• Korean Journal of Environmental Agriculture
• /
• v.28 no.2
• /
• pp.209-220
• /
• 2009

Octachlorostyrene(OCS) has been persisted in environment because it has not been decomposed easily. And, it has been known as highly toxic compounds to the environment and human as well as accumulated as high concentrations in a biota through a food chain. Therefore, OCS was monitored for water, soil and fish sampled from the areas where were able to be contaminated with OCS. The recoveries of octachlorostyrene were 93.1${\sim}$98.6% in water, 90.4${\sim}$94.8% in soil and 81.5${\sim}$90.2% in fish and detection limits were 0.0004 mg $L^{-1}$ for water, and 0.002 mg $kg^{-1}$ for soil and fish, respectively. OCS was not detected in water, sediment, soil and fish samples from Ulsan, Yeosu, Daejeon and Sihwa industrial complex and in soil sampled nearby incineration plants in all parts of the country. Accordingly, we estimated that there is no risk from exposure of OCS.

• The Journal of Engineering Geology
• /
• v.17 no.3
• /
• pp.483-494
• /
• 2007

The properties of fracture system on road-cut slopes along the Busan-Ulsan express way under construction are investigated and analyzed. Fracture spacing distributions show log-normal form with extension fractures and negative exponential form with shear fractures. Straight line segments in log-log plots of cumulative fracture length indicate a power-law scaling with exponents of -1.13 in site 1, -1.01 in site 2 and -1.52 in site 3. It is likely that the stability and strength of rock mass are the lowest in site 1 as judged from the analyses of spacing, density and inter-section of fractures in three sites. In contrast, the highest efficiency of the fracture network for conducting fluid flow is seen in site 3 where the largest cluster occupies 73% through the window map. Based on the field survey data, this study modified weighting values of the RMR system using a multiple regression analysis method. The analysis result suggests a modified weighting values of the RMR parameters as follows; 18 for the intact strength of rock; 61 for RQD; 2 for spacing of discontinuities; 2 for the condition of discontinuities; and 17 for ground water.

• Journal of Gifted/Talented Education
• /
• v.21 no.2
• /
• pp.337-356
• /
• 2011

The purpose of this study was to find out the effect of the Astronomical Learning Program Using IIM on Science Process Skills and Scientific Attitudes in the elementary scientific gifted students. For this purpose, this research developed the Astronomical Learning Program Using IIM. This program was totally consisted 7 lessen. There was 7 part in this program. It contained Select the subject (step 1), The aim settings (step 2), Collect the data (step 3), Doing inquiry (step 4), An aim evaluation (step 5), Making a report (step 6), Announcing (step 7). To find the effect of the Astronomical Learning Program Using IIM on Science Process Skills and Scientific Attitudes in the elementary scientific gifted students. 20 participants was selected. These students were attended at a scientific gifted class(3rd grade) of an elementary school located in Ulsan. First, Science Process Skills test and Scientific Attitudes test was used to find the effect of the Astronomical Learning Program Using IIM. And the results were analyzed by SPSS WIN 18.0. The results of this study were as follows. First, the Astronomical Learning Program Using IIM was a positive effects on Science Process Skills of elementary scientific gifted students (F=4.920, p=.021). Second, the Astronomical Learning Program Using IIM was a positive effects on Scientific Attitudes of the elementary scientific gifted students (F=11.244, p=.001). According to this research, the Astronomical Learning program Using IIM was verified to improve Science Process Skills and Scientific Attitudes on the elementary scientific gifted students. It will be contribute on the curriculum construction of the gifted school or gifted class.

