한국농수산대학 신입생 자기소개서의 텍스트 마이닝과 연관규칙 분석 (2)

주진수,이소영,김종숙,신용광,박노복,Joo, J.S.,Lee, S.Y.,Kim, J.S.,Shin, Y.K.,Park, N.B. 국립한국농수산대학교 교육개발센터 2020 현장농업연구지 = Journal of practical agricultural resear Vol.22 No.2

본 연구는 2020년 한농대 입학생의 자소서에 서술된 학생들의 다양한 교내외 활동, 대학 지원 동기, 학업계획 및 향후 영농·영어계획 등의 텍스트 데이터를 대상으로 텍스트 마이닝에 의한 토픽 분석과 연관성 분석을 하였다. 텍스트 마이닝 결과에서 문항 3의 동아리 활동을 비롯한 다양한 활동 사례와 그 과정에서 배우고 느낀 점에 대한 키워드는 '친구' 빈도가 압도적으로 높았으며, '생각', '시간', '의견', '활동', '사람', '학교', '선생님', '학생', '동아리' 등의 키워드 순으로 많이 사용되었다. 문항 4의 대학 지원동기 및 졸업 후 진로계획에 대한 서술 데이터에는 '생각', '농업', '한농대', '농장', '지식', '공부', '사람', '관심', '전문', '아버지' 등의 키워드 빈도가 높게 나타났으며, 이 가운데 '아버지', '한농대', '전문', '농장' 등의 키워드는 다른 질문에 비하여 상위에 나타나는 특징을 보였다. 연관규칙 분석 결과에서 키워드 간 규칙의 발생 빈도이자 중요성을 나타내는 지지도는 문항 3에서 {친구} <=> {생각}, 문항 4에서 {생각} <=> {한국농수산대학} 규칙에서 가장 높게 나타났다. 두 단어 사이 연관성을 나타내는 신뢰도는 문항 3에서 {선생님} => {친구}, 문항 4에서 {농업, 한국농수산대학} => {생각}에서 높게 나타났다. 두 단어 간 밀접성을 나타내는 향상도는 문항 3에서 {친구} <=> {선생님}, 문항 4에서 {지식} <=> {전문}에서 높게 나타났다. 즉 두 단어는 우연히 함께 사용되지 않고 한 단어가 나타나면 뒤에 반드시 나머지 단어가 사용되었다는 것을 의미한다. 또한 키워드 간의 매개체 역할의 분석, 즉 키워드들 사이에 최단 경로를 파악하는 관계 중심성 분석과 연결 edge 수를 평가하는 연결 중심성 분석에서 문항 3은 '친구', '생각', '학교', '시간' 및 '사람', 문항 4는 '생각', '한국농수산대학', '지식' 및 '지원' 등의 키워드의 중심성이 매우 높은 결과를 나타냈다. In this study we examined the topic analysis and correlation analysis by text mining from the self introduction letter of freshman at Korea National College of Agriculture and Fisheries(KNCAF) in 2020. The analysis items of the 3rd question were and the 4th question were the motivation for applying to college, the academic plan and the career plan. The text mining to the 3rd question showed that the frequency of 'friends' was overwhelmingly high, followed by keywords such as 'thought', 'time', 'opinion', 'activity', and 'club'. In the 4th question, keyword frequency such as 'thought', 'agriculture', 'KNCAF', 'farm', 'father' was high. The result of association rules analysis for each question showed that the relationship with the highest support level, which means the frequency and importance of the rule, was the {friend} <=> {thought}, {thought} <=> {KNCAF}. The confidence level of a correlation between keywords was the highest in the rules of {teacher}=>{friend}, {agriculture, KNCAF}=>{thought}. Also the lift level that indicates the closeness of two words was the highest in the rules of {friend} <=> {teacher}, {knowledge} <=> {professional}. These keywords are found to play a very important roles in analyzing betweenness centrality and analyzing degree centrality between keywords. The results of frequency analysis and association analysis were visualized with word cloud and correlation graphs to make it easier to understand all the results.

