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MIXED MODES INTERLAMINAR FRACTURE TOUGHNESS OF CFRP LAMINATES TOUGHENED WITH CNF INTERLAYER

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Acta Mechanica Solida Sinica 2012年第3期25卷 321-330页

作者： Masahiro Arai Tatsuya Sasaki Satoshi Hirota hiroaki Ito Ning Hu Marino Quaresimin Shinshu University 4-17-1 Wakasato Nagano-shi Nagano 380-8553 Japan Chiba University 1-33 Yayoi-cho Inage-ku Chiba-shi Chiba 263-8522 Japan University of Padova Stradella San Nicola 3 36100 Vicenza Italy

In the present paper, the influence of carbon nanofiber on interlaminar fracture toughness of CFRP investigated using MMB（Mixed Mode Bending） tests. Vapor grown carbon fiber VGCF and VGCF-S, and multi-walled carbon nanotube MWNT-7 has been employed for the toughener of the interlayer on the CFRP laminates. In order to evaluate the fracture toughness and mixed mode ratio of it, double cantilever beam （DCB） tests, end notched fracture （ENF） tests and mixed mode bending （MMB） tests have been carried out. Boundary element analysis was applied to the CFRP model to compute the interlaminar fracture toughness, where extrapolation method was used to determine the fracture toughness and mixed mode ratio. The interlaminar fracture toughness and mixed mode ratio can be extrapolated by stress distribution in the vicinity of the crack tip of the CFRP laminate. It was found that the interlaminar fracture toughness of the CFRP laminates was improved inserting the interlayer made by carbon nanofiber especially in the region where shear mode deformation is dominant.

关键词： CFRP laminate fracture toughness interlaminar crack boundary element method,interlayer

Automatic registration of MLS point clouds and SfM meshes of urban area

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Geo-Spatial Information Science 2016年第3期19卷 171-181页

作者： Reiji Yoshimura hiroaki Date Satoshi Kanai Ryohei Honma Kazuo Oda Tatsuya Ikeda Graduate School of Information Science and Technology Hokkaido UniversitySapporoJapan Asia Air Survey Co. LtdKawasakiJapan

Recent advances in 3D scanning technologies allow us to acquire accurate and dense 3D scan data of large-scale environments ***,there are various methods for acquiring largescale 3D scan data,such as Mobile Laser Scanning(MLS),Airborne Laser Scanning,Terrestrial Laser Scanning,photogrammetry and Structure from Motion(SfM).Especially,MLS is useful to acquire dense point clouds of road and road-side objects,and SfM is a powerful technique to reconstruct meshes with textures from a set of digital *** this research,a registration method of point clouds from vehicle-based MLS(MLS point cloud),and textured meshes from the SfM of aerial photographs(SfM mesh),is proposed for creating high-quality surface models of urban areas by combining *** general,SfM mesh has non-scale information;therefore,scale,position,and orientation of the SfM mesh are adjusted in the registration *** our method,first,2D feature points are extracted from both SfM mesh and MLS point *** process consists of ground-and building-plane extraction by region growing,random sample consensus and least square method,vertical edge extraction by detecting intersections between the planes,and feature point extraction by intersection tests between the ground plane and the ***,the corresponding feature points between the MLS point cloud and the SfM mesh are searched efficiently,using similarity invariant features and ***,the coordinate transformation is applied to the SfM mesh so that the ground planes and corresponding feature points are ***,scaling Iterative Closest Point algorithm is applied for accurate *** results for three data-sets show that our method is effective for the registration of SfM mesh and MLS point cloud of urban areas including buildings.

关键词： Registration MLS point clouds SfM mesh urban area hash similarity invariant feature

IMMERSIVE VR VISUALIZATIONS BY VFIVE: PART 2: APPLICATIONS

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International Journal of Modeling, Simulation, and Scientific Computing 2013年第S1期4卷 54-69页

作者： AKIRA KAGEYAMA NOBUAKI OHNO SHINTARO KAWAHARA KAZUO KASHIYAMA hiroaki OHTANI Graduate School of System Informatics Kobe University Kobe 657-8501Japan Graduate School of Simulation Studies University of Hyogo Kobe 650-0047Japan Earth Simulator Center Japan Agency for Marine-Earth Science and Technology Yokohama 236-0001 Japan Department of Civil and Environmental Engineering Chuo University Bunkyo-ku 112-8551Japan National Institute for Fusion Science Toki 509-5292 Japan The Graduate University for Advanced Studies(SOKENDAI)Toki 509-5292Japan

VFIVE is a scientific visualization application for CAVE-type immersive virtual reality(VR)*** source codes are freely *** is used as a research tool in various VR *** also lays the groundwork for developments of new visualization software for *** this paper,we pick up five CAVE systems in four different institutions in *** of VFIVE in each CAVE system are *** emphases will be placed on scientific and technical achievements made possible by VFIVE.

