| Journal | Issue | Title | |
| International Journal of African and Asian Studies | Vol 71 (2021) | Opportunities and Challenges of Irrigated Crop Production in Dry Land Areas. Review | Abstract PDF |
| Girma Abebe | |||
| Journal of Poverty, Investment and Development | Vol 48 (2019) | Opportunities and Challenges of Private Investment in East Gojjam Zone of Amhara Regional State, Ethiopia | Abstract PDF |
| Megbaru Tesfaw Molla | |||
| Journal of Resources Development and Management | Vol 8 (2015) | Opportunity, Challenge and Achievements of Global Carbon Trading: Review Paper | Abstract PDF |
| Ermias Melaku Addis | |||
| Journal of Tourism, Hospitality and Sports | Vol 68 (2025) | Opportunities and Challenges of Community Participation in Community-Based Ecotourism Development: Wof-Washa National Priority Forest Area | Abstract PDF |
| Shewandagne Alemayehu | |||
| Journal of Law, Policy and Globalization | Vol 29 (2014) | Opposition Movement and Insertion of Undemocratic Provisions in the Constitution of the People’s Republic of Bangladesh: A Critical Analysis. | Abstract PDF |
| Md. Morshedul Islam | |||
| Innovative Systems Design and Engineering | Vol 8, No 3 (2017) | Optical Wireless Communications: Current and Future Trends | Abstract PDF |
| Zouhair Al-qudah | |||
| Journal of Natural Sciences Research | Vol 4, No 5 (2014) | Optical properties of vanadyl phthalocyanine thin films and nonlinear refractive index of vanadyl phthalocyanine doped PMMA by using thermal lens spectrometry technique | Abstract PDF |
| Qusay Mohammed Ali Hassan | |||
| Journal of Natural Sciences Research | Vol 5, No 3 (2015) | Optical Properties of Tin Selenide Thin Films Prepared by Chemical Bath Deposition Technique | Abstract PDF |
| Okoli Donald Nnanyere | |||
| Chemistry and Materials Research | Vol 3, No 7 (2013) | Optical Properties of (PVA-CoCl2) Composites | Abstract PDF |
| Majeed Ali Habeeb, Farhan Lafta Rashid, Saba R. Salman, Hind Ahmed, Ahmed Hashim, Mohamed A. Mahdi | |||
| Chemistry and Materials Research | Vol 3, No 7 (2013) | Optical Properties of (PVA-CrCl2) Composites | Abstract PDF |
| Ahmed Hashim, Amjed Marza, Bahaa H. Rabee, Majeed Ali Habeeb, Nahida Abd-alkadhim, Athraa Saad | |||
| Chemistry and Materials Research | Vol 3, No 9 (2013) | Optical Characterization of Polyvinyl alcohol - Ammonium Nitrate Polymer Electrolytes Films | Abstract PDF |
| Omed Gh. Abdullah, Bakhtyar K. Aziz, Sarkawt A. Hussen | |||
| Chemistry and Materials Research | Vol 7, No 2 (2015) | Optical Properties of Chemical Bath Deposited Magnesium Sulphide Thin Films | Abstract PDF |
| OKOLI D.N. | |||
| Journal of Energy Technologies and Policy | Vol 3, No 5 (2013) | Optical Properties of (Polystyrene-Wood buckthorn Peel) Composites | Abstract PDF |
| Hani Najm Obaid, Angham.G. Hadi, Farhan Lafta, Ahmed. Hashim | |||
| Advances in Physics Theories and Applications | Vol 16 (2013) | Optical Properties of PVA-BaSO4.5H2O Composites | Abstract PDF |
| Raheem G. Kadhim, Mohammed A. Razooqi, Rasha A. Abdullah, Fadhil K. Flaifil | |||
| Advances in Physics Theories and Applications | Vol 24 (2013) | Optical Properties For (PVA- PEG-NiNO3) Composites | Abstract PDF |
| Kaiser mahdy, Salar Hussein Ibrahem, Ahmed Hashim, Hussein Hakim | |||
| Advances in Physics Theories and Applications | Vol 34 (2014) | Optical Properties of Semiconducting Pyrite Deposited by Aerosol Assisted Chemical Vapour Deposition (AACVD) Method | Abstract PDF |
| Christian Nweze | |||
| Advances in Physics Theories and Applications | Vol 14 (2013) | Optical Detection And Spectroscopy Of Single Molecules In A Solid, Quantum Geometry, “Modulation” That Reduce The Noisy Background, Consciousness Continuum, Nine Unsolved Problems in Physics, Concatenation Of Quantum Mechanics And Einstein’s Field Equatio | Abstract |
| K.N.P. Kumar, C.J. Prabhakara, S.K. Narasimha Murthy, B.J. Gireesha | |||
| International Journal of Scientific and Technological Research | Vol 1, No 1 (2015) | Optical Properties of InxGa1-xNyAs1-y/GaAs Heterostructure Quantum Well Lasers for 1.3 µm Laser Emission with Different In/N Concentrations | Abstract PDF |
| Sinan Yasar, Ismail Bilican, Murat Oduncuoglu, Sedat Agan, Ihsan Uluer | |||
| International Journal of Scientific and Technological Research | Vol 7, No 7 (2021) | Optically Stimulated Luminescence and Thermoluminescence Dating Of Samples from Antique Structures in Mardin, Turkey | Abstract PDF |
| Mehmet Kosal, Niyazi Meric | |||
| European Journal of Business and Management | Vol 3, No 3 (2011) | Optimal Two Stage Flow Shop Scheduling to Minimize the Rental Cost including Job Block Criteria, Set Up Times and Processing Times Associated with Probabilities | Abstract PDF |
| Deepak Gupta, Naveen Gulati, Sameer Sharma, Payal Singla | |||
| European Journal of Business and Management | Vol 4, No 6 (2012) | Optimal Pricing and Ordering Policy under Permissible Delay in Payments | Abstract PDF |
| R.P. Tripathi, S.S. Misra, Tarun Tayal | |||
| Research Journal of Finance and Accounting | Vol 4, No 2 (2013) | Optimal Bank Loan Portfolio In Iranian's Banks (Based Linear Programming Modelling) | Abstract PDF |
| Mohammad Javad Mohagheghnia, Mohammad Shirgholami | |||
| Research Journal of Finance and Accounting | Vol 5, No 17 (2014) | Optimal Capital Structure Based on Market Performance of Different Industry Sectors of Listed Companies at Indonesia Stock Exchange | Abstract PDF |
| M. Rustam | |||
| Research Journal of Finance and Accounting | Vol 6, No 20 (2015) | Optimal Taxation of Banks in Financial Sector Regulation in Uzbekistan: Practical Approach | Abstract PDF |
| Odiljon Komolov | |||
| Research Journal of Finance and Accounting | Vol 16, No 7 (2025) | Optimal Portfolio Selection Using the Sharpe Ratio and the Tangency Portfolio Approach: A Long-Term Case Study on the Istanbul Stock Exchange (BIST) | Abstract PDF |
| Mustafa Fatih Boz | |||
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