• Journal of the Geological Society of Korea
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• v.54 no.5
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• pp.557-566
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• 2018

Pohang earthquake (Main shock magnitude = 5.4) occurred in Southeastern region of South Korea in November 15, 2017. Groundwater levels of 6 monitoring wells with 5 minutes interval measurements located in that region and stream water levels of 4 stations located along the Hyeongsan-gang stream are used for the analysis of earthquake induced effects. Four groundwater monitoring wells show a short-term decrease of groundwater level after a main shock and one well does an increase and the maximum change is about 42.0 cm. Especially, groundwater levels at two monitoring wells near the epicenter are consistently maintained after a decrease. There is little relationship between earthquake magnitude or a distance to epicenter and changing amount of groundwater level and it may be due to the inhomogeneity of geologic material and unconsolidated sediments distribution. The changes in permeability of fractured zone and groundwater levels occasionally cause changes in stream flow rate, and water level of the Hyeongsan-gang stream in the study area decreases just after the earthquake and increases again up to the normal level and next shows an more gentle decreasing slope. Total increasing flow rates at S1 (upstream site) and S4 (downstream site) stations are about $12,096m^3$ and $116,640m^3$, respectively, during the increasing period.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.8A
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• pp.1153-1159
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• 2000

This paper applies a seasonal ARIMA model to the timely forecasting in a line utilization and its confidence interval on the base of the past data of the lido utilization that QoS of the network is greatly influenced by and proposes the prediction algorithm of threshold violation in line utilization using the seasonal ARIMA model. We can predict the time of threshold violation in line utilization and provide the confidence based on probability. Also, we have evaluated the validity of the proposed model and estimated the value of a proper threshold and a detection probability, it thus appears that we have maximized the performance of this algorithm.

• The Journal of Korean Obstetrics and Gynecology
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• v.25 no.3
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• pp.157-167
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• 2012

Objectives: It is not yet clear wheather myomectomy for uterine myomas raises the pregnancy rate or not. And myomectomy has the risk of side effects and reducing pregnancy rate by causing tubal disorders, pelvic adhesions, endometriosis and so on. Therefore less invasive treatment to patients with uterine myoma who want to be pregnant is necessary. Methods: In this study, the patients who had uterin myoma were treated by oriental medical treatments such as herbal medication, acupuncture and moxibustion therapy. Results: After oriental medical treatments, their menstrual condition was improved and size of their myoma was decreased. And they were pregnant within two to five months. Conclusions: This case report shows that the oriental medical treatment is less invasive for uterine myoma and that is effective for patients with uterine myoma who want to be pregnant.

• Environmental Analysis Health and Toxicology
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• v.17 no.2
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• pp.135-140
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• 2002

Sodium hypochlorite (NaOCl) has been demonstrated to be effective against algae that cause red tides. To secure the environmental safety of this chemical for practical use, toxic effects of NaOCl were evaluated in two important aquaculture fishes, flounder and rockfish. At concentrations above 2.5 and 5 ppm for 1 hr, mortality occurred in flounder and rockfish, respectively. Flounder, however, did not die at 2 ppm up to an 8 hr exposure, nor did lipid peroxide level change at the same concentration in 1 hr. Plasma glucose level significantly increased in 1 hr with more than 2 ppm exposure. The results indicate that NaOCl may not induce persistent severe toxicity in flounder and rockfish at the algicidal concentration, 0.5 ppm.

• KDI Journal of Economic Policy
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• v.16 no.2
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• pp.111-139
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• 1994

최근 우리 정부는 공기업(公企業)의 민영화(民營化)를 적극 추전하고 있는바, 우리보다 앞서 민영화정책(民營化政策)을 성공적으로 추진한 경험이 있는 영국(英國)의 경우를 살펴봄으로써 앞으로 계속될 민영화(民營化) 정책수행(政策遂行)에 도움이 될 정책적(政策的) 시사점(示唆點)을 얻을 수 있을 것으로 판단된다. 특히 본고에서는 민영화기업(民營化企業)의 최초공모주(最初公募株) 가격결정(價格決定), 민영화기업 주식(株式)의 투자성과(投資成果) 및 민영화가 주식대중화(株式大衆化)에 미친 영향의 분석에 초점을 두고 있다. 민영화 기업의 최초공모주(最初公募株)는 일반기업의 최초공모주에 비해 현저히 저평가되어 발행되고 있음이 조사되었는데, 이는 정보비소유(情報非所有) 투자자(投資者)에게 최소한의 수익률 즉 무위험수익율(無危險收益率)은 보장해 주어야 한다는 Rock(1986)의 winner's curse 모형의 관점에서 설명되고 있다. 민영화기업의 최초공모주는 장기적으로 정(正)의 초과수익율(超過收益率)을 시현하고 있는데 이는 일반기업의 최초공모주의 주가(株價)와는 대조적인 것이다. 영국(英國) 민영화기업의 주식공급(株式供給)은 개별주주수의 증가를 가져와 주식대중화(株式大衆化)에는 상당한 영향을 미친 것으로 분석되었으나 많은 사람들이 단기간내에 주식(株式)을 매각하고 있어 장기보유유도(長期保有誘導)에는 미흡했던 것으로 밝혀졌다. 이러한 분석결과는 앞으로 우리나라의 공기업민영화(公企業民營化) 추진과정에서 주요 쟁점이 될 것으로 예상되는 주가결정(株價決定)에 대한 시사점을 제공할 수 있으며, 또한 일반투자자(一般投資者)의 민영화주식에 대한 투자전략을 수립하는데 도움을 줄 수 있을 것이다.

