• Title/Summary/Keyword: Daegu Industrial complex

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Chemical Characteristics and Particle Size Distribution of PM10 in Iron and Steel Industrial Complex (포항철강공단 미세먼지(PM10)의 입경분포 및 화학적 특성)

  • Jung, Jong-Hyeon;Lee, Hyung-Don;Jeon, Soo-Bin;Yoo, Jeong-Kun;Shon, Byung-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.11
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    • pp.5601-5609
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    • 2012
  • The fine particulate matter($PM_{10}$) concentrations and contents were measured to check the health and environment influential factors in Pohang Iron and Steel Industrial Complex and its vicinities. In addition, the $PM_{10}$ distribution for each year and season was surveyed using the regional air quality monitoring stations. The measuring on the $PM_{10}$ inside the industrial complex showed $61.3{\pm}12.1{\mu}g/m^3$ for average concentration of $PM_{10}$ which was measured by Dongil Industry and $44.3{\pm}8.1{\mu}g/m^3$ measured by steel manufacturing industry complex management office. Both of them satisfied the environmental air quality standard. The percentage of $SO_4{^2}$, $NO_3{^-}$, $NH_4{^+}$ which are the secondary ions created out of the $PM_{10}$ in Dongil Industry and steel manufacturing industry complex management office was checked and it was revealed that the percentage of ${SO_4}^{2-}$ was high and it is considered that the pollution source related with the sulfides exist at the industrial complex. They were in order of ${SO_4}^{2-}$ > $Cl^-$ > $NO_3{^-}$ > $F^-$ > $NH_4{^+}$ in Dongil Industry and ${SO_4}^{2-}$ > $Cl^-$ > $NO_3{^-}$ > $NH_4{^+}$ > $F^-$ in steel manufacturing industry complex management office.

The PM2.5 Concentration and Components Characteristics in Miryang (밀양지역의 PM2.5 농도 및 성분특성)

  • Suh, Jeong-Min;Kim, Young-Sik;Jeon, Bo-Kyung;Choi, Kum-Chan;Ryu, Jae-Yong;Park, Jeong-Ho
    • Journal of Environmental Science International
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    • v.16 no.12
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    • pp.1355-1367
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    • 2007
  • This study summarizes the relations among $PM_{2.5}$ concentration, water-soluble ions concentration, metallic element Components characteristics and SPSS in negative ion and metallic element of $PM_{2.5}$ particle in Miryang.(By the urban area, the industrial complex area and the suburban area according to the season) $PM_{2.5}$ concentration of total 72 samples collected from 3 sites turned out to range from 3.47 to 34.7 ${\mu}g/m^3$, and the average concentration was the suburban area-the kin nup(16.00 ${\mu}g/m^3$) > the urban area-the roof of the old Miryang university(10.32 ${\mu}g/m^3$) > the industrial complex-Sapo industrial complex(10.29 ${\mu}g/m^3$). In particular, the suburban area had $PM_{2.5}$ concentration 1.5 times those of urban area, industrial complex. It was thought although the site was suburban and farm-side without pollutants around, it had a higher concentration value influenced by external factors including the brickyard, small-scale incinerator, driving range construction, construction on the Daegu-Busan express and the widening of the four-lane road between Miryang-Anyang nearby. As for water-soluble ions among $PM_{2.5}$ particle collected in Miryang area, $SO4_{2^-}$ accounted for 60% and $NO_{3^-}$, was 30% in spring and summer. And $NO_{3^-}$ accounted for 50% and $SO4_{2^-}$ was 35% in fall and winter. The AI value of metallic Components among $PM_{2.5}$ particle collected in Miryang area had a high value influenced by the apartment complex construction and the extension work of road. The industrial complex area had Zn concentration 3 times, and Fe concentration 2 times those of urban area and suburb area. When it comes to the relation with metallic elements in urban area, the highest coefficient of correlation was between Cr-Fe with 0.85, and Pb-Cd turned out in the reverse correlation. Among metallic elements, the coefficients of correlation between Zn and Cr, Mn, Fe, NI were high in industrial complex area. The highest coefficient of correlation was between Mn-Zn with 0.88, meanwhile Ni and Cu, Cd turned out in the reverse correlation in the suburb area. These coefficients of correlation are attributed to the difference in pollutant sources, rather than difference in pollutant and non-pollutant.

