• Structural Engineering and Mechanics
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• v.87 no.3
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• pp.201-210
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• 2023

This paper investigates the flexural behavior of reinforced recycled aggregates concrete (RRAC) beams after exposed to high temperatures. The experimental results from 17 specimens were present and compared with temperatures, recycled coarse aggregate (RCA) replacement percentages, and concrete strength as variables. It was found that the high temperature would not cause an observable change in the failure pattern. However, high temperature can significantly reduce the stiffness and ductility, and accelerate the damage degradation of specimens. After exposure to 600℃, the ultimate bearing capacity of the specimens decreased by 20%-30% The mechanical properties of RRAC beams after high temperatures were barely impacted by the replacement percentages. Increasing the concrete strength of RCA could effectively improve the bearing capacity and peak deflection of RRAC beams after exposed to high temperatures. Furthermore, the calculation method of the bending bearing capacity and deflection of RRAC beams was also discussed.

• Advances in concrete construction
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• v.9 no.3
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• pp.289-299
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• 2020

To investigate the long-term behavior of eccentrically loaded RC columns, which are more realistic in practice than concentrically loaded RC columns, long-term eccentric loading tests were conducted for 10 RC columns. Test parameters included concrete compressive strength, reinforcement ratio, bar yield strength, eccentricity ratio, slenderness ratio, and loading pattern. Test results showed that the strain and curvature of the columns increased with time, and concrete forces were gradually transferred to longitudinal bars due to the creep and shrinkage of concrete. The long-term behavior of the columns varied with the test parameters, and long-term effects were more pronounced in the case of using the lower strength concrete, lower strength steel, lower bar ratio, fewer loading-step, higher eccentricity ratio, and higher slenderness ratio. However, in all the columns, no longitudinal bars were yielded under service loads at the final measuring day. Meanwhile, the numerical analysis modeling using the ultimate creep coefficient and ultimate shrinkage strain measured from cylinder tests gave quite good predictions for the behavior of the columns.

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.6
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• pp.907-917
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• 2000

Although interest in the potential and actual usage of the Internet as a transaction medium is increasing, the market for fashion merchandise on the Internet in Korea has yet to take off. As the Internet environment is expected to bring about a transformation of conventional consumer buying behavior, the purpose of this exploratory research is to investigate the buying behavior of fashion products on the Internet to identify relevant concepts and generate hypotheses for further empirical research. The research methods selected for the study were observation and in-depth interview. Twelve subjects who had purchased fashion products on the Internet were selected and interviewed. Those who could not participate in face-to-face in-depth interviews because of the geographic locations were interviewed on-line. The results are as follows: First, subjects went through the stages of shopping motivation stage, site choice behavior stage, in-site behavior stage, and postpurchase behavior stage. Second, a model was extracted for each shopping stage, and a final model was completed based on comparisons with the participants processes. The information content of each phase was discussed. Finally, each participant was classified using their purchasing process, revealing six possible mixed usage patterns of the Internet marketing system and the traditional marketing system.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.05a
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• pp.125-130
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• 2007

Recently, the paradigms of residential planing are changing by digitalization, diversity and globalization. Since the infortance of residential living behavior and lifestyle have been recognizing, house can be perceived as a lifestyle engineering product which realizes lifestyle in a concrete way. The purpose of this research scrutinizes lifestyles through resident's value and preference of everyday living behavior in the residential, special contact. This research was conducted through the small group workshop to housewives divided into three groups such as the age 30-40s, 45-55s, 60-70s group. The workshop consisted of three stages, such as the awareness of family and home, the satisfaction of residential space, the value and preference of everyday living behavior. This study shows that Lifestyle characterize by ages, differences of living pattern and individual traits. The 30-40s' housewives relate to foster of a preschool child and it makes load of household. their characteristic is the preference of rest as releasing stresses. The 44-55s' housewives have self-oriented traits. they pursue own space and interaction with others. The 60-70s' housewives require natural interaction with family more than private space and an open view.

• Journal of the Korea Institute of Building Construction
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• v.4 no.3
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• pp.133-141
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• 2004

The object of this study is to investigate experimentally the shear behavior of reinforced concrete beams using recycled coarse aggregate. At first, the specimens are manufactured for the compressive strength of 210kgf/$\textrm{cm}^2$ with recycled coarse aggregate ratio of 0%, 20%, 40%, 60%, 80%, 100%, respectively. From the results, Reinforced concrete beams using recycled coarse aggregate were made with recycled coarse aggregate ratio of 0%, 20%, 40%, 60%, 80%, with stirrups and recycled coarse aggregate ratio of 0%, 20%, 40% without stirrups. The results of crack pattern and failure mode, load-displacement curve(center point and load point) and load-steel curve(compressive, tensile, stirrup) were analysed. It is concluded from the test that the shear behavior of recycled concrete beams is determined to have similar behavior of normal concrete beams. Therefore, from this study the application of recycled concrete to concrete structures may be possible. But, for using the recycled concrete widely, it is expected that the more studies on quality control, substitution ratio and mix design related with recycled concrete are necessary.

