• Journal of Korean Society for Quality Management
• /
• v.46 no.2
• /
• pp.311-326
• /
• 2018

Purpose: Using international specifications, this study classified international standards and automobile manufacturers' test items based on the kind of test used and determined the test order for ISO 16750. Methods: The effects of international standards' environmental factors were examined, based on the major impacts of the product and the results of product failure. Automobile manufacturers' test items were compared with the test item in the ISO 16750. A generic algorithm was then used to determine the test sequence for ISO 16750. Results: International standards and automobile manufacturers' common test items were classified. The test sequence of ISO 16750 was determined for five cases. Conclusion: Although mechanical and environmental tests share many common features, there are differences in the details of the tests. There is a common sequence of tests, but weights are allocated tests differently.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.25 no.12
• /
• pp.27-33
• /
• 2011

This study aims to suggest some problems, which occur when environmental lighting zone is set by use-zone only, by comparing and analyzing the artificial illumination luminance. In addition, this study aims to review the control standards of light pollution and to suggest a practical environmental lighting zone-setting method. I checked out the standards of average surface luminance and luminance contrast as for light pollution management. In addition, I did some research on evaluation of light pollution on surroundings based on investigation of use-environment as for lighting environment setting method.

• Corrugated packaging logistics
• /
• v.5 no.25
• /
• pp.155-160
• /
• 1998

• Journal of Applied Reliability
• /
• v.17 no.2
• /
• pp.92-102
• /
• 2017

Purpose: Reliability prediction standards consider environmental conditions, such as temperature, humidity and vibration in order to predict the reliability of the electronics components. There are many types of standards, and each standard has a different failure rate prediction model, and requires different environmental conditions. The purpose of this study is to make a sensitivity analysis by changing the temperature which is one of the environmental conditions. By observing the relation between the temperature and the failure rate, we perform the sensitivity analysis for standards including MIL-HDBK-217F, RiAC-HDBK-217Plus and FIDES. Methods: we establish environmental conditions in accordance with maneuver weapon systems's OMS/MP and mission scenarios then predict the reliability using MIL-HDBK-217F, RiAC-HDBK-217Plus and FIDES through the case of DC-DC Converter. Conclusion: Reliability prediction standards show different sensitivities of their failure rates with respect to the changing temperatures.

• Korean Journal of Organic Agriculture
• /
• v.4 no.2
• /
• pp.97-136
• /
• 1995

Recendtly an organic agricultured in Korea is getting a public attention not only for minimizing NO3- contamination of groundwater but also for producing of quility of agricultural products. But still there is not Basic Standards for Organic Agriculture in Korea and Japan since they just believe organic agriculture is one kind of the environmental friendly sustainable agriculture as written in western literature. In the paper it was discussed the core skills and doctrine of IFOAM Basic Standards compare to Korean Organic Farming Method in oder to point out thed disadvantages of overuse of organic fertilizer, 50-150MT/㏊ in each cultivation, intensive monocropping in glass-house without any rotation & legume, and without any green manure. Most korean or-ganic farmer believe that the more they apply organic fertilizer, the better they pro-duce high quility of crops and they practise organic agriculture completely. It was also suggested the overuse of organic fertilizer cause the accumulation of NO3- in rhizosphere and subsequently it might lead to drinkwater pollution by nitrate leaching. In conclusion it is suggested that for successful establishment of organic agriculture, The Association of Korean Organic Agriculture, The Society of Korean Organic Agri-culture and the certification body should be developed the Basic Standards which is acceptable by IFOAM Basic Standards.

• Journal of Environmental Impact Assessment
• /
• v.22 no.3
• /
• pp.203-217
• /
• 2013

This study looked at how to establish effluent limitation standards for formaldehyde, a toxic chemical widely used in industries. To this end, we reviewed Water Quality Based Effluent Limitation (WQBEL), Technology Based Effluent Limitation (TBEL), and water quality criteria for protection of human health and aquatic organism. Based on the results, we estimated formaldehyde effluent limitation standards appropriate to control water quality of industrial wastewater in Korea. However, this study has limits due to the lack of some data necessary in estimating formaldehyde effluent limitation. For example, although water quality criteria based on non-carcinogenic properties of formaldehyde were calculated, those based on carcinogenic properties were not be able to estimate because of the absence of applicable cancer potency factor q1. Without applicable factor, we calculated water quality standards for formaldehyde based on water quality criteria of advanced countries including the United States, while with no water quality standard we referred to applicable drinking water quality standards of other countries. For eco-toxicity based on water quality criteria, proper figures could not be calculated since there have been few reliable data.

