• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.174-180
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• 2021

The necessity of this study is as follows. A decrease in the number of newborns, an increase in the youth unemployment rate, and a decrease in the employment rate are having a fatal impact on universities. To help increase the employment rate of universities, we intend to utilize Big Data of university public information. Big data refers to the process of collecting and analyzing data, and includes all business processes of finding data, reprocessing information in an easy-to-understand manner, and selling information to people and institutions. Big data technology can be divided into technologies for storing, refining, analyzing, and predicting big data. The purpose of this study is to find the vision and special department of a university with a high employment rate by using big data technology. As a result of the study, big data was collected from 227 universities on www.academyinfo.go.kr site, We selected 130 meaningful universities and selected 25 universities with high employment rates and 25 universities with low employment rates. In conclusion, the university with a high employment rate can first be said to have a student-centered vision and university specialization. The reason is that, for universities with a high employment rate, the vision was to foster talents and specialize, whereas for universities with a low employment rate, regional bases took precedence. Second, universities with a high employment rate have a high interest in specialized departments. This is because, as a result of checking the presence or absence of a characterization plan, universities with a high employment rate were twice as high (21/7). Third, universities with high employment rates promote social needs and characterization. This is because the characteristic departments of universities with high employment rates are in the order of future technology and nursing and health, while universities with low employment rates promoted school-centered specialization in future technology and culture, tourism and art. In summary, universities with high employment rates showed high interest in student-centered vision and development of special departments for social needs.

• 한국환경과학회지
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• 제23권3호
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• pp.359-368
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• 2014

The aim of our research was to apply experimental design methodology in the optimization of N, N-Dimethyl-4-nitrosoaniline (RNO, which is indictor of OH radical formation) degradation using gas mixing-circulation plasma process. The reaction was mathematically described as a function of four independent variables [voltage ($X_1$), gas flow rate ($X_2$), liquid flow rate ($X_3$) and time ($X_4$)] being modeled by the use of the central composite design (CCD). RNO removal efficiency was evaluated using a second-order polynomial multiple regression model. Analysis of variance (ANOVA) showed a high coefficient of determination ($R^2$) value of 0.9111, thus ensuring a satisfactory adjustment of the second-order polynomial multiple regression model with the experimental data. The application of response surface methodology (RSM) yielded the following regression equation, which is an empirical relationship between the RNO removal efficiency and independent variables in a coded unit: RNO removal efficiency (%) = $77.71+10.04X_1+10.72X_2+1.78X_3+17.66X_4+5.91X_1X_2+3.64X_2X_3-8.72X_2X_4-7.80X{_1}^2-6.49X{_2}^2-5.67X{_4}^2$. Maximum RNO removal efficiency was predicted and experimentally validated. The optimum voltage, air flow rate, liquid flow rate and time were obtained for the highest desirability at 117.99 V, 4.88 L/min, 6.27 L/min and 24.65 min, respectively. Under optimal value of process parameters, high removal(> 97 %) was obtained for RNO.

• 문화기술의 융합
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• 제6권1호
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• pp.515-520
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• 2020

본 연구에서는 4절 평행 링크의 설계와 실제 구현에 대한 것으로 평행 4절 링크는 한축의 회전을 다른 축의 회전 운동으로 전달하기 위한 기본적인 기구학적 메카니즘으로 널리 이용되고 있다. 그런데 평행 4절 링크는 운동 도중에 전환점에서 위상 역전이 발생하는 문제가 발생하여 실제 구현에서는 이를 고려하여 설계하여야 한다. 링크 역전을 방지하기 위해서는 추가적인 위상 역전 억제용 링크를 옵셋을 두어 붙이는 2중 평행 사변형 형태의 링크를 제작하면 되는 것으로 일부 알려져 있으나 실제 제작하여 실험한 결과 전환점에서 운동이 부드럽지 않은 현상이 발생하였다. 본 연구에서는 이 문제를 해결하기 위해 위상 역전 방지를 위한 옵셋을 주는 링크외에 보조적으로 평활한 운동을 위한 링크를 추가시켜 피동축이 구동축을 따라 회전할 때에 특정지점에서 위상 역전이 발생하지 않고 평활한 운동을 수행하는 것을 확인 할 수 있었다.

• 한국병원경영학회지
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• 제29권1호
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• pp.1-18
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• 2024

Purposes: The Common Data Model(CDM) is very important for multi-institutional research. There are various domestic and international CDM construction cases to actively utilize it. In order to construct a CDM, different terms from each institution must be mapped to standard terms. Therefore, we intend to derive the importance and major issues of terminology mapping and propose a solution in CDM construction. Methodology/Approach: This study conducted terminology mapping between Electronic Health Record(EHR) and MOA CDM for constructing Medical Record Observation & Assessment for Drug Safety(MOA) CDM at Dankook University Hospital in 2022. In the process of terminology mapping, a CDM standard terminology process and method were developed and terminology mapping was performed by applying this. The constructions of CDM mapping terms proceeded in the order of diagnosis, drug, measurement, and treatment_procedure. Findings: We developed mapping guideline for CDM construction and used this for mapping. A total of 670,993 EHR data from Dankook University Hospital(January 1, 2013 to December 31, 2021) were mapped. In the case of diagnosis terminology, 19,413 were completely mapped. Drug terminology mapped 92.1% of 2,795. Measurement terminology mapped 94.5% of 7,254 cases. Treatment and procedure were mapped to 2,181 cases, which are the number of mapping targets. Practical Implications: This study found the importance of constructing MOA CDM for drug side effect monitoring and developed terminology mapping guideline. Our results would be useful for all future researchers who are conducting terminology mapping when constructing CDM.

