• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.9
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• pp.1531-1538
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• 2003

This paper compiles solutions of plastic $\eta$ factors and crack tip stress triaxialites for standard and nonstandard fracture toughness testing specimens, via detailed three-dimensional (3-D) finite element (FE) analyses. Fracture toughness testing specimens include a middle cracked tension (M(T)) specimen, SE(B), single-edge cracked bar in tension (SE(T)) and C(T) specimen. The ligament-to-thickness ratio of the specimen is systematically varied. It is found that the use of the CMOD overall provides more robust experimental J estimation than that of the LLD, for all cases considered in the present work. Moreover, the J estimation based on the load-CMOD record is shown to be insensitive to the specimen thickness, and thus can be used for testing specimen with any thickness. The effects of in-plane and out-of-plane constraint on the crack tip stress triaxiality are also quantified, so that when experimental J value is estimated according to the procedure recommended in this paper, the corresponding crack tip stress triaxiality can be estimated. Moreover, it is found that the out-of-plane constraint effect is related to the in-plane constraint effect.

• Journal of architectural history
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• v.16 no.2
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• pp.7-22
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• 2007

${\ddot{O}}d{\ddot{o}}n$ Lechner has been known as an architect who incorporates Hungarian folk motifs in creating a highly original Hungarian national style. Nevertheless, his work has been surprisingly neither exposed nor familiar to Korean audiences. This article attempts to reveal the unique characteristics of Lechner's architectural thought and ideas along with his buildings in Budapest. First of all, this article presents the evolution of Lechner's architectural thought by dividing his career into four marking periods. They are in chronological order to serve as a record of his architectural career. The authors then discuss his concern on the Hungarian ethnography in architecture while turing away from orthodox classicism. Subsequently, this article analyzes Lechner's three major buildings located at Budapest. By doing so, it attempts to expose his underlying design ideas and to shed light on the most elegant works of the architect. Finally, it marks out Lechner's influences on young Hungarian architects.

• Journal of architectural history
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• v.27 no.3
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• pp.27-42
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• 2018

This study aims to reinterpret Jeonggwanheon(靜觀軒) in terms of its use and architectural style after restoration work through the recently discovered [Deoksugung Palace's original plan](1915). It is presupposed that the existing interpretation of Jeonggwanheon, such as its status as the banquet hall of the Imperial Empire and the place where Emperor Gojong enjoyed coffee here, was a fantasy made from the transformation after the 1930s. When it was built around 1900, Jeonggwanheon arranged small and large rooms around the corridor in the center, and the porch surrounded the three sides of the building. From 1900 to 1907, there is no remaining record telling us who did what or when something happened in Jeonggwanheon except for several portraits of Emperor Gojong and his son which were drawn in 1902. The mixed use of brickwork and wooden porch are found in many of American style houses built in Incheon and Seoul at that time. Especially, the style and decoration of wooden porch seem to be influenced by Queen Anne style in the 19th century in America.

• Journal of Digital Contents Society
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• v.16 no.5
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• pp.835-847
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• 2015

Photo scanning can create point cloud and polygon models like 3D scanners bringing an object into the 3 dimensional world by combining several sheets of photographic information. The created data give us information about planes and sectional forms required for a 2 dimensional survey as well as 3 dimensional figures of buried cultural property. It requires a lot of time to record buried cultural property in the field, however, the photo scanning technique does not need additional equipment and manpower so the work may begin immediately while the property is protected. Moreover, it reduces financial burdens as it creates 3 dimensional data using images acquired by photography but provides the optimal condition to check 3 dimensional information quickly and easily.

• Journal of Korean Society of Archives and Records Management
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• v.8 no.1
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• pp.235-255
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• 2008

Present study conducted surveys and interviews to identify a solution to the issues concerning the work conditions, job satisfaction, and operational systems of archivists working in the Korean government agencies. Job characteristics were measured using the five-factor structures of Hackman and Oldham's(1976) Job Characteristic Models, professionalism, role conflict, stress, and turnover intentions. Job environment was measured in terms of communication, participation, social relations with coworkers and superiors, and job training. Job satisfaction was measured by general level of satisfaction, job meaningfulness, and commitment. Operational systems was analyzed in terms of organizational arrangement, role assignment, personnel management, and collaboration between the national archives and record centers. These analyses produced further implications and suggestions on personnel management of archivists and records managers.

