• Journal of applied mathematics & informatics
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• v.2 no.1
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• pp.33-40
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• 1995

Entropy loss is derived by the scale parameter of Rayleigh distribution. Under this entropy loss we obtain the best invariant estimators and the Bayes estimators of the scale parameter. Also we compare MLE with the proposed estimators.

• Journal of The Korean Radiological Technologist Association
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• v.30 no.1
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• pp.28-35
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• 2004

Purpose : The purpose of this study is to compare the job satisfaction between regular radiologists and non-regular radiologists in general hospital and to research the factors of affecting job satisfaction. Materials and Methods : The subject is 120 radi

• Journal of Korea Trade
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• v.24 no.5
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• pp.71-86
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• 2020

Purpose - This study investigates research trends by searching for English keywords and abstracts in 1,511 Korean journal articles in the Korea Citation Index from the 2002-2019 period using the term "Port." The study aims to lay the foundation for a more balanced development of port research. Design/methodology - Using abstract and keyword data, we perform frequency analysis and word embedding (Word2vec). A t-SNE plot shows the main keywords extracted using the TextRank algorithm. To analyze which words were used in what context in our two nine-year subperiods (2002-2010 and 2010-2019), we use Scattertext and scaled F-scores. Findings - First, during the 18-year study period, port research has developed through the convergence of diverse academic fields, covering 102 subject areas and 219 journals. Second, our frequency analysis of 4,431 keywords in 1,511 papers shows that the words "Port" (60 times), "Port Competitiveness" (33 times), and "Port Authority" (29 times), among others, are attractive to most researchers. Third, a word embedding analysis identifies the words highly correlated with the top eight keywords and visually shows four different subject clusters in a t-SNE plot. Fourth, we use Scattertext to compare words used in the two research sub-periods. Originality/value - This study is the first to apply abstract and keyword analysis and various text mining techniques to Korean journal articles in port research and thus has important implications. Further in-depth studies should collect a greater variety of textual data and analyze and compare port studies from different countries.

• Transactions of the Korean Society of Automotive Engineers
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• v.6 no.5
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• pp.199-210
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• 1998

The skill that utilizes atomization of the liquid has been widely used in the field of industry and engineering. Though there are dozens of methods to make atomization, the pressure type injection nozzle is frequently used in washing of parts, pastourization and painting because it has relatively simple system. This study is to reveal the characteristics of atomizing formed by three different types of the pressure type injection nozzle. We measured velocity and diameter of droplet to compare and analyze characteristic of each nozzle. In case of velocity, atomization of hollow-cone nozzle is irregular than others and change of radial direction is especially large. Atomization of flat nozzle is nearly uniform. In case of diameter, atomization of hollow-cone nozzle is increased rapidly, as measurement point become more distant from the center of nozzle. Atomization of flat nozzle has the most fixed magnitude. Accordingly, full-cone nozzle can be used irrespective of the form of subject and hollow-cone nozzle is proper to the occasion to spray large and smooth subject. Also, flat nozzle is proper to the occasion to spray a part of subject and long groove.

• Korean Institute of Interior Design Journal
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• v.20 no.4
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• pp.101-108
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• 2011

When observing an object in a space, a part of it is remembered into our perception in the time for paying attention or conscious observation and it reaches to our visual understanding. In this study, it examined characteristics by each subject through the process of visual understanding by changes in such observation time. The results from this study are summarized as belows: First, through analysis of the observation data focused on the distance between the observed points, it was able to apply those visual theories organized before to the analysis of characteristics of the time for understanding by each subject. Second, there showed big differences in the time for visual understanding by each subject according to changes in the observation time so that it was found that there were big differences according to the characteristics of subject's intention or purpose of the observation of a space. Third, as the number of continuous observation gives an important clue in judgement of how well the space was understood, it was able to compare and organize the mutual characteristics of the time the attention was concentrated, the time observed intentionally and the time understood visually. Fourth, it was found that the shorter subjects gave the intentional observation in observing a space, the longer they spent the time for paying attention, while the less they could understand it visually.

