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Study of Electron Orbits for Formation of Toroidal Closed Flux Surface by ECH

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Plasma Science and Technology 2011年第3期13卷 342-346页

作者： Tak,ushi MAEKAWA tomokazu yoshinaga Hitoshi TANAKA Masaki UCHIDA Fumitake WATANABE Graduate School of Energy Science Kyoto University Kyoto 606-8502 Japan National Institute for Fusion Science Toki 509-5292 Japan

Electron orbits under the external vertical field （Bv） and the self poloidal field of the toroidal plasma current in a toroidal geometry are investigated by using analytic model fields in order to search for the conditions of occurence of appropriate confinement asymmetry of fast electrons along the field lines. This asymmetry efficiently and quickly generates a toroidal current, which may close the field lines in ECH-started plasmas. It is analytically shown that the characteristics of confinement asymmetry depend on the product of the major radius and the strength of the external vertical field. The results suggest that in large devices By should be lowered and also some artificial means to speed up the pitch angle scattering for the fast electrons at a higher energy range are beneficial to generate the toroidal current in order to close the filed

关键词： ECH closed flux surface electron orbit

Laryngeal Vibratory Behavior in Traditional Noh Singing

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Tsinghua Science and Technology 2012年第1期17卷 94-103页

作者： Ikuyo yoshinaga Jiangping Kong Department of Chinese Language and Literature Peking UniversityBeijing 100871China Center for Chinese Linguistics Peking UniversityBeijing 100871China

The phonation of Noh, a traditional Japanese style of singing, was investigated using electroglot- tographic and acoustical analyses. The dynamics of the laryngeal vibratory behaviors were analyzed for the singing voice of the Noh play compared with natural speech based on the Electroglottography （EGG） pa- rameters, EGG waveform, spectrum, and spectrogram. The result shows that Noh singing is characterized by low open quotient and high speed quotient. Three types of phonations are used in the singing with pressed, Vocal-Ventricular Mode （WM）, and growl voices. It was hypothesized that the period doubling ob- served in the EGG signal was reflective of WM, which was caused by the phase difference in the vocal and ventricular fold oscillations, while the damped peak amplitude in every other cycle in the EGG signal was the result of the oscillations of the aryepiglottic folds at a frequency of half of the fundamental frequency. Sub- harmonics generated by the supraglottal oscillations add unique timbre to the sounds. The results suggest that the combination of phonation types is the key factor in generating their peculiar voice qualities.

关键词： pressed voice VocaI-Ventricular Mode (VVM) growl voice Electroglottography (EGG) openquotient speed quotient

A Note on Non-Closure Property of Sublogarithmic Space-Bounded 1-Inkdot Alternating Pushdown Automata with Only Existential （Universal） States

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Journal of Computer Science & Technology 2006年第6期21卷 979-983页

作者：徐建良刘运霞 Tsunehiro yoshinaga Department of Computer Science Ocean University of China Qingdao 266100 P.R. China Department of Computer Science and Electronics Engineering Tokuyama College of Technology Shunan Japan

1-inkdot alternating pushdown automaton is a slightly modified alternating pushdown automaton with the additional power of marking at most 1 tape-cell on the input （with an inkdot） once. This paper investigates the closure property of sublogarithmic space-bounded 1-inkdot alternating pushdown automata with only existential （universal） states, and shows, for example, that for any function L（n） such that L（n） ≥ log logn and L（n） = o（log n）, the class of sets accepted by weakly （strongly） L（n） space-bounded 1-inkdot two-way alternating pushdown automata with only existential （universal） states is not closed under concatenation with regular sets, length-preserving homomorphism, and Kleene closure.

关键词： alternating pushdown automata 1-inkdot sublogarithmic space closure property

Scenario analysis for reduction of pollutant load discharged from a watershed by recycling of treated water for irrigation

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Journal of Environmental Sciences 2010年第6期22卷 878-884页

作者： Eisaku Shiratani Yoshiyuki Munakata Ikuo yoshinaga Tomijiro Kubota Koji Hamada Tadayoshi Hitomi National Institute for Rural Engineering Kokusai Kogyo Co.Ltd. National Agricultural Research Centre for Kyushu Okinawa Region

A model in which a river model was layered on a distributed model （double-layered model） was developed to analyse the transport of water and pollutants （nitrogen, phosphorus, and BOD as organic matter） in watersheds and rivers. The model was applied to the watershed of Abragafuchi Lake, Japan, where serious water pollution has occurred over three decades, and the applicability of the model was demonstrated. Scenarios of recycling of sewage treated-water into agriculture to reduce pollutant load discharged into the lake were analysed. The results showed that irrigating paddy fields with the sewage-treated water could contribute to conserving water and reducing pollutant load, with reduction rate in BOD, nitrogen, and phosphorus ranging from 6%-36%, 16%-46%, and 18%-51%, respectively. Particularly, the results indicated that, irrigating paddy fields with the treated water during non-cropping periods and the accompanying reduction in withdrawn water from the river were more effective in reducing pollutant loads discharged into the lake. Further study is required on the effect of recycled water on crop cultivation and soil conditions for safe implementation.

