• Architectural research
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• 제17권1호
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• pp.13-20
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• 2015

The physical environment can dramatically affect students' feeling and their behavior, educational attainment, and the way in which we do school activities. Unlimited access to campus areas without appropriate securities have reported an increase of crime in school area and safety issues has encouraged school facility planners to install securities devices at every corner of buildings. However, it is still questionable whether this approach is enough to protect students and staffs from the victimization of crime, including thefts, burglaries and sexual offences. There has been continued doubt about the safety of educational facilities where individual college students are studying and enjoying extra-curricular activities. Therefore, the purpose of this study is intended to investigate the effects of perception of safety by students on the level of academic performance at public outdoor environment of university campus. An extensive literature noted that the central element of modern school design principle mainly holds the theory of crime prevention through environmental design (CPTED) and the concept of defensible space. The second generation of CPTED also focused on social soft issues as well as situational factors, which extends beyond mere physical design to include social factors. The correlation analysis found that the effect of sense of safety does appear to be statistically significant on the facilitation of academic achievement. However, the analysis of Chi-square concluded that the perception of safety was not related to demographic and socio-economic profiles of the group except for gender. Further, stepwise multiple regression analysis revealed that the most prime predictor for academic achievement were 'safe public outdoor space/paths' at university campus environment, implying careful design of public open space and sidewalks based on the guideline of CPTED. The study also demonstrated that as the level of positive perception of safety rose, the overall academic achievement also responded to the specified rate (${\beta}=.99$). Finally, the findings reinforce an evidence that high-quality school environments are a positive factor in student academic performance.

• 한국지역사회생활과학회지
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• 제21권1호
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• pp.81-90
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• 2010

This study aimed to identify the contributors of extra-curricular activities of preschool children focusing on home environmental factors(financial capital, human capital, and social capital) and maternal belief about factors on academic achievement(child's effort, child's ability, teacher's instruction, and maternal teaching). One hundred and seventy three mothers whose preschool children were attending child-care centers in Seoul and Kyunggi-Do participated in the survey. Kinlaw et al.(2001)'s Importance of Effort/Ability Scale was used to assess the mother's belief about the factors on academic achievement. Stipek et al.(1992)'s Activities Sub-scales was revised to measure a social capital, that is the mother's formal and informal activities providing to their preschool child. Educational level was utilized as human capital and monthly income was considered as financial capital. Also, using open ended questions, the subjects were asked to respond to the numbers of extra-curricula activities their child was presently attending, and when he or she began to attend the extra-curricular activity. The main results are as follows. In general, the mothers provided informal activities to their preschool child more than formal activities. Also, they believed the teacher's instruction is the most important and the child's ability the least important in their child's academic achievement. The number of extra-curricular activities was predicted by mothers' formal activities and their belief on their child's ability. The age of starting extra-curricular activities were explained by mothers' formal activities and their educational level.

• 환경생물
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• 제26권4호
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• pp.343-348
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• 2008

본 연구는 ARCS의 학습동기모델 전략(주의집중, 관련성, 자신감, 만족감)을 중학교 환경교과서의 [환경보존]단원에 적용하기 위하여 다른 수업 방식과 비교한 것이다. 이를 위하여 부산광역시에 소재하는 중학교 2학년 135명에게 적용하기 위하여 학생들을 수업전략에 따라서 그룹으로 나누었다. 첫 번째 그룹은 전통주의 방식에 의한 수업을 받는 학생들로 구성되어 있었으며, 두 번째는 구성주의 수업방식을 받는 학생, 세 번째는 ARCS전략을 사용한 구성주의 수업방식을 받는 학생들로 이루어졌다. 사전 인지 검사를 통해 적용하기 전의 선인지를 조사하였다. 학습이 이루어진 후 학생들의 과학적 개념의 인지, 학업성취도, 학습동기 등을 조사하였다. ARCS전략을 사용한 구성주의 수업방식을 받는 학생들의 학업성취도는 평균적으로 다른 그룹의 학생들보다 높았으며 유의한 차이를 나타내었다. 따라서 ARCS전략을 사용한 구성주의 수업방식이 다른 두 그 수업방식에 비해 환경보전 단원에 대해 보다 효과적인 학습동기를 유발한다는 것이 밝혀졌다.

• 한국환경보건학회지
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• 제38권5호
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• pp.438-447
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• 2012

Objective: The objective of this study was to suggest a method through which load duration curve was used to assess the achievement of water quality targets in accordance with the criteria for pollutant load depending on flow rate variation. Methods: The stage-discharge curve and flow duration curve of Jungnang Stream were deduced. Using water quality targets and measurement of the stream, the flow duration curve was also drawn. Based on these, the feasibility of achievement of water quality targets in respect to flow rate was assessed. Results: In terms of the load duration curve of the stream, it was observed that excess of criteria for concentrations of $BOD_5$, $COD_{Mn}$ and SS frequently occurred. On the other hand, when the flow rate was low, the concentrations of T-N and T-P exceeded the criteria. Conclusions: Through the load duration curve, the overall water quality of Jungnang Stream was understood. When the flow rate is high, management of point source of $BOD_5$, $COD_{Mn}$ and SS is needed to achieve water quality targets for Jungnang Stream. On the other hand, when the flow rate is low, the management of non-point source T-N and T-P is necessary to attain the water quality goal.

