• 한국의류산업학회지
• /
• 제17권6호
• /
• pp.965-977
• /
• 2015

This study aims to investigate determinants that included personal values, pro-environmental beliefs, and proenvironmental norms for enhancing consumers' purchase intention of eco-friendly outdoor wear exploring Stern(2000)’s the value-belief-norm theory. A survey was conducted with females and males between the ages of 20 and 60 who have experienced buying outdoor wear products. A total of 300 responses were analyzed by descriptive analysis, factor analysis, a reliability test, an independent samples t-test, and regression analysis. The results of this study were as follows: 1) The results of exploratory factor analysis and reliability test on the personal value clearly showed factorial structures including the social power, ecologic value, openness, equality, and altruistic value. 2) There are significant differences in personal value sub-dimensions, pro-environmental beliefs, pro-environmental norm, and purchase intention of eco-friendly outdoor wear products according to respondents' gender and age. 3) Personal values, but not social power, affect pro-environmental beliefs; in turn, pro-environmental beliefs affect pro-environmental norms, which then affects purchase intentions of eco-friendly outdoor wear. The findings support the conclusion that there is significant causality among personal value such as ecologic, openness, equality, and altruistic, pro-environmental belief, and pro-environmental norm. This study suggests pragmatic implications to understand outdoor wear consumers' socio-psychological and demographic factors and to augment purchase intentions of eco-friendly outdoor wear products.

• Journal of Korean Biological Nursing Science
• /
• 제19권4호
• /
• pp.276-283
• /
• 2017

Purpose: The aim of this study was to identify the effects of environmental factors on depressive-like behavior and memory function during adolescence. We performed behavior tests in adolescent rats exposed to environmental enrichment, handling, and social deprivation for eight weeks. Methods: Wistar rats were randomly assigned to control, environmental enrichment, handling, and social deprivation groups at the age of four weeks. Results: In the forced swim test, the immobility time in the environmental enrichment group was decreased than that in the control group (p=.038), while the immobility time in the social deprivation group was increased than that in the control group (p=.035), the environmental enrichment group (p<.001), and the handling group (p=.001). In the Morris water maze test, the social deprivation group had an increased latency time than the control group (p=.013) and the environmental enrichment group (p=.001). In the passive avoidance test, the environmental enrichment group had an increased latency time than the control group (p=.005). However, the social deprivation group had reduced latency time than the socially housed groups (control: p=.030; environmental enrichment: p<.001; handling: p<.001). Conclusion: These findings suggest that environmental factors play an important role in emotion and memory function during adolescence.

• 대한환경공학회지
• /
• 제39권3호
• /
• pp.132-139
• /
• 2017

내분비계 장애물질 (EDCs)은 생물체내에 유입되면 내분비계의 정상적 기능을 방해하는 특징이 있으며, 일반화학물질과는 다른 독성기전을 보이기 때문에 기존의 생태독성기법과 달리 EDCs만의 독성을 평가하기 위한 생태독성기법 및 독성종말점의 개발을 위한 연구가 필요하다. OECD, ASTM 및 USEPA와 같은 신뢰성 있는 국제기관에서는 EDCs의 생태독성기법들을 제안하고 있는 상황이다. EDCs가 유해성이 알려진 만큼 국내에서도 EDCs관련 정부지원 사업이 일부 EDCs에 대해 사업장에의 배출량, 환경매체에서 검출농도를 지속적으로 모니터링하고 있으며, EDCs관련 연구들이 보고되고 있다. 그러나 국내에는 EDCs를 대상으로 하는 생태독성기법이 부재한 상황이다. 본 연구에서는 국외 EDCs의 생태독성기법을 조사 및 분석하여 제안된 생물종과 독성종말점의 종류 및 시험조건 파악하고자 하였다. 그 결과, ISO에서는 아직 EDCs 생태독성기법을 따로 제안하고 있지 않은 상태이며, OECD, ASTM, USEPA에서만 수서생물종인 어류 양서류, 물벼룩 및 요각류, 토양생물종인 지렁이, 애지렁이, 톡토기, 진드기, 토양선충, 그리고 퇴적물서식종인 지렁이와 깔따구에 대한 EDCs 평가기법이 제시되어 있고, 생식, 호르몬, 성장, 비탈로제닌, 성비 및 발달 등과 관련된 독성종말점으로 제안되어 있었다. 결론적으로 EDCs 대상의 생태독성 평가방법은 매우 제한적이며, 생태독성 기법 개발 및 독성종말점을 개발하기 위한 연구가 필요한 것으로 판단된다.

