Search results for "Lock in"

showing 3 items of 3 documents

Does brick size matter? Albert G. Keller on another QWERTY story

2023

In his seminal ‘‘Clio and the Economics of Qwerty’’, Paul David indicates Thorstein Veblen’s famous discussion of the British system of coal rail haulage as an intellectual antecedent to the idea of lock in. This note documents how Albert G. Keller, a Yale sociologist contemporary of Veblen, had presented a similar argument in connection to the establishment of a brick tax in England and its effects on the size of bricks. Like Veblen, Keller used this illustration to emphasize the inertia exercised by certain institutional conditions.

QWERTY keyboard; Institutional lag; Lock inHistoryEconomics and EconometricsPolymers and PlasticsLock inBusiness and International ManagementInstitutional lagQWERTY keyboardQWERTY keyboard Institutional lag Lock inIndustrial and Manufacturing EngineeringFinanceEconomics Letters
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Implementation of a fast and low cost IR-NDT technique by means of a Square Pulse modulated Lock-In Thermography

2012

This work describes the development of an IR-NDT procedure based on a lock-in signal treatment in the frequency domain to obtain phase-contrast defect signatures. Heat stimulation is obtained by periodically shattering a common low-power halogen lamp. The delivered heat is then modulated as a train of square waves with multi-frequency harmonic content. The proposed lock-in algorithm is able to selectively retrieve phase and amplitude information at various frequencies of the acquired temperature, acting also as a narrow band filter to improve defect-signature to noise ratio. The procedure is implemented and evaluated by means of low cost IR equipment to investigate artificially defected thi…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineInfrared Thermography NDT Lock In Thermograpghy Glass Fibre ReinforcedProceedings of the 2012 International Conference on Quantitative InfraRed Thermography
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A comparison of injection pain with articaine with adrenaline, prilocaine with phenylpressin and lidocaine with adrenaline

2008

Kutuk, Nukhet/0000-0001-6563-1899 WOS: 000259667200006 PubMed: 18587306 Objective: The objective of the present study was to investigate the pain on injection of articaine with adrenaline, prilocaine with phenylpressin, and lidocaine with adrenaline. Study Design: The study sample was comprised of 497 consecutively seen patients received 497 maxillary buccal infiltration injections or inferior alveolar block injections of 4% articaine with 1: 200.000 adrenaline, 3% prilocaine with 1.08mcg phenylpressin, or 2% lidocaine with 1: 100.000 adrenaline. Immediately after the injection, patients were asked to rate their injection pain on a six-point scale. Results: There were no significant differe…

articaineinferior alveolar block injectionlidocaineUNESCO::CIENCIAS MÉDICASSumer M. Misir F. Celebi N. Muglali M. -A comparison of injection pain with articaine with adrenaline prilocaine with phenylpressin and lidocaine with adrenaline- MEDICINA ORAL PATOLOGIA ORAL Y CIRUGIA BUCAL cilt.13 2008maxillary local anesthesiainjection painprilocaine:CIENCIAS MÉDICAS [UNESCO]
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