Focus and Scope

Extrapolasi is published by Universitas 17 Agustus 1945 Surabaya. The Extrapolasi editorial is very open in accepting articles related to :

  • Building Materials and Structures
  • Constructions Technology
  • Constructions Management, Road and Bridge Engineering
  • Earthquake Engineering, Geotechnical Engineering, Hydraulic Structures and Drainage
  • Structural Engineering, Surveying and Geo-Spatial Engineering
  • Transportation Engineering.

Peer Review Process

All manuscripts received by Extrapolasi will be reviewed through these several process :

  1. Manuscripts will be reviewes by Editor whether it has conformity with the journal template, purpose and scope of the journal, and the methodology used (rejected if it does not meet the criteria).
  2. Manuscripts must be free of plagiarism content, the maximum limit of similarity is 20%. The manuscript will be rejected if it has major plagiarism, however, the author will be asked for clarification if the similarity is low of has minor plagiarism. For checking Plagiarism, manuscript will be screened plagiarism by using several plagiarism detection software (Turnitin).
  3. The submitted manuscript will be reviewed by double blind peer-reviewed (both reviewer and author remain anonymous to each other).
  4. Reviewer send back his review form to Editor (with revised manuscript if necessary).
  5. Review given by reviewers will be discussed in the editor's meeting to decide whether the manuscript is rejected, requires major revisions, requires minor revisions, or is accepted.
  6. If the decision is a revision, the author will be contacted to revise the text and must be returned to the editor without delay. Returned later than three months will be considered as new submissions.

Publication Frequency

Extrapolasi published by Universitas of 17, 1945 Surabaya is scheduled for publication two times a year, in June and December.

Important to note :

  1. For June publication, submission manuscript will be due on March. The review process starts on March.
  2. For December publication, submission manuscript will be due on September. The review process starts on September.

Open Access Policy

This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.

References Management

Writing citations and references must refer to the Modern Humanities Research Association 3rd edition (note with bibliography) style. 

Retraction Policies

Extrapolasi will be considered to retract in the publication if:

  • They have clear evidence that the findings are unreliable, either as a result of misconduct (e.g. data fabrication) or honest error (e.g. miscalculation or experimental error)

  • The findings have previously been published elsewhere without proper cross-referencing, permission or justification (i.e. cases of redundant publication)

  • It constitutes plagiarism

  • It reports unethical research

The mechanism of retraction follows the Retraction Guidelines of COPE Retraction Guidelines

Manuscript Withdrawal

Withdrawing submitted or published manuscripts is not recommended. If the writer intends to retract the manuscript, the following rules must be followed:

  1. Manuscripts may only be withdrawn for acceptable reasons. Must not withdraw the manuscript because it has been published in another journal.

  2. The author must make a letter requesting withdrawal of the manuscript to the chief editor, along with the reasons for withdrawal. Requests for withdrawal of the manuscript must know all the authors, evidenced by the signature.

  3. If the manuscript being withdrawn is in the process of being reviewed, then the writer must pay 500.000 (IDR)

  4. If the text has been withdrawn, the writer must pay 1.000.000 (IDR)

  5. If the review process of the manuscript is more than 6 months, the writer can withdraw the manuscript without having to pay a fine.

The author can download template of manuscript withdrawal

Plagiarism Policy

Extrapolasi has a policy of not publishing manuscripts containing plagiarism. As a preventative measure, we will do a plagiarism check for every manuscript sent to the editor. Manuscripts must be free of plagiarism content, the maximum limit of similarity is 20%. The manuscript will be rejected if it has major plagiarism, however, the author will be asked for clarification if the similarity is low of has minor plagiarism. For checking Plagiarism, manuscript will be screened plagiarism by using several plagiarism detection software (Turnitin).

If there are manuscripts that have been published and proven plagiarism, then sanctions will be reprimanded until the withdrawal of the manuscript.

Publication Ethics

Publication Ethics Statement

Extrapolasi is a peer-reviewed national journal. This statement clarifies ethical behavior of all parties involved in the act of publishing an article in this journal, including the author, the chief editor, the Editorial Board, the peer-reviewer and the publisher (Program Studi Sarjana Teknik Sipil Fakultas Teknik Universitas 17 Agustus 1945 Surabaya). This statement is based on COPE’s Best Practice Guidelines for Journal Editors.


Ethical Guideline for Journal Publication

The publication of an article in a peer-reviewed Extrapolasi is an essential building block in the development of a coherent and respected network of knowledge. It is a direct reflection of the quality of the work of the authors and the institutions that support them. Peer-reviewed articles support and embody the scientific method. It is therefore important to agree upon standards of expected ethical behavior for all parties involved in the act of publishing: the author, the journal editor, the peer reviewer, the publisher, and the society.  

 Universitas 17 Agustus 1945 Surabaya as the publisher of Extrapolasi takes its duties of guardianship over all stages of publishing extremely seriously and we recognize our ethical and other responsibilities. We are committed to ensuring that advertising, reprint or other commercial revenue has no impact or influence on editorial decisions. In addition,  Universitas 17 Agustus 1945 Surabaya and Editorial Board will assist in communications with other journals and/or publishers where this is useful and necessary.


Publication decisions

The editor of the Extrapolasi is responsible for deciding which of the articles submitted to the journal should be published. The validation of the work in question and its importance to researchers and readers must always drive such decisions. The editors may be guided by the policies of the journal's editorial board and constrained by such legal requirements as shall then be in force regarding libel, copyright infringement and plagiarism. The editors may confer with other editors or reviewers in making this decision.


Fair play

An editor at any time evaluates manuscripts for their intellectual content without regard to race, gender, sexual orientation, religious belief, ethnic origin, citizenship, or political philosophy of the authors.


