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Sample records for dating impact-related deformation

  1. Electron Backscatter Diffraction (EBSD) Analysis and U-Pb Geochronology of the Oldest Lunar Zircon: Constraining Early Lunar Differentiation and Dating Impact-Related Deformation

    NASA Technical Reports Server (NTRS)

    Timms, Nick; Nemchin, Alexander; Grange, Marion; Reddy, Steve; Pidgeon, Bob; Geisler, Thorsten; Meyer, Chuck

    2009-01-01

    The evolution of the early moon was dominated by two processes (i) crystallization of the Lunar Magma Ocean (LMO) and differentiation of potassium-rare earth element-phosphorous-rich residual magma reservoir referred to as KREEP, and (ii) an intense meteorite bombardment referred to as lunar cataclysm . The exact timing of these processes is disputed, and resolution relies on collection and interpretation of precise age data. This study examines the microstructure and geochronology of zircon from lunar impact breccias collected during the Apollo 17 mission. A large zircon clast within lunar breccia 72215,195 shows sector zoning in optical microscopy, cathodoluminescence (CL) imaging and Raman mapping, and indicates that it was a relict fragment of a much larger magmatic grain. Sensitive high resolution ion microprobe (SHRIMP) U-Pb analysis of the zircon shows that U and Th concentration correlate with sector zoning, with darkest CL domains corresponding with high-U and Th (approx.150 and approx.100 ppm respectively), and the brightest-CL sectors containing approx.30-50 ppm U and approx.10-20 ppm Th. This indicates that variations in optical CL and Raman properties correspond to differential accumulation of alpha-radiation damage in each sector. Electron backscatter diffraction (EBSD) mapping shows that the quality of electron backscatter patterns (band contrast) varies with sector zoning, with the poorest quality patterns obtained from high-U and Th, dark-CL zones. EBSD mapping also reveals a deformation microstructure that is cryptic in optical, CL and Raman imaging. Two orthogonal sets of straight discrete and gradational low-angle boundaries accommodate approx.12 misorientation across the grain. The deformation bands are parallel to the crystallographic {a}-planes of the zircon, have misorientation axes parallel to the c-axis, and are geometrically consistent with formation by dislocation creep associated with <100>{010} slip. The deformation bands are unlike

  2. Impact-Related Deformation of PDFs in Quartz: When Identification of True PDFs Becomes Challenging

    NASA Astrophysics Data System (ADS)

    Pittarello, L.; Burlet, C.; Raes, M.; Koeberl, C.; Debaille, V.; Terryn, H.; Claeys, Ph.

    2015-09-01

    Electron microscopy on shocked quartz from the El'gygytgyn impact structure has revealed syn-impact, crystal deformation that has overprinted PDFs and hampers PDFs correct indexation by means of optical microscope and U-stage.

  3. Dating brittle deformation in the Archean Yilgarn Craton, Western Australia

    NASA Astrophysics Data System (ADS)

    Thebaud, N.; Zwingmann, H.

    2012-12-01

    Major deformation throughout the Archean Yilgarn Craton has mostly been interpreted to be Neoarchean (Blewett and Czarnota, 2007). The timing of the deformation events of the brittle/ductile deformation generally relies on dating of cross-cutting intrusions or unconformities. Proterozoic overprinting and reactivation of Archean structures in the north-western part of the Yilgarn Craton has previously been dated from direct dating of the structures and fabrics from the Narryer Terrane(Spaggiari et al., 2008). However, the brittle deformation that postdates Neoarchean brittle-ductile structures in the Yilgarn Craton have received little attention to date. In the centre of the Yilgarn Craton, the Eastern Goldfields present a well developed network of E-W trending of normal brittle faults and fractures. Typically these structures are interpreted to have developed in result of a late Neoarchean tectonic relaxation following the main Yilgarn wide E-W contraction (Blewett and Czarnota, 2007). Poorly preserved and weathered faulted rocks in the subsurface environment preclude direct dating of fault gouge. However, exposure from the underground Agnew mine, in the Agnew Wiluna greenstone belt, recently provided access to fresh fault gouge material suitable for analysis. The clay gouge was characterized by SEM, TEM and XRD methods prior to age dating indicating an authigenic origin (Zwingmann et al., 2010). K-Ar illite age data of a whole rock sample split yielded an age of 1148 ± 23 Ma, which is within error close to the <2 micron clay fraction yielding an age of 1094 ± 22 Ma (Mesoproterozoic-Stenian). Our result is the first documentation of the age of the brittle deformation that affects the Yilgarn Craton. This age is within error of the Gilles event which is an extension event that affected the whole Australian continent and is responsible for the emplacement of the Warakurna Large Igneous Province and related dolerite dykes in the Yilgarn Craton (Evins et al., 2010

  4. Improvements to luminescence dating of Quaternary sediments deformed by earthquakes

    NASA Astrophysics Data System (ADS)

    Lawson, M. J.; Rhodes, E. J.; Barrera, W. A.; Ochoa, G. T.

    2012-12-01

    Luminescence dating of sediments on timescales of decades to several hundred thousand years provides the potential to improve our understanding of the dynamics of fault movement and earthquake generation. Sedimentary structures offset by fault slip such as terrace risers, and deposits deformed by seismicity may be dated over timescales that help bridge the gap between direct observation and the geologic record. Neotectonic environments offer unique challenges for the optical dating of quartz, using optically stimulated luminescence (OSL) signals. Quartz grains eroded from bedrock often display low OSL sensitivity, high thermal transfer, and in some cases suffer from signal contributions from microscopic inclusions of other minerals. Anomalous fading of feldspar, and differing responses to specific measurement protocols by different minerals, make signal contamination a potential issue with quartz OSL. A previous test to assess quartz signal purity (the "quartziness" test) has been expanded to include more components for analysis. These include not only normalized thermal quenching (OSL signal response to measurement at different temperatures), but also IRSL (infra-red stimulated luminescence intensity, a ratio of IRSL signal to OSL intensity (post IRSL bleach) and a ratio of OSL (post-IRSL bleach) to non IRSL bleached OSL signal intensities. When graphed, feldspar and quartz samples occupy distinct regions that aid in the assessment of signal contributions for new samples as a check on sample preparation and OSL dating suitability. We examine the performance of this approach for detecting quartz signal contamination using samples from Southern California, New Zealand and High Asia.

  5. Dating rock deformation with monazite: The impact of dissolution precipitation creep

    NASA Astrophysics Data System (ADS)

    Wawrzenitz, Nicole; Krohe, Alexander; Rhede, Dieter; Romer, Rolf L.

    2012-03-01

    The U-Th-Pb system of monazite behaves differently dependent on the deformation mechanism - dissolution precipitation creep (DPC) or dislocation creep - activated in the hosting metamorphic rocks. This can be exploited to use monazite for dating deformation, as is shown in rocks subsequently deformed by dislocation creep and DPC. In rock layers intensely deformed by DPC, mineral reactions, particularly the dissolution of feldspar and apatite increased the alkali-content and reactivity of the fluid. This in turn led to dissolution of old predeformative monazite grains. New synmetamorphic monazite grains formed as the result of inter-grain transport of material over distances within the grain-scale. This process efficiently led to complete resetting of the monazite U-Th-Pb system, even at temperatures prevailing during greenschist facies conditions. The chemical composition of the new monazite records the dissolution of the old feldspar by a less pronounced negative Eu anomaly compared to old monazite. The shape of the monazite grains that precipitated during creep indicates the sense of shear in the shear zone, thus linking the obtained ages directly to the map-scale tectonic transport. In rock layers predominantly deformed by dislocation creep, old monazite grains survived intense mylonitization and high strain, and show a core-rim structure. The cores are patchy, reflecting intra-grain, coupled dissolution-reprecipitation replacement processes. A wide range in apparent, geologically inaccurate Th/Pb and U/Pb ages among the patchy zones is the result of incomplete removal of in-situ grown radiogenic Pb from the patchy domains, depletion of Th and U and the redistribution of Th and U among the domains. Exclusively in the rims of the old monazite, the chemical composition correlates to that of the syndeformative monazites, and the U-Th-Pb system reflects the subsequent DPC. Accordingly, rocks pervasively deformed by DPC should be preferably used to obtain monazite

  6. Indirect dating of deformation: a geochronological study from the Pan African Ajaj shear zone, Saudi Arabia.

    NASA Astrophysics Data System (ADS)

    Hassan, Mahmoud; Abu-Alam, Tamer; Stüwe, Kurt; Klötzli, Urs

    2013-04-01

    The metamorphic complexes of the Arabian-Nubian Shield were exhumed by different exhumation mechanisms (i.e. in extension or oblique transpression regime) during the Pan African activity of Najd Fault System - the largest pre-Mesozoic shear zone on Earth. The different exhumation mechanisms could be the consequence of (i) orientation of the complexes at slightly different angles with respect to the overall orientation of the principal stresses of the Najd Fault System, (ii) exhumation from different depths, or (iii) change of the stress regime through time. In order to test the third hypothesis, geochronological work will be applied on a representative suite of complexes across the Najd Fault System. In particular we focus on three complexes in the Arabian part of the shield named Qazaz, Hamadat and Wajh. In general, the metamorphic complexes of the Arabian part of the shield exhibit left-lateral transcurrent tectonism along the NW-SE Najd faults and right-lateral movement along conjugate NE-SW striking structures. The whole unit forms an anastomosing network of planar structures that demarcate large fish-shaped bodies of high grade metamorphics. The Hamadat complex is surrounded by a left-lateral greenshist facies WNW-ESE Ajaj shear zone. The complex consists of folds that are strongly pinched to the north and more open to the south marked by a well-developed parallel stretching sub-horizontal lineation. Granite intrusions along and across the Ajaj shear zone may allow testing the timing of the deformation. Deformed and non-deformed samples of these granites will be examined by age dating to determine the absolute timing of the metamorphism and the deformation for the complex. Some 20 samples are currently being prepared for zircon dating. Whilst no results are available at the time of writing of this abstract, they will be presented at EGU 2013.

  7. 10Be surface exposure dating reveals strong active deformation in the central Andean backarc interior

    NASA Astrophysics Data System (ADS)

    García Morabito, Ezequiel; Terrizzano, Carla; Zech, Roland; Willett, Sean; Yamin, Marcela; Haghipour, Negar; Wuethrich, Lorenz; Christl, Marcus; María Cortes, José; Ramos, Victor

    2016-04-01

    Understanding the deformation associated with active thrust wedges is essential to evaluate seismic hazard. How is active faulting distributed throughout the wedge, and how much deformation is taken up by individual structures? We address these questions for our study region, the central Andean backarc of Argentina. We combined a structural and geomorphological approach with surface exposure dating (10Be) of alluvial fans and strath terraces in two key localities at ~32° S: the Cerro Salinas, located in the active orogenic front of the Precordillera, and the Barreal block in the interior of the Andean mountain range. We analysed 22 surface samples and 6 depth profiles. At the thrust front, the oldest terrace (T1) yields an age of 100-130 ka, the intermediate terrace (T2) between 40-95 ka, and the youngest terrace (T3) an age of ~20 ka. In the Andean interior, T1´ dates to 117-146 ka, T2´ to ~70 ka, and T3´ to ~20 ka, all calculations assuming negligible erosion and using the scaling scheme for spallation based on Lal 1991, Stone 2000. Vertical slip rates of fault offsets are 0.3-0.5 mm/yr and of 0.6-1.2 mm/yr at the thrust front and in the Andean interior, respectively. Our results highlight: i) fault activity related to the growth of the Andean orogenic wedge is not only limited to a narrow thrust front zone. Internal structures have been active during the last 150 ka, ii) deformation rates in the Andean interior are comparable or even higher that those estimated and reported along the emerging thrust front, iii) distribution of active faulting seems to account for unsteady state conditions, and iv) seismic hazards may be more relevant in the internal parts of the Andean orogen than assumed so far. References Lal, D., 1991: Cosmic ray labeling of erosion surfaces: In situ nuclide production rates and erosion models. Earth and Planetary Science Letters 104: 424-439. Stone, J.O., 2000: Air pressure and cosmogenic isotope production. Journal of Geophysical

  8. Structural analysis of the collar of the Vredefort Dome, South Africa—Significance for impact-related deformation and central uplift formation

    NASA Astrophysics Data System (ADS)

    Wieland, Frank; Gibson, Roger L.; Reimold, Wolf Uwe

    2005-10-01

    Landsat TM, aerial photograph image analysis, and field mapping of Witwatersrand supergroup meta-sedimentary strata in the collar of the Vredefort Dome reveals a highly heterogeneous internal structure involving folds, faults, fractures, and melt breccias that are interpreted as the product of shock deformation and central uplift formation during the 2.02 Ga Vredefort impact event. Broadly radially oriented symmetric and asymmetric folds with wavelengths ranging from tens of meters to kilometers and conjugate radial to oblique faults with strike-slip displacements of, typically, tens to hundreds of meters accommodated tangential shortening of the collar of the dome that decreased from ˜17% at a radius from the dome center of 21 km to <5% at a radius of 29 km. Ubiquitous shear fractures containing pseudotachylitic breccia, particularly in the metapelitic units, display local slip senses consistent with either tangential shortening or tangential extension; however, it is uncertain whether they formed at the same time as the larger faults or earlier, during the shock pulse. In addition to shatter cones, quartzite units show two fracture types—a cmspaced rhomboidal to orthogonal type that may be the product of shock-induced deformation and later joints accomplishing tangential and radial extension. The occurrence of pseudotachylitic breccia within some of these later joints, and the presence of radial and tangential dikes of impact melt rock, confirm the impact timing of these features and are suggestive of late-stage collapse of the central uplift.

  9. Influence of deformation and fluids on Ar retention in white mica: Dating the Dover Fault, Newfoundland Appalachians

    NASA Astrophysics Data System (ADS)

    Kellett, Dawn A.; Warren, Clare; Larson, Kyle P.; Zwingmann, Horst; van Staal, Cees R.; Rogers, Neil

    2016-06-01

    White mica 40Ar/39Ar analyses may provide useful constraints on the timing of tectonic processes, but complex geological and thermal histories can perturb Ar systematics in a variety of ways. Ductile shear zones represent excellent case studies for exploring the link(s) between dynamic re-/neo-crystallization of white mica and coeval enhanced fluid flow, and their effect on 40Ar/39Ar dates. White mica 40Ar/39Ar dates were collected from compositionally similar granites that record different episodes of deformation with proximity to the Dover Fault, a terrane-bounding strike-slip shear zone in the Appalachian orogen, Newfoundland, Canada. 40Ar/39Ar data were collected in situ by laser ablation and by step heating single crystals. Results were compared to each other and against complementary U-Pb zircon and monazite, and K-Ar fault gouge analysis. Although step-heat 40Ar/39Ar is a widely applied method in orogenic settings, this dataset shows that relatively flat step-heat 40Ar/39Ar spectra are in contradiction with wide spreads in in-situ40Ar/39Ar dates from the same samples, and that plateau dates in some cases yielded mixed dates of equivocal geological significance. This result indicates that the step-wise release of Ar from white mica likely homogenizes and obscures spatially-controlled Ar isotope reservoirs in white mica from sheared rocks. In contrast, in situ laser ablation 40Ar/39Ar analysis preserves the spatial resolution of 40Ar reservoirs that have been variably reset by deformation and fluid interaction. This study therefore suggests that laser ablation is the best method for dating the timing of deformation recorded by white mica. Final interpretation of results should be guided by microstructural analysis, estimation of deformation temperature, chemical characterization of white mica, and complementary chronometers. Overall the dataset shows that granitic protoliths were emplaced between 430 and 422 Ma (U-Pb zircon). High strain deformation along the

  10. Amino acid epimerization dating of Quaternary coastal deformation in SE Iberian Peninsula: The region between Aguas and Antas Rivers' mouths

    NASA Astrophysics Data System (ADS)

    Torres, Trinidad; Ortiz, José E.; Sánchez-Palencia, Yolanda

    2016-05-01

    The coastal area between the mouths of the Aguas and Antas Rivers presents a deformed system of raised marine deposits, some of which have been strongly affected by active tectonics. The use of amino acid epimerization dating of Glycymeris shells from raised coastal deposits allowed determining the age of these marine deposits, all of them linked to highstand sea levels in the Mediterranean realm, with ages between MIS 11 and MIS 1. These results allowed corroborating the age of some previously studied sites, and using new sampling sites, the general aminostratigraphy for the Quaternary raised marine deposits on the Mediterranean coast was confirmed. The main deformation event took place after MIS 11 and continued until MIS 5, and was linked to the activity of the Palomares Fault.

  11. Pleistocene deformation and landscape evolution in the Tehran plain: results from tectonic geomorphology and TCN-dating

    NASA Astrophysics Data System (ADS)

    Landgraf, Angela; Benedetti, Lucilla; Braucher, Regis; Bourles, Didier; Ballato, Paolo; Strecker, Manfred R.; Friedrich, Anke M.; Tabatabaei, Saeid H.; Shahpasandzadeh, Majid

    2010-05-01

    The ENE-to NW-striking North Tehran Fault (NTF) is an active frontal thrust that delimits the Alborz Mountain range to the south with an up to 2000 m topographic break with respect to the adjacent Tehran plain. Eocene rocks of the Alborz range are thrust over Neogene and Quaternary sediments of the Tehran plain. The NTF constitutes right-stepping segments and merges to the east with the active Mosha-Fasham strike-slip fault (MFF). The historical record of destructive earthquakes lists numerous events on faults in this region, but instrumentally recorded seismicity appears to be focused on the eastern segment of the MFF. The youngest manifestations of deformation along the eastern segment of the NTF and the MFF are faults with normal and left-lateral oblique normal fault kinematics. Along the NTF, this youngest phase of activity is documented by meter-scale fault gouge zones, multiple colluvial wedges with drag features, subsidiary faults, and numerous striated and rotated conglomeratic clasts. Rupture traces and filled extensional cracks reaching the surface document the seismogenic nature of these features. The middle and western segments of the NTF, however, show evidence for Quaternary left-oblique and pure thrusting. These faults displace Quaternary fluvial sediments and alluvial fan deposits. This pattern of deformation also characterizes the Tehran plain in the southern foreland of the Alborz mountains. The western sector of the plain is deforming by (partly blind) thrusting, as manifested by a segmented and internally deformed anticline and abandoned and diverted channels on both sides of this structure. The recency of faulting at depth and corresponding surface deformation can be inferred from 10Be-dating of an adjacent river terrace and possibly postdates 25ka. The central sector of the plain, which forms the substratum of the Tehran megacity, is affected by thrusting and left-lateral strike-slip faulting and contains several sets of uplifted fluvial

  12. Constraints on Alpine hydrothermal activity and deformation from U-Th-Pb dating of cleft monazite and xenotime (Western Alps)

    NASA Astrophysics Data System (ADS)

    Grand'Homme, Alexis; Janots, Emilie; Bosse, Valerie; Seydoux-Guillaume, Anne-Magali; De Ascencao, Roger

    2016-04-01

    movements along major strike slip faults. On the other hand, monazite dating in the Argentera (20.6 ± 0.3 Ma) confirms for the regional diachronism observed from South to the North of the ECM in the Western Alps. First ages were here obtained for the hydrothermal activity of the internal massifs of the Western Alps. As expected from other (thermo)chronometers, hydrothermal activity in the Internal Alpine domains (Briançonnais) is older than in the ECM. In the Briançonnais zone, monazite age at 32.1 ± 0.2 Ma coincides with the exhumation along the penninic front. In the second cleft, monazite age at 23.3 ± 0.2 Ma is more complex to attribute to a specific deformation stage.

  13. Age of the Druksiai-Polotsk deformation zone, Lithuania: a U-Pb dating of metamorphic titanite

    NASA Astrophysics Data System (ADS)

    Vejelyte, Irma; Bogdanova, Svetlana; Salnikova, Ekaterina

    2010-05-01

    The studied Druksiai-Polotsk deformation zone (DPDZ) transects the East Lithuanian Domain (ELD), representing the southern margin of the major Polotsk-Kurzeme zone of faulting in the Baltic-Belarus region. The DPDZ is of 35-40 km wide, E-W trending, and marked well by linear gravity and magnetic anomalies. The crystalline rocks within the DPDZ are granulites, biotite granites, and migmatites, the latter consisting of amphibole-plagioclase paleo- and mesosomes, and plagioclase-quartz-biotite±microcline±amphibole neosomes. Because of ductile shearing gneisses, augen mylonites, mylonites and ultramylonites were produced while tectonic breccias and pseudotachyllite were formed by later brittle deformation. According to geophysical data and the surface morphology of the crystalline basement, a horst-graben structure have recognized along the DPDZ. The graben is filled with Vendian, Cambrian, Ordovician, Silurian and Devonian deposits. A U-Pb dating of titanite from an augen granitoid mylonite in the DPDZ has yielded a concordant age of 1534±9 Ma. This light brown titanite follows the folation in the host rock and was obviously formed during retrogression from amphibolite- to epidote-amphibolite facies and coeval mylonitization. Shear zones of the same age are known in southern and central Sweden and in NE Poland. These E-W trending deformation zones accommodate both mafic and granitoid intrusions and are probably related to an extensional period in the Mesoproterozoic evolution in the western part of the East European Craton. This is a contribution to the project "The Precambrian structure of Baltica as a control of its recent environment and evolution" of the Visby Programme supported by the Swedish Institute and the Lithuanian State Science and Studies Foundation.

  14. Slip-rate Estimation of Active Fault by Luminescence Dating on Deformed River Terraces at Tsaotun, Central Taiwan

    NASA Astrophysics Data System (ADS)

    Chen, Y.; Chen, W.; Lee, C.

    2003-12-01

    This study carried out luminescence ages of the deformed terraces located at Tsaotun in central Taiwan. These terraces are considered as a result of crustal deformation caused by recent activity of the Chelungpu fault, 1999 surface rupture. Since this active fault runs through urban area, it is urgently needed to figure out its neotectonic behavior, including slip-rate and recurrence interval. Based on new ages, we also discuss the terrace correlation and its related structures. The study terraces are all strath terraces with only a few meters of veneered fluvial deposits on top. Due to the strong stream-power, nearly all the outcrops are dominated by fluvial cobbles, which is worst condition to preserve the syndepositional carbonaceous materials. Alternatively, optical stimulated luminescence (OSL) dating uses sandy quartz as the material and even has longer dating upper limit (up to several hundreds of years). Fortunately, sandy layer are found intercalated within the fluvial cobbles in studying terraces. We adopted the Single-Aliquot Regenerative (SAR) dose protocol on large aliquots of 90-150μ m quartz, which were cleaned using HCL, H2O2 and HF in the usual way. In case of incomplete bleaching during quick deposition, the OSL/TL ratio was adopted to approach the true De. Dosimetry is derived by ICP-MS and XRF analyses. For ascertainment of the initial bleaching of fluvial sediment, the modern samples collected in river bed of Wuhsi were also measured. Based on the results of modern samples, we believe that the residuals are inevitable in younger sediments, especially along the upper stream. On the contrary, the samples older than 10 kyr are little influenced due to the larger age error than the younger ones. The OSL age of the terrace samples in the hanging wall is dated ca. 13 kyr, which has been corrected for poorly-bleaching problem. Comparing to the ages collected down hole in the footwalls, we found out vertical displacements of ca. 67 and 37 m, has been

  15. 100 M.a. remagnetization as a dating tool for deformation and cleavage in the Central High Atlas (Morocco)

    NASA Astrophysics Data System (ADS)

    Calvin, P.; Casas, A. M.; Villalain, J. J.; Moussaid, B.

    2015-12-01

    The High Atlas is an intracontinental chain developed as a result of the inversion of Mesozoic basins during the Cenozoic. Its structure is characterized by ENE-WSW tight anticlines limited by wide synclines. In the central sector of the chain, a pervasive tectonic foliation affects Jurassic limestones and marls. There is a controversy about the age of this tectonic foliation and its relationship with either a Late Jurassic or Cenozoic compressional events. The Jurassic carbonates of the Central High Atlas (CHA) show a widespread syntectonic remagnetization carried by magnetite and dated at 100 M.a. by comparing the paleomagnetic direction obtained by small circle intersection (SCI) method with the apparent polar wander path in NW Africa coordinates. Once the 100 M.a. paleomagnetic direction is known, the obtained paleomagnetic direction remagnetization in each site can be used to restore the bedding at the time of the acquisition. In each site, the in situ mean direction of remagnetization defines a small circle (SC) in a complete rotation about the strike of the bedding. This SC gives all possible original directions of the magnetization and if all deformation events are coaxial and without vertical rotation (as it is the case in the study area) all the SC contains the 100 M.a. expected direction. Then, the angle between the 100 M.a. and the in situ paleomagnetic direction along the small circle, equals the angle of rotation of each bed to ultimately find their dips (paleodip) at 100 M.a. Since the consistency between folding and cleavage can be examined from their geometrical relationship, and bedding can be restored to its 100 M.a. geometry (paleodips obtained from paleomagnetic analysis), two end-members exist for the different examined folds: (i) cleavage is consistent with present-day bedding orientation and attitude of bedding was acquired after remagnetization (Cenozoic cleavage), (ii) cleavage is consistent with bedding, but dip of bedding was acquired

  16. Timing of Deformation in the Central Metasedimentary Belt Boundary Thrust Zone (CMBbtz), southern Ontario, Canada, from Electron Microprobe Dating of Monazite

    NASA Astrophysics Data System (ADS)

    Markley, M. J.; Dunn, S. R.; Peck, W. H.; Jercinovic, M. J.; Williams, M. L.

    2015-12-01

    In the Grenville Province of Southern Ontario, the Central Metasedimentary Belt boundary thrust zone (CMBbtz) is a crustal-scale tectonic boundary between the older, granulite-facies Central Gneiss Belt to the NW and the younger, amphibolite-facies Central Metasedimentary Belt to the SE. Although there are a range of tectonic models for the CMBbtz, most workers agree it is a major tectonic boundary that accommodated ductile thrusting and crustal shortening during the Ottawan phase of the Grenville Orogeny (~1080-1020 Ma). Some studies suggest that ductile thrusting in the CMBbtz was roughly synchronous with synorogenic extensional collapse below an orogenic lid. Previous geochronological studies also provide evidence of earlier deformation and/or metamorphic events in the CMBbtz, although the relation between deformation in the CMBbtz to the Elzeviran (~1230 Ma) and Shawinigan (~1180 Ma) orogenies is unclear. Our study is the first to report in situ electron microprobe monazite (mnz) dates from amphibolite-grade ortho- and para-gneisses of the CMBbtz. Our results are broadly consistent with other chronometers. We present dates from 132 age-domains within 83 mnz grains in 14 samples. Although our data provide strong evidence for deformation and metamorphism along the length of the CMBbtz during the Ottawan (1080-1020 Ma), we also report two other clusters of ages: 1140-1110 Ma and 1230-1170 Ma. The latter cluster falls between the widely accepted ranges for the Elzeviran and Shawinigan orogenies. In addition, some individual outcrops, particularly those in Killaloe and Minden, show mnz ages spanning over 200 m.y., and the setting and compositions of individual monazite domains allow us to link mnz growth to episodes of garnet growth during multiple events. Together these data indicate an unexpectedly continuous and long-lived period of deformation and metamorphism in the CMBbtz.

  17. (U-Th)/He and U-Pb double dating constraints on the interplay between thrust deformation and basin development, Sevier foreland basin, Utah

    NASA Astrophysics Data System (ADS)

    Pujols, E.; Stockli, D. F.; Horton, B. K.; Steel, R. J.; Constenius, K. N.

    2015-12-01

    The degree of connectivity between thrust-belt deformation and foreland basin evolution has been a matter of debate for decades. This is in part due to the lack of temporal constraints on the relationship between thrust-belt deformation and associated deposition. New high-resolution zircon (U-Th)-(Pb-He) double dating of pre- and syn-tectonic sedimentary strata along the Sevier thrust front and basin provide an unprecedented geochronological framework to temporally and spatially link the Sevier foreland basin stratigraphy to deforming hinterland sources. Results improve constraints on timing and magnitude of deformation, depositional ages, sediment dispersal and sources. In Late Cretaceous proximal deposits of the Indianola Group (IG) and Canyon Range Conglomerates (CRC), detrital zircon U-Pb (zUPb) and (U-Th)/He ages (ZHe) chronicle the sequential unroofing of the Charlestone-Nebo Salient (CNS) and Canyon Range (CR) duplexes. Furthermore, short ZHe depositional lag-times indicate rapid hinterland exhumation (>1km/my) associated with active thrusting during Cenomanian and Coniacian-Santonian times as supported by bedrock ZHe ages in the CNS and CR thrust sheets. Detrital zircon analyses on the Late Cretaceous marine Book Cliffs strata suggest a more complex source-to-sink evolution compared to the time-equivalent IG and CRC proximal strata due to mixing of multi-source detrital zircons, sediment recycling and more prominent volcanic input. Nonetheless, the overall cooling history recorded in the Book Cliffs clearly reflects three hinterland exhumational phases, an early phase derived from the frontal thrusts and two additional phases with more integrated hinterland ZHe signatures. These three short lag-time phases correlate with fast clastic progradational wedges in the Sevier foreland. These results strengthen the role played by hinterland deformation on clastic progradation and elucidate the temporal relationship between thrusting and foreland basin architecture.

  18. Episodes of brittle deformation within the Dien Bien Phu Fault zone, Vietnam: Evidence from K-Ar age dating of authigenic illite

    NASA Astrophysics Data System (ADS)

    Bui, Hoang Bac; Ngo, Xuan Thanh; Khuong, The Hung; Golonka, Jan; Nguyen, Tien Dung; Song, Yungoo; Itaya, Tetsumaru; Yagi, Koshi

    2017-01-01

    Constraining the timing of fault zone origin and movement history is of fundamental geotectonic importance to understand the evolution and processes of the brittle fault structures. The authors present in this paper authigenic illite K-Ar age data from the fault gouge samples, collected from the Dien Bien Phu Fault (DBPF) in the Dien Bien province, Vietnam as well as in a major strike-slip fault zone in South-East Asia; all of which played important roles in the structural formation and geotectonic development of northwestern Vietnam. The gouge fault samples were separated into four grain-size fractions (< 0.1 μm, 0.1-0.4 μm, 0.4-1.0 μm and 1.0-2.0 μm). The K-Ar ages of the fractions were divided into two age groups, from 26 to 29 Ma and 130 Ma. The timing of the fault movements is defined at 26 ± 0.24 Ma, 29 ± 0.61 Ma, 130.1 ± 1.27 Ma and 130.7 ± 1.29 Ma. This indicates that the Dien Bien Phu Fault underwent two movements, first in the Early Cretaceous, with an age of about 130 Ma and second in the Oligocene (Paleogene), with an age of about 26-29 Ma. The ductile deformation of the DBPF terminated during the Early Cretaceous. These studies also indicate slow exhumation of the Dien Bien granitoid complex during the Cretaceous times. The Oligocene ages indicate that the DBPF had been reactivated by the SE extrusion and clock-wise rotation of the Indochina block, caused by the collision of the Indian and Eurasian plates. This tectonic event led to the DBPF brittle-sinistral movement, causing the exhumation phase along the fault. This movement period (ca. 26-29 Ma) is coexistent with 600-700 km sinistral shearing along the Red River-Ailao Shan fault. This is the first report determining the absolute age constraints of multi-activated tectonic events, affecting the Dien Bien Phu Fault using the K-Ar dating method for the gouge samples.

  19. Lunar and Planetary Science XXXV: Impact-Related Deposits

    NASA Technical Reports Server (NTRS)

    2004-01-01

    The session "Impact-Related Deposits" included:Evidence for a Lightning-Strike Origin of the Edeowie Glass; 57Fe M ssbauer Spectroscopy of Fulgurites: Implications for Chemical Reduction; Ca-Metasomatism in Crystalline Target Rocks from the Charlevoix Structure, Quebec, Canada: Evidence for Impact-related Hydrothermal Activity; Magnetic Investigations of Breccia Veins and Basement Rocks from Roter Kamm Crater and Surrounding Region, Namibia; Petrologic Complexities of the Manicouagan Melt Sheet: Implications for 40Ar-39Ar Geochronology; Laser Argon Dating of Melt Breccias from the Siljan Impact Structure, Sweden: Implications for Possible Relationship to Late Devonian Extinction Events; Lunar Impact Crater, India: Occurrence of a Basaltic Suevite?; Age of the Lunar Impact Crater, India: First Results from Fission Track Dating; The Fluidized Chicxulub Ejecta Blanket, Mexico: Implications for Mars; Low Velocity Ejection of Boulders from Small Lunar Craters: Ground Truth for Asteroid Surfaces; Ejecta and Secondary Crater Distributions of Tycho Crater: Effects of an Oblique Impact; Potassium Isotope Systematics of Crystalline Lunar Spherules from Apollo 16; Late Paleocene Spherules from the North Sea: Probable Sea Floor Precipitates: A Silverpit Provenance Unproven; A Lithological Investigation of Marine Strata from the Triassic-Jurassic Boundary Interval, Queen Charlotte Islands, British Columbia, Including a Search for Shocked Quartz; Triassic Cratered Cobbles: Shock Effects or Tectonic Pressure?; Regional Variations of Trace Element Composition Within the Australasian Tektite Strewn Field; Cretaceous-Tertiary Boundary Microtektite-bearing Sands and Tsunami Beds, Alabama Gulf Coastal Plain; Sand Lobes on Stewart Island as Probable Impact-Tsunami Deposits; Distal Impact Ejecta, Uppermost Eocene, Texas Coastal Plain; and Continental Impact Debris in the Eltanin Impact Layer.

  20. Analysis, comparison, and modeling of radar interferometry, date of surface deformation signals associated with underground explosions, mine collapses and earthquakes. Phase I: underground explosions, Nevada Test Site

    SciTech Connect

    Foxall, W; Vincent, P; Walter, W

    1999-07-23

    We have previously presented simple elastic deformation modeling results for three classes of seismic events of concern in monitoring the CTBT--underground explosions, mine collapses and earthquakes. Those results explored the theoretical detectability of each event type using synthetic aperture radar interferometry (InSAR) based on commercially available satellite data. In those studies we identified and compared the characteristics of synthetic interferograms that distinguish each event type, as well the ability of the interferograms to constrain source parameters. These idealized modeling results, together with preliminary analysis of InSAR data for the 1995 mb 5.2 Solvay mine collapse in southwestern Wyoming, suggested that InSAR data used in conjunction with regional seismic monitoring holds great potential for CTBT discrimination and seismic source analysis, as well as providing accurate ground truth parameters for regional calibration events. In this paper we further examine the detectability and ''discriminating'' power of InSAR by presenting results from InSAR data processing, analysis and modeling of the surface deformation signals associated with underground explosions. Specifically, we present results of a detailed study of coseismic and postseismic surface deformation signals associated with underground nuclear and chemical explosion tests at the Nevada Test Site (NTS). Several interferograms were formed from raw ERS-1/2 radar data covering different time spans and epochs beginning just prior to the last U.S. nuclear tests in 1992 and ending in 1996. These interferograms have yielded information about the nature and duration of the source processes that produced the surface deformations associated with these events. A critical result of this study is that significant post-event surface deformation associated with underground nuclear explosions detonated at depths in excess of 600 meters can be detected using differential radar interferometry. An

  1. An up-to-date GNSS velocity field of the Upper Rhine Graben: an active seismic region without observed present deformations?

