• Korean Journal of Construction Engineering and Management
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• v.14 no.2
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• pp.56-64
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• 2013

New construction technologies, especially automated equipment, are rarely deployed on a construction site where many accidents and claims occur. This study analyzed and derived impact factors for technology adoption to improve the chance of adopting automated construction equipment to the field. First, impact factors were classified into functional and non-functional factors. Then the functional factors were divided into usability and functionality factors, and the non-functional factors into cost, construction property, and organization factors. Next, the importance and realization possibility of each impact factor were analyzed through a survey with experts. Usability and functionality were analyzed to have the highest importance and realization possibility. Lastly, the differences between construction companies and equipment development companies in the importance and realization possibility of each factor were analyzed. Construction companies recognized previous relationship, operator's attitude, members' will, and construction quality more important than equipment development companies.. The equipment development companies should consider these differences between the view of construction companies and that of equipment development companies on the impact factors. The result of this study can be used as a basis for evaluating for automated construction equipment in the preliminary development phase.

• Journal of Digital Contents Society
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• v.2 no.1
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• pp.1-7
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• 2001

The authoring systems for digital contents using multimedia technologies ate requested in many fields such as education, medical science, entertainment market e-commerce and etc. Especially, the emergence of cyber universities and the rapid expansion of on-line education market require the effective contents authoring systems, which have various functions to generate the qualified contents. Therefore, many systems arc developed and currently used. However, since the developed systems considered only the developer's convenience, the generated digital contents by using these systems are failed to draw tile users'(or learners') active interaction with contents. That is, since the users just watch the contents like watching a drama or a film, it causes many problems in delivering the contents effectively or in evaluating the users. This paper presents, develops, and implements the new contents authoring system by using programing languages and/or software tools. The presented, developed, and implemented system mimics the face-to-face education in off-line system, induces the users' active interaction with contents, and continuous evaluation to the users.

• Journal of Korean Philosophical Society
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• v.148
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• pp.129-156
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• 2018

Recently, a lot of articles and writings defending animal right and welfare are introduced into our society. For example, P. Singer's Animal Liberation, T. Regan's The Case for Animal Rights, and J. Rachels's Created From Animal are representative writings of animal ethics. In his books, P. Singer maintains that all animals are equal. T. Regan insisted that animals as a subject of a life have rights. J. Rachels's moral individualism is that how an individual may be treated is to be determined, not by considering his group membership, but by considering his own particular characteristics. Interestingly, they use common argument called 'argument from marginal cases' to justify their theoretical positions. If we can disclose the weakness of the argument, all kinds of animal ethics which defend animal right and welfare such as animal liberation theory, animal rights theory and moral individualism will collapse. In this paper, I will examine the concrete contexts in which Singer, Regan and Rachels make use of the argument. And I will critically examine the argument. Lastly I will show that the attempt to deny the difference of species is unsuccessful.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.7 no.3
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• pp.41-52
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• 1997

In this paper, we analyze two claws of Zhou-Gollmann's protocol. The protocol divide the message into a key K and a ciphertext C. The ciphertext C is delivered to the recipient, but the key K is submitted to the TTP, after the message originator receive the recipient's receipt for the ciphertext. TTP puts the key in the directory which is accesaible to the public. So, the recipient's obtaining the message dependson whether the originator submits the key or not. We will show that the originator. which is in such an advantageous position, could make the protocol be unfair and present how to improve the protocol. On the other hand, Zhou-Gollmann's protocol doesn't provide the secrecy of the message, since the key K is published. This means that, to send a secret message, additional mechanism is required. In this paper, we will present an improvement of Zhou-Gollmann's protocol to keep the message secret. The key distribution of the proposed protocol is based on the Diffie-Hellman's one.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.80-87
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• 2022

