Q: I revised the paper submitted to the journal and submitted it to the conference.

Hi, thank you for assisting the researchers. I have a question regarding the following scenario:

• Paper A: Published in the journal in June 2012 (Author: a, b, c, d)
• Paper B: Published in the conference proceedings in October 2012 (Author: a, b, c)

Percentage of sentence matches (suspected plagiarism) between papers A and B: 73-79%.

In Paper B, at the bottom of page 1, the author acknowledges that it was developed from Paper A.

[Question] My primary concern is determining whether plagiarism occurred between Papers A and B. To establish this, I believe it is important to ascertain whether these two papers are the same or different.

I referred to the information provided by Editage(https://www.editage.co.kr/insights/general-flows-in-terms-of-different-submissions-types), which states that revising a conference paper based on feedback and submitting it to a journal is considered the same paper. However, submitting a paper published in a journal to an academic conference may be seen as duplicate submission.

Based on this information, my initial inclination is to consider it a case of duplicate submission since the paper was initially published in the journal and then submitted to the conference.

Furthermore, even though Paper B acknowledges that it was developed from Paper A, if duplicate submission is regarded as research misconduct, the statement of "development from Paper A" would become invalid, potentially constituting plagiarism.

Additionally, the reduction in the number of authors from 4 to 3 raises concerns regarding authorship.

To assess the similarity between the two papers, I conducted a plagiarism check using Copykiller, a Korean paper plagiarism detection program, which indicated a similarity of 73-79%.

In light of these factors, I would like to determine whether the two papers can be considered cases of plagiarism.