• Structural Engineering and Mechanics
• /
• v.30 no.6
• /
• pp.651-664
• /
• 2008

The purpose of this study is to develop a rehabilitation technique for heavily earthquake damaged masonry buildings. A full scale one storey masonry building with window and door openings was manufactured and tested on the shock table by applying increased amplitude free vibration up to the point where heavy earthquake damage was observed. Damaged test building was rehabilitated with vertical and diagonal steel straps and then tested again. The effectiveness of improvements obtained by the rehabilitation technique was investigated. Steel straps improved the lateral strength and stiffness of masonry walls and limited the lateral displacement of building. Stability of the masonry walls were also improved by the steel straps. Steel straps reduced the natural period of the earthquake damaged masonry building and prevented the failure of the building at the same amplitude of free vibration.

• Child Health Nursing Research
• /
• v.24 no.4
• /
• pp.407-419
• /
• 2018

Purpose: The purpose of this study was to explore and describe the meaning and essence of a mother's experience of hospitalization of her newborn in the neonatal intensive care unit (NICU). Methods: This study employed a qualitative research design. An interview was conducted with a mother whose newborn was hospitalized in the NICU, and the data were analyzed using Giorgi's phenomenological method. Results: Five main themes and 19 formulated meanings were indentified. The 5 themes were 'drowning in pain', 'just look outside the glass door', 'being a pillar', 'a deepening attachment', and 'prepare for nurturing with hope'. Conclusion: The results of this study provided an in-depth understanding of the experience of a mother with a newborn in the NICU. These results can be used in the development of a nursing intervention program that provides psychological and emotional support to the mother and family.

• Journal of the Korean housing association
• /
• v.16 no.1
• /
• pp.89-95
• /
• 2005

This study aims to analyze interior spatial characteristics of Korean single-family house which were designed by architects. For that purpose, plans, pictures and data of Korean single-family 113 houses which appeared in architectural publications from 1998.7 to 2002.6. were collected. The results of this study are the followings; 1) the ratio of southern-facing is higher in living room and master bedroom than in dining room and kitchen; 2) spatial elements of master bedroom are bedroom, bathroom and dressroom, those of dining room and kitchen are dining room, kitchen and multipurpose room and those of family bathroom are bathroom and restroom; 3) the living room does not located in the center of the plan; 4) the ratio of exterior door is higher in kitchen and master bedroom than in dinning room and living room; 5) stairs located in hall, corridor, livingroom etc., 6) there are void spaces in about half of houses which were collected.

• Journal of Families and Better Life
• /
• v.18 no.2
• /
• pp.191-202
• /
• 2000

The purpose of this study was to clarify the wall components of Sarang-taechong in the upper class houses of Chosun dynasty. Physical trace method was used for this study. The samples were taken from the Sarang-taechong of 6 traditional Korean houses; Yunkyungdang, the ancient Chusa estate, Sunkyojang, Chunghyodang, Yangjindant, Unjorn. The makor findings were summarized as follows; 1) The common components of each wall were pillars, sanginbangs(upper horizontal beams), hainbangs (lower horizontal beams), door and windows. Changbangs(wood eave pieces that suported decoration blocks), changyos(a pice of wood fitted between the tops of pillars and upper tori cross beams), and morums(the top wainscot board laid horizontally between the bottom beam and the bottom portion of a window frame) were additional. 2) The composition of every south wall was symmetrical and the other threes were mixed symmetrical and asymmetrical. 3) The image of wall was classified-fine, strong, and modera e, according to the symmetry or asymmetry of wall composition, the width of each components, the kind of window.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.5 no.5
• /
• pp.170-177
• /
• 1997

In this study, an analysis technique using simple beam model for predicting structure crashworthiness of the passenger car side impacted with an angle by another passenger car was investigated. The simple model was composed of major beam-like side structure which carry almost all side impact load. A procedure of component collapse test, calculation of load carrying capability and dynamic simulation was carryed out sequentially. Transient dynamic algorithms and a computer program to simulate deformations and motions of the impacted car was developed. The developed procedure was applied to a 3 door passenger car side impacted with an angle of 75 degree and the analysis results show good agreements with the actual test results.

