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      • KCI등재

        郭再祐 宜寧 倡義의 含意

        최재호(Choi Jae-ho) 국방부 군사편찬연구소 2015 군사 Vol.- No.96

        Kwak Jae-Woo(郭再祐) was the first person to raise Righteous Army during Im-Jin-Wae-Ran(壬辰倭亂), and in this paper I intend to analyze and research into the significance and background of his raising righteous army in Ui-Ryeong(宜寧). Firstly, I have given insight to the historical background and significance of the raising in Ui-Ryeong. as discussed in previous researches, the reasons why the continuous defeats of Cho-Seon in the early stages of Im-Jin-Wae-Ran were due to disorder in military administration and slackened discipline in national defence; however this paper puts emphasis on the necessity of looking into the exterior influential factor of the Japan, the world’s strongest military powerhouse at that time. In addition, I have discussed how his competence as a commander of the Righteous Army was possible to be formed, since Kwak was also a general who has outstanding realistic judgment and a sense of neutrality; and also the solidarity of the Ui-Ryeong troops. Secondly, I argued that Kwak’s raising of the Righteous Army in Ui-Ryeong contains more significance than just being the first, since he was able to raise the Army albeit the deficient conditions, especially centered around his relationship with Seon-Jo(宣祖). Moreover, I have examined the fact that Kwak’s raising gave peace to the unstable public at that time, and served as a catalyst for other raising of righteous armies to occur. Thirdly, I have confirmed that the strategic effects of the raising army in Ui-Ryeong is not just limited to local defence of Kyeong-Sang-Woo-Do(慶尙右道) beyond that it provides a turning point to the Choseon government to protect Ho-Nam(湖南) and the naval forces bases, restrain the exile of Seon-Jo and lead the participation of Myung(明) troops into war. In the thesis I have examined the defense strategies that Kwak adopted to fight against the Japanese troops three major skills, bird-rifle(鳥銃), swordwielding, charging at enemies and defense strategies adopted when positioned in a river. Among recent researches on the history of Im-Jin-Wae-Ran Righteous Army are at standstill. I proudly present this paper, as I wish this paper serves as a catalyst of more academic endeavors on the Im-Jin-Wae-Ran Righteous Army.

      • SCOPUSKCI등재

        브로모벤젠의 Hot Atom Chemistry

        최재호,Choi, Jae-Ho 대한화학회 1966 대한화학회지 Vol.10 No.1

        The organic yields (i.e. fraction of nuclear events resulting in organic compound formation) of the radioative neutron capture reactions of halogens in purified bromobenzene have been determined varying extraction time, at $100^{\circ}C$ for thermal effect, varying irradiation time, varying neutron flux and with additional U. V. irradiation. Among the important results are; (1) The organic yields show no remarkable fluctuations with time following neutron irradiation; (2) The organic yields show no change with thermal energy; (3) The organic yields of degassed samples are same in different length of irradiation time whereas the yields of the samples in open air appear to increase with increasing time of irradiation (4) The organic yields increase remarkably with increased neutron flux; (5) The organic yields show a sharp increase by additional U. V. irradiation after neutron irradiation.

      • SCOPUSKCI등재

        芳香族할라이드의 Hot Atom Chemistry 스캐벤져, 溫度 및 酸素의 效果

        최재호,박용찬,손미자,Choi, Jae-Ho,Park, Yong-Chan,Son, Mi-Ja 대한화학회 1965 대한화학회지 Vol.9 No.2

        The organic yields(i.e., fraction of nuclear events resulting in organic compound formation) of the radioactive neutron capture reactions of the halogens in purified aromatic halides have been determined in the liquid and solid state, in the presence of scavenger, elemental halogen for thermal atoms, and in the presence of oxygen. Among the important results are; (1) organic yields of the halides are due in part to hot processes and in part to thermal processes; (2) temperature (from liquid state to solid state); (3) the organic yield of chlorobenzene is the same in the solid phase as in the liquid phase whereas the yields of the bromo-and iodobenzene are higher in the solid.

      • SCOPUSKCI등재
      • KCI등재후보

        운동에너지탄용 복합재 이탈피의 제조에 관한 연구

        최재호,Choi, Jae-Ho 한국군사과학기술학회 2006 한국군사과학기술학회지 Vol.9 No.3

        In order to substitute current aluminum sabot and to increase the penetration performance of the kinetic energy projectiles, the research and development program for composites sabot has been conducted. For carbon/epoxy composites sabot, unidirectional carbon fiber reinforced epoxy prepreg was chosen and thick sectioned composites preforms with the different fiber angles along the circumferential direction of sabot were prepared by compression molding under the careful processing conditions at $150^{\circ}C$ for 1hour with $70kgf/cm^2$ curing pressure. The composites sabot demonstrated a weight reduction by approximately 30% than that of current aluminum sabot. The muzzle velocity of a kinetic energy projectile with composites sabot was measured to be about 63m/s higher than that with aluminum sabot. These results imply that the penetration performance is expected to be considerably increased when the composite sabot is applied to the kinetic energy projectiles.

