• Title/Summary/Keyword: 유발수요

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Water Governance and Basic Water Law (물거버넌스와 물관리기본법)

  • Lee, Seung-Ho;Kim, Sung
    • Proceedings of the Korea Water Resources Association Conference
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    • 2009.05a
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    • pp.385-389
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    • 2009
  • 본 연구의 목적은 물거버넌스 개념과 1997년, 2006년 물관리기본법안 분석을 통해 한국의 새로운 물관리 체제를 모색하는 것이다. 물거버넌스는 물관리정책과 계획의 수립, 시행, 평가에 있어 정부뿐만 아니라 일반 기업, 시민, 환경단체, 전문가 등 여러 이해당사자를 참여시키는 것을 핵심으로 한다. 거버넌스란 기존의 정부 주도의 정책 계획, 수립, 시행이 아닌 비정부 조직과의 타협, 협의, 논의를 통한 양방향 정책결정 과정을 뜻한다. 따라서 물거버넌스의 가장 중요한 원칙은 다양한 이해당사자 참여를 통한 정책결정의 복수화 과정이다. 한국의 물거버넌스를 시행하기 위해 가장 필요한 요건은 이해당사자 참여를 우선 중앙, 지방정부에서 그 필요성을 인식하고 법, 제도 등을 통해 제도화하는 것이다. 환경부 주도로 입안된 1997년 물관리기본법안은 물관리일원화, 적정사용, 유역관리, 비용부담, 균형배분의 5원칙을, 2006년 물관리기본법안은 물관리일원화 대신 통합물관리, 적정사용 대신 수요관리를 삽입하여 5원칙을 제시하였지만 이해당사자 참여는 원칙에 포함시키지 않았다. 이해당사자 참여 원칙의 제도화가 없이는 위의 두 법안이 제시한 원칙의 적용과 시행이 어려움에 봉착할 가능성이 높다. 왜냐하면 다른 원칙은 다양한 이해당사자 참여를 통한 사회적 합의 없이는 시행이 쉽지 않은 정치적으로 민감한 사항들이기 때문이다. 예를 들어 물의 균형배분 원칙 관련, 만약 상류와 하류 주민 간의 합의가 없이 어느 한 이해당사자의 일방적 행위가 있을 경우 큰 갈등을 유발할 수 있다. 물거버넌스을 실행하기 위해 중앙에 필요한 조직은 물이용 관련 물분쟁 발생 시 이를 조정하고 국가물관리계획을 수립하며 물관리 문제 전반을 총괄하는 조직이다. 1997년, 2006년 기본법안은 국가물관리위원회 설치를 제시하였고 2006년 기본법안에서 보다 구체적으로 위상, 운영, 역할 등에 대해 언급하였다. 하지만 국가물관리위원회는 물관련 중앙부처의 장, 지방행정조직의 장만을 포함하여 유역관리를 책임질 유역관리조직의 장에 대한 언급이 없다. 물거버넌스 실현을 위한 유역관리 시행이 바람직하기에 유역관리조직의 장도 국가물관리위원회에 참여하는 것이 바람직하다. 또한 두 기본법안 모두 국무총리실 산하에 위원회를 속하게 하였는데 이를 수정하여 대통령 직속기구로 규정하는 것이 국가물관리위원회가 정치, 행정, 재정적 압력에서 벗어나 일관성 있는 정책을 펼 수 있는 지름길이 될 것이다. 또한 지방의 물문제를 물관리계획에 적절히 반영하고 대응방안을 수립, 시행하기 위해서는 정부 관료뿐만 아니라 지방의회 의원, 환경단체, 기업, 시민, 전문가 등의 다양한 이해당사자가 참여하는 유역위원회가 필수적이다. 또한 유역 관련 물관리계획을 수립하고 사업을 추진하는 유역관리청도 필요하다. 유역위원회와 유역관리청은 유역 내 여러 이해당사자들이 물관리에 대해 다양한 의견을 개진하고 토론하며 합의점에 이르는 거버넌스를 수립할 수 있는 중요한 조직이다. 두 기본법안은 유역관리 원칙을 제시하긴 하였지만 유역관리 시행 관련 조직, 역할, 운영 등에 대해서는 언급이 없었다. 한국의 물관리는 소득, 문화 수준 향상으로 인한 양질의 물공급에 대한 요구, 시민사회의 발전, 지방분권화 등 정치, 경제, 사회의 변화를 수용하고 발전해 나가기 위해서는 여러 이해당사자의 참여와 합의에 바탕을 둔 물거버넌스 수립이 무엇보다 중요하다. 또한 이를 시행하기 위해서는 물관리기본법을 하루 속히 제정하여 제도적 기반을 갖춰 보다 효율적인 물관리시스템을 수립해야 한다.

