• Journal of Chest Surgery
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• v.42 no.5
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• pp.561-565
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• 2009

Background: There haven't been any papers that have analyzed the recent trends in the changing attitudes and results of Korean thoracic and cardiovascular surgeons who submit scientific papers to the major cardiothoracic journals. Material and Method: I analyzed the original articles that were published in the major cardiothoracic surgery journals from 1995 to 2008 by Korean thoracic and cardiovascular surgeons. The data was retrieved from the internet websites of Pubmed, three major international SCI (Science Citation Index) journals and the Korean Journal of Thoracic and Cardiovascular Surgery. I then analyzed the data according to the chronological year, the subjects and the subspecialties. Result: The total number of original articles in the three international journals was 14,629. Among them, the number of articles written by Korean scientists was 157 (1.07%). A sharp increase was identified from 28 articles out of 7,674 articles (0.36%) prior to 2002, to 129 articles out of 6,955 articles (1.83%) after 2003. On the other hand, the annual number of articles in the Korean Journal was markedly decreased from 126.8 articles by 1999 to 80.0 articles after 2000. The annual number of articles in the Korean Journal was also decreased from 58.8% by 1999 to 48.3% after 2000. Conclusion: There was an observed increase in submitting articles to the international SCI journals after 2000 rather than to the Korean journal. The proportion of original articles in the Korean journal is also decreasing. I think we need to pay special attention to improve the quality and quantity of articles published in the Korean journal.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.41 no.5
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• pp.37-45
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• 2004

As Internet technologies are mature, many new applications that are different characteristics are emerging. Recently we see wide use of P2P(Peer to Peer) applications of which traffic shows different statistical characteristics compared with traditional application such as web(HTTP) and FTP(File Transfer Protocol). In this paper, we measured subscriber network of KT(Korea Telecom) to analyze P2P traffic characteristics. We show flow characteristics of measured traffic. We also estimate Hurst parameter of P2P traffic and compare self-similarity with web traffic. Analysis results indicate that P2P traffic is much bustier than web traffic and makes both upstream traffic and downstream traffic be symmetric. To predict parameters related QoS such as packet loss and delays we model P2P traffic using two self-similar traffic models and predict both loss probability and mm delay then compare their accuracies. With simulation we show that the self-similar traffic models we derive predict the performance of P2P traffic accurately and thus when we design a network or evaluate its performance, we can use the P2P traffic model as reference input traffic.

• Journal of the HCI Society of Korea
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• v.1 no.1
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• pp.81-88
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• 2006

With the introduction of the digital technology in the exhibition environment, the information of the exhibit has come to be transmitted through diverse media. The visitors desire has been increased from the simple viewing of the exhibition to the active participation in the exhibition viewing and the utilization of the exhibit information. Subsequently, the study on the service to effectively support the viewing experience and provide the information by utilizing the internet and mobile device for visitors in movement has become important in terms of the exhibition environment. Accordingly, in this study, the current condition in studying the service supporting the exhibition environment and the exhibition viewing, which are being changed into a digital network environment, was examined through the literature and case studies. In order to find out the viewing situation and viewing type of visitors, the visitors behaviors of viewing the exhibition were observed. By analyzing the contents observed, the viewing type and keyword were drawn in accordance with the visitors behaviors of viewing. On the basis of this, visitors needs and problems occurring in case of the exhibition viewing were found out via in-depth interview. The service factors of supporting the exhibition viewing were proposed on the basis of the factors by which visitors needs and problems could be solved via interface in the circumstance when visitors would move round the exhibition hall and view the exhibition. In terms of the service factors, the method to resolve was presented on the basis of the relationship between the exhibit and the space in case of selecting and viewing the exhibit. This was applied into the mobile PDA with the example of the exhibition environment in the national museum. Through the scenario of using, the usefulness of the service proposed and the relevant possibility of utilization were reviewed.