Most of the disaster relief items provided to sufferers and temporary evacuees that are supposed to be victims in Korea are not suitable for the shelter environment of temporary housing facilities, and are not satisfactory because they do not have the functions, proper size and types. The purpose of this study is to analyze the user needs of emergency rescue relief items by presenting problems about the use environment and to develop the variable air mattresses which are based on disaster prevention design. In order to secure objectivity such as usability, convenience, and durability, research data are limited. However, the difficulty of mass spreading of conventional fiber mat and the functional disadvantages of foam plastic mat are solved by adopting variable air mattresses. The variable air mattresses are expected to help rehabilitate people by helping victims of physical tiredness, illness worsening, poor sleep, and life instability that can happen during long-term shelter life.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.423-423
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• 2021

국내에서는 '물손실(누수)을 얼마나 잘 관리하고 있는지' 평가하는 물손실관리 수행능 지표를 '유수율(누수율)' 로 판단하고 있다. 하지만, 유수율은 실제 관리자의 의지와 무관한 인자에 영향을 받을 수 있으며, 지역의 여건상 유수율이 높게 나올 수밖에 없는 지역이 있는가 하면 반대로 지역의 여건 상 유수율이 낮게 나올 수밖에 없는 지역이 있다. 따라서 유수율만을 이용하여 물손실관리 수행능력을 평가하는 지표로는 미흡함이 있는 것으로 판단될 뿐만 아니라 IWA에서는 전통적인 백분율을 이용한 지표(손실율, 유수율, 무수율 등)의 문제를 언급하면서 수자원의 효율적인 사용 혹은 상수도사업의 경제성을 나타내는 목적 외에는 사용하지 말아야 한다고 권고하였다. 현재까지의 연구를 보면, 국내 실정에 맞는 다양한 물손실관리 수행능 지표들이 언급되면서 이에 대한 적합성 및 적용성에 대한 많은 연구들이 진행되어 왔다. 기존의 연구들은 지자체 단위로 물손실관리 수행능 지표에 대한 연구를 진행하였다면, 본 연구에서는 소블럭 단위로 수도통계자료를 분석하여 물손실관리를 위한 어떠한 지표를 이용하는 것이 타당한 방법인지 제시하고자 하였다. 비교분석을 하기 위한 지표인 소블럭별 유수율, 실손실율(누수율), 1인당 실손실량, 급수전당 실손실량, 누수평가지표(ILI)를 산정하고, 그 결과에 따라 소블럭별 순위를 결정하였다. 유수율과 급수인구를 고려한 1인당 실손실량과의 비교분석에서 높은 R² (결정계수)값과 소블럭별 순위변동 폭이 적은 것으로 나타났으나, 유수율과 급수전수를 고려한 급수전당 실손실량 및 배수관의 연장과 급수전수, 평균압력을 고려한 누수평가지표와의 비교분석에서는 낮은 R²값과 소블럭별 순위 변동폭이 큰 것으로 나타났다. 앞서 언급한 것처럼, 유수율만을 이용하여 물손실관리 수행능을 설명하기에는 부족할 것으로 판단되며, 유수율 외에도 다양한 지표들을 종합적으로 고려했을 때 가장 바람직한 물손실관리 수행능 평가가 될 것으로 사료된다.

• Journal of Internet Computing and Services
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• v.16 no.3
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• pp.95-104
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• 2015

In recent years, in accordance with the rapidly increasing number of smartphone users, various social problems have started to occur. Examples of these problems are the overuse of smartphones and bad usage habits of smartphone users that can cause new social problems such as smartphone addiction and other smartphone related diseases. With the aim of preventing these social problems, this paper proposes a new smartphone addiction and disease prevention system. This system was developed by collecting and analyzing smartphone usage patterns. This proposed system analyzes the usage patterns and working hours of smartphone users in real time. If the detected smartphone usage patterns reach a dangerous level, the system will send warning messages to the user. This will enable users to recognize the unhealthy situation in advance by themselves. In addition, this solution could possibly prevent smartphone addiction and other smartphone related illness by preventing overuse and encouraging abstinence from using smartphones to the extent that it becomes harmful to the user.

