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  • 1
    Monograph available for loan
    Monograph available for loan
    Ice accretion on aircraft (1944)
    Dublin : Dept. of Industry and Commerce, Meteorological Service
    Associated volumes
    Details Availability
    Call number: MOP 15089 ; MOP Per 436(5)
    In: Technical note
    Type of Medium: Monograph available for loan
    Pages: 14 S.
    Series Statement: Technical note / Irish Meteorological Service 5
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Eddy current losses in composite and/or multibodies with μr≥1 (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3194-3196 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The paper deals with the computation of eddy current losses in composite and/or multiconducting cylinders due to time-harmonic transverse magnetic fields. The cylinders are linear magnetic or nonmagnetic with an arbitrary cross-section area. Two diffferent formulations in terms of the Fredholm integral equations of the second kind are used. The exact formulation comprises 2N (where N is the number of conductors) coupled one-dimensional integral equations; and the second, where the external impedance boundary condition approach is used, consists of N coupled one-dimensional integral equations. With the proper choices of the equations the highest singularity in both formulations is logarithmic (weak singularity in 2D). Numerical results are computed for the special case of a pair of circular conductors. Magnetic and nonmagnetic materials are considered and the results are compared with the corresponding results for a single circular conductor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340836
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  • 3
    Electronic Resource
    Electronic Resource
    An all-cryogenic THz transmission spectrometer (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 130-135 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article describes a THz transmission spectrometer for the spectral range of 2–65 cm−1 (100 GHz to 2 THz) with a spectral resolution of at least 1.8 cm−1 (50 GHz) where the source, sample, and detector are all fully contained in a cryogenic environment. Cyclotron emission from a two-dimensional electron gas (2DEG) heated with an electrical current serves as a magnetic-field tunable source. The spectrometer is demonstrated at 4.2 K by measuring the resonant cyclotron absorption of a second 2DEG. Unique aspects of the spectrometer are that (1) an ultrabroadband detector is used, and (2) the emitter is run quasicontinuously with a chopping frequency of only 1 Hz. Since optical coupling to room temperature components is not necessary, this technique is compatible with ultralow temperature (sub-100 mK) operation. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1426231
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  • 4
    Electronic Resource
    Electronic Resource
    Surface impedance-BEM technique for nonlinear TM-eddy current problems (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3925-3927 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The impedance boundary condition (IBC) approximation is used to formulate the problem as an exterior one, in other words, in terms of only the exterior fundamental solution. The first order boundary element technique has been used to represent the boundary integral equation numerically. The Gauss–Seidel iterative procedure was applied. The results obtained with the present approach are in good agreement with those obtained experimentally and theoretically by other authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338586
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  • 5
    Electronic Resource
    Electronic Resource
    Singularity and corner effects in a boundary element model for a short, linearly magnetic conducting cylinder (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3016-3018 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An impedance boundary condition, boundary integral equation formulation is presented for the eddy currents induced in a magnetically linear conducting body having rotational symmetry. The treatment of kernel singularities and the representations of sharp edges are examined. A numerical treatment based on Chiba's method is outlined. This method can be used to estimate correct values for the singular terms that can occur in the boundary integral equations. Two different representations of sharp edges are compared. The recommended representation is one in which well-defined normal directions are obtained everywhere on the conductor boundary. Numerical results are presented for the case of a short, conducting disk in a uniform, axially directed, time harmonic source field. It is shown that when the sharp edge is inadequately handled, the computed current density and power loss can be significantly in error.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340931
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  • 6
    Electronic Resource
    Electronic Resource
    Boundary element solution of nonlinear induction hardening applications with rotational symmetry (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4723-4725 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this paper, the 2D thermal problem with short ferromagnetic billets in induction surface hardening applications is considered. An iterative numerical solution based on the impedance boundary condition formulation is developed. In this solution, the full matrix is generated once and stored. The effects of the nonlinear parameters of the magnetic material and the time-dependence temperature rise on the field calculations are considered in estimating the surface impedance. Throughout the total heating time, the latter is updated to the change that occurred in the values of these parameters. The main advantage of this solution is that in each iteration only the coefficients of the matrix which are dependent on the surface impedance have to be updated. Therefore, the CPU time of the solution does not increase proportionally with the number of iterations. Numerical results for the surface power density distribution of a ferromagnetic cylinder coaxial with an induction coil are presented. Also, results showing the corresponding temperature rise and its effect on the nonlinear magnetic permeability are given. Finally, the effect of the nonlinear parameters on the phase angle of the field distributions is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344814
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  • 7
    Electronic Resource
    Electronic Resource
    Computation of high-frequency TM eddy-current losses in magnetic materials (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3863-3865 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The paper deals with the computation of eddy-current losses in linear magnetic materials due to time-harmonic transverse magnetic fields. The variations of the losses in magnetic cylinders with circular and rectangular cross sections are examined over the whole frequency range. The results are generated analytically or by a boundary-elements analysis. Four distinct ranges are identified. It is shown that over a wide frequency range an impedance boundary condition (impedance BC) prevails at the boundary. The magnetic field however is still strongly influenced by the demagnetizing fields. In this range the losses can be approximately evaluated by solving one singular boundary integral equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334896
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  • 8
    Electronic Resource
    Electronic Resource
    Hydroxyl anion chemical ionization screening of liquid fuel (1979)
    s.l. : American Chemical Society
    Analytical chemistry 51 (1979), S. 2232-2235 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50049a039
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  • 9
    Electronic Resource
    Electronic Resource
    Identification of crude oils by selective chemical ionization mass spectrometry (1982)
    s.l. : American Chemical Society
    Analytical chemistry 54 (1982), S. 1304-1308 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00245a008
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  • 10
    Electronic Resource
    Electronic Resource
    High frequency conductivity of the high-mobility two-dimensional electron gas (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 745-747 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We measure the real and imaginary conductivity σ(k=0,ω) of a high-mobility two-dimensional electron gas (2DEG) system at frequencies below and above the momentum scattering rate. The imaginary part of the 2DEG impedance is observed to be inductive, consistent with the Drude model. Using this kinetic inductance, we construct a transmission line by capacitively coupling the 2DEG to an Al Schottky barrier gate separated by 5000 Å from the 2DEG. The measured wave velocity and temperature-dependent damping of this transmission line are in good agreement with a simple Drude model. Exciting these modes is equivalent to exciting a 2D plasma mode strongly modified by the interaction between the 2DEG and the gate. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125881
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