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ANALYSIS OF SEA SURFACE TEMPERATURE VARIABILITY IN THE COASTAL AREA OF THE NORTHEAST JAPAN
Chan Su Yang,Hitoshi Tanaka,Masaki Sawamoto,Kimio Hanawa 한국해안해양공학회 1999 학술강연회 발표논문초록집 Vol.1 No.1
Thirty-seven AVHRR images taken in the month of May from 1990 to 1994 are used to examine the sea surface temperature (SST) variability in the coastal area of the Northeast Japan. Empirical orthogonal function (EOF) analysis is adopted to study a time-series of IR images from the Sendai Bay region, to determine the dominant patterns of sea surface temperature (SST) variance in May. EOF analysis decomposed the time series into its component parts. Monthly-mean 5 images in each year are also used to make a comparison with the results of daily-image analysis. EOFs of the temporal and spatial SST variance for two kinds of image show that the dominant SST pattern is generated by spatially varying offshore water mass in the presence of the Kuroshio/Oyashio current, accounting for 95.7% (from monthly-averaged images) of the total variance. Higher modes in this area are interpreted as the result of heating and cooling of bay waters due to the interaction of offshore waters.
( Shinji Ishii ),( Suguru Fukahori ),( Kimio Asagiri ),( Yoshiaki Tanaka ),( Nobuyuki Saikusa ),( Naoki Hashizume ),( Motomu Yoshida ),( Daisuke Masui ),( Naoko Komatsuzaki ),( Naruki Higashidate ),( 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.4
Background/Aims The aim of this study is to investigate the degree of delayed gastric emptying (DGE) and evaluate how the severity of DGE affects gastroesophageal reflux disease (GERD) in neurologically impaired (NI) patients utilizing 24-hour multichannel intraluminal impedance pH measurements (pH/MII) and <sup>13</sup>C-acetate breath test (<sup>13</sup>C-ABT) analyses. Methods <sup>13</sup>C-ABT and pH/MII were conducted in 26 NI patients who were referred to our institution due to suspected GERD. At first, correlation analyses were performed to investigate the correlation between the <sup>13</sup>C-ABT parameters and the clinical or pH/MII parameters. Thereafter, all patients were divided into 2 groups (DGE and severe DGE [SDGE] group) according to each cut off half emptying time (t<sub>1/2</sub>, 90-170 minutes). Each pH/MII parameter was compared between the 2 groups in each set-up cutoff t<sub>1/2</sub>. Results The mean t<sub>1/2</sub> of all patients was 215.5 ± 237.2 minutes and the t<sub>1/2</sub> of 24 (92.3%) patients were > 100 minutes. Significant moderate positive correlations were observed between both t1/2 and lag phase time and the non-acid reflux related parameters. Furthermore, the patients in the SDGE group demonstrated higher non-acid reflux related parameters than those of the DGE groups when the cutoff was t<sub>1/2</sub> ≥ 140 minutes. Conclusion The present study demonstrated that GE with t<sub>1/2</sub> ≥ 140 minutes was related to an increase of non-acid exposure reaching up to the proximal esophagus in NI patients, and indicating that NI patients with SDGE might have a high risk of non-acid GERD. (J Neurogastroenterol Motil 2017;23:533-540)
Ha, Job,Jhang, Kyung-Young,Sasaki, Kimio,Tanaka, Hiroaki 한국비파괴검사학회 2006 한국비파괴검사학회지 Vol.26 No.2