• Speech Sciences
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• v.9 no.1
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• pp.89-110
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• 2002

Intonation is very difficult to describe and it is furthermore difficult to compare intonation between different languages because of their differences of intonation systems. This paper aims to compare some intonation phenomena between Korean, French and English. In this paper I will refer to ToBI (the Tone and Break Indices) which is a prosodic transcription model proposed originally by Pierrehumbert (1980) as a description tool. In the first part, I will summarize different ToBI systems, namely, K-ToBI (Korean ToBI), F-ToBI (French ToBI) and ToBI itself (English ToBI) in order to compare the differences of three languages within prosody. In the second part, I will analyze some tokens registered by Korean, French and American in different languages to show the difficulties of learning other languages and to find the prosodic cues to pronounce correctly other languages. The point of comparison in this study is the Accentual Phrase (AP) in Korean and in French and the intermediate phrase (ip) in English, which I will call ' subject phrase ' in this study for convenience.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.361-366
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• 2004

This study has carried out in order to furnish the fundamental material to systemize the lecture room into multimedia in the future, by locating college lecture room as the subject of study, by compare and analyze on acoustic character in both before and after of each improvement. Thereby, now we are about to compare and analyze on physical character of room acoustics in both common lecture room before improvement and the modified multimedia-lecture room after its improvement. Observing the conclusion obtained through experiment, reverberation time in the modified 'lecture room after improvement' became shorter compare with the 'lecture room before improvement', definition and RASTI also improved to be suitable to lecture, and considered that it is able to elevate the intimacy with studying and teaching efficiency, as well.

• Journal of the Korean Society of Costume
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• v.64 no.6
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• pp.16-32
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• 2014

This study aims to compare the current conditions of fashion education organizations in Korea and China. The results are as follows: 1. As for the departments related to fashion in Korea, the department of clothing was most frequently found in the fields of everyday science and natural science and design was most frequent in art related fields. 2. As for the departments related to fashion in China, the department of design was usually found in the fields of spinning and weaving, art, fashion, and others, and a college was dedicated to is having departments related to the fashion industry, much larger in scale compare to Korea. 3. Subject analysis found that both Korea and China put the most weight on the subject of design than any other fields. 4. Subject analysis of the fashion related departments in Korea found that all three department groups put considerable weight on clothing design and clothing composition subjects with other subjects having greater parts in the curriculum. 5. As for the departments related to fashion in China, design-related subjects were most frequently found, irrespective of the title of the fashion department, and the subjects concerning fashion marketing were widely distributed. 6. It seems that the curriculum for fashion colleges in China have been affected by the characteristics of the university before absorptive integration and setting based on the local characteristics rather than by the characteristics of the college. 7. For the curriculum of Korea, it is necessary to divide theoretical and practical ones and to develop practical subjects in association with experts in actual fields. China needs to take into account the local characteristics due to its global curriculum and large area.

• Journal of the Korean Society of School Health
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• v.17 no.2
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• pp.107-114
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• 2004

Purpose: This descriptive study was conducted to compare the teaching status, utilization of the teaching materials, and the need to solve matters of sex education between the school health educators and teachers working in an elementary school in Busan. Method: 182 school health educators and 125 teachers participated in the research. Data was collected using a self-administered questionnaire, and analyzed by frequency and x2 -test using the SPSS WIN 10.0 Program. Results: While school health educators carried out most of the sex education in the extra curriculum and physical education class, teachers did in the regular curriculum and physical education class. Regarding the utilization of the teaching materials on sex education, although the majority of school health educators used the teacher's manual, only a few teachers used it. Most of the school health educators used the ICT teaching materials while only half of the teachers did. Regarding the methods to solve matters on sex education, school health educators responded that a sex-related subject should be combined with a health subject, and an independent sex-related subject was necessary. The teachers, however, responded that it was necessary to secure enough time for sex education, the sex-related subject combined with a health subject was necessary, and there is a need to designate a sex educator. Conclusion: School health educators utilized more teaching materials for sex education and suggested more active methods to solve matters related to sex education. Therefore, school health educators should be more active as sex educators, and the subject of sex education should be adopted as a regular course.

• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.178-186
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• 2018

Subject classification of thesis units is essential to serve scholarly information deliverables. However, to date, there is a journal-based topic classification, and there are not many article-level subject classification services. In the case of academic papers among domestic works, subject classification can be a more important information because it can cover a larger area of service and can provide service by setting a range. However, the problem of classifying themes by field requires the hands of experts in various fields, and various methods of verification are needed to increase accuracy. In this paper, we try to classify topics using the unsupervised learning algorithm to find the correct answer in the unknown state and compare the results of the subject classification algorithms using the coherence and perplexity. The unsupervised learning algorithms are a well-known Hierarchical Dirichlet Process (HDP), Latent Dirichlet Allocation (LDA) and Latent Semantic Indexing (LSI) algorithm.