The Salton Seismic Imaging Project: Seismic velocity structure of the Brawley Seismic Zone, Salton Buttes and Geothermal Field, Salton Trough, California

NASA Astrophysics Data System (ADS)

Delph, J.; Hole, J. A.; Fuis, G. S.; Stock, J. M.; Rymer, M. J.

2011-12-01

The Salton Trough is an active rift in southern California in a step-over between the plate-bounding Imperial and San Andreas Faults. In March 2011, the Salton Seismic Imaging Project (SSIP) investigated the rift's crustal structure by acquiring several seismic refraction and reflection lines. One of the densely sampled refraction lines crosses the northern-most Imperial Valley, perpendicular to the strike-slip faults and parallel to a line of small Quaternary rhyolitic volcanoes. The line crosses the obliquely extensional Brawley Seismic Zone and goes through one of the most geothermally productive areas in the United States. Well logs indicate the valley is filled by several kilometers of late Pliocene-recent lacustrine, fluvial, and shallow marine sediment. The 42-km long seismic line was comprised of eleven 110-460 kg explosive shots and receivers at a 100 m spacing. First arrival travel times were used to build a tomographic seismic velocity image of the upper crust. Velocity in the valley increases smoothly from <2 km/s to >5 km/s, indicating diagenesis and gradational metamorphism of rift sediments at very shallow depth due to an elevated geotherm. The velocity gradient is much smaller in the relatively low velocity (<6 km/s) crystalline basement comprised of recently metamorphosed sediment reaching greenschist to lower amphibolite facies. The depth of this basement is about 4-km below the aseismic region of the valley west of the Brawley Seismic Zone, but rises sharply to ~2 km depth beneath the seismically, geothermally, and volcanically active area of the Brawley Seismic Zone. The basement deepens to the northeast of the active tectonic zone and then is abruptly offset to shallower depth on the northeast side of the valley. This offset may be the subsurficial expression of a paleofault, most likely an extension of the Sand Hills Fault, which bounds the basin to the east. Basement velocity east of the fault is ~5.7 km/s, consistent with the granitic rocks

Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Salton Sea area, California, 1986-87

USGS Publications Warehouse

Setmire, J.G.; Wolfe, J.C.; Stroud, R.K.

1990-01-01

Water, bottom sediment, and biota were sampled during 1986 and 1987 in the Salton Sea area to determine concentrations of trace elements and pesticides as part of the Department of Interior Irrigation Drainage Program. The sampling sites (12 water, 15 bottom sediment, and 5 biota) were located in the Coachella and Imperial Valleys. The focus of sampling was to determine the current or potential threat to the wildlife of the Salton National Wildlife Refuge from irrigation projects sponsored or operated by the Department of the Interior. Results of the investigation indicate that selenium is the major element of concern. Elevated concentrations of selenium in water were restricted to tile-drain effluent. The maximum selenium concentration of 300 microg/L was detected in a tile-drain sample, and the minimum concentration of 1 microg/L was detected in a composite sample of Salton Sea water. The median selenium concentration was 19 microg/L. In contrast to the water, the highest bottom-sediment selenium concentration of 3.3 mg/kg was in a composite sample from the Salton Sea. The selenium detected in samples of waterfowl and fish also are of concern, but, to date, no studies have been done in the Salton Sea area to determine if selenium has caused adverse biological effects. Concentrations of boron and manganese were elevated in tile-drain samples throughout the Imperial Valley. Boron concentrations in migratory waterfowl were at levels that could cause reproduction impairment. Elevated concentrations of chromium, nickel, and zinc were detected in the Whitewater River , but they were not associated with irrigation drainage. Organochlorine pesticide residues were detected in bottom sediment throughout the study area at levels approaching those measured more than 10 years ago. More detailed studies would be needed to determine if these residues are affecting the waterfowl. (USGS)

Hydrology and physiography of the Salton Sea, California

USGS Publications Warehouse

Littlefield, W.M.

1966-01-01

The increased utilization of the Salton Sea and its shore for recreation, the development of residential complexes on its shore, and the encroachment of the sea into these developments have emphasized the need for a concise summary of hydrologic and physiographic information concerning the area. This report attempts to fill that need.The report was authorized by a cooperative agreement between the U.S. Geological Survey and the California Department of Water Resources. It was prepared under the general direction of Walter Hofmann, district chief of the Water Resources Division of the Geological Survey, at Menlo Park. 

Constraints on mantle melt geometries from body wave attenuation in the Salton Trough and Snake River Plain

NASA Astrophysics Data System (ADS)

Byrnes, J. S.; Bezada, M.

2017-12-01

Melt can be retained in the mantle at triple junctions between grain boundaries, be spread in thin films along two-grain boundaries, or be organized by shear into elongate melt-rich bands. Which of these geometries is most prevalent is unknown. This ambiguity makes the interpretation of anomalous seismic velocities and quality factors difficult, since different geometries would result in different mechanical effects. Here, we compare observations of seismic attenuation beneath the Salton Trough and the Snake River Plain; two regions where the presence of melt has been inferred. The results suggest that seismic attenuation is diagnostic of melt geometry. We measure the relative attenuation of P waves from deep focus earthquakes using a time-domain method. Even though the two regions are underlain by comparably strong low-velocity anomalies, their attenuation signature is very different. The upper mantle beneath the Salton Trough is sufficiently attenuating that the presence of melt must lower Qp, while attenuation beneath the Snake River Plain is not anomalous with respect to surrounding regions. These seemingly contradictory results can be reconciled if different melt geometries characterize each region. SKS splitting from the Salton Trough suggests that melt is organized into melt-rich bands, while this is not the case for the Snake River Plain. We infer that beneath the Snake River Plain melt is retained at triple junctions between grain boundaries, a geometry that is not predicted to cause seismic attenuation. More elongate geometries beneath the Salton Trough may cause seismic attenuation via the melt-squirt mechanism. In light of these results, we conclude that prior observations of low seismic velocities with somewhat high quality factors beneath the East Pacific Rise and Southern California suggest that melt does not organize into elongate bands across much of the asthenosphere.

Type C botulism in pelicans and other fish-eating birds at the Salton Sea

USGS Publications Warehouse

Rocke, T.E.; Nol, P.; Pelizza, C.; Sturm, K.K.

2004-01-01

In 1996, type C avian botulism killed over 10,000 pelicans and nearly 10,000 other fish-eating birds at the Salton Sea in southern California. Although botulism had been previously documented in waterbirds at the Sea, this die-off was unusual in that it involved primarily fish-eating birds. The American White Pelican (Pelecanus erythrorynchos) was the species with the greatest mortality in 1996. Since 1996, mortality has recurred every year but losses have declined (<2,000 birds/year), with relatively more Brown Pelicans (P. occidentalis) than White Pelicans afflicted. In 2000, morbidity and mortality of Brown Pelicans with type C botulism (1311) approached the numbers afflicted in 1996 (2034). In recent years, mortality reached a peak earlier in the summer, July and August, in contrast to 1996 when mortality reached a peak in September. An exotic fish species, tilapia (Oreochromis mossambicus), has been implicated as the source of toxin for birds at Salton Sea, but the source of toxin for fish is unknown.

Pesticides and PCBs in sediments and fish from the Salton Sea, California, USA.

PubMed

Sapozhnikova, Yelena; Bawardi, Ola; Schlenk, Daniel

2004-05-01

The Salton Sea, the largest manmade lake in California, is officially designated by the State of California as an agricultural drainage reservoir. The purpose of this study was to determine organochlorine and organophosphorous pesticides, as well as polychlorinated biphenyl (PCB) concentrations in sediments and fish tissues in the Salton Sea and evaluate the relative ecological risk of these compounds. Sediment samples were taken during 2000-2001 and fish tissues (Tilapia mossambique, Cynoscion xanthulu) were collected in May 2001. All samples were analyzed for 12 chlorinated pesticides, 6 organophosphorus pesticides, and 55 polychlorinated biphenyl (PCB) congeners. SigmaDichlorodiphenyltrichloroethane (SigmaDDT) and total PCB concentrations observed in sediments ranged from 10 to 40 and 116 to 304 ng/g dry wt, respectively. DDT/DDD ratios in sediments and fish tissues of the northern Sea in 2001 indicated recent DDT exposure. Lindane, dieldrin, dichlorodiphenylethane (DDE) and total PCB concentrations detected in sediments exceeded probable effect levels established for freshwater ecosystems, and pp-DDE and total PCB concentrations were higher than effect range-median values developed for marine and estuarine sediments. In fish liver, concentrations of endrin and SigmaDDT exceeded threshold effect level established for invertebrates. SigmaDDT concentrations detected in fish tissues were higher than threshold concentrations for the protection of wildlife consumers of aquatic biota. DDE concentrations in fish muscles tissues were above the 50 ng/g concentration threshold for the protection of predatory birds. Dimethoate, diazinon, malathion, chlorpyrifos, disulfoton varied from < or = 0.15 to 9.5 ng/g dry wt in sediments and from < or = 0.1 to 80.3 ng/g wet wt in fish tissues. Disulfoton was found in relatively high concentrations (up to 80.3 ng/g) in all organs from Tilapia and Corvina. These results demonstrate continued contamination of specific organochlorine

Massive infestation by Amyloodinium ocellatum (Dinoflagellida) of fish in a highly saline lake, Salton Sea, California, USA.

PubMed

Kuperman, B I; Matey, V E

1999-12-22

Persistent fish infestation by the parasitic dinoflagellate Amyloodinium ocellatum was found at a highly saline lake, Salton Sea, California, USA. The seasonal dynamics of the infestation of young tilapia was traced in 1997-1998. First appearing in May, it became maximal in June-August, decreased in October and was not detectable in November. Outbreak of the infestation and subsequent mortality of young fish was registered at the Sea at a water temperature and salinity of 40 degrees C and 46 ppt, respectively. Some aspects of the ultrastructure of parasitic trophonts of A. ocellatum and their location on the fish from different size groups are considered. The interactions of parasitological and environmental factors and their combined effect upon fish from the Salton Sea are discussed.

Fault zone characteristics and basin complexity in the southern Salton Trough, California

USGS Publications Warehouse

Persaud, Patricia; Ma, Yiran; Stock, Joann M.; Hole, John A.; Fuis, Gary S.; Han, Liang

2016-01-01

Ongoing oblique slip at the Pacific–North America plate boundary in the Salton Trough produced the Imperial Valley (California, USA), a seismically active area with deformation distributed across a complex network of exposed and buried faults. To better understand the shallow crustal structure in this region and the connectivity of faults and seismicity lineaments, we used data primarily from the Salton Seismic Imaging Project to construct a three-dimensional P-wave velocity model down to 8 km depth and a velocity profile to 15 km depth, both at 1 km grid spacing. A VP = 5.65–5.85 km/s layer of possibly metamorphosed sediments within, and crystalline basement outside, the valley is locally as thick as 5 km, but is thickest and deepest in fault zones and near seismicity lineaments, suggesting a causative relationship between the low velocities and faulting. Both seismicity lineaments and surface faults control the structural architecture of the western part of the larger wedge-shaped basin, where two deep subbasins are located. We estimate basement depths, and show that high velocities at shallow depths and possible basement highs characterize the geothermal areas.

Unusual dominance by desert pupfish (Cyprinodon macularius) in experimental ponds within the Salton Sea Basin

USGS Publications Warehouse

Saiki, Michael K.; Martin, Barbara A.; Anderson, Thomas W.

2011-01-01

In October 2006, months after shallow experimental ponds in the Salton Sea Basin were filled with water from the Alamo River and Salton Sea, fish were observed in several ponds, although inlets had been screened to exclude fish. During October 2007November 2009, nine surveys were conducted using baited minnow traps to document species and relative abundance of fish. Surveys yielded 3,620 fish representing five species. Desert pupfish (Cyprinodon macularius), the only native species encountered, was the most numerous and comprised >93% of the catch. Nonnative species included western mosquitofish (Gambusia affinis, 4.1%), sailfin molly (Poecilia latipinna, 2.8%), and tilapia (a mixture of hybrid Mozambique tilapia Oreochromis mossambicus ?? O. urolepis and redbelly tilapia Tilapia zillii, <0.1%). Dominance by desert pupfish, which persisted over our 2 years of study, was unusual because surveys conducted in nearby agricultural drains yielded relatively few desert pupfish.

REVIEW OF THE FISHERIES OF THE SALTON SEA, CALIFORNIA, USA: PAST, PRESENT, FUTURE. (R826552)

EPA Science Inventory

The Salton Sea is an endorheic, 980-km² salt lake in the Sonoran Desert of southern California. The historical fish community switched from freshwater to marine species as salinity increased due to evaporation and brackish water inflows. Three species, bairdiella (<...

Organochlorine pesticide, polychlorinated biphenyl, trace element and metal residues in bird eggs from Salton Sea, California, 2004

USGS Publications Warehouse

Henny, Charles J.; Anderson, T.W.; Crayon, J.J.

2008-01-01

The Salton Sea is a highly eutrophic, hypersaline terminal lake that receives inflows primarily from agricultural drainages in the Imperial and Coachella valleys. Impending reductions in water inflow at Salton Sea may concentrate existing contaminants which have been a concern for many years, and result in higher exposure to birds. Thus, waterbird eggs were collected and analyzed in 2004 and compared with residue concentrations from earlier years; these data provide a base for future comparisons. Eggs from four waterbird species (black-crowned night-heron [Nycticorax nycticorax], great egret [Ardea alba], black-necked stilt [Himantopus mexicanus], and American avocet [Recurvirostra Americana]) were collected. Eggs were analyzed for organochlorine pesticides, polychlorinated biphenyls (PCBs), metals, and trace elements, with current results compared to those reported for eggs collected from the same species and others during 1985a??1993. The two contaminants of primary concern were p,pa??-DDE (DDE) and selenium. DDE concentrations in night-heron and great egret eggs collected from the northwest corner of Salton Sea (Whitewater River delta) decreased 91 and 95%, respectively, by 2004, with a concomitant increase in eggshell thickness for both species. Decreases in bird egg DDE levels paralleled those in tissues of tilapia (Oreochromis mossambicus ?? O. urolepis), an important prey species for herons and egrets. Despite most nests of night-herons and great egrets failing in 2004 due to predation, predicted reproductive effects based on DDE concentrations in eggs were low or negligible for these species. The 2004 DDE findings were in dramatic contrast to those in the past decade, and included an 81% decrease in black-necked stilt eggs, although concentrations were lower historically than those reported in night-herons and egrets. Selenium concentrations in black-necked stilt eggs from the southeast corner of Salton Sea (Davis Road) were similar in 1993 and 2004, with 4

SALTON SEA SCIENTIFIC DRILLING PROJECT: SCIENTIFIC PROGRAM.

USGS Publications Warehouse

Sass, J.H.; Elders, W.A.

1986-01-01

The Salton Sea Scientific Drilling Project, was spudded on 24 October 1985, and reached a total depth of 10,564 ft. (3. 2 km) on 17 March 1986. There followed a period of logging, a flow test, and downhole scientific measurements. The scientific goals were integrated smoothly with the engineering and economic objectives of the program and the ideal of 'science driving the drill' in continental scientific drilling projects was achieved in large measure. The principal scientific goals of the project were to study the physical and chemical processes involved in an active, magmatically driven hydrothermal system. To facilitate these studies, high priority was attached to four areas of sample and data collection, namely: (1) core and cuttings, (2) formation fluids, (3) geophysical logging, and (4) downhole physical measurements, particularly temperatures and pressures.

Imaging of Upper-Mantle Upwelling Beneath the Salton Trough, Southern California, by Joint Inversion of Ambient Noise Dispersion Curves and Receiver Functions

NASA Astrophysics Data System (ADS)

Klemperer, S. L.; Barak, S.

2016-12-01

We present a new 2D shear-wave velocity model of the crust and upper-mantle across the Salton Trough, southern California, obtained by jointly inverting our new dataset of receiver functions and our previously published Rayleigh-wave group-velocity model (Barak et al., G-cubed, 2015), obtained from ambient-noise tomography. Our results show an upper-mantle low-velocity zone (LVZ) with Vs ≤4.2 km/s extending from the Elsinore Fault to the Sand Hills Fault, that together bracket the full width of major San Andreas dextral motion since its inception 6 Ma b.p., and underlying the full width of low topography of the Imperial Valley and Salton Trough. The lateral extent of the LVZ is coincident with the lateral extent of an upper-mantle anisotropic region interpreted as a zone of SAF-parallel melt pockets (Barak & Klemperer, Geology, 2016). The shallowest part of the LVZ is 40 km depth, coincident with S-receiver function images. The western part of the LVZ, between the Elsinore and San Jacinto faults (the region of greatest modern dextral slip), appears to continue to significantly greater depth; but a puzzling feature of our preliminary models is that the eastern part of the LVZ, from the San Jacinto Fault to the Sand Hills Fault, appears to be underlain by more-normalvelocity upper mantle (Vs ≥ 4.5 km/s) below 75 km depth. We compare our model to the current SCEC community models CVM-H and CVM-S, and to P-wave velocity models obtained by the active-source Salton Sea Imaging Project (SSIP). The hypothesized lower-crustal low-velocity zone beneath the Salton Trough in our previous model (Barak et al., G-cubed, 2015), there interpreted as a region of partial melt, is not supported by our new modeling. Melt may be largely absent from the lower crust of the Salton trough; but appears required in the upper mantle at depths as shallow as 40 km.

Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea

USGS Publications Warehouse

Mendelsohn, M.B.; Boarman, W.I.; Fisher, R.N.; Hathaway, S.A.

2007-01-01

Large aquatic bodies influence surrounding terrestrial ecosystems by providing water and nutrients. In arid landscapes, the increased primary productivity that results may greatly enhance vertebrate biodiversity. The Salton Sea, a large saline lake in the Colorado Desert of southern California, provides nutrients in the form of hundreds of thousands of dead fish carcasses, brine flies, and chemical compounds through windborne salt sea spray. We performed point counts for landbirds and shorebirds monthly or every other month between March 2001 and February 2002 across a sampling grid of 35 points along the west edge of Salton Sea. We found that avian diversity (numbers of species and numbers per species) was dependent on proximity to the Sea. Diversity was at a maximum nearest the shore, and was significantly lower away from the Sea's edge, at all surveyed distances up to 1 km from the shore. Cover by the dominant shrubs on the study site also corresponded to proximity to the water's edge. Whereas one may hypothesize that the avian diversity patterns are caused by these differences in vegetation structure, our data did not support this. Future studies should further investigate this potential correlation between vegetation and bird patterns. Until more is understood about the relationship between elevated avian diversity and the physical environment of the land-shore interface, our results suggest that the Sea's surface be stabilized near its present level. Future management schemes at the Salton Sea that include reductions of water sources should be carefully analyzed, so as to not jeopardize the terrestrial avifauna at this unique ecosystem. ?? 2006 Elsevier Ltd. All rights reserved.

The epizootiology of type C botulism in fish-eating birds at Salton Sea, California

USGS Publications Warehouse

Nol, P.

2002-01-01

During 1996, type C avian botulism killed over 15,000 fish-eating birds at the Salton Sea in southern California. Amont those affected were nearly 10,000 western white pelicans (Pelecanus erythrorhynchos) and over 1,200 endangered California brown pelicans (Pelecanus occidentalis californicus). Since 1996, smaller epizootics have occurred every year. Type C botulism is not typically associated with fish-eating birds. In the case of the Salton Sea, Mozambique tilapia (Oreochromis mossambicus) are the suspected source of type C toxin, although the mechanism by which the fish acquire the toxin is still unknown. The goals of this study were to: 1) Determine presence/absence of active Clostridium botulinum type C and type C botulinum toxin in tilapia in the Salton Sea. 2) Use geospatial analyses to evaluate relationships between patterns of mortality in birds and fish and presence/absence of toxin and/or toxin-producing bacteria in sediments and fish. We investigated a method of detecting C. botulinum type C cells in the intestinal contents of Mozambique tilapia. This method involved extraction of predominantly cellular DNA and uses a polymerase chain reaction assay to detect presence of type C toxin gene. We collected sick, dead and healthy fish from various sites throughout the Sea during the summers of 1999 to 2001 in order to test them for the presence of active C. botulinum type C by PCR and for the presence of type C toxin by ELISA and mouse test. The results demonstrate that the tilapia population in the Salton Sea harbors C. botulinum type C cells within their gastrointestinal tract and the prevalence of this organism varies from year to year. The total number of fish with toxin-producing bacteria was significantly greater in 2000 than in 2001. No difference in the numbers of positives was detected between sick and dead fish compared to live fish, and there were no differences noted with regard to location of fish collection. The prevalence of active type C

Chronostratigraphy of the Fish Creek-Vallecito Basin, SW Salton Trough: A High-Fidelity Record of Slip on the West Salton Detachment Fault and Subsidence in its Upper Plate

NASA Astrophysics Data System (ADS)

Dorsey, R. J.; Housen, B. A.; Janecke, S. U.; McDougall, K.; Fanning, M.; Fluette, A.; Axen, G. J.; Shirvell, C. R.

2006-12-01

The Fish Creek-Vallecito basin contains a 5.1-km thick section of sedimentary rocks in the SW Salton Trough that range in age from 8.1 to 0.9 Ma. The section preserves a record of basin subsidence related to slip on the West Salton detachment fault (WSDF), which formed the main western rift-flank structure of the Salton Trough. We obtained a well-constrained chronology from compilation of existing (Johnson et al., 1983) and new paleomagnetic data, ages of two tuffs high in the section, and thicknesses calculated from the geologic map of Winker (1987) and our work in the lower 1.3 km. The tuffs yielded SHRIMP U-Pb ages of 2.56 ± 0.09 and 2.54 ± 0.09 Ma from single zircons. Geohistory analysis, corrected for paleobathymetry and global sea- level change, yields a decompacted subsidence curve with 5 segments bounded by abrupt changes in subsidence rate: (1) 0.46 mm/yr from 8.1 to 5.5 Ma; (2) 1.8 mm/yr from 5.5 to 5.2 Ma; (3) zero subsidence or slight uplift from 5.2 to 4.6 Ma; (4) 1.9 mm/yr from 4.6 to 3.2 Ma; and (5) 0.4 mm/yr from 3.2 to 0.9 Ma. The base of the Elephant Trees Fm, dated here at 8.1 Ma, provides the earliest well dated record of extension in the SW Salton Trough. Earliest marine incursion is dated at 6.3 Ma, and the first appearance of Colorado River sand coincides closely with the Miocene-Pliocene boundary (5.33 Ma). Because the base of the marine Imperial Group does not coincide with a change in subsidence rate, we suggest that initial marine incursion resulted from a latest Miocene global sea-level highstand superposed on steady subsidence. Thus, the inflections at 8.1 and 5.5 Ma are the two most likely ages for onset of slip on the WSDF, but 4.6 Ma is also possible. Variations in subsidence rate are not predicted by models for extensional detachment faults, and may reflect episodic pulsed fault slip and/or long-wavelength folding related to dextral-wrench tectonics. Rapid subsidence in segment 4 began during progradation of the Colorado River

48 CFR 52.214-23 - Late submissions, modifications, revisions, and withdrawals of technical proposals under two-step...

Code of Federal Regulations, 2010 CFR

2010-10-01

... resume. (e) Technical proposals may be withdrawn by written notice received at any time before the exact..., modifications, revisions, and withdrawals of technical proposals under two-step sealed bidding. 52.214-23... Late submissions, modifications, revisions, and withdrawals of technical proposals under two-step...

Episodic Holocene eruption of the Salton Buttes rhyolites, California, from paleomagnetic, U-Th, and Ar/Ar dating

USGS Publications Warehouse

Wright, Heather M.; Vazquez, Jorge A.; Champion, Duane E.; Calvert, Andrew T.; Mangan, Margaret T.; Stelten, Mark E.; Cooper, Kari M.; Herzig, Charles; Schriener Jr., Alexander

2015-01-01

In the Salton Trough, CA, five rhyolite domes form the Salton Buttes: Mullet Island, Obsidian Butte, Rock Hill, North and South Red Hill, from oldest to youngest. Results presented here include 40Ar/39Ar anorthoclase ages, 238U-230Th zircon crystallization ages, and comparison of remanent paleomagnetic directions with the secular variation curve, which indicate that all domes are Holocene. 238U-230Th zircon crystallization ages are more precise than but within uncertainty of 40Ar/39Ar anorthoclase ages, suggesting that zircon crystallization proceeded until shortly before eruption in all cases except one. Remanent paleomagnetic directions require three eruption periods: (1) Mullet Island, (2) Obsidian Butte, and (3) Rock Hill, North Red Hill, and South Red Hill. Borehole cuttings logs document up to two shallow tephra layers. North and South Red Hills likely erupted within 100 years of each other, with a combined 238U-230Th zircon isochron age of: 2.83 ± 0.60 ka (2 sigma); paleomagnetic evidence suggests this age predates eruption by hundreds of years (1800 cal BP). Rock Hill erupted closely in time to these eruptions. The Obsidian Butte 238U-230Th isochron age (2.86 ± 0.96 ka) is nearly identical to the combined Red Hill age, but its Virtual Geomagnetic Pole position suggests a slightly older age. The age of aphyric Mullet Island dome is the least well constrained: zircon crystals are resorbed and the paleomagnetic direction is most distinct; possible Mullet Island ages include ca. 2300, 5900, 6900, and 7700 cal BP. Our results constrain the duration of Salton Buttes volcanism to between ca. 5900 and 500 years.

Shallow Crustal Structure in the Northern Salton Trough, California: Insights from a Detailed 3-D Velocity Model

NASA Astrophysics Data System (ADS)

Ajala, R.; Persaud, P.; Stock, J. M.; Fuis, G. S.; Hole, J. A.; Goldman, M.; Scheirer, D. S.

2017-12-01

The Coachella Valley is the northern extent of the Gulf of California-Salton Trough. It contains the southernmost segment of the San Andreas Fault (SAF) for which a magnitude 7.8 earthquake rupture was modeled to help produce earthquake planning scenarios. However, discrepancies in ground motion and travel-time estimates from the current Southern California Earthquake Center (SCEC) velocity model of the Salton Trough highlight inaccuracies in its shallow velocity structure. An improved 3-D velocity model that better defines the shallow basin structure and enables the more accurate location of earthquakes and identification of faults is therefore essential for seismic hazard studies in this area. We used recordings of 126 explosive shots from the 2011 Salton Seismic Imaging Project (SSIP) to SSIP receivers and Southern California Seismic Network (SCSN) stations. A set of 48,105 P-wave travel time picks constituted the highest-quality input to a 3-D tomographic velocity inversion. To improve the ray coverage, we added network-determined first arrivals at SCSN stations from 39,998 recently relocated local earthquakes, selected to a maximum focal depth of 10 km, to develop a detailed 3-D P-wave velocity model for the Coachella Valley with 1-km grid spacing. Our velocity model shows good resolution ( 50 rays/cubic km) down to a minimum depth of 7 km. Depth slices from the velocity model reveal several interesting features. At shallow depths ( 3 km), we observe an elongated trough of low velocity, attributed to sediments, located subparallel to and a few km SW of the SAF, and a general velocity structure that mimics the surface geology of the area. The persistence of the low-velocity sediments to 5-km depth just north of the Salton Sea suggests that the underlying basement surface, shallower to the NW, dips SE, consistent with interpretation from gravity studies (Langenheim et al., 2005). On the western side of the Coachella Valley, we detect depth-restricted regions of

Seismicity and source spectra analysis in Salton Sea Geothermal Field

NASA Astrophysics Data System (ADS)

Cheng, Y.; Chen, X.

2016-12-01

The surge of "man-made" earthquakes in recent years has led to considerable concerns about the associated hazards. Improved monitoring of small earthquakes would significantly help understand such phenomena and the underlying physical mechanisms. In the Salton Sea Geothermal field in southern California, open access of a local borehole network provides a unique opportunity to better understand the seismicity characteristics, the related earthquake hazards, and the relationship with the geothermal system, tectonic faulting and other physical conditions. We obtain high-resolution earthquake locations in the Salton Sea Geothermal Field, analyze characteristics of spatiotemporal isolated earthquake clusters, magnitude-frequency distributions and spatial variation of stress drops. The analysis reveals spatial coherent distributions of different types of clustering, b-value distributions, and stress drop distribution. The mixture type clusters (short-duration rapid bursts with high aftershock productivity) are predominately located within active geothermal field that correlate with high b-value, low stress drop microearthquake clouds, while regular aftershock sequences and swarms are distributed throughout the study area. The differences between earthquakes inside and outside of geothermal operation field suggest a possible way to distinguish directly induced seismicity due to energy operation versus typical seismic slip driven sequences. The spatial coherent b-value distribution enables in-situ estimation of probabilities for M≥3 earthquakes, and shows that the high large-magnitude-event (LME) probability zones with high stress drop are likely associated with tectonic faulting. The high stress drop in shallow (1-3 km) depth indicates the existence of active faults, while low stress drops near injection wells likely corresponds to the seismic response to fluid injection. I interpret the spatial variation of seismicity and source characteristics as the result of fluid

The effects of thick sediment upon continental breakup: seismic imaging and thermal modeling of the Salton Trough, southern California

NASA Astrophysics Data System (ADS)

Han, L.; Hole, J. A.; Lowell, R. P.; Stock, J. M.; Fuis, G. S.; Driscoll, N. W.; Kell, A. M.; Kent, G. M.; Harding, A. J.; Gonzalez-Fernandez, A.; Lázaro-Mancilla, O.

2015-12-01

Continental rifting ultimately creates a deep accommodation space for sediment. When a major river flows into a late-stage rift, thick deltaic sediment can change the thermal regime and alter the mechanisms of extension and continental breakup. The Salton Trough, the northernmost rift segment of the Gulf of California plate boundary, has experienced the same extension as the rest of the Gulf, but is filled to sea level by sediment from the Colorado River. Unlike the southern Gulf, seafloor spreading has not initiated. Instead, seismicity, high heat flow, and minor volcanoes attest to ongoing rifting of thin, transitional crust. Recently acquired controlled-source seismic refraction and wide-angle reflection data in the Salton Trough provide constraints upon crustal architecture and active rift processes. The crust in the central Salton Trough is only 17-18 km thick, with a strongly layered but relatively one-dimensional structure for ~100 km in the direction of plate motion. The upper crust includes 2-4 km of Colorado River sediment. Crystalline rock below the sediment is interpreted to be similar sediment metamorphosed by the high heat flow and geothermal activity. Meta-sediment extends to at least 9 km depth. A 4-5 km thick layer in the middle crust is either additional meta-sediment or stretched pre-existing continental crust. The lowermost 4-5 km of the crust is rift-related mafic magmatic intrusion or underplating from partial melting in the hot upper mantle. North American lithosphere in the Salton Trough has been almost or completely rifted apart. The gap has been filled by ~100 km of new transitional crust created by magmatism from below and sedimentation from above. These processes create strong lithologic, thermal, and rheologic layering. While heat flow in the rift is very high, rapid sedimentation cools the upper crust as compared to a linear geotherm. Brittle extension occurs within new meta-sedimentary rock. The lower crust, in comparison, is

GIS Plate Tectonic Reconstruction of the Gulf of California-Salton Trough Oblique Rift

NASA Astrophysics Data System (ADS)

Skinner, L. A.; Bennett, S. E.; Umhoefer, P. J.; Oskin, M. E.; Dorsey, R. J.; Nava, R. A.

