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Sample records for holmstrm karin jrverud

  1. 832 Karin: Absence of rotational spectral variations

    NASA Astrophysics Data System (ADS)

    Vernazza, Pierre; Rossi, Alessandro; Birlan, Mirel; Fulchignoni, Marcello; Nedelcu, Alin; Dotto, Elisabetta

    2007-11-01

    832 Karin is the largest member of the young Karin cluster that formed 5.75±0.05 Myr ago in the outer main belt. Surprisingly, recent near-IR spectroscopy measurements [Sasaki, T., Sasaki, S., Watanabe, J., Sekiguchi, T., Yoshida, F., Kawakita, H., Fuse, T., Takato, N., Dermawan, B., Ito, T., 2004. Astrophys. J. 615 (2), L161-L164] revealed that Karin's surface shows different colors as a function of rotational phase. It was interpreted that 832 Karin shows us the reddish space-weathered exterior surface of the parent body as well as an interior face, which has not had time to become space-weathered. This result is at odds with recent results including seismic and geomorphic modeling, modeling of the Karin cluster formation and measurements of the space weathering rate. Consequently, we aimed to confirm/infirm this surprising result by sampling Karin's spectrum well throughout its rotation. Here, we present new visible (0.45-0.95 μm) and near-infrared (0.7-2.5 μm) spectroscopic observations of 832 Karin obtained in January and April 2006, covering most of Karin's longitudes. In the visible range, we find that Karin shows no rotational spectral variations. Similarly, we find that Karin exhibits very little (to none) spectral variations with rotation in the near-IR range. Our results imply that 832 Karin has a homogeneous surface, in terms of composition and surface age. Our results also imply that the impact that generated the family refreshed entirely Karin's surface, and probably the surfaces of all members.

  2. Mature and Fresh Surfaces on New-Born Asteroid Karin

    NASA Astrophysics Data System (ADS)

    Sasaki, S.; Sasaki, T.; Watanabe, J.; Sekiguchi, T.; Yoshida, F.; Ito, T.; Kawakita, H.; Fuse, T.; Takato, N.; Dermawan, B.

    2004-11-01

    We report a near-infrared (J, H, and K bands) spectroscopy of the brightest asteroid 832 Karin among the Karin cluster group, which was formed by collisional breakup only 5.8 million years ago. The spectroscopic observation was performed by the Subaru telescope with Cooled Infrared Spectrograph and Camera for OHS (CISCO) on 2003 September 14. To obtain a wide range spectrum, grisms named zJ (0.88-1.40 micron), JH (1.06-1.82 micron), and wK (1.85-2.51 micron) were used. We obtained 3 sets of spectra corresponding to the rotational phase 0.30-0.34, 0.35-0.38, and 0.45-0.50 in comparison with lightcurve observations. Near infrared (0.9-1.4micron) reflectance slope of the 1st set was twice as steep as that of later spectra. The range, where the most significant spectral change was detected, was observed both by zJ and JH bands. Gradual change of the spectral slope is detected through zJ(1st) - JH(1st) - zJ(2nd) - JH(2nd) data . We verified that spectra of a reference star SAO165395 (zJ) were not changed before the 1st set and after the 2nd set of Karin observation, which should remove the possibility that the spectral change was caused by instrumental or atmospheric (and hour angle) effect through the observation of the 1st set and the 2nd set of Karin. For different rotational phases of Karin, we derived different spectra such as a reddened spectrum like that of S-type asteroid and an un-reddened spectrum like that of ordinary chondrite. Karin would be an impact fragment which not only has new surface but also preserves old surface. Probably it would be one of cone-shaped fragments at low-velocity impact forming Karin cluster group. Our result supports the idea that S-type asteroids are parent bodies of ordinary chondrites.

  3. Detection of the YORP Effect for Small Asteroids in the Karin Cluster

    NASA Astrophysics Data System (ADS)

    Carruba, V.; Nesvorný, D.; Vokrouhlický, D.

    2016-06-01

    The Karin cluster is a young asteroid family thought to have formed only ≃ 5.75 Myr ago. The young age can be demonstrated by numerically integrating the orbits of Karin cluster members backward in time and showing the convergence of the perihelion and nodal longitudes (as well as other orbital elements). Previous work has pointed out that the convergence is not ideal if the backward integration only accounts for the gravitational perturbations from the solar system planets. It improves when the thermal radiation force known as the Yarkovsky effect is accounted for. This argument can be used to estimate the spin obliquities of the Karin cluster members. Here we take advantage of the fast growing membership of the Karin cluster and show that the obliquity distribution of diameter D≃ 1{--}2 km Karin asteroids is bimodal, as expected if the YORP effect acted to move obliquities toward extreme values (0° or 180°). The measured magnitude of the effect is consistent with the standard YORP model. The surface thermal conductivity is inferred to be 0.07-0.2 W m-1 K-1 (thermal inertia ≃ 300{--}500 J m-2 K-1 s{}-1/2). We find that the strength of the YORP effect is roughly ≃ 0.7 of the nominal strength obtained for a collection of random Gaussian spheroids. These results are consistent with a surface composed of rough, rocky regolith. The obliquity values predicted here for 480 members of the Karin cluster can be validated by the light-curve inversion method.

  4. Detection of the YORP effect for small asteroids in the Karin family

    NASA Astrophysics Data System (ADS)

    Nesvorny, David; Carruba, Valerio; Vokrouhlicky, David

    2016-10-01

    The Karin family formed by a collisional breakup of a ~40-km parent asteroid only 5.75 Myr ago. The young age can be demonstrated by numerically integrating the orbits of Karin family members backward in time and showing the convergence of orbital elements. Previous work has pointed out that the convergence is not ideal if the backward integration only accounts for the gravitational perturbations from the Solar System planets. It improves when the thermal radiation force known as the Yarkovsky effect is accounted for. This method can be used to estimate the spin obliquities of Karin family members. Here we show that the obliquity distribution of diameter D=1-2 km asteroids in the Karin family is bimodal, as expected if the YORP effect acted to move obliquities toward extreme values (0 or 180 deg). The measured magnitude of the effect is consistent with the standard YORP model. Specifically, the strength of the YORP effect is inferred to be roughly 70% of the nominal YORP strength obtained for a collection of random Gaussian spheroids. The surface thermal conductivity is found to be 0.07-0.2 W/m/K (thermal inertia 300-500 in the SI units). These results are consistent with surfaces composed of rough and rocky regolith. The obliquity values predicted here for 480 members of the Karin cluster can be validated by the lightcurve inversion method. In broader context, the bimodal distribution of obliquities in the Karin cluster can be thought as an initial stage of dynamical evolution that later leads to a characteristically bi-lobed distribution of family members in the semimajor axis (e.g., Eos, Merxia or Erigone families).

  5. Testing the Deployment Repeatability of a Precision Deployable Boom Prototype for the Proposed SWOT Karin Instrument

    NASA Technical Reports Server (NTRS)

    Agnes, Gregory S.; Waldman, Jeff; Hughes, Richard; Peterson, Lee D.

    2015-01-01

    NASA's proposed Surface Water Ocean Topography (SWOT) mission, scheduled to launch in 2020, would provide critical information about Earth's oceans, ocean circulation, fresh water storage, and river discharge. The mission concept calls for a dual-antenna Ka-band radar interferometer instrument, known as KaRIn, that would map the height of water globally along two 50 km wide swaths. The KaRIn antennas, which would be separated by 10 meters on either side of the spacecraft, would need to be precisely deployable in order to meet demanding pointing requirements. Consequently, an effort was undertaken to design build and prototype a precision deployable Mast for the KaRIn instrument. Each mast was 4.5-m long with a required dilitation stability of 2.5 microns over 3 minutes. It required a minimum first mode of 7 Hz. Deployment repeatability was less than +/- 7 arcsec in all three rotation directions. Overall mass could not exceed 41.5 Kg including any actuators and thermal blanketing. This set of requirements meant the boom had to be three times lighter and two orders of magnitude more precise than the existing state of the art for deployable booms.

  6. A spectral model for irradiated silicates: application to asteroid 832 Karin

    NASA Astrophysics Data System (ADS)

    Brunetto, R.; Vernazza, P.; Marchi, S.; Birlan, M.; Fulchignoni, M.; Orofino, V.; Strazzulla, G.

    We define a new approach to space weathering of airless bodies, and include its effect in the Shkuratov model. We start from recent results of ion irradiation experiments (60-400 keV) of meteorites and silicates; we find that the reddening and darkening process (in the range 0.3-2.5 microns) mainly affects the continuum of reflectance spectra (parameterized by a Cs coefficient), but it does not significantly affect the position or relative intensities of the mafic silicate absorption features. The Cs coefficient is strongly related with the number of displacements per unit area (damage parameter); we consequently obtain an exposure time curve, and corresponding astrophysical timescales. We apply this new description of space weathering to model observed spectra of asteroid 832 Karin, in the 0.4-2.4 microns spectral region. The obtained exposure time is slightly lower than the age of the impact and collisional breakup which originated the Karin asteroidal family, i.e. about 5.75 My.

  7. Onboard Interferometric SAR Processor for the Ka-Band Radar Interferometer (KaRIn)

    NASA Technical Reports Server (NTRS)

    Esteban-Fernandez, Daniel; Rodriquez, Ernesto; Peral, Eva; Clark, Duane I.; Wu, Xiaoqing

    2011-01-01

    An interferometric synthetic aperture radar (SAR) onboard processor concept and algorithm has been developed for the Ka-band radar interferometer (KaRIn) instrument on the Surface and Ocean Topography (SWOT) mission. This is a mission- critical subsystem that will perform interferometric SAR processing and multi-look averaging over the oceans to decrease the data rate by three orders of magnitude, and therefore enable the downlink of the radar data to the ground. The onboard processor performs demodulation, range compression, coregistration, and re-sampling, and forms nine azimuth squinted beams. For each of them, an interferogram is generated, including common-band spectral filtering to improve correlation, followed by averaging to the final 1 1-km ground resolution pixel. The onboard processor has been prototyped on a custom FPGA-based cPCI board, which will be part of the radar s digital subsystem. The level of complexity of this technology, dictated by the implementation of interferometric SAR processing at high resolution, the extremely tight level of accuracy required, and its implementation on FPGAs are unprecedented at the time of this reporting for an onboard processor for flight applications.

  8. KaRIN: an Instrument for Measuring High-Resolution Sea-Surface Topography and Fresh Water Extent, Stage, and Slope

    NASA Astrophysics Data System (ADS)

    Rodriguez, E.; Moller, D.; Enjolras, V.

    2006-12-01

    Traditional nadir profiling altimeters, such as Topex, Jason, or IceSat, are incaple of fully sampling the space- time signatures of both ocean mesoscale and submesoscale phenomena and changes in river discharge. To overcome this limitation, we present an instrument concept, the Ka-band Radar Interferometer (KaRIN), which is able to provide the appropriate space-time sampling to sample these phenomena with a height and slope accuracy suitable to resolve topographic signatures for both ocean and land hydrology applications. Although ocean and hydrlogic applications are quite different, the required sampling characteristics are similar. Both applications require global coverage up to high latitudes (78deg). Measurement of ocean mesoscale and submesoscale phenomena requires a temporal revisit time on the order of 10 days and a height accuracy of about 2cm over a spatial scale of 2km. The sampling of river discharge requires an approximately weekly revisit time, an ability to image water bodies (to determine extent) with a spatial resolution of 100m, a height accuracy better than 10cm and a slope accuracy of 1cm/1km, after averaging over a river area equivalent to 1km x 1km. The similarity in measurement requirements allows for the possibility of meeting both ocean and hydrology requirements with a single instrument. The KaRIN instrument builds on the interferometric SAR concept demonstrated by the NASA Shuttle Radar Topography Mission (SRTM), and the Wide-Swath Ocean Altimeter concept, which was studied by NASA as a potential complement to the Ocean Surface Topography Mission (OSTM). Two major modifications are made to these systems to achieve the desired performance: the spatial sampling requirement implies that full synthetic aperture must be used. Second, achieving the desired height and slope accuracy with a realizable spaceborne instrument requires using a Ka-band (0.8 cm wavelength) radar at near nadir incidence. To validate the science performance of the

  9. KARIN: The Ka-Band Radar Interferometer for the Proposed Surface Water and Ocean Topography (SWOT) Mission

    NASA Technical Reports Server (NTRS)

    Esteban-Fernandez, Daniel; Peral, Eva; McWatters, Dalia; Pollard, Brian; Rodriguez, Ernesto; Hughes, Richard

    2013-01-01

    Over the last two decades, several nadir profiling radar altimeters have provided our first global look at the ocean basin-scale circulation and the ocean mesoscale at wavelengths longer than 100 km. Due to sampling limitations, nadir altimetry is unable to resolve the small wavelength ocean mesoscale and sub-mesoscale that are responsible for the vertical mixing of ocean heat and gases and the dissipation of kinetic energy from large to small scales. The proposed Surface Water and Ocean Topography (SWOT) mission would be a partnership between NASA, CNES (Centre National d'Etudes Spaciales) and the Canadian Space Agency, and would have as one of its main goals the measurement of ocean topography with kilometer-scale spatial resolution and centimeter scale accuracy. In this paper, we provide an overview of all ocean error sources that would contribute to the SWOT mission.

  10. KARIN: The Ka-Band Radar Interferometer for the Proposed Surface Water and Ocean Topography (SWOT) Mission

    NASA Technical Reports Server (NTRS)

    Esteban-Fernandez, Daniel; Peral, Eva; McWatters, Dalia; Pollard, Brian; Rodriguez, Ernesto; Hughes, Richard

    2013-01-01

    Over the last two decades, several nadir profiling radar altimeters have provided our first global look at the ocean basin-scale circulation and the ocean mesoscale at wavelengths longer than 100 km. Due to sampling limitations, nadir altimetry is unable to resolve the small wavelength ocean mesoscale and sub-mesoscale that are responsible for the vertical mixing of ocean heat and gases and the dissipation of kinetic energy from large to small scales. The proposed Surface Water and Ocean Topography (SWOT) mission would be a partnership between NASA, CNES (Centre National d'Etudes Spaciales) and the Canadian Space Agency, and would have as one of its main goals the measurement of ocean topography with kilometer-scale spatial resolution and centimeter scale accuracy. In this paper, we provide an overview of all ocean error sources that would contribute to the SWOT mission.

  11. 75 FR 47637 - Prohibited Transaction Exemptions and Grant of Individual Exemptions Involving: 2010-23, D-11500...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-06

    ... FURTHER INFORMATION CONTACT: Ms. Karin Weng of the Department, telephone (202) 693-8557. (This is not a... INFORMATION CONTACT: Ms. Karin Weng of the Department, telephone (202) 693-8557. (This is not a...

  12. Evaluation of Low-Pressure Drop Antimicrobial and Hybrid Air Filters

    DTIC Science & Technology

    2006-09-01

    Pass Bioaerosol Removal Efficiencies of a Room Air Cleaner,” Karin K. Foarde, James T. Hanley, David S. Ensor , Peter Roessler Aerosol Science...Karin K. Foarde, James T. Hanley, Alan C. Veeck ASHRAE Journal 52-58 (2000) “Determine the Efficacy of Antimicrobial Treatments of Fibrous...Air Filters,” Karin K. Foarde, James T. Hanley ASHRAE Transactions: Research 4429 (RP-909): 156–170. “Development of a Method for Measuring Single

  13. Tackling important issues in Europe.

    PubMed

    de Lange, Karin

    2014-06-14

    Forthcoming animal health legislation, antimicrobial resistance and corporate practice were all discussed at the recent general assembly of the Federation of Veterinarians of Europe. Karin de Lange reports.

  14. The Inner Workings of Ovarian Cancer

    SciTech Connect

    Rodland, Karin

    2016-06-29

    New research identifies critical proteins present in the tumors of women with ovarian cancer. Karin Rodland discusses the work led by PNNL and Johns Hopkins researchers, working with collaborators across the nation.

  15. The Inner Workings of Ovarian Cancer

    ScienceCinema

    Rodland, Karin

    2016-11-02

    New research identifies critical proteins present in the tumors of women with ovarian cancer. Karin Rodland discusses the work led by PNNL and Johns Hopkins researchers, working with collaborators across the nation.

