• The Journal of Society for e-Business Studies
• /
• v.25 no.4
• /
• pp.125-141
• /
• 2020

Recent Studies emphasize the effect of investors attention, recognition and sentiment on the trading behavior of retail investors and stock price variation. In this study, we use Naver Trend to measure investors'attention and investigate the relation between investor attention and price synchronicity, total risk and systematic risk of stocks. Using various research methodologies such as portfolio analysis, fixed effect regression and dynamic panel analysis, we find consistent results. First, stock price synchronicity is increased with lager average search volume, but with less search variability. Second, both average search volume and its variability are positively related to total risk and beta of stocks. These results can be interpreted that search volume sharply increases only when stock-related event occurs.

• Journal of Information Management
• /
• v.36 no.4
• /
• pp.91-115
• /
• 2005

While the amount of information exchanged through internet has dramatically increased recently, certain inefficiencies still exist with regard to the storage, distribution, and retrieval of information. As a means of improving efficiency in accessing information, many search portals provide directory services to present organized guidance to information, based on the classification schemes. This study examines the classification activities practiced by the major search portals in Korea and makes some suggestions to improve the quality of directory services.

• The Journal of Society for e-Business Studies
• /
• v.22 no.2
• /
• pp.153-168
• /
• 2017

Recent studies focus on the role of investor attention and transparency in stock-related information in explaining stock return and trading volume. Moreover, recent literatures predict that firm opacity will increase the likelihood of future stock price crashes. In this paper, we investigate, using Naver Trend, the relation between portal search intensity and stock price crash. Using various alternative measures of stock price crash risk and search intensity, we demonstrate that stocks with larger volume of portal search are less likely to experience stock price crashes. These results are consistent with our hypothesis that accumulated firm opacity cause future stock price crash. Finally, our results still hold even after we control for the potential effect of endogeneity in the regression specifications.

• Journal of Information Management
• /
• v.37 no.2
• /
• pp.137-156
• /
• 2006

To evaluate the performance of the question and answer services provided through the internet portals in Korea, question and answer transcript of four major services were sampled systematically. Using the digital reference evaluation framework, number and types of questions, response rate, timeliness, accuracy for information questions and user satisfaction were measured and analyzed. The level of the service performance is identified and compared. The conclusion includes suggestions for service improvement.

• 한국경영정보학회:학술대회논문집
• /
• 2008.06a
• /
• pp.595-603
• /
• 2008

오늘날 인터넷을 통한 정보검색이 일상화되면서 생활상식에서부터 기존에 서적이나 논문 등을 통해서만 알 수 있었던 전문지식까지도 손쉽게 찾을 수 있게 되었다. 즉, 현대생활에 있어서 검색엔진은 원하는 정보를 빠르고 정확하게 찾을 수 있게 해준다는 점에서 매우 중요하다고 할 수 있다. 하지만 이러한 중요성에도 불구하고 검색엔진 기술적인 연구이외에는 서비스 품질이나 고객만족에 대한 연구는 활발하게 이루어지지 않고 있다. 따라서, 본 연구에서는 검색엔진 서비스에 있어서 서비스 품질과 서비스가치, 고객만족, 충성의도의 관계를 연구모형으로 설정하고 이들간의 관계를 분석하였다. 그 결과 서비스품질의 정확성, 정보함유량, 사이트 이미지, 편리성이 서비스가치에 정(+)의 영향을 미치는 것으로 나타났으며, 그중에서 정확성, 사이트 이미지, 신뢰성은 고객만족에도 정(+)의 영향을 미치는 것으로 나타났다. 또한 서비스가치가 높을수록 고객만족은 상당히 높아지는 것으로 나타났으며 고객만족이 충성의도에 많은 영향을 주는 것으로 나타났다. 본 연구의 결론은 검색엔진 서비스 기업이 경쟁우위를 유지하기 위해서는 서비스가치의 구현을 통한 지속적인 고객만족을 달성해야 하며, 이를 위해 정확성, 정보함유량, 편리성, 사이트 이미지에 중점을 둔 고품질 서비스 전략의 필요성을 시사하고 있다.