2011-12-01

We present GIS-based plate tectonic reconstruction maps for the Gulf of California-Salton Trough oblique rift. The maps track plate boundary deformation in 2 and 1 Myr slices (6-2 Ma and 2 Ma-present) using a custom ArcGIS add-in tool to close extensional basins and restore slip on dextral faults. The tool takes a set of polygons depicting present day locations of tectonic blocks and sequentially restores displacement of their centroids along a vector specific to that time slice. Tectonic blocks are defined by faults, geology, seismic data, and bathymetry/topography. Spreading center and fault-slip rates were acquired from geologic data, cross-Gulf tie points, GPS studies, and aeromagnetic data. A recent GPS study indicated that ~92% of modern-day Pacific-North America (PAC-NAM) plate motion is localized between the Baja California microplate and North America. Relative plate motion azimuth varies from ~302° in the southern Gulf to ~314° in the Salton Trough. Baja-North America GPS rates agree remarkably with ~6 Ma geologic offsets across the Gulf and are used during reconstruction steps back to 6 Ma. In the southern Gulf, unpublished GPS data indicate that modern plate motion is partitioned between the plate boundary, Gulf-margin system, and borderland faults west of Baja California. The Alarcon and Guaymas spreading centers initiated at 2.4 Ma and 6 Ma (Lizarralde et al., 2007), respectively, while the Farallon, Pescadero, and Carmen spreading centers began between ~2-1 Ma (Lonsdale, 1989). Therefore, the 2, 4, and 6 Ma reconstruction steps include a long transtensional fault zone along much of the southern Gulf, connecting the Guaymas spreading center with either the Alarcon spreading center or East Pacific Rise. In the northern Gulf, transtensional strain initiated in coastal Sonora by ~7 Ma and migrated westward as the Gulf opened. At ~6 Ma strain migrated west into marine pull-apart basins that now lie within the eastern Gulf. Seismic reflection studies

Molecular characterization and morphology of the photosynthetic dinoflagellate Bysmatrum caponii from two solar saltons in western Korea

NASA Astrophysics Data System (ADS)

Jeong, Hae Jin; Jang, Se Hyeon; Kang, Nam Seon; Yoo, Yeong Du; Kim, Min Jeong; Lee, Kyung Ha; Yoon, Eun Young; Potvin, Éric; Hwang, Yeong Jong; Kim, Jong Im; Seong, Kyeong Ah

2012-03-01

Species belonging to the genus Bysmatrum are peridinoid, thecate, photosynthetic dinoflagellates. The plate formula of Bysmatrum spp., arranged in a Kofoidian series, is almost identical to that of Scrippsiella spp. Bysmatrum spp., which were originally classified as Scrippsiella spp., but were transferred to the genus Bysmatrum spp. because of separation of the intercalary plates 2a and 3a by plate 3'. Whether this transfer from Scrippsiella spp. to Bysmatrum spp. is reasonable should be genetically confirmed. Dinoflagellates were isolated from 2 solar saltons located in western Korea in 2009-2010 and 3 clonal cultures from Sooseong solar saltons and 2 clonal cultures from Garolim solar saltons were successfully established. All of these dinoflagellates were identified as Bysmatrum caponii based on morphology analysis by light and electron microscopy. The plates of all Korean strains of B. caponii were arranged in a Kofoidian series of Po, X, 4', 3a, 7″, 6c, 4s, 5‴, 0 (p), and 24'. When properly aligned, the ribosomal DNA (rDNA) sequences of the 3 Sooseong strains of B. caponii were identical, as were those of the 2 Garolim strains. Furthermore, the sequences of the 3 Sooseong strains were 0.01% different from those of the Garolim strains. However, the sequences of SSU rDNA of these Korean B. caponii strains were 9% different from that of Bysmatrum subsalsum and > 10% from that of any other dinoflagellate thus far reported. In the phylogenetic trees generated using SSU and LSU rDNA sequences, these Korean B. caponii strains formed a clade with B. subsalsum which was clearly divergent from the Scrippsiella clade. However, this Bysmatrum clade was phylogenetically close to the Protoperidinium and/or Peridinium clades. The results of the present study suggest that Bysmatrum spp. are markedly different genetically from Scrippsiella spp..

The Salton Seismic Imaging Project: Tomographic characterization of a sediment-filled rift valley and adjacent ranges, southern California

NASA Astrophysics Data System (ADS)

Davenport, K.; Hole, J. A.; Stock, J. M.; Fuis, G. S.; Carrick, E.; Tikoff, B.

2011-12-01

The Salton Trough in Southern California represents the northernmost rift of the Gulf of California extensional system. Relative motion between the Pacific and North American plates is accommodated by continental rifting in step-over zones between the San Andreas, Imperial, and Cerro Prieto transform faults. Rapid sedimentation from the Colorado River has isolated the trough from the southern portion of the Gulf of California, progressively filling the subsiding rift basin. Based on data from previous seismic surveys, the pre-existing continent has ruptured completely, and a new ~22 km thick crust has been created entirely by sedimentation overlying rift-related magmatism. The MARGINS, EarthScope, and USGS-funded Salton Seismic Imaging Project (SSIP) was designed to investigate the nature of this new crust, the ongoing process of continental rifting, and associated earthquake hazards. SSIP, acquired in March 2011, comprises 7 lines of onshore seismic refraction / wide-angle reflection data, 2 lines of refraction / reflection data in the Salton Sea, and a line of broadband stations. This presentation focuses on the refraction / wide-angle reflection line across the Imperial Valley, extending ~220 km across California from Otay Mesa, near Tijuana, to the Colorado River. The data from this line includes seventeen 100-160 kg explosive shots and receivers at 100 m spacing across the Imperial Valley to constrain the structure of the Salton Trough rift basin, including the Imperial Fault. Eight larger shots (600-920 kg) at 20-35 km spacing and receivers at 200-500 m spacing extend the line across the Peninsular Ranges and the Chocolate Mountains. These data will contrast the structure of the rift to that of the surrounding crust and provide constraints on whole-crust and uppermost mantle structure. Preliminary work has included tomographic inversion of first-arrival travel times across the Valley, emphasizing a minimum-structure approach to create a velocity model of the

Long-term changes in the phosphorus loading to and trophic state of the Salton Sea, California

USGS Publications Warehouse

Robertson, Dale M.; Schladow, S.G.; Holdren, G.C.

2008-01-01

The Salton Sea (Sea) is a eutrophic to hypereutrophic lake characterized by high nutrient concentrations, low water clarity, and high biological productivity. Based on dissolved phosphorus (P) and nitrogen (N) concentrations and N:P ratios, P is typically the limiting nutrient in the Sea and, therefore, should be the primary nutrient of concern when considering management efforts. Flows in the major tributaries to the Sea have been measured since 1965, whereas total P (TP) concentrations were only measured intermittently by various agencies since 1968. These data were used to estimate annual P loading from 1965 to 2002. Annual loads have increased steadily from ???940,000 kg around 1968 to ???1,450,000 kg in 2002 (???55% increase), primarily a result of increased TP concentrations and loads in the New River. Although the eutrophic condition of the Salton Sea is of great concern, only limited nutrient data are available for the Sea. It is difficult to determine whether the eutrophic state of the Sea has degraded or possibly even improved slightly in response to the change in P loading because of variability in the data and changes in the sampling and analytical methodologies. ?? 2008 Springer Science+Business Media B.V.

Structure of the active rift zone and margins of the northern Imperial Valley from Salton Seismic Imaging Project (SSIP) data

NASA Astrophysics Data System (ADS)

Livers, A.; Han, L.; Delph, J. R.; White-Gaynor, A. L.; Petit, R.; Hole, J. A.; Stock, J. M.; Fuis, G. S.

2012-12-01

First-arrival refraction data were used to create a seismic velocity model of the upper crust across the actively rifting northern Imperial Valley and its margins. The densely sampled seismic refraction data were acquired by the Salton Seismic Imaging Project (SSIP) , which is investigating rift processes in the northern-most rift segment of the Gulf of California extensional province and earthquake hazards at the southern end of the San Andreas Fault system. A 95-km long seismic line was acquired across the northern Imperial Valley, through the Salton Sea geothermal field, parallel to the five Salton Butte volcanoes and perpendicular to the Brawley Seismic Zone and major strike-slip faults. Nineteen explosive shots were recorded with 100 m seismometer spacing across the valley and with 300-500 m spacing into the adjacent ranges. First-arrival travel times were picked from shot gathers along this line and a seismic velocity model was produced using tomographic inversion. Sedimentary basement and seismic basement in the valley are interpreted to be sediment metamorphosed by the very high heat flow. The velocity model shows that this basement to the west of the Brawley Seismic Zone is at ~4-km depth. The basement shallows to ~2-km depth in the active geothermal field and Salton Buttes volcanic field which locally coincide with the Brawley Seismic Zone. At the eastern edge of the geothermal field, the basement drops off again to ~3.5-km depth. The eastern edge of the valley appears to be fault bounded by the along-strike extension of the Sand Hills Fault, an inactive strike-slip fault. The seismic velocities to the east of the fault correspond to metamorphic rock of the Chocolate Mountains, different from the metamorphosed basement in the valley. The western edge of the valley appears to be fault bounded by the active Superstition Hills Fault. To the west of the valley, >4-km deep valley basement extends to the active Superstition Hills Fault. Basement then shallows

77 FR 9216 - Native American Career and Technical Education Program; Proposed Waivers and Extension of the...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-16

... DEPARTMENT OF EDUCATION Native American Career and Technical Education Program; Proposed Waivers... Education, Department of Education. ACTION: Notice. SUMMARY: For 60-month projects funded in fiscal year (FY) 2007 under the Native American Career and Technical Education Program (NACTEP), the Secretary proposes...

Thermal and petrologic constraints on the lower crustal melt accumulation in the Salton Sea Geothermal Field

NASA Astrophysics Data System (ADS)

Karakas, O.; Dufek, J.; Mangan, M.; Wright, H. M. N.

2014-12-01

Heat transfer in active volcanic areas is governed by complex coupling between tectonic and magmatic processes. These two processes provide unique imprints on the petrologic and thermal evolution of magma by controlling the geometry, depth, longevity, composition, and fraction of melt in the crust. The active volcanism, tectonic extension, and significantly high surface heat flow in Salton Sea Geothermal Field, CA, provides information about the dynamic heat transfer processes in its crust. The volcanism in the area is associated with tectonic extension over the last 500 ka, followed by subsidence and sedimentation at the surface level and dike emplacement in the lower crust. Although significant progress has been made describing the tectonic evolution and petrology of the erupted products of the Salton Buttes, their coupled control on the crustal heat transfer and feedback on the melt evolution remain unclear. To address these concepts, we develop a two-dimensional finite volume model and investigate the compositional and thermal evolution of the melt and crust in the Salton Sea Geothermal Field through a one-way coupled thermal model that accounts for tectonic extension, lower crustal magma emplacement, sedimentation, and subsidence. Through our simulations, we give quantitative estimates to the thermal and compositional evolution and longevity of the lower crustal melt source in the crustal section. We further compare the model results with petrologic constraints. Our thermal balance equations show that crustal melting is limited and the melt is dominated by mantle-derived material. Similarly, petrologic work on δ18O isotope ratios suggests fractional crystallization of basalt with minor crustal assimilation. In addition, we suggest scenarios for the melt fraction, composition, enthalpy release, geometry and depth of magma reservoirs, their temporal evolution, and the timescales of magmatic storage and evolution processes. These parameters provide the source

78 FR 64146 - 30-Day Notice of Proposed Information Collection: Technical Processing Requirements for...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-25

... Information Collection: Technical Processing Requirements for Multifamily Project Mortgage Insurance AGENCY: Office of the Chief Information Officer, HUD. ACTION: Notice. SUMMARY: HUD has submitted the proposed... Information Collection Title of Information Collection: Technical Processing Requirements for Multifamily...

Total selenium in irrigation drain inflows to the Salton Sea, California, April 2009

USGS Publications Warehouse

May, Thomas W.; Walther, Michael J.; Saiki, Michael K.; Brumbaugh, William G.

2009-01-01

This report presents the results for the final sampling period (April 2009) of a 4-year monitoring program to characterize selenium concentrations in selected irrigation drains flowing into the Salton Sea, California. Total selenium and total suspended solids were determined in water samples. Total selenium, percent total organic carbon, and particle size were determined in sediments. Mean total selenium concentrations in water ranged from 0.98 to 22.9 micrograms per liter. Total selenium concentrations in sediment ranged from 0.078 to 5.0 micrograms per gram dry weight.

75 FR 6683 - Notice of Proposed Information Collection: Comment Request; Technical Processing Requirements for...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-10

... Information Collection: Comment Request; Technical Processing Requirements for Multifamily Project Mortgage... information: Title of Proposal: Technical Processing Requirements for Multifamily Project Mortgage Insurance... information collection requirement described below will be submitted to the Office of Management and Budget...

Plate boundary deformation at the latitude of the Salton Trough - northern Gulf of California (Invited)

NASA Astrophysics Data System (ADS)

Stock, J. M.

2013-12-01

Along the Pacific-North America plate boundary zone, the segment including the southern San Andreas fault to Salton Trough and northern Gulf of California basins has been transtensional throughout its evolution, based on Pacific-North America displacement vectors calculated from the global plate circuit (900 × 20 km at N54°W since 20 Ma; 460 × 20 km at N48°W since 11 Ma). Nevertheless, active seismicity and focal mechanisms show a broad zone of plate boundary deformation within which the inferred stress regime varies locally (Yang & Hauksson 2013 GJI), and fault patterns in some regions suggest ongoing tectonic rotation. Similar behavior is inferred to have occurred in this zone over most of its history. Crustal structure in this region is constrained by surface geology, geophysical experiments (e.g., the 2011 Salton Seismic Imaging Project (SSIP), USGS Imperial Valley 1979, PACE), and interdisciplinary marine and onland studies in Mexico (e.g., NARS-Baja, Cortes, and surveys by PEMEX). Magnetic data (e.g., EMAG-2) aids in the recognition of large-scale crustal provinces and fault boundaries in regions lacking detailed geophysical surveys. Consideration of existing constraints on crustal thickness and architecture, and fault and basin evolution suggests that to reconcile geological deformation with plate motion history, the following additional factors need to be taken into account. 1) Plate boundary displacement via interacting systems of rotating blocks, coeval with slip on steep strike slip faults, and possibly related to slip on low angle extensional faults (e.g, Axen & Fletcher 1998 IGR) may be typical prior to the onset of seafloor spreading. This fault style may have accommodated up to 150 km of plate motion in the Mexican Continental Borderland and north of the Vizcaino Peninsula, likely between 12 and 15 Ma, as well as explaining younger rotations adjacent to the Gulf of California and current deformation southwest of the Salton Sea. 2) Geophysical

The application of active-source seismic imaging techniques to transtensional problems the Walker Lane and Salton Trough

NASA Astrophysics Data System (ADS)

Kell, Anna Marie

The plate margin in the western United States is an active tectonic region that contains the integrated deformation between the North American and Pacific plates. Nearly focused plate motion between the North American and Pacific plates within the northern Gulf of California gives way north of the Salton Trough to more diffuse deformation. In particular a large fraction of the slip along the southernmost San Andreas fault ultimately bleeds eastward, including about 20% of the total plate motion budget that finds its way through the transtensional Walker Lane Deformation Belt just east of the Sierra Nevada mountain range. Fault-bounded ranges combined with intervening low-lying basins characterize this region; the down-dropped features are often filled with water, which present opportunities for seismic imaging at unprecedented scales. Here I present active-source seismic imaging from the Salton Sea and Walker Lane Deformation Belt, including both marine applications in lakes and shallow seas, and more conventional land-based techniques along the Carson range front. The complex fault network beneath the Salton Trough in eastern California is the on-land continuation of the Gulf of California rift system, where North American-Pacific plate motion is accommodated by a series of long transform faults, separated by small pull-apart, transtensional basins; the right-lateral San Andreas fault bounds this system to the north where it carries, on average, about 50% of total plate motion. The Salton Sea resides within the most youthful and northerly "spreading center" in this several thousand-kilometer-long rift system. The Sea provides an ideal environment for the use of high-data-density marine seismic techniques. Two active-source seismic campaigns in 2010 and 2011 show progression of the development of the Salton pull-apart sub-basin and the northerly propagation of the Imperial-San Andreas system through time at varying resolutions. High fidelity seismic imagery

76 FR 32967 - Proposed Extensions and Waivers: National Early Childhood Technical Assistance Center

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-07

... DEPARTMENT OF EDUCATION [CFDA No. 84.326H] Proposed Extensions and Waivers: National Early Childhood Technical Assistance Center AGENCY: Office of Special Education Programs, Office of Special Education and Rehabilitative Services, Department of Education. ACTION: Notice of proposed extension of...

Seismic Reflectivity of the Crust in the Northern Salton Trough

NASA Astrophysics Data System (ADS)

Bauer, K.; Fuis, G. S.; Goldman, M.; Persaud, P.; Ryberg, T.; Langenheim, V. E.; Scheirer, D. S.; Rymer, M. J.; Hole, J. A.; Stock, J. M.; Catchings, R.

2015-12-01

The Salton Trough in southern California is a tectonically active pull-apart basin that was formed by migrating step-overs between strike-slip faults, of which the San Andreas Fault (SAF) and the Imperial Fault are the current, northernmost examples. The Salton Seismic Imaging Project (SSIP) was undertaken to improve our knowledge of fault geometry and seismic velocities within the sedimentary basins and underlying crystalline crust around the SAF. Such data are useful as input for modeling scenarios of strong ground shaking in the surrounding high-population areas. We used pre-stack depth migration of line segments from shot gathers in several seismic profiles that were acquired in the northern part of the SSIP study area (Lines 4 - 7). Our migration approach can be considered as an infinite-frequency approximation of the Fresnel volume pre-stack depth migration method. We use line segments instead of the original waveform data. We demonstrate the method using synthetic data and analyze real data from Lines 4 - 7 to illustrate the relationship between distinct phases in the time domain and their resulting image at depth. We show both normal-moveout reflections from sub-horizontal interfaces and reverse-moveout reflections from steep interfaces, such as faults. Migrated images of dipping faults, such as the SAF and the Pinto Mountain Fault, are presented in this way. The SAF is imaged along Line 4, through the Mecca Hills, as a number of steeply dipping fault segments that collectively form a flower structure, above 5 km depth, that sole into a moderately NE-dipping fault below that depth. The individual migrated reflection packages correlate with mapped surface fault traces in the Mecca Hills. A similar geometry is seen on Line 6, from Palm Springs through Yucca Valley, where fault splays sole or project into a moderately dipping SAF below 10-km depth. We also show and discuss the reflectivity pattern of the middle and lower crust for Lines 4 - 7.

Selenium in aquatic biota inhabiting agricultural drains in the Salton Sea Basin, California.

PubMed

Saiki, Michael K; Martin, Barbara A; May, Thomas W

2012-09-01

Resource managers are concerned that water conservation practices in irrigated farmlands along the southern border of the Salton Sea, Imperial County, California, could increase selenium concentrations in agricultural drainwater and harm the desert pupfish (Cyprinodon macularius), a federally protected endangered species. As part of a broader attempt to address this concern, we conducted a 3-year investigation to collect baseline information on selenium concentrations in seven agricultural drains inhabited by pupfish. We collected water, sediment, selected aquatic food-chain taxa (particulate organic detritus, filamentous algae, net plankton, and midge [Chironomidae] larvae), and two poeciliid fishes (western mosquitofish Gambusia affinis and sailfin molly Poecilia latipinna) for selenium determinations. The two fish species served as ecological surrogates for pupfish, which we were not permitted to sacrifice. Dissolved selenium ranged from 0.70 to 32.8 μg/L, with selenate as the major constituent. Total selenium concentrations in other environmental matrices varied widely among drains, with one drain (Trifolium 18) exhibiting especially high concentrations in detritus, 5.98-58.0 μg Se/g; midge larvae, 12.7-50.6 μg Se/g; mosquitofish, 13.2-20.2 μg Se/g; and mollies, 12.8-30.4 μg Se/g (all tissue concentrations are based on dry weights). Although toxic thresholds for selenium in fishes from the Salton Sea are still poorly understood, available evidence suggests that ambient concentrations of this element may not be sufficiently elevated to adversely affect reproductive success and survival in selenium-tolerant poeciliids and pupfish.

Thermal regime of the State 2-14 well, Salton Sea Scientific Drilling Project

USGS Publications Warehouse

Sass, J.H.; Priest, S.S.; Duda, L.E.; Carson, C.C.; Hendricks, J.D.; Robison, L.C.

1988-01-01

Temperature logs were made repeatedly during breaks in drilling and both during and after flow tests in the Salton Sea Scientific Drilling Project well (State 2-14). The purpose of these logs was to assist in identifying zones of fluid loss or gain and to characterize reservoir temperatures. At the conclusion of the active phase of the project, a series of logs was begun in an attempt to establish the equilibrium temperature profile. Thermal gradients decrease from about 250 mK m-1 in the upper few hundred meters to just below 200 mK m-1 near the base of the conductive cap. Using one interpretation, thermal conductivities increase with depth (mainly because of decreasing porosity), resulting in component heat flows that agree reasonably well with the mean of about 450 mW m-2. This value agrees well with heat flow data from the shallow wells within the Salton Sea geothermal field. A second interpretation, in which measured temperature coefficients of quartz- and carbonate-rich rocks are used to correct thermal conductivity, results in lower mean conductivities that are roughly constant with depth and, consequently, systematically decreasing heat flux averaging about 350 mW m-2 below 300 m. This interpretation is consistent with the inference (from fluid inclusion studies) that the rocks in this part of the field were once several tens of degrees Celsius hotter than they are now. The age of this possible disturbance is estimated at a few thousand years. -from Authors

Selenium in aquatic biota inhabiting agricultural drains in the Salton Sea Basin, California

USGS Publications Warehouse

Saiki, Michael K.; Martin, Barbara A.; May, Thomas W.

2012-01-01

Resource managers are concerned that water conservation practices in irrigated farmlands along the southern border of the Salton Sea, Imperial County, California, could increase selenium concentrations in agricultural drainwater and harm the desert pupfish (Cyprinodon macularius), a federally protected endangered species. As part of a broader attempt to address this concern, we conducted a 3-year investigation to collect baseline information on selenium concentrations in seven agricultural drains inhabited by pupfish. We collected water, sediment, selected aquatic food-chain taxa (particulate organic detritus, filamentous algae, net plankton, and midge [Chironomidae] larvae), and two poeciliid fishes (western mosquitofish Gambusia affinis and sailfin molly Poecilia latipinna) for selenium determinations. The two fish species served as ecological surrogates for pupfish, which we were not permitted to sacrifice. Dissolved selenium ranged from 0.70 to 32.8 μg/L, with selenate as the major constituent. Total selenium concentrations in other environmental matrices varied widely among drains, with one drain (Trifolium 18) exhibiting especially high concentrations in detritus, 5.98–58.0 μg Se/g; midge larvae, 12.7–50.6 μg Se/g; mosquitofish, 13.2–20.2 μg Se/g; and mollies, 12.8–30.4 μg Se/g (all tissue concentrations are based on dry weights). Although toxic thresholds for selenium in fishes from the Salton Sea are still poorly understood, available evidence suggests that ambient concentrations of this element may not be sufficiently elevated to adversely affect reproductive success and survival in selenium-tolerant poeciliids and pupfish.

The Effect of a Receding Saline Lake (The Salton Sea) on Airborne Particulate Matter Composition.

PubMed

Frie, Alexander L; Dingle, Justin H; Ying, Samantha C; Bahreini, Roya

2017-08-01

The composition of ambient particulate matter (PM) and its sources were investigated at the Salton Sea, a shrinking saline lake in California. To investigate the influence of playa exposure on PM composition, PM samples were collected during two seasons and at two sites around the Salton Sea. To characterize source composition, soil samples were collected from local playa and desert surfaces. PM and soil samples were analyzed for 15 elements using mass spectrometry and X-ray diffraction. The contribution of sources to PM mass and composition was investigated using Al-referenced enrichment factors (EFs) and source factors resolved from positive matrix factorization (PMF). Playa soils were found to be significantly enriched in Ca, Na, and Se relative to desert soils. PMF analysis resolved the PM 10 data with four source factors, identified as Playa-like, Desert-like, Ca-rich, and Se. Playa-like and desert-like sources were estimated to contribute to a daily average of 8.9% and 45% of PM 10 mass, respectively. Additionally, playa sources were estimated to contribute to 38-68% of PM 10 Na. PM 10 Se concentrations showed strong seasonal variations, suggesting a seasonal cycle of Se volatilization and recondensation. These results support the importance of playas as a source of PM mass and a controlling factor of PM composition.

Selenium concentrations in irrigation drain inflows to the Salton Sea, California, October 2006 and January 2007

USGS Publications Warehouse

May, Thomas W.; Walther, Mike W.; Brumbaugh, William G.

2007-01-01

This report presents raw data on selenium concentrations in samples of water, sediment, detritus, and selected food-chain matrices collected from selected agricultural drains in the southern portion of the Salton Sea during October 2006 and January 2007. Total selenium and selenium species were determined in water samples, whereas total selenium was determined in sediment, detritus, algae, plankton, midge larvae (Family Chironomidae), and two fish species (western mosquitofish, Gambusia affinis, and sailfin molly, Poecilia latipinna).

48 CFR 452.215-71 - Instructions for the Preparation of Technical and Business Proposals.

Code of Federal Regulations, 2010 CFR

2010-10-01

... contained in the technical proposal so that the contractor's understanding of the statement of work may be... required if appropriate.) (2) Business Proposal. (a) Furnish financial statements for the last two years... specified in the statement of work. Any “alternate” proposal may be considered if overall performance would...

Spatial and temporal assessment of environmental contaminants in water, sediments and fish of the Salton Sea and its two primary tributaries, California, USA, from 2002 to 2012.

PubMed

Xu, Elvis Genbo; Bui, Cindy; Lamerdin, Cassandra; Schlenk, Daniel

2016-07-15

The Salton Sea, the largest inland surface water body in California, has been designated as a sensitive ecological area by federal and state governments. Its two main tributaries, the New River and Alamo River are impacted by urban and agriculture land use wastes. The purpose of this study was to temporally and spatially evaluate the ecological risks of contaminants of concern in water, sediments and fish tissues. A total of 229 semivolatile organic compounds and 12 trace metals were examined. Among them Selenium, DDTs, PAHs, PCBs, chlorpyrifos and some current-use pesticides such as pyrethroids exceeded risk thresholds. From 2002 to 2012, measurements of chlorpyrifos in sediments generally declined and were not observed after 2009 at the river outlets. In contrast, pyrethroid concentrations in sediments rose consistently after 2009. In water samples, the outlets of the two rivers showed relatively higher levels of contamination than the main water body of the Salton Sea. However, sediments of the main water body of the Salton Sea showed relatively higher sediment concentrations of contaminants than the two rivers. This was particularly true for selenium which showed reductions in concentrations from 2002 to 2007, but then gradual increases to 2012. Consistent with water evaluations, contaminant concentrations in fish tissues tended to be higher at the New River boundary and at the drainage sites for the Alamo River compared to sites along each river. The persistent contaminants DDTs, PAHs, chlorpyrifos and several pyrethroid insecticides were associated with the toxicity of sediments and water collected from the rivers. Overall, assessment results suggested potential ecological risk in sediments of the Salton Sea as well as in water and fish from the two rivers. Copyright © 2016 Elsevier B.V. All rights reserved.

76 FR 45589 - Notice of Submission of Proposed Information Collection to OMB; Application for Technical...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-29

...: Application for Technical Assistance for Community Planning and Development (CPD) Programs. OMB Approval... DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT [Docket No. FR-5480-N-71] Notice of Submission of Proposed Information Collection to OMB; Application for Technical Assistance for Community Planning and...

76 FR 31356 - Notice of Proposed Information Collection for Public Comment; Technical Assistance Experience...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-31

... Matrices AGENCY: Office of the Community Planning and Development. ACTION: Notice of proposed information..., Expertise, and Awards Received Matrices. Description of the need for the information proposed: The Technical Assistance Experience, Expertise, and Awards Received Matrices will allow the Office of Special Needs...

Occurrence of west nile virus infection in raptors at the Salton Sea, California.

PubMed

Dusek, Robert J; Iko, William M; Hofmeister, Erik K

2010-07-01

We investigated the prevalence of West Nile virus (WNV)-neutralizing antibodies and infectious virus, and the occurrence of overwinter transmission in two raptor species during January and March 2006 at the Salton Sea, Imperial County, California. We captured 208 American Kestrels (Falco sparverius) (January, n=100; March, n=108) and 116 Burrowing Owls (Athene cunicularia) (January, n=52; March, n=64). Laboratory analysis revealed that 83% of American Kestrels and 31% of Burrowing Owls were positive for WNV-neutralizing antibodies. Additionally, two seroconversions were detected in Burrowing Owls between January and March. Infectious WNV, consistent with acute infection, was not detected in any bird.

Occurrence of West Nile virus infection in raptors at the Salton Sea, California

USGS Publications Warehouse

Dusek, Robert J.; Iko, William M.; Hofmeister, Erik K.

2010-01-01

We investigated the prevalence of West Nile virus (WNV)-neutralizing antibodies and infectious virus, and the occurrence of overwinter transmission in two raptor species during January and March 2006 at the Salton Sea, Imperial County, California. We captured 208 American Kestrels (Falco sparverius) (January, n=100; March, n=108) and 116 Burrowing Owls (Athene cunicularia) (January, n=52; March, n=64). Laboratory analysis revealed that 83% of American Kestrels and 31% of Burrowing Owls were positive for WNV-neutralizing antibodies. Additionally, two seroconversions were detected in Burrowing Owls between January and March. Infectious WNV, consistent with acute infection, was not detected in any bird.

23 CFR 636.305 - Can price information be provided to analysts who are reviewing technical proposals?

Code of Federal Regulations, 2013 CFR

2013-04-01

... OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING Proposal Evaluation...? Normally, technical and price proposals are reviewed independently by separate evaluation teams. However...

