머신러닝을 활용한 취업 예측 모델 설계: D대학교 졸업생을 중심으로

김성국,오창헌,Kim, Sungkook,Oh, Chang-Heon 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.1

Recently, youth unemployment, especially the unemployment problem of university graduates, has emerged as a social problem. Unemployment of university graduates is both a pan-national issue and a university-level issue, and each university is making many efforts to increase the employment rate of graduates. In this study, we present a model that predicts employment availability of D-university graduates by utilizing Machine Learning. The variables used were analyzed using up to 138 personal information, admission information, bachelor's information, etc., but in order to reflect them in the future curriculum, only the data after admission works effectively, so by department / student. The proposal was limited to the recommended ability to improve the separate employment rate. In other words, since admission grades are indicators that cannot be improved due to individual efforts after enrollment, they were used to improve the degree of prediction of employment rate. In this research, we implemented a employment prediction model through analysis of the core ability of D-University, which reflects the university's philosophy, goals, human resources awards, etc., and machined the impact of the introduction of a new core ability prediction model on actual employment. Use learning to evaluate. Carried out. It is significant to establish a basis for improving the employment rate by applying the results of future research to the establishment of curriculums by department and guidance for student careers.

한국의 카보타지를 위한 선원양성에 관한 연구

김성국,Kim, Sung-Kuk 해양환경안전학회 2015 해양환경안전학회지 Vol.21 No.6

무역장벽의 일종인 카보타지는 자국내 내항해운업을 보호하여 왔다. 자국에서 건조한 선박으로 자국 선원이 승선하여 자국의 화물을 운송한다는 카보타지를 운영한 미국은 조선산업과 해운 연관산업이 유지되어 왔다. 그리고 대부분의 국가는 경제적 이유와 유사시 대처라는 이유 때문에 자국적 선박을 통해 저탄소 운송인 내항해운을 담당하는 카보타지를 운영하고 있다. 카보타지를 유지하기 위해서는 선원의 안정적인 공급이 필요하다. 선원의 안정적인 공급은 선원양성 교육기관의 안정적인 운영에 달려있기 때문에 법률적인 검토가 필요하다. 본 연구에서는 내항해운의 안정적 선원공급을 통한 카보타지 확립에 관련하여 우리나라 내항해운의 문제점과 선원 실태를 분석하였다. 분석결과 미국과 같은 선원양성에 관련한 법률을 제정하거나 정비할 필요가 있음을 확인하였다. The cabotage rule has been protecting the domestic industry from foreign competitions as a kind of trade barrier. In the United States, the shipbuilding industry has been maintained with the help of to the strict cabotage operations by reinforcing advantages for domestic crews and ships which are built in the U.S. For most countries, cabotage has been granted legitimacy in their coastal shipping by Low Carbon Transport in terms of economic and emergency reasons. The cabotage rule is required in the stable supply of the seafarers which rely on the legitimate maritime education. This study analyzes Korean cabotage system and the problems with regard to seafarers education. It is found that the resolution is set up the cabotage act such as Jones Act, U.S.

투입구 높이 및 내부 드럼 깊이를 고려한 펄세이터 세탁기 사용시 평균신장 사용자의 관절 토크 및 근력에 미치는 영향

김성국,조영근,이남기,유승현,임도형,김한성,고창용,Kim, Seong Guk,Cho, Young Kuen,Lee, Nam Gi,You, Joshua Sung Hyun,Lim, Dohyung,Kim, Han Sung,Ko, Chang-Yong 대한의용생체공학회 2012 의공학회지 Vol.33 No.4

Many studies have reported that housework done using household appliances may affect biomechanical characteristics of the musculoskeletal system. The purpose of this study was to investigate the effects of housework done using a pulsator washing machine on joints and muscles. We calculated joint torques and muscle strengths on the basis of an experimental/virtual three-dimensional motion analysis for six healthy females using the pulsator washing machine at different heights (H) and depths (D) of the inside drum (H (mm){\times}D (mm), Trial1: $962.5{\times}609.4$, Trial2: $962.5{\times}624.4$, Trial3: $982.5{\times}644.4$, Trial4: $995.5{\times}642.4$, Trial5: $1015.5{\times}677.4$). The joint torques and muscle strengths tended to be considerably different during torso flexion in the sagittal plane for all the trials. The maximum joint torques for the thoracic vertebra, left ankle, and right shoulder measured in Trial4 were significantly higher than those measured in the other trials (p < 0.05); in addition, those for the thoracic vertebra and both ankles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). The maximum muscle strengths for the left trapezius muscle and both tibialis anterior muscles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). These results indicate that housework done using a pulsator washing machine may affect joint torques and muscle strengths, and these effects are dependent on the height and/or depth of the inside drum of the pulsator washing machine.

