• Journal of the HCI Society of Korea
• /
• v.14 no.2
• /
• pp.31-39
• /
• 2019

This research examined the changes that fast-growing voice-based devices would bring in the media multitasking environment. Based on the theoretical background that information processing efficiency improves when performing multiple tasks requiring different resource structures at the same time, we conducted an experiment where participants searched for information with voice-based or screen-based devices while performing an additional visual task. Results showed that both task performance environment and interface modality had significant main effects on cognitive load. The overall cognitive load level was higher in the voice interface group, but the difference in cognitive load between the two groups decreased in a multitasking environment where the additional visual resources was required. The visual task performance was significantly higher when using the voice interface than the screen interface. Our findings suggest that voice interfaces offered advantages in the cognitive load and task performance by distributing two tasks to the auditory and visual channels. The results of this study imply that voice-based devices have the potential to facilitate efficient information processing in the screen-centric environment where visual resources collide. We provided theoretical evidence of resource distribution using multiple resource theory and tried to identify the advantages of the voice interface more specifically based on the threaded cognition model.

• Phonetics and Speech Sciences
• /
• v.11 no.3
• /
• pp.57-67
• /
• 2019

This study aimed to investigate regional differences in the development of speech production in Korean children. A total of 619 children aged 2 to 7 years from the Jeolla, Seoul/Gyeonggi, Chungcheong, and Gyeongsang areas were included in this study. The subjects were assessed with the UTAP2 word-level test. In PWC, PMLU, and PWP, the performance was significantly lower in Gyeongsang at 2 years 11 months and in Jeolla and Chungcheong at 3 years 5 months than in Seoul/Gyeonggi. The total PCC of Gyeongsang and Chungcheong and UTAP PCC of Chungcheong were significantly lower at 2 years 11 months compared with those of Seoul/Gyeonggi, while Jeolla and Chungcheong showed significantly lower total PCC and UTAP PCC than Seoul/Gyeonggi at 3 years 5 months. However, no regional difference was observed in any indicators after the age of 3 years 6 months. These results suggest that there are regional differences in the ability to produce speech sounds at a very young age, and that the differences can be explained by the differences between Seoul/Gyeonggi and the other provinces rather than by the individual characteristics of specific regions.

• Journal of Hospice and Palliative Care
• /
• v.22 no.1
• /
• pp.30-38
• /
• 2019

Purpose: This study analyzed a path through which factors influencing death anxiety in the community-dwelling elderly, assuming personal organismic factors and microsystemic factors based on the ecology model purported by Belsky (1980). Methods: This study was performed with 189 elderly people. Data were collected through a self-report questionnaire. The data were analyzed using the SPSS and AMOS programs. Results: The factors influencing death anxiety in the elderly were depression, family support, social network, and familism value, and the explanatory power of these variables was 22%. Death anxiety increased with higher depression, higher familism value, larger social network, and lower family support. Spiritual well-being and elderly discrimination experience had indirect effects on death anxiety, and these effects were mediated by depression. Conclusion: Depression, family support, social network, and familism value were found to influence death anxiety in the elderly, and the strongest effect came from depression. To reduce death anxiety in the elderly, it is important to improve their relationship with their family and friends. Moreover, support should be provided by establishing local systems, and intervention should be provided to alleviate depression.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.23 no.1
• /
• pp.19-26
• /
• 2019

The masonry infill walls are one of the most popular components that are used for dividing and arranging spaces in building construction. In spite of the fact that the masonry infills have many advantages, the system needs to be used with caution when the earthquake load is to be considered. The infills tend to develop diagonal compression struts during earthquake and increase the demand in surrounding RC frames. If there are openings in the infill walls, the loading path gets even complicated and the engineering judgements are required for designing the system. In this study, a masonry infill system was investigated through finite element analysis (FEA) and the results were compared with the current design standard, ASCE 41. It is noted that the equivalent width of the compression strut estimated by ASCE 41 could be 32% less than that using detailed FEA. The global load resisting capacity was also estimated by 28% less when ASCE 41 was used compare to the FEA case. Rather than using expensive FEA, the adapting ASCE 41 for the analysis and design of the masonry infills with openings would provide a good estimation by about 25% conservatively.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.7
• /
• pp.467-473
• /
• 2019

The purpose of this study is to present the scale of the overall influence by way of investigating how much any sub - elements of middle school teachers' distributed leadership influences any sub - elements of teacher efficacy and teaching commitment. First, there was no statistically significant difference in perceived level on distributed leadership according to the background variables of middle school teachers, but on average, it was shown to be high in female teachers, common teachers, over 21-year-career teachers and private school teachers. Second, there was a statistically positive correlation between distributed leadership and teacher efficacy or teaching commitment. Teacher efficacy showed a higher positive correlation than teaching commitment. Third, the study statistically showed that distributed leadership overall has influence on teacher efficacy and teaching commitment(41%). In conclusion, the study revealed a meaningful positive correlation between sub - elements of distributed leadership and sub - elements of teacher efficacy or teaching commitment, specially self-regulating efficacy, confidence of sub-elements of teacher efficacy, and school love of sub - elements of teaching commitment were positively explained according to the sub - elements of middle school teachers' distributed leadership. The explanatory power of the sub-elements of the distributed leadership on the teacher efficacy and the teaching commitment was 27% in the school situation, 28% in the leadership of the school principal, 28% in the leadership of the teacher, and 28% in the teacher interaction.