23 CFR 636.305 - Can price information be provided to analysts who are reviewing technical proposals?

Code of Federal Regulations, 2012 CFR

2012-04-01

... OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING Proposal Evaluation...? Normally, technical and price proposals are reviewed independently by separate evaluation teams. However...

23 CFR 636.305 - Can price information be provided to analysts who are reviewing technical proposals?

Code of Federal Regulations, 2010 CFR

2010-04-01

... OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING Proposal Evaluation...? Normally, technical and price proposals are reviewed independently by separate evaluation teams. However...

23 CFR 636.305 - Can price information be provided to analysts who are reviewing technical proposals?

Code of Federal Regulations, 2014 CFR

2014-04-01

... OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING Proposal Evaluation...? Normally, technical and price proposals are reviewed independently by separate evaluation teams. However...

23 CFR 636.305 - Can price information be provided to analysts who are reviewing technical proposals?

Code of Federal Regulations, 2011 CFR

2011-04-01

... OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING Proposal Evaluation...? Normally, technical and price proposals are reviewed independently by separate evaluation teams. However...

Cultivating Advanced Technical Writing Skills through a Graduate-Level Course on Writing Research Proposals

ERIC Educational Resources Information Center

McCarthy, Brian D.; Dempsey, Jillian L.

2017-01-01

A graduate-level course focused on original research proposals is introduced to address the uneven preparation in technical writing of new chemistry graduate students. This course focuses on writing original research proposals. The general course structure features extensive group discussions, small-group activities, and regular in-class…

76 FR 35231 - Notice of Proposed Information Collection for Public Comment; McKinney-Vento Technical Assistance...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-16

... Information Collection for Public Comment; McKinney-Vento Technical Assistance Narrative, Matrices, and... Narrative, Matrices, and Reporting Requirements. Description of the need for the information proposed: McKinney- Vento Technical Assistance (MV-TA) Narrative, Matrices, and Reporting Requirements will allow the...

In-Flight Validation of Mid and Thermal Infrared Remotely Sensed Data Using the Lake Tahoe and Salton Sea Automated Validation Sites

NASA Technical Reports Server (NTRS)

Hook, Simon J.

2008-01-01

The presentation includes an introduction, Lake Tahoe site layout and measurements, Salton Sea site layout and measurements, field instrument calibration and cross-calculations, data reduction methodology and error budgets, and example results for MODIS. Summary and conclusions are: 1) Lake Tahoe CA/NV automated validation site was established in 1999 to assess radiometric accuracy of satellite and airborne mid and thermal infrared data and products. Water surface temperatures range from 4-25C.2) Salton Sea CA automated validation site was established in 2008 to broaden range of available water surface temperatures and atmospheric water vapor test cases. Water surface temperatures range from 15-35C. 3) Sites provide all information necessary for validation every 2 mins (bulk temperature, skin temperature, air temperature, wind speed, wind direction, net radiation, relative humidity). 4) Sites have been used to validate mid and thermal infrared data and products from: ASTER, AATSR, ATSR2, MODIS-Terra, MODIS-Aqua, Landsat 5, Landsat 7, MTI, TES, MASTER, MAS. 5) Approximately 10 years of data available to help validate AVHRR.

Historical Fluxes of Toxic Trace Elements and Associated Implications in the Salton Sea Basin

NASA Astrophysics Data System (ADS)

Odigie, K. O.; Hardisty, D. S.; Geraci, J. B.; Lyons, T. W.

2017-12-01

The Salton Sea is a polymictic, hypersaline lake that is predominantly sustained by wastewater and agricultural runoff from Mexico and the United States. It is a terminal lake that acts as a net sink for toxicants, which in addition to nutrients and increasing salinity, have dramatically transformed the lake over the past century. However, the impacts of these changes on the cycling and bio-accessibility of toxic elements and compounds and their associated human and environmental health implications are not well understood. This project aims to measure and model the fluxes of toxic elements, including selenium, lead, and mercury, in the lake over temporal and spatial scales by using geochemical data from the analysis of sediment cores, a pervasive salt crust, and the water column. The project also aims to elucidate the bio-accessibility and depositional environments of these elements. Preliminary results highlight two different oxygen concentration regimes in the lake: an increasingly anoxic condition in the bottom of the northern lobe and a seasonally variable oxygen deficiency in the bottom of the southern lobe. The deteriorating conditions at the lake could be exacerbated by a receding shoreline, which has already exposed several square kilometres of lake bed and is expected to continue as future inflows are diverted under the Quantification Settlement Agreement. Continued water conservation by Imperial Valley farmers and the increasing reuse of reclaimed water by Mexico are also expected to contribute to reduced inflows to the lake. Therefore, improved understanding of the cycling of toxic elements and their potential remobilization, including via wind entrainment (dust) associated with lake desiccation, will be valuable in protecting human and environmental health within the Salton Sea basin.

Sources of subsidence at the Salton Sea Geothermal Field

USGS Publications Warehouse

Barbour, Andrew J.; Evans, Eileen; Hickman, Stephen H.; Eneva, Mariana

2016-01-01

At the Salton Sea Geothermal Field (SSGF) in Southern California, surface deformation associated with geologic processes including sediment compaction, tectonic strain, and fault slip may be augmented by energy production activities. Separating the relative contributions from natural and anthropogenic sources is especially important at the SSGF, which sits at the apex of a complex tectonic transition zone connecting the southern San Andreas Fault with the Imperial Fault; but this has been a challenging task so far. Here we analyze vertical surface velocities obtained from the persistent scatterer InSAR method and find that two of the largest subsidence anomalies can be represented by a set of volumetric strain nuclei at depths comparable to geothermal well completion zones. In contrast, the rates needed to achieve an adequate fit to the magnitudes of subsidence are almost an order of magnitude greater than rates reported for annual changes in aggregate net-production volume, suggesting that the physical mechanism responsible for subsidence at the SSGF is a complicated interplay between natural and anthropogenic sources.

Anthropogenic seismicity rates and operational parameters at the Salton Sea Geothermal Field.

PubMed

Brodsky, Emily E; Lajoie, Lia J

2013-08-02

Geothermal power is a growing energy source; however, efforts to increase production are tempered by concern over induced earthquakes. Although increased seismicity commonly accompanies geothermal production, induced earthquake rate cannot currently be forecast on the basis of fluid injection volumes or any other operational parameters. We show that at the Salton Sea Geothermal Field, the total volume of fluid extracted or injected tracks the long-term evolution of seismicity. After correcting for the aftershock rate, the net fluid volume (extracted-injected) provides the best correlation with seismicity in recent years. We model the background earthquake rate with a linear combination of injection and net production rates that allows us to track the secular development of the field as the number of earthquakes per fluid volume injected decreases over time.

Metamorphosed Plio-Pleistocene evaporites and the origins of hypersaline brines in the Salton Sea geothermal system, California: Fluid inclusion evidence

NASA Astrophysics Data System (ADS)

McKibben, Michael A.; Williams, Alan E.; Okubo, Susumu

1988-05-01

The Salton Sea geothermal system (SSGS) occurs in Plio-Pleistocene deltaic-lacustrine-evaporite sediments deposited in the Salton Trough, an active continental rift zone. Temperatures up to 365°C and hypersaline brines with up to 26 wt.% TDS are encountered at 1-3 km depth in the sediments, which are undergoing active greenschist facies hydrothermal metamorphism. Previous models for the origins of the Na-Ca-K-Cl brines have assumed that the high salinities were derived mainly from the downward percolation of cold, dense brines formed by low-temperature dissolution of shallow non-marine evaporites. New drillcores from the central part of the geothermal field contain metamorphosed, bedded evaporites at 1 km depth consisting largely of hornfelsic anhydrite interbedded with anhydrite-cemented solution-collapse shale breccias. Fluid inclusions trapped within the bedded and breccia-cementing anhydrite homogenize at 300°C (identical to the measured downhole temperature) and contain saline Na-Ca-K-Cl brines. Some of the inclusions contain up to 50 vol.% halite, sylvite and carbonate crystals at room temperature, and some halite crystals persist to above 300°C upon laboratory heating. The data are consistent with the trapping of halite-saturated Na-Ca-K-Cl fluids during hydrothermal metamorphism of the evaporites and accompanying solution collapse of interbedded shales. We conclude that many of the salt crystals in inclusions are the residuum of bedded evaporitic salt that was dissolved during metamorphism by heated connate fluids. Therefore, the high salinities of the Salton Sea geothermal brines are derived in part from the in situ hydrothermal metamorphism and dissolution of halides and CaSO 4 from relatively deeply-buried lacustrine evaporites. This fact places important constraints on modeling fluid-flow in the SSGS, as brines need not have migrated over great distances. The brines have been further modified to their present complex Na-Ca-K-Fe-Mn-Cl compositions by

Occurrence, distribution and transport of pesticides into the Salton Sea Basin, California, 2001-2002

USGS Publications Warehouse

LeBlanc, L.A.; Kuivila, K.M.

2008-01-01

The Salton Sea is a hypersaline lake located in southeastern California. Concerns over the ecological impacts of sediment quality and potential human exposure to dust emissions from exposed lakebed sediments resulting from anticipated shrinking of shoreline led to a study of pesticide distribution and transport within the Salton Sea Basin, California, in 2001-2002. Three sampling stations-upriver, river mouth, and offshore-were established along each of the three major rivers that discharge into the Salton Sea. Large-volume water samples were collected for analysis of pesticides in water and suspended sediments at the nine sampling stations. Samples of the bottom sediment were also collected at each site for pesticide analysis. Sampling occurred in October 2001, March-April 2002, and October 2002, coinciding with the regional fall and spring peaks in pesticide use in the heavily agricultural watershed. Fourteen current-use pesticides were detected in water and the majority of dissolved concentrations ranged from the limits of detection to 151 ng/l. Diazinon, EPTC and malathion were detected at much higher concentrations (940-3,830 ng/l) at the New and Alamo River upriver and near-shore stations. Concentrations of carbaryl, dacthal, diazinon, and EPTC were higher in the two fall sampling periods, whereas concentrations of atrazine, carbofuran, and trifluralin were higher during the spring, which matched seasonal use patterns of these pesticides. Current-use pesticides were also detected on suspended and bed sediments in concentrations ranging from detection limits to 106 ng/g. Chlorpyrifos, dacthal, EPTC, trifluralin, and DDE were the most frequently detected pesticides on sediments from all three rivers. The number of detections and concentrations of suspended sediment-associated pesticides were often similar for the river upriver and near-shore sites, consistent with downstream transport of pesticides via suspended sediment. While detectable suspended sediment

Investigations of a large scale eared grebe (Podiceps nigricollis) die-off at the Salton Sea, California in 1992

USGS Publications Warehouse

Meteyer, C.U.; Audet, D.J.; Rocke, T.E.; Radke, W.; Creekmore, L.H.; Duncan, R.

2004-01-01

An estimated 150,000 Eared Grebes (Podiceps nigricollis) died at the Salton Sea between 16 December 1991 and 21 April 1992. This represented the largest documented mortality event of Eared Grebes at the time and approximately 6% of the North American population. During the die-off, grebes exhibited several uncharacteristic behaviors, such as congregating at freshwater tributaries, repeatedly gulping freshwater, preening excessively, moving onto land, and allowing close approach and/or capture. Avian cholera was diagnosed in Eared Grebes collected along the north and west shoreline of the Sea late in the die-off but not from the majority of the Eared Grebes dying along the south shore. Gross and histological examinations and diagnostic testing for viruses, bacteria, and parasites did not identify the cause of mortality in the majority of Eared Grebes examined from the south shore of the Sea. Liver concentrations of arsenic, chromium, DDE, mercury, selenium, and zinc were elevated in some Eared Grebes, but none of those contaminants exceeded known thresholds for independent lethality. Poisoning by heavy metals, organochlorine, organophosphorus, or carbamate pesticides, avian botulism, and salt were ruled out as the cause of mortality. Hypotheses for the die-off are interactive effects of contaminants, immunosuppression, a yet unidentified biotoxin or pathogen present in the Salton Sea, impairment of feather waterproofing leading to hypothermia, or a unique manifestation of avian cholera that evades laboratory detection.

Dissolved pesticides in the Alamo River and the Salton Sea, California, 1996-97

USGS Publications Warehouse

Crepeau, Kathryn L.; Kuivila, Kathryn; Bergamaschi, Brian A.

2002-01-01

Water samples were collected from the Alamo River and the Salton Sea, California, in autumn 1996 and late winter/early spring 1997 and analyzed for dissolved pesticides. The two seasons chosen for sampling were during pesticide application periods in the Imperial Valley. Pesticide concentrations were measured in filtered water samples using solid-phase extraction and analyzed by gas chromatography/mass spectrometry. Generally, the highest concentrations were measured in the Alamo River. The concentrations of carbaryl, chlorpyrifos, cycloate, dacthal, diazinon, and eptam were highest in samples collected in autumn 1996. In contrast, the concentrations of atrazine, carbofuran, and malathion were highest in samples collected in late winter/early spring 1997. The highest concentrations measured of atrazine, carbofuran, dacthal, eptam, and malathion all exceeded 1,000 nanograms per liter.

Hydrogen sulfide production and volatilization in a polymictic eutrophic saline lake, Salton Sea, California.

PubMed

Reese, Brandi Kiel; Anderson, Michael A; Amrhein, Christopher

2008-11-15

The Salton Sea is a large shallow saline lake located in southern California that is noted for high sulfate concentrations, substantial algal productivity, and very warm water column temperatures. These conditions are well-suited for sulfide production, and sulfide has been implicated in summer fish kills, although no studies have been conducted to specifically understand hydrogen sulfide production and volatilization there. Despite polymictic mixing patterns and relatively short accumulation periods, the amount of sulfide produced is comparable to meromictic lakes. Sulfide levels in the Salton Sea reached concentrations of 1.2 mmol L(-1) of total free sulfide in the hypolimnion and 5.6 mmol L(-1) in the sediment pore water. Strong winds in late July mixed H2S into the surface water, where it depleted the entire water column of dissolved oxygen and reached a concentration of 0.1 mmol L(-1). Sulfide concentrations exceeded the toxicity threshold of tilapia (Oreochromis mossambicus) and combined with strong anoxia throughout the water column, resulted in a massive fish kill. The mixing of sulfide into the surface waters also increased atmospheric H2S concentrations, reaching 1.0 micromol m(-3). The flux of sulfide from the sediment into the water column was estimated to range from 2-3 mmol m(-2) day(-1) during the winter and up to 8 mmol m(-2) day(-1) during the summer. Application of the two-layer model for volatilization indicates that up to 19 mmol m(-2) day(-1) volatilized from the surface during the mixing event. We estimate that as much as 3400 Mg year(-1) or approximately 26% of sulfide that diffused into the water column from the deepest sediments may have been volatilized to the atmosphere.

Borehole-explosion and air-gun data acquired in the 2011 Salton Seismic Imaging Project (SSIP), southern California: description of the survey

USGS Publications Warehouse

Rose, Elizabeth J.; Fuis, Gary S.; Stock, Joann M.; Hole, John A.; Kell, Annie M.; Kent, Graham; Driscoll, Neal W.; Goldman, Mark; Reusch, Angela M.; Han, Liang; Sickler, Robert R.; Catchings, Rufus D.; Rymer, Michael J.; Criley, Coyn J.; Scheirer, Daniel S.; Skinner, Steven M.; Slayday-Criley, Coye J.; Murphy, Janice M.; Jensen, Edward G.; McClearn, Robert; Ferguson, Alex J.; Butcher, Lesley A.; Gardner, Max A.; Emmons, Iain; Loughran, Caleb L.; Svitek, Joseph R.; Bastien, Patrick C.; Cotton, Joseph A.; Croker, David S.; Harding, Alistair J.; Babcock, Jeffrey M.; Harder, Steven H.; Rosa, Carla M.

2013-01-01

The Imperial and Coachella Valleys are being formed by active plate-tectonic processes. From the Imperial Valley southward into the Gulf of California, plate motions are rifting the continent apart. In the Coachella Valley, the plates are sliding past one another along the San Andreas and related faults (fig. 1). These processes build the stunning landscapes of the region, but also produce damaging earthquakes. Rupture of the southern section of the San Andreas Fault (SAF), from the Coachella Valley to the Mojave Desert, is believed to be the greatest natural hazard that California will face in the near future. With an estimated magnitude between 7.2 and 8.1, such an event would result in violent shaking, loss of life, and disruption of infrastructure (freeways, aqueducts, power, petroleum, and communication lines) that might bring much of southern California to a standstill. As part of the nation’s efforts to avert a catastrophe of this magnitude, a number of projects have been undertaken to more fully understand and mitigate the effects of such an event. The Salton Seismic Imaging Project (SSIP), funded jointly by the National Science Foundation (NSF) and the U.S. Geological Survey (USGS), seeks to understand, through seismic imaging, the structure of the Earth surrounding the SAF, including the sedimentary basins on which cities are built. The principal investigators (PIs) of this collaborative project represent the USGS, Virginia Polytechnic Institute and State University (Virginia Tech), California Institute of Technology (Caltech), Scripps Institution of Oceanography (Scripps), University of Nevada, Reno (UNR), and Stanford University. SSIP will create images of underground structure and sediments in the Imperial and Coachella Valleys and adjacent mountain ranges to investigate the earthquake hazards posed to cities in this area. Importantly, the images will help determine the underground geometry of the SAF, how deep the sediments are, and how fast

76 FR 33193 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-08

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Change to....S. Department of Agriculture. ACTION: Notice of Availability of proposed changes in the Virginia... Conservationist for Virginia that changes must be made in the NRCS State Technical Guide specifically in practice...

Occurrence, distribution, and transport of pesticides, trace elements, and selected inorganic constituents into the Salton Sea Basin, California, 2001-2002

USGS Publications Warehouse

LeBlanc, Lawrence A.; Schroeder, Roy A.; Orlando, James L.; Kuivila, Kathyrn M.

2004-01-01

A study of pesticide distribution and transport within the Salton Sea Basin, California, was conducted from September 2001 to October 2002. Sampling for the study was done along transects for the three major rivers that flow into the Salton Sea Basin: the New and Alamo Rivers at the southern end of the basin and the Whitewater River at the northern end. Three stations were established on each river: an outlet station approximately 1 mile upstream of the river discharge, a near-shore station in the river delta, and off-shore station in the Salton Sea. Water and suspended and bed sediments were collected at each station in October 2001, March-April 2002, and September 2002, coinciding with peak pesticide applications in the fall and spring. Fourteen current-use pesticides were detected in the water column. Concentrations of dissolved pesticides typically decreased from the outlets to the sea in all three rivers, consistent with the off-shore transport of pesticides from the rivers to the sea. Dissolved concentrations ranged from the limits of detection to 151 nanograms per liter (ng/L); however, diazinon, eptam (EPTC), and malathion were detected at much higher concentrations (940?3,830 ng/L) at the New and Alamo River outlet and near-shore stations. Concentrations of carbaryl, dacthal, diazinon, and eptam were higher during the two fall sampling periods, whereas concentrations of atrazine, carbofuran, and trifluralin were higher during the spring. Current-use pesticides also were detected on suspended and bed sediments in concentrations ranging from method detection limits to 106 ng/g (nanograms per gram). Chlorpyrifos, dacthal, eptam, trifluralin, and DDE were the most frequently detected pesticides on sediments from all three rivers. The number and concentrations of pesticides associated with suspended sediments frequently were similar for the river outlet and near-shore sites, consistent with the downstream transport of sediment-associated pesticides out of the

76 FR 23641 - Proposed Information Collection: Export Declaration of Defense Technical Data or Services

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-27

... DEPARTMENT OF STATE [Public Notice: 7431] Proposed Information Collection: Export Declaration of Defense Technical Data or Services AGENCY: Department of State. ACTION: Notice of request for public..., Directorate of Defense Trade Controls, Bureau of Political-Military Affairs, U.S. Department of State...

A comparison of long-term changes in seismicity at The Geysers, Salton Sea, and Coso geothermal fields

NASA Astrophysics Data System (ADS)

Trugman, Daniel T.; Shearer, Peter M.; Borsa, Adrian A.; Fialko, Yuri

2016-01-01

Geothermal energy is an important source of renewable energy, yet its production is known to induce seismicity. Here we analyze seismicity at the three largest geothermal fields in California: The Geysers, Salton Sea, and Coso. We focus on resolving the temporal evolution of seismicity rates, which provides important observational constraints on how geothermal fields respond to natural and anthropogenic loading. We develop an iterative, regularized inversion procedure to partition the observed seismicity rate into two components: (1) the interaction rate due to earthquake-earthquake triggering and (2) the smoothly varying background rate controlled by other time-dependent stresses, including anthropogenic forcing. We apply our methodology to compare long-term changes in seismicity to monthly records of fluid injection and withdrawal. At The Geysers, we find that the background seismicity rate is highly correlated with fluid injection, with the mean rate increasing by approximately 50% and exhibiting strong seasonal fluctuations following construction of the Santa Rosa pipeline in 2003. In contrast, at both Salton Sea and Coso, the background seismicity rate has remained relatively stable since 1990, though both experience short-term rate fluctuations that are not obviously modulated by geothermal plant operation. We also observe significant temporal variations in Gutenberg-Richter b value, earthquake magnitude distribution, and earthquake depth distribution, providing further evidence for the dynamic evolution of stresses within these fields. The differing field-wide responses to fluid injection and withdrawal may reflect differences in in situ reservoir conditions and local tectonics, suggesting that a complex interplay of natural and anthropogenic stressing controls seismicity within California's geothermal fields.

78 FR 52963 - 60-Day Notice of Proposed Information Collection: Technical Processing Requirements for...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-27

... Information Collection: Technical Processing Requirements for Multifamily Project Mortgage Insurance AGENCY...: HUD is seeking approval from the Office of Management and Budget (OMB) for the information collection... interested parties on the proposed collection of information. The purpose of this notice is to allow for 60...

78 FR 3921 - Proposed Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler TSTF...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-17

... Specifications Combustion Engineering Plants.'' Specifically, the proposed change revises various TSs to add a... Technical Details TSTF-426, Revision 5, is applicable to all Combustion Engineering- designed nuclear power...

Subsurface geometry of the San Andreas fault in southern California: Results from the Salton Seismic Imaging Project (SSIP) and strong ground motion expectations

USGS Publications Warehouse

Fuis, Gary S.; Bauer, Klaus; Goldman, Mark R.; Ryberg, Trond; Langenheim, Victoria; Scheirer, Daniel S.; Rymer, Michael J.; Stock, Joann M.; Hole, John A.; Catchings, Rufus D.; Graves, Robert; Aagaard, Brad T.

2017-01-01

The San Andreas fault (SAF) is one of the most studied strike‐slip faults in the world; yet its subsurface geometry is still uncertain in most locations. The Salton Seismic Imaging Project (SSIP) was undertaken to image the structure surrounding the SAF and also its subsurface geometry. We present SSIP studies at two locations in the Coachella Valley of the northern Salton trough. On our line 4, a fault‐crossing profile just north of the Salton Sea, sedimentary basin depth reaches 4 km southwest of the SAF. On our line 6, a fault‐crossing profile at the north end of the Coachella Valley, sedimentary basin depth is ∼2–3  km">∼2–3  km and centered on the central, most active trace of the SAF. Subsurface geometry of the SAF and nearby faults along these two lines is determined using a new method of seismic‐reflection imaging, combined with potential‐field studies and earthquakes. Below a 6–9 km depth range, the SAF dips ∼50°–60°">∼50°–60° NE, and above this depth range it dips more steeply. Nearby faults are also imaged in the upper 10 km, many of which dip steeply and project to mapped surface fault traces. These secondary faults may join the SAF at depths below about 10 km to form a flower‐like structure. In Appendix D, we show that rupture on a northeast‐dipping SAF, using a single plane that approximates the two dips seen in our study, produces shaking that differs from shaking calculated for the Great California ShakeOut, for which the southern SAF was modeled as vertical in most places: shorter‐period (T<1  s">T<1  s) shaking is increased locally by up to a factor of 2 on the hanging wall and is decreased locally by up to a factor of 2 on the footwall, compared to shaking calculated for a vertical fault.

Strike-slip Fault Structure in the Salton Trough and Deformation During and After the 2010 M7.2 El Mayor-Cucapah Earthquake from Geodetic and Seismic Data

NASA Astrophysics Data System (ADS)

Fielding, E. J.; Sun, J.; Gonzalez-Ortega, A.; González-Escobar, M.; Freed, A. M.; Burgmann, R.; Samsonov, S. V.; Gonzalez-Garcia, J.; Fletcher, J. M.; Hinojosa, A.

2013-12-01

The Pacific-North America plate boundary character changes southward from the strike-slip and transpressional configuration along most of California to oblique rifting in the Gulf of California, with a transitional zone of transtension beneath the Salton Trough in southernmost California and northern Mexico. The Salton Trough is characterized by extremely high heat flow and thin lithosphere with a thick fill of sedimentary material delivered by the Colorado River during the past 5-6 million years. Because of the rapid sedimentation, most of the faults in Salton Trough are buried and reveal themselves when they slip either seismically or aseismically. They can also be located by refraction and reflection of seismic waves. The 4 April 2010 El Mayor-Cucapah earthquake (Mw 7.2) in Baja California and Sonora, Mexico is probably the largest earthquake in the Salton Trough for at least 120 years, and had primarily right-lateral strike-slip motion. The earthquake ruptured a complex set of faults that lie to the west of the main plate boundary fault, the Cerro Prieto Fault, and shows that the strike-slip fault system in the southern Salton Trough has multiple sub-parallel active faults, similar to southern California. The Cerro Prieto Fault is still likely absorbing the majority of strain in the plate boundary. We study the coseismic and postseismic deformation of the 2010 earthquake with interferometric analysis of synthetic aperture radar (SAR) images (InSAR) and pixel tracking by subpixel correlation of SAR and optical images. We combine sampled InSAR and subpixel correlation results with GPS (Global Positioning System) offsets at PBO (Plate Boundary Observatory) stations to estimate the likely subsurface geometry of the major faults that slipped during the earthquake and to derive a static coseismic slip model. We constrained the surface locations of the fault segments to mapped locations in the Sierra Cucapah to the northwest of the epicenter. SAR along-track offsets

Response in the water quality of the Salton Sea, California, to changes in phosphorus loading: An empirical modeling approach

USGS Publications Warehouse

Robertson, Dale M.; Schladow, S.G.

2008-01-01

Salton Sea, California, like many other lakes, has become eutrophic because of excessive nutrient loading, primarily phosphorus (P). A Total Maximum Daily Load (TMDL) is being prepared for P to reduce the input of P to the Sea. In order to better understand how P-load reductions should affect the average annual water quality of this terminal saline lake, three different eutrophication programs (BATHTUB, WiLMS, and the Seepage Lake Model) were applied. After verifying that specific empirical models within these programs were applicable to this saline lake, each model was calibrated using water-quality and nutrient-loading data for 1999 and then used to simulate the effects of specific P-load reductions. Model simulations indicate that a 50% decrease in external P loading would decrease near-surface total phosphorus concentrations (TP) by 25-50%. Application of other empirical models demonstrated that this decrease in loading should decrease near-surface chlorophyll a concentrations (Chl a) by 17-63% and increase Secchi depths (SD) by 38-97%. The wide range in estimated responses in Chl a and SD were primarily caused by uncertainty in how non-algal turbidity would respond to P-load reductions. If only the models most applicable to the Salton Sea are considered, a 70-90% P-load reduction is required for the Sea to be classified as moderately eutrophic (trophic state index of 55). These models simulate steady-state conditions in the Sea; therefore, it is difficult to ascertain how long it would take for the simulated changes to occur after load reductions. ?? 2008 Springer Science+Business Media B.V.

76 FR 23970 - Notice of Proposed Changes to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-29

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Changes to Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U..., 395, Stream Habitat Improvement and Management, 422, Hedgerow Planting, 643, Restoration and...

Host selection patterns of Culex tarsalis (Diptera: Culicidae) at wetlands near the Salton Sea, Coachella Valley, California, 1998-2002.

PubMed

Reisen, William K; Lothrop, Hugh D; Thiemann, Tara

2013-09-01

The bloodmeal hosts used by Culex tarsalis Coquillett collected along the Salton Sea in Coachella Valley, CA, during 1998-2002 were identified using sequences of the cytochrome c oxidase I gene identified from Barcode of Life database. Overall, 265 (83.3%) of 318 bloodmeals were identified, of which 76.6% fed on birds, 18.1% on mammals, and 5.3% on reptiles. Forty-seven different hosts were identified, none of which comprised > 12.5% of the total. Although Cx. tarsalis exhibits specific host-seeking flight patterns, bloodmeals seemed to be acquired opportunistically, thereby limiting potential arbovirus transmission efficiency in species-rich environments.

Experimental evaluation of atmospheric effects on radiometric measurements using the EREP of Skylab. [Salton Sea and Great Salt Lake

NASA Technical Reports Server (NTRS)

Chang, D. T. (Principal Investigator); Isaacs, R. G.

1975-01-01

The author has identified the following significant results. Test sites were located near the Great Salt Lake and the Salton Sea. Calculations were performed for a set of atmospheric models corresponding to the test sites, in addition to standard models for summer and winter midlatitude atmospheres with respective integrated water vapor amount of 2.4 g/sq cm and 0.9 g/sq cm. Each atmosphere was found to contain an average amount of continental aerosol. Computations were valid for high solar elevation angles. Atmospheric attenuation quantities were computed in addition to simulated EREP S192 radiances.

76 FR 59382 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-26

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Change to Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U... Harvest Management, 657, Wetland Restoration, 658, Wetland Creation, and 659, Wetland Enhancement. These...

Air Quality Modeling Technical Support Document for the 2008 Ozone NAAQS Cross-State Air Pollution Rule Proposal

EPA Pesticide Factsheets

In this technical support document (TSD) we describe the air quality modeling performed to support the proposed Cross-State Air Pollution Rule for the 2008 ozone National Ambient Air Quality Standards (NAAQS)

76 FR 7810 - Notice of Proposed Change to Section I of the South Dakota and North Dakota State Technical Guides

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-11

... must be made to the NRCS State Technical Guides concerning State wetland mapping conventions. The two States are proposing to issue joint State wetland mapping conventions. The joint State wetland mapping conventions will be used as part of the technical documents to conduct wetland determinations on agriculture...

75 FR 34974 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-21

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Change to Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U... Road, Suite 209, Richmond, Virginia 23229-5014; Telephone number (804) 287-1691; Fax number (804) 287...

77 FR 55180 - Notice of Proposed Changes to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-07

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Changes to Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U..., Virginia 23229-5014; Telephone number (804) 287-1691 or [email protected] Copies of the practice...

