• International conference on construction engineering and project management
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• 2020.12a
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• pp.443-452
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• 2020

Worker's awkward postures and unreasonable physical load can be corrected by monitoring construction activities, thereby increasing the safety and productivity of construction workers and projects. However, manual identification is time-consuming and contains high human variance. In this regard, an automated activity recognition system based on inertial measurement unit can help in rapidly and precisely collecting motion data. With the acceleration data, the machine learning algorithm will be used to train classifiers for automatically categorizing activities. However, input acceleration data are extracted either from designed experiments or simple construction work in previous studies. Thus, collected data series are discontinuous and activity categories are insufficient for real construction circumstances. This study aims to collect acceleration data during long-term continuous work in a construction project and validate the feasibility of activity recognition algorithm with the continuous motion data. The data collection covers two different workers performing formwork at the same site. An accelerator, as well as portable camera, is attached to the worker during the entire working session for simultaneously recording motion data and working activity. The supervised machine learning-based models are trained to classify activity in hierarchical levels, which reaches a 96.9% testing accuracy of recognizing rest and work and 85.6% testing accuracy of identifying stationary, traveling, and rebar installation actions.

• Journal of Korean Physical Therapy Science
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• v.13 no.3
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• pp.7-14
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• 2006

Despite well-known benefits of physical activity for older adults, most older adults remain significantly underactive. The purpose of this study was to examine the effects of a physical activity on blood cholesterol in older adults with an inclusive, choice-based physical activity promotion program to increase lifetime physical activity levels of seniors. A six-month comparison-group trial was conducted with 14 older adults(experimental group = 8, control group = 6) in community senior center. Changes in self-reported physical activity and blood cholesterol were evaluated using paired t-test. The intervention group increased estimated caloric expenditure by 858 calories/week in physical activities of any intensity (p=.050), total cholesterol(p=0.049), high density lipoprotein cholesterol(p=0.045). Control group changes were also negligible. The program led to meaningful physical activity increase. Individually tailored programs to encourage lifestyle changes in seniors may be effective and applicable to health care and community settings.

• Hwankyungkyoyuk
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• v.22 no.3
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• pp.83-96
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• 2009

This article extracted feasible elements for an environmental education program from the 'Intelligent Life', an integrated subject of the 7th elementary school curriculum, and designed a program for second graders in the elementary school and applied it to them in order to examine how the students' environmental altitudes changed. In the controlled class, the instruction followed the lessons specified in the 7th national curriculum faithfully while for the experimental class 1, only the inquiry activity-based environmental education program was applied. Moreover, in experimental class 2, the inquiry activity-based environmental education program was implemented and wrap-up activity was performed as well with the products. To verify the program, questionnaires on the change of environmental altitudes were distributed and analyzed total three times in the pretest, posttest 1(right after the program), and posttest 2(30 days after the program). T-test was carried out with the SPSS 12 program to verify the effect of the applied program. To make up for the quantitative analysis, qualitative analysis was also conducted. The followings show the results gained after the program was implemented. First, This program showed a significant difference(p<.05) in the students' formation of environmental altitudes. Second, it was verified that the inquiry activity-based environmental education class that reorganized the second grade elementary students' 'Intelligent Life' subject had a more positive effect in the cultivation of environmental altitude than the class that followed the present curriculum as it was. It will be necessary to perform follow-up researches on the relativity between curricula for kindergarteners and lower grade elementary school students.

• JSTS:Journal of Semiconductor Technology and Science
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• v.16 no.4
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• pp.463-469
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• 2016

This paper presents a compression-friendly low power test scheme in EDT environment. The proposed approach exploits scan slices reusing to reduce the switching activity during shifting for test scheme based on linear decompressor. To avoid the impact on encoding efficiency from resulting control data, a counter is utilized to generate control signals. Experimental results obtained for some larger ISCAS'89 and ITC'99 benchmark circuits illustrate that the proposed test application scheme can improve significantly the encoding efficiency of linear decompressor.

• Research in Community and Public Health Nursing
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• v.27 no.4
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• pp.299-308
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• 2016

Purpose: The purpose of this study was to develop a positive psychology-based and character strengths-integrated activity program for elders living alone in rural areas, and then to examine the effectiveness of the program. Methods: A quasi-experimental pre- and post-test design with a nonequivalent control group was used. The participants included 59 elders in total, of whom 30 were assigned to the experimental group and 29 to the control group. positive psychology-based and character strengths-integrated activity program for elders consists of sixty-minute sessions held twice per week during 6 weeks, hence 12 sessions in total. Results: There were significant differences between the experimental and control groups in depression, vitality and life satisfaction (all p<.001). Conclusion: The positive psychology-based and character strengths-integrated activity program for elders living alone in rural areas is effective in that it decreased the degree of depression and increased the vitality and life satisfaction in the participants.

• The Journal of the Korea Contents Association
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• v.19 no.6
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• pp.513-523
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• 2019

The purpose of this study is to develop and apply activity-based STEAM education programs to verify elementary school students' logical thinking skills, attitudes to STEAM, and changes in satisfaction. The activity-based STEAM education program was developed in a total of 3 rounds under the theme of 'Let's get through Ultraviolet rays.' The finally developed program, which was revised and supplemented by process of preliminary commitment to elementary school students, proved its effectiveness through statistical methods in 168 sixth-grade in S elementary school students in Gyeonggi-do. The results of the study are as follows: First, the activity-based STEAM education program was developed around the topic of "Let's get through Ultraviolet rays" based on the "The solar system and Star" unit of the 5th and 6th grades of elementary school science. Second, by applying the developed activity-based STEAM education program to elementary school students, their cognitive development level by science behavioral system was improved after class, and proportion of the logical thinking skills and logic of variable control represented a significant value(p<.05). Third, the attitudes toward STEAM education, consisting of seven sub-factors, presented significant statistical test results across other factors, except for communication and usability factors(p<.05). Fourth, in the satisfaction test, the average value of the lower section was 3.59 to 3.85 points, and overall it was positive.

