Faculty Profiles - KUGA KAZUKI

Information

写真a

KUGA KAZUKI

Organization

Faculty of Engineering Sciences Department of Advanced Environmental Science and Engineering Assistant Professor
School of Engineering （Joint Appointment）
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences（Joint Appointment）

Profile

我々の生活環境には，あらゆるスケールで健康を脅かすリスクが存在しています．例えば，室内環境という比較的狭いスケールを考えれば，主流煙，副流煙を含む環境煙草煙や開放形燃焼機器の排ガスによる高濃度短期暴露の問題，シックハウス症候群に代表される微量の揮発性有機化合物VOCsによる低濃度長期暴露の問題，数nmから数百μmの粒径を有する各種エアロゾル粒子(PM2.5や咳によるインフルエンザウイルスなどの飛沫・飛沫核も含む)による空気汚染問題などが挙げられます．このような問題を緩和・解消し，良質な室内空気環境設計を実現するためには，室内環境中に存在する各種のガス状･エアロゾル状汚染物質を対象とした正確な濃度分布予測と，その予測結果を基にした濃度低減対策技術の確立が重要な研究課題です．その際，居住者の人体暴露量の最小化が設計目標となるべきであり，室内環境中には不均一な流れ場，汚染物質濃度場が形成されていることを鑑みれば，予測設計手法の中に人体モデルの組み込みは必須です．このような背景のもと，室内空気を呼吸することに起因する経気道暴露や，空気と皮膚が接触もしくは建材屋什器表面と皮膚が接触することによる経皮暴露を詳細かつ正確に予測する汎用的な数値人体モデルの開発に取り組んでいます．

Awards

Healthy Buildings Asia 2023 Best Paper Award

2023.7 International Society of Indoor Air Quality and Climate
日本建築学会奨励賞

2022.4 日本建築学会 A numerical investigation of the potential effects of e-cigarette smoking on local tissue dosimetry and the deterioration of indoor air quality 本論文は、室内気流解析の手法を人体にも適用し、気道内を含めた人体モデルを作成して呼吸に伴う人体と室内環境のシミュレーションを行うことで、電子タバコ喫煙時の主流煙の自身への生体的な側面を含めた影響と、呼気に伴う第三者への曝露の影響について定量予測を行った内容である。計算流体力学による空間分布や気道内分布の解析を行うのみならず、生理的薬物動態解析を統合することで経皮吸収に関する曝露率などからの評価を提案した点が、従来の建築環境工学分野の知見と生理学的知見とを適切に融合しており、新領域･方法の開拓にあたると判断された。また、それに伴って非常に多くの海外文献等とも照らし合わせられた緻密な進行と分析がなされた点も高く評価された。空間内の様々な径の飛散物に関する吸入と再放散に伴う人体影響評価は、感染症拡大がすすむ現在から今後の社会ではもちろんのこと、その他の無機･有機粒子の吸入における影響予測を含めても今後必要とされる知見と考えられ、将来性も高いと考えられた。以上より、日本建築学会奨励賞にふさわしい優れた業績として高く評価する。

Papers

Net escape velocity, transfer probability, and travel time distributions within a cross-ventilated room model sheltered by urban-like block array Reviewed International journal

Ryu Itokazu, Ken Bryan Fernandez, Kazuki Kuga, Naoki Ikegaya, Kazuhide Ito

Building and Environment 2024.5

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DOI： https://doi.org/10.1016/j.buildenv.2024.111668
In silico identification of viral loads in cough-generated droplets – Seamless integrated analysis of CFPD-HCD-EWF Reviewed International journal

2024.2

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DOI： https://doi.org/10.1016/j.cmpb.2024.108073
Effect of crowd density, wind direction, and air temperature on the formation of individual human breathing zones in a semi-outdoor environment Reviewed International journal

Islam.M.S. Abouelhamd, Kazuki Kuga, Sung-Jun Yoo, Kazuhide Ito

Sustainable Cities and Society 2024.2

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DOI： https://doi.org/10.1016/j.scs.2024.105274
Integration of computer-simulated persons with multi-node thermoregulation model that considers the effect of clothing for skin surface temperature distribution analysis Reviewed International journal

