• Title/Summary/Keyword: K 지수

Search Result 9,854, Processing Time 0.039 seconds

A Study on Clarifying Relationship between the Traffic Culture Index and Traffic Accidents Using Structural Equation Model (구조방정식을 이용한 교통문화지수와 교통사고 발생의 영향관계 규명에 관한 연구)

  • Park, Woongwon;Joo, Sungkab;Lim, Joonbeom;Lee, Soobeom
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.34 no.5
    • /
    • pp.1571-1579
    • /
    • 2014
  • 93% of road traffic accidents result from drivers' fault and Korea has the largest number of deaths from traffic accidents among the OECD members. For this reason, the country is measuring Traffic Culture Index (TCI) in each city, gun and gu annually to improve traffic safety policies and promote safety consciousness, but the influencing relation between TCI and actual traffic accidents is only based on the assumptions and no verification has been carried out, yet. Therefore, this study aims to verify if in reality, TCI represents the traffic culture level and has an influencing relation with traffic accidents and to suggest an improvement plan of research on the present state of TCI, based on the result. For this purpose, bases on data of the report about the present state of TCI from 2010 to 2012, and the influencing relation between the number of traffic accidents and the number of deaths from traffic accidents was analyzed through structural equation model. For influencing relation analysis through structural equation, research 1 to analyze the relation among TCI in each city, gun and gu, the number of traffic accidents and the number of deaths, and research 2 to analyze the influencing relation of the increase in TCI, the number of traffic accidents and the number of deaths were carried out. When verifying the influencing relation with traffic accidents through structural equation, the goodness of fit of the model was low in research 1 and as TCI increased, the number of accidents and deaths decreased in research 2 and thus the effect of TCI was verified.

Selecting the Optimal Method of Competition Index Computation for Major Coniferous Species in Korea (우리나라 주요 침엽수종의 최적 경쟁지수 모형 선정)

  • Lee, Jungho;Lee, Daesung;Seo, Yeongwan;Choi, Jungkee
    • Journal of Korean Society of Forest Science
    • /
    • v.107 no.2
    • /
    • pp.193-204
    • /
    • 2018
  • This study was carried out to select the optimal method of competition index computation according to the competitor selection methods and distant-dependent competition index models, and to analyze the characteristics of competition indices in terms of thinning intensity and tree density targeting Pinus densiflora, Pinus koraiensis, and Larix kaempferi, which are the major coniferous species in Korea. Data was the re-investigated tree information from 240 permanent plots of 80 sites in the stands of P. densiflora, P. koraiensis, and L. kaempferi, which were located in the national forest of Gangwon and North Gyeongsang provinces. The number of subject trees with competition index calculated were 1126 trees for P. densiflora, 4093 trees for P. koraiensis, and 3399 trees for L. kaempferi. For the best competition index computation method, three kinds of competitor selection methods were considered: basal area factor, angle of height, angle of height to crown base. Also, six kinds of competition index models were compared: Lorimer, Martin-EK, Braathe, Heygi, Daniels, and Modified Daniels, which was developed in this study. Correlation coefficient was the best when the competitor selection method of basal area factor $4m^2/ha$ and the competition index model of Modified Daniels were used, and thus, it was selected as the best method for computing competition index. According to the best method by stand characteristics, competition index decreased in all species as thinning intensity was high and tree density was low.

A Longitudinal change of ODI and APDI on Three Facial Growth Patterns in Koreans with Normal Occlusion (정상 교합자의 세가지 안면 성장유형에 따른 ODI, APDI의 변화)

  • Lee, Sun-Reong;Park, Kyung-duk;Kyung, Hee-Moon;Sung, Jae-Hyun
    • The korean journal of orthodontics
    • /
    • v.26 no.5 s.58
    • /
    • pp.557-568
    • /
    • 1996
  • The purpose of this study was to analyze the growth changes of ODI and APDI with age on the three facial growth patterns. The biennial serial cephalometric radiographs of 19 male and 14 famale samples with normal occlusion during 10 years were used in this study. The samples were divided into three groups - drop type, neutral type, forward type - by the total change of the Y-axis during the periods of the study. The findings in this investigation indicated the following: 1. The mean values and standard deviations of each age group in each facial type of male and famale were obtained. 2. The difference of ODI and APDI among the 3 facial types was not significant through all observed ages(P)0.05). The size of ODI appeared large consistently in order of the drop, neutral, and forward type in both male and female through all observed ages. 3. The ODI and APDI were maintained without any charges with age during the periods of the study(p>0.05). 4. In correlation analysis between the total change of the Y-axis and 6 measurements, the AB plane angle and facial angle showed correlation in both male and female(p<0.05), the APDl in only female(p<0.001), but the ODI not appeared correlation in either male or female(p>0.05).

  • PDF

Estimation of Rainfall-runoff Erosivity Using Modified Institute of Agricultural Sciences Index (수정 IAS 지수를 이용한 강우침식인자 추정)

  • Lee, Joon-Hak;Oh, Kyoung-Doo;Heo, Jun-Haeng
    • Journal of Korea Water Resources Association
    • /
    • v.44 no.8
    • /
    • pp.619-628
    • /
    • 2011
  • The purpose of this study is to evaluate the existing method of calculating rainfall-runoff erosivity using monthly precipitation, such as Fournier's index, modified Fournier's index, IAS (Institute of Agricultural Sciences) index, etc., and to present more reasonable regression model based on monthly rainfall data in Korea. This study introduced a new simplified method of calculating rainfall-runoff erosivity based on monthly precipitation, called by modified IAS index. It was expanded form IAS index which is the simple calculation method by summing up the rainfall amount of two months with maximum amount. Monthly precipitation and annual rainfall-runoff erosivity at 21 weather stations for over 25 years were used to analyze correlation relationship and regression model. The result shows that modified IAS index is the more reasonable parameter for estimating rainfall-runoff erosivity of the middle-western and south-western regions in Korea.

