• Proceedings of the KIEE Conference
• /
• 2001.04a
• /
• pp.222-226
• /
• 2001

본 논문에서는 단상 H-bridge 구조의 VSC (Voltage Source Converter)를 이용하여 계통전원을 사용하는 부하의 고조파 전류 보상기능과 전원 Back-up 기능을 갖는 부하전력보상기를 보여준다. 이 두 제어 기능은 전원전압의 유무에 따라 APF의 컨버터 동작과 UPS의 인버터로 동작하게 함으로써 기존 UPS에 부하 전류의 고조파 보상이라는 부가적인 이득을 갖는 이중전력보상기(Dual Function Power Compensator)라 할 수 있다. 컨버터 제어는 Battery 충전 동작과 APF 동작을 동시에 수행하며, 인버터 제어는 정전시 부하에 전원을 공급하는 UPS로서의 동작을 수행하게 된다. 두가지 동작이 성공적으로 수행되기 위해서는 1. 전원전압의 신속한 검출과 판단, 2. 컨버터의 Battery 충전, 3. APF동작을 위한 부하전류의 고조파 전류계산, 4. 전원전압의 동기추종 등이 각각의 동작모드별로 순조롭게 연계동작 되어 야 한다. 본 논문에서는 DFPC의 발생배경과 제안된 DFPC 제어모드의 구분을 결정하는 전원전압의 검출방법에 대하여 소개한다. 그리고 제안된 DFPC의 실제 시스템을 제작하여 각각의 동작상황과 성능을 시험하여 그 결과를 보여준다.

• Journal of Information Management
• /
• v.6 no.6
• /
• pp.156-163
• /
• 1973

"정보과학입문(情報科學入門)"이라는 과목(科目)은 자연과학(自然科學)에 대한 학문적(學問的) 배경(背景)이 없거나 정보과학분야(情報科學分野)의 다른 과목(科目)을 이수(履修)하지 않은 도서관학과(圖書館學科) 학생(學生)을 위해서 교재(敎材)로서 설치(設置)되었다. 본고(本稿)는 이 과목(科目)이 발전(發展)되어온 과정(過程)과, 도서관학과(圖書館學科) 교과과정(敎科課程)에 정보과학입문(情報科學入門)이라는 교과목(敎科目)을 설치(設置)하게 된 동기(動機) 및 그 타당성(妥當性), 그리고 그 교과(敎科)의 목적(目的), 방향(方向) 및 중요(重要)한 주제분야(主題分野), 교과구조(敎科構造) 및 중요(重要)한 내용(內容), 사용(使用)된 교수방법(敎授方法) 및 이 과목(科目)에 대한 개인적(個人的) 평가(評價) 등을 취급하고 있다. 특별(特別)히 교수방법(敎授方法)은 학생(學生)들이 원전(原典)을 읽을 수 있도록 하였다. 학생(學生)들은 복잡(複雜)한 연구논문(硏究論文)은 물론(勿論) 정보과학(情報科學)의 업무(業務)를 도서관업무(圖書館業務)와 성공적(成功的)으로 관련(關聯)시켜 처리(處理)할 수 있다는 사실(事實)을 알게 되었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2017.05a
• /
• pp.317-320
• /
• 2017

S4A (Scratch For Arduino) is a program that controls to Arduino with scratch. In this paper, We developed a simple game form for learning contents and using touch sensor that composed of scratch language based on S4A. We used background music and scores to motivate and interest that beginning to learn English for students.

• Proceedings of the KSR Conference
• /
• 2005.11a
• /
• pp.462-467
• /
• 2005

Design standard specifications for structures applied to Seoul-Pusan High Speed Rail construction were established in 1991. Those specifications have been changed and supplemented in the process of above construction, and need to improve in accordance with the new criteria for construction works of Korean government. Also, a settlement of the criteria for prevention against disasters of Seoul-Pusan High Speed Rail is needed, and related specifications have been revised. The design criteria for Seoul-Pusan High Speed Rail are enacted with knowhow which resulted from High Speed Rail construction, and those are enacted for the purpose of establishing criteria for High Speed Rail construction in the inside and outside of Korea.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• fall
• /
• pp.132-133
• /
• 2021

XR(가상 및 확장현실)에서의 리얼타임 그래픽은 조명이 제 역할을 하지 못하면 인물이 공간감이 느껴지지 않거나 스킨톤이 맞지 않아 이질감을 초래한다. 본 논문에서는 Art-Net 시스템을 활용하여 실제 조명과 가상조명에서의 배경 및 인물의 컬러를 동기화하는 방법을 제안하였다. 제안된 Art-Net 시스템을 통해 인물의 공간감을 향상 시킬 수 있을 뿐만 아니라 보는 이의 몰입감을 높였다.