      • KCI등재

        아연도금강판의 품질향상을 위한 도금욕 내부 유동제어 연구

        최재호,고민석,김석,이상준,Choi, Jae-Ho,Koh, Min-Seok,Kim, Seok,Lee, Sang-Joon 대한기계학회 2001 大韓機械學會論文集B Vol.25 No.10

        The flow fields inside a molten Zn pot of continuous hot-chip galvanizing process were investigated experimentally. With varying several parameters including the strip speed Vs, flow rate Q of induction heater. scrapper location and baffle configuration, instantaneous velocity fields were measured using a PIV velocity field measurement technique. Inside the strip region, counter-clockwise rotating flow is dominant. The general flow pattern inside the strip region is nearly not influenced by the strip speed Vs, flow rate Q and the scrapper location. In the exit region, the flow separated from the moving strip due to the existence of a stabilizing roll ascends to the free surface, for the cases of no scrapper and scrapper detached form the roll. On the other hand, the ascending flow to the free surface is decreased, as the flow rate Q of induction heater increases. By installing a baffle around the uprising strip, the flow moving up to the stabilizing roll decreases. In addition, B-type baffle is better than A-type baffle in reducing speed of flow around the stabilizing rolls. However, the flow ascended to the free surface is largely influenced by changing the flow rate Q, and the scrapper location, irrespective of the baffle type.

      • KCI등재

        무인항공기용 천음속 사류형 압축기의 공력 설계

        최재호,Choi, Jae-Ho 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.2

        In the present paper, a transonic mixed-flow compressor that has relatively lower frontal area than that of centrifugal compressors is discussed, and aerodynamic design as well as performance prediction are performed. Main design constraints are compressor exit Mach number of 0.3 and flow angle of 30degrees at the design point, and maximum overall compressor diameter of 177mm, that is 7.0inch. The mass flow rate of design point and pressure ratio are 1.05kg/s and 5.2:1, respectively. The aerodynamic design results show that the transonic compressor designed with forward-swept inducer and curved diffuser can have the target performance with efficiency of 75% within the given constraints. And the compressor exit flow characteristics are discussed here.

      • KCI등재

        COBie 기반 하수처리시설 유지관리시스템 구축

        최재호,엄동용,Choi, Jae-Ho,Um, Dong-Yong 대한토목학회 2014 대한토목학회논문집 Vol.34 No.1

        BIM 기술의 하나인 COBie 포맷의 출현으로 설계와 시공단계에서 발생한 정보가 운영단계로 자동 전송이 가능해지면서 BIM을 중심으로 하는 유지관리시스템 개발 프로세스가 건축물을 중심으로 실험되고 있다. 하지만 BIM 시장 확대가 예상되는 현재 시점에서 건축물을 포함한 토목시설과 산업시설에서의 COBie 활용성에 대한 검토가 선행되어야 할 필요가 있다. 본 연구는 "공공하수도시설 운영 관리 업무지침"과 현재 운영중인 하수처리시설을 대상으로 진행하였고 후자는 업무지침의 결과를 검증하고 보충하는데 의의가 있다. 본 연구에서 도출된 결론은 세 가지로 요약된다. (1) 자산 모델링 방법인 COBie는 시운전 정보를 포함하기에는 충분하지 않으며, (2) 하수처리시설 모델링에 필요한 IFC 개발과 패밀리 구축이 반드시 필요하다. 그리고 (3) 현재의 운영관리시스템에 적합하게 설계된 COBie 모델은 산업시설분야의 COBie 포맷 타당성을 높여 줄 것이다. 본 연구 결과는 산업시설에서의 COBie 적용을 위한 기초 자료로 이용될 것으로 기대된다. With the introduction of COBie (Construction Operation Building Exchange) in BIM technology enabling an automatic transfer of design and construction information to operation and management (O&M) phase, the BIM centric O&M management system development process has been tested on the subject of architectural types of building. However, for now, there is a need to investigate the technical feasibility of COBie application to civil structures including industrial facilities. This study takes both "O&M Guideline for Public Wastewater Treatment Plant" and a real wastewater treatment plant into account for the purpose, in which the latter is intended to supplement the result of the first. The findings are three-folds: (1) COBie, as an asset modeling, is not sufficient enough to encompass commissioning data, (2) more relevant IFC development and family library build-up useful to modeling wastewater treatment plant is imperative, and (3) well-planned coordination and organization of COBie data-set in line with O&M practice will enhance the feasibility of the COBie in industrial facilities. The result could be used for a basis study for COBie application, particularly in industrial facilities.

