• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.1009-1012
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• 2008

The fiber dispersion performance in fiber-reinforced cementitious composites is a crucial factor with respect to achieving desired mechanical performance. However, evaluation of the fiber dispersion performance in the composite PVA-ECC(Polyvinyl alcohol-Engineered Cementitious Composite) is extremely challenging because of the low contrast of PVA fibers with the cement-based matrix. In the present work, an enhanced fiber detection technique is developed and demonstrated. Using a fluorescence technique on the PVA-ECC, PVA fibers are observed as green dots in the cross-section of the composite. After capturing the fluorescence image with a Charged Couple Device(CCD) camera through a microscope. The fibers are more accurately detected by employing a series of process based on a categorization, watershed segmentation, and morphological reconstruction.

• Journal of Digital Convergence
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• v.13 no.9
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• pp.387-395
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• 2015

The aim of this study was to investigate effects of socio-demographic, household, social support, health-related factors on adolescent internet use time. Multiple regression analysis was conducted to examine factors affecting adolescent internet using time, and this study used the 2014 10th Korean Youth Health Risk Behavior On-line Survey data by Centers for Disease and Prevention. Results show that as for socio-demographic factors, being male, lower economic status, being middle school student, and having poor academic grade were; as for household factors, youth-led, one-parent, grandparent(s), multicultural, and North Korean defectors family were; as for social support factors, the absence of family support, the absence of friend support and the absence teacher support were; and as for health-related factors, less exercise, higher level of stress, and lower level of subjective happiness were associated with increased internet using time. Based on these results, convergent implications about effective intervention strategies that adolescents can use internet appropriately were discussed in the section of conclusion.

• Journal of Digital Convergence
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• v.16 no.7
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• pp.461-467
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• 2018

The purpose of this study was to identify the analysis of the difference between accident type and injury type on ski resort. In order to achieve this purpose, a total of 522 persons recorded in the safety accident logs of two ski resorts located in Gyeonggi - do in 2016-2017 winter season by the purposeful sampling method. Frequency analysis, chi-square test were executed using SPSS Statistics 21.0 Version. As the results, the following conclusion was derived. First, injury part differ statistically and significantly according to both socio-demographic variables(lesson experience). Second, injury type differ statistically and significantly according to both socio-demographic variables(event, lesson experience, event${\times}$age, lesson experience${\times}$gender). Lastly, both injury part and injury type differ statistically and significantly according to Slope course.

• Journal of the Korea Institute of Building Construction
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• v.22 no.5
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• pp.507-518
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• 2022

The purpose of this research is to obtain experimental data for developing a structural design of an external insulation system by evaluating the shear performance of a composite insulation system according to the adhesive type. The shear performance of the composite insulation system was experimentally evaluated by considering a simultaneous placement method, full and spot/edge coverage using adhesive mortar. As a result of the test, the shear strength of simultaneous placement and full coverage method was almost similar, the spot/edge coverage method was about 80% of them. Also, the simultaneous placement method is considered to be constructively advantageous when applied as an external insulation system to a high-rise building compared to using an adhesive mortar.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.507-517
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• 2013

Welfare desire has been diversified according to the increase of economic level and rapid social change. The desire for comprehensive service on culture, medical, mental and information level has appeared. Accordingly, it is necessary to establish an integrated community mixed-support facility, a space of accepting administration, welfare, leisure, culture and informatization request in a small local community in the future. The community mixed-support facility is a meeting place of local resident for information change, various basic service and ultimately for activation of community in order to contribute to regeneration and activation of existing urban core. Thus, this study figured out general status of community mixed-support facility and physical mixed type and analyzed spatial characteristics. Current community mixed-support facility has insufficient program and space to participate in by local residents and to accommodate mixed function. The future planned community mixed-support facility must secure multiple opportunities for various types of life by returning time and cost to user through the introduction of creative mixed concept. While reflecting unique local characteristics, and considering diversity of users, it needs to make mixed facility to cope with social changes. This study is limited in that the study reached a conclusion by survey and analysis only. However, it is expected that the result can be used as basic research data for the planning of community mixed-support facility to cope with living conditions of local residents or realistic requirements.

