• Title/Summary/Keyword: Industrial city

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The effect of mindfulness on happiness in middle and high school students: The dual mediating effect of gratitude and self-esteem (중고등학생의 마음챙김이 행복에 미치는 영향: 감사성향과 자아존중감의 이중 매개효과)

  • Deok Hyung Kim;Eun Mi Shin;Chang Seek Lee
    • Industry Promotion Research
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    • v.9 no.2
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    • pp.59-67
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    • 2024
  • This study aims to confirm the dual mediating effect of gratitude and self-esteem in the relationship between mindfulness and happiness in middle and high school students and to provide basic data that can improve happiness. The study subjects were middle and high school students living in S City in South Chungcheong Province, and data were collected through a survey. For collected data analysis, SPSS PC+ Win. ver. 25.0 and SPSS PROCESS macro ver. 4.2 were used. Data were analyzed by applying frequency analysis, reliability analysis, correlation analysis, and double mediation effect analysis techniques. As a result of the study, first, there was a significant positive correlation between mindfulness, gratitude, self-esteem, and happiness. In particular, there was the highest correlation between gratitude and self-esteem. Second, gratitude and self-esteem had a double mediating effect in the relationship between mindfulness and happiness in middle and high school students. These results can be used as a new practice model to improve happiness by utilizing psychological variables such as mindfulness, gratitude, and self-esteem for middle and high school students.

A fundamental study on the minimize wear of slurry shield TBM sludge bend pipe (이수식 쉴드 TBM 배니곡관 마모 최소화를 위한 기초 연구)

  • Soo-Jin Lee;Hyeon-Do Kim;Yong-Woo Kim;Sang-Hwan Kim
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.26 no.3
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    • pp.243-254
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    • 2024
  • Currently, due to industrial development in domestic regions, buildings are saturated not only in major city centers but also in surrounding urban areas. Accordingly, people's attention has focused on underground spaces, and tunnels are being widely used, especially in urban development. Research on tunnels and tunnel excavation methods is actively underway. However, there is a lack of research on the wear and tear problems of sludge discharge pipes when using a slurry shield TBM. Therefore, in this paper, the L-shaped bend pipe used in the existing sludge discharge pipe was transformed into a T-shaped bend pipe to move sludge. As a result, it was confirmed that compared to the L-shaped bend pipe, the impact of the T-shaped bend pipe on the bend pipe when discharging sludge was reduced. Based on these results, it is expected that wear of the sludge discharge pipe can be minimized by using a T-shaped bend pipe when using slurry shield TBM equipment. This is expected to ultimately lead to economic benefits, such as reducing costs due to replacement of curved pipes or additional welding during tunnel construction.

Assessment of Contamination and Geochemical Dispersion by Heavy Metals in Roadside Tree Leaves of Platanus occidentalis and Soils in the City of Seoul (서울시 가로수목 중 플라타너스 잎과 토양의 중금속 원소에 대한 지구화학적 분산과 오염평가)

  • Choo, Mi Kyung;Lee, Jin-Soo;Lee, Jeonghoon;Kim, Kyu-Han
    • Economic and Environmental Geology
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    • v.47 no.4
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    • pp.405-420
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    • 2014
  • To investigate geochemical characteristics of soil and atmospheric environments by anthropogenic source, we have analyzed and determined heavy metal concentrations of the surface soils beneath roadside trees and leaves of Platanus occidentalis from 52 points in Seoul during autumn 2001. For comparison of the contents of heavy metal for the soil and leaf, we have analyzed heavy metal contents of the surface soils beneath roadside trees and leaves from 2 points in rural area of Yesan during the same time period. The composition of heavy metals of soils are relatively high for Cd, Co, Cr and Ni in industrial area (IA, Industrial Area) and high for Cu, Pb and Zn in heavy traffic area (HTA, Heavy Traffic Area). The heavy metal contents of rural area in Seoul are higher than those in Yesan. The differences of chemical compositions between the washed and unwashed leaves are high for Cd, Cu, Pb and Zn in the HTA. The element couples of Cd-Co, Cr-Ni and Pb-Zn for the soils had shown a good correlation and their contamination sources could be similar. The relationship for Pb-Cu and Cu-Zn showed good correlation in Platanus leaves. The relationship between soils and unwashed leaves show a good correlation for Cr, Cu, Pb and Zn but low correlation for Cd, Co, Fe, Mn and Ni. It is thought that the Cr, Cu, Pb and Zn were derived from contaminants of soils, whereas Cd, Co, Fe, Mn and Ni were originated from atmospheric source. From the spatial variations of elements for soils and leaves, Ni and Cr were dominant in the soils of IA and Cd, Cu and Zn were dominant in those of HTA. The Contamination by Cd-Pb and Cu-Zn in unwashed leaves were analyzed to show similar patterns. Using the enrichment factors (EF) of heavy metals in unwashed leaves, the EF sequences were to be Cu, Zn, Pb, Mn, Co, Ni, Cd and Cr. We identified that Cu, Zn, Pb and Mn were most problematic of environmental hazard in Seoul.

