영산강 유지유량 확보에 따른 수질개선 효과

김석규,차규석 호남대학교산업기술연구소 2011 산업기술연구논문집 Vol.17 No.2

현재 전국에서 가장 수질이 좋지 못한 영산강을 대상으로 수질개선을 위한 다양한 방법을 검토하고 하천유지용수 확보에 따른 수질개선 효과를 검증하였다. 영산강 하천유지용수 확보를 위해 저수지 증고, 하상여과, 천변저류지 조성, 소규모 댐 건설 등의 방법을 선정하였다. 선정된 방법을 통해 확보된 유지유량에 따른 수질개선 효과를 예측하기 위해 수질모델(QUALKO)을 이용하여 수질의 변화상태를 모의하였다. 그 결과, 하천유지유량 증대가 BOD 3.6mg/L에서 2.5mg/L로 수질개선 효과가 있는 것으로 분석되었다. 주요어: 유지유량, 수질모델, QUALKO A approach based on the water quality model, was presented in this paper, in order to estimate effect of water quality management in Yeongsan River. Effect of water quality study by the increasing instream flow. Method of increasing instream flow was selected construction of washland and small dam, riverbed filtration, reservoir expansion. The results indicated that the instream flow would be effective in water quality improvement. It was suggested that the presented approach could be an useful tool to estimate effect of a water quality management policy. Key words: Instream Flow, Water Quality Model, QUALKO

시멘트 및 고성능AE감수제가 고유동콘크리트의 유동특성에 미치는 효과에 관한 실험적 연구

박선규,반성수,우영제,김규용,김무한 忠南大學校 産業技術硏究所 1998 산업기술연구논문집 Vol.13 No.1

The fluidity of high flowing concrete can be affected by numerous parameters which characterize either the cement or the admixture. The reactivity of a cement as determined by its chemical compositions (especially its C₃A content), its fineness and its content in sulfates and alkalies obviously plays a key role in rheology of high flowing concrete in fresh state. Specific properties of high range water reducing AE agent used to enhance the workability of high flowing concrete also exert important influence. The purpose of this experimental study is to investigate and analyze the effect of cement and high range water reducing AE agent in fluidity, setting, compressive strength of high flowing concrete. As a result, we found that fluidity of high flowing concrete is affected greatly by kind of cement and high range water reducing AE agent, also, there is harmonic character between high belite cement and polycarbonic acid high range water reducing AE agent.

Phase-Shift를 이용한 시분할형 부하병렬 고주파 인버터의 특성해석에 관한 연구

조규판,원재선,김동희,노채균,원규식,심광열 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

A half bridge time sharing type load parallel high frequency resonant inverter to give VVVF function in the inverter used as power source of induction heating at high frequency is presented in this paper. This proposed inverter can reduce distribution of the switching current because of using the current of serial resonant circuit to the input current of the parallel one and this paper also realize the output control of independence irrespective of the switching frequency using Phase-Shift. The analysis of the proposed circuit is generally described by using the normalized parameters. Also, the principle of basic operation and the its characteristics are estimated by the parameters, such as switching frequency, the variation of phase angle(φ) of Phase-Shift. It is certain that the proposed circuit will be used and expanded in the high frequency power supplies like induction heating systems.

능동필터 제어시스템을 위한 검출노이즈 저감방법에 관한 연구

최규하,채영민,황종규 건국대학교 산업기술연구원 1996 건국기술연구논문지 Vol.21 No.-

Active Power Filters(APF) have been developed for several years to solve the harmonics disturbance problems on power system networks. Control scheme of the proposed system is the Voltage Regulated Current Source Power Filter(VR-CSPF) that has a function to control the voltage of inverter output capacitor. Differential term is necessary to calculate voltage drop in VR-CSPF system. Since inverter switching action has occurred inherently in APF both switching or outside white nosis affect seriously at control signal. If control signal with added noise is differentiated, then high frequency noise becomes amplified more and more. Thus high frequency noise reduction method is needed for accurate operation. Hence this paper describes reduction method about amplified differential noise problems and its antinoise performances at VR-CSPF control system are studied by simulation and experiment

Z-80 마이크로프로세서를 이용한 TTL IC TESTER의 설계에 관한 연구

宋永圭,金奎植,洪鳳植 충남대학교 공업교육연구소 1984 論文集 Vol.7 No.2

In this paper, detailed circuit design is given on a TTL integrated-circuit tester that can test a wide variety of 14-pin and 16-pin combinational logic systems. PIO NO.1 on the Microcomputer board is dedicated to performing the interface of key board and 7-segment display. PIO NO.2 is the major component in the chip tester. It is interfaced to the IC under test via the sockets that bring out the PIO signals to the microprocessor control system. PIO NO.2 is programmed for mode 3(control mode) operation on both of its I/O port, but PIO NO.1 is programmed for mode 0 and mode 1 The IC chip under test is automatically checked for correctness by a short program and resultant data is displayed in the 7-segment LEDs.

