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      • ActiveX와 Shockwave 技術을 利用한 電子商去來 System 構築에 關한 硏究

        朴鐘憲, 白点錫 영남대학교 사회과학연구소 2000 社會科學硏究 Vol.20 No.1

        인터넷이라는 시공을 초월하는 가상공간을 통해 전자쇼핑몰을 중심으로 활성화 된 전자상거래는 그 범위가 다양한 금융분야로 급속히 확산되고 있다. 이러한 배경하에 본 연구는 ActiveX와 Shockwave를 이용한 전자 상거래시스템의 프로토타입을 구축하여 그 유용성을 고찰하였다. 연구결과를 요약해보면 ActiveX와 Shockwave라는 신기술을 이용하여 전자쇼핑몰을 구축함에 있어 몇몇 문제점이 나타났지만, 이 기술을 이용하면 훨씬 동적이며 차별화 된 전자쇼핑몰이 구축이 가능하며, 짧은 쇼핑몰구축 기간, 서버의 불필요한 부하의 감소 등의 장점으로 인하여 그 만큼 서버에 투자되어야 할 비용과 개발비용을 줄일 수 있어 기업의 경제적인 측면에도 기여할 것이다.

      • 청양 지역에 분포하는 트라이아스기 후기의 조계리층에서 산출된 규화목 화석

        김종헌,백승덕,이원국 공주대학교 과학교육연구소 2003 과학교육연구 Vol.34 No.-

        충남 청양 지역에 분포하는 트라이아스기 후기의 조계리층에서 규화목 화석이 발견되었다. 규화목 화석의 산출은 남한에 분포하는 하부중생계 지층에서 최초의 기록이다. 분류학적 연구결과, 구과류에 속하는 Xenoxylon sp.와 Dadoxylon sp.의 2속 2종이 식별되었다. 본 논문에서 구과류 화석의 특징과 비교 및 그 의미에 대해서 고찰하였다. Petrified wood fossils are discovered from the Upper Triassic Jogyeri Formation distributed in the Cheongyang area. The occurrence of petrified fossils is the first record in the Lower Mesozoic strata distributed in South Korea. As a result of anatomical study of wood fossils, two specie belonging to two genera of Xenoxylon sp. and Dadoxylon sp. which belong to conifers, are recognized. This paper deals with the characteristics, comparison and significance of conifer wood fossils.

      • 울산연안 定置網에 어획된 漁類의 종조성 및 양적변동

        한경호,김종헌,백승록 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.1

        울산 정자연안 외측에 위치한 정치망에서 1998년 2월, 4월 ,6월 ,8월 10월 및 12월, 총 6회에 걸쳐 어획물을 채집하여, 魚類의 種組成, 量的變動 및 群集構造에 대하여 연구하였다. 채집된 어류는 총 12目 45科 89種, 62,978개체였고, 총 생체량은 6,494㎏이였다. 농어目 어류와 쏨뱅이目 어류가 총 56種으로 전체 出現種數의 62.9%를 차지하여 가장 우점하는 目들로 나타났으며, 科別로는 전갱이科와 참복科 어류가 각각 7種 出現하여 가장 많은 種이 出現하였다. 총 89種의 어류중 個體數는 고등어, 전갱이, 멸치 및 말쥐치의 4種이 全個體數의 89.7%를 차지하여 우점하였다. 生體量은 고등어, 전갱이, 꽁치, 말쥐치, 전어, 꼬치고기, 멸치, 정어리, 임연수어 및 덕대의 順으로 이들 10種이 全生體量의 95.5%를 차지하여 우점하였다. 出現 個體數와 生體量은 고수온기인 여름에 높게 나타났으며, 저수온기인 봄과 겨울에 낮게 나타나 수온과 밀접한 관계가 있었다. 월별 出現種數는 2월과 10월에 비교적 적은 種이 출현하였으며, 4월에 49種, 6월에 50種이 나타나 가장 많은 種이 출현하였고, 8월에 46種, 12월에 44種이 出現하였다. 종다양도지수(H')와 0.693~2.146으로 4월에 가장 높은 값을 보였고, 8월에 가장 낮은 값을 보였으며, 우점도지수는 다양도지수와 반대로 4월에 가장 낮은 값을 8월에 가장 높았다. 주요 魚種의 出現頻度를 보면 고등어, 전갱아. 멸치, 말쥐치, 꽁치, 전어, 망상어 및 정어리가 거의 年中 出現하여 본 해역에서의 주거종이었다. Fishes were collected by set net to determine seasonal species composition and fluctuation in abundance in coastal waters of Ulan. Korea, in February, April, June, August and December, 1998. A total of 62,978 fishes (6,494㎏) were sampled and classified into 12 orders, 45 families and 89 species. The most dominant orders were Perciformes and Scorpaeniformes, which accounted for 62.9% of the total. The most dominant families were Carangidae and Tetraodontidae, each represented seven species. The most dominant species were Scomber japonicus, Trachurus japonicus, Engraulis japonicus and Maurolicus muelleri, which accounted for 89.7% of the total fishes collected. The most dominant in biomass were Scomber japonicus, Trachurus japonicus, Cololabis saira, Thamnaconus modestus, Konosirus punctatus, Sphyraena pingues, Engraulis japonicus, Sardinops melanostictus, Pleurogrammus azonus and Pampus echinogaster. Those species together accounted for 95.5% of the total biomass. The number of individuals and the biomass were much higher in summer than in spring and winter, and closely correlated with water temperature. The number of species showed a peak in August, with 46 species, and the lowest number in February, with 30 species. The diversity index was the highest in April(H'=2.146) and the lowest in August(H'=0.693).

