창업교육경험과 성별이 창업의지에 미치는 조절효과에 관한 연구

김충만 조선대학교 산업기술창업대학원 2021 국내석사

The purpose of this study was to investigate the impact of social capital and positive psychology capital on the will of start-up according to experience and gender of start-up education on young people in local metropolises and middle and small cities, and to verify the research as follows. First, social capital has a positive effect on the will to start a business. Second, positive psychology capital has a positive effect on the will to start a business. Third, through experience in entrepreneurship education, social capital affects the will to start a business more. Fourth, men are more affected by social capital than women. Fifth, positive psychology capital has a positive effect on the will to start a business through experience in start-up education. Sixth, men are more affected by positive psychology capital than women.

반영구화장에 대한 지각된 서비스품질이 자아존중감 및 삶의 만족에 미치는 영향 : 반영구화장에 서비스품질이 자아존중감과 삶의 만족에 미치는 영향

신서현 조선대학교 산업기술창업대학원 2020 국내석사

본 연구에서는 피시술자가 지각하는 반영구화장 서비스품질이 자아존중감과 삶의 만족에 미치는 영향을 실증적으로 검증하고, 아울러 이들 반영구화장 서비스품질과 삶의 만족 간의 관계에 있어서 자아존중감의 매개효과를 검증하는데 목적을 두었다. 이를 위해 광주광역시에 거주하는 20대 이상 남녀 반영구화장 경험고객 및 관심고객 530명을 조사대상으로 설문조사를 수행하였다. 수집된 자료의 통계 처리는 SPSS 25.0 프로그램을 이용하여 분석하였다. 본 연구의 가설검증 결과를 중심으로 주요 결과를 제시하면 다음과 같다. 첫째, 반영구화장에 대한 지각된 서비스품질이 반영구화장 피시술자의 자아존중감에 미치는 영향을 검증하였다. 검증 결과, 반영구화장에 대한 지각된 서비스품질의 하위 요인 중에서 시술기술, 시술전문가, 시술절차는 자아존중감에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 이 가운데 피시술자의 자아존중감에 미치는 영향력은 시술전문가, 시술절차, 시술기술 순으로 나타났다. 둘째, 반영구화장 피시술자의 자아존중감이 삶의 만족에 미치는 영향을 검증하였다. 검증 결과, 반영구화장 피시술자의 자아존중감은 삶의 만족에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 반영구화장에 대한 지각된 서비스품질이 반영구화장 피시술자의 삶의 만족에 미치는 영향을 검증하였다. 검증 결과, 반영구화장에 대한 지각된 서비스품질의 하위 요인 중에서 시술기술, 시술절차는 삶의 만족에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 이 가운데 피시술자의 삶의 만족에 미치는 영향력은 시술기술, 시술절차 순으로 나타났다. 넷째, 반영구화장 피시술자의 자아존중감이 삶의 만족에 미치는 영향에 있어서 자아존중감의 매개효과를 검증하였다. 검증결과, 반영구화장에 대한 지각된 서비스품질의 하위 요인 중에서 시술기술이 삶의 만족에 미치는 영향에 있어서 자아존중감의 매개효과가 있었으며, 시술절차가 삶의 만족에 미치는 영향에 있어서도 역시 자아존중감의 매개효과가 있었다. 이상의 결과를 종합해 볼 때, 반영구화장은 피시술자의 자아존중감과 삶의 만족에 긍정적인 영향을 미치고 있음을 알 수 있고, 반영구화장 시술 시 내가 원하는 스타일로 시술할 수 있는 전문가의 능력과 높은 기술 수준 그리고 시술기술 및 절차에 대한 신뢰가 있을 경우, 피시술자는 시술 후 자신의 외모 향상에 대한 기대와 믿음에 따라 자아존중감이 높아지게 되고 이러한 높아진 자아존중감은 궁극적으로 일상 삶에 있어서 만족도 또한 높여줄 수 있음을 확인할 수 있다. The purpose of this study is to empirically verify the effect of customer’s perceived service quality for semi-permanent makeup on their self-esteem and life satisfaction, and to verify the mediated effect of self-esteem in relation to the perceived service quality and life satisfaction. For this purpose, 530 male and female customers more than 20s living in Gwangju Metropolitan City were surveyed. Statistical processing of collected data was analyzed using the SPSS 25.0 program. The main results of the hypothesis test in this study are presented as follows. First, the effect of perceived quality of service on semi-permanent makeup on customer’s self-esteem was verified. The results showed that among the sub-factors of perceived service quality for semi-permanent makeup, treatment techniques, treatment specialists and procedures have a significant positive effect on self-esteem. Among them, the effect on the self-esteem was shown in the order of procedure experts, procedure processes, and procedure techniques. Second, the effect of customer’s self-esteem on life satisfaction was verified. The results showed that the customer’s self-esteem has a significant positive effect on their life satisfaction. Third, the effect of perceived service quality on semi-permanent makeup on customer’s life satisfaction was verified. The results showed that among the sub-factors of perceived service quality for semi-permanent makeup, the treatment technique and procedure processes have a significant positive effect on life satisfaction. Among them, the influence on the customer’s life satisfaction was shown in order of procedure technology and procedure processes. Fourth, the mediated effect of self-esteem was verified in the effect of self-esteem on life satisfaction. As a result of verification, among the sub-factors of perceived service quality for semi-permanent makeup, there was a significant mediating effect and there was also a mediating effect of self-esteem in the effect of procedure processes on life satisfaction. Combining the above results, it can be seen that semi-permanent makeup have a positive effect on customer’s self-esteem and life satisfaction, and if they have confidence in the skills and the semi-permanent cosmetic procedure, the customers will be more self-esteeming and will ultimately enhance their satisfaction in their daily lives.

