• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.4
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• pp.1887-1898
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• 2018

In this paper, a method to classify insider threat activity is introduced. The internal threats help detecting anomalous activity in the procedure performed by the user in an organization. When an anomalous value deviating from the overall behavior is displayed, we consider it as an inside threat for classification as an inside intimidator. To solve the situation, Markov Chain Model is employed. The Markov Chain Model shows the next state value through an arbitrary variable affected by the previous event. Similarly, the current activity can also be predicted based on the previous activity for the insider threat activity. A method was studied where the change items for such state are defined by a transition probability, and classified as detection of anomaly of the inside threat through values for a probability variable. We use the properties of the Markov chains to list the behavior of the user over time and to classify which state they belong to. Sequential data sets were generated according to the influence of n occurrences of Markov attribute and classified by machine learning algorithm. In the experiment, only 15% of the Cert: insider threat dataset was applied, and the result was 97% accuracy except for NaiveBayes. As a result of our research, it was confirmed that the Markov Chain Model can classify insider threats and can be fully utilized for user behavior classification.

• Journal of Advanced Navigation Technology
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• v.13 no.2
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• pp.287-295
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• 2009

These days, information technology is rapidly changing our society. Thus, considering such a business environment, many companies are seeking revenue models for successful business. In particular, digital content with the convergence of culture and information technology create revenue for businesses. For this reason, many companies are interested in UGC (User Generated Content), which refers to various kinds of publicly accessible media content that are produced by end-users. Thus, this paper analyzed the attributes of UGC and businesses using ubiquitous technology. From this analysis, this paper shows the critical success factors for UGC in ubiquitous business environments. In addition, this paper analyzed the attributes of UGC through the research of literature reviews and expert reviews. Based on this research, many companies are encouraged to develop successful digital content generated by end-users.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.582-591
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• 2007

지금까지 HCI분야의 많은 연구들은 사용성 (Usability)을 중요한 연구 주제로 인식하여 왔다. 그러나 연구의 범위를 사용성에 한정하는 것은 HCI 분야의 잠재성을 좁히고, 사용자 경험 (User Experience)의 개념도 좁은 범위로 한정시키게 된다. 따라서 향후 HCI 분야의 연구는 정보 기술의 사용성 측면의 뿐만 아니라, 정보 기술의 사용을 통한 다양한 사용자 경험을 구조적인 관점에서 살펴보아야 한다. 즉 사용성 중심의 연구가 아닌, 보다 전반적이고 구조적인 측면에서 사용자 경험을 살펴보는 새로운 방향의 HCI 연구가 필요할 것으로 보인다. 이와 같이 사용자 경험을 보다 전반적이고 구조적인 측정에서 이해하기 위해서는 사용자가 특정 정보 기술의 사용을 통해 추구하는 가치 (Value)와 그와 같은 가치를 실현 시킬 수 있는 정보 기술의 속성 (Attribute) 및 결과 (Consequence), 그리고 속성, 결과, 가치 간 연관 관계를 구조적인 측면에서 살펴보아야 한다. 본 연구는 사용자 가치에 대한 대표적인 이론인 Means-End Chain Theory와 속성, 결과, 가치 간 연관 관계를 파악하기 위한 정성적 연구 방법론인 Laddering 기법을 기반으로 사용자 경험 구조 파악 및 가치 중심적 HCI (Value-Centered HCI)를 위한 새로운 연구 방법론을 제안하고자 한다. 또한 본 연구에서는 새롭게 제안된 방법론을 통해 모바일 인터넷 서비스에 대한 사용자 경험 구조를 도출하고, 모바일 인터넷 상황에서 도출된 결과 및 본 연구에서 새롭게 제안된 방법론의 이론적이고 실용적인 의의를 제시하고자 한다.

• Journal of the Korean housing association
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• v.25 no.3
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• pp.165-179
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• 2014

The purpose of this study was to draw application elements of housing interior design according to user-oriented sensibility types. The sensibility evaluation experiments were conducted to target the general user 118 people using the sensibility evaluation tool for housing interior space. The results of the analysis were as: To produce the 'cozy' space, the colors and materials giving soft and natural feeling should be used. For the 'practical' space, type of ceiling and window that give the visually open feeling, the user-oriented furniture arrangement that allows using the space efficiently. For the 'cheerful' space, the simple and natural effects should be produced by using closed space that stable. For the 'traditional' space, the natural fishing material having rough texture should be used. For the 'unique' space, the space contained the dynamic feeling by the diagonal or vertical line and the graphic expression in the wall. For the 'congenial' emotional space, basic is the symmetric, stable and simple space. On the other hand, for the material, small size, natural texture or typical and soft materials should be used. For the 'sensuous' space, the dynamic and vertical sense of space should be expressed by the type of ceiling. The most important elements for the space of 'gorgeous' sensibility, is the color.