• Convergence Security Journal
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• v.7 no.3
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• pp.87-93
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• 2007

We propose a mobile point-of-sale system, which consists of only mobile information terminals and personal computers. The proposed system provides most of functionalities related with resource planning, adminstration and management, provided by medium-scale or large-scale POS systems, with additional functionalities, such as automatic information gathering and management through mobile interconnection, while eliminating the necessity of additional special-purpose devices, such as bar-code systems. The proposed system transmits order information through wireless and wired communication lines, thus allowing real-time sharing of order information among diverse information devices, such as mobile order receiving terminals, main server within stores, monitors and printers located in production lines. Also, the system is able to transfer such detail information produced within stores in real-time to the enterprise-level accounting, sales, logistics, personnel management system, which facilitate enterprise-wide management and administrative decision-making. No additional programs are required for mobile terminals. Order information received by such terminals are entered into databases through web server of main server and that information is again transferred to main server and production line printers. The proposed system can handle all the point-of-sale information and can provide almost of the POS functionalities by simply utilizing wireless internet, personal computers, and mobile terminals without installing specific-purpose peripheral devices. The proposed system can be widely applied to the small-scale stores and will contribute in reducing construction and maintenance cost required for point-of-sale management.

• Journal of The Korean Association For Science Education
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• v.35 no.4
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• pp.565-572
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• 2015

The purpose of this paper is to offer an analysis on the research trends of web-based inquiry learning effectiveness in science education, and to present suggestions for future studies. This study compiled data on 43 articles in Korea and international journals. The content analysis of articles published were from academic journals related to science education and educational technology from 2000 to 2014. The results are as follows: Among domestic articles, the participants ranged from school children to high school students. On the contrary, among foreign articles, the participants are centralized on secondary school students; most used experimental studies; most of the studies resulted with web-based inquiry learning in science education showing effectiveness on science learning performance or science inquiry ability; all web-based inquiry learning were designed using different models of teaching and learning, with the result in the case of domestic research, the utilized models refer to the STS learning model, Internet utilization problem-center inquiry learning model, Procedural model, while in the case of overseas research, the utilized models are SCY, IBLE, and TESI model. Implications of the findings are then discussed, which implies considerations for further research related to web-based inquiry learning.

• 대한공업교육학회지
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• v.42 no.1
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• pp.125-139
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• 2017

The purpose of this study was to provide a basic research data for increasing the satisfaction by analyzing perception of middle school beginning technology teachers 'technology home economics' class for free semester program. In order to investigate the class operation status, the survey questionnaires from 100 teachers were collected from middle school beginning teachers who teach technology home economics subject currently and analyzed by statistical program(SPSS ver.18). The main results of this study were as follows: First, there was no statistically significant difference to contents and satisfaction of lesson between teachers who experienced free semester program and not. In comparison of male teachers and female teachers, male teachers thought that free semester program was more helpful for student's 'career exploration' than female teachers, and there was statistically significant difference. Second, in the teacher's response according to have practice space and not, the satisfaction average of teachers who have practice space was higher(M=3.64) than those who have not at 'career exploration' and there was statistically significant difference satisfaction. Third, among the teachers who have experienced free semester program, male teachers were having more difficulty 'determining the assessment criteria' than the female teachers and there was statistically significant difference. Fourth, to improve the satisfaction of technical lesson, technology teachers asked to solve lack of practice material, increase of lesson-time, lack of practice space and lesson contents etc. Fifth, technology teachers asked free semester program seminars and information because free semester program lesson contents was given by internet and research groups of technology education.

• Progress in Medical Physics
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• v.16 no.3
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• pp.116-124
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• 2005

Absorbed dose dosimetry protocols of high energy photon and electron beams, which are widely used and based on an air kerma calibration factors, have somewhat complex formalism and limitations for improving dosimetric accuracy due to uncertainty of the physical parameters used. Recently the IAEA and the AAPM published the absorbed dose to water-based dosimetry protocol. In this work web-based dose calibration program for IAEA TRS-398 and AAPM TG-51 protocols were developed. This program developed using the Visual C$\#$ language can be used in the internet. User selectable dosimetry protocol on the web allows the absorbed dose to water data of the two protocols at a reference point to be easily compared, and enables to conveniently manage and understand the current status of the dosimetry calibration performed at participating institutions in korea. This program and the resultant database from the web-based calibration can be useful in developing new dosimetry protocols in Korea.

