Sample records for karputkin raimund ubar
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Space Radar Image of Ubar Optical/Radar
1998-04-28
This pair of images from space shows a portion of the southern Empty Quarter of the Arabian Peninsula in the country of Oman. On the left is a radar image of the region around the site of the fabled Lost City of Ubar, discovered in 1992 with the aid of remote sensing data. On the right is an enhanced optical image taken by the shuttle astronauts. Ubar existed from about 2800 BC to about 300 AD. and was a remote desert outpost where caravans were assembled for the transport of frankincense across the desert. The actual site of the fortress of the Lost City of Ubar, currently under excavation, is too small to show in either image. However, tracks leading to the site, and surrounding tracks, show as prominent, but diffuse, reddish streaks in the radar image. Although used in modern times, field investigations show many of these tracks were in use in ancient times as well. Mapping of these tracks on regional remote sensing images provided by the Landsat satellite was a key to recognizing the site as Ubar. The prominent magenta colored area is a region of large sand dunes. The green areas are limestone rocks, which form a rocky desert floor. A major wadi, or dry stream bed, runs across the scene and appears as a white line. The radar images, and ongoing field investigations, will help shed light on an early civilization about which little in known. The radar image was taken by the Spaceborne Imaging Radar C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) and is centered at 18 degrees North latitude and 53 degrees East longitude. The image covers an area about 50 kilometers by 100 kilometers (31 miles by 62 miles). The colors in the image are assigned to different frequencies and polarizations of the radar as follows: red is L-band, horizontally transmitted, horizontally received; blue is C-band horizontally transmitted, horizontally received; green is L-band horizontally transmitted, vertically received. SIR-C/X-SAR, a joint mission of the German, Italian and the United
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Space Radar Image of the Lost City of Ubar
1999-01-27
This is a radar image of the region around the site of the lost city of Ubar in southern Oman, on the Arabian Peninsula. The ancient city was discovered in 1992 with the aid of remote sensing data. Archeologists believe Ubar existed from about 2800 B.C. to about 300 A.D. and was a remote desert outpost where caravans were assembled for the transport of frankincense across the desert. This image was acquired on orbit 65 of space shuttle Endeavour on April 13, 1994 by the Spaceborne Imaging Radar C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR). The SIR-C image shown is centered at 18.4 degrees north latitude and 53.6 degrees east longitude. The image covers an area about 50 by 100 kilometers (31 miles by 62 miles). The image is constructed from three of the available SIR-C channels and displays L-band, HH (horizontal transmit and receive) data as red, C-band HH as blue, and L-band HV (horizontal transmit, vertical receive) as green. The prominent magenta colored area is a region of large sand dunes, which are bright reflectors at both L-and C-band. The prominent green areas (L-HV) are rough limestone rocks, which form a rocky desert floor. A major wadi, or dry stream bed, runs across the middle of the image and is shown largely in white due to strong radar scattering in all channels displayed (L and C HH, L-HV). The actual site of the fortress of the lost city of Ubar, currently under excavation, is near the Wadi close to the center of the image. The fortress is too small to be detected in this image. However, tracks leading to the site, and surrounding tracks, appear as prominent, but diffuse, reddish streaks. These tracks have been used in modern times, but field investigations show many of these tracks were in use in ancient times as well. Mapping of these tracks on regional remote sensing images was a key to recognizing the site as Ubar in 1992. This image, and ongoing field investigations, will help shed light on a little known early civilization. http
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Space Radar Image of the Lost City of Ubar
NASA Technical Reports Server (NTRS)
1999-01-01
