• Journal of Navigation and Port Research
• /
• v.33 no.10
• /
• pp.671-678
• /
• 2009

Recently, there have been some researches in the equipment fault detection based on shock and vibration information. Most research of them is based on shock and vibration monitoring to determine the equipment fault or not. Different with engine fault detection based on shock and vibration information we focus on detection of engine for boat and system control. First, it use the duplicated-checking method for shock and vibration information to determine the engine fault or not. If there is a fault happened, we use the integral to determine the error engine shock wave width and detect the fault area. On the other hand, we use the engine trend analysis and standard of safety engine to implement the shock and vibration information database. Our simulation results show that the probability of engine fault determination is 98% and the probability of engine fault detection is 72%

• Journal of Digital Convergence
• /
• v.18 no.3
• /
• pp.395-404
• /
• 2020

The purpose of this study is to analyze the research published in Korea on the live atrium of Toegye Lee Hwang and present its applicability as a health dance program.To this end, Korean academic journals, the Korean Institute of Information Scientists and Engineers, and DBpia searched Korean journal publications with the keyword 'active visit', and 24 articles published from 1974 to December 2018 were classified into the Korean Research Foundation.According to the criteria, they were classified and analyzed into subclasses. As a result, first, the research trends of academic disciplines by year tended to increase the participation of various academic disciplines in the atrium.The interests of the live atrium differed in the order of physical education.Second, in terms of research subjects, more researches attempted to identify active atria as a research topic than research suggesting a plan.Third, the trends of the research topics were in order to study academic definition of live atrium, to find out the relationship between live atrium and other disciplines, to propose ways to use them, and to develop programs.Fourth, by applying the live atrium to a dance program, we found the potential as a dance program for health promotion.It is expected that these findings will not only provide the basic data for the possibility of a health dance program integrated with various fields, but also contribute to the search for the direction of health dance program research.

• Journal of Korean Society of Transportation
• /
• v.31 no.6
• /
• pp.67-89
• /
• 2013

This study is to perform empirical analysis on observational before-after studies in Naive Method, Comparison Group(CG) Method and Empirical Bayes(EB) Method, and to compare with their results and to propose ways to apply to evaluation researches. For this purpose, the evaluation of road safety audit executed on Y$\breve{o}$ng-dong freeway in 2005 and 2006 was performed. As a result, all three methods have showed improved effects due to safety treatments. The safety effectiveness of Naive method is the largest, CG Method is the second and EB method is the last. The results of Naive method are overestimated due to the trend of reducing traffic accidents and those of CG method are affected by the external casual effects of comparison group. In the EB method, as "regression to the mean" phenomenon are controlled by reference group's accident model, it's result is relatively more accurate than that of other methods. In the conduct of evaluation studies, the analysts have to understand the pros and cons of each evaluation method. And after leading the survey on accident trends of related all sites, evaluation analysis is performed to be able to minimize bias.

• Journal of The Korean Association For Science Education
• /
• v.38 no.1
• /
• pp.87-96
• /
• 2018

In this study, the trend of research and practice of science education for students with special educational needs was discussed in consideration of the aim of science education. Since the 1980s 'science for all' has been suggested as an important goal of science education and it has been pursued in the National Curriculum of Korea with differentiated teaching and learning approach. The meaning of 'science for all' should be expanded to science education for all students including minorities. However, comparing to 'normal' students, there have been relatively little researches and practices for those who need special educational supports as to meet their special talents or as to meet their special mental or physical challenges. Especially, the efforts for handicapped students or students with special educational needs (SEN) have been deficient in comparison to that of talented or gifted students. In this study the authors introduced the history and procedures of a 'Science Fair of Hope' with SEN students as an example of practice of science education for all, and then described the change among pre-service science teachers' attitudes towards disability and inclusive education, so as to discuss the practice and significance of science education for all students including SEN students.

• The Journal of the Petrological Society of Korea
• /
• v.16 no.4
• /
• pp.217-232
• /
• 2007

The Puu Oo eruption in Hawaii since 1983 is one of the largest eruptions on Hawaii's volcanic history with prominent compositional variation ($5.6{\sim}10.1wt.%$ in MgO content). Although intense researches of Hawaiian eruption have been conducted for recent years, there is no up-to-date study on Puu Oo lavas that is erupting hot lavas today. in oder to obtain basic information on the geological characteristics of the eruption including any noticeable change in its petrological trend and magma dynamics, we applied several geological approaches such as field survey, systematic sampling, petrography, mineralogy, and geochemistry. Clinopyroxene and Plagioclase phenocrysts are rarely observed on the thin section, however Olivine crysts are much more obvious in the study area. It indicates that Puu Oo is early stage of magma differentiation. Variation diagram of whole rock composition shows that the elements such as $TiO_2,\;Al_2O_3,\;SiO_2$ and $Na_2O$ decrease with increasing MgO. In the trace element Sr, Y Zr and V versus $K_2O$, P18, P19 samples are plotted in primitive area. Variations of the Ni contents during $2003{\sim}2006$ may suggest a sudden change in magma composition probably caused by new magma injection.

