부비동 전산화단층촬영법

전시영,김형진,황의기,정필섭,마용운 釜算慶南耳鼻咽喉科學會 1990 임상이비인후과 Vol.1 No.2

두부외상환자에서 부비동 이물을 동반한 전두동 점액낭종 1예

전시영 대한비과학회 2005 Journal of rhinology Vol.12 No.2

빈도해석시 극치강우사상의 확률분포

전시영,김재영 圓光大學校 環境建設硏究所 1997 環境建設論文集 Vol.6 No.-

In this study, we use the method of L-moment to evaluate estimators of the parameters and quantiles of nine probability distributions, namely, the Gamma, Generalized Extremal Value, Generalized Logistic, Generalized Normal, Generalized Pareto, Gumbel, Normal, Pearson Type III and Wakeby distributions. L-moment ratio diagrams for these nine distributions are constructed for extreme historical events at 11 rainfall gaging sites of the Jinan stream, which is a tributary located in the Geum river basin. Comparisons of distributions selected were based on the goodness of fit tests such as probability plot correlation coefficient(PPCC) in fit and root mean square deviation(RMSD) and L-moment ratio diagrams. The results are found that 4 or 5 parameters Wakeby(WAK) and Pearson Type III(PE3) distributions for frequency analysis provide the best approximation to the extreme rainfall data based on both goodness of fit analysis and L-moment ratio diagrams analysis.

접형동에 국한된 병소의 임상 양상

전시영,김진평 대한비과학회 2005 Journal of rhinology Vol.12 No.2

Background and Objectives:Isolated sphenoid lesion (ISL) is rare due to its anatomic location in the nasal cavity. The recent advances in the diagnosis with CT and MRI make it easier to diagnose ISL. We experienced 15 cases of ISL and reviewed their clinical characteristics. Materials and Methods : Patients with ISL admitted from January 1998 through April 2004 were retrospectively reviewed. Patients’ clinical symptoms, endoscopic and radiologic findings, treatment modalities, postoperative diagnosis, and the outcomes were analyzed. Results:The most common symptom was headache presented in 9 patients, followed by nasal symptoms in 4 patients. Five of 15 cases were acute sphenoiditis which was improved with antibiotic trials. The other 10 cases were treated by endoscopic sphenoidotomy. Postoperative pathology showed 4 cases of fungal ball, and 3 cases of mucocele, 3 cases of chronic sphenoiditis. Conclusion:Headache and orbital symptom were the most common presentation in patients with ISL. Endoscopic and radiologic findings were not pathognomonic to diagnose ISL in most cases. Antibiotic trials should be preceded, and then followed by endoscopic sphenoidotomy in the refractory cases. Loss of vision or light reflex may predict a poor rognosis.

매개변수적 방법과 비매개변수적 방법에 의한 확률강우량의 비교·분석

전시영,김민구 圓光大學校 環境建設硏究所 1999 環境建設論文集 Vol.8 No.-

This study is to perform frequency analysis with annual maximum rainfall data at 10 gaging sites using both parametric and nonparametric methods. The estimation of parameters for those methods used the L-Moment method which was developed by Hosking among several parametric methods and the kernel-based function as nonparametric method. To apply the parametric methods, ten probability distributions are also evaluated based on the goodness of fit tests, i.e., probability plot correlation coefficient(PPCC), root mean square deviation(RMSD) and Koimogorov-Smirnov(K-S) test, and on the L-Moment ratio diagrams. the estimated T-vear quantiles based on kernel-based function of nonparametric method are compared with those based on ten probability distributions using method of the L-Moment by parametric one. Based on the relative percentage error corresponding to return periods of 2 through 200 years. T-year quantiles estimated by GEV, PE3 and WAK distributions selected using the goodness of fit tests and the L-Moment ratio diagrams for ten probability distributions of parametric method are the best to those by kernel function of nonparametric one.

