It is with great sadness that we have just learned of the death of Nguyen Quoc Son, a professor emeritus and researcher at Ecole Polytechnique in Palaiseau, France, and a member of the Editorial Board of the Vietnam Journal of Mechanics, at the age of 77.
Types of Contribution
Contributions falling into the following categories will be considered for publication: Original research papers, Short Communication, and Review Paper.
Authors are advised that papers whose contribution is not concerned with fundamental issues in mechanics are not normally accepted; such material should be directed to more appropriate publications.
The maximum length of the Original research papers is 10 pages, of Short Communication is 06 pages, and of the Review Paper is 20 pages, including figures, tables, and references. Special cases will be decided by the Editor.
Submission declaration and verification
Submission of an article implies that the work described has not been published previously (except in the form of an abstract or as part of a published lecture or academic thesis or as an electronic preprint.
It is not under consideration for publication elsewhere, that its publication is approved by all authors and tacitly or explicitly by the responsible authorities where the work was carried out, and that, if accepted, it will not be published elsewhere in the same form, in English or any other language, including electronically without the written consent of the copyright holder.
Authors should aim to produce a manuscript that can be reviewed on its own, without assuming that earlier or later parts will be published. The Editors strongly encourage authors considering the submission of multiple papers (e.g., Part I, Part II, etc.) to instead combine them into one paper - in such cases this is a common recommendation of the reviewer(s). Alternatively, authors may choose to submit the respective parts sequentially, once the outcome of the review of the earlier manuscript is known.
Each author is required to declare his or her individual contribution to the article: all authors must have materially participated in the research and/or article preparation, so roles for all authors should be described. The statement that all authors have approved the final article should be true and included in the disclosure.
Please write your text in good English (American or British usage is accepted, but not a mixture of these). Submission to this journal proceeds totally online, and you will be guided stepwise through the creation and uploading of your files. The system automatically allocates ID code for your files, which is used in the peer-review process.
You may choose to submit your manuscript as a single Word or PDF, or Latex file to be used in the refereeing process. Use the following guidelines to prepare your article. Via the homepage of this journal (https://vjs.ac.vn/index.php/vjmech) you will be guided stepwise through the creation and uploading of the various files. Please keep source files safe as they are needed for further processing after acceptance. All correspondence, including notification of the Editor's decision and requests for revision, takes place by e-mail and via the author's homepage, removing the need for a hard-copy paper trail.
Each paper submitted for publication is normally subject to review and criticism by two independent, anonymous referees, and authors are provided with copies of these reviews so that they can make revisions and improvements to their manuscripts before publication. The normal time limit for the submission of an author's revised manuscript is three months; revised manuscripts received after this time may be considered as new submissions and subject to full re-review.
Manuscripts must be prepared following the order: Title, Authors, Affiliations, E-mails of the all author, Abstract, Keywords, Introduction, Main Text, Conclusion, Acknowledgments, References, and Appendix.
Title: Concise and informative. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible.
Author names and affiliations: Where the family name may be ambiguous (e.g., a double name), please indicate this clearly. Present the authors' affiliation addresses (where the actual work was done) below the names. Indicate all affiliations with a lower-case superscript letter immediately after the author's name and in front of the appropriate address. Provide the full postal address of each affiliation, including the country name and, if available, the e-mail address of each author.
Corresponding author: Clearly indicate who will handle correspondence at all stages of refereeing and publication, also post-publication. Ensure that phone numbers (with country and area code) are provided in addition to the e-mail address and the complete postal address. Contact details must be kept up to date by the corresponding author.
Abstract: A concise and factual abstract is required. The abstract should state briefly the purpose of the research, the principal results, and major conclusions. An abstract is often presented separately from the article, so it must be able to stand alone. For this reason, References should be avoided but if essential full publication details should be given. Also, non-standard or uncommon abbreviations should be avoided, but if essential they must be defined at their first mention in the abstract itself.
Keywords: Immediately after the abstract, provide a maximum of 6 keywords, using American spelling and avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). Be sparing with abbreviations: only abbreviations firmly established in the field may be eligible. These keywords will be used for indexing purposes.
Introduction: State the objectives of the work and provide an adequate background, avoiding a detailed literature survey or a summary of the results
Subdivision - numbered sections: Divide your article into clearly defined and numbered sections. Subsections should be numbered 1.1 (then 1.1.1, 1.1.2, ...), 1.2, etc. (the abstract is not included in section numbering). Use this numbering also for internal cross-referencing: do not just refer to 'the text'. Any subsection may be given a brief heading. Each heading should appear on its own separate line.
Units: Follow internationally accepted rules and conventions: use the international system of units (SI). If other units are mentioned, please give their equivalent in SI.
Math formulae: In principle, variables are to be presented in italics. Equations are center-align and equation number at right-hand margin (see Eq. (1)). MathType or the Microsoft equation editor can be used and the resulting graphics inserted into the text at the required indentation. Use abbreviation Eq. and Eqs. (e.g. Eq. (1)) to cite equation(s) in the text.
Figures: Each figure is numbered and inserted in the text after the first reference to it. Number the figures consecutively (e.g., Fig. 1, Fig. 2, etc.). Figure parts should be denoted by lowercase letters (a, b, c, etc.). Please do not supply figures that are too low in resolution. Ensure that each illustration has a caption. A caption should comprise a brief title (not on the figure itself) and a description of the illustration. Keep text in the illustrations themselves to a minimum but explain all symbols and abbreviations used.
