FIRST PAGE


 

 (1) DOMESTIC & INTERNATIONAL COOPERATION (Ү/)

          (Cooperated by Dr. Hyo Choi)

 

 Gangneung-Wonju National University, Wonju & Gangneung Campuses, Korea

        http://www.gwnu.ac.kr/

 

     Dr. Hyo Choi :

      - Dean of Graduate School

  

 Dean's Office at Wonju Campus(left), Gangneung Campus(center), Dept. of Atmospheric  Environmental Sciences(right), Gangneung-Wonju National University, Korea

 

 Staffs of Wonju & Gangneung Campuses of Gangneung-Wonju National University, Korea

 College of Environmental Science and Engineering, Peking University, China                       http://web5.pku.edu.cn/huanjing/AcademicTeam/zzjzg/

     Dr. Hyo Choi :

     - Guest Invited Professor

    

    Peking Universiy (Campus, Library), Beijing, China

 

  Peking University, Beijing (China)  (Graduation Ceremony, Atmospheric Cemistry Group(),   Beijing city - scenery)

 

 International Journal Editors:                           Peking University/Kangnung Natational University  JGR, JCE, MAP, AE, AR, FEOR, EI, IJEP,           Cooperative Research Group /  WASP, CDO, DA, IJWRM                                             ˰  ѨΡΡ ϼ (June 18, 2004)

 

 AOGS (Asia Oceania Geosciences Society), Singapore

          http://asiaoceania.org/

 

     Dr. Hyo Choi :

      - President (Atmospheric Science) -- 2005~2009

 

 IBC (International Biographical Center), United Kingdom(England)

         http://www.internationalbiographicalcentre.com/

     

    Dr. Hyo Choi :

     - Deputy Director General

 

  National Fisheries & Research Development Institute, Korea

        (East Sea Fisheries Research Institute, Korea)

          http://www.nifs.go.kr/page?id=en_index

  

      Dr. Hyo Choi :

      - Fishery Researcher (nominated by President of Korean Government)

 

Dept. of Mathematics & Statistics, University of New South Wales, Sydney, Australia

         http://www.unsw.edu.au/    

 

     O Dr. Milton Speer

 

  Dept. of Meteorological Engineering, Istanbul Technical University, Turkey

           http://www3.itu.edu.tr/~incecik

 

     O Dr. Selahattin Incecik

 

 Dept. of Mechanical and Energy , University of Northern Texas, USA

          http://www.mee.unt.edu/John/

 

      O Dr. John Kuruvilla

 

 Dept. of Oceanography, Naval Postgraduate School, USA

          http://www.nps.edu   

 

     O Dr. Peter Chu

 

 School of Environmental Sciences, University of East Anglia, UK(England)

           http://www.uea.ac.uk/~e490/www.htm   

 

      O Dr. Peter Brimblecombe

 

 Disaster Prevention Research Institute-Kyoto University, Japan

          http://ssrs.dpri.kyoto-u.ac.jp/~hp/index_en.html

 

      O Dr. Tetsuya Takemi

 

 College of Environmental Science and Engineering, Peking University, China

        http://web5.pku.edu.cn/huanjing/AcademicTeam/zzjzg/

 

      O Dr. Yuan Hang Zhang

    

 Advances in Geosciences, Vol. 5, Singapore

       http://www.worldscibooks.com/environsci/5913.html

 

     Dr. Hyo Choi :

      - Editor-in-Chief

  

International Journal of Environment & Pollution, United Kingdom (England)

         http://www.inderscience.com/browse/index.php?journalID=9&year=2009&vol=39&issue=3/4

 

    Dr. Hyo Choi :

     - Editor

 

 Advances in Geosciences, Vol. 9, Singapore

      http://www.worldscibooks.com/environsci/5913.html

 

     Dr. Hyo Choi :

      - Editor

 

The Open Atmospheric Science Journal, USA

         http://www.benthamopen.com/TOASCJ/editorial-board/

    Dr. Hyo Choi :

     - Editor

 

Disaster Advances, India

       https://www.worldresearchjournals.com/disasteredtboard.aspx

 

    Dr. Hyo Choi :

     - Editor

 

International Journal of Water Resources & Environment Engineering, Nigeria

         http://www.academicjournals.org/IJWREE/Email.htm

 

    Dr. Hyo Choi :