The colchicine derivative CT20126 shows a novel microtubule-modulating activity with apoptosis

김성국,Sang-Min Cho,김호,석헌,Soon-Ok Kim,권택규,장종수 생화학분자생물학회 2013 Experimental and molecular medicine Vol.45 No.4

New colchicine analogs have been synthesized with the aim of developing stronger potential anticancer activities. Among the analogs, CT20126 has been previously reported to show immunosuppressive activities. Here, we report that CT20126 also shows potential anticancer effects via an unusual mechanism: the modulation of microtubule integrity and cell cycle arrest at the G2/M phase before apoptosis. When we treated COS-7 cells with CT20126 (5 lM), the normal thread-like microtubules were disrupted into tubulin dimers within 10min and thereafter repolymerized into short, thick filaments. In contrast, cells treated with the same concentration of colchicine exhibited microtubule depolymerization after 20min and never underwent repolymerization. Furthermore, optical density (OD) analysis (350nm) with purified tubulin showed that CT20126 had a higher repolymerizing activity than that of Taxol, a potent microtubule-polymerizing agent. These results suggest that the effects of CT20126 on microtubule integrity differ from those of colchicine: the analog first destabilizes microtubules and then stabilizes the disrupted tubulins into short, thick polymers. Furthermore, CT20126 induced a greater level of apoptotic activity in Jurkat T cells than colchicine (assessed by G2/M arrest, caspase-3 activation and cell sorting). At 20nM, CT20126 induced 47% apoptosis among Jurkat T cells, whereas colchicine induced only 33% apoptosis. Our results suggest that the colchicine analog CT20126 can potently induce apoptosis by disrupting microtubule integrity in a manner that differs from that of colchicine or Taxol.

국가 인적자원 개발과 대학교육

김성국,Kim, Seong-Guk 한국대학교육협의회 2000 大學敎育 Vol.104 No.-

철 광물에 의한 염소계 유기화합물의 환원적분해

김성국,박상원,Kim, Sung-Kuk,Park, Sang-Won 한국지하수토양환경학회 2004 지하수토양환경 Vol.9 No.2

Chlorinated and nitroaromatic compounds are non-degradable substances that are extremely toxic and are known to be carcinogens and mutation causing agents. Moreover, the half-lives of substances such as carbon tetrachloride, hexachloroethane and nitroaromatic compounds are several decades. In this study, the optimal conditions to detoxify chlorinated compounds by the reductive degradation were investigated. The following results were obtained in the reductive degradation of CCl$_4$, C$_2$Cl$\_$6/, C$_2$HCl$\_$5/, C$_2$Cl$_4$, and C$_2$HCl$\_$5/ by using Fe, FeS and FeS$_2$ as mediators. CCl$_4$ was reduced to CH$_2$Cl$_3$ and CH$_2$Cl$_2$in anaerobic conditions when FeS was used as a mediator. While the reduction of CCl$_4$ to CHCl$_3$ was rapidly proceeded, the reduction of CHCl$_3$ to CH$_2$Cl$_2$ was occurred slowly. Further reduction to CH$_3$Cl was not observed. Unlike CCl$_4$, C$_2$Cl$\_$6/ was degraded to C$_2$HCl$\_$5/, C$_2$Cl$_4$. C$_2$HCl$_3$ and cis-1,2-C$_2$H$_2$Cl$_2$ by complicated pathways such as hydrogenolysis, dehalo-elimination and dehydrohalogenation. A small amount of C$_2$HCl$\_$5/ was detected only in the early stages of the reduction. However, majority of the C$_2$Cl$\_$6/ was reduced to C$_2$Cl$_4$. cis-1,2-C$_2$H$_2$C1$_2$ was the only product among other possible isomers. 염소계 및 니트로계 유기 화합물은 발암물질 또는 돌연 변이성 유발물질로 인체에 매우 유독한 물질로 알려 져있다. 특히 사염화탄소,헥사클로로에탄 또는 니트로계 방향족 화합물은 자연계에서 분해되는 반감기는 수십 년이 걸린다. 이 연구에서는 염소계 유기화합물의 환원적 분해반응으로 무독화하는 것을 목적으로 한다. Fe$^{0}$ , FeS와 FeS$_2$를 반응 매개물로 이용해서 $CCl_4$, $C_2$Cl$_{6}$, $C_2$HCl$_{5}$ , $C_2$Cl$_{4}$와 $C_2$HCl$_3$의 환원적 분해반응에서 다음과 같은 결과를 얻었다. $CCl_4$ 는 FeS을 반응 매개물로 혐기성 조건에서 CHCl$_3$와 CH$_2$Cl$_2$로 환원적 분해반응을 하였다. $CCl_4$에서 CHCl$_3$으로 환원반응은 매우 빠르게 일어나는 반면 CHCl$_3$에서 CH$_2$Cl$_2$로 분해되는 반응속도는 매우 느리게 일어났다. $C_2$Cl$_{6}$는 $CCl_4$와 달리 복잡한 반응 경로로 환원적 분해 반응을 하였으며, 수소첨가 반응, 탈염소제거반응과 탈수소탈염소화반응으로 $C_2$HCl$_{5}$ , $C_2$Cl$_4$, $C_2$HCl$_3$와 cis-1,2-C$_2$H$_2$Cl$_2$의 환원 생성물로 분해되었다. 반응 초기에 소량의 $C_2$HCl$_{5}$ 생성물이 확인되었으며, 대부분 $C_2$HCl$_4$으로 환원반응 하였다. 특히 $C_2$HCl$_3$에서 환원반응 생성물로 cis-1,2C$_2$HCl$_2$만이 생성물로 나타났고, trans-1,2-C$_2$H$_2$Cl$_2$ 또는 1,1-C$_2$H$_2$Cl$_2$은 생성물로 나타나지 않았다.

