• Journal of Korean Foot and Ankle Society
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• v.20 no.3
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• pp.116-120
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• 2016

Purpose: Tarsal coalition results from defects during the developmental stage and produes ankle pain and limitations in the range of motions. Its incidence has been reported to be 1%, but there has not been any reports with respect to Koreans. Therefore, we evaluated the prevalence of tarsal coalition in Koreans. Materials and Methods: Between 2005 and 2014, we analyzed a total of 733 cases of foot and ankle magnetic resonance imaging (MRI) in our hospital. There were 391 men and 342 women. All MRI readings were read by a radiologist in our hospital. We classified the coalitions in accordance with the histological and anatomical characteristics, and calculated the prevalence in each group. Moreover, we tried to determine the prevalence of tarsal coalitions in accordance with sex, age, and proportion of the symptomatic tarsal coalitions. Results: There were a total of 11 MRIs of tarsal coalition - 9 talocalcaneal coalitions, 1 calcaneocuboidal coalition, and 1 calcaneonavicular coalition. Nine tarsal coalitions were observed in men and 2 in women. Conclusion: Through this study, we found that the prevalence of tarsal coalition, including the asymptomatic patients, is similar to the previously known prevalence (1%). By getting more MRIs of the foot and ankle, we could better represent the prevalence of tarsal coalitions in Koreans.

• The Journal of Society for e-Business Studies
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• v.7 no.2
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• pp.113-128
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• 2002

This paper proposes a public oriented e-Marketplace that induces strategic coalition using database in which detail information about each firm is contained. A public oriented e-Marketplace links each firm through the type of Internet business model and constructs a trading community. We introduce a design methodology of public oriented e-Marketplace called as social network analysis. Social network analysis helps each firm's network easily visualized and completely modeled. Additionally, this paper tries to analyze the relationship among the level of competition, potential of strategic coalition, and financial performance. We demonstrate the firm to easily accept various strategic coalitions can make higher financial performance under the more competitive condition. This implies that strategic coalition through public oriented e-Marketplace provide the each firm with various opportunities.

• Journal of Korean Foot and Ankle Society
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• v.16 no.3
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• pp.141-147
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• 2012

A tarsal coalition is an abnormal union between 2 or more tarsal bones of the hind- and midfoot, which can be congenital or acquired. The documented overall incidence of tarsal coalition is 1% or less. The resulting abnormal articulation leads to accelerated degeneration within adjacent joint. Pain is often diffuse, exacerbated by strenuous activity or following an ankle sprain. The findings on physical examination is protruded mass, diminished range of motion of the involved joint. It is possible to identify of tarsal coalitions with conventional radiography, but CT scanning necessary to evaluate of the size, location, characteristic and preoperative planning of tarsal coalitions. The initial treatment for a tarsal coalition is conservative, but tarsal coalitions unresponsive to conservative treatment, are managed by coalition resection, or arthrodesis in case of presence of degenerative changes.

• Journal of KIISE:Software and Applications
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• v.31 no.2
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• pp.101-110
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• 2004

In dynamic systems, such as social and economic systems, complex interactions emerge among its members. In that case, their behaviors become adaptive according to Changing environment. In many cases, an individual's behaviors can be modeled by a stimulus-response system in a dynamic environment. In this paper, we use the Iterated Prisoner's Dilemma (IPD) game, which is simple yet capable of dealing with complex problems, to model the dynamic systems. We propose strategic coalition consisting of many agents and simulate their emergence in a co-evolutionary learning environment. Also we introduce the concept of confidence for agents in a coalition and show how such confidences help to improve the generalization ability of the whole coalition. Experimental results are presented to demonstrate that co-evolutionary learning with coalitions and confidence allows better performing strategies that generalize well.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 1998.06a
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• pp.669-673
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• 1998

This paper makes a study of the Shapley value in cooperative fuzzy games, games with fuzzy coalitions, which enable the representation of players' participation degree to each coalition. The Shapley value has so far been introduced only in an class of fuzzy games where a coalition value is not monotone with respect to each player's participation degree. We consider a more natural class of fuzzy games such that a coalition value is monotone with regard to each player's participation degree. The properties of fuzzy games in this class are investigated. Four axioms of Shapley functions are described and a Shapley function of a fuzzy fame in the class is given.