     - Editor

 

International Geoinformatics Research & Development Journal, Malaysia

      http://www.igrdg.com/IGRDJ%203.htm

 

    Dr. Hyo Choi :

     - Editor

  

Current Development in Oceanography, India

       http://www.pphmj.com/journals/cdo.htm

 

    Dr. Hyo Choi :

     - Editor-in-Chief

 

 (2) INTERNATIONAL CONFERENCES()  

       

  2nd AOGS (Asia Oceania Geosciences Society) 2005 Annual General Meeting

    (Conducted by Dr. Hyo Choi)

 

                 20-24 June, 2005, SINGAPORE, http://www.asiaoceania.org/council%202005.html

                                                                 http://www.asiaoceania.org

                                                                 (Nation: 43; Participant; 846; Paper; 1,060)

    2nd AOGS Annual Conference: Convenors &            2nd AOGS - Indian & Korean Delegates      

    Dr. Hyo Choi (2nd left) (June 23, 2005)                                    (June 24, 2005)

 

     Dr. Hyo Choi :

      - Vice President : AOGS (2005~2006) (Atmosphere Sciences)     

      - Convenors :  "Atmospheric Environment (A4)" & "Regional and Urban Climate (OA7)"

                                sessions of AOGS Meeting (2004~2005)

      - Editor-In-Chief : "Advances in Geosciences, Vol. 5", World Scientific Publishing Co.

     

 3rd International Symposium on Air Quality at Urban, Regional & Global Scales, 2005

     (Conducted by Dr. Hyo Choi)

 

          26-30 September, 2005, Instanbul, Turkey, http://web.deu.edu.tr/tuncap/aqm2005

     3rd AQM International Symposium (Istanbul, Turkey; Sept. 24~30, 2005).  

      - Blue Mosque,

      - Eminonu Harbor(Bosphorus)

      - Welcoming Address by Dr. Choi (Movenpick Hotel-Istanbul)

      - Scholars(Spain, England, Australia, Korea) (Banquet on the ship in Bosphorus Strait)

      - President(Dr. Mills)-IUAPPA & President(Dr. Choi)-AOGS(Atmospheric Sciences)

      - Korean delegates (Movenpick Hotel-Istanbul) 

      - Cheeze shop in Bazaar (Istanbul)

      - Near Bazaar

 

     Dr. Hyo Choi :

      - Co-President of AQM Symposium

      - International Scientific Committee Member

      - Guest Editor  - "Atmospheric Research"  (SCI index)

 

 3rd AOGS (Asia Oceania Geosciences Society) 2006 Annual General Meeting

     (Conducted by Dr. Hyo Choi)

 

          10-14 July, 2006, SINGAPORE,        http://www.asiaoceania.org/council%202006.html

                                                               (Nation: 43; Participant; 744; Paper; 844)

 

       - Abstract submission : 15 Feb., 2006

       -  Registration & Abstract - Fee waves application : 1 Feb., 2006

      -  Deadline of submitting a manuscript to be reviewed  for the publication on "Advances in 

              Geosciences, Vol. 11"  : End of October, 2006  

              (Each paper : with about 10 ~ 15 pages including one colorful page; Pubication: May, 2007)

 

    3rd AOGS Annual General Meeting (Singapore; July 10 ~ 14, 2006)

      - Overview of Singapore

      - Suntec city (Conference place of AOGS, Singapore)

      - Scholars (USA, Taiwan, Japan, Germany, etc.) (Banquet at Tanglib Club)

      - Scholars (India, Korea) (on the corridor of Suntec conference rooms)

 

     Dr. Hyo Choi :

        - President (2006~2008) : AOGS (Atmsopheric Sciences)

       - Convenor : "Atmospheric Environment - AS13", AOGS2006 Meeting

        - Editor-In-Chief : "Advances in Geosciences, Vol. 5", World Scientific Publishing Co.     

