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Gain-Scheduled State-Feedback Controller Design for LPV Systems via SV Approach
Masayuki Sato 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this note, we extend our previous result on robust stability analysis for Linear Time-Invariant Parameter-Dependent(LTIPD) systems to stability analysis for Linear Parameter-Varying(LPV) systems in which parameters are possibly time-varying, and propose a design method of Gain-Scheduled(GS) state-feedback controllers using the pro-posed stability analysis method. Multiple Slack Variables(SVs) are used to derive our analysis and synthesis methods. Conservatism of our methods decreases as the sizes of SVs, i.e. the numerical complexity, are increased. Simple numerical examples borrowed from the literaturede monstrate the effectiveness of our proposed design method.
Sato, Masayuki,Wakamatsu, Hiroki,Arai, Masayuki,Ichino, Kenichi,Iwasaki, Kazuhiko,Asakawa, Takeshi Korea Information Processing Society 2008 Journal of information processing systems Vol.4 No.4
VLSI chips have been tested using various automatic test equipment (ATE). Although each ATE has a similar structure, the language for ATE is proprietary and it is not easy to convert a test program for use among different ATE vendors. To address this difficulty we propose a tester structure expression language, a tester language with a novel format. The developed language is called the general tester language (GTL). Developing an interpreter for each tester, the GTL program can be directly applied to the ATE without conversion. It is also possible to select a cost-effective ATE from the test program, because the program expresses the required ATE resources, such as pin counts, measurement accuracy, and memory capacity. We describe the prototype environment for the GTL and the tester selection tool. The software size of the prototype is approximately 27,800 steps and 15 manmonths were required. Using the tester selection tool, the number of man-hours required in order to select an ATE could be reduced to 1/10. A GTL program was successfully executed on actual ATE.
A Survey of Assistive Listening Devices for Deaf
Sato, Masayuki D.S. 檀國大學校 特殊敎育硏究所 1996 特殊敎育要求 兒童硏究 Vol.5 No.-
최근 보청기는 청각장애인 각자의 통신욕구에 적절한 적합(fitting)이 어는 정도까지 가능한 고성능 기기가 개발되어 보급되고 있다. 그러나 이러한 보청기의 근본적인 문제점은 보청기가 화자와의 거리나 주위의 소음에 의해 많은 영향을 받는다는 점이다. 이러한 문제점을 해결하기 위해 개발되어진 기기가 ALD(Assistive Listening Devices)이다. 일본에서는 청각장애인을 위한 의사소통(Communication) 기기 혹은 보청기 주변기기로서 알려져 있다. 본 연구는 일본의 ALD 현황을 개괄하고 문제점을 검토하는데 그 목적을 두었다. ALD에는 목적에 따라 개인간 의사소통을 위한 기기, 텔레비전, 라디오등의 시청을 위한 기기, 원거리 의사소통(telecommunication)을 위한 기기, 그리고 경보등의 신호용 기기로서 구분된다. 개인간 의사소통을 위한 기기에는 화자의 음성을 주위의 소음에 영향받지 않는 명료한 음성으로 청자에게 전달하기 위한 FM보청기, Direct Audio Input 등이 개발되어, 보청기와 화자간을 송환기(microphone)나 코드(code)등으로 연결하고 있다. 텔레비전, 라디오 시청을 위한 기기에는, 개인간 의사소통 기기와 마찬가지로, Direct Audio Input 등을 사용하여 텔레비전이나 라디오등과 보청기를 코드로서 접속하여 음성을 청취한다. 원거리 의사소통을 위한 기기에는 다종다양한 기기가 개발, 보급되어 있으며, 청각장애인은 각자의 통신대상이나 통신내용에 따라 이러한 기기를 적절히 사용하고 있다. 이러한 기기의 대표적인 것으로 증폭기가 내장된 청각장애인용 전화기, 팩시밀리, 휴대용 시스템, 인터넷트 등이 있다. 경보등의 신호용 기기에는 보청기를 착용하지 않거나 없는 상황을 고려하여, 자명종의 알림소리나 긴급시의 경보음 등이 촉각이나 시각에 의해 전달, 인식되도록 진동기기, 광신호기 등의 기기가 개발되어 있다. 본 연구의 결과, 이러한 ALD 활용시의 음향적인 문제, 이용효과의 평가 등이 금후의 과제로서 지적되었다.
중국 고대 사상에 있어서의 「충신(忠信)」과 「성(誠)」개념 -그 잊어버린 다이나미즘(dynamism)-
좌등장지 ( Sato Masayuki ) 한국한문교육학회 2009 한문교육논집 Vol.33 No.-
The two concepts of `faithfulness` and `sincerity` had been as valuable as those of `humaneness and justice` or `the proprieties` for pre-Chin period. Moreover, the two concepts have played an important role in establishing a lot of ideas and thoughts of posterity. As time goes on, however, these two concepts have been lost their abundant meaning. This paper analyzes usages of concepts of `faithfulness` and `sincerity` in texts of pre-Chin period, including unearthed texts, and consequently elucidates the `lost dynamism` of these two concepts in terms of political theory.
