Nauki Techniczne

Metrology and Measurement Systems

Zawartość

Metrology and Measurement Systems | 2014 | No 1 |

Abstrakt

This paper describes a new and efficient method for quantifying and detection of the source of distortion caused by a single customer in a case when many other customers exist in a power grid. It is based on measuring distortion power, a component of apparent power that only exists with a nonlinear load. Different definitions for distortion power calculation are investigated. All these definitions show without doubt that the proposed method is feasible. Moreover, this method allows to develop fair and reliable billing schemes for controlling harmonic pollution. Measurement and simulation results confirm the effectiveness and applicability of the method. The proposed solution is suitable for software/hardware upgrade of existing electronic power-meters.

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Autorzy i Afiliacje

Dejan Stevanović
Predrag Petković

Abstrakt

Studies of electrical properties, including noise properties, of thick-film resistors prepared from various resistive and conductive materials on LTCC substrates have been described. Experiments have been carried out in the temperature range from 300 K up to 650 K using two methods, i.e. measuring (i) spectra of voltage fluctuations observed on the studied samples and (ii) the current noise index by a standard meter, both at constant temperature and during a temperature sweep with a slow rate. The 1/f noise component caused by resistance fluctuations occurred to be dominant in the entire range of temperature. The dependence of the noise intensity on temperature revealed that a temperature change from 300 K to 650 K causes a rise in magnitude of the noise intensity approximately one order of magnitude. Using the experimental data, the parameters describing noise properties of the used materials have been calculated and compared to the properties of other previously studied thick-film materials.

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Autorzy i Afiliacje

Adam Witold Stadler
Zbigniew Zawiślak
Andrzej Dziedzic
Damian Nowak

Abstrakt

A system for precise angular laser beam deflection by using a plane mirror is presented. The mirror was fixed to two supports attached to its edges. This article details the theoretical basis of how this deflector works. The spring deflection of a flat circular metal plate under a uniform axial buckling was used and the mechanical stress was generated by a piezoelectric layer. The characteristics of the deformation of the plate versus the voltage control of the piezoelectrics were examined and the value of the change resolution possible to obtain was estimated. An experimental system is presented and an experiment performed to examine this system. As a result, a resolution of displacement of 10-8 rad and a range of 10-5 rad were obtained.

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Autorzy i Afiliacje

Olga Iwasińska-Kowalska

Abstrakt

Time domain analysis is used to determine whether A/D converters that employ higher order sigma-delta modulators, widely used in digital acoustic systems, have superior performance over classical synchronous A/D converters with modulators of first order when taking into account their important metrological property which is the magnitude of the quantization error. It is shown that the quantization errors of delta-sigma A/D converters with higher order modulators are exactly on the same level as for converters with a first order modulator.

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Autorzy i Afiliacje

Tadeusz Sidor

Abstrakt

Materials and their development process are highly dependent on proper experimental testing under wide range of loading within which high-strain rate conditions play a very significant role. For such dynamic loading Split Hopkinson Pressure Bar (SHPB) is widely used for investigating the dynamic behavior of various materials. The presented paper is focused on the SHPB impulse measurement process using experimental and numerical methods. One of the main problems occurring during tests are oscillations recorded by the strain gauges which adversely affect results. Thus, it is desired to obtain the peak shape in the incident bar of SHPB as “smooth” as possible without any distortions. Such impulse characteristics can be achieved using several shaping techniques, e.g. by placing a special shaper between two bars, which in fact was performed by the authors experimentally and subsequently was validated using computational methods.

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Autorzy i Afiliacje

Paweł Baranowski
Roman Gieleta
Jerzy Malachowski
Krzysztof Damaziak
Lukasz Mazurkiewicz

Abstrakt

A method for evaluating the dynamic characteristics of force transducers against small and short-duration impact forces is developed. In this method, a small mass collides with a force transducer and the impact force is measured with high accuracy as the inertial force of the mass. A pneumatic linear bearing is used to achieve linear motion with sufficiently small friction acting on the mass, which is the moving part of the bearing. Small and short-duration impact forces with a maximum impact force of approximately 5 N and minimum half-value width of approximately 1 ms are applied to a force transducer and the impulse responses are evaluated.