Hyungyu Park, Sung-Jun Yoo, Janghoo Seo, Sumiyoshi Eisaku, Harashima Hiroshi, Kazuki Kuga, Kazuhide Ito

Building and Environment 2024.2

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DOI： https://doi.org/10.1016/j.buildenv.2023.111105
An agent-based nested model integrating within-host and between-host mechanisms to predict an epidemic Reviewed International journal

Yuichi Tatsukawa, Md. Rajib Arefin, Kazuki Kuga, Jun Tanimoto

PLOS ONE 2024.2

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DOI： https://doi.org/10.1371/journal.pone.0295954
Aspiration efficiency and respiratory tract deposition of indoor suspended micro-particles during steady and transient breathings Invited Reviewed International journal

Kazuki Kuga, Ryusei Kizuka, Islam M.S. Abouelhamd, Kazuhide Ito

Building and Environment 2024.1

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DOI： https://doi.org/10.1016/j.buildenv.2023.111114

Repository Public URL： https://hdl.handle.net/2324/7174316
Coupled Eulerian Wall Film–Discrete Phase model for predicting respiratory droplet generation during a coughing event Reviewed International journal

35 ( 11 ) 2023.11

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DOI： https://doi.org/10.1063/5.0174014
Seamless numerical analysis of transient infectious droplet dispersion and inhalation exposure - In silico study Reviewed International journal

Takumi Nishihara, Hanyu Li, Kazuki Kuga, Kazuhide Ito

Building and Environment 2023.10

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DOI： https://doi.org/10.1016/j.buildenv.2023.110748
A pilot numerical study of odorant transport to the olfactory region during sensory evaluations following ISO 16000-28 Reviewed International journal

Kazuki Kuga, Sara Hoshiyama, Pawel Wargocki, Kazuhide Ito

Building and Environment 2023.9

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DOI： https://doi.org/10.1016/j.buildenv.2023.110868
Visual prediction and parameter optimization of viral dynamics in the mucus milieu of the upper airway based on CFPD-HCD analysis Reviewed International journal

Hanyu Li, Kazuki Kuga, Kazuhide Ito

Computer Methods and Programs in Biomedicine 2023.8

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DOI： https://doi.org/10.1016/j.cmpb.2023.107622
Identification of probabilistic size of breathing zone during single inhalation phase in semi-outdoor environmental scenarios Reviewed International journal

Islam Abouelhamd, Kazuki Kuga, Sung-Jun Yoo, Kazuhide Ito

Building and Environment 2023.7

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DOI： https://doi.org/10.1016/j.buildenv.2023.110672
Computational fluid-particle dynamics modeling of ultrafine to coarse particles deposition in the human respiratory system, down to the terminal bronchiole Reviewed International journal

Nguyen Dang Khoa, Sixiao Li, Nguyen Lu Phuong, Kazuki Kuga, Hidetake Yabuuchi, Keiko Kan-o, Koichiro Matsumoto, Kazuhide Ito

Computer Methods and Programs in Biomedicine 2023.5

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DOI： https://doi.org/10.1016/j.cmpb.2023.107589
Effect of transient breathing cycle on the deposition of micro and nanoparticles on respiratory walls Reviewed International journal

Kazuki Kuga, Ryusei Kizuka, Nguyen Dang Khoa, Kazuhide Ito

Computer Methods and Programs in Biomedicine 2023.3

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DOI： https://doi.org/10.1016/j.cmpb.2023.107501
Epidemic dynamics for time-dependent transmission rate based on viral load dynamics: multi infection stage EBCM approach Invited Reviewed International journal

Kazuki Kuga

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT 2022 ( 10 ) 2022.10

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1742-5468/ac8e59
Stochasticity of disease spreading derived from the microscopic simulation approach for various physical contact networks. Reviewed International journal

Tatsukawa Yuichi, Arefin M. R., Utsumi Shinobu, Kuga Kazuki, Tanimoto Jun.

