• Economic and Environmental Geology
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• v.40 no.3 s.184
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• pp.263-275
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• 2007

The purpose of this study was to show the pollution characteristics of hazardous elements from roadside dust in the Gwangju city. We collected 47 samples from November to December in 2004 and separated four groups such as residential area, industrialized area, downtown area and heavy traffic area fer characteristics comparison on hazardous elements. Roadside dust mostly consisted of quartz, albite, microcline, muscovite in XRD analysis. Content of hazardous elements varied: As $3.4{\sim}11.9 ppm$, Cd $0.2{\sim}28.2 ppm$, Co $32{\sim}526 ppm$, Cr $25{\sim}526 ppm$, Cu $11{\sim}375 ppm$, Ni $14{\sim}247 ppm$, Pb $13{\sim}413 ppm$ and Zn $101{\sim}972 ppm$. Average contents of hazardous elements of Zn>Cu>Pb>Cr>Co>Ni>Cd. Content of hazardous elements was low in residential area, whereas that of heavy metal was much the same in both in heavy traffic area. Content of hazardous elements such as Cd, Co, Cr, Cu, Ni, Pb, Zn was found to be particularly high in industrialized area. According to these results it was possible to presume that industrialized area was affected by industry activity such as machinery, petrochemical, automobile and electronics industry. The SEM analysis, detected Pb, Cr, Ni, and Fe particles in samples of industrialized area contaminated by industry activity. The correlation coefficient table resulted from the samples of roadside dust showed that there was same direction increase of content between elements. In other words, when the content of Cd increase, Cr and Ni increase, as Cr increase, Cu and Ni increase, as Cu increase Ni increase and Pb increase Zn increase. Based on these results it was possible to predict and interpret similar contamination patterns in this study.

• Journal of the Korean Association of Geographic Information Studies
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• v.24 no.1
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• pp.92-111
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• 2021

As fine dust negatively affects disease, industry and economy, the people are sensitive to fine dust. Therefore, if the occurrence of fine dust can be predicted, countermeasures can be prepared in advance, which can be helpful for life and economy. Fine dust is affected by the weather and the degree of concentration of fine dust emission sources. The industrial sector has the largest amount of fine dust emissions, and in industrial complexes, factories emit a lot of fine dust as fine dust emission sources. This study targets regions with old industrial complexes in local cities. The purpose of this study is to explore the factors that cause fine dust and develop a predictive model that can predict the occurrence of fine dust. weather data and fine dust data were used, and variables that influence the generation of fine dust were extracted through multiple regression analysis. Based on the results of multiple regression analysis, a model with high predictive power was extracted by learning with a machine learning regression learner model. The performance of the model was confirmed using test data. As a result, the models with high predictive power were linear regression model, Gaussian process regression model, and support vector machine. The proportion of training data and predictive power were not proportional. In addition, the average value of the difference between the predicted value and the measured value was not large, but when the measured value was high, the predictive power was decreased. The results of this study can be developed as a more systematic and precise fine dust prediction service by combining meteorological data and urban big data through local government data hubs. Lastly, it will be an opportunity to promote the development of smart industrial complexes.

• Journal of Environmental Impact Assessment
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• v.33 no.2
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• pp.64-73
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• 2024

As the seriousness of habitat destruction caused by development projects emerges, the importance of environmental impact assessment (EIA) is increasing to preserve biodiversity. In previous studies, research is being conducted to quantitatively evaluate the biodiversity impact of development factors and surrounding environmental factors on the landscape scale, but research on the factors affecting the reduction of biodiversity based on development projects is insufficient. This study examined whether independent variables (size of development project, type of the development, DEM, ecosystem and nature map, distance from the green land, distance from the protected area), which have been proven to effect biodiversity through the previous researches, have a significant effect on the change of richness index (RI) through multi-class logistic regression analysis, T-test, and analysis of the development type. As a result, only the size of development project and the first richness index in EIA showed p-value less than 0.05. And it was confirmed that the reduction in biodiversity was significantly changed in the following construction types: installation of sports facilities, energy development, and development of industrial location and industrial complex. Since the results of this study confirmed that the impact of the variables may be inconsistent depending on the analysis scale, additional study of necessary indicators at the development project is needed to analyze biodiversity changes in EIA accurately.

• Journal of Digital Convergence
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• v.14 no.5
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• pp.411-420
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• 2016

Movement of Province Government Office of Chungcheongnam-do is pursued to balance regional development of South Chungcheong Province. The Head Office was built in Naepo area(Hongsung & Yeasan) which is located in the center of Chungnam geographically to promote balanced regional development. Stage two goals for 2015 of city construction is staying at the level of 20 %. The cause is very complicated, but it can be explained by central government agencies in the establishment of the Sejong City and relocation of the central government policy support. This study is looking for new strategies to get competitive power and Regional Festival which leads the mood and industry in the new city, Naepo.

