Archives

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  OPSI - June 2025

  Vol. 18 No. 1 (2025)

  This issue contains articles from different countries such as Ecuador, New Zealand, United Kingdom, Hungary, China, Malaysia, United Arab Emirate, and Indonesia.

   

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  ISSN 1693-2102

  Vol. 17 No. 2 (2024)
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  ISSN 1693-2102

  Vol. 17 No. 1 (2024)
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  ISSN 1693-2102

  Vol. 16 No. 2 (2023)
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  ISSN 1693-2102

  Vol. 16 No. 1 (2023)
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  ISSN 1693-2102

  Vol. 15 No. 2 (2022)
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  ISSN 1693-2102

  Vol. 15 No. 1 (2022)
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  ISSN 1693-2102

  Vol. 14 No. 2 (2021)
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  ISSN 1693-2102

  Vol. 14 No. 1 (2021)
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  ISSN 1693-2102

  Vol. 13 No. 2 (2020)
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  ISSN 1693-2102

  Vol. 13 No. 1 (2020)
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  ISSN 1693-2102

  Vol. 12 No. 2 (2019)
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  ISSN 1693-2102

  Vol. 12 No. 1 (2019)
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  ISSN 1693-2102

  Vol. 11 No. 2 (2018)
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  ISSN 1693-2102

  Vol. 11 No. 1 (2018)

   
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  ISSN 1693-2102

  Vol. 10 No. 2 (2017)

  
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  ISSN 1693-2102

  Vol. 10 No. 1 (2017)

  

   

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  ISSN 1693-2102

  Vol. 9 No. 2 (2016)
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  ISSN 1693-2102

  Vol. 9 No. 01 (2016)