• Journal of People, Plants, and Environment
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• v.22 no.5
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• pp.515-524
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• 2019

This study was conducted based on the fact that children in institutions for early childhood education located in cities lack the opportunity to experience nature. Therefore, urban parks are where it is possible to observe nature and natural environment, through which we examined the effects of nature activities on kindergarten children's curiosity and scientific problem-solving ability. The subjects of this study were 5-years old kindergarten children in attending public kindergartens in Cheonan and Asan and 42 children were randomly selected. The pretest and posttest were conducted on curiosity and scientific problem-solving ability before and after nature activities. The results showed that nature activities in urban parks had significant effects on improvement of kindergarten children's curiosity and scientific problem-solving ability (p <.05). Therefore, nature activities in urban parks had positive effects on preference for unknown and exploratory behavior, which are sub-factors of kindergarten children's curiosity. Nature activities also had positive effects on discovery and statement of the problem, creation and application of ideas, and conclusion to problem solving.

• Journal of Korean Elementary Science Education
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• v.35 no.2
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• pp.216-228
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• 2016

The purpose of this study was to analyze pre-school teachers' observation experience and their pre and post degrees of preferences in observing underground and water living things, fungus, insects, flowerless plants and sea lives. Based on the analysis, their pre-observation experience in living things were insects, ocean creatures, underground living things, flowerless plants, fungus and water living things in order. The degree of preferences in flowerless plans based on their gender, the female pre-service teachers showed higher scores than the average in both pre and post test. The male, however, responded higher scores in underground living things in both tests. Their background such as liberal arts or science or arts and physical major affected their preferences scores in water living things, insects and flowerless plans in the post test, and the science major pre-service teachers showed the highest degree of preferences in insects among the liberal arts, science or arts and physical major pre-teachers in the post test. In conclusion, there were different degree of their preferences affected by the pre observation experience, gender difference, their present majors such as the liberal arts, science or arts and physical major, the categories of living things but not in their high school background such as liberal arts or science.

• Hwankyungkyoyuk
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• v.20 no.4
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• pp.106-116
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• 2007

The objectives of this study were to investigate youth's nature experiences and environmental perception and to analyze the effects of nature experiences on environmental perception. The study was conducted by review of literature and survey. The data were collected from 146 youths in youth activities by random sampling. Major findings of the study were as follows: Firstly, youths who live in small city and have experiences in rural area showed higher average of rearing animal and plants experience than others and youths who are in high school and get upper academic achievement have higher travelling experience than others. Secondly, female youths were higher average of environmental conservation intention than males. Thirdly, learning experience about nature and sex variables influence on environmental conservation intension and age and residence influence on environmental practice. In conclusion, the study suggests youths should have opportunity on nature experience programs for developing environmental perception.

• Korean Journal of Environment and Ecology
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• v.31 no.6
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• pp.578-585
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• 2017

This study was intended to analyze the visitors' awareness of the cultural asset value of Marsh Plants of Daesong-ri, Haman (Natural Monument 346) as well as the requirement for use and management of the only marsh designated as a National Monument in order to provide the implication for future management. The result of the analysis showed that the public awareness and the awareness level of the natural monuments were low and that the motivations for visiting were the experience and education of nature, rest and leisure, and experience of the cultural heritage, in that order. The analysis of motivation for visiting according to the awareness level showed that the group with a high awareness level of the Marsh Plants or the group that thought highly of its cultural asset value tended to visit it more for the experience of nature or the experience of the cultural heritage than for simple resting. For usage, the visitors required the basic amenities such as guide board and the more active promotion. They also preferred the discovery of traditional resources using the marsh plants and the experience of nature. Both local residents and outside visitors pointed out the lack of systematic management policy and lack of communication with local residents as the main problems. They recognized that the policy that balanced the preservation and usage through the cooperation of various stakeholder including local residents must be established and applied in the field to ensure proper management.

• Journal of People, Plants, and Environment
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• v.24 no.3
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• pp.277-283
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• 2021

Background and objective: This study was conducted to increase understanding of agriculture through agricultural experience programs for adolescents living in self-reliance residence hall, and to investigate changes in work performance ability through changes in hand function. Methods: There were 11 subjects, and the average age was 18.2 years, all males without disabilities. The agricultural experience program consists of a total of 10 sessions including orientation and watching videos on future agriculture, creating vegetable gardens, planting, managing each crop, harvesting, visiting the processing room, and selling at a local food store. Results: The change in agricultural literacy by the agricultural experience program positively improved from a score of 113.73 to 127.91 (p = .008). The changes by sub-item are as follows. The value and safety of agri-foods (p = .020) and agriculture and natural environment (p = .007) were significantly improved. The function and value of rural areas (p = .050), production of agricultural products (p = .160), processing and distribution of agricultural products (p = .248), and agricultural policies (p = .058) were not significantly changed. The simple function of the hands was measured by the number of pegs inserted during 30 seconds, and the assembly function was measured by the number of pegs inserted during 60 seconds. In the case of simple function, the dominant hand was improved from 14.82 to 15.83 (p = .014), andthe non-dominant hand was also significantly improved from 13.79 to 15.01 (p = .002). There was no significant improvement in the simple function (p = .153) and assembly function (p = .770) of both hands. Conclusion: It is considered that the agricultural experience program will enable youths living in self-reliance residence halls to enhance their understanding of agriculture as an occupation, and enable them to play a role as wise consumers by positively affecting improvements in their agricultural literacy and simple hand functions.

