Science.gov

Sample records for reworks

  1. Reworked eolianites: Bahaman highstand anomalies

    SciTech Connect

    Ball, M.M. )

    1990-05-01

    Eolianites, presumably formed during the last sea level lowstand, rise more than 40 m above the present-day highstand. These carbonate dune are being reworked by wave action to form sediment bodies (highstand conglomerates) with settings, geometries, internal structures, compositions, and textures that may be similar to those of lowstand conglomerates. The setting of these reworked eolianites is the windward platform edge. The geometry is a belt parallel to the platform edge, that may thin both platformward and basinward. Internal structure should include some large-scale foresets with chaotic dip directions and some evidence of tilted and overturned beds. Composition consists of marine bioclastic carbonate sand in boulder to sand-size clasts. If remnants of the carbonate dunes are preserved in the geologic record, highstand conglomerates should be recognizable on the basis of their association with these eolianites. The original eolianites are confirmed to a belt on the windward margins of the carbonate platform up to 7 km wide. Their geometry consists of linear sand waves or ridges composed of spillover lobes. Internal structure predominantly includes large-scale foresets dipping toward the platform interior. Composition is indistinguishable from that of associated highstand conglomerates with the possible exception that the latter might contain some high-magnesium calcite or aragonite marine cement. Whole marine fossils are absent in the eolianites. Red-weathered zones are common on dune exposure surface. Solution brecciation and cave deposition further complicate the diagenetic history of the eolianites, their associated highstand conglomerates, and their lowstand conglomeratic facies.

  2. 7 CFR 29.2293 - Rework.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Rework. 29.2293 Section 29.2293 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS...

  3. 7 CFR 29.3542 - Rework.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Rework. 29.3542 Section 29.3542 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS TOBACCO INSPECTION Standards Official Standard...

  4. Column Grid Array Rework for High Reliability

    NASA Technical Reports Server (NTRS)

    Mehta, Atul C.; Bodie, Charles C.

    2008-01-01

    Due to requirements for reduced size and weight, use of grid array packages in space applications has become common place. To meet the requirement of high reliability and high number of I/Os, ceramic column grid array packages (CCGA) were selected for major electronic components used in next MARS Rover mission (specifically high density Field Programmable Gate Arrays). ABSTRACT The probability of removal and replacement of these devices on the actual flight printed wiring board assemblies is deemed to be very high because of last minute discoveries in final test which will dictate changes in the firmware. The questions and challenges presented to the manufacturing organizations engaged in the production of high reliability electronic assemblies are, Is the reliability of the PWBA adversely affected by rework (removal and replacement) of the CGA package? and How many times can we rework the same board without destroying a pad or degrading the lifetime of the assembly? To answer these questions, the most complex printed wiring board assembly used by the project was chosen to be used as the test vehicle, the PWB was modified to provide a daisy chain pattern, and a number of bare PWB s were acquired to this modified design. Non-functional 624 pin CGA packages with internal daisy chained matching the pattern on the PWB were procured. The combination of the modified PWB and the daisy chained packages enables continuity measurements of every soldered contact during subsequent testing and thermal cycling. Several test vehicles boards were assembled, reworked and then thermal cycled to assess the reliability of the solder joints and board material including pads and traces near the CGA. The details of rework process and results of thermal cycling are presented in this paper.

  5. 7 CFR 983.152 - Failed lots/rework procedure.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... product shall be reported to the committee. The reworked lot shall be sampled and tested for aflatoxin as... the lot has been reworked and tested, it fails the aflatoxin test for a second time, the lot may be shelled and the kernels reworked, sampled, and tested in the manner specified for an original lot...

  6. 7 CFR 983.152 - Failed lots/rework procedure.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... procedure for aflatoxin. If inshell rework is selected as a remedy to meet the aflatoxin regulations of this... product shall be reported to the committee. The reworked lot shall be sampled and tested for aflatoxin as... the lot has been reworked and tested, it fails the aflatoxin test for a second time, the lot may...

  7. Welding rework data acquisition and automation

    NASA Technical Reports Server (NTRS)

    Romine, Peter L.

    1996-01-01

    Aluminum-Lithium is a modern material that NASA MSFC is evaluating as an option for the aluminum alloys and other aerospace metals presently in use. The importance of aluminum-lithium is in it's superior weight to strength characteristics. However, aluminum-lithium has produced many challenges in regards to manufacturing and maintenance. The solution to these problems are vital to the future uses of the shuttle for delivering larger payloads into earth orbit and are equally important to future commercial applications of aluminum-lithium. The Metals Processes Branch at MSFC is conducting extensive tests on aluminum-lithium which includes the collection of large amounts of data. This report discusses the automation and data acquisition for two processes: the initial weld and the repair. The new approach reduces the time required to collect the data, increases the accuracy of the data, and eliminates several types of human errors during data collection and entry. The same material properties that enhance the weight to strength characteristics of aluminum-lithium contribute to the problems with cracks occurring during welding, especially during the repair/rework process. The repairs are required to remove flaws or defects discovered in the initial weld, either discovered by x-ray, visual inspection, or some other type of nondestructive evaluation. It has been observed that cracks typically appear as a result of or beyond the second repair. MSFC scientists have determined that residual mechanical stress introduced by the welding process is a primary cause of the cracking. Two obvious solutions are to either prevent or minimize the stress introduced during the welding process, or remove or reduce the stress after the welding process and MSFC is investigating both of these.

  8. 66. BUILDING NO. 554, REWORK POWDER GRINDING ROUSE, PULVERIZING, WATER ...

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

    66. BUILDING NO. 554, REWORK POWDER GRINDING ROUSE, PULVERIZING, WATER DRY HOUSE, LOOKING NORTH (DEMOLITION IN PROGRESS). - Picatinny Arsenal, 500 Area, Powder Factory & Power House, State Route 15 near I-80, Dover, Morris County, NJ

  9. 65. BUILDING NO. 554, REWORK POWDER GRINDING HOUSE, PULVERIZING, WATER ...

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

    65. BUILDING NO. 554, REWORK POWDER GRINDING HOUSE, PULVERIZING, WATER DRY HOUSE, LOOKING SOUTH AT NORTH SIDE (DEMOLITION IN PROGRESS) OF BUILDING ONCE USED FOR REWORK POWDER GRINDING AND PULVERIZING (SEE NJ-36-C-33 FOR DIAGRAM OF THIS RECLAMATION PROCESS). THIS BUILDING ALSO SERVED AS A WATER DRY HOUSE. - Picatinny Arsenal, 500 Area, Powder Factory & Power House, State Route 15 near I-80, Dover, Morris County, NJ

  10. Lacie phase 1 Classification and Mensuration Subsystem (CAMS) rework experiment

    NASA Technical Reports Server (NTRS)

    Chhikara, R. S.; Hsu, E. M.; Liszcz, C. J.

    1976-01-01

    An experiment was designed to test the ability of the Classification and Mensuration Subsystem rework operations to improve wheat proportion estimates for segments that had been processed previously. Sites selected for the experiment included three in Kansas and three in Texas, with the remaining five distributed in Montana and North and South Dakota. The acquisition dates were selected to be representative of imagery available in actual operations. No more than one acquisition per biophase were used, and biophases were determined by actual crop calendars. All sites were worked by each of four Analyst-Interpreter/Data Processing Analyst Teams who reviewed the initial processing of each segment and accepted or reworked it for an estimate of the proportion of small grains in the segment. Classification results, acquisitions and classification errors and performance results between CAMS regular and ITS rework are tabulated.

  11. The Automated Aircraft Rework System (AARS): A system integration approach

    NASA Technical Reports Server (NTRS)

    Benoit, Michael J.

    1994-01-01

    The Mercer Engineering Research Center (MERC), under contract to the United States Air Force (USAF) since 1989, has been actively involved in providing the Warner Robins Air Logistics Center (WR-ALC) with a robotic workcell designed to perform rework automated defastening and hole location/transfer operations on F-15 wings. This paper describes the activities required to develop and implement this workcell, known as the Automated Aircraft Rework System (AARS). AARS is scheduled to be completely installed and in operation at WR-ALC by September 1994.

  12. 7 CFR 983.52 - Failed lots/rework procedure.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    .... Each lot of substandard pistachios may be reworked to meet aflatoxin or quality requirements. The... reporting. If a lot fails to meet the aflatoxin and/or the quality requirements of this part, a failed lot.... This form must be completed and submitted to the committee each time a lot fails either aflatoxin...

  13. 7 CFR 983.52 - Failed lots/rework procedure.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    .... Each lot of substandard pistachios may be reworked to meet aflatoxin or quality requirements. The... reporting. If a lot fails to meet the aflatoxin and/or the quality requirements of this part, a failed lot.... This form must be completed and submitted to the committee each time a lot fails either aflatoxin...

  14. 164. GENERAL VIEW OF BUILDING 60 (AIR REWORK FACILITY) AND ...

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

    164. GENERAL VIEW OF BUILDING 60 (AIR REWORK FACILITY) AND ENVIRONS. ROBERT AND CO., ARCHITECT-ENGINEERS FOR BUILDING 60. DISTANT VIEW NORTH TOWARD BUILDING 60 FROM THE INTERSECTION OF QUONSET RD. AND 1ST AVE., AIRFIELD VISIBLE ON RIGHT. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  15. 225. BUILDING 60. (AIR REWORK FACILITY) 194041; ALTERED 194849. GIBBS ...

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

    225. BUILDING 60. (AIR REWORK FACILITY) 1940-41; ALTERED 1948-49. GIBBS AND HALL, ARCHITECTS (WORKING FROM PLANS BY ROBERT AND CO. FOR NAS JACKSONVILLE). GENERAL VIEW FROM WEST. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  16. 224. BUILDING 60. (AIR REWORK FACILITY) 194041; ALTERED 194849 GIBBS ...

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

    224. BUILDING 60. (AIR REWORK FACILITY) 1940-41; ALTERED 1948-49 GIBBS AND HALL, ARCHITECTS, WORKING FROM PLANS BY ROBERT AND CO. FOR NAS JACKSONVILLE; SOUTH END OF THE HANGAR WING. VIEW FROM SOUTHEAST. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  17. Reworking Exams To Teach Chemistry Content and Reinforce Student Learning

    NASA Astrophysics Data System (ADS)

    Risley, John M.

    2007-09-01

    One meaningful approach to demonstrate to students the value of reworking exams is to offer an incentive to do so. This paper describes the strategy and effects of offering partial credit to students who rework answers originally answered incorrectly on an exam. This has proved largely successful for the last 10 years in several classes at the collegiate level. In the grading scheme used, the average percentage of the regrade on the final course grade is approximately 2 3%. While the regrade makes little difference in the final course grade for the majority of students, students are very appreciative of the opportunity afforded them, and this often changes their perspective of the class and the morale to a more positive attitude. Teachers in high school and in other disciplines may benefit from this approach.

  18. Rework of flip chip bonded radiation pixel detectors

    NASA Astrophysics Data System (ADS)

    Vähänen, S.; Heikkinen, H.; Pohjonen, H.; Salonen, J.; Savolainen-Pulli, S.

    2008-06-01

    In this paper, some practical aspects of reworking flip chip hybridized pixel detectors are discussed. As flip chip technology has been advancing in terms of placement accuracy and reliability, large-area hybrid pixel detectors have been developed. The area requirements are usually fulfilled by placing several readout chips (ROCs) on single sensor chip. However, as the number of ROCs increases, the probability of failure in the hybridization process and the ROC operation also increases. Because high accuracy flip chip bonding takes time, a significant part of the price of a pixel detector comes from the flip chip assembly process itself. As large-area detector substrates are expensive, and many flip chip placements are required, the price of an assembled detector can become very high. In a typical case, there is just one bad ROC (out of several) on a faulty detector to be replaced. Considering the high price of pixel detectors and the fact that reworking faulty ROCs does not take much longer than the original placement, it is worthwhile to investigate the feasibility of a rework process.

  19. Accretion and reworking beneath the North China Craton

    NASA Astrophysics Data System (ADS)

    Zheng, J. P.; Griffin, W. L.; Ma, Q.; O'Reilly, S. Y.; Xiong, Q.; Tang, H. Y.; Zhao, J. H.; Yu, C. M.; Su, Y. P.

    2012-09-01

    How has the Earth's continental lithosphere evolved? Most of our knowledge is derived from surface exposures, but xenoliths carried in volcanic rocks can be an important source of information. The North China Craton (NCC) is one of the oldest in the world and Phanerozoic volcanic rocks with abundant xenoliths are widespread, making it an ideal area to study the formation and evolution of continents. New analyses of U-Pb ages and Hf isotopes in zircon were obtained for lower crustal xenoliths from four localities including the Paleozoic Yingxian lamproites, and the basalts of Pingquan (Paleocene), Hebi and Nushan (Neogene). Published ages and compositions of lower crustal and upper mantle xenoliths from the NCC are synthesized to constrain the accretion and reworking processes that have affected the deep lithosphere beneath the craton. The peridotite bodies within the Dabie-Sulu ultrahigh-pressure (UHP) belt, along the southern edge of the NCC, are compared with the xenolith peridotites to constrain early Mesozoic dynamics. The oldest components of the NCC may be ~ 4.0 Ga old. The craton experienced complex accretion and reworking processes in its deep lithosphere, accompanied by the formation (or aggregation) and differentiation of the ancient continental nucleus. The small size of the NCC, compared with many other cratons worldwide, made it more susceptible to the effects of marginal subduction and collision with surrounding blocks. The subcontinental lithosphere mantle (SCLM) was generally coupled with the lower crust through the Paleozoic, while decoupling occurred in late Mesozoic-Cenozoic time, except locally (such as the Neoarchen lower crust and SCLM in Hebi), suggesting strong interactions between the asthenosphere and the lithosphere (both upper mantle and lower crust) in Phanerozoic time. In the lower crust, the ancient components of the craton were re-worked in Paleoarchean (3.80-3.65 Ga) time. The craton also experienced two important accretionary

  20. Physical reworking by near-bottom flow alters the metazoan meiofauna of Fieberling Guyot (northeast Pacific)

    NASA Astrophysics Data System (ADS)

    Thistle, David; Levin, Lisa A.; Gooday, Andrew J.; Pfannkuche, Olaf; Lambshead, P. John D.

    1999-12-01

    Although much of the deep sea is physically tranquil, some regions experience near-bottom flows that rework the surficial sediment. During periods of physical reworking, animals in the reworked layer risk being suspended, which can have both positive and negative effects. Reworking can also change the sediment in ecologically important ways, so the fauna of reworked sites should differ from that of quiescent locations. We combined data from two reworked, bathyal sites on the summit of Fieberling Guyot (32°27.631'N, 127°49.489'W; 32°27.581'N, 127°47.839'W) and compared the results with those of more tranquil sites. We tested for differences in the following parameters, which seemed likely to be sensitive to the direct or indirect effects of reworking: (1) the vertical distribution of the meiofauna in the sea bed, (2) the relative abundance of surface-living harpacticoids, (3) the proportion of the fauna consisting of interstitial harpacticoids, (4) the ratio of harpacticoids to nematodes. We found that the vertical distributions of harpacticoid copepods, ostracods, and kinorhynchs were deeper on Fieberling. In addition, the relative abundance of surface-living harpacticoids was less, the proportion of interstitial harpacticoids was greater, and the ratio of harpacticoids to nematodes was greater on Fieberling. These differences between Fieberling and the comparison sites suggest that physical reworking affects deep-sea meiofauna and indicate the nature of some of the effects.

  1. In situ reworking /gardening/ of the lunar surface - Evidence from the Apollo cores

    NASA Technical Reports Server (NTRS)

    Morris, R. V.

    1978-01-01

    The in situ reworking (gardening) of the lunar surface by impacting projectiles creates an in situ reworking zone extending horizontally over the entire regolith surface and extending vertically from the surface to a depth which varies from place-to-place on the moon. On the basis of available evidence, the 'high-maturity' zones observed at the top of the lunar cores have resulted from the in situ reworking of the present-day lunar surface. The temporal variation of the in situ reworking depth was investigated using depths inferred from maturity I sub s/FeO and Al-26 profiles of Apollo cores. The observed temporal variation of the in situ reworking depth in units of centimeters is equal to 2.2 times the time (in units of million years) to the 0.45th power.

  2. Rework of the ERA software system: ERA-8

    NASA Astrophysics Data System (ADS)

    Pavlov, D.; Skripnichenko, V.

    2015-08-01

    The software system that has been powering many products of the IAA during decades has undergone a major rework. ERA has capabilities for: processing tables of observations of different kinds, fitting parameters to observations, integrating equations of motion of the Solar system bodies. ERA comprises a domain-specific language called SLON, tailored for astronomical tasks. SLON provides a convenient syntax for reductions of observations, choosing of IAU standards to use, applying rules for filtering observations or selecting parameters for fitting. Also, ERA includes a table editor and a graph plotter. ERA-8 has a number of improvements over previous versions such as: integration of the Solar system and TT xA1 TDB with arbitrary number of asteroids; option to use different ephemeris (including DE and INPOP); integrator with 80-bit floating point. The code of ERA-8 has been completely rewritten from Pascal to C (for numerical computations) and Racket (for running SLON programs and managing data). ERA-8 is portable across major operating systems. The format of tables in ERA-8 is based on SQLite. The SPICE format has been chosen as the main format for ephemeris in ERA-8.

  3. Sediment reworking rates in deep sediments of the Mediterranean Sea.

    PubMed

    Barsanti, M; Delbono, I; Schirone, A; Langone, L; Miserocchi, S; Salvi, S; Delfanti, R

    2011-07-01

    Different pelagic areas of the Mediterranean Sea have been investigated in order to quantify physical and biological mixing processes in deep sea sediments. Herein, results of eleven sediment cores sampled at different deep areas (> 2000 m) of the Western and Eastern Mediterranean Sea are presented. ²¹⁰Pb(xs) and ¹³⁷Cs vertical profiles, together with ¹⁴C dating, are used to identify the main processes characterising the different areas and, finally, controlling mixing depths (SML) and bioturbation coefficients (D(b)). Radionuclide vertical profiles and inventories indicate that bioturbation processes are the dominant processes responsible for sediment reworking in deep sea environments. Results show significant differences in sediment mixing depths and bioturbation coefficients among areas of the Mediterranean Sea characterised by different trophic regimes. In particular, in the Oran Rise area, where the Almeria-Oran Front induces frequent phytoplankton blooms, we calculate the highest values of sediment mixing layers (13 cm) and bioturbation coefficients (0.187 cm² yr⁻¹), and the highest values of ²¹⁰Pb(xs) and ¹³⁷Cs inventories. Intermediate values of SML and D(b) (~6 cm and ~0.040 cm² yr⁻¹, respectively) characterise the mesothrophic Algero-Balearic basin, while in the Southern Tyrrhenian Sea mixing parameters (SML of 3 cm and D(b) of 0.011 cm² yr⁻¹ are similar to those calculated for the oligotrophic Eastern Mediterranean (SML of 2 cm and D(b) of ~0.005 cm² yr⁻¹). PMID:21561644

  4. Trinity shoal: a reworked deltaic barrier on Louisiana continental shelf

    SciTech Connect

    Suter, J.R.; Penland, S.; Moslow, T.F.

    1985-02-01

    Abandonment and reworking of deltaic complexes of the Holocene Mississippi River have produced a series of sandy shoals on the muddy Louisiana continental shelf. Trinity shoal, one of these transgressive deposits, is located 30 km offshore of Atchafalaya Bay and the Point Au Fer-March Island shell reefs. Approximately 1000 km of high-resolution uniboom and 3.5 kHz subbottom-profile seismic data, taken in this area in 1983 and 1984, provide the data base for this study. Trinity shoal, associated with the abandoned Maringouin delta complex, is a lunate shore-parallel feature approximately 36 km long and 5-10 km wide. Relief on the shoal ranges from 2 to 3 m, and minimum water depths over the shoal vary from -5 to -2 m. The shoal sand body is from 5 to 7 m thick and is composed largely of parallel to low-angle clinoform reflectors. Several levels of buried fluvial channels, ranging in age from early Wisconsinian to Holocene, are associated with the shoal deposit. The occurrence of channel features within the shoal sand itself suggests the presence of tidal inlets, indicating a possible barrier-island origin for the shoal. The underlying deltaic sediments reach approximately 15 m in thickness and are made up of low-angle clinoform reflectors dipping to the southwest. Distributary, bay-fill, estuarine, and buried oyster-reef deposits can be recognized, making these similar to modern Atchafalaya delta deposits. Continued progradation of the Atchafalaya delta will probably result in burial of the Trinity shoal and Maringouin delta deposits by fine-grained sediments, giving these shoal deposits a high-preservation potential and creating an excellent stratigraphic trap.

  5. Model for reworked deltaic sands - Example from South Lake Arthur, Bayou Gentily, and Bayou Lery Fields

    SciTech Connect

    Saxena, R.S. )

    1990-09-01

    Reworked deltaic sands are beach-barrier sand bodies that are produced by the reworking of abandoned deltaic lobes. The facies association of these sand bodies makes them ideal reservoirs, and although abundant hydrocarbons are trapped in this type of sandstone, their genesis is seldom understood in the petroleum world. Criteria and models are developed for the recognition of reworked deltaic sand bodies from the subsurface by comparing a Holocene analog from the eastern periphery of the modern Mississippi delta with an ancient example from the Carboniferous of the northern Appalachian plateau. A simulated seismic model and several subsurface examples are presented.

  6. 30 CFR 256.70 - Extension of lease by drilling or well reworking operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... well reworking operations are approved by the Secretary according to the conditions set forth in 30 CFR..., AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE...

  7. Semi-Automated Diagnosis, Repair, and Rework of Spacecraft Electronics

    NASA Technical Reports Server (NTRS)

    Struk, Peter M.; Oeftering, Richard C.; Easton, John W.; Anderson, Eric E.

    2008-01-01

    capacity and skill demands from exceeding crew time and training limits, the CLEAR project is examining options provided by non-real time tele-operations, robotics, and a new generation of diagnostic equipment. This paper outlines a strategy to create an effective repair environment where, with the support of ground based engineers, crewmembers can diagnose, repair and test flight electronics in-situ. This paper also discusses the implications of successful tele-robotic repairs when expanded to rework and reconfiguration of used flight assets for building Constellation infrastructure elements.

  8. Hydraulic Response of Colorado River Rapids to a Reworking Flood

    NASA Astrophysics Data System (ADS)

    Magirl, C. S.; Webb, R. H.

    2005-12-01

    Rapids on the Colorado River in Grand Canyon are formed primarily by the accumulation of coarse sediment from tributaries. Frequent debris-flow events in these tributaries contribute alluvium that constricts the river, accelerates local fluid velocities, increases the water-surface fall through the rapids, and raises the water-surface elevation in the upper pool. In turn, large main-stem floods rework fresh debris-fan deposits by removing the smaller coarse sediment and repositioning the largest particles into a stable matrix on the bed of the rapid. While morphologic changes to debris-fan surfaces in response to main-stem floods are widely studied in Grand Canyon, relatively little is known of the specific changes to the hydraulics of a given rapid. The turbulent and dangerous nature of rapids makes in-situ measurements challenging. The current study, however, successfully measured hydraulics within the core of several rapids. These rapids had been steepened by debris-flow event within the previous seven years. Using a boat-mounted fathometer and acoustic doppler velocimeter (ADV), point measurements of water-surface elevation, bathymetry, three-dimensional velocity, and turbulence were made at a collection of moderately-sized rapids in Grand Canyon. The boat was a 19-foot J-snout with a 50-hp Mercury outboard motor capable of maneuvering to nearly any location within each rapid. A three-person crew onboard operated the instrumentation. Two crewmembers on shore operated a survey instrument to continually record the boat position on the river. To characterize hydraulic changes in response to a main-stem flood, repeat measurements were made at each site both before and after the 1,200 m3/s controlled flood of November 2004. While this exercise is only a first step in quantifying the fluid dynamics within a rapid, the hydraulic data collected offers a unique insight into the response of coarse-grained alluvial deposits to floods in fast-moving bedrock

  9. Life testing of reflowed and reworked advanced CCGA surface mount packages in harsh thermal environments

    NASA Astrophysics Data System (ADS)

    Ramesham, Rajeshuni

    2013-03-01

    Life testing/qualification of reflowed (1st reflow) and reworked (1st reflow, 1st removal, and then 1st rework) advanced ceramic column grid array (CCGA) surface mount interconnect electronic packaging technologies for future flight projects has been studied to enhance the mission assurance of JPL-NASA projects. The reliability of reworked/reflowed surface mount technology (SMT) packages is very important for short-duration and long-duration deep space harsh extreme thermal environmental missions. The life testing of CCGA electronic packages under extreme thermal environments (for example: -185°C to +125°C) has been performed with reference to various JPL/NASA project requirements which encompass the temperature range studied. The test boards of reflowed and reworked CCGA packages (717 Xilinx package, 624, 1152, and 1272 column Actel Packages) were selected for the study to survive three times the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations, and mission phases or cycles to failure to assess the life of the hardware. Qualification/life testing was performed by subjecting test boards to the environmental harsh temperature extremes and assessing any structural failures, mechanical failures or degradation in electrical performance solder-joint failures due to either overstress or thermal cycle fatigue. The large, high density, high input/output (I/O) electronic interconnect SMT packages such as CCGA have increased usage in avionics hardware of NASA projects during the last two decades. The test boards built with CCGA packages are expensive and often require a rework to replace a reflowed, reprogrammed, failed, redesigned, etc., CCGA packages. Theoretically speaking, a good rework process should have similar temperature-time profile as that used for the original manufacturing process of solder reflow. A

  10. Reworking of Cretaceous dinosaurs into Paleocene channel deposits, upper Hell Creek Formation, Montana

    SciTech Connect

    Lofgren, D.L. ); Hotton, C.L. ); Runkel, A.C. )

    1990-09-01

    Dinosaur teeth from Paleocene channel fills have been interpreted as indicating dinosaur survival into the Paleocene. However, enormous potential for reworking exists because these records are restricted to large channel fills that are deeply incised into Cretaceous strata. Identification of reworked fossils is usually equivocal. This problem is illustrated by the Black Spring Coulee channel fill, a dinosaur-bearing Paleocene deposit in the upper Hell Creek Formation of eastern Montana. In this example, the reworked nature of well-preserved dinosaur bones is apparent only after detailed sedimentological and palynological analysis. Because of the potential for reworking, dinosaur remains derived from Paleocene fluvial deposits should not be assigned a Paleocene age unless the (1) are found in floodplain deposits, (2) are articulated, (3) are in channels that do not incise Cretaceous strata, or (4) are demonstrably reworked from Paleocene deposits. To date, reports of Paleocene dinosaurs do not fulfill any of these criteria. Thus, the proposal that dinosaurs persisted into the Paleocene remains unsubstantiated.

  11. Debris flow deposition and reworking by the Colorado River in Grand Canyon, Arizona

    NASA Astrophysics Data System (ADS)

    Yanites, Brian J.; Webb, Robert H.; Griffiths, Peter G.; Magirl, Christopher S.

