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      • KCI등재후보
      • KCI등재

        국가기록원 질의로그 빅데이터 기반 이용자 정보요구 유형 분석

        백지연,오효정 한국정보관리학회 2019 정보관리학회지 Vol.36 No.4

        이용자의 정보요구를 파악하기 위한 다양한 방법 중 로그 분석 방법은 이용자의 실제 검색 행위를 사실적으로 반영하고, 대다수 이용자의 전반적인 이용행태를 분석할 수 있다. 이에 본 연구에서는 국가기록원 웹 포털서비스를 통해 입수된 대량의 질의로그 빅데이터를 기반으로 이용자의 정보요구를 파악하기 위해 1) 질의에 내포된 정보요구 유형별과 2) 검색결과로 제공한 기록 유형별 분석을 진행하였다. 분석에 활용한 질의로그는 국가기록원이 웹을 통해 검색서비스를 제공한 2007년부터 2018년 12월까지, 총 141개월 동안 수집된 월별 상위 100개 질의어 1,571,547개를 대상으로 하였다. 나아가 분석결과를 토대로 이용자 검색 만족도를 향상시킬 수 있는 개선방안을 제안하였다. 본 연구의 결과는 국가기록원 검색 서비스 개선 및 고도화를 위한 구체적이고 실질적 방안을 제시했다는 점에서 의의가 있다. Among the various methods for identifying users’s information needs, Log analysis methods can realistically reflect the users’ actual search behavior and analyze the overall usage of most users. Based on the large quantity of query log big data obtained through the portal service of the National Archives of Korea, this study conducted an analysis by the information type and search result type in order to identify the users’ information needs. The Query log used in analysis were based on 1,571,547 query data collected over a total of 141 months from 2007 to December 2018, when the National Archives of Korea provided search services via the web. Furthermore, based on the analysis results, improvement methods were proposed to improve user search satisfaction. The results of this study could actually be used to improve and upgrade the National Archives of Korea search service.

      • KCI등재

        이산 웨이블릿 변환과 명암도 동시발생 행렬을 이용한 컬러 레이저프린터 판별 알고리즘

        백지연,이흥수,공승규,최정호,양연모,이해연,Baek, Ji-Yeoun,Lee, Heung-Su,Kong, Seung-Gyu,Choi, Jung-Ho,Yang, Yeon-Mo,Lee, Hae-Yeoun 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.3

        고성능 저가의 디지털 인쇄기기의 출현으로 불법적인 위변조가 사회적인 문제로 대두되고 있고, 이를 해결하기 위해서 디지털 포렌식 기술이 필수적이다. 본 논문에서는 컬러 디지털 인쇄기기를 판별하기 위한 디지털 포렌식 기술을 제안한다. 컬러 디지털 인쇄기기는 제조사마다 인쇄방법이 다르기 때문에, 출력물에 작은 차이가 존재한다. 이와 같은 차이점을 활용하면, 임의의 주어진 출력물에 대해 어떠한 인쇄기기로 출력되었는지 구별이 가능하다. 제안하는 방법에서는 차이점을 구별하기 위하여 출력물을 스캔한 디지털 이미지에 대해 이산 웨이블릿 변환을 수행하여 계산한 고주파 영역을 추출한다. 이에 대해 명암도 동시발생 행렬을 계산한 후에 행렬 데이터의 표준편차, 첨도, 왜도, 공분산, 상관계수의 특징을 추출하였다. 추출된 특징을 서포트 벡터 머신 분류기에 적용하여 디지털 인쇄기기를 판별하였다. 제안한 알고리즘의 성능을 분석하기 위하여 총 2,597장 이미지와 7대 프린터(HP, Canon, Xerox DCC400, Xerox DCC450, Xerox DCC5560, Xerox DCC6540, Konica)를 가지고, 기존 알고리즘과 비교 분석하였다. 그 결과에 따르면 제안한 알고리즘은 컬러 디지털 인쇄기기를 판별하는데 있어서 평균 96.9% 정확률을 보였다. High-quality and low-price digital printing devices are nowadays abused to print or forge official documents and bills. Identifying color laser printers will be a step for media forensics. This paper presents a new method to identify color laser printers with printed color images. Since different printer companies use different manufactural systems, printed documents from different printers have little difference in visual. Analyzing this artifact, we can identify the color laser printers. First, high-frequency components of images are extracted from original images with discrete wavelet transform. After calculating the gray-level co-occurrence matrix of the components, we extract some statistical features. Then, these features are applied to train and classify the support vector machine for identifying the color laser printer. In the experiment, total 2,597 images of 7 printers (HP, Canon, Xerox DCC400, Xerox DCC450, Xerox DCC5560, Xerox DCC6540, Konica), are tested to classify the color laser printer. The results prove that the presented identification method performs well with 96.9% accuracy.