This is a radar image of the region around the site of the lost city of Ubar in southern Oman, on the Arabian Peninsula. The ancient city was discovered in 1992 with the aid of remote sensing data. Archeologists believe Ubar existed from about 2800 B.C. to about 300 A.D. and was a remote desert outpost where caravans were assembled for the transport of frankincense across the desert. This image was acquired on orbit 65 of space shuttle Endeavour on April 13, 1994 by the Spaceborne Imaging Radar C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR). The SIR-C image shown is centered at 18.4 degrees north latitude and 53.6 degrees east longitude. The image covers an area about 50 by 100 kilometers (31 miles by 62 miles). The image is constructed from three of the available SIR-C channels and displays L-band, HH (horizontal transmit and receive) data as red, C-band HH as blue, and L-band HV (horizontal transmit, vertical receive) as green. The prominent magenta colored area is a region of large sand dunes, which are bright reflectors at both L-and C-band. The prominent green areas (L-HV) are rough limestone rocks, which form a rocky desert floor. A major wadi, or dry stream bed, runs across the middle of the image and is shown largely in white due to strong radar scattering in all channels displayed (L and C HH, L-HV). The actual site of the fortress of the lost city of Ubar, currently under excavation, is near the Wadi close to the center of the image. The fortress is too small to be detected in this image. However, tracks leading to the site, and surrounding tracks, appear as prominent, but diffuse, reddish streaks. These tracks have been used in modern times, but field investigations show many of these tracks were in use in ancient times as well. Mapping of these tracks on regional remote sensing images was a key to recognizing the site as Ubar in 1992. This image, and ongoing field investigations, will help shed light on a little known early civilization. Spaceborne
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Shear bond strength comparison of implant-retained overdenture attachment pickup materials.
Cayouette, Monica J; Barnes, Logan; Vuthiganon, Jompobe; McPherson, Karen
2016-01-01
This study evaluated the shear bond strength (SBS) of 4 different retentive materials for the chairside pickup of dental implant attachments. Shear force was applied to determine the SBS of each material to denture acrylic resin. The difference between SBSs of polymethyl methacrylate and UBAR (claimed to bond to metal) to metal housings was also evaluated. There were no statistically significant differences among the SBSs of Jet Denture Repair Acrylic, EZ PickUp, and UBAR, but Quick Up had an SBS that was significantly lower than that of the other 3 materials. In addition, UBAR had a higher SBS to metal housings than did processed polymethyl methacrylate.
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NASA Technical Reports Server (NTRS)
1993-01-01
Nicholas Clapp, a filmmaker and archeology enthusiast, had accumulated extensive information concerning Ubar, the fabled lost city of ancient Arabia. When he was unable to identify its exact location, however, he turned to the Jet Propulsion Laboratory (JPL) for assistance in applying orbital remote sensing techniques. JPL scientists searched NASA's shuttle imaging radar, as well as Landsat and SPOT images and discovered ancient caravan tracks. This enabled them to prepare a map of the trails, which converged at a place known as Ash Shisr. An expedition was formed, which found structures and artifacts from a city that predates previous area civilization by a thousand years. Although it will take time to validate the city as Ubar, the discovery is a monumental archeological triumph.
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Saturated Reconstruction of a Volume of Neocortex
2015-07-30
Narayanan Kasthuri, Kenneth Jeffrey Hayworth, Daniel Raimund Berger, ..., Carey Eldin Priebe, Hanspeter Pfister, Jeff William Lichtman Correspondence...Sussman,4 Carey Eldin Priebe,5 Hanspeter Pfister,2 and Jeff William Lichtman1,* 1Department of Molecular and Cellular Biology and Center for Brain...redundancies in the synaptic connections andwanted to know if these were acci- dental . For all these reasons, we have attempted to analyze the connectivity
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VizieR Online Data Catalog: Rest frequencies of dithioformic acid (Prudenzano+, 2018)
NASA Astrophysics Data System (ADS)
Prudenzano, D.; Laas, J.; Bizzocchi, L.; Lattanzi, V.; Endres, C.; Giuliano, B. M.; Spezzano, S.; Palumbo, M. E.; Caselli, P.
2018-01-01
The measurements were performed using the CASAC (Center for Astrochemical Studies Absorption Cell) spectrometer at the Max-Planck-Institut fuer extraterrestrische Physik. Full details of the experimental apparatus can be found in Bizzocchi et al. (2017A&A...602A..34B). The instrument employs the frequency modulation technique in the mm and submm range and is equipped with a glow discharge cell for production of unstable species. Measurements were carried out at room temperature to avoid condensation of the precursors. Dithioformic acid was produced by a 40mA DC discharge (~0.8kV) from a 1:1 mixture of CS2 and H2, diluted in Ar buffer gas. The total pressure in the cell was 20-30mTorr (27-40ubar). (4 data files).
