중간가공처리가 8090 Al-Li 합금의 파괴인성 및 응력부식균열성에 미치는 영향

맹선재,홍석주 漢陽大學校 工學技術硏究所 1997 工學技術論文集 Vol.6 No.1

Effect of cold working and aging treatment on the fracture toughness and stress corrosion cracking(SCC) sensitivity of 8090 Al-Li alloy has been studied. Fracture toughness was evaluated by Klc test using compact tension(CT) specimen. SCC sensitivity was evaluated by crack growth rate test in 3.5 wt% NaCl solution using single edge notched(SEN) specimen. Cold working prior to the aging treatment has resulted in decreased fracture toughness and increased SCC sensitivity. Peak aging decreased fracture toughness and increased SCC sensitivity compared to the underaged specimen. Aging treatment affected more largely on SCC sensitivity than cold working.

중위도 겨울철에서 구름의 고도와 중첩이 대기가열 및 냉각율에 미치는 영향

김맹기,곽종흠,서명석 공주대학교 기초과학연구소 2000 自然科學硏究 Vol.9 No.-

이 연구에서는 장파 (Chou et al., 1994) 및 단파(Chou, 1992)복사 모델을 이용하여 중위도 겨울철 조건하에서 구름의 고도, 구름의 중첩이 대기 가열 및 냉각율에 미치는 영향을 조사하였다. 모델의 입력자료로 사용한 중위도 평균적인 기온, 비습, 오존의 구조는 McClatchey et al.(1972)로부터 얻었다. Based on the longwave and shortwave radiation model, the effects of cloud height and overlapping on the atmospheric heating and cooling rate was studied in midlatitude winter condition. The vertical profiles of air temperature, specific humidity, and ozones was obtained from McClatchey et al.(1972).

ABSTRACTS ; Posters : CONFORMATIONAL PROPERTIES OF Escherichia soli SecA PROTEIN IN AQUEOUS SOLUTIONS

Maeng Seok Song,Hyoung Man Kim 생화학분자생물학회(구 한국생화학분자생물학회) 1995 추계학술대회집 Vol.- No.-

Effect of DAF configuration on the removal of phosphorus and organic matter by a pilot plant treating combined sewer overflows

Maeng, Min-Soo,Kim, Ho-Soo,Lee, Ki-Seok,Dockko, Seok Elsevier 2017 INTERNATIONAL BIODETERIORATION AND BIODEGRADATION Vol.124 No.-

<P><B>Abstract</B></P> <P>Pollutant removal by dissolved air flotation (DAF) at combined sewer overflows (CSOs) was analyzed with operating parameters such as recycling ratio and COD<SUB>cr</SUB> concentration. The nozzle of the CO-Current DAF system is normally operated co-currently with the flocculated water. In this study, the Counter-Current DAF system was used to remove organic matter concentration and total phosphorus to prevent water pollution of river when CSOs occurred. Counter-Current flow with ejection of saturated water was studied, because the acceleration of the flow increased collisions of microbubbles with floc. The experiments showed higher removal efficiency of DAF with Counter-Current flow compared with other configurations. In addition, the direction of the DAF nozzle and variation of angle of the contact zone were studied in detail for better operation. Efficiencies were analyzed for T-P, COD<SUB>cr</SUB>, and turbidity. The optimized conditions for DAF were a flow rate of 4.3 L/min with the Counter-Current nozzle setting. The optimum angle of contact zone was 60° rather than 45°. The removal of T-P, COD<SUB>cr</SUB>, and turbidity at optimum conditions were shown as 82.5%, 72.9%, and 91.2%, respectively. In particular, phosphorous removal was enhanced by using the Counter-Current nozzle and by the angle of the contact zone. The removal of COD<SUB>cr</SUB>, turbidity, T-P and SS for pilot plant showed as 75%, 82%, 80% and 92% respectively at 25 m/h of the hydraulic loading. The recycle ratio was 25%, which is considered to be an effective technique for treating CSOs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> DAF used co-current nozzle showed 20% higher removal efficiency. </LI> <LI> The conical type contact zone (65%) has better efficiency than funnel type contact zone. </LI> <LI> T-P, COD<SUB>cr</SUB> and turbidity of removal efficiency were 82.5%, 72.9% and 91.2%, respectively. </LI> <LI> When the hydraulic loading rate is 24 m/hr, the removal rate is the highest. </LI> <LI> The diffuser cone shape of 60° showed maximum processing efficiency. </LI> </UL> </P>

