Results 11 to 20 of about 283,894 (302)
Lock-in & Break-out from Technological Trajectories: Modeling and policy implications [PDF]
, 2009 Arthur [1,2] provided a model to explain the circumstances that lead to technological lock-in into a specific trajectory. We contribute substantially to this area of research by investigating the circumstances under which technological development may ...
Dolfsma, Wilfred, Leydesdorff, Loet
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Lock-in of the vortex-induced vibrations of a long tensioned beam in shear flow [PDF]
, 2011 The occurrence of lock-in, defined as the local synchronization between the vortex shedding frequency and the cross-flow structural vibration frequency, is investigated in the case of a tensioned beam of length to diameter ratio 200, free to move in both
Bourguet, Rémi +2 more
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Hold-in, pull-in, and lock-in ranges of PLL circuits: rigorous mathematical definitions and limitations of classical theory [PDF]
, 2015 The terms hold-in, pull-in (capture), and lock-in ranges are widely used by engineers for the concepts of frequency deviation ranges within which PLL-based circuits can achieve lock under various additional conditions. Usually only non-strict definitions
Kuznetsov, N. V. +3 more
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A simple microcontroller based digital lock-in amplifier for the detection of low level optical signals [PDF]
, 2002 Traditionally digital lock-in amplifiers sample the input signal at a rate much higher than the lock-in reference frequency and perform the lock-in algorithm with high-speed processors.
Dorrington, Adrian A. +1 more
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The Impact of Perceived Stress and Coping Adequacy on the Health of Nurses: A Pilot Investigation
Nursing Research and Practice, 2016 Stress and coping abilities influence the health and work performance of nurses. However, little is known about the combined influence of stress perception and perceived coping adequacy and its impact on the health of nurses.
Timothy R. Jordan +2 more
doaj +1 more source
Noise increase phenomenon of the air flow through a perforated metal plate
Nihon Kikai Gakkai ronbunshu, 2019 The aerodynamic noise generated from a perforated metal plate varied by air-flow direction. In the case of expansion type perforated metal plate, it generates very large level aerodynamic noise with a prominent peak in the frequency characteristic.
Hiroki MATSUMOTO +2 more
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Locking Timestamps versus Locking Objects [PDF]
Proceedings of the 2018 ACM Symposium on Principles of Distributed Computing, 2018 We present multiversion timestamp locking (MVTL), a new genre of multiversion concurrency control algorithms for serializable transactions. The key idea behind MVTL is simple: lock individual timestamps instead of locking objects. After presenting a generic MVTL algorithm, we demonstrate MVTL's expressiveness: we give several simple MVTL algorithms ...
Marcos K. Aguilera +3 more
openaire +3 more sources
Detection of composite damage by IR NDT using ultrasonic and optic excitation
MATEC Web of Conferences, 2019 The submitted paper presents experience with detection of damaged composites by means of an ultrasonic excitation system in comparison with an optic system of excitation. In case of the ultrasonic excitation system is a high-frequency signal modulated by
Dekýš Vladimír +4 more
doaj +1 more source
Journal of Fluid Science and Technology, 2009 In this study, the flow features of vortex shedding from a pair of parallel arranged circular cylinders of unequal diameter oscillating along the direction of the flow were observed by visualizing water flow experiment at the ranges of the frequency ...
Yoshifumi YOKOI, Keiko HIRAO
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Product Durability in Markets with Consumer Lock-in [PDF]
, 2009 This paper examines a two-period duopoly where consumers are locked-in by switching costs that they face in the second period. The paper's main focus is on the question of how the consumer lock-in affects the firms' choice of product durability.
Langenberg, Tobias
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