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Autorzy i Afiliacje

Mitra Djamal
Kazuhide Watanabe
Kyohei Irisa
Irfa Aji Prayogi
Akihiro Takita
Takao Yamaguchi
Yusaku Fujii

Abstrakt

The article presents results of comparative tests performed to verify the conformity of geometric deviation measurements of a crankshaft carried out at a test bed equipped with a system of elastic support with measurements adopted as reference values. A number of simulation tests were carried out with varied shaft support conditions using the proposed measuring system. The selection criteria were established for support parameters. Meeting these criteria guarantees that shaft elastic deflections and strains are eliminated. Consequently, such strains will not affect the estimation of geometrical deviations of the measured object. The comparative evaluation measurement of roundness profiles and values of roundness deviations of main crankshaft bearing journals of a marine medium speed engine was performed using a correlation calculus. The results have revealed high conformity of both determined roundness deviation values and measured profiles compared to the reference ones.

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Autorzy i Afiliacje

Krzysztof Nozdrzykowski
Dariusz Janecki

Abstrakt

The designing process of high resolution time interval measurement systems creates many problems that need to be eliminated. The problems are: the latch error, the nonlinearity conversion, the different duty cycle coefficient of the clock signal, and the clock signal jitter. Factors listed above affect the result of measurement. The FPGA (Field Programmable Gate Array) structure also imposes some restrictions, especially when a tapped delay line is constructed. The article describes the high resolution time-to-digital converter, implemented in a FPGA structure, and the types of errors that appear there. The method of minimization and processing of data to reduce the influence of errors on the measurement is also described.

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Autorzy i Afiliacje

Stanisław Grzelak
Marcin Kowalski
Jarosław Czoków
Marek Zieliński

Abstrakt

Screw axis measurement methods obtain a precise identification of the physical reality of the industrial robots’ geometry. However, these methods are in a clear disadvantage compared to mathematical optimisation processes for kinematical parameters. That’s because mathematical processes obtain kinematical parameters which best reduce the robot errors, despite not necessarily representing the real geometry of the robot. This paper takes the next step at the identification of a robot’s movement from the identification of its real kinematical parameters for the later study of every articulation’s rotation. We then obtain a combination of real kinematic and dynamic parameters which describe the robot’s movement, improving its precision with a physical understanding of the errors.

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Autorzy i Afiliacje

Jorge Santolaria
Javier Conte
Marcos Pueo
Carlos Javierre

Abstrakt

The paper presents a new method for simultaneous tracking of varying grid impedance and its uncertainty bounds. Impedance tracking consists of two stages. In the first stage, the actual noise estimate is obtained from least squares (LS) residua. In the second stage, the noise covariance matrix is approximated with the use of residual information. Then weighted least squares (WLS) method is applied in order to estimate impedance and background voltage. Finally uncertainty bounds for impedance estimation are computed. The robustness of the method has been verified using simulated signals. The proposed method has been compared to sliding LS. The results have shown, that the method performs much better than the LS for all considered cases, even in the presence of significant background voltage variations.

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Autorzy i Afiliacje

Dariusz Borkowski
Szymon Barczentewicz

Abstrakt

The paper analyzes the phenomenon of heat transfer and its inertia in solids. The influence of this effect on the operation of an integrated circuit is described. The phenomenon is explained using thermal analogy implemented in the Spice environment by an R-C thermal model. Results from the model are verified by some measurements with a chip designed in CMOS 0.7 μm (5 V) technology. The microcontroller-based measurement system structure and experiment results are described.

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Autorzy i Afiliacje

Maciej Frankiewicz
Adam Gołda
Andrzej Kos

Abstrakt

This paper describes the design and test of a new high-current electronic current transformer based on a Rogowski coil. For better performances, electronic current transformers are used to replace conventional electro-magnetic inductive current transformers based on ferromagnetic cores and windings to measure high-current on the high voltage distribution grids. The design of a new high-current electronic current transformer is described in this paper. The principal schemes of the prototype and partial evaluation results are presented. Through relative tests it is known that the prototype has a wide dynamic range and frequency band, and it can allow high accuracy measurements.

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Autorzy i Afiliacje

Ming Zhang
Kaicheng Li
Shunfan He
Jun Wang

Abstrakt

In a dynamic machining process, distortion in surface irregularity is a very complex phenomenon. Surface irregularities form a periodic representation of the tool profile with various kinds of disturbance in a broad range of changes in the height and length of the profile. To discern these irregularity disturbances, interactions of the tool in the form of changes perpendicular and parallel relative to the workpiece were analyzed and simulated. The individual kinds of displacement of the tool relative to the workpiece introduce distortions in the changes of height and length. These changes are weakly represented in standard height and length irregularity parameters and their discernment has been found through amplitude-frequency functions.