풍력발전단지의 접지시스템 설계 및 분석에 관한 연구

문해열 조선대학교 산업기술창업대학원 2021 국내석사

국제적 산업발달과 경제성장은 인간생활에 많은 변화를 가져왔다. 이러한 변화를 가능하게 하는 전기에너지의 안정적인 공급과 생산은 시간이 지날수록 그 중요성이 커지고 있다. 그러나 화석연료의 고갈과 지구 환경오염, 미세먼지 증가로 인한 대기환경오염과 기상이변이 심각한 문제로 대두됨으로써 세계의 많은 국가들은 환경적, 경제적 측면에서 전기에너지원의 전환을 시도하고 있다. 따라서 신재생에너지원은 친환경 에너지로써 세계전력생산량에서 그 비중이 증가하고 있으며 미래의 핵심에너지원으로 각광받고 있다. 신재생에너지발전기술 중 하나인 풍력발전기술은 바람자원을 이용하여 풍력발전기의 터빈을 통해 운동에너지를 전기에너지로 전환하여 발전하는 방식이다. 대다수의 상용 풍력발전기는 수평축 형 발전기가 이용되고 있으며 날개격인 블레이드(BLADE), 발전기 및 변환기 등으로 구성된 나셀(NACELL), 블레이드와 나셀을 지탱하는 타워(TOWER), 타워를 지면이나 해상에 고정하는 파운데이션(FOUNDATION) 등으로 구성되어 있다. 통상적으로 4[m/s] 이상의 풍속에서 기동하며 타 신재생에너지 설비에 비하여 소요되는 부지가 비교적 작고 육상풍력발전기는 단위기당 5[MW]급이 상용화 되었고 해상풍력발전기의 경우 15[MW]급의 상용화가 예견되므로 단위기당 출력이 타 신재생에너지원에 비해 높아 발전가능성이 매우 높은 발전원이다. 또한 대형풍력발전기의 설치기술 발달로 인해 산악지대, 해안가, 해상을 중심으로 발전단지의 대용량 구성이 용이해 짐으로써 그 활용범위는 더욱 커질 전망이다. 그러나 풍력에너지의 특성상 풍력발전기는 산악지대, 해안지역, 해상 등에 설치되며 구조물도 매우 높아서 낙뢰 및 서지에 노출되기 쉽고 다수의 발전기가 통합되어 전력을 공급하게 된다. 그러므로 풍력발전설비 전력계통에 사고가 발생하게 되면 대용량의 지락전류, 고장전류, 서지전류 등이 연계되는 전력시스템에 위험요소로써 작용하여 인명피해, 전력품질악화, 경제적 손실 등을 끼치고 그 파급력은 대단히 커질 수 있으므로 전력설비의 안전과 보호는 매우 중요하다.[1]∼[3] 전력계통의 사고로부터 전력설비를 보호하기 위해 접지시스템이 설치되고 있다. 접지시스템은 인축의 보호, 낙뢰 및 사고전류의 신속한 방전, 차단장치의 신속한 동작 등에 필요한 최소한의 보호조치로 제시되고 있다. 우리나라의 경우 전기설비기술기준, 한국전기설비규정(KEC), 한국전력의 변전설계기준 및 분산형전원 연계기술기준, 산업안전보건기준 등에 의해 전력설비의 접지시스템에 대해 규정되어 있다.[1]∼[6] 풍력발전기의 접지시스템은 공통, 통합 접지를 설치하고 있으며 대지의 암질, 수분, 염분 등에 의해 변화하는 대지저항률에 의해 단위호기별 개별 접지와 풍력단지 전체의 등전위 접지로 시공 운영되고 있다. 본 논문에서는 산악지대에 설치된 풍력발전단지의 단위호기별 개별 접지시스템방식과 등전위 접지시스템방식에 대해 논하고자 한다. 강원도 태백시 소재의 21[MW]급 풍력발전단지에 설치되어 있는 4.2[MW]급 풍력발전기 5기에 대해 단위기당 개별 접지시스템과 5기를 연접한 등전위 접지시스템을 비교함으로써 효과적인 접지시스템의 설계를 도출하고자 한다. 각 풍력발전기 설치장소의 대지저항률을 측정하고 CDEGS Simulation 프로그램으로 대지의 구조, 접지저항, 대지전위상승(GPR), 최대 허용 접촉접압(Etouch), 최대 허용 보폭전압(Estep), 최대 예상 접촉전압(Et), 최대 예상 보폭전압(Es)을 분석하고자 한다. 이러한 분석을 통하여 접지방식을 비교하고 효과적인 접지설계를 통한 접지시스템의 안전성과 신뢰성을 향상시키고자 한다. Wind power generation facilities are renewable energy resources with great potential for power generation, but they are installed in mountainous areas, coastal areas, and offshore areas, and their structures are very high, so they are easy to be exposed to lightning and surges. In addition, since a number of generators are integrated to supply power to the existing power system, if an accident occurs, it can act as a risk factor in life, power quality, economy, etc. due to earth fault current and fault current. The grounding system of wind power