• 제목/요약/키워드: 1996~2010

검색결과 218건 처리시간 0.027초

통신.방송 융합시대의 네트워크 기술

  • 한국정보통신산업협회
    • 정보화사회
    • /
    • 통권105호
    • /
    • pp.36-39
    • /
    • 1996
  • 통신.방송 융합시대의 네트워크 기술은 어떻게 전개될 것인가. 일본은 2010년까지 광 화이버망의 전국 정비를 추진할 필요가 있으며 또한 원할하고도 효율적으로 가입자계 네트워크 인프라를 구축하기 위하여 요구되는 네트워크의 기본적 조건을 명확히 함이 중요하다고 "정보통신기반정비프로그램"에서 지적하고 있다.

  • PDF

통계적 방법에 의한 우리나라의 낙뢰특성 분석

  • 정지열
    • 전기기술인
    • /
    • 통권340호
    • /
    • pp.30-33
    • /
    • 2010
  • 낙뢰관련 국제화 규격에 적절히 대응하고, 적합한 설계 시공을 위해서는 낙뢰특성에 대해 정확한 이해가 필요하다. 그러나 우리나라 낙뢰와 관련된 기초연구 자료들을 찾기가 어렵다. 이에 따라 본 연구는 1996년 1월부터 2009년 12월까지 14년간 한국전력연구원에서 관측한 낙뢰자료를 토대로 통계적 방법에 의해 시간적 계절적 지역적 낙뢰특성과 뇌전류의 특성 등을 비교 분석하고 그 결과를 제시함으로써 실무에 활용토록 하는데 목적이 있다.

  • PDF

한반도 여름 강우량의 변화에서 1996년을 중심으로 나타나는 남북진동 패턴 (The South-North Oscillation Centered on 1996 in Korean Summer Rainfall Variability)

  • 최기선;오수빈;김도우;변희룡
    • 대기
    • /
    • 제20권2호
    • /
    • pp.91-100
    • /
    • 2010
  • In accordance with the time series of rainfall in summer (June, July and August) in South and North Korea for recent 28 years (1981-2008), rainfall is substantially increased in South Korea since 1996, while it is significantly decreased in North Korea. In particular, the decreasing tendency of rainfall in summer in North Korea is more definitely observed during the $2^{nd}$ rainy season (late August - mid September) in intraseasonal variation. Such a feature is also confirmed in the spatial distribution of oscillation pattern between South and North Korea on the basis of 1996 which is obtained by empirical orthogonal function analysis using the summer rainfall observed in all weather observation stations in South and North Korea. For the decreasing tendency of rainfall in North Korea, it is found that northeasterlies from anticyclonic circulation centered on around Baikal Lake weaken convective activity during summer. On the contrary, the increasing tendency of rainfall in South Korea is related to the strengthened cyclonic circulation in the southern region of China and accordingly, enhances southwesterlies in South Korea.

전압 이득과 변조지수 제어에 의한 3상 Z-소스 인버터의 출력 교류 전압 제어 (Output AC Voltage Control of a Three-Phase Z-Source Inverter by the Voltage Gain and Modulation Index Control)

  • 김세진;정영국;임영철;양승학
    • 전기학회논문지
    • /
    • 제59권11호
    • /
    • pp.1996-2005
    • /
    • 2010
  • This paper proposes a new method for constant control of the output AC voltage of a voltage-fed three phase Z-source inverter (ZSI), in case of Z-network DC voltage variation or heavy change of load. The modulation index for the reference output AC voltage of ZSI can be calculated by the basic definition of ZSI, the input DC voltage and capacitor voltage of Z-network. And, the output AC voltage of ZSI is controlled by the modified space vector modulation (SVM) with the calculated modulation index. By the proposed method, the modulation index of output AC voltage is closely following in the reference modulation index. The validity of the proposed method is verified using PSIM simulation. In case which the input DC voltage of ZSI is heavily changed from 100[V] to 70[V] (or to 150[V]) and in case which load is changed from $30[\Omega]$ to $10[\Omega]$, we confirmed that the output AC voltage of ZSI is constantly controlled by the proposed method because the modulation index of ZSI is also simultaneously changed. Finally, FFT and %THD of the output voltage and current of ZSI by the proposed method are analyzed.