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Autorzy i Afiliacje

Adam Boryczko
Wojciech Rytlewski

Abstrakt

In this paper, an analysis of various factors affecting machined surface texture is presented. The investigation was focused on ball end mill inclination against the work piece (defined by surface inclination angle a. Surface roughness was investigated in a 3D array, and measurements were conducted parallel to the feed motion direction. The analysis of machined surface irregularities as a function of frequency (wavelength A), on the basis of the Power Density Spectrum - PDS was also carried out. This kind of analysis is aimed at valuation of primary factors influencing surface roughness generation as well as its randomness. Subsequently, a surface roughness model including cutter displacements was developed. It was found that plain cutting with ball end mill (surface inclination angle a= 0°) is unfavorable from the point of view of surface roughness, because in cutter’s axis the cutting speed vc ~ 0 m/min. This means that a cutting process does not occur, whereas on the machined surface some characteristics marks can be found. These marks do not appear in case of a* 0°, because the cutting speed vc * 0 on the fill I length of the active cutting edge and as a result, the machined surface texture is more homogenous. Surface roughness parameters determined on the basis of the model including cutter displacements are closer to experimental data for cases with inclination angles a* 0°, in comparison with those determined for plain cutting (a= 0°). It is probably caused by higher contribution in surface irregularities generation of plastic and elastic deformations cumulated near the cutter’s free end than kinematic and geometric parameters, as well as cutter displacements.

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Autorzy i Afiliacje

Michał Wieczorowski
Szymon Wojciechowski
Paweł Twardowski

Abstrakt

The article shows the methodology and calculation procedures based on Lagrange polynomial interpolation which were used to determine standard performance characteristics of the Polish production engine, type ANDORIA 4CTi90-1BE6. They allow to simplify the experimental research by maintaining a minimum number of measurement points and estimating the remaining data in an analytical way. The methods presented are convenient when it comes to the practical side because they eliminate the need for exploration of mathematical equations describing the various curves, which can be cumbersome and time consuming in the case of nonautomated accounts. The results of analysis were applied to actual experimental results, indicating sufficient accuracy of the resulting approximations. As a result, procedures may be used in bench testing of a similar profile, especially with repeated cycles of the experiment, such as optimization of operating parameters of combustion engines.

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Autorzy i Afiliacje

Tomasz Stoeck
Karol Franciszek Abramek

Redakcja

Editorial Board

Editor-in-Chief
Ryszard SZPLET
Military University of Technology, Poland
e-mail: ryszard.szplet@wat.edu.pl

Vice Editor-in-Chief
Paweł KWIATKOWSKI
Military University of Technology, Poland
e-mail: pawel.kwiatkowski@wat.edu.pl

Technical Editor and Webmaster

Dominik SONDEJ
Military University of Technology, Poland
e-mail: dominik.sondej@wat.edu.pl

Language Editor

Andrzej ŁUKASZEWICZ
Military University of Technology, Poland
e-mail: andrzej.lukaszewicz@wat.edu.pl


International Programme Committee


Andrzej ZAJĄC,
Chairman Military University of Technology, Poland
Bruno ANDO
University of Catania, Italy
Martin BURGHOFF
Physikalisch-Technische Bundesanstalt, Germany
Marcantonio CATELANI
University of Florence, Italy
Numan DURAKBASA
Vienna University of Technology, Austria
Janusz GAJDA AGH
University of Science and Technology, Poland
Domenico GRIMALDI
University of Calabria, Italy
Laszlo KISH
Texas A&M University, USA
Juha KOSTAMOVAARA
University of Oulu, Finland
Eduard LLOBET
Universitat Rovira i Virgili, Tarragona, Spain
Alex MASON
Liverpool John Moores University, The United Kingdom
Subhas MUKHOPADHYAY
Massey University, Palmerston North, New Zealand
Janusz MROCZKA
Wroclaw University of Science and Technology, Poland
Antoni ROGALSKI
Military University of Technology, Poland
Wiesław WOLIŃSKI
Warsaw University of Technology, Poland