generation facilities has been proposed as a minimum protection measure, such as protection of human life, rapid discharge of lightning and fault current, and rapid operation of cut-off devices. The grounding method of a wind turbine can be installed as an individual grounding system of the generator and an equipotential grounding system of the entire wind farm by the soil resistivity that varies depending on the type of grounding, humidity, and temperature change. In this paper, we will discuss the individual grounding system of wind turbines installed in the mountainous area and the equipotential grounding system of the entire wind farm. Measure the earth resistance at the installation site of the wind turbine, and use the CDEGS simulation program to determine the structure of the soil, soil resistivity, grounding resistance, maximum ground potential rise voltage(GPR), maximum allowable touch voltage(Etouch), maximum allowable step voltage(Estep), maximum expected touch voltage(Et), maximum expected step voltage(Es) were compared and analyzed. The grounding resistance(Rg) of the individual grounding system of the wind turbine was higher than the reference value, and the maximum ground potential rise voltage(GPR) was also very large, which was confirmed as an inappropriate method. However, it was confirmed that the grounding resistance(Rg) and the maximum ground potential rise voltage(GPR) of the equipotential grounding system were lower than the reference values. It is judged that the grounding resistance is reduced and the potential hardness is eased as the grounding system's equipotential configuration increases the installation length of the grounding conductor, thereby securing safe touch voltage and step voltage. The equipotential grounding system of a wind farm is considered to be an effective grounding method because it has several advantages such as reducing the effect of potential interference and potential difference by reducing the potential gradient when an fault current flows in, and reducing ground resistance. Through this paper, since the grounding system of a wind farm is an important system to protect power facilities and people, it is necessary to accurately grasp the characteristics of the earthing, consider the environmental impact, grounding method, and the type of grounding electrode, and reflect it in the grounding design.

