• 한국BIM학회 논문집
• /
• 제13권4호
• /
• pp.45-53
• /
• 2023

The educational benefits and potential of XR as a new medium are well recognized. However, there are still limitations in understanding the specific effects of XR compared to the more widely utilized representation of images on computer monitors. This study therefore aims to demonstrate the differences in effectiveness between the two technologies and to draw implications from a cognitive comparison of three-dimensional objects represented on a flat surface and virtually. The study was conducted a quantitative research method with an experiment involving two independent groups, and the results were tested using regression analysis. The results showed that for low-level, two-dimensional objects, the computer monitor method may be more effective, but above a certain level of complexity, the effectiveness of learning through the monitor tends to decrease rapidly. On the other hand, the group that used extended reality technology showed relatively high comprehension compared to the monitor group even as the complexity increased, and in particular, unlike the monitor group's rapidly decreasing comprehension level, the extended reality technology group showed a trend of decreasing comprehension with the level of complexity, suggesting the potential for compatibility and predictability in the use of technology.

• 대한전자공학회논문지
• /
• 제22권6호
• /
• pp.103-113
• /
• 1985

본 론문은 packet 교환 방식의 computer 통신망인 KORNET 개발에 판한 4편의 논문중 제1부로서 KORNET의 전체적인 개요와 network management center(NMC)의 개발에 관하여 기술하였다. NMC는 operator dialogue를 통하여 network내 여러 소자의 상태를 감지 하고 가입자와 network의 운용을 담당하며 routing의 관리를 담당하는등 network의 중추적 기능을 구행한다 본 KORNET의 구현에 있어서 통신 protocol은 CCITT의 권고사항을 충실히 따랐으며 NMC의 응용 software인 operator interface, prinary/secondary부, session layer차 packet level adaptor는 자체적으로 개발하였고, packet, link 및 physical level protocol은 Data Goner각사에서 개발한 XODIAC X.25를 응용하여 개발하였다.

• 한국학교수학회논문집
• /
• 제25권4호
• /
• pp.353-374
• /
• 2022

본 연구는 4차 산업시대를 맞아 코딩을 포함한 교수·학습이 강조됨에 따라 코딩수업에서 수학 교수·학습의 효과를 파악하고자 수행되었다. 이를 위해 경기도 D 중학교 1학년 학생들 32명이 스크래치를 활용한 7차시 프로그램에 참여하여, 그들의 활동자료는 컴퓨터에 매 차시 저장되었고, 연구자는 관찰일지를 매주 작성하였다. 중학교 등식의 성질에서 이렇게 수집된 자료를 통해 연구자는 도구화 수준에 대해 개별 학생의 수준을 조사하고, 학생의 컴퓨터프로그래밍 자기효능감을 사전과 사후 검사를 통해 조사하였다. 학생들의 도구화는 다양하게 나타났는데 연구가 시작된 시점에는 도구화의 제 3 또는 4수준에 해당하는 학생이 9%에 불과하였지만 연구마무리 시점에는 80%를 상회하였다. 학생들의 컴퓨터프로그래밍에 대한 자기효능감은 유의한 수준으로 향상되었다.

• 컴퓨터교육학회논문지
• /
• 제20권4호
• /
• pp.67-75
• /
• 2017

본 논문에서는 최근 초 중학생 ICT 리터러시 수준 측정 결과, 학생들의 수준이 '보통'과 '기초' 수준에 상당수 분포하고 있는 원인을 알아보기 위하여 초 중학생들의 ICT 활용 배경이 ICT 리터러시 수준 측정 결과에 미친 영향을 분석하였다. 그 결과, 학생들의 학습활동, 정보수집 그리고 여가활동은 ICT 리터러시 수준과 정적인 상관관계를 가지고 있으며, 이에 대한 활용 횟수가 많을수록 학생들의 ICT 리터러시 수준이 증가하는 것으로 나타났다. 하지만 SNS 등을 활용한 정보교환 활동의 횟수가 많을수록 학생들의 ICT 리터러시 수준은 감소하는 것을 확인하였다. 이에 따라 본 논문에서는 21세기 학습자가 갖추어야할 역량으로 ICT 리터러시 수준을 향상시키기 위해서는 단순한 ICT 활용 기회를 확대하기보다는 학습 활동과 건전한 여가를 위한 ICT 활용 방법을 교육해야 할 것을 제안하였다.

• 한국컴퓨터정보학회:학술대회논문집
• /
• 한국컴퓨터정보학회 2008년도 제39차 동계학술발표논문집 16권2호
• /
• pp.207-210
• /
• 2009

Edge detection is an important process in low level image processing. But many proposed methods for edge detection are not very robust to the image noise and are not flexible for different images. To solve the both problems, an algorithm is proposed which eliminate the noise by mean shift algorithm in advance, and then adaptively determine the double thresholds based on gradient histogram and minimum interclass variance, With this algorithm, it can fade out almost all the sensitive noise and calculate the both thresholds for different images without necessity to setup any parameter artificially, and choose edge pixels by fuzzy algorithm.