• Journal of Power System Engineering
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• v.1 no.1
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• pp.70-79
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• 1997

Ni-base self-fluxing alloy powder particles were flame sprayed onto the SS400 mild steel substrate surface. The effects of both substrate temperature and spraying distance on the splat behavior of sprayed particles were examined. The results obtained are summarized as follows: 1) In the splat behavior of Ni-base self-fulxing alloy particles sprayed onto the SS400 mild steel substrate, splashing was observed under the room temperature condition. On the contrary, it showed circular plate pattern in the substrate temperature range over 373K. 2) It was cleared that there was close relationship between mechanical properties of coating layer and splat behavior of sprayed particles. 3) From the experimental results, optimum spraying conditions showed excellent mechanical properties in the case of Ni-base self fluxing alloy sprayed onto the SS400 mild substrate were 473K of substrate temperature and 250mm of spraying distance.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.2
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• pp.106-112
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• 2007

Recently the crowd environment in the department of the animation is necessary to the digital industry. The goal of researching a proper crowd animation is to design character animation that is defined by the reality of scenes, performance of system and interaction with users to show the crowd vividly and effectively in cyber underwater. It is important to set up the crowd behavior patterns to represent for moving crowd naturally in cyber space. In the paper, we expressed the behavior patterns for flocks of fish in cyber underwater, and compared with the number of mesh, the number of fish, the number of frame, elapsed time, and resolution and analyzed them with the fish behavior simulating system.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.4
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• pp.795-805
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• 1997

The purpose of this study is to clearly understand the Korean consumer's socially responsible consumption attitude and disposition behavior through revealing by use Fishbein's Multi-Attributes Model as a conceptual frame, the relationship between the socially responsible clothing consumption attitude factors and disposition behavior pattern, and relations of demographic variables. Data were collected from the adult females residing in Seoul. Judgment Sampling were. performed twice during March of 1996 and total 549 sets of answers were used for final analysis. The result are following. First, by looking at the relationship between intrinsic side of socially responsible consumption attitude and disposition behavior, the attitude shows more economical disposition when consumers are in considerate about preservation of natural resources and clothing consumption and when consumers favor purchasing a second hand product, On the other hand, consumers' behavior shows more altruistic disposition, when they favor recycling and acquisition of second hand clothing and when not favor fashion. The result of analysis of relationship between the socially responsible clothing consumption attitude and demographic variables shows that income, age and education level relates to some intrinsic side of socially responsible clothing consumption attitude. On the other side, the analysis result shows that consumers with relatively lower education normally practice economical dispotion, while consumers with higher education level do altruistic disposition. Also, elder and married consumers tend to do more altruistic disposition.

• Journal of Fashion Business
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• v.13 no.3
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• pp.99-108
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• 2009

The purpose of this study is to analyze the middle-aged British women's apparel purchase behavior. The results of this study can be used to present the tendency of Korean middle-aged women's apparel purchase behavior when they become the old-aged by comparing and analyzing the British women's purchase behavior. We found that they prefer to choose and purchase their clothes by their own decision-making and search for actively the new brands for old age. Strong willingness was showed that their level of consumption amounts for clothing would be the same level between middle-aged and old-aged. It was also presented that they like to see a old-aged fashion model for fashion advertisement rather than a younger one and prefer to use the expression of 'mature' rather than a stereotypical expression such as a silver, gray and gold. The segmentation of fashion market by age can not be simply standardized. We expect that the propensity for clothing purchase behavior pattern of middle-aged women will not be changed and keep the same tendency by the time of their old-aged. We expect that this research results can be used as a basic material for another study and setting up the product developments and marketing strategies.

• The KIPS Transactions:PartD
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• v.16D no.1
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• pp.65-72
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• 2009

Component based development has increasingly become important in the software industry. However, in the current component based development approach with UML, the absence of behavioral description of components brings about a cost problem which causes semantic errors on the testing phase. Accordingly we cannot grasp the usage pattern of component by its provided interfaces which refer to an abstraction of software component. And we cannot guarantee the behavioral conformance of the provided and required interfaces of components. In order to solve these problems, we describe the behaviors of component interfaces by state machine diagram and guarantee their behavior conformance at the modeling phase. We also propose a method to guarantee the behavior conformance of component interfaces with concept of observation equivalence and invocation consistency. And we provide an analyzing tool which checks interface behavior conformance.