• Journal of the Korean Recycled Construction Resources Institute
• /
• v.9 no.3
• /
• pp.236-245
• /
• 2021

It is very important for structure designer to understand the service life variation since a wide range of service life is evaluated with changing exposure conditions and design parameters. Recently, for zero-carbon, waste plastic has been used for fuel for clinker production and this yields increase in chloride content in cement. This study is for evaluation of changing service life in the concrete with increasing initial chloride content due to usage of plastic-SRF(Solid Refuse Fuel) considering various exposure conditions and design parameters. For this, 4 levels of initial chloride content were assumed, and the service life was assessed using LIFE 365 program considering various environmental conditions including 3 levels of surface chloride content. As for analysis parameters, critical/initial chloride content, blast furnace slag powder replacement ratio, W/B(Water to Binder) ratio, cover depth, and unit mass for binder are adopted. Service life decreases with increasing initial chloride content and a significant reduction of service life is not evaluated permitting up to 1,000ppm of initial chloride content. With increasing slag replacement ratio, a longer service life can be secured since blast furnace slag powder has the effect of reducing the diffusion of external chloride ions and fixing the free chloride. It is thought that increasing initial chloride content up to European standard is helpful for enhancing sustainability and reducing carbon emission. Though the reduction in service life due to an increase in the initial chloride content is not significant in slag-concrete with low surface chloride content, careful consideration for mixing design should be paid for the exposure environment with high surface chloride content.

• Journal of the Korea Institute of Building Construction
• /
• v.13 no.5
• /
• pp.491-497
• /
• 2013

The objective of the present study is to establish a straightforward mixture proportioning procedure for structural lightweight aggregate concrete (LWAC), and evaluate the selection range of the targeted dry density of concrete against the designed concrete compressive strength. In developing this procedure, mathematical models were formulated based on a nonlinear regression analysis over 347 data sets and two boundary conditions of the absolute volume and dry density of concrete. The proposed procedure demonstrated the appropriate water-to-cement ratio and dry density of concrete to achieve the designed strength decrease with the increase in volumetric ratio of coarse aggregates. This trend was more significant in all-LWAC than in sand-LWAC. Overall, the selection range of the dry density of LWAC exists within a certain range according to the designed strength, which can be obtained using the proposed procedure.

• Fashion & Textile Research Journal
• /
• v.14 no.5
• /
• pp.749-757
• /
• 2012

The purpose of this study is to consider the characteristics of Latin American style expressed in modern fashion. Latin American fashion has been overlooked the influences, scope and diversity of dress within this world culture region. So, this study aim to unravel the history and significance of Latin American fashion. As for the research methodology, to classify types of the Latin American fashion style theoretical study and content analysis for Vogue magazine has been undertaken. In this study, the term of Latin American fashion style refers to the dress of common characteristics involving Latin American culture. To inquire into the characteristics of the types, various cases has been searched through books, internet, and designer's collections. The results of this study can be summarized as followings. The major types of Latin American fashion style are Indio-ethnic style, tropical-exotic style, and latin-romantic style. First, Indio-ethnic style has been involving traditional costumes and patterns which are originated in ancient Mexico and Peru. Second, tropical-exotic style has been involving bright color, tropical fruit and African flower pattern, various textures, and relaxed silhouette which are inspired by free and easy culture in Brazil and the Caribbean. Third, latin-romantic style has been involving the mix of Latin American tradition and romantic detail such as see-through material, lace, ruffle, spanish flower motif. In conclusion, Latin American style on contemporary fashion is based on interest to cannibalize folk theme, technique, icons and exotic others.