    NASA Astrophysics Data System (ADS)

    Masson, Frédéric; Henrion, Eric; Ulrich, Patrice

    2016-04-01

    The Rhine Graben is the central, most prominent segment of the European Cenozoic rift system (ECRIS) of Oligocene age, which extends from the North Sea through Germany and France to the Mediterranean coast over a distance of some 1000 km. Within GURN the focus will be on the Upper Rhine Graben (URG). The URG is a 300 km long and 40 km wide SSW-NNE trending rift, extending from Basel (Switzerland) to Frankfurt (Germany). It is limited to the west by the Vosges mountains and to the east by the Black Forest. The graben is bounded to the north by the uplifted area of the Rhenish Massif. To the south, the Leymen, Ferrette and Vendlincourt folds represent the northern-most structural front of the Jura fold and thrust belt. In this study, we will present an up-to-date GNSS velocity field of the area based on a network of about 70 stations older than 5 years and ranging up to 12 years. The processing of the final velocity field go through some of corrections due to the use of a permanent GNSS network. An antenna switch generally induce a jump in the data which we have to correct. We also have to correct the outliers in the time series. The last step is to analyze the quality of the series based on the support and environment of the site, if the series is too biased by a flicker noise, we decide to reject it. The results seem to clearly indicate the lack of consistent horizontal velocities (on average 0.38mm/yr) in the URG, which could be not true fort vertical velocities.

  2. Radiocarbon Dating

    SciTech Connect

    Buchholz, B A

    2007-12-20

    Radiocarbon dating can be used to determine the age of objects that contain components that were once alive. In the case of human remains, a radiocarbon date can distinguish between a crime scene and an archeological site. Documents, museum artifacts and art objects can be dated to determine if their age is correct for the historical context. A radiocarbon date does not confirm authenticity, but it can help identify a forgery.

  3. Dating Violence

    ERIC Educational Resources Information Center

    Stader, David L.

    2011-01-01

    Dating violence is a form of student-on-student victimization and is a serious school safety issue. Research indicates that at a minimum, 10 percent of high school students are victims of dating violence in one form or another. Among female high school students that date, some data indicate that as many as 30 percent may be victims of dating…

  4. Radiocarbon Dating.

    PubMed

    Van Strydonck, Mark

    2016-04-01

    Although most historians and art historians consider the radiocarbon dating technique not to be very precise by their criteria, the method has gained much importance over the last decades. Radiocarbon dating is increasingly used in the field of textile research and old polychrome statues, but also objects made of ivory, stucco, paper, and parchment are dated with the technique. Especially after the introduction of the AMS technique, a boom of this type of research has been noticed.

  5. Controls on space-time distribution of soft-sediment deformation structures: Applying palaeomagnetic dating to approach the apparent recurrence period of paleoseisms at the Concud Fault (eastern Spain)

    NASA Astrophysics Data System (ADS)

    Ezquerro, L.; Moretti, M.; Liesa, C. L.; Luzón, A.; Pueyo, E. L.; Simón, J. L.

    2016-10-01

    This work describes soft-sediment deformation structures (clastic dykes, load structures, diapirs, slumps, nodulizations or mudcracks) identified in three sections (Concud, Ramblillas and Masada Cociero) in the Iberian Range, Spain. These sections were logged from boreholes and outcrops in Upper Pliocene-Lower Pleistocene deposits of the Teruel-Concud Residual Basin, close to de Concud normal fault. Timing of the succession and hence of seismic and non-seismic SSDSs, covering a time span between 3.6 and 1.9 Ma, has been constrained from previous biostratigraphic and magnetostratigraphic information, then substantially refined from a new magnetostratigraphic study at Masada Cociero profile. Non-seismic SSDSs are relatively well-correlated between sections, while seismic ones are poorly correlated except for several clusters of structures. Between 29 and 35 seismic deformed levels have been computed for the overall stratigraphic succession. Factors controlling the lateral and vertical distribution of SSDSs are their seismic or non-seismic origin, the distance to the seismogenic source (Concud Fault), the sedimentary facies involved in deformation and the observation conditions (borehole core vs. natural outcrop). In the overall stratigraphic section, seismites show an apparent recurrence period of 56 to 108 ka. Clustering of seismic SSDSs levels within a 91-ka-long interval records a period of high paleoseismic activity with an apparent recurrence time of 4.8 to 6.1 ka, associated with increasing sedimentation rate and fault activity. Such activity pattern of the Concud Fault for the Late Pliocene-Early Pliocene, with alternating periods of faster and slower slip, is similar to that for the most recent Quaternary (last ca. 74 ka BP). Concerning the research methods, time occurrence patterns recognized for peaks of paleoseismic activity from SSDSs in boreholes are similar to those inferred from primary evidence in trenches. Consequently, apparent recurrence periods

  6. Spinal deformity.

    PubMed

    Bunnell, W P

    1986-12-01

    Spinal deformity is a relatively common disorder, particularly in teenage girls. Early detection is possible by a simple, quick visual inspection that should be a standard part of the routine examination of all preteen and teenage patients. Follow-up observation will reveal those curvatures that are progressive and permit orthotic treatment to prevent further increase in the deformity. Spinal fusion offers correction and stabilization of more severe degrees of scoliosis.

  7. Bunionette deformity.

    PubMed

    Cohen, Bruce E; Nicholson, Christopher W

    2007-05-01

    The bunionette, or tailor's bunion, is a lateral prominence of the fifth metatarsal head. Most commonly, bunionettes are the result of a widened 4-5 intermetatarsal angle with associated varus of the metatarsophalangeal joint. When symptomatic, these deformities often respond to nonsurgical treatment methods, such as wider shoes and padding techniques. When these methods are unsuccessful, surgical treatment is based on preoperative radiographs and associated lesions, such as hyperkeratoses. In rare situations, a simple lateral eminence resection is appropriate; however, the risk of recurrence or overresection is high with this technique. Patients with a lateral bow to the fifth metatarsal are treated with a distal chevron-type osteotomy. A widened 4-5 intermetatarsal angle often requires a diaphyseal osteotomy for correction.

  8. Food Product Dating

    MedlinePlus

    ... of date you might find on a meat, poultry, or egg product label. Are dates required on ... is not required by Federal regulations. For meat, poultry, and egg products under the jurisdiction of the ...

  9. Bilateral cleft lip nasal deformity

    PubMed Central

    Singh, Arun Kumar; Nandini, R.

    2009-01-01

    Bilateral cleft lip nose deformity is a multi-factorial and complex deformity which tends to aggravate with growth of the child, if not attended surgically. The goals of primary bilateral cleft lip nose surgery are, closure of the nasal floor and sill, lengthening of the columella, repositioning of the alar base, achieving nasal tip projection, repositioning of the lower lateral cartilages, and reorienting the nares from horizontal to oblique position. The multiplicity of procedures in the literature for correction of this deformity alludes to the fact that no single procedure is entirely effective. The timing for surgical intervention and its extent varies considerably. Early surgery on cartilage may adversely affect growth and development; at the same time, allowing the cartilage to grow in an abnormal position and contributing to aggravation of deformity. Some surgeons advocate correction of deformity at an early age. However, others like the cartilages to grow and mature before going in for surgery. With peer pressure also becoming an important consideration during the teens, the current trend is towards early intervention. There is no unanimity in the extent of nasal dissection to be done at the time of primary lip repair. While many perform limited nasal dissection for the fear of growth retardation, others opt for full cartilage correction at the time of primary surgery itself. The value of naso-alveolar moulding (NAM) too is not universally accepted and has now more opponents than proponents. Also most centres in the developing world have neither the personnel nor the facilities for the same. The secondary cleft nasal deformity is variable and is affected by the extent of the original abnormality, any prior surgeries performed and alteration due to nasal growth. This article reviews the currently popular methods for correction of nasal deformity associated with bilateral cleft lip, it's management both at the time of cleft lip repair and also secondarily

  10. Radiometric Dating Does Work!

    ERIC Educational Resources Information Center

    Dalrymple, G. Brent

    2000-01-01

    Discusses the accuracy of dating methods and creationist arguments that radiometric dating does not work. Explains the Manson meteorite impact and the Pierre shale, the ages of meteorites, the K-T tektites, and dating the Mount Vesuvius eruption. (Author/YDS)

  11. Dating the Crucifixion

    NASA Astrophysics Data System (ADS)

    Humphreys, Colin J.; Waddington, W. G.

    1983-12-01

    The date of the Crucifixion has been debated for many years, but there has been no agreement on the year nor the day. Astronomical calculations have now been used to reconstruct the Jewish calendar in the first century AD and to date a lunar eclipse that biblical and other references suggest followed the Crucifixion. The evidence points to Friday 3 April AD 33 as the date when Jesus Christ died.

  12. Chemical Principles Revisited: Archaeological Dating.

    ERIC Educational Resources Information Center

    Rowe, M. W.

    1986-01-01

    Discusses methods used to date archaeological artifacts and other remains. They include: (1) nuclear dating techniques (radiocarbon dating, accelerator radiocarbon dating, thermoluminescence, and others); (2) chemical dating techniques (amino acid racemization, obsidian hydration dating, elemental content changes, and thermal analysis dating); and…

  13. Choosing a calving date

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Calving date affects cost and timing of production events. Due to the polyestrous nature of beef females, producers can choose a calving date that fits their production system and geographic region. Any time an entire production system is considered, decision making becomes complex. Any calving syst...

  14. Pests of stored dates

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Dates are a major food crop across a large band of Africa and Eurasia, and to a lesser extent elsewhere. In most of its growing range, dates are threatened with infestation in the field by a complex of pests including nitidulid beetles and pyralid moths of the Subfamily Phycitinae. They are further ...

  15. Date Palm Germplasm

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This book chapter reviews date palm genetic resources and their conservation. Date palm (Phoenix dactylifera) is an important food crop in the Middle East and North Africa. Its center of origin and diversity most probably is the area near Iraq/Iran. From there, it spread throughout its present range...

  16. Dating Violence in Russia

    ERIC Educational Resources Information Center

    Lysova, A. V.

    2007-01-01

    The phenomenon of violence in interpersonal relationships has been little studied in Russia, and the phenomenon of violence between dating partners has not been the object of scientific interest at all. The study on which the present article is based was designed to obtain information about the violence in dating among students enrolled in…

  17. Radiometric Dating in Geology.

    ERIC Educational Resources Information Center

    Pankhurst, R. J.

    1980-01-01

    Described are several aspects and methods of quantitatively measuring geologic time using a constant-rate natural process of radioactive decay. Topics include half lives and decay constants, radiogenic growth, potassium-argon dating, rubidium-strontium dating, and the role of geochronology in support of geological exploration. (DS)

  18. Radiocarbon dating accuracy improved

    NASA Astrophysics Data System (ADS)

    Scientists have extended the accuracy of carbon-14 (14C) dating by correlating dates older than 8,000 years with uranium-thorium dates that span from 8,000 to 30,000 years before present (ybp, present = 1950). Edouard Bard, Bruno Hamelin, Richard Fairbanks and Alan Zindler, working at Columbia University's Lamont-Doherty Geological Observatory, dated corals from reefs off Barbados using both 14C and uranium-234/thorium-230 by thermal ionization mass spectrometry techniques. They found that the two age data sets deviated in a regular way, allowing the scientists to correlate the two sets of ages. The 14C dates were consistently younger than those determined by uranium-thorium, and the discrepancy increased to about 3,500 years at 20,000 ybp.

  19. Date Rape Drugs

    MedlinePlus

    ... also are used to help people commit other crimes, like robbery and physical assault. They are used ... be misleading because the person who commits the crime might not be dating the victim. Rather, it ...

  20. Date Rape (For Teens)

    MedlinePlus

    ... ve been drinking. continue Protect Yourself The best defense against date rape is to try to prevent ... for help if you feel threatened. Take self-defense courses. These can build confidence and teach valuable ...

  1. Dating the Vinland Map

    ScienceCinema

    None

    2016-07-12

    Scientists from Brookhaven National Laboratory, the University of Arizona, and the Smithsonian Institution used carbon-dating technology to determine the age of a controversial parchment that might be the first-ever map of North America.

  2. Dating the Vinland Map

    SciTech Connect

    2013-01-04

    Scientists from Brookhaven National Laboratory, the University of Arizona, and the Smithsonian Institution used carbon-dating technology to determine the age of a controversial parchment that might be the first-ever map of North America.

  3. Teen Dating Violence

    MedlinePlus

    ... Violence Featured Topic: Opportunities for Action Featured Topic: Bullying Research Featured Topic: Prevent Gang Membership Featured Topic: ... and alcohol Involvement in antisocial behaviors Thoughts about suicide Additionally, youth who are victims of dating violence ...

  4. Impact-related Events on Active Tectonic Regions Defined by Its Age, Shocked Minerals and Compositions

    NASA Astrophysics Data System (ADS)

    Miura, Y.; Hirota, A.; Gorton, M.; Kedves, M.

    2002-03-01

    New type of impact-related event is defined at active tectonic region by using semi-circular structure, bulk XRF compositions with mixed data, shocked quartz grains with the PDFs texture, and Fe-Ni content. Example is discussed in Takamatsu MKT crater in Japan.

  5. 76 FR 65541 - Environmental Assessment and Finding of No Significant Impact Related to Exemption From Certain...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-21

    ... COMMISSION Environmental Assessment and Finding of No Significant Impact Related to Exemption From Certain... impact. FOR FURTHER INFORMATION CONTACT: John Hickman, Division of Waste Management and Environmental..., this part of the action does not require either an environmental assessment or an environmental...

  6. Deformations in VLBI antennas

    NASA Technical Reports Server (NTRS)

    Clark, T. A.; Thomsen, P.

    1988-01-01

    A study is presented of deformations in antennas with the emphasis on their influence on VLBI measurements. The GIFTS structural analysis program has been used to model the VLBI antenna in Fairbanks (Alaska). The report identifies key deformations and studies the effect of gravity, wind, and temperature. Estimates of expected deformations are given.

  7. Radiocarbon Dating the Anthropocene

    NASA Astrophysics Data System (ADS)

    Chaput, M. A.; Gajewski, K. J.

    2015-12-01

    The Anthropocene has no agreed start date since current suggestions for its beginning range from Pre-Industrial times to the Industrial Revolution, and from the mid-twentieth century to the future. To set the boundary of the Anthropocene in geological time, we must first understand when, how and to what extent humans began altering the Earth system. One aspect of this involves reconstructing the effects of prehistoric human activity on the physical landscape. However, for global reconstructions of land use and land cover change to be more accurately interpreted in the context of human interaction with the landscape, large-scale spatio-temporal demographic changes in prehistoric populations must be known. Estimates of the relative number of prehistoric humans in different regions of the world and at different moments in time are needed. To this end, we analyze a dataset of radiocarbon dates from the Canadian Archaeological Radiocarbon Database (CARD), the Palaeolithic Database of Europe and the AustArch Database of Australia, as well as published dates from South America. This is the first time such a large quantity of dates (approximately 60,000) has been mapped and studied at a global scale. Initial results from the analysis of temporal frequency distributions of calibrated radiocarbon dates, assumed to be proportional to population density, will be discussed. The utility of radiocarbon dates in studies of the Anthropocene will be evaluated and potential links between population density and changes in atmospheric greenhouse gas concentrations, climate, migration patterning and fire frequency coincidence will be considered.

  8. Plutonium age dating reloaded

    NASA Astrophysics Data System (ADS)

    Sturm, Monika; Richter, Stephan; Aregbe, Yetunde; Wellum, Roger; Mayer, Klaus; Prohaska, Thomas

    2014-05-01

    Although the age determination of plutonium is and has been a pillar of nuclear forensic investigations for many years, additional research in the field of plutonium age dating is still needed and leads to new insights as the present work shows: Plutonium is commonly dated with the help of the 241Pu/241Am chronometer using gamma spectrometry; in fewer cases the 240Pu/236U chronometer has been used. The age dating results of the 239Pu/235U chronometer and the 238Pu/234U chronometer are scarcely applied in addition to the 240Pu/236U chronometer, although their results can be obtained simultaneously from the same mass spectrometric experiments as the age dating result of latter. The reliability of the result can be tested when the results of different chronometers are compared. The 242Pu/238U chronometer is normally not evaluated at all due to its sensitivity to contamination with natural uranium. This apparent 'weakness' that renders the age dating results of the 242Pu/238U chronometer almost useless for nuclear forensic investigations, however turns out to be an advantage looked at from another perspective: the 242Pu/238U chronometer can be utilized as an indicator for uranium contamination of plutonium samples and even help to identify the nature of this contamination. To illustrate this the age dating results of all four Pu/U clocks mentioned above are discussed for one plutonium sample (NBS 946) that shows no signs of uranium contamination and for three additional plutonium samples. In case the 242Pu/238U chronometer results in an older 'age' than the other Pu/U chronometers, contamination with either a small amount of enriched or with natural or depleted uranium is for example possible. If the age dating result of the 239Pu/235U chronometer is also influenced the nature of the contamination can be identified; enriched uranium is in this latter case a likely cause for the missmatch of the age dating results of the Pu/U chronometers.

  9. The Realities of Date Rape.

    ERIC Educational Resources Information Center

    Presley, Cara; Watson, Jennifer; Williams, Audrey R.

    This poster presentation addresses the issue of date rape, specifically in the college environment. Highlighted are date rape statistics, demographics, and date rape drugs. Also discussed are date rape warnings and prevention strategies. It is concluded that college and university administrators must place the issue of date rape and acquaintance…

  10. Biodiversity of date palm

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The date palm (Phoenix dactylifera) is the dominant component upon which the sustainable biophysical and socio-economic structures of the oasis ecosystem are based; a fruit tree with unique nutritional, biochemical and biophysical characteristics, a rich source of aesthetic and cultural values, and ...

  11. The Dating Game.

    ERIC Educational Resources Information Center

    Zerger, Monte J.

    1998-01-01

    Presents activities to cultivate the tendency to see special qualities in numbers that can be played on certain calendar days. Includes games on the constant of the day, Fibonacci and golden ratio dates, primes, powers, December 25, and the day of the year. (ASK)

  12. Deformations of superconformal theories

    NASA Astrophysics Data System (ADS)

    Córdova, Clay; Dumitrescu, Thomas T.; Intriligator, Kenneth

    2016-11-01

    We classify possible supersymmetry-preserving relevant, marginal, and irrelevant deformations of unitary superconformal theories in d ≥ 3 dimensions. Our method only relies on symmetries and unitarity. Hence, the results are model independent and do not require a Lagrangian description. Two unifying themes emerge: first, many theories admit deformations that reside in multiplets together with conserved currents. Such deformations can lead to modifications of the supersymmetry algebra by central and non-central charges. Second, many theories with a sufficient amount of supersymmetry do not admit relevant or marginal deformations, and some admit neither. The classification is complicated by the fact that short superconformal multiplets display a rich variety of sporadic phenomena, including supersymmetric deformations that reside in the middle of a multiplet. We illustrate our results with examples in diverse dimensions. In particular, we explain how the classification of irrelevant supersymmetric deformations can be used to derive known and new constraints on moduli-space effective actions.

  13. 76 FR 77831 - 2012 Presidential Candidate Matching Fund Submission Dates and Post Date of Ineligibility Dates...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-14

    ... Submit Statements of Net Outstanding Campaign Obligations AGENCY: Federal Election Commission. ACTION: Notice of matching fund submission dates and submission dates for statements of net outstanding campaign... statements of net outstanding campaign obligations (``NOCO statement'') after their dates of...

  14. Can Single Crystal (U-Th)/He Zircon Ages from Nördlinger Ries Suevite be Linked to Impact-Related Shock Effects?

    NASA Astrophysics Data System (ADS)

    van Soest, M. C.; Cooper, F. J.; Wartho, J.; Hodges, K.; Buchner, E.; Schmieder, M.; Koeberl, C.

    2010-12-01

    Dating of impact-related material is difficult especially when pristine impact melt is unavailable. In the absence of such melts, most geochronometers in shocked basement or melt-poor impact rocks yield only partially reset or non-reset ages. In such cases, application of the low closure temperature apatite and zircon (U-Th)/He geochronometers can be successful, since impact-related physical and thermal shock should reset the He systematics in both minerals in most materials affected by the impact. For a proof of concept study on the well-studied Ries impact structure, we (U-Th)/He dated apatites (14.08 ± 0.26 Ma 2σ, n = 5) and zircons (14.26 ± 0.31 Ma 2σ, n = 10) from two Aumühle quarry suevite samples and one Polsingen quarry impact melt rock, which was dated at 14.37 ± 0.30 Ma (2σ) using Ar-Ar stepwise heating of recrystallized K-feldspar melt (Buchner et al., 2010). The (U-Th)/He ages agree well with the 14.37 Ma age, but are slightly younger than the suggested age of 14.59 ± 0.20 Ma (2σ - based on recent, post 1995, Ar-Ar data, Buchner et al., 2010) for the impact structure. However, among the 27 zircons dated, 6 were partially reset (>16Ma), and 11 zircons yielded younger dates (<13.5 Ma).The younger dates are problematic for successful (U-Th)/He dating of impact structures of unknown age, as they would be identified incorrectly as the age of the impact event. The cause for these younger dates may be: a) partial He loss due to a post-impact thermal event, which at Ries is unlikely as there is no geological evidence for such an event; b) compromised He retention due to metamictization by progressive radiation damage; or c) compromised He retention due to impact shock-related effects. The latter two causes can produce similar visual effects on zircon and the He loss mechanism is also similar, i.e. changes in the zircon crystal structure on a micro scale. However, the effects of these processes on zircon have been documented extensively by non

  15. Dating Violence among College Students

    ERIC Educational Resources Information Center

    Iconis, Rosemary

    2013-01-01

    Dating violence is a significant problem on college campuses. More than one-fifth of the undergraduate dating population are physically abused by their dating partners and an even greater percentage are psychologically abused. Researchers have identified risk factors for college student dating violence. Preventive interventions are strongly…

  16. Allowable CO2 emissions based on regional and impact-related climate targets

    NASA Astrophysics Data System (ADS)

    Seneviratne, Sonia I.; Donat, Markus G.; Pitman, Andy J.; Knutti, Reto; Wilby, Robert L.

    2016-01-01

    Global temperature targets, such as the widely accepted limit of an increase above pre-industrial temperatures of two degrees Celsius, may fail to communicate the urgency of reducing carbon dioxide (CO2) emissions. The translation of CO2 emissions into regional- and impact-related climate targets could be more powerful because such targets are more directly aligned with individual national interests. We illustrate this approach using regional changes in extreme temperatures and precipitation. These scale robustly with global temperature across scenarios, and thus with cumulative CO2 emissions. This is particularly relevant for changes in regional extreme temperatures on land, which are much greater than changes in the associated global mean.

  17. Allowable CO2 emissions based on regional and impact-related climate targets.

    PubMed

    Seneviratne, Sonia I; Donat, Markus G; Pitman, Andy J; Knutti, Reto; Wilby, Robert L

    2016-01-28

    Global temperature targets, such as the widely accepted limit of an increase above pre-industrial temperatures of two degrees Celsius, may fail to communicate the urgency of reducing carbon dioxide (CO2) emissions. The translation of CO2 emissions into regional- and impact-related climate targets could be more powerful because such targets are more directly aligned with individual national interests. We illustrate this approach using regional changes in extreme temperatures and precipitation. These scale robustly with global temperature across scenarios, and thus with cumulative CO2 emissions. This is particularly relevant for changes in regional extreme temperatures on land, which are much greater than changes in the associated global mean.

  18. Deformation mechanisms in experimentally deformed Boom Clay

    NASA Astrophysics Data System (ADS)

    Desbois, Guillaume; Schuck, Bernhard; Urai, Janos

    2016-04-01

    Bulk mechanical and transport properties of reference claystones for deep disposal of radioactive waste have been investigated since many years but little is known about microscale deformation mechanisms because accessing the relevant microstructure in these soft, very fine-grained, low permeable and low porous materials remains difficult. Recent development of ion beam polishing methods to prepare high quality damage free surfaces for scanning electron microscope (SEM) is opening new fields of microstructural investigation in claystones towards a better understanding of the deformation behavior transitional between rocks and soils. We present results of Boom Clay deformed in a triaxial cell in a consolidated - undrained test at a confining pressure of 0.375 MPa (i.e. close to natural value), with σ1 perpendicular to the bedding. Experiments stopped at 20 % strain. As a first approximation, the plasticity of the sample can be described by a Mohr-Coulomb type failure envelope with a coefficient of cohesion C = 0.117 MPa and an internal friction angle ϕ = 18.7°. After deformation test, the bulk sample shows a shear zone at an angle of about 35° from the vertical with an offset of about 5 mm. We used the "Lamipeel" method that allows producing a permanent absolutely plane and large size etched micro relief-replica in order to localize and to document the shear zone at the scale of the deformed core. High-resolution imaging of microstructures was mostly done by using the BIB-SEM method on key-regions identified after the "Lamipeel" method. Detailed BIB-SEM investigations of shear zones show the following: the boundaries between the shear zone and the host rock are sharp, clay aggregates and clastic grains are strongly reoriented parallel to the shear direction, and the porosity is significantly reduced in the shear zone and the grain size is smaller in the shear zone than in the host rock but there is no evidence for broken grains. Comparison of microstructures

  19. Laboratory for Radiokrypton Dating

    NASA Astrophysics Data System (ADS)

    Zappala, J. C.; Jiang, W.; Bailey, K. G.; Lu, Z. T.; Mueller, P.; O'Connor, T. P.

    2015-12-01

    Due to its simple production and transport in the terrestrial environment, 81Kr (half-life = 230,000 yr) is the ideal tracer for old water and ice with mean residence times in the range of 105-106 years, a range beyond the reach of 14C. 81Kr-dating is now available to the earth science community at large thanks to the development of an efficient and selective atom counter based on the Atom Trap Trace Analysis (ATTA) method. ATTA is a laser-based atom counting method where individual neutral atoms of the desired isotope are selectively captured by laser beams, and their fluorescence detected via a CCD camera. ATTA is unique among trace analysis techniques in that it is free of interferences from any other isotopes, isobars, atomic or molecular species. The ATTA instrument at Argonne's Laboratory for Radiokrypton Dating is capable of measuring both 81Kr/Kr and 85Kr/Kr ratios of environmental samples in the range of 10-14-10-10. For 81Kr-dating in the age range of 150 kyr - 1500 kyr, the required sample size is 5 micro-L STP of krypton gas, which can be extracted from approximately 100 kg of water or 40 kg of ice. For 85Kr/Kr analysis, the sample size can be smaller by an order of magnitude. We are continually developing the method towards higher counting efficiency, smaller sample sizes requirements, and higher sample throughput rates. In the past four years, we have performed radiokrypton analysis of over 150 groundwater and ice samples extracted by collaborators from all seven continents. Sample collection and purification was performed by groups including the University of Chicago, the University of Illinois at Chicago, the University of Bern, and the International Atomic Energy Agency. This work is supported by the U.S. DOE, Office of Nuclear Physics, under contract DE-AC02-06CH11357.

  20. 210Pb dating

    USGS Publications Warehouse

    Swarzenski, Peter W.

    2014-01-01

    Roughly fifty years ago, a small group of scientists from Belgium and the United States, trying to better constrain ice sheet accumulation rates, attempted to apply what was then know about environmental lead as a potential geochronometer. Thus Goldberg (1963) developed the first principles of the 210Pb dating method, which was soon followed by a paper by Crozaz et al. (1964), who examined accumulation history of Antarctic snow using 210Pb. Shortly thereafter, Koide et al. (1972, 1973) adapted this technique to unravel sediment deposition and accumulation records in deep-sea environments. Serendipitously, they chose to work in a deep basin off California, where an independent and robust age model had already been developed. Krishanswami et al. (1971) extended the use of this technique to lacustrine deposits to reconstruct depositional histories of lake sediment, and maybe more importantly, contaminant inputs and burial. Thus, the powerful tool for dating recent (up to about one century old) sediment deposits was established and soon widely adopted. Today almost all oceanographic or limnologic studies that address recent depositional reconstructions employ 210Pb as one of several possible geochronometers (Andrews et al., 2009; Gale, 2009; Baskaran, 2011; Persson and Helms, 2011). This paper presents a short overview of the principles of 210Pb dating and provides a few examples that illustrate the utility of this tracer in contrasting depositional systems. Potential caveats and uncertainties (Appleby et al., 1986; Binford, 1990; Binford et al., 1993; Smith, 2001; Hancock et al., 2002) inherent to the use and interpretation of 210Pb-derived age-models are also introduced. Recommendations as to best practices for most reliable uses and reporting are presented in the summary.

  1. Vulcanism and Radiocarbon Dates

    DOE R&D Accomplishments Database

    Libby, L. M.; Libby, W. F.

    1972-10-01

    We consider whether the long term perturbation of radiocarbon dates, which is known to be approximately a sin function of period about 8000 years and amplitude of about 8% peak-to-peak, could have been caused in any major part by vulcanism. We conclude that this is not the case. On the contrary, present day volcanoes are a far less important source of inert CO{sub 2} (about 100 fold less) than is man's burning of fossil fuels which has caused the Suess dilution of about 2%. (auth)

  2. Deformable human body model development

    SciTech Connect

    Wray, W.O.; Aida, T.

    1998-11-01

    This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). A Deformable Human Body Model (DHBM) capable of simulating a wide variety of deformation interactions between man and his environment has been developed. The model was intended to have applications in automobile safety analysis, soldier survivability studies and assistive technology development for the disabled. To date, we have demonstrated the utility of the DHBM in automobile safety analysis and are currently engaged in discussions with the U.S. military involving two additional applications. More specifically, the DHBM has been incorporated into a Virtual Safety Lab (VSL) for automobile design under contract to General Motors Corporation. Furthermore, we have won $1.8M in funding from the U.S. Army Medical Research and Material Command for development of a noninvasive intracranial pressure measurement system. The proposed research makes use of the detailed head model that is a component of the DHBM; the project duration is three years. In addition, we have been contacted by the Air Force Armstrong Aerospace Medical Research Laboratory concerning possible use of the DHBM in analyzing the loads and injury potential to pilots upon ejection from military aircraft. Current discussions with Armstrong involve possible LANL participation in a comparison between DHBM and the Air Force Articulated Total Body (ATB) model that is the current military standard.

  3. Application of electron spin resonance (ESR) dating to ductile shearing: Examples from the Qinling orogenic belt, China

    NASA Astrophysics Data System (ADS)

    Ren, Shenglian; Song, Chuanzhong; Li, Jiahao

    2016-04-01

    Shear zones are common structures in orogenic belts and elucidation of the tectonic evolution of these orogenic belts to a large degree depends on understanding the kinematics and timing of shear deformation. However, there is a lack of an accurate, fast and convenient way to determine the timing of deformation. In this paper, we apply the ESR (electron spin-resonance spectroscopy) dating method to three syntectonic quartz veins from the Funiushan tectonic belt in the Qinling orogenic belt in central China. The results agree well with the available ages of deformation in the area obtained through other dating methods. This demonstrates the accuracy and feasibility of using the ESR method to date quartz crystals formed during deformation. The method is fast and convenient, and satisfies the accuracy requirement. It is an effective means for determining the timing of deformation, especially in areas with intensive fluid activity during deformation.

  4. Clinical Implications of Nasal Septal Deformities

    PubMed Central

    Mladina, Ranko; Skitarelić, Neven; Poje, Gorazd; Šubarić, Marin

    2015-01-01

    The first attempts to systematize septal distortions have been given by Cottle who defined four groups of septal deformities: subluxation, large spurs, caudal deflection and tension septum. Fortunately, the variations of the septal deformities show a certain order, thus enabling more precise classification. Mladina was the first to make user-friendly classification of septal deformities in six basic types. He also described the seventh type, named “Passali deformity”, which presents individually, but is always a well-defined combination between some of the previous six types. Mladina types of septal deformities (SD) are divided in two main groups: so called “vertical” deformities (types 1, 2, 3 and 4), and “horizontal” ones (types 5 and 6). This classification was immediately well accepted by rhinologists worldwide and started to be cited from the very beginning. Since then it has been continuously cited increasingly more often, thus making Mladina classification a gold standard whenever clinical researches on nasal septum are concerned. More than forty clinical studies based on this classification have been performed to date. It is extremely important to make a strict distinction between the types of SD since all of them play some specific role in the nasal and general physiology in man. PMID:26167337

  5. Calcaneo-valgus deformity.

    PubMed

    Evans, D

    1975-08-01

    A discussion of the essential deformity in calcaneo-valgus feet develops a theme originally put forward in 1961 on the relapsed club foot (Evans 1961). Whereas in the normal foot the medial and lateral columns are about equal in length, in talipes equino-varus the lateral column is longer and in calcaneo-valgus shorter than the medial column. The suggestion is that in the treatment of both deformities the length of the columns be made equal. A method is described of treating calcaneo-valgus deformity by inserting cortical bone grafts taken from the tibia to elongate the anterior end of the calcaneus.

  6. Laboratory for Radiokrypton Dating

    NASA Astrophysics Data System (ADS)

    Lu, Z.; Bailey, K.; Jiang, W.; Müller, P.; O'Connor, T. P.; Zappala, J. C.

    2013-12-01

    Due to its simple production and transport processes in the terrestrial environment, the long-lived noble-gas isotope 81Kr (half-life = 230 kyr) is the ideal tracer for studying old water and ice in the age range of 10^5-10^6 years, a range beyond the reach of 14C. 81Kr dating, a concept pursued in the past four decades by numerous laboratories employing a variety of techniques, is now available for the first time to the earth science community at large. This is made possible by the development of ATTA-3 (Jiang et al., GCA 91, 1-6; 2012), an efficient and selective atom counter based on the Atom Trap Trace Analysis method (Chen et al., Science 286, 1139-1141; 1999). The instrument is capable of measuring both 81Kr/Kr and 85Kr/Kr ratios of environmental samples in the range of 10^-14-10^-10. For 81Kr-dating in the age range of 150 - 1,500 kyr, the required sample size is 5 - 10 micro-L STP of krypton gas, which can be extracted from approximately 100 - 200 kg of water or 40 - 80 kg of ice. For 85Kr/Kr analysis, the required sample size is generally smaller by an order of magnitude because of the isotope's higher initial abundance in the atmosphere. The Laboratory for Radiokrypton Dating is currently equipped to analyze up to 120 samples per year. With future equipment upgrades, this limit can be increased as demand grows. In the period since November 2011, the Laboratory has measured both 81Kr/Kr and 85Kr/Kr ratios in over 50 samples that had been extracted by collaborators from six different continents. The samples were from groundwater wells in the Great Artesian Basin (Australia), Guarani Aquifer (Brazil), and Locust Grove (Maryland); from brine wells of the Waste Isolation Pilot Plant (New Mexico); from geothermal steam vents in Yellowstone National Park; from near-surface ice at Taylor Glacier, Antarctica; and from deep mines in South Africa. Sample collection and purification was performed by groups including the University of Illinois at Chicago, University

  7. Rock Deformation Meeting

    NASA Astrophysics Data System (ADS)

    Green, Harry

    The Third Rock Deformation Colloquium was held December 4, 1989, at the AGU Fall Meeting in San Francisco. Steve Kirby of the U.S. Geological Survey, Menlo Park, Calif., reported on actions taken by the rock deformation steering committee. Brian Wernicke of Harvard University, Cambridge, Mass., talked on the structural geology of the Great Basin.The steering committee voted for “Committee on Deformation of Earth Materials” as the name for the AGU technical committee on rock deformation, Kirby said. Considerable discussion has occurred in the steering committee over our relationship to the AGU Mineral Physics Committee. Indeed, Kirby will become chairman of that committee in 1990, underlining the overlap of the two groups. It was agreed that we will pursue closer association with Mineral Physics.

  8. Wrist deformities after fracture.

    PubMed

    Vanheest, Ann

    2006-02-01

    Wrist deformities can occur after fracture because of malunion of the fracture or injury to the growth plate leading to imbalance of growth. Prevention of malunion is paramount by early recognition with proper reduction and casting or fixation with casting. If a mal-union occurs, an osteotomy may be necessary if anticipated growth will not correct the deformity. Injury of the growth plate may lead to wrist deformity in two ways: angular growth or growth arrest. Angular growth deformities are corrected most commonly by osteotomy. Growth arrest of the radius or the ulna leads to an ulnar-positive or an ulnar-negative variance at the wrist. If the ulnar variance is symptomatic, treatment is centered on achieving a level joint. Options for joint leveling procedures include epiphysiodesis or physeal stapling of the longer bone, lengthening osteotomy of the shorter bone, or shortening osteotomy of the longer bone.