Applied Mathematics and Computation 431 127328 2022.10

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DOI： https://doi.org/10.1016/j.amc.2022.127328
Influence of inlet turbulent condition on the formation mechanism of local scalar concentrations Reviewed International journal

Haruna Yamasawa, Teruaki Hirayama, Ryota Muta, Kazuki Kuga, Tomohiro Kobayashi, Kazuhide Ito

Japan Architectural Review 2022.9

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DOI： https://doi.org/10.1002/2475-8876.12299
室内におい香り環境評価のための数理モデル開発研究: 数値気道モデルを用いた気相アセトン呼吸時における前鼻腔・後鼻腔性経路の輸送動態解析 Reviewed

星山紗来, 久我一喜, 吉田伸治, 伊藤一秀

日本建築学会環境系論文集 87 ( 798 ) 541 - 549 2022.8

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In this study, following the procedure of the perceptive air quality test described in ISO 16000-28 and ISO 16000-30, we numerically analyzed the odorant transportation from the odorant generator to human breathing zone using acetone which is considered as a standard substance for pi-scale evaluation. For the evaluation of access to olfactory receptors under a transient breathing cycle, the acetone adsorption flux to the olfactory epithelial cells was calculated by using computer simulated person (CSP) with numerical respiratory tract model and physiologically based pharmacokinetic (PBPK) model.

DOI： https://doi.org/10.3130/aije.87.541
Prediction of exhaled carbon dioxide concentration using a computer-simulated person that included alveolar gas exchange Invited Reviewed International journal

Kazuki Kuga, Mitsuharu Sakamoto, Pawel Wargocki, Kazuhide Ito

INDOOR AIR 32 ( 8 ) 2022.8

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DOI： 10.1111/ina.13079
SARS-CoV-2 Dynamics in the Mucus Layer of the Human Upper Respiratory Tract Based on Host-Cell Dynamics Reviewed International journal

Hanyu Li, Kazuki Kuga, Kazuhide Ito

SUSTAINABILITY 14 ( 7 ) 2022.4

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DOI： 10.3390/su14073896
CO2 emission rates from sedentary subjects under controlled laboratory conditions Reviewed International journal

Building and Environment 2022.3

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DOI： https://doi.org/10.1016/j.buildenv.2021.108735
Effects of void nodes on epidemic spreads in networks Reviewed International journal

Kazuki Kuga, Jun Tanimoto

Scientific Reports 2022.3

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DOI： https://doi.org/10.1038/s41598-022-07985-9
Breathing zone and exhaled air re‐inhalation rate under transient conditions assessed with a computer‐simulated person Reviewed International journal

32 ( 2 ) 2022.2

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The breathing zone of an individual indoors is usually defined as a finite region steadily formed in front of a face. Assuming the steady formation of the breathing zone, we propose a procedure for quantitatively identifying a breathing zone formed in front of a human face in the transient condition. This assumption is reasonable considering that the ventilation time scale of human respiration is sufficiently short compared to the ventilation time scale of a room. We used steady-state computational fluid dynamics (CFD) and a computationally simulated person (CSP). We present the probabilistic size of the breathing zone for various postures and breathing conditions. By analyzing unsteady inhalation and exhalation airflow characteristics via a CSP with a respiratory system, we also estimated the direct re-inhalation rate of the exhaled air. The results can be used for developing methods to control the long-term and low-contaminant concentration exposures.

DOI： https://doi.org/10.1111/ina.13003
The effects of ventilation and temperature on sleep quality and next-day work performance: Pilot measurements in a climate chamber. Reviewed International journal

Xiaojun Fan, Huiqi Shao, #Mitsuharu Sakamoto, Kazuki Kuga, Li Lan, David P. Wyon, Kazuhide Ito, Mariya P. Bivolarova, Chenxi Liao, Pawel Wargocki

Building and Environment 209 ( 108666 ) 108666 2022.2

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DOI： https://doi.org/10.1016/j.buildenv.2021.108666
Emission rate of carbon dioxide while sleeping Reviewed International journal

Xiaojun Fan, Mitsuharu Sakamoto, Huiqi Shao, Kazuki Kuga, Kazuhide Ito, Li Lan, Pawel Wargocki

Indoor air 31 ( 6 ) 2142 - 2157 2021.8

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DOI： https://doi.org/10.1111/ina.12911
Secondary indoor air pollution and passive smoking associated with cannabis smoking using electric cigarette device–demonstrative in silico study Reviewed International journal

17 ( 5 ) e1009004 - e1009004 2021.5

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Language：Japanese Publishing type：Research paper (scientific journal)

