In this paper, we investigate the problem of designing a spectrum scanning strategy to detect an intelligent Invader who wants to utilize spectrum undetected for his/her unapproved purposes. To deal with this problem we model the situation as two games, between a Scanner and an Invader, and solve them sequentially. The first game is formulated to design the optimal (in maxmin sense) scanning al...

In the aero-optic turbulent boundary layer (TBL), there exist very rich air flow structures that fall into a wide range of scales, with smallest being roughly order optical wavelength. However, these fine spatial variations cannot be neglected when one is dealing light propagation through such structures, since both amplitude and phase wave undergo modulations. this study, we studied influence ...

conclusion this study demonstrated that repeating the tfna procedure in pulmonary lesions improves the diagnostic yield without an increase in the rate of pneumothorax. objectives we aimed to investigate whether repeating ct-guided transthoracic fine needle aspiration (tfna) increases diagnostic yield and complication rate. patients and methods patients underwent tfna and the final diagnoses ac...

background and objectives: we aimed at evaluating the efficacy of fine needle aspiration biopsy (fna) in comparison with histopathology and demonstrating whether cytological study could be a proper diagnostic tool in orbital mass lesions. materials and methods: in a cross sectional study during 36 months, patients referred to our ophthalmologic center affiliated to tehran university of medical ...