  9. Principles of rock deformation

    SciTech Connect

    Nicolas, A.

    1987-01-01

    This text focuses on the recent achievements in the analysis of rock deformation. It gives an analytical presentation of the essential structures in terms of kinetic and dynamic interpretation. The physical properties underlying the interpretation of rock structures are exposed in simple terms. Emphasized in the book are: the role of fluids in rock fracturing; the kinematic analysis of magnetic flow structures; the application of crystalline plasticity to the kinematic and dynamic analysis of the large deformation imprinted in many metamorphic rocks.

  10. Polygonal deformation bands

    NASA Astrophysics Data System (ADS)

    Antonellini, Marco; Mollema, Pauline Nella

    2015-12-01

    We report for the first time the occurrence of polygonal faults in sandstone, which is compelling given that layer-bound polygonal fault systems have been observed so far only in fine-grained sediments such as clay and chalk. The polygonal faults are shear deformation bands that developed under shallow burial conditions via strain hardening in dm-wide zones. The edges of the polygons are 1-5 m long. The shear deformation bands are organized as conjugate faults along each edge of the polygon and form characteristic horst-like structures. The individual deformation bands have slip magnitudes ranging from a few mm to 1.5 cm; the cumulative average slip magnitude in a zone is up to 10 cm. The deformation bands heaves, in aggregate form, accommodate a small isotropic horizontal extension (strain <0.005). The individual shear deformation bands show abutting T-junctions, veering, curving, and merging where they mechanically interact. Crosscutting relationships are rare. The interactions of the deformation bands are similar to those of mode I opening fractures. The documented fault networks have important implications for evaluating the geometry of km-scale polygonal fault systems in the subsurface, top seal integrity, as well as constraining paleo-tectonic stress regimes.

  11. Violence in Adolescent Dating Relationships

    ERIC Educational Resources Information Center

    Jouriles, Ernest N.; Platt, Cora; McDonald, Renee

    2009-01-01

    Beginning with a definition of dating and dating violence among adolescents, this article explores the factors which impact such violence. It concludes with a review of two school-based prevention/intervention programs (Safe Dates and The Youth Relationships Project). (Contains 1 table.)

  12. Sex Role and Dating Orientation.

    ERIC Educational Resources Information Center

    McCabe, M. P.; Collins, J. K.

    1979-01-01

    Male and female subjects from three age groups completed questionnaires on sex roles and dating orientations. Males approached dating from both a psychoaffectional and psychobiological orientation, while females approached it from a psychoaffectional orientation. Significant differences were found in dating attitudes between male and female…

  13. Radiation in archaeometry: archaeological dating

    NASA Astrophysics Data System (ADS)

    Martini, Marco; Sibilia, Emanuela

    2001-06-01

    Crystalline inclusions contained in ceramics act as thermoluminescent dosimeters, the irradiation source being the natural radiation environment. Because of this, various ceramic materials (pottery, bricks, cooked clays, bronze clay-cores) have been dated by thermoluminescence (TL). A short review of the main possibilities of TL dating is given, with some examples that enlighten the advantages and limits of this method in the field of archaeological dating, compared to TL dating of buildings. The assessment of the chronology of Valdivia culture (Ecuador), based on a three-year project of TL dating, is presented and discussed. The overall uncertainty at around 4-5% can be considered the best limit presently available. The uncertainty distribution found among 700 archaeological TL datings and for about 500 building TL datings is also presented.

  14. Experimental Deformation of Magnetite

    NASA Astrophysics Data System (ADS)

    Till, J. L.; Rybacki, E.; Morales, L. F. G.

    2015-12-01

    Magnetite is an important iron ore mineral and the most prominent Fe-oxide phase in the Earth's crust. The systematic occurrence of magnetite in zones of intense deformation in oceanic core complexes suggests that it may play a role in strain localization in some silicate rocks. We performed a series of high-temperature deformation experiments on synthetic magnetite aggregates and natural single crystals to characterize the rheological behavior of magnetite. As starting material, we used fine-grained magnetite powder that was hot isostatically pressed at 1100°C for several hours, resulting in polycrystalline material with a mean grain size of around 40 μm and containing 3-5% porosity. Samples were deformed to 15-20% axial strain under constant load (approximating constant stress) conditions in a Paterson-type gas apparatus for triaxial deformation at temperatures between 900 and 1100°C and 300 MPa confining pressure. The aggregates exhibit typical power-law creep behavior. At high stresses, samples deformed by dislocation creep exhibit stress exponents close to 3, revealing a transition to near-Newtonian creep with stress exponents around 1.3 at lower stresses. Natural magnetite single crystals deformed at 1 atm pressure and temperatures between 950°C and 1150 °C also exhibit stress exponents close to 3, but with lower flow stresses and a lower apparent activation energy than the aggregates. Such behavior may result from the different oxygen fugacity buffers used. Crystallographic-preferred orientations in all polycrystalline samples are very weak and corroborate numerical models of CPO development, suggesting that texture development in magnetite may be inherently slow compared with lower symmetry phases. Comparison of our results with experimental deformation data for various silicate minerals suggests that magnetite should be weaker than most silicates during ductile creep in dry igneous rocks.

  15. Relative Dating Via Fractures

    NASA Technical Reports Server (NTRS)

    2005-01-01

    [figure removed for brevity, see original site]

    This VIS image of the eastern part of the Tharsis region illustrates how fractures can be used in relative dating of a surface. The fractured materials on the right side of the image are embayed by younger volcanic flows originating to the west of the image. Note how the younger flows cover the ends of the fractures, and are not at all fractured themselves.

    Image information: VIS instrument. Latitude 43.2, Longitude 269.4 East (90.6 West). 19 meter/pixel resolution.

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

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

  16. Deformation and seismicity of Taiwan.

    PubMed

    Vita-Finzi, C

    2000-10-10

    14C-dated Holocene coastal uplift, conventional and satellite geodetic measurements, and coseismic and aseismic fault slip reveal the pattern of distributed deformation at Taiwan resulting from convergence between the Philippine Sea plate and Eurasia; as in other subduction orogenic settings, the locus of strain release and accumulation is strongly influenced by changes in fault geometry across strike. Uplift evidence from the islands of Lutao and Lanhsu is consistent with progressive oblique collision between the Luzon arc and the Chinese continental margin. In the Coastal Range, geodetic and seismic records show that shortening is taken up serially by discontinuous slip on imbricate faults. The geodetic data point to net extension across the Central Range, but deformed Holocene shorelines in the Hengchun Peninsula at its southern extremity suggest that the extension is a superficial effect partly caused by blind reverse faulting. The fastest shortening rates indicated by geodesy are recorded on the Longitudinal Valley fault and across the Chukou fault within the fold-and-thrust belt. In the former, the strain is dissipated mainly as aseismic reverse and strike-slip displacement. In contrast, the fold-and-thrust belt has witnessed five earthquakes with magnitudes of 6.5 or above in the 20th century, including the 1999.9.21 Chi-Chi earthquake (magnitude approximately 7.6) on a branch of the Chukou fault. The neotectonic and geodetic data for Taiwan as a whole suggest that the fold-and-thrust belt will continue to host the majority of great earthquakes on the island.

  17. Crustal deformation and earthquakes

    NASA Technical Reports Server (NTRS)

    Cohen, S. C.

    1984-01-01

    The manner in which the Earth's surface deforms during the cycle of stress accumulation and release along major faults is investigated. In an investigation of the crustal deformation associated with a thin channel asthenosphere displacements are reduced from those computed for a half space asthenosphere. A previous finding by other workers that displacements are enhanced when flow is confined to a thin channel is based on several invalid approximations. The major predictions of the finite element model are that the near field postseismic displacements and strain rates are less than those for a half space asthenosphere and that the postseismic strain rates at intermediate distances are greater (in magnitude). The finite width of the asthenosphere ceases to have a significant impact on the crustal deformation pattern when its magnitude exceeds about three lithosphere thicknesses.

  18. Interfacial Bubble Deformations

    NASA Astrophysics Data System (ADS)

    Seymour, Brian; Shabane, Parvis; Cypull, Olivia; Cheng, Shengfeng; Feitosa, Klebert

    Soap bubbles floating at an air-water experience deformations as a result of surface tension and hydrostatic forces. In this experiment, we investigate the nature of such deformations by taking cross-sectional images of bubbles of different volumes. The results show that as their volume increases, bubbles transition from spherical to hemispherical shape. The deformation of the interface also changes with bubble volume with the capillary rise converging to the capillary length as volume increases. The profile of the top and bottom of the bubble and the capillary rise are completely determined by the volume and pressure differences. James Madison University Department of Physics and Astronomy, 4VA Consortium, Research Corporation for Advancement of Science.

  19. Plate motion and deformation

    SciTech Connect

    Minster, B.; Prescott, W.; Royden, L.

    1991-02-01

    Our goal is to understand the motions of the plates, the deformation along their boundaries and within their interiors, and the processes that control these tectonic phenomena. In the broadest terms, we must strive to understand the relationships of regional and local deformation to flow in the upper mantle and the rheological, thermal and density structure of the lithosphere. The essential data sets which we require to reach our goal consist of maps of current strain rates at the earth's surface and the distribution of integrated deformation through time as recorded in the geologic record. Our success will depend on the effective synthesis of crustal kinematics with a variety of other geological and geophysical data, within a quantitative theoretical framework describing processes in the earth's interior. Only in this way can we relate the snapshot of current motions and earth structure provided by geodetic and geophysical data with long-term processes operating on the time scales relevant to most geological processes. The wide-spread use of space-based techniques, coupled with traditional geological and geophysical data, promises a revolution in our understanding of the kinematics and dynamics of plate motions over a broad range of spatial and temporal scales and in a variety of geologic settings. The space-based techniques that best address problems in plate motion and deformation are precise space-geodetic positioning -- on land and on the seafloor -- and satellite acquisition of detailed altimetric and remote sensing data in oceanic and continental areas. The overall science objectives for the NASA Solid Earth Science plan for the 1990's, are to Understand the motion and deformation of the lithosphere within and across plate boundaries'', and to understand the dynamics of the mantle, the structure and evolution of the lithosphere, and the landforms that result from local and regional deformation. 57 refs., 7 figs., 2 tabs.

  20. Radiocarbon Dating, Memories, and Hopes

    DOE R&D Accomplishments Database

    Libby, W. F.

    1972-10-01

    The history of radiocarbon dating from 1939 to the present is reviewed. The basic principles of radiocarbon dating are that cosmic rays make living things radioactive with {sup 14}C to a certain level fixed by the environment and that at death the intake of food stops so no replenishment of the {sup 14}C steadily lost by the immutable decay occurs. Therefore measurement of the degree of decay gives the time lapse since death, i.e., the radiocarbon age. The equipment developed and experiments performed to measure the specific activity of specimens to be dated are described. The results obtained by world-wide experimenters are discussed. These showed that on simultaneity radiocarbon dating is apparently reliable but that absolute dates may be incorrect by as much as 600 to 700 y. The value of radiocarbon dating to archaeologists, geologists, climatologists, and historians is stressed. (LCL)

  1. Nanolaminate deformable mirrors

    DOEpatents

    Papavasiliou, Alexandros P.; Olivier, Scot S.

    2009-04-14

    A deformable mirror formed out of two layers of a nanolaminate foil attached to a stiff substrate is introduced. Deformation is provided by an electrostatic force between two of the layers. The internal stiffness of the structure allows for high-spatial-frequency shapes. The nanolaminate foil of the present invention allows for a high-quality mirror surface. The device achieves high precision in the vertical direction by using foils with accurately controlled thicknesses, but does not require high precision in the lateral dimensions, allowing such mirrors to be fabricated using crude lithography techniques. Such techniques allow structures up to about the meter scale to be fabricated.

  2. Nanolaminate deformable mirrors

    DOEpatents

    Papavasiliou, Alexandros P.; Olivier, Scot S.

    2010-04-06

    A deformable mirror formed out of two layers of a nanolaminate foil attached to a stiff substrate is introduced. Deformation is provided by an electrostatic force between two of the layers. The internal stiffness of the structure allows for high-spatial-frequency shapes. The nanolaminate foil of the present invention allows for a high-quality mirror surface. The device achieves high precision in the vertical direction by using foils with accurately controlled thicknesses, but does not require high precision in the lateral dimensions, allowing such mirrors to be fabricated using crude lithography techniques. Such techniques allow structures up to about the meter scale to be fabricated.

  3. Micromachined, Electrostatically Deformable Reflectors

    NASA Technical Reports Server (NTRS)

    Bartman, Randall K.; Wang, Paul K. C.; Miller, Linda M.; Kenny, Thomas W.; Kaiser, William J.; Hadaegh, Fred Y.; Agronin, Michael L.

    1995-01-01

    Micromachined, closed-loop, electrostatically actuated reflectors (microCLEARs) provide relatively simple and inexpensive alternatives to large, complex, expensive adaptive optics used to control wavefronts of beams of light in astronomy and in experimental laser weapons. Micromachining used to make deformable mirror, supporting structure, and actuation circuitry. Development of microCLEARs may not only overcome some of disadvantages and limitations of older adaptive optics but may also satisfy demands of potential market for small, inexpensive deformable mirrors in electronically controlled film cameras, video cameras, and other commercial optoelectronic instruments.

  4. Adverse Psychosexual Impact Related to the Treatment of Genital Warts and Cervical Intraepithelial Neoplasia

    PubMed Central

    Campaner, Adriana Bittencourt; Vespa Junior, Nelson; Giraldo, Paulo César; Leal Passos, Mauro Romero

    2013-01-01

    Objective. To compare the psychosexual impact related to the treatment of genital warts and cervical intraepithelial neoplasia (CIN) in women. Methods. 75 patients presenting with HPV-induced genital lesions, belonging to one of two patient groups, were included in the study: 29 individuals with genital warts (GWs) and 46 individuals with CIN grades 2 or 3 (CIN 2/3). Initially, medical charts of each woman were examined for extraction of data on the type of HPV-induced infection and treatment administered. Subjects were interviewed to collect sociodemographic data as well as personal, gynecologic, obstetric, and sexual history. After this initial anamnesis, the Sexual Quotient-Female Version (SQ-F) questionnaire was applied to assess sexual function. After application of the questionnaire, patients answered specific questions produced by the researchers, aimed at assessing the impact of the disease and its treatment on their sexual lives. Results. It is noteworthy that patients with CIN 2/3 had statistically similar classification of sexual quotient to patients with GWs (P = 0.115). However, patients with GWs more frequently gave positive answers to the specific questions compared to patients with CIN 2/3. Conclusion. Based on these findings, it is clear that GWs have a greater impact on sexual behavior compared to CIN 2/3. PMID:26316956

  5. VIEW OF DATE DRIVE, SHOWING DATE PALMS. NOTE TRELLIS ON ...

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

    VIEW OF DATE DRIVE, SHOWING DATE PALMS. NOTE TRELLIS ON TYPE 11 FACILITY, FACILITY 808. VIEW FACING NORTHWEST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  6. Dating human bone: is racemization dating species-specific?

    PubMed

    Moini, Mehdi; Rollman, Christopher M; France, Christine A M

    2013-12-03

    Our recently developed dating technique based on the racemization rate of aspartic acid was applied to dating human bone, as well as that of other mammals, utilizing capillary electrophoresis mass spectrometry. First, several well-dated (mostly (14)C-dated and with strong archeological evidence) human bones ranging in age from 150 to ~10,000 years were used to develop a calibration curve for human bone. The D/L ratio of aspartic acid for these specimens ranged from 2.4% to ~10%, with a correlation coefficient of better than 0.99, indicating a strong linear relationship between the d/l ratio of aspartic acid and the age of the specimens. This calibration curve can now be used to date human archeological specimens of unknown age, up to ~10,000 years. However, when the technique was applied to well-dated mixed species of larger mammal bones such as bison, whale, llama, etc., the calibration curve showed a slower rate of racemization with a lower correlation (0.88). As additional large mammal bones with less certain age (i.e., using archeological evidence alone with no (14)C-dating) were dated the correlation coefficient decreased to 0.70. The correlation coefficient decreased further to 0.58 when the racemization data from all mammals (including human) were added to the calibration curve, indicating the importance of using well-dated, species-specific specimens for forming a calibration curve. This conclusion is consistent with our previously published calibration curve for a single species of silk (Bombyx mori), which followed the expected reversible first-order kinetics. These results support species specificity of amino acid racemization dating.

  7. Crustal thickening during Proterozoic metamorphism and deformation in New Mexico

    NASA Astrophysics Data System (ADS)

    Grambling, Jeffrey A.

    1986-02-01

    Proterozoic rocks in northern and central New Mexico underwent simultaneous metamorphism and deformation, tentatively dated at 1410 Ma. Structural relationships record a minimum of 20% 30% shortening during the latter part of deformation, and chemical zoning in garnet and plagioclase indicates a 20% increase in depth of burial during the same interval. Locally, deformation thickened the upper continental crust by at least 20%. This crustal thickening was distributed over a broad area and caused rocks across 75 000 km2 to recrystallize at peak metamorphic conditions near 525 °C and 4 kbar. The metamorphic terrane cooled isobarically, at rates less than 5 °C/m.y. Such slow cooling may be normal at middle crustal depths. Preservation of the regionally uniform peak metamorphic conditions reflects an unusual tectonic history: heat from the metamorphic event outlasted deformation, and the terrane was not subjected to rapid uplift following its thermal peak.

  8. Hydration rind dates rhyolite flows.

    PubMed

    Friedman, I

    1968-02-23

    Hydration of obsidian has been used to date rhyolite flows, containing obsidian or porphyritic glass, at Glass Mountain (Medicine Lake Highlands) and Mono Lake, California. The method is simple and rapid and can be used to date flows that erupted between 200 and approximately 200,000 years ago.

  9. Ionium dating of igneous rocks.

    PubMed

    Kigoshi, K

    1967-05-19

    Local fractionation of uranium and thorium, between minerals within a sample of igneous rock at the time of crystallization, makes it possible to date its solidification by use of ionium and uranium. Results on samples of granite, pumice, and lava suggest that this method of dating is reliable.

  10. Radiocarbon Dating: An Annotated Bibliography.

    ERIC Educational Resources Information Center

    Fortine, Suellen

    This selective annotated bibliography covers various sources of information on the radiocarbon dating method, including journal articles, conference proceedings, and reports, reflecting the most important and useful sources of the last 25 years. The bibliography is divided into five parts--general background on radiocarbon, radiocarbon dating,…

  11. National Date Palm Germplasm Repository

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The National Clonal Germplasm Repository for Citrus & Dates (NCGRCD), located in Riverside, California USA, is a project of the Agricultural Research Service (ARS) of the United States Department of Agriculture (USDA). The NCGRCD maintains a collection of germplasm of date palm (Phoneix dactylifera ...

  12. Hydration rind dates rhyolite flows

    USGS Publications Warehouse

    Friedman, I.

    1968-01-01

    Hydration of obsidian has been used to date rhyolite flows, containing obsidian or porphyritic glass, at Glass Mountain (Medicine Lake Highlands) and Mono Lake, California. The method is simple and rapid and can be used to date flows that erupted between 200 and approximately 200,000 years ago.

  13. Bizarre Parosteal Osteochondromatous Proliferation causing angular deformities: A Case Report

    PubMed Central

    Hussain, Mohamed Musheer; Arif, K. Salauddin

    2015-01-01

    Introduction: There have been fewer than 150 cases of Bizarre Parosteal Osteochondromatous proliferation (Nora Lesions) reported in the literature to date and no significant reports on angular deformities caused by this lesion. Nora’s lesion can easily be misdiagnosed as osteochondroma or chondrosarcoma and therefore inappropriately managed. Although this condition classically appears in the second or third decade, we present to you a three year old boy who presented with multiple bony swellings over the hand and feet that caused an angular deformity of the involved digits. In the case report we have detailed the angular deformities and its treatment outcome. Case Report: A three year old boy presented with valgus deformity of middle finger of right upper limb with an associated ulnar bony swelling at the level of middle phalanx which was noticed two years before and was progressing rapidly since last three months. On physical examination the swellings were found to be bony hard, midly tender and found to have been causing an angulare deformity of the digits. The initial suspicion was of osteochondromatous lesion however the excision biopsy showed the lesion to be of the rare entity of bizarre parosteal osteochondromatous proliferation. 1 year follow up showed no progression of angular deformity of the operated digits. Conclusion: Bizarre osteochondromatous proliferation is an entity that can rarely present in children which needs to be identified and tackled early to prevent the onset of deformities. Almost all cases warrant surgical intervention and the type of excision varies with the type of lesion. PMID:27299019

  14. Nanoscale deformation mechanisms in bone.

    PubMed

    Gupta, Himadri S; Wagermaier, Wolfgang; Zickler, Gerald A; Raz-Ben Aroush, D; Funari, Sérgio S; Roschger, Paul; Wagner, H Daniel; Fratzl, Peter

    2005-10-01

    Deformation mechanisms in bone matrix at the nanoscale control its exceptional mechanical properties, but the detailed nature of these processes is as yet unknown. In situ tensile testing with synchrotron X-ray scattering allowed us to study directly and quantitatively the deformation mechanisms at the nanometer level. We find that bone deformation is not homogeneous but distributed between a tensile deformation of the fibrils and a shearing in the interfibrillar matrix between them.

  15. 76 FR 37842 - Environmental Assessment and Finding of No Significant Impact Related to Exemption for the Peach...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-28

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Environmental Assessment and Finding of No Significant Impact Related to Exemption for the Peach... security requirements in 10 CFR part 73 and 10 CFR 50.54(p) for the Peach Bottom Atomic Power...

  16. Probing deformed quantum commutators

    NASA Astrophysics Data System (ADS)

    Rossi, Matteo A. C.; Giani, Tommaso; Paris, Matteo G. A.

    2016-07-01

    Several quantum gravity theories predict a minimal length at the order of magnitude of the Planck length, under which the concepts of space and time lose their physical meaning. In quantum mechanics, the insurgence of such a minimal length can be described by introducing a modified position-momentum commutator, which in turn yields a generalized uncertainty principle, where the uncertainty on position measurements has a lower bound. The value of the minimal length is not predicted by theories and must be estimated experimentally. In this paper, we address the quantum bound to the estimability of the minimal uncertainty length by performing measurements on a harmonic oscillator, which is analytically solvable in the deformed algebra induced by the deformed commutation relations.

  17. [Babies with cranial deformity].

    PubMed

    Feijen, Michelle M W; Claessens, Edith A W M Habets; Dovens, Anke J Leenders; Vles, Johannes S; van der Hulst, Rene R W J

    2009-01-01

    Plagiocephaly was diagnosed in a baby aged 4 months and brachycephaly in a baby aged 5 months. Positional or deformational plagio- or brachycephaly is characterized by changes in shape and symmetry of the cranial vault. Treatment options are conservative and may include physiotherapy and helmet therapy. During the last two decades the incidence of positional plagiocephaly has increased in the Netherlands. This increase is due to the recommendation that babies be laid on their backs in order to reduce the risk of sudden infant death syndrome. We suggest the following: in cases of positional preference of the infant, referral to a physiotherapist is indicated. In cases of unacceptable deformity of the cranium at the age 5 months, moulding helmet therapy is a possible treatment option.

  18. Partially segmented deformable mirror

    DOEpatents

    Bliss, Erlan S.; Smith, James R.; Salmon, J. Thaddeus; Monjes, Julio A.

    1991-01-01

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp.

  19. Partially segmented deformable mirror

    DOEpatents

    Bliss, E.S.; Smith, J.R.; Salmon, J.T.; Monjes, J.A.

    1991-05-21

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp. 5 figures.

  20. Osteotomies for bunionette deformity.

    PubMed

    Weil, Lowell; Weil, Lowell Scott

    2011-12-01

    A variety of surgical osteotomy procedures have been described for the bunionette deformity.Metatarsal osteotomies narrow the forefoot, maintain the length of the metatarsal, and preserve function of the metatarsophalangeal joint. Distal metatarsal osteotomies produce less correction and reduce postoperative disability; however, they pose a risk of inadequate correction because of the small width of the fifth metatarsal head and transfer lesions if shortened or dorsiflexed excessively. The sliding oblique metaphyseal osteotomy described by Smith and Weil (without fixation) and later by Steinke (with fixation) is easy to perform and provides good cancellous bone contact. Fixation is sometimes difficult and bone healing can take a few months owing to the unstable construct of this osteotomy. Kitaoka described a distal chevron osteotomy, which provides lateral pressure relief and reduced plantar pressure. This osteotomy is currently the most common procedure used; however, it may prove difficult to perform if the deformity is large and the bone is narrow. Diaphyseal osteotomies are indicated when greater correction is needed; however, they require more dissection and there is greater postoperative convalescence with non–weight bearing for several weeks. Proximal base osteotomies may be used to address significantly increased 4–5 IMAs or when a large degree of sagittal plane correction is required. Approaches that have been described include opening and closing base wedges and basal chevrons. Advantages to this approach are the ability to avoid epiphyseal plates in pediatric patients and maintain function of the MTPJ, while disadvantages include inherent instability of the location of the osteotomy, embarrassment of intraosseous and extraosseus blood supply of the metatarsal, and technical demand. Non–weight bearing is essential for several weeks. The Scarfette procedure is a combination head–shaft procedure, which is indicated to treat mild to moderate

  1. Covariant deformed oscillator algebras

    NASA Technical Reports Server (NTRS)

    Quesne, Christiane

    1995-01-01

    The general form and associativity conditions of deformed oscillator algebras are reviewed. It is shown how the latter can be fulfilled in terms of a solution of the Yang-Baxter equation when this solution has three distinct eigenvalues and satisfies a Birman-Wenzl-Murakami condition. As an example, an SU(sub q)(n) x SU(sub q)(m)-covariant q-bosonic algebra is discussed in some detail.

  2. Advanced Curvature Deformable Mirrors

    DTIC Science & Technology

    2010-09-01

    designs using just a glass wafer and a wafer of Carbon Fiber Reinforced Polymer ( CFRP ). In both cases minimum bend radius decreases and the resonant... matrix is consequently nearly diagonal. The long actuators at the outer edge of the deformable mirror are largely outside the working pupil so their...formal reconstruction of the wave front either explicitly or implicitly in the control matrix . The WFS-DM combination is acting like an analog computer

  3. Deformation of Wrinkled Graphene

    PubMed Central

    2015-01-01

    The deformation of monolayer graphene, produced by chemical vapor deposition (CVD), on a polyester film substrate has been investigated through the use of Raman spectroscopy. It has been found that the microstructure of the CVD graphene consists of a hexagonal array of islands of flat monolayer graphene separated by wrinkled material. During deformation, it was found that the rate of shift of the Raman 2D band wavenumber per unit strain was less than 25% of that of flat flakes of mechanically exfoliated graphene, whereas the rate of band broadening per unit strain was about 75% of that of the exfoliated material. This unusual deformation behavior has been modeled in terms of mechanically isolated graphene islands separated by the graphene wrinkles, with the strain distribution in each graphene island determined using shear lag analysis. The effect of the size and position of the Raman laser beam spot has also been incorporated in the model. The predictions fit well with the behavior observed experimentally for the Raman band shifts and broadening of the wrinkled CVD graphene. The effect of wrinkles upon the efficiency of graphene to reinforce nanocomposites is also discussed. PMID:25765609

  4. Deformable micro torque swimmer

    NASA Astrophysics Data System (ADS)

    Ishikawa, Takuji; Tanaka, Tomoyuki; Omori, Toshihiro; Imai, Yohsuke

    2015-11-01

    We investigated the deformation of a ciliate swimming freely in a fluid otherwise at rest. The cell body was modeled as a capsule with a hyper elastic membrane enclosing Newtonian fluid. Thrust forces due to the ciliary beat were modeled as torques distributed above the cell body. Effects of the membrane elasticity, the aspect ratio of cell's reference shape and the density difference between the cell and the surrounding fluid were investigated. The results showed that the cell deformed like heart shape when Capillary number (Ca) was sufficiently large, and the swimming velocity decreased as Ca was increased. The gravity effect on the membrane tension suggested that the upwards and downwards swimming velocities of Paramecium might be reglated by the calcium ion channels distributed locally around the anterior end. Moreover, the gravity induced deformation made a cell directed vertically downwards, which resulted in a positive geotaxis like behavior with physical origin. These results are important to understand physiology of ciliate's biological responses to mechanical stimuli.

  5. [Neurogenic foot deformities].

    PubMed

    Senst, S

    2010-01-01

    There is a multitude of neurological diseases which may lead to neuro-orthopaedic problems and subsequently to neurogenic foot deformities. For this reason the diagnostician will be consistently surprised that there is a great multitude of different foot abnormalities and that not only the typical spastic talipes equines dominates. Of particular significance here is that these deformities almost always develop progressively, whereas most diseases persist per se, cerebral palsy being a typical case in point. However, in MMC (myelomeningocele) patients, there is also the danger of a worsening of the basic problem in the case of tethered cord syndrome. Unlike congenital talipes equinovarus, neuro-orthopaedic talipes equinovarus often shows over- or undercorrection postoperatively due to a shift in muscle imbalance. It is important, therefore, that the basis of conservative therapy include regular physiotherapy and orthoses during the day and, if necessary, at night. Botulinum toxin has been established as an additional measure for spasticity; however, this cannot always prevent surgical intervention, but is able to delay this to a better point in the development of the child/patient. The present article describes the diversity of neurological deformities and presents conservative as well as surgical therapeutic approaches.

  6. Density Variations in Quartz As a Key for Deciphering Impact-Related Ultrasonic Sounding (Rajlich's Hypothesis)?

    NASA Astrophysics Data System (ADS)

    Mestan, J.; Alvarez Polanco, E. I.

    2014-12-01

    Ultrasound is a form of mechanical energy with a frequency greater than ≈ 20 kHz (upper human hearing limit). It is used in many scientific as well as industrial fields. Most modern applications of ultrasound utilize sources which are either piezoelectric or magnetostrictive (Benwell et Bly 1987). A meteorite impact has been considered to be an ultrasound source during last years (Rajlich 2011). Rajlich (2014) is coming with a hypothesis that white planes made of microcavities in Bohemian quartz have their origin in an impact-related ultrasonic sounding. The Bohemian Massif has been considered to be one of the largest impact craters in whole of the world (Papagiannis et El-Baz 1988, Papagiannis 1989, Rajlich 2014). Rajlich's hypothesis implies a liquid behavior of quartz during the impact event. We state that then there have to exist planes of slightly higher density than their surroundings together with planes of microcavities. They should intersect each other without mutual influencing (as in a case of planes made of microcavities). Because physics of ultrasound during an impact event is a brand new and unknown field, we try to choose a simple way of its cognition. It is possible to take the sine wave and set 3 requirements. (1) There exist some surroundings of points of peak amplitudes. (2) These surroundings are of higher density (compression) or lower density (rarefaction) than the mean density of quartz. (3) The difference between the higher/lower and surrounding density is measurable. There was done an experimental study of Bohemian quartz using QCT bone densitometry at the Radiology Munich. Quartz with a size of ≈ 5 x 8 cm absorbed too much RTG radiation (kV 140, mAs 330), which made a picture of internal structure impossible. We propose another techniques and appeal to other scientists to face this challenge. If Bohemian quartz has a harmonically distributed density, we consider it to be a support for Rajlich's hypothesis. AcknowledgementsWe would like

  7. 31 CFR 595.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 595.302 Section 595... § 595.302 Effective date. The term effective date refers to the effective date of the applicable... of specially designated terrorists designated after that date, the earlier of the date on which...

  8. Radiocarbon dating of terrestrial carbonates

    USGS Publications Warehouse

    Pigati, Jeffrey S.; Rink, W. Jack; Thompson, Jeroen

    2014-01-01

    Terrestrial carbonates encompass a wide range of materials that potentially could be used for radiocarbon (14C) dating. Biogenic carbonates, including shells and tests of terrestrial and aquatic gastropods, bivalves, ostracodes, and foraminifera, are preserved in a variety of late Quaternary deposits and may be suitable for 14C dating. Primary calcareous deposits (marls, tufa, speleothems) and secondary carbonates (rhizoliths, fracture fill, soil carbonate) may also be targeted for dating when conditions are favorable. This chapter discusses issues that are commonly encountered in 14C dating of terrestrial carbonates, including isotopic disequilibrium and open-system behavior, as well as methods used to determine the reliability of ages derived from these materials. Recent methodological advancements that may improve the accuracy and precision of 14C ages of terrestrial carbonates are also highlighted.

  9. Dating sediments using luminescence signals

    SciTech Connect

    Wintle, A. )

    1993-05-01

    Before siting a nuclear power station or a nuclear waste repository, it is necessary to establish that the area has been free of earthquake activity for a sufficient period of time. Evidence of past earthquake activity is often provided by faults in surface sediments. Age limits for fault formation can be set by obtaining the depositional ages of the sediment unit in which the fault was formed and the overlying sediment. A useful technique would be one that dating could be applied to the mineral grains that make up the sediments and that would give the time that has passed since the grains were blown or washed into position. Luminescence dating techniques, of which the most well known is thermo-luminescence (TL), provide such information. This approach has been successful in dating movement on the Wasatch Fault in Utah. A combination of TL and radiocarbon dates indicated that three faulting events had occurred within the past 5000 years. 2 refs., 1 fig.

  10. Pectus excavatum in relief from Ancient Egypt (dating back to circa 2400 BC).

    PubMed

    Bialas, Adam J; Kaczmarski, Jacek; Kozak, Jozef; Kempinska-Miroslawska, Bogumila

    2015-04-01

    Pectus excavatum is one of the most common congenital deformities of the chest wall. The aim of the study was to analyse 621 artefacts (reliefs, sculptures, paintings) from Ancient Egypt in terms of anatomical defects of the chest. The team which analysed artefacts consisted of historians of medicine and thoracic surgeons. The researchers found a relief, depicting a man with an abnormal shape of the chest. The relief was from Niankhkhnum and Khnumhotep mastaba and dates back to circa 2400 BC. The authors think it is possible that the relief may represent a pectus excavatum deformity and believe the image will open up debate on the occurrence of this deformity in ancient times.

  11. Nanoscale Deformable Optics

    NASA Technical Reports Server (NTRS)

    Strauss, Karl F.; Sheldon, Douglas J.

    2011-01-01

    Several missions and instruments in the conceptual design phase rely on the technique of interferometry to create detectable fringe patterns. The intimate emplacement of reflective material upon electron device cells based upon chalcogenide material technology permits high-speed, predictable deformation of the reflective surface to a subnanometer or finer resolution with a very high degree of accuracy. In this innovation, a layer of reflective material is deposited upon a wafer containing (perhaps in the millions) chalcogenic memory cells with the reflective material becoming the front surface of a mirror and the chalcogenic material becoming a means of selectively deforming the mirror by the application of heat to the chalcogenic material. By doing so, the mirror surface can deform anywhere from nil to nanometers in spots the size of a modern day memory cell, thereby permitting realtime tuning of mirror focus and reflectivity to mitigate aberrations caused elsewhere in the optical system. Modern foundry methods permit the design and manufacture of individual memory cells having an area of or equal to the Feature (F) size of the design (assume 65 nm). Fabrication rules and restraints generally require the instantiation of one memory cell to another no closer than 1.5 F, or, for this innovation, 90 nm from its neighbor in any direction. Chalcogenide is a semiconducting glass compound consisting of a combination of chalcogen ions, the ratios of which vary according to properties desired. It has been shown that the application of heat to cells of chalcogenic material cause a large alteration in resistance to the range of 4 orders of magnitude. It is this effect upon which chalcogenidebased commercial memories rely. Upon removal of the heat source, the chalcogenide rapidly cools and remains frozen in the excited state. It has also been shown that the chalcogenide expands in volume because of the applied heat, meaning that the coefficient of expansion of chalcogenic

  12. Microscale radiocarbon dating of paintings

    NASA Astrophysics Data System (ADS)

    Hendriks, Laura; Hajdas, Irka; McIntyre, Cameron; Küffner, Markus; Scherrer, Nadim C.; Ferreira, Ester S. B.