With electronic (e)-liquids containing cannabis components easily available, many anecdotal examples of cannabis vaping using electronic cigarette devices have been reported. For electronic cigarette cannabis vaping, there are potential risks of secondary indoor air pollution from vapers. However, quantitative and accurate prediction of the inhalation and dermal exposure of a passive smoker in the same room is difficult to achieve due to the ethical constraints on subject experiments. The numerical method, i.e., in silico method, is a powerful tool to complement these experiments with real humans. In this study, we adopted a computer-simulated person that has been validated from multiple perspectives for prediction accuracy. We then conducted an in silico study to elucidate secondary indoor air pollution and passive smoking associated with cannabis vaping using an electronic cigarette device in an indoor environment. The aerosols exhaled by a cannabis vaper were confirmed to be a secondary emission source in an indoor environment; non-smokers were exposed to these aerosols via respiratory and dermal pathways. Tetrahydrocannabinol was used as a model chemical compound for the exposure study. Its uptake by the non-smoker through inhalation and dermal exposure under a worst-case scenario was estimated to be 5.9% and 2.6% of the exhaled quantity from an e-cigarette cannabis user, respectively.

DOI： https://doi.org/10.1371/journal.pcbi.1009004
The effects of warmth and CO2 concentration, with and without bioeffluents, on the emission of CO2 by occupants and physiological responses Reviewed International journal

Kazuki Kuga, Kazuhide Ito, Pawel Wargocki

INDOOR AIR 2021.4

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1111/ina.12852
Pair approximation model for the vaccination game: predicting the dynamic process of epidemic spread and individual actions against contagion Reviewed International journal

Kazuki Kuga, Masaki Tanaka, Jun Tanimoto

Proceedings of the Royal Society A 477 ( 2246 ) 20200769 - 20200769 2021.2

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DOI： 10.1098/rspa.2020.0769
A numerical investigation of the potential effects of e-cigarette smoking on local tissue dosimetry and the deterioration of indoor air quality Reviewed International journal

Kuga Kazuki, Ito Kazuhide, Chen Wenhao, Wang Ping, Kumagai Kazukiyo

INDOOR AIR 30 ( 5 ) 1018 - 1038 2020.9

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1111/ina.12666
The impact of information spreading on epidemic vaccination game dynamics in a heterogeneous complex network- A theoretical approach Reviewed International journal

KM Ariful Kabir, Kazuki Kuga, Jun Tanimoto

CHAOS SOLITONS & FRACTALS 132 109548 2020.3

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DOI： 10.1016/j.chaos.2019.109548
Can the inhalation exposure of a specific worker in a cross-ventilated factory be evaluated by time- and spatial-averaged contaminant concentration Reviewed International journal

Alicia Murga, Kazuki Kuga, Sung-Jun Yoo, Kazuhide Ito

ENVIRONMENTAL POLLUTION 252 1388 - 1398 2019.9

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DOI： 10.1016/j.envpol.2019.06.056
To vaccinate or not to vaccinate: A comprehensive study of vaccination-subsidizing policies with multi-agent simulations and mean-field modeling Reviewed International journal

Kuga Kazuki, Tanimoto Jun, Jusup Marko

JOURNAL OF THEORETICAL BIOLOGY 469 107 - 126 2019.5

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DOI： 10.1016/j.jtbi.2019.02.013
Three-strategy and four-strategy model of vaccination game introducing an intermediate protecting measure Reviewed International journal

Muntasir Alam, Kazuki Kuga, Jun Tanimoto

APPLIED MATHEMATICS AND COMPUTATION 346 408 - 422 2019.4

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.amc.2018.10.015
Effect of information spreading to suppress the disease contagion on the epidemic vaccination game Reviewed International journal

KM Ariful Kabir, Kazuki Kuga, Jun Tanimoto

CHAOS SOLITONS & FRACTALS 119 180 - 187 2019.2

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.chaos.2018.12.023
Analysis of SIR epidemic model with information spreading of awareness Reviewed International journal

KM Ariful Kabir, Kazuki Kuga, Jun Tanimoto

CHAOS SOLITONS & FRACTALS 119 118 - 125 2019.2

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.chaos.2018.12.017
Impact of imperfect vaccination and defense against contagion on vaccination behavior in complex networks Reviewed International journal