 

        Secretariats : Dr. Milton Speer (University of New South Wales, Australia)

                         -  Dr. Yuan Hang Zhang (Peking University, China)         

                                 -  Dr. Jai-Ho Oh (Pukyong National University, Korea)          

                                 -  Dr. Kazuhisa Tsuboki (Nagoya University, Japan)      

                                -  Dr. Ujjaini Sarkar (Jadavpur University, India)

 

 4th AOGS (Asia Oceania Geosciences Society) 2007 Annual General Meeting

     (Conducted by Dr. Hyo Choi)

 

          30 July ~ 3 August, 2007, BangkokThailand       http://www.asiaoceania.org/council%202007.html

                                                                                    (Nation: 49; Participant; 1,093; Paper; 1,172)

 

       - Session proposal submission : End of Oct., 2006

      - Abstract submission : Feb., 2007

       - Registration & Abstract - Fee waves application : Feb., 2007

       

      Dr. Hyo Choi :

       - President (2006~2008) : AOGS (Atmsopheric Sciences)

       - Convenor : "Atmospheric Environment & Pollution-11", AOGS2007 Meeting

       - Editor : "Advances in Geosciences, Vol. 9", World Scientific Publishing Co. 

 

        Secretariats : Dr. Milton Speer (University of New South Wales, Australia)

                         -  Dr. Yuan Hang Zhang (Peking University, China)         

                                -  Dr. Jai-Ho Oh (Pukyong National University, Korea)          

                                -  Dr. Kazuhisa Tsuboki (Nagoya University, Japan)      

                               -  Dr. Ujjaini Sarkar (Jadavpur University, India)

 

 5th AOGS (Asia Oceania Geosciences Society) 2008 Annual General Meeting     

       (Conducted by Dr. Hyo Choi)

 

         16~20 June, 2008, BusanKorea    http://www.asiaoceania.org/aogs2008/

                                                              (Nation: 52; Participant; 1,627; Paper; 1,704)

        - Session proposal submission : End of Oct., 2007

       - Abstract submission : 07 Feb., 2008

        - Registration & Abstract - Fee waves application : 07 Feb., 2008

 

    O Dr. Hyo Choi :

    - President (2006~2008) : AOGS (Atmsopheric Sciences) - du8392@hanmail.net  

                        ( http://www.asiaoceania.org/society/officebearer07.htm )

    - Convenor : "Atmospheric Environment & Pollution-10", AOGS2008 Meeting

       

        Secretariats : Dr. Milton Speer (University of New South Wales, Australia)

                         -  Dr. Yuan Hang Zhang (Peking University, China)         

                          -  Dr. Jai-Ho Oh (Pukyong National University, Korea)          

                              -  Dr. Kazuhisa Tsuboki (Nagoya University, Japan)      

                           -  Dr. Ujjaini Sarkar (Jadavpur University, India)   

    5th AOGS Annual General Meeting (Busan, Korea; June 16 ~ 20, 2008)

    - Overview of BEXCO conference place

    - Dr. Choi conferred an award to Dr. Rho, distinguished lecturer (AS Section of AOGS)

    - Scholars (Dr. Choi, Young scientist-China) (Banquet at BEXCO main Hall, 7/16)

    - Scholars (Dr. Choi, Macau, USA, Hong Kong, Hong Kong) (Banquet at BEXCO main Hall, 7/16)

    - Scholars (Turkey, Dr. Choi, USA) (in conference room, BEXCO)

    - Scholars (Dr. Choi, Macau, Canada, Canada, Singapore, Canada) (front gate of BEXCO; 7/19)

    - Scholars (Dr. Choi, China, Singapore, Japan, USA) (Banquet on crusier in Busan Harbor; 7/19)

    - Scholars (Singapore, Dr. Choi, Japan, Japan, Korea, Japan) (Banquet on crusier; 7/19)

    - Scholars (Dr. Choi, USA, Macau) (Banquet on crusier; 7/19)

    - Scholars (Taiwan, Dr. Choi, Taiwan, Taiwan) (Lunch in Gang Anri Beach, Busan; 7/20)

    - Scholars (Japan, Canada, Dr. Choi, Canada, Japan, Japan, Korea, Canada, Canada,

                   Singapore, Canada) (Banquet on crusier; 7/19)

    - Scholars (Turkey, Turkey, Turkey, Korea, Turkey) (Lunch in Gang Anri Beach, Busan; 7/19)

 

2nd Wokshop on Mega City & Regional Air Pollution

 

        18~19 January, 2008, Gangzhou, China

 

    Views of workhop at Gangzhou.  Scenery of Museum at Gangzhou and Guileen in Wunan

     Province.

