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  • 1
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    Temperature controlled motion of an antiferromagnet- ferromagnet interface within a dopant-graded FeRh epilayer (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-02-05
    Description: Chemically ordered B2 FeRh exhibits a remarkable antiferromagnetic-ferromagnetic phase transition that is first order. It thus shows phase coexistence, usually by proceeding though nucleation at random defect sites followed by propagation of phase boundary domain walls. The transition occurs at a temperature that can be varied by doping other metals onto the Rh site. We have taken advantage of this to yield control over the transition process by preparing an epilayer with oppositely directed doping gradients of Pd and Ir throughout its height, yielding a gradual transition that occurs between 350 K and 500 K. As the sample is heated, a horizontal antiferromagnetic-ferromagnetic phase boundary domain wall moves gradually up through the layer, its position controlled by the temperature. This mobile magnetic domain wall affects the magnetisation and resistivity of the layer in a way that can be controlled, and hence exploited, for novel device applications.
    Electronic ISSN: 2166-532X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by American Institute of Physics (AIP)
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  • 2
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    Microearthquakes and the nature of the creeping-to-locked transition of the San Andreas fault zone near San Juan Bautista, California (1984)
    In:  Bull. Seism. Soc. Am., Washington D.C., Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 74, no. 4, pp. 235-254, pp. L09611
    Details
    Publication Date: 1984
    Keywords: Fault zone ; Creep observations and analysis ; Earthquake asperities ; Seismicity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    The genome of a songbird (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-04-03
    Description: The zebra finch is an important model organism in several fields with unique relevance to human neuroscience. Like other songbirds, the zebra finch communicates through learned vocalizations, an ability otherwise documented only in humans and a few other animals and lacking in the chicken-the only bird with a sequenced genome until now. Here we present a structural, functional and comparative analysis of the genome sequence of the zebra finch (Taeniopygia guttata), which is a songbird belonging to the large avian order Passeriformes. We find that the overall structures of the genomes are similar in zebra finch and chicken, but they differ in many intrachromosomal rearrangements, lineage-specific gene family expansions, the number of long-terminal-repeat-based retrotransposons, and mechanisms of sex chromosome dosage compensation. We show that song behaviour engages gene regulatory networks in the zebra finch brain, altering the expression of long non-coding RNAs, microRNAs, transcription factors and their targets. We also show evidence for rapid molecular evolution in the songbird lineage of genes that are regulated during song experience. These results indicate an active involvement of the genome in neural processes underlying vocal communication and identify potential genetic substrates for the evolution and regulation of this behaviour.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3187626/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3187626/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, Wesley C -- Clayton, David F -- Ellegren, Hans -- Arnold, Arthur P -- Hillier, Ladeana W -- Kunstner, Axel -- Searle, Steve -- White, Simon -- Vilella, Albert J -- Fairley, Susan -- Heger, Andreas -- Kong, Lesheng -- Ponting, Chris P -- Jarvis, Erich D -- Mello, Claudio V -- Minx, Pat -- Lovell, Peter -- Velho, Tarciso A F -- Ferris, Margaret -- Balakrishnan, Christopher N -- Sinha, Saurabh -- Blatti, Charles -- London, Sarah E -- Li, Yun -- Lin, Ya-Chi -- George, Julia -- Sweedler, Jonathan -- Southey, Bruce -- Gunaratne, Preethi -- Watson, Michael -- Nam, Kiwoong -- Backstrom, Niclas -- Smeds, Linnea -- Nabholz, Benoit -- Itoh, Yuichiro -- Whitney, Osceola -- Pfenning, Andreas R -- Howard, Jason -- Volker, Martin -- Skinner, Bejamin M -- Griffin, Darren K -- Ye, Liang -- McLaren, William M -- Flicek, Paul -- Quesada, Victor -- Velasco, Gloria -- Lopez-Otin, Carlos -- Puente, Xose S -- Olender, Tsviya -- Lancet, Doron -- Smit, Arian F A -- Hubley, Robert -- Konkel, Miriam K -- Walker, Jerilyn A -- Batzer, Mark A -- Gu, Wanjun -- Pollock, David D -- Chen, Lin -- Cheng, Ze -- Eichler, Evan E -- Stapley, Jessica -- Slate, Jon -- Ekblom, Robert -- Birkhead, Tim -- Burke, Terry -- Burt, David -- Scharff, Constance -- Adam, Iris -- Richard, Hugues -- Sultan, Marc -- Soldatov, Alexey -- Lehrach, Hans -- Edwards, Scott V -- Yang, Shiaw-Pyng -- Li, Xiaoching -- Graves, Tina -- Fulton, Lucinda -- Nelson, Joanne -- Chinwalla, Asif -- Hou, Shunfeng -- Mardis, Elaine R -- Wilson, Richard K -- BB/D013704/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E010652/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/F007590/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBE0175091/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/E/I/00001425/Biotechnology and Biological Sciences Research Council/United Kingdom -- MC_U137761446/Medical Research Council/United Kingdom -- P30 DA018310/DA/NIDA NIH HHS/ -- R01 DC007218/DC/NIDCD NIH HHS/ -- R01 GM059290/GM/NIGMS NIH HHS/ -- R01 GM085233/GM/NIGMS NIH HHS/ -- R01 GM59290/GM/NIGMS NIH HHS/ -- R01 HG002939/HG/NHGRI NIH HHS/ -- R01 NS045264/NS/NINDS NIH HHS/ -- R01NS051820/NS/NINDS NIH HHS/ -- U54 HG003079/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Apr 1;464(7289):757-62. doi: 10.1038/nature08819.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Genome Center, Washington University School of Medicine, Campus Box 8501, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA. wwarren@watson.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360741" target="_blank"〉PubMed〈/a〉
    Keywords: 3' Untranslated Regions/genetics ; Animals ; Auditory Perception/genetics ; Brain/physiology ; Chickens/genetics ; Evolution, Molecular ; Female ; Finches/*genetics/physiology ; Gene Duplication ; Gene Regulatory Networks/genetics ; Genome/*genetics ; Male ; MicroRNAs/genetics ; Models, Animal ; Multigene Family/genetics ; Retroelements/genetics ; Sex Chromosomes/genetics ; Terminal Repeat Sequences/genetics ; Transcription, Genetic/genetics ; Vocalization, Animal/physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Asymmetric “melting” and “freezing” kinetics of the magnetostructural phase transition in B2-ordered FeRh epilayers (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-06-12
    Description: Synchrotron X-ray diffraction was used to study the phase transformation processes during the magnetostructural transition in a B2-ordered FeRh (001)-oriented epilayer grown on MgO by sputtering. Out-of-plane lattice constant measurements within the hysteretic regime of the transition reveal a microstructure consistent with the coexistence of lattice-expanded and contracted phases in spatially distinct regions. It was found that the phase separation is more pronounced during cooling than heating. Furthermore, whilst lattice-expanded domains that span the height of the film can be undercooled by several kelvins, there is no equivalent superheating. This asymmetry between the cooling and heating processes in FeRh is consistent with the difference in the kinetics of generic freezing and melting transitions.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 5
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    Temperature dependence of spin Hall magnetoresistance in thin YIG/Pt films (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-06-14
    Description: Author(s): S. R. Marmion, M. Ali, M. McLaren, D. A. Williams, and B. J. Hickey We report on the temperature dependence of the recently discovered spin Hall magnetoresistance in a yttrium iron garnet (YIG)/platinum (Pt) thin film. The YIG/Pt layers are an ideal choice as the combination of an insulating magnetic material and the high spin-orbit interaction in Pt gives a relativ... [Phys. Rev. B 89, 220404] Published Fri Jun 13, 2014
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Parameterizing a Coupled Surface-Subsurface Three-Dimensional Soil Hydrological Model to Evaluate the Efficiency of a Runoff Water Harvesting Technique (2012)
    Soil Science Society of America (SSSA)
    Details
    Publication Date: 2012-11-28