    2016-03-01

    In this paper, radiocarbon dating of paintings using minimal sample sizes has been investigated, in an effort to address the problem of limited access to sample material in paintings. 14C analyses were conducted on signed and dated paintings from two Swiss artists of the twentieth century. The selected paintings dated from the 1930s and 1960s, provided the opportunity to evaluate the dating accuracy on paintings realized before and after 1950 AD when the 14C bomb peak was created, as a result of the nuclear tests conducted in the 1950/1960s. The work focused on the one hand on minimizing the size of the canvas sample required for accelerator mass spectrometer radiocarbon measurement on the gas ion source of the MICADAS and, on the other hand, on testing the possibility of dating the organic binder of the paint. Following careful characterization of the paint composition by X-ray fluorescence spectroscopy, Fourier transformed infrared spectroscopy, and Raman spectroscopy, paints containing no other carbon source than the natural organic binder were identified and dated.

  13. Direct dating of human fossils.

    PubMed

    Grün, Rainer

    2006-01-01

    The methods that can be used for the direct dating of human remains comprise of radiocarbon, U-series, electron spin resonance (ESR), and amino acid racemization (AAR). This review gives an introduction to these methods in the context of dating human bones and teeth. Recent advances in ultrafiltration techniques have expanded the dating range of radiocarbon. It now seems feasible to reliably date bones up to 55,000 years. New developments in laser ablation mass spectrometry permit the in situ analysis of U-series isotopes, thus providing a rapid and virtually non-destructive dating method back to about 300,000 years. This is of particular importance when used in conjunction with non-destructive ESR analysis. New approaches in AAR analysis may lead to a renaissance of this method. The potential and present limitations of these direct dating techniques are discussed for sites relevant to the reconstruction of modern human evolution, including Florisbad, Border Cave, Tabun, Skhul, Qafzeh, Vindija, Banyoles, and Lake Mungo.

  14. Dating of Modern Human Evolution

    NASA Astrophysics Data System (ADS)

    Grun, R.

    Dating studies on palaoeanthropological sites is usually carried out on material associ- ated with the human remains, such as the sediment, charcoal or other fauna rather than the human specimen itself. The reason lies in the fact that most dating techniques are destructive and because the hominid remains are too rare to be sacrificed for dating. This indirect dating approach is in many cases not satisfactory, because: (i) the human remains are often buried into the sediments and the association with other materials is uncertain (e.g. Skhul, Qafzeh, etc.); (ii) faunal remains or minerals from the sediment are re-worked from older deposits (see e.g. present discussion of the age of the Homo erectus remains in Indonesia; (iii) the hominid fossils were discovered at a time when no careful excavations were carried out and it is impossible to correlate the specimen with other datable material (which applies tonearly 90% of all palaeoanthropological specimens). For example, the hominid burial site of Qafzeh in Israel has been dated by several independent dating laboratories with a multitude of methods. However, the data are still not accepted by some because the dating has not been carried out on the hominid specimen. Until recently, hominid fossils could only be dated by radiocarbon. This method reaches back to about 40,000 years. As a consequence, all the older fossils could not be analysed and many important questions in our understanding of human evolution could not be addressed. Human remains are scarce and extremely valuable, therefore any sort of destruction has to be kept to an absolute minimum. This is of particular importance in Australia where any human fossils are sacred. Thus, for the analysis of hominid material it was necessary to develop a more or less non-destructive techniques. This has been ac- complished in recent years by the application of ESR dating of tooth enamel and a combination of gamma spectrometric and TIMS U-series dating of bones. The exam

  15. Earthquake-induced soft-sediment deformation structures in Late Pleistocene lacustrine deposits of Issyk-Kul lake (Kyrgyzstan)

    NASA Astrophysics Data System (ADS)

    Gladkov, A. S.; Lobova, E. U.; Deev, E. V.; Korzhenkov, A. M.; Mazeika, J. V.; Abdieva, S. V.; Rogozhin, E. A.; Rodkin, M. V.; Fortuna, A. B.; Charimov, T. A.; Yudakhin, A. S.

    2016-10-01

    This paper discusses the composition and distribution of soft-sediment deformation structures induced by liquefaction in Late Pleistocene lacustrine terrace deposits on the southern shore of Issyk-Kul Lake in the northern Tien Shan mountains of Kyrgyzstan. The section contains seven deformed beds grouped in two intervals. Five deformed beds in the upper interval contain load structures (load casts and flame structures), convolute lamination, ball-and-pillow structures, folds and slumps. Deformation patterns indicate that a seismic trigger generated a multiple slump on a gentle slope. The dating of overlying subaerial deposits suggests correlation between the deformation features and strong earthquakes in the Late Pleistocene.

  16. Application of rock varnish dating of quaternary surficial deposits in determining times of fault movement

    SciTech Connect

    Harrington, C.D.

    1987-01-01

    Rock varnish, a coating commonly found on rock surfaces in arid and semiarid regions, has a significant potential in paleoseismic studies, as a wide variety of Quaternary surfaces and surficial deposits can be dated with the rock varnish technique. If the formation of geomorphic surfaces or surficial deposits can be related to times of faulting or if faulting has broken or deformed such features, then rock varnish dating can be used to constrain maximum and minimum times of motion on the related fault.

  17. Smoothly deformed light

    NASA Technical Reports Server (NTRS)

    Stenholm, Stig

    1993-01-01

    A single mode cavity is deformed smoothly to change its electromagnetic eigenfrequency. The system is modeled as a simple harmonic oscillator with a varying period. The Wigner function of the problem is obtained exactly by starting with a squeezed initial state. The result is evaluated for a linear change of the cavity length. The approach to the adiabatic limit is investigated. The maximum squeezing is found to occur for smooth change lasting only a fraction of the oscillational period. However, only a factor of two improvement over the adiabatic result proves to be possible. The sudden limit cannot be investigated meaningfully within the model.

  18. Dating of ballpoint pen ink.

    PubMed

    Hofer, R

    2004-11-01

    In this paper we describe a case in which a cash book, dated of the year 2000, was sent to the Forensic Science Division, Document Laboratory, Zurich Canton Police in March 2003. The questioned document was a list of 29 pages containing a consecutive handwritten numbering and dated entries (payments) made of blue ballpoint pen ink. By definition, a cash book has to be written by hand and the entries have to be made daily. The questioned document was suspected to have been written within a short period (e.g., a few hours) and backdated. The document lab was asked to determine the date of the entries of the questioned list. On one hand, we were asked, if the cash book had been kept on account consecutively during the period of one year, and on the other hand, the judges were interested in knowing, if the document could have been written in 2003 and back dated to 2000. To answer these questions, the document was examined for latent elements by electrostatic detection device (ESDA). The relative dating of the entries was performed by the quantification of the ballpoint pen ink dyes and their degradation products using HPLC. Results show that it is possible to determine the relative age of entries written by ballpoint pen within a relatively short time scale, if storage and supporting material of the different samples are the same or at least similar.

  19. Radiocarbon dating of glacier ice: overview, optimisation, validation and potential

    NASA Astrophysics Data System (ADS)

    Uglietti, Chiara; Zapf, Alexander; Jenk, Theo Manuel; Sigl, Michael; Szidat, Sönke; Salazar, Gary; Schwikowski, Margit

    2016-12-01

    High-altitude glaciers and ice caps from midlatitudes and tropical regions contain valuable signals of past climatic and environmental conditions as well as human activities, but for a meaningful interpretation this information needs to be placed in a precise chronological context. For dating the upper part of ice cores from such sites, several relatively precise methods exist, but they fail in the older and deeper parts, where plastic deformation of the ice results in strong annual layer thinning and a non-linear age-depth relationship. If sufficient organic matter such as plant, wood or insect fragments were found, radiocarbon (14C) analysis would have thus been the only option for a direct and absolute dating of deeper ice core sections. However such fragments are rarely found and, even then, they would not be very likely to occur at the desired depth and resolution. About 10 years ago, a new, complementary dating tool was therefore introduced by our group. It is based on extracting the µg-amounts of the water-insoluble organic carbon (WIOC) fraction of carbonaceous aerosols embedded in the ice matrix for subsequent 14C dating. Since then this new approach has been improved considerably by reducing the measurement time and improving the overall precision. Samples with ˜ 10 µg WIOC mass can now be dated with reasonable uncertainty of around 10-20 % (variable depending on sample age). This requires about 300 to 800 g of ice for WIOC concentrations typically found in midlatitude and low-latitude glacier ice. Dating polar ice with satisfactory age precision is still not possible since WIOC concentrations are around 1 order of magnitude lower. The accuracy of the WIOC 14C method was validated by applying it to independently dated ice. With this method, the deepest parts of the ice cores from Colle Gnifetti and the Mt Ortles glacier in the European Alps, Illimani glacier in the Bolivian Andes, Tsambagarav ice cap in the Mongolian Altai, and Belukha glacier

  20. 7 CFR 987.12 - Marketable dates.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... pursuant to § 987.40. Marketable dates shall include but not be limited to the following: (a) DAC dates. DAC dates are marketable whole or pitted dates that are inspected and certified as meeting the grade... handler that are certified as meeting the same grade and size requirements for DAC dates, with...

  1. 31 CFR 588.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 588.302 Section 588... Definitions § 588.302 Effective date. The term effective date refers to the effective date of the applicable... § 588.201(a)(2), the earlier of the date on which is received actual or constructive notice of...

  2. 31 CFR 544.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 544.302 Section 544... REGULATIONS General Definitions § 544.302 Effective date. The term effective date refers to the effective date... property are blocked pursuant to § 544.201(a)(2), (a)(3), or (a)(4), the earlier of the date of actual...

  3. 31 CFR 546.303 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 546.303 Section 546....303 Effective date. The term effective date refers to the effective date of the applicable... § 546.201(a)(2), the earlier of the date of actual or constructive notice of such person's designation....

  4. 21 CFR 1312.25 - Expiration date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 9 2010-04-01 2010-04-01 false Expiration date. 1312.25 Section 1312.25 Food and... SUBSTANCES Exportation of Controlled Substances § 1312.25 Expiration date. An export permit shall not be valid after the date specified therein, which date shall conform to the expiration date specified in...

  5. 31 CFR 537.303 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 537.303 Section 537....303 Effective date. The term effective date refers to the effective date of the applicable... property of persons designated pursuant to § 537.201(a)(2), the earlier of the date on which either...

  6. 31 CFR 541.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 541.302 Section 541... § 541.302 Effective date. The term effective date refers to the effective date of the applicable....201(a)(2), the earlier of the date on which either actual notice or constructive notice is received...

  7. 31 CFR 547.303 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 547.303 Section 547... General Definitions § 547.303 Effective date. The term effective date refers to the effective date of the... blocked pursuant to § 547.201(a)(2), the earlier of the date of actual or constructive notice of...

  8. 31 CFR 594.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 594.302 Section 594... Definitions § 594.302 Effective date. The term effective date refers to the effective date of the applicable... to § 594.201(a)(2), (a)(3), or (a)(4), the earlier of the date on which is received actual...

  9. 21 CFR 1312.25 - Expiration date.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 9 2011-04-01 2011-04-01 false Expiration date. 1312.25 Section 1312.25 Food and... SUBSTANCES Exportation of Controlled Substances § 1312.25 Expiration date. An export permit shall not be valid after the date specified therein, which date shall conform to the expiration date specified in...

  10. Algorithmic deformation of matrix factorisations

    NASA Astrophysics Data System (ADS)

    Carqueville, Nils; Dowdy, Laura; Recknagel, Andreas

    2012-04-01

    Branes and defects in topological Landau-Ginzburg models are described by matrix factorisations. We revisit the problem of deforming them and discuss various deformation methods as well as their relations. We have implemented these algorithms and apply them to several examples. Apart from explicit results in concrete cases, this leads to a novel way to generate new matrix factorisations via nilpotent substitutions, and to criteria whether boundary obstructions can be lifted by bulk deformations.

  11. Rejuvenation effects during plastic deformation of Zircon: geochronological implications

    NASA Astrophysics Data System (ADS)

    Kovaleva, Elizaveta; Klötzli, Urs

    2013-04-01

    Zircon is one of the most stable accessory minerals known on the Earth; it was believed that zircon isotopic ages mostly record primary igneous crystallization events. It is true until the mineral is not affected by plastic deformation or other disturbing events during its life after crystallization. Zircon may deform by the recovery/subgrain rotation recrystallisation that indicates formation and migration of dislocations under crustal conditions. Deformation occurs at depth due to stresses associated with collision of the phases, and forms such microstructures as low-angle boundaries (Reddy et al., 2007). Low-angle boundaries act as fluid migration paths and elements diffusion paths. Facilitating Pb, Ti, U, Th and trace elements mobility in the crystalline zircon, these structures can change chemical, REE and isotopic composition of certain grain's parts (Reddy and Timms, 2010) and lead to isotopic resetting in the mineral domains. Since the isotopic age of the domains of single crystal can vary, it should be possible to recognize and interpret this variation and distinguish the timing of different high-temperature deformation events. Zircon can preserve low-angle boundaries and associated age disturbance under lower-crust temperatures for billions of years (Moser et al., 2009). Electron backscatter diffraction (EBSD) allows us to make microstructural-crystallographic analyses in order to measure the crystallographic orientations in crystalline material. EBSD mapping is supposed to be able to constrain potential diffusion pathways in minerals. It can indicate areas of damaged crystalline structure, helps to examine substructures of minerals used in radiometric dating and to assess the potential for resetting of ages by deformation events (Reddy et al., 2007). In this research we are trying to answer a list of questions, related to isotopic resetting due to deformation: What is the behavior of zircons which were plastically deformed during metamorphic-deformation

  12. On the deformation of gas bubbles in liquids

    NASA Astrophysics Data System (ADS)

    Legendre, Dominique; Zenit, Roberto; Velez-Cordero, J. Rodrigo

    2012-04-01

    We consider the deformation of gas bubbles rising in different liquids over a wide range of Morton numbers, from O(10-11) to O(1), and bubble diameters. We have collected data from the literature and performed new experiments for relatively large Morton numbers. A simple expression is proposed to describe the evolution of the bubble deformation, which is consistent with the analytical solution of Moore ["The rise of a gas bubble in a viscous liquid," J. Fluid Mech. 6, 113 (1959)]. It appears that deformation can be predicted correctly by considering the Morton and Weber numbers. The variation of the bubble interfacial area is also analyzed; this quantity is very important for the case of bubbly flow modeling but has not been measured directly to date.

  13. 75 FR 16516 - Dates Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-01

    ... From the Federal Register Online via the Government Publishing Office ] NATIONAL ARCHIVES AND RECORDS ADMINISTRATION Office of the Federal Register Dates Correction Correction In the Notices section beginning on page 15401 in the issue of March 29th, 2010, make the following correction: On pages...

  14. Sexual Intimacy in Dating Relationships

    ERIC Educational Resources Information Center

    Peplau, Letitia Anne; And Others

    1977-01-01

    The patterning of sexual interaction in male-female dyads and the links between sexual behavior and emotional intimacy were investigated as part of a two-year study of college dating couples. Traditional sexual role playing was found to be common. (Author/AM)

  15. Online Dating and Conjugal Bereavement

    ERIC Educational Resources Information Center

    Young, Dannagal Goldthwaite; Caplan, Scott E.

    2010-01-01

    This study examined self-presentation in the online dating profiles of 241 widowed and 280 divorced individuals between 18 and 40 years old. A content analysis of open-ended user-generated profiles assessed the presence or absence of various themes, including the user's marital status, the backstory of their lost relationship, and whether they…

  16. Dating Techniques in Archaeology and Paleoanthropology.

    ERIC Educational Resources Information Center

    Taylor, R. E.

    1987-01-01

    Discusses some of the new physical dating methods being used by archaeologists and paleoanthropologists to study the material remains of ancient primates. Describes the quaternary physical dating techniques, advances in radiocarbon dating, and the radiocalcium data method. (TW)

  17. Dating techniques in archaeology and paleoanthropology

    SciTech Connect

    Taylor, R.E.

    1987-02-15

    Archaeologists have an increasing array of physical dating methods at their disposal. R.E. Taylor of the University of California discusses available techniques, recent advances in radiocarbon dating, and current developments in radiocalcium dating.

  18. 40 CFR 63.403 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... compliance date shall be 18 months after September 8, 1994. (b) For new IPCT's that have an initial startup... initial startup on or after September 8, 1994, the compliance date shall be the date of the initial startup....

  19. 40 CFR 63.403 - Compliance dates.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... compliance date shall be 18 months after September 8, 1994. (b) For new IPCT's that have an initial startup... initial startup on or after September 8, 1994, the compliance date shall be the date of the initial startup....

  20. Deformed chiral nucleons

    NASA Astrophysics Data System (ADS)

    Price, C. E.; Shepard, J. R.

    1991-04-01

    We compute properties of the nucleon in a hybrid chiral model based on the linear σ-model with quark degrees of freedom treated explicity. In contrast to previous calculations, we do not use the hedgehog ansatz. Instead we solve self-consistently for a state with well defined spin and isospin projections. We allow this state to be deformed and find that, although d- and g-state admixtures in the predominantly s-state single quark wave functions are not large, they have profound effects on many nucleon properties including magnetic moments and gA. Our best fit parameters provide excellent agreement with experiment but are much different from those determined in hedgehog calculations.

  1. [Rheumatic forefoot deformities].

    PubMed

    Fuhrmann, R

    2014-11-01

    The frequency and extent of rheumatic forefoot deformities have been greatly reduced since the introduction of disease-modifying antirheumatic drugs (DMARD). The accompanying reduction in arthritic destruction of joints opens up new treatment options whereby priority is given to joint preservation. This is true for the first middle foot ray as well as for the small toe rays. Whereas resection arthroplasty of the metatarsophalangeal joints II-V was previously considered the gold standard treatment, joint-preserving operative procedures (e.g. metatarsal osteotomy and periarticular soft tissue interventions) are now being increasingly more propagated. Resection arthroplasty of the first midfoot ray has major biomechanical disadvantages so that it is not surprising that reconstructive procedures are given priority. In patients with severe arthritic destruction of the first metatarsophalangeal joint, arthrodesis has substantial biomechanical advantages compared to resection arthroplasty. Nevertheless, it has not yet been confirmed that fusion leads to superior clinical results.

  2. Ice Core Dating Software for Interactive Dating of Ice Cores

    NASA Astrophysics Data System (ADS)

    Kurbatov, A. V.; Mayewski, P. A.; Abdul Jawad, B. S.

    2005-12-01

    Scientists involved in ice core dating are well familiar with the problem of identification and recording the depth of annual signals using stable isotopes, glaciochemistry, ECM (electrical conductivity), DEP (dielectric properties) and particle counter data. Traditionally all parameters used for ice core dating were plotted as a function of depth, printed and after years were marked on the paper, converted to depth vs. age time scale. To expedite this tedious and manual process we developed interactive computer software, Ice core Dating (ICD) program. ICD is written in Java programming language, and uses GPL and GPL site licensed graphic libraries. The same 3.5 Mb in size pre-compiled single jar file, that includes all libraries and application code, was successfully tested on WinOS, Mac OSX, Linux, and Solaris operating systems running Java VM version 1.4. We have followed the modular design philosophy in our source code so potential integration with other software modules, data bases and server side distributed computer environments can be easily implemented. We expect to continue development of new suites of tools for easy integration of ice core data with other available time proxies. ICD is thoroughly documented and comes with a technical reference and cookbook that explains the purpose of the software and its many features, and provides examples to help new users quickly become familiar with the operation and philosophy of the software. ICD is available as a free download from the Climate Change Institute web site ( under the terms of GNU GPL public license.

  3. Global organization of tectonic deformation on Venus

    NASA Technical Reports Server (NTRS)

    Bilotti, Frank; Connors, Chris; Suppe, John

    1993-01-01

    The geographic organization of surface deformation on Venus as on Earth is a key to understanding the global tectonic system. To date we have mapped the distribution of three unambiguous tectonic land forms on Venus: (1) linear foldbelts analogous to those at plate margins of the Earth; (2) linear rift zones, analogous to continental rifts on the Earth; and (3) distributed plains deformation in the form of wrinkle ridges and extensional faults and fractures. The linear foldbelts are the dominant structural style in the Northern Hemisphere; ninety percent of the planet's foldbelts lie above the equator. In contrast, compressive deformation in the Southern Hemisphere is dominated by two large, sweeping patterns of wrinkle ridges. The two hemispheres are divided by an equatorial region that is largely covered by rift zones and several large tessera blocks. A tectonic model of generally poleward convergence of the Northern Hemisphere explains the distribution of foldbelts and rift zones. In our model, a northern hemispherical plate (or system of plates) moves poleward and deforms along discrete, predominately longitudinal bands. We recognize four types of foldbelts based on their relationships to other large-scale tectonic features on Venus. There are foldbelts that lie within the low plains, foldbelts associated with coronae, novae and chasmata, foldbelts that lie at the margins of poly-deformed tessera plateaus, and the folded mountain belts around Lakshmi Planum. We see a geometric increase in the area of fold belts when normalized to percent area at a given latitude. This increase is consistent with our model of poleward convergence. Also, the orientations of most foldbelts are either approximately north-south or parallel to lines of latitude in the northern hemisphere. This observation is also consistent with the model in that the longitudinal bands are the result of the decreasing area of the sphere as the plate moves poleward and the latitudinal belts are the

  4. 31 CFR 536.302 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NARCOTICS TRAFFICKING SANCTIONS REGULATIONS General... of specially designated narcotics traffickers designated after that date, the earlier of the date...

  5. 31 CFR 536.302 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NARCOTICS TRAFFICKING SANCTIONS REGULATIONS General... of specially designated narcotics traffickers designated after that date, the earlier of the date...

  6. 31 CFR 536.302 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NARCOTICS TRAFFICKING SANCTIONS REGULATIONS General... of specially designated narcotics traffickers designated after that date, the earlier of the date...

  7. 31 CFR 536.302 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NARCOTICS TRAFFICKING SANCTIONS REGULATIONS General... of specially designated narcotics traffickers designated after that date, the earlier of the date...

  8. 31 CFR 536.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NARCOTICS TRAFFICKING SANCTIONS REGULATIONS General... of specially designated narcotics traffickers designated after that date, the earlier of the date...

  9. Diatexite Deformation and Magma Extraction on Kangaroo Island, South Australia

    NASA Astrophysics Data System (ADS)

    Hasalova, Pavlina; Weinberg, Roberto; Ward, Lindsay; Fanning, Mark

    2013-04-01

    Migmatite terranes are structurally complex because of strong rheological contrast between layers with different melt contents and because of magma migration leading to volume changes. Migmatite deformation is intimately linked with magma extraction and the origin of granitoids. We investigate here the relationships between an evolving deformation and magma extraction in migmatites formed during the ca. 500Ma Delamerian orogeny, exposed on Kangaroo Island, South Australia. Here, several phases of deformation occurred in the presence of melt. During an early upright, non-cylindrical folding event, magma was channeled towards the hinge zones of antiforms. Funnel-shaped networks of leucosomes form a root zone that link up towards a central axial planar channel, forming the main magma extraction paths during folding. Extraction was associated with fold limb collapse, and antiformal hinge disruption by magma accumulation and transfer. During a later deformation phase, melt-rich diatexites were deformed, and schollen were disaggregated into smaller blocks and schlieren, and deformed into asymmetric, sigmoidal shapes indicative of dextral shearing flow. During flow, magma accumulated preferentially along shear planes, indicating a dilatational component during shearing (transtension) and in strain shadows of schollen. As deformation waned, magma extraction from these diatexites gave rise to N-trending, steeply dipping, funnel-shaped channels not associated to any deformational feature. The funnel-shape of these structures indicates the direction of magma flow. Structures developed during this phase are comparable with those formed during dewatering of soft sediments. Despite a high degree of complexity, magma migration and extraction features record distinct responses to the evolving deformation which can be used to understand deformation, and nature and direction of melt extraction. The oldest and youngest magmatic rocks from migmatites were dated (U-Pb monazite, SHRIMP

  10. Radiocarbon dating of biogenetic opal.

    PubMed

    Wilding, L P

    1967-04-07

    Approximately 75 grams of biogenetic opal were isolated from 45 kilograms of soil by employing gross particle-size and sink-float specific gravity fractionation procedures. After pretreatment of the sample to remove extraneous organic and inorganic carbon contaminants, the carbon occluded within opal phytoliths was dated at 13,300 +/- 450 years before the present. Therefore, biogenetic opal is stable for relatively long periods.

  11. [Spectrum research on metamorphic and deformation of tectonically deformed coals].

    PubMed

    Li, Xiao-Shi; Ju, Yi-Wen; Hou, Quan-Lin; Lin, Hong

    2011-08-01

    The structural and compositive evolution of tectonically deformed coals (TDCs) and their influencing factors were investigated and analyzed in detail through Fourier transform infrared spectroscopy (FTIR) and laser Raman spectra analysis. The TDC samples (0.7% < Ro,max <3.1%) were collected from Huaibei coalfield with different deformation mechanisms and intensity. The FTIR of TDCs shows that the metamorphism and the deformation affect the degradation and polycondensation process of macromolecular structure to different degree. The Raman spectra analysis indicates that secondary structure defects can be produced mainly by structural deformation, also the metamorphism influences the secondary structure defects and aromatic structure. Through comprehensive analysis, it was discussed that the ductile deformation could change to strain energy through the increase and accumulation of dislocation in molecular structure units of TDC, and it could make an obvious influence on degradation and polycondensation. While the brittle deformation could change to frictional heat energy and promote the metamorphism and degradation of TDC structure, but has less effect on polycondensation. Furthermore, degradation is the main reason for affecting the structural evolution of coal in lower metamorphic stage, and polycondensation is the most important controlling factor in higher metamorphic stage. Under metamorphism and deformation, the small molecules which break and fall off from the macromolecular tructure of TDC are preferentially replenished and embedded into the secondary structure defects or the residual aromatic rings were formed into aromatic structure by polycondensation. This process improved the stability of coal structure. It is easier for ductile deformation of coal to induce the secondary structure defects than brittle deformation.

  12. Ruthenium Aluminides: Deformation Mechanisms and Substructure Development

    SciTech Connect

    Tresa M. Pollock

    2005-05-11

    Structural and functional materials that can operate in severe, high temperature environments are key to the operation of a wide range of energy generation systems. Because continued improvements in the energy efficiency of these systems is critical, the need for new materials with higher temperature capabilities is inevitable. Intermetallic compounds, with strong bonding and generally high melting points offer this possibility for a broad array of components such as coatings, electrode materials, actuators and/or structural elements. RuAl is a very unusual intermetallic compound among the large number of B2compounds that have been identified and investigated to date. This material has a very high melting temperature of 2050?C, low thermal expansion, high thermal conductivity and good corrosion resistance. Unlike most other high temperature B2 intermetallics, RuAl possesses good intrinsic deformability at low temperatures. In this program fundamental aspects of low and high temperature mechanical properties and deformation mechanisms in binary and higher order RuAl-based systems have been investigated. Alloying additions of interest included platinum, boron and niobium. Additionally, preliminary studies on high temperature oxidation behavior of these materials have been conducted.

  13. Continuum Mechanics Based Bi-linear Shear Deformable Shell Element Using Absolute Nodal Coordinate Formulation

    DTIC Science & Technology

    2014-03-07

    the convergent solution in the case of the continuum mechanics based bi- linear shear deformable ANCF shell element. 5.3 Slit Annular Plate Subjected...UNCLASSIFIED: Distribution Statement A. Approved for public release. #24515 CONTINUUM MECHANICS BASED BI- LINEAR SHEAR DEFORMABLE SHELL ELEMENT...MAR 2014 2. REPORT TYPE Technical Report 3. DATES COVERED 07-01-2014 to 04-03-2014 4. TITLE AND SUBTITLE CONTINUUM MECHANICS BASED BI- LINEAR

  14. Diatexite Deformation and Magma Extraction on Kangaroo Island, South Australia

    NASA Astrophysics Data System (ADS)

    Hasalova, P.; Weinberg, R. F.; Ward, L.; Fanning, C. M.

    2012-12-01

    Migmatite terranes are structurally complex. We have investigated the relationships between deformation and magma extraction in migmatites formed during the Delamerian orogeny on Kangaroo Island. Several phases of deformation occurred in the presence of melt (D1-D4) and we describe how magma segregation, accumulation and extraction changes with deformation style. During an early upright folding event (D2), magma was channelled towards the hinge of antiforms. Funnel-shaped networks of leucosomes form a root that link towards a central axial planar channel, marking the main magma extraction paths. Extraction was associated with limb collapse, and antiformal hinge disruption. During a later deformation phase (D4), diatexites were sheared so that schollen were disaggregated into smaller blocks and schlieren, and deformed into asymmetric, sigmoidal shapes. Foliations in the magmatic matrix and schollen asymmetry indicate dextral shearing. During flow, magma accumulated in shear planes, indicating a dilational component during shearing (transtension) and on strain shadows of schollen. As deformation waned (post-D4), magma extraction from these diatexites gave rise to steeply dipping, funnel-shaped channels, similar to those developed during folding. The funnel-shape networks are interpreted as magma extraction networks and indicate magma flow direction. Structures developed during this phase are comparable with those developed during dewatering of soft sediments. The magmatic rocks from migmatites formed early, during folding, and formed late after deformation waned were dated. Both have two monazite (U-Pb, SHRIMP) age groups of ~490Ma and ~505-520Ma. The older sample has a well-defined peak at 505-510Ma and trails into the younger ages. The younger sample has the opposite, with few old spots and a well-defined young peak at ~490Ma. The age range indicates the duration of anatexis, and well-defined peaks are interpreted to mark the age of individual magma batch

  15. School Counselors' Role in Dating Violence Intervention

    ERIC Educational Resources Information Center

    Craigen, Laurie M.; Sikes, April; Healey, Amanda; Hays, Danica

    2009-01-01

    Dating violence among adolescents is a major public health concern. The purpose of this paper is to examine five factors of which school counselors must be aware in order to recognize, intervene, and report incidence of dating violence. These factors are (a) understanding the diverse definitions of dating violence, (b) recognizing dating violence…

  16. 24 CFR 1710.21 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... developer in writing prior to such 30th day that: (1) The effective date has been suspended in accordance... date by developer. (1) A developer, or owner, may request that the effective date of its Statement of... shall be suspended as of the date the request was executed by the developer or owner. (3) The...

  17. 31 CFR 575.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 575.302 Section 575.302 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF....302 Effective date. The term effective date refers to the effective date of the applicable...

  18. 31 CFR 539.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 539.302 Section 539... General Definitions § 539.302 Effective date. The term effective date means the “effective date” specified... foreign person. This date is listed after the name of each designated foreign person in appendix I to...

  19. 19 CFR 351.701 - Applicability dates.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 3 2010-04-01 2010-04-01 false Applicability dates. 351.701 Section 351.701... DUTIES Applicability Dates § 351.701 Applicability dates. The regulations contained in this part 351... governed by the regulations in effect on the date the petitions were filed or requests were made for...

  20. 31 CFR 538.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 538.302 Section 538.302 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF... § 538.302 Effective date. The term effective date refers to the effective date of the...

  1. 10 CFR 2.807 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Effective date. 2.807 Section 2.807 Energy NUCLEAR... § 2.807 Effective date. The notice of adoption of a regulation will specify the effective date... relieving from restrictions, will be made not less than thirty (30) days prior to the effective date...

  2. 31 CFR 597.305 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 597.305 Section 597... General Definitions § 597.305 Effective date. Except as that term is used in § 597.201(d), the term effective date refers to the effective date of the applicable prohibitions and directives contained in...

  3. 11 CFR 7.28 - Hearing date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 11 Federal Elections 1 2010-01-01 2010-01-01 false Hearing date. 7.28 Section 7.28 Federal... for Administrative Enforcement Proceedings § 7.28 Hearing date. (a) Setting of date by examiner. The examiner shall set the hearing at a reasonable time, date, and place. (b) Considerations....

  4. 18 CFR 11.7 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Effective date. 11.7... Dams § 11.7 Effective date. All annual charges imposed under this subpart will be computed beginning on the effective date of the license unless some other date is fixed in the license....

  5. 31 CFR 585.301 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 585.301 Section 585.301 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF... General Definitions § 585.301 Effective date. The term effective date refers to the effective date of...

  6. 31 CFR 560.301 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 560.301 Section 560... § 560.301 Effective date. The effective date of the prohibitions and directives contained in subpart B of this part is 12:01 a.m., Eastern Daylight Time, August 20, 1997. For the effective date of...

  7. 7 CFR 987.5 - Dates.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Dates. 987.5 Section 987.5 Agriculture Regulations of... Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE DOMESTIC DATES PRODUCED OR PACKED IN RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.5 Dates. Dates means the...

  8. 10 CFR 784.13 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... effective date of the contract, on the effective date of the contract, even though the advance waiver may...., inventions conceived or first actually reduced to practice after the effective date of the contract, on the... OF ENERGY PATENT WAIVER REGULATION § 784.13 Effective dates. Waivers shall be effective on...

  9. 10 CFR 784.13 - Effective dates.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... effective date of the contract, on the effective date of the contract, even though the advance waiver may...., inventions conceived or first actually reduced to practice after the effective date of the contract, on the... OF ENERGY PATENT WAIVER REGULATION § 784.13 Effective dates. Waivers shall be effective on...

  10. 10 CFR 784.13 - Effective dates.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... effective date of the contract, on the effective date of the contract, even though the advance waiver may...., inventions conceived or first actually reduced to practice after the effective date of the contract, on the... OF ENERGY PATENT WAIVER REGULATION § 784.13 Effective dates. Waivers shall be effective on...

  11. 10 CFR 784.13 - Effective dates.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... effective date of the contract, on the effective date of the contract, even though the advance waiver may...., inventions conceived or first actually reduced to practice after the effective date of the contract, on the... OF ENERGY PATENT WAIVER REGULATION § 784.13 Effective dates. Waivers shall be effective on...

  12. 10 CFR 784.13 - Effective dates.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... effective date of the contract, on the effective date of the contract, even though the advance waiver may...., inventions conceived or first actually reduced to practice after the effective date of the contract, on the... OF ENERGY PATENT WAIVER REGULATION § 784.13 Effective dates. Waivers shall be effective on...

  13. Perceptual transparency from image deformation

    PubMed Central

    Kawabe, Takahiro; Maruya, Kazushi; Nishida, Shin’ya

    2015-01-01

    Human vision has a remarkable ability to perceive two layers at the same retinal locations, a transparent layer in front of a background surface. Critical image cues to perceptual transparency, studied extensively in the past, are changes in luminance or color that could be caused by light absorptions and reflections by the front layer, but such image changes may not be clearly visible when the front layer consists of a pure transparent material such as water. Our daily experiences with transparent materials of this kind suggest that an alternative potential cue of visual transparency is image deformations of a background pattern caused by light refraction. Although previous studies have indicated that these image deformations, at least static ones, play little role in perceptual transparency, here we show that dynamic image deformations of the background pattern, which could be produced by light refraction on a moving liquid’s surface, can produce a vivid impression of a transparent liquid layer without the aid of any other visual cues as to the presence of a transparent layer. Furthermore, a transparent liquid layer perceptually emerges even from a randomly generated dynamic image deformation as long as it is similar to real liquid deformations in its spatiotemporal frequency profile. Our findings indicate that the brain can perceptually infer the presence of “invisible” transparent liquids by analyzing the spatiotemporal structure of dynamic image deformation, for which it uses a relatively simple computation that does not require high-level knowledge about the detailed physics of liquid deformation. PMID:26240313

  14. A simulation study of planar swaging deformation

    NASA Astrophysics Data System (ADS)

    Zhang, Cheng-Gen; Jen, Gwang-Shen; Su, Gwang-Huei

    1992-08-01

    Planar swaging deformation was studied with a photoplastic method. The domestic polycarbonate was used as a simulation material. The full-field strain distribution for planar swaging deformation was obtained. The average error of the calculated strain was less than 7 percent. The deformation area and the effect of friction on deformation area were studied with the characteristics of photoplasticity. This paper points out the special features of planar swaging deformation and the effect of lubrication on deformation flow.

