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The Impact of Different Support Vectors on GOSAT-2 CAI-2 L2 Cloud Discrimination

Yu Oishi, Haruma Ishida, Takashi Nakajima, Ryosuke Nakamura, Tsuneo Matsunaga
2017 Remote Sensing  
Greenhouse gases Observing SATellite-2 (GOSAT-2) will be launched in fiscal year 2018. GOSAT-2 will be equipped with two sensors: the Thermal and Near-infrared Sensor for Carbon Observation (TANSO)-Fourier Transform Spectrometer 2 (FTS-2) and the TANSO-Cloud and Aerosol Imager 2 (CAI-2). CAI-2 is a push-broom imaging sensor that has forward-and backward-looking bands to observe the optical properties of aerosols and clouds and to monitor the status of urban air pollution and transboundary air
more » ... llution over oceans, such as PM2.5 (particles less than 2.5 micrometers in diameter). CAI-2 has important applications for cloud discrimination in each direction. The Cloud and Aerosol Unbiased Decision Intellectual Algorithm (CLAUDIA1), which applies sequential threshold tests to features is used for GOSAT CAI L2 cloud flag processing. If CLAUDIA1 is used with CAI-2, it is necessary to optimize the thresholds in accordance with CAI-2. However, CLAUDIA3 with support vector machines (SVM), a supervised pattern recognition method, was developed, and then we applied CLAUDIA3 for GOSAT-2 CAI-2 L2 cloud discrimination processing. Thus, CLAUDIA3 can automatically find the optimized boundary between clear and cloudy areas. Improvements in CLAUDIA3 using CAI (CLAUDIA3-CAI) continue to be made. In this study, we examined the impact of various support vectors (SV) on GOSAT-2 CAI-2 L2 cloud discrimination by analyzing (1) the impact of the choice of different time periods for the training data and (2) the impact of different generation procedures for SV on the cloud discrimination efficiency. To generate SV for CLAUDIA3-CAI from MODIS data, there are two times at which features are extracted, corresponding to CAI bands. One procedure is equivalent to generating SV using CAI data. Another procedure generates SV for MODIS cloud discrimination at the beginning, and then extracts decision function, thresholds, and SV corresponding to CAI bands. Our results indicated the following. (1) For the period from November to May, it is more effective to use SV generated from training data from February while for the period from June to October it is more effective to use training data from August; (2) In the preparation of SV, features obtained using MODIS bands are more effective than those obtained using the corresponding GOSAT CAI bands to automatically extract cloud training samples.
doi:10.3390/rs9121236 fatcat:zdgqkkrsg5dbbackdgobqn4ymq

A Finite-Volume Solution with a Bidirectional Upwind Difference Scheme for the Three-Dimensional Radiative Transfer Equation

Haruma Ishida, Shoji Asano
2007 Journal of the Atmospheric Sciences  
4098 JOURNAL OF THEI ATMOSPHERIC SCIENCES VOLUME 64 A Finite-Volume Solution with a Bidirectional Upwind Difference Scheme for the Three-Dimensional Radiative Transfer Equation HARUMA ISHIDA AND SHOJI  ...  Ishida and Asano (2007) used a similar method but used a scaling func- tion expansion for the discretization.  ... 
doi:10.1175/2007jas2312.1 fatcat:xg67ekvhzbbdvcmhb6ya4fob5e

