• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.2
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• pp.89-103
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• 2020

As we face an aging society, the demand for personal mobility for disabled and aged people is increasing. In fact, as of 2017, the number of electric wheelchair in the country continues to increase to 90,000. However, people with disabilities and seniors are more likely to have accidents while driving, because their judgment and coordination are inferior to normal people. One of the causes of the accident is the interference of personal vehicle steering control due to unbalanced road surface conditions. In this paper, we introduce a encoder type semantic segmentation algorithm that can recognize road conditions at high speed to prevent such accidents. To this end, more than 1,500 training data and 150 test data including road surface damage were newly secured. With the data, we proposed a deep neural network composed of encoder stages, unlike the Auto-encoding type consisting of encoder and decoder stages. Compared to the conventional method, this deep neural network has a 4.45% increase in mean accuracy, a 59.2% decrease in parameters, and an 11.9% increase in computation speed. It is expected that safe personal transportation will be come soon by utilizing such high speed algorithm.

• Journal of the korean academy of Pediatric Dentistry
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• v.37 no.1
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• pp.109-116
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• 2010

Impaction is defined as a cessation of the eruption of a tooth caused by a clinically or radiographically detectable physical barrier in the eruption path or by an ectopic position of the tooth. The reasons for impaction of the maxillary central incisor are supernumerary tooth, odontoma, ectopic position of tooth germ, dilacerated tooth and so force. Impacted tooth cause space loss due to proximal movement of adjacent tooth, malocclusion, root resorption of adjacent tooth, cyst formation, so careful observation and early detection is important and exact treatment should be applied to prevent these results. The treatment options of impacted tooth include induction an eruption through extraction of deciduous tooth or surgical exposure, reposition of impacted tooth by surgical method or orthodontic treatment. Orthodontic traction is recommended when an eruption does not happen after removal of barrier or surgical exposure, when eruption path is too transpositioned to be corrected spontaneously so eruption does not expected. In these cases, traction of impacted maxillary central incisor was carried out using orthodontic method with closed eruption technique and it showed good clinical results so we report these cases.

• Journal of Korean Home Economics Education Association
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• v.20 no.4
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• pp.59-75
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• 2008

This study is designed to support the development and the teaching of revised curriculum of 2007 "Technology & Home Economics" by investigating the actual condition and the necessity of education for elderly housing education. Questionnaire survey was conducted with 488 high school students in Gyeongnam in 2008. The data analyzed by descriptive statistics, t-test, One-way ANOVA, Duncan's multiple range test by using SPSS 14 program. The results showed that most of the students were dissatisfied with their middle school education of elderly housing due to the lack of interesting and practical contents. Thus, various teaching-learning methods where student can experience and experiment is needed. Also, the students demanded more of factors of elderly housing, spacing plan, elderly welfare service and less of three-generation housing and senior housing in their elderly housing education. The needs of education contents differed among students depending on variables such as sex, graduated middle school, household income, dwelling space and length of residential years. Therefore, revised 2007 curriculum of "Technology & Home Economics" should include required contents in related chapters. Because there are significant differences among textbooks about elderly housing, further attention needs to be paid to the new textbooks in order to include education contents evenly. At the same time, teachers should organize their teaching contents considering the divergence of variables. The effect of elderly housing education will be maximized if the revised curriculum consists of more experimental activities such as elderly simulation in the local community.

• Korean Journal of Construction Engineering and Management
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• v.14 no.3
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• pp.107-114
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• 2013

The interest in traditional Korean housing has greatly increasing in Korean housing market. However, it is difficult to wildly disseminate for a high construction cost reason. In order to effectively facilitate the Hanok construction, Korean government has initiated a project that develops a new style Korean housing, which meets the requirements of low cost and modernized life style. Cost of building is mainly affected by materials and construction methods. Hanok has some special commodities those significantly impact the cost. In order to effectively cut down the costs, well-organized planning for costs is very important. Also, improving the productivity by utilizing new materials and methods can result in cost down. In this context, this paper compared and analyzed two different types of Korean housing; one is a modernized Korean house which used new materials and methods, the other is a traditional Korean house which was build up by purely traditional methods. Productivity has also been compared and analyzed for 5 major commodities between two types of models. Based on these comparative data, effect of cost down by new model has been analyzed. As a result it is confirmed that by using the new materials and methods could highly effect to increasing productivity and cost down. Especially, the cost of Roofing have been more influenced by using new material while the Wood and Finishes have been influenced by new construction method. Construction cost of Foundation (Earthwork, Concrete, Masonry) and Openings were influenced both factors, changing of materials and methods.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.5
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• pp.1135-1144
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• 2018

An electric wheelchair used to be utilized as a piece of equipment for the disabled and the elderly in the past, but the recent changes to its functions and forms have made it available across various fields and purposes. In this paper, we propose a continuous track type of electric wheelchair prototype to be used in various fields and environments and a monitoring system to control it. A frame stress design was applied to improve its stability during driving compared with the previous wheelchairs. In addition, we provide a convenience for free and easy operation of them using the App. based on android. A monitoring system based on C# was also added to control a large number of electric wheelchairs. As a result of the implementation and performance evaluation, the von Mises stress value was measured 4.401% within the normal range through five times of stress interpretations, and its accuracy of communication for system manipulation was recorded about 98.75%, which means that it has been proven to be safer than the previous wheelchairs.

