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  • 1
    Electronic Resource
    Electronic Resource
    Probing of the pairing state of HTSCs utilizing a-b plane magnetization anisotropy (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6344-6344 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have performed measurements of the a-b plane longitudinal and transverse magnetization anisotropy on an untwinned, high quality single crystal of LuBa2Cu3O7−x in magnetic fields below Hc1 as a function of temperature, from 2 K to the transition temperature and the angle between the field and a fixed direction in the a-b plane. When the superconducting order parameter has nodes on the Fermi surface, such as the case of the spin-singlet dx2−y2 order parameter, nonlinear effects associated with low-energy quasiparticles should become important.1 It was pointed out by Yip and Sauls that these effects will be most important at low temperatures. They should be observable in a measurement of the anisotropy of the magnetization or the magnetic torque. The magnetization is predicted to develop an anisotropic component transverse to the applied field. Anisotropic transverse magnetization with dx2−y2 symmetry is not seen in the temperature regime 5 to 25 K. Our results set stringent limits on the anisotropy of the transverse magnetization in this range. Within the resolution of our experiment no evidence for d-wave pairing is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355396
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution differential optical reflectivity measurements of freestanding liquid-crystal films (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 3184-3187 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A differential optical reflectivity measurement technique for freestanding films is presented. The system is highly sensitive to changes in the polarization state of the reflected light. The method is used to study the evolution of an optically anisotropic liquid crystalline structure with temperature. In addition we present a reflectivity method for determining the film thickness for films consisting of two to hundreds of layers. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1305520
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  • 3
    Electronic Resource
    Electronic Resource
    New experimental technique for simultaneously measuring thermal conductivity and heat capacity (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1390-1393 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new technique for simultaneously measuring the thermal conductivity and heat capacity of any thin sample is described. Extensive measurements on microscope cover glass slides and on one liquid-crystal compound have been carried out. The results are in good agreement with reported values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138490
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  • 4
    Electronic Resource
    Electronic Resource
    An ac calorimeter for measuring heat capacity of free-standing liquid-crystal films (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 415-421 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A unique ac calorimeter for measuring the heat capacity of free-standing liquid-crystal films has been developed. A theory of the measurement method used is presented and the experimental setup is discussed. The calorimeter has been used to study the nature of the smectic-A-hexatic-B transition of several liquid-crystal compounds. The evolution of the heat-capacity anomaly associated with this transition has been studied for films ranging from three to a few thousand smectic layers in thickness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142136
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  • 5
    Electronic Resource
    Electronic Resource
    Quantum-confined Stark shift in electroreflectance of InAs/InxGa1−xAs self-assembled quantum dots (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1760-1762 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electroreflectance was employed to study the electric-field effect on the interband transitions of InAs quantum dots embedded in an In0.16Ga0.84As matrix. The electric field caused an asymmetric quantum-confined Stark shift, which revealed a nonzero built-in dipole moment in the quantum dots. We found the ground-state and excited-state dipole moments to be in the same direction. The electron wave functions are distributed near the base of the quantum dot, with their centers located below the hole wave functions. We also observed a symmetric Stark shift in the wetting-layer transitions. This implies that the wetting-layer potential is symmetric, despite its being capped with quantum dots. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1355989
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  • 6
    Electronic Resource
    Electronic Resource
    dc characterization of the Ga0.51In0.49P/GaAs tunneling emitter bipolar transistor (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 2138-2140 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ga0.51In0.49P/GaAs tunneling emitter bipolar transistors (TEBTs) grown by gas source molecular beam epitaxy with different barrier thicknesses (50 and 100 A(ring)) have been fabricated and measured at different temperatures (77 and 300 K) for the first time. A current gain of 141 and an offset voltage of 50 mV at room temperature were achieved in the thick barrier (100 A(ring)) device with heavily doped p+ (1×1019 cm−3) base. The thinner device had a lower gain (∼53) than the thick barrier device at room temperature. The functional dependence of gain on thickness was attributed to carrier tunneling through the barrier inserted between the base and the emitter. The low-temperature (77 K) results showed that the gain of the thick barrier device was almost the same as that at 300 K while that of the thin barrier device increased, which was explained by the nonequilibrium electron transport in the base.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107062
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  • 7
    Electronic Resource
    Electronic Resource
    Potential organ- or tumor-imaging agents. 18. Radioiodinated diamines and bisquaternaries (1979)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 22 (1979), S. 449-452 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00190a018
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  • 8
    Electronic Resource
    Electronic Resource
    Chalcogenide Glass Thin Films and Planar Waveguides (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Over the past decade, we have carried out a comprehensive development program to produce high-purity Ga:La:S and Ge:S glasses and further process these glasses into thin films. In this paper, we discuss the general properties of these glass systems and the techniques used to obtain thin films. We demonstrate the ability to deposit high-quality films ranging in thickness from nanometers to several millimeters by several methods, including chemical vapor deposition technique, a technique not usually applied to chalcogenide glasses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00349.x
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  • 9
    Electronic Resource
    Electronic Resource
    Impact of intravenous omeprazole on Helicobacter pylori eradication by triple therapy in patients with peptic ulcer bleeding (2002)
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 16 (2002), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To test the impact of intravenous omeprazole on Helicobacter pylori eradication for bleeding peptic ulcers.〈section xml:id="abs1-2"〉〈title type="main"〉Methods:A total of 175 H. pylori-infected patients with bleeding peptic ulcers were randomized into either an omeprazole group or a ranitidine group, receiving intravenous omeprazole or ranitidine for 3 days after endoscopy. Afterwards, 1-week triple therapy was used to eradicate H. pylori for both groups. Six weeks later, either a 13C-urea breath test or follow-up endoscopy was performed to assess the success of H. pylori eradication.〈section xml:id="abs1-3"〉〈title type="main"〉Results:The rebleeding rate was lower in the omeprazole group vs. the ranitidine group (6% vs. 17%, P 〈 0.05). The H. pylori eradication rate was higher in the omeprazole group (intention-to-treat analysis: 83% vs. 66%, P 〈 0.05; per protocol analysis: 93% vs. 80%, P 〈 0.05). For patients with duodenal ulcers, the per protocol H. pylori eradication rate of the omeprazole group was higher than that of the ranitidine group (93% vs. 73%, P 〈 0.05).〈section xml:id="abs1-4"〉〈title type="main"〉Conclusions:Intravenous omeprazole can decrease the risk of rebleeding of peptic ulcers. For duodenal ulcers, in particular, intravenous omeprazole may even improve the H. pylori eradication rate of the subsequent triple therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2002.01137.x
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  • 10
    Electronic Resource
    Electronic Resource
    Mass Transfer from Spherical Gas Bubbles and Liquid Droplets Moving through Power-Law Fluids in the Laminar Flow Regime (1970)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 9 (1970), S. 480-488 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i160035a028
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