    2006-11-01

    Flow regulation by large dams affects downstream flow competence and channel maintenance. Debris flows from 740 tributaries in Grand Canyon, Arizona, transport coarse-grained sediment onto debris fans adjacent to the Colorado River. These debris fans constrict the river to form rapids and are reworked during river flows that entrain particles and transport them downstream. Beginning in 1963, flood control operations of Glen Canyon Dam limited the potential for reworking of aggraded debris fans. We analyzed change in debris fans at the mouths of 75-Mile and Monument Creeks using photogrammetry of aerial photography taken from 1965 to 2000 and supplemented with ground surveys performed from 1987 to 2005. Our results quantify the debris fan aggradation that resulted from debris flows from 1984 to 2003. Volume, area, and river constriction increased at both debris fans. Profiles of the two debris fans show that net aggradation occurred in the middle of debris fans at stages above maximum dam releases, and surface shape shifted from concave to convex. Dam releases above power plant capacity partially reworked both debris fans, although reworking removed much less sediment than what was added by debris flow deposition. Large dam releases would be required to create additional reworking to limit the rate of debris fan aggradation in Grand Canyon.

  12. Production inventory policies for defective items with inspection errors, sales return, imperfect rework process and backorders

    NASA Astrophysics Data System (ADS)

    Jaggi, Chandra K.; Khanna, Aditi; Kishore, Aakanksha

    2016-03-01

    In order to sustain the challenges of maintaining good quality and perfect screening process, rework process becomes a rescue to compensate for the imperfections present in the production system. The proposed model attempts to explore the existing real-life situation with a more practical approach by incorporating the concept of imperfect rework as this occurs as an unavoidable problem to the firm due to irreparable disorders even in the reworked items. Hence, a production inventory model is formulated here to study the combined effect of imperfect quality items, faulty inspection process and imperfect rework process on the optimal production quantity and optimal backorder level. An analytical method is employed to maximize the expected total profit per unit time. Moreover, the results of several previous research articles namely Chiu et al (2006), Chiu et al (2005), Salameh and Hayek (2001), and classical EPQ with shortages are deduced as special cases. To demonstrate the applicability of the model, and to observe the effects of key parameters on the optimal replenishment policy, a numerical example along with a comprehensive sensitivity analysis has been presented. The pertinence of the model can be found in most of the manufacturing industries like textile, electronics, furniture, footwear, plastics etc. A production lot size model has been explored for defectives items with inspection errors and an imperfect rework process.

  13. Reworking of Cretaceous dinosaurs into Paleocene channel, deposits, upper Hell Creek Formation, Montana

    NASA Astrophysics Data System (ADS)

    Lofgren, Donald L.; Hotton, Carol L.; Runkel, Anthony C.

    1990-09-01

    Dinosaur teeth from Paleocene channel fills have been interpreted as indicating dinosaur survival into the Paleocene. However, enormous potential for reworking exists because these records are restricted to large channel fills that are deeply incised into Cretaceous strata. Identification of reworked fossils is usually equivocal. This problem is illustrated by the Black Spring Coulee channel fill, a dinosaur-bearing Paleocene deposit in the upper Hell Creek Formation of eastern Montana. In this example, the reworked nature of well-preserved dinosaur bones is apparent only after detailed sedimentological and palynological analysis. Because of the potential for reworking, dinosaur remains derived from Paleocene fluvial deposits should not be assigned a Paleocene age unless they (1) are found in floodplain deposits, (2) are articulated, (3) are in channels that do not incise Cretaceous strata, or (4) are demonstrably reworked from Paleocene deposits. To date, reports of "Paleocene" dinosaurs do not fulfill any of these criteria. Thus, the proposal that dinosaurs persisted into the Paleocene remains unsubstantiated.

  14. Debris flow deposition and reworking by the Colorado River in Grand Canyon, Arizona

    USGS Publications Warehouse

    Yanites, B.J.; Webb, R.H.; Griffiths, P.G.; Magirl, C.S.

    2006-01-01

    Flow regulation by large dams affects downstream flow competence and channel maintenance. Debris flows from 740 tributaries in Grand Canyon, Arizona, transport coarse-grained sediment onto debris fans adjacent to the Colorado River. These debris fans constrict the river to form rapids and are reworked during river flows that entrain particles and transport them downstream. Beginning in 1963, flood control operations of Glen Canyon Dam limited the potential for reworking of aggraded debris fans. We analyzed change in debris fans at the mouths of 75-Mile and Monument Creeks using photogrammetry of aerial photography taken from 1965 to 2000 and supplemented with ground surveys performed from 1987 to 2005. Our results quantify the debris fan aggradation that resulted from debris flows from 1984 to 2003. Volume, area, and river constriction increased at both debris fans. Profiles of the two debris fans show that net aggradation occurred in the middle of debris fans at stages above maximum dam releases, and surface shape shifted from concave to convex. Dam releases above power plant capacity partially reworked both debris fans, although reworking removed much less sediment than what was added by debris flow deposition. Large dam releases would be required to create additional reworking to limit the rate of debris fan aggradation in Grand Canyon.

  15. Characterizing and Modeling the Cost of Rework in a Library of Reusable Software Components

    NASA Technical Reports Server (NTRS)

    Basili, Victor R.; Condon, Steven E.; ElEmam, Khaled; Hendrick, Robert B.; Melo, Walcelio

    1997-01-01

    In this paper we characterize and model the cost of rework in a Component Factory (CF) organization. A CF is responsible for developing and packaging reusable software components. Data was collected on corrective maintenance activities for the Generalized Support Software reuse asset library located at the Flight Dynamics Division of NASA's GSFC. We then constructed a predictive model of the cost of rework using the C4.5 system for generating a logical classification model. The predictor variables for the model are measures of internal software product attributes. The model demonstrates good prediction accuracy, and can be used by managers to allocate resources for corrective maintenance activities. Furthermore, we used the model to generate proscriptive coding guidelines to improve programming, practices so that the cost of rework can be reduced in the future. The general approach we have used is applicable to other environments.

  16. The optimal manufacturing batch size with rework under time-varying demand process for a finite time horizon

    NASA Astrophysics Data System (ADS)

    Musa, Sarah; Supadi, Siti Suzlin; Omar, Mohd

    2014-07-01

    Rework is one of the solutions to some of the main issues in reverse logistic and green supply chain as it reduces production cost and environmental problem. Many researchers focus on developing rework model, but to the knowledge of the author, none of them has developed a model for time-varying demand rate. In this paper, we extend previous works and develop multiple batch production system for time-varying demand rate with rework. In this model, the rework is done within the same production cycle.

  17. Evidence of reworked Cretaceous fossils and their bearing on the existence of Tertiary dinosaurs

    SciTech Connect

    Eaton, J.G. ); Kirkland, J.I. ); Doi, K. )

    1989-06-01

    The Paleocene Shotgun fauna of Wyoming includes marine sharks as well as mammals. It has been suggested that the sharks were introduced from the Cannonball Sea. It is more likely that these sharks were reworked from a Cretaceous rock sequence that included both marine and terrestrial deposits as there is a mixture of marine and freshwater taxa. These taxa have not been recorded elsewhere after the Cretaceous and are not known from the Cannonball Formation. Early Eocene localities at Raven Ridge, Utah, similarly contain teeth of Cretaceous marine and freshwater fish, dinosaurs, and Eocene mammals. The Cretaceous teeth are well preserved, variably abraded, and serve to cast doubts on criteria recently used to claim that dinosaur teeth recovered from the Paleocene of Montana are not reworked. Another Eocene locality in the San Juan Basin has produced an Eocene mammalian fauna with diverse Cretaceous marine sharks. Neither the nature of preservation nor the degree of abrasion could be used to distinguish reworked from contemporaneous material. The mixed environments represented by the fish taxa and recognition of the extensive pre-Tertiary extinction of both marine and freshwater fish were employed to recognize reworked specimens.

  18. SEDIMENT REWORKING AND TRANSPORT IN EASTERN LAKE SUPERIOR: IN SITU RARE EARTH ELEMENT TRACER STUDIES

    EPA Science Inventory

    A rare earth element (REE) tracer pellet was deployed at the floor of the Ile Parisienne basin of eastern Lake Superior to measure representative sediment reworking and transport processes in the benthic boundary layer of the prnfundal Great Lakes. Samarium oxide, a high neutron-...

  19. Reworked calcareous nannofossils as ocean dynamic tracers: The Guadiana shelf case study (SW Iberia)

    NASA Astrophysics Data System (ADS)

    Ferreira, J.; Cachão, M.; González, R.

    2008-08-01

    For most micropalaeontological studies the presence of reworked specimens is usually considered as a disturbing factor where palaeoenvironmental or biostratigraphic interpretations are to be made. However, reworking of microfossils such as calcareous nannofossils can be used as an additional parameter in routine micropalaeontological work, providing useful information on erosion-transport processes acting on silty-clay sized particles deriving from areas surrounding the sedimentary basin under study. Most of the reworked calcareous nannofossils found in the Guadiana estuary water column (September 2001), adjacent shelf surface sediments, and a slope section of the Gulf of Cadiz were mainly of Upper Cretaceous age (Campanian to Maastrichtian), being dominated by Biscutum spp., Cribrosphaerella ehrenbergii, Prediscosphaera cretacea and Watznaueria barnesae. Since there are no Upper Cretaceous outcrops in the Guadiana's hydrographic basin or southern Portugal, the source of this material must be located elsewhere. Matrix breccias from mud volcanoes discovered in deeper water southern Portuguese and western Moroccan margins of the Gulf of Cadiz during the TTR-10 cruise in July/August 2000, as well as silty-clay sediments from its slopes, revealed similar calcareous nannofossil assemblages as those found on the Algarve continental shelf and inside the Guadiana's estuary. This may indicate that most of the reworked nannofossils have their origin in deepwater areas of the Gulf of Cadiz. The good preservation of most of the reworked Cretaceous nannofossils suggest that, shortly after resuspension, swift transport occurred from the source area to the coastal region of the Guadiana's river mouth, implicating a northward change in the deep Mediterranean water direction within the Gulf of Cadiz, which reaches the upper southwest Iberia slope. The Mediterranean Outflow is, therefore, the major mechanism accountable for transporting Upper Cretaceous material to the southwest

  20. Model Specification for Rework of Aircraft Engine, Power Transmission, and Accessory/Auxiliary Ball and Roller Bearings

    NASA Technical Reports Server (NTRS)

    Zaretsky, Erwin V.; Branzai, Emanuel V.

    2007-01-01

    This document provides a model specification for the rework and/or repair of bearings used in aircraft engines, helicopter main power train transmissions, and auxiliary bearings determined to be critical by virtue of performance, function, or availability. The rolling-element bearings to be processed under the provisions of this model specification may be used bearings removed after service, unused bearings returned from the field, or certain rejected bearings returned for reinspection and salvage. In commercial and military aircraft application, it has been a practice that rolling-element bearings removed at maintenance or overhaul be reworked and returned to service. Depending on the extent of rework and based upon theoretical analysis, representative life factors (LF) for bearings subject to rework ranged from 0.87 to 0.99 the lives of new bearings. Based on bearing endurance data, 92 percent of the bearing sets that would be subject to rework would result in L(sub 10) lives equaling and/or exceeding that predicted for new bearings. The remaining 8 percent of the bearings have the potential to achieve the analytically predicted life of new bearings when one of the rings is replaced at rework. The potential savings from bearing rework varies from 53 to 82 percent of that of new bearings depending on the cost, size, and complexity of the bearing

  1. Macrofaunal reworking activities and hydrocarbon redistribution in an experimental sediment system

    NASA Astrophysics Data System (ADS)

    Caradec, S.; Grossi, V.; Hulth, S.; Stora, G.; Gilbert, F.

    2004-09-01

    The influence of macrofaunal reworking activities on the redistribution of particle associated hydrocarbon compounds (HC) was experimentally investigated. Two distinct hydrocarbon mixtures adsorbed on montmorillonite particles (< 4 μm diameter) were added to the surface and deeper (2.5 cm) sediment layers. For comparison, luminophores (100-160 μm diameter) were added in the two deposit layers. At the start of the experiment, four macrobenthic species (the bivalve Abra nitida, the polychaete Scalibregma inflatum, and the echinoderms Amphiura filiformis and Echinocardium cordatum) were added to the sediment surface. The macrofauna added rapidly transferred HC from the surface sediment down to ˜5 cm depth by both continuous (biodiffusion) and non-continuous (biotransport) transport. Hydrocarbon compounds initially added to the deeper sediment layer were only subject to biodiffusion-like transport. Apparent biodiffusion coefficients ( Db) quantified by using a 1-D model were between 0.5 and 8.4×10 -3 cm 2 d -1, and biotransport coefficients ( r) ranged from 2.0 to 27.6×10 -3 d -1. Thus, the four species studied did not have the same effect on particle redistribution and, consequently, on HC repartition in the sediments. E. cordatum was the most efficient reworker. The present study demonstrated the importance of particle size selectivity by benthic fauna, and verified that macrofaunal reworking activities may redeposit sediment from deeper sediment layers on the sediment surface. Both processes have obvious implications for rates and pathways during organic matter mineralisation in marine sediments.

  2. Coral-rubble ridges as dynamic coastal features - short-term reworking and weathering processes

    NASA Astrophysics Data System (ADS)

    Spiske, Michaela

    2016-02-01

    A coral-rubble ridge built by storm waves at Anegada (British Virgin Islands) underwent remarkable changes in shape and weathering in a 23-month period. The ridge is located along the island's north shore, in the lee of a fringing reef and a reef flat. This coarse-clast ridge showed two major changes between March 2013, when first examined, and February 2015, when revisited. First, a trench dug in 2013, and intentionally left open for further examination, was found almost completely infilled in 2015, and the ridge morphology was modified by slumping of clasts down the slope and by reworking attributable to minor storm waves. In size, composition and overall condition, most of the clasts that filled the trench resemble reworked clasts from the ridge itself; only a small portion had been newly brought ashore. Second, a dark gray patina formed on the whitish exteriors of the carbonate clasts that had been excavated in 2013. These biologically weathered, darkened clasts had become indistinguishable from clasts that had been at the ridge surface for a much longer time. The findings have two broader implications. First, coastal coarse-clast ridges respond not solely to major storms, but also to tropical storms or minor hurricanes. The modification and reworking of the ridge on Anegada most probably resulted from hurricane Gonzalo which was at category 1-2 as it passed about 60 km north of the island in October 2014. Second, staining of calcareous clasts by cyanobacteria in the supralittoral zone occurs within a few months. In this setting, the degree of darkening quickly saturates as a measure of exposure age.

  3. Benthic macrofauna and sediment reworking quantification in contrasted environments in the Thau Lagoon

    NASA Astrophysics Data System (ADS)

    Duport, E.; Gilbert, F.; Poggiale, J.-C.; Dedieu, K.; Rabouille, C.; Stora, G.

    2007-04-01

    As part of the Microbent-PNEC Program: "Biogeochemical processes at the water-sediment interface in eutrophicated environment", the aim of this work was to specifically investigate and quantify the relationships between macrobenthos and sediment reworking in the Thau Lagoon in order to provide information on the potential contaminant distribution and movements at the water-sediment interface. In order to achieve this, three cores were sampled at two stations (in the central part of the Thau Lagoon and near the shellfish farming zone) in the Thau Lagoon, in December 2001, April 2002, August 2002, January 2003 and May 2003. On the basis of quantification of macrobenthos and sediment reworking, evidence is provided of: (1) similar sediment mixing intensities for different species composition at the two stations; (2) the major role of functional bioturbation groups (e.g., biodiffusors and gallery-diffusors) modulated by seasonal variability on sediment mixing; (3) an increase of intensity in summer suggesting potentially different patterns of redistribution, bioaccumulation and chemical fate (e.g., speciation) of deposited contaminants.

  4. Remote Sensing of Debris Flow Deposition and Reworking by the Colorado River in Grand Canyon, Arizona

    NASA Astrophysics Data System (ADS)

    Yanites, B. J.; Webb, R. H.; Griffiths, P. G.; Magirl, C. S.

    2005-12-01

    Debris flows from 740 tributaries transport sediment ranging from clay to large (>3m) boulders into the Colorado River in Grand Canyon, Arizona. The resulting debris fans constrict the river to form rapids. Debris fans and rapids are in turn altered by the river, which entrains particles and transports them downstream. River regulation in Grand Canyon began with the closure of Glen Canyon Dam in 1963, and the geomorphic character of the debris fans has been adjusting to the change in flow regime ever since. Previous studies have suggested that the debris fans have and will continue to aggrade in response to reduced discharge on the Colorado River. In order to monitor and evaluate changes in debris fans, we created a time series of digital terrain models for two frequently aggraded debris fans (75-Mile Wash and Monument Creek) using ground surveys and photogrammetry acquired between 1984 and 2005. Two-dimensional photogrammetric analysis was extended to include years 1965 and 1973. Debris fan volume, surface area, and river constriction confirm that these two debris fans have recently aggraded owing to multiple debris flows that occurred from 1984 through 2003. Debris fan volumes increased at 75-Mile Wash by over 10,000 m3 and at Monument Creek by almost 8000 m3. Some of this aggradation is likely the effect of the preferential growth of small, non-resolvable plants and settling of sediments in topographical lows. Aggradation has also altered the geometry of the fans. Profiles of the surface models show maximum aggradation near the middle of the debris fan and a shift of surface morphology from a concave to a convex profile. Although small controlled-flood releases partially reworked both fans at the edges, reworking removed far less sediment than was added by debris-flow deposition. This is partly the result of the geography of debris-flow deposition, as material deposited in the middle of the fan can be reworked only by large floods that overtop the debris fans

  5. Mathematical modeling of a multi-product EMQ model with an enhanced end items issuing policy and failures in rework.

    PubMed

    Chiu, Yuan-Shyi Peter; Sung, Peng-Cheng; Chiu, Singa Wang; Chou, Chung-Li

    2015-01-01

    This study uses mathematical modeling to examine a multi-product economic manufacturing quantity (EMQ) model with an enhanced end items issuing policy and rework failures. We assume that a multi-product EMQ model randomly generates nonconforming items. All of the defective are reworked, but a certain portion fails and becomes scraps. When rework process ends and the entire lot of each product is quality assured, a cost reduction n + 1 end items issuing policy is used to transport finished items of each product. As a result, a closed-form optimal production cycle time is obtained. A numerical example demonstrates the practical usage of our result and confirms a significant savings in stock holding and overall production costs as compared to that of a prior work (Chiu et al. in J Sci Ind Res India, 72:435-440 2013) in the literature. PMID:26558182

  6. Viable School Improvement Requires a Developmental Strategy that Moves beyond the Skewed Wish List and Reworks Operational Infrastructure. A Center Brief

    ERIC Educational Resources Information Center

    Center for Mental Health in Schools at UCLA, 2011

    2011-01-01

    factors affecting learning and teaching and how the operational infrastructure is reworked to enable strategic and effective development of essential interventions. This is especially so for schools that…

  7. The connection between crustal reworking and petrological diversity in the deep crust: clues from migmatites

    NASA Astrophysics Data System (ADS)

    Carvalho, Bruna B.; Sawyer, Edward W.; de Assis Janasi, Valdecir

    2016-04-01

    The deep levels of the continental crust have been extensively reworked as result of crustal differentiation. Migmatites are widespread in these high-grade metamorphic terrains, and provide valuable information on how processes such as partial melting, segregation of the melt from the residue and subsequent chemical exchanges lead to the petrological diversity found in the deep crust. This study investigates processes that transformed a largely uniform, metagranodiorite protolith into a very complex migmatite that contains three varieties of diatexites (grey, schlieren and homogenous diatexites) and several types of leucosomes. The Kinawa Migmatite is part of the Archean TTG crust in the São Francisco Craton (Brazil), which has been reworked in a shear zone environment at upper amphibolite facies conditions (<730°C and 5-6 kbar); thus it may be typical of crustal reworking in the interior of old cratons [1]. Grey diatexites are residual rocks formed by the extraction of a water-fluxed melt created via the reaction Pl + Kfs + Qz + H2O = melt. Diversity within the grey diatexites arises from different degrees of melt segregation (maximum ~40% melt). Schlieren diatexites are very heterogeneous rocks in which residuum-rich domains alternate with leucocratic quartzo-feldspathic domains where melt accumulated. Homogeneous diatexites are coarse-grained leucocratic rocks and represent larger bodies of anatectic melt with minor amounts (<20%) of entrained residuum. Leucosomes display a wide range of compositions from tonalitic to alkali-feldspar granite. Leucosomes, homogeneous diatexites and the quartzo-feldspathic domains in the schlieren diatexites all show a sequence of microstructural stages from plagioclase-dominated to K-feldspar-dominated frameworks many of which show evidence for tectonic compaction. Thus, further segregation of melt from solids occurred during crystallization. Minor amphibolite dykes in the metagranodiorite did not melt. They occur as angular to

  8. An EMQ inventory model for defective products involving rework and sales team's initiatives-dependent demand

    NASA Astrophysics Data System (ADS)

    Priyan, S.; Uthayakumar, R.

    2015-07-01

    This paper investigates the issue of an economic manufacturing quantity model for defective products involving imperfect production processes and rework. We consider that the demand is sensitive to promotional efforts/sales teams' initiatives as well as the setup cost can be reduced through further investment. It also assumes that fixed quantity multiple installments of the finished batch are delivered to customers at a fixed interval of time. The long-run average cost function is derived and its convexity is proved via differential calculus. An effective iterative solution procedure is developed to achieve optimal replenishment lot-size, setup cost and the initiatives of sales teams so that the total cost of system is minimized. Numerical and sensitivity analyses are performed to evaluate the outcome of the proposed solution procedure presented in this research.

  9. Maximising profits for an EPQ model with unreliable machine and rework of random defective items

    NASA Astrophysics Data System (ADS)

    Pal, Brojeswar; Sankar Sana, Shib; Chaudhuri, Kripasindhu

    2013-03-01

    This article deals with an economic production quantity (EPQ) model in an imperfect production system. The production system may undergo in 'out-of-control' state from 'in-control' state, after a certain time that follows a probability density function. The density function varies with reliability of the machinery system that may be controlled by new technologies, investing more costs. The defective items produced in 'out-of-control' state are reworked at a cost just after the regular production time. Occurrence of the 'out-of-control' state during or after regular production-run time is analysed and also graphically illustrated separately. Finally, an expected profit function regarding the inventory cost, unit production cost and selling price is maximised analytically. Sensitivity analysis of the model with respect to key parameters of the system is carried out. Two numerical examples are considered to test the model and one of them is illustrated graphically.

  10. [Support for Adult ASD in Medical Rework Program: Mutual Communication Program and Psychodrama].

    PubMed

    Yokoyama, Motonori

    2015-01-01

    While carrying out the Medical Rework Program, we realized the necessity for a supplementary medical treatment program aimed at adult ASD. Consequently, we started the Mutual Communication Program, which consists of standard SST and the new element of psychodrama. As a result, 32 participants have returned to their workplace in the three-year period, and the rate of successfully continuing to work was 93.8% at the time of the investigation. Various psychological tests also indicated significant improvement. In this article, we present a case study, explain psychodrama techniques employed in the program, and discuss their usefulness. The results suggest that psychodrama is a very effective assistive technique when the characteristics of ASD are taken into consideration. PMID:26524848

  11. New residence times of the Holocene reworked shells on the west coast of Bohai Bay, China

    NASA Astrophysics Data System (ADS)

    Shang, Zhiwen; Wang, Fu; Li, Jianfen; Marshall, William A.; Chen, Yongsheng; Jiang, Xingyu; Tian, Lizhu; Wang, Hong

    2016-01-01

    Shelly cheniers and shell-rich beds found intercalated in near-shore marine muds and sandy sediments can be used to indicate the location of ancient shorelines, and help to estimate the height of sea level. However, dating the deposition of material within cheniers and shell-rich beds is not straightforward because much of this material is transported and re-worked, creating an unknown temporal off-set, i.e., the residence time, between the death of a shell and its subsequent entombment. To quantify the residence time during the Holocene on a section of the northern Chinese coastline a total 47 shelly subsamples were taken from 17 discrete layers identified on the west coast of Bohai Bay. This material was AMS 14C dated and the calibrated ages were systematically compared. The subsamples were categorized by type as articulated and disarticulated bivalves, gastropod shells, and undifferentiated shell-hash. It was found that within most individual layers the calibrated ages of the subsamples got younger relative to the amount of apparent post-mortem re-working the material had been subject to. For examples, the 14C ages of the bivalve samples trended younger in this order: shell-hash → split shells → articulated shells. We propose that the younger subsample age determined within an individual layer will be the closest to the actual depositional age of the material dated. Using this approach at four Holocene sites we find residence times which range from 100 to 1260 cal yrs, with two average values of 600 cal yrs for the original 14C dates older than 1 ka cal BP and 100 cal yrs for the original 14C dates younger than 1 ka cal BP, respectively. Using this semi-empirical estimation of the shell residence times we have refined the existing chronology of the Holocene chenier ridges on the west coast of Bohai Bay.

  12. Long- and shortterm sediment yield by fluvial reworking of proglacial slopes in the upper Kaunertal

    NASA Astrophysics Data System (ADS)

    Dusik, Jana-Marie; Heckmann, Tobias; Hilger, Ludwig; Haas, Florian; Becht, Michael

    2015-04-01

    Glacier retreat since the end of the Little Ice Age (LIA) has exposed, and is bound to expose, large quantities of glacial sediments to reworking by non-glacial processes such as slope wash, rill erosion, gullying and mass movements. According to the model of paraglacial response, proglacial areas experience a quick adaption with maximum rates of geomorphic activity and sediment flux shortly after deglaciation, followed by a period of slow stabilization. Our case study is situated in the Upper Kaunertal, Central Austrian Alps (64 km²), and forms part of the interdisciplinary research project PROSA (High-resolution measurement of morphodynamics in rapidly changing proglacial systems of the Alps). Using high-resolution surveying techniques such as airborne and terrestrial LiDAR and digital photogrammetry, we monitor surface changes effected by different geomorphic processes on steep moraines and drift-mantled slopes that have been deglaciated since the end of the LIA. Specifically, we investigate the combined effect of topography, hillslope-channel coupling and changing hydrometeorological conditions on sediment flux. Multitemporal airborne images dating back to 1953 are used to derive digital elevation models (DEMs) for long-term analysis of surface changes and the corresponding sediment transfer. Recent developments are measured by DEMs of Difference (DoD) based on multitemporal airborne (2006, July 2012, September 2012) and terrestrial (July 2010, September 2011, September 2012, September 2013, September 2014) LiDAR surveys. The analysis of more than 40 years of rainfall and runoff datat suggests that significant changes in these parameters have had an additional effect on the reworking of glacial sediment stores.

  13. Effect of physical sediments reworking on hydrocarbon degradation and bacterial community structure in marine coastal sediments.