• Journal of environmental and Sanitary engineering
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• v.21 no.1 s.59
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• pp.35-43
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• 2006

Formaldehyde is important because of their irritant and toxic properties, mutagenicity and carcinogenicity. In this study, liquid chromatography-mass spectrometry (LC-MS) is used for the analysis of formaldehyde after derivatization with 2,4-dinitrophenylhydrazine (DNPH) cartridge. Analytical parameters such as linearity, repeatability and minimum detection limit were evaluated. The linearity ($r^2$) was 0.9997 when analyte concentration ranges from 25 to $200{\mu}g/l$. The relative standard deviation (%RSD) was 1.25 % for concentration of $200{\mu}g/l$. The minimum detection limit (MDL) was 0.73 ppbv. It was shown that LC-MS method has a great potential for formaldehyde analysis. The results of formaldehyde from the survey of Ban-Woll and Shi-Hwa Industrial Complex samples, the highest level was 6.20, 3.93 ppb, respectively. The highest emission level of formaldehyde at chemical plants in the Ban-Woll' Shi-Hwa Industrial Complex was 5421.25 ppb.

• Korean Journal of Construction Engineering and Management
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• v.5 no.6 s.22
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• pp.154-161
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• 2004

The term 'well-being' which becomes a popular trend in various industries has been introduced in the housing market as well. This trend could be understood as an emerging trend rooted to customers' preference for apartment enabling residents to live comfortably and healthy in 2000s. The housing industry has attempted to meet customers' requirements by presenting' well-being apartments' emphasizing healthy and natural-friendly aspects. For instance, suppliers in the industry has adopted master plans and unit plans to support well-being residence. In addition, they introduced less-toxic-emission materials to interior However, it has been unknown that customers in the housing market also agree to well-being functions presented by suppliers and, if then, which aspects they consider mon important In order to answer questions stated above, a research to investigate perceptions of potential customers in Busan towards well-being apartments is designed and this paper is a summarized result. Based on the real-world investigations, the important functions or concepts relevant to well-being apartments perceived by customers are defined and suppliers' approach to meet these Is presented.

• Korean Journal of Construction Engineering and Management
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• v.7 no.3 s.31
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• pp.159-168
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• 2006

In order to respond to interest and regulations in sustainable environment which is increasing, construction industry needs to establish a sustainable production system. When generation of wastes can be diminished and recycling of them raised in the construction site as a part of a sustainable production system, it might contribute to not only establishing a sustainable production system but also gaining economical profit. This study is a preliminary research for establishing a sustainable production system, which aims to identify construction waste generation patterns and factors causing construction waste generation. Case studies were implemented to investigate these patterns and factors.

• 한국해양학회지
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• v.11 no.1
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• pp.25-33
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• 1976

The physical factors and chemical contents were studied at 8 stations within Masan Bay, differing in depth and location with respect to inner and outer harbours. It is a relatively small bay with a long and narrow outlet. The water temperature and salinity at the inner bay was rather subject to change on weather condition of the neighbouring land than on the effects of the water mass of outer bay. The high nutrient contents in the bay were caused by the sewage and industrial activities. The outer harbour was less polluted than that of the inner bay; the high contents were significantly decreased from the entrance of the outer harbour. While the high disolved oxygen contents, over saturation in the surface strata may be the result of nearly all year round phytoplankton blooms, the lack of oxygen contents in the bottom strata were caused by the inadequate mixing of water mass and organic matters. The frequent red tide in the area may be the results of inflowing raw sewage, industrial activities of neighbouring land and inadequate mixing of water masses.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.2
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• pp.207-212
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• 2016

High-frequency induction hardening (HFIH) is used in many industries and has a number of advantages, including reliability and repeatability. It is a non-contact method of providing energy-efficient heat in the minimum amount of time without using a flame. Recently, HFIH has been actively studied using the finite-element method (FEM), however, these studies only focused on the accuracy of the analysis. In this paper, we analyzed HFIH by using a variable frequency based on the conditions of the same shape and input power then comparing the analysis results to experimental results. The analysis and experimental results indicate that the hardening depths are approximately the same using the optimal frequency of 3kHz.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.993-997
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• 2009

Designs in the modernism era were produced for the purpose of standardization of items and devices centered on efficiency and functions, and the will of design consumers in the industrial era, when consumption exceeded production, was limited to the objects of consumption. But, after the post-modernism era, design consumers have started to entail acts of exclusive possession such as participation in the design idolization, partipation, tuning, control and parody as design consumers in the digital environment do not passively accept what is given to them anymore, and aggressively intervene in the process of design production and management. It is expected that designs will change from the system in which only professionals can produce and manage its production to that of cooperating with consumers to produce designs, and various forms of consumers' exclusive possession will change all sort of design environments including production methods surrounding design products and distribution. Therefore, this study seeks to induce efficient design production by understanding changes of consumers' cultural environment resisting standardization and structuralization with smoothy perception between producers and consumers through classification of consumers' appropriation into de-construction, re-signification and self-identification.