Direct Surgery for Brainstem Cavernous Malformations
脳幹部海綿状血管腫に対する直達手術9例の検討

Kazuhiko KUROZUMI, Shigeki ONO, Tomotsugu ICHIKAWA, Yasuyuki MIYOSHI, Joji ISHIDA, Jun HARUMA, Koji TOKUNAGA, Isao DATE
2013 Surgery for Cerebral Stroke  
We reviewed nine (consecutive) cases of brainstem cavernous malformations surgically treated in Okayama University Hospital between 1994 and 2011, and evaluated the surgical approach used for each lesion, its accessibility, and the pre-and post-operative neurological statuses. All cases that were referred for surgery had a pre-surgical history of progressive or persistent neurological deficits caused by repeated episodes of hemorrhage. Of our nine cases, four of the cavernous malformations were
more » ... dorsal lesions, three were lateral, and two were ventral. The dorsal lesions were treated using a trans 4th ventricular approach, the lateral lesions were treated using a retrosigmoid approach, and the ventral lesions were treated using an anterior petrosal approach in one patent and a presigmoid approach in the other. Total removal was carried out in seven patients, partial removal in one, and cauterization in one patient. Longterm follow-ups (mean: 78.2 months) showed no recurrent hemorrhages, and the mean modified Rankin Stroke Scale was 1.7. These findings indicate that direct surgery for brain stem cavernous malformation can be successfully performed by appropriate selection of surgical approaches under careful monitoring. The brainstem cavernous malformations require a skull-base approach and additional techniques based on considerations of local anatomy and surrounding structures.
doi:10.2335/scs.41.213 fatcat:kkuqybdhkbfpjagqe4hpzusrdi

Preliminary verification for application of a support vector machine-based cloud detection method to GOSAT-2 CAI-2

Yu Oishi, Haruma Ishida, Takashi Y. Nakajima, Ryosuke Nakamura, Tsuneo Matsunaga
2018 Atmospheric Measurement Techniques  
Yu Oishi, Haruma Ishida, Takashi Y.  ...  Nakajima, Ryosuke Nakamura, and Tsuneo Matsunaga conceived and designed the studies; Yu Oishi performed evaluations and analyzed the data; Haruma Ishida contributed analysis tools; Yu Oishi wrote the paper  ... 
doi:10.5194/amt-11-2863-2018 fatcat:4f7f2rieabfwhjxrlh5juxqzee

Preliminary verification for application of a support vector machine based cloud detection method to GOSAT-2 CAI-2

Yu Oishi, Haruma Ishida, Takashi Y. Nakajima, Ryosuke Nakamura, Tsuneo Matsunaga
2018 Atmospheric Measurement Techniques Discussions  
Yu Oishi, Haruma Ishida, Takashi Y.  ...  Nakajima, Ryosuke Nakamura, and Tsuneo Matsunaga conceived and designed the studies; Yu Oishi performed evaluations and analyzed the data; Haruma Ishida contributed analysis tools; Yu Oishi wrote the paper  ... 
doi:10.5194/amt-2017-464 fatcat:ega3okmkzvdkbg4vvqx4bp364y

Theoretical basis of the algorithms and early phase results of the GCOM-C (Shikisai) SGLI cloud products

Takashi Y. Nakajima, Haruma Ishida, Takashi M. Nagao, Masahiro Hori, Husi Letu, Riko Higuchi, Naoya Tamaru, Naritoshi Imoto, Akihiro Yamazaki
2019 Progress in Earth and Planetary Science  
To achieve neutral cloud/clear discrimination, Ishida and Nakajima (2009) introduced the CCL and categorization by threshold tests.  ...  An algorithm developed by Ishida and Nakajima (2009) for neutral cloudy/clear discrimination leads to unbiased results and is used in the SGLI.  ... 
doi:10.1186/s40645-019-0295-9 fatcat:ayc3hszwfjghne7wezlc63rj5i

Optimal use of the Prede POM sky radiometer for aerosol, water vapor, and ozone retrievals