• 한국지반신소재학회논문집
• /
• 제20권2호
• /
• pp.1-11
• /
• 2021

본 연구에서는 산업부산물인 고로슬래그와 순환유동층 보일러의 연소재를 주재료로 사용하여 시멘트와 유사한 경화반응을 유도하도록 개발된 친환경 지반안정재를 약액주입재로 사용하기 위한 실내시험과 시험시공에 관련된 연구가 진행되었다. 이를 위해 실내시험에서는 규산소다 및 실리카졸을 A액, 친환경 지반안정재(또는 OPC)를 B액으로 사용하여 시편을 제작하고, 실내시험을 실시하여 공학적·환경적 성능을 분석하였다. 그리고 실제 노후저수지에 시험시공을 실시하고, 현장에서의 투수시험, 전기비저항탐사를 실시하여 적용성을 분석하였다. 실내시험 결과, 친환경 지반안정재를 B액으로 사용한 약액주입재의 호모겔 압축강도는 보통 포틀랜드 시멘트와 비교하여 약 2.88~3.23배 큰 값을 나타내었다. 또한 대부분의 중금속 용출량이 보통 포틀랜드 시멘트와 비교하여 적고, 어독성 시험에서의 생존율도 100%로 나타났다. 따라서 실내시험 결과를 토대로 판단할 때 OPC에 비해 강도적, 환경적으로도 우수한 것으로 분석되었다. 노후 저수지에서의 시험시공 결과에서는 친환경 지반안정재를 약액주입재의 B액으로 사용하여 보강한 경우, 저수지 내부에서의 투수계수는 1/50 수준까지 감소하였다. 그리고 전기비저항 탐사결과 노후 저수지 내부의 전기비저항은 시간이 경과함에 따라 증가하여 포화대는 사라졌으며, 전반적으로 보강되는 것으로 분석되었다.

• 한국환경보건학회지
• /
• 제20권4호
• /
• pp.80-89
• /
• 1994

It was reported that BCF's (Bioconcentration Factor) on Carbaryl and BPMC in concentration of 1, 2, 5 and 10 ppm, previously. Carassius auratus(goldfish) was chosen as test organism. Carbamates in fish and in test water were extracted with n-hexane and acetonitrile. GC-ECD was used to detecting and quantitating of Carbamates. Also, partition coefficients were determined with Stir flask method. To evaluate environmental toxicological profiles of tested compounds, experimental concentration were 0.05, 0.1 and 0.5 ppm in contrast to previous report. It was considered that higher BCFs of BPMC due to its higher partition coefficient compared to Carbaryl. The obtained results were as follows: 1. It was possible to determine short term BCF of Carbaryl and BPMC through relatively simple procedure in environmental concentrations. 2. BCF$_3$ of Carbaryl in concentration of 0.05, 0.1 and 0.5 ppm were 4.666 $\pm$ 0.002, 3.622 $\pm$ 0.004, 1.200 $\pm$ 0.002 and BCF$_5$ were 3.897 $\pm$ 0.005, 4.219 $\pm$ 0.017 and 1.186 $\pm$ 0.054, respectively. In the case of BPMC in same condition, BCF$_3$ were 4.077 $\pm$ 0.014, 4.900 $\pm$ 0.005, 4.750 $\pm$ 0.009 and BCF$_5$ were 3.465 $\pm$ 0.010, 4.612 $\pm$ 0.011 and 4.075 $\pm$ 0.012, respectively. 3. Carbaryl concentration in fish extract was increased as increasing test concentration, but BCF were decreased as prolonging test period, especially dropped at 0.5 ppm. 4. In the case of BPMC, BCF were decreased as increasing test concentration, but the concentration in fish extract of 3-day test group was slightly higher than that of 5-day test group. 5. Higher BPMC concentration in fish extract was due to its higher partition coefficient to compared with Carbaryl. 6. Determined logP of Carbaryl and BPMC were 2.200 and 3.180. But the calculated BCF using suggested equation was so different that predict BCF. It is suggested that BCF's of Carbamates have to be determined by experiment.

