List of Articles SNR Open Access Article Abstract Page Full-Text 1 - Investigation of Effective Parameters for Improvement of OSNR and Increasing of the Channel Capacity in Optical Communication Systems Majid Malekian Hossein Emami Mohsen Ashourian Manuscript profile Open Access Article Abstract Page Full-Text 2 - Presenting a New Steganography Method Based on Wavelet Transform in Gray Image Vahidreza Soltaninia Saeed Talati Seyed Mahdi Khatmi Kazem Ghaffari 10.30486/mjtd.2023.1983555.1031 Manuscript profile Open Access Article Abstract Page Full-Text 3 - Audio Signal Encryption Based on Permutation Relations and Residue Number System Fereshteh Ghanbari Adivi Mohammad Mehrnia Manuscript profile