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High-frequency Induction Heating for Tiny Foreign Metals
Shinya Kurachi,Naoki Yamamoto,Hiroaki Yamada,Toshihiko Tanaka,Eiji Hiraki,Yukiharu Yamada,Tatsuya Nagao,Yasuhiro Miyake,Yujiro Noda 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
The anxiety of tiny metal contamination into resin materials in the manufacturing process has become one of the serious issues. Because it may often cause of overheat in lithium-ion batteries, flat panel displays, and so on. Therefore, a study on detecting method of the tiny metals is a significant issue. The authors have been investigating the high-frequency induction heating (IH) based approach for tiny metals detection. In this paper, effective magnetic circuit design and IH conditions are discussed and demonstrated from theoretical and experimental point of view.
( Man-il Kim ),( Namgyun Kim ),( Seungyoub Yi ),( Hiroaki Noda ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Geological characteristics of Ulleung Island include lands covered with eruptive rocks caused by multiple volcanic activities, deep layers of colluvium, and residual soils from weathering and erosion. Given this, such areas near mountains are vulnerable to localized heavy rain and typhoons, particularly in the summer season, along with the increasing frequency of soil erosion, falling rocks, and landslides every year. Accordingly, debris flow has a high chance of occurrence in mountain streams as slope failure and landslides frequently occur in the thawing season in February, the summer season from June to September, and November. In addition, the seasons when ground disasters occur at mountain areas frequently are normally the busiest months of Ulleung Island wherein the number of tourists increases from March, which is the beginning of the thawing season, and decreases from November. Thus, sufficient preparation for ground disasters is crucial. We, therefore, conducted this study on account of the landslide and debris flow incidents in Ulleung Island during the summer of 2016. In this study, we assess the functions of protection facilities that have been installed to mitigate debris flow hazard through simulation analyses, identifying the characteristics of ground disasters at mountain areas in the island and suggesting the types of damage caused.
Yoshihide Kanno,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Keisuke Yonamine,Kazuaki Miyamoto,Toji Murabayashi,Fumisato Kozakai,Jun Horaguchi,Yutaka Noda,Kei Ito 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.6
Background/Aims: The aim of this study was to evaluate outcomes of inside plastic stents (iPSs) versus those of metal stents (MSs) for treating unresectable perihilar malignant obstructions. Methods: For all patients who underwent endoscopic suprapapillary placement of iPS(s) or MS(s) as the first permanent biliary drainage for unresectable malignant perihilar obstructions between January 2014 and August 2019, clinical outcomes using iPSs (n=20) and MSs (n=85), including clinical efficacy, adverse events, and time to recurrence of biliary obstruction (RBO), were retrospectively evaluated. Results: There were no differences in clinical effectiveness (95% for the iPS group vs. 92% for the MS group, p=1.00). Procedure-related adverse events, including pancreatitis, acute cholangitis, acute cholecystitis, and death, were observed for 8% of the MS group, although no patient in the iPS group developed such adverse events. The median time to RBO was 561 days (95% confidence interval, 0–1,186 days) for iPSs and 209 days (127–291 days) for MSs, showing a significant difference (p=0.008). Conclusions: Time to RBO after iPS placement was significantly longer than that after MS placement. IPSs, which are removable, unlike MSs, were an acceptable option.
Effect of Low Level of Starch Acetylation on Physicochemical Properties of Potato Starch
Hetti Arachchige Mangalika Wic,Kazuo Yamamoto,Hiroaki Yamauchi,Takahiro Noda 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.1
In order to find out the effect of low level of starch acetylation on physicochemical properties of potato starch, amylose content, digestibility of raw and gelatinized starch, thermal properties, pasting properties, and the swelling power of native and acetylated potato starches were measured. The amylose content was significantly lower in acetylated starch than in their counterpart native starches. Though a tendency in the decrease in digestibility of raw starch was observed with starch acetylation, acetylation did not alter the proportion of readily digestible starch (RDS), slowly digestible starch (SDS), and resistant starch (RS) of both raw and gelatinized potato starches. No clear increase in the swelling power was observed, however, the peak and onset gelatinization temperatures and the enthalpy required for starch gelatinization decreased with starch acetylation. Peak and breakdown viscosities were reduced due to acetylation of potato starch while final viscosity and set back were increased.
Sho Hasegawa,Shinsuke Koshita,Yoshihide Kanno,Takahisa Ogawa,Toshitaka Sakai,Hiroaki Kusunose,Kensuke Kubota,Atsushi Nakajima,Yutaka Noda,Kei Ito 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.6
Background/Aims: The use of endoscopic intervention (EI) for acute biliary pancreatitis (ABP) remains controversial because theseverity of biliary obstruction/cholangitis/pancreatitis is not reflected in the indications for early EI (EEI). Methods: A total of 148 patients with ABP were included to investigate 1) the differences in the rate of worsening cholangitis/pancreatitis between the EEI group and the early conservative management (ECM) group, especially for each severity of cholangitis/pancreatitis, and 2) the diagnostic ability of imaging studies, including endoscopic ultrasound (EUS), to detect common bile ductstones (CBDSs) in the ECM group. Results: No differences were observed in the rate of worsening cholangitis between the EEI and ECM groups, regardless of theseverity of cholangitis and/or the existence of impacted CBDSs. Among patients without impacted CBDSs and moderate/severecholangitis, worsening pancreatitis was significantly more frequent in the EEI group (18% vs. 4%, p=0.048). In patients in the ECMgroup, the sensitivity and specificity for detecting CBDSs were 73% and 98%, respectively, for EUS, whereas the values were 13% and92%, respectively, for magnetic resonance cholangiopancreatography. Conclusions: EEI should be avoided in the absence of moderate/severe cholangitis and/or impacted CBDSs because of the high rateof worsening pancreatitis. EUS can contribute to the accurate detection of residual CBDSs, for the determination of the need forelective EI.
