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1

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

SciTech Connect

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.

Murphy, R.W.; Domingo, N.

1982-05-01

2

Recent Changes in Ground Deformation at the East Mesa Geothermal Field, California as Measured by InSAR  

NASA Astrophysics Data System (ADS)

The East Mesa Geothermal Field in East Mesa, Imperial County, California is a series of 6 geothermal power plants with a 57MW capacity that has been in operation since 1987. Previous InSAR studies using ERS-1 and ERS-2 data (1992-2001) have observed ongoing subsidence at rates between -32 to -43 mm/yr. The observed subsidence at this site was thought to be caused by reservoir compaction since there was a negative net production of water during that time period. However, even though net production remained negative, more recent Envisat data reveal a shift in the subsidence signal towards the north and onset of relative uplift in the south portion of the geothermal field starting in 2006. We examine three datasets over East Mesa, including 57 descending ERS-1 and ERS-2 SAR images as well as 35 ascending and 48 descending Envisat SAR acquisitions, to create more than 900 interferograms over the 18 year time period (1992-2010). This dense temporal coverage is valuable for evaluating variations in deformation patterns and minimizing the contribution from the atmosphere. A modified version of the small baseline subset (SBAS) method is used to generate time series of ground displacements and average velocities. ERS data are consistent with previous studies showing rates between -30 and -40 mm/year in the line-of-sight while the Envisat time series' show line-of-sight rates of -20 mm/yr and 12 mm/yr for maximum subsidence and uplift. Net production at the East Mesa Geothermal Field is calculated using production and injection data provided by the California Department of Conservation. The average net production is estimated as -383,000 metric tons per month over the time span of Envisat data and remained negative even during the onset of relative uplift.

Taylor, H.; Pritchard, M. E.; Lohman, R. B.

2013-12-01

3

New fusulinids from Lower Permian turbidites at Conglomerate Mesa, southeastern inyo Mountains, east-central California  

USGS Publications Warehouse

Seven previously unrecognized fusulinid species from Lower Permian (Wolfcampian and Leonardian) turbidites near Conglomerate Mesa in east-central California, four of which are named as new species, are here described and figured. The four new species are Schwagerina merriami, S. wildei, Parafusulina mackevetti, and Skinnerella rossi. These fusulinid species have close affinities to similar taxa in Texas and northeastern Nevada, and they are distinct from some other faunas of slightly different age in the Conglomerate Mesa area that are dominated by endemic species and other species with Eastern Klamath Mountains affinities.

Stevens, C.H.; Stone, P.

2009-01-01

4

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

SciTech Connect

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.

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

1983-12-01

5

Response of East Mesa and Raft River Reservoirs to Injection-Backflow Testing  

SciTech Connect

Analysis of tracer recovery curves from injection-backflow testing at two geothermal reservoirs reveals large differences in response between 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.

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

1983-12-15

6

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

SciTech Connect

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.

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

2006-12-12

7

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

SciTech Connect

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.

Not Available

1981-02-01

8

Site Cleanup of East Base  

NSF Publications Database

... EAM NSF Org: OD / OPP Date : March 27, 1991 File : opp93027 DIVISION OF POLAR PROGRAMS OFFICE OF ... Assessment and Site Cleanup of East Base) To: Files (S.7 - Environment) (S.7.1 - Hazardous Wastes ...

9

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

SciTech Connect

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.

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

1997-09-01

10

New permian fusulinids from conglomerate mesa, southeastern inyo Mountains, east-central california  

USGS Publications Warehouse

In the Conglomerate Mesa area in the southeastern Inyo Mountains, east-central California, a series of distinctive fusulinid assemblages ranging in age from late Artinskian to Kungurian or Roadian was developed in units 7-10 of the sedimentary rocks of Santa Rosa Flat (part of the Owens Valley Group). The fauna of unit 7 shows some eastern Klamath Mountains affinity, but most of the species in unit 7 and the lower half of unit 8 are highly endemic and comprise three new genera with 12 new species, two unusual unassigned forms, and two other new species assigned to previously described genera. New taxa include: Crenulosepta new genus with five new species, C. inyoensis, C. delicata, C. fusiformis, C. rossi, and C. wahlmani; Nigribaccinus new genus with three new species, N. giganteus, N. elegans, and N. ? nestelli; and the new genus Inyoschwagerina with four new species, I. magnified, I. elayeri, I. elongata, and I.? linderae. Cuniculinella Skinner and Wilde, 1965, is represented by one new species, C. parva, and Skinnerella Coogan, 1960 by one new species, S.? mcallisteri. Faunas from the upper half of unit 8, unit 9, and unit 10 have a strong West Texas affinity. New species from these units are Skinnerella davydovi, S. hexagona, Parafusulina cerrogordoensis, P. complexa, P. halli, P. owensensis, and P. ubehebensis. Copyright ?? 2009, The Paleontological Society.

Stevens, C.H.; Stone, P.

2009-01-01

11

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

SciTech Connect

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.

Freiburger, R.M.

1984-09-01

12

Pollen analysis of Anasazi sites at Black Mesa, Arizona  

E-print Network

processes which affect the archaeological provenience. Interpretations of burning for the sites are conservative, since the stratigraphy was unclear for certain of the sites sampled. I have chosen the presence of burned beams, posts, roofing materials... processes which affect the archaeological provenience. Interpretations of burning for the sites are conservative, since the stratigraphy was unclear for certain of the sites sampled. I have chosen the presence of burned beams, posts, roofing materials...

Murry, Robert Earl

2012-06-07

13

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

SciTech Connect

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.

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

2006-11-03

14

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

SciTech Connect

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)

None

1982-02-01

15

Mesa VerdeMesa Verde Fire, water, pottery & architecture  

E-print Network

Mesa VerdeMesa Verde Fire, water, pottery & architecture #12;Finding sites (survey)Finding sites drinking water myxj.net #12;Mesa Verde PotteryMesa Verde Pottery · May have evolved independently in region of baskets on exterior ­ Pottery an accidental byproduct of parching trays in basketsin baskets ­ Proposed

Wolverton, Steve

16

Geology, hydrothermal petrology, stable isotope geochemistry, and fluid inclusion geothermometry of LASL geothermal test well C/T-1 (Mesa 31-1), East Mesa, Imperial Valley, California, USA  

SciTech Connect

Borehole Mesa 31-1 (LASL C/T-1) is an 1899-m (6231-ft) deep well located in the northwestern part of the East Mesa Geothermal Field. Mesa 31-1 is the first Calibration/Test Well (C/T-1) in the Los Alamos Scientific Laboratory (LASL), Geothermal Log Interpretation Program. The purpose of this study is to provide a compilation of drillhole data, drill cuttings, well lithology, and formation petrology that will serve to support the use of well LASL C/T-1 as a calibration/test well for geothermal logging. In addition, reviews of fluid chemistry, stable isotope studies, isotopic and fluid inclusion geothermometry, and the temperature log data are presented. This study provides the basic data on the geology and hydrothermal alteration of the rocks in LASL C/T-1 as background for the interpretation of wireline logs.

Miller, K.R.; Elders, W.A.

1980-08-01

17

Preliminary evaluation of materials for fluidized bed technology in geothermal wells at Raft River, Idaho, and East Mesa, California  

SciTech Connect

Corrosion tests of candidate materials for heat exchangers using liquid fluidized bed technology were conducted at the U.S. Department of Energy's geothermal wells at Raft River, Idaho, and at the Geothermal Components Test Facility (GCTF) in East Mesa, Calif. These investigations deal with moderate temperature ranges of 135 to 163 /degree/C for electrical generation and nonelectrical applications. The corrosion, erosion, and scale buildup were evaluated. The average penetration of Type 1025 carbon steel was 314 /mu/m/year. Hastelloy alloys G and C276, stainless steels Type 304L, Type 316, Type 347, and Nitronic 50 has average penetrations of less than 2/mu/m/year. 7 refs.

Dirk, W.J.; Allen, C.A.; McAtee, R.E.

1980-01-01

18

Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site  

SciTech Connect

The sorption behavior of americium (Am), plutonium (Pu), neptunium (Np), and uranium (U) in perched Rainier Mesa tunnel water was investigated. Both volcanic zeolitized tuff samples and groundwater samples were collected from Rainier Mesa, Nevada Test Site, NV for a series of batch sorption experiments. Sorption in groundwater with and without the presence of dissolved organic matter (DOM) was investigated. Am(III) and Pu(IV) are more soluble in groundwater that has high concentrations of DOM. The sorption K{sub d} for Am(III) and Pu(IV) on volcanic zeolitized tuff was up to two orders of magnitude lower in samples with high DOM (15 to 19 mg C/L) compared to samples with DOM removed (< 0.4 mg C/L) or samples with naturally low DOM (0.2 mg C/L). In contrast, Np(V) and U(VI) sorption to zeolitized tuff was much less affected by the presence of DOM. The Np(V) and U(VI) sorption Kds were low under all conditions. Importantly, the DOM was not found to significantly sorb to the zeolitized tuff during these experiment. The concentration of DOM in groundwater affects the transport behavior of actinides in the subsurface. The mobility of Am(III) and Pu(IV) is significantly higher in groundwater with elevated levels of DOM resulting in potentially enhanced transport. To accurately model the transport behavior of actinides in groundwater at Rainier Mesa, the low actinide Kd values measured in groundwater with high DOM concentrations must be incorporated in predictive transport models.

Zhao, P; Zavarin, M; Leif, R; Powell, B; Singleton, M; Lindvall, R; Kersting, A

2007-12-17

19

GIS surface effects archive of underground nuclear detonations conducted at Yucca Flat and Pahute Mesa, Nevada Test Site, Nevada  

Microsoft Academic Search

This report presents a new comprehensive, digital archive of more than 40 years of geologic surface effects maps produced at individual detonation sites throughout the Yucca Flat and Pahute Mesa nuclear testing areas of the Nevada Test Site, Nye County, Nevada. The Geographic Information System (GIS) surface effects map archive on CD-ROM (this report) comprehensively documents the surface effects of

Grasso

2001-01-01

20

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

SciTech Connect

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.

Ebel, Brian A.; Nimmo, John R.

2009-12-29

21

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

USGS Publications Warehouse

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.

Ebel, Brian A.; Nimmo, John R.

2010-01-01

22

GIS surface effects archive of underground nuclear detonations conducted at Yucca Flat and Pahute Mesa, Nevada Test Site, Nevada  

SciTech Connect

This report presents a new comprehensive, digital archive of more than 40 years of geologic surface effects maps produced at individual detonation sites throughout the Yucca Flat and Pahute Mesa nuclear testing areas of the Nevada Test Site, Nye County, Nevada. The Geographic Information System (GIS) surface effects map archive on CD-ROM (this report) comprehensively documents the surface effects of underground nuclear detonations conducted at two of the most extensively used testing areas of the Nevada Test Site. Between 1951 and 1992, numerous investigators of the U.S. Geological Survey, the Los Alamos National Laboratory, the Lawrence Livermore National Laboratory, and the Defense Threat Reduction Agency meticulously mapped the surface effects caused by underground nuclear testing. Their work documented the effects of more than seventy percent of the underground nuclear detonations conducted at Yucca Flat and all of the underground nuclear detonations conducted at Pahute Mesa.

Grasso, D.N.

2001-11-02

23

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

SciTech Connect

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.

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

2006-12-28

24

Natural Heritage Resources of the Glade Park-Pion Mesa Area Mesa County, Colorado and Grand County, Utah  

E-print Network

Natural Heritage Resources of the Glade Park-Piñon Mesa Area Mesa County, Colorado and Grand County State University Ft. Collins, Colorado #12;Introduction The Glade Park - Piñon Mesa area in Mesa County for these sites are also included in the report. Conservation sites identified in the Glade Park - Piñon Mesa area

25

Geology of the U12n. 02 (Midi Mist) drift, and postshot observations, Rainier Mesa, Area 12, Nevada Test Site  

SciTech Connect

Mining of the Ul2n.02 drift for the Midi Mist event started on December 31, 1965, in Rainier Mesa, Nevada Test Site, and was completed on December 30, 1966. The drift was mined along a bearing of S. 65/sup 0/ W. at an altitude of 1,850.2 m (6,070.2 ft) to a length of 643 m (2,109 ft). The drift lies in tunnel bed 4 and penetrates stratigraphically up the section through sub-units 4AB, 4CD, 4E, 4F, 4G, 4H, and 4J, all of Tertiary age. Two faults mapped at the surface of the mesa were identified as having cut the complex at drift level. No engineering construction or support problems greater than minor rock slabbing, ravelly ground, or water inflow along fractures were uncountered. Visual inspection showed that shot-induced effects in the rock medium at drift level extended for 237.7 m (780 ft) from the working point in the form of fractures and small shear displacements along bedding planes.

Ege, J R; Danilchik, W; Feazel, C T

1980-05-01

26

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

SciTech Connect

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.

Pawloski, G.A.

1999-09-21

27

Circular Mesa  

NASA Technical Reports Server (NTRS)

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.

2003-01-01

28

General View of Kinckley Knitting Mill site, east end of ...  

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

General View of Kinckley Knitting Mill site, east end of site along Wister Street, looking north, showing ruin of stone mill building and smoke stack of the Germantown Dyeworks in background - Hinckley Knitting Mills, 21-35 East Wister Street, Philadelphia, Philadelphia County, PA

29

The origin of elevated water levels in emplacement boreholes, Pahute Mesa, Nevada Test Site: A numerical study  

SciTech Connect

The origin of elevated water levels in emplacement boreholes at Pahute Mesa, Nevada Test Site, is uncertain. If the water is from naturally perched aquifers, then presumed ``above water table`` weapons tests may directly impact the groundwater quality. The purpose of this study is to determine the probable source of the elevated water in boreholes by comparing modeled seepage of infiltrated drilling fluids, and the seepage from a simulated naturally perched aquifer with the observed water level history. In the model, large volumes of water are infiltrated, yet return flow of fluids back into the hole stops within three days after the end of drilling and is insufficient to produce observed standing water. Return flow is limited for two reasons: (1) the volume of the saturated rock next to the borehole is small; (2) pressure head gradient direct unsaturated flow away from the borehole. Simulation of seepage from a naturally perched aquifer readily reproduces the observed water levels.

Gardner, G.G.; Brikowski, T.H.

1993-12-01

30

Candor Chasma Mesa  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site]

A mantling layer of sediment slumps off the edge of a mesa in Candor Chasma producing a ragged pattern of erosion that hints at the presence of a volatile component mixed in with the sediment.

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image information: VIS instrument. Latitude -6.7, Longitude 286.4 East (73.6 West). 19 meter/pixel resolution.

2003-01-01

31

Hangar no. 1 south and east side. Site view seen ...  

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

Hangar no. 1 south and east side. Site view seen from main runway. Note control tower building. Looking 340 NNW. - Marine Corps Air Station Tustin, Northern Lighter Than Air Ship Hangar, Meffett Avenue & Maxfield Street, Tustin, Orange County, CA

32

Value of information analysis for Corrective Action Unit Nos. 101 and 102: Central and western Pahute Mesa, Nevada Test Site, Nevada  

SciTech Connect

The purpose of this report is to describe the basis for and present the results of a value of information analysis (VOIA) for the Pahute Mesa underground test area of the Nevada Test Site (NTS), one of several areas of the Nevada Test Site used for underground nuclear testing in the past. The value of information analysis was used to evaluate and compare potential characterization options at the Pahute Mesa underground test area for site remediation purposes. Thirty six characterization options were evaluated, ranging from a single, inexpensive study using existing data and intended to address a single question or uncertainty, to a forty-million-dollar suite of activities designed to collect and analyze new information to address multiple uncertainties. The characterization options were compared and ranked based on how effective the experts though the information collection would be in reducing uncertainties, how this effected the distance to contaminant boundary, and the cost of the option.

NONE

1998-09-01

33

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

SciTech Connect

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.

Joseph M. Fenelon

2006-08-15

34

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

USGS Publications Warehouse

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.

Fenelon, Joseph M.

2006-01-01

35

Magnetotelluric Data, Rainier Mesa\\/Shoshone Mountain, Nevada Test Site, Nevada  

Microsoft Academic Search

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.;\\u000aFrom 1951 to 1992, 828 underground nuclear tests were conducted at the Nevada Test Site

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

2006-01-01

36

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

Microsoft Academic Search

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

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

2006-01-01

37

The Underground Test Area Project of the Nevada Test Site: Building Confidence in Groundwater Flow and Transport Models at Pahute Mesa Through Focused Characterization Studies  

SciTech Connect

Pahute Mesa at the Nevada Test Site contains about 8.0E+07 curies of radioactivity caused by underground nuclear testing. The Underground Test Area Subproject has entered Phase II of data acquisition, analysis, and modeling to determine the risk to receptors from radioactivity in the groundwater, establish a groundwater monitoring network, and provide regulatory closure. Evaluation of radionuclide contamination at Pahute Mesa is particularly difficult due to the complex stratigraphy and structure caused by multiple calderas in the Southwestern Nevada Volcanic Field and overprinting of Basin and Range faulting. Included in overall Phase II goals is the need to reduce the uncertainty and improve confidence in modeling results. New characterization efforts are underway, and results from the first year of a three-year well drilling plan are presented.

Pawloski, G A; Wurtz, J; Drellack, S L

2009-12-29

38

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)

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.

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

39

Analysis of fractures in volcanic cores from Pahute Mesa, Nevada Test Site  

SciTech Connect

The Nevada Test Site (NTS), located in Nye County, southern Nevada, was the location of 828 announced underground nuclear tests, conducted between 1951 and 1992. Approximately one-third of these tests were detonated near or below the water table. An unavoidable consequence of these testing activities was introducing radionuclides into the subsurface environment, impacting groundwater. Groundwater flows beneath the NTS almost exclusively through interconnected natural fractures in carbonate and volcanic rocks. Information about these fractures is necessary to determine hydrologic parameters for future Corrective Action Unit (CAU)-specific flow and transport models which will be used to support risk assessment calculations for the U.S. Department of Energy, Nevada Operations Office (DOE/NV) Underground Test Area (UGTA) remedial investigation. Fracture data are critical in reducing the uncertainty of the predictive capabilities of CAU-specific models because of their usefulness in generating hydraulic conductivity values and dispersion characteristics used in transport modeling. Specifically, fracture aperture and density (spacing) are needed to calculate the permeability anisotropy of the formations. Fracture mineralogy information is used qualitatively to evaluate diffusion and radionuclide retardation potential in transport modeling. All these data can best be collected through examination of core samples.

Drellack, S.L. Jr.; Prothro, L.B.; Roberson, K.E. [and others

1997-09-01

40

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

41

Site overview. View of east side of hangar no. 2 ...  

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

Site overview. View of east side of hangar no. 2 at left and hangar no. 1 at rear. Seen from south edge of base near Warner Avenue and Jamboree Road. Looking 310 NW. - Marine Corps Air Station Tustin, Northern Lighter Than Air Ship Hangar, Meffett Avenue & Maxfield Street, Tustin, Orange County, CA

42

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/ÃÂstekonomiska 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.

43

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)

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.

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

44

Soils and geomorphology of the East Chestnut Ridge site  

SciTech Connect

Soil mapping of the East Chestnut Ridge site in conjunction with subsurface soil and rock coring provides an in-depth evaluation of the site and its suitability for disposal of wastes. Landforms and surface and subsurface hydrology, the natural, undisturbed, soil-saprolite-geohydrology system beneath the zone of engineering modifications provides for the ultimate containment of wastes and a means for the filtration and purification of any leachate before it reaches the aquifer. The surface location and extent of each geologic formation on the site were mapped. These locations correlated well with projections of subsurface contacts to the surface even through the criteria used by the pedologist and geologist to identify soil and rock from the same formation may be different. Soil thickness over bedrock of the Copper Ridge, Chepultepec, Longview, and Kingsport Formations is sufficient to provide considerable buffering between trench bottoms and groundwater or rock. Soil thickness over the Mascot Formation is comparatively thin, and pinnacles and ledges exposed on steeper sideslopes are common. Soil underlain by the Mascot Formation is not suited for a trench landfill. According to soil coring and active borrow pit observations, chert beds in the soil and saprolite are preferred zones of water flow. Construction of adequate clay liners beneath disposal units sited on the Longview dolomite may require placement and compaction of other native soils to achieve sufficiently low soil permeabilities. Karst geomorphic processes that initiated the formation of dolines evidently started several million years ago. Doline formation and enlargement is episodic, with short periods of activity followed by long periods of stability. Analysis of doline soil stratigraphy suggests that most of the large dolines on the site have been stable for most of the past 10,000 to 1000,000 years. 8 refs., 9 figs.

Lietzke, D.A.; Ketelle, R.H.; Lee, R.R. (Lietzke (D.A.), Rutledge, TN (USA); Oak Ridge National Lab., TN (USA))

1989-10-01

45

Remedial actions at the former Climax Uranium Company, Uranium Mill site, Grand Junction, Mesa County, Colorado. Volume 1, Text: Final environmental impact statement  

SciTech Connect

This statement evaluates and compares the environmental impacts associated with the remedial actions of the residual radioactive materials remaining at the inactive uranium processing site and associated vicinity properties at Grand Junction, Mesa County, Colorado. This statement is also intended to aid the BLM in amending their management framework plans and final resource management plan, as well as assisting in compliance with the withdrawal application as appropriate. The site is a 114-acre tract of private and state owned land which contains approximately 3.1 million cubic yards of tailings and associated contaminated soils. The vicinity properties are homes, businesses, public buildings, and vacant lots which may have been contaminated during construction by the use of tailings as building material. An estimated 3465 vicinity properties would be cleaned up during remedial action of the tailings pile. The tailings were produced by the former Climax Uranium Company which processed uranium ore, which it sold to the US Atomic Energy Commission from 1951 to 1966 and to private sources from 1966 to 1970. This statement evaluates six alternatives for stabilization and disposal of the tailings and other contaminated materials: (1) No action. (2) Stabilization at the Grand Junction site. (3) Disposal at the Cheney Reservoir site with truck transport. (4) Disposal at the Cheney Reservoir site with train and truck transport. (5) Disposal at the Two Road site with truck transport. (6) Disposal at the Two Road site with train and truck transport. All of the alternatives except no action include remedial action at an estimated 3465 vicinity properties. Alternative 3 is DOE`s preferred alternative.

None

1986-12-01

46

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

SciTech Connect

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.

Zhao, P; Zavarin, M

2008-06-04

47

Estimation of Unsaturated Zone Traveltimes for Rainier Mesa and Shoshone Mountain, Nevada Test Site, Nevada, Using a Source-Responsive Preferential-Flow Model  

USGS Publications Warehouse

Traveltimes for contaminant transport by water from a point in the unsaturated zone to the saturated zone are a concern at Rainier Mesa and Shoshone Mountain in the Nevada Test Site, Nevada. Where nuclear tests were conducted in the unsaturated zone, contaminants must traverse hundreds of meters of variably saturated rock before they enter the saturated zone in the carbonate rock, where the regional groundwater system has the potential to carry them substantial distances to a location of concern. The unsaturated-zone portion of the contaminant transport path may cause a significant delay, in addition to the time required to travel within the saturated zone, and thus may be important in the overall evaluation of the potential hazard from contamination. Downward contaminant transport through the unsaturated zone occurs through various processes and pathways; this can lead to a broad distribution of contaminant traveltimes, including exceedingly slow and unexpectedly fast extremes. Though the bulk of mobile contaminant arrives between the time-scale end members, the fastest contaminant transport speed, in other words the speed determined by the combination of possible processes and pathways that would bring a measureable quantity of contaminant to the aquifer in the shortest time, carries particular regulatory significance because of its relevance in formulating the most conservative hazard-prevention scenarios. Unsaturated-zone flow is usually modeled as a diffusive process responding to gravity and pressure gradients as mediated by the unsaturated hydraulic properties of the materials traversed. The mathematical formulation of the diffuse-flow concept is known as Richards' equation, which when coupled to a solute transport equation, such as the advection-dispersion equation, provides a framework to simulate contaminant migration in the unsaturated zone. In recent decades awareness has increased that much fluid flow and contaminant transport within the unsaturated zone takes place as preferential flow, faster than would be predicted by the coupled Richards' and advection-dispersion equations with hydraulic properties estimated by traditional means. At present the hydrologic community has not achieved consensus as to whether a modification of Richards' equation, or a fundamentally different formulation, would best quantify preferential flow. Where the fastest contaminant transport speed is what needs to be estimated, there is the possibility of simplification of the evaluation process. One way of doing so is by a two-step process in which the first step is to evaluate whether significant preferential flow and solute transport is possible for the media and conditions of concern. The second step is to carry out (a) a basic Richards' and advection-dispersion equation analysis if it is concluded that preferential flow is not possible or (b) an analysis that considers only the fastest possible preferential-flow processes, if preferential flow is possible. For the preferential-flow situation, a recently published model describable as a Source-Responsive Preferential-Flow (SRPF) model is an easily applied option. This report documents the application of this two-step process to flow through the thick unsaturated zones of Rainier Mesa and Shoshone Mountain in the Nevada Test Site. Application of the SRPF model involves distinguishing between continuous and intermittent water supply to preferential flow paths. At Rainier Mesa and Shoshone Mountain this issue is complicated by the fact that contaminant travel begins at a location deep in the subsurface, where there may be perched water that may or may not act like a continuous supply, depending on such features as the connectedness of fractures and the nature of impeding layers. We have treated this situation by hypothesizing both continuous and intermittent scenarios for contaminant transport to the carbonate aquifer and reporting estimation of the fastest speed for both of th

Ebel, Brian A.; Nimmo, John R.

2009-01-01

48

Estimation of unsaturated zone traveltimes for Rainier Mesa and Shoshone Mountain, Nevada Test Site, Nevada, using a source-responsive preferential-flow model  

SciTech Connect

Traveltimes for contaminant transport by water from a point in the unsaturated zone to the saturated zone are a concern at Rainier Mesa and Shoshone Mountain in the Nevada Test Site, Nevada. Where nuclear tests were conducted in the unsaturated zone, contaminants must traverse hundreds of meters of variably saturated rock before they enter the saturated zone in the carbonate rock, where the regional groundwater system has the potential to carry them substantial distances to a location of concern. The unsaturated-zone portion of the contaminant transport path may cause a significant delay, in addition to the time required to travel within the saturated zone, and thus may be important in the overall evaluation of the potential hazard from contamination. Downward contaminant transport through the unsaturated zone occurs through various processes and pathways; this can lead to a broad distribution of contaminant traveltimes, including exceedingly slow and unexpectedly fast extremes. Though the bulk of mobile contaminant arrives between the time-scale end members, the fastest contaminant transport speed, in other words the speed determined by the combination of possible processes and pathways that would bring a measureable quantity of contaminant to the aquifer in the shortest time, carries particular regulatory significance because of its relevance in formulating the most conservative hazard-prevention scenarios. Unsaturated-zone flow is usually modeled as a diffusive process responding to gravity and pressure gradients as mediated by the unsaturated hydraulic properties of the materials traversed. The mathematical formulation of the diffuse-flow concept is known as Richards' equation, which when coupled to a solute transport equation, such as the advection-dispersion equation, provides a framework to simulate contaminant migration in the unsaturated zone. In recent decades awareness has increased that much fluid flow and contaminant transport within the unsaturated zone takes place as preferential flow, faster than would be predicted by the coupled Richards' and advection-dispersion equations with hydraulic properties estimated by traditional means. At present the hydrologic community has not achieved consensus as to whether a modification of Richards' equation, or a fundamentally different formulation, would best quantify preferential flow. Where the fastest contaminant transport speed is what needs to be estimated, there is the possibility of simplification of the evaluation process. One way of doing so is by a two-step process in which the first step is to evaluate whether significant preferential flow and solute transport is possible for the media and conditions of concern. The second step is to carry out (a) a basic Richards' and advection-dispersion equation analysis if it is concluded that preferential flow is not possible or (b) an analysis that considers only the fastest possible preferential-flow processes, if preferential flow is possible. For the preferential-flow situation, a recently published model describable as a Source-Responsive Preferential-Flow (SRPF) model is an easily applied option. This report documents the application of this two-step process to flow through the thick unsaturated zones of Rainier Mesa and Shoshone Mountain in the Nevada Test Site. Application of the SRPF model involves distinguishing between continuous and intermittent water supply to preferential flow paths. At Rainier Mesa and Shoshone Mountain this issue is complicated by the fact that contaminant travel begins at a location deep in the subsurface, where there may be perched water that may or may not act like a continuous supply, depending on such features as the connectedness of fractures and the nature of impeding layers. We have treated this situation by hypothesizing both continuous and intermittent scenarios for contaminant transport to the carbonate aquifer and reporting estimation of the fastest speed for both of these end members.

Brian A. Ebel; John R. Nimmo

2009-09-11

49

Fire on the mesa: Archaeological investigations at the U19an borrow pit on the Nevada Test Site  

SciTech Connect

In 1984, the Desert Research Institute conducted an archaeological reconnaissance of a proposed borrow pit area known as U19an(bp) on the Nevada Test Site for the Department of Energy, Nevada Field Office. During this reconnaissance, four National Register quality archaeological sites were discovered and recorded as lithic scatter sites 26NY4201-4204. The DRI proposed that these sites should be avoided, or investigated if avoidance was not feasible. Analysis of the surface assemblages from U19an(bp) indicates that this area was used repeatedly over the past several thousand years for domestic activities, resource processing, and hunting. Dispersed lithic reduction stations are also scattered across the area. This report presents findings relevant to several issues that have not been considered in detail in previous archaeological studies of the NTS. Notably, a detailed discussion of the lithic reduction system utilized in the production of chalcedony bifaces is presented. In addition, the role of thermal alteration in local lithic technology is considered and the evidence for thermally fractured artifacts is investigated. The data recovered from U19an(bp) indicate that fire may have played a significant role in local site formation.

Amick, D.S.

1992-12-01

50

76 FR 30152 - East Calloway County Middle School Mercury Spill Site, Murray, Calloway County, KY; Notice of...  

Federal Register 2010, 2011, 2012, 2013

...FRL-9310-4] East Calloway County Middle School Mercury Spill Site, Murray, Calloway County...the East Calloway County Middle School Mercury Spill Site located in Murray, Calloway...County [[Page 30153

2011-05-24

51

US Geological Survey investigations in the U12n. 03 drift, Rainier Mesa, Area 12, Nevada Test Site, Nevada  

Microsoft Academic Search

The U12n.03 drift was designed for a nuclear test site and mining was started on April 18, 1966, and completed May 22, 1967. The drift was driven along a bearing of N. 26° W. at an elevation of 1849.2 m (6067 ft) to a total length of 660.2 m (2166 ft). The drift lies entirely within tunnel bed 4 of

J. R. Ege; R. D. Carroll; J. E. Magner; D. R. Cunningham

1980-01-01

52

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

SciTech Connect

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.

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

2008-06-24

53

MESA Individual Academic Plan 1 MESA Individual Academic Plan  

E-print Network

of Honor or Award Academic Other mo./yr. Extracurricular Activities (school activities, clubs and sportsMESA Individual Academic Plan 1 MESA Individual Academic Plan Student Name: School: GPA for both) Course: Course: Course: #12;MESA Individual Academic Plan 2 Student Name: School: Community

Wang, Hai

54

The MESA accelerator  

NASA Astrophysics Data System (ADS)

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.

