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Base flow separation for soil erosion simulation in a granitic forested headwater catchment using a process-based model, GeoWEPP

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International Journal of Sediment Research 2023年第4期38卷 494-502页

作者： Takuhei Yamasaki Shoichiro Hamamoto Taku nishimura The Graduate School of Agricultural and Life Sciences The University of Tokyo

Distributed erosion models, which simulate the physical processes of water flow and soil erosion, are effective for predicting soil erosion in forested catchments. Although subsurface flow through multiple pathways is dominant for runoff generation in forested headwater catchments, the process-based erosion model, Geo-spatial interface for Water Erosion Prediction Project(Geo WEPP), does not have an adequate subsurface component for the simulation of hillslope water flow. In the current study, the quick flow related to soil erosion during rainfall events is separated from the total hydrograph using base flow separation for Geo WEPP to use direct runoff to predict sediment discharge from a granitic-forested catchment in Japan. Water runoff and sediment discharge also are simulated using the conventional method that reproduces the total hydrograph, and the accuracy of the calculation and estimated erodibility parameters are evaluated. The proposed procedure reproduced the quick-flow runoff during rainfall and the cumulative sediment discharge from the catchment. Simultaneously, the proposed procedure overestimates water runoff during extreme weather events, such as typhoons. The estimated erodibility parameters for the hillslope soil were comparable to those of the surface soil in Japan using both the proposed procedure and the conventional one. Conversely, the channel erodibility obtained from the proposed procedure matched the observed sediment characteristics in the granitic forested catchment. The proposed procedure is a promising method to predict sediment discharge from forested catchments based on the geological features of the catchment.

关键词： Soil erosion Base flow separation GeoWEPP Headwater catchment Forest

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Quality assessment of volunteered geographic information for outdoor activities:an analysis of OpenStreetMap data for names of peaks in Japan

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Geo-Spatial Information Science 2023年第3期26卷 333-345页

作者： Jun Yamashita Toshikazu Seto Nobusuke Iwasaki Yuichiro nishimura Faculty of Social and Cultural Studies Kyushu UniversityFukuokaJapan Faculty of Letters Komazawa UniversityTokyoJapan Sciences NAROInstitute for Agro-EnvironmentalTsukubaJapan Faculty of Letters Nara Women’s UniversityNaraJapan

Geographical studies of outdoor activities have increased in recent years with the rise in popularity of these activities worldwide,including in *** geographic information(VGI)is a key tool for organizing outdoor activities as it offers a means to determine the locational information and names of *** evaluate the quality of VGI,geospatial data generated by land survey agencies and other VGI are often utilized as reference ***,since these reference data may not be available,other methods are necessary to assure the quality of *** this study,we examined five trust indicators based on the inherent characteristics of VGI through an empirical case *** used mountain names extracted from OpenStreetMap in Japan as data because there were almost no other VGI in the *** a result,we isolated three trust indicators,namely versions,users,and tag corrections,to examine the thematic accuracy of VGI because these were the only statistically significant ***,we found that the prediction rate of thematic accuracy was very *** improve thematic accuracy,this study recommends using the most accurate versions,applying correctly given tags,and considering the motivations and characteristics of the VGI contributors.

关键词： Outdoor activities volunteered geographic information(VGI) OpenStreetMap(OSM) data quality assessment trust integrated usage

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The Effect of Umami Stimulation on Salivary Secretion Rate and Duration

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Health（健康） 2024年第1期

作者： Eri Sambuichi Rumi nishimura Shiho Morishita Shigeru Watanabe

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Implementation and experiments for interactive lyrics transcreation system

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 179-194页

作者： Ayano nishimura Takayuki Itoh Ochanomizu University 2-1-1 OtsukaBunkyo-kuTokyo 1128610Japan

The evolution of the Internet has enabled us to enjoy the music created in various *** still,it is often difficult to understand the lyrics written in foreign *** translators have published many international songs with lyrics that fit the melody so that the ordinary people can enjoy the lyrics of such international *** paper discusses lyrics transcreation into the Japanese ***,the paper presents an interactive visual lyrics transcreation system and describes the details of its *** system allows users to select temporary lyrics from a set of tentative translations and then freely modify the lyrics with a real-time visualization *** also propose a lyrics translation algorithm that solves an essential problem of lyrics translation into *** this study,we interviewed two experts regarding problems with lyrics translation and received reviews of our presented *** also conducted preliminary experiments with 19 participants to determine the best combination of user interface components for our *** performed additional user experiments inviting 12 participants to compare lyrics transcreation using the presented system to manual lyrics *** transcreation by the presented system brought better results against those of manual transcreation.

