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신정현,박주용,지영민,송인석,방강미,최성원,Shin, Jung-Hyun,Park, Joo-Young,Ji, Young-Min,Song, In-Seok,Pang, Kang-Mi,Choi, Sung-Weon 대한악안면성형재건외과학회 2008 Maxillofacial Plastic Reconstructive Surgery Vol.30 No.6
Running title: A plunging ranula extended into parapharyngeal space Ranulas are lesion of sublingual gland origin, which occur in the floor of the mouth. Most ranulas, whether simple or plunging, are pseudocysts without and epithelial lining and ranulas have higher levels of salivary amylase and protein content. They can be classified into two types based on their extent: simple ranulas, confined to the sublingual space and plunging ranula which extend into adjacent spaces. Plunging ranula requires differential diagnosis with other lesions (neuroma, monomorphic adenoma, hemangioma, lipoma, dermoid cyst, lateral cervical cyst). The patient was diagnosed as plunging ranula. We experienced 17 years old male, visited to our department, who complain Rt. cervical swelling and in MRI view, this lesion involved sublingual, submadibular, parapharyngeal, skull base. We experienced a rare case of plunging ranula, extended into parapharyngeal space. We report the case.
태양광모듈의 전력 측정 개선을 위한 온도 보정법에 대한 연구
신정현(Jeong-Hyun Shin),이영석(Young-Seok Lee),이승재(Seung-Jae Lee),문종필(Jong-Fil Moon) 대한전기학회 2022 전기학회논문지 P Vol.71 No.2
Nowadays, solar energy is major energy source. New amount of solar system installation are estimated as about 200GW globally in 2021. Solar module has each original IV characteristics by the types of products. These informations contain Voc, Isc, Vmp, Imp, Pmax, F.F, Rs, Rsh and etc. These information reveal us voltage, current, power, resistance of PV module. Thus, precise measurement of IV characteristics of PV module is important for quality control, performance evaluation, and safety enhancement. In this paper, temperature compensation method is applied to PV module IV characteristics curve measurement under continuous solar simulator condition. These improved IV measurement method will attribute IV measurements of PV module easily and precisely.
남북한(南北韓) 대화(對話)의 국내외적(國內外的) 환경(環境)
신정현 ( Jung Hyun Shin ) 평화문제연구소 1989 統一問題硏究 Vol.1 No.1
The purpose of this paper is to investigate some environmental factors that facilitate contacts and dialogue between South and North Korea. Since the conclusion of the armistice agreement in 1953, the two Koreas have maintained a highly tension-ridden relationship, which has become a major element causing the instability and insecurity within and without the Korean peninsula. Those factors are divided into three catagories : They are psycological, operational and international ones. First, the psycological category refers to the perceptions and attitudes of Koreans toward each of the two divided parts. Second, the operational category includes socio-political and economic factors of South and North Korea, which have contributed to the sustaining of different ideas, systems and policies in each part. Third, the international category mainly concerns the global and regional situations which have something particular to do with the Korean peninsula. In this category, diplo-strategic interests and the power configuration among the four major powers, the United States, the Soviet Union, China(PRC) and Japan are deeply examined with the assumption that those factors exert important influence on the development of South - North Korean dialogue. Despite the July 4 the cornmorn communique in 1972, which both sides agreed that Korean unification must be attempted peacefully as well as indepentently, one`` s perceptions and attitudes toward the other are still conflicting and even antagonistic. The people of both Koreas considerably share enemy-images toward each other. These psycological and perceptual factors have been formed through the Korean War and subsequent development of confrontation and conflicts along the de-militarized zone between the two Koreas, It is certain that these factors are highly disfunctional to the improvement of South and North Korean relations. Meanwhile, some operational factors, demonstrating certain changes in political structures and processes, are expected to have positive influences on the opening of dialogue between the two Koreas. Most important are the over-all processes of democratization which is under way in South Korea, and the generational changes in ruling circles and the adoption of open -door policy in North Korea. But these changes will gradually take place, and have some influences on the improvement of inter- Korean relations. Lastly, current international environments surrounding the Korean peninsula prove to be favorable to the maintenance of a stable relationship and to the conduct of negotiations between the two Koreas. The growing mood of detente among the four major powers and their respective relations with the two Koreas will be certainly conducive to the creation of a stable peace structure in the Korean peninsula, which may in turn contribute to the regional stability in Northeast Asia. Although psycological and perceptual factors remain unchanged, it is assumed that they are also affected by the change in operational and international environments. To sum up, the inter-Korean relations are surely entering into a new era that may facilitate the peaceful solution of the unification problem through contacts and dialogue between both`` sides, What is most necessary is that both Koreas increace their capabilities to adopt themselves to the changing environments, which keeping self-restrained interactions between themselves.
Symposium 8-5 (SYP 8-5) : Antioxidant and vitamins in the management of vitiligo
신정현 ( Jeong Hyun Shin ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.2
Vitiligo is a multifactorial disorder characterized by the appearance of white maculae that may spread over the entire body skin. Depigmentation is due to the loss of functioning melanocytes. The pathogenesis may involve multiple pathogenetic factors. Impaired antioxidative defences lead to accumulation of reactive oxygen species (ROS), which affect melanocytes. Mitochondrial membrane lipid peroxidation may participate to ROS overproduction. A temporal sequence may connect oxidative stress and autoimmunity. Overall, a genetic predisposition renders vitiligo melanocytes more susceptible to precipitating factors than normal healthy melanocytes. Therefore the most effective therapy should target all the etiologic factors. The current therapies mainly act by inducing immunosuppression and stimulation of melanocyte proliferation and migration. Other therapies, such as antioxidants which aimed to reduce oxidative stress, can be used in association with other therapeutic options.