• Journal of Korea Society of Industrial Information Systems
• /
• v.23 no.5
• /
• pp.77-87
• /
• 2018

The Purpose of This study is amid competition, High-quality human resources in food service industry make a lot of efforts. Especially, Work and Life Balance(WLB) is a considerable factor when modern workers decide and maintain the workplace and also it could be supposed as one strategic method that corporations could attract and maintain talented people. This study built a exploratory model that there is causal relationship of WLB(work and life balance) to employee's organizational commitment. Additionally this study examine the Moderating Effect of perceived value of work between WLB(work and life balance) and organizational commitment. This study utilized total 217 responses from workers of food service industrial employees and as analysis methods, it used descriptive statistic analysis, correlation analysis, multiple regression analysis, and hierarchical analysis. Results of analysis are as follows. First this study found that the work-life balance could give significant effects to the organizational commitment. work-growth balance and work-leisure balance has positive significance effect with the organizational commitment but work-family balance was not statistically significant. Second, The significance of this study indicates that perceived value of work plays a role as moderating variable influencing the relationship between work and growth balance and employee organizational commitment. Lastly, this study suggested the implication of the result, the limitation and the direction of future study. The results of this study provide suggestion to the company.

• Journal of the Economic Geographical Society of Korea
• /
• v.23 no.1
• /
• pp.1-17
• /
• 2020

The study aims to identify economic interdependencies between regions and define functional economic areas of Korea by analyzing inter-firm transaction networks. Previous research has relied on pre-given administrative boundaries or cultural homogeneity and used data such as commuting, population movement, and cargo flows which could not fully explain economic activities. To overcome the limitations, this study applies a community detection method to inter-firm transaction networks derived from the CRETOP+ database of Korean corporate data. The novel dataset and the network analysis enables us to identify Korea's functional economic areas based on actual inter-firm linkages. The result shows that there are six to seven economic blocs in the networks as of 2018. In particular, one huge economic bloc is formed integrating the Seoul metropolitan area, Chungcheong, and Gangwon provinces. Meanwhile, North Jeolla and South Jeolla provinces form two economic blocs separately rather than being tied up in one bloc due to the low frequency of transactions between each other. The two big economic blocs of Daegu-Gyeongbuk and Busan-Gyeongnam exist, and interestingly, Ulsan, Gyeongju, and Pohang form a separate middle-sized bloc across the administrative boundaries. The results reveal that the future balanced national development policies should be implemented based on functional economic areas derived from empirical data.

• The Korean Journal of Mycology
• /
• v.3 no.1
• /
• pp.21-25
• /
• 1975

This is a study to determine the content of the mercury compound and the distribution of microorganisms in the waste waters flowing from the chemical plants in the Ulsan area (at 4 stations). The summary of the result of this study is as follows: 1. The content of the mercury compound has ranged from non-detection to 0.075 ppm with an average of 0.03 ppm. The highest content has been detected from the water at station A. 2. As for the distribution of the microorganisms, one species each of bacteria, Mucor, Aspergillus, Cladosporium, and Trichothecium (T. roseum); 4 species of Penicillium; and 3 species of Sterile hyphae; a total of 12 species have been isolated. 3. The following results have been found with regard to the growth of these microorganisms in terms of the content of the mercury compound. In the case of an inorganic mercury compound, most of the microbes can grow in water with a content of up to 10 ppm. Pe. sp No. 1 particularly can grow even in 50 ppm. In the case of an organic mercury compound, the growth of the microbes seems to be somewhat restrained even in 2 ppm.

• The Journal of the Petrological Society of Korea
• /
• v.11 no.1
• /
• pp.30-48
• /
• 2002

Phenocrysts with rapakivi texture are easily observed in Bangeojin granite. The rapakivi texture is composed of inner pinkish alkali feldspars and white-colored mantling plagioclase. The Bangeojin granite distinctively includes lots of mafic microgranular enclaves and can be divided into five rock facies: (1) enclave-poor granite (EPG); (2) enclave-rich granite (ERG); (3) mafic microgranular enclave (MME); (4) hybrid zone between mafic microgranular enclave and granite (HZ); (5) hybrid zone-like enclaves (HLE). The rapakivi textures are observed in these five rock facies with no difference in shape and size. Plagioclase mantle commonly shows dendritic texture that is an important indicator to know the rapakivi genesis. The mantling texture would indicate supercooling condition during magma solidification process. In addition, mafic microgranular enclaves would imply the magma mingling environment. The magma mixing process had possibly caused the mantling texture. An abundance of rapakivi phenocrysts in HZ and the influxing phenomenon of the phenocrysts into MME support that there were physical chemical exchanges during the mingling. And this model of the magma mixing/mingling explain well the heterogeneous distribution of the rapakivi phenocrysts in the five rock facies. Therefore the rapakivi textures in the Bangeojin granite would have been formed by magma mixing process.

