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  • 1
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    Magnetic Resonance Properties of Gd(III)-Bound Lipid-Coated Microbubbles and their Cavitation Fragments (2012)
    American Chemical Society (ACS)
    In: Langmuir
    Details
    Publication Date: 2012-10-18
    Description: Langmuir DOI: 10.1021/la303283y
    Print ISSN: 0743-7463
    Electronic ISSN: 1520-5827
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 2
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    Kepler planet-detection mission: introduction and first results (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-09
    Description: The Kepler mission was designed to determine the frequency of Earth-sized planets in and near the habitable zone of Sun-like stars. The habitable zone is the region where planetary temperatures are suitable for water to exist on a planet's surface. During the first 6 weeks of observations, Kepler monitored 156,000 stars, and five new exoplanets with sizes between 0.37 and 1.6 Jupiter radii and orbital periods from 3.2 to 4.9 days were discovered. The density of the Neptune-sized Kepler-4b is similar to that of Neptune and GJ 436b, even though the irradiation level is 800,000 times higher. Kepler-7b is one of the lowest-density planets (approximately 0.17 gram per cubic centimeter) yet detected. Kepler-5b, -6b, and -8b confirm the existence of planets with densities lower than those predicted for gas giant planets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borucki, William J -- Koch, David -- Basri, Gibor -- Batalha, Natalie -- Brown, Timothy -- Caldwell, Douglas -- Caldwell, John -- Christensen-Dalsgaard, Jorgen -- Cochran, William D -- DeVore, Edna -- Dunham, Edward W -- Dupree, Andrea K -- Gautier, Thomas N 3rd -- Geary, John C -- Gilliland, Ronald -- Gould, Alan -- Howell, Steve B -- Jenkins, Jon M -- Kondo, Yoji -- Latham, David W -- Marcy, Geoffrey W -- Meibom, Soren -- Kjeldsen, Hans -- Lissauer, Jack J -- Monet, David G -- Morrison, David -- Sasselov, Dimitar -- Tarter, Jill -- Boss, Alan -- Brownlee, Don -- Owen, Toby -- Buzasi, Derek -- Charbonneau, David -- Doyle, Laurance -- Fortney, Jonathan -- Ford, Eric B -- Holman, Matthew J -- Seager, Sara -- Steffen, Jason H -- Welsh, William F -- Rowe, Jason -- Anderson, Howard -- Buchhave, Lars -- Ciardi, David -- Walkowicz, Lucianne -- Sherry, William -- Horch, Elliott -- Isaacson, Howard -- Everett, Mark E -- Fischer, Debra -- Torres, Guillermo -- Johnson, John Asher -- Endl, Michael -- MacQueen, Phillip -- Bryson, Stephen T -- Dotson, Jessie -- Haas, Michael -- Kolodziejczak, Jeffrey -- Van Cleve, Jeffrey -- Chandrasekaran, Hema -- Twicken, Joseph D -- Quintana, Elisa V -- Clarke, Bruce D -- Allen, Christopher -- Li, Jie -- Wu, Haley -- Tenenbaum, Peter -- Verner, Ekaterina -- Bruhweiler, Frederick -- Barnes, Jason -- Prsa, Andrej -- New York, N.Y. -- Science. 2010 Feb 19;327(5968):977-80. doi: 10.1126/science.1185402. Epub 2010 Jan 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NASA Ames Research Center, Moffett Field, CA 94035, USA. William.J.Borucki@nasa.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20056856" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Kepler-16: a transiting circumbinary planet (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-09-17
    Description: We report the detection of a planet whose orbit surrounds a pair of low-mass stars. Data from the Kepler spacecraft reveal transits of the planet across both stars, in addition to the mutual eclipses of the stars, giving precise constraints on the absolute dimensions of all three bodies. The planet is comparable to Saturn in mass and size and is on a nearly circular 229-day orbit around its two parent stars. The eclipsing stars are 20 and 69% as massive as the Sun and have an eccentric 41-day orbit. The motions of all three bodies are confined to within 0.5 degrees of a single plane, suggesting that the planet formed within a circumbinary disk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doyle, Laurance R -- Carter, Joshua A -- Fabrycky, Daniel C -- Slawson, Robert W -- Howell, Steve B -- Winn, Joshua N -- Orosz, Jerome A -- Prsa, Andrej -- Welsh, William F -- Quinn, Samuel N -- Latham, David -- Torres, Guillermo -- Buchhave, Lars A -- Marcy, Geoffrey W -- Fortney, Jonathan J -- Shporer, Avi -- Ford, Eric B -- Lissauer, Jack J -- Ragozzine, Darin -- Rucker, Michael -- Batalha, Natalie -- Jenkins, Jon M -- Borucki, William J -- Koch, David -- Middour, Christopher K -- Hall, Jennifer R -- McCauliff, Sean -- Fanelli, Michael N -- Quintana, Elisa V -- Holman, Matthew J -- Caldwell, Douglas A -- Still, Martin -- Stefanik, Robert P -- Brown, Warren R -- Esquerdo, Gilbert A -- Tang, Sumin -- Furesz, Gabor -- Geary, John C -- Berlind, Perry -- Calkins, Michael L -- Short, Donald R -- Steffen, Jason H -- Sasselov, Dimitar -- Dunham, Edward W -- Cochran, William D -- Boss, Alan -- Haas, Michael R -- Buzasi, Derek -- Fischer, Debra -- New York, N.Y. -- Science. 