• The Journal of the Korea Contents Association
• /
• v.12 no.1
• /
• pp.265-274
• /
• 2012

This study aims to examine the physical language of dance art's acceptability of the discourse method of story-telling as a narrative discourse system from the view of story-telling of cultural contents. Dance, through the establishment of relationship between dancers and stage art, can form a discourse system with various literary devices including figures of speech, metaphors, and symbols. The argument over manifestation of dance's narrative components in the concept of story-telling is shown as follows; the background as an object can offer time and spatial backgrounds through stage art and the dancers' performance elements; and, for the character, the dancer himself can be the first-person-narrator and possibly makes plane personality descriptions. As for the elements of main affairs of dance, the stage art components present the background of primary motif of incident and the dancer's diverse relationships form conflicts through the correlation of solo dance, duet, and group dance. The plot as a process of developing the main affair is led by actant such as the dancer's mime actions, gestures, facial expressions, etc. The element of dance's revealing narration is the dance art itself and the developing structure of narration is the dance language's own grammar. Choreographers should compose persuasive dance texts to convey stories efficiently through character decisions, their actions, stage art's elements that display the time and spatial backgrounds, and the development of plot, as a narrative discourse of dance.

• Communications of Mathematical Education
• /
• v.25 no.1
• /
• pp.167-184
• /
• 2011

In D university, 2010 year engineering freshmen were taken basic mathematical ability test and were given basic mathematical ability improvement program based on the test. In order to study the effect of this program for scholastic achievement, we analyse basic mathematical ability test score and college mathematics score among student groups. And to study the effect of this program for scholastic motivation, we survey the mathematical inclination, the recognition of mathematics, and classes of mathematics. As results, engineering freshmen in D university were poor at basic mathematical ability and basic mathematical ability improvement program effected scholastic achievement and motivation in mathematics, greatly. For the success of college mathematics in engineering college, this study suggests basic mathematical ability test and the survey for engineering freshmen's mathematical background. Finally, we suggest that college mathematics must be focused on the improvement of basic mathematical abilities.

• Journal of the Korean Society for information Management
• /
• v.33 no.1
• /
• pp.247-268
• /
• 2016

Although it has been a long subject of study why researchers prefer some cited documents to others, the existing relative researches have had a variety of perspectives on the nature and complexity of the citation behavior and not provided a complete answer to this question. In particular, Korea researchers mainly used statistical analysis of bibliographic information, which has limitations in revealing dynamic and complex cognitive aspects of the citation process. In this study, I investigate the citer perception of citing motives and bibliographic factors through survey and compared the responses according to the researchers' characteristics. After extracting the 22 motivations and 21 factors through the literature analysis and configuring a 5-point Likert scale questions, I conducted a survey in the wat of an e-mail attachment. From the SPSS 22.0, the frequency analysis, t-test, and one-way ANOVA were performed on the 354 valid samples. As a result, it is found that supporting is considered the most important citing motive and social connection, self-citation have little influence. In the case of bibliographic factors, the journal's reputation was recognized the most influential factor and the number of pages and authors was the least. Significant differences in fields of study and research careers were showed in some parts. These results can substantiate earlier studies, determine whether the factors assumed influential in selecting references were intended, and suggest the search point to the specialty library or academic database.

• The Journal of the Korea Contents Association
• /
• v.12 no.1
• /
• pp.416-429
• /
• 2012

This study was to assess the effects of a recovery oriented integrated rehabilitation program on cognitive social function, rehabilitation motivation, and mental health recovery. This program is involved motivation enhancement program with 4 subprograms composed of cognitive rehabilitation, emotion management, vocational rehabilitation, family education program. The subjects were 34 patirents with schizophrenia who had been hospitalized at National Mental Hospital on local area. The study was a non-equivalent control group non-synchronized design with two groups, an experimental group(18 patients) and a control group(16 patients). The collected data were analyzed using SPSS 12. 0. The results of the data show that there was not a significant increase in the symptom, cognitive and social function. But there was a significant increase in readiness of rehabilitation(maintenance, p=.027) and mental health recovery (p=.039). Short term recovery oriented integrated rehabilitation programs in inpatient settings are more available for motivation of rehabilitation and mental health recovery than symptom reduction or functional improvement. Therefore there should be more efforts to create more recovery oriented service provision in clinical settings.

• Information Systems Review
• /
• v.5 no.2
• /
• pp.71-90
• /
• 2003

Virtual communities have been suggested to play important roles such as attracting customers, building customer loyalty, and leading to commercial transactions. Little research in marketing has focused on virtual communities in spite of its importance indicated by many practitioners and conceptual studies. More specifically, little research has empirically examined factors of customer participation and its consequences. This research investigate if customers' participation motives in virtual communities affect their sense of community and if sense of community affects customers' loyalty towards and purchase intentions from the website offering the community service. One hundred ninety six questionnaires were collected from individuals who have participated in and have been involved in online activities in various virtual communities. Major results of this research can be summarized as follows. First, participation motives employed significantly affected customers' sense of community and more specifically, perceived ease of use and perceived playfulness had a large influence on the customers' sense of community. Second, customers' sense of community positively affected their loyalty toward the community and more specifically, membership and emotional connection had a large influence on loyalty. Third, customers' sense of community did not affect directly their purchase intentions. Fourth, customers' loyalty toward virtual communities had a significant, positive, although marginal, influence on their purchase intentions.