• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 INTERNATIONAL SYMPOSIUM ON SOIL & GROUNDWATER ENVIRONMENT
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• pp.244-244
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• 2005

• 항공우주시스템공학회지
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• 제15권3호
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• pp.105-113
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• 2021

본 논문은 MIL-STD-810 시험법 501(고온 시험법)과 시험법 502(저온 시험법)를 기반으로 XKT-1(수출형 KT-1) 항공기 고객의 운용 환경과 요구사항에 적합하도록 시험조건과 시험절차를 최적화하여 열 환경시험 프로파일을 제시하였다. 또한, 이렇게 최적화된 고온 및 저온시험 프로파일을 환경시험 종합평가 계획서에 반영하여 국방과학연구소의 기후환경 챔버에서 시험수행 하였다. 본 고온 및 저온 환경시험 프로파일로 XKT-1(수출형 KT-1) 항공기의 고온 및 저온 환경시험수행 결과, 고객 환경 요구사항을 만족하고 혹독한 열 환경에서 신뢰성 있음을 확인하였다. 특히 본 논문에서 제안된 고온 및 저온 환경시험절차와 프로파일은 더 혹독한 환경시험 조건의 수출형 항공기 환경시험에도 응용할 수 있다.

• 한국환경농학회지
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• 제35권4호
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• pp.263-269
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• 2016

본 연구에서는 방제복의 액체침투저항성을 측정하는 방법 중 피펫법을 적용하여 국내 시판중인 5종의 방제복과 일반 shirt에 대해서 체류성, 발수성 그리고 침투성을 측정하였다. ISO 22608 Guideline 'Liquid penetration resistance-Pipette test'에서 요구하는 장치를 사용하였고 시험농약으로는 pendimethalin을 처리하여 GC/MS로 분석하였다. 5종의 방제복은 침투성이 0.0~5.4%로 매우 낮은 침투성을 보였으며 발수성은 67.0~98.1%로 농약이 쉽게 투과되지 않고 물 또는 액체에 의해서 제거될 수 있을 것으로 보였지만, 일반 shirt는 높은 침투성과 낮은 발수성이 확인되어 농약살포 시 손쉽게 피부에 노출될 수 있을 것으로 확인되었다. 현재 국내에서는 방제복에 대한 침투저항성 측정법과 기준이 마련되어 있지 않기 때문에, 본 연구는 방제복의 성능측정의 기준시험법 마련에 도움을 줄 수 있을 것으로 사료된다.

• 비파괴검사학회지
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• 제21권6호
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• pp.642-649
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• 2001

정밀부품이나 기기는 개발과정이나 완료단계에서 부적절한 설계에 의하여 발생할지도 모르는 잠재적인 결함을 방지하기 위하여 시험평가를 실시하게 된다. 본 논문에서는 신뢰성 기술 분야의 기초가 되는 환경시험기술을 소개하였으며 엔코더, 교통신호제어기, 계측기기 및 위성항법 수신기 등 제품단위의 대상품에 대한 시험조건 및 방법 등을 기술하고 시험사례를 보고하였다. 이러한 사례를 통하여 제품의 신뢰성 향상을 위한 복합환경시험의 중요성을 강조하였고 최근 환경시험기술에 대한 인식이 날로 증대되면서 시험기술자 양성, 지그설계기술 그리고 고장해석 및 대책기술의 확보가 매우 필요함을 제안하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권8호
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• pp.269-280
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• 2020

The study investigates Environmental Accounting Information (EAI) as well as factors affecting the environmental accounting implementation by the construction firms listed on the Ho Chi Minh Stock Exchange (HOSE), Vietnam. After eliminating seven enterprises that lacked data, the authors selected a sample of 112 observations from 28 construction businesses listed on the Ho Chi Minh Stock Exchange in the period 2015-2018. This study uses research data extracted from the companies' annual reports. Then, the data are analyzed by Stata 13 software, including descriptive statistics, correlation coefficient analysis, regression analysis of table data using estimation methods (Pooled OLS, REM, FEM), and testing of model defects (heteroskedasticity test, multicollinearity test, autocorrelation test). The results show that construction companies listed on the Ho Chi Minh Stock Exchange have out factors affecting the environmental accounting implementation by these enterprises, including independent audit firm and listed time. While the independent auditor firm has a positive and significant impact, the listed time has a negative influence. In addition, our study has confirmed the role of institutional factors affecting the disclosure level of EAI on the implementation of environmental accounting by construction enterprises listed on the Ho Chi Minh Stock Exchange.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2004년도 춘계학술대회
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• pp.61-65
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• 2004