    PubMed

    Duran, Robert; Bonin, Patricia; Jezequel, Ronan; Dubosc, Karine; Gassie, Claire; Terrisse, Fanny; Abella, Justine; Cagnon, Christine; Militon, Cecile; Michotey, Valérie; Gilbert, Franck; Cuny, Philippe; Cravo-Laureau, Cristiana

    2015-10-01

    The present study aimed to examine whether the physical reworking of sediments by harrowing would be suitable for favouring the hydrocarbon degradation in coastal marine sediments. Mudflat sediments were maintained in mesocosms under conditions as closer as possible to those prevailing in natural environments with tidal cycles. Sediments were contaminated with Ural blend crude oil, and in half of them, harrowing treatment was applied in order to mimic physical reworking of surface sediments. Hydrocarbon distribution within the sediment and its removal was followed during 286 days. The harrowing treatment allowed hydrocarbon compounds to penetrate the first 6 cm of the sediments, and biodegradation indexes (such as n-C18/phytane) indicated that biodegradation started 90 days before that observed in untreated control mesocosms. However, the harrowing treatment had a severe impact on benthic organisms reducing drastically the macrofaunal abundance and diversity. In the harrowing-treated mesocosms, the bacterial abundance, determined by 16S rRNA gene Q-PCR, was slightly increased; and terminal restriction fragment length polymorphism (T-RFLP) analyses of 16S rRNA genes showed distinct and specific bacterial community structure. Co-occurrence network and canonical correspondence analyses (CCA) based on T-RFLP data indicated the main correlations between bacterial operational taxonomic units (OTUs) as well as the associations between OTUs and hydrocarbon compound contents further supported by clustered correlation (ClusCor) analysis. The analyses highlighted the OTUs constituting the network structural bases involved in hydrocarbon degradation. Negative correlations indicated the possible shifts in bacterial communities that occurred during the ecological succession. PMID:25847440

  14. Geothermal energy development in the eastern United States geothermal space heating - Naval Air Rework Facility, Norfolk, Virginia

    NASA Astrophysics Data System (ADS)

    Hill, F. K.; Henderson, R. W.

    1980-06-01

    The technical and economic feasibility of using geothermal energy for space heating the Naval Air Rework Facility (NARF) electronic integration hangar was evaluated. The warm water output from a single well was used in several modes: to heat via a floor radiation system or via heat pumps, with and without a ground water reservoir to store heat in off hours.

  15. Reworked loess and Yellow River sediment as the main sources of the Chinese Loess Plateau

    NASA Astrophysics Data System (ADS)

    Licht, Alexis; Pullen, Alex; Kapp, Paul; Abell, jordan; Giesler, Dominique

    2016-04-01

    The Quaternary aeolian dust deposits of the Chinese Loess Plateau have been attributed to spring and winter monsoonal storms sweeping clastic material from the deserts of the Asian interior into central China. Recent U-Pb geochronological studies of aeolian zircons have emphasized the existence of two major wind pathways: from the north, throughout the Tengger, and Mu Us deserts during interglacials, and from the west, through the Qaidam Basin during glacials. Others have emphasized the importance of Yellow River supply in the Loess Plateau sediment budget. However, tracking dust source regions through U-Pb dating is particularly complex, given the paucity of data in many potential sources regions and the similar ages peak in the age probability distributions of western and Northern deserts in central China. Here, we present an extended dataset of U-Pb ages covering all the potential provenance areas for the aeolian dust in central Asia and including 2400 new ages from loess, paleosols, modern sand dunes and fluvial deposits. We then propose a new mixture modeling technique to statistically address the contribution of these different sources to the Loess Plateau sedimentary budget. Our contribution estimates indicate that aeolian supply is dominated (60-70 %) by reworking of Yellow River sediment. Moreover, evidence of Qaidam Basin sourced zircons (15-20 %) in both loess (glacial) and paleosols (interglacial) layers corroborates the existence of an erosive wind pathway from the west during glacials and implies that a substantial portion of the interglacial dust is recycled from older glacial loess. We propose that sediment reworking of Yellow River sediment and older loesses by wind homogenizes aeolian zircon populations on the Chinese Loess Plateau toward a glacial provenance due to higher dust accumulation rates during glacials. These findings indicate that the Loess Plateau has evolved as a more dynamic landform than previous thought where wind deflation

  16. Early Cretaceous extensional reworking of the Triassic HP-UHP metamorphic orogen in Eastern China

    NASA Astrophysics Data System (ADS)

    Lin, Wei; Ji, Wenbin; Faure, Michel; Wu, Lin; Li, Qiuli; Shi, Yonghong; Scharer, Urs; Wang, Fei; Wang, Qingchen

    2015-11-01

    Corresponding to the Early Mesozoic continental subduction between the North China Block (NCB) and the South China Block (SCB), the Tongbaishan-Hong'an-Dabieshan-Sulu massifs are famous for their HP-UHP metamorphism. More than 50% of the HP-UHP Orogenic Belt was significantly reworked by Early Cretaceous extensional tectonics. This Early Cretaceous event with a fast cooling period, at 130-120 Ma, superimposed on the Early Mesozoic HP-UHP orogenic belt and intensively changed the architecture of this orogen. Each individual segment documents different Early Cretaceous extensional structures, namely the central Tongbaishan domain is a metamorphic core complex (MCC) represented by an A-type non-cylindrical antiform; the central Dabieshan domain is a typical Cordilleran-type migmatite-cored MCC; the Southern Sulu UHP domain is a "wedge-shaped" structure exhumed by a simple detachment fault. These late stage extensional structures expose the previous HP-UHP orogenic belt as fragments along the NCB-SCB boundary. The geodynamic setting of this Early Cretaceous extensional tectonics along the HP-UHP orogen is a part of a 1000 km-scale crustal extension belt that is widespread in eastern Eurasia continent from Trans-Baikal to the central part of SCB. Convective erosion or delamination of the mantle lithosphere might be considered as a possible mechanism for mantle removal.

  17. Early Cretaceous extensional reworking of the Triassic HP-UHP metamorphic orogen in Eastern China

    NASA Astrophysics Data System (ADS)

    Lin, W.; Ji, W.; Faure, M.; Wu, L.; Li, Q. L.; Shi, Y.; Scharer, U.; Wang, F.; Wang, Q.

    2015-12-01

    Corresponding to the Early Mesozoic continental subduction between the North China Block (NCB) and the South China Block (SCB), the Tongbaishan-Hong'an-Dabieshan-Sulu massifs are famous for their HP-UHP metamorphism. More than 50% of the HP-UHP Orogenic Belt was significantly reworked by Early Cretaceous extensional tectonics. This Early Cretaceous event with a fast cooling period, at 130-120 Ma, superimposed on the Early Mesozoic HP-UHP orogenic belt and intensively changed the architecture of this orogen. Each individual segment documents different Early Cretaceous extensional structures, namely the central Tongbaishan domain is a metamorphic core complex (MCC) represented by an A-type non-cylindrical antiform; the central Dabieshan domain is a typical Cordilleran-type migmatite-cored MCC; the Southern Sulu UHP domain is a "wedge-shaped" structure exhumed by a simple detachment fault. These late stage extensional structures expose the previous HP-UHP orogenic belt as fragments along the NCB-SCB boundary. The geodynamic setting of this Early Cretaceous extensional tectonics along the HP-UHP orogen is a part of a 1000 km-scale crustal extension belt that is widespread in eastern Eurasia continent from Trans-Baikal to the central part of the South China Block. Convective erosion or delamination of the mantle lithosphere might be considered as a possible mechanism for mantle removal.

  18. Disturbance of benthic infauna by sediment-reworking activities of the lugworm Arenicola marina

    NASA Astrophysics Data System (ADS)

    Flach, E. C.

    The influence of the lugworm Arenicola marina on the abundance of other benthic species was studied in the westernmost part of the Wadden Sea. Small squares (1 m 2) within depopulated 144-m 2 plots were recolonized with various (naturally-occurring) lugworm densities (0-10-20-40-80 and 0-25-50-75-100 per m 2). These plots were sampled during the summer. Lugworms were found to have a strongly negative effect on the densities of C. volutator. At 0-density lugworms, the numbers of C. volutator were high. These were halved at 17 lugworms per m 2 ( i.e. the mean density on the tidal flats of the Dutch Wadden Sea), and were further reduced at higher lugworm densities ( e.g. 20% remained at 40 lugworms per m 2). Laboratory observations of Corophium behaviour in the presence of Arenicola suggest that sediment-reworking lugworms stimulate Corophium to emigrate. Effects of lugworms on other benthic species were also studied in the same way. Lugworms were found to have strongly negative effects on the juvenile densities of various worm and bivalve species ( Nereis diversicolor, Nephtys hombergii, Heteromastus filiformis, Scoloplos armiger, Pygospio elegans, Capitella capitata and Mya arenaria, Cerastoderma edule, Macoma balthica, Angulus tenuis, respectively).

  19. Problems associated with reworked teeth in electron spin resonance (ESR) dating

    NASA Astrophysics Data System (ADS)

    Blackwell, Bonnie A.

    A single radiation-sensitive ESR signal at g = 2.0018 occurs in well crystallized fossil tooth enamel, but not in modern teeth. In dating fossil teeth, the equivalent radiation dose (A Σ needed to produce the observed ESR signal is the integral, with respect to time, of the natural, environmental dose rate experienced by the tooth after its deposition. Regardless of the uranium (U) uptake history assumed, a reliable age estimate requires a good estimate for the external dose rate during the tooth's history. If teeth in a stratigraphic unit have been reworked from older units or are post-depositional intrusions, external dose rates measured in situ do not accurately reflect those experienced by the tooth. For teeth from a single unit, significant variations in the calculated ages, A Σs, enamel or dentine U concentrations all indicate mixed sample collections. Where enough subsamples can be collected from single teeth, isochron analyses negate the need for a separate external dose measurement, while calculating the sample age and the external dose rate experienced by the tooth. Failing that, modelling the sedimentary dose rates using time-averaged total external dose calculations becomes necessary. These principles are illustrated using teeth from the australopithecine sites Sterkfontein and Swartkrans, South Africa.

  20. Micro-trace fossils reveal pervasive reworking of Pliocene sapropels by low-oxygen-adapted benthic meiofauna

    NASA Astrophysics Data System (ADS)

    Löhr, S. C.; Kennedy, M. J.

    2015-03-01

    Animal burrowers leave an indelible signature on the sedimentary record in most marine environments, with the seeming exception of low-oxygen environments. In modern sedimentary settings, however, sub-millimetre-sized benthic animals (meiofauna) are adapted to low oxygen and even sulfidic conditions. Almost nothing is known about their impact on ancient marine sediments because they leave few recognizable traces. Here we show, in classic Pliocene-aged anoxic facies from the Mediterranean, the first reported trace fossil evidence of meiofaunal activity and its relation to changing oxygenation. A novel approach utilizing electron imaging of ion-polished samples shows that meiofauna pervasively reworked sediment under oxygen-depleted conditions that excluded macrofauna, fragmenting organic laminae and emplacing 15- to 70-μm-diameter faecal pellets without macroscopically influencing the fabric. The extent of reworking raises the question: how pervasively altered are other sediments presently assumed to lack animal influence and how far into the geological record does this influence extend?

  1. Evidence for large-scale reworking of Campanian sediments into the Upper Maastrichtian Peedee formation at Burches Ferry, South Carolina

    USGS Publications Warehouse

    Self-Trail J.M.; Christopher, R.A.; Prowell, D.C.

    2002-01-01

    A 44-ft-deep corehole (FLO-311) was drilled at Burches Ferry, Florence County, S.C., in order to document the lithologic and paleontologic characteristics of the boundary between the upper Campanian Donoho Creek Formation and the upper Maastrichtian Peedee Formation. Palynomorph and calcareous nannofossil data provide detailed age control for these sediments. Examination of calcareous nannofossil assemblages shows that sediments from the type locality of the Peedee Formation consist largely of reworked Campanian materials. Robust Campanian species such as Reinhardtites anthophorus, Reinhardtites levis, and Stoverius asymmetricus commonly are found reworked into the Maastrichtian Peedee Formation in its entirety. Therefore, identification of lower upper Maastrichtian sediments is based on the presence of background assemblages rather than on the more traditional marker species. The presence of species restricted to the latest Campanian at the Donoho Creek-Peedee contact in outcrop indicates that the entire sedimentary package represented by calcareous nannofossil Zones CC23 and CC24 has been removed.

  2. Barrier island evolution and reworking by inlet migration along the Mississippi-Alabama gulf coast

    SciTech Connect

    Rucker, J.B.; Snowden, J.O. )

    1990-09-01

    The five barrier islands along the Mississippi-Alabama coast are located 10 to 14 mi (16 to 23 km) offshore and separate Mississippi Sound from the Gulf of Mexico. The barrier islands in the chain are, from east to west: Dauphin Island, Petit Bois Island, Horn Island, Ship Island, and Cat Island. The islands are low sand bodies situated on a relatively broad Holocene sand platform that extends 70 mi (113 km) from Dauphin Island on the east to Cat Island on the west. The platform varies in thickness from 25 to 75 ft (7.6 to 23 m) and rests on Holocene marine clays or on Pleistocene sediments. The barrier island chain predates the St. Bernard lobe of the Mississippi delta complex, which began to prograde about 3,000 years ago, and continued until it was abandoned approximately 1,500 years ago. In contrast to the other islands, Cat Island at the western down-drift end of the Mississippi-Alabama barrier island chain is characterized by more than 12 prominent east west-oriented progradational linear ridges. The ridge system of Cat Island is interpreted as a relict of an earlier stage in the life cycle of the barrier platform when there was a more robust littoral drift system and an abundant sediment supply During the Pre-St. Bernard Delta period of vigorous sedimentation, all of the islands in the barrier chain probably exhibited progradational ridges similar to those now found only on Cat Island. Presently, only vestigial traces of these progradational features remain on the islands to the east of Cat Island. Unlike Cat Island, which has been protected and preserved by the St. Bernard Delta, the other barrier islands have been modified and reworked during the past 1,500 years by processes of island and tidal inlet migration, accompanied by a general weakening of the littoral drift and a reduction of the available sediment supply.

  3. A mid to late Holocene history of floodplain and terrace reworking along the middle Delaware River valley, USA

    NASA Astrophysics Data System (ADS)

    Stinchcomb, Gary E.; Driese, Steven G.; Nordt, Lee C.; Allen, Peter M.

    2012-10-01

    This study tests and refines the traditional floodplain development model for the partly confined middle Delaware River valley, which has shown that the main channel was relatively stable and flanked by a 6000-8000 year old, vertically accreting alluvial terrace. The Holocene alluvial processes and history presented here in 6 fluvial phases were reconstructed using morphostratigraphy, 36 profile descriptions, 332 grain size analyses, and 82 14C ages from soil trenches, auger borings, and archaeological excavations. Fluvial phases I-III largely validate previous reconstructions showing a late Pleistocene (I: > 10.7 ka) braided stream transition into an early Holocene wandering stream with prolonged floodplain stability (II: 10.7-8 ka), followed by early-middle Holocene erosion and then deposition (III: 8-5 ka). The early and middle Holocene changes in alluvial stratigraphy and sedimentology broadly correlate with climatically derived Holocene subdivisions, suggesting climate change partly controls alluvial response along the middle Delaware River valley. This study documents for the first time a middle Holocene episode of channel incision occurring sometime between 6.0 and 5.0 ka. Although the results reconfirm that the majority of alluvial landforms are composed of vertical accretion deposits, we present here new evidence of oblique, abandoned channel, and lateral accretion deposits inset to similar landforms with different formation histories (i.e., polycyclic terrace development), depicting a river valley that has experienced floodplain and terrace reworking. The majority of floodplain and terrace reworking occurs during the late-middle and late Holocene phases IV-VI (5.5-0 ka), following the middle Holocene incision event. These phases demonstrate floodplain reworking processes in the form of channel abandonment, stripping, flood channeling, and convex bank erosion. The subsequent space filled rapidly with evidence of multistory soil formation, and eventually

  4. Left Behind: Effects of marine reworking and sea-level rise on deltas of the 21st century (Invited)

    NASA Astrophysics Data System (ADS)

    Ashton, A. D.; Nienhuis, J.; Ortiz, A. C.; Lorenzo Trueba, J.; Giosan, L.

    2013-12-01

    The 21st century will represent a time of punctuated change for the morphology of the world's deltas as they face the doubled-edged impacts of sediment reduction during reservoir infilling and submergence by rising sea levels. This research focuses on the controls on the evolution of deltas strongly affected by marine processes, namely wind waves, with a particular emphasis on reworking. Our objective is to apply process-based quantitative means to advance our observational knowledge of how changes in sediment supply and accommodation growth through sea-level rise manifest through delta reworking and the delta cycle. Building upon previous research highlighting how the angle of approaching waves can leave a fingerprint on a delta's shape, we investigate how the coastal conditions prior to sediment cessation can be used to predict the morphologic shape of the ensuing reworked shore along and adjacent to the former delta, including the potential for forming spits and other features indicative of lobe abandonment. In general, reworking results in rapid retreat near the mouth, but tends to be mass conservative, with eroded shoreface-compatible sediment deposited distally along the shoreline. Sediment cessation stops growth, but does not necessarily mean a delta plain will shrink. This marine reworking can be better understood using analogues of wave-influenced delta lobes that have been subjected to large-scale avulsions over the late Holocene, such as the Ebro, Danube, and Volta deltas. While the effects of sediment reduction will tend to be focused around active river mouths, a rising sea will, in a manner, 'sink all coasts'. Although models of stratigraphic delta evolution typically focus on the active depositional phase of profile evolution, with the wave-affected shoreface acting as a conduit of sediment basinwards, passive coasts demonstrate that coastal systems can remain intact during rising sea level and without sediment sources. As such, passive margin

  5. Reworking of structural inheritance at strike-slip restraining-bends: templates from sandbox analogue models

    NASA Astrophysics Data System (ADS)

    Nestola, Yago; Storti, Fabrizio; Cavozzi, Cristian; Magistroni, Corrado; Meda, Marco; Piero Righetti, Fabrizio

    2016-04-01

    Structural inheritance plays a fundamental role during crustal deformation because pre-existing fault and shear zones typically provide weakness zone suitable to fail again when affected by a new regional stress field. Re-activation of structural inheritance is expected to unavoidably increase the complexity of structural architectures, whose geometric and kinematic patterns can significantly deviate from what expected in newly deformed crustal sectors. Availability of templates from analogue models can provide a very effective tool to help unraveling such a structural complexity. For this purpose, we simulated the reworking of a set of basement hosted pre-existing fault zones at strike-slip restraining fault bends. In the models, the mechanical stratigraphy consists of a basement, made of a mixture of dry kaolin and sand to slightly increase cohesion, and a sedimentary cover made by pure dry sand. Inherited fault zones are confined to the basement and coated by a thin veneer of silicone putty. In the experimental programme, the geometry of the left-lateral restraining bend is maintained the same, with a bending angle of 30° of the restraining fault segment. The strike of the inherited fault zones, measured counterclockwise with respect to that of the master strike-slip fault zone outside the restraining bend, was 0°, 30°, and 60° in different experiments, respectively. An end member experiment without inheritance was also run for comparison. Our experimental results show that the angle that the inherited fault zones make with the restraining bend plays a fundamental role in governing the deformation pattern. When structural inheritance is near parallel to the master strike-slip fault zone, synthetic shears form and severely compartmentalize the transpressional pop-up anticline growing on top of the restraining bend. Fault-bounded blocks undergo sinistral escape during transpression. On the other hand, when structural inheritance makes a high angle to the

  6. Reworked planktonic Foraminifera from the Late Rupelian of the southern Upper Rhine Graben and their palaeogeographic and biostratigraphic implications

    NASA Astrophysics Data System (ADS)

    Pirkenseer, C.; Spezzaferri, S.; Berger, J.-P.

    2009-04-01

    During the Late Rupelian the widespread second transgression (corresponding to international Ru2-3 transgressions; BERGER et al. 2005) affected the whole Upper Rhine Graben basin and led to the deposition of the several hundred meters thick marine "Série grise". An abrupt transition (erosion surface) between the uppermost "Série grise" and Niederroedern Formation indicates the change to fluviatile and lacustrine conditions throughout the basin close to the Late Rupelian / Early Chattian boundary. Abundant reworked Middle to Late Cretaceous (e.g., Marginotruncana pseudolinneiana) and Late Paleocene to Late Eocene (e.g., Acarinina bullbrooki, Morozovella subbotinae, Turborotalia cocoaensis) ranging planktonic Foraminifera occur in the "Série Grise" and equivalent lithological units of the Upper Rhine Graben and the Mainz Basin (e.g., FISCHER 1965, PIRKENSEER 2007, SCHÄFER & KUHN 2004). At least Late Cretaceous, Ypresian, Lutetian and Priabonian ages of source sediments are indicated by the overlapping biostratigraphic ranges of the reworked specimens. Abundant reworked material first appears in the lower "Couches à Mélettes" and reaches its acme in the increasingly "Marnes à Cyrènes" (terminal "Série grise"). Only sparse records are documented from the subsequent terrestrial Niederroedern Formation. These reworking events are linked to intervals of increased clastic input throughout the "Série grise". The planktonic Foraminifera are proposed to be reworked from related alpine deposits (later Helvetikum?) via a northwards trending fluviatile system, as no autochthonous Cretaceous and Early to Middle Eocene marine sediments were deposited within the graben basin. Furthermore other possible source areas (e.g., Paris Basin) were either not connected to the Upper Rhine Graben or were not subject to erosion in the Late Rupelian. This accords with the proposition (ROUSSÉ 2006) of a vast northwards prograding delta-system that was located close to the southern

  7. Lithotectonic framework and continental collisional reworking in the eastern part of the Sveconorwegian orogen

    NASA Astrophysics Data System (ADS)

    Andersson, Jenny; Möller, Charlotte; Stephens, Michael B.

    2013-04-01

    -to-the-ESE displacement followed by top-to-the-W extension. It forms a major structural, metamorphic and lithological terrane boundary. Lithotectonic units west thereof have been displaced out of their original tectonic context and cannot be directly linked to the remainder of the pre-Sveconorwegian Fennnoscandian Shield. Thus, considerable displacement must be accounted for. The Idefjorden terrane is the easternmost allochthonous belt of the orogen, directly overlying the Eastern Segment. It constitutes a patchwork of metamorphic sub-domains where high-grade complexes are juxtaposed against domains that show little or no imprint of Sveconorwegian reworking. Crustal thickening recorded by high-pressure granulite facies metamorphism (1.0-1.5 GPa and 700-740°C) has been dated at 1.05-1.02 Ga, i.e. at least 30 Ma earlier than the high-pressure metamorphism in the underlying Eastern Segment. The structural grain is orogen-parallel (in contrast to that in the Eastern Segment), with N-S-trending ductile fabrics, including fold axes, regional deformation zones and tectonic contacts of metamorphic complexes. The high- and medium-pressure metamorphism of the Eastern Segment (0.99-0.97 Ga) and the Idefjorden terrane (1.05-1.02 Ga) testifies to deep subduction of the Fennoscandian continental crust during the Sveconorwegian orogeny, broadly corresponding to the Rigolet and Ottawan phases of the Grenvillian orogeny, respectively. Both events are diagnostic of collisional orogeny, with syn-metamorphic intrusive activity limited to local dyke intrusion.

  8. Geochemical transition shown by Cretaceous granitoids in southeastern China: Implications for continental crustal reworking and growth

    NASA Astrophysics Data System (ADS)

    Chen, Jing-Yuan; Yang, Jin-Hui; Zhang, Ji-Heng; Sun, Jin-Feng

    2014-05-01

    -derived materials. The monzogranites have distinctly different zircon Hf and O isotope compositions from the enclaves, indicating that the parental magmas were mainly derived from ancient crust that interacted with underplated depleted mantle-derived magmas. The monzogranites have relatively high HREE contents, suggesting a garnet-free source (< 32 km), distinct from the Early Cretaceous adakite-like granites that were generated from a garnet-bearing source. Combined with previously published data, it is evident that Early Cretaceous adakite-like magmatic rocks (107-99 Ma) and associated mafic rocks (100-107 Ma) were widespread in SE China, indicating a crustal thickening event that was possibly induced by underplating of mantle-derived magma. Subsequently, between 99 and 87 Ma, crustal extension and lithospheric thinning induced the later widespread I-type granites with similar geochemical features to the Zaoshan pluton. A-type granites and syenites of this age are also present in SE China. The transition in geochemical and isotopic data, from enriched to depleted Hf isotope compositions as seen in the monzogranites, their enclaves and intrusive dolerites, suggest that depleted mantle-derived materials were involved in the generation of the monzogranites, further indicating continental crustal reworking and later crustal growth in SE China during the early Late Cretaceous.

  9. Micro-trace fossils reveal pervasive reworking of Pliocene sapropels by low-oxygen-adapted benthic meiofauna.

    PubMed

    Löhr, S C; Kennedy, M J

    2015-01-01

    Animal burrowers leave an indelible signature on the sedimentary record in most marine environments, with the seeming exception of low-oxygen environments. In modern sedimentary settings, however, sub-millimetre-sized benthic animals (meiofauna) are adapted to low oxygen and even sulfidic conditions. Almost nothing is known about their impact on ancient marine sediments because they leave few recognizable traces. Here we show, in classic Pliocene-aged anoxic facies from the Mediterranean, the first reported trace fossil evidence of meiofaunal activity and its relation to changing oxygenation. A novel approach utilizing electron imaging of ion-polished samples shows that meiofauna pervasively reworked sediment under oxygen-depleted conditions that excluded macrofauna, fragmenting organic laminae and emplacing 15- to 70-μm-diameter faecal pellets without macroscopically influencing the fabric. The extent of reworking raises the question: how pervasively altered are other sediments presently assumed to lack animal influence and how far into the geological record does this influence extend? PMID:25762504

  10. Removal of highly crosslinked resists and hybrid polymers for single micro parts fabrication and nanoimprint stamp rework

    NASA Astrophysics Data System (ADS)

    Voigt, Anja; Engelke, Rainer; Ahrens, Gisela; Bullerjahn, Franziska; Schleunitz, Arne; Klein, Jan J.; Grützner, Gabi

    2014-03-01

    Thick photoresists, e.g. up to 1 mm layer thickness, are widely used for the manufacture of high aspect ratio microstructures, e.g. as mould for the fabrication of metallic micro parts. Such resists or materials exhibit high mechanical and chemical stability to non-deformably withstand a pattern transfer process, e.g. by electroplating. After the pattern transfer a solvent based removal is difficult or not possible in many cases. A selective mould removal - without the damage of electroplated metal structures - is required for the fabrication of single micro parts. As second application example UV curable and strongly crosslinkable inorganic-organic hybrid polymers such as OrmoComp ® and OrmoStamp ® are used in UV moulding. The cleaning and rework of these moulds or also of stamps for nanoimprint lithography (NIL) is a challenging task with increasing importance. The life time of an expensive master mould or stamp as well as of the replicated working stamps is important, and therefore the ability to rework such stamps without any defect or decreased resolution. Hence, we demonstrate the application of a plasma-assisted removal using the STP 2020 etching tool from MUEGGE [1] for remote dry etching of strongly crosslinked materials, i.e. the development of processes for the isotropical etching of highly crosslinked photoresists and hybrid polymer materials will be presented. In combination with this specific etching tool this technique shows a high potential to make plasma-assisted removal ready for industrial production.

  11. Method for reworkable packaging of high speed, low electrical parasitic power electronics modules through gate drive integration

    DOEpatents

    Passmore, Brandon; Cole, Zach; Whitaker, Bret; Barkley, Adam; McNutt, Ty; Lostetter, Alexander

    2016-08-02

    A multichip power module directly connecting the busboard to a printed-circuit board that is attached to the power substrate enabling extremely low loop inductance for extreme environments such as high temperature operation. Wire bond interconnections are taught from the power die directly to the busboard further enabling enable low parasitic interconnections. Integration of on-board high frequency bus capacitors provide extremely low loop inductance. An extreme environment gate driver board allows close physical proximity of gate driver and power stage to reduce overall volume and reduce impedance in the control circuit. Parallel spring-loaded pin gate driver PCB connections allows a reliable and reworkable power module to gate driver interconnections.

