• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.8C
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• pp.803-811
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• 2002

Asynchronous Transfer Mode-Passive Optical Network(ATM-PON) Technology is one of the best solutions for implementation of broadband access network. In this paper, we propose a new Dynamic Bandwidth Allocation (DBA) algorithm for ATM-PON systems. The DBA is a key technique for data traffic management. DBA has been studied widely to allow ATM-PON to transport data traffic cost-effectively and efficiently, and currently a hot standardization issue in Full Service Access Network(FSAN) and ITU-T. The proposed DBA algorithm efficiently manages the user traffics according to their service categories. Performance of the proposed algorithm, in aspect of Cell Transfer Delay(CTD) and Cell Delay Variation(CDV), is evaluated using computer simulation.

• Information Systems Review
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• v.8 no.3
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• pp.175-200
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• 2006

Application service provider(ASP) model is emerging as a new form of application outsourcing. ASP model may be attractive for small companies and even some medium-sized companies because these companies lack appropriate resources and technical expertise to develop and operate their information system. However, studies of ASP model have so far been neglected. Service quality is argued to be a crucial success factor for ASP, but yet there is not an empirically validated instrument for measuring ASP service quality. Therefore, this paper aims to develop and test a model for measuring ASP service quality. In order to accomplish these, SERVQUAL that has developed in marketing area were adapted to the context of this study. The research sample was designed by randomly selecting 300 different companies from the database that listed up the small companies participating in "ASP based e-business project for small enterprises". 240 usable responses were received by interview. The results are that reliability and tangibility impact user performances and satisfaction more than any of the service quality dimensions.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.12
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• pp.5855-5877
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• 2017

In view of personal health and disease management based on cost effective healthcare services, there is a growing need for real-time monitoring services. The electrocardiogram (ECG) signal is one of the most important of health information and real-time monitoring of the ECG can provide an efficient way to cope with emergency situations, as well as assist in everyday health care. In this system, it is essential to continuously collect and transmit large amount of ECG data within a given time and provide maximum user convenience at the same time. When considering limited wireless capacity and unstable channel conditions, appropriate signal processing and transmission techniques such as compression are required. However, ISO/IEEE 11073 standards for interoperability between personal health devices cannot properly support compressed data transmission. Therefore, in the present study, the problems for handling compressed data are specified and new extended agent and manager are proposed to address the problems while maintaining compatibility with existing devices. Extended devices have two PM-stores enabling compression and a novel transmission scheme. A variety of compression techniques can be applied; in this paper, discrete cosine transformation (DCT) is used. And the priority of information after DCT compression enables new transmission techniques for performance improvement. The performance of the compressed signal and the original uncompressed signal transmitted over the noisy channel are compared in terms of percent root mean square difference (PRD) using our simulation results. Our transmission scheme shows a better performance and complies with 11073 standards.

• Journal of the Korea Society of Computer and Information
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• v.16 no.9
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• pp.107-114
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• 2011

Because of boost of communications devices furnishing diverse services and rapid expansion of mobile business, good use and management of the existing network system become very important. Also, offering service corresponding with user communication requirement grades which vary widely in each person, is vital for communication service provider. In this paper, SGOSST, a mechanism of efficient network construction with minimum cost for network QoS is proposed. In experiments, though spending 252.97% more execution times, our SGOSST QoS network consumed 5.11% less connecting costs than the network constructed by weighted minimum spanning tree method. Therefore our mechanism can work well for efficient operation and service providing in the network formed with users and communication devices of various service requirement grade as smart/mobile equipment.

• Journal of Technologic Dentistry
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• v.28 no.1
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• pp.67-81
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• 2006

This research has been attempt to examine closely factors that high cost and value to overall satisfaction state for dental implant prosthesis, re-utilization intention, inducement intention of the general hospital dental service user and provide basis data necessary to establish competitive general hospital dentistry management strategy. Collected data using own recording way questionnaire from April 17, 2004 to May 15, 2004 choosing 142 people that agree on this research and question of 361 people that dental implant prosthetic treatment finished from March 1, 1999 to March 1, 2004 for this. Major analyzation consequences are as follows : First, general satisfaction, re-utilization intention, inducement intention for implant prosthesis that highly correlation variables are kindness, explanation, medical treatment level and appreciation of the aesthetic. Second, correlation is high relatively between re-utilization intention, inducement intention in the 3 variables such as general satisfaction re-utilization intention, inducement intention. Third, the result of multiple regression analysis showed that most significant effective factors are satisfaction with explanation of dental implant prosthesis between the 3 dependant variables such as general satisfaction, re-utilization intention, inducement intention. In looking into these consequence, how to improve that raise satisfaction about dental implant prosthetic treatment and to establish patient focused care service system for dental implant prosthesis, it is consider that explain enough about implant prosthesis and raise quality of medical examination and treatment level, including satisfied with fabrication of good esthetic dental implant prosthesis.