The editor and any editorial staff must not disclose any information about a submitted manuscript to anyone other than the corresponding author, reviewers, potential reviewers, other editorial advisers, and the publisher, as appropriate.


Disclosure and conflicts of interest

Unpublished materials disclosed in a submitted manuscript must not be used in an editor's own research without the express written consent of the author.


Duties of Reviewers

Contribution to Editorial Decisions

Peer review assists the editor in making editorial decisions and through the editorial communications with the author may also assist the author in improving the paper.


Any selected referee who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the editor and excuse himself from the review process.


Any manuscripts received for review must be treated as confidential documents. They must not be shown to or discussed with others except as authorized by the editor.

Standards of Objectivity

Reviews should be conducted objectively. Personal criticism of the author is inappropriate. Referees should express their views clearly with supporting arguments.

Acknowledgment of Sources

Reviewers should identify relevant published work that has not been cited by the authors. Any statement that an observation, derivation, or argument had been previously reported should be accompanied by the relevant citation. A reviewer should also call to the editor's attention any substantial similarity or overlap between the manuscript under consideration and any other published paper of which they have personal knowledge.

Disclosure and Conflict of Interest

Privileged information or ideas obtained through peer review must be kept confidential and not used for personal advantage. Reviewers should not consider manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the papers.


Duties of Authors

Reporting standards

Authors of reports of original research should present an accurate account of the work performed as well as an objective discussion of its significance. Underlying data should be represented accurately in the paper. A paper should contain sufficient detail and references to permit others to replicate the work. Fraudulent or knowingly inaccurate statements constitute unethical behavior and are unacceptable.

Data Access and Retention

Authors are asked to provide the raw data in connection with a paper for editorial review, and should be prepared to provide public access to such data (consistent with the ALPSP-STM Statement on Data and Databases), if practicable, and should in any event be prepared to retain such data for a reasonable time after publication.

Originality and Plagiarism

The authors should ensure that they have written entirely original works, and if the authors have used the work and/or words of others that this has been appropriately cited or quoted.

Multiple, Redundant or Concurrent Publication

An author should not, in general, publish manuscripts describing essentially the same research in more than one journal or primary publication. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable.

Acknowledgment of Sources

Proper acknowledgment of the work of others must always be given. Authors should cite publications that have been influential in determining the nature of the reported work.

Authorship of the Paper

Authorship should be limited to those who have made a significant contribution to the conception, design, execution, or interpretation of the reported study. All those who have made significant contributions should be listed as co-authors. Where there are others who have participated in certain substantive aspects of the research project, they should be acknowledged or listed as contributors. The corresponding author should ensure that all appropriate co-authors and no inappropriate co-authors are included on the paper and that all co-authors have seen and approved the final version of the paper and have agreed to its submission for publication.

Hazards and Human or Animal Subjects

If the work involves chemicals, humans, animals, procedures or equipment that have any unusual hazards inherent in their use, the author must clearly identify these in the manuscript.

Disclosure and Conflicts of Interest

All authors should disclose in their manuscript any financial or another substantive conflict of interest that might be construed to influence the results or interpretation of their manuscript. All sources of financial support for the project should be disclosed.

Fundamental errors in published works

When an author discovers a significant error or inaccuracy in his/her own published work, it is the author’s obligation to promptly notify the journal editor or publisher and cooperate with the editor to retract or correct the paper.

 Editorial Team



Department of Civil Engineering, Universitas 17 Agustus 1945 Surabaya

Sources of Support

Extrapolasi's daily operational is mainly supported by the Civil Engineering Department, Universitas 17 Agustus 1945 Surabaya. Our office and equipment are provided by the department at level 1 of the department's building.

Extrapolasi also constantly supported by Universitas 17 Agustus 1945 Surabaya's management, especially Direktorat Sistem Informasi Universitas 17 Agustus 1945 Surabaya in maintaining our IT needs being an online journal.

Journal History

Civil Engineering is one of engineering science branch that studies how to design, build, renovate not only buildings and infrastructure, but also includes the environment for the benefit of human life. Meanwhile, Civil Engineering Study Program at 17 August 1945 University of Surabaya is a study program that has 5 scientific fields. They are the field of structure, geotechnics, transportation, water affairs and management. To support these five scientific fields, there are other disciplines that have an important role. For example, mathematics, physics, statistics and probability.

Extrapolation is a scientific form of mathematics which is the process of estimating the value of a variable beyond its original observation interval based on the relationship with other variables. Extrapolation plays an important role in 5 scientific fields in the Civil Engineering Study Program. One of them is in the water affairs field, extrapolation estimates supporting data in estimating lost rain data. In the transportation field, extrapolation is used to calculate LHR data, population growth data, and trip attraction generation data. In the structural field, it is used to estimate compressive strength data and concrete research. Whereas in the geotechnical field, extrapolation is used to predict soil data which can be used in foundation planning later.

Based on the important role mentioned above, extrapolation is the reason for choosing the name of a journal in the Civil Engineering Study Program, where extrapolation itself can enter into all scientific fields in Civil Engineering. 

Extrapolasi was first published online in 2012 and managed by Civil Engineering Master Program of Universitas 17 Agustus 1945 Surabaya. In 2016, Extrapolasi is in vacuum period and start published again in 2020 with different management. From 2019, Extrapolasi was managed by Department of Civil Engineering (Bachelor Degree Program) of Universitas 17 Agustus 1945 Surabaya. Extrapolasi had ISSN online with number 2721-978X in 2019. Extrapolasi which managed by Department of Civil Engineering (Bachelor Degree Program) of Universitas 17 Agustus 1945 Surabaya began to publish on June 2020 (vol 17 no.1) with 5 articles. From December 2021, Extrapolasi published 7 articles.