• Journal of Korea Society of Industrial Information Systems
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• v.16 no.3
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• pp.35-45
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• 2011

Due to people's internet use growth and proliferation of ubiquitous technology, the internet addiction is becoming a social issue. However, the current adults' self-diagnosis measure about internet addiction, the K-scale, is a normal diagnostic method, which it does not consider user characteristics. In this research, we will propose a new internet addiction diagnostic method based on users' non-duty internet activities by using some questionnaire items to collect users' basic internet patterns used on duty related or non-duty related web sites. Since we simply ask for the basic internet usage pattern to each user who does not like to check frankly questionnaire items in the K-scale, the proposed method can find some hidden internet addicts compared to the K-scale with the SPSS statistical analysis tool.

• Journal of the Korean housing association
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• v.5 no.2
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• pp.129-139
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• 1994

This study is primarily concerned with the apartment house manager's duty of korea and England. The results are as follows ; 1. In England, detailed duty is prescribed to apartment house managers, where as Korea has not specific prescription. Therefore, we suggest 7 items as the management duty of apartment house manager. Namely, that is inhabitant management, external duty management, business management, account management, estate and public institution management, environment management and safety management. 2. In England, apartment house manager is executing their duty before moving into. But in Korea, their management duty is executed after moving into. There are problems which each of them(inhabitant-user-manager) has plural responsibility.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.854-857
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• 2008

Wireless sensor consists of an internal power source which has limited life time. Several MAC protocols have exploited scheduled sleep/listen cycles to conserve energy in sensor networks. Duty cycle is a user-adjustable parameter in low duty cycle MAC protocols, which determines the length of the sleep period in a frame. The sire of duty cycle has direct effect on the Performance of MAC Protocols. In this Paper, we simulated TEEM (A Traffic Aware, Energy Efficient MAC) and S-MAC in NS-2 with different duty cycle values and analyze how duty-cycle effects on the performance and energy consumption of both the protocols.

• Journal of the Korean Society for Library and Information Science
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• v.50 no.3
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• pp.215-247
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• 2016

This study was performed in order to derive components that librarians think preferentially necessary and realistically important when applying the NCS 'Library and Information Administration's duty' to the library working environments. It was possible by evaluating and analyzing the importance and utilization of ability unit and its element which are the components of NCS 'Library and Information Administration's duty'. First, ability units of 'User Information Services', 'Reading and Culture Programs' were higher in importance and utilization at the same time. Ability units of 'Library and Information Practical Research Perform', 'Library and Information Curation', 'Library and Information System Operation' were lower in importance and utilization when we evaluate the importance and utilization of ability unit and its element which are the components of NCS 'Library and Information Administration's duty'. Second, components of 'Reading and Culture Programs', 'User Information Service', 'Library and Information Collection' were higher in the order, and components of 'Library and Information Curation', 'Library and Information System Operation', 'Library and Information Practical Research Perform' were found lower in demands as the desirable level and the current level appear less common when we analyzed the demands on the duty components utilizing Borich requirements analysis model. Third, six ability units of 'Reading and Culture Programs', 'User Information Services', 'Library and Information Collection', 'Library and Information Services Marketing', 'Library and Information Preservation', 'Library and Information Use Analysis' were derived as priority components when we analyzed the priority of the duty component (ability unit) utilizing The Locus for Focus model.

• Korea Journal of Hospital Management
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• v.7 no.2
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• pp.80-98
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• 2002

The purpose of this study was to investigate user satisfaction at Defense Medical Information System as it has been utilized as a part of National Defense Information Strategies since Aug. 2000. The subjects of this study were nurse officers and army surgeons of a hospital with 1,000 beds. The results of this study are as follows; First, according to the characteristics of the subjects, there was statistically significant difference in system satisfaction, job satisfaction and information satisfaction at Military Hospital Information System. Second, according to the intention of participation, there was a statistically significant difference in user satisfaction at Military Hospital Information System. Third, according to a level of dexterity at Military Hospital Information System, there was statistically significant difference only in job satisfaction. Fourth, factors to influence system satisfaction were one's duty, using period of Military Hospital Information System, and a level of dexterity at Military Hospital Information System. Factors to influence job satisfaction were a level of dexterity at Military Hospital Information System, one's duty and intention of participation. Factors to influence information satisfaction were one's duty, a level of dexterity at Military Hospital Information System, and intention of participation. As the first study on user satisfaction at Military Hospital Information System, this study suggests the followings. First, a plan to inspire users with intention of participating in information system should be prepared. Second, it is necessary to provide policy activities for job standardization of Military Hospital Information System and legal system improvement.

