366 research outputs found
Water temperature mooring (M1-M20) data along the central California inner shelf
No full text<p>Water emperature Mooring Data M1-M1 (ten minute averages)</p>
<p>The data were collected as part of the Office of Naval Research Inner Shelf DRI in the Fall of 2017</p>
<p>The data are used in the manuscript entitled</p>
<p>"Statistical analysis of vertical and alongshore temperature variability in the subtidal, diurnal, and semidiurnal frequency bands along the central California inner shelf"</p>
<p>by </p>
<p>Jamie H. MacMahan, Falk Feddersen, Thomas M. Freismuth, Matt K. Gough, and Michael Kovatch</p>
<p> </p>
QUANTUM CHAOLOGY IN THE DISCRETE SELF-TRAPPING EQUATION IN THE PRESENCE OF ARNOLD DIFFUSION
No full textThe presence of Arnold diffusion enables a numerical test of a semiclassical conjecture by Berry and Robnik. Our results confirm the conjecture in almost regular and strongly chaotic regions of phase space. In the weakly chaotic regions a possible failure of the conjecture should not be overlooked
Impact of tropical SST variations on the linear predictability of the atmospheric circulation in the Atlantic/European region
No full textSeasonal mean values of tropical Sea Surface Temperature (SST) and Atlantic/European Mean Sea Level Pressure (MSLP) from a 301-year coupled ocean/atmosphere model run are analysed statistically. Relations between the two fields are identified on both interannual and interdecadal timescales. It is shown that tropical SST variability affects Atlantic/European MSLP in winter. In particular, there appears to be a statistically significant relation, between the leading modes of variability, the El Niño/Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO). During cold ENSO (La Niña) years the NAO tends to be in its positive phase, while the opposite is the case during warm ENSO (El Niño) years, although to a lesser extent. Similar analyses that are presented for gridded observational data, confirm this result, although here tropical Atlantic SST appears to be stronger related to the NAO than tropical Pacific SST. The linear predictability of a model simulated NAO index is estimated by making statistical predictions that are based on model simulated tropical SST. It is shown that the predictive skill is rather insensitive to the length of the training period. On the other hand, the skill score estimate can vary significantly as a result of interdecadal variability in the climate system. These results are important to bear in mind when making statistical seasonal forecasts that are based on observed SST.PublishedJCR Journalope
AC loss in MgB2-based fully superconducting electric machines
No full textSuperconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01The student, Matthew Feddersen, accepted the attached license on 2017-04-19 at 11:23.The student, Matthew Feddersen, submitted this Thesis for approval on 2017-04-19 at 11:29.This Thesis was approved for publication on 2017-04-24 at 10:06.DSpace SAF Submission Ingestion Package generated from Vireo submission #10828 on 2017-08-10 at 15:05:56Made available in DSpace on 2017-08-10T20:33:03Z (GMT). No. of bitstreams: 3
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MS Thesis.zip: 29996724 bytes, checksum: 99612f5d6b3615aafeadd15c99fd125d (MD5)
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Previous issue date: 2017-04-24Embargo set by: Colleen Fallaw for item 102776
Lift date: 2019-08-10T21:27:21Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 102776 on 2019-08-11T09:15:32Z
Den Tod Jhres teuersten Freundes und Lieblings, Des Hochaedlen und Wolgelarten Herrn Herrn Johann Georg Hänschens Der Rechte rümlichst Beflissenen klagten unter den Empfindungen der zärtlichen Wemut Desselben tiefgebeugte Freunde und Vererer. Joannes Aegidius Bendixen aus Schleswig, d. H. G G. Beflissener. Christian Clausen aus Flensburg, d. H. G. G. Beflissener. Peter Feddersen aus Flensburg, d. H. G. G. Beflissener
No full textClassical and quantum analysis of chaos in the discrete self-trapping equation
No full textWe study the discrete self-trapping model, for three degrees of freedom. The fraction of the energy shell of the phase space that is chaotic is evaluated directly from the classical motion and also from the exact energy levels of the corresponding quantum system. The correspondence between classical and quantum results is discussed
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