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( Bohyun Yun ),( Hyun-mi An ),( Won-bo Shim ),( Won-il Kim ),( Nguyen Bao Hung ),( Sanghyun Han ),( Hyun-ju Kim ),( Seungdon Lee ),( Se-ri Kim ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 Journal of microbiology and biotechnology Vol.27 No.12
This study was conducted to develop a screening method using Colilert-18 and a device for the detection of E. coli from agri-food production environments and fresh vegetables. The specificity and sensitivity of Colilert-18 by temperature (37°C and 44°C) were evaluated with 38 E. coli and 78 non-E. coli strains. The false-positive rate was 3.8% (3/78) and 0% (0/78) at 37°C and 44°C, respectively. The detection limit of E. coli at 37°C at <1.0 log CFU/250 ml was lower than that at 44°C. The efficiency of the developed device, which comprised an incubator equipped with a UV lamp to detect E. coli in the field, was evaluated by measuring the temperature and UV lamp brightness. The difference between the set temperature and actual temperature of the developed device was about 1.0°C. When applying the developed method and device to various samples, including utensils, gloves, irrigation water, seeds, and vegetables, there were no differences in detection rates of E. coli compared with the Korean Food Code method. For sanitary disposal of culture samples after experiments, the sterilization effect of sodium dichloroisocyanurate (NaDCC) tablets was assessed for use as a substitute for an autoclave. The addition of one tablet of NaDCC per 50 ml was sufficient to kill E. coli cultured in Colilert-18. These results show that the developed protocol and device can efficiently detect E. coli from agri-food production environments and vegetables.
Text Mining-Based Trend Analysis of United States Defense Standards
( Soohwan Chae ),( Bohyun Shim ),( Seongdon Hong ) 한국품질경영학회 2020 한국품질경영학회 학술대회 Vol.2020 No.-
The purpose of this study was to understand the trends of standards established in the United States, an advanced country in the field of defense, and to find points that can be applied to Korean defense standards. The titles of various United States defense documents including MIL-STD, MIL-HDBK, MIL-PRF, and MIL-DTL registered on the web were selected for analysis. A wordcloud was created after analyzing the frequency of words appearing in the title using text mining. It was possible to grasp the trend of words appearing in MIL-STD by era. Words that appear a lot due to the format of the document itself, words that appear a lot throughout the era, words that are used frequently in the past but are not used much in the present, and words that do not receive attention in the past but appear many in the present were identified. In addition, the characteristics of each document were derived through the wordcloud created for various defense documents. Korean defense standards also require consideration of safe use of materials and provision of various cargo transport standards. In addition, if the defense standard document system is clearly established and invested in efficient management, the quality of defense standards can be expected to improve.
텍스트 마이닝 기반의 미국 국방 표준 동향 분석을 통한 한국 국방 표준의 발전 방안 연구
채수환(Soohwan Chae),심보현(Bohyun Shim),염슬기(Seulki Yeom),홍성돈(Seongdon Hong) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.3
본 연구는 국방 분야 선진국인 미국의 표준에 대한 제정 동향을 파악하고, 한국 국방 표준에 적용 가능한 방안을 검토하였다. 이를 위해 웹에 등록된 MIL-STD를 비롯하여 다양한 미국 국방 문서에 대해 제목을 중심 데이터를 수집한 후, 텍스트 마이닝을 이용하여 단어 빈도를 분석하고 그 결과를 워드클라우드 형태로 생성하였다. 그 결과, 시대별로 MIL-STD에 등장하는 단어의 동향을 파악할 수 있었다. 문서 자체의 형식으로 인해 많이 등장하는 단어, 전 시대에 걸쳐 많이 등장하는 단어도 있는 반면, 과거에는 자주 쓰이다 현재는 많이 쓰이지 않는 단어나 과거에는 주목을 받지 못하다가 현재에 와서야 많이 등장하는 단어도 파악이 가능하였다. 또한 MIL-STD를 포함한 다양한 국방 문서를 대상으로 생성한 워드클라우드를 통해 그 특징을 도출하였다. 결론적으로 한국 국방 표준도 재료의 안전한 사용 및 다양한 화물 운반기준을 마련하는 것에 대한 고민이 필요한 것을 확인하였다. 더 나아가 국방 분야 표준 및 규격에 4차 산업혁명 등과 관련된 최신 기술을 반영하여 표준을 선점하고 규격을 마련하는 것이 중요할 것이다. 또한 국방표준 문서체계를 명확하게 정립하고 효율적인 관리에 투자한다면, 국방 분야 표준의 질 향상을 기대할 수 있을 것이다. This study examined the trend of standards established in the United States and to find points that can be applied to Korean defense standards. The titles of various United States defense standard documents registered on the web were selected for this research. The wordcloud was created after analyzing the frequency of words appearing in the title using text mining. The trend of words appearing in MIL-STD by era was obtained. This study identified words that appear often due to the format of the document itself, words that appear regularly throughout the era, words that are used frequently in the past but are not used much in the present, and words that did not receive attention in the past but appeared recurrently in the present. In addition, the characteristics of each document were derived through the wordcloud produced for various defense documents. In conclusion, Korean defense standards also require a consideration of safe and efficient management, transport, and load design of hazardous materials. Furthermore, the quality of defense standards can be expected to improve if the defense standard document system can be established, focusing on efficient management.