비틀림전단시험에 의한 모래의 강도특성

남정만(Jung Man Nam),홍원표(Won Pyo Hong),한중근(Jung Geun Han) 한국지반공학회 1997 지반 : 한국지반공학회지 Vol.13 No.4

연구논문 : 서해연안 접경지역 현황 및 남북한 협력관리 방안

남정호 ( Jung Ho Nam ),강대석 ( Dae Seok Kang ) 한국환경정책평가연구원 2004 환경정책연구 Vol.3 No.2

As a result of very limited access due to the military confrontation between South and North Koreas for the last five decades, ecosystems in the transboundary coastal area in the western part of Korean Peninsula have been protected from intensive developments in both Koreas. In the core of the recent two military collisions lies the fishery resources represented as blue crabs as well as the politico-military aspect. Increasing development pressures from both sides as reflected in the South Korea supporting the construction of an industrial complex in Kaesung, North Korea, is the main factor which threatens the sustainable resource base in this region. This research is aimed to develop a cooperative management system for the well-preserved transboundary coastal area between South Korea and North Korea. The Pressure-State-Response (PSR) framework of OECD was used to assess environmental conditions, socioeconomic pressures on the environment of the region, and policy responses of both Koreas to those pressures. Protection of ecosystems, peace settlement, and prosperity of the region and the entire peninsula were proposed as the management goals of the cooperative management system. The designation of the area as a Co-managed Marine Protected Area System (COMPAS) through close cooperation among South Korea, North Korea, and international entities was suggested as a way to achieve those goals. Revision of legal and institutional mechanisms, strengthening knowledge base for optimal COMPAS management, integration of the marine protected area and DMZ (demilitarized zone) ecosystem, enhancing stakeholder participation, building international partnership, and securing financial resources were presented as six management strategies.

숙변성 대장 천공의 임상적 분석

남정광 ( Jung Kwang Nam ),김병석 ( Byung Seok Kim ),김경수 ( Kyung Soo Kim ),문덕진 ( Duk Jin Moon ) 대한소화기학회 2010 대한소화기학회지 Vol.55 No.1

목적: 숙변성 대장 천공은 드물지만 치명적인 질환이다. 이 연구의 목적은 이 질환의 임상적 분석을 통해 진단과 치료에 도움이 되고자 한다. 대상 및 방법: 2000년 1월부터 2009년 2월까지 대장천공으로 수술한 92예를 대상으로 후향 분석을 하였다. 숙변성 천공의 진단은 Maurer의 진단기준에 따랐다. 결과: 8예(8.7%)에서 숙변성 천공으로 진단되었다. 연령분포는 59세에서 85세였다. 모든 환자가 여성이었으며 만성변비의 과거력이 있었다. 수술 전에 숙변성 천공으로 진단된 경우는 2예(25%)였다. 천공은 모두 에스상결장에서 발생하였다. 7예에서 하트만 술식을 하였고 1예에서 일차봉합 및 에스상 결장의 루프식 장루술을 시행하였다. 1예에서 재발이 있었고 2예(25%)에서 패혈증과 다발성장기부전으로 사망하였다. 결론: 만성변비가 있거나 거동제한이 있는 환자가 급성 복증을 보일 때 숙변성 천공을 반드시 고려해야 할 것이다. 수술은 하트만 술식이 추천되며, 높은 사망률을 보이지만 즉각적인 수술로 낮출 수 있을 것으로 생각한다. Background/Aims: A stercoral perforation of the colon (SPC) is a rare, life-threatening disease. The aim of this study was to represent the definition of SPC and help the diagnosis and treatment of this condition. Methods: We reviewed 92 medical records of patients who underwent operation due to colonic perforation from January 2000 to February 2009 retrospectively. Maurer`s diagnostic criteria were used for the diagnosis of SPC. Results: Eight patients (8.7%) were diagnosed as SPC. The age of the patients ranged from 59 to 85 years old. All of the patients were female and had a history of long-standing constipation. Only two patients (25%) were diagnosed as SPC preoperatively. The site of perforation of all patients was sigmoid colon. The methods of operation were Hartmann`s procedure (7 cases), and primary repair with sigmoid loop colostomy (1 case). There were one recurrence and two deaths (25%) due to sepsis and multiple organ failure. Conclusions: SPC should be considered in chronically constipated, and bedridden patients who present with acute abdomen. Hartmann`s procedure is the treatment of choice in most situations. Mortality is high but can be minimized with early definitive surgery. (Korean J Gastroenterol 2010;55:46-51)

잎상추 양액재배에 적합한 배양액 개발

남정령(Nam Jung Young),조영렬(Cho Young Ryul),이용범(Lee Yong Beom) 한국원예학회 1997 한국원예학회 학술발표요지 Vol.15 No.1