Yoshihide Kanno,Kei Ito,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Toji Murabayashi,Sho Hasegawa,Fumisato Kozakai,Yujiro Kawakami,Yuki Fujii,Yutaka Noda 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.3
Background/Aims: Although both radial- and convex-arrayed endoscopic ultrasonography (EUS) scopes are widely used forobservational EUS examinations, there have been few comparative studies on their power of visualization. The aim of this study was toevaluate the capability of these EUS scopes for observation of the pancreatobiliary junction. Methods: The rate of successful visualization of the pancreatobiliary junction was retrospectively compared between a radial-arrayedand a convex-arrayed echoendoscope, from a prospectively maintained database. Study periods were defined as January 2010 toDecember 2012 for the radial group, and February 2015 to October 2016 for the convex group because the respective scope wasmainly used during those periods. Results: During the study period, 1,660 cases with radial EUS and 1,984 cases with convex EUS were recruited. The success rates ofobservation of the pancreatobiliary junction were 80.0% and 89.5%, respectively (p<0.0001). Conclusions: The capability of visualization of the pancreatobiliary junction in observational EUS was found to be better with aconvex-arrayed than with a radial-arrayed echoendoscope
Yuki Fujii,Yoshihide Kanno,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Keisuke Yonamine,Yujiro Kawakami,Toji Murabayashi,Fumisato Kozakai,Yutaka Noda,Hiroyuki Okada,Kei 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.2
Background/Aims: This study aimed to identify the predictive factors for inaccurate endoscopic ultrasound-guided fine needleaspiration (EUS-FNA) diagnosis of swollen lymph nodes without rapid on-site cytopathological evaluation. Methods: Eighty-three consecutive patients who underwent EUS-FNA for abdominal or mediastinal lymph nodes from January2008 to June 2017 were included from a prospectively maintained EUS-FNA database and retrospectively reviewed. The sensitivity,specificity, and accuracy of EUS-FNA for the detection of neoplastic diseases were calculated. Candidate factors for inaccurate diagnosis(lymph node size and location, needle type, puncture route, number of passes, and causative disease) were evaluated by comparisonbetween accurately diagnosed cases and others. Results: The final diagnosis of the punctured lymph node was classified as neoplastic (65 cases: a metastatic lymph node, malignantlymphoma, or Crow-Fukase syndrome) or non-neoplastic (18 cases: a reactive node or amyloidosis). The sensitivity, specificity, andaccuracy were 83%, 94%, and 86%, respectively. On multivariate analyses, small size of the lymph node was the sole predictive factor forinaccurate EUS-FNA diagnosis with a significant difference (odds ratios, 19.8; 95% confidence intervals, 3.15–124; p=0.0015). Conclusions: The lymph node size of <16 mm was the only independent factor associated with inaccurate EUS-FNA diagnosis ofswollen lymph nodes.
Hiroshi Kawada,Masayuki Kanematsu,Satoshi Goshima,Hiroshi Kondo,Haruo Watanabe,Yoshifumi Noda,Yukichi Tanahashi,Nobuyuki Kawai,Hiroaki Hoshi 대한영상의학회 2015 Korean Journal of Radiology Vol.16 No.2
To evaluate the multiphase contrast-enhanced magnetic resonance (MR) imaging features of Bacillus Calmette-Guérin (BCG)-induced granulomatous prostatitis (GP). Magnetic resonance images obtained from five patients with histopathologically proven BCGinduced GP were retrospectively analyzed for tumor location, size, signal intensity on T2-weighted images (T2WI) and diffusion-weighted images (DWI), apparent diffusion coefficient (ADC) value, and appearance on gadolinium-enhanced multiphase images. MR imaging findings were compared with histopathological findings. Bacillus Calmette-Guérin-induced GP (size range, 9–40 mm; mean, 21.2 mm) were identified in the peripheral zone in all patients. The T2WI showed lower signal intensity compared with the normal peripheral zone. The DWIs demonstrated high signal intensity and low ADC values (range, 0.44–0.68 x 10-3 mm2/sec; mean, 0.56 x 10-3 mm2/sec), which corresponded to GP. Gadolinium-enhanced multiphase MR imaging performed in five patients showed early and prolonged ring enhancement in all cases of GP. Granulomatous tissues with central caseation necrosis were identified histologically, which corresponded to ring enhancement and a central low intensity area on gadolinium-enhanced MR imaging. The findings on T2WI, DWI, and gadolinium-enhanced images became gradually obscured with time. Bacillus Calmette-Guérin-induced GP demonstrates early and prolonged ring enhancement on gadoliniumenhanced MR imaging which might be a key finding to differentiate it from prostate cancer.