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Baryon masses and σ terms in SU(3) BChPT×1/N c
Fernando, Ishara P.; Alarcon-Soriano, Jose-Manuel; Goity, Jose Luis
2018-04-27
Baryon masses and nucleonmore » $$\\sigma$$ terms are studied with the effective theory that combines the chiral and $$1/N_c$$ expansions for three flavors. In particular the connection between the deviation of the Gell-Mann-Okubo relation and the $$\\sigma$$ term associated with the scalar density $$\\bar u u+\\bar d d-2\\bar s s$$ is emphasized. The latter is at lowest order related to a mass combination whose low value has given rise to a $$\\sigma$$ term puzzle. It is shown that while the nucleon $$\\sigma$$ terms have a well behaved low energy expansion, that mass combination is affected by large higher order corrections non-analytic in quark masses. Lastly, adding to the analysis lattice QCD baryon masses, it is found that $$\\sigma_{\\pi N}=69(10)$$~MeV and $$\\sigma_s$$ has natural magnitude within its relative large uncertainty.« less
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Baryon masses and σ terms in SU(3) BChPT×1/N c
DOE Office of Scientific and Technical Information (OSTI.GOV)
Fernando, Ishara P.; Alarcon-Soriano, Jose-Manuel; Goity, Jose Luis
Baryon masses and nucleonmore » $$\\sigma$$ terms are studied with the effective theory that combines the chiral and $$1/N_c$$ expansions for three flavors. In particular the connection between the deviation of the Gell-Mann-Okubo relation and the $$\\sigma$$ term associated with the scalar density $$\\bar u u+\\bar d d-2\\bar s s$$ is emphasized. The latter is at lowest order related to a mass combination whose low value has given rise to a $$\\sigma$$ term puzzle. It is shown that while the nucleon $$\\sigma$$ terms have a well behaved low energy expansion, that mass combination is affected by large higher order corrections non-analytic in quark masses. Lastly, adding to the analysis lattice QCD baryon masses, it is found that $$\\sigma_{\\pi N}=69(10)$$~MeV and $$\\sigma_s$$ has natural magnitude within its relative large uncertainty.« less
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QCD tests with SLD and polarized beams
DOE Office of Scientific and Technical Information (OSTI.GOV)
Strauss, M.G.
1994-12-01
The author presents a measurement of the strong coupling {alpha}{sub s} derived from multijet rates using data collected by the SLD experiment at SLAC and find that {alpha}{sub s}(M{sub Z}{sup 2}) = 0.118 {+-} 0.002(stat.) {+-} 0.003(syst.) {+-} 0.010(theory). He presents tests of the flavor independence of strong interactions via preliminary measurements of the ratios {alpha}{sub s}(b)/{alpha}{sub s}(udsc) and {alpha}{sub s}(uds)/{alpha}{sub s}(bc). In addition, the group has measured the difference in charged particle multiplicity between Z{sup 0} {yields} b{bar b} and Z{sup 0} {yields} u{bar u}, d{bar d}, s{bar s} events, and find that it supports the prediction of perturbativemore » QCD that the multiplicity difference be independent of center-of-mass energy. Finally, the group has made a preliminary study of jet polarization using the jet handedness technique.« less
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NASA Technical Reports Server (NTRS)
Wheeler, R. M.; Mackowiak, C. L.; Sager, J. C.