Associate Editors

Sławomir CIĘSZCZYK
Lublin University of Technology, Poland
e-mail: s.cieszczyk@pollub.pl
Albin CZUBLA
Central Office of Measure, Poland
e-mail: albin.czubla@gum.gov.pl
Vladimir DIMCHEV
Ss. Cyril and Methodius University, Macedonia
e-mail: vladim@feit.ukim.edu.mk
Krzysztof DUDA AGH
University of Science and Technology, Poland
e-mail: kduda@agh.edu.pl
Agnieszka IWAN
Military University of Land Forces, Poland
e-mail: agnieszka.iwan@awl.edu.pl
Ireneusz JABŁOŃSKI
Wrocław University of Science and Technology, Poland
e-mail: ireneusz.jablonski@pwr.wroc.pl
Jacek JAKUBOWSKI
Military University of Technology, Poland
e-mail: jacek.jakubowski@wat.edu.pl
Jussi-Pekka JANSSON
University of Oulu, Finland
e-mail: jussi.jansson@oulu.fi
Mieczysław JESSA
Poznan University of Technology, Poland
e-mail: mieczyslaw.jessa@put.poznan.pl
Piotr KANIEWSKI
Military University of Technology, Poland
e-mail: piotr.kaniewski@wat.edu.pl
Piotr KISAŁA
Lublin University of Technology, Poland
e-mail: p.kisala@pollub.pl
Manoj KUMAR
Jaypee Institute of Information Technology, Uttar Pradesh, India
e-mail: my.hunn.manoj@gmail.com
Grzegorz LENTKA
Gdańsk University of Technology, Poland
e-mail:lentka@eti.pg.edu.pl
Czesław ŁUKIANOWICZ
Koszalin University of Technology, Poland
e-mail: czeslaw.lukianowicz@tu.koszalin.pl
Rosario MORELLO
University Mediterranean of Reggio Calabria, Italy
e-mail: rosario.morello@unirc.it
Fernando PUENTE LEÓN
University Karlsruhe, Germany
e-mail: f.puente@me.com
Hamid M. SEDIGHI
Shahid Chamran University of Ahvaz, Iran
e-mail: h.msedighi@scu.ac.ir
Petr SEDLAK
Brno University of Technology, Brno, Czech Republic
e-mail: sedlakp@feec.vutbr.cz
Tadeusz SONDEJ
Military University of Technology, Poland
e-mail: tadeusz.sondej@wat.edu.pl
Mirosław SZMAJDA
Opole University of Technology, Poland
e-mail: m.szmajda@po.edu.pl
Michał STRZELECKI
Lodz University of Technology, Poland
e-mail: michal.strzelecki@p.lodz.pl
Grzegorz ŚWIRNIAK
Wrocław University of Technology, Poland
e-mail: grzegorz.swirniak@pwr.wroc.pl
Michał WIECZOROWSKI
Poznan University of Technology, Poland
e-mail: jmichal.wieczorowski@put.poznan.pl
Jacek WOJTAS
Military University of Technology, Poland

Kontakt

E-mail: metrology@wat.edu.pl
URL: www.metrology.wat.edu.pl

Post address:
Editorial Office of Metrology and Measurement Systems
Military University of Technology
Faculty of Electronics
gen. Sylwestra Kaliskiego 2
00-908 Warsaw
Poland

Instrukcje dla autorów

Sample article with Author guidelines

Types of contributions
Metrology and Measurement Systems welcomes submissions of the following article types:
• invited special issue or review papers presenting the current stage of the knowledge within scope of the journal (about 20 edited pages, approximately 3000 characters each),
• research papers reporting high-quality original scientific or technological advancements (max. 12 pages),
• papers based on extended and updated contributions presented at scientific conferences (max. 12 pages),
• short notes, i.e. book reviews, conference reports, short news (max. 2 pages).
Manuscript preparation
General The text of a manuscript should be written in clear and concise English. The camera-ready format – with attached separate files containing illustrations, tables and photographs – is required. A cover letter with clear explanation of scientific novelty of the paper is strongly recommended. Papers based on extended and updated contributions presented at scientific conferences, or strongly related to previous authors’ works, must be accompanied with a cover letter file, which should explain in details changes made in the manuscript in comparison with the original conference paper and highlight the novelty in reference to other authors’ works.
The main text of a manuscript should be printed on an A4 page (with margins of 2.5 cm) using Times New Roman style with a font size of 12 pt; the paragraphs should start with the indentation of 5 mm, and titles should be written in bold. That text can be divided into sections (numbered 1, 2, …), first-order subsections (numbered 1.1., 1.2., …, written in italics), and – if needed – second-order subsections (numbered 1.1.1., 1.1.2., …, written same as first-order subsections). The only acceptable manuscript formats are in Microsoft Word (.doc, .docx).
The Editor encourages the Authors of submitted papers who are not English native speakers, to use a language service checking the language correctness not only with respect to grammar, but also in the way of presentation of research results accepted by renowned publishers, e.g. presented on the website of the European Association of Science Editors. The Editor encourages the Authors of submitted papers who are not English native speakers, to use a language service checking the language correctness not only with respect to grammar, but also in the way of presentation of research results accepted by renowned publishers, e.g. presented on the website of the European Association of Science Editors.