  16. 78 FR 45903 - Native American Housing Assistance and Self-Determination Act of 1996: Negotiated Rulemaking...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-30

    .... Annette Bryan, Executive Director, Puyallup Nation Housing Authority, Tacoma, Washington. Heather Cloud, Representative, Ho-Chunk Nation, Black River Falls, Wisconsin. Gary Cooper, Executive Director, Cherokee Nation..., Gardnerville, Nevada. Karin Lee Foster, Legal Counsel, Yakama Nation Housing Authority, Toppenish, Washington...

  17. FVE must continue to be active, says outgoing president.

    PubMed

    de Lange, Karin

    2015-08-01

    Karin de Lange reports from the recent general assembly of the Federation of Veterinarians of Europe, where issues on the agenda included proposed European regulations on animal health and veterinary medicines.

  18. Libraries in Florida: MedlinePlus

    MedlinePlus

    ... this page: https://medlineplus.gov/libraries/florida.html Libraries in Florida To use the sharing features on ... please enable JavaScript. Atlantis JFK Medical Center MEDICAL LIBRARY 5301 S. Congress Ave. Att: Karin H. Pancake Atlantis, ...

  19. Dynamic compensation, parameter identifiability, and equivariances

    PubMed Central

    2017-01-01

    A recent paper by Karin et al. introduced a mathematical notion called dynamical compensation (DC) of biological circuits. DC was shown to play an important role in glucose homeostasis as well as other key physiological regulatory mechanisms. Karin et al. went on to provide a sufficient condition to test whether a given system has the DC property. Here, we show how DC can be formulated in terms of a well-known concept in systems biology, statistics, and control theory—that of parameter structural non-identifiability. Viewing DC as a parameter identification problem enables one to take advantage of powerful theoretical and computational tools to test a system for DC. We obtain as a special case the sufficient criterion discussed by Karin et al. We also draw connections to system equivalence and to the fold-change detection property. PMID:28384175

  20. 78 FR 24226 - Notice of Proposed Information Collection: Comment Request; FHA TOTAL (Technology Open to...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-24

    ... URBAN DEVELOPMENT Notice of Proposed Information Collection: Comment Request; FHA TOTAL (Technology Open... Officer, Department of Housing and Urban Development, 451 7th Street SW., Washington, DC 20410, Room 9120...: Karin B. Hill, Director, Office of Single Family Program Development, Department of Housing and...

  1. Schools That Succeed: How Educators Marshal the Power of Systems for Improvement

    ERIC Educational Resources Information Center

    Chenoweth, Karin

    2017-01-01

    Informed by years of research and on-the-ground reporting, "Schools That Succeed" is Karin Chenoweth's most inspiring and compelling book yet--an essential read for educators who seek to break the stubborn connection between academic achievement and socioeconomic status. Chenoweth draws on her decade-long journey into neighborhood…

  2. 75 FR 38557 - Application Nos. and Proposed Exemptions; D-11489, Morgan Stanley & Co., Incorporated; L-11609...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-02

    ... should state: (1) The name, address, and telephone number of the person making the comment or request... fiduciary who is Independent of Morgan Stanley. 10. The proposed exemption contains a number of safeguards... CONTACT: Ms. Karin Weng of the Department, telephone (202) 693-8557. (This is not a toll-free number...

  3. 75 FR 51979 - Narrow Woven Ribbons with Woven Selvedge from the People's Republic of China: Amended Final...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-24

    ..., published price lists, official import statistics and customs data, and information obtained from interested...: Amended Final Determination of Sales at Less Than Fair Value AGENCY: Import Administration, International... CONTACT: Karine Gziryan, AD/CVD Operations, Office 4, Import Administration, International Trade...

  4. Epistemic Practices and Object Relations in Professional Work

    ERIC Educational Resources Information Center

    Nerland, Monika; Jensen, Karen

    2012-01-01

    Professional practice is embedded in complex dynamics of knowledge that are present within, but reach beyond, local work. Knowledge is generated from a manifold of sources, and further developed and circulated in professional communities as practitioners are confronted with non-routine problems. Drawing on the work of Karin Knorr Cetina and her…

  5. 77 FR 6809 - Center for Scientific Review; Notice of Closed Meetings

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-09

    ...: Jacinta Bronte-Tinkew, Ph.D., Scientific Review Officer, Center for Scientific Review, National Institutes..., CA 94115. Contact Person: Karin F Helmers, Ph.D., Scientific Review Officer, Center for Scientific... Street, San Francisco, CA 94115. Contact Person: Melinda Jenkins, Ph.D., Scientific Review Officer...

  6. Persistent Discourses in Physics Education: Gender Neutrality and the Gendering of Competence

    ERIC Educational Resources Information Center

    Gonsalves, Allison

    2014-01-01

    In her article, Karin Due presents us with a contradiction in physics: the construction of physics as a symbolically masculine discipline alongside a simultaneous discourse of the "gender-neutrality" of the discipline. Due's article makes an important contribution to the study of the gendering of physics practices, particularly in…

  7. The Role of Shared Knowledge in Science: The Failure of the Constructivist Programme in the Sociology of Science.

    ERIC Educational Resources Information Center

    Freudenthal, Gad

    1984-01-01

    Discusses various aspects of contructivism, focusing on the work of Karin Knorr-Cetina. Indicates that an internal critique of Knorr's arguments for the relativist program in the sociology highlights the role of shared knowledge in science and that Knorr's analysis produces new insights concerning the necessity and nature of scientific consensus.…

  8. Astronaut C. Michael Foale is briefed on use of Sky Genie

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Astronaut C. Michael Foale, STS-63 mission specialist, is briefed on the use of Sky Genie device by Karin L. Porter. The device would aid in emergency egress operations aboard a troubled Space Shuttle. Porter, an employee of Rockwell International, helps train astronauts in egress procedures at JSC's Shuttle mockup and integration laboratory.

  9. Targeted Approach to Overcoming Treatment Resistance in Advanced Prostate Cancer

    DTIC Science & Technology

    2013-07-01

    therapy -­‐resistant   prostate   cancer  cells  and  in  combination   therapy  (SOW...treatment resistance in advanced prostate cancer PRINCIPAL INVESTIGATOR: Dr. Karin Scarpinato CONTRACTING ORGANIZATION: Georgia Southern...SUPPLEMENTARY NOTES 14. ABSTRACT The purpose of this project is to determine if rescinnamine is effective against prostate cancer and

  10. Psycholinguistics and Foreign Language Learning. Papers from a Conference (Stockholm, Sweden and Abo, Finland, October 25-26, 1982). Meddelanden fran Stiftelsens for Abo Akademi Forskningsinstitut Nr.86.

    ERIC Educational Resources Information Center

    Ringbom, Hakan, Ed.

    At irregular intervals, beginning in 1977, Swedish-Finnish conferences on contrastive and applied linguistics have been arranged in Stockholm and Turko/Abo. This volume presents most of the papers given at the 1982 conference. Papers include: "Free Recall of Mixed Language Lists. Error Patterns in Bilingual Memory" (Karin Aronsson, Anja Metsola,…

  11. Response to Elwood, M. et al., Comment on: Maternal Exposure to Domestic Hair Cosmetics and Occupational Endocrine Disruptors Is Associated with a Higher Risk of Hypospadias in the Offspring. Int. J. Environ. Res. Public Health 2017, 14, 27.

    PubMed

    Haraux, Elodie; Braun, Karine; Buisson, Philippe; Stéphan-Blanchard, Erwan; Devauchelle, Camille; Ricard, Jannick; Boudailliez, Bernard; Tourneux, Pierre; Gouron, Richard; Chardon, Karen

    2017-09-15

    Dear Editor, Thank you for inviting us to reply to a "Comment" paper to our published paper "Maternal Exposure to Domestic Hair Cosmetics and Occupational Endocrine Disruptors Is Associated with a Higher Risk of Hypospadias in the Offspring" (Authors: Elodie Haraux, Karine Braun, Philippe Buisson, Erwan Stéphan-Blanchard, Jannick Ricard, Camille Devauchelle, Bernard Boudailliez, Pierre Tourneux, Richard Gouron, Karen Chardon).[...].

  12. Astronaut C. Michael Foale is briefed on use of Sky Genie

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Astronaut C. Michael Foale, STS-63 mission specialist, is briefed on the use of Sky Genie device by Karin L. Porter. The device would aid in emergency egress operations aboard a troubled Space Shuttle. Porter, an employee of Rockwell International, helps train astronauts in egress procedures at JSC's Shuttle mockup and integration laboratory.

  13. Persistent Discourses in Physics Education: Gender Neutrality and the Gendering of Competence

    ERIC Educational Resources Information Center

    Gonsalves, Allison

    2014-01-01

    In her article, Karin Due presents us with a contradiction in physics: the construction of physics as a symbolically masculine discipline alongside a simultaneous discourse of the "gender-neutrality" of the discipline. Due's article makes an important contribution to the study of the gendering of physics practices, particularly in…

  14. Field Evaluations of Topical Arthropod Repellents in North, Central, and South America

    DTIC Science & Technology

    2014-09-01

    percent protection when compared to Ultrathon. 982 JOURNAL OF MEDICAL ENTOMOLOGY Vol. 51, no. 5 inces of Toledo , Cayo, and Stann Creek than in the...and Russell King (Ministry of Health, Belize), and Victor López-Sifuentes and Karin Es- cobedo-Vargas (NAMRU-6) for their Þeld assistance and

  15. "Like-Me" Simulation as an Effective and Cognitively Plausible Basis for Social Robotics

    DTIC Science & Technology

    2009-02-24

    havior of teams from observation. In: RoboCup 2002: robot soccer world cup, Fukuoka, Japan 25. Karin-D’Arcy MR, Povinelli DJ (2002) Do chimpanzees...2001) Building a multimodal human-robot interface. IEEE Intel Syst 16:16–20 41. Povinelli DJ, Eddy TJ (1994) The eyes as a window: what young

  16. The Role of Tumor Associated Macrophage in Recurrent Growth of Tumor Stem Cell

    DTIC Science & Technology

    2012-09-01

    Sica . Macrophage polarization: tumor-associated macrophages as a paradigm for polarized M2 mononuclear phagocytes. Trends Immunol. 23: 549-555...2002 3. Alberto Mantovani, Paola Allavena1, Antonio Sica and Frances Balkwill. Cancer-related inflammation. Nature. 454: 436-444, 2008 4. Karin E. de

  17. 75 FR 70019 - Notice of Submission of Proposed Information Collection to OMB; Emergency Comment Request...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-16

    ... CFR 4001.408 detail the requirements pertinent to HUD's single family mortgage insurance programs, i.e... mortgagees to mortgagors who are at risk of losing their homes to foreclosure. The new FHA-insured mortgages... FURTHER INFORMATION CONTACT: Karin Hill, Director, Office of Single Family Program Development, Department...

  18. A Phenomenological Model for Circadian and Sleep Allostatic Modulation of Plasma Cortisol Concentration

    DTIC Science & Technology

    2012-09-25

    decreased morning awakening salivary cortisol . Psychoneuroendo- crinology 29: 1184–1191, 2004. 2. Balbo M, Leproult R, Van Cauter E. Impact of sleep and...A phenomenological model for circadian and sleep allostatic modulation of plasma cortisol concentration David Thorsley,1 Rachel Leproult,2,3 Karine...2012 Thorsley D, Leproult R, Spiegel K, Reifman J. A phenomenological model for circadian and sleep allostatic modulation of plasma cortisol

  19. Review of National Work Programme on the Long Term Effects of Sustained High G on the Cervical Spine (Analyse du programme de travail national : les effets long terme sur la colonne cervicale d’un nombre de G lev et prolong )

    DTIC Science & Technology

    2008-12-01

    Prof. Karin Harms-Ringdahl, PhD, RPT Karolinska Institutet Department of Neurobiology, Care Sciences, and Society Division of Physiotherapy 23100...Äng Karolinska Institutet Department of Neurobiology, Care Sciences, and Society Division of Physiotherapy Alfred Nobels Allé 23100 SE-14183...report is in preparation. The RAF has an ongoing project (from August 2006 to September 2007) determining the need for physiotherapy for aircrew on the

  20. Equitable PERSTEMPO - The Challenge for Long-Term Deployed Armed Forces

    DTIC Science & Technology

    2003-04-07

    substantial impact on the operational effectiveness of the Bundeswehr of the future.  Rudolf Scharping Former Federal Minister of Defense The vision...Federal Minister of Defense, Rudolf Scharping, initiated a new force planning by means of the so-called "Cornerstones Paper" on 01 June 2000, the Chief of...Annex 1) 77 Rainer Marr, Timea Biro, and Karin Steiner , Vereinbarkeit von Familie und Beruf des Soldaten – Moeglichkeiten und Grenzen einer

  1. Perspectives on Positioning, Interaction, and Learning in Small-Group Discussion: Possibilities for Extending the Analytic Lens

    ERIC Educational Resources Information Center

    Kittleson, Julie M.; Wilson, Rachel E.

    2014-01-01

    In this forum piece, we respond to Karin Due's study of social dynamics in groups of students in physics class and gender issues that play out in this context. We discuss two threads that appear in Due's paper: one pertains to patterns of talk within groups and how these patterns open up possibilities for learning, the other pertains to…

  2. Bridging Ends to Means: Achieving a Viable Peace in Afghanistan

    DTIC Science & Technology

    2010-04-01

    Afghanistan ‟s social fabric. Analysts, for example, have drawn parallels between Taliban and Lebanon’s Hezbollah, a social and political movement that... Justice in Afghanistan edited by Antonio Donini, Norah Niland and Karin Wermester. Kumarian Press, 2004. United Nation Office on Drugs and Crime...AIR COMMAND AND STAFF COLLEGE AIR UNIVERSITY Bridging Ends to Means Achieving a Viable Peace in Afghanistan

  3. Defining "Weapons of Mass Destruction"

    DTIC Science & Technology

    2006-01-01

    Series Editor Stephen D. Carey, Research Associate Sarah L. Carlson, Research Project Specialist Robertson S. Gile, Research Associate Creighton hottinger...adopted February 13, 1947. For a history of the CCA, see Bernhard G. Bechhoefer, Postwar Negotiations for Arms Control (Washington, DC: The...Research Fellow RiChaRD a. Love Research Fellow KaRiN D. LioN Occasional Paper Series Editor Stephen D. Carey, Research Associate Sarah L. Carlson, Research

  4. 2011 AFMS Medical Research Symposium Held in National Harbor, Maryland on August 2-4, 2011. Volume 2: Enroute Care and Expeditionary Medicine Track

    DTIC Science & Technology

    2011-08-01

    Theater Hospital, Ballad Air Base, Iraq. (2006). Perspectives in vascular surgery and endovascular therapy_ 18:2, 91-99 Rasmussen, T., Woodson, J...LeppaniemiA (2002) Vascular Trauma: A 40 year Experience with Extremity Vascular Emphasis. Scandavian Journal of Surgery 91: 109-126, 2002 lHch, NM...Josh Walker Lena Napohlano Molly Tilley StephAn NOI1.h PaulileParl< C•rdlology EducatioriTraining Vascular Surgery Karin Hawkins John Mechtel TOdCI

  5. CPTAC Investigators Discuss Research Insights and Perspectives as part of ASBMB Journal Club - 12 Nov | Office of Cancer Clinical Proteomics Research

    Cancer.gov

    On Wednesday, November 12, 2014 from 2:00 PM to 3:00 PM EST, Daniel Liebler, PhD (Vanderbilt University) and Karin Rodland, PhD (Pacific Northwestern National Laboratory) and Ruedi Aebersold, PhD (Swiss Federal Institute of Technology) will share their research insight as part of the ASBMB Journal Club.  Both Doctors Liebler and Rodland are Principal Investigators in the NCI’s Clinical Proteomic Tumor Analysis Consortium.

  6. 2011 Special Operations Forces Industry Conference

    DTIC Science & Technology

    2011-05-19

    Forces Industry Conference Tampa, FL May 17-19, 2011 Agenda TUESDAY, MAY 17, 2011 BUSINESS OPPORTUNITIES SESSION Small Business and TILO Mrs...00 AM - 9:30 AM Small Business and TILO Ballrooms A-C  mrs. Karin Fones, Program support specialist, technology and Industry...531 Actions • Goal 31% • Achieved 45.6% • Industry Meetings – Hosted 89 Visits • TILO Engagements – FY10: 566 Requests, 115 Events, 1,014

  7. Perspectives on Positioning, Interaction, and Learning in Small-Group Discussion: Possibilities for Extending the Analytic Lens

    ERIC Educational Resources Information Center

    Kittleson, Julie M.; Wilson, Rachel E.