1990-01-01
Soybean plants were grown for 90 days at 500, 1000, 2000, and 5000 ubar (ppm) carbon dioxide (CO2) and compared for proximate nutritional value. For both cultivars (MC and PX), seed protein levels were highest at 1000 (39.3 and 41.9 percent for MC and PX) and lowest at 2000 (34.7 and 38.9 percent for MC and PX). Seed fat (oil) levels were highest at 2000 (21.2 and 20.9 percent for MC and PX) and lowest at 5000 (13.6 and 16.6 percent for MC and PX). Seed carbohydrate levels were highest at 500 (31.5 and 28.4 percent for MC and PX) and lowest at 2000 (20.9 and 20.8 percent for MC and PX). When adjusted for total seed yield per unit growing area, the highest production of protein and carbohydrate occurred with MC at 1000, while equally high amounts of fat were produced with MC at 1000 and 2000. Seed set and pod development at 2000 were delayed in comparison to other CO2 treatments; thus the proportionately high fat and low protein at 2000 may have been a result of the delay in plant maturity rather than CO2 concentration. Stem crude fiber and carbohydrate levels for both cultivars increased with increased CO2. Leaf protein and crude fiber levels also tended to rise with increased CO2 but leaf carbohydrate levels decreased as CO2 was increased. The results suggest that CO2 effects on total seed yield out-weighed any potential advantages to changes in seed composition.
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Recent data for the p p at tevatron and odderon description
DOE Office of Scientific and Technical Information (OSTI.GOV)
Fazal-e-Aleem; Ali, M.; Rashid, H.
1991-06-01
The experimental data for pp and {bar p}p at {radical}s = 53 GeV shows the difference between the differential cross sections in the dip region. This prompted the need for a crossing-odd amplitude even at this energy. Further support to this idea was provided by the order of magnitude rise of the measured pp differential cross section in the dip region as we go from ISR to CERN collider energies. In order to overcome the difficulty to explain these phenomena, Gauron et al used the idea of an odderon in addition to the pomeron and explained the then available datamore » for pp and {bar p}p. Dynamical origin to the idea of an odderon was later provided by Islam. He has pointed out that, if the nucleon consists of a core of valence quarks surrounded by a cloud of quark-antiquark pairs, then in elastic scattering an odderon amplitude occurs when the cores interact by exchanging a J = 1, C = {minus}1, u{bar u} + d{bar d} state and the cloud undergoes maximal diffraction scattering. The model has recently been modified by these authors so as to fit the very recent data of {bar p}p at 546 GeV and make predictions at 1.8 TeV. The same idea was also used by Barnbard et al to explain the pp and {bar p}p data , Jankovszky et al have also fitted the data for p ({bar p}) p by employing the odderon in conjunction with the dipole pomeron. In this paper the authors will compare the results of these models with the most recent measurements at tevatron and also compare them with those of other models.« less
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Simões, Inês C M; Costa, Inês P D; Coimbra, João T S; Ramos, Maria J; Fernandes, Pedro A
2017-01-23
Knowing how proteins make stable complexes enables the development of inhibitors to preclude protein-protein (P:P) binding. The identification of the specific interfacial residues that mostly contribute to protein binding, denominated as hot spots, is thus critical. Here, we refine an in silico alanine scanning mutagenesis protocol, based on a residue-dependent dielectric constant version of the Molecular Mechanics/Poisson-Boltzmann Surface Area method. We have used a large data set of structurally diverse P:P complexes to redefine the residue-dependent dielectric constants used in the determination of binding free energies. The accuracy of the method was validated through comparison with experimental data, considering the per-residue P:P binding free energy (ΔΔG binding ) differences upon alanine mutation. Different protocols were tested, i.e., a geometry optimization protocol and three molecular dynamics (MD) protocols: (1) one using explicit water molecules, (2) another with an implicit solvation model, and (3) a third where we have carried out an accelerated MD with explicit water molecules. Using a set of protein dielectric constants (within the range from 1 to 20) we showed that the dielectric constants of 7 for nonpolar and polar residues and 11 for charged residues (and histidine) provide optimal ΔΔG binding predictions. An overall mean unsigned error (MUE) of 1.4 kcal mol -1 relative to the experiment was achieved in 210 mutations only with geometry optimization, which was further reduced with MD simulations (MUE of 1.1 kcal mol -1 for the MD employing explicit solvent). This recalibrated method allows for a better computational identification of hot spots, avoiding expensive and time-consuming experiments or thermodynamic integration/ free energy perturbation/ uBAR calculations, and will hopefully help new drug discovery campaigns in their quest of searching spots of interest for binding small drug-like molecules at P:P interfaces.