  12. Discrimination of reworked pyroclastics from primary tephra-fall tuffs: a case study using kimberlites of Fort a la Corne, Saskatchewan, Canada

    NASA Astrophysics Data System (ADS)

    Leahy, Kevin

    Reworked volcaniclastics are traditionally discriminated from primary tephra-fall pyroclastics by an absence of features such as blanketing, juvenile lapilli, grain welding and poor sorting. Frequently, these features are difficult to identify, especially in small outcrops, ancient or altered successions, debris flows and surge deposits. Crystal-rich volcaniclastics, such as kimberlites, have a large proportion of coarse euhedral crystals, and abrasion leading to rounding can be recognised and classified with relative ease. A petrographic method of discriminating reworked material has been devised, based on the degree of grain roundness, and is illustrated using volcaniclastic kimberlite from Fort a la Corne, Saskatchewan, Canada. Petrographic thin sections of samples at regular intervals throughout the borehole core, and from a nearby crater-facies kimberlite, show that the percentages of rounded, subrounded and euhedral grains define two distinct groupings. The first group contains a higher percentage of euhedral grains and includes all the samples from the basal 4.8m of the 14.1-m-thick kimberlite section in borehole 004, and all of the crater facies tephra-fall tuffs. A second group contains more rounded, subrounded and fragmental grains and includes all the data from the upper 6.3m, which are interpreted as reworked strata. Thus, point counting concurs with hand-sample interpretation and may be used as a verification tool in discriminating reworked pyroclastic sands from primary tephra-fall tuffs.

  13. LA-ICP-MS analysis of isolated phosphatic grains indicates selective rare earth element enrichment during reworking and transport processes

    NASA Astrophysics Data System (ADS)

    Auer, Gerald; Reuter, Markus; Hauzenberger, Christoph A.; Piller, Werner E.

    2016-04-01

    water chemistry under certain well constrained circumstances of primary authigenesis. Are these conditions not met, REE patterns are more likely to reflect complex enrichment processes that likely already started to occur during reworking over geologically relatively short time frames. Similarities in the REE patterns of clearly detrital and biogenic phosphate further suggest that the often observed 'hat-shaped' pattern in biogenic phosphates can easily result from increased middle REE (Neodymium to Holmium) scavenging during taphonomic processes prior to final deposition. Finally, cluster analysis coupled with sedimentological considerations proved a valuable tool for the characterization of REE patterns of phosphates in terms of their formation conditions and depositional history, such as the distinction of phosphates formed in situ from reworked and transported phosphate grains.

  14. Producer-retailer integrated EMQ system with machine breakdown, rework failures, and a discontinuous inventory issuing policy.

    PubMed

    Chiu, Singa Wang; Chen, Shin-Wei; Chiu, Yuan-Shyi Peter; Li, Ting-Wei

    2016-01-01

    This study develops two extended economic manufacturing quantity (EMQ)-based models with a discontinuous product issuing policy, random machine breakdown, and rework failures. Various real conditions in production processes, end-product delivery, and intra-supply chains such as a producer-retailer integrated scheme are examined. The first model incorporates a discontinuous multi-delivery policy into a prior work (Chiu et al. in Proc Inst Mech Eng B J Eng 223:183-194, 2009) in lieu of their continuous policy. Such an enhanced model can address situations in supply chain environments, where finished products are transported to outside retail stores (or customers). The second model further combines retailer's stock holding costs into the first model. This extended EMQ model is applicable in situations in present-day manufacturing firms where finished products are distributed to company's own retail stores (or regional sales offices) and stocked there for sale. Two aforementioned extended EMQ models are investigated, respectively. Mathematical modeling along with iterative algorithms are employed to derive the optimal production run times that minimize the expected total system costs, including the costs incurred in production units, transportation, and retail stores, for these integrated EMQ systems. Numerical examples are provided to demonstrate the practical application of the research results. PMID:27065179

  15. History of Laurentide meltwater flow to the Gulf of Mexico during the last deglaciation, as revealed by reworked calcareous nannofossils

    NASA Astrophysics Data System (ADS)

    Marchitto, Thomas M.; Wei, Kuo-Yen

    1995-09-01

    The history of meltwater flow from the Laurentide Ice Sheet to the Gulf of Mexico during the last deglaciation, which holds possible implications for the cause of the Younger Dryas cold episode, is not well understood. We propose a new chronology based on using the percentage of reworked calcareous nannofossils in Orca Basin sediments as a proxy for erosion. The period of greatest meltwater flow to the gulf was between 12.7 and 12.1 ka (during the Bølling warm interval), and flow remained high until the beginning of the Younger Dryas cold episode at 11.3 ka; this corresponds to meltwater pulse IA. A sharp meltwater decrease at 12.2 ka may represent the Older Dryas glacial readvance. Little or no meltwater is inferred to have flowed to the gulf from ˜10 to 9 ka, which is the time of the second major meltwater pulse, IB. Therefore, meltwater must have been permanently diverted away from the Gulf of Mexico at the beginning of the Younger Dryas.

  16. Surficial geology of the Kennebec River paleodelta: A product of Pleistocene deposition, modification by Holocene transgression, and modern sediment reworking

    SciTech Connect

    Barnhardt, W.A.; Belknap, D.F. . Dept. of Geolofical Sciences); Kelley, J.T.; Dickson, S.M. )

    1993-03-01

    Large sandy lithosomes, interpreted as paleodeltas, are reported seaward of several major rivers entering the western Gulf of Maine. The lobate, smooth-topped morphology of the Kennebec River paleodelta smothers high-relief bedrock ridges on the inner continental shelf of south-central Maine. Since 1991, 488 km of side-scan sonar records and 116 km of high-resolution seismic reflection profiles were collected in this recently glaciated region. Coupled with 120 previously collected bottom samples and observations from numerous submersible dives, these data were used to map the surficial geology of the area and elucidate its relationship to the late Quaternary stratigraphy. The Kennebec paleodelta formed approximately 12--10 ka when sea level fell to a depth of 60 m and abundant sandy material was delivered to the lowstand shoreline. Subsequent marine transgression with reduced sediment input greatly modified the former delta, creating a patchwork of palimpsest deltaic and relict shoreline features overprinted by younger coastal and shelf processes. As barrier beach and estuarine systems transgressed from the lowstand shoreline to their position at the present coast, shoreface erosion exhumed underlying units, exposing a variety of textural facies across the delta surface. In adjacent areas 15--30 m deep and along much of the seaward margin, elongate bands of rippled gravel are oriented perpendicular to shore, indicating modern sediment reworking and cross-shelf transport. These rippled scour depressions often coincide with older glacial marine sediments cropping out on the surface. Vibracores and current meter measurements collected in 1992 will help resolve many questions concerning the past evolution of the paleodelta and the effects of modern processes on the distribution of surficial sediments.

  17. Google Wave: Collaboration Reworked

    ERIC Educational Resources Information Center

    Rethlefsen, Melissa L.

    2010-01-01

    Over the past several years, Internet users have become accustomed to Web 2.0 and cloud computing-style applications. It's commonplace and even intuitive to drag and drop gadgets on personalized start pages, to comment on a Facebook post without reloading the page, and to compose and save documents through a web browser. The web paradigm has…

  18. Rethink, Rework, Recycle.

    ERIC Educational Resources Information Center

    Wrhen, Linda; DiSpezio, Michael A.

    1991-01-01

    Information about the recycling and reuse of plastics, aluminum, steel, glass, and newspapers is presented. The phases of recycling are described. An activity that allows students to separate recyclable materials is included. The objectives, a list of needed materials, and procedure are provided. (KR)

  19. Sediment provenance, reworking and transport processes in the Indus River by U-Pb dating of detrital zircon grains

    NASA Astrophysics Data System (ADS)

    Alizai, Anwar; Carter, Andrew; Clift, Peter D.; VanLaningham, Sam; Williams, Jeremy C.; Kumar, Ravindra

    2011-03-01

    We present new major and trace element data, together with U-Pb ages for zircon sand grains from the major tributaries of the Indus River, as well as the adjacent Ghaggar and Yamuna Rivers and from bedrocks within the Sutlej Valley, in order to constrain the origin of the sediment reaching the Arabian Sea. Zircon grains from the upper Indus are generally younger than 200 Ma and contrast with those from the eastern tributaries eroded from Himalayan sources. Grains younger than 15 Ma, which typify the Nanga Parbat Massif, comprise no more than 1-2% of the total, even in the upper Indus, showing that this terrain is not a major sediment producer, in contrast with the Namche Barwe Massif in the eastern Himalayan syntaxis. The Sutlej and Yamuna Rivers in particular are very rich in Lesser Himalayan-derived 1500-2300 Ma zircons, while the Chenab is dominated by 750-1250 Ma zircons, mostly eroded from the Greater Himalaya. The upper Indus, Chenab and Ravi yield zircon populations broadly consistent with the outcrop areas, but the Jhelum and the Sutlej contain many more 1500-2300 Ma zircons than would be predicted from the area of Lesser Himalayan rock within their drainages. A significant population of grains younger than 200 Ma in the sands of the Thar Desert indicates preferential eolian, monsoon-related transport from the Indus lower reaches, rather than reworking from the local rivers. Modelling of observed zircon ages close to the delta contrasts with modern water discharge. The delta is rich in zircons dating 1500-2300 Ma, while discharge from modern rivers carrying such grains is low. The modest size of the Sutlej, the richest source of these materials in the modern system, raises the possibility that the compositionally similar Yamuna used to flow westwards in the recent past. Our data indicate a non-steady state river with zircon transport times of 5-10 k.y. inferred from earlier zircon dating of delta sands. The modern delta zircons image an earlier, likely

  20. Late Quaternary aeolian sand deposition sustained by fluvial reworking and sediment supply in the Hexi Corridor - An example from northern Chinese drylands

    NASA Astrophysics Data System (ADS)

    Nottebaum, Veit; Lehmkuhl, Frank; Stauch, Georg; Lu, Huayu; Yi, Shuangwen

    2015-12-01

    Aeolian deposits are frequently used for palaeoenvironmental change studies. Their formation depends on an array of requirements: the supply of material suitable for aeolian transport and favorable conditions of sediment availability and wind strength. In order to infer palaeoenvironmental information from aeolian sand deposits these factors need to be carefully evaluated. We present a study from northern Chinese Hexi Corridor, based on 11 optically stimulated luminescence (OSL) dated sediment sections. These represent interchanging aeolian and alluvial deposits under gravel surfaces and aeolian sand in dune fields interrupted by interdunal flood deposits. Investigations in two subareas reveal contrasting geomorphologic and sedimentary histories: (1) sediment deposition during the Pleistocene-Holocene transition (~ 12 ka) followed by deflation during the Holocene and (2) frequent sediment recycling revealed by a wide spectrum of ages throughout the Holocene. The late glacial sediment pulse recorded in the western Hexi Corridor is attributed to high sediment supply, generated by efficient (peri-)glacial sediment production during glacial times in the adjacent Qilian Shan (< 5700 m asl) and a moisture increase inducing the reworking of those (glacio-)fluvial deposits during the Pleistocene-Holocene transition. The absence of a powerful reworking agent preserved these late glacial deposits in the western Hexi Corridor in contrast to moister eastern parts where Holocene sediment reworking prevailed. Geomorphological and hydrological preconditions of the subareas are discussed and reveal the controlling influence of fluvial processes on sand supply for the aeolian system. While a perennial drainage is missing in the drier western part, the Hei River drainage is fed by higher monsoonal precipitation in the central Hexi Corridor. It maintains a sediment recycling system and has ensured a sufficient sediment supply throughout the Holocene. The study promotes closer

  1. Organic-looking' carbon and nitrogen isotope compositions in mantle derived diamondites: Mantle fractionation vs. re-worked crustal organics?

    NASA Astrophysics Data System (ADS)

    Mikhail, Sami; Dubosi, Gabor; Verchovsky, Sahsa; Jones, Adrian; Kurat, Gero

    2010-05-01

    composition (5). There are two ways in which these diamondites could have been formed based on their carbon and nitrogen isotope compositions: (1) Reworking (either recycling via remobilisation of the lower lithosphere or subduction) could have provided the carbon and nitrogen which have preserved their ‘organic-like' signatures; or (2) the loss of 13C rich oxidised carbon from the system by carbonisation of olivine (explaining the lack of olivine inclusions in diamondites) during diamondite crystallisation would result in increasing of the N/C ratio (≈ N ppm) and a drives the carbon isotopic value lighter. The small increase in nitrogen isotopes to more heavy values (at this early stage) is thought to be a function of a small loss of nitrogen from the substrate. This is followed by continuous diamond formation where oxidised carbon is lost via silicate carbonisation and the formation of carbonates (13C enrichment in the source) and nitrogen is removed from the source by being partitioned into the crystallising diamonds (15N enrichment in the source). During such progressive crystallisation of diamondites the carbon and nitrogen isotope compositions can be fractionated to extremely ‘organic-like' values. We find that both models warrant sufficient discussion for this data set. 1.G. Dobosi, G. Kurat, Mineralogy and Petrology 76, 21 (2002). 2.G. Kurat, G. Dobosi, Mineralogy and Petrology 69, 143 (2000). 3.R. Burgess, L. H. Johnson, D. P. Mattey, J. W. Harris, G. Turner, Chemical Geology 146, 205 (1998). 4.M. Honda, D. Phillips, J. W. Harris, I. Yatsevich, Chemical Geology 203, 347 (2004). 5.T. Maruoka, G. Kurat, G. Dobosi, C. Koeberl, Geochimica Et Cosmochimica Acta 68, 1635 (2004). 6.D. A. Shelkov, A. B. Verchovsky, H. J. Milledge, C. T. Pillinger, Chemical Geology 149, 109 (1998). 7.C. Gautheron, P. Cartigny, M. Moreira, J. W. Harris, C. J. Allègre, Earth and Planetary Science Letters 240, 559 (2005). 8.D. E. Jacob, K. S. Viljoen, N. Grassineau, E. Jagoutz, Science 289

  2. The U-Pb, Hf and O isotopic record of ancient detrital zircons in Zimbabwean sediments - formation, reworking and nature of early Archaean crust

    NASA Astrophysics Data System (ADS)

    Bolhar, Robert; Hofmann, Axel; Kemp, Anthony I. S.; Whitehouse, Martin J.; Wind, Sandra; Feng, Yuexing

    2014-05-01

    Hafnium and oxygen isotopic compositions measured in-situ on U-Pb dated zircon from different Archaean sedimentary successions belonging to the 2.9-2.8 Ga Belingwean/Bulawayan Groups and undated Sebakwian Group are presented to better define the crustal evolution of the Zimbabwe Craton prior to 3.0 Ga. Textural and compositional criteria were employed to minimize effects arising from Pb loss, metamorphic overprinting and interaction with low temperature fluids. 207Pb/206Pb age spectra (concordance > 90%) reveal prominent peaks at 3.8, 3.6, 3.5, and 3.35 Ga, corresponding to documented geological events both globally and within the Zimbabwe craton. O isotope compositions of ~ 4 - 10 opoint to both derivation from magmas in equilibrium with mantle and the assimilation of supracrustal material or interaction with metamorphic fluids. In ɛHf-time space, 3.8-3.6 Ga grains define an array consistent with derivation from a mafic to intermediate source reservoir (Lu/Hf ~0.015) that separated from chondritic mantle at ~ 3.9 Ga. Crustal domains formed after 3.6 Ga depict a more complex evolution, involving contribution from juvenile mantle sources and reworking of pre-existing crust. Importantly, initial Hf isotopic compositions document a protracted history of remelting, without evidence for significant mantle depletion prior to 3.35 Ga. This suggests that production of earliest crust in the Zimbabwe Craton did not cause complementary enriched and depleted reservoirs, possibly because heterogeneous mantle was effectively remixed by rapid convection due to higher temperatures in the early Archaean or the volume of crust was too small in volume to influence the isotopic mantle evolution. Similar Hf-O-time relationships observed in southern West Greenland were used as a basis to propose a transition in geodynamics 3.2 Ga ago. The absence of detrital zircons with crystallization ages > 3.8 Ga, along with a simple ɛHf-time array consistent with reworking of a mafic protolith

  3. Growth of continental crust and its episodic reworking over >800 Ma: evidence from Hf-Nd isotope data on the Pietersburg block (South Africa)

    NASA Astrophysics Data System (ADS)

    Laurent, Oscar; Zeh, Armin; Moyen, Jean-François; Doucelance, Régis; Martin, Hervé

    2014-05-01

    The formation and evolution of the continental crust during the Precambrian, and in particular during the Archaean eon (4.0-2.5 Ga), is still a matter of debate. In particular, it is not yet clear in which tectonic environment the genesis of crust took place and how the large volume of granitoid rocks that form ~70% of the Archaean crust were extracted from the mantle. Many studies highlighted that radiogenic isotope systems, especially Lu-Hf and Sm-Nd, are powerful tools to unravel the respective extent of crustal growth and recycling in Archaean terranes. This work presents coupled Hf and Nd isotope data (analyzed both in situ in accessory minerals and in whole rock samples) of Meso- to Neoarchaean granitoids, applied to unravel the processes of crust formation and evolution of the Pietersburg crustal block in South Africa. This crustal segment, the northermost one of the Archaean Kaapvaal Craton, is separated from older crust (3.65-3.10 Ga) by a large-scale suture zone, and the processes related to amalgamation of both blocks and their subsequent evolution are still unclear. The Pietersburg block is made up of a wide range of Archaean granitoid rocks, including tonalite-trondhjemite-granodiorite (TTG) series, high-K monzogranites as well as (grano)diorites belonging to the so-called "sanukitoid" group [1], all intruded by late Paleoproterozoic alkaline complexes. Age determinations highlighted two stages of granitoid formation: (1) TTG magmatism took place episodically over >400 Ma between 3.34 and 2.89 Ga, with a major pulse at 2.97-2.90 Ga; while (2) all the other (high-K) granitoid types emplaced subsequently between 2.84 and 2.69 Ga before a long magmatic shutdown until the intrusion of alkaline complexes at ~2.00 Ga [2-3]. Isotope systematics reveal that these two stages are related to juvenile crust formation and crust reworking, respectively. Indeed, all Hf-Nd isotope data from TTG gneisses are suprachondritic, pointing to a juvenile origin and precluding

  4. Structural and seismic data on a new branch of the North Anatolian Fault: A reworked Tertiary thrust fault in northwestern Turkey

    NASA Astrophysics Data System (ADS)

    Aylan, E.; Akbayram, K.; Imren, C.

    2012-04-01

    The North Anatolian Fault (NAF) is an over 1200 km long dextral strike-slip fault in the eastern Mediterranean. The North Anatolian Fault (NAF) and its related branches together make up the North Anatolian Shear Zone (NASZ). The NASZ has two well known active segments in Adapazarı - Sakarya - Bolu region, northwestern Turkey. We provide new structural, stratigraphical and seismic data showing that a previously unknown third segment also exists and created as a result of reworking of Cenozoic thrust faults by the recent deformation of the NAF, in northwest Turkey. Our study area is within Sakarya Basin which consists of ~6 km thick Jurassic - Lower Tertiary sediments, located between the main branch of the NAF in the north and a Mesozoic suture zone in the south. During Tertiary the units in the Sakarya Basin is folded and faulted as a result of north - south shortening. Interestingly one of these thrust faults, so called Pirler Fault, is a deep angle fault dipping 70° south. Later regional analysis on the Pirler Fault shows that this fault is approximately 200 km long, extended southwest to northeast, from the southern border of a Quaternary basin (Gölpazarı Basin of Sakarya city) to the main segment of the NAF (Gerede region of Bolu city). Distribution of the epicenters of recent earthquakes also shows that there is much activity going on the Pirler Fault, generating Mw = 2 - 4 earthquakes.

  5. Relating geodynamic setting to periods of crustal growth and reworking as illustrated by the Phanerozoic granitoids of the Eastern Cordillera of South Peru

    NASA Astrophysics Data System (ADS)

    Reitsma, M.; Schaltegger, U.; Spikings, R.; Ulianov, A.; Gerdes, A.; Chiaradia, M.

    2012-04-01

    The granitoids that form the backbone of the Eastern Cordillera of Peru between 12 and 14°S, are the ideal material for a case study to relate geodynamic setting to crustal growth over the period of a Wilson cycle. Extension related plutons were emplaced in the back-arc region of the Western Gondwana margin during the Ordovician, Permo-Carboniferous, Triassic and Early Jurassic. With the onset of the Andean cycle in the Middle Jurassic the South American margin was under compression, the plutonic record of this period is in the study area restricted to the Eocene and Miocene. The Ordovician to Triassic back-arc related plutons share many geochemical characteristics that point to dominant crustal reworking as the main process during their formation. These are 1) their mainly felsic and peraluminous nature; 2) the similarity of whole rock REE and trace element compositions compared to those of average continental crust; 3) the presence of negative Nb-Ta anomalies only in the more evolved samples which indicates that these excursions have been obtained by crustal melting rather than from a slab fluid and 4) the presence of significant amounts of xenocrystic cores in zircon. According to the literature the last major episode of juvenile crust formation was during the Grenvillian age Sunsas event (1.2 - 0.9 Ga) related to the collision of Laurentia and south-western Amazonia during the assembly of Rodinia. Hf-isotopes on zircons from the Ordovician, Permo-Carboniferous and Triassic plutons confirm their origin as mainly crustal melts generated by reworking of Sunsas-age crust. Under these geodynamic conditions it is mainly the crust that melts due to an elevated geothermal gradient as the result of crustal thinning. However, data from Jurassic nepheline bearing syenite and Eocene hornblende diorite and monzonite have epsilon Hfi values well above those of Sunsas crust, indicating an important mantle component in the melts. The Jurassic geodynamic setting is interpreted

  6. A 2.5 G.a. reworked sialic crust: Rb-Sr ages and isotopic geochemistry of late archaean volcanic and plutonic rocks from E. Finland

    NASA Astrophysics Data System (ADS)

    Martin, Hervé; Querré, Guirec

    1984-03-01

    In east-central Finland, Archaean terrains present three main lithologic units: a) gneissic basement, emplaced from 2.86 G.a. to 2.62 G.a., b) greenstone belt (2.65 G.a.) and c) calc-alkaline magmatism (2.50 G.a. to 2.40 G.a). Twenty three rocks of the calc-alkaline suite have been chosen for geochronologic and Rb-Sr isotopic studies. These rocks are subdivided into three groups: 1) acid volcanics from Luoma, 2) augen gneiss from Arola, and 3) post kinematik pink leucogranite from Arola. The 2.50±0.10 G.a. age of the Luoma volcanics indicates that they represent the upper part of a greenstone belt composed of a single sequence of volcanic rocks. The ages, initial 87Sr/86Sr (ISr) and major element compositions of the augen gneisses of Arola and Suomussalmi indicate that these rocks are the plutonic equivalents of the Luoma acid volcanics. The Arola pink leucogranite marks the terminal phase of Archaean magmatic activity (from 2.86 G.a. to 2.41 G.a.). This was followed by at least 0.40 G.a. of quiescence. The ISr and major element compositions suggest that the genesis of the calc-alkaline magmatic rocks involved crustal materials, but all their geochemical features cannot be explained without the participation of mafic greenstone belt materials. The first crustal components had low I and low K2O/ Na2O ratios while the younger ones (calc-alkaline magmas) had medium to high ISr and high K2O/Na2O ratios. Thus the petrogenetic processes have changed with time from ensimatic to ensialic, implying major reworking of preexisting crustal materials. This evolution leads to the accretion of the continental crust from the mantle.

  7. Reworked pre-Grenville crust and timing of Grenville orogenesis in the southeastern Llano Uplift, Texas: Results from U-Pb geochronometry

    SciTech Connect

    Reese, J.F.; Roback, R.C.; Walker, N.W. . Geological Sciences)

    1992-01-01

    Zircon geochronometry of metaigneous units in the southeastern Llano Uplift (1) show that 1355-1215 Ma rocks were tectonically reworked during the Grenville orogeny, (2) further constrain the timing of Grenville orogenesis along the southern margin of North America, and (3) necessitate revision of previously proposed stratigraphic and structural relations within the Llano Supergroup. Multigrain, abraded zircon fractions from a sample of quartzofeldspathic Valley Spring Gneiss (VSG) define a discordia trajectory with an upper intercept of 1355 [plus minus] 3 Ma, interpreted as the igneous crystallization age of the protolith. This age is the oldest thus far documented for Llano Supergroup protoliths and is substantially older than a recently reported age (1232 [plus minus]4 Ma) from a different part of the VSG. The lithologic and chronometric similarities of the old VSG to rocks to the Mid-continent Granite-Rhyolite terrane raise the possibility of genetic relations between these units. Thus components of the VSG are tentatively interpreted to represent a deformed and metamorphosed part of the southernmost Mid-Continent Granite-Rhyolite terrane. Alternatively, this rock could be part of an ensialic arc built upon the margin of southern North America and later deformed during the Grenville orogeny. Analyses from four abraded zircon fractions from a quartzofeldspathic gneiss in the structurally overlying Packsaddle Schist yield an upper intercept of 1215 [plus minus] 3 Ma, interpreted as the igneous protolith crystallization age. This age is the youngest yet determined for a polydeformed metamorphic rock in the Llano Uplift and more tightly brackets the timing of Grenville deformation in the southeastern Llano Uplift to post-1215 Ma and pre-1098 Ma.

  8. Integrated Nd isotopic and U-Pb detrital zircon systematics of clastic sedimentary rocks from the Slave Province, Canada: evidence for extensive crustal reworking in the early- to mid-Archean

    NASA Astrophysics Data System (ADS)

    Yamashita, Katsuyuki; Creaser, Robert A.; Villeneuve, Mike E.

