Publish first, review after! Open access and open peer review!


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Publishing model

With Frelsi, fast and transparent publishing is possible by leveraging the publish first, review after model. Post-publication peer review is open, fair and eliminates the selection bias of traditional journal editorial boards.

Is made easy by completing a simple from. Initial screening and formatting following the submission ensures legitimacy of the content, compliance with our policies and formatting.
& Deposit
The article is published approximately within seven days together with any corresponding data, is assigned a Digital Object Identifier, and can be viewed or cited. Authors suggest potential reviewers for their paper.
peer review
Qualified reviewers are invited by Frelsi considering the author's suggestions against possible conflict of interest and qualification. Names and affilations of reviewers, as well as their comments, are displayed on the article page.
Authors are encouraged to update their paper based on the reviews. The responses of authors are also public. Each version of the paper can be viewed and cited separately. Papers that pass the review are indexed in external databases, such as Google scholar.
  1. Purpose and Scope 

  2. Publication process 

Purpose and scope

Main features of Frelsi are:

  • Gold open access           
  • Rapid publishing within a single week
  • Creative Commons licensing - CC BY 4.0
  • Open, post-publication peer review
  • Continued review - readers can comment even after the official review is done
  • Data on which the results are based is expected to be submitted with the paper
  • Multimedia publications for free - video, audio, presentation, poster

Frelsi is an online publishing platform reporting the latest scientific results within electrical engineering through a number of output formats. The purpose of Frelsi is to serve the scientific community given that at least one of the authors is competent researcher currently active in the field of electrical engineering (academic or industrial) and has significantly contributed to the manuscript.

Every manuscript submitted has to be authentic (not plagiarized). A number of possible formats and article types lets authors accurately describe their results. Aside from traditional article publication, authors can publish videos, audio, slides, posters, or software tools. A complete list of article and other formats is given here.

Authors are entirely responsible for the submitted content. After a paper is published, an open peer-review takes place. Reviewers are selected by the authors and invited by Frelsi if they fit the selection criteriaReviewers must be registered, and their identity is public as well as their reviews. Authours thus have a pivotal role in ensuring their papers are peer-reviewed by independent professionals within a reasonable time frame. Papers that pass peer review are indexed in Scopus, Google Scholar etc. The videos, audio, posters, or slides are not peer-reviewed or included in external databases.

All published content is freely accessible and the review process completely transparent. To improve the reproducibility of the published results, authors are encouraged to add the description of methods and provide source data, code, or models whenever possible.

Frelsi also publishes alternative scientific outputs, such as methods, protocols, guidelines, and other which fall outside the categories supported in the submission form.


Frelsi is a multidisciplinary publication platform, not a journal in the traditional sense. We publish in many areas of electrical engineering including, but not limited to:

  • Antennas and propagation
  • Aerospace engineering
  • Biomedical engineering
  • Circuits and systems
  • Components, manufacturing and packaging
  • Computational imaging
  • Electromagnetic theory
  • Electromagnetic compatibility
  • Measurements and instrumentation
  • Metamaterials theory
  • Metamaterials applications
  • Microwave theory
  • Microwave and wireless communications
  • Microwave technology
  • Numerical methods
  • Signal processing
  • Terahertz technology

Board members

The Advisory Board consists of a group of leading experts across the fields of Electrical Engineering who provide strategic input on the inner functionings of the platform and occasionally advise on any potential problems that may arise with specific publications. If they choose to, they can also serve as reviewers. The role of the board is solely advisory. There is no Editor-in-Chief to oversee any part of the publishing process or make decisions on the acceptance of publications.

Index terms

Acceptance status Accepted – a status given by a reviewer to a paper which is generally sound and requires only minor to no corrections. Two 'Accepted' statues or two 'Accepted with restrictions' and one 'Accepted' status by invited reviewers mean the paper successfully passed review. Acceptance criteria are specific for each paper category. For a research paper, this means that the analysis, methods, and experimental validation are suitable; conclusions are accurate and based on the data.

