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김영복(Y. B. Kim),H. Kawai,최용운(Y. W. Choi),이권순(K. S. Lee),채규훈(G. H. Chae) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In general, the swing motion of the crane is controlled and suppressed by activating the trolley motion. In many papers reported by us, we suggested a new type of anti-sway control system of the crane. In the proposed control system, a small auxiliary mass(moving-mass) is installed on the spreader and the swing motion is controlled by moving the auxiliary mass. The actuator reaction against the auxiliary mass applies inertial control forces to the container in order to reduce the swing motion in the desired manner. The measuring system is based on laser sensor or others. However it is not so useful in real world. In this paper, we use the camera based measurement system to measure sway motion of the crane. And the H∞ based control technique is applied to suppress swing motion of the crane. And the experimental result shows that the proposed control system is useful and robust to disturbances.
Kee, H J,Kim, J-R,Joung, H,Choe, N,Lee, S E,Eom, G H,Kim, J C,Geyer, S H,Jijiwa, M,Kato, T,Kawai, K,Weninger, W J,Seo, S B,Nam, K-I,Jeong, M H,Takahashi, M,Kook, H Macmillan Publishers Limited 2012 Cell death and differentiation Vol.19 No.1
Skeletal myogenesis is precisely regulated by multiple transcription factors. Previously, we demonstrated that enhancer of polycomb 1 (Epc1) induces skeletal muscle differentiation by potentiating serum response factor (SRF)-dependent muscle gene activation. Here, we report that an interacting partner of Epc1, ret finger protein (RFP), blocks skeletal muscle differentiation. Our findings show that RFP was highly expressed in skeletal muscles and was downregulated during myoblast differentiation. Forced expression of RFP delayed myoblast differentiation, whereas knockdown enhanced it. Epc1-induced enhancements of SRF-dependent multinucleation, transactivation of the skeletal α-actin promoter, binding of SRF to the serum response element, and muscle-specific gene induction were blocked by RFP. RFP interfered with the physical interaction between Epc1 and SRF. Muscles from rfp knockout mice (Rfp<SUP>−/−</SUP>) mice were bigger than those from wild-type mice, and the expression of SRF-dependent muscle-specific genes was upregulated. Myotube formation and myoblast differentiation were enhanced in Rfp<SUP>−/−</SUP> mice. Taken together, our findings highlight RFP as a novel regulator of muscle differentiation that acts by modulating the expression of SRF-dependent skeletal muscle-specific genes.
Kawai, Y,Osawa, T,Kobayashi, K,Inoue, R,Yamamoto, Y,Matsumoto, H,Nagao, K,Hara, T,Sakano, S,Nagamori, S,Matsuyama, H Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.14
Background: Factors predictive of survival have been identified in Western patients with metastatic clear cell renal cell carcinoma (mCCRCC) treated with sunitinib. Less is known, however, about factors predictive of survival in Japanese patients. This study evaluated factors prognostic of survival in Japanese patients with mCCRCC treated with first-line sunitinib. Materials and Methods: This retrospective study evaluated 46 consecutive Japanese mCCRCC patients treated with sunitinib as first line therapy. Clinical and biochemical markers associated with progression-free survival (PFS) were analyzed, with prognostic factors selected by uniand multivariate Cox regression analyses. Results: Univariate analysis showed that factors significantly associated with poor PFS included Memorial Sloan-Kettering Cancer Center poor risk scores, International Metastatic RCC Database Consortium poor risk and high (>0.5 mg/dl) serum C-reactive protein (CRP) concentrations (p<0.001 each). Multivariate analysis showed that high serum CRP was independently associated with poorer PFS (p=0.040). Six month disease control rate (complete response, partial response and stable disease) in response to sunitinib was significantly higher in patients with normal (${\leq}0.5mg/dl$) than elevated baseline CRP (p<0.001). Conclusions: CRP is a significant independent predictor of PFS for Japanese patients with mCCRCC treated with first-line sunitinib. Pretreatment CRP concentration may be a useful biomarker predicting response to sunitinib treatment.
H. Kawai,Y. Choi,Y. B. Kim,Y. Kubota 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Speedy operation efficiency is constantly required of the container crane operators who work for cargo handling in the port. They are experts in suppressing the sway motion which is generated in the process of the handling. This undesirable motion may deteriorate the operation efficiency due to strained nerves of the operator. Therefore, an anti-sway controller has been required on practical job-site. To accomplish an adequate anti-sway control, sensors are also required to be able to measure the position of a crane spreader moving on. In this paper, we propose a position measurement system with an image sensor. The image sensor detects two devised landmarks attached to the upside surface of a spreader to measure the displacement and height to one. The image processing technique used for the sensor is a kind of robust template matching method, named Vector Code Correlation (VCC), devised to consider the conditions of real environments. We employ the simple mechanism, so that the system can be easily applicable to existing container cranes. The details and performance of the measurement system are introduced together with the experimental results performed with the pilot system. We will also show that the system has the sufficient efficiency and accuracy for the use on practical job-site.
