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Improved Dark Current Properties in Bi-Layer Structured Organic Photodetectors

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Improved Dark Current Properties in Bi-Layer Structured Orga...

Shock wave focusing in air and water

2012 International Conference on Advances in Materials Science and Engineering(AMSE 2012)

作者： Naoki ohtani Shouta Majima Department of Electronics Doshisha University

Organic photodiodes operating in the near-infrared(NIR) region with an operating wavelength of about 850 nm, which corresponds to Ga As-based optical devices, were fabricated by wet *** the active layer, Copper(II)5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine was used as NIR absorption material.A wide-bandgap polymer was doped to decrease the dark current, and an n-type organic semiconductor was doped to increase optical *** decrease the dark current further, an electron-blocking layer was added onto the *** bi-layer structure was found to be very useful for decreasing the dark *** also evaluated the on/off ratio, which is very important for application to optical communication devices.

关键词： Organic photodetectors Dark current Bi-layer structure On/off ratio

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Shock wave focusing in air and water

Statistical Analysis of the Tensile Strength of Treated Oil Palm Fiber by Utilisation of Weibull Distribution Model

第十四届全国激波与激波管学术会议

作者： Kazuyoshi Takayama Kiyonobu ohtani Shock Wave Research Center Institute of Fluid ScienceTohoku University2-1-1KatahiraAobaSendai 980-8577Japan

This is a summary of shock wave focusing studies in air and water started from mid 1970’s in the Shock Wave Research Center of the Institute of Fluid Science,Tohoku *** was primarily motivated to develop a shock tube that will neatly create imploding shock waves in *** observed,by using double exposure holographic interferometry,the motion of imploding shock *** early 1980’s,the introduction of 10 mg lead azide safely synthesized in house expanded the research field to underwater shock wave propagation and *** result was successfully directed to the shock wave applications to ***,this presentation is a chronological review of shock wave focusing studies in the Shock Wave Research *** conclusion,we emphasize that underwater shock wave study and bubble dynamics are complementary each other.

关键词： Shock wave focusing Double exposure holographic interferometry Micro explosive

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Open Journal of Composite Materials 2014年第1期4卷 72-77页

作者： Chin Voon Sia Yoshikazu Nakai Daiki Shiozawa Hiroto ohtani Department of Mechanical Engineering Kobe University Kobe Japan Department of Mechanical Engineering Kobe University Kobe Japan School of Engineering Computing and Science Swinburne University of Technology Sarawak Campus Kuching Malaysia

Oil palm fiber (OPF) extracted from empty fruit bunches is proven as a good raw material for bio-composites. The statistical variability in single fiber strength was observed due to the randomly distributed flaws along the fiber. In this study, the effect of gauge length on tensile strength of OPFs has been investigated. The Weibull/ weakest link distribution model was applied to analyse the statistical strength of OPFs. The modified Weibull distribution can predict the gauge length effect more accurately than the conventional Weibull distribution. In addition, the failure strength of the OPF was less sensitive to gauge length compared to coir fiber even though the OPF has a similarity in structures to coir fiber.

关键词： Fibers Strength Mechanical Testing Surface Treatment Gauge Length Weibull Distribution

Correlation between Leukocyte Numbers and Body Size of Rainbow Trout

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Open Journal of Immunology 2016年第3期6卷 101-110页

作者： Rzgar M. Jaafar Maki ohtani Per W. Kania Kurt Buchmann Department of Veterinary Disease Biology Faculty of Health and Medical Sciences University of Copenhagen Frederiksberg Denmark

Immune cells in rainbow trout Oncorhynchus mykiss comprise granulocytes (neutrophils, basophils and eosinophils), macrophages/monocytes and lymphocytes (B- and T-cells). These cellular elements occur early during the ontogenetic development of trout and allow both innate and adaptive responses towards an antigen to be initiated even in fry. The number of leukocytes in individual fish at different developmental stages is likely to influence the capacity of the fish to respond simultaneously to several antigens (pathogens and vaccine components). This parameter may therefore be crucial for both wild and cultured fish and we show that the size of the leukocyte population increase exponentially with body size of rainbow trout. Four groups (5 fish/ group) of naive rainbow trout (Oncorhynchus mykiss) with a mean body weight of 2-4 g (group I), 4-6 g (group II), 25-30 g (group III), and 650-780 g (group IV) were investigated. The number of lymphocytes was generally higher in head kidney compared to blood and spleen but they dominated in all samples (blood, head kidney, and spleen) and their numbers increased exponentially with fish size. Percentages of lymphocytes in relation to neutrophils and macrophages were higher in spleen (98%-99%) compared to blood and head kidney in all groups. Fish fry is therefore equipped to respond specifically against one or a few vaccine antigens but the capacity to raise protective responses against a repertoire of pathogens may be limited until the larger fingerling stage has been reached. The implications for vaccination of early fry are discussed.