모노테르펜을 함유한 비자나무(Torreya nucifera) 잎 유기용매 추출물의 항산화, 항염증 및 신경보호 효과

김준건 조선대학교 산업기술창업대학원 2024 국내석사

Antioxidant, anti-inflammatory and neuroprotective effects of Torreya nucifera organic solvent extract containing monoterpene Jun-geon Kim Advisor: Prof. Hyun-Jae Shin, Ph.D. Department of Beauty and Cosmetology, Graduate School of Industrial Technology and Entrepreneurship, Chosun University Torreya nucifera leaf extract showed antioxidant, anti-inflammatory, and cognitive function inhibition physiological activities. In particular, the ABTS antioxidant activity and AChE inhibitory activity test results showed similar patterns, and the SFE extract, which had the best antioxidant activity, was confirmed to effectively inhibit NO even at low concentrations. As a result of conducting a substance analysis to identify the active substances for various physiological activities of Torreya nucifera leaf extract, isopulegol, which had not been identified in previous Torreya nucifera studies, was confirmed in the Torreya nucifera leaf SFE extract. Isopulegol is a monoterpenoid that exhibits excellent anti-inflammatory, pain relieving, and neuroprotective effects. It is thought that the physiological activity of isopulegol affects the AChE inhibitory ability of Torreya nucifera leaf SFE extract. Therefore, the excellent antioxidant, anti-inflammatory, and AChE inhibitory effects of Torreya nucifera leaves are expected to be effective in developing fragrance products utilizing the physiological activity of Torreya nucifera leaves.

메타정보기반 이미지얼굴표정인식개선 : 이미지 얼굴 표정 인식 개선

문형주 조선대학교 산업기술창업대학원 2024 국내석사

Improved Recognition of Facial Expressions in Images based on Meta Information Moon, HyeongJu Advisor : Prof. Shin, JuHyun Ph.D. Department of Software Convergence Engineering Graduate Schoo lof Industrial Technology and Entrepreneurship, Chosun University Due to the impact of the pandemic and the development of ICT technology in the era of the 4th industrial revolution, the use of non-face-to-face /unmanned systems is expanding, human facial expression recognition plays an important role in interpersonal relationships and non-verbal communication, and research on emotion recognition through human facial expressions has been ongoing for a long time. Recently, various artificial intelligence technologies are achieving higher performance in various applications than conventional methods that do not utilize artificial intelligence [1] In this regard, many researchers are proposing machine learning and deep learning models to improve image facial expression emotion recognition, and most emotion recognition studies are solving problems in various fields by using deep learning models after extracting various facial expression features of facial images [2]. Therefore, this study aims to improve image facial expression recognition by utilizing meta-information of Korean complex image data of AI Hub (AI-Hub), an integrated platform operated by the Korea Intelligence Information Society Agency. Existing facial expression emotion recognition studies utilize a large amount of data to improve accuracy. However, learning a large amount of data requires high computing power and requires the experimental environment and the collection of a large amount of data. To improve this, we propose an emotion recognition method using age and gender, which are meta information of image data, to improve emotion recognition performance even with a small amount of data. The face was detected through the Yolo v2 Face model in the original image data, and a series of emotion classification processes were proposed to classify emotions after age and gender classification with the VGG16 model using the meta information of the image data, and the effect was evaluated. Based on the meta-information included in the image data, data classification was conducted by age (10-50s) and gender (male and female), and then 10 emotion recognition models were created using the EfficientNet model with the best emotion recognition performance among VGG, ResNet, and EfficientNet models. Next, it was confirmed that the accuracy performance of the learned model improved by classifying meta-information-based data and comparing and evaluating the performance of the learned model with the whole data that was not classified. The total data that is not classified is a total of 70,000 sheets, and the data of the proposed model is 7,000 sheets, which is 1/10 of the total data. For this reason, the significance of this study can be found in that it proposes a method to improve performance with low computing power when recognizing the proposed meta-information-based image facial expression.

