List of Articles Opposition-based learning Open Access Article Abstract Page Full-Text 1 - EMCSO: An Elitist Multi-Objective Cat Swarm Optimization Maysam Orouskhani Mohammad Teshnehlab Mohammad Ali Nekoui 10.22094/joie.2017.500.12 Open Access Article Abstract Page Full-Text 2 - An improved opposition-based Crow Search Algorithm for Data Clustering Rogayyeh Jafari Jabal Kandi Farhad Soleimanian Gharehchopogh Open Access Article Abstract Page Full-Text 3 - A Genetic-based Discrete Metaheuristic Algorithm for Controller Placement in Software-Defined Network mahnaz khojand Kambiz Majidzadeh mohammad masderi yousef farhang