• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.2
• /
• pp.885-892
• /
• 2012

Coastal zone management indicators are being used as an important means of decision making in the process of policy establishment for integrated coastal management and implementation, and these indicators are very useful tools that enable the evaluation of the coastal zone management from an integrated perspective, the understanding and analysis of interactions according to each department. Accordingly, most of organizations in international society and advanced coastal states tend to develop coastal zone management indicator system in order to check current coastal environment, social and economic status, also to grasp effectiveness of the coastal zone management policy. In this research, therefore, the characteristics of coastal zone management indicator system was drawn through understanding of strength and weakness, and conducting comparative analysis of the coastal zone management indicator system according to each level having classified domestic and international coastal zone management indicator system into three aspects at large: natural and environmental aspect; social and economic aspect; and network aspect. As a result, following features were drawn as the common characteristics among the cases in the advanced coastal states: the management means for realization of sustainable coastal zone management; scientific decision making tools for various stakeholders; evaluation means for effectiveness of coastal zone integrated management; and dualization of coastal zone management indicator system; etc. Lastly, based on these common values revealed in the domestic and international coastal management indicator system, a suggestion for correct establishment of the domestic coastal management indicators was proposed in the regional aspect.

• Journal of the Computational Structural Engineering Institute of Korea
• /
• v.28 no.2
• /
• pp.145-152
• /
• 2015

In the study, the effects of damping devices on damping ratio increase and wind-load reduction were investigated based on the computational platform, which is one of the parametric modeling methods. The computational platform helps the designers or engineers to evaluate the efficacy of the numerous alternative structural systems for irregular Super-Tall building, which is crucial in determining the capacity and the number of the supplemental damping devices for adding the required damping ratios to the building. The inherent damping ratio was estimated based on the related domestic and foreign researches conducted by using real wind-load records. Two types of damping devices were considered: One is inter-story installation type passive control devices and the other is mass type active control devices. The supplemental damping ratio due to the damping devices was calculated by means of equivalent static analysis using an equation suggested by FEMA. The optimal design of the damping devices was conducted by using the computational platform. The structural element quantity reduction effect resulting from the installation of the damping devices could be simply assessed by proposing a wind-load reduction factor, and the effectiveness of the proposed method was verified by a numerical example of a 455m high-rise building. The comparison between roof displacement and the story shear forces by the nonlinear time history analysis and the proposed method indicated that the proposed method could simply but approximately estimate the effects of the supplemental damping devices on the roof displacement and the member force reduction.

• Journal of Internet Computing and Services
• /
• v.10 no.3
• /
• pp.159-172
• /
• 2009

The purposes of this study were to identify factors affecting the quality of universities' e-learning contents from the perspectives of learners and to find out specific solutions for improving them. To achieve these goals, research questions were established as follows: 1) What factors were influencing the quality of universities' e-learning contents, and how were learners perceived about each factor(by its importance and satisfaction)? 2) Were there any differences on the learners' perceptions about each factor(by its importance and satisfaction)? 3) What were any specific ways to enhance the quality of universities' e-learning contents? The participants were of 543 university students who took at least one e-learning course and were living in the metropolitan areas(Seoul, Incheon, Gyeonggi). The survey questionnaire was consisted of 38 items developed through the literature review. To analyze the data collected, factor analysis and paired-sample t-test were conducted. The results were as follows: Five identified factors influencing the quality of universities' e-learning contents from the perspectives of learners were instructional strategies, learning contents, usability, evaluation/feedback, and interface design, and all identified factors were statistically significant differences among the learners' perceptions of its importance and satisfaction. The analysis results of importance-satisfaction matrix by each factor showed that 1) learning contents was the factor that current status should be at least continuously maintained, 2) usability, instructional strategies, and evaluation/feedback were the factors that learners' satisfactions still need to be increased although those importances were not relatively high, and 3) interface factor was important, while learners' satisfaction toward it was not much high so that solutions to increase the satisfaction need to be immediately considered. Based on the results, several suggestions to enhance universities' e-learning contents from the learners' perspectives were also recommended.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.45 no.6
• /
• pp.498-507
• /
• 2017

