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폐 선양낭성암에 동반된 중추성 요붕증으로 발현한 뇌하수체 종양 1예
이강완,함종렬,정정화,강미연,이기동,김현진,정순일 대한내분비학회 2003 Endocrinology and metabolism Vol.18 No.3
저자들은 다음, 다뇨의 증상을 호소한 52세 여자환자에서 폐에 원발성으로 발생한 선양낭성암의 전이로 추정되는 뇌하수체 종양에 의한 중추성 요봉증을 경험하였기에 문헌 고찰과 함께 증례 보고하는 바이다. The metastatic tumor occurs in about 6% to 20% of all cases with central diabetes insipidus. Many kinds of cancers such as breast, lung, colon, prostate, leukemia, and lymphoma can metastasize to the pituitary and its stalk. Primary adenoid cystic carcinoma arising in the bronchus is an uncommon disease. It is histologically and ultrastructurally identical to salivary gland adenoid cystic tumor and is regarded as a slowly growing, low graded-malignancy. This is a case report of a 52-year-old woman with diabetes insipidus caused by a pituitary tumor that might have been associated with adenoid cystic carcinoma arising in the bronchus. The patient was diagnosed by water deprivation test, chest CT scan, bronchoscopic biopsy, and brain MRI scan. The water deprivation test showed the patient had central diabetes insipidus, while chest CT scan revealed a lung mass lesion with distal right intermediate bronchial obstruction. The primary malignancy was confirmed by bronchoscopic biopsy. Finally, we confirmed that the patient had a 7mm-sized in the posterior pituitary gland and a thickened stalk by brain MRI scan (J Kor Soc Endocrinol 18:311~317, 2003).
이강완,강용철,Lee, Gang-Wan,Gang, Yong-Cheol 한국전기기술인협회 2001 電力技術人 Vol.224 No.4
산업체 전력계통에서 전력설비의 이용 효율과 전력 공급의 신뢰성을 높이기 위해 여러 대의 변압기들을 병렬로 운전하는 것이 일반적으로 바람직하다. 그러나 병렬운전 대상인 변압기의 전기적 특성이 다른 경우 자기용량 대 부하 분담률이 달라 변압기 과부하 및 무효전력의 과도한 순환조류가 우려되어 병렬운전을 꺼리는 경향이 있다.
이강완,양정욱,최종기,신정훈 대한전기학회 2022 전기학회논문지 Vol.71 No.5
The grounding system is a power system facility that establishes safety in the work place by decreasing the induced voltage by burying ground conductors and electrodes in the ground. The most important variable affecting the type and size of the grounding system is the soil resistivity. In order to obtain resonable and effective soil resistivity, necessary and sufficient field measurements as well as selection of a suitable soil model are essentially required. The grounding system is implemented in various ways, such as the selection of ground conductors and electrodes, as well as the mesh configuration of a ground grid and its burial depth. Economical factors such as material cost and construction cost of the grounding system are also required as variables for optimization. This paper is a case study of designing and reviewing a grounding system that reflects efficiency and economic feasibility using the grounding grid design and analysis software.