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KAMEYA, O.,TSUBOI, M.,ASAKI, Y.,YONEKURA, Y.,MIYAMOTO, Y.,KANEKO, H.,SETA, M.,NAKAI, N.,MIYOSHI, M.,TAKABA, H.,WAKAMATSU, K.,FUKUZAKI, Y.,MORIMITSU, T.,SEKIDO, M. The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
We have been performing daily VLBI monitoring of the flux density of Sagittarius (Sgr) $A^{\ast}$ at 22 GHz from February 2013 to August 2014 using a sub-array of the Japanese VLBI Network (JVN). The purpose of this monitoring is to explore the flux density variability at daily time resolution for a period longer than one year with the G2 cloud approaching. The flux density of Sgr $A^{\ast}$ is basically stable during the observational period, though there are some small variations. The average and scattering range are consistent with the previously observed values. We have observed no strong flare of Sgr $A^{\ast}$ although it is near the expected peri-center passing.
LaBonte, Melissa J.,Yang, Dongyun,Zhang, Wu,Wilson, Peter M.,Nagarwala, Yasir M.,Koch, Kevin M.,Briner, Colleen,Kaneko, Tomomi,Rha, Sun-Young,Gladkov, Oleg,Urba, Susan G.,Sakaeva, Dina,Pishvaian, Mich American Association for Cancer Research 2016 Molecular Cancer Therapeutics Vol.15 No.9
<P>An exploratory phase II biomarker-embedded trial (LPT109747; NCT00526669) designed to determine the association of lapatinib-induced fluoropyrimidine gene changes with efficacy of lapatinib plus capecitabine as first-line treatment for advanced gastric cancer or gastroesophageal junction adenocarcinoma-independent of tumor HER2 status. Tumor biopsies obtained before and after 7- day lapatinib (1,250 mg) to analyze changes in gene expression, followed by a 14-day course of capecitabine (1,000 mg/m(2) twice daily, 14/21 days) plus lapatinib 1,250 mg daily. Blood samples were acquired for pharmacokinetic analysis. Primary clinical objectives were response rate (RR) and 5-month progression-free survival (PFS). Secondary objectives were overall survival (OS), PFS, time to response, duration of response, toxicity, and identification of associations between lapatinib pharmacokinetics and biomarker endpoints. Primary biomarker objectives were modulation of 5FU- pathway genes by lapatinib, effects of germline SNPs on treatment outcome, and trough steady-state plasma lapatinib concentrations. Sixty-eight patients were enrolled; (75% gastric cancer, 25% gastroesophageal junction). Twelve patients (17.9%) had confirmed partial response, 31 (46.3%) had stable disease, and 16 (23.9%) had progressive disease. Median PFS and OS were 3.3 and 6.3 months, respectively. Frequent adverse events included diarrhea (45%), decreased appetite (39%), nausea (36%), and fatigue (36%). Lapatinib induced no changes in gene expression from baseline and no significant associations were found for SNPs analyzed. Elevated baseline HER3 mRNA expression was associated with a higher RR (33% vs. 0%; P = 0.008). Lapatinib plus capecitabine was well tolerated, demonstrating modest antitumor activity in patients with advanced gastric cancer. The association of elevated HER3 and RR warrants further investigation as an important player for HER-targeted regimens in combination with capecitabine. (C)2016 AACR.</P>
Extending the dynamic range of electronics in a Time Projection Chamber
Estee, J.,Lynch, W.G.,Barney, J.,Cerizza, G.,Jhang, G.,Lee, J.W.,Wang, R.,Isobe, T.,Kaneko, M.,Kurata-Nishimura, M.,Murakami, T.,Shane, R.,Tangwancharoen, S.,Tsang, C.Y.,Tsang, M.B.,Hong, B.,Lasko, P. Elsevier 2019 Nuclear instruments & methods in physics research. Vol.944 No.-
<P><B>Abstract</B></P> <P>When Time Projection Chambers (TPCs) are used in low to intermediate heavy ion collisions, the mass and momentum range of the emitted particles cover a wide range in energy losses. Many TPC readout electronics currently only have a single gain output with a fixed dynamic range. In a recent set of experiments using the SAMURAI Pion-Reconstruction and Ion-Tracker (S π RIT) TPC, it was important to simultaneously measure relativistic pions and heavy ion tracks from the same collisions. As the ionization from a track’s energy loss is collected and multiplied by the anode wires, a distribution of image charges is induced on the TPC read-out pads. If the avalanche on a wire is large enough, the charge collected by pads directly underneath will saturate the readout electronics; pads farther away in the distribution will not be saturated. Using these unsaturated pads and the known pad distribution function, we can estimate the charge on saturated pads, increasing the dynamic range by a factor of 5.</P>
hajime Arimoto,F. Sano,G. Motojima,H. Yamazaki,H. Nakamura,H. Yabutani,H. Kitagawa,H. Okada,J. Arakawa,K. Kondo,K. Ohashi,K. Nagasaki,M. Yamada,M. Uno,M. Kikutake,M. Kaneko,N. Watanabe,N. Nishino,N. S 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The measurement of D, CII and CIII line spectral profiles and the CD band spectrum from the vicinity of a test limiter surface is performed in Heliotron J test limiter experiments. With deep insertion of the limiter, there is a localized intense region of the D, CII and CIII line intensity in the limiter surface, and the CD band spectrum is observed at this region. It is considered that the deuterium ion flux and heat load concentrate at this region and enhance carbon impurity generation.r_che
Myelin injury without astrocytopathy in neuroinflammatory disorders with MOG antibodies
Kaneko, Kimihiko,Sato, Douglas Kazutoshi,Nakashima, Ichiro,Nishiyama, Shuhei,Tanaka, Satoru,Marignier, Romain,Hyun, Jae-Won,Oliveira, Luana Michelli de,Reindl, Markus,Seifert-Held, Thomas,Sepulveda, M BMJ 2016 Journal of neurology, neurosurgery and psychiatry Vol.87 No.11
A Study on Ferro Fluid Dynamic Bearing Spindel Characteristics by High Frequency Vibration Ssystem
M. Miwa,H. Harita,T. Nishigami,R. Kaneko,H. Unozawa 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
Ball bearings (BB) are generally used in spindles of disk drives at present, but they have been known that BB generate high frequency vibration. Fluid dynamic bearings (FDB) having high-rotational accuracy and small vibration characteristics have been developed as next generation spindles. Especially, a ferro fluid bearing (FFB) spindle has the advantage to prevent leakage and dispersion of lubricating oil using a ferro seal. In this study, we measured damping characteristics and frequency characteristics of these bearing spindles using a high-frequency vibration base. High frequency excitation was added to these bearing spindles mounted on the vibration base, and we proved that FFB and FDB spindles have effective damping..