http://ijocta.org/index.php/files/issue/feed 2021-08-17T00:00:00+03:00 Prof. Dr. Ramazan YAMAN editor@ijocta.org Open Journal Systems <table> <tbody> <tr> <td width="230"> <p><img title="ijocta_newr_511" src="http://web-kurumsal.balikesir.edu.tr/~ijocta/public/site/images/ikucukkoc/ijocta_newr_511.png" alt="ijocta_newr_511" width="163" height="211" /><br />ISSN: 2146-0957, eISSN: 2146-5703</p> </td> <td> <p><strong>Aims and Scope</strong><br />This journal shares the research carried out through different disciplines in regards to optimization, control and their applications.<br />The basic fields of this journal are linear, nonlinear, stochastic, parametric, discrete and dynamic programming; heuristic algorithms in optimization, control theory, game theory and their applications.<br />Problems such as managerial decisions, time minimization, profit maximizations and other related topics are also shared in this journal.<br />Besides the original research articles expository papers, which are hard to express or model, conference proceedings, book reviews and announcements are also welcome.</p> <p><strong>Journal Topics</strong> <br />Applied Mathematics, Financial Mathematics, Control Theory, Game Theory, Fractional Calculus and Applications, Modeling of Bio-systems for Optimization and Control, Linear Programming, Nonlinear Programming, Stochastic Programming, Parametric Programming, Conic Programming, Discrete Programming, Dynamic Programming, Nonlinear Dynamics, Stochastic Differential Equations, Optimization with Artificial Intelligence, Operational Research in Life and Human Sciences, Heuristic Algorithms in Optimization, Applications Related to Optimization on Engineering.</p> </td> </tr> <tr> <td> <div style="height: 100px; width: 180px; font-family: Arial, Verdana, helvetica, sans-serif; background-color: #ffffff; display: inline-block;"> <div style="padding: 0px 16px;"> <div style="padding-top: 3px; line-height: 1;"> <div style="float: left; font-size: 28px;"><a title="CiteScore" href="https://www.scopus.com/sourceid/21100860443?origin=resultslist" target="_blank" rel="noopener"><span id="citescoreVal" style="letter-spacing: -2px; display: inline-block; padding-top: 7px; line-height: .75;">1.7</span></a></div> <div style="float: right; font-size: 14px; padding-top: 3px; text-align: right;"><a title="CiteScore" href="https://www.scopus.com/sourceid/21100860443?origin=resultslist" target="_blank" rel="noopener"><span id="citescoreYearVal" style="display: block;">2020</span>CiteScore</a></div> </div> <div style="clear: both;"> </div> <div style="padding-top: 3px;"> <div style="height: 4px; background-color: #dcdcdc;"> <div id="percentActBar" style="height: 4px; background-color: #007398;"> </div> </div> <div style="font-size: 11px;"><a title="CiteScore" href="https://www.scopus.com/sourceid/21100860443?origin=resultslist" target="_blank" rel="noopener"><span id="citescorePerVal">42nd percentile</span></a></div> </div> <div style="font-size: 12px; text-align: right;"><a title="CiteScore" href="https://www.scopus.com/sourceid/21100860443?origin=resultslist" target="_blank" rel="noopener">Powered by <img style="width: 50px; height: 15px;" src="https://www.scopus.com/static/images/scopusLogoOrange.svg" alt="Scopus" /></a></div> </div> </div> <!---- ---> <p> <a title="SCImago Journal &amp; Country Rank" href="https://www.scimagojr.com/journalsearch.php?q=21100860443&amp;tip=sid&amp;exact=no"><img src="https://www.scimagojr.com/journal_img.php?id=21100860443" alt="SCImago Journal &amp; Country Rank" border="0" /></a></p> <p><strong><br />EDITOR IN CHIEF</strong> </p> <p><span style="color: #306754;"><a target="_blank">YAMAN, Ramazan</a> </span><br />Istanbul Atlas University / Turkey</p> <p><strong>AREA EDITORS</strong><br /><strong>Applied Mathematics &amp; Control</strong><br /><span style="color: #306754;"><a target="_blank">OZDEMIR, Necati</a></span> <br />Balikesir University / Turkey</p> <p><strong>Engineering Applications</strong><br /><span style="color: #306754;"><a target="_blank">DEMIRTAS, Metin</a> </span><br />Balikesir University / Turkey</p> <p><span style="color: #306754;"><a target="_blank">MANDZUKA, Sadko</a> </span><br />University of Zagreb / Crotia</p> <p><strong>Fractional Calculus &amp; Applications</strong><br /><span style="color: #306754;"><a target="_blank">BALEANU, Dumitru</a> </span><br />Cankaya University / Turkey <br /><br /><span style="color: #306754;"><a target="_blank">POVSTENKO, Yuriy</a> </span><br />Jan Dlugosz University / Poland</p> <p><strong>Optimization &amp; Applications </strong><br /><span style="color: #306754;"><a target="_blank">WEBER, Gerhard Wilhelm</a> </span><br />Poznan University of Technology / Poland</p> <p><a target="_blank">KUCUKKOC, Ibrahim</a><br />Balikesir University / Turkey </p> <p> </p> <p> </p> <p> </p> </td> <td> <p><strong> Editorial Board </strong><br /><span style="color: #306754;"><a target="_blank">AGARWAL, Ravi P.</a> </span>- Texas A&amp;M University Kingsville / USA<br /><span style="color: #306754;"> <a target="_blank">AGHABABA, Mohammad P.