    2000-01-01

    A combined U-Pb geochronology and Nd isotopic analysis of clastic metasedimentary rocks from the Archean Slave Province, Northwest Territories, Canada is presented. A series of clastic sedimentary rocks with deposition age of ˜3.13 Ga to ˜2.58 Ga was collected from the west-central Slave Province. These samples include conglomerates as well as finer sedimentary rocks such as greywacke, arkose and quartzite. Although it is generally agreed that the Nd model age ( TDM) of clastic sedimentary rocks represents the average sedimentary provenance age, TDM of samples studied here is generally older than the average U-Pb age of detrital zircons extracted from the same sample. Rather, there seems to be a better ˜1:1 relationship between the TDM and U-Pb age of the oldest zircon from each sample. A simple model relationship between U-Pb geochronology and TDM suggests that such correlation is a result of Archean crustal evolution of the Slave Province being dominated by crustal reworking (i.e. intracrustal processes) rather than addition of juvenile materials from the mantle. One exception is the period between ˜3.1 and ˜3.2 Ga, during which period a significant portion of detrital zircons have U-Pb ages exceeding the TDM, indicating a large input of juvenile material and/or decreasing level of crustal reworking. An alternative explanation for the U-Pb vs. TDM trend may be a mixing of older mafic juvenile crust (containing no zircon) and younger felsic juvenile crust. However, the general lack of extensive pre-2.8 Ga mafic crust in the Slave Province makes this scenario unlikely. The results of this study cannot constrain the change in the volume of continental crust at any given period of time, since the addition of juvenile crust may always be counterbalanced by recycling of crustal material back into the mantle. However, a dominance of crustal reworking during the early- to mid-Archean strongly implies that a large part of ancient crust was lost during the younger

  9. Metamorphic and age constraints on tectono-thermal reworking in the western H.U. Sverdrupfjella: A new crustal evolution model for Western Dronning Maud Land, Antarctica

    NASA Astrophysics Data System (ADS)

    Grosch, Eugene; Frimmel, Hartwig; Abu-Alam, Tamer; Košler, Jan

    2014-05-01

    -African thrust, which was subsequently reactivated during Gondwana break-up. These new results are integrated with published regional age (e.g. Frimmel, 2004) and geochemical (Grosch et al., 2007) data to propose a new geodynamic evolution model for Western Dronning Maud Land, with implications for Rodinia and Gondwana reconstructions. The revised Mesoproterozoic to Pan-African crustal evolution model for western Dronning Maud Land, proposes that the Maud Belt initially formed as a continental volcanic arc on the southeastern Grunehogna Craton margin, and not as an independent, Mesoproterozoic juvenile oceanic island arc. It follows that the PJD does not represent a Mesoproterozoic suture zone between a juvenile island arc and the Grunehogna Craton, but more likely a continental, Mesoproterozoic-Pan-African back-arc thrust zone. It is proposed herein, that large parts of the southeastern Kalahari-Grunehogna Craton margin (that included the Maud continental volcanic arc crust), experienced major tectonic reworking at eclogite to upper amphibolite facies conditions during Gondwana assembly. As such the new data from Western Dronning Maud Land has important implications for the extension of the Mozambique Belt into Antarctica and the location of the main suture zone between East and West Gondwana.

  10. Archaean and Palaeoproterozoic gneisses reworked during a Neoproterozoic (Pan-African) high-grade event in the Mozambique belt of East Africa: Structural relationships and zircon ages from the Kidatu area, central Tanzania

    NASA Astrophysics Data System (ADS)

    Vogt, M.; Kröner, A.; Poller, U.; Sommer, H.; Muhongo, S.; Wingate, M. T. D.

    2006-06-01

    crustal remnants that were reworked during the Neoproterozoic Pan-African orogeny.

  11. National Emission Standards for Hazardous Air Pollutants (NESHAP), Aerospace Manufacturing and Rework Facilities Rule: Operational and economic impacts at U.S. Air Force Air Combat Command (ACC) installations

    SciTech Connect

    Moore, T.C.; Durand, G.P.; Senn, M.R.

    1997-12-31

    The recently promulgated Aerospace Manufacturing and Rework Facilities National Emission Standards for Hazardous Air Pollutants (NESHAP), found in 40 CFR 63 Subpart GG, is expected to significantly impact operations at US Air Force (USAF) bases. At the request of the USAF`s Air Combat Command (ACC), Armstrong Laboratory`s Air Quality Branch performed a compliance assessment for all ACC bases in the summer of 1996 to determine more clearly the rule`s impact on operations at these bases. This assessment included first determining the base`s current major source standing for hazardous air pollutants (HAPs), as defined by Title III of the Clean Air Act. In addition, this assessment ascertained the volatile organic compound (VOC) and HAP content levels for both the primers and topcoats currently being used in base aircraft maintenance operations. Finally, the survey determined the type of solvents used in cleaning aerospace parts, as well as the types of control equipment currently in place at each base. The results of the compliance assessment suggest a prohibitive impact on operations at ACC bases, including total potential direct monetary costs of up to $25M. Additional personnel requirements will be incurred as a result of increased monitoring, recordkeeping, and reporting. Substitution of low VOC/HAP primers and topcoats and/or redefining maintenance operations to meet touch-up and repair definitions are discussed as possible alternatives, but the results indicate the best solution is to reassess each ACC base`s status as a major source for HAPs, with the intent of having each base defined as a minor source for HAPs. In this manner, the ACC bases can avoid the Aerospace NESHAP compliance requirements altogether, at substantial savings to the US Air Force.

  12. 7 CFR 29.3542 - Rework.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... INSPECTION Standards Official Standard Grades for Dark Air-Cured Tobacco (u.s. Types 35, 36, 37 and Foreign... separated by sorting; (b) Tobacco which contains an abnormally large quantity of foreign matter or...

  13. 7 CFR 29.3542 - Rework.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... INSPECTION Standards Official Standard Grades for Dark Air-Cured Tobacco (u.s. Types 35, 36, 37 and Foreign... separated by sorting; (b) Tobacco which contains an abnormally large quantity of foreign matter or...

  14. 7 CFR 29.3542 - Rework.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... INSPECTION Standards Official Standard Grades for Dark Air-Cured Tobacco (u.s. Types 35, 36, 37 and Foreign... separated by sorting; (b) Tobacco which contains an abnormally large quantity of foreign matter or...

  15. 7 CFR 29.3542 - Rework.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... INSPECTION Standards Official Standard Grades for Dark Air-Cured Tobacco (u.s. Types 35, 36, 37 and Foreign... separated by sorting; (b) Tobacco which contains an abnormally large quantity of foreign matter or...

  16. Robust, Rework-able Thermal Electronic Packaging: Applications in High Power TR Modules for Space

    NASA Technical Reports Server (NTRS)

    Hoffman, James Patrick; Del Castillo, Linda; Hunter, Don; Miller, Jennifer

    2012-01-01

    The higher output power densities required of modern radar architectures, such as the proposed DESDynI [Deformation, Ecosystem Structure, and Dynamics of Ice] SAR [Synthetic Aperture Radar] Instrument (or DSI) require increasingly dense high power electronics. To enable these higher power densities, while maintaining or even improving hardware reliability, requires improvements in integrating advanced thermal packaging technologies into radar transmit/receive (TR) modules. New materials and techniques have been studied and are now being implemented side-by-side with more standard technology typically used in flight hardware.

  17. Lesson Plans Are Being Reworked To Stretch Construction Dollars.

    ERIC Educational Resources Information Center

    Rubin, Debra K.; Rosta, Paul; Gonchar, Joann; Illia, Tony

    2002-01-01

    Discusses the search by school systems and construction professionals for new efficiencies in the face of economic pressures. Some are shrinking or stretching out construction programs and demanding better economies. Others are seeking new financial partners and non-traditional funding methods, or deciding that creating new school space does not…

  18. Reworking Industrial Models, Exploring Contemporary Ideas, and Fostering Teacher Leadership

    ERIC Educational Resources Information Center

    Steel, Christopher; Craig, Elizabeth

    2006-01-01

    If the culture of teaching is to change from one of isolation and professional limitations to one of collaboration and empowerment, administrators must change how they view and interact with teachers. Mr. Steel and Ms. Craig offer specific recommendations for how school leaders can support and facilitate teachers' growth. (Contains 9 endnotes.)

  19. Complete Alpine reworking of the northern Menderes Massif, western Turkey

    NASA Astrophysics Data System (ADS)

    Cenki-Tok, B.; Expert, M.; Işık, V.; Candan, O.; Monié, P.; Bruguier, O.

    2016-07-01

    This study focuses on the petrology, geochronology and thermochronology of metamorphic rocks within the northern Menderes Massif in western Turkey. Metasediments belonging to the cover series of the Massif record pervasive amphibolite-facies metamorphism culminating at ca. 625-670 °C and 7-9 kbars. U-Th-Pb in situ ages on monazite and allanite from these metapelites record crustal thickening and nappe stacking associated with the internal imbrication of the Anatolide-Taurides platform during the Eocene. In addition, new 39Ar/40Ar single muscovite grain analyses on deformed rocks were performed in three localities within the northern Menderes Massif and ages range from 19.8 to 25.5 Ma. These mylonites may be related to both well-known detachments, Simav to the north and Alaşehir to the south, which accommodate Oligo-Miocene exhumation of the Menderes core complex. U-Th-Pb data on monazite grains (22.2 ± 0.2 Ma) from migmatites emplaced within the Simav detachment confirm these ages.

  20. Archean evolution of the Leo Rise and its Eburnean reworking

    NASA Astrophysics Data System (ADS)

    Thiéblemont, Denis; Goujou, Jean Christian; Egal, Emmanuel; Cocherie, Alain; Delor, Claude; Lafon, Jean Michel; Fanning, C. Mark

    2004-06-01

    Recent geological mapping in southeastern Guinea, supported by zircon dating, has called into question traditional understanding concerning the evolution of the Leo Rise. Gneiss dated at about 3540 Ma appears to constitute the earliest evidence for continental accretion within the Leo Rise. The existence of a Leonian depositional cycle at about 3000 Ma is confirmed, marked by volcanic and sedimentary rocks that can be correlated with the Loko Group in Sierra Leone. The span of ages (3244-3050 Ma) suggests that the Leonian cycle comprises different episodes whose respective chronology is as yet uncertain. Clearly distinct from the Leonian cycle, the Liberian cycle (˜2900-2800 Ma) is represented in Guinea by granite and migmatite (˜2910-2800 Ma), reflecting remobilization of the ancient Archean basement and deformation of the Leonian rocks; no deposition is associated with this cycle. After the Liberian, the Nimba and Simandou successions, containing Liberian detrital zircons, are assigned to the Birimian (˜2200-2000 Ma). Finally, Eburnean tectonism caused intense deformation of the Archean craton, accompanied by high-grade metamorphism and the intrusion of granite and syenite with ages between 2080 and 2020 Ma. The evolution of the Kénéma-Man domain, attributed to the cumulated effect of the Leonian and Liberian cycles, is thus in part Eburnean. We can suppose, therefore, that the NNE-SSW-trending structures attributed to the Liberian in Sierra Leone are, in fact, Eburnean. The Kambui Supergroup, also affected by this tectonism, should thus be assigned to the Birimian rather than the Liberian, which would explain its similarities with the Nimba and Simandou successions.

  1. The "Rebbe" Reworked: An Inquiry into the Persistence of Inherited Traditions of Teaching.

    ERIC Educational Resources Information Center

    Pomson, Alex

    2002-01-01

    Examines the strength of teaching archetypes, highlighting accounts from Jewish day school teachers about their lives and work to investigate the strength of traditional conceptions of teaching. Results illustrate how a teacher draws on a strong tradition of Jewish teaching even as she transforms her enactment of that tradition to accommodate new…

  2. ENVIRONMENTAL RESEARCH BRIEF: WASTE MINIMIZATION ASSESSMENT FOR A MANUFACTURER OF NEW AND REWORKED ROTOGRAVURE PRINTING CYLINDERS

    EPA Science Inventory

    The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack the expertise to do so. aste Minimization Assessment Centers (WMACs) were established at selected un...

  3. 30 CFR 256.70 - Extension of lease by drilling or well reworking operations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... operations are approved by the Secretary according to the conditions set forth in 30 CFR 250.180. ..., DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL...

  4. 30 CFR 256.70 - Extension of lease by drilling or well reworking operations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... operations are approved by the Secretary according to the conditions set forth in 30 CFR 250.180. ..., DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL...

  5. 30 CFR 256.70 - Extension of lease by drilling or well reworking operations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... operations are approved by the Secretary according to the conditions set forth in 30 CFR 250.180. ..., DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL...

  6. The effect of rainfall events with changing frequency and magnitude on reworking conditions of proglacial moraines

    NASA Astrophysics Data System (ADS)

    Dusik, Jana-Marie; Heckmann, Tobias; Neugirg, Fabian; Hilger, Ludwig; Haas, Florian; Becht, Michael

    2014-05-01

    The consequences of the ongoing temperature rise in alpine regions force glaciers to rapid melting and thus new surfaces are exposed to generate numerous geomorphic processes. Steep Little Ice Age (LIA) moraines and other glacial depositional landforms contain huge masses of sediments, that are subject to progressive (re-)mobilization by gullying, slope wash, debris flows and other mass movements. The material is frequently re-deposited in secondary storage landforms; these storages themselves are then subject to depletion. Increased morphodynamics with a maximum shortly after deglaciation, and a slow decrease afterwards, are predicted by the conceptual model of paraglacial response. In addition to these "self-organising" changes following deglaciation, our study area has been experiencing changes in precipitation and (meltwater) discharge for decades; these climatic factors are known to influence morphodynamics, e.g. by triggering mass movements and by driving slope wash and fluvial erosion. While overall precipitation appears to decrease, heavy rainfall events become more intense, and discharge rates of glacial melt water channels show a significant increase. The PROSA joint project (High-resolution measurements of morphodynamics in rapidly changing PROglacial Systems of the Alps) uses terrestrial and airborne LiDAR data and digital Photogrammetry to monitor surface changes in the Upper Kaunertal, Austrian Central Alps (64 km²). These are related to the deglaciation since the end of the LIA and to changes in hydrometeorological parameters since several decades ago. The aim of this study is to investigate a possible relationship between climate change signals and erosion rates in the proglacial area of the Gepatschferner. The morphodynamics of steep LIA moraines are assessed on multiple temporal scales: Long-term changes are analyzed based on multitemporal airborne images dating back to 1953. The recent development is measured using digital elevation models (DEM) generated from multitemporal airborne (2006, July 2012, September 2012) and terrestrial (July 2010, August 2010, September 2011, July 2012, September 2012) LiDAR surveys. Seasonal climate data of more than 40 years are analyzed to detect trends. Precipitation and discharge data of two extreme events in 2011 and 2012 that triggered slope-type debris flows are examined in detail. The moved sediment masses are quantified and related to the precipitation record.

  7. It's time to Rework the Blueprints: Building a Science for Clinical Psychology

    ERIC Educational Resources Information Center

    Millon, Theodore

    2003-01-01

    The aims in this article are to connect the conceptual structure of clinical psychological science to what the author believes to be the omnipresent principles of evolution, use the evolutionary model to create a deductively derived clinical theory and taxonomy, link the theory and taxonomy to comprehensive and integrated approaches to assessment,…

  8. Water as Rural Heritage: Reworking Modernity through Resource Conflict in Edwards County, Kansas

    ERIC Educational Resources Information Center

    Solis, Patricia

    2005-01-01

    Conflicts over changing uses of natural resources are familiar within communities of the Western US and are usually resolved through legal processes. This paper analyzes resource conflict through juxtaposing impact analyses often used in their juridical resolution with discourse analyses of affected rural communities. The purchase of property by a…

  9. Managing Spaces: (Re)working Relations of Strategy and Spatiality in Vocational Education and Training

    ERIC Educational Resources Information Center

    Mulcahy, Dianne

    2007-01-01

    The adoption of a more "open" national training market in vocational education and training (VET) in Australia has led to considerable changes in VET organizations and considerable challenges for VET managers. Recent research has established the critical role that 'strategy' plays in leading and managing these organizations and the significance of…

  10. Reworked old crust-derived shoshonitic magma: The Guarany pluton, Northeastern Brazil

    NASA Astrophysics Data System (ADS)

    Ferreira, Valderez P.; Sial, Alcides N.; Pimentel, Marcio M.; Armstrong, Richard; Guimarães, Ignez P.; da Silva Filho, Adejardo F.; de Lima, Mariucha Maria C.; da Silva, Thyego R.

    2015-09-01

    The 572 Ma Guarany stock consists of magmatic epidote-bearing hornblende monzodiorite to biotite granite that intruded Paleoproterozoic orthogneisses about 10 km inland from the coast in northeastern Brazil. Co-magmatic diorite enclaves and dikes are abundant throughout the pluton. The monzodiorite-granite pluton and diorite enclaves are shoshonitic and display continuous trends in variation diagrams. They display chemical and isotopic characteristics of crustal melts, such as enrichment in incompatible elements, high back-calculated initial 87Sr/86Sr ratios (avg. 0.71253), negative εNd (0.57Ga) values (avg. - 14.58), as well as high and variable (+ 9.1 to + 11.1‰VSMOW) δ18O (zircon) values. Correlations between O-isotope and whole-rock silica contents, as well as initial 87Sr/86Sr ratios with 1/Sr concentrations, suggest hybridization of a lower continental crustal melt with more felsic crustal rocks, concomitant with fractional crystallization. Amphibole chemistry and whole rock Zr, TiO2 and P2O5 contents suggest magma solidification at a pressure ~ 7 kbar and near liquidus temperature ~ 900 °C. The parental magma was likely formed by partial melting of old (tDM = 2.0 Ga) amphibolitic lower continental crustal rocks, in a post-collisional setting, probably triggered by underplating of mantle-derived mafic magma during the period of relaxation after collision.

  11. Recent research on the Chesapeake Bay impact structure, USA - Impact debris and reworked ejecta

    USGS Publications Warehouse

    Horton, J.W., Jr.; Aleinikoff, J.N.; Kunk, M.J.; Gohn, G.S.; Edwards, L.E.; Self-Trail J.M.; Powars, D.S.; Izett, G.A.

    2005-01-01

    Four new coreholes in the western annular trough of the buried, late Eocene Chesapeake Bay impact structure provide samples of shocked minerals, cataclastic rocks, possible impact melt, mixed sediments, and damaged microfossils. Parautochthonous Cretaceous sediments show an upward increase in collapse, sand fluidization, and mixed sediment injections. These impact-modifi ed sediments are scoured and covered by the upper Eocene Exmore beds, which consist of highly mixed Cretaceous to Eocene sediment clasts and minor crystalline-rock clasts in a muddy quartz-glauconite sand matrix. The Exmore beds are interpreted as seawater-resurge debris flows. Shocked quartz is found as sparse grains and in rock fragments at all four sites in the Exmore, where these fallback remnants are mixed into the resurge deposit. Crystalline-rock clasts that exhibit shocked quartz or cataclastic fabrics include felsites, granitoids, and other plutonic rocks. Felsite from a monomict cataclasite boulder has a sensitive high-resolution ion microprobe U-Pb zircon age of 613 ?? 4 Ma. Leucogranite from a polymict cataclasite boulder has a similar Neoproterozoic age based on muscovite 40Ar/39Ar data. Potassium-feldspar 40Ar/39Ar ages from this leucogranite show cooling through closure (???150 ??C) at ca. 261 Ma without discernible impact heating. Spherulitic felsite is under investigation as a possible impact melt. Types of crystalline clasts, and exotic sediment clasts and grains, in the Exmore vary according to location, which suggests different provenances across the structure. Fractured calcareous nannofossils and fused, bubbled, and curled dinofl agellate cysts coexist with shocked quartz in the Exmore, and this damage may record conditions of heat, pressure, and abrasion due to impact in a shallow-marine environment. ?? 2005 Geological Society of America.

  12. Reworking the science curriculum: A case study in the interdependence between introductory biology and multiculturalism

    NASA Astrophysics Data System (ADS)

    Persell, Roger

    1994-12-01

    Multiculturalism has emerged as the major influence in revising science curricula and teaching, yet misunderstanding about the history and theoretical underpinnings of multiculturalism has made the separation of political and education reform contentious and difficult. Within the context of a new college-wide pluralism and diversity requirement, a large introductory biology course at Hunter College of the City University of New York is now the testing ground for an interdependent model of multicultural education. The implications for multiculturalism, science pedagogy, and the pivotal role of introductory courses are discussed.

  13. The Volumetric Impact of Biogenic Sediment Reworking on the Geomorphology and Shallow Stratigraphy of Barrier Islands

    NASA Astrophysics Data System (ADS)

    Grimes, Z. T.; Buynevich, I. V.; Darrow, J. S.; Seminack, C. T.; Griffis, N.

    2010-12-01

    In addition to physical processes operating along the dynamic, sand-dominated coastal landforms, biogenic activity affects their unconsolidated surfaces in a variety of ways, displacing large volumes of sediment and partially modifying their morphological elements. This is particularly well pronounced on isolated coastal landforms, such as several barrier islands along the U.S. Mid-Atlantic Coast and Sable Island (Canada), where populations of native and introduced organisms have a confined range of activity. Diverse communities of vertebrates (ungulates, carnivores, wading birds, and reptiles) produce well-pronounced trails (trampled areas) or extend into regions of mobile fine-to-coarse sand. Large ungulates, such as horses, deer, and wild boar not only leave deep hoofprint structures in sand (1-5 cm, depending on substrate properties), but can easily penetrate and dislocate substantial portions of thin soil horizons. For example, beyond their grazing impact on vegetation, several hundred feral horses on Assateague Island (Maryland-Virginia, USA) disturb sections of beach, dune, and shallow saltmarsh through compaction and displacement of surface sediment. Given hoofprint diameters of 8-12 cm, partial track and trackway overlap, and an uninterrupted activity period of only 1 hour/day, anywhere from 100 to more than 1200 m3 of sand may be affected by this population on a daily basis. The compaction alters the geomechanical properties of the sediment, particularly along partially saturated intertidal areas. On steeply sloping dunes, which may be traversed numerous times by several individuals, grainflows are common, often leading to partial collapses of the dune slope. In addition to vertebrate trampling and burrowing (e.g., turtle nests), large invertebrates produce distinct bioturbation structures in the upper 0.5-1.0 m of barrier sands. A single ghost crab burrow in the backshore region may attain 4-5 cm in diameter, resulting in the removal and shifting of 3,500 cm3 of sand. Such biogenic structures not only affect the primary physical formations along beach, dune, and washover sequences, but also create interference patterns on high-resolution geophysical images. Due to a dielectric contrast between air-filled cavities (~1) and the surrounding sediment (~5-30), such techniques as ground-penetrating radar are being increasingly applied to identify and map biogenic structures in order to assess the impact of the biota on substrate integrity and slope stability in terrestrial and coastal settings.

  14. Chinese-Thai Transmigrants: Reworking Identities and Gender Relations in Thailand and the United States.

    ERIC Educational Resources Information Center

    Bao, Jiemin

    1999-01-01

    Analyzes how Chinese-Thai transmigrants are shaped by social categories and simultaneously shape themselves, first in Thailand and then after migration to the United States. These immigrants cannot be understood as a singular essence. They want to be Chinese, Thai, and American simultaneously. (SLD)

  15. Implementation of Title V requirements at an aerospace manufacturing and rework facility

    SciTech Connect

    Stark, W.T.; Ayers, M.F.; Reed, J.T.

    1998-12-31

    The Clean Air Act Amendments of 1990 forced many sources to apply for permits and be subject to both state and federal oversight through the operating permit programs implemented under Title V. In order to comply with new permit provisions, many sources were forced to develop and implement complex programs that would both ensure compliance and allow maximum operating flexibility. Although no material tracking or reporting system existed before the Learjet facility became subject to Title V, careful planning and use of the proper tools and procedures allowed the implementation of a facility-wide data management and compliance reporting system that is not process dependent, allows maximum operating flexibility, and adds relatively few inconveniences to operations personnel. Also, as new requirements become effective in the coming years, the flexibility of the system allows it to be easily modified by facility personnel.

  16. CEBAF energy upgrade program including re-work of CEBAF cavities

    SciTech Connect

    Joseph Preble

    2008-02-12

    The Thomas Jefferson National Accelerator Facility, Jefferson Lab, is planning an upgrade of the CEBAF accelerator from a maximum energy of 6 GeV to 12 GeV and from 3 to 4 experimental halls. This paper will discuss the plans for upgrading the energy of the machine which requires improvements of the existing Super Conducting Radio Frequency (SRF) cryomodules and the additions of ten newly designed high performance SRF cryomodules.

  17. No Work Like Rework: Issues in the Design of a Math Test Sign-Up Application

    ERIC Educational Resources Information Center

    Alkadi, Ghassan; Beaubouef, Theresa

    2012-01-01

    This paper introduces a test sign-up application developed for a math department at a university. The requirements, design, and final software product are presented, along with one very important unexpected problem that arose after completion of the work--the system to be implemented and maintained by the client was not compatible with the…

  18. Emplacement and reworking of the Marampa Group allothchon, northwestern Sierra Leone, West Africa

    NASA Astrophysics Data System (ADS)

    Latiff, R. S. A.; Andrews, J. R.; Wright, L. I.

    1997-10-01

    The structural evolution and relative age of the Precambrian Marampa Group, a 60 km wide north-northwest trending fold thrust belt is described in detail. The Marampa Group is shown to be unconformably overlain by the Rokel River Group which lies immediately to the east and is separated by a major crustal shear zone from gneisses and amphibolites of the Kasila Group to the west. Previous workers have interpreted the fold thrust belt as a klippe of the adjacent Kasila Group derived from the west or as an autochthonous volcano-sedimentary deposit engulfed by granitic. basement. Ages ranging from 500 to > 2700 Ma have been suggested. Evidence is presented to show that the important deformation of the Marampa Group clearly predates the deposition of the Rokel River Group and must represent a significant earlier orogenic event. Constraints on the relationship of this older deformation to the 2700-2750 Ma deformation of the Kasila Group are discussed. The earliest structures consist of flat lying thrusts which transported Marampa Group metasediments, with or without their basal metavolcanic formation, eastward from their source basin over the basin margin and onto a flanking heterogeneously deformed older granitic gneiss basement. Subsequent intrusion of megacrystic, now porphiyroclastic granites was followed by a major period of crustal extension during which sediments and volcanics of the Rokel River Group were deposited in rift basins. Renewed east-west crustal shortening ascribed to the Pan-African event inverted earlier extensional structures thrusting the Rokel River Group westward over -the Marampa Group and leading to local facing confrontations where east dipping faults were reactivated. The relationship of the Marampa Group to the greenstone belts of Guinea, Liberia and Sierra Leone remains unresolved.

  19. Reworked pyroclastic beds in the early Miocene of Patagonia: Reaction in response to high sediment supply during explosive volcanic events

    NASA Astrophysics Data System (ADS)

    Cuitiño, José I.; Scasso, Roberto A.

    2013-05-01

    Two meter-scale pyroclastic levels are interbedded within the early Miocene succession of the Estancia 25 de Mayo (Patagoniense transgression) and Santa Cruz formations in the foreland Austral (or Magallanes) Basin, Argentina. The Lower Pyroclastic Level (LPL) is a tabular body interbedded within offshore marine deposits, laterally continuous for 30 km and varying in thickness from few centimeters to around 4 m. Grain-size grades from coarse to extremely fine ash with upward-fining along with a northeastern-fining trends. Structureless fine to very fine tuffs dominate and rare parallel laminations are the only tractive sedimentary structures. The Upper Pyroclastic Level (UPL) lies within low energy fluvial deposits and is laterally discontinuous, and it is composed by lenticular bodies reaching a maximum of 15 m thick and 100 m wide, with a concave-up base and a plane top. Grain-size range is similar to the LPL but it coarsens upward. The lower portion of the UPL shows parallel lamination, current ripple lamination and mud drapes with large pumice lapilli and plant debris, whereas the upper portion shows parallel lamination and trough cross-stratification. Both pyroclastic levels are composed mainly of pumice grains and glass shards with minor proportions of quartz and plagioclase crystals and lithic fragments. The LPL shows no mixing with epiclastic material whereas the UPL shows an upward increase in epiclastic material, and an upward increment in the scale of cross-bedding. The large thickness in relation to the possible emission center and the content of plant debris of the LPL does not suggest a direct, submarine, ash-fallout origin. The LPL is interpreted as a deposit of hyperpycnal-flows generated at the coastal zone when tephra-laden rivers plunged into the ocean. Large amounts of well preserved plant debris support the hypothesis of a terrestrial source of the sediments. The UPL is entirely composed of tractive deposits, so an ash fallout origin is disregarded. This, together with the lenticular shape and the alluvial plain origin of the encasing sediments, suggests accumulation within fluvial channels. Cycles of upper-flow-regime parallel lamination, current-ripple lamination and mud drapes at the lower portion, suggest short-lived turbulent flows that initially filled semi-abandoned channels. They were followed by sheet floods and channel reactivation, expressed by large-scale cross-bedding. The low degree of particle mixing observed in both levels is explained by the inability of streams to erode the substrate as they are suddenly over-saturated with pyroclastic sediments during and after the eruption. The grain-size distribution of the LPL and geochemical data indicate a contemporaneous volcanic source located to the west/southwest in the Andean ranges, where the South Patagonian Batholith is presently located. Explosive volcanism deeply modifies "normal" sedimentary dynamics.

