• Management Science and Financial Engineering
• /
• v.16 no.1
• /
• pp.59-79
• /
• 2010

This paper considers bandwidth allocation and scheduling problems on Ethernet Passive Optical Networks (EPON). EPON is one of the good candidates for the optical access network. This paper formulates the bandwidth allocation problem as a nonlinear mathematical one and characterizes the optimal bandwidth allocation which maximizes weighted sum of throughput and fairness. Based upon the characterization, two heuristic algorithms are suggested with various numerical tests. The test results show that our algorithms can be used for efficient bandwidth allocation on the EPON. This paper also shows that the WSPT (Weighted Shortest Processing Time) rule is optimal for minimization the total delay time in transmitting the traffic of the given allocated bandwidth.

• Journal of the Korea Safety Management & Science
• /
• v.12 no.4
• /
• pp.139-143
• /
• 2010

The small and medium construction companies are facing potential EHS(Environment, Health & Safety) of major accidents to cause casualties or a financial loss and increasing social responsibility. So, they have to voluntarily accomplish the EHS management system rather than passively with regard to EHS regulation. In this study, the framework of integrated EHS management system is developed based on cloud computing, and construction companies are to materialize self-regulation EHS process of construction workplace and to standardize the total EHS business process using the developed system. The proposed system also provides risk analysis, education/control and continuous improvement for EHS tasks and users can easily access the system on the web at a low price through cloud computing service. Eventually, the integrated system contributes to the managerial improvement by minimizing economic and physical loss caused by construction accidents.

• Proceedings of the KIEE Conference
• /
• summer
• /
• pp.105-106
• /
• 2004

This paper explains a network for various participants of the electricity market to make bids on the power exchange. The power exchange accepts bids for various markets such as day-ahead, realtime, and financial over this interface. It exists on the IT plane of the market hierarchy and the participants are able to access it over the internet.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.359-362
• /
• 2009

Qualified certificates in online financial and security transaction area are currently used for authentication of the user. The authorized user's public key certificates are stored in binary; the private key corresponding to the user's public key certificates is encrypted by the user password, and then is stored in a file. But the present management system to access the public certificates in local has some problems. In this study, we propose that the mobile public certificate management application to avoid the exist problems.

• Asia Marketing Journal
• /
• v.24 no.2
• /
• pp.51-61
• /
• 2022

The goal of this study is to scrutinize the impact of individual online convenience dimensions on mobile banking acceptance and use in Mongolia. A total of 211 valid responses were collected from Mongolian university students who currently use mobile banking application services from local banks. The SmartPLS 3.3 software was used to conduct the confirmatory factor analysis and test the hypotheses. Using structural equation modelling, this research discovered that access convenience, transaction convenience, and possession/post-possession convenience are the main constructs related to the adoption of mobile banking services. Perceived innovation showed a significant positive effect on the adoption of mobile banking technologies. Through practical and theoretical implications, this research aims to assist mobile banking service channels of local and international banks in Mongolia. Identifying which online convenience dimensions impact the adoption and use of mobile banking will contribute to the adoption of competitive strategies for financial institutions and banks.

• Journal of the Korean housing association
• /
• v.25 no.5
• /
• pp.51-61
• /
• 2014

This study aims to understand the current state of a community project in Seoul and to determine a revitalization plan for community projects of inhabitants initiative. Regarding the research methods, 10 apartments that participated in this activation project in Seoul were selected, 31 residents who participated in community activities were surveyed, and 20 community planners in Seoul were surveyed. The results indicate that community leaders are the most important factor in community programs. community leaders must be able to promote participation and a spirit of service; they must also be capable of managing and implementing programs. To ensure that local community resources are utilized and integrated, it was shown that consultation and human resources are of the highest necessity. Moreover, regarding community education, it was shown that for providing general opportunities and means by which community activities may be implemented, program information and space applications are crucial. Furthermore, financial support and support for public relations activities from the government are necessary. To activate apartment communities, first, community education programs for residents must be provided. Second, a system that facilitates access to and sharing of resources from areas outside the community must be established. Third, financial support should be consistent to support community activities. Finally, the promotion of community vitalization at the government level is necessary.

