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Kato, Yoshihito,Tada, Yutaka,Urano, Kunihiko,Hattori, Masahiro,Nagatsu, Yuichiro,Koh, Song-Tae,Lee, Young-Sei 社団法人 化学工学会 2010 化學工學論文集 Vol.36 No.1
<P>Numerous studies on power consumption in mixing vessels have been reported, and several power correlations have been developed for non-baffled mixing vessels, for example, Nagata's correlations. However, baffled mixing vessels with different impeller geometries have different power numbers. In this paper, the effects of vessel bottom shape, number of blades, and impeller position on power number were measured for several impellers with geometries that had been assumed to have the same power in Nagata's concept. It was found that power numbers in baffled vessels varied greatly with impeller geometry, while Nagata's concept is valid for non-baffled vessels, regardless of impeller position.</P>
History and Future of Treatment for Acute Stage Kawasaki Disease
Masahiro Ishii,Takasuke Ebato,Hirihisa Kato 대한심장학회 2020 Korean Circulation Journal Vol.50 No.2
Kawasaki disease is a form of vasculitis, mainly in small and medium arteries of unknown origin, occurring frequently in childhood. It is the leading form of childhood-onset acquired heart disease in developed countries and leads to complications of coronary artery aneurysms in approximately 25% of cases if left untreated. Although more than half a century has passed since Professor Tomisaku Kawasaki's first report in 1957, the cause is not yet clear. Currently, intravenous immunoglobulin therapy has been established as the standard treatment for Kawasaki disease. Various treatment strategies are still being studied under the slogan, “Ending powerful inflammation in the acute phase as early as possible and minimizing the incidence of coronary artery lesions,” as the goal of acute phase treatments for Kawasaki disease. Currently, in addition to immunoglobulin therapy, steroid therapy, therapy using infliximab, biological products, suppression of elastase secretion inside and outside the neutrophils, inactivated ulinastatin therapy and cyclosporine therapy, plasma exchange, etc. are performed. This chapter outlines the history and transition of the acute phase treatment for Kawasaki disease.
Seiya Oga,Masahiro Hachisuga,Nobuhiro Hidaka,Yasuyuki Fujita,Hiroshi Tomonobe,Hidetaka Yamamoto,Kiyoko Kato 대한산부인과학회 2019 Obstetrics & Gynecology Science Vol.62 No.5
Gastric cancer involving the placenta during pregnancy is rare; however, we present 1 such case in this report. A31-year-old Japanese woman was referred at 26 weeks of gestation for the evaluation of a swollen left supraclavicularlymph node. Biopsy revealed poorly differentiated adenocarcinoma, and esophagogastroduodenoscopy with biopsyof the stomach confirmed the diagnosis of gastric cancer. Her epigastric and back pain became more pronouncedand her general status worsened, and we performed a cesarean delivery at 29 weeks. Microscopic examination ofthe placental specimen revealed poorly differentiated adenocarcinoma cells diffused into the intervillous space. Postpartum chemotherapy consisted of S-1 plus oxaliplatin. Unfortunately, this treatment was ineffective, and thepatient died 3 months after delivery. The infant did well, without clinical or laboratory manifestations of metastasis. In patients with advanced gastric cancer during pregnancy, it is important to perform a microscopic examination ofthe placenta to evaluate for metastatic involvement.