  15. Femoral deformity planning: intentional placement of the apex of deformity.

    PubMed

    Fabricant, Peter D; Camara, James M; Rozbruch, S Robert

    2013-05-01

    Traditionally, correction of femoral deformity has been performed with osteotomies through the center of rotation of angulation (CORA), but the CORA location is not always practical. If the osteotomy is created at a site adjacent to the CORA, an additional translation must be performed to accurately correct the deformity. However, at times, the ideal osteotomy site may require an unfeasible amount of translation. Multiple osteotomies may also be problematic, and when overcorrection of the mechanical axis is planned, the CORA method is not practical.This article describes a novel method by which the surgeon may choose the location of the osteotomy regardless of the location of the CORA and may consolidate a multiapical deformity into a single corrective osteotomy. Furthermore, intentional mechanical axis overcorrection may be performed to unload knee joint arthritis. Simple, complex, and multiapical deformities may now be corrected via a single familiar surgical procedure, such as a distal femoral osteotomy, and the need for translation is eliminated.

  16. Videogrammetric Model Deformation Measurement Technique

    NASA Technical Reports Server (NTRS)

    Burner, A. W.; Liu, Tian-Shu

    2001-01-01

    The theory, methods, and applications of the videogrammetric model deformation (VMD) measurement technique used at NASA for wind tunnel testing are presented. The VMD technique, based on non-topographic photogrammetry, can determine static and dynamic aeroelastic deformation and attitude of a wind-tunnel model. Hardware of the system includes a video-rate CCD camera, a computer with an image acquisition frame grabber board, illumination lights, and retroreflective or painted targets on a wind tunnel model. Custom software includes routines for image acquisition, target-tracking/identification, target centroid calculation, camera calibration, and deformation calculations. Applications of the VMD technique at five large NASA wind tunnels are discussed.

  17. Control of micromachined deformable mirrors

    NASA Technical Reports Server (NTRS)

    Agronin, M. L.; Bartman, R.; Hadaegh, F. Y.; Kaiser, W.; Wang, P. K. C.

    1993-01-01

    A micromachined deformable mirror with pixelated electrostatic actuators is proposed. The paper begins with a physical description of the proposed mirror. Then a mathematical model in the form of a nonlinear partial differential equation describing the mirror surface deformations is derived. This model is used to derive the required voltages for the actuators to achieve a specified static deformation of the mirror surface. This is followed by the derivation of a static nonlinear feedback controller for achieving noninteracting actuation. Then the structure for a complete control system for wavefront correction is proposed. The paper concludes with a discussion of the physical implementation of the proposed control system.

  18. Radioactive dating of the elements

    NASA Technical Reports Server (NTRS)

    Cowan, John J.; Thielemann, Friedrich-Karl; Truran, James W.

    1991-01-01

    The extent to which an accurate determination of the age of the Galaxy, and thus a lower bound on the age of the universe, can be obtained from radioactive dating is discussed. Emphasis is given to the use of the long-lived radioactive nuclei Re-187, Th-232, U-238, and U-235. The nature of the production sites of these and other potential Galactic chronometers is examined along with their production ratios. Age determinations from models of nucleocosmochronology are reviewed and compared with age determination from stellar sources and age constraints form cosmological considerations.

  19. Birthday and date of death.

    PubMed Central

    Angermeyer, M C; Kühn, L; Osterwald, P

    1987-01-01

    The relation between birthday and date of death has so far been studied from two different perspectives: birthdays were either conceived of as emotionally invested deadlines motivating people to ward off their death which causes a 'dip' in death rates before their birthday, or they were considered as stressful events leading to an increase of mortality on or after their birthday. Using a collection of biographies of famous people from the whole world and another of well-known Swiss citizens we tested hypotheses derived from these assumptions. Neither the 'death-dip' hypotheses nor the 'birthday stress' hypothesis was supported by our results. PMID:3655631

  20. 400My of Deformation Along Tibet Active Strike Slip Faults

    NASA Astrophysics Data System (ADS)

    Arnaud, N. O.

    2003-12-01

    While it is widely accepted that strike slip faults in Tibet accommodate a significant part of the tertiary convergence between India and Asia, the true Cenozoic magnitude of the offset is still largely debated. Direct dating of Cenozoic piercing points is the most powerful tool to assess the total offset, but their use is not always possible. Therefore one gets to use older markers although this leads to significant results ONLY at the supreme condition that pre-Cenozoic movement of those markers be accurately known. The Kunlun and Altyn Tagh faults for example form a prominent example of Tibetan presently active fault, but they also constitute geological frontiers between blocks of different geological histories accreted at various times since early Paleozoic. One may thus question how much of the visible offset is indeed Cenozoic. Although deformation facies agree with recent kinematics, multi-geochronological approach indicates a series of events from 280-230 Ma to 120+/-10 Ma. The former may be linked either with suturing of the Qiantang and Kunlun blocks farther to the south, or collision further to the north or east in the Qilian Shan and Bei Shan ranges, while the latter range appears to be growing in importance with ongoing work but is still largely unexplained. Oblique subductions of collision to the north of the Qilian Shan are adequate candidates. Argon loss suggests that deformation was associated to a 250-300° C thermal pulse that lasted 5 to 20 Ma after the onset of movement (Arnaud et al., 2003). Unroofing on all faults occurred much later, around 25 Ma ago when sudden cooling suggests a component of normal faulting (Mock et al., 1999). Strong inheritage was also found along the Ghoza active fault, in central western Tibet. Of course the fact that some of the deformation is much older than the Cretaceous and shares compatible deformation criteria with the present-day deformation leads to false appreciation of the pure Cenozoic offset, potentially

  1. Variable focal length deformable mirror

    DOEpatents

    Headley, Daniel; Ramsey, Marc; Schwarz, Jens

    2007-06-12

    A variable focal length deformable mirror has an inner ring and an outer ring that simply support and push axially on opposite sides of a mirror plate. The resulting variable clamping force deforms the mirror plate to provide a parabolic mirror shape. The rings are parallel planar sections of a single paraboloid and can provide an on-axis focus, if the rings are circular, or an off-axis focus, if the rings are elliptical. The focal length of the deformable mirror can be varied by changing the variable clamping force. The deformable mirror can generally be used in any application requiring the focusing or defocusing of light, including with both coherent and incoherent light sources.

  2. ROCK DEFORMATION. Final Progress Report

    SciTech Connect

    2002-05-24

    The Gordon Research Conference (GRC) on ROCK DEFORMATION was held at II Ciocco from 5/19/02 thru 5/24/02. Emphasis was placed on current unpublished research and discussion of the future target areas in this field.

  3. Deformity of Ears and Kidneys

    PubMed Central

    Taylor, W. C.

    1965-01-01

    Ten children with gross deformity of the external ear were observed. In six the facial bones were underdeveloped on the same side as the deformed ear. In all six there was a congenital abnormality of the kidney or upper urinary tract, usually on the same side as the deformed ear. In addition there were usually other associated congenital defects in each case. In the remaining four children the facial bones appeared normal, and pyelography showed no abnormality of the urinary tract. In these four children there were no other associated defects. These observations emphasize the importance of investigating the urinary tract in children with gross deformity of the external ear, especially where there is an associated underdevelopment of the facial bones. PMID:14317453

  4. Anisotropic ripple deformation in phosphorene

    DOE PAGES

    Kou, Liangzhi; Ma, Yandong; Smith, Sean C.; ...

    2015-04-07

    Here, two-dimensional materials tend to become crumpled according to the Mermin-Wagner theorem, and the resulting ripple deformation may significantly influence electronic properties as observed in graphene and MoS2. Here, we unveil by first-principles calculations a new, highly anisotropic ripple pattern in phosphorene, a monolayer black phosphorus, where compression-induced ripple deformation occurs only along the zigzag direction in the strain range up to 10%, but not the armchair direction. This direction-selective ripple deformation mode in phosphorene stems from its puckered structure with coupled hinge-like bonding configurations and the resulting anisotropic Poisson ratio. We also construct an analytical model using classical elasticitymore » theory for ripple deformation in phosphorene under arbitrary strain. The present results offer new insights into the mechanisms governing the structural and electronic properties of phosphorene crucial to its device applications.« less

  5. Anisotropic ripple deformation in phosphorene

    SciTech Connect

    Kou, Liangzhi; Ma, Yandong; Smith, Sean C.; Chen, Changfeng

    2015-04-07

    Here, two-dimensional materials tend to become crumpled according to the Mermin-Wagner theorem, and the resulting ripple deformation may significantly influence electronic properties as observed in graphene and MoS2. Here, we unveil by first-principles calculations a new, highly anisotropic ripple pattern in phosphorene, a monolayer black phosphorus, where compression-induced ripple deformation occurs only along the zigzag direction in the strain range up to 10%, but not the armchair direction. This direction-selective ripple deformation mode in phosphorene stems from its puckered structure with coupled hinge-like bonding configurations and the resulting anisotropic Poisson ratio. We also construct an analytical model using classical elasticity theory for ripple deformation in phosphorene under arbitrary strain. The present results offer new insights into the mechanisms governing the structural and electronic properties of phosphorene crucial to its device applications.

  6. Anisotropic Ripple Deformation in Phosphorene.

    PubMed

    Kou, Liangzhi; Ma, Yandong; Smith, Sean C; Chen, Changfeng

    2015-05-07

    Two-dimensional materials tend to become crumpled according to the Mermin-Wagner theorem, and the resulting ripple deformation may significantly influence electronic properties as observed in graphene and MoS2. Here, we unveil by first-principles calculations a new, highly anisotropic ripple pattern in phosphorene, a monolayer black phosphorus, where compression-induced ripple deformation occurs only along the zigzag direction in the strain range up to 10%, but not the armchair direction. This direction-selective ripple deformation mode in phosphorene stems from its puckered structure with coupled hinge-like bonding configurations and the resulting anisotropic Poisson ratio. We also construct an analytical model using classical elasticity theory for ripple deformation in phosphorene under arbitrary strain. The present results offer new insights into the mechanisms governing the structural and electronic properties of phosphorene crucial to its device applications.

  7. Online dating and conjugal bereavement.

    PubMed

    Young, Goldthwaite Dannagal; Caplan, Scott E

    2010-08-01

    This study examined self-presentation in the online dating profiles of 241 widowed and 280 divorced individuals between 18 and 40 years old. A content analysis of open-ended user-generated profiles assessed the presence or absence of various themes, including the user's marital status, the backstory of their lost relationship, and whether they engaged in sense-making regarding that lost relationship. Results indicated that about one-third of widowed individuals discussed their loss in their profiles. In addition, about one-third of the widowed profiles included explicit reference to a philosophy of life, and about 16% mentioned sense-making or cognitive reappraisals of their bereavement. Many profiles included some articulation of a vision of a future partnership. Results also revealed a significant correlation between widowed individuals including a backstory and their likelihood of exhibiting sense-making in their profiles. Finally, unlike the widowed users, divorcees provided much briefer mentions of their lost relationships, used less sense-making language, and were less likely to articulate an explicit vision of future partnerships. Overall, the results suggest that for widowed individuals, online dating sites may function as venues to explore their past experiences and engage in the construction of a post-loss identity or a post-loss "ideal self".

  8. Plastic Deformation of Granular Materials

    DTIC Science & Technology

    1993-01-25

    discontinuities. These result will be important in our granular flow work, when considering viscoplastic constitutive relations (i.e. relaxation systems...5 CUNDN( NUMRES Plastic Deformation of Granular Materials (U) 61102F 6. AUTHOR(S) 2304/A4 Dr. E. Bruce Pitman 7 PERFORMING ORGANIZATION NA .h • 8...lose hyperbolicity. 98 3 81 061! SUBJECT TERMS 15. NUMBER OF PAGES granular material ; plastic deformation; hyperbolic 12 equations 16. PRICE CODE 17

  9. Cleft Nasal Deformity and Rhinoplasty

    PubMed Central

    Kaufman, Yoav; Buchanan, Edward P.; Wolfswinkel, Erik M.; Weathers, William M.; Stal, Samuel

    2012-01-01

    The cleft nasal deformity is a complex challenge in plastic surgery involving the skin, cartilage, mucosa, and skeletal platform. Ever since Blair and Brown first described the intricacies of the cleft pathology in 1931, the appropriate approach has been extensively debated in the literature with respect to timing, technique, and extent of surgical intervention. In this article, the authors review the literature and summarize the various modalities for achieving a successful rhinoplasty in the patient with a cleft nasal deformity. PMID:24179452

  10. Resetting Monazite Dates by Fluid Moderated Coupled Dissolution-Reprecipitation

    NASA Astrophysics Data System (ADS)

    Williams, M. L.; Jercinovic, M. J.; Harlov, D. E.; Budzyn, B.

    2009-12-01

    Monazite has increasingly been used as a geochronometer, especially in deformed and metamorphosed rocks. Monazite is appropriate for this application because it has a very broad compositional range, and can be produced in a number of chemical reactions. Because diffusion is slow, monazite compositions tend to be preserved as core and rim domains. Ideally, the compositional and textural domains can be linked with structural fabrics and/or metamorphic reactions and thus, provide a means of directly dating the deformation events or metamorphic reactions. The use of multidomain monazite to constrain stages in a P-T history depends on the assumption that compositions and ages are essentially unmodified during subsequent events. Although closure temperatures are certainly high, recent studies suggest that under some circumstances, monazite compositions (and possibly dates) can be modified by fluid-moderated coupled dissolution-reprecipitation processes. This is particularly important for geochronologic studies because the replacement process may not involve the complete removal of some components, such as Pb, and thus spurious dates, either older or younger than the true age, could possibly result. We show results of one experimental investigation in which the starting monazite was strikingly altered to a new monazite composition by solid state dissolution-reprecipitation processes. In some grains, the new monazite occurs in regular domains near the grain boundaries, and might be misinterpreted as overgrowths. In other grains, new monazite occurs internally, near inclusions or microfractures or as irregular patchy domains. Altered domains are generally distinctive and distinguishable from growth domains. The new compositions are extremely uniform from grain to grain (Th: initial= 7.0 wt. %; altered = 2.0 wt%). The altered monazite domains are free of Pb. Thus, at least in this example, the monazite date was essentially reset to zero. The results suggest that it is

  11. Progressive deformation of feldspar recording low-barometry impact processes, Tenoumer impact structure, Mauritania

    NASA Astrophysics Data System (ADS)

    Jaret, Steven J.; Kah, Linda C.; Harris, R. Scott

    2014-06-01

    The Tenoumer impact structure is a small, well-preserved crater within Archean to Paleoproterozoic amphibolite, gneiss, and granite of the Reguibat Shield, north-central Mauritania. The structure is surrounded by a thin ejecta blanket of crystalline blocks (granitic gneiss, granite, and amphibolite) and impact-melt rocks. Evidence of shock metamorphism of quartz, most notably planar deformation features (PDFs), occurs exclusively in granitic clasts entrained within small bodies of polymict, glass-rich breccia. Impact-related deformation features in oligoclase and microcline grains, on the other hand, occur both within clasts in melt-breccia deposits, where they co-occur with quartz PDFs, and also within melt-free crystalline ejecta, in the absence of co-occurring quartz PDFs. Feldspar deformation features include multiple orientations of PDFs, enhanced optical relief of grain components, selective disordering of alternate twins, inclined lamellae within alternate twins, and combinations of these individual textures. The distribution of shock features in quartz and feldspar suggests that deformation textures within feldspar can record a wide range of average pressures, starting below that required for shock deformation of quartz. We suggest that experimental analysis of feldspar behavior, combined with detailed mapping of shock metamorphism of feldspar in natural systems, may provide critical data to constrain energy dissipation within impact regimes that experienced low average shock pressures.

  12. Retrospective Birth Dating of Cells

    SciTech Connect

    L.Spalding, K; Bhardwaj, R D; Buchholz, B A; Druid, H; Frisen, J

    2005-04-19

    The generation of cells in the human body has been difficult to study and our understanding of cell turnover is limited. Extensive testing of nuclear weapons resulted in a dramatic global increase in the levels of the isotope {sup 14}C in the atmosphere, followed by an exponential decrease after the test ban treaty in 1963. We show that the level of {sup 14}C in genomic DNA closely parallels atmospheric levels, and can be used to establish the time point when the DNA was synthesized and cells were born. We use this strategy to determine the age of cells in the cortex of the adult human brain, and show that whereas non-neuronal cells are exchanged, occipital neurons are as old as the individual, supporting the view that postnatal neurogenesis does not take place in this region. Retrospective birth dating is a generally applicable strategy that can be used to measure cell turnover in man under physiological and pathological conditions.

  13. Sexual assault in dating relationships.

    PubMed

    Rhynard, J; Krebs, M; Glover, J

    1997-03-01

    This article focuses on acquaintance rape, which under Canadian law constitutes a form of sexual assault. Frequency of acquaintance rape often is underestimated due to under-reporting, resulting in a local perception that acquaintance rape rarely occurs in a small Canadian community. A survey was conducted to determine whether acquaintance rape does occur in this community. One hundred sixty-four male and female students from grades 8-12 completed a questionnaire. Twenty-six percent of respondents reported being forced into some type of sexual activity. Based on the survey, this article explores the type of force used, the relationship between acquaintance rape and use of alcohol and drugs, and the relationship between acquaintance rape and the ability to indicate to a partner to stop a behavior. Results confirmed a need to develop programs to prevent rather than merely respond to issues of sexual assault on a date.

  14. Analysis of Mining Terrain Deformation Characteristics with Deformation Information System

    NASA Astrophysics Data System (ADS)

    Blachowski, Jan; Milczarek, Wojciech; Grzempowski, Piotr

    2014-05-01

    Mapping and prediction of mining related deformations of the earth surface is an important measure for minimising threat to surface infrastructure, human population, the environment and safety of the mining operation itself arising from underground extraction of useful minerals. The number of methods and techniques used for monitoring and analysis of mining terrain deformations is wide and increasing with the development of geographical information technologies. These include for example: terrestrial geodetic measurements, global positioning systems, remote sensing, spatial interpolation, finite element method modelling, GIS based modelling, geological modelling, empirical modelling using the Knothe theory, artificial neural networks, fuzzy logic calculations and other. The aim of this paper is to introduce the concept of an integrated Deformation Information System (DIS) developed in geographic information systems environment for analysis and modelling of various spatial data related to mining activity and demonstrate its applications for mapping and visualising, as well as identifying possible mining terrain deformation areas with various spatial modelling methods. The DIS concept is based on connected modules that include: the spatial database - the core of the system, the spatial data collection module formed by: terrestrial, satellite and remote sensing measurements of the ground changes, the spatial data mining module for data discovery and extraction, the geological modelling module, the spatial data modeling module with data processing algorithms for spatio-temporal analysis and mapping of mining deformations and their characteristics (e.g. deformation parameters: tilt, curvature and horizontal strain), the multivariate spatial data classification module and the visualization module allowing two-dimensional interactive and static mapping and three-dimensional visualizations of mining ground characteristics. The Systems's functionality has been presented on

  15. Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

    NASA Astrophysics Data System (ADS)

    Kaercher, P. M.; Zepeda-Alarcon, E.; Prakapenka, V.; Kanitpanyacharoen, W.; Smith, J.; Sinogeikin, S. V.; Wenk, H. R.

    2014-12-01

    The crystal structure of the high pressure SiO2 polymorph stishovite has been studied in detail, yet little is known about its deformation mechanisms. Information about how stishovite deforms under stress is important for understanding subduction of quartz-bearing crustal rocks into the mantle. Particularly, stishovite is elastically anisotropic and thus development of crystallographic preferred orientation (CPO) during deformation may contribute to seismic anomalies in the mantle. We converted a natural sample of flint to stishovite in a laser heated diamond anvil cell and compressed the stishovite aggregate up to 38 GPa. Diffraction patterns were collected in situ in radial geometry at the Advanced Light Source (ALS) and the Advanced Photon Source (APS) to examine development of CPO during deformation. We find that (001) poles preferentially align with the compression direction and infer deformation mechanisms leading to the observed CPO with visco-plastic self consistent (VPSC) polycrystal plasticity models. Our results show pyramidal and basal slip are most likely active at high pressure and ambient temperature, in agreement with transmission electron microscopy (TEM) studies of rutile (TiO2) and paratellurite (TeO2), which are isostructural to stishovite. Conversely other TEM studies of stishovite done at higher temperature suggest dominant prismatic slip. This indicates that a variety of slip systems may be active in stishovite, depending on conditions. As a result, stishovite's contribution to the seismic signature in the mantle may vary as a function of pressure and temperature and thus depth.

  16. Thermoluminescence dating of Hawaiian basalt

    USGS Publications Warehouse

    May, Rodd James

    1979-01-01

    The thermoluminescence (TL) properties of plagioclase separates from 11 independently dated alkalic basalts 4,500 years to 3.3 million years old and 17 tholeiitic basalts 16 years to 450,000 years old from the Hawaiian Islands were investigated for the purpose of developing a TL dating method for young volcanic rocks. Ratios of natural to artificial TL intensity, when normalized for natural radiation dose rates, were used to quantify the thermoluminescence response of individual samples for age-determination purposes. The TL ratios for the alkalic basalt plagioclase were found to increase with age at a predictable exponential rate that permits the use of the equation for the best-fit line through a plot of the TL ratios relative to known age as a TL age equation. The equation is applicable to rocks ranging in composition from basaltic andesite to trachyte over the age range from about 2,000 to at least 250,000 years before present (B.P.). The TL ages for samples older than 50,000 years have a calculated precision of less than :t 10 percent and a potential estimated accuracy relative to potassium-argon ages of approximately :t 10 percent. An attempt to develop a similar dating curve for the tholeiitic basalts was not as successful, primarily because the dose rates are on the average lower than those for the alkalic basalts by a factor of 6, resulting in lower TL intensities in the tholeiitic basalts for samples of equivalent age, and also because the age distribution of dated material is inadequate. The basic TL properties of the plagioclase from the two rock types are similar, however, and TL dating of tholeiitic basalts should eventually be feasible over the age range 10,000 to at least 200,000 years B.P. The average composition of the plagioclase separates from the alkalic basalts ranges from oligoclase to andesine; compositional variations within this range have no apparent effect on the TL ratios. The average composition of the plagioclase from the tholeiitic

  17. Finite deformation analysis of geomaterials

    NASA Astrophysics Data System (ADS)

    Jeremi, Boris; Runesson, Kenneth; Sture, Stein

    2001-07-01

    The mathematical structure and numerical analysis of classical small deformation elasto-plasticity is generally well established. However, development of large deformation elastic-plastic numerical formulation for dilatant, pressure sensitive material models is still a research area.In this paper we present development of the finite element formulation and implementation for large deformation, elastic-plastic analysis of geomaterials. Our developments are based on the multiplicative decomposition of the deformation gradient into elastic and plastic parts. A consistent linearization of the right deformation tensor together with the Newton method at the constitutive and global levels leads toward an efficient and robust numerical algorithm. The presented numerical formulation is capable of accurately modelling dilatant, pressure sensitive isotropic and anisotropic geomaterials subjected to large deformations. In particular, the formulation is capable of simulating the behaviour of geomaterials in which eigentriads of stress and strain do not coincide during the loading process.The algorithm is tested in conjunction with the novel hyperelasto-plastic model termed the B material model, which is a single surface (single yield surface, affine single ultimate surface and affine single potential surface) model for dilatant, pressure sensitive, hardening and softening geomaterials. It is specifically developed to model large deformation hyperelasto-plastic problems in geomechanics.We present an application of this formulation to numerical analysis of low confinement tests on cohesionless granular soil specimens recently performed in a SPACEHAB module aboard the Space Shuttle during the STS-89 mission. We compare numerical modelling with test results and show the significance of added confinement by the thin hyperelastic latex membrane undergoing large stretching.

  18. 40 CFR 62.4671 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Industrial Solid Waste Incineration Units § 62.4671 Effective date. The effective date of this portion of the State's plan applicable to existing commercial and industrial solid waste incineration units is May...

  19. 40 CFR 62.4671 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Industrial Solid Waste Incineration Units § 62.4671 Effective date. The effective date of this portion of the State's plan applicable to existing commercial and industrial solid waste incineration units is May...

  20. 40 CFR 62.9191 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Industrial Solid Waste Incineration Units § 62.9191 Effective date. The effective date of this portion of the State's plan applicable to existing commercial and industrial solid waste incineration units is...

  1. 40 CFR 62.9191 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Industrial Solid Waste Incineration Units § 62.9191 Effective date. The effective date of this portion of the State's plan applicable to existing commercial and industrial solid waste incineration units is...

  2. Peer involvement in adolescent dating violence.

    PubMed

    Stephenson, Pam S; Martsolf, Donna; Draucker, Claire Burke

    2013-06-01

    This study investigated the ways in which peers are involved in adolescent dating violence. Eighty-eight young adults aged 18-21 were interviewed and asked to reflect on aggressive dating relationships they experienced as teens. The researchers used grounded theory to analyze the data. Findings showed that male and female peers were involved in adolescent dating violence in unique ways. Male peers were involved in dating violence by participating in the aggression, agitating the aggression, being the competition, trivializing the aggression, and keeping tabs on the recipient. Female peers were involved in dating violence by deserting the recipient, cheating with the boyfriend, being the audience, needling the male dating partner, and helping the recipient. Male and female peers were involved similarly in adolescent dating violence by confronting the partner. School nurses working with adolescents are uniquely positioned to approach adolescents about dating violence. Interventions aimed at promoting discussions with adolescents are discussed.

  3. 7 CFR 987.13 - Free dates.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.13 Free dates. Free dates means... to acquire them at prices reasonably comparable with prices received domestically) and which are...

  4. When you pass your due date

    MedlinePlus

    ... medlineplus.gov/ency/patientinstructions/000515.htm When you pass your due date To use the sharing features ... link between you and your baby. As you pass your due date, the placenta may not work ...

  5. 16 CFR 1207.2 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... STANDARD FOR SWIMMING POOL SLIDES § 1207.2 Effective date. This part 1207 shall become effective July 17, 1976. All swimming pool slides manufactured after that date must meet the requirements of this...

  6. 16 CFR 1207.2 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... STANDARD FOR SWIMMING POOL SLIDES § 1207.2 Effective date. This part 1207 shall become effective July 17, 1976. All swimming pool slides manufactured after that date must meet the requirements of this...

  7. 16 CFR 1207.2 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... STANDARD FOR SWIMMING POOL SLIDES § 1207.2 Effective date. This part 1207 shall become effective July 17, 1976. All swimming pool slides manufactured after that date must meet the requirements of this...

  8. 16 CFR 1207.2 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... STANDARD FOR SWIMMING POOL SLIDES § 1207.2 Effective date. This part 1207 shall become effective July 17, 1976. All swimming pool slides manufactured after that date must meet the requirements of this...

  9. 16 CFR 1207.2 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... STANDARD FOR SWIMMING POOL SLIDES § 1207.2 Effective date. This part 1207 shall become effective July 17, 1976. All swimming pool slides manufactured after that date must meet the requirements of this...

  10. Teaching the Mathematics of Radioactive Dating.

    ERIC Educational Resources Information Center

    Shea, James H.

    2001-01-01

    Describes a method used to teach the concept of radiometric dating using mathematical equations. Explores the lack of information in textbooks on how to solve radiometric dating problems using mathematical concepts. (SAH)

  11. 40 CFR 62.4626 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Phosphate Fertilizer Plants § 62.4626 Effective date. (a) The effective date of the portion of the plan applicable to phosphate fertilizer plants is July 12, 1982. Fluoride Emissions From Existing Primary...

  12. 40 CFR 62.4626 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Phosphate Fertilizer Plants § 62.4626 Effective date. (a) The effective date of the portion of the plan applicable to phosphate fertilizer plants is July 12, 1982. Fluoride Emissions From Existing Primary...

  13. 40 CFR 62.7102 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Nevada Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.7102 Effective date. The effective date of EPA approval...

  14. 40 CFR 62.7102 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Nevada Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.7102 Effective date. The effective date of EPA approval...

  15. 40 CFR 62.602 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Arizona Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.602 Effective date. The effective date of EPA approval of...

  16. 40 CFR 62.602 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Arizona Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.602 Effective date. The effective date of EPA approval of...

  17. 40 CFR 62.7102 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Nevada Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.7102 Effective date. The effective date of EPA approval...

  18. 40 CFR 62.602 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Arizona Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.602 Effective date. The effective date of EPA approval of...

  19. 40 CFR 62.602 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Arizona Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.602 Effective date. The effective date of EPA approval of...

  20. 40 CFR 62.7102 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Nevada Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.7102 Effective date. The effective date of EPA approval...

  1. 40 CFR 62.602 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Arizona Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.602 Effective date. The effective date of EPA approval of...

  2. 40 CFR 62.7102 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Nevada Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.7102 Effective date. The effective date of EPA approval...

  3. 40 CFR 62.632 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .../medical/infectious Waste Incinerators § 62.632 Effective date. The effective date of EPA approval of the plan is August 21, 2000. Emissions From Small Existing Municipal Waste Combustion Units...

  4. 40 CFR 62.6612 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .../medical/infectious Waste Incinerators § 62.6612 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000....

  5. 40 CFR 62.10911 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Hospital/medical/infectious Wastes Incinerators § 62.10911 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is November...

  6. 40 CFR 62.632 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .../medical/infectious Waste Incinerators § 62.632 Effective date. The effective date of EPA approval of the plan is August 21, 2000. Emissions From Small Existing Municipal Waste Combustion Units...

  7. 40 CFR 62.632 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .../medical/infectious Waste Incinerators § 62.632 Effective date. The effective date of EPA approval of the plan is August 21, 2000. Emissions From Small Existing Municipal Waste Combustion Units...

  8. 40 CFR 62.6612 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .../medical/infectious Waste Incinerators § 62.6612 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000....

  9. 40 CFR 62.632 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    .../medical/infectious Waste Incinerators § 62.632 Effective date. The effective date of EPA approval of the plan is August 21, 2000. Emissions From Small Existing Municipal Waste Combustion Units...

  10. 40 CFR 62.10911 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Hospital/medical/infectious Wastes Incinerators § 62.10911 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is November...

  11. 40 CFR 62.6612 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .../medical/infectious Waste Incinerators § 62.6612 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000....

  12. 40 CFR 62.632 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .../medical/infectious Waste Incinerators § 62.632 Effective date. The effective date of EPA approval of the plan is August 21, 2000. Emissions From Small Existing Municipal Waste Combustion Units...

  13. 40 CFR 62.6612 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .../medical/infectious Waste Incinerators § 62.6612 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000....

  14. 40 CFR 62.6612 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    .../medical/infectious Waste Incinerators § 62.6612 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000....

  15. Deformation of second and third quantization

    NASA Astrophysics Data System (ADS)

    Faizal, Mir

    2015-03-01

    In this paper, we will deform the second and third quantized theories by deforming the canonical commutation relations in such a way that they become consistent with the generalized uncertainty principle. Thus, we will first deform the second quantized commutator and obtain a deformed version of the Wheeler-DeWitt equation. Then we will further deform the third quantized theory by deforming the third quantized canonical commutation relation. This way we will obtain a deformed version of the third quantized theory for the multiverse.

  16. 40 CFR 1506.12 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 32 2010-07-01 2010-07-01 false Effective date. 1506.12 Section 1506... Effective date. The effective date of these regulations is July 30, 1979, except that for agencies that... extent practicable to ongoing activities and environmental documents begun before the effective...

  17. 18 CFR 1308.7 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Effective date. 1308.7... General Matters § 1308.7 Effective date. Subject to § 1308.3(a), this part applies to any TVA contract having an effective date on or after March 1, 1979....

  18. 34 CFR 105.42 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 34 Education 1 2010-07-01 2010-07-01 false Effective date. 105.42 Section 105.42 Education Regulations of the Offices of the Department of Education OFFICE FOR CIVIL RIGHTS, DEPARTMENT OF EDUCATION... DEPARTMENT OF EDUCATION § 105.42 Effective date. The effective date of this part is October 9, 1990....

  19. 33 CFR 106.110 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Compliance dates. 106.110 Section... MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES General § 106.110 Compliance dates. (a) On or... TWIC under this part may enroll beginning after the date set by the Coast Guard in a Notice to...

  20. 49 CFR 214.305 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Compliance dates. 214.305 Section 214.305..., DEPARTMENT OF TRANSPORTATION RAILROAD WORKPLACE SAFETY Roadway Worker Protection § 214.305 Compliance dates. Each program adopted by a railroad shall comply not later than the date specified in the...

  1. 40 CFR 57.106 - Expiration date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false Expiration date. 57.106 Section 57.106 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) PRIMARY NONFERROUS SMELTER ORDERS General § 57.106 Expiration date. Each NSO shall state its expiration date. No...

  2. 38 CFR 8a.3 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Effective date. 8a.3... INSURANCE § 8a.3 Effective date. (a) Where the grant was approved prior to August 11, 1971, VMLI shall be effective August 11, 1971, if on that date, the eligible veteran was obligated under a mortgage loan,...

  3. 31 CFR 575.212 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective dates. 575.212 Section 575.212 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF... Effective dates. The effective dates of the prohibitions and directives contained in this subpart B are...

  4. 49 CFR 1150.13 - Relevant dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 8 2010-10-01 2010-10-01 false Relevant dates. 1150.13 Section 1150.13 Transportation Other Regulations Relating to Transportation (Continued) SURFACE TRANSPORTATION BOARD, DEPARTMENT... Designated Operators § 1150.13 Relevant dates. The exact dates of the period of operation which have...

  5. 33 CFR 105.115 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Compliance dates. 105.115 Section... MARITIME SECURITY: FACILITIES General § 105.115 Compliance dates. (a) On or before December 31, 2003... required to obtain a TWIC under this part may enroll beginning after the date set by the Coast Guard in...

  6. 36 CFR 1258.16 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Effective date. 1258.16... AVAILABILITY AND USE FEES § 1258.16 Effective date. The fees in this part are effective on October 1, 2007. If your order was received by NARA before this effective date, we will charge the fees in effect at...

  7. 7 CFR 1000.90 - Dates.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Dates. 1000.90 Section 1000.90 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and... Miscellaneous Provisions § 1000.90 Dates. If a date required for a payment contained in a Federal milk...

  8. 29 CFR 452.137 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 2 2010-07-01 2010-07-01 false Effective dates. 452.137 Section 452.137 Labor Regulations Relating to Labor OFFICE OF LABOR-MANAGEMENT STANDARDS, DEPARTMENT OF LABOR LABOR-MANAGEMENT STANDARDS... OF 1959 Dates and Scope of Application § 452.137 Effective dates. (a) Section 404 states when...

  9. 31 CFR 540.302 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Effective date. 540.302 Section 540.302 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF... REGULATIONS General Definitions § 540.302 Effective date. The term effective date refers to the effective...

  10. 46 CFR 272.44 - Dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 8 2010-10-01 2010-10-01 false Dates. 272.44 Section 272.44 Shipping MARITIME ADMINISTRATION, DEPARTMENT OF TRANSPORTATION REGULATIONS AFFECTING SUBSIDIZED VESSELS AND OPERATORS REQUIREMENTS... Examination, Audit, Review and Appeal Procedures § 272.44 Dates. The dates noted on the letters...

  11. 42 CFR 423.40 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Effective dates. 423.40 Section 423.40 Public... Effective dates. (a) Initial enrollment period. (1) An enrollment made prior to the month of entitlement to... period specified in § 423.38(c), the effective date is determined by CMS, which, to the...