Aulenbacher, Kurt

2013-11-01

55

Surficial Geologic Map of Mesa Verde National Park, Montezuma County, Colorado  

USGS Publications Warehouse

Mesa Verde National Park in southwestern Colorado was established in 1906 to preserve and protect the artifacts and dwelling sites, including the famous cliff dwellings, of the Ancestral Puebloan people who lived in the area from about A.D. 550 to A.D. 1300. In 1978, the United Nations designated the park as a World Heritage Site. The geology of the park played a key role in the lives of these ancient people. For example, the numerous (approximately 600) cliff dwellings are closely associated with the Cliff House Sandstone of Late Cretaceous age, which weathers to form deep alcoves. In addition, the ancient people farmed the thick, red loess (wind-blown dust) deposits on the mesa tops, which because of its particle size distribution has good moisture retention properties. The soil in this loess cover and the seasonal rains allowed these people to grow their crops (corn, beans, and squash) on the broad mesa tops. Today, geology is still an important concern in the Mesa Verde area because the landscape is susceptible to various forms of mass movement (landslides, debris flows, rockfalls), swelling soils, and flash floods that affect the park's archeological sites and its infrastructure (roads, septic systems, utilities, and building sites). The map, which encompasses an area of about 100 mi2 (260 km2), includes all of Mesa Verde National Park, a small part of the Ute Mountain Indian Reservation that borders the park on its southern and western sides, and some Bureau of Land Management and privately owned land to the north and east. Surficial deposits depicted on the map include: artificial fills, alluvium of small ephemeral streams, alluvium deposited by the Mancos River, residual gravel on high mesas, a combination of alluvial and colluvial deposits, fan deposits, colluvial deposits derived from the Menefee Formation, colluvial deposits derived from the Mancos Shale, rockfall deposits, debris flow deposits, earthflow deposits, translational and rotational landslide deposits, rock rubble deposits, and loess. Bedrock units depicted on the map include the Cliff House Sandstone, Menefee Formation, Point Lookout Sandstone, and Mancos Shale all of Late Cretaceous age. In addition, minette dikes, of Oligocene age, found at several locations in the park are depicted on the map. Descriptions, including associated hazards and resources as used by the Ancestral Puebloans, are given for all map units.

Carrara, Paul E.

2012-01-01

56

Mystery of the Mesa: A Science Detective Story.  

ERIC Educational Resources Information Center

Explains how archaeologists who found the "Mesa Site" in Northern Alaska used evidence to make interpretations about America's earliest settlers. Includes related science activities and a color poster. (PR)

Brook, Richard; Tisdale, Mary

1993-01-01

57

Research into the stability of restored opencast coal mine sites in the north east of England  

Microsoft Academic Search

The paper presents an analysis of backfill settlement observations conducted at a number of opencast mine sites in the North-East of England. The work is aimed at developing a better understanding of the stability of the restored mine backfills from the point of view of structural development. The project is specifically concerned with the effect on fill movements of the

R. N. Singh; S. M. Reed; D. B. Hughes

1987-01-01

58

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

SciTech Connect

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.

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

1996-09-01

59

Hydrogeologic setting east of a low-level radioactive-waste disposal site near Sheffield, Illinois  

USGS Publications Warehouse

Core samples from 45 test wells and 4 borings were used to describe the glacial geology of the area east of the low-level radioactive-waste disposal site near Sheffield, Bureau County, Illinois. Previous work has shown that shallow ground water beneath the disposal site flows east through a pebbly-sand unit of the Toulon Member of the Glasford Formation. The pebbly sand was found in core samples from wells in an area extending northeast from the waste-disposal site to a strip-mine lake and east along the south side of the lake. Other stratigraphic units identified in the study area are correlated with units found on the disposal site. The pebbly-sand unit of the Toulon Member grades from a pebbly sand on site into a coarse gravel with sand and pebbles towards the lake. The Hulick Till Member, a key bed, underlies the Toulon Member throughout most of the study area. A narrow channel-like depression in the Hulick Till is filled with coarse gravelly sand of the Toulon Member. The filled depression extends eastward from near the northeast corner of the waste-disposal site to the strip-mine lake. (USGS)

Foster, J. B.; Garklavs, George; Mackey, G. W.

1984-01-01

60

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.  

SciTech Connect

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.

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

2006-09-21

61

Modeling Approach/Strategy for Corrective Action Unit 99: Rainier Mesa and Shoshone Mountain, Nevada Test Site, Nye County, Nevada, Revision 1, with ROTC-1  

SciTech Connect

This document describes an approach for preliminary (Phase I) flow and transport modeling for the Rainier Mesa/Shoshone Mountain (RMSM) Corrective Action Unit (CAU). This modeling will take place before the planned Phase II round of data collection to better identify the remaining data gaps before the fieldwork begins. Because of the geologic complexity, limited number of borings, and large vertical gradients, there is considerable uncertainty in the conceptual model for flow; thus different conceptual models will be evaluated, in addition to different framework and recharge models. The transport simulations will not be used to formally calculate the Contaminant Boundary at this time. The modeling (Phase II) will occur only after the available data are considered sufficient in scope and quality.

Greg Ruskauff

2008-06-01

62

Emissions of black carbon in East Asia estimated from observations at a remote site in the East China Sea  

NASA Astrophysics Data System (ADS)

East Asia, including China, is the largest source of anthropogenic black carbon (BC). In estimating the BC emissions from this region, it is advantageous to use BC mass concentrations measured at remote locations on the ocean appropriately distant from the large sources because of spatially uniform distributions through mixing during transport. We made continuous measurements of the BC mass concentration with an accuracy of about 10% at Cape Hedo on Okinawa Island, Japan, in the East China Sea, from February 2008 to May 2009, simultaneously with carbon monoxide (CO). The seasonal median BC concentrations at Hedo were highest (0.23-0.31 ?g m-3 at standard temperature and pressure) in winter and spring when plumes from China, predominantly northern China north of 33°N, were often transported to the site. A three-dimensional chemical transport model is used to calculate the mass concentration of BC using the annual mean emission inventory of Zhang et al. (2009) for the base year 2006. The model results and the observed BC-CO correlation are used to exclude the BC data substantially influenced by wet deposition. The calculated BC mass concentrations agree with those observed to within about 30% in air strongly affected by emissions in China for winter and spring on average. We estimate the annually averaged BC emission flux over the whole of China to be 1.92 Tg yr-1 with an uncertainty of about 40%. This value is very close to the value of 1.81 Tg yr-1 estimated by Zhang et al. (2009). The overall uncertainty of 40% of the present estimate is a substantial improvement in the uncertainty (208%) of the bottom-up inventory.

Kondo, Y.; Oshima, N.; Kajino, M.; Mikami, R.; Moteki, N.; Takegawa, N.; Verma, R. L.; Kajii, Y.; Kato, S.; Takami, A.

2011-08-01

63

Snow precipitation at four ice core sites in East Antarctica: provenance, seasonality and blocking factors  

Microsoft Academic Search

Snow precipitation is the primary mass input to the Antarctic ice sheet and is one of the most direct climatic indicators,\\u000a with important implications for paleoclimatic reconstruction from ice cores. Provenance of precipitation and the dynamic conditions\\u000a that force these precipitation events at four deep ice core sites (Dome C, Law Dome, Talos Dome, and Taylor Dome) in East\\u000a Antarctica

Claudio Scarchilli; Massimo Frezzotti; Paolo Michele Ruti

64

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA)  

SciTech Connect

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, robust, efficient, thread-safe libraries for a wide range of applications in computational stellar astrophysics. A one-dimensional stellar evolution module, MESAstar, 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. MESAstar 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. State-of-the-art modules provide equation of state, opacity, nuclear reaction rates, element diffusion data, and atmosphere boundary conditions. Each module is constructed as a separate Fortran 95 library with its own explicitly defined public interface to facilitate independent development. Several detailed examples indicate the extensive verification and testing that is continuously performed and demonstrate the wide range of capabilities that MESA possesses. These examples include evolutionary tracks of very low mass stars, brown dwarfs, and gas giant planets to very old ages; the complete evolutionary track of a 1 M {sub sun} star from the pre-main sequence (PMS) to a cooling white dwarf; the solar sound speed profile; the evolution of intermediate-mass stars through the He-core burning phase and thermal pulses on the He-shell burning asymptotic giant branch phase; the interior structure of slowly pulsating B Stars and Beta Cepheids; the complete evolutionary tracks of massive stars from the PMS to the onset of core collapse; mass transfer from stars undergoing Roche lobe overflow; and the evolution of helium accretion onto a neutron star. MESA can be downloaded from the project Web site (http://mesa.sourceforge.net/).

Paxton, Bill; Bildsten, Lars [Kavli Institute for Theoretical Physics and Department of Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States); Dotter, Aaron; Herwig, Falk [Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, STN CSC, Victoria, BC V8W 3P6 (Canada); Lesaffre, Pierre [LERMA-LRA, CNRS UMR8112, Observatoire de Paris and Ecole Normale Superieure, 24 Rue Lhomond, 75231 Paris Cedex 05 (France); Timmes, Frank [School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287-1404 (United States)

2011-01-15

65

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

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.

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

2011-01-01

66

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

E-print Network

TR- 117 1981 Assessment of Stormflow and Water Quality from Undisturbed and Site Prepared Forest Land in East Texas, Interim Report M.G. DeHaven W.H. Blackburn R.W. Knight A.T. Weichert...TR- 117 1981 Assessment of Stormflow and Water Quality from Undisturbed and Site Prepared Forest Land in East Texas, Interim Report M.G. DeHaven W.H. Blackburn R.W. Knight A.T. Weichert...

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

67

Seismic design spectra 200 West and East Areas DOE Hanford Site, Washington  

SciTech Connect

This document presents equal hazard response spectra for the W236A project for the 200 East and West new high-level waste tanks. The hazard level is based upon WHC-SD-W236A-TI-002, Probabilistic Seismic Hazard Analysis, DOE Hanford Site, Washington. Spectral acceleration amplification is plotted with frequency (Hz) for horizontal and vertical motion and attached to this report. The vertical amplification is based upon the preliminary draft revision of Standard ASCE 4-86. The vertical spectral acceleration is equal to the horizontal at frequencies above 3.3Hz because of near-field, less than 15 km, sources.

Tallman, A.M.

1995-12-31

68

Potential long-term chemical effects of diesel fuel emissions on a mining environment: A preliminary assessment based on data from a deep subsurface tunnel at Rainer Mesa, Nevada test site  

SciTech Connect

The general purpose of the Yucca Mountain Site Characterization Project (YMSCP) Introduced Materials Task is to understand and predict potential long-term modifications of natural water chemistry related to the construction and operation of a radioactive waste repository that may significantly affect performance of the waste packages. The present study focuses on diesel exhaust. Although chemical information on diesel exhaust exists in the literature, it is either not explicit or incomplete, and none of it establishes mechanisms that might be used to predict long-term behavior. In addition, the data regarding microbially mediated chemical reactions are not well correlated with the abiotic chemical data. To obtain some of the required long-term information, we chose a historical analog: the U12n tunnel at Rainier Mesa, Nevada Test Site. This choice was based on the tunnel`s extended (30-year) history of diesel usage, its geological similarity to Yucca Mountain, and its availability. The sample site within the tunnel was chosen based on visual inspection and on information gathered from miners who were present during tunnel operations. The thick layer of dark deposit at that site was assumed to consist primarily of rock powder and diesel exhaust. Surface samples and core samples were collected with an intent to analyze the deposit and to measure potential migration of chemical components into the rock. X-ray diffraction (XRD), x-ray fluorescence (XRF), scanning electron microscopy (SEM) with energy dispersive spectra (EDS) analysis, secondary-ion mass spectrometry (SIMS), and Fourier transform infrared (FTIR) analysis were used to measure both spatial distribution and concentration for the wide variety of chemical components that were expected based on our literature survey.

Meike, A.; Bourcier, W.L.; Alai, M. [and others

1995-09-01

69

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

NSDL National Science Digital Library

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.

Studio, Nasa/goddard S.; Nasa

70

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

SciTech Connect

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.

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

1993-05-01

71

Red Sky with Red Mesa  

ScienceCinema

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.

None

2014-06-23

72

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

Microsoft Academic Search

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

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

73

Forming an East Asian Community: A site for Japan–China power struggles  

Microsoft Academic Search

With China emerging as a great economic power in East Asia, the nations in the region have a compelling interest in the formation of an East Asian Community. The regional organization ASEAN Plus Three (APT) was established in 1997 and serves as a lynchpin institution in the formation of this larger East Asian Community. APT comprises the 10 member nations

Takashi Terada

2006-01-01

74

Quantifying the Role of Cloud Water in the Hydrology of Two Montane Forest Sites on East Maui, Hawaii  

Microsoft Academic Search

East Maui (Haleakala volcano) rises 3054 m above the ocean, and clouds intercepting the mountain slopes are an integral part of the climate. To what extent do the trees and shrubs on the mountainsides extract cloud water that contributes to soil moisture, groundwater recharge, and stream flow in the watersheds? Two sites, on the windward and leeward sides of the

M. A. Scholl; S. B. Gingerich; T. W. Giambelluca; M. A. Nullet; L. L. Loope

2003-01-01

75

Assessment of biological remains from excavations at the site of the proposed waste water treatment works at Melton, East Riding of Yorkshire (site code: MTW02)  

Microsoft Academic Search

Summary Forty-four sediment samples and a small quantity of hand-collected bone, recovered from excavations of deposits of later Iron Age to Roman date at the site of the proposed waste water treatment works at Melton, East Riding of Yorkshire, were submitted to PRS for an evaluation of their bioarchaeological potential. Charred plant material, other than charcoal, was limited to very

Allan Hall; Harry Kenward; Deborah Jaques; Kathryn Johnson; John Carrott

2002-01-01

76

Phase I Hydrologic Data for the Groundwater Flow and Contaminant Transport Model of Corrective Action Unit 99: Rainier Mesa/Shoshone Mountain, Nevada Test Site, Nye County, Nevada, Revision 1  

SciTech Connect

This document presents a summary and framework of the available hydrologic data and other information directly relevant to the development of the Rainier Mesa/Shoshone Mountain (RMSM) Corrective Action Unit (CAU) 99 groundwater flow models. Where appropriate, data and information documented elsewhere are briefly summarized with reference to the complete documentation.

Nathan Bryant

2008-05-01

77

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

Microsoft Academic Search

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

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

2009-01-01

78

Snow precipitation at four ice core sites in East Antarctica: provenance, seasonality and blocking factors  

NASA Astrophysics Data System (ADS)

Snow precipitation is the primary mass input to the Antarctic ice sheet and is one of the most direct climatic indicators, with important implications for paleoclimatic reconstruction from ice cores. Provenance of precipitation and the dynamic conditions that force these precipitation events at four deep ice core sites (Dome C, Law Dome, Talos Dome, and Taylor Dome) in East Antarctica were analysed with air mass back trajectories calculated using the Lagrangian model and the mean composite data for precipitation, geopotential height and wind speed field data from the European Centre for Medium Range Weather Forecast from 1980 to 2001. On an annual basis, back trajectories showed that the Atlantic-Indian and Ross-Pacific Oceans were the main provenances of precipitation in Wilkes Land (80%) and Victoria Land (40%), respectively, whereas the greatest influence of the ice sheet was on the interior near the Vostok site (80%) and in the Southwest Ross Sea (50%), an effect that decreased towards the coast and along the Antarctic slope. Victoria Land received snowfall atypically with respect to other Antarctica areas in terms of pathway (eastern instead of western), seasonality (summer instead of winter) and velocity (old air age). Geopotential height patterns at 500 hPa at low (>10 days) and high (2-6 days) frequencies during snowfall cycles at two core sites showed large positive anomalies at low frequencies developing in the Tasman Sea-Eastern Indian Ocean at higher latitudes (60-70°S) than normal. This could be considered part of an atmospheric blocking event, with transient eddies acting to decelerate westerlies in a split region area and accelerate the flow on the flanks of the low-frequency positive anomalies.

Scarchilli, Claudio; Frezzotti, Massimo; Ruti, Paolo Michele

2011-11-01

79

Three-dimensional crust and upper mantle structure at the Nevada Test Site  

NASA Astrophysics Data System (ADS)

The three-dimensional crust and upper mantle structure at the Nevada Test Site (NTS) is derived by combining teleseismic P wave travel time residuals with Pn source time terms. The NTS time terms and relative teleseismic residuals are calculated by treating the explosions as a network of `receivers' which record `shots' located at the surrounding stations. Utilization of the Pn time terms allows for better crustal resolution than is possible from teleseismic information alone. Average relative teleseismic P wave residuals show a consistent progression of positive (late arrivals) to negative residuals from east to west across the NTS. However, Pn time terms beneath Rainier Mesa are at least 0.3 and 0.5 s less than those beneath Pahute Mesa and Yucca Flat, respectively, indicating the presence of high-velocity crustal material or crustal thinning beneath Rainier Mesa. The time terms at Pahute Mesa are surprisingly uniform, and the largest time terms and residuals are observed in the northwest and southern parts of Yucca Flat. The Pn time terms show a slight correlation with the working-point velocity at the shot point for Pahute Mesa and Yucca Flat, indicating that part of the observed lateral variations are caused by shallow effects of the upper crust. Three-dimensional inversion of the travel time residuals suggests that Yucca Flat is characterized by low-velocity anomalies confined to the upper crust, Rainer Mesa by very high velocities in the upper and middle crust, and Pahute Mesa by a high-velocity anomaly extending through the crust and into the upper mantle. Relatively low velocities are observed in the lower crust beneath the Timber Mountain caldera south of Pahute Mesa with no expression in the upper mantle. These observed differences in velocity beneath the Tertiary Silent Canyon and Timber Mountain calderas may be related to their magma volume and mode of enrichment from a mantle-derived magma source.

Taylor, Steven R.

1983-03-01

80

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Questionnaires  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume 6). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 7, provides the questionnaires used from the beginning of the study.

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

1989-01-01

81

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

NASA Astrophysics Data System (ADS)

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.

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

2004-12-01

82

Powerhouse east, north and west elevations and operating machinery, ...  

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

Powerhouse - east, north and west elevations and operating machinery, battery storage building, and typical span of steel service bridge - Grand Valley Diversion Dam, Half a mile north of intersection of I-70 & Colorado State Route 65, Cameo, Mesa County, CO

83

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

NASA Astrophysics Data System (ADS)

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.

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

2004-12-01

84

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

SciTech Connect

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.

NSTec Environmental Management

2011-04-30

85

Mars EVA Suit Airlock (MESA)  

NASA Astrophysics Data System (ADS)

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.

Ransom, Stephen; Böttcher, Jörg; Steinsiek, Frank

86

In situ measurements of trace gases and aerosol optical properties at a rural site in northern China during East Asian Study of  

E-print Network

China during East Asian Study of Tropospheric Aerosols: An International Regional Experiment 2005 Can Li gases and aerosol optical properties at a rural site in northern China during East Asian Study the experiment, as cold fronts passing over the region drastically reduced the ground-level pollution. Very

Stehr, Jeffrey

87

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Regional comparison between sites, site effects, general discussion, and conclusions  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume VI). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. 5 refs., 66 figs.

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

1989-01-01

88

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

SciTech Connect

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.

NA

1999-06-08

89

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

SciTech Connect

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.

NSTec Environmental Management

2011-05-31

90

A reconnaissance investigation of hydrogeochemistry and hydrology of Rainier Mesa  

SciTech Connect

Rainier Mesa, in the northern part of the Nevada Test Site, provides a unique opportunity to study unsaturated flow in volcanic tuffs. This was accomplished by sampling soil waters on the mesa top and comparing them with waters in tunnels 200 to 350 meters below the surface. Discharge measurements were also made in the tunnels. The sampling was undertaken as a function of time over approximately a six month period in 1980. Analyses demonstrate the effects of evaporation and soil mineral dissolution on the concentration ratio of cations to silica. The residence time of Rainier Mesa waters was estimated in two ways. The first used a long-term trend in the cation to silica ratio observed in the tunnels which showed a maximum in June which might correspond to recharge of waters six weeks to three months prior. Groundwater seepage rates into the tunnels was the second method. Increased tunnel discharge was observed between three and six months after the estimated recharge event. Both methods indicate relatively short water residence times.

Jacobson, R.L.; Henne, M.S.; Hess, J.W.

1986-06-01

91

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

SciTech Connect

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.

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

2000-04-20

92

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

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.

Bauch, Nancy J.; Malick, Matt

2003-01-01

93

Injector linac for the MESA facility  

NASA Astrophysics Data System (ADS)

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.

Heine, R.

2013-11-01

94

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

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

Simon Valle; Luigi Boitani

2012-01-01

95

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

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.

Phillips, J.S.

1991-12-01

96

[Influence of atmospheric transport on air pollutant levels at a mountain background site of East China].  

PubMed

Transport characteristics of air pollutants transported to the background atmosphere of East China were investigated using HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory) 4.8 model driven by NCEP reanalysis data during June 2011 to May 2012. Based on the air pollutants monitoring data collected at the National atmospheric background monitoring station (Wuyishan station) in Fujian Province, characteristics of different clustered air masses as well as the origins of highly polluted air masses were further examined. The results showed that 65% of all the trajectories, in which air masses mainly passed over highly polluted area of East China, Jiangxi province and upper air in desert areas of Northwest China, carried polluted air to the station, while the rest of trajectories (35%) with air masses originated from ocean could effectively remove air pollutants at the Wuyishan station. However, the impact on the air pollutants for each air mass group varied with seasons. Elevated SO2 concentrations observed at the background station were mainly influenced by coal burning activities in Northern China during heating season. The high CO concentrations were likely associated with the pollutants emission in the process of coal production and consumption in Anhui province. The elevated NO(x), O3, PM10 and PM2.5 concentrations were mostly impacted by East China with high levels of air pollutants. PMID:25338354

Su, Bin-Bin; Xu, Ju-Yang; Zhang, Ruo-Yu; Ji, Xian-Xin

2014-08-01

97

Geology of the Rainier Mesa-Aqueduct Mesa tunnel areas: U12n tunnel  

SciTech Connect

The U12n tunnel area is located beneath Rainier Mesa on the Nevada Test Site, Nye County, Nevada. Stratigraphic units in the U12n area include Precambrian and Cambrian quartzite, Ordovician to Devonian dolomite and limestone, Cretaceous quartz monzonite, 25 Miocene and Pliocene volcanic rock units, and Quaternary colluvium and alluvium. Volcanic rocks in drill holes are classified into two chemical groups, four depositional processes, and four alteration types. Alteration of the volcanic rocks to predominantly zeolites, clay minerals, or silica is related to both stratigraphy and structure. Pre-volcanic structures are the CP thrust fault, a right-lateral fault zone that can be projected into the U12n area, and the Gold Meadows stock; Tertiary structures are depositional folds and predominantly normal faults. The right-lateral fault zone may have provided pre-existing planes of weakness during Tertiary deformation that resulted in west-northwest to northwest normal faults in the U12n area in contrast to north-south to north-northeast faults north and south of the U12n area. Normal faults at tunnel level have displacements that range from less than 3 to 125 ft or more. The Tertiary volcanic rocks were deposited on a pre-Tertiary, steep-sided drainage system and formed depositional folds. The Rainier Mesa depositional syncline is the major structures in the U12n area in addition to the normal faults. Drill-hole data indicate that the axis of syncline in the volcanic rocks parallels the contact between quartzite in the upper plate and dolomite and limestone in the lower plate of the CP thrust fault. 29 refs., 6 figs., 10 tabs.

Hoover, D.L.; Magner, J.E.

1990-01-01

98

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

SciTech Connect

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.

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

2013-07-01

99

Results of exploratory drill hole UE7nS East-Central Yucca Flat, Nevada Test Site  

SciTech Connect

Exploratory hole UE7nS was drilled to a depth of 672.1 m in East-Central Yucca Flat, Nevada Test Site, as part of a program sponsored by the Nuclear Monitoring Office (NMO) of the Advanced Research Projects Agency (ARPA). The purpose of the program is to determine the geologic and geophysical characteristics of selected locations that have demonstrated anomalous seismic signals. The purpose for drilling UE7nS was to provide the aforementioned data for emplacement site U7n. This report presents lithologic and stratigraphic descriptions, geophysical logs, physical properties, and water table measurements. An analysis of these data has been made and a set of recommended values is presented.

Wagoner, J.L.; Ramspott, L.D.

1981-03-02

100

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

E-print Network

significantly higher on the sheared watersheds (2,620 lb/acre) than the chopped (22 lb/acre), during 1981. By the fall of 1982, the exposure of mineral soil on the sheared sites decreased to 20% and to 4% on the chopped sites. For this reason and the lower...

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

101

36 CFR 7.39 - Mesa Verde National Park.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Mesa Verde National Park. 7.39 Section 7.39 ...Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR...SPECIAL REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.39 Mesa...

2010-07-01

102

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

NASA Astrophysics Data System (ADS)

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.

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

2014-09-01

103

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

SciTech Connect

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.

TROYER, G.L.

1999-03-31

104

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

SciTech Connect

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.

SAIC

2011-04-01

105

Discovery of Off-Axis Melt Lenses at the RIDGE-2000 East Pacific Rise Integrated Studies Site  

NASA Astrophysics Data System (ADS)

The first multi-streamer 3D seismic reflection experiment conducted aboard the R/V Marcus Langseth was carried out in July-August 2008 at the RIDGE-2000 Integrated Studies Site at the East Pacific Rise between 9°37'N and 9°57'N. One of the major findings of this cruise is the presence of at least three regions with prominent near-axis crustal reflectors that we interpret as off-axis melt lenses (OAML) injected at mid-crustal levels to both the east and west of the ridge crest. In some instances these regions are associated with subtle topographic expressions of seafloor volcanism. The first set of OAML reflections was discovered near 9° 54'N at distances from the ridge axis that range from ~4 to ~7 km, and extending ~6.3 km in the ridge-parallel direction. Two-way travel times from the seafloor to the OAML are 750-830 ms, which correspond to depths of ~1,800-2,000 m (assuming an average upper crustal velocity of 4.7 km/s), although in some cases there is evidence for deeper (~1,420 ms, or ~3,330 m) reflections farther off-axis forming a staircase-like system of melt lenses. A second set of OAML reflections was discovered further south near 9° 39'N also within 3-6 km east of the spreading axis, and extending ~3.3 km in the ridge-parallel direction. Crustal travel times to these OAML reflections are 710-830 ms (1,700-2,000 m below seafloor). In this region the OAML is locally underlain by deeper reflections at depths of 1,300 ms (~3,100 m) that could indicate off-axis melt sill intrusions at multiple levels. A smaller OAML was found within 2 km west of the axis near 9° 52'N. In this paper we present preliminary cross-sections of this dataset to evaluate the extent and general characteristics of these off-axis events, which highlight the importance of off-axis magmatism in crustal accretion along this section of the East Pacific Rise.

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

2008-12-01

106

Associations between total serum GGT activity and metabolic risk: MESA  

PubMed Central

Aim To evaluate associations between total serum GGT activity, metabolic risk factors and prevalent metabolic disease in MESA. Patients & methods Continuous associations between GGT and fasting blood glucose (FBG), fasting insulin, HbA1c and Homeostasis Model Assessment Index of Insulin Resistance (HOMA–IR) were evaluated in the entire MESA cohort and in metabolic disease subgroups using linear regression models incrementally adjusted for age, gender, site, race, lifestyle, traditional risk factors and medications. Cross-sectional odds of prevalent impaired FBG, metabolic syndrome and Type 2 diabetes were calculated for GGT quintiles in the entire cohort and in subgroups defined by age (< or ?65 years) and ethnicity. Results In multivariable models, significant associations were present between GGT activity and FBG, fasting insulin, HbA1c and HOMA–IR, with the interaction between GGT and BMI affecting the association between GGT and HOMA–IR as well as the association between BMI and HOMA–IR (p < 0.0001). Adjusted odds ratios (95% CIs) of prevalent impaired FBG, metabolic syndrome and Type 2 diabetes for quintile 5 versus 1 in the entire cohort were 2.4 (1.7–3.5), 3.3 (2.5–4.5) and 2.8 (1.8–4.4), respectively (p < 0.0001). GGT associations weakened with age. The significance of linear trends for increased prevalent metabolic disease by increasing GGT quintile varied by ethnicity. Conclusion GGT is strongly associated with both cardiovascular and metabolic risk factors, including prevalent metabolic disease, in the MESA cohort. PMID:24044563

Bradley, Ryan; Fitzpatrick, Annette L; Jenny, Nancy S; Lee, Duk-Hee; Jacobs, David R

2014-01-01

107

Archaeological investigations on the Buckboard Mesa Road Project  

SciTech Connect

In 1986, the Desert Research Institute (DRI) conducted an archaeological reconnaissance of a new alignment for the Buckboard Mesa Road on the Nevada Test Site for the Department of Energy (DOE). During this reconnaissance, several archaeological sites of National Register quality were discovered and recorded including a large quarry, site 26Ny4892, and a smaller lithic scatter, site 26Ny4894. Analysis of the debitage at 26Ny4892 indicates that this area was used primarily as a quarry for relatively small cobbles of obsidian found in the alluvium. Lithic reduction techniques used here are designed for efficiently reducing small pieces of toolstone and are oriented towards producing flake blanks from small cores and bifacially reducing exhausted cores. Projectile point cross references indicate that the area has seen at least casual use for about 10,000 years and more sustained use for the last 3,000 years. Initial obsidian hydration measurements indicate sustained use of the quarry for about the last 3,000 years although the loci of activities appear to change over time. Based on this study, the DRI recommends that quarrying activities in the area of 26Ny4892 are sufficiently sampled and that additional investigations into that aspect of prehistoric activity in the area are not necessary. This does not apply to other aspects of prehistoric use. DRI recommends that preconstruction surveys continue to identify nonquarrying, prehistoric utilization of the area. With the increased traffic on the Buckboard Mesa Road, there is a greater potential for vandalism to sites of National Register-quality located near the road. The DRI recommends that during the orientation briefing the workers at the Test Site be educated about the importance of cultural resources and the need for their protection. 202 refs., 41 figs., 52 tabs.

Amick, D.S.; Henton, G.H.; Pippin, L.C.

1991-10-01

108

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Supplementary seismic hazard results for sites with multiple soil conditions  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume 6). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 8, contains the hazard results for the twelve sites which were primarily rock sites.

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

1989-01-01

109

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

Microsoft Academic Search

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

N. W. Golchert; R. G. Kolzow

2003-01-01

110

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

E-print Network

of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1063, USA Received 25 October 2001; received; Kerguelen Plateau; sediments; Pliocene; Paleoclimatology; ODP Site 745 1. Introduction Public concern. This hypothesis is sup- ported by oceanic oxygen isotope records, cosmo- 0012-821X / 02 / $ ^ see front matter Ã?

111

Career Spanish at Mesa State College.  

ERIC Educational Resources Information Center

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…

Pilkenton, David

112

High-frequency constricted mesa lasers  

SciTech Connect

InGaAsP cw constricted mesa lasers at 1.3 ..mu..m are described which have a small-signal 3-dB bandwidth of 20 GHz at -70 /sup 0/C. Large-signal pseudorandom modulation at 8 Gb/s resulted in 100% optical modulation. The lasers were gain switched at 12 GHz with 100% optical modulation.

Bowers, J.E.; Hemenway, B.R.; Gnauck, A.H.; Bridges, T.J.; Burkhardt, E.G.; Wilt, D.P.; Maynard, S.

1985-07-15

113

Geophysical investigations at Pahute Mesa, Nevada. Final report, 17 Feb 89-21 Nov 91  

SciTech Connect

Part 1 of this study has concentrated on the assembly of a data base of geological and geophysical data for a transect at Pahute Mesa, Nevada. Existing data, in the form of well logs, gravity observations and seismic travel times, have been supplemented by new gravity and seismic data especially for the construction of a geophysical model of the shallow crust. The transect is modeled as an extension basin, with up to 5 km of structural relief and volcanic fill. Major faulting is on the east side. The second part of this study has applied the new GPS technology to geogetic monitoring of nuclear explosions at Pahute Mesa, Nevada. Significant deformation is observed to be caused by the test BULLION. New rapid survey methods have been successfully applied to perform studies, which would have been otherwise prohibitively time consuming.

Ferguson, J.F.

1992-04-30

114

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

NASA Astrophysics Data System (ADS)

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.

