Argonne has a commitment, and that commitment leads the laboratory to be a better neighbor. Argonne is a valuable resource for the community, working to keep the public and the ecosystem safe and healthy.

  17. Overview from bluff east of facility. Note buildings #35 (left). ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Overview from bluff east of facility. Note buildings #35 (left). #33 (center), and #31 A (right) VIEW WEST - Department of Energy, Grand Junction Office, 2597 B3/4 Road, Grand Junction, Mesa County, CO

  18. Reduction of leakage currents in silicon mesa devices

    Microsoft Academic Search

    R. D. Kuhne; E. Kasper

    1998-01-01

    Easily and rapidly manufacturable silicon mesa devices suffer from additional leakage currents from the mesa rim where n-p junctions are exposed to the surface. A modified mesa structure is proposed, which reduces the drawbacks of leakage currents. The structure contains a metallization smaller than the mesa and a very thin (10-nm) contact layer as, for instance, can be grown by

  19. Service Integration in Colorado: Connecting Programs To Provide Better Services in Mesa and El Paso Counties.

    ERIC Educational Resources Information Center

    Ragan, Mark

    Efforts to integrate the delivery of human service programs (HSP) in Colorado's El Paso County and Mesa County were examined through site visits and meetings with 34 members of HSP staff in both counties. The site visits confirmed that staff and management of HSP in both counties have implemented a series of client-centered processes to provide…

  20. Spatial and temporal variability of snow accumulation in Dronning Maud Land, East Antarctica, including two deep ice coring sites at Dome Fuji and EPICA DML

    Microsoft Academic Search

    S. Fujita; P. Holmlund; I. Andersson; I. Brown; H. Enomoto; Y. Fujii; K. Fujita; K. Fukui; T. Furukawa; M. Hansson; K. Hara; Y. Hoshina; M. Igarashi; Y. Iizuka; S. Imura; S. Ingvander; T. Karlin; H. Motoyama; F. Nakazawa; H. Oerter; L. E. Sjöberg; S. Sugiyama; S. Surdyk; J. Ström; R. Uemura; F. Wilhelms

    2011-01-01

    To better understand the spatio-temporal variability of the glaciological environment in Dronning Maud Land (DML), East Antarctica, investigations were carried out along the 2800-km-long Japanese-Swedish IPY 2007\\/2008 traverse. The route covers ice sheet ridges and two deep ice coring sites at Dome Fuji and EPICA DML. The surface mass balance (SMB) distribution was derived based on analysis of isochrones within

  1. Characterization of nutrients in the atmospheric wet and dry deposition observed at the two monitoring sites over Yellow Sea and East China Sea

    Microsoft Academic Search

    Guosen Zhang; Jing Zhang; Sumei Liu

    2007-01-01

    To investigate the atmospheric deposition of nutrients into the coastal and shelf regions of the northwest Pacific Ocean,\\u000a observation sites were established upon Qianliyan Island (within the Yellow Sea) and the Shengsi Archipelago (within the East\\u000a China Sea), respectively. Nutrient concentrations, including $$ {\\\\text{NH}}^{ + }_{4} ,{\\\\text{NO}}^{ - }_{3} ,{\\\\text{NO}}^{ - }_{2} ,{\\\\text{PO}}^{{3 - }}_{4} {\\\\text{ and SiO}}^{{2 - }}_{3}

  2. Completion Report for Well ER-20-4 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2011-04-30

    Well ER-20-4 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Restoration Project at the Nevada National Security Site, Nye County, Nevada. The well was drilled in August and September 2010 as part of the Pahute Mesa Phase II drilling program. The primary purpose of the well was to investigate the possibility of radionuclide transport from up-gradient underground nuclear tests conducted in central Pahute Mesa. This well also provided detailed hydrogeologic information in the Tertiary volcanic section that will help reduce uncertainties within the Pahute Mesa-Oasis Valley hydrostratigraphic framework model.

  3. Assessment of Stormflow and Water Quality from Undisturbed and Site Prepared Forest Land in East Texas (Interim Report) 

    E-print Network

    DeHaven, M. G.; Blackburn, W. H.; Knight, R. W.; Weichert, A. T.

    1982-01-01

    In 1979, nine small forested watersheds were instrumented in East Texas to determine the effect of intensive forest management practices On water quantity and quality. Three replications of three treatments were used: ...

  4. Effect of Forest Site Preparation and Livestock Grazing on Stormflow and Water Quality in the South East 

    E-print Network

    Hunter, T. K.; Blackburn, W. H.; Weichert, A. T.; Dobrowolski, J. P.

    1983-01-01

    The commercial forestlands of East Texas and Louisiana are the most water-efficient producing areas of the two states. Current and projected water shortages for Texas makes this water-rich area extremely important to future ...

  5. CHARACTERIZATION OF MERCURY CONTAMINATION AT THE EAST FORK POPLAR CREEK SITE, OAK RIDGE, TENNESSEE: A CASE STUDY

    EPA Science Inventory

    Historic accidental release of mercury-contaminated material associated with nuclear weapons production at East Fork Poplar Creek (EFPC) resulted in stream and floodplain contamination. he EFPC is designated as an Oak Ridge Reservation (ORR) operable unit under the Comprehensive ...

  6. Assessment of Stormflow and Water Quality from Undisturbed and Site Prepared Forest Land in East Texas (Final Report) 

    E-print Network

    DeHaven, M. G.; Blackburn, W. H.; Nieber, J. L.; Crawley, W. W.; Weichert, A. T.

    1983-01-01

    In 1979, nine small forested watersheds were instrumented in East Texas to determine the effect of intensive forest management practices On water quantity and quality. Three replications of three treatments were used: 1) clearcutting - followed...

  7. Career Spanish at Mesa State College.

    ERIC Educational Resources Information Center

    Pilkenton, David

    The development and results of Career Spanish instruction at Mesa State College in Colorado from 1975 to 1991 are described. The class is an individualized, career-oriented class for students who have only 3 to 6 semester hours available for foreign language study and an interest in particular vocational applications of Spanish. With no…

  8. USGS Researcher at Mesa Alta, New Mexico

    USGS Multimedia Gallery

    USGS researcher Craig Allen stands on the edge of Mesa Alta, amid diverse forest and woodland in the uplands of northern New Mexico; note some recently dead ponderosa pine and Douglas-fir in the field of view. Forest drought stress is strongly correlated with tree mortality from poor growth, bark be...

  9. Limnology of Blue Mesa, Morrow Point, and Crystal Reservoirs, Curecanti National Recreation area, during 1999, and a 25-year retrospective of nutrient conditions in Blue Mesa Reservoir, Colorado

    USGS Publications Warehouse

    Bauch, Nancy J.; Malick, Matt

    2003-01-01

    The U.S. Geological Survey and the National Park Service conducted a water-quality investigation in Curecanti National Recreation Area in Colorado from April through December 1999. Current (as of 1999) limnological characteristics, including nutrients, phytoplankton, chlorophyll-a, trophic status, and the water quality of stream inflows and reservoir outflows, of Blue Mesa, Morrow Point, and Crystal Reservoirs were assessed, and a 25-year retrospective of nutrient conditions in Blue Mesa Reservoir was conducted. The three reservoirs are in a series on the Gunnison River, with an upstream to downstream order of Blue Mesa, Morrow Point, and Crystal Reservoirs. Physical properties and water-quality samples were collected four times during 1999 from reservoir, inflow, and outflow sites in and around the recreation area. Samples were analyzed for nutrients, phytoplankton and chlorophyll-a (reservoir sites only), and suspended sediment (stream inflows only). Nutrient concentrations in the reservoirs were low; median total nitrogen and phosphorus concentrations were less than 0.4 and 0.06 milligram per liter, respectively. During water-column stratification, samples collected at depth had higher nutrient concentrations than photic-zone samples. Phytoplankton community and density were affected by water temperature, nutrients, and water residence time. Diatoms were the dominant phytoplankton throughout the year in Morrow Point and Crystal Reservoirs and during spring and early winter in Blue Mesa Reservoir. Blue-green algae were dominant in Blue Mesa Reservoir during summer and fall. Phytoplankton density was highest in Blue Mesa Reservoir and lowest in Crystal Reservoir. Longer residence times and warmer temperatures in Blue Mesa Reservoir were favorable for phytoplankton growth and development. Shorter residence times and cooler temperatures in the downstream reservoirs probably limited phytoplankton growth and development. Median chlorophyll-a concentrations were higher in Blue Mesa Reservoir than Morrow Point or Crystal Reservoirs. Blue Mesa Reservoir was mesotrophic in upstream areas and oligotrophic downstream. Both Morrow Point and Crystal Reservoirs were oligotrophic. Trophic-state index values were determined for total phosphorus, chlorophyll-a, and Secchi depth for each reservoir by the Carlson method; all values ranged between 29 and 55. Only the upstream areas in Blue Mesa Reservoir had total phosphorus and chlorophyll-a indices above 50, reflecting mesotrophic conditions. Nutrient inflows to Blue Mesa Reservoir, which were derived primarily from the Gunnison River, varied on a seasonal basis, whereas nutrient inflows to Morrow Point and Crystal Reservoirs, which were derived primarily from deep water releases from the respective upstream reservoir, were steady throughout the sampling period. Total phosphorus concentrations were elevated in many stream inflows. A comparison of current (as of 1999) and historical nutrient, chlorophyll-a, and trophic conditions in Blue Mesa Reservoir and its tributaries indicated that the trophic status in Blue Mesa Reservoir has not changed over the last 25 years, and more recent nutrient enrichment has not occurred.

  10. Completion Report for Well ER-EC-12 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2011-04-30

    Well ER-EC-12 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Restoration Project at the Nevada National Security Site (formerly known as the Nevada Test Site), Nye County, Nevada. The well was drilled in June and July 2010 as part of the Pahute Mesa Phase II drilling program. The primary purpose of the well was to provide detailed hydrogeologic information in the Tertiary volcanic section in the area between Pahute Mesa and the Timber Mountain caldera complex that will help address uncertainties within the Pahute Mesa–Oasis Valley hydrostratigraphic model. In particular, the well was intended to help define the structural position and hydraulic parameters for volcanic aquifers potentially down-gradient from historic underground nuclear tests on Pahute Mesa. It may also be used as a long-term monitoring well.

  11. Completion Report for Well ER-EC-15 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2011-05-31

    Well ER-EC-15 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Restoration Project at the Nevada National Security Site (formerly known as the Nevada Test Site), Nye County, Nevada. The well was drilled in October and November 2010, as part of the Pahute Mesa Phase II drilling program. The primary purpose of the well was to provide detailed hydrogeologic information in the Tertiary volcanic section in the area between Pahute Mesa and the Timber Mountain caldera complex that will help address uncertainties within the Pahute Mesa–Oasis Valley hydrostratigraphic model. In particular, the well was intended to help define the structural position and hydraulic parameters of volcanic aquifers potentially down-gradient from underground nuclear tests on Pahute Mesa. It may also be used as a long-term monitoring well.

  12. Feasibility Study of Biopower in East Helena, Montana. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites

    SciTech Connect

    Moriarty, K.

    2013-02-01

    The U.S. Environmental Protection Agency (EPA) developed the RE-Powering America's Land initiative to reuse contaminated sites for renewable energy generation when aligned with the community's vision for the site. The former American Smelting and Refining Company (Asarco) smelter in East Helena, Montana, was selected for a feasibility study under the initiative. Biomass was chosen as the renewable energy resource based on the wood products industry in the area. Biopower was selected as the technology based on Montana's renewable portfolio standard (RPS) requiring utilities to purchase renewable power.

  13. Late Cenozoic stable isotope stratigraphy and paleoceanography of DSDP sites from the east equatorial and central north Pacific Ocean

    Microsoft Academic Search

    Lloyd D. Keigwin

    1979-01-01

    Stable isotopic analyses of Middle Miocene to Quaternary foraminiferal calcite from east equatorial and central north Pacific DSDP cores have provided much new information on the paleoceanography of the Pacific Neogene. The history of delta18O change in planktonic foraminifera reflects the changing isotopic composition and temperature of seawater at the time of test formation. Changes in the isotopic composition of

  14. Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Methodology, input data and comparisons to previous results for ten test sites

    Microsoft Academic Search

    D. L. Bernreuter; J. B. Savy; R. W. Mensing; J. C. Chen

    1989-01-01

    The EUS Seismic Hazard Characterization Project (SHC) is the outgrowth of an earlier study performed as part of the US Nuclear Regulatory Commission's (NRC) Systematic Evaluation Program (SEP). The objectives of the SHC were: (1) to develop a seismic hazard characterization methodology for the region east of the Rocky Mountains (EUS), and (2) the application of the methodology to 69

  15. Developing MESA: An accelerated reliability test

    Microsoft Academic Search

    G. Baskoro; J. L. Rouvroye; W. Bacher; A. C. Brombacher

    2003-01-01

    This paper describes the on-going research on an accelerated reliability test strategy called MESA (Multiple Environment Stress Analysis) intended to find in a fast and efficient manner (potential) reliability problems during the design phase of high volume consumer products. This test has shown promising results on its capability to provoke failures, especially on failures formerly registered as NFF (no-fault-found). The

  16. The MESA accelerometer for space application

    NASA Technical Reports Server (NTRS)

    Lange, William G.; Dietrich, Robert W.

    1990-01-01

    An electrostatically suspended proof mass in the Miniature Electrostatic Accelerometer (MESA) is used to measure acceleration in the submicro-g range. Since no fixed mechanical suspension (such as springs or strings) is used, the constrainment scaling can be changed electrically after being placed in orbit. A single proof mass can sense accelerations in three axes simultaneously. It can survive high-g pyrotechnic-generated shocks and launch environments while unpowered.

  17. MESA: Modules for Experiments in Stellar Astrophysics

    NASA Astrophysics Data System (ADS)

    Paxton, Bill; Bildsten, Lars; Dotter, Aaron; Herwig, Falk; Lesaffre, Pierre; Timmes, Frank

    2010-10-01

    Stellar physics and evolution calculations enable a broad range of research in astrophysics. Modules for Experiments in Stellar Astrophysics (MESA) is a suite of open source libraries for a wide range of applications in computational stellar astrophysics. A newly designed 1-D stellar evolution module, MESA star, combines many of the numerical and physics modules for simulations of a wide range of stellar evolution scenarios ranging from very-low mass to massive stars, including advanced evolutionary phases. MESA star solves the fully coupled structure and composition equations simultaneously. It uses adaptive mesh refinement and sophisticated timestep controls, and supports shared memory parallelism based on OpenMP. Independently usable modules provide equation of state, opacity, nuclear reaction rates, and atmosphere boundary conditions. Each module is constructed as a separate Fortran 95 library with its own public interface. Examples include comparisons to other codes and show evolutionary tracks of very low mass stars, brown dwarfs, and gas giant planets; the complete evolution of a 1 Msun star from the pre-main sequence to a cooling white dwarf; the Solar sound speed profile; the evolution of intermediate mass stars through the thermal pulses on the He-shell burning AGB phase; the interior structure of slowly pulsating B Stars and Beta Cepheids; evolutionary tracks of massive stars from the pre-main sequence to the onset of core collapse; stars undergoing Roche lobe overflow; and accretion onto a neutron star.

  18. Material Re-use: Re-appropriating the Rio Mesa Barn Rio Mesa Fellowship Students: Jessica Gilmore & Joshua Weber

    E-print Network

    Tipple, Brett

    Material Re-use: Re-appropriating the Rio Mesa Barn Rio Mesa Fellowship is to evaluate the potential of material deconstruction and reuse in architecture and documentation for qualitative interpretation; and taking material and connection

  19. Estimation of Groundwater Recharge at Pahute Mesa using the Chloride Mass-Balance Method

    SciTech Connect

    Cooper, Clay A [DRI] [DRI; Hershey, Ronald L [DRI] [DRI; Healey, John M [DRI] [DRI; Lyles, Brad F [DRI] [DRI

    2013-07-01

    Groundwater recharge on Pahute Mesa was estimated using the chloride mass-balance (CMB) method. This method relies on the conservative properties of chloride to trace its movement from the atmosphere as dry- and wet-deposition through the soil zone and ultimately to the saturated zone. Typically, the CMB method assumes no mixing of groundwater with different chloride concentrations; however, because groundwater is thought to flow into Pahute Mesa from valleys north of Pahute Mesa, groundwater flow rates (i.e., underflow) and chloride concentrations from Kawich Valley and Gold Flat were carefully considered. Precipitation was measured with bulk and tipping-bucket precipitation gauges installed for this study at six sites on Pahute Mesa. These data, along with historical precipitation amounts from gauges on Pahute Mesa and estimates from the PRISM model, were evaluated to estimate mean annual precipitation. Chloride deposition from the atmosphere was estimated by analyzing quarterly samples of wet- and dry-deposition for chloride in the bulk gauges and evaluating chloride wet-deposition amounts measured at other locations by the National Atmospheric Deposition Program. Mean chloride concentrations in groundwater were estimated using data from the UGTA Geochemistry Database, data from other reports, and data from samples collected from emplacement boreholes for this study. Calculations were conducted assuming both no underflow and underflow from Kawich Valley and Gold Flat. Model results estimate recharge to be 30 mm/yr with a standard deviation of 18 mm/yr on Pahute Mesa, for elevations >1800 m amsl. These estimates assume Pahute Mesa recharge mixes completely with underflow from Kawich Valley and Gold Flat. The model assumes that precipitation, chloride concentration in bulk deposition, underflow and its chloride concentration, have been constant over the length of time of recharge.

  20. Arias intensity assessment of liquefaction test sites on the east side of San Francisco Bay affected by the Loma Prieta, California, earthquake of 17 October 1989

    USGS Publications Warehouse

    Kayen, R.E.

    1997-01-01

    Abstract. Uncompacted artificial-fill deposits on the east side of San Francisco Bay suffered severe levels of soil liquefaction during the Loma Prieta earthquake of 17 October 1989. Damaged areas included maritime-port facilities, office buildings, and shoreline transportation arteries, ranging from 65 to 85 km from the north end of the Loma Prieta rupture zone. Typical of all these sites, which represent occurrences of liquefaction-induced damage farthest from the rupture zone, are low cone penetration test and Standard Penetration Test resistances in zones of cohesionless silty and sandy hydraulic fill, and underlying soft cohesive Holocene and Pleistocene sediment that strongly amplified ground motions. Postearthquake investigations at five study sites using standard penetration tests and cone penetration tests provide a basis for evaluation of the Arias intensity-based methodology for assessment of liquefaction susceptibility. ?? 1997 Kluwer Academic Publishers.

  1. EAST AFRICA EAST AFRICA

    E-print Network

    Denham, Graham

    in rwanda Helped review and develop nurse training curriculum and overall medical education in Rwanda.7+million SHARCNET Access granted to all partner universities in East Africa CIDA UPCD project, Rebuilding Star grant for diabetes diagnostics project in Kenya led by Jin Zhang (2011) $100thousand Formation

  2. Varying depositional environments across the Oligocene-Miocene boundary and their relevance for East Antarctic ice sheet history: IODP Site U1356, Wilkes Land margin

    NASA Astrophysics Data System (ADS)

    Salabarnada, Ariadna; Escutia, Carlota; Nelson, Hans; Damuth, John E.; Brinkhuis, Henk

    2014-05-01

    IODP Expedition 318 drilled seven sites in two transects across the Wilkes Land (WL) margin of Antarctica. The objective was to obtain a long-term record of the Cenozoic Antarctic glaciation in response to climatic changes, including major transitions. Our work focuses on the study of nearly 300 meters of Oligocene-early Miocene sediments from Site 1356 (cores 42R to 72R) located on a channel levee in the lower continental rise. Shipboard core descriptions reported these sediments to consist of strongly bioturbated claystone and calcareous claystone with Zoophycos or Nereites ichnofacies. Subordinate lithofacies include: 1) laminated silty claystones, 2) convoluted claystones, sandstones and conglomerates; 3) mudstones and sandstones, with a few dispersed to common clasts; and 4) graded or cross-laminated siltstones and sandstones. Based on our study of facies associations in the cores, we differentiate 3 major sedimentary phases, representing important changes in the depositional environments off the WL margin. During the early-late Oligocene, sediments record deposition in a deep-water setting, with bottom currents reworking hemipelagic sediments. Late Oligocene sedimentary processes are dominated by successive fine- to coarse-grained debris-flow mass transport deposits. In the early Miocene, turbidites and hemipelagic sedimentation, characteristic of levee deposition, dominate. With this interpretation of sedimentary environments, plus the correlation between Site U1356 and seismic reflection profiles at the site and vicinity, we can begin to link the relation between along-slope and down-slope processes to the evolution of the East Antarctic Ice Sheet.

  3. Genesis and continuity of quaternary sand and gravel in glacigenic sediment at a proposed low-level radioactive waste disposal site in east-central Illinois

    USGS Publications Warehouse

    Troost, K.G.; Curry, B. Brandon

    1991-01-01

    The Illinois Department of Nuclear Safety has characterized the Martinsville Alternative Site (MAS) for a proposed low-level radioactive waste disposal facility. The MAS is located in east-central Illinois approximately 1.6 km (1 mi) north of the city of Martinsville. Geologic investigation of the 5.5-km2 (1380-acre) site revealed a sequence of chiefly Illinoian glacigenic sediments from 6 to 60 m (20-200 ft) thick overlying two major bedrock valleys carved in Pennsylvanian strata. Relatively permeable buried units include basal, preglacial alluvium; a complex of intraglacial and subglacial sediment; englacial deposits; and supraglacial fluvial deposits. Postglacial alluvium underlies stream valleys on and adjacent to the site. In most areas, the buried sand units are confined by low-permeability till, lacustrine sediment, colluvium, and loess. The distribution and thickness of the most extensive and continuous buried sand units have been modified considerably by subglacial erosion, and their distributions have been influenced by the buried bedrock valleys. The most continuous of the various sand units were deposited as preglacial and postglacial alluvium and are the uppermost and lowermost stratigraphic units at the alternative site. Sand units that were deposited in englacial or ice-marginal environments are less continuous. Aquifer pumping tests, potentiometric head data, and groundwater geochemistry analyses indicate minimal interaction of groundwater across localized interconnections of the permeable units. ?? 1991 Springer-Verlag New York Inc.

  4. 13. VIEW OF WESTERN CANAL EAST OF CARRIAGE LANE IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. VIEW OF WESTERN CANAL EAST OF CARRIAGE LANE IN TEMPE, SHOWING DROP STRUCTURE AND GROUNDWATER PUMP. THIS IS THE LAST OF FOUR PUMPS WHICH FEED DIRECTLY INTO THE CANAL BETWEEN ALMA SCHOOL ROAD AND PRICE ROAD. ON THIS DAY, ALL FOUR PUMPS, OPERATING AT FULL OUTPUT, HAVE CONSIDERABLY SWELLED THE FLOW TO THE CANAL. NOTE THE OLD FASHIONED BRICKWORK ON THE NORTH BANK. - Western Canal, South side of Salt River between Tempe, Phoenix & Mesa, Mesa, Maricopa County, AZ

  5. Pollen analysis of Anasazi sites at Black Mesa, Arizona 

    E-print Network

    Murry, Robert Earl

    1983-01-01

    and Morris 30 1977). The H. S. Compositae category (spines more than ca. 1. 5-2 microns in length) represents plants which are characteristically insect or animal pollinated (entomophilous or zoophilous), while the L. S. Compositae (spines less than 1. 5...

  6. Feasibility Study of Economics and Performance of Solar Photovoltaics at the TechCity East Campus Resource Conservation and Recovery Act Site in Kingston, New York. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites

    SciTech Connect

    Salasovich, J.; Geiger, J. W.; Mosey, G.; Healey, V.

    2014-01-01

    The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the TechCity East Campus site in Kingston, New York, for a feasibility study of renewable energy production. The National Renewable Energy Laboratory (NREL) provided technical assistance for this project. The purpose of this study is to assess the site for a possible photovoltaic (PV) system installation and estimate the cost, performance, and site impacts of different PV options. In addition, the report recommends financing options that could assist in the implementation of a PV system at the site.

  7. Fiscal year 1996 decontamination and decommissioning activities photobriefing book for the Argonne National Laboratory-East Site, Technology Development Division, Waste Management Program, Decontamination and Decommissioning Projects Department

    SciTech Connect

    NONE

    1996-12-31

    The Photobriefing Book describes the Decontamination and Decommissioning (D and D) Program at the Argonne National Laboratory-East Site (ANL-E) near Lemont, Illinois. This book summarizes current D and D projects, reviews fiscal year (FY) 1996 accomplishments, and outlines FY 1997 goals. A section on D and D Technology Development provides insight on new technologies for D and D developed or demonstrated at ANL-E. Past projects are recapped and upcoming projects are described as Argonne works to accomplish its commitment to, ``Close the Circle on the Splitting of the Atom.`` Finally, a comprehensive review of the status and goals of the D and D Program is provided to give a snap-shot view of the program and the direction it`s taking as it moves into FY 1997. The D and D projects completed to date include: Plutonium Fuel Fabrication Facility; East Area Surplus Facilities; Experimental Boiling Water Reactor; M-Wing Hot Cell Facilities; Plutonium Gloveboxes; and Fast Neutron Generator.

  8. Assessment of Stormflow and Water Quality from Undisturbed and Site Prepared Forest Land in East Texas (Final Report)

    E-print Network

    DeHaven, M. G.; Blackburn, W. H.; Nieber, J. L.; Crawley, W. W.; Weichert, A. T.

    by shearing and windrowing, 2) clearcutting - followed by roller chopping and 3) undisturbed control. Following treatment, the sheared and windrowed sites exposed 57% of the surface soil compared to 16% for the chopped watersheds. During 1981, the first year...

  9. Performance of loblolly pine (Pinus taeda L.) seedlings and in vitro plantlets on an east Texas site 

    E-print Network

    Rahman, Mohd S.

    1997-01-01

    , survivability, root/shoot biomass ratio and root system architecture, and physiological attributes such as predawn and diurnal water potential, stomatal conductance and transpiration were investigated. Two adjacent sites in Cherokee County, Texas, were...

  10. High Temperature Superconducting Terahertz Emitters with Various Mesa Structures

    NASA Astrophysics Data System (ADS)

    Delfanazari, Kaveh; Tsujimoto, M.; Kashiwagi, T.; Asai, H.; Kitamura, T.; Yamamoto, T.; Sawamura, M.; Ishida, K.; Watanabe, C.; Sekimoto, S.; Minami, H.; Tachiki, M.; Hattori, T.; Klemm, R. A.; Kadowaki, K.

    2013-03-01

    In 2007, the first observation of the coherent terahertz (THz) electromagnetic (EM) waves from a mesa structures of intrinsic Josephson junctions (IJJs) in high temperature superconductor Bi2Sr2CaCu2O8+? (Bi-2212) is reported. The ac-Josephson effect as well as the cavity resonance conditions is considered as the principle mechanism of the THz radiation. In order to understand the cavity effect in THz radiation from IJJ mesas more clearly, we studied mesas with various geometries; various kinds of triangles, and pentagonal mesas with various sizes and thicknesses. The focused ion beam (FIB) milling technique is used in all mesa fabrications. In this talk, we discuss our recent progress in THz emission observation in pentagonal mesas. In 2007, the first observation of the coherent terahertz (THz) electromagnetic (EM) waves from a mesa structures of intrinsic Josephson junctions (IJJs) in high temperature superconductor Bi2Sr2CaCu2O8+? (Bi-2212) is reported. The ac-Josephson effect as well as the cavity resonance conditions is considered as the principle mechanism of the THz radiation. In order to understand the cavity effect in THz radiation from IJJ mesas more clearly, we studied mesas with various geometries; various kinds of triangles, and pentagonal mesas with various sizes and thicknesses. The focused ion beam (FIB) milling technique is used in all mesa fabrications. In this talk, we discuss our recent progress in THz emission observation in pentagonal mesas. This work has been supported in part by CREST-JST (Japan Science and Technology Agency), WPI-MANA project (NIMS).

  11. Study of the characteristics of silicon MESA radiation detectors

    Microsoft Academic Search

    D. Chren; M. Juneau; Z. Kohout; C. Lebel; V. Linhart; P. Roy; A. Saintonge; B. Sopko

    2001-01-01

    The MESA process for building silicon diodes is described. I–V and C–V features of MESA detectors are given. Results of pulse-height spectra measurements with ? particles incident on the front and back sides of a MESA diode establish the energy resolution of these detectors, show the evolution of their response as a function of applied bias voltage, and bring information

  12. Upper Crustal Structure above Off-axis Magma Lenses at RIDGE-2000 East Pacific Rise Integrated Study Site from 3D Multichannel Seismic Reflection Data

    NASA Astrophysics Data System (ADS)

    Han, S.; Carbotte, S. M.; Carton, H. D.; Newman, K. R.; Canales, J.; Nedimovic, M. R.

    2010-12-01

    The 2008 multi-streamer 3D seismic reflection experiment conducted aboard the R/V Marcus Langseth at the RIDGE-2000 East Pacific Rise Integrated Study Site reveals prominent near-axis crustal reflectors on both the east and west flanks of the ridge crest which are interpreted as off-axis melt lenses (OAML) injected at mid-crustal levels. These OAML are probable sites of off-axis volcanism and provide potential heat sources for localized hydrothermal circulation on the ridge flanks, which we speculate may affect off-axis upper crustal structure. To investigate the effect of OAML on the upper crustal structure, we choose two across-axis lines above a prominent OAML on the east flank of the ridge that is present in the southernmost part of our study area: Line 1428P across the middle part of the OAML near 9° 38’N and Line 1476P across the northern end of this OAML near 9° 39’N. Initial analysis includes 2D processing to produce seismic reflection images for each line and 1D travel time modeling on CMP super gathers to characterize Layer 2A and upper Layer 2B velocity structure. Comparison of seismic reflection images and upper crustal velocity structure for the two lines shows a decrease in Layer 2A thickness by 150m and a decrease in the uppermost 2B velocity by 10-20% above the central portion of OAML. We attribute these local anomalies to alteration associated with off-axis hydrothermal circulation driven by the OAML where enhanced precipitation of alteration minerals may seal porosity within lowermost Layer 2A, converting it to lower velocity uppermost Layer 2B. To further constrain the velocity structure of Layer 2A and Layer 2B, we conduct 2D P-wave tomography with downward continued shot gathers along the studied lines (Harding et al, 2007). The downward continued shot gathers simulate seismic sources and receivers located near the seafloor, and therefore provide travel time information from near-offset refractions that are normally obscured by the seafloor reflection. Layer 2A and 2B arrivals from the downward continued shot gathers are picked and a regularized non-linear inversion is conducted with FAST software (Zelt & Barton, 1998). We present the tomography results as well as associated 3D seismic reflection images that encompass the OAML. With this analysis we aim to better constrain the spatial extent of altered upper crust associated with the OAML. The results have implications for the processes of the crustal formation and off-axis hydrothermal activity on fast-spreading mid-ocean ridges.

  13. Food Habits of the Northern Spotted Owl (Strix occidentalis caurina) at Six Nest Sites in Washington's East Cascades

    Microsoft Academic Search

    Kenneth R. Bevis; Jo Ellen Richards; Gina M. King; Eric E. Hanson

    This paper reports on 245 pellet samples containing 479 identified prey items collected at six Northern Spotted Owl (Strix occidentalis caurina) breeding sites in the eastern portion of its range. The majority of prey (biomass) came from four species; northern flying squirrels (Glaucomys sabrinus), bushy-tailed woodrats (Neotoma cinerea), northern pocket gopher (Thomomys talpoides), and pika (Ochotona princeps). Flying squirrels were

  14. Prediction and characterization of novel epitopes of serotype A foot-and-mouth disease viruses circulating in East Africa using site-directed mutagenesis.

    PubMed

    Bari, Fufa Dawo; Parida, Satya; Asfor, Amin S; Haydon, Daniel T; Reeve, Richard; Paton, David J; Mahapatra, Mana

    2015-05-01

    Epitopes on the surface of the foot-and-mouth disease virus (FMDV) capsid have been identified by monoclonal antibody (mAb) escape mutant studies leading to the designation of four antigenic sites in serotype A FMDV. Previous work focused on viruses isolated mainly from Asia, Europe and Latin America. In this study we report on the prediction of epitopes in African serotype A FMDVs and testing of selected epitopes using reverse genetics. Twenty-four capsid amino acid residues were predicted to be of antigenic significance by analysing the capsid sequences (n?=?56) using in silico methods, and six residues by correlating capsid sequence with serum-virus neutralization data. The predicted residues were distributed on the surface-exposed capsid regions, VP1-VP3. The significance of residue changes at eight of the predicted epitopes was tested by site-directed mutagenesis using a cDNA clone resulting in the generation of 12 mutant viruses involving seven sites. The effect of the amino acid substitutions on the antigenic nature of the virus was assessed by virus neutralization (VN) test. Mutations at four different positions, namely VP1-43, VP1-45, VP2-191 and VP3-132, led to significant reduction in VN titre (P value?=?0.05, 0.05, 0.001 and 0.05, respectively). This is the first time, to our knowledge, that the antigenic regions encompassing amino acids VP1-43 to -45 (equivalent to antigenic site 3 in serotype O), VP2-191 and VP3-132 have been predicted as epitopes and evaluated serologically for serotype A FMDVs. This identifies novel capsid epitopes of recently circulating serotype A FMDVs in East Africa. PMID:25614587

  15. Survey of Critical Wetlands and Riparian Areas in Mesa County

    E-print Network

    Survey of Critical Wetlands and Riparian Areas in Mesa County Colorado Natural Heritage Program, Colorado 80523 #12;Survey of Critical Wetlands and Riparian Areas in Mesa County Prepared for: Colorado to the landowners who gave us permission to survey their property. We enjoyed meeting them, and in some cases hiking

  16. Enhanced concentrations of citric acid in spring aerosols collected at the Gosan background site in East Asia

    NASA Astrophysics Data System (ADS)

    Jung, Jinsang; Kawamura, Kimitaka

    2011-09-01

    In order to investigate water-soluble dicarboxylic acids and related compounds in the aerosol samples under the Asian continent outflow, total suspended particle (TSP) samples ( n = 32) were collected at the Gosan site in Jeju Island over 2-5 days integration during 23 March-1 June 2007 and 16-24 April 2008. The samples were analyzed for water-soluble dicarboxylic acids, ketocarboxylic acids, and ?-dicarbonyls using a capillary gas chromatography technique. We found elevated concentrations of atmospheric citric acid (range: 20-320 ng m -3) in the TSP samples during mid- to late April of 2007 and 2008. To specify the sources of citric acid, dicarboxylic acids and related compounds were measured in the pollen sample collected at the Gosan site (Pollen_Gosan), authentic pollen samples from Japanese cedar ( Cryptomeria) (Pollen_cedar) and Japanese cypress ( Chamaecyparis obtusa) (Pollen_cypress), and tangerine fruit produced from Jeju Island. Citric acid (2790 ng in unit mg of pollen mass) was found as most abundant species in the Pollen_Gosan, followed by oxalic acid (2390 ng mg -1). Although citric acid was not detected in the Pollen_cedar and Pollen_cypress as major species, it was found as a dominant species in the tangerine juice while malic acid was detected as major species in the tangerine peel, followed by oxalic and citric acids. Since Japanese cedar trees are planted around tangerine farms to prevent strong winds from the Pacific Ocean, citric acid that may be directly emitted from tangerine is likely adsorbed on pollens emitted from Japanese cedar and then transported to the Gosan site. Much lower malic/citric acid ratios obtained under cloudy condition than clear condition suggest that malic acid may rapidly decompose to lower molecular weight compounds such as oxalic and malonic acids (

  17. Geohydrology of Pahute Mesa-3 test well, Nye County, Nevada

    SciTech Connect

    Kilroy, K.C.; Savard, C.S.

    1997-02-01

    The Pahute Mesa-3 test well is on Pahute Mesa about 3 miles west of the Nevada Test Site and 20 miles northeast of Oasis Valley near Beatty, Nevada. The well was drilled for the U.S. Department of Energy Radionuclide Migration Program to monitor conditions near the western edge of the Nevada Test Site. The well was drilled with conventional rotary methods and an air-foam drilling fluid to a depth of 3,019 feet. A 10.75-inch diameter steel casing was installed to a depth of 1,473 feet. The test well penetrates thick units of non-welded to partly welded ash-flow and air-fall tuff of Tertiary age with several thin layers of densely welded tuff, rhyolite and basalt flows, and breccia. Geophysical logs indicate that fractures are significant in the Tiva Canyon Tuff of the Paintbrush Group and this was confirmed by high flow in this unit during a borehole-flow survey. The geophysical logs also show that the effective porosity in tuffaceous units ranges from 19 to 38 percent and averages 30 percent, and the total porosity ranges from 33 to 55 percent and averages 42 percent. The measured temperature gradient of 1.00 degree Celsius per 100 feet is steep, but is similar to that of other nearby wells, one of which penetrates a buried granite intrusion. Injection tests for six intervals of the well yielded transmissivities that ranged from 3.1 x 10{sup -3} to 25 feet squared per day and hydraulic conductivities that ranged from 6 x 10{sup -5} to 0.12 foot per day. The sum of the transmissivities is 28 feet squared per day and the geometric mean of hydraulic conductivity is 1.7 x 10{sup -3} foot per day. Estimates of storage coefficient range from 2.1 x 10{sup -5} to 3.8 x 10{sup -3}, indicating that the aquifer responded to the injection tests in a confined manner. An aquifer test produced a drawdown of 78 feet during 31 hours of testing at 169 gallons per minute.

  18. National uranium resource evaluation: Mesa quaddrangle, Arizona

    SciTech Connect

    Luning, R.H.; Thiede, D.S.; O'Neill, A.J.; Nystrom, R.J.; White, D.L.

    1982-06-01

    The Mesa Quadrangle (2/sup 0/), Arizona, was evaluated to a depth of 1500 meters to identify geologic environments and delineate surface and subsurface areas favorable for the occurrence of uranium deposits. The criteria used to define uranium favorability were developed during the National Uranium Resource Evaluation program. Surface and subsurface studies were augmented by aerial radiometric surveys and hydrogeochemical and stream-sediment reconnaisance studies. The results of the investigations identified three favorable areas: older Precambrian quartz monzonite near Horseshoe Dam; the gray unit of the Dripping Spring quartzite of Precambrian age in the Sierra Ancha, Salt River Canyon, and Mescal Mountain regions; and Tertiary lake beds near Cave Creek, Horseshoe Dam, and northeastern Tonto Basin. Unfavorable environments include nearly all older Precambrian crystalline and metamorphic rocks, most younger Precambrian igneous and sedimentary rocks, parts of the Paleozoic section, igneous intrusives of Laramide age. Tertiary volcanic rocks, and late Tertiary sedimentary rocks. The eastern third of the quadrangle remains unevaluated because access was prohibited or could not be obtained in time. Environments were unevaluated in older Precambrian volcanic, sedimentary, and metamorphic rocks; the Naco and Supai Formations; Cretaceous sedimentary rocks; and many Tertiary sedimentary rocks in intermontane basins and within the southwestern portion of the quadrangle because of time constraints, land access restrictions, and sparsity of subsurface data.

  19. MesA, a Novel Fungal Protein Required for the Stabilization of Polarity Axes in Aspergillus nidulansD?

    PubMed Central

    Pearson, Claire L.; Xu, Kaimei; Sharpless, Kathryn E.; Harris, Steven D.

    2004-01-01

    The Aspergillus nidulans proteome possesses a single formin, SepA, which is required for actin ring formation at septation sites and also plays a role in polarized morphogenesis. Previous observations imply that complex regulatory mechanisms control the function of SepA and ensure its correct localization within hyphal tip cells. To characterize these mechanisms, we undertook a screen for mutations that enhance sepA defects. Of the mutants recovered, mesA1 causes the most dramatic defect in polarity establishment when SepA function is compromised. In a wild-type background, mesA1 mutants undergo aberrant hyphal morphogenesis, whereas septum formation remains unaffected. Molecular characterization revealed that MesA is a novel fungal protein that contains predicted transmembrane domains and localizes to hyphal tips. We show that MesA promotes the localized assembly of actin cables at polarization sites by facilitating the stable recruitment of SepA. We also provide evidence that MesA may regulate the formation or distribution of sterol-rich membrane domains. Our results suggest that these domains may be part of novel mechanism that directs SepA to hyphal tips. PMID:15155805

  20. 2. VIEW OF EAST TAILING DAM (FOREGROUND), LOOKING EAST SOUTHEAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW OF EAST TAILING DAM (FOREGROUND), LOOKING EAST SOUTHEAST UP WASH TOWARD ORE BIN, OVERBURDEN, ADITS, AND ROAD SHOWN IN CA-290-1. MILL SITE IS UP AND TO THE RIGHT OF THIS VIEW. STANDARD FIFTY-GALLON DRUM IN FOREGROUND GIVES SCALE OF WALL. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  1. Gravimetric response of water table fluctuations in the Sahelian Diffa site (East Niger): local effects including poro-elasticity

    NASA Astrophysics Data System (ADS)

    Hector, B.; Genthon, P.; Le Coz, M.; Hinderer, J.; Chalikakis, K.; Descloitres, M.

    2010-12-01

    The GHYRAF project (Gravimetry and HYdrology in AFrica) is devoted to a regional study of the relationship between hydrological and gravimetric signals in the Western African Monsoon area. Three sites are monitored in a decreasing pluviometric gradient: Djougou (North Benin), Wankama (Niamey area) and Bagara (Eastern Niger) with annual rainfalls amounting to 1200 mm, 600 mm and 350 mm, respectively. The Diffa/Bagara site is located 640m away from the Yobé temporary river, a tributary of Lake Chad fed by rainfall on the Jos Plateau (Nigeria) and that is generally flowing between mid July and January. Apart from this period, the river bed includes a series of ponds that form the top of the aquifer and that are pumped for intensive irrigated cropping. The 50m thick uppermost unconfined aquifer is locally recharged by the Yobé River and is flowing northwards. It has been explored by geophysical methods involving RMS and TDEM soundings, which provided information on its porosity and electrical conductivity, respectively. A series of nearly 50 holes drilled down to a 10 m depth in the Bagara area allowed to define the detailed sedimentary structure of the aquifer. It consists mainly of fluvial deposits with alternating layers of fine sands, coarse grained sands and clays. The sedimentary pile includes clayed layer of centimetric to metric thickness with a mean lateral extension of 300 m. The groundwater level is monitored by a series of 4 piezometers located at 25 m, 270 m, 500 m and 640 m from the river axis. The shape of the piezometric curve at the Bagara station is 0.4 m amplitude sinusoid and presents a maximum level at mid January and a minimum one near mid July. Clearly, water level fluctuations are governed by infiltration from the Yobe river with an offset controlled by the distance to it. With the 20% porosity measured by MRS, this would imply a nearly 30 nms-2 gravimetric signal, which is in fair agreement with the observed amplitude. However both the observed gravimetic signal and the results of the global hydrological model GLDAS are offset with respect to the piezometric one. In order to assess the influence of local effects, the groundwater level is modeled with the USGS finite-difference ModFlow code using different properties sets of the aquifer deduced from statistical analysis of drill-holes data. Poroelasticity effects resulting from variable saturation of the clay layers observed near the water level on the Bagara site are assessed. The ability of gravity data for monitoring annual and long term water level changes in the uppermost aquifer is then discussed.

