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Darboux transforms and orthogonal lynomials
윤강준 대한수학회 2002 대한수학회보 Vol.39 No.3
We give a new interpretation of Darboux transforms in the contextof orthogonal polynomials and find conditions in order for anyDarboux transform to yield a new set of orthogonal polynomials.We also discuss connections between Darboux transforms andfactorization of linear differential operators which haveorthogonal polynomial eigenfunctions.
40세 여자 환자에서 하지의 불인성 동통을 동반한 Tethered Spinal Cord 1례 : Case Report
윤강준,이규호,정봉섭,오세문,강성구 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.4
A 40-year-old female patient who had tethered spinal cord with intraspinal lipoma and intractable pain of the lower leg and foot is reported. The pain started 5 years ago and exaggerated recently. A pea-size mass had been noted since birth at sacral region, which was excised 2 months prior to admission at the other clinic. Neurological examination revealed diffuse muscular wasting of the left foot, especially the sole, hypesthesia of the left sole with dysesthesia, bilaterally increased knee jerks, and absent left ankle jerk. The patient underwent L5 laminectomy, subtotal removal of extradural, intradural and intramedually lipoma with dural repair, and dorsal rhizotomy of ipsilateral L5 and S1 roots. At surgery, the neural elements were untethered with mass removal, adhesiolysis, and division of thickened arachnoid septum. The pain improved much after surgery and was tolerable with some analgesics.