• Journal of Korea Society of Industrial Information Systems
• /
• v.21 no.5
• /
• pp.73-83
• /
• 2016

NAVER provides search frequency data of search terms via its DataLab service (http://datalab.naver.com/). Using this data, this paper examines the relation between the search frequency of firm's name and its future stock returns. Our results show that the search frequency of firm's name is a new investor attention measure, which is different from previously explored attention measures such as extreme returns, turnover, etc. Firms that go through higher search frequency this week tend to have higher returns in the next week. We do not find return reversal in the long run for the firms with higher search frequency. Furthermore, the extent to which search frequency affects stock returns becomes more pronounced following market-wide attention grabbing events. Our results indicate that search frequency incorporates information for future stock returns.

• Journal of the Korean Society for information Management
• /
• v.21 no.4 s.54
• /
• pp.209-231
• /
• 2004

The purpose of this study is to examine the current state of illegal distribution of literary works on internet cafes and homepages, and figure out how to protect the rights of copyright holders. For this study, examined were the cafes and menus of homepages of major Websites on the Internet, where illegal copying and delivery of literary works could happen. For each Website, the volumes of the entire collection, the number of literary works held, the maximum and average number of transactions were investigated, and literary works categorized according to genres were analyzed. The result shows that the strict legislation and regulation by government or copyright organizations could hinder the positive distribution of awareness about the copyright : but, still strongly needed is the promotion and education of the importance of copyright to help the public understand better. Providers of portal services should take a proper step to strengthen the training of and systematic support for copyright-related issues for both operators and users of cafes and homepages on Websites.

• Proceedings of the Korea Association of Information Systems Conference
• /
• 2003.05a
• /
• pp.169-181
• /
• 2003

As growth of the web-based applications, the requirements of the users who have been very familiar to the web-based user interfaces and customer-oriented services on the Internet would become more knowledge-intensive and higher technology involved in a more convenient and polite way of service delivery. Therefore, the service quality of information system department should be considered as a very important factor influencing success of information systems. The objective of this study is to provide the relationship between service quality of IS department and its impacts such as use, user satisfaction and job performance. For this purpose, we provide a research model for it and test it empirically for the users of the corporate portal in one of main telecommunication service providers in Korea. In result, our model with satisfiable validity and reliability shows not only importance of IS departments' service quality but also two-faced characteristics of service quality. That is, while technical competence which means with knowledge and expertise of IS department staffs is more related with user satisfaction on information systems, personal service which means the way and manner of service delivery is more related with use of it.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.6 no.4
• /
• pp.595-603
• /
• 2002

In this research, it has been shown that how the computer can recognize and understand spoken natural language and its symbolization using VoiceXML and Grammar Specific Language in developing telephone based conversational automatic speech recognition flight information system. In order for user to hear correct information, ASP Module has been revised and its effectivities has been experimented on the Voice portal airplane information system platform.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2013.05a
• /
• pp.136-138
• /
• 2013

In this paper, we investigate on overall trends and movements in e-learning performance at University. And system developed a e-learning platform consisting of smart phone portal, learning management system(LMS), and learning content management system(LCMS). Throughout the experiment, each of the components of the e-learning were implemented.

• Proceedings of the Korean Information Science Society Conference
• /
• 2006.10b
• /
• pp.58-61
• /
• 2006

대량으로 존재하는 웹자원에 대한 디렉토리 및 검색서비스를 제공하는 포털서비스로의 집중화 현상이 계속해서 심화되고 있다. 상대적으로 주소를 통한 자원으로의 접근은 약화되고 있다. 포털서비스와 접근수단 그리고 최종 목적지인 콘텐츠사이트 간의 확률적 모델을 통하여 포털사이트로의 집중화 현상이 콘텐츠 접근 모델에 있어서의 구조적인 특징에 기인함을 알 수 있었다. 많은 이용자들이 시작페이지로 포털사이트를 설정하고 있고, 주소를 입력 할 때는 주소창 보다는 포털의 검색창에 입력하고 있음으로 해서 포털서비스가 주소서비스를 대체하고 있다.

