Faculty Profiles - NAGAO, Masahiro

Papers - NAGAO, Masahiro

Division display 1 - 20 of about 95 ／ All the affair displays >>

Alternating Current Electrolysis for Individual Synthesis of Methanol and Ethane from Methane in a Thermo-electrochemical Cell Reviewed

Takashi Hibino, Kazuyo Kobayashi, Masahiro Nagao, Dongwen Zhou, Siyuan Chen, and Yuta Yamamoto

ACS Catalysis Vol. 13 page： 8890 - 8901 2023.6

Machine learning-based pH quantification from test strip images using multiple color spaces

Nakamura Y., Nagao M.

Chemistry Letters Vol. 54 ( 2 ) 2025.2

Language：English Publishing type：Research paper (scientific journal) Publisher：Chemistry Letters

Recent advances in colorimetric analysis have focused on improving measurement accuracy through the integration of smartphone cameras and machine learning. Particular focus has been placed on enhancing predictive accuracy by combining variables from multiple color spaces. In this study, we developed a model incorporating multiple color spaces using images of universal pH test strips. For model selection, we focused on localized errors and used the mean absolute error for each pH value as an evaluation metric. As a result, by emphasizing localized errors, we were able to build a model with better generalization performance than the model selected on the basis of overall error. We implemented this model in a real-time pH measurement demo web application.

DOI： 10.1093/chemle/upaf018

Scopus

Two-stage electrolysis of H2O and CO2 to methanol: CO2-to-methane reduction at the cathode and subsequent methane-to-methanol oxidation at the anode Reviewed

Hibino Takashi, Kobayashi Kazuyo, Nagao Masahiro, Dongwen Zhou, Siyuan Chen

JOURNAL OF MATERIALS CHEMISTRY A Vol. 10 ( 42 ) page： 22718 - 22729 2022.11

Estimation of Material Stocks Based on Building Structure Determination Using Image Recognition

NAGAO Masahiro, TAKEUCHI Junki, TAMASAKI Miyu, MORITA Masato, KITA Eisuke, SHIRAKAWA Hiroaki, TANIKAWA Hiroki

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) Vol. 78 ( 6 ) page： II_19 - II_25 2022

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

Estimation of material stock of buildings in urban areas is important for recycling and proper disposal of resources. For the purpose of more accurate stock estimation, glasses and walls were extracted from images of building walls using a machine learning model of image recognition, and then calculated the percentage of glass in the walls based on the number of pixels in each. The classification of building structures based on the glass percentage showed that a threshold value of 67% is suitable for classifying steel-framed buildings with curtain walls. Classification result obtained from 262 buildings around Nagoya Station was used for stock estimation, and the result was compared with those calculated by the method proposed by previous study. The estimated amount of concrete decreased by 18% and the estimated amount of steel increased by 325%.

DOI： 10.2208/jscejer.78.6_ii_19

CiNii Research

Ionic conductive and photocatalytic properties of cementitious materials: calcium silicate hydrate and calcium aluminoferrite International coauthorship

Nagao Masahiro, Kobayashi Kazuyo, Jin Yongcheng, Maruyama Ippei, Hibino Takashi

JOURNAL OF MATERIALS CHEMISTRY A Vol. 8 ( 30 ) page： 15157 - 15166 2020.8

Fuel cell and electrolyzer using plastic waste directly as fuel

Hori Tetsuya, Kobayashi Kazuyo, Teranishi Shinya, Nagao Masahiro, Hibino Takashi

WASTE MANAGEMENT Vol. 102 page： 30 - 39 2020.2

A Cellulose Electrolysis Cell with Metal-Free Carbon Electrodes International coauthorship