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Fundamental Properties of Porous Concrete According to the Sizes of Aggregate (골재 크기에 따른 포러스콘크리트의 기초물성에 관한 실험적 연구)

  • 김무한;백용관;강석표;김용로;김재환
    • Journal of the Korea Concrete Institute
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    • v.13 no.5
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    • pp.438-446
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    • 2001
  • Recently, porous concrete has been used for the purpose of decreasing the load of earth environment. It consists solely of cement, water and uniform-sized coarse aggregate. And its fundamental properties will be considerably affected by the physical properties of aggregate because the aggregate occupies for the most part in its mix proportion. For such a reason, this study was carried out to investigate the influence of the sizes and kinds of aggregate for the fundamental properties of porous concrete. It showed that the fundamental properties of porous concrete were the similar value in all sizes of aggregate except in the case of using the 2.5∼5㎜ aggregate and were varied according to the kinds of aggregate. In particular, compressive strength of porous concrete using 2.5∼5㎜ aggregate was more higher than that using other aggregate, and its void ratio and coefficient of permeability was lower. And the maintenance capacity of permeability of porous concrete was varied by the sizes and the kinds of aggregate. In particular, it was greatly decreased in case of using the 2.5∼5㎜ aggregate. And unlike dynamic modulus of elasticity of ordinary concrete, that of porous concrete was very high value in early ages and was slowly increased after that time.

Satellite finite element model updating for the prediction of the effect of micro-vibration (미소진동 영향성 예측을 위한 인공위성 유한요소모델 보정)

  • Lim, Jae Hyuk;Eun, Hee-Kwang;Kim, Dae-Kwan;Kim, Hong-Bae;Kim, Sung-Hoon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.8
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    • pp.692-700
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    • 2014
  • In this work, satellite FE (finite element) model updating for the prediction of the effect of micro-vibration is described. In the case of satellites launched in low earth orbit, high agility and more mission accomplishments are required by the customer in order to procure many images from satellites. To achieve the goal, many mechanisms, including high capacity wheels and antennas with multi-axis gimbals have been widely adopted, but they become a source of micro-vibration which could significantly deteriorate the quality of images. To investigate the effect due to the micro-vibration in orbit on the ground, a prediction is conducted through an integrated model coupling the measured jitter sources with FE (finite element) model. Before prediction, the FE model is updated to match simulation results with the modal survey test. Subsequently, the quality of FE model is evaluated in terms of frequency deviation error, the resemblance of mode shapes and FRFs (frequency response functions) between test and analysis.

Performance test of double swirl burner for the development of pilot scale compact gasifier (컴팩트 석탄 가스화기 개발을 위한 이중선회버너 운전 평가)

  • Kang, Suk-Hwan;Ryu, Jae-Hong;Chung, Seok-Woo;Jung, Woo-Hyun;Yoo, Sang-Oh;Lee, Do-Yeon;Yun, Yongseung;Lee, Jin-Wook;Kim, Gyoo-Tae;Yi, Min-Hoe
    • Journal of Energy Engineering
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    • v.22 no.2
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    • pp.96-104
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    • 2013
  • Coal gasification is considered as one of the best alternatives among clean coal technology and new concept next generation technologies are under being developed to achieve low cost as well as high efficiency. In this study we have developed double swirl multi-burner as part of the development of low cost compact gasifier. We installed new concept multi-burner with pulverized coal distributor to the body of existing gasifier for burner test. Gasification test was performed under the condition of $6.4{\sim}7.2kg/cm^2$ and $1170{\sim}1300^{\circ}C$ by using Indonesian ABK (sub-bituminous) coal to get operation condition of new concept multi-burner. Our interest was focused to ensure a stable operating condition rather than the gasifier performance evaluation. As a result, we were able to achieve the carbon conversion of 84% and the cold gas efficiency of 52.1% at the stable operating conditions.

