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Data-Driven Determinant-Based Greedy Under/Oversampling Vector Sensor Placement

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 1-30页

作者： Yuji Saito Keigo yamada Naoki Kanda Kumi Nakai Takayuki Nagata Taku Nonomura keisuke Asai Tohoku University SendaiMiyagi980-8579Japan

A vector-measurement-sensor-selection problem in the undersampled and oversampled cases is considered by extending the previous novel approaches:a greedy method based on D-optimality and a noise-robust greedy method in this *** of the vector-measurement-sensor selection of the greedy algorithms are proposed and applied to randomly generated systems and practical datasets of flowfields around the airfoil and global climates to reconstruct the full state given by the vector-sensor measurement.

关键词： Sparse sensor selection vector-sensor measurement

Effect of Molecular Weight and Molecular Distribution on Skin Structure and Shear Strength Distribution near the Surface of Thin-Wall Injection Molded Polypropylene

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Open Journal of Organic Polymer Materials 2016年第1期6卷 1-10页

作者： keisuke Maeda Koji yamada Kazushi yamada Masaya Kotaki Hiroyuki Nishimura Department of Advanced Fibro-Science Kyoto Institute of Technology Kyoto Japan Osaka Municipal Technical Research Institute Osaka Japan Center for Fiber and Textile Science Kyoto Institute of Technology Kyoto Japan Kaneka US Material Research Center Kaneka Americas Holding Inc. College Station TX USA

In this study, the relationship between skin structure and shear strength distribution of thin-wall injection molded polypropylene (PP) molded at different molecular weight and molecular distribution was investigated. Skin-core structure, cross-sectional morphology, crystallinity, crystal orientation, crystal morphology and molecular orientation were evaluated by using polarized optical microscope, differential scanning calorimeter, X-ray spectroscopic analyzer and laser Raman spectroscopy, respectively, while the shear strength distribution was investigated using a micro cutting method called SAICAS (Surface And Interfacial Cutting Analysis System). The results indicated that the difference of molecular weight and molecular weight distribution showed own skin layer thickness. Especially, high molecular weight sample showed thicker layer of the lamellar orientation and molecular orientation than low molecular weight sample. In addition, wide molecular distribution sample showed large crystal orientation layer.

关键词： Polypropylene Thin-Wall Injection Molding Molecular Weight and Molecular Weight Distribution Skin-Core Structure Shear Strength Distribution

The Relationship between Bulk Property and Property Distribution in Thin-Wall Injection Molded PP at Different Molecular Weight and Molecular Weight Distribution

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Advances in Materials Physics and Chemistry 2016年第1期6卷 1-8页

作者： keisuke Maeda Koji yamada Kazushi yamada Masaya Kotaki Hiroyuki Nishimura Department of Advanced Fibro Science Kyoto Institute of Technology Kyoto Japan Osaka Municipal Technical Research Institute Osaka Japan Center for Fiber and Textile Science Kyoto Institute of Technology Kyoto Japan Kaneka US Material Research Center Kaneka Americas Holding Inc. TX USA

Thin-wall injection molded parts have been paid much attention to the lightweight saving from viewpoints of natural resources saving. In the injection molding, skin-core structure can be found in the parts. This skin-core structure affects the property of completed injection molding parts (bulk property) even if in thin-wall injection molding. However, there is a few research about the relationship between bulk property and internal property distribution in the injection molding specimen. In this study, thin-wall injection molded parts of polypropylene (PP) were prepared by 4 different molecular weight and molecular weight distribution to reveal the relationship between bulk property and property distribution. These characteristics were investigated by using tensile test, fracture toughness characterized by Essential Work of Fracture (EWF) method for bulk property and film tensile test by sliced sample for tensile property distribution. The property distribution test results revealed that the highly bulk property sample had thicker highly mechanical property layer on its surface.