Log Pearson 3형 분포매개변수의 분산.공분산 비교

전시영,김민구,이종국 한국수자원학회 1999 한국수자원학회 학술대회 Vol.1999 No.1

國內旣存 合成單位流量圖 比較分析

전시영 圓光大學校 環境建設硏究所 1996 環境建設論文集 Vol.5 No.-

우리나라 22개의 流域에 대한 SCS 및 Nakayasu 형 合成單位流量圖의 媒介變數는 代表單位流量圖를 이용한 回歸分析으로부터 誘導되며, 이들로부터 구한 합성단위유량도와 대표단위유량도를 비교하였다. 이들중 選定된 4개 流域의 합성단위유량도는 建設技術硏究院에서 제안한 Snyder 및 HYMO의 합성단위유량도와 비교하였다. SCS 方法에서 水系別보다는 全體 流域으로 회귀분석한 遲滯時間으로부터 推定된 합성단위유량도의 尖頭流量이 보청천유역을 제외하고 대표단위유량도의 첨두유량값을 개선하였으며, 尖頭時間은 이와 반대로 나타났다. 修正 Nakayasu 型에서 全體 流域보다는 水系別로 회귀분석한 지체시간으로부터 추정된 합성단위유량도가 위천유역을 제외하고 Nakayasu의 합성단위유량도보다는 대표단위유량도에 비교적 접근하였다. 修正 Nakayasu 型의 합성단위유량도는 전체 유역과 수계별에서 Nakayasu의 합성단위유량도보다는 대표단위유량도를 훨씬 더 잘 나타낸다는 것을 알 수 있었다. Parameters for the Synthetic Unit Hydrograph(SUH) using SCS and Nakayasu methods(including modified type) are derived by regression analysis of the Representative Unit Hydrograph(RUH) of 22 basins in Korea. These derived SUHs were compared with the RUHs and those of Snyder and HYMO given by the Korea Institute of Construction Technology (KICT) for selected 4 basins. In SCS method, when correlated with the lag time of SUHs based on the whole basin rather than on the riverwise basins the peak discharge(excluding Bocheng stream)is close to that of RUH. But the peak time given by riverwise basins agrees closer to the RUH than by the whole basins. The modified Nakayasu type SUH(excluding Wi stream) associated with lag time based on riverwise basins gives better agreements to the RUH than that of Nakayasu method. And the modified Nakayasu type SUH gives much better agreement to the RUH than that of Nakayasu method for the case of both whole and riverwise basins.

혼합모멘트방법에 의한 제3형 Log Pearson 분포의 T년 quantiles의 비교

전시영 한국수자원학회 1995 한국수자원학회 학술대회 Vol.1995 No.1

Hemangioma Involving the Nasal Cavity and Maxillary and Ethmoidal Sinuses

전시영,안승기,황의지,정태지,김형진 대한비과학회 1996 Journal of rhinology Vol.3 No.2

Hemangiomas involving the paranasal sinuses are rare. The tumors are described as well circumscribed, intensely enhancing masses, causing benign-appearing bone changes on CT scans. CT scans show a large, nonhomogenously enhancing mass with remarkable bone erosion, which makes it difficult to differentiate it from malignant epithelial tumors on the basis of the radiologic finings. Medial maxillectomy by a midface degloving procedure or a lateral rhinotomy with lip splitting has been performed for surgical excision. Massive intraoperative bleeding could be avoided by adjunctive preoperative embolization or by intraoperative ligation of the external carotid artery. We report three cases of hemangiomas involving the nasal cavity and the maxillary and ethmoidal sinuses, presenting with refractory epistaxis and easily bleeding, friable intranasal masses.

Enhancement of Microvascular Leakage in the Nasal Mucosa after Re-exposure to Capsaicin in a Rat Model Challenged/Rechallenged with Capsaicin

전시영,김은아,성종화,김진평,정태기,황의기 대한비과학회 2000 Journal of rhinology Vol.7 No.2

It has been suggested that the role of neurogenic inflammation is to protect the airway from various noxious irritants ininhaled air. Repeated exposure to various irritating stimuli has become very common in daily life. However, the process thatoccurs in neurogenic inflammation after repeated exposure to irritating stimuli is not yet clearly understood. The aim of thisstudy was to investigate the changes of microvascular leakage in the airways after re-exposure to capsaicin in an experimentusing a rat model challenged/rechallenged with capsaicin. Twenty-four Sprague-Dawley rats were divided into four groups:acapsaicin-challenged group (10 μg/kg of capsaicin, intravenous, n=6) and three capsaicin-rechallenged groups (10 μg/kgof capsaicin, intravenous, n=6 in each group) corresponding to time intervals of 1, 3, or 6 hours after capsaicin-challenge. Theamount of microvascular leakage in the nasal mucosa and trachea of the animal in each group was measured with extravasationof Evans blue dye (30 mg/kg, intravenous) using a spectrophotometer. In the nasal mucosa, a significant enhancement ofmicrovascular leakage with capsaicin-rechallenge was observed at 3 hours after capsaicin-challenge (AVOVAR, *:p<0.01). However, there was no significant changes in the trachea. In conclusion, the protective mechanisms against repeated irritatingstimuli in the nasal mucosa and trachea are different. After exposure to a noxious irritant, the airway defense mechanismmediated by an axon reflex in the nose may be up-regulated, while that in the trachea may not be changed.