• Journal of Korean Biological Nursing Science
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• 제18권4호
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• pp.274-279
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• 2016

Purpose: Adolescents who experienced the alcohol consumption have gradually increased. Adolescence is a critical period of the neural plasticity in the brain. Neural plasticity is mediated by neurotrophins and has an impact on cognitive function. Environmental enrichment ameliorates the cognitive function and increases neurotrophins. Thus, we investigated the neuroprotective effect of environmental enrichment on ethanol induced cognitive impairment in adolescent rats. Methods: The ethanol groups and the controls groups were injected with ethanol (0.5g/kg) and phosphate buffered saline, respectively, through intraperitoneal from 28th day of birth for 11 days. The environmental enrichment groups were provided larger cages containing toys than the standard cage. Passive avoidance test and Y-maze test were performed to evaluate the spatial memory. Results: Environmental enrichment+ethanol group showed higher alterations than the standard environment+ethanol group in Y-maze test (p<.05). In hippocampus, The environmental enrichment+ethanol group showed significantly higher level of the number of c-fos positive celsl and density of tropomyosin receptors kinase B receptor than the standard environment+ethanol group (p<.05). Conclusion: So, we suggested that the environmental enrichment played a role as a prophylaxis for prevention of memory impairment induced by ethanol exposure in adolescence.

• 대한지구과학교육학회지
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• 제5권1호
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• pp.114-123
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• 2012

This study investigates the effect of environmental club activities of the creative experiential learning activities on the improvement of students' Environmental Literacy and Pro-environmental Behavior. For that purpose, This study divided 24 students at Jinhae U Elementary School into test groups of 12 students and Control groups of 12 students. Test groups participated in the 'GomGomi' environmental Club for sixteen times from March 2011 to December 2011. Conclusions of this study include; First, we found that the environmental club activities is effective to improve the students' environmental Literacy overall. Specifically, the Environmental Club Activities was effective in the sub-catagories of environmental Literacy such as 'rights of nature' and 'eco-crisis'. However, there was no significant change in the sub-category of 'human exemptionalism' Second, we found that the environmental club activities is effective to improve students' pro-environmental behavior overall. Specifically, the environmental club activities was effective in the sub-domains of Pro-environmental Behavior such as 'cognitive domain' and 'affective domain'. However, there was no significant change in the sub-domains of 'behavioral domain'. Summary, the environmental club activities was shown to be effective for improving their environmental literacy and pro-environmental behavior; This study implies that the environmental club activities of the creative experiential learning activities would be a effective tool to help students to improve their environmental literacy and pro-environmental behavior.

• 한국환경복원기술학회지
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• 제7권6호
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• pp.19-28
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• 2004

Segmental Retaining Wall(SRW) has been variously applying in Civil and Architecture construction. Recently, the application of environmental element in all type's structures came to essential requirement, and the construction cases of retaining wall using reinforced soil and block are more increased than the past. But, this trend more widely was spread environmental element as landscape work for the backside of reinforced retaining wall as well as block itself. New environmental block, Greenstone Block, developed to apply of this tendency. The retaining wall system using Greenstone can be environmental constructing at both block itself and backside of retaining wall. The material tests, the axial compressive strength test of block and bending test of fiber-pipe, exercised to design and construction of vertical SRW, which were satisfied NCMA standard. Through this procedure, Rewall (ver 1.0) was developed, which can be automation design of SRW including internal stability, external stability and local stability. And these can be considered setback of retaining wall, as well the examples of vertical retaining wall using block presented to satisfying the follows; strength of reinforced geotextile, height of retaining wall, surcharge, types of backfill and groundwater level etc. Many problems investigated on after or before of construction were due to local failure, insufficiency of bearing capacity and groundwater level. Especially, the local failure was many occurred to during compaction or after construction, and the cases of SRW construction is similar to the results of model test on vertical SRW.

• 한국환경농학회지
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• 제8권2호
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• pp.148-171
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• 1989