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Open Journal of Fluid Dynamics 2022年第3期12卷 249-262页

作者： Shumpei Hara Kazuki Ishii yasuo Kawaguchi Department of Mechanical Engineering Doshisha University Kyoto Japan Department of Mechanical Engineering Tokyo University of Science Chiba Japan

A shear-induced structure (SIS) is formed under appropriate concentration and shear conditions in a surfactant micellar solution. In this study, we performed experiments of surfactant solution dosing in a fully developed two-dimensional turbulent channel flow from a sintered metallic wire mesh plate attached to a side wall. We investigated the behavior of the solution under the elongation during its passing through the wire mesh and under the strong shear due to the channel flow. It was confirmed that the dosed solution containing a laser dye was visualized by a laser sheet, and the accumulated gel from the wire mesh formed a layer and developed with time. Consequently, on dosing the dilute surfactant solution from the wire mesh, a gel-like SIS layer was formed, which majorly covered the wire mesh plate. The gel-like SIS layer on the wire mesh plate acted as a sticky solid and restricted the flow in the channel. This layer continued to grow while dosing, owing to which the pressure drop of the channel flow significantly increased. The gel-like SIS layer grew rapidly even in the turbulent flow and reached the equilibrium thickness. After the termination of the dosing, the gel layer collapsed gradually. In addition, the thickness of the gel-like SIS layer (indicating the strength indirectly) strongly depended on the surfactant concentration and the elongation rate in the wire mesh.

关键词： Turbulent Channel Flow Viscoelastic Fluid Gelation Scalar Transfer PIV/PLIF

Study on the Shear Effect on Dye Patches Diffused in Wall-Bounded Shear Flow

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Open Journal of Fluid Dynamics 2016年第4期6卷 438-452页

作者： Qianqian Shao Takahiro Tsukahara yasuo Kawaguchi Department of Mechanical Engineering Tokyo University of Science Chiba Japan

This paper focuses on the high intensity filaments (dye patches) embedded in dye plumes in a wall-bounded shear flow, to investigate the shear effect on the dye patch distribution. Motivated by the widely concerned inverse estimation of the source location, we try extracting useful information to know the source location from down-stream dye patches. Accordingly, we changed the dye injection location at different distances from the wall and made observations at different downstream (diffusion) distances from the source. The orientation angle and roundness of dye patches were concerned to examine the shear effect and dye patch characteristics. To capture the dye plume images, a planar laser induced fluorescence (PLIF) technique was used. The orientation and roundness of each dye patch were calculated by least-square fitting. The statistics of both the orientation angle and the roundness were compared with those in homogeneous turbulent cases to reveal the shear effect. Different from uniformly-orientated dye patches in the homogeneous flow, larger occurrence probabilities with positive orientation angles of dye patches are observed in wall-bounded shear flow, in particular, when the injection location is near the wall. As with information extraction for the inverse estimation of source location, it is found that the orientation distribution of dye patches is independent of the diffusion distance, but related with the injection location from the wall. While for the homogeneous flow cases, a strong dependence on the diffusion distance is observed in the orientation distribution profiles. As for the roundness, similar aspects are found regarding the dependencies on the injection location in shear flow and on diffusion distance in homogeneous flow.

关键词： Dye Patch Image Processing Inverse Problem Least-Square Fitting Passive Scalar Shear Flow Source Estimation Point-Source Diffusion Wall Turbulence

Life prognosis of sentinel node navigation surgery for early-stage gastric cancer:Outcome of lymphatic basin dissection

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World Journal of Gastroenterology 2021年第46期27卷 8010-8030页

作者： Shinichi Kinami Naohiko Nakamura Tomoharu Miyashita Hidekazu Kitakata Sachio Fushida Takashi Fujimura yasuo Iida Noriyuki Inaki Toru Ito Hiroyuki Takamura Department of Surgical Oncology Kanazawa Medical UniversityKahoku 920-0293IshikawaJapan Department of Gastroenterological Endoscopy Kanazawa Medical UniversityKahoku 920-0293IshikawaJapan Department of Gastrointestinal Surgery Kanazawa UniversityKanazawa 920-8641IshikawaJapan Department of Surgery Toyama City HospitalToyama 939-8511ToyamaJapan Department of Mathematics Division of General EducationKanazawa Medical UniversityKahoku 920-0293IshikawaJapan