Estimation of Urban Heat Island Potential Based on Land Cover Type in Busan Using Landsat-7 ETM+ and AWS Data (Landsat-7 ETM+ 영상과 AWS 자료를 이용한 부산의 토지피복에 따른 여름철 도시열섬포텐셜 산출)

  • Ahn, Ji-Suk;Hwang, Jae-Dong;Park, Myung-Hee;Suh, Young-Sang
    • Journal of the Korean Association of Geographic Information Studies
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    • v.15 no.4
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    • pp.65-77
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    • 2012
  • This study examined changes in land cover for the past 25 years in Busan and subsequently evaluated heat island potential by using land surface temperature and observation temperature data. The results were as below. The urban area of Busan increased by more than 2.5 times for the past 25 years from 1975 to 2000. It was believed that an increase in the pavement area of city within such a short period of time was an unprecedented phenomenon unique to our country. It could be assumed that urban heat island would be worsened through this process. After analyzing the land temperature according to the land cover, it was shown that there were noticeable changes in the temperature of urban & built-up and mountain & forest areas. In particular, the temperature rose to $36{\sim}39^{\circ}C$ in industrial areas during the summer, whereas it went down to $22{\sim}24^{\circ}C$ in the urban areas at whose center there were mountains. It was found that heat island potential according to the level of land cover had various values depending on the conditions of land cover. Among the areas of urbanization, the industrial area's heat island potential is 6 to $8^{\circ}C$, and the residential and commercial area's is $0{\sim}5^{\circ}C$, so it has been found that there is high possibility to induce urban heat islands. Meanwhile, in the forest or agricultural area or the waterside, the heat island potential is $-6{\sim}-3^{\circ}C$. With this study result, it is possible to evaluate the effects of temperature increase according to the urban land use, and it can be used as foundational data to improve urban thermal environment and plan eco-friendly urban development.

A Study of Industrial Patients from Selected General Hospitals in the Kyung Pook and Taegu City Areas (일부지역 산업재해환자 실태 연구 -대구, 경북지역 일부 종합병원 중심으로-)