• Bulletin of the Society of Naval Architects of Korea
• /
• v.26 no.1
• /
• pp.46-62
• /
• 1989

This paper presents the results of full-scale structural measurements of 4,800 unit pure car carriers "HYUNDAI NO.103" and "HYUNDAI NO.105" on one voyage respectively for each ship, especially in order to investigate the local strength of partial bulkhead above free-board deck. With the measured data, the short-term frequency analyses have been performed. The results show that the wave-induced stresses follow, on the whole, well the Rayleigh distribution. In addition, it has been found from the measured data that transverse local stresses at bulkhead section have a very close relation with the acceleration in athwartship direction. Finally, the long-term analysis has been attempted by using the following two statistical distributions mainly in order to estimate the maximum stress amplitude at the corners of partial bulkhead. 1) Exponential distribution of cycles of stress amplitude 2) Double exponential distribution of extreme values of stress amplitude for each short-term analysis The results of these two cases show a good agreement with each other. For example, the estimated maximum stress amplitude for 10 years at port-side corner of Fr. 132 partial bulkhead is $2125kg/cm^2$ for the first case and $2170kg/cm^2$ for the second case just based on the measured data.

• Journal of Service Research and Studies
• /
• v.7 no.4
• /
• pp.39-50
• /
• 2017

As a comparative study on the value of design concept between service provider (Developer) and service receiver (Customer) group, the aims of this study was to present a service model focused on Continuous positive airway pressure (CPAP) based on U-health care and user environment. Double Diamond-based methods led to a case study that conducted jointly by the department of otolaryngology in U hospital, Ulsan. By targeted on Sleep Apnea patients from the stage of diagnosis to CPAP treatment, variety of meaningful experiences have been extracted and classified into several types of customers. In the final analysis of the 13 service scenario models, Kano Satisfaction and Potential Customer Satisfaction Improvement Index (PCSI) were conducted with the customers, yet Score Model and Concept Position were evaluated by the service provider groups who engaged in development services. The results of this study showed that 7 items in the total of 12 items reached a consensus of viewpoint on value between service receiver and service provider, which the attributes of the service model are based on user environment. Whereas the other 5 items showed the divergent viewpoint on value which included the attributes of U-healthcare service model.

• Journal of dental hygiene science
• /
• v.13 no.3
• /
• pp.339-346
• /
• 2013

This study conducted questionnaire survey with 268 workers in Ulsan city to examine influencing factors about Oral behavior and Missing teeth of some workers. The collected data were analyzed using SPSS 12.0 program. The analysis results are as follows. 1. Oral health awareness was highest in thirties (p<0.01). For oral health sensitivity, female was higher than male (p<0.01). The lower the age was (p<0.05) and the higher the academic background was, there was statistically significant difference (p<0.01). 2. The lower the age was (p<0.001) and the higher the academic background was, the number of daily tooth brushing was more (p<0.001) and there was statistically significant difference. 3. The more the number of daily tooth brushing was, portion of Missing teeth was low (p<0.01). When oral hygiene devices such as interdental brush, dental floss etc. were used, portion of Missing teeth was low (p<0.01). When dental visit for prevention was made, portion of Missing teeth was low (p<0.05). In case of periodontal disease, portion of Missing teeth was high so that there was statistically significant difference (p<0.01). 4. There was positive relationship according to oral health awareness and oral health sensitivity, oral health status. The oral health status and Missing teeth had a negative effect relationship. Relationship between number of Tooth brushing and Missing teeth showed negative one. In summary, oral health education is needed to increase the motivation of industrial workers to control their basic dental disease.