Futagami, Masayuki,Yokoyama, Yoshihito,Sato, Tetsumi,Hirota, Kazuyoshi,Shimada, Muneaki,Miyagi, Etsuko,Suzuki, Nao,Fujimura, Masaki Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.10
Purpose: To evaluate palliative care for patients with gynecologic cancer in Japan. Materials and Method: A questionnaire asking facility characteristics, systems to coordinate palliative care, current status of end-of-life care, provision of symptom relief, palliative radiation therapy and chemotherapy, and cases of death from gynecological cancer, was mailed to facilities treating gynecologic cancer. Results: A total of 115 facilities (29.3% of the total) responded to the questionnaire. Of these, 33.0 (29.0%) had a palliative care ward. End-of-life care was managed by obstetricians and gynecologists in 72.0% of the facilities. The site where end-of-life care was provided was most often a ward in the department where the respondent worked. The waiting period for transfer to a hospice was 2 weeks or more in 52% of facilities. Before the start of primary treatment, pain control was managed by obstetrians and gynecologists in 98.0% of facilities. Palliative radiation therapy or chemotherapy was administered at 93.9% and 92.0% of facilities, respectively. Of the 115 facilities, 34.0 (29.6%) reported cases of death from gynecological cancer. There were 1,134 cases of death. The median time between the last cycle of chemotherapy and death was 85 days for all gynecological cancers. The proportion of patients receiving chemotherapy in the last 30 and 14 days of life were 17.4% and 7.1%, respectively. Conclusions: This large-scale survey showed characteristics of palliative care given to patients with gynecologic cancer in Japan. Assessment of death cases showed that the median time between the last cycle of chemotherapy and death was relatively short.
Jun Sato,Kazuhide Inage,Masayuki Miyagi,Yoshihiro Sakuma,Kazuyo Yamauchi,Masao Koda,Takeo Furuya,Junichi Nakamura,Miyako Suzuki,Go Kubota,Yasuhiro Oikawa,Takeshi Sainoh,Kazuki Fujimoto,Yasuhiro Shiga 대한척추외과학회 2017 Asian Spine Journal Vol.11 No.4
Study Design: An experimental animal study. Purpose: To evaluate effects of anti-vascular endothelial growth factor (VEGF) on the content and distribution of the calcitonin generelated peptide (CGRP) in the dorsal ganglia in a rat model. Overview of Literature: Increased expression of VEGF in degenerative disc disease increases the levels of inflammatory cytokines and nerve ingrowth into the damaged discs. In animal models, increased levels of VEGF can persist for up to 2 weeks after an injury. Methods: Through abdominal surgery, the dorsal root ganglia (DRG) innervating L5/L6 intervertebral disc were labeled (FluoroGold neurotracer) in 24, 8-week old Sprague Dawley rats. The rats were randomly allocated to three groups of eight rats each. The anti- VEGF group underwent L5/6 intervertebral disc puncture using a 26-gauge needle, intradiscal injection of 33.3 μg of the pegaptanib sodium, a VEGF165 aptamer. The control-puncture group underwent disc puncture and intradiscal injection of 10 μL saline solution, and the sham-surgery group underwent labeling but no disc puncture. Two rats in each group were sacrificed on postoperative days 1, 7, 14, and 28 after surgery. L1–L6 DRGs were harvested, sectioned, and immunostained to detect the content and distribution of CGRP. Results: Compared with the control, the percentage of CGRP-positive cells was lower in the anti-VEGF group (p <0.05; 40.6% and 58.1% on postoperative day 1, 44.3% and 55.4% on day 7, and 42.4% and 59.3% on day 14). The percentage was higher in the control group compared with that of the sham group (p <0.05; sham group, 34.1%, 40.7%, and 33.7% on postoperative days 1, 7, and 14, respectively). Conclusions: Decreasing CGRP-positive cells using anti-VEGF therapy provides fundamental evidence for a possible therapeutic role of anti-VEGF in patients with discogenic lower back pain.
Mikiko Asai-Sato,Nao Suzuki,Hitomi Sakai,Yoshio Itani,Shinya Satoh,Masayuki Futagami,Yoshio Yoshida 대한부인종양학회 2023 Journal of Gynecologic Oncology Vol.34 No.1
Objective: This study aimed to assess gynecologic oncologists (GOs)’ perceptions and attitudes toward cancer survivorship to help improve survivor care. Methods: We conducted a web-based questionnaire survey about survivorship issues for the GOs belonging to the Japan Gynecologic Oncology Group. We analyzed the proactiveness of the participants toward addressing 25 survivor issues. In addition, the practice patterns and barriers to care for survivors’ long-term health issues, such as second primary cancer (SPC) and lifestyle-related diseases (LSRD), and return-to-work (RTW) support were assessed. Results: We received 313 responses. The respondents had a mean of 22 years of physician experience. The ratio of men to women was approximately 7:3, and 84.7% worked at facilities for multidisciplinary cancer treatment. The respondents’ proactiveness for addressing psychosocial problems was significantly lower than physical and gynecological issues (p<0.01 by χ2 test). However, most GOs tried to contribute to such issues according to patients’ demands. Women GOs were more proactively involved in some survivorship issues than the men (p<0.05 by logistic regression analysis). The rates of the respondents who proactively discussed SPC, LSRD, and RTW were unexpectedly high (60.7%, 36.1%, and 52.4%, respectively). However, the GOs only provided verbal support for these issues in many cases. Conclusion: The Japanese GOs were enthusiastic about survivorship care. However, their tendency to deal with survivors’ problems through their own knowledge and judgments raises concerns about the quality of care. Therefore, creating survivorship care guidelines and enhancing multidisciplinary collaboration should be prioritized.