• 대한간호학회지
• /
• 제25권4호
• /
• pp.617-632
• /
• 1995

Nowadays, most big hospitals have a computer system to manage their administration. For maxi mum effectiveness in managing the computer system, an analysis of the variables affecting its implementation is necessary from the beginning. This study was done to analyze the variables influencing the operation of a hospital information system (HIS). The theoretical base for this study considered the combined effects of user expectations of computerization, and computer-anxiety. The relationship between variables in the theoretical base were analyzed and the individual characteristics influencing each variable were also analyzed. This study was done in two steps. First, 344 nurses were given an initial questionnaire developed to evaluate the reliability of the items. Based on the results, a second revised questionnaire was administered to 88 nurses who had been working in the areas where HIS was applied. The results of the first and second steps of the study are as follows 1. The initial study was done with nurses who were trained on the computer system briefly before HIS was implemented. The individual characteristics influencing computer anxiety and expectation regarding computer system usage in that initial study included, length of career, type of degree or certification, previous experiences with a computer, training on a computer, desire for computer training, and level of acceptance of a computerized work environment. But in the second study with nurses working in areas of the hospital where HIS was introduced, the work site was the only influencing characteristics. There-fore, in applying a computer system, overcoming work-environment barriers will be more import-ant than any individual characteristics. 2. The computer anxiety of the nurses in both groups, before and after the computer system ap-plication, was below the average level but the expectation of the effects of computerization was above average. The nurses using the computer program showed an above average level of satis-faction with the computer system itself, and with its effect on their efficiency. Therefore, the ability of nurses operating HIS will be positively. predictive. 3. For the variables included in the theoretical framework of the study, all of the correlational coefficients were statistically significant in the analysis of variation correlation. Therefore, the theoretical base of the study, "expectation in con junction with computer anxiety" can be considered an model which can be evaluated. Accord-ing to our analysis, the higher the level of nurses' motivation to use the computer system and the lower the anxiety about computer usage, the higher the possibility of computer system acceptance by nurses. The results of this study showed that in applying a computer system in the hospital, the main characteristic influencing acceptance was where the individual worked rather than personal characteristics such as length of career, type of degree or certification, and previous experiences with a computer. Therefore, it is suggested that the first step in uncovering and eliminating hindrance factors in ap-plication of a computer system should be an analysis of working conditions in relation to the functional content of the computer system. The suitability of the theoretical model based on the hypothesis ap-plied in this study should be further tested.

• 한국컴퓨터정보학회논문지
• /
• 제22권12호
• /
• pp.163-170
• /
• 2017

The purpose of this study is to introduce policy and theoretical implications by analyzing affecting factors for the elder's happiness. For this study, we analyzed data using HLM. Data include a world value survey(hereafter, WVS) as personal level analysis data and also OECD's Social Expenditure Database(hereafter, SOCX) and database from the World Bank as national level analysis data. The subjects of personal level analysis were the elder who are over 65-years od age, and they were total 3,297 people, and while the subjects of national level analysis were total 9 OECD countries. For the data analysis, hierarchial linear model(HLM) analysis was done by using HML 7.0 program. As a result of analysis, First, for the elderly's happiness, they should improve self-disposition, members of social groups, and social class. Second, the old-age pension and the survivor's pension had no meaningful effect on the happiness. but it was found that self - disposition, social class, gender, and health status showed meaningful interaction effect according to old - age pension, survivor pension, per capita GDP, income inequality. This suggests that efforts to improve the happiness of the elderly should be made at the individual level and the national level at the same time.

• 전기전자학회논문지
• /
• 제11권4호
• /
• pp.227-234
• /
• 2007

In this paper, to support a QoS level appropriate to the user in Wireless Home Network based Wireless LAN, we propose a QoS support architecture which includes Wired Network and Wireless Network. Actually, an important problem to support QoS in Wireless Home Network is approached not only on a MAC level in Wireless LAN but also on a integrated method to combine Network layer with Datalink layer. By applying the integrated QoS support method, it is possible to provide QoS support architecture using a Wireless LAN terminal with a minimum changing, and the proposed scheme has advantage of QoS support method, which is more superior than a existing scheme to support QoS in MAC level of Wireless LAN. Simulations results show that overall performance of the proposed scheme can be improved.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2011년도 추계학술대회
• /
• pp.67-68
• /
• 2011

본 논문에서는 Modular Multi-Level Converter(MMLC)의 셀(Cell) 캐패시터(Capacitor) 전압 밸런싱에서 전압맥동 최소화 방법을 제안한다. 암(Arm) 평균 전류를 직류성분으로만 제어 할 경우 기본파 주파수와 2 고조파로 흔들리는 순시전력 항이 셀 캐패시터 전압 맥동을 만든다. 이를 억제 하기위해 암 평균 전류에 2 고조파 교류 성분을 직류성분과 함께 제어하는 방법을 제안한다. 이 방법을 통하여 전압맥동을 줄일 수 있음을 밝히고, 주입되는 2 고조파 전류의 크기와 위상각 계산 방법을 제시한다. 모의실험 결과를 통해 제안된 방법의 유효성을 검증하였다.

• 한국컴퓨터정보학회논문지
• /
• 제24권2호
• /
• pp.209-215
• /
• 2019

The objective of this study was to identify the determinants of digital divide according to the characteristics of the elderly. In order to achieve this objective, this study selected elderly people (${\geq}65$ years old) who used a senior welfare center in Chungcheongbuk-do. The survey was conducted using a self-filling survey method for 12 days. Total 289 copies of questionnaires were used for the analysis. The results of this study are as follows. First, gender and age among the demographic characteristics were the factors causing the digital divide of the elderly. Second, education level, economic level, Secondly, education level, economic level, health level, and occupation were factors creating the digital divide of the elderly. This study suggested practical and policy implications based on these results.