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  • 1
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    Space-based Remote Imaging Spectroscopy of the Aliso Canyon CH4 Super-emitter (2016)
    Wiley
    Details
    Publication Date: 2016-05-29
    Description: The Aliso Canyon gas storage facility near Porter Ranch California produced a large accidental CH 4 release from October 2015 to February 2016. The Hyperion imaging spectrometer onboard the EO-1 satellite successfully detected this event, achieving the first orbital attribution of CH 4 to a single anthropogenic super-emitter. Hyperion measured shortwave infrared signatures of CH 4 near 2.3  μ m at 0.01  μ m spectral resolution and 30 m spatial resolution. It detected the plume on three overpasses, mapping its magnitude and morphology. These orbital observations were consistent with measurements by airborne instruments. We evaluate Hyperion instrument performance, draw implications for future orbital instruments, and extrapolate the potential for a global survey of CH 4 super-emitters.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 2
    Electronic Resource
    Electronic Resource
    Thin film polyaniline-polyaniline electrochemical cells (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 1031-1038 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrodeposited polyaniline (PANT) in the emeraldine oxidation state was used as the electrodes of open rechargeable cells containing 1 m HClO4 as the electrolyte. The cells could be charged at very high hourly rates to 85% of the redox charge in the leucoemeraldine-emeraldine transition of the polymer. Contrary to normal behaviour of rechargeable cells, the coulombic efficiency improved with increasing rates of charge injection and withdrawal. This is attributed to less charge being dissipated by self-discharge at high rates of discharge. The poor charge retention was caused by reactions between the charged electrodes and their environment. The decrease in cell voltage on standing may also be induced by internal redox reactions of PANT of different oxidation states present at the electrodes as a result of incomplete oxidation or reduction during cell operation. Ultraviolet (u.v.) spectroscopy of the charged electrodes identified mostly protonated leucoemeraldine at the negative electrode and pernigraniline at the positive electrode. The irreversibility in the oxidation from the emeraldine state to the pernigraniline state accounts mostly for the degeneration of cell performance after prolonged cycling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266125
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  • 3
    Electronic Resource
    Electronic Resource
    A polyaniline and Nafion® composite film as a rechargeable battery (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 512-516 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The charge-discharge characteristics of polyaniline (PAn)-Nafion®-PAn composite films used as rechargeable batteries were investigated. The batteries were formed chemically by sandwiching Nafion® between two thin layers of PAn-Nafion® composite in equilibrium with various electrolytes. It was found that cells with LiClO4 in propylene carbonate as electrolyte showed the highest capacity. The charge and discharge performance of the battery was almost independent of the choice of anions but was significantly affected by cation size. This may indicate that the insertion or removal of charge-compensating electrolyte cations from the composite layer was responsible for the redox of PAn during the charge and discharge cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024090
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  • 4
    Electronic Resource
    Electronic Resource
    Rechargeable thin film batteries of polypyrrole and polyaniline (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 738-742 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Thin films of polypyrrole (PPy) and polyaniline (PANi) were electrochemically deposited on stainless steel substrate under potentiostatic control. Secondary batteries were assembled using these polymers as active electrode materials and propylene carbonate (PC) solutions of tetraethyl ammonium perchlorate (TEAP) as the electrolyte. In repeated charge and discharge tests, the all PANi cells performed better than the PPy-PANi cells in voltage characteristics, recyclability, charge retention and coulombic efficiency. There appears to be an optimum charging current for the polymer cells and charging the cells at rates notably different from the optimum value reduced the cell performance substantially. It is suggested that the cells operate under kinetic control and charging at extreme rates either reduces the participation of polymer redox in the overall cell operation or produces mass transfer limitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027503
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  • 5
    Electronic Resource
    Electronic Resource
    The velocity field of the turbulent very near wake of a circular cylinder (1996)
    Springer
    Experiments in fluids 20 (1996), S. 441-453 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Hot-wire measurements were conducted in the very near wake (x/d⩽10) of a circular cylinder at a Reynolds number based on cylinder diameter, Re d of 3900. Measurements of the streamwise velocity component with the use of single sensor hot-wire probes were found to be inaccurate for such flowfields where high flow angles are present. An X-array probe provided detailed streamwise and lateral velocity component statistics. Frequency spectra of these two velocity components are also presented. Measurements with a 4-sensor hot-wire probe confirmed that the very near wake region is dominantly two-dimensional, thus validating the accuracy of the present X-array data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189383
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  • 6
    Electronic Resource
    Electronic Resource
    Collapse of tubular beams loaded by a wedge-shaped indenter (1996)
    Springer
    Experimental mechanics 36 (1996), S. 374-378 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents experimental studies and analyses on mild steel tube specimens that are indented by a rigid but blunt wedge-shaped indenter at the midspan. Three different support conditions are investigated: simply supported ends, fully fixed ends and the whole tube lying on a flat surface. A test program was carried out to determine the collapse loads and energy-absorbing capabilities of tubes of different sizes. Based on a dimensional argument and the experimental plots, empirical closed-form expressions have been established for the collapse loads and energy. Generally, good agreement has been obtained between the empirical equations and the experimental data. The empirical equations can provide an important first-hand guide for design engineers and analysts in this subject area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328581
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  • 7
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    The velocity field of the turbulent very near wake of a circular cylinder (1996)
    Springer
    Details
    Publication Date: 1996-04-01
    Print ISSN: 0723-4864
    Electronic ISSN: 1432-1114
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 8
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    Collapse of tubular beams loaded by a wedge-shaped indenter (1996)
    Springer
    Details
    Publication Date: 1996-12-01
    Print ISSN: 0014-4851
    Electronic ISSN: 1741-2765
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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