The purpose of this study is to investigate the ELF-MF emissions from UCLs and to compare the ELF-MF emission levels of HVTLs and UCLs. In addition, this study proposes a method and management plan to investigate the effects of exposure to ELF-MF emissions from UCLs. The ELF-MF emissions from the 154 kV UCL were 15.4±24.4 (GM: 7.8)mG, while from the 345 kV line they were 6.0±2.4 (GM: 5.7)mG. Through the comparison between ELF-MF emissions of 154 kV UCL and HVTL, at about 20 m distance from an overhead line the emissions level is 4 mG, while from an underground line at about 10 m distance the emission level was recorded as less than 4 mG. Through comparing the ELF-MF emission amount of the UCL according to the burial method, it was found that the direct ELF-MF emission levels are 15.3±7.4 (GM: 13.9)mG at the direct point, in the conduit type 21.0±30.4 (GM: 10.8)mG, and in the buried form 8.5±12.3 (GM:5.1)mG. In this study, ELF-MF emissions were about 37.0% and 47.5% lower, respectively, compared with the direct power and conduit type. The correlation between ELF-MF emission (mG) and power load (A) was analyzed. The higher the power load, the higher the ELF-MF emission. The correlation between ELF-MF emission at the direct point and depth of the UCL was also analyzed, and it was found that as the depth of line burial increased, ELF-MF emissions decreased.

The objective of this study was to determine whether crops and fruits absorb the naturally occurring asbestos (NOA). The concentration of asbestos in various crops and fruits grown in NOA areas was analyzed and background levels of asbestos in ambient air and soil samples were assessed. Actinolite/Tremolite asbestos were detected in all soil samples. Among 21 ambient air samples, 2 samples were recorded to contain 0.0005 f/cc (fiber per cubic centimeter) but no asbestos was detected in the other samples using transmission electron microscopy (TEM). However, no evidence suggesting that the crops and fruits could be contaminated by NOA was found in this study. The excess lifetime cancer risks (ELCRs) of ABS scenarios (agricultural activities) used in this study were calculated by using the Arithmetic (AM) and Geometric mean (GM) of ELCRs. The AM and GM of ELCRs estimated from digging soil and weeding activities did not exceed 1 × 10−4, which was defined as the general acceptable risk range for exposure. The results of this study would be informative to NOA managers and related policy makers to make plans to prevent unexpected exposure to asbestos to residents living in an NOA area.

This study investigated Extremely Low Frequency-Magnetic Fields (ELF-MF) exposure levels among housewives for a 24-Hour activity pattern to identify related factors for the exposures. To achieve the objective of the study, we surveyed ELF-MF levels using EMDEX II in a living environment from January to December 2016. We also made subjects write a Daily Activity Pattern in order to identify durations for staying and related information in the environment of exposures. Subjects showed that they spent the longest time in sleep and at home, at 487.5 minutes (KOSIS: 479.0 minutes) and 472.1 minutes (KOSIS: 428.0 minutes), respectively. Furthermore, the 24- hour time-weighted average (TWA) of 54 housewives was 1.24 ± 3.48 mG (GM: 0.52 mG). The ELF-MF exposure levels for all Multiuse Facilities were far below the recommended standards of EMF Guideline Korea and ICNIRP. Thus, these results will provide useful data for the determination of ELF-MF management and reduction methods in living environments.

An elementary school is a significant facility for educating and cultivating children and it is where they spend most of their days. The purpose of this study is to conduct an analysis on PM10 and TBC concentrations in 110 elementary schools in Suwon. We investigated 110 elementary schools from March 2011 to December in 2012. The mean concentration of PM10 and TBC were 51.3 ± 18.0 μg/m3(GM: 47.9 μg/m3) and 311.0 ± 125.3 CFU/m3 (GM:293.3 CFU/m3), respectively. All measurement concentrations did not exceed the Ministry of Education IAQ guidelines. Also, the concentrations of PM10 and TBC were not affected by various conditions such as Outdoor PM10, school construction year, class student number, temperature(oC) and humidity(%). The results of the study suggest that management of the IAQ plan in elementary schools should be implemented through Daily-Pattern and Activity-Pattern analysis for assessment of IAQ.

