According to Wikipedia, “Plagiarism is the wrongful appropriation and stealing and publication of another author’s language, thoughts, ideas, or expressions and the representation of them as one’s own original work.”
Plagiarism can be said to have clearly occurred when large chunks of text have been cut-and-pasted. Such manuscripts would not be considered for publication in JSEM. However, minor plagiarism without dishonest intent is relatively frequent, for example, when an author re-uses parts of an introduction from an earlier paper.
JSEM checks the originality of the manuscript using the plagiarism software tool called Turnitin. As part of this process, JSEM spot checks submitted manuscripts and compares with the CrossCheck database.