Subsurface Formation of Oxygen on a Ru(0001) Surface
J.H.Kim,J.H.Lee,H.Kato,N.Horimoto,M.Kawai,Y.S.Lee 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.3
The formation of subsurface oxygen on a clean and sputtered Ru(0001) surface is studied using thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). The oxygen was incorporated by exposing the surface to a partial oxygen pressure in the range of 10$^{-8}$$-$10$^{-9}$ Torr. By monitoring the signal of recombinatively desorbed molecular oxygen as a function of sample temperature, we found that oxygen molecules penetrated into the subsurface region after saturating the adsorbed layer characterized by the p(2 $\times$ 2) LEED pattern indicative of 0.25 monolayers (1 ML = 1.58 $\times$ 10$^{15}$ cm$^{-2}$). In contrast, the defects generated by Ar$^+$ sputtering on the Ru surface appear at thermally more stable sites in high-temperature O$_2$ thermal desorption states.
The Embedment of a Metadata System at Grid Farms at the Belle II Experiment
S. Ahn,J. H. Kim,T. Huh,S. Hwang,조기현,H. Jang,B. K. Kim,H. Yoon,J. Yu,Z. Drasal,T. Hara,Y. Iida,R. Itoh,G. Iwai,N. Katayama,Y. Kawai,S. Nishida,T. Sasaki,Y. Watase,T. Uglov,R. Fruhwirth 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.4
In order to search for new physics beyond the standard model, the next generation of B-factory experiment, Belle II will collect a huge data sample that is a challenge for computing systems. The Belle II experiment, which should commence data collection in 2015, expects data rates 50 times greater than that of Belle. In order to handle this amount of data, we need a new data handling system based on a new computing model, which is a distributed computing model including grid farms as opposed to the central computing model using clusters at the Belle experiment. We have constructed a metadata system and embedded the system in the grid farms of the Belle II experiment. We have tested the system using grid farms. Results show good performance in handling such a huge amount of data.
Status of JENDL High Energy File
Y. Watanabe,K. Kosako,S. Kunieda,S. Chiba,R. Fujimoto,H. Harada,M. Kawai,F. Maekawa,T. Murata,H. Nakashima,K. Niita,N. Shigyo,S. Shimakawa,N. Yamano,T. Fukahori 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The present status of the JENDL high-energy file is reported. The recent version (referred to as JENDL/HE-2007) contains neutron and proton cross section data for energies up to 3 GeV for 107 nuclides over the wide mass range from H to Am. The newly evaluated data for 41 nuclides have been added to the first version (JENDL/HE-2004) along with some revisions. The JENDL/HE-2007 includes neutron total cross sections, nucleon elastic scattering cross sections and angular distributions, nonelastic cross sections, production cross sections and double-differential cross sections of secondary light particles (n, p, d, t, ^3He, α, and π) and gamma-rays, isotope production cross sections, and fission cross sections in the ENDF-6 format. The evaluations were performed on the basis of experimental data, nuclear model calculations, and systematics based on measurements. The evaluated cross sections are compared with available experimental data and the other evaluations. Some results of benchmark tests with MCNPX codes are shown.
Kawai, M.,Zhang, J.Q.,Saito, S.,Xiao, Y.,Hatta, H. The Korean Society for Composite Materials 2009 Advanced composite materials Vol.18 No.3
Off-axis compressive deformation behavior of a unidirectional CFRP laminate at high temperature and its strain-rate dependence in a quasi-static range are examined for various fiber orientations. By comparing the off-axis compressive and tensile behaviors at an equal strain rate, the effect of different loading modes on the flow stress level, rate-dependence and nonlinearity of the off-axis inelastic deformation is elucidated. The experimental results indicate that the compressive flow stress levels for relatively larger off-axis angles of $30^{\circ}$, $45^{\circ}$ and $90^{\circ}$ are about 50 percent larger than in tension for the same fiber orientations, respectively. The nonlinear deformations under off-axis tensile and compressive loading conditions exhibit significant strain-rate dependence. Similar features are observed in the fiber-orientation dependence of the off-axis flow stress levels under tension and compression and in the off-axis flow stress differential in tension and compression, regardless of the strain rate. A phenomenological theory of viscoplasticity is then developed which can describe the tension-compression asymmetry as well as the rate dependence, nonlinearity and fiber orientation dependence of the off-axis tensile and compressive behaviors of unidirectional composites in a unified manner. It is demonstrated by comparing with experimental results that the proposed viscoplastic constitutive model can be applied with reasonable accuracy to predict the different, nonlinear and rate-dependent behaviors of the unidirectional composite under off-axis tensile and compressive loading conditions.