• Journal of the Korean Society for Library and Information Science
• /
• v.7
• /
• pp.3-67
• /
• 1980

Because of the changes made in the modes of cataloguing and classification in its long history, the present catalogue of the National Central Library has become complicated and provides an inadequate guide to its collection. There can be no doubt that this is a serious deficiency in a closed access library since materials housed in the library are virtually inaccessible to unskilled readers. The whole breakdown of the efficiency of the catalogue is emminent and will ultimately create the most serious problems for the library. The main purpose of this survey is: (a) to identify problem areas created by the frequent changes in the cataloguing and classifying principles in the library and (b) to grope a rational direction for the future development. Analysing the various classification schemes and cataloguing rules adopted in processing materials (mainly books) in the library, the following conclusions have been made. A. The library adopted five different clasification schemes in different periods, of which KDCP was used for the most part of its collection. KDCP is recommended to use for the future colletion. A classification development office is recommended to be established within the library, of which the main function is to revise the KDCP in collaboration with the appropriate committee of the Korean Library Association. B. The present practice in the library is to apply three different cataloguing rules and two different author notation tables to the Oriental, classical, and Western collections. Efforts should be made to find out an efficient system so that this variety is simplified. An alphabetical index should be added to the classified catalogue, and improvements are required in the Japanese collection. C. The technical services division is inadequately staffed. The staff should be sufficiently numerous and specially qualified. D. The present financial support for the technical services of the library is inadequate. Sufficient financial provision should be made to ensure the effective work. E. A feasibility study should be carried out to develop a computer processing system for providing machine-readable catalogue records on magnetic tape for use by the library community in Korea.

• Nutrition Research and Practice
• /
• v.10 no.5
• /
• pp.530-536
• /
• 2016

BACKGROUND/OBJECTIVES: The concept of "food deserts" has been widely used in Western countries as a framework to identify areas with constrained access to fresh and nutritious foods, providing guidelines for targeted nutrition and public health programs. Unlike the vast amount of literature on food deserts in a Western context, only a few studies have addressed the concept in an East Asian context, and none of them have investigated spatial patterns of unhealthy food consumption from a South Korean perspective. SUBJECTS/METHODS: We first evaluated the applicability of food deserts in a Korean setting and identified four Korean-specific unhealthy food consumption indicators, including insufficient food consumption due to financial difficulty, limited consumption of fruits and vegetables, excessive consumption of junk food, and excessive consumption of instant noodles. The KNHANES 2008-2012 data in Seoul were analyzed with stratified sampling weights to understand the trends and basic characteristics of these eating patterns in each category. GIS analyses were then conducted for the data spatially aggregated at the sub-district level in order to create maps identifying areas of concern regarding each of these indicators and their combinations. RESULTS: Despite significant reduction in the rate of food insufficiency due to financial difficulty, the rates of excessive consumption of unhealthy foods (junk food and instant noodles) as well as limited consumption of fruits and vegetables have increased or remained high. These patterns tend to be found among relatively younger and more educated groups, regardless of income status. CONCLUSIONS: A GIS-based analysis demonstrated several hotspots as potential "food deserts" tailored to the Korean context based on the observed spatial patterns of undesirable food consumption. These findings could be used as a guide to prioritize areas for targeted intervention programs to facilitate healthy food consumption behaviors and thus improve nutrition and food-related health outcomes.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.26 no.1
• /
• pp.177-185
• /
• 2016

As the fintech industry is growing at an incredible rate, mobile phones are positioned as the most important tool for financial transaction. However, with a rising number of malware applications, the types of attack and illegal access to mobile device are becoming more diverse and sophisticated. This paper studies the potential keylogger attack by exploiting the Accessibility Service in Android framework. This type of attack allows the malicious individual to use keylogger on the victim's Android mobile phone to steal passwords during mobile financial transaction regardless of security keypad setting. Lastly the paper proposes solutions to counter these types of attack by verifying the accessibility usage and amending the application guideline for accessibility.

• Journal of Labour Economics
• /
• v.35 no.3
• /
• pp.51-81
• /
• 2012

This paper empirically investigates the dynamics of the poverty-higher education gap in Korea. Poverty may lead to a gap in access to higher education through two channels: the short-term inability to pay college tuition and fees and long-term disadvantages arising from one's environment that impede the development of academic ability. A regression analysis based on data from the Korean Education and Employment Panel suggests that it is long-term disadvantages that plays a dominant role in the dynamics of this gap. We also replicate a study carried out by Carneiro and Heckman, who have addressed a similar question in the US. Again, the results confirm that the crucial constraint is the long-term accumulation of disadvantages arising mainly from family background, not the short-term constraint. These findings suggest that policies designed to alleviate short-term financial constraints, such as tuition reduction, will be less effective in reducing the gap in accessing four-year college in Korea than policies involving early intervention in children's development.