표면 에너지 원리를 이용한 칩실 포장의 초기 점착력 특성 연구

임정혁 한국도로학회 2015 한국도로학회논문집 Vol.17 No.6

PURPOSES : The objective of this study is to evaluate the early adhesive characteristic of asphalt emulsions, including polymer-modified emulsions, for chip seals using the surface energy concept, the bitumen bond strength (BBS) test, and the Vialit test. METHODS : Two general methods, the BBS test and Vialit test, were applied to investigate the bond strength and the aggregate loss, respectively. A new theory, the surface free energy (SFE) theory, was used to evaluate the adhesive characteristic between the emulsion and the aggregate. Based on the theory, the contact angles were measured, and then the surface energy components were calculated. Using those components, the work of adhesion (Wa) was calculated for each emulsion. To ensure reliable results, all the tests were performed under the same conditions, i.e., at 25 ℃ for 240 minutes of curing time. For the materials, three emulsions (CRS-2, CRS-2L, and CRS-2P) and one aggregate type (granite) were employed. RESULTS AND CONCLUSIONS : Under the same conditions, the modified emulsions showed better adhesive characteristics and curing behaviors than the unmodified emulsions. In addition, there was no significant difference between the various modified emulsions. One of the important findings is that the analysis by Wa presents more sensitive results than other methods. The results of the Wa showed that the CRS-2P emulsion has the best adhesive characteristics. Consequently, the use of modified emulsions for chip seals could prevent aggregate loss and allow open traffic earlier.

Brewster Angle Microscopy and Surface - Enhanced Raman Scattering Spectroscopic Studies of Langmuir - Blodgett Films of Nonlinear Optical Polymers

임정혁,전병훈,임준완,강용석,이석현,김재호 ( Jung Hyuk Im,Byung Hoon Jun,Jun Wan Im,Young Seok Kang,Suck Hyun Lee,Jae Ho Kim ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1994 No.1

Dip-Pen Nanolithography of Conducting Polymers

임정혁 한국고분자학회 2004 한국고분자학회 학술대회 연구논문 초록집 Vol.29 No.2

피리딘을 포함하는 고분자의 Langmuir-Blodgett 막 특성 연구

임정혁 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

The monolayer property and complex structure of an pyridine-containing polymer with metal ions were investigated at the air-water interface and in the LB films. An amphiphilic polymer, poly(N-((4-pyridinyl)methyl)maleimide-alt-1-octadecene) (PM-0), was synthesized by the reaction of poly(maleic anhydride-alt-1-octadecene) with 4-(aninomethyl)pyridine. A djmethylsulfoxide/chloroform solution of PM-0 was spread on pure water or aqueous metal ion subphases. The monolayers revealed high stability up to the surface pressure of 50mN/m. The images of Brewster angle microscopy revealed straight lines after monolayer collapse. The molecular structure and orientation in the LB films were investigated by means of FT-lR and atomic force microscopy (AFM).

도로 이용자 안전을 위한 경기도 포트홀 현황 분석 및 향후 관리 방안의 제안

임정혁,서정인,한태우,이범기 한국도로학회 2019 한국도로학회논문집 Vol.21 No.1

PURPOSES: The objectives of this study are to analyze the current status of pothole during a rainy season and to suggest a future pavement maintenance method via pothole analysis. METHODS: Potholes are caused by moisture submerged in pavement. The pore pressure caused by traffic and environmental loads causes failure between the aggregate and asphalt binder. Thus, heavy rain is a primary pothole creator, especially in aged pavement. To prevent accidents on roadways, Gyeonggi-do has initiated a fast pothole repair program. However, the number of potholes increase every year. In this study, the current status of potholes and maintenance methods are analyzed. Based on these results, a future pavement maintenance method is suggested. RESULTS AND CONCLUSIONS : Gyeonggi-do’s pothole situation is worse than Seoul’s. Problems were founded, as follows. The amount of potholes was large, and the number increased annually. Pothole management is done at a basic level, because there is no long-term plan. Potholes occur frequently at the same site because of the poor quality of emergency repair. Finally, there is no systematic and comprehensive pavement management. Thus, pothole prevention measures are ill-prepared. Therefore, to reduce potholes and to manage high quality pavement, it is necessary to make a long-term pavement management plan.