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

2013-12-01

115

Carbon sequestration potential in reclaimed mine sites in seven east-central states  

SciTech Connect

Terrestrial systems represent a significant potential carbon (C) sink to help mitigate or offset greenhouse gas emissions. Nearly 3.2 Mha are permitted for mining activities in the United States, which are required to be reclaimed with vegetative cover. While site-specific studies have assessed C accumulation on reclaimed mine sites, regional analyses to estimate potential C increases have not been conducted. For this analysis, potential C sequestration is analyzed on 567000 ha of mine land in a seven-state region reclaimed to cropland, pasture, or forest. Carbon accumulation is estimated for cropland, pasture, and forest soils, forest litter layer, and aboveground biomass by estimating average annual rates of C accumulation from site-specific and general C sequestration studies. The average annual rate of C storage is highest when mine land is reclaimed to forest, where the potential sequestration is 0.7 to 2.2 Tg yr{sup -1}. The C from soils, litter layer, and biomass from mine lands reclaimed to forest represents 0.3 to 1.0% of the 1990 CO{sub 2} emissions from the study region (919 Tg CO{sub 2}). To achieve the greenhouse gas (GHG) emission reduction goal of 7% below the 1990 level as proposed by the Kyoto Treaty requires CO{sub 2} emissions in the study area to be reduced by just over 64 Tg CO{sub 2}. The potential carbon storage in mine sites reclaimed to forest could account for 4 to 12.5% of these required reductions.

Sperow, M. [West Virginia University, Morgantown, WV (United States). Division of Resources Managment

2006-07-15

116

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

E-print Network

ecological amplitude of the species and its ability to grow well on a variety of sites. Erroneous estimates of s1te index, resulting from projection of heights for young trees to the index age, may further reduce correlation. Correlation of longleaf... species, dominates forests only as long as periodic fires occur (Watson, 1940; Wahlenberg, 1946; Walker and Wiant, 1966; Croker, 1968). It is resistant to fire at certain stages in its growth, while most competing tree species are fire intolerant. Fire...

Larson, Eric Hays

2012-06-07

117

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Results and discussion for the Batch 3 sites  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume. Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 4, presents the seismic hazard estimates for the 16 sites in ''Batch 3''.

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

1989-01-01

118

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Results and discussion for the Batch 2 sites  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume 6). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 3, presents the seismic hazard estimates for the 17 sites in ''Batch 2''.

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

1989-01-01

119

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Results and discussion for the Batch 4 sites  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume 6). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 5, provides the seismic hazard estimates for the 17 sites in ''Batch 4''.

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

1989-01-01

120

Seismic hazard characterization of 69 nuclear plant sites east of the Rocky Mountains: Results and discussion for the Batch 1 sites  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume (Volume 6). Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 2, presents the seismic hazard estimates for the 19 sites in ''Batch 1''.

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

1989-01-01

121

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

Modelling soil moisture for a grassland and a woodland site in south-east England 39 Hydrology and Earth System Sciences, 6(1), 39­47 (2002) © EGS Modelling soil moisture for a grassland and a woodland Office soil moisture model that is used by agriculture, flood modellers and weather forecasters

Paris-Sud XI, Université de

122

Perchlorate in fish from a contaminated site in east-central Texas.  

PubMed

Perchlorate, a known thyroid endocrine disruptor, contaminates surface waters near military instillations where solid fuel rocket motors are manufactured or assembled. To assess potential perchlorate exposure to fish and the human population which may feed on them, fish were collected around the Naval Weapons Industrial Reserve Plant in McLennan County, TX, and analyzed for the presence of the perchlorate anion. The sampling sites included Lake Waco and Belton Lake, and several streams and rivers within their watersheds. The general tendency was that perchlorate was only found in a few species sampled, and perchlorate was not detected in every individual within these species. When detected in the fish, perchlorate tissue concentrations were greater than that in the water. This may be due to highly variable perchlorate concentrations in the water coupled with individual-level variation in elimination from the body, or to routes of exposure other than water. PMID:15993996

Theodorakis, Christopher; Rinchard, Jacques; Anderson, Todd; Liu, Fujun; Park, June-Woo; Costa, Filipe; McDaniel, Leslie; Kendall, Ronald; Waters, Aaron

2006-01-01

123

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  

SciTech Connect

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 site locations, some of them with several local soil conditions. The method developed uses expert opinions to obtain the input to the analyses. An important aspect of the elicitation of the expert opinion process was the holding of two feedback meetings with all the experts in order to finalize the methodology and the input data bases. The hazard estimates are reported in terms of peak ground acceleration (PGA) and 5% damping velocity response spectra (PSV). A total of eight volumes make up this report which contains a thorough description of the methodology, the expert opinion's elicitation process, the input data base as well as a discussion, comparison and summary volume. Consistent with previous analyses, this study finds that there are large uncertainties associated with the estimates of seismic hazard in the EUS, and it identifies the ground motion modeling as the prime contributor to those uncertainties. This document, Volume 1, provides an overview of the methodology developed to incorporate the judgment of experts and their quantification of the uncertainties about their input into a seismic hazard analysis using a simulation approach.

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

1989-01-01

124

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

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.

NONE

1995-12-31

125

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

Microsoft Academic Search

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

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

1991-01-01

126

Polarized Electrons and Positrons at the Mesa Accelerator  

NASA Astrophysics Data System (ADS)

We suggest starting an accelerator physics project called the Mainz Energy-recovering Superconducting Accelerator (MESA) as an extension to the experimental facilities at the institute for nuclear physics. MESA may allow us to introduce an innovative internal target regime based on the ERL principle. A second mode of operation will be to use an external polarized electron beam for parity violating experiments. Furthermore, MESA could also allow us to establish a CW source of polarized positrons.

Aulenbacher, K.; Jankowiak, A.

2011-01-01

127

Updated 2/1/13 MESA Engineering Program (MEP)  

E-print Network

Bioinformatics ELIGIBILITY CRITERIA Computer Engineering Computer Science Are you an EOP student? No Yes No Yes BSOE MINOR PURSUIT Applied Mathematics Bioinformatics Computer Engineering Computer Science MESA

California at Santa Cruz, University of

128

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

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}

Guosen Zhang; Jing Zhang; Sumei Liu

2007-01-01

129

Final predictions of ambient conditions along the east-west crossdrift using the 3-D UZ site-scale model. Level 4 milestoneSP33ABM4.  

SciTech Connect

In 1998, the Yucca Mountain Site Characterization Project (YMP) is expected to continue construction of an East-West Cross Drift. The 5-meter diameter drift will extend from the North Ramp of the Exploratory Studies Facility (ESF), near Station 19+92, southwest through the repository block, and over to and through the Solitario Canyon Fault. This drift is part of a program designed to enhance characterization of Yucca Mountain and to complement existing surface-based and ESF testing studies. The objective of this milestone is to use the three-dimensional (3-D) unsaturated zone (UZ) site-scale model to predict ambient conditions along the East-West Cross Drift. These predictions provide scientists and engineers with a priori information that can support design and construction of the East-West Cross Drift and associated testing program. The predictions also provide, when compared with data collected after drift construction, an opportunity to test and verify the calibration of the 3-D UZ site-scale model.

Ritcey, A.C.; Sonnenthal, E.L.; Wu, Y.S.; Haukwa, C.; Bodvarsson,G.S.

1998-03-01

130

Detectors for dark photon search with MESA  

NASA Astrophysics Data System (ADS)

The predictions of the standard model for the anomalous magnetic momentum of the muon, deviates from the direct measurements by 3,6 ?. A gauge boson of a new U(1)-Interaction, the so called dark photon, is predicted in many expansions of the standard model and could explain those deviations. In order to search for such a dark photon, a dedicated experiment is scheduled at the planned low energy accelerator MESA in Mainz. In order to detect dark photons this experiment needs a high resolution detector with a suitable acceptance.

Molitor, Matthias

2013-11-01

131

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 Department of Natural Resources Division of Wildlife, Wetlands Program 6060 Broadway Denver, Colorado 80203

132

How To Start a MESA Center at a Community College.  

ERIC Educational Resources Information Center

Between September 1990 and December 1991, Cabrillo College implemented the Math, Engineering, and Science Achievement (MESA) program to increase the number of underrepresented minority students enrolling in scientific disciplines at Cabrillo and subsequently transferring to four-year colleges. The initial program was targeted to 200 MESA members…

Claire, Susan

133

Two-dimensional velocity models for paths from Pahute Mesa and Yucca Flat to Yucca Mountain; Yucca Mountain Project  

Microsoft Academic Search

Vertical acceleration recordings of 21 underground nuclear explosions recorded at stations at Yucca Mountain provide the data for development of three two-dimensional crystal velocity profiles for portions of the Nevada Test Site. Paths from Area 19, Area 20 (both Pahute Mesa), and Yucca Flat to Yucca Mountain have been modeled using asymptotic ray theory travel time and synthetic seismogram techniques.

M. C. Walck; J. S. Phillips

1990-01-01

134

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

SciTech Connect

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.

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

135

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

SciTech Connect

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.

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

1991-01-01

136

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

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.

Moriarty, K.

2013-02-01

137

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

SciTech Connect

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.

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

1997-02-01

138

Completion Report for Well ER-12-4, Corrective Action Unit 99: Rainier Mesa - Shoshone Mountain (includes Errata Sheet)  

SciTech Connect

Well ER-12-4 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 Test Site, Nye County, Nevada. This well was drilled in May 2005, as part of a hydrogeologic investigation program for the Rainier Mesa-Shoshone Mountain Corrective Action Unit in the north-central portion of the Nevada Test Site. The well is located on Rainier/Aqueduct Mesa, northwest of Yucca Flat, within Area 12 of the Nevada Test Site. The well provided information regarding the radiological and physical environment near underground nuclear tests conducted in U12t Tunnel, information on the pre-Tertiary rocks in the area, and depth to the regional water table.

U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office; Bechtel Nevada

2006-05-01

139

Mesa Top Photovoltaic Array SyStem SpecificationS  

E-print Network

) Characteristics: Single axis tracker photovoltaics, ground mounted Annual output: 1,200 MWh Location: Top of SouthMesa Top Photovoltaic Array SyStem SpecificationS System size: 750 kW (DC, estimated

140

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

141

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

SciTech Connect

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.

NSTec Environmental Management

2011-05-31

142

Conditioning of self-assembled monolayers at two static immersion test sites along the east coast of Florida and its effect on early fouling development.  

PubMed

Among the first events after immersion of surfaces in the ocean is surface 'conditioning'. Here, the accumulation and composition of the conditioning films formed after immersion in the ocean are analyzed. In order to account for different surface chemistries, five self-assembled monolayers that differ in resistance to microfouling and wettability were used. Water samples from two static immersion test sites along the east coast of Florida were collected at two different times of the year and used for experiments. Spectral ellipsometry revealed that conditioning films were formed within the first 24 h and contact angle goniometry showed that these films changed the wettability and rendered hydrophobic surfaces more hydrophilic and vice versa. Infrared reflection adsorption spectroscopy showed that the composition of the conditioning film depended on both the wettability and immersion site. Laboratory and field assays showed that the presence of a conditioning film did not markedly influence settlement of microorganisms. PMID:25303331

Thome, I; Bauer, S; Vater, S; Zargiel, K; Finlay, J A; Arpa-Sancet, M P; Alles, M; Callow, J A; Callow, M E; Swain, G W; Grunze, M; Rosenhahn, A

2014-09-01

143

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

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.

Kayen, R.E.

1997-01-01

144

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

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.

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

1991-01-01

145

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

E-print Network

of Texas. However, little is known about the influence of intensive forest practices or livestock grazing on water quality, yield or site productivity in Texas. This is the only instrumented watershed study in Texas or Louisiana that is currently evaluating...

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

146

National Wind Technology Center Site Environmental Assessment: Bird and Bat Use and Fatalities -- Final Report; Period of Performance: April 23, 2001 -- December 31, 2002  

SciTech Connect

This study was conducted to ascertain actual and potential impacts of wind turbines on populations of birds and bats at the National Wind Technology Center (NWTC) in northern Jefferson County, Colorado. The NWTC, which is part of the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), is located on a mesa dominated by ungrazed grassland with isolated patches of ponderosa pine. Similar lands to the north and west are part of the city of Boulders open space system. Areas to the east and south are part of the Rocky Flats Environmental Technology Site.

Schmidt, E.; Piaggio, A. J.; Bock, C. E.; Armstrong, D. M.

2003-01-01

147

Comparison of mosquito control programs in seven urban sites in Africa, the Middle East, and the Americas  

PubMed Central

Mosquito control programs at seven urban sites in Kenya, Egypt, Israel, Costa Rica, and Trinidad are described and compared. Site-specific urban and disease characteristics, organizational diagrams, and strengths, weaknesses, obstacles and threats (SWOT) analysis tools are used to provide a descriptive assessment of each mosquito control program, and provide a comparison of the factors affecting mosquito abatement. The information for SWOT analysis is collected from surveys, focus group discussions, and personal communication. SWOT analysis identified various issues affecting the efficiency and sustainability of mosquito control operations. The main outcome of our work was the description and comparison of mosquito control operations within the context of each study site’s biological, social, political, management, and economic conditions. The issues identified in this study ranged from lack of inter-sector collaboration to operational issues of mosquito control efforts. A lack of sustainable funding for mosquito control was a common problem for most sites. Many unique problems were also identified, which included lack of mosquito surveillance, lack of law enforcement, and negative consequences of human behavior. Identifying common virtues and shortcomings of mosquito control operations is useful in identifying “best practices” for mosquito control operations, thus leading to better control of mosquito biting and mosquito-borne disease transmission. PMID:17316882

Impoinvil, Daniel E.; Ahmad, Sajjad; Troyo, Adriana; Keating, Joseph; Githeko, Andrew K.; Mbogo, Charles M; Kibe, Lydiah; Githure, John I.; Gad, Adel M.; Hassan, Ali N.; Orshan, Laor; Warburg, Alon; Calderon-Arguedas, Olger; Sanchez-Loria, Victoria M.; Velit-Suarez, Rosanna; Chadee, Dave D.; Novak, Robert J.; Beier, John C.

2007-01-01

148

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)

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.

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

2010-12-01

149

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

Microsoft Academic Search

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

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

150

Comparison of mosquito control programs in seven urban sites in Africa, the Middle East, and the Americas.  

PubMed

Mosquito control programs at seven urban sites in Kenya, Egypt, Israel, Costa Rica, and Trinidad are described and compared. Site-specific urban and disease characteristics, organizational diagrams, and strengths, weaknesses, obstacles and threats (SWOT) analysis tools are used to provide a descriptive assessment of each mosquito control program, and provide a comparison of the factors affecting mosquito abatement. The information for SWOT analysis is collected from surveys, focus-group discussions, and personal communication. SWOT analysis identified various issues affecting the efficiency and sustainability of mosquito control operations. The main outcome of our work was the description and comparison of mosquito control operations within the context of each study site's biological, social, political, management, and economic conditions. The issues identified in this study ranged from lack of inter-sector collaboration to operational issues of mosquito control efforts. A lack of sustainable funding for mosquito control was a common problem for most sites. Many unique problems were also identified, which included lack of mosquito surveillance, lack of law enforcement, and negative consequences of human behavior. Identifying common virtues and shortcomings of mosquito control operations is useful in identifying "best practices" for mosquito control operations, thus leading to better control of mosquito biting and mosquito-borne disease transmission. PMID:17316882

Impoinvil, Daniel E; Ahmad, Sajjad; Troyo, Adriana; Keating, Joseph; Githeko, Andrew K; Mbogo, Charles M; Kibe, Lydiah; Githure, John I; Gad, Adel M; Hassan, Ali N; Orshan, Laor; Warburg, Alon; Calderón-Arguedas, Olger; Sánchez-Loría, Victoria M; Velit-Suarez, Rosanna; Chadee, Dave D; Novak, Robert J; Beier, John C

2007-10-01

151

Characterisation of PM 10 atmospheric aerosols for the wet season 2005 at two sites in East Africa  

NASA Astrophysics Data System (ADS)

Ambient daily PM 10 aerosol samples were collected at two sites in Tanzania in May and June 2005 (during the wet season), and their chemical characteristics were studied. The sites were a rural site in Morogoro and an urban kerbside site in Dar es Salaam. A Gent PM 10 stacked filter unit sampler with sequential Nuclepore polycarbonate filters, providing fine and coarse size fractions, and a PM 10 sampler with quartz fibre filters were deployed. Parallel collections of 24 h were made with the two samplers and the number of these collections was 13 in Morogoro and 16 in Dar es Salaam. The average mass concentration of PM 10 was 27 ± 11 ?g/m 3 in Morogoro and 51 ± 21 ?g/m 3 in Dar es Salaam. In Morogoro, the mean concentrations of organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) were 6.8, 0.51, and 2.8 ?g/m 3, respectively. In contrast, higher mean concentrations (11.9, 4.6, and 3.3 ?g/m 3, respectively) were obtained for Dar es Salaam. At both sites, species and elements, such as black carbon, NH 4+, non-sea-salt SO 42-, K, and Ni (and at Dar es Salaam also V, As, Br, and Pb) were mainly present in the fine size fraction. The common crustal and sea-salt elements, including Na, Mg, Al, Si, Cl, Ca, Ti, Mn, Fe, and Sr, and also NO 3- and P (and to a lesser extent Cu and Zn) were concentrated in the coarse particles. Aerosol chemical mass closure indicated that the PM 10 mass in Morogoro consisted, on average, of 48% organic matter (OM), 44% crustal matter, 4% sea salt, and 2% EC, while in Dar es Salaam OM, crustal matter, sea salt, and EC represented 37%, 32%, 9%, and 9% of the PM 10 mass. The contributions of the secondary inorganic aerosol (non-sea-salt sulphate, nitrate, and ammonium) were small, i.e., only 5% in total at each site. Carbonaceous materials and crustal matter were thus the most important components of the PM 10 mass. It is suggested that biomass burning is a major contributor to the OM; at Dar es Salaam there is also a very substantial contribution from traffic. A source apportionment calculation indicated that 68% of the OC at this site originated from traffic exhaust versus 32% from charcoal burning. The crustal matter at Morogoro is likely mainly attributable to soil dust resuspension, whereas in Dar es Salaam it is likely mostly resuspended road dust.

Mkoma, Stelyus L.; Maenhaut, Willy; Chi, Xuguang; Wang, Wan; Raes, Nico

152

MESA: An Interactive Modeling and Simulation Environment for Intelligent Systems Automation  

NASA Technical Reports Server (NTRS)

This report describes MESA, a software environment for creating applications that automate NASA mission opterations. MESA enables intelligent automation by utilizing model-based reasoning techniques developed in the field of Artificial Intelligence. Model-based reasoning techniques are realized in Mesa through native support of causal modeling and discrete event simulation.

Charest, Leonard

1994-01-01

153

Bioturbation and Holocene sediment accumulation fluxes in the north-east Atlantic Ocean (Benthic Boundary Layer experiment sites)  

Microsoft Academic Search

Bioturbation and Holocene sediment accumulation are quantified in the three experimental areas of the Benthic Boundary Layer (BENBO) programme by means of the natural radionuclides 14C and 210Pb and the artificial radionuclides 137Cs and 241Am. The Holocene accumulation rates, determined by the radiocarbon method, are 4.4 and 6.5cmkyr?1 at sites B (Rockall Plateau, 1100m water depth) and C (Feni Drift,

J. Thomson; L. Brown; S. Nixon; G. T. Cook; A. B. MacKenzie

2000-01-01

154

Impacts of sea-level change on human activity at the early Neolithic forager/cultivator site, Kuahuqiao on the east coast of China  

NASA Astrophysics Data System (ADS)

The date and location of the adoption of rice cultivation by foraging cultures in China is of considerable current interest but its understanding is hampered by a lack of information regarding its palaeoenvironmental context. We present detailed multi-proxy palaeoecological research at the earliest-dated site of rice cultivation in the coastal area of east China which has revealed the precise environmental setting of this early Neolithic settlement and its incipient cultivation at c. 7750 cal. BP. Regional and local environmental changes governed the character of the site and the duration of human activity. The rise in relative sea level up to 8000 cal. BP prompted the development of coastal wetland environments at the head of the Hangzhou Bay. A short period of stable sea level allowed natural hydrological succession and terrestrialisation of the site changing from a brackish/freshwater lake to a freshwater marsh/alder carr, which attracted Neolithic foragers to settle and take advantage of the plentiful food resources present in the wetland, wild rice in particular. After a fire clearance of an alder scrub that prepared the ground for settlement, the Kuahuqiao people maintained a reedswamp-type wet grassland in which rice was grown. As relative sea level rose again around 7600-7500 cal. BP, artificial bunding was used to retain nutrient rich water and prevent tidal flooding to provide rice with the consistent water regime it requires. Such bunding resulted in blockage of water which promoted the growth of aquatic plants such as Cattail. Cropping of Cattail stands may have formed part of the subsistence base. Thesite was overwhelmed by marine inundation around 7400-7200 cal. BP as relative sea level rose rapidly for a couple of meters, after which rice cultivation spread to Neolithic sites of Hemudu type elsewhere in the coastal lowlands.

Zong, Yongqiang; Innes, James; Chen, Zhongyuan; Chen, Chun; Wang, Zhanghua; Wang, Hui

2010-05-01

155

Temporal trajectories of wet deposition across hydro-climatic regimes: Role of urbanization and regulations at U.S. and East Asia sites  

NASA Astrophysics Data System (ADS)

Dominant global patterns of urbanization and industrialization contribute to large-scale modification of the drivers for hydrologic and biogeochemical processes, as evident in Asia, Africa, and South America which are experiencing rapid population and economic growth. One manifestation of urbanization and economic development is decreases in air quality, increases in dry/wet deposition fluxes, and growing adverse impacts on public health and ecosystem integrity. We examined available long-term (1980-2010) observational data, gathered at weekly intervals, for wet deposition at 19 urban sites in the U.S., and monitoring data (2000-2009) available for 17 urban sites at a monthly scale in East Asia. Our analyses are based on data for four constituents (SO42-, NO3-, Ca2+, and Mg2+); differences in atmospheric chemistry and terrestrial sources of these constituents enabled a robust comparative analysis. We examined intra-annual variability and the long-term temporal trajectories of wet deposition fluxes to discern the relative role of anthropogenic and stochastic hydro-climatic forcing. Here, we show that: (1) temporal variability in wet deposition fluxes follows an exponential probability density function at all sites, evidence that stochasticity of rainfall is the dominant control of wet deposition variability; (2) the mean wet deposition flux, ?? (ML-2T-1), has decreased in the U.S. over time since enactment of the Clean Air Act, with ?? having become homogenized across varying hydro-climatic regimes; and (3) in contrast, ?? values for East Asian cities are 3-10 times higher than U.S. cities, attributed to lax regulatory enforcement. Based on the observed patterns, we suggest a stochastic model that generates ellipses within which the ?? temporal trajectories are inscribed. In the U.S., anthropogenic forcing (regulations) is dominant in the humid regions, while variability in hydro-climatic forcing explains inter-annual variability in arid regions. Our stochastic analysis facilitates projections of the temporal trajectory shifts in wet deposition fluxes as a result of urbanization and other land-use changes, climate change, and regulatory enforcement.

Park, Jeryang; Gall, Heather E.; Niyogi, Dev; Rao, P. Suresh C.

2013-05-01

156

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

NASA Astrophysics Data System (ADS)

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 (

Jung, Jinsang; Kawamura, Kimitaka

2011-09-01

157

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

ERIC Educational Resources Information Center

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.…

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

158

La buena mesa colombiana: pretexto para el turismo  

Microsoft Academic Search

El libro “La buena mesa colombiana: pretexto para el turismo” es el fruto del trabajo de grado realizado por las estudiantes Olga Liliana Mantilla y María Catalina Quintero de la Facultad de Administración de Empresas Turísticas y Hoteleras. La investigación constituye un esfuerzo de reflexión sobre la importancia de la valoración de la gastronomía colombiana como expresión cultural y de

Olga Liliana Mantilla; María Catalina Quintero

159

Deep Sea Drilling Project Site 612 bolide event: new evidence of a late Eocene impact-wave deposit and a possible impact site, US east coast  

USGS Publications Warehouse

A remarkable >60-m-thick, upward-fining, polymictic, marine boulder bed is distributed over >15 000 km2 beneath Chesapeake Bay and the surrounding Middle Atlantic Coastal Plain and inner continental shelf. The wide varieties of clast lithologies and microfossil assemblages were derived from at least seven known Cretaceous, Paleocene, and Eocene stratigraphic units. The supporting pebbly matrix contains variably mixed assemblages of microfossils along with trace quantities of impact ejecta. The youngest microfossils in the boulder bed are of early-late Eocene age. On the basis of its unusual characteristics and its stratigraphic equivalent to a layer of impact ejecta at Deep Sea Drilling Project (DSDP) Site 612. It is postulated that this boulder bed was formed by a powerful bolide-generated wave train that scoured the ancient inner shelf and coastal plain of southeastern Virginia. -from Authors

Poag, C. W.

1992-01-01

160

40Ar 39Ar age constraints on neogene sedimentary beds, Upper Ramparts, half-way Pillar and Canyon village sites, Porcupine river, east-central Alaska  

USGS Publications Warehouse

40Ar 39Ar ages of volcanic rocks are used to provide numerical constraints on the age of middle and upper Miocene sedimentary strata collected along the Porcupine River. Intercalated sedimentary rocks north of latitude 67??10???N in the Porcupine terrane of east-central Alaska contain a rich record of plant fossils. The fossils are valuable indicators of this interior region's paleoclimate during the time of their deposition. Integration of the 40Ar 39Ar results with paleomagnetic and sedimentological data allows for refinements in estimating the timing of deposition and duration of selected sedimentary intervals. 40Ar 39Ar plateau age spectra, from whole rock basalt samples, collected along the Upper Ramparts and near Half-way Pillar on the Porcupine River, range from 15.7 ?? 0.1 Ma at site 90-6 to 14.4 ?? 0.1 Ma at site 90-2. With exception of the youngest basalt flow at site 90-2, all of the samples are of reversed magnetic polarity, and all 40Ar 39Ar age spectrum results are consistent with the deposition of the entire stratigraphic section during a single interval of reversed magnetic polarity. The youngest flow at site 90-2 was emplaced during an interval of normal polarity. With age, paleomagnetic and sedimentological data, the ages of the Middle Miocene sedimentary rocks between the basalt flows at sites 90-1 and 90-2 can be assigned to an interval within the limits of analytical precision of 15.2 ?? 0.1 Ma; thus, the sediments were deposited during the peak of the Middle Miocene thermal maximum. Sediments in the upper parts of sites 90-1 and 90-2 were probably deposited during cooling from the Middle Miocene thermal maximum. 40Ar 39Ar results of plagioclase and biotite from a single tephra, collected at sites 90-7 and 90-8 along the Canyon Village section of the Porcupine River, indicate an age of 6.57 ?? 0.02 Ma for its time of eruption and deposition. These results, together with sedimentological and paleomagnetic data, suggest that all of the Upper Miocene lacustrine sedimentary rocks at these sites were deposited during a single interval of reversed magnetic polarity and may represent a duration of only about 40,000 years. The age of this tephra corresponds with a late late Miocene warm climatic interval. The results from the Upper Ramparts and Half-way Pillar sites are used to estimate a minimum interval of continental flood basalt activity of 1.1-1.5 million years, and to set limits for the timing and duration of Tertiary extensional tectonic activity in the Porcupine terrane. Our data indicate that the oroclinal flexure that formed before the deposition of the basalts at the eastern end of the Brooks Range was created prior to 15.7 ?? 0.1 Ma. ?? 1994.

Kunk, M. J.; Rieck, H.; Fouch, T. D.; Carter, L. D.

1994-01-01

161

East Timor  

NSDL National Science Digital Library

This Week's In the News examines the escalation of violence and the proposal for autonomy in the Indonesian province of East Timor. Last weekend, anti-independence militiamen killed dozens of separatist activists in Dili, the East Timorese capital, intensifying the fierce bloodshed and political tumult in the province. The recent massacre is just one of several brutal episodes that have plagued East Timor in the past quarter-century. The people of the embattled island have suffered numerous human rights violations, have endured economic collapse, and have been decimated by guerrilla warfare, famine, and disease. Over 200,000 East Timorese -- or nearly one-fourth of the population -- have died in the troubles, which began in 1975 when Portugal abruptly abandoned East Timor after 400 years of colonial rule. Unstable and vulnerable, the newly independent East Timor was quickly invaded, occupied, and annexed in 1976 by Indonesia, a stronger nation that quashed all subsequent separatist movements. Last January, after years of political oppression, Indonesia's parliament finally succumbed to international pressure and announced that it would grant East Timor either full independence or autonomy within the Indonesian state. The United Nations, although it has never officially recognized Indonesia's sovereignty over East Timor, plans to supervise a vote, tentatively scheduled for July, wherein the East Timorese will determine whether they want full independence or provincial autonomy. Later this week, Foreign Ministers Ali Alatas of Indonesia and Jaime Gama of Portugal are meeting in New York with UN Secretary-General Kofi Annan to discuss the East Timorese autonomy option and plan for the pending UN-monitored poll. However, the recent resurgence of violence between anti- and pro-independence factions in and around Dili threatens the viability of the proposed poll and endangers the stability of East Timor's self-determination. The nine resources discussed offer background information, the latest news, political analysis, and social commentary.

Osmond, Andrew.

1999-01-01

162

Shrinking and swelling clays under droughts: measurements at the Mormoiron test-site and first analyses (Vaucluse, South-East of France)  

NASA Astrophysics Data System (ADS)

In France, exceptional periods of rainfall deficit (1976, 1989 to 1991 and 1996 to 1997) have caused damages to houses due to their vulnerability to shrinking and swelling clays phenomenon. Between 1998 and 2010, BRGM has been producing a national hazard map related to shrinking and swelling clays, built by crossing geological data and information on density of damages for each geological formation (methodology developed since 1995). The intense drought of summer 2003 has pointed out the necessity of a better understanding of this phenomenon. At the request of the French Ministry of Environment, BRGM has developed a new method for measuring the moisture evolution with depth in order to study its impact on the swelling capacity of clayed soil. The site of Mormoiron (Vaucluse, South-East of France) has then been instrumented for that purpose, with moisture sensors (since December 2004) and extensometers (since March 2009) at different depths. These data have been used to test and improve existing empirical models which are supposed to assess settlements and swellings, depending on the soil water content. Compilations of different measurements have shown, after basic processing made on the data (filtering, resampling, etc.), evident correlations between rain and surface displacements. The model finally obtained gives quite good dependence between these two quantities for the uppermost soil layers (0.2m and 0.5m). More research are being undertaken to physically explain this relationship, particularly for deeper layers. These results should lead to propose a calibrated model for predicting soil deformations from climatic data.

Gourdier, Sébastien; Vandromme, Rosalie; Grandjean, Gilles

2013-04-01

163

Premining evaluation of forage grass growth on mine soil materials from an east-central Texas lignite site: 2. soil profile horizons  

SciTech Connect

Several warm-season forage grasses and a cool-season pasture mix of oats plus clover were grown in a greenhouse on mixtures of soil profile horizon materials from an unmined lignite site in east-central Texas and then evaluated as to the suitability of the various soil materials for selective placement over regraded lignite mine spoil during land reclamation. Mixtures of the clayey subsoil horizon materials with the sandy loam topsoil (A horizon) produced soils that had sandy clay loam textures. Whereas the topsoil had a pH of 6.3 and an electrical conductivity of 0.2 millimhos per centimeter, the pH of the soil mixtures ranged from 5.1 to 6.0, and the conductivities from 0.3 to 1.7 mmho/cm. Dry matter production was greater on the topsoil during early stages of plant growth, especially where no fertilizer was added. Differences among soils declined with fertilizer application and degree of plant establishment through successive harvests. Chemical analysis of plant tissue showed adequate uptake of added nitrogen and phosphorus plus indigenous iron, manganese, and zinc from all soils. There were no indications of physical or chemical properties that would adversely affect forage growth on any of the soils. I concluded that, given an adequate regime of water and nutrient supply, the various mixtures of soil profile horizon materials evaluated had the same potential for forage grass production as the genetic topsoil that occurred on the mine site. Any one or a combination of them could probably be used successfully in selective placement over mine spoil for revegetation. Because short-term greenhouse studies may not account for agronomic problems that might arise due to weathering of previously unexposed subsurface soil profile materials, these conclusions are currently being field tested.

