Thank you for choosing to submit your paper to us. These instructions will ensure we have everything required so your paper can move through peer review, production and publication smoothly. Please take the time to read and follow as closely as possible, as doing so will ensure your paper matches the journal's requirements.

Conformance to standards of ethical behaviour is expected of all parties involved: authors, editors, reviewers, and the publisher. Before submitting the paper, please read our Journal policy and Publication ethics statement carefully.

The Journal of the Polytechnic of Rijeka is issued once a year and it encompasses scientific and professional articles, critical book reviews and other publications and translations of significant articles written by foreign authors in the field of natural, biotechnical and social sciences, which can, according to their content, generate interest of scientific and professional public. The paper must be relevant to international scientific and professional public with clearly defined objectives and results of the research, a conclusion, references in the text and a bibliography at the end of the paper. The ideas presented in the paper must be original, considerably contributing to the development of the topic researched with a clearly described methodology. All articles submitted that are in accordance with the conception of the journal will be reviewed by two anonymous and independent reviewers and categorized into one of the following categories according to the prescribed classification of scientific and professional papers: original scientific paper, preliminary communication, review article, conference paper, professional paper.

One author can submit and publish not more than one article in a single issue of the Journal.

The Journal of the Polytechnic of Rijeka does not charge article processing charge (non-APC model).

Paper must be submitted no later than 1^st December in order to be sent through a review process and taken into consideration for publishing in the current issue.

When writing articles authors must pay special attention to the appropriate structuring of the text and its length according to the instructions - please, read Guidelines for Authors carefully. The manuscript should not exceed 7000 words (including abstracts, keywords, footnotes, tables, references, captions and appendices), and the manuscript should not be published or sent to another publisher for publishing. It is also necessary to submit the summary in English (if the article is in Croatian or vice versa).

The main body of the text should begin with an introduction and contain sections, footnotes, tables, graphs, diagrams, references in the text, a conclusion and a bibliography.

Papers are submitted via electronic mail together with a completed form (Application form) which contains the following information: title of the article, name and surname of the author and co-author, and academic title, qualification, a field of interest, i.e. a field that the author deals with, name and address of the institution affiliation, telephone number, fax number, email address, and a signed Copyright Statement, the consent to submit the paper to the reviewing procedure, and Statement - consent for personal data collection, processing and sharing. All the information given should be written in the language of the article, in Croatian and in English (if the original language of the article is other than English). If there is more than one author, the Application form, the statement and consent have to be signed by all authors.

By signing the Application form the author gives consent to publish the delivered paper in The Journal of the Polytechnic of Rijeka according to the rules of a CC BY-NC licence.

Contributions should be written in standard language free of spelling and grammar mistakes. Authors have to comply with all the editing and other guidelines provided by the Editorial Board. The authors are responsible for language editing. Therefore, they must submit a proofread final version of the positively evaluated paper in order to be accepted for publishing, together with the signed proofreading confirmation by professional proofreaders.

It is necessary to ensure the application of the standards of ethical practice by all parties that participate in the publication procedure. Author(s) should read Publication Ethics Statement (Code of Ethics) and act accordingly.

If there is more than one author, all of the authors must contribute to the scientific results and findings to a sufficient extent to be regarded for co-authorship. Guest authorship without the actual involvement of the co-author and Ghost authorship without listing the real author are considered as unethical behaviour.

Manuscripts should be sent to the Editorial Board electronically via e-mail: zbornik@veleri.hr.

The editors reserve the right to return manuscripts which do not meet the guidelines criteria to the authors, without blind review. The editors reserve the right to fully adapt the manuscript to comply with the Journal editing rules.

The author(s) should register via (https://orcid.org/signin) in order to obtain an ORCID identifier. The ORCID identifier is a researcher’s unique and permanent identifier which allows for better visibility and interoperability of a wide range of information systems.