Rei Kudo, Henri Diémoz, Victor Estellés, Monica Campanelli, Masahiro Momoi, Franco Marenco, Claire L. Ryder, Osamu Ijima, Akihiro Uchiyama, Kouichi Nakashima, Akihiro Yamazaki, Ryoji Nagasawa (+2 others)
2021 Atmospheric Measurement Techniques  
Abstract. The Prede POM sky radiometer is a filter radiometer deployed worldwide in the SKYNET international network. A new method, called Skyrad pack MRI version 2 (MRI v2), is presented here to retrieve aerosol properties (size distribution, real and imaginary parts of the refractive index, single-scattering albedo, asymmetry factor, lidar ratio, and linear depolarization ratio), water vapor, and ozone column concentrations from the sky radiometer measurements. MRI v2 overcomes two
more » ... of previous methods (Skyrad pack versions 4.2 and 5, MRI version 1). One is the use of all the wavelengths of 315, 340, 380, 400, 500, 675, 870, 940, 1020, 1627, and 2200 nm if available from the sky radiometers, for example, in POM-02 models. The previous methods cannot use the wavelengths of 315, 940, 1627, and 2200 nm. This enables us to provide improved estimates of the aerosol optical properties, covering almost all the wavelengths of solar radiation. The other is the use of measurements in the principal plane geometry in addition to the solar almucantar plane geometry that is used in the previous versions. Measurements in the principal plane are regularly performed; however, they are currently not exploited despite being useful in the case of small solar zenith angles when the scattering angle distribution for almucantars becomes too small to yield useful information. Moreover, in the inversion algorithm, MRI v2 optimizes the smoothness constraints of the spectral dependencies of the refractive index and size distribution, and it changes the contribution of the diffuse radiances to the cost function according to the aerosol optical depth. This overcomes issues with the estimation of the size distribution and single-scattering albedo in the Skyrad pack version 4.2. The scattering model used here allows for non-spherical particles, improving results for mineral dust and permitting evaluation of the depolarization ratio. An assessment of the retrieval uncertainties using synthetic measurements shows that the best performance is obtained when the aerosol optical depth is larger than 0.2 at 500 nm. Improvements over the Skyrad pack versions 4.2 and 5 are obtained for the retrieved size distribution, imaginary part of the refractive index, single-scattering albedo, and lidar ratio at Tsukuba, Japan, while yielding comparable retrievals of the aerosol optical depth, real part of the refractive index, and asymmetry factor. A radiative closure study using surface solar irradiances from the Baseline Surface Radiation Network and the parameters retrieved from MRI v2 showed consistency, with a positive bias of the simulated global irradiance of about +1 %. Furthermore, the MRI v2 retrievals of the refractive index, single-scattering albedo, asymmetry factor, and size distribution have been found to be in agreement with integrated profiles of aircraft in situ measurements of two Saharan dust events at the Cape Verde archipelago during the Sunphotometer Airborne Validation Experiment in Dust (SAVEX-D) 2015 field campaign.
doi:10.5194/amt-14-3395-2021 fatcat:gx7idazp3rhj3hmiu33azfdove

A cace of ulcerative colitis with multiple colon cancers
潰瘍性大腸炎に合併した多発大腸癌の1例

Shinji TANAKA, Takahumi DOHZONO, Noriyuki ISHIDA, Manabu IMADA, Yoshihiko TAKEHARA, Sumie HASHIBA, Koji HIRAAKI, Takashi KATOH, Ken HARUMA, Kenji TOKUMO, Koji SUMII, Goro KAJIYAMA (+2 others)
1989 Nippon Shokakibyo Gakkai Zasshi  
胃 と 腸 of ulcerative colitis with multiple colon cancers Shinji TANAKA, Takahumi DOHZONO, Noriyuki ISHIDA, Manabu IMADA, Yoshihiko TAKEHARA, Sumie HASHIBA, Koji HIRAAKI, Takashi KATOH, Ken HARUMA, Kenji  ... 
doi:10.11405/nisshoshi1964.86.931 fatcat:4o7lmxdgrzfnbjyi7k5s6j2vaa

Zn tolerance in the evergreen shrub, Aucuba japonica, naturally growing at a mine site: Cell wall immobilization, aucubin production, and Zn adsorption on fungal mycelia

