• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.10a
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• pp.855-863
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• 2009

In this study, a beam-column junction type damper is proposed which saves the inner and outer space for the installation of damping devices and allows easy adjustment of control performance The result of the numerical analysis indicated that the displacement response and base shear of a single degree of freedom system by seismic load, El Centro 1940 was reduced with yield moment of the joint hinge and the specific yield moment ratio $\delta$ of the joint hinge existed for the optimal seismic performance. In addition, the dynamic nonlinear characteristics, effects of yielding and dependence of natural period of bi-linear system with the junction type damper is identified. The analysis of multi-degree of freedom system showed that responses of the controlled structures was reduced significantly as the number of a story increases and yield moment ratio decreases when the system is excited by seismic load and sine wave. On top of that, it was also observed that energy dissipation at the joint connected with the dampers was remarkable during excitation.

• Earthquakes and Structures
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• v.4 no.1
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• pp.63-84
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• 2013

A semi-active mass damping (SMD) system with magnetorheological (MR) dampers focusing on low- and mid-rise buildings is proposed in this paper. The main purpose of this study is to integrate the reliable characteristics of the traditional tuned mass damper (TMD) and the superior performance of the active mass damper (AMD) to the new system. In addition, the commonly seen solution of deploying dense seismic dampers throughout the structure nowadays to protect the main structure is also expected to switch to the developed SMD system on the roof with a similar reduction performance. In order to demonstrate this concept, a full-size three-story steel building representing a typical mid-rise building was used as the benchmark structure to verify its performance in real life. A numerical model with the interpolation technique integrated was first established to accurately predict the behavior of the MR dampers. The success of the method was proven through a performance test of the designated MR damper used in this research. With the support of the MR damper model, a specific control algorithm using a continuous-optimal control concept was then developed to protect the main structure while the response of the semi-active mass damper is discarded. The theoretical analysis and the experimental verification from a shaking table test both demonstrated the superior mitigation ability of the method. The proposed SMD system has been demonstrated to be readily implemented in practice.

• Wind and Structures
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• v.12 no.4
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• pp.313-332
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• 2009

This paper numerically and experimentally investigates the control performance of the active mass damper (AMD) systems in a 26-story high-rise building in use. This is the first full-scale application of the AMD system for suppressing the wind-induced vibration of a building structure in Korea. In addition, the AMD system was installed on top of the building already in use, which may be the world's first implementation case. In order to simultaneously mitigate the transverse-torsional coupled vibration of the building, two AMD systems were applied. Moreover, the H-infinity control algorithm has been developed to utilize the maximum capacity of the AMD system. From the results of numerical simulation using the wind load obtained from the wind tunnel tests, it was found that the maximum acceleration responses of the building were reduced significantly. Moreover, the control performance of the installed AMD system was examined by carrying out the free and forced vibration tests. The acceleration responses on top of the building in the controlled case measured under strong wind loads were compared with those in the uncontrolled case numerically simulated by using the wind load deduced from the measured data and a structural model of the building. It is demonstrated that the AMD system shows good control performance in reducing the building accelerations.

• Steel and Composite Structures
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• v.16 no.2
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• pp.135-156
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• 2014

In this research the effect of seismic design level as a practical approach for progressive collapse mitigation and reaching desired structural safety against it in seismically designed concentric braced frame buildings was investigated. It was achieved by performing preliminary and advanced progressive collapse analysis of several split-X braced frame buildings, designed for each seismic zone according to UBC 97 and by applying various Seismic Load Factors (SLFs). The outer frames of such structures were studied for collapse progression while losing one column and connected brace in the first story. Preliminary analysis results showed the necessity of performing advanced element loss analysis, consisting of Vertical Incremental Dynamic Analysis (VIDA) and Performance-Based Analysis (PBA), in order to compute the progressive collapse safety of the structures while increasing SLF for each seismic zone. In addition, by sensitivity analysis it became possible to introduce the equation of structural safety against progressive collapse for concentrically braced frames as a function of SLF for each seismic zone. Finally, the equation of progressive collapse safety as a function of bracing member capacity was presented.

• English Language & Literature Teaching
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• v.16 no.1
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• pp.209-233
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• 2009

Many difficult literary texts have been disregarded by the teachers as well as the students in the EFL context. The abridged version, however, has its pedagogical usability when viewed as an extension of the literary text like movies and comic strips. Legible abridgments boost up the critical mind among the learners by enhancing their involvement in responding more actively to each class. In addition, to study an abridged version makes the future teachers accustomed to use it as a usable material. Abridgment has its efficacy in the literary study, too: reader-response criticism and narrative scholarship. First, the learners' creative engagement to the text encourages them to draw their personal experiences which are made up of the basic storyline. Second, a personal experience linked to the story has a relationship to narrative scholarship proposed in contemporary ecocriticism. Narrative scholarship is a new academic trend that merges the writer's personal experience in physical surroundings with the text which describes the same or similar natural environment. The role of teachers is a key to succeed in the abridged version pedagogy. They can facilitate a web of learner, text, and social context by providing a friendly atmosphere to encourage students' active participation, as well as supplementary materials of the original text.