    2014-01-01

    In this forum piece, we respond to Karin Due's study of social dynamics in groups of students in physics class and gender issues that play out in this context. We discuss two threads that appear in Due's paper: one pertains to patterns of talk within groups and how these patterns open up possibilities for learning, the other pertains to…

  8. Case Study: South Texas Veterans Health Care System’s Communication Center

    DTIC Science & Technology

    2008-07-14

    Department Center and School BLDG 2841 MCCS-HFB (Army-Baylor Program in Health and Business Administration) 3151 Scott Road, Suite 1411 Fort Sam Houston...Program in Healthcare and Business Administration, Fort Sam Houston, TX to Andrew M. Welch, MHA, FACHE, Preceptor and Karin Waugh Zucker, MA, JD...noticeable improvement on no-show rates ( Hashim , Franks, & Fiscella, 2001). Telephone reminders are a very effective method of increasing attendance to

  9. Videogame-Based Training Success: The Impact of Trainee Characteristics - Year 2

    DTIC Science & Technology

    2006-07-01

    Technical Report 1188 Videogame -Based Training Success: The Impact of Trainee Characteristics - Year 2 Karin A. Orvis George Mason University...from... to) July2006 Final December 2004-March 2006 4. TITLE AND SUBTITLE 5a. CONTRACT OR GRANT NUMBER Videogame -Based Training Success: The Impact of...Matter POC: James Belanich 14. ABSTRACT (Maximum 200 words): Personal computer (PC)-based videogames are emerging as an increasingly popular training

  10. What is Informal Learning and What are its Antecedents? An Integrative and Meta-Analytic Review

    DTIC Science & Technology

    2014-07-01

    Christopher P. Cerasoli George M. Alliger Jamie S. Donsbach The Group for Organizational Effectiveness John E. Mathieu University of...Christopher P. Cerasoli, George M. Alliger , Jamie S. Donsbach; John E. Mathieu; Scott I. Tannenbaum; Karin A. Orvis 5c. PROJECT NUMBER...What are its Antecedents? An Integrative and Meta-Analytic Review Christopher P. Cerasoli, George M. Alliger Jamie S. Donsbach The Group for

  11. ASBMB Journal Club - Office of Cancer Clinical Proteomics Research

    Cancer.gov

    On Wednesday, November 12, 2014 from 2:00 PM to 3:00 PM EST, Daniel Liebler, PhD (Vanderbilt University) and Karin Rodland, PhD (Pacific Northwestern National Laboratory) and Ruedi Aebersold, PhD (Swiss Federal Institute of Technology) will share their research insight as part of the ASBMB Journal Club.  Both Doctors Liebler and Rodland are Principal Investigators in the NCI’s Clinical Proteomic Tumor Analysis Consortium.

  12. Regulation of the Prostate Cancer Tumor Microenvironment

    DTIC Science & Technology

    2015-04-01

    Science 317(5834), 124-127 (2007). 7. Naugler, W.E., Sakurai, T., Kim , S., Maeda, S., Kim , K., Elsharkawy, A.M., Karin, M. Gender disparity in liver...Elizabeth M. Peek ,1 Wang Song,2 Hanwei Zhang,3 Jiaoti Huang,4 and Arnold I. Chin1,3,5,6* 1Molecular Biology Institute, UCLA, Los Angeles, California...M. Peek and Wang Song made an equal contribution to this manuscript. The authors have nothing to disclose. Correspondence to: Arnold I. Chin, MD

  13. Radiation-Induced Immune Modulation in Prostate Cancer

    DTIC Science & Technology

    2006-01-01

    Research Society, Denver, CO, 2004. Dörthe Schaue, Yu-Pei Liao, Begonya Comin-Anduix, Antoni Ribas , Annelies Debucquoy, Karin Haustermans, and William H...Submitted, 2006. Schaue, D., Y. Liao, B. Comin-Anduix, A. Ribas , D.C. Altieri, A. Debucquoy, K. Haustermans and W.H. McBride: The Effect of Radiation...Comin-Anduix, A. Ribas , D.C. Altieri, A. Debucquoy, K. Haustermans and W.H. McBride: The Effect of Radiation Therapy on Tumor-Specific Immune Responses

  14. The Role of NF-kB in Normal and Transformed Mammary Epithelium.

    DTIC Science & Technology

    1998-08-01

    aAN has been constructed by standard molecular cloning techniques. The plasmid is called pBLG-AN. The avian IiB- aAN has been used successfully in...Mercurio, F., DiDonato, J., Rosette, C., and Karin, M. 1992. Molecular cloning and characterization of a novel Rel/NF-id3 family member displaying...reaching a peak during lactation. Using Dr. Clark’s pBJ41 construct, a transgene bearing the human NFKB2 cDNA has been constructed by standard molecular

  15. Persistent discourses in physics education: gender neutrality and the gendering of competence

    NASA Astrophysics Data System (ADS)

    Gonsalves, Allison

    2014-06-01

    In her article, Karin Due presents us with a contradiction in physics: the construction of physics as a symbolically masculine discipline alongside a simultaneous discourse of the "gender-neutrality" of the discipline. Due's article makes an important contribution to the study of the gendering of physics practices, particularly in group dynamics, and how this serves to simultaneously reinforce the two competing discourses of physics as a masculine discipline, and the discourse of physics as a gender neutral discipline. Due also suggests that an implication of this contradiction is a limited number of available positions for girls in physics compared to those available to boys. I wish to take up this observation and discuss how available positions for boys and girls in physics are related quite closely to two other concepts discussed in Due's article: competence and recognition.

  16. Perspectives on positioning, interaction, and learning in small-group discussion: possibilities for extending the analytic lens

    NASA Astrophysics Data System (ADS)

    Kittleson, Julie M.; Wilson, Rachel E.

    2014-06-01

    In this forum piece, we respond to Karin Due's study of social dynamics in groups of students in physics class and gender issues that play out in this context. We discuss two threads that appear in Due's paper: one pertains to patterns of talk within groups and how these patterns open up possibilities for learning, the other pertains to ways in which gender is constructed within groups and made visible via discourse. Our comments are intended to provide alternative ways of thinking about such issues. We hope to provide insight into how to deepen analyses of group dynamics and gender because research in both areas is important in terms of understanding how social contexts support and/or constrain learning, gender identity, and the like.

  17. Alois Alzheimer: A Hundred Years after the Discovery of the Eponymous Disorder

    PubMed Central

    Tagarelli, Antonio; Piro, Anna; Tagarelli, Giuseppe; Lagonia, Paolo; Quattrone, Aldo

    2006-01-01

    The familiar term “Alzheimer’s disease” was coined by Emil Kraepelin to honour his pupil, Alois Alzheimer. However, little is known about the life of the man after whom this important and well-known disease was termed. On the centennial of the discovery of Alzheimer’s disease, it is appropriate to report some aspects of the life and scientific work of Alois Alzheimer. The authors contacted all the libraries of the Universities where Alzheimer studied and/or worked to receive any original material regarding Alois Alzheimer. This review is based for a most part on an original biography written by Konrad and Urlike Maurer after the interviews to Alzheimer’s nieces, Hildegard Koeppen, Ilse Lieblein, Bärbel Lippert, Karin Weiβ, and his nephew, Rupert Finsterwalder. The authors obtained this biography from the Central Library of Medicine in Koeln. PMID:23674983

  18. The Nordic Tradition of Caring Science: The Works of Three Theorists.

    PubMed

    Arman, Maria; Ranheim, Albertine; Rydenlund, Kenneth; Rytterström, Patrik; Rehnsfeldt, Arne

    2015-10-01

    The Nordic tradition of caring science has had a significant influence on healthcare research, healthcare education and clinical development in the Nordic countries from 1990 to the present. Theoretical contributions from the professors and scientists Katie Eriksson, Kari Martinsen and Karin Dahlberg form the basis for this paper. The tradition has established a paradigm of ethics, ontology and epistemology for the caring science domain. Short introductions present the scientific background of Eriksson, Martinsen, and Dahlberg, and show how interpretive teamwork has led to the formation of an intertwining of the essential qualities of the theories. The synthesis emphasizes caring science as a human science, and views caring as a natural phenomenon where the patient's world, vulnerability, health, and suffering are primary. In the art and act of caring, relationships and dialogue are essential; they provide parameters where caring becomes visible in its absence. © The Author(s) 2015.

  19. Seine estuary modelling and AirSWOT measurements validation

    NASA Astrophysics Data System (ADS)

    Chevalier, Laetitia; Lyard, Florent; Laignel, Benoit

    2013-04-01

    In the context of global climate change, knowing water fluxes and storage, from the global scale to the local scale, is a crucial issue. The future satellite SWOT (Surface Water and Ocean Topography) mission, dedicated to the surface water observation, is proposed to meet this challenge. SWOT main payload will be a Ka-band Radar Interferometer (KaRIn). To validate this new kind of measurements, preparatory airborne campaigns (called AirSWOT) are currently being designed. AirSWOT will carry an interferometer similar to Karin: Kaspar-Ka-band SWOT Phenomenology Airborne Radar. Some campaigns are planned in France in 2014. During these campaigns, the plane will fly over the Seine River basin, especially to observe its estuary, the upstream river main channel (to quantify river-aquifer exchange) and some wetlands. The present work objective is to validate the ability of AirSWOT and SWOT, using a Seine estuary hydrodynamic modelling. In this context, field measurements will be collected by different teams such as GIP (Public Interest Group) Seine Aval, the GPMR (Rouen Seaport), SHOM (Hydrographic and Oceanographic Service of the Navy), the IFREMER (French Research Institute for Sea Exploitation), Mercator-Ocean, LEGOS (Laboratory of Space Study in Geophysics and Oceanography), ADES (Data Access Groundwater) ... . These datasets will be used first to validate locally AirSWOT measurements, and then to improve a hydrodynamic simulations (using tidal boundary conditions, river and groundwater inflows ...) for AirSWOT data 2D validation. This modelling will also be used to estimate the benefit of the future SWOT mission for mid-latitude river hydrology. To do this modelling,the TUGOm barotropic model (Toulouse Unstructured Grid Ocean model 2D) is used. Preliminary simulations have been performed by first modelling and then combining to different regions: first the Seine River and its estuarine area and secondly the English Channel. These two simulations h are currently being

  20. Spectro-dynamical asteroid families in the main belt

    NASA Astrophysics Data System (ADS)

    Bus, S.

    2014-07-01

    Spectral observations of collisionally-derived asteroid families continue to provide strong evidence that the surfaces of members from each family are spectrally homogeneous. This apparent homogeneity provides motivation to use new approaches in combining physical observations, such as spectral colors or albedo, with orbital parameters for the identification of family members and interlopers (e.g. [1,2]). The work described here uses the combined Sloan Digital Sky Survey colors (fourth release of the SDSS Moving Object Catalog [3]) and proper orbital elements from the Asteroids-Dynamics Site (AstDyS [4]) for 39,147 asteroids with semimajor axes between 2.1 and 3.2 au to search for ''spectro-dynamical'' families. The analysis is designed to identify groupings of asteroids that form statistically significant peaks in number density compared to the background population for a fixed spectral color distribution. A number of techniques from multivariate analysis are folded together and have been calibrated to accommodate asteroid families of different size, shape, and number density. In the final phase of the analysis, the number density for asteroids within a given spectral range is represented by 2-dimensional contour slices through proper-element space, and a visual inspection is made to confirm the reality of each grouping. Some families show evidence of complex structure that may be indicative of multiple collisional events over the history of the family. An example of this is the Karin family, which is located within the older, much larger Koronis family [5]. While both families are composed of asteroids classified as S-types, there is a significant color difference between the Koronis and Karin asteroids that is used to distinguish between members of the two families. In the same way, the Vesta family appears to be comprised of two distributions of asteroids that are offset in proper-element space and exhibit a statistically significant difference in the shape of

  1. New insights on the Karoo shale gas potential from borehole KZF-1 (Western Cape, South Africa)

    NASA Astrophysics Data System (ADS)

    Campbell, Stuart A.; Götz, Annette E.; Montenari, Michael

    2016-04-01

    A study on world shale reserves conducted by the Energy Information Agency (EIA) in 2013 concluded that there could be as much as 390 Tcf recoverable reserves of shale gas in the southern and south-western parts of the Karoo Basin. This would make it the 8th-largest shale gas resource in the world. However, the true extent and commercial viability is still unknown, due to the lack of exploration drilling and modern 3D seismic. Within the framework of the Karoo Research Initiative (KARIN), two deep boreholes were drilled in the Eastern and Western Cape provinces of South Africa. Here we report on new core material from borehole KZF-1 (Western Cape) which intersected the Permian black shales of the Ecca Group, the Whitehill Formation being the main target formation for future shale gas production. To determine the original source potential for shale gas we investigated the sedimentary environments in which the potential source rocks formed, addressing the research question of how much sedimentary organic matter the shales contained when they originally formed. Palynofacies indicates marginal marine conditions of a stratified basin setting with low marine phytoplankton percentages (acritarchs, prasinophytes), good AOM preservation, high terrestrial input, and a high spores:bisaccates ratio (kerogen type III). Stratigraphically, a deepening-upward trend is observed. Laterally, the basin configuration seems to be much more complex than previously assumed. Furthermore, palynological data confirms the correlation of marine black shales of the Prince Albert and Whitehill formations in the southern and south-western parts of the Karoo Basin with the terrestrial coals of the Vryheid Formation in the north-eastern part of the basin. TOC values (1-6%) classify the Karoo black shales as promising shale gas resources, especially with regard to the high thermal maturity (Ro >3). The recently drilled deep boreholes in the southern and south-western Karoo Basin, the first since the

  2. Scientists Outline Volcanic Ash Risks to Aviation

    NASA Astrophysics Data System (ADS)

    Showstack, Randy

    2011-01-01

    The ash clouds that belched out of Iceland's Eyjafjallajökull volcano last spring and dispersed over much of Europe, temporarily paralyzing aviation, were vast smoke signal warnings about the hazard that volcanic ash poses for air traffic around the world. At a 15 December news briefing at the AGU Fall Meeting in San Francisco, two experts with the U.S. Geological Survey (USGS) presented an overview of the damage airplanes can sustain from rock fragment- and mineral fragment-laden ash, an update on efforts to mitigate the hazard of ash, and an outline of further measures that are needed to address the problem. Between 1953 and 2009, there were 129 reported encounters of aircraft with volcanic ash clouds, according to a newly released USGS document cited at the briefing. The report, “Encounters of aircraft with volcanic ash clouds: A compilation of known incidents, 1953-2009,” by Marianne Guffanti, Thomas Casadevall, and Karin Budding, indicates that 26 encounters involved significant damage to the airplanes; nine of those incidents resulted in engine shutdown during flight. The report, which does not focus on the effects on airplanes of cumulative exposure to dilute ash and does not include data since 2009, indicates that “ash clouds continue to pose substantial risks to safe and efficient air travel globally.”

  3. An Infrared Radiative Transfer Parameterization For A Venus General Circulation Model

    NASA Astrophysics Data System (ADS)

    Eymet, Vincent; Fournier, R.; Lebonnois, S.; Bullock, M. A.; Dufresne, J.; Hourdin, F.

    2006-09-01

    A new 3-dimensional General Circulation Model (GCM) of Venus'atmosphere is curently under development at the Laboratoire de Meteorologie Dynamique, in the context of the Venus-Express mission. Special attention was devoted to the parameterization of infrared radiative transfer: this parameterization has to be both very fast and sufficiently accurate in order to provide valid results over extented periods of time. We have developped at the Laboratoire d'Energetique a Monte-Carlo code for computing reference radiative transfer results for optically thick inhomogeneous scattering planetary atmospheres over the IR spectrum. This code (named KARINE) is based on a Net-Exchange Rates formulation, and uses a k-distribution spectral model. The Venus spectral data, that was compiled at the Southwest Research Institute, accounts for gaseous absorption and scattering, typical clouds absorption and scattering, as well as CO2 and H2O absorption continuums. We will present the Net-Exchange Rates matrix that was computed using the Monte-Carlo approach. We will also show how this matrix has been used in order to produce a first-order radiative transfer parameterization that is used in the LMD Venus GCM. In addition, we will present how the proposed radiative transfer model was used in a simple convective-radiative equilibrium model in order to reproduce the main features of Venus' temperature profile.

