• Title/Summary/Keyword: Civil Society

Search Result 18,071, Processing Time 0.04 seconds

Study on the Legal Issues of New Draft of Civil Aviation Law in China (중국 민용항공법 개정 최근 동향과 주요 법적쟁점)

  • Lee, Hwa
    • The Korean Journal of Air & Space Law and Policy
    • /
    • v.31 no.2
    • /
    • pp.177-214
    • /
    • 2016
  • During more than 20 years of practice, Civil Aviation Law has experienced three times of amendments since it was enacted in 1995. But these revisions are limited to the technical level. The problems and limitations have become increasingly prominent in its implementation. Firstly, the civil aviation law is the result of interests game among several departments and some legal issues was left behind and the regulation was very vague as a result. Secondly, the process of aviation legislation is the process that the country has undergone profound changes and social transformation. The 20 years is long enough for the society to undergo tremendous changes and 1995 version of civil aviation law does not keep pace of development of economy. There was a serious lag between reality and the law. In order to actively promote the development of the aviation industry and overcome implementation issues of the Civil Aviation Law, Civil Aviation Administration of China (CAAC) initiated modification procedure the law and published new draft of Civil Aviation Law in August 2016. The spirit of this modification is to learn and absorb new achievements of domestic and foreign legislation and the International Convention on civil aviation. Furthermore, the purpose of the revision is to provide favorable policy for the development of civil aviation industry and improve aviation safety and supervision, strengthen and protection of consumer rights and interests, to enhance the safety of civil aviation activities, and promote the development of general aviation. This revision concerned to the 78 articles which are revised or deleted and 24 articles added. The highlights of the draft include but not limited to the enhancement of security management, clarification of the main responsibility for production safety. And also it added the provisions related to the construction of effective tracking capability of public air transport enterprises and license system on the transport of dangerous goods. Compared with the existing civil aviation law, the draft has made a great improvements. But there are several deficiencies and limitations in the drafts. These problems need to be supplemented and perfected through further amendments in near future.

Future vision of the Korean society of water and wastewater in water sector (상하수도 미래비젼과 대한상하수도학회의 역할)

  • Kim, Geon-Ha;Hyun, In-Hwan
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.32 no.6
    • /
    • pp.551-557
    • /
    • 2018
  • Since its foundation in September 1986, the Korean Society of Water and Wastewater has made a significant contribution to the water sector in Korea over the past 30 years. The 30th anniversary commemorative committee reviewed the establishment goal of the society and its development strategy for organization and present the "Future Vision of Korean Society of Water and Wastewater" for the next 30 years. The future vision of the society is defined as "Aiming for the healthy life and preservation of the environment through the development of water and wastewater technology and experience". Promotion strategies for implementing the future vision are as follows: 1. Leading water and wastewater technology, 2. Develop water and wastewater policy, 3. Strengthen water and wastewater capacity, 4. Reinforce institutional governance. The driving target to be achieved through the implementation strategy is "To lead the global standards of water and wastewater." We also presented national issue, policy issue, and technical issues in the water sector. Climate change, unified Korea, water safety, and national welfare were selected as national issues related to water and wastewater. This approach was taken from the perspective of policy consumers such as citizens, civil society, experts, and local government/industry. By presenting policy issues and technical issues that address national issues, authors have proposed a future policy direction for the Korean Water and Wastewater Society to make critical contributions to national development.

Drainage and reinforcement of landfill leachate using drain pile (배수파일을 이용한 매립장의 침출수 배수 및 보강)

  • Shin, Joon-Soo;Park, Jun-Boum;Seo, Min-Woo;Yune, Chan-Young;Chung, Choong-Ki
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2003.03a
    • /
    • pp.177-184
    • /
    • 2003
  • 매립장 내의 설치된 중간 복토층(intermediate cover)은 매립 도중 혹은 매립완료 후 종종 침출수가 하부의 침출수 집배수관으로 이동하는 것을 막아 매립장 내에 일정 침출수위를 형성시킨다. 이렇듯 중간 복토층은 침출수의 원활한 순환을 막아 매립장 바닥에 형성되어야 하는 침출수위가 중간복토층 위에 형성되도록 하는데, 이는 매립장의 구조적 안정성을 깨뜨리고 주변으로 침출수 누출을 유발시키게 된다. 본 연구에서는 이처럼 중간복토층 상부에 형성된 침출수위를 저하시키기 위하여, 폐기물 매립시 중간복토층에 투수성이 뛰어나고 역학적 강도와 화학적 내구성을 갖는 배수파일(Drain Pile)을 설치할 것을 제안하였다. 배수파일은 중간복토층 상부에 형성될 수 있는 침출수를 매립장 바닥으로 배수시키고, 침출수 집배수정으로 이송이 가능하게 만든다. 또한 배수파일은 매립장 내부에 설치됨으로써 폐기물의 자체 강성을 증가시키고, 동시에 매립장의 측방유동을 막아 구조적 안정성을 확보하는 효과도 기대할 수 있다. 실내시험을 통해 배수파일 충진재로서 굴패각의 활용가능성을 확인한 결과, 산업 폐기물인 굴패각이 침출수의 pH를 중화시키고 유해물질인 NH$_{4}$$^{+}$를 제거하는데 효과적임을 확인할 수 있었다. 한편, 실제현장의 침출수흐름을 모사하기 위해 범용 프로그램(SEEP/W)을 이용하여 매립지 내에서 배수 파일의 효과를 확인하였다.

