• Korean Journal of Childcare and Education
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• v.10 no.4
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• pp.51-69
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• 2014

To investigate the effects of story making activities by utilizing postmodern picture books on young children's creativity and story construction ability, this study targeted 21 five-year-old preschoolers in G daycare center and 18 five-year-old preschoolers in J daycare center located in J Gun, Busan City. 21 young children in G daycare center engaged in story making activities by utilizing postmodern picture books totaling 18 times for 12 weeks, and 18 young children in G daycare center, the comparison group, read postmodern picture books individually in free choice activity time. The results of the study are summarized as follows. Story making activities by utilizing postmodern picture books made statistically more significant progress in the subordinate elements of creativity and all the subordinate elements of story construction ability. That means those activities, by utilizing postmodern picture books, have a positive effect both on the development of young children's creativity and story construction ability.

• Korean Journal of Child Studies
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• v.18 no.2
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• pp.19-32
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• 1997

This study explored an alternative activity for the assessment of young children's literacy in Korea; namely, the evaluation of children's ability to construct meaning independent of decoding skill. The subjects were 78 children 4 to 5 years of age in Seoul. Instruments were the researcher's revised form of the Story Construction from a Picture Book, TRSR (Teachers' Ratings of Students' Reading) designed by van Kraayenoord & Paris (1996), and the revised form of the WLAT (Written Language Awareness Test, Kim, 1995). The assessment scores and oral responses of the children were analyzed by Pearson's r, MANOVA and one-way ANOVA, using repeated measures. The findings showed that (1) the story construction total scores were significantly correlated with WALT scores and the subcategory scores were intercorrelated with each other. (2) The story construction total scores differed by age, and (3) the 2 phase scores were higher than the 1 phase scores.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.05a
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• pp.97-98
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• 2006

This study proposes a method of generating steel house shop drawing in an automated design method, reducing construction manpower and period. With one hour fire-resistant approval code, reflecting work ability and efficiency, steel-framed house market is expected to extend from one or two story house to multi-purpose facilities up to four story height. More models have been constructed in this system than the first appearance of fire-resistant approval in Korea in 1997 Also, cost estimation of components such as frame walls, roof trusses and floors is obtained with shop drawings. Also, the lack of suppliers of steel framed house shop drawing and unstandardized drawing method get constructors have difficulty in understanding its design. In steel framed house industry, shop drawings are essential part in building and constructing framework and they have major effects on construction deadlines and expenses. By exploring method of shop drawing automation, this study aims to optimize work flow with a standardized drawing method. The proposed system can be applied to manufacturing automation in domestic industry of factory-built panelizing method in the near future.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.05b
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• pp.91-96
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• 2011

The flat slab is well-known as a structural system to reduce the story height, so it is broadly used for recent building. However, the normal RC flat slab is not appropriate for the long span, and the quantity of reinforcement bar and concrete is raised. Recently, the post-tensioning system has been introduced and used widely as an alternative method. Nevertheless, in Korea, it is not used broadly due to lack of the understanding and field experience. Especially, the post-tensioning system is hesitated to use due to uncertainty of construction ability and economics. This paper will introduce applicability to site and economics of unbonded post-tensioning system through construction examples.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.05a
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• pp.103-106
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• 2006

This study proposes a method of generating steel house shop drawing in an automated design method, reducing construction manpower and period. With one hour fire-resistant approval code, reflecting work ability and efficiency, steel-framed house market is expected to extend from one or two story house to multi-purpose facilities up to four story height. More models have been constructed in this system than the first appearance of fire-resistant approval in Korea in 1997. Also, cost estimation of components such as frame walls, roof trusses and floors is obtained with shop drawings. Also, the lack of suppliers of steel framed house shop drawing and unstandardized drawing method get constructors have difficulty in understanding its design. In steel framed house industry, shop drawings are essential part in building and constructing framework and they have major effects on construction deadlines and expenses. By exploring method of shop drawing automation, this study aims to optimize work flow with a standardized drawing method. The proposed system can be applied to manufacturing automation in domestic industry of factory-built panelizing method in the near future.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.64-65
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• 2017

The existing hot and cold water supply system have a few problems such as construct ability, damage of the building, maintenance and the unequal distribution of water supply flow. So the system has needs to be improved and the Flow Equal Distribution System(FEDS) in series connection has been innovated by Idin Lab which relieve the existing problems. Thus, the purpose of this study is aimed to show the merits of FEDS with an real example of construction site of Wirye Terrace, D builder. 1. FEDS enables builders to save construction cost as the system in series connection does not need to equip both allotters and loop piping system. 2. FEDS contains a cartridge of water saving function so it mainly reduce the unequal distribution of flow and sudden temperature deviation of hot water supply at the same time. 3. FEDS allows repairer to maintain the water supply system at the same floor that could get rid of disharmony between dwellers who live the upper/lower story of the same building. Therefore, the FEDS will be applied when the building is remodeled and constructed.