2011 Sep 16;333(6049):1602-6. doi: 10.1126/science.1210923.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Carl Sagan Center for the Study of Life in the Universe, SETI Institute, 189 Bernardo Avenue, Mountain View, CA 94043, USA. ldoyle@seti.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21921192" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Kepler-62: a five-planet system with planets of 1.4 and 1.6 Earth radii in the habitable zone (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-04-20
    Description: We present the detection of five planets--Kepler-62b, c, d, e, and f--of size 1.31, 0.54, 1.95, 1.61 and 1.41 Earth radii (R plus sign in circle), orbiting a K2V star at periods of 5.7, 12.4, 18.2, 122.4, and 267.3 days, respectively. The outermost planets, Kepler-62e and -62f, are super-Earth-size (1.25 R plus sign in circle 〈 planet radius 〈/= 2.0 R plus sign in circle) planets in the habitable zone of their host star, respectively receiving 1.2 +/- 0.2 times and 0.41 +/- 0.05 times the solar flux at Earth's orbit. Theoretical models of Kepler-62e and -62f for a stellar age of ~7 billion years suggest that both planets could be solid, either with a rocky composition or composed of mostly solid water in their bulk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borucki, William J -- Agol, Eric -- Fressin, Francois -- Kaltenegger, Lisa -- Rowe, Jason -- Isaacson, Howard -- Fischer, Debra -- Batalha, Natalie -- Lissauer, Jack J -- Marcy, Geoffrey W -- Fabrycky, Daniel -- Desert, Jean-Michel -- Bryson, Stephen T -- Barclay, Thomas -- Bastien, Fabienne -- Boss, Alan -- Brugamyer, Erik -- Buchhave, Lars A -- Burke, Chris -- Caldwell, Douglas A -- Carter, Josh -- Charbonneau, David -- Crepp, Justin R -- Christensen-Dalsgaard, Jorgen -- Christiansen, Jessie L -- Ciardi, David -- Cochran, William D -- DeVore, Edna -- Doyle, Laurance -- Dupree, Andrea K -- Endl, Michael -- Everett, Mark E -- Ford, Eric B -- Fortney, Jonathan -- Gautier, Thomas N 3rd -- Geary, John C -- Gould, Alan -- Haas, Michael -- Henze, Christopher -- Howard, Andrew W -- Howell, Steve B -- Huber, Daniel -- Jenkins, Jon M -- Kjeldsen, Hans -- Kolbl, Rea -- Kolodziejczak, Jeffery -- Latham, David W -- Lee, Brian L -- Lopez, Eric -- Mullally, Fergal -- Orosz, Jerome A -- Prsa, Andrej -- Quintana, Elisa V -- Sanchis-Ojeda, Roberto -- Sasselov, Dimitar -- Seader, Shawn -- Shporer, Avi -- Steffen, Jason H -- Still, Martin -- Tenenbaum, Peter -- Thompson, Susan E -- Torres, Guillermo -- Twicken, Joseph D -- Welsh, William F -- Winn, Joshua N -- New York, N.Y. -- Science. 2013 May 3;340(6132):587-90. doi: 10.1126/science.1234702. Epub 2013 Apr 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NASA Ames Research Center, Moffett Field, CA 94035, USA. william.j.borucki@nasa.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23599262" target="_blank"〉PubMed〈/a〉
    Keywords: Exobiology ; Extraterrestrial Environment ; Models, Theoretical ; *Planets ; Stars, Celestial ; *Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Author Correction: Large T 1 contrast enhancement using superparamagnetic nanoparticles in ultra-low field MRI (2018)
    Springer Nature
    Details
    Publication Date: 2018-09-01
    Description: Author Correction: Large T 1 contrast enhancement using superparamagnetic nanoparticles in ultra-low field MRI Author Correction: Large T〈sub〉1〈/sub〉 contrast enhancement using superparamagnetic nanoparticles in ultra-low field MRI, Published online: 31 August 2018; doi:10.1038/s41598-018-31702-0 Author Correction: Large T 1 contrast enhancement using superparamagnetic nanoparticles in ultra-low field MRI
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of rotation on the hydrodynamics of stellar collapse (1980)
    Springer