  4. Extended Solar System Structures Observed by WISE

    NASA Astrophysics Data System (ADS)

    Sykes, Mark V.; Masci, Frank; Cutri, Roc; Walker, Russell; Mainzer, Amy; Bauer, James; Stevenson, Rachel; Tricarico, Pasquale

    2014-11-01

    Extended structures associated with recent asteroid collisions and comets were detected by the Infrared Astronomical Satellite, which conducted the first survey of the thermal emission of the sky in 1983. Twenty-seven years later, the Wide-field Infrared Survey Explorer (WISE), conducted a more sensitive survey of the sky at wavelengths spanning the shorter IRAS bandpasses and detected many of these same structures. Initial identifications include asteroid dust bands associated with collisions giving rise to the Karin and Beagle clusters within the Koronis and Themis asteroid families, respectively. An additional pair of bands is associated with the collision giving rise to the Veritas asteroid family. Comet trails associated with short-period comets have also been observed. Type 2 trails, detected by IRAS and possibly associated with asteroid collisions within the past few thousand years, have yet to be identified. Because WISE is significantly more sensitive than IRAS in the mid-infrared, it has detected some trails extending much further over their orbits and will greatly expand the catalog of trails detected in addition to those observed by IRAS and Spitzer (the latter by targeted observations). WISE and the yet more sensitive NEOCAM survey telescope will provide important insights into the recent collisional history of the asteroid belt and the nature and evolution of comets.

  5. Evaluation of New Fluorescent Lipophosphoramidates for Gene Transfer and Biodistribution Studies after Systemic Administration

    PubMed Central

    Belmadi, Nawal; Berchel, Mathieu; Denis, Caroline; Berthe, Wilfried; Sibiril, Yann; Le Gall, Tony; Haelters, Jean-Pierre; Jaffres, Paul-Alain; Montier, Tristan

    2015-01-01

    The objective of lung gene therapy is to reach the respiratory epithelial cells in order to deliver a functional nucleic acid sequence. To improve the synthetic carrier’s efficacy, knowledge of their biodistribution and elimination pathways, as well as cellular barriers faced, depending on the administration route, is necessary. Indeed, the in vivo fate guides the adaptation of their chemical structure and formulation to increase their transfection capacity while maintaining their tolerance. With this goal, lipidic fluorescent probes were synthesized and formulated with cationic lipophosphoramidate KLN47 (KLN: Karine Le Ny). We found that such formulations present constant compaction properties and similar transfection results without inducing additional cytotoxicity. Next, biodistribution profiles of pegylated and unpegylated lipoplexes were compared after systemic injection in mice. Pegylation of complexes led to a prolonged circulation in the bloodstream, whereas their in vivo bioluminescent expression profiles were similar. Moreover, systemic administration of pegylated lipoplexes resulted in a transient liver toxicity. These results indicate that these new fluorescent compounds could be added into lipoplexes in small amounts without perturbing the transfection capacities of the formulations. Such additional properties allow exploration of the in vivo biodistribution profiles of synthetic carriers as well as the expression intensity of the reporter gene. PMID:26540038

  6. The role of IL-17 signaling in regulation of the liver-brain axis and intestinal permeability in Alcoholic Liver Disease

    PubMed Central

    Ma, Hsiao-Yen; Xu, Jun; Liu, Xiao; Zhu, Yunheng; Gao, Bin; Karin, Michael; Tsukamoto, Hidekazu; Jeste, Dilip V.; Grant, Igor; Roberts, Amanda J; Contet, Candice; Geoffroy, Cedric; Zheng, Binhai; Brenner, David; Kisseleva, Tatiana

    2016-01-01

    Alcoholic liver disease (ALD) progresses from a normal liver, to steatosis, steatohepatitis, fibrosis and hepatocellular carcinoma (HCC). Despite intensive studies, the pathogenesis of ALD is poorly understood, in part due to a lack of suitable animal models which mimic the stages of ALD progression. Furthermore, the role of IL-17 in ALD has not been evaluated. We and others have recently demonstrated that IL-17 signaling plays a critical role in development of liver fibrosis and cancer. Here we summarize the most recent evidence supporting the role of IL-17 in ALD. As a result of a collaborative effort of Drs. Karin, Gao, Tsukamoto and Kisseleva, we developed several improved models of ALD in mice: 1) chronic-plus-binge model that mimics early stages of steatohepatitis, 2) intragastric ethanol feeding model that mimics alcoholic steatohepatitis and fibrosis, and 3) diethylnitrosamine (DEN)+alcohol model that mimics alcoholic liver cancer. These models might provide new insights into the mechanism of IL-17 signaling in ALD and help identify novel therapeutic targets. PMID:27239399

  7. Using Sentinel-2A multispectral imagery to explore for deep groundwater resources in the Ceres-Tankwa Karoo, Western Cape, South Africa: Significance for the 'water-energy(-food) nexus' in an arid region

    NASA Astrophysics Data System (ADS)

    Hartnady, Chris; Wise, Edward; Hartnady, Michael; Olianti, Camille; Hay, E. Rowena

    2017-04-01

    warming and increasing water scarcity in semi-arid regions, deep artesian groundwater systems provide a long-term solution to future demands for water, food and power. In contrast to shale-gas development, which competes for the scarce water resource and poses a substantial pollution threat, an alternative, synergistic and conjunctive development of solar energy, specifically Concentrating Solar Power plants facilitated by the deep artesian groundwater resource, is envisaged for the Ceres-Tankwa and other parts of the Southern Karoo, in a proposed "Sores-Kamma (Sun-Water) Initiative". In this effort, Sentinel-2A-based lithological mapping is integrated with a new digital elevation model, providing geomorphometry and morphotectonic interpretations, and with the systematic monitoring of surface- and groundwater fluxes using a conjunction of radar satellite, Global Navigation Satellite Systems and microgravity approaches. Reference De Kock, M.O., Beukes, N.J., Götz, A.E., Cole, D., Birch, A., Withers, A. and Van Niekerk, H.S. 2016. Open file progress report on exploration of the southern Karoo Basin through CIMERA-KARIN borehole KZF-1 in the Tankwa Karoo, Witzenberg (Ceres) District. 12 pp. Available online at http://www.cimera.co.za/index.php/karin-feedback

  8. Multiverse: Increasing Diversity in Earth and Space Science Through Multicultural Education

    NASA Astrophysics Data System (ADS)

    Peticolas, L. M.; Raftery, C. L.; Mendez, B.; Paglierani, R.; Ali, N. A.; Zevin, D.; Frappier, R.; Hauck, K.; Shackelford, R. L., III; Yan, D.; Thrall, L.

    2015-12-01

    Multiverse at the University of California, Berkeley Space Sciences Laboratory provides earth and space science educational opportunities and resources for a variety of audiences, especially for those who are underrepresented in the sciences. By way of carefully crafted space and earth science educational opportunities and resources, we seek to connect with people's sense of wonder and facilitate making personal ties to science and the learning process in order to, ultimately, bring the richness of diversity to science and make science discovery accessible for all. Our audiences include teachers, students, education and outreach professionals, and the public. We partner with NASA, the National Science Foundation, scientists, teachers, science center and museum educators, park interpreters, and others with expertise in reaching particular audiences. With these partners, we develop resources and communities of practice, offer educator workshops, and run events for the public. We will will present on our pedagogical techniques, our metrics for success, and our evaluation findings of our education and outreach projects that help us towards reaching our vision: We envision a world filled with science literate societies capable of thriving with today's technology, while maintaining a sustainable balance with the natural world; a world where people develop and sustain the ability to think critically using observation and evidence and participate authentically in scientific endeavors; a world where people see themselves and their culture within the scientific enterprise, and understand science within the context that we are all under one sky and on one Earth. Photo Caption: Multiverse Team Members at our Space Sciences Laboratory from left to right: Leitha Thrall, Daniel Zevin, Bryan Mendez, Nancy Ali, Igor Ruderman, Laura Peticolas, Ruth Paglierani, Renee Frappier, Rikki Shackelford, Claire Raftery, Karin Hauck, and Darlene Yan.

  9. Using trees to remediate tritium contaminated groundwater: a modeling and tracer study.

    SciTech Connect

    Rebel, Karin, Theodora

    2004-01-01

    Rebel, Karin, T. 2004. Using trees to remediate tritium contaminated groundwater: a modeling and tracer study. Ph.D Dissertation. Cotnell University. Ithaca, New York. 174 pp. Abstract: We have developed a spatially explicit model of water and tritium fluxes in the vadose zone in order to simulate water uptake and subsurface lateral movement in coniferous and mixed hardwood - coniferous forests on Coastal Plain soils of the southern United States. These Coastal Plain soils are characteristically sand overlying slowly permeable clays found at depths of 30 to 200 cm, and can form temporarily saturated, unconfined aquifers. Ten hectares of the modeled watershed was periodically irrigated with tritium enriched water. We used the tritium enriched water as a tracer to validate the model. The model was used to optimize irrigation, to evaluate the amount of tritium entering the atmosphere due to evapotranspiration and to quantify water and tritium fluxes in texture contrast soils. Using tritium as a tracer, we have studied how tree species and canopy position effect water and solutes uptake from different parts of the soil profile. We clipped branches to obtain leaf water from over-and understory laurel oak (Quercus Laurifolia) and over- and understory pine (Pinus elliottii and Pinus taeda), which was then analyzed for tritium. We found that for early successional trees (Pinus spp.) and trees in the overstory proportionally more water was taken up from deeper in the soil compared to the hardwoods or trees in the understory, which took up proportionally more water from the soil surface. These differences are important for understanding competition for resources within a forest and in predicting the hydrologic response to forest management practices such as thinning.

  10. NASA Tech Briefs, December 2011

    NASA Technical Reports Server (NTRS)

    2011-01-01

    Topics covered include: 1) SNE Industrial Fieldbus Interface; 2) Composite Thermal Switch; 3) XMOS XC-2 Development Board for Mechanical Control and Data Collection; 4) Receiver Gain Modulation Circuit; 5) NEXUS Scalable and Distributed Next-Generation Avionics Bus for Space Missions; 6) Digital Interface Board to Control Phase and Amplitude of Four Channels; 7) CoNNeCT Baseband Processor Module; 8) Cryogenic 160-GHz MMIC Heterodyne Receiver Module; 9) Ka-Band, Multi-Gigabit-Per-Second Transceiver; 10) All-Solid-State 2.45-to-2.78-THz Source; 11) Onboard Interferometric SAR Processor for the Ka-Band Radar Interferometer (KaRIn); 12) Space Environments Testbed; 13) High-Performance 3D Articulated Robot Display; 14) Athena; 15) In Situ Surface Characterization; 16) Ndarts; 17) Cryo-Etched Black Silicon for Use as Optical Black; 18) Advanced CO2 Removal and Reduction System; 19) Correcting Thermal Deformations in an Active Composite Reflector; 20) Umbilical Deployment Device; 21) Space Mirror Alignment System; 22) Thermionic Power Cell To Harness Heat Energies for Geothermal Applications; 23) Graph Theory Roots of Spatial Operators for Kinematics and Dynamics; 24) Spacesuit Soft Upper Torso Sizing Systems; 25) Radiation Protection Using Single-Wall Carbon Nanotube Derivatives; 26) PMA-PhyloChip DNA Microarray to Elucidate Viable Microbial Community Structure; 27) Lidar Luminance Quantizer; 28) Distributed Capacitive Sensor for Sample Mass Measurement; 29) Base Flow Model Validation; 30) Minimum Landing Error Powered-Descent Guidance for Planetary Missions; 31) Framework for Integrating Science Data Processing Algorithms Into Process Control Systems; 32) Time Synchronization and Distribution Mechanisms for Space Networks; 33) Local Estimators for Spacecraft Formation Flying; 34) Software-Defined Radio for Space-to-Space Communications; 35) Reflective Occultation Mask for Evaluation of Occulter Designs for Planet Finding; and 36) Molecular Adsorber Coating

  11. Well-ordered science and Indian epistemic cultures: toward a polycentered history of science.

    PubMed

    Ganeri, Jonardon

    2013-06-01

    This essay defends the view that "modern science," as with modernity in general, is a polycentered phenomenon, something that appears in different forms at different times and places. It begins with two ideas about the nature of rational scientific inquiry: Karin Knorr Cetina's idea of "epistemic cultures," and Philip Kitcher's idea of science as "a system of public knowledge," such knowledge as would be deemed worthwhile by an ideal conversation among the whole public under conditions of mutual engagement. This account of the nature of scientific practice provides us with a new perspective from which to understand key elements in the philosophical project of Jaina logicians in the seventh, eighth, and ninth centuries C.E. Jaina theory seems exceptionally well targeted onto two of the key constituents in the ideal conversation--the classification of all human points of view and the representation of end states of the deliberative process. The Buddhist theory of the Kathāvatthu contributes to Indian epistemic culture in a different way: by supplying a detailed theory of how human dialogical standpoints can be revised in the ideal conversation, an account of the phenomenon Kitcher labels "tutoring." Thus science in India has its own history, one that should be studied in comparison and contrast with the history of science in Europe. In answer to Joseph Needham, it was not 'modern science' which failed to develop in India or China but rather non-well-ordered science, science as unconstrained by social value and democratic consent. What I argue is that this is not a deficit in the civilisational histories of these countries, but a virtue.

  12. Lunar and Planetary Science XXXVI, Part 18

    NASA Technical Reports Server (NTRS)

    2005-01-01

    Topics discussed include: PoDS: A Powder Delivery System for Mars In-Situ Organic, Mineralogic and Isotopic Analysis Instruments Planetary Differentiation of Accreting Planetesimals with 26Al and 60Fe as the Heat Sources Ground-based Observation of Lunar Surface by Lunar VIS/NIR Spectral Imager Mt. Oikeyama Structure: First Impact Structure in Japan? Central Mounds in Martian Impact Craters: Assessment as Possible Perennial Permafrost Mounds (Pingos) A Further Analysis of Potential Photosynthetic Life on Mars New Insight into Valleys-Ocean Boundary on Mars Using 128 Pixels per Degree MOLA Data: Implication for Martian Ocean and Global Climate Change; Recursive Topography Based Surface Age Computations for Mars: New Insight into Surficial Processes That Influenced Craters Distribution as a Step Toward the Formal Proof of Martian Ocean Recession, Timing and Probability; Laser-induced Breakdown Spectroscopy: A New Method for Stand-Off Quantitative Analysis of Samples on Mars; Milk Spring Channels Provide Further Evidence of Oceanic, >1.7-km-Deep Late Devonian Alamo Crater, Southern Nevada; Exploration of Martian Polar Residual Caps from HEND/ODYSSEY Data; Outflow Channels Influencing Martian Climate: Global Circulation Model Simulations with Emplaced Water; Presence of Nonmethane Hydrocarbons on Pluto; Difference in Degree of Space Weathering on the Newborn Asteroid Karin; Circular Collapsed Features Related to the Chaotic Terrain Formation on Mars; A Search for Live (sup 244)Pu in Deep-Sea Sediments: Preliminary Results of Method Development; Some Peculiarities of Quartz, Biotite and Garnet Transformation in Conditions of Step-like Shock Compression of Crystal Slate; Error Analysis of Remotely-Acquired Mossbauer Spectra; Cloud Activity on Titan During the Cassini Mission; Solar Radiation Pressure and Transient Flows on Asteroid Surfaces; Landing Site Characteristics for Europa 1: Topography; and The Crop Circles of Europa.