• Journal of Korean Society for Atmospheric Environment
• /
• v.18 no.6
• /
• pp.539-546
• /
• 2002

The physicochemical properties of solid wastes generated from seven highway service areas, four branch offices, and one construction site were analyzed in concert with air pollutants including heavy metals emitted from near-by small-scale incinerators. The amount of solid wastes generated from highway areas has been increasing with recent increases in the number of highways and passengers. Twelve incinerators examined in this study generally had capacity smaller than 100 kg/hr, most of which were equipped with cyclone for dust removal. It was seen that the concentrations of the gas-phase air pollutants (e.g., SO$_2$, NO$_{x}$, HCl and H$_2$S) were above the acceptable emission standards except one or two sites. CO concentrations at all incinerators were also higher due to incomplete combustion. In addition, particulate matters showed concentration six times higher at their maximum. The results of heavy metal analysis showed that the concentrations of Cu, Cd, and Ni satisfied the emission standards. whereas Pb at one site and Zn at five sites exceeded the standards. Cr measurement results indicated that 9 of 12 incinerators had higher values than the standard; especially one branch office showed nine times higher than normal concentration. In order to satisfy more stringent emission standards in the near future, it is necessary to install air pollution control system and to develop an intensified management plan.n.

• Journal of Korean Society on Water Environment
• /
• v.27 no.4
• /
• pp.523-532
• /
• 2011

In this study, from 2004 to 2008 influents and discharging effluents from 241 municipal public sewage treatment plants were surveyed. Statistics including average, Coefficient of Variation (CV) and Coefficient of Reliability (COR) for each season, time series analysis for removal efficiency and water quality of effluents, and a comparison of the effluent standards in Korea and other countries were presented. The average concentrations of TN and TP in influents. during winter season were 32.6 and 3.78 mg/L and during other season were 30.8 and 3.61 mg/L in 2008, respectively. The average TN concentration on the basis of the maximum monthly concentrations in the effluents during winter season ranged from 14.2~17.4 mg/L and during other season ranged from 12.2~14.8 mg/L. The TP concentration in the effluents depending on the each season was no big difference. TN removal efficiency decreased from Jan. to Feb. and TP removal efficiency decreased in Jan., Jun and July. Maximum COR during winter season were 0.61 but the COR for TN and TP during other season ranged from 0.96~1.48 and 1.09~1.81, respectively, due to big difference in the standard for TN and TP in effluents depending on the season. TN and TP standards for effluent of sewage treatment during winter season in Korea was much higher than those in other countries. Therefore the lower effluent standards during winter season is essential for the water quality improvement.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.24 no.4
• /
• pp.23-38
• /
• 1997

In this Study, indicators for the evaluation of environmental amenity were determined through the investigation of the resident's consciousness in all thirty one cities and counties of Kyonggi. Also, environmental amenity that the resident feel in terms of recognition level was evaluated and based on the determined environmental indicators, environmental amenity for the physical environmental situation was evaluated. By analyzing the results, basic data for the planning of the future environmental management were prepared. The results of this study can be summarized as follows First, the developed indicators for the evaluation of environmental amenity consist of four intermediate evaluation items and fifteen individual evaluation items, and fifty four evaluation standards in total . Two to five evaluation standards were determined for the respective individual evaluation items. Second, using the developed indicators, the evaluation of environmental amenity were implemented based on both resident's consciousness and statistical data. Third, by analyzing the difference between two evaluation results, future research plan was proposed.

• Journal of The Korean Society of Agricultural Engineers
• /
• v.61 no.3
• /
• pp.67-76
• /
• 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.