• Title/Summary/Keyword: SURE추정

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Provenance Study on Lead Isotope of the Bronze Using a Korea Peninsula Lead Isotope Data - Focused on Bronze Relics Excavated from Cheonghaejin - (한반도 납광산의 납동위원소비를 이용한 청동 원료의 산지추정 - 청해진 출토 청동기를 중심으로 -)

  • Hwang, Jin Ju;Kim, So Jin;Han, Woo Rim;Han, Min Su
    • Journal of the Mineralogical Society of Korea
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    • v.27 no.4
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    • pp.263-270
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    • 2014
  • This paper was researched that provenance of the raw material for bronze relics excavated Cheonghaejin using the distribution of lead isotope ratio based on galena ores of South Korea. Also we want to make sure that the trace elements appearing as a by-product can be used as a secondary indicator for provenance research. In the case of the galena map of the East-North Asia (Mabuchi, 1985), data are plotted in China area. Therefore it is estimated that most bronzes were produced with lead ore from China. On the other hand, the same data are plotted in the Okcheon Metamorphic Belt and Yeongnam Massif of the galena map of South Korea (KOPLID, 2012). Also the contents of Ag and Sb are available as indicator due to separate ores from similar zone in lead isotope ratio.

The Impact of Information Technology Investment on Cost Reduction in Korean Insurance Industry (한국 생명보험산업의 정보화투자와 비용절감)

  • Lee Young-Soo;Jung Kun-Oh
    • Journal of Korea Technology Innovation Society
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    • v.9 no.1
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    • pp.175-198
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    • 2006
  • Analyzing the effects of information technology(IT) in the life insurance Industry is important in establishing the direction for future information technology investment. In this research, the cost-elasticity of IT capital stock was measured by the SUR technique, using the second-order translog cost function, which was drawn out by a Taylor expansion of the multi-product joint cost function. Analysis was made based on data from 1991 to 2003 collected from 33 life insurance firms. The results show that although the effects of information technology investment vary according to individual life insurance firms, half of the life insurance firms surveyed reduced their costs by investing in information technology. The research also revealed that although large life insurance firms reduced their costs by investing in information technology medium & small life insurance firms and foreign ,life insurance firms increase their costs. Additionally, although both information capital and information labor increase as the information budget increases, the increase in information capital is larger than one in information labor. Because the price of information capital is decreased rapidly more than one of information-related labor.

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The Position Estimation Algorithm based on Stochastic Sensor Model of RFID (RFID의 확률적 센서모델을 이용한 위치 추정 알고리즘)

  • Ji Y.K.;Moon S.W.;Park H.H.;Park J.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1478-1482
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    • 2005
  • Since it is a very issue that figures out a current position of mobile robots, various methods have been proposed until nowadays. This paper proposes the sensor model of RFID(Radio Frequency Identification) and position estimation algorithm for mobile robots. We designed the sensor model of RFID in experimenting repeatedly. The sensor model of RFID in this case is that of stochastics according to sensing rate. Based on this stochastic sensor model, we designed the algorithm which estimates distance and direction of RFID tag. Therefore we made sure that RFID tag is used as landmark.

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Age and Radial Growth Patterns of a Lace-bark Pine (Pinus bungeana), the Natural Monument NO. 4 of Korea (천연기념물 제4호 통의동 백송의 나이와 직경생장 유형)

  • 김은식
    • The Korean Journal of Ecology
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    • v.26 no.1
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    • pp.34-38
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    • 2003
  • An analysis of tree ring series of a lace-bark pine (Pinus bungeana Zuccarini) was carried out to find out the exact age of the tree, to describe life history of the tree affected by the change of past environmental factors, and to explain the relationships between the growth fluctuation of the tree and the change of environmental factors of the past. This study explicitly showed that the tree was about 300 years old in 1992 and that the previous estimate of the age to be about 630 years old has no ground to be justified. This was also ascertained by the close correspondence of the tree growth fluctuation to the fluctuation of soil moisture related environmental factors for the last 80 years in Seoul. Although it is clear that the tree suffered from slow growth for about 30 years initiating from the 1910s, it is not sure whether the soil moisture deficits or droughts during the years of 1910-1913 played a major role in causing the decline of the trees afterwards. Discussion was further extended for defining active roles for the Cultural Properties Administration of Korea in management and research to effectively protect the Old and Big Trees under the category of Natural Monument of Korea.

The Evaluation of Groundwater Pumping Capacity at a Catchment Area with Interrelated Wells in Volcanic Island: I. Without Consideration of Water Quality (상관우물들이 분포하는 화산섬 집수역에 대한 지하수 양수능의 평가 I. 수질(水質)을 고려하지 않은 경우)

  • Lee, Sunhoon;Machida, Isao;Imoto, Yukari
    • Journal of Environmental Impact Assessment
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    • v.12 no.3
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    • pp.189-198
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    • 2003
  • The purpose of this paper is to evaluate the groundwater pumping capadty at a catchment area containing interrelated wells without considering their qualities by using numerical simulation in Miyake Island, young volcanic island with very complicated hydro-geological formations. The groundwater pumping capadties of each well and over entire study area were estimated as the IMY(i,t) by individual withdrawals and the SSMY(t) by simultaneous withdrawals. These results can be used to secure a sure source for taking a plan for supplying water use in young volcanic island as Miyake Island. In simultaneous withdrawals, the withdrawals from well no. 5 and 6 should have the roles as the barrier wells against the intrusion of the groundwater of the part adjacent to Tairo Pond into the inner part of study area. Therefore, it can be suggested to adopt the simultaneous withdrawals as the optimal approach of groundwater management for supplying water use with respect to quantity and quality.

