• Korean Journal of Community Nutrition
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• v.23 no.3
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• pp.234-242
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• 2018

Objectives: This study was to investigate the perception of mothers of elementary school students regarding environment-friendly agricultural products in school foodservice. Methods: A total of 282 mothers whose children were receiving environment-friendly agricultural products during elementary school foodservice in Gyeonggi participated in this questionnaire survey. The survey was conducted to investigate respondents perception and satisfaction with environment-friendly agricultural products in their children's school meals from May 29 to June 9, 2017. Results: About 79% of the subjects were satisfied with school foodservice. The most important aspects of school foodservice were nutrition (35.8%) and sanitation (34.8%). Over 80% of the subjects were aware of environment-friendly agricultural products and about 54% of the subjects checked for a certification mark when purchasing environment-friendly agricultural products. Additionally, 72.3% of the subjects knew that environment-friendly agricultural products were used at school. The advantages of using environment-friendly agricultural products in school foodservice were safety (75.5%) and high food quality (16.3%). About 66% of the mothers knew the school was receiving support from the city or education office for using environment-friendly agricultural products. Additionally, 74.5% of the mothers responded that they are willing to pay for use of environment-friendly agricultural products when subsidies were not supported. Conclusions: The positive perception and high support for use of environment-friendly agricultural products in school foodservice among elementary students' mothers can be used as basic data for expansion of the use of environment-friendly agricultural products in school foodservice.

• Journal of Korean Elementary Science Education
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• v.25 no.1
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• pp.8-14
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• 2006

This study examined how pre-service elementary teachers' perceptions regarding the learning environment (learning focus/ability-meritocracy/cooperative climate) and achievement goals (mastery/performance-approach/performance-avoidance) in science education courses jointly contributed to their science teaching efficacy beliefs (personal science teaching efficacy belief/science teaching outcome expectancy). A path analysis supported a causal model in which the perception of the learning focus influenced the mastery goal, which in turn influenced the personal science teaching efficacy belief and science teaching outcome expectancy. The perception of learning focus also had a direct effect on science teaching outcome expectancy. The perception of ability-meritocracy influenced personal science teaching efficacy belief via the performance-approach (positively) or, conversely, the performance-avoidance goal (negatively). No link .was deduced from the perception of cooperative climate. The educational implications of these findings were also discussed.

• Journal of Digital Convergence
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• v.17 no.2
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• pp.329-338
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• 2019

The purpose of this study was conducted to determine the influence of perceptions of the campus environment and health perception on stress of nursing students. Data were collected from three nursing colleges from December 01 to December 30, 2016, and data were collected by 223 students using the SPSS/WIN 21.0 program. Result of this study, the general characteristics of differences in stress were age, experience of clinical practice, gender, type of housing, personality and eating habits type, and experience in using the school health center. Stress showed negative correlation between perceptions of the campus environment and health perception. Factors influencing stress were eating habits, gender, perceptions of the campus environment and health perception, and their explanatory power on stress was 23.1%. Therefore, to reduce the stress of nursing college students, various programs should be developed and operated to improve the perceptions of the campus environment and increase the perception of health.

• Journal of The Korean Association For Science Education
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• v.17 no.3
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• pp.251-260
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• 1997

The instructional influences of cooperative learning strategies, which emphasize mutual interdependency of learners, group goal, and individual accountability, upon students' achievement, the attitude toward science instruction and the perception of learning environment were investigated. Before instruction, the prior knowledge test about atoms and molecules, the test of attitudes toward science instruction, and the perception questionnaire of learning environment were administered, and the grade in the previous mathematics course was obtained. These scores were used as covariates. Mid-term examination score was used as blocking variable. For instruction, three different strategies-traditional individual learning, small group learning, and cooperative learning-were used and teaching materials for the units of mole and stoichiometry were also prepared. After instruction, the researcher-made achievement test, the test of attitudes toward science instruction, and the perception questionnaire of learning environment were administered. The perception questionnaire of group activities was also administered to the two treatment groups. In the quantitative subtest, the scores of cooperative learning group and small group learning group were significantly higher than those of traditional individual learning group. However, the cooperative learning group's scores in the achievement test and the qualitative subtest were significantly higher than those of small group learning group and traditional individual learning group. The students in the cooperative learning group were found to have the most positive perception of learning environment but to have similar attitudes toward science instruction. No interaction between the treatment and the level of the previous achievement was found in any of the analyses. In the perception questionnaire of group activities, students in both small group learning group and cooperative learning group exhibited positive perception of group activities. However, students in the cooperative learning group tended to think that their activities were related with their group's success. Educational implications are discussed.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.3
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• pp.175-189
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• 2023

Fault detection and diagnosis (FDI) algorithms are actively being researched for ensuring the integrity and reliability of environment perception sensors in autonomous vehicles. In this paper, a fault detection algorithm based on a multi-sensor perception system composed of radar, camera, and lidar is proposed to guarantee the safety of an autonomous vehicle's perception system. The algorithm utilizes reference generation filters and residual generation filters based on finite impulse response (FIR) filter estimates. By analyzing the residuals generated from the filtered sensor observations and the estimated state errors of individual objects, the algorithm detects faults in the environment perception sensors. The proposed algorithm was evaluated by comparing its performance with a Kalman filter-based algorithm through numerical simulations in a virtual environment. This research could help to ensure the safety and reliability of autonomous vehicles and to enhance the integrity of their environment perception sensors.