Electronic equipments comprised of high density components with various packaging types have been recently applied to a satellite. Therefore, to guarantee high reliability of electrical equipment, a design approach, which can reduce the development period and cost through an early diagnosis in potential risks of failure, should be established. In the previous research, the reliability assesment of the electronic equipments have based on Steinberg's fatigue failure theory. However, this theory was not enough for further investigation of life prediction and reliability of the electronic equipments comprised of various sizes and packaging types due to its theoretical limitations and analysis results sensitivity with regard to different modeling technic. In that case, if detailed finite element model is established, aforementioned problems can be readily solved. However, this approach might arise disadvantage of spending much time. In this paper, to establish strategy for high reliability design of electronic equipment, we performed mechanical reliability evaluation of CCB (Camera Controller Box) at qualification level based on the approach using Sherlock unlike design techniques applied to existing business.

• Journal of Engineering Education Research
• /
• v.16 no.6
• /
• pp.45-51
• /
• 2013

The purpose of this study is to explore the evaluation of transfer and elicit the implications regarding the improvement of educational curriculum, educational method, and educational environment. In order to do this, concepts of the transfer and related theories were explored. In terms of data collection method, the researchers conducted survey and semi-structured interview with 30 graduates who majored in Mechanical engineering by using the transfer tool developed by No and Park (2011). According to the result of the survey, a high average (4.27) between major subjects and one's current jobs was revealed. In addition to this, the participants' opportunity to apply what they learned from the college to transfer to their current job setting scored average of 4.10 and this score implies fairly high application of the transfer. In terms of the participants' extent to remember the liberal arts subjects, it scored average 2.90 which was fairly low. According to the survey about the curriculum, whether the major subjects as well as the liberal arts subjects were necessary for the transfer, the participants showed average score of 3.90. Concerning the item of whether the participants received lectures including practical problems, cases, or experiences in order to increase the transfer, the participants showed 2.63 which was fairly low. The followings are the results of the interview. First, regarding majors in educational curriculum, it was shown that educational curriculum were directly applied to the transfer. Especially, it was shown that involvement in the major-related activities and team projects played a positive role, thus, the involvement in such activities should be enforced. With respect to the improvements of the major, emphasizing the internship of the major-related subjects, courses centered on monitoring the latest programs and job recruiting trends, and information of professional engineers' tests were suggested for the improvements.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.11
• /
• pp.46-52
• /
• 2017

Along with the expansion of areas in which ICT and Internet of Things (IoT) devices are utilized, open source software has recently expanded its scope of applications to include computers, smart phones, and IoT devices. Hence, as the scope of open source software applications has varied, there have been increasing malicious attempts to attack the weaknesses of open source software. In order to address this issue, various secure coding programs have been developed. Nevertheless, numerous vulnerabilities are still left unhandled. This paper provides some methods to handle newly raised weaknesses based on the analysis of histories and patterns of previous open source vulnerabilities. Through this study, we have designed a weaknesses analysis system that utilizes weakness histories and pattern learning, and we tested the performance of the system by implementing a prototype model. For five vulnerability categories, the average vulnerability detection time was shortened by about 1.61 sec, and the average detection accuracy was improved by 44%. This paper can provide help for researchers studying the areas of weaknesses analysis and for developers utilizing secure coding for weaknesses analysis.

• Journal of Korea Technology Innovation Society
• /
• v.18 no.3
• /
• pp.416-443
• /
• 2015

