HOME ＞ PUBLICATIONS
Current State
As of Jun. 11th, 2024
6 Peer-reviewed Papers，8 International Conferences，9 National Conference，12 Awards & Grants
Interested parties can find there following papers from ResearchGate or Google Scholar (see the bottom of this web-page).
If these are not accessible, please contact me ．
Current Papers
None
Peer-reviewed Papers (Japanese)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi:
Optimization of Water Supply Pipe Replacement Planning to Minimize Life Cycle Cost Including Seismic Risk ―a Proposal for an Evaluation Method Using Multi-Event Model―
, Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.75, No.7, pp.Ⅲ_73-Ⅲ_84, 2019.
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi:
Impact of Firefighting Capacity on Water Distribution Systems Design Using Genetic Algorithm,
Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.75, No.6, pp.Ⅱ _209-Ⅱ _218,2019.
Kohei Hasegawa , Yasuhiro Arai, AKira Koizumi:
Optimization of Water Supply Pipe Replacement Planning to Minimize Life Cycle Cost by Using Genetic Algorithm
, Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.74, No.6, pp.Ⅱ_275‒Ⅱ_286, 2018.
(JSCE 2019 Young Researcher Award)
Kohei Hasegawa , Yasuhiro Arai, AKira Koizumi,Tatusya Terai, Jun Iide, Michihide Shinonaga：
A Study of water main replacement planning within a context of depopulation —quantitative analysis of redundancy through trunk water main duplication and water supply interconnection by using pipe in pipe method—
, Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.73, No.6, pp.Ⅱ_109-Ⅱ_120, 2017.
Kohei Hasegawa , Yasuhiro Arai, AKira Koizumi:
A Review of Social Discount Rate for Life Cycle Assessment of Water Distribution Systems
, Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.72, No.6, pp.Ⅱ_205-Ⅱ_216, 2016.
Yasuhiro Arai, Kohei Hasegawa , Sho Abe, AKira Koizumi, Toyono Inakazu:
Life-cycle Costs and Life-cycle CO2 Emissions of a Water Distribution Network —Analysis Based on Differing Life Cycles for Water Pipe and Pump—, Journal of Japan Society of Civil Enginners, Series G (Environmental Research) , Vol.71, No.6, pp.Ⅱ-377-Ⅱ-386, 2015.
Peer-reviewed Papers (English)
List Pending
International Conferences
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi: Accounting for Seismic Risk in LCC-Based Pipe Replacement Planning of Water Distribution Systems, 17th International Computing & Control for the Water Industry Conference (CCWI) ，Presentation No.36, Exeter, United Kingdom, 1-4 Sep. 2019.(Oral)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi, Takaharu Kunizane, Kimiko Yamazaki: Life Cycle Cost-based Pipe Replacement Model: Inclusion of seismic hazard using earthquake catalog, Seoul-Tokyo Forum 2019 , Seoul, South Korea, Sep. 2019, pp.117-129. (Oral)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi:
Application of Island Model Genetic Algorithm for Minimum
Cost Design of Water Distribution System,
The 11th International Symposium on Water Supply Technology , OP2-3,
Yokohama,Japan, July 2019, pp.224-231.(Oral)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi:
Life Cycle Cost-based Pipe Replacement Model and Application in Depopulation Scenario
, 1st International WDSA/CCWI Joint Conference , Ontario, Canada, Paper No. 110, July 2018.(Oral)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi: Life Cycle Cost-based Pipe Replacement Model: Case Study in Depopulation Scenario,
Seoul-Tokyo Forum 2018 , Tokyo, Japan, May 2018, pp.12_1-12_4. (Oral)Akira Koizumi, Yasuhiro Arai, Kohei Hasegawa : An Analysis of Water Pipeline Upgrading Plans in a Society Facing Population Decline:
-Focusing on PIP Cost and System Interconnecting Pipeline Length-,
Seoul-Tokyo Forum 2017 , Seoul, South Korea, May 2018, pp.27-38. (Oral)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi, Toyono Inakazu:
Life cycle assessment of a water distribution system in a context of depopulation,
IWA World Water Congress and Exhibition 2016 , Poster No.296, Brisbane, Australia, October 2016．(Poster)
Kohei Hasegawa , Yasuhiro Arai, Akira Koizumi, Toyono Inakazu:
Life cycle assessment of a water simulated water supply network，
Seoul-Tokyo Forum 2015 , Seoul, South Korea, May 2015, pp.217-232. (Oral)
Japanese National Conferences
Japanese Title Only. See Japanese site.
Survey and Overview Papers
List Pending
Awards and Grants
Awards
Association Of Water And Sewage Works Consultants Japan, Outstanding Achievement Award, June 2024.
Association Of Water And Sewage Works Consultants Japan, Best Presentation Award, July 2023.
Japan Society of Civil Enginners (JSCE), Young Researcher Award 2019, October 2019.
Japan Statistical Association Student Essay Contest 2015 -Silver Prize-, November 2015
Japan Civil Engineering Consultants Association(JCCA) Student Essay Contest 2014 -Bronze Prize-, April 2015.
(link)
Commendation for Special Achievement (NRI Essay Bronze Prize) -Nihon University-, March 2015
Nomura Research Institute (NRI) Student Essay Contest 2014 -Bronze Prize-, November 2014
Commendation for Special Achievement (JVMA 60th Anniversary Essay Bronze Prize) -Nihon University-, March 2014
Japan Valve Manufacturers' Association (JVMA) 60th Anniversary Student Essay Contest -Bronze Prize-, Feburary 2014
Grants (Scholarships)
Repayment Exemption for Students with Excellent Grades, Japan Student Services Organization (JASSO) Type I (interest-free) Scholarship (Exemption of all loan).) :1.80 mil JPY, April 2017.
Hisao Iwai Memorial Tokyo Scholarship Fund : 4.32 mil JPY, April 2017.
Ueda Memorial Foundation: 0.64 mil JPY, April 2015.
Theses
Social Activities
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(Digest movie)