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国际政治研究 2000年第2期21卷 67-70页

作者： takashi itoh 周杰日本大学

始于泰铢贬值的1997年亚洲金融危机已经先后蔓延到了马来西亚、印度尼西亚和韩国,给亚洲经济带来了深重的灾难。虽然这些国家的经济最近已开始复苏.但是,作为导致各国危机的原因之一,软弱的以银行为基础的深受政府影响的金融系统却几乎... 详细信息

始于泰铢贬值的1997年亚洲金融危机已经先后蔓延到了马来西亚、印度尼西亚和韩国,给亚洲经济带来了深重的灾难。虽然这些国家的经济最近已开始复苏.但是,作为导致各国危机的原因之一,软弱的以银行为基础的深受政府影响的金融系统却几乎一成不变地保留了下来。本文试通过考察这种受管制的金融系统来分析亚洲金融危机,并尝试为经济复苏提出一些建议。

关键词：金融系统东亚投资者银行家金融家亚洲金融危机

Streamline pair selection for comparative flow field visualization

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 215-226页

作者： Shoko Sawada Takayuki itoh takashi Misaka Shigeru Obayashi Tobias Czauderna Kingsley Stephens Ochanomizu University 2-1-1 OtsukaBunkyo-kuTokyo 1128610Japan Tohoku University 2-1-1 KatahiraAoba-kuSendaiMiyagi 9808577Japan Monash University Wellington RoadClaytonVictoriaAustralia

Fluid dynamics simulation is often repeated under varying *** leads to a generation of large amounts of results,which are difficult to *** compare results under different conditions,it is effective to overlap the streamlines generated from each condition in a single three-dimensional *** is a curved line,which represents a wind *** paper presents a technique to automatically select and visualize important streamlines that are suitable for the comparison of the simulation ***,we present an implementation to observe the flow fields in virtual reality spaces.

关键词： Computational fluid dynamics Streamline selection Comparative flow field visualization Virtual reality

Jumbo biopsy is useful for the diagnosis of colonic prolapsing mucosal polyps with diverticulosis

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World Journal of Gastroenterology 2006年第10期12卷 1634-1636页

作者： Shingo Kato Kazutoshi Hashiguchi Ryuichi Yamamoto Mitsuru Seo takashi Matsuura Kazuro itoh Akinori Iwashita Soichiro Miura Fukuoka Japan Self Defense Forces Hospital Japan Second Department of Internal Medicine National Defense Medical CollegeTokorozawa CityJapan Second Department of Internal Medicine National Defense Medical College Tokorozawa CityJapan KKR Hamanomachi Hospital Department of Pathology Chikushi Hospital Fukuoka UniversityJapan

We report here a case of multiple prolapsing mucosal polyps with diverticulosis in the sigmoid colon. A 52-year- old man was admitted to our hospital because of bloody diarrhea. Colonoscopy and barium enema showed multiple diverticula, markedly thickened mucosal folds and polypoid lesions with mucus on the top of them in the sigmoid colon. Endoscopic ultrasonography showed thickening of the mucosal and submucosal layers. Several endoscopic biopsy specimens were taken from the polypoid lesions. Histological examination revealed only chronic inflammatory cell infiltration. In order to obtain a definite diagnosis, we performed endoscopic jumbo biopsy for the polypoid lesions after obtaining informed consent. Histological examination revealed marked lymphocyte infiltration, hemosiderin deposits and fibromuscular obliteration in the lamina propria, features similar to those of mucosal prolapsing syndrome. After anti-diarrhetic treatment, clinical findings were improved. Thus, jumbo biopsy is useful for diagnosis and treatment of prolapsing mucosal polyps.

关键词： Colon Diverticulum Jumbo biopsy Prolapsing mucosal polyp

Glycolytic Synchronization in Yeast Cells via ATP and Other Metabolites: Mathematical Analyses by Two-Dimensional Reaction-Diffusion Models

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Natural Science 2014年第10期6卷 719-732页

作者： Hiroshi Serizawa takashi Amemiya Kiminori itoh Graduate School of Environment and Information Sciences Yokohama National University Yokohama Japan

Possibilities of synchronized oscillations in glycolysis mediated by various extracellular metabolites are investigated theoretically using two-dimensional reaction-diffusion systems, which originate from the existing seven-variable model. Our simulation results indicate the existence of alternative mediators such as ATP and 1,3-bisphosphoglycerate, in addition to already known acetaldehyde or pyruvate. Further, it is also suggested that the alternative intercellular communicator plays a more important role in the respect that these can synchronize oscillations instantaneously not only with difference phases but also with different periods. Relations between intercellular coupling and synchronization mechanisms are also analyzed and discussed by changing the values of parameters such as the diffusion coefficient and the cell density that can reflect in tercellular coupling strength.

关键词： Acetaldehyde ATP Glycolytic Oscillation Intercellular Coupling Reaction-Diffusion Model Synchronization

Endoscopic papillectomy of minor papillar adenoma associated with pancreas divisum

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World Journal of Gastroenterology 2009年第9期15卷 1138-1140页

作者： Akira Kanamori takashi Kumada Seiki Kiriyama Yasuhiro Sone Makoto Tanikawa Yasuhiro Hisanaga Hidenori Toyoda Hiroki Kawashima Akihiro itoh Yoshiki Hirooka Hidemi Goto Department of Gastroenterology Ogaki Municipal HospitalOgaki 503-8502Japan Department of Gastroenterology Nagoya University Graduate School ofMedicineNagoya 466-8560Japan Department of Gastroenterology Nagoya University Graduate School of MedicineNagoya 466-8560Japan Department of Endoscopy Nagoya University HospitalNagoya 466-8560Japan

Tumors of the minor papilla of the duodenum are quite *** successfully and safely treated an 18-mm adenoma of the minor papilla associated with pancreas divisum using endoscopic papillectomy.A 64-year-old man was admitted to our hospital for treatment of an asymptomatic mass in the minor papilla detected by upper gastrointestinal *** analysis showed an 18-mm,whitish,sessile mass,located in the duodenum proximal to a normal-appearing major *** retrograde pancreatography did not reveal the pancreatic *** resonance cholangiopancreatography showed a lack of the ventral pancreatic *** suspected this case was associated with pancreatic divisum;therefore,we performed endoscopic papillectomy of the minor papilla ***,endoscopic pancreatic stent placement in the minor papilla was done to prevent drainage *** patient has been asymptomatic without recurrence of tumor or stenosis of the Santorini orifice upon endoscopic examination for the past 2 years.

