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Takao, Hidekuni,Matsumoto, Yoshinori,Seo, Heedon,Ishida, Makaoto,Nakamura, Tetsuro 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
A novel piezoresistive silicon accelerometer using SOI (Silicon On Insulator) structure is described. The accelerometer has high temperature resistance realized by perfect isolation of piezoresistors. Furthermore, the accelerometer can detect three dimensional acceleration vector with a new principal using simple analog operational circuits. FEM (Finite Element Modeling) analysis were carried out with a commercial package, ANSYS for design of the device structure and estimation of the device characteristics. Temperature characteristics and output characteristics of fabricated devices were measured, and compared with the simulated results. As the result of comparison, good agreement was obtained.
Research and Development of the Triple Effect Absorption Chiller-Heater Technology in Japan
Kashiwagi, Takao,Akisawa, Atsushi,Hamamoto, Yoshinori The Society of Air-Conditioning and Refrigerating 2004 설비저널 Vol.33 No.3
This article reviews R&D of triple effect cycle developed in Japan. Most of the refrigeration and heat pump technologies are dominated by vapor compressor system. The vapor compressor system, however, is highly concerned with the environmental regulations , as most of the vapor compressor technologies are using CFCs or HCFCs which are known as ozone depleting and global warming gases. As a consequence, refrigeration technologists are trying to invent or to develop an alternative to vapor compressor refrigeration devices. Thermally driven, absorption technology is one of the possible alternatives. At the moment, absorption cycle is most promising technology The paper summarizes briefly the current research and development in advanced technologies of triple effect absorption chiller-heater in Japan.(omitted)
Hiroya Sakaguchi,Toshitatsu Takao,Yoshitaka Takegawa,Yuki Koga,Kazunori Yamanaka,Masataka Sagata,Shinwa Tanaka,Yoshinori Morita,Takashi Toyonaga,Yuzo Kodama 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.1
Background/Aims: Application of polyglycolic acid (PGA) sheets using fibrin glue in post-endoscopic submucosal dissection (ESD)ulcers to prevent bleeding has been reported to be difficult with the conventional delivery method because of gravity. This studyassessed the usefulness of the envelope-based delivery system with and against gravity in living pigs. Methods: PGA sheets were applied on post-ESD ulcers with and against gravity six times each using the conventional and envelopemethods, respectively. The PGA sheet delivery time and the endoscopic and histological findings of the treated ulcer floors werecompared. Results: With gravity, the median PGA sheet application time was 1.00 (0.68–1.30) min/cm2 and 0.32 (0.18–0.52) min/cm2 with theconventional and envelope techniques (p=0.002), respectively, and against gravity, it was 1.20 (1.13–1.63) min/cm2 and 0.50 (0.39–0.58) min/cm2 (p=0.002), respectively. Against gravity, the endoscopic and histological findings revealed that the conventional grouphad insufficient fixation of the PGA sheets, but the envelope groups had sufficient fixation. The results with gravity were similarbetween the groups. Conclusions: The envelope method makes it possible to deliver PGA sheets to the stomach quickly and cover ulcers appropriatelyboth with and against gravity in living pigs.
Yoshiko Nakano,Toshitatsu Takao,Yoshinori Morita,Shinwa Tanaka,Takashi Toyonaga,Eiji Umegaki,Yuzo Kodama 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.5
Background/Aims: Mucosal cutting biopsy (MCB) is useful for the histopathological diagnosis of gastric subepithelial tumors (SETs). However, there is little information on cases in which MCB did not establish a diagnosis. In the current study, we aimed to investigatethe characteristics of cases in which MCB was unsuccessful. Methods: Cases in which MCB was used to histopathologically diagnose gastric SETs at Kobe University Hospital between August 2012and October 2018 were retrospectively reviewed. Results: Forty-five cases in which MCB was used to diagnose 43 gastric SETs in 43 patients were analyzed. The median tumor sizewas 20 mm (range, 8–50 mm). Pathological examinations resulted in definitive and suspected diagnoses and no diagnosis in 29(gastrointestinal stromal tumor: n=17, leiomyoma: n=7, aberrant pancreas: n=3, others: n=2), 6, and 10 cases, respectively. Failure toexpose the tumor according to retrospective examinations of endoscopic images was significantly associated with no diagnosis. Otherpossible explanations included a less elevated tumor, biopsy of the surrounding field instead of the tumor due to the mobility, and poorendoscope maneuverability due to the tumor being close to the cardia. Conclusions: Clear exposure of gastric SETs during MCB may improve the diagnostic rate of such examinations.
Kei Matsumoto,Shinwa Tanaka,Takashi Toyonaga,Nobuaki Ikezawa,Mari Nishio,Masanao Uraoka,Tomoatsu Yoshihara,Hiroya Sakaguchi,Hirofumi Abe,Tetsuya Yoshizaki,Madoka Takao,Toshitatsu Takao,Yoshinori Morit 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.1
Background/Aims: The anastomotic site after distal gastrectomy is the area most affected by duodenogastric reflux. Differentreconstruction methods may affect the lesion characteristics and treatment outcomes of remnant gastric cancers at the anastomoticsite. We retrospectively investigated the clinicopathologic and endoscopic submucosal dissection outcomes of remnant gastriccancers at the anastomotic site. Methods: We recruited 34 consecutive patients who underwent endoscopic submucosal dissection for remnant gastric cancer at theanastomotic site after distal gastrectomy. Clinicopathology and treatment outcomes were compared between the Billroth II and non-Billroth II groups. Results: The tumor size in the Billroth II group was significantly larger than that in the non-Billroth II group (22 vs. 19 mm;p=0.048). More severe gastritis was detected endoscopically in the Billroth II group (2 vs. 1.33; p=0.0075). Moreover, operation timewas longer (238 vs. 121 min; p=0.004) and the frequency of bleeding episodes was higher (7.5 vs. 3.1; p=0.014) in the Billroth IIgroup. Conclusions: Compared to remnant gastric cancers in non-Billroth II patients, those in the Billroth II group had larger lesions with abackground of severe remnant gastritis. Endoscopic submucosal dissection for remnant gastric cancers in Billroth II patients involvedlonger operative times and more frequent bleeding episodes than that in patients without Billroth II.