关键词： Macrophages'' Leukocytes'' Neutrophils'' Rainbow trout'' Lymphocytes''

Comparison of Two Chemically-Induced Colitis-Models in Adult Zebrafish, Using Optical Projection Tomography and Novel Transcriptional Markers

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Open Journal of Immunology 2016年第4期6卷 154-180页

作者： Simon Haarder Per W. Kania Thomas Lindebo Holm Maki ohtani Kurt Buchmann Novo Nordisk-LIFE In Vivo Pharmacology Centre Frederiksberg Denmark Laboratory of Aquatic Pathobiology Department of Veterinary Disease Biology Faculty of Health and Medical Sciences University of Copenhagen Frederiksberg Denmark Global Research Novo Nordisk A/S Malov Denmark

Crohn’s disease and ulcerative colitis—inflammatory bowel diseases (IBD)—are chronic conditions with an inadequately understood pathogenesis. Employing a set of novel molecular markers in a gene expression assay (qPCR), we have used adult zebrafish to investigate two acute inflammatory models, induced by the haptenizing agents oxazolone and TNBS. In addition, goblet cell dynamics in the scales and intestine and 5-HT (serotonin) in intestinal tissues were investigated through optical projection tomography. Gene expression studies revealed a distinct and significant upregulation of proinflammatory cytokines, acute-phase reactants and metalloprotease 9 in both chemical models, primarily after 72 hours. In comparison, transcription factors and cytokines associated with Th1 and Th17 (Crohn’s) and Th2 (ulcerative colitis) were mainly not affected in this acute setting. However, elevated transcript levels were detected in Foxp3, IL-10 and T-bet, which are linked with tolerance and Tregs in mammals. Goblet cells in scales were depleted in both chemical models and in the intestine of oxazolone-treated fish. A marked 5-HT signal was noted in intestinal tissue of some chemically treated zebrafish. In conclusion, a distinct acute inflammatory reaction was induced in both chemical models. Further, oxazolone and TNBS did not result in clear-cut Th2 and Th1/Th17 pathway signaling at this early timepoint, but the applied molecular tools may provide further insight to the IBD pathogenesis and translational value of the IBD zebrafish model.

关键词： IBD Zebrafish qPCR Disease Model OPT

Non-crimp Tubular Preforming with Automation System and High Productivity

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Journal of Mechanics Engineering and Automation 2015年第8期5卷 435-439页

作者： Tadashi Uozumi Akio ohtani Asami Nakai Motohiro Tanigawa Tatsuhiko Nishida Takahiro Miura Gifu University Gifu City 501-1193 Japan Murata Machinery Ltd. Kyoto 612-8686 Japan

A new filament winding method developed in this study named MFW （multiple-supply FW） method. It performed a high productivity. In the MFW method, a large number of bobbins are used. Carbon fibers are arranged equiangularly above a mandrel, and they are wound and stacked on the mandrel simultaneously. Furthermore, CFRP pipes with non-crimp structure were made by MFW, and the torsional tests were performed in order to investigate mechanical properties comparing with braided CFRP pipes. These results made clear that the non-crimp structure by MFW was capable to improve torsional properties. The MFW machine produce non-crimp tubular preform with carbon fiber automatically. It is expected to produce non-crimp preforms for automotive parts which required high productivity.

关键词： Non-crimp structure CFRP filament winding high productivity automation.

