• Asia pacific journal of information systems
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• 제29권4호
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• pp.771-788
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• 2019

Deep learning techniques such as Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs) show superior performance in text classification than traditional approaches such as Support Vector Machines (SVMs) and Naïve Bayesian approaches. When using CNNs for text classification tasks, word embedding or character embedding is a step to transform words or characters to fixed size vectors before feeding them into convolutional layers. In this paper, we propose a parallel word-level and character-level embedding approach in CNNs for text classification. The proposed approach can capture word-level and character-level patterns concurrently in CNNs. To show the usefulness of proposed approach, we perform experiments with two English and three Korean text datasets. The experimental results show that character-level embedding works better in Korean and word-level embedding performs well in English. Also the experimental results reveal that the proposed approach provides better performance than traditional CNNs with word-level embedding or character-level embedding in both Korean and English documents. From more detail investigation, we find that the proposed approach tends to perform better when there is relatively small amount of data comparing to the traditional embedding approaches.

• 한국콘텐츠학회논문지
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• 제17권12호
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• pp.330-338
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• 2017

본 연구는 간호학 전공수업에 적용한 블렌디드 러닝이 간호학과 학생들의 학업성취도와 자기주도적 학습 능력에 미치는 효과를 규명하기 위한 비동등성 대조군 전후설계 실험연구이다. 연구대상은 J도에 소재한 4년제 간호학과 3학년 중 실험군 75명, 대조군 70명으로 총 145명이었다. 총 15주 동안 블렌디드 러닝을 실시하였으며 실시 전과 후에 자기주도적 학습능력을 측정하였고 중간고사, 기말고사를 통해 학업성취도를 측정하였다. 측정된 결과는 $x^2$-test와 Fisher's exact test, t-test, paired t-test로 분석하였다. 연구결과 블렌디드 러닝은 학습계획, 학습실행, 학습평가로 구성된 자기주도적 학습능력을 증진시켰고 기말고사에서 학습자의 학업성취도를 높여주었다. 그러므로 본 연구는 학습방법으로의 블렌디드 러닝이 학생들의 간호학 전공수업에 효과적임을 파악한 점에서 연구의 의의를 지니며, 향후 간호관련 전공학문 분야의 효과적인 교수법으로 확대적용 할 수 있을 것으로 기대한다.

• 대한간호학회지
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• 제30권1호
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• pp.110-121
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• 2000

This study was designed to develop the life moking cessation program with multidisciplinary approach using the Bandura's theory of self-efficacy and confirm the effect of it on the self-efficacy and smoking amount in college students. For this purpose non-equivalent control group, pretest-posttest design was used. The participating subjects in this study were 46 male college freshmen, 23 in experimental and 23 in control group. The experimental group received the 8 sessions of lecture and small group discussions for 4 weeks and a telephone coaching program for a period of 8 weeks. The control group received 5 sessions of lecture without further treatments. The data was collected from March 15 to June 11, 1999, and analysed by SAS/PC program with $\chi$$^2$test, simple t, paired t test. The results were as follows. 1. The score of self-efficacy was significantly increased over time in the experimental group than those of the control group. 2. The amount of urine cotinine was decreased over time in the experimental group, number of cigarettes smoked a day were significantly decreased, and they were significantly less than those of the control group. In conclusion it was found that the Life Smoking Cessation Program with Multidisciplinary Approach was an effective nursing intervention for increasing self efficacy and reducing the amount of smoking in male college students. Therefore, future smoking cessation programs should always consider the concept of self-efficacy and ways to positively reinforce it.

• Smart Structures and Systems
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• 제20권2호
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• pp.127-137
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• 2017

Identification of damping characteristics is of significant importance for dynamic response analysis and condition assessment of structural systems. Damping is associated with the behavior of the energy dissipation mechanism. Identification of damping ratios based on the sensitivity of dynamic responses and the model updating technique is investigated with numerical and experimental investigations. The effectiveness and performance of using the sensitivity-based model updating method and vibration monitoring data for damping ratios identification are investigated. Numerical studies on a three-dimensional truss bridge model are conducted to verify the effectiveness of the proposed approach. Measurement noise effect and the initial finite element modelling errors are considered. The results demonstrate that the damping ratio identification with the proposed approach is not sensitive to the noise effect but could be affected significantly by the modelling errors. Experimental studies on a steel planar frame structure are conducted. The robustness and performance of the proposed damping identification approach are investigated with real measured vibration data. The results demonstrate that the proposed approach has a decent and reliable performance to identify the damping ratios.

