• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.109-115
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• 2013

This study targeted 501 the elderly ages 65 or over in three places including the Senior Welfare Center and the college for seniors located in Daegu City and Gyeongsangbuk-do. The study results on the preference for oral health care management items across different ages showed that the age group of 65~69 fluoride application; the age group of 65~74 scaling and education of brushing; the age group of 70~74 denture cleaning and maintenance; the age group of 75 denture production. In the relationship between the self-perceived oral condition and the items of oral health care management, respondents who currently have a poor oral condition or have greater chewing trouble, or have higher dry mouth, preference the manufacturing of dentures in most cases. Respondents who have a lower number of teeth or wear dentures preference dentures cleansing and management in most cases. Respondents who have shaking teeth or have frequent tooth pain preference tooth extraction. Since the preference for oral health care management items may differ by their age or oral condition, oral health management customized to each individual should be applied.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.6
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• pp.1004-1011
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• 2006

In this study, we have performed a systematic case study on troubles and diagnoses of passenger car's engine based on OBD. We have acquired 1,242 data in order to analysis accurate troubles' causes and apposite diagnoses. 128 data of them are got using OBD apparatus, and the rest of them are collected on related website. As results, distribution on trouble cases shows bad idling(32%), poor acceleration(21%), stop in running(19%), faulty start(11%), inferior fuel economy(9%), and insufficient power(8%) in order of magnitude. And in the systematic cases, it is not difficult to detect troubles in a single part. But we know that special apparatus such as multichannel scanner is needed in complicated troubles. Furthermore we think that the survey is continued in various ways for more systematic case study on troubles and diagnoses.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.678-687
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• 2014

Since the infants' skin is very weak and has poor adaptability to environment, they are vulnerable to dermatitis by chemicals. Organic cotton for baby wear with the same functions in inner and outer wears can be considered the most suitable fiber. Therefore, this study was to analyze products and colors of domestic and Japanese baby wear brands which use organic cotton. Of total six organic brands for baby wear, there are three domestic baby wear brands and three Japanese brands, and design colors of total 213 items were examined on the web. The results of comparative analysis showed that there were more Japanese brands than domestic brand in designs by uses. Color analysis showed that natural cotton color was preferred and YR colors are commonly used, but the colors of Japanese brands were widely distributed and those of domestic brands were relatively narrow.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.4980-4984
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• 2011

This study was attempted to identify the effect of thyroid cancer on ultrasonographic intention. Data was surveyed using interview and questionnaires by 205 subjects in a general hospital who was located in Seoul from December 13, 2010 to January 31, 2011. The results were as follows ; First, in the good self-conscious health status, 85.5% of the subjects had an intention for thyroid cancer ultrasonography according health habit was significantly higher than 70.0% of the subjects didn't have an intention for thyroid cancer ultrasonography($X^2$=6.73 p<.01). Secondly, the odds ratio of subjects with a good self-conscious health status was 2.53, had a higher intention to participate in thyroid ultrasonography than subjects with a poor self-conscious health status(95% Cl=1.39-12.7). In conclusion, we need to provide education to subjects in poorer health so that they will also participate in thyroid cancer ultrasonography. Active promotion should also be performed to elevate knowledge about the prevention of thyroid cancer.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.4788-4795
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• 2011

The purpose of this study is to present and review the possible effect of the learning paradigm shift from traditional method to ubiquitous learning, the societal issues that need to be address in order to design a new pedagogical platform trending from e-learning to m-learning and now the u-learning. That without the proper study of how learning environment may affect the learning process of an individual will lead to poor quality of education. This new era of learning environment offer a big opportunity for "anytime, anywhere" learning. Thus, Lifelong learning is at hand of everyone. Maximizing the benefit of new trend will be a great help and addressing the limitations will lead to quality education. The components that comprise the ubiquitous learning are also discussed together with the technologies that will make it possible. The research learning domains that are in progress which shows that the interest in pervasive or lifelong learning attracted the interest of many research institutions. The types of learning mode and learning modalities are also briefly discussed in this paper.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.5252-5259
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• 2011