    Description: Tools are needed to quantitatively evaluate the efficiency of water harvesting techniques in dryland environments under a wide range of climatic and soil physical conditions. In a case study for the arid zone of Chile, a detailed water balance was calculated using a coupled surface–subsurface hydrological model (HydroGeoSphere). In a first step, the model was parameterized with detailed runoff and soil water content data collected during simulated rainfall to calibrate surface and subsurface flow processes simultaneously, using six responsive parameters identified by a global sensitivity analysis. The calibrated model accurately reproduced observed soil moisture contents ( R 2 = 0.92) and runoff amounts ( R 2 = 0.97), and represented the overflowing infiltration trench, which is a clear improvement over existing frameworks that do not consider surface-subsurface flow interactions. A comparative analysis with a natural slope demonstrated that the trench was efficient in capturing runoff under high rainfall intensities, such as the one simulated, resulting in a significant decrease (46%) of runoff. In the final section, a detailed water balance of the trench was calculated for four characteristic years with increasing precipitation. Significant differences in the water balance components were only observed for the very wet year (with a return period of 67 yr), where 64% of the potential runoff was effectively harvested and stored in the soil profile. As such, this test case shows the ability of HydroGeoSphere to adequately represent the water balance components of a runoff water harvesting technique and shows its potential to become an effective tool for optimal water harvesting design, while taking both soil physical and climatic constraints into account.
    Electronic ISSN: 1539-1663
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Soil Science Society of America (SSSA)
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  • 7
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    Excitation mechanisms of Er optical centers in GaN epilayers (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-10-29
    Description: We report direct evidence of two mechanisms responsible for the excitation of optically active Er 3+ ions in GaN epilayers grown by metal-organic chemical vapor deposition. These mechanisms, resonant excitation via the higher-lying inner 4 f shell transitions and band-to-band excitation of the semiconductor host, lead to narrow emission lines from isolated and the defect-related Er optical centers. However, these centers have different photoluminescence spectra, local defect environments, decay dynamics, and excitation cross sections. The photoluminescence at 1.54 μm from the isolated Er optical center which can be excited by either mechanism has the same decay dynamics, but possesses a much higher excitation cross-section under band-to-band excitation. In contrast, the photoluminescence at 1.54 μm from the defect-related Er optical center can only be observed through band-to-band excitation but has the largest excitation cross-section. These results explain the difficulty in achieving gain in Er doped GaN and indicate approaches for realization of optical amplification, and possibly lasing, at room temperature.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 8
    Electronic Resource
    Electronic Resource
    The species dependence of inert gas ion incorporation in the ion-induced deposition of tungsten (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 2889-2895 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A study of the deposition rates of W thin films by the simultaneous irradiation of a Si substrate with 20 keV ions of Ne, Ar, Kr, and Xe and a flux of molecular W(CO)6 and measurement of the incorporated fraction of the irradiating ion species is described. It is shown that the measured growth rate contains a contribution due to sputtering of the film and, when this is accounted for, the deposition rate increases with increasing ion mass. The ion incorporation rate, on the other hand, decreases with increasing mass and a simple model is developed to explain this behavior in terms of the ratio of individual ion incorporation probability to the net metal atomic growth rate, which compares favorably with the observations. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371137
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  • 9
    Electronic Resource
    Electronic Resource
    Hercynolactone, a new carotane sesquiterpenoid from the liverworts barbilophozia lycopodioides and B. Hatcheri. crystal structure analysis.
    Amsterdam : Elsevier
    Tetrahedron Letters 23 (1982), S. 3959-3962 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)87754-0
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  • 10
    Electronic Resource
    Electronic Resource
    Desamino-8-d-arginine vasopressin and prostacyclin production in von Willebrands disease
    Amsterdam : Elsevier
    Progress in Lipid Research 25 (1986), S. 301-302 
    Details
    ISSN: 0163-7827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0163-7827(86)90060-3
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