• Title/Summary/Keyword: Sampling Contents

Search Result 657, Processing Time 0.023 seconds

The Investigation of Analytical Techniques for Insulation Characteristics of Oil-Filled Transmission Cables (송전용 OF 케이블의 절연특성 분석방법에 대한 고찰)

  • Kim, Jong-Eun;Suh, Kwang-S.;Kim, Jung-Tae;Lee, Jun-Sun;Koo, Ja-Yoon
    • Proceedings of the KIEE Conference
    • /
    • 1999.07d
    • /
    • pp.1608-1610
    • /
    • 1999
  • To find effective diagnostic method for Transmission OF cables, various characterizations were carried such as DGA (dissolved gas analysis), water contents, total acidity and AC breakdown voltage. It was found that the result was varied by sampling and container. The results from those characterization method showed the present condition and history very well and could be used to estimate the degree of degradation of cables.

  • PDF

Exploring the Tasks Related with Educational Program Operation and Developing Its Performance Model of Rural HRD Center (농촌인적자원개발센터 교육운영의 직무탐색과 직무수행모델 개발)

  • Kim, Jin-Hwa
    • Journal of Agricultural Extension & Community Development
    • /
    • v.19 no.2
    • /
    • pp.241-271
    • /
    • 2012
  • The objectives of this study were to explore the duties and tasks of educational program operation, to develop the performance model including the duties and tasks, and to construct the action manual of the tasks and duties in related with implementing effectively the educational program. The findings of this study were as follows. First, The identifying duties and tasks was 1,942 related with implementing educational program operation based on theoretical job model through activity analysis and experience sampling techniques. Second, the finding duties and tasks was reconstructed through classifying with 9 duties and 88 tasks, and then it was developed as educational program operation model of Korean Rural HRD Center. Finally Third, the implementing manual was constructed including the contents and task-elements.

THE PHENOTYPIC RELATIONS BETWEEN SOMATIC CELL COUNTS AND MILK CONSTITUENTS OF CLINICAL AND NON-CLINICAL MASTITIS MILK OF DAIRY COWS

  • Kobayashi, S.;Ohtani, T.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.3 no.4
    • /
    • pp.293-298
    • /
    • 1990
  • Pathogen infections or mastitis inflammations usually develop differently on each udder of lactating cow. Although healthy udders will be attacked by the mastitis pathogens or the pathogens from blood in a long term, they would not be always inflamed. Somatic cell counts (SCC) in milk, which is utilized as an index of mastitis diagnosis, and the relation among SCC and milk constituents will have to be examined on each udder individually. Twelve cows of a Holstein cow herd in Nasu Research Station, which were suffering clinical or non-clinical mastitis, were selected, and SCC and milk constituents on each udder milk were measured. The effects of mastitis infection on udder milk components were relatively small except lactose content on udder milks of non-clinical mastitis (SCC< $10.0{\times}10^5$ per ml milk). On udder milks of clinical mastitis, however, high negative correlations were recognized between SCC and milk components. On different sampling days, high contents of fat and protein corresponded to that of total solids.

Heavy Metal Contamination of Indoor, Outdoor and Playground in Middle and High School in the Jeonju-City, Korea (전주시내 중고등학교 실내.외 환경의 중금속 오염에 대한 연구)

  • 조규성
    • Journal of Environmental Science International
    • /
    • v.9 no.6
    • /
    • pp.495-503
    • /
    • 2000
  • Dust samples were collected from 17 middle and high schools in the Jeonju-city. heavy metal concentrations were determined for the dry-deposited dusts from indoor and outdoor of classroom and playground of each sampling site. Concentrations of Cd, Cr, Cu, Ni, Pb and Zn in indoor\`s dusts were highly concentrated. Also heavy metal concentrations in outdoor\`s dusts were similar to that of indoor\`s dusts. Concentrations of Cd, Cu, and Zn in the dusts were much higher than the world average contents in soil and environmental orientation value. These levels are similar to those of the dust samples at middle schools located at Kangseo-gu and Yangchon-gu , Seoul. Playground dusts in 6 schools exhibited the enhanced heavy metal pollution with a pollution index (by Kloke) greater than 1.0. Most indoor and outdoor dusts exhibited the enhanced heavy metal pollution with a pollution index(by Cullbard et al.) greater than 1.0.

  • PDF

Historical Development in the Population and Household Survey System in Korea (우리나라 호구조사제도의 역사적 고찰)

  • 최봉호
    • Korea journal of population studies
    • /
    • v.17 no.1
    • /
    • pp.53-72
    • /
    • 1994
  • The historical study reveals that our ancestors had maintained a system which could produce data on population and households. The main purposes of maintaing the system at that time were taxation and conscription. At the present time, however, there are three major data sources which produce the statistics on pop-ulation and households in Korea : Civil Registration System, Resident Registration System and Popula-tion Census. These three systems are found to have some problems. there are some inherent problems in the regis-tration systems, such as problems in its coverage, accuracies in contents and timeliness in reporting the vital events and publishing the results. The population census has also non- sampling erors, such as errors in coverage, respone and non-response. Apart from the above mentioned problems, there are also conflicting problems arised from having three data sources, We can find some overlapping problems and difficulties in comparative studies. In the future, these problems should be considered for the improvement of the quality of statistics on population and household.