스파크 음원을 이용한 KTX차량의 소음전파 예측에 관한 기초연구

주진수 대한건축학회 2006 대한건축학회논문집 Vol.22 No.3

한국농수산대학 재학생의 학교생활 감성 분석 및 영농의지에 관한 연구

주진수,이소영,김종숙,신용광,박노복,Joo, J.S.,Lee, S.Y.,Kim, J.S.,Shin, Y.K.,Park, N.B. 국립한국농수산대학교 교육개발센터 2019 현장농업연구지 = Journal of practical agricultural resear Vol.21 No.2

In this study we examined the preferences of college life factors for students at Korea National College of Agriculture and Fisheries(KNCAF). Analytical techniques of unstructured data used opinion mining and text mining techniques, and the results of text mining were visualized as word cloud. And those results were used for statistical analysis of the students' willingness to farm after graduation. The items of the favorable survey consisted of 10 items in 5 areas including university image, self-capacity, dormitory, education system, and future vision. After classifying the emotions of positive and negative in the collected questionnaire, a dictionary of positive and negative was created to evaluate the preference. The items of 'college image' at the time of university support, 'self after 10 years' after graduation, 'self-capacity' and 'present KNCAF' showed high positive emotion. On the other hand, positive emotion was low in the items of 'college dormitory', 'educational course', 'long-term field practice' and 'future of Korean agriculture'. In the cross-analysis of the difference in the will to farming according to gender, farming base, and entrance motivation, the will to farm according to gender and entrance motivation showed statistically significant results, but it was not significant in farming base. Also in binary logistic regression analysis on the will to farming, the statistically significant variable was found to be 'motivation for admission'

Polyaniline과 전도체 분말의 혼합물을 이용한 전자기과 차례 연구

주진수,이정엽,송형근,장관식,오웅주,김재욱 한국고분자학회 1998 한국고분자학회 학술대회 연구논문 초록집 Vol.1998 No.4

비정형 데이터 마이닝을 활용한 한국농수산대학 재학생의 학교생활 감성 분석(1)

주진수,이소영,김종숙,송천영,신용광,박노복,Joo, J.S.,Lee, S.Y.,Kim, J.S.,Song, C.Y.,Shin, Y.K.,Park, N.B. 국립한국농수산대학교 교육개발센터 2019 현장농업연구지 = Journal of practical agricultural resear Vol.21 No.1

In this study we examined the preferences of eight college living factors for students at Korea National College of Agriculture and Fisheries(KNCAF). Analytical techniques of unstructured data used opinion mining and text mining techniques, and the analysis results of text mining were visualized as word cloud. The college life factors included eight topics that were closely related to students: 'my present', 'my 10 years later', 'friendship', 'college festival', 'student restaurant', 'college dormitory', 'KNCAF', and 'long-term field practice'. In the text submitted by the students, we have established a dictionary of positive words and negative words to evaluate the preference by classifying the emotions of positive and negative. As a result, KNCAF students showed more than 85% positive emotions about the theme of 'student restaurant' and 'friendship'. But students' positive feelings about 'long-term field practice' and 'college dormitory' showed the lowest satisfaction rate of not exceeding 60%. The rest of the topics showed satisfaction of 69.3~74.2%. The gender differences showed that the positive emotions of male students were high in the topics of 'my present', 'my 10 years later', 'friendship', 'college dormitory' and 'long-term field practice'. And those of female were high in 'college festival', 'student restaurant' and 'KNCAF'. In addition, using text mining technique, the main words of positive and negative words were extracted, and word cloud was created to visualize the results.

한국농수산대학 신입생 자기소개서의 텍스트 마이닝과 연관규칙 분석 (1)

주진수,이소영,김종숙,신용광,박노복,Joo, J.S.,Lee, S.Y.,Kim, J.S.,Shin, Y.K.,Park, N.B. 국립한국농수산대학교 교육개발센터 2020 현장농업연구지 = Journal of practical agricultural resear Vol.22 No.1

