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Ecohydrological land reanalysis [article]

Yohei Sawada, Hiroyuki Tsutsui, Hideyuki Fujii, Toshio Koike
2021 arXiv   pre-print
The accurate estimation of terrestrial water and vegetation is a grand challenge in hydrometeorology. Many previous studies developed land data assimilation systems (LDASs) and provided global-scale land surface datasets by integrating numerical simulation and satellite data. However, vegetation dynamics has not been explicitly solved in these land reanalysis datasets. Here we present the newly developed land reanalysis dataset, ECoHydrological Land reAnalysis (ECHLA). ECHLA is generated by
more » ... entially assimilating C- and X- band microwave brightness temperature satellite observations into a land surface model which can explicitly simulate the dynamic evolution of vegetation biomass. The ECHLA dataset provides semi-global soil moisture from surface to 1.95m depth, Leaf Area Index (LAI), and vegetation water content and is available from 2003 to 2010 and from 2013 to 2019. We assess the performance of ECHLA to estimate soil moisture and vegetation dynamics by comparing the ECHLA dataset with independent satellite and in-situ observation data. We found that our sequential update by data assimilation substantially improves the skill to reproduce the seasonal cycle of vegetation. Data assimilation also contributes to improving the skill to simulate soil moisture mainly in the shallow soil layers (0-0.15m depth). The ECHLA dataset will be publicly available and expected to contribute to understanding terrestrial ecohydrological cycles and water-related natural disasters such as drought.
arXiv:2107.07646v1 fatcat:mchbl74qyvhv5l4mhqh6l4xuwu


Setsuro FUJII, Akifumi YUASA, Takashi KAWACHI, Yutaka OKAMURA, Hideyuki WAKASUGI, Yuichi YAMAMURA
1964 GANN  
Synopsis A basic protein fraction having toxohormone activities, isolated from Rhodamine sarcoma, was subjected to carboxymethylcellulose column chromatography. The fractions of effluent were analyzed by copper-Folin reaction and each peak was tested for toxohormone activity such as depressing effect on plasma iron, liver catalase, and tryptophan pyrrolase. Under these experimental conditions, the high activity of depressing plasma iron and smaller catalase, and tryptophan pyrrolase-depressing
more » ... ctivities were found in the fast-moving fractions separated from the fraction which combined strongly with cellulose and had these three kinds of toxohormone activity. From this result, there is the possibility that the plasma iron-depressing factor is associated with different chemical entities from other toxohormone factors of the basic protein.
doi:10.20772/cancersci1959.55.1_67 fatcat:dhrrp6wxd5bxbef2h5ftpatamu

A Study on Growth Changes in the Pharyngeal Airway

Satoshi Fujii, Hideyuki Kato, Mayumi Fujii, Fumiko Kato, Takeshi Saito, Hiroshi Yamada, Morito Akasaka
1991 Shoni shikagaku zasshi. The Japanese journal of pedodontics  
Satoshi Fujii, Hideyuki Kato, Mayumi Fujii, Fumiko Kato, Takeshi Saito, Hiroshi Yamada and Morito Akasaka Nihon University School of Dentistry Department of Pedodontics (Director : Prof.  ... 
doi:10.11411/jspd1963.29.4_777 fatcat:ajvgfq2bvzgyhpazg6dohckcr4

Evaluation of 11 Dacryocystorhinostomies

Hideyuki Saito, Taku Yamashita, Ryouichi Fujii, Noboru Habu, Kaoru Ogawa
2006 Practica Oto-Rhino-Laryngologica  
doi:10.5631/jibirin.99.211 fatcat:cjzoozudcndrvpgxuuerrksaaq