      • KCI등재

        마이그레이션 이론을 적용한 유튜브로의 소비자 정보채널 전환에 관한 연구

        백지연,이진명 한국소비자학회 2023 소비자학연구 Vol.34 No.4

        The purpose of this study is to identify the current status of YouTube use as a consumer information search channel and to identify the behavior of switching information channels from portal sites to YouTube. By applying migration theory as a theoretical framework, the perceived benefits of YouTube were adopted as pull factors, the perceived risks of portal sites were adopted as push factors, and conversion costs were adopted as mooring factors to predict consumers' information channel switching behavior. An online survey was conducted on adults in their 20s to 50s who had experience using YouTube within the last month, and a total of 312 data were collected and analyzed by applying t-test, ANOVA, and multiple regression analysis. The main results of this study are as follows. First, YouTube was found to be the most used information channel by consumers in the purchasing process. It was followed by portal sites, online price comparison sites, manufacturer sites, and SNS in that order. Second, as a result of surveying consumers' perceptions of online information channels, the level of commerciality of portal site contents was high. This suggests that consumers perceive portal sites as a source of commercial information due to C2C information generated by many online advertisements and corporate sponsorship. The usability of YouTube's content and the level of personalization were high, which can be seen as a relative advantage of YouTube as a source of consumer information. Third, as a result of multiple regression analysis, it was found that YouTube's content usefulness and information source trust, as well as portal site's platform distrust and content commerciality, had a significant positive effect on the consumer information channel conversion from portal site to YouTube. The effect of conversion cost was found to be negative, indicating that time and effort costs impede the conversion of information channels from portals to YouTube. This study is meaningful in that it demonstrates the importance of YouTube as a consumer information channel and provides useful implications for improving information channels by identifying factors that affect consumers' conversion of information channels from portal sites to YouTube.

      • KCI등재

        교수자의 피드백 제공에 따른 EFL대학생의 영어 쓰기 오류의 변화

        백지연,나경희 한국외국어교육학회 2018 Foreign languages education Vol.25 No.2

        The purpose of this study is to investigate error patterns in EFL college students’ English writing as well as their change over time, based on the teacher’s feedback. In order to accomplish this purpose, two research questions were constructed; first, what are the characteristics of Korean EFL students’ writing based on the maturity of English sentence by the T-unit analysis? Second, what types of error patterns are produced in Korean EFL students’ writing? Also, how do the error patterns change based on the teacher’s feedback over time? The participants were four Korean EFL college students, and they were asked to pre-write, draft, revise and edit until they completed their final draft. The results of pre- and post-writing test were also analyzed. The major findings are as follows: 1) The mean number of T-unit among participants was 42.25 units, and the mean number of words per T-unit was 10.95 words. 2) The most frequently committed errors were found out as lexical and morphological errors. Moreover, the rate of lexical and sentence structure errors has been dropped, whereas the rate of punctuation errors has increased as the teacher’s feedback progressed over time. Pedagogical and practical suggestions are also made on the effective teaching of English writing in Korean classroom settings.