Faults on Skylab imagery of the Salton Trough area, Southern California

NASA Technical Reports Server (NTRS)

Merifield, P. M.; Lamar, D. L. (Principal Investigator)

1975-01-01

The author has identified the following significant results. Large segments of the major high angle faults in the Salton Trough area are readily identifiable in Skylab images. Along active faults, distinctive topographic features such as scarps and offset drainage, and vegetation differences due to ground water blockage in alluvium are visible. Other fault-controlled features along inactive as well as active faults visible in Skylab photography include straight mountain fronts, linear valleys, and lithologic differences producing contrasting tone, color or texture. A northwestern extension of a fault in the San Andreas set, is postulated by the regional alignment of possible fault-controlled features. The suspected fault is covered by Holocene deposits, principally windblown sand. A northwest trending tonal change in cultivated fields across Mexicali Valley is visible on Skylab photos. Surface evidence for faulting was not observed; however, the linear may be caused by differences in soil conditions along an extension of a segment of the San Jacinto fault zone. No evidence of faulting could be found along linears which appear as possible extensions of the Substation and Victory Pass faults, demonstrating that the interpretation of linears as faults in small scale photography must be corroborated by field investigations.

Detailed study of water quality, bottom sediment, and biota associated with irrigation drainage in the Salton Sea area, California, 1988-90

USGS Publications Warehouse

Setmire, J.G.; Schroeder, R.A.; Densmore, J.N.; Goodbred, S.O.; Audet, D.J.; Radke, W.R.

1993-01-01

Results of a detailed study by the National Irrigation Water-Quality Program (NIWQP), U.S. Department of the Interior, indicate that factors controlling contaminant concentrations in subsurface irrigation drainwater in the Imperial Valley are soil characteristics, hydrology, and agricultural practices. Higher contaminant concentrations commonly were associated with clayey soils, which retard the movement of irrigation water and thus increase the degree of evaporative concentration. Regression of hydrogen- and oxygen-isotope ratios in samples collected from sumps yields a linear drainwater evaporation line that extrapolates through the isotopic composition of Colorado River water, thus demonstrating that Colorado River water is the sole source of subsurface drainwater in the Imperial Valley. Ratios of selenium to chloride indicate that selenium present in subsurface drainwater throughout the Imperial Valley originates from the Colorado River. The selenium load discharged to the Salton Sea from the Alamo River, the largest contributor, is about 6.5 tons/yr. Biological sampling and analysis showed that drainwater contaminants, including selenium, boron, and DDE, are accumulating in tissues of migratory and resident birds that use food sources in the Imperial Valley and the Salton Sea. Selenium concentration in fish-eating birds, shorebirds, and the endangered Yuma clapper rail were at levels that could affect reproduction. Boron concentrations in migratory waterfowl and resident shorebirds were at levels that potentially could cause reduced growth in young. As a result of DDE contamination of food sources, waterfowl and fish-eating birds in the Imperial Valley may be experiencing reproductive impairment.

75 FR 47259 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-05

... DEPARTMENT OF AGRICULTURE Natural Resources Conservation Service Notice of Proposed Change to Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U..., Virginia 23229-5014; Telephone number (804) 287-1691; Fax number (804) 287-1737. Copies of the practice...

76 FR 9614 - Notice of Availability of the Proposed Models for Plant-Specific Adoption of Technical...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-18

... NUCLEAR REGULATORY COMMISSION [NRC-2011-0039] Notice of Availability of the Proposed Models for..., ``Technical Specifications End States, NEDC-32988-A,'' for Boiling Water Reactor Plants Using the Consolidated... Availability. SUMMARY: The NRC is announcing the availability of the model application (with model no...

Atmospheric dry deposition in the vicinity of the Salton Sea, California - I: Air pollution and deposition in a desert environment

USGS Publications Warehouse

Alonso, R.; Bytnerowicz, A.; Boarman, W.I.

2005-01-01

Air pollutant concentrations and atmospheric dry deposition were monitored seasonally at the Salton Sea, southern California. Measurements of ozone (O 3), nitric acid vapor (HNO3), ammonia (NH3), nitric oxide (NO), nitrogen dioxide (NO2) and sulfur dioxide (SO 2) were performed using passive samplers. Deposition rates of NO 3-, NH4+, Cl-, SO 42-, Na+, K+ and Ca2+ to creosote bush branches and nylon filters as surrogate surfaces were determined for one-week long exposure periods. Maximum O3 values were recorded in spring with 24-h average values of 108.8 ??g m-3. Concentrations of NO and NO2 were low and within ranges of the non-urban areas in California (0.4-5.6 and 3.3-16.2 ??g m-3 ranges, respectively). Concentrations of HNO3 (2.0-6.7 ??g m-3) and NH 3 (6.4-15.7 ??g m-3) were elevated and above the levels typical for remote locations in California. Deposition rates of Cl-, SO42-, Na+, K+ and Ca2+ were related to the influence of sea spray or to suspended soil particles, and no strong enrichments caused by ions originated by human activities were detected. Dry deposition rates of NO3- and NH4+ were similar to values registered in areas where symptoms of nitrogen saturation and changes in species composition have been described. Deposition of nitrogenous compounds might be contributing to eutrophication processes at the Salton Sea. ?? 2005 Elsevier Ltd. All rights reserved.

77 FR 53903 - Notice of Proposed Information Collection for Public Comment: OneCPD Technical Assistance and...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-04

... Information Collection for Public Comment: OneCPD Technical Assistance and Capacity Building Needs Assessment... Needs Assessment. Description of the need for the information proposed: The OneCPD Needs Assessment will... to identify trends in TA needs across grantees and assist in prioritizing the development of tools...

Lithospheric Structure and Active Deformation in the Salton Trough from Coseismic and Postseismic Models of the 2010 Mw 7.2 El Mayor-Cucapah Earthquake

NASA Astrophysics Data System (ADS)

Fielding, E. J.; Huang, M. H.; Dickinson, H.; Freed, A. M.; Burgmann, R.; Gonzalez-Ortega, J. A.; Andronicos, C.

2016-12-01

The 4 April 2010 Mw 7.2 El Mayor-Cucapah (EMC) Earthquake ruptured about 120 km along several NW-striking faults to the west of the Cerro Prieto Fault in the Salton Trough of Baja California, Mexico. We analyzed interferometric synthetic aperture radar (SAR), SAR and optical pixel offsets, and continuous and campaign GPS data to optimize an EMC coseismic rupture model with 9 fault segments, which fits the complex structure of the faults. Coseismic slip inversion with a layered elastic model shows that largely right-lateral slip is confined to upper 10 km with strong variations along strike. Near-field GPS measures slip on a north-striking normal fault that ruptured at the beginning of the earthquake, previously inferred from seismic waveforms. EMC Earthquake postseismic deformation shows the Earth's response to the large coseismic stress changes. InSAR shows rapid shallow afterslip at the north and south ends of the main ruptures. Continuous GPS from the Plate Boundary Observatory operated by UNAVCO measures the first six years of postseismic deformation, extremely rapid near the rupture. Afterslip on faults beneath the coseismic rupture cannot explain far-field displacements that are best explained by viscoelastic relaxation of the lower crust and upper mantle. We built a viscoelastic 3D finite element model of the lithosphere and asthenosphere based on available data for the region with the EMC coseismic faults embedded inside. Coseismic slip was imposed on the model, allowed to relax for 5 years, and then compared to the observed surface deformation. Systematic exploration of the viscoelastic parameters shows that horizontal and vertical heterogeneity is required to fit the postseismic deformation. Our preferred viscoelastic model has weaker viscosity layers beneath the Salton Trough than adjacent blocks that are consistent with the inferred differences in the geotherms. Defining mechanical lithosphere as rocks that have viscosities greater than 10^19 Pa s (able

Evolution of Toxoplasma-PCR methods and practices: a French national survey and proposal for technical guidelines.

PubMed

Roux, Guillaume; Varlet-Marie, Emmanuelle; Bastien, Patrick; Sterkers, Yvon

2018-06-08

The molecular diagnosis of toxoplasmosis lacks standardisation due to the use of numerous methods with variable performance. This diversity of methods also impairs robust performance comparisons between laboratories. The harmonisation of practices by diffusion of technical guidelines is a useful way to improve these performances. The knowledge of methods and practices used for this molecular diagnosis is an essential step to provide guidelines for Toxoplasma-PCR. In the present study, we aimed (i) to describe the methods and practices of Toxoplasma-PCR used by clinical microbiology laboratories in France and (ii) to propose technical guidelines to improve molecular diagnosis of toxoplasmosis. To do so, a yearly self-administered questionnaire-based survey was undertaken in proficient French laboratories from 2008 to 2015, and guidelines were proposed based on the results of those as well as previously published work. This period saw the progressive abandonment of conventional PCR methods, of Toxoplasma-PCR targeting the B1 gene and of the use of two concomitant molecular methods for this diagnosis. The diversity of practices persisted during the study, in spite of the increasing use of commercial kits such as PCR kits, DNA extraction controls and PCR inhibition controls. We also observed a tendency towards the automation of DNA extraction. The evolution of practices did not always go together with an improvement in those, as reported notably by the declining use of Uracil-DNA Glycosylase to avoid carry-over contamination. We here propose technical recommendations which correspond to items explored during the survey, with respect to DNA extraction, Toxoplasma-PCR and good PCR practices. Copyright © 2018 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.

A deterministic and stochastic velocity model for the Salton Trough/Basin and Range transition zone and constraints on magmatism during rifting

NASA Astrophysics Data System (ADS)

Larkin, Steven P.; Levander, Alan; Okaya, David; Goff, John A.

1996-12-01

As a high resolution addition to the 1992 Pacific to Arizona Crustal Experiment (PACE), a 45-km-long deep crustal seismic reflection profile was acquired across the Chocolate Mountains in southeastern California to illuminate crustal structure in the transition between the Salton Trough and the Basin and Range province. The complex seismic data are analyzed for both large-scale (deterministic) and fine-scale (stochastic) crustal features. A low-fold near-offset common-midpoint (CMP) stacked section shows the northeastward lateral extent of a high-velocity lower crustal body which is centered beneath the Salton Trough. Off-end shots record a high-amplitude diffraction from the point where the high velocity lower crust pinches out at the Moho. Above the high-velocity lower crust, moderate-amplitude reflections occur at midcrustal levels. These reflections display the coherency and frequency characteristics of reflections backscattered from a heterogeneous velocity field, which we model as horizontal intrusions with a von Kármán (fractal) distribution. The effects of upper crustal scattering are included by combining the mapped surface geology and laboratory measurements of exposed rocks within the Chocolate Mountains to reproduce the upper crustal velocity heterogeneity in our crustal velocity model. Viscoelastic finite difference simulations indicate that the volume of mafic material within the reflective zone necessary to produce the observed backscatter is about 5%. The presence of wavelength-scale heterogeneity within the near-surface, upper, and middle crust also produces a 0.5-s-thick zone of discontinuous reflections from a crust-mantle interface which is actually a first-order discontinuity.

Archaeal and bacterial communities respond differently to environmental gradients in anoxic sediments of a California hypersaline lake, the Salton Sea.

PubMed

Swan, Brandon K; Ehrhardt, Christopher J; Reifel, Kristen M; Moreno, Lilliana I; Valentine, David L

2010-02-01

Sulfidic, anoxic sediments of the moderately hypersaline Salton Sea contain gradients in salinity and carbon that potentially structure the sedimentary microbial community. We investigated the abundance, community structure, and diversity of Bacteria and Archaea along these gradients to further distinguish the ecologies of these domains outside their established physiological range. Quantitative PCR was used to enumerate 16S rRNA gene abundances of Bacteria, Archaea, and Crenarchaeota. Community structure and diversity were evaluated by terminal restriction fragment length polymorphism (T-RFLP), quantitative analysis of gene (16S rRNA) frequencies of dominant microorganisms, and cloning and sequencing of 16S rRNA. Archaea were numerically dominant at all depths and exhibited a lesser response to environmental gradients than that of Bacteria. The relative abundance of Crenarchaeota was low (0.4 to 22%) at all depths but increased with decreased carbon content and increased salinity. Salinity structured the bacterial community but exerted no significant control on archaeal community structure, which was weakly correlated with total carbon. Partial sequencing of archaeal 16S rRNA genes retrieved from three sediment depths revealed diverse communities of Euryarchaeota and Crenarchaeota, many of which were affiliated with groups previously described from marine sediments. The abundance of these groups across all depths suggests that many putative marine archaeal groups can tolerate elevated salinity (5.0 to 11.8% [wt/vol]) and persist under the anaerobic conditions present in Salton Sea sediments. The differential response of archaeal and bacterial communities to salinity and carbon patterns is consistent with the hypothesis that adaptations to energy stress and availability distinguish the ecologies of these domains.

Preliminary report on geophysical well-logging activity on the Salton Sea Scientific Drilling Project, Imperial Valley, California

USGS Publications Warehouse

Paillet, Frederick L.; Morin, R.H.; Hodges, H.E.

1986-01-01

The Salton Sea Scientific Drilling Project has culminated in a 10,564-ft deep test well, State 2-14 well, in the Imperial Valley of southern California. A comprehensive scientific program of drilling, coring, and downhole measurements, which was conducted for about 5 months, has obtained much scientific information concerning the physical and chemical processes associated with an active hydrothermal system. This report primarily focuses on the geophysical logging activities at the State 2-14 well and provides early dissemination of geophysical data to other investigators working on complementary studies. Geophysical-log data were obtained by a commercial logging company and by the U.S. Geological Survey (USGS). Most of the commercial logs were obtained during three visits to the site; only one commercial log was obtained below a depth of 6,000 ft. The commercial logs obtained were dual induction, natural gamma, compensated neutron formation density, caliper and sonic. The USGS logging effort consisted of four primary periods, with many logs extending below a depth of 6,000 ft. The USGS logs obtained were temperature, caliper, natural gamma, gamma spectral, epithermal neutron, acoustic velocity, full-waveform, and acoustic televiewer. Various problems occurred throughout the drilling phase of the Salton Sea Scientific Drilling Project that made successful logging difficult: (1) borehole constrictions, possibly resulting from mud coagulation, (2) maximum temperatures of about 300 C, and (3) borehole conditions unfavorable for logging because of numerous zones of fluid loss, cement plugs, and damage caused by repeated trips in and out of the hole. These factors hampered and compromised logging quality at several open-hole intervals. The quality of the logs was dependent on the degree of probe sophistication and sensitivity to borehole-wall conditions. Digitized logs presented were processed on site and are presented in increments of 1,000 ft. A summary of the numerous

Chemistry and geothermometry of brine produced from the Salton Sea Scientific drill hole, Imperial Valley, California

USGS Publications Warehouse

Thompson, J.M.; Fournier, R.O.

1988-01-01

The December 29-30, 1985, flow test of the State 2-14 well, also known as the Salton Sea Scientific drill hole, produced fluid from a depth of 1865-1877 m at a reservoir temperature of 305????5??C. Samples were collected at five different flashing pressures. The brines are Na-Ca-K-Cl-type waters with very high metal and low SO4 and HCO3 contents. Compositions of the flashed brines were normalized relative to the 25??C densities of the solutions, and an ionic charge balance was achieved by adjusting the Na concentration. Calculated Na/K geothermometer temperatures, using equations suggested by different investigators, range from 326?? to 364??C. The Mg/K2 method gives a temperature of about 350??C, Mg/Li2 about 282??, and Na/Li 395??-418??C. -from Authors

77 FR 5616 - Proposed Technical Standard Order (TSO)-C151c, Terrain Awareness and Warning System (TAWS)

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-03

... (TSO)-C151c, Terrain Awareness and Warning System (TAWS) ACTION: Notice of availability and request for... second draft of Technical Standard Order (TSO)- C151c, Terrain Awareness and Warning System. Comments received from the initial June 2011 release, resulted in changes to the proposed document significant...

Relationships among seismic velocity, metamorphism, and seismic and aseismic fault slip in the Salton Sea Geothermal Field region

USGS Publications Warehouse

McGuire, Jeffrey J.; Lohman, Rowena B.; Catchings, Rufus D.; Rymer, Michael J.; Goldman, Mark R.

2015-01-01

The Salton Sea Geothermal Field is one of the most geothermally and seismically active areas in California and presents an opportunity to study the effect of high-temperature metamorphism on the properties of seismogenic faults. The area includes numerous active tectonic faults that have recently been imaged with active source seismic reflection and refraction. We utilize the active source surveys, along with the abundant microseismicity data from a dense borehole seismic network, to image the 3-D variations in seismic velocity in the upper 5 km of the crust. There are strong velocity variations, up to ~30%, that correlate spatially with the distribution of shallow heat flow patterns. The combination of hydrothermal circulation and high-temperature contact metamorphism has significantly altered the shallow sandstone sedimentary layers within the geothermal field to denser, more feldspathic, rock with higher P wave velocity, as is seen in the numerous exploration wells within the field. This alteration appears to have a first-order effect on the frictional stability of shallow faults. In 2005, a large earthquake swarm and deformation event occurred. Analysis of interferometric synthetic aperture radar data and earthquake relocations indicates that the shallow aseismic fault creep that occurred in 2005 was localized on the Kalin fault system that lies just outside the region of high-temperature metamorphism. In contrast, the earthquake swarm, which includes all of the M > 4 earthquakes to have occurred within the Salton Sea Geothermal Field in the last 15 years, ruptured the Main Central Fault (MCF) system that is localized in the heart of the geothermal anomaly. The background microseismicity induced by the geothermal operations is also concentrated in the high-temperature regions in the vicinity of operational wells. However, while this microseismicity occurs over a few kilometer scale region, much of it is clustered in earthquake swarms that last from

Absence of remote earthquake triggering within the Coso and Salton Sea geothermal production fields

NASA Astrophysics Data System (ADS)

Zhang, Qiong; Lin, Guoqing; Zhan, Zhongwen; Chen, Xiaowei; Qin, Yan; Wdowinski, Shimon

2017-01-01

Geothermal areas are long recognized to be susceptible to remote earthquake triggering, probably due to the high seismicity rates and presence of geothermal fluids. However, anthropogenic injection and extraction activity may alter the stress state and fluid flow within the geothermal fields. Here we examine the remote triggering phenomena in the Coso geothermal field and its surrounding areas to assess possible anthropogenic effects. We find that triggered earthquakes are absent within the geothermal field but occur in the surrounding areas. Similar observation is also found in the Salton Sea geothermal field. We hypothesize that continuous geothermal operation has eliminated any significant differential pore pressure between fractures inside the geothermal field through flushing geothermal precipitations and sediments out of clogged fractures. To test this hypothesis, we analyze the pore-pressure-driven earthquake swarms, and they are found to occur outside or on the periphery of the geothermal production field. Therefore, our results suggest that the geothermal operation has changed the subsurface fracture network, and differential pore pressure is the primary controlling factor of remote triggering in geothermal fields.

48 CFR 2415.305 - Proposal evaluation.

Code of Federal Regulations, 2010 CFR

2010-10-01

... technical portion of each proposal to the TEP Chairperson or his or her designee. The cost/price portion of each proposal shall be retained by the Contracting Officer pending initial technical evaluation by the TEP. (3) Technical evaluation. The TEP shall rate each proposal based on the evaluation factors...

Develop a Comprehensive Technical Training and Data Collection Program for Structural Welders and Fitters: Technical Proposal

DTIC Science & Technology

2006-05-30

implementation Final Report 4 TECHNICAL PLAN AND RESULTS Task 1: Initiate the Project Management System Two senior NGSS production management...1 Technical Plan and Results...Third the system is hosted on a handheld unit which provides the foremen with an efficient daily planning tool. The Pilot System which entails

Fault tectonics and earthquake hazards in parts of southern California. [penninsular ranges, Garlock fault, Salton Trough area, and western Mojave Desert

NASA Technical Reports Server (NTRS)

Merifield, P. M. (Principal Investigator); Lamar, D. L.; Gazley, C., Jr.; Lamar, J. V.; Stratton, R. H.

1976-01-01

The author has identified the following significant results. Four previously unknown faults were discovered in basement terrane of the Peninsular Ranges. These have been named the San Ysidro Creek fault, Thing Valley fault, Canyon City fault, and Warren Canyon fault. In addition fault gouge and breccia were recognized along the San Diego River fault. Study of features on Skylab imagery and review of geologic and seismic data suggest that the risk of a damaging earthquake is greater along the northwestern portion of the Elsinore fault than along the southeastern portion. Physiographic indicators of active faulting along the Garlock fault identifiable in Skylab imagery include scarps, linear ridges, shutter ridges, faceted ridges, linear valleys, undrained depressions and offset drainage. The following previously unrecognized fault segments are postulated for the Salton Trough Area: (1) An extension of a previously known fault in the San Andreas fault set located southeast of the Salton Sea; (2) An extension of the active San Jacinto fault zone along a tonal change in cultivated fields across Mexicali Valley ( the tonal change may represent different soil conditions along opposite sides of a fault). For the Skylab and LANDSAT images studied, pseudocolor transformations offer no advantages over the original images in the recognition of faults in Skylab and LANDSAT images. Alluvial deposits of different ages, a marble unit and iron oxide gossans of the Mojave Mining District are more readily differentiated on images prepared from ratios of individual bands of the S-192 multispectral scanner data. The San Andreas fault was also made more distinct in the 8/2 and 9/2 band ratios by enhancement of vegetation differences on opposite sides of the fault. Preliminary analysis indicates a significant earth resources potential for the discrimination of soil and rock types, including mineral alteration zones. This application should be actively pursued.

Transport and distribution of trace elements and other selected inorganic constituents by suspended particulates in the Salton Sea Basin, California, 2001

USGS Publications Warehouse

LeBlanc, L.A.; Schroeder, R.A.

2008-01-01

In order to examine the transport of contaminants associated with river-derived suspended particles in the Salton Sea, California, large volume water samples were collected in transects established along the three major rivers emptying into the Salton Sea in fall 2001. Rivers in this area carry significant aqueous and particulate contaminant loads derived from irrigation water associated with the extensive agricultural activity, as well as wastewater from small and large municipalities. A variety of inorganic constituents, including trace metals, nutrients, and organic carbon were analyzed on suspended material isolated from water samples collected at upriver, near-shore, and off-shore sites established on the Alamo, New, and Whitewater rivers. Concentration patterns showed expected trends, with river-borne metals becoming diluted by organic-rich algal particles of lacustrine origin in off-shore stations. More soluble metals, such as cadmium, copper, and zinc showed a more even distribution between sites in the rivers and off-shore in the lake basin. General distributional trends of trace elements between particulate and aqueous forms were discerned by combining metal concentration data for particulates from this study with historical aqueous metals data. Highly insoluble trace metals, such as iron and aluminum, occurred almost entirely in the particulate phase, while major cations and approximately 95% of selenium were transported in the soluble phase. Evidence for greater reducing conditions in the New compared to the Alamo River was provided by the greater proportion of reduced (soluble) manganese in the New River. Evidence of bioconcentration of selenium and arsenic within the lake by algae was provided by calculating "enrichment" concentration ratios from metal concentrations on the algal-derived particulate samples and the off-shore sites. ?? 2008 Springer Science+Business Media B.V.

Program of scientific investigations and development of solid-oxide fuel cells (SOFC) in VNIITF. Proposals on scientific and technical collaboration and SOFC commercialization

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kleschev, Yu.N.; Chukharev, V.F.

1996-04-01

This paper describes proposals on scientific and technical collaborations pertaining to solid oxide fuel cell commercialization. Topics included for discussion are: materials research and manufacture; market estimation and cost; directions of collaboration; and project of proposals on joint enterprise creation.

Laser Technician Associate Degree Program. A Proposal Submitted to Wisconsin State Board of Vocational, Technical, and Adult Education. (Curriculum Development.) Final Report.

ERIC Educational Resources Information Center

North Central Technical Inst., Wausau, WI.

This final report contains the program proposal with supporting data for developing curriculum materials for and implementing an associate-degree laser technology program at the North Central Technical Institute. The proposal outline provides this information: (1) objectives for the program designed to prepare a technician to safely operate,…

Multicentre analysis of treatment planning information: technical requirements, possible applications and a proposal.

PubMed

Ebert, M A; Blight, J; Price, S; Haworth, A; Hamilton, C; Cornes, D; Joseph, D J

2004-09-01

Digital data from 3-D treatment planning computers is generally used for patient planning and then never considered again. However, such data contains enormous quantities of information regarding patient geometries, tissue outlining, treatment approaches and dose distributions. Were such data accessible from planning systems from multiple manufacturers, there would be substantial opportunities for undertaking quality assurance of radiotherapy clinical trials, prospective assessment of trial outcomes and basic treatment planning research and development. The technicalities of data exchange between planning systems are outlined, and previous attempts at producing systems capable of viewing and/or manipulating imaging and radiotherapy digital data reviewed. Development of a software system for enhancing the quality of Australasian clinical trials is proposed.

Feedbacks Among Rifting, Erosion, Lithospheric Rupture, and Crustal Recycling: From the Colorado River to the Salton Trough and Gulf of California (Invited)

NASA Astrophysics Data System (ADS)

Dorsey, R. J.; Lazear, G. D.

2013-12-01

Many studies examine the influence of climate and erosion on growth of convergent orogens, but feedbacks between tectonics and erosion in extensional and transtensional settings are less well understood. The Colorado River has delivered a huge volume of sediment to rapidly subsiding transtensional basins along the Pacific - North America plate boundary over the past ~5.5 million years. Oblique rifting, rupture, and rapid subsidence drive a newly recognized style of crustal recycling in which sediment is funneled out of the continental interior by a large river and delivered to subsiding basins where it is rapidly converted to a new generation of crust at a rifted continental margin. Transfer of crust can be tracked because the eroding source (Colorado Plateau) and depositional sinks (Salton Trough and northern Gulf of California) are intact and well preserved. Using distribution of late Miocene basalt flows and thermochronologic data, we calculate that 3.4 × 1.2 x 105 km3 of rock has been eroded from the Colorado Plateau since 10 Ma. Most of this erosion occurred starting 5.5-6.0 Ma when the river drainage became integrated and incision rates increased dramatically. Two estimates for the volume of Colorado River sediment stored in basinal sinks since ~5.5 Ma are: (1) 2.8 × 0.6 x 105 km3 assuming that crust between 5 and 10-12 km depth in the plate-boundary basins is young metasedimentary rock mixed with intrusions; or (2) 1.55 × 0.35 x 105 km3 assuming that crust below 4-5 km is thinned pre-Cenozoic crystalline rock. Significant overlap of estimate 1 with the volume eroded from the Plateau provides new support for a model of lithospheric rupture and crustal recycling in the Salton Trough and northern Gulf of California. Assuming an average density of 2.3-2.5 g/cc and the preferred volume estimate above, the total mass of crust transferred is roughly 5.1-11.5 x 1014 metric tons, representing an average annual flux of 156 × 60 Mt/yr since 5.3 Ma (when the

Irregular focal mechanisms observed at Salton Sea Geothermal Field: Possible influences of anthropogenic stress perturbations

USGS Publications Warehouse

Crandall-Bear, Aren; Barbour, Andrew J.; Schoenball, Martin; Schoenball, Martin

2018-01-01

At the Salton Sea Geothermal Field (SSGF), strain accumulation is released through seismic slip and aseismic deformation. Earthquake activity at the SSGF often occurs in swarm-like clusters, some with clear migration patterns. We have identified an earthquake sequence composed entirely of focal mechanisms representing an ambiguous style of faulting, where strikes are similar but deformation occurs due to steeply-dipping normal faults with varied stress states. In order to more accurately determine the style of faulting for these events, we revisit the original waveforms and refine estimates of P and S wave arrival times and displacement amplitudes. We calculate the acceptable focal plane solutions using P-wave polarities and S/P amplitude ratios, and determine the preferred fault plane. Without constraints on local variations in stress, found by inverting the full earthquake catalog, it is difficult to explain the occurrence of such events using standard fault-mechanics and friction. Comparing these variations with the expected poroelastic effects from local production and injection of geothermal fluids suggests that anthropogenic activity could affect the style of faulting.

Evaluating the Possibility of a joint San Andreas-Imperial Fault Rupture in the Salton Trough Region

NASA Astrophysics Data System (ADS)

Kyriakopoulos, C.; Oglesby, D. D.; Meltzner, A. J.; Rockwell, T. K.

2016-12-01

A geodynamic investigation of possible earthquakes in a given region requires both field data and numerical simulations. In particular, the investigation of past earthquakes is also a fundamental part of understanding the earthquake potential of the Salton Trough region. Geological records from paleoseismic trenches inform us of past ruptures (length, magnitude, timing), while dynamic rupture models allow us to evaluate numerically the mechanics of such earthquakes. The two most recent events (Mw 6.4 1940 and Mw 6.9 1979) on the Imperial fault (IF) both ruptured up to the northern end of the mapped fault, giving the impression that rupture doesn't propagate further north. This result is supported by small displacements, 20 cm, measured at the Dogwood site near the end of the mapped rupture in each event. However, 3D paleoseismic data from the same site corresponding to the most recent pre-1940 event (1710 CE) and 5th (1635 CE) and 6th events back revealed up to 1.5 m of slip in those events. Since we expect the surface displacement to decrease toward the termination of a rupture, we postulate that in these earlier cases the rupture propagated further north than in 1940 or 1979. Furthermore, paleoseismic data from the Coachella site (Philibosian et al., 2011) on the San Andreas fault (SAF) indicates slip events ca. 1710 CE and 1588-1662 CE. In other words, the timing of two large paleoseismic displacements on the IF cannot be distinguished from the timing of the two most recent events on the southern SAF, leaving a question: is it possible to have through-going rupture in the Salton Trough? We investigate this question through 3D dynamic finite element rupture modeling. In our work, we considered two scenarios: rupture initiated on the IF propagating northward, and rupture initiated on the SAF propagating southward. Initial results show that, in the first case, rupture propagates north of the mapped northern terminus of the IF only under certain pre

48 CFR 3419.870 - Acquisition of technical requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... competition to submit written technical proposals. Otherwise, ED holds oral discussions with the participating... participating in a limited technical competition based on the written technical proposals or oral discussions... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Acquisition of technical...

TurboTech Technical Evaluation Automated System

NASA Technical Reports Server (NTRS)

Tiffany, Dorothy J.