  12. 40 CFR 75.4 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... designated under the Acid Rain permit which governs that unit and contains the approved substitution or... become applicable upon the issuance date of the Acid Rain permit. For combustion sources seeking to enter... following dates: (i) January 1, 1995; or (ii) 90 days after the issuance date of the Acid Rain permit...

  13. 49 CFR 571.8 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 6 2010-10-01 2010-10-01 false Effective date. 571.8 Section 571.8 Transportation..., DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR VEHICLE SAFETY STANDARDS General § 571.8 Effective date. (a) Firefighting vehicles. Notwithstanding the effective date provisions of the motor vehicle safety standards...

  14. 40 CFR 51.1004 - Attainment dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 2 2014-07-01 2014-07-01 false Attainment dates. 51.1004 Section 51....5 National Ambient Air Quality Standards § 51.1004 Attainment dates. (a) Consistent with section 172(a)(2)(A) of the Act, the attainment date for an area designated nonattainment for the PM2.5...

  15. 7 CFR 987.13 - Free dates.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Free dates. 987.13 Section 987.13 Agriculture... RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.13 Free dates. Free dates means... to acquire them at prices reasonably comparable with prices received domestically) and which are...

  16. 7 CFR 987.13 - Free dates.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Free dates. 987.13 Section 987.13 Agriculture... RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.13 Free dates. Free dates means... to acquire them at prices reasonably comparable with prices received domestically) and which are...

  17. 7 CFR 987.13 - Free dates.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Free dates. 987.13 Section 987.13 Agriculture... RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.13 Free dates. Free dates means... to acquire them at prices reasonably comparable with prices received domestically) and which are...

  18. 7 CFR 987.13 - Free dates.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Free dates. 987.13 Section 987.13 Agriculture... RIVERSIDE COUNTY, CALIFORNIA Order Regulating Handling Definitions § 987.13 Free dates. Free dates means... to acquire them at prices reasonably comparable with prices received domestically) and which are...

  19. 40 CFR 63.863 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 10 2010-07-01 2010-07-01 false Compliance dates. 63.863 Section 63..., Sulfite, and Stand-Alone Semichemical Pulp Mills § 63.863 Compliance dates. (a) The owner or operator of... startup date after March 13, 2001 must comply with the requirements in this subpart immediately...

  20. 40 CFR 63.826 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 10 2010-07-01 2010-07-01 false Compliance dates. 63.826 Section 63... Emission Standards for the Printing and Publishing Industry § 63.826 Compliance dates. (a) The compliance date for an owner or operator of an existing affected source subject to the provisions of this...

  1. 29 CFR 4007.11 - Due dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Due dates. (a) In general. For flat-rate and variable-rate premiums, the premium filing due date for... variable-rate premium payment must be made by the last day of the sixteenth full calendar month following... payment year. (ii) The due date for the variable-rate premium required by § 4006.3(b) of this chapter...

  2. Constitutive Law and Flow Mechanism in Diamond Deformation

    DOE PAGES

    Yu, Xiaohui; Raterron, Paul; Zhang, Jianzhong; ...

    2012-11-19

    Constitutive laws and crystal plasticity in diamond deformation have been the subjects of substantial interest since synthetic diamond was made in 1950's. To date, however, little is known quantitatively regarding its brittle-ductile properties and yield strength at high temperatures. In this paper, we report, for the first time, the strain-stress constitutive relations and experimental demonstration of deformation mechanisms under confined high pressure. The deformation at room temperature is essentially brittle, cataclastic, and mostly accommodated by fracturing on {111} plane with no plastic yielding at uniaxial strains up to 15%. At elevated temperatures of 1000°C and 1200°C diamond crystals exhibit significantmore » ductile flow with corresponding yield strength of 7.9 and 6.3 GPa, indicating that diamond starts to weaken when temperature is over 1000°C. Finally, at high temperature the plastic deformation and ductile flow is meditated by the <110>{111} dislocation glide and a very active {111} micro-twinning.« less

  3. Constitutive Law and Flow Mechanism in Diamond Deformation

    SciTech Connect

    Yu, Xiaohui; Raterron, Paul; Zhang, Jianzhong; Lin, Zhijun; Wang, Liping; Zhao, Yusheng

    2012-11-19

    Constitutive laws and crystal plasticity in diamond deformation have been the subjects of substantial interest since synthetic diamond was made in 1950's. To date, however, little is known quantitatively regarding its brittle-ductile properties and yield strength at high temperatures. In this paper, we report, for the first time, the strain-stress constitutive relations and experimental demonstration of deformation mechanisms under confined high pressure. The deformation at room temperature is essentially brittle, cataclastic, and mostly accommodated by fracturing on {111} plane with no plastic yielding at uniaxial strains up to 15%. At elevated temperatures of 1000°C and 1200°C diamond crystals exhibit significant ductile flow with corresponding yield strength of 7.9 and 6.3 GPa, indicating that diamond starts to weaken when temperature is over 1000°C. Finally, at high temperature the plastic deformation and ductile flow is meditated by the <110>{111} dislocation glide and a very active {111} micro-twinning.

  4. Transverse deformations of extreme horizons

    NASA Astrophysics Data System (ADS)

    Li, Carmen; Lucietti, James

    2016-04-01

    We consider the inverse problem of determining all extreme black hole solutions to the Einstein equations with a prescribed near-horizon geometry. We investigate this problem by considering infinitesimal deformations of the near-horizon geometry along transverse null geodesics. We show that, up to a gauge transformation, the linearised Einstein equations reduce to an elliptic PDE for the extrinsic curvature of a cross-section of the horizon. We deduce that for a given near-horizon geometry there exists a finite dimensional moduli space of infinitesimal transverse deformations. We then establish a uniqueness theorem for transverse deformations of the extreme Kerr horizon. In particular, we prove that the only smooth axisymmetric transverse deformation of the near-horizon geometry of extreme Kerr, such that cross-sections of the horizon are marginally trapped surfaces, corresponds to that of the extreme Kerr black hole. Furthermore, we determine all smooth and biaxisymmetric transverse deformations of the near-horizon geometry of the five-dimensional extreme Myers-Perry black hole with equal angular momenta. We find a three parameter family of solutions such that cross-sections of the horizon are marginally trapped, which is more general than the known black hole solutions. We discuss the possibility that they correspond to new five-dimensional vacuum black holes.

  5. Geophysical Insights from Archaeomagnetic Dating

    NASA Astrophysics Data System (ADS)

    Holme, R.; Lodge, A.; Suttie, N.; Shaw, J.; Hill, M. J.; Linford, P.

    2009-12-01

    We report on work which has been undertaken towards developing an improved methodology for archaeomagnetic dating of archaeological samples through the use of a dedicated field model. In this talk, we focus on the more general (non-archaeological) implications of our results. Our work has focused on Europe, taking advantage of the better spatial and temporal coverage of available samples. Nevertheless, we model the field globally, using an a priori model (such as, for example, CALS7K) to constrain the field away from the regions of available data. This is advantageous over the use of a local field modelling methodology, as it allows us to examine the physical consequences of structure in our model (for example, in terms of the spectra of the field and secular variation at the core-mantle boundary), and to control possible edge effects in the model, which in a local model might produce an unphysical solution. By focusing on one particular region, we produce models that may not be optimal in terms of global structure, but allow us to investigate the data content in the region where it may provide the most information on core-field evolution. In parallel, we have been expanding the archaeointensity record for Great Britain, towards producing an archaeointensity curve for the UK which could ultimately be used for dating of unoriented samples (such as pot sherds). This new record, combined with other recently acquired high-quality intensity data, allows us to consider the evolution of global geomagnetic field strength in parallel with a good model of directional measurements; from 1590, the GUFM model is appropriate. Recent attempts to determine global intensity variation have used all available data (some of uncertain quality) to quantify variations in field strength. By instead focusing on a more limited dataset of known quality, we are able to examine intensity trends in greater detail. We present evidence that the intensity of the field was higher prior to 1840 than

  6. Two 1999 Dates Worth Noting

    NASA Technical Reports Server (NTRS)

    Stern, David P.

    1999-01-01

    Two dates in 1999 can serve as pivots for space-related educational outreach. On August 11 a total solar eclipse will sweep across Europe and also across the Near East, where it will come remarkably close to matching the ancient eclipse (probably in 129 BC) used by Hipparchus to estimate the distance of the Moon. Using published eclipse data, students may conduct a similar calculation for 1999 and in the process obtain insights about astronomy, history and the way scientists work. October 19, 1999 will be the 100th anniversary of the day when a teen-age Robert Goddard climbed a cherry tree near the Worcester home where his family was staying, intending to prune it. Sitting in that tree, Goddard began daydreaming about space flight, and by the time he came down he had resolved to dedicate his life to implementing that dream. He later marked that day as "Anniversary day," a personal holiday. Material on both subjects can be reached from http://www-spof.gsfc.nasa.gov/stargaze/Sintro.htm, sections 8a and 26. The section on Goddard includes his experiments with a ballistic pendulum and the DeLaval nozzle, which laid the essential scientific foundation of spaceflight and which is also suitable for classroom presentation.

  7. Chaetal deformities in aquatic oligochaeta

    SciTech Connect

    Brinkhurst, R.O.; Wetzel, M.J.

    1994-12-31

    Gross deformities in the chaetae of specimens of the tubificid Potamothrix hammoniensis were described by Milbrink from Lake Vaenern, Sweden. This lake is one of the most mercury-polluted major lakes of the world. Statistical tests showed a highly significant correlation between the incidence of deformities and the mercury concentration in the sediments. Changes in the pulp and paper mill process led to marked reduction in specimens with deformities. Similarly modified specimens of various species have been observed at a number of sites contaminated with heavy metals or oil residues in North America. Experimental work on chaetal form has demonstrated changes due to conductivity which have also been observed in saline inland waters. These experiments suggest that chaetae may be shed and replaced by worms every few days. EDX observation of chaetae indicated that metals may accumulate in them, and so provide a potential depuration mechanism. Independent physiological studies suggest that worms may be capable of regulating their metal levels.

  8. Finite Deformation of Magnetoelastic Film

    SciTech Connect

    Barham, Matthew Ian

    2011-05-31

    A nonlinear two-dimensional theory is developed for thin magnetoelastic lms capable of large deformations. This is derived directly from three-dimensional theory. Signi cant simpli cations emerge in the descent from three dimensions to two, permitting the self eld generated by the body to be computed a posteriori. The model is specialized to isotropic elastomers with two material models. First weak magnetization is investigated leading to a free energy where magnetization and deformation are un-coupled. The second closely couples the magnetization and deformation. Numerical solutions are obtained to equilibrium boundary-value problems in which the membrane is subjected to lateral pressure and an applied magnetic eld. An instability is inferred and investigated for the weak magnetization material model.

  9. Deformed Richardson-Gaudin model

    NASA Astrophysics Data System (ADS)

    Kulish, P.; Stolin, A.; Johannesson, L. H.

    2014-09-01

    The Richardson-Gaudin model describes strong pairing correlations of fermions confined to a finite chain. The integrability of the Hamiltonian allows the algebraic construction of its eigenstates. In this work we show that the quantum group theory provides a possibility to deform the Hamiltonian preserving integrability. More precisely, we use the so-called Jordanian r-matrix to deform the Hamiltonian of the Richardson-Gaudin model. In order to preserve its integrability, we need to insert a special nilpotent term into the auxiliary L-operator which generates integrals of motion of the system. Moreover, the quantum inverse scattering method enables us to construct the exact eigenstates of the deformed Hamiltonian. These states have a highly complex entanglement structure which require further investigation.

  10. Deformation of Unentangled Swollen Gels

    NASA Astrophysics Data System (ADS)

    Sariyer, Ozan; Panyukov, Sergey; Rubinstein, Michael

    2014-03-01

    We study the deformation characteristics (Poisson's ratios and stress-strain relations) of unentangled gels swollen and uniaxially or biaxially deformed in excess solvent by considering the balance of osmotic pressure and elastic stress in unconstrained dimensions. Our scaling theory predicts a crossover from theta solvent behavior to marginal solvent behavior upon stretching gels that are in concentrated regime at swelling equilibrium - a phenomenon that was experimentally observed long ago, but not understood theoretically. For gels that are in the semidilute good solvent regime at swelling equilibrium, we predict a crossover to theta solvent behavior upon compression and a crossover to marginal solvent behavior upon stretching. Our theory reproduces the previously known results for equilibrium swelling degree as well as known deformation characteristics in theta and athermal solvents.

  11. Shock metamorphism of deformed quartz

    NASA Technical Reports Server (NTRS)

    Gratz, Andrew J.; Christie, John; Tyburczy, James; Ahrens, Thomas; Pongratz, Peter

    1988-01-01

    The effect produced by shock loading (to peak pressures of 12 and 24) on deformed synthetic quartz containing a dislocation and abundant bubbles and small inclusions was investigated, and the relationships between preexisting dislocation density shock lamellae in the target material were examined. The resultant material was found to be inhomogeneously deformed and extremely fractured. Results of TEM examinations indicate that no change in dislocation density was caused by shock loading except in regions containing shock lamellae, where the dislocation density was lowered. The shock-induced defects tend to nucleate on and be controlled by preexisting stress concentrators; shock lamellae, glassy veins, and most curviplanar defects form in tension, presumably during release. An extremely mobile silica fluid is formed and injected into fractures during release, which forcibly removes crystalline fragments from vein walls. It is concluded that shock deformation in quartz is dominated by fracture and melting.

  12. Deformation processes in forging ceramics

    NASA Technical Reports Server (NTRS)

    Cannon, R. M.; Rhodes, W. H.

    1973-01-01

    The deformation processes involved in the forging of refractory ceramic oxides were investigated. A combination of mechanical testing and forging was utilized to investigate both the flow and fracture processes involved. Deformation studies of very fine grain Al203 revealed an apparent transition in behavior, characterized by a shift in the strain rate sensitivity from 0.5 at low stresses to near unity at higher stresses. The behavior is indicative of a shift in control between two dependent mechanisms, one of which is indicated to be cation limited diffusional creep with significant boundary enhancement. The possible contributions of slip, indicated by crystallographic texture, interface control of the diffusional creep and inhomogeneous boundary sliding are also discussed. Additional experiments indicated an independence of deformation behavior on MgO doping and retained hot pressing impurities, at least for ultrafine grained material, and also an independence of test atmosphere.

  13. Microstructure of deformed graywacke sandstones

    SciTech Connect

    Dengler, L.A.

    1980-03-05

    Microsctures in low-permeability graywacke sandstones were studied by optical and scanning electron microscopy (SEM). SEM specimens were prepared by ion-bombardment of thick polished samples. The undeformed rock contains grains in a matrix composed primarily of authigenic chlorite and kaolinite. Chlorite platelets are randomly arranged in face-to-edge relation to one another. Kaolinite occurs as pseudohexagonal crystals stacked face-to-face in pore filling books. Uniaxial-stress experiments covered a range of confining pressures from .1 to 600 MPa. Below 50 MPa confining pressure, intergranular fracturing occurs within the fault zone and near the sample's cylindrical surface. Between 100 and 300 MPa confining pressure, fault zones contain highly fractured grains, gauge and slickensides on grain surfaces. At 600 MPa, the sample contains a diffuse shear zone of highly fractured grains and no well-defined fault. In all samples, the distribution of microcracks is heterogeneous. Different clay minerals exhibit different modes of deformation. Chlorite structure responds to applied stress by compaction, reducing both pore size and volume. Chlorite platelets are plastically deformed in even the least strained samples. Kaolinite does not deform plastically in any of the samples examined. Deformation of kaolinite is restricted to toppling of the book structure. Dilatant crack growth was studied in two samples unloaded prior to failure. Uniaxially-strained samples deform primarily along grain boundaries, producing intergranular cracks and realignment of chlorite platelets. Intragranular crack density is linearly related to axial-strain, although grains are less fractured than in uniaxially-stressed samples tested at equivalent mean pressures. Cracks are rarely longer than a grain diameter. Nuclear-explosively deformed samples were recovered after the Rio Blanco gas stimulation experiment. (JGB)

  14. Conceptual Design of the Aluminum Reflector Antenna for DATE5

    NASA Astrophysics Data System (ADS)

    Qian, Yuan; Kan, Frank W.; Sarawit, Andrew T.; Lou, Zheng; Cheng, Jing-Quan; Wang, Hai-Ren; Zuo, Ying-Xi; Yang, Ji

    2016-08-01

    DATE5, a 5 m telescope for terahertz exploration, was proposed for acquiring observations at Dome A, Antarctica. In order to observe the terahertz spectrum, it is necessary to maintain high surface accuracy in the the antenna when it is exposed to Antarctic weather conditions. Structural analysis shows that both machined aluminum and carbon fiber reinforced plastic (CFRP) panels can meet surface accuracy requirements. In this paper, one design concept based on aluminum panels is introduced. This includes panel layout, details on panel support, design of a CFRP backup structure, and detailed finite element analysis. Modal, gravity and thermal analysis are all performed and surface deformations of the main reflector are evaluated for all load cases. At the end of the paper, the manufacture of a prototype panel is also described. Based on these results, we found that using smaller aluminum reflector panels has the potential to meet the surface requirements in the harsh Dome A environment.

  15. Controllable objective with deformable mirrors

    SciTech Connect

    Agafonov, V V; Safronov, A G

    2004-03-31

    A new optical device - an objective with deformable mirrors and parameters controlled in the dynamic regime is proposed. The computer simulation of the objective is performed. The dependences of some parameters of the objective on the control voltage are determined. The simulation showed that the ranges of control of the rear focal segment and the focal distance for the objective with the focal distance 602 mm were 1057 and 340 mm, respectively, which is substantially greater than in the control of an equivalent deformable mirror. (laser applications and other topics in quantum electronics)

  16. Analytical volcano deformation source models

    USGS Publications Warehouse

    Lisowski, Michael; Dzurisin, Daniel

    2007-01-01

    Primary volcanic landforms are created by the ascent and eruption of magma. The ascending magma displaces and interacts with surrounding rock and fluids as it creates new pathways, flows through cracks or conduits, vesiculates, and accumulates in underground reservoirs. The formation of new pathways and pressure changes within existing conduits and reservoirs stress and deform the surrounding rock. Eruption products load the crust. The pattern and rate of surface deformation around volcanoes reflect the tectonic and volcanic processes transmitted to the surface through the mechanical properties of the crust.

  17. Ilizarov principles of deformity correction.

    PubMed

    Spiegelberg, B; Parratt, T; Dheerendra, S K; Khan, W S; Jennings, R; Marsh, D R

    2010-03-01

    Ilizarov frames provide a versatile fixation system for the management of bony deformities, fractures and their complications. The frames give stability, soft tissue preservation, adjustability and functionality allowing bone to realise its full osteogenic potential. It is important that we have a clear and concise understanding of the Ilizarov principles of deformity correction to best make use of this fixation system. In this review article, the history of Ilizarov frame, the basic sciences behind it, the mechanical principles governing its use and the clinical use of the fixation system are discussed.

  18. Ilizarov principles of deformity correction

    PubMed Central

    Spiegelberg, B; Parratt, T; Dheerendra, SK; Khan, WS; Jennings, R; Marsh, DR

    2010-01-01

    Ilizarov frames provide a versatile fixation system for the management of bony deformities, fractures and their complications. The frames give stability, soft tissue preservation, adjustability and functionality allowing bone to realise its full osteogenic potential. It is important that we have a clear and concise understanding of the Ilizarov principles of deformity correction to best make use of this fixation system. In this review article, the history of Ilizarov frame, the basic sciences behind it, the mechanical principles governing its use and the clinical use of the fixation system are discussed. PMID:20353638

  19. Cavity coalescence in superplastic deformation

    SciTech Connect

    Stowell, M.J.; Livesey, D.W.; Ridley, N.

    1984-01-01

    An analysis of the probability distribution function of particles randomly dispersed in a solid has been applied to cavitation during superplastic deformation and a method of predicting cavity coalescence developed. Cavity size distribution data were obtained from two microduplex nickel-silver alloys deformed superplastically to various extents at elevated temperature, and compared to theoretical predictions. Excellent agreement occurred for small void sizes but the model underestimated the number of voids in the largest size groups. It is argued that the discrepancy results from a combination of effects due to non-random cavity distributions and to enhanced growth rates and incomplete spheroidization of the largest cavities.

  20. Mobility of iridium in terrestrial environments: Implications for the interpretation of impact-related mass-extinctions

    NASA Astrophysics Data System (ADS)

    Martín-Peinado, F. J.; Rodríguez-Tovar, F. J.

    2010-08-01

    Traditionally, iridium has been considered an element of low mobility, but its behavior is still debated. Ir concentration in a soil affected by a catastrophic mining spill in 1998 that covered the soil with a layer of tailings offers the opportunity to analyse an exceptional Ir-bearing horizon 10 years after deposition. This has enabled comparisons with the values of past Ir-bearing horizons associated to impact-related mass-extinction events. Iridium concentration in the tailings (0.349 ppm) was 5-fold higher than the anomaly in the K-Pg at The Moody Creek Mine section (the highest values obtained from terrestrial sections). The oxidative weathering of the tailings caused the release of Ir and infiltration into the soil. Iridium distribution in depth indicates redistribution throughout the profile in relation to the change in the physico-chemical properties of the soil. With regard to the background concentration in the soil (0.056 ppm), anomalous values of Ir (0.129 ppm) can be detected to 11 cm below the layer of tailings. The correlation analysis between the Ir concentration and the main properties and constituents of the soils indicated a significant correlation with sulfur, iron, clay content, and pH. Selective extractions were made to study the forms in which Ir can be mobilized in the soil. The residual/insoluble fraction was >90% of the total Ir concentration in soil. Soluble-in-water concentration of Ir (1.5% of total) was detected in the uppermost 2-3 cm of the soil, which were directly affected by the leaching of acidic waters coming from the oxidation of the pyrite tailings. Iridium retention in the affected part of the soil reached 9% of the total Ir concentration; this retention could be related to the amorphous iron forms dissolved by the oxalic-oxalate extraction. However, according to our research, original Ir abundance could be secondarily modified, and then a direct analysis of the iridium values recorded in sediments could induce

  1. Quality of Life Impact Related to Foot Health in a Sample of Older People with Hallux Valgus

    PubMed Central

    López, Daniel López; Callejo González, Lucía; Iglesias, Marta Elena Losa; Canosa, Jesús Luis Saleta; Sanz, David Rodríguez; Lobo, Cesar Calvo; de Bengoa Vallejo, Ricardo Becerro

    2016-01-01

    Hallux Valgus (HV) is a highly prevalent forefoot deformity in older people associated with progressive subluxation and osteoarthritis of the first metatarsophalangeal (MTP) joint and it is believed to be associated with varying degrees of HV effect on the quality of life related to foot health. The aim of this study is to compare the impact of varying degrees of HV on foot health in a sample of older people. The sample consisted of 115 participants, mean age 76.7 ± 9.1, who attended an outpatient center where self-report data were recorded. The degree of HV deformity was determined in both feet using the Manchester Scale (MS) from stage 1 (mild) to 4 (very severe). Scores obtained on the Foot Health Status Questionnaire (FHSQ) were compared. This has 13 questions that assess 4 health domains of the feet, namely pain, function, general health and footwear. The stage 4 of HV shown lower scores for the footwear domain (11.23 ± 15.6); general foot health (27.62 ± 19.1); foot pain (44.65 ± 24.5); foot function (53.04 ± 27.2); vigour (42.19 ± 16.8); social capacity (44.46 ± 28.1); and general health (41.15 ± 25.5) compared with stage 1 of HV (P<0.05) and there were no differences of physical activity (62.81 ± 24.6). Often, quality of life decreases in the elderly population based in large part on their foot health. There is a progressive reduction in health in general and foot health with increasing severity of hallux valgus deformity which appears to be associated with the presence of greater degree of HV, regardless of gender. PMID:26816663

  2. Dating of polyhalite and langbeinite: preliminary results from German Zechstein

    NASA Astrophysics Data System (ADS)

    Neubauer, Franz; Schorn, Anja; Leitner, Christoph; Genser, Johann

    2013-04-01

    Evaporite mélanges often form decollément surfaces of major extensional and contractional allochthons because of the very low shear resistance of halite. Due to the deposition of evaporites during an early stage of passive continental margin formation, evaporites are commonly overlain by thick successions of carbonates and/or siliciclastic rocks deposited during the main thermal subsidence stage of the passive margin formation. The most common cases of evaporite mélanges are such (1) at passive continental margins, where they are deformed during gravity-driven extension, commonly raft tectonics, in an extensional geodynamic setting, (2) in external foreland fold-thrust belts within a convergent geodynamic setting, and (3) in salt diapirs. In all these cases, halite is strongly deformed by late-stage deformation and only sulphate lenses composed of anhydrite and gypsum preserve early deformational stages. Dating of K-sulphates may allow the recognition of early stages of deformation although this method is poorly applied (Renne et al., 2001). Knowledge of the limitations of K-sulphate chronometers of langbeinite and polyhalite may allow, therefore, dating of full history of evaporite mélanges (for polyhalite, see Leitner et al., 2012). Polyhalite has the chemical formula [K2Ca2Mg(SO4)4?2 H2O] and commonly occurs in sedimentary evaporite successions. The mineral can be synthesised under laboratory conditions by a reaction of gypsum with appropriate solutions in the ternary system K2SO4-MgSO4-H2O at temperatures above 70 ° C (Freyer and Voigt, 2003). At lower temperatures, polyhalite crystallisation slows down (Wollmann, 2010). In nature, polyhalite, which is stable between ~ room temperature (0-25 ° C) and 255-343 ° C (Wollmann et al., 2008) or 285 ° C (Fischer et al., 1996), most commonly forms early-diagenetically or secondarily (Warren, 2006 and Leitner et al., 2012 and references therein). The secondary mineral langbeinite [K2Mg2(SO4)3],whose lower

  3. Low temperature deformation detwinning - a reverse mode of twinning.

    SciTech Connect

    Wang, Y. D.; Liu, W.; Lu, L.; Ren, Y.; Nie, Z. H.; Almer, J.; Cheng, S.; Shen, Y. F.; Zuo, L.; Liaw, P. K.; Lu, K.

    2010-01-01

    The origin of the plasticity in bulk nanocrystalline metals have, to date, been attributed to the grain-boundary-mediated process, stress-induced grain coalescence, dislocation plasticity, and/or twinning. Here we report a different mechanism - detwinning, which operates at low temperatures during the tensile deformation of an electrodeposited Cu with a high density of nanosized growth twins. Both three-dimensional XRD microscopy using the Laue method with a submicron-sized polychromatic beam and high-energy XRD technique with a monochromatic beam provide the direct experimental evidences for low temperature detwinning of nanoscale twins.

  4. Correlates of cyber dating abuse among teens.

    PubMed

    Zweig, Janine M; Lachman, Pamela; Yahner, Jennifer; Dank, Meredith

    2014-08-01

    Recent advancements in technology (e.g., social networking, texting) have created new ways for dating youth to relate to one another, including in abusive ways via "cyber dating abuse." Cyber dating abuse is a form of teen dating violence that overlaps with other types of abuse (e.g., psychological) but also has several unique characteristics. Given the phenomenon's limited presence in dating violence literature, we focus on identifying how experiencing cyber dating abuse relates to youths' individual behaviors and experiences (e.g., substance use, sexual activity), psychosocial adjustment, school connection, family relationships, and partner relationships. A total of 3,745 youth (52% female, 74% White) in three northeastern states participated in the survey and reported currently being in a dating relationship or having been in one during the prior year. We found that experiences of cyber dating abuse were most significantly correlated with being female, committing a greater variety of delinquent behaviors, having had sexual activity in one's lifetime, having higher levels of depressive symptoms, and having higher levels of anger/hostility. Further, cyber dating abuse appeared somewhat more strongly related to depressive symptoms and delinquency than did other forms of teen dating violence and abuse.

  5. Dating for Older Women: Experiences and Meanings of Dating in Later Life

    PubMed Central

    Watson, Wendy K.; Stelle, Charlie

    2013-01-01

    Research over the last 20 years has provided an increased understanding of intimate relationships in later life; however, dating in later life remains largely unexplored. The purpose of this study was to examine the meanings of dating for women in later life. In this study, dating was examined through semistructured, in-depth interviews with 14 women ages 64 to 77 who had all dated in later life. Themes that emerged from an interpretative phenomenological analysis included multiple meanings of dating in later life, how dating in later life compared to earlier points in life, and dating in the future. PMID:21767089

  6. Highly deformable nanofilaments in flow

    NASA Astrophysics Data System (ADS)

    Pawłowska, S.

    2016-10-01

    Experimental analysis of hydrogel nanofilaments conveyed by flow is conducted to help in understanding physical phenomena responsible for transport properties and shape deformations of long bio-objects, like DNA or proteins. Investigated hydrogel nanofilaments exhibit typical macromolecules-like behavior, as spontaneous conformational changes and cross-flow migration. Results of the experiments indicate critical role of thermal fluctuations behavior of single filaments.

  7. Suggested terminology for Quaternary dating methods

    USGS Publications Warehouse

    Colman, Steven M.; Pierce, K.L.; Birkeland, P.W.

    1987-01-01

    Classification of Quaternary dating methods should be based on the level of quantitative information and the degree of confidence contained in the age estimates produced by the dating methods. We recommend the use of the terms numerical-age, calibrated-age, relative-age, and correlated-age to describe these levels. We also classify dating methods by type into sideral, isotopic, radiogenic, chemical and biological, geomorphic, and correlation methods. The use of "absolute" is inappropriate for most dating methods, and should be replaced by "numerical." The use of "date" should be minimized in favor of "age" or "age estimate." We recommend use of the abbreviations ka and Ma for most ages; calender dates can be used where appropriate and yr B.P. can be used for radiocarbon ages. ?? 1987.

  8. 40 CFR 156.159 - Compliance date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Compliance date. 156.159 Section 156... REQUIREMENTS FOR PESTICIDES AND DEVICES Container Labeling § 156.159 Compliance date. Any pesticide product...(d)(7), 156.10(f), 156.10(i)(2)(ix), 156.140, 156.144, 156.146, and 156.156. Effective Date Note:...

  9. Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

    DOE PAGES

    Kaercher, Pamela M.; Zepeda-Alarcon, Eloisa; Prakapenka, Vitali B.; ...

    2014-11-07

    Although the crystal structure of the high pressure SiO2 polymorph stishovite has been studied in detail, little is known about the development of crystallographic preferred orientation (CPO) during deformation in stishovite. Insight into CPO and associated deformation mechanics of stishovite would provide important information for understanding subduction of quartz-bearing crustal rocks into the mantle. To study CPO development, we converted a natural sample of flint to stishovite in a laser heated diamond anvil cell and compressed the stishovite aggregate up to 38 GPa. We collected diffraction patterns in radial geometry to examine in situ development of crystallographic preferred orientation andmore » find that (001) poles preferentially align with the compression direction. Viscoplastic self-consistent modeling suggests the most likely slip systems at high pressure and ambient temperature are pyramidal and basal slip.« less

  10. Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

    NASA Astrophysics Data System (ADS)

    Kaercher, Pamela M.; Zepeda-Alarcon, Eloisa; Prakapenka, Vitali B.; Kanitpanyacharoen, Waruntorn; Smith, Jesse S.; Sinogeikin, Stanislav; Wenk, Hans-Rudolf

    2015-04-01

    Although the crystal structure of the high-pressure SiO2 polymorph stishovite has been studied in detail, little is known about the development of crystallographic preferred orientation (CPO) during deformation in stishovite. Insight into CPO and associated deformation mechanics of stishovite would provide important information for understanding subduction of quartz-bearing crustal rocks into the mantle. To study CPO development, we converted a natural sample of flint to stishovite in a laser-heated diamond anvil cell and compressed the stishovite aggregate up to 38 GPa. We collected diffraction patterns in radial geometry to examine in situ development of crystallographic preferred orientation and find that (001) poles preferentially align with the compression direction. Viscoplastic self-consistent modeling suggests the most likely slip systems at high pressure and ambient temperature are pyramidal and basal slip.

  11. Highly deformable bones: unusual deformation mechanisms of seahorse armor.

    PubMed

    Porter, Michael M; Novitskaya, Ekaterina; Castro-Ceseña, Ana Bertha; Meyers, Marc A; McKittrick, Joanna

    2013-06-01

    Multifunctional materials and devices found in nature serve as inspiration for advanced synthetic materials, structures and robotics. Here, we elucidate the architecture and unusual deformation mechanisms of seahorse tails that provide prehension as well as protection against predators. The seahorse tail is composed of subdermal bony plates arranged in articulating ring-like segments that overlap for controlled ventral bending and twisting. The bony plates are highly deformable materials designed to slide past one another and buckle when compressed. This complex plate and segment motion, along with the unique hardness distribution and structural hierarchy of each plate, provide seahorses with joint flexibility while shielding them against impact and crushing. Mimicking seahorse armor may lead to novel bio-inspired technologies, such as flexible armor, fracture-resistant structures or prehensile robotics.

  12. Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

    SciTech Connect

    Kaercher, Pamela M.; Zepeda-Alarcon, Eloisa; Prakapenka, Vitali B.; Kanitpanyacharoen, Waruntorn; Smith, Jesse S.; Sinogeikin, Stanislav; Wenk, Hans-Rudolf

    2014-11-07

    Although the crystal structure of the high pressure SiO2 polymorph stishovite has been studied in detail, little is known about the development of crystallographic preferred orientation (CPO) during deformation in stishovite. Insight into CPO and associated deformation mechanics of stishovite would provide important information for understanding subduction of quartz-bearing crustal rocks into the mantle. To study CPO development, we converted a natural sample of flint to stishovite in a laser heated diamond anvil cell and compressed the stishovite aggregate up to 38 GPa. We collected diffraction patterns in radial geometry to examine in situ development of crystallographic preferred orientation and find that (001) poles preferentially align with the compression direction. Viscoplastic self-consistent modeling suggests the most likely slip systems at high pressure and ambient temperature are pyramidal and basal slip.

  13. Clusterization and quadrupole deformation in nuclei

    SciTech Connect

    Cseh, J.; Algora, A.; Antonenko, N. V.; Jolos, R. V.; Scheid, W.; Darai, J.; Hess, P. O.

    2006-04-26

    We study the interrelation of the clusterization and quadrupole deformation of atomic nuclei, by applying cluster models. Both the energetic stability and the exclusion principle is investigated. Special attention is paid to the relative orientations of deformed clusters.

  14. Evaluation of soft sediment deformation structures along the Fethiye-Burdur Fault Zone, SW Turkey

    NASA Astrophysics Data System (ADS)

    Ozcelik, Mehmet

    2016-03-01

    Burdur city is located on lacustrine sedimentary deposits at the northeastern end of the Fethiye-Burdur Fault Zone (FBFZ) in SW Turkey. Fault steps were formed in response to vertical displacement along normal fault zones in these deposits. Soft sediment deformation structures were identified at five sites in lacustrine sediments located on both sides of the FBFZ. The deformed sediments are composed of unconsolidated alternations of sands, silts and clay layers and show different morphological types. The soft sediment deformation structures include load structures, flame structures, slumps, dykes, neptunian dykes, drops and pseudonodules, intercalated layers, ball and pillow structures, minor faults and water escape structures of varying geometry and dimension. These structures are a direct response to fluid escape during liquefaction and fluidization mechanism. The driving forces inferred include gravitational instabilities and hydraulic processes. Geological, tectonic, mineralogical investigations and age analysis were carried out to identify the cause for these soft sediment deformations. OSL dating indicated an age ranging from 15161±744 to 17434±896 years for the soft sediment deformation structures. Geological investigations of the soft sediment deformation structures and tectonic history of the basin indicate that the main factor for deformation is past seismic activity.