• 한국도로학회논문집
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• 제12권4호
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• pp.157-164
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• 2010

본 연구는 프리스트레스가 도입된 접속슬래브(Single-PTAS: Single Post-Tensioned Approach Slab)의 긴장력 도입에 따른 거동과 환경하중에 대한 거동을 분석하기 위하여 시험시공 현장에서 실험을 통해 수행되었다. 실험을 위해 온도측정센서를 슬래브의 깊이에 따라 장착하였으며, 변위측정게이지를 슬래브의 여러 위치에 설치하여 환경하중 및 긴장력 도입에 따른 슬래브의 변위 변화를 3차원적으로 측정하였다. 실험결과 접속슬래브는 길이가 짧아 긴장력 도입에 의한 급격한 종방향 변위 변화는 관찰되지 않았다. 접속슬래브의 깊이별 일일 온도변화는 깊이가 약 35cm보다 깊을 경우에는 거의 발생하지 않았으며, 수직온도구배는 접속슬래브의 두께가 큰 교대부근에서는 포장과 인접하는 부근에서 보다 작아졌다. 컬링 시 수직변위의 변화 양상 및 크기는 측정 지점의 수직온도구배와 직접적으로 관계가 있었다. Single-PTAS의 거동을 분석한 결과 콘크리트 포장 슬래브와 매우 유사한 거동을 보였으며, 따라서 차륜하중만을 고려하여 단순보로 설계하고 있는 접속슬래브에 포장체의 개념을 도입한 설계방안의 정립이 필요한 것으로 판단되었다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제42권
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• pp.11.1-11.8
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• 2020

Background: The purpose of this study is to compare the skeletal stability of two-jaw surgery via surgery-first approach with conventional two-jaw surgery in facial asymmetry patients by measuring the skeletal changes after surgery from a three-dimensional analysis. From January 2010 to January 2014, 40 patients with facial asymmetry who underwent two-jaw surgery in Pusan National University Hospital were included in this study. They were classified into experimental group (n = 20) who underwent two-jaw surgery via surgery-first approach and control group (n = 20) who underwent conventional two-jaw surgery. After selection of 24 landmarks and the construction of horizontal and sagittal, coronal reference planes, changes in 10 linear measurements and 2 angular measurements were compared between the surgery-first approach and conventional groups in the preoperative, immediate postoperative, and postoperative periods. The paired t test and Student t test were used for statistical analysis. The mean and standard deviation of the measurement were calculated for the experimental and control groups. Results: The statistical analysis showed that changes in skeletal measurements were similar between the surgery-first approach and conventional groups, according to each period. However, U1-SRP measurement showed statistically significant changes in surgery-first approach groups at postsurgical change (T1 to T2). Also, the mean treatment duration in the treatment group was 15.9 ± 5.48 months whereas that in the control group was 32.9 ± 14.05 months. Conclusion: In facial asymmetry patients, similar results were observed in the postoperative skeletal stability when 2-jaw surgery via surgery-first approach was compared with conventional 2-jaw surgery. However, significant lateral deviation of upper incisor midline was observed. In addition, a shorter average treatment duration was observed. To stabilize the unstable occlusion after surgery, increased wearing of the stent and proactive rubber guidance will be needed.

• 응용통계연구
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• 제4권2호
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• pp.195-207
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• 1991

1986년 Cook 이 발표한 Local Influence Approach란 방법을 이용하여 최적 실험계획법에서 일반적으로 가정하는 등분산가정에 대한 민감도 분석을 수행할 수 있는 진단방법을 연구하 였다. D-최적계획법의 갖고 있는 제약조건을 부분적으로 완화시킬 수 있는 방안을 모색하 여 몇가지 예들에 적용시켜 보았다. 결론 및 이 방법에 대한 향후 연구과제에 대한 토의를 마지막절에 첨부하였다.

• 한국문헌정보학회지
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• 제9권
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• pp.99-118
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• 1982

This paper first reviews various techniques proposed for automatic indexing with special emphasis placed on statistical techniques. Frequency-based statistical techniques are categorized into the following three approaches for further investigation on the basis of index term selection criteria: term frequency approach, document frequency approach, and probabilistic approach. In the experimental part of this study, Pao's technique based on the Goffman's transition region formula and Harter's 2-Poisson distribution model with a measure of the potential effectiveness of index term were tested. Experimental document collection consists of 30 agriculture-related documents written in Korean. Pao's technique did not yield good result presumably due to the difference in word usage between Korean and English. However, Harter's model holds some promise for Korean document indexing because the evaluation result from this experiment was similar to that of the Harter's.

• 수산해양교육연구
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• 제21권2호
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• pp.187-198
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• 2009

The purpose of this study was to develop the cultural approach counseling for school adjustment of adolescent. The subjects were 40 adolescents who had randomly assigned to an experimental group(20) and a control group(20). Subjects completed a school adjustment and a style of life. Data analyses were conducted using ANCOVA, ONEWAY of repeated measures. The results of the analyses revealed that subjects of experimental group showed significantly higher scores on style of life and school adjustment than ones of control group. Based upon the above results, it is concluded that the cultural approach counseling for school adjustment of adolescent was effective in improving adjustment of school of adolescent.

• 한국정밀공학회지
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• 제19권4호
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• pp.73-78
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• 2002

This paper presents a neural network approach to estimate the surface roughness by considering the relationship between the polishing operation parameters and the surface roughness. The neural network model predicts the post-machining surface roughness by using several factors such as pre-machining surface roughness, pressure, feed rate, spindle speed, and the number of polishing as inputs. In this paper, the several neural network models are implemented to estimate the surface roughness by using actual experimental data. The experimental results show that the neural network approach is more appropriate to represent the polishing characteristics of mold and die compared with the results obtained by the approach using exponential function.