  2. Record of the early Holocene deglaciation from the East Antarctic Adélie Land margin: IODP Site U1357

    NASA Astrophysics Data System (ADS)

    Escutia, Carlota; Jimenez-Espejo, Francisco; Salabarnada, Ariadna; Gitiérrez-Pastor, Julia

    2015-04-01

    Drilling at Site U1357 yielded a 185.6 m section of Holocene continuously laminated diatom ooze as well as a portion of an underlying Last Glacial Maximum diamict. We present sedimentological and geochemical data of the time of the first Holocene deglaciation. The use of CT-Scanner has allowed us to characterize in detail sedimentary facies dominated by iceberg rafted debris, silt layers and biogenic laminations. In addition, geochemical studies have been conducted at ultra-high (seasonal to decadal) resolution using X-Ray Fluorescence scanning, allowing to reconstruct detrital input, paleoproducitivity and redox conditions. Comparison between CT-Scan images and geochemical data show that the intervals with high Ba/Al and Si/Al are associated to poor detrital levels allowing to use these ratios along the entire core as detrital/paleoproductivity proxies. Detrital proxies (e.g., Zr content) anticorrelate with bottom redox conditions proxies (U/Th) pointing to well oxygenated deep waters as generator for silt layers. These preliminary observations point to an unprecedented high resolution ice fjord-like sequence in the studied region with strong water column stratification and pulsational detrital input acting as a main forcing for environmental variations. Ongoing radiocarbon analysis, performed in the bulk fraction and also in compound-specific, will allow us to recognize timing, cylces and if major variations occurred in the reservoir age during the deglaciation.

  3. 15. Hayden Ditch (Lateral 5), looking east along 8th Street, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Hayden Ditch (Lateral 5), looking east along 8th Street, east of Dorsey. This is an unimproved section of the ditch. Photographer: Mark Durben, June 1989. Source: SRPA - Tempe Canal, South Side Salt River in Tempe, Mesa & Phoenix, Tempe, Maricopa County, AZ

  4. MESA: A 3-D Eulerian hydrocode for penetration mechanics studies

    SciTech Connect

    Mandell, D.A.; Holian, K.S.; Henninger, R.

    1991-01-01

    We describe an explicit, finite-difference hydrocode, called MESA, and compare calculations to metal and ceramic plate impacts with spall and to Taylor cylinder tests. The MESA code was developed with support from DARPA, the Army and the Marine Corps for use in armor/anti-armor problems primarily, but the code has been used for a number of other applications. MESA includes 2-D and 3-D Eulerian hydrodynamics, a number of material strength and fracture models, and a programmed burn high explosives model. 15 refs., 4 figs.

  5. Revised Livermore seismic hazard estimates for sixty-nine nuclear power plant sites east of the Rocky Mountains. Final report, July 1993--March 1994

    SciTech Connect

    Sobel, P.

    1994-04-01

    The draft version of this report presented updated Lawrence Livermore National Laboratory (LLNL) probabilistic seismic hazard analysis estimates for 69 nuclear power plant sites in the region of the United States east of the Rocky Mountains. LLNL performed a re-elicitation of seismicity and ground motion experts to improve their estimates of uncertainty in seismicity parameters and ground motion models. Using these revised inputs, LLNL updated the seismic hazard estimates documented in NUREG/CR-5250 (1989). These updated hazard estimates will be used in future NRC actions. The draft was issued for public comment in October 1993. By the end of the public comment period, February 28, 1994, comments had been received from two nuclear industry companies. The comments from these companies neither contested nor suggested amendments to the technical data conveyed in the report. Rather, they both suggest changes in the Individual Plant External Event Examination (IPEEE) program scope. This report is not the forum for discussion of the IPEEE program. Possible modification to the scope of the IPEEE will be examined in its own setting. Therefore, there are no technical differences between the draft report and this final report. Any information as to modifications to the IPEEE program will be provided to the public via an NRC general communication.

  6. The Olorgesailie Drilling Project (ODP): a high-resolution drill core record from a hominin site in the East African Rift Valley

    NASA Astrophysics Data System (ADS)

    Dommain, R.; Potts, R.; Behrensmeyer, A. K.; Deino, A. L.

    2014-12-01

    The East African rift valley contains an outstanding record of hominin fossils that document human evolution over the Plio-Pleistocene when the global and regional climate and the rift valley itself changed markedly. The sediments of fossil localities typically provide, however, only short time windows into past climatic and environmental conditions. Continuous, long-term terrestrial records are now becoming available through core drilling to help elucidate the paleoenvironmental context of human evolution. Here we present a 500,000 year long high-resolution drill core record obtained from a key fossil and archeological site - the Olorgesailie Basin in the southern Kenya Rift Valley, well known for its sequence of archeological and faunal sites for the past 1.2 million years. In 2012 two drill cores (54 and 166 m long) were collected in the Koora Plain just south of Mt. Olorgesailie as part of the Olorgesailie Drilling Project (ODP) to establish a detailed climate and ecological record associated with the last evidence of Homo erectus in Africa, the oldest transition of Acheulean to Middle Stone Age technology, and large mammal species turnover, all of which are documented in the Olorgesailie excavations. The cores were sampled at the National Lacustrine Core Facility. More than 140 samples of tephra and trachytic basement lavas have led to high-precision 40Ar/39Ar dating. The cores are being analyzed for a suite of paleoclimatic and paleoecological proxies such as diatoms, pollen, fungal spores, phytoliths, ostracodes, carbonate isotopes, leaf wax biomarkers, charcoal, and clay mineralogy. Sedimentological analyses, including lithological descriptions, microscopic smear slide analysis (242 samples), and grain-size analysis, reveal a highly variable sedimentary sequence of deep lake phases with laminated sediments, diatomites, shallow lake and near shore phases, fluvial deposits, paleosols, interspersed carbonate layers, and abundant volcanic ash deposits. Magnetic susceptibility indicates climatic variation potentially related to precessional cycles.

  7. Overview of the Grand Junction Office from Bluff east of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Overview of the Grand Junction Office from Bluff east of facility. Note Buildings #35. #33 and #31A in lower left of photograph. VIEW WEST - Department of Energy, Grand Junction Office, 2597 B3/4 Road, Grand Junction, Mesa County, CO

  8. Sigma Mesa: Background elemental concentrations in soil and vegetation, 1979

    SciTech Connect

    Ferenbaugh, R.W.; Gladney, E.S.; Brooks, G.H. Jr.

    1990-10-01

    In 1979, soil and vegetation samples were collected on Sigma Mesa to provide background data before construction on the mesa. Elemental data are presented for soil, grass, juniper, pinon pine, and oak. None of the data looks out of the ordinary. The purpose of the sampling program was to acquire, before any disturbance, a set of data to be used as background for future impact analysis. 6 refs., 2 figs., 7 tabs.

  9. 1 Greet the metal turtles at the Mesa Public Library.

    E-print Network

    d 1 Greet the metal turtles at the Mesa Public Library. 2 Take a tour of public art. 3 Start from or attend a gallery opening at Mesa Public Library. 11 Hike to the Cave Of The Winds. 12 Join a social group at the Co+op. 18 See a performance at the Little Theater. 19 Shop the Friends of the Library used bookstore

  10. Mineral resources of the Sewemup Mesa Wilderness Study Area, Mesa and Montrose counties, Colorado

    SciTech Connect

    Soulliere, S.J.; Patterson, C.G.; Leibold, A.M.; Kulik, D.M.; Martin, C.M.

    1988-01-01

    The Sewemup Mesa Wilderness Study Area is underlain by sedimentary rocks ranging in age from Pennsylvanian to Jurassic. Within the study area, there are no mines, prospects, economic or marginally economic resources; however, there are inferred subeconomic resources of sand and gravel, and sandstone, and occurrences of evaporite minerals. Geological, geophysical, and geochemical studies indicate a moderate mineral resource potential for uranium, vanadium, and copper in the southeast part of the study area. A moderate resource potential exists for copper and silver in a zone of faulted sedimentary rocks along the northern, western, and southern sides of the study area. The entire area has moderate energy resource potential for oil and gas and low resource potential for geothermal energy, anhydrite, gypsum, and potassium salts. There is no potential for coal resources.

  11. Completion Report for Wells ER-20-8 and ER-20-8#2 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2011-02-28

    Wells ER-20-8 and ER-20-8#2 were drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Restoration Project at the Nevada National Security Site (formerly Nevada Test Site), Nye County, Nevada. The holes were drilled in July and August 2009, as part of the Pahute Mesa Phase II drilling program. The primary purpose of these wells was to provide detailed hydrogeologic information in the Tertiary volcanic section that will help address uncertainties within the Pahute Mesa–Oasis Valley hydrostratigraphic framework model. They may also be used as long-term monitoring wells.

  12. The Middle East Institute

    NSDL National Science Digital Library

    Dedicated to "keeping the public objectively informed about the Middle East," the Middle East Institute provides a number of resources to this end. Visitors to the site can access the table of contents, abstracts, and some complete articles from The Middle East Journal; read online policy briefs about current events in the region; review descriptions of the Institute's published monographs; and consult an online searchable catalog of over 2,400 scholarly works in Middle Eastern studies published in the 1990s. The XML-based catalog can be searched by keyword, title, author, or any of the cataloged fields. Two online texts are also posted here: An Introduction to Islam (see the September 3, 1999 Scout Report) and, in the rare books section of the library, Mehemet the Kurd and Other Tales by Charles Wells (requires multidoc pro to view TEI (SGML)).

  13. Marine Education Society of Australasia, Inc. (MESA)

    NSDL National Science Digital Library

    This Australian organization supports educators interested in coastal and marine environments, identifies best practices in marine education, provides a forum to facilitate the development of environmental education and interpretation programs, and promotes sustainable use of natural resources through education. Programs include: a national awareness campaign; member training, workshops and conferences; a marine educator online discussion board; teaching ideas and resources. Site offers information sheets on marine topics, audio files, marine-related news, online newsletter, recommended websites.

  14. Completion Report for Well ER-EC-13 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2011-05-31

    Well ER-EC-13 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office, in support of the Nevada Environmental Restoration Project at the Nevada National Security Site (formerly Nevada Test Site), Nye County, Nevada. The well was drilled in October 2010 as part of the Pahute Mesa Phase II drilling program. A main objective was to provide detailed hydrogeologic information for the Fortymile Canyon composite unit hydrostratigraphic unit in the Timber Mountain moat area, within the Timber Mountain caldera complex, that will help address uncertainties within the Pahute Mesa–Oasis Valley hydrostratigraphic framework model. This well may also be used as a long-term monitoring well.

  15. Triplet superconductivity in oxide ferromagnetic interlayer of mesa-structure

    NASA Astrophysics Data System (ADS)

    Ovsyannikov, G. A.; Y Constantinian, K.; Sheerman, A. E.; Shadrin, A. V.; Kislinski, Yu V.; Khaydukov, Yu N.; Mustafa, L.; Kalabukhov, A.; Winkler, D.

    2015-03-01

    We present experimental data on Nb-Au/La0.7Sr0.3MnO3/SrRuO3/YBa2Cu3O7-? mesa- structure with in plane linear size 10÷50 ?m. The mesa-structures were patterned from the epitaxial heterostructures fabricated by pulsed laser ablation and magnetron sputtering. Superconducting critical current was observed for mesa-structures with the interlayer thicknesses up to 50 nm. In the mesa-structures with just one, either La0.7Sr0.3MnO3 or SrRuO3 interlayer with a thickness larger than 10 nm no superconducting current was observed. The registered superconducting current for the mesa-structures with a thinner interlayer is attributed to pinholes. Obtained results are discussed in terms of superconducting long-range triplet generation at interfaces of superconductor and a composite ferromagnet consisting of ferromagnetic materials with non-collinear magnetization.

  16. Atmospheric optical turbulence measurements taken at Anderson Mesa, Flagstaff, Arizona between 13-19 November 1989

    NASA Astrophysics Data System (ADS)

    Vaucher, Gail T.; Vaucher, Christopher A.; Walters, Donald L.

    1991-01-01

    From 13 to 19 November 1989, the Naval Postgraduate School Atmospheric Optics Group acquired atmospheric optical turbulence measurements at the 31-inch Lowell Observatory telescope dome facility on Anderson Mesa, 16 km southeast of Flagstaff, Arizona. The parameters measured, the transverse coherence length and the isoplanatic angle, were part of an ongoing site survey for a large-scale, ground-based, synthetic aperture system (100 to 300 m baseline stellar interferometer). This report compiles, analyses and summarizes the acquired optical data. Also discussed are the synoptic meteorological events present during the data acquisition period.

  17. Far East

    SciTech Connect

    Fletcher, G.L.

    1981-10-01

    Petroleum activity throughout the Far East region was on the upswing during 1980. In spite of increased interest in many parts of the Far East, no major new discoveries were reported. From India to Indonesia, old fields are being rehabilitated and previously uneconomic areas are being looked at again. Indonesia set a new record in 1980 for the number of exploratory wells drilled. Peninsular Malaysia set a record for oil production. Overall, however, 1980 was a banner year for petroleum exploration in the Far East. Sri Lanka saw its first foreign contractor interest in several years. India made major moves toward increasing exploration by offering offshore and onshore blocks to foreign contractors . Bangladesh and even Burma signed exploitation contracts with Japanese investors in order to increase production. Malaysia offered new acreage blocks for the first time in several years. Indonesia and the Philippines also actively encouraged exploration by offering new contract areas. One country in the Far East that did not participate in the 1980 oil boom was China. Taiwan also carried on, as in previous years with the Chinese Petroleum Corporation as the only operator. Japanese and South Korean activities were at approximately the same level as in previous years, although drilling did start in the joint development zone. Total production of the Far East reporting region declined slightly. One significant aspect of 1980 petroleum activities throughout the Far East region is the growing acceptance by various Far East countries of Asian investment for developing and exploring for hydrocarbons. Japan is the major investor, but South Korean interests and the Chinese Petroleum Corporation also began to invest in petroleum rights in other Asian countries. The main area for investment continued to be Indonesia. 39 figures, 9 tables.

  18. A Historical Evaluation of the U12t Tunnel, Nevada Test Site, Nye County, Nevada, Volume 5 of 6

    SciTech Connect

    Harold Drollinger; Robert C. Jones; and Thomas F. Bullard; Desert Research Institute, Laurence J. Ashbaugh, Southern Nevada Courier Service and Wayne R. Griffin, Stoller-Navarro Joint Venture

    2009-02-01

    This report presents a historical evaluation of the U12t Tunnel on the Nevada Test Site in southern Nevada. The work was conducted by the Desert Research Institute at the request of the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office and the U.S. Department of Defense, Defense Threat Reduction Agency (DTRA). The U12t Tunnel is one of a series of tunnels used for underground nuclear weapons effects tests on the east side of Rainier and Aqueduct Mesas. Six nuclear weapons effects tests, Mint Leaf, Diamond Sculls, Husky Pup, Midas Myth/Milagro, Mighty Oak, and Mission Ghost, and one high explosive test, SPLAT, were conducted within the U12t Tunnel from 1970 to 1987. All six of the nuclear weapons effects tests and the high explosive test were sponsored by DTRA. Two conventional weapons experiments, Dipole Knight and Divine Eagle, were conducted in the tunnel portal area in 1997 and 1998. These experiments were sponsored by the Defense Special Weapons Agency. The U12t Tunnel complex is composed of the Portal and Mesa Areas and includes an underground tunnel with a main access drift and nine primary drifts, a substantial tailings pile fronting the tunnel portal, a series of discharge ponds downslope of the tailings pile, and two instrumentation trailer parks and 16 drill holes on top of Aqueduct Mesa. A total of 89 cultural features were recorded: 54 at the portal and 35 on the mesa. In the Portal Area, cultural features are mostly concrete pads and building foundations; other features include the portal, rail lines, the camel back, ventilation and cooling system components, communication equipment, and electrical equipment. On the mesa are drill holes, a few concrete pads, a loading ramp, and electrical equipment.

  19. A Historical Evaluation of the U12t Tunnel, Nevada Test Site, Nye County, Nevada, Volume 1 of 6

    SciTech Connect

    Harold Drollinger; Robert C. Jones; and Thomas F. Bullard; Desert Research Institute, Laurence J. Ashbaugh, Southern Nevada Courier Service and Wayne R. Griffin, Stoller-Navarro Joint Venture

    2009-02-01

    This report presents a historical evaluation of the U12t Tunnel on the Nevada Test Site in southern Nevada. The work was conducted by the Desert Research Institute at the request of the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office and the U.S. Department of Defense, Defense Threat Reduction Agency (DTRA). The U12t Tunnel is one of a series of tunnels used for underground nuclear weapons effects tests on the east side of Rainier and Aqueduct Mesas. Six nuclear weapons effects tests, Mint Leaf, Diamond Sculls, Husky Pup, Midas Myth/Milagro, Mighty Oak, and Mission Ghost, and one high explosive test, SPLAT, were conducted within the U12t Tunnel from 1970 to 1987. All six of the nuclear weapons effects tests and the high explosive test were sponsored by DTRA. Two conventional weapons experiments, Dipole Knight and Divine Eagle, were conducted in the tunnel portal area in 1997 and 1998. These experiments were sponsored by the Defense Special Weapons Agency. The U12t Tunnel complex is composed of the Portal and Mesa Areas and includes an underground tunnel with a main access drift and nine primary drifts, a substantial tailings pile fronting the tunnel portal, a series of discharge ponds downslope of the tailings pile, and two instrumentation trailer parks and 16 drill holes on top of Aqueduct Mesa. A total of 89 cultural features were recorded: 54 at the portal and 35 on the mesa. In the Portal Area, cultural features are mostly concrete pads and building foundations; other features include the portal, rail lines, the camel back, ventilation and cooling system components, communication equipment, and electrical equipment. On the mesa are drill holes, a few concrete pads, a loading ramp, and electrical equipment.

  20. A Historical Evaluation of the U12t Tunnel, Nevada Test Site, Nye County, Nevada, Volume 3 of 6

    SciTech Connect

    Harold Drollinger; Robert C. Jones; and Thomas F. Bullard; Desert Research Institute, Laurence J. Ashbaugh, Southern Nevada Courier Service and Wayne R. Griffin, Stoller-Navarro Joint Venture

    2009-02-01

    This report presents a historical evaluation of the U12t Tunnel on the Nevada Test Site in southern Nevada. The work was conducted by the Desert Research Institute at the request of the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office and the U.S. Department of Defense, Defense Threat Reduction Agency (DTRA). The U12t Tunnel is one of a series of tunnels used for underground nuclear weapons effects tests on the east side of Rainier and Aqueduct Mesas. Six nuclear weapons effects tests, Mint Leaf, Diamond Sculls, Husky Pup, Midas Myth/Milagro, Mighty Oak, and Mission Ghost, and one high explosive test, SPLAT, were conducted within the U12t Tunnel from 1970 to 1987. All six of the nuclear weapons effects tests and the high explosive test were sponsored by DTRA. Two conventional weapons experiments, Dipole Knight and Divine Eagle, were conducted in the tunnel portal area in 1997 and 1998. These experiments were sponsored by the Defense Special Weapons Agency. The U12t Tunnel complex is composed of the Portal and Mesa Areas and includes an underground tunnel with a main access drift and nine primary drifts, a substantial tailings pile fronting the tunnel portal, a series of discharge ponds downslope of the tailings pile, and two instrumentation trailer parks and 16 drill holes on top of Aqueduct Mesa. A total of 89 cultural features were recorded: 54 at the portal and 35 on the mesa. In the Portal Area, cultural features are mostly concrete pads and building foundations; other features include the portal, rail lines, the camel back, ventilation and cooling system components, communication equipment, and electrical equipment. On the mesa are drill holes, a few concrete pads, a loading ramp, and electrical equipment.

  1. Sites

    Microsoft Academic Search

    Seth Bates; Tony Smith

    \\u000a SharePoint Foundation 2010 provides the core document management, list management, workflow, collaboration, and application\\u000a platform services for a SharePoint environment. SharePoint sites are the foundation on which business solutions based on the\\u000a Office system store and manage information. Sites provide locations where groups of people can work together and share information.\\u000a They can also be used to collect team and

  2. Deep reflection structure imaged by the 2008 3D seismic reflection Survey at the RIDGE- 2000 East Pacific Rise Integrated Studies Site

    NASA Astrophysics Data System (ADS)

    Nedimovi?, M. R.; Carbotte, S. M.; Mutter, J. C.; Canales, P. J.; Carton, H.; Aghaei, O.; Marjanovi?, M.; Newman, K. R.; Hu, M.; Stowe, L.

    2008-12-01

    The first multi-source and multi-streamer 3D seismic reflection experiment carried out using academic resources was done aboard the R/V Marcus G. Langseth in Summer 2008 during cruise MGL0812. The targeted area was the RIDGE-2000 Integrated Studies Site at the East Pacific Rise. Our primary 3D survey grid extends from about 9° 57'N to 9° 42'N, with a smaller grid just to the south covering approximately from 9° 40'N to 9° 37.5'N. Additionally, about 1 and 0.5 km wide across-ridge-axis swaths of data were collected at 9° 36'N and 9°30'N respectively, as well as an along-ridge-axis swath about 1 km wide and extending from 10° 05'N to 9° 40'N. We here focus on a preliminary analysis of the reflection structure imaged within the lower crust and uppermost mantle. Moho reflection arrivals are imaged through much of the investigated area. The character of Moho reflection events varies from simple, single reflection wavelet to more complex arrivals indicating spatial changes in structure within the Moho transition zone. Particularly strong Moho reflections are observed in the southern half of the main 3D grid. In places, Moho reflection event appears to extend across the ridge axis potentially suggesting "zero-age" Moho development. Weak Moho arrivals are found at the north end of the main 3D box and within the smaller box to the south. Most notable place lacking Moho reflections is the Lamont seamount area where Moho is not observed on either side of the ridge axis, although the area lacking Moho reflections is wider on the western ridge flank. Further south, along the across-ridge-axis swaths, Moho reflections again become more pronounced. A suit of what mostly appear to be reflection events is recognized between the AMC and Moho. Many of them do not appear to be multiples, and their origin is not well understood. Possible origins for these events include: lower boundary of the AMC, S-converted waves, and lower crustal melt lenses. Along sections of the two 3D grids, possible subhorizontal, low signal-to-noise ratio mantle reflections are identified 1-2 s after the Moho reflection. Arrivals potentially originating from lower crustal melt sills, zero-age Moho, and mantle reflections are all of critical importance for understanding fast spreading centers. In the years to follow, we will put significant effort to analyze the identified arrivals in order to determine their origin and find where they fit within the crustal accretionary puzzle.

  3. Geology of the Wilkes Land Sub-basin and Stability of the East Antarctic Ice Sheet: Insights from rock magnetism at IODP Site U1361

    NASA Astrophysics Data System (ADS)

    Tauxe, L.; Sugisaki, S.; Jimenez-Espejo, F. J.; Cook, C. P.; van de Flierdt, T.; Iwai, M.; Escutia, C.

    2014-12-01

    IODP Expedition 318 drilled Site U1361 on the continental rise offshore of the Wilkes sub-glacial basin. The goal was to reconstruct the stability of the East Antarctic Ice Sheet (EAIS) during Neogene warm periods. Teasing out the paleoenvironmental implications is essential for understanding the evolution of the EAIS. Anisotropy of magnetic susceptibility (AMS) is sensitive to differential compaction and other rock magnetic parameters like isothermal remanence and anhysteretic remanence are very sensitive to changes in the terrestrial source region. In general, highly anisotropic layers correspond with laminated clay-rich units, while more isotropic layers are bioturbated and have less clay. Layers enriched in diatoms are associated with the latter, which also have higher Ba/Al ratios indicating higher productivity. Higher anisotropy layers have lower porosity and moisture contents and have fine grained magnetic mineralogy dominated by magnetic. Higher anisotropy layers are dominated by maghemite, supporting the suggestion by Cook et al. (2013) of different source regions during low and high productivity times. They tied the two facies to the coastal outcrops of the Lower Paleozoic granitic terranes and the Ferrar Large Igneous Province in the more inland Wilkes Subglacial Basin respectively. Here we present evidence for a third geological unit, one eroded at the boundaries between the high and low clay zones with a "hard" (hematite) dominated magnetic mineralogy. This unit likely outcrops in the Wilkes sub-glacial basin and could be hydrothermally altered Beacon sandstone similar to that detected by Craw and Findlay (1984) in Taylor Valley or the equivalent to the Elatina Formation in the Adelaide Geosyncline in Southern Australia (Schmidt and Williams, 2013). Cook, C. P., van de Flierdt, T., Williams, T., Hemming, S. R., Iwai, M., Kobayashi, M., Jimenez-Espejo, F., Escutia, C., Gonzalez, J., Khim, B. K., McKay, R., Passchier, S., Bohaty, S., Riesselman, C. R., Tauxe, L., Sugisaki, S., Lopez Galindo, A., Patterson, M. O., Sangiorgi, F., Pierce, E. L., Brinkhuis, H., and Scientists, I. E., 2013, Nature Geoscience, v. 6, p. 765-769. Craw, D., and Findlay, R. H., 1984, New Zealand Jour. Geol. Geophys., v. 27, p. 465-475. Schmidt, P. W., and Williams, G. E., 2013, Global and Planetary Change, v. 110, p. 289-301.

  4. Geology of the Wilkes land sub-basin and stability of the East Antarctic Ice Sheet: Insights from rock magnetism at IODP Site U1361

    NASA Astrophysics Data System (ADS)

    Tauxe, L.; Sugisaki, S.; Jiménez-Espejo, F.; Escutia, C.; Cook, C. P.; van de Flierdt, T.; Iwai, M.

    2015-02-01

    IODP Expedition 318 drilled Site U1361 on the continental rise offshore of Adélie Land and the Wilkes subglacial basin. The objective was to reconstruct the stability of the East Antarctic Ice Sheet (EAIS) during Neogene warm periods, such as the late Miocene and the early Pliocene. The sedimentary record tells a complex story of compaction, and erosion (thus hiatuses). Teasing out the paleoenvironmental implications is essential for understanding the evolution of the EAIS. Anisotropy of magnetic susceptibility (AMS) is sensitive to differential compaction and other rock magnetic parameters like isothermal remanence and anhysteretic remanence are very sensitive to changes in the terrestrial source region. In general, highly anisotropic layers correspond with laminated clay-rich units, while more isotropic layers are bioturbated and have less clay. Layers enriched in diatoms are associated with the latter, which also have higher Ba/Al ratios consistent with higher productivity. Higher anisotropy layers have lower porosity and moisture contents and have fine grained magnetic mineralogy dominated by maghemite, the more oxidized form of iron oxide, while the lower anisotropy layers have magnetic mineralogies dominated by magnetite. The different magnetic mineralogies support the suggestion based on isotopic signatures by Cook et al. (2013) of different source regions during low productivity (cooler) and high productivity (warmer) times. These two facies were tied to the coastal outcrops of the Lower Paleozoic granitic terranes and the Ferrar Large Igneous Province in the more inland Wilkes Subglacial Basin respectively. Here we present evidence for a third geological unit, one eroded at the boundaries between the high and low clay zone with a “hard” (mostly hematite) dominated magnetic mineralogy. This unit likely outcrops in the Wilkes subglacial basin and could be hydrothermally altered Beacon sandstone similar to that detected by Craw and Findlay (1984) in Taylor Valley or the equivalent to the Elatina Formation in the Adelaide Geosyncline in Southern Australia (Schmidt and Williams, 2013). Correlation of the “hard” events with global oxygen isotope stacks of Zachos et al. (2001) and Lisiecki and Raymo (2005) suggest that the source region was eroded during times with higher global ice volume.

  5. Results of 1999 Spectral Gamma-Ray and Neutron Moisture Monitoring of Boreholes at Specific Retention Facilities in the 200 East Area, Hanford Site

    SciTech Connect

    DG Horton; RR Randall

    2000-01-18

    Twenty-eight wells and boreholes in the 200 East Are% Hanford Site, Washington were monitored in 1999. The monitored facilities were past-practice liquid waste disposal facilities and consisted of six cribs and nineteen ''specific retention'' cribs and trenches. Monitoring consisted of spectral gamma-ray and neutron moisture logging. All data are included in Appendix B. The isotopes {sup 137}Cs, {sup 60}Co, {sup 235}U, {sup 238}U, and {sup 154}Eu were identified on spectral gamma logs from boreholes monitoring the PUREX specific retention facilities; the isotopes {sup 137}Cs, {sup 60}Co, {sup 125}Sb, and {sup 154}Eu were identified on the logs from boreholes at the BC Controlled Area cribs and trenches; and {sup 137}Cs, {sup 60}Co, and {sup 125}Sb were, identified on the logs from boreholes at the BX specific retention trenches. Three boreholes in the BC Controlled Area and one at the BX trenches had previous spectral gamma logs available for comparison with 1999 logs. Two of those logs showed that changes in the subsurface distribution of {sup 137}CS and/or {sup 60}Co had occurred since 1992. Although the changes are not great, they do point to continued movement of contaminants in the vadose zone. The logs obtained in 1999 create a larger baseline for comparison with future logs. Numerous historical gross gamma logs exist from most of the boreholes logged. Qualitative comparison of those logs with the 1999 logs show many substantial changes, most of which reflect the decay of deeper short-lived isotopes, such as {sup 106}Ru and {sup 125}Sb, and the much slower decay of shallower and longer-lived isotopes such as {sup 137}Cs. The radionuclides {sup 137}Cs and {sup 60}Co have moved in two boreholes since 1992. Given the amount of movement and the half-lives of the isotopes, it is expected that they will decay to insignificant amounts before reaching groundwater. However, gamma ray logging cannot detect many of the contaminants of interest such as {sup 99}Tc, NO{sub 3}, or {sup 129}I, all of which can be highly mobile in the vadose zone and, for the radionuclides, have long half-lives.

  6. Anomalous decay of electronically stabilized lead mesas on Ni(111).

    PubMed

    Bollmann, Tjeerd R J; van Gastel, Raoul; Zandvliet, Harold J W; Poelsema, Bene

    2011-09-23

    With their low surface free energy, lead films tend to wet surfaces. However, quantum size effects (QSE) often lead to islands with distinct preferred heights. We study thin lead films on Ni(111) using low energy electron microscopy and selected area low energy electron diffraction. Indeed, the grown lead mesas show distinct evidence for QSE's. At about 526 K metastable mesas reshape into hemispheres within milliseconds, driven by a huge reduction in interfacial free energy. The underlying diffusion rate is many orders of magnitude faster than expected for lead on bulk lead. PMID:22026876

  7. Simple estimation of fastest preferential contaminant travel times in the unsaturated zone: application to Rainier Mesa and Shoshone Mountain, Nevada

    NASA Astrophysics Data System (ADS)

    Ebel, B. A.; Nimmo, J. R.

    2010-06-01

    Simulating contaminant transport in unsaturated zones with sparse hydraulic property information is a difficult, yet common, problem. When contaminant transport may occur via preferential flow, simple modeling approaches can provide predictions of interest, such as the first arrival of contaminant, with minimal site characterization. The conceptual model for unsaturated zone flow at two areas within the Nevada Test Site, Rainier Mesa and Shoshone Mountain, establishes the possibility of preferential flow through lithologies between potential radionuclide sources and the saturated zone. Lithology, saturated or near-saturated conditions in portions of the rock matrix, and relatively high recharge rates may act in concert at Rainier Mesa to promote preferential flow, despite the semi-arid climate. After identifying preferential flow as a possible contaminant transport process at Rainier Mesa and Shoshone Mountain, we apply a simple model to estimate fastest unsaturated travel times for conservatively-transported radionuclides to initially reach the saturated zone. Preferential flow travel times at Rainier Mesa are tens to hundreds of years for non-ponded water sources and one to two months for continuously-ponded water sources. If preferential flow occurs at Shoshone Mountain, the fastest travel times are approximately twice the Rainier Mesa estimates. A siliceous rock unit is present at Shoshone Mountain that may provide a barrier to preferential flow; if so, estimated transport times increase to more than a thousand years. Our analysis of unsaturated transport of radionuclides via preferential flow, using a relatively simple model, suggests that contaminated locations associated with continuously-supplied water sources, such as effluent ponds and water-filled tunnels, may have significantly shorter radionuclide travel times than locations not associated with such sources. The simple approach demonstrated here for estimating travel times can be useful in situations where predictions are needed by managers for the fastest arrival of contaminants, yet budgetary or time constraints preclude more rigorous analysis, and when additional model estimates are needed for comparison (i.e. model abstraction).

  8. An Isotopic Investigation of Groundwater Recharge in the East Mesa Area of the Salton Sea Basin

    Microsoft Academic Search

    J. E. Moran; A. F. Tompson; Z. Demir

    2008-01-01

    The Salton Sea Basin, a closed topographic basin located in arid southeastern California and a portion of Baja California, Mexico, is home to some of the most productive agricultural lands in the United States. In the Imperial Valley, in the southern portion of the basin, groundwater use is limited owing to the wide availability of imported water, low urban demand,

  9. M.A.P.S.: Mesa Action Planning System.

    ERIC Educational Resources Information Center

    Larson, Elizabeth J. Hunt

    This report describes implementation of a districtwide planning model in the Mesa, Arizona, Public Schools. Figures illustrate planning processes throughout the report. Intended as an implementive framework, the planning system's purposes are to assist decision making about resource allocation, program direction, progress measurement, and district…

  10. Black Mesa Community School: Ten Years Later. A Progress Report.

    ERIC Educational Resources Information Center

    Black Mesa Community School Board, Inc., Chinle, AZ.

    The Black Mesa Community School, serving elementary school children in an isolated district of the Arizona Navajo reservation, represents the first step in Indian self-determination for area Navajos. The school is the result of community efforts begun in 1972 with a petition to operate a full-time school program for grades K-4 at Kitsilee.…

  11. A Very High Order, Adaptable MESA Implementation for Aeroacoustic Computations

    NASA Technical Reports Server (NTRS)

    Dydson, Roger W.; Goodrich, John W.

    2000-01-01

    Since computational efficiency and wave resolution scale with accuracy, the ideal would be infinitely high accuracy for problems with widely varying wavelength scales. Currently, many of the computational aeroacoustics methods are limited to 4th order accurate Runge-Kutta methods in time which limits their resolution and efficiency. However, a new procedure for implementing the Modified Expansion Solution Approximation (MESA) schemes, based upon Hermitian divided differences, is presented which extends the effective accuracy of the MESA schemes to 57th order in space and time when using 128 bit floating point precision. This new approach has the advantages of reducing round-off error, being easy to program. and is more computationally efficient when compared to previous approaches. Its accuracy is limited only by the floating point hardware. The advantages of this new approach are demonstrated by solving the linearized Euler equations in an open bi-periodic domain. A 500th order MESA scheme can now be created in seconds, making these schemes ideally suited for the next generation of high performance 256-bit (double quadruple) or higher precision computers. This ease of creation makes it possible to adapt the algorithm to the mesh in time instead of its converse: this is ideal for resolving varying wavelength scales which occur in noise generation simulations. And finally, the sources of round-off error which effect the very high order methods are examined and remedies provided that effectively increase the accuracy of the MESA schemes while using current computer technology.

  12. Experience with processes and monitors in Mesa (Summary)

    Microsoft Academic Search

    Butler W. Lampson; David D. Redell

    1979-01-01

    In early 1977 we began to design the concurrent programming facilities of Pilot, a new operating system for a personal computer [5]. Pilot is a fairly large program itself (25,000 lines of Mesa code). In addition, it supports some large applications, ranging from data base management to internetwork message transmission, which are heavy users of concurrency (our experience with some

  13. 75 FR 76951 - Foreign-Trade Zone 86-Tacoma, WA Application for Reorganization Under Alternative Site Framework

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-10

    ...Greenwater Corporate Park, East Valley Highway and 8th Street East, Sumner; Site 11 (185 acres)--Boeing Frederickson parcel, 18001 Canyon Road East, Frederickson; Site 12 (160 acres)--J.R. & F. Randles parcel, 19209 Canyon Road East,...

  14. East Africa

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This image shows the East African nations of Ethiopia, Eritrea, and Somalia, as well as portions of Kenya, Sudan, Yemen, and Saudi Arabia. Dominating the scene are the green Ethiopian Highlands. With altitudes as high as 4,620 meters (15,157 feet), the highlands pull moisture from the arid air, resulting in relatively lush vegetation. In fact, coffee-one of the world's most prized crops-originated here. To the north (above) the highlands is Eritrea, which became independent in 1993. East (right) of Ethiopia is Somalia, jutting out into the Indian Ocean. The Sea-viewing Wide Field-of-view Sensor (SeaWiFS) captured this true-color image on November 29, 2000. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

  15. Middle East

    SciTech Connect

    Hemer, D.O. (Mobil Oil Corp., New York, NY); Mason, J.F.; Hatch, G.C.

    1981-10-01

    Petroleum production in Middle East countries during 1980 totaled 6,747,719,000 bbl or an average rate of 18,436,390,000 bbl/d, down 13.9% from 1979. Increases were in Saudi Arabia and Syria. Significant decreases occurred in Iraq, Iran, Kuwait, and Turkey. New discoveries were made in Abu Dhabi, Iran, Saudi Arabia, Sharjah, and Oman. New areas were explored in Bahrain, Oman, Syria, and Yemen. 9 figures, 16 tables.

  16. Theoretical relationship between SSA and MESA with both application

    Microsoft Academic Search

    Yuguo Ding; Zhihong Jiang

    1998-01-01

    It is theoretically demonstrated that singular spectrum analysis (SSA) is an equivalent form of Maximum Entropy Spectrum Analysis\\u000a (MESA) which is essentially a nonlinear estimation of the classical power spectrum. Both methods have respectively some different\\u000a features in application as a result of the difference of description of manners. The numerical experiments show that SSA possesses\\u000a some special advantage in

  17. Historical Range of Variability for Forest Vegetation of the Grand Mesa National

    E-print Network

    Historical Range of Variability for Forest Vegetation of the Grand Mesa National Forest, Colorado;HISTORICAL RANGE OF VARIABILITY FOR FOREST VEGETATION OF THE GRAND MESA NATIONAL FOREST, COLORADO FINAL and Acknowledgements This assessment of the historic range of variability (HRV) of the forest vegetation of Grand Mesa

  18. 78 FR 18268 - Proposed Establishment of Class E Airspace; Blue Mesa, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-26

    ...establish Class E airspace at the Blue Mesa VHF Omni-Directional...Measuring Equipment (VOR/DME), Blue Mesa, CO to facilitate vectoring...this action may be changed in light of comments received. All comments...feet above the surface at the Blue Mesa VOR/DME, Blue...

  19. 78 FR 34554 - Establishment of Class E Airspace; Blue Mesa, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ...13-ANM-9] Establishment of Class E Airspace; Blue Mesa, CO AGENCY: Federal Aviation Administration...action establishes Class E airspace at Blue Mesa VHF Omni-Directional Radio Range/Distance Measuring Equipment (VOR/DME), Blue Mesa, CO, to facilitate vectoring...

  20. 25. First floor, east wall bathroom, looking east Veterans ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. First floor, east wall bathroom, looking east - Veterans Administration Center, Officers Duplex Quarters, 5302 East Kellogg (Legal Address); 5500 East Kellogg (Common Address), Wichita, Sedgwick County, KS

  1. East Tennessee State University Web Privacy Statement

    E-print Network

    Karsai, Istvan

    East Tennessee State University Web Privacy Statement A Note to Children and Parents East Tennessee through a university Web site is handled. ETSU understands the importance of protecting the privacy of personal information, especially in today's electronic environment. This privacy policy covers the Web

  2. An investigation of sulfur concentrations in soils and pine needles in Mesa Verde National Park, Colorado

    SciTech Connect

    Gladney, E.S.; Ferenbaugh, R.W.; Jones, E.A.; Bell, M.G.; Morgan, J.D.; Nelson, L.A.; Lundstrom, C. [Los Alamos National Lab., NM (United States); Bowker, R.G. [Alma Coll., MI (United States). Dept. of Biology

    1993-03-01

    Sulfur measurements in different age groups of pinon pine needles and adjacent soil samples from ten sampling sites at Mesa Verde National Park were determined using combustion elemental analysis and chromatographic techniques. The primary goal was to establish base-line levels for elemental sulfur in the Park. Sulfur levels in foliage and soils were evaluated using analysis of variance techniques. Foliage sulfur concentrations differed significantly among the 10 sampling sites and among trees within sites; however, needles of different ages did not differ significantly in sulfur content. Average soil concentrations were very low, 17% of the average needle concentrations. Soil sulfur concentrations also differed significantly among the 10 sampling sites and at different depths in the soil. No statistical differences were evident in soils sampled at the four compass points (N, S, E, W) around each tree. These differences imply that large numbers of samples are needed to identify small effects from anthropogenic inputs of sulfur into the system or that the effects must be large relative to the differences among sampling sites and individual trees in order to be detected.

  3. Strain in wet thermally oxidized square and circular mesas

    NASA Astrophysics Data System (ADS)

    Alonzo, A. C.; Cheng, X.-C.; McGill, T. C.

    2000-05-01

    In this paper, we report the observation, through optical microscopy, of drumhead-like patterns in square and circular mesas which have been wet thermally oxidized to completion. Micro-Raman spectroscopy measurements are used to show that these patterns roughly correspond to variations in strain induced in surrounding semiconductor layers by the oxidation process. In addition, the patterns have a specific orientation with respect to the crystallographic axes of the semiconductor. A crystallographic dependence of the oxidation process itself is demonstrated and used to explain the orientation of the drumhead patterns.

  4. Nest-Site Characteristics of Red-bellied and Red-headed Woodpeckers and Northern Flickers in East-Central Ohio1

    Microsoft Academic Search

    Danny J. Ingold

    ABSTRACT. In order to understand more ,clearly what factors limit the reproductive success of primary cavity-nesting birds, it is important to examine and compare the nest-site characteristics of sympatric species in a variety of forest and woodland,habitats. To add to the data already available on various woodpecker species in eastern and central North America, several nest-site and habitat characteristics were

  5. 75 FR 63445 - Foreign-Trade Zone 86-Tacoma, WA; Site Renumbering Notice

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-15

    ...acres)--Greenwater Corporate Park, East Valley Highway, Sumner; Site 11 (185 acres)--Boeing Frederickson parcel, 18001 Canyon Road East, Frederickson; Site 12 (160 acres)--J.R. & F. Randles parcel, 19209 Canyon Road East,...

  6. Land cover change monitoring within the east central Louisiana study site: A case for large area surveys with LANDSAT multispectral scanner data

    NASA Technical Reports Server (NTRS)

    Burns, G. S.