 

The 4th PEACE (Program of the East Asian Cooperative Experiments) Ocean Science       Wokshop

 

        17~19 September, 2008, Vladivostok, Russia

 

    Views of PEACE Ocean Workshop at Russian Oceanographical Institute.  Scenery of Vladivostok     harbor, Russian church and Armenian restaurant at Vladivostok,  5th PEACE Workshop will be     at Gangneung-Wonju National University, Gangneung city, Republic of Korea on Sept. 11 - 12,     2010.      

 

EMECS-8 (Environmental Management of Enclosed Coastal Seas)

 

        24~30 October, 2008, Shanghai, China

 

    Views of EMECS conference.  Dr. Choi presented his paper and joined in the conference as      research group memebr and adviser at council meeting      

 

PORSEC2008 (9th Pan Ocean Remote Sensing Conference)

 

        2~6 December, 2008, Gangzhou, China

 

   Views of PORSEC Conference (Dr. Choi presented 4 papers) and night scenery near Peral River.

 

7th International Conference on Air Quality - Science & Application (AQ2009)

 

        2~6 March, 2009, Istanbul, Torkey http://www.airqualityconference.org/conference_committee.html

 

     Dr. Hyo Choi :

      - International Scientific Committee Member

 

3rd International Conference on Health GIS 2009

 

       24~26 July, 2009, Hyderabad, India  http://e-geoinfo.net/healthgis2009/

 

     Dr. Hyo Choi :

       - Keynote Speaker : Health GIS 2009, July 25, 2009 (Hyderabad International Convention Center)

 

    Health GIS conference at Hyderabad International Convention Center, India. Views of Conference

    (Dr. Choi was a Keynote Speaker), Indian Dancing and Golkonda Fort

 

  6th AOGS (Asia Oceania Geosciences Society) 2009 Annual General Meeting

     (Conducted by Dr. Hyo Choi)  

 

         11-15 August, 2009, Singapore   http://www.asiaoceania.org/aogs2009/ 

                                                          (Nation: 52; Participant; 1,149; Paper; 1,226)

 

         - Session proposal submission : 1st of December, 2008

        - Abstract submission : 30 March, 2009

         - Registration & Abstract - Fee waves application : 15 March, 2009

 

    O Dr. Hyo Choi

    - Vice President - AOGS (2008~2009) () - du8392@hanmail.net  

 

        ( http://www.asiaoceania.org/society/officebearer07.htm )

     - Convenor - "AS10-Atmospheric Environment & Pollution" Session, AOGS2008 Meeting

   AOGS conference at SUNTEC international convention center at Singapore. Dr. Choi acted as Vice    President (2008-2009) at Atmospheric Science Section (AS) of AOGS.  He acted as President    (2006-2008) and Vice-President (2005-2006) at Atmospheric & Oceanic Section.  At a Chinese    restaurant with Dr. Choi, Japanese and Canadian scientists.  Dr. Choi and Indian scientists at    SNTEC conference place.

 

5th European Conference on Severe Storms (ECSS 2009)

 

       12~16 October, 2009, Landshut, Germany  http://www.essl.org/ECSS/2009

  

  Dr. Hyo Choi is in just rightt side of photo center.  ECSS2009 was held at Stadt Theather (Landshut),

  Germany.  Banquet was at the same place.

      

 5th PEACE/CREAM-AP (EAST- II) 2010 International Ocean Workshp

 

       11~12 Septembet, 2010, Gangneung, Korea  http://atmos.kangnung.ac.kr/ch/peace2010

 

     Dr. Hyo Choi :

       - Organizing Chair : PEACE2010 Wokshop, Gangneung-Wonju National University (Gangneung)

 

   - PEACE Conference place: Gangneung-Wonju National University at Gangneung campus, Korea

    - Seashore near the university

      - Coastal sea near the university

      - Kyungpo lake and beach near the university

 

    - PEACE Conference place: Gangneung-Wonju National University at Gangneung campus, Korea

    - Conference place in Life Science Building, Room 103 of GWNU

     - Japanese presenter and Coffee Break

    - Banquet at a resturant-"Gowan" in the downtown of Gangneung city  

 

    - National Part-Mt. Sorak in Sokcho  city, 70km away from Gangneung city to the north

     - Kyungpo lake near Gangneung-Wonju National University, Gangneung city, Korea

     - Kyungpo beach street of "Sashimi Resturants and Kyungpo beach of the right of Kyungpo Lake