Effects of an Intensively Complex Physical Therapy Program on the Pain, Range of Motion, Muscle Strength, Function, Quality of Life, and Depression of Patients with Traumatic Rotator Cuff Injury caused by an Industrial Accident -A Pilot Study- (집중 복합 물리치료 프로그램이 산재 외상성 어깨둘레근 손상 환자의 통증, 관절가동범위, 근력, 기능, 삶의 질과 우울증에 미치는 영향 -예비연구-)

  • Bae, Young-Hyeon;Kim, Sun-Mi;Kim, Min-Ju;Choi, Joon-Kyung;Kim, Kyung-Ae;Ko, Moon-Ju;Kim, Young-Bum
    • PNF and Movement
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    • v.16 no.2
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    • pp.275-286
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    • 2018
  • Purpose: This study aimed to investigate the effect of an intensive rehabilitation program on the pain, range of motion (ROM), muscle strength, function, quality of life (QoL), and depression of patients with traumatic rotator cuff injury caused by an industrial accident. Methods: Seventeen patients with traumatic rotator cuff injury caused by an industrial accident participated in this study. The 12-week treatment included 30 min of manual therapy and 30 min of exercise therapy twice a day, five times a week. The outcomes were measured for evaluating the pain, ROM, muscle strength, function, QoL, and depression before the commencement of the program and after 4, 8, and 12 weeks. Results: According to the time of applying the intensive rehabilitation program, the pain (p<0.01), ROM (p<0.01), muscle strength (p<0.01), function (p<0.01), and depression (p<0.05) significantly improved with time. However, QoL was not statistically significant. Conclusion: This study confirmed the excellent effect of an intensive rehabilitation program on the pain, ROM, muscle strength, function, and depression of patients with traumatic rotator cuff injury caused by an industrial accident. However, this study was limited by the absence of a control group. This pilot study highlights the need for more extensive research with a larger sample.

A Classification and Selection of Reliability Growth Models

  • Jung, Won;Kim, Jun-Hong;Yoo, Wang-Jin
    • Journal of Korean Society for Quality Management
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    • v.31 no.1
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    • pp.11-20
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    • 2003
  • In the development of a complex systems, the early prototypes generally have reliability problems, and, consequently these systems are subjected to a reliability growth program to find problems and take corrective action. A variety of models have been proposed to account for the reliability growth phenomena. Clear guidelines need to be established to assist the reliability engineers for model selection. In this paper, some of more well-known growth models are surveyed and classified. These models are classified based upon distinguishing model features. A procedure for model selection is introduced which is based on this classification.

The Study on Application of a Heat annexation power plant Source Waste Aggregate as Concrete Aggregate (열병합발전소의 열원폐자재를 골재로 활용한 콘크리트특성에 관한 연구)

  • Lee Myoung-Hyol;Kim Hyo-Youl;Lim Nam-Gi
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.05a
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    • pp.99-104
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    • 2005
  • This study is as a part of the new disposal and recycling plans of heat-resource waste of Daegu dyeing, industrial center we tried to examine applicable possibility of crushed thing(waste aggregate) as aggregates for mortar and concrete. To examine applicable possibility of waste aggregate as a lightweight-aggregate for concrete and mortar, we carried this study by mainly property examination of concrete according to replacement ratio of waste aggregate. We carried slump, unit weight, compressive strength and bending strength test according to replacement ratio of waste aggregate. As the result of that, if we use waste aggregate, lightweight of concrete and mortar will be possible. Specially it shows a strength improvement effect of cement hardening according to using this so it is judged that applicable possibility as aggregate for concrete and mortar is very excellent.

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Applying CVM for the Reinvestment Ratio of Development Profits Generated by Renewing Old Industrial Park in Daegu Metropolitan City (CVM 분석을 이용한 개발이익 재투자 비율 설정에 관한 연구: 대구광역시 노후산업단지 재생사업을 중심으로)

  • Shin, Woo-Hwa;Shin, Woo-Jin
    • Land and Housing Review
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    • v.13 no.4
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    • pp.27-44
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    • 2022
  • In December 2019, the Ministry of Land, Infrastructure and Transport announced the revision of the Enforcement Decree of the Industrial sites and Development Act. In this revision, the reinvestment ratio of development profits generated by renewing the old industrial park is delegated to the local government ordinance. According to this announcement, the reinvestment ratio can be adjusted to less than 50% of sales revenue from construction projects and 25% of land sales for non-industrial use depending on local government conditions. This study aims to investigate the policy rationale for the adjusted ratio of reinvestment in development profits and explore how Daegu City can use this policy when revising ordinances in the future. A survey was conducted with a total of 320 experts, including public corporations, public officials, and industrial site workers in the Industrial Complex Committee. We employ contingent value measurement (CVM) based on 262 valid responses. The results showed that 27% of sales from the construction business and 22% of sales from non-industrial land were derived with an appropriate reinvestment ratio. Although the results in this study might not be generalized in other regions, we provide a potential reference for other local governments who are interested in ordinance revisions in the future. Another contribution of this study is to suggest the statistical method to derive the relevant ratio.

Scheduling of a Casting Sequence Under Just-In-Time (JIT) Production (적시 생산 방식에서의 주조공정 스케줄링)

  • Park, Yong-Kuk;Yang, Jung-Min
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.32 no.3
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    • pp.40-48
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    • 2009
  • In this article, scheduling of a casting sequence is studied in a casting foundry which must deliver products according to the Just-in-time(JIT) production policy of a customer. When a foundry manufactures a variety of casts with an identical alloy simultaneously, it frequently faces the task of production scheduling. An optimal casting schedule should be emphasized in order to maximize the production rate and raw material efficiency under the constraints of limited resources; melting furnaces and operation time for a casting machine. To solve this practical problem-fulfilling the objectives of casting the assigned mixed orders for the highest raw material efficiency in a way specified by the customer's JIT schedule, we implement simple integer programming. A simulation to solve a real production problem in a typical casting plant proves that the proposed method provides a feasible solution with a high accuracy for a complex, multi-variable and multi-constraint optimization problem. Employing this simple methodology, a casting foundry having an automated casting machine can produce a mixed order of casts with a maximum furnace utilization within the due date, and provide them according to their customer's JIT inventory policy.