Li Yaorong, Nagao Masahiro, Kobayashi Kazuyo, Jin Yongcheng, Hibino Takashi

CATALYSTS Vol. 10 ( 1 ) 2020.1

Humidity Driven Transition from Insulator to Ionic Conductor in Portland Cement

Nagao Masahiro, Kobayashi Kazuyo, Hori Tetsuya, Li Yaorong, Hibino Takashi

MATERIALS Vol. 12 ( 22 ) 2019.11

Addition of Docetaxel to Oral Fluoropyrimidine Improves Efficacy in Patients With Stage III Gastric Cancer: Interim Analysis of JACCRO GC-07, a Randomized Controlled Trial

Kazuhiro Yoshida, Yasuhiro Kodera, Mitsugu Kochi, Wataru Ichikawa, Yoshihiro Kakeji, Takeshi Sano, Narutoshi Nagao, Masazumi Takahashi, Akinori Takagane, Takuya Watanabe, Masahide Kaji, Hiroshi Okitsu, Takashi Nomura, Takanori Matsui, Takaki Yoshikawa, Jin Matsuyama, Makoto Yamada, Seiji Ito, Masahiro Takeuchi, Masashi Fujii

Journal of Clinical Oncology Vol. 37 ( 15 ) page： 1296 - 1304 2019.5

Language：English Publishing type：Research paper (scientific journal) Publisher：American Society of Clinical Oncology (ASCO)

<jats:sec><jats:title>PURPOSE</jats:title><jats:p> S-1 is a standard postoperative adjuvant chemotherapy for patients with stage II or III gastric cancer in Asia. Neoadjuvant or perioperative strategies dominate in Western countries, and docetaxel has recently shown significant survival benefits when combined with other standard regimens in advanced cancer and perioperative settings. </jats:p></jats:sec><jats:sec><jats:title>PATIENTS AND METHODS</jats:title><jats:p> This randomized phase III study was designed to prove the superiority of postoperative S-1 plus docetaxel over S-1 alone for R0 resection of pathologic stage III gastric cancer. The sample size of 1,100 patients was necessary to detect a 7% increase in 3-year relapse-free survival as the primary end point (hazard ratio, 0.78; 2-sided α = .05; β = .2). </jats:p></jats:sec><jats:sec><jats:title>RESULTS</jats:title><jats:p> The second interim analysis was conducted when the number of events reached 216 among 915 enrolled patients (median follow-up, 12.5 months). Analysis demonstrated the superiority of S-1 plus docetaxel (66%) to S-1 (50%) for 3-year relapse-free survival (hazard ratio, 0.632; 99.99% CI, 0.400 to 0.998; stratified log-rank test, P < .001), and enrollment was terminated as recommended by the independent data and safety monitoring committee. Incidences of grade 3 or greater adverse events, particularly neutropenia and leukopenia, were higher in the S-1 plus docetaxel group, but all events were manageable. </jats:p></jats:sec><jats:sec><jats:title>CONCLUSION</jats:title><jats:p> Addition of docetaxel to S-1 is effective with few safety concerns in patients with stage III gastric cancer. The present findings may also be applicable in countries in which perioperative adjuvant chemotherapy or chemoradiation is not standard. </jats:p></jats:sec>

DOI： 10.1200/jco.18.01138

CiNii Research

Electrolysis of humidified methane to hydrogen and carbon dioxide at low temperatures and voltages

Hori Tetsuya, Ma Qiang, Kobayashi Kazuyo, Nagao Masahiro, Teranishi Shinya, Hibino Takashi

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Vol. 44 ( 5 ) page： 2454 - 2460 2019.1

Intermediate-temperature electrolysis of energy grass Miscanthus sinensis for sustainable hydrogen production

Ito Masaya, Hori Tetsuya, Teranishi Shinya, Nagao Masahiro, Hibino Takashi

SCIENTIFIC REPORTS Vol. 8 ( 1 ) page： 16186 2018.11

Direct electrolysis of waste newspaper for sustainable hydrogen production: an oxygen-functionalized porous carbon anode

Hibino Takashi, Kobayashi Kazuyo, Ito Masaya, Nagao Masahiro, Fukui Mai, Teranishi Shinya