120MPa 고성능 강섬유 시멘트 복합체의 압축, 인장, 휨 및 전단 특성

양진영 조선대학교 산업기술창업대학원 2024 국내석사

Compressive, Tensile, Bending and Shear Characteristics of 120MPa High Performance Steel Fiber Cement Composites Yang Jin Young Advisor : Prof. Cho Chang-Geun, Ph.D. Department of Architectural Engineering, Graduate School of Chosun University In this study, in order to solve problems such as brittle behavior of general concrete and weak properties on the impact of the external environment, a high-performance fiber cement composite mixing design was proposed by utilizing fiber cement composite according to the mixing ratio of steel fibers. To verify the high performance, high durability, and high fluidity of the proposed mixing design, mechanical experiments of fiber cement composite according to steel fiber mixing ratio were performed and basic data were secured. The fiber cement composite is a cement composite mixing fiber. If fibers are mixed with general concrete mixing, sufficient performance cannot be secured due to the lack of viscosity of concrete. In order to secure sufficient performance, a combination of high-strength concrete is required. In addition, performance is affected by the type, mixing rate, arrangement, etc. of fibers. Due to the material characteristics of irregular concrete, the performance is affected by the mixing when pouring concrete and the capacity of the mixed mixture. Therefore, mechanical data and basic studies are needed to utilize a high-performance fiber cement composite mixed with fibers. In this study, a combination of fiber cement composites mixed with steel fibers was proposed using a high-strength concrete combination. The mixing ratio of steel fibers were planned as 0.0%, 0.5%, 1.0%, 1.5%, and 2.0%. It has high compression and tensile strength, and has high toughness and high ductility properties. In addition, it has a dense structure to have high resistance to the effects of external environments such as carbonation, salt dissolution, and freeze melting. At the same time, fluidity was high, so mixing was minimized and excellent workability was achieved. In order to verify the performance of the mix proposed in this study, mechanical experiments such as slump flow, compression, tension, bending tension, and shear according to the steel fiber mixing ratio were performed. Based on the results of the mechanica experiment, it was confirmed that the mechanical performance of the fiber cement composite was improved when steel fibers were mixed. In addition, it behaves in the form of ductility failure, and due to its high fluidity, the performance of high performance, high durability, and high fluidity was confirmed. Through this, it is believed that sufficient basic data have been secured. It is believed that research and development through experiments are necessary by applying this to structural members.

정밀기계부품용 Core Index Type 이중 사출 연결 Bolt 구조의 강도해석에 관한 연구

이준호 조선대학교 산업기술창업대학원 2023 국내석사

Recently, the need to increase injection capacity has been raised to cope with the increase in demand for double injection products, making it inevitable to use cores that have increased in weight compared to before. However, in the index core rotation method, structural stability of the core support of the existing injection equipment is essential to use the increased core. Due to the nature of the injection equipment, safety problems and cost problems arise in the structural change or experimental optimization process, so the problem solving method using CAE tool was selected. The results of the weight increase of the core were derived through structural analysis, and the stability of the axis by motion such as protrusion and rotation of the core axis was first reviewed through ANSYS structural analysis. In addition, the stability of each member supporting the core was analyzed secondarily using the COMSOL tool to analyze the safety of the support shaft according to the increase in core weight of the index core rotation method. As a result of the study, it was confirmed that the yield stress value of the material on the axis was not exceeded due to the increase in core weight, but it was confirmed through a multi-physical analysis that shaking in the Z-axis occurred during behavior. This shaking is confirmed to be reduced by the application of friction force between the core and the index axis, which offsets the stability of the core and the stress applied to the bolt and affects stability. As the weight of the core increases, permanent deformation of the shaft or bolt does not occur, but the amount of slack on the Z axis increases, so it is necessary to establish a core weight increase standard based on this. 최근 이중 사출 제품 수요 증가에 대응하기 위해 사출 능력을 높일 필요성이 제기되면서 이전보다 무게가 늘어난 코어 사용은 불가피한 상황입니다. 그러나 인덱스 코어 회전법에서는 증가된 코어를 사용하기 위해서는 기존 사출장치 코어 지지체의 구조적 안정성이 필수적입니다. 사출장치 특성상 구조변경 및 실험 최적화 과정에서 안전성 문제와 비용 문제가 발생하므로 CAE 툴을 활용한 문제해결 방법을 선정하였습니다. 구조해석을 통해 코어의 중량증가 결과를 도출하였고, 먼저 ANSYS 구조해석을 통해 코어축 돌출과 회전 등 운동에 의한 축의 안정성을 검토하였습니다. 또한 COMSOL 툴을 사용하여 코어를 지지하는 각 부재의 안정성을 이차적으로 분석하고 인덱스 코어 회전법의 코어 중량 증가에 따라 지지축의 안전성을 분석하였습니다. 연구 결과 코어 무게 증가로 축상 물질의 항복 응력값을 초과하지 않은 것으로 확인되었으나 거동 중 Z축에서 흔들림이 발생한 것은 다중 물리적 분석을 통해 확인되었습니다. 이 흔들림은 코어와 인덱스 축 사이에 마찰력이 가해짐으로써 감소하는 것으로 확인되어 코어의 안정성과 볼트에 가해지는 응력을 상쇄하여 안정성에 영향을 줍니다. 코어의 무게가 증가함에 따라 샤프트나 볼트의 영구변형은 발생하지 않지만 Z축의 처짐량이 증가하므로 이를 기반으로 코어 중량 증가 기준을 마련해야 합니다.

