• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.39 no.1
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• pp.1-11
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• 2021

This paper presents a procedure to extract lane line models using a set of proposed methods. Firstly, an image warping method based on homography is proposed to transform a target image into an image which is efficient to find lane pixels within a certain region in the image. Secondly, a method to use the combination of the results of edge detection and HSL (Hue, Saturation, and Lightness) transform is proposed to detect lane candidate pixels with reliability. Thirdly, erroneous candidate lane pixels are eliminated using a selection area method. Fourthly, a method to fit lane pixels to quadratic polynomials is proposed. In order to test the validity of the proposed procedure, a set of black-box images captured under varying illumination and noise conditions were used. The experimental results show that the proposed procedure could overcome the problems of color-only and edge-only based methods and extract lane pixels and model the lane line geometry effectively within less than 0.6 seconds per frame under a low-cost computing environment.

• Journal of Korean society of Dental Hygiene
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• v.22 no.1
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• pp.21-28
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• 2022

Objectives: This study investigated the influence of oral exercise programs with whole-body exercises on the mental health of the elderly. Methods: Elderly individuals aged 65 years or older were assigned to an experimental group and a control group. Oral exercises with whole-body exercises were conducted in the experimental group for 40 minutes, twice weekly, during 5 weeks from May to June 2021. To evaluate the effectiveness of the program, the oral health related quality of life (OHIP-14, GOHAI), mental health, happiness, and social support of the elderly were explored both before and after the execution of the program in the experimental group. A paired sample t-test was performed to check the changes in the factors investigated, both before and after the execution of the program in the two groups. Results: The values of difference between the experimental and control group were compared in relation to the dependent variables, before and after the execution of the oral exercise program with the whole-body exercises. It was found that statistically significant differences in the OHIP-14 (p=0.163), GOHAI (p=0.156), and feelings of happiness in the elderly (p=0.280) were not evident in the experimental group. However, statistically significant differences emerged with regard to the mental health and provision of social support of the elderly (p<0.05). Conclusions: It was found that the oral exercise program with whole-body exercises executed in this study were effective in improving the mental health and social support of the elderly. However, no significant differences were shown in oral health relating to quality of life and feelings of happiness. It is considered that these findings need to be verified by means of future long-term studies.

• Journal of Korea Game Society
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• v.21 no.3
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• pp.133-146
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• 2021

The aim of this study was to investigate the psychological characteristics of Korean esports athletes. We investigated the psychological characteristics of 40 professional esports players and 72 amateur esports players, a total of 112 esports players. Specifically, we investigated the differences in emotional well-being, interpersonal relationships, and sleep between professional players and trainee players. Professional esports athletes showed higher responsiveness to social conflict and more interpersonal non-acceptance compared to the trainees. Results also indicated high levels of insomnia severity. Based on the results, the need for psychological intervention and sleep intervention for athletes were discussed.

• Journal of Digital Convergence
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• v.20 no.2
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• pp.375-381
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• 2022

The purpose of this study is to find out the spatial expression characteristics of Philipstock from a heterotopic perspective in the background of the times of modern people struggling to live in the era of an infectious disease called COVID-19 along with the era of the 4th industrial revolution. As for the research method, a total of 11 places were selected, focusing on the completed works of interior space from 2015 to the present, when they are more active after retirement, to find out the characteristics of spatial expression through literature and case studies. As a result, the spatial expression characteristics of narrative that only space has were the most frequent, and it was found that the characteristics of imaginary space and fantasy, which are the form of overlapping time to express a place, were interrelated. Philip Stock's design method, which uses narrative, fantasy, and imaginary spatial characteristics, can be seen as sufficiently representing heterotopic characteristics and can be used as another design methodology when designing a new space.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.6
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• pp.256-262
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• 2022

The purpose of this study is to define the shear reinforcing effect of Near-Surface-Mounted (NSM) FRP strips in reinforced concrete (RC) member through a test. Three T shaped RC beams were made and two of them were strengthened with NSM FRP strips for increase shear strength. And those were tested to find the shear strengthening effect. In the test, two case of shear strengthening methods were considered such as 1) with NSM FRP strips having full embedded length and 2) with NSM FRP strips having some what short embedded length and additional externally bonded FRP sheet. As a result, the shear strengthening effect could be obtained when the NSM FRP strips are embedded to have full length up to the bottom of slab. However the shear strength was not increased in the case of having somewhat short embedded length of NSM FRP strips even additional EB sheet was enhanced.

