Curve Fittig에 의한 Terzaghi의 압밀계수 산정방법 연구

김찬식,임성훈,Kim, Chan Sik,Eam, Sung Hoon 한국농공학회 2014 한국농공학회논문집 Vol.56 No.1

It has been known that Terzaghi's consolidation theory is not well consistent with the consolidation phenomenon on the soft clay ground, but this theory has still been adopted normally in practice because there is no method for estimating the consolidation settlement and rate easier than Terzaghi's theory. It is impossible to map whole part of consolidation settlement vs time curve to the curve of Terzaghi'z average degree of consolidation. If the primary consolidation and the secondary compression are happened same time, it would be useless of trying to find the end of primary consolidation, but it is needed for using Terzaghi's theory that the end of consolidation is determined to the time of beginning consistency between the final settlement analyzed with curve fitting and the experimented consolidation settlement.

홍삼가수분해추출물의 db/db 마우스에서 신장 손상 예방효과

김찬식 ( Chan-sik Kim ),조규형 ( Kyuhyung Jo ),표미경 ( Mi Kyung Pyo ),김진숙 ( Jin Sook Kim ),김정현 ( Junghyun Kim ) 대한본초학회 2018 大韓本草學會誌 Vol.33 No.4

Objectives : Diabetic nephropathy is one of the most significant chronic complications of diabetes. Advanced glycation end products (AGEs) have been implicated in the development of diabetic nephropathy. GS-E3D is an enzymatic modified red ginseng extract by pectin lyase and has an increased concentration of the ginsenoside Rd compared to an unmodified red ginseng extract. In this study, we evaluated the preventive effects of GS-E3D on renal dysfunction in the type 2 diabetic db/db mice. Methods : GS-E3D (100 or 250 ㎎/㎏ body weight per day) was given to db/db mice through oral gavage for 6 weeks. Body weight and blood glucose levels were examined. At the end of the experiment, albuminuria was measured. The renal tissues were collected for histological examination, and immunohistochemical staining was used to detect renal accumulation of AGEs and podocyte loss Results : In the db/db mice, severe hyperglycemia developed, and albuminuria was significantly increased. Diabetes induced markedly morphological alterations to the renal glomerular cells. AGE accumulations and podocyte loss were detected in renal glomeruli. No difference in blood glucose levels was noted between GS-E3D-treated and vehicletreated diabetic db/db mice. However, GS-E3D treatment significantly reduced albuminuria and AGE accumulations in diabetic mice. Moreover, the loss of podocytes was restored by GS-E3D treatment. Conclusions : GS-E3D might be beneficial for the treatment of diabetic nephropathy. The ability of GS-E3D on to attenuate albuminuria and podocyte dysfunction in the db/db mice may be mediated by the inhibition of AGE accumulation.

조도가 대비감도에 미치는 영향

김찬식(Chan Sik Kim),김하경(Ha Kyoung Kim) 대한안과학회 1987 대한안과학회지 Vol.28 No.4

손바닥 정맥 인식에 대한 기존 연구 분석

김찬식(Chan Sik Kim),박강령(Kang Ryoung Park) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6

철도차량기지 건설 시 LID 기법 적용 및 효과 분석

김찬식(Chan-Sik Kim),허준(Jun Hur),김진관(Jin Kwan Kim),어성욱(Seong-Wook Oa) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11

기상변화에 따른 강우강도의 증가와 도시적 토지이용면적의 증가로 강우 시 비점 오염원의 관리에 어려움을 가중시키고 열섬현상과 도시홍수가 중요한 사회 문제로 대두되고 있다. 이러한 문제점을 개선하기 위해 도시 및 개발지역에 개발 이전의 수문 순환 생태에 최대한 근접하여 개발로 인한 영향을 최소화 하는 저영향개발(LID ;Low Impactment Development)기법이 대두되고 있다. 그러나 현재 개발 사업에 적용할 수 있는 LID 기법 및 적용방안이 미비한 실정이다. 특히 철도차량기지 건설시 비점오염원에 대한 저감방안수립은 장치형 비점오염저감시설 설치외에 별다른 대책이 없는 실정이며 LID기법 적용은 전무한 상태로 보다 적극적인 도입이 필요하다. 따라서 본 연구에서는 LID 기법 중 하나인 투수블럭을 철도 차량기지에 적용하였을 때 우수유출량 및 비점오염 저감효과를 모델을 이용하여 정량화하고자 실무적으로 널리 이용되고 있는 EPA SWMM 5를 이용하여 LID 기법을 적용 및 평가하였다. In recent years, heat island effect and urban floods have become more frequent in urban areas. It is widely known that such phenomena are mostly attributed to an increase in impermeable surface such as buildings and road pavements by urbanization. LID (Low Impact Development) has been a hot issue in watershed management due to increase in impervious areas with rapid urbanization and land use changes. This study illustrates how to design and evaluate the effect of non-point pollutant management using EPASWMM LID module and suggests design parameters for modeling LID facilities. Also, this study illustrates how to design and evaluate a non-point pollutant management detention pond using SWMM. In particular, special attention is given to the orifice design. In addition, a methodology which can be used to design a virtual junction in SWMM has been proposed to quantify water quality improvement triggered by the detention pond installation.

