• Journal of Korean Institute of Industrial Engineers
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• v.21 no.1
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• pp.137-151
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• 1995

A difficult problem in operating Flexible Manufacturing Systems (FMS) is to control the system in real-time by coordinating heterogeneous machines and integrating distributed information. The objective of the paper is to present the models and methodologies useful to resolve the difficult problem. The detailed objectives can be described in three folds. First, a hierarchical Colored and Timed Petri-Net (CTPN) is designed to control an FMS in real-time. The concerned FMS consists of a loading station, several machining cells, a material handling system, and an unloading station. Timed-transitions are used to represent the timed-events such as AGV movements between stations and cells, part machining activities in the cells. Signal places are also used to represent communication status between the host and the cell controllers. To resolve the event conflicts and scheduling problems, dispatching rules are introduced and applied. Second, an implementation methodology used to monitor and diagnose the errors occurring on the machines during system operation is proposed. Third, a Petri-Net simulator is developed to experiment with the designed control logic.

• Journal of Physiology & Pathology in Korean Medicine
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• v.22 no.5
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• pp.1132-1139
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• 2008

The structure of medical profession is composed of multiple relations among state, patients, and medical professions. There are conflicts between the nation and medical professions because the nation controls the monopoly of medical professions through medical policies. Patients make relations with medical profession as medical consumers. And medical professions compete each other in order to gain the control of the medical market. This paper attempts to review the dynamic relations between the nation and medical professions. The medical professions and the nation are in conflict about the control of the autonomy of medical professions. The medical professions want to exercise the monopoly rights in their own area and, on the other had, the nation wants to prevent problems that might result from the monopoly by regulations and to have the control over the national operation. Given this, the common view of medical sociology is that the nation and the medical professions are in constant conflict. The arguments that the present medical sociology has on the relationship between the nation and medical professions can be summarized like these: first, the nation is the authenticator of medical system; second, the nation is a medical provider and consumer; and, third, the nation is a mediator of regulations and conflicts. Based on the above mentioned relations between the nation and medical professions, this paper attempts to see how the nation, which is one component of the medical structure, make influences on Korean Oriental doctors and Traditional Chinese doctors. So as to do this, the changes in medical policies and promoting policies for Korean Oriental medicine and Traditional Chinese medicine are analyzed. Finally, the differences in national policies of Korean Oriental medicine and Traditional Chinese medicine are compared.

• The Journal of the Korea Contents Association
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• v.8 no.2
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• pp.57-66
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• 2008

Most concurrency control protocols have been devised for resolving data conflicts among real-time transactions of a single type. Recent real-time database systems should support various types of real-time transactions due to needs of many different types of applications and steady improvement of hardware. In this paper, we propose integrated concurrency control protocol to resolve data conflicts among hard and soft real-time transactions. Our proposed protocol, based on PCP(Priority Ceiling Protocol) for a hard real-time transactions and MVPR(Multiversion with Precedence Relationship), guarantees that hard real-time transactions meet their deadline, and decreases the deadline miss ratio of soft real-time transactions. We also proved that the proposed protocol guarantees serializable schedules and no deadlocks. The performance of the proposed protocol has been compared with other real-time concurrency protocols.

• Journal of the Korea Society of Computer and Information
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• v.26 no.11
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• pp.75-84
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• 2021

In this paper, we propose an adaptive concurrency control scheme to reduce conflicts and working time in the cooperative work in mixed reality. To this ends, we first classified the goals, tasks and ownerships of the cooperative work. Then, the classified relationships are mapped according to their temporal and hierarchical relationships of shared object manipulation in the cooperative work. The proposed system provides adaptive concurrency controls of the shared object according to temporal orders of the sub-goals. With the proposed scheme, a participant is enable to move and rotate a shared object although another already has an ownership of the shared object in a specific order of the sub-goal. Thus, the proposed system provides adaptive and realistic cooperative working environment. We conducted a user study of the proposed scheme. The proposed system could reduce conflicts and working times comparing to conventional approaches.

• Journal of Information Technology and Architecture
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• v.11 no.3
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• pp.321-332
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• 2014

In this paper we propose a new notion of predictable flags type of authorization for controlling access to XML documents. By using predictable flags, we are able to efficiently detect conflicts between existing authorizations and new authorizations to be added. XML documents have an element-composition hierarchical structure in that a higher level element consists of multiple lower level sub-elements. Many XML documents systems have used the notion of implicit authorization that grants authorizations to an element and the all descendants to avoid the overhead caused by explicitly storing all authorization for each element. When we grant an authorization on an element in the XML documents, the implicit authorization method is inefficient in determining the conflicts since it needs to examine all authorizations on the descendants of that element. In contrast, our mechanism using predictable flags has the advantage of detecting the conflicts immediately at the element where an explicit authorization is to be granted.

• The Journal of the Korea Contents Association
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• v.10 no.1
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• pp.222-229
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• 2010

I study how the deviation of strong women clashes with patriarchism and the clash is represented in the films. Women of Spirit's in 1960's narrative deals with the generational conflicts and the older's defeat, and that reflects the changes of the times. The narrative of Horse-year Bride in 1960's deals with changes of housewives' status, deviation and return of the strong-willed women, and becoming 'a wise mother and good wife'. The Daughter-in-Law Born in the Year of Horse in 1970's has two meanings - rejecting the active women and reinforcing patriarchism. The narratives of these films mean the obedience to patriarchism and the punishment women for their activity. But, these films also show the pleasure of resistance by revealing the gap and the contradiction of patriarchism.