Acceptance status Accepted with restrictions – a status given by a reviewer to a paper requiring small adjustments, possibly specific significant changes. To earn a change of the status to Accepted, authors should address the issues highlighted by the reviewer.

Acceptance status Not accepted – a status given by a reviewer to a substandard paper containing significant flaws undermining the results and conclusion presented. Although the paper is published, authors are advised to address the issues of the reviewers thoroughly.

Board members – compared to traditional journals, the board of Frelsi has purely advisory character. There is no editor in chief or associate editors who make decisions regarding acceptance or rejection of papers. The board members advise annually on the way Frelsi functions and sometimes on issues with specific publications.

CC Licenses – papers, posters, slides, videos, and audio files are published under CC-BY license which permits free use, copying, and redistribution of the published material afforded by the proper citation of the original work and remaining of the copyright with the original copyright owner - the author and/or their institution.

To enable broad adoption of novel research results and the data associated with the papers by the scholarly community, we use the license attribution under the CC-0 license whenever possible.

Data note – a type of paper publication containing detailed information about the data sets, models, or code, deserving publication on its own. As other paper publications, also Data note is assigned DOI for citation purposes.

DOI – stands for Digital Object Identifier. Every type of publication in Frelsi has unique DOI for referencing. Each version of an article is given a separate DOI.

Data policies – whenever applicable and possible, authors of a paper are required to provide the data on which the conclusions are based. In case of third party restrictions on the data sharing, we work with the authors to establish sharing/access policy which complies with the rules of the owners of the rights.

Green open access – after a paper is published in any journal or publishing platform, the author self-archives a copy of the paper in an institutional or specialized online archive (repository) where it is freely accessible.

Gold open access  after a paper is published in an online open access journal or publishing platform, it is available to anyone worldwide.

Open peer-review – reviewers invited by Frelsi do rigorous peer-review. The identities, affiliations, and the reviews are public and citable.

Publication – a paper is considered published once it passes in-house screening by our team and formatting. Qualified reviewers invited by Frelsi do the peer-review. Aside from written feedback, reviewers give the article an acceptance status - 'Accepted', 'Accepted with restrictions,' or 'Not accepted.'

Processing fees – paid by the authors for publishing a paper in Frelsi. This fee is applied once the paper passes initial screening and formatting. More details on the fees and discounts here.

Review status Inviting reviewers – after initial screening and formatting, the authors are prompted to pay the processing fee. Once paid, the article is given the 'Inviting reviewers' status indicating that we are working on inviting qualified reviewers.

Reviewer – are invited by Frelsi based on suggestions of authors or through our search. Before invitation, we ensure the potential reviewers do not have a conflict of interests and are qualified. The names and reports of the reviewers are public and decide if a paper passed peer-review.

Review – a short note written by an invited reviewer addressing the shortcomings of a paper. The reviewer also assigns an acceptance status – 'Accepted,' 'Accepted with restrictions,' or 'Not accepted' depending on the paper quality. Registered users can comment on the reviews which are public as well as the responses of authors.

User – to submit a paper or any other medium to Frelsi, users need to be registered. During registration, users must provide name, affiliations, and contact email.

User comments – registered users can comment on each paper, as well as the reviewer comments on the paper page in order to open the presented research for broader discussion and additional perspectives.

Version – as paper goes through review stages, revised versions are submitted. Each version of a paper is accessible and can be cited separately.

Terms and Conditions

1. General terms

  • Frelsi is an open-access publishing platform, where papers and other published media are governed by Creative Commons licenses further specified below.
  • By using this website, you agree to be bound by the Terms and Conditions which form a contract between you and Frelsi.
  • By using this website, you confirm that you accept our Registration & privacy terms and Fresli reserves the right to terminate or freeze your account without notice at will.
  • Redistribution, depositing, or creating a database of the content of this webpage in electronic or physical form is not allowed, except what the Creative Commons license attribution permits, or when Frelsi authorizes intended use.
  • The users of this webpage can post Comments on the published Content. Their Comments are not edited or screened before the publication and do not represent the views or opinions of Frelsi or any of its affiliates. Comments express the views and opinions of the person who posted them. Therefore Frelsi will not be responsible or liable for the content, any possible damages, or loss due to the appearance of the Comments on this webpage.
  • Fresli reserves the right to change the Terms and Conditions at any time, and you will be considered to have accepted possible changes at the time Frelsi has published them on this page.

