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Linear Accelerator를 이용한 Stereotactic Radiosurgery
정상섭,윤도흠,오성훈,김선호,서창옥,추성실,노준규,김동익,서정호 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6
A Modified irradiation technique utilizing a linear accelerator for radiation surgery within the brain was performed in 4 patients. Three of them had brain tumors and one small arteriovenous malformation in midbrain. A Hitchcock stereotactic apparatus and a 10 MeV linear accelerator have been adapted and special computer programs for dosimetry were obtained and studied experimentally with a phantom model. Stereotactic radiosurgery is a valuable tool in the treatment of inoperable, deep seated intracranial lesions, the major advantage being high efficacy and smoothness of the procedure, as well as short hospitalization times.
Absorption cross section in warped AdS<sub>3</sub> black hole
Oh, John J.,Kim, Wontae IOP Publishing Ltd 2009 Journal of high energy physics Vol.2009 No.1
The absorption cross section is studied in the low-frequency region for a propagating scalar field under the warped AdS<SUB>3</SUB> black hole background in the { cosmological} topologically massive gravity. It can be shown that the absorption cross section is { unexpectedly} deformed by the gravitational Chern-Simons term, which is proportional to the scattering area of black hole with an additional contribution depending on the combinations of left-moving and right-moving temperatures. It means that the cross section is larger than the area in spite of the s-wave limit. Finally, we discuss the left-right quasinormal modes for the scalar perturbation in this black hole.