  • 허춘복;남철현
    • Journal of Environmental Health Sciences
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    • v.17 no.2
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    • pp.78-94
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    • 1991
  • The purpose of this study is to research the actual conditions of industrial accident patients and to produce worker satisfaction and a rational and effective counter measure pain. Direct interviews with 179 cases (in and out patients) were carried out during a three month period from April to July 1990, at six hospitals two general hospitals Sun Lin and Sung Mo in Po Hang, and four general hospitals in Taegu Kyung Pook University Hospital, Dong San Medical Center, Young Nam Medical Center and Catholic Hospital. The results of this study are summarized as follows: 1. Among the 179 cases, 51.6 % were male and 48.4 % were female. The two largest age groups were 30~39, 31.8 % and 20~29, 27.4 %. Among the 179 cases, 51.6% were married, the largest family number was 2 to 3, 41.1% and 4 to 5, 25.6%. Educationally, graduation from high school was the largest group, 46.4% among the patients, followed by middle school and primary school. The largest group income level was from 40~69만원, 45.2%. The largest group of patients who worked over 50 hrs. a week was 52.0%. The largest group of patients who worked less than 1 year was 44.7%, of the patients in work places of less than 100 people, 60.3% were injured and in work places of 100~299 people, 20.1% were injured. In manufacturing, the lagest group injured was 55.3%, the next group was transport, stroage, communication. The largest group of production workers injured was 40.2%. 2. The cause of injury in the largest group was facility problems, 33.5%. The next group was unsafe habits, 30.2% a lack of safety knowledge, 17.9% and insufficient supervision, 12.3%. The 30~39 year age group was head the highest number of injuries, 40.4% work places with more than 10 yeras of work, 44.4% work palces with more than 1000 people, 56.3% and mining accidents, 80.0%. Among these groups the highest cause of injury was due to facility problems. 3. The accident pattern showed machinery injuries 28.5% as the largest group, followed by falls & falling objects 17.3%, fire & electric 15.1%, struke by an object 14.5%, followed by overaction and vehicular accidents. The accident pattern showed 46.4 % among workers over the 50 year age group, workers in the 5~10 year group, 50.0 % places employing more than 1000 workers, 35.3 % : construction 73.7%, and construction workers 57.1%, among these fall & falling objects caused the greatest number of injuries. 4. The largest group of injuries was fractures 54.8%, trauma 14.5%, amputation 11.7%, open wound, and burns. The largest number of fractures occurred in people in the 30~39 year age group, 63.2 % over 10 years of work, 55.6% in work places of 300~400 people, 63.6% construction 63.2% and general workers 57.2 %. 5. The largest group of injuries was upper extremity 45.3%, lower extremity 24.0%, trunk 18.5 % and head or neck 12.2%. Of these groups, upper extremity injuries were the highest in those less 20 years old 75.0%, less than 1 years of work 59.5%, in work places of 500~999 people 60.0%, manufacturing 56.6 % and production workers 55.6%. 6. Periods of injury showed 34 people injured in September, to be the largest followed by October, 32 August, 22 people July, 19 people and the lowest December, 2 people. During the week, Friday had the largest group injured, 35 people followed by Saturday, 26 people and the lowest was Wednesday, 17 people, During the day 1400 hours had the largest group injured, 38 people followed by 800 hours, 31 people. 7. On a basis of 5 as the highest mark, the average, according to worker satisfaction showed facility safety 3.55, work environment 3.47, income 3.44, job 3.21 and treatment 2.98. 8. The correlation between general characteristics and injury showed that age was directly correlated to the duration of work(r=.2591) p<0.01, age was directly correlated to industry (r=2311) p<0.01, and the duration was directly correlated to occupation(r =.4372) p<0.001.

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A Study on Effective Plans for Increasing Urban Parks through an Analysis of Areas with Park Shortages - Gangneung - (공원부족구역 분석을 통한 도시공원 확충방안 연구 - 강릉시를 대상으로 -)

  • Lee, Jae-Young;Kim, Tae-Kyung
    • Journal of the Korean Institute of Landscape Architecture
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    • v.39 no.3
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    • pp.1-9
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    • 2011
  • The purpose of this study is to propose plans to increase the number of urban parks as a way to help absorb carbon in order to implement the low carbon green city goals of Gangneung. As a study method, park incentive areas and current park areas were set as parameters and the areas of lacking in park space were categorized according to each indicator. The degree of park shortage was classified by overlapping the park shortage areas. Once the areas needing parks were assessed according to priority, target sites were selected on sites where construction would be actually possible. First, results of analysis showed that Songjeong-Dong and Seongdeok-Dong to the east of the target site lacking park space due to old residences and high population density or industrial use areas, were the most severe in the degree of park shortage. It was also shown that areas with high population density and park shortages included the Ponam-Dong, Okcheon-Dong and Hongje-Dong areas. Accordingly, the east side of the target areas and Hongje-Dong were both considered as high-priority areas needing to increase park space and actual possible target sites were selected for the creation of new, small parks in industrial areas by creating parks in school yards, in facility relocation sites and legal reviews. In addition, analysis indicators of park shortages were re-evaluated according to the securing of the park and it was shown that the problems in park shortages were resolved with the proper positioning of parks. In addition, satisfaction in the area of park per person, $3m^2$ was at a higher than a certain level in all areas except Songjeong-Dong, demonstrating that the park areas were evenly distributed. Areas of park shortage were shown in part of Songjeong-Dong and Seongdeok-Dong. This could be resolved by using alternative park resources such as the adjacent Gyeongpo Provincial Park, the beach and Namdaecheon.