Kuga Kazuki, Tanimoto Jun

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT 2018 ( 11 ) 113402 2018.11

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1742-5468/aae84f
First- and second-hand smoke dispersion analysis from e-cigarettes using a computer-simulated person with a respiratory tract model Reviewed International journal

Kuga Kazuki, Ito Kazuhide, Yoo Sung-Jun, Chen Wenhao, Wang Ping, Liao Jiawen, Fowles Jeff, Shusterman Dennis, Kumagai Kazukiyo

INDOOR AND BUILT ENVIRONMENT 27 ( 7 ) 898 - 916 2018.8

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DOI： 10.1177/1420326X17694476
呼吸器系統合型数値人体モデルを用いた電子煙草 (e-Cigarette) 使用に伴う 1 次・2 次暴露リスクの定量評価 Reviewed

久我一喜，劉城準，伊藤一秀

日本建築学会環境系論文集 83 ( 754 ) 1005 - 1013 2018.4

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In the recent decades, stricter regulation for cigarette industry has been established due to serious health effect of tobacco smoke which contains various harmful chemical compounds, and electric cigarette (e-cigarette, vape) which is composed of e-liquid and heating device has been widely popularized throughout the world. Although e-liquid mainly contains nicotine and some additives, it was reported that aldehydes occurred by heating e-liquid cause health risks for e-cigarette users (first-hand smokers) and second-hand smokers. The purpose of this research is to develop a comprehensive prediction method for quantitative estimation of respiratory exposure risks to e-cigarette smoke. Previously, we have developed in silico computer simulated person(CSP) which is reproduced actual shape of human body and respiratory tract in detail. The CSP, which was prepared for the numerical analysis, was integrated with CFD analysis in order to predict contaminant transfer in indoors and inside human airway. Moreover, physiologically based pharmacokinetic(PBPK) model was adopted in the airway part of CSP. This PBPK model enables to estimate contaminant adsorption at airway wall surface and contaminant reaction/transfer phenomenon inside airway tissue. Assuming e-cigarette smoker and the other occupant in the simple room, first-hand/second-hand exposure risks of inhaled formaldehyde was estimated under the unsteady breathing condition.
As a result, it was revealed that 39% of inhaled formaldehyde was adsorbed into airway wall surface, and 47% was reached to the lungs through the bronchioles. 11% of inhaled formaldehyde was re-discharged from the airway when the breathing cycle is in the exhalation mode. This formaldehyde was reached to the other occupant, and 2% of the exhaled formaldehyde from e-cigarette smoker was inhaled into occupant's airway.
This study demonstrated a comprehensive analysis of inhalation exposure, especially first-hand/second-hand exposure risks in indoor space. The movement of first-hand e-cigarette smoke in the human airway and its health risk was quantitatively analyzed by using PBPK-CFD hybrid analysis. Moreover, transfer phenomenon of the second-hand e-cigarette smoke in indoor space, and second-hand exposure risk were simultaneously estimated. We believe the in silico human model(CSP) integrated with PBPK-CFD hybrid analysis has great potential for inhalation exposure risks assessment of e-cigarette smoke.

DOI： https://doi.org/10.3130/aije.83.1005
Which is more effective for suppressing an infectious disease: imperfect vaccination or defense against contagion? Reviewed International journal

Kazuki Kuga, Jun Tanimoto

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT 2018.2

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DOI： 10.1088/1742-5468/aaac3c
Prediction of convective heat transfer coefficients for the upper respiratory tracts of rat, dog, monkey, and humans Reviewed International journal

Ito Kazuhide, Mitsumune Koki, Kuga Kazuki, Phuong L Nguyen, Tani Kenji, Inthavong Kiao

INDOOR AND BUILT ENVIRONMENT 26 ( 6 ) 828 - 840 2017.7

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DOI： 10.1177/1420326X16662111

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Presentations

Formation of Acetone concentration distribution around breathing zone and transport efficiency to olfactory epithelium cells International conference

Sara Hoshiyama, Kazuki Kuga, Kazuhide Ito

COBEE 2022 2022.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Canada
Numerical investigation of cough droplets dispersion dynamics in indoor environment: Effect of oral cavity shape International conference