关键词： Virtual reality CAVE system immersive display system.

Overexpression of the receptor tyrosine kinase EphA4 in human gastric cancers

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World Journal of Gastroenterology 2008年第37期14卷 5650-5656页

作者： Mariko Oki Hiroyuki Yamamoto hiroaki Taniguchi Yasushi Adachi Kohzoh Imai Yasuhisa Shinomura First Department of Internal Medicine Sapporo Medical University School of MedicineSapporo 060-8543 Japan Sapporo Medical University Sapporo 060-8556 Japan

AIM: To clarify the expression and role of Ephrin receptor A4 (EphA4) in gastric cancer in relation to clinicopathological characteristics and the expression of fibroblast growth factor receptor 1 (FGFR1) and ephrin ligands. METHODS: Eleven gastric carcinoma cell lines, 24 paired surgical fresh specimens of gastric adenocarcinoma and adjacent nontumor tissue, 74 conventional formalin-fixed, paraffin-embedded tumor specimens, and 55 specimens spotted on tissue microarray (TMA) were analyzed. Reverse transcription-PCR (RT-PCR), real-time RT-PCR, immunohistochemistry, and cell growth assays were performed. RESULTS: Overexpression of EphA4 mRNA expres-sion was observed in 8 (73%) of 11 gastric cancer cell lines and 10 (42%) of 24 gastric cancer tissues. Over-expression of EphA4, analyzed by immunohistochemistry, was observed in 62 (48%) of 129 gastric cancer tissues. EphA4 overexpression, at the protein level, was significantly associated with depth of invasion and recurrence. EphA4 overexpression was also correlated with FGFR1 overexpression. Patients with EphA4-positive cancer had significantly shorter overall survival periods than did those with EphA4-negative cancer (P = 0.0008). The mRNAs for ephrin ligands were coexpressed in various combinations in gastric cancer cell lines and cancer tissues. Downregulation of EphA4 expression by siRNA in EphA4-overexpressing gastric cancer cell lines resulted in a significant decrease in cell growth. CONCLUSION: Our results suggest that overexpres-sion of EphA4 plays a role in gastric cancer.

关键词： Ephrin receptor A4 Gastric cancer Ephrin Fibroblast growth factor receptor 1 Prognosis

Strictly Transparent Wavelength Conversion Using Multi-Wavelength Signal Generation

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光学学报 2003年第S1期23卷 351-352页

作者： Eiichi Yamada hiroaki Sanjoh Yuzo Yoshikuni NTT Photonics Laboratories NTT Corporation 3-1 Morinosato Wakamiya Atsugi Kanagawa 243-0198 JapanNTT Photonics Laboratories NTT Corporation 3-1 Morinosato Wakamiya Atsugi Kanagawa 243-0198 JapanNTT Photonics Laboratories NTT Corporation 3-1 Morinosato Wakamiya Atsugi Kanagawa 243-0198 Japan

We succeeded in strictly transparent wavelength conversion by means of channel selection from multi-wavelength signals generated by sinusoidal modulation of input signal. Modulation-format-independent and bit-rate-ind... 详细信息

关键词： that in rate were mode of NRZ from AWG Figure

Gastric mixed adenoma-neuroendocrine tumor:A case report

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World Journal of Clinical Cases 2020年第22期8卷 5744-5750页

作者： Shuzo Kohno hiroaki Aoki Masayuki Kato Masaich Ogawa Kazuhiko Yoshida Department of Surgery The Jikei University Katsushika Medical CenterTokyo 125-8506Katsushika-kuJapan Department of Endoscopy The Jikei University Katsushika Medical CenterTokyo 125-8506Katsushika-kuJapan

BACKGROUND Gastric mixed adenoma-neuroendocrine tumors(NETs)are quite *** the 2019 world health organization classification of tumors of the digestive system,these were designated as a combination of grade 1 or grade 2 NETs and adenomas or tubular *** are no treatment guidelines for these tumors,and pathological and clinical studies are ***,we review previous case reports and present a case of gastric mixed *** SUMMARY A 66-year-old man underwent gastrointestinal endoscopy for the evaluation of upper abdominal *** examination of the biopsy specimen indicated the possibility of gastric cancer.A histopathological examination by endoscopic submucosal dissection showed a mixed adenoma-NET that was completely excised by endoscopic submucosal *** recurrence was observed on gastrointestinal endoscopy at the 6-mo *** Clinicians'awareness of this rare tumor is important for its timely diagnosis and treatment.