Relationship between the Initial Fracture Stress and Fatigue Limit—Simple Prediction Method of Tensile Fatigue Limit of Composite

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Open Journal of Composite Materials 2019年第4期9卷 338-354页

作者： Y. Imai K. Nishitani G. Fortin A. ohtani H. Hamada Department of Advanced Fibro-Science Kyoto Institute of Technology Kyoto Japan

This article presents an experimental study that clarifies the relationship between the initial fracture stress and fatigue limit of glass fiber reinforced unsaturated polyester resin specimens with a laminated structure taken from a pultruded square pipe. Quasi-static bending and tension tests are performed with acoustic emission (AE) measurements to identifying the occurrence of initial fracture during testing. AE and observation results have clarified the occurrence of initial fracture was detected by maximum acoustic energy values and corresponding fiber breakage in the unidirectional (UD) bundles. Moreover, the ratio of initial fracture stress to ultimate strength is 32% in bending and 26% in tension, when comparing stress and strains on the tension side of the UD layer. These values are in good agreement with each other and with the measured tensile fatigue limit when the cyclic stress is at 25% of the tensile strength. Initial fracture stress obtained by static tests is close values to the fatigue limit which will greatly contribute to the prediction of the fatigue limit.

关键词： Initial Fracture Fatigue Limit Acoustic Emission Testing Tensile Testing Bending Testing

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日式水泥匣子

房地产导刊 2005年第Z2期 83-85页

作者： Kitten Hiroaki ohtani

这座房子无限放大在狭小城市中心的有限空间,戏剧性地把它幻化成错落有致的个人空间。在设计自住的房子时,建筑师通常会陷入自由表达个人思想的快感中,又或者陷入过犹不及的危险境地。这栋座落在神户Kobe的新建筑就印证了前者。在日本... 详细信息

这座房子无限放大在狭小城市中心的有限空间,戏剧性地把它幻化成错落有致的个人空间。在设计自住的房子时,建筑师通常会陷入自由表达个人思想的快感中,又或者陷入过犹不及的危险境地。这栋座落在神户Kobe的新建筑就印证了前者。在日本繁华城市中心建造房子通常是一个巨大挑战。你看看设计师Hiroaki ohtani在Kobe市中心为自己设计的房子你就可以看出个中无限创意。Ohtanti找到的这块地真是令人咋舌地狭长,占地面积33平方米,宽仅3米,紧紧地夹在两座房

关键词：日式房子建筑师美术家客厅水泥

Distant metastasis of hepatocellular carcinoma to Meckel’s cave and cranial nerves:A case report and review of literature

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World Journal of Hepatology 2021年第6期13卷 709-716页

作者： Soo Ki Kim Takako Fujii Ryouhei Komaki Hisato Kobayashi Toyokazu Okuda Yumi Fujii Takanobu Hayakumo Kanako Yuasa Masahiro Takami Aya ohtani Yuka Saijo Yu-Ichiro Koma Soo Ryang Kim Department of Gastroenterology Kobe Asahi HospitalKobe 653-0801HyogoJapan Division of Neurology Kobe University Graduate School of MedicineKobe 650-0017HyogoJapan Department of Radiology Kobe Asahi HospitalKobe 653-0801HyogoJapan Department of Pharmacy Kobe Asahi HospitalKobe 653-0801HyogoJapan Department of Pathology Kobe University Graduate School of MedicineKobe 650-0017HyogoJapan

BACKGROUND Metastasis occurs as a late event in the natural history of hepatocellular carcinoma(HCC),and most patients die of liver failure attributed to the tumor supplanting the ***,the brain is a less common metastatic *** SUMMARY We describe a rare case of hepatitis C virus-related multiple HCC metastasizing to the cavernous sinus,Meckel’s cave,and the petrous bone involving multiple cranial nerves in an 82-year-old *** admission imaging studies including Gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid-enhanced magnetic resonance imaging(MRI)revealed multiple HCC nodules in both right and left *** guided biopsy of the left lobe revealed moderately differentiated *** targeted therapy with Lenvatinib(8 mg/d for 94 d,per os)and Ramucirumab(340 mg/d and 320 mg/d,two times by intravenous injection)were administered for 4 mo,resulting in progression of the *** months after the start of molecular target therapy,the patient presented with symptoms of hyperalgesia of the right face and limited abduction of the right eye,indicating disturbances in the right trigeminal and abducens *** MRI disclosed a mass involving the cavernous sinus,Meckel’s cave and the petrous ***-enhanced MRI with gadolinium-chelated contrast medium revealed a well-defined mass with abnormal enhancement around the right cavernous sinus and the right Meckel’s *** The diagnosis of metastatic HCC to the cavernous sinus,Meckel’s cave,and the petrous bone was made based on neurological findings and imaging studies including MRI,but not on histological *** studies may provide insights into various methods for diagnosing HCC metastasizing to the craniospinal area.

关键词： Meckel’s cave Abducens nerve Trigeminal nerve Hepatocellular carcinoma Magnetic resonance imaging Case report