      • KCI등재

        중국 수처리 민관협력사업 사례분석을 통한 시사점 도출: 위험 및 성공 요인 도출

        최재호,이승호,Choi, Jae-Ho,Lee, Seung-Ho 한국건설관리학회 2010 한국건설관리학회 논문집 Vol.11 No.3

        In China, the enhancement of water services has become the most crucial issue confronted with the rapid urbanization and industrialization process. A huge financial gap to meet the demand for water infrastructure and need for adopting advanced operation technology precipitated the rapid growth of PPP over the last 10 years. Diverse schemes of PPP such as TOT, Divestiture, and Management Contract and Lease have been practiced. Local governments and private investors/operator have adjusted their objectives and strategies to avoid potential pitfalls behind BOT projects in China. However, current academic research outcomes do not properly reflect important issues of BOT projects or related case studies in China. This limitation has brought in the lack of assessment of important risks and success factors required for the improvement of the body of risk management. In this regard, this study uses the market analysis method to identify major schemes of PPP water projects and conducts case studies on five PPP projects to identify key risk and success factors in association with each different scheme. It is expected that the risk and success factors identified from the cases will be used as reference to Korean companies which plan to enter the Chinese water market. 중국은 지난 20년간 급속한 도시화와 산업화를 경험하면서 빠른 물수요 증가와 심각한 수질오염문제가 발생하였고 이를 해결하기 위한 효율적 물관리 방식의 도입이 절실하였다. 중앙 정부는 해결 방안 중 하나로 1995년 외국인 투자 활성화를 위해 "BOT(Build-Operate-Transfer) 통지"를 공표하고 청두 제6정수장 BOT 시범사업을 실시하였다. 또한 2002년 정부가 해외투자자/운영자의 관망분야 참여를 허용하면서 해외자본/기술 유입이 더욱 가속화 되었다. 현재 중국에서는 다양한 형태의 BOT 사업을 포함한 각종 민관협력사업(PPP)이 진행되고 있으나 현재까지의 연구 범위는 1개의 시범사업을 포함한 BOT모델 사업에 대한 위험요인 및 성공요인 도출에 제한되었다. 본 연구는 기존의 연구 한계를 극복하여 중국 PPP 프로젝트 데이터를 취합하고 주요 PPP 유형 및 사례분석을 실시하여 위험과 성공요인 및 대처방안을 도출하였다. 본 연구결과 중국 수처리 시장에서 다국적 물 기업은 외부 사업 환경의 변화에 능동적으로 대처하여 다양한 유형의 PPP 사업을 전개하고 있고 그런 유형은 지속가능한 사업모델로 자리매김하고 있다. 본 연구는 여기에서 논의한 다양한 유형별 성공 및 위험 요인들이 국내기업의 향후 중국 수처리 시장 진출에 유익한 정보로 활용되기를 기대한다.

      • KCI등재

        fMRI를 이용한 망간 노출 용접공의 운동수행에 따른 뇌 활성도 평가

        최재호,장봉기,이종화,홍은주,이명주,지동하,Choi, Jae-Ho,Jang, Bong-Ki,Lee, Jong-Wha,Hong, Eun-Ju,Lee, Myeong-Ju,Ji, Dong-Ha 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.2

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        Objectives: The purpose of this study is to analyze the effects of chronic exposure by welders to manganese (Mn) through an analysis of the degree of brain activity in different activities such as cognition and motor activities using the neuroimaging technique of functional magnetic resonance imaging (fMRI). The neurotoxic effect that Mn has on the brain was examined as well as changes in the neuro-network in motor areas, and the usefulness of fMRI was evaluated as a tool to determine changes in brain function from occupational exposure to Mn. Methods: A survey was carried out from July 2010 to October 2010 targeting by means of a questionnaire 160 workers from the shipbuilding and other manufacturing industries. Among them, 14 welders with more than ten years of job-related exposure to Mn were recruited on a voluntary basis as an exposure group, and 13 workers from other manufacturing industries with corresponding gender and age were recruited as a control group. A questionnaire survey, a blood test, and an fMRI test were carried out with the study group as target. Results: Of 27 fMRI targets, blood Mn concentration of the exposure group was significantly higher than that of the control group (p<0.001), and Pallidal Index (PI) of the welder group was also significantly higher than that of the control group (p<0.001). As a result of the survey, the score of the exposure group in self-awareness of abnormal nerve symptoms and abnormal musculoskeletal symptoms was higher than those of the control group, and there was a significant difference between the two groups (p<0.05, respectively). In the correlation between PI and the results of blood tests, the correlation coefficient with blood Mn concentration was 0.893, revealing a significant amount of correlation (p<0.001). As for brain activity area within the control group, the right and the left areas of the superior frontal cortex showed significant activity, and the right area of superior parietal cortex, the left area of occipital cortex and cerebellum showed significant activity. Unlike the control group, the exposure group showed significant activity selectively on the right area of premotor cortex, at the center of supplementary motor area, and on the left side of superior temporal cortex. In the comparison of brain activity areas between the two groups, the exposure group showed a significantly higher activation state than did the control group in such areas as the right and the left superior parietal cortex, superior temporal cortex, and cerebellum including superior frontal cortex and the right area of premotor cortex. However, in nowhere did the control group show a more activated area than did the exposure group. Conclusions: Chronic exposure to Mn increased brain activity during implementation of hand motor tasks. In an identical task, activation increased in the premotor cortex, superior temporal cortex, and supplementary motor area. It was also discovered that brain activity increase in the frontal area and occipital area was more pronounced in the exposure group than in the control group. This result suggests that chronic exposure to Mn in the work environment affects brain activation neuro-networks.

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