• Journal of Korean Society of Occupational and Environmental Hygiene
• /
• v.26 no.3
• /
• pp.317-323
• /
• 2016

Objectives: This study was performed to estimate domestic usage amount of insecticide for fruit cultivation to suggest job-exposure matrix(JEM) regarding farmers treating agricultural insecticide. Materials and Methods: The domestic usage amount of insecticide for fruit cultivation was investigated according to two research methods. The former method is to use agricultural pesticides published annually from Korea Crop Protection Association(KCPA) and the latter method is to apply cultivation area of fruit provided officially from Statistics Korea(SK). Results: It was found that its domestic usage amount has decreased gradually from the first sale to presence(2012). However, there is a significant difference of annual usage trend of insecticide for fruit cultivation between shipments and estimation. The annual usage trends of insecticide for fruit cultivation based on regional classification were different from those based on total aspect. Conclusions: The region which used insecticide for fruit cultivation the most in Korea was as follows: Gyeonsang-do, followed by Jeolla-do, Chungcheong-do, Jeju-do, Seoul/Gyeonggi-do and Gangwon-do. An averaged ratio of usage amounts of insecticide based on shipments and those based on estimation by cultivation area was $980{\pm}186%$, which means that usage amounts of insecticide estimated by shipments are ten times higher than those based on cultivation area.

• Journal of Plant Biotechnology
• /
• v.33 no.4
• /
• pp.277-281
• /
• 2006

Fourier transform - infrared spectroscopy (FT-IR) provides biochemical profiles containing overlapping signals from a majority of the compounds that are present when whole cell extracts are analyzed. We attempted to determine the ripeness of strawberry fruit flesh by FT-IR. Fruit ripeness was divided into four developmental stages based on fruit skin color: 'yellow-green', 'pink-green', 'pink', and 'red' stages. Principal component analysis of FT-IR data of inside fruit flesh extracts clustered samples of four different developmental stages into three discrete groups: (1) 'yellow-green' group, (2) 'pink-green' group, and (3) 'pink' and 'red' group. The most remarkable difference between four different developmental stages was found in the carbohydrate fingerprint region $(1,000-1,100cm^{-1})$ of the FT-IR spectrum, indicating that differences in carbohydrate compounds represented the ripeness of strawberry fruit. Overall results indicate that FT-IR in combination with PCA enables discrimination of the ripeness of strawberry fruit flesh.

• Analytical Science and Technology
• /
• v.18 no.4
• /
• pp.329-337
• /
• 2005

TL dating using pre-dose effect is concerned with the sensitivity increase of $110^{\circ}C$ TL peak in quartz following the pre-exposure of irradiation (pre-dose) in antiquity and heating to thermal activation temperature. Using the multiple activation (MA) method for determining an equivalent dose, the activation temperature was selected to $500^{\circ}C$ and the region of interest was selected from $85^{\circ}C$ to $105^{\circ}C$ on quartz sample from archaeological remains, roof-tile kiln. which was excavated at Chudong-Ri cultural site. It was concluded that the resultant date was determined to the age of $1725{\pm}25years$ AD (l ${\sigma}$ SD), which had more improved precision considering with e radiocarbon dates and was in good agreement with the age derived by archaeological assessment. Also it was concluded that the pre-dose dating should contribute significantly to future archaeological dating work in the range of the last 2000 years.

• Journal of the Korean Society of Food Culture
• /
• v.31 no.4
• /
• pp.286-299
• /
• 2016

This study analyzed trends and contents of ancestral ritual foods of Korean traditional Jong-ga as a domestic thesis. In searching the keywords related to ancestral ritual foods using a thesis search site, a total of 15 theses in seven journals were selected for analysis. Three theses from 1996 to 1999, six theses from 2005 to 2008, and another six theses from 2012 to 2016 were announced. In measuring frequency by dividing case families analyzed in the thesis into region, there were 83 families, including seven families from Gyeonggi (8.4%), seven families from Chungcheong (8.4%), two families from Honam (2.4%), and 67 families from Yeongnam (80.8%). Fifty-four families out of 67 families from Yeongnam were located in Andong-si, occupying 65.1% of the 83 families. The family showing the highest frequency was 'Seoae Jong-ga' (12 times). The family clan with the highest frequency was eight families of the 'Jinseong Lee clan' In the future, it would be necessary to understand the research flow through analysis of research trends in ancestral ritual foods of Jong-ga as well as interdisciplinary research and methodological diversification of studies on ancestral ritual foods of Jong-ga.

• Journal of Digital Convergence
• /
• v.16 no.1
• /
• pp.177-186
• /
• 2018

The purpose of this study was to examine the influence of Inter-Parental Conflict(IPC) on the Mental Health(MH) of 2nd grade high school students and verify the mediating effects of Resilience. Data collected from 730 students in Daejeon and Chungcheong region was analyzed by descriptive statistics, t-test, one-way ANOVA, hierarchical analysis and correlation analysis using SPSS 18.0. As the results, 1. a significant difference was observed in the IPC, MH, and resilience depending on the socio-demographic variable. 2. resilience showed mediating effects on the process where IPC influenced MH. The implication and limitations of the study also was suggested for MH of adolescents with follow-up study.