• Journal of Korea Multimedia Society
• /
• v.11 no.11
• /
• pp.1601-1614
• /
• 2008

The number of web service users has been increased rapidly as existing services are changed into the web-based internet applications. Therefore, it is necessary for us to use web log pre-processing technique to detect attacks on diverse web service transactions and it is also possible to extract web mining information. However, existing mechanisms did not provide efficient pre-processing procedures for a huge volume of web log data. In this paper, we proposed both a field based parsing and a high-speed log indexing mechanism based on the suggested B-tree Index Vector structure for performance enhancement. In experiments, the proposed mechanism provides an efficient web log pre-processing and search functions with a session classification. Therefore it is useful to enhance web attack detection function.

• Journal of Industrial Convergence
• /
• v.20 no.4
• /
• pp.31-37
• /
• 2022

Research on what factors affect the success of the movie market is very important for reducing risks in related industries and developing the movie industry. In this study, in order to find out the degree of correlation of independent variables that affect movie performance, a survey was conducted on film experts using the AHP method and the importance of each measurement factor was evaluated. In addition, we hypothesized that factors derived from big data related to search portals and SNS will affect the success of movies due to the increase in the spread and use of smart phones. And a prediction model that reflects both the expert survey information and big data mentioned above was proposed. In order to check the accuracy of the prediction of the proposed model, it was confirmed that it was improved (10.5%) compared to the existing model as a result of verification with real data.Therefore, it is judged that the proposed model will be helpful in decision-making of film production companies and distributors.

• Journal of Digital Convergence
• /
• v.16 no.12
• /
• pp.335-342
• /
• 2018

The search service, which is a core service of the portal site, presents search queries that are rapidly increasing among the inputted search queries based on the highest instantaneous search frequency, so it is difficult to immediately notify a search query having a high degree of interest for a certain period. Therefore, it is necessary to overcome the above problems and to provide more intelligent information retrieval service by bringing improved analysis results on the change of the search queries. In this paper, we present the criteria for measuring the interest, continuity, and attention of real-time search queries. In addition, according to the criteria, we measure and summarize changes in real-time search queries in hours, days, weeks, and months over a period of time to assess the issues that are of high interest, long-lasting issues of interest, and issues that need attention in the future.

• The Journal of Society for e-Business Studies
• /
• v.14 no.4
• /
• pp.59-73
• /
• 2009

Keyword extraction is an important and essential technique for text mining applications such as information retrieval, text categorization, summarization and topic detection. A set of keywords extracted from a large-scale electronic document data are used for significant features for text mining algorithms and they contribute to improve the performance of document browsing, topic detection, and automated text classification. This paper presents a keyword extraction technique that can be used to detect topics for each news domain from a large document collection of internet news portal sites. Basically, we have used six variants of traditional TF-IDF weighting model. On top of the TF-IDF model, we propose a word filtering technique called 'cross-domain comparison filtering'. To prove effectiveness of our method, we have analyzed usefulness of keywords extracted from Korean news articles and have presented changes of the keywords over time of each news domain.

• KIISE Transactions on Computing Practices
• /
• v.22 no.5
• /
• pp.246-251
• /
• 2016

Recently, the influence of SNS and online media is rapidly growing with a consequent increase in the interest of marketing using these tools. Blog marketing can increase the ripple effect and information delivery in marketing at low cost by prioritizing keyword search results of influential portal sites. However, because of the tough competition to gain top ranking of search results of specific keywords, long-term and proactive efforts are needed. Therefore, we propose a new method that recommends associated keyword groups with the possibility of higher exposure of the blog. The proposed method first collects the documents of blog including search results of target keyword, and extracts and filters keyword with higher association considering the frequency and location information of the word. Next, each associated keyword is compared to target keyword, and then associated keyword group with the possibility of higher exposure is recommended considering the information such as their association, search amount of associated keyword per month, the number of blogs including in search result, and average writhing date of blogs. The experiment result shows that the proposed method recommends keyword group with higher association.