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  • 1
    Electronic Resource
    Electronic Resource
    Composite viscoelasticity in glassy, transitional and molten states (1988)
    Springer
    Rheologica acta 27 (1988), S. 179-185 
    Details
    ISSN: 1435-1528
    Keywords: Activation energy ; composite materials ; filler volume fraction ; shearthinningviscosity ; polystyrenemelt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract As part of a study of viscous and elastic behaviors, over a range of temperatures from below the glass transition up to the hot melt, we here report steady-shear viscosities at 0.007 to 13 s−1 and at 160 to 220 °C of polystyrene containing 0 to 60% by mass of 0.18-micron diameter titanium dioxide particles. The materials were shearthinning without a yield stress, with a constant activation energy at constant stress, but having a shear-dependent activation energy at constant shear rate — proportional to the volume fraction of the polymer matrix. Superposition of the flow curves at different temperatures for the unfilled and filled systems was possible. All the data were represented by one equation with four parameters: 1) a shear stress coefficient (units Pa · s2); 2) a characteristic stress level for non-Newtonian behavior, independent of temperature and composition; 3) an activation energy at constant stress; and 4) an Einstein coefficient (or intrinsic viscosity of the filler). Other equations also fitted the data, but the others diverged widely when extrapolated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331903
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  • 2
    Electronic Resource
    Electronic Resource
    Composite viscoelasticity in glassy, transitional and molten states (1988)
    Springer
    Rheologica acta 27 (1988), S. 186-196 
    Details
    ISSN: 1435-1528
    Keywords: Complexmodulus ; composite material ; filler volume fraction ; glass transition ; viscoelastic region
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract An extensive study of the effect of a filler (TiO2) on viscous and elastic responses of an amorphous polymer (polystyrene) was carried out using the Weissenberg Rheogoniometer in the dynamic shear mode. The effects of temperatureT, angular frequencyω and filler volume fractionø f , on the complex shear modulusG′ +i G″, were studied. The uniqueness of a plot of logG′ against logG″ for a given system, in which the independent variablesT andω are eliminated, can be used to identify the viscoelastic regions. An absolute glass transition can be identified in terms of a pair of values ofG′ andG″ max, in contrast to the traditional identification of aT g which depends on time scale. In the molten state up to moderateø f , there is an equivalence of time, temperature or volume fraction of filler; an empirical equation is proposed to relateG′ toG″. Highly filled systems exhibit non-linear viscoelasticity. If the different materials are compared at the sameG″, addition of filler increases elasticityG′ in the glassy state, but does not alterG′ in the molten state; thus at the glass transition the effect of a filler on elasticity of this polymer system changes. When parallelism between steady and dynamic shears in the molten state was explored, we found that the Cox-Merz rule does not hold for these filled systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331904
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical behaviour of microamount of radium transferred from liquid to solid phase (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 96 (1985), S. 593-599 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Some results of tests on removing radium from liquid phase by adsorption on barytes are described. The paper demonstrates the mechanism for removal of radium, which is basically a chemical exchange between radium and barium ions on solid surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02165039
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic mechanical measurements on monofilaments (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 2575-2588 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Monofilaments were obtained or extruded and drawn to representative degrees. The dynamic mechanical properties of polyether based polyurethane, high density polyethylene, and polycaprolactam monofilaments produced commercially and of laboratory prepared monofilaments of low and high density polyethylene, poly(ethylene terephthalate), and poly(tetramethylene terephthalate) were measured. The data are compared with those from oriented film and amorphous or unoriented film when possible. The effect of orientation on the properties was clearly detectable as was the effect of absorption of water vapor on polycaprolactam.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300622
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  • 5
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    Targeted exome sequencing reveals novel USH2A mutations in Chinese patients with simplex Usher syndrome (2015)
    BioMed Central
    Details
    Publication Date: 2015-09-17
    Description: Background: Usher syndrome (USH) is an autosomal recessive disorder characterized by hearing impairment and vision dysfunction due to retinitis pigmentosa. Phenotypic and genetic heterogeneities of this disease make it impractical to obtain a genetic diagnosis by conventional Sanger sequencing. Methods: In this study, we applied a next-generation sequencing approach to detect genetic abnormalities in patients with USH. Two unrelated Chinese families were recruited, consisting of two USH afflicted patients and four unaffected relatives. We selected 199 genes related to inherited retinal diseases as targets for deep exome sequencing. Through systematic data analysis using an established bioinformatics pipeline, all variants that passed filter criteria were validated by Sanger sequencing and co-segregation analysis. Results: A homozygous frameshift mutation (c.4382delA, p.T1462Lfs*2) was revealed in exon20 of gene USH2A in the F1 family. Two compound heterozygous mutations, IVS47 + 1G 〉 A and c.13156A 〉 T (p.I4386F), located in intron 48 and exon 63 respectively, of USH2A, were identified as causative mutations for the F2 family. Of note, the missense mutation c.13156A 〉 T has not been reported so far. Conclusion: In conclusion, targeted exome sequencing precisely and rapidly identified the genetic defects in two Chinese USH families and this technique can be applied as a routine examination for these disorders with significant clinical and genetic heterogeneity.