     

 1st International Conference on Managing Ecosystem Health of Tropical Seas:

                  Environmental Management of Coastal Ecosystem

 

       19~21 October, 2010, Putrajaya, Malaysia  http://ibs.upm.edu.my/~ecoseas/committee.html

     Dr. Hyo Choi :

       - Scientific Committee Member

 - Conference place: Marriott Putrajaya Hotel (Dr. Hyo Choi-left and right)

 - Traditional resturant-"Sa Zoma"-Kuala Lumpure (Dr. Choi-Right in left photo) & Dances (right)

 

4th Air Quality Management at Urban, Regional and Global Scales

    & 4th International Symposium and IUAPPA Regional Conference

(

       10~13 September, 2012, Istanbul, Turkey  http://aqm2012.itu.edu.tr/

     Dr. Hyo Choi :

       - Scientific Advisor

- Conference place: Istanbul Technical University (ITU) (Dr. Choi-center) & Dr. Lee and Dr. Choi

- Topaz Palace, Istanbul (Dr. Choi & Dr. Lee) & Garden party at Branch Campus of ITU

- Aya Sophia (Istanbul; Dr. Lee) & Dr. Lee and Dr. Choi at Traditional resturant in Istanbul

 

10th General Assembly of Asia-Oceania Geoscioence Society (AOGS 2013)

 

       24~28 June, 2013, Brisbane, Australia  

         http://www.asiaoceania.org/aogs2013/public.asp?page=GE_results.htm

           (Nation: 47; Paper; 1,300)

 

     Dr. Hyo Choi :

       - Session Head Convenor-(AS21-Air Quality Modeling and Monitoring and Health Impacts)

 

- Conference place: AS-21 Session Key Members (Brisbane Convention Centre) & Scenes in Brisbane.

 

ICCE 2013-International Conference on Chemistry & Environment

 

       8~10 July, 2013, Antwerp, Belgium    http://www.chemenviron.net/BoardofMember.php

           (Nation: 20; Paper; 225)

 

     Dr. Hyo Choi :

       - Session Head Chair

       - Editor, Research Journal of Chemistry & Environment (SCIE)

- Indian presenters and Dr. Choi at Antwerpen University (Conference place) & Building in the campus

- Presentation by Dr. Choi & Indian presenters

- Antwerpen Railway Station & Banquet on the 4th floor of reception building in the university

- Historical street of Antwerpen (Dr. Choi) & Resturants beside Antwerpen Station near Reonardo Hotel

 

BIT-2nd WCMB-2013 Annual World Congress of Marine Biotechnology

 

       23~25 September, 2013, Hangzhou, China   http://www.bitcongress.com/WCMB2013/

           

      Dr. Hyo Choi :

      - Keynote Speaker

       - Session Chair

 

Zhejiang Ocean University-Zhoushan

 

       24~26 September, 2013, Zhoshan, China  http://www.zjou.edu.cn/

           

      Dr. Hyo Choi :

      - Invited Speaker

      - Adjunct Professor

 - Scenes of Zhejiang Ocean University & Library (message: Welcome Korean Professional Scientist)

 - Slogan of Zhejiang Ocean University (Today, why do you attend university?, How about your study?

     After graduation, Do you prepare what you will do?) & Parts of campus

 - Certificate of Adjunct Professor issued by President of Zhejiang Ocean University on Sept. 25, 2013

     (Dean, Deng Yibing and Dr. Choi) & Professors (School of  Marine Sciences: Dr. Choi-Centre) &

     Special lecture by Dr. Choi to Professors and Graduate Students.

 - Pu De Si (Temple with lotus) near Tea Shop of famous "Lotus leaf tea" & Key Staffs of the University

 

2014 International Conference on Environmental Disaster Management & Prediction

                                                             ( ICEDMP 2014 )

       18~20 August, 2014, Gangneung, Korea,   http://atmos.gwnu.ac.kr/ch/ICEDMP2014

           

    Dr. Hyo Choi :

     - President of Oganizing Committee

      - Keynote Speaker

      - Editor-in-Chief:

 - ICEDM 2014 Conference place, Gangneung-Wonju National University, Basic Education Center 222

 - Party for Prof. Hyo Choi's Retirement (Korea, Australia, India, Thailand, China, Japan, Russia)