Evidence for the hook supercoiling mechanism of the bacterial flagellum

Takashi Fujii, Hideyuki Matsunami, Yumi Inoue, Keiichi Namba
2018 Biophysics and Physicobiology  
The bacterial flagellar hook is a short, highly curved tubular structure connecting the basal body as a rotary motor and the filament as a helical propeller to function as a universal joint to transmit motor torque to the filament regardless of its orientation. This highly curved form is known to be part of a supercoil as observed in the polyhook structure. The subunit packing interactions in the Salmonella hook structure solved in the straight form gave clear insights into the mechanisms of
more » ... bending flexibility and twisting rigidity. Salmonella FlgE consists of four domains, D0, Dc, D1 and D2, arranged from inside to outside of the tube, and an atomic model of the supercoiled hook built to simulate the hook shape observed in the native flagellum suggested that the supercoiled form is stabilized by near-axial interactions of the D2 domains on the inner surface of the supercoil. Here we show that the deletion of domain D2 from FlgE makes the hook straight, providing evidence to support the proposed hook supercoiling mechanism that it is the nearaxial interactions between the D2 domains that stabilize the highly curved hook structure. Many bacteria swim in liquid environments by rotating the flagella. The bacterial flagellum can be roughly divided into the following three parts: the basal body acting as a rotary motor, the hook as a universal joint and the filament as a helical propeller. In Escherichia coli and Salmonella enterica (hereafter referred to as Salmonella), the filament is in a left-handed supercoiled form to act as a helical propeller, and the flagellar motor rotates in the counterclockwise direction to produce thrust for forward swimming. E. coli and Salmonella cells have several flagella, and they form a bundle behind the cell body to amplify the thrust and push the cell forward. But when a quick reversal of motor rotation occurs every few seconds to the clockwise direction, this produces a twisting force in the base region of the filament and transforms its left-handed supercoiled form to a righthanded one. Then, the flagellar bundle falls apart to make the cell tumble and change its swimming direction [1] . During this dynamic process, the hook plays an essential role as a universal joint with high rigidity against twisting and flexibility in bending. The flagellar motor has a drive shaft called the rod, which extends on the rotor ring called the MS ring that spans the cytoplasmic membrane. The rod is composed of four rod proteins, FlgB, FlgC, FlgF and FlgG, and the LP ring surrounds the distal part of the rod made of FlgG as a bushing to support high-speed rotation of the motor. The proximal The bacterial flagellar hook is a short, highly curved tubular structure connecting the flagellar motor with the helical filament acting as a propeller to function as a universal joint to transmit motor torque to the filament regardless of its orientation. The highly curved form is part of a supercoil as observed in the polyhook structure. The essential role of the outermost domain D2 of the hook protein in the supercoiling mechanism is revealed by its deletion that made the polyhook straight.
doi:10.2142/biophysico.15.0_28 pmid:29607277 pmcid:PMC5873038 fatcat:eciwat3uazdqfjlym4uhai2mty

Nanometer scale marker for fluorescent microscopy

Takashi Hiraga, Yoshinori Iketaki, Takeshi Watanabe, Hideyuki Ohyi, Kazumasa Kobayashi, Noritaka Yamamoto, Toshiko Mizokuro, Masaaki Fujii
2005 Review of Scientific Instruments  
To establish a calibration method of optical performance in fluorescence microscopy, we fabricated a fluorescent nanometer-scale marker by combining a dry dye method for polymer film and fine lithography. The marker has a 50 nm line-and-space fluorescent pattern, finer than the optical diffraction limit. A spin-coated poly͑methyl methacrylate͒ thin film on a silicon wafer was densely doped with Rhodamine 6G using a simple vacuum process, named the vapor-transportation method, and then the
more » ... n was formed on the film using electron-beam lithography. The figure accuracy of the fabricated marker was calibrated by electron microscopes. Using this marker, one can quantitatively evaluate the optical properties; i.e., the contrast-transfer function, the point-spread function, magnification, and so on. To show practical use of the marker, we demonstrated the evaluation of a fluorescent microscope system.
doi:10.1063/1.1946627 fatcat:wrt2xznhcneyfifcnm7v2mum5e


Tobias GRAF, Toshio KOIKE, Hideyuki FUJII
The present paper introduces the first steps done towards the development of a land data assimilation system for snow, based on the assimilation of passive microwave brightness temperature (TB) observation. It introduces the coupling of a land surface model (JMA-SiB) used by the Japanese Meteorological Agency (JMA) and a radiative transfer model for snow. In a first step JMA-SiB was extended to consider the change of the snow grain during the winter season, which have a significant impact on
more » ... TB observation and the radiative transfer in snow. The model results indicate, that the new version is capable to predict the snow grain size. Furthermore a first version of the coupled system was applied to data observed during the Cold Land Processes Field Experiment (CLPX) in Boulder Colorado (2003) , to assimilate the TB change at 89 GHz after snowfall events and the results are in agreement with the observed change of the snow water equivalent at the site.
doi:10.2208/prohe.50.1 fatcat:p2em7kelbfcmzmk3ufdzsguaqy

