An International Journal of Optimization and Control: Theories & Applications (IJOCTA) http://ijocta.org/index.php/files <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" /></p> <p>ISSN: 2146-0957<br />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;"><span id="citescoreVal" style="letter-spacing: -2px; display: inline-block; padding-top: 7px; line-height: .75;">1.2</span></div> <div style="float: right; font-size: 14px; padding-top: 3px; text-align: right;"><span id="citescoreYearVal" style="display: block;">2019</span>CiteScore</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;"><span id="citescorePerVal">34th percentile</span></div> </div> <div style="font-size: 12px; text-align: right;">Powered by <img style="width: 50px; height: 15px;" src="https://www.scopus.com/static/images/scopusLogoOrange.svg" alt="Scopus" /></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">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> en-US <p>Articles published in IJOCTA are made freely available online immediately upon publication, without subscription barriers to access. All articles published in this journal are licensed under the Creative Commons Attribution 4.0 International License (<a href="https://creativecommons.org/licenses/by/4.0/legalcode">click here</a> to read the full-text legal code). This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your work will ensure your right to make your work freely and openly available.</p><p>Under the Creative Commons Attribution 4.0 International License, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, and/or copy articles in IJOCTA, so long as the original authors and source are credited.</p><p><strong>The readers are free to:</strong></p><ul><li><strong>Share</strong> — copy and redistribute the material in any medium or format</li><li><strong>Adapt</strong> — remix, transform, and build upon the material</li><li>for any purpose, even commercially.</li><li>The licensor cannot revoke these freedoms as long as you follow the license terms.</li></ul><p><strong>under the following terms:</strong></p><ul><li><strong>Attribution</strong> — You must give <strong>appropriate credit</strong>, provide a link to the license, and <strong>indicate if changes were made</strong>. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.</li></ul><ul><li><strong>No additional restrictions</strong> — You may not apply legal terms or <strong>technological measures</strong> that legally restrict others from doing anything the license permits.</li></ul><p> <a href="http://creativecommons.org/licenses/by/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by/4.0/88x31.png" alt="Creative Commons License" /></a> This work is licensed under a <a href="http://creativecommons.org/licenses/by/4.0/" rel="license" target="_blank">Creative Commons Attribution 4.0 International License</a>.</p> editor@ijocta.org (Prof. Dr. Ramazan YAMAN) fractional_life@hotmail.com (Dr. Derya AVCI) Fri, 02 Apr 2021 15:11:33 +0300 OJS 3.2.1.2 http://blogs.law.harvard.edu/tech/rss 60 Kink and anti-kink wave solutions for the generalized KdV equation with Fisher-type nonlinearity http://ijocta.org/index.php/files/article/view/973 <p>This paper proposes a new dispersion-convection-reaction model, which is called the gKdV-Fisher equation, to obtain the travelling wave solutions by using the Riccati equation method. The proposed equation is a third-order dispersive partial differential equation combining the purely nonlinear convective term with the purely nonlinear reactive term. The obtained global and blow-up solutions, which might be used in the further numerical and analytical analyses of such models, are illustrated with suitable parameters.</p> Huseyin Kocak Copyright (c) 2021 Huseyin Kocak http://creativecommons.org/licenses/by/4.0 http://ijocta.org/index.php/files/article/view/973 Fri, 02 Apr 2021 00:00:00 +0300 UAV routing with genetic algorithm based matheuristic for border security missions http://ijocta.org/index.php/files/article/view/1023 <p class="Abstract1"><span lang="EN-US">In recent years, Unmanned Aerial Vehicles (UAVs) are a good alternative for the problem of ensuring the security of the borders of the countries. UAVs are preferred because of their speed, ease of use, being able to observe many points at the same time, and being more cost-effective in total compared to other security tools. This study is dealt with the problem of the use of UAVs for the security of the Turkey-Syria borderline which becomes sensitive in recent years and the problem is modeled as a UAV routing problem. To solve the problem, a Genetic Algorithm Based Matheuristic (GABM) approach has been developed and 12 scenarios have been created covering the departure bases, daily patrol numbers, and ranges of UAVs. GABM finds the minimum number of UAVs to use in scenarios with the help of a GA run first and tries to find the optimal routes for these UAVs. If GABM can find an optimal route for the determined UAV number, it decreases the UAV number and tries to solve the problem again. GABM proposes a hybrid approach in which a metaheuristic with a mathematical model works together and the metaheuristic sets an upper limit for the number of UAVs in the model. In computational studies, when compared GA with GABM it is seen that GABM has obtained good results and decreased the utilized number of UAVs (up to 400%) and their flight distances (up to 85.99%) for the problem in very short CPU times (max. 122.17 s. for GA and max. 46.39 s. for GABM in addition to GA). </span></p> Omer Ozkan, Muhammed Kaya Copyright (c) 2021 Omer Ozkan, Muhammed Kaya http://creativecommons.org/licenses/by/4.0 http://ijocta.org/index.php/files/article/view/1023 Mon, 19 Apr 2021 00:00:00 +0300 Conic reformulations for Kullback-Leibler divergence constrained distributionally robust optimization and applications http://ijocta.org/index.php/files/article/view/1001 <p>In this paper, we consider a Kullback-Leibler divergence constrained distributionally robust optimization model. This model considers an ambiguity set that consists of all distributions whose Kullback-Leibler divergence to an empirical distribution is bounded. Utilizing the fact that this divergence measure has an exponential cone representation, we obtain the robust counterpart of the Kullback-Leibler divergence constrained distributionally robust optimization problem as a dual exponential cone constrained program under mild assumptions on the underlying optimization problem. The resulting conic reformulation of the original optimization problem can be directly solved by a commercial conic programming solver. We specialize our generic formulation to two classical optimization problems, namely, the Newsvendor Problem and the Uncapacitated Facility Location Problem. Our computational study in an out-of-sample analysis shows that the solutions obtained via the distributionally robust optimization approach yield significantly better performance in terms of the dispersion of the cost realizations while the central tendency deteriorates only slightly compared to the solutions obtained by stochastic programming.</p> Burak Kocuk Copyright (c) 2021 Burak Kocuk http://creativecommons.org/licenses/by/4.0 http://ijocta.org/index.php/files/article/view/1001 Mon, 19 Apr 2021 00:00:00 +0300 Taguchi’s method of optimization of fracture toughness parameters of Al-SiCp composite using compact tension specimens http://ijocta.org/index.php/files/article/view/990 <p class="Abstract1"><span class="Abstract1Char"><span lang="EN-US">The objective of this work is to investigate the process parameters which influence the fracture toughness of aluminum-silicon carbide particulate composite prepared using the stir casting technique. The Taguchi’s design of experiments is conducted to analyze the process parameters. Three parameters considered are composition of material, grain size and a/W ratio. From the Taguchi’s analysis, on compact tension specimens, aluminum 6061 reinforced with 9 wt% of the silicon carbide particles composite and a/W ratio of 0.45 are considered to be optimized parameters. Taguchi's technique result shows that the increment in the a/W ratio causes decrement in the load carrying capacity of the composite. Whereas the fine grain size of silicon carbide have better toughness values. From the ANOVA outcomes it is clear that the composition and a/W ratio of the geometry has more influence on the fracture toughness than the grain size of reinforcement. </span></span></p> Hareesha Guddhur, Chikkanna Naganna, Saleemsab Doddamani Copyright (c) 2021 Hareesha G, Chikkanna N, Saleemsab Doddamani http://creativecommons.org/licenses/by/4.0 http://ijocta.org/index.php/files/article/view/990 Tue, 20 Apr 2021 00:00:00 +0300