• Computational Structural Engineering
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• v.5 no.1
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• pp.91-96
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• 1992

Earthquake resistant design is evolutionary, and, although great progress has been made since seismic design was made mandatory by building codes, it is still not completely understood. In this paper, a 10 story steel building is analyzed and its results are compared by applying two different actual ground motions to the structure. 12 sets of Loma Prieta, California, earthquake data which occurred in 1989, and recorded 7.1 on the Richter scale and 9 sets of Valparaiso, Chile, earthquake data which occurred in 1985, and recorded 7.8 on the Richter scale were scaled to zone 2B level of UBC-88. By applying earthquake ground motions which had similar Richter scale magnitude, it was found that the Chile earthquake which had long duration of ground motion affected about twice bigger than that of California earthquake which had relatively short duration of ground motion. In addition to the peak ground motion, the duration of the ground motion is a very important factor in structural design.

• Fashion & Textile Research Journal
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• v.20 no.3
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• pp.257-265
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• 2018

This study investigated the colors of the costumes in the film 'The Handmaiden'. The author categorized and examined the hue and tone of the main character's costume as well as provided an adjective image surveyed from the standpoint of the audience in order find if the intended story of the director is delivered to the audience through costume colors. Study method analyzed 25 set costume colors of the heroine 'Hideko'. The color analysis were analyzed by capturing DVD images that showed the costume of 'Hideko'. The colors of costumes were analyzed by recognition through the eyes based on the IRI, Hue, and Tone 120. In addition, the analysis of the IRI adjectives image were conducted through the survey. Costume hue of the heroine 'Hideko' in the film 'The Handmaiden' were black, yellow, white, green, and purple. There were many colorful costumes in the movie. Tones were very pale, deep, bright, vivid, strong, and pale. Chroma were evenly distributed and brightness were distributed in the order high, middle, and low. They were interpreted as the intention of showing the situation and psychology of 'Hideko' in various scenes of the film through various costume colors. Color images of the film 'The Handmaiden' were classified as feminine, mature, classy, delicate, classic, noble, polished, refined, showy, western, mellow, pure, and decorative.

• Smart Structures and Systems
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• v.21 no.4
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• pp.521-535
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• 2018

The main purpose of this paper is to predict missing absolute out-of-plane displacements and failure limits of infill walls by artificial neural network (ANN) models. For this purpose, two shake table experiments are performed. These experiments are conducted on a 1:1 scale one-bay one-story reinforced concrete frame (RCF) with an infill wall. One of the experimental models is composed of unreinforced brick model (URB) enclosures with an RCF and other is composed of an infill wall with bed joint reinforcement (BJR) enclosures with an RCF. An artificial earthquake load is applied with four acceleration levels to the URB model and with five acceleration levels to the BJR model. After a certain acceleration level, the accelerometers are detached from the wall to prevent damage to them. The removal of these instruments results in missing data. The missing absolute maximum out-of-plane displacements are predicted with ANN models. Failure of the infill wall in the out-of-plane direction is also predicted at the 0.79 g acceleration level. An accuracy of 99% is obtained for the available data. In addition, a benchmark analysis with multiple regression is performed. This study validates that the ANN-based procedure estimates missing experimental data more accurately than multiple regression models.

• The Journal of Korean Academic Society of Nursing Education
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• v.23 no.2
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• pp.224-235
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• 2017

Purpose: This purpose of this study was to investigate the effectiveness of educational design according to Goal-based Scenario constituent elements such as educational goals, mission, cover story, role, scenario operation, resources, and feedback in simulation training. Methods: The subjects of this study were 130 nursing students in their senior year who enrolled in the simulation exercise I course. They were divided into a total of 10 groups in which less than 20 students were assigned. In order to verify the effectiveness of the simulation training through Goal-based Scenario instructional design, a design of non-equality control group was carried out. Results: The results of this study were as follows: Critical thinking (t=1.81, p=.073) and problem solving ability (t=1.79, p=.076), course satisfaction (t=8.61, p<.001) and academic performance (t=5.48, p=.001) were supported. Conclusion: This study applied a Goal-based Scenario simulation program to present clear objectives for simulating training and to advance learning methods that are appropriate to the current education environment. In addition, this study has significance in presenting an instructional model for various simulated practice education and can be used as useful basic data related to simulated training education.

• The Research Journal of the Costume Culture
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• v.7 no.3
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• pp.72-92
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• 1999

The purpose of this thesis is to review relationship between various expression method in modern make-up and the tendency of Neo-Avantgarde. In this paper, the author classified the distinctive characters in Neo-Avantagarde with Historicism, Decadence, Humor, and Inhumanism and explained innovation and creatio which is manifested in the late 1990\`s make-up by studying Neo-Avantgarde tendency expressed in modern make-up. The results are as follows. 1. The Historicism in modern make-up is expressed in Japanese Kabuki Make-up, Chinese Pecking Opera make-up, and Primitive mask Make-up in Africa. 2. The Decadence is manifested in Tattoo make-up which is expressing fetishism and fin-de-냗칟 image, and Snobism Make-up which is expressing selg-ostentation and eroticism with artificial nail and eyelash. 3. The humor appears to the Character Make-up copying the characters in doll plays, animation and juvenile story. In addition it is showed in Kitsch Make-up, which has vulagr, rustic and childish image by wearing so diffusive and cheap ornaments. 4. The Inhumanism is appeared in Graphic Make-up which is in the pursuit of the visual happiness. It includes simple geometrical type, drawing and coloring. It is also showed in Vampire Make-up, which means the make-up style mading horro, hizarrerie, and mistery by primary color(black and red) make-up. As the above, Neo-Avantgarde can account for the diversity and pluralism of contemporary make-up.