2009-01-01

TurboTech software is a Web-based process that simplifies and semiautomates technical evaluation of NASA proposals for Contracting Officer's Technical Representatives (COTRs). At the time of this reporting, there have been no set standards or systems for training new COTRs in technical evaluations. This new process provides boilerplate text in response to interview style questions. This text is collected into a Microsoft Word document that can then be further edited to conform to specific cases. By providing technical language and a structured format, TurboTech allows the COTRs to concentrate more on the actual evaluation, and less on deciding what language would be most appropriate. Since the actual word choice is one of the more time-consuming parts of a COTRs job, this process should allow for an increase in quantity of proposals evaluated. TurboTech is applicable to composing technical evaluations of contractor proposals, task and delivery orders, change order modifications, requests for proposals, new work modifications, task assignments, as well as any changes to existing contracts.

Total selenium and selenium species in irrigation drain inflows to the Salton Sea, California, April and July 2007

USGS Publications Warehouse

May, Thomas W.; Walther, Michael J.; Saiki, Michael K.; Brumbaugh, William G.

2007-01-01

This report presents the results for two sampling periods during a 4-year monitoring survey to provide a characterization of selenium concentrations in selected irrigation drains flowing into the Salton Sea, California. Total selenium, selenium species, and total suspended solids were determined in water samples, and total selenium was determined in sediment, detritus, and biota that included algae, plankton, midge larvae (family, Chironomidae), and two fish species-western mosquitofish (Gambusia affinis), and sailfin molly (Poecilia latipinna). In addition, sediments were analyzed for percent total organic carbon and particle size. Total selenium concentrations in water for both sampling periods ranged from 1.43 to 47.1 micrograms per liter, predominately as selenate, which is typical of waters leached out of selenium-contaminated marine shales under alkaline and oxidizing conditions. Total selenium concentrations ranged from 0.88 to 20.2 micrograms per gram in biota, and from 0.15 to 28.9 micrograms per gram in detritus and sediment.

75 FR 75453 - Proposed Information Collection; Comment Request; Technical Data Letter of Explanation

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-03

... Request; Technical Data Letter of Explanation AGENCY: Bureau of Industry and Security. ACTION: Notice....gov . SUPPLEMENTARY INFORMATION: I. Abstract These technical data letters of explanation will assure the Bureau of Industry and Security that U.S.-origin technical data will be exported only for...

48 CFR 315.307 - Proposal revisions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... appropriate; and (2) An evaluation of technical factors by the technical evaluation panel, as necessary. The technical evaluation panel may rescore and re-rank technical proposals in the competitive range and prepare a technical evaluation report. To the extent practicable, the same evaluators who reviewed the...

75 FR 13209 - Proposed Information Collection (Technical Industry Standards) Activity: Comment Request

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-18

... (Technical Industry Standards) Activity: Comment Request AGENCY: Office of Acquisition and Logistics... Industry Standards. OMB Control Number: 2900-0586. Type of Review: Extension of a currently approved collection. Abstract: VAAR provision 852.211-75, Technical Industry Standards, requires items offered for...

76 FR 9607 - Notice of Proposed Information Collection for Technical Evaluation Surveys

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-18

... Information Collection for Technical Evaluation Surveys AGENCY: Office of Surface Mining Reclamation and... information collection request for its Technical Evaluation customer surveys has been forwarded to the Office of Management and Budget (OMB) for review and comment. The information collection request describes...

Preliminary Assessment of the Proposed Closure of the National Technical Information Service (NTIS): A Report to the President and the Congress.

ERIC Educational Resources Information Center

Horton, Forest Woody, Ed.; Kadec, Sarah T., Ed.

This document reports on an NCLIS (National Commission on Libraries and Information Science) study of the proposal to close NTIS (National Technical Information Service) and shift its paper, microfiche, digital archives, and bibliographic database to the Library of Congress. The report documents the results of research, interviews, public…

3-D Velocity Model of the Coachella Valley, Southern California Based on Explosive Shots from the Salton Seismic Imaging Project

NASA Astrophysics Data System (ADS)

Persaud, P.; Stock, J. M.; Fuis, G. S.; Hole, J. A.; Goldman, M.; Scheirer, D. S.

2014-12-01

We have analyzed explosive shot data from the 2011 Salton Seismic Imaging Project (SSIP) across a 2-D seismic array and 5 profiles in the Coachella Valley to produce a 3-D P-wave velocity model that will be used in calculations of strong ground shaking. Accurate maps of seismicity and active faults rely both on detailed geological field mapping and a suitable velocity model to accurately locate earthquakes. Adjoint tomography of an older version of the SCEC 3-D velocity model shows that crustal heterogeneities strongly influence seismic wave propagation from moderate earthquakes (Tape et al., 2010). These authors improve the crustal model and subsequently simulate the details of ground motion at periods of 2 s and longer for hundreds of ray paths. Even with improvements such as the above, the current SCEC velocity model for the Salton Trough does not provide a match of the timing or waveforms of the horizontal S-wave motions, which Wei et al. (2013) interpret as caused by inaccuracies in the shallow velocity structure. They effectively demonstrate that the inclusion of shallow basin structure improves the fit in both travel times and waveforms. Our velocity model benefits from the inclusion of known location and times of a subset of 126 shots detonated over a 3-week period during the SSIP. This results in an improved velocity model particularly in the shallow crust. In addition, one of the main challenges in developing 3-D velocity models is an uneven stations-source distribution. To better overcome this challenge, we also include the first arrival times of the SSIP shots at the more widely spaced Southern California Seismic Network (SCSN) in our inversion, since the layout of the SSIP is complementary to the SCSN. References: Tape, C., et al., 2010, Seismic tomography of the Southern California crust based on spectral-element and adjoint methods: Geophysical Journal International, v. 180, no. 1, p. 433-462. Wei, S., et al., 2013, Complementary slip distributions

Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapia (Oreochromis mossambicus) in the Salton Sea.

PubMed

Nol, P; Rocke, T E; Gross, K; Yuill, T M

2004-07-01

Tilapia (Oreochromis mossambicus) have been implicated as the source of type C toxin in avian botulism outbreaks in pelicans (Pelecanus erythrorhynchos, Pelecanus occidentalis californicus) at the Salton Sea in southern California (USA). We collected sick, dead, and healthy fish from various sites throughout the Sea during the summers of 1999 through 2001 and tested them for the presence of Clostridium botulinum type C cells by polymerase chain reaction targeting the C(1) neurotoxin gene. Four of 96 (4%), 57 of 664 (9%), and five of 355 (1%) tilapia tested were positive for C. botulinum type C toxin gene in 1999, 2000, and 2001, respectively. The total number of positive fish was significantly greater in 2000 than in 2001 (P<0.0001). No difference in numbers of positives was detected between sick and dead fish compared with live fish. In 2000, no significant relationships were revealed among the variables studied, such as location and date of collection.

Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapis (Oreochromis mossambicus) in the Salton Sea

USGS Publications Warehouse

Nol, P.J.; Rocke, T.E.; Gross, K.; Yuill, Thomas M.

2004-01-01

Tilapia (Oreochromis mossambicus) have been implicated as the source of type C toxin in avian botulism outbreaks in pelicans (Pelecanus erythrorhynchos, Pelecanus occidentalis californicus) at the Salton Sea in southern California (USA). We collected sick, dead, and healthy fish from various sites throughout the Sea during the summers of 1999 through 2001 and tested them for the presence of Clostridium botulinum type C cells by polymerase chain reaction targeting the C1 neurotoxin gene. Four of 96 (4%), 57 of 664 (9%), and five of 355 (1%) tilapia tested were positive for C. botulinum type C toxin gene in 1999, 2000, and 2001, respectively. The total number of positive fish was significantly greater in 2000 than in 2001 (P<0.0001). No difference in numbers of positives was detected between sick and dead fish compared with live fish. In 2000, no significant relationships were revealed among the variables studied, such as location and date of collection.

Towards technical interoperability in telemedicine.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Craft, Richard Layne, II

2004-05-01

For telemedicine to realize the vision of anywhere, anytime access to care, the question of how to create a fully interoperable technical infrastructure must be addressed. After briefly discussing how 'technical interoperability' compares with other types of interoperability being addressed in the telemedicine community today, this paper describes reasons for pursuing technical interoperability, presents a proposed framework for realizing technical interoperability, identifies key issues that will need to be addressed if technical interoperability is to be achieved, and suggests a course of action that the telemedicine community might follow to accomplish this goal.

An Evaluation of Subsurface Plumbing of a Hydrothermal Seep Field and Possible Influence from Local Seismicity from New Time-Series Data Collected at the Davis-Schrimpf Seep Field, Salton Trough, California

NASA Astrophysics Data System (ADS)

Rao, A.; Onderdonk, N.

2016-12-01

The Davis­-Schrimpf Seep Field (DSSF) is a group of approximately 50 geothermal mud seeps (gryphons) in the Salton Trough of southeastern California. Its location puts it in line with the mapped San Andreas Fault, if extended further south, as well as within the poorly-understood Brawley Seismic Zone. Much of the geomorphology, geochemistry, and other characteristics of the DSSF have been analyzed, but its subsurface structure remains unknown. Here we present data and interpretations from five new temperature time­series from four separate gryphons at the DSSF, and compare them both amongst themselves, and within the context of all previously collected data to identify possible patterns constraining the subsurface dynamics. Simultaneously collected time-series from different seeps were cross-correlated to quantify similarity. All years' time-series were checked against the record of local seismicity to identify any seismic influence on temperature excursions. Time-series captured from the same feature in different years were statistically summarized and the results plotted to examine their evolution over time. We found that adjacent vents often alternate in temperature, suggesting a switching of flow path of the erupted mud at the scale of a few meters or less. Noticeable warming over time was observed in most of the features with time-series covering multiple years. No synchronicity was observed between DSSF features' temperature excursions, and seismic events within a 24 kilometer radius covering most of the width of the surrounding Salton Trough.

48 CFR 2052.215-75 - Proposal presentation and format.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., i.e., competitive vs. noncompetitive, and the cost evaluation. (c) “Written Technical and Management... * copies. (1) The written Technical and Management Proposal or Oral Presentation and Supporting... objectives of this procurement. (3) The written Technical Proposal or Oral Presentation and Supporting...

12 CFR 1805.303 - Technical assistance.

Code of Federal Regulations, 2010 CFR

2010-01-01

... proposes to become a CDFI. Such technical assistance may include training for management and other... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Technical assistance. 1805.303 Section 1805.303... COMMUNITY DEVELOPMENT FINANCIAL INSTITUTIONS PROGRAM Use of Funds/Eligible Activities § 1805.303 Technical...

Temporal Variability in Seismic Velocity at the Salton Sea Geothermal Field

NASA Astrophysics Data System (ADS)

Taira, T.; Nayak, A.; Brenguier, F.

2015-12-01

We characterize the temporal variability of ambient noise wavefield and search for velocity changes associated with activities of the geothermal energy development at the Salton Sea Geothermal Field. The noise cross-correlations (NCFs) are computed for ~6 years of continuous three-component seismic data (December 2007 through January 2014) collected at 8 sites from the CalEnergy Subnetwork (EN network) with MSNoise software (Lecocq et al., 2014, SRL). All seismic data are downloaded from the Southern California Earthquake Data Center. Velocity changes (dv/v) are obtained by measuring time delay between 5-day stacks of NCFs and the reference NCF (average over the entire 6 year period). The time history of dv/v is determined by averaging dv/v measurements over all station/channel pairs (252 combinations). Our preliminary dv/v measurement suggests a gradual increase in dv/v over the 6-year period in a frequency range of 0.5-8.0 Hz. The resultant increase rate of velocity is about 0.01%/year. We also explore the frequency-dependent velocity change at the 5 different frequency bands (0.5-2.0 Hz, 0.75-3.0 Hz, 1.0-4.0 Hz, 1.5-6.0 Hz, and 2.0-8.0 Hz) and find that the level of this long-term dv/v variability is increased with increase of frequency (i.e., the highest increase rate of ~0.15%/year at the 0.5-2.0 Hz band). This result suggests that the velocity changes were mostly occurred in a depth of ~500 m assuming that the coda parts of NCFs (~10-40 s depending on station distances) are predominantly composed of scattered surface waves, with the SoCal velocity model (Dreger and Helmberger, 1993, JGR). No clear seasonal variation of dv/v is observed in the frequency band of 0.5-8.0 Hz.

Water quality in the New River from Calexico to the Salton Sea, Imperial County, California

USGS Publications Warehouse

Setmire, James G.

1984-01-01

The New River enters the United States at Calexico, Calif., after it crosses the international boundary. Water-quality data from routine collection indicated that the New River was degraded by high organic and bacterial content. Intensive sampling for chemical and physical constituents and properties of the river was done May 9-13, 1977, to quantify the chemical composition of the water and to identify water-quality problems. Concentrations of total organic carbon in the New River at Calexico ranged from 80 to 161 milligrams per liter and dissolved organic carbon ranged from 34 to 42 milligrams per liter; the maximum chemical oxygen demand was 510 milligrams per liter. Intensive sampling for chemical and biological characteristics was done in the New River from May 1977 to June 1978 to determine the occurrence of the organic material and its effects on downstream water quality. Dissolved-oxygen concentration was measured along longitudinal profiles of the river from Calexico to the Salton Sea. A dissolved-oxygen sag downstream from the Calexico gage varied seasonally. The sag extended farther downstream and had lower concentrations of dissolved oxygen during the summer months than during the winter months. The sag of zero dissolved-oxygen concentration extended 26 miles in July 1977. In December 1976, the sag extended 20 miles but the minimum dissolved-oxygen concentration was 2.5 milligrams per liter. The greatest diel (24-hour) variation in dissolved-oxygen concentration occurred in the reach from the Calexico gage to Lyons Crossing, 8.8 miles downstream. High concentrations of organic material were detected as far as Highway 80, 19.5 miles downstream from the international boundary. Biological samples analyzed for benthic invertebrates showed that water at the Calexico and Lyons Crossing sites, nearest the international boundary, was of such poor quality that very few bottom-dwelling organisms could survive. Although the water was of poor quality at Keystone

48 CFR 815.404-1 - Proposal analysis techniques.

Code of Federal Regulations, 2010 CFR

2010-10-01

... technical reviews. (See 801.602-70.) (b) Contracting officers determine the level of technical analyses... under them, and contract modifications. Contracting officers must request technical analyses of the proposals from the appropriate technical personnel. The technical analyses must address, as a minimum, the...

48 CFR 815.404-1 - Proposal analysis techniques.

Code of Federal Regulations, 2011 CFR

2011-10-01

... technical reviews. (See 801.602-70.) (b) Contracting officers determine the level of technical analyses... under them, and contract modifications. Contracting officers must request technical analyses of the proposals from the appropriate technical personnel. The technical analyses must address, as a minimum, the...

75 FR 29732 - Career and Technical Education Program-Promoting Rigorous Career and Technical Education Programs...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-27

... DEPARTMENT OF EDUCATION Career and Technical Education Program--Promoting Rigorous Career and Technical Education Programs of Study Catalog of Federal Domestic Assistance (CFDA) Number: 84.051C. AGENCY: Office of Vocational and Adult Education, Department of Education. ACTION: Notice of proposed priorities...

Suborbital Safety Technical Committee- Summary of Proposed Standards & Guidelines

NASA Astrophysics Data System (ADS)

Quinn, Andy; Atencia Yepez, Amaya; Klicker, Michael; Howard, Diane; Verstraeten, Joram; Other Suborbital Safety TC Members

2013-09-01

There are currently no international safety standards and guidelines to assist designers, operators and authorities in the suborbital domain. There is a launch licensing regime in the United States (US) to assist the forerunners of the suborbital domain however this does not provide a safety approval for the vehicle against set standards or does not have an acceptable level of safety to achieve in terms of design or operation. In Europe a certification framework may be implemented however this (or any regulatory framework) is not in place as yet. This paper summarises the 5 tasks thus far completed by the International Association for the Advancement of Space Safety (IAASS) Suborbital Safety Technical Committee (SS TC) in terms of deriving standards and guidelines for the suborbital domain. The SS TC comprises members from the suborbital industry (US and European vehicle designers), safety experts, legal experts, medical/training experts, prospective spaceport operators and members from the US and European authorities (though these members cannot directly steer the standards and guidelines - they can merely review them for interest and comment on non-policy aspects). The SS TC has been divided into three working groups (WG): Regulatory WG, Technical WG and Operations WG. The 5 tasks that are summarised in this paper include: Regulatory WG - (Task 1) Clarify and promote regulatory framework for suborbital flights (including discussions on Space Law 'v' Air Law for suborbital domain); Technical WG - (Task 1) Defining & Alignment (globally) of Safety Criteria for Suborbital domain using industry best practices, (Task 2) Software/complex hardware certification for suborbital flights; Operations WG - (Task 1) Flight Crew and Spaceflight Participant Medical and Training Standards & Guidelines for suborbital flight, (Task 2) Spaceport Safety Management System. This paper also details the next set of standards and guidelines that will be derived by the SS TC. The paper

Character and Implications of a Newly Identified Creeping Strand of the San Andreas fault NE of Salton Sea, Southern California

NASA Astrophysics Data System (ADS)

Janecke, S. U.; Markowski, D.

2015-12-01

The overdue earthquake on the Coachella section, San Andreas fault (SAF), the model ShakeOut earthquake, and the conflict between cross-fault models involving the Extra fault array and mapped shortening in the Durmid Hill area motivate new analyses at the southern SAF tip. Geologic mapping, LiDAR, seismic reflection, magnetic and gravity datasets, and aerial photography confirm the existence of the East Shoreline strand (ESS) of the SAF southwest of the main trace of the SAF. We mapped the 15 km long ESS, in a band northeast side of the Salton Sea. Other data suggest that the ESS continues N to the latitude of the Mecca Hills, and is >35 km long. The ESS cuts and folds upper Holocene beds and appears to creep, based on discovery of large NW-striking cracks in modern beach deposits. The two traces of the SAF are parallel and ~0.5 to ~2.5 km apart. Groups of east, SE, and ENE-striking strike-slip cross-faults connect the master dextral faults of the SAF. There are few sinistral-normal faults that could be part of the Extra fault array. The 1-km wide ESS contains short, discontinuous traces of NW-striking dextral-oblique faults. These en-echelon faults bound steeply dipping Pleistocene beds, cut out section, parallel tight NW-trending folds, and produced growth folds. Beds commonly dip toward the ESS on both sides, in accord with persistent NE-SW shortening across the ESS. The dispersed fault-fold structural style of the ESS is due to decollements in faulted mud-rich Pliocene to Holocene sediment and ramps and flats along the strike-slip faults. A sheared ladder-like geometric model of the two master dextral strands of the SAF and their intervening cross-faults, best explains the field relationships and geophysical datasets. Contraction across >40 km2 of the southernmost SAF zone in the Durmid Hills suggest that interaction of active structures in the SAF zone may inhibit the nucleation of large earthquakes in this region. The ESS may cross the northern Coachella

47 CFR 68.608 - Publication of technical criteria.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Attachments § 68.608 Publication of technical criteria. The Administrative Council for Terminal Attachments shall place technical criteria proposed for publication on public notice for 30 days. At the end of the... Attachments shall publish the technical criteria. ...

47 CFR 68.608 - Publication of technical criteria.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Attachments § 68.608 Publication of technical criteria. The Administrative Council for Terminal Attachments shall place technical criteria proposed for publication on public notice for 30 days. At the end of the... Attachments shall publish the technical criteria. ...

Preparing Research and Development Proposals for Vocational-Technical Education. Research Series No. 40.

ERIC Educational Resources Information Center

Lamberth, Edwin E.

The purpose of this handbook is to present in a simple form the processes and procedures involved in preparing research and development projects in vocational-technical education in the State of Tennessee. It was prepared in conjunction with the Research Coordinating Unit (RCU) and the division of Vocational-Technical Education, State Department…

Composite Socio-Technical Systems: A Method for Social Energy Systems

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zhang, Yingchen; He, Fulin; Hao, Jun

In order to model and study the interactions between social on technical systems, a systemic method, namely the composite socio-technical systems (CSTS), is proposed to incorporate social systems, technical systems and the interaction mechanism between them. A case study on University of Denver (DU) campus grid is presented in paper to demonstrate the application of the proposed method. In the case study, the social system, technical system, and the interaction mechanism are defined and modelled within the framework of CSTS. Distributed and centralized control and management schemes are investigated, respectively, and numerical results verifies the feasibility and performance of themore » proposed composite system method.« less

Total selenium and selenium species in irrigation drain inflows to the Salton Sea, California, April and July 2008

USGS Publications Warehouse

May, Thomas W.; Walther, Michael J.; Saiki, Michael K.; Brumbaugh, William G.

2009-01-01

This report presents the results for two sampling periods (April 2008 and July 2008) during a 4-year monitoring program to characterize selenium concentrations in selected irrigation drains flowing into the Salton Sea, California. Total selenium, selenium species (dissolved selenite, selenate, organoselenium), and total suspended solids were determined in water samples and total selenium was determined in water column particulates and in sediment, detritus, and biota that included algae, plankton, midge larvae (family, Chironomidae), and two fish species - western mosquitofish (Gambusia affinis) and sailfin molly (Poecilia latipinna). In addition, sediments were analyzed for percent total organic carbon and particle size. Mean total selenium concentrations in water for both sampling periods ranged from 1.93 to 44.2 micrograms per liter, predominately as selenate, which is typical of waters where selenium is leached out of selenium-containing marine shales and associated soils under alkaline and oxidizing conditions. Total selenium concentrations (micrograms per gram dry weight) ranged as follows: algae, 0.75 to 3.39; plankton, 0.88 to 4.03; midges, 2.52 to 44.3; fish, 3.37 to 18.9; detritus, 1.11 to 13.6; sediment, 0.11 to 8.93.

The Effects of Rapid Sedimentation upon Continental Breakup: Kinematic and Thermal Modeling of the Salton Trough, Southern California, Based upon Recent Seismic Images

NASA Astrophysics Data System (ADS)

Han, L.; Hole, J. A.; Lowell, R. P.; Stock, J. M.; Fuis, G. S.

2016-12-01

The Salton Seismic Imaging Project (SSIP) illuminated crustal and upper mantle structure of the Salton Trough, the northern-most rift segment of the Gulf of California plate boundary. The crust is 17-18 km thick and homogeneous for 100 km in the plate motion direction. New crust is being created by distributed rift magmatism, Colorado River sedimentation, and metamorphism of the sediment. A 5 km thick pre-existing crustal layer may still exist. The crust has not broken apart to enable initiation of seafloor spreading. A one-dimensional time-dependent kinematic and thermal model was developed to simulate these observations. We assume that all crustal layers are stretched uniformly during extension. Distributed mafic magmatism and sedimentation are added simultaneously to compensate for the crustal thinning. The ratio of magmatism to sedimentation is constrained by the seismic observations. Heat is transported by thermal conduction and by advection due to stretching of the crust. A constant temperature boundary at the Moho is used to represent partial melting in the upper mantle. Assuming a constant plate motion rate, the zone of active rifting extends linearly with time. The crustal thickness and internal structure also evolve with time. The model constraints are the observed seismic structure and heat flow. The model rapidly reaches quasi-steady state, and could continue for many millions of years. The observed seismic structure and heat flow are reproduced after 3 Myr. The yield strength profile calculated from lithology and model temperature indicates that ductile deformation in the middle and lower crust dominates the crustal rheology. Rapid sedimentation delays crustal breakup and the initiation of seafloor spreading by maintaining the thickness of the crust and keeping it predominantly ductile. This process probably occurs wherever a large river flows into an active rift driven by far-field extension. It may have built passive margins in many locations

Monitoring reservoir response to earthquakes and fluid extraction, Salton Sea geothermal field, California

PubMed Central

Taira, Taka’aki; Nayak, Avinash; Brenguier, Florent; Manga, Michael

2018-01-01

Continuous monitoring of in situ reservoir responses to stress transients provides insights into the evolution of geothermal reservoirs. By exploiting the stress dependence of seismic velocity changes, we investigate the temporal evolution of the reservoir stress state of the Salton Sea geothermal field (SSGF), California. We find that the SSGF experienced a number of sudden velocity reductions (~0.035 to 0.25%) that are most likely caused by openings of fractures due to dynamic stress transients (as small as 0.08 MPa and up to 0.45 MPa) from local and regional earthquakes. Depths of velocity changes are estimated to be about 0.5 to 1.5 km, similar to the depths of the injection and production wells. We derive an empirical in situ stress sensitivity of seismic velocity changes by relating velocity changes to dynamic stresses. We also observe systematic velocity reductions (0.04 to 0.05%) during earthquake swarms in mid-November 2009 and late-December 2010. On the basis of volumetric static and dynamic stress changes, the expected velocity reductions from the largest earthquakes with magnitude ranging from 3 to 4 in these swarms are less than 0.02%, which suggests that these earthquakes are likely not responsible for the velocity changes observed during the swarms. Instead, we argue that velocity reductions may have been induced by poroelastic opening of fractures due to aseismic deformation. We also observe a long-term velocity increase (~0.04%/year) that is most likely due to poroelastic contraction caused by the geothermal production. Our observations demonstrate that seismic interferometry provides insights into in situ reservoir response to stress changes. PMID:29326977

Monitoring reservoir response to earthquakes and fluid extraction, Salton Sea geothermal field, California.

PubMed

Taira, Taka'aki; Nayak, Avinash; Brenguier, Florent; Manga, Michael

2018-01-01

Continuous monitoring of in situ reservoir responses to stress transients provides insights into the evolution of geothermal reservoirs. By exploiting the stress dependence of seismic velocity changes, we investigate the temporal evolution of the reservoir stress state of the Salton Sea geothermal field (SSGF), California. We find that the SSGF experienced a number of sudden velocity reductions (~0.035 to 0.25%) that are most likely caused by openings of fractures due to dynamic stress transients (as small as 0.08 MPa and up to 0.45 MPa) from local and regional earthquakes. Depths of velocity changes are estimated to be about 0.5 to 1.5 km, similar to the depths of the injection and production wells. We derive an empirical in situ stress sensitivity of seismic velocity changes by relating velocity changes to dynamic stresses. We also observe systematic velocity reductions (0.04 to 0.05%) during earthquake swarms in mid-November 2009 and late-December 2010. On the basis of volumetric static and dynamic stress changes, the expected velocity reductions from the largest earthquakes with magnitude ranging from 3 to 4 in these swarms are less than 0.02%, which suggests that these earthquakes are likely not responsible for the velocity changes observed during the swarms. Instead, we argue that velocity reductions may have been induced by poroelastic opening of fractures due to aseismic deformation. We also observe a long-term velocity increase (~0.04%/year) that is most likely due to poroelastic contraction caused by the geothermal production. Our observations demonstrate that seismic interferometry provides insights into in situ reservoir response to stress changes.

78 FR 65695 - 30-Day Notice of Proposed Information Collection: Technical Processing Requirements for...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-01

... Information Collection: Technical Processing Requirements for Multifamily Project Mortgage Insurance AGENCY: Office of the Chief Information Officer, HUD. ACTION: Correction, notice. SUMMARY: On October 25, 2013 at... Collection Title of Information Collection: Technical Processing Requirements for Multifamily Project...

13 CFR 146.205 - Professional and technical services.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Professional and technical... RESTRICTIONS ON LOBBYING Activities by Own Employees § 146.205 Professional and technical services. (a) The... technical services rendered directly in the preparation, submission, or negotiation of any bid, proposal, or...

Advances in Mineral Dust Source Composition Measurement with Imaging Spectroscopy at the Salton Sea, CA

NASA Astrophysics Data System (ADS)

Green, R. O.; Realmuto, V. J.; Thompson, D. R.; Mahowald, N. M.; Pérez García-Pando, C.; Miller, R. L.; Clark, R. N.; Swayze, G. A.; Okin, G. S.

2015-12-01

Mineral dust emitted from the Earth's surface is a principal contributor to direct radiative forcing over the arid regions, where shifts in climate have a significant impact on agriculture, precipitation, and desert encroachment around the globe. Dust particles contribute to both positive and negative forcing, depending on the composition of the particles. Particle composition is a function of the surface mineralogy of dust source regions, but poor knowledge of surface mineralogy on regional to global scales limits the skill of Earth System models to predict shifts in regional climate around the globe. Earth System models include the source, emission, transport and deposition phases of the dust cycle. In addition to direct radiative forcing contributions, mineral dust impacts include indirect radiative forcing, modification of the albedo and melting rates of snow and ice, kinetics of tropospheric photochemistry, formation and deposition of acidic aerosols, supply of nutrients to aquatic and terrestrial ecosystems, and impact on human health and safety. We demonstrate the ability to map mineral dust source composition in the Salton Sea dust source region with imaging spectroscopy measurements acquired as part of the NASA HyspIRI preparatory airborne campaign. These new spectroscopically derived compositional measurements provide a six orders of magnitude improvement over current atlases for this dust source region and provide a pathfinder example for a remote measurement approach to address this critical dust composition gap for global Earth System models.

47 CFR 68.608 - Publication of technical criteria.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 47 Telecommunication 3 2012-10-01 2012-10-01 false Publication of technical criteria. 68.608... Attachments § 68.608 Publication of technical criteria. The Administrative Council for Terminal Attachments shall place technical criteria proposed for publication on public notice for 30 days. At the end of the...

47 CFR 68.608 - Publication of technical criteria.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 3 2014-10-01 2014-10-01 false Publication of technical criteria. 68.608... Attachments § 68.608 Publication of technical criteria. The Administrative Council for Terminal Attachments shall place technical criteria proposed for publication on public notice for 30 days. At the end of the...

Total selenium and selenium species in irrigation drain inflows to the Salton Sea, California, October 2007 and January 2008

USGS Publications Warehouse

May, Thomas W.; Walther, Michael J.; Saiki, Michael K.; Brumbaugh, William G.

2008-01-01

This report presents the results for two sampling periods (October 2007 and January 2008) during a 4-year monitoring program to characterize selenium concentrations in selected irrigation drains flowing into the Salton Sea, California. Total selenium, selenium species (selenite, selenate, organoselenium), and total suspended solids were determined in water samples, and total selenium was determined in sediment, detritus, and biota that included algae, plankton, midge larvae (family, Chironomidae), and two fish species?western mosquitofish (Gambusia affinis) and sailfin molly (Poecilia latipinna). In addition, sediments were analyzed for percent total organic carbon and particle size. Mean total selenium concentrations in water for both sampling periods ranged from 0.97 to 64.5 micrograms per liter, predominately as selenate, which is typical of waters where selenium is leached out of selenium-containing marine shales and associated soils under alkaline and oxidizing conditions. Total selenium concentrations (micrograms per gram dry weight) ranged as follows: algae, 0.95 to 5.99; plankton, 0.15 to 19.3; midges, 1.39 to 15.4; fish, 3.71 to 25.1; detritus, 0.85 to 21.7; sediment, 0.32 to 7.28.

Total selenium and selenium species in irrigation drain inflows to the Salton Sea, California, October 2008 and January 2009

USGS Publications Warehouse

May, Thomas W.; Walther, Michael J.; Saiki, Michael K.; Brumbaugh, William G.

