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  • 1
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    Failure of submarine slopes under wave action (1972)
    In:  Proceedings 13th Coastal Eng. Conf., July 10-14, 1972, Vancouver, New York, Geophysics Laboratory, vol. C 560, 183 pp., no. GL-TR-89-0142, pp. 109-124, (ISBN 3-933346-037)
    Details
    Publication Date: 1972
    Keywords: Fluids ; Sea seismics ; Waves
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Risks, Vol. 7, Pages 106: Volatility Timing in CPF Investment Funds in Singapore: Do They Outperform Non-CPF Funds? (2019)
    MDPI
    In: Risks
    Details
    Publication Date: 2019
    Description: The purpose of this study is to examine the volatility-timing performance of Singapore-based funds under the Central Provident Fund (CPF) Investment Scheme and non-CPF linked funds by taking into account the currency risk effect on internationally managed funds. In particular, we empirically assess whether the funds under the CPF Investment Scheme outperform non-CPF funds by examining the volatility-timing performance associated with these funds. The volatility-timing ability of CPF funds will provide the CPF board with a new method for risk classification. We employ the GARCH models and modified factor models to capture the response of funds to market abnormal conditional volatility including the weekday effect. The SMB and HML factors for non-US based funds are constructed from stock market data to exclude the contribution of the size effect and the BE/ME effect. The results show that volatility timing is one of the factors contributing to the excess return of funds. However, funds’ volatility-timing seems to be country-specific. Most of the Japanese equity funds and global equity funds under the CPF Investment Scheme are found to have the ability of volatility timing. This finding contrasts with the existing studies on Asian, ex-Japan funds and Greater China funds. Moreover, there is no evidence that funds under the CPF Investment Scheme show a better group performance of volatility timing.
    Electronic ISSN: 2227-9091
    Topics: Economics
    Published by MDPI
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  • 3
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    Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-06-29
    Description: The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. We used electron diffraction at mega–electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the irreversible melting regime, we first observed heterogeneous melting on time scales of 100 to 1000 picoseconds, transitioning to homogeneous melting that occurs catastrophically within 10 to 20 picoseconds at higher energy densities. We showed evidence for the heterogeneous coexistence of solid and liquid. We determined the ion and electron temperature evolution and found superheated conditions. Our results constrain the electron-ion coupling rate, determine the Debye temperature, and reveal the melting sensitivity to nucleation seeds.
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , 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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    Glass transition dynamics and surface layer mobility in unentangled polystyrene films (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-06-26
    Description: Most polymers solidify into a glassy amorphous state, accompanied by a rapid increase in the viscosity when cooled below the glass transition temperature (T(g)). There is an ongoing debate on whether the T(g) changes with decreasing polymer film thickness and on the origin of the changes. We measured the viscosity of unentangled, short-chain polystyrene films on silicon at different temperatures and found that the transition temperature for the viscosity decreases with decreasing film thickness, consistent with the changes in the T(g) of the films observed before. By applying the hydrodynamic equations to the films, the data can be explained by the presence of a highly mobile surface liquid layer, which follows an Arrhenius dynamic and is able to dominate the flow in the thinnest films studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Zhaohui -- Fujii, Yoshihisa -- Lee, Fuk Kay -- Lam, Chi-Hang -- Tsui, Ophelia K C -- New York, N.Y. -- Science. 2010 Jun 25;328(5986):1676-9. doi: 10.1126/science.1184394.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, Boston University, Boston, MA 02215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20576887" 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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  • 5
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    Global gene deletion analysis exploring yeast filamentous growth (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-09-18
    Description: The dimorphic switch from a single-cell budding yeast to a filamentous form enables Saccharomyces cerevisiae to forage for nutrients and the opportunistic pathogen Candida albicans to invade human tissues and evade the immune system. We constructed a genome-wide set of targeted deletion alleles and introduced them into a filamentous S. cerevisiae strain, Sigma1278b. We identified genes involved in morphologically distinct forms of filamentation: haploid invasive growth, biofilm formation, and diploid pseudohyphal growth. Unique genes appear to underlie each program, but we also found core genes with general roles in filamentous growth, including MFG1 (YDL233w), whose product binds two morphogenetic transcription factors, Flo8 and Mss11, and functions as a critical transcriptional regulator of filamentous growth in both S. cerevisiae and C. albicans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ryan, Owen -- Shapiro, Rebecca S -- Kurat, Christoph F -- Mayhew, David -- Baryshnikova, Anastasia -- Chin, Brian -- Lin, Zhen-Yuan -- Cox, Michael J -- Vizeacoumar, Frederick -- Cheung, Doris -- Bahr, Sondra -- Tsui, Kyle -- Tebbji, Faiza -- Sellam, Adnane -- Istel, Fabian -- Schwarzmuller, Tobias -- Reynolds, Todd B -- Kuchler, Karl -- Gifford, David K -- Whiteway, Malcolm -- Giaever, Guri -- Nislow, Corey -- Costanzo, Michael -- Gingras, Anne-Claude -- Mitra, Robi David -- Andrews, Brenda -- Fink, Gerald R -- Cowen, Leah E -- Boone, Charles -- 42516-4/Canadian Institutes of Health Research/Canada -- GM035010/GM/NIGMS NIH HHS/ -- GM40266/GM/NIGMS NIH HHS/ -- MOP-97939/Canadian Institutes of Health Research/Canada -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2012 Sep 14;337(6100):1353-6. doi: 10.1126/science.1224339.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Banting and Best Department of Medical Research, University of Toronto, Toronto, ON M5S 3E1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22984072" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Biofilms/growth & development ; Candida albicans/cytology/*genetics/*growth & development ; DNA Mutational Analysis ; Gene Deletion ; *Gene Expression Regulation, Fungal ; Hyphae/genetics/growth & development ; Nuclear Proteins/genetics ; Saccharomyces cerevisiae/cytology/*genetics/*growth & development ; Saccharomyces cerevisiae Proteins/genetics ; Trans-Activators/genetics ; Transcription Factors/genetics ; Transcription, Genetic