      • KCI등재후보

        교육훈련 요구분석에 관한 이론적 고찰 및 사례연구

        백지연 한국산업교육학회 2007 산업교육연구 Vol.14 No.-

        교육훈련 프로그램을 위한 요구분석은 효과적인 프로그램 수행을 위해서 반드시 필요한 작업이며, 교육훈련 요구분석의 정확한 개념에 대한 이해, 수행방법상의 장·단점, 선행 연구자들의 교육훈련 요구분석 사례 분석을 통해 이론과 연계된 실무상의 요구분석을 이해하는 것은 산업교육 전문가들에게 있어 매우 중요한 사안이라 할 수 있다. 따라서 이 연구의 목적은 교육훈련에 대한 요구분석에 관련된 이론을 고찰하고 제조업체A의 사례연구를 통해 요구분석의 방법을 제안하고자 한다. 무작위추출을 통해 제조업체A의 생산직 종사자 71인을 인터뷰 대상자로 선정하고, 중요사건기법을 사용하여 총 123개의 중요사건 스토리를 수집하였다. 팀웤에 대한 교육요구가 가장 높고, 다음으로 본인 책무 외의 업무라도 자원할 수 있도록 하는 교육요구, 매뉴얼이나 회사의 규정, 근무시간 준수에 대한 교육요구, 품질관리 및 문제의 원인을 파악하고 적극적인 해결책 수행을 위한 교육요구가 도출되었다. Training needs assessment is a very vital process to conduct effective training programs. Human resource development professionals must have clear understanding about the concept of training needs assessment and training needs assessment methodologies with their pros and cons. Therefore, the purpose of this study is to provide literature review on training needs assessment and the data gathering methods and to conduct a case study. Seventy one line workers were selected as interviewees through a random sampling, and 123 stories were collected through critical incident technique. The results show four training needs areas: (1) the training needs on teamwork, (2) the training needs on volunteering behavior besides given tasks, (3) the training needs on observing work manuals and regulations, and (4) the training needs on quality management.

      • KCI등재

        이문화간 멘토링이 멘티에게 미치는 영향에 관한 연구-한국인 비서 멘티와 외국인 멘토를 중심으로-

        백지연,홍세희 한국비서학회 2007 비서·사무경영연구 Vol.16 No.1

        The purpose of this study is to investigate the effects of cross-cultural mentoring on protégés. Based on twenty five mentoring cases, this study identifies and analyzed protégés' benefits and challenges from cross-cultural mentoring between Korean secretary protégés and non-Korean mentors. The respondents answered that besides the common benefits obtained from both non-cross-cultural mentoring and cross-cultural mentoring, they experienced more satisfaction from being mentored by non-Koreans. Factors of satisfaction include: broadened perspective by thinking in the shoes of a different culture, being able to broaden their career by handling challenging projects, and increased foreign language skills. This study can aid current secretaries and secretaries in training to form a good relationship with their non-Korean bosses and to develop their cross-cultural sensitivity. This paper also contributes to mentoring research by broadening the scope of mentoring practice to meet the needs of the current global business environment and suggesting the involvement of more psychosocial aspects including culture.

      • KCI등재

        Korean College Students’ Utilization of Machine Translation Tools for their Presentation Scripts

        백지연,나경희 한국외국어교육학회 2022 Foreign languages education Vol.29 No.3

        The purpose of this research is to find out how EFL college learners utilized machine translation while writing their presentation scripts. Specifically, it attempted to examine the characteristics of the English translation outputs by MT and students’ self-edited drafts, and their perceptions toward the use of MT in English writing classes. Six college students were asked to submit one Korean draft, two machine translation drafts, and one self-edited draft, and two in-depth interviews were conducted with each of the participants during the course of the semester. Grammarly (2022), a free online grammar and spelling checker, was used to examine the characteristics of the collected writings, and Miles and Huberman’s (1994) three-step analytic method was employed to analyze the data from the in-depth interviews. The results of data analysis revealed that 1) there were more lexical errors than grammatical errors, and the number of the errors did not show a big difference between the different drafts; 2) Also, students viewed the use of MT in the English writing classes positively but found it difficult to properly use. Based on the research findings, pedagogical implications for the effective use of MT in English writing classes were suggested.

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