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허원,장철수 대한피부과학회 1970 大韓皮膚科學會誌 Vol.8 No.2
A case of Peutz-Jeghers syndrome was experienced with melanin pigmentation in the oral cavity and lips associated small intestine polyposis. Diagnosis of Peutz-Jeghers syndrome was established by clinical characteristics of skin and X-ray studies of gastrointestinal tracts.
허원,윤준모 대한피부과학회 1970 大韓皮膚科學會誌 Vol.8 No.2
Cutis laxa is a rarely discussed entity which manifests itself primarily as loose redundant skin and may be accompanied by internal anomalies. Localized cutis laxa is involved to the ear lobules, eyelids an lips in 34 years old male was described. Diagnosis of localized cutis laxa was established by clinical characteristic manifestations and histopathological studies.
An Artificial Neural Network for Biomass Estimation from Automatic pH Control Signal
허원,Yoon-Keun Chung 한국생물공학회 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4
This study developed an artificial neural network (ANN) to estimate the growth of microorganisms during a fermentation process. The ANN relies solely on the cumulative consumption of alkali and the buffer capacity, which were measured on-line from the on/off control signal and pH values through automatic pH control. The two input variables were monitored on-line from a series of different batch cultivations and used to train the ANN to estimate biomass. The ANN was refined by optimizing the network structure and by adopting various algorithms for its training. The software estimator successfully generated growth profiles that showed good agreement with the measured biomass of separate batch cultures carried out between at 25 and 35°C.
허원,박인성,이철희,한종우 대한뇌혈관외과학회 2011 Journal of Cerebrovascular and Endovascular Neuros Vol.13 No.2
Objective : A dural arteriovenous fistula (DAVF) of the anterior cranial fossa is rare. We report a case of a DAVF of the anterior cranial fossa which was treated surgically, following endovascular treatment failure. Methods & Results : The subject was a 53-year-old male with a headache caused by a hematoma in the right frontal lobe. A vascular abnormality of the anterior cranial fossa was suspected on brain computed tomographic angiography. The subsequent transfemoral cerebral angiography revealed that the AVF of the anterior cranial fossa was mainly fed by the left anterior ethmoidal artery. Endovascular therapy using N-butyl cyanoacrylate was attempted. However, the procedure failed to occlude the fistula due to the existing feeding artery (the right anterior ethmoidal artery). Consequently, a surgical approach was undertaken and the lesion was successfully obliterated. Conclusion : We report a rare case of an intracerebral hematoma caused by a DAVF,which was successfully managed surgically following, endovascular treatment failure.