• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.15-18
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• 2003

ATSC 방식을 사용하는 DTV 수신기는 심볼 타이밍 동기를 맞추기 위해 77.3㎲마다 존재하는 세그먼트 싱크를 이용한 방법 또는 가드너 알고리즘을 사용한다. 이 중 가드너 알고리즘을 사용하는 방법은 다중 경로 채널 환경으로 인해 타이밍 옵셋이 발생한다. DTV 수신 채널 환경이 많은 수의 다중 경로 신호를 포함하고 있기 때문에 가드너 알고리즘을 사용한 DTV 수신기는 타이밍 옵셋이 발생한다. 이 타이밍 옵셋은 샘플링 순간을 잘못된 시점으로 옮기기 때문에 등화기의 성능이 열화된다. 다중 경로 채널 환경에서 등화기의 성능을 최적화하는 샘플링 순간은 주 경로 신호의 크기가 최대가 되는 점이다. 본 논문에서는 타이밍 옵셋 보상기를 사용하여 샘플링 순간을 주 경로 신호의 최대점으로 옮겨 타이밍 옵셋을 보상하고 등화기로 입력되도록 하여 DTV 수신 성능을 개선하였다. 타이밍 옵셋 보상기는 채널 상관기, 최대점 탐색기, 타이밍 보상용 보간 필터로 구성되어 있다. 타이밍 옵셋 보상기와 등화기를 연계 실험하여 성능 향상을 분석하였다.

• Journal of Convergence for Information Technology
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• v.8 no.4
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• pp.99-108
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• 2018

This study regards the savoring, emotion and happiness of 232 equestrians who participated in leisure sports horse riding. First, exploratory factor analysis and confirmatory factor analysis were conducted to extract the main variables and to verify the validity of the study. Second, correlation analysis was performed to find out the correlation between major variables. Third, path analysis was performed to derive the final result of this study. In addition, we conducted a reliability analysis of major measurement tools to determine internal consistency(Conbach's ${\alpha}$) utilizing IBM SPSS 21.0 and IBM AMOS 21.0. The results show that past recall had a statistically significant negative impact on negative emotions and future expectations had a negative impact on positive emotions. Also, future expectations showed a statistically significant effect on euphoria and positive emotions had positive effects on happiness.

• The Transactions of the Korea Information Processing Society
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• v.3 no.6
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• pp.1483-1492
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• 1996

In this paper, related on the postal business with the GIS(Geographics Information System), it discusses design and implementation of the PROS(Postal Route Optimization System) model and its main module, the shortest path generation algorithm, for supporting to postal route managements. It explains examples requirements of postal route system, and suggests the efficient PROS model using our developed shortest path generation algorithm. Because the shortest path algorithm adopts not only consider the Dijkstra algorithm of graph theory, but also the method with the direction property, PROS can be implemented with fast and efficient route search. PROS is mainly constituted of the Shortest Generator, the Isochronal Area Generator, and the Path Rearrangement Generator. It also exploits the GIS engine and the spatial DBMS (Data Base Management System) for processing coordinates in the map and geographical features. PROS can be used in the management of postal delivery business and delivery area and route, and in the rearrangement of route. In the near future, it can be also applied to commercial delivery businesses, guides of routs and traffic informations, and auto navigation system with GPS(Global Positioning System).

• Science of Emotion and Sensibility
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• v.20 no.2
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• pp.73-86
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• 2017

The purpose of this study was to investigate the influence of consumers' shopping value(SV), ease of use(EOU), and usefulness(U) on their purchase intention(PI) in mobile shopping mall. Path hypotheses in structural equation model which was constructed for this purpose were verified. In addition, the research model was analyzed according to the groups classified by the level of purchase experience in mobile shopping mall. The survey was limited to the respondents in their 20s and 30s living in Seoul and other metropolitan areas who had purchased fashion products in mobile shopping mall. 411 useful data collected from on-line survey were analyzed by descriptive statistics, exploratory factor analysis, confirmatory factor analysis, reliability analysis, and pearson's correlation analysis using SPSS 21 and AMOS 19. The results of verifying the hypotheses were as follows: First, SV was composed of two factors which included hedonic shopping value(HSV) and utilitarian shopping value(USV). Second, the research model was verified as an acceptable model in explaining the influence of consumers' SV, EOU, and U on PI. Third, seven hypotheses among nine hypotheses were accepted in high purchasers. HSV did not have a significant influence on PI, and EOU did not affect PI significantly. Fourth, five hypotheses were accepted in light purchasers. HSV affected U significantly while USV had a significant impact on EOU and PI. EOU affected U, and U affected PI significantly. In conclusion, USV was proven to be the factor affecting PI directly as well as indirectly. Eou and U also had a significant influnce on PI in mobile fashion shopping. These results will provide mobile marketers with the differentiated strategies to make consumers lead to mobile purchase.