Tables: Tables are placed close to the first time they are referred to in the text. Place the caption above the table. Number the tables consecutively (e.g., Table 1, Table 2, etc.). Number tables consecutively in accordance with their appearance in the text. Place footnotes to tables below the table body and indicate them with superscript lowercase letters. Avoid vertical rules. Be sparing in the use of tables and ensure that the data presented in tables do not duplicate results described elsewhere in the article.
Abbreviations: Abbreviations that appear in the abstract and the body of the text should be defined when they first appear. Ensure consistency of abbreviations throughout the article.
Results: Results should be clear and concise.
Discussion: This should explore the significance of the results of the work, not repeat them. A combined Results and Discussion section is often appropriate. Avoid extensive citations and discussion of published literature.
Conclusions: The main conclusions of the study may be presented in a short Conclusions section, which may stand alone or form a subsection of a Discussion or Results and Discussion section.
Acknowledgments: Collate acknowledgments in a separate section at the end of the article before the references and do not, therefore, include them on the title page, as a footnote to the title or otherwise. List here those individuals who provided help during the research (e.g., providing language help, writing assistance or proofreading the article, etc.) Funding sources may be acknowledged here, as well as individuals who provided help during the research and writing stages of the work.
Citation in text: Please ensure that every reference cited in the text is also present in the reference list (and vice versa). Any references cited in the abstract must be given in full. Unpublished results and personal communications are not recommended in the reference list but may be mentioned in the text. If these references are included in the reference list they should follow the standard reference style of the journal and should include a substitution of the publication date with either 'Unpublished results' or 'Personal communication'. Citation of a reference as 'in press' implies that the item has been accepted for publication. Where applicable, author(s) name(s), journal title/book title, chapter title/article title, year of publication, volume number/book chapter, and the pagination must be present. Use of DOI is highly encouraged. References in languages other than English must be referred to by an English translation (with the original language indicated in parentheses).
Reference formatting: There are no strict requirements on reference formatting at submission. References can be in any style or format as long as the style is consistent. Where applicable, author(s) name(s), journal title/book title, chapter title/article title, year of publication, volume number/book chapter, and the pagination must be present. Use of DOI is highly encouraged. The reference style used by the journal will be applied to the accepted article by VJMech at the proof stage.
Text: Indicate references by number(s) in square brackets in line with the text. The actual authors can be referred to, but the reference number(s) must always be given.
Example: '..... as demonstrated [3-6]. Barnaby and Jones  obtained a different result ....'
List: Number the references (numbers in square brackets) in the list in the order in which they appear in the text.
Reference to a journal publication:
 N. D. Anh. Dual approach to averaged values of functions. Vietnam Journal of Mechanics, 34(3), (2012), pp. 211–214. https://doi.org/10.15625/0866-7136/34/3/2361.
Reference to a book:
 C. W. S. To. Nonlinear random vibration: Analytical techniques and applications. CRC Press, (2011).
Reference to a proceeding paper:
 N. D. Anh and M. Di Paola. Some extensions of Gaussian equivalent linearization. In Proceedings of International Conference on Nonlinear Stochastic Dynamics, Hanoi, Vietnam, (1995), pp. 5–16.
Reference to a PhD thesis:
 S. T. Oni. On the dynamic response of elastic structure to moving multi-mass system. PhD thesis, University of Ilorin, Nigeria, (1991).
Appendices: If there is more than one appendix, they should be identified as A, B, etc. Formulae and equations in appendices should be given separate numbering: Eq. (A.1), Eq. (A.2), etc.; in a subsequent appendix, Eq. (B.1) and so on. Similarly for tables and figures: Table A.1; Fig. A.1, etc.
Authors who are asked to prepare a revised manuscript should also include a point-by-point response to all referee comments. They should also supply a list of changes made to the manuscript. It will be necessary to give page and line numbers where revisions have been made.
Authors are allowed to resubmit work that has been previously rejected by VJMech, provided
(a) Significant changes have been made relative to the rejected version
(b) The authors supply a covering letter explaining what changes have been made
(c) Six months have elapsed since the previous submission.
Reject - Resubmission possible
The main differences between this case and the previous one are that
(a) Resubmission is explicitly offered as an option, with no 6-month minimum delay imposed;
(b) Authors should note that if they do resubmit, they need to provide details of the previous submission, so that editors can refer to the original reviews and, if appropriate, may use the same reviewers.
Use of the Digital Object Identifier
The Digital Object Identifier (DOI) may be used to cite and link to electronic documents. The DOI consists of a unique alpha-numeric character string which is assigned to a document by the publisher upon the initial electronic publication. The assigned DOI never changes. Therefore, it is an ideal medium for citing a document, particularly 'Articles in press' because they have not yet received their full bibliographic information. Example of a correctly given DOI (in URL format; here is an article in VJMech): https://doi.org/10.15625/0866-7136/14205.
When you use a DOI to create links to documents on the web, the DOIs are guaranteed never to change.
We encourage all authors of accepted articles to act as reviewers for the Vietnam Journal of Mechanics.