BACKGROUND Lymphatic basin dissection is a sentinel node biopsy method that is specific for gastric *** this method,the dyed lymphatic system is dissected en bloc,and sentinel nodes are identified at the back table(ex vivo).Even with lymphatic basin dissection,blood flow to the residual stomach can be preserved,and functionpreserving curative gastrectomy can be *** oncological safety of function-preserving curative gastrectomy combined with lymphatic basin dissection has not yet been fully *** hypothesized that the oncological safety of sentinel node navigation surgery(SNNS)is not inferior to that of the *** To investigate the life prognosis of SNNS for gastric cancer in comparison with guidelines *** This was a retrospective cohort *** were selected from gastric cancer patients who underwent sentinel node biopsy from April 1999 to March *** from April 1999 to August 2008 were from the Department of Surgery II,Kanazawa University Hospital,and patients from August 2009 to March 2016 were from the Department of Surgical Oncology,Kanazawa Medical University *** who were diagnosed with gastric cancer,which was preoperatively diagnosed as superficial type(type 0),5 cm or less in length,clinical T1-2 and node negative,and underwent various gastrectomies guided by sentinel node navigation were retrospectively *** overall survival(OS)and relapsefree survival(RFS)of these patients(SNNS group)were *** with gastric cancer of the same stage and who underwent guidelines gastrectomy with standard nodal dissection were also selected as the control *** A total of 239 patients in the SNNS group and 423 patients in the control group were *** nodal metastasis was observed in 10.5%and 10.4%of the SNNS and control groups,*** diagnostic abilities of sentinel node biopsy were 84%and 98.6%for sensitivity and accuracy,*** the

关键词： Early gastric cancer Sentinel node biopsy Function preserving surgery Lymph node dissection Gastrectomy Lymphatic basin dissection

新疆阿尔泰山南部富蕴右旋走滑断裂带晚第四纪错断水系的遥感分析研究

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第四纪研究 2008年第2期28卷 273-279页

作者：张之武付碧宏 yasuo Awata 中国科学院青藏高原研究所北京100085 中国科学院地质与地球物理研究所北京100029 日本经济产业省产业技术综合研究所日本筑波305-8567

富蕴断裂带位于阿尔泰山南侧，横切阿尔泰山褶皱带南缘及额尔齐斯深断裂，是一条呈北北西向展布的右旋走滑断裂带。沿断裂带发育一系列错断水系、错断冲积扇、挤压脊、走滑拉分盆地等反映右旋走滑活动的典型构造地貌标志。本研究在高分... 详细信息

富蕴断裂带位于阿尔泰山南侧，横切阿尔泰山褶皱带南缘及额尔齐斯深断裂，是一条呈北北西向展布的右旋走滑断裂带。沿断裂带发育一系列错断水系、错断冲积扇、挤压脊、走滑拉分盆地等反映右旋走滑活动的典型构造地貌标志。本研究在高分辨率遥感图像和数字高程模型分析的基础上，结合野外实地构造地貌测量，对沿富蕴断裂带发育的系统错断水系特征进行了详细分析研究。研究结果表明，沿富蕴断裂带发育不同级别的错断水系，大致可划分为6级：1931年地震形成的冲沟；90m左右断距的错断水系；150m左右断距的错断水系；500m左右断距的错断水系；1500m左右断距的错断水系；2000m以上断距的错断水系。同时，结合研究区及邻区的第四纪冰川资料讨论了不同级别水系可能形成时间：恰尔沟三级支流可能形成时间为末次冰期Ⅲ阶段末期，约20ka；恰尔沟二级支流可能形成时间为末次冰期Ⅰ阶段末期，约120ka；恰尔沟一级支流可能形成于该地区冰川广泛消融的倒数第2次冰期的Ⅱ阶段末期，约为250ka；恰尔沟、水磨沟、白杨沟、乌铁布拉克河、卡布尔特河等可能形成于倒数第3次冰期Ⅱ阶段末期，约为360ka。最后，我们估算出富蕴断裂带晚第四纪以来的平均右旋走滑速率为1．46—4．99mm／a。

关键词：右旋走滑走滑速率系统水系错断富蕴断裂带阿尔泰山

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Journal of Signal and Information Processing 2018年第2期9卷 73-91页

作者： Teruki Horie Masato Uchida yasuo Matsuyama Department of Computer Science and Engineering Waseda University Tokyo Japan Faculty of Science and Engineering Waseda University Tokyo Japan

In this paper, we present machine learning algorithms and systems for similar video retrieval. Here, the query is itself a video. For the similarity measurement, exemplars, or representative frames in each video, are extracted by unsupervised learning. For this learning, we chose the order-aware competitive learning. After obtaining a set of exemplars for each video, the similarity is computed. Because the numbers and positions of the exemplars are different in each video, we use a similarity computing method called M-distance, which generalizes existing global and local alignment methods using followers to the exemplars. To represent each frame in the video, this paper emphasizes the Frame Signature of the ISO/IEC standard so that the total system, along with its graphical user interface, becomes practical. Experiments on the detection of inserted plagiaristic scenes showed excellent precision-recall curves, with precision values very close to 1. Thus, the proposed system can work as a plagiarism detector for videos. In addition, this method can be regarded as the structuring of unstructured data via numerical labeling by exemplars. Finally, further sophistication of this labeling is discussed.