  • PDF

Disaster Handling through Volunteering and Charitable Donation: The Roles of South Korean Telethon, Involvement, and Collective-Efficacy

  • Jin, Bumsub
    • Asian Journal for Public Opinion Research
    • /
    • v.1 no.3
    • /
    • pp.203-216
    • /
    • 2014
  • This study examined whether South Koreans' philanthropic behaviors were related to the factors of two theoretical frameworks. From the involvement perspective, the study argued that three types of involvement with a telethon may be linked to volunteering and charitable donation behaviors. At the collective level, collective-efficacy may also be related to such behaviors. The study asked 279 South Koreans to respond to a Web survey that used convenience sampling. Results found that after controlling for demographics and past volunteer experiences, cognitive and behavioral involvement and collective-efficacy were positively related to volunteering behaviors, but affective involvement was not related. Moreover, only behavioral involvement and collective-efficacy were positively related to charitable donation. These results suggest that researchers and practitioners for volunteering resources need to use effective programs and contents for such behaviors in order to enhance involvement and level of collective-efficacy among community members in times of disaster.

Concentration level of Volitile Organic Compounds about the Air of Source Boundary Site in Seongseo Industrial Complex (대구성서산업단지 발생원부지경계 대기 중 휘발성유기화합물질의 농도수준)

  • An Sang-Young;Choi Sung-Woo
    • Journal of Environmental Science International
    • /
    • v.14 no.1
    • /
    • pp.53-60
    • /
    • 2005
  • The concentrations of volatile organic compounds(VOCs) in the ambient air were measured at various point(Source, source boundary) in Seongseo industrial complex during May to November 2003. Air samples were collected in Silcocan canister $(1{\ell},\;6{\ell})$ and analyzed using a cryogenic preconcentration system and GC/MSD. We identified 37 species by the US EPA(TO-14 method). The result showed a variety distribution of the con­centration, Higher concentrations of BTX, Styrene, 1,3,5-Trimethylbenzene, 1,2,4-Trimethylbenzene were observed at the sampling sites. They seemed to be emitted from the facility of wastewater treatment, reaction tank of chemistry factory and facility of Tenter. The concentrations of VOCs contents in Seongseo industrial complex were generally higher than those in Yeosu complex and Ulsan complex, although those were similar in Sihwa­Banwol complex.

A Survey on Some Heavy Metal Contents of Water and Rice in the Jeon-buk Area of Korea

  • Kim, Jong-Gyu;Lee, In-Kyu
    • Journal of Environmental Health Sciences
    • /
    • v.32 no.6
    • /
    • pp.556-559
    • /
    • 2006
  • This study was performed to investigate the levels of cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) in water and rice samples taken from five sites on a stream used for agricultural water in the Jeon-buk area, Korea. The water samples were randomly collected by the recommendations of the World Health Organization, and rice samples were randomly collected from rice paddy. The water and rice samples were analyzed by the recommendations of Food Code of Korea and using inductively coupled plasma spectrometer. Although there was variation between sampling sites, the levels of the metals in rice were on average much higher than those in water. The ratios of metal levels of rice to water were: $8.0{\sim}35.4\;for\;Cd;\;2.2{\sim}7.2\;for\;Cu;\;5.9{\sim}18.3\;for\;Pb;\;and\;10.6{\sim}75.7$ for Zn. These results suggest that there were transfer and bioaccumulation of the metals from the water to the rice taken place.

Beverage consumption and related factors of undergraduates in Jeonnam (전남 지역 일부 대학생의 음료섭취실태와 관련요인 연구)

  • Jung, Eun-Ju;Park, In-Suk
    • Journal of Korean society of Dental Hygiene
    • /
    • v.16 no.6
    • /
    • pp.1009-1022
    • /
    • 2016
  • Objectives: The purpose of the study was to investigate the beverage consumption and related factors of undergraduates in Jeonnam. Methods: A self-reported questionnaire was completed by 480 undergraduates in Jeonnam from June 1 to 15, 2016 based on convenience sampling. The questionnaire consisted of general characteristics of the subjects, beverage intake frequency, and awareness of beverage. Results: Carbonated beverage intake was 3.05 times per week and five kinds of beverage consumption was 12.48 times per week. Higher beverage intake was closely related to male students, higher beverage purchase, and lower awareness toward oral health impact by beverage and sugar contents. Conclusions: The recognition level of beverage related to oral health had an impact on the frequency of drink intake. It is necessary to educate the dietary guide for appropriate oral health management in beverage intake.

Generation and Decay Phenomena of Environmental Tobacco Smoke in Controlled Experimental Atmosphere Chamber (환경이 조절되는 Chamber 내에서 Environmental Tobacco Smoke의 생성과 감소 현상)

  • 이문수;나도영;안기영;이규서
    • Journal of the Korean Society of Tobacco Science
    • /
    • v.18 no.2
    • /
    • pp.170-176
    • /
    • 1996
  • This paper describes the generation and decay phenomena of gas, vapor and particulate phase components of environmental tobacco smoke in 18 m3 controlled experimental atmosphere chamber. Real time-weighted average concentration ratios of markers were determinated at no ventilation rates and sampling durations of starting to smoking 45 min. Average concentration of major ETS markers was no significant on the mainstream smoke contents of commercial cigarette and decay ratios were dependent on first order kinetic. RSP/nicotine, solanesol and 3-EP were good predictors of ETS concentration in the public indoor field. The concentration ratio of vapor phase and particulate phase components is highly variable to assessment of indoor air quality with ETS. Key words : ETS, chamber study, ETS markers.

  • PDF