A Study on Enrollment Satisfaction, Career Directions, and Image of Dental Hygienists for Dental Hygiene Students in Some Regions (일부지역 치위생(학)과 학생들의 진학만족도와 진로방향, 치과위생사 이미지에 관한 연구)

  • Moon, Seon-Jeong;Ku, In-Young;Choi, Hwa-Young;Ka, Kyung-Hwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.1
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    • pp.564-575
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    • 2015
  • A self-administered survey was conducted in dental hygiene students at colleges or universities in Daegu and North Gyeongsang Province to provide basic data necessary to suggest standards for the direction of career for dental hygiene students and construct desirable image of dental hygienists. The data were collected from February to May 2013; with the exception of 46 questionnaires containing insincere responses, 1,679 were finally analyzed using SPSS/Win 18.0, drawing the following conclusion: The freshmen showed higher levels of regret for selection and enrollment recommendation than the sophomores, juniors, or seniors and the sophomores, juniors, and seniors showed higher levels of willingness to change courses than the freshmen; thus, those in lower grades showed higher environment satisfaction. As for desired career, regardless of grades, they showed higher preference for being employed as a dental hygienist; as for desired paths to get a job, the freshmen were more likely to get professors' recommendations and the sophomores, juniors, and seniors showed higher preference for open recruitment. They showed higher preference for getting a job in a large city because of greater possibility of improvement. As for the desired period of employment, regardless of grades, they showed higher preference for employment before getting married and for reemployment after their children grew up; as for desired workplace, the freshmen showed higher preference for a dental clinic in a hospital, whereas the sophomores, juniors, and seniors showed higher preference for a dental hospital. As for the differences in image of dental hygienists by grades, the freshmen and sophomores showed higher levels of attitudes than the juniors; the freshmen and sophomores showed higher levels of beliefs than the juniors or seniors; and the seniors showed higher levels of values than the freshmen, sophomores, or juniors, and the sophomores and juniors showed higher levels of values than the freshmen; thus, students in lower grades showed higher levels of attitudes and beliefs and those in higher grades showed higher levels of values. Such factors of enrollment satisfaction as willingness to change courses and persuasion to make enrollment had significant effects on image of dental hygienists. Dental hygiene students need to make efforts to establish a job identity and get desirable image of dental hygienists and to make constant efforts to promote more accurate and positive image of dental hygienists through systematic and positive public relations.

Development of Method for Possibility Assessment on Organic Resources for Using Raw Material of Compost (유기성자원의 퇴비원료로 활용 가능성 평가방법 개발)

  • Lim, Dong-Kyu;Lee, Seung-Hwan;Seong, Ki-Seog;So, Kyu-Ho;Shin, Jung-Du;Lee, Jeong-Taek
    • Korean Journal of Environmental Agriculture
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    • v.25 no.1
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    • pp.77-84
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    • 2006
  • This study was conducted to find a system for screening organic resources with 16 species, 62 samples which were selected to randomizing point from city, province and industrial areas in the whole country. Content of organic matters were $65.3%{\sim}98.0%$ in all samples so that they were largely over than 60%, raw material regulation of compost. Concentrations of total nitrogen and total phosphorus were $0.7{\sim}4.8%\;and\;0.8{\sim}5.0$, they could look for effect of the nitrogen and phosphorus supply as a raw material of compost. In case of 8 elements concentrations of heavy metal, they were too high to use as raw materials of compost which were over to regulation limit in Cu, Cr, Ni, and As from fiber industry, Ni from food company and leather industry, and the others are adapt to limit levels. HEM contents fro the highest to $113mg\;kg^{-1}$ from liber industry and PAHs content were the highest to $3,462ug\;kg^{-1}$ from paper-mill manufacture. Distribution of PAHs concentiations were naphthalene>phenanthrene>pyrene>fluoroanthene>acenaphthene. $Microtox{(R)}\;EC_{50}$ values for bioassay were pharmaceutical company>paper-mill manufacture>industrial area sewage sludge>fiber industry>urban sewage sludge>metropolitan sewage sludge. HEM between Zn, Cu, and Ni was significant at the 99% and between Cd was significant at the 95%, Microtox between Hg and BEM significant at the 95%.