Takumi Nishihara, Kazuki Kuga, Kazuhide Ito

COBEE 2022 2022.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Canada
Integrated Modeling of CO2 Transport from Indoor to Alveolar Region for Elucidating Human CO2 Emission Mechanism International conference

Kazuki Kuga, Kazuhide Ito

COBEE 2022 2022.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Canada
SARS-CoV-2 infection dynamics integrated with mucociliary transport in human upper airway International conference

Hanyu Li, Kazuki Kuga, Kazuhide Ito

COBEE 2022 2022.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Canada
Regional deposition of inhaled nano-to-microscale particle in realistic upper respiratory tract under steady and transient breathing conditions International conference

Ryusei Kizuka, Kazuki Kuga, Kazuhide Ito

COBEE 2022 2022.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Canada
Influence of Exhaust Opening Height on Indoor Environment in Impinging Jet Ventilated Room International conference

Haruna Yamasawa, Mathias Cehlin, Arman Ameen, Tomohiro Kobayashi, Kazuki Kuga, Kazuhide Ito

Healthy Building 2023 Asia 2023.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：China
Effects of air temperature and thermal comfort on human carbon dioxide emission rate in the case of a step change in the physical activity levels International conference

Jiayi Zhu, Ken Bryan Fernandez, Kazuki Kuga, Pawel Wargocki, Kazuhide Ito

Healthy Building 2023 Asia 2023.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Aspiration probability and resulting airway deposition of indoor particles during steady and transient breathings International conference

Kazuki Kuga and Kazuhide ito

Healthy Building 2023 Asia 2023.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：China
Effect of turbulent inlet boundary conditions on pollutant emissions and dispersion in an indoor environment International conference

Teruaki Hirayma, Haruna Yamasawa, Kazuki Kuga, Kazuhide Ito.

Healthy Building 2023 Asia 2023.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：China
Host Cell Dynamics model development and specific parameterization for 3D upper respiratory tract model coupled with CFPD analysis International conference

Hanyu Li, Kazuki Kuga, Kazuhide Ito

Healthy Building 2023 Asia 2023.7

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：China
Computational fluid and particle dynamics simulation of airborne transmission in indoor environment - Effect of physical distance from infected person International conference

Takumi Nishihara, Kazuki Kuga, Kazuhide Ito

IAQVEC 2023 2023.5

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Parameter Optimization of a Viral Dynamics Model in the Mucus Layer of the Human Nasal Cavity-Nasopharynx Based on Computational Fluid-Particle and Host-Cell Dynamics International conference

Hanyu Li, Kazuki Kuga, Kazuhide Ito

IAQVEC 2023 2023.5

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Event date： 2023.5

Language：English Presentation type：Oral presentation (general)

Country：Japan
Impact of room temperature on human carbon dioxide emission rates at different physical activity levels International conference

Kazuki Kuga, Pawel Wargocki, Kazuhide Ito

Indoor Air 2022 2022.6

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Event date： 2022.6

Language：English Presentation type：Oral presentation (general)

Country：Japan
Particle Dispersion Analysis in a Numerical Airway Model Under Transient Breathing International conference

Ryusei Kizuka, Nguyen Dang Khoa, Kazuki Kuga, Kazuhide Ito

Healthy Building America 2022.1

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Country：United States
室内におい香り環境評価のための高精度数値鼻の開発研究－気相アセトン呼吸時における鼻腔内および臭粘液・嗅上皮層への輸送動態解析

星山紗来，久我一喜，伊藤一秀

空気調和･衛生工学会　九州支部学術技術交流会 2021.12

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
肺胞ガス交換モデルを用いた人体二酸化炭素呼出量予測

坂本光陽，久我一喜，伊藤一秀

室内環境学会学術大会講演集 2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
SARS-CoV-2 Dynamics in Mucus Layer of Upper Airway Based on Host-cell Dynamics

2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Effects of morphological simplification on airflow pattern of a French bulldog airway: in silico comparative study

2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
呼吸器系統合型数値人体モデルを用いた気相アセトン呼吸時における鼻腔内および嗅粘液・嗅上皮層への輸送動態解析

星山紗来，久我一喜，伊藤一秀

室内環境学会学術大会講演集 2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都 Country：Japan
非定常呼吸条件下での数値気道モデル内の微粒子沈着予測

