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Fabrication of Spinel Sensor for Fluorescence Thermometer
Daisuke Ishikawa,Toru Hagiwara,Hirotaka Kasai,Hajime Kunieda,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Spinel crystals (Cr doped MgAl2O4) with various Cr2O3 and MgO concentrations are grown using floating zone technique for fluorescence thermometer application. Temperature dependence of photoluminescence (PL) intensity is evaluated using spinel crystal and/or composite of spinel with silicone resin. PL intensity from spinel crystal and composite decreases linearly with temperature. Spenel crystal and composite are useful as sensor materials in fluorescence thermometer.
Daisuke YUKI,Hyoungseop KIM,Joo Kooi TAN,Seiji ISHIKAWA,Masanori TSUKUDA,Ichiro OMURA 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
Recently, the necessity of environmental regulation, low fuel consumption, and natural energy development is proposed by environmental issues. So the demands of power transistor devices are increased. But measurement technique of the current distribution is not keeping up with further miniaturized and integrated were needed in present condition. Now, therefore, ensuring security attended high functionalization is a subject. IGBT (Insulated Gate Bipolar Transistor) is the device that used for wide range of power devices. So we are developing imaging system used non-contact sensor arrays aimed to IGBT production line. In this paper, we propose a development of a supporting system for visual inspection IGBT device based on statistical feature and complex multi-resolution analysis. First, this performs signal de-noising after entering well-known good data and measured data. Second, the statistical feature is expressed the difference between good data and measured data are calculated. Last, classifying of good and inferiority is performed based on the result of threshold processing. In the paper, we applied our algorithm to 28 sample data including 20 good data and 8 inferiority data.
Daisuke Kudo,Naohisa Miyakoshi,Michio Hongo,Yuji Kasukawa,Yoshinori Ishikawa,Takashi Mizutani,Yoichi Mizutani,Yoichi Shimada 대한골다공증학회 2021 Osteoporosis and Sarcopenia Vol.7 No.1
Objectives: Progressive and generalized loss of skeletal muscle mass (SMM) and strength are characteristics of sarcopenia. However, the impact of appendicular and trunk SMM and back extensor strength (BES) on spinal sagittal alignment remains unclear. Herein, we investigate the relationship between these factors and spinal sagittal alignment. Methods: In total, 202 women without vertebral fractures (median age, 66.9 years; interquartile range, 61.4e71.9 years) were analyzed at an orthopedic outpatient clinic. Pelvic incidence (PI), lumbar lordosis (LL), sagittal vertical axis (SVA), and pelvic tilt (PT) were measured on whole spine radiographs. Body mass index (BMI), appendicular and trunk relative SMM index, and BES were also evaluated. These measurements were compared between spinal sagittal alignment groups using the ManneWhitney U test. Finally, the factors contributing to abnormal alignment were analyzed using multiple logistic regression analysis. Results: BES was significantly lower in all abnormal sagittal alignment groups, as defined by PI-LL ( 10), SVA (4 cm), and PT (20) (all P < 0.001). On multivariate analysis, BES was a contributing factor for abnormal PI-LL (P < 0.001), SVA (P ¼ 0.001), and PT (P < 0.001). Conversely, a decrease in appendicular and trunk relative SMM index did not statistically affect abnormal spinal sagittal alignment. Conclusions: BES was associated with changes in spinal sagittal alignment; however, SMM, which is often used for diagnosing sarcopenia, did not affect spinal sagittal alignment.
Photoluminescence Imaging of Spinel for Thermometer Application
Toru Hagiwara,Hajime Kunieda,Hirotaka Kasai,Daisuke Ishikawa,Toru Katsumata,Hiroaki Aizawa,Masayuki Shibasaki,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Photoluminescence (PL) imaging is curried out using Cr doped spinel sensors at various temperatures for 2-dimensional fluorescence thermometer application. PL images can be clearly observed using a CCD camera and UV, green and/or blue LED illuminations. Brightness of PL images from Cr doped spinel sensor decrease with temperature up to 250 oC. PL imaging is suggested to be useful for 2-dimensional fluorescence thermometer applications.