Auxin-mediated response of cucumber seedlings to gravity

Nobuharu Fujii, Hideyuki Takahashi
2003 Biological Sciences in Space  
Fujii, N., Kamada, M., Yamasaki, S. and T. Hideyuki. (2000) Differential accumulation of Aux/IAA mRNA during seedling development and gravity response in cucumber (Cucumis sativus L.) Plant Mol.  ...  Saito, Y., Kamada, M., Fujii, N. and Takahashi, H. (2003) Auxin action in gravimorphogenesis of cucumber seedlings. Space Utilization Research, 19, 94-97. Sessions, A., Nemhauser, J.  ...  Auxin-mediated response of cucumber seedlings to gravity Nobuharu Fujii, Hideyuki Takahashi Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan Abstract  ... 
doi:10.2187/bss.17.126 fatcat:ccjfpd2ipra7ndc4rj4kp265ue

Apparent Double SiO Maser Sources

Shuji Deguchi, Takahiro Fujii, Hideyuki Izumiura, Shigeru Matsumoto, Yoshikazu Nakada, Peter R. Wood, Issei Yamamura
1999 Nippon Tenmon Gakkai obun kenkyu hokoku  
During the course of a SiO maser survey of galactic disk IRAS sources at 43 GHz, we found two cases of doubly peaked SiO maser sources in the 40" half-power beam of the Nobeyama 45-m telescope. The double peaks in the spectra of these sources (IRAS 18019-1822 and 18465-0717) have velocity separations of 73 and 147 km s" 1 , indicating that each peak comes from a separate source. Infrared imaging observations found pairs of candidate counterparts for each source with angular separations of about
more » ... 20". Combining the observational data, we conclude that these objects are apparent-double SiO sources, which are by chance seen in the same direction. The discovery rate for pairs of SiO maser sources in a single telescope beam is found to be consistent with the surface density of SiO maser sources in the galactic disk. These sources can be used to measure the parallaxes and proper motions with VLBI in the future.
doi:10.1093/pasj/51.3.355 fatcat:3tbdmts3gnadtdmhj44on3lo2y

Lipid Components, Distribution and Function in Wheat Flour

1973 Nippon Nogeikagaku-kaishi  
doi:10.1271/nogeikagaku1924.47.407 fatcat:bq22mhbyjfhgljzihwzxiukpke

Reality jockey

Kevin Fan, Hideyuki Izumi, Yuta Sugiura, Kouta Minamizawa, Sohei Wakisaka, Masahiko Inami, Naotaka Fujii, Susumu Tachi
2013 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems - CHI '13  
We present Reality Jockey, a system that confuses the participant's perception of the reality by mixing in a recorded past-reality. The participant will be immersed in a spatialized 3D sound environment that is a mix of sounds from the reality and from the past. The sound environment from the past is augmented with haptic feedback in crossmodality. The haptic feedback is associated with certain sounds such as the vibration in the table when stuff is placed on the table to make the illusion of
more » ... happening in live. The seamless transition between live and past creates immersive experience of past events. The blending of live and past allows interactivity. To validate our system, we conducted user studies on 1) does blending live sensations improve such experiences, and 2) how beneficial is it to provide haptic feedbacks in recorded pasts. Potential applications are suggested to illustrate the significance of Reality Jockey. Figure 1. The participant perceives the experimenter from the past is the actual reality as she talks with the experimenter.
doi:10.1145/2470654.2481353 dblp:conf/chi/FanISMWIFT13 fatcat:7zlateqbozavvatv74qscxryga

Estimation and Validation of Soil Moisture Using PALSAR Onboard ALOS over Mongolian Plateau

Takeo Tadono, Masanobu Shimada, Hideyuki Fujii, Ichirow Kaihotsu
2008 PIERS Online  
Soil moisture is important for fields not only hydrology but also meteorology. It plays important roles in the interactions between the land surface and the atmosphere, as well as in the partitioning of precipitation into runoff and ground water storage. In spite of its importance, soil moisture is not generally used for weather forecasting and water resources management because it is difficult to measure on a routine basis over large areas. The objective of this study is to develop algorithms
more » ... o estimate spatial and temporal distributions of soil moisture using satellite remote sensing techniques. The Advanced Land Observing Satellite (ALOS, nicknamed "Daichi") was successfully launched on January 24, 2006 from Tanegashima Space Center, Japan, and it is continuously working very well. ALOS has an L-band Synthetic Aperture Radar (SAR) called PALSAR. In this study, we applied existing algorithm to PALSAR data and generated surface soil moisture maps with 100 m spatial resolution. The test sites are located in the Mongolian Plateau, where is spatially homogeneous with basically flat terrain features, and three Automatic Weather Stations (AWSs) and twelve Automatic Stations for Soil Hydrology (ASSH) are installed.
doi:10.2529/piers080121020548 fatcat:r6fossiwvjdutjxfn2nf65ndbq