关键词： Adenoma Neuroendocrine tumor Diagnosis Pathology Stomach treatment Case report

Prognostic value of postoperative complication for early recurrence after curative resection of hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2018年第4期17卷 323-329页

作者： Masataka Amisaki hiroaki Saito Naruo Tokuyasu Teruhisa Sakamoto Soichiro Honjo Yoshiyuki Fujiwara Division of Surgical Oncology Department of SurgerySchool of MedicineTottori University Faculty of Medicine

Background: Postoperative complications may adversely affect oncological outcomes. The aim of this study was to evaluate the impact of postoperative complications on early-phase recurrence after curative resection for hepatocellular carcinoma(HCC).Methods: We included 145 HCC patients who underwent initial and curative resection between January2004 and December 2013. Postoperative complications of grade III or higher based on Clavien–Dindo classification were defined as clinically relevant postoperative complications. Recurrence within two years after hepatectomy was defined as early-phase ***: Thirty-eight patients(26%) developed postoperative complications. The only predictive factor for postoperative complication was longer operative duration(P = 0.037). The disease-specific survival rate of patients with complication was lower than that of patients without complications(P = 0.015). Earlyphase recurrence was observed in 20/38(53%) patients who suffered postoperative complications and36/107(34%) patients with no complications, which was statistically significant(P = 0.039). Multivariate analysis identified four factors contributing to early-phase recurrence: high serum AFP level(P = 0.042),multiple tumors(P < 0.001), poor differentiation(P = 0.036) and presence of postoperative complication(P = 0.039).Conclusions: Postoperative complication is an independent prognostic factor for early-phase recurrence after curative resection of HCC. Close observation of patients with postoperative complications may be a necessary treatment strategy for HCC.

关键词： Neoplasm metastasis Complications Risk factors Hepatocellular carcinoma

Importance of considering nutrient loadings from small watersheds to a lake-A case study of the Lake Shinji watershed,Shimane Prefecture,Japan

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 124-130页

作者： hiroaki Somura Hidenobu Kunii Yasumichi Yone Ikuo Takeda Hirokazu Sato Graduate School of Environmental and Life Science Okayama UniversityOkayama 7008530Japan Estuary Research Center Shimane UniversityMatsue 6908504Japan Faculty of Life and Environmental Science Shimane UniversityMatsue 6908504Japan

Nutrient loadings from upstream watersheds can have significant impacts on the water quality of receiving water ***,a major river is selected as the target for water quality studies,and the impact of minor rivers tends to be *** is very important to evaluate whether the impact of small rivers on the downstream water quality is *** water sampling and discharge modeling using SWAT were used to analyze the contribution of small rivers to water quality in a receiving *** this analysis,it was determined that the inflowing total nitrogen(TN)and total phosphorus(TP)concentrations from all target rivers exceeded the lake water environmental standards set by the Ministry of the *** contribution of suspended sediment(SS)and TN loads from small rivers did not vary markedly compared with their relative discharge contributions to the lake,at approximately 20%.However,the impact on TP loads to the lake from small rivers was 9.1%higher than their relative flow contributions,accounting for 28.2% of the TP ***,there is a potential to underestimate the impact of ungauged small rivers if only the major river is selected to evaluate the downstream lake water quality.

关键词： suspended sediment(SS) total nitrogen(TN) total phosphorus(TP) watershed management SWAT model

Insight into relationship between composition,thickness and electrochemistry behavior of oxide film formed on TA15under different potentials in 0.5 mol·L^(-1)H_(2)SO_(4)

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Rare Metals 2023年第5期42卷 1760-1772页

作者： Fei-Fei Huang Yi Qin Qing-Rui Wang hiroaki Yoshida Lei Wen Hai Chang Ying Jin National Center for Materials Service Safety University of Science and Technology BeijingBeijing100083China Innovation Group of Marine Engineering Materials and Corrosion Control Southern Marine Science and Engineering Guangdong LaboratoryZhuhai519080China Department of Physical Science Hiroshima UniversityHigashi-Hiroshima739-8526Japan

The oxide film formed on TA15 alloy in0.5 mol·L^(-1)H_(2)SO_(4)at different applied potentials is investigated by evaluating the film formation current density,film thickness,surface film composition,valence state,and the electrochemical *** relative quantitative spectral analysis revealed by X-ray photoelectron spectroscopy(XPS)and X-ray absorption spectra(XAS)shows that the increasing applied potential promotes the formation of thick and high-valence state *** contrasting with XAS of the reference titanium oxides,it is found that TiO_(2)within the oxide film changes from anatase type to rutile type with the potential increases to 2.00 *** oxide film formed at passive region has better protection performance,and with the increase of applied potential,the corrosion resistance of passive film increases,whereas the ND(donor density)values obtained from the Mott-Schottky(MS)results decrease with the increasing applied potential,indicating a better uniformity and protective effect of the oxide *** on above facts,the model of the oxide films formed on TA15 at different applied potentials in passive region and dissolve region is ***,the existence forms of all the TA15alloying elements under the most corrosion resistant condition are confirmed.

关键词： TA15 Electrochemical passivation Corrosion behavior Surface compositions and structures