  13. Lunar and Planetary Science XXXVI, Part 18

    NASA Technical Reports Server (NTRS)

    2005-01-01

    Topics discussed include: PoDS: A Powder Delivery System for Mars In-Situ Organic, Mineralogic and Isotopic Analysis Instruments Planetary Differentiation of Accreting Planetesimals with 26Al and 60Fe as the Heat Sources Ground-based Observation of Lunar Surface by Lunar VIS/NIR Spectral Imager Mt. Oikeyama Structure: First Impact Structure in Japan? Central Mounds in Martian Impact Craters: Assessment as Possible Perennial Permafrost Mounds (Pingos) A Further Analysis of Potential Photosynthetic Life on Mars New Insight into Valleys-Ocean Boundary on Mars Using 128 Pixels per Degree MOLA Data: Implication for Martian Ocean and Global Climate Change; Recursive Topography Based Surface Age Computations for Mars: New Insight into Surficial Processes That Influenced Craters Distribution as a Step Toward the Formal Proof of Martian Ocean Recession, Timing and Probability; Laser-induced Breakdown Spectroscopy: A New Method for Stand-Off Quantitative Analysis of Samples on Mars; Milk Spring Channels Provide Further Evidence of Oceanic, >1.7-km-Deep Late Devonian Alamo Crater, Southern Nevada; Exploration of Martian Polar Residual Caps from HEND/ODYSSEY Data; Outflow Channels Influencing Martian Climate: Global Circulation Model Simulations with Emplaced Water; Presence of Nonmethane Hydrocarbons on Pluto; Difference in Degree of Space Weathering on the Newborn Asteroid Karin; Circular Collapsed Features Related to the Chaotic Terrain Formation on Mars; A Search for Live (sup 244)Pu in Deep-Sea Sediments: Preliminary Results of Method Development; Some Peculiarities of Quartz, Biotite and Garnet Transformation in Conditions of Step-like Shock Compression of Crystal Slate; Error Analysis of Remotely-Acquired Mossbauer Spectra; Cloud Activity on Titan During the Cassini Mission; Solar Radiation Pressure and Transient Flows on Asteroid Surfaces; Landing Site Characteristics for Europa 1: Topography; and The Crop Circles of Europa.

  14. Plastic matters: an analytical procedure to evaluate the degradability of contemporary works of art.

    PubMed

    Lazzari, Massimo; Ledo-Suárez, Ana; López, Thaïs; Scalarone, Dominique; López-Quintela, M Arturo

    2011-03-01

    The most significant results concerning a chemical study to evaluate the degradability of polymeric components in four contemporary works of art, partially or completely realized in plastics, are presented and discussed in this paper. The procedure applied is mainly based on the use of Fourier transform IR and UV-vis spectroscopies and pyrolysis-gas chromatography/mass spectrometry, and consists of the following steps: (1) compositional analysis of the artworks, with particular attention to components which may have a negative effect on the overall ageing; (2) evaluation of the actual state of conservation; (3) investigation of the accelerated ageing of reference polymer samples; and (4) monitoring of the natural ageing of the artworks. On such a basis, the following could be concluded. Stage Evidence by Loris Cecchini is made of poly(ether urethane) elastomer which contains a high amount of phthalates. Their exudation gives a sticky appearance to the artwork and their removal during ageing is the main cause of the loss of flexibility. The latex used by Andrés Pinal for tailoring Traxe de Home is a natural polyisoprene, whose oxidative degradation accounts for the extensive deterioration and yellowing of the artwork. The plaster sculptures of 3D Bodyscans 1:9 by Karin Sander are coated with an aliphatic epoxy resin. Its oxidation with formation of amides is the cause of the surface yellowing. The adhesive used by Dario Villalba for Tierra, Ladrillo y Agua is a commercial poly(vinyl acetate). Simulated photoageing suggests a fast deterioration due to deacetylation and cross-linking, which possibly is the main reason for the actual detachment of debris from the support.

  15. Surface heterogeneity of small asteroids

    NASA Astrophysics Data System (ADS)

    Sasaki, Sho

    A rubble pile model of asteroid origin would predict averaged rather homogeneous surface of an asteroid. Previous spacecraft observations (mostly S-type asteroids) did not show large color/albedo variation on the surface. Vesta would be exceptional since HST observation suggested that its surface should be heterogeneous due to the impact excavation of the interior. As for a young asteroid (832) Karin (age being 5Ma), Sasaki et al. (2004) detected variation of infrared spectra which could be explained by the difference of the space weathering degree. They discussed the possibility of the survival of the old surface. However, the variation was not confirmed by later observation (Chapman et al., 2007; Vernazza et al., 2007). Recent observation of a small (550m) asteroid Itokawa by Hayabusa spacecraft revealed that Itokawa is heterogeneous in color and albedo although the overall rocky structure is considered as a rubble pile (Saito et al., 2006). The color difference can be explained by the difference of weathering degree (Ishiguro et al., 2008). The heterogeneity could be explained by mass movement caused by rapid rotation from YORP effect (Scheeres et al., 2007) or seismic shaking (Sasaki, 2006). Probably small silicate asteroids without significant regolith could have heterogeneous in color and albedo. On large asteroids (˜ a few 10km), regolith reaccumulation should have covered the underlying heterogeneity. References: Chapman, C. R. et al (2007) Icarus, 191, 323-329 Ishiguro, M. et al. (2008) MAPS, in press. Saito, J. et al. (2006) Science, 312, 1341-1344 Sasaki, S. (2006) in Spacecraft Reconnaissance of Asteroid and Comet Interiors Sasaki, T. et al (2004) Astrophys. J. 615, L161-L164 Scheeres, D. J. (2007) Icarus 188, 425-429 Vernazza, P. et al. (2007) Icarus 191, 330-336.

  16. Defining the Flora Family: Reflectance Properties and Age

    NASA Astrophysics Data System (ADS)

    Dykhuis, Melissa J.; Molnar, Lawrence A.; Van Kooten, Samuel J; Greenberg, Richard

    2014-05-01

    The Flora family resides in the densely populated inner main belt, bounded in semimajor axis by the ν6 secular resonance and the Jupiter 3:1 mean motion resonance. The presence of several large families that overlap dynamically with the Floras (e.g. the Vesta, Baptistina, and Nysa-Polana families), and the removal of a significant fraction of Floras via the nearby ν6 resonance have historically complicated the Flora family's distinction in both proper orbital elements and reflectance properties. Here we use orbital information from AstDyS, color information from SDSS, and albedo information from WISE, to obtain the characteristic orbital and reflectance properties of the Floras, by sampling the core of the family in multidimensional phase space. We find the characteristic Flora SDSS colors to be a* = 0.127 ± 0.012 and i-z = -0.038 ± 0.008; the characteristic Flora albedo is pV = 0.295 ± 0.006. These properties allow us to select a high-purity sample of Floras with similar orbital and reflectance properties as required for a detailed dynamical study. We then use the young Karin family, for which we have an age determined via direct backward integration of members' orbits, to calibrate the Yarkovsky drift rates for the Flora family without having to estimate the Floras' material properties. The size-dependent dispersion of the Flora members in semimajor axis (the "V" plot) then yields an age for the family of 940+160-120 My. We discuss the effects on our age estimate of two independent processes that both introduce obliquity variations among the family members on short (My) timescales: 1) the capture of Flora members in spin-orbit resonance, and 2) YORP-driven obliquity variation through YORP cycles. Accounting for these effects does not significantly change the age determination.

  17. 2012 Aspen Winter Conference New Paradigms for Low-Dimensional Electronic Materials, February 5-10, 2012

    SciTech Connect

    Moore, Joel; Rabe, Karin; Nayak, Chetan; Troyer, Matthias

    2012-05-01

    Aspen Center for Physics Project Summary DOE Budget Period: 10/1/2011 to 9/30/2012 Contract # DE-SC0007479 New Paradigms for Low-Dimensional Electronic Materials The 2012 Aspen Winter Conference on Condensed Matter Physics was held at the Aspen Center for Physics from February 5 to 10, 2012. Seventy-four participants from seven countries, and several universities and national labs attended the workshop titled, New Paradigms for Low-Dimensional Electronic Materials. There were 34 formal talks, and a number of informal discussions held during the week. Talks covered a variety of topics related to DOE BES priorities, including, for example, advanced photon techniques (Hasan, Abbamonte, Orenstein, Shen, Ghosh) and predictive theoretical modeling of materials properties (Rappe, Pickett, Balents, Zhang, Vanderbilt); the full conference schedule is provided with this report. The week's events included a public lecture (Quantum Matters given by Chetan Nayak from Microsoft Research) and attended by 234 members of the public, and a physics caf© geared for high schoolers that is a discussion with physicists conducted by Kathryn Moler (Stanford University) and Andrew M. Rappe (University of Pennsylvania) and attended by 67 locals and visitors. While there were no published proceedings, some of the talks are posted online and can be Googled. The workshop was organized by Joel Moore (University of California Berkeley), Chetan Nayak (Microsoft Research), Karin Rabe (Rutgers University), and Matthias Troyer (ETH Zurich). Two organizers who did not attend the conference were Gabriel Aeppli (University College London & London Centre for Nanotechnology) and Andrea Cavalleri (Oxford University & Max Planck Hamburg).

  18. Whither Cometary Dust?

    NASA Astrophysics Data System (ADS)

    Lisse, Carey M.

    2010-10-01

    In this paper I will discuss recent findings that have important implications for our understanding of the formation and evolution of primitive solar system dust, including: - Nesvorny et al. (2010), following up on their dynamical analyses of the zodiacal dust bands as sourced by the breakup of the Karin (5Mya) and Veritas (8Mya) asteroid families, argue that over 90% of the interplanetary dust cloud at 1 AU comes from JFC comets with near-circularized, low inclination orbits. This implies that the noted IPD collections of anhydrous and hydrous dust particles are likely to be from Oort cloud and JFC comets, respectively, not from asteroids and comets as thought in the past. Hydrous dust particles from comets like 85P/Wild2 and 9P/Tempel 1 would be consistent with results from the STARDUST and Deep Impact experiments. - Estimates of the dust particle size distributions (PSDs) in the comae of 85P/Wild2 (Green et al. 2004, 2007) and 73P/SW-3 (Sitko et al. 2010, Vaubaillon & Reach 2010) and in the trails of comets (Reach et al. 2007) have broken power law structure, with a plateau enhancement of particles of 1 mm - 1 cm in size. This size is also the size of most chondritic inclusions, and the predicted size range of the "aggregational barrier", where collisions between dust particles become destructive. - Studies of the albedo and polarization properties of cometary dust (Kolokolova et al. 2007) suggest there are 2 major groupings, one with low scattering capability and one with high. While these families could possibly have been explained by systematics in the PSDs of the emitted dust, independent work by Lisse et al. (2008) on the mineralogy of a number of highly dusty comets has shown evidence for one family of comets with highly crystalline dust and another with highly amorphous dust.

  19. Bringing radical behaviorism to revolutionary Brazil and back: Fred Keller's Personalized System of Instruction and Cold War engineering education.

    PubMed

    Akera, Atsushi

    2017-09-12

    This article traces the shifting epistemic commitments of Fred S. Keller and his behaviorist colleagues during their application of Skinnerian radical behaviorism to higher education pedagogy. Building on prior work by Alexandra Rutherford and her focus on the successive adaptation of Skinnerian behaviorism during its successive applications, this study utilizes sociologist of science Karin Knorr Cetina's concept of epistemic cultures to more precisely trace the changes in the epistemic commitments of a group of radical behaviorists as they shifted their focus to applied behavioral analysis. The story revolves around a self-paced system of instruction known as the Personalized System of Instruction, or PSI, which utilized behaviorist principles to accelerate learning within the classroom. Unlike Skinner's entry into education, and his focus on educational technologies, Keller developed a mastery-based approach to instruction that utilized generalized reinforcers to cultivate higher-order learning behaviors. As it happens, the story also unfolds across a rather fantastic political terrain: PSI originated in the context of Brazilian revolutionary history, but circulated widely in the U.S. amidst Cold War concerns about an engineering manpower(sic) crisis. This study also presents us with an opportunity to test Knorr Cetina's conjecture about the possible use of a focus on epistemic cultures in addressing a classic problem in the sociology of science, namely unpacking the relationship between knowledge and its social context. Ultimately, however, this study complements another historical case study in applied behavioral analysis, where a difference in outcome helps to lay out the range of possible shifts in the epistemic commitments of radical behaviorists who entered different domains of application. The case study also has some practical implications for those creating distance learning environments today, which are briefly explored in the conclusion. © 2017 Wiley

  20. Size and Age Dependence of Koronis Family Colors

    NASA Astrophysics Data System (ADS)

    Molnar, L. A.

    2011-10-01

    The ancient and massive Koronis family now has four identified subfamilies (asteroid families made by the breakup of fragments of the ancient collision), with ages running from 5.7 to 290 My. This presents unique opportunities to explore space weathering processes, along with dynamical processes such as collisions and binary formation and destruction. Analysis of family members with accurate SDSS measurements shows a correlation of average subfamily color with age that for the first time is highly statistically significant. Yet Thomas et al. (2011) report a size dependence of the colors of the ancient family that demands caution when comparing subfamilies with differing size distributions. Reanalyis of the Thomas et al. data show the reported break near asteroid diameter 5 km is not significant. However, analysis of the much more extensive SDSS data set show a significant break past diameter 2.5 km, with smaller objects systematically bluer. The break is not present in the Karin subfamily (the youngest at 5.7 My), but is already fully developed in the Eriphyla subfamily (only 220 My). The reddening trend with age remains even when comparing only asteroids of similar size, confirming the presence of space weathering phenomena. The meaning of the trend with size is not immediately clear. We consider briefly the strengths and weaknesses of several interpretations of the bluer colors for small objects: 1) those objects receive more jolts from random collisions capable of shaking the regolith and exposing fresh material beneath; 2) those objects receive more jolts from the cycle of fission and recombination driven by YORP; and 3) the lower gravity on those objects retains regolith less well.

  1. Heparanase and a synthetic peptide of heparan sulfate-interacting protein recognize common sites on cell surface and extracellular matrix heparan sulfate.

    PubMed

    Marchetti, D; Liu, S; Spohn, W C; Carson, D D

    1997-06-20

    Heparanase is an endo-beta-D-glucuronidase that degrades the glycosaminoglycan chains of heparan sulfate (HS) proteoglycans at specific sites. Elevated levels of heparanase are associated with the metastatic potential of melanoma and other types of tumor cells. We previously reported heparanase degradation of cell surface HS subpopulations of the human adenocarcinoma cell line RL95. In the present study, heparanase activity was examined on RL95 cell surface HS subpopulations in the presence of a synthetic peptide (CRPKAKAKAKAKDQTK) of heparin/heparan sulfate-interacting protein (HIP; Liu, S., Smith, S. E., Julian, J., Rohde, L. H., Karin, N. J., and Carson, D. D. (1996) J. Biol. Chem. 271, 11817-11823). Heparanase digestion generated HS fragments from cell surface- or extracellular matrix-derived HS of approximately 25 and 9 kDa, respectively. In contrast, HS of various size classes isolated from proteoglycans secreted or released by RL95 and endothelial cells in culture were not susceptible to heparanase digestion. Incubation of heparanase-containing melanoma cellular extracts or partially purified heparanase preparations with cell surface- or ECM-derived HS and HIP peptide, but not a scrambled sequence of this peptide or other HS-binding proteins present in ECM, completely inhibited heparanase action. Conversely, predigestion of cell surface HS with either heparanase-containing cellular extracts or with secreted or partially purified heparanase destroyed binding to HIP peptide. Preincubation of HS with HIP peptide prevented subsequent heparanase digestion. Collectively, these data demonstrate that HIP peptide and heparanase recognize specific, common motifs within HS chains at cell surfaces and in ECM and may mutually modulate HS-dependent activities.

  2. Identification of SLF1 as a new copper homeostasis gene involved in copper sulfide mineralization in Saccharomyces cerevisiae.

    PubMed Central

    Yu, W; Farrell, R A; Stillman, D J; Winge, D R

    1996-01-01

    In Saccharomyces cerevisiae, at least 12 genes are important for cells to propagate in medium containing elevated concentrations of copper salts (J. Welch, S. Fogel, C. Buchman, and M. Karin, EMBO J. 8:255-260, 1989). Complementation studies were carried out on a copper-sensitive mutation (cup14) from this group. A new yeast gene, designated SLF1, was identified as a multicopy suppressor of the cup14 mutation. Slf1 is important for the physiological process of copper sulfide (CuS) mineralization on the surface of cells cultured in medium containing copper salts. CuS mineralization causes the cells to turn brown. Disruption of SLF1, which is located close to the telomere region of chromosome IV, leads to limited copper sensitivity, and the resulting cells lack the normal brownish coloration when grown in CuSO4-containing medium. Overproduction of Slf1 in wild-type cells confers superresistance to CuSO4 and enhances the coloration of cells cultured in the presence of CuSO4. Upon addition of KCN to Cu-grown cells, the brownish coloration was bleached instantly, and copper ions were solubilized. These data are consistent with Slf1-dependent accumulation of CuS complexes on the cell surface. Disruption of SFL1 also results in loss of the ability of yeast cells to deplete Cu but not Cd ions from the growth medium, whereas overexpression enhances Ca depletion ability and the resulting deposition of CuS particles. It is proposed that Slfl participates in a copper homeostasis pathway, distinct from the Cup1 detoxification system, that leads to sulfide generation and CuS biomineralization on the cell surface. This process may coordinate with the Cup1 pathway at different copper concentrations to prevent copper-induced toxicity. PMID:8628314

  3. A New Solar System Dust Band

    NASA Astrophysics Data System (ADS)

    Espy, Ashley J.; Dermott, S. F.; Kehoe, T. J.; Jayaraman, S.