关键词： Similar Video Retrieval Exemplar Learning M-Distance Sequence Alignment Data Structuring

Sudden Noise Reduction Based on GMM with Noise Power Estimation

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Journal of Software Engineering and Applications 2010年第4期3卷 341-346页

作者： Nobuyuki Miyake Tetsuya Takiguchi yasuo Ariki Graduate School of Engineering Kobe University Kobe Japan.

This paper describes a method for reducing sudden noise using noise detection and classification methods, and noise power estimation. Sudden noise detection and classification have been dealt with in our previous study. In this paper, GMM-based noise reduction is performed using the detection and classification results. As a result of classification, we can determine the kind of noise we are dealing with, but the power is unknown. In this paper, this problem is solved by combining an estimation of noise power with the noise reduction method. In our experiments, the proposed method achieved good performance for recognition of utterances overlapped by sudden noises.

关键词： Sudden Noise Model-Based Noise Reduction Speech Recognition

Displacement and timing of left-lateral faulting in the Kunlun Fault Zone,northern Tibet,inferred from geologic and geomorphic features

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Displacement and timing of left-lateral faulting in the Kunl...

Identification of cellular genes showing differential expression associated with hepatitis B virus infection

中国科学院地质与地球物理研究所2007学术年会

作者：付碧宏 yasuo Awata State Key Laboratory of Lithospheric Evolution.Institute of Geology and Geophysics Chinese Academy of Sciences Active Fault Research Center.AIST.Tsukuba 305-8567 Japan

The E-W to WNW-ESE striking Kunlun Fault Zone,extending about 1600 km,is one of the large strike-slip faults in the northern Tibet,*** a major strike-slip fault,it plays an important role on the extrusion of Tibet Plateau in accommodating northeastward shortening caused by the India-Asia ***,the time of initiation left-lateral faulting of the Kunlun Fault Zone is still largely debated,ranging from the Middle to Late Triassic(240-200 Ma) to early Quaternary(2 Ma).We document displaced basement rocks and geomorphic features along the Kunlun Fault Zone,based on tectono-geomorphic interpretation of satellite remote sensing images and field geologic and geomorphic *** results show that the largest cumulative offset of basement rocks is likely to be 100±20 ***,a series of pull-apart basins(Kusai,Xiugou and Tuosu lake basins) and pressure ridges(East Deshuiwai and Maji Snow Mountains),each 45-70 km long and～8-12 km wide,are developed along the Kunlun Fault Zone,which resulted from long-term tectono-geomorphic growth since the Late Miocene or Early *** evidence indicates that the Kunlun Fault Zone had a long-term slip rate of ca.10 mm/yr during the late *** slip rate is similar to that shown by present-day GPS measurements. Thus,we estimate that the Kunlun Fault Zone probably began left-lateral faulting at 10±2 Ma based on a total displacement of 100±20 km,and assuming a constant long-term slip rate of ca.10 mm/yr for several millions of *** this timing constraint on initiation of left-lateral faulting of the Kunlun Fault Zone is consistent with widespread tectonic deformation which occurred in the Tibetan Plateau.

关键词： Left-lateral faulting Displaced basement rocks Pull-apart basin Pressure ridge Kunlun Fault Zone Northern Tibet

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World Journal of Hepatology 2012年第4期4卷 139-148页

作者： yasuo Fukuhara Takeshi Suda Makoto Kobayashi Yasushi Tamura Masato Igarashi Nobuo Waguri Hirokazu Kawai Yutaka Aoyagi Division of Gastroenterology and Hepatology Graduate School of Medical and Dental Sciences Niigata University 1-757 Asahimachi-dori Chuo-ku Niigata Niigata 951-8122 Japan