• Cross-Cultural Studies
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• v.27
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• pp.81-104
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• 2012

This paper looks into the complexity of the comparative and conflictive elements portrayed on the novel Nada. Through the interpretation of the actions of the female characters, we can classify them into two different categories: pro-Franco and anti-Franco system. Thus, for example, the character Ena is an active, intellectual and liberal woman capable to manipulate and control men who lives at her own free will. This active and liberal personality is clearly not the favored type of woman under Franco, which prefers a society where men are the dominant figures. Another female character, Gloria, places herself far from the Catholicism based morality during the Franco period as she is having an affair with her husband's brother. We also find examples of the opposite, that is, affinity with Franco ideals, such as Angustias' decision to become a member of the convent, in line with the motto "Spain, united and great, through Catholicism"; the example of Ena's mother, nurturing six sons and daughters, also resonates with Franco ideology of a woman's role in the Spanish society, being mostly a reproductive instrument. One of the topics of this novel is the confrontation between the prewar petit bourgeoisie and the new postwar bourgeoisie. We can appreciate a big difference between the lifes of Andrea's family and Pons' family. Andrea has friendly relationships with friends from the new bourgeoisie; however, these interactions are not genuine, but superficial. Because of that, we also conclude that this novel reflects the underlying conflicts between different social strata. We also observe the conflicts and confrontations between republicans and nationalists in this society, through the relationships between two brothers, Juan y $Rom{\acute{a}}n$. During the civil war, Juan collaborates with the national faction, while $Rom{\acute{a}}n$ joins the republican faction. Consequently, they separate from each other due to their different ideologies. We will conclude that this novel also reflects on the idea that the Spanish civil war destroyed fraternity and separated families.

• Journal of National Security and Military Science
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• s.4
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• pp.351-379
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• 2006

Former ministers of national defense and foreign affairs, intellectuals such as former and incumbent professors, and various NGO groups are demanding the South Korean government to stop promoting independence in operational control which is currently held by the United States Armed Forces in Korea commander. Although the Korea should exercise operational control independently in the future, orientation on the direction which should be taken under consideration in promoting this transfer should be assumed. First of all, South Korea must sufficiently examine the criticisms and dissenting opinions, and reflect them in promoting independence in operational control. From now on, the South Korean government should reflect the opinions of experts in operational control, and must promote the transfer with national consensus. Unilateral enforcement of the transfer may cause serious errors and aggravate conflicts Second, ROKA's exercise of independence in operational control should take place only after gaining restraint on North Korea's attack against the South, and the issues on nuclear weapons and weapons of mass destruction(WMD) has been resolved, and a peace regime has been reached. Furthermore, exercise of independence in wartime operational control should be promoted only if there is a guarantee that international trust and the military collaboration will be restored to a level beyond the present state. Third, the USFK and the Korean-US alliance is providing South Korea with national security, not to mention tremendous diplomatical, and economical benefits However, if the alliance between the two countries become weakened due to the exercise of the independence in operational control, we might suffer a great deal of loss. Even though reasonable justification and external independence may be gained through promoting independence in operational control, it should be promoted in a longitudinal manner because national security problems and conflicts may be intensified, and there is no actual profit in doing so. Fourth, if the Korean-US alliance becomes weakened and therefore the United States decides to discuss eastern-asia strategies, North Korea deterrence strategies, and Japanese rearmament issues with other neighboring countries, South Korea may become diplomatically isolated and a subordinate to surrounding countries, destroying the independence we have now instead of restoring it Therefore searching for means to reinforce international trust and collaboration between South Korea and the United States, and leaving ROKA’s independence in operational control as a long term objective would be a more realistic method.

• Journal of Korea Multimedia Society
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• v.15 no.12
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• pp.1464-1474
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• 2012

In this paper, we propose a QoS (Quality of Service)-aware and cooperative resource reservation scheme using cross-layer link adaptation for wireless high definition video transmission through UWB (Ultra Wide Band) network with D-MAC (Distributed Medium Access Control). A wireless high definition video transmission system usually requires stable high throughput even without line-of-sight, e.g., a destination device in another room separated by a wall. Since the WiMedia D-MAC supporting DRP (Distributed Reservation Protocol) scheme causes lots of DRP resource reservation conflicts due to failure of beacon detection in wireless channel environment, overall performances of the WiMedia D-MAC can be deteriorated. And the current WiMedia MAC standard has not considered QoS provisioning even though QoS parameters such as a range of service rates are provided to each traffic stream. Therefore, we propose Relay DRP protocol with QoS-based relay node selection criterion, which makes a relay path to avoid DRP resource reservation conflicts and guarantee QoS more stably through cross-layer link adaptation of cooperative relay transmission scheme and is compliant with the current WiMedia D-MAC protocol. Simulation results demonstrate performance improvements of the proposed method for throughput and QoS provisioning.

• Journal of the Korean Operations Research and Management Science Society
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• v.38 no.2
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• pp.179-196
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• 2013

This paper examines the difference in compensation structure between family firms and non-family firms in Korea. A manager's compensation is an important means of motivating a manager to make decisions for shareholders by mitigating conflicts of interest between them. However, the role of a manager's compensation can be weakened in family firms for the following reasons. First, a family member manager has fewer conflicts of interest, compared to a non-family member manager. Second, a family member manager has an intrinsic incentive to increase a firm's value (i.e., family wealth). Finally, a family member manager can monitor non-family member managers more effectively. For the reasons, the agency problem will be less severe in family firms and subsequently the role of compensation will be reduced. The empirical results show that pay-performance sensitivity is smaller in family firms than in non-family firms. The main result is robust to variations such as changes in family ownership, the definition of a family firm, and control variables. Furthermore, this paper compares the pay-performance sensitivity of Chaebol family firms with that of other firms. The result shows that the sensitivity is higher for Chaebol family firms, compared to that in other family firms and non-family firms.