the optimal fractionation schedule for radiotherapy of head and neck cancer has been controversial. the objective of this randomized trial was to test the efficacy of hyperfractionation vs. standard fractionation. patients with squamous cell carcinoma of head and neck organs were randomly assigned to receive radiotherapy delivered with a) standard fractionation at 2 gy/fraction/day, 5 days/week...

granular cell tumor is a rare benign neoplasm most commonly appears in the head and neck region, especially in the tongue, cheek mucosa, and palate. occurrence in limbs is even rarer. these tumors account for approximately 0.5% of all soft tissue tumors. granular cell tumor can also affect other organs including skin, breast, and lungs. local recurrence and metastasis is potentially higher in m...

In seismically retrofitted reinforced concrete (RC) structures, new members are connected to existing using interfaces with roughened surfaces and post-installed dowel bars. During an earthquake, the subjected cyclic shear normal stresses. Therefore, structural design of is essential. a previous study, loads were applied interface specimens. Moreover, strength estimation method was proposed; ho...