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Research article is a scholarly paper that presents the results of an original study (experiments, observations, surveys, modeling, etc.) conducted by its author(s). It contributes new findings to a specific field of knowledge that support the solution of novel scientific or scientific and technological problems, rather than summarizing existing information.
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Theoretical article is a scholarly paper that presents the results of an original study conducted by its author(s). It advances hypotheses, conceptual ideas, and arguments in support of scientific claims, provides an in‑depth analysis and theoretical elaboration of existing concepts, identifies new regularities, and formulates problem situations in particular field for further consideration by other researchers.
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Applied research article elucidates theoretical foundation required to address a specific, practical challenge. It confirms scientific validity through rigorous experimentation identifying new phenomena or establishing significant regularities. By analyzing original empirical data and demonstrating a practical, effective solution to a well‑defined problem, the authors bridge the gap between theory and practice.
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Review article a scholarly paper that examines and discusses research conducted by other scientists in the same or related fields. Writing such an article allows the author(s) to collect and organize relevant literature, perform rigorous comparative analysis, and present a coherent synthesis of existing findings.