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H-index, or H index, is a widely used quantitative measure to assess the influence and productivity of a scientist, based on both the number of publications and the number of citations those publications receive. First proposed in 2005 by physicist Jorge E. Hirsch at the University of California, San Diego, the H-index quickly became a standard tool for evaluating academic achievement, especially in the natural sciences. Sometimes, this index is also referred to as the Hirsch index or Hirsch number.

Digital Object Identifier (DOI) plays an increasingly crucial role in identifying and managing scholarly research works. This article provides a detailed overview of DOI, from its structure and benefits to creation guidelines, helping researchers, publishers, and scientific journals understand and apply it effectively.

A DOI is a unique string of characters, created by the International DOI Foundation, used to permanently identify a digital object, such as a scientific article, book, book chapter, research data, or digital artwork. DOI adheres to ISO standards and ensures persistent access even when the URL of the document changes.

A researcher identifier (Researcher ID) is a unique string of numbers or characters that automatically links scientists to their research works. It helps distinguish authors with identical names or those who change affiliations, ensuring accuracy in recognizing scientific contributions. Using identifiers offers many practical benefits for researchers, research organizations, and funding agencies.

The G-index is a metric that measures the impact of a scientist, based on the number and citations of their research works. Proposed by Leo Egghe in 2006, the g-index is considered an improvement over the h-index, addressing some of its limitations.

References play a crucial role in any scientific research work. They are a collection of information sources used to strengthen, prove, and clarify arguments and research findings. These sources can include books, scientific journal articles, theses, conference proceedings, specialized websites, online data, and even non-textual sources such as images, videos, or research databases. The accurate use of references not only ensures transparency and allows readers to verify information but also demonstrates professionalism, respect for previous authors, and avoids issues related to plagiarism in science.

In the realm of scientific research, the proper use and citation of references not only demonstrate respect for intellectual property but are also crucial in affirming the accuracy, transparency, and value of a scholarly work. In this article, Health & Aging Journal will provide detailed guidance on references, from basic concepts and common styles to presentation methods and supporting tools, particularly useful for Vietnamese authors seeking to publish research in reputable journals.

In the world of scientific research, especially in the fields of Biomedical and Health - Aging, communicating results clearly, logically, and effectively is of paramount importance. The IMRAD structure has emerged as a widely accepted international standard, helping scientists present their work systematically and accessibly. This article by Health and Aging Journal will provide a comprehensive overview of IMRAD, from its basic concepts to detailed guidance on each component, aiming to support Vietnamese authors in developing high-quality scientific articles that meet international publication standards and those of the Journal.