A Reduction Effect in Noise Reflection by Different Shapes of Soundproofing-panel (도로소음원에 대한 방음패널 형상별 반사소음 저감효과)

  • Kim, Ilho;Park, Taeho;Chang, Seoil;Lee, Haein
    • Journal of Korean Society of Environmental Engineers
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    • v.37 no.2
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    • pp.120-125
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    • 2015
  • With rapid urbanization, the volume of traffic in urban area has been significantly increased. This in turn led to problem which can be described as Road Traffic Noise. Currently, to alleviate the road traffic noise damage, a demand for installation of soundproofing walls is rising. Among different shapes of soundproof walls being installed, the reflection-type acoustical insulation panel is highly drawing attentions of residents due to the fact that it does not obstruct their field of vision in contrast with the opaque acoustical insulation panel. On the other hand, improving the soundproofing wall of the reflection-type acoustical insulation barrier panel needs to be focused on since it has a possibility to cause a secondary damage by reflected sounds. Therefore, in this research, study has been carried out to improve the forms in order to minimize travelling of reflected sounds through changing the frontal surface shape and geometrical shape of the reflection-type soundproofing panel. A result from comparison between the normal reflection-type soundproofing panel and the improved soundproofing panel, with reduction effects in the noise reflection, showed that the curved type of soundproofing panel has an impact on reducing the noise up to 1.5 dB. Furthermore, from the research conducted, it appears that the increase and decrease in the reflected sounds can be changeable depending on various design factors. Thus, it turns out that the study shows a potential possibility to develop a reduction technology of the reflected sounds pertaining to overall condition on the soundproofing walls.

Analysis of Regional Specialization and Value-added Contribution of Local Logistics Industry (지역 물류산업의 특화도와 지역경제 부가가치에 미치는 영향 분석)

  • Park, Seonyoul;Park, Ho
    • Journal of Korea Port Economic Association
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    • v.36 no.2
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    • pp.87-108
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    • 2020
  • The Korean logistics industry has grown with the development of domestic industries. The industry plays an important role in national and regional economic growth, and the government has continued policy efforts to foster the industry. This study analyzes the competitiveness of the regional logistics industry and its contribution to the regional economy. Location coefficients are used to analyze local specialization in each logistics industry. The value-added rate, GDP contribution, value-added induction coefficient, and net value-added income of regional logistics industries are analyzed using a regional input-output table. As a result, the logistics industry is found to have net value-added income and competitiveness in some regions, and there is no relationship between the location coefficient and the value-added contribution of the regional logistics industry. Seoul, Incheon, Gyeonggi, Busan, and Jeju have the competitiveness of each logistics industry. In addition, we identified the regions where the logistics infrastructure is well developed and those in which it needs to be supported. The regions where the logistics industry has developed require policies for making high value-added by logistics activity, and regions with insufficient growth need to support the development of the logistics industry by investing human resources and capital that can meet the local demand.

Microscopic Study on the Warrants for TWLTL Based on the DHV - Focusing on the Section with Overlapping Left-turn Movements - (설계시간 교통량 기반 양방향 좌회전차로의 설치기준에 관한 미시적 연구 - 좌회전 상충이 발생하는 구간을 중심으로 -)

  • Lee, Ji-Sun;Shin, Chi-Hyun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.13 no.5
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    • pp.1-10
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    • 2014
  • This research focuses on the warrants for the Two-Way Left-Turn Lanes (TWLTL). Using a microscopic traffic simulation tool, two key parameters were investigated herewith. One is a wide range of the Design Hourly Volume (DHV), reflective of recent Korean roadway volume characteristics, that is conventionally reduced from the Average Daily Traffic (ADT). The other is driveway spacing, the length of the middle-lane section where two conflicting left-turn demands often compete for space. In addition, unlike previous researches, the way and the procedure the TWLTL operation is realized in the VISSIM S/W with its add-on application such as VISVAP is clearly stated and described in detail. According to the result of simulations for 10 volume scenarios, as expected, the higher the volume level is, the more delay the left-tuner experience. The Level Of Service (LOS) for most cases was in the range of C and D based on the non-signalized intersection LOS criteria. Furthermore, the TWLTL was found operable up to the volume level of 1,116 and 1,860 vph in heavy direction (equivalent of volume level 7) for 3-lane and 5-lane facility respectively, which covers significant portion of existing two to four-lane highway volumes in Korea.