Kohei Doyama, Keiko Yamaji, Toshikatsu Haruma, Atsushi Ishida, Shigeta Mori, Yoko Kurosawa, Umakanta Sarker
2021 PLoS ONE  
Aucuba japonica Thunb. is an evergreen understory shrub that grows naturally at a mine site. The mine soil contains high concentrations of heavy metals, and A. japonica appears to maintain detoxification mechanisms against heavy metals in the study site's understory. This study aimed to investigate the heavy metal tolerance mechanisms in A. japonica, considering the possible roles of arbuscular mycorrhizal and root-endophytic fungi. We conducted fieldwork in summer (canopy-foliation season) and
more » ... winter (canopy-defoliation season) to measure the heavy metal concentrations in leaves, branches, and roots and analyze possible detoxicants in the roots. The infection rates of arbuscular mycorrhizal and root-endophytic fungi were evaluated via microscopic observation, and heavy metal (Zn) localization in A. japonica roots was observed using confocal laser scanning microscopy. Field analysis showed that A. japonica accumulated excessive Zn and produced aucubin and citric acid in the roots in both summer and winter. Zn localization observations clarified that Zn was distributed in thickened epidermal and cortical cell walls, suggesting that the cell walls functioned as Zn deposition sites, reducing Zn toxicity. It was further clarified that Zn was contained within cortical cells, indicating that Zn might be detoxified by aucubin and citric acid. Arbuscular mycorrhizal and root-endophytic fungi within cortical cells adsorbed Zn on fungal cell walls, indicating that these fungi would reduce Zn content within root cells and might alleviate Zn toxicity. Our results indicated that A. japonica would maintain Zn tolerance in both summer and winter via Zn immobilization in the cell walls and production of aucubin and citric acid, and that arbuscular mycorrhizal and root-endophytic fungi might play important roles in the Zn tolerance of A. japonica.
doi:10.1371/journal.pone.0257690 pmid:34591865 pmcid:PMC8483361 fatcat:gtzegkfzxfcofblzv6x6toxttq

Investigation of Low-Cloud Characteristics Using Mesoscale Numerical Model Data for Improvement of Fog-Detection Performance by Satellite Remote Sensing

Haruma Ishida, Kentaro Miura, Teruaki Matsuda, Kakuji Ogawara, Azumi Goto, Kuniaki Matsuura, Yoshiko Sato, Takashi Y. Nakajima
2014 Journal of Applied Meteorology and Climatology  
Low-cloud detection We employ an algorithm of Ishida et al. (2014) for detection of low water cloud with MTSAT-2.  ...  This water low-cloud detection algorithm finally yields a clear confidence level (CCL), which represents the certainty of the clear-sky/cloud discrimination (Ishida and Nakajima 2009 ).  ... 
doi:10.1175/jamc-d-13-0363.1 fatcat:hpzfzr2s5fbhhcbrjlcyckm34y

Assessment of the potential impact of a hyperspectral infrared sounder on the Himawari follow-on geostationary satellite

Kozo Okamoto, Hiromi Owada, Tadashi Fujita, Masahiro Kazumori, Michiko Otsuka, Hiromu Seko, Yoshifumi Ota, Naotaka Uekiyo, Hiroshi Ishimoto, Masahiro Hayashi, Haruma Ishida, Akiyoshi Ando (+3 others)
2020 SOLA : Scientific Online Letters on the Atmosphere  
doi:10.2151/sola.2020-028 fatcat:v72zlguglzg7va4aor7ftl2zi4

TAS4464, a NEDD8-activating enzyme inhibitor, activates both intrinsic and extrinsic apoptotic pathways via c-Myc-mediated regulation in acute myeloid leukemia

Hiroaki Ochiiwa, Guzhanuer Ailiken, Masataka Yokoyama, Kazuyuki Yamagata, Hidekazu Nagano, Chihoko Yoshimura, Hiromi Muraoka, Keiji Ishida, Tomonori Haruma, Akitoshi Nakayama, Naoko Hashimoto, Kazutaka Murata (+5 others)
2021 Oncogene  
AbstractTAS4464, a potent, selective small molecule NEDD8-activating enzyme (NAE) inhibitor, leads to inactivation of cullin-RING E3 ubiquitin ligases (CRLs) and consequent accumulations of its substrate proteins. Here, we investigated the antitumor properties and action mechanism of TAS4464 in acute myeloid leukemia (AML). TAS4464 induced apoptotic cell death in various AML cell lines. TAS4464 treatments resulted in the activation of both the caspase-9-mediated intrinsic apoptotic pathway and
more » ... aspase-8-mediated extrinsic apoptotic pathway in AML cells; combined treatment with inhibitors of these caspases markedly diminished TAS4464-induced apoptosis. In each apoptotic pathway, TAS4464 induced the mRNA transcription of the intrinsic proapoptotic factor NOXA and decreased that of the extrinsic antiapoptotic factor c-FLIP. RNA-sequencing analysis showed that the signaling pathway of the CRL substrate c-Myc was enriched after TAS4464 treatment. Chromatin immunoprecipitation (ChIP) assay revealed that TAS4464-induced c-Myc bound to the PMAIP1 (encoding NOXA) and CFLAR (encoding c-FLIP) promoter regions, and siRNA-mediated c-Myc knockdown neutralized both TAS4464-mediated NOXA induction and c-FLIP downregulation. TAS4464 activated both caspase-8 and caspase-9 along with an increase in NOXA and a decrease in c-FLIP, resulting in complete tumor remission in a human AML xenograft model. These findings suggest that NAE inhibition leads to anti-AML activity via a novel c-Myc-dependent apoptosis induction mechanism.
doi:10.1038/s41388-020-01586-4 pmid:33420360 fatcat:a2fdaoql7rhenbafnpkga5vohq