关键词： Endscopic papitlectomy Minor papill aradenoma Pancreas divisum Endoscopic pancreatic stent Endoscopic retrograde pancreatography

Tree Network Formation in Poisson Equation Models and the Implications for the Maximum Entropy Production Principle

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Natural Science 2014年第7期6卷 514-527页

作者： Hiroshi Serizawa takashi Amemiya Kiminori itoh Graduate School of Environment and Information Sciences Yokohama National University Yokohama Japan

This paper presents not only practical but also instructive mathematical models to simulate tree network formation using the Poisson equation and the Finite Difference Method (FDM). Then, the implications for entropic theories are discussed from the viewpoint of Maximum Entropy Production (MEP). According to the MEP principle, open systems existing in the state far from equilibrium are stabilized when entropy production is maximized, creating dissipative structures with low entropy such as the tree-shaped network. We prepare two simulation models: one is the Poisson equation model that simulates the state far from equilibrium, and the other is the Laplace equation model that simulates the isolated state or the state near thermodynamic equilibrium. The output of these equations is considered to be positively correlated to entropy production of the system. Setting the Poisson equation model so that entropy production is maximized, tree network formation is advanced. We suppose that this is due to the invocation of the MEP principle, that is, entropy of the system is lowered by emitting maximal entropy out of the system. On the other hand, tree network formation is not observed in the Laplace equation model. Our simulation results will offer the persuasive evidence that certifies the effect of the MEP principle.

关键词： Dissipative Structure Far from Equilibrium Fractal Poisson Equation Maximum Entropy Production (MEP) Principle Minimum Entropy Production (MinEP) Principle Tree Network

Sufficient noise and turbulence can induce phytoplankton patchiness

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Natural Science 2010年第4期2卷 320-328页

作者： Hiroshi Serizawa takashi Amemiya Kiminori itoh 不详

Phytoplankton patchiness ubiquitously obser- ved in marine ecosystems is a simple phy- sical phenomenon. Only two factors are required for its formation: one is persistent variations of inhomogeneous distributions in the phytopl- ankton population and the other is turbulent stirring by eddies. It is not necessary to assume continuous oscillations such as limit cycles for realization of the first factor. Instead, a certain amount of noise is enough. Random fluctua-tions by environmental noise and turbulent ad-vection by eddies seem to be common in open oceans. Based on these hypotheses, we pro-pose seemingly the simplest method to simulate patchiness formation that can create realistic images. Sufficient noise and turbulence can induce patchiness formation even though the system lies on the stable equilibrium conditions. We tentatively adopt the two-component model with nutrients and phytoplankton, however, the choice of the mathematical model is not essen-tial. The simulation method proposed in this study can be applied to whatever model with stable equilibrium states including one-com-ponent ones.

关键词： Eddy Fluctuation Noise Patchiness Reaction-Advection-Diffusion Model Turbulence

Poorly differentiated endocrine carcinoma of the pancreas responded to gemcitabine:Case report

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World Journal of Gastroenterology 2010年第30期16卷 3853-3856页

作者： Shoichi Nakazuru Toshiyuki Yoshio Shigeki Suemura Mari itoh Manabu Araki Chiaki Yoshioka Makiyo Ohta Yuka Sueyoshi takashi Ohta Hiroko Hasegawa Kaori Morita takashi Toyama Noriyoshi Kuzushita Yoshinori Kodama Masayuki Mano Eiji Mita Department of Gastroenterology and Hepatology National Hos- pital OrganizationOsaka National Hospital2-1-14 HouenzakaChuo-kuOsaka CityOsaka 540-0006Japan Department of Pathology National Hospital OrganizationOsaka National Hospital2-1-14 HouenzakaChuo-kuOsaka CityOsaka 540-0006Japan

Poorly differentiated endocrine carcinoma (PDEC) of the pancreas is a rare and aggressive tumor. First-line treatment is commonly a combination of etoposide and cisplatin, but there is no consensus regarding further treatment recommendations. In this report, we describe a case of pancreatic PDEC treated with gemcitabine as third-line chemotherapy. A 62-year-old man with pancreatic PDEC was administered etoposide plus cisplatin as first-line treatment; he then received irinotecan for tumor relapse. However, because irinotecan induced ileus in this patient, we chose gemcitabine as thirdline chemotherapy. After two cycles of gemcitabine (1000 mg/m2 on days 1, 8 and 15 every 4 wk), a partialtumor response was noted by computed tomography (approximately 68% reduction in tumor size). Our patient survived for 15 mo after diagnosis. This is a rare case of unresectable pancreatic PDEC, which showed a partial response to gemcitabine after the failure of two other regimens. Gemcitabine could be an effective treatment option for pancreatic PDEC that is resistant to other treatments.

关键词： Poorly differentiated endocrine carcinoma Pancreatic endocrine tumor Gemcitabine Chemotherapy