    2007-10-01

    The relative proportions of asteroidal and cometary material in the zodiacal cloud is an evolving debate. The determination of the asteroidal component is constrained through the study of the dust bands (the fine-structure component superimposed on the broad background cloud), since they have been confidently linked to specific, young, asteroid family disruptions in the main belt. These disruptions represent recent injections of dust into the cloud and thus hold the key to determining at least a minimum value of the asteroidal contribution. There are currently known to be three dust band pairs, one at approximately 10 degrees corresponding to the Veritas family and two central band pairs near the ecliptic, one of which corresponds to the Karin cluster of the Koronis family. However, through careful co-adding of almost all the pole-to-pole intensity scans in the mid infrared wavebands of the IRAS data set, a new solar system dust band has been found at approximately 17 degrees inclination. We think this is a confirmation of the M/N partial band pair suggested by Sykes (1988). The new dust band appears to be mostly, yet not completely formed, which we attribute to the young age of the likely sources. We will present dynamical modeling of the new band which allows us to determine the most likely source and amount of cross-sectional area of dust in the band. This is turn allows us to put constraints on the size of the precursor and amount of dust contributed by this source to the background cloud. Since the band is incomplete, the dynamics of the distribution of the node will allow us to put loose constraints on the time of formation of this band and compare with the ages of the potential sources. This work is funded by NASA GSRP.

  4. Evidence from IRAS for a very young, partially formed dust band

    NASA Astrophysics Data System (ADS)

    Espy, Ashley J.; Dermott, Stanley F.; Kehoe, Thomas J. J.; Jayaraman, Sumita

    2009-02-01

    The relative proportions of asteroidal and cometary materials in the zodiacal cloud is an ongoing debate. The determination of the asteroidal component is constrained through the study of the Solar System dust bands (the fine-structure component superimposed on the broad background cloud), since they have been confidently linked to specific, young, asteroid families in the main belt. The disruptions that produce these families also result in the injection of dust into the cloud and thus hold the key to determining at least a minimum value for the asteroidal contribution to the zodiacal cloud. There are currently known to be at least three dust band pairs, one at approximately 9.35° associated with the Veritas family and two central band pairs near the ecliptic, one of which is associated with the Karin subcluster of the Koronis family. Through careful co-adding of almost all the pole-to-pole intensity scans in the mid-infrared wavebands of the Infrared Astronomical Satellite (IRAS) data set, we find strong evidence for a partial Solar System dust band, that is, a very young dust band in the process of formation, at approximately 17° latitude. We think this is a confirmation of the M/N partial band pair first suggested by Sykes [1988. IRAS observations of extended zodiacal structures. Astrophys. J. 334, L55-L58]. The new dust band appears at some but not all ecliptic longitudes, as expected for a young, partially formed dust band. We present preliminary modeling of the new, partial dust band which allows us to put constraints on the age of the disruption event, the inclination and node of the parent body at the time of disruption, and the quantity of dust injected into the zodiacal cloud.

  5. On Hilbert-Huang Transform Based Synthesis of a Signal Contaminated by Radio Frequency Interference or Fringes

    NASA Technical Reports Server (NTRS)

    Kizhner, Semion; Shiri, Ron S.; Vootukuru, Meg; Coletti, Alessandro

    2015-01-01

    Norden E. Huang et al. had proposed and published the Hilbert-Huang Transform (HHT) concept correspondently in 1996, 1998. The HHT is a novel method for adaptive spectral analysis of non-linear and non-stationary signals. The HHT comprises two components: - the Huang Empirical Mode Decomposition (EMD), resulting in an adaptive data-derived basis of Intrinsic Mode functions (IMFs), and the Hilbert Spectral Analysis (HSA1) based on the Hilbert Transform for 1-dimension (1D) applied to the EMD IMF's outcome. Although paper describes the HHT concept in great depth, it does not contain all needed methodology to implement the HHT computer code. In 2004, Semion Kizhner and Karin Blank implemented the reference digital HHT real-time data processing system for 1D (HHT-DPS Version 1.4). The case for 2-Dimension (2D) (HHT2) proved to be difficult due to the computational complexity of EMD for 2D (EMD2) and absence of a suitable Hilbert Transform for 2D spectral analysis (HSA2). The real-time EMD2 and HSA2 comprise the real-time HHT2. Kizhner completed the real-time EMD2 and the HSA2 reference digital implementations respectively in 2013 & 2014. Still, the HHT2 outcome synthesis remains an active research area. This paper presents the initial concepts and preliminary results of HHT2-based synthesis and its application to processing of signals contaminated by Radio-Frequency Interference (RFI), as well as optical systems' fringe detection and mitigation at design stage. The Soil Moisture Active Passive (SMAP mission (SMAP) carries a radiometer instrument that measures Earth soil moisture at L1 frequency (1.4 GHz polarimetric - H, V, 3rd and 4th Stokes parameters). There is abundant RFI at L1 and because soil moisture is a strategic parameter, it is important to be able to recover the RFI-contaminated measurement samples (15% of telemetry). State-of-the-art only allows RFI detection and removes RFI-contaminated measurements. The HHT-based analysis and synthesis facilitates

  6. Festive Nebulas Light Up Milky Way Galaxy Satellite

    NASA Image and Video Library

    2017-09-28

    NASA’s Hubble Space Telescope captured two festive-looking nebulas, situated so as to appear as one. They reside in the Small Magellanic Cloud, a dwarf galaxy that is a satellite of our Milky Way galaxy. Intense radiation from the brilliant central stars is heating hydrogen in each of the nebulas, causing them to glow red. The nebulas, together, are called NGC 248. They were discovered in 1834 by the astronomer Sir John Herschel. NGC 248 is about 60 light-years long and 20 light-years wide. It is among a number of glowing hydrogen nebulas in the dwarf satellite galaxy, which is located approximately 200,000 light-years away in the southern constellation Tucana. The image is part of a study called Small Magellanic Cloud Investigation of Dust and Gas Evolution (SMIDGE). Astronomers are using Hubble to probe the Milky Way satellite to understand how dust is different in galaxies that have a far lower supply of heavy elements needed to create dust. The Small Magellanic Cloud has between a fifth and a tenth of the amount of heavy elements that the Milky Way does. Because it is so close, astronomers can study its dust in great detail, and learn about what dust was like earlier in the history of the universe. “It is important for understanding the history of our own galaxy, too,” explained the study’s principal investigator, Dr. Karin Sandstrom of the University of California, San Diego. Most of the star formation happened earlier in the universe, at a time where there was a much lower percentage of heavy elements than there is now. “Dust is a really critical part of how a galaxy works, how it forms stars,” said Sandstrom. Credit: NASA, ESA, STScI, K. Sandstrom (University of California, San Diego), and the SMIDGE team NASA image use policy. NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments

  7. Defining the Flora Family: Orbital properties, reflectance properties and age

    NASA Astrophysics Data System (ADS)

    Dykhuis, Melissa J.; Molnar, Lawrence; Van Kooten, Samuel J.; Greenberg, Richard

    2014-11-01

    The Flora family resides in the densely populated inner main belt, bounded in semimajor axis by the ν6 secular resonance and the Jupiter 3:1 mean motion resonance. The presence of several large families that overlap dynamically with the Floras (e.g., the Vesta, Baptistina, and Nysa-Polana families), and the removal of a significant fraction of Floras via the nearby ν6 resonance complicates the Flora family's distinction in both proper orbital elements and reflectance properties. Here we use orbital information from the Asteroids Dynamic Site (AstDyS), color information from the Sloan Digital Sky Survey (SDSS), and albedo information from the Wide-field Infrared Survey Explorer (WISE) to obtain the median orbital and reflectance properties of the Floras by sampling the core of the family in multidimensional phase space. We find the median Flora SDSS colors to be a∗ = 0.126 ± 0.007 and i -z =-0.037±0.007 ; the median Flora albedo is pV = 0.291 ± 0.012. These properties allow us to define ranges for the Flora family in orbital and reflectance properties, as required for a detailed dynamical study. We use the young Karin family, for which we have an age determined via direct backward integration of members' orbits, to calibrate the Yarkovsky drift rates for the Flora family without having to estimate the Floras' material properties. The size-dependent dispersion of the Flora members in semimajor axis (the "V" plot) then yields an age for the family of 950-170+200 My, with the uncertainty dominated by the uncertainty in the material properties of the family members (e.g., density and surface thermal properties). We discuss the effects on our age estimate of two independent processes that both introduce obliquity variations among the family members on short (My) timescales: (1) the capture of Flora members in spin-orbit resonance, and (2) YORP-driven obliquity variation through YORP cycles. Accounting for these effects does not significantly change this age

  8. Yarkovsky V-shape identification of asteroid families

    NASA Astrophysics Data System (ADS)

    Bolin, Bryce T.; Delbo, Marco; Morbidelli, Alessandro; Walsh, Kevin J.

    2017-01-01

    There are only a few known main belt (MB) asteroid families with ages greater than 2 Gyr (Brož et al., 2013; Spoto et al., 2015). Estimates based on the family producing collision rate suggest that the lack of > 2 Gyr-old families may be due to a selection bias in current techniques used to identify families. Family fragments disperse in their orbital elements, semi-major axis, a, eccentricity, e, and inclination, i, due to secular resonances, close encounters with massive asteroids and the non-gravitational Yarkovsky force. This causes the family fragments to be indistinguishable from the background of the main belt making them more difficult to identify with the hierarchical clustering method (HCM) with increasing family age. The discovery of the Eulalia and new Polana families in the inner belt relied on new techniques because Yarkovsky spreading made them too disperse to be identified using the classical HCM. The techniques used to discover the new Polana and Eulalia families are modified here to identify asteroid families by searching for correlations between a and asteroid diameter, D, or absolute magnitude, H. A group of asteroids is identified as a collisional family if its boundary in the a vs. 1/D or a vs. H planes has a characteristic V-shape which is due to the size dependent Yarkovsky spreading. The V-shape boundary is identified with two separate techniques. The first technique identifies a border by measuring a steep drop between the number of objects inside and outside of the border. The second technique identifies the V-shape border by measuring a peak in the number density of objects in a vs. 1/D , H space. Families are identified with just one or both V-shape identifying techniques. The V-shape techniques are demonstrated on the known families of Erigone, Vesta, Koronis, and families difficult to identify by HCM such as Flora, Baptistina, new Polana, Eulalia and Karin. Future applications of the technique, such as in a large scale search for > 2

  9. Biological soil crusts in Chile along the precipitation gradient

    NASA Astrophysics Data System (ADS)

    Samolov, Elena; Glaser, Karin; Baumann, Karen; Leinweber, Peter; Jung, Patrick; Büdel, Burkhard; Mikhailyuk, Tatiana; Karsten, Ulf

    2017-04-01

    Biological soil crusts in Chile along a precipitation gradient Elena Samolov* (1), Karin Glaser (1), Karen Baumann (2), Peter Leinweber (2), Patrick Jung (3), Burkhard Büdel (3), Tatiana Mikhailyuk (4) and Ulf Karsten (1) (1) Institute of Biological Sciences - Applied Ecology and Phycology, University of Rostock, Rostock, Germany, (2) Faculty of Agricultural and Environmental Sciences - Soil Sciences, University of Rostock, Rostock, Germany (3) University of Kaiserslautern, Kaiserslautern, Germany (4) M.H. Kholodny Institute of Botany, National Academy of Science of Ukraine, Kyiv, Ukraine * elena.samolov@uni-rostock.de Biological soil crusts (BSCs) are an association of different microorganisms and soil particles in the top millimeters of the soil. They are formed by algae, cyanobacteria, microfungi, bacteria, bryophytes and lichens in various compositions; together with their by-products they create a micro-ecosystem that performs important ecological functions, e.g. primary production, nitrogen fixation, mineralization and stabilization of soils. These top-soil assemblages are almost unstudied in South America (Büdel et al. 2016). Therefore, our aim is to investigate for the first time biodiversity of the key photosynthetic organisms, green algae and cyanobacteria following a precipitation gradient along the west coast of Chile. We are applying polyphasic approach - a combination of microscopy, culture dependent (16S and 18S rRNA, ITS) and culture independent molecular techniques (NGS). First results, based on culturing and light microscopy, showed high diversity of eukaryotic algae in biocrusts from humid regions, followed by semi-arid regions. Lichen dominated biocrusts from arid regions were characterized by a high diversity of green algae, while cyanobacteria were scarcely present. The functional role of the BSCs in the biogeochemical cycle of phosphorous (P) was evaluated using state of the art analytical methods including 31P-NMR (nuclear magnetic

  10. Sustainable Seas Student Intertidal Monitoring Project at Duxbury Reef in Bolinas, CA (Invited)

    NASA Astrophysics Data System (ADS)

    Soave, K.; Dean, A.; Darakananda, K.; Ball, O.; Butti, C.; Yang, G.; Vetter, M.; Grimaldi, Z.

    2009-12-01

    Sustainable Seas Student Intertidal Monitoring Project at Duxbury Reef in Bolinas, CA Kathy Soave, Amy Dean, Olivia Ball, Karin Darakananda, Matt Vetter, Grant Yang, Charlotte Butti, Zoe Grimaldi The Sustainable Seas Student Monitoring Project at the Branson School in Ross, CA has monitored Duxbury Reef in Bolinas, CA since 1999, in cooperation with the Farallones Marine Sanctuary Association and the Gulf of Farallones National Marine Sanctuary. Goals of the project include: 1) To monitor the rocky intertidal habitat and develop a baseline database of invertebrates and algal density and abundance; 2) To contribute to the conservation of the rocky intertidal habitat through education of students and visitors about intertidal species and the requirements for maintaining a healthy, diverse intertidal ecosystem; 3) To increase stewardship in the Gulf of the Farallones National Marine Sanctuary; and 4) To contribute abundance and population data on key algae and invertebrate species to the national database, LiMPETS (Long Term Monitoring Program & Experiential Training for Students). Student volunteers complete an intensive training course on the natural history of intertidal invertebrates and algae, identification of key species, rocky intertidal monitoring techniques, and history of the sanctuary. Students identify and count key invertebrate and algae species along two permanent transects (A and B) and using randomly determined points within a permanent 100 m2 area, three times per year (fall, winter, and late spring). Using the data collected since 2004, we will analyze the population densities, seasonal abundance and long-term population trends of key algal and invertebrate species. Future analyses and investigations will include intertidal abiotic factors (including water temperature and human foot-traffic) to enhance insights into the workings of the Duxbury Reef ecosystem, in particular, the high intertidal zone which experiences the greatest amount of human

  11. Ridge interaction features of the Line Islands

    NASA Astrophysics Data System (ADS)

    Konter, J. G.; Koppers, A. A. P.; Storm, L. P.