Chichester, F.W.

1983-04-01

164

Delineation of site-specific management zones by fuzzy clustering of soil and topographic attributes: A case study of East Nile Delta, Egypt  

NASA Astrophysics Data System (ADS)

The objective of this study was to define site-specific management zones of 67.2 ha of a wheat pivot field at East of Nile Delta, Egypt for use in precision agriculture based on spatial variability of soil and topographic attributes. The field salinity was analysed by reading the apparent soil electrical conductivity (ECa) with the EM38 sensor horizontally and vertically at 432 locations. The field was sampled for soil attributes systematically with a total of 80 sampling location points. All samples were located using GPS hand held unit. Soil sampling for management zones included soil reaction pH, soil saturation percentage, organic matter, calcium carbonates content, available nitrogen, available phosphorus and available potassium. The field topographic attributes were digital elevation model (DEM), slope, profile curvature, plane curvature, compound topographic index (CTI) and power stream index (PSI). The maps of spatial variability of soil and field topographic attributes were generated using ordinary kriging geostatistical method. Principal component analysis (PCA) was used to determine the most important soil and topographic attributes for representing within-field variability. Principal component analysis of input variables indicated that EM38 horizontal readings (EM38h), soil saturation percentage and digital elevation model were more important attributes for defining field management zones. The fuzzy c-means clustering method was used to divide the field into potential management zones, fuzzy performance index (FPI) and normalized classification entropy (NCE) were used to determine the optimal cluster numbers. Measures of cluster performance indicated no advantage of dividing these fields into more than five management zones. The defined management zones not only provided a better description of the soil properties, but also can direct soil sampling design and provide valuable information for site-specific management in precision agriculture.

Saleh, A.; Belal, A. A.

2014-02-01

165

Cysteamine enhances the procoagulant activity of Factor VIII-East Hartford, a dysfunctional protein due to a light chain thrombin cleavage site mutation (arginine-1689 to cysteine).  

PubMed Central

We have recently identified the molecular defect responsible for cross-reacting material-positive hemophilia A in two unrelated patients in which the substitution of cysteine for arginine-1689 (Factor VIII-East Hartford[FVIII-EH]) abolishes a critical Factor VIII light chain thrombin cleavage site. As other mutant proteins with a cysteine for arginine substitution have been modified in the presence of cysteamine, we have determined the effect of this and other reducing agents on FVIII-EH function. Cysteamine concentrations between 0.1 and 10 mM caused dose- and time-dependent increases in FVIII-EH VIII:C activity, as much as 14-fold (to 35 and 62 U/dl for the two patients tested). Comparable data were obtained in a standard one-stage VIII:C coagulation assay and in a chromogenic substrate assay measuring Factor Xa generation. Thrombin cleavage of the FVIII-EH light chain in the presence of cysteamine was documented by immunoadsorption and analysis. Cystamine and cysteamine-S-phosphate, similar compounds that do not possess a free thiol group, had no effect. Cysteamine augmentation of FVIII-EH VIII:C was abolished by the simultaneous addition of N-ethyl maleimide or iodoacetamide, but these sulfhydryl blocking agents did not prevent the VIII:C increase and light chain cleavage by thrombin if the plasma samples were dialyzed to remove the inhibitors before adding the cysteamine. However, incubation with DTT before iodoacetamide prevented the cysteamine effect after dialysis. These data suggest that when isolated from patient plasma, FVIII-EH cysteine-1689 is present in a disulfide bond. This bond is cleaved by cysteamine to form a new mixed disulfide, a pseudolysine that restores a thrombin cleavage site that is essential for procoagulant function. Images PMID:1569180

Aly, A M; Arai, M; Hoyer, L W

1992-01-01

166

Upper Crustal Structure above Off-axis Magma Lenses at RIDGE-2000 East Pacific Rise Integrated Study Site from 2008 3D Multichannel Seismic Reflection Data  

NASA Astrophysics Data System (ADS)

During the 2008 multi-streamer 3D seismic reflection experiment conducted aboard the R/V Marcus Langseth at the RIDGE-2000 Integrated Study Site at the East Pacific Rise between 9°37'N and 9°57'N, three regions with prominent near-axis crustal reflectors (near 9° 54'N, 9° 52’N, 9° 39’N) were discovered and interpreted as off-axis melt lenses (OAML) injected at mid-crustal levels to both the east and west of the ridge crest. To study the effects of OAML on upper crustal structure, we applied 2-D processing on two across-axis lines of a small 3D grid that crosses part of the southernmost OAML: Line 1428P (9° 38’N) across the middle part of the OAML and line 1476P (9° 39’N) across the northern end of this OAML. The preliminary results show that the OAML reflections are clear and bright on profile 1428P whereas a weak OAML reflection is imaged on 1476P. The axial magma lens reflections on both lines are at similar depths of 620 ms twtt. The OAML reflection on 1428P is at 700 ms twtt while the OAML reflection on 1476P lies 200 ms twtt deeper, indicating it may be the diffraction from the northern edge of the OAML. Continuous layer 2A events are seen on both 1428P and 1476P profiles with layer 2A thickness approximately 150 ms twtt on-axis and 300 ms off-axis. On 1428P, optimal stacking velocities for layer 2A above the OAML on the eastern flank are about 50 m/s lower than the velocities for layer 2A on the western flank. However, on 1476P, no differences in layer 2A velocities between the western and eastern flank are evident. These observations of layer 2A structure indicate that the presence of OAML is accompanied by changes in upper crustal structure, which may reflect off-axis magmatism and alteration associated with off-axis hydrothermal circulation. One-dimensional forward modeling of CMP gathers will be conducted to further characterize layer 2A and upper 2B velocity structure.

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

2009-12-01

167

Mesa Verde National Park: Educational Resources  

NSDL National Science Digital Library

This National Park Service site contains general information on planning a visit to the park; information on plants, animals, geology, cliff dwellings, surface archaeological sites, and history of the park; and a classroom activities section. School group activities at the park include identifying geologic formations, seeing museum videos and dioramas, going on trails and tours, and attending evening campground programs. Classroom activities involve the use of a park map, the development of ancestral Puebloan society from about AD 1 to AD 1300, and the history of the National Park Service.

168

Southern high-latitude terrestrial climate change during the Paleocene-Eocene derived from a marine pollen record (ODP Site 1172, East Tasman Plateau)  

NASA Astrophysics Data System (ADS)

Reconstructing the early Paleogene climate dynamics of terrestrial settings in the high southern latitudes is important to assess the role of high-latitude physical and biogeochemical processes in the global climate system. However, whereas a number of high-quality Paleogene climate records has become available for the marine realm of the high southern latitudes over the recent past, the long-term evolution of coeval terrestrial climates and ecosystems is yet poorly known. We here explore the climate and vegetation dynamics on Tasmania from the middle Paleocene to the early Eocene (60.7-54.2 Ma) based on a sporomorph record from Ocean Drilling Program (ODP) Site 1172 on the East Tasman Plateau. Our results show that three distinctly different vegetation types thrived on Tasmania under a high-precipitation regime during the middle Paleocene to early Eocene, with each type representing different temperature conditions: (i) warm-temperate forests dominated by gymnosperms that were dominant during the middle and late Paleocene; (ii) cool-temperate forests dominated by southern beech (Nothofagus) and araucarians across the middle/late Paleocene transition interval (~59.5 to ~59.0 Ma); and (iii) paratropical forests rich in ferns that were established during and in the wake of the Paleocene-Eocene Thermal Maximum (PETM). The transient establishment of cool-temperate forests lacking any frost-sensitive elements (i.e., palms and cycads) across the middle/late Paleocene transition interval indicates markedly cooler conditions, with the occurrence of frosts in winter, on Tasmania during that time. The integration of our sporomorph data with previously published TEX86-based sea-surface temperatures from ODP Site 1172 documents that the vegetation dynamics on Tasmania were closely linked with the temperature evolution in the Tasman sector of the Southwest Pacific region. Moreover, the comparison of our season-specific climate estimates for the sporomorph assemblages from ODP Site 1172 with the TEX86L- and TEX86H-based temperature data suggests a warm-season bias of both calibrations for the early Paleogene of the high southern latitudes.

Contreras, L.; Pross, J.; Bijl, P. K.; O'Hara, R. B.; Raine, J. I.; Sluijs, A.; Brinkhuis, H.

2014-01-01

169

A computationally efficient Multicomponent Equilibrium Solver for Aerosols (MESA)  

Microsoft Academic Search

Development and application of a new Multicomponent Equilibrium Solver for Aerosols (MESA) is described for systems containing H+, NH4+, Na+, Ca2+, SO42?, HSO4?, NO3?, and Cl? ions. The equilibrium solution is obtained by integrating a set of pseudo-transient ordinary differential equations describing the precipitation and dissolution reactions for all the possible salts to steady state. A comprehensive temperature dependent mutual

Rahul A. Zaveri; Richard C. Easter; Leonard K. Peters

2005-01-01

170

Marine Education Society of Australasia, Inc. (MESA)  

NSDL National Science Digital Library

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.

171

Remote sensing for environmental site screening and watershed evaluation in Utah Mine lands - East Tintic mountains, Oquirrh mountains, and Tushar mountains  

USGS Publications Warehouse

Imaging spectroscopy-a powerful remote-sensing tool for mapping subtle variations in the composition of minerals, vegetation, and man-made materials on the Earth's surface-was applied in support of environmental assessments and watershed evaluations in several mining districts in the State of Utah. Three areas were studied through the use of Landsat 7 ETM+ and Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data: (1) the Tintic mining district in the East Tintic Mountains southwest of Provo, (2) the Camp Floyd mining district (including the Mercur mine) and the Stockton (or Rush Valley) mining district in the Oquirrh Mountains south of the Great Salt Lake, and (3) the Tushar Mountains and Antelope Range near Marysvale. The Landsat 7 ETM+ data were used for initial site screening and the planning of AVIRIS surveys. The AVIRIS data were analyzed to create spectrally defined maps of surface minerals with special emphasis on locating and characterizing rocks and soils with acid-producing potential (APP) and acid-neutralizing potential (ANP). These maps were used by the United States Environmental Protection Agency (USEPA) for three primary purposes: (1) to identify unmined and anthropogenic sources of acid generation in the form of iron sulfide and (or) ferric iron sulfate-bearing minerals such as jarosite and copiapite; (2) to seek evidence for downstream or downwind movement of minerals associated with acid generation, mine waste, and (or) tailings from mines, mill sites, and zones of unmined hydrothermally altered rocks; and (3) to identify carbonate and other acid-buffering minerals that neutralize acidic, potentially metal bearing, solutions and thus mitigate potential environmental effects of acid generation. Calibrated AVIRIS surface-reflectance data were spectrally analyzed to identify and map selected surface materials. Two maps were produced from each flightline of AVIRIS data: a map of iron-bearing minerals and water having absorption features in the spectral region from 0.35 ?m to 1.35 ?m and a map of minerals (including clays, sulfates, micas, and carbonates) having absorptions in the spectral region from 1.45 ?m to 2.51 ?m. Several methods were used to verify the AVIRIS mapping results, including field checking of selected locations with a portable spectrometer, visual inspection of the AVIRIS reflectance spectra, and X-ray diffraction (XRD) analysis of field samples. The maps of iron-bearing minerals derived from analysis of the visible (VIS) and near-infrared (NIR) regions of the electromagnetic spectrum were shown to be more consistently reliable in indicating the presence of jarosite than were the maps generated from analysis of the short-wave infrared (SWIR) region. When present in abundance, phyllosilicate minerals tend to dominate the SWIR and mask the spectral features of jarosite in that wavelength region. The crystal field absorptions of jarosite in the VIS and NIR spectral regions will commonly be present regardless of whether the Fe-OH absorption feature near 2.27 ?m can be detected. For this reason, the VIS and NIR were preferable to the SWIR for the remote spectroscopic identification of jarosite (and other iron-bearing minerals). Large exposures of unmined hydrothermally altered rocks occur throughout the three study areas. These rocks commonly contain sulfide or sulfate minerals that produce sulfuric acid upon subaerial oxidation. The acid may be introduced into local surface and ground water and thus lower the baseline (that is, the premining) pH for a watershed. The three study areas also have widespread exposures of rocks with acid-neutralizing potential. Lithologies containing carbonates and (or) other acid-buffering minerals-such as sedimentary limestones and dolomites and propylitically altered igneous rocks-were mapped with the AVIRIS data throughout the Oquirrh and East Tintic Mountains and locally in the Antelope Range and Tushar Mountains. Because elevated levels o

Rockwell, Barnaby W.; McDougal, Robert R.; Gent, Carol A.

2005-01-01

172

Enhanced light output in nitride-based light-emitting diodes by roughening the mesa sidewall  

Microsoft Academic Search

In this letter, we will report on a nitride-based light emitting diode with a mesa sidewall roughening process that increases light output power. The fabricated GaN-based light-emitting diode (LED) wafers were first treated through a photoelectrochemical (PEC) process. The Ga2O3 layers then formed around the GaN : Si n-type mesa sidewalls and the bottoms mesa etching regions. Selective wet oxidation

Chia-Feng Lin; Zhong-Jie Yang; Jing-Hui Zheng; Jing-Jie Dai

2005-01-01

173

Completion Report for Well ER-12-3 Corrective Action Unit 99: Rainier Mesa - Shoshone Mountain  

SciTech Connect

Well ER-12-3 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 March and April 2005 as part of a hydrogeologic investigation program for the Rainier Mesa-Shoshone Mountain Corrective Action Unit. The overall purpose of the well was to gather subsurface data to better characterize the hydrogeology of central Rainier Mesa, especially in the older Tertiary volcanic rocks and Paleozoic sedimentary rocks. The main 47.0-centimeter hole was drilled to a depth of 799.2 meters and cased with 33.97-centimeter casing to 743.1 meters. The hole diameter was then decreased to 31.1 centimeters, and the well was drilled to a total depth of 1,496.0 meters. The completion string consisted of 13.97-centimeter stainless steel casing, with two slotted intervals open to the lower carbonate aquifer, suspended from 19.37-centimeter carbon steel casing. A piezometer string was installed outside the 33.97-centimeter casing to a depth of 467.1 meters to monitor a zone of perched water within the Tertiary volcanic section. 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 35 depths, various geophysical logs, and water level measurements. These data indicate that the well penetrated 674.2 meters of Tertiary volcanic rocks and 821.7 meters of Paleozoic dolomite and limestone. Forty-nine days after the well was completed, but prior to well development and testing, the water level inside the main hole was tagged at the depth of 949.1 meters, and the water level inside the piezometer string was tagged at 379.9 meters.

U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office; Bechtel Nevada Corporation

2006-05-01

174

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)).

2001-01-01

175

Far East  

SciTech Connect

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.

Fletcher, G.L.

1981-10-01

176

Magnetic Fabric Investigations of the Sapinero Mesa and Fish Canyon Tuffs, Northern Part of the Southern Rocky Mountain Volcanic Field, Colorado  

NASA Astrophysics Data System (ADS)

Exposures of two laterally extensive ignimbrites in the northern part of the Southern Rocky Mountain Volcanic Field (SRMVF) allow examination of the emplacement mechanisms of these pyroclastic deposits as a function of deposition on irregular preexisting topography using magnetic fabric techniques. The Sapinero Mesa Tuff (28.19 × 0.03 Ma) was erupted from the San Juan/Uncompahgre Caldera Complex and the Fish Canyon tuff (ca. 28.02 × 0.16 Ma) was erupted from the La Garita caldera. These ignimbrites are major components of the SRMVF and were emplaced on highly irregular paleotopography. The Sapinero Mesa Tuff was emplaced directly on the late Eocene West Elk Breccia near and west of the Blue Mesa reservoir and directly on Precambrian crystalline rocks south of the Blue Mesa reservoir. The Fish Canyon Tuff was emplaced directly on Precambrian crystalline rocks south and southwest of Gunnison. Our study of these two ignimbrites is concentrated in the northern part of the SRMVF and examines how these deposits were emplaced on different topographic features. To date, a total of 16 sites in the Fish Canyon and Sapinero Mesa tuffs have been collected and analyzed for determination of magnetic fabrics through measurements of anisotropy of magnetic susceptibility (AMS). These samples are currently being analyzed for measurements of anisotropy of anhysteretic remanent magnetization (AARM). Initial analyses indicate transport directions that generally coincide with the inferred regional north-northwest transport direction. Additional sampling includes a greater spatial extent and a more focused method of collection with an emphasis on localities chosen with careful consideration of relationships to paleotopographic features present during emplacement of the ignimbrites. Specifically, we have selected linear features of varying scales with strikes that vary significantly from the regional, inferred transport directions. Our work provides a means to compare regional inferred azimuthal flow directions and source location to localized flow directions. The resulting discrepancies may suggest a transport-driven response to local Precambrian topography attending deposition.

Harper, C.; Martin, M.; Geissman, J. W.

2013-12-01

177

East Timor Referendum  

NSDL National Science Digital Library

The East Timorese capital Dili was once again the scene of protest and violence this week, just days before a UN-supervised referendum. On Monday, East Timor's 800,000 residents will choose whether to remain part of Indonesia as an autonomous province or to establish an independent nation. A Portuguese colony for 400 years, East Timor was independent for about a year before it was invaded and annexed by Indonesia in 1976. After decades of military repression and civil strife (see the April 20, 1999 Scout Report for Social Sciences), the post-Suharto Indonesian government announced it would allow the East Timorese to decide their own political fate. In their strongest showing so far, pro-independence advocates organized a rally of up to 10,000 people in the capital on Wednesday. A counter-rally the next day resulted in the worst violence since April, when dozens were killed by anti-independence militias. Despite the violence and continued threats by these militias, United Nations Secretary-General Kofi Annan has made it clear that the twice-postponed vote will be held on Monday as scheduled. The sites listed provide information about East Timor and this historic referendum.

De Nie, Michael W.

178

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)

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.

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

179

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

ERIC Educational Resources Information Center

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)

Bliss, George, II; And Others

1983-01-01

180

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

181

Water quality transformations during soil aquifer treatment at the Mesa Northwest Water Reclamation Plant, USA  

Microsoft Academic Search

Water quality transformations during soil aquifer treatment at the Mesa Northwest Water Reclamation Plant (NWWRP) were evaluated by sampling a network of groundwater monitoring wells located within the reclaimed water plume. The Mesa Northwest Water Reclamation Plant has used soil aquifer treatment (SAT) since it began operation in 1990 and the recovery of reclaimed water from the impacted groundwater has

P. Fox; K. Narayanaswamy; A. Gen; J. E. Drewes

182

Opportunities for parity violating electron scattering experiments at the planned MESA facility  

NASA Astrophysics Data System (ADS)

We suggest to start an accelerator physics project called the Mainz Energy recovering Superconducting Accelerator (MESA) as an extension to our experimental facilities. MESA may allow to introduce an innovative internal target regime based on the ERL principle. A second mode of operation will be to use an external polarized electron beam for parity violating experiments.

Aulenbacher, Kurt

2011-11-01

183

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

ERIC Educational Resources Information Center

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…

Preston, Christine

2010-01-01

184

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

SciTech Connect

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.

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

1999-08-31

185

Effect of mesa structure formation on the electrical properties of zinc oxide thin film transistors.  

PubMed

ZnO based bottom-gate thin film transistor (TFT) with SiO2 as insulating layer has been fabricated with two different structures. The effect of formation of mesa structure on the electrical characteristics of the TFTs has been studied. The formation of mesa structure of ZnO channel region can definitely result in better control over channel region and enhance value of channel mobility of ZnO TFT. As a result, by fabricating a mesa structured TFT, a better value of mobility and on-state current are achieved at low voltages. A typical saturation current of 1.85 x 10(-7) A under a gate bias of 50 V is obtained for non mesa structure TFT while for mesa structured TFT saturation current of 5 x 10(-5) A can be obtained at comparatively very low gate bias of 6.4 V. PMID:24734586

Singh, Shaivalini; Chakrabarti, P

2014-05-01

186

Global Connections: The Middle East  

NSDL National Science Digital Library

Global Connections: The Middle East "integrates and contextualizes the rich body of public broadcasting resources to provide a global and historical perspective that will help teachers, students, and the general public explore and understand seminal events of national and international significance." To that end, there is an exhaustive amount of material related to economics, stereotypes, and the role of women in the Middle East, along with a detailed Middle East timeline. Educators will also find that the site will be a good source of information to use in the classroom. The "Connecting Questions" offers perspectives and lesson plans on six large scale questions affecting the Middle East. The site is rounded out by an interactive sociopolitical map of the region.

2002-01-01

187

Modules for Experiments in Stellar Astrophysics (MESA): Planets, Oscillations, Rotation, and Massive Stars  

NASA Astrophysics Data System (ADS)

We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESA star. Improvements in MESA star's ability to model the evolution of giant planets now extends its applicability down to masses as low as one-tenth that of Jupiter. The dramatic improvement in asteroseismology enabled by the space-based Kepler and CoRoT missions motivates our full coupling of the ADIPLS adiabatic pulsation code with MESA star. This also motivates a numerical recasting of the Ledoux criterion that is more easily implemented when many nuclei are present at non-negligible abundances. This impacts the way in which MESA star calculates semi-convective and thermohaline mixing. We exhibit the evolution of 3-8 M ? stars through the end of core He burning, the onset of He thermal pulses, and arrival on the white dwarf cooling sequence. We implement diffusion of angular momentum and chemical abundances that enable calculations of rotating-star models, which we compare thoroughly with earlier work. We introduce a new treatment of radiation-dominated envelopes that allows the uninterrupted evolution of massive stars to core collapse. This enables the generation of new sets of supernovae, long gamma-ray burst, and pair-instability progenitor models. We substantially modify the way in which MESA star solves the fully coupled stellar structure and composition equations, and we show how this has improved the scaling of MESA's calculational speed on multi-core processors. Updates to the modules for equation of state, opacity, nuclear reaction rates, and atmospheric boundary conditions are also provided. We describe the MESA Software Development Kit that packages all the required components needed to form a unified, maintained, and well-validated build environment for MESA. We also highlight a few tools developed by the community for rapid visualization of MESA star results.

Paxton, Bill; Cantiello, Matteo; Arras, Phil; Bildsten, Lars; Brown, Edward F.; Dotter, Aaron; Mankovich, Christopher; Montgomery, M. H.; Stello, Dennis; Timmes, F. X.; Townsend, Richard

2013-09-01

188

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS  

SciTech Connect

We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESA star. Improvements in MESA star's ability to model the evolution of giant planets now extends its applicability down to masses as low as one-tenth that of Jupiter. The dramatic improvement in asteroseismology enabled by the space-based Kepler and CoRoT missions motivates our full coupling of the ADIPLS adiabatic pulsation code with MESA star. This also motivates a numerical recasting of the Ledoux criterion that is more easily implemented when many nuclei are present at non-negligible abundances. This impacts the way in which MESA star calculates semi-convective and thermohaline mixing. We exhibit the evolution of 3-8 M{sub Sun} stars through the end of core He burning, the onset of He thermal pulses, and arrival on the white dwarf cooling sequence. We implement diffusion of angular momentum and chemical abundances that enable calculations of rotating-star models, which we compare thoroughly with earlier work. We introduce a new treatment of radiation-dominated envelopes that allows the uninterrupted evolution of massive stars to core collapse. This enables the generation of new sets of supernovae, long gamma-ray burst, and pair-instability progenitor models. We substantially modify the way in which MESA star solves the fully coupled stellar structure and composition equations, and we show how this has improved the scaling of MESA's calculational speed on multi-core processors. Updates to the modules for equation of state, opacity, nuclear reaction rates, and atmospheric boundary conditions are also provided. We describe the MESA Software Development Kit that packages all the required components needed to form a unified, maintained, and well-validated build environment for MESA. We also highlight a few tools developed by the community for rapid visualization of MESA star results.

Paxton, Bill; Cantiello, Matteo; Bildsten, Lars [Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106 (United States); Arras, Phil [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Brown, Edward F. [Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48864 (United States); Dotter, Aaron [Research School of Astronomy and Astrophysics, The Australian National University, Weston, ACT 2611 (Australia); Mankovich, Christopher [Department of Physics, University of California, Santa Barbara, CA 93106 (United States); Montgomery, M. H. [Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712 (United States); Stello, Dennis [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Timmes, F. X. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Townsend, Richard, E-mail: matteo@kitp.ucsb.edu [Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706 (United States)

2013-09-15

189

MTF comparisons between mesa and planar focal plane detector structures  

NASA Astrophysics Data System (ADS)

Raytheon Vision Systems (RVS) has developed scanning, high-speed (<3klps), all digital, with on-chip Analog-to-Digital Conversion (ADC), mid-wave infrared (MWIR 3-5mm) focal plane arrays (FPA) with excellent modulation transfer function (MTF) performance. Using secondary ion mass spectrometry (SIMS) data and detailed models of the mesa geometry, RVS modeled the predicted detector MTF performance of detectors. These detectors have a mesa structure and geometry for improved MTF performance compared to planar HgCdTe and InSb detector structures and other similar detector structures such as nBn. The modeled data is compared to measured MTF data obtained from edge spread measurements and shows good agreement, Figure 1. The measured data was obtained using a custom advanced test set with 1µm precision alignment and automatic data acquisition for report generation in less than five minutes per FPA. The measured MTF values of 83 unique parts, Figure 2, had a standard deviation of 0.0094 and a mean absolute deviation of 0.0066 at half Nyquist frequency, showing excellent process repeatability and a design that supports high MTF with good repeatability.

Perley, Mitchell; Wehner, Justin; Buell, Dave; Micali, Jason; McCorkle, Joe; Rehfield, Mark; Williams, Dave; Dixon, Andrew; Malone, Neil

2013-09-01

190

Relations of Principal Components Analysis Site Scores to Algal-Biomass, Habitat, Basin-Characteristics, Nutrient, and Biological-Community Data in the Whitewater River and East Fork White River Basins, Indiana, 2002  

USGS Publications Warehouse

Data were gathered from May through September 2002 at 76 randomly selected sites in the Whitewater River and East Fork White River Basins, Indiana, for algal biomass, habitat, nutrients, and biological communities (fish and invertebrates). Basin characteristics (land use and drainage area) and biolog-ical-community attributes and metric scores were determined for the basin of each sampling site. Yearly Principal Compo-nents Analysis site scores were calculated for algal biomass (periphyton and seston). The yearly Principal Components Analysis site scores for the first axis (PC1) were related using Spearman's rho to the seasonal algal-biomass, basin-charac-teristics, habitat, seasonal nutrient, and biological-community attribute and metric score data. The periphyton PC1 site score was not significantly related to the nine habitat or 12 nutrient variables examined. One land-use variable, drainage area, was negatively related to the periphyton PC1. Of the 43 fish-community attributes and metrics examined, the periphyton PC1 was negatively related to one attribute (large-river percent) and one metric score (car-nivore percent metric score). It was positively related to three fish-community attributes (headwater percent, pioneer percent, and simple lithophil percent). The periphyton PC1 was not statistically related to any of the 21 invertebrate-community attributes or metric scores examined. Of the 12 nutrient variables examined two were nega-tively related to the seston PC1 site score in two seasons: total Kjeldahl nitrogen (July and September), and TP (May and September). There were no statistically significant relations between the seston PC1 and the five basin-characteristics or nine habitat variables examined. Of the 43 fish-community attributes and metrics examined, the seston PC1 was positively related to one attribute (headwater percent) and negatively related to one metric score (large-river percent metric score) . Of the 21 invertebrate-community attributes and metrics exam-ined, the seston PC1 was negatively related to one metric score (number of individuals metric score). To understand how the choice of sampling sites might have affected the results, an analysis of the drainage area and land use was done. The sites selected in the Whitewater River Basin were generally small drainage basins; compared to Whitewater River Basin sites, the sites selected in the East Fork White River Basin were generally larger drainage basins. Although both basins were dominated by agricultural land use the Whitewater River Basin sites had more land in agriculture than the East Fork White River Basin sites. The values for nutrients (nitrate, total Kjeldahl nitrogen, total nitrogen, and total phosphorus) and chlorophyll a (per-iphyton and seston) were compared to published U.S. Environmental Protection Agency (USEPA) values for Aggregate Nutrient Ecoregions VI and IX and USEPA Level III Ecore-gions 55 and 71. Several nutrient values were greater than the 25th percentile of published USEPA values. Chlorophyll a (periphyton and seston) values were either greater than the 25thpercentile of published USEPA values or they extended data ranges in the Aggregate Nutrient and Level III Ecore-gions. If the values for the 25th percentile as proposes by the USEPA were adopted as nutrient water-quality criteria, many samples in the Whitewater River and East Fork White River Basins would have exceeded the criteria.

Caskey, Brian J.; Frey, Jeffrey W.; Lowe, B. Scott

2007-01-01

191

East Africa  

NASA Technical Reports Server (NTRS)

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

2002-01-01

192

Middle East  

SciTech Connect

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.

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

1981-10-01

193

MESAFace, a graphical interface to analyze the MESA output  

NASA Astrophysics Data System (ADS)

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).

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

2013-04-01

194

Fabrication study of GaAs mesa diodes for X-ray detection  

NASA Astrophysics Data System (ADS)

A study of leakage currents using GaAs mesa p-i-n diodes for X-ray photon counting is presented. Different wet chemical etching solution and etch depth were used in the fabrication of these mesa diodes. Low and uniform leakage currents were achieved when the diode fabrication used (i) a combination of main etching solution and finishing etching solution for the etching, and (ii) partially etched mesas. The diodes fabricated using these methods showed well-defined X-ray peaks when illuminated with an 55Fe radioisotope source.

Ng, J. S.; Meng, X.; Lees, J. E.; Barnett, A.; Tan, C. H.

2014-08-01

195

Section A, detail view of parking level sign on east ...  

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

Section A, detail view of parking level sign on east wall of level B2, looking east. (BH) - World Trade Center Site, Bounded by Vesey, Church, Liberty Streets, & Route 9A, New York, New York County, NY

196

APPROACH TO ESTIMATING PARTICIPANT POLLUTANT EXPOSURES IN THE MULTI-ETHNIC STUDY OF ATHEROSCLEROSIS AND AIR POLLUTION (MESA AIR)  

PubMed Central

Most published epidemiology studies of long-term air pollution health effects have relied on central site monitoring to investigate regional-scale differences in exposure. Few cohort studies have had sufficient data to characterize localized variations in pollution, despite the fact that large gradients can exist over small spatial scales. Similarly, previous data have generally been limited to measurements of particle mass or several of the criteria gases. The Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air) is an innovative investigation undertaken to link subclinical and clinical cardiovascular health effects with individual-level estimates of personal exposure to ambient-origin pollution. This project improves on prior work by implementing an extensive exposure assessment program to characterize long-term average concentrations of ambient-generated PM2.5, specific PM2.5 chemical components, and co-pollutants, with particular emphasis on capturing concentration gradients within cities. This paper describes exposure assessment in MESA Air, including questionnaires, community sampling, home monitoring, and personal sampling. Summary statistics describing the performance of the sampling methods are presented along with descriptive statistics of the air pollution concentrations by city. PMID:19673252

Cohen, Martin A.; Adar, Sara D.; Allen, Ryan W.; Avol, Edward; Curl, Cynthia L.; Gould, Timothy; Hardie, David; Ho, Anne; Kinney, Patrick; Larson, Timothy V.; Sampson, Paul; Sheppard, Lianne; Stukovsky, Karen D.; Swan, Susan S.; Liu, L-J Sally; Kaufman, Joel D.

2009-01-01

197

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

...2014-07-01 false Grand Mesa Intrastate Air Quality Control Region. 81.173 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.173 Grand...

2014-07-01

198

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

NASA Technical Reports Server (NTRS)

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.

