• Journal of the Korean Chemical Society
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• v.66 no.1
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• pp.31-41
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• 2022

The purpose of this study is to draw implications for future Korean science education by analyzing the PISA 2015 science teacher questionnaire. To this end, descriptive statistics and difference tests were conducted for each questionnaire item, using raw data from science teacher surveys in Korea, the United States, and China. As a result of the analysis, first, the perception that Korean science teachers should participate in professional development activities was lower than that of comparative countries, and it was found that improvement was needed in the practice of adaptive instruction and various evaluation methods. Second, although Korean science teachers were generally satisfied with their jobs, the response that they were hindered in science education activities due to limitations in various resources at their current school was relatively higher than that of comparative countries. Third, scientific inquiry was less emphasized in science curriculum and science class in Korea, and self-efficacy in inquiry teaching process was relatively low. Fourth, in Korea, it was found that there were fewer classes for discussion and using ICT in science classes.

• The Journal of the Korea Contents Association
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• v.11 no.7
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• pp.153-167
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• 2011

This paper critically examines the evolution of Nam June Paik's self-contradictory art philosophy. While the existing literature tends to slight it, Paik's works of arts remain fraught with contradictions: Paik has proved prima facie avant-garde an artist; however, as the scale and form of his works have developed, the prophetic, path-breaking philosophical underpinnings of his arts evolved to become more conformist. The present paper aims to shed light on the understudied and underappreciated side of Paik's accomplishments in order to come to a fuller understanding and appreciation of his arts and his legacy.

• Journal of the Korean Data and Information Science Society
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• v.21 no.4
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• pp.699-708
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• 2010

Korean universities have selected candidates through admission officer system since 2009. However, the universities now have to settle several problems that they faced at the first stage of the system. Therefore, this research, taking the admission screening data of J University as examples, aims to discuss how differently the weight of the screening factors appears depending on the subjects related to college entrance, such as parents, teachers, and admission officers. The research indicates that the subjects have different perspectives about entrance screening requisites. Parents and teachers more value the student record that is a countable indicator than the letter of self-recommendation that is a uncountable indicator. However, it also indicates that admission officers take attitude against parents and teachers.

• Journal of the Korea Convergence Society
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• v.12 no.12
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• pp.49-57
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• 2021

With the advent of the era of the fourth industry, more and more scientific techniques are being used to solve decision-making problems. In particular, big data analysis technology is developing as it becomes easier to collect numerical data. Therefore, in this study, in order to overcome the limitations of qualitatively analyzing investment trends, the association of various products was analyzed using associated analysis techniques. For the experiment, two experimental periods were divided based on the COVID-19 economic crisis, and sales information from individuals, institutions, and foreign investors was collected, and related analysis algorithms were implemented through r software. As a result of the experiment, institutions and foreigners recently invested in the KOSPI and KOSDAQ markets and bought futures and products such as ETF. Individuals purchased ETN and ETF products together, which is presumed to be the result of the recent great interest in sector investment. In addition, after COVID-19, all investors tended to be passive in investing in high-risk products of futures and options. This paper is thought to be a useful reference for product sales and product design in the financial field.

• Journal of Korean Library and Information Science Society
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• v.45 no.4
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• pp.391-408
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• 2014

The purpose of this study is to investigate the effects of a new bibliotherapy program on the happiness index of University students. The results were as follows: Firstly, we can raise the happiness index through the new bibliotherapy program. More specifically, we can reduce negative emotions to a great extent, and raising the level of satisfaction with life is effective. But increasing positive emotions is not easy. Secondly, Effect of bibliotherapy program on the factors of Happiness is different by various situations. Thirdly, reaction of participants of bibliotherapy program to religeous and spiritual media is different.

• The KIPS Transactions:PartC
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• v.11C no.6 s.95
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• pp.755-764
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• 2004

Recently 'Banking IC Card Standard' and EMV Standard by the domestic standard is selected, and it is situation that is developing infrastructure vigorously to alternate Magnetic Stripe card by IC card. This paper analyzes EMV standard that is selecting public key cipher, and research wishes to study unexhausted EMV PKI relatively than internet PKI, WAP PKI etc. This paper propose utilizable EMV base Payment PKI model in IC card base payment system development, and developed EMV CA system with this. Also, this paper supplemented IC card Authentication mechanism that is defined in EMV standard, and propose 'Efficient smart card Authentication mechanism' to improve performance of this mechanism, and estimate performance.

• Korean Journal of Environment and Ecology
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• v.28 no.2
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• pp.247-252
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• 2014

This study was conducted to provide information which will be useful for managing the forest trails effectively. To investigate users' attitudes toward the forest trail construction and use, a questionnaire survey was employed in the Jirisan Dulegil. As the results, most of the respondents perceived that the Jirisan Dulegil have positive impact economically and socio-culturally on community growth. Contrastively, a negative perception existed in the environmental aspect. The users' satisfaction level regarding the Jirisan Dulegil appear to be positive. Users' satisfaction level regarding use services provided in community boundary was evaluated relatively lower. In this point of view, trail use service system provided in the community should be reconsidered for effective forest trail management.

• Korean Journal of Environment and Ecology
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• v.20 no.1
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• pp.20-28
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• 2006

The purpose of this study was to provide basic visitor information through understanding visitors' attitudes to the attributes for recreational experiences. To accomplish the purpose of the study, a questionnaire survey was conducted on major entry points in Taean Coast National Park. As for the results, socioeconomic characteristics of the visitors' parks were similar to the findings of previous studies of national park visitors. The visitors' overall attitudes to significance levels of the 20 attributes which are related to the recreation experience were perceived as from normal to not serious, but a few dissatisfaction factors were indicated in park facility use. The satisfaction level was evaluated in the affirmative.

• Journal of Biomedical Engineering Research
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• v.16 no.1
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• pp.17-24
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• 1995

This paper presents a new compression method (or ECG data using iterated contractive transformations. The method represents any range of ECG signal by piecewise self-afrine fractal Interpolation (PSAFI). The piecewise self-afrine rractal model is used where a discrete data set is viewed as being composed of contractive arfine transformation of pieces of itself. This algorithm was evaluated using MIT/BIH arrhythmia database. PSAFI is found to yield a relatively low reconstruction error for a given compression ratio than conventional direct compression methods. The compression ratio achieved was 883.9 bits per second (bps) - an average percent rms difference (AFRD) of 5.39 percent -with the original 12b ECG samples digitized at 400 Hz.

• Journal of the Institute of Convergence Signal Processing
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• v.3 no.1
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• pp.41-47
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• 2002

Fractal image compression can reduce the size of image data by the contractive mapping that is affine transformation to find the block(called as range block) which is the most similar to the original image. Even though fractal image compression is regarded as an efficient way to reduce the data size, it has high distortion rate and requires long encoding time. In this paper, we presented a hybrid fractal image compression system with the modified SOFM Vector Quantizer which uses improved competitive learning method. The simulation results showed that the VQ hybrid fractal using improved competitive loaming SOFM has better distortion rate than the VQ hybrid fractal using normal SOFM.