Both Optimization and Reuse Technology are considered as core technologies handling the values of products in embedded software. Framework technology is a typical type of optimization and reuse technology. When we develop software based on framework, The effect of reusability as well as development productivity can be improved. However, currently the form of framework-based development is very poor in embedded software development. Furthermore, because framework development is also beginning stage in embedded software development, there are questions whether developing framework can bring reusability effect. In this paper, we propose metrics measuring reusability of framework which is designed for improving reusability of embedded software. As as result of applying proposed metrics into real design cases, we can obtain more effective results in framework-based design than existing design.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.3
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• pp.366-376
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• 2019

Youth unemployment reached a record high in 2017, and business revitalization is emerging as a means of overcoming this situation. The number of venture companies and amounts of new venture investments are increasing year on year, and the government has upgraded Small and Medium Business Administration to the Ministry of SMEs and Startups. However, the success rate of startups is relatively poor. Over the past three years only 39.1% of Korean startups survived and 90% of companies failed in the Valley of Death phase. Survival this phase is critical for early startups, and thus, the amount and timing of investments are critical. Current models for establishing business startups do not effectively attract investments because they lack practical, corporate evaluation variables. In this paper, we develop a mixed process that incorporates the factors and business models focused on by venture capital investors. In addition, we compared our Death Valley Venture (DVV) process with current methods and provide an example of its application.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.14 no.2
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• pp.78-87
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• 2018

Patients with mental disability who are classified as dental severely disabled, have poor oral health status and many difficulties in taking health services. The purpose of this study was to investigate factors of influencing in visiting oral health care services. After receiving approval from institutional review board in Seoul National University, 39 participants were recruited and the oral health examination and questionnaire were taken. Data were analyzed using one-way ANOVA, independent t-test, hierarchical linear regression for predicting influence of each participants' characteristics on oral examination time and care time. In regression model, the higher the disability grade and the lower the degree of cooperation, the more oral examination time increased. However possibility of communication was not significantly influenced. Also, the higher the disability grade and the lower the degree of cooperation, the more oral care time increased. However possibility of communication was not significantly influenced. These results are expected to provide objective data for introduction and establishment of visiting dental care.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.321-331
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• 2018

This study examined the life safety factor of residents living in a university village. The results of the study were as follows. First, previous research results and social safety-related research and practical system for a wide range of exterior space, including the driveway of the living space was a relative lack. Based on the survey results, the psychological factors that affect the life safety environment of the living space was found in the exterior space environment. Second, the living safety factors in the exterior space of a one-room residence can be shown by four types, such as occupant monitoring, residential surveillance and area classification, external public space utilization, and pleasant environment maintenance in the architectural planning dimension. Third, the results of research on the exterior space of the university one-room village, and life safety environment of exterior space, such as design of pedestrian street, revealed a very poor resident population and one-room buildings in most areas.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.9
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• pp.3885-3906
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• 2020

Hybrid fuzzing which combines fuzzing and concolic execution, has proved its ability to achieve higher code coverage and therefore find more bugs. However, current hybrid fuzzers usually suffer from inefficiency and poor scalability when applied to complex, real-world program testing. We observed that the performance bottleneck is the inefficient cooperation between the fuzzer and concolic executor and the slow symbolic emulation. In this paper, we propose a novel solution named EPfuzzer to improve hybrid fuzzing. EPfuzzer implements two key ideas: 1) only the hardest-to-reach branch will be prioritized for concolic execution to avoid generating uninteresting inputs; and 2) only input bytes relevant to the target branch to be flipped will be symbolized to reduce the overhead of the symbolic emulation. With these optimizations, EPfuzzer can be efficiently targeted to the hardest-to-reach branch. We evaluated EPfuzzer with three sets of programs: five real-world applications and two popular benchmarks (LAVA-M and the Google Fuzzer Test Suite). The evaluation results showed that EPfuzzer was much more efficient and scalable than the state-of-the-art concolic execution engine (QSYM). EPfuzzer was able to find more bugs and achieve better code coverage. In addition, we discovered seven previously unknown security bugs in five real-world programs and reported them to the vendors.