Goldstein, Selma

1993-01-01

199

Site Alias None Network of Conservation Areas (NCA) NCA Site ID NCA Site Name NCA Site Code - No Data Site Relations Contained in Pagosa Springs (S.USCOHP*27036)  

Microsoft Academic Search

The San Juan River is a major tributary to the Colorado River in the southwest United States, whose headwaters begin in Mineral and Archuleta counties in Colorado. Within the site, the river flows 7.5 miles generally north to south, passing through canyon, mesa and foothill topography in the south-central part of Archuleta County. Several miles below the site to the

2009-01-01

200

Degradation characteristics of STI and MESA-isolated thin-film SOI CMOS  

Microsoft Academic Search

I-V degradations of STI (shallow trench isolation) and MESA-isolated SOI are reported for devices with a given threshold voltage design (VTH≈0.4 V). We show that degradation characteristics of the STI and MESA SOI are quite different from strain-induced degradation observed in LOCOS SOI. It is found that the nMOSFET's I-V degradation becomes more pronounced while pMOSFETs remain relatively constant as

Cheng-Liang Huang; Gregory J. Grula

1997-01-01

201

Sea level rise or shallow-water midden deposition? Archaeopedology at the Seminole Rest archaeological site, coastal East-Central Florida  

Microsoft Academic Search

Sedimentological and faunal studies at the Seminole Rest archaeological site on the Atlantic coast of Volusia County, FL, addressed the question of whether construction of the large shell mound at the site began on dry land or in the shallow waters of Mosquito Lagoon. Particle-size analysis defined a sand body beneath the hardshell clam mound, which is bordered by mucky

Sylvia Scudder

2003-01-01

202

East Tennessee State University Web Privacy Statement  

E-print Network

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

Karsai, Istvan

203

Challenges in Parameterizing a Landscape Evolution Model to Predict 1000 Years of Erosion on a Mesa-top Waste Repository  

NASA Astrophysics Data System (ADS)

Low-level radioactive waste from operations at Los Alamos National Laboratory is currently being disposed in pits excavated into mesa-top repositories. One requirement for operation of the repositories is that no release of radioactive material will occur for up to 1000 years following closure of the repository. LANL is required to demonstrate that the repository can be successfully closed; including demonstrating that the waste pits will not be excavated by long term surface erosion processes. Here we describe the parameterization and application of the Siberia landscape evolution model in the optimization of the closure cap design for the Material Disposal Site G at LANL. The closure design is particularly challenging since some of the older waste pits are located near the edges of a slender finger mesa with complex topography. LANL scientists worked with the cap design engineer at URS in an iterative process to develop a stable design. In addition to design challenges, we faced significant challenges parameterizing the Siberia model for our site. Although we had multiple rainfall, runoff and sediment data sets at a range of scales (plot, first order basin and watershed), these data were not complete enough to develop the relationships required to parameterize Siberia. The data did however provide a strong realty-check on rainfall-runoff and runoff-sediment yield relationships derived from the IRS9 and Hillslope Erosion (HEM) models respectively, which were ultimately used to develop parameter values for the fluvial erosion in Siberia. Diffusion was constrained by eye-balling a match between Siberia generated topography and the observed topography (field and ALSM data) at the heads of first order channels. Siberia runs that generated colluvial hollows (non-existent at this site) indicated that the diffusion coefficient was too high. LA-UR-04-6328.

Wilson, C. J.; Crowell, K. J.; Lane, L. J.

2004-12-01

204

Polychlorinated biphenyls in selected sites in Pasig River and Laguna Lake in the Philippines before and after a big flood event investigated under the UNU East Asia Regional POPs monitoring project.  

PubMed

This paper reports the results of the 2009 United Nations University (UNU) East Asia Regional Monitoring of the Coastal Hydrosphere Project implemented in the Philippines. The monitoring activity focused on the concentrations of 16 specific congeners of Polychlorinated Biphenyls in selected sites in Pasig River and Laguna Lake for two sampling periods in August and in November, 2009. The results show that the total concentrations of PCBs detected in the sampling sites in August increased during the November sampling from 0.9-12.2 to 6.1-32 ng/L in Pasig River and from 0.1-0.9 to 2.9-10.8 ng/L in Laguna Lake. The increase in PCB concentrations on second sampling is attributed to the increase in contaminated sediments in the river sites and to the overflow of contaminated water in the lake sites; both of which could have been caused by the flooding event that occurred in September 2009. PMID:22617945

Santiago, Evangeline C; Rivas, Fritzi

2012-08-01

205

Mesa NTMS 1/sup 0/ x 2/sup 0/ quadrangle area. Supplemental data report  

SciTech Connect

This data report presents supplemental analytical results for stream sediments and ground water. The samples were collected as part of the SRL-NURE reconnaissance in the National Topographic Map Series (NTMS) Mesa 1/sup 0/ x 2/sup 0/ quadrangle. Results are reported for 24 elements (Ag, As, Ba, Be, Ca, Co, Cr, Cu, K, Li, Mg, Mo, Nb, Ni, P, Pb, Se, Sn, Sr, Th, W, Y, Zn, and extractable U) in sediments and 31 elements (Ag, Al, As, B, Ba, Be, Ca, Ce, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Sc, Se, Si, Sr, Th, Ti, V, Y, Zn, and Zr) as well as pH, alkalinity, and conductivity in ground water. Field data and NAA data will be open-filed when they are available. Microfiche cards have been placed in a pocket on the last page of this report. These cards contain the following information: Cards marked Pg. 1, Pg. 2, and Pg. 3 contain histograms, cumulative frequency plots, and areal distribution plots for sediment samples. The card marked Plate 1 is a site-code map for sediment samples.

Koller, G.R.

1980-01-01

206

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

SciTech Connect

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.

Paul W. Reimus; Marc J. Haga

1999-10-01

207

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

Microsoft Academic Search

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

Danny J. Ingold

208

Mesa-sidewall gate leakage in InAlAs\\/InGaAs heterostructure field-effect transistors  

Microsoft Academic Search

InAlAs\\/InGaAs HFETs fabricated by conventional mesa isolation have a potential parasitic gate-leakage path where the gate metallization overlaps the exposed channel edge at the mesa sidewall. The existence of this path has been proven by fabricating special heterojunction diodes with different mesa-sidewall gate-metal overlap lengths. It is found that sidewall leakage is a function of the crystallographic orientation of the

Sandeep R. Bahl; Michael H. Leary; Jesds A. del Alamo

1992-01-01

209

Elimination of mesa-sidewall gate leakage in InAlAs\\/InGaAs heterostructures by selective sidewall recessing  

Microsoft Academic Search

Conventional mesa isolation in InAlAs\\/InGaAs HFETs results in the gate coming in contact with the exposed channel at the mesa sidewall, forming a parasitic gate-leakage path. The authors propose a simple method of recessing the channel edge into the mesa sidewall using a succinic-acid-based selective etchant for InGaAs over InAlAs. SEM photographs confirm the recessing of the channel along the

Sandeep R. Bahl; I. A. del Alamo

1992-01-01

210

Moøller polarimetry with polarized atomic hydrogen at MESA  

NASA Astrophysics Data System (ADS)

A new generation of parity violation (PV) electron scattering experiments are planned to be carried out at the Institut für Kernphysik in Mainz. These experiments will be performed at low energies of 100-200 MeV using the new accelerator MESA (Mainz Energy recovering Superconducting Accelerator). One of the main challenges of such experiments is to achieve an accuracy in beam polarization measurements that must be below 0.5%. This very high accuracy can be reached using polarized atomic hydrogen gas, stored in an ultra-cold magnetic trap, as the target for electron beam polarimetry based on Mo/ller scattering. Electron spin-polarized atomic hydrogen can be stored at high densities of 1016 cm-2, over relatively long time periods, in a high magnetic field (8T) and at low temperatures (0.3K). The gradient force splits the ground state of the hydrogen into four states with different energies. Atoms in the low energy states are trapped in the strong magnetic field region whereas the high energy states are repelled and pumped away. The physics of ultra-cold atomic hydrogen in magnetic traps and the status of the Mainz Hydro-Mo/ller project will be presented.

Bartolomé, P. Aguar; Aulenbacher, K.; Tyukin, V.

2013-11-01

211

Geology of the Horse Range Mesa quadrangle, Colorado  

USGS Publications Warehouse

The Horse Range Mesa quadrangle is one of eighteen 7 1/2-minute quadrangles covering the principal carnotite-producing area of southwestern Colorado. The geology of the quadrangles was mapped by the U.S. Geological Survey for the Atomic Energy Commission as part of a comprehensive study of carnotite deposits. The rocks exposed in the eighteen quadrangles consist of crystalline rocks of pre-Cambrian age and sedimentary rocks that range in age from late Paleozoic to Quaternary. Over much of the area the sedimentary rocks are flat lying, but in places the rocks are disrupted by high-angle faults, and northwest-trending folds. Conspicuous among the folds are large anticlines having cores of intrusive salt and gypsum. Most of the carnotite deposits are confined to the Salt Wash sandstone member of the Jurassic Morrison formation. Within this sandstone, most of the deposits are spottily distributed through an arcuate zone known as the "Uravan Mineral Belt". Individual deposits range in size from irregular masses containing only a few tons of ore to large, tabular masses containing many thousands of tons. The ore consists largely of sandstone selectively impregnated and in part replaced by uranium and vanadium minerals. Most of the deposits appear to be related to certain sedimentary strictures in sandstones of favorable composition.

Cater, Fred W., Jr.; Bush, A.L.; Bell, Henry, III; Withington, C.F.

1953-01-01

212

Darren J. Julian, Jeff Moore, and Tom Hildebrandt Arizona Game and Fish Department, Mesa Region, 7200 E University Ave, Mesa, AZ 85207  

E-print Network

created a method to use GIS software to spatially display the location of wildlife calls by animal type or problem animals Future Considerations ·Human-Wildlife Interaction Database--upgraded to categorize each, 7200 E University Ave, Mesa, AZ 85207 Abstract When wildlife and humans live in close proximity

Hall, Sharon J.

213

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)

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.

Burns, G. S.

1983-01-01

214

Site use by dark-bellied brent geese Branta bernicla bernicla on the Russian tundra as recorded by satellite telemetry: implications for East Atlantic flyway conservation  

Microsoft Academic Search

In 1999, seven dark-bellied brent geese Branta bemicla bemicla were followed during spring migration from western Europe to Arctic Russia using satellite telemetry. For six of the birds we were also able to monitor their summer stay at the Taimyr Peninsula, and for five birds part of their autumn migration was recorded. In this article, we report on site use

Martin Green; Thomas Alerstam; Preben Clausen; Rudi Drent; Barwolt S. Ebbinge

2002-01-01

215

Pericardial adipose tissue and coronary artery calcification in The Multi-Ethnic Study of Atherosclerosis (MESA)  

PubMed Central

We examined the relationship of pericardial adipose tissue (PAT) with coronary artery calcification in MESA, a large cohort in which associations by race/ethnicity can be compared. The baseline cohort comprised 6,814 Caucasian (38%), African American (28%), Chinese American (12%) and Hispanic (22%) adults aged 45–84, without known clinical cardiovascular disease. Cardiac CT was used to measure PAT (cm3) and calcification (Agatston score). We examined cross-sectional associations of PAT with the presence (score>0) and severity (continuous score if >0) of calcification using prevalence ratio (PR) (n=6,672) and linear regression (n=3,362), respectively. Main models were adjusted for age, age2, gender, race/ethnicity, field site, smoking, physical activity, alcohol and education. PAT volume (adjusted for age, height, weight and site) was greatest in Chinese males, while Black males had less PAT than all but Black females. PAT was associated with presence [PR per standard deviation (SD): 1.06 (95% CI: 1.04, 1.08)] and severity [difference in log Agatston score per SD: 0.15 (0.09, 0.21)] of calcification, but neither association varied by race/ethnicity. Adjustment for generalized adiposity attenuated but did not eliminate the associations. With further adjustment for traditional risk factors and inflammatory markers, only the association with severity remained statistically significant [PR: 1.02 (1.00, 1.04), difference: 0.10 (0.03, 0.17)]. Heterogeneity by sex was observed for presence of calcification (PR in men: 1.04; in women: 1.08; p for interaction<0.0001). Pericardial adipose tissue was associated with the presence and severity of coronary artery calcification in this cohort, but despite differences in PAT volumes and calcification across race/ethnic groups, neither association varied by race/ethnicity. PMID:23784910

McClain, JE; Hsu, FC; Brown, ER; Burke, GL; Carr, JJ; Harris, TB; Kritchevsky, SB; Szklo, M; Tracy, RP; Ding, J

2012-01-01

216

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

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.

NONE

1996-08-01

217

CVD Growth of 3C-SiC on 4H/6H Mesas  

SciTech Connect

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.

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

2006-01-01

218

NEST-SITE ATTRIBUTES AND REPRODUCTIVE SUCCESS OF WHITE HEADED AND HAIRY WOODPECKERS ALONG THE EAST-SLOPE CASCADES OF WASHINGTON STATE  

Microsoft Academic Search

Primary cavity excavators serve as keystone species because their abandoned cavities are utilized by other species for nesting, denning, and roosting. Understanding the habitat requirements of primary excavators is necessary to conserve their populations. I studied nest-site selection and reproductive success of White-headed (Picoides albolarvatus) and Hairy Woodpeckers (P. villosus) within managed and fi re-salvaged stands in the ponderosa pine

JEFFREY M. KOZMA

219

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)

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.

Ponce-Zepeda, M. M.

2011-12-01

220

Phas II-clean-up of East Base  

NSF Publications Database

The intent is to preserve the historic values of the site with selected restoration of existing buildings at East Base. USNPS staff have sug- gested that former dump sites with significant historic value be covered with local aggregate to improve the site's appearance and to preserve the sites for future study. The intent of the activity at East Base is to clean up, stabilize and mark the area as an historic site.

221

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

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

Stowell, Michael

222

4. East elevation, facing west (Note: B/W scale on east ...  

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

4. East elevation, facing west (Note: B/W scale on east elevation in 1/2 ft increments) - Nevada Test Site, Reactor Maintenance & Disassembly Complex, Junior Hot Cell, Jackass Flats, Area 25, South of intersection of Roads F & G, Mercury, Nye County, NV

223

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

SciTech Connect

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}).

NONE

1996-12-01

224

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

SciTech Connect

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.

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

225

Women Now Nearly Half of San Diego Mesa Community College's Geographic Information Systems (GIS) Program  

NSDL National Science Digital Library

This brief case study highlights San Diego's Mesa Community College's Geographic Information Systems program, and the strategies that program has adopted to recruit and retain female students. The program took part in the CalWomen Tech Project, which was a collaborative effort by several colleges to increase enrollment of female students in technical areas of study. Some of the strategies that worked for Mesa Community College are outlined here, including: -Identifying female role models in GIS and taking their photos for marketing collateral to be developed by IWITTS and:-Distributing recruitment posters, flyers, brochures and a CalWomenTech College Website section featuring female role models.This narrative, and the lessons that can be learned from the success of Mesa Community College in this area, would be useful for other community college and technical programs looking to increase their numbers of female students.

2012-01-26

226

Coal petrographic genetic units in deltaic-plain deposits of the Campanian Mesa Verde Group (New Mexico, USA)  

E-print Network

Coal petrographic genetic units in deltaic-plain deposits of the Campanian Mesa Verde Group (New stratigraphy; Coal; Maceral analysis; Microlithotype Abstract The Campanian rocks of the Mesa Verde Group units, i.e. intermediate term cycles. The continental facies consist of coastal-plain deposits (coals

Paris-Sud XI, Université de

227

Development of a StrengthsQuest-based Online Orientation Course for the Mathematics Engineering Science Achievement (MESA) Program  

Microsoft Academic Search

MESA Programs have been established in over 30 community colleges in California. A critical component of the Program is the development of a course that helps new students in the community college and MESA environment to adjust to both college life and begin preparing for a professional career in the math- or science-based fields. To date, programs have developed an

J. Farmer

2009-01-01

228

75 FR 9219 - Notice of Intent To Prepare an Environmental Impact Statement for the Otay Mesa Land Port of Entry  

Federal Register 2010, 2011, 2012, 2013

...Statement for the Otay Mesa Land Port of Entry AGENCY: General Services Administration...modernization of the Otay Mesa Land Port of Entry (LPOE) in San Diego, California...Gharavi, Program Director for Land Port of Entry. [FR Doc. 2010-4188...

2010-03-01

229

Pollen and phytolith evidence for rice cultivation and vegetation change during the mid-late Holocene at the Jiangli site, Suzhou, East China.  

PubMed

Pollen and phytolith analyses were undertaken at the Jiangli site in Suzhou, Jiangsu Province, combined with studies on macrofossils by flotation. The concentration of pollen decreased while the percentage of Poaceae pollen in the profile increased from the late phase of the Majiabang Culture to the Songze Culture suggesting that human impact on the local environment intensified gradually. The discovery of rice paddy implies a relatively advanced rice cultivation in this area during the middle-late Holocene. Other than phytoliths, the high percentage of Oryza-type Poaceae pollen (larger than 40 ?m) supplied robust evidence for the existence of rice paddy. Moreover, the fact that the farther from the rice paddy, the lower the concentration and percentage of Poaceae pollen also proves that the dispersal and deposition of pollen is inversely proportional to the distance. PMID:24801163

Qiu, Zhenwei; Jiang, Hongen; Ding, Jinlong; Hu, Yaowu; Shang, Xue

2014-01-01

230

Pollen and Phytolith Evidence for Rice Cultivation and Vegetation Change during the Mid-Late Holocene at the Jiangli Site, Suzhou, East China  

PubMed Central

Pollen and phytolith analyses were undertaken at the Jiangli site in Suzhou, Jiangsu Province, combined with studies on macrofossils by flotation. The concentration of pollen decreased while the percentage of Poaceae pollen in the profile increased from the late phase of the Majiabang Culture to the Songze Culture suggesting that human impact on the local environment intensified gradually. The discovery of rice paddy implies a relatively advanced rice cultivation in this area during the middle-late Holocene. Other than phytoliths, the high percentage of Oryza-type Poaceae pollen (larger than 40 µm) supplied robust evidence for the existence of rice paddy. Moreover, the fact that the farther from the rice paddy, the lower the concentration and percentage of Poaceae pollen also proves that the dispersal and deposition of pollen is inversely proportional to the distance. PMID:24466254

Qiu, Zhenwei; Jiang, Hongen; Ding, Jinlong; Hu, Yaowu; Shang, Xue

2014-01-01

231

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.

232

Mesa-isolated InGaAs photodetectors with low dark current  

NASA Astrophysics Data System (ADS)

We demonstrate InGaAs photodiodes with an epitaxial heterostructure that allows simple mesa isolation of individual devices with low dark current and high responsivity. An undoped InAlAs barrier and passivation layer enables isolation of detectors without exposing the InGaAs active region, while simultaneously reducing electron diffusion current. Photodetectors with mesa sizes as small as 25×25 ?m2 exhibit dark current densities of 10 nA/cm2 at 295 K and responsivities of 0.62 A/W at 1550 nm.

Klem, J. F.; Kim, J. K.; Cich, M. J.; Keeler, G. A.; Hawkins, S. D.; Fortune, T. R.

2009-07-01

233

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.

2000-01-01

234

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

NASA Astrophysics Data System (ADS)

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.

Nelson, G.; Cobabe-Ammann, E.

2004-12-01

235

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)

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.

Kundu, Shuvashish; Kawamura, Kimitaka

2014-09-01

236

1.3-{micro}m buried-heterostructure lasers using a CH{sub 4} reactive-ion-etched mesa structure grown by metalorganic vapor phase epitaxy  

SciTech Connect

This paper reports on the study of using dry etching and metalorganic vapor phase epitaxy (MOVPE) to fabricate of buried-heterostructure (BH) lasers. With a dry-etched mesa, there was anomalously large Zn diffusion into the mesa structure and it seriously degraded the lasing characteristics. Therefore, the authors inserted a buffer layer between the side wall of the dry-etched mesa and the p-InP current blocking layer. The buffer layer almost entirely eliminates Zn diffusion without changing the mesa geometry unlike the wet-etching treatment of the mesa structure. Fabricated lasers show high performance, high uniformity and good reliability.

Kondo, Y.; Kishi, K.; Itoh, M.; Oohashi, H.; Itaya, Y.; Yamamoto, M. [NTT Opto-electronics Labs., Atsugi, Kanagawa (Japan)

1996-12-31

237

Error analysis for Mariner Venus/Mercury 1973 conducted at the JPL Mesa west antenna range  

NASA Technical Reports Server (NTRS)

Theoretical analysis and experimental data are combined to yield the errors to be used with antenna gain, antenna patterns, and RF cable insertion loss measurements for the Mariner Venus-Mercury 1973 Flight Project. These errors apply to measurements conducted at the JPL Mesa, West Antenna Range, on the high gain antenna, low gain antenna, and RF coaxial cables.

Vincent, N. L.; Smith, C. A.; Brejcha, A. J.; Curtis, H. A.

1973-01-01

238

Assessing Hydraulic Connections Across Structural Blocks, Pahute Mesa, Nevada---Interpreting Hydraulic Properties  

Microsoft Academic Search

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 properties of the rocks and structures in this aquifer system control radionuclide migration away from areas of underground nuclear testing. The degree of hydraulic connection between structural blocks greatly affects the direction and distance of

K. J. Halford; J. M. Fenelon; C. Garcia; D. S. Sweetkind

2010-01-01

239

Defect reduction in HgCdTe layers by MBE growth on CdTe mesas  

NASA Astrophysics Data System (ADS)

The performance of infrared detectors is limited by the high defect density in the HgCdTe epilayers especially in the long wavelength region. This necessitates the growth of low defect density material for device fabrication. Patterned CdTe mesas have been proposed to grow low defect density HgCdTe epilayers by MBE. The reduction of defect density by growth on patterned substrates has been reported for different heteroepitaxial systemsootnotetextE.A.Fitgerald et.al `` Nucleation mechanisms and the elimination of misfit dislocations at mismatched interfaces by reduction in growth area'', J. Appl Phys.65 (6), 1989.ootnotetextS.Guha et.al ``Defect reduction in strained InGaAs via growth on GaAs (100) substrates patterned to sub-micron dimensions'' Appl.Phys.Lett.55 (23),1990. We report the growth of HgCdTe epilayers on CdTe mesas, fabricated from CdTe epilayers grown on silicon. A bright field mask with circular features of different sizes (ranging from 80?m-310?m) was used to fabricate mesas by contact lithography and wet isotropic etching. HgCdTe epilayers were grown in a Riber 32P MBE system. Etch pit density measurements were made on the epilayers and a reduction of EPD was observed on the mesas compared to the planar regions of the sample. This reduction of EPD could provide a breakthrough in the infrared technology.

Bommena, Ramana

2005-03-01

240

Process for making a mesa gainasp/inp distributed feedback laser  

SciTech Connect

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.

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

1988-10-11

241

A synthesis of the "Ecological Effects of Reservoir Operations at Blue Mesa Reservoir" Project  

E-print Network

: U.S. Department of the Interior Bureau of Reclamation By: Dr. Brett M. Johnson and Dr. Marci L. Johnson), sailboarders in Cebolla basin (National Park Service), large lake trout captured for growth, diet and stable isotope analyses (B. Johnson), Blue Mesa dam and outlet works (Bureau of Reclamation

242

Women's Self-Efficacy Perceptions in Mathematics and Science: Investigating USC-MESA Students  

ERIC Educational Resources Information Center

Higher education institutions have struggled with the underrepresentation of female students in the STEM majors. The authors investigate the USC-MESA program and the role of women's self-efficacy perceptions in mathematics and science. It is crucial to understand the theory of self-efficacy in examining historically underrepresented populations in…

Hong, Rebecca C.; Jun, Alexander

2012-01-01

243

Mesa Verde: A Study of Man in an Agricultural Setting. Student Manual.  

ERIC Educational Resources Information Center

This student manual contains information and guides to assist the secondary student in functioning as an archeologist. Included are fables, pictures for analysis, a time line and description of the pre-history of Mesa Verde, Colorado. The manual concludes with artifact identification word sheets. A related document is ED 001 722. (AWW)

Community Health Service (DHEW/PHS), Bethesda, MD.

244

Mesa NTMS 1 exp 0 X 2 exp 0 Quadrangle Area. Supplemental Data Report.  

National Technical Information Service (NTIS)

This data report presents supplemental analytical results for stream sediments and ground water. The samples were collected as part of the SRL-NURE reconnaissance in the National Topographic Map Series (NTMS) Mesa 1 exp 0 x 2 exp 0 quadrnangle. Results ar...

G. R. Koller

1980-01-01

245

Mesa NTMS 1 exp 0 X 2 exp 0 Quadrangle Area. Supplemental Data Report.  

National Technical Information Service (NTIS)

This data report presents supplemental analytical results for stream sediments and ground water. The samples were collected as part of the SRL-NURE reconnaissance in the National Topographic Map Series (NTMS) Mesa 1 exp 0 x 2 exp 0 quadrangle. Results are...

G. R. Koller

1980-01-01

246

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

SciTech Connect

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.

NSTec Geology Services

2006-12-01

247

Operations Nougat and Storax in situ stresses in rock, Rainier Mesa, Nevada Test Site  

Microsoft Academic Search

This investigation was made at the recommendation of the Lawrence Radiation Laboratory and funded by the Atomic Energy Commission under Memorandum of Understanding AT(29-2)-914, dated 14 September 1959 and amended by Modifications 9, December 1963. The objectives of this investigation were: (1) To perform surveillance of the stress measurement made by Lucius Pitkin, Inc. (LPI), New York City, in Tunnels

Obert

1964-01-01

248

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

E-print Network

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...

Grimes, Tamisha

2008-07-28

249

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

SciTech Connect

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.

Pippin, L.C.

1998-06-01

250

UN News Centre: The Middle East  

NSDL National Science Digital Library

The Middle East is a vastly complex region, both in terms of its cultural history and the very intricate political economy that is in flux throughout the area. The UN News Centre area dedicated to the Middle East will help interested parties keep abreast of developments in the area, along with providing them access to information about the UN's activities and initiatives in the region. The site organizes the material into a number of sections, such as those that contain press remarks and statements from the Secretary General, resolutions from the Secretary Council, and documents from the General Assembly relating to the Middle East. The homepage also contains specific information on the UN peace missions in such locales as Lebanon and the Golan Heights. As with most sites offered by the UN, the materials on this site are available in Arabic, French, Russian, Spanish, and Chinese.

251

Geological site characterization for the proposed Mixed Waste Disposal Facility, Los Alamos National Laboratory  

SciTech Connect

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.

Reneau, S.L.; Raymond, R. Jr. [eds.

1995-12-01

252

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.

253

Planning and design of additional East Mesa Geothermal Test Facilities. Phase 1B, Volume 2: Procurement package  

Microsoft Academic Search

Procurement packages of technical specifications and construction drawings for eleven test facilities are presented. Each of the specifications includes all of the technical requirements needed for procurement and construction. The information is presented under the following subject headings: injection pump system: injection pipeline; control and instrumentation spools, calibration test bench, test pad modifications, test pad piping headers, production and injection

R. O. Pearson

1976-01-01

254

Final phase testing and evaluation of the 500 kW direct contact pilot plant at East Mesa  

SciTech Connect

The testing performed during the last phase of the geothermal direct contact heat exchanger program utilizing the 500 kW pilot plant provided more insight into the capabilities and limits of the direct contact approach and showed that more work needs to be done to understand the inner workings of a large direct contact heat exchanger if they are to be modeled analytically. Testing of the column demonstrated that the performance was excellent and that the sizing criteria is conservative. The system operated smoothly and was readily controlled over a wide range of operating conditions. Performance evaluation showed pinch differentials of 4/sup 0/F or less and better than predicted heat transfer capability. Testing during this final phase was directed towards establishing the limits of the column to transfer heat. The working column height was shortened progressively to approximately 16 feet from a design length of 28 feet. The short column performed as well as a full length column and there are indications that the column could have been shortened even more without affecting its ability to transfer heat. The column's ability to perform as well with shortened lengths indicates that the heat transfer coefficients and criteria derived from the small scale tests are very conservative.

Olander, R.; Oshmyansky, S.; Nichols, K.; Werner, D.

1983-12-01

255

Site and still life  

E-print Network

This thesis uses the still life as a medium for investigating architecture and the city . An analogy is established between what the thesis defines as still life and an urban composition (a site in East Cambridge). Through ...

Willey, Guy Phillip

1993-01-01

256

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

E-print Network

The Shattuck Sandstone Member of the Guadalupian age Queen Formation was deposited in back-reef environments on a carbonate platform of the Northwest Shelf (Permian Basin, New Mexico, USA) during a lowstand of sea level. At Mesa Queen Field...

Haight, Jared

2004-09-30

257

JPRS Report, East Europe.  

National Technical Information Service (NTIS)

Partial Contents: East Europe, Party Activities, Socialist Party, Freedom Fighters, Education, Youth Training, Historian, Death Penalty, Peace Making Duties, Socialism, Communism, Economics, Restructuring, Catastrophic Condition, Computer Production, edit...

1988-01-01

258

110GHz, 50%-efficiency mushroom-mesa waveguide p-i-n photodiode for a 1.55-?m wavelength  

Microsoft Academic Search

A mushroom-mesa structure is proposed to reduce the CR-time constant which originates from the waveguide photodiode structure. Experimental results at a 1.55-?m wavelength show that the multimode waveguide p-i-n photodiode with mushroom-mesa structure has an electrical 3-dB bandwidth of more than 75 GHz in the frequency domain and an electrical 3-dB bandwidth of 110 GHz in the time domain. The

K. Kato; A. Kozen; Y. Muramoto; Y. Itaya; T. Nagatsuma; M. Yaita

1994-01-01

259

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

SciTech Connect

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.

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

1989-01-01

260

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

PubMed Central

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

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

261

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

USGS Publications Warehouse

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.

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

2013-01-01

262

Investigations on the Structure Tectonics, Geophysics, Geochemistry, and Hydrocarbon Potential of the Black Mesa Basin, Northeastern Arizona  

SciTech Connect

The U.S. Department of Energy (DOE) has instituted a basin-analysis study program to encourage drilling in underexplored and unexplored areas and increase discovery rates for hydrocarbons by independent oil companies within the continental United States. The work is being performed at the DOE's National Institute for Petroleum and Energy Research (NIPER) in Bartlesville, Oklahoma, by the Exploration and Drilling Group within BDM-Oklahoma (BDM), the manager of the facility for DOE. Several low-activity areas in the Mid-Continent, west, and southwest were considered for the initial study area (Reeves and Carroll 1994a). The Black Mesa region in northwestern Arizona is shown on the U.S. Geological Survey 1995 oil and gas map of the United States as an undrilled area, adapted from Takahashi and Gautier 1995. This basin was selected by DOE s the site for the initial NIPER-BDM survey to develop prospects within the Lower-48 states (Reeves and Carroll 1994b).

Barker, Colin; Carroll, Herbert; Erickson, Richard; George, Steve; Guo, Genliang; Reeves,T.K.; Sharma, Bijon; Szpakiewicz, Michael; Volk, Len

1999-04-27

263

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

Microsoft Academic Search

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

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

2004-01-01

264

The Middle East.  

ERIC Educational Resources Information Center

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,…

Blouin, Virginia; And Others

265

14. View of interior, north and east walls featuring sink, ...  

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

14. View of interior, north and east walls featuring sink, facing east (Note: B/W scale on wall in foreground is in 1/2 ft increments) - Nevada Test Site, Reactor Maintenance & Disassembly Complex, Junior Hot Cell, Jackass Flats, Area 25, South of intersection of Roads F & G, Mercury, Nye County, NV

266

Stratigraphic revision and depositional environments of the Upper Cretaceous Toreva Formation in the northern Black Mesa area, Navajo and Apache counties, Arizona  

SciTech Connect

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.

Franczyk, K.J.

