• 한국IT서비스학회지
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• 제11권4호
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• pp.233-250
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• 2012

In this paper, credit card delinquency means the possibility of occurring bad debt within the certain near future from the normal accounts that have no debt and the problem is to predict, on the monthly basis, the occurrence of delinquency 3 months in advance. This prediction is typical binary classification problem but suffers from the issue of data imbalance that means the instances of target class is very few. For the effective prediction of bad debt occurrence, Support Vector Machine (SVM) with kernel trick is adopted using credit card usage and payment patterns as its inputs. SVM is widely accepted in the data mining society because of its prediction accuracy and no fear of overfitting. However, it is known that SVM has the limitation in its ability to processing the large-scale data. To resolve the difficulties in applying SVM to bad debt occurrence prediction, two stage clustering is suggested as an effective data reduction method and ensembles of SVM models are also adopted to mitigate the difficulty due to data imbalance intrinsic to the target problem of this paper. In the experiments with the real world data from one of the major domestic credit card companies, the suggested approach reveals the superior prediction accuracy to the traditional data mining approaches that use neural networks, decision trees or logistics regressions. SVM ensemble model learned from T2 training set shows the best prediction results among the alternatives considered and it is noteworthy that the performance of neural networks with T2 is better than that of SVM with T1. These results prove that the suggested approach is very effective for both SVM training and the classification problem of data imbalance.

• 디지털융복합연구
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• 제17권6호
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• pp.287-296
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• 2019

본 연구는 간호대학생을 대상으로 시뮬레이션 실습과 동영상 시청교육을 받은 경험에 관한 의미와 본질적인 구조를 파악하기 위해 시도된 질적 연구이다. 대상자는 이론적표본추출을 통해 6명을 선정하여 동전 던지기를 통해 3명씩 2팀으로 나눠 포커스그룹 면담을 진행하였다. 수집된 자료는 현상학적 방법 중 Colaizzi의 방법을 적용해 분석하였다. 연구결과 시뮬레이션실습은 3개의 범주(간호의 임상을 미리 경험해봄, 시뮬레이션 실습의 이로움, 시뮬레이션 실습의 한계)와 14개의 주제로 도출되었다. 동영상 시청교육은 3개의 범주(교육의 편리성, 교육효과 증대, 지식 전달의 부족)와 6개의 주제로 도출되었다. 결론적으로 시뮬레이션실습과 동영상 시청교육을 효과적으로 간호교육과정에 적용하기 위해서는 본 연구에서 도출된 결과를 반영하여 운영하기를 제언한다.

• Safety and Health at Work
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• 제10권1호
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• pp.95-102
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• 2019

Background: In a cluster-randomized trial, the Safety and Health Involvement For Truck drivers intervention produced statistically significant and medically meaningful weight loss at 6 months (-3.31 kg between-group difference). The current manuscript evaluates the relative impact of intervention components on study outcomes among participants in the intervention condition who reported for a post-intervention health assessment (n = 134) to encourage the adoption of effective tactics and inform future replications, tailoring, and enhancements. Methods: The Safety and Health Involvement For Truck drivers intervention was implemented in a Web-based computer and smartphone-accessible format and included a group weight loss competition and body weight and behavioral self-monitoring with feedback, computer-based training, and motivational interviewing. Indices were calculated to reflect engagement patterns for these components, and generalized linear models quantified predictive relationships between participation in intervention components and outcomes. Results: Participants who completed the full program-defined dose of the intervention had significantly greater weight loss than those who did not. Behavioral self-monitoring, computer-based training, and health coaching were significant predictors of dietary changes, whereas behavioral and body weight self-monitoring was the only significant predictor of changes in physical activity. Behavioral and body weight self-monitoring was the strongest predictor of weight loss. Conclusion: Web-based self-monitoring of body weight and health behaviors was a particularly impactful tactic in our mobile health intervention. Findings advance the science of behavior change in mobile health intervention delivery and inform the development of health programs for dispersed populations.

• 대한의용생체공학회:의공학회지
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• 제44권3호
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• pp.211-217
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• 2023

Recently, many studies have introduced artificial intelligence systems in the surgical process to reduce the incidence and mortality of complications in patients. Bleeding is a major cause of operative mortality and complications. However, there have been few studies conducted on detecting bleeding in surgical videos. To advance the development of deep learning models for detecting intraoperative hemorrhage, three models have been trained and compared; such as, YOLOv5, RetinaNet50, and RetinaNet101. We collected 1,016 bleeding images extracted from five surgical videos. The ground truths were labeled based on agreement from two specialists. To train and evaluate models, we divided the datasets into training data, validation data, and test data. For training, 812 images (80%) were selected from the dataset. Another 102 images (10%) were used for evaluation and the remaining 102 images (10%) were used as the evaluation data. The three main metrics used to evaluate performance are precision, recall, and false positive per image (FPPI). Based on the evaluation metrics, RetinaNet101 achieved the best detection results out of the three models (Precision rate of 0.99±0.01, Recall rate of 0.93±0.02, and FPPI of 0.01±0.01). The information on the bleeding detected in surgical videos can be quickly transmitted to the operating room, improving patient outcomes.