  20. WASTE MINIMIZATION ASSESSMENT FOR A MANUFACTURER OF NEW AND REWORKED ROTOGRAVURE PRINTING CYLINDERS (EPA/600/S-95/005)

    EPA Science Inventory

    The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack the expertise to do so. Waste Minimization Assessment Centers (WMACs) were established at selected u...

  1. Last millennium gravity reworking processes in the western Gulf of Corinth: correlations with historical seismicity and indication of earthquake clusters

    NASA Astrophysics Data System (ADS)

    Beckers, Arnaud; Beck, Christian; Hubert-Ferrari, Aurélia; Papatheodorou, George; Reyss, Jean-Louis

    2016-04-01

    The western tip of the Corinth Rift is considered as the most active within this major extensional structure, as evidenced by: seismicity, GPS kinematics, and INSAR data (Bernard et al., 2006). Within the frame of a multidisciplinary project dedicated to seismic hazards assessment for this region, two offshore surveys - high resolution seismic reflection and gravity coring - were conducted in this area. They were dedicated to the Late Quaternary sedimentary fill as the latter was expected to record both long term deformation (Beckers et al., 2015) and sedimentary "events" related to major earthquakes and/or tsunamis. Seismic reflection imaging displays the time and geographical distributions of large submarine landslides (MTDs) during the last 100 kyr. Based on a morpho-sedimentary map and the active fault pattern, up to 2 m-long cores were selected to detect and characterize the possible impact of historical events. The chronological control is based on AMS 14C dating and four detailed 210Pb and 137Cs profiles. Sedimentation (components, sources, transport and settling mechanisms) was analysed through textural, chemical, and mineralogical parameters. Turbidites could be clearly separated from the hemipelagic deposits. Our attempt to correlate identified sedimentary "events" with historical data greatly benefited from a recently elaborated catalog (Albini et al., 2014) with precisely re-located epicentral areas. Cable breaks were also taken into account. Attenuation models (Papazachos & Papaioannou's, 1997) were used to discuss paleo-intensities vs. distance form epicentral areas. From the whole set of cores, the following results may be underlined: - the correlations between cores from the different sites are not complete, including for a few neighbouring sites belonging to the same morpho-sedimentary unit; we relate these discrepancies to the complex bottom morphology and/or to bottom currents responsible for local erosion; - for several well-documented earthquakes and tsunamis, we could not find a clearly recorded sedimentary impact; - non earthquake-triggered MTDs (as the 1963 event) produced specific layers identical to the major earthquakes impacts. At the difference, for a few cores from the deep axial floor, several sandy or silty turbidites permit to establish correlations: i) between coring sites, ii) with earthquakes which stroke two different areas, respectively east and west of the concerned part of the Gulf. Furthermore, the sedimentary events show a particular time distribution for the last 600 yr: - two intervals with short recurrences: a recent one (~1900 AD-Present or ~1750 AD-Present) and an older one (~1550 AD-1700 AD or ~1450 AD-1800 AD); these time distributions differ from each coring site; - a long "quiet" period (150 to 200 yr). From these results, we tentatively consider this sedimentary record as an indicator of a migration of seismogenic faulting activity. Ref.: Albini, P., et al., 2014. Techn. Rep. I.N.G.V. Roma. Beckers, A., et al., 2015. Marine Geology, 360:55-69 Bernard, P., et al., 2006. Tectonophysics, 426:7-30. Papazachos, C., Papaioannou, C., 1997. Journal of Seismology, 1:181-201.

  2. Reworking of School Principals' Roles in the Context of Educational Privatization: A View from Ukraine

    ERIC Educational Resources Information Center

    Kovalchuk, Serhiy; Shchudlo, Svitlana

    2014-01-01

    Educational privatization created new arrangements for funding, provision, and regulation of educational systems and their various stakeholders worldwide. This qualitative study examines the driving forces of privatization in the public education of Ukraine, focusing specifically on the professional roles of school principals who have been…

  3. Burning peat and reworking loess contribute to the formation and evolution of a large Carolina-bay basin

    NASA Astrophysics Data System (ADS)

    Rodriguez, Antonio B.; Waters, Matthew N.; Piehler, Michael F.

    2012-01-01

    Carolina bays are nearly ubiquitous along ~ 1300 km of the North American Atlantic Coastal Plain, but relatively few bays have been examined in detail, making their formation and evolution a topic of controversy. The Lake Mattamuskeet basin, eastern North Carolina, USA, is a conglomeration of multiple Carolina bays that form a > 162 km2 lake. The eastern shoreline of the lake is made up of a 2.9-km-wide plain of parabolic ridges that recorded rapid shoreface progradation. The lower shoreface deposit contains abundant charcoal beds and laminae dated 6465-6863 cal yr BP, corresponding with initiation of a lacustrine environment in the eastern part of the lake. A core from the western part of the lake sampled a 1541-1633 cal yr BP charcoal bed at the base of the lacustrine unit, indicating formation of this part of the basin postdates the eastern basin. Lake Mattamuskeet has no relationship to the Younger Dryas or a linked impact event because rim accretion significantly postdates 12,000 cal yr BP. The shoreline progradation, and association of charcoal beds with the oldest lake sediment in both main parts of the basin, suggest that fire and subsequent hydrodynamic processes were associated with initial formation of these Carolina bays.

  4. Reworking Practice through an AfL Project: An Analysis of Teachers' Collaborative Engagement with New Assessment Guidelines

    ERIC Educational Resources Information Center

    Hermansen, Hege; Nerland, Monika

    2014-01-01

    In recent years, the concept of Assessment for Learning (AfL) has travelled across countries, giving rise to a range of educational policy initiatives and school development projects. While researchers have focused on issues such as how formative assessment can support student learning and lead to more efficient classroom practices, less attention…

  5. The Precambrian of Transangaria, Yenisei Ridge (Siberia): Neoproterozoic microcontinent, Grenville-age orogen, or reworked margin of the Siberian craton?

    NASA Astrophysics Data System (ADS)

    Kuzmichev, Alexander B.; Sklyarov, Eugene V.

    2016-01-01

    The Yenisei Ridge was traditionally perceived as an uplifted segment of the western Siberian craton affected by Neoproterozoic collision events. However, the suggestions for Archaean or Palaeoproterozoic ('Siberian') basement in Transangaria have not been confirmed by reliable geochronological data. A new view regards most of the Ridge, namely, its Transangarian segment, to be an exotic Neoproterozoic terrane that collided with Siberia in the late Neoproterozoic. This paper presents new U-Pb SHRIMP zircon ages demonstrating that Archaean rocks (2611 ± 12 Ma) actually exist in this territory. We also provide a review of published U-Pb zircon ages for igneous and metamorphic rocks of Transangaria together with our new age data. This geochronological dataset clarifies the geology of the Yenisei Ridge and leads to new conclusions, as follows. (1) It is likely that Transangaria was originally underlain by an Archaean-Palaeoproterozoic basement, similar to that of the Siberian craton. (2) Geochronological data do not confirm the idea of widespread "Greenvillian age" granitoides in Transangaria. (3) The Neoproterozoic evolution of the Yenisei Ridge segment of the Siberian craton margin includes the following events. (i) Collision of an unidentified terrane with the western margin (in recent coordinates) of the Siberian craton during 900-855 Ma. The colliding terrane is no longer present in the current structure. (ii) Dextral shearing during 830-800 Ma may have been caused by counter-clockwise rotation of the Siberian craton. (iii) Extensional conditions prevailed during 800-700 Ma. The Isakovka oceanic basin formed at this time interval. (iv) Thrusting of the Isakovka island arc and accretionary prism onto the Siberian margin occurred during the late Neoproterozoic (650-630 Ma) and caused high-pressure metamorphism.

  6. A two-dimensional, time-dependent model of suspended sediment transport and bed reworking for continental shelves

    USGS Publications Warehouse

    Harris, C.K.; Wiberg, P.L.

    2001-01-01

    A two-dimensional, time-dependent solution to the transport equation is formulated to account for advection and diffusion of sediment suspended in the bottom boundary layer of continental shelves. This model utilizes a semi-implicit, upwind-differencing scheme to solve the advection-diffusion equation across a two-dimensional transect that is configured so that one dimension is the vertical, and the other is a horizontal dimension usually aligned perpendicular to shelf bathymetry. The model calculates suspended sediment concentration and flux; and requires as input wave properties, current velocities, sediment size distributions, and hydrodynamic sediment properties. From the calculated two-dimensional suspended sediment fluxes, we quantify the redistribution of shelf sediment, bed erosion, and deposition for several sediment sizes during resuspension events. The two-dimensional, time-dependent approach directly accounts for cross-shelf gradients in bed shear stress and sediment properties, as well as transport that occurs before steady-state suspended sediment concentrations have been attained. By including the vertical dimension in the calculations, we avoid depth-averaging suspended sediment concentrations and fluxes, and directly account for differences in transport rates and directions for fine and coarse sediment in the bottom boundary layer. A flux condition is used as the bottom boundary condition for the transport equation in order to capture time-dependence of the suspended sediment field. Model calculations demonstrate the significance of both time-dependent and spatial terms on transport and depositional patterns on continental shelves. ?? 2001 Elsevier Science Ltd. All rights reserved.

  7. River discharge controlling a tidal delta: the interplay between monsoon input and tidal reworking in SW Bangladesh

    NASA Astrophysics Data System (ADS)

    Hale, R. P.; Goodbred, S. L., Jr.; Bain, R. L.; Wilson, C.; Best, J.; Reed, M. J.

    2015-12-01

    The Ganges-Brahmaputra-Meghna River system (GBM) is among the world's largest in terms of both annual water and sediment discharge. The subaerial delta (110,000 km2) is home to ~160 million people, in addition to the ecologically and economically critical Sundarbans National Forest (SNF). Recent sediment budgets suggest that ~15% of the 1 x 109 t yr-1 sediment load carried by the GBM is subsequently advected along shore and inland via tidal activity, to the otherwise-abandoned SW portion of the delta. A unit-scale estimate based on observed offshore suspended sediment concentrations (SSC) >1.0 g L-1 suggests that sufficient sediment is available in the system to maintain the elevation of the subaerial delta plain, even under current relative sea-level-rise rates. Recent work measuring sedimentation within SNF corroborates this finding, and understanding these sediment delivery dynamics will be critical for protecting the future of nearby regions that are heavily populated, but drastically altered by human activities. Cross-channel hydrodynamic surveys were conducted to estimate what fraction of the water (and sediment) is diverted from the major tidal channels toward the SNF interior. Measurements including profiles of velocity and SSC were collected on spring and neap tides during the dry and monsoon seasons, along transects bracketing major conduit channels into the SNF. During the dry season, we observe water flux at the southern end of the study area to be in approximate equilibrium regardless of tidal range, with SSC <0.3 g L-1 during neap tides, and <1.0 g L-1 during spring tides. North of the SNF conduit channels, we observe equilibrium water discharge and similarly low SSC during neap tides, but a modest ebb dominance and surface SSC >1.0 g L-1 during spring tides. This suggests the possibility of additional inputs of water and sediment from an adjacent tidal channel, as well as a potential source for the deposition observed on the Sundarbans platform during spring-tide flooding. Within channels in SNF, near-bed SSC increase by >5x from neap to spring tides, to a peak of ~1.0 g L-1. Sediment grab samples collected in a distributary channel show a moderate fining trend with distance from the major conduit, which has implications for the sedimentation rates observed on the tidal delta plain.

  8. The Bir Safsaf Precambrian inlier of South West Egypt revisited. A model for ~ 1.5 Ga T DM late Pan-African granite generation by crustal reworking

    NASA Astrophysics Data System (ADS)

    Bea, F.; Montero, P.; Anbar, M. Abu; Molina, J. F.; Scarrow, J. H.

    2011-08-01

    Bir Safsaf is one of the four Precambrian inliers of the southern Egyptian Western Desert; it is located midway between the juvenile crust of the Arabian-Nubian Shield and the Archean terranes of Gebel Kamil, near the Libyan border. Contrary to previous belief, Bir Safsaf is exclusively composed of late Pan-African granitoids, with U/Pb SHRIMP ages between 627 Ma and 595 Ma. The presence of pre-Pan-African materials is limited to scarce inherited zircons with ~ 2.1 Ga and ~ 2.7 Ga, ages that are well-represented in the pre-Pan-African terranes of the neighboring Gebel Kamil inlier. Early Pan-African inherited zircons with ages of ~ 640-650 Ma and ~ 750 Ma are also found. The granitoids of Bir Safsaf show a large geochemical variability, with an overall composition similar to subduction-related granites, but they lack the inter-elemental correlations characteristic of magmatic differentiation, magma mixing or hybridization. This chemically heterogeneous set of granitoids has, nonetheless, nearly uniform initial 87Sr/ 86Sr and 143Nd/ 144Nd, and a ~ 1.5 Ga Nd model age (T DM) despite no new crust being formed at that time in northeast Africa. To reconcile the large chemical variability, the isotopic homogeneity, and the "mixed" Nd model age, we propose that these granitoids were derived from a lithologically heterogeneous pre-Pan African source that, prior to melting, was thoroughly homogenized with respect to Sr and Nd isotopes by convective metasomatism caused by juvenile hydrothermal fluids probably released from a subduction zone.

  9. Geothermal energy development in the eastern United States: technical assistance report no. 5. Geothermal space heating-naval air rework facility, Norfolk, Virginia. [Aircraft hangers

    SciTech Connect

    Hill, F.K.; Henderson, R.W.

    1980-06-01

    The electronic integration hangar, designated LP-167, was selected for study, as it was a single-story building with a large floor area. Because of the high ceiling and the sliding doors necessary to admit aircraft, the heat loss rate, based on floor area, was about twice that of commercial buildings. It was furnished with an oil-fired hot water heating system capable of high thermal output to meet heating requirements in the coldest weather. On the basis of the known characteristics of geothermal sources for the Atlantic Coastal Plain, and wells drilled and assayed in the Norfolk area, a reasonable estimate of the parameters of a well drilled at NARF was made. This included a low temperature output from the well of only 107/sup 0/F, so that direct transfer of warm water between the wellhead heat exchanger (HX) and the hot water radiating system in the building was not practical. Four design options are explored and calculations are presented on each one.

  10. Tectono-metamorphic evolution of the internal zone of the Pan-African Lufilian orogenic belt (Zambia): Implications for crustal reworking and syn-orogenic uranium mineralizations

    NASA Astrophysics Data System (ADS)

    Eglinger, Aurélien; Vanderhaeghe, Olivier; André-Mayer, Anne-Sylvie; Goncalves, Philippe; Zeh, Armin; Durand, Cyril; Deloule, Etienne

    2016-01-01

    The internal zone of the Pan-African Lufilian orogenic belt (Zambia) hosts a dozen uranium occurrences mostly located within kyanite micaschists in a shear zone marking the contact between metasedimentary rocks attributed to the Katanga Neoproterozoic sedimentary sequence and migmatites coring domes developed dominantly at the expense of the pre-Neoproterozoic basement. The P-T-t-d paths reconstructed for these rocks combining field observations, microstructural analysis, metamorphic petrology and thermobarometry and geochronology indicate that they have recorded burial and exhumation during the Pan-African orogeny. Both units of the Katanga metasedimentary sequence and pre-Katanga migmatitic basement have underwent minimum peak P-T conditions of ~ 9-11 kbar and ~ 640-660 °C, dated at ca. 530 Ma by garnet-whole rock Lu-Hf isochrons. This suggests that this entire continental segment has been buried up to a depth of 40-50 km with geothermal gradients of 15-20 °C.km- 1 during the Pan-African orogeny and the formation of the West Gondwana supercontinent. Syn-orogenic exhumation of the partially molten root of the Lufilian belt is attested by isothermal decompression under P-T conditions of ~ 6-8 kbar at ca. 530-500 Ma, witnessing an increase of the geothermal gradients to 25-30 °C·km- 1. Uranium mineralizations that consist of uraninite and brannerite took place at temperatures ranging from ~ 600 to 700 °C, and have been dated at ca. 540-530 Ma by U-Pb ages on uraninite. The main uranium deposition thus occurred at the transition from the syn-orogenic burial to the syn-orogenic exhumation stages and has been then partially transposed and locally remobilized during the post-orogenic exhumation accommodated by activation of low-angle extensional detachment.

  11. Potential geothermal energy use at the Naval Air Rework Facilities, Norfolk, Virginia and Jacksonville, Florida, and at the naval shipyard, Charleston, South Carolina

    SciTech Connect

    Costain, J.K.; Glover, L. III; Newman, R.W.

    1984-05-01

    The feasibility of geothermal energy use at naval installations in Norfolk, VA, Jacksonville, FL, and Charleston, SC was assessed. Geophysical and geological studies of the above areas were performed. Engineering and economic factors, affecting potential energy use, were evaluated. The Norfolk and Jacksonville facilities are identified as candidates for geothermal systems. System costs are predicted. Economic benefits of the proposed geothermal systems are forecast, using the net present value method of predicting future income.

  12. Work First. How To Implement an Employment-Focused Approach to Welfare Reform. A How-to Guide. ReWORKing Welfare. Technical Assistance for States and Localities.

    ERIC Educational Resources Information Center

    Brown, Amy

    This guide, which is intended for planners, administrators, and staff involved in state and local welfare reform efforts, summarizes information about the "work first" approach to welfare reform that was gained from comprehensive evaluations of work first programs and discussions with program managers, practitioners, and participants. The…

  13. Geoinformatic and geophysical methods for evaluation of deposition and reworking of sediments with contaminants in floodplain of the Ploucnice River, Czech Republic

    NASA Astrophysics Data System (ADS)

    Elznicova, Jitka; Matys Grygar, Tomas; Kiss, Timea; Babek, Ondrej; Popelka, Jan; Plotnarek, Lukas; Tumova, Stepanka; Majerova, Lucie; Hosek, Michal

    2014-05-01

    Complex study for the deposition and remobilization of pollutants in floodplain of the Ploucnice River requires geoinformatic, geomorphologic, geophysical and geochemical knowledge. Geoinformatic tools are usable in several science disciplines. Photogrammetric methods are a big tool for land-use change development and digital surface model (DSM) reconstruction. The historical photographs from 1938 till 1994 were orthorectified using ERDAS 2013 LPS software. Historical and actual orthophotos were used to study the channel migration of the Ploucnice River and lateral shifts of the channel in the last 70 years. Historical digital surfer model, which is reconstructed from historical orthophotos with 60% overlaps, were used for 3D visualisation of historical landscape and shows land-use changes. Accurate digital elevation model (DEM) from laser scanning dataset was created for geomorphological analysis. Topography was analysed with GIS methods and the geomorphologic interpretation was then performed. The subsurface architecture of the floodplain and distribution of the sediment bodies were studied using electrical resistivity tomography (ERT). The Wenner-Schlumberger method with 104 electrodes in a single array was used. An inverse model resistivity section was produced from the apparent resistivity pseudosection by the least-square inversion method using RES2DINV software (Geotomo Software, Malaysia). The contamination of the floodplain was analysed with both field and laboratory instruments. The portable gamma-spectrometer DISA 400A was used for acquisition of the total surface gamma activity in field. Several hundreds of soil samples (from drill cores) and recent flood deposits (after 2013 flood) were analysed by laboratory X-ray fluorescence spectrometer to describe deposition and remobilization of pollutants in floodplain, of which most important are Ba, Ni, Pb, U and Zn. Geostatistical analysis was used for creation of a statistically valid prediction surface. The map of distribution of the surface gamma activity and map for contribution of pollutants after flood in the spring 2013were interpolated.

  14. Upwelling-driven reworking of a MTD's fine-grained plume: an example at the Cariaco Basin/Cariaco Gulf connection.

    NASA Astrophysics Data System (ADS)

    Aguilar, Iliana; Beck, Christian; Audemard, Franck; Crouzet, Christian; Sabatier, Pierre; Develle, Anne-Lise; Boussafir, Mohammed; Campos, Corina

    2016-04-01

    The Cariaco Basin is a 1400 m-deep and 90 km-wide pull-apart basin, in the south-eastern corner of the Caribbean Sea. To the East, it is connected to the Cariaco Gulf, a 60 km-long, 15 km-wide, and 90 m-deep appendix. Both are E-W elongated and developed upon the south-eastern transform boundary of the Caribbean Plate, an active limit here mainly represented by the El Pilar Fault. The Gulf of Cariaco entrance is a 55 m-deep, and 5 km-wide sill mainly controlled by the large Manzanares River delta, which western foreset slope is facing the Basin's eastern edge. Within this connection area, two particular sedimentary processes have been previously documented: 1) strong seasonal upwelling responsible for the transfer of deep particulate organic matter from the Basin into the Gulf; 2) the recent occurrence, in the Basin, of a fine-grained suspension related to a submarine landslide; this event was detected after the 1997 Cariaco earthquake (Thunell et al., 1999; Lorenzoni et al., 2012) and was related to a slope failure of the Manzanares delta western foreset. From short gravity cores retrieved in the Gulf, we analysed the last millennium of sedimentation (components, transport and settling processes) using classical proxies and physical properties. All parameters led to underline: - a permanent mixed provenance of particulate Organic Matter in the main part of the Gulf: i) in situ and ii) allochtonous; - the occurrence of coarse siliciclastic layers related to flooding from the southern edge of the Gulf; - the occurrence of one peculiar fine-grained siliciclastic layer with a widespread distribution, dated around 1850 AD; - an abrupt increase of open marine influence just after the above-mentioned layer. Concerning the "background" permanent sedimentation, these results confirm the importance of upwelling through the connection between the Gulf and the Basin (transfer of the "allochtonous" O.M.). For the fine-grained silicilastic "event", we could discard a consequence of flooding from the Manzanares River. We rather envisage an upwelling-driven suspension brought from the Basin and dispersed into the Gulf. We tentatively relate the genesis of this peculiar load to a mechanism similar to what was described for the 1997 event. A major earthquake-triggered tsunami occurred in 1853 in the concerned area, related to a MTD. We thus propose to correlate this peculiar layer with the 1853 event. Due to this earthquake and the associated tsunami, the upwelling transported fined-grained siliciclastics removed from the western slope of the Manzanares delta. Such a combination of a MTD-generated plume with the permanent upwelling may have occurred several times since the establishment of the connection during the post-MIS2 sea-level rise (Van Daele et al., 2011). The resulting specific layers may thus be used for paleo-earthquakes/paleo-tsunamis detection; furthermore, several major MTDs were imaged on high resolution seismic profiles across the concerned connecting area (Aguilar et al., 2015). Ref.: Aguilar, I., et al., 2015. Comptes Rendus Geoscience, in press. Lorenzoni, L., et al., 2012. Marine Geology, 307:105-110. Thunell, R., 1999. Nature, 398:233-236. Van Daele, M., et al., 2011, Marine Geology 279:37-51.

  15. Beyond Work First: How To Help Hard-To-Employ Individuals Get Jobs and Succeed in the Workforce. A How-To Guide. ReWORKing Welfare: Technical Assistance for States and Localities.

    ERIC Educational Resources Information Center

    Brown, Amy

    This guide distills lessons from an extensive body of research into practical advice for policymakers and practitioners concerned with helping hard-to-employ individuals find jobs and succeed in the work force. Part 1 examines the following topics: characteristics of the hard-to-employ; the prevalence of various barriers to employment; and the…

  16. Zircon Lu-Hf isotopes and granite geochemistry of the Murchison Domain of the Yilgarn Craton: Evidence for reworking of Eoarchean crust during Meso-Neoarchean plume-driven magmatism

    NASA Astrophysics Data System (ADS)

    Ivanic, Timothy J.; Van Kranendonk, Martin J.; Kirkland, Christopher L.; Wyche, Stephen; Wingate, Michael T. D.; Belousova, Elena A.

    2012-09-01

    New in situ Lu-Hf data on zircons from GSWA geochronology samples has provided a unique isotopic dataset with a high temporal resolution for the Murchison Domain of the Yilgarn Craton in Western Australia. These data identify extended periods of juvenile mantle input (positive ɛHf values) into the crust firstly at c. 2980 Ma and then from c. 2820 Ma to c. 2640 Ma with significant pulses of crustal recycling at c. 2750 Ma and c. 2620 Ma (highly negative ɛHf values). Geochemical data from well-characterised granitic suites of the Murchison Domain provide additional constraints on the crustal evolution of the area and indicate a prolonged period of crustal melting and remelting at progressively shallower depths from c. 2750 to c. 2600 Ma. At c. 2760-2753 Ma, widespread calc-alkaline, intermediate to silicic volcanic rocks of the Polelle Group were erupted, accompanied by intrusion of felsic to intermediate melts derived from a variety of crustal sources that likely formed by partial mixing with basaltic melts. The intrusive rocks include a wide geochemical array of rocks in the Cullculli and Eelya suites that were sourced over a wide range of crustal depths. At this time a major departure to negative ɛHf values (<-5) occurred, indicating sampling of c. 3.80 Ga model aged source rocks as well as continued juvenile input. Post-volcanic granitic rocks emplaced between c. 2710 and c. 2600 Ma show geochemical evidence for progressive fractionation through time and derivation from an evolving crustal source. We interpret the driving force for this protracted history of mantle and crustal melting to be two mantle plumes at 2.81 and 2.72 Ga. These data document the process of cratonization through progressive melt depletion of the lower crust, progressively fractionating and shallower melts, culminating with a final phase of crustal recycling (ɛHf < - 5) and the cessation of juvenile input at c. 2630-2600 Ma during intrusion of the Bald Rock Supersuite, resulting in cratonization of this part of the Yilgarn Craton.

  17. Covering Cavities by Electrodeposition

    NASA Technical Reports Server (NTRS)

    Schmeets, M.; Duesberg, J.

    1986-01-01

    Reworking technique allows complex surfaces to be reshaped. Contours of large machined parts reworked quickly and inexpensively by electrodeposition and machining, with little risk of damage. Reworking method employs simple, reliable, well-known procedures.

  18. Re-work: a new Japanese support system for reinstatement.

    PubMed

    Soeda, Shuji

    2016-09-01

    Re-work is a new treatment technique that follows the conventional Japanese approach, which includes rest and pharmacotherapy. The aim of re-work is to prevent repeated sick leave by helping individuals reflect on the reasons behind the sick leave and improve stress-related coping skills. Re-work participants prepare in an environment similar to their workplaces at a medical institution or a specialised public facility for several months before returning to work. As re-work is undertaken via group work, this has benefits beyond those which can be achieved by an individual alone. The reinstatement effects of re-work are now starting to be verified. Issues of interest for re-work include its unified concept-based programme, and the need to further verify its clinical efficacy and cost-effectiveness. PMID:26677732

  19. 75 FR 35454 - Agency Information Collection Activities; Submission to OMB for Review and Approval; Comment...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-22

    ... Request; Aerospace Manufacturing and Rework Industry Information Request Questionnaire; EPA ICR Number... the facilities and their basic design and operating features, quantity of air emissions,...