초음파 비선형성은 적층 구조물 내부의 미세크랙이나 계면 들뜸을 검출하기 위한 수단으로 주목받고 있다. 비선형 초음파의 특징적인 현상은 전파 과정중에 고조파가 발생되는 것이다. 그러므로 비선형성의 정량화를 위해서는 수신된 초음파 신호에 포함된 고조파 성분의 검출이 중요하며, 일반적으로 2차 조화 성분과 기본 주파수 성분의 진폭비가 비선형 파라미터로 이용되고 있다. 그러나 이 비선형 파라미터를 정확하게 추정할 수 있는 방법이 확립되어 있지 않기 때문에 현재까지는 현장적용에 어려움을 겪고 있다. 본 연구에서는 초음파 비선형 파라미터의 정밀 추정을 위한 신호 처리 기술을 제안하고자 한다 이 기술은 파워 스펙트럼과 바이스펙트럼 분석에 기초하며, 특히 본 연구에서는 초음파 현미경(SAM, scanning acoustic microscope)에 사용되는 펄스형 신호로부터 고조파를 검출하는데 주목하였다. 제안된 기법의 유효성은 틈새의 크기가 접촉 중심에서 반경 방향으로 일정하게 증가하는 뉴턴링(Newton-ring)과 칩의 윗면에 국부적인 들뜸을 가진 반도체 샘플에 대한 실험을 통해 검증되었다. 결과적으로 제안된 신호처리기법에 의해 획득된 비선형 파라미터는 계면 들뜸과 좋은 상관성을 보였다. Ultrasonic nonlinearity has been considered as a solution for the detection of microcracks or interfacial delamination in a layered structure. The distinguished phenomenon in nonlinear ultrasonics is the generation of higher-order harmonic waves during the propagation. Therefore, in order to quantify the nonlinearity, the conventional method measures a parameter defined as the amplitude ratio of a second-order harmonic component and a fundamental frequency component included in the propagated ultrasonic wave signal. However, its application In field inspection is not easy at the present stage because no standard methodology has yet been made to accurately estimate this parameter. Thus, the aim of this paper is to propose an advanced signal processing technique for the precise estimation of a nonlinear ultrasonic parameter, which is based on power spectral and bispectral analysis. The method of estimating power spectrum and bispectrum of the pulse-like ultrasonic wave signal used in the commercial SAM (scanning acoustic microscopy) equipment is especially considered in this study The usefulness of the proposed method Is confirmed by experiments for a Newton ring with a continuous air gap between two glasses and a real semiconductor sample with local delaminations. The results show that the nonlinear parameter obtained tv the proposed method had a good correlation with the delamination.
Literature Review on Recent Magnetocardiography and Impedance-MagnetocardiographyTechnologies
Y. Seki,A. Tsukamoto,K. Tsukada,Hitoshi Horigome,Miki Yokokawa,Yoshihide Chiba,Kimio Tanaka,A. Kandori,T. Miyashita,K. Ogata,D. Suzuki,K. Saito,K. Yokosawa,Satsuki Yamada,Shigeyuki Watanabe,Iwao Yamag 한국초전도학회 2006 Progress in superconductivity Vol.8 No.1
Kazuhiro Takehara,Takashi Matsumoto,Junzo Hamanishi,Kosei Hasegawa,Motoki Matsuura,Kiyonori Miura,Shoji Nagao,Hidekatsu Nakai,Naotake Tanaka,Hideki Tokunaga,Kimio Ushijima,Hidemichi Watari,Yoshihito Y 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.2
Objective: The primary objective of this study was to evaluate the safety of niraparib 300 mg/dayin Japanese patients with platinum-sensitive, relapsed ovarian cancer in a maintenance setting. Methods: Phase 2, multicenter, open-label, single-arm study enrolled Japanese patients withplatinum-sensitive, relapsed ovarian cancer who had received ≥2 platinum-based regimens. The primary endpoint (incidence of grade 3 or 4 thrombocytopenia-related events within 30days after initial niraparib administration) was justified by the incidences of a global pivotalphase 3 study and its post-hoc safety analysis on thrombocytopenia, the major hematologicaladverse event of niraparib. The overall safety analysis examined other treatment-emergentadverse events (TEAEs). Results: Enrolled patients (n=19) had a median (min, max) body weight of 53.9 (40.8–79.1)kg; all but one patient weighed <77 kg. Most (94.7%) patients initially received niraparib300 mg/day but this decreased in subsequent cycles (mean±standard deviation doseintensity, 191.6±65.7 mg/day). In total, 6/19 (31.6%) patients experienced grade 3 or 4 thrombocytopenia-related events within 30 days of initial niraparib administration. Other common TEAEs included nausea, and decreased platelet or neutrophil counts. Noprogression-free or overall survival events occurred; only 1 of 4 response-evaluable patientshad a post-baseline tumor assessment (stable disease). Conclusion: The incidence of grade 3 or 4 thrombocytopenia-related events in Japaneseovarian cancer patients was similar to that in the corresponding non-Japanese study. Overall,the safety profile was acceptable and consistent with the known safety profile and previousexperience with niraparib. Trial Registration: ClinicalTrials.gov Identifier: NCT03759587