http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
권대근,이상한,이근호,장도근 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.1
Obwegeser Ⅱ method and Rigid fixation conserving the condylar position has been performed on 5 patients with severe mandibular prognathism, and we obtained the result after the follow up study follows. 1. Obwegeser Ⅱ method is considered to move the distal segment passively when surgical correction of severe open bite correction and large amount of set back above 15mm is needed. 2. In one case that has more change of condylar position after operation, documented immediate post- operative relapse have been occurred 3. In the others that have adequate control of condylar position, passive set back and firm skeletal fixation, more functional and esthetic improvement and more post-operative stability has been achieved
Magnetic Resonance Imaging: Historical Overview, Technical Developments, and Clinical Applications
Jahng, Geon-Ho,Park, Soonchan,Ryu, Chang-Woo,Cho, Zang-Hee Korean Society of Medical Physics 2020 의학물리 Vol.31 No.3
The authors congratulate the cerebrations for the 30 years of the Korean Society of Medical Physics (http://www.ksmp.or.kr/). The paper is published to recognize the anniversary. Geon-Ho Jahng invited Professor Z. H. Cho to join to submit this manuscript because he has been one of the leaders in the field of magnetic resonance imaging (MRI) during the last 40 years. In this review, we describe the development and clinical histories of MRI internationally and domestically. We also discuss diffusion and perfusion MRI, molecular imaging using MRI and MR spectroscopy (MRS), and the hybrid systems, such as positron emission tomography-MRI (PET-MRI), MR-guided focused ultrasound surgery (MRgFUS), and MRI-guided linear accelerators (MRI-LINACs). In each part, we discuss the historical evolution of the developments, technical developments, and clinical applications.
So Hee Ahn,Won Yeoung Choi,Ji Won Jeong,Geon Woo Park,Su Yeon Kang,Eun Jeong Kim,Su Rim Sin,Eun Seo Jang,Gye Won Lee,Young Ho Cho 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
In this study, To investigate the antioxidant activities of Rhaponticum uniflorum extracts (RUE), we assessed scavenging activities on DPPH, ABTS radicals, and reducing power. The DPPH and ABTS radical scavenging activities (SC50) of RUE were 96.97±1.19 μg/mL and 31.26±0.13 μ g/mL, respectively, and the reducing power significantly increased dose-dependent manner. To study the antioxidant effecters of RUE in H₂O₂ induced human keratinocytes, expression of Nuclear factor erythroid-2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) were determined by Western blot and qRT-PCR. RUE induced the expression of HO-1, a critical target enzyme of Nrf2, in a concentration-dependent manner. The expression of HO- 1 mRNA was also induced in H₂O₂-treated HaCaT cells but no significant difference in the level of HO-1 mRNA was observed. Taken together, these results suggest that RUE may be useful as a potential ingredient for anti-aging products.
고분자 전해질을 이용한 한외여과에서 마그네슘의 제거에 대한 교반시간의 영향
김승건,이호원,강영주 濟州大學校 海洋硏究所 2003 해양과환경연구소 연구논문집 Vol.27 No.-
This paper was to investigate the effect of mixing time on the rejection of magnesium in polyelectrolyte enhanced ultrafiltration with PSS[poly(sodium-4-styrenesulfonate)] and PDDA[poly(diallyldimethylammonium chloride)]. The removal ratio of magnesium, the rejection ratio of polyelectrolyte, and the Permeate flux were stable within 10 min of mixing. PSS is more effective than PDDA in the removal of magnesium. When PSS of 2.000 ㎎/L was used. the removal ratio of magnesium was 78%. The rejection ratios of PSS and PDDA in Mg solution were up to 95.9% and 95.7%. respectively.
박호건,안기명 한국해운물류학회 2002 해운물류:이론과실천 Vol.- No.3
정기선 해상운송과 관련 운임 결정에 있어서 경제 이론적, 경영 과학적 접근방법과 카르텔 형태인 해운동맹 등을 통하여 인위적이고 물리적인 방법 하에 적정운임 결정을 도출하려는 연구가 이루어져 왔으나 현대조선 기술의 발달과 단위당 비용 절감을 통해 규모의 경제를 실현하고져 계속되는 초대형 컨테이너 선박의 건조는 제한된 정기선 시장에 만성적인 선복 공급 과잉이 되어 극심한 경쟁으로 기존 운임시장이 교란되어 원가이하의 운임 수입으로 해운기업들의 통폐합 또는 존폐문제로 귀결되고 있으며, 더욱이 정기선 시장의 불안정과 운임의 극심한 편차는 궁극적으로 안정된 국제 상품 교역에 위해 요소로 작용하고 있는바 이와 관련 정기선 시장의 운임에 영향을 미치는 요인을 실증 분석하여 그 대책과 방안을 제시하여 정기선 시장의 질서 유지와 운임 안정화를 도모하는데 연구목적을 두고져한다. The global liner shipping markets have changed significantly since year 1990 especially in containerized liner freights. The number of liner containers has increased steadily to about 6-12 percent every year and KMI forecasted global container movements in year 2002 as 248 million TEU showing 142% up on 103 million TEU in year 1992. As well, the number of container vessels and its loading capacity have increased drastically for the purpose of contributing to the increase in worldwide demand for liner freights and the existence of economies of vessel size. KMI reported that the global loading capacity of container fleets will be estimated as 5.5 million TEU showing 150% up on 2.2 million TEU in year 1992 and the size of vessel to be ordered by global carriers become bigger and larger to Post/Super panamax model of 6,000-8,000 TEU capacity as fifth to seventh generation type. Ultimately, the trend to more and larger ships has been accompanied by strong growth in available liner capacity. Most of trade routes have been oversupplied with ship slots and reported that the surplus ratio of ship's slots will be around 24.5% in year 2002 and further estimated excess capacity of 30-40% in the Trans- pacific and the Europe trade. Eventually, such excess capacity in liner shipping is a result of increased competition among the carriers, in which appears to have led to a quest for lower freight rates and lower costs. In turn the liner market has been extremely unstabilized by intense and unfair competition each other and the profitability of liner carries become poor and lower and such low profits may be a force driving toward strategies involving alliances, mergers and building bigger ships in an effort to capture economics of scale and scope. To make it worse, some of carriers having financial difficulties have finally gone to the bankruptcy. Accordingly, the primary objective of this thesis is to explain the determinant of the freight rates theoretically and practically and to find out how to take an appropriate measures to be stabilized for liner markets and liner freight rates through the introduction of institutional and systematical approaches to the liner shipping industry.
지수분포를 따르는 가속수명자료의 적률추정법에 기초한 경험적 베이즈 예측분석
조건호,이우동,하일도 慶山大學校 基礎科學硏究所 1997 基礎科學 Vol.1 No.2
본 논문은 지수수명분포에서 제2종 중도절단된 가속수명자료를 이용하여 고장률의 사전분포의 평균을 알 때, 정상조건하에서 하나의 미래 관찰치의 예측문제를 사전분포의 모수에 대하여 적률추정량에 기초한 불편추정량(unbaised estimator)을 이용하는 경험적 베이즈 접근방법을 적용시켜 경험적 베이즈 예측분포와 예측구간에 대하여 연구하였다. In accelerated life tests(ALTs), the failure time of a test item is observed under high stress conditions, and based on these data, one intrests statistical inference on the parameters of lifetime distribution at the normal stress. Under the type-II censoring, we assume that the life distribution is exponential distribution. When the information on the prior is partially known, we device the empirical Bayesian analysis of ALTs data in order to obtain the empirical Bayesian predictive density and predictive intervals for a future observation under the normal stress level.