• 한국환경보건학회지
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• 제42권3호
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• pp.224-233
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• 2016

Objectives: The purpose of this study was to evaluate the relationship between residential surroundings, such as a power plant, steel mill and petrochemical facilities, and urinary arsenic concentrations in Chungcheongnam-do Province, Korea. Methods: Stratified by fish consumption and residential district, median and maximum block sampling was applied. A total of 346 spot urine samples were speciated for $As^{5+}$, $As^{3+}$, monomethylarsonic acid(MMA), dimethylarsonic acid (DMA) and arsenobetaine (AsB). Exposure assessment was based on questionnaires including data on sex, age, current tobacco use, fish consumption, type of water consumed, and occupational category. Results: Urinary $As^{5+}+As^{3+}+MMA+DMA$ concentrations of people living in the vicinity of a power plant ($GM=50.39{\mu}g/g$) were 61% higher than those of people living in the inland area according to median block sampling. Urinary $As^{5+}+As^{3+}+MMA+DMA+AsB$ concentrations of people living in the vicinity of industrial complex area were higher than those of people living in the inland area according to block sampling by median and maximum. Conclusion: Urinary arsenic concentrations of people living in vulnerable areas such as around industrial complexes, especially power plants, were higher than those of people living in an inland area.

• 소성∙가공
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• 제21권8호
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• pp.473-478
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• 2012

The yoke, a component of conventional motor-driven power steering system, often contains welding defects from its manufacturing process. To eliminate these defects, the precision cold forging process has been tried. In this study, the double-action complex forging has been used to manufacture a torsion joint yoke. The backward extrusion proved faster than the forward extrusion in forging of the product. The double-action complex forging process utilized an upper die composed of a punch, a punch guide, a disc spring and a coil spring. The forged material pushes up the punch guide, and then the disc spring and the coil spring balances the backward extrusion force. Consequently, the flow of material was essentially in the forward direction, resulting in a successful forging operation. The forging load of Al 6061-T6 was higher than that of the automotive structural hot rolled plate.

• 한국조명전기설비학회지:조명전기설비
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• 제9권2호
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• pp.68-78
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• 1995

지금까지 공동주택에서 전력감시반은 지하실에 설치된 그래픽보드를 이용하여 감시를 수행하고 있으나, 공동주택에서의 인력구조와 시스템특성상 적절한 감시방법이라고 할 수 없다. 따라서 본 논문에서는 컴퓨터를 이용한 인텔리전트 감시시스템을 제안하였다. 제안된 감시반은 직렬통신방식을 이용한 집중감시시스템으로 설비를 디자인된 화면으로 실시간 감시하고 사용이력과 고장진단을 위한 지식베이스를 구현하여 감시반 효율성의 향상과 감시반의 공사비 절감을 유도하였으며, 실시간 O.S는 Trend 940을 이용하였다.

• 한국환경과학회지
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• 제8권4호
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• pp.485-490
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• 1999

We will calculate concentration of air pollutants using ISCST3, FDM and AERMOD of models recommended in U. S. EPA which are able to predict concentration of short term for point source, complex like industrial complex, power plant and burn-up institution. Before executing model, as analyzing computational result of many cases according to selecting of input data, we will increasing predictable ability of model in limit range of model. Especially, we analyzed three cases-case of considering various emission rate according to time scale and not, case considering effect of atmospheric pollution materials removed by physical process. In our study, after comparing and analyzing results of three model, we choose the atmospheric dispersion model reflected well the characteristic of the area. And we will investigate how large the complex pollutant sources such as industrial complex contribute to atmospheric environment and air quality of the surrounding the area as predicting and estimating chosen model.

• 농업과학연구
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• 제39권2호
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• pp.263-270
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• 2012

The vitalization of Agro-industrial complex could be an alternative to enhance farmers off-farm income and overcome FTA's impacts on the import of agricultural products. However, it is evaluated the governmental policy on the Agro-industrial complex has not been successfully done as expected. The Agro-industrial complex started to be composed in 1984 and the 427 Agro-industrial complex have been composed nationwide by 2011. Meanwhile, three Agro-industrial complex where 61 factories are running have been composed and two Agro-industrial complex are being under construction in Seocheongun as of 2011. It is investigated that there are constraints in the government supporting systems for Agro-industrial complex. They are; Aged and poor infrastructure facilities, Weak marketing competition, Scattered supporting agencies, and Poor loan system, etc. In this respect, the policy of supporting system was suggested and recommended to vitalize Agro-industrial complex in the study. They are; Better loan system, Improving aged facilities, Marketing support, Assisting technology, Suppling labor power, and Forming factory-network, etc.

• International journal of advanced smart convergence
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• 제9권4호
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• pp.42-51
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• 2020

In this paper, the authors propose the pseudo complex correlation coefficient (PCCC) of the two complex random variables (RV), because the four real correlation coefficients (RCC) of the corresponding four real RVs cannot be obtained only from the complex correlation coefficient (CCC) of given two complex RV. Such observation is motivated by the general statement; "The complex jointly-Gaussian random M-vector cannot be completely described by the complex covariance matrix, even though the real Gaussian random 2M-vector can be completely descried by the real covariance matrix. Therefore, in order to describe completely the complex jointly-Gaussian random M-vector, we need an additional matrix, namely the complex pseudo-covariance matrix, along with the complex covariance matrix." Then, we apply PCCC to correlated information sources (CIS) for non-orthogonal multiple access (NOMA) in 5G system, and investigate impact of the proposed PCCC on the achievable data rate of the stronger channel user in the conventional successive interference cancellation (SIC) NOMA with CIS. It is shown that for the given same CCC, the achievable data rates with the different PCCC are different, because the corresponding RCC are different. We also show that as the absolute value of the same CCC increases, the impact of the different PCCC becomes more significant.