木塚竜生，久我一喜，伊藤一秀

室内環境学会学術大会講演集 2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都 Country：Japan
定常呼吸条件下での人体呼吸域同定解析

久我一喜，伊藤一秀

室内環境学会学術大会講演集 2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都 Country：Japan
対面する感染者からの咳飛沫吸入曝露シミュレーション

西原択海，久我一喜，伊藤一秀

室内環境学会学術大会講演集 2021.11

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Event date： 2022.1

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都 Country：Japan
Effects of Initial Conditions and Parameters on the Prediction of SARS-CoV-2 Viral Load in the Upper Respiratory Tract Based on Host-Cell Dynamics International conference

Hanyu Li, Kazuki Kuga, Nguyen Dang Khoa, Kazuhide Ito

IEICES 2021 2021.10

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Event date： 2021.10

Language：English Presentation type：Oral presentation (general)

Country：Japan
Numerical Investigation of Human CO2 Emission in a Personalized Work Environment International conference

Kazuki Kuga, Mitsuharu Sakamoto, Pawel Wargocki, Kazuhide Ito

Healthy Buildings Europe 2021 2021.6

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Event date： 2021.6

Language：English Presentation type：Oral presentation (general)

Country：Norway
e-Cigaretteを対象とした経気道暴露シミュレーション　(第1報) Partition Coefficientを用いたガス－粘膜上皮相濃度の変換と吸着フラックス算出法

松尾俊紀，久我一喜，山下真登，Sung-Jun Yoo，伊藤一秀

日本建築学会九州支部研究発表会･研究報告 2016.3

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
Flow and Hygrothermal Transfer Analysis in Three Dimensional Clothing Model integrated with Computer Simulate Person International conference

Murota Kei, Yujin Kang, Kazuki Kuga, Sung-Jun Yoo, K Takenouchi, S Tanabe and Kazuhide Ito

Indoor Air 2020 2020.11

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Japan
Three Dimensional Clothing Model integrated with Computer Simulate Person for Computational Fluid Dynamics Simulation International conference

Yujin Kang, Murota Kei, Kazuki Kuga, Sung-Jun Yoo, K Takenouchi, S Tanabe and Kazuhide Ito

Indoor Air 2020 2020.11

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Japan
CO2 Emission Rates from Humans at Light Activity (ICHEAR project) International conference

Mitsuharu Sakamoto, Kazuki Kuga, Kazuhide Ito, G Beko, J Williams and P Wargocki

Indoor Air 2020 2020.11

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Japan
Physiological responses and CO2 emission of humans at thermally warm temperature and reduced air quality International conference

Kazuki Kuga, Kazuhide Ito, Pawel Wargocki

Indoor Air 2020 2020.11

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Japan
着衣内空気層での換気解析を統合した数値人体モデルによる皮膚表面温度予測

室田圭，久我一喜，姜裕珍，劉城準，伊藤一秀

室内環境学会学術大会講演集 2019.12

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
必要換気量設計の為の二酸化炭素発生量予測モデルの開発　（第2報）在室者の二酸化炭素呼出量に対する室内温湿度の影響

坂本光陽，久我一喜，Pawel Wargocki，伊藤一秀

室内環境学会学術大会講演集 2019.12

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
必要換気量設計の為の二酸化炭素発生量予測モデルの開発　（第1報）在室者の二酸化炭素呼出量に対する室内二酸化炭素濃度の影響

久我一喜，坂本光陽，Pawel Wargocki，伊藤一秀

室内環境学会学術大会講演集 2019.12

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
室内物理環境要素は人体からの二酸化炭素発生量にどの程度の影響を与えるか？

坂本光陽，久我一喜，Pawel Wargocki，伊藤一秀

九州支部学術技術交流会 2019.10

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Comparative inhalation exposure/toxicology analysis of e-cigarette vapors with different puffing behaviors using PBPK-CSP-CFD approach International conference

Kazuki Kuga, Kazuhide Ito

IAQVEC 2019 2019.9

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Italy
Assessment of E-cigarette smoking using in silico human respiratory tract model integrated with coupled PBPK-CFD analysis International conference