  15. Deformed special relativity and deformed symmetries in a canonical framework

    SciTech Connect

    Ghosh, Subir; Pal, Probir

    2007-05-15

    In this paper we have studied the nature of kinematical and dynamical laws in {kappa}-Minkowski spacetime from a new perspective: the canonical phase space approach. We discuss a particular form of {kappa}-Minkowski phase space algebra that yields the {kappa}-extended finite Lorentz transformations derived in [D. Kimberly, J. Magueijo, and J. Medeiros, Phys. Rev. D 70, 084007 (2004).]. This is a particular form of a deformed special relativity model that admits a modified energy-momentum dispersion law as well as noncommutative {kappa}-Minkowski phase space. We show that this system can be completely mapped to a set of phase space variables that obey canonical (and not {kappa}-Minkowski) phase space algebra and special relativity Lorentz transformation (and not {kappa}-extended Lorentz transformation). The complete set of deformed symmetry generators are constructed that obeys an unmodified closed algebra but induce deformations in the symmetry transformations of the physical {kappa}-Minkowski phase space variables. Furthermore, we demonstrate the usefulness and simplicity of this approach through a number of phenomenological applications both in classical and quantum mechanics. We also construct a Lagrangian for the {kappa}-particle.

  16. Deformation of noncommutative quantum mechanics

    NASA Astrophysics Data System (ADS)

    Jiang, Jian-Jian; Chowdhury, S. Hasibul Hassan

    2016-09-01

    In this paper, the Lie group GNC α , β , γ , of which the kinematical symmetry group GNC of noncommutative quantum mechanics (NCQM) is a special case due to fixed nonzero α, β, and γ, is three-parameter deformation quantized using the method suggested by Ballesteros and Musso [J. Phys. A: Math. Theor. 46, 195203 (2013)]. A certain family of QUE algebras, corresponding to GNC α , β , γ with two of the deformation parameters approaching zero, is found to be in agreement with the existing results of the literature on quantum Heisenberg group. Finally, we dualize the underlying QUE algebra to obtain an expression for the underlying star-product between smooth functions on GNC α , β , γ .

  17. Variational approach and deformed derivatives

    NASA Astrophysics Data System (ADS)

    Weberszpil, J.; Helayël-Neto, J. A.

    2016-05-01

    Recently, we have demonstrated that there exists a possible relationship between q-deformed algebras in two different contexts of Statistical Mechanics, namely, the Tsallis' framework and the Kaniadakis' scenario, with a local form of fractional-derivative operators for fractal media, the so-called Hausdorff derivatives, mapped into a continuous medium with a fractal measure. Here, in this paper, we present an extension of the traditional calculus of variations for systems containing deformed-derivatives embedded into the Lagrangian and the Lagrangian densities for classical and field systems. The results extend the classical Euler-Lagrange equations and the Hamiltonian formalism. The resulting dynamical equations seem to be compatible with those found in the literature, specially with mass-dependent and with nonlinear equations for systems in classical and quantum mechanics. Examples are presented to illustrate applications of the formulation. Also, the conserved ​Noether current is worked out.

  18. Deformation processes in forging ceramics

    NASA Technical Reports Server (NTRS)

    Cannon, R. M.; Rhodes, W. H.

    1972-01-01

    The deformation processes involved in the forging of refractory ceramic oxides were investigated. A combination of mechanical testing and forging are utilized to investigate both the flow and fracture processes involved. An additional hemisphere forging was done which failed prematurely. Analysis and comparison with available fracture data for AL2O3 indicated possible causes of the failure. Examination of previous forgings indicated an increase in grain boundary cavitation with increasing strain.

  19. Jealousy during Dating among Female College Students

    ERIC Educational Resources Information Center

    Khanchandani, Laveena; Durham, Thomas W.

    2009-01-01

    This study examined the relationship between several situational and personality variables and jealousy in dating relationships among 100 college women volunteers who completed a series of questionnaires about themselves and their dating situations. Six research questions were examined. Results showed that jealousy was lower for women in a steady…

  20. Dating violence and suicidal behavior in adolescents.

    PubMed

    Holmes, Kristin; Sher, Leo

    2013-01-01

    The aim of this paper is to assess the possible consequences of adolescent physical, emotional and sexual dating violence through a review of the literature on the topic. An electronic search of major biomedical bibliographic databases (Pubmed, ISI, PsycINFO) was used to retrieve articles providing information on the prevalence rates, risk factors, associated consequences and possible preventive measures for adolescent dating violence across different populations. Currently, there have been few longitudinal studies conducted to identify potential risk factors for entering a violent dating relationship in adolescence. Risky behaviors such as early sexual intercourse may predispose someone for victimization. Dating violence itself is also a predictor of future dating violence. Adolescent dating violence was associated with an increase in other violence-related behaviors, substance use, depression, poorer educational outcomes, posttraumatic stress, unhealthy weight control and risky sexual behavior. The association between adolescent dating violence and an increase in suicidal behavior is a major public health concern. Future research should focus on longitudinal studies so that a causal relationship between dating violence and suicidality may be better understood.

  1. 45 CFR 1629.6 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 4 2011-10-01 2011-10-01 false Effective date. 1629.6 Section 1629.6 Public Welfare Regulations Relating to Public Welfare (Continued) LEGAL SERVICES CORPORATION BONDING OF RECIPIENTS § 1629.6 Effective date. (a) Each program shall certify in its Application for...

  2. 45 CFR 1629.6 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false Effective date. 1629.6 Section 1629.6 Public Welfare Regulations Relating to Public Welfare (Continued) LEGAL SERVICES CORPORATION BONDING OF RECIPIENTS § 1629.6 Effective date. (a) Each program shall certify in its Application for...

  3. Peer Involvement in Adolescent Dating Violence

    ERIC Educational Resources Information Center

    Stephenson, Pam S.; Martsolf, Donna; Draucker, Claire Burke

    2013-01-01

    This study investigated the ways in which peers are involved in adolescent dating violence. Eighty-eight young adults aged 18-21 were interviewed and asked to reflect on aggressive dating relationships they experienced as teens. The researchers used grounded theory to analyze the data. Findings showed that male and female peers were involved in…

  4. 31 CFR 357.1 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Effective date. 357.1 Section 357.1 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE... AND BILLS HELD IN LEGACY TREASURY DIRECT General Information § 357.1 Effective date. Subpart B of...

  5. 44 CFR 206.17 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Effective date. 206.17 Section 206.17 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY DISASTER ASSISTANCE FEDERAL DISASTER ASSISTANCE General § 206.17 Effective date....

  6. The Galileo arrival date selection process

    NASA Technical Reports Server (NTRS)

    Ludwinski, Jan M.; Gershman, Robert

    1988-01-01

    The Galileo arrival date selection process has culminated in the selection of December 7,1995. This arrival date will provide excellent science opportunities at Jupiter as well as the first spacecraft reconnaissance ever of not one, but two asteroids during the cruise to Jupiter.

  7. 18 CFR 807.4 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Effective date. 807.4 Section 807.4 Conservation of Power and Water Resources SUSQUEHANNA RIVER BASIN COMMISSION WATER WITHDRAWAL REGISTRATION § 807.4 Effective date. This part shall be effective on January 1, 2007....

  8. 40 CFR 63.1501 - Dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Dates. 63.1501 Section 63.1501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL... Hazardous Air Pollutants for Secondary Aluminum Production General § 63.1501 Dates. (a) The owner...

  9. 32 CFR 191.10 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Effective date. 191.10 Section 191.10 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS THE DOD CIVILIAN EQUAL EMPLOYMENT OPPORTUNITY (EEO) PROGRAM § 191.10 Effective date. This part...

  10. 40 CFR 63.1545 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Compliance dates. 63.1545 Section 63.1545 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED... for Hazardous Air Pollutants for Primary Lead Smelting § 63.1545 Compliance dates. (a) Each owner...

  11. 7 CFR 1485.24 - Applicability date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 10 2010-01-01 2010-01-01 false Applicability date. 1485.24 Section 1485.24 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT... FOREIGN MARKETS FOR AGRICULTURAL COMMODITIES Market Access Program § 1485.24 Applicability date....

  12. Strategies for Family Facilitation of Play Dates

    ERIC Educational Resources Information Center

    Chambers, Cynthia R.; Horn, Eva M.

    2010-01-01

    Play dates can serve several functions for young children, including children with social difficulties, such as developmental delays, behavioral disorders, autism spectrum disorders, and shyness. Play dates provide children with additional opportunities to be around peers and to practice skills associated with peer play interactions. Play dates…

  13. 31 CFR 226.7 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Effective date. 226.7 Section 226.7 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE... LOAN DEPOSITARIES § 226.7 Effective date. The provisions of this part become effective November 2, 1978....

  14. 31 CFR 10.93 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Effective date. 10.93 Section 10.93 Money and Finance: Treasury Office of the Secretary of the Treasury PRACTICE BEFORE THE INTERNAL REVENUE SERVICE General Provisions § 10.93 Effective date. Except as otherwise provided in each section...

  15. 18 CFR 808.19 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Effective date. 808.19 Section 808.19 Conservation of Power and Water Resources SUSQUEHANNA RIVER BASIN COMMISSION HEARINGS AND ENFORCEMENT ACTIONS Compliance and Enforcement § 808.19 Effective date. This part shall be effective...

  16. 49 CFR 325.3 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 5 2010-10-01 2010-10-01 false Effective date. 325.3 Section 325.3 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION... STANDARDS General Provisions § 325.3 Effective date. The rules in this part are effective on October...

  17. 40 CFR 211.202 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Effective date. 211.202 Section 211.202 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) NOISE ABATEMENT PROGRAMS PRODUCT NOISE LABELING Hearing Protective Devices § 211.202 Effective date. Manufacturers of...

  18. 16 CFR 1205.31 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 16 Commercial Practices 2 2011-01-01 2011-01-01 false Effective date. 1205.31 Section 1205.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR WALK-BEHIND POWER LAWN MOWERS Certification § 1205.31 Effective date. Any walk-behind...

  19. 16 CFR 1205.31 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 16 Commercial Practices 2 2012-01-01 2012-01-01 false Effective date. 1205.31 Section 1205.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR WALK-BEHIND POWER LAWN MOWERS Certification § 1205.31 Effective date. Any walk-behind...

  20. 16 CFR 1205.31 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Effective date. 1205.31 Section 1205.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR WALK-BEHIND POWER LAWN MOWERS Certification § 1205.31 Effective date. Any walk-behind...

  1. 16 CFR 1205.31 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 2 2014-01-01 2014-01-01 false Effective date. 1205.31 Section 1205.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR WALK-BEHIND POWER LAWN MOWERS Certification § 1205.31 Effective date. Any walk-behind...

  2. 16 CFR 1205.31 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 16 Commercial Practices 2 2013-01-01 2013-01-01 false Effective date. 1205.31 Section 1205.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR WALK-BEHIND POWER LAWN MOWERS Certification § 1205.31 Effective date. Any walk-behind...

  3. 39 CFR 601.101 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 39 Postal Service 1 2010-07-01 2010-07-01 false Effective date. 601.101 Section 601.101 Postal Service UNITED STATES POSTAL SERVICE PROCUREMENT SYSTEM FOR THE U.S. POSTAL SERVICE: INTELLECTUAL PROPERTY RIGHTS OTHER THAN PATENTS PURCHASING OF PROPERTY AND SERVICES § 601.101 Effective date. These...

  4. 39 CFR 601.101 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 39 Postal Service 1 2011-07-01 2011-07-01 false Effective date. 601.101 Section 601.101 Postal Service UNITED STATES POSTAL SERVICE PROCUREMENT SYSTEM FOR THE U.S. POSTAL SERVICE: INTELLECTUAL PROPERTY RIGHTS OTHER THAN PATENTS PURCHASING OF PROPERTY AND SERVICES § 601.101 Effective date. These...

  5. 16 CFR 1302.6 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Effective date. 1302.6 Section 1302.6 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS BAN OF EXTREMELY FLAMMABLE CONTACT ADHESIVES § 1302.6 Effective date. This rule becomes effective January 18, 1978....

  6. 16 CFR 1302.6 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 2 2014-01-01 2014-01-01 false Effective date. 1302.6 Section 1302.6 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS BAN OF EXTREMELY FLAMMABLE CONTACT ADHESIVES § 1302.6 Effective date. This rule becomes effective January 18, 1978....

  7. 16 CFR 1302.6 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 16 Commercial Practices 2 2012-01-01 2012-01-01 false Effective date. 1302.6 Section 1302.6 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS BAN OF EXTREMELY FLAMMABLE CONTACT ADHESIVES § 1302.6 Effective date. This rule becomes effective January 18, 1978....

  8. 16 CFR 1302.6 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 16 Commercial Practices 2 2011-01-01 2011-01-01 false Effective date. 1302.6 Section 1302.6 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS BAN OF EXTREMELY FLAMMABLE CONTACT ADHESIVES § 1302.6 Effective date. This rule becomes effective January 18, 1978....

  9. 16 CFR 1302.6 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 16 Commercial Practices 2 2013-01-01 2013-01-01 false Effective date. 1302.6 Section 1302.6 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS BAN OF EXTREMELY FLAMMABLE CONTACT ADHESIVES § 1302.6 Effective date. This rule becomes effective January 18, 1978....

  10. 7 CFR 1773.8 - Audit date.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 12 2012-01-01 2012-01-01 false Audit date. 1773.8 Section 1773.8 Agriculture... (CONTINUED) POLICY ON AUDITS OF RUS BORROWERS RUS Audit Requirements § 1773.8 Audit date. (a) The annual audit must be performed as of the end of the same calendar month each year unless prior approval...

  11. 7 CFR 1773.8 - Audit date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 12 2011-01-01 2011-01-01 false Audit date. 1773.8 Section 1773.8 Agriculture... (CONTINUED) POLICY ON AUDITS OF RUS BORROWERS RUS Audit Requirements § 1773.8 Audit date. (a) The annual audit must be performed as of the end of the same calendar month each year unless prior approval...

  12. 7 CFR 1773.8 - Audit date.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 12 2014-01-01 2013-01-01 true Audit date. 1773.8 Section 1773.8 Agriculture... (CONTINUED) POLICY ON AUDITS OF RUS BORROWERS RUS Audit Requirements § 1773.8 Audit date. (a) The annual audit must be performed as of the end of the same calendar month each year unless prior approval...

  13. 29 CFR 2570.52 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Effective date. 2570.52 Section 2570.52 Labor Regulations Relating to Labor (Continued) EMPLOYEE BENEFITS SECURITY ADMINISTRATION, DEPARTMENT OF LABOR ADMINISTRATION... Transaction Exemption Applications § 2570.52 Effective date. This regulation is effective with respect to...

  14. 29 CFR 1910.17 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 5 2010-07-01 2010-07-01 false Effective dates. 1910.17 Section 1910.17 Labor Regulations... Effective dates. (a)-(b) (c) Except whenever any employment or place of employment is, or becomes, subject... reference in this subpart shall also become effective under the Williams-Steiger Occupational Safety...

  15. 48 CFR 6301.6 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Effective date. 6301.6 Section 6301.6 Federal Acquisition Regulations System DEPARTMENT OF TRANSPORTATION BOARD OF CONTRACT APPEALS BOARD OF CONTRACT APPEALS 6301.6 Effective date. This chapter shall apply to all appeals...

  16. 42 CFR 435.914 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Effective date. 435.914 Section 435.914 Public... Eligibility § 435.914 Effective date. (a) The agency must make eligibility for Medicaid effective no later... eligiblity for Medicaid effective on the first day of a month if an individual was eligible at any...

  17. 22 CFR 191.6 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Effective date. 191.6 Section 191.6 Foreign Relations DEPARTMENT OF STATE HOSTAGE RELIEF HOSTAGE RELIEF ASSISTANCE General § 191.6 Effective date. This regulation is effective as of November 4, 1979. Reimbursement may be made for expenses approved under...

  18. 29 CFR 2570.88 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Effective date. 2570.88 Section 2570.88 Labor Regulations Relating to Labor (Continued) EMPLOYEE BENEFITS SECURITY ADMINISTRATION, DEPARTMENT OF LABOR ADMINISTRATION... ERISA Section 502(l) § 2570.88 Effective date. This section is effective June 20, 1990, and shall...

  19. 49 CFR 37.181 - Applicability dates.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 1 2014-10-01 2014-10-01 false Applicability dates. 37.181 Section 37.181 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.181 Applicability dates. This subpart applies to...

  20. 49 CFR 37.181 - Applicability dates.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 1 2012-10-01 2012-10-01 false Applicability dates. 37.181 Section 37.181 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.181 Applicability dates. This subpart applies to...

  1. 49 CFR 37.181 - Applicability dates.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 1 2013-10-01 2013-10-01 false Applicability dates. 37.181 Section 37.181 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.181 Applicability dates. This subpart applies to...

  2. 49 CFR 37.181 - Applicability dates.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 1 2011-10-01 2011-10-01 false Applicability dates. 37.181 Section 37.181 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.181 Applicability dates. This subpart applies to...

  3. 49 CFR 37.181 - Applicability dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Applicability dates. 37.181 Section 37.181 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.181 Applicability dates. This subpart applies to...

  4. December 21, 2012: A Date of Opportunity

    ERIC Educational Resources Information Center

    Gray, Shirley B.; Rice, Zebanya

    2012-01-01

    Certain dates stand out in history--October 12, 1492; July 4, 1776; and May 8, 1945, to name a few. Will December 21, 2012, become such a date? The popular media have seized on 12/21/12 to make apocalyptical prognostications, some venturing so far as to predict the end of the world. Scholars reject such predictions. But major archeological finds…

  5. 16 CFR 1209.11 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 2 2014-01-01 2014-01-01 false Effective date. 1209.11 Section 1209.11 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS INTERIM SAFETY STANDARD FOR CELLULOSE INSULATION The Standard § 1209.11 Effective date. All cellulose...

  6. 16 CFR 1209.11 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 16 Commercial Practices 2 2011-01-01 2011-01-01 false Effective date. 1209.11 Section 1209.11 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS INTERIM SAFETY STANDARD FOR CELLULOSE INSULATION The Standard § 1209.11 Effective date. All cellulose...

  7. 16 CFR 1209.11 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 16 Commercial Practices 2 2013-01-01 2013-01-01 false Effective date. 1209.11 Section 1209.11 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS INTERIM SAFETY STANDARD FOR CELLULOSE INSULATION The Standard § 1209.11 Effective date. All cellulose...

  8. 16 CFR 1209.11 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 16 Commercial Practices 2 2012-01-01 2012-01-01 false Effective date. 1209.11 Section 1209.11 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS INTERIM SAFETY STANDARD FOR CELLULOSE INSULATION The Standard § 1209.11 Effective date. All cellulose...

  9. 75 FR 57252 - Designated Transfer Date

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-20

    ... Protection Act. Section 1062 of the CFP Act, in relevant part, requires the Secretary to designate a single... Agencies Section 1062(a)(1) requires the Secretary to consult with the heads of the seven ``transferor... section 1062(c)(1), select a date between 6 and 12 months after the date of enactment of the CFP Act...

  10. 17 CFR 44.01 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 1 2011-04-01 2011-04-01 false Effective date. 44.01 Section 44.01 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION INTERIM FINAL RULE FOR PRE-ENACTMENT SWAP TRANSACTIONS § 44.01 Effective date. The provisions of this part are...

  11. 40 CFR 202.11 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 25 2011-07-01 2011-07-01 false Effective date. 202.11 Section 202.11 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) NOISE ABATEMENT PROGRAMS MOTOR CARRIERS ENGAGED IN INTERSTATE COMMERCE General Provisions § 202.11 Effective date. The provisions of Subpart...

  12. 21 CFR 861.36 - Effective dates.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Effective dates. 861.36 Section 861.36 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... standard will set forth the date upon which it will take effect. To the extent practical, consistent...

  13. 21 CFR 861.36 - Effective dates.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Effective dates. 861.36 Section 861.36 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... standard will set forth the date upon which it will take effect. To the extent practical, consistent...

  14. Radiocarbon dating of the Shroud of Turin

    NASA Astrophysics Data System (ADS)

    Damon, P. E.; Donahue, D. J.; Gore, B. H.; Hatheway, A. L.; Jull, A. J. T.; Linick, T. W.; Sercel, P. J.; Toolin, L. J.; Bronk, C. R.; Hall, E. T.; Hedges, R. E. M.; Housley, R.; Law, I. A.; Perry, C.; Bonani, G.; Trumbore, S.; Woelfli, W.; Ambers, J. C.; Bowman, S. G. E.; Leese, M. N.; Tite, M. S.

    1989-02-01

    Very small samples from the Shroud of Turin have been dated by accelerator mass spectrometry in laboratories at Arizona, Oxford and Zurich. As controls, three samples whose ages had been determined independently were also dated. The results provide conclusive evidence that the linen of the Shroud of Turin is mediaeval.

  15. 5 CFR 841.508 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Effective date. 841.508 Section 841.508 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) FEDERAL....508 Effective date. The employee deductions specified in § 841.503 are effective on the later of...

  16. 28 CFR 36.508 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 28 Judicial Administration 1 2013-07-01 2013-07-01 false Effective date. 36.508 Section 36.508 Judicial Administration DEPARTMENT OF JUSTICE NONDISCRIMINATION ON THE BASIS OF DISABILITY BY PUBLIC ACCOMMODATIONS AND IN COMMERCIAL FACILITIES Enforcement § 36.508 Effective date. (a) General. Except as...

  17. 28 CFR 36.508 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 28 Judicial Administration 1 2014-07-01 2014-07-01 false Effective date. 36.508 Section 36.508 Judicial Administration DEPARTMENT OF JUSTICE NONDISCRIMINATION ON THE BASIS OF DISABILITY BY PUBLIC ACCOMMODATIONS AND IN COMMERCIAL FACILITIES Enforcement § 36.508 Effective date. (a) General. Except as...

  18. 40 CFR 19.2 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 1 2011-07-01 2011-07-01 false Effective date. 19.2 Section 19.2 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL ADJUSTMENT OF CIVIL MONETARY PENALTIES FOR INFLATION § 19.2 Effective date. The increased penalty amounts set forth in the last column of Table 1...

  19. 33 CFR 106.110 - Compliance dates.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Compliance dates. 106.110 Section 106.110 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES General § 106.110 Compliance dates. (a) On...

  20. 33 CFR 106.110 - Compliance dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Compliance dates. 106.110 Section 106.110 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES General § 106.110 Compliance dates. (a) On...

  1. 33 CFR 106.110 - Compliance dates.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Compliance dates. 106.110 Section 106.110 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES General § 106.110 Compliance dates. (a) On...

  2. Dating volcanic ash by use of thermoluminescence

    SciTech Connect

    Berger, G.W. )

    1992-01-01

    The fine-silt-sized (4-11 {mu}m) grains of glass separated from four samples of independently dated, 8 to 400 ka, tephra beds provide accurate thermoluminescence (TL) ages. This demonstration of reliable TL dating of volcanic glass provides a new tephrochronometer for deposits spanning the Holocene to middle Pleistocene age range.

  3. 21 CFR 898.13 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PERFORMANCE STANDARD FOR ELECTRODE LEAD WIRES AND PATIENT CABLES § 898.13 Compliance dates. The dates for compliance with the standard set forth in § 898.12(a) shall be as follows: (a) For electrode lead wires...

  4. 21 CFR 898.13 - Compliance dates.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PERFORMANCE STANDARD FOR ELECTRODE LEAD WIRES AND PATIENT CABLES § 898.13 Compliance dates. The dates for compliance with the standard set forth in § 898.12(a) shall be as follows: (a) For electrode lead wires...

  5. 21 CFR 898.13 - Compliance dates.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PERFORMANCE STANDARD FOR ELECTRODE LEAD WIRES AND PATIENT CABLES § 898.13 Compliance dates. The dates for compliance with the standard set forth in § 898.12(a) shall be as follows: (a) For electrode lead wires...

  6. 21 CFR 211.137 - Expiration dating.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 4 2011-04-01 2011-04-01 false Expiration dating. 211.137 Section 211.137 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) DRUGS... § 211.137 Expiration dating. (a) To assure that a drug product meets applicable standards of...

  7. 21 CFR 211.137 - Expiration dating.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 4 2010-04-01 2010-04-01 false Expiration dating. 211.137 Section 211.137 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) DRUGS... § 211.137 Expiration dating. (a) To assure that a drug product meets applicable standards of...

  8. 16 CFR 1209.11 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Effective date. 1209.11 Section 1209.11 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS INTERIM SAFETY STANDARD FOR CELLULOSE INSULATION The Standard § 1209.11 Effective date. All cellulose...

  9. Teen Dating Violence Prevention Program Assessment

    ERIC Educational Resources Information Center

    Lucas, Quincy Arrianna Rose

    2013-01-01

    The American Psychological Association (APA) has identified the prevention of and intervention in relationship violence as a top priority (APA, n.d.). According to the Center for Disease Control and Prevention's 2012 Teen Dating Violence Fact Sheet, dating violence is a serious problem in the United States. In accordance with Foshee et al. (1998):…

  10. 16 CFR 1203.31 - Applicability date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Applicability date. 1203.31 Section 1203.31 Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY ACT REGULATIONS SAFETY STANDARD FOR BICYCLE HELMETS Certification § 1203.31 Applicability date. All bicycle helmets...

  11. 26 CFR 514.10 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 19 2010-04-01 2010-04-01 false Effective date. 514.10 Section 514.10 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) REGULATIONS UNDER TAX CONVENTIONS FRANCE Withholding of Tax § 514.10 Effective date. The provisions of §§ 514.1 through 517.9 shall...

  12. Date palm production and pest management challenges

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Abstract: Date palm, Phoenix dactylifera, is a monocotyledonous species belong- ing to the palm family (Arecaceae or Palmae) which is perennial and dioecious and cultivated mostly in the arid regions of the world. Date palm is important to the agrarian economy of several countries, with the ability ...

  13. 40 CFR 469.21 - Compliance dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 30 2014-07-01 2014-07-01 false Compliance dates. 469.21 Section 469.21 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND... date for PSES for total toxic organics (TTO) is July 1, 1984 and for arsenic is November 8, 1985....

  14. 24 CFR 91.15 - Submission date.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Submission date. 91.15 Section 91.15 Housing and Urban Development Office of the Secretary, Department of Housing and Urban Development CONSOLIDATED SUBMISSIONS FOR COMMUNITY PLANNING AND DEVELOPMENT PROGRAMS General § 91.15 Submission date....

  15. 40 CFR 141.152 - Effective dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Effective dates. 141.152 Section 141.152 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Consumer Confidence Reports § 141.152 Effective dates. (a)...

  16. 16 CFR 318.8 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Effective date. 318.8 Section 318.8 Commercial Practices FEDERAL TRADE COMMISSION REGULATIONS UNDER SPECIFIC ACTS OF CONGRESS HEALTH BREACH NOTIFICATION RULE § 318.8 Effective date. This part shall apply to breaches of security that are discovered...

  17. 38 CFR 21.4131 - Commencing dates.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...—the course or subject leads to a standard college degree. (1) When the student enrolls in a course... lead to a standard college degree. (1) Residence school: See paragraph (b) of this section. (2... the earlier of the following dates: (1) The date the tuition and fees are no longer being paid...

  18. 38 CFR 21.4131 - Commencing dates.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...—the course or subject leads to a standard college degree. (1) When the student enrolls in a course... lead to a standard college degree. (1) Residence school: See paragraph (b) of this section. (2... the earlier of the following dates: (1) The date the tuition and fees are no longer being paid...

  19. 38 CFR 21.4131 - Commencing dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...—the course or subject leads to a standard college degree. (1) When the student enrolls in a course... lead to a standard college degree. (1) Residence school: See paragraph (b) of this section. (2... the earlier of the following dates: (1) The date the tuition and fees are no longer being paid...

  20. 38 CFR 21.4131 - Commencing dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...—the course or subject leads to a standard college degree. (1) When the student enrolls in a course... lead to a standard college degree. (1) Residence school: See paragraph (b) of this section. (2... the earlier of the following dates: (1) The date the tuition and fees are no longer being paid...

  1. 38 CFR 21.4131 - Commencing dates.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...—the course or subject leads to a standard college degree. (1) When the student enrolls in a course... lead to a standard college degree. (1) Residence school: See paragraph (b) of this section. (2... the earlier of the following dates: (1) The date the tuition and fees are no longer being paid...

  2. 28 CFR 57.4 - Expiration date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 28 Judicial Administration 2 2013-07-01 2013-07-01 false Expiration date. 57.4 Section 57.4 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) INVESTIGATION OF DISCRIMINATION IN THE SUPPLY OF PETROLEUM TO THE ARMED FORCES § 57.4 Expiration date. This part shall remain in effect until...

  3. 28 CFR 57.4 - Expiration date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 28 Judicial Administration 2 2014-07-01 2014-07-01 false Expiration date. 57.4 Section 57.4 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) INVESTIGATION OF DISCRIMINATION IN THE SUPPLY OF PETROLEUM TO THE ARMED FORCES § 57.4 Expiration date. This part shall remain in effect until...

  4. 28 CFR 57.4 - Expiration date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 28 Judicial Administration 2 2011-07-01 2011-07-01 false Expiration date. 57.4 Section 57.4 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) INVESTIGATION OF DISCRIMINATION IN THE SUPPLY OF PETROLEUM TO THE ARMED FORCES § 57.4 Expiration date. This part shall remain in effect until...

  5. 28 CFR 57.4 - Expiration date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 28 Judicial Administration 2 2012-07-01 2012-07-01 false Expiration date. 57.4 Section 57.4 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) INVESTIGATION OF DISCRIMINATION IN THE SUPPLY OF PETROLEUM TO THE ARMED FORCES § 57.4 Expiration date. This part shall remain in effect until...

  6. 28 CFR 57.4 - Expiration date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Expiration date. 57.4 Section 57.4 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) INVESTIGATION OF DISCRIMINATION IN THE SUPPLY OF PETROLEUM TO THE ARMED FORCES § 57.4 Expiration date. This part shall remain in effect until...

  7. 40 CFR 62.1952 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Delaware Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.1952 Effective date. The effective date of the plan for municipal solid waste landfills is November 16, 1999. Emissions From...

  8. 40 CFR 62.1352 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Colorado Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.1352 Effective date. The effective date of the plan for municipal solid waste landfills is September 28, 1998. Air Emissions From Hospital/Medical/Infectious...

  9. 40 CFR 62.3332 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Illinois Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3332 Effective date. The effective date of the plan for municipal solid waste landfills is January 22, 1999. Emissions From Small Municipal Waste Combustion...

  10. 40 CFR 62.9632 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Pennsylvania Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.9632 Effective date. The effective date of the plan for municipal solid waste landfills is April 16, 1999....

  11. 40 CFR 62.5152 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Maryland Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.5152 Effective date. The effective date of the plan for municipal solid waste landfills is November 8, 1999. Emissions From Existing...

  12. 40 CFR 62.1952 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Delaware Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.1952 Effective date. The effective date of the plan for municipal solid waste landfills is November 16, 1999. Emissions From...

  13. 40 CFR 62.5152 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Maryland Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.5152 Effective date. The effective date of the plan for municipal solid waste landfills is November 8, 1999. Emissions From Existing...

  14. 40 CFR 62.4632 - Effective Date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Louisiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.4632 Effective Date. The effective date of the portion of the plan applicable to existing municipal solid waste landfills is October 28, 1997. Air Emissions...

  15. 40 CFR 62.12602 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Wyoming Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.12602 Effective date. The effective date of the plan for municipal solid waste landfills is July 31, 1998. Air Emissions From...

  16. 40 CFR 62.4632 - Effective Date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Louisiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.4632 Effective Date. The effective date of the portion of the plan applicable to existing municipal solid waste landfills is October 28, 1997. Air Emissions...

  17. 40 CFR 62.8602 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS North Dakota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8602 Effective date. The effective date of the plan for municipal solid waste landfills is February 13, 1998. Air Emissions From Hospital/Medical/Infectious...

  18. 40 CFR 62.6602 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Montana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.6602 Effective date. The effective date of the plan for municipal solid waste landfills is September 8, 1998. Air Emissions From Hospital/Medical/Infectious...

  19. 40 CFR 62.3332 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Illinois Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3332 Effective date. The effective date of the plan for municipal solid waste landfills is January 22, 1999. Emissions From Small Municipal Waste Combustion...

  20. 40 CFR 62.4632 - Effective Date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Louisiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.4632 Effective Date. The effective date of the portion of the plan applicable to existing municipal solid waste landfills is October 28, 1997. Air Emissions...

  1. 40 CFR 62.8872 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Ohio Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8872 Effective date. The effective date of the plan for municipal solid waste landfills is October 6, 1998. Emissions From Hospital, Medical, and Infectious Waste...

  2. 40 CFR 62.6602 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Montana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.6602 Effective date. The effective date of the plan for municipal solid waste landfills is September 8, 1998. Air Emissions From Hospital/Medical/Infectious...

  3. 40 CFR 62.1952 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Delaware Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.1952 Effective date. The effective date of the plan for municipal solid waste landfills is November 16, 1999. Emissions From...

  4. 40 CFR 62.3632 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Indiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3632 Effective date. The effective date of the plan for municipal solid waste landfills is May 30, 2000. Metals, Acid Gases, Organic Compounds and Nitrogen...

  5. 40 CFR 62.6602 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Montana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.6602 Effective date. The effective date of the plan for municipal solid waste landfills is September 8, 1998. Air Emissions From Hospital/Medical/Infectious...

  6. 40 CFR 62.9632 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Pennsylvania Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.9632 Effective date. The effective date of the plan for municipal solid waste landfills is April 16, 1999....

  7. 40 CFR 62.1352 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Colorado Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.1352 Effective date. The effective date of the plan for municipal solid waste landfills is September 28, 1998. Air Emissions From Hospital/Medical/Infectious...

  8. 40 CFR 62.8872 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Ohio Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8872 Effective date. The effective date of the plan for municipal solid waste landfills is October 6, 1998. Emissions From Hospital, Medical, and Infectious Waste...

  9. 40 CFR 62.5152 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Maryland Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.5152 Effective date. The effective date of the plan for municipal solid waste landfills is November 8, 1999. Emissions From Existing...

  10. 40 CFR 62.12127 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS West Virginia Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.12127 Effective date. The effective date of the plan for municipal solid waste landfills is July 23, 2001....

  11. 40 CFR 62.3332 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Illinois Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3332 Effective date. The effective date of the plan for municipal solid waste landfills is January 22, 1999. Emissions From Small Municipal Waste Combustion...

  12. 40 CFR 62.5862 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Minnesota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.5862 Effective date. The effective date of the plan for municipal solid waste landfills is September 25, 1998. Existing Large Municipal Waste Combustors...

  13. 40 CFR 62.5862 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Minnesota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.5862 Effective date. The effective date of the plan for municipal solid waste landfills is September 25, 1998. Existing Large Municipal Waste Combustors...

  14. 40 CFR 62.4632 - Effective Date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Louisiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.4632 Effective Date. The effective date of the portion of the plan applicable to existing municipal solid waste landfills is October 28, 1997. Air Emissions...

  15. 40 CFR 62.5862 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Minnesota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.5862 Effective date. The effective date of the plan for municipal solid waste landfills is September 25, 1998. Existing Large Municipal Waste Combustors...

  16. 40 CFR 62.5862 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Minnesota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.5862 Effective date. The effective date of the plan for municipal solid waste landfills is September 25, 1998. Existing Large Municipal Waste Combustors...

  17. 40 CFR 62.1352 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Colorado Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.1352 Effective date. The effective date of the plan for municipal solid waste landfills is September 28, 1998. Air Emissions From Hospital/Medical/Infectious...

  18. 40 CFR 62.8602 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS North Dakota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8602 Effective date. The effective date of the plan for municipal solid waste landfills is February 13, 1998. Air Emissions From Hospital/Medical/Infectious...

  19. 40 CFR 62.3332 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Illinois Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3332 Effective date. The effective date of the plan for municipal solid waste landfills is January 22, 1999. Emissions From Small Municipal Waste Combustion...