• Journal of Digital Convergence
• /
• v.5 no.2
• /
• pp.59-70
• /
• 2007

Recently, rising of the convergence of technologies such as IT, GIS, GPS, and Sensors is developing the new information environment which enables man-to-man, man-to-object and object-to-object to exchange information anywhere and anytime. The Korean government has made great efforts to implement the virtual government with development of the next generation technologies continually and dynamically. These efforts for implementing e-government can be summarized by the citizen centered, integrated services, the customized personalization, the intellectual services, and the integration and cooperation between each offices for providing those services. Therefore, we wish to present the model of wide-area intelligent information systems which can provide services to form the future of this virtual government with GIS infrastructure in this study.

• Annual Conference of KIPS
• /
• 2014.04a
• /
• pp.1038-1040
• /
• 2014

최근 스마트폰과 테블릿 PC의 보급률이 증가하면서 사용자들이 얻을 수 있는 정보 또한 급증하고 있다. 하지만 과도한 정보 공급으로 사용자들은 제공받은 정보를 효율적으로 활용하지 못하는 경우도 늘고 있는 추세이다. 기존의 시스템은 단순히 사용자나 정보 제공자가 입력한 정보만 제공하는 수동적인 역할만 하며 이는 효과적인 정보를 얻는데 한계가 있다. 이런 문제점을 해결하기 위해 본 논문에서는 사용자의 주변 상황정보와 추론엔진을 이용해 사용자가 필요로 하는 정보를 보다 효과적으로 제공해 줄 수 있는 사용자 친화적 생활 포털 시스템을 제안한다. 본 논문에서 제안하는 생활 포털 시스템을 통해 사용자는 본인이 원하는 정보를 효율적이고 효과적으로 활용할 수 있다.

• Annual Conference of KIPS
• /
• 2009.11a
• /
• pp.345-346
• /
• 2009

The segmentation of vessel including portal vein, hepatic vein and artery, from Computed Tomography (CT) images plays an important role in the therapeutic strategies for hepatic diseases. Representing segmented vessels in three dimensional spaces is extremely useful for doctors to plan liver surgery. In this paper, proposed method is focused on smoothing technique of segmented 3D liver vessels, which derived from 3D region growing approach. A pixel expand algorithm has been developed first to avoid vessel lose and disconnection cased by the next smoothing technique. And then a binary volume filtering technique has been implemented and applied to make the segmented binary vessel volume qualitatively smoother. This strategy uses an iterative relaxation process to extract isosurfaces from binary volumes while retaining anatomical structure and important features in the volume. Hard and irregular place in volume image has been eliminated as shown in the result part, which also demonstrated that proposed method is a suitable smoothing solution for post processing of fine vessel segmentation.

• Journal of Korea Port Economic Association
• /
• v.29 no.3
• /
• pp.73-94
• /
• 2013

The necessity of shipping market information services has been on the rise which emphasizes the relevance of transaction information and market information to parties both in and outside the shipping industry. However, previous related researches have been restricted to explorations limited by the offerings of existing shipping market information providers. Users today require effective information, an efficient contents management system, interfacing to help the information provider, graphing and spread sheets to facilitate and present the analyzed information through diverse formats, and reliable web and mobile services to provide information effectively with limited human resources. As a first step, service information has to be defined, so that it takes into account user utility, information retrieval and data development. Second, benchmark information and services must be provided from leading shipbrokers and research institutes. Third, a review of the latest technical trends is required to identify the most suitable technologies for servicing shipping market information. Finally, analysis is required on the implementation of a system with selected technologies, as well as the development of channels to post information which have been analyzed by users. Such a process would enable the continual redefinition of the shipping market information users actively need. The application of an X-Internet based WCMS, with a single-window dashboard providing user-customized information, and used to obtain and manage processes, add spread sheets to sustain calculations using the latest information, graph results, and to input additional information following predefined rules. Access to data and use of the system would require agreement that the system will incorporate user data and user-analyzed information into the market report, web portal, and hybrid app to provide current shipping market information appropriately and accurately to service users.