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NASA Remote Sensing Applications for Archaeology and Cultural Resources Management
NASA Technical Reports Server (NTRS)
Giardino, Marco J.
2008-01-01
the use of remote sensing. In 2007, NASA awarded six competitively chosen projects in Space Archaeology through an open solicitation whose purpose, among several, was to addresses the potential benefits to modern society that can be derived through a better understanding of how past cultures succeeded or failed to adapt to local, regional, and global change. A further objective of NASA's space archaeology is the protection and preservation of cultural heritage sites while planning for the sustainable development of cultural resources. NASA s archaeological approach through remote sensing builds on traditional methods of aerial archaeology (i.e. crop marks) and utilizes advanced technologies for collecting and analyzing archaeological data from digital imagery. NASA s archaeological research and application projects using remote sensing have been conducted throughout the world. In North America, NASA has imaged prehistoric mound sites in Mississippi; prehistoric shell middens in Louisiana, Puebloan sites in New Mexico and more recently the sites associated with the Lewis and Clark Corps of Discovery Expedition (1804-1806). In Central America, NASA archaeologists have researched Mayan sites throughout the region, including the Yucatan and Costa Rica, as well as Olmec localities in Veracruz. Other data has been collected over Angkor, Cambodia, Giza in Egypt, the lost city of Ubar on the Arabian Peninsula.
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NASA Astrophysics Data System (ADS)
Albrecht, Tim; Edel, Joshua B.; Winterhalter, Mathias
2010-11-01
, Di Cao and Stuart Lindsay Probing DNA with micro- and nanocapillaries and optical tweezers L J Steinbock, O Otto, D R Skarstam, S Jahn, C Chimerel, J L Gornall and U F Keyser Fabrication of nanopores with embedded annular electrodes and transverse carbon nanotube electrodes Zhijun Jiang, Mirna Mihovilovic, Jason Chan and Derek Stein Fabrication and electrical characterization of a pore-cavity-pore device D Pedone, M Langecker, A M Münzer, R Wei, R D Nagel and U Rant Use of tunable nanopore blockade rates to investigate colloidal dispersions G R Willmott, R Vogel, S S C Yu, L G Groenewegen, G S Roberts, D Kozak, W Anderson and M Trau Facilitated translocation of polypeptides through a single nanopore Robert Bikwemu, Aaron J Wolfe, Xiangjun Xing and Liviu Movileanu Mechanistic insight into gramicidin-based detection of protein-ligand interactions via sensitized photoinactivation Tatyana I Rokitskaya, Michael X Macrae, Steven Blake, Natalya S Egorova, Elena A Kotova, Jerry Yang and Yuri N Antonenko Sequence-dependent unfolding kinetics of DNA hairpins studied by nanopore force spectroscopy Stephan Renner, Andrey Bessonov, Ulrich Gerland and Friedrich C Simmel Hydration properties of mechanosensitive channel pores define the energetics of gating A Anishkin, B Akitake, K Kamaraju, C-S Chiang and S Sukharev Dynamic translocation of ligand-complexed DNA through solid-state nanopores with optical tweezers Andy Sischka, Andre Spiering, Maryam Khaksar, Miriam Laxa, Janine König, Karl-Josef Dietz and Dario Anselmetti Force fluctuations assist nanopore unzipping of DNA V Viasnoff, N Chiaruttini, J Muzard and U Bockelmann Control and reversal of the electrophoretic force on DNA in a charged nanopore Binquan Luan and Aleksei Aksimentiev The properties of the outer membrane localized Lipid A transporter LptD Raimund Haarmann, Mohamed Ibrahim, Mara Stevanovic, Rolf Bredemeier and Enrico Schleiff Structural and dynamical properties of the porins OmpF and OmpC: insights from