• 호남수학학술지
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• 제30권4호
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• pp.589-602
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• 2008

As a survey-type article, the paper reviews various digital topological utilities from digital covering theory. Digital covering theory has strongly contributed to the calculation of the digital k-fundamental group of both a digital space(a set with k-adjacency or digital k-graph) and a digital product. Furthermore, it has been used in classifying digital spaces, establishing almost Van Kampen theory which is the digital version of van Kampen theorem in algebrate topology, developing the generalized universal covering property, and so forth. Finally, we remark on the digital k-surface structure of a Cartesian product of two simple closed $k_i$-curves in ${\mathbf{Z}}^n$, $i{\in}{1,2}$.

• 호남수학학술지
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• 제33권2호
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• pp.231-246
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• 2011

Let $X_{n,k}$ be a Khalimsky topological n dimensional subspace with digital k-connectivity. In relation to the classification of spaces $X_{n,k}$, by comparing several kinds of continuities and homeomorphisms, the paper proposes a category which is suitable for studying the spaces $X_{n,k}$.

• 기록학연구
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• 제63호
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• pp.5-36
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• 2020

행정안전부 전자정부국은 행정정보시스템의 디지털정보 보존을 본격 추진하기 위하여 전자정부법 개정을 추진하고 있다. 디지털정보의 보존은 공공기록물법에 규율된 사항이라 개정이 될 경우 양 법률 간의 갈등이 예상된다. 이러한 상황에서 공공기록정책의 전환은 더 이상 미룰 수 없는 과제가 되었다. 현재의 공공기록정책은 디지털정보를 관리하기에 미흡하다. 이 연구의 목적은 디지털 전환에 대응한 공공기록정책의 방향을 제시하는 것이다. 이를 위하여 최근 공공기록정책이 어떠한 변화양상을 보이는지 영국과 호주를 사례로 분석하였다. 정보관리로의 확장, '디지털 연속성' 관리, 자산으로의 정보의 관리, 정보거버넌스 체계의 구축이라는 특징을 도출하였으며, 행정정보시스템의 디지털정보의 경우 보존과 활용 목적을 동시에 충족시켜야 한다는 점에서 기록자산으로서의 정보관리 접근법을 강조하였다.

• 호남수학학술지
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• 제35권3호
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• pp.515-524
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• 2013

To study product properties of digital spaces, we strongly need to formulate meaningful adjacency relations on digital products. Thus the paper [7] firstly developed a normal adjacency relation on a digital product which can play an important role in studying the multiplicative property of a digital fundamental group, and product properties of digital coverings and digitally continuous maps. The present paper mainly surveys the normal adjacency relation on a digital product, improves the assertion of Boxer and Karaca in the paper [4] and restates Theorem 6.4 of the paper [19].

• 호남수학학술지
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• 제26권1호
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• pp.107-117
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• 2004

The aim of this paper is to introduce a digital $({\kappa}_0,\;{\kappa}_1)$-covering map and a local $({\kappa}_0,\;{\kappa}_1)$-homeomorphism. And further, we show that a digital $({\kappa}_0,\;{\kappa}_1)$-covering map is a local $({\kappa}_0,\;{\kappa}_1)$-homeomorphism and the converse does not hold. Finally, some property of a digital covering map is investigated with relation to some restriction map. Furthermore, we raise an open problem with relation to the product covering map.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2009년도 춘계학술발표회 논문집
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• pp.87-89
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• 2009

국내의 수치지도는 도엽단위의 2차원으로 제공되어 사용자가 의사결정에 직접 이용하는데 제약이 따르게 된다. 본 연구에서는 미국, 영국, 캐나다 등 선진국에 대한 수치지도의 현황과 특성을 분석하였다. 연구결과, 미국의 National Map과 영국의 Master Map은 데이터에 연속성과 최신성을 유지하고 있으며, 유일식별자를 포함하고, ISO, OGC 등의 국제표준을 참고하여 수치지도가 제작되고 있었다.

• 디지털콘텐츠학회 논문지
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• 제14권4호
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• pp.471-479
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• 2013

WiBro (Wireless Broadband Internet) 기술은 120km/h로 이동 중에도 상 하향 1 Mbps 이상의 전송 속도를 보장한다. 그러나 건물 내에서는 이동 중 데이터 전송 요구가 많지 않고, 다양한 업무요구로 인해 WiBro가 제공하는 것보다 더 높은 속도가 요구된다. 따라서 WiBro 망이 전개된 특정 기관 내에서 사용자에 대한 서비스 연속성을 보장하기 위해서 WiBro-WiFi 상호 연동을 통해 작업자의 실내외 및 이동중 광대역 데이터 전송능력을 확보할 수 있다. 본 논문은 와이맥스 포럼 및 3GPP (3rd Generation Partnership Project) 표준에 대한 분석을 수행하고, WWI (WiBro-WiFi Interworking) 네트워크 구성 방안을 제안하여 연동 네트워크의 구축 방법을 제시하고, 컴퓨터 시뮬레이션을 통하여 제안 사항의 타당성을 검증하였다.