    Electronic ISSN: 1471-2350
    Topics: Biology , Medicine
    Published by BioMed Central
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  • 6
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    Geometric Correction of PHI Hyperspectral Image without Ground Control Points (2014)
    Institute of Physics (IOP)
    Details
    Publication Date: 2014-03-19
    Description: Geometric correction without ground control points (GCPs) is a very important topic. Conventional airborne photogrammetry is difficult to implement in areas where the installation of GCPs is not available. The technical of integrated GPS/INS systems providing the positioning and attitude of airborne systems is a potential solution in such areas. This paper first states the principle of geometric correction based on a combination of GPS and INS then the error of the geometric correction of Pushbroom Hyperspectral Imager (PHI) without GCP was analysed, then a flight test was carried out in an area of Damxung, Tibet. The experiment result showed that the error at straight track was small, generally less than 1 pixel, while the maximum error at cross track direction, was close to 2 pixels. The results show that geometric correction of PHI without GCP enables a variety of mapping products to be generated from airborne navigation and imagery data.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 7
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    Anomalous laser deflection phenomenon based on the interaction of electro-optic and graded refractivity effects in Cu-doped KTa1−xNbxO3 crystal (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-08-08
    Description: An abnormal laser deflection phenomenon in a copper-doped KTa 1−x Nb x O 3 (Cu:KTN) crystal is demonstrated in this Letter. A near-50 mrad beam deflection angle was observed when a voltage of 1.2 kV was applied to a Cu:KTN block with size of 2.8 mm × 1.2 mm × 7.5 mm at room temperature. The special features of this deflection phenomenon are that the laser beam deflection direction is perpendicular to the electric field direction, and the beam deflection angle remains unchanged when the electric field direction is reversed. The operating principle of the phenomenon is investigated and the origin of the deflection phenomenon is attributed to an interaction between the graded refractivity effect and the quadratic electro-optic effect of the crystal.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 8
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    Universal short-time quantum critical dynamics of finite-size systems (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-09-13
    Description: Author(s): Yu-Rong Shu, Shuai Yin, and Dao-Xin Yao We investigate the short-time quantum critical dynamics in the imaginary-time relaxation processes of finite-size systems. Universal scaling behaviors exist in the imaginary-time evolution. In particular, the system undergoes a critical initial slip stage characterized by an exponent θ , in which an ... [Phys. Rev. B 96, 094304] Published Tue Sep 12, 2017
    Keywords: Dynamics, dynamical systems, lattice effects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 9
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    Dynamical properties of the $S=\frac{1}{2}$ random Heisenberg chain (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-03-29
    Description: Author(s): Yu-Rong Shu, Maxime Dupont, Dao-Xin Yao, Sylvain Capponi, and Anders W. Sandvik We study dynamical properties at finite temperature ( T ) of Heisenberg spin chains with random antiferromagnetic exchange couplings, which realize the random singlet phase in the low-energy limit, using three complementary numerical methods: exact diagonalization, matrix-product-state algorithms, and... [Phys. Rev. B 97, 104424] Published Wed Mar 28, 2018
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 10
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    Satellite-to-Ground Entanglement-Based Quantum Key Distribution (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-11-14
    Description: Author(s): Juan Yin, Yuan Cao, Yu-Huai Li, Ji-Gang Ren, Sheng-Kai Liao, Liang Zhang, Wen-Qi Cai, Wei-Yue Liu, Bo Li, Hui Dai, Ming Li, Yong-Mei Huang, Lei Deng, Li Li, Qiang Zhang, Nai-Le Liu, Yu-Ao Chen, Chao-Yang Lu, Rong Shu, Cheng-Zhi Peng, Jian-Yu Wang, and Jian-Wei Pan A quantum cryptographic key using entangled photons is generated between a ground station and China’s satellite, Micius. [Phys. Rev. Lett. 119, 200501] Published Mon Nov 13, 2017
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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