    1983-01-01

    Results established for four digital procedures developed for characterizing the radiometric changes between multidate LANDSAT spectral data sets into meaningful measures of land cover/use dynamics are documented. Each technique's performance was contrasted against digitized land use change maps, which were produced from contemporaneous, retrospective aerophoto coverage, in a cell by cell comparison over a one half by one degree area in east central Louisiana as a standard for comparison. The four techniques identify from 10.5 to 13.0% loss in area of forestland in a five year period; however, they differ more by how accurately this amount of change is distributed, the need for ancillary ground truth, and amount of usable information that is extractable. All require some method of digitally co-registering the two data sets. All are capable of providing tabular statistics as well as map products. Two are capable of detecting changes and identifying their locations. The other two, in addition to this, provide information to qualify land cover conditions at each end of the study interval.

  7. Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions

    E-print Network

    Paxton, Bill; Schwab, Josiah; Bauer, Evan B; Bildsten, Lars; Cantiello, Matteo; Dessart, Luc; Farmer, R; Hu, H; Langer, N; Townsend, R H D; Townsley, Dean M; Timmes, F X

    2015-01-01

    We substantially update the capabilities of the open-source software instrument Modules for Experiments in Stellar Astrophysics (MESA). MESA can now simultaneously evolve an interacting pair of differentially rotating stars undergoing transfer and loss of mass and angular momentum, greatly enhancing the prior ability to model binary evolution. New MESA capabilities in fully coupled calculation of nuclear networks with hundreds of isotopes now allow MESA to accurately simulate advanced burning stages needed to construct supernova progenitor models. Implicit hydrodynamics with shocks can now be treated with MESA, enabling modeling of the entire massive star lifecycle, from pre-main sequence evolution to the onset of core collapse and nucleosynthesis from the resulting explosion. Coupling of the GYRE non-adiabatic pulsation instrument with MESA allows for new explorations of the instability strips for massive stars while also accelerating the astrophysical use of asteroseismology data. We improve treatment of ma...

  8. Gravity and magnetic study of the Pahute Mesa and Oasis Valley region, Nye County, Nevada

    USGS Publications Warehouse

    Mankinen, Edward A.; Hildenbrand, Thomas G.; Dixon, Gary L.; McKee, Edwin H.; Fridrich, Christopher J.; Laczniak, Randell J.

    1999-01-01

    Regional gravity and aeromagnetic maps reveal the existence of deep basins underlying much of the southwestern Nevada volcanic field, approximately 150 km northwest of Las Vegas. These maps also indicate the presence of prominent features (geophysical lineaments) within and beneath the basin fill. Detailed gravity surveys were conducted in order to characterize the nature of the basin boundaries, delineate additional subsurface features, and evaluate their possible influence on the movement of ground-water. Geophysical modeling of gravity and aeromagnetic data indicates that many of the features may be related to processes of caldera formation. Collapse of the various calderas within the volcanic field resulted in dense basement rocks occurring at greater depths within caldera boundaries. Modeling indicates that collapse occurred along faults that are arcuate and steeply dipping. There are indications that the basement in the western Pahute Mesa - Oasis Valley region consists predominantly of granitic and/or fine-grained siliceous sedimentary rocks that may be less permeable to groundwater flow than the predominantly fractured carbonate rock basement to the east and southeast of the study area. The northeast-trending Thirsty Canyon lineament, expressed on gravity and basin thickness maps, separates dense volcanic rocks on the northwest from less dense intracaldera accumulations in the Silent Canyon and Timber Mountain caldera complexes. The source of the lineament is an approximately 2-km wide ring fracture system with step-like differential displacements, perhaps localized on a pre-existing northeast-trending Basin and Range fault. Due to vertical offsets, the Thirsty Canyon fault zone probably juxtaposes rock types of different permeability and, thus, it may act as a barrier to ground-water flow and deflect flow from Pahute Mesa along its flanks toward Oasis Valley. Within the Thirsty Canyon fault zone, highly fractured rocks may serve also as a conduit, depending upon the degree of alteration and its effect on porosity and permeability. In the Oasis Valley region, other structures that may influence ground-water flow include the western and southern boundaries of the Oasis Valley basin, where the basement abruptly shallows.

  9. Gravity and magnetic study of the Pahute Mesa and Oasis Valley region, Nye County, Nevada

    SciTech Connect

    Dixon, G.L.; Fridrich, C.J.; Hildenbrand, T.G.; Laczniak, R.J.; Mankinen, E.A.; McKee, E.H.

    1999-08-31

    Regional gravity and aeromagnetic maps reveal the existence of deep basins underlying much of the southwestern Nevada volcanic field, approximately 150 km northwest of Las Vegas. These maps also indicate the presence of prominent features (geophysical lineaments) within and beneath the basin fill. Detailed gravity surveys were conducted in order to characterize the nature of the basin boundaries, delineate additional subsurface features, and evaluate their possible influence on the movement of ground water. Geophysical modeling of gravity and aeromagnetic data indicates that many of the features may be related to processes of caldera formation. Collapse of the various calderas within the volcanic field resulted in dense basement rocks occurring at greater depths within caldera boundaries. Modeling indicates that collapse occurred along faults that are arcuate and steeply dipping. There are indications that the basement in the western Pahute Mesa - Oasis Valley region consists predominantly of granitic and/or fine-grained siliceous sedimentary rocks that may be less permeable to ground-water flow than the predominantly fractured carbonate rock basement to the east and southeast of the study area. The northeast-trending Thirsty Canyon lineament, expressed on gravity and basin thickness maps, separates dense volcanic rocks on the northwest from less dense intracaldera accumulations in the Silent Canyon and Timber Mountain caldera complexes. The sources of the lineament is an approximately 2-km wide ring fracture system with step-like differential displacements, perhaps localized on a pre-existing northeast-trending Basin and Range fault. Due to vertical offsets, the Thirsty Canyon faults zone probably juxtaposes rock types of different permeability and, thus, it may act as a barrier to ground-water flow and deflect flow from Pahute Mesa along its flanks toward Oasis Valley. Within the Thirsty Canyon fault zone, highly fractured rocks may serve also as a conduit, depending upon the degree of alteration and its effect on porosity and permeability. In the Oasis Valley region, other structures that may influence ground-water flow include the western and southern boundaries of the Oasis Valley basin, where the basement abruptly shallows.

  10. Site characterization summary report for dry weather surface water sampling upper East Fork Poplar Creek characterization area Oak Ridge Y-12 Plant, Oak Ridge, Tennessee

    SciTech Connect

    NONE

    1996-08-01

    This report describes activities associated with conducting dry weather surface water sampling of Upper East Fork Poplar Creek (UEFPC) at the Oak Ridge Y-12 Plant, Oak Ridge, Tennessee. This activity is a portion of the work to be performed at UEFPC Operable Unit (OU) 1 [now known as the UEFPC Characterization Area (CA)], as described in the RCRA Facility Investigation Plan for Group 4 at the Oak- Ridge Y-12 Plant, Oak Ridge, Tennessee and in the Response to Comments and Recommendations on RCRA Facility Investigation Plan for Group 4 at the Oak Ridge Y-12 Plant, Oak Ridge, Tennessee, Volume 1, Operable Unit 1. Because these documents contained sensitive information, they were labeled as unclassified controlled nuclear information and as such are not readily available for public review. To address this issue the U.S. Department of Energy (DOE) published an unclassified, nonsensitive version of the initial plan, text and appendixes, of this Resource Conservation and Recovery Act (RCRA) Facility Investigation (RFI) Plan in early 1994. These documents describe a program for collecting four rounds of wet weather and dry weather surface water samples and one round of sediment samples from UEFPC. They provide the strategy for the overall sample collection program including dry weather sampling, wet weather sampling, and sediment sampling. Figure 1.1 is a schematic flowchart of the overall sampling strategy and other associated activities. A Quality Assurance Project Plan (QAPJP) was prepared to specifically address four rounds of dry weather surface water sampling and one round of sediment sampling. For a variety of reasons, sediment sampling has not been conducted and has been deferred to the UEFPC CA Remedial Investigation (RI), as has wet weather sampling.

  11. Characterization of Preferential Flowpaths at the T-Tunnel Complex, Rainier Mesa, Nevada

    NASA Astrophysics Data System (ADS)

    Reeves, D. M.; Schultz, R.; Bingham, C.; Pohlmann, K.; Russell, C.; Chapman, J.

    2007-12-01

    Rainier Mesa (RM), a tuffaceous plateau on the Nevada Test Site, has been the location of numerous subsurface nuclear tests. The tests were conducted in a series of tunnel complexes located approximately 450 m below the top of the mesa and 1000 m above the regional ground water flow system. The tunnels were constructed near the middle of a 690 m sequence of low-permeability bedded and non-welded vitric and zeolitized tuff units. Though these tuff units are nearly saturated, active ground water flow is restricted to perched lenses occurring within poorly connected normal faults linked to recharge pathways. The perched systems vary from 100 to 150 m above the tunnel complexes which suggests that the now-sealed tunnels could enhance connectivity between otherwise isolated preferential flow pathways. This work represents the first stage of radionuclide transport investigations for the T-tunnel complex at RM: the characterization and stochastic generation of preferential pathways based on fault and joint data collected along tunnel transects. Analysis of fault and joint orientations demonstrate that fractures at RM are steeply-dipping and trend approximately NE-SW. A higher degree of spread about the mean strike relative to the mean dip direction results in an elliptical distribution of fracture orientation. A novel method based on a bivariate normal is used as an alternative to the Fisher distribution to generate fracture orientations. The spatial distribution of fractures along transects indicates fractal clustering (D=0.3) with a power-law distribution of fracture spacing (?=1.1). Fault displacement data are used in conjunction with mechanical models of fault growth to infer both the length and vertical extent of large faults. Major faults are deterministic features in the model domain, while a cascade process is used to govern the spatial distribution of background fractures. Assessment of methods for assigning hydraulic conductivity values to the joints and faults are underway.

  12. 40 CFR 81.173 - Grand Mesa Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...delimited): In the State of Colorado: Delta County, Eagle County, Garfield County, Gunnison County, Hinsdale County, Mesa County, Montrose County, Ouray County, Pitkin County, San Miguel County, Summit...

  13. 40 CFR 81.173 - Grand Mesa Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...delimited): In the State of Colorado: Delta County, Eagle County, Garfield County, Gunnison County, Hinsdale County, Mesa County, Montrose County, Ouray County, Pitkin County, San Miguel County, Summit...

  14. 40 CFR 81.173 - Grand Mesa Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...delimited): In the State of Colorado: Delta County, Eagle County, Garfield County, Gunnison County, Hinsdale County, Mesa County, Montrose County, Ouray County, Pitkin County, San Miguel County, Summit...

  15. 40 CFR 81.173 - Grand Mesa Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...delimited): In the State of Colorado: Delta County, Eagle County, Garfield County, Gunnison County, Hinsdale County, Mesa County, Montrose County, Ouray County, Pitkin County, San Miguel County, Summit...

  16. 40 CFR 81.173 - Grand Mesa Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...delimited): In the State of Colorado: Delta County, Eagle County, Garfield County, Gunnison County, Hinsdale County, Mesa County, Montrose County, Ouray County, Pitkin County, San Miguel County, Summit...

  17. MESAFace, a graphical interface to analyze the MESA output

    NASA Astrophysics Data System (ADS)

    Giannotti, M.; Wise, M.; Mohammed, A.

    2013-04-01

    MESA (Modules for Experiments in Stellar Astrophysics) has become very popular among astrophysicists as a powerful and reliable code to simulate stellar evolution. Analyzing the output data thoroughly may, however, present some challenges and be rather time-consuming. Here we describe MESAFace, a graphical and dynamical interface which provides an intuitive, efficient and quick way to analyze the MESA output. Catalogue identifier: AEOQ_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEOQ_v1_0.html Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 19165 No. of bytes in distributed program, including test data, etc.: 6300592 Distribution format: tar.gz Programming language: Mathematica. Computer: Any computer capable of running Mathematica. Operating system: Any capable of running Mathematica. Tested on Linux, Mac, Windows XP, Windows 7. RAM: Recommended 2 Gigabytes or more. Supplementary material: Additional test data files are available. Classification: 1.7, 14. Nature of problem: Find a way to quickly and thoroughly analyze the output of a MESA run, including all the profiles, and have an efficient method to produce graphical representations of the data. Solution method: We created two scripts (to be run consecutively). The first one downloads all the data from a MESA run and organizes the profiles in order of age. All the files are saved as tables or arrays of tables which can then be accessed very quickly by Mathematica. The second script uses the Manipulate function to create a graphical interface which allows the user to choose what to plot from a set of menus and buttons. The information shown is updated in real time. The user can access very quickly all the data from the run under examination and visualize it with plots and tables. Unusual features: Moving the slides in certain regions may cause an error message. This happens when Mathematica is asked to read nonexistent data. The error message, however, disappears when the slides are moved back. This issue does not preclude the good functioning of the interface. Additional comments: The program uses the dynamical capabilities of Mathematica. When the program is opened, Mathematica prompts the user to “Enable Dynamics”. It is necessary to accept before proceeding. Running time: Depends on the size of the data downloaded, on where the data are stored (hard-drive or web), and on the speed of the computer or network connection. In general, downloading the data may take from a minute to several minutes. Loading directly from the web is slower. For example, downloading a 200 MB data folder (a total of 102 files) with a dual-core Intel laptop, P8700, 2 GB of RAM, at 2.53 GHz took about a minute from the hard-drive and about 23 min from the web (with a basic home wireless connection).

  18. 3D multi-channel seismic imaging of melt-rich lenses beneath and off the East Pacific Rise Integrated Study Site

    NASA Astrophysics Data System (ADS)

    Xu, M.; Canales, J.; Carton, H. D.; Carbotte, S. M.; Nedimovic, M. R.; Mutter, J. C.

    2010-12-01

    Melt has a particularly strong effect on shear velocity, and therefore affects the amplitude versus offset behavior of P- and S-converted waves reflected off a crustal melt lens. The first 3D multi-streamer seismic reflection experiment conducted aboard R/V Langseth (Cruise MGL0812) collected a very dense dataset along and across the northern East Pacific Rise (EPR, ~9°34'N-9°58'N). In addition to P waves reflecting off the top of the axial magma chamber (AMC), this dataset contains evidence for the S-converted phase PAMCS, which allows us to qualitatively image melt-rich sections of the AMC (i.e., portions of the melt lens in which crystals are disconnected and cannot transmit shear stresses) by producing and comparing P- and S-wave partial-offset stacks. Reflection images obtained from a subset of data collected along the ridge crest between 9°42'N-9°54'N show a prominent melt-rich zone at ~9°42'N-9°44'N, ~10-12 km to the south of the southern end of the 2005-06 volcanic eruption. The preliminary images also show evidence for two other melt-rich sections where abundant hydrothermal activity has been documented: at ~9°47'N-9°48'N (southern edge of the 2005-06 eruption), and at ~9°50'N-9°52'N (near the center of the 2005-06 eruption), although data from these two areas require more analysis to confirm this finding. The melt-rich zones are ~2-4 km long and spaced every ~10-15 km along the ridge axis. We will also present results from data collected over melt lenses located several kilometers off-axis (see Canales et al., this meeting). This high resolution imaging of the distribution of crustal melt bodies and correlation with seafloor hydrothermal and biological activity will provide a key piece of information that is currently missing from our knowledge of the EPR mantle-to-microbe system.

  19. Ancient Near East.net

    NSDL National Science Digital Library

    The ancient Near East has been the birthplace of some of civilization's most important advances, among them written language, the impulse to urbanism, and crop cultivation. Created and maintained by Paul James Cowie (a doctoral student at Australia's Macquarie University), the site is a fine resource for both scholars and the general public. Scholars will want to make sure and take a look at the conference diary section, which lists upcoming conferences and various calls for papers and other submissions. The announcements section is of additional interest, as it gives advance notice regarding related activities, including international symposia. For the general public, a host of sections (such as museums and galleries) offer comprehensive listings of Web-based resources ranging from Egyptology links to those dealing with cuneiform. The Web site also contains a listing of links to museums that specialize in the antiquities and archaeology of the Near East located around the world.

  20. Phytoremediation of Pb, Zn, Fe, and Mg with 25 wetland plant species from a paper mill contaminated site in North East India.

    PubMed

    Mazumdar, Kisholay; Das, Suchismita

    2015-01-01

    In order to assess the potential of wetland plants to remediate metals from a paper mill effluent contaminated wetland site in Northeast India, 25 abundant plant species belonging to 15 different families, soil, and water samples from the sites were tested for Pb, Zn, Mg, and Fe by atomic absorption spectrophotometer. The results showed that metal accumulation by wetland plants differed among species and tissues. Plants thrived in high Pb, Zn, Mg, and Fe which indicated their tolerance. According to the criteria used for selecting plants for phytoremediation such as high metal tolerance, short life cycle, wide distribution, large shoot biomass and translocation factor (TF) >1; five species each were Mg and Fe accumulators, nine species were Pb accumulators and, eight species were Zn accumulators and the rest were excluders. Alternanthera sessilis was the only plant species that had TF?>?1 for all the four metals. The study indicated great promise for phytoremediation, as these accumulators could be used in future for practical phytoremediation approaches and reduction of the risk from harmful metals to human health. PMID:25103945

  1. East-West Center

    NSDL National Science Digital Library

    Started in 1960 by the U.S. Congress, the East-West Center's primary purpose is "to strengthen relations and understanding among the peoples and nations of Asia, the Pacific, and the United States." To accomplish this purpose, the Center serves as a functional hub for education, cooperative research, and scholarly dialogue. On their homepage, visitors can look over the latest news from scholars at the Center, look over a list of upcoming events sponsored by the Center, and also learn about some of their most recent publications. Academics visiting the site may wish to click on over to the "Research" area. Here they will find information on their primary areas of interest, which include population and health, environmental change, and politics and governance. Finally, visitors should look at their "Publications" area, as it includes free downloads, abstracts, and access to ordering information.

  2. The East Anglian Eye Bank.

    PubMed

    Knights, P

    1991-07-01

    The first Corneal Bank in East Anglia is located at the BUPA Hospital in Norwich, a joint venture between NHS, BUPA and the Lions Clubs International (District 101 EA). There was insufficient space to accommodate the Bank at the West Norwich Hospital where the Ophthalmic Department is situated and so, at the suggestion of the BUPA Hospital Manager, Mr Paul Hanke, It came to the BUPA Colney Lane site. PMID:1802078

  3. 2010 Google -Map data 2010 Google -Driving directions to 1850 Table Mesa Dr, Boulder, CO 80305

    E-print Network

    ©2010 Google - Map data ©2010 Google - Driving directions to 1850 Table Mesa Dr, Boulder, CO 80305 obey all signs or notices regarding your route. Map data ©2010 Google Report a problem Print Send Link, CO 80305 to 1850 Table Mesa... http://maps.google.com/maps?f=d&source=s_d&saddr=32... 1 of 1 9

  4. Rotarians Respond to the Recreation Rights of Disabled Individuals in Mesa, Arizona.

    ERIC Educational Resources Information Center

    Bliss, George, II; And Others

    1983-01-01

    Presents Rotary Park in Mesa (Arizona), designed to be accessible to the disabled and developed by the Mesa Rotary Club, the city parks and recreation department, and county and federal agencies. Describes the park's origins, development, and special recreational equipment, including a physical fitness trail and multipurpose playing areas. (RW)

  5. The Implementation of Career Education through the Mesa Center for Career Development.

    ERIC Educational Resources Information Center

    Booth, George, Comp.

    Efforts of the Center for Career Development (Mesa, Arizona) to compare various strategies for promoting available career education materials and services in the Mesa Public Schools (to determine which strategies are more effective in increasing utilization of career education resources) are described. After identifying the career education…

  6. MESA: Supporting Teaching and Learning about the Marine Environment--Primary Science Focus

    ERIC Educational Resources Information Center

    Preston, Christine

    2010-01-01

    The Marine Education Society of Australasia (MESA) Inc. is a national organisation of marine educators that aims to bring together people interested in the study and enjoyment of coastal and marine environments. MESA representatives and members organise education and interpretation activities in support of schools and communities during a number…

  7. Availability, Sustainability, and Suitability of Ground Water, Rogers Mesa, Delta County, Colorado - Types of Analyses and Data for Use in Subdivision Water-Supply Reports

    USGS Publications Warehouse

    Watts, Kenneth R.

    2008-01-01

    The population of Delta County, Colorado, like that in much of the Western United States, is forecast to increase substantially in the next few decades. A substantial portion of the increased population likely will reside in rural subdivisions and use residential wells for domestic water supplies. In Colorado, a subdivision developer is required to submit a water-supply plan through the county for approval by the Colorado Division of Water Resources. If the water supply is to be provided by wells, the water-supply plan must include a water-supply report. The water-supply report demonstrates the availability, sustainability, and suitability of the water supply for the proposed subdivision. During 2006, the U.S. Geological Survey, in cooperation with Delta County, Colorado, began a study to develop criteria that the Delta County Land Use Department can use to evaluate water-supply reports for proposed subdivisions. A table was prepared that lists the types of analyses and data that may be needed in a water-supply report for a water-supply plan that proposes the use of ground water. A preliminary analysis of the availability, sustainability, and suitability of the ground-water resources of Rogers Mesa, Delta County, Colorado, was prepared for a hypothetical subdivision to demonstrate hydrologic analyses and data that may be needed for water-supply reports for proposed subdivisions. Rogers Mesa is a 12-square-mile upland mesa located along the north side of the North Fork Gunnison River about 15 miles east of Delta, Colorado. The principal land use on Rogers Mesa is irrigated agriculture, with about 5,651 acres of irrigated cropland, grass pasture, and orchards. The principal source of irrigation water is surface water diverted from the North Fork Gunnison River and Leroux Creek. The estimated area of platted subdivisions on or partially on Rogers Mesa in 2007 was about 4,792 acres of which about 2,756 acres was irrigated land in 2000. The principal aquifer on Rogers Mesa consists of alluvial-fan deposits that overlie shale and, locally, sandstone. Maps of the base of the aquifer, the water table, and the saturated thickness of the aquifer were prepared from data from the well files of the Colorado Division of Water Resources. The base of the aquifer generally is topographically higher than the valleys of the North Fork Gunnison River and Leroux Creek, and direct hydraulic connection of the aquifer to North Fork Gunnison River and Leroux Creek is limited. The aquifer is recharged primarily by infiltration of surface water diverted for irrigation. Ground water discharges to seeps and springs and through slope deposits at the boundaries of the aquifer. Data from the well files also were used to estimate the specific capacity of wells and to estimate the transmissivity and hydraulic conductivity of the aquifer. A water budget was used to estimate recharge to and discharge from the aquifer. Although storage within the aquifer likely varies seasonally and from year to year, it was assumed that there were no long-term changes in ground-water storage. Estimated average annual recharge to and discharge from the aquifer during November 1998 through October 2006 were about 30,767 acre-feet per year. Although sufficient ground water is available on Rogers Mesa for additional domestic water supplies, conversion of irrigated land to residential land use likely would reduce recharge to the aquifer, affecting the sustainability of ground-water supplies on Rogers Mesa. Stream-depletion analyses indicate that the ground water in the aquifer likely would be considered tributary ground water and additional uses of ground water to supply new subdivisions likely would require implementation of augmentation plans. Although sufficient ground water is available on Rogers Mesa for additional domestic water supplies, conversion of irrigated land to residential land use likely would reduce recharge to the aquifer, affecting the sustainability

  8. Seasonal variations of stable carbon isotopic composition of bulk aerosol carbon from Gosan site, Jeju Island in the East China Sea

    NASA Astrophysics Data System (ADS)

    Kundu, Shuvashish; Kawamura, Kimitaka

    2014-09-01

    This study explores the usefulness of stable isotopic composition (?13C) along with other chemical tracers and air mass trajectory to identify the primary and secondary sources of carbonaceous aerosols. Aerosol samples (n = 84) were collected continuously from April 2003 to April 2004 at Gosan site in Jeju Island, South Korea. The concentrations of total carbon (TC), HCl fumed carbonate-free total carbon (fumed-TC) and their ?13C were measured online using elemental analyzer interfaced to isotope ratio mass spectrometer (EA-IRMS). Similar concentrations of TC and fumed-TC and their similar ?13C values suggest the insignificant contribution of inorganic carbon to Gosan aerosols. The monthly averaged ?13CTC showed the lowest in April/May (-24.2 to -24.4‰), which is related with the highest concentrations of oxalic acid (a secondary tracer). The result indicates an enhanced contribution of TC from secondary sources. The monthly averaged ?13CTC in July/August (-23.0 to -22.5‰) were similar to those in January/February (-23.1‰ to -22.7‰). However, chemical tracers and air mass transport pattern suggest that the pollution source regions in January/February are completely different from those in July/August. Higher ?13C values in July/August are aligned with higher concentration ratios of marine tracers (azelaic acid/TC and methanesulfonate/TC), suggesting an enhanced contribution of marine organic matter to the aerosol loading. Higher ?13C values in January/February are associated with higher concentrations of phthalic acid and K+/TC, indicating more contributions of carbonaceous aerosols from fossil fuel and C4-plant biomass combustion. This study demonstrates that ?13CTC, along with other chemical tracers and air mass trajectory, can be used as a tracer to understand the importance of primary versus secondary pollution sources of carbonaceous aerosols in the atmosphere.

  9. Hybrid superconducting mesa-heterostructure with manganite-ruthenate interlayer

    NASA Astrophysics Data System (ADS)

    Constantinian, K. Y.; Ovsyannikov, G. A.; Sheyerman, A. E.; Shadrin, A. V.; Kislinskii, Y. V.; Kalabukhov, A.; Winkler, D.

    2014-05-01

    We present experimental data on Josephson effect in hybrid superconducting mesa-heterostructures (HSMH) with composite manganite-ruthenate interlayer. The HSMH base electrode consisted of the cuprate superconductor YBa2Cu3O7 grown epitaxially on a NdGaO substrate using laser ablation. The interlayer was composed from in-situ deposited SrRuO3 (F1) and La0.7Sr0.3MnO3 (F2) thin films, each characterized by different directions of magnetization. The top electrode was Nb/Au thin film. A superconducting current was observed when the interlayer thickness was well above the correlation length, determined by the exchange field in F1 and F2. Obtained IC(H) dependences and non-sinusoidal current-phase relation evaluated from microwave measurements are discussed in terms of generation of long-range spin triplet superconducting current component in heterostructures with interfaces of singlet superconductors and bilayer ferromagnetic materials with different spatial directions of magnetization.

  10. Geology, geochronology, and geochemistry of basaltic flows of the Cat Hills, Cat Mesa, Wind Mesa, Cerro Verde, and Mesita Negra, central New Mexico

    USGS Publications Warehouse

    Maldonado, F.; Budahn, J.R.; Peters, L.; Unruh, D.M.

    2006-01-01

    The geochronology, geochemistry, and isotopic compositions of basaltic flows erupted from the Cat Hills, Cat Mesa, Wind Mesa, Cerro Verde, and Mesita Negra volcanic centres in central New Mexico indicate that each of these lavas had unique origins and that the predominant mantle involved in their production was an ocean-island basalt type. The basalts from Cat Hills (0.11 Ma) and Cat Mesa (3.0 Ma) are similar in major and trace element composition, but differences in MgO contents and Pb isotopic values are attributed to a small involvement of a lower crustal component in the genesis of the Cat Mesa rocks. The Cerro Verde rock is comparable in age (0.32 Ma) to the Cat Hills lavas, but it is more radiogenic in Sr and Nd, has higher MgO contents, and has a lower La/Yb ratio. This composition is explained by the melting of an enriched mantle source, but the involvement of another crustal component cannot be disregarded. The Wind Mesa rock is characterized by similar age (4.01 Ma) and MgO contents, but it has enriched rare-earth element contents compared with the Cat Mesa samples. These are attributed to a difference in the degree of partial melting of the Cat Mesa source. The Mesita Negra rock (8.11 Ma) has distinctive geochemical and isotopic compositions that suggest a different enriched mantle and that large amounts of a crustal component were involved in generating this magma. These data imply a temporal shift in magma source regions and crustal involvement, and have been previously proposed for Rio Grande rift lavas. ?? 2006 NRC Canada.

  11. 37. PRATER CANYON AND CIVILIAN CONSERVATION CORPS CAMP SITE FROM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    37. PRATER CANYON AND CIVILIAN CONSERVATION CORPS CAMP SITE FROM PRATER GRADE, FACING E. SAME CAMERA LOCATION AS No. 35 AND No. 36. - Mesa Verde National Park Main Entrance Road, Cortez, Montezuma County, CO

  12. Al Bawaba: The Middle East Gateway

    NSDL National Science Digital Library

    Available in both Arabic and English, this gateway links users to a wide variety of sites and resources from and about the Middle East. The heart of the site is the Webguide, which contains briefly annotated links organized by topic and category. These include Education & Academia, News & Media, References & Resources, and Culture & Society. Among the numerous additional resources at the site are news headlines, a business portal, travel information, and forums.

  13. The Confluence of Gangis and Eos Chasmas (5-12 deg S, 31-41 deg W): Geologic, Hydrologic, and Exobiologic Considerations for Landing Site at the East End of Valles Marineris

    NASA Technical Reports Server (NTRS)

    George, J. A.; Clifford, S. M.

    1999-01-01

    Over its 3,500 km length, Valles Marineris exhibits an enormous range of geologic and environmental diversity. At its western end, the canyon is dominated by the tectonic complex of Noctis Labyrinthus; while in the east it grades into an extensive region of chaos where scoured channels and streamlined islands provide evidence of catastrophic floods that spilled into the northern plains. In the central portion of the system, debris derived from the massive interior layered deposits of Candor and Ophir Chasmas spills into the central trough. In other areas, 6 km-deep exposures of Hesperian and Noachian-age canyon wall stratigraphy have collapsed in massive landslides that extend many tens of kilometers across the canyon floor. Ejecta from interior craters, aeolian sediments, and possible volcanics emanating from structurally controlled vents along the base of the scarps, further contribute to the canyon's geologic complexity. Following the initial rifting that gave birth to Valles Marineris, water appears to have been a principal agent in the canyon's geomorphic development an agent whose significance is given added weight by its potential role in both sustaining and preserving evidence of past life. In this regard, the interior layered deposits of Candor, Ophir, and Hebes Chasmas, have been identified as possible lucustrine sediments that may have been laid down in long-standing ice-covered lakes. The potential survival and growth of native organisms in such an environment, or in the aquifers whose disruption gave birth to the chaotic terrain and outflow channels to the north and east of the canyon, raises the possibility that fossil indicators of life may be present in the local sediment and rock. Because of the enormous distances over which these diverse environments occur, identifying a single landing site that maximizes the opportunity for scientific return is not a simple task. However, given the fluvial history and narrow geometry of the canyon, the presence of a single exit at its eastern end provides an opportunity for sampling that appears unequaled elsewhere in the system.

  14. The Confluence of Gangis and Eos Chasmas (5-12 deg S, 31-41 deg W): Geologic, Hydrologic, and Exobiologic Considerations for Landing Site at the East End of Valles Marineris

    NASA Astrophysics Data System (ADS)

    George, J. A.; Clifford, S. M.

    1999-06-01

    Over its 3,500 km length, Valles Marineris exhibits an enormous range of geologic and environmental diversity. At its western end, the canyon is dominated by the tectonic complex of Noctis Labyrinthus; while in the east it grades into an extensive region of chaos where scoured channels and streamlined islands provide evidence of catastrophic floods that spilled into the northern plains. In the central portion of the system, debris derived from the massive interior layered deposits of Candor and Ophir Chasmas spills into the central trough. In other areas, 6 km-deep exposures of Hesperian and Noachian-age canyon wall stratigraphy have collapsed in massive landslides that extend many tens of kilometers across the canyon floor. Ejecta from interior craters, aeolian sediments, and possible volcanics emanating from structurally controlled vents along the base of the scarps, further contribute to the canyon's geologic complexity. Following the initial rifting that gave birth to Valles Marineris, water appears to have been a principal agent in the canyon's geomorphic development an agent whose significance is given added weight by its potential role in both sustaining and preserving evidence of past life. In this regard, the interior layered deposits of Candor, Ophir, and Hebes Chasmas, have been identified as possible lucustrine sediments that may have been laid down in long-standing ice-covered lakes. The potential survival and growth of native organisms in such an environment, or in the aquifers whose disruption gave birth to the chaotic terrain and outflow channels to the north and east of the canyon, raises the possibility that fossil indicators of life may be present in the local sediment and rock. Because of the enormous distances over which these diverse environments occur, identifying a single landing site that maximizes the opportunity for scientific return is not a simple task. However, given the fluvial history and narrow geometry of the canyon, the presence of a single exit at its eastern end provides an opportunity for sampling that appears unequaled elsewhere in the system.

  15. 77 FR 53884 - High Mesa Energy, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes Request...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-04

    ...DEPARTMENT OF ENERGY Federal Energy Regulatory Commission...ER12-2528-000] High Mesa Energy, LLC; Supplemental Notice That Initial Market- Based Rate Filing...proceeding, of High Mesa Energy, LLC's application for market-based rate...

  16. Analysis of tracer responses in the BULLION Forced-Gradient Experiment at Pahute Mesa, Nevada

    SciTech Connect

    Paul W. Reimus; Marc J. Haga

    1999-10-01

    This report presents an analysis of the tracer data from the BULLION forced-gradient experiment (FGE) conducted on Pahute Mesa at the Nevada Test Site from June 2, 1997 through August 28, 1997, for the Underground Test Area (UGTA) Program. It also serves to document the polystyrene microsphere data from the FGE. The FGE involved the injection of solute and colloid tracers into wells ER-20-6 No. 1 and ER-20-6 No. 2 while ER-20-6 No. 3 was pumped at approximately 116 gallons per minute (gpm). The experimental configuration and test design are described briefly in this report; more details are provided elsewhere (IT, 1996, 1997, 1998). The tracer responses in the various wells yielded valuable information about transport processes such as longitudinal dispersion, matrix diffusion and colloid transport in the hydrogeologic system in the vicinity of the BULLION nuclear test cavity. Parameter values describing these processes are derived from the semi-analytical model interpretations presented in this report. A companion report (IT, 1998) presents more detailed numerical modeling interpretations of the solute tracer responses.

  17. Ground-water resources of the Florida Mesa area, La Plata County, Colorado

    USGS Publications Warehouse

    Robson, S.G.; Wright, W.G.

    1995-01-01

    Rapid population growth in La Plata County, Colorado, has increased the demand for ground water in the Florida Mesa area. This report was prepared in cooperation with La Plata County to provide needed information about the geology, extent, thickness, and depth of the aquifers in the area; sources of ground-water recharge and discharge; direction of ground-water movement; water-level changes; and water quality in the alluvial and bedrock aquifers. Ground water in the study area is present in bedrock formations and in terrace deposits on Florida Mesa. Porous or fractured sandstone beds that contain bedrock aquifers are present near land surface along the northern margin of the study area and are present at depths less than 3,000 feet throughout the study area. Terrace deposits as much as 200 feet thick and consisting of gravel, sand, silt, and clay are present on Florida Mesa. The terrace deposits and the upper part of the underlying Animas and Nacimiento Formations form the principal aquifer under the mesa. Ground water under the mesa is supplied from precipitation and irrigation water. A small part of the precipitation and irrigation water on the mesa percolates to depth in the soil and recharges the aquifer. Irrigation water is the largest source of this recharge. Water levels in the aquifer can decline because of a reduction in irrigation recharge, or because of an increase in well pumping. Because irrigation recharge is so much larger than pumping, changes in recharge can have a much larger effect on ground-water levels than can changes in pumping. Factors that tend to increase ground-water recharge and thereby increase or maintain ground- water levels include: maintaining large rates of surface-water diversion onto Florida Mesa, reducing surface flow off the mesa, increasing use of ponds and spreading basins to promote infiltration, and irrigating by use of flood irrigation. The general direction of ground-water movement on the mesa is from the northern part of the mesa to the south, southwest, and southeast. Most ground water discharges from the mesa to the Animas and Florida Rivers through seeps and springs along the margin of the mesa. Winter water levels in wells generally are lower than summer water levels because of the lack of irrigation recharge during the fall and winter. Potable water of low dissolved-solids concentration is present in the shallow parts of most aquifers.

  18. Quick and reliable technology for fabrication of stand-alone BSCCO mesas

    NASA Astrophysics Data System (ADS)

    Vopilkin, E. A.; Chiginev, A. V.; Revin, L. S.; Tropanova, A. N.; Shuleshova, I. Yu; Okhapkin, A. I.; Shovkun, A. D.; Kulakov, A. B.; Pankratov, A. L.

    2015-04-01

    The technology of wet etching allowing fabrication of stand-alone BSCCO mesa structures was proposed. The produced mesas can be made much thicker than ones usually being studied. The time required for the fabrication is much smaller in comparison with the standard method of ion milling. The process used is controllable which provides acceptable precision of mesa fabrication. The IV characteristics of the sample showing Josephson nature were obtained. The qualitative comparison with characteristics of similar structures fabricated by other groups was carried out.

  19. The Hopi and the Black Mesa: An Argument for Protection of Sacred Water Sites

    E-print Network

    Grimes, Tamisha

    2008-07-28

    Numerous studies have documented the dropping water levels in Hopi sacred springs. From 1966 to 2005, Peabody Coal Mining Company has continually used the water located directly under the Hopi reservation. The use of water for religious and cultural...

  20. LONG-TERM EFFECTS OF LAND APPLICATION OF DOMESTIC WASTEWATER; MESA, ARIZONA: IRRIGATION SITE

    EPA Science Inventory

    This report presents the results of an assessment of the long-term impacts on crops, soils, and groundwater resulting from irrigation with secondary-treated municipal effluent. The concentrations of pathogens, nutrients, heavy metals, and salts in soils, groundwater, and crops ir...

  1. A Geomorphological Assessment of Armored Deposits Along the Southern Flanks of Grand Mesa, CO, USA 

    E-print Network

    Brunk, Timothy J.

    2011-08-08

    A series of deposits, located along the southern flanks of Grand Mesa, Colorado, and extending to the south, are problematic, and the processes related to emplacement are not understood. The overall area is dominated by two landform systems, Grand...

  2. Application of the MESA reactive hydrocode to space vehicle explosive ordnance devices

    NASA Technical Reports Server (NTRS)

    Goldstein, Selma

    1993-01-01

    The construction of detailed computational models of the dynamic behavior of various explosive ordnance devices used on space vehicles is discussed. The following topics are presented in viewgraph form: numerical methods, explosives and detonations, and the MESA computer code.

  3. Overview of the Multiscale Epidemiologic/Economic Simulation and Analysis (MESA) Decision Support System

    SciTech Connect

    Speck, D E

    2008-04-28

    The Multiscale Epidemiologic/Economic Simulation and Analysis (MESA) Decision Support System (DSS) is the product of investments that began in FY05 by the Department of Homeland Security (DHS) Science and Technology Directorate and continue today with joint funding by both DHS and the US Department of Agriculture (USDA). The DSS consists of a coupled epidemiologic/economic model, a standalone graphical user interface (GUI) that supports both model setup and post-analysis, and a Scenario Bank archive to store all content related to foreign animal disease (FAD) studies. The MESA epi model is an object-oriented, agent-based, stochastic, spatio-temporal simulator that parametrically models FAD outbreaks and response strategies from initial disease introduction to conclusion over local, regional, and national scales. Through its output database, the epi model couples to an economic model that calculates farm-level impacts from animal infections, responsive control strategies and loss of trade. The MESA architecture contains a variety of internal models that implement the major components of the epi simulation, including disease introduction, intra-herd spread, inter-herd spread (direct and indirect), detection, and various control strategies (movement restrictions, culling, vaccination) in a highly configurable and extensible fashion. MESA development was originally focused to support investigations into the economic and agricultural industry impacts associated with Foot-and-Mouth Disease (FMD outbreaks). However, it has been adapted to other FADs such has Highly Pathogenic Avian Influenza (HPAI), Classical Swine Fever (CSF) and Exotic Newcastle Disease (END). The MESA model is highly parameterized and employs an extensible architecture that permits straightforward addition of new component models (e.g., alternative disease spread approaches) when necessary. Since its inception, MESA has been developed with a requirement to enable simulation of the very large scale, nationwide disease outbreaks that are of special interest to DHS. MESA has been developed at Lawrence Livermore National Laboratory (LLNL) and has benefited from the world-class experience in supercomputing application development held by LLNL staff as well as the best-in-class high performance computing infrastructure in place at LLNL. MESA incorporates novel architectural features that permit it to make efficient use of available compute cycles by dynamically increasing the fidelity of the simulation in spatial (geopolitical) regions where relevant activity is occurring and keeping other regions aggregated into a computationally simpler representation. In addition to the MESA epi and economic models, the MESA DSS incorporates other key components. Integral to the parametric approach MESA employs to setup and define disease outbreak scenarios is a GUI that enables the MESA user to efficiently manage the thousands of parameters required by the simulator. The GUI provides individual parameter editors for groups of variables that support a common high level function, such as disease introduction, spread, control strategies, etc. It also provides a capability to browse through multiple study projects and develop n-additional outbreak scenarios per project through successive refinement of existing scenarios. Finally, the MESA GUI links post-processing applications that permit extraction of key data from MESA raw output, generation of spreadsheets, and geospatial mapping of simulation results. The MESA GUI is a standalone application that normally runs on the user's desktop, although its Java source code is portable and can execute under virtually any modern operating system. The final major component of the MESA DSS is the Scenario Bank, which is a web-served archive of unclassified FAD study content. The Scenario Bank implements a hierarchy of spaces, structured primarily along organizational lines (e.g., 'USDA', 'LLNL', etc), that permits participants to store simulator inputs, outputs, analysis results, reports, etc. and explicitly control who among Bank users may

  4. Mesa: Geo-Replicated, Near Real-Time, Scalable Data Warehousing

    E-print Network

    Cortes, Corinna

    Mesa: Geo-Replicated, Near Real-Time, Scalable Data Warehousing Ashish Gupta, Fan Yang, Jason Govig, Adam Kirsch, Kelvin Chan Kevin Lai, Shuo Wu, Sandeep Govind Dhoot, Abhilash Rajesh Kumar, Ankur Agiwal

  5. Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona: 2011-2012

    USGS Publications Warehouse

    Macy, Jamie P.; Unema, Joel A.