Hirotaka Hasegawa,Masahiro Shin,Jun Kawagishi,Hidefumi Jokura,Toshinori Hasegawa,Takenori Kato,Mariko Kawashima,Yuki Shinya,Hiroyuki Kenai,Takuya Kawabe,Manabu Sato,Toru Serizawa,Osamu Nagano,Kyoko Ao 대한뇌졸중학회 2022 Journal of stroke Vol.24 No.2
Background and Purpose To assess the long-term outcomes of intracranial dural arteriovenous fistula (DAVF) treated with stereotactic radiosurgery (SRS) alone or embolization and SRS (Emb- SRS) and to develop a grading system for predicting DAVF obliteration. Methods This multi-institutional retrospective study included 200 patients with DAVF treated with SRS or Emb-SRS. We investigated the long-term obliteration rate and obliteration-associated factors. We developed a new grading system to estimate the obliteration rate. Additionally, we compared the outcomes of SRS and Emb-SRS by using propensity score matching. Results The 3- and 4-year obliteration rates were 66.3% and 78.8%, respectively. The post-SRS hemorrhage rate was 2%. In the matched cohort, the SRS and Emb-SRS groups did not differ in the rates of obliteration (P=0.54) or post-SRS hemorrhage (P=0.50). In multivariable analysis, DAVF location and cortical venous reflux (CVR) were independently associated with obliteration. The new grading system assigned 2, 1, and 0 points to DAVFs in the anterior skull base or middle fossa, DAVFs with CVR or DAVFs in the superior sagittal sinus or tentorium, and DAVFs without these factors, respectively. Using the total points, patients were stratified into the highest (0 points), intermediate (1 point), or lowest (≥2 points) obliteration rate groups that exhibited 4-year obliteration rates of 94.4%, 71.3%, and 60.4%, respectively (P<0.01). Conclusions SRS-based therapy achieved DAVF obliteration in more than three-quarters of the patients at 4 years of age. Our grading system can stratify the obliteration rate and may guide physicians in treatment selection.
HUMAN INTERFACE TO MULTIMEDIA DATABASE SYSTEMS
( Kazuhide Higuchi ),( Masahiro Tada ),( Akihiro Ogino ),( Ayumi Sato ),( Emi Yano ),( Hayato Kobayashi ),( Toshikazu Kato ) 한국감성과학회 2002 춘계학술대회 Vol.2002 No.-
To transmit users`` intentions that vary with each person, intuitive and bi-directional interactions between users and a computer are necessary. We considered these interactions by dividing them into two spaces, physical space and informational space. Informational space supports human thinking process by arranging and visualizing much information. Physical space reproduces the real world where various restrictions exist to virtual space. From the viewpoint of three aspects - contents model, kansei model and context model - we defmed the style of the interaction between user and multimedia database. In this paper, for the purpose of examining the way to realize the interaction based on these models, we developed interior design coordination support system and garden coordination system, and then evaluated them.
Yamamoto Tomohiko,Kato Atsushi,Hayakawa Masato,Shimoyama Kazuhito,Ara Kuniaki,Hatakeyama Nozomu,Yamauchi Kanau,Eda Yuhei,Yui Masahiro 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.3
In a secondary cooling system of a sodium-cooled fast reactor (SFR), rapid detection of hydrogen due to sodiumwater reaction (SWR) caused by water leakage from a heat exchanger tube of a steam generator (SG) is important in terms of safety and property protection of the SFR. For hydrogen detection, the hydrogen detectors using atomic transmission phenomenon of hydrogen within Ni-membrane were used in Japanese proto-type SFR “Monju”. However, during the plant operation, detection signals of water leakage were observed even in the situation without SWR concerning temperature up and down in the cooling system. For this reason, the study of a new hydrogen detector has been carried out to improve stability, accuracy and reliability. In this research, the authors focus on the difference in composition of hydrogen and the difference between the background hydrogen under normal plant operation and the one generated by SWR and theoretically estimate the hydrogen behavior in liquid sodium by using ultra-accelerated quantum chemical molecular dynamics (UA-QCMD). Based on the estimation, dissolved H or NaH, rather than molecular hydrogen (H2), is the predominant form of the background hydrogen in liquid sodium in terms of energetical stability. On the other hand, it was found that hydrogen molecules produced by the sodium-water reaction can exist stably as a form of a fine bubble concerning some confinement mechanism such as a NaH layer on their surface. At the same time, we observed experimentally that the fine H2 bubbles exist stably in the liquid sodium, longer than previously expected. This paper describes the comparison between the theoretical estimation and experimental results based on hydrogen form in sodium in the development of the new hydrogen detector in Japan.