• Smart Structures and Systems
• /
• v.25 no.3
• /
• pp.323-335
• /
• 2020

Magnetorheological elastomer (MRE), a smart material, is an innovative material for base isolation system. It has magnetorheological (MR) effect that can control the stiffness in real-time. In this paper, a new hybrid base isolation system combining two electromagnetic closed circuits and the roller bearing is proposed. In the proposed system, the roller part can support the vertical load. Thus, the MRE part is free from the vertical load and can exhibit the maximum MR effect. The MRE magnetic loop is constructed in the free space of the roller bearing and forms a strong magnetic field. To demonstrate the performance of the proposed hybrid base isolation system, dynamic characteristic tests and performance evaluation were carried out. Dynamic characteristic tests were performed under the extensive range of strain of the MRE and the change of the applied current. Performance evaluation was carried out using the hybrid simulation under five earthquakes (i.e., El Centro, Kobe, Hachinohe, Northridge, and Loma Prieta). Especially, semi-active fuzzy control algorithm was applied and compared with passive type. From the performance evaluation, the comparison shows that the new hybrid base isolation system using fuzzy control algorithm is superior to passive type in reducing the acceleration and displacement responses of a target structure.

• Cross-Cultural Studies
• /
• v.26
• /
• pp.445-463
• /
• 2012

Beltenebros is Antonio Mu?oz Molina's third novel. Its plot originates in a criminal act. Darman, the main character, arrives in Madrid to kill a traitor of the undercover organization to which he himself belongs. Treason is paid with death and Darman is in charge of the executions. The intricate story of espionage and intrigue is absorbing. Unlike other novels of the genre, in Beltenebros we can witness a unique psychological development of the main character. In his fiftieth anniversary, Darman becomes conscious of the painful and devastating effects of his criminal acts on the lives of the people he has crossed paths with. Then, for the first time, he acts like a Romanesque heroe by killing Valdivia-Ugarte, a deceitful mole who has been manipulating the strings of the plot to his own benefit. The story unfolds along an almost uniform progression of chronological time, only interrupted by random memories of a past that twenty years ago destroyed Walter's life, and in which Darman and the rest of the characters are all implicated. Few references to the Spanish Civil War inserted in the discourse are, however, of paramount importance as the depiction of a historical trauma, as a triggering force for the episodes of the novel, or as justification to Darman'scrimes as well as those of the clandestine Comunist Party. Indeed they were the victims of the conflict and the winners inflicted upon them hatred, repression, treason and disloyalty. As in other Mu?oz Molina's novels, the literary space, in this case Madrid, propels the development of the plot, and plays a protagonist role only equal to that of the main characters. It is in Madrid where Darman lives until he becomes prisoner of the enemy army, or where the symmetrical deaths of Walter and Andrade take place. Other spaces inhabit Madrid: the Universal Cinema, symbolic territory of the secret and hidden, where the story, as well as the relationships of the characters start and end the warehouse; or the Bo?te Tab? the nightclub that frequents Valdivia-Ugarte through secret passages connected with the Universal Cinema.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.38 no.4
• /
• pp.132-141
• /
• 2015

We focus on the fire scheduling problem (FSP), the problem of determining the sequence of targets to be fired at, for the objective of minimizing makespan to achieve tactical goals. In this paper, we assume that there are m available weapons to fire at n targets (> m) and the weapons are already allocated to targets. One weapon or multiple weapons can fire at one target and these fire operations should start simultaneously while the finish time of them may be different. We develop several dominance properties and a lower bound for the problem, and suggest a branch and bound algorithm implementing them. Also, In addition, heuristic algorithms that can be used for obtaining an initial upper bound in the B&B algorithm and for obtaining good solutions in a short time were developed. Computational experiments are performed on randomly generated test problems and results show that the suggested algorithm solves problems of a medium size in a reasonable amount of computation time. The proposed lower bound, the dominance properties, and the heuristics for upper bound are tested in B&B respectively, and the result showed that lower bound is effective to fathoming nodes and the dominance properties and heuristics also worked well. Also, it is showed that the CPU time required by this algorithm increases rapidly as the problem size increases. Therefore, the suggested B&B algorithm would be limited to solve large size problems. However, the employed heuristic algorithms can be effectively used in the B&B algorithm and can give good solutions for large problems within a few seconds.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.42 no.1
• /
• pp.143-150
• /
• 2019

We focus on the weapon target assignment and fire scheduling problem (WTAFSP) with the objective of minimizing the makespan, i.e., the latest completion time of a given set of firing operations. In this study, we assume that there are m available weapons to fire at n targets (> m). The artillery attack operation consists of two steps of sequential procedure : assignment of weapons to the targets; and scheduling firing operations against the targets that are assigned to each weapon. This problem is a combination of weapon target assignment problem (WTAP) and fire scheduling problem (FSP). To solve this problem, we define the problem with a mixed integer programming model. Then, we develop exact algorithms based on a dynamic programming technique. Also, we suggest how to find lower bounds and upper bounds to a given problem. To evaluate the performance of developed exact algorithms, computational experiments are performed on randomly generated problems. From the results, we can see suggested exact algorithm solves problems of a medium size within a reasonable amount of computation time. Also, the results show that the computation time required for suggested exact algorithm can be seen to increase rapidly as the problem size grows. We report the result with analysis and give directions for future research for this study. This study is meaningful in that it suggests an exact algorithm for a more realistic problem than existing researches. Also, this study can provide a basis for developing algorithms that can solve larger size problems.

