• 한국지하수토양환경학회지:지하수토양환경
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• 제20권6호
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• pp.1-7
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• 2015

The most critical health effect of lead exposure is the neurodevelopmental effect to children caused by the increased blood lead level. Therefore, the endpoint of the risk assessment for lead-contaminated sites should be set at the blood lead level of children. In foreign countries, the risk assessment for lead-contaminated sites is conducted by estimating the increased blood lead level of children via oral intake and/or inhalation (United States Environmental Protection Agency, USEPA), or by comparing the estimated oral dose to the threshold oral dose of lead, which is derived from the permissible blood lead level of children (Dutch National Institute for Public Health and the Environment, RIVM). For the risk assessment, USEPA employs Integrated-Exposure-Uptake-Biokinetic (IEUBK) Model to check whether the estimated portion of children whose blood lead level exceeds 10 µg/dL, threshold blood lead level determined by USEPA, is higher than 5%, while Dutch RIVM compares the estimated oral dose of lead to the threshold oral dose (2.8 µg/kg-day), which is derived from the permissible blood lead level of children. In Korea, like The Netherlands, risk assessment for lead-contaminated sites is conducted by comparing the estimated oral dose to the threshold oral dose; however, because the threshold oral dose listed in Korean risk assessment guidance is an unidentified value, it is recommended to revise the existing threshold oral dose described in Korean risk assessment guidance. And, if significant lead exposure via inhalation is suspected, it is useful to employ IEUBK Model to derive the risk posed via multimedia exposure (i.e., both oral ingestion and inhalation).

• 대한수학교육학회지:수학교육학연구
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• 제10권2호
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• pp.161-182
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• 2000

This study is to develop assessment framework, test items and questionnaire for the National Assessment of Educational Achievement(NAEA), which administered in the elementary and secondary schools across the country in this year(2000). According to the first year study result of the NAEA, the test was administered in two core subjects, Mathematics and Social Studies. In this study, test items and sets of questionnaire and administered pretest were developed in the last year. In this year, the NAEA was administered with the adjusted test items and questionnaires and the results was analyzed and would be reported to the public. NAEA was developed on the basis of national curriculum, especially of the nature and objectives of subject curriculum in Mathematics (and also Social Studies). In the framework of assessment, we set up four differentiated levels of student achievement: 'under basic', 'basic', 'intermediary', and 'advanced'. Here 'the intermediary level' means the level of educational achievement in which students can understand average content of subject curriculum. 'Advanced level' indicates the level of educational achievement in which students master all the content of subject curriculum and apply basic concepts and principles to a variety of situations. 'The basic level' means the level of educational achievement in which students do not achieve the intermediary level. Students who do not understand average content of subject curriculum are classified as belonging to the basic level. Finally, this study would explain how to administer and analyze the test in the future. The test result was analyzed to report students' educational achievement according to regions, content areas, behavioral characteristics, and etc. This study would show how to report test result\ulcorner and how to set up students' academic achievement.

• 해양환경안전학회지
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• 제22권2호
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• pp.187-194
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• 2016

본 연구에서는 하구 염습지 생태계 복원 및 조성을 위한 기초적 연구로서, 낙동강 하구 사주섬인 진우도에 서식하는 갈대의 서식환경 특성을 파악하기 위하여 저질의 함수량, 입도분포, pH, 영양염 농도($NH_4-N$, $PO_4-P$), 지하수위, 지반고, 갈대 개체수 및 최대 높이 등의 조사를 실시하였다. 조사결과 연구대상 지역의 저질 입경 및 함수량이 갈대 서식환경에 미치는 영향은 적은 것으로 나타났으며, pH는 식생대와 비식생대 정점의 차이가 없었고, $NH_4-N$와 $PO_4-P$ 농도도 정점별 차이가 없었다. 식생대 영역에서 해안선 쪽으로 갈수록 지반고가 낮으며 개체수는 감소하였고, 지하수위는 높게 나타났다. 따라서 낙동강 하구 염습지의 갈대서식 환경에 영향을 미치는 주요인자는 지반고와 지하수위가 크게 기여하는 것으로 나타났다.