关键词： watershed management paddy field sewage treatment water reuse

Semantic segmentation-based semantic communication system for image transmission

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Digital Communications and Networks 2024年第3期10卷 519-527页

作者： Jiale Wu Celimuge Wu Yangfei Lin Tsutomu yoshinaga Lei Zhong Xianfu Chen Yusheng Ji The University of Electro-Communication Tokyo182-8585Japan Toyota Motor Corporation Tokyo112-8701Japan VTT Technical Research Centre of Finland OuluFinland National Institute of Informatics(NII) Tokyo101-8430Japan

With the rapid development of artificial intelligence and the widespread use of the Internet of Things, semantic communication, as an emerging communication paradigm, has been attracting great interest. Taking image transmission as an example, from the semantic communication's view, not all pixels in the images are equally important for certain receivers. The existing semantic communication systems directly perform semantic encoding and decoding on the whole image, in which the region of interest cannot be identified. In this paper, we propose a novel semantic communication system for image transmission that can distinguish between Regions Of Interest (ROI) and Regions Of Non-Interest (RONI) based on semantic segmentation, where a semantic segmentation algorithm is used to classify each pixel of the image and distinguish ROI and RONI. The system also enables high-quality transmission of ROI with lower communication overheads by transmissions through different semantic communication networks with different bandwidth requirements. An improved metric θPSNR is proposed to evaluate the transmission accuracy of the novel semantic transmission network. Experimental results show that our proposed system achieves a significant performance improvement compared with existing approaches, namely, existing semantic communication approaches and the conventional approach without semantics.

关键词： Semantic Communication Semantic segmentation Image transmission Image compression Deep learning

HER2-positive adenocarcinoma arising from heterotopic pancreas tissue in the duodenum:A case report

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World Journal of Gastroenterology 2021年第28期27卷 4738-4745页

作者： Yoshifumi S Hirokawa Takashi Iwata yoshinaga Okugawa Koji Tanaka Hiroyuki Sakurai Masatoshi Watanabe Department of Oncologic Pathology Mie University Graduate School of MedicineMie 5148507Japan Cancer Center Aichi Medical UniversityAichi 4801195Japan Department of Genomic Medicine Mie University HospitalMie 5148507Japan Department of Surgery IGA City General HospitalMie 5180823Japan Hepato-biliary-pancreatic and Transplant Surgery Mie University HospitalMie 5148507Japan

BACKGROUND Adenocarcinoma originating from heterotopic pancreas tissue is a rare ***,to our knowledge,no HER2-positive cases in the duodenum have been reported in the scientific literature nor has the efficacy of trastuzumab treatment for the disease been *** SUMMARY A 65-year-old woman whose clinical diagnosis was unresectable advanced duodenal cancer with HER2 overexpression responded well to trastuzumab *** main tumor in the duodenum reduced *** patient underwent pancreaticoduodenectomy and lymph node dissection.A small number of cancer cells remained in the submucosal layer of the duodenum and pancreas *** histological and immunohistochemical examination,the patient was diagnosed with duodenal adenocarcinoma originating from heterotopic pancreas *** Trastuzumab treatment is effective in HER2-positive adenocarcinoma originating from heterotopic pancreas tissue in the duodenum.

关键词： Heterotopic pancreas tissue Duodenal cancer Human epidermal growth factor receptor 2 Trastuzumab Conversion surgery Case report

Proton pump inhibitor step-down therapy for GERD:A multi-center study in Japan

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World Journal of Gastroenterology 2011年第11期17卷 1480-1487页

作者： Takao Tsuzuki Hiroyuki Okada Yoshiro Kawahara Ryuta Takenaka Junichiro Nasu Hidehiko Ishioka Akiko Fujiwara Fumiya yoshinaga Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan Department of Internal Medicine Tsuyama Central HospitalOkayama 708-0841Japan Ishioka clinic Hiroshima 721-0926Japan Department of Internal Medicine Okayama Saiseikai General HospitalOkayama 700-8511Japan Deparment of Internal Medicine Mihara Red Cross HospitalHiroshima 723-8512Japan