일본의 군사전략 변화에 따른 한국의 대응

임정혁 한국동북아학회 2012 한국동북아논총 Vol.17 No.4

This thesis aims to present a responding strategy of Korea that copes with the future promotion of modernization of Japanese defense policy and military strategy by looking into the promotion of modernization of defense policy and military strategy in Japan, which intends to restore the regional leadership in Northeast Asia by becoming a military power that corresponds to the status of political and economical power with modernization of military strength. Japan, which was the defeated nation in the Second World War, could do its best in economic growth by depending so much on the United States of America for security according to the U.S.A-Japan Security Treaty based on the pacifist constitution. Japan approved the basic bill for national security on the seventh of July, 2012, which made it possible for Japan to exercise the right of collective self-defense without constitutional reform. This thesis analyzed the changing process of defense policy and military technology in Japan, which aims for normal country and military power, and the direction for promoting modernization of Japanese military strength. The defense policy of Japan in the Cold War era designated the Soviet Union as a major threat, reinforced the U.S.A-Japan security system, and placed emphasis on building up the military strength of the Self-Defense Forces. In addition, Japan continued the propagation and promotion that gives an impression of the forces restricted to defending the territory by expressing the national post-war defense policy as "defense" rather than "national defense". Japan Self-Defense Forces broke away from the existing passive defense concept, the exclusively defensive security policy and adopted the local defense concept, which is a more extensive concept, starting from 1978. Japan achieved rapid progress in the field of military technology on the basis of economic strength and technical skills. Therefore, Korea has to take a realistic action against modernization of Japanese military strategy, not to mention of changing security environment in Northeast Asia, in order to protect national interest. To this end, Korea needs to be capable of playing a leading role by enhancing national power as well as proactively responding to regional environment. 본 논문은 정치․경제대국지위에 상응하는 군사대국화로 동북아시아의 역내 주도권을 회복하고자 하는 일본의 방위정책과 군사전략 현대화 추진을 연구함으로써 향후 일본의 방위정책과 군사전략 현대화 추진에 따른 한국의 대응전략을 제시하는데 목적이 있다. 제2차 세계대전의 패전국 일본은 평화헌법을 바탕으로 미․일 안보조약에 따라 안보의 상당한 부분을 미국에 의존함으로써 경제성장에 전력을 경주할 수 있었다. 일본은 2012년 7월 7일 국가안전 보장 기본법안을 승인하여 헌법 개정 없이도 집단적 자위권 행사가 가능하게 되었다. 냉전기 일본의 방위정책은 소련을 주요 위협대상으로 설정하고, 미․일 안보체제를 강화하는 한편, 자위대의 전력을 증강하는데 역점을 두어 왔다. 뿐만 아니라 일본은 전후의 국방정책을 ‘국방’이 아닌 ‘방위’라고 표현 하여 영토를 지키는 일에만 한정된 군대라는 인상을 각인시키는 선전 및 홍보활동을 계속해 왔다. 일본 자위대는 1978년을 기점으로 전수방위라는 기존의 소극적 방어개념에서 벗어나 보다 광범위한 개념인 지역방위 개념을 도입하였으며, 경제력과 기술력을 바탕으로 군사과학기술분야에서도 비약적인 발전을 이룩하였다. 따라서 한국이 국가이익을 수호하기 위해서는 동북아시아의 안보환경변화는 물론 일본의 군사전략 현대화 추진에 대해서는 냉철하게 대응해야 한다. 이를 위해서는 주변환경에 능동적으로 대처함은 물론이고 국력을 배양하여 동북아시아의 세력균형자로서 주도적인 역할을 수행 할 수 있는 능력을 가져야 할 것이다.

"아이사진 뽐내기"

임정혁 새가정사 2009 새가정 Vol.- No.-

칼릭스[4]아렌 自己組立 單分子膜의 크기 選擇的 分子認知 硏究

任正爀 충주대 2004 産業科學論文集 Vol.12 No.-

Self-assembled monolayers (SAMs) of monotiolated calix[4]arene (SH-Cal 4) on Au and Ag substrate were successfully constructed and characterized by Fourier transform-infrared(FR-IR) reflection absorption spectroscopy (RAS), surface-enhanced Raman scattering (SERS) spectroscopy, cyclic voltammetry (CV) and scanning tunneling microscopy (STM). FT-IR RAS spectrum and STM image indicated that SH-Cal 4 molecules have a well organized "stand-up" conformation on the surface. The measured diameter of SH-Cal 4 molecule, 14 Å, was in good accordance with that estimated from CPK model. From SERS and CV studies, it is demonstrated that SH-Cal 4 SAMs has a capability of size selective molecular recognition through the hydrophobic upper rim.

PEG-PLA 이중블륵 공중합체를 이용한 고분자 마이셀 시스템

임정혁,허강무,이용규 한국고분자학회 2007 한국고분자학회 학술대회 연구논문 초록집 Vol.2007 No.4

수익 거래에 대한 수행의무 개념 적용

임정혁 한국회계정보학회 2018 한국회계정보학회 학술대회발표집 Vol.2018 No.1