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김용준,황동건,오정근,이희성,조윤아,신선경,김기헌 한국폐기물자원순환학회 2017 한국폐기물자원순환학회 학술대회 Vol.2017 No.11
시멘트 산업에서는 폐자원의 재활용과 비용절감 및 생산 효율성을 증가시키기 위하여 고로슬래그, 석탄재, 폐수처리오니, 폐타이어, 폐합성수지 등 다양한 폐기물이 보조연료 및 대체원료로 사용되고 있다. 그러나 이로 인하여 시멘트 제품의 유해성, 주변 환경 영향 등에 대한 논란을 유발하고 있다. 이에 따라 시멘트 제품의 품질의 안전성과 환경 유해성에 대한 사회적 논란을 해소하기 위해서 시멘트 중 육가크롬을 20 mg/kg으로 관리 중이며, 육가크롬을 포함하여 6개 중금속(Cr6+, As, Cu, Cd, Pb, Hg)에 대하여 매월 모니터링 중이다. 모니터링에 분석되는 시멘트는 보통 포틀랜드 시멘트를 대상으로 함에 따라 다른 종류의 시멘트에 대한 중금속 함유량을 파악할 필요성이 있다. 따라서 본 연구에서는 고로슬래그를 이용한 고로슬래그 시멘트에 대한 중금속 함유특성을 파악하고자 하였다. 그 결과 고로슬래그 시멘트의 경우 대부분 고로슬래그와 보통 포틀랜드 시멘트가 50 % : 50 %로 혼합하여 생산되고 있었으며, 고로슬래그가 혼합됨에 따라 중금속 함유량이 낮아지는 것을 파악하였다. 또한, 공사현장에서 초기 강도가 낮은 단점이 있으나 자원 재활용 및 유해물질 안전관리 측면에서 볼 때 고로슬래그 시멘트의 사용은 부가가치 및 환경성이 높다고 평가된다.
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김용준,김민의,이남규 대한비뇨의학회 2004 Investigative and Clinical Urology Vol.45 No.2
Purpose: Recurrent stone formers are usually presented with calculi on the ipsilateral side. It has been postulated that sleep posture may alter renal hemodynamics and urinary flow during sleep and promote stone formation. We investigated the correlation of sleep posture with unilateral stone formation and the influence of body position on renal hemodynamics and urinary flow. Materials and Methods: We prospectively evaluated the sleep posture of 106 patients with unilateral urolithiasis. A questionnaire was used to evaluate sleep posture of the patients. Sixteen normal volunteers were studied. They were evaluated in the supine, left and right lateral decubitus positions with separate diuretic renograms spaced one week apart. Renal scans were obtained using diethylenetriamine-pentaacetic acid(99mTc- DTPA) after the patient was equilibrated in the specific body position for 30 minutes. Results: Of the patients, 66 slept consistently with 1 side in a dependent position, and the side of the stone was identical to the dependent sleep side in 80.2%(p<0.01). Renal perfusion and the T1/2 for clearances in the dependent kidney in the left and right decubitus positions were significantly increased when compared to the same kidney in the supine position(p<0.01). Conclusions: Specific sleeping position has significant effects on renal perfusion and urinary flow as measured by nuclear renal scintigraphy. This finding may help explain the correlation of sleep posture with unilateral urolithiasis. Even though this observation needs further investigation, it should be factored into the evaluation and prevention of unilateral stone disease. (Korean J Urol 2004;45:158-162)
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김용준,이원철,윤영완,양극영 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
The purpose of this study is to propose improvement scheme to construction companies for ISO 14001 application through the research of already certificated construction companies problem. Find problem particulars PDCA cycle after investigates disqualified particulars of first certificate audit course of construction companies. The intent of an ISO 14001 environmental management approach to the environmental concerns of the organization. The expected outcome of this approach is continual improvement in environmental management.
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김용준,정진권.Yong Joon Kim. MD. Jin Kwon Chung. MD 대한안과학회 2014 대한안과학회지 Vol.55 No.3
Purpose: To evaluate the success and complication rates of triple procedure, including pterygium excision, marginal amniotic membrane insertion beneath the conjunctiva, and limbal-conjunctival autograft in pterygium surgery. Methods: We conducted a retrospective study on 45 eyes of 45 patients who underwent pterygium surgery between August 2011 and October 2012. After pterygium excision, amniotic membrane was placed beneath the conjunctiva along the margin of the exposed sclera followed by a limbal conjunctival autograft. Success rates, intraoperative and postoperative complications were evaluated. Results: Forty-three eyes with primary pterygium and 2 eyes with recurrent pterygium were enrolled in the present study. The mean age of the patients was 59.87 ± 14.30 years with a mean follow-up of 12.9 ± 4.6 months. There were no complications during surgery. Early postoperative complications included partial wound dehiscence in 1 eye and a simple conjunctival cyst on the autografted conjunctiva in the another eye. No clinically significant recurrence (G2, G3) was noted during the observational periods. Thirty-nine (86.7%) and 6 (13.3%) eyes were graded as G0 and G1, respectively. Conclusions: Our surgical technique not only has the benefits of the limbal conjunctival autograft acting as a barrier against fibrovascular invasion of the cornea and supplying stem cells to the corneal epithelium but also has antiangiogenic effects of amniotic membrane with minimal use. In addition, this technique is a safe surgical method in primary and recurrent pterygium. J Korean Ophthalmol Soc 2014;55(3):354-360
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