Performance estimation for Software Reliability Growth Model that Use Plot of Failure Data (고장 데이터의 플롯을 이용한 소프트웨어 신뢰도 성장 모델의 성능평가)

  • Jung, Hye-Jung;Yang, Hae-Sool;Park, In-Soo
    • The KIPS Transactions:PartD
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    • v.10D no.5
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    • pp.829-836
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    • 2003
  • Software Reliability Growth Model that have been studied variously. But measurement of correct parameter of this model is not easy. Specially, estimation of correct model about failure data must be establish and estimation of parameter can consist exactly. To get correct testing, we calculate the normal score and describe the normal probability plot. Use the normal probability plot, we estimate the distribution for failure data. In this paper, we estimate the software reliability growth model for through the normal probability plot. In this research, we applies software reliability growth model through distribution characteristics of failure data. If we see plot, we determine the software reliability growth model, we can make sure superior in model's performance estimation.

Fault Diagnosis for the Nuclear PWR Steam Generator Using Neural Network (신경회로망을 이용한 원전 PWR 증기발생기의 고장진단)

  • Lee, In-Soo;Yoo, Chul-Jong;Kim, Kyung-Youn
    • Journal of the Korean Institute of Intelligent Systems
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    • v.15 no.6
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    • pp.673-681
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    • 2005
  • As it is the most important to make sure security and reliability for nuclear Power Plant, it's considered the most crucial issues to develop a fault detective and diagnostic system in spite of multiple hardware redundancy in itself. To develop an algorithm for a fault diagnosis in the nuclear PWR steam generator, this paper proposes a method based on ART2(adaptive resonance theory 2) neural network that senses and classifies troubles occurred in the system. The fault diagnosis system consists of fault detective part to sense occurred troubles, parameter estimation part to identify changed system parameters and fault classification part to understand types of troubles occurred. The fault classification part Is composed of a fault classifier that uses ART2 neural network. The Performance of the proposed fault diagnosis a18orithm was corroborated by applying in the steam generator.

A study on the Estimation of $CO_2$ Emission in Container Port by using Container O/D Analysis (컨테이너 O/D 분식에 따른 $CO_2$ 배출량 추정)

  • Kim, Hwan-Seong;Jo, Min-Ji;Choi, Se-Kyung
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2009.06a
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    • pp.194-195
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    • 2009
  • According to the issue "global warming", many regulations and agreements with countries in the world are becoming set and it is being fulfill now. Under the progress of Post Kyoto Protocol agreement, It will be sure that Korea rave a duty to reduce $CO_2$ emission from 2013. For them, Korea have to make a strategies about the Climatic Change Convention for all industries. Recently, a great attention about $CO_2$ emission in the world is focused on port, shipping line and airline. Most countries are establishing policies to prevent environment from these industry fields, but Korea has not yet made for them. Thus, Korea need to collect $CO_2$ emission data not only the routes of container from port but also activities in the port. In this paper, an estimation of $CO_2$ emission under the route of container transportation at Korea by using O/D analysis will be addressed. And then, it will be used to make a optimal routes of container transportation which can reduce $CO_2$ emission in future.

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Estimates of Economies of Scale and Economies of Density in the Ocean Shipping Industry (외항해운산업의 비용함수 추정 : 규모 및 밀도의 경제성 분석을 중심으로)

  • 하영석
    • Journal of Korean Society of Transportation
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    • v.14 no.2
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    • pp.157-172
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    • 1996
  • The long-existed licence system which has acted as one of the strong barriers to entry in the ocean shipping market in Korea is supposed to repeal in the near future. As a result, competition among the different sizes of firms which are operating under regional shield by means of the licence will be intensified. The main objective of this paper is to estimate the degree of economies of scale and economies of density for various firm sizes. For the successful estimation of economies scale and economies of density, translog cost models are developed and estimated through SURE technique which was suggested by Zeller (1963). The major findings are as follows ; All shipping firms in the sample exhibit economies of scale and density. Even small size shipping firms under licence system, they show substantial economies of scale contrary to the wide-known idea that small-size firms are subject to diseconomies of scale. For the ranked firm sizes according to owned deadweight tons, the degree of economies of scale decreases as the firm sizes are larger and larger. The degree of economies of density moderately declines from the smallest to the firm size of 30-60 thousand deadweight tons and sharply rise thereafter. And the large shipping firms with over half-million deadweight tons exhibit high economies density compared to other sizes of firm. If follows that the larger firms have great advantage in competition if the licence system is abolished.

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Estimation of Setting Time of Chlorine By-pass System Dust Mortar using Setting Time Estimation (현장용 응결시간추정계를 이용한 고염화물 모르타르의 응결시간 추정)

  • Lee, Hyuk-Ju;Han, Jun-Hui;Hyun, Seong Yong;Shin, Yong-Seop;Lee, Jun-Seok;Han, Min-Choel
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.6-7
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    • 2018
  • In the previous study, durometer, namely rubber hardness tester Was used to confirm the possibility of using the setting time of concrete for determination. in this study, the possibility of using condensation time judgment condensation estimation system by comparing the measuring station setting estimation system Measuring needle of the proctor penetration resistance tester by newly making a measurement needle and refining the coagulation estimation system Want to make sure. As a result of this study, it was possible to use one condensation estimation system showing similar correlation between the two types of durometer showing high correlation with the penetration resistance value of proctor testers, It is considered to be fruitful to use the dew condensation estimation system for determining the setting time.

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