The Sliding Mode Control of Bridge Vibration under a Moving Vehicle

The linear quadratic regulator theory is applied to the active control of bridge vibration conduced by traffic loads. As the bride-vehicle system is the time varying system, the stationary LQR control is not optimal control for the bridge vibration. In bridge vibration under traffic loads, uncertain factors such as the vehicle number, the types of vehicle moving speed etc. exist, therefore, the control theory has to be considered these factors. Then, for these uncertainties, the robust control is expected. This study concerned with the control of bridge vibration under a moving vehicle using by the sliding mode theory that has robustness for the time-varying system. The effectiveness of sliding mode control theory is discussed by the numerical simulations for active and hybrid control of bridge vibration

A Search for Interstellar Carbon Chain Alcohol HC4OH in Star-Forming Region L1527 and Dark Cloud TMC-1

We report a sensitive search for the rotational transitions of the carbon chain alcohol HC4OH in the frequency range of 21.2-46.7 GHz in the star-forming region L1527 and the dark cloud TMC-1. The motivation was laboratory detection of HC4OH by microwave spectroscopy. Despite achieving rms noise levels of several millikelvin in the antenna temperature using the 45 m telescope at Nobeyama Radio Observatory, the detection was not successful, leading to 3 sigma upper limits corresponding to the column densities of 2.0 \times 1012 and 5.6 \times 1012 cm-2 in L1527 and TMC-1, respectively. These upper limits indicate that [HC4OH]/[HC5N] ratios are less than 0.3 and 0.1 in L1527 and TMC-1, respectively, where HC5N is an HC4-chain cyanide and HC4OH is a hydroxide. These ratios suggest that the cyano carbon chain molecule dominates the hydroxyl carbon chain molecule in L1527 and TMC-1. This is contrary to the case of saturated compounds in hot cores, e.g., CH3OH and CH3CN, and can be a chemical feature of carbon chain molecules in L1527 and TMC-1. In addition, the column densities of the "unsubstituted" carbon chain molecule C4H and the sulfur-bearing molecules SO and HCS+ were determined from detected lines in L1527.Comment: Astrophysical Journal, in pres

Laparoscopic Synchronous Resection for Descending Colon Cancer and Tailgut Cyst

A 67-year-old woman underwent polypectomy for a tumor at the descending colon. Pathologically, the tumor was diagnosed as adenocarcinoma with an invasion of 2000 μm. Computed tomography showed a swollen paracolic lymph node and a mass lesion in the presacral space. Magnetic resonance imaging revealed a multio-cular cystic lesion. On diagnosis of descending colon cancer and tailgut cyst, she underwent synchronous lapa-roscopic resection. Histopathologically, the colon cancer was diagnosed as pT1bN1M0, pStage IIIa. The pre-sacral cystic lesion was diagnosed as a nonmalignant tailgut cyst with negative surgical margin. The patient is currently doing well without recurrence at 28 months

The rotational spectrum of the CrF radical in the X(6)Sigma(+) state

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MICROWAVE SPECTROSCOPY OF METAL MONOCYANIDE, MCN (M=Ag,Au)

Author Institution: Department of Chemistry, Faculty of Science, Shizuoka University,; Oya 836, Shizuoka, Japan; Center for Instrumental Analysis, Shizuoka University; Department of Chemistry, Faculty of Science, Shizuoka University,; Oya 836, Shizuoka, JapanThe rotational spectrum of MCN (M=Ag, Au) was observed by employing a source-modulation mi crowave spectrometer. The MCN species was generated in a dc glow discharge through the mixture of CH$_3$CN and Ar by a sputtering reaction with an metal target. The spectrum of MCN was observed in the ground and $\nu_2$ vibrational excited states. The molecular constants derived from the observed transition frequencies were compared with values of theoretical calculations reported in literature

Microwave spectrum of the NI radical in the X-3 Sigma(-) ground state

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