关键词： Molecular Weight Molecular Weight Distribution Fracture Toughness Property Distribution Thin-Wall Injection Molding

Cases of pediatric intra-abdominal solid organ injury induced by blunt trauma experienced over a 15-year period at two centers in Japan

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World Journal of Pediatric Surgery 2023年第3期6卷 168-174页

作者： Mayu Matsui Koshiro Sugita Takafumi Kawano Nanako Nishida Ayaka Nagano Masakazu Murakami keisuke Yano Toshio Harumatsu Shun Onishi Koji yamada Waka yamada Mitsuru Muto Tatsuru Kaji Satoshi Ieiri Department of Pediatric Surgery Kagoshima City HospitalKagoshimaJapan Department of Pediatric Surgery Research Field in Medical and Health SciencesMedical and Dental AreaResearch and Education AssemblyKagoshima UniversityKagoshimaJapan Department of Pediatric Surgery Kurume University School of MedicineKurumeJapan

Objective The present study attempts to clarify the clinical features of pediatric intra-abdominal solid organ injury at two *** The injured organ,patient age,sex,injury grade,imaging findings,intervention,length of hospital stay,and complications were retrospectively reviewed using medical records at two centers from 2007 to *** There were 25 cases of liver injury,9 of splenic injury,8 of pancreatic injury,and 5 of renal *** mean age of all patients was 8.6±3.8 years old,with no difference between organ injury *** intervention was performed in four cases of liver injury(16.0%)and one case of splenic injury(11.1%),and surgery was performed in two cases of liver injury(8.0%)and three cases of pancreatic injury(37.5%).All other cases were treated *** included adhesive ileus in one case of liver injury(4.0%),splenic atrophy in one case of splenic injury(11.1%),pseudocysts in three cases of pancreatic injury(37.5%),atrophy of the pancreatic parenchyma in one case of pancreatic injury(12.5%),and urinoma in one case of renal injury(20.0%).No mortalities were *** Pediatric patients with blunt trauma had favorable outcomes at two pediatric trauma centers covering a broad medical area,including remote islands.

关键词： pediatric trauma injury

Analysis of Rowing Force of the Water Strider Middle Leg by Direct Measurement Using a Bio-Appropriating Probe and by Indirect Measurement Using Image Analysis

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Cyborg and Bionic Systems 2023年第1期4卷 28-40页

作者： Kaoru Uesugi Hiroyuki Mayama keisuke Morishima Department of Mechanical Systems Engineering Ibaraki University4-12-1 Nakanarusawa-choHitachiIbaraki 316-8511Japan Department of Mechanical Engineering Osaka University2-1 Yamada-okaSuitaOsaka 565-0871Japan Global Center for Medical Engineering and Informatics Osaka University2-1 Yamada-oka SuitaOsaka 565-0871Japan Department of Chemistry Asahikawa Medical University2-1-1-1 Midorigaoka-HigashiAsahikawaHokkaido 078-8510Japan.

Rowing force of the middle leg of a water strider is one of the important factors affecting water repellency and applications in biomimetics,biomechanics,and ***,many previous studies have been based on estimated leg rowing force and lack some ***,we tried to measure leg rowing force directly by a force *** this article,we report the rowing force of water striders obtained by direct and indirect *** the direct measurement,water striders were set onto a sensor system and the rowing force of a middle leg of the set water striders was directly measured using a bioappropriating probe(BAP),a kind of *** the indirect measurement,water striders were not fixed and the rowing force of locomoting water striders was evaluated by image analysis using a high-speed *** a result,we determined the rowing force by the direct measurement to be 955μN,while the rowing force by the indirect measurement was 493μ*** considered that the indirect measurement might lack some credibility because half the propellant energy was lost in the indirect force measurement due to various other factors.