2009-01-01

This report presents the results for two sampling periods (October 2008 and January 2009) during a 4-year monitoring program to characterize selenium concentrations in selected irrigation drains flowing into the Salton Sea, California. Total selenium, selenium species (dissolved selenite, selenate, organoselenium), and total suspended solids were determined in water samples. Total selenium also was determined in water column particulates and in sediment, detritus, and biota that included algae, plankton, midge larvae (family, Chironomidae), and two fish species (western mosquitofish, Gambusia affinis, and sailfin molly, Poecilia latipinna). In addition, sediments were analyzed for percent total organic carbon and particle size. Mean total selenium concentrations in water for both sampling periods ranged from 1.00 to 33.6 micrograms per liter, predominately as selenate, which is typical of waters where selenium is leached out of selenium-containing marine shales and associated soils under alkaline and oxidizing conditions. Total selenium concentrations (micrograms per gram dry weight) ranged as follows: algae, 1.52 to 8.26; plankton, 0.79 to 3.66; midges, 2.68 to 50.6; fish, 3.09 to 30.4; detritus, 1.78 to 58.0; and sediment, 0.42 to 10.0.

7 CFR 652.33 - Notice of proposed decertification.

Code of Federal Regulations, 2010 CFR

2010-01-01

..., return receipt requested, to the technical service provider proposed for decertification a written Notice... CONSERVATION SERVICE, DEPARTMENT OF AGRICULTURE SUPPORT ACTIVITIES TECHNICAL SERVICE PROVIDER ASSISTANCE...

Proposal Tools for ASTRO-E

NASA Astrophysics Data System (ADS)

Mukai, K.; ASTRO-E Guest Observer Facility Team

1998-12-01

The XRS instrument on board ASTRO-E is expected to last about two years, before it runs out of cryogen. This leads us to place a particular emphasis on the technical aspects of the observing proposals to maximize the scientific return, more so than for missions/instruments with longer life times. In this talk, we will introduce the tools that we provide for you to write technically sound ASTRO-E XRS proposals. They include PIMMS/W3pimms and xspec/WebSpec for exposure time calculation, simaste for more detailed simulations (particularly of extended sources), and Wasabi, the Web-based observation visualization tool.

76 FR 69296 - Proposed Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler TSTF...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-08

... Adoption of Technical Specifications Task Force Traveler TSTF-500, Revision 2, ``DC Electrical Rewrite... Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2, ``DC Electrical Rewrite--Update to... Reactor Systems Engineer, Technical Specifications Branch, Mail Stop: O-7 C2A, Division of Inspection and...

Espey, Huston & Associates Technical Library. A Proposal.

ERIC Educational Resources Information Center

Fortine, Suellen

This proposal for the establishment of a library or information center for an environmental and engineering consulting firm in Texas is divided into two phases--current problems, and future expansion of library service. Major considerations include informational problems of the existing small library facility, i.e., locational and subject access,…

Technical Assistance to Brownfields Communities

EPA Pesticide Factsheets

This notice announces the availability of funds and solicits proposals from eligible entities (including eligible non-profit organizations) to provide technical assistance to communities on brownfields issues.

Double-diffusive convection in geothermal systems: the salton sea, California, geothermal system as a likely candidate

USGS Publications Warehouse

Fournier, R.O.

1990-01-01

Much has been published about double-diffusive convection as a mechanism for explaining variations in composition and temperature within all-liquid natural systems. However, relatively little is known about the applicability of this phenomenon within the heterogeneous rocks of currently active geothermal systems where primary porosity may control fluid flow in some places and fractures may control it in others. The main appeal of double-diffusive convection within hydrothermal systems is-that it is a mechanism that may allow efficient transfer of heat mainly by convection, while at the same time maintaining vertical and lateral salinity gradients. The Salton Sea geothermal system exhibits the following reservoir characteristics: (1) decreasing salinity and temperature from bottom to top and center toward the sides, (2) a very high heat flow from the top of the system that seems to require a major component of convective transfer of heat within the chemically stratified main reservoir, and (3) a relatively uniform density of the reservoir fluid throughout the system at all combinations of subsurface temperature, pressure, and salinity. Double-diffusive convection can account for these characteristics very nicely whereas other previously suggested models appear to account either for the thermal structure or for the salinity variations, but not both. Hydrologists, reservoir engineers, and particularly geochemists should consider the possibility and consequences of double-diffusive convection when formulating models of hydrothermal processes, and of the response of reservoirs to testing and production. ?? 1990.

Atmospheric dry deposition in the vicinity of the Salton Sea, California - II: Measurement and effects of an enhanced evaporation system

USGS Publications Warehouse

Alonso, R.; Bytnerowicz, A.; Yee, J.L.; Boarman, W.I.

2005-01-01

A study was conducted to determine the effects of salt spray drift from pilot technologies employed by the US Bureau of Reclamation on deposition rates of various air-born ions. An enhanced evaporation system (EES) was tested in the field at the Salton Sea, California. Dry deposition of NO3-, NH4+, SO42-, Cl-, Ca2+, Na+, K+ and Se was assessed by using nylon filters and branches of natural vegetation exposed for one-week long periods. The simultaneous exposure of both lyophilized branches and branches of live plants offered important information highlighting the dynamics of deposited ions on vegetation. The EES significantly increased the deposition rates of Cl-, SO42- and Na+ in an area of about 639-1062 m surrounding the sprayers. Similarly, higher deposition of Ca 2+ and K+ caused by the EES was detected only when deposition was assessed using nylon filters or lyophilized branches. Deposition fluxes of NO3-, NH4+ and Se were not affected by the spraying system. Techniques for measuring dry deposition and calculating landscape-level depositional loads in non-forested systems need further development. ?? 2005 Elsevier Ltd. All rights reserved.

Spitzer Space Telescope proposal process

NASA Astrophysics Data System (ADS)

Laine, S.; Silbermann, N. A.; Rebull, L. M.; Storrie-Lombardi, L. J.

2006-06-01

This paper discusses the Spitzer Space Telescope General Observer proposal process. Proposals, consisting of the scientific justification, basic contact information for the observer, and observation requests, are submitted electronically using a client-server Java package called Spot. The Spitzer Science Center (SSC) uses a one-phase proposal submission process, meaning that fully-planned observations are submitted for most proposals at the time of submission, not months after acceptance. Ample documentation and tools are available to the observers on SSC web pages to support the preparation of proposals, including an email-based Helpdesk. Upon submission proposals are immediately ingested into a database which can be queried at the SSC for program information, statistics, etc. at any time. Large proposals are checked for technical feasibility and all proposals are checked against duplicates of already approved observations. Output from these tasks is made available to the Time Allocation Committee (TAC) members. At the review meeting, web-based software is used to record reviewer comments and keep track of the voted scores. After the meeting, another Java-based web tool, Griffin, is used to track the approved programs as they go through technical reviews, duplication checks and minor modifications before the observations are released for scheduling. In addition to detailing the proposal process, lessons learned from the first two General Observer proposal calls are discussed.

Crew Transportation Technical Standards and Design Evaluation Criteria

NASA Technical Reports Server (NTRS)

Lueders, Kathryn L.; Thomas, Rayelle E. (Compiler)

2015-01-01

Crew Transportation Technical Standards and Design Evaluation Criteria contains descriptions of technical, safety, and crew health medical processes and specifications, and the criteria which will be used to evaluate the acceptability of the Commercial Providers' proposed processes and specifications.

"You Will": Technology, Magic, and the Cultural Contexts of Technical Communication.

ERIC Educational Resources Information Center

Kitalong, Karla Saari

2000-01-01

Provides some background on the use of magical language in technical contexts, gives examples of magical discourse in technology advertisements and newsmagazine articles, and proposes a technical communication pedagogy of media analysis. Notes that the proposed pedagogy involves students conducting diagnostic critiques of media texts and affords…

48 CFR 1352.215-70 - Proposal preparation.

Code of Federal Regulations, 2012 CFR

2012-10-01

...; justifications for noncompetitive proposed subcontracts; identification of technical data to be withheld; and any... evaluation factor.] Evaluation Factor 1—Technical Approach. Provide information on how the project is to be organized, staffed, and managed that demonstrates the offeror's understanding and effective management of...

48 CFR 915.404-2 - Information to support proposal analysis.

Code of Federal Regulations, 2010 CFR

2010-10-01

... for the auditor's review. (ii) Copies of technical analysis reports prepared by DOE technical or other... proposal analysis. 915.404-2 Section 915.404-2 Federal Acquisition Regulations System DEPARTMENT OF ENERGY... support proposal analysis. (a)(1) Field pricing assistance as discussed in FAR 15.404-2(a) is not required...

Technical Degrees and Higher Vocational Education

ERIC Educational Resources Information Center

Hordern, Jim

2017-01-01

This paper focuses on the proposals for the introduction of "technical degrees" in English higher education institutions advanced by the Labour Party's Liam Byrne in a document entitled "Robbins Rebooted" which was published in August 2014 by the Social Market Foundation. The context and rationale for the proposed technical…

48 CFR 2015.305 - Proposal evaluation.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Proposal evaluation. 2015.305 Section 2015.305 Federal Acquisition Regulations System NUCLEAR REGULATORY COMMISSION CONTRACTING... information to members of the Source Evaluation Panel at the same time technical proposals are distributed for...

Platyamoeba pseudovannellida n. sp., a naked amoeba with wide salt tolerance isolated from the Salton Sea, California.

PubMed

Hauer, G; Rogerson, A; Anderson, O R

2001-01-01

A new species of naked amoeba, Platyamoeba pseudovannellida n.sp., is described on the basis of light microscopic and fine structural features. The amoeba was isolated from the Salton Sea, California, from water at a salinity of ca. 44%. Locomotive amoebae occasionally had a spatulate outline and floating cells had radiating pseudopodia, sometimes with pointed tips. Both these features are reminiscent of the genus Vannella. However, the surface coat (glycocalyx) as revealed by TEM indicates that this is a species of Platyamoeba. Although salinity was not used as a diagnostic feature, this species was found to have remarkable tolerance to fluctuating salinity levels, even when changes were rapid. Amoebae survived over the range 0 per thousand to 150 per thousand salt and grew within the range 0 per thousand to 138 per thousand salt. The generation time of cells averaged 29 h and was not markedly affected by salt concentration. This is longer than expected for an amoeba of this size and suggests a high energetic cost of coping with salinity changes. The morphology of cells changed with increasing salinity: at 0 per thousand cells were flattened and active and at the other extreme (138 per thousand) amoebae were wrinkled and domed and cell movement was very slow. At the ultrastructural level, the cytoplasm of cells grown at high salinity (98 per thousand was considerably denser than that of cells reared at 0 per thousand.

77 FR 11106 - Proposed Agency Information Collection

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-24

... register with PAMS to view the proposals that were submitted. They will also be able to maintain a minimal... research project. Lab technical proposals must be completed by DOE National Laboratories in order to... Office of Science to submit a proposal for funding through an interagency agreement. Neither lab nor...

Preliminary Magnetostratigraphic Study of the Split Mountain and Lower Imperial Groups, Split Mountain Gorge, Western Salton Trough, CA

NASA Astrophysics Data System (ADS)

Fluette, A. L.; Housen, B. A.; Dorsey, R. J.

2004-12-01

We present preliminary results of a magnetostratigraphic study of Miocene-Pliocene sedimentary rocks of the Split Mt. and lower Imperial Groups exposed in Split Mt. Gorge and eastern Fish Creek-Vallecito basin, western Salton Trough. Precise age control for the base of this thick section is needed to improve our understanding of the early history of extension-related subsidence in this region. The geologic setting and stratigraphic framework are known from previous work by Dibblee (1954, 1996), Woodard (1963), Kerr (1982), Winker (1987), Kerr and Kidwell (1991), Winker and Kidwell (1986; 1996), and others. We have analyzed Upper Miocene to lower Pliocene strata exposed in a conformable section in Split Mt. Gorge, including (in order from the base; nomenclature of Winker and Kidwell, 1996): (1) Split Mt. Group: Red Rock Fm alluvial sandstone; Elephant Trees alluvial conglomerate; and lower megabreccia unit; and (2) lower part of Imperial Group, including: Fish Creek Gypsum; proximal to distal turbidites of the Latrania Fm and Wind Caves Mbr of Deguynos Fm; upper megabreccia unit; marine mudstone and rhythmites of the Mud Hills Mbr (Deguynos Fm); and the basal part of the Yuha Mbr (Deguynos Fm). Measured thickness from the base of the Elephant Trees Cgl to the base of the Yuha Mbr is about 1050 m, consistent with previous measurements of Winker (1987). Paleomagnetic samples were collected at approximately 10 m intervals throughout this section. The upper portion of our sampled section overlaps with the lower part of the section sampled for magnetostratigraphic study by Opdyke et al. (1977) and Johnson et al. (1983). They interpreted the base of their section to be about 4.3 Ma, and calculated an average sedimentation rate of approximately 5.5 mm/yr for the lower part of their section. Good-quality preliminary results from 15 paleomagnetic sites distributed throughout our sampled section permit preliminary identification of 6 polarity zones. Based on regional mapping

Analysis of earthquake clustering and source spectra in the Salton Sea Geothermal Field

NASA Astrophysics Data System (ADS)

Cheng, Y.; Chen, X.

2015-12-01

The Salton Sea Geothermal field is located within the tectonic step-over between San Andreas Fault and Imperial Fault. Since the 1980s, geothermal energy exploration has resulted with step-like increase of microearthquake activities, which mirror the expansion of geothermal field. Distinguishing naturally occurred and induced seismicity, and their corresponding characteristics (e.g., energy release) is important for hazard assessment. Between 2008 and 2014, seismic data recorded by a local borehole array were provided public access from CalEnergy through SCEC data center; and the high quality local recording of over 7000 microearthquakes provides unique opportunity to sort out characteristics of induced versus natural activities. We obtain high-resolution earthquake location using improved S-wave picks, waveform cross-correlation and a new 3D velocity model. We then develop method to identify spatial-temporally isolated earthquake clusters. These clusters are classified into aftershock-type, swarm-type, and mixed-type (aftershock-like, with low skew, low magnitude and shorter duration), based on the relative timing of largest earthquakes and moment-release. The mixed-type clusters are mostly located at 3 - 4 km depth near injection well; while aftershock-type clusters and swarm-type clusters also occur further from injection well. By counting number of aftershocks within 1day following mainshock in each cluster, we find that the mixed-type clusters have much higher aftershock productivity compared with other types and historic M4 earthquakes. We analyze detailed spatial variation of 'b-value'. We find that the mixed-type clusters are mostly located within high b-value patches, while large (M>3) earthquakes and other types of clusters are located within low b-value patches. We are currently processing P and S-wave spectra to analyze the spatial-temporal correlation of earthquake stress parameter and seismicity characteristics. Preliminary results suggest that the

14 CFR 1260.17 - Evaluation and selection of unsolicited proposals.

Code of Federal Regulations, 2010 CFR

2010-01-01

.... NASA recommends contact with NASA technical personnel before submission of an unsolicited proposal to...) prepared by the cognizant technical office. The JAUP shall be submitted for the approval of the grant officer after review and concurrence at a level above the technical officer. However, review and...

Interoperability Policy Roadmap

DTIC Science & Technology

2010-01-01

Retrieval – SMART The technique developed by Dr. Gerard Salton for automated information retrieval and text analysis is called the vector-space... Salton , G., Wong, A., Yang, C.S., “A Vector Space Model for Automatic Indexing”, Commu- nications of the ACM, 18, 613-620. [10] Salton , G., McGill

The Technical Baccalaureate: Providing Excellence in Vocational Education?

ERIC Educational Resources Information Center

Acquah, Daniel K.; Malpass, Debra

2017-01-01

Proposals for a technical baccalaureate have received cross-party support in England. The technical baccalaureate is intended to deliver the necessary training to enable young people to fill the UK's skills gap in intermediate-level occupations in STEM and other sectors. This paper explores how to design and implement a high-quality technical…

75 FR 60494 - Notice of Proposed Guidance and Request for Comment on the Federal Transit Administration's...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-30

... on the Federal Transit Administration's research, technical assistance, and training programs and seeks comment thereon. Proposed FTA Circular 6100.1D, ``Research, Technical Assistance, and Training... Proposed Guidance and Request for Comment on the Federal Transit Administration's Research, Technical...

Technical Writing Needs Assessment.

ERIC Educational Resources Information Center

Oakland Community Coll., Farmington, MI. Office of Institutional Planning and Analysis.

In fall 1991, a study was conducted by Oakland Community College (OCC) to evaluate the need for a proposed Technical Writing program. General information was gathered from a literature review, Michigan Occupational Information System data, interviews with professionals in the field, and a 1987 needs assessment conducted by Washtenaw Community…

Relation of desert pupfish abundance to selected environmental variables in natural and manmade habitats in the Salton Sea basin

USGS Publications Warehouse

Martin, B.A.; Saiki, M.K.

2005-01-01

We assessed the relation between abundance of desert pupfish, Cyprinodon macularius, and selected biological and physicochemical variables in natural and manmade habitats within the Salton Sea Basin. Field sampling in a natural tributary, Salt Creek, and three agricultural drains captured eight species including pupfish (1.1% of the total catch), the only native species encountered. According to Bray-Curtis resemblance functions, fish species assemblages differed mostly between Salt Creek and the drains (i.e., the three drains had relatively similar species assemblages). Pupfish numbers and environmental variables varied among sites and sample periods. Canonical correlation showed that pupfish abundance was positively correlated with abundance of western mosquitofish, Gambusia affinis, and negatively correlated with abundance of porthole livebearers, Poeciliopsis gracilis, tilapias (Sarotherodon mossambica and Tilapia zillii), longjaw mudsuckers, Gillichthys mirabilis, and mollies (Poecilia latipinnaandPoecilia mexicana). In addition, pupfish abundance was positively correlated with cover, pH, and salinity, and negatively correlated with sediment factor (a measure of sediment grain size) and dissolved oxygen. Pupfish abundance was generally highest in habitats where water quality extremes (especially high pH and salinity, and low dissolved oxygen) seemingly limited the occurrence of nonnative fishes. This study also documented evidence of predation by mudsuckers on pupfish. These findings support the contention of many resource managers that pupfish populations are adversely influenced by ecological interactions with nonnative fishes. ?? Springer 2005.

Technical writing versus technical writing

NASA Technical Reports Server (NTRS)

Dillingham, J. W.

1981-01-01

Two terms, two job categories, 'technical writer' and 'technical author' are discussed in terms of industrial and business requirements and standards. A distinction between 'technical writing' and technical 'writing' is made. The term 'technical editor' is also considered. Problems inherent in the design of programs to prepare and train students for these jobs are discussed. A closer alliance between industry and academia is suggested as a means of preparing students with competent technical communication skills (especially writing and editing skills) and good technical skills.

Proposal Pitfalls Plaguing Researchers: Can Technical Communicators Make a Difference?

ERIC Educational Resources Information Center

Lemanski, Steve

2014-01-01

The facts bear out that the odds are against most scientific researchers and scholars--especially those just starting out--in their attempts to win funding for their research projects through their grant proposals. In this article, the author takes a close look at some of the proposal-related problems and pitfalls that have historically challenged…

Seismic calibration shots conducted in 2009 in the Imperial Valley, southern California, for the Salton Seismic Imaging Project (SSIP)

USGS Publications Warehouse

Murphy, Janice; Goldman, Mark; Fuis, Gary; Rymer, Michael; Sickler, Robert; Miller, Summer; Butcher, Lesley; Ricketts, Jason; Criley, Coyn; Stock, Joann; Hole, John; Chavez, Greg

2011-01-01

Rupture of the southern section of the San Andreas Fault, from the Coachella Valley to the Mojave Desert, is believed to be the greatest natural hazard facing California in the near future. With an estimated magnitude between 7.2 and 8.1, such an event would result in violent shaking, loss of life, and disruption of lifelines (freeways, aqueducts, power, petroleum, and communication lines) that would bring much of southern California to a standstill. As part of the Nation's efforts to prevent a catastrophe of this magnitude, a number of projects are underway to increase our knowledge of Earth processes in the area and to mitigate the effects of such an event. One such project is the Salton Seismic Imaging Project (SSIP), which is a collaborative venture between the United States Geological Survey (USGS), California Institute of Technology (Caltech), and Virginia Polytechnic Institute and State University (Virginia Tech). This project will generate and record seismic waves that travel through the crust and upper mantle of the Salton Trough. With these data, we will construct seismic images of the subsurface, both reflection and tomographic images. These images will contribute to the earthquake-hazard assessment in southern California by helping to constrain fault locations, sedimentary basin thickness and geometry, and sedimentary seismic velocity distributions. Data acquisition is currently scheduled for winter and spring of 2011. The design and goals of SSIP resemble those of the Los Angeles Region Seismic Experiment (LARSE) of the 1990's. LARSE focused on examining the San Andreas Fault system and associated thrust-fault systems of the Transverse Ranges. LARSE was successful in constraining the geometry of the San Andreas Fault at depth and in relating this geometry to mid-crustal, flower-structure-like decollements in the Transverse Ranges that splay upward into the network of hazardous thrust faults that caused the 1971 M 6.7 San Fernando and 1987 M 5

Field, Laboratory and Imaging spectroscopic Analysis of Landslide, Debris Flow and Flood Hazards in Lacustrine, Aeolian and Alluvial Fan Deposits Surrounding the Salton Sea, Southern California

NASA Astrophysics Data System (ADS)

Hubbard, B. E.; Hooper, D. M.; Mars, J. C.

2015-12-01

High resolution satellite imagery, field spectral measurements using a portable ASD spectrometer, and 2013 hyperspectral AVIRIS imagery were used to evaluate the age of the Martinez Mountain Landslide (MML) near the Salton Sea, in order to determine the relative ages of adjacent alluvial fan surfaces and the potential for additional landslides, debris flows, and floods. The Salton Sea (SS) occupies a pluvial lake basin, with ancient shorelines ranging from 81 meters to 113 meters above the modern lake level. The highest shoreline overlaps the toe of the 0.24 - 0.38 km3 MML deposit derived from hydrothermally altered granites exposed near the summit of Martinez Mountain. The MML was originally believed to be of early Holocene age. However, AVIRIS mineral maps show abundant desert varnish on the top and toe of the landslide. Desert varnish can provide a means of relative dating of alluvial fan (AF) or landslide surfaces, as it accumulates at determinable rates over time. Based on the 1) highest levels of desert varnish accumulation mapped within the basin, 2) abundant evaporite playa minerals on top of the toe of the landslide, and 3) the highest shoreline of the ancestral lake overtopping the toe of the landslide with gastropod and bivalve shells, we conclude that the MML predates the oldest alluvial fan terraces and lake sediments exposed in the Coachella and Imperial valleys and must be older than early Holocene (i.e. Late Pleistocene?). Thus, the MML landslide has the potential to be used as a spectral endmember for desert varnish thickness and thus proxy for age discrimination of active AF washes versus desert pavements. Given the older age of the MML landslide and low water levels in the modern SS, the risk from future rockslides of this size and related seiches is rather low. However, catastrophic floods and debris flows do occur along the most active AF channels; and the aftermath of such flows can be identified spectrally by montmorillonite crusts forming in

Collaborating for Success: Team Teaching the Engineering Technical Thesis

ERIC Educational Resources Information Center

Keating, Terrence; Long, Mike

2012-01-01

This paper will examine the collaborative teaching process undertaken at College of the North Atlantic-Qatar (CNA-Q) by Engineering and the Communication faculties to improve the overall quality of engineering students' capstone projects known as the Technical Thesis. The Technical Thesis is divided into two separate components: a proposal stage…

Technical Assistance To Tribal Communities Addressing Brownfields

EPA Pesticide Factsheets

This notice announces the availability of funds and solicits proposals from eligible entities (including eligible nonprofit organizations) to provide technical assistance to tribal communities on brownfield related issues.

7 CFR 1728.50 - Removal of an item from listing or technical acceptance.

Code of Federal Regulations, 2010 CFR

2010-01-01

... equipment will be notified in writing of a proposal to remove such item from the listing or technical... unanimous, the item will be referred to Technical Standards Committee “B.” Written notice of Technical...” decision, a sponsor may appeal in writing to Technical Standards Committee “B” to review Committee “A's...

78 FR 36012 - 30-Day Notice of Proposed Information Collection: Export Declaration of Defense Technical Data or...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-14

... your message. Fax: 202-395-5806. Attention: Desk Officer for Department of State. FOR FURTHER... and brokering of defense articles, defense services and related technical data are licensed by the... the business of manufacturing or exporting defense articles, defense services, and related technical...

10 CFR 52.80 - Contents of applications; additional technical information.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 10 Energy 2 2010-01-01 2010-01-01 false Contents of applications; additional technical information... APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.80 Contents of applications; additional technical information. The application must contain: (a) The proposed inspections, tests, and analyses, including those...

A study on technical efficiency of a DMU (review of literature)

NASA Astrophysics Data System (ADS)

Venkateswarlu, B.; Mahaboob, B.; Subbarami Reddy, C.; Sankar, J. Ravi

2017-11-01

In this research paper the concept of technical efficiency (due to Farell) [1] of a decision making unit (DMU) has been introduced and the measure of technical and cost efficiencies are derived. Timmer’s [2] deterministic approach to estimate the Cobb-Douglas production frontier has been proposed. The idea of extension of Timmer’s [2] method to any production frontier which is linear in parameters has been presented here. The estimation of parameters of Cobb-Douglas production frontier by linear programming approach has been discussed in this paper. Mark et al. [3] proposed a non-parametric method to assess efficiency. Nuti et al. [4] investigated the relationships among technical efficiency scores, weighted per capita cost and overall performance Gahe Zing Samuel Yank et al. [5] used Data envelopment analysis to assess technical assessment in banking sectors.

Preface

USGS Publications Warehouse

Friend, M.

2002-01-01

This issue of Hydrobiologia brings together a series of papers resulting from an intensified effort to describe the current status of the physical and biological conditions present at California's Salton Sea. Most of the studies were contract investigations that were part of a project initiated in January 1998 to pursue the improvement of environmental conditions at the Salton Sea. The remainder are independent investigations resulting in information of importance for the Salton Sea Restoration Project. The information provided by those investigations resulting in information of importance for the Salton Sea Restoration Project. The information provided by those investigations is the most holistic assembly of scientific knowledge about the Salton Sea ever brought together in a single publication. The resulting findings provide an important foundation of knowledge for what has been stated to be '. . . one of the worlds' most dynamic salt lakes . . .' (Hart et al., 1998). We hope this publication will serve as a catalyst to stimulate additional scientific investigations that will further enhance understanding of the dynamics of this unique ecosystem. The purpose for these introductory comments is to place the scientific investigations reported on and the Salton Sea Restoration Project in context and entities, and to one another.

Overview of the Kinematics of the Salton Trough and Northern Gulf of California

NASA Astrophysics Data System (ADS)

Stock, J. M.

2016-12-01

In the Salton Trough and Northern Gulf of California, transtensional rifting is leading to full continental plate breakup, as a major continental block is being transferred to an oceanic plate. Since at least 6 Ma this region has taken up most of the plate boundary slip between the Pacific and North America plates at this latitude. We review the structural history of plate separation, as constrained by many recent studies of present and past fault configurations, seismicity, and basin development as seen from geology and geophysics. Modern activity in the USA is dominated by NW-striking strike-slip faults (San Andreas, San Jacinto, Elsinore), and subsidiary NE-striking faults. There is an equally broad zone in Mexico (faults from the Mexicali Valley to the Colorado River Delta and bounding the Laguna Salada basin), including active low-angle detachment faults. In both areas, shifts in fault activity are indicated by buried faults and exhumed or buried earlier basin strata. Seismicity defines 3 basin segments in the N Gulf: Consag-Wagner, Upper Delfin, and Lower Delfin, but localization is incomplete. These basins occupy a broad zone of modern deformation, lacking single transform faults, although major strike-slip faults formed in the surrounding continental area. The off-boundary deformation on the western side of the plate boundary has changed with time, as seen by Holocene and Quaternary faults controlling modern basins in the Gulf Extensional Province of NE Baja California, and stranded Pliocene continental and marine basin strata in subaerial fault blocks. The eastern side of the plate boundary, in the shallow northeastern Gulf, contains major NW-striking faults that may have dominated the earlier (latest Miocene-early Pliocene) kinematics. The Sonoran coastal plain likely buries additional older faults and basin sequences; further studies here are needed to refine models of the earlier structural development of this sector. Despite > 250 km of plate

Proprietary Manned Space Flight Proposals, 1973 to 2013, plus

NASA Astrophysics Data System (ADS)

Fisher, Philip

2016-03-01

In 1973 a concept for a manned space flight experiment was submitted to NASA as an unsolicited proprietary proposal,*. In 1998*, 2004*, and 2013* proposals successively more details were provided. An abbreviation of the 1998 proposal was published. By 2013 the five technical variables of 1998 had increased to over ten. Some technical and management details of the proposals will be presented and updated. The first flight of two could use some hardware now being developed. The experiment seems superior to any mission publicly advocated by NASA, so this talk's purpose is to encourage NASA to delay landing humans on Mars until the first spacecraft can be developed and activated. *Complete proposals are in the Philip C. Fisher papers, Niels Bohr Library and Archives, American Institute of Physics (available one year after author's death). Work after 1982 supported by successive forms of Ruffner Associates.

75 FR 12740 - Wyoming Interstate Company, Inc.; Notice of Technical Conference

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-17

... additional technical, engineering, and operational support for its proposed gas quality allocation procedures... should be prepared to support its position with adequate technical, engineering, and operational information. FERC conferences are accessible under section 508 of the Rehabilitation Act of 1973. For...

Structure of the San Andreas Fault Zone in the Salton Trough Region of Southern California: A Comparison with San Andreas Fault Structure in the Loma Prieta Area of Central California

NASA Astrophysics Data System (ADS)

Fuis, G. S.; Catchings, R.; Scheirer, D. S.; Goldman, M.; Zhang, E.; Bauer, K.