2020년 발행 『중학교 역사②』 교과서의 「남북국 시대의 전개」 단원 서술 검토

남정호 ( Nam Jung-ho ) 역사교육학회 2022 역사교육논집 Vol.81 No.-

This paper reviewed the text description of Chapter II of the Development of the Age of the North and South Korea of the Middle School History 2 textbook developed in accordance with the 2015 revised curriculum and currently used in middle schools. First, the differences were confirmed by comparing the 2009 revised curriculum and the 2015 revised curriculum, and problems and improvement directions were presented by comparing the system and quantity of unit composition for each textbook. Then, according to the order of description in the textbook, review the text description of the textbook by dividing it into ① statements that are subject to errors and misunderstandings in historical facts, ② statements that do not reflect academic research results and are controversial in terms of theories, and ③ statements that need improvement. pointed out and suggested improvements. As a result of the review, there were several problems and improvements. The important ones are as follows. First, when comparing the 2009 revised curriculum with the 2015 revised curriculum, it was analyzed that there was no significant difference in the amount of student learning. There was no significant difference in the description system or volume of each textbook. ① As for the narratives that may have errors or misunderstanding of historical facts, first, the international situation in Northeast Asia from the end of the 6th to the 7th century was characterized by the confrontation between the north and south powers of Goguryeo, Baekje, Wa, and Dolgwol, and the east and west powers of Silla and Sui and Tang. It is wrong to describe. Second, it is an error to describe the process of forming an alliance between Silla and the Tang as if Silla took the lead. Third, it is an error to say that the ruling class was divided due to frequent wars of conquest as the cause of Baekje's fall. Fourth, the description of the inhabitants of Balhae as composed of ‘Goguryeo people’ and ‘Malgal people’ is highly likely to be misunderstood in many ways. It should be stated first that Goguryeo is a country made up of several races, and the expression ‘Goguryeo people’ includes various races, so it needs to be corrected. ② As for the narratives that do not reflect the research achievements of Korean ancient history academia or have the potential to be controversial in theory, the first is that the Cheonri Wall, which is said to have been built by Goguryeo in preparation for the invasion of the Tang Dynasty, is controversial. Second, the nationalistic description of the outcome of the war between Goguryeo and Sui-Tang should be revised. Third, it is an error to describe the territory at the time of the unification of the three kingdoms of Silla as a line connecting the Daedong River and Wonsan Bay. At that time, it even occupied the Imjin River basin, and it was only after 735 that it advanced to the Daedong River. Fourth, the statement that Kim Chun-chu was born in Jingol and became the first king does not reflect the research achievements of academia. Fifth, the statement that the role of the opposing party and the painters' meeting in Silla's politics after unification has weakened is different from the research results of academic circles and therefore needs to be revised. ③ As for other descriptions that need improvement, first, Kim Chun-chu's diplomatic negotiation target is often described as Yeon Gaesomun. Second, in the Baekje revival movement, there are cases where the Buyeo style is not described, but it is necessary to describe it because it is a person who has been appointed as king. Third, since Balhae moved the capital several times, the fact should be indicated. Fourth, it is necessary to correct the part that may lead to misunderstandings in the descriptions of 'Dogseosampoomgwa' and the 'Bingonggwa'.

전기자동차 배터리모듈의 열해석 및 실험을 통한 검증

남정현(Jung Hyen Nam),정승훈(Seung Hun Jung) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.4

A Security Analysis of Zhao and Gu's Key Exchange Protocol

남정현(Jung-Hyun Nam),백주련(Ju-Ryon Paik),이영숙(Young-Sook Lee),원동호(Dong-Ho Won) 한국컴퓨터정보학회 2012 韓國컴퓨터情報學會論文誌 Vol.17 No.9