• 국제지역연구
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• 제15권1호
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• pp.31-60
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• 2011

메드베데프 정부는 오바마 정부의 '재설정' 정책과 글로벌 경제위기로 인한 경제 현대화의 필요성에 따라 새로운 대외정책노선을 채택했다. 새로운 대외정책의 목표는 경제 현대화를 위한 호의적인 외적 환경 조성과 대외적 자원의 효율적 이용에 있으며, 이를 위한 과제로 다른 강대국들과의 대립 회피, 국경 주변의 분쟁 방지, 외부로부터의 자본 투자와 첨단기술 도입 활성화 등이 설정되었다. 이러한 대외정책노선은 미국과는 전략적 협력의 기반 조성, 유럽과는 '현대화 동맹'을 위한 준비, 중국 및 일본과는 협력과 갈등의 관리, 탈소비에트 국가들과는 전략적 안정과 경제적 통합의 이중전략을 통해 구체화되고 있다. 그러나 새로운 대외정책노선이 미국 및 유럽과의 관계강화를 우선순위에 둔다고 해서, 그것이 1990년대 초 자유주의적 친서방 노선으로의 회귀를 의미하지는 않는다. 러시아가 '현대화' 개혁을 추진하는 궁극적인 목표는 여전히 푸틴 정부의 대외정책노선이었던 다극적 세계질서에 부합하는 강대국 러시아의 재건에 있다. 이런 맥락에서 메드베데프 정부에서 진행되고 있는 대외정책 변화는 목표의 변화 없이 그것을 실현하는 수단 또는 방식의 변화를 의미하는 '국제적 차원의 프로그램 변화(program change on international level)'로 규정할 수 있을 것이다.

• 생태와환경
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• 제41권4호
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• pp.431-440
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• 2008

Turbid water or suspended sediment is associated with negative effects on aquatic organisms; fish, aquatic invertebrate, and periphyton. Effects of turbid water on fish differ depending on their developmental stage and a level of turbidity. Low turbid water may cause feeding and predation rates, reaction distance, and avoidance in fish, and it could make fish to die under high turbidity and long period. Therefore, it is very important to find out how turbid water or suspended sediment can affect fish in domestic watersheds. The objectives of this study were 1) to introduce international case studies and their standards to deal with suspended sediment, 2) to determine acute toxicity in 4 major freshwater fishes, and 3) to determine in relation to adverse effect of macroinvertebrates and fish. Impacts of turbid water on fish can be categorized into direct and indirect effects, and some factors such as duration and frequency of exposure, toxicity, temperature, life stage of fish, size of particle, time of occurrence, availability of and access to refugia, etc, play important role to decide magnitude of effect. A review of turbidity standard in USA, Canada, and Europe indicated that each standard varied with natural condition, and Alaska allowed liberal increase of turbidity over natural conditions in streams. Even though acute toxicity with four different species did not show any fatal effect, it should be considered to conduct a chronic test (long-term) for more detailed assessment. Compared to the control, dominance index of macroinvertebrates was greater in the turbid site, whereas biotic index, species diversity index, species richness index, and ecological score were smaller in the turbid site. According to histopathological analysis with gills of macroinvertebrate and fishes, morphological and physiological modification of gills due to suspended sediments can cause disturbance of respiration, excretion and secretion. In conclusion, in order to maintain good and healthy aquatic ecosystem, it is the best to minimize or prevent impact by occurrence of turbid water in stream and reservoir. We must make every effort to maintain and manage healthy aquatic ecosystem with additional investigation using various assessment tools and periodic biomonitoring of fish.

