• Journal of the Institute of Electronics Engineers of Korea TC
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• v.40 no.12
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• pp.83-93
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• 2003

Differentiated service networks, based on bandwidth broker, perform the control and management of QoS provisioning for the QoS guaranteed services, However, the centralized bandwidth broker model has a scalability problem since it has centralized resource management for the admission control function of all call attempts, Therefore, in this paper, we proposea novel adaptive admission control mechanism according to the attempted call status for enhancing the scalability under the centralized bandwidth broker model in IP differentiated service networks, The proposed mechanism decouples the function of admission control from the bandwidth broker, So, the ingress edge node performs the admission control and the bandwidth broker performs the resource management and QoS provisioning, We also introduce an edge-to-edge path concepts and the ingress edge node performs the admission control under the allocated bandwidth to eachpath. The allocated bandwidth per path adaptively varies according to the status of the attempted calls, This mechanism can significantly reduce the number of communication message between the bandwidth broker and each edge node in the network and increase the bandwidth utilization via adaptable resource allocation, In this paper we study the adaptive admission control operation and show the efficient and extensive improvement through the performance evaluation.

• Korean Journal of Social Welfare Studies
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• v.45 no.3
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• pp.151-178
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• 2014

Highly Differentiated and segmented social insurance scheme in Taiwan shows its salient dimension of stratification, which has been considered as a general feature of conservative welfare regime. However, compared to Western conservative welfare states, Taiwan's social insurance scheme shows a distinct feature. First, Taiwan's social insurance scheme has offered a full coverage for various benefits. Secondly, Labor Insurance and Government employees' Insurance reveal distinct features of stratification. Labor Insurance has developed a universalistic system based on status equality and cross-class solidarity of working classes while Government employees' Insurance includes a myriad of occupational- and status-based programs. This article aims to articulate the historical origin of Taiwan's unique social insurance scheme and explains it as an unintended result of state's political intervention and various interests of each insured groups, especially, politically, economically, and ethnically conflicting identities of government employees and working classes.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.4
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• pp.49-67
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• 2002

School libraries are one of the essential parts for high quality education. The Seventh Educational Cumiculum emphasizes the development of creative and autonomous students who can solve problems in a self-directed way. The Ministry of Education and Human Resources Development come into forcing the installation of school digital library since 2001. Also, the Ministry of Education and Human Resources Development has presented the Master Plan of School's Activation in July 2002. In this situation, the research and discussion on effective model of school digital library are very important. Thus, This study aims to design a model of school digital library differentiated School's sizes depending on primary and secondary school's current status. This study is proposed 4 facility model of school digital library based differentiated school's sizes and designed A-type, B-Type model on individual model.

• The KIPS Transactions:PartC
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• v.11C no.6 s.95
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• pp.807-814
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• 2004

This paper researches and evaluates a bandwidth reallocation mechanism for efficient DiffServ QoS support in MPLS networks by monitoring the network traffic status and reallocating unused bandwidth. While the Differentiated Services in MPLS Networks architecture provides QoS management through the RSVP resource reservation, this mechanism is based on a static provisioning of resource. But this approach can lead to waste bandwidth in some service classes or, leave some service classes' resource starved. This paper presents the bandwidth reallocation dynamically based on network traffic status for bandwidth usage maximization.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.7
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• pp.3446-3464
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• 2017

Backoff mechanism serves as one of the key technologies in the MAC-layer of wireless mobile networks. The traditional Binary Exponential Backoff (BEB) mechanism in IEEE 802.11 Distributed Coordination Function (DCF) and other existing backoff mechanisms poses several performance issues. For instance, the Contention Window (CW) oscillations occur frequently; a low delay QoS guarantee cannot be provided for real-time transmission, and services with different priorities are not differentiated. For these problems, we present a novel Multi-Priority service differentiated and Adaptive Backoff (MPAB) algorithm over IEEE 802.11 DCF for wireless mobile networks in this paper. In this algorithm, the backoff stage is chosen adaptively according to the channel status and traffic priority, and the forwarding and receding transition probability between the adjacent backoff stages for different priority traffic can be controlled and adjusted for demands at any time. We further employ the 2-dimensional Markov chain model to analyze the algorithm, and derive the analytical expressions of the saturation throughput and average medium access delay. Both the accuracy of the expressions and the algorithm performance are verified through simulations. The results show that the performance of the MPAB algorithm can offer a higher throughput and lower delay than the BEB algorithm.