본 연구는 2020년 한농대 입학생의 비정형 텍스트인 자소서에서 의미 있는 정보 혹은 규칙을 추출하기 위하여 고교 재학 중 '학업 및 학습경험'과 '교내 활동'을 기술한 두 개 문항에 대하여 텍스트 마이닝에 의한 토픽 분석과 연관성 분석을 하였다. 모집 전형을 구분하지 않은 텍스트 마이닝 분석 결과에서 '학업 및 학습 경험' 항목과 관련된 주요 키워드는 '공부', '생각', '노력', '문제', '친구' 등의 순으로 많이 나타났으며, '교내 활동' 항목과 관련된 주요 키워드는 '활동', '생각', '친구', '동아리', '학교' 등의 순으로 빈도가 높게 나타났다. 그러나 도시 인재 전형과 농수산 인재 전형 신입생들의 키워드 빈도 순위는 두 항목 모두 전형 특성에 따른 약간의 차이를 나타냈다. 빈도 분석에 결과는 빈도수 상위 50위까지의 키워드를 워드 클라우드로 시각화하여 키워드를 알기 쉽게 표현하였다. 연관 분석은 apriori() 함수를 사용하였으며 적정한 계산을 위하여 support(지지도)와 confidence(신뢰도)의 기준값을 항목별로 설정하였다. 먼저 '학업' 항목에 대한 연관 규칙은 46개를 추출하였으며, 그 가운데 {공부} => {생각}, {성적} => {공부} 및 {과목} => {공부} 등의 규칙에서 높은 연관성을 볼 수 있었다. 이 규칙을 바탕으로 매개체 역할의 키워드를 평가하는 관계 중심성 평가와 노드에 연결된 edge의 수에 따라 중요도를 파악하는 연결 중심성 평가에서는 '생각', '공부', '노력', '시간' 등의 키워드가 중심적인 역할을 하는 정보를 획득하였다. 다음으로 '교내 활동' 항목에서는 45개의 연관 규칙을 생성하여 {활동} => {생각}, {동아리} => {활동} 등의 규칙에서 높은 연관성을 볼 수 있었으며, 관계 중심성 평가와 연결 중심성 평가에서는 '생각', '활동', '학교', '시간', '친구' 등의 키워드가 중심 키워드라는 결과를 얻었다. 다음 연구에서는 자소서의 나머지 두 개의 문항 '배려·나눔·협력·갈등관리' 항목과 한농대 '지원동기와 향후 진로계획' 항목을 분석한다. 분석에는 '키워드의 빈도'에 '문서 빈도의 역수'를 곱하여 주로 다량의 문서에서 핵심어를 추출하는 TF-IDF(Term Frequency-Inverse Document Frequency) 분석을 추가한다. In this study we examined the topic analysis and correlation analysis by text mining to extract meaningful information or rules from the self introduction letter of freshman at Korea National College of Agriculture and Fisheries in 2020. The analysis items are described in items related to 'academic' and 'in-school activities' during high school. In the text mining results, the keywords of 'academic' items were 'study', 'thought', 'effort', 'problem', 'friend', and the key words of 'in-school activities' were 'activity', 'thought', 'friend', 'club', 'school' in order. As a result of the correlation analysis, the key words of 'thinking', 'studying', 'effort', and 'time' played a central role in the 'academic' item. And the key words of 'in-school activities' were 'thought', 'activity', 'school', 'time', and 'friend'. The results of frequency analysis and association analysis were visualized with word cloud and correlation graphs to make it easier to understand all the results. In the next study, TF-IDF(Term Frequency-Inverse Document Frequency) analysis using 'frequency of keywords' and 'reverse of document frequency' will be performed as a method of extracting key words from a large amount of documents.

복부 전산화 단층 촬영을 시행한 패혈증과 패혈성 쇼크 환자의 예후 예측 인자로서 하대정맥 직경비의 유용성

주진수,김양원,강지훈,윤유상 대한응급의학회 2017 大韓應急醫學會誌 Vol.28 No.4

Purpose: This study measured the availability of the ‘inferior vena cava (IVC) diameter ratio’ in sepsis or septic shock patients using computed tomography (CT) to determine if it can be used as a predictive factor for the 28-day mortality. Methods: This retrospective analysis included patients between March 2016 and February 2017. One hundred fortyeight sepsis patients and 62 septic shock patients were included. The patients were divided into 2 groups (28-day survivors and non-survivors). The IVC diameter ratio (maximal transverse-to-maximal anteroposterior diameter immediately below the level of the renal vein) was measured by abdominal CT in the axial view. Using SPSS Statistics ver. 20.0, the IVC diameter ratio was analyzed by logistic regression analysis to identify the predictors of the 28-day mortality. Receiver operating characteristics (ROC) curves were used to determine the cut-off value for the maximum sensitivity and specificity for an evaluation of the availability as a predictive factor (28-day mortality). Results: In the sepsis group, 38 out of 148 patients (25.7%) died. In the septic shock group, 29 out of 62 patients (46.8%) died. The IVC diameter ratio was significantly higher in the non-survivors than the survivors in both the sepsis and septic shock groups. In the sepsis patients, the odds ratio was 8.95. The area under the ROC curve (AUC) of the IVC diameter ratio for the 28-day survival was 0.817; the cut-off value was 1.60:1. The sensitivity and specificity was 73.7% and 75.5%, respectively. The positive and negative predictive value was 50.9% and 89.2%, respectively. In the septic shock patients, the odds ratio was 39.99. The AUC of the IVC diameter ratio for the 28-day survival was 0.831; the cut-off value, sensitivity, and specificity was 1.90:1, 75.9%, and 81.8%, respectively. The positive and negative predictive values were 78.6% and 79.4% respectively. Conclusion: The IVC diameter ratio (maximal transverse-to-maximal anteroposterior diameter) is associated with the 28- day mortality in sepsis or septic shock patients who have undergone abdomen CT.