• KIEAE Journal
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• v.3 no.2
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• pp.25-32
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• 2003

This study deals with the investigation of recognition structure on architectural environment and reconstruction of it by artificial intelligence. To test the possibility of the reconstruction, recognition structure on architectural environment is analysed and each steps of the structure are matched with computational methods. Edge Detection and Neural Network were selected as matching methods to each steps of recognition process. Visual perception system established by selected methods is trained and tested, and the result of the system is compared with that of experiment of human. Assuming that the artificial system resembles the process of human recognition on architectural environment, does the system give similar response of human? The result shows that it is possible to establish artificial visual perception system giving similar response with that of human when it models after the recognition structure and process of human.

• Journal of Korean Home Economics Education Association
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• v.24 no.3
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• pp.89-100
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• 2012

The purposes of this study were to examine the overall tendency of perception of school environment and school adjustment in early adolescents during their transition from elementary to middle school. Also, examine the differences of adolescents' perception of school environment and school adjustment before and after entering secondary education. For this study, a total of 781 adolescents from middle school were asked to answer the questionnaire. And some objects of study, a total of 119 adolescents had answered in the same questionnaire content at the end of sixth grade of elementary school. The main findings were as followings. First, adolescents' perception of school environment during the transition to middle school was relatively good level, but perception of school safety appeared to be lower than average. Second, adolescents' school adjustment during the transition was comparatively good, particularly school life adjustment and school peer adjustment appeared to be above average. Third, there were significant positive relationships between perception of school environment and school adjustment. Fourth, adolescents' perception of school environment significantly decreased after they entered middle school, and significant differences were found in teacher support. Fifth, there were no differences in school adjustment before and after entering middle school, however school class adjustment and school life adjustment were significantly increased after the entrance into middle school.

• Journal of the Korean Society of Earth Science Education
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• v.11 no.3
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• pp.212-223
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• 2018

The purpose of this study is to investigate the perception of elementary students' 'global environment'. The research method used the Sementic Network Analysis method of the global environment elements which appeared in the students' explanation about the picture and the picture that emerged about the 'global environment'. The results of the study are as follows. First, as a result of analyzing the students' explanation of the pictures along with the pictures of the students, the elementary students were perceived negatively about the global environment such as 'environmental pollution', 'global warming' and 'trash problem'. Second, as a result of analyzing the image of the global environment expressed in the picture, there were many images expressed from a everyday viewpoint rather than a macroscopic viewpoint, and there was a tendency to express the earth personified. In addition, the picture expressing the clean earth environment expressed the most trees with natural environment elements and expressed the healthy earth with various natural elements such as sea, mountain, and land. Third, as a result of analyzing the difference of perception of global environment by grade, it was found that the difference of perception of global environment by grade was not much different.

• Asian Journal of Atmospheric Environment
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• v.8 no.3
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• pp.140-153
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• 2014

The extreme heat watch and warnings (EHWW) which is constructed as a part of the climate change adaptation took effect in the summer of 2008, but active response actions failed to be taken because of low perception among citizens. Therefore, a survey investigation targeting citizens residing in Busan and the Gyeongnam province was conducted in order to know the perception regarding EHWW issued by the Korea Meteorological Administration, to identify the main media through which information is acquired, and to propose an improvement measures which may enhance the usefulness and the degree of satisfaction of weather information. The results are as follows; The perception regarding EHWW was not very high as it remained at 59.8% in terms of percentile. Although the statistical significance was not fulfilled in the categories of gender or occupation, significant differences did exist among age groups. The main medium through which citizens acquired information regarding EHWW was the television, which was followed in order by the internet, acquaintances, short message service (SMS), radio, newspapers, the 131 weather hotline, and other media. The usefulness of EHWW was somewhat high (67.2%), and female students were found to utilize the information to a higher degree than male students. The statistics on the level of satisfaction regarding the weather information (65.4%) revealed that most respondents were satisfied. Housewives, professional, and the elder age groups exhibited great satisfaction, leading to the conclusions that the level of perception and interest regarding to the special weather reports (SWR) have an impact on satisfaction of SWR.

• The Journal of the Acoustical Society of Korea
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• v.18 no.4E
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• pp.10-19
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• 1999

Psychophysical approaches to the room acoustics have been made in number of researches. The present study is looking at whether the listener's perception of frequency change in rooms are dependent on the acoustics of a listening environment. P(C)s for frequency change in short tones were measured in different listening conditions. Two experiments were carried out to investigate the influence of room acoustics on the listener's perception of frequency change, and its implication for evaluating the acoustics of listening environments were examined and discussed. It was found that the temporal and spectral contents of reflections from room surfaces might be an important factor which influenced the listener's perception of frequency change in a reverberant sound field. This implicates that psychophysical approach by measuring listener's frequency change perception might be an useful tool for evaluating room acoustics. However, cares should be taken, since some individual differences were found to exist with respect to the direction of frequency change.