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  • Communications and Radar  (1)
  • PACS. 47.54.+r Pattern selection; pattern formation – 61.30.-v Liquid crystals – 47.20.Ky Nonlinearity (including bifurcation theory)  (1)
  • cables  (1)
  • human capital  (1)
  • nonlinear dynamics  (1)
  • 2000-2004  (5)
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Year
  • 1
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    Shuttle Imaging Radar Application in Geology (2000)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Keywords: Communications and Radar
    Type: International Geological Congress; Rio de Janeiro; Brazil
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
    Electronic Resource
    Electronic Resource
    Electric Nusselt number characterization of electroconvection in nematic liquid crystals (2002)
    Springer
    The European physical journal 26 (2002), S. 515-520 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 47.54.+r Pattern selection; pattern formation – 61.30.-v Liquid crystals – 47.20.Ky Nonlinearity (including bifurcation theory)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We develop a characterization method of electroconvection structures in a planar nematic liquid crystal layer by a study of the electric current transport. Because the applied potential difference has a sinusoidal time dependence, we define two electric Nusselt numbers corresponding to the in-phase and out-of-phase components of the current. These Nusselt numbers are predicted theoretically using a weakly nonlinear analysis of the standard model. Our measurements of the electric current confirm that both numbers vary linearly with the distance from onset until the occurence of secondary transitions. A systematic comparison between our theoretical and experimental results, using no adjusted parameters, demonstrates moderate agreement, but discrepancies remain. Electric transport measurements during electroconvection represent a quantitative test of the standard model completely independent from optical probes. Thus, the technique described here can be a useful complement to traditional structural measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e20020121
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Trade Secrets, Firm-Specific Human Capital, and Optimal Contracting (2000)
    Springer
    European journal of law and economics 9 (2000), S. 51-73 
    Details
    ISSN: 1572-9990
    Keywords: trade secrets ; labor contracts ; human capital
    Source: Springer Online Journal Archives 1860-2000
    Topics: Law , Economics
    Notes: Abstract Trade secrets are innovations jointly produced by firms and employees that are generally not protected by patents. They are commonly protected within the framework of labor contracts, where an obligation of confidentiality is imposed upon the employee. Specifically this obligation applies to the employee even after he has left the employer for a period of time determined in the contract, known as a “cooling off” period. Often employees are prohibited not only from revealing trade secrets, but also from utilizing their specific human capital developed at the original place of employment in competitor firms during this period. Their specific human capital is in effect inseparable from the trade secret. Failure to protect the trade secret will result in its revelation and its becoming public and hence worthless for the innovator. The inability of an employee to reveal trade secrets and utilize his specific human capital after leaving his place of employment imposes costs and losses upon him. Some form of compensation will be paid for these contingent losses within the employment contract. Employers know that the longer the “cooling off” period imposed upon employees, the greater employees must be compensated for this in the contract. Longer “cooling off” periods thus cost the employer more, but also enable him to earn greater rents from the innovation itself. In this paper profit-maximizing periods of trade secret protection are derived, based on these two countervailing factors, and comparative statics exercises are performed. How the selection of profit-maximizing periods of trade secret protection when the incidence of resignation is itself affected by contract parameters and incentives is explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018759701127
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Large Motions of a Moored Floating Breakwater Modeled as an Impact Oscillator (2000)
    Springer
    Nonlinear dynamics 23 (2000), S. 319-334 
    Details
    ISSN: 1573-269X
    Keywords: bouncing ball ; breakwater ; cables ; impact oscillator
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Two-dimensional motions of a floating breakwater moored to thesea floor by two cables are considered. The breakwater is modeled bothas a point mass and as a rigid body. The mooring lines are assumed tohave no effect on the breakwater when they are slack, and to provide aninstantaneous impulsive force when they become taut, analogous to animpact oscillator or a ball bouncing on a rigid surface. The axialcomponent of the velocity is reduced at this instantaneous tautcondition. Fluid inertia and damping are not included, and the waveforces are assumed to be harmonic. A critical force is defined, and theeffects of the forcing frequency, the coefficient of restitution, andthe shape and size of the body on the critical force are examined.Trajectories of the motion are plotted and the impact velocities arecomputed and analyzed. Knowledge of the number and magnitude of theseimpacts is useful in assessing fatigue of the mooring lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008302432739
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  • 5
    Electronic Resource
    Electronic Resource
    Snap Loads in Mooring Lines During Large Three-Dimensional Motions of a Cylinder (2000)
    Springer
    Nonlinear dynamics 23 (2000), S. 271-284 
    Details
    ISSN: 1573-269X
    Keywords: breakwater ; cylinder ; mooring lines ; nonlinear dynamics ; snap loads ; three-dimensional motions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The nonlinear dynamic response of a moored, rigid, horizontalcylinder is considered. Use of the structure as a breakwater or a waveenergy device is envisaged. Inertial and nonlinear damping effects ofthe external fluid are not included, i.e., a ‘dry’ analysis is carriedout. The four mooring lines are modeled as massless springs which onlyresist tension. The six coupled equations of motion of the cylinder arederived and solved numerically. Linear free vibrations are treatedfirst, followed by the nonlinear three-dimensional response to harmonicforces simulating the action of waves. Normal, longitudinal, and obliqueforces are considered, and time histories of the displacements andmooring line tensions are computed. Snap loads tend to occur in thelines when they are alternately slack and taut. The effects of theforcing direction, amplitude, and frequency are investigated. Chaoticmotions are observed in some cases, and the structure collapses forsufficiently large forcing amplitudes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008368427878
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