    2016-12-01

    The sections of Pacific absolute plate motion history that precede the Hawaii-Emperor and Louisville chains are based on three chains: the Line Islands-Mid-Pacific Mountains, the Hess Rise-Shatsky Rise, and the Marshall Islands-Wake Islands (Rurutu hotspot). Although it has been clear that the Line Islands do not define a simple age progression (e.g. Schlanger et al., 1984), the apparent similarity to the Emperor Seamount geographic trend has been used to extend the overall Hawaii-Emperor track further into the past. However, we show here that plate tectonic reconstructions suggest that the Mid-Pacific Mountains (MPMs) and Line Islands (LIs) were erupted near a mid-ocean ridge, and thus these structures do not reflect absolute plate motion. Moverover, the morphology and geochemistry of the volcanoes show similarities with Pukapuka Ridge (e.g. Davis et al., 2002) and the Rano Rahi seamounts, presumed to have a shallow origin. Modern 40Ar/39Ar ages show that the LIs erupted at various times along the entire volcanic chain. The oldest structures formed within 10 Ma of plate formation. Given the short distance to the ridge system, large aseismic volcanic ridges, such as Necker Ridge and Horizon Guyot may simply reflect a connection between MPMs and the ridge, similar to the Pukapuka Ridge. The Line Islands to the south (including Karin Ridge) define short subchains of elongated seamounts that are widespread, resembling the Rano Rahi seamount field. During this time, the plate moved nearly parallel to the ridge system. The change from few large ridges to many subchains may reflect a change in absolute plate motion, similar to the Rano Rahi field. Here, significant MPMs volcanism is no longer connected to the ridge along plate motion. Similar to Pukapuka vs. Rano Rahi, the difference in direction between plate motion and the closest ridge determines whether larger ridges or smaller seamount subchains are formed. The difference between the largest structures (MPMs and LIs

  12. Cell surface expression of HIP, a novel heparin/heparan sulfate binding protein, of human uterine epithelial cells and cell lines.

    PubMed

    Rohde, L H; Julian, J; Babaknia, A; Carson, D D

    1996-05-17

    Previous studies established that uterine epithelial cells and cell lines express cell surface heparin/heparan sulfate (HP/HS)-binding proteins (Wilson, O., Jacobs, A. L., Stewart, S., and Carson, D. D. (1990) J. Cell. Physiol. 143, 60-67; Raboudi, N., Julian, J., Rohde, L. H., and Carson, D. D. (1992) J. Biol. Chem. 267, 11930-11939). The accompanying paper (Liu, S., Smith, S. E., Julian, J., Rohde, L. H., Karin, N. J., and Carson, D. D. (1996) J. Biol. Chem. 271, 11817-11823) describes the cloning of a full-length cDNA corresponding to a candidate cell surface HP/HS interacting protein, HIP, expressed by a variety of human epithelia. A synthetic peptide was synthesized corresponding to an amino acid sequence predicted from the cDNA sequence and used to prepare a rabbit polyclonal antibody. This antibody reacted with a protein with an apparent Mr of 24,000 by SDS-polyacrylamide gel electrophoresis that was highly enriched in the 100,000 x g particulate fraction of RL95 cells. This molecular weight is similar to that of the protein expressed by 3T3 cells transfected with HIP cDNA. HIP was solubilized from this particulate fraction with NaCl concentrations > or = 0.8 M demonstrating a peripheral association consistent with the lack of a membrane spanning domain in the predicted cDNA sequence. HIP was not released by heparinase digestion suggesting that the association is not via membrane-bound HS proteoglycans. NaCl-solubilized HIP bound to heparin-agarose in physiological saline and eluted with NaCl concentrations of 0.75 M and above. Furthermore, incubation of 125I-HP with transblots of the NaCl-solubilized HIP preparations separated by two-dimensional gel electrophoresis demonstrated direct binding of HP to HIP. Indirect immunofluorescence studies demonstrated that HIP is expressed on the surfaces of intact RL95 cells. Binding of HIP antibodies to RL95 cell surfaces at 4 degrees C was saturable and blocked by preincubation with the peptide antigen. Single cell

  13. A peptide sequence of heparin/heparan sulfate (HP/HS)-interacting protein supports selective, high affinity binding of HP/HS and cell attachment.

    PubMed

    Liu, S; Julian, J; Carson, D D

    1998-04-17

    We previously have identified a novel cell surface heparan sulfate/heparin (HS/HP)-interacting protein (HIP) found in human uterine epithelia and a variety of other human epithelial and endothelial cells and cell lines (Liu, S., Smith, S. E., Julian, J., Rohde, L. H., Karin, N. J., and Carson, D. D. (1996) J. Biol. Chem. 271, 11817-11823; Rohde, L. H., Julian, J., Babaknia, A., and Carson, D. D. (1996) J. Biol. Chem. 271, 11824-11830). The amino acid sequence predicted for HIP revealed a potential HS/HP-binding motif. In the present studies, a synthetic peptide corresponding to this putative HS/HP-binding motif, HIP peptide, was synthesized and examined with regard to its HS/HP binding and cell attachment promoting activity. Results using solid phase binding assays demonstrate that HIP peptide binds HS/HP with high selectivity and has high affinity for bulk HP (50% saturation congruent with 300 nM) and even higher affinity for a subset of polysaccharides found in commercial [3H]HP (half-saturation congruent with 10 nM). Moreover, HIP peptide binds subsets of cell and extracellular matrix-associated HS and dermatan sulfate expressed by RL95 cells, a human uterine adenocarcinoma cell line. HIP peptide also binds a similar fraction of HS as well as dermatan sulfate expressed by JAR cells, a human choriocarcinoma cell line. In contrast to binding of cell- or extracellular matrix-associated HS, HIP peptide does not bind secreted or released forms of HS or DS from either RL95 or JAR cells to a significant extent. HS species that bind to HIP peptide are generally larger, have a higher negative charge density, and have a larger proportion of di- and trisulfated disaccharide units than HS species that do not bind to HIP peptide, demonstrating structural differences among these polysaccharides. This same peptide supports HS-dependent JAR cell attachment. Collectively, these data demonstrate that a linear peptide sequence found within HIP can account, at least in part, for

  14. Heparin/heparan sulfate (HP/HS) interacting protein (HIP) supports cell attachment and selective, high affinity binding of HP/HS.

    PubMed

    Liu, S; Hoke, D; Julian, J; Carson, D D

    1997-10-10

    Heparin/heparan sulfate (HP/HS), HS proteoglycans, and their binding proteins play important roles in a variety of biological processes. Previously, we identified a novel cell surface HP/HS interacting protein (HIP) from human uterine epithelia and a variety of other human epithelial and endothelial cells and cell lines (Liu, S., Smith, S. E., Julian, J., Rohde, L. H., Karin, N. J., and Carson, D. D. (1996) J. Biol. Chem. 271, 11817-11823; Rohde, L. H., Julian, J., Babaknia, A., and Carson, D. D. (1996) J. Biol. Chem. 271, 11824-11830). In the current studies, we have purified and characterized HIP from HEC cells, a human uterine epithelial cell line, as well as recombinant HIP from a bacterial expression system. HIP supports attachment of the human trophoblastic cell line, JAR, in a HS-dependent fashion. Predigestion of JAR cells with a mixture of heparitinases, but not chondroitinase AC, abolished cell attachment to HIP. In addition, JAR cell attachment to HIP is highly sensitive to HP inhibition and much more selective for HP/HS than other glycosaminoglycans. Dermatan sulfate displays partial inhibitory activity as well, consistent with the observation that chondroitinase ABC digestion partially reduces JAR cell attachment to HIP. Solid-phase binding assays indicate HIP binds [3H]HP with high affinity (apparent KD = 8 nM). Furthermore, HIP bound cell surface/extracellular matrix-associated HS, expressed by RL95 cells, a human uterine epithelial cell line. Anti-HIP antibody generated against a synthetic peptide derived from a putative HP/HS-binding motif resident within HIP inhibited about half of [3H]HP binding to HIP, indicating that this domain is a functional HP-binding domain of HIP. Similarly, this same synthetic peptide motif of HIP could block about 50% of [3H]HP binding to HIP; however, this peptide almost completely inhibited cell attachment to HIP, suggesting a critical role, in this regard. Collectively, these results suggest that HIP can function as

  15. Where and in What Quantity Are Lakes Observable by SWOT?

    NASA Astrophysics Data System (ADS)

    Sheng, Y.; Song, C.; Lettenmaier, D. P.; Ke, L.

    2016-12-01

    The SWOT mission's scientific requirements state that SWOT should provide a global inventory of terrestrial surface water bodies whose surface area exceeds 250x250 m2. However, our knowledge about locations and quantities of SWOT-observable lakes is rather limited. This research intends to produce a SWOT-observable lake map using our recently produced global lake database, SWOT orbits, and terrain layover effect simulation based on KaRIn's sensing geometry. The lake database was recently produced using 20,000+ Landsat images (and terrain data) acquired during lake-stable seasons in circa-2000, and captures 8 million lakes larger than 0.5 ha. This product has gone through nearly three-year's intensive quality assurance and quality control procedures, and provides a reliable inventory of global lakes. Based on this detailed database, we have produced a global map of lakes larger than 250x250 m2. We have found that about 28% of global lakes may be captured above this SWOT-targeted minimum size, but covering 94% of total lake area. However, SWOT may miss even more lakes due to its orbit design and SAR layover effects. To the end, SWOT swath coverages are generated from designed SWOT orbits and used to achieve the temporal coverage of these lakes to identify lakes partially or even completely missed by SWOT in gaps between orbits. In addition, terrain-induced layover effects on lakes are included in this study. Since the SWOT/KaRIn sensor will sense the Earth at near-nadir incidence, the SAR layover effects, expected to be serious and ubiquitous, occlude some lakes in relief areas entirely or partially. With all the above factors considered, this study will produce a SWOT-observable lake map and present a report about the impacts of SWOT orbit coverage and layover effects on lake observations, to directly address one of the key questions in the SWOT mission: "where are locations of lakes likely to be observable by SWOT prior to launch?"

  16. Lunar and Planetary Science XXXV: Asteroids, Meteors, Comets

    NASA Technical Reports Server (NTRS)

    2004-01-01

    Reports included:Long Term Stability of Mars Trojans; Horseshoe Asteroids and Quasi-satellites in Earth-like Orbits; Effect of Roughness on Visible Reflectance Spectra of Planetary Surface; SUBARU Spectroscopy of Asteroid (832) Karin; Determining Time Scale of Space Weathering; Change of Asteroid Reflectance Spectra by Space Weathering: Pulse Laser Irradiation on Meteorite Samples; Reflectance Spectra of CM2 Chondrite Mighei Irradiated with Pulsed Laser and Implications for Low-Albedo Asteroids and Martian Moons; Meteorite Porosities and Densities: A Review of Trends in the Data; Small Craters in the Inner Solar System: Primaries or Secondaries or Both?; Generation of an Ordinary-Chondrite Regolith by Repetitive Impact; Asteroid Modal Mineralogy Using Hapke Mixing Models: Validation with HED Meteorites; Particle Size Effect in X-Ray Fluorescence at a Large Phase Angle: Importance on Elemental Analysis of Asteroid Eros (433); An Investigation into Solar Wind Depletion of Sulfur in Troilite; Photometric Behaviour Dependent on Solar Phase Angle and Physical Characteristics of Binary Near-Earth-Asteroid (65803) 1996 GT; Spectroscopic Observations of Asteroid 4 Vesta from 1.9 to 3.5 micron: Evidence of Hydrated and/or Hydroxylated Minerals; Multi-Wavelength Observations of Asteroid 2100 Ra-Shalom: Visible, Infrared, and Thermal Spectroscopy Results; New Peculiarities of Cometary Outburst Activity; Preliminary Shape Modeling for the Asteroid (25143) Itokawa, AMICA of Hayabusa Mission; Scientific Capability of MINERVA Rover in Hayabusa Asteroid Mission; Characteristics and Current Status of Near Infrared Spectrometer for Hayabusa Mission; Sampling Strategy and Curation Plan of Hayabusa Asteroid Sample Return Mission; Visible/Near-Infrared Spectral Properties of MUSES C Target Asteroid 25143 Itokawa; Calibration of the NEAR XRS Solar Monitor; Modeling Mosaic Degradation of X-Ray Measurements of 433 Eros by NEAR-Shoemaker; Scattered Light Remediation and Recalibration of

  17. Obituary: Einar A. Tandberg-Hanssen (1921-2011)

    NASA Astrophysics Data System (ADS)

    Gary, G.; Emslie, A.; Hathaway, David; Moore, Ronald

    2011-12-01

    Dr. Einar Andreas Tandberg-Hanssen was born on 6 August 1921, in Bergen, Norway, and died on July 22, 2011, in Huntsville, AL, USA, due to complications from ALS (Amyotrophic lateral sclerosis, often referred to as Lou Gehrig's disease). His parents were administrator Birger Tandberg-Hanssen (1883-1951) and secretary Antonie "Mona" Meier (1895-1967). He married Erna Rönning (27 October 1921 - 22 November 1994), a nurse, on 22 June 1951. She was the daughter of Captain Einar Rönning (1890-1969) and Borghild Lyshaug (1897-1980). Einar and Erna had two daughters, Else Biesman (and husband Allen of Rapid City, SD, USA) and Karin Brock (and husband Mike of Gulf Shores, AL, USA). At the time of his death Einar had eight grandchildren and eight great-grandchildren. Dr. Tandberg-Hanssen was an internationally-known member of the solar physics community, with over a hundred published scientific papers and several books, including Solar Activity (1967), Solar Prominences (1974), The Physics of Solar Flares (1988) and The Nature of Solar Prominences (1995). Einar grew up in Langesund and Skien, Norway, where he took the qualifying exams at Skien High School in 1941. After the war he studied natural sciences at the University of Oslo and received his undergraduate degree in astronomy in 1950. He worked as a research assistant in the Institute of Theoretical Astrophysics at the University of Oslo for three intervals in the 1950s, interspersed by fellowships at the Institut d'Astrophysique in Paris, Caltech in Pasadena, CA, the High Altitude Observatory in Boulder, CO, and the Cavendish Laboratory in the UK (at the invitation of British radio-astronomer Sir Martin Ryle). He earned a doctorate in astrophysics at the University in Oslo in 1960 with a dissertation titled "An Investigation of the Temperature Conditions in Prominences with a Special Study of the Excitation of Helium." From 1959-61, Tandberg-Hanssen was a professor at the University in Oslo. He then traveled back to

  18. NASA Announces 2009 Astronomy and Astrophysics Fellows

    NASA Astrophysics Data System (ADS)

    2009-02-01

    WASHINGTON -- NASA has selected fellows in three areas of astronomy and astrophysics for its Einstein, Hubble, and Sagan Fellowships. The recipients of this year's post-doctoral fellowships will conduct independent research at institutions around the country. "The new fellows are among the best and brightest young astronomers in the world," said Jon Morse, director of the Astrophysics Division in NASA's Science Mission Directorate in Washington. "They already have contributed significantly to studies of how the universe works, the origin of our cosmos and whether we are alone in the cosmos. The fellowships will serve as a springboard for scientific leadership in the years to come, and as an inspiration for the next generation of students and early career researchers." Each fellowship provides support to the awardees for three years. The fellows may pursue their research at any host university or research center of their choosing in the United States. The new fellows will begin their programs in the fall of 2009. "I cannot tell you how much I am looking forward to spending the next few years conducting research in the U.S., thanks to the fellowships," said Karin Oberg, a graduate student in Leiden, The Netherlands. Oberg will study the evolution of water and ices during star formation when she starts her fellowship at the Smithsonian Astrophysical Observatory in Cambridge, Mass. People Who Read This Also Read... Milky Way's Super-efficient Particle Accelerators Caught in The Act Cosmic Heavyweights in Free-for-all Galaxies Coming of Age in Cosmic Blobs Cassiopeia A Comes Alive Across Time and Space A diverse group of 32 young scientists will work on a wide variety of projects, such as understanding supernova hydrodynamics, radio transients, neutron stars, galaxy clusters and the intercluster medium, supermassive black holes, their mergers and the associated gravitational waves, dark energy, dark matter and the reionization process. Other research topics include

  19. The Hawaii trails project: comet-hunting in the main asteroid belt

    NASA Astrophysics Data System (ADS)

    Hsieh, H. H.