기업 간 거래관계에서 상호의존성이 공급사슬통합 및 사회적 자본에 미치는 영향

이용규(Lee, Yong-Gyu) 한국경영교육학회 2020 경영교육연구 Vol.35 No.2

[연구목적] 본 연구는 상대적으로 연구가 부족했던 기업 간 거래관계에서 나타날 수 있는 상호의존성과 공급사슬통합 및 사회적 자본 간의 관계를 분석하는 것이다. 따라서 상호의존성이 공급사슬통합에 미치는 영향과 공급사슬통합이 사회적 자본에 미치는 영향을 실증하고 시사점을 제공하고자 하였다. [연구방법] 본 연구는 상호의존성, 공급사슬통합, 사회적 자본에 대한 선행연구들과 논의를 충분히 검토하였으며, 최종적으로 5개의 가설을 도출하였다. 국내 기업들을 대상으로 설문자료를 수집하였으며, 연구항목에 대한 신뢰성과 타당성을 분석하고 이를 충족하는 연구항목을 이용하여 Smart PLS 2.0을 활용하여 가설을 검정하였다. [연구결과] 연구가설의 검정결과 공급자 및 구매자 의존성은 공급자 통합과 구매자 통합에 유의한 정(+)의 영향을 미친다. 공급자 통합은 구조적, 관계적, 인지적 자본에 유의한 정(+)의 영향을 미친다. 구매자 통합은 구조적, 관계적 통합에 유의한 정(+)의 영향을 미친다. 또한 공급사슬통합은 매개변수의 역할을 하는 것으로 검정되었다. [연구의 시사점] 연구결과 거래기업들에 대한 필요성으로서 상호의존성 지각은 여러 거래기업들을 하나로 통합하는 공급사슬통합에 반드시 필요로 하는 요인이며, 나아가 공급사슬통합은 네트워크 자본으로서 사회적 자본의 형성과 구축에 영향을 미치는 것으로 나타나 개별기업들에게 공급사슬통합의 중요성에 대한 이론적, 실무적 시사점을 다시 한 번 제시하는 것이다. [Purpose] This study analyzes the relationship between interdependence, supply chain integration and social capital that can occur in the business relations between companies that have been relatively lacking in research. Therefore, this study attempts to demonstrate the effects of interdependence on supply chain integration and the effect of supply chain integration on social capital and to provide implications. [Methodology] This study thoroughly reviews previous studies and discussions on interdependence, supply chain integration, and social capital. Finally, five hypotheses were drawn. The survey data were collected from domestic companies, and the hypotheses were tested by using Smart PLS, using the research items that complied with the reliability and validity of the research items. [Findings] The hypothesis test shows that supplier and buyer dependencies have a significant positive effect on supplier integration and buyer integration. Supplier integration has a significant positive impact on structural, relational and cognitive capital. Buyer integration has a significant positive effect on structural relational integration. Supply chain integration has also been tested as a parameter. [Implications] As a result of the study, the perception of interdependence as a necessity for trading companies is a necessary factor for supply chain integration integrating several trading companies into one. It suggests to companies once again the theoretical and practical implications of the importance of supply chain integration.