2016-12-01

The San Andreas fault (SAF) in the northern Salton Trough, or Coachella Valley, in southern California, appears non-vertical and non-planar. In cross section, it consists of a steeply dipping segment (75 deg dip NE) from the surface to 6- to 9-km depth, and a moderately dipping segment below 6- to 9-km depth (50-55 deg dip NE). It also appears to branch upward into a flower-like structure beginning below about 10-km depth. Images of the SAF zone in the Coachella Valley have been obtained from analysis of steep reflections, earthquakes, modeling of potential-field data, and P-wave tomography. Review of seismological and geodetic research on the 1989 M 6.9 Loma Prieta earthquake, in central California (e.g., U.S. Geological Survey Professional Paper 1550), shows several features of SAF zone structure similar to those seen in the northern Salton Trough. Aftershocks in the Loma Prieta epicentral area form two chief clusters, a tabular zone extending from 18- to 9-km depth and a complex cluster above 5-km depth. The deeper cluster has been interpreted to surround the chief rupture plane, which dips 65-70 deg SW. When double-difference earthquake locations are plotted, the shallower cluster contains tabular subclusters that appear to connect the main rupture with the surface traces of the Sargent and Berrocal faults. In addition, a diffuse cluster may surround a steep to vertical fault connecting the main rupture to the surface trace of the SAF. These interpreted fault connections from the main rupture to surface fault traces appear to define a flower-like structure, not unlike that seen above the moderately dipping segment of the SAF in the Coachella Valley. But importantly, the SAF, interpreted here to include the main rupture plane, appears segmented, as in the Coachella Valley, with a moderately dipping segment below 9-km depth and a steep to vertical segment above that depth. We hope to clarify fault-zone structure in the Loma Prieta area by reanalyzing active

Occurrence of wide-chain Ca-pyriboles as primary crystals in the Salton Sea Geothermal Field, California, USA

NASA Astrophysics Data System (ADS)

Yau, Yu-Chyi; Peacor, Donald R.; Essene, Eric J.

1986-09-01

Amphiboles and pyroxenes occurring in the Salton Sea Geothermal Field were found to contain coherent intergrowths of chain silicates with other than double and single chain widths by using transmission and analytical electron microscopy. Both occur in the biotite zone at the temperature (depth) interval of 310° C (1,060 m) to 330° C (1,547m) which approximately corresponds to temperatures of the greenschist facies. The amphiboles occur as euhedral fibrous crystals occupying void space and are composed primarily of irregularly alternating (010) slabs of double or triple chains, with rare quadruple and quintuple chains. Primary crystallization from solution results in euhedral crystals. Clinopyroxenes formed mainly as a porefilling cement and subordinately as prismatic crystals coexisting with fibrous amphiboles. Fine lamellae of double and triple chains are irregularly intercalated with pyroxene. AEM analyses yield formulae (Ca1.8Mg2.9Fe1.9Mn0.1) Si8O21.8(OH)1.8 (310° C) and (Ca2.0Fe2.5Mg2.3) Si8O21.8 (OH)2.0 (330° C) for amphiboles and (Ca1.1Fe0.6Mg0.3) Si2O6 for clinopyroxene. Thermodynamic calculations at Pfluid=100 bar of equilibrium reactions of (1) 3 chlorite +10 calcite + 21 quartz = 3 actinolite + 2 clinozoisite + 8 H2O + 10 CO2 and (2) actinolite+ 3 calcite+ 2 quartz = 5 clinopyroxene + H2O + 3 CO2 using Mg-end member phases indicate that formation of amphibole and pyroxene require very water-rich conditions (X_{CO_2 } < 0.06) at temperatures below 330° C.

Laboratory investigations

NASA Astrophysics Data System (ADS)

1984-09-01

The primary objectives were to examine the site-specific physical, chemical, and biological factors that impact construction, durability and performance of the proposed 5-MW (sub e) solar pond system at the Salton Sea. The interactions of the water, salt, and soil of the site and on material compatibility were examined. Potential interactions of the water/brine and soil are particularly important because the pond will utilize the naturally occurring clays as a bottom seal. Although there is a considerable and growing solar pond literature, little written information deals with the important site-specific investigations of water, salt, and soil. Therefore, technical effort was directed toward identifying the factors that should be investigated and determining methods of investigation. As a result, a by-product was the development of an approach for site-specific investigations and some specific methodologies. This development should continue in order to establish a generic approach for evaluating the suitability of any site for the construction of large-scale solar ponds.

Laboratory Investigations

NASA Technical Reports Server (NTRS)

1984-01-01

The primary objectives were to examine the site-specific physical, chemical, and biological factors that impact construction, durability and performance of the proposed 5-MW (sub e) solar pond system at the Salton Sea. The interactions of the water, salt, and soil of the site and on material compatibility were examined. Potential interactions of the water/brine and soil are particularly important because the pond will utilize the naturally occurring clays as a bottom seal. Although there is a considerable and growing solar pond literature, little written information deals with the important site-specific investigations of water, salt, and soil. Therefore, technical effort was directed toward identifying the factors that should be investigated and determining methods of investigation. As a result, a by-product was the development of an approach for site-specific investigations and some specific methodologies. This development should continue in order to establish a generic approach for evaluating the suitability of any site for the construction of large-scale solar ponds.

Preliminary Training Proposal for Cessna Aircraft of Independence.

ERIC Educational Resources Information Center

Independence Community Coll., KS.

This proposal for a program designed to train workers to manufacture single-engine, piston-driven aircraft for Cessna Corporation was developed by Independence Community College in conjunction with Pittsburgh State University (Kansas) and the Southeast Kansas Area Vocational-Technical School. The proposal provides for on-site training in a…

Trends in liability affecting technical writers

NASA Technical Reports Server (NTRS)

Driskill, L. P.

1981-01-01

Liability of technical writers for defective products is explored. Documents generated during a product's life cycle (including design memos, design tests, clinical trials, trial use reports, letters, and proposals) become relevant because they are likely to become the only available means of showing that the product was not defectively designed. These documents become the evidence that the product underwent balanced and well considered planning, development, testing, quality control, and field testing. The predicted increased involvement of technical writers in the prevention and defense of product liability claims is cited in view of a greater number of cases turning on "failure to warn".

10 CFR 601.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

10 CFR 601.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

49 CFR 20.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

49 CFR 20.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

49 CFR 20.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

10 CFR 601.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

10 CFR 601.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

49 CFR 20.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-10-01

... to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

77 FR 69579 - Proposed Requirements, Definitions, and Selection Criteria-Native American Career and Technical...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-20

... to support secondary school career and technical education programs. Any Indian tribe, tribal... education schools, local workforce investment boards, business and industry, and intermediaries, as well as... State in which the applicant is located has established under the Elementary and Secondary Education Act...

76 FR 20364 - Notice of Proposed Information Collection: Comment Request; Technical Assistance for Community...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-12

... Information Collection: Comment Request; Technical Assistance for Community Planning and Development Programs AGENCY: Office of the Assistant Secretary for Community Planning And Development, HUD. ACTION: Notice... Community Planning and Development, Department of Housing Urban and Development, 451 7th Street, SW., Room...

Autocorrelation and Regularization of Query-Based Information Retrieval Scores

DTIC Science & Technology

2008-02-01

of the most general information retrieval models [ Salton , 1968]. By treating a query as a very short document, documents and queries can be rep... Salton , 1971]. In the context of single link hierarchical clustering, Jardine and van Rijsbergen showed that ranking all k clusters and retrieving a...a document about “dogs”, then the system will always miss this document when a user queries “dog”. Salton recognized that a document’s representation

49 CFR 20.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.23 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 311.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

12 CFR 411.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

10 CFR 601.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1158.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... analysis directly applying any professional or technical discipline. For example, drafting of a legal... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 311.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-10-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

12 CFR 411.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.23 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.23 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.23 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.300 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

49 CFR 20.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.300 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1158.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... limited to advice and analysis directly applying any professional or technical discipline. For example... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

7 CFR 3018.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 138.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... analysis directly applying any professional or technical discipline. For example, drafting of a legal... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

12 CFR 411.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... analysis directly applying any professional or technical discipline. For example, drafting of a legal... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 311.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting of a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1158.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 1168.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

10 CFR 601.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 227.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

20 CFR 438.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 519.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... and analysis directly applying any professional or technical discipline. For example, drafting or a... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

12 CFR 411.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... advice and analysis directly applying any professional or technical discipline. For example, drafting of... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

Translating PI observing proposals into ALMA observing scripts

NASA Astrophysics Data System (ADS)

Liszt, Harvey S.

2014-08-01

The ALMA telescope is a complex 66-antenna array working in the specialized domain of mm- and sub-mm aperture synthesis imaging. To make ALMA accessible to technically inexperienced but scientifically expert users, the ALMA Observing Tool (OT) has been developed. Using the OT, scientifically oriented user input is formatted as observing proposals that are packaged for peer-review and assessment of technical feasibility. If accepted, the proposal's scientifically oriented inputs are translated by the OT into scheduling blocks, which function as input to observing scripts for the telescope's online control system. Here I describe the processes and practices by which this translation from PI scientific goals to online control input and schedule block execution actually occurs.

29 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

24 CFR 87.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

6 CFR 9.15 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

29 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

32 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

24 CFR 87.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

12 CFR 411.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

13 CFR 146.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.15 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

32 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

24 CFR 87.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-10-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

38 CFR 45.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

24 CFR 87.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-04-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 1158.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

13 CFR 146.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

6 CFR 9.15 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

12 CFR 411.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

38 CFR 45.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

13 CFR 146.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

38 CFR 45.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 1158.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

32 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 1158.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

6 CFR 9.15 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

29 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

45 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

38 CFR 45.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

... or technical discipline. For example, drafting of a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

12 CFR 411.300 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

12 CFR 411.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... analysis directly applying any professional or technical discipline. For example, drafting or a legal... engineering analysis prior to the preparation or submission of a bid or proposal are not allowable under this...

13 CFR 146.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

... shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

29 CFR 93.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... professional or technical discipline. For example, drafting of a legal document accompanying a bid or proposal... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

Method of identification of patent trends based on descriptions of technical functions

NASA Astrophysics Data System (ADS)

Korobkin, D. M.; Fomenkov, S. A.; Golovanchikov, A. B.

2018-05-01

The use of the global patent space to determine the scientific and technological priorities for the technical systems development (identifying patent trends) allows one to forecast the direction of the technical systems development and, accordingly, select patents of priority technical subjects as a source for updating the technical functions database and physical effects database. The authors propose an original method that uses as trend terms not individual unigrams or n-gram (usually for existing methods and systems), but structured descriptions of technical functions in the form “Subject-Action-Object” (SAO), which in the authors’ opinion are the basis of the invention.

Benchmarking Equity in Transfer Policies for Career and Technical Associate's Degrees

ERIC Educational Resources Information Center

Chase, Megan M.

2011-01-01

Using critical policy analysis, this study considers state policies that impede technical credit transfer from public 2-year colleges to 4-year institutions of higher education. The states of Ohio, Texas, Washington, and Wisconsin are considered, and seven policy benchmarks for facilitating the transfer of technical credits are proposed. (Contains…

43 CFR 18.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 604.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

18 CFR 1315.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

18 CFR 1315.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 604.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

31 CFR 21.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

18 CFR 1315.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 712.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

40 CFR 34.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 712.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

40 CFR 34.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

31 CFR 21.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

14 CFR 1271.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

31 CFR 21.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

45 CFR 604.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

43 CFR 18.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

14 CFR 1271.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

40 CFR 34.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

15 CFR 28.205 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

18 CFR 1315.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

28 CFR 69.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

22 CFR 712.205 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-04-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

14 CFR 1271.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

31 CFR 21.205 - Professional and technical services.

Code of Federal Regulations, 2011 CFR

2011-07-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

FUB at TREC 2008 Relevance Feedback Track: Extending Rocchio with Distributional Term Analysis

DTIC Science & Technology

2008-11-01

starting point is the improved version [ Salton and Buckley 1990] of the original Rocchio’s formula [Rocchio 1971]: newQ = α ⋅ origQ + β R r r∈R ∑ − γR...earlier studies about the low effect of the main relevance feedback parameters on retrieval performance (e.g., Salton and Buckley 1990), while they seem...Relevance feedback in information retrieval. In The SMART retrieval system - experiments in automatic document processing, Salton , G., Ed., Prentice Hall

Technical editing and the effective communication of scientific results

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pieper, G.W.; Picologlou, S.M.

1996-05-01

Communication of scientific results--whether for professional journals, poster sessions, oral presentations, or the popular press--is an essential part of any scientific investigation. The technical editor plays an important rolein ensuring that scientists express their results correctly and effectively. Technical editing comprises far more than simple proofreading. The editor`s tasks may range from restructuring whole parpagrphs and suggesting improved graphical aids to writing abstracts and preparing first drafts of proposals. The technical editor works closely with scientists to present complex ideas to differentaudiences, including fellow scentists, funding agencies, and the general public. New computer technologyhas also involved the technical editor notmore » only with on-line editing but also with preparing CD ROMs and World Wide Web pages.« less

78 FR 14361 - Proposal Review; Notice of Meetings

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-05

... awards. The review and evaluation may also include assessment of the progress of awarded proposals. The... confidential nature, including technical information; financial data, such as salaries; and personal...

78 FR 54686 - Proposal Review; Notice of Meetings

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-05

... awards. The review and evaluation may also include assessment of the progress of awarded proposals. The... confidential nature, including technical information; financial data, such as salaries; and personal...

Discovering new events beyond the catalogue—application of empirical matched field processing to Salton Sea geothermal field seismicity

DOE PAGES

Wang, Jingbo; Templeton, Dennise C.; Harris, David B.

2015-07-30

Using empirical matched field processing (MFP), we compare 4 yr of continuous seismic data to a set of 195 master templates from within an active geothermal field and identify over 140 per cent more events than were identified using traditional detection and location techniques alone. In managed underground reservoirs, a substantial fraction of seismic events can be excluded from the official catalogue due to an inability to clearly identify seismic-phase onsets. Empirical MFP can improve the effectiveness of current seismic detection and location methodologies by using conventionally located events with higher signal-to-noise ratios as master events to define wavefield templatesmore » that could then be used to map normally discarded indistinct seismicity. Since MFP does not require picking, it can be carried out automatically and rapidly once suitable templates are defined. In this application, we extend MFP by constructing local-distance empirical master templates using Southern California Earthquake Data Center archived waveform data of events originating within the Salton Sea Geothermal Field. We compare the empirical templates to continuous seismic data collected between 1 January 2008 and 31 December 2011. The empirical MFP method successfully identifies 6249 additional events, while the original catalogue reported 4352 events. The majority of these new events are lower-magnitude events with magnitudes between M0.2–M0.8. Here, the increased spatial-temporal resolution of the microseismicity map within the geothermal field illustrates how empirical MFP, when combined with conventional methods, can significantly improve seismic network detection capabilities, which can aid in long-term sustainability and monitoring of managed underground reservoirs.« less

Proposed Unit Level Ozone Season NOx Allowance Allocations to Existing Units in Six States: Supplemental Proposed Rule TSD

EPA Pesticide Factsheets

This Technical Support Document (TSD) presents the proposed unit-level allocations based on the existing-unit portion of each state’s ozone season NOx emission budget to covered existing units in Iowa, Kansas, Michigan, Missouri, Oklahoma, and Wisconsin.

44 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-10-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

32 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... technical discipline. For example, drafting of a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

38 CFR 45.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

44 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

38 CFR 45.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

45 CFR 1230.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-10-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

32 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... technical discipline. For example, drafting of a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

38 CFR 45.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

44 CFR 18.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

32 CFR 28.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... technical discipline. For example, drafting of a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

45 CFR 1230.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-10-01

... technical discipline. For example, drafting or a legal document accompanying a bid or proposal by a lawyer... influence made by an engineer providing an engineering analysis prior to the preparation or submission of a...

76 FR 8720 - Notice of Proposed Solicitation for Cooperative Agreement Applications (SCAA)

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-15

... Procurement Technical Assistance Program (PTAP) by awarding cost sharing cooperative agreements to assist eligible entities in establishing or maintaining procurement technical assistance centers (PTACs) pursuant... available for distribution. Written comments regarding this proposed SCAA may be submitted via mail to...

IRRA at TREC 2009: Index Term Weighting based on Divergence From Independence Model

DTIC Science & Technology

2009-11-01

weighting scheme ( Salton and Buckley, 1988), where TF stands for the term frequency and IDF stands for the inverse document frequency. In contrast to TF...IDF is a collection dependent factor, which identifies the terms that concentrates in a few documents of the collection. Salton and Buckley (1988...chapter 4, pages 35–56. Butterworths, Oxford, UK, 1981. G. Salton and C. Buckley. Term-weighting approaches in automatic text retrieval. In Information Processing and Management, pages 513–523, 1988. 15

Implications of Metaphors in Defining Technical Communication.

ERIC Educational Resources Information Center

Beck, Charles E.

1991-01-01

Identifies four metaphors that appear dominant in current studies in the field of technical communication: transmitter, channel, balance, and bridge. Suggests limitations upon each of the metaphors. Discusses the alternative metaphors of lock, translator, transformer, synthesizer, conductor, and orchestrator. Proposes orchestration as a fruitful…

Quality Concerns in Technical Education in India: A Quantifiable Quality Enabled Model

ERIC Educational Resources Information Center

Gambhir, Victor; Wadhwa, N. C.; Grover, Sandeep

2016-01-01

Purpose: The paper aims to discuss current Technical Education scenarios in India. It proposes modelling the factors affecting quality in a technical institute and then applying a suitable technique for assessment, comparison and ranking. Design/methodology/approach: The paper chose graph theoretic approach for quantification of quality-enabled…

Annotated bibliography of structural equation modelling: technical work.

PubMed

Austin, J T; Wolfle, L M

1991-05-01

Researchers must be familiar with a variety of source literature to facilitate the informed use of structural equation modelling. Knowledge can be acquired through the study of an expanding literature found in a diverse set of publishing forums. We propose that structural equation modelling publications can be roughly classified into two groups: (a) technical and (b) substantive applications. Technical materials focus on the procedures rather than substantive conclusions derived from applications. The focus of this article is the former category; included are foundational/major contributions, minor contributions, critical and evaluative reviews, integrations, simulations and computer applications, precursor and historical material, and pedagogical textbooks. After a brief introduction, we annotate 294 articles in the technical category dating back to Sewall Wright (1921).

41 CFR 105-69.300 - Professional and technical services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... or technical discipline. For example, drafting or a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

41 CFR 105-69.300 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

... or technical discipline. For example, drafting or a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

41 CFR 105-69.300 - Professional and technical services.

Code of Federal Regulations, 2012 CFR

2012-01-01

... or technical discipline. For example, drafting or a legal document accompanying a bid or proposal by... the intent to influence made by an engineer providing an engineering analysis prior to the preparation...

14 CFR § 1271.205 - Professional and technical services.

Code of Federal Regulations, 2014 CFR

2014-01-01

...” shall be limited to advice and analysis directly applying any professional or technical discipline. For... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

Report on the "Proposed Library Reorganization".

ERIC Educational Resources Information Center

Lowry, Charles; And Others

A proposed reorganization plan for the J. Murrey Atkins Library of the University of North Carolina at Charlotte would organize the library in the collegial mold with two departments, Public Services and Technical Services. Within each department, librarians would form a faculty with emphasis on participatory management. Decisions involving the…

Technical specifications for mechanical recycling of agricultural plastic waste

DOE Office of Scientific and Technical Information (OSTI.GOV)

Briassoulis, D., E-mail: briassou@aua.gr; Hiskakis, M.; Babou, E.

Highlights: • Technical specifications for agricultural plastic wastes (APWs) recycling proposed. • Specifications are the base for best economical and environmental APW valorisation. • Analysis of APW reveals inherent characteristics and constraints of APW streams. • Thorough survey on mechanical recycling processes and industry as it applies to APW. • Specifications for APW recycling tested, adjusted and verified through pilot trials. - Abstract: Technical specifications appropriate for the recycling of agricultural plastic wastes (APWs), widely accepted by the recycling industry were developed. The specifications establish quality standards to be met by the agricultural plastics producers, users and the agricultural plasticmore » waste management chain. They constitute the base for the best economical and environmental valorisation of the APW. The analysis of the APW streams conducted across Europe in the framework of the European project “LabelAgriWaste” revealed the inherent characteristics of the APW streams and the inherent constraints (technical or economical) of the APW. The APW stream properties related to its recycling potential and measured during pilot trials are presented and a subsequent universally accepted simplified and expanded list of APW recycling technical specifications is proposed and justified. The list includes two sets of specifications, applied to two different quality categories of recyclable APW: one for pellet production process (“Quality I”) and another one for plastic profile production process (“Quality II”). Parameters that are taken into consideration in the specifications include the APW physical characteristics, contamination, composition and degradation. The proposed specifications are focused on polyethylene based APW that represents the vast majority of the APW stream. However, the specifications can be adjusted to cover also APW of different materials (e.g. PP or PVC) that are found in very small

NOAO observing proposal processing system

NASA Astrophysics Data System (ADS)

Bell, David J.; Gasson, David; Hartman, Mia

2002-12-01

Since going electronic in 1994, NOAO has continued to refine and enhance its observing proposal handling system. Virtually all related processes are now handled electronically. Members of the astronomical community can submit proposals through email, web form or via Gemini's downloadable Phase-I Tool. NOAO staff can use online interfaces for administrative tasks, technical reviews, telescope scheduling, and compilation of various statistics. In addition, all information relevant to the TAC process is made available online. The system, now known as ANDES, is designed as a thin-client architecture (web pages are now used for almost all database functions) built using open source tools (FreeBSD, Apache, MySQL, Perl, PHP) to process descriptively-marked (LaTeX, XML) proposal documents.

77 FR 31868 - Notice of Submission of Proposed Information Collection to OMB; Office of Native American...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-30

... Proposed Information Collection to OMB; Office of Native American Programs (ONAP) Training and Technical.... 552) authorizes HUD to award training and technical assistance contracts on a competitive basis. HUD intends to competitively award training and technical assistance contracts to national and regional...

77 FR 16250 - Notice of Proposed Information Collection for Public Comment; Office of Native American Programs...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-20

... Information Collection for Public Comment; Office of Native American Programs (ONAP) Training and Technical... subject proposal. The data required by Office of Native American Programs Training and Technical... progress. The data identifies needs, outputs and outcomes of the training and technical assistance. DATES...

77 FR 4586 - Notice of Opportunity for Public Comment on the Proposed Models for Plant-Specific Adoption of...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-30

... Comment on the Proposed Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler... on the proposed model safety evaluation (SE) for plant- specific adoption of Technical Specifications... System (ADAMS) under Accession Number ML103360003; the model application is available in ADAMS under...

The Vendors' Corner--The Request for Proposal.

ERIC Educational Resources Information Center

Sugnet, Chris; And Others

1987-01-01

Several online vendors address the issue of RFPs (requests for proposals) for library systems, discussing the documents' style, technical standards, library expectations, liabilities associated with using this procedure, factors in the decision to bid, and the need for a standardized document and national clearinghouse. (CLB)

A Proposal to Build an Education Research and Development Program: The Kamehameha Early Education Project Proposal. Technical Report #3.

ERIC Educational Resources Information Center

Gallimore, Ronald; And Others

This report summarizes the programmatic features of a proposal for the Kamehameha Early Education Project (KEEP), a program aimed at the development, demonstration, and dissemination of methods for improving the education of Hawaiian and part-Hawaiian children. A brief description of the proposed project goals, structure, organization, and…

75 FR 27552 - Credit Reforms in Organized Wholesale Electric Markets; Further Notice Concerning Technical...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-17

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. RM10-13-000] Credit Reforms in Organized Wholesale Electric Markets; Further Notice Concerning Technical Conference May 10, 2010... technical conference related to the Commission's Notice of Proposed Rulemaking on Credit Reforms in...

A Report by the Governor's Task Force on Vocational and Technical Education.

ERIC Educational Resources Information Center

Governor's Task Force on Vocational and Technical Education, Columbus, OH.

On July 19, 1968, a Task Force on Vocational and Technical Education was created by the governor of Ohio to develop proposals for organization, financing, and legislation. Some major problems to which the Task Force gave attention were: (1) the serious gap between the need for and the availability of vocational and technical education, (2) the…

75 FR 71526 - Corporate Credit Unions, Technical Corrections

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-24

... NATIONAL CREDIT UNION ADMINISTRATION 12 CFR Part 704 RIN 3133-AD58 Corporate Credit Unions... request for comments. SUMMARY: NCUA is issuing technical corrections to its corporate credit union rule... for submitting comments. NCUA Web site: http://www.ncua.gov/Resources/RegulationsOpinionsLaws/Proposed...

Promoting Teachers' Learning and Knowledge Building in a Socio-Technical System

ERIC Educational Resources Information Center

Tammets, Kairit; Pata, Kai; Laanpere, Mart

2013-01-01

The study proposes a way in which the learning and knowledge building (LKB) framework, which is consistent with the knowledge conversion phases proposed by Nonaka and Takeuchi, supports teachers' informal and self-directed workplace learning. An LKB framework in a socio-technical system was developed to support professional development in an…

7 CFR 1487.6 - What are the criteria for evaluating proposals?

Code of Federal Regulations, 2010 CFR

2010-01-01

... CREDIT CORPORATION, DEPARTMENT OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS TECHNICAL ASSISTANCE... completeness and will evaluate each proposal against the factors described in paragraph (a) of this section... within FAS for decision. FAS may, when appropriate to the subject matter of the proposal, request the...

76 FR 27952 - Small Business Size Standards: Professional, Scientific and Technical Services.

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-13

... Administration (SBA or Agency) proposed to increase small business size standards for 35 industries and one sub... SMALL BUSINESS ADMINISTRATION 13 CFR Part 121 RIN 3245-AG07 Small Business Size Standards: Professional, Scientific and Technical Services. AGENCY: U.S. Small Business Administration. ACTION: Proposed...

Brownfields Green Avenue Sites: Technical Memorandum - Conceptual Design for Sustainable Redevelopment

EPA Pesticide Factsheets

This technical memorandum briefly describes the site and proposed conceptual site plan, indicates conceptual design considerations, specifies recommended green and sustainable features, and offers other recommendations

78 FR 30940 - Proposal Review; Notice of Meetings

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-23

... NATIONAL SCIENCE FOUNDATION Proposal Review; Notice of Meetings In accordance with the Federal Advisory Committee Act (Pub. L. 92- 463, as amended), the National Science Foundation (NSF) announces its... confidential nature, including technical information; financial data, such as salaries; and personal...

48 CFR 315.201 - Exchanges with industry before receipt of proposals.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Exchanges with industry... Receipt of Proposals and Information 315.201 Exchanges with industry before receipt of proposals. (e)(1... complex projects involving R & D, IT, construction, and other highly technical requirements. An RFI may...

User Modeling for Contextual Suggestion

DTIC Science & Technology

2014-11-01

information retrieval literature ( Salton et al., 1975). To apply this metric, we converted the user interest model into a vector representation with all...Discovering Virtual Interest Groups across Chat Rooms, International Conference on Knowledge Management and Information Sharing (KMIS 2012). [7] Salton , G., A

A comparison of a technical and a participatory application of social impact assessment.

Treesearch

Dennis R Becker; Charles C Harris; Erik A Nielsen; William J. McLaughlin

2004-01-01

Results of independent applications of a technical and a participatory approach to SIA are compared for an assessment of impacts of the proposed removal of hydroelectric dams to recover threatened and endangered salmon in the Pacific Northwest of the United States. The analysis focuses on empirical differences and similarities between the technical social analysis...

INDOT Technical Training Plan : [Technical Summary

DOT National Transportation Integrated Search

2012-01-01

A wide range of job classifications, increasing technical : performance expectations, licensing and certification requirements, : budget restrictions and frequent department : reorganization has made technical training of employees : more difficult, ...

75 FR 30756 - Medicare Program; Supplemental Proposed Changes to the Hospital Inpatient Prospective Payment...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-02

.... 93.773, Medicare--Hospital Insurance; and Program No. 93.774, Medicare-- Supplementary Medical... technical errors that appeared in the supplementary proposed rule entitled ``Medicare Program; Supplemental... Doc. 2010-12567 filed May 21, 2010, there are technical and typographical errors that are identified...

34 CFR 82.300 - Professional and technical services.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 34 Education 1 2010-07-01 2010-07-01 false Professional and technical services. 82.300 Section 82.300 Education Office of the Secretary, Department of Education NEW RESTRICTIONS ON LOBBYING Activities... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

34 CFR 82.205 - Professional and technical services.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 34 Education 1 2010-07-01 2010-07-01 false Professional and technical services. 82.205 Section 82.205 Education Office of the Secretary, Department of Education NEW RESTRICTIONS ON LOBBYING Activities... providing an engineering analysis prior to the preparation or submission of a bid or proposal are not...

Incorporating Non-Relevance Information in the Estimation of Query Models

DTIC Science & Technology

2008-11-01

experiments in relevance feedback. In Salton , G., editor, The SMART Retrieval System – Exper- iments in Automatic Document Processing, pages 337– 354...W. (2001). Relevance based lan- guage models. In SIGIR ’01. Rocchio, J. (1971). Relevance feedback in information re- trieval. In Salton , G., editor

78 FR 49749 - Trailblazer Pipeline Company LLC; Notice of Technical Conference

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-15

... technical, engineering, and operational support for its proposed gas quality specifications. Consistent with... Rehabilitation Act of 1973. For accessibility accommodations please send an email to [email protected] or...

76 FR 54510 - Notice of Availability of Proposed Models for Plant-Specific Adoption of Technical Specifications...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-01

... Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler TSTF-500, Revision 2... Specifications Task Force (TSTF) Traveler TSTF- 500, Revision 2, ``DC Electrical Rewrite--Update to TSTF-360....8.6, ``Battery Cell Parameters.'' Additionally, a new Administrative Controls program, titled...

77 FR 16869 - Proposed Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler TSTF...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-22

... Ventilation System Surveillance Requirements to Operate for 10 hours per Month.'' DATES: Comment period....1, which currently require operating the heaters in the respective systems for at least 10... Adoption of Technical Specifications Task Force Traveler TSTF-522, Revision 0, ``Revise Ventilation System...

An SNMP-based solution to enable remote ISO/IEEE 11073 technical management.

PubMed

Lasierra, Nelia; Alesanco, Alvaro; García, José

2012-07-01

This paper presents the design and implementation of an architecture based on the integration of simple network management protocol version 3 (SNMPv3) and the standard ISO/IEEE 11073 (X73) to manage technical information in home-based telemonitoring scenarios. This architecture includes the development of an SNMPv3-proxyX73 agent which comprises a management information base (MIB) module adapted to X73. In the proposed scenario, medical devices (MDs) send information to a concentrator device [designated as compute engine (CE)] using the X73 standard. This information together with extra information collected in the CE is stored in the developed MIB. Finally, the information collected is available for remote access via SNMP connection. Moreover, alarms and events can be configured by an external manager in order to provide warnings of irregularities in the MDs' technical performance evaluation. This proposed SNMPv3 agent provides a solution to integrate and unify technical device management in home-based telemonitoring scenarios fully adapted to X73.

Managerial Cost Accounting for a Technical Information Center.

ERIC Educational Resources Information Center

Helmkamp, John G.