    2014-01-01

    The Navajo (N) aquifer is an extensive aquifer and the primary source of groundwater in the 5,400-square-mile Black Mesa area in northeastern Arizona. Availability of water is an important issue in northeastern Arizona because of continued water requirements for industrial and municipal use by a growing population and because of low precipitation in the arid climate of the Black Mesa area. Precipitation in the area typically is between 6 and 14 inches per year. The U.S. Geological Survey water-monitoring program in the Black Mesa area began in 1971 and provides information about the long-term effects of groundwater withdrawals from the N aquifer for industrial and municipal uses. This report presents results of data collected as part of the monitoring program in the Black Mesa area from January 2011 to September 2012. The monitoring program includes measurements of (1) groundwater withdrawals, (2) groundwater levels, (3) spring discharge, (4) surface-water discharge, and (5) groundwater chemistry. In 2011, total groundwater withdrawals were 4,480 acre-ft, industrial withdrawals were 1,390 acre-ft, and municipal withdrawals were 3,090 acre-ft. Total withdrawals during 2011 were about 39 percent less than total withdrawals in 2005 because of Peabody Western Coal Company’s discontinued use of water to transport coal in a slurry. From 2010 to 2011 total withdrawals increased by 11 percent; industrial withdrawals increased by approximately 19 percent, and total municipal withdrawals increased by 8 percent. From 2011 to 2012, annually measured water levels in the Black Mesa area declined in 8 of 15 wells that were available for comparison in the unconfined areas of the N aquifer, and the median change was -0.1 feet. Water levels declined in 9 of 18 wells measured in the confined area of the aquifer. The median change for the confined area of the aquifer was 0.0 feet. From the prestress period (prior to 1965) to 2012, the median water-level change for 34 wells in both the confined and unconfined areas was -13.4 feet; the median water-level changes were -2.1 feet for 16 wells measured in the unconfined areas and -39.1 feet for 18 wells measured in the confined area. Spring flow was measured at four springs in 2012. Flow fluctuated during the period of record for Burro and Unnamed Spring near Dennehotso, but a decreasing trend was apparent at Moenkopi School Spring and Pasture Canyon Spring. Discharge at Burro Spring has remained relatively constant since it was first measured in the 1980s and discharge at Unnamed Spring near Dennehotso has fluctuated for the period of record. Trend analysis for discharge at Moenkopi and Pasture Canyon Springs yielded a slope significantly different from zero. Continuous records of surface-water discharge in the Black Mesa area were collected from streamflow-gaging stations at the following sites: Moenkopi Wash at Moenkopi 09401260 (1976 to 2010), Dinnebito Wash near Sand Springs 09401110 (1993 to 2010), Polacca Wash near Second Mesa 09400568 (1994 to 2010), and Pasture Canyon Springs 09401265 (2004 to 2010). Median winter flows (November through February) of each water year were used as an index of the amount of groundwater discharge at the above-named sites. For the period of record of each streamflow-gaging station, the median winter flows have generally remained constant, and there are no significant statistical trends in groundwater discharge. In 2012, water samples collected from 10 wells and 4 springs in the Black Mesa area were analyzed for selected chemical constituents, and the results were compared with previous analyses. Concentrations of dissolved solids, chloride, and sulfate have varied at all 10 wells for the period of record, but neither increasing nor decreasing trends over time were found. Dissolved solids, chloride, and sulfate concentrations increased at Moenkopi School Spring during the more than 12 years of record at that site. Concentrations of dissolved solids, chloride, and sulfate at Pasture Canyon Spring have not varied significantly since the early 1980s, and there

  6. Remedial action selection report Maybell, Colorado, site. Final report

    SciTech Connect

    NONE

    1996-12-01

    The Maybell uranium mill tailings site is 25 miles (mi) (40 kilometers [km]) west of the town of Craig, Colorado, in Moffat County, in the northwestern part of the state. The unincorporated town of Maybell is 5 road mi (8 km) southwest of the site. The site is 2.5 mi (4 km) northeast of the Yampa River on relatively flat terrain broken by low, flat-topped mesas. U.S. Highway 40 runs east-west 2 mi (3.2 km) south of the site. The designated site covers approximately 110 acres (ac) (45 hectares [ha]) and consists of a concave-shaped tailings pile and rubble from the demolition of the mill buildings buried in the former mill area. The site is situated between Johnson Wash to the east and Rob Pit Mine to the west. Numerous reclaimed and unreclaimed mines are in the immediate vicinity. Aerial photographs (included at the end of this executive summary) show evidence of mining activity around the Maybell site. Contaminated materials at the Maybell processing site include the tailings pile, which has an average depth of 20 feet (ft) (6 meters [ml]) and contains 2.8 million cubic yards (yd{sup 3}) (2.1 million cubic meters [m{sup 3}]) of tailings. The former mill processing area is on the north side of the site and contains 20,000 yd 3 (15,000 m{sup 3}) of contaminated demolition debris. Off-pile contamination is present and includes areas adjacent to the tailings pile, as well as contamination dispersed by wind and surface water flow. The volume of off-pile contamination to be placed in the disposal cell is 550,000 yd{sup 3}(420,000 m{sup 3}). The total volume of contaminated materials to be disposed of as part of the remedial action is estimated to be 3.37 million yd{sup 3} (2.58 million m{sup 3}).

  7. A Geomorphological Assessment of Armored Deposits Along the Southern Flanks of Grand Mesa, CO, USA

    E-print Network

    Brunk, Timothy J.

    2011-08-08

    A GEOMORPHOLOGICAL ASSESSMENT OF ARMORED DEPOSITS ALONG THE SOUTHERN FLANKS OF GRAND MESA, CO, USA A Thesis by TIMOTHY JAMES BRUNK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 2010 Major Subject: Geology A GEOMORPHOLOGICAL ASSESSMENT OF ARMORED DEPOSITS ALONG THE SOUTHERN FLANKS OF GRAND MESA, CO, USA A Thesis by TIMOTHY JAMES BRUNK Submitted...

  8. 15. VIEW LOOKING EAST, SHOWING RETAINING WALL ON EAST SIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. VIEW LOOKING EAST, SHOWING RETAINING WALL ON EAST SIDE OF PARK, SOUTH OF ENGINE HOUSE (4' X 5' negative) - Fairmount Waterworks, East bank of Schuylkill River, Aquarium Drive, Philadelphia, Philadelphia County, PA

  9. 55. LOOKING EAST FROM HEAD OF PLANE 2 EAST. POWER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    55. LOOKING EAST FROM HEAD OF PLANE 2 EAST. POWER HOUSE AND FLUME VISIBLE TO RIGHT, TAILRACE RUNNING THROUGH CENTER OF PHOTOGRAPH. CRADLE TO INCLINED PLANE 3 EAST IS VISIBLE IN BACKGROUND TO LEFT. - Morris Canal, Phillipsburg, Warren County, NJ

  10. EAST (TRACKSIDE) ELEVATION OF STATION. East Broad Top Railroad, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    EAST (TRACKSIDE) ELEVATION OF STATION. - East Broad Top Railroad, Saltillo Station, Along the East Broad Top Railroad (at milepost 18.8) and PA Route 655 (South Main Street), Saltillo, Huntingdon County, PA

  11. 2. VIEW EAST, East Control Area, west radar tower in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW EAST, East Control Area, west radar tower in foreground, east radar lower in background - Newport NIKE Missile Battery D-57/58, Integrated Fire Control Area, Newport Road, Carleton, Monroe County, MI

  12. 11. Relationship of barn, east tool shed, west tool shed, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Relationship of barn, east tool shed, west tool shed, and residence to overall farmstead site, looking southeast - George Spangerberger Farmstead, 2012 West Illinois Avenue, South Hutchinson, Reno County, KS

  13. 22. SIDE VIEW OF MISSILE ASSEMBLY BUILDING, LOOKING EAST Everett ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. SIDE VIEW OF MISSILE ASSEMBLY BUILDING, LOOKING EAST Everett Weinreb, photographer, March 1988 - Mount Gleason Nike Missile Site, Angeles National Forest, South of Soledad Canyon, Sylmar, Los Angeles County, CA

  14. Interior view to the east of an empty computer room ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view to the east of an empty computer room - Over-the-Horizon Backscatter Radar Network, Christmas Valley Radar Site Transmit Sector Six Transmitter Building, On unnamed road west of Lost Forest Road, Christmas Valley, Lake County, OR

  15. 5. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION OF THE TEST CELL, WITH DEWARS IN THE BACKGROUND. - Nevada Test Site, Test Cell C Facility, Building No. 3210, Area 25, Jackass Flats, Road J, Mercury, Nye County, NV

  16. View from west to east of limited area sentry station, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View from west to east of limited area sentry station, missile site control building can be seen on left - Stanley R. Mickelsen Safeguard Complex, Limited Area Sentry Station, At gate between Avenue A & Tactical Road, Nekoma, Cavalier County, ND

  17. The Middle East.

    ERIC Educational Resources Information Center

    Blouin, Virginia; And Others

    This sixth grade resource unit focuses on Middle East culture as seen through five areas of the social sciences: anthropology-sociology, geography, history, economics, and political science. Among objectives that the student is expected to achieve are the following: 1) given general information on the Middle East through the use of film, visuals,…

  18. East Providence: Aerial

    Microsoft Academic Search

    Chet Smolski

    1990-01-01

    This photograph shows industrial and commercial developments in East Providence along state highway 114. Just barely visible on the horizon is Narragansett bay. The containers on the bay have since been torn down and the area has largely returned natural growth along the East Bay Bike Path, which was completed in 1992.

  19. Eruptive vents for the Burro Mesa Rhyolite, Big Bend National Park, Trans-Pecos Texas

    SciTech Connect

    Holt, G.S.; Parker, D.F. (Baylor Univ., Waco, TX (United States). Dept. of Geology)

    1993-02-01

    Detailed mapping of field relations and flow direction of the Burro Mesa Rhyolite (BMR) have identified vent localities at Burro Mesa, Kit Mountain, Cerro Castellan, Trap Mountain, and Goat Mountain, and the suggest the presence of additional, as yet unlocated, centers of eruption. This work confirms recent interpretations that BMR rocks were not erupted from the Pine Canyon caldera, but were instead erupted from isolated feeder localities in the Burro Mesa-Cerro Castellan area. At the Burro Mesa locality, the BMR contains a lower sparsely-porphyritic lava, a central porphyritic ash-flow tuff, and an upper abundantly-porphyritic lava. At all other mapped localities, only sparsely-porphyritic lava and Wasp Springs Flow Breccia (WSFB) are present. Two vents at Burro Mesa represent sources for separate BMR flows, as well as WSFB, which consists of numerous surge deposits with interbedded ash-flow tuff. Flow directional data suggests a third unlocated vent for abundantly-porphyritic lava in the SE region of Burro Mesa. Flow direction data also suggest that the SW end of Kit Mountain was a source for sparsely-porphyritic lava. A feeder dike at Cerro Castellan cuts up through the WSFB, flaring near the top into a volcanic dome of sparsely-porphyritic lava at the top of the mountain. This cross-cutting relationship was present at most vent localities. Mapping and flow direction data of BMR from vents and other localities suggest that the BMR consists of a discontinuous belt of individual domes, which trend in a southwesterly direction from Burro Mesa to Cerro Castellan.

  20. Very High Resolution Bathymetric Mapping at the Ridge 2000 Integrated Study Sites: Acquisition and Processing Protocols Developed During Recent Alvin Field Programs to the East Pacific Rise and Juan de Fuca Ridge

    NASA Astrophysics Data System (ADS)

    Ferrini, V.; Fornari, D. J.; Shank, T.; Tivey, M.; Kelley, D. S.; Glickson, D.; Carbotte, S. M.; Howland, J.; Whitcomb, L. L.; Yoerger, D.

    2004-12-01

    Recent field programs at the East Pacific Rise and Juan de Fuca Ridge have resulted in the refinement of data processing protocols that enable the rapid creation of high-resolution (meter-scale) bathymetric maps from pencil-beam altimetric sonar data that are routinely collected during DSV Alvin dives. With the development of the appropriate processing tools, the Imagenex sonar, a permanent sensor on Alvin, can be used by a broad range of scientists permitting the analysis of various data sets within the context of high-quality bathymetric maps. The data processing protocol integrates depth data recorded with Alvin's Paroscientific pressure sensor with bathymetric soundings collected with an Imagenex 675 kHz articulating (scanning) sonar system, and high-resolution navigational data acquired with DVLNAV, which includes bottom lock Doppler sonar and long baseline (LBL) navigation. Together these data allow us, for the first time, to visualize portions of Ridge 2000 Integrated Study Sites (ISS) at 1-m vertical and horizontal resolution. These maps resolve morphological details of structures within the summit trough at scales that are relevant to biological communities (e.g. hydrothermal vents, lava pillars, trough walls), thus providing the important geologic context necessary to better understand spatial patterns associated with integrated biological-hydrothermal-geological processes. The Imagenex sonar is also a permanent sensor on the Jason2 ROV, which is also equipped with an SM2000 (200 kHz) near-bottom multibeam sonar. In the future, it is envisioned that near-bottom multibeam sonars will be standard sensors on all National Deep Submergence Facility (NDSF) vehicles. Streamlining data processing protocols makes these datasets more accessible to NDSF users and ensures broad compatibility between data formats among NDSF vehicle systems and allied vehicles (e.g. ABE). Establishing data processing protocols and software suites, routinely calibrating sensors (e.g. Paroscientific depth sensors), and ensuring good navigational benchmarks between various cruises to the Ridge 2000 ISS improves the capability and quality of rapidly produced high-resolution bathymetric maps enabling users to optimize their diving programs. This is especially important within the context of augmenting high-resolution bathymetric data collection in ISS areas (several cruises to the same area over multiple years) and investigating possible changes in seafloor topography, hydrothermal vent features and/or biological communities that are related to tectonic or volcanic events.

  1. CVD Growth of 3C-SiC on 4H/6H Mesas

    SciTech Connect

    Neudeck,P.; Trunek, A.; Spry, D.; Powell, J.; Du, H.; Skowronski, M.; Huang, X.; Dudley, M.

    2006-01-01

    This article describes growth and characterization of the highest quality reproducible 3C-SiC heteroepitaxial films ever reported. By properly nucleating 3C-SiC growth on top of perfectly on-axis (0001) 4H-SiC mesa surfaces completely free of atomic scale steps and extended defects, growth of 3C-SiC mesa heterofilms completely free of extended crystal defects can be achieved. In contrast, nucleation and growth of 3C-SiC mesa heterofilms on top of 4H-SiC mesas with atomic-scale steps always results in numerous observable dislocations threading through the 3C-SiC epilayer. High-resolution X-ray diffraction (HRXRD) and high resolution cross-sectional transmission electron microscopy (HRXTEM) measurements indicate non-trivial, in-plane, lattice mismatch between the 3C and 4H layers. This mismatch is somewhat relieved in the step-free mesa case via misfit dislocations confined to the 3C/4H interfacial region without dislocations threading into the overlying 3C-SiC layer. These results indicate that the presence or absence of steps at the 3C/4H heteroepitaxial interface critically impacts the quality, defect structure, and relaxation mechanisms of single-crystal heteroepitaxial 3C-SiC films.

  2. 160 East Asian Studies East asian studiEs (Eas)

    E-print Network

    Dresden, Gregory

    160 East Asian Studies East asian studiEs (Eas) CORE FaCuLtY: PROFESSORS O'MARA, SMITKA ASSOCIATE PROFESSORS LuBin, FU, IKEDA, UJIE ASSISTANT PROFESSORS BELLO, CHANG, ROBINSON The program in East Asian Studies is not a major. StudentsidentifiedbythechairoftheEastAsianStudies committee as having completed

  3. 1 East Asian Languages and Literatures EAST ASIAN LANGUAGES AND

    E-print Network

    Vertes, Akos

    1 East Asian Languages and Literatures EAST ASIAN LANGUAGES AND LITERATURES UNDERGRADUATE Bachelor's programs · Bachelor of Arts with a major in Chinese language and literature (http://bulletin.gwu.edu/arts-sciences/east-asian- languages-literatures/ba-chinese) · Bachelor of Arts with a major in Japanese language and literature (http://bulletin.gwu.edu/arts-sciences/east-asian

  4. 157East Asian Studies EAST ASIAN STUDIES (EAS)

    E-print Network

    Dresden, Gregory

    157East Asian Studies EAST ASIAN STUDIES (EAS) CORE FACULTY: PROFESSORS O'MARA, SMITKA ASSOCIATE PROFESSORS LUBIN, FU, IKEDA, UJIE ASSISTANT PROFESSORS BELLO, ROBINSON The program in East Asian Studies is not a major. Students identified by the chair of the East Asian Studies committee as having completed

  5. 19. VIEW OF CRUDE ORE BINS FROM EAST. EAST CRUDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. VIEW OF CRUDE ORE BINS FROM EAST. EAST CRUDE ORE BIN IN FOREGROUND WITH DISCHARGE TO GRIZZLY AT BOTTOM OF VIEW. CONCRETE RETAINING WALL TO LEFT (SOUTH) AND BOTTOM (EAST EDGE OF EAST BIN). - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

  6. M.E.S.A, not Just a Seat at the Table: a Chicano Geology Student's Experience with Investigative Field Research

    NASA Astrophysics Data System (ADS)

    Ponce-Zepeda, M. M.

    2011-12-01

    The MESA (math, engineering, science achievement) program in California engages educationally disadvantaged students, primarily minority groups, providing the opportunity to excel in math and science and graduate with math-based degrees. MESA at East Los Angeles Community College selected me, a returning 24 year-old Chicano student, for the SCEC (Southern California Earthquake Center) summer internship at Utah State University (USU). The project coordinators assigned me to a group with three other undergraduate geology students from across the continent and from a variety of socioeconomic backgrounds to investigate geothermal systems in the Salton Trough and northern Utah. The peer-driven field work transformed student to investigator by forcing each participant to be responsible for the success of the entire group. In this environment, I rose to expectations along with my fellow interns managing a detailed field notebook, sampling, planning routes, level logger maintenance, and x-ray diffractometer analysis interpretation, among other things. Mentorship from and challenges proposed by the USU project advisor further built on this scaffolding of field experience. First hand fieldwork provides a battery of beneficial skills that many undergraduate geology students, especially at the two- year college level, rarely get an opportunity to participate in. The advantage of including non-traditional students from two- year colleges allows for a dynamic research network nationwide. Key sample collection by the East Los Angeles College (ELAC) Geology Club, a student- run club at an inner city community college, facilitated ongoing examination by collecting mud samples from gryphons and mudpots in the Salton Trough and testing temperature, pH levels, electrical conductivity, and total dissolved solids in the field. The samples were sent back to students at USU for further analysis. This collaborative effort is symbiotic as sharing the sampling responsibility allowed USU to save funds and provided ELAC students with the opportunity to gain field- sampling experience. The collaboration that took place allowed community college students to gain confidence in new sampling skills, and students based out of Utah to continue an ongoing study. By sharing the opportunity to conduct fieldwork more students are able to engage in the learning process and contribute to scientific discovery. This feeling of contribution is extremely important to the retention of students in the geosciences. Ultimately, thanks to MESA, this Chicano geology-major gained the confidence and background knowledge necessary to ask critical questions and understand complex concepts that will be the basis for the successful completion of a least a Bachelor of Science degree in geology, and the pursuit of further education.

  7. The preliminary study of autophagy induction of SA and MeSA by confocal

    NASA Astrophysics Data System (ADS)

    Yun, Lijuan; Chen, Wenli

    2010-02-01

    Autophagy appears to be a highly conserved process from unicellular to multicellular eukaryotes which contributes to the equilibrium of intracelluar environment. While it would be harmful to the cells when it is excessive by inducing programmed cell death (PCD). It is a protein degradation process in which cells recycle cytoplasmic contents when subjected to environmental stress conditions or during certain stages of development. Previous studies have demonstrated autophagy can be induced during abiotic or biotic stresses. salicylic acid (SA) and methyl salicytic (MeSA) are endogenous signal molecules. We found SA and MeSA can induce autophagy in Arabidopsis thaliana respectively. While autophagy was not induced by SA or MeSA in tobacco suspension cells under the same concentration and period. The differences in stuctures or physiological states may contribute to the results.

  8. MESA: A 3-D computer code for armor/anti-armor applications

    SciTech Connect

    Manell, D.A.; Adams, T.F.; Holian, K.S.; Addessio, F.L.; Baumgardner, J.R.; Mosso, S.J. (Los Alamos National Lab., NM (USA))

    1989-01-01

    We describe a new 3-D computer code, named MESA, developed at the Los Alamos National Laboratory with DARPA/Army/Marine Corps support specifically for simulations of armor and anti-armor systems. MESA is a three-dimensional, cartesian, Eulerian code with hydrodynamics, high explosives, and material strength models. Among special features of MESA are its high-order advection algorithm, its material interface tracking scheme and the van Leer monotonic advection limiting. We will briefly illustrate the code capabilities by showing comparisons of two calculations with experiments. The first problem shown in this paper is the impact of a lead sphere on a thin lead plate at 6.66 km/s, producing a debris cloud composed mostly of vapor. The second problem is the impact of a copper cylinder at 130 m/s on a rigid wall, producing deformation in the cylinder. 17 refs., 5 figs.

  9. Saban Center for Middle East Policy

    NSDL National Science Digital Library

    Launched in May 2002, the Saban Center for Middle East Policy performs original research surveys and studies in order "to promote a better understanding of the policy choices facing American decisionmakers in the Middle East." Visitors to the site will note that the homepage contains four primary sections, including "Research", "Events", and "Experts". "Research" includes dozens of topical reports and policy briefs organized into thematic categories such as "Middle East Democracy and Development" and "Terrorism". The "Events" area includes information both about upcoming talks and symposia sponsored by the Center and brief synopses of those events that have already occurred. Finally, the "Experts" section provides information on various scholars and fellows who are affiliated with the Center.

  10. The Middle East Institute at Columbia University

    NSDL National Science Digital Library

    Founded in 1954, the Middle East Institute of Columbia University has offered a multidisciplinary approach to studying the Middle East, with a particular emphasis on the 19th and 20th century. Currently under the direction of Professor Rashid Khalidi, the Institute sponsors a number of conferences and talks each year, and also functions as a clearinghouse for information on the region. Alongside detailed information about various public programs for scholars and the general public, the institute's site also provides some helpful educational materials, such as a Research Projects section. Here visitors can download materials on educational outreach for Muslim sensitivity, and peruse other documents on researching Middle East topics on the Internet. The e-Resources section is also worth a look, as it contains a number of archived lectures on very topical themes, including Iran and Israeli and Palestinian nationalism.

  11. Completion Report for Well ER-16-1 Corrective Action Unit 99: Rainier Mesa - Shoshone Mountain

    SciTech Connect

    NSTec Geology Services

    2006-12-01

    Well ER-16-1 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office, in support of the Nevada Environmental Restoration Project at the Nevada Test Site, Nye County, Nevada. The well was drilled in June and July 2005 as part of a hydrogeologic investigation program for the Rainier Mesa-Shoshone Mountain Corrective Action Unit, Number 99. The overall purpose of the well was to gather subsurface data to better characterize the hydrogeology of the Shoshone Mountain area, especially in the older Tertiary and pre-Tertiary strata. The main 46.99-centimeter hole was drilled to a depth of 702.9 meters and cased with 33.97-centimeter casing to 663.7 meters. The hole diameter was then decreased to 31.1 centimeters, and the well was drilled to total depth of 1,220.7 meters. A completion string set at the depth of 1,162.4 meters consisted of 13.97-centimeter stainless-steel casing, with one continuous slotted interval open to the lower carbonate aquifer. The fluid level in the borehole soon dropped, so the borehole was deepened in July 2006. To deepen the borehole, the slotted section was cemented and a 12.1-centimeter hole was drilled through the bottom of the completion string to the new total depth of 1,391.7 meters, which is 171.0 meters deeper than the original borehole. A string of 6.03-centimeter carbon-steel tubing with one continuous slotted interval at 1,361.8 to 1,381.4 meters, and open to the lower carbonate aquifer, was installed in the well with no gravel packing or cement, to serve as a monitoring string. Data gathered during and shortly after hole construction include composite drill cuttings samples collected every 3 meters (extra cuttings samples were collected from the Paleozoic rocks for paleontological analyses), sidewall core samples from 37 depths, various geophysical logs, and water level measurements. These data indicate that the well penetrated 646.8 meters of Tertiary volcanic rocks and 744.9 meters of Paleozoic dolomite, quartzite, shale, and limestone. Three weeks after the monitoring string was installed, the water level was tagged at the drill hole depth of 1,271.9 meters, which equates to an estimated elevation of 761.7 meters, accounting for the borehole angle.

  12. Bats of Mesa Verde National Park, Colorado: composition, reproduction, and roosting habits.

    USGS Publications Warehouse

    O'Shea, Thomas J.; Cryan, Paul M.; Snider, E. Apple; Valdez, Ernest W.; Ellison, Laura E.; Neubaum, Daniel J.

    2011-01-01

    We determined the bat fauna at Mesa Verde National Park (Mesa Verde) in 2006 and 2007, characterized bat elevational distribution and reproduction, and investigated roosting habits of selected species. We captured 1996 bats of 15 species in mist nets set over water during 120 nights of sampling and recorded echolocation calls of an additional species. The bat fauna at Mesa Verde included every species of bat known west of the Great Plains in Colorado, except the little brown bat (Myotis lucifugus). Some species showed skewed sex ratios, primarily due to a preponderance of males. Thirteen species of bats reproduced at Mesa Verde. Major differences in spring precipitation between the 2 years of our study were associated with differences in reproductive rates and, in some species, with numbers of juveniles captured. Reduced reproductive effort during spring drought will have a greater impact on bat populations with the forecasted increase in aridity in much of western North America by models of global climate change. We radiotracked 46 bats of 5 species to roosts and describe the first-known maternity colonies of spotted bats (Euderma maculatum) in Colorado. All 5 species that we tracked to diurnal roosts relied almost exclusively on rock crevices rather than trees or snags, despite the presence of mature forests at Mesa Verde and the use of trees for roosts in similar forests elsewhere by some of these species. Comparisons with past bat surveys at Mesa Verde and in surrounding areas suggest no dramatic evidence for effects of recent stand-replacing fires on the composition of the bat community.

  13. Pathology in East Timor.

    PubMed

    Weinstein, Stephen R

    2002-10-01

    East Timor is the newest nation in Southeast Asia and, with its recent turbulent history, also one of the poorest. Infectious and parasitic diseases such as tuberculosis and malaria are endemic, and the poor infrastructure in the wake of Indonesia's sudden withdrawal has left the country with enormous health challenges. Australia's key role in the emergence of East Timor as an independent country brings with it a long-term interest in the future development of its health services, including pathology. PMID:12408349

  14. 28. AERIAL VIEW LOOKING EAST AT THE WEST GATE IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. AERIAL VIEW LOOKING EAST AT THE WEST GATE IN 1978. SHOWN IS BUILDING 100, THE MAIN ENTRANCE POINT TO THE SITE FROM 1969 UNTIL 1985. DURING THIS TIME EACH AUTOMOBILE THAT ENTERED THE SITE WAS SEARCHED. IN 1985, BUILDING 120 WAS BUILT AT THE OUTERMOST WEST EDGE OF THE SITE. THERE WERE 29 FACILITIES AROUND THE SITE DEDICATED TO SECURITY (5/4/78). - Rocky Flats Plant, Bounded by Indiana Street & Routes 93, 128 & 72, Golden, Jefferson County, CO

  15. Transnational Poster Art: Former East Germany and Latin America, 1970-1989

    NSDL National Science Digital Library

    This site highlights revolutionary art from the former East Germany. Hosted by the Stanford University Library. this site features 25 posters commissioned by the German Democratic Republic (GDR) government during the 1970s and 80s. The posters address themes such as anti-(American) imperialism and solidarity with leftist movements in Latin America, Africa, Southeast Asia, and the Middle East.

  16. Name E-Mail Office Phone Fee Tutoring Mesa, Camilo camilo.mesa@colorado.edu Math 312 303-815-6949 $30/hr H.S. and all undergraduate except Math 1300

    E-print Network

    Stowell, Michael

    Name E-Mail Office Phone Fee Tutoring Mesa, Camilo camilo.mesa@colorado.edu Math 312 303-815-6949 $30/hr H.S. and all undergraduate except Math 1300 Andrews, Scott scott.andrews@colorado.edu Math 362 978-460-3347 $40/hr H.S. and All Undergrad except Math 1300 Migler, Joseph joseph

  17. Process for making a mesa gainasp/inp distributed feedback laser

    SciTech Connect

    Liau, Z.L.; Flanders, D.C.; Walpole, J.N.

    1988-10-11

    This patent describes a method of forming a DFB laser heterojunction device from a doped indium phosphide substrate upon which a gallium indium arsenide phosphide active layer is formed and a layer of indium phosphide, doped opposite to the substrate, formed on the active layer, comprising the steps of: (a) selectively etching the indium phosphide layer until a mesa of indium phosphide is formed over the active layer and a surface of active layer material is exposed on two sides of the mesa; (b) selectively etching only the active layer material at the exposed surfaces until two undercut regions are formed under the mesa with a strip of active material therebetween which is exposed on two sides of the strip; and (c) filling in the undercut region with indium phosphide from the mesa and substrate sufficient to bury the exposed side portions of the strip; (d) forming a grating structure on a exposed surface of either the indium phosphide substrate or the indium phosphide layer.

  18. Missouri Environmental Studies Approach (MESA) Interim Evaluation Report. July 1, 1972-June 30, 1973.

    ERIC Educational Resources Information Center

    Northeast Missouri State Univ., Kirksville.

    This interim evaluation of the Missouri Environmental Studies Approach (MESA) for the period July 1972-June 1973 measured attainment of three objectives, which state that (a) participating teachers will use Environmental Studies (ES) materials in their teaching as a result of two intensive workshops during the summer of 1972; (b) the teacher's…

  19. MESA; maximum entropy time series analysis. [IBM360,370; FORTRAN IV

    Microsoft Academic Search

    T. B. Fowler; M. L. Tobias; J. N. Fox; B. E. Lawler; J. U. Koppel; J. R. Triplett; L. L. Lynn; L. A. Waldman; I. Goldberg; P. Greebler; M. D. Kelley; R. A. Davis; C. E. Keck; J. A. Redfield; W. V. Winkle

    2008-01-01

    The MESA program determines periodic components from input data which represent a time series. Transformations may be performed on the raw data before doing the spectral analysis. Routines are included to calculate both the Fourier spectrum and maximum entropy spectrum, the Yule-Walker estimates of the autocovariance function, the periodogram ordinates, the cumulative periodogram, the autocorrelation function resulting from the maximum

  20. CALL FOR PAPERS MESA09 2009 ASME/IEEE International Conference

    E-print Network

    Cheng, Harry H.

    CALL FOR PAPERS MESA09 ­ 2009 ASME/IEEE International Conference on Mechatronic and Embedded, USA Holger Voos, Hochschule Ravensburg-Weingarten, Germany International Program Committee: http://www.asmeconferences.org/IDETC09/ Technical Co-Sponsors ASME Division of Design Engineering IEEE Intelligent Transportation Systems

  1. The HeleShaw problem as a ``Mesa'' limit of Stefan problems: Existence, uniqueness,

    E-print Network

    Blank, Ivan

    a Hele­Shaw problem with a mushy region obtained as a mesa type limit of one phase Stefan problems models the advance of the slick formed by injecting oil be­ tween two nearby plates, and has further been'' region. Because of changes in topology of the advancing slick, the need for a suit­ able definition

  2. The Hele-Shaw problem as a "Mesa" limit of Stefan problems: Existence, uniqueness,

    E-print Network

    Blank, Ivan

    a Hele-Shaw problem with a mushy region obtained as a mesa type limit of one phase Stefan problems a curvature term. This problem models the advance of the slick formed by injecting oil be- tween two nearby have a "mushy" region. Because of changes in topology of the advancing slick, the need for a suit- able

  3. Mineral resources of the Mancos Mesa Wilderness Study Area, San Juan County, Utah

    Microsoft Academic Search

    F. G. Poole; G. A. Desborough; H. N. Barton; W. F. Hanna; K. Lee; R. F. Kness

    1989-01-01

    The Mancos Mesa Wilderness Study Area consists of 51,440 acres in San Juan County, Utah. This study area is on the west flank of the north-trending Monument Uplift and is underlain by gently west dripping sedimentary rocks of Paleozoic and Mesozoic age. There is moderate mineral resource potential for uranium and a moderate energy resource potential for oil and gas

  4. Hunter-gatherer adaptations and environmental change in the southern Great Basin: The evidence from Pahute and Rainier mesas

    SciTech Connect

    Pippin, L.C.

    1998-06-01

    This paper reviews the evidence for fluctuations in past environments in the southern Great Basin and examines how these changes may have affected the strategies followed by past hunter and gatherers in their utilization of the resources available on a highland in this region. The evidence used to reconstruct past environments for the region include botanical remains from packrat middens, pollen spectra from lake and spring deposits, faunal remains recovered from archaeological and geologic contexts, tree-ring indices from trees located in sensitive (tree-line) environments, and eolian, alluvial and fluvial sediments deposited in a variety of contexts. Interpretations of past hunter and gatherer adaptive strategies are based on a sample of 1,311 archaeological sites recorded during preconstruction surveys on Pahute and Rainier mesas in advance of the US Department of Energy`s nuclear weapons testing program. Projectile point chronologies and available tree-ring, radiocarbon, thermoluminescence and obsidian hydration dates were used to assign these archaeological sites to specific periods of use.

  5. Japanese Studies Resources Guide: Duke University East Asian Collection

    NSDL National Science Digital Library

    Kristina Kade Troost, East Asian Librarian at Duke, has constructed an excellent collection of resources for Japanese Studies. This site describes resources available at Duke and through the Internet, including encyclopedias, general and subject bibliographies, word and name dictionaries, periodical and newspaper indexes and holdings, library and book catalogs, East Asian collections in the US, related web sites, and Japan-related discussion lists. The guide covers both English and Japanese language resources and special software is necessary to decode the Japanese. This is a rich, detailed, and easy to navigate site that serves as an excellent starting point for any search for Japanese resources on the Internet.

  6. Monitoring Volcanic Gases on Kilauea's East Rift Zone

    USGS Multimedia Gallery

    Hawaiian Volcano Observatory Geochemist Jeff Sutton and CSAV international volcanology students visit a continuous gas monitoring site on Kilauea's east rift zone during field studies portion of the summer training course. Instrumentation at this site measures ambient concentration of noxious sulfur...

  7. Monitoring Volcanic Gases on Kilauea's East Rift Zone II

    USGS Multimedia Gallery

    Hawaiian Volcano Observatory Geochemist Jeff Sutton and CSAV international volcanology students visit a continuous gas monitoring site on Kilauea's east rift zone during field studies portion of the summer training course. Instrumentation at this site measures ambient concentration of noxious su...

  8. Attributes and characteristics of the Mathematics, Engineering, Science, Achievement (MESA) high school program for first-generation Latino students

    Microsoft Academic Search

    Ramon Flores

    2007-01-01

    This study used a web-based survey collected data from 28 first-generation Latino engineers who participated in the Mathematics, Engineering, Science, Achievement (MESA) program during their high school years. From the set of 28 respondents, 5 volunteered to participate in an optional telephone interview. The purpose of this study was to describe the critical attributes and characteristics of the MESA program

  9. The mesa merging oxidation method for creating low-loss dielectrics and transmission lines on low-resistivity silicon

    E-print Network

    Bowers, John

    The mesa merging oxidation method for creating low-loss dielectrics and transmission lines on low.1088/0960-1317/21/6/065020 The mesa merging oxidation method for creating low-loss dielectrics and transmission lines on low dielectrics enable high-impedance and low-loss hicoplanar transmission lines to be created with this method

  10. British Museum: Middle East

    NSDL National Science Digital Library

    This website from the British Museum lets visitors explore the Middle East in an online tour. The main page of the Middle East section allows the visitor to explore the Middle East via the themes of "Agatha Christie and archaeology", "The kingdoms of ancient South Arabia", "The Queen of Sheba", and "Iran before Islam: The Sasanians". After the visitor clicks on a theme, they will see thumbnails of artifacts to click on, which when chosen, will be accompanied by an explanation of the artifact. Related photos, drawings, charts, etc. may also appear below the photo of the artifact, and can be enlarged by clicking on it directly. Visitors should not miss the "Queen of Sheba" theme to see some works of art that have depicted this austere leader throughout recorded history.

  11. East wing. Elevation of east side along Presidio Avenue, as ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    East wing. Elevation of east side along Presidio Avenue, as seen from the rooftop of the Laurel Inn across the street. - Jewish Community Center of San Francisco, 3200 California Street, San Francisco, San Francisco County, CA

  12. 29. SECOND FLOOR EAST SIDE APARTMENT EAST BEDROOM INTERIOR. ALUMINUMFRAME ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. SECOND FLOOR EAST SIDE APARTMENT EAST BEDROOM INTERIOR. ALUMINUM-FRAME SLIDING-GLASS WINDOWS ARE REPLACEMENTS. VIEW TO NORTHEAST. - Lee Vining Creek Hydroelectric System, Triplex Cottage, Lee Vining Creek, Lee Vining, Mono County, CA

  13. 35. EAST FRONT OF POWERHOUSE AND CAR BARN: East front ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    35. EAST FRONT OF POWERHOUSE AND CAR BARN: East front of powerhouse and car barn. 'Annex' is right end of building. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

  14. Perspective view looking from the east to the east northeast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Perspective view looking from the east to the east northeast facade, with Swiss Chalet in background, to replicate the view shown in MD-1109-J-18 - National Park Seminary, Japanese Pagoda, 2805 Linden Lane, Silver Spring, Montgomery County, MD

  15. 3. East side, details of north half of east web; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. East side, details of north half of east web; also details of roadway, railing and overhead bracing; looking northeast - Dodd Ford Bridge, County Road 147 Spanning Blue Earth River, Amboy, Blue Earth County, MN

  16. 11. VIEW EAST, DETAIL OF EAST TRUSS AND SIDEWALK HANDRAIL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. VIEW EAST, DETAIL OF EAST TRUSS AND SIDEWALK HANDRAIL - Osborn Avenue Bridge, Spanning New Jersey Transit Raritan Valley Line at Tuttle Parkway (formerly Osborn Avenue), Westfield, Union County, NJ

  17. INTERIOR VIEW OF EAST SIDE WALL AND DOOR, FACING EAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR VIEW OF EAST SIDE WALL AND DOOR, FACING EAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Wing & Fuselage Assembly Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

  18. 10. BUILDING: SECOND FLOOR (East Section), VIEW SOUTH: EAST, SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. BUILDING: SECOND FLOOR (East Section), VIEW SOUTH: EAST, SOUTH AND WEST WALLS OF COLD STORAGE, ALSO SHOWING REMNANTS OF COOLING PIPES - Boston Beer Company, 225-249 West Second Street, South Boston, Suffolk County, MA

  19. 12. Detail from east river bank, showing east abutment and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Detail from east river bank, showing east abutment and pylons and truss geometry under roadway, looking upward and northeast - French King Bridge, Spanning Connecticut River on State Highway 2, Erving, Franklin County, MA

  20. 2. VIEW SOUTHEAST, ROUTE 30 EAST FROM ROUTE 30 EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW SOUTHEAST, ROUTE 30 EAST FROM ROUTE 30 EAST ISLAND - White Horse Pike Rond Point, Intersection of Crescent Boulevard (U.S. Route 130), White Horse Pike (U.S. Route 30), & Clay Avenue, Collingswood, Camden County, NJ

  1. 12. VIEW EAST, ROUTE 30 EAST FROM ROUTE 130 SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW EAST, ROUTE 30 EAST FROM ROUTE 130 SOUTH ISLAND - White Horse Pike Rond Point, Intersection of Crescent Boulevard (U.S. Route 130), White Horse Pike (U.S. Route 30), & Clay Avenue, Collingswood, Camden County, NJ

  2. 48. AUXILIARY CHAMBER (EAST END), VIEW LOOKING EAST SHOWING ELECTRICAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    48. AUXILIARY CHAMBER (EAST END), VIEW LOOKING EAST SHOWING ELECTRICAL PENETRATION AND AIR LOCK (LOCATION GGG) - Shippingport Atomic Power Station, On Ohio River, 25 miles Northwest of Pittsburgh, Shippingport, Beaver County, PA

  3. 14. VIEW LOOKING WEST AT THE EAST SIDE OF BUILDING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. VIEW LOOKING WEST AT THE EAST SIDE OF BUILDING 81 UNDER CONSTRUCTION IN 1952. THE GROUND RISES IN ELEVATION TOWARD THE CENTER OF THE SITE FROM THE NORTH, EAST, AND SOUTH. BUILDINGS 71, 91, AND 81 WERE BUILT INTO HILLSIDES SO THAT IN THE EVENT OF A SOVIET ATTACK, ALL THREE PLANTS WOULD NOT BE DESTROYED (1952). - Rocky Flats Plant, Bounded by Indiana Street & Routes 93, 128 & 72, Golden, Jefferson County, CO

  4. The Colorado MESA Program and CU-LASP: A Model for After School Program/Research Institution Collaboratives

    NASA Astrophysics Data System (ADS)

    Nelson, G.; Cobabe-Ammann, E.

    2004-12-01

    Colorado MESA is an after school program operating throughout the state with a long track record in promoting science, math and engineering education to largely underserved K-12 student populations. Currently, 81 percent of MESA students are from groups underrepresented in the math/science careers, and 85 percent of MESA students come from low- and moderate-income families. Through a combination of weekly student programs, field trips to universities and industry partners, family orientations, individual academic counseling and required curriculum, Colorado MESA offers an opportunity for students to explore STEM subjects and careers that they might not otherwise have access to - with tangible results. In the Colorado MESA Class of 2003, 97 percent of students planned on entering college this fall, with 86 percent indicating that they will enroll in math/science-based majors. In the last year, the University of Colorado's Laboratory for Atmospheric and Space Physics, a large space and earth sciences institute, has relied on the Colorado MESA program as its primary K-12 partner in Education and Public Outreach. LASP incorporates MESA into its proposal writing opportunities, from E/PO additions to individual research proposals to mission-level educational programs. In addition to funding opportunities, LASP provides scientists and engineers in a variety of contexts and content areas, while MESA works to incorporate those resources into their after school programs. The interface between the after school programs and the research institution requires ongoing communication and coordination in order to evaluate and fine-tune curriculum and activities based on feedback from MESA advisors and teachers. Currently, the MESA/LASP partnership has funded programs in astrobiology, planetary sciences and engineering.

  5. 4. Engine room, east end looking east toward engine #4 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Engine room, east end looking east toward engine #4 (Enterprise Diesel; reduction gear in foreground; in left rear, two D.C. generators with Ames Ironworks horizontal engine and sturtevant vertical engine - East Boston Pumping Station, Chelsea Street at Chelsea Creek, Boston, Suffolk County, MA

  6. East Coast -Suez Canal 15 East Coast -Strait of Hormuz 24

    E-print Network

    Bases Places Crossroads East Coast - Suez Canal 15 East Coast - Strait of Hormuz 24 East Coast deployed (Avg Last 90 Days) 8 Sep 14 ~190 ships #12;Bases Places Crossroads East Coast - Suez Canal 15 East

  7. Middle East Respiratory Syndrome (MERS)

    MedlinePLUS

    Middle East Respiratory Syndrome Coronavirus; MERS-CoV; Novel coronavirus; nCoV ... Middle East Respiratory Syndrome (MERS) is a severe respiratory illness. It causes fever, coughing, and shortness of breath. About 30% of people who have gotten ...

  8. Genesis and evolution of the upper oceanic crust (ODP-IODP site 1256, East Pacific Rise): inferences from structure and composition of late magmatic veins in a lava pond

    NASA Astrophysics Data System (ADS)

    Panseri, M.