A Case Report of Adenomyoma of the Common Bile Duct

Kenichi MATSUZU, Yoshiro FUJII, Hirohito FUJIKAWA, Beni SAITO, Tsutomu HAYASHI, Keita FUJII, Yasuyuki KOJIMA, Kazutaka NARUI, Akio ASHIDA, Hideyuki IKE
2009 Nihon Gekakei Rengo Gakkaishi (Journal of Japanese College of Surgeons)  
doi:10.4030/jjcs.34.621 fatcat:mulqyuuyrve7laa3eov2fsip54

Differential Accumulation of CsARF5 Protein during Peg Formation in Cucumber Seedlings

Yuko Sasagawa-Saito, Daisuke Kitazawa, Yutaka Miyazawa, Nobuharu Fujii, Hideyuki Takahashi
2010 Biological Sciences in Space  
It has been shown that auxin and mRNA of auxin-inducible genes are asymmetrically distributed in the transition zone (Fujii et al., 2000; Kamada et al., 2000; Saito et al., 2005) .  ...  demonstrated that auxin and mRNA of auxin-inducible genes such as CsIAA1, CsIAA2 and CS-ACS1 accumulate more abundantly on the lower side than on the upper side of the gravistimulated transition zone (Fujii  ... 
doi:10.2187/bss.24.153 fatcat:3cphk6sulnbvjd2etylm5zncwy

Gender-Related Association of Serum Uric Acid and Left Ventricular Hypertrophy in Hypertension

Kiyoshi Matsumura, Toshio Ohtsubo, Hideyuki Oniki, Koji Fujii, Mitsuo Iida
2006 Circulation Journal  
everal epidemiological studies have shown that associations between increased serum uric acid and cardiovascular risk are present not only in the general population, but also in patients with hypertension, 1-4 although the underlying mechanisms for these associations are not well understood. 5 Left ventricular (LV) hypertrophy, which is likely to be involved in cardiovascular disease, 6 is the most common cardiac complication caused by hypertension; however, the role of serum uric acid on the
more » ... ogression of LV hypertrophy in inidviduals with hypertension has not been well characterized. 7 The individuals participating in the Losartan Intervention For Endpoint reduction in hypertension study had clinical characteristics of hypertension with electrocardiographic signs of LV hypertrophy, 8 and this study indicated that the association between serum uric acid and cardiovascular events was stronger in women than in men with or without adjustment of Framingham risk score. 9 In contrast, another study reported an association between serum uric acid and LV hypertrophy in men, but not in Japanese hypertensive individuals women. 10 The association of serum uric acid and LV hypertrophy might thus be dependent on sex, although previous studies have reported divergent results in this regard. 9,10 We anticipated that these divergent findings might be attributable to the difficulty of precisely assessing blood pressure in these indiviuals, because casual blood pressures are easily influenced by physical activities. Background The aim of the present study was to determine whether sex differences contribute to the association of serum uric acid and left ventricular hypertrophy in individuals with hypertension. Methods and Results Seventy participants with essential hypertension (34 men, 36 women; 54.4±1.6 years old) were enrolled to undergo echocardiography to calculate the left ventricular mass index (LVMI). Twenty-fourhour ambulatory blood pressure monitoring was done to assess blood pressure level precisely. The LVMI was significantly correlated with serum uric acid (r=0.295, p=0.013) in all participants. After controlling for factors such as age, sex, mean 24-h systolic blood pressure, creatinine clearance, and duration of hypertension, serum uric acid was still found to be significantly and independently associated with LVMI. Because serum uric acid was significantly higher in men than in women (6.8±0.3 and 5.1±0.2 mg/dl, respectively), subsequent analysis was performed by gender. Multiple regression analysis revealed that the LVMI was significantly and independently associated with serum uric acid in women, but not in men. Conclusions The potential effect of uric acid on LV hypertrophy is more pronounced in female than in males with essential hypertension. (Circ J 2006; 70: 885 -888) S 886 MATSUMURA K et al.
doi:10.1253/circj.70.885 pmid:16799243 fatcat:asnsfa7z2zd3pfnzu7waywbse4
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