• 대한영양사협회학술지
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• 제21권4호
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• pp.280-290
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• 2015

Diet is closely related to an economic level, but few studies have reported on the relationship between the economic level and eating habits, especially in college students. Therefore, this study was conducted to clarify differences in eating habits with a focus on processed foods according to allowance level in college students. This study was a cross-sectional survey of 500 college students using a questionnaire. The questionnaire consisted of general characteristics, eating behaviors, purchase of processed foods, and preference and intake frequency of processed foods. All subjects were classified based on monthly allowance: less than \300,000 (n=149), \300,000~400,000 (n=177), and more than \400,000 (n=124). All survey results were comparatively analyzed among the spending money groups. As the level of spending money of the subjects increased, the rate of skipping meals, eating out, and unbalanced diet increased (P<0.05). The reason for consuming processed foods was because they are easy to prepare. The factor considered the most when buying processed foods was price. However, these results showed no significant difference according to level of spending money. As spending money increased preference for retort, convenience, canned, and bottled foods significantly increased. Intake frequency of dairy products was lower, and the frequency of processed foods was significantly higher with more spending money. This study found that a higher level of monthly allowance in college students, was associated with higher rate of skipping meals, eating out, and unbalanced diet, and the preference and intake frequency of processed foods were also high. These results suggest that spending money level in college students, as an economic indicator, is relevant to intake of processed foods.

• 한국식품조리과학회지
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• 제25권5호
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• pp.619-631
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• 2009

The purpose of this study was to provide basic information to school foodservice employees so that they can meet their professional responsibilities by understanding the relationship of job burnout, job engagement, job stress and level of job satisfaction and analyze the influence between these factors according to the general characteristics of the employees. The subjects included employees at 426 school foodservices in Busan. The mean job engagement was significantly different in the reason that cooks chose this profession(p<0.05), and readiness to quit(p<0.001). The mean job stress was significantly different in different age groups(p<0.01), cooking certification(p<0.01), reason that cooks chose this profession(p<0.01), and readiness to quit(p<0.05). The mean job stress was significantly different in the reason cooks chose this profession(p<0.01), and readiness to quit(p<0.05). In terms of the level of satisfaction of coworkers, the subfactor of job burnout, 'self-confidence' and 'achievement' had positive influences (p<0.01) and for the level of satisfaction of the work, it had positive influences on 'achievement'(p<0.01) and negative influences on 'exhaustion' (p<0.01). In terms of the level of satisfaction of co-workers and work, the subfactor of job engagement, 'absorption' had positive influences(p<0.01). Among the level of job satisfaction, for the level of satisfaction of pay, the subfactor of job stress, 'unstable job' had negative influences(p<0.01) and 'role conflict' had positive influences(p<0.05). For the level of satisfaction of co-workers, the subfactor of job stress, 'role conflict' had negative influences(p<0.01), and for the level of satisfaction of work, 'inappropriate circumstance' and 'unstable job' had negative influences (p<0.01).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권2호
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• pp.186-190
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• 2000

Purpose : The purpose of this study is to observe the salivary immunoglobulin level in whole saliva of infected patients and also to investigate the changes of immunoglobulin level according to its management. Materials & Methods : Thirty infected patients who have been admitted to the dept. of oral and maxillofacial surgery of Pusan National University Hospital have been selected as subjects and we analysed the changes of immunoglobulin level of $1.5{\sim}3.0ml$ of unstimulated whole saliva collected throughout four times; the day before treatment, the first day after treatment, the third day after treatment and the day before discharge. We also compared them with immunoglobulins in whole saliva that was collected from 4 normal persons as control group. In radial immunodiffusion technique with BACKMAN(Array 360 system, McLean, USA), level of immunoglobulins was analyzed. Results : The isotypes of Ig that have been found in saliva of normal persons were IgG, IgA, IgM and IgE and their mean level was 8.23, 36.41, 4.38, and 2.38 respectively. In the infected patients before the treatment, the level of IgG, IgA was remarkably higher than that of normal persons, however we could not find the difference on the level of IgM, IgE. As the infection was healing, the level of IgG, IgA was decresing significantly.

