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김상욱(Kim Sang Wook),이성민(Lee Sung Min),이강현(Lee Kang Hyun),박기준(Park Ki Joon),박혜상(Park Hae Sang) 대한두경부종양학회 2019 대한두경부 종양학회지 Vol.35 No.2
Hamartomas are non-neoplastic malformations or congenital errors of tissue development. Hamartoma is com-posed by an excessive growth of mature tissue present in wrong proportions and abnormal arrangements. The lesion usually presents as a submucosal mass with ill-defined margins. Hamartoma occurs in all areas of the body, especially in the liver, spleen, kidney and lung. However, hamartoma is very rare in the head and neck. Presenting symptoms of hamartoma are typically vague and nonspecific. Treatment of hamartomas consists of adequate surgical excision. We present a 59 year-old male patient who presented with submental swelling. Malignancy could not be ruled out with preoperative radiologic examination, so surgical excision was planned. The mass was excised with transcervical approach. Histopathologic examination has confirmed the mass as a mucinous gland adenomatoid hamartoma.
경비주 접근법으로 안면부 손상없이 제거한 비전두 유피낭종 1예
이강현(Kang Hyun Lee),이성민(Sung Min Lee),김상욱(Sang Wook Kim),박기준(Ki Joon Park),김동규(Dong-Kyu Kim) 대한두경부종양학회 2020 대한두경부 종양학회지 Vol.36 No.1
The midline nasal dermoid cysts are rare congenital neoplasms, which are diagnosed frequently in childhood. Masses are often noticeable at birth gaining size over time with recurrent infections and usually arise from the nasal cavity or lower 1/3 of the nasal dorsum. CT scan as the primary investigation is helpful to determine accurately the size and extent of the lesion as well as the integrity of adjacent bony structures. MRI scan is recommended to rule out an intracranial extension or sinus tracts. Treatment of choice is the complete surgical excision preserving the cyst wall. Here in, we present an unusual case of nasofrontal dermoid cyst in a 19-year-old boy without radiographic evidence of transcranial extension. In this case, we surgically removed nasofrontal dermoid cyst via transcolumellar approach. We also corrected saddle nose deformity after mass removal. Therefore, in this case, we experienced a successful case in which the nasofrontal dermoid cyst was totally removed without facial scar and deformity.
정종덕(Jong-Duk Chung),권성태(Sung-Tae Kwon),한석윤(Seok-Yoon Han),박기준(Ki-Joon Park),천홍정(Hong-Jung Chun) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
In order to facilitate technical exchange among nations and/or institutes through the establishment of mutual recognition and the reliability guarantee of testing results by testing standards standardization, the interlaboratory comparison tests on brake discs and linings between KRRI and CARS were conducted. So far, two ways of comparison tests were performed for a better understanding of mutual recognition and standardization in railroad brake linings between Korea and China. In this paper, the first and second comparison testing results have been summarized, and the suggestions for the future research work are also presented to encourage extensive research on comparison study of railroad brake discs and linings between KRRI and CARS.Eventually, the final goal of the current research will be the establishment of standardization of railroad testing standards.
임홍철,박기준,이숭재 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.4
콘크리트 내부에 위치한 철근과 공동의 탐사 성능을 파악하기 위해, 상용 비파괴 검사 장비를 이용한 측정과 이론적 모델링을 실시하고, 향상된 신호처리 결과의 예를 제시하였다. 실측에 사용된 장비는 레이더 장비 2종과 전자기법 철근 참사 장비 2종이다. 철근 참사에는 직경 19mm의 철근을, 그리고 공동 탐사에는 두께 50mm의 스티로폼을 콘크리트 시험체 안에 각기 다른 피복 두께로 매립하여 측정하였다. 또한, 철근의 수평 배근 간격 탐사를 위해 두개의 철근을 매립 측정하였다. 실험과 함께 전자기파 모델링 방법을 소개하여, 레이더를 이용한 경우, 철근과 공동이 탐지되는 과정을 이론적으로 보여주었다. 탐사능을 향상시키기 위해, 상용 레이더 장비의 측정 결과를 신호처리 과정을 통해 개선하였다.
자궁평활근 수축기전에 미치는 Bisphenol A의 효과
龍俊煥,朴基濬 동남보건대학 2000 論文集-東南保健大學 Vol.18 No.2
Environmental estrogens(xenoestrogens) are a diverse group of chemicals that mimic estrogenic actions. Bisphenol A(BPA). a monomer of plastics used in many consumer products. has estrogenic activity. The overall objective was to examine the effects of BPA on uterine smooth muscle contraction of the rat. High KCI(40 mM) increased the contraction in longitudinal myometrial strips isolated from pregnant and non-pregnant rats. BPA alone had no effect on the resting muscle. But BPA(10 μM) blocked the effect of high KC1 by about 50% 100 μM BPA abolished the contractions elicited by oxytocin(10 nM). Also, the contractile effect of oxytocin was inhibited by pretreatment with the BPA(10 μ M). However, the effects of BPA did not differ significantly between pregnant and non-pregnant myometrium. These results suggest the BPA has effects on the high K^+- and oxytocin-induced contractions of the rat uterine smooth muscle.