雲混入GOSAT-2 FTS-2データの除去のためのCAI-2雲識別の利用法に関する検討
Preliminary Study of a Method Using the GOSAT-2 CAI-2 Cloud Discrimination for Screening of Cloud-contaminated FTS-2 Data

Yu OISHI, Takashi M. NAGAO, Haruma ISHIDA, Takashi Y. NAKAJIMA, Tsuneo MATSUNAGA
2015 Journal of The Remote Sensing Society of Japan  
The preparation of the launching of Greenhouse gases Observing SATellite-2 (GOSAT-2) in fiscal 2017 has been progressing. GOSAT-2 will be equipped with two earth-observing instruments: the Thermal And Near-infrared Sensor for carbon Observation Fourier Transform Spectrometer 2 (TANSO-FTS-2), and the Cloud and Aerosol Imager 2 (TANSO-CAI-2). Cloud contamination within the instantaneous field-of-view (IFOV) of the FTS-2 leads to incorrect estimates of major greenhouse gases concentration. Thus,
more » ... oud-contaminated FTS-2 data will be identified and rejected using the CAI-2. The observed time difference between the FTS-2 and CAI-2 may be longer than the FTS and CAI because the CAI-2 is a push-broom imaging sensor which has the backward and forward looking bands. Consequently, we examined the probability of cloud contamination within the IFOV of the FTS-2 by moving cloud though it was cloud-free region when the CAI-2 observed there. And we propose a method using the CAI-2 cloud discrimination for screening of cloudcontaminated FTS-2 data.
doi:10.11440/rssj.35.299 fatcat:usi4nrfyirfilfsjkpj6gmws7m

GOSAT-2 CAI-2 L2 Cloud Discrimination Product
GOSAT-2 CAI-2 L2雲識別プロダクト

Yu OISHI, Haruma ISHIDA, Takashi Y. NAKAJIMA
Journal of The Remote Sensing Society of Japan  
The Greenhouse gases Observing SATellite-2 (GOSAT-2) was launched on 29 October, 2018. GOSAT-2 is equipped with two earth-observing instruments: the Thermal And Near-infrared Sensor for carbon Observation Fourier Transform Spectrometer 2 (TANSO-FTS-2), and the Cloud and Aerosol Imager 2 (TANSO-CAI-2). Cloud contamination within the instantaneous field-of-view (IFOV) of the FTS-2 leads to incorrect estimates of major greenhouse gases concentration. To solve this problem, the FTS-2 data suspected
more » ... to have cloud contamination must be identified by a new cloud discrimination algorithm using a support vector machine, the Cloud and Aerosol Unbiased Decision Intellectual Algorithm-3 (CLAUDIA3), used with the CAI-2. The cloud discrimination results will be publicly available as the CAI-2 L2 cloud discrimination products. In this paper, we deal with the CLAUDIA3 and the application of the CLAUDIA3 to CAI-2 data. Moreover, we show several cloud discrimination results of CLAUDIA3 applied to CAI data.
doi:10.11440/rssj.39.43 fatcat:gegssy5wxfgt7cbnofmc76cdae

Page 239 of Cancer Science Vol. 94, Issue 3 [page]

2003 Cancer Science  
Sugiyama A, Maruta F, Ikeno T, Ishida K, Kawasaki S, Katsuyama T, Shimizu N, Tatematsu M.  ...  Maruta F, Sugiyama A, Ishida K, [keno T, Murakami M, Kawasaki S, Ota H, Tatematsu M, Katsuyama T.  ... 
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