철 광물에 의한 헥사클로에탄의 환원적 분해: 반응 속도 연구

김성국,박상원,Kim, Sung-Kuk,Park, Sang-Won 한국지하수토양환경학회 2004 지하수토양환경 Vol.9 No.2

수용액상에서 철광물질과 유기 용매간의 반응 속도는 여러 반응인자에 따라 반응 속도 실험을 하였다 F $e^{0}$ , FeS와 Fe $S_2$를 반응 매개물로 $C_2$C $l_{6}$에 대한 반응에서 F $e^{0}$ > FeS > Fe $S_2$ 순으로 분해반응 속도가 빠르게 나타났다. 철 광물질에 대해서 $C_2$C $l_{6}$, CHC $l_{5}$ , $C_2$C $l_4$, CHC $l_3$에 대한 분해 반응 속도는 염소 치환기가 적을수록 환원반응 속도는 느리게 일어난다. 환원 반응 속도는 pH, 교반 속도, 반응 온도와 비표면적에 의존적임을 확인하였다. 1,10-phenanthroline과 EDTA화합물은 고립전자 쌍을 가진 2개의 질소 원자에 의해 형성된 두 자리 킬레이트 작용기가 철 표면에 흡착하며 전자 이동 속도를 증가시켜 분해 반응 속도를 증가시킨다. 즉 분자 $\pi$* 오비탈을 가진 질소원자는 비어있는 금속에 비편재(delocalized)되어 전자이동 속도를 증가시킨다. 그리고 hydroquinone은 반응 속도에 영향을 주지 않았다. 자연계에 존재하는 카올리나이트는 철 광물질의 부식을 유발시켜 분해 반응속도를 증가시켰다. 반면 F $e^{2+}$와 S $O_4$$^{2-}$ 와 같은 이온은 반응속도에 영향을 주지 않았다. Kinetic characteristics dependent on several factors such as iron mineral and organic solvents were investigated. When F $e^{0}$ , FeS and Fe $S_2$ were used as mediators, minerals affecting reaction rate were in the following order : $Fe_{0}$ 0/ > FeS > $FeS_2$ when in contact $C_2$C $l_{6}$ . The more chloride substituted, the higher reaction rate were observed. The reaction rates were dependent on pH, shaking rate, temperature and specific surface area. 1, 10-phenanthroline and EDTA degradation rates were fast, indicating that they adsorbed on the surface of the iron which makes the electron transfer reaction easy. Nitrate which has $\pi$* orbital of molecular can increase electron transfer rate because it is delocalized in its entity. The reaction rates were not affected by hydroquinone. Degradation rates were much enhanced with naturally occurring kaolinite because of the surface corrosion of Fe mineral. However, The reaction rate was not affected by F $e^{2+}$ or S $O_4$$^{2-}$ presented in solution.n.

벤처기업 윤리경영 성공사례(6)-청정경영을 실천하는 에너지비전스

김성국,Kim, Seong-Guk 벤처기업협회 2004 벤처다이제스트 Vol.54 No.-

역량중심 교육과정 개발을 위한 학업성취도 예측 시스템: D대학 사례를 중심으로

김성국,오창헌,Kim, Sungkook,Oh, Chang-Heon 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.2

Achievement at university is recognized in a comprehensive sense as the level of qualitative change and development that students have embodied as a result of their experience in university education. Therefore, the academic achievement of university students will be given meaning in cooperation with the historical and social demands for diverse human resources such as creativity, leadership, and global ability, but it is practically an indicator of the outcome of university education. Measurement of academic achievement by such credits involves many problems, but in particular, standardization of academic achievement by credits based on evaluation methods, contents, and university rankings is a very difficult problem. In this study, we present a model that uses machine learning techniques to predict whether or not academic achievement is excellent for D-University graduates. The variables used were analyzed using up to 96 personal information and bachelor's information such as graduation year, department number, department name, etc., but when establishing a future education course, only the data after enrollment works effectively. Therefore, the items to be analyzed are limited to the recommended ability to improve the academic achievement of the department/student. In this research, we implemented an academic achievement prediction model through analysis of core abilities that reflect the philosophy, goals, human resources image, and utilized machine learning to affect the impact of the introduction of the prediction model on academic achievement. We plan to apply the results of future research to the establishment of curriculum and student guidance conducted in the department to establish a basis for improving academic achievement.

지역정보화의 추진전략

김성국,Kim, Seong-Guk 한국과학기술단체총연합회 1988 과학과 기술 Vol.21 No.7