• Journal of the Korea Society of Computer and Information
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• v.15 no.11
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• pp.163-171
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• 2010

RBAC(Role-Based Access Control) has advantages in managing access controls, because it offers the role inheritance and separation of duty in role hierarchy structures. Delegation is a mechanism of assigning access rights to a user. RBDM0 and RDM2000 models deal with user-to-user delegation. The unit of delegation in them is a role. However, RBAC does not process delegation of Role or Permission effectively that occurs frequently in the real world. This paper proposes a Time Constraints Permission-Based Delegation Model(TCPBDM) that guarantees permanency of delegated permissions and does not violate security principle of least privilege and separation of duty. TCPBDM, based on the well-known RBAC96, supports both user-to-user and role-to-role delegation with time constraints. A delegator can give permission to a specific person, that is delegatee, and the permission can be withdrawn whenever the delegator wants. Our model is analyzed and shown to be effective in the present paper.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.4
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• pp.57-66
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• 2011

We implemented the document DRM applying role based access control(RBAC) mechanism for preventing the information leakage of a document which is transmitted in network environment. It must prevent to access document not related to user role and duty, and must allow operation to document for improving security, considering user role and security level according to a document importance. We improved the security of document DRM by adding to the access control module applying RBAC for satisfying security requirements. Though the user access document, our system allows operation authorizations to document by the user's role & security level and the security attribute of RBAC. Our system prevents indiscriminate access to the documents by user who is not associated with the role, and prevents damage the confidentiality and integrity.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.10 no.3
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• pp.49-62
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• 2000

Role-Based Access Control(RBAC) has recently received considerable attention as a alternative to traditional discretionary and mandatory access control to apply variant organizations function hierarchy of commercial or govemment. Also RBAC provides a delegation that is one of control principles in organization. In general delegation occurring in real organization is performed by an user giving permissions to another user. But, RBAC cannot implement these user-level delegation correctly. And delegation result in security problem such as destroying separation of duty policy information disclosure due to inappro-priate delegation. Besides security adminsitrator directly deals with that problem. In this thesis we suggests some methods that is created by the user.

• Journal of the Korea Society of Computer and Information
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• v.27 no.3
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• pp.165-171
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• 2022

In this paper, we suggest the Measures to improve the Act Bill for establishing the Game User Committee. The Act Bill has a lot of problems which are violations of criminal legalism due to unclear terms in administrative punishment and violations of The Human Right enjoying freedom of occupation and guaranting property due to not defining provisisons about The Duty of Confidentiality or The Legal Fiction as Public Officials for Purposes of Applying Penalty Provisions. also the duplicate regulations in the Act Bill disrupt game industry development. we have three results that were derived through analysis of Prior studies and precedents. The First is to define details of special reasons in enforcement ordinance and enforcement regulations. The Second is to define The Duty of Confidentiality or The Legal Fiction as Public Officials for Purposes of Applying Penalty Provisions in the act bill. The Third is to address managing the random reward items in the Game Rating and Administration Committee or is to give game user advance notice about the Comntent Dispute Mediation system.

• The KIPS Transactions:PartC
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• v.13C no.6 s.109
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• pp.725-732
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• 2006

RBAC(Role-Based Access Control) has advantages in managing access controls, because it offers the role inheritance and separation of duty in role hierarchy structures. However, RBAC does not process delegation of permission effectively that occurs frequently in the real world. This paper proposes an Advanced Permission-Based Delegation Model(APBDM) that guarantees permanency of delegated permissions and does not violate security principle of least privilege and separation of duty. APBDM, based on the well-known RBAC96, supports both user-to-user and role-to-role delegation. A delegator can give permission to a specific person, that is delegatee, and the permission can be withdrawn whenever the delegator wants. Our model is analyzed and shown to be effective in the present paper.