• Journal of the Korean Society of Costume
• /
• v.50
• /
• pp.85-96
• /
• 2000

The study is aimed to analyse social and cultural background and to compare the changes of the cosmetic culture in Korea and the western countries accompanied by the developemnt os the cosmetic industry in the 20th century. The cosmetic culture of Korea has kept on changing adopting the new western style make up, These changes were very closely related with the current sociocultural environments and the developments of the cosmetic industry. The analysis and comparison of Korean cosmetic culture and that of Western countries can be summarized as following: Fistly the cosmetic culture of korea came out after Korean War through the improt of western movies. Secondly at the beginning of accommodation of the western concept of beauty the standards of beauty were confused with that of traditional make up. Thirdly in terms of the history of costumes in the western cosmetic culture the trend was feminine and curve lineal style in the 1910s straight and young style in the 1920s Young elegant curve lineal style and straight-line style replaced among themselves in every 10 years and the cycle became more rapid after the 1970s and there were diversity in the cosmetic culture affected by the postmodernism Fourthly the cosmetic culture of :total fashion" was taken into consideration. Fifthly the cosmetic culture of "total fashion" was taken into consideration. fifthly the make up of Korean and that of western countries are not only a way to express of aesthetic desire for beauty but sanitary management and it is a kind of an expansion of value for management for an inner self. Now is the time to refuse the attitude of accommodation of the western cosmetic culture without any consideration. We need to rediscover our traditional cosmetic culture and cultural distinctiveness and try to mix them with the western cosmetic culture in order to develop our own peculiar style which will be able to Korean design remain in the international stage and grow further.d grow further.

• Journal of Korean Society of Steel Construction
• /
• v.11 no.2 s.39
• /
• pp.223-232
• /
• 1999

For the design and maintenance of highways and road structures, the statistical data are needed for the vehicle, especially heavy truck crossing. So far, static weighing has been used but it needs fixed station, crews, and it takes a lot of time. Also truck mix and headway distances cannot be obtained. Bridge Weigh-In-Motion system uses the bridge as a weighing scale and collects the axle weights, axle distances. vehicle types and etc. without stopping or slowing down the vehicle. In this study, for the first time in the country, BWIM system is applied on steel I-girder bridge and its applicability is examined. Also data collected in this system is analyzed to get truck traffic characteristics including average daily truck traffic, weight distribution, typical truck configuration and overweight truck status. The results are compared with other data from weighing station and highway toll gates.

• KIEAE Journal
• /
• v.10 no.3
• /
• pp.117-125
• /
• 2010

Entering into the 21th century, the whole world is facing the various problems such as environmental disruption, resource exhaustion, and social isolation due to the consequences of population growth and economic development. Especially, as the world population is aging, the solutions for these problems are being suggested with a new paradigm of environmental design for sustainable society providing more affluent and safer life for them. Aging societies are experiencing the difficulty in pursuing persistent vitality of life when aged population is socially excluded, and communities are stagnant due to the decrease of economic activities. In other words, those factors are causing the problems of social sustainability associated with the vital duration of local society and communities. In order to develop successful environment for aging society, it is necessary for us to precisely review how advanced countries are changing their directions. Therefore, the purpose of this study is to examine current trends of the aging friendly environment and find out the measures to promote social sustainability under the crisis of aging society. For this purpose, using qualitative methods, this study analyzed the contents presented at a professional conference , that showed current trends clearly, into three dimensions of social sustainability; the social integration of senior living communities with local society, the vitality of the communities, and the invigoration of individual senior lives. As a result, this study found that the measures that attempt to enhance the social sustainability of aging population can be also used to invigorate the communities.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.35 no.5
• /
• pp.587-600
• /
• 2011

This study presents the strategic directions for Korean multi-brand fashion stores by running in-depth industry research and market analysis. Over 20 professionals were selected from Korean multi-brand fashion stores for this study and in-depth interviews were conducted to evaluate related subjects. The results of the study were as follows. First, Korean multi-brand fashion stores could be classified into three criteria: operating ownership, merchandise mix, and store identity. Second, operating ownership criterion was chosen for further investigations of strategies and directions of the multi-brand fashion stores. The operating ownership criterion consists of three types; department store types, specialty store types, and boutique types. Each type deploys different buying practice, organizational strategies, and distribution channels. Lastly, the suggested strategic directions for each type are summarized as follows. The 'department store type' should utilize its strong direct buying capabilities and acquisition of merchandising can be more effectively managed. The store should utilize its strong buying power as a tool to develop new private brands (PBs). For 'specialty store type', two key factors have been derived: market share expansion and positioning themselves to become a new distribution channel. To respond to these factors, the store needs to be perceived as a brand then diversify its business. Strengthening its brand will allow it to expand into a new distribution channel and also enable a strategic partnership with its competitor brands. The factors influencing 'boutique type' is personalization and uniqueness. With an emphasis on the uniqueness of products and merchandising it will be able to implement the role as a personal shopper and stylist to provide a very personalized service to its customers.