1988-01-01

267

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

PubMed

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

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

268

View of EPA Farm Sioux silo, facing east. Radsafe trailer ...  

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

View of EPA Farm Sioux silo, facing east. Rad-safe trailer is to the left - Nevada Test Site, Environmental Protection Agency Farm, Silo Type, Area 15, Yucca Flat, 10-2 Road near Circle Road, Mercury, Nye County, NV

269

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

270

2. Relationship of claim house, residence, east tool shed, and ...  

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

2. Relationship of claim house, residence, east tool shed, and garage to overall farmstead site, looking north - George Spangerberger Farmstead, 2012 West Illinois Avenue, South Hutchinson, Reno County, KS

271

6. RElationship of residence, claim house, east tool shed, barn, ...  

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

6. RElationship of residence, claim house, east tool shed, barn, garage, and pole building to overall farmstead site, looking northwest - George Spangerberger Farmstead, 2012 West Illinois Avenue, South Hutchinson, Reno County, KS

272

1. Relationship of chicken house, claim house, residence, east tool ...  

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

1. Relationship of chicken house, claim house, residence, east tool shed, garage, and barn to overall farmstead site, looking north - George Spangerberger Farmstead, 2012 West Illinois Avenue, South Hutchinson, Reno County, KS

273

4. EXTERIOR VIEW TO THE EAST OF THE WEST ELEVATION ...  

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

4. EXTERIOR VIEW TO THE EAST OF THE WEST ELEVATION OF THE COLD ASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

274

15. INTERIOR VIEW TO THE EAST OF ROOM 102, A ...  

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

15. INTERIOR VIEW TO THE EAST OF ROOM 102, A MACHINE SHOP ADJACENT TO ASSEMBLY BAY NO. 1. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

275

8. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION ...  

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

8. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION OF THE HOT DISASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

276

10. VIEW WITHIN THE EAST OPERATING GALLERY OF WORK STATION ...  

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

10. VIEW WITHIN THE EAST OPERATING GALLERY OF WORK STATION WITH MANIPULATOR ARMS. - Nevada Test Site, Engine Maintenance Assembly & Disassembly Facility, Area 25, Jackass Flats, Mercury, Nye County, NV

277

16. VIEW OF FIRST FLOOR EAST OPERATING GALLERY. NOTE THE ...  

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

16. VIEW OF FIRST FLOOR EAST OPERATING GALLERY. NOTE THE SERIES OF MANIPULATOR ARMS ALONG THE LEFT WALL. - Nevada Test Site, Engine Maintenance Assembly & Disassembly Facility, Area 25, Jackass Flats, Mercury, Nye County, NV

278

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

279

28. ELEVATION LOOKING EAST, ORIGINAL MARCONI ANTENNA POLES WERE 300' ...  

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

28. ELEVATION LOOKING EAST, ORIGINAL MARCONI ANTENNA POLES WERE 300' TALL (AT LEAST TWICE THE HEIGHT OF THOSE APPEARING IN PICTURE). - Marconi Radio Sites, Transmitting, Point Reyes Station, Marin County, CA

280

View of EPA Farm metal weather tower, facing east, showing ...  

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

View of EPA Farm metal weather tower, facing east, showing thirty-acre irrigated field - Nevada Test Site, Environmental Protection Agency Farm, Weather Tower, Area 15, Yucca Flat, 10-2 Road near Circle Road, Mercury, Nye County, NV

281

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

282

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

USGS Publications Warehouse

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 (R2 = 0.65, p 2 ? 0.99) for all eight sampling dates except one where R2 = 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.

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

2014-01-01

283

The MESA polarimetry chain and the status of its double scattering polarimeter  

SciTech Connect

We plan to have two independent polarimetry systems at MESA based on totally different physical processes. A first one tries to minimize the systematic uncertainties in double polarized Mo/ller scattering, which is to be achieved by stored hydrogen atoms in an atomic trap (Hydro-Mo/ller-Polarimeter). The other one relies on the equality of polarizing and analyzing power which allows to measure the effective analyzing power of a polarimeter with very high accuracy. Since the status of Hydro-Mo/ller is presented in a separate paper we concentrate on the double scattering polarimeter in this article.

Aulenbacher, K.; Bartolomé, P. Aguar; Molitor, M.; Tioukine, V. [Institut für Kernphysik, Johannnes-Gutenberg-Universität Mainz (Germany)

2013-11-07

284

Shuttle crew escape systems (CES) rocket test at Hurricane Mesa, Utah  

NASA Technical Reports Server (NTRS)

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.

1987-01-01

285

Cutoff-mesa isolated rib optical waveguide for III-V heterostructure photonic integrated circuits  

DOEpatents

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.

Vawter, Gregory A. (Albuquerque, NM); Smith, Robert E. (Albuquerque, NM)

1998-01-01

286

Cutoff-mesa isolated rib optical waveguide for III-V heterostructure photonic integrated circuits  

DOEpatents

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.

Vawter, G.A.; Smith, R.E.

1998-04-28

287

Thoughts Regarding the Dimensions of Faults at Rainier and Aqueduct Mesas, Nye County, Nevada, Based on Surface and Underground Mapping  

SciTech Connect

The geologic setting and history, along with observations through 50 years of detailed geologic field work, show that large-displacement (i.e., greater than 30 meters of displacement) syn- to post-volcanic faults are rare in the Rainier Mesa area. Faults observed in tunnels and drill holes are mostly tight, with small displacements (most less than 1.5 meters) and small associated damage zones. Faults are much more abundant in the zeolitized tuffs than in the overlying vitric tuffs, and there is little evidence that faults extend downward from the tuff section through the argillic paleocolluvium into pre-Tertiary rocks. The differences in geomechanical characteristics of the various tuff lithologies at Rainier Mesa suggest that most faults on Rainer Mesa are limited to the zeolitic units sandwiched between the overlying vitric bedded tuffs and the underlying pre-Tertiary units (lower carbonate aquifer–3, lower clastic confining unit–1, and Mesozoic granite confining unit).

Drellack, S.L.; Prothro, L.B.; Townsend, M.J.; Townsend, D.R.

2011-02-01

288

77 FR 21805 - Notice of Intent To Collect Fees on Public Land in Mesa County, CO (Ruby-Horsethief Stretch of...  

Federal Register 2010, 2011, 2012, 2013

...Fees on Public Land in Mesa County, CO (Ruby-Horsethief Stretch of the Colorado River...collecting fees for overnight camping on the Ruby-Horsethief stretch of the Colorado River...State Line, Mesa County, Colorado. The Ruby-Horsethief stretch of the Colorado...

2012-04-11

289

VARIAÇÃO NAS CARACTERÍSTICAS FÍSICAS E QUÍMICAS DA ÁGUA DO RIO TOCANTINS A JUSANTE DA USINA HIDRELÉTRICA SERRA DA MESA (GO), EM DIFERENTES ÉPOCAS DO ANO  

Microsoft Academic Search

RESUMO O presente trabalho objetivou estudar a avaliação das características físicas e químicas das águas do rio Tocantins (TO), a jusante da UHE Serra da Mesa, nas épocas seca e chuvosa. Os dados foram coletados junto ao Projeto de Monitoramento Limnológico do rio Tocantins a jusante da UHE Serra da Mesa, como integrante de um convênio firmado entre Universidade do

Daniela Alves Oliveira; Ricardo H. P. B. Peixoto; Cleverland Carvalho de Araújo; Oliveira Barros; Ana Márcia; Fernandes da Cruz

290

Geologic surface effects of underground nuclear testing, Yucca Flat, Nevada Test Site, Nevada  

SciTech Connect

This report presents a new Geographic Information System composite map of the geologic surface effects caused by underground nuclear testing in the Yucca Flat Physiographic Area of the Nevada Test Site, Nye County, Nevada. The Nevada Test Site (NTS) was established in 1951 as a continental location for testing nuclear devices (Allen and others, 1997, p.3). Originally known as the ''Nevada Proving Ground'', the NTS hosted a total of 928 nuclear detonations, of which 828 were conducted underground (U.S. Department of Energy, 1994). Three principal testing areas of the NTS were used: (1) Yucca Flat, (2) Pahute Mesa, and (3) Rainier Mesa including Aqueduct Mesa. Underground detonations at Yucca Flat and Pahute Mesa were typically emplaced in vertical drill holes, while others were tunnel emplacements. Of the three testing areas, Yucca Flat was the most extensively used, hosting 658 underground tests (747 detonations) located at 719 individual sites (Allen and others, 1997, p.3-4). Figure 1 shows the location of Yucca Flat and other testing areas of the NTS. Figure 2 shows the locations of underground nuclear detonation sites at Yucca Flat. Table 1 lists the number of underground nuclear detonations conducted, the number of borehole sites utilized, and the number of detonations mapped for surface effects at Yucca Flat by NTS Operational Area.

Grasso, D.N.

2000-05-31

291

Middle East Research and Information Project  

NSDL National Science Digital Library

Established 32 years ago, the Middle East Research and Information Project (MERIP) is a non-profit, non-governmental organization based in Washington, DC. The Project has been quite successful over the past few decades due to its commitment to providing a broad range of perspectives on the Middle East not generally found in some of the mainstream media and press coverage. While the organization's primary publication, the Middle East Report, is not available for free on the site (although some of its editorial pieces are), visitors will want to take a close look at the Middle East Report Online, which is available here. Recent features within the online report deal with the future of Middle East studies in American universities, ethnic unrest in Iraq, and the long-standing dispute over Western Sahara. For visitors interested in a particular subject, there is a subject index of articles, and a feature that allows interested parties to sign up to receive the online reports via email.

292

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

NASA Astrophysics Data System (ADS)

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.

Flores, Ramon

293

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  

Microsoft Academic Search

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

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

2004-01-01

294

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.

295

East Traffic Circle Landfill closure report  

SciTech Connect

This report presents the results of the investigation and cleanup of the East Traffic Circle Landfill (ETCL), an inactive landfill located in the east-central portion of the main site of Lawrence Livermore National Laboratory. The old landfill site was uncovered by construction workers during utility-line trenching on July 19, 1984. The uncovered debris was surveyed with radiation detection instruments, showed no radioactivity, and was found to consist primarily of metal shavings and broken bottles. An initial soil sample was taken and analyzed for metals and volatile organic compounds. Only copper, lead, and zinc were detected in some samples at levels exceeding the state hazardous waste designations. Shallow soils generally showed little (less than 0.1 ppM) volatile halogenated and non-halogenated volatile organic chemical contamination; however, a sample collected beneath 20 partially crushed metal drums showed 11 ppM of trichloroethylene (TCE) and 50 ppM of tetrachloroethylene (PCE). Soils from 21 to 51 feet beneath the drums showed TCE and PCE concentrations approaching 1 ppM each. The East Traffic Circle Landfill area was generally excavated to a depth of 5 to 7 feet below grade and to 10 or more feet in the vicinity of 160-plus capacitors. The 13,971 cubic yards of excavated soil and debris were hauled from the LLNL site by registered haulers and disposed of at state-permitted hazardous waste disposal sites. Construction activities resumed in the area after the landfill was backfilled.

McConachie, W.A.; Como, J.P.; Carpenter, D.W.; Ragaini, R.C.

1986-01-31

296

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

SciTech Connect

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.

NSTec Environmental Management

2010-12-01

297

Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative  

SciTech Connect

Pahute Mesa–Oasis Valley (PM-OV) Phase II drilling will occur within an area that encompasses approximately 117 square kilometers (45 square miles) near the center of the Phase I PM-OV hydrostratigraphic framework model area. The majority of the investigation area lies within dissected volcanic terrain between Pahute Mesa on the north and Timber Mountain on the south. This area consists of a complex distribution of volcanic tuff and lava of generally rhyolitic composition erupted from nearby calderas and related vents. Several large buried volcanic structural features control the distribution of volcanic units in the investigation area. The Area 20 caldera, including its structural margin and associated caldera collapse collar, underlies the northeastern portion of the investigation area. The southern half of the investigation area lies within the northwestern portion of the Timber Mountain caldera complex, including portions of the caldera moat and resurgent dome. Another significant structural feature in the area is the west-northwest-trending Northern Timber Mountain moat structural zone, which bisects the northern portion of the investigation area and forms a structural bench. The proposed wells of the UGTA Phase II drilling initiative can be grouped into four generalized volcanic structural domains based on the stratigraphic distribution and structural position of the volcanic rocks in the upper 1,000 meters (3,300 feet) of the crust, a depth that represents the approximate planned total depths of the proposed wells.

NSTec Environmental Restoration

2009-04-20

298

Exploring stellar evolution models of sdB stars using MESA  

E-print Network

Detection of g-mode pulsations in subdwarf B (sdB) stars allows a rare test of how well stellar evolution theory can predict the interior properties of stars. Asteroseismology suggests He-CO cores of the order of $\\sim 0.22-0.28\\,M_\\odot$, i.e.\\ $\\gtrsim$ 40\\,\\% of the total stellar mass. Using mixing-length theory (MLT) without convective overshoot produces significantly smaller cores ($\\sim 0.1 M_\\odot$). We have used MESA (Modules for Experiments in Stellar Astrophysics) to explore how well stellar observational data can be reproduced by standard algorithms. Using the same parameters as previous investigators (not the MESA defaults), we show that our models can be made consistent with earlier sdB models in terms of timescales, qualitative evolutionary paths and position in the $\\log g - T_{\\rm{eff}}$ diagram. The sdB masses from our full stellar evolutionary sequences fall within the range of the empirical mass distribution of sdB stars, but are nearly always lower than the median. Also, the models are not...

Schindler, Jan-Torge; Arnett, W David

2014-01-01

299

A preliminary guidebook for identifying stratigraphic contacts at the Nevada Test Site  

SciTech Connect

Lithologic variation, regional depositional trends, and the lack of written guidelines have resulted in inconsistencies in the recognition of stratigraphic contacts in drill holes at the Nevada Test Site (NTS). Stratigraphic identification, based on mineralogy of discrete samples, can be augmented by geophysical logs and downhole movies to more accurately and consistently locate contacts between units. Criteria are established for locating the base of the Pahute Mesa ash-flow tuff, the top of the Ammonia Tanks ash-flow tuff, the top of the Ammonia Tanks bedded tuff, and the top and the base of the Rainier Mesa Tuff.

Pawloski, G.A.; McKague, H.L.; Wagoner, J.L. [Lawrence Livermore National Lab., CA (United States); McKinnis, W.B. [Lawrence Livermore National Lab., Mercury, NV (United States)

1992-01-01

300

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

301

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

302

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

303

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

304

Detail east panel of east truss showing rollling panels and ...  

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

Detail east panel of east truss showing rollling panels and counter weights. View south - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

305

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

306

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

307

Description and selection of soils at two oil shale disposal sites  

Microsoft Academic Search

This paper presents geologic soil descriptions of two oil shale areas selected for soil sampling. Soil samples are to be collected specifically from areas designated for spent shale disposal. One shale disposal site is the Colorado Rio Blanco lease tract C-a, 84 Mesa. The other area is adjacent to the Clegg Creek Member of the New Albany shale in southeast

McGowan

1985-01-01

308

13. View of south side of East Ward Street east ...  

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

13. View of south side of East Ward Street east of Sibett Avenue, facing southwest. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

309

2. View of north side of East Ward Street east ...  

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

2. View of north side of East Ward Street east of North Coweta Avenue, facing northeast. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

310

7. View of south side of East Ward Street east ...  

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

7. View of south side of East Ward Street east of South Coweta Avenue, facing southwest. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

311

20. View of south side of East Ward Street east ...  

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

20. View of south side of East Ward Street east of South McDonald Avenue, facing southeast. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

312

17. View of north side of East Ward Street east ...  

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

17. View of north side of East Ward Street east of North McDonald Avenue, facing northwest. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

313

CONSTRUCTION SITES CONSTRUCTION SITE  

E-print Network

HERON NATATORIUM PILLING COMP SCI ENGR SOUTH UNIVERSITY HOUSE ORFALEA CHILDREN'S CTR ENGINEERING DEXTER.H.S. FACILITIES TRANSPORTATION DEXTER LAWN PARKING O'NEILL GREEN FORBES FAC OFC EL CORRAL BOOKSTORE SIMPSON ENGR EAST FAC OFC EAST VISTA GRANDE STUDENT SERVICES CHASE JESPERSEN HERON NATATORIUM PILLING COMP SCI

Sze, Lawrence

314

Ground-water, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona--2003-04  

USGS Publications Warehouse

The N aquifer is the major source of water in the 5,400-square-mile area of Black Mesa in northeastern Arizona. Availability of water is an important issue in this area because of continued industrial and municipal use, a growing population, and precipitation of about 6 to 14 inches per year. The monitoring program in the Black Mesa area has been operating since 1971 and is designed to determine the long-term effects of ground-water withdrawals from the N aquifer for industrial and municipal uses. The monitoring program includes measurements of (1) ground-water pumping, (2) ground-water levels, (3) spring discharge, (4) surface-water discharge, (5) ground-water chemistry, and (6) periodic testing of ground-water withdrawal meters. In 2003, total ground-water withdrawals were 7,240 acre-feet, industrial withdrawals were 4,450 acre-feet, and municipal withdrawals were 2,790 acre-feet. From 2002 to 2003, total withdrawals decreased by 10 percent, industrial withdrawals decreased by 4 percent, and municipal withdrawals decreased by 20 percent. Flowmeter testing was completed for 24 municipal wells in 2004. The median difference between pumping rates for the permanent meter and a test meter for all the sites tested was -2.9 percent. Values ranged from -10.9 percent at Forest Lake NTUA 1 to +7.8 percent at Rough Rock NTUA 2. From 2003 to 2004, water levels declined in 6 of 12 wells in the unconfined part of the aquifer, and the median change was -0.1 foot. Water levels declined in 7 of 11 wells in the confined part of the aquifer, and the median change was -2.7 feet. From the prestress period (prior to 1965) to 2003, the median water-level change for 26 wells was -23.2 feet. Median water-level change were -6.1 feet for 14 wells in the unconfined parts of the aquifer and and -72.1 feet for 12 wells in the confined part. Discharges were measured once in 2003 and once in 2004 at four springs. Discharge stayed the same at Pasture Canyon Spring, increased 9 percent at Moenkopi Spring, decreased 26 percent at an unnamed spring near Dennehotso, and decreased 50 percent at Burro Spring. For the past 12 years, discharges from the four springs have fluctuated; however, an increasing or decreasing trend is not apparent. Continuous records of surface-water discharge have been collected from 1976 to 2003 at Moenkopi Wash, 1996 to 2003 at Laguna Creek, 1993 to 2003 at Dinnebito Wash, and 1994 to 2003 at Polacca Wash. Median flows for November, December, January, and February of each water year were used as an index of ground-water discharge to those streams. Since 1995, the median winter flows have decreased for Moenkopi Wash, Dinnebito Wash, and Polacca Wash. Since the first continuous record of surface-water discharge in 1997, there is no consistent trend in the median winter flow for Laguna Creek. In 2004, water samples were collected from 12 wells and 4 springs and analyzed for selected chemical constituents. Dissolved-solids concentrations ranged from 100 to 649 milligrams per liter. Water samples from 11 of the wells and from all the springs had less than 500 milligrams per liter of dissolved solids. There are no appreciable time trends in the chemistry of water samples from 7 wells and 2 springs; increasing trends in dissolved-solids and chloride concentrations were evident from the more than 10 years of data for 2 springs.

Truini, Margot; Macy, Jamie P.; Porter, Thomas J.

2005-01-01

315

East Texas Storytellers.  

ERIC Educational Resources Information Center

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…

Anderson, Brandi, Ed.

1987-01-01

316

Peacebuilding in East Timor  

Microsoft Academic Search

This essay analyses some of the political, economic and social challenges of East Timor's transition to independence. It scrutinizes the ethical dimensions of building peace in a territory devastated by the combined effect of Indonesia's colonial occupation and the violent militia attacks of September 1999. The most difficult task ahead does not lie in the physical rebuilding of the territory

Patrick Candio; Roland Bleiker

2001-01-01

317

East Alumni Ave. Horticulture  

E-print Network

. Soccer Lacrosse Football PlainsRd. N 5 5 5 48 9 22 83 136 14 106 127 100 13 27 47 135 41 39 58 44 128 101, aquaculture and pathology (off Rte. 108) * East Hall, physics 34 (B5) * Edwards Hall 35 (C5) * Episcopal) * Independence Hall 54 (C5) * Independence Square II, physical therapy, speech and hearing clinic 138 (E1

Vetter, Frederick J.

318

Understanding the Middle East.  

ERIC Educational Resources Information Center

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…

Owen, Evelyn C.

319

4. OVERALL VIEW OF MINE SITE, SHOWING MINE CAR TRACKS, ...  

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

4. OVERALL VIEW OF MINE SITE, SHOWING MINE CAR TRACKS, SNOWSHEDS AND TIPPLE (LEFT BACKGROUND). VIEW TO EAST. - Park Utah Mining Company: Keetley Mine Complex, 1 mile East of U.S. 40 at Keetley, Heber City, Wasatch County, UT

320

1. Pamorana of Daniel F. Waters Germantown Dye Works site ...  

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

1. Pamorana of Daniel F. Waters Germantown Dye Works site (with the former Hinckley Knitting Mills in the foreground) from Germantown Avenue looking east. - Daniel F. Waters Germantown Dye Works, 37-55 East Wister Street, Philadelphia, Philadelphia County, PA

321

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.

322

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)

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

Panseri, M.

2009-04-01

323

Common base amplifier with 7 - dB gain at 176 GHz in InP mesa DHBT technology  

NASA Technical Reports Server (NTRS)

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.

Samoska, Lorene; Paidi, V.; Griffith, Z.; Dahlstrom, M.; Wei, Y.; Urteaga, M.; Rodell, M. J. W.; Fung, A.

2004-01-01

324

ASME/IEEE MESA 2011 The 7th International ASME/IEEE Conference on Mechatronics & Embedded Systems & Applications  

E-print Network

:20AMMESA-1-1FractionalDy- namicsandFractionalDif- ferentialEquations MESA-1-4AppliedFrac- tional and Fractional Differential Equations Session Schedule: Monday, August 29, 2011 08:40 AM-10:20 AM Session Chair Polit`ecnica de Catalunya) The Solution of Linear Fractional Differential Equations Using the Fractional

Cheng, Harry H.

325

Avignon,MesaVerde, andCather's T Th hee P Prro offeesssso orr''ss H Ho ou ussee  

Microsoft Academic Search

T he fascination for Southwestern mesas in Archbishop Jean La - tour's recognition of their resemblance to Gothic cathedrals in Death Comes for the Archbishop(1927)canbetracedtothearchitec - ture and topography Willa Cather herself appreciated during her visit to Europe in 1902, ten years before her introduction to the American Southwest (99). In Paris the \\

John J. Murphy

326

Predicting and mitigating weed invasions to restore natural post-fire succession in Mesa Verde National Park, Colorado, USA  

Microsoft Academic Search

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

M. Lisa FloydA; David HannaA; William H. RommeB; Timothy E. CrewsA

2006-01-01

327

A COMPARISON OF THE MESA-PUGET SOUND OIL SPILL MODEL WITH WIND AND CURRENT OBSERVATIONS FROM AUGUST 1978  

EPA Science Inventory

This report compares the winds and currents observed in August, 1978 in the Strait of Juan de Fuca with simulated wind and current fields taken from the MESA-Puget Sound oil spill model. This model is described in a companion report, Pease (1980). A method is developed for relati...

328

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

329

Digital Geologic Map of the Nevada Test Site and Vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

This digital geologic map of the Nevada Test Site (NTS) and vicinity, as well as its accompanying digital geophysical maps, are compiled at 1:100,000 scale. The map compilation presents new polygon (geologic map unit contacts), line (fault, fold axis, metamorphic isograd, dike, and caldera wall) and point (structural attitude) vector data for the NTS and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California. The map area covers two 30 x 60-minute quadrangles-the Pahute Mesa quadrangle to the north and the Beatty quadrangle to the south-plus a strip of 7.5-minute quadrangles on the east side-72 quadrangles in all. In addition to the NTS, the map area includes the rest of the southwest Nevada volcanic field, part of the Walker Lane, most of the Amargosa Desert, part of the Funeral and Grapevine Mountains, some of Death Valley, and the northern Spring Mountains. This geologic map improves on previous geologic mapping of the same area (Wahl and others, 1997) by providing new and updated Quaternary and bedrock geology, new geophysical interpretations of faults beneath the basins, and improved GIS coverages. Concurrent publications to this one include a new isostatic gravity map (Ponce and others, 1999) and a new aeromagnetic map (Ponce, 1999).

Slate, Janet L.; Berry, Margaret E.; Rowley, Peter D.; Fridrich, Christopher J.; Morgan, Karen S.; Workman, Jeremiah B.; Young, Owen D.; Dixon, Gary L.; Williams, Van S.; McKee, Edwin H.; Ponce, David A.; Hildenbrand, Thomas G.; Swadley, W. C.; Lundstrom, Scott C.; Ekren, E. Bartlett; Warren, Richard G.; Cole, James C.; Fleck, Robert J.; Lanphere, Marvin A.; Sawyer, David A.; Minor, Scott A.; Grunwald, Daniel J.; Laczniak, Randell J.; Menges, Christopher M.; Yount, James C.; Jayko, Angela S.

1999-01-01

330

Russian and East European Studies  

E-print Network

complementary for Russian, political science, economics, history, geography, journalism, global studiesRussian and East European Studies Certificate About Us The Russian and East European Studies (REES a Russian and East European Certificate would be valu- able include print and broadcast journalism, civil

Saldin, Dilano

331

EAST ASIAN STUDIES CURRICULUM COMMITTEE  

E-print Network

, the curriculum extends that focus across the East Asian region to Japan, and across multiple disciplinaryEAST ASIAN STUDIES CURRICULUM COMMITTEE: David McConnell (Anthropology), Chair Mark Graham (Religious Studies) Setsuko Matsuzawa (Sociology) Rujie Wang (Chinese) The East Asian Studies major and minor

Wilson, Mark A.

332

EAST ASIAN STUDIES CURRICULUM COMMITTEE  

E-print Network

and history, the curriculum extends that focus across the East Asian region to Japan, and across mul- tipleEAST ASIAN STUDIES CURRICULUM COMMITTEE: David McConnell (Anthropology), Chair Mark Graham (Religious Studies) Setsuko Matsuzawa (Sociology) Margaret Ng (History) Rujie Wang (Chinese) The East Asian

Wilson, Mark A.

333

Oak Ridge Reservation Annual Site  

E-print Network

Oak Ridge Reservation Annual Site Environmental Report DOE/ORO/2445 2012 #12;Cover Image Jeff Riggs Annual Site Environmental Report 2012 #12;DOE/ORO/2445 Oak Ridge Reservation Annual Site Environmental Complex Oak Ridge National Laboratory East Tennessee Technology Park Electronic publisher Editors Graphic

Pennycook, Steve

334

MIDDLE EAST STUDIESMIDDLE EAST STUDIESMIDDLE EAST STUDIES This interdisciplinary major draws courses from Anthropology, Classics,  

E-print Network

in Media and Religion to develop a comprehensive research and training program to prepare students attention to their influence on the Bible. #12;MIDDLE EAST STUDIESMIDDLE EAST STUDIESMIDDLE EAST STUDIES Requirements (select seven; six must be upper division)** ANTH 335: Comparative Muslim Societies ECON 322

Krylov, Anna I.

335

Micromachining of mesa and pyramidal-shaped objects in (1 0 0) InP substrates  

NASA Astrophysics Data System (ADS)

Generally oriented mesas and pyramidal-shaped objects were patterned in (1 0 0) InP substrate by etching in 3HCl:1H3PO4 at (16 ± 0.05) °C through convex InGaAs mask patterns. The mesas were revealed through long (~2 mm) parallelogram-shaped mask strips whose long edges lay between [0 1 1] and [0\\,\\bar{1} \\,1] at a variable angle ?, with ? ? 0° at [0 1 1]. The mesas were re-entrant for ? epsi [0°, 45°) and ordinary for ? epsi (45°, 90°]. The tilt of mesa side facets ? and the associated mask underetching rates were evaluated using SEM, AFM and optical microscopy. The underetching rate was zero at ? = 0° and 90°. With |(? - 45°)| ? 0° it increased asymmetrically about [0 0 1]: for |(?1 - 45°)| = |(?2 - 45°)| it was higher at ?1 < 45° than at ?2 > 45°. At ? = 45.5° ordinary (1 1 0)- and (1\\,\\bar{1}\\,0) -related facets, tilted at ? ap 45°, were revealed at a rate of (310.1 ± 8.1) nm min-1. Likewise at ? = 45.5° off [0 1 1] to [0\\,1\\,\\bar{1}] (1 0 1)- and (1\\,0\\,\\bar{1}) -related facets formed. In theory, (1 1 0), (1\\,\\bar{1}\\,0) , (1 0 1) and (1\\,0\\,\\bar{1}) define a pyramidal shape with the sides tilted at 45° to (1 0 0). In practice, an object confined by facets related to (1 1 0), (1\\,\\bar{1}\\,0) , (1 0 1) and (1\\,0\\,\\bar{1}) cannot be revealed via a convex-cornered lozenge-shaped pattern with the edges at ? = 45.5° and diagonals parallel with [0 1 1] and [0\\,1\\,\\bar{1}] because the 'pyramidal' facets are suppressed by fast-etching re-entrant facets that form at the [0\\,1\\,\\bar{1}] - and [0\\,\\bar{1} \\,1] -oriented corners. If compensated with e.g. rectangular strips, the pyramidal facets can be revealed at the lozenge edges. Etch-stop (2 1 1)A-related facets were formed along the compensation strip edges and fast-etching re-entrant facets at the convex corners of the compensation strips. The angular orientation of the pyramidal facets slightly shifted with etching time: the normal vector of the top pyramidal facet edge deviated off lang0 0 1rang towards [0 1 1] or [0\\,\\bar{1}\\, \\bar{1}] from (1.13 ± 0.14)° at tetch = 2 min to (2.32 ± 0.10)° at tetch = 10 min. Concurrently, the tilt of the 'pyramidal' facets ? to (1 0 0) decreased from (45.35 ± 0.04)° for tetch = 2 min to (44.16 ± 0.06)° for tetch = 10 min.

Eliás, P.; Martaus, J.; Soltýs, J.; Kostic, I.

2005-05-01

336

East Siberian Sea, Russia  

NASA Technical Reports Server (NTRS)

The winter sea ice in the east Siberian Sea is looking a bit like a cracked windshield in these true-color Moderate Resolution Imaging Spectroradiometer (MODIS) images from June 16 and 23, 2002. North of the thawing tundra, the sea ice takes on its cracked, bright blue appearance as it thins, which allows the reflection of the water to show through. Numerous still-frozen lakes dot the tundra. Credit: Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC

2002-01-01

337

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.

338

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

NASA Astrophysics Data System (ADS)

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 K and enriched in Si. In addition to the amorphous layer, the feldspar surfaces are also partially coated with tightly adhered kaolin platelets. Outside of the kaolin coatings, feldspar grains are covered with a continuous 3-5 ?m thick layer of authigenic smectite, which also coats quartz and other sediment grains. Authigenic K-feldspar overgrowth and etch pits were also found on feldspar grains. These characteristics of the aged feldspar surfaces accentuate the differences in reactivity between the freshly ground feldspar powders used in laboratory experiments and feldspar grains in natural systems, and may partially contribute to the commonly observed apparent laboratory-field dissolution rate discrepancy. At Black Mesa, feldspars in the Navajo Sandstone are dissolving at ˜10 5 times slower than laboratory rate at comparable temperature and pH under far from equilibrium condition. The tightly adhered kaolin platelets reduce the feldspar reactive surface area, and the authigenic K-feldspar overgrowth reduces the feldspar reactivity. However, the continuous smectite coating layer does not appear to constitute a diffusion barrier. The exact role of the amorphous layer on feldspar dissolution kinetics depends on the origin of the layer (leached layer versus re-precipitated silica), which is uncertain at present. However, the nanometer thin layer can be detected only with HRTEM, and thus our study raises the possibility of its wide occurrence in geological systems. Rate laws and proposed mechanisms should consider the possibility of this amorphous layer on feldspar surface.

