Results 1 - 10 of 21088
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[en] The dynamic Takács model is used for the description of hysteresis loops in a thick non-oriented steel sheet. The extended description is achieved by a modification of the relationship for the effective field. The proposed model extension is equivalent to the famous Chua description.
[en] In this paper we prove the Marsden-Misiolek-Ortega-Perlmutter-Ratiu Stages Hypothesis, which is a sufficient condition for a general reduction by stages theorem. Our Lie-algebraic approach allows us to prove this conjecture in a general case (not only for semidirect products of groups with cocycle) and to simplify the proof of a general reduction by stages theorem (with some modifications). Bibliography: 8 titles
[en] Correlated neutron data analyzed using the Feynman Variance-to-Mean method are can be used to assess the multiplication and mass of special nuclear material (SNM) systems. After list-mode data are acquired, the multiplication and mass can be determined using detector parameters. This work compares data sets that were measured to simulated data using recent MCNP list-mode modifications. In addition, both sets of data are analyzed using both measured and simulated parameters to infer the system multiplication.
[en] When searching for new physics effects, collaborations will often wish to publish upper limits and intervals with a lower confidence level than the threshold they would set to claim an excess or a discovery. In this paper a modification to the Feldman-Cousins method is proposed that allows for a transition from one-sided upper confidence limits for null results and a two-sided confidence intervals for non-null results at any given specified threshold chosen to define the observation of a signal, while maintaining exact coverage.
[en] A procedure for unfilling used lithium lenses to has been described in Pbar Note 664. To date, the procedure has been used to disassemble lenses 20, 21, 17, 18, and 16. As a result of this work, some parts of the original procedure were found to be time consuming and ineffective. Modifications to the original procedure have been made to streamline the process and are discussed in this note. The revised procedure is included in this note.
[en] We revise the method of periodic metamaterials homogenization initially proposed by Pendry, Holden, Robbins and Stewart (PHRS). The shortcomings of the PHRS derivation of the basic formulae of their method are outlined, subtleties of the method implementation are discussed and the range of validity of both the PHRS method and its later modifications are analyzed. We then give a rigorous derivation of the PHRS averaging formulae in the static approximation and modify the PHRS method to account for the phase advance of an incident wave across the unit cells of metamaterials beyond the quasistatic regime. The advantages of our proposed method are illustrated by numerical calculations of the effective parameters of some periodic metamaterials. (paper)
[en] An alternate side coupled structure (SCS) is being investigated. Comparisons are made to the traditional SCS. Mechanical comparisons include the relative cost and ease of fabrication. This discussion also addresses the use of CNC machining. Electrical comparisons include field distributions and coupling constants. Measured and numerical data are presented. The coupling constant of the alternate SCS is adjusted by independently changing either the separation of the coupling and accelerating cavity centers or the length of the slot. These two parameters are not independent in the traditional SCS design. 4 refs., 5 figs
[en] The technique using two detectors for assay of radioactive waste drums was given by Cesana et al. (1993). In this paper a modification to this method is proposed. In comparison with the former it has some advantages as: the statistical and maximum systematic errors are smaller, activity in a drum can be estimated quickly, and its use is more convenient in practice. (Author)