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Journals and Conferences
This paper proposes an improved maximum power point tracking (MPPT) method for wind power systems. The proposed method combines hysteresis control with tip speed ratio (TSR) control using a power coefficient curve. It has fast dynamic characteristics with the TSR control using data obtained from an anemometer. Moreover it can track the maximum power point… (More)
F. Boehm, J. Busenitz, B. Cook, G. Gratta, H. Henrikson, J. Kornis, D. Lawrence, K. B. Lee, K. McKinny, L. Miller, V. Novikov, A. Piepke, B. Ritchie, D. Tracy, P. Vogel, Y-F. Wang, and J. Wolf Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 Department of Physics and Astronomy, Arizona State University, Tempe, Arizona… (More)
F. Boehm,3 J. Busenitz,1 B. Cook,3 G. Gratta,4 H. Henrikson,3 J. Kornis,1 D. Lawrence,2 K. B. Lee,3 K. McKinny,1 L. Miller,4 V. Novikov,3 A. Piepke,1,3 B. Ritchie,2 D. Tracy,4 P. Vogel,3 Y-F. Wang,4 and J. Wolf1 1Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 2Department of Physics and Astronomy, Arizona State… (More)
Using data from the FOCUS experiment we analyze the D+π− and D0π+ invariant mass distributions. We measure the D∗0 2 mass MD∗0 2 = (2464.5 ± 1.1 ± 1.9)MeV/c2 and width ΓD∗0 2 = (38.7±5.3±2.9)MeV/c2, and theD 2 massMD∗+ 2 = (2467.6± 1.5± 0.76)MeV/c2 and width ΓD∗+ 2 = (34.1± 6.5± 4.2)MeV/c2. We find evidence for broad structures over background in both the… (More)
We apply a genetic programming technique to search for the doubly Cabibbo suppressed decays Λc → pKπ− and Ds → KKπ−. We normalize these decays to their Cabibbo favored partners and find BR(Λc → pKπ)/BR(Λc → pKπ+) = (0.05 ± 0.26 ± 0.02)% and BR(Ds → KKπ)/BR(Ds → KKπ+) = (0.52 ± 0.17 ± 0.11)% where the first errors are statistical and the second are… (More)
The molecular mechanisms of the carcinogenic process of gastric cancer have not been fully understood yet. In order to know whether c-Ha-ras gene is being involved in the process of gastric carcinogenesis, 8 gastric cancer cell lines, 8 cases of gastric cancer and same number of adjacent dysplasia were analyzed for the presence of mutation at codon 12, 13… (More)
We review genetic programming principles, their application to FOCUS data samples, and use the method to study the doubly Cabibbo suppressed decay D → Kπ+π− relative to its Cabibbo favored counterpart, D → Kππ. We find that this technique is able to improve upon more traditional analysis methods. To our knowledge, this is the first application of the… (More)
We describe a silicon microstrip detector interleaved with segments of a beryllium oxide target which was used in the FOCUS photoproduction experiment at Fermilab. The detector was designed to improve the vertex resolution and to enhance the reconstruction efficiency of short-lived charm particles.
We present a Kπ mass spectrum analysis of the four-body semileptonic charm decay D+ → K−π+μ+ν in the range of 0.65 GeV/c2 < mKπ < 1.5 GeV/c 2. We observe a non-resonant contribution of 5.30 ± 0.74 − 0.96% with respect to the total D+ → K−π+μ+ν decay. For the K∗(892)0 resonance, we obtain a mass of 895.41 ± 0.32 − 0.43 MeV/c 2, a width of 47.79 ± 0.86 − 1.06… (More)
Using data collected by the Fermilab experiment FOCUS, we measure the lifetime of the charmed baryon Ξc using the decay channels Ξ o c → Ξ π and Ξc → Ω K. From a combined sample of 110 ± 17 events we find τ(Ξc) = 118 +14 − 12 ± 5 fs, where the first and second errors are statistical and systematic, respectively.