The resource-based view (RBV) explains that the competitive advantage is mainly based on the resources which have strategic characteristics. Therefore, finding, developing and maintaining strategically valuable resources has been one of main research topics and a starting point in the corporate strategy structure in RBV. In this regards, attempts to recognize strategically valuable resources have been one of crucial issues in RBV researches. Especially, Barney's VRIO has been widely used as a practical tool for finding strategically valuable resources. However, empirical studies on VRIO framework's effectiveness have not been sufficiently implemented, and there has been no proven relation among the components of the VRIO so far. This is mainly because the concepts or definitions on core components of the VRIO - Value, Rareness, Inimitability, and Organization - are too comprehensively explained and measurements of each component cannot be easily quantified. Considering these, this paper presents empirical results of the relation between VRIO components and competitive advantage, and tests effectiveness of VRIO Framework with utilizing sufficient technology evaluation cases and financial statements of 2,252 technology based SMEs in Korea. As a result, the components of the VRIO have a positive influence on competitive advantage. The attributes of strategic resources - Value, Rareness, and Inimitability - have a statistically meaningful positive effect on organization, while organization has a positive effect on the competitive advantage serving as a parameter between the attributes of strategic resources and competitive advantage.

• Journal of the Korea Society of Computer and Information
• /
• v.17 no.7
• /
• pp.129-138
• /
• 2012

Despite of increasing pressure of opening to free for medical market by an advanced nation and increasing number of portal websites for health information, there have been few studies on the issues of enhancing the service quality of health information websites. The survey exhibited that the quality factors mainly affect significant and satisfied level of health information websites were usability, information structure and contents, interaction, and revisiting. This study was conducted to develop the consumer-focused quality factor of health information websites using WebQual model which was valued at efficient evaluation tool for this information system The methods taken in this research was to survey quality factors for significant and satisfied level of 323 consumers live in Chungcheong-do which is based on 48 questionnaires of WebQual quality factors. Our research extracted quality factors, usability, information quality (information structure and contents), interaction (personalisation and privacy) about view of criticality and satisfaction and relevant degree of revisiting. The research results presented in the paper will provide an efficient way of installing healthcare websites, moreover stone toward a marketing strategy for the consumer focus website provides under fierce competition.

• Korean Journal of Soil Science and Fertilizer
• /
• v.41 no.4
• /
• pp.235-238
• /
• 2008

The Water Erosion Prediction Project (WEPP) was initiated in August 1985 to develop new generation water erosion prediction technology for federal agencies involved in soil and water conservation and environmental planning and assessment. Developed by USDA-ARS as a replacement for empirical erosion prediction technologies, the WEPP model simulates many of the physical processes important in soil erosion, including infiltration, runoff, raindrop detachment, flow detachment, sediment transport, deposition, plant growth and residue decomposition. The WEPP included an extensive field experimental program conducted on cropland, rangeland, and disturbed forest sites to obtain data required to parameterize and test the model. A large team effort at numerous research locations, ARS laboratories, and cooperating land-grant universities was needed to develop this state-of-the-art simulation model. The WEPP model is used for hillslope applications or on small watersheds. Because it is physically based, the model has been successfully used in the evaluation of important natural resources issues throughout the United State and in several other countries. Recent model enhancements include a graphical Windows interface and integration of WEPP with GIS software. A combined wind and water erosion prediction system with easily accessible databases and a common interface is planned for the future.

• Journal of The Korean Association For Science Education
• /
• v.19 no.4
• /
• pp.622-634
• /
• 1999

We have investigated the 6th middle school science curriculum and its implementation based upon the results of middle school science teachers' and professors' ratings and self-reportings. The national-wide survey was administrated to obtain the data from 213 teachers of 112 middle schools and 43 professors of colleges of education. The survey items correspond to four stages of science curriculum. In the stage of the planned science curriculum, 'goals', 'framework of contents' and 'contents' are relevant to the basic guideline for curriculum revision, 'the more emphasis on inquiry activities'. However, the amount of contents is not appropriate, and 'methods' are difficult to attain. In the stage of the written science curriculum, 'goals', 'framework of contents', 'contents', 'methods' and 'evaluations' are not useful for teachers to teach science. In the stage of the implemented science curriculum, a small number of teachers use the issues of local community, organize the different group activities, develop assessment tools cooperatively, and conduct a lesson and a program considering students' diversities. This is partially because of the large amount of learning contents, the lack of materials and the weakness of supporting system. Finally, in the stage of the attained science curriculum, the students' achievements under the 6th curriculum is not higher than those under the other curricula.