• International Journal of Highway Engineering
• /
• v.5 no.2 s.16
• /
• pp.1-14
• /
• 2003

This study is a fundamental research for developing self-deicing function of snow-melting asphalt concrete for roadway pavement. The objective of this study is to develop technology of making self-snow-melting asphalt pavement and evaluate properties of the asphalt concrete containing deicers. Asphalt concrete with deicers and CRM was produced by dry process. The $\alpha$-deicer, CRM and F-deicer were used for sand asphalt mixtures of thin-layer pavement on the existing pavement. The $\alpha$-deicer, $\beta$-deicer, CRM A, CRM B and C were used for 13mm dense-graded mixtures on surface course. Penetration grade of 60-80 asphalt was used for asphalt mixtures. Marshall mix-design, indirect tensile strength, freezing and thawing test, analysis of extracted water were carried out to evaluate performance of self deicing function of asphalt mixtures. The study result showed that snow-melting asphalt mixtures had not only good mechanical characteristics and good snow-melting function, but also chemically safe in environmental point of view.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.12 no.6
• /
• pp.1135-1142
• /
• 2017

In this paper, we propose an algorithm that can automatically mix the screen and sound by tracking the change of the sound data according to the screen change so that the real sound can be implemented in the personal broadcasting service. Since the personal broadcasting service is often broadcasted lively, it should be convenient to have a real-time mixing. Through experiments, it was confirmed that the sound pressure changes in a wide range in the high frequency band related to the clarity for understanding according to the rotation angle change of the screen. Regression analysis of the sound pressure changes at 2kHz, 4kHz, and 8kHz, The attenuation change of sound pressure was observed at the slope of -1.17, the slope of -2.0, and the slope of -2.44 for each frequency. Therefore, these experiment results can be applied to the VR service. This study is expected to be useful data in the implementation of personal broadcasting service.

• Journal of Preventive Medicine and Public Health
• /
• v.52 no.4
• /
• pp.258-264
• /
• 2019

Objectives: The perceptions of family-planning (FP) acceptors regarding contraception influence the reasons for which they choose to switch their method of contraception. The objective of this study was to analyze the perceptions of contraception and rationales for switching contraceptive methods among female FP acceptors in West Nusa Tenggara, Indonesia. Methods: This study involved the analysis of secondary data from the Improve Contraceptive Method Mix study, which was conducted in 2013 by the Center for Health Research, University of Indonesia. The design of the study was cross-sectional. We performed 3 stages of sampling using the cluster technique and selected 4819 women who were FP acceptors in West Nusa Tenggara Province, Indonesia as the subjects of this study. The data were analyzed using multiple logistic regression. Results: The predominant pattern of switching contraceptive methods was switching from one non-long-term method of contraception to another. Only 31.0% of the acceptors reported a rational pattern of switching contraceptive methods given their age, number of children, and FP motivations. Perceptions of the side effects of contraceptive methods, the ease of contraceptive use, and the cost of the contraceptives were significantly associated (at the level of ${\alpha}=0.05$) with rational patterns of switching contraceptive methods. Conclusions: Perceptions among FP-accepting women were found to play an important role in their patterns of switching contraceptive methods. Hence, fostering a better understanding of contraception through high-quality counseling is needed to improve perceptions and thereby to encourage rational, effective, and efficient contraceptive use.