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

2006-09-01

339

Bilayer graphene grown on 4H-SiC (0001) step-free mesas.  

PubMed

We demonstrate the first successful growth of large-area (200 × 200 ?m(2)) bilayer, Bernal stacked, epitaxial graphene (EG) on atomically flat, 4H-SiC (0001) step-free mesas (SFMs) . The use of SFMs for the growth of graphene resulted in the complete elimination of surface step-bunching typically found after EG growth on conventional nominally on-axis SiC (0001) substrates. As a result heights of EG surface features are reduced by at least a factor of 50 from the heights found on conventional substrates. Evaluation of the EG across the SFM using the Raman 2D mode indicates Bernal stacking with low and uniform compressive lattice strain of only 0.05%. The uniformity of this strain is significantly improved, which is about 13-fold decrease of strain found for EG grown on conventional nominally on-axis substrates. The magnitude of the strain approaches values for stress-free exfoliated graphene flakes. Hall transport measurements on large area bilayer samples taken as a function of temperature from 4.3 to 300 K revealed an n-type carrier mobility that increased from 1170 to 1730 cm(2) V(-1) s(-1), and a corresponding sheet carrier density that decreased from 5.0 × 10(12) cm(-2) to 3.26 × 10(12) cm(-2). The transport is believed to occur predominantly through the top EG layer with the bottom layer screening the top layer from the substrate. These results demonstrate that EG synthesized on large area, perfectly flat on-axis mesa surfaces can be used to produce Bernal-stacked bilayer EG having excellent uniformity and reduced strain and provides the perfect opportunity for significant advancement of epitaxial graphene electronics technology. PMID:22352833

Nyakiti, L O; Myers-Ward, R L; Wheeler, V D; Imhoff, E A; Bezares, F J; Chun, H; Caldwell, J D; Friedman, A L; Matis, B R; Baldwin, J W; Campbell, P M; Culbertson, J C; Eddy, C R; Jernigan, G G; Gaskill, D K

2012-04-11

340

East Asian observations  

NASA Astrophysics Data System (ADS)

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.

Stephenson, F. R.

341

Oceanography of East Madagascar  

NASA Astrophysics Data System (ADS)

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.

Bemiasa, John

2014-05-01

342

Siting study for a consolidated waste capability at Los Alamos National Laboratory  

SciTech Connect

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.

Booth, Steven Richard [Los Alamos National Laboratory

2010-11-05

343

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

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.

Drici, Warda

2003-08-01

344

Evaluation of a method for measurement of black carbon particles suspended in rainwater and its application to long-term measurement at a remote site in the East China Sea  

NASA Astrophysics Data System (ADS)

Black carbon (BC) aerosols are produced by incomplete combustion of fossil fuels and biomass. They contribute to global warming due to their strong absorption of solar radiation. The distribution of BC is controlled by emission, transport, and wet deposition during transport. Therefore, BC concentration in rainwater is an important parameter for understanding of the detailed processes of wet deposition of BC. Reliable data of wet deposition flux of BC is useful in validating representation of the removal processes by three-dimensional models used for assessing the impacts of BC on climate. In this study, we make detailed evaluations of a method of measuring the mass concentration and size distribution of BC particles suspended in rainwater, and then we show the results of its application to long-term measurement of wet deposition flux of BC at Cape Hedo on Okinawa Island, Japan, in the East China Sea. The method utilizes an ultrasonic nebulizer and a laser-induced incandescence technique for BC detection (Single Particle Soot Photometer: SP2). First, the rainwater sample is transferred to an ultrasonic nebulizer by a peristaltic pump at a constant flow rate. In the ultrasonic nebulizer, some fraction of the introduced rainwater is converted to small droplets in air flow, and they are dried at the downstream. Remaining non-volatile cores of individual droplets are then introduced into the SP2 for single-particle detections of BC. In order to determine the fraction of BC mass transferred into the SP2, we used carbon black AquaBlack001 and AquaBlack162 (Tokai Carbon Co. Ltd.). We determined the fraction R to be about 11% by using samples of various BC concentrations. The R value was almost independent of BC mass concentration and concentrations of other co-existing solutes. The volume of rainwater required for reliable BC measurement is less than 5 mL. We analyzed rainwater samples collected at Cape Hedo on Okinawa Island, Japan, in the East China Sea from April 2010 to March 2011. Total wet deposition of BC during this period was measured to be 54 mg m-2, and about 76% of the total deposition was found to have occurred in April due to higher BC concentrations in rainwater and larger precipitation levels.

Ohata, S.; Moteki, N.; Kondo, Y.

2011-12-01

345

The effect of crustal structure on the regional phases Pg and Lg at the Nevada test site  

Microsoft Academic Search

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

B. W. Barker; Z. A. Der; C. P. Mrazek

1981-01-01

346

Drugs in East Germany.  

PubMed

Germany was divided into two parts after World War II. The closed border and a nonconvertible currency in the Eastern part were the factors that did not allow a drug market to develop. Alcohol and medicaments were used as substitute drugs. Since Germany was reunified 5 years ago, there are now the same conditions prevailing for the procurement and sale of drugs in East Germany as there are in the Western German states. This report describes the current state of drug traffic, especially in Saxony, under the new social conditions. PMID:9290882

Dressler, J; Müller, E

1997-09-01

347

East Africa continental margins  

SciTech Connect

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.

Bosellini, A.

1986-01-01

348

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

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.

Passchier, S.

2007-01-01

349

East African Rift Valley, Kenya  

NASA Technical Reports Server (NTRS)

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.

1990-01-01

350

Applications of Geophysical and Geological Techniques to Identify Areas for Detailed Exploration in Black Mesa Basin, Arizona  

SciTech Connect

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.

George, S.; Reeves, T.K.; Sharma, Bijon; Szpakiewicz, M.

1999-04-29

351

Large-area broad band saturable Bragg reflectors using oxidized AlAs in the circular and inverted mesa geometries  

NASA Astrophysics Data System (ADS)

A semiconductor Saturable Bragg Reflector (SBR) is a mirror structure comprising alternating layers of high and low refractive index materials with an incorporated saturable absorber. SBRs can be used to initiate and sustain ultra-short pulses in various laser systems. In order to form ultra-short pulses, SBRs with high reflectivity over a broad wavelength range are required. Furthermore, large-area SBRs facilitate easy integration in a laser cavity. One of the key elements for the realization of broad band SBRs is the development of the thermal oxidation process that creates buried low-index AlxOy layers over large areas. The design, fabrication, characterization, and implementation of broad band, high index contrast III-V/AlxOy SBRs in the form of circular mesas, as well as inverted mesa structures, is presented.

Nabanja, Sheila P.; Kolodziejski, Leslie A.; Petrich, Gale S.; Sander, Michelle Y.; Morse, Jonathan L.; Shtyrkova, Katia; Ippen, Erich P.; Kärtner, Franz X.

2013-04-01

352

Surface Characterization of 3C-SiC Mesa Heterofilms: Evidence for Growth by Edge/Corner Nucleation Mechanism  

NASA Technical Reports Server (NTRS)

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.

Trunek, Andrew J.; Neudeck, Philip G.; Spry, David J.; Powell, J. Anothny

2003-01-01

353

Physical activity and physiological cardiac remodelling in a community setting: the MultiEthnic Study of Atherosclerosis (MESA)  

Microsoft Academic Search

Objective:To evaluate the association of physical activity with left ventricular structure and function in the general population in a community setting.Design:Cross-sectional study.Setting:The Multi-Ethnic Study of Atherosclerosis (MESA), a population-based study of subclinical atherosclerosis.Participants:A multiethnic sample of 4992 participants (aged 45–84 years; 52% female) free of clinically apparent cardiovascular disease.Interventions:Physical activity induces beneficial physiological cardiac remodelling in a cross-sectional study of

E B Turkbey; N W Jorgensen; W C Johnson; A G Bertoni; J F Polak; A V Diez Roux; R P Tracy; J A C Lima; D A Bluemke

2010-01-01

354

Principal facts for new gravity stations in the Pahute Mesa and Oasis Valley areas, Nye County, Nevada  

SciTech Connect

Regional gravity and aeromagnetic maps of the Pahute Mesa and Oasis Valley region indicate the presence of several structures that may influence the flow of groundwater. For example, several prominent linear features expressed by both gravity and aeromagentic data could act either as barriers or conduits for groundwater. The current gravity study was undertaken to better define the boundaries of the interpreted major regional structures in the area.

Davidson, Jeffrey G.; Hildenbrand, Thoma G.; Mankinen, Edward A.; Roberts, Carter W.

1998-12-15

355

4. CONTEXTUAL VIEW OF DITCH OVERLOOKING THE GOULD RANCH SITE, ...  

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

4. CONTEXTUAL VIEW OF DITCH OVERLOOKING THE GOULD RANCH SITE, HIGHWAY 50'S OVERPASS FOR THE R/R & OLD PLACERVILLE ROAD ON LEFT. EAST BIDWELL STREET APPROACHES TO HIGHWAY 50 ON RIGHT; VIEW TO SOUTH. - Keefe-McDerby Mine Ditch, East of East Bidwell Street between Clarksville Road & Highway 50, Folsom, Sacramento County, CA

356

35. VIEW LOOKING EAST IN SOUTH END OF EAST BOILER ...  

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

35. VIEW LOOKING EAST IN SOUTH END OF EAST BOILER ROOM. CYLINDRICAL TANKS ARE WORTHINGTON DEAERATORS. THESE REMOVED AIR FROM BOILER FEED WATER TO MINIMIZE CORROSION AND PITTING OF THE BOILER TUBES. AIR REMOVAL ALSO HELPED AVOID THE FORMATION OF FOAM IN THE SYSTEM. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

357

Winter 2014 EAST 494: Special Topics: East Asian Studies 2  

E-print Network

Winter 2014 EAST 494: Special Topics: East Asian Studies 2 Internet, new media, and social change This course will explore the practices, phenomena, and theories of new media, Internet use, and social change and impacts of new media and Internet on social change and development in contemporary China. At the same time

Kambhampati, Patanjali

358

East Candor Chasma  

NASA Technical Reports Server (NTRS)

During its examination of Mars, the Viking 1 spacecraft returned images of Valles Marineris, a huge canyon system 5,000 km long, up to 240 km wide, and 6.5 km deep, whose connected chasma or valleys may have formed from a combination of erosional collapse and structural activity. The view shows east Candor Chasma, one of the connected valleys of Valles Marineris; north toward top of frame; for scale, the impact crater in upper right corner is 15 km (9 miles) wide. The image, centered at latitude 7.5 degrees S., longitude 67.5 degrees, is a composite of Viking 1 Orbiter high-resolution (about 80 m/pixel or picture element) images in black and white and low-resolution (about 250 m/pixel) images in color. The Viking 1 craft landed on Mars in July of 1976.

East Candor Chasma occupies the eastern part of the large west-northwest-trending trough of Candor Chasma. This section is about 150 km wide. East Candor Chasma is bordered on the north and south by walled cliffs, most likely faults. The walls may have been dissected by landslides forming reentrants; one area on the north wall shows what appears to be landslide debris. Both walls show spur-and-gully morphology and smooth sections. In the lower part of the image northwest-trending, linear depressions on the plateau are younger graben or fault valleys that cut the south wall.

Material central to the chasma shows layering in places and has been locally eroded by the wind to form flutes and ridges. These interior layered deposits have curvilinear reentrants carved into them, and in one locale a lobe flows away from the top of the interior deposit. The lobe may be mass-wasting deposits due to collapse of older interior deposits (Lucchitta, 1996, LPSC XXVII abs., p. 779- 780); this controversial idea requires that the older layered deposits were saturated with ice, perhaps from former lakes, and that young volcanism and/or tectonism melted the ice and made the material flow.

1997-01-01

359

Species composition and ecologo-phytocenotic spectra of vascular plants, mosses, and lichens on gold-mining sites in the taiga zone of the lower Amur River basin, the Russian Far East  

Microsoft Academic Search

Two-hundred-three species of vascular plants, 50 species of bryophyte and 41 species of lichens have been found on dredging\\u000a and hydraulic gold-mining sites in the taiga zone of the lower Amur River basin. The main features of the anthropogenic relief\\u000a and vegetation have been described. Dredging and hydraulic dumps are supposed to have the biggest similarity in the species\\u000a composition

S. V. Osipov; V. Ya. Cherdantseva; I. A. Galanina; V. V. Yakubov

2008-01-01

360

Experimental and Modelling Approaches for the Assessment of Chemical Impacts of Leachate Migration from Landfills: A Case Study of a Site on the Triassic Sandstone Aquifer in the UK East Midlands  

Microsoft Academic Search

Current risk-based methods for assessing the effects of landfill leachate migration on groundwater resources are conservative and generalised. Cost-effective and practical strategies are required which can robustly determine the potential for contaminant attenuation on a site-specific basis. In this paper laboratory column experiments and reactive transport modelling are evaluated as a combined approach for assessing the chem’ical impact of leachate

Steven F. Thornton; John H. Tellam; David N. Lerner

2005-01-01

361

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

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

Lackson T. Marufu; Russell R. Dickerson; Zhanqing Li; Tianxue Wen; Yuesi Wang; Pucai Wang; Hongbin Chen; Jeffrey W. Stehr

2007-01-01

362

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

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

Lackson T. Marufu; Russell R. Dickerson; Zhanqing Li; Tianxue Wen; Yuesi Wang; Pucai Wang; Hongbin Chen; Jeffrey W. Stehr

2007-01-01

363

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

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

2009-01-01

364

Educational Development in East Timor  

ERIC Educational Resources Information Center

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…

Millo, Yiftach; Barnett, Jon

2004-01-01

365

Educational development in East Timor  

Microsoft Academic Search

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 that was called for by Timorese leaders. This was

Yiftach Millo; Jon Barnett

2004-01-01

366

Can East Asia rise again?  

Microsoft Academic Search

In recent times, the economies of East Asia have been confronted by two major economic recessions, the first caused by the East Asian financial crisis, and the second by the slump in the ‘new economy.’ The causes of these two recessions, their scope and their influences differ significantly and during these periods of economic downturn the economies affected have adopted

Tzong-Shian Yu

2003-01-01

367

East Asian Security in 2025  

E-print Network

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... about Taiwan • Regional Sino-centric cooperation – The Middle Kingdom – Multilateral institutions Source: Scottish Geographical Magazine.,1896. East Asian Security in 2025 US Reaction: Engagement • Promote multilateralism – Security – Economic...

Heavin, Reagan; Hudson, Adam; Krueger, Brandon; O'Neil, Sean; Rozell, Griffin; Suma, Matt

2008-01-01

368

The East Asian Collection  

NSDL National Science Digital Library

The University of Wisconsin Digital Collections initiative continues to surprise and delight visitors to their collections. Their latest offering is certainly no different; it includes historical images that present a visual archive of 20th century East Asian cultural heritage. The collection is actually comprised of two subcollections, namely the Holmes Welch Collection and the China in the 30s Collection. Holmes Welch was a scholar of modern Chinese religions whose family donated his library of primary photographic materials of religious life in China and Hong Kong to the University of Wisconsin after he died in 1981. The China in the 1930s Collection contains a number of images connected with the military, which are mostly associated with the Japanese invasion of China and the Sino-Japanese Conflict.

369

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.

370

Mesa-size-dependent color contrast in flip-chip blue\\/green two-color InGaN\\/GaN multi-quantum-well micro-light-emitting diodes  

Microsoft Academic Search

The authors fabricate blue\\/green two-wavelength, InGaN\\/GaN quantum-well (QW), flip-chip micro-light-emitting diodes (mu-LEDs) of different mesa sizes by stacking QWs of different indium contents. It is found that the blue\\/green contrast ratio of such a mu-LED increases with the mesa size. The relatively stronger blue intensity in a device of a larger mesa area is due to its higher operation junction

Horng-Shyang Chen; Dong-Ming Yeh; Chih-Feng Lu; Chi-Feng Huang; Yen-Cheng Lu; Cheng-Yen Chen; Jian-Jang Huang; C. C. Yang

2006-01-01

371

Thoracic Aortic Distensibility and Thoracic Aortic Calcium (From the Multi-ethnic Study of Atherosclerosis [MESA])  

PubMed Central

Decreased arterial distensibility is an early manifestation of adverse structural and functional changes within the vessel wall. Its correlation with thoracic aortic calcium (TAC), a marker of atherosclerosis, has not been well demonstrated. We tested the hypothesis that decreasing aortic compliance and increasing arterial stiffness is independently associated with increased TAC. We included 3,540 (61±10 years, 46% males) subjects from the Multi-ethnic Study of Atherosclerosis (MESA) study who underwent aortic distensibility (AD) assessment on MRI. TAC was calculated using modified Agatston algorithm on non-contrast cardiac CT. Multivariate regression models were calculated for the presence of TAC. Overall, 861 (24%) individuals had detectable TAC. A lower AD was observed among those with vs. without TAC (2.02±1.34 vs. 1.28±0.74, p<0.0001). The prevalence of TAC increased significantly across decreasing quartiles of AD (7%, 17%, 31%, and 42%, p<0.0001). Using multivariate analysis, TAC was independently associated with AD after adjusting for age, gender, ethnicity and other covariates. In conclusion, our analysis demonstrates that increased arterial stiffness is associated with increased TAC independent of ethnicity and other atherosclerotic risk factors. PMID:20691319

Al-Mallah, Mouaz H.; Nasir, Khurram; Katz, Ronit; Takasu, Junichiro; Lima, Joao A.; Bluemke, David A.; Hundley, Gregory; Blumenthal, Roger S.; Budoff, Matthew J

2014-01-01

372

Characterization of GaAs mesa photodiodes with X-ray and ?-ray photons  

NASA Astrophysics Data System (ADS)

Results characterizing the performance of prototype thin (3 ?m i layer) GaAs p+-i-n+ mesa photodiodes (one 200 ?m diameter and one 400 ?m diameter device) are presented showing the spectral performance of the devices at photon energies from 4.95 keV (V K?1 X-ray fluorescence) to 59.5 keV (241Am ?-ray emission). The devices were operated uncooled at +33.3 °C. The energy resolution (full width half maximum) was measured to vary from 780 eV at 4.95 keV to 950 eV at 59.5 keV for the 200 ?m diameter diode, and from 1.08 keV at 4.95 keV to 1.33 keV at 59.5 keV for the 400 ?m diameter diode. The increased broadening of FWHM with increasing photon energy was found to be greater than can be explained by the expected energy dependence of the Fano noise, but the peak charge output from the devices varied linearly (R2200 ?m=0.99998, R2400 ?m=0.999998) with incident photon energy.

Barnett, A. M.

2014-08-01

373

Next generation population synthesis of accreting white dwarfs: I. Hybrid calculations using BSE + MESA  

E-print Network

Accreting, nuclear-burning white dwarfs have been deemed to be candidate progenitors of SNe Ia, and to account for supersoft X-ray sources, novae, etc. We have carried out a binary population synthesis (BPS) study of hydrogen-accreting WDs. First, we use the BPS code \\textsf{BSE} as a baseline for the commonly used "rapid" approach. Second, we apply a "hybrid" approach: we use \\textsf{BSE} to generate a population of WDs with non-degenerate companions on the verge of mass transfer. We then follow their evolution using the detailed stellar evolutionary code \\textsf{MESA}. We investigate the evolution of the number of rapidly accreting white dwarfs (RAWDs), stably nuclear-burning white dwarfs (SNBWDs), and the SNe Ia rate produced by "single-degenerate" systems (SD). The two algorithms differ significantly in the predicted numbers of SNBWDs at early and late times, and also in the delay time distribution (DTD) of SD SNe Ia. The differences in the treatment of mass transfer may partially account for differences ...

Chen, Hai-Liang; Yungelson, L R; Gilfanov, M; Han, Zhanwen

2014-01-01

374

Diarrhoea and effects of different water sources, sanitation and hygiene behaviour in East Africa  

Microsoft Academic Search

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

James K. Tumwine; John Thompson; Munguti Katua-Katua; Mark Mujwajuzi; Nick Johnstone; Elizabeth Wood; Ina Porras

2002-01-01

375

3. East and north elevations, facing southwest (Note: B/W scale ...  

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

3. East and north elevations, facing southwest (Note: B/W scale on east elevation in 1/2 ft increments) - Nevada Test Site, Reactor Maintenance & Disassembly Complex, Junior Hot Cell, Jackass Flats, Area 25, South of intersection of Roads F & G, Mercury, Nye County, NV

376

Why (not) go east? Comparison of findings from FDA Investigational New Drug study site inspections performed in Central and Eastern Europe with results from the USA, Western Europe, and other parts of the world  

PubMed Central

Since the mid-1990s, investigational sites in the countries of Central and Eastern Europe (CEE) have been increasingly utilized by pharmaceutical companies because of their high productivity in terms of patient enrolment into clinical trials. Based on the FDA’s publicly accessible Clinical Investigator Inspection List, we present an analysis of findings and outcome classifications from FDA inspections during Investigational New Drug (IND) studies and compare the results for the CEE region to those from Western European countries and the USA. Data from all 5531 FDA clinical trials inspections that occurred between 1994 (when the FDA first performed inspections in CEE) and the end of 2010 were entered into the database for comparative analysis. Of these, 4865 routine data audit (DA) inspections were analyzed: 401 from clinical trials performed in Western Europe, 230 in CEE, 3858 in the USA, and 376 in other countries. The average number of deficiencies per inspection ranged between 0.99 for CEE and 1.97 in Western Europe. No deficiencies were noted during 16.6%, 39.0%, and 21.5% of the inspections in Western Europe, CEE and USA, respectively. The percentages of inspections after which no follow-up action was indicated were 36.9% for Western Europe, 55.7% for CEE, and 44.3% for US sites. CEE was also the region with the lowest percentage of inspections that required official or voluntary action. On the basis of FDA inspection data, the high productivity of CEE sites appears to be accompanied by regulatory compliance as well as by data quality standards that are not inferior to those in Western regions. PMID:22563236

Caldron, Paul H; Gavrilova, Svetlana I; Kropf, Siegfried

2012-01-01

377

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

378

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

379

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

380

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

381

A Plio-Pleistocene hominid from Dmanisi, East Georgia, Caucasus  

Microsoft Academic Search

ARCHAEOLOGICAL excavations at the mediaeval site of Dmanisi (East Georgia) revealed that the town was built on a series of deposits yielding Late Villafranchian mammalian fossils and led to the discovery in late 1991 of a well preserved early human mandible. Dmanisi, where excavations are being carried out by a joint expedition of the Archaeological Research Centre of the Georgian

L. Gabunia; A. Vekua

1995-01-01

382

9. Closeup of open doors on west elevation, facing east ...  

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

9. Close-up of open doors on west elevation, facing east (Note: B/W scale in doorway is in 1/2 ft increments) - Nevada Test Site, Reactor Maintenance & Disassembly Complex, Junior Hot Cell, Jackass Flats, Area 25, South of intersection of Roads F & G, Mercury, Nye County, NV

383

17. INTERIOR VIEW TO THE EAST OF ROOM 215, A ...  

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

17. INTERIOR VIEW TO THE EAST OF ROOM 215, A SECOND FLOOR OFFICE ABOVE ROOM 137 IN THE COLD ASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

384

20. INTERIOR VIEW TO THE EAST OF THE ACCESS RAMP ...  

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

20. INTERIOR VIEW TO THE EAST OF THE ACCESS RAMP TO THE HOT DISASSEMBLY AREA FROM THE COLD ASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

385

6. INTERIOR VIEW TO THE EAST OF SOUTHEAST CORNER OF ...  

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

6. INTERIOR VIEW TO THE EAST OF SOUTHEAST CORNER OF THE HOT BAY. A LARGE MANIPULATOR ARM AND HORIZONTAL TRACKING SYSTEM IS SHOWN ABOVE SMALLER MANIPULATOR ARM WORK STATIONS. ASSOCIATED WITH THE WORK STATIONS ARE OBSERVATION WINDOWS. - Nevada Test Site, Engine Maintenance Assembly & Disassembly Facility, Area 25, Jackass Flats, Mercury, Nye County, NV

386

13. VIEW OF EAST OPERATING GALLERY ALONG THE POSTMORTEM CELLS. ...  

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

13. VIEW OF EAST OPERATING GALLERY ALONG THE POST-MORTEM CELLS. A NUMBER OF MANIPULATOR ARMS COVERED WITH PLASTIC ARE ON THE LEFT WALL. - Nevada Test Site, Engine Maintenance Assembly & Disassembly Facility, Area 25, Jackass Flats, Mercury, Nye County, NV

387

17. Photocopy of photograph. VIEW OF WORKERS IN EAST OPERATING ...  

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

17. Photocopy of photograph. VIEW OF WORKERS IN EAST OPERATING GALLERY USING MANIPULATOR ARMS AT STATION E-108. Photographer unknown, ca. 1965, original photograph and negative on file at the Remote Sensing Laboratory, Department of Energy, Nevada Operations Office. - Nevada Test Site, Engine Maintenance Assembly & Disassembly Facility, Area 25, Jackass Flats, Mercury, Nye County, NV

388

14. INTERIOR VIEW TO THE EAST OF EQUIPMENT IN ROOM ...  

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

14. INTERIOR VIEW TO THE EAST OF EQUIPMENT IN ROOM 3, FLOW CONTROL ROOM, BUILDING 3113/3113A. - Nevada Test Site, Test Cell A Facility, Test Cell A Building & Addition, Area 25, Jackass Flats, Road F, Mercury, Nye County, NV

389

General view of Sector Six Compound, looking east. Water Storage ...  

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

General view of Sector Six Compound, looking east. Water Storage Tank is at left - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Six Water Storage Plant, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

390

10. VIEW EAST (93 DEGREES) OF RCA COMMUNICATION RECEIVING STATION. ...  

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

10. VIEW EAST (93 DEGREES) OF RCA COMMUNICATION RECEIVING STATION. WOOD FRAMING SUPPORTED STANDOFF INSULATORS AND ANTENNA WIRES COMING FROM THE FIELD INTO THE BUILDING. BOLT ON FOUNDATION POLES SUPPORTED SATELLITE ANTENNAS, METAL CAP AND POSTS AT LEFT PROTECTED CONDUIT SUPPLYING POWER TO SATELLITE ANTENNA MOTORS. - Marconi Radio Sites, Receiving, Point Reyes Station, Marin County, CA

391

FACILITY EMERGENCY PLAN BUILDINGS 137 East and West  

E-print Network

FACILITY EMERGENCY PLAN BUILDINGS 137 East and West Other SLAC Resources SLAC Site Security Main Normal working hours only SLAC Medical Department 2281 Waste Management 2399 Building manager Todd SLater #12;Emergency Management: Facility Emergency Plan Template This facility emergency plan (FEP) contains

Wechsler, Risa H.

392

Section A, view of east portion of Area 2 parking ...  

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

Section A, view of east portion of Area 2 parking structure showing PATH train tracks at level B5, looking north. (BH) - World Trade Center Site, Bounded by Vesey, Church, Liberty Streets, & Route 9A, New York, New York County, NY

393

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

394

Injury mortality in East Germany.  

PubMed Central

OBJECTIVES: This study determined the effects of social changes in East Germany since 1989 on patterns of injury mortality. METHODS: Death certificate data regarding injuries from 1980 through 1995 and police data regarding traffic injuries in East Germany from 1980 through 1998 were compared with similar data from West Germany. RESULTS: The number of motor vehicle-related injuries and deaths in East Germany increased dramatically between 1989 and 1991, whereas those in West Germany declined slightly. The increased mortality in the more rural East has especially involved young men driving automobiles on rural roads and has persisted since reunification of East and West Germany. Falls, other accidents, and suicides have shown no such effect. Homicide among East German men has increased but remains uncommon. CONCLUSIONS: Recent social changes in East Germany, including increased access to motor vehicles and decreased restrictions on personal freedom, have been associated with increased motor vehicle crashes and mortality, especially among young men and on rural roads. PMID:11076246

Clark, D E; Wildner, M; Bergmann, K E

2000-01-01

395

INTERIOR OF EAST DOOR, SOUTH WALL, AND AISLE LOOKING EAST ...  

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

INTERIOR OF EAST DOOR, SOUTH WALL, AND AISLE LOOKING EAST (This bay of the barn was originally used for livestock. Horse pens and milking stanchions remain. Floor was built with 1/4 inch gaps between the planks to allow air circulation. Photograph also shows the knee-high hinged doors that open for easy removal of manure) - Arnold Farm, Barn, 1948 Arnold Road, Coupeville, Island County, WA

396

Sumo: East and West  

NSDL National Science Digital Library

Often misrepresented outside of its home country, the physically intense sport of sumo is revered by the Japanese and is also a part of the Shinto religion. The sport and its changing traditions come under the documentary lens of filmmakers Ferne Pearlstein and Robert Edwards as they spent four years examining the sport for the Independent Lens series on PBS. Visitors to the site can learn about the different wrestlers profiled in the film, the transformation of the sport as bigger, heavier American sumo wrestlers from Hawaii have entered the field, and the promotion of sumo wrestling in the United States. One particularly nice feature of the site is an area entitled Sumo Style which allows users to learn more about the sumo wrestler, his garb, and his movements. The site is rounded out by a trailer for the film and a good selection of related websites, such as the American Sumo Association.

397

3. View of collapsed structure (type A) next to type ...  

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

3. View of collapsed structure (type A) next to type B structure, facing east-northeast - Nevada Test Site, Japanese Village, Area 4, Yucca Flat, 4-04 Road near Rainier Mesa Road, Mercury, Nye County, NV

398

3. View of Japanese village, type C structure, facing eastsoutheast ...  

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

3. View of Japanese village, type C structure, facing east-southeast - Nevada Test Site, Japanese Village, Type C Structure, Area 4, Yucca Flat, 4-04 Road near Rainier Mesa Road, Mercury, Nye County, NV

399

Next generation population synthesis of accreting white dwarfs - I. Hybrid calculations using BSE+MESA  

NASA Astrophysics Data System (ADS)

Accreting, nuclear-burning white dwarfs (WDs) have been deemed to be candidate progenitors of Type Ia supernovae (SNe Ia), and to account for supersoft X-ray sources, novae, etc. depending on their accretion rates. We have carried out a binary population synthesis study of their populations using two algorithms. In the first, we use the binary population synthesis code BSE as a baseline for the `rapid' approach commonly used in such studies. In the second, we employ a `hybrid' approach, in which we use BSE to generate a population of WDs with non-degenerate companions on the verge of filling their Roche lobes. We then follow their mass transfer phase using the detailed stellar evolution code MESA. We investigate the evolution of the number of rapidly accreting white dwarfs (RAWDs) and stably nuclear-burning white dwarfs (SNBWDs), and estimate the SNe Ia rate produced by `single degenerate' (SD) systems. We find significant differences between the two algorithms in the predicted numbers of SNBWDs at early times, and also in the delay time distribution (DTD) of SD SNe Ia. Such differences in the treatment of mass transfer may partially account for differences in the SNe Ia rate and DTD found by different groups. Adopting 100 per cent efficiency for helium burning, the rate of SNe Ia produced by the SD channel in a Milky Way-like galaxy in our calculations is 2.0 × 10-4 yr-1, more than an order of magnitude below the observationally inferred value. In agreement with previous studies, our calculated SD DTD is inconsistent with observations.

Chen, Hai-Liang; Woods, T. E.; Yungelson, L. R.; Gilfanov, M.; Han, Zhanwen

2014-12-01

400

Middle East Respiratory Syndrome (MERS)  

MedlinePLUS

... associated Cases United Kingdom (UK) France Tunisia Italy Malaysia Philippines Greece Egypt United States of America (USA) ... emergency. IHR Emergency Committee. Jun 17, 2014 WHO Risk Assessment: Middle East respiratory syndrome coronavirus (MERS-CoV) ...

