Title	Performance of Systematic Distance-4 Codes in Free-Space Optical Communication System
Author	Wamidh Jalil Mazher, Oguz Bayat, and Osman Nuri Ucan
Citation	Vol. 17  No. 12  pp. 5-12
Keywords	LDPC, Hamming distance, systematic coding, FSO, PPM. channel throughput.

Title	Review of the Challenges in SPI Programs
Author	Mohammad AlGhafess
Citation	Vol. 17  No. 12  pp. 1-4
Keywords	Software Process Improvement, Challenges in SPI, Critical Factors for SPI.

Title	Providing a resource scheduling algorithm based on recommender system in order for development of cloud computing
Author	Elnaz Mazaheri, Sasan Berehlia
Citation	Vol. 17  No. 11  pp. 215-225
Keywords	Cloud computing, resource scheduling, resource scheduling algorithm, recommender system

Title	The Introduction of Indigenous Architectural Form of Sanandajʼs Houses (Case study: Ahmad Zadehʼs House)
Author	Himan kaykhosravi, Amirhossein farshchian
Citation	Vol. 17  No. 11  pp. 207-214
Keywords	Indigenous architecture the House sustainable architecture Sanandaj.