• Journal of Korean Society of Forest Science
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• v.108 no.3
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• pp.429-439
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• 2019

The objectives of this study were to gauge the extent of the forestry business through establishing the definition of forestry industry from the perspective of economic convergence and to analyze key components that affect each growth phase of a forestry business entity by classifying them. A total of 1,397 "sixth-sector industry" management entities were certified by the Ministry of Agriculture, Food, and Rural Affairs in South Korea from 2012-2017. Of these, 259 (18.5%) were in the forestry sector. In this study, the 259 forestry management entities were further classified into three phases based on sales distribution: entrance, development, and maturity. The entrance phase (<100 million KRW), development phase (>100 million and <1 billion KRW), and maturity phase (>1 billion KRW) constituted 33.2%, 55.4%, and 12.4% of the total 259 entities, respectively. The results showed that most of the management entities were either in the entrance or development phases, and only a small portion was in the maturity phase. To identify the key variables that affect each of the phases, chi-square analysis was used. We designed the "sixth-sector industry" type as an independent variable, whereas selected region, business organization, manager age group, forest product, processing type, and service type were designated as dependent variables. The results of the analysis showed that the processing and service types influenced all three developmental phases. Moreover, as the phase advanced, processing type showed a higher proportion of health-functional ingredients, such as powder or extract from forest products, which enable to develop and produce a variety of products. Service type also changed from simple experience to integrated experience tourism and finally to tourism education. Distribution and sales channel also turned out to be a significant factor during the development phase. This study provides the basic information needed to guide government support in the implementation of a formal forestry business through convergence as well as to increase the efficiency of business management.

• The Journal of the Korea Contents Association
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• v.17 no.11
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• pp.364-370
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• 2017

Creative thinking and fusion diversity of the performing arts pursue the settlement of empirical value realization by assuming new communication by genre. This new value and communication can create a type of collective intelligence with a different attempt based on the individual communication and horizontal thinking of the masses. Therefore, the empirical value and communication of the 21st century convergence(fusion) performing arts is possible through new types and analysis, and also were understood as the horizontal creation structure of the artist. As a result, first, the concept of the right value of 'convergence' was perceived as empirical communication depending on the empirical thinking ability of genre artists. Second, off-genre and collaborative tendencies are due to cooperation based on intellectual ability and recognition of horizontal communication by genre. Third, in the collaboration, the public's individualized communication ability and universal communication recognition should be premised and perceived the empirical definition about the collective intelligence. In conclusion, it is concluded that empirical value and communication of convergence performing arts enable to the experimental creation of collective intelligence, and that the relationship structure extends to a meaningful transition of convergence interpretation and expression of performing arts.

• Design Convergence Study
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• v.16 no.3
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• pp.69-84
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• 2017

Service blueprint is used to show the interaction between each service element at a glance and to understand the flow of the whole service centering on the customer at the stage of proposing a new service system. It was proposed in the 1980s before online business was developed. However, current services are changing in a way that provides various forms and channels, and the service blueprint seems to be not enough. To reflect this problem consciousness, we selected PSS among diversified service business models and propose a service blueprint type optimized for each business. After collecting 137 PSS cases to be used in the research, we made a business matrix and classified the cases and selected two representative cases to conduct two experiments. As a result, six types of service blueprint corresponding to the matrix could be derived: online service type, online remote support type, self rental type, online order type, traditional type, and offline support type. The validity of the proposed types of service blueprint was verified to confirm the suitability of those types.

• Journal of Digital Convergence
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• v.14 no.12
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• pp.323-333
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• 2016

This study investigates convergent influence on job seeking stress and its association with self esteem, hopelessness, depression, locus of control and type A behavior pattern among some college women. The survey was administered to 531 college women in Jeonbuk area from March 28th to April 29th, 2016. The structured self-administered questionaries were used. The results of hierarchical multiple regression analysis show the following. The job seeking stress of respondents turned out to be significantly higher in following groups: a group in which self esteem is lower and groups in which hopelessness, depression, external locus of control and type A behavior pattern are higher. Their explanatory power was 43.2%. With the analysis of covariance structure, we could confirm relationship among the four factors such as self esteem, hopelessness, depression, locus of control, type A behavior pattern and job seeking stress. The results of the study indicate that the efforts, to increase self esteem, and to decrease hopelessness, depression, locus of control and type A behavior pattern, are required to reduce the job seeking stress of the college women. The results are expected to be useful for the development of program and policy to decrease the job seeking stress of the college women. In the following study, the analysis about additional factors of influence on job seeking stress will be needed.

• Journal of the Korea Computer Industry Society
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• v.5 no.4
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• pp.461-470
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• 2004

This paper is to design the user interface of the groundwater well based on an object oriented. In order to implementation geographic data base of the an complex geo-object of the real world, this paper is the study of analysis pattern at the level By specifying the pattern appropriate to the application domain and designing the analysis pattern using the UML based on the object oriented methodology, this paper shall contribute to enhance the reuse of components that can develop and distribute a large scale open system.