</a></span> - Urmai University of Tech. / Iran<br /><span style="color: #306754;"><a target="_blank">ATANGANA, Abdon</a></span> - University of the Free State / South Africa<br /><span style="color: #306754;"> <a target="_blank">AYAZ, Fatma</a></span> - Gazi University / Turkey<br /><span style="color: #306754;"> <a target="_blank">BAGIROV, Adil</a></span> - University of Ballarat / Australia<br /><span style="color: #306754;"><a target="_blank">BATTINI, Daria</a> </span>- Universita degli Studi di Padova / Italy<br /><span style="color: #306754;"><a target="_blank">BOHNER, Martin</a></span><span style="color: #306754;"> </span>- Missouri University of Science and Technology / USA<br /><span style="color: #306754;"><a target="_blank">CAKICI, Eray</a></span> - IBM / Germany<br /><span style="color: #306754;"><a target="_blank">CARVALHO, Maria Adelaide Pinto dos Santos</a></span> - Institute of Miguel Torga / Portugal<br /><span style="color: #306754;"><a target="_blank">CHEN, YangQuan</a></span> - University of California Merced / USA <br /><span style="color: #306754;"><a target="_blank">DAGLI, Cihan H.</a> </span>- Missouri University of Science and Technology / USA<br /><span style="color: #306754;"><a target="_blank">DAI, Liming</a> </span>- University of Regina / Canada<br /><span style="color: #306754;"><a target="_blank">EVIRGEN, Firat</a></span> - Balikesir University / Turkey<br /><span style="color: #306754;"><a target="_blank">GURBUZ, Burcu </a></span>- Johannes Gutenberg-University Mainz / Germany<br /><span style="color: #306754;"><a target="_blank">HRISTOV, Jordan</a> </span>- University of Chemical Technology and Metallurgy / Bulgaria<br /><span style="color: #306754;"><a target="_blank">ISKENDER, Beyza B.</a> </span>- Balikesir University / Turkey<br /><span style="color: #306754;"> <a target="_blank">JONRINALDI, J.</a> </span>- Universitas Andalas, Padang / Indonesia<br /><span style="color: #306754;"> <a target="_blank">JANARDHANAN, M. N.</a> </span>- University of Leicester / UK <br /><span style="color: #306754;"> <a target="_blank">KARAOGLAN, Aslan Deniz</a></span> - Balikesir University / Turkey<br /><span style="color: #306754;"><a target="_blank">KATALINIC, Branko</a> </span>- Vienna University of Technology / Austria<br /><span style="color: #306754;"><a target="_blank">MACHADO, J. A. Tenreiro</a> </span>- Polytechnic Institute of Porto / Portugal<br /><span style="color: #306754;"><a target="_blank">NANE, Erkan</a> </span>- Auburn University / USA <span style="color: #306754;"><br /></span> <span style="color: #306754;"><a target="_blank">PAKSOY, Turan</a> </span>- Selcuk University / Turkey <br /><span style="color: #306754;"><a target="_blank">SULAIMAN, Shamsuddin</a> </span>- Universiti Putra Malaysia / Malaysia<br /><span style="color: #306754;"><a target="_blank">SUTIKNO, Tole</a> </span>- Universitas Ahmad Dahlan / Indonesia<br /><span style="color: #306754;"><a target="_blank">TABUCANON, Mario T.</a> </span>- Asian Institute of Technology / Thailand<br /><span style="color: #306754;"><a target="_blank">TEO, Kok Lay</a> </span>- Curtin University / Australia<br /><span style="color: #306754;"><a target="_blank">TORIJA, Antonio J.</a> </span>- University of Granada / Spain<br /><span style="color: #306754;"><a target="_blank">TRUJILLO, Juan J.</a></span> - Universidad de La Laguna / Spain <br /><span style="color: #306754;"><a target="_blank">WANG, Qing</a></span> - Durham University / UK<br /><span style="color: #306754;"><a target="_blank">XU, Hong-Kun</a> </span>- National Sun Yat-sen University / Taiwan<br /><span style="color: #306754;"><a target="_blank">YAMAN, Gulsen</a> </span>- Balikesir University / Turkey<span style="color: #306754;"><br /></span><span style="color: #306754;"><a target="_blank">ZAKRZHEVSKY, Mikhail V.</a> </span>- Riga Technical University / Latvia<br /><span style="color: #306754;"><a target="_blank">ZHANG, David Z.</a> </span>- University of Exeter / UK </p> <p><strong>Technical Editor</strong><br /><span style="color: #306754;"><a target="_self">AVCI, Derya</a> </span>- Balikesir University, Turkey</p> <p><strong>English Editors<br /></strong><span style="color: #306754;"><a target="_blank">INAN, Dilek</a> </span>- Izmir Democracy University / Turkey<br /><a href="mailto:%20sertacturgal@gmail.com" target="_blank" rel="noopener">TURGAL, Sertac</a> - National Defence University / Turkey</p> </td> </tr> </tbody> </table> http://ijocta.org/index.php/files/article/view/1100 2021-07-15T08:51:08+03:00 Jordan Hristov jordan.hristov@mail.bg

<p>The paper addresses diffusion approximations of magnetic field penetration of ferromagnetic materials with emphasis on fractional calculus applications and relevant approximate solutions. Examples with applications of time-fractional semi-derivatives and singular kernel models (Caputo time fractional operator) in cases of field independent and field-dependent magnetic diffusivities have been developed: Dirichlet problems and time-dependent boundary condition (power-law ramp). Approximate solutions in all theses case have been developed by applications of the integral-balance method and assumed parabolic profile with unspecified exponents. Tow version of the integral method have been successfully implemented: SDIM (single integration applicable to time-fractional semi-derivative model) and DIM (double-integration model to fractionalized singular memory models). The fading memory approach in the sense of the causality concept and memory kernel effect on the model constructions have been discussed.</p>

2021-08-17T00:00:00+03:00 Copyright (c) 2021 Jordan Hristov