• Asia pacific journal of information systems
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• v.8 no.2
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• pp.1-18
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• 1998

As the management and preservation of the environment become an important social issue, information required to support environmental task is required. So, there is an increasing demand for environmental information and appropriate systems to manage it. The vast volume of environmental data is distributed in different knowledge domains and systems. Environmental data objects have the complex structure containing environmental quality data and attribute data. Environmental information systems must be able to address these properties. This research has aimed at constructing well-defined schema design of environmental data, and making system architecture that environmental data kept by authorities should be made available to the public user. There are 3 major components in environmental information systems architecture ; User interface, Catalog libraries, Communication Provider. Web browsers provide consistent and intuitive user interfaces on Internet. The communication provider is a collection of diverse CGI functions. The main roles of the CGIs are to build interfaces between the Web, databases. Catalog libraries is libraries of various matadata including administration matadata. Administration matadata support the environmental administration and the managerial aspects of environmental data rather than explain a database itself or its properties.

• Journal of the Korean Society for information Management
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• v.38 no.2
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• pp.173-199
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• 2021

In this study, in order to understand the characteristics of the users' information needs for each public library unit, the user needs were analyzed based on the various attribute information of the books loaned to 11 public libraries in 8 districts in Seoul. As a result, the prominent book use patterns of the libraries were revealed, specifically related to the target user groups, purpose/motivation, interests/preferences, book genre, and subject. In addition, there was a preference for authors, and a difference in the role of the preferred authors in each library was also revealed. The results of this study will help to provide guidelines for the development of differentiated collections and service programs based on user needs.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.3
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• pp.1315-1329
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• 2018

Ciphertext-policy attribute-based encryption (CP-ABE) associates ciphertext with access policies. Only when the user's attributes satisfy the ciphertext's policy, they can be capable to decrypt the ciphertext. Expressivity and security are the two directions for the research of CP-ABE. Most of the existing schemes only consider monotonic access structures are selectively secure, resulting in lower expressivity and lower security. Therefore, fully secure CP-ABE schemes with non-monotonic access structure are desired. In the existing fully secure non-monotonic access structure CP-ABE schemes, the attributes that are set is bounded and a one-use constraint is required by these projects on attributes, and efficiency will be lost. In this paper, to overcome the flaw referred to above, we propose a new fully secure non-monotonic access structure CP-ABE. Our proposition enforces no constraints on the scale of the attributes that are set and permits attributes' unrestricted utilization. Furthermore, the scheme's public parameters are composed of a constant number of group elements. We further compare the performance of our scheme with former non-monotonic access structure ABE schemes. It is shown that our scheme has relatively lower computation cost and stronger security.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2010.04a
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• pp.121-123
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• 2010

Currently different local governments and research institutes have established and using DB for each purposes on the heterogeneous database. Normally physical unification method is used in order to unify this geospatial database, but this takes too much time and resources and require periodic renewal and synchronization. Therefore, this research would like to present a logical integrated unification method based on attribute information of heterogeneous database, and a system design and construction method, in order to subjugate inefficiencies from the physical unification method. Through this a system that could supply user customized geospatial database was established and verified the functionality using the road data of an actual region.

• The KIPS Transactions:PartA
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• v.11A no.2
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• pp.149-158
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• 2004

XML as a standard for representing data and document structure is widely used in every area, and we have to write XML compilers which process the XML documents according to a user's intention. Because it takes time and costs to write XML compilers by hand, we need some generators that automatically generate XML compilers. In this paper, we introduce an XML compiler generator named XCC. It reads DTD and semantic rules, and it generates XML compiler and Java classes which correspond to the elements defined in the DTD.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.18 no.4
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• pp.415-421
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• 2000

The purpose of this study is to develop the AM/FM system for a university using internet GIS. Because the developed system has an additional Java Applet functions, web user can execute dynamic data processing including static HTML GUI. The developed internet AM/FM system could be used for effective management work exact search and inquiry of both graphic information and attribute information rapidly. Also, it has the functions of mapping, attribute and spatial information searching, spatial query processing, etc.. Besides, this system could be used for realtime facility in any place or office using internet.