• Journal of Korean Foot and Ankle Society
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• v.15 no.3
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• pp.179-182
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• 2011

Naviculocuneiform coalition is one of uncommon tarsal coalitions and especially symptomatic cases which need operative treatment are rare. Authors report 2 cases of pediatric naviculocuneiform patients who showed symptomatic condition as mainly pain. Plain radiographs, computed tomography or magnetic resolution imaging study showed bony bridge in naviculo-medial cuneiform joint. After over six months conservative treatment, excision of coalition and interposition $Tisseel^{(R)}$ was performed for motion preservation and relief of pain.

• Journal of the Korean Society for Library and Information Science
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• v.51 no.3
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• pp.265-292
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• 2017

The purpose of this study is to figure out the movements of policy actors in the policy process of the establishment of a local cultural foundation in B-gu(district), A-si (city), then to explore the way to contract out of the management of public libraries to the cultural foundation in the policy process. Data for the study were collected from various sources from newspapers and assembly minutes to blogs and SNS messages of the policy actors, then analysed based on Advocacy Coalition Framework (ACF). The results showed that 'agreement of contract-out' coalition only accepted public interest of the public libraries between the public interest and specialty of librarianship which were insisted by 'disagreement of contract-out' coalition's policy beliefs. The comparison between this case and a similar policy case showed that the specialty of librarianship as a core belief is effective in changing the beliefs of other coalition. Eventually, it is required to differentiate and to specialize library services among public services in a local area in order to keep the direct management of public libraries by the local government, and this means that everyday library services influence the decision making of library policies in the local area.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.2
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• pp.611-627
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• 2017

For enhancing the coverage of wireless networks and increasing the spectrum efficiency, small cell networks (SCNs) are considered to be one of the most prospective schemes. Most of the existing literature on resource allocation among non-cooperative small cell base stations (SBSs) has widely drawn close attention and there are only a small number of the cooperative ideas in SCNs. Based on the motivation, we further investigate the cooperative approach, which is formulated as a coalition formation game with power control algorithm (CFG-PC). First, we formulate the downlink sub-channel resource allocation problem in an SCN as a coalition formation game. Pareto order and utilitarian order are applied to form coalitions respectively. Second, to achieve more availability and efficiency power assignment, we expand and solve the power control using particle swarm optimization (PSO). Finally, with our proposed algorithm, each SBS can cooperatively work and eventually converge to a stable SBS partition. As far as the transmit rate of per SBS and the system rate are concerned respectively, simulation results indicate that our proposed CFG-PC has a significant advantage, relative to a classical coalition formation algorithm and the non-cooperative case.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.9
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• pp.4220-4241
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• 2017

For the downlink energy-harvesting small cell network, this paper proposes an interference management algorithm based on distributed coalitional game. The cooperative interference management problem of the energy-harvesting small cells is modeled as a coalitional game with transfer utility. Based on the energy harvesting strategy of the small cells, the time sharing mode of the small cells in the same coalition is determined, and an optimization model is constructed to maximize the total system rate of the energy-harvesting small cells. Using the distributed algorithm for coalition formation proposed in this paper, the stable coalition structure, optimal time sharing strategy and optimal power distribution are found to maximize the total utility of the small cell system. The performance of the proposed algorithm is discussed and analyzed finally, and it is proved that this algorithm can converge to a stable coalition structure with reasonable complexity. The simulations show that the total system rate of the proposed algorithm is superior to that of the non-cooperative algorithm in the case of dense deployment of small cells, and the proposed algorithm can converge quickly.

• The Southeast Asian review
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• v.24 no.1
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• pp.45-87
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• 2014

This study traces the possibility of political change in the Malaysian electoral history, especially by focusing on the 13th general election held in May 2013. The results of the 13th general election was another turning point in the history of Malaysia's electoral politics. Following after the 12th general election held in 2008, opposition coalition(PR) achieves a remarkable electoral result by obtaining over 50% of the total votes. Opposition parties also successfully collapsed the ruling coalition(BN)'s two-third majority in parliamentary. It was de-facto defeat of the ruling coalition and victory of the opposition coalition. More precisely, the 2013 election results show that the reformasi movement, which was active in 1998-99 period, are still alive and its impact on Malaysian electoral politics get stronger. Malaysia has long been considered as a typical electoral authoritarian regime since its independence in 1957. It is because that there has been negative relations between electoral politics and political change through out its electoral history. As shown in the most recent two general elections held in 2008 and 2013, however, Malaysia's hegemonic political system can be possibly changed through electoral politics. This article examines the detailed results of the series of post-reformarsi general elections(1999, 2004, 2008, 2013) and its political implications towards the nexus of electoral politics and political change under the electoral authoritarian regime in Malaysia.