일반철도 6.6kV 비접지 고압 배전계통의 방향성 지락계전기에 관한 연구

최철웅 조선대학교 산업기술창업대학원 2023 국내석사

한국철도의 수·변전설비 및 배전선로 전력 계통은 한국전력공사로부터 철도 주요 수전실에 특고압(22.9kV) 전압의 2회선(주·예비) 라인으로 전력을 공급 받아 변압 과정을 거쳐, 각 중간역 2회선(주·예비) 고압(6.6kV)의 전압으로 다시 보내는 시스템이다. 이 수·변전설비 및 배전선로 계통에서 단락 및 지락 사고가 발생하면 과전류에 의해 전기설비에 손상이 발생하여 전력 계통 내의 설비 오동작을 초래하게 된다. 이런 사고는 고객의 안전과 열차의 안전 운행에 위협할 수 있으므로 신속하게 사고(장애)를 제거하여야 하며, 수·변전설비 및 배전선로 계통의 적절한 보호를 위해 노력하여야 한다. 본 논문에서는 한국철도공사 광주지역관리단에서 운용하는 일반철도 6.6kV 비접지 고압 배전계통의 지락보호계전기의 오동작 원인을 분석하였다. 또한 기존 지락보호시스템의 문제점을 도출, 이를 보완할 수 있는 방법을 제안하고 전기철도 환경에 가장 적합한 방향성 지락보호시스템으로 개선 적용하였다. 개선 후 현재까지 지락사고 발생 시 인접 정상선로의 동시 트립되는 사고(장애)는 더이상 발생하지 않았으며, 지락보호계전시스템 체계를 보다 더 향상시킬 수 있었다. 이를 바탕으로 미래의 전기철도 전력설비 안정성 향상 및 고객의 안전, 열차 안전운행에 크게 기여할 수 있을 것으로 기대한다. The power substation facilities and distribution line power systems of Korea Railroad Corporation (KORAIL) is a system in which power is supplied from the Korea Electric Power Corporation (KEPCO) to two lines (main and reserve) of extra-high voltage (22.9 kV), transforms it, and sends it back to each intermediate station as two lines (main and reserve) of high voltage (6.6 kV). When short-circuit and ground fault accidents occur in these power substation facilities and distribution line power systems, overcurrent damages electrical equipment and causes facility malfunctions in the power system. These accidents can threaten the safety of customers and the safe operation of trains, so it is necessary to quickly eliminate the accidents (faults) and strive for proper protection of the substation facilities and distribution line systems. This thesis analyzes the causes of malfunction of the ground fault protection relay in the 6.6kV ungrounded high-voltage distribution system of the general railway operated by the Gwangju Regional Management Team of the KORAIL. It also identifies the problems of the existing over current ground relay (OCGR), proposes a method to compensate it, and improves it to a directional ground relay (DGR) system that is most suitable for the electric railway environment. As a result of the improvement, there have been no longer accidents (faults) that simultaneously trip to adjacent normal lines in the ground fault accident, and the ground protection relay system has been further improved. Based on this thesis, it is expected that it will greatly contribute to improving the stability of electric railway power facilities, customer safety, and train safety in the future.