Figures
Figures (illustrations, photographs) and tables, provided in the camera-ready form suitable for reproduction (which may include reduction), should be additionally submitted (one per page), larger than the final size. While preparing figures we encourage to start with defining expected size and minimum font size that fit to all graphics in the manuscript – using the same style in all of your graphics visually improves the article. Final figure formats must be in one of the following: (vectors) .eps, .pdf, .ai or .cdr, and (bitmaps) .bmp, .gif, .tif or .jpg.
As far as plots, block diagrams, schematics etc. are concerned, we suggest to use one of vector formats to improve quality and scalability. Figures in vector formats must be saved using RGB colours and with fully white background (0% K). Hidden layers are unacceptable. Minimum line thickness printed in a single colour is 0.25 pt (0.09 mm), and 1 pt (0.36 mm) when using more colours. Typically we suggest 0.2-0.5 mm but in particular cases the range 0.1–1.0 mm will be accepted. Lines in plots should be distinguished not only by using different colours but also using different line types and markers, if needed.

Equation
All equations must be numbered consecutively throughout the text. Each equation should be preceded and followed by a 6-point spacing. Punctuate equations when they are part of a sentence. Equation numbers should be enclosed in parentheses. Equations should be prepared with the use of MathType or Microsoft Equation editors. The type size in the equation is the same as for the text. To make your equations more compact, you may use the appropriate mathematical symbols or expressions. The symbols used in an equation have to be defined before that equation or immediately after it. Use italics for variables (e.g. i, x, n), physical quantity symbol (e.g. voltage U, temperature T), letter pointers and general function symbols. Do not use italics for constants, indexes, minimum, maximum and trigonometric functions, mathematical operators, differentials, etc. To refer to the equation use “(1)”, not “Eq. (1)” or “equation (1)”, except at the beginning of a sentence where “Equation (1)” should be used. We recommend to use International System of Units SI i.e. metre-kilogram-second system of units. As a decimal separator dot should be used in the entire manuscript (text, figures, tables).

References
The paper has to be clearly positioned in the context of relevant literature in the field of measurements and instrumentation. Note that lack of references from the main field of Metrology and Measurement Systems interest may suggest that the content of manuscript does not exactly correspond to the scope of metrological journals. It may reduce possibility that a proposed paper will be read by audience society. In such a case our Editorial Board may suggest to send the manuscript to a more appropriate journal. Also note that the use of possibly up-to-date references may indicate importance of your work. Table below gives examples of some relevant and renewable journals related to widely understood metrology.

Journal

Publisher

ISSN

Metrologia

IOP Publishing

0026-1394

IEEE Transactions on Instrumentation and Measurement

IEEE

0018-9456

Measurement

Elsevier

0263-2241

Measurement Science and Technology

IOP Publishing

0957-0233

Metrology and Measurement Systems

PAS

0860-8229

Review of Scientific Instruments

IOP Publishing

0034-6748

IEEE Transactions on Industrial Electronics

IEEE

1557-9948

IET Science, Measurement & Technology

IET

1751-8822

Journal of Instrumentation

SISSA, IOP Publishing

1748-0221

Measurement Science Review

Walter de Gruyter

1335-8871

IEEE Instrumentation and Measurement Magazine

IEEE

1094-6969

Bulletin of the Polish Academy of Sciences: Technical Sciences

PAS

2300-1917

Opto-Electronics Review

PAS

1896-3757

IEEE Sensors Journal

IEEE

1558-1748

Sensors

MDPI

1424-8220



References should be inserted in the text in square brackets, i.e. [1]; their list, numbered in citation order, should appear at the end of the manuscript. The format of the references should follow the APA 7th edition formatting style, i.e.: for an journal paper – surname(s) and initial(s) of author(s), year in brackets, title of the paper, full journal name, volume, issue (in brackets) and page numbers. Put all author names unless there are more than 20. Otherwise, after the first 19 authors’ names, use an ellipsis in place of the remaining author names. Then, end with the final author’s name (do not place an ampersand before it).

