Institution
University of California, Santa Barbara
Education•Santa Barbara, California, United States•
About: University of California, Santa Barbara is a education organization based out in Santa Barbara, California, United States. It is known for research contribution in the topics: Population & Laser. The organization has 30281 authors who have published 80852 publications receiving 4626827 citations. The organization is also known as: UC Santa Barbara & UCSB.
Topics: Population, Laser, Galaxy, Context (language use), Quantum well
Papers published on a yearly basis
Papers
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TL;DR: In this article, the role of animation in multimedia learning is examined, including multimedia instructional messages and microworld games, and a cognitive theory of multimedia learning, which has yielded seven principles for the use of animation for multimedia instruction.
Abstract: How can animation be used to promote learner understanding of scientific and mathematical explanations? In this review, we examine the role of animation in multimedia learning (including multimedia instructional messages and microworld games), present a cognitive theory of multimedia learning, and summarize our program of research, which has yielded seven principles for the use of animation in multimedia instruction. These include the multimedia principle (present animation and narration rather than narration alone), spatial contiguity principle (present on-screen text near rather than far from corresponding animation), temporal contiguity principle (present corresponding animation and narration simultaneously rather than successively), coherence principle (exclude extraneous words, sounds, and video), modality principle (present animation and narration rather than animation and onscreen text), redundancy principle (present animation and narration rather than animation, narration, and on-screen text), and personalization principle (present words in conversational rather than formal style). Animation can promote learner understanding when used in ways that are consistent with the cognitive theory of multimedia learning.
743 citations
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TL;DR: Variations in the axion field can give rise to peculiar distributions of charge and current, and these effects provide a simple understanding of the fractional electric charge on dyons and of some recently discovered oddities in the electrodynamics of antiphase boundaries in PbTe.
Abstract: The equations of axion electrodynamics are studied. Variations in the axion field can give rise to peculiar distributions of charge and current. These effects provide a simple understanding of the fractional electric charge on dyons and of some recently discovered oddities in the electrodynamics of antiphase boundaries in PbTe. Some speculations regarding the possible occurrence of related phenomena in other solids are presented.
743 citations
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University of Copenhagen1, Harvard University2, Lund University3, Ames Research Center4, San Jose State University5, University of Texas at Austin6, California Institute of Technology7, University of Florida8, Space Telescope Science Institute9, University of California, Berkeley10, Bowling Green State University11, University of Hertfordshire12, Rensselaer Polytechnic Institute13, Las Cumbres Observatory Global Telescope Network14, University of California, Santa Barbara15
TL;DR: Spectroscopic metallicities of the host stars of 226 small exoplanet candidates discovered by NASA's Kepler mission are reported, finding that planets with radii less than four Earth radii form around host stars with a wide range of metallicities (but on average a metallicity close to that of the Sun), whereas large planets preferentially form around stars with higher metallicities.
Abstract: The abundance of heavy elements (metallicity) in the photospheres of stars similar to the Sun provides a 'fossil' record of the chemical composition of the initial protoplanetary disk. Metal-rich stars are much more likely to harbour gas giant planets(1-4), supporting the model that planets form by accumulation of dust and ice particles(5). Recent ground-based surveys suggest that this correlation is weakened for Neptunian-sized planets(4,6-9). However, how the relationship between size and metallicity extends into the regime of terrestrial-sized exoplanets is unknown. Here we report spectroscopic metallicities of the host stars of 226 small exoplanet candidates discovered by NASA's Kepler mission(10), including objects that are comparable in size to the terrestrial planets in the Solar System. We find that planets with radii less than four Earth radii form around host stars with a wide range of metallicities (but on average a metallicity close to that of the Sun), whereas large planets preferentially form around stars with higher metallicities. This observation suggests that terrestrial planets may be widespread in the disk of the Galaxy, with no special requirement of enhanced metallicity for their formation.
743 citations
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TL;DR: A model that makes use of the cooperative organization of inorganic and organic molecular species into three dimensionally structured arrays is generalized for the synthesis of nanocomposite materials to separate the effects of self-assembly from the kinetics of silicate polymerization.
Abstract: A model that makes use of the cooperative organization of inorganic and organic molecular species into three dimensionally structured arrays is generalized for the synthesis of nanocomposite materials. In this model, the properties and structure of a system are determined by dynamic interplay among ion-pair inorganic and organic species, so that different phases can be readily obtained through small variations of controllable synthesis parameters, including mixture composition and temperature. Nucleation, growth, and phase transitions may be directed by the charge density, coordination, and steric requirements of the inorganic and organic species at the interface and not necessarily by a preformed structure. A specific example is presented in which organic molecules in the presence of multiply charged silicate oligomers self-assemble into silicatropic liquid crystals. The organization of these silicate-surfactant mesophases is investigated with and without interfacial silicate condensation to separate the effects of self-assembly from the kinetics of silicate polymerization.
742 citations
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TL;DR: In this article, the authors examined the possibility that the superconducting state of these materials is characterized by d x 2 − y 2 pairing and showed that this type of pairing might be favored in a strongly correlated system with a short-range Coulomb interaction.
742 citations
Authors
Showing all 30652 results
Name | H-index | Papers | Citations |
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George M. Whitesides | 240 | 1739 | 269833 |
Yi Chen | 217 | 4342 | 293080 |
Simon D. M. White | 189 | 795 | 231645 |
George Efstathiou | 187 | 637 | 156228 |
Peidong Yang | 183 | 562 | 144351 |
David R. Williams | 178 | 2034 | 138789 |
Alan J. Heeger | 171 | 913 | 147492 |
Richard H. Friend | 169 | 1182 | 140032 |
Jiawei Han | 168 | 1233 | 143427 |
Gang Chen | 167 | 3372 | 149819 |
Alexander S. Szalay | 166 | 936 | 145745 |
Omar M. Yaghi | 165 | 459 | 163918 |
Carlos S. Frenk | 165 | 799 | 140345 |
Yang Yang | 164 | 2704 | 144071 |
Carlos Bustamante | 161 | 770 | 106053 |