• Journal of the Korean Society of Industry Convergence
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• v.27 no.3
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• pp.709-725
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• 2024

This study utilized the raw data from the Community Health Survey (2023) to compare differences in body function, activity, participation, environment, personal factors, and suicidal ideations between elderly individuals aged 65 and older living alone and those living with families in Korea. The study subjects consisted of 80,618 elderly individuals aged 65 and older. Cross-tabulation analysis χ²-test), independent sample t-test, and logistic regression analysis were conducted. The results indicated that for both elderly individuals living alone and those living with families, age(p<.001), smoking(p<.001), stress(p<.001), depression experience(p<.001), and falls experiences(p<.001) were risk factors that increased suicidal ideations. Conversely, educational level(p<.05), income level(p<.001), subjective health status(p<.001), social participation(p<.001), economic activity(p<.001), community environment(p<.001), and social relationships were protective factors that reduced suicidal ideations. These findings demonstrate that demographic characteristics and individual health status significantly influence suicidal ideation in the elderly, while social factors contribute to a decrease in suicidal ideation. Furthermore, considering the differences found between elderly individuals living alone and those living with families regarding hypertension and gender, differentiated interventions for suicide prevention are necessary.

• Journal of Agricultural Extension & Community Development
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• v.18 no.3
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• pp.531-550
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• 2011

This study aims to examine the Visitor's selection attributes and types of preference regarding Rural Theme Village, and gather useful information for establishing differentiated marketing strategies suitable for market segments by the Visitor's selection attributes. In addition, it will contribute to securing competitiveness in providing Visitors with better service by extracting differentiating factors of Rural Theme Villages, and exploring the right direction of Rural Tourism. For the empirical analysis, the attributes were extracted based on the preliminary studies, and a survey was conducted among Visitors and users of Rural Theme Village to examine such factors as importance of selection attributes status, motives of using such Rural Theme Villages, demographic characteristics, and general features of the Rural Theme Villages.

• 한국노년학
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• v.34 no.2
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• pp.387-407
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• 2014

This study aims to identify the multiple trajectories of depressive symptoms and the characteristics of each trajectory group among the elderly. This study uses five waves of longitudinal data from the Korean Welfare Panel Study (KWPS, 2006-2010). Subjects were older adults aged 60 and over who had completed at least three waves between 2006 and 2010. A total of 4,181 respondents were analyzed. The latent growth mixture model and the multiple logistic regression model were mainly used for data analysis. The major findings were as follows: After controlling for the variables of gender, age, education, marital status, self-assessed health, and poverty, this study identified four different trajectory classes: stable low depressive symptoms (71.8%), high but decreased depressive symptoms (10.6%), moderate but increased depressive symptoms (7.9%), and an increased, then a decreased pattern of depressive symptoms (9.7%). The characteristics of theses trajectories as compared to previous studies were a lower percentage of 'stable low depressive symptoms', no 'persistently high depressive symptoms', and higher level of depressive symptoms. Also, the elderly in the stable low trajectory group had better health status, higher self-esteem and a good relationship with family members, having longer working periods, and more living in non-poverty. In addition, chronic health problems, loss of spouse, and household income differentiated the increased and then decreased pattern from the low stable pattern. Also, age and public pension differentiated the moderated but increased pattern from the low stable pattern. Based on the findings of this study, the researchers suggested political and practical implications for reducing depressive symptoms in later life.

• Journal of the Korean Regional Science Association
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• v.40 no.3
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• pp.43-61
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• 2024

The purpose of this study is to identify the difference of regional characteristics affecting 'marriage stage' and 'childbirth stage' and to compare how these factors differ between metropolitan and non-metropolitan areas using a heckman two-stage selection model. The main findings are as follows. First, regional characteristics affecting marriage stage and childbirth stage are different. Second, in the metropolitan area, regional characteristics such as population density, the proportion of female employee, and housing prices have a relatively greater impact on 'marriage', and in the non-metropolitan area, regional characteristics such as population density and unemployment rate have more impact on 'childbirth'. The empirical analysis suggests that marriage and childbirth stage need to be distinguished when establishing low fertility policies, and these approaches should be differentiated at regional level.

• Journal of Gifted/Talented Education
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• v.24 no.3
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• pp.379-398
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• 2014

This research examined to seek managing the way of effectiveness for training through the teachers' perceptions and the current status of in-service training for the gifted in arts. Conclusions based on the results of the analysis are as follow. First, it is analyzed that about 49.4 percent of respondents do not have any experiences of in-service training related to the gifted education in arts and there are also teachers who teach with no experiences of in-service training. Moreover, it is also analyzed that in-service training is generally being conducted with revolving to basic courses and the opportunities that teachers are able to develop programs for themselves are offered insufficiently. Second, in terms of management of in-service training, it is implied that accessibility to the training site and the active promotion of program, as well as sufficient provision of information, have to be considered in advance. Third, teachers have recognition that it is important to secure the diversification of training types, professionalism of instructors and managing directors for the effectiveness of in-service training. Forth, in terms of program, teachers show that the provision of educational programs, the diversification of training contents and the differentiated opportunities for developing programs according to basic, advanced courses, which can be applied to the field of gifted education in arts are most important. Furthermore, the convenience of transportation and the amenity of training facility are said to be important elements. Therefore, we suggest that, for increasing the effectiveness of in-service training for teachers of the gifted in arts, not only differentiated in-service training model and curriculum which can be applicable to the field, but also efficient environment suitable for the characteristics of the gifted education in arts.