• 디지털융복합연구
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• 제14권9호
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• pp.123-132
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• 2016

본 연구는 "어떤 기업이 거래 상대로서 매력적이지 않음에도 불구하고, 단지 오랜 기간 거래를 했다는 이유로 관계를 지속하는 원인이 무엇일까?" 라는 연구 문제로 출발하였다. 저자들은 이를 고객 가치로 설명하였으며, 고객 가치를 B2B 거래 관계의 스펙트럼 안에서 거래 가치, 관계 가치, 평가적 가치라는 세 가지 유형으로 구분하여, 거래 지속의도에 미치는 영향에 대해 실증분석을 실시하였다. 그 결과, 기업 간 거래를 유지하는데 있어, 거래 가치 혹은 관계 가치라는 양자택일적인 가치 판단이 이루어지는 것이 아니라, 거래를 지속할 것인지 말 것인지에 관한 의사결정은 거래 가치와 관계 가치를 토대로 평가적인 측면에서 이루어진다는 것을 알 수 있었다. 즉, 기존 연구가 거래 가치 혹은 관계 가치라는 한 측면에서 거래의 지속성을 다루었다면, 본 연구는 이들을 동시에 고려하였다는 점에서 그 의의를 갖는다고 할 수 있다.

• 한국실내디자인학회논문집
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• 제26권6호
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• pp.81-96
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• 2017

This study aims at establishing a basic theory for the combination of architecture and movies by comparing the long-take technique of movies and the continuity of space, one of space composition principles, which is important in digital architecture based on Jacques Lacan's visual-art theory and finding common features and differences of them. The following is a summary of the conclusions. First, analyzing the long-take technique on the basis of Lacan's visual-art theory found that the subject of representation is scenes of movies and that staring shows features of narrative. Second, the long-take technique can be thought as a cinematic technique which tries to realize the real order beyond the symbolic order in real life through the process of continuous replication of replication of replication of a scene in one shot. Third, in contemporary architecture, which is compared to the long-take technique in the past, the inclined space of opened gaze is similar to the method which tries to realize architectural space of the reality which belongs to the symbolic order close to the real order which belong to significant in human unconsciousness. Fourth, the freeform continuous space of closed gaze, which can be compared to contemporary long take combined with computer graphic technology, has more difficulty in realizing the real order than the long-take technique in the past and inclined, continuous space as the feature which belongs to $signifi{\acute{e}}$ in human consciousness has been strengthened through the circulation which repeats and expands along an observer's movement. Fifth, when the contemporary long-take technique and freeform continuous space expand gaze which opens from the inside to the outside, it is considered that the space which is closer to the real order than the classic long-take technique and inclined continuous space can be created.

• 디지털산업정보학회논문지
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• 제18권1호
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• pp.79-91
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• 2022

In this study, the effects of self-efficacy, perceived usefulness, perceived ease of use, and depression on college students' academic persistence in the COVID-19 epidemic and the resulting non-face-to-face education situation were identified as mediating effects on learning satisfaction. In the second semester of 2020, a survey was conducted on students enrolled in a four-year university in Daegu and the data were statistically analyzed. The path coefficient was estimated by the Smart PLS bootstrap method and the significance of the path coefficient was verified. The Sobel Test was conducted to verify the mediating effect of academic continuity intention as a parameter. The research results can be summarized as follows. First, it was found that self-efficacy and perceived usefulness had a significant influence in the relationship with learning satisfaction. Second, the relationship between learning satisfaction and academic continuity intention was found to have a significant influence. Third, depression and ease of use did not show any significant influence in the relationship between learning satisfaction. Finally, a Sobel Test was conducted to verify the mediating effect of academic continuity intention with self-efficacy, usefulness, ease of use, and depression as independent variables and learning satisfaction as parameters. As a result of both regression analyses, it was found that β values decreased, and learning satisfaction had a mediating effect. As a result of this study, it is suggested that research to increase learner satisfaction and develop various contents to increase the effectiveness of education that can increase self-efficacy and perceived usefulness should be conducted in parallel. I think this study can be used as basic data in establishing measures to continue studying for college students in natural disaster situations or psychological crisis situations called COVID-19.