APPLIED CATALYSIS B-ENVIRONMENTAL Vol. 231 page： 191 - 199 2018.9

Efficient Hydrogen Production by Direct Electrolysis of Waste Biomass at Intermediate Temperatures

Takashi Hibino, Kazuyo Kobayashi, Masaya Ito, Qiang Ma, Masahiro Nagao, Mai Fukui, Shinya Teranishi

ACS Sustainable Chemistry & Engineering Vol. 6 ( 7 ) page： 9360 - 9368 2018.7

Hydrogen Production by Direct Lignin Electrolysis at Intermediate Temperatures

Hibino Takashi, Kobayashi Kazuyo, Nagao Masahiro, Teranishi Shinya

CHEMELECTROCHEM Vol. 4 ( 12 ) page： 3032 - 3036 2017.12

High Performance Anode for Direct Cellulosic Biomass Fuel Cells Operating at Intermediate Temperatures

Hibino Takashi, Kobayashi Kazuyo, Lv Peiling, Nagao Masahiro, Teranishi Shinya

Bulletin of the Chemical Society of Japan Vol. 90 ( 9 ) page： 1017 - 1026 2017.9

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

Cellulosic biomass resources have considerable potential as a renewable energy source that can be used for the cogeneration of electricity and heat. The utilization of these resources generally requires three major systematic processes: gasification, gas processing, and gas utilization. If a power generator could operate using wood resources directly as fuels, then this system could be significantly simplified, thereby reducing initial equipment cost and enhancing application flexibility. An intermediate-temperature fuel cell could possibly realize such an operation; however, the fuel-cell characteristics, especially the catalytic activity of the Pt/C anode, are not sufficient at present. In this study, we attempted to improve the anode activity by alloying Pt with other metals, followed by optimization of the alloy in terms of its atomic ratio and content. The resulting PtFe/C anode yielded higher power densities (37–42 mW cm−2) and energy densities (125–169 Wh kg−1) at 250 °C for fuels composed of cypress, tissue paper, and cotton, compared to those obtained using the Pt/C anode, despite its smaller Pt loading.

DOI： 10.1246/bcsj.20170163

Web of Science

Scopus

CiNii Research

Grammatical evolution using two-dimensional gene for symbolic regression: an advanced improvement with conditional statement grammar Reviewed

Hideyuki Sugiura, Masahiro Nagao, Yi Zuo, Eisuke Kita

International Journal of Computational Intelligence Studies Vol. 5 ( 3-4 ) page： 237-251 2017.4

Balancing setup workers' load of flexible job shop scheduling using hybrid genetic algorithm with tabu search strategy Reviewed

Yasuhiko Morinaga, Masahiro Nagao, Mitsuru Sano

International Journal of Decision Support Systems Vol. 2 ( 1-3 ) page： 71-90 2017.1

An Intermediate-Temperature Biomass Fuel Cell UsingWood Sawdust and Pulp Directly as Fuel

Hibino Takashi, Kobayashi Kazuyo, Lv Peiling, Nagao Masahiro, Teranishi Shinya, Mori Toshiyuki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 164 ( 6 ) page： F557 - F563 2017

NOx Sensing Characteristics of Semiconductor Gas Sensors under Controlled Oxygen Activity Conditions Using a Proton-Conducting Electrolyte

Nagao Masahiro, Kobayashi Kazuyo, Lv Peiling, Teranishi Shinya, Hibino Takashi

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 164 ( 9 ) page： B397 - B402 2017

Grammatical Evolution using Tree Representation Learning

Shunya Maruta, Yi Zuo, Masahiro Nagao, Hideyuki Sugiura, Eisuke Kita

The 24th International Conference On Neural Information Processing Vol. 10637 page： 346 - 355 2017

　 PREV - NEXT 　

<NAGAO, Masahiro>

Papers - NAGAO, Masahiro