• International Journal of Highway Engineering
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• v.18 no.1
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• pp.109-117
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• 2016

PURPOSES : The goal of this study is to analyze the operational effects of special roundabouts at large-scale rotaries in Korea. In pursuing the above, this study gives particular attention to comparing standard roundabouts with special roundabouts. METHODS : This study reviews the various types of roundabouts, creates 270 scenarios, builds networks, and comparatively analyzes the operational effects by using VISSIM simulation model and SSAM(Surrogate Safety Assessment Model). RESULTS : First, the operational effects of standard and signalized roundabouts were analyzed, and it was determined that standard roundabouts are the best in the case of under-saturated traffic volume, and signalized roundabouts are the best in the case of over-saturated traffic volume. Second, the operational benefits of a Turbo roundabout were evaluated to be generally lower than the benefits of a standard roundabout, and the benefits of a Turbo roundabout increase when right-turn traffic volume increases. Finally, the safety conflicts of a Turbo roundabout were determined to be the least and decrease when right-turn traffic volume increases. CONCLUSIONS : This study suggests that Turbo roundabouts rank highest for safety, and signalized roundabouts are best for over-saturated traffic volume. This study can be expected to provide some implications for policy decision-making.

• Journal of Digital Convergence
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• v.18 no.2
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• pp.475-482
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• 2020

The purpose of this study is to analyze the paths of the presence that influences the use of the virtual simulation in the special education classrooms. The participants consisted of 76 students who majored in special education in J and K universities. Participants took a three lectures of 3-h. that addressed the theory and practice of virtual technology such as virtual reality(VR) and augmented reality(AR), and then completed the questionnaires on participants' presence level and expectation level of virtual simulation for special education. Study results were as followings: (1) Enjoyment and Communication have direct effects on positive expectation, while Immersion has a direct effect on negative concern; (2) Reality, Accessibility Performance, Communication, and Immersion have indirect effects mediated by Enjoyment on positive expectation; and (3) Communication and Reality have indirect effects mediated by Immersion on negative concern. Lastly, the implications and suggestions for future research were presented.

• Animal Bioscience
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• v.37 no.4
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• pp.576-590
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• 2024

Objective: The objective of this study was to identify genes associated with 305-day milk yield (MY) and fat yield (FY) that also influence the adaptability of the Thai multibreed dairy cattle population to tropical conditions. Methods: A total of 75,776 imputed and actual single nucleotide polymorphisms (SNPs) from 2,661 animals were used to identify genomic regions associated with MY and FY using the single-step genomic best linear unbiased predictions. Fixed effects included herd-year-season, breed regression, heterosis regression and calving age regression effects. Random effects were animal additive genetic and residual. Individual SNPs with a p-value smaller than 0.05 were selected for gene mapping, function analysis, and quantitative trait loci (QTL) annotation analysis. Results: A substantial number of QTLs associated with MY (9,334) and FY (8,977) were identified by integrating SNP genotypes and QTL annotations. Notably, we discovered 17 annotated QTLs within the health and exterior QTL classes, corresponding to nine unique genes. Among these genes, Rho GTPase activating protein 15 (ARHGAP15) and catenin alpha 2 (CTNNA2) have previously been linked to physiological traits associated with tropical adaptation in various cattle breeds. Interestingly, these two genes also showed signs of positive selection, indicating their potential role in conferring tolerance to trypanosomiasis, a prevalent tropical disease. Conclusion: Our findings provide valuable insights into the genetic basis of MY and FY in the Thai multibreed dairy cattle population, shedding light on the underlying mechanisms of tropical adaptation. The identified genes represent promising targets for future breeding strategies aimed at improving milk and fat production while ensuring resilience to tropical challenges. This study significantly contributes to our understanding of the genetic factors influencing milk production and adaptability in dairy cattle, facilitating the development of sustainable genetic selection strategies and breeding programs in tropical environments.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.6
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• pp.1014-1019
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• 2003

A dynamic modeling method for beams undergoing overall rigid body motion is presented in this paper. Two special deformation variables are introduced to represent the stretching and the curvature and are approximated by the assumed mode method. Geometric constraint equations that relate the two special deformation variables and the cartesian deformation variables are incorporated into the modeling method. By using the special deformation variables, all natural as well as geometric boundary conditions can be satisfied. It is shown that the geometric nonlinear effects of stretching and curvature play important roles to accurately predict the dynamic response when overall rigid body motion is involved.

