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Studies of charmed strange baryons in theΛDfinal state at Belle
Kato, Y.,Iijima, T.,Adachi, I.,Aihara, H.,Asner, D. M.,Aulchenko, V.,Ayad, R.,Badhrees, I.,Bakich, A. M.,Barberio, E.,Behera, P.,Bhardwaj, V.,Bhuyan, B.,Biswal, J.,Bobrov, A.,Bondar, A.,Bonvicini, G. American Physical Society 2016 Physical Review D Vol.94 No.3
<P>We report the discovery of Xi(c)(3055)(0), observed by its decay into the final-state Lambda D-0, and present the first observation and evidence of the decays of Xi(c)(3055)(+) and Xi(c)(3080)(+) into Lambda D+. We also perform a combined analysis of the Lambda D+ with the Sigma K-++(c)- and Sigma(c)*K-++(-) decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Xi(c)(3055)(+) -> Lambda D+)/B(Xi(c)(3055)(+) -> Sigma(++)(c) K-) = 5.09 +/- 1.01 +/- 0.76, B(Xi(c)(3080)(+) -> Lambda D+)/B(Xi(c)(3080)(+) -> Sigma K-++(c)-) = 1.29 +/- 0.30 +/- 0.15, and B(Xi(c)(3080)(+) -> Sigma(c)*K-++(-))/B(Xi(c)(3080)(+) -> Sigma K-++(c)-) = 1.07 +/- 0.27 +/- 0.04, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.</P>
Position Calibration Method for Large size Industrial Robots Based on Random Forest
D. Kato,N. Maeda,T. Hirogaki,E. Aoyama,K. Takahashi 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
Most industrial robots are unsuitable for variable production systems because they are taught using the teaching playback method. In contrast, the offline teaching method has been developed, but it has not progressed because of the low positioning accuracy. Therefore, several studies have proposed methods to calibrate for positioning errors using neural networks. However, it is difficult to identify the factors of positioning errors because the structure of neural networks is not clear. Herein, we applied the random forest method, which is a type of machine learning method, and constructed a prediction model for positioning errors. A large industrial robot was used, and three-dimensional coordinates of the end-effector were obtained using a laser tracker. The model to predict the positioning error from end-effector coordinates, joint angles, and joint torques was constructed using the random forest method, and the positioning error was predicted with high accuracy. The random forest analysis demonstrated that joint 2 was the primary factor of the X- and Z-axis errors. This suggested that the air cylinder used as an auxiliary to the servo motor of joint 2 was the error factor. The positioning error norm was reduced at all points using the proposed calibration.
Search for doubly charmed baryons and study of charmed strange baryons at Belle
Kato, Y.,Iijima, T.,Adachi, I.,Aihara, H.,Asner, D. M.,Aushev, T.,Bakich, A. M.,Bala, A.,Ban, Y.,Bhardwaj, V.,Bhuyan, B.,Bobrov, A.,Bonvicini, G.,Bozek, A.,Brad,ko, M.,Browder, T. E.,Č,erven American Physical Society 2014 PHYSICAL REVIEW D - Vol.89 No.5
Measurements of the absolute branching fractions of B+→Xcc¯K+ and B+→D¯(*)0π+ at Belle
Kato, Y.,Iijima, T.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Barberio, E.,Behera, P.,Bhardwaj, V.,Bhuyan, B.,Bisw American Physical Society 2018 Physical Review D Vol.97 No.1
<P>We present the measurement of the absolute branching fractions of B+ -> Xc (c) over barK+ and B+ -> (D) over bar ((*)0)pi(+) decays, using a data sample of 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Here, X-c (c) over bar denotes eta(c), J/psi, chi(c0), chi(c1), eta(c) (2S), psi(2S), psi(3770), X(3872), and X(3915). We do not observe significant signals for X(3872) or X(3915) and set the 90% confidence level upper limits at B(B+ -> X(3872)K+) < 2.6 x 10(-4) and B(B+ -> X(3915)K+) < 2.8 x 10(-4). These represent the most stringent upper limit for B(B+ -> X(3872)K+) to date and the first limit for B(B+ -> X(3915)K+). The measured branching fractions for eta(c) and eta(c)(2S) are the most precise to date, B(B+ -> eta K-c(+)) = (12.0 +/- 0.8 +/- 0.7) x 10(-4) and B(B+ -> eta(c)(2S)K+) = (4.8 +/- 1.1 +/- 0.3) x 10(-4), where the first and second uncertainties are statistical and systematic, respectively.</P>
최진형(J.H. Choi),이재민(J.M. Lee),도덕희(D.H. Doh),조효제(H.J. Jo),Kiyomi Suzuki,Shinji Kato 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Characteristics between the loads and the three-dimensional flow behaviors of a fish-shape power generating system have been investigated. The constructed system have been tested under the current speed 1.5knot. The flow features of three fish models (horse mackerel, mackerel, perch) has been tested. The width of the blade installed around the body is 50㎜. The flows around the models have been investigated by using 3D-PTV. Further, the load test has been carried out at the same flow conditions. Among the models it has been verified that the S65 is most appropriate for power generations.
Suzuki, Y.,Hong, Y.H.,Song, S.H.,Ardiyanti, A.,Kato, D.,So, K.H.,Katoh, K.,Roh, Sang-Gun Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.9
Adipokines, adipocyte-derived protein, have important roles in various kinds of physiology including energy homeostasis. Chemerin, one of adipocyte-derived adipokines, is highly expressed in differentiated adipocytes and is known to induce macrophage chemotaxis and glucose intolerance. The objective of the present study was to investigate the changes of chemerin and the chemokine-like-receptor 1 (CMKLR1) gene expression levels during differentiation of the bovine adipocyte and in differentiated adipocytes treated with tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), adiponectin, leptin, and chemerin (peptide analog). The expression levels of the chemerin gene increased at d 6 and 12 of the differentiation period accompanied by increased cytoplasm lipid droplets. From d 6 onward, peroxisome proliferator-activated receptor-${\gamma}2$ (PPAR-${\gamma}2$) gene expression levels were significantly higher than that of d 0 and 3. In contrast, CMKLR1 expression levels decreased at the end of the differentiation period. In fully differentiated adipocytes (i.e. at d 12), the treatment of TNF-${\alpha}$ and adiponectin upregulated both chemerin and CMKLR1 gene expression levels, although leptin did not show such effects. Moreover, chemerin analog treatment was shown to upregulate chemerin gene expression levels regardless of doses. These results suggest that the expression of chemerin in bovine adipocyte might be regulated by chemerin itself and other adipokines, which indicates its possible role in modulating the adipokine secretions in adipose tissues.