• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.4
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• pp.859-868
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• 2018

Previous research related to recovering deleted data in database has been mainly based on transaction logs or detecting and recovering data using original source files by physical collection method. However there was a limit to apply if the transaction log does not exist in the server or it is not possible to collect the original source file because a database server owner does not permit stopping the database server because of their business loss or infringement at the scene. Therefore it is necessary to examine various collection methods and check the recoverability of the deleted data in order to handling the constraints of evidence collection situation. In this paper we have checked an experiment that the recoverability of deleted data in the original database source according to logical and physical collection methods on digital forensic investigation of Microsoft SQL Server database.

• The Korean Journal of Archival Studies
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• no.65
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• pp.199-226
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• 2020

It is widely agreed that a documentation strategy that considers the social context of fragmented records is needed for documentation of social memories. This paper examined a new methodology named Seoul Narrative Archiving Policy(S-NAP) which was developed for the documentation of social memories in metropolitan areas. Also, the paper reviewed the applicability of S-NAP through the collection cases of Seoul Metropolitan Archives. The development process of the S-NAP is as follows. First, acquisition topic domains that cover an entire metropolitan region were developed. Next, implementation units(S-NAP) were designed through extensive data analysis that encompasses social, economic, culture, and art areas and reflects outcomes of regional studies. As a result, a total of nine acquisition topic domains, 61 parents S-NAP, and 184 children S-NAP were derived from the aforementioned methodology and methods. Finally, this paper proposed the applicability of S-NAP as archival contents and as a supportive tool for archival activity networks.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.9B
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• pp.1295-1304
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• 2010

This paper proposes a fault-tolerant data aggregation which provides energy efficient and reliable data collection in wireless sensor networks. The traditional aggregation scheme does not provide the countermeasure to packet loss or the countermeasure scheme requires a large amount of energy. The proposed scheme applies caching and re-transmission based on the track topology to the adaptive timeout scheduling. The proposed scheme uses a single-path routing based on the traditional tree topology at normal, which reduces the dissipated energy in sensor nodes without any countermeasure against packet loss. The proposed scheme, however, retransmits the lost packet using track topology under event occurrences in order to fulfill more accurate data aggregation. Extensive simulation work under various workloads has revealed that the proposed scheme decrease by 8% in terms of the dissipated energy and enhances data accuracy 41% when the potential of event occurrence exists as compared with TAG data aggregation. And the proposed scheme decrease by 53% in terms of the dissipated energy and shows a similar performance in data accuracy when the potential of event occurrence exists as compared with PERLA data aggregation.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.6 no.2
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• pp.15-25
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• 2007

This paper aims at testing the applicability of RFID (radio frequency identification) based link travel time estimation algorithm in urban street settings in Jeju island Korea. For this, we developed algorithm and compared link travel times derived from the RFID probe based algorithm with those from (already available) GPS based link travel time estimation algorithm and with the actual link travel times from survey. RFID readers are composed of master reader and slave reader and the participating passenger cars were supposed to be equipped with RFID tag inside the vehicle. The data were sent to traffic information center and we used those data in comparison. The algorithm produced link travel times in a successful manner and the accuracy of those link travel times was about 88%. For the same link segments, the accuracy of GPS based link travel times was 93%. The t-test showed that both RFID and GPS based link travel times were not different in accuracy from statistical point of view. The applicability of RFID was tested successfully and the algorithm proposed seemed to be used in similar urban settings. Some limits and future research agenda have also been presented.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.730-732
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• 2003

최근의 웜이나 바이러스로 인한 침해 사고는 다수의 불특정 시스템을 대상으로 하고 있으며 짧은 시간동안 다수의 시스템을 감염시킨다. 현재의 침해 사고의 처리는 시스템이 감염된 후 이를 처리하는 방식이나 이러한 방식으로는 짧은 시간 안에 급속도로 확산되는 침해사고를 막기가 힘들다. 본 논문에서는 칭해 사고의 효과적인 처리를 위한 새로운 프레임 워크를 제안하고자 한다. 평소에 관리하고자 하는 서버들의 정보를 수집하고 관리함으로써 새로운 취약점이 발견되었을 때 또는 침해 사고가 발생하였을 때 취약할 가능성이 있는 서버들을 신속히 파악하여, 취약점을 점검하는 도구를 생성하는데 필요한 공통 프레임 워크를 개발하여 보다 빠르게 취약점을 점검하는 도구를 생성, 이론 이용해 취약할 가능성이 있는 서버들을 점검한다. 점검결과 감염된 시스템은 치료하고 취약하나 감염이 되지 않은 시스템은 취약점을 제거한다. 제안된 프레임 워크는 명소에 서버들의 정보를 수집함으로써 침해사고가 발생하였을 감염 가능성이 있는 서버들을 빠르게 확인 할 수 있다. 또한 취약점 점검 도구 생성 프로그램을 사용함으로써 점검 코드의 삽입만으로 쉽게 취약점 점검 도구를 생성, 확산되기 전에 타 시스템에서 동종의 침입을 예방할 수 있다.