• Proceedings of the Korean Society for Technology of Plasticity Conference
• /
• 1996.06a
• /
• pp.75-86
• /
• 1996

Three-Dimensional finite element analysis is performed using PAM-STAMP for design evaluation of automotive back door inner panel die. Gravity process by blanks own weight, binder-wrap process, and drawing process in the forming operations are sequentially simulated with Virtual Manufacturing Method. The most valuable result in this research is that 3-D FEM analysis can be applied to the design evaluation of draw die in the die try-out, though effects of mesh size and drawbead resistance force on the numerical accuracy are much sensitive. For the intensive application to draw-die design and try-out, the experimental know-hows about the forming variables such as friction coefficient, punch velocity, drawbead force, etc are necessary.

• Journal of the Korean Wood Science and Technology
• /
• v.18 no.2
• /
• pp.8-15
• /
• 1990

This study was carried out to investigate the wood qualities for the end-use development of sycamore (Platanus occidentalis L.) grown in Korea. The results obtained were as follows: 1. The average length of wood fibers was l.56mm and the average width of annual rings was 9.5mm. It had very fast growth rate. 2. The specific gravity in air-dry was 0.66. The shrinkage and water absorption were relatively large. The shear and impact strengthes were very strong, while the compressive, tensile, and bending strengthes were weak in comparison to it's specific gravity. 3. The contents of ash, holocellulose, lignin were relatively high 0.74%, 83.08%, 28.79%, but that of pentosan was low 18.53%. 4. The expected uses of sycamore wood are plywood. fancy veneer, small furniture, musical instrument, door and window frame, tool handels, boxes, etc.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1997.05a
• /
• pp.153-158
• /
• 1997

This paper describes a formal safety analysis technique which is demonstrated by performing empirical formal safety analysis with the case study of beamline hutch door Interlock system that is developed by using PLC(Programmable Logic Controller) systems at the Pohang Accelerator Laboratory. In order to perform formal safety analysis, we have built the Z formal specifications representation from user requirement written in ambiguous natural language and target PLC ladder logic, respectively. We have also studied the effective method to express typical PLC timer component by using specific Z formal notation which is supported by temporal history. We present a formal proof technique specifying and verifying that the hazardous states are not introduced into ladder logic in the PLC-based safety critical system.

• Journal of the Korea Furniture Society
• /
• v.21 no.5
• /
• pp.432-438
• /
• 2010

The study aimed at investigating the terms for each type of the current household furniture and at analyzing a standard based on those terms researched for the furniture, not including kitchen and child furniture. The study was conducted in sales and R&D division of major furniture brands such as Jang-In Gagu, Borneo, and Livart by surveying their staffs, and then, the investigated names were classified according to similar criteria and it was finally analyzed by the definite standard of the names made. In the results, the following 5 standards largely play roles for the naming. First, name according to requirements, second, construction of door, third, materials, fourth, shapes, and lastly, function. Except for the terms of "Sobari" expressed only as Japanese and "living room cabinet of Extension-type" using Korean and English along, most of the names show furniture in detail, and the names from Hangeul, Korean alphabet and from the English have recently and drastically increased with the lifestyle change influenced from Western world.

• Journal of the Korean Society of Manufacturing Technology Engineers
• /
• v.6 no.2
• /
• pp.10-18
• /
• 1997

This paper presents the development of real-time estimation and control details for a computer vision-based robot control method. This is accomplished using a sequential estimation scheme that permits placement of these points in each of the two-dimensional image planes of monitoring cameras. Estimation model is developed based on a model that generalizes know 4-axis Scorbot manipulator kinematics to accommodate unknown relative camera position and orientation, etc. This model uses six uncertainty-of-view parameters estimated by the iteration method. The method is tested experimentally in two ways : First the validity of estimation model is tested by using the self-built test model. Second, the practicality of the presented control method is verified in performing 4-axis manipulator's assembly task. These results show that control scheme used is precise and robust. This feature can open the door to a range of application of multi-axis robot such as deburring and welding.