• 한국환경보건학회지
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• 제39권5호
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• pp.426-437
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• 2013

Objective: Gotjawal refers to a special geographical designation found in Jeju Province, Korea, where vegetation forms over a rocky area. Due to the important ecological value of Gotjawal, international concern about such areas is growing. However, only limited information is available regarding environmental contamination of Gotjawal. This study was conducted in order to investigate the levels of contamination and associated ecotoxicological effects of surface water bodies in Gotjawal. Methods: Surface water samples were collected at three sampling sites in two Gotjawal areas and were analyzed for several pharmaceuticals and pesticides in consideration of the potential sources of contamination. The ecotoxicity of the samples was measured using water fleas (Daphnia magna and Moina macrocopa) and zebrafish (Danio rerio). In addition, effects on the gene transcription of zebrafish were investigated following exposure to the samples. Results: Nine pharmaceuticals were detected in the samples, but none of the target pesticides were detected. Following acute exposure to two surface water samples, the survival of waterfleas was significantly reduced, but reproduction was not affected. In zebrafish, time-to-hatch was delayed and fry survival was decreased in some samples. On the other hand, at the transcriptional level, there were no genes significantly influenced by exposure to the samples. Conclusion: This is the first study investigating environmental contamination in Gotjawal areas and associated ecotoxicities. Further studies are warranted to identify the cause of acute Daphnia toxicity and to determine potential consequences of longer-term exposure in Gotjawal areas.

• 한국환경과학회지
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• 제22권12호
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• pp.1561-1569
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• 2013

This study carried out a laboratory scale plasma reactor about the characteristics of chemically oxidative species (${\cdot}OH$, $H_2O_2$ and $O_3$) produced in dielectric barrier discharge plasma. It was studied the influence of various parameters such as gas type, $1^{st}$ voltage, oxygen flow rate, electric conductivity and pH of solution for the generation of the oxidant. $H_2O_2$ and $O_3$.) $H_2O_2$ and $O_3$ was measured by direct assay using absorption spectrophotometry. OH radical was measured indirectly by measuring the degradation of the RNO (N-Dimethyl-4-nitrosoaniline, indicator of the generation of OH radical). The experimental results showed that the effect of influent gases on RNO degradation was ranked in the following order: oxygen > air >> argon. The optimum $1^{st}$ voltage for RNO degradation were 90 V. As the increased of $1^{st}$ voltage, generated $H_2O_2$ and $O_3$ concentration were increased. The intensity of the UV light emitted from oxygen-plasma discharge was lower than that of the sun light. The generated hydrogen peroxide concentration and ozone concentration was not high. Therefore it is suggested that the main mechanism of oxidation of the oxygen-plasma process is OH radical. The conductivity of the solution did not affected the generation of oxidative species. The higher pH, the lower $H_2O_2$ and $O_3$ generation were observed. However, RNO degradation was not varied with the change of the solution pH.

• 한국정보통신학회논문지
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• 제20권8호
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• pp.1596-1606
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• 2016

오늘날 해양은 세계경제를 견인하는 무역의 통로일 뿐만 아니라, 국가를 부강하게 하는 각종 자원의 보고이기도 하다. 최신과학기술의 발전으로 인류의 활동역시 육지에서 해양으로 점점 확대되고 있다. 근래 동아시아 국가들 역시 이러한 해양의 가치를 인식하고 해양에서의 자국의 권익을 경쟁적으로 추구하고 있다. 이로 인해 아시아 해역에 국가 간 분쟁이 고조되고 있다. 반면에 이러한 해양안보문제를 해결할 국제 안보조직이나 수단은 해결해야할 문제의 크기나 복잡성에 비해 대단히 부족하다. 이를 해결하기 위해서는 아시아 국가들이 냉정하게 현실을 직시하고 지혜를 모아 역내 해양안보문제의 범위와 의제들을 재점검해야 한다. 또한 그동안 시행되었던 제반 안보협력의 과정이나 결과도 재평가하여 현재의 해양안보문제를 효율적으로 관리하고 해결해 나가야 한다. 만약 우리가 이러한 문제들을 성공적으로 해결해 낸다면, 현재와 같이 불안한 아시아의 바다는 '평화와 번영의 바다'로 변화될 것이다.

• 문화기술의 융합
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• 제7권2호
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• pp.157-163
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• 2021

본 연구는 사이버범죄를 유발하는 개인의 심리적인 요인이 무엇인지 찾고자 하였다. 설문은 해킹 등 사이버 범죄유형 11가지에 대해 전·현직 수사관과 보안전문가를 대상으로 실시하였으며, 범죄를 유발하는 내부요인을 16가지로 선정하고 매슬로우 욕구 5단계에 따라 분류하였다. 총176개 항목에 대한 설문 조사결과 신뢰성을 나타내는 크롬바 알파 계수가 0.925로 신뢰성이 있었으며, 요인분석 결과 매슬로우 1단계 생리욕구는 상업성, 사익추구로, 2단계 안전욕구는 처벌인지부족과 군중심리로, 3단계 사회욕구는 충동성, 무관심, 사회성결여, 사회적마찰, 분노표시, 과대망상으로, 4단계 존경욕구는 익명성, 명예욕이며, 5단계 자아실현 욕구는 비인격성, 절제력부족, 도덕성결여, 매스컴영향으로 축소되었다. 결론적으로 사이버범죄를 유발하는 내부요인으로 「정보통신망 침해범죄」는 생리욕구, 존경욕구 순이며, 「정보통신망 이용범죄」는 생리욕구, 자아실현욕구순이며, 「불법콘텐츠범죄」는 자아실현욕구, 사회욕구 순이었다.