• 연구논문집
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• 통권26호
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• pp.69-84
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• 1996

Regional INformation Network Center has constructed integrated VAN among the heterogeneous computers and core technical information database for machinery & materials-oriented enterprises in the Changwon & Masan Industrial complex. As the result of RINNet project, regional industrial companies can take advantage of getting core technical information for developing new technology and strengthening competitive power. Accordingly, RINNet(Regional INformation Network for science & technology) makes regional industrial companies possible to collect, acquire and use technical information rapidly and motivates regional society to form the rapid technical interchange system and cooperative system among industrial-educational-institutal complex.

• 심성연구
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• 제25권1호
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• pp.65-101
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• 2010

현대 사회에서 부성 콤플렉스의 여성이 증가하는 이유를 크게 두 가지 관점에서 고려할 수 있다. 우선 사회적 요구가 여성으로 하여금 기존의 여성의 입장에서 벗어나 새로운 역할을 강요하고 있다. 이러한 우리 시대의 사회적 요구는 본성을 억압하도록 하는 부성적 특성의 외압으로 작용한다. 따라서 현대의 여성은 저절로 부성상의 지배 하에 놓이게 되는 부성 콤플렉스의 여성이 된다. 또 다른 관점에서 보면 무의식의 보상성에 의하여 부성 콤플렉스의 여성 유형이 증가하고 있다고 볼 수도 있다. 부성상은 언제나 집단의식과 관련되는 심상이다. 집단의식에 문제가 생기고, 이에 대한 해결을 위하여 소위 부성상의 부름을 받은 여성의 경우도 부성 콤플렉스의 여성이 될 것이다. 부성콤플렉스의 여성이 증가하고 있는 현대의 추세는 그만큼 집단 사회의 문제를 폭로하는 것이고, 그에 대한 해결의 욕구가 절실해진 것으로 이해될 수 있다. 부성상의 영향력은 여성에게 긍정적이든 부정적이든 병리적 현상을 야기할 정도로 치명적이다. 그러나 모든 원형상이 그러하듯 그러한 영향력의 이면에는 궁극적으로 도달하고자 하는 목적의미가 숨어 있다. 이를 고려한다면 치명적으로 작용하는 부성상의 요구를 제대로 이해하고, 성공적으로 실현하는 것은, 부성 콤플렉스의 여성 개인에게서는 부성상의 극복이자 동시에 부성상의 치유이고, 궁극적으로는 집단의식이 가진 문제를 해결하게 되는 것이다. 연구를 위하여 부성상의 영향 하에 있는 여성 인물상을 다루는 두 민담을 선택하였다. <심청전>은 긍정적인 부성 콤플렉스의 여성을 위하여, 그리고 <바리공주>는 부정적 부성 콤플렉스의 여성을 위하여 선택되었다. 연구의 진행은 부성상과 관련된 여성 주인공의 민담의 분석심리학적 해석을 통하여 크게 세 가지 국면으로 살펴보려고 하였다. 그 첫 번째는 민담의 해석을 통하여 부성상의 지배 하에 있는 여성이 겪는 전형적인 문제점을 살펴보는 것이다. 특히 부성이 갖는 긍정적 영향력과 부정적 영향력을 여성의 삶과 연결시켜 구체적으로 다룰 것이다. 두 번째는 민담에서 강력한 부성상의 지배로부터 여성 주인공이 어떻게 벗어나는지를 살펴보게 될 것이다. 이는 부성 콤플렉스의 여성 유형이 여성성을 회복하고 전(全)인격적 실현에 이르는 길을 제시하는 내용이 된다. 마지막으로 부성상의 지배 하에 있게 된 여성은 궁극적으로 집단이 가진 문제를 해결하고 치유하도록 부름을 받았다는 관점을 제시할 것이다. 여성 주인공이 성공적으로 부성상에서 벗어나 오히려 부성상의 문제를 해결한다면 이는 집단의 삶에 새로운 면모를 가져다줄 하나의 전형이 될 것이다. 이것이 두민담을 통하여 다루려는 부성 콤플렉스의 진정한 목적의미가 될 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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• pp.49-51
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• 2001

Recently, according to a rapid increase of the power demand, the KEPCO's 154kV lines are continuously expanded and become to the more complex loop system. As a result of increase of the fault capacity and the unbalance of power load flow, the circuit breaker have been exceeding the capacity limit of those in the loop power system. To solve this problem, APRS application will be necessary more and more.

• 한국대기환경학회지
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• 제13권6호
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• pp.427-437
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• 1997

Complex terrain which is rather typical topographic character in Korea would greatly influence the dispersion of air pollutant. In this study, we investigated how the complex terrain in the vicinity of the coal-fired plant affects the air dispersion modeling results by using several US EPA models: SCREEN, CTSCREEN, ISCLT3, ISCST3, and RTDM. Screening analysis was followed by long-term analysis, and the plume movement over the terrain was precisely tracked for selected cases. Screening analysis revealed that the highest concentration of sulfur dioxide occurs at the downwind distance of 1.3 km under the unstable conditions with weak winds. However, this highest level of $SO_2$ could be raised by 4 times even in the presence of a hill of 170 m at a distance of 2 to 3 km. Seasonal and annual average concentrations predicted with the ISCLT3, ISCST3, and RTDM models showed a rapid incrase of $SO_2$ levels in front of the high mountains which are located more than 15 km away fromt the source. The highest concentrations predicted with ISCST3 were significantly higher than those with ISCLT3 and RTDM mainly because ISCST3 chooses simple-terrain model calculations for receptors between stack height and plume height. Although the highest levels under the stable conditions were usually found in the areas beyond 15 km or more, their absolute values were not so high due to enough dispersion effects between the source and the receptors.