2. Publishing

Depending on the chosen publication format, the terms and conditions vary to some degree. The differences are described in the following text. These terms describe how users can interact with Frelsi. If you do not agree with any of the terms outlined here, please do not use Frelsi.


The “Content” includes all the media published in Frelsi website (“Website”), namely:

  • Papers – original texts created and submitted by the authors. This includes all types of papers published in Frelsi, that is, research, review, design, method, data note, software tool, or editorial.
  • Data – usually attached to papers to support the repeatability of the presented results.
  • Slides, posters, audio, and videos – additional types of publications possible with Frelsi.


The term “User” includes registered as well as non-registered users. When applicable, User type will be further specified as “Author” and “Reviewer.”


The 'paper' and 'data' part of the Content are to be used by Frelsi according to Creative Commons CC BY and CC0 licenses respectively. Before your Content can be published, you and the co-authors (if applicable) agree and warrant these terms and conditions:

  • You and any co-authors are the sole authors of the Content.
  • The Content has not been previously published and is not being reviewed or submitted to any other platform or journal.
  • You and the co-authors have necessary permissions from all contributors (in case your Content contains results of others, who are not necessarily in the author list) and own exclusive copyright to the Content.
  • No part of the Content infringes on any intellectual property or privacy rights. Further, no part of the content presents any defamatory or obscene information.

Slides, Videos, Audio, and Posters

The same terms and conditions apply to posters, slides, audio, and videos as for papers with the exception that these outlets do not have to present original results not published previously and/or presented on events such as conferences. In case they were presented somewhere already, authors have to reference this fact during submission. These outlets are subject to CC BY license.

Allowed uses for the Content

All Content published in Frelsi is open-access (OA) and governed by Creative Commons licenses. There are no fees to be paid by users – registered or not – to view or download published Content. According to the Creative Commons BY 4.0 license, registered, as well as non-registered users are free to share (copy and redistribute the Content in any medium or format) and adapt (remix, transform and build upon the Content for any purpose, even commercially) the Content provided that users give appropriate credit, provide a link to the license and indicate if changes were made.

This may be done in a reasonable manner, but not in the way that suggests the licensor endorses you or your use.

Users may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

3. Registration & privacy

Users who want to publish in Frelsi are required to register. The registration belongs to only one User. Therefore, Users should not share their login data with anyone or have their account used by multiple people.

By registering with Frelsi, Users agree to following conditions:

  • Users are responsible for every activity on Frelsi webpage while logged in and to ensure that third parties will not use their login information.
  • Users should ensure that the information provided at the registration is accurate and up to date (in the case of email or affiliation change, please change your registration data).

At Frelsi, we take the privacy of our Users seriously. Viewing and download of the Content are free and possible without registration. Users only need to register when they want to comment on the Content or publish.

Users may decline to provide the information requested at the registration. However, some services might be inaccessible due to insufficient information necessary to enable full functionality in a safe and identifiable way.

If necessary, Frelsi reserves the right to disclose personal information of User if requested by any legal or criminal proceedings. In case you have any questions about the privacy terms, contact us at

Information we track – Frelsi tracks the traffic on the Website to see what part of our Content is most interesting for Users. Based on the topics selected at the time of registration, we might use this data to provide the most relevant information to our Users.

Cookies – Fresli website uses cookies – a type of file saved on your computer which enables more fluid and seamless user experience. The primary purpose of cookies is to track website usage, remember the movement of users and their preferences, and target specific content and advertising.

