1,397 research outputs found
Gustav Leonhardt in an organ recital at Reynolda Presbyterian Church, 1964.
No full textGustav Leonhardt in an organ recital at Reynolda Presbyterian Church, 1964.WSJ 4-5-64 p.A10
Staff sunset review of the Oregon Liquor Control Commission
No full textprepared by: Ken Elverum, Deputy Director, Fred Leonhardt, Research Analyst.Title from PDF cover (viewed on August 21, 2020).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Estimating inflow to a combined sewer overflow structure with storage tank in real time: Evaluation of different approaches
No full textThe performance assessment of storage tanks and combined sewer overflow (CSO) structures in sewer systems requires knowledge of the total inflow from the catchment during rainfall events. Many structures are, however, only equipped with sensors to measure water level and/or outflows. Based on the geometry of the tank, expressed as a level-storage relationship, inflow can be calculated from these data using a simple conceptual storage model. This paper compares a deterministic and a Bayesian approach for estimating the inflow to a CSO structure from measurements of outflows and water level. The Bayesian approach clearly outperforms the deterministic estimation which is very sensitive to measurement errors. Although computationally more demanding, the use of a simple linear storage model allows the online application of the Bayesian approach to repeatedly estimate inflow in short time intervals of a few minutes. The method could thus be used as an online software sensor for inflow to storage structures in sewer systems
Schulische Inklusion Hörgeschädigter - ausgewählte Ergebnisse aus einem Forschungsprogramm
No full textStima in real-time della portata in ingresso ad uno scaricatore di piena dotato di vasca di laminazione – valutazione di differenti approcci
No full textEstimating Inflow to a CSO Structure With Storage Tank in Real Time: Evaluation of Different Approaches
No full textDevelopment of Shear Connections in Steelconcrete Composite Structures
No full textDifferent types of shear connectors and modelling techniques are presented. Basic research conducted or presented after year 2000 is taken into consideration, following the idea of concrete dowel implemented in the form of perfobond strip at the beginning of the 1980s by F. Leonhardt. The latest research in the field of continuous shear connectors applied in bridges is high lited with special focus at the composite dowel shear connection, as it seems to be the most modern solution being strongly introduced to the industry. Final shape of composite dowel shear connection is presented.Przedstawiono typy łączników ścinanych oraz sposoby modelowania. Odniesiono się do badań prowadzonych po 2000 r., pokazano, jak rozwijał się pomysł, wprowadzony w postaci tzw. listwy perfobond, którego autorem był w 1980 r. F. Leonhardt. Najnowsze aplikacje ciągłych łączników ścinanych w mostach wykorzystują łączniki w formie tzw. composite dowels. Ostateczny kształt tego typu łączników przedstawiono w pracy
Montefiore March
No full textmarch; sectionalpianoDedicated to the Hebrew Charity Ball Association of Philadelphia, January 29, 1885Johns Hopkins University, Levy Sheet Music Collection, Box
034, Item 025Composed by W. JonasKassler's Combined Orchestras at the Philadelphia Academy of MusicTheo. Leonhardt & Son Phila
Hawking radiation in dispersive media
No full textHawking radiation, despite its presence in theoretical physics for over thirty years, remains elusive and undetected. It also suffers, in its original context of gravitational black holes, from conceptual difficulties. Of particular note is the trans-Planckian problem, which is concerned with the apparent origin of the radiation in absurdly high frequencies. In order to gain better theoretical understanding and, it is hoped, experimental verification of Hawking radiation, much study is being devoted to systems which model the spacetime geometry of black holes, and which, by analogy, are also thought to emit Hawking radiation. These analogue systems typically exhibit dispersion, which regularizes the wave behaviour at the horizon but does not lend itself well to analytic treatment, thus rendering Hawking’s prediction less secure. A general analytic method for dealing
with Hawking radiation in dispersive systems has proved difficult to find.
This thesis presents new numerical and analytic results for Hawking emission spectra in dispersive systems. It examines two black-hole analogue systems: it begins by introducing the well-known acoustic model, presenting some original results in that context; then, through analogy with the acoustic model, goes on to develop the lesser-known fibre-optical model. The following original results are presented in the context of both of these models:
• an analytic expression for the low-frequency temperature is found for a hyperbolic tangent background profile, valid in the entire parameter space; it is well-known that the spectrum is approximately thermal at low frequencies, but a universally valid expression for the corresponding temperature is an original development;
• an analytic expression for the spectrum, valid over almost the entire frequency
range, when the velocity profile parameters lie in the regime where the low-frequency
temperature is given by the Hawking prediction; previous work has focused on the
low-frequency thermal spectrum and the characterization of the deviations from
thermality, rather than a single analytic expression; and
• a new unexplored regime where no group-velocity horizon exists is examined; the
Hawking spectra are found to be non-zero here, but also highly non-thermal, and
are found, in the limit of small deviations, to vary with the square of the maximum
deviation; the analytic expression for the case with a horizon is found to carry over
to this new regime, with appropriate modifications.
Furthermore, the thesis examines the results of a classical frequency-shifting experiment
in the context of fibre-optical horizons. The theory of this process is presented for both a constant-velocity and a constantly-decelerating pulse, the latter case taking account of the Raman effect. The resulting spectra are at least qualititively explained, but there is a discrepancy between theory and experiment that has not yet been accounted for
Montefiore March
No full textmarch; sectionalpianoDedicated to the Hebrew Charity Ball Association of Philadelphia, January 29, 1885Johns Hopkins University, Levy Sheet Music Collection, Box
034, Item 025Composed by W. JonasKassler's Combined Orchestras at the Philadelphia Academy of MusicTheo. Leonhardt & Son Phila
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