• 한국환경보건학회지
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• 제27권3호
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• pp.87-98
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• 2001

There has been increased interest in the health effects of the Environmental Tobacco Smoke(ETS) as a confirmed human carcinogen. It has been known to be extremely difficult to make an accurate assessment of exposure to ETS since it is consisted of a variety of components and there are a number of labile chemicals. Therefore, it is necessary to obtain, to interpretate and to provide the data of quantitative exposure assessment to ETS in the field of environmental health. The purpose of this research is to evaluate the concentration of ETS using VOC in indoor office environments. The correlations and concentrations of benzene, RSP, 3-EP, nicotine that are indicators for ETS were investigate with smoking density, air change per hour(ventilation rate). Air samples were taken in smoking room(7 sites), smoking allowed office (3 sites), corridor outside smoking room(7 sites), non-smoking office (9 sites). The concentrations of benzene showed significant difference according to category of indoor office environments. The geometric mean concentration of benzene were 23.56 ${\mu}{\textrm}{m}$/㎥(range 4.80~192.90 ${\mu}{\textrm}{m}$/㎥) in smoking rooms. 6.16 ${\mu}{\textrm}{m}$/㎥ in smoking allowed offices, 1.32 ${\mu}{\textrm}{m}$/㎥ in the non-smoking offices respectively. The ratios of the concentration of benzene between outdoor air and smoking room, smoking allowed office, and non-smoking indicators concentrations, SD, and SI were 0.82(benzene and nicotine). 0.76(benzene and RSP), 0.60(benzene and SD), 0.76(benzene and SI). It is proposed that benzene is a good indicator for ETS.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2004년도 한국우주과학회보 제13권2호
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• pp.372-375
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• 2004

The UV radiometer payload was launched successfully from the west coastal area of Korea Peninsula aboard KSR-III on 28, Nov 2002. KSR-III was the Korean third generation sounding rocket and was developed as intermediate step to larger space launch vehicle with liquid propulsion engine system. UV radiometer onboard KSR-III consists of UV and visible band optical phototubes to measure the direct solar attenuation during rocket ascending phase. For UV detection, 4 channel of sensors were installed in electronics payload section and each channel has 255, 290, 310nm center wavelengths, respectively. 450nm channel was used as reference for correction of the rocket attitude during the flight. Transmission characteristics of all channels were calibrated precisely prior to the flight test at the Optical Lab. in KARI (Korea Aerospace Research Institute). During a total of 231s flight time, the onboard data telemetered to the ground station in real time. The ozone column density was calculated by this telemetry raw data. From the calculated column density, the vertical ozone profile over Korea Peninsula was obtained with sensor calibration data. Our results had reasonable agreements compared with various observations such as ground Umkhr measurement at Yonsei site, ozonesonde at Pohang site, and satellite measurements of HALOE and POAM. The sensitivity analysis of retrieval algorithm for parameters was performed and it was provided that significant error sources of the retrieval algorithm.

• 정보화연구
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• 제11권2호
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• pp.175-185
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• 2014

본 연구는 정보보안 관리체계에 따라 모바일 오피스에서 위협, 취약점을 모바일 오피스 구성항목의 유형별로 분석하고 현재 기술수준에서 통제가능성을 제시하는데 그 목적이 있다. 모바일오피스라는 신기술 분야를 대상으로 탐색적 연구를 수행하기 위해 문헌조사, 전문가 FGI, 그리고 실사용자 설문조사 등의 통합적 연구 방법을 사용하였다. 모바일오피스 서비스의 주요 위험영역을 파악하기 위해 서비스 전달체계에 따라 사용자, 장소, 단말, 네트워크, 서버로 모바일오피스 서비스 계층 모형을 개발하고, 다섯 가지 계층별로 구분하고 실사용자 그룹을 대상으로 설문지법을 이용하여 위협 및 취약점을 조사한 결과 사용자와 사용자가 사용하는 단말의 통제가 중요한 것으로 나타났다.