• Journal of Korean Academy of Nursing
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• v.25 no.2
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• pp.244-258
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• 1995

아기의 출생은 부모에게 환경적, 신체적, 정신적 부담을 준다. 이렇게 부모가 된 사람들은 부모역할 수행시 어려움을 겪고 있고, 그 중에서도 어머니가 아버지보다 역할수행시 더 많은 어려 움을 겪고 있다고 한다. 본 연구는 생후 8개월 된 아기 어머니들을 대상으로 역할이 론을 토대로 모성역할 획득에 영향을 주는 요인들로 가설적 모형을 구축하고, 이의 적합성을 검정하므로 써 어머니들의 모성역할 획득을 촉진하기 위하여 필요한 간호 정보를 제공하려고 한다. 본 연구는 문헌고찰을 통하여 모성역할 긴장과 모성역할 획득에 영향을 주는 요인으로 일상생활의 시간적 여유, 아기 기질, 사회적 지지가 포함되었고, 모성역할 긴장이 모성역할 획득에 영향을 주는 것으로 이론적 기틀을 구성하였다. 연구도구로는 모성역할 획득 중 모성 정체감을 측정하기 위해 Osgood(Walker et al., 1986a에서 인용)도구, 모성역할 수행을 측정하기 위해 수정보완 된 Gibaud-Wallston(1977)도구와 어머니가 지각한 모아 상호작용정도 도구를 이용하였고, 모성역할 긴장측정에는 수정 보완된 Hobbs(정, 1985에서 인용)도구를 이용하였다. 아기 기질은 수정 보완한 The degree of thor inventory(Mercer, 1986 에서 인용), 남편의 정신적지지 측정은Taylor(Durrett, 1986에서 인용)의 도구를 이용하였고, 일상생활의 시간적 여유, 남편의 신체적 지지 및 주위의 지지측정은 연구자가 개발한 도구를 사용하였다. 1993년 1월부터 1994년 1월까지 대전시 5개 보건소에 등록된 대상자들에게 우편으로 설문지를 보내어 221명이 회수되어 회수율이 약72%였다. 일반적인 서술적 자료 분석은 SPSS PC+ 를 이용하였고, 가설적 모형은PC-LISREL 7.13 (Joreskkog & Sorbom,1988)프로그램을 이용하여 공변량구조분석을 하였다. 연구결과는 다음과 같다. 모성역할 획득에 모성역할 긴장, 일상생활의 시간적 여유, 아기 기질, 사회적 지지가 영향을 주며, 모성역할 긴장에는 일상생활의 시간적 여유, 아기 기질, 사회적지지가 영향을 준다고 설정된 가설적 모형〈Figure 1〉의 분석 결과 전반적 지수는 자유도 23에 카이자승치 60.17, GFI와 AGFI의 값은 .944, .891였고, NFI와 NNFI의 값은 .8823, .7932 이었다. 그러나 세부적 지수 중 모성역할 긴장에서 모성역할획득으로의 경로, 일상생활의 시간적 여유에서 모성역할 획득으로의 경로, 아기 기질에서 모성역할 획득으로의 경로의 고정지수가 절대치 2에 미치지 못하여, 세 경로계수를 영(0)으로 고정시킬 필요가 있었다. 따라서 더 간명하며 부합도가 좋은 모형을 찾기 위하여 가설적모형에서 고정지수가 낮은 경로 부터 고정시켜 나가 세경로(모성 역할 긴장에서 모성역할 획득, 일상생활의 시간적 여유에서 모성역할 획득, 아기 기질에서 모성역할획득)를 고정시킨 수정 모형 의 PFI (간명도)가 .5986으로서 가설적모형의 PFI(간명도) .5636보다 커 부합도 를 손상하지 않고 더 간명한 모형으로 나타났다. 수정모형 의 고정 지수를 살펴 본 결과 절대 치 2에 미치지 못하는 경로는 나타나지 않았다. 공변량구조분석 결과 나타난 변인간의 관계를 보면 가) 모성역할 긴장은 사회적 지지가 많을수록(Lisrel Estimates=-1.591), 아기 기질이 순하다고 생각할수록(Lisrel Estimates=-.266), 일상생활의 시간적 여유가 많을수록(Lisrel Estimstes=-1.771) 낮았고, 나) 모성역할 획득은 사회적 지지가 많을수록(Lisrel Estimates=1.120) 잘 되었다.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.26 no.1
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• pp.217-231
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• 2015