교회 건축물의 실내음향 특성에 관한 연구

주진수 한국소음진동공학회 1999 소음 진동 Vol.9 No.4

In a church, speech intelligibility is very important together with the reverberance for musical activities. In order to obtain the primary data of a acoustical design for churches records were refereed and churches were measured in Europe and Japan. And in the base of measurements, those were judged by subjective hearing test. As some results, it has been found that the room acoustics of churches were different in a country and the reverberation time was perferred two seconds for speech intelligibility. However, although personal deviations were admitted, more long echoes were preferred for the music.

Modification Study of a Conducting Polymer Nanowire through Electron-Beam Irradiation

주진수,홍영기,박동혁,박성규 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5

We synthesized conducting poly (3,4-ethylenedioxythiophene) (PEDOT) nanowires by using an electrochemical polymerization method with an alumina (Al2O3) nanoporous template. An electron (E)-beam through a linear electron accelerator was irradiated onto the PEDOT nanowires with the Al2O3 template. After E-beam irradiation, the Al2O3 template was removed by using a hydro uoric acid solvent; then, an isolated single strand of PEDOT nanowires was obtained. To discern the structural and the conformational changes in the E-beam-irradiated PEDOT nanowires, we performed Raman and ultraviolet and visible absorption spectra on the nanowires. In order to study the electrical properties of the E-beam-irradiated PEDOT nanowires, we measured and analyzed the current-voltage characteristics of the pristine and the E-beam-irradiated PEDOT nanowires. We synthesized conducting poly (3,4-ethylenedioxythiophene) (PEDOT) nanowires by using an electrochemical polymerization method with an alumina (Al2O3) nanoporous template. An electron (E)-beam through a linear electron accelerator was irradiated onto the PEDOT nanowires with the Al2O3 template. After E-beam irradiation, the Al2O3 template was removed by using a hydro uoric acid solvent; then, an isolated single strand of PEDOT nanowires was obtained. To discern the structural and the conformational changes in the E-beam-irradiated PEDOT nanowires, we performed Raman and ultraviolet and visible absorption spectra on the nanowires. In order to study the electrical properties of the E-beam-irradiated PEDOT nanowires, we measured and analyzed the current-voltage characteristics of the pristine and the E-beam-irradiated PEDOT nanowires.

기관삽관에 의한 빈맥과 혈압상승을 막기위한 Esmolol 의 적정용량

주진수,임재빈,강기철 대한마취과학회 1998 Korean Journal of Anesthesiology Vol.34 No.3

Background: Esmolol has been recommended to prevent tachycardia and hypertension induced by tracheal intubation in several studies, but these studies are based on mean values of changes of vital signs. Therefore, the recommended doses are not guaranteed to be precise effective dose. Methods : According to esmolol dose, 140 patients were randomly allocated to 7 groups of 20 patients. After intravenous thiopental and vecuronium followed by mask ventilation of 3 minutes with enflurane, nitrous oxide and oxygen, one of the dosages of esmolol 0, 0.2, 0.3, 0.45, 0.5, 0.6, 0.8 or 1.0 mg/kg was administered. Ninty seconds later, tracheal intubation by direct laryngoscopy was performed. After then heart rate was monitored continuously and blood pressure was measured 5 times at intervals of 1 minute. The highest heart rate and systolic blood pressure were recorded. If the highest heart rate was beyond 100/min or highest systolic blood pressure was beyond 170 mmHg, we regarded this cases as 'unprotected' case. By logistic regression, we calculated the doses of esmolol which reduce the incidence of tachycardia, systolic hypertension and unprotection below 5% respectively. Results : The appropriate doses of esmolol for prevention of tachycardia, systolic hypertension and 'unprotection' were 0.95 mg (95% CI: 0.77∼1.33 mg), 0.38 mg (95% CI: 0.21∼1.05 mg) and 0.93 mg (95% CI: 0.78∼1.23 mg) respectively. Conclusions: In anesthetic induction and tracheal intubation with thiopental and vecuronium, esmolol 0.78∼1.23 mg/kg was appropriate for preventiion of tachycardia ( > 100 bpm) and systolic hypertension ( > 170 mmHg). (Korean J Anesthesiol 1998; 34: 526∼530)