HGLM 을 적용한 병원 도산 예측방법의 개발

노맹석(Maeng Seok Noh),장혜정(Hye Jung Chang),이영조(Young Jo Lee) 한국병원경영학회 2001 병원경영학회지 Vol.6 No.2

The hospital bankruptcy rate is increasing, therefore it is very important to predict the bankruptcy using the existing hospital management information. The hospital bankruptcy is often measured in year intervals, called grouped duration data, not by the continuous time elapsed to the bankruptcy. This study introduces a hierarchical generalized linear model(HGLM) for analysis of hospital bankruptcy data. The hazard function for each hospital may be influenced by unobservable latent variables, and these unknown variables are usually termed as random effects or frailties which explain correlations among repeated measures of the same hospital and describe individual heterogeneities of hospitals. Practically, the data of twenty bankrupt and sixty profitable hospitals were collected for five years, and were fitted to HGLM. The results were compared with those of the logit model. While the logit model resulted only in the effects of explanatory variables on the bankruptcy status at specific period, the HGLM showed variables with significant effects over all observed years. It is concluded that the HGLM with a fixed ratio and a period of total asset turnrounds was justified, and could find significant within and between hospital variations.

가상자산에 대한 규제 방안의 검토 - 비트코인 등 블록체인기술 기반의 가상자산을 중심으로 -

맹수석(Maeng Soo-Seok) 한국법학회 2021 법학연구 Vol.82 No.-

비트코인 등 블록체인기술 기반의 가상자산에 대한 투기가 심각한 사회 문제로 대두되고 있음에도 불구하고, 이에 대한 규제 법률이 없어 거래시장의 혼란은 물론 이용자 피해가 확산되고 있다. 특히 가상자산거래소에서 천문학적인 규모의 거래가 24시간 현금으로 이루어지고 있음에도 가상자산거래소에 대한 규제 법률이 존재하지 않는 것은 입법 정책적으로 큰 결함이다. 가상자산거래소는 전자상거래법상 통신판매업자로 등록만 하면 영업할 수 있는데, 거래규모에 따른 엄청난 수수료 이익 등을 얻고 있으면서도 시스템 불안정에 따른 해킹 등으로 인해 다수의 이용자들이 피해를 입고 있는 실정이다. 따라서 무엇보다 가상자산거래업자에 대한 규제를 강화하고, 가상자산 이용자의 투자금 보호와 함께 안정적인 거래환경이 조성될 수 있도록 관련 법률을 손질해야 한다. 이러한 측면에서 2021년 5월 7일 발의된 「가상자산업법안」은 가상자산사업자 가운데 가상자산거래업자에 대해 금융위원회의 인가를 받도록 하고, 불공정거래행위 적발 시 부당이득을 몰수·추징하도록 하는 등 이용자를 보호하는 것을 핵심으로 하고 있다는 점에서 의미가 있다 할 것이다. 특히 가상자산사업자는 신의성실의 원칙에 따라 공정하게 가상자산업을 영위하여야 할 뿐만 아니라, 가상자산사업자에게 이해상충의 관리의무와 설명의무를 지우고 있다. 그리고 가상자산 예치금을 고유재산과 구분하여 별도 예치하거나 가상자산 이용자를 위한 보험계약 또는 피해보상계약을 맺도록 하는 등의 의무를 지우고 있는데, 이러한 내용은 매우 중요하고도 필요한 내용이라 할 것이다. 다만, 향후 이용자보호를 위해 가상자산사업자의 손해배상 책임의 강화, 보험계약 금액의 실질화, 적합성원칙의 적용 및 설명의무의 강화, 이용자피해기금제도의 신설 등이 필요하다고 본다. Although speculation in virtual assets based on blockchain technology including BitCoin, etc. appears recently as a serious social issue, there is no regulatory law concerned and damages to investors are expanded as well as confusion in the trading market. Especially, transactions are made in cash in huge scales in virtual asset exchange for 24 hours but it is a large defect in legislation policy that there is no regulatory law for virtual asset exchange. Virtual asset exchange may run its business when it is registered as a telemarketing dealer and many investors are damaged due to system instability and backing, etc. although the commission profit is very large because of the scale of transactions. Therefore, first of all, regulation of virtual asset businesspersons should be strengthened and related laws should be adjusted for formation of stable trading environment as well as protection of investments of virtual asset users. In such aspect, “Virtual Asset Business Act” proposed on May 7, 2021 is meaningful in the respect that investors will be protected by the method that virtual asset dealers among virtual asset businesspersons are certified by Financial Services Commission and unfair profits may be confiscated/collected if unfair transactions are found. Especially, it would be very important and necessary that virtual asset business should be fairly run in good faith, virtual asset businesspersons should bear the liability for control of conflict of interests, and virtual asset businesspersons should bear the liability to deposit virtual asset savings separately from unique properties and to make insurance contracts or damage indemnification contracts as well as liability of virtual asset businesspersons for explanation. Where, it will be required for protection of investigators in future to strengthen the responsibility of virtual asset businesspersons for indemnification of damages, to make the amount of insurance contracts practical, to apply principle of suitability, and to install an investigator damage fund system.