 - Prof. Chois' family

 - Banquet at Kyungpo Beach Raw Fish Restaurant (Korea, Australia, India, China, Japan)

 - Banquet at Nul-bom-gongwon Bulgoki Restaurant inside Gangneung City (Korea, Australia, India,     China)

 

BIT's 4th WCMB-2014, Annual World Congress of Marine Biotechnology-2014

 

       16~18 October, 2014, Dalian, China   http://www.bitcongress.com/wcmb2014/program-Track1.asp

           

     Dr. Hyo Choi :

      - Advisory Board Members : WCMB-2014

       - Keynote Speaker

       - Chair, Track 1: Marine Biogeochemistry

 

 - Conference place: Dalian International Convention Center (near Dalian Habor) (1st line of photo)

 - BIT's 4th Annual World Congress of Marine Biotechnology 2014 was held (2nd line of photos).

    Dr. Choi was Advisort Board Meamber of WCMB and Chair of Track 1-Marine Biogeochemistry

    (left - Chair (Dr. Choi) and right - Speakers of Biogeochemistry Session).

 - Annual World Congress (left of 3rd line of photos) and Dr. Mohamed & Dr. Choi

 - Dalian city (left of 4th line) and Exhibition boots (right)

 

5th International Symposium on Remote Sensing of Indian Ocean-South China Sea 

     & Typhoon Sciences

 

       24~25 August, 2015, Gangzhou, China   http://lingzis.51.net/Typhoon2015/speakers.htm

           

     Dr. Hyo Choi :

      - Invited Speaker       

 - 1-1) 5th IOSCS Symposium Opening Ceremony (Place): Gangdong University of Foreign Studies (Left):            (Participants--USA, Italy, India, Sri Lanka, Nepal, Pakistan, Korea, China, Japan, Mianma, etc.)

 - 1-2) Dr. Choi's Speech (Right)

 - 2-1) Participants in the opening of symposium (Left)

 - 2-2) Dr. Choi's interview (center) with "Gangdong TV News" on Typhoon Forecasating (right)

 - 3-1) Memorial photo with participants in the symposium (left)

 - 3-2) Pearl river nighttime boat trip with some of committee members (right)

 - 4-1) Restaurent street of Gangzhou city -Committee Members (Mianma, Sri Lanka, Nepal, Italy, Korea,

           China, Pakistan) (left)  

 - 4-2) Social meeting with some Committee members (Italy, China, Korea, Pakistan, Japan, Nepal,

           Mianma) at a Chinese restaurent (Dr. Choi - 2nd from the right in the first row).

 - 5-1) Dr. Choi on the front gate of Namhwa Chen Temple in Gangdong Province, China (right)

 - 5-2) Main building inside "Namhwa Chen Temple" as the famous Chen Temple of China (right).      

 

ICESB 2015 (5th International Conference on Environmental Science &

      Biotechnology

             9~11 November, 2015, Jinju, Korea    http://www.icesb.org/index.html

      

    Dr. Hyo Choi :

     - Chair of Technical Committee

      - Keynote Speaker  

- The 5th 2015 ICESB International Conference (Place) : Kyungsang National University (Jinju, Korea)

     (left). (Participants -- USA, China, Japan, India, Indonesia, Malaysia, Thailand, Mianma, Korea, etc.)

- Key participants in the conference (right upper)

- Dr. Choi confer "Best Presentation Award" to a speaker (right bottom)

   

 

Arirang TV (UPFRONT Ep88) Discussi on "Strategies for the New Climate Regime"--

    COP21 Paris Agreement (Nov. 30~Dec. 12, 2015; France) to UNFCCC (United Nation

                                 Framwork Comversion on Clmate Change)

 

      10 December, 2015, Seoul, Korea

 

   O Dr. Hyo Choi :

   Debater (in English)    

   - Director General, Atmospheric & Oceanic Disaster Research Institute

   - Dean, Gangneung-Wonju National Universty (2009~2011; 2011~2012)

   - President, Korea Environmental Sciences Society (2002~2003)

   - Senior Researcher, Korea Advanced Institute of Science & Technology (KAIST), Korea Ocean       Research & Development Institute (KORDI) (Korean Government Invited Overseas Scientist)       (1984~1988)  

 

     https://youtu.be/7DwNeG6Qa7U