• 대한통합의학회지
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• 제12권3호
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• pp.93-100
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• 2024

Purpose : This study aims to review the physical therapy training programs in the United States, Canada, Taiwan, and Japan, and propose standardization plan for clinical practice in physical therapy education to advance the development of physical therapy education in South Korea. Methods : This study investigates the clinical practice standards in advanced countries such as the United States and Canada, and refers to the clinical practice standards in Taiwan and Japan, which are members of the association of world phyisotherapy and have economic, cultural, educational, and healthcare delivery systems, as well as legal systems, similar to those of South Korea. Results : In the United States, physical therapy education programs allocate an average of 22 weeks and 880 hours for clinical practice. Foreign-trained physical therapists who wish to take the licensure exam in the United States must have their educational programs reviewed and recognized as having completed at least 1,000 hours of clinical practice. In Canada, physical therapy education programs allocate an average of 31 weeks and 1,240 hours for clinical practice. Taiwan allocates over 1,440 hours of clinical practice in its educational programs, while Japan requires 800 hours of clinical practice as a legal prerequisite for the licensure exam. Conclusion : Based on the results of this study, the following standardization plan for clinical practice of the physical therapy education in South Korea are proposed. First, a minimum of 16 weeks and 640 hours of clinical practice is necessary to produce competent physical therapists. Second, university-based basic practical training should be at least 440 hours, with the introduction of a standardized accreditation system and unification of the four-year academic system. Third, the qualifications of physical therapists who supervise clinical practice in medical institutions should be clearly defined in the curriculum, and the standards for clinical practice instructors need to be expanded.

• 한국태양에너지학회 논문집
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• 제26권2호
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• pp.27-34
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• 2006

In this paper, a forecasting model of wind speed at Walryong Site, Jeju Island is presented, which has been developed and evaluated as a first step toward establishing Korea Forecasting Model of Wind Power Generation. The forecasting model is constructed based on neural network and is trained with wind speed data observed at Cosan Weather Station located near by Walryong Site. Due to short period of measurements at Walryong Site for training statistical model Gosan Weather Station's long-term data are substituted and then transplanted to Walryong Site by using Measure-Correlate-Predict technique. One to three-hour advance forecasting of wind speed show good agreements with the monitoring data of Walryong site with the correlation factors 0.96 and 0.88, respectively.

• 한국문헌정보학회지
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• 제47권1호
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• pp.377-398
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• 2013

본 연구는 인천지역아동센터의 초등, 중등학생을 대상으로 시행된 독서토론프로그램을 통하여 독서토론이 효과적으로 시행되기 위한 교육요소와 효과성요인을 조사 분석하였다. 독서토론 교육 요소는 읽기훈련, 쓰기훈련, 발표훈련, 듣기훈련, 생각정리훈련의 5가지이다. 분석결과 학생의 정서지능, 참여자들의 완독수준, 참여횟수, 수업참여자와의 공감도, 독서에 대한 사전 선호도가 효과요인으로 도출되었다. 그 외에 논제의 적합성, 진행자의 역량, 도서선정, 말하기, 글쓰기 등의 기초 교육 병행도 효과요인으로 고려되어야 한다.

• 한국재난정보학회 논문집
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• 제3권2호
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• pp.79-93
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• 2007

With international urgence of terror situation, many methods of terror techniques and skills are appearing and more intense and threatening terror is braking out not only in the air(plane), but also in the sea(ship). Korea is surrounded by 3 sides of sea and is a proud maritime nation that should advance to foreign country through the sea because South Korea and North Korea are confronting. Korea depend on the maritime transportation, 99.7% of exporting, importing material resources. Therefore, acquisition of the marine safety has the great affect on national security and economical life. On the high tension of situation about threat and possibility of maritime terroism, the potential ways of the improvement policy for counter-tactics against big maritime terror are the following. First, we should construct clear and well-organized network for accurate information about maritime terrorism Second, we should have the information of all domestic, foreign passenger's ships Third, national important facilities such as atomic energy plant, thermo-electric power plant, shipyard need policies to manage all emergency situation Fourth, government authorities should improve tactic abilitities by competing with support and budget inside of nation as well as outside of nation. To develop big maritime terror of our country, we will have to hold cooperative training & tactics contest of big maritime terror by cooperating educational industry organization with similar institute, improve the ability of members of big terror and acquire tactics information by excavating and exchanging a new technique through tactics seminar and public hearing.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2010년도 추계학술발표논문집 1부
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• pp.159-162
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• 2010

There are some limitations to advance technology glaring and luminous Intensity uniformity known as the weak point of existing LED lamp. To improve the two weak points, there have been no special alternative methods so far. Instead, one method which is being used such as the twisting secondary lens or arbitrary structure to remove glaring and improve luminous Intensity uniformity. Based on this academic background, it is necessary to be examined on Technology of Optical System to solve the two weak points by using not complicated but simple methods. This paper will examine the angle of reflection in order to improve luminous intensity uniformity. Also, this research will present the method using lighting analysis program to verify a hypothesis. Through the analysis program, we could understand the simulation analysis method and got some problems about the analysis result. After analysis of causes through reinterpretation of problems, we have reached a conclusion that was changed according to reflectivity and the shape of aspherics by main cause which effected luminous Intensity uniformity and glaring.

• 수산해양교육연구
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• 제25권4호
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• pp.757-765
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• 2013

The purpose of this study is to examine the effects of peer tutoring on students' achievement and learning satisfaction in a liberal computer class at university level. Traditional teaching method was applied for the control group consisting 55 students for 8 weeks. The experimental group containing 44 students was instructed using both traditional teaching method and peer tutoring. According to the results of diagnosed test, the experimental group was divided into heterogeneous ability group of 3 or 4. The tutor training was provided a week in advance of the class and the students played a role of a tutor and tutee by taking turns. The results showed no significant differences between the two groups on academic achievement; however, in terms of students' learning satisfaction, it displayed a wider range of results. The learning satisfaction data from the experimental group showed a much higher level than that of the control group. It is predicted that the amount of class hours of a week, the quality of the lecture and the application of peer tutoring affect the students' academic achievement. It is suggested that subsequent research on peer tutoring will allow for more in-depth study in this field.