Statiatical methed for origin and migration of Asian peoples using DAN data of old human bones excavated from Korea and Monglia

Noh Maeng-Seok(盧孟錫) 동북아시아문화학회 2007 동북아시아문화학회 국제학술대회 발표자료집 Vol.- No.-

안드로이드 기반 대학교재 중고거래 시스템 설계

홍석호 ( Seok-ho Hong ),장문규 ( Mun-gyu Jang ),맹주완 ( Ju-wan Maeng ),박석천 ( Seok-cheon Park ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.2

본 최근 등록금과 더불어 지속적으로 증가하고 있는 대학교재의 가격에 대하여 부담감을 줄이고 중고거래에 대한 피해를 방지하는 시스템이 필요성이 대두되었다. 따라서 본 논문에서는 JqueryMobile와 Mysql 및 네이버 API에 대해 조사 및 분석한 자료를 바탕으로 안드로이드 기반 대학교재 중고거래 시스템 설계하였다.

투자성 보험상품에 대한 규제

맹수석(Maeng Soo Seok) 한국보험법학회 2010 보험법연구 Vol.4 No.2

투자성 있는 보험상품이란 보험계약자가 납입한 보험료의 전부 또는 일부를 특별계정에 산입하고, 보험자는 이것을 주로 주식 등의 유가증권에 투자하여 얻은 수익으로써 보험사고가 일어난 경우 보험계약자 등에게 보험금으로 지급하는 형태의 상품을 말한다. 그 대표적인것으로 변액보험을 들 수 있다. 변액보험은 일반적인 보험상품과 달리, 자산운용성과에 따라 보험금이 변동하는 상품이다. 그런데 변액보험은 보험상품으로서의 성질 이외에, 증권과같이 원본손실의 위험이 있는 등 금융상품으로서의 성질도 동시에 가지고 있기 때문에, 변액보험계약자를 보호하기 위한 법적 대책이 필요하다. 이에 2010년 개정된 보험업법은 자본시장법과 마찬가지로 변액보험에 대해 적합성 원칙을 인정하면서, 설명의무를 강화하는 등 보험계약자를 보호하기 위한 규정을 두고 있다. 특히 보험자는 일반보험계약자의 연령, 재산상황, 보험가입의 목적 등에 비추어 그 일반보험계약자에게 적합하지 아니하다고 인정되는 보험계약의 체결을 권유하여서는 아니 된다. 그리고 보험자는일반보험계약자가보험계약을 체결하기 전에 면담 또는 질문을 통하여 보험계약자의 연령, 재산상황, 보험가입의 목적 등을 파악하고 일반보험계약자의 서명 등의 방법으로 확인을 받아 유지ㆍ관리하여야 하며, 확인받은 내용은 일반보험계약자에게 지체 없이 제공하여야 한다. 이러한 입법은 변액보험계약자를 보호하기 위해 바람직하다고 생각한다. 다만, 앞으로 시행령 등에 구체적인 사항을 규정하여야 하는데, 이때 변액보험의 청약자가 보험회사에 제출할계약청약서의 서식속에 청약자에관한 상세한 정보를 획득하기 위한 목적의 질문항목을 포함시키도록 하는 등의 후속 조치가 필요하다고 본다. 그리고 증권업에 대한 행정 및 자율규제의 방법과 같이, 변액보험에 있어서도 적합성원칙 등과 관련하여 생명보험업계를 중심으로 하는 자율적인 규제 노력도 병행되어야 할 것이다. A variable insurance stands for a financial product having possi-bility of investment calculating all or part of the insurance premium that the insurance contractor has paid while the variable insurer pays in a form of insurance benefit to the insurance con- tractor, etc with the profit gained by investing this insurance premium on negotiable securities such as stocks, etc in case accident has occurred. In other words, variable insurance is a product in which the insurance benefit changes depending on the asset management results unlike the r-egular insurance policies. Because such variable insurance has the characteristics of financial product such as having risk of losing the original capital just like the stocks at the same time in addition to the characteristics of an insurance policy, the legal measures for protect-ing variable insurance contractors is necessary. Accordingly, the Insurance Business Act amended in 2010 has pro-visions to protect the insurance contractors such as consolidating the duty of explanation while acknowledging the suitability rules on variable insurance at the same time. Especially, the variable insurer must not recommend the conclusion of insurance contract which is recognized as not suitable for the regular insurance contractor reflect-ing on the age, wealth status and purpose of insurance subscription by the regular insurance contractor. And the variable insurer must identify the age, wealth status and purpose of insurance subscription by the regular insurance contractor through interview or inquiry be-fore the regular insurance contractor signs the insurance contract to maintainㆍmanage by getting confirmation with methods such as sig-nature of the regular insurance contractor while the confirmed details must be provided to the regular insurance contractor without delay. Such legislation is though to be ideal to protect the variable insurer. However, while the specific details must be provided in the enforcement ordinance, etc in the future, it seems that the follow up measures such as having the questions with the purpose of acquiring a detailed information on the application on the contract application form to be submitted to the insurance company by the applicant of variable insurance would be necessary. And just like the administra-tive and self-regulated methods on the securities business, a self-regulated regulation effort based on life insurance business would also have to be performed at the same time in relation to the suit-ability rules in terms of the variable insurance.