A two-fold solution to the cost information deficiency problem is proposed. A formal managerial cost accounting system is designed expressly for the two information services of retrospective search and selective dissemination. The system was employed during a trial period to test its effectiveness in a technical information center. Once…

Enabling the Interoperability of Large-Scale Legacy Systems

DTIC Science & Technology

2008-01-01

information retrieval systems ( Salton and McGill 1983). We use this method because, in the schema mapping task, only one instance per class is...2001). A survey of approaches to automatic schema matching. The VLDB Journal, 10, 334-350. Salton , G., & McGill, M.J. (1983). Introduction to

32 CFR 37.420 - Should I tell proposers that we will not disclose information that they submit?

Code of Federal Regulations, 2010 CFR

2010-07-01

... documents; and (ii) Business plans and technical information submitted on a confidential basis. (c) If proposers desire to protect business plans and technical information for five years from FOIA disclosure...

The Valuation of Scientific and Technical Experiments

NASA Technical Reports Server (NTRS)

Williams, F. E.

1972-01-01

Rational selection of scientific and technical experiments for space missions is studied. Particular emphasis is placed on the assessment of value or worth of an experiment. A specification procedure is outlined and discussed for the case of one decision maker. Experiments are viewed as multi-attributed entities, and a relevant set of attributes is proposed. Alternative methods of describing levels of the attributes are proposed and discussed. The reasonableness of certain simplifying assumptions such as preferential and utility independence is explored, and it is tentatively concluded that preferential independence applies and utility independence appears to be appropriate.

Earth Observations

NASA Image and Video Library

2013-06-21

ISS036-E-011034 (21 June 2013) --- The Salton Trough is featured in this image photographed by an Expedition 36 crew member on the International Space Station. The Imperial and Coachella Valleys of southern California – and the corresponding Mexicali Valley and Colorado River Delta in Mexico – are part of the Salton Trough, a large geologic structure known to geologists as a graben or rift valley that extends into the Gulf of California. The trough is a geologically complex zone formed by interaction of the San Andreas transform fault system that is, broadly speaking, moving southern California towards Alaska; and the northward motion of the Gulf of California segment of the East Pacific Rise that continues to widen the Gulf of California by sea-floor spreading. According to scientists, sediments deposited by the Colorado River have been filling the northern rift valley (the Salton Trough) for the past several million years, excluding the waters of the Gulf of California and providing a fertile environment – together with irrigation—for the development of extensive agriculture in the region (visible as green and yellow-brown fields at center). The Salton Sea, a favorite landmark of astronauts in low Earth orbit, was formed by an irrigation canal rupture in 1905, and today is sustained by agricultural runoff water. A wide array of varying landforms and land uses in the Salton Trough are visible from space. In addition to the agricultural fields and Salton Sea, easily visible metropolitan areas include Yuma, AZ (lower left); Mexicali, Baja California, Mexico (center); and the San Diego-Tijuana conurbation on the Pacific Coast (right). The approximately 72-kilometer-long Algodones Dunefield is visible at lower left.

75 FR 33761 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-15

... Section IV of the Virginia State Technical Guide AGENCY: Natural Resources Conservation Service (NRCS), U... Rosa Road, Suite 209, Richmond, Virginia 23229-5014; Telephone number (804) 287-1691; Fax number (804) 287-1737. Copies of the practice standards will be made available upon written request to the address...

Automated Sentiment Analysis

DTIC Science & Technology

2009-06-01

questions. Our prototype text classifier uses a “vector similarity” approach. This is a well-known technique introduced by Salton , Wong, and Yang (1975...Loveman & T.M. Davies Jr. (Eds.), Guerrilla warfare. Lincoln, NE: University of Nebraska Press, 1985, 47-69. Salton , G., Wong, A., & Yang, C.S. “A

Proposed Minor NSR Permit: Deseret Power Electric Cooperative - Bonanza Power Plant

EPA Pesticide Factsheets

Proposed minor NSR permit, technical support document, public notice bulletin, and supporting documentation for the Deseret Power Electric Cooperative Bonanza Power Plant, Uintah and Ouray Indian Reservation, Utah.

Predictors of employer satisfaction: technical and non-technical skills.

PubMed

Danielson, Jared A; Wu, Tsui-Feng; Fales-Williams, Amanda J; Kirk, Ryan A; Preast, Vanessa A

2012-01-01

Employers of 2007-2009 graduates from Iowa State University College of Veterinary Medicine were asked to respond to a survey regarding their overall satisfaction with their new employees as well as their new employees' preparation in several technical and non-technical skill areas. Seventy-five responses contained complete data and were used in the analysis. Four technical skill areas (data collection, data interpretation, planning, and taking action) and five non-technical skill areas (interpersonal skills, ability to deal with legal issues, business skills, making referrals, and problem solving) were identified. All of the skill area subscales listed above had appropriate reliability (Cronbach's alpha>0.70) and were positively and significantly correlated with overall employer satisfaction. Results of two simultaneous regression analyses indicated that of the four technical skill areas, taking action is the most salient predictor of employer satisfaction. Of the five non-technical skill areas, interpersonal skills, business skills, making referrals, and problem solving were the most important skills in predicting employer satisfaction. Hierarchical regression analysis revealed that all technical skills explained 25% of the variation in employer satisfaction; non-technical skills explained an additional 42% of the variation in employer satisfaction.

76 FR 50171 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-12

... the Virginia NRCS State Technical Guide for review and comment. SUMMARY: It has been determined by the... Management No Till/Strip Till/Direct Seed, 344, Residue Management, Seasonal, 345, Residue and Tillage... public review and comment. For the next 30 days, the NRCS in Virginia will receive comments relative to...

76 FR 52634 - Notice of Proposed Change to Section IV of the Virginia State Technical Guide

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-23

... NRCS State Technical Guide for review and comment. SUMMARY: It has been determined by the NRCS State... Management No Till/Strip Till/Direct Seed, 344, Residue Management, Seasonal, 345, Residue and Tillage... review and comment. For the next 30 days, the NRCS in Virginia will receive comments relative to the...

A Study on the Impact of Collective Feedback in the Online Technical and Professional Communication Classroom

ERIC Educational Resources Information Center

Singleton, Meredith

2016-01-01

This dissertation study seeks to determine whether feedback in the online Technical and Professional Communication classroom impacts student performance. This dissertation proposes that online Technical and Professional Communication instructors consider adopt such a feedback methodology in order to engage students with writing practices that…

Charles Morris's Semiotic Model and Analytical Studies of Visual and Verbal Representations in Technical Communication

ERIC Educational Resources Information Center

Fan, Jiang-Ping

2006-01-01

In this article, the author demonstrates that the semiotic model proposed by Charles Morris enables us to optimize our understanding of technical communication practices and provides a good point of inquiry. To illustrate this point, the author exemplifies the semiotic approaches by scholars in technical communication and elaborates Morris's model…

Promotion of the Equal Access of Girls and Women to Technical and Vocational Education. Studies on Technical and Vocational Education 7.

ERIC Educational Resources Information Center

United Nations Educational, Scientific, and Cultural Organization, Paris (France).

This monograph includes the final report of the International Expert Meeting on the Promotion of Equal Access of Girls and Women to Technical and Vocational Education (TVE) held in Seoul, Republic of Korea, and country discussion papers. The final report is composed of an introduction that proposes that many Member States require special measures…

Necessity of creating digital tools to ensure efficiency of technical means

NASA Astrophysics Data System (ADS)

Rakov, V. I.; Zakharova, O. V.

2018-05-01

The authors estimated the problems of functioning of technical objects. The article notes that the increasing complexity of automation systems may lead to an increase of the redundant resource in proportion to the number of components and relationships in the system, and to the need of the redundant resource constant change that can make implementation of traditional structures with redundancy unnecessarily costly (Standby System, Fault Tolerance, High Availability). It proposes the idea of creating digital tools to ensure efficiency of technical facilities.

Black River Technical College, Exploring America's Communities. Progress Report.

ERIC Educational Resources Information Center

Black River Vocational-Technical School, Pocahontas, AR.

In 1996, Arkansas's Black River Technical College (BRTC) participated in the American Association of Community Colleges' Exploring America's Communities project, which worked to strengthen the teaching and learning of American history, literature, and culture at U.S. community colleges. The proposed centerpiece of BRTC's program is called the…

Teaching the Grant Proposal as a Problem-Solving Strategy: A Rhetorical Approach.

ERIC Educational Resources Information Center

Smith, Herbert J.

Technical communications courses, which frequently present the research proposal as part of the report writing segment, rarely teach the grant proposal, even though it can provide the instructor with a vehicle for presenting such rhetorical strategies as audience analysis and persuasive writing. In addition to its problem solving structure, the…

76 FR 19766 - California Independent System Operator Corporation; Notice of Technical Conference

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-08

...) Capacity Procurement Mechanism (CPM) and exceptional dispatch mitigation provisions.\\1\\ Take notice that... (2011). The purpose of the technical conference is to discuss the issues raised by CAISO's proposed CPM...

Technical specifications for mechanical recycling of agricultural plastic waste.

PubMed

Briassoulis, D; Hiskakis, M; Babou, E

2013-06-01

Technical specifications appropriate for the recycling of agricultural plastic wastes (APWs), widely accepted by the recycling industry were developed. The specifications establish quality standards to be met by the agricultural plastics producers, users and the agricultural plastic waste management chain. They constitute the base for the best economical and environmental valorisation of the APW. The analysis of the APW streams conducted across Europe in the framework of the European project "LabelAgriWaste" revealed the inherent characteristics of the APW streams and the inherent constraints (technical or economical) of the APW. The APW stream properties related to its recycling potential and measured during pilot trials are presented and a subsequent universally accepted simplified and expanded list of APW recycling technical specifications is proposed and justified. The list includes two sets of specifications, applied to two different quality categories of recyclable APW: one for pellet production process ("Quality I") and another one for plastic profile production process ("Quality II"). Parameters that are taken into consideration in the specifications include the APW physical characteristics, contamination, composition and degradation. The proposed specifications are focused on polyethylene based APW that represents the vast majority of the APW stream. However, the specifications can be adjusted to cover also APW of different materials (e.g. PP or PVC) that are found in very small quantities in protected cultivations in Europe. The adoption of the proposed specifications could transform this waste stream into a labelled commodity traded freely in the market and will constitute the base for the best economical and environmental valorisation of the APW. Copyright © 2013 Elsevier Ltd. All rights reserved.

Technical Revisions to State Budgets and New Unit Set-Asides TSD

EPA Pesticide Factsheets

EPA proposed revising the Transport Rule's new unit set-asides (NUSAs) in certain states. This technical support document (TSD) shows underlying data and calculations and provides the information used to determine revised NUSAs in certain states.

Lunar mission safety and rescue: Technical summary

NASA Technical Reports Server (NTRS)

1971-01-01

A technical summary is presented of the escape/rescue and the hazards analyses for manned missions and operations in the 1980 time frame. Hazards are interpreted as hazards to man, not to equipment, program schedule, or program objectives. Hazards in 39 individual areas are analyzed, and corrective measures are recommended. Over 200 safety guidelines are proposed, based on significant hazards. Escape and rescue situtations and requirements are identified and analyzed, and escape/survival/rescue concepts are defined to cope with each escape/rescue situation. Areas in which research or technical development efforts could improve mission safety are identified. It is concluded that the primary emphasis should be on survival and escape provisions, with rescue required only where self-help cannot bring the endangered crewmen to a safe haven.

Organochlorines and selenium in California night-heron and egret eggs

USGS Publications Warehouse

Ohlendorf, Harry M.; Marois, Katherine C.

1990-01-01

Exceptionally high concentrations of DDE were found in black-crowned night-heron (Nycticorax nycticorax) (geometric mean 8.62 μg g−1 wet wt.) and great egret (Casmerodius albus) (24.0 μg g−1) eggs collected from the Imperial Valley (Salton Sea), California in 1985. DDE concentrations in 14 of the 87 (16%) randomly selected night-heron eggs from six colonies (two in San Francisco Bay, three in the San Joaquin Valley, and one at Salton Sea) were higher than those associated with reduced reproductive success of night-herons (8 μg g−1). In addition, mean shell thickness of night-heron eggs collected from the San Joaquin Valley and from San Francisco Bay during 1982–1984 was significantly less than pre-DDT thickness and was negatively correlated (r=−0.50, n=75, P<0.0001) with DDE concentration. Mean selenium concentration in night-heron eggs from Salton Sea (1.10 μg g−1) was significantly higher than in eggs from three locations in the San Joaquin Valley, and in egret eggs from Salton Sea.

48 CFR 1403.101-70 - Technical evaluators and advisors.

Code of Federal Regulations, 2010 CFR

2010-10-01

... GENERAL IMPROPER BUSINESS PRACTICES AND PERSONAL CONFLICTS OF INTEREST Safeguards 1403.101-70 Technical... a Conflict of Interest Certificate in a format approved by the HCA. If a potential COI exists, the appointee must not be allowed to evaluate or advise on an offeror's proposal until the conflict has been...

76 FR 79675 - Pomperaug Hydro Project Andrew Peklo III; Notice of Site Visit and Technical Meeting

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-22

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 12790-001] Pomperaug Hydro Project Andrew Peklo III; Notice of Site Visit and Technical Meeting On January 18, 2012, Office of Energy Projects staff will hold a site visit and technical meeting for the proposed Pomperaug Hydro Project (FERC...

FDA's proposed rules on patent listing requirements for new drug and 30-month stays on ANDA approval (proposed Oct. 24, 2002).

PubMed

Hui, Yuk Fung

2003-01-01

In order to close the loophole in the generic drug approval process that allows a brand name drug patent holder to delay or defeat generic drug application merely by technicality, the FDA recently proposed to modify its regulations. Those proposals affect the patent listing requirements of a new drug application, and the duration of time that a generic drug application could be put on hold in the event of a patent infringement suit. With the modified rules, the FDA expects to see an increase in the availability of generic drugs, which eventually will lead to lower drug costs. Ms. Hui discusses the contents of the proposed regulations and provides an analysis of the proposed rule's legal authority, implications on patent rights, and impact on the pharmaceutical industry.

FY 2016 Grant Announcement: FY 2016 Technical Analysis and Programmatic Evaluation Support to the Chesapeake Bay Program Partnership

EPA Pesticide Factsheets

The U.S. Environmental Protection Agency’s Chesapeake Bay Program Office is announcing a Request for Proposals for applicants to provide the Chesapeake Bay Program partners with a proposal(s) for providing technical analysis and programmatic evaluation

Bridging the Gap Between the Social and the Technical: The Enrolment of Socio-Technical Information Architects to Cope with the Two-Level Model of EPR Systems.

PubMed

Pedersen, Rune

2017-01-01

This is a project proposal derived from an urge to re-define the governance of ICT in healthcare towards regional and national standardization of the patient pathways. The focus is on a two-levelled approach for governing EPR systems where the clinicians' model structured variables and patient pathways. The overall goal is a patient centric EPR portfolio. This paper define and enlighten the need for establishing the socio- technical architect role necessary to obtain the capabilities of a modern structured EPR system. Clinicians are not capable to moderate between the technical and the clinical.

Technical Advisory Team (TAT) report on the rocket sled test accident of October 9, 2008.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Stofleth, Jerome H.; Dinallo, Michael Anthony; Medina, Anthony J.

2009-01-01

This report summarizes probable causes and contributing factors that led to a rocket motor initiating prematurely while employees were preparing instrumentation for an AIII rocket sled test at SNL/NM, resulting in a Type-B Accident. Originally prepared by the Technical Advisory Team that provided technical assistance to the NNSA's Accident Investigation Board, the report includes analyses of several proposed causes and concludes that the most probable source of power for premature initiation of the rocket motor was the independent battery contained in the HiCap recorder package. The report includes data, evidence, and proposed scenarios to substantiate the analyses.

76 FR 38200 - Notice of Submission of Proposed Information Collection to OMB; Public Housing Assessment System...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-29

... Proposed Information Collection to OMB; Public Housing Assessment System (PHAS) Appeals, Technical Reviews... Management and Budget (OMB) for review, as required by the Paperwork Reduction Act. The Department is... housing agencies (PHAs) may submit a request for a technical review, database adjustment or appeal. The...

Innovative methods of popularizing technical education

NASA Astrophysics Data System (ADS)

Shkitsa, L. Y.; Panchuk, V. G.; Kornuta, V. A.

2017-05-01

There have been analyzed reasons of the loss of technical education’s popularity. Also, the analysis of known educational and production methods, oriented at the innovative model of development of society, was performed. It is stated that the acquisition of 21st century’s skills as a result of competition of technical education are natural for the DIY ideology, which was realized in the institutions like Fab Lab. The new educational strategy, based on project-based learning, is proposed to be implemented as a special laboratory with equipment, which would be a center of innovative development for students at the Technical University. Moreover, the list of projects planned for implementation, that includes not only projects, specific to a particular university, but also projects, demanded by society as a whole, is specified. It is worth to implement trendy projects in the laboratory, such as toy-like, ecological projects; projects of the energy dependence decrease or the energy efficiency increase, modern digital or innovative projects etc. The student should gain knowledge, skills and, possibly, equipment that are available for immediate usage on the labor market or for the realization of his own projects or the community’s projects in everyday life after the realization of the particular project at the laboratory

Chang-Diaz's EMU lower torso (legs) suspended against an Earth view during STS-111 UF-2 EVA 2

NASA Image and Video Library

2002-06-12

STS111-E-5224 (12 June 2002) --- Southern California’s Salton Sea is routinely a prominent visual for astronauts passing overhead on the shuttle or International Space Station (ISS). This large lake, photographed from the station while docked to the Space Shuttle Endeavour by one of the STS-111 crew members, supports the rich agricultural fields of the Imperial, Coachella and Mexicali Valleys in the California and Mexico desert. According to geologists, the Salton Sea formed by accident in 1905 when an irrigation canal ruptured, allowing the Colorado River to flood the Salton Basin. Today the Sea performs an important function as the sink for agricultural runoff. Water levels are maintained by the runoff from the surrounding agricultural valleys. The Salton Sea salinity is high -- nearly 1/4 saltier than ocean water --but it remains an important stopover point for migratory water birds, including several endangered species. Scientists also noted that the region experiences several environmental problems. The recent increased demands for the limited Colorado River water, the scientists point out, threatens the amount of water allowed to flow into the Salton Sea, and increased salinity with decreased water levels could trigger several regional environmental crises. The agricultural flow into the Sea includes nutrients and agricultural by-products, increasing the productivity and likelihood of algae blooms. This image shows either a bloom, or suspended sediment (usually highly organic) in the water that has been stirred up by winds.

Technical-Oriented Enterprise Resource Planning (ERP) Body of Knowledge for Information Systems Programs: Content and Implementation

ERIC Educational Resources Information Center

Boyle, Todd A.

2007-01-01

In this article, the author proposes a body of knowledge that the educators can use to incorporate the technical aspects of enterprise resource planning (ERP) into an information systems (IS) program, encapsulated as the ERP technical knowledge framework. To illustrate the application of this framework, the author discusses a course sequence that…

Source properties of earthquakes near the Salton Sea triggered by the 16 October 1999 M 7.1 Hector Mine, California, earthquake

USGS Publications Warehouse

Hough, S.E.; Kanamori, H.

2002-01-01

We analyze the source properties of a sequence of triggered earthquakes that occurred near the Salton Sea in southern California in the immediate aftermath of the M 7.1 Hector Mine earthquake of 16 October 1999. The sequence produced a number of early events that were not initially located by the regional network, including two moderate earthquakes: the first within 30 sec of the P-wave arrival and a second approximately 10 minutes after the mainshock. We use available amplitude and waveform data from these events to estimate magnitudes to be approximately 4.7 and 4.4, respectively, and to obtain crude estimates of their locations. The sequence of small events following the initial M 4.7 earthquake is clustered and suggestive of a local aftershock sequence. Using both broadband TriNet data and analog data from the Southern California Seismic Network (SCSN), we also investigate the spectral characteristics of the M 4.4 event and other triggered earthquakes using empirical Green's function (EGF) analysis. We find that the source spectra of the events are consistent with expectations for tectonic (brittle shear failure) earthquakes, and infer stress drop values of 0.1 to 6 MPa for six M 2.1 to M 4.4 events. The estimated stress drop values are within the range observed for tectonic earthquakes elsewhere. They are relatively low compared to typically observed stress drop values, which is consistent with expectations for faulting in an extensional, high heat flow regime. The results therefore suggest that, at least in this case, triggered earthquakes are associated with a brittle shear failure mechanism. This further suggests that triggered earthquakes may tend to occur in geothermal-volcanic regions because shear failure occurs at, and can be triggered by, relatively low stresses in extensional regimes.

Preliminary draft industrial siting administration permit application: Socioeconomic factors technical report. Final technical report, November 1980-May 1982. [Proposed WyCoalGas project in Converse County, Wyoming

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

1982-01-01

Under the with-project scenario, WyCoalGas is projected to make a difference in the long-range future of Converse County. Because of the size of the proposed construction and operations work forces, the projected changes in employment, income, labor force, and population will alter Converse County's economic role in the region. Specifically, as growth occurs, Converse County will begin to satisfy a larger portion of its own higher-ordered demands, those that are currently being satisfied by the economy of Casper. Business-serving and household-serving activities, currently absent, will find the larger income and population base forecast to occur with the WyCoalGas project desirable.more » Converse County's economy will begin to mature, moving away from strict dependence on extractive industries to a more sophisticated structure that could eventually appeal to national, and certainly, regional markets. The technical demand of the WyCoalGas plant will mean a significant influx of varying occupations and skills. The creation of basic manufacturing, advanced trade and service sectors, and concomitant finance and transportation firms will make Converse County more economically autonomous. The county will also begin to serve market center functions for the smaller counties of eastern Wyoming that currently rely on Casper, Cheyenne or other distant market centers. The projected conditions expected to exist in the absence of the WyCoalGas project, the socioeconomic conditions that would accompany the project, and the differences between the two scenarios are considered. The analysis is keyed to the linkages between Converse County and Natrona County.« less

Hubble Space Telescope cycle 5 call for proposals

NASA Technical Reports Server (NTRS)

Bond, Howard E. (Editor)

1994-01-01

This document invites and supports participation by the international astronomical community in the HST General Observer and Archival Research programs. These documents contain the basic procedural and technical information required for HST proposal preparation and submission, including applicable deadlines. The telescope and its instruments were built under the auspices of the NASA and the European Space Agency.

Transforming South-South technical support to fight noncommunicable diseases.

PubMed

Shakow, Aaron D A; Bukhman, Gene; Adebona, Olumuyiwa; Greene, Jeremy; de Dieu Ngirabega, Jean; Binagwaho, Agnès

2012-03-01

At the UN High-Level Meeting on non-communicable diseases (NCD) in September 2011, each member state was challenged to create a multisectoral national policy and plan for the prevention and control of non-communicable disease by 2013. Few low-income countries, however, currently have such plans. Their governments are likely to turn for assistance in drafting and implementation to multilateral agencies and Contract Technical Support Organizations recommended by development partners. Yet because many NCD seen in the lowest-income countries differ significantly from those prevalent elsewhere, existing providers of external technical support may lack the necessary experience to support strategic planning for NCD interventions in these settings. This article reviews currently available mechanisms of technical support for health sector planning. It places them in the broader historical context of post- World War II international development assistance and the more recent campaigns for horizontal "South-South" cooperation and aid effectiveness. It proposes bilateral technical assistance by low income-countries themselves as the natural evolution of development assistance in health. Such programs, it argues, may be able to improve the quality of technical support to low-income countries for strategic planning in the NCD area while directing resources to the regions where they are most needed. Copyright © 2012 World Heart Federation (Geneva). Published by Elsevier B.V. All rights reserved.

Multiple paths to encephalization and technical civilizations.

PubMed

Schwartzman, David; Middendorf, George

2011-12-01

We propose consideration of at least two possible evolutionary paths for the emergence of intelligent life with the potential for technical civilization. The first is the path via encephalization of homeothermic animals; the second is the path to swarm intelligence of so-called superorganisms, in particular the social insects. The path to each appears to be facilitated by environmental change: homeothermic animals by decreased climatic temperature and for swarm intelligence by increased oxygen levels.

Relationship between intraoperative non-technical performance and technical events in bariatric surgery.

PubMed

Fecso, A B; Kuzulugil, S S; Babaoglu, C; Bener, A B; Grantcharov, T P

2018-03-30

The operating theatre is a unique environment with complex team interactions, where technical and non-technical performance affect patient outcomes. The correlation between technical and non-technical performance, however, remains underinvestigated. The purpose of this study was to explore these interactions in the operating theatre. A prospective single-centre observational study was conducted at a tertiary academic medical centre. One surgeon and three fellows participated as main operators. All patients who underwent a laparoscopic Roux-en-Y gastric bypass and had the procedures captured using the Operating Room Black Box ® platform were included. Technical assessment was performed using the Objective Structured Assessment of Technical Skills and Generic Error Rating Tool instruments. For non-technical assessment, the Non-Technical Skills for Surgeons (NOTSS) and Scrub Practitioners' List of Intraoperative Non-Technical Skills (SPLINTS) tools were used. Spearman rank-order correlation and N-gram statistics were conducted. Fifty-six patients were included in the study and 90 procedural steps (gastrojejunostomy and jejunojejunostomy) were analysed. There was a moderate to strong correlation between technical adverse events (r s  = 0·417-0·687), rectifications (r s  = 0·380-0·768) and non-technical performance of the surgical and nursing teams (NOTSS and SPLINTS). N-gram statistics showed that after technical errors, events and prior rectifications, the staff surgeon and the scrub nurse exhibited the most positive non-technical behaviours, irrespective of operator (staff surgeon or fellow). This study demonstrated that technical and non-technical performances are related, on both an individual and a team level. Valuable data can be obtained around intraoperative errors, events and rectifications. © 2018 BJS Society Ltd Published by John Wiley & Sons Ltd.

78 FR 3893 - Enbridge Energy, Limited Partnership; Notice of Technical Conference

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-17

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. IS13-17-000] Enbridge Energy... Energy, Limited Partnership's proposed revision to its downstream Nomination Verification Procedure. \\1\\ Enbridge Energy, Limited Partnership, 141 FERC ] 61,246 (2012). Take notice that a technical conference...

Triggered surface slips in the Salton Trough associated with the 1999 Hector Mine, California, earthquake

USGS Publications Warehouse

Rymer, M.J.; Boatwright, J.; Seekins, L.C.; Yule, J.D.; Liu, J.

2002-01-01

Surface fracturing occurred along the southern San Andreas, Superstition Hills, and Imperial faults in association with the 16 October 1999 (Mw 7.1) Hector Mine earthquake, making this at least the eighth time in the past 31 years that a regional earthquake has triggered slip along faults in the Salton Trough. Fractures associated with the event formed discontinuous breaks over a 39-km-long stretch of the San Andreas fault, from the Mecca Hills southeastward to Salt Creek and Durmid Hill, a distance from the epicenter of 107 to 139 km. Sense of slip was right lateral; only locally was there a minor (~1 mm) vertical component of slip. Dextral slip ranged from 1 to 13 mm. Maximum slip values in 1999 and earlier triggered slips are most common in the central Mecca Hills. Field evidence indicates a transient opening as the Hector Mine seismic waves passed the southern San Andreas fault. Comparison of nearby strong-motion records indicates several periods of relative opening with passage of the Hector Mine seismic wave-a similar process may have contributed to the field evidence of a transient opening. Slip on the Superstition Hills fault extended at least 9 km, at a distance from the Hector Mine epicenter of about 188 to 196 km. This length of slip is a minimum value, because we saw fresh surface breakage extending farther northwest than our measurement sites. Sense of slip was right lateral; locally there was a minor (~1 mm) vertical component of slip. Dextral slip ranged from 1 to 18 mm, with the largest amounts found distributed (or skewed) away from the Hector Mine earthquake source. Slip triggered on the Superstition Hills fault commonly is skewed away from the earthquake source, most notably in 1968, 1979, and 1999. Surface slip on the Imperial fault and within the Imperial Valley extended about 22 km, representing a distance from the Hector Mine epicenter of about 204 to 226 km. Sense of slip dominantly was right lateral; the right-lateral component of slip

75 FR 26749 - Public Utility District No.1 of Snohomish County, WA; Notice of Technical Conference for the...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-12

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 2157-188] Public Utility District No.1 of Snohomish County, WA; Notice of Technical Conference for the Jackson Hydroelectric Project.... Commission staff will hold a technical conference to discuss the proposed license articles submitted by the...

77 FR 9218 - Tribally Controlled Postsecondary Career and Technical Institutions Program; Proposed Waivers and...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-16

... application process while lacking critical information about the future of the program, and we do not think... Program; Proposed Waivers and Extension of the Project Period; CFDA Number 84.245A AGENCY: Office of... Institutions Program (TCPCTIP), the Secretary proposes to waive the regulations that generally limit project...

Merger of Science Agencies Proposed

NASA Astrophysics Data System (ADS)

1992-07-01

A bill proposing the establishment of a cabinet-level Department of Science, Space, Energy and Technology was introduced in the House of Representatives on July 1 by Robert Walker (R-Pa.), George Brown (D-Calif.), Ron Packard (R-Calif.), and Joe Kolter (D-Pa.). The department would be a conglomerate of existing civilian science and technology agencies, including NASA, the Environmental Protection Agency, the National Oceanic and Atmospheric Administration, the National Institute of Standards and Technology, the National Telecommunications and Information Administration, the National Technical Information Service, and research functions at the Department of Energy.

76 FR 64083 - Reliability Technical Conference; Notice of Technical Conference

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-17

... Technical Conference; Notice of Technical Conference Take notice that the Federal Energy Regulatory Commission will hold a Technical Conference on Tuesday, November 29, 2011, from 1 p.m. to 5 p.m. and... System. The conference will explore the progress made on the priorities for addressing risks to...

77 FR 48112 - Pipeline Safety: Administrative Procedures; Updates and Technical Corrections

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-13

...This Notice of Proposed Rulemaking updates the administrative civil penalty maximums for violation of the pipeline safety regulations to conform to current law, updates the informal hearing and adjudication process for pipeline enforcement matters to conform to current law, amends other administrative procedures used by PHMSA personnel, and makes other technical corrections and updates to certain administrative procedures. The proposed amendments do not impose any new operating, maintenance, or other substantive requirements on pipeline owners or operators.

7 CFR 3403.7 - Proposal format for phase I applications.

Code of Federal Regulations, 2011 CFR

2011-01-01

... economically disadvantaged small business concerns, or women-owned small business concerns. (2) Project Summary/Abstract. The technical abstract should include a brief description of the problem or opportunity, project... important aspects of the project. The project summary of successful proposals may be published by USDA and...