medical linear accelerators are one of the most widespread methods for cancer treatment. despite their advantages, unwanted photoneutrons are produced by high energy linacs. this photoneutrons are as undesired doses to patients and a significant problem for radiation protection of the staffs and patients. photoneutrons radiological risk must be evaluated because of their high let and range.in o...

Introduction: One of the concerns about using of high energy photons in radiotherapy is neutron contamination production. The threshold energy of photoneutron production in most materials with high atomic number is about 7MeV. Therefore, it seems to be logical that the main components with high atomic number elements used in the LINAC head have a large contribution to the neutr...

Medical linear accelerators are one of the most widespread methods for cancer treatment. Despite their advantages, unwanted photoneutrons are produced by high energy linacs. This photoneutrons are as undesired doses to patients and a significant problem for radiation protection of the staffs and patients. Photoneutrons radiological risk must be evaluated because of their high LET and range.in o...

Oriented strand board is a widely used construction material responsible for substantial portion of the fire load many buildings. To accurately model oriented response, kinetics and thermodynamics its thermal decomposition combustion were carefully characterized using milligram-scale testing in part I this study. In current work, Controlled Atmosphere Pyrolysis Apparatus II tests performed on r...

Induction motors (IMs) have widely been regarded as one of the most suitable options in automotive industry for electric propulsion systems of hybrid electric vehicles (HEVs) due to their reliability, ruggedness and low cost. In the past, poor dynamic response of IMs was a key constraint that limited their capability in applications that require speed tracking and fast positioning. However, the...