• Korea Petroleum Association Journal
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• no.7 s.41
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• pp.78-82
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• 1984

일본 통산성 자원에너지청은 중남미지역의 LPG 생산 및 수출 가능성등에 관해 현지조사를 실시하고, 최근 「석유가스 개발 가능성 조사보고서 」를 발표했다. 자원에너지청은 일본의 LPG공급이 거의 수입에 의존하고 있으며, 특히 중동지역에서의 수입이 80%로 편중되어 있기 때문에 수입원의 다변화 정책을 표명하고 있다. 이 조사는 일본 LPG 협회내에 「석유가스개발 가능성 조사위원회 」를 설치하여, 멕시코, 베네수엘라 및 미국을 중심으로 LPG의 생산동향 및 수출여력의 가능성 등에 관한 사전에 자료를 수집ㆍ분석한후, 조사단을 파견하여 2주간에 걸쳐 현지조사를 할 것이다. 다음 내용은 이 조사결과를 요약한 것이다. (편집자주)

• Journal of the Korean Society for information Management
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• v.26 no.4
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• pp.169-186
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• 2009

This paper examined what factors affect the immediacy index showing the average number of times an article is cited in the year it is published. Not only Seventy-one immediacy indexes for subject field biology on JCR 2008 edition were gathered, but also many characteristics of scholarly journals that may influence the indexes directly or indirectly were aggregated. Simple correlation coefficient analysis, factor analysis, and regression analysis were performed on the paper. Therefore factors such as physical volume, availability, forthcoming issue, age and language explaining 67.64% of total variance were identified. After regression analysis using these factors as independent variables, the results were statistically significant. The results showed physical volumes, the total pages of publication, have an influence upon immediacy indexes obviously, although it is expected that journal reputations may affect immediacy indexes. Generally open access journals had high immediacy indexes. High ranked journals on immediacy index were apt to be issued frequently, uploaded very often on PMC, and published in major countries including United States and United Kingdom.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.196-198
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• 2000

본 논문에서는 음란사이트를 효과적으로 탐지하기 위하여 퍼지 추론을 이용한 방법을 제안한다. 사용자로부터 몇 개의 음란 사이트 URL을 질의로 입력받아, 해당 URL로부터 수집된 웹 문서들에서 웹 태그와 불용어를 제외한 모든 용어들을 추출한 후, 용어의 DF, TF, HI(Heuristic Information) 정보들을 퍼지 추론에 적용하여 사용자가 제시한 음란 사이트에서 용어의 중요도를 산정한다. 또한, 웹 로봇은 인터넷에서 웹 문서를 수집하고, 퍼지 추론에 의해 산정된 용어의 중요도를 이용하여 수집된 웹 문서가 음란 문서일 가능성을 판별한다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.9 no.9
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• pp.797-808
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• 2019

The purpose of this study is to collect the psychological responses that occur while watching TV home shopping ads in verbal form, and explore the possibility of measuring the effectiveness of TV home shopping ads using linguistic analysis. The psychological responses during watching positive and negative ads of participants(40 housewives and female college students) were collected in a linguistic form using a think aloud and self-report measurement. It was analyzed by KLIWC, a Korean language analysis program. As a result of the analysis, there was a difference in psychosocial variables as well as linguistic variables between positive and negative evaluation ads. Also, various variables of KLIWC were correlated with the variables of advertising effectiveness (purchase stimulus, ad attitude, product attitude, purchase intention) and advertising response variables. This suggests the possibility of constructing a psychological response profile and measurement of advertising effectiveness using language analysis.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.507-511
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• 2005

본 연구에서는 수자원 지속가능성 지수(WRSI)를 금강유역에 적용하여 소유역별 수자원 지속가능성을 평가하였다. WRSI의 적용을 위하여 금강유역을 주요 계측지점의 위치와 자료수집의 용이성을 고려하여 27개의 소유역으로 분할하였다. WRSI 산정의 효율성과 정확성을 확보하기 위하여 소유역별 사회, 경제, 환경과 관련된 통계자료에 대한 GIS 주제도를 구축하였다. WRSI를 구성하는 지표들의 표준화는 적정확률분포형을 적합도 검정을 실시한 후 초과확률을 산정하는 방법을 적용하였다. WRSI를 이용하여 금강유역의 소유역별 수자원 지속가능성 지수를 산정한 결과, 금강유역의 소유역별 수자원 지속가능성 지수는 하류에 위치한 유역들보다 상류에 위치한 유역들이 큰 값을 나타냈다. 수자원 지속가능성 지수의 지표들간의 상관관계를 분석하기 위하여 상관분석을 실시한 결과, 사회적 공평성 세부지수를 구성하는 지표들과 유지관리 능력 세부지수를 구성하는 지표들간의 상관성이 높은 결과를 나타냈다.