• Journal of Korean Society of Transportation
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• v.27 no.5
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• pp.97-111
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• 2009

Image-based traffic information collection systems have entered widespread adoption and use in many countries since these systems are not only capable of replacing existing loop-based detectors which have limitations in management and administration, but are also capable of providing and managing a wide variety of traffic related information. In addition, these systems are expanding rapidly in terms of purpose and scope of use. Currently, the utilization of image processing technology in the field of traffic accident management is limited to installing surveillance cameras on locations where traffic accidents are expected to occur and digitalizing of recorded data. Accurately recording the sequence of situations around a traffic accident in a signal intersection and then objectively and clearly analyzing how such accident occurred is more urgent and important than anything else in resolving a traffic accident. Therefore, in this research, we intend to present a technology capable of overcoming problems in which advanced existing technologies exhibited limitations in handling real-time due to large data capacity such as object separation of vehicles and tracking, which pose difficulties due to environmental diversities and changes at a signal intersection with complex traffic situations, as pointed out by many past researches while presenting and implementing an active and environmentally adaptive methodology capable of effectively reducing false detection situations which frequently occur even with the Gaussian complex model analytical method which has been considered the best among well-known environmental obstacle reduction methods. To prove that the technology developed by this research has performance advantage over existing automatic traffic accident recording systems, a test was performed by entering image data from an actually operating crossroad online in real-time. The test results were compared with the performance of other existing technologies.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.4
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• pp.508-515
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• 1998

An antihypercholesterolemic effect was observed by intraperitoneal injection of the seaweed Porphya yezoensis extract. Hypercholesterolemia was induced by intraperitoneal injection of Triton WR-1339 (600 $\mu$g/g-body weight) into a mouse. Maximum level of blood cholesterol was reached at 20 hours after Triton injection. By simultaneous injection of the p. yezoensis extract (30 $\mu$g/g-body weight) with the Triton into each right and left sides of the peritoneal cavity, levels of total cholesterol and low density lipoprotein were decreased to $37\%$ and $24\%$ compared to Triton injection only. For histochemical changes, hepatic tissues obtained at 40 hours after injection of the Triton and the p. yezoensis extract were fixed in fromol-calcium solution. Numbers of lipid drops and cholesterol particles decreased in the portal space of the hepatic cytoplasm. This indicates that the accumulation of lipid, including cholesterol, caused by Triton was prevented by the antihypercholesterolemic effect of extract from the seaweed p. yezoensis.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.9
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• pp.1215-1223
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• 2006

The purpose of this study was to investigate nutrition knowledge, dietary habits, health related life style and health condition of 247 male and 244 female students at K University in Chuncheon. The results of the survey are summarized as follows: The average nutrition knowledge score and dietary habit score were 10.79 and 19.38 for male, and 10.89 and 19.48 for female, respectively. The percentage of those who smoked, drank and exercised regularly were 32.0%, 93.9%, 47.0% for male, and 6.1%, 91.8%, 24.6% for female, respectively. The health scores of the female (43.02) were significantly lower than those of the male (46.26) (p<0.001). On female students, significant correlation was found between dietary habits score and health score (p<0.01). College students are in early stage of adult life and their dietary habits, health related life style and health condition will be continued to their later life. This study may provide basic information on the eating habits and health related life styles of college students.

• The Journal of Korean society of community based occupational therapy
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• v.4 no.2
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• pp.23-30
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• 2014

Objective : The purpose of this study is to investigate the awareness and interest rate of occupational therapy in Korea, and to establish basic data for further development of occupational therapy through the results. Methods : This survey was conducted between October 1th and December 31st 2013 and 308 questionnaires were collected from university student and public. The questionnaires of 308 respondents were analyzed through Cosstabs, Descriptive statistics, Frequency study and t-test, ANOVA analysis using SPSS ver. 18.0. Results : There was a significant difference in the awareness rate of occupational therapy by age and occupation (p<.01). People who were knowledgeable about occupational therapy had a friend or relative related to occupational therapy(33.5%), or were informed through media(37.1%). Positive responses regarding whether responders wanted to find more about occupational therapy were high(53%), and publicity(63.5%) turned out to be the most effective method for advancement. Conclusion : Although there is a lack of public awareness on occupational therapy, high percentage of responders showed positive responses in receiving occupational therapy when they get an injury in the future, and furthermore, learn more about occupational therapy. Based on this result, it is clear that high percentage of people were showing interest to occupational therapy. It could be conjectured that active publicity through internet or media may be effective.

• Journal of dental hygiene science
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• v.15 no.2
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• pp.91-97
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• 2015

The purpose of this study was to examine any possible differences among adolescents in unmet dental care needs according to their demographic and socioeconomic characteristics and oral health status and influential factors on the basis of the fifth national health and nutrition examination survey data. The findings of the study were as follows: Unmet dental care needs were accounted for 19.84 percent. As for the reason, many replied that they couldn't afford to leave school during school hours, and economic factors. As a result of analyzing what affected their unmet dental care needs, this experience was more common in the older age groups than in the 6~12 years age group, and the experience was less common in the respondents with a larger income. As for the subjective oral health status, the experience was 0.61-fold and 0.72-fold less in the respondents who perceived their health as fair or good than who thought their health was poor respectively. And there was a tendency that getting regular dental checkups led to 0.22-fold less experience. Given the above-mentioned findings, the kind of policy that makes dental care services more accessible to youth in consideration of socioeconomic circumstances should be carried out. As many of the adolescents couldn't leave school during school hours, schools should be equipped with dental clinics to improve accessibility to dental care services.