• Journal of Life Science
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• 제11권2호
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• pp.135-139
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• 2001

The goal of this study was to find out the effective diet prescription for the exercises. To accomplish this purpose, we investigated the effect of free-fatty acid diet (FFAD) on two groups of the K technical high school soccer players; one group with 7 members for normal diet (NORD) and another group with 7 members for high-fat diet (HFD). HFD group was fed far three days before the game. Results were as follows: i) Blood glucose level was increased with statistical significance in HFD group (P<.01) compared to the NORD group. After plying game, the glucose level was increased in the both groups ii) The contents of free-fatty acid (FFA) was significantly increased in HFD group (P<.0001) compared to the NORD group. After playing game, the FFA level was also increased in both groups iii) The levels of T-C, HDL-C and LDL-C were slightly increased in both NORD and HFD groups after playing game, while the TG level was slightly decreased. However, the differences were not significant. These results imply that HFD may not affect the level of seam lipids. Overall, the level of glucose and FFA were increased, but other types of lpids were not changed. From these studies, we observed the increase in the level of glucose and FFA but not other sew lipid. These results indicate that HFD may induce the body energy-utilizing system during long-lasting exercise such as playing soccer game.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제5권1호
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• pp.21-39
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• 2001

This study is to develop assessment framework, test items and questionnaire for the National Assessment of Educational Achievement(NAEA), which administered in the elementary and secondary schools across the country in this year(2000). According to the first year study result of the NAEA, the test was administered in two core subjects, Mathematics and Social Studies. In this study, test items and sets of questionnaire and administered pretest were developed in the last year. In this year, the NAEA was administered with the adjusted test items and questionnaires and the results was analyzed and would be reported to the public. NAEA was developed on the basis of national curriculum, especially of the nature and objectives of subject curriculum in Mathematics (and also Social Studies). In the framework of assessment, we set up four differentiated levels of student achievement:‘under basic’,‘basic’,‘intermediary’, and ‘advanced’. Here ‘the intermediary level’means the level of educational achievement in which students can understand average content of subject curriculum. ‘Advanced level ’indicates the level of educational achievement in which students master all the content of subject curriculum and apply basic concepts and principles to a variety of situations. ‘The basic level’means the level of educational achievement in which students do not achieve the intermediary level. Students who do not understand average content of subject curriculum are classified as belonging to the basic level. Finally, this study would explain how to administer and analyze the test int he future. The test result was analyzed to report students’s educational achievement according to regions, content area, behavioral characteristics, and etc. This study would show how to report test results and how to set up student’s academic achievement.

• Safety and Health at Work
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• 제11권2호
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• pp.228-234
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• 2020

Background: The concept of social capital has its focus on cooperative relations in the workplace. This study investigates the association between social capital and sickness absence among workers in 41 work groups in the Danish dairy industry and examines the possible effects of an intervention on social capital in the workplace on sickness absence. Methods: A sample of 791 dairy workers working in 41 work groups that participated in an intervention study on social capital filled in a questionnaire on four subtypes of social capital, and social capital scores from individual participants were aggregated to the level of work groups. Sickness absence was measured at the level of work groups in company registers as the two-year average percentage of working time lost to sickness absence. Group-level associations between social capital and sickness absence were analyzed using multilevel linear regression analysis. Analyses were adjusted for age, gender, group size, and random effects at the workplace level. Results: We found statistically significant associations between social capital within work groups, social capital in relation to the immediate manager, and social capital toward the workplace as a whole on the one side and sickness absence on the other side. We found no support for any effects of the intervention on sickness absence. Conclusion: The work group level of social capital is associated with the work group level of sickness absence. However, the intervention to enhance group-level social capital had no effect on reducing sickness absence in the intervention group.

• 한국환경교육학회지:환경교육
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• 제18권1호
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• pp.82-96
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• 2005

The purpose of this study was to evaluate Korean and foreign environmental education programs: 3 Korean programs including 'Environmental Education Program' for primary school level, 'Environment' for middle school level, 'Ecology and Environment' for high school level and 2 foreign programs including 'TLSF(Teaching and Loaming for a Sustainable Future) Program and IEEIA(Investigating and Evaluating Environmental Issues and Actions) Program using IAEEC (The Inventory for Assessing Environmental Education Curricula) by Kim (2003). The IAEEC include four goal levels of the foundations level, the conceptual awareness level, the investigation level, environmental action skills level and an optical level: teaching methods and practice. The IAEEC use a 5-point Likert scale to identify the extent to which an environmental education curriculum or a program reflects the goals of environmental education. It was found that our school environmental education programs need to be more involved, especially in the areas of social foundations (political & legal); personal beliefs and values in environmental issue and the critical analysis of the issue by identifying important players' positions, beliefs, and values; and the environmental action to solve the issue and evaluate the consequences and effectiveness of the action plan. This study can provide a meaningful direction for program development in environmental education and especially provide school-teachers with reliable sources in analyzing environmental education programs for their school classes.