• 한국산업보건학회지
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• 제22권2호
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• pp.128-133
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• 2012

People are exposed to air pollution from a range of indoor and outdoor sources. Concentration of nitrogen dioxide $(NO_2)$, which is hazardous to health, can be significant in both types of environment. This paper reports on the measurement and analysis of indoor and outdoor $NO_2$ concentrations and their comparison with measured personal exposure in house and workplace indoors with 28 office workers during winter and summer seasons. Time activity patterns were used to determine the effects of these factors on personal exposure. The residential indoor and office indoor times were $12.29{\pm}1.58,$ $7.86{\pm}1.97$ hours in winter and $11.04{\pm}2.18,$ $8.26{\pm}2.04$ hours in summer, respectively. Measured residential indoor, outdoor and office indoor, personal exposure $NO_2$ concentrations were $23.10{\pm}8.46$ ppb, $23.97{\pm}6.86$ ppb, $21.91{\pm}11.50$ ppb, $22.08{\pm}8.64$ ppb in winter, and $19.94{\pm}6.04$ ppb, $21.21{\pm}6.84{\pm}$ ppb, $22.55{\pm}9.54$ ppb, $27.45{\pm}8.96$ ppb in summer, respectively. Contributions of residential and office indoor $NO_2$ concentration on personal exposure were estimated by 57.98%, 35.62% in winter and 37.38%, 28.97% in summer, respectively.

• 조명전기설비학회논문지
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• 제26권8호
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• pp.8-17
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• 2012

Unlike traditional lightings, LED lighting is one of objects that sends user an emotional segments through brightness control from various color temperature and dimming control. Also, within present interior lighting environment, emotional researches about traditional fluorescent lamp and newly implemented LED lighting environment are in active progress. Despite the fact adjectives describing emotions and scale modeling have been repeatedly used in many cases for a long time, there seems to be a lack of results in reliability, and there is a limitation for applying into actual lighting design. The purpose of this study is to construct an actual sized test-bed, which is used to draw out one's emotional words of behavior patterns from inner emotional experiences about lighting environment in an office space. Also, having fluorescent lamp and LED lighting as the main test subjects, we have tested emotional parts according to the changes of color temperature and adjective vocabularies chosen from user's action, and we have compared and analyzed the drawn out data. Also, having fluorescent lamp and LED lighting as the main test subjects, we have tested emotional parts according to the changes of color temperature and adjective vocabularies chosen from user's action, and we have compared and analyzed the drawn out data.

• 환경위생공학
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• 제21권4호
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• pp.1-10
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• 2006

This research is based on self-filling survey which 220 dental hygienists who work in seoul participated on July 2006 through August 2006. This survey was analyzed the experience item and occurred time of the symptoms and the time of acute and vanish of the symptoms that dental office's working environment effects on physical subjective symptom. We suggest a plan to minimizing physical subjective symptom for health manage of dental hygienist. We found out the fact that dental hygienists were unsatisfied with hospital air condition and this polluted air condition cause them physical subjective symptom in work place. As follows analyzed results ventilation time is below the 3-times a day, this may be have some trouble in indoor air quality. The experience the symptoms level is higher then non-experience level in "Fatigue and sleepiness", "Dorsalgia, omarthralgia, cervicodynia", "Hypersensitivity", "Dry eye, itch, smarting", "Headaches" and a subjective symptom is occurred at after 11:00(am) more then 60%, 50% of the dental hygienist. This experience the symptom' pain is vanished after the work and reduced when go out the office and building, respectively. The ratio of the experience the symptoms and starting time the symptoms is anywhere from 12 noon to 4 pm (73.2%) in a day. The time of acute pain the symptoms is anywhere from 12 noon to 4 pm (78.7%) refer to the individual characteristics and work environment.

• Journal of Forest and Environmental Science
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• 제25권3호
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• pp.187-194
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• 2009

