• Journal of the Korea Institute of Construction Safety
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• v.2 no.2
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• pp.76-81
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• 2019

It becomes easy to acquire operating qualification of remote control tower crane and illegal retrofits is increased, remote control tower crane models are increasingly being used in smaller construction sites. However, as the problems caused by tower crane operators who have shortages of operating experience grow, safety accidents is increasing and worker is exposed to risk of accident. In this study, the cause of the accident was derived by analyzing the cause of the remote control tower crane accident. And then, the significance of accident causes was analyzed by AHP technique. The result of this study is that tower crane operators and construction workers do not comply with work rules.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.159-164
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• 2007

일상생활 속에 익숙하게 자리 잡은지 오래인 모바일 폰은 이미 고유의 기능인 음성통화와 문자메시지에 대한 서비스가 포화상태 이르러 새로운 수익 창출산업으로 무선인터넷서비스가 각광받고 있는 실정이나, 초기 사용자들에게 부정적인 기대 불일치 경험을 누적시켜 소극적인 사용이나, 사용회피를 유도하는 등 아직까진 기대 이하의 성적을 거두고 있는 실정이다. 예상을 뛰어넘는 과도한 요금에 놀라 이후 무선인터넷 사용을 꺼리게 된 경험이나, 청소년들의 무분별한 무선인터넷 사용에 따른 사고 등 폐해들에 대한 기사 등은 이미 낯설거나 놀라운 뉴스가 아니며, 이러한 직 간접경험들로 인해 아예 무선인터넷을 경험해보고자 시도조차 하지 않는 잠재고객 또한 많은 것이 사실이다. 본 논문에선 설문과 실험을 통해 현재 모바일 사용자들의 무선인터넷 서비스에 대한 기대, 사용 패턴, 만족도 및 바램과 요금체계에 대한 이해도 등을 조사하고, ‘불확실성 회피성향’이 사용회피에 미치는 역효과를 증명하여, 요금체계와 관련한 서비스업계의 개선 방향 제시에 연구목적을 가진다.

• Journal of Korean Society of Transportation
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• v.33 no.1
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• pp.100-111
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• 2015

After empirically investigating the vehicle accident risks by age groups, various programs and policies have been imposed to reduce the old's risks in other countries. In Korea, it is little known the risk level by age groups and no policy changes has been implemented even if the number of vehicle accidents occurred by the old has been rapidly rising while the total number of vehicle accidents has been decreasing. This study empirically investigates the vehicle accident risks by age groups and the results show that the old drivers over age 65 has the highest accident risk except for the young drivers below age 25. Thus, we emphasize the necessity of reinforcing the qualifications for reissuing the drive licence and programs for educating the old drivers in Korea which is facing the most rapid population aging in the world. On the other hand, various changes are needed reflecting the old drivers such as reforming the road signs, issuing a sticker and providing them incentives such that the old drivers use the public transportation instead of self-driving.

• Korean Journal of Construction Engineering and Management
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• v.22 no.1
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• pp.47-54
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• 2021

According to the Korea Occupational Safety and Health Agency's (KOSHA) report on industrial accident statistics over the past four years, the number of casualties at construction sites from 2017 to June 2020 was about 93,158 and the number of deaths was about 1,977, showing a high trend of safety accidents among the eight major occupational groups, with the construction industry ranking third in total and the death rate being the highest in total. Among them, the number of deaths caused by falls in the entire occupational category is about 1,267, the highest rate of deaths due to contact is about 522, which is a frequent safety accident among the top three accident types. This paper aims to help reduce the overall proportion of construction safety accidents by developing smart safety sensing devices using ultrasonic sensors to prevent two types of safety accidents, which have the highest rate of occurrence among various types of safety accidents occurring at construction sites.

• Korean Journal of Culture and Social Issue
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• v.13 no.4
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• pp.101-112
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• 2007

We investigated the influences of 'Circumstance Insensibility', 'Unsafe Driving', 'Incautious Driving', and 'Self-efficacy of Driving', consisting of driving confidence level, on traffic accidents. 1055 drivers conducted Driving Confidence Level Questionnaire, items about their dangerous driving experience and traffic accidents. Among them, after checking the missing items, we analyzed data of 998 drivers. As a result, we found the relation between driving confidence levels and traffic accidents. Specially, 'Circumstance Insensibility' and 'Unsafe Driving' influenced traffic accidents. However 'Circumstance Insensibility' had negative effects, the other side 'Unsafe Driving' had positive effects on traffic accidents. This result means each factor of driving confidence levels have different relation with traffic accidents. 'Incautious Driving' and 'Self-efficacy of Driving' didn't have any effects on traffic accidents in this research. In future, it should be investigated 'Incautious Driving' and 'Self-efficacy of Driving'.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.709-714
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• 2022