AIM:To investigate the predictors of success in stepdown of proton pump inhibitor and to assess the quality of life(QOL).METHODS:Patients who had heartburn twice a week or more were treated with 20 mg omeprazole(OPZ) once daily for 8 wk as an initial therapy(study 1).Patients whose heartburn decreased to once a week or less at the end of the initial therapy were enrolled in study 2 and treated with 10 mg OPZ as maintenance therapy for an additional 6 mo(study 2).QOL was in-vestigated using the gastrointestinal symptom rating scale(GSRS)before initial therapy,after both 4 and 8 wk of initial therapy,and at 1,2,3,and 6 mo after starting maintenance ***:In study 1,108 patients were *** characteristics were as follows;median age:63(range: 20-88)years,sex:46 women and 62 *** success rate of the initial therapy was 76%.In the patients with successful initial therapy,abdominal pain,indigestion and reflux GSRS scores were *** study 2,83 patients were *** of 83 patients completed the study 2 *** the per-protocol analysis,80%of 70 patients were successful for *** multivariate analysis of baseline demographic data and clinical information,no previous treatment for gastroesophageal reflux disease(GERD)[odds ratio (OR)0.255,95%CI:0.06-0.98]and a lower indigestion score in GSRS at the beginning of step-down therapy(OR 0.214,95%CI:0.06-0.73)were found to be the predictors of successful step-down *** improved GSRS scores by initial therapy were maintained through the step-down ***:OPZ was effective for most GERD ***,those who have had previous treatment for GERD and experience dyspepsia before stepdown require particular monitoring for relapse.

关键词： Gastroesophageal reflux disease Proton pump inhibitor Omeprazole Step-down therapy Gastrointestinal symptom rating scale

Management and associated factors of delayed perforation after gastric endoscopic submucosal dissection

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World Journal of Gastroenterology 2015年第44期21卷 12635-12643页

作者： Haruhisa Suzuki Ichiro Oda Masau Sekiguchi Seiichiro Abe Satoru Nonaka Shigetaka yoshinaga Takeshi Nakajima Yutaka Saito Endoscopy Division National Cancer Center Hospital

AIM: To identify the actual clinical management and associated factors of delayed perforation after gastric endoscopic submucosal dissection(ESD).METHODS: A total of 4943 early gastric cancer(EGC) patients underwent ESD at our hospital between January 1999 and June 2012. We retrospectively assessed the actual management of delayed perforation. In addition, to determine the factors associated with delayed perforation, after excluding 123 EGC patients with perforations that occurred during the ESD procedure, we analyzed the following clinicopathological factors among the remaining 4820 EGC patients by comparing the ESD cases with delayed perforation and the ESD cases without perforation: age, sex, chronological periods, clinical indications for ESD, status of the stomach, location, gastric circumference, tumor size, invasion depth, presence/absence of ulceration, histological type, type of resection, and procedure ***: Delayed perforation occurred in 7(0.1%) cases. The median time until the occurrence of delayed perforation was 11 h(range, 6-172 h). Three(43%) of the 7 cases required emergency surgery, while four were conservatively managed without surgical intervention. Among the 4 cases with conservative management, 2 were successfully managed endoscopically using the endoloop-endoclip technique. The median hospital stay was 18 d(range, 15-45 d). There were no delayed perforation-related deaths. Based on a multivariate analysis, gastric tube cases(OR = 11.0; 95%CI: 1.7-73.3; P = 0.013) were significantly associated with delayed ***: Endoscopists must be aware of not only the identified factors associated with delayed perforation, but also how to treat this complicationeffectively and promptly.

关键词： Early gastric cancer Endoscopic submucosal dissect

Discrete-Time Dynamic Image Segmentation Using Oscillators with Adaptive Coupling

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International Journal of Modern Nonlinear Theory and Application 2016年第2期5卷 93-103页

作者： Mio Kobayashi Tetsuya yoshinaga Department of Creative Technology Engineering National Institute of Technology Anan College Tokushima Japan Institute of Health Biosciences Tokushima University Tokushima Japan

In this study, we propose a novel discrete-time coupled model to generate oscillatory responses via periodic points with a high periodic order. Our coupled system comprises one-dimensional oscillators based on the Rulkov map and a single globally coupled oscillator. Because the waveform of a one-dimensional oscillator has sharply defined peaks, the coupled system can be applied to dynamic image segmentation. Our proposed system iteratively transforms the coupling of each oscillator based on an input value that corresponds to the pixel value of an input image. This approach enables our system to segment image regions in which pixel values gradually change with respect to a connected region. We conducted a bifurcation analysis of a single oscillator and a three-coupled model. Through simulations, we demonstrated that our system works well for gray-level images with three isolated image regions.

关键词： Discrete-Time Coupled Model Dynamic Image Segmentation Oscillatory Responses One-Dimensional Oscillator