Yuji Kasukawa,Naohisa Miyakoshi,Michio Hongo,Yoshinori Ishikawa,Daisuke Kudo,Yoichi Shimada 대한척추외과학회 2015 Asian Spine Journal Vol.9 No.3
Study Design: Case-control study. Purpose: To evaluate clinical and radiological results of transforaminal lumbar interbody fusion (TLIF) performed with cortical bone trajectory (CBT) pedicle screw insertion with those of TLIF using ‘conventional’ or percutaneous pedicle screw insertion. Overview of Literature: CBT is a new trajectory for pedicle screw insertion in the lumbar spine; clinical and radiological results of TLIF using pedicle screws inserted with CBT are unclear. Methods: In total, 26 patients (11 males, 15 females) were enrolled in this retrospective study and divided into three groups: TLIF with pedicle screw insertion by conventional minimally invasive methods via the Wiltse approach (M-TLIF, n=10), TLIF with percutaneous pedicle screw insertion (P-TLIF, n=6), and TLIF with pedicle screw insertion with CBT (CBT-TLIF, n=10). Surgical results and preand postoperative radiological findings were evaluated and compared. Results: Intraoperative blood loss was significantly less with CBT-TLIF (p =0.03) than with M-TLIF. Postoperative lordotic angles did not differ significantly among the three groups. Complete fusions were obtained in 10 of 12 levels (83%) with M-TLIF, in seven levels (100%) with P-TLIF, and in 10 of 11 levels (91%) with CBT-TLIF. On postoperative computed tomography, correct positioning was seen in 84.1% of M-TLIF screws, 88.5% of P-TLIF screws, and 90% of CBT-TLIF screws. Conclusions: CBT-TLIF resulted in less blood loss and a shorter operative duration than M-TLIF or P-TLIF. Postoperative rates of bone union, maintenance of lordotic angles, and accuracy of pedicle screw positions were similar among the three groups.
Photoluminescence Imaging of Luminous Paint for Surface Temperature Monitoring
Hirotaka Kasai,Yoshihiro Kameyama,Toru Hagiwara,Daisuke Ishikawa,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Temperature monitoring is essentially important for stable control of fabrication processes. In order to develop a convenient 2-dimensional temperature monitoring system using a thermo-paint, photoluminescence (PL) images are observed from the luminous paints at various temperatures. Commercially available and in-house modified luminous paints are evaluated for improving temperature sensitivity and stability of the thermo-paints. Temperature dependences of PL images from various luminous paints are reported for developing temperature monitoring procedure using a thermo-paint.
Yuji Kasukawa,Naohisa Miyakoshi,Michio Hongo,Yoshinori Ishikawa,Daisuke Kudo,Ryota Kimura,Yuichi Ono,Jumpei Iida,Chiaki Sato,Yoichi Shimada 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.5
Study Design: Retrospective and comparative study. Purpose: We assessed surgical treatment outcomes in patients with thoracic myelopathy due to ossification of the ligamentum flavum (OLF), and OLF combined with ossification of the posterior longitudinal ligament (OPLL) or vertebral fracture (VF) at the same level. Overview of Literature: OLF and OPLL cause severe thoracic myelopathy. Osteoporotic VF commonly occurs at the thoracolumbar junction. There have been no investigations of thoracic myelopathy due to OLF and VF. Methods: Forty patients were divided among three groups: the OLF group (n=23): myelopathy due to OLF, the OLF+OPLL group (n=12): myelopathy due to OLF and OPLL, and the OLF+VF group (n=5): myelopathy due to OLF and VF. We recorded OLF, OPLL, and VF sites and operative procedures. Each patient’s neurological status, according to the Japanese Orthopaedic Association (JOA) score, and walking ability were evaluated pre- and postoperatively. Results: Patients in the OLF+OPLL group were significantly younger than those in the other two groups. The preoperative JOA score was significantly lower in the OLF+VF than OLF group. The final JOA score was significantly lower in the OLF+VF than OLF and OLF+OPLL groups. The JOA score recovery rate was significantly lower in the OLF+VF than OLF group. Final walking ability was significantly worse in the OLF+OPLL and OLF+VF groups than in the OLF group and significantly worse in the OLF+VF than OLF+OPLL group. Conclusions: Thoracic myelopathy due to OLF+VF occurs primarily in older females, who also exhibit worse preoperative and postoperative neurological status, and worse walking ability, than patients with thoracic myelopathy due to OLF or OLF+OPLL.