    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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  • 6
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    Materials science. The surface mobility of glasses (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-03-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Fei -- Lam, Chi-Hang -- Tsui, Ophelia K C -- New York, N.Y. -- Science. 2014 Feb 28;343(6174):975-6. doi: 10.1126/science.1248113.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, Boston University, Boston, MA 02215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24578568" 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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  • 7
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    Subtypes of associated protein-DNA (Transcription Factor-Transcription Factor Binding Site) patterns (2012)
    Oxford University Press
    Details
    Publication Date: 2012-10-24
    Description: In protein–DNA interactions, particularly transcription factor (TF) and transcription factor binding site (TFBS) bindings, associated residue variations form patterns denoted as subtypes. Subtypes may lead to changed binding preferences, distinguish conserved from flexible binding residues and reveal novel binding mechanisms. However, subtypes must be studied in the context of core bindings. While solving 3D structures would require huge experimental efforts, recent sequence-based associated TF-TFBS pattern discovery has shown to be promising, upon which a large-scale subtype study is possible and desirable. In this article, we investigate residue-varying subtypes based on associated TF-TFBS patterns. By re-categorizing the patterns with respect to varying TF amino acids, statistically significant ( P values ≤ 0.005) subtypes leading to varying TFBS patterns are discovered without using TF family or domain annotations. Resultant subtypes have various biological meanings. The subtypes reflect familial and functional properties and exhibit changed binding preferences supported by 3D structures. Conserved residues critical for maintaining TF-TFBS bindings are revealed by analyzing the subtypes. In-depth analysis on the subtype pair PKV V IL-CA CG TG versus PKV E IL-CA GC TG shows the V/E variation is indicative for distinguishing Myc from MRF families. Discovered from sequences only, the TF-TFBS subtypes are informative and promising for more biological findings, complementing and extending recent one-sided subtype and familial studies with comprehensive evidence.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 8
    Electronic Resource
    Electronic Resource
    Comments on "Dispersion relation of a plasma in the periodic magnetic field of a wiggler" [Phys. Plasmas 3, 1773 (1996)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2768-2768 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is argued that the equilibrium state of a wiggler background magnetoplasma corresponds to a zero momentum rather than to a plasma acquiring a non-zero velocity. (AIP)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872398
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    High-gain reverse guide field free electron lasers (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 3865-3870 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron beam trajectories under circularly polarized external wigglers in free electron laser devices with axial guide fields are reconsidered by introducing the self-fields of the electron beam. The competition between the self-fields and the wiggler field plus the action of the guide field are not only responsible for the known positive guide field singularity, but also the new reverse guide field singularity. The physics of the new reverse field singularity relies on the fact that an azimuthal magnetic field uniform in z is able to generate steady-state helical beam orbits just as if it were a transverse wiggler. According to this theory, the handness of the circularly polarized microwave should depend on the guide field configuration. High-gain strong pump equations coupled to these trajectories are used to account for the Massachusetts Institute of Technology reverse guide field results [Phys. Rev. Lett. 67, 3082 (1991)]. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871469
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  • 10
    Electronic Resource
    Electronic Resource
    Force-free field model of ball lightning (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 687-689 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Due to the nature that the force-free magnetic field, whose current carried by the conducting plasma is everywhere parallel to the magnetic field it generates, is the minimum energy configuration under the constraint of magnetic helicity conservation, ball lightning is considered as a self-organized phenomenon with a plasma fireball immersed in a spherical force-free magnetic field. Since this field does not exert force on the plasma, the plasma pressure, by itself, is in equilibrium with the surrounding environment, and the force-free magnetic field can take on any value without affecting the plasma. Due to this second feature, singular solutions of the magnetic field that are otherwise excluded are allowed, which enable a large amount of energy to be stored to sustain the ball lightning. The singularity is truncated only by the physical limit of current density that a plasma can carry. Scaling the customary soccer-size fireball to larger dimensions could account for day and night sightings of luminous objects in the sky. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1343511
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