A study on the infant daycare center teacher practicing infant's rights respect in care giving daycare center's daily work (어린이집의 하루일과에서 영아반 보육교사가 실행하는 영아권리존중보육에 관한 연구)

  • Youn, Jin-Ju
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.6
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    • pp.407-417
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    • 2017
  • This study examined the extent to which childcare methods of infant classroom childcare teachers who respect infant rights in the everyday teaching curriculum at day-care centers occurs. To achieve these objectives, a questionnaire survey was conducted on 210 infant classroom childcare teachers who were in charge of the day-care center classrooms located in [G] city of [J] province. The results of the research confirmed that first there were no statistically significant differences when verifying the extent to which childcare methods of infant classroom childcare teachers who respect infant rights in the everyday teaching curriculum at day-care centers according to the final education level, professional experience, age, and education major of the infant classroom childcare teacher. On the other hand, the results confirmed that when analyzing for arrival time for infant classroom childcare instruction at the day-care center and for the time spent taking the infant to and from the bathroom, the infant classroom childcare teachers who had graduated from 2 year colleges showed more respect for infant rights compared to that of infant classroom childcare teachers who had graduated from 4 year universities, and for the arrival time for infant classroom childcare instruction at the day-care center and nap times, the infant classroom childcare teachers who were above 50 years of age showed more respect for infant rights compared to that of infant classroom childcare teachers who were in their 30s and 40s. The results of the research confirmed that there were statistically significant differences for both the age and education major of the infant classroom childcare teachers. When examining each of the sub-factor, the age of the infant classroom childcare teachers, respect for the infant's opinion, respect for individuality, and for information provision, infant classroom childcare teachers older than 50 years of age were shown to exercise a higher level of respect for the infant according to the rule of prioritizing the infant compared to infant classroom childcare teachers in their 30s and 40s, and infant classroom childcare teachers who majored in infant education-related majors exercised a higher level of respect for the infant for respecting freedom and autonomy compared to that of infant classroom childcare teachers who majored in welfare and childcare-related fields. The results of the research confirmed a statistically significant static correlation between the two related variables. Therefore, this suggests that the more childcare methods of infant classroom childcare teachers who respect infant rights in the everyday teaching curriculum at day-care centers, the more childcare methods of infant classroom childcare teachers who respect infant rights occurred according to the rule of prioritizing the infant. These results can be used to establish both quantitatively and qualitatively an excellent and balanced respect for infant rights.

Study on characteristics of specific hazardous substances in the industrial wastewater effluent (사업장 방류수 중 특정수질유해물질 배출 특성 연구)

  • Kim, Seungho;Choi, Youngseop;Kim, Yunhee;Kim, Jongmin;Chang, Gilsik;Bae, Seokjin;Cho, Younggwan
    • Analytical Science and Technology
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    • v.29 no.3
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    • pp.114-125
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    • 2016
  • In this study, 165 wastewater discharge facilities in 10 business types were investigated with regard to 24 specific hazardous substances that included heavy metals, VOCs, CN, and phenol in the Gwangju city. Cu in the range from from 0.008 to 35.420 mg/L was detected in all business types and the detection rate was 46.8 %. Other heavy metals, such as Cd, As, Hg, Pb, and Cr+6 were detected as well. However, their detection rates ranged between 0.6 and 1.8 %. CN and phenol were detected in one and five facilities, respectively. 12 species of VOCs were detected: chloroform 80.6 % (0.42 to 81.60 μg/L), benzene 16.4 % (1.49 to 3.31 μg/L), trichloroethylene 11.5 % (1.78 to 6.02 μg/L), 1,1-dichloroethylene 10.3 % (1.23 to 5.89 μg/L), and dichloromethane 8.5 % (0.28 to 968.86 μg/L) in the detection rate order. The concentration of VOCs was detected in trace amounts, except for dichloromethane that exceeded the effluent quality standard in three business types, namely, metal manufacturing, food industry, and car washing facility. Chloroform was detected in all business types, where 24.88 μg/L were detected in the laundry business and 53.41 μg/L in the water supply business; the mean concentration of chloroform in these two business types was higher than elsewhere. Therefore, for the disposal of non-degradable specific hazardous substances in industrial wastewater, it is necessary to introduce physical and chemical processes, such as activated carbon adsorption, fenton oxidation, ozone treatment, as well as photocatalyst and the UV radiation.