• Convergence Security Journal
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• v.14 no.3_2
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• pp.3-12
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• 2014

The government was fully aware of the gravity of a recent massive leak of personal information of credit card users. Meanwhile, the government just took a light disciplinary action by imposing a fine, but it showed its intention to strengthen the regulations by taking the severest disciplinary action. The tightened regulations against personal information leak will be applied to the private security industry without exception to protect individual people's property and lives if such an incident occurs in that industry that deals with a wide variety of personal information such as CCTV data or privacy information all the time. The purpose of this study was to examine the state of the protection and management of personal information for service users among private security firms in an effort to suggest some reform measures. The findings of the study were as follows: First, administrators or managers who are involved with personal information protection should make a full-fledged effort to gather information. Second, counseling or related programs should be provided for small and mid-sized security firms to guarantee thorough personal information protection. Third, Korea Security Association should improve the educational system related to personal information protection to resolve problems with this education currently provided for managers and employees of these companies.

• Journal of Advanced Marine Engineering and Technology
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• v.41 no.4
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• pp.353-361
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• 2017

As ship-based tourism increases, safe sailing and management are necessary to prevent maritime accidents. Because external rescue support cannot arrive rapidly in the case of ship-related accidents, the initial response is very important for damage minimization. Further, for secondary damage prevention, it is necessary to accurately determine passenger positions. In this paper, considering the characteristics of a ship, the enhanced-Zigbee(e-Zigbee) position determination technology (PDT) is applied, which improved upon the Zigbee PDT by having advantages such as low power consumption and smaller size. According to user needs, a low-cost and high-precision passenger positioning tag and access point(AP) is provided. A ship testbed that yields improved positioning accuracy based on a performance evaluation is constructed.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.14
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• pp.5545-5550
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• 2014

Background: Human biological materials from cancer patients are linked directly with public health issues in medical science research as foundational resources so securing "human biological material" is truly important in bio-industry. However, because South Korea's national R and D project lacks a proper managing system for establishing a national standard for the outputs of certain processes, high-value added human biological material produced by the national R and D project could be lost or neglected. As a result, it is necessary to develop a managing process, which can be started by establishing operating guidelines to handle the output of human biological materials. Materials and Methods: The current law and regulations related to submitting research outcome resources was reviewed, and the process of data 'acquisition' and data 'distribution' from the point of view of big data and health 2.0 was examined in order to arrive at a method for switching paradigms to better utilize human biological materials. Results: For the deposit of biological research resources, the original process was modified and a standard process with relative forms was developed. With deposit forms, research information, researchers, and deposit type are submitted. The checklist's 26 items are provided for publishing. This is a checklist of items that should be addressed in deposit reports. Lastly, XML-based deposit procedure forms were designed and developed to collect data in a structured form, to help researchers distribute their data in an electronic way. Conclusions: Through guidelines included with the plan for profit sharing between depositor and user it is possible to manage the material effectively and safely, so high-quality human biological material can be supplied and utilized by researchers from universities, industry and institutes. Furthermore, this will improve national competitiveness by leading to development in the national bio-science industry.

• Journal of Korean Library and Information Science Society
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• v.29
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• pp.171-212
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• 1998

In this study, the concept, developments and the present situations of an electronic document delivery services, projects and systems are examined. Also the implications of an electronic document delivery services in the library and the future of the services are studied. Some conclusions and a few suggestions derived from the study are as follows : (1) An electronic document delivery services, one of the most innovative methods for delivering the needed materials to a researcher is now being incorporated into an important part of today's information industries. (2) The technological developments have made it possible to deliver nearly all the document formats electronically, and can make the shortest turnaround time to be 30minutes. The technology has also made it possible to develop user-friendly document delivery services by providing the various methods of requesting of, delivering of and charging for the materials. (3) Different types of institutions have made researches, tests, developments and implementation of an electronic document delivery techniques with different features. (4) The issues of copyrights and standards involved in an electronic document delivery still remain as the problems to be solved. (5) The increase and development of patron-initiated document delivery services have and will have some impacts on the library services with the possibility to pass by the librarians intermediation, but to deliver the materials directly to the end-users. (6) The library could take the outside electronic document delivery services as an opportunity. Accordingly, in order to incorporate this services in the interlibrary loan, collection development and other library services, the library should establish appropriate policies, guidelines and management strategies related to the operations. (7) In order to maximize the use of the electronic document delivery services, the library should provide an appropriate education for the librarian and users to have knowledge and skills on the changing techniques of the electronic document delivery and on the various features as well as changing mechanisms by each system and service.

• Journal of Korean Library and Information Science Society
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• v.51 no.1
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• pp.305-327
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• 2020

This study aims to suggest the ways to reinforce academic library's research support services for professors and researchers in Korea. For this purpose, this study collected the development plans of academic libraries in Korea, and analysed the plans for supporting research activities, and also analysed each library's homepage. And this research classified the research support services of academic libraries into eight types for further analysis. The types are 'subject guide', 'academic information literacy', 'research analysis service', 'research consulting', 'research ethics education', 'thesis writing guide', 'bibliography management program', 'interlibrary loan·original text copy'. As a result, it is shown that the most libraries emphasized 'custom-tailored user education' and marked it on development plan. As subsequent plans, libraries provided the action plans of 'expansion of scholarly DB instruction on each subject', 'expansion of custom-tailored research support services', 'construction of research support service system' one after another. This study suggests 'activation of subject guide service', 'expansion of academic information literacy programs for supporting research', 'introduction of research performance analysis services', and 'support for establishment of research ethics' as ways to strengthen academic libraries' research support services.