• International Area Studies Review
• /
• v.16 no.3
• /
• pp.367-390
• /
• 2012

This thesis aims to analyzing the fact that how the Korean troops Intranet impacts on military service satisfaction to give something back to the community by doing time management, mental and physical health care of human resources who are in an army life in their 20's. This is full of suggestions as efficient operation of military service at the national and personal level. Also, this is able to be a guideline that provides useful information about self-discipline to new generation soldiers. This study regards it as meaningful to analyze causes that how the Korean troops Intranet impacts on military service satisfaction and provide information for effective utilization to new generation soldiers in their 20's consisted of the Internet generation at a military organization level. In conclusion, the Intranet has proved as important causes and tools that influence job satisfaction effectively. Also, the fact that the Intranet used in military organization should be developed to be useful to achieve their goal not to simple work or a means of transmission has came up.

• Journal of Digital Convergence
• /
• v.16 no.12
• /
• pp.51-60
• /
• 2018

This study would like to know the relationship among interpersonal competency based self-understanding and acceptance of others, self leadership, stress-coping and military adjustment. For this, 1289 military trainee in the army training station were surveyed. In results, The first, the acceptance of others did not have a significant effect on the perform-will, but had a significant effect on the job satisfaction and self leadership. The self-understanding had a significant effect on perform-will, job satisfaction and self leadership. The second, self leadership mediated between interpersonal competency and military adjustment. The third, in case of the perform-will, the moderating effect was showed in self leadership when the stress coping level was high. But in case of the job satisfaction, it was showed in both high group and low. Implications of this study is that the interpersonal competency based self-understanding and acceptance of others, self leadership and stress coping can be the positive potential variables on the military adjustment.

• Convergence Security Journal
• /
• v.18 no.2
• /
• pp.113-121
• /
• 2018

The The ROK military announced a reform proposal for the National Defense Reform 2.0 in 2018 in order to substantially guarantee the constitutional rights and human rights of the soldiers and to meet the demands of the military judicial reform. In order to establish a fair and independent military judicial system through such reforms, the Supreme Military Court was abolished to eradicate the controversy in the army and to abolish the system of the judges' And professionalism is systematically ensured so that judges can be judged only by law and conscience. This military reform proposal is so dramatic that it has a vocal voice of opposition, but the military should no longer be an exception to democracy and should try not to get caught in the stigma of human rights blindness.

• The Journal of the Korea Contents Association
• /
• v.21 no.6
• /
• pp.480-493
• /
• 2021

In this paper, we attempt to empirically explain the process by which fandom performs social participation using digital media. To do this, we utilize the concept of identification and the Situational Theory of Publics in a theoretical framework, and study ARMY, BTS fandom. We confirmed a positive association between communication behavior and social participation, and verified a mediating effect of the identification as well. Interestingly, horizontal identification, a fan-to-star friendly relationship, had a greater effect on moving toward social participation than did vertical identification, a fan's blind worship of a star. This study has significance in that it has figured out the relationship of personal feelings to public participation by mobilizing achievements in various research fields.

• Convergence Security Journal
• /
• v.20 no.4
• /
• pp.47-59
• /
• 2020

The Army, which is dreaming of a military leap forward through the fourth industrial revolution, needs to also consider the side effects and adverse functions of the fourth industrial revolution. In particular, this study conducted an analysis of whether it was consistent with the global technological trend of normal 'military security'. This paper focuses on the countermeasures that could result from 4th industrial revolution by utilizing the text-mining technique and social network technique of big data. 1. Active promotion of a convergence program with private, public, militaryand industrial, academic, and solidarity, 2. Information Sharing for International Cooperation and Cooperation in Cyber security, 3. Military Innovation and Military Unsymmetric Cyber security innovation, 4.The Establishment of Military Security Convergence Interface Management System in accordance with the Fourth Industrial Revolution, 5. Cooperation in the transition from technology engineering to social technology, 6. Establishing a military security governance system in the military, 7. Specifying confidential military digital data We look forward to providing useful information so that the results of this study can help develop the military and enhance military confidentiality.

• Fashion & Textile Research Journal
• /
• v.23 no.1
• /
• pp.118-128
• /
• 2021

This study used a preliminary survey to help develop an ergonomic flight jacket that is suitable for the working environment and mission performance. The results are as follows. The ergonomic sleeve pattern was designed with a forward 165° incline that considers a shoulder joint direction suitable for the motion; in addition, a closely design opening provided warmth and safety from fire. As a result of the dimensional suitability, pilots evaluated that sleeve length and total length of the developed flight jacket were a little long (p<.01), while flight engineers and crew evaluated that those of the developed flight jacket were appropriate (p<.01). Pilots evaluated that chest circumference and waist circumference were large (p<.05), while flight engineers and crews evaluated that those of the developed flight jacket were appropriate. The evaluation of the motion suitability indicated that pilots, flight engineers and crew found the developed flight jacket more comfortable than the current flight jacket (p<.05, p<.01, p<.001). The evaluation of the usability of pockets and penholders indicated that pilots, flight engineers and crew found the developed jacket easier to use (p<.01). The flight engineers and crew evaluated that the appearance of the developed flight jacket was better than the current flight jacket (p<.05). The results of this study show that the difference of environment and mission performance has a significant influence on evaluation; therefore, it is necessary to develop separate military uniforms that included a winter flight jacket to reflect the needs of each group.