Vol 12 No. 1

No.	Title	Page
1	Nano-Scale Vee Yagi-UDA Antenna Based Nano Shell-Silver Coated Sillica for Tunable Solid –State Laser Applications Taha A. Elwi¹and Yahiea Alnaiemy² ¹Department of Communication, Al-Mammon University College ²Department of Computer, College of Science, University of Diyala taelwi82@gmail.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/1	1-6
2	Effect of Ambient Air Temperature on the Performance of Petrol Engine Dr. Ramzi R. Ibraheem¹, Kawa A. Abdullah² ¹Assistant professor, ²Lecturer Department of Mechanical Engineering, College of Engineering, University of Salahaddin. ramzi.Ibraheem@su.edu.krd, kawa.abdullah@su.edu.krd Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/2	7-11
3	Contact and Inter-laminate Stresses Minimization in Laminated Leaf Springs Zaid S. Hammoudi Department of Mechanical Engineering, College of Engineering, University of Diyala zshaaa@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/3	12-22
4	Behaviour of Unsaturated Subgrade Soil Under Highway Load Hanan Adnan Hassan Afaj ¹, Hadeel Amaar Mohammed ¹, Ghassan Nasser Jaffer ² ¹Department of Highway and Transportation Engineering, Al-Mustansiriayah University ²General company for trade construction material, Baghdad, Iraq ghassan_hanan@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/4	23-33
5	Simulation of the Incremental Conductance Algorithm for Maximum Power Point Tracking of Photovoltaic System Based On Matlab Parween R.Kareem Department of Electrical tech. Haweeja Tech. Inst., Northern Technical University parweenraheem3@gmail.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/5	34-43
6	Experimental and Simulation Investigation of Bending Moment Effect on Hollow Columns of Multi-layers of Hybrid Materials Ayad A. Ramadhan Department of Mechanical Engineering, Al-Hawija Technical Institute, Northern Technical University ayad_almuhndis@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/6	44-55
7	Obstacle Avoidance Techniques for Robot Path Planning Arif A. AL-Qassar, Ali N. Abdulnabi ¹Department of Control and system Engineering, University, of Technology alinajem18@yahoo.com, arifqassar@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/7	56-65
8	Optical Fiber Amplifiers: Optimization and PerformanceEvaluation A. k. Abass^{, 1}, Mohammed J. Abdul-Razak¹, Haneen H. Mohammed¹, Suad M. Kadhim¹, Mohammed A. Salih ² ¹Laser Engineering Branch, Laser and Optoelectronics Engineering Department, University of Technology* ²Education College, University of Al-Iraqia *corresponding author: email address: 140042@uotechnology.eu.iq Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/8	66-72
9	Effect of Construction Type on Structural Behaviour of R.C Bubbled One-Way Slab Amer M. Ibrahim^,1, Murtada A. Ismael², Humam A. Abdul Hussein³ ¹Department of Civil Engineering, College of Engineering, Diyala University, Diyala, Iraq.* ²Department of Civil Engineering, College of Engineering, Diyala University, Baghdad, Iraq. ³Department of Civil Engineering, College of Engineering, Diyala University, Diyala, Iraq. Amereng76@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/9	73-79
10	Shear behavior of reinforced concrete wide beams strengthened with CFRP sheet without stirrups Ali Laftah Abass ¹, Yousif Rasheed Hassan ² ^1,2Department of Civil Engineering, College of Engineering, Diyala University alilaftast76@yahoo.com Fulltext-Abstract /DOI: 10.26367/DJES/VOL.12/NO.1	80-98
11	Flow Separation Control of Backward-Facing Step Airfoil NACA0015 by Blowing Technique Khuder N. Abed Department of Mechnical Engineering, College of Engineering, University of Diyala Khuder@engineering.uodiyala.edu.iq Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/10	99-119
12	Performance Comparison of MIMO Technology over LTE-A System Khalid Hussein Rashid, Ashwaq Q.Hameed Department of ElectricalEngineering, TechnologyUniversity khalidhussein24@yahoo.com, aza-2004r@yahoo.com Fulltext-Abstract DOI: 10.26367/DJES/VOL.12/NO.1/12	120-125