    2009-10-01

    Context: The mysterious solar system object 133P/(7968) Elst-Pizarro is dynamically asteroidal, yet displays recurrent comet-like dust emission. Two scenarios were hypothesized to explain this unusual behavior: 1) 133P is a classical comet from the outer solar system that has evolved onto a main-belt orbit or 2) 133P is a dynamically ordinary main-belt asteroid on which subsurface ice has recently been exposed. If 1) is correct, the expected rarity of a dynamical transition onto an asteroidal orbit implies that 133P could be alone in the main belt. In contrast, if 2) is correct, other icy main-belt objects should exist and could also exhibit cometary activity. Aims: Believing 133P to be a dynamically ordinary, yet icy main-belt asteroid, I set out to test the primary prediction of the hypothesis: that 133P-like objects should be common and could be found by an appropriately designed observational survey. Methods: I conducted just such a survey - the Hawaii Trails Project - of selected main-belt asteroids in a search for objects displaying cometary activity. Optical observations were made of targets selected from among the Themis, Koronis, and Veritas asteroid families, the Karin asteroid cluster, and low-inclination, kilometer-scale outer-belt asteroids, using the Lulin 1.0 m, small and moderate aperture research telescope system (SMARTS) 1.0 m, University of Hawaii 2.2 m, southern astrophysical research (SOAR) 4.1 m, Gemini North 8.1 m, Subaru 8.2 m, and Keck I 10 m telescopes. Results: I made 657 observations of 599 asteroids, discovering one active object now known as 176P/LINEAR, leading to the identification of the new cometary class of main-belt comets (MBCs). These results suggest that there could be ~100 currently active MBCs among low-inclination, kilometer-scale outer-belt asteroids. Physically and statistically, MBC activity is consistent with initiation by meter-sized impactors. The estimated rate of impacts and sizes of resulting active sites, however

  20. Voluminous low-T granite: fluid present partial melting of the crust?

    NASA Astrophysics Data System (ADS)

    Hand, Martin; Barovich, Karin; Morrissey, Laura; Bockmann, Kiara; Kelsey, David; Williams, Megan

    2017-04-01

    Voluminous low-T granite: fluid present partial melting of the crust? Martin Hand(1), Karin Barovich(1), Laura Morrissey(1), Vicki Lau(1), Kiara Bockmann(1), David Kelsey(1), Megan Williams(1) (1) Department of Earth Sciences, University of Adelaide, Adelaide, Australia Two general schools of thought exist for the formation of granites from predominantly crustal sources. One is that large-scale anatexis occurs via fluid-absent partial melting. This essentially thermal argument is based on the reasonable premise that the lower crust is typically fluid depleted, and experimental evidence which indicates that fluid-absent partial melting can produce significant volumes of melt, creating compositionally depleted residua that many believe are recorded by granulite facies terranes. The other school of thought is that large-scale anatexis can occur via fluid-fluxed melting. This essentially compositional-based contention is also supported by experimental evidence which shows that fluid-fluxed melting is efficient, including at temperatures not much above the solidus. However, generating significant volumes of melt at low temperatures requires a large reservoir of fluid. If fluid-fluxed melting is a realistic model, the resultant granites should be comparatively low temperature compared to those derived from predominantly fluid-absent partial melting. Using a voluminous suite of aluminous granites in the Aileron Province in the North Australian Craton together with metasedimentary granulites as models for source behaviour, we evaluate fluid-absent verse fluid-present regimes for generating large volumes of crustally-derived melt. The central Aileron Province granites occupy 32,500km2, and in places are in excess of 8 km thick. They are characterised by abundant zircon inheritance that can be matched with metasedimentary successions in the region, suggesting they were derived in large part from melting of crust similar to that presently exposed. A notable feature of many of

  1. Preface: SQM2006

    NASA Astrophysics Data System (ADS)

    Barish, Kenneth; Zhong Huang, Huan; Kapusta, Joseph; Odyniec, Grazyna; Rafelski, Johann; Whitten, Charles A., Jr.

    2006-12-01

    served as conference coordinator. She and her crew organized all the conference activities and she has been essential for the success of the conference. Staff members from UCLA, Vahe Ghazikhanian, Stephen Trentalange, Mauro Leonardo, Josephine Morrell, Friedel Adler, Tuyet-Hong Truong-Ung, Leticia Cabeza, Karin Nachtigal, Martin Simon, Dylan Thein, Lingyu Xu and Craig Reaves, and graduate students Jingguo Ma, Johan Gonzalez, Xiaoyan Lin, Priscilla Kurnadi and David Staszak, also provided essential support for the conference. We wish to thank Tony Chan, Dean of Physical Sciences at UCLA, Lawrence Berkeley National Laboratory, Brookhaven National Laboratory and the UCLA Department of Physics and Astronomy for financial support of the conference. Their sponsorship allowed many graduate students and junior physicists to attend the conference. We also thank the SQM2006 International Advisory Committee for their valuable input to the scientific programme and conference arrangement.

  2. Unravelling the Mystery of Massive Star Birth - All Stars are Born the Same Way

    NASA Astrophysics Data System (ADS)

    2010-07-01

    of a screw on the International Space Station, or more than ten times the resolution possible with current visible-light telescopes in space. With this unique capability, complemented by observations done with another of ESO's telescopes, the 3.58-metre New Technology Telescope at La Silla, Kraus and colleagues were able to detect a disc around IRAS 13481-6124. "This is the first time we could image the inner regions of the disc around a massive young star", says Kraus. "Our observations show that formation works the same for all stars, regardless of mass." The astronomers conclude that the system is about 60 000 years old, and that the star has reached its final mass. Because of the intense light of the star - 30 000 times more luminous than our Sun - the disc will soon start to evaporate. The flared disc extends to about 130 times the Earth-Sun distance - or 130 astronomical units (AU) - and has a mass similar to that of the star, roughly twenty times the Sun. In addition, the inner parts of the disc are shown to be devoid of dust. "Further observations with the Atacama Large Millimeter/submillimeter Array (ALMA), currently being constructed in Chile, could provide much information on these inner parts, and allow us to better understand how baby massive stars became heavy," concludes Kraus. More information This research was presented in a paper to appear in this week issue of Nature ("A hot compact dust disk around a massive young stellar object", by S. Kraus et al.). The team is composed of Stefan Kraus (University of Michigan, USA), Karl-Heinz Hofmann, Karl M. Menten, Dieter Schertl, Gerd Weigelt, Friedrich Wyrowski, and Anthony Meilland (Max-Planck-Institut für Radioastronomie, Bonn, Germany),Karine Perraut (Laboratoire d'Astrophysique de Grenoble, France), Romain Petrov and Sylvie Robbe-Dubois (Université de Nice Sophia-Antipolis/CNRS/Observatoire de la Côte d'Azur, France), Peter Schilke (Universität zu Köln, Germany), and Leonardo Testi (ESO).

  3. VLBA Changes Picture of Famous Star-Forming Region

    NASA Astrophysics Data System (ADS)

    2007-10-01

    Using the supersharp radio "vision" of the National Science Foundation's Very Long Baseline Array (VLBA), astronomers have made the most precise measurement ever of the distance to a famous star-forming region. The measurement -- to the heavily studied Orion Nebula -- changes scientists' understanding of the characteristics of the young stars in the region. Parallax Diagram Trigonometric Parallax method determines distance to star by measuring its slight shift in apparent position as seen from opposite ends of Earth's orbit. CREDIT: Bill Saxton, NRAO/AUI/NSF Star Track Apparent track of star GMR A in the Orion Nebula Cluster, showing shift caused by Earth's orbital motion and star's movement in space. CREDIT: Sandstrom et al., NRAO/AUI/NSF Click on Images for Larger Files "This measurement is four times more precise than previous distance estimates. Because our measurement reduces the distance to this region, it tells us that the stars there are less bright than thought before, and changes the estimates of their ages," said Geoff Bower, an astronomer at the University of California at Berkeley. Bower, along with Karin Sandstrom, J.E.G. Peek, Alberto Bolatto and Richard Plambeck, all of Berkeley, published their findings in the October 10 edition of the Astrophysical Journal. The scientists determined the distance to a star called GMR A, one of a cluster of stars in the Orion Nebula, by measuring the slight shift in the star's apparent position in the sky caused by the Earth's motion around the Sun. Observing the star when the Earth is on opposite sides of its annual orbit allows astronomers to measure the angle of this small shift and thus provides a direct trigonometric calculation of its distance. "By using this technique, called parallax, we get a direct measurement that does not depend on various assumptions that are required to use less-direct methods," Bower said. "Only a telescope with the remarkable ability to see fine detail that is provided by the VLBA is

  4. Book Review: Beitraege zur Astronomiegeschichte, Band 5 (Acta Historica Astronomiae Vol. 15)

    NASA Astrophysics Data System (ADS)

    Duerbeck, H. W.; Dick, W. R.; Hamel, J.

    2002-12-01

    Pisa and the librarian Pozzetti at Bologna, and Karin Reich describes and edits Bessel's book critique of Gauss' Theoria Motus. How many one-time astronomers have to earn their living in other ways, become distracted from astronomical research, and vanish from the horizon of astronomical history? In the ninth paper, Hans-Joachim Ilgauds has traced the life of Georg Koch (1851-1905), who started his career as an astronomer at Leipzig Observatory in 1874. Later Koch worked at Hamburg Observatory, and then became an employee at the statistical office in Kiel, and finally director of the statistical office of the Hamburg revenue service. He was a collaborator for the statistical yearbook of German cities, and also contributed to a book investigating the causes and the impact of the cholera epidemic of 1892 in Hamburg. The last two papers deal with the circumstances of the discovery of the first Near-Earth asteroid (433) Eros. It was recorded on photographic plates taken at the Urania-Sternwarte Berlin and at Nice Observatory. The Berlin observer Witt announced the discovery, and only later, the Nice observer Charlois published a position of Eros. While all plates have disappeared, the authors Hans Scholl and Lutz D. Schmadel could prove that the Nice plate was poorly guided and Charlois would have been unable to discover the object. From a copy of the Berlin plate, published 50 years after the discovery by Witt's co-observer F. Linke, the exact position was determined, and the time of observation (which had not been published) was derived. The second article, by Lutz D. Schmadel, deals with the life of the Eros co-discoverer Felix Linke (1879-1959), who later worked in statistic offices, was a frequent writer of popular scientific articles, and later the editor of a journal, "Technik im Hotel'', and author of a book of the same title. As can be seen from the summaries given above, this collection of essays deals mainly with historical events that occurred in Germany and

  5. a Passage to the Universe

    NASA Astrophysics Data System (ADS)

    1995-11-01

    a concluding Press Conference , during which the outcome of this unique event will be summarized by the participants and the organisers: Monday, November 20, 1995, 15:30 pm, at the ESO Headquarters, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany List of National First-Prize Winners Belgium: Mr. Freddy Allemeersch (Teacher), Mr. Pieter De Ceuninck, Mr. Jeroen Staelens (Onze-Lieve-Vrouwecollege, Brugge) Denmark: Mr. Joern C. Olsen, Mr. Henrik Struckmann, Mr. Uffe A. Hansen, Mr. Mogens Winther (Teacher) (Soenderborg Amtsgymnasium) Finland: Mr. Reima Eresmaa, Ms. Laura Elina Nykyri, Ms. Reetamaija Janhonen (Cygnaeues-Lukeo, Jyvaeskylae and Jyvaeskylaen Lyseon Lukeo) France: Mr. Rene Cavaroz (Teacher), Mr. Vincent Hardy, Mr. Antoine Lesuffleur (Lycee Chartier, Bayeux) Germany: Ms. Dorothee Barth, Mr. Walter Czech (Teacher), Mr. Uwe Kranz, Ms. Karin Wieland (Immanuel-Kant-Gymnasium, Leinfelden-Echterdingen, Baden-Wuerttemberg) Greece: Ms. Agni Ioannidi, Ms. Elena Katifori, Mr. Vassilis Samiotis, Mr. Vassillos Tzotzes (Teacher) (Second Varvakelo Experimental Lyceum, Athens) Ireland: Mr. Declan Maccuarta (Teacher), Mr. Colm Mcloughlin (St. Peter's College, Wexford, Co. Wexford) Italy: Mr. Pasquale Ciarletta, Ms. Francesca D'elia, Ms. Ada Fortugna (Teacher), Mr. Alfredo Pudano (Liceo Scientifico `Leonardo da Vinci', Reggio Calabria) The Netherlands: Mr. Alex De Beer, Mr. Klaas Huijbregts, Mr. Ruud Nellen (Norbertuscollege, Rosendaal) Spain: Mr. Aritz Atela Aio, Mr. Julen Sarasola Manich (Teacher), Mr. Jon Huertas Rodriquez (Txorierri Batxilergoko Institua, Derio Bizkaia) Sweden: Mr. Rahman Amanullah, Mr. Kjell L. Bonander (Teacher), Mr. Tomas Oppelstrup, Ms. Christin Wiedemann (Saltsjoebadens Samskola, Saltsjoebaden) United Kingdom: Mr. Michael Ching, Dr. Richard Field (Teacher) (Oundle School, Peterborough) National Committees Further information about the national contests may be obtained from the National Committees: Belgium: Dr. C. Sterken, Vrije Universiteit

  6. Congratulations to Carey King

    NASA Astrophysics Data System (ADS)

    Hall, Charles A. S.

    2012-03-01

    importance of these more comprehensive EROIs but we do understand that our usual methods of including only energy used directly (e.g. to run a pump) or indirectly (e.g. to manufacture the steel forms used) greatly underestimates the total amount of energy needed to produce energy. In conclusion, Carey King appears to be one of the real rising energy stars as energy becomes again much more important. He is very bright, original and is a very hard worker. I look forward to much exciting, innovative and important work from his endeavors. References Barnett H and Morse C 1963 Scarcity and Growth: The Economics of Natural Resource Availability (Baltimore, MD: Johns Hopkins Press) Cleveland C J, Costanza R, Hall C A S and Kaufmann R 1984 Energy and the United States economy: a biophysical perspective Science 225 890-7 Denison E F 1989 Estimates of Productivity Change by Industry, an Evaluation and an Alternative (Washington, DC: The Brookings Institution) Hall C A S 1972 Migration and metabolism in a temperate stream ecosystem Ecology 53 585-604 Hall C A S and Cleveland C J 1981 Petroleum drilling and production in the United States: yield per effort and net energy analysis Science 211 576-9 Hall C A S and Klitgaard K 2011 Energy and the Wealth of Nations: Understanding the Biophysical Economy (New York: Springer) Kaufmann R 2004 The mechanisms for autonomous energy efficiency increases: a cointegration analysis of the US Energy/GDP Ratio The Energy Journal 25 63-86 King C W 2010 Energy intensity ratios as net energy measures of United States energy production and expenditures Environ. Res. Lett. 5 044006 Murphy D J and Hall C A S 2011 Energy return on investment, peak oil, and the end of economic growth in 'Ecological Economics Reviews' ed Robert Costanza, Karin Limburg and Ida Kubiszewski Ann. N.Y. Acad. Sci. 1219 52-72 Solow R M 1974 The economics of resources or the resources of economics American Economic Review 66 1-14 Odum H T 1973 Environment, Power and Society (New York

  7. Young Astronomers' Observe with ESO Telescopes

    NASA Astrophysics Data System (ADS)

    1995-11-01

    project concerned the actual construction of a working solar radio interferometer, a rather complex instrument that allows measurements of the long-wavelength radiation from the Sun and to map the locations in the solar corona where this radiation originates. The antennae and receiver were designed for frequences around 550 and 750 MHz and were built by the team members themselves. Radio signals from the Sun (as interference fringes) were effectively observed with this instrument, documenting the excellent functioning of this advanced equipment. Germany: Ms. Dorothee Barth, Mr. Walter Czech (Teacher), Mr. Uwe Kranz, Ms. Karin Wieland (Immanuel-Kant-Gymnasium, Leinfelden-Echterdingen, Baden-Wurttemberg) Following a careful planning phase, systematic observations of the 14-magnitude planet Pluto were made with a CCD camera and a 30-cm telescope during 18 nights in the spring and summer of this year. Five nearby stars were used to calibrate the resulting photometric measurements. In the end, this programme was shown to achieve a very good photometric accuracy of about +- 0.2 magnitude per measurement. The variation of Pluto's brightness was found to be about 0.7 magnitude for this particular instrumental combination (no filtre). It was thus possible to draw the lightcurve which was found to be in complete agreement with the established 6.4 day rotation period. Greece: Ms. Agni Ioannidi, Ms. Elena Katifori, Mr. Vassilis Samiotis, Mr. Vassillos Tzotzes (Teacher) (Varvakio Experimental Lyceum, Athens) The project starts out from a star of 1.56 solar mass and a certain density. From this, its size, luminosity, temperature, pressure and other parameters are calculated. With an analogue to the Titius-Bode law for planetary distances, a new planetary system is constructed. It has 5 planets, 3 of which are of the terrestrial type and the other 2 are giant gas planets, larger than Jupiter. Their physical characteristics are calculated. One planet (the 3rd from the central star) is