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조상현 대한수학회 2021 대한수학회보 Vol.58 No.3
\noindent Let $\Omega $ be a smoothly bounded pseudoconvex domain in $\cn $ and assume that the $(n-2)$-eigenvalues of the Levi-form are comparable in a neighborhood of $z_0\in \bo$. Also, assume that there is a smooth 1-dimensional analytic variety $V$ whose order of contact with $\bo$ at $z_0$ is equal to $\eta$ and $\Delta_{n-2}(z_0)<\infty$. We show that the maximal gain in H\"older regularity for solutions of the $\dbar$-equation is at most $\frac {1}{\eta}$.
조상현,박주완,정성근,Sang Hyun Cho,Joo Wan Park,Sung Kun Chung 대한안과학회 2008 대한안과학회지 Vol.49 No.1
`Purpose: To determine the risk factors of corneal ulcers that require eyeball removal even when properly managed. Methods: We performed a retrospective review of 30 patients (30 eyes) who were diagnosed with corneal ulcers and underwent eyeball removal, even though their cases were properly managed, between 1990 and July, 2005. The Patients included of 14 males and 16 females. The mean age of the patients was 61.6±12.2. The ages of 20 patients were between 60 and 79. Results: Unknown (13/30 [43.4%]) was the most commonly identified predisposing factor. The other predisposing gactors were ocular trauma (10/30 [33.3%]); bullous keratopathy (3/30 [10%]); keratoplasty (1/30 [3.3%]); pterygium excision (1/30 [3.3%]); history of Mooren's ulcer (1/30 [3.3%]); and bee sting (1/30 [3.3%]). The visual acuity at the time of evisceration was LP(-) (14/30 [46.7%]); LP(+)(4/30 [13.3%]); and hand motion (12/30 [40%]). Organisms were cultured in 7 patient (23.3%). Among these patients, funguses were cultured in 4 patients, and bacteria were cultured in 3 patients. The most common causes of evisceration were perforation (13/30 [43.3%]); pain (7/30 [23.3%]); impending perforation (7/30 [23.3%]); phthisis bulbi (1/30 [3.3%]); and endophthalmitis (1/30 [3.3%]). Conclusions: According to this study, old age, ocular surface and other ocular disease and the corneal ulcer caused by fungi are the risk factor that can lead to a condition that requires removal of the eyeball. Consequently, we should pay special attention to patients who have these risk factors.`
조상현,최민규 한국게임학회 2001 한국게임학회 논문지 Vol.1 No.1
본 논문에서는 게임의 긍정적인 효과와 부정적인 효과에 대하여 알아보고, 최근 게임의 묘미와 교육적 효과를 동시에 강조하는 에듀테인먼트 인터넷 게임의 경향에 대하여 살펴본다. 그런데 기존의 교육용 게임들은 그 흥미도가 낮아 잘 사용하지 않으려는 경향이 있는 반면 시뮬레이션 게임이나 롤플레잉게임 등 흥미위주의 게임은 그 중독성이 매우 강하므로, 컴퓨터 에서 게임사용을 제한하고 유익한 목적의 컴퓨터사용을 활성화 할 필요가 있다. 따라서, 교육용 컨텐츠를 활성화하고 게임중독을 치료하기 위한 동적 컴퓨터 사용시간 제어시스템 (dynamic computer using-time control system)의 모델을 제시한다. 본 논문에서 제시하는 방법은 기존의 정량적인 컴퓨터 사용시간 제한 프로그램과는 달리 사용자의 교육용 프로그램이나 교육용 컨텐츠의 사용에 비례해서 컴퓨터 사용시간을 증가시키는 동적 제어시스템으로 사용자가 자발적으로 교육용 프로그램이나 교육용 컨텐츠를 이용하도록 유도한다. In this paper, we refer to positive effect and negative effect of game. And we inquire the recent trend of edutainment that emphasizes charm of game and educational effect at the same time. Because the simulation game and the role-playing game have strong toxication, the limitation of computer use is essential. Therefore, we present dynamic computer using-time control system for prevention of game toxicaton and for activity of educational contents. The method considered in this paper increases computer using-time n proportion to using of educational contents. So it lead user of computer to use educational contents voluntarily.
조상현,홍진경,조백기,박영민 대한피부과학회 1999 大韓皮膚科學會誌 Vol.37 No.7
Clinically, Spitz nevi usually appear as asymptomatic, dome-shaped, round to oval, firm nodules with a wide spectrum of colors ranging from translucent to purple, brown or black. The degree of pigmentation varies with the age of the patient and more darkly pigmented lesions are rare in children. Herein, we report an unusual case of pigmented Spitz nevus in a 7-year-old boy, which clinically resembles malignant melanoma.
유리 전외측 대퇴부 피판과 유리 요측 전박 피판을 이용한 설재건 시 공여부 및 기능적 결과 비교
조상현,이원재,유대현,탁관철 대한성형외과학회 2007 Archives of Plastic Surgery Vol.34 No.3
Purpose: The purpose of this study is to evaluate the functional outcome and donor site morbidity of anterolateral thigh free flap(ALT) compared to Radial forearm free flap(RFFF) for the reconstruction of partial glossectomy defect.Methods: 5 ALT free flap (group I) were attempted for partial glossectomy patients. We compared patients undergone ALT flap with those(n=11) of similar size defect reconstructed with RFFF (Group II). Rating scales for articulation and swallowing function were applied and donor site morbidity have been evaluated.Results: The scales for speech function showed no difference between the two groups (average score; group I-6.4, group II-6.45). Swallowing function also showed no difference between the two groups(average score; Group I-6.6, Group II-6.27). ALT group had one patient with donor site morbidity(numbness). All of the RFFF patients(11/11) complained and suffered from hypertrophic scar, retraction, numbness or hyperpigmentation on forearm donor site. Based on our study, ALT free flap is comparable to that of RFFF in terms of functional assessment in tongue reconstruction.Conclusion: Considering the donor site morbidity, ALT flap is to be valuable to reconstruct partial glossectomy defect.