  20. 40 CFR 63.7985 - Am I subject to the requirements in this subpart?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... CFR part 63. Affiliated operations include, but are not limited to, mixing or dissolving of coating... Rework Facilities), KK (National Emission Standards for the Printing and Publishing Industry),...

  1. 40 CFR 63.7985 - Am I subject to the requirements in this subpart?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... CFR part 63. Affiliated operations include, but are not limited to, mixing or dissolving of coating... Rework Facilities), KK (National Emission Standards for the Printing and Publishing Industry),...

  2. NASA-DoD Lead-Free Electronics Project

    NASA Technical Reports Server (NTRS)

    Kessel, Kurt

    2007-01-01

    The primary technical objective of the project is to undertake comprehensive testing to generate information on failure modes/criteria to better understand the reliability of: Packages (e.g., TSOP, BGA, PDIP) assembled and reworked with lead-free alloys Packages (e.g., TSOP, BGA, PDIP) assembled and reworked with mixed (lead/lead-free) alloys.

  3. 78 FR 68054 - Information Collection Request Submitted to OMB for Review and Approval; Comment Request; NESHAP...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-13

    .... Public comments were previously requested via the Federal Register (78 FR 33409), on June 4, 2013 during... for Aerospace Manufacturing and Rework Facilities (Renewal) AGENCY: Environmental Protection Agency... collection request (ICR), ``NESHAP for Aerospace Manufacturing and Rework Facilities (40 CFR Part 63,...

  4. Reduction of construction wastes by improving construction contract management: a multinational evaluation.

    PubMed

    Mendis, Daylath; Hewage, Kasun N; Wrzesniewski, Joanna

    2013-10-01

    The Canadian construction industry generates 30% of the total municipal solid waste deposited in landfills. Ample evidence can be found in the published literature about rework and waste generation due to ambiguity and errors in contract documents. Also, the literature quotes that disclaimer clauses in contract documents are included in the contractual agreements to prevent contractor claims, which often cause rework. Our professional practice has also noted that there are several disclaimer clauses in standard contract documents which have the potential to cause rework (and associated waste). This article illustrates a comparative study of standard contractual documents and their potential to create rework (and associated waste) in different regions of the world. The objectives of this study are (1) to analyse standard contractual documents in Canada, the USA and Australia in terms of their potential to generate rework and waste, and (2) to propose changes/amendments to the existing standard contract documents to minimise/avoid rework. In terms of construction waste management, all the reviewed standard contract documents have deficiencies. The parties that produce the contract documents include exculpatory clauses to avoid the other party's claims. This approach tends to result in rework and construction waste. The contractual agreements/contract documents should be free from errors, deficiencies, ambiguity and unfair risk transfers to minimise/avoid potential to generate rework and waste. PMID:23836104

  5. Acid Test For Annealing Of Welds

    NASA Technical Reports Server (NTRS)

    Deese, Gary E.; Ellgass, Joseph P.

    1989-01-01

    Solution changes color if heat-treated condition lost. Simple test indicates whether welded joint retained its postweld heat-treated condition after reworking including rewelding and grinding. Test used instead of Rockwell or Brinell hardness tests when reworked surface inaccessible to hardness-testing apparatus or when small surface imperfections created by apparatus unacceptable.

  6. 78 FR 49996 - Pipeline Safety: Periodic Updates of Regulatory References to Technical Standards and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... diameter (e.g., no rework material is allowed for pipe two inches Iron Pipe Size (IPS) and below in diameter and the requirements in ASTM D2513-09a, section 4.2 would be acceptable for pipe larger than two... rework. Smaller diameter pipe (two-inch IPS and less), however, has proven to be more susceptible to...

  7. 75 FR 82333 - Airworthiness Directives; McDonnell Douglas Corporation Model DC-10-10, DC-10-10F, and MD-10-10F...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-30

    ... Policies and Procedures (44 FR 11034, February 26, 1979), and 3. Will not have a significant economic... crack and structural reinforcement. For permanently and temporarily repaired areas, the service rework... crack and structural reinforcement. For permanently repaired areas, the service rework drawing...

  8. Speaking Habermas to Gramsci: Implications for the Vocational Preparation of Community Educators

    ERIC Educational Resources Information Center

    Bamber, John; Crowther, Jim

    2012-01-01

    Re-working the Gramscian idea of the "organic" intellectual from the cultural-political sphere to Higher Education (HE), suggests the need to develop critical and questioning "counter hegemonic" ideas and behaviour in community education students. Connecting this reworking to the Habermasian theory of communicative action, suggests that these…

  9. Effect of Rolling Bearing Refurbishment and Restoration on Bearing Life and Reliability

    NASA Technical Reports Server (NTRS)

    Zaretsky, Erwin V.; Branzai, Emanuel V.

    2005-01-01

    For nearly four decades it has been a practice in commercial and military aircraft application that rolling-element bearings removed at maintenance or overhaul be reworked and returned to service. The work presented extends previously reported bearing life analysis to consider the depth (Z(45)) to maximum shear stress (45) on stressed volume removal and the effect of replacing the rolling elements with a new set. A simple algebraic relationship was established to determine the L(10) life of bearing races subject to bearing rework. Depending on the extent of rework and based upon theoretical analysis, representative life factors (LF) for bearings subject to rework ranged from 0.87 to 0.99 the lives of new bearings. Based on bearing endurance data, 92 percent of the bearing sets that would be subject to rework would result in L(10) lives equaling and/or exceeding that predicted for new bearings with the remaining 8 percent having the potential to achieve the analytically predicted life of new bearings when one of the rings is replaced at rework.. The potential savings from bearing rework varies from 53 to 82 percent that of new bearings depending on the cost, size and complexity of the bearing.

  10. Replacing ODCs in a Critical Hand Cleaning Manual Electronics Assembly Operation

    NASA Technical Reports Server (NTRS)

    Bonner, J. K.; Walton, Sharon

    1997-01-01

    The manufacture of high reliability electronics assemblies for spacecraft and ground support equipment still often involves manual assembly processes. In addition, rework and repair of critical assemblies aslo often entails manual assembly processes.

  11. Mud, Macrofauna and Microbes: An ode to benthic organism-abiotic interactions at varying scales

    EPA Science Inventory

    Benthic environments are dynamic habitats, subject to variable sources and rates of sediment delivery, reworking from the abiotic and biotic processes, and complex biogeochemistry. These activities do not occur in a vacuum, and interact synergistically to influence food webs, bi...

  12. Building America Top Innovations 2013 Profile – Quality Management System Guidelines

    SciTech Connect

    none,

    2013-09-01

    This Top Innovation profile describes quality management system tools that were customized for residential construction by BSC, IBACOS, and PHI, for use by builders, trades, and designers to help eliminate mistakes that would require high-cost rework.

  13. BLDG F101, FRONT ELEVATION Naval Magazine Lualualei, Headquarters Branch, ...

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

    BLDG F101, FRONT ELEVATION - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhall Building Types, Eighteenth Street & Fence Road near Hastings Street intersection, Pearl City, Honolulu County, HI

  14. BLDG 8, VIEW OF NE SIDE LOOKING THRU SE DRIVE ...

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

    BLDG 8, VIEW OF NE SIDE LOOKING THRU SE DRIVE THROUGH. - Naval Magazine Lualualei, West Loch Branch, Ammo Rework Building, North of Fourth Street near intersection with B Avenue, Pearl City, Honolulu County, HI

  15. BLDG A250, ACCESS DRIVE ON EAST SIDE FROM SOUTH ENTRY. ...

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

    BLDG A250, ACCESS DRIVE ON EAST SIDE FROM SOUTH ENTRY. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-fourth & Iwo Jima Streets intersection, Pearl City, Honolulu County, HI

  16. BLDG 250, WEST END ENTRY AND NORTH SIDE OF BLDG. ...

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

    BLDG 250, WEST END ENTRY AND NORTH SIDE OF BLDG. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-second Street between Jamestown & Iwo Jima Streets, Pearl City, Honolulu County, HI

  17. BLDG 250, FROM BERM/BLAST WALL ON NORTH SIDE OF BLDG. ...

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

    BLDG 250, FROM BERM/BLAST WALL ON NORTH SIDE OF BLDG. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-second Street between Jamestown & Iwo Jima Streets, Pearl City, Honolulu County, HI

  18. BLDG F102, INTERIOR VIEW. Naval Magazine Lualualei, Headquarters Branch, ...

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

    BLDG F102, INTERIOR VIEW. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhall Building Types, Eighteenth Street & Fence Road near Hastings Street intersection, Pearl City, Honolulu County, HI

  19. BLDG F101, NORTH END AND REAR (EAST) SIDE. Naval ...

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

    BLDG F101, NORTH END AND REAR (EAST) SIDE. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhall Building Types, Eighteenth Street & Fence Road near Hastings Street intersection, Pearl City, Honolulu County, HI

  20. BLDG F101, FRONT ELEVATION W/POLE Naval Magazine Lualualei, Headquarters ...

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

    BLDG F101, FRONT ELEVATION W/POLE - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhall Building Types, Eighteenth Street & Fence Road near Hastings Street intersection, Pearl City, Honolulu County, HI

  1. BLDG 250, OVERVIEW SHOWING BERMS AND BLAST WALLS. Naval ...

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

    BLDG 250, OVERVIEW SHOWING BERMS AND BLAST WALLS. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-second Street between Jamestown & Iwo Jima Streets, Pearl City, Honolulu County, HI

  2. BLDG A250, NORTH SIDE SHOWING DOUBLE ACCESS Naval Magazine ...

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

    BLDG A250, NORTH SIDE SHOWING DOUBLE ACCESS - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-fourth & Iwo Jima Streets intersection, Pearl City, Honolulu County, HI

  3. BLDG F101, SOUTH END AND FRONT (WEST). F102 IN BACKGROUND. ...

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

    BLDG F101, SOUTH END AND FRONT (WEST). F102 IN BACKGROUND. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhall Building Types, Eighteenth Street & Fence Road near Hastings Street intersection, Pearl City, Honolulu County, HI

  4. BLDG 250, WEST SIDE ENTRY W/POLE. Naval Magazine Lualualei, ...

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

    BLDG 250, WEST SIDE ENTRY W/POLE. - Naval Magazine Lualualei, Headquarters Branch, Ammo Rework-Overhaul Building, Forty-second Street between Jamestown & Iwo Jima Streets, Pearl City, Honolulu County, HI

  5. NASA DOD Lead Free Electronics Project

    NASA Technical Reports Server (NTRS)

    Kessel, Kurt R.

    2008-01-01

    The primary'technical objective of this project is to undertake comprehensive testing to generate information on failure modes/criteria to better understand the reliability of: Packages (e.g., Thin Small Outline Package [TSOP], Ball Grid Array [BGA], Plastic Dual In-line Package [PDIPD assembled and reworked with lead-free alloys Packages (e.g., TSOP, BGA, PDIP) assembled and reworked with mixed (lead/lead-free) alloys.

  6. Lightweight Tool Grinds Back-Side Weld Beads

    NASA Technical Reports Server (NTRS)

    Gallagher, Robert L.

    1994-01-01

    Air-powered grinder enables high-quality rework of welds. Tool removes excess material from back side of weld in preparation for reworking. Used on workpiece while workpiece still mounted in welding fixture or welding machine. Then rewelded in original position, so full process control maintained. Used for grinding material in spaces to which access limited, such as in pressure vessels and in hulls of ships. Also used to grind materials other than metals.

  7. NASA-DoD Lead-Free Electronics Project

    NASA Technical Reports Server (NTRS)

    Kessel, Kurt R.

    2009-01-01

    The primary technical objective of this project is to undertake comprehensive testing to generate information on failure modes/criteria to better understand the reliability of: (1) Packages (e.g., Thin Small Outline Package [TSOP], Ball Grid Array [BGA], Plastic Dual In-line Package [PDIP]) assembled and reworked with lead-free alloys, (2) Packages (e.g., TSOP, BGA, PDIP) assembled and reworked with mixed (lead/lead-free) alloys.

  8. Fossils out of sequence: Computer simulations and strategies for dealing with stratigraphic disorder

    SciTech Connect

    Cutler, A.H.; Flessa, K.W. )

    1990-06-01

    Microstratigraphic resolution is limited by vertical mixing and reworking of fossils. Stratigraphic disorder is the degree to which fossils within a stratigraphic sequence are not in proper chronological order. Stratigraphic disorder arises through in situ vertical mixing of fossils and reworking of older fossils into younger deposits. The authors simulated the effects of mixing and reworking by simple computer models, and measured stratigraphic disorder using rank correlation between age and stratigraphic position (Spearman and Kendall coefficients). Mixing was simulated by randomly transposing pairs of adjacent fossils in a sequence. Reworking was simulated by randomly inserting older fossils into a younger sequence. Mixing is an inefficient means of producing disorder; after 500 mixing steps stratigraphic order is still significant at the 99% to 95% level, depending on the coefficient used. Reworking disorders sequences very efficiently: significant order begins to be lost when reworked shells make up 35% of the sequence. Thus a sequence can be dominated by undisturbed, autochthonous shells and still be disordered. The effects of mixing-produced disorder can be minimized by increasing sample size at each horizon. Increased spacing between samples is of limited utility in dealing with disordered sequences: while widely separated samples are more likely to be stratigraphically ordered, the smaller number of samples makes the detection of trends problematic.

  9. Evidencing syn-sedimentary volcanism in volcaniclastic series using coupled sedimentological and geochronological (U-Pb/zircon) analyses

    NASA Astrophysics Data System (ADS)

    Rossignol, Camille; Poujol, Marc; Bourquin, Sylvie; Dabard, Marie-Pierre; Hallot, Erwan; Nalpas, Thierry

    2015-04-01

    Volcaniclastic sediments, often under-studied, constitute an important part of the global sedimentary record, both in marine and continental environments. These sediments are of particular importance in order to constrain the age of sedimentation, particularly in series where interbedded lava flow are absent. Volcaniclastics sediments are also used in order to constrain the duration of the volcanic activity and to link volcanism with a specific geodynamic context. To demonstrate that volcanism and sedimentation were contemporaneous in a given basin, it is crucial to determine to which extent volcaniclasts present in the volcaniclastic sediments have been reworked. However, this determination is notoriously difficult. As a case study, we characterized the Triassic volcaniclastic series from the Luang Prabang Basin, Laos, using coupled sedimentological and geochronological analyses. Sedimentological and petrographical analyses show a wild range of depositional environments (alluvial fan, braided river and alluvial plain) and evidence for reworking of the volcaniclastics in each of the corresponding deposits. U-Pb geochronology conducted on zircon grains extracted from the volcaniclastic samples of known stratigraphic position indicates that the maximum depositional ages get younger together with the sedimentary succession. This good correlation between absolute ages and stratigraphy demonstrates that, despite evidences of reworking, the volcaniclasts were produced, at least to some extent, contemporaneously with sedimentation. Then, in this specific example, the uncertainties obtained from the U-Pb ages can be used to indicate the 'reworking time scale', defined as the difference between the age of volcaniclast production and the depositional age of its host strata. Short reworking time scales, of ca. 1 Ma, one order of magnitude smaller than the total duration of the sedimentary record reveal that volcanism and sedimentation were contemporaneous. The use of coupled

  10. The impact of diamond extraction on natural denudation rates in the Diamantina Plateau (Minas Gerais, Brazil)

    NASA Astrophysics Data System (ADS)

    Barreto, Helen N.; Varajão, César A. C.; Braucher, Régis; Bourlès, Didier L.; Salgado, André A. R.; Varajão, Angélica F. D. C.

    2014-12-01

    The 10Be method was used to investigate the effect of mining activities on the natural denudation rates in alluvial sediments from catchments of the Southern Espinhaço Range (SER) in Minas Gerais State (Brazil). In this region, which is predominantly composed of quartzites, the 10Be concentrations were measured in alluvial sediments from catchments in a preserved natural area of the Serra do Cipó National Park and on the Diamantina Plateau, which was subjected to diamond extraction from beginnings of XVIII century until the end of the XX. Two types of drainage were identified in the Diamantina Plateau area: (i) reworked drainage (alluvial sediments reworked by panning) and (ii) overloaded drainage (alluvial sediments originating from panning processes on saprolites located upstream). The mean denudation value for the natural drainages (˜4.4 m.My-1) is similar to that of the reworked drainages (˜4.3 m.My-1) However, the denudation rates obtained for eleven samples from three sites in overloaded basins range from ˜6.4 m My-1 to ˜22.8 m My-1 and are thus higher than those determined for the reworked and natural basins. These results show that despite the alluvium deposits have been intensely reworked by panning, the values of denudation rates were not changed, they are similar to denudation rates from the natural drainages. However, the natural rates are lower than those affected by panning processes on saprolites.

  11. A change in the geodynamics of continental growth 3 billion years ago.

    PubMed

    Dhuime, Bruno; Hawkesworth, Chris J; Cawood, Peter A; Storey, Craig D

    2012-03-16

    Models for the growth of continental crust rely on knowing the balance between the generation of new crust and the reworking of old crust throughout Earth's history. The oxygen isotopic composition of zircons, for which uranium-lead and hafnium isotopic data provide age constraints, is a key archive of crustal reworking. We identified systematic variations in hafnium and oxygen isotopes in zircons of different ages that reveal the relative proportions of reworked crust and of new crust through time. Growth of continental crust appears to have been a continuous process, albeit at variable rates. A marked decrease in the rate of crustal growth at ~3 billion years ago may be linked to the onset of subduction-driven plate tectonics. PMID:22422979

  12. Dynamic monitoring of avalanches and barchan dune morphology change at different timescales

    NASA Astrophysics Data System (ADS)

    Nield, Joanna; Wiggs, Giles; Baddock, Matthew; Hipondoka, Martin

    2016-04-01

    Aeolian dune morphology responds dynamically to changing wind conditions. The lee slope avalanche dynamics of dunes are particularly sensitive to prior morphological conditions as well as the varying intensity and duration characteristics of sand transport events. Here we use terrestrial laser scanning (TLS) to measure dune surface change over minutes, hours, a week and a year during conditions of variable approach flow resulting in considerable lee slope reworking. Several different avalanche patterns are recognised that can be related to slope characteristics, wind direction and slope reworking. We find that during oblique winds, horn reworking can reduce the lee slope angle. When the dominant, formative winds of the barchan return, the reworked lee slope, perpendicular to the prior oblique wind, takes longer to start avalanching. In the central region of the dune, avalanche frequency and the extent of lee slope reworking depends on wind speed. Under high winds from the dominant direction, there is continual erosion near the dune brink central area, due to the exceedance of a critical angle of repose, whilst under weaker winds the frequency of grainfall sedimentation and avalanches diminishes and net deposition in the brink area is more common. During the week of measurements, changes to the crest-brink area and lee slope form are considerable, based on the reworking of the slope by avalanche events, and this ultimately influences the dune migration rate. Over the course of a year, we demonstrate that the shape of the barchan stoss and lee slopes can change significantly, whilst the overall dune size and general planform is maintained. Our findings help elucidate dune mobility mechanics and pattern modifications at the wind storm event scale.

  13. Oxidation of detrital pyrite as a cause for Marcasite Formation in marine lag deposits from the Devonian of the eastern US

    NASA Astrophysics Data System (ADS)

    Schieber, Juergen

    2007-06-01

    Late Devonian black shale successions in the eastern US contain numerous discontinuities that are characterized by lags containing variable amounts of quartz sand mixed with reworked pyritic and phosphatic debris. These lags can be partially cemented by iron sulfides with a radial fibrous to massive morphology. Examination of iron sulfide cements via electron backscatter diffraction (EBSD) shows that these cements can consist entirely or partially of marcasite. It is proposed here that oxidation and dissolution of reworked pyrite debris led to favorable conditions for intermittent rapid marcasite formation by forcing a substantial pH drop in the surface sediment and by raising dissolved iron concentrations in the pore waters.

  14. Pain, sympathy and the medical encounter between the mid eighteenth and the mid twentieth centuries

    PubMed Central

    Bourke, Joanna

    2014-01-01

    Witnessing people in pain inevitably elicits anxiety in physicians and other caregivers. Physicians are often required to inflict certain types of discomforts in order to alleviate other, more destructive, pains. Accusations that physicians lacked sympathy can be heard throughout the centuries. This article explores the diverse medical responses to such claims between the eighteenth and twentieth centuries. It interrogates changing definitions of clinical sympathy. The concept of sympathy was continually being reworked for each generation of medical professional. Crucially, in this reworking, philosophers (such as Adam Smith) and physicians came into dialogue. Cultures of sympathy were understood in both physiological and metaphorical terms, and were tied to changing notions of professionalization PMID:24489439

  15. Maceral, total organic carbon, and palynological analyses of ross ice shelf project site j9 cores.

    PubMed

    Wrenn, J H; Beckman, S W

    1982-04-01

    Analyses of macerals and total organic carbon indicate that the low organic content of core sediments from Ross Ice Shelf Project site J9 has been selectively reduced further, probably by postdepositional submarine oxidation. Palynological analysis revealed a reworked Paleogene dinocyst flora of low diversity (the transantarctic flora). This constitutes the most southerly dinocyst flora reported thus far. The antarctic distribution of the transantarctic flora supports the existence of a transantarctic strait during the Paleogene. The J9 sporomorph assemblage also is reworked and Paleogene in age. PMID:17736253

  16. In Situ Robotic Inspection Of Welds

    NASA Technical Reports Server (NTRS)

    Van Wyk, Lisa M.; Garcia, Raul C., Jr.; Gilbert, Jeffrey L.

    1992-01-01

    Automated system reduces delays in inspection and rework. System reduces inspection-and-rework delay from days to hours. Path of inspection sensors taken directly from welding path saving time in programming for inspection. Inspection data stored so not lost as inspection equipment turned off. Same robot welding workpiece used to inspect it. In preparation, welding tool mounted on end effector of robot replaced with eddy-current or ultrasonic sensor. Robot recalls welding path from memory and retraces it, recording sensor output as it proceeds.

  17. Tales of Recombinant Femininity: "The Reincarnation of Golden Lotus," the "Chin P'ing Mei," and the Politics of Melodrama in Hong Kong.

    ERIC Educational Resources Information Center

    Fore, Steve

    1993-01-01

    Examines the film "The Reincarnation of Golden Lotus" and the text upon which it is loosely based, the "Chin P'ing Mei," and the relationship between it and modern Chinese culture. States that the film's screenplay is much less an adaptation of the source novel than it is a female-centered reworking of a particular narrative and thematic elements.…

  18. 78 FR 27010 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-09

    ...We are superseding two existing airworthiness directives (AD) that apply to certain The Boeing Company Model 737-100, -200, -200C, - 300, -400, and -500 series airplanes. Those ADs, for certain airplanes, currently require repetitive inspections of the flap track of the wing outboard flap, and corrective actions if necessary; and eventual rework of the flap track assembly and rear spar......

  19. 77 FR 11019 - Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-24

    ... Federal Register published on April 11, 2000 (65 FR 19477-78). Discussion The European Aviation Safety... also estimate that it would take about 5 work-hours per engine to perform one inspection, and about 8 work-hours per engine to perform the rework. The average labor rate is $85 per work-hour. Based...

  20. Adorno and the Borders of Experience: The Significance of the Nonidentical for a "Different" Theory of "Bildung"

    ERIC Educational Resources Information Center

    Thompson, Christiane

    2006-01-01

    In this essay Christiane Thompson discusses the systematic outcomes of Theodor Adorno's philosophical work for a reworked theory of "Bildung" (an important term in the German tradition of philosophy and history of education). In his essay "Theory of 'Halbbildung,'" Adorno revealed the inevitable failure of "Bildung," on the one hand, and the…

  1. Cultivating Disruptive Subjectivities: Interrupting the New Professionalism

    ERIC Educational Resources Information Center

    Herr, Kathryn

    2015-01-01

    This paper explores the everyday enactments of new public management in our professional lives utilizing principles of self-ethnography. Drawing on the reworking of an Action Research class, I explore the possibilities of a contextual analysis of the workplace to make more transparent the enactment of new public management. Little is known…

  2. Alternative Ways of Expressing and Reading Identity

    ERIC Educational Resources Information Center

    Higgins, Jane; Nairn, Karen; Sligo, Judith

    2009-01-01

    This paper explores the use of an "anti-CV" (anti-Curriculum Vitae), or identity portfolio, as a data collection instrument in research with young people. We analyse four visually based anti-CVs created by participants in a project on youth transitions, exploring their use of symbolism and space to show how these young people reworked public…

  3. The Living and the Dead in Education: Commentary on Julian Williams

    ERIC Educational Resources Information Center

    Jones, Peter E.

    2011-01-01

    Jean Lave and Ray McDermott (2002) did a service with their powerful reading of Marx's 1844 essay on "Estranged Labour" (Marx, 1964). In reworking Marx's critique of "alienated labour" in terms of "alienated learning," they reminded everyone of Marx's own impassioned revolt against the inhumanity of the capitalist order and found a novel way of…

  4. "We Could Think of Things That Could Be Science": Girls' Re-Figuring of Science in an Out-Of-School-Time Club

    ERIC Educational Resources Information Center

    Gonsalves, Allison; Rahm, Jrène; Carvalho, Alice

    2013-01-01

    Grounded in sociocultural theory, this study explores how the figured world of science is reworked through a series of multi-media activities that were introduced into a girls-only conversation club in an after school program for Teens. The study is part of a multi-sited ethnography in which we explored youths' engagement with science within…

  5. Laser geodynamic satellite thermal/optical/vibrational analyses and testing, volume 2, book 1 technical report. [retroreflector performance

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The results are presented of a retroreflector performance improvement program. The following areas of the program are discussed: retroreflector dimensional verification, initial optical performance analysis, LAGEOS test retroreflector rework, final optical performance analysis, optical performance tests, evaluations and conclusions, and laser wavelength evaluation and dihedral angle selection. Data tables, diagrams, graphs, and photographs are included.

  6. New Tales for Old: Folktales as Literary Fictions for Young Adults.

    ERIC Educational Resources Information Center

    de Vos, Gail; Altmann, Anna E.

    Focusing on reworkings of tales from the European oral folk tradition, this book shows educators how to use these tales effectively in the high school and middle school curriculum. The first chapter of the book, "Folktales and Literary Fictions" looks at the nature of folktales, their place in contemporary North American culture, and the…

  7. Education and Women's Work: Some New Research Directions.

    ERIC Educational Resources Information Center

    Gaskell, Jane

    1983-01-01

    Discusses the school-work relationship for women, noting that pertinent research traditions (occupational status attainment research, human capital research) have focused on men and male-female differences. Suggests reworking the models to focus on male-female differences in education (academic achievement, course choices, school socialization).…

  8. Advanced manufacturing development of a composite empennage component for L-1011 aircraft. Phase 4: Full scale ground test

    NASA Technical Reports Server (NTRS)

    Jackson, A. C.; Dorwald, F.