Reliability Optimization Problems using Adaptive Hybrid Genetic Algorithms

  • Minoru Mukuda;Yun, Young-Su;Mitsuo Gen
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2003.09a
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    • pp.179-182
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    • 2003
  • This paper proposes an adaptive hybrid genetic algorithm (aHGA) for effectively solving the complex reliability optimization problems. The proposed aHGA uses a loca1 search technique and an adaptive scheme for respectively constructing hybrid algorithm and adaptive ability. For more various comparisons with the proposed adaptive algorithm, other aHGAs with conventional adaptive schemes are considered. These aHGAs are tested and analyzed using two complex reliability optimization problems. Numerical result shows that the proposed aHGA outperforms the other competing aHGAs.

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A Study on the Results of Questionnaire Survey and Health Examination for Respiratory Disease among Residents in Briquette Fuel Complex in Ansim, Daegu (안심연료단지 주변지역 주민의 호흡기계질환에 대한 설문조사 및 건강검진 결과 분석)

  • Lee, Kwan;Lim, Hyun-Sul;Kim, Min-Gi;Min, Young-Sun;Lee, Young-Hyun;Kim, Sung-Woo;Choi, Hye-Sook;Ahn, Yeon-Soon;Sakong, Joon;Yu, Seung-do;Kim, Geun-Bae;Yoon, Mi-Ra
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.25 no.3
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    • pp.355-365
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    • 2015
  • Objectives: This study was conducted to better understand the relationship between health effects and exposure to dusts from a briquette fuel complex in Ansim, Daegu, Korea. Methods: The subjects of this study consisted of 2,980 persons over 40 years old who had lived 20 years or more around a briquette fuel complex in Daegu. We conducted a questionnaire survey, and chest radiography was performed. In addition, chest computed tomography(CT) (335 cases) and pulmonary function test(PFT) (658 cases) were done. Pneumoconiosis was diagnosed if one of three radiologists determined(or suspected) pneumoconiosis. We also conducted in-depth interviews for pneumoconiosis cases. We defined the exposed group as subjects residing within a 500 meter radius from the walls of the briquette fuel complex, and the others were defined as the control group. Results: Subjects in the exposed and control groups are respectively 715(24%) and 2,265 cases(76%). Major respiratory symptoms in the exposed group such as sputum, dyspnea, chest tightness and wheezing were significantly higher than in the control group. By chest radiography, 173 cases of pneumoconiosis or suspicious pneumoconiosis were detected. By PFT, 62 cases(29.5%) of chronic obstructive pulmonary disease(COPD) among 210 asymptomatic subjects were detected. Finally, by chest CT we concluded 28 cases to be pneumoconiosis, and eight cases among them proved to be pneumoconiosis by environmental exposure. Conclusions: Through this study, we concluded that health outcomes such as respiratory symptoms, pneumoconiosis, and COPD were caused by continuous exposure to dusts from the briquette fuel complex. Policies to reduce environmental exposure are needed, and cases of environmental disease should be intensively followed up by the government.

Analysis and estimation of the BTEX using Canister­GC/MS in Seongseo Industrial Complex (Canister와 GC/MS를 이용한 대구성서산업단지의 BTEX의 분석 및 평가)

  • Kim Tae-Sub;Choi Sung-Woo
    • Journal of Environmental Science International
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    • v.14 no.3
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    • pp.351-358
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    • 2005
  • The research in this paper was carried out to examine the BTEX(Benzene, Toluene, Ethylbenzene, Xylene) concentrations in Seongseo Industrial Complex. These compounds are the major constituents, more than $60\%$ in composition of total VOCs, mainly charging in ambient air. BTEX samples were collected from the 38 sites, 10 for the source points and 18 for the boundary sites, and were analyzed by canister-GC/MS. The mean concentrations of BTEX were 33 ppbv for benzene, 214 ppbv for toluene, 89 ppbv for ethyl benzene, 77 ppbv for xylene. Among the BTEX, toluene had the highest concentration in the source points and boundary sites. In the source points, BTEX concentration of incineration facility for hazardous wastewater appeared highly in the range of 220­350 ppbv. BTEX concentrations in source boundary sites appeared in the order of toluene>ethylbenzene>xylene>benzene. As a result of the correlation analysis, the concentration of the source points was related to those of the boundary sites. Correlation of ethylbenzene and xylene was presented to 0.7991(P<0.0 1),\;0.6329(P<0.05) as the correlation coefficient, respectively.