• 보존과학연구
• /
• s.36
• /
• pp.4-10
• /
• 2015

This paper confirms characteristics of lead isotopes of bronze artifacts excavated from Korea peninsula using 673 data classified according to Age, type and region. Lead isotopes data in Early iron ages are distributed in the southern Korean peninsula, but data in Joseon ages are concentrated in zone 3. Also Bronze artifacts excavated from Seoul, Gyeonggi, Chungcheong, Jeolla and Gyeonsang are manufactured using raw materials of the entire Korea peninsula, but bronzes excavated from North Korea aren't produced using raw materials of Gyeonsang provinces. Lead isotopes data will be able to find moving routes of raw materials and to separate the period of mixing and recycling of lead.

• Journal of the Korea Convergence Society
• /
• v.9 no.2
• /
• pp.33-42
• /
• 2018

The purpose of this study is to identify the degree of dating violence experience, violence tolerance, and social problem solving ability of nursing college students and to investigate the relationship between them. 219 college students from nursing in 5 universities of Chungcheong region were convenience selected for the study. Data were collected through self-report questionnaires. Data were analyzed by t-test, ${\chi}^2$ test and Partial correlation coefficients using the SPSS 20.0 program. As a result, nursing college student's the more experience dating violence, the higher the tolerance for dating violence(r=0.31, p<.001), the higher the tolerance of dating violence is, the more negative the ability to solve social problems(r=-0.26, p<.001), and the degree of their departmental satisfaction and drinking are related to the violence of dating violence. Therefore, it provided a rational basis for the establishment of a dating violence preventive education and training program to raise awareness of dating violence tolerance and social problem solving abilities in order to prevent dating violence.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.3 no.3
• /
• pp.244-251
• /
• 2015

The paper evaluates the effect of the physical property, fineness modulus (FM) and replacement ratio of crushed sand on the characteristics of concrete. This is intended to use crushed sand from Daegu-Kyungbuk region as the fine aggregate of concrete. The experimental result indicates that the replacement ratio of crushed sand needs to be less than 50% to satisfy the mixed gradation of both natural and crushed sand when their FMs are 2.0 and 3.2, respectively. The slump of concrete with crushed sand increased as the replacement ratio of crushed sand increased, while the workability of concrete with the replacement ratio of more than 75% was significantly reduced. The air content and bleeding rate of concrete was reduced as the replacement ratio increased. Furthermore, due to the enhancement of the concrete adhesive regardless of the FM of crushed sand, compressive strength of concrete tended to improve as the replacement ratio increased.

• Journal of dental hygiene science
• /
• v.6 no.2
• /
• pp.139-145
• /
• 2006

This study aimed to examine the factors affecting education satisfaction of dental hygiene students by conducting surveys on a total of 1,840 first, second, and third year dental hygiene students enrolled in 6 colleges in Gyeonggi-do, Chungcheong-do, and Jeolla-do, and then using SPSS WIN 12.0 to analyze the results. The following results were obtained. 1. In terms of differences in satisfaction for each year, "department satisfaction", "major satisfaction", "facility satisfaction", and "lecture satisfaction" showed statistically significant differences (p < 0.05). 2. In terms of differences in satisfaction for each region, all of the categories - "department satisfaction", "major satisfaction", "facility satisfaction", "lecture satisfaction", and "lecturer satisfaction" - showed statistically significant differences (p < 0.05). 3. In terms of differences in satisfaction for the department of dental hygiene, the following factors showed statistically significant differences: general knowledge of dental hygiene (p = .000), channel of knowledge of dental hygiene (p = .001), timeframe of making decision to study dental hygiene (p = .025), motive for choosing dental hygiene (p = .000), career path after graduation (p = .016), and number of years at work after graduation (p = .0000).

• Korean Journal of Agricultural Science
• /
• v.37 no.2
• /
• pp.223-229
• /
• 2010

This study is to analyze location conditions for erosion control dams to be constructed in Chungcheongnam-do, Daejeon Metropolitan City, Chungcheongbuk-do and Gyeongsangbuk-do in order to establish proper conditions for erosion control dams in the future. 199 sites where erosion control dams are expected to be built in 2010 were chosen and investigated in terms of 12 factors including basin area, basin slope, and landslide risk. The results showed that erosion control dams for Chungcheongnam-do and Daejeon Metropolitan City are mostly impermeable gravity dams mainly composed of concrete. In contrast, Chungcheongbuk-do and Gyeongsangbuk-do are increasing the number of permeable or compound erosion control dams. Basin analysis at planned erosion control dam sites showed that at least 44.5% of the total area has high landslide risk. Gyeongsangbuk-do had the largest basin area for erosion control dam sites at 157.3ha, followed by Chungcheongbuk-do at 64.4ha and Chungcheongnam-do at 54.8ha. Analysis of sand deposits in the Chungcheongnam-do erosion control dam built in 2010 confirmed an average deposit of 971.8m3. The sand deposit capacity and amount of sediment control for erosion control dams have a very low correlation with basin area or flow path slope, and this needs to be addressed in future sand deposit capacity designs.