    2009-04-01

    A complete intact "in situ" section of upper oceanic crust, from extrusive lavas, through dikes into gabbros has been recently drilled for the first time in a 15 Ma old crust that formed at the East Pacific Rise with a full spreading rate of >200 mm/yr. The study area is ODP-IODP Site 1256 (6°44.2N, 91°56.1W, Pacific Ocean). Holes 1256C and 1256D have been drilled into the basaltic basement during ODP Leg 206, IODP Expeditions 309 and 312. Hole 1256D has been deepened to a depth of ca. 1500 meters below seafloor (mbsf). The upper section of the igneous basement consists of thin (<3m) basaltic sheet flows separated by chilled margins, and massive basaltic flows (>3m). The massive flows include a ponded lava flow, located near the top of both Hole 1256C and 1256D, where it has a thickness of 32m and 74m, respectively. The lava pond is interpreted as a thick lava flow delivered either on-axis or off-axis and accumulated in a topographic depression. Although very close (ca. 30m), the two holes record different structural patterns of the lava pond, probably related to different steps of the lava flow emplacement. In the lava pond, both igneous (magmatic foliation, flow-related folds, late-magmatic veins) and post-magmatic (joints, veins, shear veins, and microfaults) structures were recognized. Late magmatic veins (LMVs), which were identified as primary features typical of the lava pond, are the main goal of this work. Mm-thick LMVs are mainly clustered in the middle (290-300 mbsf in hole 1256C and 282-297 mbsf in hole 1256D) and bottom (312-313 mbsf in hole 1256C and 311-328 mbsf in hole 1256D) parts of the lava pond. Structural measurements on cores suggest that they are mostly gently dipping structures, but we also observed sub-vertical LMVs. At the bottom of the lava pond in hole 1256C, late magmatic veins are often arranged in en echelon arrays and sigmoidal pull aparts, suggesting a syn/post-magmatic shear component. Thin-section observations show that basalt including LMVs consists of plagioclase, clinopyroxene, ilmenite, and spinel. LMVs cutting basalt are filled with quartz, quartz + plagioclase intergrowth showing a granophyric texture, clinopyroxene, ilmenite, spinel, and apatite. Rarely we observed pyrite crystals at the LMV core that cut plagioclase + quartz intergrowth. Quartz + plagioclase intergrowth (with apatite) are also present in the basalt as mm-size interstitial domains or rimming plagioclase (IDs = intergrowth domains). Rare samples display IDs with interstitial K-feldspar growing around plagioclase. LMVs often show sharp contacts with basalt. Plagioclase or pyroxene crystals of the basalt may be fragmented at the contact with LMVs (brittle rheology of basalt). Differently, IDs commonly corrode plagioclase crystals, without fragmentation (ductile rheology). The composition of basalt plagioclase ranges from Ab37 to Ab62, with a main concentration around Ab50. On the contrary, plagioclase in the LMVs intergrowth as well as that in the mm-sized IDs are Na-rich (Ab64-Ab98). Mineral analyses also highlight homogeneous clinopyroxene, spinel and ilmenite, without variations in the LMVs and IDs. Clinopyroxene usually shows a Ca-poor core (mainly augite or pigeonite) and a diopsidic rim. Opaque minerals often exhibit ilmenite-ulvospinel lamellae intergrowths. EDS mapping of IDs and LMVs cutting basalt supports the previous observations. LMVs and IDs have higher Si, Na and lower Al, Ca values than basalt. This distribution is only due to albitic plagioclase concentration in LMVs and IDs. K has low and homogeneous concentrations: rarely IDs are characterized by interstitial K enrichment (K-feldspar). Incompatible (Zr, Rb, Sr, Ba), hydrothermal elements (Cu, Cl), and F are undetectable or absent. We infer that LMVs and IDs likely crystallized from a pure Si-Al-Na-(Ca) melt. K, rarely noticed in the IDs, may be related to late magmatic fluids differentiation or to subsequent hydrothermal fluids. Core description, microstructural observations, mineral compositions and EDS mapping of the stud

  9. East Texas Storytellers.

    ERIC Educational Resources Information Center

    Anderson, Brandi, Ed.

    1987-01-01

    Written and published by the students at Gary High School, Gary, Texas, "Loblolly Magazine" is published twice a year. Issues are frequently devoted to a distant theme. The theme of this issue, "East Texas Storytellers," attempts to capture some of the local color and regional history of eastern Texas. The first article, "Timothy Griffith, Master…

  10. Understanding the Middle East.

    ERIC Educational Resources Information Center

    Owen, Evelyn C.

    This nine-week unit on the Middle East for sixth graders was developed as part of a series by the Public Education Religion Studies Center at Wright State University. A major objective is to help students understand and appreciate sacred times and sacred places within this cultural setting. They learn how beliefs and practices cause the people to…

  11. Test Well, East River

    USGS Multimedia Gallery

    USGS test well 10 34h363 in the East River, Brunswick, Ga. The U.S. Geological Survey drilled this test well in the early 1970's and at the time it was on the edge of the marsh at Andrews Island. It is now only accessible by boat or canoe at high tide. Despite being surrounded by saltwater the artes...

  12. Realizar las mesas redondas en un espacio como el aula magna de la divisin de investigacin. Se presentarn entre tres y cinco

    E-print Network

    Islas, León

    Camarena Paola Selene Vera Martínez 23 DE AGOSTO DE 2012 MESA 1. COMPLEJIDAD Participantes: Jorge Cardiel AGOSTO DE 2012 MESA 2.COMPLEJIDAD E INCERTIDUMBRE Participantes: Juan Carlos Barrón Pastor Jorge Cardiel

  13. Sedimentological Reinterpretation of Surficial Unconsolidated Debris Flows and Stream Deposits of the Southern Flanks of Grand Mesa, CO: An Integrated LiDAR Approach 

    E-print Network

    Blakeley, Mitchell W.

    2014-08-08

    The southern slopes of Grand Mesa Colorado consist of glacio-fluvial sediments deposited when the Pleistocene ice cap draping Grand Mesa melted. Debris flows intermixed with braided and meandering stream deposits, were the ...

  14. MESA 3-D calculations of armor penetration by projectiles with combined obliquity and yaw

    SciTech Connect

    Cagliostro, D.J.; Mandell, D.A.; Schwalbe, L.A.; Adams, T.F.; Chapyak, E.J. (Los Alamos National Lab., NM (USA))

    1989-01-01

    We introduce and briefly describe MESA, a new 3-D hydrodynamic code, developed specifically for simulations of armor and anti-armor systems. The code's current capabilities an its planned model improvements and additions are discussed. An Eulerian code using state-of-the-art numerical methods, MESA runs faster and is less affected by spurious numerical diffusion than older codes. It models hydrodynamic flow and the dynamic deformation of solid materials. It uses simple elastic-perfectly plastic material strength models as well as models with strain and strainrate hardening and thermal softening. Future versions will incorporate advanced fracture models. It treats detonations in explosives using a programmed burn. The code's current capabilities are illustrated with simulations of experiments on yawed rods obliquely impacting armor plates at 1.29 km/s. 12 refs., 14 figs.

  15. Variation in the annual average radon concentration measured in homes in Mesa County, Colorado

    SciTech Connect

    Rood, A.S.; George, J.L.; Langner, G.H. Jr.

    1990-04-01

    The purpose of this study is to examine the variability in the annual average indoor radon concentration. The TMC has been collecting annual average radon data for the past 5 years in 33 residential structures in Mesa County, Colorado. This report is an interim report that presents the data collected up to the present. Currently, the plans are to continue this study in the future. 62 refs., 3 figs., 12 tabs.

  16. Current transport in copper indium gallium diselenide solar cells comparing mesa diodes to the full cell

    Microsoft Academic Search

    Jin-Hui Tan; W. A. Anderson

    2003-01-01

    Mesa diodes were formed on CdS\\/CIGS\\/stainless steel solar cells to investigate current transport when edge leakage and spot defects are avoided. Current conduction mechanisms in the device were determined from current–voltage (I–V) and current–voltage–temperature (I–V–T) characteristics. Space charge limited (SCL) current in the mobility regime with an exponential distribution of traps was found in the voltage range of V>0.6V based

  17. InGaAsP/InP undercut mesa laser with planar polyimide passivation

    SciTech Connect

    Koren, U.; Chen, T.R.; Harder, C.; Hasson, A.; Yu, K.L.; Chiu, L.C.; Margalit, S.; Yariv, A.

    1983-03-01

    An undercut mesa laser is fabricated on an n/sup +/-InP substrate using a single step liquid phase epitaxy growth process and a planar structure is obtained by using a polyimide filling layer. The lasers operate at fundamental transverse mode due to a scattering loss mechanism. Threshold currents of 18 mA and stable single transverse mode operating at high currents are obtained.

  18. Coal and coalbed methane resources of Cretaceous rocks of the Black Mesa Basin, northeastern Arizona

    SciTech Connect

    Nations, J.D.; Haven, H.W.; Swift, R.L. [Northern Arizona Univ., Flagstaff, AZ (United States)

    1995-06-01

    Cretaceous rocks of the Black Mesa basin of northeastern Arizona were deposited from Late Cenomanian to Santonian time near the western depositional limit of the transgressive-regressive Greenhorn and Niobrara cyclothems. Coal-bearing rocks of the sequence (including the Dakota Formation, Toreva Formation and Wepo Formation) are preserved in the Black Mesa structural basin of Laramide age. These rocks of the Black Mesa basin are the object of an NSF-sponsored research project to evaluate their coal resources and potential for coalbed methane occurrence. Forty-five measured sections and descriptions of Cretaceous rocks around the eastern margin of the basin have been incorporated into a data base in the software program LOGGER, and have been used to construct a series of stratigraphic cross-sections across the basin using the software program MacSection. These include coal beds and carbonaceous shales that are potential sources of methane as well as reservoirs, and sandstone bodies that are potential secondary reservoirs of methane (and possibly petroleum hydrocarbons from the Mancos Shale). In order to trace the facies changes between measured sections, aerial videography and 35 mm slides have been taken along the entire eastern margin of Black Mesa, a distance of 70 miles. These were digitized to provide detailed lithofacies analyses of the stratigraphic sections along the north-trending cliff line. Trends of thickness variations within these facies are interpreted from isopach maps and known shoreline trends, in order to predict the areas of greatest probability of coalbed methane generation and accumulation. These predictions are also based on the locations of anticlinal and monoclinal fold axes where they cross the thickest coal trends, due to likely enhancement of permeability by cleat and butt fractures in the coal and shale reservoir rocks.

  19. Mineral resources of the Dominguez Canyon Wilderness Study Area, Delta, Mesa, and Montrose counties, Colorado

    SciTech Connect

    Toth, M.I.; Patterson, C.G.; Kulik, D.M.; Schreiner, R.A.

    1987-01-01

    The Dominguez Canyon Wilderness Study Area in Delta, Mesa, and Montrose counties, Colorado, contains flat-lying sedimentary rocks of Triassic to Cretaceous age underlain by Proterozoic crystalline rocks. Investigations by the US Geological Survey and US Bureau of Mines revealed that the wilderness study area has low mineral resource potential for metals, including uranium, oil and gas, coal, and geothermal energy. No identified resources are present.

  20. Naturally weathered feldspar surfaces in the Navajo Sandstone aquifer, Black Mesa, Arizona: Electron microscopic characterization

    Microsoft Academic Search

    Chen Zhu; David R. Veblen; Alex E. Blum; Stephen J. Chipera

    2006-01-01

    Naturally weathered feldspar surfaces in the Jurassic Navajo Sandstone at Black Mesa, Arizona, was characterized with high-resolution transmission and analytical electron microscope (HRTEM-AEM) and field emission gun scanning electron microscope (FEG-SEM). Here, we report the first HRTEM observation of a 10-nm thick amorphous layer on naturally weathered K-feldspar in currently slightly alkaline groundwater. The amorphous layer is probably deficient in

  1. Continuity and change, an archaeobotanical assessment of Tsosie Shelter, Black Mesa, Arizona 

    E-print Network

    Ruppe?, Patricia A

    1987-01-01

    Macrobotanical Remains from Tsosre Shelter 6. 1 Presence/Absence Data Summary of Economrc Pollen from Tsosre Shelter 98 6. Combznation of Assemblage Richness by Depth 108 1X LIST OF FIGURES FIGURE Pa ge Location of Study Area on Black Mesa, Arizona Close... Residuals of Modern prnyon- Juniper Pollen Sample 94 Distribution of Economic Taxa for Pollen and Macrobotanical Samples by Depth 107 6. 4 Schematrc Diagram of Model Expectatzons 112 CHAPTER I INTRODUCTION Ar chaeobotanical research is directed...

  2. Historical and recent fire regimes in Piñon–Juniper woodlands on Mesa Verde, Colorado, USA

    Microsoft Academic Search

    M. Lisa Floyd; David D. Hanna; William H. Romme

    2004-01-01

    The fire history of Piñon–Juniper (Pinus edulis–Juniperus osteosperma) woodlands in much of the southwestern United States is poorly understood, and as a result, fire management decisions are being made without a rigorous ecological underpinning. We investigated the historic fire regimes in Piñon–Juniper woodlands on the Mesa Verde cuesta utilizing stand and age structures. All Piñon trees in eight stands were

  3. Karst subsidence in East Tennessee

    SciTech Connect

    Ketelle, R.H.; Newton, J.G.; Tanner, J.M.

    1988-01-01

    Waste disposal site selection and facility design in regions dominated by carbonate bedrock must carefully consider karst development and the factors which contribute to subsidence activity. The Department of Energy's (DOE) Oak Ridge National Laboratory has completed a three phase study of karst subsidence in East Tennessee to quantify historical subsidence activity. The purpose of the study was to determine the principal factors which cause karst subsidence in the region. Techniques used and results obtained in this study form a basis for more detailed risk assessment at the local scale within the region. As development pressures diminish available land for various uses, risk-based land use decisions must be made to site critical facilities. To fulfill the study objectives a three phase study was designed including, (1) collection of subsidence data and compilation of a database, (2) performance of detailed studies of subsidence in three, two-to-five square-mile areas, and (3) synthesis of data obtained to; quantify the predominant sinkhole collapse dimensions, and identify events prior to subsidence or collapse events which may have caused the event, and estimate the intensity of subsidence as a function of geologic unit within subregional areas of higher and lower subsidence risk. 4 refs., 7 figs., 2 tabs.

  4. Evaluation of Pleistocene groundwater flow through fractured tuffs using a U-series disequilibrium approach, Pahute Mesa, Nevada, USA

    USGS Publications Warehouse

    Paces, James B.; Nichols, Paul J.; Neymark, Leonid A.; Rajaram, Harihar

    2013-01-01

    Groundwater flow through fractured felsic tuffs and lavas at the Nevada National Security Site represents the most likely mechanism for transport of radionuclides away from underground nuclear tests at Pahute Mesa. To help evaluate fracture flow and matrix–water exchange, we have determined U-series isotopic compositions on more than 40 drill core samples from 5 boreholes that represent discrete fracture surfaces, breccia zones, and interiors of unfractured core. The U-series approach relies on the disruption of radioactive secular equilibrium between isotopes in the uranium-series decay chain due to preferential mobilization of 234U relative to 238U, and U relative to Th. Samples from discrete fractures were obtained by milling fracture surfaces containing thin secondary mineral coatings of clays, silica, Fe–Mn oxyhydroxides, and zeolite. Intact core interiors and breccia fragments were sampled in bulk. In addition, profiles of rock matrix extending 15 to 44 mm away from several fractures that show evidence of recent flow were analyzed to investigate the extent of fracture/matrix water exchange. Samples of rock matrix have 234U/238U and 230Th/238U activity ratios (AR) closest to radioactive secular equilibrium indicating only small amounts of groundwater penetrated unfractured matrix. Greater U mobility was observed in welded-tuff matrix with elevated porosity and in zeolitized bedded tuff. Samples of brecciated core were also in secular equilibrium implying a lack of long-range hydraulic connectivity in these cases. Samples of discrete fracture surfaces typically, but not always, were in radioactive disequilibrium. Many fractures had isotopic compositions plotting near the 230Th-234U 1:1 line indicating a steady-state balance between U input and removal along with radioactive decay. Numerical simulations of U-series isotope evolution indicate that 0.5 to 1 million years are required to reach steady-state compositions. Once attained, disequilibrium 234U/238U and 230Th/238U AR values can be maintained indefinitely as long as hydrological and geochemical processes remain stable. Therefore, many Pahute Mesa fractures represent stable hydrologic pathways over million-year timescales. A smaller number of samples have non-steady-state compositions indicating transient conditions in the last several hundred thousand years. In these cases, U mobility is dominated by overall gains rather than losses of U.

  5. Air Pollution and Individual and Neighborhood Socioeconomic Status: Evidence from the Multi-Ethnic Study of Atherosclerosis (MESA)

    PubMed Central

    Diez-Roux, Ana V.; Adar, Sara D.; Auchincloss, Amy H.; Lovasi, Gina S.; O’Neill, Marie S.; Sheppard, Lianne; Kaufman, Joel D.

    2013-01-01

    Background: Although research has shown that low socioeconomic status (SES) and minority communities have higher exposure to air pollution, few studies have simultaneously investigated the associations of individual and neighborhood SES with pollutants across multiple sites. Objectives: We characterized the distribution of ambient air pollution by both individual and neighborhood SES using spatial regression methods. Methods: The study population comprised 6,140 participants from the Multi-Ethnic Study of Atherosclerosis (MESA). Year 2000 annual average ambient PM2.5 and NOx concentrations were calculated for each study participant’s home address at baseline examination. We investigated individual and neighborhood (2000 U.S. Census tract level) SES measures corresponding to the domains of income, wealth, education, and occupation. We used a spatial intrinsic conditional autoregressive model for multivariable analysis and examined pooled and metropolitan area–specific models. Results: A 1-unit increase in the z-score for family income was associated with 0.03-?g/m3 lower PM2.5 (95% CI: –0.05, –0.01) and 0.93% lower NOx (95% CI: –1.33, –0.53) after adjustment for covariates. A 1-SD–unit increase in the neighborhood’s percentage of persons with at least a high school degree was associated with 0.47-?g/m3 lower mean PM2.5 (95% CI: –0.55, –0.40) and 9.61% lower NOx (95% CI: –10.85, –8.37). Metropolitan area–specific results exhibited considerable heterogeneity. For example, in New York, high-SES neighborhoods were associated with higher concentrations of pollution. Conclusions: We found statistically significant associations of SES measures with predicted air pollutant concentrations, demonstrating the importance of accounting for neighborhood- and individual-level SES in air pollution health effects research. Citation: Hajat A, Diez-Roux AV, Adar SD, Auchincloss AH, Lovasi GS, O’Neill MS, Sheppard L, Kaufman JD. 2013. Air pollution and individual and neighborhood socioeconomic status: evidence from the Multi-Ethnic Study of Atherosclerosis (MESA). Environ Health Perspect 121:1325–1333;?http://dx.doi.org/10.1289/ehp.1206337 PMID:24076625

  6. Developing criteria for small on-site sewage treatment systems: Two case studies. Water resources investigation

    SciTech Connect

    King, J.P.; Fahmy, H.S.; Blair, A.W.; Jacquez, R.

    1992-10-01

    Two sites in Dona Ana County, the Lyons Country Estates Evapotranspiration (ET) bed and the Mesa Village sewage lagoons, were chosen as case study sites for evaluating the design criteria, operation, and impacts on groundwater of troubled on-site sewage systems.

  7. Metolachlor metabolite (MESA) reveals agricultural nitrate-N fate and transport in Choptank River watershed.

    PubMed

    McCarty, Gregory W; Hapeman, Cathleen J; Rice, Clifford P; Hively, W Dean; McConnell, Laura L; Sadeghi, Ali M; Lang, Megan W; Whitall, David R; Bialek, Krystyna; Downey, Peter

    2014-03-01

    Over 50% of streams in the Chesapeake Bay watershed have been rated as poor or very poor based on the index of biological integrity. The Choptank River estuary, a Bay tributary on the eastern shore, is one such waterway, where corn and soybean production in upland areas of the watershed contribute significant loads of nutrients and sediment to streams. We adopted a novel approach utilizing the relationship between the concentration of nitrate-N and the stable, water-soluble herbicide degradation product MESA {2-[2-ethyl-N-(1-methoxypropan-2-yl)-6-methylanilino]-2-oxoethanesulfonic acid} to distinguish between dilution and denitrification effects on the stream concentration of nitrate-N in agricultural subwatersheds. The ratio of mean nitrate-N concentration/(mean MESA concentration * 1000) for 15 subwatersheds was examined as a function of percent cropland on hydric soil. This inverse relationship (R(2)=0.65, p<0.001) takes into consideration not only dilution and denitrification of nitrate-N, but also the stream sampling bias of the croplands caused by extensive drainage ditch networks. MESA was also used to track nitrate-N concentrations within the estuary of the Choptank River. The relationship between nitrate-N and MESA concentrations in samples collected over three years was linear (0.95 ? R(2) ? 0.99) for all eight sampling dates except one where R(2)=0.90. This very strong correlation indicates that nitrate-N was conserved in much of the Choptank River estuary, that dilution alone is responsible for the changes in nitrate-N and MESA concentrations, and more importantly nitrate-N loads are not reduced in the estuary prior to entering the Chesapeake Bay. Thus, a critical need exists to minimize nutrient export from agricultural production fields and to identify specific conservation practices to address the hydrologic conditions within each subwatershed. In well drained areas, removal of residual N within the cropland is most critical, and practices such as cover crops which sequester the residual N should be strongly encouraged. In poorly drained areas where denitrification can occur, wetland restoration and controlled drained structures that minimize ditch flow should be used to maximize denitrification. PMID:24388901

  8. FINNIGAN WAY EAST BOULEVARD

    E-print Network

    Rollins, Andrew M.

    URRAY HILL ADELBERT C E D A R EUCLI D H EIGHTS EDGEHILL CORN ELL MAYFIELD PARK LANE E.107 E.105 E.101 E DIRECTORY A B C D E F G 1 2 3 4 5 6 7 CASE WESTERN RESERVE Case School of Engineering (Nord HallFINNIGAN WAY WADE PARK MAGNOLIA EAST BOULEVARD WA DE O VAL J E P T H A EASTBOULEVARD JUNIPE R FORD

  9. FINNIGAN WAY EAST BOULEVARD

    E-print Network

    Rollins, Andrew M.

    URRAY HILL ADELBERT C E D A R EUCLI D H EIGHTS EDGEHILL CORN ELL MAYFIELD PARK LANE E.107 E.105 E.101 ETrack SOUTH RESIDENTIAL VILLAGE Wyant Field House (Opens 2014) Triangle Apartments DIRECTORY A B C D E F G 1 2FINNIGAN WAY WADE PARK MAGNOLIA EAST BOULEVARD WA DE O VAL J E P T H A EASTBOULEVARD JUNIPE R FORD

  10. The East Village

    NSDL National Science Digital Library

    Internauts with time and bandwidth to spare might want to try out the new cyber soap opera from Marinex Multimedia, The East Village. In addition to photographs and audio and video clips, this soap allows you to join the "cyber clique" of a favorite character (after registering, of course). Once in a "clique," you will receive "secret email" from that character that gives you information not in the story line. Chat rooms are also available.

  11. East Mountain Area 1995 air sampling results

    SciTech Connect

    Deola, R.A. [Sandia National Labs., Albuquerque, NM (United States). Air Quality Dept.

    1996-09-01

    Ambient air samples were taken at two locations in the East Mountain Area in conjunction with thermal testing at the Lurance Canyon Burn Site (LCBS). The samples were taken to provide measurements of particulate matter with a diameter less than or equal to 10 micrometers (PM{sub 10}) and volatile organic compounds (VOCs). This report summarizes the results of the sampling performed in 1995. The results from small-scale testing performed to determine the potentially produced air pollutants in the thermal tests are included in this report. Analytical results indicate few samples produced measurable concentrations of pollutants believed to be produced by thermal testing. Recommendations for future air sampling in the East Mountain Area are also noted.

  12. Unocal schedules field development off East Kalimantan

    SciTech Connect

    Not Available

    1992-12-07

    Unocal Indonesia Ltd. has let a turnkey contract to PT Gema SemBrown (GSB) to build a platform to set in the deepest water yet off Indonesia. This paper reports on the contract, which is worth more than $40 million, and calls for GSB to engineer, procure, fabricate, install, and hook up Unocal's SA drilling and production platform in 335 ft of water in Serang field. Site is in Makassar Strait, about 25 miles off East Kalimantan. GSB in October began fabricating the Serang SA platform at its Sunda Strait fabrication yard in West Java, Indonesia. GSB is to complete the platform on a fast track schedule in time for installation in July 1993. The project includes two export trunk lines connecting Serang field with Unocal's Melahin field. Production will come ashore at Santan on East Kalimantan.

  13. East Asian observations

    NASA Astrophysics Data System (ADS)

    Stephenson, F. R.

    East Asian observations are of established importance in Applied Historical Astronomy. The earliest astronomical records from this part of the world (China, Japan and Korea) originate from China. These observations, mainly of lunar eclipses, are recorded on oracle bones from the period ca. 1300 - 1050 BC. Virtually all later Chinese and other East Asian astronomical records now exist only in printed copies. The earliest surviving series of solar eclipse observations from any part of the world is contained in the Chunqiu (722 - 481 BC), a chronicle of the Chinese state of Lu. However, not until after 200 BC, with the establishment of a stable empire in China, do detailed astronomical records survive. These are mainly contained in specially compiled astrological treatises in the official dynastic histories. Such records, following the traditional style, extend down to the start of the present century. All classes of phenomena visible to the unaided eye are represented: solar and lunar eclipses, lunar and planetary movements among the constellations, comets, novae and supernovae, meteors, sunspots and the aurora borealis. Parallel, but independent series of observations are recorded in Japanese and Korean history, especially after about AD 800. Sources of Japanese records tend to be more diverse than their Chinese and Korean counterparts, but fortunately Kanda Shigeru (1935) and Ohsaki Shyoji (1994) have made extensive compilations of Japanese astronomical observations down to the 1860s. Throughout East Asia, dates were expressed in terms of a luni-solar calendar.

  14. Site Alias Rifle Creeks Site Alias Rifle Gap Network of Conservation Areas (NCA) NCA Site ID NCA Site Name NCA Site Code - No Data Site Relations No Data LOCATORS

    Microsoft Academic Search

    2009-01-01

    approximately 1\\/8 mile west of the perennial stream and riparian habitat of East Rifle Creek. The site includes the slopes on both sides of the creek with the boundary climbing to approximately the elevation of the mine. The boundary continues north along the riparian communities of East Rifle Creek where patches of boxelder and willow are found. The area upslope

  15. 77 FR 4058 - Notice of Intent To Collect Fees on Public Land in Mesa County, CO Under the Federal Lands...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-26

    ...Land in Mesa County, CO Under the Federal Lands Recreation Enhancement Act AGENCY: Bureau of Land Management, Interior. ACTION...to applicable provisions of the Federal Lands Recreation Enhancement Act (REA), the Bureau of Land Management's (BLM)...

  16. Strategic Research Orientation `NanoMaterials for Energy' 1 Energy projects within MESA+ research groups, February 2013

    E-print Network

    Twente, Universiteit

    Strategic Research Orientation `NanoMaterials for Energy' 1 Energy projects within MESA+ research groups, February 2013 Strategic Research Orientation `NanoMaterialsD's/Postdoc Supervisor Solar Fuels Photocatalytic Nanomaterials IMS Wouter

  17. Facies, depositional environments, and reservoir properties of the Shattuck sandstone, Mesa Queen Field and surrounding areas, southeastern New Mexico 

    E-print Network

    Haight, Jared

    2004-09-30

    ) _________________________ _________________________ Wayne M. Ahr Andrew Hajash, Jr. (Member) (Head of Department) August 2002 Major Subject: Geology iii ABSTRACT Facies, Depositional Environments, and Reservoir Properties of the Shattuck Sandstone, Mesa Queen Field...

  18. Oceanography of East Madagascar

    NASA Astrophysics Data System (ADS)

    Bemiasa, John

    2014-05-01

    During six week survey (August - September 2008) in Southern and Eastern coast of Madagascar, the R/V 'Dr. Fridtjof Nansen' has carried out a study of the pelagic ecosystem. In collaboration with Agulhas & Somali Current Large Marine Ecosystems project (ASCLME) and South West Indian Ocean Fisheries Project (SWIOFP), the aim of the survey was to establish the physical, chemical and biological characteristics of the Western Madagascar shelf region as a whole. A total of 102 CTD stations were conducted along selected hydrographical transects and ranged to a maximum of 3000 m depth. Water samples were also collected with Niskin bottles at predefined depths. A Seabird 911plus CTD was used to obtain vertical profiles of temperature, salinity and oxygen. As results, the first section between latitude 25o-26oS showed sea surface temperature values ranging between 25oC to 15oC upper 250m depth. As part of the south-west, the shelf is narrow and widen slightly along the tip south of the Island coast. In contrast of the west coast, in all transects performed along the south and the east coast, in most cases, the isotherms showed non stratified waters from the coast to offshore. The presence of the upwelling system in the south-east coast modifies drastically the patterns of all measured parameters. Fluorescence had a maximum values (0.25 µg/l) at surface near the coast in 2nd to 5th transects. Inversely, low temperature values were observed along the south and south-east with minimum values in the range of 18. 5oC-11oC at 50-250 m depth. These conditions were consistent along and between the 2nd to 5th transects, with more variation observed at transect 5. The salinity values (5 m depth) decreased from 35.7 psu in the south to 34.5 psu in the east. The horizontal distribution of oxygen showed non homogenous conditions with values between 5 ml/l (south) and 2.5 ml/l (south-east). Also starting from the coast to offshore, surface temperatures and surface salinities, surface fluorescence and dissolved oxygen showed non homogenous patterns.

  19. Analysis of Well ER-EC-2a Testing, Western Pahute Mesa-Oasis Valley FY 2000 Testing Program

    SciTech Connect

    none,

    2002-09-30

    This report documents the analysis of the data collected for Well ER-EC-2a during the Western Pahute Mesa - Oasis Valley (WPM-OV) well development and testing program that was conducted during fiscal year (FY) 2000. The data collection for that program is documented in Appendix A, Western Pahute Mesa - Oasis Valley, Well ER-EC-2a Data Report for Development and Hydraulic Testing.

  20. Analysis of Well ER-EC-5 Testing, Western Pahute Mesa-Oasis Valley FY 2000 Testing Program

    SciTech Connect

    none,

    2002-09-30

    This report documents the analysis of the data collected for Well ER-EC-5 during the Western Pahute Mesa - Oasis Valley (WPM-OV) well development and testing program that was conducted during fiscal year (FY) 2000. The data collection for that program is documented in Appendix A, Western Pahute Mesa - Oasis Valley, Well ER-EC-5 Data Report for Development and Hydraulic Testing.

  1. Analysis of Well ER-EC-8 testing, Western Pahute Mesa-Oasis Valley FY 2000 testing program

    SciTech Connect

    none,

    2002-09-30

    This report documents the analysis of the data collected for Well ER-EC-8 during the Western Pahute Mesa - Oasis Valley (WPM-OV) well development and testing program that was conducted during fiscal year (FY) 2000. The data collection for that program is documented in Appendix A, Western Pahute Mesa-Oasis Valley, Well ER-EC-8 Data Report for development and Hydraulic Testing.

  2. Analysis of Well ER-EC-1 Testing, Western Pahute Mesa-Oasis Valley FY 2000 Testing Program

    SciTech Connect

    none,

    2002-09-30

    This report documents the analysis of the data collected for Well ER-EC-1 during the Western Pahute Mesa - Oasis Valley (WPM-OV) well development and testing program that was conducted during fiscal year (FY) 2000. The data collection for that program is documented in Appendix A, Western Pahute Mesa - Oasis Valley, Well ER-EC-1 Data Report for Development and Hydraulic Testing.

  3. Cavity mode waves during terahertz radiation from rectangular Bi(2)Sr(2)CaCu(2)O(8 + ?) mesas.

    PubMed

    Klemm, Richard A; Laberge, Erica R; Morley, Dustin R; Kashiwagi, Takanari; Tsujimoto, Manabu; Kadowaki, Kazuo

    2011-01-19

    We re-examined the angular dependence of the radiation from the intrinsic Josephson junctions in rectangular mesas of Bi(2)Sr(2)CaCu(2)O(8 + ?), in order to determine if the cavity mode part of the radiation arises from waves across the width w or along the length l of the mesas, associated with 'hot spots' (Wang et al 2010 Phys. Rev. Lett. 105 057002). We derived analytical forms for the angular dependence expected in both cases for a general cavity mode in which the width of the mesa corresponds to an integer multiple of one-half the wavelength of the radiation. Assuming the coherent radiation from the ac Josephson current source and the cavity magnetic surface current density source combine incoherently, fits to the data of Kadowaki et al (2010 J. Phys. Soc. Japan 79 023703) on a mesa with mean l/? = 5.17 for both wave directions using two models for the incoherent combination were made, which correspond to standing and traveling waves, respectively. The results suggest that the combined output from the uniform ac Josephson current source plus a cavity wave forming along the rectangle length is equally probable as that of the combined output from the uniform ac Josephson current plus a cavity wave across the width. However, for mesas in which nl/2? is integral, where n is the index of the rectangular TM(z)(n, 0) mode, it is shown that standing cavity mode waves along the length of the mesa do not radiate in the xz plane perpendicular to the length of the mesa, suggesting experiments on such mesas could help to resolve the question. PMID:21406846

  4. Mobilization of actinides by dissolved organic compounds at the Nevada Test Site

    Microsoft Academic Search

    Pihong Zhao; Mavrik Zavarin; Roald N. Leif; Brian A. Powell; Michael J. Singleton; Rachel E. Lindvall; Annie B. Kersting

    2011-01-01

    The effect of dissolved organic matter (DOM) on Am(III), Pu(IV), Np(V), and U(VI) sorption was investigated with natural water (pH ?8) and zeolitized tuff samples collected from the Rainier Mesa tunnel system, Nevada Test Site, where the USA detonated underground nuclear tests prior to 1992. Perched vadose zone water at Rainier Mesa has high levels of DOM as a result

  5. Diarrhoea and effects of different water sources, sanitation and hygiene behaviour in East Africa

    Microsoft Academic Search

    James K. Tumwine; John Thompson; Munguti Katua-Katua; Mark Mujwajuzi; Nick Johnstone; Elizabeth Wood; Ina Porras

    2002-01-01

    published studies on domestic water use and environmental health in East Africa, based on direct observations or other reliable research methods. The objective of this study was to carry out a repeat analysis of domestic water use and environmental health in East Africa based on DOW I. The study was conducted in the same sites as DOW I. Field assistants

  6. United Nations Transitional Administration in East Timor: UNTAET

    NSDL National Science Digital Library

    This new site from the United Nations offers a large collection of primary documents related to the history and future of East Timor. A June 11, 1999 Security Council Resolution (1246) established the United Nations Mission in East Timor (UNAMET), which is charged with organizing and conducting a "popular consultation" (scheduled for August 8) to determine the territory's future status. At the site, users can read the full text of the agreement between Indonesia and Portugal that set the groundwork for this consultation, as well as the official UN documents concerning East Timor (reports, resolutions, discussions), press briefings and releases (1996-99). Fifteen audio reports from UN Radio are also provided, although several were unavailable at time of writing.

  7. East Antarctic ice-sheet dynamics between 5.2 and 0 Ma from a high-resolution terrigenous particle size record, ODP Site 1165, Prydz Bay-Cooperation Sea

    USGS Publications Warehouse

    Passchier, S.

    2007-01-01

    This paper discusses a 5.2-0 Ma high-resolution terrigenous particle size record recovered from a sediment drift off East Antarctica. The particle size properties of Hole 1165B are interpreted in the context of previously acquired data on a continental shelf to slope transect drilled by ODP Leg 188 in Prydz Bay and the Cooperation Sea. The new data indicate that the Lambert ice stream stayed predominantly landward of the shelf break in the early Pliocene (5.2-3.5 Ma) with periods of ice sheet recession on land. The middle Pliocene (3.5-3.1 Ma) is characterized as major ice expansion during glacials with deposition of laminated clays from meltwater plumes on the continental rise, alternating with periods of ice recession. A change in sedimentary facies and a decrease in sedimentation rates occurred at ~3.1 Ma indicating a more retreated Lambert Glacier. Between 2.5 and 1 Ma the ice stream was generally stable and had become cold-based with ice flow in a glacial trough extending to the shelf break. Three-four large pulses of coarse-grained glacigenic debris mark the record at ~1 Ma. These are interpreted as extensive calving due to decoupling of the marine terminus from its bed in response to Northern Hemisphere deglaciations and associated sea level rises.

  8. East Asian Security in 2025 

    E-print Network

    Heavin, Reagan; Hudson, Adam; Krueger, Brandon; O'Neil, Sean; Rozell, Griffin; Suma, Matt

    2008-01-01

    : Competition, Cooperation, Plateau? Reagan Heavin Adam Hudson Brandon Krueger Sean O’Neil Griffin Rozell Matt Suma 24 April 2008 East Asian Security in 2025 Agenda • Conclusions • Projections • Drivers • Four Outcomes • Questions East Asian Security in 2025... Security in 2025 Drivers • Economic Growth – Energy – Demographics – State capacity • Chinese Foreign Policy – Regional relations – Military strategy • US Reaction East Asian Security in 2025 Four Outcomes for Asia in 2025 Outcome 1: Sino...

  9. East African Rift Valley, Kenya

    NASA Technical Reports Server (NTRS)

    1990-01-01

    This rare, cloud free view of the East African Rift Valley, Kenya (1.5N, 35.5E) shows a clear view of the Turkwell River Valley, an offshoot of the African REift System. The East African Rift is part of a vast plate fracture which extends from southern Turkey, through the Red Sea, East Africa and into Mozambique. Dark green patches of forests are seen along the rift margin and tea plantations occupy the cooler higher ground.

  10. East Africa continental margins

    SciTech Connect

    Bosellini, A.

    1986-01-01

    New well data from Somalia, together with the history of sea-floor spreading in the Indian Ocean derived from magnetic anomalies, show that the East African margins from latitude 15/sup 0/S into the Gulf of Aden comprise four distinct segments that formed successively by the southward drift of Madagascar from Somalia during the Middle to Late Jurassic and Early Cretaceous, by the northeastward drift of India along the Owen Transform during the Late Cretaceous and Paleocene, and by the opening of the Gulf of Aden during the Neogene.

  11. MISSE-7 MESA Miniaturized Electrostatic Analyzer - Ion Spectra Analysis Preliminary Results

    NASA Astrophysics Data System (ADS)

    Enloe, C. L.; Balthazor, R. L.; McHarg, M. G.; Clark, A. L.; Waite, D.; Wallerstein, A. J.; Wilson, K. A.

    2011-12-01

    The 7th Materials on the International Space Station Experiment (MISSE-7) was launched in November 2009 and retrieved on STS-134 in April 2011. One of the onboard experiments, the Miniaturized Electrostatic Analyzer (MESA), is a small low-cost low-size/weight/power ion and electron spectrometer that was pointed into ram during the majority of the time onboard. Over 800 Mb of data has been obtained by taking spectra every three minutes on-orbit. The data has been analyzed with a novel "parameterizing the parameters" method suitable for on-orbit data analysis using low-cost microcontrollers. Preliminary results are shown.

  12. Magnetotelluric study of the Pahute Mesa and Oasis Valley regions, Nye County, Nevada

    USGS Publications Warehouse

    Schenkel, Clifford J.; Hildenbrand, Thomas G.; Dixon, Gary L.

    1999-01-01

    Magnetotelluric data delineate distinct layers and lateral variations above the pre-Tertiary basement. On Pahute Mesa, three resistivity layers associated with the volcanic rocks are defined: a moderately resistive surface layer, an underlying conductive layer, and a deep resistive layer. Considerable geologic information can be derived from the conductive layer which extents from near the water table down to a depth of approximately 2 km. The increase in conductivity is probably related to zeolite zonation observed in the volcanic rock on Pahute Mesa, which is relatively impermeable to groundwater flow unless fractured. Inferred faults within this conductive layer are modeled on several profiles crossing the Thirsty Canyon fault zone. This fault zone extends from Pahute Mesa into Oasis Valley basin. Near Colson Pond where the basement is shallow, the Thirsty Canyon fault zone is several (~2.5) kilometers wide. Due to the indicated vertical offsets associated with the Thirsty Canyon fault zone, the fault zone may act as a barrier to transverse (E-W) groundwater flow by juxtaposing rocks of different permeabilities. We propose that the Thirsty Canyon fault zone diverts water southward from Pahute Mesa to Oasis Valley. The electrically conductive nature of this fault zone indicates the presence of abundant alteration minerals or a dense network of open and interconnected fractures filled with electrically conductive groundwater. The formation of alteration minerals require the presence of water suggesting that an extensive interconnected fracture system exists or existed at one time. Thus, the fractures within the fault zone may be either a barrier or a conduit for groundwater flow, depending on the degree of alteration and the volume of open pore space. In Oasis Valley basin, a conductive surface layer, composed of alluvium and possibly altered volcanic rocks, extends to a depth of 300 to 500 m. The underlying volcanic layer, composed mostly of tuffs, fills the basin with about 3-3.5 km of relief on basement. A fault zone, related to the southern margin of the basin, appears to extend up to a depth of about 500 m. The path of groundwater encountering this fault zone is uncertain but may be either to the southwest towards Beatty or to the south towards Crater Flat.

  13. Cutoff-mesa isolated rib optical waveguide for III-V heterostructure photonic integrated circuits

    DOEpatents

    Vawter, G.A.; Smith, R.E.

    1998-04-28

    A cutoff mesa rib waveguide provides single-mode performance regardless of any deep etches that might be used for electrical isolation between integrated electrooptic devices. Utilizing a principle of a cutoff slab waveguide with an asymmetrical refractive index profile, single mode operation is achievable with a wide range of rib widths and does not require demanding etch depth tolerances. This new waveguide design eliminates reflection effects, or self-interference, commonly seen when conventional rib waveguides are combined with deep isolation etches and thereby reduces high order mode propagation and crosstalk compared to the conventional rib waveguides. 7 figs.

  14. Cutoff-mesa isolated rib optical waveguide for III-V heterostructure photonic integrated circuits

    DOEpatents

    Vawter, Gregory A. (Albuquerque, NM); Smith, Robert E. (Albuquerque, NM)

    1998-01-01

    A cutoff mesa rib waveguide provides single-mode performance regardless of any deep etches that might be used for electrical isolation between integrated electrooptic devices. Utilizing a principle of a cutoff slab waveguide with an asymmetrical refractive index profile, single mode operation is achievable with a wide range of rib widths and does not require demanding etch depth tolerances. This new waveguide design eliminates reflection effects, or self-interference, commonly seen when conventional rib waveguides are combined with deep isolation etches and thereby reduces high order mode propagation and crosstalk compared to the conventional rib waveguides.

  15. Shuttle crew escape systems (CES) rocket test at Hurricane Mesa, Utah

    NASA Technical Reports Server (NTRS)

    1987-01-01

    Shuttle crew escape systems (CES) tractor rocket tests conducted at Hurricane Mesa, Utah. This preliminary ground test of the tractor rocket will lead up to in-air evaluations. View shows tractor rocket as it is fired from side hatch mockup. The tractor rocket concept is one of two escape methods being studied to provide crew egress capability during Space Shuttle controlled gliding flight. In-air tests of the system, utilizing a Convair-240 aircraft, will begin 11-19-87 at the Naval Weapons Center in China Lake, California.

