1,357 research outputs found
Reply to âComment on âMicrowave vortex dissipation of superconducting Nd-Ce-Cu-O epitaxial films in high magnetic fieldsââ
We demonstrate with detailed analysis that the criticisms in the preceding Comment by Blackstead are largely due to insufficient understanding of the experimental issues associated with our system or the imposition of formalism that is inapplicable to our experiments. In particular, we distinguish the conventional formalism for âfield-definedâ surface resistance applicable to measurements on samples with filling factors i.e., the ratio of the sample volume to that of the microwave cavity approaching 1 from our âdissipation-definedâ surface resistance derived from first principles for measurements on samples with very small filling factors
Microwave surface resistance of reactively sputtered NbN thin films
The surface resistance of niobium nitride (NBN) thin films was measured at 7.78 and 10.14 GHz in the temperature range of 1.5 to 4.2 K. The films were reactively sputtered on sapphire substrates to a thickness of approximately 1 micron. The surface resistance was determined by measuring the quality factor (Q) of the TE sub 011 mode of a lead-plated copper cavity where the NbN served as one end-cap of the cavity
Report of the Survey of the Schools of Tampa, Florida. Made By The Institute of Educational Research Division of Field Studies Teacher\u27s College, Columbia University
This Survey, conducted in 1926 details the condition of Tampa\u27s public schools and recommendations for their improvement in administration, the number of schools, grade classification, curriculum, and teacher\u27s salaries
Operational parameters for the superconducting cavity maser
Tests of the superconducting cavity maser (SCM) ultra-stable frequency source have been made for the first time using a hydrogen maser for a frequency reference. In addition to characterizing the frequency stability, the sensitivity of the output frequency to several crucial parameters was determined for various operating conditions. Based on this determination, the refrigeration and thermal control systems of the SCM were modified. Subsequent tests showed substantially improved performance, especially at the longest averaging times
Negative priming and stimulus repetition: a reply to Neill and Joordens
Journal ArticleNegative priming is reliably obtained with repeated items, but not with novel items. Here, we review why these stimulus repetition effects raise problems for memory based theories of negative priming. Furthermore, we provide empirical evidence casting doubt on Neill and Joordens's (2002) claimthat perceptual facilitation masks the effects of episodic retrieval with novel items. Finally, we discuss several theoretical and methodological issues raised in the reply by Neill and Joordens. We conclude that a more straightforward interpretation of these stimulus repetition effects is one based on activation-sensitive inhibition
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