• Asian-Australasian Journal of Animal Sciences
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• v.31 no.4
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• pp.569-575
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• 2018

Objective: This experiment was conducted to investigate the effects of chromium picolinate (CrP) on fat deposition, genetic expression and enzymatic activity of lipid metabolism-related enzymes. Methods: Two hundred forty one-day-old Ross broilers were randomly divided into 5 groups with 4 replicates per group and 12 Ross broiler chicks per replicate. The normal control group was fed a basal diet, and the other groups fed the same basal diet supplemented with 0.1, 0.2, 0.4, and 0.8 mg/kg CrP respectively. The experiment lasted for 21 days. Results: Added CrP in the basal diet decreased the abdominal fat, had no effects on subcutaneous fat thickness and inter-muscular fat width; 0.2 mg/kg CrP significantly decreased the fatty acid synthase (FAS) enzymatic (p<0.05); acetyl-CoA carboxylase (ACC) enzymatic activity decreased in all CrP groups (p<0.05); hormone-sensitive lipase (HSL) enzymatic activity also decreased, but the change was not significant (p>0.05); 0.4 mg/kg CrP group significantly decreased the lipoprotein lipase (LPL) enzymatic activity. FAS mRNA expression increased in all experimental groups, and the LPL mRNA expression significantly increased in all experimental groups (p<0.05), but not 0.2 mg/kg CrP group. Conclusion: The results indicated that adding CrP in basal diet decreased the abdominal fat percentage, had no effects on subcutaneous fat thickness and inter-muscular fat width, decreased the enzymatic activity of FAS, ACC, LPL and HSL and increased the genetic expression levels of FAS and LPL.

• Journal of the Korea Convergence Society
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• v.10 no.3
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• pp.291-296
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• 2019

In the movie market, make-up shows various ways of make up in professional technology as the industry develops. Therefore, it is necessary to analyze the trend of making a movie with a change in the type of movie Regarding the characteristics of makeup in the early days of silent films, the stage makeup was fully used. also in the days of sound films, the realistic and concrete makeup was expressed such as straight makeup, character makeup, Special effects makeup, and digital makeup. With the development of the fourth industry, CGI special effects have become possible not only in the background of movies but also in makeup. In the movie, makeup does not use CGI makeup alone, but it is used in a combination of straight makeup, character makeup, and special effects makeup. That's why a variety of makeup needs to be taught. In the future, the domestic film industry should establish the improvement measures for educating the techniques of prosthetic/digital makeup by securing the sufficient finances to more vitalize the film industry of Korea in domestic/foreign markets.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.511-512
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• 2006

Tungsten coatings with different interlayers onto the oxygen-free copper substrates were fabricated by atmosphere plasma spraying. The effects of different interlayers of NiCrAl, NiAl and W/Cu on bonding strength were studied. SEM, EDS and XRD were used to investigate the photographs and compositions of these coatings. The tungsten coatings with different initial particle sizes resulted in different microstructures. Oxidation was not detected in the tungsten coating, but in the interlayer, it was found by both XRD and EDS. The tungsten coating deposited directly onto the copper substrate presented higher bonding strength than those with different interlayers.

• KDI Journal of Economic Policy
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• v.25 no.1
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• pp.3-54
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• 2003

This paper studies the effects of the special surcharge on deposits, proposed as a plan to finance the costs of restructuring Korean corporate and financial sectors. Specifically, the study analyzes the change in the autonomous behavior of economic agents in terms of cost transfer and substitution effects. Given the result that the growth rate of deposits does not respond to the change of interest rates so much as that of loans, financial institutions have more incentive to transfer the costs incurred by the special surcharge to depositors. This paper also reports that the portfolio of households show a noteworthy feature that insured deposits have a relatively small portion in terms of total assets for high-asset class households, whereas most assets for low-asset class households are subject to the special surcharge.

• Journal of Home Health Care Nursing
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• v.24 no.2
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• pp.200-209
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• 2017

Purpose: This study aimed to evaluate the effects of sociodrama on mothers of adolescents receiving special education at school. Methods: The participants were 30 mothers of adolescents with autism and intellectual, physical, emotional, and behavioral disability (experimental group=8, control group=16, 4 excluded). Sociodrama was conducted over 6 weeks (6 sessions). Data were collected using a mixed method. A constructed questionnaire on parenting stress, depression, and parenting self-efficacy was distributed before and after the intervention. A focus group interview was conducted subsequently. Data were collected from May to June 2016 and analyzed using Wilcoxon-Mann-Whitney test and a content analysis. Results: The intervention group showed significant changes in parenting stress (Z=-2.34, p=.019), depression (Z=-.3.46 p=.001), and parenting self-efficacy (Z=-2.82, p=.029) compared with the control group. Results of the qualitative analysis exhibited two themes, namely "changes" and "healing and challenges," which were divided into 4 categories and 9 sub-categories. Conclusion: Sociodrama was effective in reducing the level of parenting stress and depression, and increased the level of parenting self-efficacy in participants. Sociodrama can be recommended as an intervention program for parents raising adolescents receiving special education.

• Smart Media Journal
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• v.8 no.1
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• pp.51-58
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• 2019

This paper describes a gesture application to controlling the special effects of physical devices for 4D contents using the PWM (Pulse Width Modulation) method. The user operation recognized by the infrared sensor is interpreted as a command for 3D content control, several of which manipulate the device that generates the special effect to display the physical stimulus to the user. With the content controlled under the NUI (Natural User Interface) technique, the user can be directly put into an immersion experience, which leads to provision of the higher degree of interest and attention. In order to measure the efficiency of the proposed method, we implemented a PWM-based real-time linear control system that manages the parameters of the motion recognition and animation controller using the infrared sensor and transmits the event.