Technical Analysis of Unmaned Aircraft System using Revealed Patent Advantage and Patent Impact Index (현시특허우위지수와 특허영향력지수를 활용한 무인항공기 기술경쟁력 분석)

  • Park, Seung;Hong, Sung-Dae;Hong, Hyun-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.8
    • /
    • pp.2835-2839
    • /
    • 2010
  • This paper estimated the technical specialization of UAV system by analyzing related patents. For that, variable indicators such as patent numbers regarding country, subsystem technic, periods and revealed number of patents are used in this paper. RPA and PII index are also used to estimate technical specialization of the coutry. Positive RPA value means superior competitiveness, and vice versa. PII means the quality of the patent. PII value more than 1 means that the quality of the patent is better than others, Otherwise the quality of the patent is worse. This paper estimated the specialization of technologies among countries using above two index.

A Study on the Improvement of Risk Assessment Items and Index for Sunken Ship (침몰선박 위해도 평가항목 및 평가지수 개선에 관한 연구)

  • Lee, Seung-Hyun;Choi, Hyuek-Jin;Suh, Jae-Joon
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.21 no.6
    • /
    • pp.704-711
    • /
    • 2015
  • In this study, we have conducted a survey of AHP technique through the ocean experts to derive new items and revise assessment items and indices for risk of sunken ships based on the survey results. As a result of the survey, two new items such as accident cause and tidal current are derived. And it shows that existing items such as toxic liquid substance, remaining oil and explosive gas which were evaluated as one group are desirable to be evaluated respectively. Accordingly, we analyze the indices of the new eleven assessment items adjusted from the existing seven assessment items. As a result, the indices are ordered by toxic liquid substance, possibility of leaking, explosive gas, carrying capacity of fuel oil, sensitivity of sea environment, marine traffic environment, cause of accident, tidal current, keel clearance, ship type, and ship size. Especially, as compared with the indices of existing assessment items, the indices of sensitivity of sea environment and possibility of leaking are higher and the index of keel clearance is lower.

Estimation and Assessment of Bivariate Joint Drought Index based on Copula Functions (Copula 함수 기반의 이변량 결합가뭄지수 산정 및 평가)

  • So, Jae Min;Sohn, Kyung Hwan;Bae, Deg Hyo
    • Journal of Korea Water Resources Association
    • /
    • v.47 no.2
    • /
    • pp.171-182
    • /
    • 2014
  • The objective of this study is to evaluate the utilization of bivariate joint drought index in South Korea. In order to develop the bivariate joint drought index, in this study, Clayton copula was used to estimate the joint distribution function and the calibration method was employed for parameter estimation. Precipitation and soil moisture data were selected as input data of bivariate joint drought index for period of 1977~2012. The time series analysis, ROC (Receiver Operating Characteristic) analysis, spatial analysis were used to evaluate the bivariate joint drought index with SPI (Standardized Precipitation Index) and SSI (Standardized Soil moisture Index). As a result, SPI performed better for drought onset and SSI for drought demise. On the other hand the bivariate joint drought index captured both drought onset and demise very well. The ROC score of bivariate joint drought index was higher than that of SPI and SSI, and it also reflected the local drought situations. The bivariate joint drought index overcomes the limitations of existing drought indices and is useful for drought analysis.

Distance relay Monitoring System Design by using Vulnerability Index using of Sensitivity Factor and expecting acting time of Distance relay (민감도 지수를 이용한 취약도 지수와 거리계전기 동작 시간 예측 알고리즘을 적용한 모니터링 시스템 설계)

  • Kim, Jin-Hwan;Lim, Il-Hyung;Lee, Seung-Jae;Choi, Myeon-Song;Lim, Seong-Il;Kim, Sang-Tae
    • Proceedings of the KIEE Conference
    • /
    • 2008.11a
    • /
    • pp.175-177
    • /
    • 2008
  • 본 논문에서는 I-PIU를 통해 등기화된 데이터를 취득 이용하여 실시간 계통 감시는 물론 광역정전방지에 대한 방법을 제안하고 있다. 또한 민감도 지수(Sensitivity Factor)를 이용한 취약도 지수(Vulnerability Index)와 실시간 데이터를 이용한 거리계전기 동작을 예측 알고리즘을 적용하여 실시간 계통의 상황감시는 물론 계통의 위험 정도를 미리 알리는 거리 계전기 모니터링 시스템을 설계하였다 이는 운영자로 하여금 개통의 위험 요소를 적절한 조치를 취해 제거함으로써 치명적인 광역 정전 사태의 방지와 효율적 계통관리를 기대 할 수 있다.

  • PDF

Developing the Index of Foodborne Disease Occurrence (식중독 발생지수 개발)

  • Choi, Kook-Yeol;Kim, Byung-Soo;Bae, Wha-Soo;Jung, Woo-Seok;Cho, Young-Joon
    • The Korean Journal of Applied Statistics
    • /
    • v.21 no.4
    • /
    • pp.649-658
    • /
    • 2008
  • As the Eating Out Businesses are making rapid progress and most of the schools and the firms serve the meals, the foodborne disease has occurred increasingly and lots of researches and the policies are studied to prevent it. In Korea, the foodborne disease index for prevention is developed by using bacterial growth rate on the temperature to give the information about the danger level of the foodborne disease, but the gap between real status of the occurrences and the predicted danger level has been pointed out. This study aims at developing the index of the foodborne occurrence based on the log linear model using the data of the foodborne disease occurrence and the meteorological data for the last three years($2004{\sim}2006$). Comparison between the new index and the existing index showed that the new index is better in explaining the foodborne disease occurrence.