Email addresses – Frelsi only shares User information with third parties when registered User gives explicit consent to do so at the time of the registration. Based on this consent, Frelsi might occasionally send information about products or promotional offers from our partners to registered Users.

Online advertising – Fresli will not share the User data with any advertising agencies unless explicitly agreed by the User. However, statistical data about the Frelsi usage might be shared with advertisers.

4. User comments

Registered Users can comment on the Content published in Frelsi to exchange information or opinions. Users agree to the terms outlined here at the time of their first comment and onward. User comments are herein generally referred to as Comments.

  • User Comments should strictly stick to the topic of the Content. Frelsi reserves the right to remove any Comments that fall out of the Content topic with full discretion.
  • Comments are not moderated or reviewed before they are displayed. The Comments express the views and opinions of the Users and Frelsi is to the degree allowed by law, not liable or responsible for any damage, or loss possibly resulting from the display of the Comments.
  • Defamatory, offensive, profane, obscene, harassing, or otherwise suggestive Comments will not be tolerated and will be removed. On the base of such Comments, Frelsi reserves the right to terminate the User account.
  • Attempts by User to falsely impersonate someone or claim affiliation with any institution are grounds for termination of their account.
  • User agrees to indemnify and hold harmless Frelsi, its employees, affiliates, partners, directors and agents from and against any, and all damages, costs, losses, liabilities, expenses of any nature emerging from User infringing these Terms and Conditions or based on the Comments on the Content of this web page.

5. Refunds

Once a paper (or any other type of content) is published, authors do not have an option of a refund. Even after a paper receives negative feedback, authors are encouraged to submit a new, improved version of the paper. Refunds are not optional even after retraction since we have dedicated resources, time, and support during the review process to publish your paper.

While we understand that it is disappointing to receive negative feedback, we see the publication of a paper as a process - we strongly encourage authors to improve their work, so the feedback on their writing improves in the future review rounds.

6. Retractions and peer review termination

The articles published in Frelsi are stored permanently regardless of the outcome of the peer-review. If the article does not receive any reviews after half a year or only one after nine months, authors may opt to stop the peer review. After that, the paper is still published (similar to pre-print servers), but authors are free to submit it to a different journal.

Publications can be retracted based on following reasons - plagiarism, duplicate publication, overlapping publication, data fabrication, or because of errors reported by the authors themselves.

After the paper is published, the user can request the retraction of a paper during the first fourteen days after the date of publication.

7. Legal information

Frelsi LLC

Contact person:

Tomas Zvolensky (

J. Ponicana 57
960 01, Zvolen

Registration number: 51 701 367   

VAT number: we do not pay VAT

Contact number: +421 950 708 704 (call between 9:00 - 17:00 CET) 



1. How is Frelsi different from pre-print services like ArXiv?

Pre-print servers do not have a peer-review system and authors often submit their work to a regular journal even after it is published on a pre-print server. Frelsi has a rigorous peer-review system based on an invitation that takes place after publication, and papers cannot be submitted to other journals. In Frelsi, publication and review are separate procedures.

2. Are papers published without peer review?

Peer review follows after the paper is published - assigned DOI and is available to view and download publicly. Papers are published after initial screening and formatting. Publishing and peer review are two separate processes when publishing in Frelsi.

3. What are the initial screening and formatting phases?

Initial screening is done by our editorial team to ensure that the authors of the paper are qualified researchers and that the paper submitted is not plagiarized, fabricated, or overlapping with another publication to a degree that would qualify it as duplicate publication. Paper is then formatted to fit our template and online version.

4. In what are the areas is Frelsi publishing?

Electrical engineering is publication domain of Frelsi. Fields and topics can be viewed here, but are not limited by default.


General enquiries

If you have general or specific questions about FRELSI, contact us at


Tomas Zvolensky
 +421 950 708 704
(call between 9:00 and 17:00 CET)

Public relations

Salimi Akill
 +421 950 227 545
(call between 9:00 and 17:00 CET)

Web admin

Petr Lukas