401

How the East Was Lost  

ERIC Educational Resources Information Center

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)

Downs, Ernest C.

1975-01-01

402

ENCYCLOPEDIA OF THE Middle East &  

E-print Network

#12;ENCYCLOPEDIA OF THE Modern Middle East & North Africa S E C O N D E D I T I O N Vincent Battesti and Alan R. Richards, 2004. Agriculture. In Mattar Ph. (ed.), Encyclopedia of the Modern Middle;ENCYCLOPEDIA OF THE Modern Middle East & North Africa S E C O N D E D I T I O N VOLUME 1 Aaronsohn ­ Cyril VI

Paris-Sud XI, Université de

403

Volcanic and magmatic evolution of a small trachytic vent complex, north Burro Mesa, Big Bend National Park, Texas  

USGS Publications Warehouse

Volcanic rocks exposed on the northern end of Burro Mesa in Big Bend National Park portray the evolution of an Oligocene central volcanic vent complex that produced two generations of welded block and ash deposits associated with 1) initial dome collapse and 2) subsequent central spine collapse. Peripheral to the vent complex, isolated breccia deposit exposures overlie ignimbrites, tephras, and lavas. These blocks are a few meters to several hundred meters long and 30 m high and consist of monolithic angular and welded trachytic lava clasts in finer-grained matrix. Rheomorphic structures in the breccia deposit show ductile deformation and suggest it formed while above the glass transition temperature.

Morgan, Lisa A.; Shanks, Pat

2009-01-01

404

Comparisons of the low-cost in-situ MESA plasma sensor with C/NOFS and GAIM plasma density/temperature data  

NASA Astrophysics Data System (ADS)

The United States Air Force Academy's Miniaturized Electrostatic Analyzer (MESA) was flown on the International Space Station between 2009 and 2011, measuring ion spectra when the ISS was ram-facing. From these spectra we have derived plasma density and temperature, and these are compared with in-situ measurements taken by the C/NOFS satellite and derived densities made using the Utah State University Global Assimilation of Ionospheric Measurements (GAIM) model ingesting GPS-TEC data. While communication problems prevented the MESA instrument working to its full capacity, several ionospheric features are identified and analysed. The performance of the MESA instrument is appraised and quantified, and suggestions made for improvements to the next generation of this instrument scheduled to fly on several missions over the next few years.

McHarg, M. G.; Balthazor, R. L.; Scherliess, L.; Schunk, R. W.; DeLaBeaujardiere, O.; Roddy, P.; Hoeffner, Z.; Mueller, B.; Wilhelm, L.; Enloe, L.

2013-12-01

405

Interim long-term surveillance plan for the Cheney disposal site near, Grand Junction, Colorado  

SciTech Connect

This interim long-term surveillance plan (LTSP) describes the U.S. Department of Energy`s (DOE) long-term care program for the Uranium Mill Tailings Remedial Action (UMTRA) Project Cheney Disposal Site in Mesa County near Grand Junction, Colorado. This LSTP describes the long-term surveillance program the DOE will implement to ensure the Cheney disposal site performs as designed and is cared for in a manner that protects the public health and safety and the environment. Before each disposal site is licensed for custody and long-term care, the Nuclear Regulatory Commission (NRC) requires the DOE to submit such a site-specific LTSP.

NONE

1997-08-01

406

Clear energy level shift in ultranarrow InGaAs/InP quantum well wires fabricated by reverse mesa chemical etching  

NASA Astrophysics Data System (ADS)

We have fabricated ultranarrow InGaAs/InP buried quantum well wires by means of electron beam lithography and reverse mesa wet etching. Owing to the reverse mesa etching profile, the lateral dimension of the wires has been reduced to 10 nm. Furthermore, we investigated the optical characteristics of these wires by photoluminescence and observed, for the first time, clear dependence of luminescence wavelength upon the wire width even for wires down to 10 nm, which is well explained by the theoretical calculation. The blue-shifted shoulder structures were also observed and they were assigned theoretically to be the second quantized level.

Notomi, M.; Naganuma, M.; Nishida, T.; Tamamura, T.; Iwamura, H.; Nojima, S.; Okamoto, M.

1991-02-01

407

Development of Site-Specific Irrigation Research under Linear Move Systems  

Microsoft Academic Search

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. Both methods were installed on one machine to cover the same areas whereas the second system

Montana Sidney; Robert G Evans; W. Bart Stevens; William M. Iversen

408

Holocene paleomagnetic secular variation from East China Sea and a PSV stack of East Asia  

NASA Astrophysics Data System (ADS)

Paleomagnetic secular variation (PSV) provides information on the mechanisms of the geodynamo and can also be used for stratigraphic correlation on a regional scale. In this study, we constructed PSV curves of relative rapidly deposited Holocene marine sequence from East China Sea. Results show that the dominant magnetic carriers are pseudo-single domain (PSD) to multidomain (MD) magnetites. Paleomagnetic directions are preserved by coarse-grained magnetite, even affected by post-depositional diagenetic alteration. The PSV record of core MD06-3040 exhibits six major inclination peaks and five declination swings during the Holocene. The periodicities for inclination are about 2000 and 550 years, and for declination are about 1400 and 500 years. The PSV of MD06-3040 is comparable to archeomagnetic and historic results for the last 2500 years and to PSV results from lake sediments in southern China and Japan during the Holocene. A PSV stack of East Asia is constructed by sedimentary and archeological PSV results, which can be used as an important reference curve for a large region, and the PSV correlation between sites can be applied for relative dating of East Asia.

Zheng, Yan; Zheng, Hongbo; Deng, Chenglong; Liu, Qingsong

2014-11-01

409

Assessing Hydraulic Connections Across Structural Blocks, Pahute Mesa, Nevada—Interpreting Hydraulic Properties  

NASA Astrophysics Data System (ADS)

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 properties of the rocks and structures in this aquifer system control radionuclide migration away from areas of underground nuclear testing. The degree of hydraulic connection between structural blocks greatly affects the direction and distance of contaminant transport, but cannot be inferred reliably from geologic interpretation. Drawdown and recovery responses from multiple aquifer tests have been observed between structural blocks where pumping and observation wells were separated by almost 4 km. Hydraulic properties of aquifers, confining units, and fault structures were estimated by interpreting pumping responses from multiple aquifer tests using a single, three-dimensional hydrogeologic framework and multiple groundwater flow models. Multiple flow-models allowed grid refinement near each pumping well. Hydraulic property estimates will be refined easily because each additional aquifer test is interpreted with another independent groundwater flow model. Model fit and sensitivities from each additional model are combined with all previous model comparisons so revised hydraulic property estimates explain all aquifer-test results. Model results suggest that more than 70 percent of the aggregate transmissivity occurs in two fractured lava-flow aquifers where transmissivity exceeds 1,000 m2/d. These aquifers comprise about 20 percent of an 800-m thick sequence of saturated, volcanic rocks and thickness-averaged hydraulic conductivity ranges between 6 and 60 m/d. The underlying units are ash-flow and bedded tuffs that were differentiated in the three-dimensional hydrogeologic framework into aquifers and confining units based on degree of welding. However, these units are indistinguishable in the flow models where hydraulic conductivity estimates are about 0.5 m/d. Faults that bound structural blocks and offset the volcanic section have similarly small estimated hydraulic conductivity and do not appear to be low-permeability barriers or high-permeability fluid conduits. The similarity of hydraulic-conductivity estimates in the lower part of the volcanic section suggests that most of the permeability could be attributed to pervasive and areally extensive secondary fracturing of the emplaced units. The observed hydraulic connection between structural blocks could be explained with fault structures that had hydraulic conductivities similar to the undisturbed host rocks.

Halford, K. J.; Fenelon, J. M.; Garcia, C.; Sweetkind, D. S.

2010-12-01

410

Earthquake Model of the Middle East (EMME) Project: Active Fault Database for the Middle East Region  

NASA Astrophysics Data System (ADS)

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.

Gülen, L.; Wp2 Team

2010-12-01

411

Assessment of potential migration of radionuclides and trace elements from the White Mesa uranium mill to the Ute Mountain Ute Reservation and surrounding areas, southeastern Utah  

USGS Publications Warehouse

In 2007, the Ute Mountain Ute Tribe requested that the U.S. Environmental Protection Agency and U.S. Geological Survey conduct an independent evaluation of potential offsite migration of radionuclides and selected trace elements associated with the ore storage and milling process at an active uranium mill site near White Mesa, Utah. Specific objectives of this study were (1) to determine recharge sources and residence times of groundwater surrounding the mill site, (2) to determine the current concentrations of uranium and associated trace elements in groundwater surrounding the mill site, (3) to differentiate natural and anthropogenic contaminant sources to groundwater resources surrounding the mill site, (4) to assess the solubility and potential for offsite transport of uranium-bearing minerals in groundwater surrounding the mill site, and (5) to use stream sediment and plant material samples from areas surrounding the mill site to identify potential areas of offsite contamination and likely contaminant sources. The results of age-dating methods and an evaluation of groundwater recharge temperatures using dissolved-gas samples indicate that groundwater sampled in wells in the surficial aquifer in the vicinity of the mill is recharged locally by precipitation. Tritium/helium age dating methods found a "modern day" apparent age in water samples collected from springs in the study area surrounding the mill. This apparent age indicates localized recharge sources that potentially include artificial recharge of seepage from constructed wildlife refuge ponds near the mill. The stable oxygen isotope-ratio, delta oxygen-18, or ?(18O/16O), known as ?18O, and hydrogen isotope-ratio, delta deuterium, or ?(2H/1H), known as ?D, data indicate that water discharging from Entrance Spring is isotopically enriched by evaporation and has a similar isotopic fingerprint as water from Recapture Reservoir, which is used as facilities water on the mill site. Water from Recapture Reservoir also is used to irrigate fields surrounding the town of Blanding and infiltration of this irrigated water also could contribute to the enriched isotopic fingerprint observed for Entrance Spring. Similarities in the delta sulfur-34sulfate values in water samples from the wildlife ponds and tailings cells indicate a potential contaminant linkage between the tailings cells and the refuge ponds that could be related to wind carried (eolian) transport of aerosols from the tailings cells. To date (2010), neither the delta sulfur-34sulfate nor the delta oxygen-18sulfate values measured in the wells and springs surrounding the uranium mill site have an isotopic signature characteristic of water from the tailings cells. Except for Entrance Spring and Mill Spring, all groundwater samples collected at down-gradient sample sites during this study had dissolved-uranium concentrations in the range expected for naturally-occurring uranium. The uranium-isotope data indicate that the mill is not a source of uranium in the groundwater in the unconfined-aquifer at any site monitored during the study, with the possible exception of Entrance Spring. The uranium-234 to uranium-238 concentration activity ratios measured in water samples collected at Entrance Spring, and the decrease in this ratio associated with an increase in the concentration of dissolved uranium indicate potential mixing of uranium ore with groundwater at the spring through eolian transport of small particles from ore-storage pads and uncovered ore trucks, with subsequent deposition in the Entrance Spring drainage, followed by dissolution in the unconfined groundwater. The isotopic values of uranium found in other water samples collected during the study do not appear to be related to uranium ore deposits. Water samples collected from Entrance Spring contained the highest median uranium concentrations relative to water samples collected from the other wells and springs monitored during the study. Water samples collected from Entrance Spring also contained elevated concentrations of selen

Naftz, David L.; Ranalli, Anthony J.; Rowland, Ryan C.; Marston, Thomas M.

2011-01-01

412

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

413

Relationships of Mitral Annular Calcification to Cardiovascular Risk Factors: The Multi-Ethnic Study of Atherosclerosis (MESA)  

PubMed Central

Background Mitral annular calcification (MAC) is a fibrous, degenerative calcification of the mitral valve. The relationship between MAC and cardiovascular disease (CVD) risk factors is not well defined. Thus, we performed a cross-sectional study to determine which CVD risk factors are independently associated with MAC in the Multi-Ethnic Study of Atherosclerosis (MESA). Methods MESA includes 6,814 women and men ages 45–84 years old without apparent CVD in 4 ethnic groups (12% Chinese, 38% Caucasian, 22% Hispanic, and 28% African-American). MAC was defined by presence of calcium in the mitral annulus by cardiac computed tomography at enrollment. Multivariable logistic regression was used to evaluate relationships between MAC and CVD risk factors. Results The overall prevalence of MAC was 9%. The prevalence of MAC was highest in Caucasians (12%), followed by Hispanics (10%), African Americans (7%) and was lowest in Chinese (5%). Characteristics associated with MAC included age (p<0.01), female gender (p<0.01), increased body mass index (BMI) (p=0.03), and former smoking status (p<0.008). The MAC group had a higher prevalence of hypertension, diabetes mellitus (DM), and family history of heart attack (all p<0.001). After adjusting for all variables, age, female gender, diabetes mellitus, and increased BMI remained strongly associated with MAC. Conclusions Age, female gender, DM, and increased BMI were significantly associated with MAC. Prevalence of MAC was strongly associated with female gender and increasing age in all ethnicities. PMID:20926076

Kanjanauthai, Somsupha; Nasir, Khurram; Katz, Ronit; Rivera, Juan J.; Takasu, Junichiro; Blumenthal, Roger S.; Eng, John; Budoff, Matthew J.

2010-01-01

414

Analysis of Mesa Dislocation Gettering in HgCdTe/CdTe/Si(211) by Scanning Transmission Electron Microscopy  

NASA Astrophysics Data System (ADS)

Due to its strong infrared absorption and variable band-gap, HgCdTe is the ideal detector material for high-performance infrared focal-plane arrays (IRFPAs). Next-generation IRFPAs will utilize dual-color high-definition formats on large-area substrates such as Si or GaAs. However, heteroepitaxial growth on these substrates is plagued by high densities of lattice-mismatch-induced threading dislocations (TDs) that ultimately reduce IRFPA operability. Previously we demonstrated a postgrowth technique with the potential to eliminate or move TDs such that they have less impact on detector operability. In this technique, highly reticulated mesa structures are produced in as-grown HgCdTe epilayers, and then subjected to thermal cycle annealing. To fully exploit this technique, better understanding of the inherent mechanism is required. In this work, we employ scanning transmission electron microscopy (STEM) analysis of HgCdTe/CdTe/Si(211) samples prepared by focused ion beam milling. A key factor is the use of defect-decorated samples, which allows for a correlation of etch pits observed on the surface with underlying dislocation segments viewed in cross-section STEM images. We perform an analysis of these dislocations in terms of the general distribution, density, and mobility at various locations within the mesa structures. Based on our observations, we suggest factors that contribute to the underlying mechanism for dislocation gettering.

Jacobs, R. N.; Stoltz, A. J.; Benson, J. D.; Smith, P.; Lennon, C. M.; Almeida, L. A.; Farrell, S.; Wijewarnasuriya, P. S.; Brill, G.; Chen, Y.; Salmon, M.; Zu, J.

2013-11-01

415

Camera position east of CO172CE8, showing east sides of two ...  

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

Camera position east of CO-172-CE-8, showing east sides of two most eastern wings and north side of most eastern wing. - Fitzsimons General Hospital, Laundry, Southeast corner of East Harlow Avenue & South Twelfth Street, Aurora, Adams County, CO

416

Application of Geographic Information System Methods to Identify Areas Yielding Water that will be Replaced by Water from the Colorado River in the Vidal and Chemehuevi Areas, California, and the Mohave Mesa Area, Arizona  

USGS Publications Warehouse

Relations between the elevation of the static water level in wells and the elevation of the accounting surface within the Colorado River aquifer in the vicinity of Vidal, California, the Chemehuevi Indian Reservation, California, and on Mohave Mesa, Arizona, were used to determine which wells outside the flood plain of the Colorado River are presumed to yield water that will be replaced by water from the Colorado River. Wells that have a static water-level elevation equal to or below the elevation of the accounting surface are presumed to yield water that will be replaced by water from the Colorado River. Geographic Information System (GIS) interpolation tools were used to produce maps of areas where water levels are above, below, and near (within ? 0.84 foot) the accounting surface. Calculated water-level elevations and interpolated accounting-surface elevations were determined for 33 wells in the vicinity of Vidal, 16 wells in the Chemehuevi area, and 35 wells on Mohave Mesa. Water-level measurements generally were taken in the last 10 years with steel and electrical tapes accurate to within hundredths of a foot. A Differential Global Positioning System (DGPS) was used to determine land-surface elevations to within an operational accuracy of ? 0.43 foot, resulting in calculated water-level elevations having a 95-percent confidence interval of ? 0.84 foot. In the Vidal area, differences in elevation between the accounting surface and measured water levels range from -2.7 feet below to as much as 17.6 feet above the accounting surface. Relative differences between the elevation of the water level and the elevation of the accounting surface decrease from west to east and from north to south. In the Chemehuevi area, differences in elevation range from -3.7 feet below to as much as 8.7 feet above the accounting surface, which is established at 449.6 feet in the vicinity of Lake Havasu. In all of the Mohave Mesa area, the water-level elevation is near or below the elevation of the accounting surface. Differences in elevation between water levels and the accounting surface range from -0.2 to -11.3 feet, with most values exceeding -7.0 feet. In general, the ArcGIS Triangulated Irregular Network (TIN) Contour and Natural Neighbor tools reasonably represent areas where the elevation of water levels in wells is above, below, and near (within ? 0.84 foot) the elevation of the accounting surface in the Vidal and Chemehuevi study areas and accurately delineate areas around outlying wells and where anomalies exist. The TIN Contour tool provides a strict linear interpolation while the Natural Neighbor tool provides a smoothed interpolation. Using the default options in ArcGIS, the Inverse Distance Weighted (IDW) and Spline tools also reasonably represent areas above, below, and near the accounting surface in the Vidal and Chemehuevi areas. However, spatial extent of and boundaries between areas above, below, and near the accounting surface vary among the GIS methods, which results largely from the fundamentally different mathematical approaches used by these tools. The limited number and spatial distribution of wells in comparison to the size of the areas, and the locations and relative differences in elevation between water levels and the accounting surface of wells with anomalous water levels also influence the contouring by each of these methods. Qualitatively, the Natural Neighbor tool appears to provide the best representation of the difference between water-level and accounting-surface elevations in the study areas, on the basis of available well data.

Spangler, Lawrence E.; Angeroth, Cory E.; Walton, Sarah J.

2008-01-01

417

EastThe Magazine of easT Carolina UniversiTy An eye for Art  

E-print Network

EastThe Magazine of easT Carolina UniversiTy winter2008 An eye for Art How East Carolina's long on silk by Mary edna fraser '74 #12;EastThe Magazine of easT Carolina UniversiTy winter2008 viewfinder 26 of the long history and pronounced appeal of the fine arts at East Carolina. 18 long-TerM inTeresT By Steve

418

Economic Outlook for East Asia  

NSDL National Science Digital Library

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.

1998-01-01

419

Ancient Near East and the Mediterranean World  

NSDL National Science Digital Library

Sponsored by the University of Chicago Library and funded by the National Endowment for the Humanities, this online project contains numerous primary materials related to the study of the ancient Near East and covers topics ranging from archaeology; art history; language; law; and the religions of Sumer, Babylonia, Assyria, Egypt, Nubia, and Persia. Currently, the project includes full-text editions of 33 seminal works in the field, including works on Greek athletics and the exploration of Palestine during the first decade of the 20th century. For those seeking to read them in their language of origin, several of the texts are also available in the original French and German. This site will be of great interest to persons hoping to look through primary research texts, but find themselves unable to make a trip to the University of Chicago Library.

420

The 2014 East Asian Core Observatories Association (EACOA) Fellowship Program  

E-print Network

) Introduction To promote East Asian regional astronomy research cooperation, the East Asian Core ObservatoryThe 2014 East Asian Core Observatories Association (EACOA) Fellowship Program (August 13, 2012

Tian, Weidong

421

Thermopolis/East Thermopolis, Wyoming site-specific development analysis  

SciTech Connect

Some of the topics addressed are: what the area is like currently in terms of its land use, economics, and demographics; reservoir potentials; how the reservoir might be developed; marketing the final product; financial assistance for development; the legal aspects of development; and barriers to possible development. Some specific topics discussed are: leasing and permitting; heat exchangers for geothermal heating systems; and corrosion, scaling, and materials selection. (MHR)

Burgess-Lyon, P.

1981-06-01

422

Site disturbance from intensive forestry practices in East Texas  

E-print Network

on some side slopes. A shortleaf pine (Pinus echinata Mill) hardwood type dominates the vegetation. The predominant hardwoods are a mixture of oaks: southern red oak (Quercus falcata var. falcata Michx), white oak (guercus alba L. ), blackjack oak... on some side slopes. A shortleaf pine (Pinus echinata Mill) hardwood type dominates the vegetation. The predominant hardwoods are a mixture of oaks: southern red oak (Quercus falcata var. falcata Michx), white oak (guercus alba L. ), blackjack oak...

Crawley, Walter Wayne

2012-06-07

423

Geochemical similarities between volcanic units at Yucca Mountain and Pahute Mesa: evidence for a common magmatic origin for volcanic sequences that flank the Timber Mountain Caldera  

SciTech Connect

Chemical compositions have been determined for sanidine, plagioclase, biotite, and hornblende phenocrysts by electron microprobe for a comprehensive set of samples of Crater Flat Tuff and tuffs of Calico Hills. Most of these samples were obtained from drill holes at Yucca Mountain. Samples of tuffs and lavas of Area 20, obtained from locations at Pahute Mesa, have similarly been subjected to microprobe analysis. Complete modal petrography has been determined for all samples. Biotite and hornblende in the samples from both Yucca Mountain and Pahute Mesa have Fe-rich compositions that contract strikingly with Fe-poor compositions in the overlying Paintbrush Tuff and the underlying Lithic Ridge Tuff at Yucca Mountain. Each unit from Yucca Mountain has distinctive compositions for both sanidine and plagioclase that very closely match compositions for a corresponding unit identified within the lower, middle and upper portions of the Area 20 tuffs and lavas from Pahute Mesa. Each of these paired units probably originated from a common parental magma and was eruptd contemporaneously or nearly so. Each pair of units with matching phenocryst chemistries has a similar, but not identical set of petrographic characteristics. The petrographic differences, as well as small differences in phenocryst chemistry, result from a sonal distribution of phenocrysts within the parent magma chamber and eruption through earlier units that differ markedly between Yucca Mountain and Pahute Mesa.

Warren, R.G.

1983-12-31

424

Proceedings of the Annual International Conference of the Association for the Education of Teachers in Science (Costa Mesa, California, January 18-21, 2001).  

ERIC Educational Resources Information Center

This document contains the proceedings of the 2001 Annual International Conference of the Association for the Education of Teachers in Science which was held in Costa Mesa, California, January 18-21, 2001. Papers include: (1) "An Elementary Preservice Teacher's Search for Solutions about the Evolution-Divine Creation Question: The Story of Tracy"…

Rubba, Peter A., Ed.; Rye, James A., Ed.; DiBiase, Warren J., Ed.; Crawford, Barbara A., Ed.

425

Step Free Surface Heteroepitaxy of 3C-SiC Layers on Patterned 4H/6H-SiC Mesas and Cantilevers  

NASA Technical Reports Server (NTRS)

Most SiC devices are implemented in homoepitaxial films grown on 4H/6H-SiC wafers with surfaces 3 degrees to 8 degrees off-axis from the (0001) basal plane. This approach has not prevented many substrate crystal defects from propagating into SiC epilayers, and does not permit the realization of SiC heteropolytype devices. This presentation describes recent advances in SiC epitaxial growth that begun to overcome the above shortcomings for arrays of mesas patterned into on-axis 4H/6H-SiC wafers. First, we demonstrated that atomic-scale surface steps can be completely eliminated from 4H/6H-SiC mesas via on-axis homoepitaxial step-flow growth, forming (0001) basal plane surfaces (up to 0.4 mm x 0.4 mm) for larger than previously thought possible. Step-free surface areas were then extended by growth fo thin lateral cantilevers from the mesa tops. These lateral cantilevers enabled substrate defects to be reduced and relocated in homoepitaxial films in a manner not possible with off-axis SiC growth. Finally, growth of vastly improved 3C-SiC heterofilms was achieved on 4H/6H-SiC mesas using the recently develop step-free surface heteroepitaxy process. These epitaxial growth developments should enable improved homojunction and heterojunction silicon carbide prototype devices.

Neudeck, Philip G.; Powell, J. Anthony; Trunek, Andrew J.; Spry, David J.

2003-01-01

426

Anisotropy of Magnetic Susceptibility of a Magma Flow Sheet in the Trachyte Mesa Laccolith of the Henry Mountains in South-Central Utah  

Microsoft Academic Search

The Trachyte Mesa Laccolith (TML) in the Henry Mountains of south-central Utah is thought to have been formed by the coalescing of numerous horizontal magma sheets that stemmed from the nearby igneous intrusion, Mount Hillers. To understand the flow behavior within a magma sheet, cores (ranging in length from 60 cm to 1.2 m) were cut through the top sheet

T. M. Serwatowski; S. S. Morgan; B. Tikoff

2008-01-01

427

Archaeological studies at Drill Hole U20az Pahute Mesa, Nye county, Nevada. [Contains bibliography  

SciTech Connect

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.

Simmons, A.H.; Hemphill, M.L.; Henton, G.H.; Lockett, C.L.; Nials, F.L.; Pippin, L.C.; Walsh, L.

1991-07-01

428

Dust transport from non-East Asian sources to the North Pacific  

NASA Astrophysics Data System (ADS)

It is generally thought that East Asia dominates the supply of eolian dust to the North Pacific. Here we show the first data-based evidence of dust primarily from non-East Asian sources even during March 2010 when a super dust storm from East Asia struck the western Pacific. Chemical characteristics of aerosol samples collected at a high-mountain site in Taiwan show variable inputs from eolian dust and biomass burning. From backward trajectory analyses, satellite observation and model simulation, dust origins can be traced to the Middle East and North Africa, suggesting an integrated source from the global dust belt. Our global model results demonstrate that dust deposition in the North Pacific is primarily contributed by non-East Asian sources with an eastward decrease along the Westerlies.

Hsu, Shih-Chieh; Huh, Chih-An; Lin, Chuan-Yao; Chen, Wei-Nai; Mahowald, Natalie M.; Liu, Shaw-Chen; Chou, C. C. K.; Liang, Mao-Chang; Tsai, Chuen-Jinn; Lin, Fei-Jan; Chen, Jen-Ping; Huang, Yi-Tang

2012-06-01

429

Modeling study of ozone seasonal cycle in lower troposphere over east Asia  

NASA Astrophysics Data System (ADS)

On the basis of three mountain sites (Mount Tai, Hua and Huang) newly founded in east-central China and several other sites from the Acid Deposition Monitoring Network in east Asia (EANET) and WMO World Data Centre for Greenhouse Gases (WDCGG), we investigate seasonal cycle of ozone over east Asia and its budgets in east-central China by using a regional chemical transport model (NAQPMS). The observations show a striking ozone pattern of two sharp peaks in May-June and September-October at three mountain sites in east-central China which are higher than those observed at other mountain sites in Europe and North America. Ozone budgets analysis by the model confirms that maximum of net photochemical productions reaches 31.8, 15.1, and 11.4 ppbv/d at Mount Tai, Hua, and Huang, respectively. The net photochemical production dominates the formation of ozone maximums at Mount Tai and Hua in June, and the importing transport also plays a comparable importance at Mount Huang. In comparison with those in the western North Pacific, east-central China shows stronger net photochemical productions, which are comparable to anthropogenic sources regions in Europe and North America.

Li, Jie; Wang, Zifa; Akimoto, Hajime; Gao, Chao; Pochanart, Pakpong; Wang, Xiquan

2007-11-01

430

Service Learning in East Timor  

ERIC Educational Resources Information Center

Five days in East Timor visiting orphanages changed the lives of five young men from Youth Off The Streets. The children in these orphanages run by the Salesian order of the Catholic church are products of the Indonesian invasion, which began in 1975 and continued until 1999. Massive destruction occurred throughout the country. Buildings at the…

Reclaiming Children and Youth: The Journal of Strength-based Interventions, 2004

2004-01-01

431

Great Explorers to the East.  

ERIC Educational Resources Information Center

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";…

Baker, Rosalie F., Ed.; Baker, Charles F. III, Ed.

1990-01-01

432

Humboldt National Forest East Mormon  

E-print Network

North East Mormon Mountain Gold Point Amargosa Valley 375 215 215 146 168 160 215 146 375 601 215 127 Vegas Blue Diamond Paradise Trona Spring Valley Searles Valley Tonopah Chloride Searchlight Shoshone-Sha Shoshone Band of California Moapa River Reservation Las Vegas Colony 93 6 95 95 6 93 93 State Line County

Laughlin, Robert B.

433

Precipitation chemistry in East Asia  

Microsoft Academic Search

The chemical composition of precipitation in East Asia was analyzed on the basis of the results of cooperative monitoring performed during the period from 1992 to 1993. The wet deposition of soluble ions was characterized by two major factors; the geographical distribution of precursor production through natural and anthropogenic activities, and the meteorological conditions such as wind system and rainfall

Shin-ichi Fujita; Akira Takahashi; Jian-Hua Weng; Lian-Fen Huang; Hui-Kang Kim; Cheng-Kang Li; Frank T. C. Huang; Fu-Tien Jeng

2000-01-01

434

Middle East Environmental Law Initiative  

Microsoft Academic Search

The Middle East, a predominately arid and semiarid region, faces major environmental problems, including growing water shortages, climate change, and air and water pollution. Many of the nations in the region share similar environmental problems that require similar and\\/or common solutions. Laws and legal institutions need to be created, developed and strengthened at the national and regional levels in order

Seyed Mohammed Mehdi Hosseini

2012-01-01

435

THE EAST ORANGE EDUCATION PLAZA.  

ERIC Educational Resources Information Center

THE EAST ORANGE EDUCATION PLAZA WAS A PROPOSAL DEVELOPED TO PROVIDE BETTER EDUCATIONAL OPPORTUNITY FOR CHILDREN FROM KINDERGARTEN THROUGH HIGH SCHOOL. THE PHYSICAL STRUCTURE OF THE PLAZA WOULD ENCOURAGE DEVELOPMENT OF A PROGRAM WHICH WOULD APPLY TO ALL KINDS OF STUDENTS. SPECIALIZED TEACHERS AND SPECIAL RESOURCES WOULD BE BROUGHT TOGETHER IN ONE…

East Orange Public Schools, NJ.

436

Palaeoclimate: East Antarctica's Achilles' heel  

NASA Astrophysics Data System (ADS)

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.

Hillenbrand, Claus-Dieter

2013-09-01

437

Prolific Overton field gas reservoirs within large transverse oolite shoals, Upper Jurassic Haynesville, Eastern Margin East Texas basin  

Microsoft Academic Search

Late Triassic rifting along a northeast-southwest spreading center in east Texas resulted in basement highs along the eastern margin of the East Texas basin that became sites of extensive ooid shoal deposition during Late Jurassic time. Reservoirs within oolite facies at Overton field contain over 1 tcf of natural gas. These large shoals, each approximately 15 mi (24 km) long

T. E. Covington; R. G. Lighty; W. M. Ahr

1985-01-01

438

Evidence for iceberg armadas from East Antarctica in the Southern Ocean during the late Miocene and early Pliocene  

E-print Network

Evidence for iceberg armadas from East Antarctica in the Southern Ocean during the late Miocene discharges of icebergs from Wilkes Land and Adélie Land, more than 1500 kilometers to the east of the depositional site. This distant source of icebergs is clearly defined by the presence of IRD hornblende grains

Long, Bernard

439

Evidence for iceberg armadas from East Antarctica in the Southern Ocean during the late Miocene and early Pliocene  

E-print Network

Evidence for iceberg armadas from East Antarctica in the Southern Ocean during the late Miocene discharges of icebergs from Wilkes Land and Ad�lie Land, more than 1500 kilometers to the east of the depositional site. This distant source of icebergs is clearly de ned by the presence of IRD hornblende grains

Hemming, Sidney R