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Monitoring of tool wear for high precision blanking using AE technique
SHIMIZU, Tomoharu,NISHI, Junichiro,IWABUCHI, Akira ENGINEERING TRIBOLOGY RESEARCH INSTITUTE KYUNGPOOK 1999 INTERNATIONAL SYMPOSIUM ON HIGH PERFORMANCE OF TRI Vol.1999 No.-
It is important to estimate progress of the tool wear of press working, because the tool wear cause low precision products. So, the aim of this research is establishment in a monitoring technique of press tool wear. Acoustic emission (AE) were measured during high precision blanking. An auto-regressive (AR) model analysis were conducted for the AE signals. Then, AR parameters obtained were analyzed with principal component analysis, which is one of multivarate analysis method. The correlations between the change in AR parameters and the degree of the progress of the tool wear were examined. The possibility of monitoring of the tool wear for the press working was indicated.
Toru Shigemitsu,Junichiro Fukutomi,Hiroki Shimizu 한국유체기계학회 2012 International journal of fluid machinery and syste Vol.5 No.4
Small-sized axial fans are used as air coolers for electric equipment. There is a strong demand for higher power of fans according to the increase of quantity of heat from electric devices. Therefore, higher rotational speed design is conducted, although, it causes the deterioration of the efficiency and the increase of noise. Then, the adoption of contra-rotating rotors for small-sized fans is proposed for the improvement of the performance. In the case of contra-rotating rotors, blade row distance between the front and the rear rotors influences on the performance and the noise. Therefore, it is important to clarify the optimum blade row distance between front and rear rotors. The performance curves of the contra-rotating small-sized axial fan under the condition of different blade row distances are shown and the blade row interaction between the front and the rear rotors are discussed by the numerical results. Furthermore, the optimum blade row distance of the contra-rotating small-sized axial fan is considered.
Shigemitsu, Toru,Fukutomi, Junichiro,Shimizu, Hiroki Korean Society for Fluid machinery 2012 International journal of fluid machinery and syste Vol.5 No.4
Small-sized axial fans are used as air coolers for electric equipment. There is a strong demand for higher power of fans according to the increase of quantity of heat from electric devices. Therefore, higher rotational speed design is conducted, although, it causes the deterioration of the efficiency and the increase of noise. Then, the adoption of contra-rotating rotors for small-sized fans is proposed for the improvement of the performance. In the case of contra-rotating rotors, blade row distance between the front and the rear rotors influences on the performance and the noise. Therefore, it is important to clarify the optimum blade row distance between front and rear rotors. The performance curves of the contra-rotating small-sized axial fan under the condition of different blade row distances are shown and the blade row interaction between the front and the rear rotors are discussed by the numerical results. Furthermore, the optimum blade row distance of the contra-rotating small-sized axial fan is considered.
Novel mutations of CDKN1C in Japanese patients with Beckwith-Wiedemann syndrome
Hitomi Yatsuki,Ken Higashimoto,Kosuke Jozaki,Kayoko Koide,Junichiro Okada,Yoriko Watanabe,Nobuhiko Okamoto,Yoshinobu Tsuno,Yoko Yoshida,Kazutoshi Ueda,Kenji Shimizu,Hirofumi Ohashi,Tsunehiro Mukai,Hid 한국유전학회 2013 Genes & Genomics Vol.35 No.2
Beckwith-Wiedemann syndrome (BWS) is an imprinting-related human disease that is characterized by macrosomia, macroglossia, abdominal wall defects, and variable minor features. BWS is caused by several genetic/epigenetic alterations, such as loss of methylation at KvDMR1,gain of methylation at H19-DMR, paternal uniparental disomy of chromosome 11, CDKN1C mutations, and structural abnormalities of chromosome 11. CDKN1C is an imprinted gene with maternal preferential expression, encoding for a cyclin-dependent kinase (CDK) inhibitor. Mutations in CDKN1C are found in 40 % of familial BWS cases with dominant maternal transmission and in *5 % of sporadic cases. In this study, we searched for CDKN1C mutations in 37BWS cases that had no evidence for other alterations. We found five mutations—four novel and one known—from a total of six patients. Four were maternally inherited and one was a de novo mutation. Two frame-shift mutations and one nonsense mutation abolished the QT domain, containing a PCNA-binding domain and a nuclear localization signal. Two missense mutations occurred in the CDK inhibitory domain,diminishing its inhibitory function. The above-mentioned mutations were predicted by in silico analysis to lead to loss of function; therefore, we strongly suspect that such anomalies are causative in the etiology of BWS.
Miori Kishimoto,Sa-Hun Pae,Naoyoshi Muroya,Hirokazu Watarai,Hiroshi Anzai,이기자,Junichiro Shimizu,Motoki Sasaki,Kazutaka Yamada 대한수의학회 2010 Journal of Veterinary Science Vol.11 No.1
Caudolateral curvilinear osteophyte (CCO), an osteophyte at the site of joint capsule attachment on the caudal aspect of the femoral neck, has been advocated as a radiographic criterion for coxofemoral subluxation. The correlation between the presence of CCO on radiographs (radiographic- CCO), the size of the CCO (CCO index) on three-dimensional computed tomographic (CT) images, and hip evaluation using transverse CT images was assessed in 22 Border Collies. CCOs were detected on the radiographs and CT images of 32% and 100% femurs, respectively. The CCO index correlated significantly with radiographic-CCO, but a large CCO index did not necessarily imply that the CCO was visible on radiographs. Hence, radiographic-CCO findings should be used cautiously in hip evaluation of Border Collies.