This study was carried out to investigate vegetation structure and soil property of natural habitat of Polygonatum stenophyllum to provide basic information for propagation, conservation and restoration. Habitats of Polygonatum stenophyllum were classified into Hemiptelea davidii-Robinia pseudo-acacia dominant population (Yeongwol-eup), Pinus densiflora-Hemiptelea davidii-Callicarpa japonica dominant population (Nam-myeon), and Hemiptelea davidii-Rubus crataegifolius dominant population (Gangchon-ri). The soil pH 6.49~7.28; and electron conductivity 0.10~0.19 ds/m. The average content of organic matter, total nitrogen, available $P_2O_5$, $Ca^{2+}$, $Mg^{2+}$, $K^+$, and $Na^+$ were 8.24~16.45 g/kg, 0.02~0.13%, 45.67~123.67 mg/kg, 4.61~6.71 cmol(+)/kg, 0.17~0.63 cmol(+)/kg, 0.06~0.27 cmol(+)/kg and 0.03~0.30 cmol(+)/kg, respectively. Species diversity index (H'), maximum species diversity index (H' max), evenness (J') and dominance (1-J') of investigated sites ranged 1.0323 (Nam-myeon)~1.1134 (Yeongwol -eup), 1.4914 (Gangchon-ri)~1.6128 (Nam-myeon), 0.6401 (Nam-myeon)~0.7270 (Yeongwol-eup) and 0.2730 (Yeongwol-eup)~0.3599 (Nam-myeon) respectively.

• 한국치위생학회지
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• 제11권3호
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• pp.405-417
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• 2011

Objectives : A precedent research has documented that indoor air pollution is closely associated with increased the risk of symptom and decreased in job satisfaction. This study was conducted in an effort to assess the relationship of indoor air quality to self-perceived symptom and satisfied with working environment. Methods : This research is based on self-filling survey which 393 dental hygienists who work in seoul and Jeon-nam area participated on October 2010 through January 2011. This survey was compared and analyzed about the level of satisfaction and subjective symptom by the indoor air quality that dental office's working environment. Results : The result of satisfaction degree of hospital working environment was pretty low about office air. Most people mentioned that they were sore and dull all over the back, shoulder, and neck. Also, they were drowsy and exhausted in work place. Conclusions : In conclusion, it is need to improve their quality of life and mental health by developing proper air conditioning system and using one in their work place.

• 한국환경생태학회지
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• 제25권4호
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• pp.614-620
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• 2011

본 연구는 내장산국립공원 탐방객 281명을 대상으로 설문조사를 실시하여 탐방 후 평가를 통하여 만족도, 만족요인 과 예측모형을 분석하여 실질적인 공원관리의 기초자료를 제공하는데 그 목적이 있다. 만족도 분석결과 내장산사무소는 공공시설부족 및 불만, 이용프로그램부족, 숙박시설 부족 및 불만, 시설이용료부담감, 바가지요금 등, 백암사무소는 시설이용료부담감, 이용프로그램, 상업시설 불만 및 부족, 숙박시설 등에 불만족하였다. 만족요인으로는 '시설관리', '이용자관리' 요인이 내장산사무소(34.3%)와 백암사무소(45.6%)에서 가장 큰 영향을 미쳤으며, 만족도 예측모형에 있어서 내장산사무소는 '탐방로훼손', '상업시설만족도', '쓰레기처리', 백암사무소는 '문화역사자원훼손', '상업시설만족도', '호객행위방지' 등의 순으로 만족도에 영향을 미치는 예측모형이 만들어졌다. 지리적으로 유사한 위치에 있으며 자원과 특성이 비슷하여 큰 차이를 보이지 않았으며 탐방객의 75%가 집중하는 가을단풍기에 시설 및 이용자를 위한 관리기법이 필요한 것으로 나타났다.

• 농약과학회지
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• 제13권2호
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• pp.98-104
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• 2009

현재 오이에 등록되어 사용되고 있는 neonicotinoid계 살충제 dinotefuran과 thiacloprid를 시설재배 오이에 살포하여 생물학적 소실곡선식을 통한 수확 전 약제 살포 후 경과일수별 잔류량을 예측하였다. Dinotefuran의 검출한계는 0.01 mg/kg이고 thiacloprid의 검출한계는 0.005 mg/kg 이었다. 두 시험농약의 회수율은 dinotefuran과 thiacloprid에서 각각 85.78-89.52%와 85.71-95.31% 이었다. 회귀곡선식을 이용한 시험농약의 반감기는 dinotefuran의 경우 기준량 배량에서 모두 2.8일 이었고, thiacloprid의 경우 기준량 배량에서 각각 1,8일과 1.5일 이었다. 두 시험약제 초기 잔류량은 모두 잔류허용기준 이상이었으나 수확예정일의 시험농약의 잔류량은 모두 잔류허용기준 미만이었으며, 수확예정일의 잔류량으로 산출한 시험농약의 1일섭취허용량 대비 식이섭취량 비율은 모두 0.1% 미만이었다.