• Journal of dental hygiene science
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• v.11 no.5
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• pp.389-395
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• 2011

The purpose of this study was to examine dental hygiene students' achievement motivation and factors affecting dental hygiene students' achievement motivation by the general characteristics of subjects in this study. The subjects in this study were 450 who were selected by convenience sampling from three different three-year-course colleges. After a survey was conducted, the answer sheets from 421 respondents were analyzed. The collected data were analyzed, which made use of t-test, ANOVA and Kruscal-Wallis test. The findings of the study were as follows. 1. The dental hygiene students investigated got 3.34 in achievement motivation. They got the highest score of 3.78 in the item 'I perform what I have to do with a sense of responsibility.' and they got the lowest score of 2.67 in the item 'I like to do something risky.' 2. Concerning links between their general characteristics and achievement motivation, the students whose academic year was higher(p<0.001) and who had more clinical practice experiences (p<0.01) were better motivated than their counterparts. As to connections between achievement motivation and expected post-graduation length of service, those who replied that they planned to find another job after getting married were better motivated(p<0.05). Regarding relationship between achievement motivation and a will to work abroad, the students who had a stronger will to work abroad were better motivated. 3. As a result of checking the influence of their general characteristics on achievement motivation, stronger motivation was found among the students whose academic year was higher(p<0.01), who intended to work until marriage(p<0.01) and who didn't plan to keep working after marriage(p<0.05) when the other variables were controlled. Therefore dental hygiene students should be taught to look at things positively when they enter college, and they should also be educated to become progressive to keep working for their lifetime instead of just getting a temporary job after graduation.

• Journal of The Korean Association For Science Education
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• v.26 no.7
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• pp.813-825
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• 2006

The purpose of this study was to identify students' conceptions and their conceptualization traits in terms of the explanation of subjects: human, animals, and plants. A questionnaire was specially developed to make sure students' conceptions of evolution, students' explanation patterns with the five evolutionary explanations: creationism, internal will explanation, theological explanations, use and disuse explanation and natural selection after mutation and perceived ideas of evolution in terms of the genetic characters of human, animals and plants. 1,540 elementary, middle and high school students participated in responding to the questions. The data was collected and analyzed cross-sectionally by age. Results showed that students' evolutionary explanations were different among each subject: human, animals and plants. Students had concentrated with more 'theological explanations' than 'internal will explanation' and 'use and disuse explanation' about plant evolution. 'Natural selection after mutation explanation' was less represented in explaining human characters. This result showed that the anthropocentric thoughts had influenced students' evolution conceptions. Accordingly, as student's age, 'theological explanation' and 'internal will explanation' became least used in explaining the theory of creation. 'Use and disuse explanation' attained more representation in their explanation. In addition, the diversity of students' evolutionary explanations was getting less attention as age increases. Among youngers, 'theological explanation', 'internal will explanation' and 'use and disuse explanation' showed an even number of responses. The elders responded with more 'use and disuse explanation'. This result let us infer that 'use and disuse explanation' was strongly adhered to by student cognitive structures. Many students recognized that evolution was a kind of scientific hypothesis with little evidence. They have had a little interest in evolution and conceptualized it through informal educational sources. This study mentions that to teach evolution more effectively, teachers should make 'use and disuse explanation' adhere strongly to students' cognitive structure.

• The Journal of the Korea Contents Association
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• v.18 no.9
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• pp.178-198
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• 2018

This study examines the effects of transformational leadership on helping behavior for the secretary workers. We also demonstrate comprehensively the moderating effects of job resources(LMX) and job demands(utilization of mobile devices after work) on the relationship between transformational leadership and helping behavior. The results of this study targeted 140 incumbent secretaries are as follows: First, transformational leadership has a significant positive effect on the helping behaviors of members. Second, the interaction effect of LMX(synergistic effect) was verified in the positive relationship between transformational leadership and helping behavior. Finally, interaction effects of utilization of mobile devices after work(buffering effect) were confirmed in the relationship between transformational leadership and helping behavior. The results of this study are that transformational leadership of middle managers is important to strengthen worker's helping behavior, but it is also important to understand the contextual factors such as social support(LMX) and work environment(utilization of mobile devices after work) that affect the will and autonomy of members in accepting leadership. Finally, we suggest the theoretical and practical implications of this study, present limitations and future research directions.