AIM: To investigate the impact of hepatitis B virus (HBV) infection on cellular gene expression, by conducting both in vitro and in vivo studies. METHODS: Knockdown of HBV was targeted by stable expression of short hairpin RNA (shRNA) in huH-1 cells. Cellular gene expression was compared using a human 30K cDNA microarray in the cells and quantified by real-time reverse transcription-polymerase chain reaction (RT-PCR) (qRT-PCR) in the cells, hepatocellular carcinoma (HCC) and surrounding non-cancerous liver tissues (SL). RESULTS: The expressions of HBsAg and HBx protein were markedly suppressed in the cells and in HBx transgenic mouse liver, respectively, after introduction of shRNA. Of the 30K genes studied, 135 and 103 genes were identified as being down- and up-regulated, respectively, by at least twofold in the knockdown cells. Functional annotation revealed that 85 and 62 genes were classified into four up-regulated and five down-regulated functional categories, respectively. When gene expression levels were compared between HCC and SL, eight candidate genes that were confirmed to be up- or down-regulated in the knockdown cells by both microarray and qRT-PCR analyses were not expressed as expected from HBV reduction in HCC, but had similar expression patterns in HBV- and hepatitis C virus-associated cases. In contrast, among the eight genes, only APM2 was constantly repressed in HBV non-associated tissues irrespective of HCC or SL. CONCLUSION: The signature of cellular gene expression should provide new information regarding the pathophysiological mechanisms of persistent hepatitis and hepatocarcinogenesis that are associated with HBV infection.

关键词： Hepatitis B virus Differential gene expression Hepatocellular carcinoma Gene expression signature Adipose most abundant 2

Appendicitis with psoas abscess successfully treated by laparoscopic surgery

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World Journal of Gastroenterology 2014年第25期20卷 8317-8319页

作者： Yasunori Otowa yasuo Sumi Shingo Kanaji Kiyonori Kanemitsu Kimihiro Yamashita Tatsuya Imanishi Tetsu Nakamura Satoshi suzuk. Kenichi Tanaka Yoshihiro Kakeji Division of Gastrointestinal Surgery Department of SurgeryKobe University Graduate School of Medicine 7-5-2 Kusunokichou Chuo-ku Kobe Hyogo Prefecture 650-0017 Japan Division of Gastrointestinal Surgery Department of SurgeryKobe University Graduate School of Medicine7-5-2 KusunokichouChuo-ku KobeHyogo Prefecture 650-0017Japan

Although acute appendicitis is a common disease, retroperitoneal abscesses are rarely observed. Here, we report a case consisting of a psoas abscess and cutaneous fistula caused by appendicitis. The patient was a 56-year-old male who was introduced to our institution due to an intractable right psoas abscess. Imaging tests had been performed over the previous 3 years; however, clinicians could not find the origin of the abscess and failed to resolve the problem. A successful operation was performed via a laparoscopic approach, and 17 mo have passed without recurrence. The advantage of laparoscopic surgery is well understood in cases of appendicitis with abscesses. However, the indication for laparoscopic approach is not clear for retroperitoneal abscesses. From our experience, we can conclude that appendicitis with retroperitonealabscesses can be managed and treated using a laparoscopic approach.

关键词： Appendicitis Laparoscopic surgery Psoas abscess Retroperitoneal abscess Right leg pain

一组高效稳定纤维素分解菌复合系MC1的筛选及功能

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环境科学 2002年第3期23卷 36-39页

作者：崔宗均李美丹朴哲黄志勇 Masaharu Ishii yasuo Igarashi 中国农业大学作物学院北京100094 中国科学院微生物研究所北京100080 东京大学农学部应用生命工学

从 4种堆肥样品中分别筛选出纤维素分解能力较强的 4组混合菌 ,再以酸碱反应互补的原则重新优化组合并驯化成 1组纤维素分解能力非常强而稳定的纤维素分解菌复合系MC1 .1 0 0mL培养物在 5 0℃静止培养 72h ,分别可分解 0 48g滤纸、0 ... 详细信息

从 4种堆肥样品中分别筛选出纤维素分解能力较强的 4组混合菌 ,再以酸碱反应互补的原则重新优化组合并驯化成 1组纤维素分解能力非常强而稳定的纤维素分解菌复合系MC1 .1 0 0mL培养物在 5 0℃静止培养 72h ,分别可分解 0 48g滤纸、0 49g脱脂棉、0 1 9g麦秆和 0 0 8g锯末 .分解滤纸时 ,第 2 4hCMC糖化力最高 ,为1 2 2 3U·mL- 1.在初始pH4～ 1 0的不同培养基上接种 ,均能把 pH调到中性 ,最后稳定在 8 0～ 8 5之间 .在连续投放滤纸情况下纤维素分解能力稳定保持 2 0d以上 ,其发酵液的 pH在有滤纸时稳定在 6 0～ 6 5之间 ,没有滤纸时稳定在 8 0～ 8

关键词：纤维素分解菌复合系功能稳定