  16. 49. EAST TO DETAIL OF EAST INTERIOR WALL OF WELLSERVICE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    49. EAST TO DETAIL OF EAST INTERIOR WALL OF WELL-SERVICE SHED ADDITION ON REAR OF FACTORY BUILDING. HANGING FROM AND LEANING AGAINST THE WALL ARE TOOLS USED IN WATER WELL SERVICE, SUCH AS BAILER, 'FISHING' TOOLS, WINDMILL AND STEEL TOWER PARTS, CHAINS, WRENCHES, PULLEYS, ROPE, AND SAFETY BELT. - Kregel Windmill Company Factory, 1416 Central Avenue, Nebraska City, Otoe County, NE

  17. East wing. Oblique view of east side looking south along ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    East wing. Oblique view of east side looking south along Presidio Avenue, at street level. This view includes rear door and other features not visible in photo CA-2724-6. - Jewish Community Center of San Francisco, 3200 California Street, San Francisco, San Francisco County, CA

  18. VIEW OF UPSTREAM (EAST) SIDES OF UPPER (EAST) END OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF UPSTREAM (EAST) SIDES OF UPPER (EAST) END OF LOCK, SOUTHEAST AND NORTHEAST CONTROL HOUSES, LOCK UNDER REPAIR, BUILDING NOS. 51, 52 AND SOUTHWEST CONTROL HOUSE IN BACKGROUND, VIEW TOWARDS WEST-NORTHWEST - Ortona Lock, Lock No. 2, Machinery and Control Houses, Caloosahatchee River, Cross-State Canal, Okeechobee Intracoastal Waterway, Ortona, Glades County, FL

  19. 1. GENERAL VIEW OF BUILDING 149, SHOWING EAST AND SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. GENERAL VIEW OF BUILDING 149, SHOWING EAST AND SOUTH SIDES; BUILDING 162 IS VISIBLE AT FAR LEFT; BUILDING 181 IS VISIBLE AT RIGHT; OPEN AREA AT RIGHT CENTER WAS SITE OF LIVESTOCK HOLDING BUILDINGS - Rath Packing Company, Beef Killing Building, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

  20. 10. View west of east entry to filtration beds. Note ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. View west of east entry to filtration beds. Note monitor roof and clerestory windows over central corridor. Laboratory building is sited over the center of the filtration bed building at extreme left center of photograph. - Lake Whitney Water Filtration Plant, Filtration Plant, South side of Armory Street between Edgehill Road & Whitney Avenue, Hamden, New Haven County, CT

  1. 46. HISTORIC AERIAL VIEW LOOKING EAST AT THE REDSTONE TEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    46. HISTORIC AERIAL VIEW LOOKING EAST AT THE REDSTONE TEST SITE, SHOWING THE TEST STAND, SUPPORT EQUIPMENT, SERVICE AREA AND THE OBSERVATION TANKS BURIED BENEATH THE EARTH MOUND IN THE BACKGROUND. - Marshall Space Flight Center, Redstone Rocket (Missile) Test Stand, Dodd Road, Huntsville, Madison County, AL

  2. Uranium-series dating rock art in East Timor

    Microsoft Academic Search

    Maxime Aubert; Sue O'Connor; Malcolm McCulloch; Graham Mortimer; Alan Watchman; Marc Richer-LaFlèche

    2007-01-01

    At many sites throughout the world rock art paintings have been covered by naturally deposited calcite laminations, which we demonstrate can be individually dated by recently improved uranium-series methods. Here we report the application of multi-collector inductively coupled plasma mass spectrometry to measure the ages for carbonate coatings that bracket red pigment at Lene Hara cave, East Timor, which could

  3. 18. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. John and James Dobson Carpet Mill, East and West parcels, site plan-lower left, and surrounding environs, 1925. Bromley, George Washington and Bromley, Walter Scott. Atlas of the City of Philadelphia (North Philadelphia), Philadelphia, Pennsylvania: George W. and Walter S. Bromley, 1925, p. 106. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  4. OVERVIEW OF NUCLEAR PHYSICS LABORATORY (IMMEDIATELY EAST OF SPSE REACTOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    OVERVIEW OF NUCLEAR PHYSICS LABORATORY (IMMEDIATELY EAST OF SP-SE REACTOR ROOM), LEVEL -15?, LOOKING SOUTHWEST. NOTE SLIDING STEEL PLATE DOOR BETWEEN LABORATORY AND REACTOR ROOM - Physics Assembly Laboratory, Area A/M, Savannah River Site, Aiken, Aiken County, SC

  5. View from east to west of family housing unit (twobedroom ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View from east to west of family housing unit (two-bedroom duplex; #48A & 48B). This structure was located on 8th Street south. No housing sites remain on the ground - Stanley R. Mickelsen Safeguard Complex, Family Housing Units, In area bounded by Tenth Street North, Avenue A, & Avenue J, Nekoma, Cavalier County, ND

  6. VIEW OF EAST BANK OF ?SAFETY ROD PACKAGE,? INCLUDING SAFETY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF EAST BANK OF ?SAFETY ROD PACKAGE,? INCLUDING SAFETY ROD MOTOR DRIVES (B AND C), DRUMS, AND CLUTCHES, IN A THREE-TIERED RACK IN THE PDP ROOM AT LEVEL +27?, LOOKING SOUTHEAST - Physics Assembly Laboratory, Area A/M, Savannah River Site, Aiken, Aiken County, SC

  7. 3. VIEW EAST OF MILL STREET BUILDINGS; 20 AT EXTREME ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. VIEW EAST OF MILL STREET BUILDINGS; 20 AT EXTREME LEFT CENTER; 21 AT MID-LEFT CENTER; 4 AT LEFT CENTER; RUNDBOGENSTIL TOWER AT CENTER; BUILDING 3 RIGHT CENTER; BUILDING 2 AT EXTREME RIGHT CENTER; BUILDING 3 IS THE OLDEST BUILDING ON SITE AND WAS BUILT CIRCA 1850 - Scovill Brass Works, 59 Mill Street, Waterbury, New Haven County, CT

  8. East Pacific Rise: Hot Springs and Geophysical Experiments

    Microsoft Academic Search

    F. N. Spiess; Ken C. MacDonald; T. Atwater; R. Ballard; A. Carranza; D. Cordoba; C. Cox; V. M. Diaz Garcia; J. Francheteau; J. Guerrero; J. Hawkins; R. Haymon; R. Hessler; T. Juteau; M. Kastner; R. Larson; B. Luyendyk; J. D. MacDougall; S. Miller; W. Normark; J. Orcutt; C. Rangin

    1980-01-01

    Hydrothermal vents jetting out water at 380 degrees ± 30 degrees C have been discovered on the axis of the East Pacific Rise. The hottest waters issue from mineralized chimneys and are blackened by sulfide precipitates. These hydrothermal springs are the sites of actively forming massive sulfide mineral deposits. Cooler springs are clear to milky and support exotic benthic communities

  9. Aerosol Absorption Near Beijing During EAST-AIRE

    Microsoft Academic Search

    M. Yang; S. Howell; B. Huebert; J. Zhuang

    2006-01-01

    To understand the aerosol absorption that had been observed offshore during ACE-Asia, we took a suite of instruments (including a 7 wavelength aethalometer) to a site 70 km ESE of Beijing in March of 2005 to measure the wavelength dependence of aerosol absorption as a part of the EAST-AIRE program. Confidence in filter methods suffers a bit because several corrections

  10. Travelers in the Middle East Archive

    NSDL National Science Digital Library

    As Edward Said demonstrated in his landmark work, Orientalism, the ways in which the Middle East has been represented by outsiders (particularly those in the West) has had a tremendous influence on how this region of the world has been viewed by others. For anyone with an interest in Western interactions with the Middle East, this fascinating and engaging online digital archive includes travel guides written by Western visitors, photographic and hand-drawn images of Egypt, and some interactive GIS maps of both Egypt and Cyprus. With funding from the Institute of Museum and Library Services, the Travelers in the Middle East Archive (TIMEA) includes over 15,000 pages of text, 800 images, and 150 historical maps. Visitors with an interest in how such projects are created and maintained will also appreciate their papers and presentations section, which includes pieces on their work. Along with other materials included here, one of the highlights of the site must certainly be a first-hand account of travels through Palestine and environs written by H. Rider Haggard, who is probably best known for his series of late 19th century adventure novels set in Africa.

  11. 16. VIEW OF OFFICE/CLASSROOM AND DORMITORY, LOOKING EAST Everett Weinreb, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. VIEW OF OFFICE/CLASSROOM AND DORMITORY, LOOKING EAST Everett Weinreb, photographer, March 1988 - Los Pinetos Nike Missile Site, Santa Clara Road, Los Angeles National Forest, Sylmar, Los Angeles County, CA

  12. 15. VIEW LOOKING EAST AT UNDERGROUND VAULT, BUILDING 997, UNDER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. VIEW LOOKING EAST AT UNDERGROUND VAULT, BUILDING 997, UNDER CONSTRUCTION. THE VAULTS WERE USED TO STORE TRIGGERS AWAITING OFF-SITE SHIPMENT, OR RETURNED TRIGGERS AWAITING TO BE TRANSPORTED TO A BUILDING FOR RECOVERY OF THE PLUTONIUM. THE VAULT WALLS WERE CONSTRUCTED 14.5 FEET THICK. BUILDING 991, IN THE BACKGROUND, WAS THE FIRST OPERATIONAL BUILDING ON SITE (2/1/52). - Rocky Flats Plant, Bounded by Indiana Street & Routes 93, 128 & 72, Golden, Jefferson County, CO

  13. In situ measurements of trace gases and aerosol optical properties at a rural site in northern China during East Asian Study of Tropospheric Aerosols: An International Regional Experiment 2005

    Microsoft Academic Search

    Lackson T. Marufu; Russell R. Dickerson; Zhanqing Li; Tianxue Wen; Yuesi Wang; Pucai Wang; Hongbin Chen; Jeffrey W. Stehr

    2007-01-01

    In situ measurements of trace gases and aerosol optical properties were made in March 2005 at Xianghe (39.798°N, 116.958°E, 35 m), a rural site about 70 km southeast, and generally downwind of the Beijing metropolitan area. High pollutant levels were observed during the experiment, with CO (1.09 ± 1.02 ppmv, average ± standard deviation), SO2 (17.8 ± 15.7 ppbv), NOy

  14. In situ measurements of trace gases and aerosol optical properties at a rural site in northern China during East Asian Study of Tropospheric Aerosols: An International Regional Experiment 2005

    Microsoft Academic Search

    Lackson T. Marufu; Russell R. Dickerson; Zhanqing Li; Tianxue Wen; Yuesi Wang; Pucai Wang; Hongbin Chen; Jeffrey W. Stehr

    2007-01-01

    In situ measurements of trace gases and aerosol optical properties were made in March 2005 at Xianghe (39.798°N, 116.958°E, 35 m), a rural site about 70 km southeast, and generally downwind of the Beijing metropolitan area. High pollutant levels were observed during the experiment, with CO (1.09 +\\/- 1.02 ppmv, average +\\/- standard deviation), SO2 (17.8 +\\/- 15.7 ppbv), NOy

  15. Geologic effects of the Greeley event, Nevada Test site

    USGS Publications Warehouse

    Dickey, Dayton Delbert; Jenkins, E.C.; McKeown, F.A.; Lee, W.H.

    1969-01-01

    The intermediate yield Greeley event, in which a nuclear device was detonated at a depth of 3,990 feet in Pahute Mesa at the Nevada Test Site, caused fracturing in rocks and spalling of rock from cliffs as far as 3 and 8 miles, respectively, from the detonation point.

  16. Exploration for uranium deposits in the Atkinson Mesa area, Montrose County, Colorado

    USGS Publications Warehouse

    Brew, Daniel Allen

    1954-01-01

    The U.S. Geological Survey explored the Atkinson Mesa area for uranium- and vanadium-bearing deposits from July 2, 1951, to June 18, 1953, with 397 diamond-drill holes that totaled 261,251 feet. Sedimentary rocks of Mesozoic age are exposed in the Atkinson Mesa area. They are: the Brushy Basin member of the Upper Jurassic Morrison formation, the Lower Cretaceous Burro Canyon formation, and the Upper and Lower Cretaceous Dakota sandstone. All of the large uranium-vanadium deposits discovered by Geological Survey drilling are in a series of sandstone lenses in the upper part of the Salt Wash member of the Jurassic Morrison formation. The deposits are mainly tabular and blanket-like, but some elongate pod-shaped masses, locally called "rolls" may be present. The mineralized material consists of sandstone impregnated with a uranium mineral which is probably coffinite, spme carnotite, and vanadium minerals, thought to be mainly corvusite and montroseite. In addition,, some mudstone and carbonaceous material is similarly impregnated. Near masses of mineralized material the sandstone is light gray or light brown, is generally over 40 feet thick, and usually contains some carbonaceous material and abundant disseminated pyrite or limonite stain. Similarly, the mudstone in contact with the ore-bearing sandstone near bodies of mineralized rock is commonly blue gray, as compared to its dominant red color away from ore deposits. Presence and degree of these features are useful guides in exploring for new deposits.

  17. Constructing Mass-radius Relationships of Low Mass Gaseous Exoplanets with MESA

    NASA Astrophysics Data System (ADS)

    Chen, Howard; Rogers, Leslie

    2015-01-01

    To date, over 3500 exoplanets and planetary candidates have been discovered. This astonishing feat allows us to answer a cornerstone question in astronomy and planetary science: what are these 'other worlds' in the solar neighborhood like? Apart from characterization efforts based on observations, a good avenue to explore is to use computer simulations to model the planets' atmospheres and interiors under the influence of stellar irradiation. We present a prescription to extend the stellar evolution code MESA (Modules for Experimental Stellar Astrophysics) to model the thermal evolution of low mass exoplanets having hydrogen-helium envelopes. With the addition of routines treating the planet core luminosity, heavy element enrichment, and mass loss due to hydrodynamic winds, the evolutionary pathways of planets with diverse properties are accurately constrained. Using these dynamic models, we construct mass-radius relationships of planets from 1 to 300 MEarth with varying ages, energy flux received, envelope metallicity and opacity. These relations are benchmarked against previous theoretical studies and the current census of observed planets. In doing so, we demonstrate MESA's ability to incorporate these planetary phenomena in its 1D numerical computations. We anticipate that this versatile, user-friendly code will see widespread applications in complementing future exoplanetary surveys such as K-2, TESS, and PLATO.

  18. Broadband Marine Magnetotelluric Exploration of the East Pacific Rise at 9 N

    Microsoft Academic Search

    D. G. Myer; S. Constable

    2005-01-01

    In February 2004, we conducted the world's largest academic broadband marine magnetotelluric (MT) experiment at the RIDGE2000 integrated study site (ISS) on the East Pacific Rise (EPR). Forty broadband EM receivers were deployed a total of 72 times to yield 69 sites of data. Twenty instruments were deployed in a small aperture (30 km) transect of densely spaced MT sites

  19. Educational Development in East Timor

    ERIC Educational Resources Information Center

    Millo, Yiftach; Barnett, Jon

    2004-01-01

    This paper examines educational development in East Timor. It is particularly concerned with the period between October 1999 and May 2002 when the country was governed by the United Nations Transitional Administration in East Timor (UNTAET). The paper argues that UNTAET missed an important opportunity to implement the transformation in education…

  20. Technical Report Middle East Technical University

    E-print Network

    Ucoluk, Gokturk

    Technical Report Middle East Technical University Department of Computer Engineering To afford Engineering Middle East Technical University In¨on¨u Bulvari, 06531, Ankara TURKEY c Middle East Technical

  1. Completion Report for Well ER-EC-11 Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2010-12-01

    Well ER-EC-11 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office, in support of the Nevada Environmental Restoration Project at the Nevada National Security Site (formerly Nevada Test Site), Nye County, Nevada. The well was drilled in September and October 2009 as part of the Pahute Mesa Phase II drilling program. A main objective was to investigate radionuclide migration down-gradient from Well Cluster ER-20-5 and Well ER-20-7 and across the northern Timber Mountain moat structural zone into the area referred to as the Bench, between Pahute Mesa and the Timber Mountain caldera complex. A secondary purpose of the well was to provide detailed hydrogeologic information for the shallow- to intermediate-depth Tertiary volcanic section in the Bench area. This well also provided detailed hydrogeologic information in the Tertiary volcanic section to reduce uncertainties within the Pahute Mesa-Oasis Valley hydrostratigraphic framework model (Bechtel Nevada, 2002). The main 52.1-centimeter hole was drilled to a depth of 507.5 meters and then opened to a diameter of 66.0 centimeters. It was cased with 50.8-centimeter casing to 504.9 meters. The hole diameter was then decreased to 47.0 centimeters, and drilling continued to a total depth of 979.3 meters. It was then cased with 34.0-centimeter casing set at 965.5 meters. The hole diameter was then decreased to 31.1 centimeters and the borehole was drilled to a total depth of 1,264.3 meters. The completion casing string, set to the depth of 1,262.5 meters, consists of 19.4-centimeter stainless-steel casing hanging from 19.4-centimeter carbon-steel casing. The stainless-steel casing has two slotted intervals open to the Tiva Canyon and Topopah Spring aquifers. Four piezometer strings were installed in Well ER-EC-11. A string of carbon-steel 6.0-centimeter tubing with one slotted interval was inserted outside the 50.8-centimeter casing, within the 66.0-centimeter borehole for access to the Timber Mountain aquifer, and landed at 475.3 meters. A second string of 6.0-centimeter tubing with one slotted interval was inserted outside the 34.0-centimeter casing, within the 47.0-centimeter borehole for access to the Benham aquifer, and landed at 911.7 meters. A third piezometer string consists of 7.3-centimeter stainless-steel tubing that hangs from 6.0-centimeter carbon-steel tubing via a crossover sub. This string was landed at 1,029.5 meters to monitor the Tiva Canyon aquifer. The deepest string of 7.3-centimeter tubing was landed at 1,247.8 meters to monitor the Topopah Spring aquifer. Data collected during and shortly after hole construction include composite drill cuttings samples collected every 3.0 meters, 67 percussion gun and rotary sidewall core samples, various geophysical logs, fluid samples (for groundwater chemistry analysis and tritium measurements), and water-level measurements. The well penetrated 1,264.3 meters of Tertiary volcanic rock, including three saturated welded-tuff aquifers and one saturated lava-flow aquifer. A water level was measured in the Timber Mountain aquifer at 449.6 meters, during open-hole geophysical logging on September 20, 2009. The fluid level measured after the total depth was reached and the upper aquifer was cased off was 450.0 meters when measured in the open borehole on October 17, 2009. Measurements on samples taken from the undeveloped well indicated that tritium levels averaging approximately 12,430 picocuries per liter (less than Safe Drinking Water Act levels) were encountered within the Benham aquifer. Tritium was below the minimum detectable activity concentration for samples collected from the Tiva Canyon aquifer and the Topopah Spring aquifer.

  2. Low leakage current AlGaN/GaN on Si-based Schottky barrier diode with bonding-pad electrode mesa etching

    NASA Astrophysics Data System (ADS)

    Jang, Hyun-Gyu; Na, Jeho; Kim, Jung-Jin; Park, Young-Rak; Lee, Hyun-Soo; Jung, Dong-Yun; Mun, Jae-Kyoung; Ko, Sang Choon; Nam, Eun Soo

    2015-07-01

    Bonding-pad electrode-area-etched AlGaN/GaN on a Si-based Schottky barrier diode (SBD) is fabricated. Electrode mesa etching leads to reverse bias leakage current about one order of magnitude lower than that of SBD without electrode mesa etching, but forward currents do not vary greatly, compared with that in conventional SBD, which has no electrode mesa etching.

  3. Stratigraphic revision and depositional environments of the Upper Cretaceous Toreva Formation in the northern Black Mesa area, Navajo and Apache counties, Arizona

    SciTech Connect

    Franczyk, K.J.

    1988-01-01

    Two units previously included in the upper part of the Toreva Formation in northern Black Mesa have been assigned new stratigraphic names. One unit previously assigned to the Toreva is reassigned to the Wepo Formation. This report describes the sedimentology of the Toreva Formation and these new units and the depositional history of the Black Mesa area during middle Turonian through early Santonian time. Correlations are made among these units on Black Mesa and Cretaceous sequences in southern Utah and western New Mexico.

  4. Spin polarized tunneling in large area mesas of superconducting Bi2Sr2CaCu2O8+? for the generation of the THz waves

    Microsoft Academic Search

    F. Turkoglu; Y. Simsek; H. Koseoglu; Y. Demirhan; Z. Meric; L. Ozyuzer

    2009-01-01

    Rectangular intrinsic Josephson junction mesa structures of superconducting Bi2Sr2CaCu2O8+? (Bi2212) can be used as a source of continuous, coherent and polarized terahertz (THz) radiation. THz emitting mesas are below a certain underdoped level of Bi2212. They have small Josephson critical current in contrast to optimally doped and overdoped Bi2212. We deposited Au\\/Co\\/Au multilayer top of mesa and obtained small critical

  5. Attributes and characteristics of the Mathematics, Engineering, Science, Achievement (MESA) high school program for first-generation Latino students

    NASA Astrophysics Data System (ADS)

    Flores, Ramon

    This study used a web-based survey collected data from 28 first-generation Latino engineers who participated in the Mathematics, Engineering, Science, Achievement (MESA) program during their high school years. From the set of 28 respondents, 5 volunteered to participate in an optional telephone interview. The purpose of this study was to describe the critical attributes and characteristics of the MESA program that lead to success at both the high school and college levels for first-generation Latino students. Success at the high school level was operationally defined as successfully graduating with a high school diploma. Success at the college level was operationally defined here as college graduation with an engineering degree. Using a mixed-methods technique, the researcher attempted to secure consensus of opinion from a sample population of 28 first-generation Latino engineers. The mixed-methods technique was chosen since it allowed the researcher to draw on the strengths of quantitative and qualitative approaches. According to the findings, the typical respondent felt that mentoring was the attribute of the MESA program that most prepared him to graduate from high school. The respondents felt that the following MESA attributes most helped them transition into an undergraduate engineering program: Academic and University Advising; Enrichment Activities; Career Advising; Field Trips; Mentoring; Scholarship Incentive Awards; and Speakers. The respondents viewed study groups as the MESA attribute that best prepared them to graduate college with an engineering degree. This study was purposefully designed as a descriptive study. Future research is required to extend this work into an evaluative study. This would allow for the generalization of the critical attributes to the general student population serviced by the MESA program.

  6. Geological site characterization for the proposed Mixed Waste Disposal Facility, Los Alamos National Laboratory

    SciTech Connect

    Reneau, S.L.; Raymond, R. Jr. [eds.

    1995-12-01

    This report presents the results of geological site characterization studies conducted from 1992 to 1994 on Pajarito Mesa for a proposed Los Alamos National Laboratory Mixed Waste Disposal Facility (MWDF). The MWDF is being designed to receive mixed waste (waste containing both hazardous and radioactive components) generated during Environmental Restoration Project cleanup activities at Los Alamos. As of 1995, there is no Resource Conservation and Recovery Act (RCRA) permitted disposal site for mixed waste at the Laboratory, and construction of the MWDF would provide an alternative to transport of this material to an off-site location. A 2.5 km long part of Pajarito Mesa was originally considered for the MWDF, extending from an elevation of about 2150 to 2225 m (7060 to 7300 ft) in Technical Areas (TAs) 15, 36, and 67 in the central part of the Laboratory, and planning was later concentrated on the western area in TA-67. The mesa top lies about 60 to 75 m (200 to 250 ft) above the floor of Pajarito Canyon on the north, and about 30 m (100 ft) above the floor of Threemile Canyon on the south. The main aquifer used as a water supply for the Laboratory and for Los Alamos County lies at an estimated depth of about 335 m (1100 ft) below the mesa. The chapters of this report focus on surface and near-surface geological studies that provide a basic framework for siting of the MWDF and for conducting future performance assessments, including fulfillment of specific regulatory requirements. This work includes detailed studies of the stratigraphy, mineralogy, and chemistry of the bedrock at Pajarito Mesa by Broxton and others, studies of the geological structure and of mesa-top soils and surficial deposits by Reneau and others, geologic mapping and studies of fracture characteristics by Vaniman and Chipera, and studies of potential landsliding and rockfall along the mesa-edge by Reneau.

  7. High-Current Multi-Finger Mesa InGaAs/InP DHBTs

    NASA Astrophysics Data System (ADS)

    Jin, Zhi; Cheng, Wei; Su, Yong-Bo; Liu, Xin-Yu; Xu, An-Huai; Qi, Ming

    2009-12-01

    Characteristics of single- and multi-finger mesa InGaAs/InP double heterojunction bipolar transistors (DHBTs) are compared. The current gain decreases with the increasing number nf of the emitter fingers due to the mutual thermal interaction between the fingers. The Kirk current can be as high as 150 mA for four-finger DHBT. No degradation of the peak of the current gain cutoff frequency ft is found for multi-finger DHBTs. The peak of the maximum oscillation frequency fmax decreases with an increase of nf due to the increasing parasitic resistance of the base. The results are very helpful for applications of the common-base DHBTs in power amplifiers operating at very high frequencies.

  8. Software Requirements Specification: Multi-scale Epidemiological and Economic Simulation and Analysis (MESA) Scenario Bank

    SciTech Connect

    Dahlgren, T L; Hazlett, S G; Slone, D M; Smith, S G

    2006-11-08

    This document builds on the discussion notes from September 21, 2006. It provides a summary of the ideas relating to the scenario bank tables and their associated requirements. Two conceptual groupings were identified for the contents requirements of the scenario bank. The first, called ProjectTemplate, shall consist of groups. The second, ProjectArchive, shall consist of groups of . The figure below illustrates the multiplicity of the associations between the different tables, with color coding used to distinguish between current MESA (brown) and USDA (light green) requirements. Scenario bank tables are shown in black with their general contents specified within the box. The metadata associated with each table is expected to include database key information as well as relevant timestamps. Each File is expected to be a file with an arbitrary format.

  9. High-frequency voltage-controlled-oscillator for use with inverted- mesa quartz resonators

    SciTech Connect

    Wessendorf, K.O.

    1996-08-01

    An oscillator circuit has been developed that uses inverted mesa resonators, in a high precision VCO application, at frequencies historically dominated by SAW designs. This design incorporates a frequency tripler that provides a 600 MHz output capability using a 200 MHz 3{sup rd} overtone resonator. This design has advantages over equivalent SAW alternatives: lower power consumption, superior aging characteristics, linear frequency pulling and low frequency versus temperature sensitivity. The VCO presented demonstrates {gt} +/- 60 ppm pullability (0 to 7V control), tuning linearity better than +/- 5% with phase noise at 1 kHz {lt} -110 DBc/Hz. this oscillator- tripler exploits the nonlinear characteristics of an emitter-coupled pair differential amplifier to obtain a high performance oscillator design.

  10. Testing eccentricity pumping mechanisms to model eccentric long-period sdB binaries with MESA

    NASA Astrophysics Data System (ADS)

    Vos, J.; Østensen, R. H.; Marchant, P.; Van Winckel, H.

    2015-07-01

    Context. Hot subdwarf-B stars in long-period binaries are found to be on eccentric orbits, even though current binary-evolution theory predicts these objects to be circularised before the onset of Roche-lobe overflow (RLOF). Aims: We aim to find binary-evolution mechanisms that can explain these eccentric long-period orbits, and reproduce the currently observed period-eccentricity diagram. Methods: Three different processes are considered; tidally-enhanced wind mass-loss, phase-dependent RLOF on eccentric orbits and the interaction between a circumbinary disk and the binary. The binary module of the stellar-evolution code Modules for Experiments in Stellar Astrophysics (MESA) is extended to include the eccentricity-pumping processes. The effects of different input parameters on the final period and eccentricity of a binary-evolution model are tested with MESA. Results: The end products of models with only tidally-enhanced wind mass-loss can indeed be eccentric, but these models need to lose too much mass, and invariably end up with a helium white dwarf that is too light to ignite helium. Within the tested parameter space, no sdBs in eccentric systems are formed. Phase-dependent RLOF can reintroduce eccentricity during RLOF, and could help to populate the short-period part of the period-eccentricity diagram. When phase-dependent RLOF is combined with eccentricity pumping via a circumbinary disk, the higher eccentricities can be reached as well. A remaining problem is that these models favour a distribution of higher eccentricities at lower periods, while the observed systems show the opposite. Conclusions: The models presented here are potentially capable of explaining the period-eccentricity distribution of long-period sdB binaries, but further theoretical work on the physical mechanisms is necessary. Appendix A is available in electronic form at http://www.aanda.org

  11. 1. GENERAL VIEW OF OBSERVATION BUNKERS TO THE EAST OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. GENERAL VIEW OF OBSERVATION BUNKERS TO THE EAST OF TEST STAND 1-A: IN FOREGROUND, BUILDING 8769, A TWO WINDOW DESIGN (NOT ON SITE PLAN); IN THE MIDDLE DISTANCE, BUILDING 8768, A ONE WINDOW DESIGN "OBSERVATION AND CAMERA BUILDING NO. 2" ON SITE PLAN; IN THE DISTANCE, AT FAR LEFT, BUILDING 8767, A FOUR WINDOW DESIGN "MASTER OBSERVATION AND CAMERA BUILDING NO. 1" ON SITE PLAN. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Observation Bunkers for Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

  12. How the East Was Lost

    ERIC Educational Resources Information Center

    Downs, Ernest C.

    1975-01-01

    Today there are over 250,000 Native Americans living east of the Mississippi River, most of whom are not recognized by the Federal government. The article discusses what happened to these people and their lands. (NQ)

  13. East Asian Security in 2025

    E-print Network

    Heavin, Reagan; Hudson, Adam; Krueger, Brandon; O'Neil, Sean; Rozell, Griffin; Suma, Matt

    2008-01-01

    -American Competition Outcome 2: Multilateral Cooperation Outcome 3: Multipolar Competition Outcome 4: China Plateaus Economic Growth Chinese Foreign Policy US Reaction Asian Security in 2025 Outcome 1: Sino-American Competition Source: http://aftermathnews.files.wordpress.com... World Energy Outlook 2004 China’s Oil Balance East Asian Security in 2025 Positive Demographic Trends • Increasingly educated population • Stable labor force until 2020 Number of Bachelors Degrees Awarded in China v. US Source: Holz, 2006, 44. East...

  14. Siting study for a consolidated waste capability at Los Alamos National Laboratory

    SciTech Connect

    Booth, Steven Richard [Los Alamos National Laboratory

    2010-11-05

    Decision analysis was used to rank alternative sites for a potential Consolidated Waste Capability (CWC) to replace current hazardous solid waste operations (hazardous/chemical, mixed low-level, transuranic, and low-level waste) at Los Alamos National Laboratory's Technical Area (TA)-54. An original list of 21 site alternatives was pre-screened to seven sites that were assessed using the analytical hierarchy process with five top-level criteria and fifteen sub-criteria. The top site choice is TA-63/52/46; the second choice is TA-18/36. The seven sites are as follows. TA-18/36 (62 acres) is located on Potrillo Drive that intersects Pajarito Road at the bottom of a steep grade. It has some blast zone issues on its southwest side and some important archeological sites on the southeast section. TA-60 (50 acres) is located at the end of Eniwetok Road off Diamond Drive, east of TA-3. Most of the site is within a fifty foot-deep ravine (that may have contamination in the drainage), with a small section on the mesa above. TA-63/52/46 (110 acres) lies to the north of Pajarito Road along Puye Road. It is centrally located in a brown field industrial area, with good access to generators on a controlled road. TA-46 (22 acres) is a narrow site on the south side of Pajarito Road across from TA-46 office buildings. TA-48 (14 acres) is also narrow, and is located on the north side of Pajarito Road near the west vehicle access portal (VAP). TA-51 (19 acres) is located on the south side of Pajarito Road at the top of the hill above TA-18 near the current entrance to the TA-54. TA-54 West (16 acres) is just north of the entrance to TA-54 at Pajarito Road and is close to Zone 4. Although it is near the San Ildefonso Pueblo property line, there may be adequate set-back for sight screening.

  15. ECR-Etching of Submicron and Nanometer Sized 3C-SiC(100) Mesa Lars Hiller1,a

    E-print Network

    As, Donat Josef

    ECR-Etching of Submicron and Nanometer Sized 3C-SiC(100) Mesa Structures Lars Hiller1,a , Thomas cyclotron resonance etching, electron beam lithography, 3C-SiC Abstract Anisotropic etching processes) plasma etcher were studied on Novasic substrates with 10 µm thick 3C-SiC(100) grown on Si(100

  16. The effect of dissolution of volcanic glass on the water chemistry in a tuffaceous aquifer, Rainier Mesa, Nevada

    USGS Publications Warehouse

    White, Art F.; Claassen, H.C.; Benson, Larry V.

    1980-01-01

    Geochemistry of ground water associated with the Tertiary tuffs within Rainier Mesa, southern Nevada, was investigated to determine the relative importance of glass dissolution in controlling water chemistry. Water samples were obtained both from interstitial pores in core sections and from free-flowing fractures. Cation com- positions showed that calcium and magnesium decreased as a function of depth in the mesa, as sodium increased. The maximum effect occurs within alteration zones containing clinoptilolite and montmorillonite, suggesting these minerals effectively remove bivalent cations from the system. Comparisons are made between compositions of ground waters found within Rainier Mesa that apparently have not reacted with secondary minerals and compositions of waters produced by experimental dissolution of vitric and crystalline tufts which comprise the principal aquifers in the area. The two tuff phases have the same bulk chemistry but produce aqueous solutions of different chemistry. Rapid parabolic dissolution of sodium and silica from, and the retention of, potassium within the vitric phase verify previous predictions concerning water compositions associated with vitric volcanic rocks. Parabolic dissolution of the crystalline phase results in solutions high in calcium and magnesium and low in silica. Extrapolation of the parabolic dissolution mechanism for the vitric tuff to long times successfully reproduces, at com- parable pH, cation ratios existing in Rainier Mesa ground water. Comparison of mass- transfer rates of the vitric and crystalline tuffs indicates that the apparent higher glass-surface to aqueous-volume ratio associated with the vitric rocks may account for dominance of the glass reaction.

  17. Predicting and mitigating weed invasions to restore natural post-fire succession in Mesa Verde National Park, Colorado, USA

    Microsoft Academic Search

    M. Lisa FloydA; David HannaA; William H. RommeB; Timothy E. CrewsA

    2006-01-01

    Six large wildfires have burned in Mesa Verde National Park during the last 15 years, and extensive portions of burns were invaded by non-native plant species. The most threatening weed species include Carduus nutans, Cirsium arvense, and Bromus tectorum, and if untreated, they persist at least 13 years. We investigated patterns of weed distribution to identify plant communities most vulnerable

  18. Common Base Amplifier with 7-dB gain at 176 GHz in InP mesa DHBT Technology

    E-print Network

    Rodwell, Mark J. W.

    The Common base topology is chosen as it has higher MSG in this band when compared to common emitterCommon Base Amplifier with 7- dB gain at 176 GHz in InP mesa DHBT Technology V. Paidi, Z. Griffith, Pasadena, CA 91109, USA Abstract -- We report common base power amplifiers designed for 140-220-GHz

  19. Las mesas de trabajo ambiental como estrategia de autoformaciòn y fortalecimiento del liderazgo docente: una experiencia de cooperaciòn

    Microsoft Academic Search

    Alfredo Antonio pupo Gomez; Marìa Teresa Holguìn Aguirre

    2010-01-01

    RESUMEN Para el desarrollo de los Proyectos Ambientales Escolares en la Localidad de Suba, se implementó como estrategia de trabajo participativo la Mesa Educación Ambiental Local - MEAL, en donde participan las instituciones educativas de la Localidad de Suba Bogotá D.C., bajo la orientación del Centro Administrativo de Educación Local - CADEL 11 y la Universidad Libre, en el marco

  20. Comments on Anthony Bruton, Miguel Garcia Lopez, and Raquel Esquiliche Mesa's "Incidental L2 Vocabulary Learning: An Impracticable Term?"

    ERIC Educational Resources Information Center

    Reynolds, Barry Lee

    2012-01-01

    Anthony Bruton, Miguel Garcia Lopez, and Raquel Esquiliche Mesa's "Incidental L2 Vocabulary Learning: An Impracticable Term?" (2011) offers some constructive criticism regarding the conventional terminology used in second language (L2) acquisition research and language pedagogy. Although the author finds much of their evidence reasonable and is…

  1. Common base amplifier with 7 - dB gain at 176 GHz in InP mesa DHBT technology

    NASA Technical Reports Server (NTRS)

    Samoska, Lorene; Paidi, V.; Griffith, Z.; Dahlstrom, M.; Wei, Y.; Urteaga, M.; Rodell, M. J. W.; Fung, A.

    2004-01-01

    We report a single stage tunded amplifier that exhibits 7 dB small signal gain at 176 GHz. Common Base topology is chosen as it has the best maximum stable gain (MSG) in this frequency band when compared to common emitter and common collector topologies. The amplifiers are designed and fabricated in InP mesa double heterojunction bipolar transistor (DHBT) technology.

  2. New material of Dinochelys whitei Gaffney, 1979, from the Dry Mesa Quarry (Morrison Formation, Jurassic) of Colorado

    Microsoft Academic Search

    Donald B. Brinkman; Ken Stadtman; David Smith

    2000-01-01

    A specimen of a juvenile individual of Dinochelys from the Dry Mesa Quarry, Morrison Formation, provides the first record of the skull and neck in this genus. Dinochelys is interpreted as related to Glyptops on the basis of a similar development of sculpture on the vertebral scutes of juvenile individuals, and a similar development of a beak on the premaxilla

  3. Mesa County Public Library District, Final Performance Report for Library Services and Construction Act (LSCA) Title VI, Library Literacy Program.

    ERIC Educational Resources Information Center

    LaDuke, Caryl

    The Adult Reading Program, a project of the Mesa County Public Library District (Grand Junction, Colorado), involved recruitment, retention, coalition building, public awareness, training, rural oriented, basic literacy, collection development, tutoring, employment oriented, intergenerational/family, and English as a Second Language (ESL)…

  4. Earthquake Model of the Middle East (EMME) Project: Active Fault Database for the Middle East Region

    NASA Astrophysics Data System (ADS)

    Gülen, L.; Wp2 Team

    2010-12-01

    The Earthquake Model of the Middle East (EMME) Project is a regional project of the umbrella GEM (Global Earthquake Model) project (http://www.emme-gem.org/). EMME project region includes Turkey, Georgia, Armenia, Azerbaijan, Syria, Lebanon, Jordan, Iran, Pakistan, and Afghanistan. Both EMME and SHARE projects overlap and Turkey becomes a bridge connecting the two projects. The Middle East region is tectonically and seismically very active part of the Alpine-Himalayan orogenic belt. Many major earthquakes have occurred in this region over the years causing casualties in the millions. The EMME project will use PSHA approach and the existing source models will be revised or modified by the incorporation of newly acquired data. More importantly the most distinguishing aspect of the EMME project from the previous ones will be its dynamic character. This very important characteristic is accomplished by the design of a flexible and scalable database that will permit continuous update, refinement, and analysis. A digital active fault map of the Middle East region is under construction in ArcGIS format. We are developing a database of fault parameters for active faults that are capable of generating earthquakes above a threshold magnitude of Mw?5.5. Similar to the WGCEP-2007 and UCERF-2 projects, the EMME project database includes information on the geometry and rates of movement of faults in a “Fault Section Database”. The “Fault Section” concept has a physical significance, in that if one or more fault parameters change, a new fault section is defined along a fault zone. So far over 3,000 Fault Sections have been defined and parameterized for the Middle East region. A separate “Paleo-Sites Database” includes information on the timing and amounts of fault displacement for major fault zones. A digital reference library that includes the pdf files of the relevant papers, reports is also being prepared. Another task of the WP-2 of the EMME project is to prepare a strain and slip rate map of the Middle East region by basically compiling already published data. The third task is to calculate b-values, Mmax and determine the activity rates. New data and evidences will be interpreted to revise or modify the existing source models. A logic tree approach will be utilized for the areas where there is no consensus to encompass different interpretations. Finally seismic source zones in the Middle East region will be delineated using all available data. EMME Project WP2 Team: Levent Gülen, Murat Utkucu, M. Dinçer Köksal, Hilal Domaç, Yigit Ince, Mine Demircioglu, Shota Adamia, Nino Sandradze, Aleksandre Gvencadze, Arkadi Karakhanyan, Mher Avanesyan, Tahir Mammadli, Gurban Yetirmishli, Arif Axundov, Khaled Hessami, M. Asif Khan, M. Sayab.

  5. Well Completion Report for Well ER-20-11, Corrective Action Units 101 and 102: Central and Western Pahute Mesa

    SciTech Connect

    NSTec Environmental Management

    2013-02-27

    Well ER-20-11 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of the Nevada Environmental Management Operations Underground Test Area (UGTA) Activity at the Nevada National Security Site (formerly Nevada Test Site), Nye County, Nevada. The well was drilled in September 2012 as part of the Central and Western Pahute Mesa Corrective Action Unit Phase II drilling program. Well ER-20-11 was constructed to further investigate the nature and extent of radionuclidecontaminated groundwater encountered in two nearby UGTA wells, to help define hydraulic and transport parameters for the contaminated Benham aquifer, and to provide data for the UGTA hydrostratigraphic framework model. The 44.5-centimeter (cm) surface hole was drilled to a depth of 520.0 meters (m) and cased with 34.0-cm casing to 511.5 m. The hole diameter was then decreased to 31.1 cm, and the borehole was drilled to a total depth of 915.6 m. The hole was completed to allow access for hydrologic testing and sampling in the target aquifer, which is a lava-flow aquifer known as the Benham aquifer. The completion casing string, set to the depth of 904.3 m, consists of a string of 6?-inch (in.) stainless-steel casing hanging from a string of 7?-in. carbon-steel casing. The stainless-steel casing has one slotted interval at 796.3 to 903.6 m. One piezometer string was installed, which consists of 2?-in. stainless-steel tubing that hangs from 2?-in. carbon-steel tubing via a crossover sub. This string was landed at 903.8 m and is slotted in the interval 795.3 to 903.1 m. Data collected during and shortly after hole construction include composite drill cuttings samples collected every 3.0 m, various geophysical logs, fluid samples (for groundwater chemistry analysis and tritium measurements), and water-level measurements. The well penetrated 915.6 m of Tertiary volcanic rock, including one saturated lava flow aquifer. Measurements on samples taken from the undeveloped well indicated elevated tritium levels within the Benham aquifer. The maximum tritium level measured with field equipment was 146,131 picocuries per liter from a sample obtained at the depth of 912.0 m. The fluid level was measured in the piezometer string at a depth of 504.5 m on September 26, 2012. All Fluid Management Plan (FMP) requirements for Well ER-20-11 were met. Analysis of monitoring samples and FMP confirmatory samples indicated that fluids generated during drilling at Well ER-20-11 met the FMP criteria for discharge to an unlined sump or designated infiltration area. Well development, hydrologic testing, and sampling will be conducted at a later date.