토양 중 농약의 동태 (Behavior of Pesticides in Soil)

  • 이규승
    • 농약과학회지
    • /
    • 제14권3호
    • /
    • pp.303-307
    • /
    • 2010
  • 총설은 1996년 "농업생태계에 대한 잔류농약의 영향평가"라는 총설 이후 국내에서 발표된 토양 중에서의 농약의 동태에 관한 연구 보문을 요약 정리한 것이다. 내용은 농약의 지표면 유출, 농약의 토양 중 흡착 및 탈착, 농약의 토양 중 용탈, 농약의 토양 종 분해는 미생물에 의한 분해와 비생물학적 분해로 나누어 검토하였고, 농약의 토양 종에서의 행적 및 토양 중 잔류와 잔류 분석법 등으로 구분하여 정리하였다.

Vanapalli 등의 제안식을 적용한 화강풍화토 불포화사면의 안정성해석 (Slope Stability Analysis of Unsaturated Slope composed of Weathered Granitic Soils using the Equation of Vanapalli et al.)

  • 백환조;김경만;김대훈
    • 산업기술연구
    • /
    • 제30권B호
    • /
    • pp.3-10
    • /
    • 2010
  • The numerical study was conducted using the equation of Vanapalli et al.(1996) related shear strength of unsaturated soils. Angle of shearing resistance(${\Phi}^b$) and angle of internal friction(${\Phi}^{\prime}$) appear identically in lower suction range, but angle of shearing resistance(${\Phi}^b$) has non-linearity as suction increases. Nevertheless, the numerical study was conducted using angle of shearing resistance(${\Phi}^b$) in even lower suction range because of limit of program function. However, behavior of real ground on applying numerical study can be analysed wrong by it. Therefore in this paper numerical analysis on applying the equation of Vanapalli et al.(1996) and ${\Phi}^b$ has been compared about unsaturated slope considering continuous rainfall.

  • PDF

Analysis of Cancer Incidence and Mortality in the Industrial Region of South-East Siberia from 1991 through 2010

  • Kutikhin, Anton G.;Yuzhalin, Arseniy E.;Brailovskiy, Valeriy V.;Zhivotovskiy, Alexey S.;Magarill, Yuri A.;Brusina, Elena B.
    • Asian Pacific Journal of Cancer Prevention
    • /
    • 제13권10호
    • /
    • pp.5189-5193
    • /
    • 2012
  • Kemerovo is an industrial region of the Russian Federation characterized by highly developed mining, chemical, metallurgical and power industries. Many of the factories were closed down due to the socioeconomical crisis in the early 90's, and economic potential of the survivors has also decreased significantly. Paradoxically, this has led to the improvement of the ecological situation in the region and elimination of exposure to many chemical carcinogens. This factor, in combination with the improvement of oncological care, might be expected to have lead to a decline of cancer incidence and mortality in the region. To assess trends of cancer incidence and mortality in Kemerovo Region, we therefore carried out an analysis of relevant epidemiological data during 1991-2010. In fact, a significant increase of cancer incidence overall was revealed during 2001-2010. Male cancer incidence was significantly higher than female cancer incidence. Regarding gastric cancer incidence, statistically significant differences during 2001-2010 were found only for men, and male incidence exceeded female incidence. Concerning colorectal cancer incidence, it was lower during 2001-2005 and 2006-2010 as compared to the period of 1991-1996. Lung cancer incidence was significantly higher during 1991-2000 compared to 2001-2010. Among urban populations, cancer incidence was higher in comparison with rural population, but a gradual steady convergence of trends of cancer incidence among urban and rural populations was noted. Lung cancer, breast cancer, colorectal cancer, non-melanoma skin cancer, and gastric cancer are the most prevalent cancer forms in Kemerovo Region. There were no differences in cancer mortality between 2001-2005 and 2006-2010; however, male cancer mortality exceeded female cancer mortality. A similar situation was observed for gastric cancer, colorectal cancer, and lung cancer. Cancer mortality among urban populations exceeded mortality among rural population, for both genders. We suggest that these data can be used for development of modern programs of cancer prevention and early diagnostics in industrial regions of Siberia.