• Journal of Radiation Protection and Research
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• v.34 no.4
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• pp.165-169
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• 2009

Two dosimeters are provided to radiation workers participating in tasks where high radiation exposure is expected during maintenance at nuclear power plants. At Korean nuclear power plants, two dosimeters are currently provided for tasks where exposure rates exceed 1 mSv/hr, the difference of equivalent dose to specific parts of the body is more than 30% and an exposure of more than 2 mSv is expected in a single task. These conditions for the provisioning of two dosimeters are based on previous field test results, and it is recommended that the dosimeters be worn on the chest and back. It was also found that the workers felt it was more convenient when they wore two dosimeters on chest and back rather than on chest and head. After the application of previous field test results to practice, it was found that the calculated effective dose for workers during radiation work was lower than the maximum dose of chest or back dosimeter by approximately 10%-30%. This performance is regarded not only to meet the international guideline but also to provide convenience for workers during radiation work.

• The Plant Pathology Journal
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• v.36 no.3
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• pp.297-302
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• 2020

Root-knot nematodes (Meloidogyne spp.) are the most destructive group of plant-parasitic nematodes. Plants infected by Meloidogyne spp. develop above-ground symptoms, stunting, yellowing, nutrient deficiencies, and gall formations with typical hook-shaped root tips. Infected plants experience yield losses. During 2018-2019 survey, leaf chlorosis rice plants were found in 206 fields of 67 counties in Guangxi, China, around 30 days after transplanting. Galls and hooked tips on the roots and pear-shaped females were observed. About 32.04% of fields were infested with the nematode. The nematodes were identified as Meloidogyne graminicola base on morphological and molecular analysis. To the best of our knowledge, this is the first report of M. graminicola on rice plants in Guangxi, China. The results of this study urge the discovery of resistant cultivars and the development of management strategies.

• Journal of People, Plants, and Environment
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• v.23 no.1
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• pp.23-33
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• 2020

This study starts from the awareness of the problem that consumers are isolated from the standing spray product planning, and thus suggests effective designs and methods to the new standing spray design process. The ultimate purpose of this study is to suggest practicable new standing spray design outputs. Service design is based on customer experience, and thus it is intangible, process-centered and based on various relations. Applying the service design to the development of new standing spray designs has the following significance. (1) Service design is an effective method for maximizing customer-centered experience. The customer-centered method of service design promotes practicability of new standing spray design. (2) Service design solves various problems by mediating opinions among various stakeholders. Effective and practicable solutions could not be found for new standing spray design despite various efforts that had been made for a long time. Since each step of the process is approached separately, it is necessary to take an overview of the whole process like service design. (3) Service design lays stress on process in which stakeholders participate. Participation and collaboration among stakeholders in the new standing spray design process will improve their satisfaction and enthusiasm to implement the new system.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.33 no.10
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• pp.991-1004
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• 2009

Operating experience of the various components in the nuclear power plants has shown that a variety of degradation mechanisms can occur during operation. Therefore, the accurate lifetime evaluation and systematic management are very important for the safe as well as the economical operation of the nuclear power plants. In this paper, the characteristics of a total of 17 degradation mechanisms were reviewed and the plausible degradation mechanisms such as stress corrosion cracking, fatigue, irradiation embrittlement, and so on, were identified. Also, the lifetime evaluation technologies which have been developed for the application to the domestic nuclear power plants are described. In addition, a total of 48 aging management programs which have been established for the safe operation of the various components are explained.

• Nuclear Engineering and Technology
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• v.49 no.2
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• pp.313-326
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• 2017

The systematic management of plant risk is crucial for enhancing the safety of nuclear power plants and for designing new nuclear power plants. Accident sequence precursor (ASP) analysis may be able to provide risk significance of operational experience by using probabilistic risk assessment to evaluate an operational event quantitatively in terms of its impact on core damage. In this study, an ASP methodology for two operation mode, full power and low power/shutdown operation, has been developed and applied to significant accident precursors that may occur during the operation of nuclear power plants. Two operational events, loss of feedwater and steam generator tube rupture, are identified as ASPs. Therefore, the ASP methodology developed in this study may contribute to identifying plant risk significance as well as to enhancing the safety of nuclear power plants by applying this methodology systematically.