• Steel and Composite Structures
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• v.37 no.4
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• pp.463-479
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• 2020

Currently, there are many lateral resisting systems utilized in resisting lateral loads being produced in an earthquake. Such systems can significantly reduce the roof's displacement when placed at an optimum location. Since in the design of tall buildings, the minimum distance between adjacent buildings is important. In this paper, the critical excitation method is used to determine the best location of the belt truss system while calculating the minimum required distance between two adjacent buildings. For this purpose, the belt truss system is placed at a specific story. Then the critical earthquakes are computed so that the considered constraints are satisfied, and the value of roof displacement is maximized. This procedure is repeated for all stories; i.e., for each, a critical acceleration is computed. From this set of computed roof displacement values, the story with the least displacement is selected as the best location for the belt truss system. Numerical studies demonstrate that absolute roof displacements induced through critical accelerations range between 5.36 to 1.95 times of the San Fernando earthquake for the first example and 7.67 to 1.22 times of the San Fernando earthquake for the second example. This method can also be used to determine the minimum required distance between two adjacent buildings to eliminate the pounding effects. For this purpose, this value is computed based on different standard codes and compared with the results of the critical excitation method to show the ability of the proposed method.

• Korean Journal of Child Studies
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• v.27 no.5
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• pp.123-141
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• 2006

The phonemic awareness program included construction of 45 activities emphasizing various sounds in speech and letter names using a storybook. The subjects were thirty 1st and 2nd grade low-income(15 experimental and 15 control group) children attending an after-school program in Seoul. Pre- and post-tests assessed children's reading, self-concept, and learning motivation. The experimental group children had rich opportunity to deal with and discuss sounds, syllables, phonemes, and the Korean alphabet names during storybook reading, games, and play over a 12 week period, while the control group children were provided with worksheets, subject tutoring, and homework guidance. Results showed that the phonemic activities were an effective and useful way to enhance children's reading ability, self-concept, and learning motivation.

• Advances in Computational Design
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• v.1 no.1
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• pp.79-86
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• 2016

In this study, the three different meta-heuristics namely the Grey Wolf Optimizer (GWO), Stochastic Fractal Search (SFS), and Adaptive Differential Evolution with Optional External Archive (JADE) algorithms are examined. This study considers optimization of the planer frame to minimize its weight subjected to the strength and displacement constraints as per the American Institute of Steel and Construction - Load and Resistance Factor Design (AISC-LRFD). The GWO algorithm is associated with grey wolves' activities in the social hierarchy. The SFS algorithm works on the natural phenomenon of growth. JADE on the other hand is a powerful self-adaptive version of a differential evolution algorithm. A one-bay ten-story planar steel frame problem is examined in the present work to investigate the design ability of the proposed algorithms. The frame design is produced by optimizing the W-shaped cross sections of beam and column members as per AISC-LRFD standard steel sections. The results of the algorithms are compared. In addition, these results are also mapped with other state-of-art algorithms.

• Structural Engineering and Mechanics
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• v.75 no.4
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• pp.415-424
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• 2020

Recently, many structural damage detection (SDD) methods have been proposed to monitor the safety of structures. As an important modal parameter, mode shape has been widely used in SDD, and the difference of vectors was adopted based on sensitivity analysis and mode shapes in the existing studies. However, amplitudes of mode shapes in different measured points are relative values. Therefore, the difference of mode shapes will be influenced by their amplitudes, and the SDD results may be inaccurate. Focus on this deficiency, a multi-strategy SDD method is proposed based on the included angle of vectors and sparse regularization in this study. Firstly, inspired by modal assurance criterion (MAC), a relationship between mode shapes and changes in damage coefficients is established based on the included angle of vectors. Then, frequencies are introduced for multi-strategy SDD by a weighted coefficient. Meanwhile, sparse regularization is applied to improve the ill-posedness of the SDD problem. As a result, a novel convex optimization problem is proposed for effective SDD. To evaluate the effectiveness of the proposed method, numerical simulations in a planar truss and experimental studies in a six-story aluminum alloy frame in laboratory are conducted. The identified results indicate that the proposed method can effectively reduce the influence of noises, and it has good ability in locating structural damages and quantifying damage degrees.