recently, transverse flux permanent magnet generators (tfpmgs) have been proposed as a possible generator in direct drive variable speed wind turbines due to their unique merits. generally, the quality of output power in these systems is lower than multi stage fixed speed systems, because of removing the gears, so it’s important to design these kinds of generators with low ripple and lowest har...

TESTING IS NO longer good enough to ensure the quality of systems that must never fail. A highly reliable system must be able to detect and usually correct faults arising from test escapes, from aging or from the environment. For the most part, this has been done using techniques such as parity, error correcting codes, and redundancy. In particular, memories are designed with technologies so sm...

in this research, a new technetium-99m generator has been developed with addition of cerium oxide to alumina column.  the adsorption behaviors of 99mo in the form of molybdate and 99mtc in the form of pertechnetate on ceo2/al2o3 was investigated and showed that the adsorption capacity of molybdate on this generator is higher than usual generator using al2o3. ceric ions were selected as an addit...

background: hot lab is a specially designed room in a nuclear medicine hospital where the radiopharmaceuticals are delivered, stored and prepared for dispensing. 99mo/99mtc-generator is the major source in the hot lab used for various medical imaging. it is important to maintain a standard for hot lab procedures to optimize the patient care and minimize radiation exposure to all nuclear medicin...

introduction: a cleft lip with or without a cleft palate is one of the major congenital anomalies observed in newborns. this study explored the risk factors for oral clefts in gorgan, northern iran.  materials and methods: this hospital-based case-control study was performed in three hospitals in gorgan, northern iran between april 2006 and december 2009. the case group contained 33 newborns wi...

This study presents a designing process for refurbishing of a 32 MW rotor-generator damaged coupling. The reason of rotor damage was being hit by the quivers of an explosion. The original coupling was union with the rotor formed after a machining process on a mono block forged rotor. In some areas imposed damages caused the breaking off and detachment of some parts in the coupling flange. Becau...