• Culinary science and hospitality research
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• v.24 no.2
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• pp.96-102
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• 2018

The objective of this study was to assess the quality characteristics of Sulggitteok prepared with different ratios of chestnut powder: 0%, 5%, 10%, 15%, and 20%. The moisture content of the chestnut Sulggi without added chestnut powder was 38.24% than that of any other chestnut powder added groups and gradually decreased from 33.34~26.27% based on the addition of chestnut powder. In terms of color, the lightness (L) decreased significantly but redness (a) and yellowness (b) significantly (p<0.001) increased with increasing contents of chestnut powder. The total polyphenol content and DPPH free radical scavenging activity increased as the amount of chestnut powder increased and decreased. Total phenol contents of phenol contents was higher in the 10% added group (347.50 mg GAE/100 g) and DPPH radical scavenging activity was significantly higher in the 5% added group ($69.35{\pm}2.02%$) and 10% added group ($74.33{\pm}2.29%$). Texture profile analysis showed that the hardness, adhesiveness, chewiness were higher than that of the control. The result of sensory evaluation test and the overall acceptability showed that the taste, color, flavor, chewiness, softness and overall acceptability were the highest in the 10% added group while the color and flavor showed no significant different group. Based on these results, it is suggested that chestnut Sulggi with up 10% added chestnut powder can be developed as products.

• Journal of the Korean Society of Physical Medicine
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• v.13 no.2
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• pp.137-145
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• 2018

PURPOSE: The purpose of this study was to investigate the effect of action observational physical training with rhythmic auditory stimulation on muscle activity and gait ability in patients with stroke. METHODS: Twenty-six chronic stroke patients participated in this study were assigned into three groups, experimental group 1 (10% faster tempo rhythmic auditory stimulation with action observation training) n=8, experimental group 2 (average tempo rhythmic auditory stimulation with action observation training) n=9, and control group (action observation training) n=9. In this experiment, the corresponding exercise were applied into the subjects of three group for 30 minute a day, 3 time a week during 4 weeks. All participants were measured to muscle activity of lower limb, 10 meter walking test, Figure of 8 walk test, Dynamic gait Index. The collected data were analyzed by using SPSS (version 18.0 for window) and verified that each data was a normal distribution based on Shapiro-Wilk test. Between-group and within-group comparison was analyzed by using One-way ANOVA test, Paired t-test respectively. In all statistical analyses, significance level, ${\alpha}$ was set by .05. RESULTS: The above results revealed that the all experimental group 1 and experimental group 2 and control group were all effective to improve the lower limb muscle activities, gait ability. However more positive effects shown action observational physical training with rhythmic auditory stimulation experimental group. CONCLUSION: This study suggest that action observation physical training with rhythmic auditory stimulation is effective intervention for improvement of muscle activity and walking ability in chronic stroke patients.

• Journal of Food Hygiene and Safety
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• v.10 no.1
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• pp.29-32
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• 1995

Inclusion complex of omeprazol with $\beta$-Cyclodextrin and Hydroxypropyl-$\beta$-Cyclodextrin were prepared by coprecipitation and freeze-drying method respectively. Effects of these inclusion complex on RBCs were monitored with a spectrophotometer by the method of Kahan et al. and the mutagenic activity based on the Ames plate incorporation test in the presence and absence of liver microsomal enzyme(S9 fraction) using Salmonella typhimurium TA98 and TA100. The RBCs hemolysis and mutagenic activity of these complex were not detected.

• Journal of the Ergonomics Society of Korea
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• v.30 no.3
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• pp.395-401
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• 2011

Objective: This study examined the effects of working chair that was developed for farmers who work in grapevine's cluster thinning. Background: Agricultural work involves some of the nation's highest occupational risk exposures. Fruit cultivation has been recognized as one of the most hazardous crops in which to work. Grapevine cluster thinning task involve activities related to the main risk factors associated with upper limb work-related musculoskeletal disorders. Method: An experiment was designed to test the working chair. Six healthy male($25.8{\pm}4.9years$) were selected as the subjects for this study. Electromyography(EMG) was used to monitor the muscles activity, and Electro-goniometer was used to measure the ranges of motions of the elbow, trunk and knee. Subjective test was also carried out to examine discomfort body parts and their pain intensity. A grapevine's working space was built for the experiment and working chair was installed on it. In order to examine the muscle activity and range of motion, subjects used to the working chair for 30 minutes for each experimental condition. Another test without working chair was also performed for comparison. %MVC was used to quantify the level of muscle activity. Results: Decreases of muscle activity was found in all leg muscles and significant decrease of muscle activity was found in left Gastrocnemius. The range of motion of the trunk and knee also decreased when working chair used. Discomfort in lower back, thigh and shank region were reduced significantly. However, in upper limbs muscle activity tended to increase in working chair compared with conventional task. Conclusion: Improvement for cushion in seat back and pan required to reduce discomfort in buttocks. Application: Overall findings verified that the working chair might help to prevent upper limb and lower back MSDs based on the current study. These results can be practically used for work improvement for the grapevine growers to prevent MSDs.