• Asian Journal for Public Opinion Research
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• v.5 no.2
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• pp.63-83
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• 2018

This exploratory research investigated the factors that influence foreign tourists' decision to use dental services in Thailand. The questionnaire was used to collect data from foreign tourists who used dental services in a hospital or dental clinic in Thailand. Data from 233 respondents completed questionnaires were analyzed using frequency distribution, percentages, mean, and standard deviation. The findings revealed that respondents were most likely to be Asian (54.5%) followed by European (33.9%), females (64.8%) aged between 26-35 years (39.1%), business owners (45.9%), and came to Thailand with friends (47.6%). Regarding travel purposes and contact with dental services, most of them travel for pleasure (52.89%) and contact the clinic directly through the Internet(63.95%) The health/medical services used included health check-up (34.48%), dental services (29.22%), and day spa/massage (23.23%). The dental treatment that respondents had completed or planned to do included dental check-up (29.87%), tooth cleaning (26.68%), and tooth whitening (11.41%). Based on the influence of $_7P$ factors towards the respondent's decision to use the dental service, it was found that the average mean score range from 4.33-4.15 which were at the high to the very high level of influence to their decisions. The people factor had the highest average mean score (mean 4.33, SD= 0.604)followed by the price factor (mean 4.32, SD= 0.651), which both had the highest level of influence. The physical evidence factor had the lowest mean score (mean 4.15, SD+0.752) which was at the high level of importance. It should be noted that the factor concerning the modern technology and dental equipment (mean 4.33, SD=0.606) and factor on the quality of service (mean 4.43, SD= 0.598) had the highest mean score followed by the total cost of the trip including services being reasonable (mean 4.37, SD=0.582). Regarding the country factor, it was found that this factor also had highest influence level (mean 4.30, SD=0.67) and affordability had the highest mean score (mean 4.39, SD=0.614).

• The Journal of the Korea Contents Association
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• v.16 no.3
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• pp.269-287
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• 2016

This study explores of press report on the death of Beongen Yoo based on network analysis and how issue diffuses via Internet and SNS in mainstream news and conservative channels of comprehensive programming. Issue salience, word's visibility and word's connectivity are the main keyword and analysis criteria of this study. Conservative channel of comprehensive programming focused on the surrounding information rather than core information compared to Mainstream media, Conservative channels of comprehensive media was interested in Yu, Beongeon, an article left, brand, rumor of a body and Mainstream media focused on the results of DNA test. Mainstream media covers this case as the discovery of the Yu, Beongeon body, Mainstream media reported as 'the discovery of the body frame, conservative channels of comprehensive programming reports as blame of investigation at the first stage. The former focuses on the cause of death and the latter focuses on the raising of strong doubts frame at the second stage. In case of the third stage the latter covered on the emphasis of the surrounding information. They frames the issue differently based on network analysis. The view point of conservative channel of comprehensive programming is diffused via SNS. This study highlights the role of journalist of mainstream media in the process of agenda-setting

• Journal of Acupuncture Research
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• v.33 no.3
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• pp.67-73
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• 2016

Objectives : The objective of this study is to discuss problems and potential improvements of national health insurance fees associated with miniscalpel acupuncture according to Korean medical doctors' workload, material cost and degree of risk. Methods : We researched the change of relative value points, national health insurance fees, the acupuncture process, and Korean medicine doctors' workload related to Miniscalpel acupuncture, as compared to general meridian point acupuncture. We also examined material cost by surveying pharmacies, internet shopping malls and medical appliance shops. Results : Relative value point for Miniscalpel acupuncture decreased from 2010 to 2012, and remained the same from 2012 to 2016. National health insurance fees for Miniscalpel acupuncture increased by a small margin annually for rise of equivalent index. There was no reporting on workload related to Miniscalpel acupuncture. Material cost of Miniscalpel acupuncture was 18.2~20.7 times higher than actual cost of procedure. There were few studies examining medical accidents related to Miniscalpel acupuncture, and thus we could not evaluate degree of risk. Conclusion : We suggest revaluating Korean medical doctors' workload related to including Miniscalpel acupuncture, to consider the material costs of Miniscalpel acupuncture, and investigate its degree of risk by researching medical accidents.