关键词： Lyrics transcreation Score visualization Interactive system

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Essentials of Proteolytic Machineries in Chloroplasts

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Molecular Plant 2017年第1期10卷 4-19页

作者： Kenji nishimura Yusuke Kato Wataru Sakamoto Institute of Plant Science and Resources Okayama University 2-20-1 Chuo Kurashiki Okayama 710-0046 Japan

Plastids are unique organelles that can alter their structure and function in response to environmental and developmental stimuli. Chloroplasts are one type of plastid and are the sites for various metabolic pro- cesses, including photosynthesis. For optimal photosynthetic activity, the chloroplast proteome must be properly shaped and maintained through regulated proteolysis and protein quality control mechanisms. Enzymatic functions and activities are conferred by protein maturation processes involving consecutive proteolytic reactions. Protein abundances are optimized by the balanced protein synthesis and degrada- tion, which is depending on the metabolic status. Malfunctioning proteins are promptly degraded. Twenty chloroplast proteolytic machineries have been characterized to date. Specifically, processing peptidases and energy-driven processive proteases are the major players in chloroplast proteome biogenesis, remod- eling, and maintenance. Recently identified putative proteases are potential regulators of photosynthetic functions. Here we provide an updated, comprehensive overview of chloroplast protein degradation ma- chineries and discuss their importance for photosynthesis. Wherever possible, we also provide structural insights into chloroplast proteases that implement regulated proteolysis of substrate proteins/peptides.

关键词： chloroplast biogenesis protease protein homeostasis

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Comparative Study of Four Methods in Missing Value Imputations under Missing Completely at Random Mechanism

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Open Journal of Statistics 2014年第1期4卷 27-37页

作者： Michikazu Nakai Ding-Geng Chen Kunihiro nishimura yoshihiro Miyamoto chool of Nursing & Department of Biostatistics and Computational Biology School of Medicine University of Rochester Medical Center New York USA Department of Preventive Medicine and Epidemiologic Informatics National Cerebral and Cardiovascular Center Suita Japan

In analyzing data from clinical trials and longitudinal studies, the issue of missing values is always a fundamental challenge since the missing data could introduce bias and lead to erroneous statistical inferences. To deal with this challenge, several imputation methods have been developed in the literature to handle missing values where the most commonly used are complete case method, mean imputation method, last observation carried forward (LOCF) method, and multiple imputation (MI) method. In this paper, we conduct a simulation study to investigate the efficiency of these four typical imputation methods with longitudinal data setting under missing completely at random (MCAR). We categorize missingness with three cases from a lower percentage of 5% to a higher percentage of 30% and 50% missingness. With this simulation study, we make a conclusion that LOCF method has more bias than the other three methods in most situations. MI method has the least bias with the best coverage probability. Thus, we conclude that MI method is the most effective imputation method in our MCAR simulation study.

关键词： Missing Data Imputation MCAR Complete Case LOCF

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Re-evaluation of physical interaction between plant peroxisomes and other organelles using live-cell imaging techniques

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Journal of Integrative Plant Biology 2019年第7期61卷 836-852页

作者： Kazusato Oikawa Makoto Hayashi Yasuko Hayashi Mikio nishimura Biomacromolecules Research Team RIKEN Center for Sustainable Resource Science2-1 HirosawaWakoSaitama 351-0198Japan Department of Bioscience Nagahama Institute of Bio-Scie nee and Technology1266 Tamura-ChoNagahama 526-0829Japan Department of Biology Faculty of scienceNiigata UniversityNiigata 950-2181Japan Department of Cell Biology National Institute for Basic BiologyOkazaki 444-8585Japan

The dynamic behavior of organelles is essential for plant survival under various environmental conditions. Plant organelles, with various functions,migrate along actin filaments and contact other types of organelles, leading to physical interactions at a specific site called the membrane contact site. Recent studies have revealed the importance of physical interactions in maintaining efficient metabolite flow between *** this review, we first summarize peroxisome function under different environmental conditions and growth stages to understand organelle interactions. We then discuss current knowledge regarding the interactions between peroxisome and other organelles, i.e., the oil bodies, chloroplast, and mitochondria from the perspective of metabolic and physiological regulation, with reference to various organelle interactions and techniques for estimating organelle interactions occurring in plant cells.