    Space science reviews 27 (1980), S. 555-561 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Using values of d, γmin, and γmax that Van Riper (1978) has found most promising for a hydrodynamic envelope ejection, we have shown that even a small amount of rotation in the initial core can stop its collapse before nuclear densities are reached. We expected χi 〉 0.02 to produce significant deviations from a spherically symmetric collapse, but have found that χi as much as ten times smaller than this will not allow the core to reach densities as high as in the spherical collapse. In no case, however, does the core flatten very much, nor does the value of β become very large. Low final β's preclude the formation of an axisymmetric torus. They also indicate that deformation of an iron core into a triaxial configuration or fragmentation of the core during its collapse is an extremely unlikely event. (Note: Classically, β must exceed 0.27 before a dynamic instability to non-axisymmetric perturbations is encountered.) The small degree of flattening of the core also suggests that the reduced moment of inertia I of the core will always be relatively small in magnitude and hence that the third time derivative of I, which is proportional to the energy emitted in gravity wave radiation, will not be very significant. Numerically calculated estimates of I- during some of these model evolutions supports this suspicion. If the γmin and used here are found to be realistic values after the detailed physics of the core collapse is well understood, it is clear that gravitational radiation from a core collapse will be difficult to measure. Finally, we should point out that it is the relatively large values of Ymin (near 4/3) combined with values of d near unity that (a) prevented the core from flattening significantly in these models and (b) prevented the core from reaching high β configurations. If “realistic” values of either one (or both) of these parameters are found to be much smaller in more complete models of the core collapse, then the core will have to become flatter (and denser) before pressure gradients will support it along the rotation axis. All of the conclusions drawn here would be modified accordingly under those circumstances. It should also be noted that in general relativistic models, the critical Γ for spherical collapse is somewhat larger than 4/3 (Van Riper, 1979). Therefore, we predict that when fully general relativistic core collapses are performed including rotation, a given choice of γmin and βi will produce a slightly flatter and slightly denser core than the corresponding model that has been presented here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00168349
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  • 7
    Electronic Resource
    Electronic Resource
    Collapse, equilibrium, and fragmentation of rotating, adiabatic clouds (1980)
    Springer
    Space science reviews 27 (1980), S. 255-259 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Numerical calculations of the collapse of adiabatic clouds from uniform density and rotation initial conditions show that when restricted to axisymmetry, the clouds form either near-equilibrium spheroids or rings. Rings form in the collapse of low thermal energy clouds and have β = T/ ¦W¦≳ 0.43. When the axisymmetric constraint is removed and an initial m=2 density variation is introduced, clouds either collapse to form near-equilibrium ellipsoids or else fragment into binary systems through a bar phase. Ellipsoids form in the collapse of high thermal energy clouds and have 3 ≲ 0.27. The results are consistent with the critical values of β for instabilities in Maclaurin spheroids, and suggest that protostellar clouds may undergo a dynamic fragmentation in the nonisothermal collapse regime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00168306
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  • 8
    Electronic Resource
    Electronic Resource
    NASA and the Search for Extrasolar Planets (1998)
    Springer
    Earth, moon and planets 81 (1998), S. 35-38 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006380328814
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  • 9
    Electronic Resource
    Electronic Resource
    3D hydrodynamics and radiative transfer (1988)
    Springer
    Celestial mechanics and dynamical astronomy 45 (1988), S. 85-88 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Finite difference codes for the solution of the fully three dimensional equations of hydrodynamics, self-gravitation, and radiative transfer have been developed for use on relatively modest computers. Originally developed to study the collapse and fragmentation of protostellar clouds, this family of codes has been used to study a variety of astrophysical problems, with a particular emphasis on cosmogonical issues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01228984
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  • 10
    Electronic Resource
    Electronic Resource
    Atomgewichte für 1929 (1929)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 77 (1929), S. 217-221 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01362192
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