Analysis of Medical Expenses Structure for Patients on Percutaneous Coronary Intervention by Medical Security Type (의료보장형태에 따른 관상동맥중재술 환자의 진료비 구조분석)

  • Son, Mi-Kyung;Lee, Sok-Goo
    • Journal of agricultural medicine and community health
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    • v.44 no.4
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    • pp.195-208
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    • 2019
  • Objectives: The purpose of this study was to analyze whether there are differences in medical expenses according to medical security type in the use of medical services with high disease burden such as coronary intervention. Methods: Chi-square test and covariance analysis(ANCOVA) were conducted to identify the differences in the characteristics and costs according to medical security type of 1,904 patients who underwent coronary intervention in a university hospital from 2011 to 2012. Hierarchical regression analysis was conducted to determine whether the cost affects medical expenses. Results: In the medical aid group, the proportion of women, those without a job, those without a spouse, and those who received hemodialysis was high, length of stay was high, patients using the emergency room and those who died was high. The medical aid patients were significantly higher in the non-benefit medical expenses, optional medical expenses, physician and admission, meals, medications and injections. National health insurance patients were significantly higher in procedure. The medical security type was found to be significant as a variable affecting the medical expenses. Conclusions: Provision of medical expenses should be managed in advance by providing prevention and education services for the vulnerable, and care services in the region should be provided to suppress the occurrence of medical expenses due to the increase in the number of days spent. In addition, it is necessary to support medical expenses to prevent unsatisfactory medical services from occurring for non-benefit and optional care.

Dynamic Model Considering the Biases in SP Panel data (SP 패널데이터의 Bias를 고려한 동적모델)

  • 남궁문;성수련;최기주;이백진
    • Journal of Korean Society of Transportation
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    • v.18 no.6
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    • pp.63-75
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    • 2000
  • Stated Preference (SP) data has been regarded as more useful than Revealed Preference (RP) data, because researchers can investigate the respondents\` Preference and attitude for a traffic condition or a new traffic system by using the SP data. However, the SP data has two bias: the first one is the bias inherent in SP data and the latter one is the attrition bias in SP panel data. If the biases do not corrected, the choice model using SP data may predict a erroneous future demand. In this Paper, six route choice models are constructed to deal with the SP biases, and. these six models are classified into cross-sectional models (model I∼IH) and dynamic models (model IV∼VI) From the six models. some remarkable results are obtained. The cross-sectional model that incorporate RP choice results of responders with SP cross-sectional model can correct the biases inherent in SP data, and also the dynamic models can consider the temporal variations of the effectiveness of state dependence in SP responses by assuming a simple exponential function of the state dependence. WESML method that use the estimated attrition probability is also adopted to correct the attrition bias in SP Panel data. The results can be contributed to the dynamic modeling of SP Panel data and also useful to predict more exact demand.

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A numerical study on the fatigue evaluation of mark-III LNG primary barrier (수치해석을 이용한 Mark-III LNG 1차 방벽에 대한 피로 평가)

  • Kwon, Sun-Beom;Kim, Myung-Sung;Lee, Jae-Myung
    • Journal of Advanced Marine Engineering and Technology
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    • v.41 no.4
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    • pp.337-344
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    • 2017
  • The demand of liquified natural gas is increasing due to environmental issues. This reason has resulted in increasing the capacity of liquified natural gas cargo tank. The Mark-III type primary barrier directly contacts liquified natural gas. Also, the primary barrier is under various loading conditions such as weight of liquified natural gas and sloshing loads. During a ship operation, various loads can cause fatigue failure. Therefore, the fatigue life prediction should be evaluated to prevent leakage of liquified natural gas. In the present study, the fatigue analysis of insulation system including primary barrier is performed using a finite element model. The fatigue life of primary barrier is carried out using a numerical study. The value of principle stress and the location of maximum principle stress range are calculated, and the fatigue life is evaluated. In addition, the effects on the insulation panel status and the arrangement of knot or corrugation are analyzed by comparing the fatigue life of various models. The insulation system which has best structural performance of primary barrier was selected to ensure structural integrity in fatigue assessment. These results can be used as a design guideline and a fundamental study for the fatigue assessment of primary barrier.