교육과학기술정보화기본계획의 비전과 전략에 관한 연구 - 과학기술분야를 중심으로 - (Study on the Vision and Strategy of Education and S&T Informatization Fundamental Plans - Focused on Science and Technology-)

  • 김상국;최병선;이명선
    • 한국콘텐츠학회:학술대회논문집
    • /
    • 한국콘텐츠학회 2011년도 춘계 종합학술대회 논문집
    • /
    • pp.171-172
    • /
    • 2011
  • 교육과학기술부는 정보화 시대의 '디지털 인재'를 육성한다는 비전을 담은 '교육과학기술 정보화 5개년(2010~2014년) 기본계획'을 확정하고, 2010년부터 본격적으로 추진하였다. 교육과학기술정보화 기본계획은 1996년 이후 교육과 연구개발 분야가 별개 추진되던 정보화 계획이 통합됨으로써 교육과 과학기술 정보화 융합의 전기를 마련하였다. KISTI는 과학기술 정보화 대표기관으로서 교육과학기술정보화 기본계획 수립에 참여 하였으며, 이에 본 논문에서는 과학기술분야 중심으로 기본계획을 살펴보고 발전방향을 살펴보도록 한다.

  • PDF

어머니와 가정보육시설 보육교사의 안전사고에 대한 두려움과 안전 예방 행동에 대한 비교 연구 (Comparison of Fear and Prevention Behavior on Accident between Mother and Teacher in Family Childcare Center)

  • 김혜금
    • 대한가정학회지
    • /
    • 제48권3호
    • /
    • pp.43-53
    • /
    • 2010
  • This study aimed to compare fear and prevention behaviors on accidents between mothers and teachers in family childcare centers. The participants were 117 mothers whose children were 0~2 year-olds and 121 teachers. Based on Hendrickson(2008) and Reichert & Henricks(1996), the scale was developed by the researcher, and it was composed of fear and prevention behaviors on accident. The data were analyzed using descriptive statistics and $x^2$ analysis. Results showed that mothers feared fall accidents and step-on-accidents while teachers feared suffocation accidents and liability for injury medical fee. Also, mothers did more prevention behaviors on use of car seats than teachers, whereas teachers did more behaviors on walk safety, custody of drugs and dangerous articles, and food safety.

소비자의 혁신성이 모바일 광고 수용에 미치는 영향에 관한 연구 (A study on the Influence of Consumer Innovativeness on the Acceptance Intention in Mobile Advertising)

  • 박종순;이종만
    • 디지털산업정보학회논문지
    • /
    • 제6권2호
    • /
    • pp.209-224
    • /
    • 2010
  • This study is focus on consumer innovativeness. The purpose of this study is to explore variable that affect users' perceived value of mobile advertising and actual response intension to analyze relationship among variables. We built research new model based on the Technology Acceptance Model(TAM) and the Ducoffe's model(1996). The result of this study can be summarized as below. First, consumer innovativeness had a positive effect on convenience, the entertaining element and informativeness. Second, credibility and convenience had a positive effect on mobile advertising value. Third, Mobile advertising value had a positive effect on actual response intention to mobile advertising. As shown in the result of this study, the relation between perceived value of mobile advertising and actual response intention, depending on innovativeness in accordance with mobile advertising characters elements.