  6. The epidemiology and survival of extrapulmonary small cell carcinoma in South East England, 1970–2004

    Microsoft Academic Search

    Yien Ning S Wong; Ruth H Jack; Vivian Mak; Møller Henrik; Elizabeth A Davies

    2009-01-01

    BACKGROUND: Extrapulmonary small cell carcinoma (EPSCC) is a rare cancer and few studies describe its epidemiology. Our objectives were to compare the incidence and survival of EPSCC in South East England with small cell carcinoma of the lung (SCLC), to determine the most common anatomical presenting sites for EPSCC and to compare survival in EPSCC by disease stage and site

  7. Viruses and Bacteria in Karst and Fractured Rock Aquifers in East Tennessee, USA

    EPA Science Inventory

    A survey of enteric viruses and indicator bacteria was carried out in eight community water supply sources (four wells and four springs) in east Tennessee. Seven of the sites were in carbonate aquifers and the other was in fractured sandstone. Four sites (three wells and one sp...

  8. MESA MODELS OF CLASSICAL NOVA OUTBURSTS: THE MULTICYCLE EVOLUTION AND EFFECTS OF CONVECTIVE BOUNDARY MIXING

    SciTech Connect

    Denissenkov, Pavel A.; Herwig, Falk [Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada)] [Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada); Bildsten, Lars; Paxton, Bill, E-mail: pavelden@uvic.ca, E-mail: fherwig@uvic.ca, E-mail: bildsten@kitp.ucsb.edu, E-mail: paxton@kitp.ucsb.edu [Kavli Institute for Theoretical Physics and Department of Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States)] [Kavli Institute for Theoretical Physics and Department of Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States)

    2013-01-01

    Novae are cataclysmic variables driven by accretion of H-rich material onto a white dwarf (WD) star from its low-mass main-sequence binary companion. New time-domain observational capabilities, such as the Palomar Transient Factory and Pan-STARRS, have revealed a diversity of their behavior that should be theoretically addressed. Nova outbursts depend sensitively on nuclear physics data, and more readily available nova simulations are needed in order to effectively prioritize experimental effort in nuclear astrophysics. In this paper, we use the MESA stellar evolution code to construct multicycle nova evolution sequences with CO WD cores. We explore a range of WD masses and accretion rates as well as the effect of different cooling times before the onset of accretion. In addition, we study the dependence on the elemental abundance distribution of accreted material and convective boundary mixing at the core-envelope interface. Models with such convective boundary mixing display an enrichment of the accreted envelope with C and O from the underlying WD that is commensurate with observations. We compare our results with the previous work and investigate a new scenario for novae with the {sup 3}He-triggered convection.

  9. Modelling the evolution of solar-mass stars with a range of metallicities using MESA

    NASA Astrophysics Data System (ADS)

    Jones, E. F.; Gore, P. M.

    2015-05-01

    The nuclides 1,2H, 3,4He, 7Li, 7Be, 8B, 12,13C, 13-15N, 14-18O, 17-19F, 18-22Ne, 22Mg, and 24Mg were used in the code package MESA (Modules for Experiments in Stellar Astrophysics)[Paxton] to model a one-solar-mass star with a range of metallicities, z, from 0 to 0.1. On HR diagrams of each star model's luminosity and effective temperature from before zero-age main sequence (pre-ZAMS) to white dwarf, oscillations were noted in the horizontal branch at intervals from z = 0 to 0.0070. At z, = 0, the calculated stellar lifetime is 6.09x109 years. The calculated lifetime of the model stars increases to a maximum of 1.25x1010 years at z = 0.022 and then decreases to 2.59x109 years at z = 0.1. A piecewise fit of the model lifetimes vs. metallicity was obtained.

  10. Seismic Imaging in Three Dimensions on the East Pacific Rise

    Microsoft Academic Search

    John C. Mutter; Suzanne Carbotte; Mladen Nedimovic; Juan Pablo Canales; Hélène Carton

    2009-01-01

    The U.S. R\\/V Marcus G. Langseth (operated by the Lamont-Doherty Earth Observatory of Columbia University) sailed in late June 2008 from Manzanillo, Mexico, to the 9°50'N area of the East Pacific Rise (EPR), a site of vigorous hydrothermal venting (Figure 1). The cruise, MGL0812, the first research deployment of the Langseth's advanced three-dimensional (3-D) seismic imaging capability, had as its

  11. Concentrations of rare earth elements in topsoil from East China

    Microsoft Academic Search

    Tian Yang; Zhaoyu Zhu; Yi Wu; Zhiguo Rao

    2008-01-01

    Fifty topsoil samples collected from 12 different regions of East China have been analyzed for rare earth elements (REEs).\\u000a The average REE concentrations of the 50 topsoil samples are much higher than world average and are characterized by LREE-enrichment,\\u000a HREE-depletion, Eu-depletion and Ce-enrichment. However, the REE concentration is not strongly affected by the climate of\\u000a the sampling site; it is

  12. The atmospheric deposition of phosphorus in Lake Victoria (East Africa)

    Microsoft Academic Search

    Rashid A. Tamatamah; Robert E. Hecky; Hamish C. Duthie

    2005-01-01

    Wet and dry atmospheric fluxes of total phosphorus (TP) and soluble reactive phosphorus (SRP) measured at four sites over a 12-month period were used to estimate lake-wide atmospheric phosphorus (P) deposition to Lake Victoria, East Africa. Atmospheric samples were collected in plastic buckets with top diameter of 25.5 cm by 30 cm deep. The highest P loading rates of 2.7 (TP) and

  13. VIEW OF BUILDING 111 LOOKING EAST, NORTHEAST. BUILDING 111, BUILT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF BUILDING 111 LOOKING EAST, NORTHEAST. BUILDING 111, BUILT IN 1953, WAS ONE OF THE FIRST TEN PERMANENT STRUCTURES ON THE ROCKY FLATS PLANT. THE BUILDING SERVED AS AN ENTRY POINT FOR SITE EMPLOYEES AND HOUSED A PRINT SHOP AND PHOTOGRAPHY LAB. (12/26/52) - Rocky Flats Plant, Offices, Print Shop & Photography Lab, Northwest quad of plant near terminus of Central Avenue, Golden, Jefferson County, CO

  14. 22. First floor, staircase, looking east Veterans Administration Center, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. First floor, staircase, looking east - Veterans Administration Center, Officers Duplex Quarters, 5302 East Kellogg (Legal Address); 5500 East Kellogg (Common Address), Wichita, Sedgwick County, KS

  15. Economic Outlook for East Asia

    NSDL National Science Digital Library

    1998-01-01

    An Institute for Developing Economies (IDE) publication, the 1999 Economic Outlook for East Asia analyzes the East Asian countries in 1998 and presents forecasts for 1999 (in English and Japanese). According to IDE, Thailand and South Korea will begin to see signs of recovery in the coming year, as the impact of the new Miyazawa Initiative is felt, although Hong Kong will remain "afflicted" by recession. Malaysia and Singapore are also expected to recover as will the Philippines, Vietnam, and Taiwan. As a whole, the growth rate for the East Asian economies is predicted to rise to 3.1 percent in 1999 from 0.1 percent, and general prices are forecast to "swing back" to a single-digit inflation rate of 6.6 percent.

  16. Tectonics of East Indonesia

    NASA Astrophysics Data System (ADS)

    Nishimura, Susumu; Suparka, S.

    1990-09-01

    The complex processes resulting in basin formation and inversion during the Tertiary tectonic evolution of Indonesia owe their origin to the interplay between the Indian, Eurasian, Australian and Pacific plates. Within the framework of these major plates and their relative motions, some microplates may be recognized whose tectonic development was constrained by motions of the large plates. Treated as small ridged microplates, their boundaries define the sites of basin formation. Their dynamic development results in the formation and subsequent inversion of basins throughout the region. This paper outlines the tectonic framework of Indonesia throughout Tertiary time in a series of reconstructions and considers the constraints that this implies for microplate motions and basin histories.

  17. 6. Photographic copy of aerial photo of site c. 1965. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photographic copy of aerial photo of site c. 1965. Original photo on file at (PAO), NUWC, Newport, R.I. Copyright-free. - Naval Undersea Warfare Center, East side of Smith & East Streets between Columbia & South Coves, New London, New London County, CT

  18. 5. Photographic copy of aerial photo of site c. 1945. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Photographic copy of aerial photo of site c. 1945. Original photo on file at Public Affairs Office (PAO), Naval Undersea Warfare Center (NUWC), Newport, R.I. Copyright-free. - Naval Undersea Warfare Center, East side of Smith & East Streets between Columbia & South Coves, New London, New London County, CT

  19. Comparisons among the five ground-motion models developed using RESORCE for the1 prediction of response spectral accelerations due to earthquakes in Europe and the Middle East2

    E-print Network

    Paris-Sud XI, Université de

    of response spectral accelerations due to earthquakes in Europe and the Middle East2 John Douglas1 , Sinan faulting; site amplification; aleatory variability; epistemic uncertainty; Europe; Middle East.23 1 BRGM, Orléans, France 2 Middle East Technical University, Ankara, Turkey 3 FUGRO-Geoter, Auriol, France. 4

  20. Seasonal variation of 228 Ra\\/ 226 Ra ratio in surface water from the East China Sea and the Tsushima Strait

    Microsoft Academic Search

    Mutsuo Inoue; Yusuke Nakano; Yoko Kiyomoto; Hisaki Kofuji; Yasunori Hamajima; Masayoshi Yamamoto

    2010-01-01

    A total of 21 surface water samples were collected on the east side of the East China Sea (ECS) (3 sites) and at the Tsushima\\u000a Strait (1 site), and 226Ra and 228Ra activities were measured using low-background ?-spectrometry. The 228Ra\\/226Ra ratios among the samples exhibited notable seasonal variation (228Ra\\/226Ra = 0.2–2.6) accompanying changes of salinity (31.7–34.7). Seasonal water circulation within

  1. Archaeological studies at Drill Hole U20az Pahute Mesa, Nye county, Nevada. [Contains bibliography

    SciTech Connect

    Simmons, A.H.; Hemphill, M.L.; Henton, G.H.; Lockett, C.L.; Nials, F.L.; Pippin, L.C.; Walsh, L.

    1991-07-01

    During the summer of 1987, the Quaternary Sciences Center (formerly Social Science Center) of the Desert Research Institute (DRI), University of Nevada System, conducted data recovery investigations at five archaeological sites located near Drill Hole U20az on the Nevada Test Site in southern Nevada. These sites were among 12 recorded earlier during an archaeological survey of the drill hole conducted as part of the environmental compliance activities of the Department of Energy (DOE). The five sites discussed in this report were considered eligible for the National Register of Historic Places and were in danger of being adversely impacted by construction activities or by effects of the proposed underground nuclear test. Avoidance of these sites was not a feasible alternative; thus DRI undertook a data recovery program to mitigate expected adverse impacts. DRI's research plan included controlled surface collections and excavation of the five sites in question, and had the concurrence of the Nevada Division of Historic Preservation and Archaeology and the Advisory Council of Historic Preservation. Of the five sites investigated, the largest and most complex, 26Ny5207, consists of at least three discrete artifact concentrations. Sites 26Ny5211 and 26Ny5215, both yielded considerable assemblages. Site 26Ny5206 is very small and probably is linked to 26Ny5207. Site 26Ny5205 contained a limited artifact assemblage. All of the sites were open-air occurrences, and, with one exception contained no or limited subsurface cultural deposits. Only two radiocarbon dates were obtained, both from 26Ny5207 and both relatively recent. While the investigations reported in the volume mitigate most of the adverse impacts from DOE activities at Drill Hole U20az, significant archaeological sites may still exist in the general vicinity. Should the DOE conduct further activities in the region, additional cultural resource investigations may be required. 132 refs., 71 figs., 44 tabs.

  2. The Dynamics of the East Australian Current System: The Tasman Front, the East Auckland Current, and the East Cape Current

    Microsoft Academic Search

    CHARLES E. TILBURO; HARLEY E. HURLBURT; JAMES J. O'BRIEN; JAY E SHRIVER

    The dynamics of the flow field surrounding New Zealand are investigated using a series of global ocean models. The physical mechanisms governing the direction, magnitude, and location of the East Australian Current (EAC), the Tasman Front, the East Auckland Current (EAUC), and the East Cape Current (ECC) are studied using numerical simulations whose complexity is systematically increased. As new dynamics

  3. The Dynamics of the East Australian Current System: The Tasman Front, the East Auckland Current, and the East Cape Current

    Microsoft Academic Search

    Charles E. Tilburg; Harley E. Hurlburt; Jay F. Shriver

    2001-01-01

    The dynamics of the flow field surrounding New Zealand are investigated using a series of global ocean models. The physical mechanisms governing the direction, magnitude, and location of the East Australian Current (EAC), the Tasman Front, the East Auckland Current (EAUC), and the East Cape Current (ECC) are studied using numerical simulations whose complexity is systematically increased. As new dynamics

  4. Applications of Geophysical and Geological Techniques to Identify Areas for Detailed Exploration in Black Mesa Basin, Arizona

    SciTech Connect

    George, S.; Reeves, T.K.; Sharma, Bijon; Szpakiewicz, M.

    1999-04-29

    A recent report submitted to the U.S. Department of Energy (DOE) (NIPER/BDM-0226) discussed in considerable detail, the geology, structure, tectonics, and history of oil production activities in the Black Mesa basin in Arizona. As part of the final phase of wrapping up research in the Black Mesa basin, the results of a few additional geophysical studies conducted on structure, stratigraphy, petrophysical analysis, and oil and gas occurrences in the basin are presented here. A second objective of this study is to determine the effectiveness of relatively inexpensive, noninvasive techniques like gravity or magnetic in obtaining information on structure and tectonics in sufficient detail for hydrocarbon exploration, particularly by using the higher resolution satellite data now becoming available to the industry.

  5. Surface Characterization of 3C-SiC Mesa Heterofilms: Evidence for Growth by Edge/Corner Nucleation Mechanism

    NASA Technical Reports Server (NTRS)

    Trunek, Andrew J.; Neudeck, Philip G.; Spry, David J.; Powell, J. Anothny

    2003-01-01

    This paper presents the first detailed observations of unique surface morphologies of 3C-Sic films grown on 4W6H-SIC mesas by the step-free surface heteroepitaxy technique. The top surfaces of 3C-Sic films were extensively studied by optical microscopy and atomic force microscopy (AFM) as both film thickness (i.e,, growth time) and growth temperature (i.e., terrace nucleation rate) were varied following complete coverage of each 4W6H mesa by an initial 3C-Sic film. Almost all surface steps observed by AFM were 0.25 nm, the height of a single Si-C bilayer. However, strikingly different step patterns were observed, suggesting that radically different processes dominate the nucleation of new 3C-Sic bilayers on top of existing 3C-Sic film surfaces.

  6. Petroleum geology of east Siberia

    SciTech Connect

    Clarke, J.W. (Geological Survey, Reston, VA (United States))

    1991-03-01

    Two oil-gas provinces are present in East Siberia: the Lena-Tunguska in the central, southern, and western parts, and the Khatanga-Viluy along the northern and eastern margins. The provinces developed as rift-sag features in late Proterozoic and Paleozoic time. The identified oil and gas deposits of the Lena-Tunguska province appear to be associated with a Proterozoic rift that extends east-northeast across the southern part of the basin. These deposits are in upper Proterozoic and Cambrian sandstones and carbonate rocks, sealed by Cambrian salt and argillites. The oil and gas deposits of the Khatanga-Vilyuy province are within foreland downwarps that developed in connection with docking of crustal plates during the Mesozoic: during the Triassic on the north and during the Cretaceous on the east. The source of the petroleum in the immature rocks of the southeastern Lena-Tunguska province is uncertain, perhaps being derived from rocks in a downwarp to the south or from source beds that are now beneath a conjectured thrust sheet. This province has both oil and gas pools, but is gas prone in general. The source beds for the Khatanga-Vilyuy province are Permian and Mesozoic in age; the province is gas prone. More than 40 oil and gas fields have now been discovered in East Siberia.

  7. Heart Failure in East Asia

    PubMed Central

    Guo, Yutao; Lip, Gregory YH; Banerjee, Amitava

    2013-01-01

    Heart failure (HF) carries a major burden of disease in East Asia, with high associated risk of mortality and morbidity. In recent decades, the epidemiology of HF has changed with social and economical development in East Asia. The burden of HF is still severe in East Asia. The prevalence of HF ranges from 1.3% to 6.7% throughout the region. As aetiological factors, ischaemic heart disease has increased and valvular disease reduced in most East Asian countries. Diuretics are the most commonly used drugs (51.0%-97%), followed by renin-angiotensin system (RAS) inhibitors (59%-77%), with angiotensin-converting enzyme inhibitors, ACEI, (32%-52%) and has angiotensin-2 receptor blockers, ARBs (31%-44%) in similar proportions. ?-blocker use has also increased in recent years. Total mortality from HF ranges from 2% to 9% in China, Taiwan, Singapore, Thailand, and Japan. Age>65 years, diabetes mellitus, anaemia, renal dysfunction and atrial fibrillation (AF) are associated with adverse outcome. More prospective, region-specific data are still required, particularly regarding new drug therapies such as eplerenone and ivabradine. PMID:23597295

  8. AED in the Middle East

    ERIC Educational Resources Information Center

    Academy for Educational Development, 2004

    2004-01-01

    Founded in 1961, the Academy for Educational Development (AED) is an independent, nonprofit, charitable organization that operates development programs in the United States and throughout the world. This directory presents an overview of the varied activities undertaken by AED throughout the Middle East. Current AED Programs include: (1) Behavior…

  9. Palaeoclimate: East Antarctica's Achilles' heel

    NASA Astrophysics Data System (ADS)

    Hillenbrand, Claus-Dieter

    2013-09-01

    The East Antarctic ice sheet is believed to be Earth's most stable ice sheet. Changes in geochemical composition of offshore sediments suggest that its margin repeatedly retreated by at least 350-550 kilometres inland between 5.3 and 3.3 million years ago.

  10. The East African Rift System

    Microsoft Academic Search

    R. B. McConnell

    1967-01-01

    Dr McConnell joined the Geological Survey of Tanganyika in 1939 and worked there and in other parts of the African continent during the following eighteen years. He reviews here geological aspects of the East African rift structure which have a bearing on problems of the upper mantle and continental drift.

  11. Great Explorers to the East.

    ERIC Educational Resources Information Center

    Baker, Rosalie F., Ed.; Baker, Charles F. III, Ed.

    1990-01-01

    This issue of "Calliope," a world history magazine for young people is devoted to "Great Explorers of the East" and features articles on famous explorers of the eastern hemisphere. The following articles are included: "Ancient Egyptian Mariners"; "Alexander: The Great Reconciler"; "Marco Polo: Describing the World"; "By Water to India";…

  12. Forward-bias degradation in 4H-SiC p+nn+ diodes: Influence of the mesa etching

    Microsoft Academic Search

    N. Camara; A. Thuaire; E. Bano; K. Zekentes

    2005-01-01

    We have investigated the appearance of defects in silicon carbide p+nn+ 4H-SiC diodes by observing the forward-bias-induced light emission through the substrate. The spatial intensity distribution, the temporal evolution and the spectral content of the electroluminescence (EL) signal have been measured in order to detect, identify and understand the defect formation during forward-bias application. It was found that mesa etching

  13. ASME/IEEE MESA 2011 The 7th International ASME/IEEE Conference on Mechatronics & Embedded Systems & Applications

    E-print Network

    Cheng, Harry H.

    ASME/IEEE MESA 2011 The 7th International ASME/IEEE Conference on Mechatronics & Embedded Systems-1Mechatronics& EmbeddedSystemsAppli- cations 10:40AM-12:00PMMESA-5-1KeynotesI 12:00PM-01:40PMAwards-6-1Mechatronic Control&ElectricalVehic- ularSystems 03:40PM-05:20PMMESA-1-3FractionalOrder Controls

  14. Reliability testing of InGaAs mesa stucture waveguide photodiodes for 40Gb\\/s optical receiver applications

    Microsoft Academic Search

    Han Sung Joo; Su Chang Jeon; Bongyong Lee; Yong Hwan Kwon; Joong-Seon Choe; Ilgu Yun

    2004-01-01

    As a summary, the reliability testing of mesa InGaAs WGPDs from the viewpoint of evaluation long-term reliability has been investigated using the accelerated life tests. From the reliability testing results, it was found that the WGPD structure yielded devices that exhibited the median lifetime of much longer than 106 h at practical use conditions. Consequently, this WGPD structure has sufficient

  15. Ultrafast mass transport during decay of gigantic Pb mesas on Ni(111)

    NASA Astrophysics Data System (ADS)

    Poelsema, Bene

    2012-02-01

    We have studied the initial growth of Pb films on Ni(111) at elevated temperatures of 424 K and 474 K. Quantum Well States (QWS's) have been found to be responsible for the morphology of these Pb films on Ni(111). The delicate balance between surface energies, elastic energies and QWS's is initially tilted towards QWS's, as discrete layer heights are observed. First, a strong preference for 5 and 7 layers high, flat topped Pb islands is observed, showing several striking similarities with Pb films on Si(111) and on Cu(111). Key examples of these will be discussed. When the character of the rough film gradually changes from 2D to 3D, the balance between these forces becomes more and more dominated by interfacial energies. A tipping point is reached by very slowly heating the surface to about 520 K. As the energetic balance is tipped for good in favor of the interface free energy, the electronically stabilized, extended, about 40 layers high mesas suddenly decay towards compact hemispheric structures. The spectacular speed at which the transition takes place (billions of atoms move over several microns during a few milliseconds!) is many orders of magnitude larger than what is expected, based on arguments involving thermally activated behavior on atomic scales. I will discuss peculiarities of the wetting layer and its changes, which appear to coincide with the ultrafast transition of the film morphology. With a widespread interest in nanostructures in general, our results illustrate the generic need to characterize all aspects of nanostructures, both structural and electronic, since small excursions away from equilibrium can have dramatic consequences. T.R.J. Bollmann, R. van Gastel, H.J.W. Zandvliet and B. Poelsema; Phys. Rev. Lett. 107, 116101 (2011); T.R.J. Bollmann, R. van Gastel, H.J.W. Zandvliet and B. Poelsema; New J. Phys. 13, 103025 (2011).

  16. Exploring Stellar Evolution Models of sdB Stars using MESA

    NASA Astrophysics Data System (ADS)

    Schindler, Jan-Torge; Green, Elizabeth M.; Arnett, W. David

    2015-06-01

    Stellar evolution calculations have had great success reproducing the observed atmospheric properties of different classes of stars. Recent detections of g-mode pulsations in evolved He burning stars allow a rare comparison of their internal structure with stellar models. Asteroseismology of subdwarf B (sdB) stars suggests convective cores of 0.22–0.28 M?, ?45% of the total stellar mass. Previous studies found significantly smaller convective core masses (?0.19 M?) at a comparable evolutionary stage. We evolved stellar models with Modules for Experiments in Stellar Astrophysics (MESA) to explore how well the interior structures inferred from asteroseismology can be reproduced by standard algorithms. Our qualitative evolutionary paths, position in the log g-{{T}eff} diagram, and model timescales are consistent with previous results. The sdB masses from our full evolutionary sequences fall within the range of the empirical sdB mass distribution, but are nearly always lower than the median. Using standard MLT with atomic diffusion we find convective core masses of ?0.17–0.18 M?, averaged over the entire sdB lifetime. We can increase the convective core sizes to be as large as those inferred from asteroseismology, but only for extreme values of the overshoot parameter (overshoot gives numerically unstable and physically unrealistic behavior at the boundary). High resolution three-dimensional simulations of turbulent convection in stars suggest that the Schwarzschild criterion for convective mixing systematically underestimates the actual extent of mixing because a boundary layer forms. Accounting for this would decrease the errors in both sdB total and convective core masses.

  17. MESA and NuGrid Simulations of Classical Nova Outbursts and Nucleosynthesis

    NASA Astrophysics Data System (ADS)

    Denissenkov, P.; Herwig, F.; Pignatari, M.; Truran, J. W.

    2014-12-01

    Classical novae are the results of surface thermonuclear explosions of hydrogen accreted by white dwarfs (WDs) from their low-mass main-sequence or red-giant binary companions. Chemical composition analysis of their ejecta shows that nova outbursts occur on both carbon-oxygen (CO) and more massive oxygen-neon (ONe) WDs, and that there is cross-boundary mixing between the accreted envelope and underlying WD. We demonstrate that the state-of-the-art stellar evolution code MESA and post-processing nucleosynthesis tools of NuGrid can successfully be used for modeling of CO and ONe nova outbursts and nucleosynthesis. The convective boundary mixing (CBM) in our 1D numerical simulations is implemented using a diffusion coefficient that is exponentially decreasing with a distance below the bottom of the convective envelope. We show that this prescription produces maximum temperature evolution profiles and nucleosynthesis yields in good agreement with those obtained using the commonly adopted 1D nova model in which the CBM is mimicked by assuming that the accreted envelope has been pre-mixed with WD's material. In a previous paper, we have found that 3He can be produced in situ in solar-composition envelopes accreted with slow rates (? < 10-10 M?/yr) by cold (TWD<107 K) CO WDs, and that convection is triggered by 3He burning before the nova outburst in this case. Here, we confirm this result for ONe novae. Additionally, we find that the interplay between the 3He production and destruction in the solar-composition envelope accreted with an intermediate rate, e.g. ? = 10-10 M?/yr, by the 1.15 M? ONe WD with a relatively high initial central temperature, e.g. TWD =15×106 K, leads to the formation of a thick radiative buffer zone that separates the bottom of the convective envelope from the WD surface.

  18. Radiological survey and evaluation of the fallout area from the Trinity test: Chupadera Mesa and White Sands Missile Range, New Mexico

    SciTech Connect

    Hansen, W.R.; Rodgers, J.C.

    1985-06-01

    Current radiological conditions were evaluated for the site of the first nuclear weapons test, the Trinity test, and the associated fallout zone. The test, located on White Sands Missile Range, was conducted as part of the research with nuclear materials for the World War II Manhattan Engineer District atomic bomb project. Some residual radioactivity attributable to the test was found in the soils of Ground Zero on White Sands Missile Range and the areas that received fallout from the test. The study considered relevant information including historical records, environmental data extending back to the 1940s, and new data acquired by field sampling and measurements. Potential exposures to radiation were evaluated for current land uses. Maximum estimated doses on Chupadera Mesa and other uncontrolled areas are less than 3% of the DOE Radiation Protection Standards (RPSs). Radiation exposures during visits to the US Army-controlled Ground Zero area are less than 1 mrem per annual visit or less than 0.2% of the RPS for a member of the public. Detailed data and interpretations are provided in appendixes. 14 figs., 45 tabs.

  19. ADEM I N ???? 2011 -East West Manufacturing, LLC

    E-print Network

    Pilyugin, Sergei S.

    ADEM I N ???? ©2011 - East West Manufacturing, LLC #12;What is East West? · A Global Contract Manufacturing Company · DomesDc Offshore Manufacturing® ABOUT EAST WEST ©2011 - East West Manufacturing, LLC #12;Unique Strengths · Quality

  20. Middle East versus Saharan dust extinction-to-backscatter ratios

    NASA Astrophysics Data System (ADS)

    Nisantzi, A.; Mamouri, R. E.; Ansmann, A.; Schuster, G. L.; Hadjimitsis, D. G.

    2015-06-01

    Four years (2010-2013) of observations with polarization lidar and sun/sky photometer at the combined European Aerosol Research Lidar Network (EARLINET) and Aerosol Robotic Network (AERONET) site of Limassol (34.7° N, 33° E), Cyprus, were used to compare extinction-to-backscatter ratios (lidar ratios) for desert dust from Middle East deserts and the Sahara. In an earlier article, we analyzed one case only and found comparably low lidar ratios < 40 sr for Middle East dust. The complex data analysis scheme is presented. The quality of the retrieval is checked within a case study by comparing the results with respective Raman lidar solutions for particle backscatter, extinction, and lidar ratio. The applied combined lidar/photometer retrievals corroborate recent findings regarding the difference between Middle East and Saharan dust lidar ratios. We found values from 43-65 sr with a mean (±standard deviation) of 53 ± 6 sr for Saharan dust and from 33-48 sr with a mean of 41 ± 4 sr for Middle East dust for the wavelength of 532 nm. The presented data analysis, however, also demonstrates the difficulties in identifying the optical properties of dust even during outbreak situations in the presence of complex aerosol mixtures of desert dust, marine particles, fire smoke, and anthropogenic haze.

  1. "The March 11th , East Japan Earthquake &

    E-print Network

    Kawato, Suguru

    "The March 11th , East Japan Earthquake & Tsunami": Foreign Student Organizes International Seminar in English After the catastrophe caused by East Japan earthquake, many of the international students studying. The title of the discussion was "How foreigners see the great east Japan earthquake and what should be done

  2. Technical Report Middle East Technical University

    E-print Network

    Erdem, Erkut

    Technical Report Middle East Technical University Department of Computer Engineering A dynamic Department of Computer Engineering Middle East Technical University In¨on¨u Bulvari, 06531, Ankara TURKEY c Middle East Technical University The first version of this METU-CENG Technical Report is published

  3. 1. AERIAL VIEW LOOKING SOUTHEAST, SHOWING WATER WORKS SITE AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW LOOKING SOUTHEAST, SHOWING WATER WORKS SITE AND PHILADELPHIA MUSEUM OF ART ON HILL ABOVE - Fairmount Waterworks, East bank of Schuylkill River, Aquarium Drive, Philadelphia, Philadelphia County, PA

  4. Site overview. West side hangar no. 1. Seen from Severyns ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Site overview. West side hangar no. 1. Seen from Severyns Road. Looking 170 S. - Marine Corps Air Station Tustin, East of Red Hill Avenue between Edinger Avenue & Barranca Parkway, Tustin, Orange County, CA

  5. 52. VIEW SHOWING SITE OF ARIZONA FALL POWER PLANT, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    52. VIEW SHOWING SITE OF ARIZONA FALL POWER PLANT, LOOKING EAST. CURRENT LOCATION OF THE REAL-TIME WATER QUALITY MONITORING STATION Photographer: James Eastwood, July 1990 - Arizona Canal, North of Salt River, Phoenix, Maricopa County, AZ

  6. EastThe Magazine of easT Carolina UniversiTy howTitleiXshifted

    E-print Network

    EastThe Magazine of easT Carolina UniversiTy Fall2012 SidebySide howTitleiXshifted the balance at eCU #12;EastThe Magazine of easT Carolina UniversiTy Fall2012 24 34 F E a T U R E S 16 s i D e B y s i D e in 1972, but women's sports at East Carolina finally have achieved something close to parity with the men

  7. Extreme Ground-Motion Rockfall Deposits on the Nevada Test Site

    Microsoft Academic Search

    J. W. Whitney; S. E. Buckingham; J. E. Magner; R. C. Finkel; J. N. Brune; D. von Seggern; J. S. Honke

    2007-01-01

    In order to detect the evidence of extreme ground motion in the past, we have begun to catalog geomorphic characteristics that distinguish slope deposits strongly influenced by extreme ground motion from deposits primarily influenced by climate processes. Underground nuclear explosions (UNEs) of yields between 200 kilotons and 1.3 megatons were conducted under Pahute Mesa at the Nevada Test site from

  8. Geochemical analyses of ground-water ages, recharge rates, and hydraulic conductivity of the N aquifer, Black Mesa area, Arizona

    USGS Publications Warehouse

    Lopes, Thomas J.; Hoffmann, John P.

    1997-01-01

    The Navajo Nation and Hopi Tribe of the Black Mesa area, Arizona, depend on ground water from the N aquifer to meet most tribal and industrial needs. Increasing use of this aquifer is creating concerns about possible adverse effects of increased ground-water withdrawals on the water resources of the region. A thorough understanding of the N aquifer is necessary to assess the aquifer's response to ground-water withdrawals. This study used geochemical techniques as an independent means of improving the conceptual model of ground-water flow in the N aquifer and to estimate recharge rates and hydraulic conductivity. Ground water flows in a south-southeastward direction from the recharge area around Shonto into the confined part of the N aquifer underneath Black Mesa. Ground-water flow paths diverge in the confined part of the aquifer to the northeast and south. The N aquifer thins to extinction south of Black Mesa. This discontinuity could force ground water to diverge along paths of least resistance. Ground water discharges from the confined part of the aquifer into Laguna Creek and Moenkopi Wash and from springs southwest of Kykotsmovi and southeast of Rough Rock after a residence time of about 35,000 years or more. Recent recharge along the periphery of Black Mesa mixes with older ground water that discharges from the confined part of the aquifer and flows away from Black Mesa. Dissolved-ion concentrations, ratios of dissolved ions, dissolved-gas concentrations, tritium, carbon-13, and chlorine-36 data indicate that water in the overlying D aquifer could be leaking into the confined part of the N aquifer in the southeastern part of Black Mesa. The boundary between the leaky and nonleaky zones is defined roughly by a line from Rough Rock to Second Mesa and separates ground waters that have significantly different chemistries. The Dakota Sandstone and Entrada Formation of the D aquifer could be the sources of leakage. Adjusted radiocarbon ground-water ages and data on isotopes of oxygen and hydrogen indicate that more than 90 percent of the water in the confined part of the N aquifer is older than 10,000 years and was recharged during glacial periods. Estimates of recharge rates made on the basis of ground-water ages, aquifer thicknesses, and assumed porosities indicate that the annual average recharge rate in the northwestern part of the study area during the glacial periods was about four times the average annual rate of the past 10,000 years, and that recharge rates for the past 10,000 years are less than modern recharge rates assumed in a previous study. Estimates of horizontal hydraulic conductivity were 0.95 and 1.16 feet per day for the northeast and southwest flow paths, respectively. These values are within the range of hydraulic conductivities calculated from aquifer tests, which ranged from 0.05 to 2.1 feet per day and averaged 0.65 foot per day.

  9. Contaminant Transport Parameters for the Groundwater Flow and Contaminant Transport Model of Corrective Action Units 101 and 102: Central and Western Pahute Mesa, Nye County, Nevada, Revision 0

    SciTech Connect

    Drici, Warda

    2003-08-01

    This report documents the analysis of the available transport parameter data conducted in support of the development of a Corrective Action Unit (CAU) groundwater flow model for Central and Western Pahute Mesa: CAUs 101 and 102.

  10. Estimation of Unsaturated Zone Traveltimes for Rainier Mesa and Shoshone Mountain, Nevada Test

    E-print Network

    in cooperation with the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office is in the public domain, permission must be secured from the individual copyright owners to reproduce any.................................................................................................................................................................... 2 Motivation

  11. ESONET LIDO Demonstration Mission: the East Sicily node

    NASA Astrophysics Data System (ADS)

    Riccobene, Giorgio; Favali, Paolo; Andrè, Michel; Chierici, Francesco; Pavan, Gianni; Esonet Lido Demonstration Mission Team

    2010-05-01

    Off East Sicily (at 2100 m depth, 25 km off the harbour of Catania) a prototype of a cabled deep-sea observatory (NEMO-SN1) was set up and has been operational in real-time since 2005 (the cabled deep-sea multi-parameter station SN1, equipped with geophysical and environmental sensors and the cabled NEMO-O?DE, equipped with 4 broadband hydrophones). The Western Ionian Sea is one of the node sites for the upcoming European permanent underwater network (EMSO). Within the activities of the EC project ESONET-NoE some demonstration missions have been funded. The LIDO-DM (Listening to the Deep Ocean-Demonstration Mission) is one of these and is related to two sites, East Sicily and Iberian Margin (Gulf of Cadiz), the main aims being geo-hazards monitoring and warning (seismic, tsunami, and volcanic) and bio-acoustics. The LIDO-DM East Sicily installation represents a further major step within ESONET-NoE, resulting in a fully integrated system for multidisciplinary deep-sea science, capable to transmit and distribute data in real time to the scientific community and to the general public. LIDO-DM East Sicily hosts a large number of sensors aimed at monitoring and studying oceanographic and environmental parameters (by means of CTD, ADCP, 3-C single point current meter, turbidity meter), geophysical phenomena (low frequency hydrophones, accelerometer, gravity meter, vector and scalar magnetometers, seismometer, absolute and differential pressure gauges), ocean noise monitoring and identification and tracking of biological acoustic sources in deep sea. The latter will be performed using two tetrahedral arrays of 4 hydrophones, located at a relative distance of about 5 km, and at about 25 km from the shore. The whole system will be connected and powered from shore, by means of the electro-optical cable net installed at the East Sicily Site Infrastructure, and synchronised with GPS. Sensors data sampling is performed underwater and transmitted via optical fibre link, with optimal S/N ratio for all signals. This will also permit real-time data acquisition, analysis and distribution on-shore. Innovative electronics for the off-shore data acquisition and transmission systems has been designed, built and tested. A dedicated computing and networking infrastructure for data acquisition, storage and distribution through the internet has been also created. The deployment and connection of the deep sea structures will be performed using the dedicated ROV and Deep Sea Shuttle handling facilities (PEGASO, owned by INGV and INFN). LIDO-DM constitutes the enhancement of the Western Ionian site in view of the EMSO Research Infrastructure.

  12. Stability and predictors of change in salivary cortisol measures over six years: MESA.

    PubMed

    Wang, Xu; Sánchez, Brisa N; Golden, Sherita Hill; Shrager, Sandi; Kirschbaum, Clemens; Karlamangla, Arun S; Seeman, Teresa E; Roux, Ana V Diez

    2014-11-01

    A major challenge in characterizing features of the daily cortisol curve is variability in features over time. Few studies have examined the stability of daily features of the cortisol curve over long periods or the predictors of long term changes. Repeated salivary cortisol measures on 580 adults from the MESA Stress study were used to examine the stability of various features of the daily cortisol curve (wakeup value, the cortisol awakening response (CAR), the early and late decline slope and the area under the curve (AUC)), over short periods (several days) and long periods (approximately 6-years) and to investigate the association of demographic factors with the changes. Intraclass correlation coefficients (ICCs) were used to estimate the short and long term stability. Piecewise linear mixed models were used to assess factors associated with changes in features over time. For most features, short term stability (ICCs: 0.17-0.74) was higher than long term stability (ICCs: 0.05-0.42), and long term stability was highest when several days were averaged for each time point. The decline over the day showed the highest long term stability: when several days for each wave were averaged the stability of the daily decline slope across 6 years was similar (or higher) than the stability across short periods. AUC had high stability over short periods (ICCs: 0.65-0.74) but much lower stability across long periods (ICC: 0.05). All features of daily cortisol curve investigated changed significantly over the approximately 6 year follow-up period. The wakeup cortisol became higher; the CAR became smaller; both the early and late decline became flatter; and the AUC became larger. Hispanics experienced significantly larger increases in the wakeup value; and African-Americans and Hispanics showed less flattening over time of the early decline slope than Non-Hispanic Whites. Our findings have implications for characterization of features in studies linking cortisol to health outcomes. The presence of variability over time suggests opportunities for future investigation of the predictors of changes over time as well as the links between these changes and health outcomes. PMID:25137485

  13. The East African rift system

    Microsoft Academic Search

    Jean Chorowicz

    2005-01-01

    This overview paper considers the East African rift system (EARS) as an intra-continental ridge system, comprising an axial rift. It describes the structural organization in three branches, the overall morphology, lithospheric cross-sections, the morphotectonics, the main tectonic features—with emphasis on the tension fractures—and volcanism in its relationships with the tectonics. The most characteristic features in the EARS are narrow elongate

  14. School of East Asian Studies Employability Statement Graduates of the School of East Asian Studies go on to rewarding careers East Asia

    E-print Network

    Martin, Stephen John

    School of East Asian Studies Employability Statement Graduates of the School of East Asian Studies on the knowledge of the East Asian region, the skills and experience, and the high level of cultural agility to reflect the rapid pace of change in East Asian societies, and to emphasise the understanding of East Asia

  15. 10. DETAILED VIEW OF THE EAST ELEVATION. THE UPPER SET ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAILED VIEW OF THE EAST ELEVATION. THE UPPER SET OF WINDOWS PROVIDE LIGHT FOR THE DELIVERY LEVEL. THE LOWER SETS OF WINDOWS PROVIDE LIGHT TO THREE STORY SPACE BENEATH THE DELIVERY LEVEL AND BEHIND THE ORE STORAGE BINS. NOTE THE ORE DELIVER TRESTLE AT THE TIME THE PHOTOGRAPH WAS TAKEN, THE MODERN CEMENT MIXER AND WHEELBARROWS WERE FOR THIS WORK. NOTE THE MORTAR BOXES ON THEIR SIDES. IT IS UNCLEAR IF THESE WERE FROM EARLIER STAMPS AT THIS MILL OR IF THEY WERE BROUGHT TO THE SITE FROM OTHER MILLS IN THE REGION. RISDON IRON WORKS IS CAST INTO THE MORTARS AND THEY ALSO BEAR A PLATE: WHITE, ROGERS AND CO. MILL WRIGHTS. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

  16. Paternal phylogeography and genetic diversity of East Asian goats.

    PubMed

    Waki, A; Sasazaki, S; Kobayashi, E; Mannen, H

    2015-06-01

    This study was a first analysis of paternal genetic diversity for extensive Asian domestic goats using SRY gene sequences. Sequencing comparison of the SRY 3'-untranslated region among 210 Asian goats revealed four haplotypes (Y1A, Y1B, Y2A and Y2B) derived from four variable sites including a novel substitution detected in this study. In Asian goats, the predominant haplotype was Y1A (62%) and second most common was Y2B (30%). Interestingly, the Y2B was a unique East Asian Y chromosomal variant, which differentiates eastern and western Eurasian goats. The SRY geographic distribution in Myanmar and Cambodia indicated predominant the haplotype Y1A in plains areas and a high frequency of Y2B in mountain areas. The results suggest recent genetic infiltration of modern breeds into South-East Asian goats and an ancestral SRY Y2B haplotype in Asian native goats. PMID:25917305

  17. Occurrence of cymothoid isopod from Miri, East Malaysian marine fishes.

    PubMed

    Anand Kumar, A; Rameshkumar, Ganapathy; Ravichandran, Samuthirapandian; Priya, E Rethna; Nagarajan, Ramasamy; Leng, Alex Goh Kwang

    2015-06-01

    To identify the isopod parasite, which has been recorded from Miri, East Malaysian marine fishes. During the present study, four cymothoid isopods are reported three genera, including Cymothoa eremita, Lobothorax typus, Nerocila longispina and Nerocila loveni. Nerocila longispina and N. loveni are also previously reported from Malaysia and two additional cymothoids C. eremita and L. typus are reported for the first record of Miri coast, East Malaysia. New hosts were identified for N. loveni on Chirocentrus dorab for the first time in the world fauna. The Parasitological indexes were calculated. The site of attachment of the parasites on their hosts was also observed. These parasites can cause the damage in gill, eye and internal organ including swim bladder. Marine fish parasitology is a rapidly developing field of aquatic science. PMID:26064001

  18. Humboldt National Forest East Mormon

    E-print Network

    Laughlin, Robert B.