Kazuki Kuga, Sung-Jun Yoo, Kazuhide Ito, Wenhao Chen, Ping Wang, Jeff Fowles, Kazukiyo Kumagai, Dennis Shusterman

Roomvent-Ventilation 2018 2018.6

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Finland
気道粘膜上皮を対象とした電子煙草由来カルボニル化合物暴露のin silico評価

久我一喜，Sung-Jun Yoo，伊藤一秀

室内環境学会学術大会講演集 2017.12

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：佐賀 Country：Japan
Virtual Bronchiole Model Based on the Numerical Respiratory Tract Model for Comprehensive Exposure Assessment to E-Cigarettes International conference

Kazuki Kuga, Sung-Jun Yoo, Kazuhide Ito, Wenhao Chen, Ping Wang, Jeff Fowles, Dennis Shusterman, Kazukiyo Kumagai

Healthy Buildings 2017Asia 2017.9

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Taiwan, Province of China
Numerical Prediction of Contaminant Distributions in Human Respiratory Tract for Exposure Assessment to E-Cigarettes International conference

Kazuki Kuga, Toshiki Matsuo, Sung-Jun Yoo, Kazuhide Ito, Wenhao Chen, Ping Wang, Jiawen Liao, Jeff Fowles, Dennis Shusterman, Kazukiyo Kumagai,

Indoor Air 2016 2016.7

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Event date： 2021.4

Language：English Presentation type：Oral presentation (general)

Country：Belgium
e-Cigaretteを対象とした経気道暴露シミュレーション　(第3報) 総合的な経気道曝露評価のための下気道モデル

久我一喜，伊藤一秀

日本建築学会九州支部研究発表会･研究報告 2017.3

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：長崎 Country：Japan
咳由来の飛沫･飛沫核の輸送モデルとCFD-CSPとの連成解析

松本秀真，久我一喜，劉城準，伊藤一秀

日本建築学会九州支部研究発表会･研究報告 2017.3

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：長崎 Country：Japan
ラット・イヌ・サル・ヒトを対象とした上気道内対流熱伝達率解析

光宗航基，久我一喜，山下真登，Sung-Jun Yoo，伊藤一秀

日本建築学会九州支部研究発表会･研究報告 2016.3

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
e-Cigaretteを対象とした経気道暴露シミュレーション　(第2報) ラット･イヌ･サルの数値気道モデルを対象とした経気道暴露濃度予測

久我一喜，松尾俊紀，山下真登，Sung-Jun Yoo，伊藤一秀

日本建築学会九州支部研究発表会･研究報告 2016.3

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Event date： 2021.4

Language：Japanese Presentation type：Oral presentation (general)

Venue：沖縄 Country：Japan
Numerical investigation of alveolus gas exchange for human CO2 emission in the chamber experiment

Mitsuharu Sakamoto, Kazuki Kuga, Kazuhide Ito, Pawel Wargocki

Healthy Building America 2021 2021.1

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Event date： 2021.1

Language：English Presentation type：Oral presentation (general)

Country：United States
Regional Deposition of Airborne SARS-CoV-2 Laden Droplets in the Upper Airway and Its Effects Using Host-Cell Dynamics International conference

Hanyu Li, Kazuki Kuga, Nguyen Dang Khoa, Kazuhide Ito

Healthy Building America 2021 2021.1

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Event date： 2021.1

Language：English Presentation type：Oral presentation (general)

Country：United States

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Professional Memberships

日本建築学会

Research Projects

生体流体力学から社会物理学を包含･統合した感染リスク評価手法の開発

Grant number：22K14371 2022 - 2024

日本学術振興会科学研究費助成事業若手研究

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Authorship：Principal investigator Grant type：Scientific research funding

Class subject

機械電気科学実験Ⅱ

2024.4 - 2024.9 First semester
機械電気科学実験Ⅱ

2023.4 - 2023.9 First semester
課題集約演習

2022.10 - 2023.3 Second semester
エネルギー工学実験

2022.4 - 2022.9 First semester
創造科学工学基礎実験

2022.4 - 2022.9 First semester
創造科学工学基礎実験

2021.10 - 2022.3 Second semester
課題集約演習

2021.10 - 2022.3 Second semester
エネルギー工学実験

2021.4 - 2021.9 First semester

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