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H.-L. Hsu,J.-L. Juang,C.-H. Chou 국제구조공학회 2011 Steel and Composite Structures, An International J Vol.11 No.1
This study experimentally evaluated the seismic performance of steel knee braced frame structures with energy dissipation mechanism. A series of cyclic load tests were conducted on the steel moment resisting frames and the proposed knee braced frames. Test results validated that the demand in the beam-to-column connection designs was alleviated by the proposed design method. Test results also showed that the strength and stiffness of the proposed design were effectively enhanced. Comparisons in energy dissipation between the steel moment resisting frames and the steel knee braced frames further justified the applicability of the proposed method.
H. L. Hsu,J. L. Juang,K. T. Luo 국제구조공학회 2009 Steel and Composite Structures, An International J Vol.9 No.4
This study focuses on the experimental evaluation of the flexural-torsional performance of high strength thin-walled composite members. A series of tests on composite members with various sectional aspect ratios subjected to eccentric cyclic loads were conducted. Test results show that the composite member’s torsional strength could be approximated using a series of linear segments and evaluated using the superposition of the component steel and reinforced concrete responses. It is also validated from the tests that the strength deterioration of members subjected to combined loads is closely related to the aspect ratios of the sections. An interaction expression between the bending and torsion for high strength thin-walled composite members is proposed for engineering practice references.
Measurement of branching fraction and direct CP asymmetry in charmless B+→K+K−π+ decays at Belle
Hsu, C.-L.,Dossett, D.,Sevior, M. E.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Atmacan, H.,Aulchenko, V.,Aushev, T.,Ayad, R.,Badhrees, I.,Bakich, A. M.,Barberio, E.,Behera, P.,Berger, M.,Bhardwaj American Physical Society 2017 Physical Review D Vol.96 No.3
<P>We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-pi(+). The results are based on a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38 +/- 0.40 +/- 0.35) x 10(-6) and -0.170 +/- 0.073 +/- 0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c(2), which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region.</P>
Cross-Coupled Narrow-Band YBCO Filters with Spurious Suppression by Using a Tap-Connection Technique
L. M. Wang,Chung-I G. Hsu,D. S. Hsieh,L. H. Chen,M. L. Chu,S. M. Chiou 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.5I
Narrow-band microstrip cross-coupled band-pass filters based on a quadruplet geometry were designed for wireless-communication applications. High-Tc superconducting (HTS) filters were fabricated by patterning YBa2Cu3Oy (YBCO) films double-side deposited on 20-mm-square and 0.5- mm-thick LaAlO3 substrates. The filters with skew-symmetric feed were designed with a center frequency at 1.9 GHz and a bandwidth of 20 MHz. The inductive coupling between the non-adjacent resonators produced a pair of transmission zeros in the frequency response. Also observed was an additional pair of transmission zeros that enhance the out-of-band rejection characteristics. The realized YBCO filter showed a center frequency at 1.925 GHz with a bandwidth of 20 MHz and a minimum insertion loss of about 0.74 dB. Furthermore, a tap-connection technique was applied to cross-coupled HTS band-pass filters so as to suppress the second and/or the third passbands, which were spurious and undesirable. To improve the out-of-band performance of the band-pass filters, we tapped the input/output microstrip lines at certain locations. In this research, we confirmed that by tapping somewhere along the input/output microstrip lines, a /4 open stub or a /2 short stub, where refers to the guided wavelength at 2fo or 3fo, may effectively suppress harmonics at 2fo and/or 3fo by more than 25 dB. The simulated and the experimental results are discussed.