서기원의 『혁명』과 1960년대의 르상티망

류동규(Ryu, Dong-Gyu) 한국어문학회 2018 語文學 Vol.0 No.141

Seo Ki-won’s 『The Revolution』 is a historical novel depicting the Donghak Revolution. As one of the post-war writers, Seo Ki-won released works expressing his post-war consciousness even after the 1960’s. This work was published in the 1960’s which was the period of social revolution that led to the events such as 4·19 Revolution, 5·16 Military Coup, and the Movement against the Korea-Japan Normalization Treaty. This novel reflects the writer’s post-war consciousness as well as the circumstances of the 1960’s. Although this novel follows the process of development of the Donghak Revolution, it does not reproduce the Donghak Revolution historically. The events are not developed according to historical necessity, and particularly the process of its main characters becoming involved in the Donghak Revolution is rather accidental. What this novel describes more importantly is the main characters’ inner status shown in the process of being involved in the revolution. The work depicts ‘rebellion’ that is aroused within the main characters’ inner side. The main character named Heon-ju, a child from yangban family, realizes the fallacy of hierarchical order they all belong to and rebels against it. This rebellion forms a driving force that allows him to be engaged in the revolution. This rebellion, however, fails to lead to solidarity with others and ends up becoming a form of totalitarian violence. In the end of this work, Heon-ju attempts to kill Jeon Bong-jun, and it shows his refusal against totalitarian violence. Behind this rebellion, there is ethical emotion, so-called Ressentiment. Ressentiment involves a grudge or vengeance and expresses chronic lethargy, but it also forms potential power for revolution. Ressentiment found in The Revolution seems to have been formed through historical experiences leading from frustration with the Donghak Revolution up to the 1960’s revolution. In the end of The Revolution, the direction of Ressentiment is changed with ‘to be a scapegoat’ by Heon-ju. The self-extinction through ‘to be a scapegoat’ is to pursue self-affirmation paradoxically. With this process, ‘individuals’ are newly found in the place where the revolution has failed.

퇴계 墨竹題畵詩의 전통성과 意境

손오규(Sohn, O-Gyu) 한국시조학회 2014 시조학논총 Vol.41 No.-

퇴계는 ?도산십이곡?의 작가이다. 이 12수의 연시조는 순수국문학작품으로 산수시가의 백미이다. 그런데 퇴계 시가미학의 체계화를 위해서는 한시연구가 꼭 필요하다. 이런 관점에서 퇴계의 묵죽제화시는 매우 적절한 연구대상이라 할 것이다. 그래서 이 논문은 퇴계 묵죽제화시의 전통성과 意境을 연구하였는데, 주로 신잠 墨竹에 대한 題畵詩를 중심으로 하였다. 왜냐하면 신잠의 묵죽은 한 시대를 대변하니, 조선초 전통적 문인사류 묵죽화의 전형을 보여주기 때문이다. 그런데 그의 진품묵죽화는 전해오지 않는다. 따라서 퇴계 제화시를 통해 그 예술적 경계와 내용미, 그리고 전통성과 의경을 유추해 보았다. 그 결과를 바탕으로 조선초 묵죽화에 나타난, 문인사류의 예술관과 미의식을 탐색하고자 하였다. 그 내용을 요약하면 다음과 같다. 첫째, 녹색인 대나무를 검은색만으로 그렸다는 것은, 미의식의 획기적 전환이요 變格이다. 왜냐하면 모든 색채를 검은색으로만 그려서, 대상의 아름다움과 정서적 감동을 표현한 것은 색채미에 대한 상징적 기법이며 미적성찰에 대한 다양성을 제공하기 때문이다. 둘째, 대나무의 物性을 사람의 人性에 비유한 것은, 문인사대부의 예술적 취향을 반영하고 있으며, 묵죽화의 典型性을 부여하였다. 따라서 묵죽은 寫物에 의존 하면서도 寫物의 차원을 떠난, 寫意의 예술경계를 지향한다. 셋째, 寫意는 구체적 작품에서, 수묵의 농담건습(濃淡乾濕)을 통하여 표현되니, 筆墨은 작가의 예술정신을 표상하는 매개체로 그 개념이 확대되었다. 따라서 詩畵一律의 관점에서 墨竹이 시적 서정성을 형상화 할 수 있었던 것이다. 넷째, 묵죽은 寫生을 전제하는데 주관이 객관적 物象에 이입될 때, 비로소 대나무는 예술형식 속에서 존재적 의미를 가지게 된다. 따라서 主客性情의 融化에 의한 意象이 결정되며, 고려의 丁鴻進이나 조선초 孫舜孝, 신잠도 이런 형식의 전통성을 계승하였다. 다섯째, 퇴계는 詩情으로써 畵意를 적절히 노래하였으니, 그 意象은 苦節虛心과 淸致風流 그리고 학문하는 선비의 삶으로 분류된다. 이것은 당시의 학문적 경향과 사회적 풍조를 배경으로 하였다. 여섯째, 묵죽은 대상을 통한 주체의 내면적 인식과 성찰에 의존하니, 尙意技法이다. 그 배경은 도학이니, 도학정신에 입각한 예술관에 기반을 둔 內面性에 집중한다. 이 점에서 문인사대부의 묵죽을 전문화가의 묵죽과 비교할 때, 예술성과 회화사적 의의에 큰 차이가 있다. 일곱째, 尙意는 以形傳神에 의한 身與竹化의 예술경계를 창조해 낸다. 이는 조선조 문인사대부의 수양의 문학관과 직결되니, 詩畵一律의 관점에서 표준적 전형을 제시하였다. 여덟째, 조선조 문인사대부들의 수양의 가장 특징적인 부분은, ‘학문을 통한 心性의 도야와 실천적 삶’이라고 할 것이니, 형이상학적 미적태도를 견지한다. 따라서 문인사대부의 묵죽은 내면성과 정신성에 초점을 맞추어, 修養樂道와 虛心成竹에 의한 意境을 형상화 하였다. The bamboo painting of Korea in Chinese ink by Sin Jam is a typical painting type of the scholar class from the early Joseon dynasty age. But his authentic article is not handed down. That is why this study inferred his paintings from Toegye"s bamboo painting poetry. Based on this result, this study intended to seek out the aesthetic sense in bamboo paintings during the early Joseon dynasty period. The result can be summarized like followings: First, drawing bamboos only in black is not only an innovative turning point in aesthetic sense but also a new style of the picture. Second, comparing bamboos with human reflected artistic taste of nobleman writer and granted a typicality. Third, the method of using Chinese ink has been expanded as a vehicle to express artistic spirit. Thus, the theory that poetry and paintings are brought about from the identical pattern has become a clue to embody lyricism. Fourth, the image of Toegye"s bamboo painting poetry is rooted in the academic tendency and social trend in the Joseon dynasty period. This background is defined as New Confucianism and is placed emphasis on the author’s mind. Fifth, the scholar class in the Joseon dynasty age put much importance in a training of scientific mind and practical life and embodied metaphysical aesthetic sense from the bamboo painting of Korea in Chinese ink.