비측 안각의 유구낭충증 1 예

김찬식(Chan Sik Kim),손원오(One Oh Shon),이종래(Jong Rae Lee) 대한안과학회 1985 대한안과학회지 Vol.26 No.4

개인정보화 수준 평가시스템 개발 및 적용에 관한 연구

김찬식(Chan-Sik Kim),윤취영(Chui-Young Yoon),임춘성(Choon-Seong Leem) 한국전자상거래학회 2003 전자상거래학회지 Vol.4 No.1

  The advent of information-oriented society brings enterprise"s competition to more severe, and makes it necessary for the efficient use of enterprise"s resources. Enterprises propelled informatization through with the advanced information technology to improve business efficiency and productivity. In this informatization environment, the bottom line is not how good information systems are, but rather how well they are used. Therefore, personal informatization level is very important to improve business performance and enterprise"s competitiveness in enterprise of informatization environment.<BR>  In this study, we developed a PIES (Personal Informatization Evaluation System) that could evaluate personal informatization and maturity level and applied it to human resources in enterprise of informatization environment to verify its application validity. We had a pilot test before applying the public evaluation to human resources in enterprise and the evaluation materials for the PIES ware composed of questionnaire, written test and utilization test.

잠재적 소송위험이 비감사서비스보수 및 총보수에 미치는 영향

김상헌(Kim, Sang-Hun),김찬식(Kim, Chan-Sik) 한국국제회계학회 2011 국제회계연구 Vol.0 No.40

본 연구는 감사인이 부담하는 잠재적인 소송위험을 감사보수 뿐만 아니라 비감사서비스보수의 증가를 통한 총보수에 의해 반영하고 있는지를 실증적으로 분석하였다. 이는 실무적으로 자유수임으로 인해 감사보수의 지속적인 증가에 한계가 존재할 수 있으므로 감사보수를 보완할 대안으로 지속적으로 증가추세에 있는 비감사서비스를 활용할 수 있기 때문이다. 이를 위해 잠재적인 소송위험의 측정치로는 보험사나 신용평가기관등과 같은 위험평가의 우위를 지닌 외부전문가들의 판단치인 임원배상책임보험료와 신용평가등급을 사용하였다. 본 연구의 분석결과에 의하면 먼저 선행연구와 동일하게 잠재적인 소송위험이 높을수록 감사보수가 증가하는 것으로 나타났으며, 잠재적인 소송위험과 비감사서비스제공여부 사이에도 유의한 관련성이 존재하는 것으로 나타났다. 또한 잠재적인 소송위험의 측정치로 설정된 임원배상책임보험료와 신용평가등급이 비감사서비스보수 및 총보수와 유의한 양(+)의 관계로 나타났다. 이는 집단소송제도의 도입 이후 높아진 감사인이 부담하는 잠재적인 소송위험을 감사보수 뿐만 아니라 비감사서비스보수의 증가를 통한 총보수에 유의하게 반영하고 있음을 의미한다. This study is an empirical research on the effect of potential lawsuit risk of on non-audit service fees and total fees. According to prior studies, judgments of outside experts such as insurance companies or credit ratings agencies who hold a dominant position in risk assessment are being used as measurements of lawsuit risks. And preceding studies showed that there is positive relation between potential lawsuit risks and audit fees. But when audit firms are difficult to reflect potential lawsuit risks through audit fees, it is possible for audit firms to reflect potential lawsuit risks through non-audit service fees as a detour method. Therefore it is the characteristic contribution of this study to positively verify whether the auditor is reflecting potential lawsuit risks through not only the audit fees but also through the increase in non-audit service fees. According to results of this study, we were able to conclude that like results of preceding studies even after controlling the existing decisive factors of audit fees, potential lawsuit risks have a favorable relationship with audit fees. Results also show that there are positive relationship between non-audit service fees(tatal service fees) and the Director’s and Officer’s Liability & Company Reimbursement Insurance Fees and credit assessment grades which were established as measurements of potential lawsuit risk. these mean that audit firms are considering non-audit service fees as a detour method when they are difficult to fully reflect potential lawsuit risks by using audit fees.

초음파검사로 진단된 안와이물증

손원오(One Oh Shon),김찬식(Chan Sik Kim),이종래(Jong Rae Lee) 대한안과학회 1985 대한안과학회지 Vol.26 No.4

개인정보화 평가시스템 개발에 관한 연구

임춘성(Choon-Seong Leem),윤취영(Chui-Young Yoon),김찬식(Chan-Sik Kim) 한국전자거래학회 2002 한국전자거래학회 학술대회 발표집 Vol.2002 No.-