      • P239 : Therapeutic effects of 308 nm excimer laser in the treatment of vitiligo patients: a single center study in Korea

        ( Jong Heon Baek ),( Kwang Cheol Hong ),( Dong Yeup Lee ),( Dong Joo Kim ),( Myoung Shin Kim ),( Un Ha Lee ),( Hyun Su Park ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

        Background: The treatment with 308 nm excimer laser has used widely for vitiligo. However, there were few clinical reports about the therapeutic effects of excimer laser in korean literatures. Objectives: The purpose of this study is to investigate the clinical efficacy of the treatment of vitiligo patients in korea using a 308 nm excimer laser. Methods: The 85 patients were treated using a 308 nm excimer laser, which was performed twice a week, for a total of 20 treatments. We analyzed grade of repigmentation with regarding to various clinical parameters. Results: Thirty-one of the 85 patients (36.5%) achieved more than 50% repigmentation. The response to treatment was related to the age, duration of vitiligo, type of vitiligo and site of lesions (respectively, p=0.049, 0.030, 0.001, 0.001). There were no relationship between response to the treatment and the sex and history of previous treatments (respectively, p=0.636, 0.781). Twenty-nine patients (34.1%) had side effects including erythema, perilesional hyperpigmentation and burn, but there were mild and transient. Conclusion: The use of the 308 nm excimer laser for the treatment of vitiligo patients is effective and safe. However, patient age, duration of vitiligo, type of vitiligo and site of lesions may be the key factors affecting the clinical outcome.

      • SCOPUSKCI등재

        한국인 광선각화증의 Dermoscopy 소견

        백종헌 ( Jong Heon Baek ),김명신 ( Myoung Shin Kim ),이운하 ( Un Ha Lee ),함정희 ( Jeong Hee Hahm ) 대한피부과학회 2014 大韓皮膚科學會誌 Vol.52 No.8

        Background: Dermoscopy is a real-time, noninvasive technique that increases the diagnostic accuracy of clinical evaluation by the dermatologist. Characterization of facial actinic keratosis via dermoscopy is valuable in guiding the dermatologist in the differential diagnosis of facial skin lesions. To our knowledge, dermoscopic evaluation of actinic keratosis has not yet been reported in Korean literature. Objective: The purpose of this study was to investigate the dermoscopic features of facial actinic keratosis in Koreans. Methods: We examined 60 patients with facial actinic keratosis using dermoscopy. We determined the frequency of specific features revealed by dermoscopy across the Korean patient population and compared our results with those of other published studies. Results: A total of 67 facial actinic keratoses were observed in 60 patients. The common features of non-pigmented actinic keratoses revealed by dermoscopy were a red pseudo-network (66%), white-to-yellow surface scales (48.9%), linear wavy vessels (38.3%), and targetoid hair follicles (42.6%). The common features of pigmented actinic keratoses revealed by dermoscopy were slate-grey dots (55%) and globules (30%), annular-granular pattern (35%), a brown-to-gray pseudo-network (40%), and targetoid hair follicles (30%). The frequency of specific features revealed by dermoscopy across the analyzed patient population was not significantly different from that reported in other studies, except for rhomboidal structures (5%), which was lower in Koreans than in other populations (35.8%, p< 0.05). The frequency of dermoscopic features was different according to histopathologic subtypes (hypertrophic, atrophic, bowenoid, acantholytic actinic keratosis). Conclusion: Dermoscopy revealed specific features of facial actinic keratosis that can be utilized to evaluate and diagnose facial skin lesions. (Korean J Dermatol 2014;52(8):525∼534)

      • SCOPUSKCI등재

        영아 원심고리홍반

        백종헌 ( Jong Heon Baek ),홍광철 ( Kwang Cheol Hong ),이동엽 ( Dong Yeup Lee ),김동주 ( Dong Joo Kim ),김명신 ( Myoung Shin Kim ),이운하 ( Un Ha Lee ),박현수 ( Hyun Su Park ) 대한피부과학회 2013 대한피부과학회지 Vol.51 No.10

        Erythema annulare centrifugum is an inflammatory skin disorder of unknown etiology characterized by erythematous urticarial papules that enlarge in a centrifugal pattern to form annular appearance. These lesions are usually asymptomatic. Erythema annulare centrifugum generally tends to be a chronic condition. It develops most frequently in adults between 30 and 50 years of life, and only a few infantile cases have been reported in the English literature. Herein, we present an additional case of infantile erythema annulare centrifugum with a review of the literature. (Korean J Dermatol 2013;51(10):817∼820)

      • KCI등재

        Misdiagnosis of ameloblastoma in a patient with clear cell odontogenic carcinoma: a case report

        Jong-Cheol Park,Seong-Won Kim,Young-Jae Baek,Hyeong-Geun Lee,Mi-Heon Ryu,Dae-Seok Hwang,Uk-Kyu Kim 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.2

        Clear cell odontogenic carcinoma (CCOC), a rare tumor in the head and neck region, displays comparable properties with other tumors clinically and pathologically. In consequence, an incorrect diagnosis may be established. A 51-year-old male patient who was admitted to the Department of Oral and Maxillofacial Surgery at Pusan National University Dental Hospital was initially diagnosed with ameloblastoma via incisional biopsy. However, the excised mass of the patient was observed to manifest histopathological characteristics of ameloblastic carcinoma. The lesion was ultimately diagnosed as clear cell odontogenic carcinoma by the Department of Oral Pathology of Pusan National Dental University. Therefore, segmental mandibulectomy and bilateral neck dissection were performed, followed by reconstruction with fibula free flap and reconstruction plate. Concomitant chemotherapy radiotherapy was not necessary. The patient has been followed up, and no recurrence has occurred 6 months after surgery.

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