• Journal of Korean Association for Spatial Structures
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• v.21 no.4
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• pp.81-89
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• 2021

Recently, interest in OSC(Off Site Construction) is increasing due to the trend of a decrease in skilled workers and an increase in labor costs. In this regard, PC(Precast Concrete) is being reviewed for apartments, the most common type of housing in Korea. As the biggest concern for PC apartment houses, civil complaints such as inter-floor noise and leakage were presented. In this study, the details of the joints were reviewed based on the past cases of PC apartments, and the details of the recently constructed or planned PC apartments were investigated. Through this, the leakage path in the past was analyzed through the existing research literature and data. And wall type RC and PC apartment joint leakage test was performed and we found the needs for a detail of waterproof steps, sealant. Also, joint details were investigated for a rahmen type apartment housing under construction. At last, A discussion was conducted on the direction for a detailed proposal of an improved joint in the future.

• Journal of Korean Library and Information Science Society
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• v.49 no.1
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• pp.23-46
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• 2018

The purpose of this study is to examine the effect of providing books to elementary school students that match their personality type on their reading attitude. For this purpose, this study investigated among the 226 elementary school students that are enrolled in fourth, fifth, and sixth grade classes at the elementary schools located in Gyeonggido, South Korea. The personality type of the students was determined by the Enneagram test. In this study, students were given with books that match their personality type and the effect of the provision was investigated. Main results of this study can be summarized as follows. First, the fact that books that match their own personality type made the children curious about the books, evoking their interest in reading. Second, the children exchanged their books with those who have similar personality type after they finish reading. As a result, the children could be exposed to more diverse books. Third, the students were curious about what kind of books were given to those with different personality type. The students responded that they want to read all of the different types of books too.

• YAKHAK HOEJI
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• v.53 no.4
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• pp.206-216
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• 2009

3-Hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (Statins) are potent inhibitors of cholesterol biosynthesis. Cholesterol-lowering therapy using statins significantly reduces the risk of coronary heart disease. Various discovery of statins as bone anabolic agents has spurred a great deal of interest among both basic and clinical bone researchers. In-vitro and some animal studies suggest that statins increase the bone mass by enhancing bone morphogenetic protein-2 (BMP-2)-mediated osteoblast expression. Clinical and animal test results of statins focusing on the prevention and treatment of bone fractures was collected. Three independent literature searches were performed by using from January 1, 2002 to September 2008 for clinical and animal test results. Search term included statins, HMG-CoA reductase inhibitors, pleiotropic effects, fracture, osteoporosis and clinical and animal test. No consensus has been reached whether clinical use of statins has beneficial effects on bone health, partly due to lower statin concentrations because of first-pass metabolism by the liver. Experimental use of statins as stimulators of bone formation suggests that they may have widespread applicability in the field of orthopaedics. With their combined effects on osteoblasts and osteoclasts, statins have the potential to enhance resorption of synthetic materials and improve bone ingrowth. In conclusion, The use of statins in the prevention and treatment of bone fractures requires further study. But observational studies suggest that statins for decreasing bone fractures including osteoporosis have to be considered local direct administration like transdermal or subcutaneous type over oral adminstration.

• Journal of the Korean Society of Safety
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• v.11 no.1
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• pp.53-59
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• 1996

To protect the damages or the disasters caused by overheating of industrial electric equipments or electric home appliances, a temperature sensitive thermal fuse is generally used in those equipments. Thermal fuses cutoff the current flow when the temperature of the electric equipments are abnormally overheated and over the certain temperature. Therefore thermal fuse is one of the most important elements in the sense of safety. Thermal fuses are classified into two types according to thermally sensitive materials, a low temperature melting alloy and an organic chemical compound. Domestic products of thermal fuses are now only with an organic chemical compound. Domestic products tested by using cutoff test and aging test etc. are satisfied UL specification. It's shown that the accuracy and the precision of the domestic products are as good as those of the overseas products obtained UL mark. However, some of domestic products show the reclosing problem which is mainly related the safety. This problem should be solved to make the reliable thermal fuses. In this paper, our Interest is to find out the causes of reclosing. In the comparison between thermally sensitive materials occurred reclosing and those occurred no reclosing, the test effects show that the characteristics of emitting heat and absorbing heat are different.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.19 no.11
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• pp.8-15
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• 2020

The government has announced its Hydrogen Economy Roadmap to strengthen global competitiveness on the hydrogen economy by focusing on hydrogen fuel cell electric vehicles and fuel cells. In this regard, the interest on the economics and safety of the infrastructure of hydrogen stations has also increased. In this study, a test bed similar to an actual hydrogen charging facility was built, and a prototype of a piston-type compressor was modeled. In this model, the piston was hydraulically compressed to progressively test leakage, leakage rate, and durability and to check for any malfunction. Moreover, the leakage rate, cylinder leak performance, and compressor operation durability were evaluated for safety; it was confirmed that there were no abnormalities. Nevertheless, an investigation of the long-term use and operating pressure of the compressor is necessary to verify the safety of developing a100-MPa domestic compressor in the future.