Submission process
Manuscript should be submitted via the Internet Editorial System (IES) – an online submission and peer review system. In order to submit the manuscript via the IES, the authors (first-time users) must create an author account to obtain a user ID and password required to enter the system. The submission of the manuscript in a single file, i.e. “Article File” containing the complete manuscript (with all figures of high quality and tables embedded in the text), is preferred. All figures have to be uploaded in separate files. The generated PDF file has to be approved. The PDF file has lower quality of the embedded figures to limit its size only.
The submission of a manuscript means that its content has not been published previously, it is not under consideration for publication elsewhere, and that – if accepted – it will not be published elsewhere. The Author hereby grants the Polish Academy of Sciences (the Journal Owner) the license for commercial use of the article according to the Open Access License (CC BY-NC-ND 4.0), which has to be signed before publication. The copyright form is available in the IES.
The Authors are urged to suggest 4 to 5 reviewers in their application (with names, affiliations and addresses) with whom the Editorial Board could co-operate while processing the paper. Proposed reviewers should be experts deeply involved in issues related to the subject matter of the paper and they are intended to come from different universities or research centres.
Each submitted manuscript is subject to a single-blind peer-review procedure, and the publication decision is based on the reviewers’ comments. If necessary, the authors may be invited to revise their manuscripts. On acceptance, manuscripts are subject to editorial amendment to exactly fit the journal style.
An essential criterion for the evaluation of submitted manuscripts is their potential impact on the research field, measured by the number of repeated quotations. Such papers are preferred at the evaluation and publication stages.
Proofs will be sent to the corresponding author by e-mail and should be returned within 48 hours from receipt. The publication in the journal is free of charge. A sample copy of the journal will be sent to the corresponding author free of charge. For colour pages the authors will be charged at the rate of 160 PLN or 80 EUR per page. The payment to the bank account of the main distributor (given in “Subscription Information”) must be completed before the date indicated by the Editorial Office.

Other information
It is possible to include supplementary files related to the article content, such as e.g. developed databases. These files can be then used by other researchers to compare their algorithms using the same input data. For more details about supplementary files please contact the Editorial Board: metrology@wat.edu.pl. The biographical statements, at the very end of the article, are not obligatory, however, they are kindly recommended. Each statement should include the author’s full name and brief personal history focused on areas of research and scientific achievements. The biographical statement may not exceed 100 words and should be written using Times New Roman style with a font size of 8 pt.
The publication of your article is a great achievement but then it needs to be further promoted to make it more visible to the research community. Responsibility for this task lies with the Authors and our Editorial Board. We guarantee free access to the article in the Journals PAN of the Polish Academy of Science, including articles in Early Access form (published just after acceptance decision), indexing in popular and renewable databases (e.g. Thomson Scientific Master Journal List, Elsevier’s Scopus, Google Scholar). Furthermore, selected articles are highlighted on the journal website and are reprinted for promotion at conferences and other events. The Authors can share the final form of the article on various social networks and research-sharing platforms, such as Twitter, Facebook, Linkedin, ResearchGate, Academia.edu, SciProfiles. They are also encouraged to update personal and institutional webpages by adding the title and a link of the article. Feel free also to share your work with your colleagues using any other methods that do not conflict with the CC BY-NC-ND 4.0 license.
For more detailed description about how to write a paper for the Metrology and Measurement Systems journal please look at the Author guidelines for manuscript preparation. We strongly recommend using this file as a template for manuscript preparation.

Polityka Open Access

Metrology and Measurement Systems jest czasopismem wydawanym w wolnym dostępie na licencji CC BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

Metrology and Measurement Systems is an open access journal with all content available with no charge in full text version. The journal content is available under the licencse CC BY-NC-ND 4.0 https://creativecommons.org/licenses/by-nc-nd/4.0/.

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