• Journal of the Korean Geotechnical Society
• /
• v.27 no.11
• /
• pp.71-81
• /
• 2011

Adfreeze bond strength is a primary design parameter, which determines bearing capacity of pile foundation in frozen ground. It is reported that adfreeze bond strength is influenced by various affecting factors like freezing temperature, confining pressure, characteristics of pile surface, soil type, etc. However, several limited researches have been performed to obtain adfreeze bond strength, for past studies considered only few affecting factors such as freezing temperature and type of pile structures. Therefore, there exists a limitation of estimating the design parameter of pile foundation with various factors in frozen ground. In this study, artificial neural network algorithm was involved to predict adfreeze bond strength with various affecting factors. From past five studies, 137 data for various experimental conditions were collected. It was divided by 100 training data and 37 testing data in random manner. Based on the analysis result, it was found that it is necessary to consider various affecting factors for the prediction of adfreeze bond strength and the prediction with artificial neural network algorithm provides enough reliability. In addition, the result of parametric study showed that temperature and pile type are primary affecting factors for adfreeze bond strength. And it was also shown that vertical stress influences only certain temperature zone, and various soil types and loading speeds might cause the change of evolution trend for adfreeze bond strength.

• Journal of Korea Technology Innovation Society
• /
• v.16 no.4
• /
• pp.1109-1133
• /
• 2013

In an effort to discover new technologies and to forecast social changes of technologies, a number of technology life-cycle models have been developed and employed. The hype cycle, a graphical tool developed by a consulting firm, Gartner, is one of the most widely used models for the purpose and it is recognised as a practical one. However, more research is needed on theoretical frames, relations and empirical practices of the model. In this study, hype cycle comparisons in Korean and global search websites were performed by means of web-search traffic which is proposed as an empirical measurement of public expectation, analysed in a specific product or country in previous researches. First, search traffic and market share for new cars were compared in Korea and the U.S. with a view to identifying differences between the hype cycles in the two countries about the same product. The results show the similarity between the two countries with the statistical significance. Next, comparative analysis between search traffic and supply rate for several products in Korea was conducted to check out their patterns. According to the analysis, all the products seem to be at the "Peak of inflated expectations" in the hype cycles and they are similar to one another in the hype cycle. This study is of significance in aspects of expanding the scope of hype cycle analysis with web-search traffic because it introduced domestic web-search traffic analysis from Naver to analyse consumers' expectations in Korea by comparison with that from Google in other countries. In addition, this research can help to explain social phenomina more persuasively with search traffic and to give scientific objectivity to the hype cycle model. Furthermore, it can contribute to developing strategies of companies, such as marketing strategy.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.12 no.5
• /
• pp.2327-2331
• /
• 2011

The present paper relates to an analysis into patent applications by most exemplary patent-filing countries using time series analysis for a patented technology in which washing water in a water purifier is changed to magnetization hexagon water beneficial to human body, particularly the patented technology being to a magnetization hexagon water producing technology in which a magnetizer is mounted at an inlet pipe into which washing water is introduced to a water purifier, whereby the washing water is changed into magnetization hexagon water that is beneficial to human body for hygienic maintenance and use of bidet and toilet. In view of patent application trends in magnetization hexagon water producing technology fields, it can be easily noted from the analysis that a large portion of patent applications for the magnetization hexagon water producing technology comes from Korea and Japan, while USA and European countries are decreasing the number of patent applications and applicants. Therefore, there is a constant need of continuously observing the patent-filing trends in Korea and Japan in light of protection of patent rights in businesses that utilize the magnetization hexagon water. In view of the fact that many researches on and developments of products related to magnetization hexagon water are expected in the future, relevant producers and research institutes may effectively utilize the present paper in industrialization and patent research of the magnetization hexagon water.

• Journal of the Korean Society for Library and Information Science
• /
• v.54 no.1
• /
• pp.5-27
• /
• 2020

Many local governments in Korea have competitively shown great interests in establishing and operating public libraries and carried out various projects. With this, an increasing number of local governments have recently established and implemented medium- and long-term development plans for their public libraries, based mostly on the findings from researches committed to the outside experts. Cheongju City has formulated the First Medium- and Long-Term Development Plan for Public Libraries in Cheongju City (2012-2016) in 2011 and the Second Plan (2017-2021) in 2016. The goal of this study is to help accomplish the planned goals of the Second Plan by conducting an interim check on the current state of execution and content of the Second Plan. To reach the research goals, first, we identified the outcome and limitations of the First Plan, as previously carried out. Second, we analyzed the trend in the change of the cultural environments of public libraries in Cheongju City. Third and lastly, we reviewed the promotion strategy and operation outcome of the Second Plan. In particular, this study focused on the expansion of an organizational structure, the reinforcement of professional workforce, and the increase in budgetary support as the core elements required for developing public libraries in Cheongju City.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.30 no.3
• /
• pp.149-170
• /
• 2019

This study aimed at analyzing the 6 foreign reformed theological journals and index terms, authors to find out the intellectual structures and the characteristics of the journals, the authors. First, analyzing the index terms, we analyzed the main keywords and the increasing trend by period, second, analyzing the journals, we analyzed the main subject of them and the subjects of distinguishing features by the journals, third we analyzed the authors' profiling. The index terms were clustered four big clusters and 23 small clusters. The journals were clustered the two clusters, and we also analyzed the index terms to distinguish a journal from other journals. The authors were clustered the six clusters, the index terms the clusters of the authors shared were similar to the results of the two analyses. The biblical teachings of The Old Testament and the New Testament and reformed theology were core subject terms and it was consistent in the results of these three analyses. This study mainly aimed at analyzing the 6 foreign reformed theological journals, and we found out that the parts of the results of this study were similar to the results of analyzing the domestic reformed theological journals. Therefore, there should be more researches needed to figure out what the results of this study mean to Korean reformed theology.