    1982-01-01

    The ground tests conducted on the advanced composite vertical fin (ACVF) program are described. The design and fabrication of the test fixture and the transition structure, static test of Ground Test Article (GTA) No. 1, rework of GTA No. 2, and static, damage tolerance, fail-safe and residual strength tests of GTA No. 2 are described.

  9. 77 FR 36224 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ... 12866; 2. Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034... aluminum sheets; modifying the lights assembly on the tail boom rear movable fairing; and replacing the....] * * * * * The required actions include installing or reworking, as applicable, metallic diverters and...

  10. Testing Gimbal Axes Before Complete Assembly

    NASA Technical Reports Server (NTRS)

    Babis, W.

    1986-01-01

    Early testing increases chances assembly will function well without expensive rework. Developed for antenna gimbals, test eliminates delay and costs ensued when fully assembled antenna fails because of excessive torque and friction in gimbal. Gimbal housing mounted above rotary table. Gimbal axis tested connected to torque transducer on table. With exception of special holder for gimbal housing, all of testing instruments commercially available items.

  11. Funding Phantom Students

    ERIC Educational Resources Information Center

    Roza, Marguerite; Fullerton, Jon

    2013-01-01

    Many state education leaders are taking a fresh look at school finance in hopes of containing costs. Some are reworking transportation formulas, or zeroing in on special education eligibility, or merging districts. Others are investing more in digital learning, charter innovations, and information systems. But state leaders too often overlook a…

  12. Spatial patterns of scour and fill in dryland sand bed streams 1843

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Spatial patterns of scour and fill in two dryland ephemeral stream channels with sandy bed material have been measured with dense arrays of scour chains. Although the depth and areal extent of bed activity increased with discharge, active bed reworking at particular locations within the reaches res...

  13. Showdown Shapes Up Over Pollution Laws

    ERIC Educational Resources Information Center

    Chemical and Engineering News, 1974

    1974-01-01

    Discusses technological, legislative, and administrative problems facing the implementation of the 1972 air and water pollution control acts. Indicates that a congressional reworking on the pollution laws appears to be in the offing which could lead to a softening of environmental deadlines and a change in spending for pollution controls. (CC)

  14. "Without Contraries Is No Progression": Dust as an All-Inclusive, Multifunctional Metaphor in Philip Pullman's "His Dark Materials."

    ERIC Educational Resources Information Center

    Bird, Anne-Marie

    2001-01-01

    Draws on Milton's "Paradise Lost" and on motifs found within Gnostic mythology and the poetry of William Blake to explore how Philip Pullman reworks the Judeo-Christian myth of the Fall in his trilogy, "His Dark Materials." Finds at its center "Dust": a conventional metaphor for human physicality in which good and evil, and spirit and matter…

  15. Grinding Away Microfissures

    NASA Technical Reports Server (NTRS)

    Booth, Gary N.; Malinzak, R. Michael

    1990-01-01

    Treatment similar to dental polishing used to remove microfissures from metal parts without reworking adjacent surfaces. Any variety of abrasive tips attached to small motor used to grind spot treated. Configuration of grinding head must be compatible with configurations of motor and workpiece. Devised to eliminate spurious marks on welded parts.

  16. The Learning-Focused Transformation of Biology and Physics Core Courses at the U.S. Air Force Academy

    ERIC Educational Resources Information Center

    Sagendorf, Kenneth; Noyd, Robert K.; Morris, D. Brent

    2009-01-01

    An institution-wide focus on deep learning has made significant changes in the biology and physics core course curriculum at the U.S. Air Force Academy. The biology course director has reworked course objectives to reflect the learning-focused approach to teaching, while the physics curriculum has adopted new learning outcomes and ways to…

  17. Hybrid Doctoral Program: Innovative Practices and Partnerships

    ERIC Educational Resources Information Center

    Alvich, Dori; Manning, JoAnn; McCormick, Kathy; Campbell, Robert

    2012-01-01

    This paper reflects on how one mid-Atlantic University innovatively incorporated technology into the development of a hybrid doctoral program in educational leadership. The paper describes a hybrid doctoral degree program using a rigorous design; challenges of reworking a traditional syllabus of record to a hybrid doctoral program; the perceptions…

  18. 262. SENIOR OFFICER'S QUARTERS A, 194041. GEORGE A FULLER AND ...

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

    262. SENIOR OFFICER'S QUARTERS A, 1940-41. GEORGE A FULLER AND CO., DESIGNERS OF THE REWORKING OF A C. 1939 SUMMER COTTAGE INTO THIS NEOCOLONIAL RESIDENCE--THE LARGEST AND FOCAL ELEMENT IN THE SENIOR OFFICERS HOUSING AREA. VIEW FROM THE WEST SHOWING THE ENTRANCE ELEVATION OF QUARTERS A. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  19. Measuring Quality, Framing What We Know: A Critical Discourse Analysis of the Common Inspection Framework

    ERIC Educational Resources Information Center

    Dennis, Carol

    2011-01-01

    In "Measuring quality: framing what we know" I offer a critique of "Success in Adult Literacy, Numeracy and ESOL provision (Success in ALNE)"--a contextualised reworking of the common inspection framework. This document offers a government-sponsored account of what quality means when applied to the teaching of adult language, literacy and…

  20. A BETHNIC BIOASSAY USING TIME-LAPSE PHOTOGRAPHY TO MEASURE THE EFFECT OF TOXICANTS ON THE FEEDING BEHAVIOR OF LUGWORMS (POLYCHAETA:ARENICOLIDAE)

    EPA Science Inventory

    A benthic assay was developed utilizing time-lapse photography to measure the feeding activity of a lugworm, Arenicola cristata. Automated 35 mm cameras were used to record formation of feeding funnels at 12-hour intervals. Substrate surface area reworked by lugworms held under i...

  1. 228. Photocopy of drawing (1976 structural drawing by StearnsRoger Incorporated) ...

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

    228. Photocopy of drawing (1976 structural drawing by Stearns-Roger Incorporated) FACING REWORK FOR THE UMBILICAL MAST, SHEET 511-S13 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  2. 227. Photocopy of drawing (1977 structural drawing by StearnsRoger Incorporated) ...

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

    227. Photocopy of drawing (1977 structural drawing by Stearns-Roger Incorporated) LVXM MODIFICATIONS, FACING REWORK FOR THE UMBILICAL MAST, SHEET 501-S29 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  3. Missed Opportunities: The Subordination of Children in Philip Pullman's "His Dark Materials"

    ERIC Educational Resources Information Center

    Moruzi, Kristine

    2005-01-01

    In the "His Dark Materials" trilogy, Pullman reworks the fall of humanity into an ascent and suggests that ascent into adulthood through sexual experience is the desired goal for children. Although this ascent is accompanied by a radical reconceptualization of life and death, Pullman fails to offer any genuinely new ideas of the world with respect…

  4. Staging an Educated Self: Linguistic Displays of Schooling among Rural Zambian Children

    ERIC Educational Resources Information Center

    Clemensen, Nana

    2015-01-01

    This article explores interpretations of schooling as produced by 6-12-year-old children in a rural Zambian community. Applying linguistic-anthropological analyses of their peer interactions, the author discusses symbolic reworkings of schooling and "educatedness" among children frequently labeled as "slow" or…

  5. Ultrasonic Probe For In Situ Inspection Of Welds

    NASA Technical Reports Server (NTRS)

    Gilbert, Jeffrey L.; Paternoster, Vincent Y.

    1992-01-01

    End effector on welding robot contains ultrasonic transducer detecting such flaws as tungsten inclusions and lack of penetration of weld immediately after weld made, while workpiece still mounted; weld reworked in place, if necessary. Mounted on standard arc-welding torch; same length as long gas cup with electrode.

  6. Shear-Wave Ultrasonic Inspection With A Dry Couplant

    NASA Technical Reports Server (NTRS)

    Willenberg, James D; Van Wyk, Lisa

    1994-01-01

    Automated ultrasonic inspection system includes dry couplant pad attached to ultrasonic transducer. Designed to be mounted on robot arm in automated manufacturing (robotic welding) work cell. Between, during, or after manufacturing operations, robot scans ultrasonic transducer along workpiece. Workpiece reworked in place, if necessary. In principle, computer program controlling inspection overlaid on program controlling welding operations.

  7. A Jester's Guide to Creative See[k]ing across Disciplines

    ERIC Educational Resources Information Center

    Rosen, Diane

    2012-01-01

    For many centuries and in many cultures, jesters recited tales of heroic exploits, but they did more than simply recount past events--they amused, cajoled, and spun tales that transported listeners to the edge of mysterious, unmapped territories. Through the transformative power of play and the imagination, they reworked what was already…

  8. "People in Stockholm Are Smarter than Countryside Folks"--Reproducing Urban and Rural Imaginaries in Film and Life

    ERIC Educational Resources Information Center

    Eriksson, Madeleine

    2010-01-01

    This article explores the celebrated film "The Hunters" (Swedish title: "Jagarna") within the context of the discourse of "Internal Orientalism." By juxtaposing a contemporary Swedish film with historical accounts and contemporary news media, I demonstrate how the film reworks and (re)produces representations of the rural North (Norrland),…

  9. 48 CFR 15.408 - Solicitation provisions and contract clauses.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., travel, computer and consultant services, preservation, packaging and packing, spoilage and rework, and... records as of the cutoff date. These include such costs as preproduction engineering, special plant... charged on your accounting records (e.g., included in production costs as direct engineering...

  10. Global Education Inc.: New Policy Networks and the Neoliberal Imaginary

    ERIC Educational Resources Information Center

    Ball, Stephen J.

    2012-01-01

    Do private and philanthropic solutions to the problems of education signal the end of state education in its "welfare" form? Education policy is being reformed and re-worked on a global scale. Policies are flowing and converging to produce a singular vision of "best practice" based on the methods and tenets of the "neo-liberal imaginary".…

  11. Hydrostatic liquid-bearing for precision gyro

    NASA Technical Reports Server (NTRS)

    Sgambati, R. J.

    1971-01-01

    Unit with 2W power increase and slightly larger overall dimensions performs as well as or better than its gas-bearing counterpart. Liquid-bearings are built by reworking serviceable gas-bearing components /sleeves, endplates, and cylinders/. Hydrostatic bearing is self-centered, requiring no magnetic suspension or centering jewel.

  12. Designing an Australian Indigenous Studies Curriculum for the Twenty-First Century: Nakata's "Cultural Interface", Standpoints and Working beyond Binaries

    ERIC Educational Resources Information Center

    Carey, Michelle; Prince, Michael

    2015-01-01

    We discuss the recent reworking of Murdoch University's Australian Indigenous Studies major. For the discipline to realise its charter of decolonising knowledges about Indigenous peoples, it is necessary to move Indigenous Studies beyond the standard reversalist and unsustainable tropes that valorise romanticised notions of Indigeneity and…

  13. 40 CFR 63.3881 - Am I subject to this subpart?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... vehicles that meet the applicability criteria for aerospace manufacturing and rework (40 CFR part 63...-road vehicle subcategory in plastic parts and products surface coating (40 CFR part 63, subpart PPPP... CFR part 63, subpart IIII) at a facility that meets the applicability criteria in § 63.3081(b). (d)...

  14. The Quest for Holism in Education for Sustainable Development.

    ERIC Educational Resources Information Center

    Stables, Andrew; Scott, William

    2002-01-01

    Sustainable development can remain a regulative ideal for environmental educators with the acknowledgement that it has no absolute legitimation and that human reflexivity remains capable of reworking the cultural traditions that have shaped it. Claims that the quest for holism remains one voice in a continuing dialogue about the environment and…

  15. Irradiation stratigraphy and depositional history of the Apollo 16 double drive tube 60009/10

    NASA Technical Reports Server (NTRS)

    Blanford, G. E.; Blanford, J.; Hawkins, J. A.

    1979-01-01

    We report track density frequency distributions, the fraction of high density grains and minimum track densities for 63, 1 mm wide locations in the Apollo 16 double drive tube 60009/10. From these data we conclude that there are seven irradiation strata in the core. Only one buried reworking zone extending from 50-52 cm was found and it was exposed near the surface from 4.5-9 times 10 to the 6th y with a most probable exposure period of 6 times 10 to the 6th y. There is lack of conclusive data that this zone represents a reworking zone in which case the material below 52 cm most probably was exposed in situ for 4.5 times 10 to the 6th y and developed a reworking zone approximately less than 0.5 cm. The present surface of the core has a reworking zone of 12-13 cm which was exposed from 1.3 times 10 to the 7th to 2.5 times 10 to the 8th y. The best estimate for this exposure period remains the value of approximately less than 1.25 times 10 to the 8th y determined by Bogard and Hirsch (1976). The other strata in the core appear to contain mixtures of various soil types and are not related to in situ depositional events.

  16. Race Moves: Following Global Manifestations of New Racisms in Intimate Space

    ERIC Educational Resources Information Center

    Mishra Tarc, Aparna

    2013-01-01

    This article makes tentative links between abstract global forces and the affective and material reworking of race in intimate spaces of culture and community. Using postcolonial and psychoanalytic resources the article follows enduring manifestations of race as racism surfaces and is mobilized through global shifts of people, ideas and capital.…

  17. 170. GENERAL VIEW DOWN WASP STREET. VIEW SOUTHSOUTHEAST DOWN WASP ...

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

    170. GENERAL VIEW DOWN WASP STREET. VIEW SOUTH-SOUTHEAST DOWN WASP ST. FROM 4TH AVE. SHOWING, FROM LEFT TO RIGHT, BUILDING D-180, 60 (AIR REWORK FACILITY), 458, 419, 418, 416, AND 19-20. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  18. A Chance to Be Like Lance

    ERIC Educational Resources Information Center

    Prouty, Anne

    2004-01-01

    The authors' seventh-grade science curriculum includes a study of nutrition, anatomy, and physiology. Over several years, the authors' teaching partner and herself reworked the nine-week unit to include the Tour de France and the exploits of Lance Armstrong. What makes this unit so engaging for middle school students is that it provides an…

  19. Georgia on Our Minds

    ERIC Educational Resources Information Center

    Skophammer, Karen

    2011-01-01

    Oil pastels offer many advantages. They come in a large range of hues, intensities and values, and they lend themselves to blending and shading in a unique way that no other art medium offers. They can be worked and reworked from day to day by the students without the large mess and cleanup time that oil paints require. An artist whose works are a…

  20. Girlhood, Sexual Violence, and Agency in Francesca Lia Block's "Wolf"

    ERIC Educational Resources Information Center

    Marshall, Elizabeth

    2009-01-01

    This essay examines the representation of adolescent girlhood, sexual violence and agency in Francesca Lia Block's contemporary fairy tale collection "The Rose and The Beast." Focusing specifically on the tale "Wolf," the author provides a literary analysis of how Block draws on and reworks traditional Western fairy tale variants to reintroduce…

  1. Assessment of Robust Learning with Educational Data Mining

    ERIC Educational Resources Information Center

    Baker, Ryan S.; Corbett, Albert T.

    2014-01-01

    Many university leaders and faculty have the goal of promoting learning that connects across domains and prepares students with skills for their whole lives. However, as assessment emerges in higher education, many assessments focus on knowledge and skills that are specific to a single domain. Reworking assessment in higher education to focus on…

  2. Developing a New Computer Game Attitude Scale for Taiwanese Early Adolescents

    ERIC Educational Resources Information Center

    Liu, Eric Zhi-Feng; Lee, Chun-Yi; Chen, Jen-Huang

    2013-01-01

    With ever increasing exposure to computer games, gaining an understanding of the attitudes held by young adolescents toward such activities is crucial; however, few studies have provided scales with which to accomplish this. This study revisited the Computer Game Attitude Scale developed by Chappell and Taylor in 1997, reworking the overall…

  3. Electrochemical Machining Removes Deep Obstructions

    NASA Technical Reports Server (NTRS)

    Catania, Mark J.

    1987-01-01

    Electrochemical machining (ECM) is effective way of removing obstructing material between two deep holes supposed to intersect but do not because of misalignment of drilling tools. ECM makes it possible to rework costly castings otherwise scrapped. Method fast even for tough or hard alloys and complicated three-dimensional shapes.

  4. Developing and Validating Test Items for First-Year Computer Science Courses

    ERIC Educational Resources Information Center

    Vahrenhold, Jan; Paul, Wolfgang

    2014-01-01

    We report on the development, validation, and implementation of a collection of test items designed to detect misconceptions related to first-year computer science courses. To this end, we reworked the development scheme proposed by Almstrum et al. ("SIGCSE Bulletin" 38(4):132-145, 2006) to include students' artifacts and to…

  5. 75 FR 59710 - Agency Information Collection Activities; Submission to OMB for Review and Approval; Comment...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-28

    ... procedures prescribed in 5 CFR 1320.12. On Tuesday, June 22, 2010 (75 FR 35454), EPA sought comments on this... Manufacturing and Rework Industry Information Collection AGENCY: Environmental Protection Agency (EPA). ACTION... and cost. DATES: Additional comments may be submitted on or before October 28, 2010. ADDRESSES:...

  6. Carbonate reservoirs at the Mesozoic-Tertiary unconformity, northeast Spain

    SciTech Connect

    Esteban, M.

    1988-08-01

    Carbonates at the Mesozoic-Tertiary unconformity in northeast Spain show four types/stages of evolution of reservoir properties: karstification, coastal reworking, Miocene organic buildups, and Pliocene burial. Subaerial exposure during Paleogene-early Miocene rifting developed a complex fracture-controlled paleokrast facies, showing up to three evolution levels with well-developed cavern and vuggy porosity (1). During the Miocene, the paleokrast profile was intensively reworked into a variety of breccias, conglomerates, and calcarenites in both alluvial and coastal depositional settings. Gravitational displacement of largely karstified hillsides was common. These reworked paleokarst deposits (2) present excellent reservoir properties. The Miocene formations onlap the karstified Mesozoic and the reworked facies; these formations include coral reefs and foramalgal buildups (3) with primary and secondary porosity. Finally, a late fracture event (attributed to the Pliocene) affected the buried and lithified paleokarst deposits and lower-middle Miocene formations (4). This fracture event is associated with vuggy corrosion, dolomitization, ore mineralization, and leaching of Mesozoic to middle Miocene carbonates. Several horizons with chalky microporosity are also tentatively related to this Pliocene event. These four phases of reservoir evolution are also recognized in northern Morocco and southern Italy.

  7. Offshore Outsourcing Drives Curriculum

    ERIC Educational Resources Information Center

    Swanson, Dewey A.

    2005-01-01

    Introduction to Application Development was completely reworked. Less emphasis was placed on programming and more emphasis on developing and communicating user requirements. Many items used in training industry were incorporated into the CPT 180 course. The paper will detail the change in focus in this course and overall how our curriculum is…

  8. 75 FR 38007 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-01

    ... Federal Register on April 12, 2010 (75 FR 18446). That NPRM proposed to require reworking or replacing... ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), and (3) Will... (BMS) 8-39 polyurethane foam insulation. This proposed AD also results from a report from the...

  9. CH Stands for Cheese, Right? A Swiss Culture Class and the National Standards

    ERIC Educational Resources Information Center

    Seidlitz, Lisa

    2012-01-01

    Culture has always been a part of foreign language learning. However, in recent years, more and more language professors advocate placing culture at the center of our classes. The question of just how to teach culture remains a topic of debate. This paper describes the reworking of a traditional German grammar and reading course into a class that…

  10. Developing a Network of and for Geometric Reasoning

    ERIC Educational Resources Information Center

    Mamolo, Ami; Ruttenberg-Rozen, Robyn; Whiteley, Walter

    2015-01-01

    In this article, we develop a theoretical model for restructuring mathematical tasks, usually considered advanced, with a network of spatial visual representations designed to support geometric reasoning for learners of disparate ages, stages, strengths, and preparation. Through our geometric reworking of the well-known "open box…

  11. 30 CFR 556.72 - Compensatory payments as production.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 2 2012-07-01 2012-07-01 false Compensatory payments as production. 556.72... § 556.72 Compensatory payments as production. If an oil and gas lessee makes compensatory payments and... or by other approved drilling or reworking operations, such payments shall be considered as...

  12. 30 CFR 256.72 - Compensatory payments as production.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Compensatory payments as production. 256.72....72 Compensatory payments as production. If an oil and gas lessee makes compensatory payments and if... by other approved drilling or reworking operations, such payments shall be considered as...

  13. 30 CFR 556.72 - Compensatory payments as production.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 2 2014-07-01 2014-07-01 false Compensatory payments as production. 556.72... § 556.72 Compensatory payments as production. If an oil and gas lessee makes compensatory payments and... or by other approved drilling or reworking operations, such payments shall be considered as...

  14. 30 CFR 556.72 - Compensatory payments as production.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 2 2013-07-01 2013-07-01 false Compensatory payments as production. 556.72... § 556.72 Compensatory payments as production. If an oil and gas lessee makes compensatory payments and... or by other approved drilling or reworking operations, such payments shall be considered as...

  15. Removing Bonded Integrated Circuits From Boards

    NASA Technical Reports Server (NTRS)

    Rice, John T.

    1989-01-01

    Small resistance heater makes it easier, faster, and cheaper to remove integrated circuit from hybrid-circuit board, package, or other substrate for rework. Heater, located directly in polymeric bond interface or on substrate under integrated-circuit chip, energized when necessary to remove chip. Heat generated softens adhesive or solder that bonds chip to substrate. Chip then lifted easily from substrate.

  16. How Reuse Influences Productivity in Object-Oriented Systems

    NASA Technical Reports Server (NTRS)

    Basili, Victor R.; Briand, Lionel C.; Melo, Walcelio L.

    1997-01-01

    Although reuse is assumed to be especially valuable in building high quality software as well as in Object Oriented (OO) development, limited empirical evidence connects reuse with productivity and quality gains. The author's eight system study begins to define such benefits in an OO framework, most notably in terms of reduce defect density and rework as well as in increased productivity.

  17. Action Research and the Assemblage: Engaging Deleuzian Pedagogy and Inquiry beyond the Constraints of the Individual and the Group in Education Settings

    ERIC Educational Resources Information Center

    Gale, Ken

    2014-01-01

    Drawing upon the author's previous attempts to engage the work of Deleuze and Deleuze and Guattari with contemporary pedagogic practices and research, this paper offers a conceptually tentative reworking of the theory and practice of action research, both as a means of challenging antecedent positions and as a way of proposing a volatile and…

  18. "Cirque du Freak."

    ERIC Educational Resources Information Center

    Rivett, Miriam

    2002-01-01

    Considers the marketing strategies that underpin the success of the "Cirque du Freak" series. Describes how "Cirque du Freak" is an account of events in the life of schoolboy Darren Shan. Notes that it is another reworking of the vampire narrative, a sub-genre of horror writing that has proved highly popular with both adult and child readers. (SG)

  19. 40 CFR 63.745 - Standards: Primer and topcoat application operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... in paragraph (c) of this section for those coatings that are uncontrolled (no control device is used... coatings that are controlled (organic HAP emissions from the operation are reduced by the use of a control... topcoat (less water) as applied for general aviation rework facilities. (d) Controlled...

  20. 40 CFR 63.3881 - Am I subject to this subpart?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... vehicles that meet the applicability criteria for aerospace manufacturing and rework (40 CFR part 63...-road vehicle subcategory in plastic parts and products surface coating (40 CFR part 63, subpart PPPP... CFR part 63, subpart IIII) at a facility that meets the applicability criteria in § 63.3081(b). (d)...

  1. 40 CFR 63.4481 - Am I subject to this subpart?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... aerospace manufacturing and rework (40 CFR part 63, subpart GG). (12) Surface coating of plastic parts... CFR part 63, subpart IIII) at a facility that meets the applicability criteria in § 63.3081(b). (17... Coating of Automobiles and Light-Duty Trucks NESHAP (40 CFR part 63, subpart IIII) and you perform...

  2. 40 CFR 63.745 - Standards: Primer and topcoat application operations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... in paragraph (c) of this section for those coatings that are uncontrolled (no control device is used... coatings that are controlled (organic HAP emissions from the operation are reduced by the use of a control... topcoat (less water) as applied for general aviation rework facilities. (d) Controlled...

  3. Preliminary evaluation of hermetic JT/LJT/R P connector socket contact design

    SciTech Connect

    Baca, J.R.F.

    1991-10-01

    This report presents a precursory examination of a number of issues pertaining to socket contacts in hermetic connectors. The principal issues addressed are high-contact resistance and contact chatter (circuit discontinuities). Efforts examining the characteristics of the existing socket contact design, the possibility of connector/contact rework, quick-fix solutions, and contact redesigns are summarized.

  4. Standpoints: Researching and Teaching English in the Digital Dimension

    ERIC Educational Resources Information Center

    Kirkland, David E.

    2009-01-01

    David E. Kirkland argues that our understanding of literate practice in relation to space needs to be radically reworked to account for new digital dimensions that are dispersed, discontinuous, and yet deeply woven into everyday and institutional worlds. His account highlights the way these digital spaces pepper the official landscape of…

  5. The Mosque Project: Collective Drawings

    ERIC Educational Resources Information Center

    Erwin, Douglas B.

    2013-01-01

    Teaching the author's fifth-graders about Islam through art was a challenge. Remembering a colleague's "Collective Architecture" project, he reworked the concept using mosque architecture as the basis for a new project. The goal was to introduce Islam and its basic tenets using the visual arts, with the hope of enhancing cultural tolerance and…

  6. An Approach to Revision and Evaluation of Student Writing.

    ERIC Educational Resources Information Center

    Duke, Charles R.

    An approach to evaluating student writing that emphasizes reformulation and deemphasizes grades teaches students that reworking their writing is a necessary and acceptable part of the writing process. Reformulation is divided into rewriting, revising, and editing. The instructor diagnoses student papers to determine significant problems on a…

  7. 40 CFR 63.4481 - Am I subject to this subpart?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... aerospace manufacturing and rework (40 CFR part 63, subpart GG). (12) Surface coating of plastic parts... CFR part 63, subpart IIII) at a facility that meets the applicability criteria in § 63.3081(b). (17... Coating of Automobiles and Light-Duty Trucks NESHAP (40 CFR part 63, subpart IIII) and you perform...

  8. 40 CFR 63.4481 - Am I subject to this subpart?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... aerospace manufacturing and rework (40 CFR part 63, subpart GG). (12) Surface coating of plastic parts... CFR part 63, subpart IIII) at a facility that meets the applicability criteria in § 63.3081(b). (17... Coating of Automobiles and Light-Duty Trucks NESHAP (40 CFR part 63, subpart IIII) and you perform...

  9. How Inconvenient Assumptions Affect Preservice Teachers' Uptake of New Interactional Patterns in Mathematics: Analysis and Aspiration through a Bifocal Lens

    ERIC Educational Resources Information Center

    Klein, Mary

    2012-01-01

    In this paper, I highlight the inadequacies of contemporary theoretical and philosophical orthodoxies to fully address pedagogic change. The required change is in mathematics education, and it has to do with enabling preservice teachers, upon graduation, to rework extant power relations in implementing new interactional patterns that centre the…

  10. Effects of bioturbation on seagrasses: Implications for management and restoration

    EPA Science Inventory

    Marine and estuarine fauna can diminish or enhance seagrass condition simply as a result of their burrowing, excavating, re-working, and feeding activities (e.g., bioturbation). We present the first comprehensive review of the effects of bioturbators on seagrasses and associated ...