키 교환 프로토콜은 공개 네트워크상에서 안전한 통신 채널을 구축하는데 필수적인 요소이다. 특히, 패스워드 기반 키 교환 프로토콜에서는 패스워드를 이용하여 사용자 인증이 이루어지며 이를 바탕으로 안전하게 키 교환이 이루어지도록 설계되어야 한다. 그러나 패스워드는 인간이 쉽게 기억할 수 있는 반면에 엔트로피가 낮고 따라서 사전공격에 쉽게 노출될 수 있다. 최근, Zhao와 Gu가 서버의 도움을 필요로 하는 새로운 패스워드 기반 키 교환 프로토콜을 제안하였다. Zhao와 Gu가 제안한 프로토콜은 일회성 비밀키의 노출 상황을 고려하는 공격자 모델에서도 안전성이 증명가능하다고 주장하였다. 본 논문에서는 Zhao와 Gu의 프로토콜에 대한 재전송 공격을 통하여 이 프로토콜이 저자들의 주장과 달리 일회성 비밀키의 노출 시에 안전하지 않다는 것을 보일 것이다. 본 연구 결과는 Zhao와 Gu가 제시한 안전성 증명이 성립하지 않음을 의미한다. Key exchange protocols are essential for building a secure communication channel over an insecure open network. In particular, password-based key exchange protocols are designed to work when user authentication is done via the use of passwords. But, passwords are easy for human beings to remember, but are low entropy and thus are subject to dictionary attacks. Recently, Zhao and Gu proposed a new server-aided protocol for password-based key exchange. Zhao and Gu's protocol was claimed to be provably secure in a formal adversarial model which captures the notion of leakage of ephemeral secret keys. In this paper, we mount a replay attack on Zhao and Gu's protocol and thereby show that unlike the claim of provable security, the protocol is not secure against leakage of ephemeral secret keys. Our result implies that Zhao and Gu's proof of security for the protocol is invalid.

열저항 네트워크 기법을 활용한 전기자동차 간접수냉식 배터리팩 냉각성능 연구

남정현(Jung Hyen Nam),정승훈(Seung Hun Jung) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.4

강원대 부속농장에 적합한 벼의 육묘기간

남정학(Jung Hak Nam),홍순관(Soon Kwan Hong),조윤상(Youn Sang Cho),신영범(Young Boum Shin) 강원대학교 농업과학연구소 1993 강원 농업생명환경연구 Vol.5 No.-

Lade의 3차원 파괴규준을 이용한 현무암의 전단강도 산정

남정만(Nam Jung-Man),윤중만(Yun Jung-Mann),송영석(Song Young-Suk) 한국토목섬유학회 2010 한국지반신소재학회 논문집 Vol.9 No.3

본 연구에서는 제주도 현무암에 대한 삼축압축시험을 실시하고 Lade(1977)의 3차원 파괴규준을 적용하여 강도정수를 산정하였다. 그리고 3차원 파괴규준에 의해 산정된 강도정수와 파괴면의 특성을 살펴보고, Mohr-Coulomb의 파괴규준으로 산정한 전단강도정수와 비교검토하였다. 삼축압축시험결과를 토대로 Lade(1977)의 3차원 파괴규준을 이용하여 파괴시의 (I₁³/I₃-27)과 (P<SUB>a</SUB>/I₁) ?관계로부터 매개변수인 ŋ₁ 및 m을 구하였다. 3차원 파괴면을 나타내는 정팔면체 평면에서 조면암질 현무암의 파괴면이 가장 크고 스코리아가 가장 작으며, 단면형상은 조면암질 현무암이 가장 삼각형에 가깝고 스코리아가 가장 원형에 가까운 것으로 나타났다. 정팔면체 평면에서 삼축실험결과와 Lade의 파괴포락선 및 Mohr-Coulomb의 파괴포락선을 비교한 결과 높은 응력하에서는 Lade의 파괴규준이 실험치와 일치하며, 낮은 응력하에서는 Mohr-Coulomb의 파괴규준이 실험치와 일치하는 것으로 나타났다. 그리고 Lade의 3차원 파괴면은 Mohr-Coulomb의 3차원 파괴면보다 크며, 이는 Lade의 파괴규준으로 산정된 전단강도정수가 Mohr-Coulomb의 파괴규준으로 구한 것 보다 더 크게 산정됨을 의미한다. In this study, a series of triaxial tests to Jeju basalt were carried out and then shear strength parameters of rock were estimated by the Lade’s three-dimensional failure criterion. Also, the characteristics of shear strength parameters and failure plane which were estimated by the three-dimensional failure criterion were analyzed and this failure criterion was compared with the Mohr-Coulomb failure criterion. The variables of ŋ₁ and m are derived from the relationship between (I₁³/I₃-27) and (P<SUB>a</SUB>/I₁) during the failure period using the Lade’s three-dimensional failure criterion. The failure plane size of Tracy-basalt has the largest plane and that of Scoria has the smallest plane among other octahedral planes which is the three-dimensional failure plane. Also, the failure plane of Tracy-basalt is formed as a triangle and that of Scoria is formed as a circle among other octahedral planes. As the result of comparison with the triaxial test results and the Lade’s failure envelope and the Mohr-Coulomb failure envelope, the Lade’s failure envelope matched up under higher stress, while the Mohr-Coulomb failure envelope matched up under lower stress. Also, the Lade’s three-dimensional failure plane is larger than the Mohr-Coulomb three-dimensional failure plane. It means that the shear strength parameters estimated by the Lade’s failure criterion is larger than that of the Mohr-Coulomb failure criterion.