• Journal for History of Mathematics
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• v.18 no.1
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• pp.11-32
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• 2005

This paper is a comprehensive study of mathematics education in the Chosun Dynasty. The basis of this work relies on actual historical records from the period. As shown in the records, mathematics education during the Chosun Dynasty remained at the level of basic arithmetics. The arithmeticians of the Chosun Dynasty did not have an understanding of more complex mathematical thought. But the simple arithmetics of the Chosun Dynasty facilitated the building up of a unique merchant 'middle class.' So this paper examines the development of mathematics in the Chosun Dynasty through middle class. Although the Chosun Dynasty arithmetics occupy a significant part of mathematics history, this paper details why their thought did not evaluate more advanced mathematical theories.

• IE interfaces
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• v.20 no.2
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• pp.177-185
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• 2007

e-Business in healthcare sector has been called e-Health, which is evolving into u-Health with advances of ubiquitous technologies. Seamless information sharing among health organizations is being discussed in many nations including USA, UK, Australia and Korea. Efforts for establishing the electronic health record (EHR) system and a nation-wide information sharing environment are called NHII (National Health Information Infrastructure) initiatives. With the advent of u-Health and progress of health information systems, information security issues in healthcare sector have become a very significant problem. In this paper, we analyze several issues on health information security occurring in u-Health environment and develop an information security standard for protecting health information. It is expected that the standard proposed in this work could be established as a national standard after sufficient reviews by information security experts, stakeholders in healthcare sector, and health professionals. Health organizations can establish comprehensive information security systems and protect health information more effectively using the standard. The result of this paper also contributes to relieving worries about privacy and security of individually identifiable health information brought by NHII implementation and u-Health systems.

• Communications for Statistical Applications and Methods
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• v.25 no.1
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• pp.15-27
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• 2018

Parametric method of flood frequency analysis involves fitting of a probability distribution to observed flood data. When record length at a given site is relatively shorter and hard to apply the asymptotic theory, an alternative distribution to the generalized extreme value (GEV) distribution is often used. In this study, we consider the beta-P distribution (BPD) as an alternative to the GEV and other well-known distributions for modeling extreme events of small or moderate samples as well as highly skewed or heavy tailed data. The L-moments ratio diagram shows that special cases of the BPD include the generalized logistic, three-parameter log-normal, and GEV distributions. To estimate the parameters in the distribution, the method of moments, L-moments, and maximum likelihood estimation methods are considered. A Monte-Carlo study is then conducted to compare these three estimation methods. Our result suggests that the L-moments estimator works better than the other estimators for this model of small or moderate samples. Two applications to the annual maximum stream flow of Colorado and the rainfall data from cloud seeding experiments in Southern Florida are reported to show the usefulness of the BPD for modeling hydrologic events. In these examples, BPD turns out to work better than $beta-{\kappa}$, Gumbel, and GEV distributions.

• Smart Structures and Systems
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• v.16 no.1
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• pp.1-26
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• 2015

Minimizing construction cost and reducing seismic damage are two conflicting objectives in the design of any new structure. In the present work, we try to develop a framework in order to solve the optimum performance-based design problem considering the construction cost and the seismic damage of steel moment-frame structures. The Park-Ang damage index is selected as the seismic damage measure because it is one of the most realistic measures of structural damage. The non-dominated sorting genetic algorithm (NSGA-II) is employed as the optimization algorithm to search the Pareto optimal solutions. To improve the time efficiency of the proposed framework, three simplifying strategies are adopted: first, simplified nonlinear modeling investigating minimum level of structural modeling sophistication; second, fitness approximation decreasing the number of fitness function evaluations; third, wavelet decomposition of earthquake record decreasing the number of acceleration points involved in time-history loading. The constraints of the optimization problem are considered in accordance with Federal Emergency Management Agency's (FEMA) recommended seismic design specifications. The results from numerical application of the proposed framework demonstrate the efficiency of the framework in solving the present multi-objective optimization problem.

• The Journal of Korean Medical History
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• v.32 no.1
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• pp.77-86
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• 2019

The Diary of Muk-Jae is a historical record that describes many social aspects of the Joseon period in the 16th century. It records many scenes of its author, Lee Mun-Geon, treating patients. This paper uses The Diary of Muk-Jae to examine changes in the perception of the concept of cold damage and the text of the Shanghanlun (Treatise on Cold Damage) in the Joseon period in the 16th century. In The Diary of Muk-Jae, cold damage is understood in connection with two categories: 'dangerous disease' and 'disease caused by cold'. The Diary of Muk-Jae also presents the Shanghanlun not as a work limited to the concept of cold damage, but as a medical text that could be widely used for many different diseases. Thus, The Diary of Muk-Jae may represent a point of transition between in the perception of cold damage as seen in the Uibang Yuchui (The Collection of Medical Procedures) of the 15th century and the Donguibogam of the 17th century.