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Blaschko선을 따라 발생한 선상의 Grover병 1예
안제민 ( Je Min An ),고범준 ( Bum Joon Ko ),조문균 ( Moon Kyun Cho ),황규왕 ( Kyu Uang Whang ) 대한피부과학회 2016 大韓皮膚科學會誌 Vol.54 No.7
Grover disease (also known as transient or persistent acantholytic dermatosis) is a pruritic polymorphic papulovesicular eruption that is histologically characterized by the presence of epidermal acantholysis. It primarily occurs in middle-aged individuals and manifests as scattered erythematous or brown papules as well as papulovesicles on the sun-exposed skin of the trunk. A 52-year-old man had erythematous papules and patches linearly arranged on the left thigh and leg with mild pruritus. The skin lesions were successfully treated with a topical corticosteroid. However, 2 months later, the lesions recurred. The histological examination of a punch biopsy revealed focal acantholytic clefts with dyskeratotic cells, hyperkeratosis, and the infiltration of perivascular lymphocytes and eosinophils. Taken together with the late onset and lack of family history, we diagnosed this condition as Grover disease distributed along the Blaschko line, a condition presented here for the first time. (Korean J Dermatol 2016;54(7):544∼547)
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김승준 ( Seung Jun Kim ),김정규 ( Jeong Gyu Kim ),고영훈 ( Young Hun Ko ),안제민 ( Je Min Ahn ),김남수 ( Nam Su Kim ),양형식 ( Hyung Sik Yang ) 대한화약발파공학회 2016 화약발파 Vol.34 No.2
발파작업을 위해 필요한 천공작업은 발파의 효과를 좌우하는 중요한 부분으로 인식되고 있다. 발파를 위한 천공작업 시 발생되는 천공오차는 잔류공 및 여굴 발생, 불균질한 파쇄입도 등 발파효율 저하요인들을 발생시킬 수 있다. 정확한 천공을 위해 자동 천공 점보드릴을 도입하였다. 그 결과 공간격, 저항선의 천공오차율0~2.6%로 미미하게 나타났으며 이로 인하여 90%이상의 굴진율, 전체 굴착량 대비 여굴량 4.3%, 50cm 이하파쇄석 비율 89%~95% 등 발파효과가 향상된 것을 확인하였고 이로 인해 발파 Cycle time을 절감할 수 있을것으로 판단된다. Drilling operation for blasting is an important factor to determine blast effect. Drilling errors that arise from performing drilling for blasting purposes can reduce blasting effect causing residual holes, overbreak, and heterogeneous fragmentation, etc. Automatic drilling system was induced for precise drilling. As a result, drilling error caused by spaces between holes and burden was minor at 0~2.6% and accordingly, blasting effect was improved with over 90% drilling rate, the ratio of overbreak amount to total drilling amount at 4.3%, proportion of fragmentation rock under 50cm at 89~95% and so from this analyses, it was estimated to reduce the total cycle times related to blasting process.
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