• The Journal of Korean Obstetrics and Gynecology
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• v.35 no.1
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• pp.1-11
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• 2022

Objectives: Management of the postpartum period is important for the health of mothers, and postpartum edema is one of the management targets. In this study, the relationship between the value measured by the device and the postpartum edema sensation was examined to explain the subjective sensation of the mother as an objective value. Methods: Data from 54 cases provided by 24 mothers within 6 weeks postpartum were used in the study. The degree of postpartum edema sensation was measured using a visual analog scale (VAS), and the effect of VAS changes on the body edema index and weight change before and after childbirth was estimated through linear regression analysis. Results: As a result of the regression analysis, when the edema sensation of the mothers VAS increased by 1 point, the Inbody edema index increased by 0.002 points (p=0.000, R²=0.272), and when the VAS increased by 1 point, the weight gain increased by 0.99 kg compared to before pregnancy (p=0.000, R²=0.243), and when VAS increased by 1 point, weight loss decreased by 0.56 kg compared to just before childbirth (p=0.004, R²=0.136). Conclusions: The results of this study, in which the edema sensation of postpartum mothers was statistically significantly related to the edema index and weight change before and after childbirth, showed that the edema sensation complained by the mother could be used as an evaluation index for postpartum edema management in the future.

• Journal of Information Technology Applications and Management
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• v.30 no.2
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• pp.1-18
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• 2023

Recently, as technology development has accelerated and product life cycles have been shortened, it is necessary to derive key product features from customers in the R&D planning and evaluation stage. More companies want differentiated competitiveness by providing consumer-tailored products based on big data and artificial intelligence technology. To achieve this, the need to correctly grasp the required quality, which is a requirement of consumers, is increasing. However, the existing methods are centered on suppliers or domain experts, so there is a gap from the actual perspective of consumers. In other words, product attributes were defined by suppliers or field experts, but this may not consider consumers' actual perspective. Accordingly, the demand for deriving the product's main attributes through reviews containing consumers' perspectives has recently increased. Therefore, we propose a review data analysis-based required quality methodology containing customer requirements. Specifically, a pre-training language model with a good understanding of Korean reviews was established, consumer intent was correctly identified, and key contents were extracted from the review through a combination of KeyBERT and topic modeling to derive the required quality for each product. RevBERT, a Korean review domain-specific pre-training language model, was established through further pre-training. By comparing the existing pre-training language model KcBERT, we confirmed that RevBERT had a deeper understanding of customer reviews. In addition, all processes other than that of selecting the required quality were linked to the automation process, resulting in the automation of deriving the required quality based on data.

• Journal of the Korean Society for information Management
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• v.40 no.3
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• pp.77-98
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• 2023

Large Language Models (LLMs) are becoming the major trend in the natural language processing field. These models were built based on research data, but information such as types, limitations, and risks of using research data are unknown. This research would present how to analyze and evaluate the LLMs that were built with research data: LLaMA or LLaMA base models such as Alpaca of Stanford, Vicuna of the large model systems organization, and ChatGPT from OpenAI from the perspective of research data. This quality evaluation focuses on the validity, functionality, and reliability of Data Quality Management (DQM). Furthermore, we adopted the Holistic Evaluation of Language Models (HELM) to understand its evaluation criteria and then discussed its limitations. This study presents quality evaluation criteria for LLMs using research data and future development directions.

• Journal of Industrial Convergence
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• v.20 no.12
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• pp.187-193
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• 2022

This study was conducted to examine the effect of body image of university students participating in physical activity on appearance management behavior. Using stratified cluster random sampling, a total of 298 male students, 109 male and 189 female students were sampled. The results are as follow. First, male students showed high in appearance, physical strength, health factors and appearance improvement type, and female students showed high appearance management and interpersonal relationship type. It was found that the arts and physical education department had an effect on the body image and appearance management behavior of university students with a lot of pocket money in terms of appearance and physical strength. Second, Body image was found to affect appearance management behavior. Appeared to be the body image of university students through physical activity affects the appearance management behavior, and these behaviors will have a positive relationship to lead a happy daily life in the future.

• Journal of Korean society of Dental Hygiene
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• v.23 no.1
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• pp.43-53
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• 2023

Objectives: We developed an integrated cognitive function improvement program comprising cognitive, emotional, and physical domains, and remotely applied it to middle-aged adults to investigate its effects on oral health, cognitive function, and mental health improvement. Methods: The experimental group underwent the program remotely, using the Zoom platform. A total of 24 participants were recruited and divided into 12 experimental and 12 control groups. The program comprised cognitive, emotional, and physical activities. The sessions lasted 90 min and were performed twice a week for 6 weeks from April to May 2022. Results: Cognitive function, arousal, physical, and mental stress were significantly improved in the experimental group after the intervention than at the baseline (p<0.05). Regarding oral health, tongue plaque decreased 1.34-fold (p<0.01) and saliva increased 1.04-fold (p<0.05) in the experimental group after the intervention than at the baseline. Moreover, the experimental group showed significant improvements in tongue plaque and saliva than the control group (p<0.05 for tongue plaque and p<0.01 for saliva). Regarding mental health, social support significantly increased 11.67-fold (p<0.05) in the experimental group than at the baseline. The experimental group also showed significantly improved social support than the control group (p<0.01). Conclusions: The non-face-to-face integrated cognitive function improvement program for middle-aged adults improved their cognitive function and oral and mental health. Based on these findings, this program may be a useful health program tool for middle-aged individuals.