    Range Nevada Test Site ASH MEADOWS NATIONAL WILDLIFE REFUGE DESERT NATIONAL WILDLIFE RANGE PAHRANAGAT Sunrise ManorLas Vegas North Las Vegas Nevada Test Site Lake Mohave Lake Mead Esmeralda County Nye County

  19. Structural geology of the proposed site area for a high-level radioactive waste repository, Yucca Mountain, Nevada

    USGS Publications Warehouse

    Potter, C.J.; Day, W.C.; Sweetkind, D.S.; Dickerson, R.P.

    2004-01-01

    Geologic mapping and fracture studies have documented the fundamental patterns of joints and faults in the thick sequence of rhyolite tuffs at Yucca Mountain, Nevada, the proposed site of an underground repository for high-level radioactive waste. The largest structures are north-striking, block-bounding normal faults (with a subordinate left-lateral component) that divide the mountain into numerous 1-4-km-wide panels of gently east-dipping strata. Block-bounding faults, which underwent Quaternary movement as well as earlier Neogene movement, are linked by dominantly northwest-striking relay faults, especially in the more extended southern part of Yucca Mountain. Intrablock faults are commonly short and discontinuous, except those on the more intensely deformed margins of the blocks. Lithologic properties of the local tuff stratigraphy strongly control the mesoscale fracture network, and locally the fracture network has a strong influence on the nature of intrablock faulting. The least faulted part of Yucca Mountain is the north-central part, the site of the proposed repository. Although bounded by complex normal-fault systems, the 4-km-wide central block contains only sparse intrablock faults. Locally intense jointing appears to be strata-bound. The complexity of deformation and the magnitude of extension increase in all directions away from the proposed repository volume, especially in the southern part of the mountain where the intensity of deformation and the amount of vertical-axis rotation increase markedly. Block-bounding faults were active at Yucca Mountain during and after eruption of the 12.8-12.7 Ma Paintbrush Group, and significant motion on these faults postdated the 11.6 Ma Rainier Mesa Tuff. Diminished fault activity continued into Quaternary time. Roughly half of the stratal tilting in the site area occurred after 11.6 Ma, probably synchronous with the main pulse of vertical-axis rotation, which occurred between 11.6 and 11.45 Ma. Studies of sequential formation of tectonic joints, in the context of regional paleostress studies, indicate that north- and northwest-striking joint sets formed coevally with the main faulting episode during regional east-northeast-west-southwest extension and that a prominent northeast-striking joint set formed later, probably after 9 Ma. These structural analyses contribute to the understanding of several important issues at Yucca Mountain, including potential hydrologic pathways, seismic hazards, and fault-displacement hazards. ?? 2004 Geological Society of America.

  20. An inventory of long-lived radionuclides residual from underground nuclear testing at the Nevada test site, 1951-1992.

    PubMed

    Smith, D K; Finnegan, D L; Bowen, S M

    2003-01-01

    An inventory of long-lived radionuclides produced by 828 underground nuclear tests conducted at the Nevada test site (NTS) from 1951 to 1992 includes residual tritium, fission products, actinides, and activation products. Recently, the US Department of Energy approved the declassification of the NTS radionuclide inventory by principal geographic test centers. This permits unclassified publication of radionuclide totals for the Yucca Flat, Pahute Mesa-Area 19, Pahute Mesa-Area 20, Frenchman Flat, and Rainier Mesa/Shoshone Mountain testing locations. Activities are reported as of September 23, 1992, the date of the last underground nuclear test conducted at the NTS, and September 23, 2492, after 500 years of radioactive decay. The availability of these data affords an opportunity for the analysis of the radiologic source term within the boundaries of local hydrogeologic units and provides insight to where radionuclides are sited relative to potential exposure pathways. PMID:12634000

  1. An Investigation of Amphitheater-Headed Canyon Distribution, Morphology Variation, and Longitudinal Profile Controls in Escalante and Tarantula Mesa, Utah.

    NASA Astrophysics Data System (ADS)

    Ryan, A. J.; Whipple, K. X.

    2014-12-01

    Amphitheater-headed canyons are primarily distinguished from typical fluvial channels by their abrupt headwall terminations. A key goal in the study of river canyons is to establish a reliable link between form and formation processes. This is of particular significance for Mars, where, if such links can be established, amphitheater-headed canyons could be used to determine ancient erosion mechanisms and, by inference, climate conditions. Type examples in arid regions on Earth, such as in Escalante River, Utah, previously have been interpreted as products of groundwater seepage erosion. We investigate amphitheater-headed canyons in Escalante and Tarantula Mesa where variations in canyon head morphology may hold clues for the relative roles of rock properties and fluvial and groundwater processes. In lower Escalante, amphitheaters are only present where canyons have breached the Navajo Sandstone - Kayenta Formation contact. In some canyons, amphitheater development appears to have been inhibited by an abundance of coarse bedload. In Tarantula Mesa, canyons have a variety of headwalls, from amphitheaters to stepped knickzones. Headwall morphology distribution is directly related to the spatially variable presence of knickpoint-forming, fine-grained interbeds within cliff-forming sandstones. Amphitheaters only form where the sandstone unit is undisrupted by these interbeds. Finally, most canyons in Escalante and Tarantula Mesa, regardless of substrate lithology, amphitheater presence, or groundwater spring intensity, are well described by a slope-area power law relationship with regionally constant concavity and normalized steepness indices. This suggests that all channels here are subject to the same erosion rates, independent of groundwater weathering intensity. Thus: 1) variations in canyon headwall form do not necessary relate to differences in fluvial history, 2) stratigraphic variations are clearly of importance in sedimentary canyon systems, and 3) although groundwater seepage weathering is clearly active in many canyons in Utah and may be responsible for amphitheater development, fluvial forces appear to be the dominant erosive force responsible for shaping stream profiles.

  2. InP-based reversed-mesa ridge-waveguide structure for high-performance long-wavelength laser diodes

    Microsoft Academic Search

    Masahiro Aoki; Masaaki Komori; Tomonobu Tsuchiya; Hiroshi Sato; Kouji Nakahara; Kazuhisa Uomi

    1997-01-01

    A novel structure for an InP-based ridge-waveguide (RWG) laser is demonstrated. It has a reverse-trapezoid-ridge shape which offers reduced threshold current and smaller electrical and thermal resistances over the conventional vertical-mesa (VM) RWG devices. We found this new RWG laser quite suitable for wide-temperature-range and high-power operations. 1.3-1.55-?m wavelength strained InGaAsP-InP multiple quantum-well (MQW) lasers were demonstrated with the new

  3. Soil thermal properties at two different sites on James Ross Island in the period 2012/13

    NASA Astrophysics Data System (ADS)

    Hrbá?ek, Filip; Láska, Kamil

    2015-04-01

    James Ross Island (JRI) is the largest island in the eastern part of the Antarctic Peninsula. Ulu Peninsula in the northern part of JRI is considered the largest ice free area in the Maritime Antarctica region. However, information about permafrost on JRI, active layer and its soil properties in general are poorly known. In this study, results of soil thermal measurements at two different sites on Ulu Peninsula are presented between 1 April 2012 and 30 April 2013. The study sites are located (1) on an old Holocene marine terrace (10 m a. s. l.) in the closest vicinity of Johann Gregor Mendel (JGM) Station and (2) on top of a volcanic plateau named Johnson Mesa (340 m a. s. l.) about 4 km south of the JGM Station. The soil temperatures were measured at 30 min interval using platinum resistance thermometers Pt100/8 in two profiles up to 200 cm at JGM Station and 75 cm at Johnson Mesa respectively. Decagon 10HS volumetric water content sensors were installed up 30 cm at Johnson Mesa to 50 cm at JGM Station, while Hukseflux HFP01 soil heat flux sensors were used for direct monitoring of soil physical properties at 2.5 cm depth at both sites. The mean soil temperature varied between -5.7°C at 50 cm and -6.3°C at 5 cm at JGM Station, while that for Johnson Mesa varied between -6.9°C at 50 cm and -7.1°C at 10 cm. Maximum active layer thickness estimated from 0 °C isotherm reached 52 cm at JGM Station and 50 cm at Johnson Mesa respectively which corresponded with maximum observed annual temperature at 50 cm at both sites. The warmest part of both profiles detected at 50 cm depth corresponded with maximum thickness of active layer, estimated from 0°C isotherm, reached 52 cm at JGM Station and 50 cm at Johnson Mesa respectively. Volumetric water content at 5 cm varied around 0.25 m3m-3 at both sites. The slight increase to 0.32 m3m-3 was observed at JGM Station at 50 cm and at Johnson Mesa at 30 cm depth. Soil texture analysis showed distinctly higher share of coarser fraction >2 mm at Johnson Mesa than at JGM Station. Comparison of both sites indicated that mean ground temperature at 50 cm depth was higher by 1.2 °C at JGM station, although the active layer was thicker by 2 cm only. It can therefore be concluded that soil physical properties like texture and moisture may significantly affect thermal regime at boundary between AL and permafrost table during individual thawing seasons.

  4. Thermal\\/mechanical analyses of G-Tunnel field experiments at Rainier Mesa, Nevada

    Microsoft Academic Search

    S. J. Bauer; L. S. Costin; E. P. Chen; J. R. Tillerson

    1988-01-01

    Analysis methods (models) are currently being developed to support thermal, mechanical, and thermomechanical aspects of repository design and performance assessment of the candidate Yucca Mountain high-level nuclear waste site. Credibility of these models, and therefore of design and performance analyses, will in part be determined through comparison of calculated and measured response (validation) for large-scale field experiments. This paper discusses

  5. Petroleum geology of East Siberia

    SciTech Connect

    Clarke, J.W.

    1986-05-01

    The unmetamorphosed geologic section of the East Siberian region consists of upper Proterozoic clastic and carbonate sediments; Cambrian evaporites, carbonates, and black shales; Ordovician to permian clastic and carbonate sediments; Triassic basaltic flows and intrusives; and Jurassic and Cretaceous clastic sediments. During the Cambrian, a barrier reef extended across the region. Salt and anhydrite were deposited in the vast lagoon to the southwest behind this reef. The structure is typical of platforms; broad, gentle warps are complicated by smaller highs. The total area of East Siberia that is potentially favorable for oil and gas is 3.23 million km/sup 2/ (1.24 million mi/sup 2/). Deposits in the Lena-Tunguska province are in stratigraphic traps in Proterozoic to Cambrian clastic and carbonate sediments sealed by Cambrian salt and in anticlinal structures in areas of salt tectonics. Source beds seem to be Proterozoic. Pools in the Khatanga-Vilyuy province are in anticlines in Triassic, Jurassic, and Cretaceous clastic sedimentary rocks. Source beds are Permian carbonaceous shale. Most discoveries have been of gas; however, several fields have oil rings. The traps appear to have been filled by oil at one time. Undiscovered recoverable petroleum resources of East Siberia are assessed, at 90% probability, within the range of 2.2-14.6 billion bbl of oil and 72-278 tcf of gas. Mean estimates are 7.3 billion bbl of oil and 158 tcf of gas, respectively. Gas-hydrate deposits in the Lena-Vilyuy province, where permafrost is more than 400 m thick, are estimated to contain 27 tcf of possibly recoverable gas.

  6. Tectonic structure of East Antarctica

    NASA Astrophysics Data System (ADS)

    Leychenkov, German; Grikurov, Garrik; Golynsky, Alexander

    2013-04-01

    First overviews of tectonic structure of the Southern Continent were made by the pioneers of Antarctic earth science investigations almost 100 years ago. Despite rapidly advancing international geological studies under the Antarctic Treaty, the presentations of Antarctic tectonic structure remained largely speculative until the end of the past century when implementation of modern analytical and remote-sensing research technologies enabled compilation of more credible tectonic models of Antarctica. The East Antarctic bedrock consists mainly of the Precambrian crystalline complexes and the Paleozoic-Early Mesozoic platform units. Crystalline Shield is locally complicated by Neoproterozoic aulacogenes and Late Paleozoic to Mesozoic rifts. Shield assemblages reliably recognized in coastal outcrops indicate the predominant occurrence of Archean cratonic nuclei and Mesoproterozoic mobile belts. The undisturbed platform cover strata are exposed in East Antarctica mainly along its boundary with West Antarctica. Tectonic structure of ice-covered regions (more that 99% of the East Antarctic territory) is interpreted using mostly magnetic and bedrock topography data, but other geophysical and geological information (satellite, airborne and over-ice gravity; seismology; active seismics; erratics; detrital zircons dates; etc.) is also important. Archean cratons are geologically documented in western Dronning Maud Land, Enderby Land, Princess Elizabeth Land and in the southern Prince Charles Mts. Their distribution under the ice is marked by a specific magnetic pattern including low-amplitude mosaic and/or high-amplitude long-wavelength anomalies. The most extensive ancient craton being 1000 km across is believed to extend from the southern Prince Charles Mts. to the Gamburtsev Mts. Mesoproterozoic mobile belts are distinguished by elongated high-amplitude magnetic anomalies and are mapped along the costal area as the zone of 250-600 km wide. The Gamburtsev Mts. area is also interpreted to be a part of Mesoproterozoic mobile belt. Precambrian aulacogens and Paleozoic to Mesozoic rifts are more difficult to recognize with confidence from geophysical data, except the largest Lambert-Amery rift which is well expressed in potential fields and bedrock topography. Many other linear bedrock depressions are believed to result from ice erosion which probably amplified structural features such as faults, sutures, boundaries of tectonic provinces. Extensive platform cover is assumed to occur mainly in vast subglacial lowlands of East Antarctic interior. Geophysical data, as well as erratics found in costal moraines and offshore sediments, suggest that Beacon and/or Ferrar Supergroups or their stratigraphic/structural equivalents can be expected to continue under the ice beyond the limits of the Ross Orogen where they may rest on the older platform complexes and/or directly on the crystalline basement.

  7. Orthopedic Injuries Following the East Azerbaijan Earthquake

    PubMed Central

    Elmi, Asghar; Ganjpour Sales, Jafar; Tabrizi, Ali; Soleimanpour, Jafar; Mohseni, Mohammad Ali

    2013-01-01

    Background Evaluating demographic characteristics, distribution and types of orthopedic injuries following major earthquakes may be helpful in future planning for disasters. Objectives This study aimed to analyze data from trauma patients with extremity injury resulting from the earthquakes of East Azerbaijan, Iran. Patients and Methods Medical records of 686 patients admitted to Shohada hospital, Trauma Center of Tabriz University of Medical Sciences were reviewed. There were 200 patients with extremity injury assessed. Demographic characteristics and patterns of injuries in these patients were evaluated. Results In this study, there were 105 females (52.5%) and 95 males (47.5%), out of which, 6 (3%) patients with associated severe head injuries died. The most common sites of injury were lower extremities (81 patients, 41.5% of total victims) while 32 patients (16%) suffered from both upper and lower extremity injuries. Open Fractures were seen in lower extremities of 26 (13%) patients. Compartment syndrome was observed in 3 (1.5%) patients with lower limb fractures. Also, 42 (21%) patients living in Tabriz were injured while they were running away (falling down the stairs and jumping out of windows). Conclusions Extremity injuries especially open fractures of lower limbs account for the majority of hospitalized victims. Compartment syndrome is one of the main problems that should be addressed. Our study demonstrates that people still need more education regarding earthquakes and the government should direct more attention to this issue. PMID:24350141

  8. Atmospheric Monitoring with a LIDAR and an Infra-red Camera at Black Rock Mesa in the Utah desert

    NASA Astrophysics Data System (ADS)

    Chikawa, Michiyuki; Doura, Koji; Ogio, Shoichi; et al.

    An atmospheric monitoring system has installed at Black Rock Mesa in the Utah desert to study the properties of atmosphere using a LIDAR(Light Detection And Ranging) system and an infra-red(IR) camera for cosmic rays experiment. The aims of atmospheric monitoring are to calibrate observed cosmic ray's energy and to determine detectable region of the fluorescence detectors. For these reasons, the atmospheric extinction coefficient and the cloudiness should be determined precisely as possible. The LIDAR system consisits of a laser device and a light receiver with a photo multiplier tube(PMT) mounting on a steerable base. The laser emits pulse lights successively into the atmoshere and the receiver detects scattered faint lights by the PMT. To determine the atmospheric extinction coefficient, a large amount of data has been acquired using LIDAR system at Black Rock Mesa commencing from July 2005.A lot of data is analized by means of so-called the slope method and/or the Klett's method after due consideration of atmospheric pressure effect. A result consistent with a calculation of the Rayleigh scattering is obtained for the vertical extinction coefficient above an altitude of several kilometres in a calm weather. It is also found that the one-dimentional atmospheric density model is reasonable assumption on a limitative condition in the Utah desert. The current results from the atmospheric monitoring with the LIDAR and the IR camera will be presented in full detail.

  9. Lg Attenuation Modeling in the Middle East

    NASA Astrophysics Data System (ADS)

    Pasyanos, M. E.; Matzel, E. M.; Walter, W. R.; Rodgers, A. J.

    2008-12-01

    We present a broadband tomographic model of Lg attenuation in the Middle East derived from source- and site-corrected amplitudes. The study region spans from Turkey through the Arabian Peninsula and Iran to Pakistan, Afghanistan, and northwest India. Absolute amplitude measurements are made on hand-selected and carefully windowed seismograms for tens of stations and thousands of crustal earthquakes resulting in excellent coverage of the region. We have modified the standard attenuation tomography technique to more explicitly define the earthquake source expression in terms of the seismic moment. This facilitates the use of the model to predict the expected amplitudes of new events, an important consideration for earthquake hazard or explosion monitoring applications. We will discuss the updated method and implications of this parameterization. A conjugate gradient method is used to tomographically invert the amplitude dataset of over 8000 paths. We solve for Q variation, as well as site and source terms, for a wide range of frequencies ranging from 0.5 -- 10 Hz. The attenuation results have a strong correlation to tectonics. Shields have low attenuation, while tectonic regions have high attenuation, with the highest attenuation at 1 Hz found in eastern Turkey. The results also compare favorably to other studies in the region made using Lg propagation efficiency, Lg/Pg amplitude ratios and two-station methods. We tomographically invert the amplitude measurements for each frequency independently. In doing so, it appears the frequency-dependence of attenuation is not compatible with the power law representation of Q(f). This research was performed under the auspices of the U.S. Department of Energy by the Lawrence Livermore National Laboratory under contract number DE-AC52-07NA27344. This is LLNL contribution LLNL-ABS-406761.

  10. 8. PARK AVENUE EAST OF CEDAR STREET (400 Block). THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. PARK AVENUE EAST OF CEDAR STREET (400 Block). THE MARCHION HARDWARE BUILDING WAS DESIGNED BY W.W. HISLOP, AND BUILT IN 1895. THE GROUND FLOOR WAS RENOVATED SOME TIME IN THE 1930s. IN THE CENTER IS THE IMPERIAL BLOCK (ca. 1920), AND THE FULLER DRUG COMPANY (1918-1932).THE FULLER SITE WAS OCCUPIED BY THE HIGHLAND THEATER FROM 1932 TO 1972, AND RETAINS MUCH OF THE INTERIOR DECORATION FROM THAT PERIOD - Anaconda Historic District, Park & Commercial Streets, Main Street vicinity, Anaconda, Deer Lodge County, MT

  11. 33. VIEW OF BASEMENT UNDER EAST BOILER ROOM LOOKING TOWARD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. VIEW OF BASEMENT UNDER EAST BOILER ROOM LOOKING TOWARD WEST BOILER ROOM BASEMENT THROUGH THE ASH TRANSFER TUNNEL. ASH HOPPER FOR BOILER 900 IS ON THE RIGHT. NOTE THE TRACKS ALONG THE FLOOR OF THE TUNNEL. A SMALL ELECTRIC LOCOMOTIVE HAULED CARS FOR TRANSFERRING ASH FROM BOILERS TO DISPOSAL SITES OUTSIDE THE BUILDING. THIS SYSTEM BECAME OBSOLETE IN 1938 WHEN BOILERS IN THE WEST BOILER ROOM WERE REMOVED AND PULVERIZED COAL WAS ADOPTED AS THE FUEL. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  12. Pacific-East Asian Teleconnection: How Does ENSO Affect East Asian Climate?

    Microsoft Academic Search

    Bin Wang; Renguang Wu; Xiouhua Fu

    2000-01-01

    Observational evidence is presented to show a teleconnection between the central Pacific and East Asia during the extreme phases of ENSO cycles. This Pacific-East Asian teleconnection is confined to the lower troposphere. The key system that bridges the warm (cold) events in the eastern Pacific and the weak (strong) East Asian winter monsoons is an anomalous lower-tropospheric anticyclone (cyclone) located

  13. Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1 IADC Middle East Drilling Conference

    E-print Network

    Aamodt, Agnar

    Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1 IADC Middle East Drilling Conference Case-Based Reasoning, a method for gaining experience and giving advise on how to avoid and how to free stuck drill strings. IADC Middle East Drilling Conference, Dubai, Nov. 3 - 4, 1998. P

  14. Strontium Isotopic Composition of Paleozoic Carbonate Rocks in the Nevada Test Site Vicinity, Clark, Lincoln, and Nye Counties, Nevada, and Inyo County, California

    USGS Publications Warehouse

    Paces, James B.; Peterman, Zell E.; Futo, Kiyoto; Oliver, Thomas A.; Marshall, Brian D.

    2007-01-01

    Ground water moving through permeable Paleozoic carbonate rocks represents the most likely pathway for migration of radioactive contaminants from nuclear weapons testing at the Nevada Test Site, Nye County, Nevada. The strontium isotopic composition (87Sr/86Sr) of ground water offers a useful means of testing hydrochemical models of regional flow involving advection and reaction. However, reaction models require knowledge of 87Sr/86Sr data for carbonate rock in the Nevada Test Site vicinity, which is scarce. To fill this data gap, samples of core or cuttings were selected from 22 boreholes at depth intervals from which water samples had been obtained previously around the Nevada Test Site at Yucca Flat, Frenchman Flat, Rainier Mesa, and Mercury Valley. Dilute acid leachates of these samples were analyzed for a suite of major- and trace-element concentrations (MgO, CaO, SiO2, Al2O3, MnO, Rb, Sr, Th, and U) as well as for 87Sr/86Sr. Also presented are unpublished analyses of 114 Paleozoic carbonate samples from outcrops, road cuts, or underground sites in the Funeral Mountains, Bare Mountain, Striped Hills, Specter Range, Spring Mountains, and ranges east of the Nevada Test Site measured in the early 1990's. These data originally were collected to evaluate the potential for economic mineral deposition at the potential high-level radioactive waste repository site at Yucca Mountain and adjacent areas (Peterman and others, 1994). Samples were analyzed for a suite of trace elements (Rb, Sr, Zr, Ba, La, and Ce) in bulk-rock powders, and 87Sr/86Sr in partial digestions of carbonate rock using dilute acid or total digestions of silicate-rich rocks. Pre-Tertiary core samples from two boreholes in the central or western part of the Nevada Test Site also were analyzed. Data are presented in tables and summarized in graphs; however, no attempt is made to interpret results with respect to ground-water flow paths in this report. Present-day 87Sr/86Sr values are compared to values for Paleozoic seawater present at the time of deposition. Many of the samples have 87Sr/86Sr compositions that remain relatively unmodified from expected seawater values. However, rocks underlying the northern Nevada Test Site as well as rocks exposed at Bare Mountain commonly have elevated 87Sr/86Sr values derived from post-depositional addition of radiogenic Sr most likely from fluids circulating through rubidium-rich Paleozoic strata or Precambrian basement rocks.

  15. Strontium Isotopic Composition of Paleozoic Carbonate Rocks in the Nevada Test Site Vicinity, Clark, Lincoln, and Nye Counties, Nevada and Inyo County, California.

    SciTech Connect

    James B. Paces; Zell E. Peterman; Kiyoto Futa; Thomas A. Oliver; and Brian D. Marshall.

    2007-08-07

    Ground water moving through permeable Paleozoic carbonate rocks represents the most likely pathway for migration of radioactive contaminants from nuclear weapons testing at the Nevada Test Site, Nye County, Nevada. The strontium isotopic composition (87Sr/86Sr) of ground water offers a useful means of testing hydrochemical models of regional flow involving advection and reaction. However, reaction models require knowledge of 87Sr/86Sr data for carbonate rock in the Nevada Test Site vicinity, which is scarce. To fill this data gap, samples of core or cuttings were selected from 22 boreholes at depth intervals from which water samples had been obtained previously around the Nevada Test Site at Yucca Flat, Frenchman Flat, Rainier Mesa, and Mercury Valley. Dilute acid leachates of these samples were analyzed for a suite of major- and trace-element concentrations (MgO, CaO, SiO2, Al2O3, MnO, Rb, Sr, Th, and U) as well as for 87Sr/86Sr. Also presented are unpublished analyses of 114 Paleozoic carbonate samples from outcrops, road cuts, or underground sites in the Funeral Mountains, Bare Mountain, Striped Hills, Specter Range, Spring Mountains, and ranges east of the Nevada Test Site measured in the early 1990's. These data originally were collected to evaluate the potential for economic mineral deposition at the potential high-level radioactive waste repository site at Yucca Mountain and adjacent areas (Peterman and others, 1994). Samples were analyzed for a suite of trace elements (Rb, Sr, Zr, Ba, La, and Ce) in bulk-rock powders, and 87Sr/86Sr in partial digestions of carbonate rock using dilute acid or total digestions of silicate-rich rocks. Pre-Tertiary core samples from two boreholes in the central or western part of the Nevada Test Site also were analyzed. Data are presented in tables and summarized in graphs; however, no attempt is made to interpret results with respect to ground-water flow paths in this report. Present-day 87Sr/86Sr values are compared to values for Paleozoic seawater present at the time of deposition. Many of the samples have 87Sr/86Sr compositions that remain relatively unmodified from expected seawater values. However, rocks underlying the northern Nevada Test Site as well as rocks exposed at Bare Mountain commonly have elevated 87Sr/86Sr values derived from post-depositional addition of radiogenic Sr most likely from fluids circulating through rubidium-rich Paleozoic strata or Precambrian basement rocks.

  16. Contemporary crustal deformation in east Asia constrained by Global Positioning System measurements

    Microsoft Academic Search

    Zheng-kang Shen; Chengkun Zhao; An Yin; Yanxing Li; David D. Jackson; Peng Fang; Danan Dong

    2000-01-01

    Global Positioning System (GPS) measurements collected since the early 90's allow us to derive geodetic velocities at 16 permanent stations in east Asia and 68 campaign mode sites in north China. The resulting velocity field shows the following: (1) Contrary to the early inferences that the Shanxi Rift has accommodated significant right-slip motion, our results suggest that the rift system,

  17. Aerosol radiative forcing over east Asia determined from ground-based solar radiation measurements

    Microsoft Academic Search

    Do-Hyeong Kim; B. J. Sohn; Teruyuki Nakajima; Tamio Takamura

    2005-01-01

    We developed a method of retrieving aerosol optical properties and their associated radiative forcing from simultaneously measured sky radiation and surface solar flux data. The method is then applied to data sets collected at Mandalgovi, Dunhuang, Yinchuan, and Sri-Samrong sites of the Skyradiometer Network (SKYNET), and at Anmyon, Gosan, and Amami-Oshima, to examine the aerosol characteristics of east Asia. From

  18. Temporal and spatial variability of the surface energy balance in Dronning Maud Land, East Antarctica

    Microsoft Academic Search

    C. H. Reijmer; J. Oerlemans

    2002-01-01

    We present data of nine Automatic Weather Stations (AWS), which are located in Dronning Maud Land (DML), East Antarctica, since the austral summer of 1997. Potential temperature and wind speed are maximum at the sites with the steepest surface slope, i.e., at the edge of the Antarctic plateau. Specific humidity and accumulation decrease with elevation and distance from the coast.

  19. A Review Of Mercury in Lake Victoria, East Africa: Implications for Human and Ecosystem Health

    Microsoft Academic Search

    Linda M. Campbell; D. G. Dixon; R. E. Hecky

    2003-01-01

    Lake Victoria, East Africa, has been the site of many recent studies measuring mercury (Hg) concentrations in water, fish, sediment, soil, and humans. Most of these studies were motivated by concerns about Hg contamination from processing of gold ore on the southern shores. Total Hg (THg) concentrations in fish were usually below permissible World Health Organization (WHO) concentrations and international

  20. Infant and child burial rites in Roman Britain: a study from East Yorkshire

    E-print Network

    Millett, Martin; Gowland, Rebecca

    2015-04-01

    of the archaeological context of such burials. In this paper we examine the excavated evidence of two large groups of such burials from sites in East Yorkshire that demonstrate that the burial of neonatal infants followed a careful age-specific funerary rite. We suggest...

  1. Determinants of pollen dispersal in the East Asian steppe at different spatial scales

    Microsoft Academic Search

    Hongyan Liu; Fangling Wei; Kan Liu; Jiangling Zhu; Hongya Wang

    2008-01-01

    Two sites from the East Asian steppe, the Mu Us Sandland as a regional case and the Anguli Nuur catchment as a local one, were chosen to detect roles of vegetation, climate, landform, and human disturbance on pollen dispersal. 1) Vegetation: The semi-arid steppe vegetation is characterized by Artemisia and Chenopodiaceae pollen under various vegetation conditions; however, no evident correlation

  2. Seismological Studies of a Fluid Injection in Sedimentary Rocks, East Texas

    Microsoft Academic Search

    L. S. House; R. Flores

    2002-01-01

    - Induced microseismicity data from a large volume fluid injection into sedimentary rock was analyzed to study the fracture system, fluid pathways, and state of stress in the lower Frio formation in east Texas. Seismicity data are from two arrays of 25 3-component geophone packages sited in two monitoring boreholes. From a total of 2,894 event triggers, a subset of

  3. Spatial distribution of carbon balance in forest ecosystems across East Asia

    Microsoft Academic Search

    Ryuichi Hirata; Nobuko Saigusa; Susumu Yamamoto; Yoshikazu Ohtani; Reiko Ide; Jun Asanuma; Minoru Gamo; Takashi Hirano; Hiroaki Kondo; Yoshiko Kosugi; Sheng-Gong Li; Yuichiro Nakai; Kentaro Takagi; Makoto Tani; Huimin Wang

    2008-01-01

    The objective of this paper is to clarify what kind of environmental factors that regulate net ecosystem production (NEP), gross primary production (GPP), and ecosystem respiration (RE) in forest ecosystems across East Asia. Study sites were widely distributed and included diverse ecosystems, such as evergreen and deciduous, coniferous and broadleaf, planted and natural forests, from subarctic to tropical zones. We

  4. 76 FR 6600 - Foreign-Trade Zone 53-Tulsa, OK; Application for Reorganization/Expansion Under Alternative Site...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-07

    ...Mitchell Street, Pryor Creek (Mayes County); Site 4 (160 acres)--Bartlesville Industrial Park, U.S. Highway 60 and Bison Road, Bartlesville (Washington County); and, Site 5 (500 acres)--Stillwater Industrial Park, located east of...

  5. The Middle East Water Collection

    NSDL National Science Digital Library

    This extremely well-researched website offers a unique perspective on the Middle East, by presenting multi- and interdisciplinary documents, books, data, journal and newspaper articles that are devoted solely to water. The Middle East Water Collection website, presented by the Oregon State University libraries, examines the very complex issues that water presents, "to provide a greater understanding of the multi-disciplinary nature of water and its interactions with politics, development, social issues, culture and religion." Additionally, the online collection is just a part of the complete 9000 item collection available at Oregon State University. Visitors can search via "Region/Country", "Basins", "Subjects", or "Full Text" by using the drop down boxes on the left hand side of the homepage. The "My Favorites" tab near the top of the page allows visitors to save any of the items to their own favorites page, simply by clicking "Add to Favorites" at the bottom of the entry they want to save. A pop-up window will display indicating the item has been saved to the visitors' page.

  6. Radiological assessment report for the Lansdowne property, 105-107 East Stratford Avenue, Lansdowne, Pennsylvania, October-December 1984

    SciTech Connect

    Wynveen, R.A.; Smith, W.H.; Sholeen, C.M.; Flynn, K.F.

    1985-09-01

    Areas with elevated levels of radioactivity were found throughout both residences, as well as on the surrounding property. Contamination was also found in the garage behind the 105 East structure. The 105 East residence had substantially more contamination than the 107 East residence, as was expected. The chimneys, particularly the rear chimney, from the 105 East residence had extensive contamination, indicating that contaminated materials may have been burned at the site. The high background radiation emanating from this residence made it difficult to establish the relatively lower levels of contamination in the 107 East residence. The property surrounding the 105 East residence was found to have substantial contamination scattered throughout, with the highest level occurring in the backyard. The soil surface contamination seemed to drop markedly (but not entirely) at the property lines. The property surrounding 107 East was found to be less contaminated, although the background radiation emanating from the adjoining area made it difficult to establish the degree of surface or near-surface contamination from surface surveys. Subsurface investigation of the soil surrounding the structure indicated that radium contamination was widespread and extended to a depth of eight feet at some locations. There was evidence that some of this contamination extended onto adjoining properties and may have been transported off the site via subsurface migration. Additionally, analysis of samples from access points in the residence sewer system effluent established that the system was contaminated. 3 refs., 26 figs., 13 tabs.

  7. Physical Property Interpretation Using Log Data from the Ulleung Basin Sediments, East Sea of Korea

    Microsoft Academic Search

    Gil Young Kim; Jang Jun Bahk; Dong Geun Yoo; Byong Jae Ryu

    2012-01-01

    This research focuses on the physical properties of a drilled site (UBGH1-4) in the Ulleung Basin, East Sea of Korea. Based on seismic profile and core\\/log data, the upper 50 m sediments of the drilled site are dominated by turbidite\\/hemipelagic sediments, whereas the sediments below the depth are characterized by thick debris-flow deposits. The physical properties data (velocity, density, porosity, resistivity,

  8. Ghost Sites

    NSDL National Science Digital Library

    There is much on the Net that is living and vibrant, but there is also much that is dead, stuffed, or embalmed, as Steve Baldwin, former Pathfinder (discussed in the November 14, 1997 ScoutReport) writer likes to say. At this site Baldwin tracks notable embalmed, dead, or dying web sites. Each issue of Ghost Sites reviews five to ten such sites. Sites discussed include the latest Pathfinder out-of-date update on the Unibomber, the stillborn MecklerWeb, and Electric Minds (discussed in the November 22, 1996 Scout Report), abandoned by Howard Rheingold. Sites are rated from Dying in I.C.U. to Site is Stuffed, Embalmed and Ready for Internet Museum. Ironically, several of the sites discussed have been resurrected or metamorphosed since they were discussed, proving, if nothing else, that anything is possible in cyberspace. Note that clicking on discussed sites opens a new browser window.

  9. Variability of relative site response at Los Alamos, NM

    SciTech Connect

    House, L.; Phillips, W.S. (Los Alamos National Lab., NM (USA))

    1989-01-01

    To estimate the range of seismic response at low strain of sites within Los Alamos National Laboratory, ground motion recordings were obtained at 13 sites from nuclear tests carried out in Nevada. The sites are distributed within a 10 X 10 km area. The ground motions recorded at each site were conceptually modelled as the result of source, path, and site contributions. Because almost all of the paths are in common, the variations seen for each source can be attributed to site response. The sites were monitored in various combinations with seven nuclear tests; each site recorded only a few of the tests. Because horizontal ground motion is more important for structural engineering and was larger than the vertical, we focused on horizontal site response. The range of relative site response seen is about a factor of 5 to 6 at 1.5 Hz. Topography has a strong effect on response, with sites in canyons being a factor of 3 to 4 lower than nearby sites on mesas. Increased depth to seismic basement beneath some stations also correlates with higher relative site response. Relative site response does not obviously correlate with variation of seismic velocities in the near surface (e.g. upper few meters). 5 refs., 4 figs.

  10. The effect of crustal structure on the regional phases Pg and Lg at the Nevada test site

    Microsoft Academic Search

    B. W. Barker; Z. A. Der; C. P. Mrazek

    1981-01-01

    The effect of local strucuture on the characteristics of the regional phases Pg and Lg was investigated by analyzing events at epicentral distances less than 10° from the Nevada Test Site. The stations used are on markedly different geological structures; three on granitic intrusions, two on Pahute Mesa, a feature overlaying a buried volcanic caldera, and, finally, four on Yucca

  11. Simulating Aerosol-cloud-radiation Feedbacks Over East Asia Using WRF-Chem

    NASA Astrophysics Data System (ADS)

    Wang, J.; Allen, D. J.; Pickering, K. E.; Li, Z.

    2013-12-01

    Aerosols play an important role in climate change through their impact on the radiative balance and hydrological cycle of the atmosphere. Recently much effort has been put into studying the radiative forcing of aerosols in East Asia. In this study, we apply the regional chemistry and transport model, WRF-Chem, to study aerosol radiative forcing over eastern Asia. Four model simulations have been conducted to ascertain the direct and indirect (cloud albedo and cloud lifetime) effects of aerosols on radiation and precipitation. The time period of interest is from Feb 22, 2005 to March 31, 2005 when there were extensive measurements of radiation, trace gases, and aerosol properties available from EAST-AIRE (East Asian Study of Tropospheric Aerosols: An International Regional Experiment ). Measurements from EAST-AIRE site Xianghe, MODIS, CERES, and AERONET are used to assess the performance of the base simulation. The base run shows good agreement with observations, although the model underestimates the aerosol loading in East Asia, especially over highly polluted regions. We compare the base run with the sensitivity runs and investigate the difference in short wave radiation at the surface and the top of atmosphere, cloud properties (cloud fraction, cloud condensation nuclei, effective radius, and liquid water path), and precipitation patterns. Preliminary results indicate that short wave radiation at the surface is reduced by 28 W m-2 at Xianghe site due to the aerosol direct effect.

  12. East Carolina University Health Care Components

    E-print Network

    ;Page 1 of 5 NOTICE OF PRIVACY PRACTICES EAST CAROLINA UNIVERSITY HEALTH CARE COMPONENTS ECU PHYSICIANS Physicians (ECUP) and the other Health Care Components at East Carolina University (collectively referred services, or by calling in a prescription. Electronic Health Information Exchange Program. ECUP, and any

  13. The East Asian summer monsoon: an overview

    Microsoft Academic Search

    Ding Yihui; Johnny C. L. Chan

    2005-01-01

    Summary The present paper provides an overview of major problems of the East Asian summer monsoon. The summer monsoon system over East Asia (including the South China Sea (SCS)) cannot be just thought of as the eastward and northward extension of the Indian monsoon. Numerous studies have well documented that the huge Asian summer monsoon system can be divided into

  14. The Pastoral Neolithic of East Africa

    Microsoft Academic Search

    John Bower

    1991-01-01

    In East Africa, as in many other regions, the initial shift from hunting and gathering to food production was a secondary process involving the introduction of species domesticated elsewhere. Specifically, the East African Neolithic, or Pastoral Neolithic, centered on herding livestock, some of which may have been domesticated in the Sahara and all of which were almost certainly imported from

  15. East Carolina University Department of Public Health

    E-print Network

    East Carolina University Department of Public Health Master of Public Health: Competencies Brody School of Medicine Department of Public Health | Lakeside Annex 7 Updated: 11/20/13 #12;MPH Competencies The Master of Public Health (MPH) Program at East Carolina University expects each MPH graduate to possess

  16. East Carolina University Faculty Manual ACADEMIC FREEDOM

    E-print Network

    East Carolina University Faculty Manual PART III ACADEMIC FREEDOM The East Carolina University or her right of free speech must realize that in the minds of many people he or she occupies the 1940 Statement of Principles on Academic Freedom and Tenure by the American Association of University

  17. Cultural Foundations of Learning: East and West

    ERIC Educational Resources Information Center

    Li, Jin

    2012-01-01

    Western and East Asian people hold fundamentally different beliefs about learning that influence how they approach child rearing and education. Reviewing decades of research, Dr. Jin Li presents an important conceptual distinction between the Western mind model and the East Asian virtue model of learning. The former aims to cultivate the mind to…

  18. Active Faults and Seismic Sources of the Middle East Region: Earthquake Model of the Middle East (EMME) Project

    NASA Astrophysics Data System (ADS)

    Gulen, L.; EMME WP2 Team*

    2011-12-01

    The Earthquake Model of the Middle East (EMME) Project is a regional project of the GEM (Global Earthquake Model) project (http://www.emme-gem.org/). The EMME project covers Turkey, Georgia, Armenia, Azerbaijan, Syria, Lebanon, Jordan, Iran, Pakistan, and Afghanistan. Both EMME and SHARE projects overlap and Turkey becomes a bridge connecting the two projects. The Middle East region is tectonically and seismically very active part of the Alpine-Himalayan orogenic belt. Many major earthquakes have occurred in this region over the years causing casualties in the millions. The EMME project consists of three main modules: hazard, risk, and socio-economic modules. The EMME project uses PSHA approach for earthquake hazard and the existing source models have been revised or modified by the incorporation of newly acquired data. The most distinguishing aspect of the EMME project from the previous ones is its dynamic character. This very important characteristic is accomplished by the design of a flexible and scalable database that permits continuous update, refinement, and analysis. An up-to-date earthquake catalog of the Middle East region has been prepared and declustered by the WP1 team. EMME WP2 team has prepared a digital active fault map of the Middle East region in ArcGIS format. We have constructed a database of fault parameters for active faults that are capable of generating earthquakes above a threshold magnitude of Mw?5.5. The EMME project database includes information on the geometry and rates of movement of faults in a "Fault Section Database", which contains 36 entries for each fault section. The "Fault Section" concept has a physical significance, in that if one or more fault parameters change, a new fault section is defined along a fault zone. So far 6,991 Fault Sections have been defined and 83,402 km of faults are fully parameterized in the Middle East region. A separate "Paleo-Sites Database" includes information on the timing and amounts of fault displacement for major fault zones. A digital reference library, that includes the pdf files of relevant papers, reports and maps, is also prepared. A logic tree approach is utilized to encompass different interpretations for the areas where there is no consensus. Finally seismic source zones in the Middle East region have been delineated using all available data. *EMME Project WP2 Team: Levent Gülen, Murat Utkucu, M. Dinçer Köksal, Hilal Yalçin, Yigit Ince, Mine Demircioglu, Shota Adamia, Nino Sadradze, Aleksandre Gvencadze, Arkadi Karakhanyan, Mher Avanesyan, Tahir Mammadli, Gurban Yetirmishli, Arif Axundov, Khaled Hessami, M. Asif Khan, M. Sayab.

  19. Building Details East Broad Top Railroad & Company, Water ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Building Details - East Broad Top Railroad & Company, Water Tank at Coles Station, East Broad Top Railroad & Company (at Milepost 24.3), 0.5 miles east of Coles Valley Road, Saltillo, Huntingdon County, PA

  20. Details of the Water Spout Assembly East Broad Top ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Details of the Water Spout Assembly - East Broad Top Railroad & Company, Water Tank at Coles Station, East Broad Top Railroad & Company (at Milepost 24.3), 0.5 miles east of Coles Valley Road, Saltillo, Huntingdon County, PA