  20. 40 CFR 62.8602 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS North Dakota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8602 Effective date. The effective date of the plan for municipal solid waste landfills is February 13, 1998. Air Emissions From Hospital/Medical/Infectious...

  1. 40 CFR 62.5152 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Maryland Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.5152 Effective date. The effective date of the plan for municipal solid waste landfills is November 8, 1999. Emissions From Existing...

  2. 40 CFR 62.1952 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Delaware Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.1952 Effective date. The effective date of the plan for municipal solid waste landfills is November 16, 1999. Emissions From...

  3. 40 CFR 62.3632 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Indiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3632 Effective date. The effective date of the plan for municipal solid waste landfills is May 30, 2000. Metals, Acid Gases, Organic Compounds and Nitrogen...

  4. 40 CFR 62.3632 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Indiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3632 Effective date. The effective date of the plan for municipal solid waste landfills is May 30, 2000. Metals, Acid Gases, Organic Compounds and Nitrogen...

  5. 40 CFR 62.3632 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Indiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3632 Effective date. The effective date of the plan for municipal solid waste landfills is May 30, 2000. Metals, Acid Gases, Organic Compounds and Nitrogen...

  6. 40 CFR 62.1952 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Delaware Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.1952 Effective date. The effective date of the plan for municipal solid waste landfills is November 16, 1999. Emissions From...

  7. 40 CFR 62.6602 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Montana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.6602 Effective date. The effective date of the plan for municipal solid waste landfills is September 8, 1998. Air Emissions From Hospital/Medical/Infectious...

  8. 40 CFR 62.1352 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Colorado Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.1352 Effective date. The effective date of the plan for municipal solid waste landfills is September 28, 1998. Air Emissions From Hospital/Medical/Infectious...

  9. 40 CFR 62.5152 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Maryland Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.5152 Effective date. The effective date of the plan for municipal solid waste landfills is November 8, 1999. Emissions From Existing...

  10. 40 CFR 62.11112 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Utah Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.11112 Effective date. The effective date of the plan for municipal solid waste landfills is March 16, 1998. Air Emissions From...

  11. 40 CFR 62.5862 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Minnesota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.5862 Effective date. The effective date of the plan for municipal solid waste landfills is September 25, 1998. Existing Large Municipal Waste Combustors...

  12. 40 CFR 62.9637 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Pennsylvania Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.9637 Effective date. The effective date of the plan for municipal solid waste landfills is January 28, 2004. Metals, Acid Gases,...

  13. 40 CFR 62.1352 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Colorado Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.1352 Effective date. The effective date of the plan for municipal solid waste landfills is September 28, 1998. Air Emissions From Hospital/Medical/Infectious...

  14. 40 CFR 62.10352 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS South Dakota Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.10352 Effective date. The effective date of the plan for municipal solid waste landfills is August 2, 1999. Air Emissions From...

  15. 40 CFR 62.3332 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Illinois Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3332 Effective date. The effective date of the plan for municipal solid waste landfills is January 22, 1999. Emissions From Small Municipal Waste Combustion...

  16. 40 CFR 62.9632 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Pennsylvania Landfill Gas Emissions from Existing Municipal Solid Waste Landfills (section 111(d) Plan) § 62.9632 Effective date. The effective date of the plan for municipal solid waste landfills is April 16, 1999....

  17. 40 CFR 62.6602 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Montana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.6602 Effective date. The effective date of the plan for municipal solid waste landfills is September 8, 1998. Air Emissions From Hospital/Medical/Infectious...

  18. 40 CFR 62.4632 - Effective Date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Louisiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.4632 Effective Date. The effective date of the portion of the plan applicable to existing municipal solid waste landfills is October 28, 1997. Air Emissions...

  19. 40 CFR 62.3632 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Indiana Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.3632 Effective date. The effective date of the plan for municipal solid waste landfills is May 30, 2000. Metals, Acid Gases, Organic Compounds and Nitrogen...

  20. 40 CFR 62.9652 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Hospital/medical/infectious Waste Incinerators (hmiwis) (section 111(d)/129 Plan) § 62.9652 Effective date. The effective date of the plan is June 17, 2002. Emissions From Existing Hospital/Medical/Infectious Waste Incinerators (HMIWIs) (Section 111(d)/129 Plan) Source: Sections 62.9660 through 62.9662 appear...

  1. 40 CFR 62.11122 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Hospital/medical/infectious Waste Incinerators § 62.11122 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than...

  2. 40 CFR 62.8612 - Effective Date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .../medical/infectious Waste Incinerators § 62.8612 Effective Date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is July 12, 1999. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per Day...

  3. 40 CFR 62.1362 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .../medical/infectious Waste Incinerators § 62.1362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per...

  4. 40 CFR 62.8612 - Effective Date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .../medical/infectious Waste Incinerators § 62.8612 Effective Date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is July 12, 1999. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per Day...

  5. 40 CFR 62.8612 - Effective Date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .../medical/infectious Waste Incinerators § 62.8612 Effective Date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is July 12, 1999. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per Day...

  6. 40 CFR 62.1362 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .../medical/infectious Waste Incinerators § 62.1362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per...

  7. 40 CFR 62.9652 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Hospital/medical/infectious Waste Incinerators (hmiwis) (section 111(d)/129 Plan) § 62.9652 Effective date. The effective date of the plan is June 17, 2002. Emissions From Existing Hospital/Medical/Infectious Waste Incinerators (HMIWIs) (Section 111(d)/129 Plan) Source: Sections 62.9660 through 62.9662 appear...

  8. 40 CFR 62.1977 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .../medical/infectious Waste Incinerators (hmiwi) (section 111(d)/129 Plan) § 62.1977 Effective date. The effective date of the plan for hospital/medical/infectious waste incinerators is June 13, 2000. Emissions From Existing Small Municipal Waste Combustion Units...

  9. 40 CFR 62.1362 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .../medical/infectious Waste Incinerators § 62.1362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per...

  10. 40 CFR 62.8612 - Effective Date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    .../medical/infectious Waste Incinerators § 62.8612 Effective Date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is July 12, 1999. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per Day...

  11. 40 CFR 62.8612 - Effective Date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .../medical/infectious Waste Incinerators § 62.8612 Effective Date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is July 12, 1999. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per Day...

  12. 40 CFR 62.9652 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Hospital/medical/infectious Waste Incinerators (hmiwis) (section 111(d)/129 Plan) § 62.9652 Effective date. The effective date of the plan is June 17, 2002. Emissions From Existing Hospital/Medical/Infectious Waste Incinerators (HMIWIs) (Section 111(d)/129 Plan) Source: Sections 62.9660 through 62.9662 appear...

  13. 40 CFR 62.10362 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Emissions from Hospital/medical/infectious Waste Incinerators § 62.10362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn...

  14. 40 CFR 62.1362 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .../medical/infectious Waste Incinerators § 62.1362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per...

  15. 40 CFR 62.10362 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Emissions from Hospital/medical/infectious Waste Incinerators § 62.10362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn...

  16. 40 CFR 62.9652 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Hospital/medical/infectious Waste Incinerators (hmiwis) (section 111(d)/129 Plan) § 62.9652 Effective date. The effective date of the plan is June 17, 2002. Emissions From Existing Hospital/Medical/Infectious Waste Incinerators (HMIWIs) (Section 111(d)/129 Plan) Source: Sections 62.9660 through 62.9662 appear...

  17. 40 CFR 62.1362 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    .../medical/infectious Waste Incinerators § 62.1362 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than 250 Tons Per...

  18. 40 CFR 62.11122 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Hospital/medical/infectious Waste Incinerators § 62.11122 Effective date. The effective date for the portion of the plan applicable to existing hospital/medical/infectious waste incinerators is August 21, 2000. Emissions From Existing Municipal Waste Combustors With the Capacity To Burn Greater Than...

  19. Graviton resonances on deformed branes

    NASA Astrophysics Data System (ADS)

    Cruz, W. T.; Gomes, A. R.; Almeida, C. A. S.

    2011-11-01

    Plane-wave solutions of Schrödinger-like equations obtained from the metric perturbations in 5D braneworld scenarios can present resonant modes. The search for those structures is important because they can provide us with massive modes with not suppressed couplings with the membrane. We propose in this paper the study of graviton Kaluza-Klein spectrum in a special kind of membrane that possesses internal structure. The interest in the study of these deformed defects is due to the fact that they have a richer internal structure that has implications in the matter energy density along the extra dimensions and this produces a space-time background whose curvature has a splitting, if compared to the usual kink-like models. Such models arise from (4, 1)-branes constructed with one scalar field coupled with gravity where we find two-kink solutions from deformations of a phi4 potential. The main objective of this work is to observe the effects of deformation process in the resonant modes as well as in the coupling between the graviton massive modes and the brane.

  20. Realistic haptic rendering of interacting deformable objects in virtual environments.

    PubMed

    Duriez, Christian; Dubois, Frédéric; Kheddar, Abderrahmane; Andriot, Claude

    2006-01-01

    A new computer haptics algorithm to be used in general interactive manipulations of deformable virtual objects is presented. In multimodal interactive simulations, haptic feedback computation often comes from contact forces. Subsequently, the fidelity of haptic rendering depends significantly on contact space modeling. Contact and friction laws between deformable models are often simplified in up to date methods. They do not allow a "realistic" rendering of the subtleties of contact space physical phenomena (such as slip and stick effects due to friction or mechanical coupling between contacts). In this paper, we use Signorini's contact law and Coulomb's friction law as a computer haptics basis. Real-time performance is made possible thanks to a linearization of the behavior in the contact space, formulated as the so-called Delassus operator, and iteratively solved by a Gauss-Seidel type algorithm. Dynamic deformation uses corotational global formulation to obtain the Delassus operator in which the mass and stiffness ratio are dissociated from the simulation time step. This last point is crucial to keep stable haptic feedback. This global approach has been packaged, implemented, and tested. Stable and realistic 6D haptic feedback is demonstrated through a clipping task experiment.

  1. Neighborhood Factors and Dating Violence Among Youth

    PubMed Central

    Johnson, Renee M.; Parker, Elizabeth M.; Rinehart, Jenny; Nail, Jennifer; Rothman, Emily F.

    2015-01-01

    Context The purpose of this review is to summarize the empirical research on neighborhood-level factors and dating violence among adolescents and emerging adults to guide future research and practice. Evidence acquisition In 2015, 20 articles were identified through a search of the literature using PubMed. Eligible articles included those that: (1) had been published in a peer-reviewed journal since 2005; (2) reported a measure of association between at least one neighborhood-level factor and dating violence; and (3) had a study population of youth aged <26 years. We abstracted information about the studies, including measurement of dating violence and neighborhood factors, and measures of effect. Evidence synthesis Results were summarized into three categories based on the aspect of neighborhood which was the focus of the work: demographic and structural characteristics (n=11), neighborhood disorder (n=12), and social disorganization (n=8). There was some evidence to suggest that neighborhood disadvantage is associated with dating violence, but very little evidence to suggest that residence characteristics (e.g., racial heterogeneity) are associated with dating violence. Results do suggest that perceived neighborhood disorder is associated with physical dating violence perpetration, but do not suggest that it is associated with physical dating violence victimization. Social control and community connectedness are both associated with dating violence, but findings on collective efficacy are mixed. Conclusions Existing research suggests that neighborhood factors may be associated with dating violence. However, there is a limited body of research on the neighborhood context of dating violence and more rigorous research is needed. PMID:26296444

  2. Integrable Deformations of T -Dual σ Models

    NASA Astrophysics Data System (ADS)

    Borsato, Riccardo; Wulff, Linus

    2016-12-01

    We present a method to deform (generically non-Abelian) T duals of two-dimensional σ models, which preserves classical integrability. The deformed models are identified by a linear operator ω on the dualized subalgebra, which satisfies the 2-cocycle condition. We prove that the so-called homogeneous Yang-Baxter deformations are equivalent, via a field redefinition, to our deformed models when ω is invertible. We explain the details for deformations of T duals of principal chiral models, and present the corresponding generalization to the case of supercoset models.

  3. Accidental degeneracies in nonlinear quantum deformed systems

    NASA Astrophysics Data System (ADS)

    Aleixo, A. N. F.; Balantekin, A. B.

    2011-09-01

    We construct a multi-parameter nonlinear deformed algebra for quantum confined systems that includes many other deformed models as particular cases. We demonstrate that such systems exhibit the property of accidental pairwise energy level degeneracies. We also study, as a special case of our multi-parameter deformation formalism, the extension of the Tamm-Dancoff cutoff deformed oscillator and the occurrence of accidental pairwise degeneracy in the energy levels of the deformed system. As an application, we discuss the case of a trigonometric Rosen-Morse potential, which is successfully used in models for quantum confined systems, ranging from electrons in quantum dots to quarks in hadrons.

  4. Occurrence of oral deformities in larval anurans

    USGS Publications Warehouse

    Drake, D.L.; Altig, R.; Grace, J.B.; Walls, S.C.

    2007-01-01

    We quantified deformities in the marginal papillae, tooth rows, and jaw sheaths of tadpoles from 13 population samples representing three families and 11 sites in the southeastern United States. Oral deformities were observed in all samples and in 13.5-98% of the specimens per sample. Batrachochytrium dendrobatidis (chytrid) infections were detected in three samples. There was high variability among samples in the pattern and number of discovered deformities. Pairwise associations between oral structures containing deformities were nonrandom for several populations, especially those with B. dendrobatidis infections or high total numbers of deformities. Comparisons of deformities among samples using multivariate analyses revealed that tadpole samples grouped together by family. Analyses of ordination indicated that three variables, the number of deformities, the number of significant associations among deformity types within populations, and whether populations were infected with B. dendrobatidis, were significantly correlated with the pattern of deformities. Our data indicate that the incidence of oral deformities can be high in natural populations and that phylogeny and B. dendrobatidis infection exert a strong influence on the occurrence and type of oral deformities in tadpoles. ?? by the American Society of Ichthyologists and Herperologists.

  5. Mesh deformation based on artificial neural networks

    NASA Astrophysics Data System (ADS)

    Stadler, Domen; Kosel, Franc; Čelič, Damjan; Lipej, Andrej

    2011-09-01

    In the article a new mesh deformation algorithm based on artificial neural networks is introduced. This method is a point-to-point method, meaning that it does not use connectivity information for calculation of the mesh deformation. Two already known point-to-point methods, based on interpolation techniques, are also presented. In contrast to the two known interpolation methods, the new method does not require a summation over all boundary nodes for one displacement calculation. The consequence of this fact is a shorter computational time of mesh deformation, which is proven by different deformation tests. The quality of the deformed meshes with all three deformation methods was also compared. Finally, the generated and the deformed three-dimensional meshes were used in the computational fluid dynamics numerical analysis of a Francis water turbine. A comparison of the analysis results was made to prove the applicability of the new method in every day computation.

  6. Helium release during shale deformation: Experimental validation

    NASA Astrophysics Data System (ADS)

    Bauer, Stephen J.; Gardner, W. Payton; Heath, Jason E.

    2016-07-01

    This work describes initial experimental results of helium tracer release monitoring during deformation of shale. Naturally occurring radiogenic 4He is present in high concentration in most shales. During rock deformation, accumulated helium could be released as fractures are created and new transport pathways are created. We present the results of an experimental study in which confined reservoir shale samples, cored parallel and perpendicular to bedding, which were initially saturated with helium to simulate reservoir conditions, are subjected to triaxial compressive deformation. During the deformation experiment, differential stress, axial, and radial strains are systematically tracked. Release of helium is dynamically measured using a helium mass spectrometer leak detector. Helium released during deformation is observable at the laboratory scale and the release is tightly coupled to the shale deformation. These first measurements of dynamic helium release from rocks undergoing deformation show that helium provides information on the evolution of microstructure as a function of changes in stress and strain.

  7. Longitudinal relationships between individual and class norms supporting dating violence and perpetration of dating violence.

    PubMed

    Taylor, Katherine A; Sullivan, Terri N; Farrell, Albert D

    2015-03-01

    Dating violence is commonly perpetrated in adolescence, making it imperative to understand risk factors in order to inform prevention efforts. Although individual norms supporting dating violence are strongly related to its perpetration, few studies have examined their longitudinal impact. Moreover, the influence of class norms (i.e., norms for students in the same grade, cohort, and school) supporting dating violence on perpetration has rarely been studied. The current study examined longitudinal relationships between individual and class norms supporting dating violence and perpetration of physical and psychological dating violence. Participants were two cohorts of sixth graders from 37 schools who were in dating relationships at Wave 1 and 6 months later at Wave 2 (N = 2,022; 43% female; 52% African American, 21% Latino/a, 20% White, and 7% other). The analyses used a multilevel approach, with students represented at Level 1 and classes (n = 74) at Level 2. The models tested direct effects of Wave 1 individual and class norms supporting dating violence on subsequent changes in perpetration of dating violence at Wave 2 and the extent to which gender moderated these relationships. The findings indicated that greater individual norms supporting male dating violence predicted greater change in perpetration of physical and psychological dating violence and greater individual norms supporting female dating violence predicted greater change in perpetration of psychological dating violence. Greater class norms supporting male dating violence predicted greater change in perpetration of physical dating violence; whereas greater class norms supporting female dating violence predicted less change in perpetration of physical dating violence. These findings highlight the need to address norms in early adolescence.

  8. A Phenomenological Investigation of Adolescent Dating Relationships and Dating Violence Counseling Interventions

    ERIC Educational Resources Information Center

    Hays, Danica G.; Michel, Rebecca E.; Cole, Rebekah F.; Emelianchik, Kelly; Forman, Julia; Lorelle, Sonya; McBride, Rebecca; Sikes, April

    2011-01-01

    Despite the prevalence of dating violence, incidences often go unreported due to a lack of awareness among students as to appropriate dating behaviors. This phenomenology investigated how adolescents conceptualize and experience dating relationships. We explored adolescent females' definitions of healthy and abusive relationships, experiences with…

  9. Teen dating abuse: recognition and interventions.

    PubMed

    Freeman, Sally Ann; Rosenbluth, Barri; Cotton, Laura

    2013-03-01

    Teen dating abuse, also known as teen dating violence, is a significant public health issue. Adolescents with a history of dating abuse may struggle academically and experience increased risk for serious injury or even death. They may engage in risky sexual behavior, substance abuse, and unhealthy dieting and exhibit suicidal behaviors. School nurses may be the first adults that teens confide in when experiencing dating abuse and may lack the knowledge and skills to intervene with teens involved in unhealthy dating relationships. Beginning in 2008, Dell Children s Medical Center in Austin, Texas, partnered with SafePlace (a local nonprofit that serves survivors of sexual and domestic violence) to address dating abuse. This collaboration is part of Start Strong Austin, one of 11 communities nationwide participating in the Start Strong: Building Healthy Teen Relationships Initiative funded by the Robert Wood Johnson Foundation. The Start Strong model employs innovative strategies in education, community engagement, policy change, and social marketing to prevent dating abuse before it starts.

  10. Direct Imaging of Deformation and Disorder in Extended-Chain Polymer Fibers

    DTIC Science & Technology

    1991-03-01

    Lenhert, T. J. Resch, and W. W. Adams, "Molecular Packing and Crystalline Order in Polybenzobisoxazole and Polybenzobisthiazole Fibers ", in...WL-TR-91-4011 AiAh 1A0 DIRECT IMAGING OF DEFORMATION AND DISORDER IN EXTENDED-CHAIN POLYMER FIBERS David C. Martin Department of Polymer Science and...Deformation and Disorder in Extended-Chain Polymer Fibers 12. PERSONAL AUTHOR(S) David C. Martin 13a. TYPE OF REPORT 13b. TIME COVERED 14. DATE OF REPORT (Year

  11. Zircon dating of oceanic crustal accretion.

    PubMed

    Lissenberg, C Johan; Rioux, Matthew; Shimizu, Nobumichi; Bowring, Samuel A; Mével, Catherine

    2009-02-20

    Most of Earth's present-day crust formed at mid-ocean ridges. High-precision uranium-lead dating of zircons in gabbros from the Vema Fracture Zone on the Mid-Atlantic Ridge reveals that the crust there grew in a highly regular pattern characterized by shallow melt delivery. Combined with results from previous dating studies, this finding suggests that two distinct modes of crustal accretion occur along slow-spreading ridges. Individual samples record a zircon date range of 90,000 to 235,000 years, which is interpreted to reflect the time scale of zircon crystallization in oceanic plutonic rocks.

  12. Thermoluminescence dating of Australian palaeo-earthquakes

    USGS Publications Warehouse

    Hutton, J.T.; Prescott, J.R.; Bowman, J.R.; Dunham, M.N.E.; Crone, A.J.; Machette, M.N.; Twidale, C.R.

    1994-01-01

    Thermoluminescence (TL) dating is a useful tool for determining the age of prehistoric earthquakes by dating deposits that are stratigraphically related to fault scarps that formed during the earthquakes. TL dating of aeolian sand in the area of the 1988 Tennant Creek, Northern Territory, earthquakes provides evidence that similar earthquakes have not ruptured the causative faults for at least 50 ka. Pilot TL measurements of deposits associated with the Roopena and Ash Ridge fault scarps near Whyalla on Eyre Peninsula, South Australia, suggest an age of 140 ka for the Quaternary deposits associated with the formation of the scarps. ?? 1994.

  13. Deformation and recrystallization mechanisms in naturally deformed sillimanites

    NASA Astrophysics Data System (ADS)

    Lambregts, P. J.; van Roermund, H. L. M.

    1990-07-01

    Prismatic sillimanite (Al 2SiO 5), with a length between 0.3 and 2.5 mm, was obtained from a garnet migmatite. The sillimanite, naturally deformed at a temperature of 750 ° C and a confining pressure of 6 kbar, has been studied using optical and transmission electron microscopy techniques. Optical and universal stage measurements reveal undulatory extinction, "sharp" deformation-induced subgrain boundaries (subparallel to (001) and (010)) and minor recrystallization. Transmission electron microscopy shows free dislocations, dislocation loops, (110) planar defects and tiltwalls parallel to (001). Dislocations have Burgers vectors of [001] and [100]. All isolated dislocations are dissociated. The dominant slip system is (100) [001] with subordinate (001) [100]. The microstructure of sillimanite indicates that recrystallization has occurred by a rotation mechanism (around [010]), where single crystals become polycrystals by the progressive development of numerous internal high-angle boundaries. The latter have been interpreted as originating from low-angle (001) tilt- and (010) twistwalls. Rotation recrystallization was followed by grain boundary migration.

  14. Leukocyte deformability: finite element modeling of large viscoelastic deformation.

    PubMed

    Dong, C; Skalak, R

    1992-09-21

    An axisymmetric deformation of a viscoelastic sphere bounded by a prestressed elastic thin shell in response to external pressure is studied by a finite element method. The research is motivated by the need for understanding the passive behavior of human leukocytes (white blood cells) and interpreting extensive experimental data in terms of the mechanical properties. The cell at rest is modeled as a sphere consisting of a cortical prestressed shell with incompressible Maxwell fluid interior. A large-strain deformation theory is developed based on the proposed model. General non-linear, large strain constitutive relations for the cortical shell are derived by neglecting the bending stiffness. A representation of the constitutive equations in the form of an integral of strain history for the incompressible Maxwell interior is used in the formulation of numerical scheme. A finite element program is developed, in which a sliding boundary condition is imposed on all contact surfaces. The mathematical model developed is applied to evaluate experimental data of pipette tests and observations of blood flow.

  15. Witnessing Interparental Violence and Acceptance of Dating Violence as Predictors for Teen Dating Violence Victimization.

    PubMed

    Karlsson, Marie E; Temple, Jeff R; Weston, Rebecca; Le, Vi Donna

    2016-04-01

    We examined the association between witnessing interparental violence, attitudes about dating violence, and physical and psychological teen dating violence (TDV) victimization. Participants were 918 teens with dating experience. Witnessing interparental violence and acceptance of dating violence were significant predictors of TDV victimization. Acceptance of dating violence was also a partial mediator between witnessing interparental violence and TDV victimization. Witnessing mother-to-father violence and acceptance of female-perpetrated violence were the most consistent predictors. TDV programs aiming to prevent victimization could benefit from targeting youth exposed to father-to-mother and mother-to-father violence, targeting attitudes about violence, and tailoring interventions to gender-specific risk factors.

  16. Plastic Deformation of Accreted Planetesimals

    NASA Astrophysics Data System (ADS)

    Kadish, J.

    2005-08-01

    The early stages of planetesimal growth follow an accretion model (Weidenschilling, Icarus 2000), which influences the intrinsic strength of a body and may control how its shape evolves after growth. In previous work we have determined the stress field of an accreted planetesimal accounting for possible variation in the object's spin as it accretes (Kadish et al., IJSS In Press) At the end of growth, these objects are subject to transport mechanisms that can distribute them throughout the solar system. As they are transported these objects can be spun-up by tidal forces (Scheeres et al, Icarus 2000), YORP (Bottke et al., Asteroids III 2002), and collisions (Binzel et al., Asteroids II 1989). Such an increase of spin will cause perturbations to the initial stress field and may lead to failure. We are able to show analytically that failure is initiated on the object's surface and a plastic zone propagates inward as the object's spin is increased. If we model an accreted body as a conglomeration of rocks similar to a gravel or sand, the deformation in the region of failure is characterized using a Mohr-Coulomb failure criterion with negligible cohesion and zero hardening(e.g. Holsapple, Icarus 2001). Such a response is highly non-linear and must be solved using finite elements and iterative methods (Simo and Hughes, Computational Inelasticity 1998). Using the commercial finite element code ABAQUS, we present the shape deformation resulting from an elasto-plastic analysis of a spinning, self-gravitating accreted sphere that is spun-up after growth is complete. The methodology can be extended to model plastic deformation due to local failure for more complex planetesimal shapes, such as for the asteroid Kleopatra. This work has implications for the evolution of planetesimal shapes, the creation of binary and contact binary asteroids, and for the maximum spin rate of small planetary bodies.

  17. Formation Flying and Deformable Instruments

    NASA Astrophysics Data System (ADS)

    Rio, Yvon

    2009-05-01

    Astronomers have always attempted to build very stable instruments. They fight all that can cause mechanical deformation or image motion. This has led to well established technologies (autoguide, active optics, thermal control, tip/tilt correction), as well as observing methods based on the use of controlled motion (scanning, micro scanning, shift and add, chopping and nodding). Formation flying disturbs this practice. It is neither possible to reduce the relative motion to very small amplitudes, nor to control it at will. Some impacts on Simbol-X instrument design, and operation are presented.

  18. Formation Flying and Deformable Instruments

    SciTech Connect

    Rio, Yvon

    2009-05-11

    Astronomers have always attempted to build very stable instruments. They fight all that can cause mechanical deformation or image motion. This has led to well established technologies (autoguide, active optics, thermal control, tip/tilt correction), as well as observing methods based on the use of controlled motion (scanning, micro scanning, shift and add, chopping and nodding). Formation flying disturbs this practice. It is neither possible to reduce the relative motion to very small amplitudes, nor to control it at will. Some impacts on Simbol-X instrument design, and operation are presented.

  19. Dissipation in deforming chaotic billiards

    NASA Astrophysics Data System (ADS)

    Barnett, Alexander Harvey

    Chaotic billiards (hard-walled cavities) in two or more dimensions are paradigm systems in the fields of classical and quantum chaos. We study the dissipation (irreversible heating) rate in such billiard systems due to general shape deformations which are periodic in time. We are motivated by older studies of one-body nuclear dissipation and by anticipated mesoscopic applications. We review the classical and quantum linear response theories of dissipation rate and demonstrate their correspondence in the semiclassical limit. In both pictures, heating is a result of stochastic energy spreading. The heating rate can be expressed as a frequency-dependent friction coefficient μ(ω), which depends on billiard shape and deformation choice. We show that there is a special class of deformations for which μ vanishes as like a power law in the small- ω limit. Namely, for deformations which cause translations and dilations μ ~ ω4 whereas for those which cause rotations μ ~ ω2. This contrasts the generic case for which μ ~ ω4 We show how a systematic treatment of this special class leads to an improved version of the `wall formula' estimate for μ(0). We show that the special nature of dilation (a new result) is semiclassically equivalent to a quasi- orthogonality relation between the (undeformed) billiard quantum eigenstates on the boundary. This quasi- orthogonality forms the heart of a `scaling method' for the numerical calculation of quantum eigenstates, invented recently by Vergini and Saraceno. The scaling method is orders of magnitude more efficient than any other known billiard quantization method, however an adequate explanation for its success has been lacking until now. We explain the scaling method, its errors, and applications. We also present improvements to Heller's plane wave method. Two smaller projects conclude the thesis. Firstly, we give a new formalism for quantum point contact (QPC) conductance in terms of scattering cross-section in the half

  20. Deformational characteristics of thermoplastic elastomers

    NASA Astrophysics Data System (ADS)

    Indukuri, Kishore K.

    This thesis focuses primarily on the structure-property relationships of poly (styrene-ethylene-butylene-styrene) triblock copolymer TPEs. First evidence for strain-induced crystallization occurring in certain SEBS block copolymers has been established using unique techniques like deformation calorimetry, combined in-situ small angle X-ray and wide angle X-ray diffraction (SAXD/WAXD). Also the ramifications of such strain-induced crystallization on the mechanical properties like cyclic hysteresis, stress relaxation/creep retention of these SEBS systems have been studied. In addition, the structural changes in the morphology of these systems on deformation have been investigated using combined SAXD/WAXD setup. Small angle X-ray diffraction probed the changes at the nano-scale of polystyrene (PS) cylinders, while wide angle X-ray diffraction probed the changes at molecular length scales of the amorphous/crystalline domains of the elastomeric mid-block in these systems. New structural features at both these length scales have been observed and incorporated into the overall deformation mechanisms of the material. Continuous processing techniques like extrusion have been used to obtain ultra long-range order and orientation in these SEBS systems. Thus well ordered crystal like hexagonal packing of cylinders, where in each element in this hexagonal lattice can be individually addressed without any grain boundaries can be realized using these robust techniques. The effect of long-range order/orientation on the mechanical properties has been studied. In addition, these well ordered systems serve as model systems for evaluating deformation mechanisms of these SEBS systems, where the relative contributions of each of the phases can be estimated. EPDM/i-PP thermoplastic vulcanizates (TPVs) have micron size scale phase separated morphologies of EPDM rubber dispersed in a semicrystalline i-PP matrix as a result of the dynamic vulcanization process. Confocal microscopy studies

  1. Tectonic deformation in southern California

    NASA Technical Reports Server (NTRS)

    Jackson, David D.

    1993-01-01

    Our objectives were to use modem geodetic data, especially those derived from space techniques like Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), and the Global Positioning System (GPS) to infer crustal deformation in southern California and relate it to plate tectonics and earthquake hazard. To do this, we needed to collect some original data, write computer programs to determine positions of survey markers from geodetic observables, interpret time dependent positions in terms of velocity and earthquake caused episodic displacements, and construct a model to explain these velocities and displacements in terms of fault slip and plate movements.

  2. Deformable Mirrors Correct Optical Distortions

    NASA Technical Reports Server (NTRS)

    2010-01-01

    By combining the high sensitivity of space telescopes with revolutionary imaging technologies consisting primarily of adaptive optics, the Terrestrial Planet Finder is slated to have imaging power 100 times greater than the Hubble Space Telescope. To this end, Boston Micromachines Corporation, of Cambridge, Massachusetts, received Small Business Innovation Research (SBIR) contracts from the Jet Propulsion Laboratory for space-based adaptive optical technology. The work resulted in a microelectromechanical systems (MEMS) deformable mirror (DM) called the Kilo-DM. The company now offers a full line of MEMS DMs, which are being used in observatories across the world, in laser communication, and microscopy.

  3. 31 CFR 561.301 - Effective date.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... with respect to Iran's Islamic Revolutionary Guard Corps and any of its agents or affiliates whose... date of the prohibition contained in § 561.202 with respect to an agent or affiliate of Iran's...

  4. Coconut, date and oil palm genomics

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A review of genomics research is presented for the three most economically important palm crops, coconut (Cocos nucifera), date palm (Phoenix dactylifera) and oil palm (Elaeis guineensis), encompassing molecular markers studies of genetic diversity, genetic mapping, quantitative trait loci discovery...

  5. 28 CFR 36.508 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... ACCOMMODATIONS AND IN COMMERCIAL FACILITIES Enforcement § 36.508 Effective date. (a) General. Except as otherwise...,000 or less. (c) Transportation services provided by public accommodations. Newly purchased or...

  6. 40 CFR 469.11 - Compliance dates.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... § 469.11 Compliance dates. The compliance deadline for the BAT fluoride limitation shall be as soon as... for the BAT and BCT limitations for total toxic organics (TTO) and pH, respectively, is as soon...

  7. 40 CFR 469.11 - Compliance dates.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... § 469.11 Compliance dates. The compliance deadline for the BAT fluoride limitation shall be as soon as... for the BAT and BCT limitations for total toxic organics (TTO) and pH, respectively, is as soon...

  8. 40 CFR 469.11 - Compliance dates.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Compliance dates. The compliance deadline for the BAT fluoride limitation shall be as soon as possible as... BCT limitations for total toxic organics (TTO) and pH, respectively, is as soon as possible...

  9. 40 CFR 469.11 - Compliance dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... § 469.11 Compliance dates. The compliance deadline for the BAT fluoride limitation shall be as soon as... for the BAT and BCT limitations for total toxic organics (TTO) and pH, respectively, is as soon...

  10. 29 CFR 4007.11 - Due dates.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... is the fifteenth day of the fourteenth calendar month that begins on or after the first day of that... specified in paragraph (a) of this section, or (2) 30 days after the date on which the amendment...

  11. 31 CFR 561.301 - Effective date.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... with respect to Iran's Islamic Revolutionary Guard Corps and any of its agents or affiliates whose... date of the prohibition contained in § 561.202 with respect to an agent or affiliate of Iran's...

  12. 31 CFR 561.301 - Effective date.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... with respect to Iran's Islamic Revolutionary Guard Corps and any of its agents or affiliates whose... date of the prohibition contained in § 561.202 with respect to an agent or affiliate of Iran's...

  13. When To Let Your Teenager Start Dating

    MedlinePlus

    ... Are other parents letting their teens date yet? Love and Relationships While parent-teen conversations must encompass ... both deserve the best, right?” Call It Puppy Love, It’s Still Love Adults generally take a cynical ...

  14. 16 CFR 1211.1 - Effective date.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... STANDARD FOR AUTOMATIC RESIDENTIAL GARAGE DOOR OPERATORS The Standard § 1211.1 Effective date. This standard applies to all residential garage door operators manufactured on or after January 1, 1993 for...

  15. 16 CFR 1211.1 - Effective date.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... STANDARD FOR AUTOMATIC RESIDENTIAL GARAGE DOOR OPERATORS The Standard § 1211.1 Effective date. This standard applies to all residential garage door operators manufactured on or after January 1, 1993 for...

  16. 50 CFR 218.231 - Effective dates.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... and Importing of Marine Mammals; Navy Operations of Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Sonar § 218.231 Effective dates. Regulations are effective August 15,...

  17. 50 CFR 218.231 - Effective dates.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... and Importing of Marine Mammals; Navy Operations of Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Sonar § 218.231 Effective dates. Regulations are effective August 15,...

  18. 50 CFR 218.231 - Effective dates.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... and Importing of Marine Mammals; Navy Operations of Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Sonar § 218.231 Effective dates. Regulations are effective August 15,...

  19. 40 CFR 63.1351 - Compliance dates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... compliance date for an existing source to meet the requirements of GCP for THC is December 20, 2007. (d) The..., 2006 to meet the THC emission limit of 20 ppmv/98 percent reduction or the mercury standard of 41...

  20. Radioactive Dating: A Method for Geochronology.

    ERIC Educational Resources Information Center

    Rowe, M. W.

    1985-01-01

    Gives historical background on the discovery of natural radiation and discusses various techniques for using knowledge of radiochemistry in geochronological studies. Indicates that of these radioactive techniques, Potassium-40/Argon-40 dating is used most often. (JN)