• Journal of the Korea Convergence Society
• /
• v.10 no.5
• /
• pp.333-340
• /
• 2019

The purpose of this study was to analyze the effectiveness of oral health education using Qraycam. The study materials used oral hygiene examination, oral health attitude and oral health behavior scores, and compared their pre and post results. This study was a pre-post test design for a single group. The research period was from September to mid-December, 2018. The subjects of the study were 33 participants who visit for the class and 33 students for the survey of education preference. The data analysis used IBM SPSS 24.0 Ver, a significant level was 0.05. As a result, O' Leary index and halitosis as oral hygiene examination were significantly reduced according to intervention pre and post using Qraycam (p<.001). The oral health attitude and oral health behavior score were statistically significantly high according to intervention pre and post using Qraycam (p<.001). The satisfaction level was significantly high when using Qraycam among students' preference for education methods in the categories "useful in oral health education" and "a good ability to recognize and determine plaque" (p<.001). In conclusion, oral health education using Qraycam in dental clinics will be a way to improve oral health education effects for dental hygienists.

• Korean Journal of Food Science and Technology
• /
• v.51 no.2
• /
• pp.141-146
• /
• 2019

Sparassis crispa is an edible mushroom that is distributed in Korea, Japan, Europe, and North America. It exerts various biological activities such as immunopotentiation, anti-diabetic, anti-cancer, and anti-inflammatory effects. Recently, we separated the health functional non-aqueous fraction from the chloroform extract of S. crispa (SCF4). In this study, we evaluated the antiangiogenic activity of SCF4 in human umbilical vein endothelial cells (HUVECs). SCF4 effectively inhibited vascular endothelial growth factor (VEGF)-induced cell growth at concentrations ($5-25{\mu}g/mL$) showing no cytotoxic effects. SCF4 inhibited VEGF-induced invasiveness and tube formation ability, which are in vitro angiogenic features of HUVECs, in a dose-dependent manner. In addition, SCF4 markedly suppressed in vivo angiogenesis of chorioallantoic membrane from growing chick embryos without cytotoxicity. Furthermore, SCF4 downregulated the phosphorylation of VEGFR2, AKT, and ERK1/2, which are major angiogenic signal mediators. These results suggest that SCF4 inhibited angiogenesis by suppressing the VEGFR2 signaling pathways without cytotoxicity.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.12
• /
• pp.178-185
• /
• 2018

A self-report evaluation is used to prevent driving accidents by elderly drivers. The majority of normal older adults may have mild cognitive impairment with reduced cognitive function. These depressed cognitive functions may be variables that affect the performance of elderly drivers. This study confirmed the cognitive functions that affect the self-reported evaluation for elderly drivers with mild cognitive impairment. Based on the results of the Korean Version of the Montreal Cognitive Assessment, 103 elderly drivers were classified into mild cognitive impairment and normal groups of elderly drivers. The Korean-Drivers 65 plus scores used in the self-reported evaluation of the two groups were compared, and the cognitive functions affecting the evaluation were analyzed. Results found the mild cognitive impairment group showed a significantly lower evaluation performance compared to the normal group, and the self-reported evaluation results of the elderly driver with mild cognitive impairment showed a significant correlation between visuoconstructional skills and delayed recall. As a result of regression analysis, the visuoconstructional skill was identified as the cognitive function with the strongest influence on the self-reported evaluation performance. Delayed recall was also found to have a partial effect but not at the level of altering the self-reported evaluation results of the elderly driver with mild cognitive impairment.

• The Journal of the Korea Contents Association
• /
• v.21 no.4
• /
• pp.370-381
• /
• 2021

This study examines the perceptions and demands of pre-service early childhood teachers about the Demonstration of simulated instruction for 350 students in early childhood education at 3-4 years university located in Busan, Ulsan, and Gimhae. And through this, the purposes of study are to provide basic data based on the current level of pre-school teachers for instructors leading simulated instruction and to seek effective management plans for simulated instruction to improve teaching ability. As a result of the study, pre-service early childhood teachers recognized that simulated instructions were necessary in teacher training course and helped to improve teaching ability, but they did not actively agree to expand simulated instructions and were not very satisfied with the methods of instructors in demonstration of simulated instruction. They wanted to receive feedback from instructors who have practical teaching knowledge and skills based on field experience at least two times during preparation stage and evaluation stage of the simulated instructions. And they wanted to be guided specifically on principles and methods of preparing educational plans, effective interactions and questions with young children. They wanted the feedback, the most preferred form of feedback is form of participations by all class members and instructors. In addition to instructor's feedback, they required experience of simulated instruction in which infants and toddlers participate together.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.1
• /
• pp.585-594
• /
• 2021

This Quasi-experimental study was started under the assumption that the stress of students who participated in Buddhism and Mind Healing Lectures based on an understanding of the scriptures will be relieved through the lectures, thereby enhancing their psychological stability, thinking ability, and enhancing understanding. Stress can be confirmed through a self-report test, but in this study, quantitative EEG was measured to evaluate the stress level and secure objectivity. To this end, the difference between the 1st week as pre and 15th week as post quantitative EEG was verified for the experimental group taking the Buddhism and Mind Healing Lecture held from March to June 2019 at S University in G-gu, Seoul, and the control group who did not. The Mann Whitney U test and Wilcoxon code ranking test were used as analysis methods because the number of subjects was 14. As a result, there was a significant difference in the beta wave (F7, T3, 4, T5) and the high beta wave (F7, F8, T3, T4) in the experimental group. The coherence was also improved, while there was no significant difference in the control group. Buddhism and Mind Healing Lectures improved stress.