As the delivery service market continued to increase, the number of delivery workers also increased, but the corresponding safety education is insufficient. Therefore, this study is going to explore the importance of safety education by grasping the relationship between safety awareness, accident experience, and safety behavior of delivery workers. With the help of the delivery workers' online community site, this study conducted a survey on the status of delivery workers' safety education for a total of 114 delivery workers. As a result of the association analysis, more than half of the general agency workers said they did not receive safety training, and delivery workers who completed safety training were 2.36 times more frequent than delivery workers who did not complete safety training. In addition, through correlation analysis and simple regression analysis, safety education had a positive effect on safety perception of delivery workers, and there was a significant correlation between safety perception and safety behavior. Through these, the relationship between safety education and safety awareness, safety behavior, and the number of accident experiences was noticed, and it was concluded that safety education should be mandatory on all delivery platforms to prevent accidents.

• Journal of the Korean School Mathematics Society
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• v.11 no.1
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• pp.31-54
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• 2008

The discovery method is known to be the most effective in improving students' mathematical thinking. Recently, the long-term slow thinking(LST) is suggested as a possible method to implement the discovery method into the real classroom. In this concept, we examined whether students can solve such a problem, as appears to be beyond their ability, by themselves(LST) or not. 10 middle school students of the ninth grade were selected for the study, who had no previous experience on the infinite concept of calculus of the high school course. They had tried to solve a problem about the calculus by their LST for three days. Two of students solved the problem by themselves and seven of students solved it with help of hints. This result shows that if students are given the opportunity of LST for rather difficult mathematical problem with appropriate guidance of a teacher, they might solve it by themselves. That is, LST could be a possible method for implementation of the discovery method.

• Korean Journal of Environment and Ecology
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• v.28 no.5
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• pp.588-596
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• 2014

This study investigated the efficacy and drawbacks of a trekking accident prevention programs of the Jirisan National Park using visitor survey data. In total, 394 visitors were surveyed at the entrances to Seongsamjae, Jungsanri, Baekmudong, and Ssanggyesa trails on both weekdays and weekends. The trekking accident prevention training course has not been widely publicized. Only 23.4 % of the survey respondents have participated the training course. The training course itself appears to be useful in that 51.1 % of the course participants positively responded the contents of the course, suggesting that, if well publicized, the program can help prevent trekking accident. The trekking time regulation was relatively well publicized. Of the survey respondents, 72.4 % were aware of this regulation, and 72.2 % of them agreed on applying this regulation to other national parks. Accident vulnerability analysis shows that respondents who were aware of the regulation tend to be more experienced and skilled in trekking and more prepared for accident than those who were not. Also, respondents who were satisfied more on park safety facilities tend to be more experienced and skilled in trekking and more prepared for accident.

• Communications of Mathematical Education
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• v.34 no.3
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• pp.235-256
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• 2020

The purpose of this study was to investigate the experience of pre-service mathematics teachers who attended at a university course combined with teaching practicum based on design thinking process to identify the change of their awareness of its activities. For the research, 8 pre-service mathematics teachers participated in a mathematics major course, consisting of 5 phases of design thinking formed by Stanford d.school. In the end of the course, qualitative data were collected through individual and focus group interviews and the course activities. By data analysis, the results of this study were as follows. Firstly, the participants' perspectives of design thinking activities were changed from the difficulty and ambiguity of its activity in the beginning of the process to positiveness with competence of solving authentic problem in terms of teaching practicum over time. Secondly, the participating pre-service teachers emphasized that design thinking activities helped them prepare well teaching practicum and raise understanding of students they met in the school fields. Thirdly, some research participants went through the difficulty in utilizing their products drawn from 4th phase (prototyping) of design thinking process depending on the acceptance of their guidance teachers. Fourthly, the research participants also pointed out that the design thinking was a significant activity in that they learned how to understand and communicate with their students and how to collaborate with team members and it gave an insight about the preparation for a class. Through these results, this study identified the possibility of using the design thinking process for pre-service mathematics teachers' teaching practicum. In addition, the research put forward some implications for better use of design thinking in teacher education.

• Journal of the Korean association of regional geographers
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• v.20 no.2
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• pp.230-244
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• 2014

This study is to analyze the effects of geography class using taboo games on developing student's ability to think. After playing taboo games in which students explain keyword without using presented taboo words, worksheets of participants were analyzed with interviews to demonstrate what kind of thinking skills are working. The results of the analyses are as follows. First, while divergent thinking is applied to students who explain keyword in taboo games, convergent thinking is applied to students who listen to and guess them. Second, as groups play a role as explainer or answerer in turn, they can learn divergent and convergent thinking together. Third, students seem to improve high-order thinking ability like decision-making, critical thinking, metacogniton through taboo games. Fourth, students have a tendency to use a variety of direct and/or indirect experiences (especially, from media) as well as cross curricular knowledge in order to explain keyword without using taboo words.