보안 취약점 데이터 기반 보안 지식 그래프 구축 및 확장

안현진 조선대학교 산업기술창업대학원 2024 국내석사

Construction and Expansion of a Security Knowledge Graph Based on Vulnerability Data HyunJin An Advisor : Prof. JunHo Choi, Ph.D Industrial Technology and Entrepreneurship Chosun University Recently, various studies are being conducted to build and apply knowledge graphs from text data. In the security field, the need for knowledge graphs is increasing to respond to new security vulnerabilities. There is a lot of research going on to create a security knowledge graph. However, because security vulnerabilities continue to arise, updating the security knowledge graph is essential. Therefore, in this paper, it will be suggested a method to 1) cluster of Vulnerability data based on text similarity and delete less relevant data, 2) extract Relation Triples from Vulnerability data using the REBEL model, 3) expand the knowledge graph using Google News data related to Entities. The expanded knowledge graph is expected to increase accuracy in tasks such as link prediction. In the experiment of this paper, Four embedding models, "ComplEx", "TransE", "DistMult", and "HolE", were trained using the generated knowledge graph. Afterwards, it was evaluated using the “MMR”, “MR”, and “Hits@N”. As a result, the “HolE” model showed the highest performance. Also it was confirmed that the expansion of the knowledge graph increases the performance of the embedding model.

IEC 61850 기반 전력감시 시스템을 위한 이기종 데이터 연계 방안

박흥서 조선대학교 산업기술창업대학원 2020 국내석사

IEC 61850 기술은 국내에 2010년 부터 디지털 변전소 자동화시스템을 통해 적용 해오고 있으며 전력설비 감시, 진단, 분야 등에 확대 적용되고 있는 추세이다. 송변전 분야도 전력구, 케이블의 상태 진단을 위한 빅데이터 구축을 위해 변전설비 감시, 진단 분야에서 사용하고 있는 IEC 61850 프로토콜을 적용하여 상태 진단 시스템을 구축 중 이다. 그동안 송전 전력구 지중케이블 감시진단 분야의 경우 시스템의 폐쇄성 때문에 이러한 통신 프로토콜의 표준화 흐름에 따르지 않고 시장을 독점하고 있는 제조사에서 제공하는 PLC, Modbus 기반의 자체 프로토콜을 사용하고 있어 이를 IEC 61850 기반 의 시스템에서 통합관리를 위해선 제조사 자체 프로토콜과 전력계통에서 활용되는 프 로토콜간의 연계가 요구된다. 그러므로 본 논문에서는 기존 전력구에서 활용되는 PLC 프로토콜을 전력계통에서 활용되는 IEC 61850 프로토콜 간의 연계를 위해 IEC 61850과 PLC 프로토콜의 특징에 대해 연구하고, IEC 61850을 기반으로 데이터 모델과 서비스 간 연계를 위한 IEC 61850 통신 인터페이스 구현 방안을 제시한다. 또한, 제안하고 구현된 인터페이스를 통 해 실증을 통한 연계 결과를 보인다. IEC 61850 technology has been applied in Korea through a digital substation integrated automation system since 2010, and is being applied to power facility monitoring, diagnosis, and field applications. In the meantime, in the field of power transmission and underground cable monitoring and diagnosis, the system is closed, so it does not follow the standard flow of these communication protocols, and uses its own protocol based on PLC and Modbus provided by manufacturers that monopolize the market. It is based on IEC 61850. For integrated management and data linkage in the system, it is necessary and required to link the PLC-based manufacturer's own protocol and the power system in the transmission and substation field. Therefore, in this paper, we study the characteristics of the PLC protocol and IEC 61850 to link the PLC protocol and Modbus used in the existing power tools with the IEC 61850 protocol, which is gradually expanding in the field of power system transmission and substation. It proposes a data linkage implementation method for integrating the electric power system into an IEC 61850 based system. In addition, through the presented and implemented interface, it shows the linkage result through demonstration.