다층구조 신경망에서 비선형 시그모이드 함수의 Taylor 시리즈 근사화에 의한 랜덤잡음의 비선형 변환

정동규,정규범 우석대학교 자연과학연구소 1997 自然科學硏究論文集 Vol.1 No.-

It is well known that multi-layer feedforward neural networks have the capability of function approximation and pattern recognition through a series of weighted sums and nonlinear transformations. The capability of the network depends upon the set of weights and the characteristics of nonlinear processing units. For the estimating output perturbation in the implementation of the network, it is important to understand the nonlinear transformation of the Sigmoid function. In this paper we analyze the nonlinear transformation of the weighted sum error fed to the function. An approximation of the nonlinear Sigmoid function with nth Taylor series is introduced for the analysis of the statistical noise model. Based on the analysis, the error of the Sigmoid output to the weighted-sum error has been derived. It is assumed that the error in the weighted sum are due to perturbations of the weights and that inputs to the network are statistically independent. The results obtained are expressed with the expectation and variance of output error. And it is applicable to both digital and analog feedforward neural networks with a large sized network, a network with many neurons per layer exception for output layer. For the verification of the derived results computer simulations have been performed, resulting in good agreement between the numerical results and the results of the Taylor approximation of the Sigmoid on the wide range of the weighted sum error.

자기 성찰적 글쓰기 방안 모색 연구

김춘규(Kim, Chun-Gyu) 한국어문학회 2014 語文學 Vol.0 No.125

A study on the Seeking self-reflective writing plan.(Centering on the writing to self-introduction) This paper, considering actual example, gropes for some way of class model at a college writing class. In order to lead learners from the stage of teacher-leading to that of self-leading in working out task, two way of teaching method are possible. These are self-reflection writing and writing instruction. The following is an confirmed out come through this paper. First, the self-reflexive writing goals and directions of the guidance through status and currently writing skills and their students" interest in, and self-confidence were studied. Furthermore, step-by-step problem-solving process of writing to guide the path was through the writing may inspire motivation. Moreover, to allow students what to do for yourself for specific disorders, were willing to express it. Communities and their appearance with a new perspective of looking back and reflect on a serious look like instrument made out his identity shall be able to establish considered. Second, the self-reflective writing through a specific teaching plan and teaching methods to improve writing skills problem. Self-reflexive writing goals and direction of the remedies set of detailed strategies to guide the activities of each stage, or the right of self-directed learners through dialogue technique that enables the writing stage. This allows to perform the critical reading and writing skills in the process of self -reflective writing might be improved, but also greatly reduces many of the capital of any specific degradation was confirmed. In other words, students can lead the class in a climate that was fully express their thoughts and you can express that instilled confidence. Measures proposed in this paper is the real teacher-learners in useful, and look forward to writing education has expanded deeper you want to finish the article.