This study aims to infer the gene-protein 'brings_about' chains of pancreatic cancer which were referred to in the pancreatic cancer related researches by constructing the gene-protein interaction network of pancreatic cancer. The chains can help us uncover publicly unknown knowledge that would develop as empirical studies for investigating the cause of pancreatic cancer. In this study, we applied a novel approach that grafts text mining and the main path analysis into Swanson's ABC model for expanding intermediate concepts to multi-levels and extracting the most significant path. We carried out text mining analysis on the full texts of the pancreatic cancer research papers published during the last ten-year period and extracted the gene-protein entities and relations. The 'brings_about' network was established with bio relations represented by bio verbs. We also applied main path analysis to the network. We found the main direct 'brings_about' path of pancreatic cancer which includes 14 nodes and 13 arcs. 9 arcs were confirmed as the actual relations emerged on the related researches while the other 4 arcs were arisen in the network transformation process for main path analysis. We believe that our approach to combining text mining analysis with main path analysis can be a useful tool for inferring undiscovered knowledge in the situation where either a starting or an ending point is unknown.

• Economic Analysis
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• v.27 no.4
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• pp.43-69
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• 2021

As the trade linkages and the financial relationship between China and Korea grow stronger, China's influence on Korea is also growing larger. Therefore, it is meaningful to examine key features of Chinese monetary policy operations and the current situation, and to analyze the transmission mechanism of China's monetary policy shocks onto the Korea economy. China's monetary policy shocks can have an impact on the Korea economy through the trade, financial and oil-price channels. In the trade channel, an expansionary Chinese monetary policy can increase Korea's exports of intermediate goods to China under the vertical trade structure, via the vertical trade integration effect. Meanwhile, the expenditure switching effect and the income demand effect show no statistical significance. In the financial and oil-price channels, expansionary Chinese monetary policy shocks can decrease the interest rate and increase both stock prices and the consumer price index in Korea through changes in global portfolio capital flows, interest rates, and raw material prices.

• Journal of the Economic Geographical Society of Korea
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• v.16 no.4
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• pp.613-630
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• 2013

This study attempts to analyze the spatial characteristics of organic agriculture in Korea during the period of 2000~2010, focusing on women's labor contribution to agricultural operations. Spatial distribution and concentration of organic farming have been investigated using Location Quotient(LQ) and Local Indicator of Spatial Association(LISA), it was found that the specialized organic farmland in the Seoul Metropolitan area has decreased significantly over the past decade, while in Chungnam and Kyungpook province it has been rapid growth in the same period. Multilinear regression analysis was also carried out to find out whether the spatial clusters in organic farming depends on women farmers. Results describing the correlation between organic farming and women farmers within identified clusters suggest that the possibility of the transition towards sustainable agriculture and farmland restructuring in Korea, by women.

• Journal of the Korean Institute of Intelligent Systems
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• v.16 no.2
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• pp.185-190
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• 2006

Most systems in ubiquitous computing analyze context information of users which have similar propensity with demographics methods and collaborative filtering to provide personalized recommendation services. The systems have mostly used static context information such as sex, age, job, and purchase history. However the systems have limitation to analyze users' propensity accurately and to provide personalized recommendation services in real-time, because they have difficulty in considering users situation as moving path. In this paper we use users' moving path of dynamic context to consider users situation. For the prediction accuracy we complete with a path completion algorithm to moving path which is inputted to RSOM. We train the moving path to be completed by RSOM, analyze users' moving pattern and predict a future moving path. Then we recommend the nearest product on the prediction path with users' high preference in real-time. As the experimental result, MAE is lower than 0.5 averagely and we confirmed our method can predict users moving path correctly.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2801-2803
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• 2001

전자상거래 사이트 내에서 제공되는 정보가 많아질수록 사용자는 많은 실패를 거친 후 자신이 원하는 정보에 도달하게 된다. 사용자가 어떤 사이트에 자주 찾아오도록 하기 위해서는 적은 노력으로도 원하는 정보에 도달할 수 있도록 도움을 주는 웹 페이지 추천기법이 필요하다. 이 기법은 사용자 프로파일 중 경로 정보의 패턴을 분석한 후 분석된 결과를 바탕으로 사용자에게 현재 있는 페이지와 가장 연관성이 높다고 판단되는 웹 페이지를 연관규칙을 응용한 방법을 이용하여 추천한다.