• 한국물환경학회지
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• 제27권6호
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• pp.885-895
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• 2011

The purpose of this study was evaluated on achievement of the Target water quality (TWQ) with Load Duration Curve (LDC) as well as materials collected through the implementation of Total Maximum Daily Load (TMDL), targeting 41 unit watersheds in the Nakdong River Basin in korea, and examines the adequacy of the LDC method to evaluate the TWQ by comparing methods through current regulations. It aims to provide basic materials for TMDL development in Korea. This determination resulted from the fact that the measured data placed on the LDC mean that they are beyond TWQ in a certain condition of water flow when actually measured load values were displayed in a form of LDC. In addition to water quality surveys, it is considered that information on the level of damage in a water body by water flow grade can be utilized as a basic material to identify compliance with the total admitted quantity, and establish rational plans to improve water quality. This information helps in the identification of the degree of damage in water quality according to water flow.

• 한국환경교육학회지:환경교육
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• 제20권4호
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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.

• 한국환경교육학회지:환경교육
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• 제15권2호
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• pp.61-75
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• 2002

This study was intended to develop a new measure for environmental education research, named ‘Subjectively Responsible Environmental Behavior(SREB), in order to overcome a few of limitations embedded in the previous measures. The results of the study suggested that there were several barriers for learners to take environment-friendly actions, willingness to act was always stronger than self-reported act and the degree of discrepancy between willingness to act and self-reported act is correlated with perceived effectiveness, perceived difficulty, and expected guilty. In terms of participation, this study defined one of major missions of environmental educators is to help learners to identify and overcome such barriers. A new measure that this study has proposed can be better utilized to evaluate effectiveness of environmental education curriculum or programs and find information necessary for modifying the programs than to assess learners' achievement. Some limitations of the proposed measure were also discussed.

• 환경영향평가
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• 제17권1호
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• pp.47-56
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• 2008

Total Maximum Daily Load(TMDL) is a core basin management system to assign total emissions of pollutants to unit basin and emission source within a limit of the target water quality and to secure sustainability. considering "Environment and development" together. By current technical guidance of TMDL, the water quality in the riverbed of which the target water quality is noticed, must achieve the target; and the water quality standard for evaluating achievement of the target should be prescribed as non-excessive probability quality of water on the basis of the pertinent water quality documents. Therefore, the study calculated the target water quality by each unit basin which the target water quality must be noticed through the analysis of probability for water quality documents in rivers at the time of establishing a plan, and the study evaluated the achievement possibility of the target water quality by analyzing and comparing the target water quality plan with the standard water quality to evaluate the achievement of the target water quality. As the result, applying the proposed method to Mihocheon River system, it is concluded that selected the target water quality (Each BOD 3.3mg/1 and BOD 3.0mg/1) in Miho A and Musim A is available. Of course, it showed that the target water quality: BOD 2.5mg/1 in Miho A and BOD 3.0mg/1 in Musim A, could be achieved if the small reduction in B unit area was implemented.

• 한국환경과학회지
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• 제14권8호
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• pp.777-783
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• 2005

For the sustainable management of marine ecosystem in Masan Bay, we have to assess the carrying capacity and standard of target water quality. In this research, we assume that all pollutants loads are treated in Dukdong sewage treatment plant, then we simulate the physical-biological model for prediction water quality for the achievement of standard water quality. In 2001 year, for the achievement of COD 2.5 mg/L, we need to reduce COD $90\%$, nitrogen $30\%$, phosphate $90\%$ than that of the present value, According to these results, the water quality of sewage treatment plant is required to treat COD 13.5 mg/L, nitrogen 33.3 mg/L, phosphate 6,0 mg/L. If the sewage treatment plant will be expanded much larger in 2011, it will need to be treated in COD 6.6 mg/L, nitrogen 2.5 mg/L, phosphate 5 mg/L for the achievement of water quality standard in COD 2.5 mg/L.

• 한국농공학회논문집
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• 제61권3호
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• pp.67-76
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• 2019

The objectives of this study were to analyze trends of water pollutants and to evaluate the achievement of water quality standards by subbasins in the Han River. The trends of 40 water pollutants at 232 water quality measurement points were analyzed. Chemical oxygen demand (COD), Total organic carbon (TOC), Total coliforms (TC), et cetera were found to be worsening trend. For evaluation of achievement, we evaluated water quality arithmetic mean with river environment standards and human health standards at representative points of the subbasin. Biochemical oxygen demand (BOD), TOC, Total phosphorus (T-P), Fecal coliforms (FC), TC exceeded water quality standards, and water quality of human health standards was all satisfied. So, we prioritized pollutants. If pollutants exceed water quality standards or were worse, they were classified first pollutants. Although BOD and T-P are first pollutants because of water quality standards excess, they are continuously improved. Also, it is better to maintain current status because water quality management system of BOD and T-P is well prepared. Meanwhile, TOC, TC, and FC exceed water quality standards. Furthermore, they were worse gradually, but there is a lack of management systems such as water quality standards of the effluence facilities. Therefore, it is necessary to supplement the system. The results of this study can be used as primary data for the establishment of water quality standards and selection of management pollutants.