Asbestos was a general term applied to certain fibrous minerals long popular for their heat-resistance, tensile strength, acoustic insulation and inexpensive price. Despite its many uses, asbestos is a hazardous material. Inhalation of asbestos fibers can cause serious health problems, such as lung cancer, asbestosis and mesothelioma. According to the compliance regulations for asbestos-related materials in Korea, all kindergartens have to be inspected for asbestos materials before April 2014. The purpose of this study is to investigate the distribution of asbestos containing materials in kindergartens in Gwangju, Korea. We investigated 93 kindergartens between January and May in 2014. Asbestos types and contents were analysed using the polarized light microscopy (PLM). Kindergartens facilities that featured ACM(Asbestos Containing Material) included ceiling textiles that contained chrysolite/amosite in amounts between 2 and 5% and gaskets that contained chrysolite in amounts between 15 and 35%. Also, wall cement flat boards contained chrysolite in amounts between 10 and 15%. In this study, risk assessment of asbestos material showed that all kindergarten materials were classified as Low grade when assessed by the Korea Ministry of Employment and Labor guideline method.

This study is to consider the introduction of the standard practice which test the asbestos stabilizer efficiency for the spray-applied ACBM, because asbestos stabilizer may be one of operation & management (O&M) program to prevent friable asbestos from spray-applied asbestos containing building materials( ACBM) and some countries like U.S and Japan have introduced the evaluation system or standard practice to test the efficiency of asbestos stabilizer which is used for spray-applied ACBM since 2002 and 2006, relatively. Efficiency test of 8 stabilizers which were manufactured from Japan, Australia and Korea was performed by the method of the Ministry of Land, Infrastructure, Transport and Tourism of Japan. The contents of test method were consisted adhesive strength, penetration depth, impact resistance and wind affection. The efficiency of impact resistance and wind affection was improved 4.1～37.4% and 75.2～95.7% after asbestos stabilizer applied on the spray-applied ACBM. Although the results of adhesive strength were less than that of non-applied materials but that was satisfied the ASTM standard (2.4kPa).

이 연구의 목적은 한국인 영어 학습자가 자주 만들어 내는 분절음의 오류가 한국인 영어교사의 이해 가능성과 이해도에 미치는 영향을 탐구하고 그 과정에서 드러나는 교사 인식의 역할을 알아보는 데 있다. 유의미한 평균 차이가 나타나는 음소를 구체화하기 위해서 분절음의 오류를 음소 부담량과 자·모음으로 구분하였다. 영어 원어민의 이해 가능성과 이해도 점수를 비교 데이터로 수집하였다. 이해 가능성 과제에서 오류 분절음이 모음일 때 음소 부담량이 높은 음소는 한국인 교사에게만 통계적으로 유의미한 부정적인 영향을 미쳤다. 교사와 화자가 같은 모국어를 공유함에도 해당 음소의 오류를 이해하는데 특별한 이점이 없었음을 나타낸다. 그러나 이해도 과제에서는 해당 분절음 오류에 관한 유의미한 점수 차이가 없었다. 이는 한국인 교사가 실제로 높은 음소 부담량의 모음 오류가 포함된 단어를 이해하는 데 어려움을 겪었음에도 불구하고 이를 편하게 이해하였다고 잘못된 판단을 내렸음을 보여준다. 또한, 세계 영어를 교실에 수용하고자하는 교사의 태도와 관련하여서 유의미한 평균차이가 발견되었다. 낮은 수용도를 가진 교사들이 높은 음소 부담량을 가진 모음의 오류에 대해 더 낮은 이해도 점수를 부여하였다. 해당 오류에 대한 교사의 낮은 이해가능성 점수를 고려하면, 현 실험 상황에서 낮은 수용도의 교사의 이해도 점수 부여가 좀 더 합당한 것으로 보인다.

Hyunsong Chung. 2017. A Diagnostic Review of English Pronunciation Teaching Based on the Analysis of the 2015 Revised English Curriculum and English Textbooks. Studies in Modern Grammar 96, 191-212. In this paper, we discuss the goal of English pronunciation teaching in Korea and how to elaborate the elements of English pronunciation teaching in the national curriculum based on the analysis of the 2015 revised English language curriculum and English textbooks. We suggest that the elements of English pronunciation teaching should be explicitly and properly specified for all the levels in the curriculum including primary and secondary levels. The activities in the classroom should combine task-based controlled practices in pronunciation with communicative activities. Phonetic symbols in the textbooks should pursue IPA conventions and be consistent. It is necessary to continue the discussions and conduct researches on pronunciation teaching in the national curriculum so that the results can be positively reflected in the future revision of the English curriculum.