• Journal of the Korean Society of Clothing and Textiles
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• v.12 no.3 s.28
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• pp.309-318
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• 1988

The purposes of this study were: 1) to develop specific AIO variables(clothing variables) based on clothing behavior studies, 2) to segment apparel market by clothing variables, 3) to discribe the profile of each segment with clothing variables, lifestyle variables and demographic variables, 4) to Suggest effective strategies on apparel market of women's clothing. The Likert Type clothing questionnaires measured 6 aspects of clothing (fashion, conformity-individuality, practicality, aesthetics, modesty and brand consciousness & status symbols) dealing with activities, interests and opinions. In addition, lifestyle variables were measured with general AIO statements. The questionnaires were administered to 563 young women (students, career women and homemakers) living in Seoul. The data were analysed by factor analysis, ctustering analysis, multiple discriminant analysis, one-way ANOVA ana Duncan's multiple range test. The results of the study were as follow: 1) 4 factors emerged from factor analysis of clothing variables. Factor 1: lower interest in modesty and higher interest in aesthics, Factor 2: brand consciousness and status symbols, Factor 3: conformity, Factor4 : fashion. 2) Lifestyle variables clustered into 3 factors. Factor 1: positive social activity, Factor 2: family-oriented type, Factor S: materialism. 3) By cluster analysis of the 4 factors of the clothing variables, the apparel market of women's clothing was categorised into 3 segments (innovative aesthetics seeker group, brand and status symbols conscious group, clothing unconscious group). 4) The above three segmented groups were also significantly discriminated by lifestyle and demosraphic variables. 5) On the basis of the findings, effective marketing strategies of women's clothing were suggested.

• The Journal of the Korea Contents Association
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• v.15 no.7
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• pp.170-180
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• 2015

With progress in emerging new media technology and associated device, there is growing interest in a new type of contents in the filed of children education. In this research, we developed a edutainment content for enhancing sociability and visual perception of children exploiting kinect. Recreating what is visually perceived with physical movement is adopted to develop visual perception. It is also designed such that one's sociability can be enhanced through experiencing natural physical contact and collaboration while interacting with the developed content. The prototype of the content was created through development of character to boost interest, a short animation for storytelling, and interactive programming. In the second pilot test which was done with the content improved through the first pilot test, it was observed that children easily played with it and actively participated in experiencing it. From this observation, it is expected that the developed content may work as a promising edutainment content which fosters children to enhance visual perception and sociability through natural interaction.

• Hwankyungkyoyuk
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• v.23 no.1
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• pp.36-49
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• 2010

The purpose of this study was to investigate whether elementary school parents' environmental literacy varied according to independent variables, to verify specific variables that affected their environmental literacy, and to analyze the correlation between elementary school students' and their parents' environmental literacy. Twelve elementary schools in Seoul and Gyeonggi-Do were chosen for purposive sampling. 342 questionnaires were used for analysis among the 350 questionnaires collected during the study, and their environmental literacy was measured through 55 questions consisted of 12 items for knowledge category, 22 for attitude category, 5 for behavior category, and 3 for skills category with 16 demographic variables. Statistical analysis was conducted on each of the variables that make up environmental literacy through mean t-test, F-distribution, Scheffe test, and Pearson correlation. The results of this study were as follows. (1) there is the difference according to age and career in parent's actual environmental literacy, but there is no difference in geneder, birthplace, residential type, religion and income. The parents in forties scored significantly higher than parents in thirties in subdomains of environmental skill and environmental interest in environmental literacy. And the parents with bachelor's degree scored significantly higher than parents with at least a high school diploma in subdomains of ecological knowledge, knowledge on environmental problems & issue, environmental skill and environmental behavior. (2) the most influential media on parents' environmental literacy is TV, then newspaper, internet and book follow. (3) the correlation between environmental crisis and environmental interest is the highest, but the mainly negative correlation is analysed between knowledge subdomains and other subdomains. (4) there is the correlation between elementary school students' and their parents' environmental literacy.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.425-433
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• 2020

Digilog book using augmented reality is a form that augmented reality is implemented by illuminating the camera embedded in the mobile image on the page registered as an image marker after downloading the application, which shows a fragmentary limitation in the content implementation method. Therefore, in this study, we proposed a pop-up multi-tracking method that enables two-way interaction in a digit log book using augmented reality technology. Through this, we commissioned an authorized agency to test the technical differentiation of augmented reality content for two prototypes of existing book-type Digilog Book and Pop-up-type Digilog Book. A test report was issued. The pop-up type digit log book suggested in this study enables the user to implement the interactive contents according to the user's action (movement). This can induce the interaction between the virtual image and the printed picture book and give the learner an interest and immersion, so that it is possible to express the interaction of the digital log book.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.30 no.4
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• pp.91-114
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• 2019

This study intends to classify the users by the MBTI personality type and investigate and analyze information resources and services of library preferred by personality type. Towards this end, we have surveyed the K University students on their personality types and preferred resources and services, and also attempted to explore the possibility of providing customized information services of university libraries according to the MBTI personality type based on the results. As a result of the study, it turned out that there was a significant difference in the preference of digital contents type in the analysis of the data type preference and the quadrant type through the analysis of attitude index type from validating the difference between data / information source and service preference according to the MBTI type. The analysis of 16 types of personality also demonstrated a significant difference in the perception of digital contents. Accordingly, In order to provide services for data and digital contents suitable for personality types in university libraries, it should be preceded by collecting MBTI personality type data for users in the library. After that, when a user requests a reference information service from a library, or requests a book or information, it is necessary to provide a form-specific service or provide a content-specific service.