• 한국환경과학회지
• /
• 제17권8호
• /
• pp.899-905
• /
• 2008

Quality test for activated carbon(AC) filter used for drinking water purifier is now an obligatory test and the standard material for valid purifying amount in water purifier performance test has been changed from residual chlorine to chloroform according to the notice of Ministry of Environment in 2006. Therefore, this study aimed to compare the ingredients of AC filters by confirming chloroform removal rate of AC filter and conducting 4 adsorption tests (Iodine, methylene blue decolorization, phenol value, ADS value) for AC filters provided by manufacturers. With water pressure of $1kgf/cm^2$, 1,500 liters of prepared inflow went through to check chloroform removal rate. As a result, product with removal rate of below 60% from all products. On the other hand, 4 adsorption tests were conducted for filters in the market and filters from manufacturers. None of the products satisfied all 4 tests. In particular, they showed great shortage to the standard in phenol value and ADS value test. However, manufacturers' filter showed much better performance than filters in the market. Also, the result of valid purifying amount test for each of five products of appropriate product and inappropriate product based on filter quality test showed average 4,440 liters for appropriate product and average 2,620 liters for inappropriate product. According to the result, it is shown that the filter with good adsorption also had good chloroform removal efficiency and adsorption efficiency. Therefore, it is expected that customers can screen good quality product through obligatory conduct of filter quality test. However, it is considered that complementation in system is required for future inspection.

• 한국항공우주학회지
• /
• 제49권2호
• /
• pp.147-154
• /
• 2021

본 논문에서는 고정익 항공기 환경제어장치(Environmental Control System) 운용 시 발생될 수 있는 냉각공기의 급격한 온도변화가 항공전자장비에 미치는 영향성을 알아보기 위한 시험장비 구성 및 설계안을 제시한다. ECS 시동 시, 항공기 ECS에서 공급되는 공기의 온도는 초당 5.0℃로 높아질 수 있다. 항공전자장비 개발 시 ECS에서 냉각공기를 제공받는 항공전자장비의 운용성 확보를 위하여, 냉각공기 특성 시험환경을 구현할 수 있는 시험장비가 필요하다. 시험장비 설계 시 열/유동해석을 수행하여 냉각공기의 급격한 온도변화율의 가능성을 확인하였고, 실제 탑재되는 항공전자장비를 적용하여 구현된 시험장비의 성능을 확인하였다.

• 전기학회논문지
• /
• 제64권6호
• /
• pp.948-953
• /
• 2015

In this paper, we studied the environmental requirements for the railway transponder system. The transponder system is comprised of a reader installed beneath the train, a tag installed on the track, and a portable programmer. Among them, the transponder tag should be designed to withstand harsh environments, such as wide operating temperature range, mechanical shock and vibration, etc. To validate stable and reliable service under railway conditions, we carried out environmental test for transponder tag. We then installed the tags on the Honam high-speed test line.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2010년도 춘계 학술발표회
• /
• pp.595-598
• /
• 2010

Many economical and efficient methods such as sand drain method(SD), plastic board drain(PBD), sand compaction pile, vacuum consolidation method, etc., have been used for soft grounds. The case of sand compaction pile has an effect on accelerating consolidation and increasing bearing capacity by penetration at regular intervals under soft grounds for reducing the drainage path. But, this method has caused not only the nature damage by extracting the sands indiscreetly but also the economical problem for importing the sands because it needs so much sand to make the sand compaction pile. Thus, this study choosed the bottom ash which has similar engineering characteristics with sand. It was performed that clogging test and large direct shear test changing the bottom ash replacement ratio in soft ground for studying strength characteristics of soft ground using bottom ash compaction pile. As a result of the test, the internal friction angle was largely increased and the cohesion was decreased as the replacement ratio increased.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2010년도 춘계 학술발표회
• /
• pp.229-239
• /
• 2010

Performing a series of in-situ thermal response tests, the effective thermal conductivity of six vertical closed-loop ground heat exchangers was experimentally evaluated and compared each other, which were constructed in a test bed in Wonju. To compare thermal efficiency of the ground heat exchangers in field, the six boreholes were constructed with different construction conditions: grouting materials (cement vs. bentonite), different additives (silica sand vs. graphite) and the shape of pipe-sections (general U-loop type vs. 3 pipe-type). From the test results, it can be concluded that cement grouting has a higher effective thermal conductivity than that of bentonite grouting, and the efficiency of graphite better performs over silica sand as a thermally-enhancing addictive. In addition, a new 3 pipe-type heat exchanger provides less thermal interference between the inlet and outlet pipe than the conventional U-loop type heat exchanger, which results in superior thermal performance.