• Archives of Reconstructive Microsurgery
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• v.21 no.1
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• pp.34-40
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• 2012

Prevention of acute rejection in composite tissue allotransplantation without continuous immunosuppression lacks reports in worldwide literature. Recently dendritic cells (DC) gained considerble attention as antigen presenting cells that are also capable of immunologic tolerance induction. This study assesses the effect of alloantigen-pulsed dendritic cells in induction of survival in a rat hindlimb allograft. We performed hindlimb allotransplantation between donor Sprague-Dawley and recipient Fischer344 rats. Recipient derived dendritic cells were harvested from rat whole blood and cultured with anti-inflammatory cytokine IL-10. Then donor-specific alloantigen pulsed dendritic cells were reinjected into subcutaneous tissue before limb transplantation. Groups: I) untreated (n=6), II) DC injected (n=6), III) Immunosuppressant (FK-506, 2 mg/Kg) injected (n=6), IV) DC and immunouppressant injected (n=6). Graft appearance challenges were assessed postoperatively. Observation of graft appearance, H-E staning, immunohistochemical (IHC) study, and confocal immunofluoreiscece were performed postoperatively. Donor antigen pulsed host dendritic cell combined with short-term immunosuppression showed minimal mononuclear cell infiltration, regulator T cell presence, and could prolong limb allograft survival.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.188-192
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• 2009

2002년의 태풍 루사와 2003년의 태풍 매미 이후 수공구조물의 설계기준에 대한 관심이 커지고 있는 가운데, 댐 설계기준인 가능최대강수량 및 가능최대홍수량 산정의 일관성에 대한 문제가 제기된 바 있다. 그러나 이러한 문제들은 우리나라의 전반적인 기후, 강수형태, 지형 등을 종합적으로 고려하고, 장기간에 걸쳐 진행되어야 할 연구로 단기간 내의 분석을 통한 해결책 제시는 어렵다고 할 수 있다. 본 연구에서는 가능최대강수량의 공간분포 시 등우선 배치에 따른 가능최대강수량의 면적별 감소율을 분석하여 제시하고자 한다. 이를 위해 우리나라의 대표 유역인 한강 유역, 낙동강 유역, 금강 유역의 수자원단위유역을 기준으로 유역면적과 배치된 등우선 면적간의 차에 대한 가능최대강수량의 감소율을 분석하였다. 이때 대상유역별 가능최대강수량은 국토해양부에서 제공하는 가능최대강수량도에서 값을 읽었고, 가능최대강수량의 포락방법에 따라 기존 방법 및 Horton 경험식과 spline식을 이용하는 경우로 구분하여 공간분포 방법을 적용하였다. 그 결과 기존에 사용하고 있는 포락방법을 적용하여 가능최대강수량을 산정한 경우에는 한강, 낙동강, 금강 유역의 지속기간별 면적차에 대한 감소율을 회귀식의 형태로 도출할 수 있었으나, Horton 경험식과 spline 방법을 이용하여 포락을 수행한 경우에는 PMP의 감소량 및 감소율은 지속기간, 면적차 또는 면적차비율에 대해 뚜렷한 경향성을 나타내지는 못하는 것으로 분석되었다.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.33 no.2
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• pp.149-153
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• 2011

Purpose: The aim of the present study was to evaluate the clinical outcome of resorbable blasting media surface tapered implant. Methods: 169 Osstem$^{(R)}$ GS III dental implants in 73 patients who received implant treatments at Seoul National University Bundang Hospital, were included in this study. The incidence of biological and prosthetical complications has been carefully analysed for each implant. Results: The short-term implant survival rate was 97.63%, success rate 94.7%. The prevalence of biological complications was 15.38% and the prevalence of prosthetic complications was 13.04%. The mean value of crestal bone loss was $0.28{\pm}0.57$ mm. The relationship between loading periods and marginal bone loss was small and not statistically significant. In mandible, marginal bone loss was larger than in maxilla, no statistically significant. Also, length and diameter of implant had no relationship with marginal bone loss. Conclusion: We suggest that this implant system could achieve successful and stable results.

• Korean Journal of Construction Engineering and Management
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• v.6 no.3 s.25
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• pp.167-177
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• 2005

Value Engineering(VE) Workshop executes many tasks with VE team members from various experts of construction field on the basis of VE Job Plan for a short period of time. However, the VE team members are not useful with using VE information until now because it is not systematic in the accumulation and application of VE information. Especially, these problems constitute the obstacles to communication, reliability and quickness of VE information. It also causes an increase of time and cost at VE Workshop. Therefore, the results of this study suggests the conceptual model of Web-Based Information System for VE(WISE) in order to improve the effectiveness of VE Workshop and solve the problem as is stated above.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.27 no.4
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• pp.344-348
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• 2001

Isoflurane and enflurane are currently used on orthognathic surgery in Korea. Since starting to use enflurane and isoflurane in orthognathic surgery, we have questioned their effect on liver function. Many studies have reported liver function after enflurane and isoflurane anesthesia. Although both enflurane and isoflurane are less hepatotoxic than halothane, some cases of liver dysfunction have been reported after enflurane and isoflurane anesthesia. And, we know that isoflurane is less hepatotoxic than its predecessors, enflurane. But, fulminant liver failure and necrosis were also reported after isoflurane anesthesia. The purpose of this study was to compare immediate liver function in healthy orthognathic surgical patients receiving enflurane or isoflurane anesthesia. To assess the effect of enflurane and isoflurane on liver function, we measured pre-and post-operative serum concentrations of aspartate aminotransferase(AST), and alanine aminotransferase(ALT), alkaline phosphatase(ALP), total bilirubin(Tbil).