변액보험제도의 법적 문제에 관한 연구

맹수석 ( Maeng Soo Seok ) 보험연구원 2003 보험금융연구 Vol.39 No.-

금융환경의 변화에 부응하여 2001년부터 판매되기 시작한 변액보험은 계약자의 자기책임의 원칙이 적용되는 상품이다. 즉, 변액보험은 보험계약자가 납입한 보험료의 전부 또는 일부를 특별계정에 산입하여, 변액보험자가 이것을 주로 주식 등의 유가증권에 투자하여 얻은 수익을 갖고 보험사고가 일어난 경우 보험계약자 등에게 보험금으로 지급하는 형태의 보험을 말한다. 이와 같이 변액보험은 자산운용성과에 따라 보험금이 변동하는 상품이므로, 계약자가 불측의 손해를 볼 위험이 있기 때문에, 변액보험계약자를 보호하기 위한 법적 대책이 필요하다. 그러나 투자위험이 따르는 변액보험 계약관계에서 보험계약자를 보호하기 위한 우리나라의 법률규정은 아직 미흡하다고 생각한다. 따라서 이 논문에서는 오래 전부터 변액보험을 판매해온 외국의 법규와 판례를 비교·분석하여, 우리 법률상 변액보험계약자를 보호하기 위한 방안을 모색하고자 한다. 특히 우리 법제의 문제점으로 첫째로 변액보험자의 설명의무 및 적합성 원칙의 문제, 둘째로 자산운용에 있어서 변액보험자의 주의의무 문제, 셋째로 은행 등이 변액 보험상품을 판매하는 경우의 책임 문제에 대해 차례로 살펴보면서, 이에 대한 개선 방안을 제시하고자 한다. Variable insurance has been offered on the domestic market since 2001 to meet the changing needs of financial environments, and is a financial product to which the principle of self-liability for the policy holder applies. In other words, variable insurance refers to insurance wherein the whole or portion of the premium paid by the policy holder is included in the special account. Underwriters for variable insurance invest the foregoing premium mainly in stocks or marketable securities, and pay out applicable proceeds to the insured out of the revenues derived from the foregoing investment. Since variable insurance is a product wherein the insurance proceeds vary with the outcome of asset operation, the policy holder runs the risk of incurring unforeseen loss, and therefore, some legal countermeasures are required to protect the policy holder of variable insurance. It seems, however, that the laws and regulations designed to protect the variable insurance policy holder in a contractual relationship have not yet been properly established in our country. Given such circumstances, I would like to attempt to compare and analyze the laws, regulations, and judicial precedents of those countries where variable insurances have long been sold, and search for countermeasures which will protect the policy holders of variable insurance in our country. Especially in respect to the problems of our legal system - firstly, the policy holder`s obligation for declaration and principles of suitability, secondly, the liability for due diligence in asset management, and thirdly, the issue of bank liability in the event a bank is involved in asset management - I would like to present various approaches to improving these issues.