关键词： Probe indirect hook

Predictive model of risk factors of High Flow Nasal Cannula using machine learning in COVID-19

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Infectious Disease Modelling 2022年第3期7卷 526-534页

作者： Nobuaki Matsunaga keisuke Kamata Yusuke Asai Shinya Tsuzuki Yasuaki Sakamoto Shinpei Ijichi Takayuki Akiyama a Jiefu Yu Gen yamada Mari Terada Setsuko Suzuki Kumiko Suzuki Sho Saito Kayoko Hayakawa Norio Ohmagari AMR Clinical Reference Center National Center for Global Health and MedicineTokyoJapan DataRobot Inc. TokyoJapan Disease Control and Prevention Center National Center for Global Health and MedicineTokyoJapan Biostatistics Division Center for Research Administration and SupportNational Cancer CenterTokyoJapan

With the rapid increase in the number of COVID-19 patients in Japan,the number of patients receiving oxygen at home has also increased rapidly,and some of these patients have *** efficient approach to identify high-risk patients with slowly progressing and rapidly worsening COVID-19,and to avoid missing the timing of therapeutic intervention will improve patient prognosis and prevent medical *** admitted to medical institutions in Japan from November 14,2020 to April 11,2021 and registered in the COVID-19 Registry Japan were *** factors for patients with High Flow Nasal Cannula invasive respiratory management or higher were comprehensively explored using machine ***-specific cohorts were created,and severity prediction was performed for the patient surge *** were able to obtain a model that was able to predict severe disease with a sensitivity of 57%when the specificity was set at 90%for those aged 40e59 years,and with a specificity of 50%and 43%when the sensitivity was set at 90%for those aged 60e79 years and 80 years and older,*** were able to identify lactate dehydrogenase level(LDH)as an important factor in predicting the severity of illness in all age *** machine learning,we were able to identify risk factors with high accuracy,and predict the severity of the *** plan to develop a tool that will be useful in determining the indications for hospitalisation for patients undergoing home care and early hospitalisation.

关键词： COVID-19 Machine learning Severity Risk prediction Japan

Surface Roughness of SiGe/Si(110) Formed by Stress-Induced Twins and the Solution to Produce Smooth Surface

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Journal of Materials Science and Chemical Engineering 2018年第1期6卷 25-31页

作者： Junji Yamanaka Mai Shirakura Chiaya Yamamoto Naoto Utsuyama Kei Sato Takane yamada Kosuke O. Hara keisuke Arimoto Kiyokazu Nakagawa Center for Instrumental Analysis University of Yamanashi Kofu Japan Center for Creative Technology University of Yamanashi Kofu Japan Center for Crystal Science and Technology University of Yamanashi Kofu Japan

Lattice-strained Si thin films grown onto SiGe(110)/Si(110) are attracting because of their potential to realize high-speed transistors. In this study we observe surface morphology of Si/SiGe/Si(110) using scanning electron microscopy and we also observe microstructure of the identical position using cross-sectional transmission electron microscopy. These results reveal that crossing of stress-induced twins causes remarkable surface roughness. We propose using vicinal substrate to avoid this phenomenon and our successive experimental results are shown in this paper.

关键词： Strained Si SiGe(110) Stress-Induced Twin Transmission Electron Microscopy

Feasibility Study to Evaluate Lattice-Space Changing of a Step-Graded SiGe/Si (110) Using STEM Moiré

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Journal of Materials Science and Chemical Engineering 2018年第7期6卷 8-15页

作者： Junji Yamanaka Mai Shirakura Chiaya Yamamoto Kei Sato Takane yamada Kosuke O. Hara keisuke Arimoto Kiyokazu Nakagawa Akimitsu Ishizuka Kazuo Ishizuka University of Yamanashi Takeda Kofu Japan HREM Research Inc. Matsukazedai Higashimastuyama Japan

A moiré between crystal lattice planes and scanning electron beam-lines formed in a scanning transmission electron microscope includes the information of the lattice spacing. We apply these phenomena to a compositionally graded SiGe thin film deposited onto a Si substrate by molecular beam epitaxy method. The results of the experiments and image analysis show the potential of this technique to analyze a slight change of the lattice spacing according to a compositional change.

关键词： STEM Moiré SiGe Scanning Transmission Electron Microscopy

Cyclohexenonic long-chain fatty alcohol reverses diabetic induced dysfunction of ileum in the rat

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Cyclohexenonic long-chain fatty alcohol reverses diabetic in...