关键词： physical interaction plant peroxisomes live-cell

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Experimental Studies on Debris Flow with Logs Focusing on Specific Weight Difference of Log Species

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Journal of Mountain Science 2013年第2期10卷 315-325页

作者： Haruki WATABE Takahiro ITOH Kazuhiko KAITSUKA Shigeki nishimura Nippon Koei Co. Ltd.2304InariharaTsukubaIbaraki 300-1259Japan

There are many experimental approaches,field investigations and numerical calculations for movements of woods in a clear water and debris ***,kinematic conditions for accumulated logs and the interactions between a main flow and logs have not been fully *** for woods need taking into account the characteristics of tree species such as conifer and broad-leaf trees and of shapes such as root swells and *** the present study,we focus on the differences in specific weight of conifer and broad-leaf trees with some moisture in a sediment-water mixture flow with narrow flow width,and consider that conifer and broad-leaf tree are floating and submerged solid phase,*** tests are conducted in steady flow of clear and debris flow over a rigid bed in order to evaluate conifer and broad-leaf tree movement in clear water and debris *** data indicates that dimensionless transverse diffusion coefficient can be 0.1 to 0.4 and 0.3 to 0.9 in flow *** diffusive characteristics seem to be independent of Reynolds number and Froude number,but dependent of bed slope,i.e.,gravity,though detailed considerations are needed to discuss about flow characteristics such as spatial eddy structures,momentum transfer induced by interactions of logs and so on.

关键词： Debris flow Driftwood Specificweight Log Flume test

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Three-dimensional transient simulation of CO_(2) laser tissue vaporization and experimental evaluation with a hydrogel phantom

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Journal of Innovative Optical Health Sciences 2022年第3期15卷 1-9页

作者： Kazuma Sudo Yu Shimojo Takahiro nishimura Kunio Awazu Graduate School of Engineering Osaka University Yamadaoka 2-1SuitaOsaka 565-0871Japan Japan Society for the Promotion of Science Kojimachi 5-3-1ChiyodaTokyo 102-0083Japan Global Center for Medical Engineering and Informatics Yamadaoka 2-2 SuitaOsaka 565-0871Japan

A quantitative analysis method of CO_(2) laser treatments promotes laser treatment performance and rapid clinical application of novel treatment *** in silico clinical trial approach,which is based on computational simulation of light-tissue interactions using the mathematical model,can provide quantitative *** several simulation methods of laser tissue vaporization with CO_(2) laser treatments have been proposed,validations of the CO_(2) laser wavelength have been *** this study,we demonstrated a tissue vaporization simulation using a CO_(2) laser and performed the experimental validation using a hydrogel phantom with constant physical parameters to evaluate the simulation accuracy of the vaporization *** laser tissue vaporization simulation consists of the calculation of light transport,photothermal conversion,thermal diffusion,and phase change in the *** vaporization width,depth,and area with CO_(2) laser irradiation to a tissue model were *** simulated results differed from the actual vaporization width and depth by approximately 20%and 30%,respectively,because of the solubilization of the hydrogel ***,the simulation vaporization area for all light irradiation parameters,which is related to the vaporization amount,agreed well with the actual vaporization *** results suggest that the computational simulation can be used to evaluate the amount of tissue vaporization in the safety and effectiveness analysis of CO_(2) laser treatments.

关键词： Laser tissue vaporization in silico clinical trial hydrogel phantom CO_(2)laser

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高温高压合成掺杂金刚石研究进展

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人工晶体学报 2024年第2期53卷 194-209页

作者：郝敬林邓丽芬王凯悦宋惠江南西村一仁太原科技大学材料科学与工程学院太原030024 中国科学院宁波材料技术与工程研究所海洋材料及相关技术重点实验室浙江省海洋材料与防护技术重点实验室宁波315201

金刚石具有超高热导率、宽禁带等优点,通过掺杂引入电子和空穴等缺陷,提升载流子浓度,可以使金刚石具有适合半导体应用的电导率,被称为第三代终极宽禁带半导体材料。本文首先介绍了金刚石单晶的高温高压合成方法,接着系统综述了基于高... 详细信息

金刚石具有超高热导率、宽禁带等优点,通过掺杂引入电子和空穴等缺陷,提升载流子浓度,可以使金刚石具有适合半导体应用的电导率,被称为第三代终极宽禁带半导体材料。本文首先介绍了金刚石单晶的高温高压合成方法,接着系统综述了基于高温高压法的金刚石掺杂研究现状和发展,然后分析了N、B、P和S等单元素掺杂及多元素共掺杂对金刚石晶体生长和电学性能的影响,并且对第一性原理计算研究金刚石掺杂进行了分析总结。高温高压退火可以有效改变金刚石中掺杂元素与空位等缺陷组合和分布状态,本文明晰了金刚石中含氮色心形成的原因及高温高压退火对色心的调控机制。最后对金刚石掺杂以及掺杂后金刚石的光学性能和电学性能研究前景进行了展望,指出可进一步探索多元素共掺杂的理论与实验方法,对提升掺杂金刚石性能具有重要意义。

关键词：金刚石高温高压掺杂含氮色心退火第一性原理计算

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