  • PDF

A Study on the Shear Behaviors of Geosynthetic-soil Interface in the Waste Landfill Site (폐기물 매립장 차수시설 접촉면 전단특성에 관한 연구)

  • Park, Inn-Joon;Kwak, Chang-Won;Park, Jum-Bum;Cho, Jun-Sik
    • Journal of the Korean Geotechnical Society
    • /
    • v.28 no.3
    • /
    • pp.45-54
    • /
    • 2012
  • Various geosynthetics are widely applied to civil structures and waste landfill site for reinforcement and water resistance. The use of geosynthetics inevitably involves the coupled behaviors of different materials which include large displacement and strain-softening behaviors, etc. In this study, the effect of chemical element in the leachate on the interface shear strength under the cyclic loading condition was analyzed. The Multi-purpose Interface Apparatus (M-PIA) has been modified and cyclic direct shear tests have been performed. The submerging period of each specimen is 200 days. Additionally, the Field-Emission Scanning Electronic Microscopy (FIB) analysis has been also performed to induce the reason of the variation of disturbance function and verify the hypothesis on the decay-proof ability of geosynthetics. Consequently, the charateristics of chemical degradation of geosynthetic-soil interface are verified and the variation of the disturbance function is mainly caused by the different type of soil mineral decay, based on the FIB results.

Evaluation of RO Process Feasibility and Membrane Fouling for Wastewater Reuse (하수처리수 재이용을 위한 RO 공정의 타당성 및 막오염 평가)

  • Hong, Keewoong;Lee, Sangyoup;Kim, Changwoo;Boo, Chanhee;Park, Myunggyun;An, Hochul;Hong, Seungkwan
    • Journal of Korean Society on Water Environment
    • /
    • v.26 no.2
    • /
    • pp.289-296
    • /
    • 2010
  • The purpose of this study is to evaluate various pre-treatment methods and proprieties of water quality for wastewater reuse using reverse osmosis (RO) processes. Secondary effluents were sampled from wastewater treatment plants and lab scale pre-treatments and RO filtration test were conducted systematically. Specifically, different types of pre-treatments, such as coagulation, microfiltration and ultrafiltration, were employed to evaluate the removal efficiency of particle and organic matters which may affect the membrane fouling rate. RO process was later added to eliminate trace amounts of remaining organic matters and salt from the raw water for wastewater reclamation. The permeate through the RO process satisfied water quality regulations for industrial water uses. The experimental results showed that the initial fouling tendency differed not only by the feed water properties but also by the membrane characteristics. Membrane fouling was greater for the membranes with large surface roughness, regardless of the hydrophobicity and zeta potentials. Thus both careful consideration of pre-treatment options and proper selection of RO membrane are of paramount importance for an efficient operation of wastewater treatment.

An Experimental Study on the Effects of Bolted Connection Type on the Block Shear Failure (볼트이음방식의 블록전단파괴에 미치는 영향에 대한 실험적 연구)

  • Lee, Chin-Ok;Park, Gyung-Hyeon;Moon, Jiho;Lee, Hak-Eun;Lim, Nam-Hyoung
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.13 no.11
    • /
    • pp.5566-5571
    • /
    • 2012
  • Block shear failure is one of limit states, and demands great caution in designing the tension member or connection joint of steel structures. From many studies and design specification, it is shown that the effect of the bolted connection type on the block shear failure was not considered. In order to investigate the effect of the bolted connection type(bearing type connection and slip critical connection) on the mode/strength of the block shear failure, tensile experiment is conducted in this study. Differences about the failure mode according to the design specification, bearing type connection, and slip critical connection are proposed from the analysis of test results. The variation of the block shear failure strength due to the frictional force in the slip critical connection is also investigated.

Estimation Method of Infiltration Capacity for Assessment of Drainage Capacity II (배수성능 평가를 위한 침투능 산정기법에 관한 연구(II))

  • Jeong, Jisu;Shim, Jeonghoon;Lee, Dong Hyuk;Hwang, Youngcheol;Lee, Seungho
    • Journal of the Korean GEO-environmental Society
    • /
    • v.21 no.12
    • /
    • pp.23-28
    • /
    • 2020
  • As a result of a suite of laboratory tests undertaken to suggest a rational method for the estimation of infiltration capacity, it is found that the infiltration rate tends to increase as the soil unit weight decreases while it tends to increase as the rainfall intensity increases. Comparative analyses for infiltration curves employing the reduction constant of initial infiltration capacity (α coefficient) that was suggested in this study has reasonably captured the time dependent variation of infiltration capacity. Consequently this study has presented an experimental model for the estimation of infiltration capacity to improve the Horton infiltration capacity curve that has been widely used for estimation of the infiltration capacity and amount of infiltration for its application to sandy soils.

Sidestream Deammonification (반류수탈암모니아 공정)

  • Park, Younghyun;Kim, Jeongmi;Choi, Wonyoung;Yu, Jaecheul;Lee, Taeho
    • Journal of Korean Society on Water Environment
    • /
    • v.34 no.1
    • /
    • pp.109-120
    • /
    • 2018
  • Sidestream in domestic wastewater treatment plants contains high concentration of ammonium, which increases nitrogen loading rate in the mainstream. The process for deammonification consisting of partial nitritation-anaerobic ammonium oxidation (ANAMMOX) and heterotrophic denitrification is an economical method of solving this problem. Currently, about 130 full-scale deammonification plants are fully operating around the world, but none is in Korea. In order to transfer the principal information about sidestream deammonification processes to researchers and operators, we summarized basic concepts, processes type, and key influence factors (e.g., concentration of nitrogen compounds, dissolved oxygen (DO), temperature, and pH). This review emphasis on the processes of single-stage sequencing batch reactor (SBR) deammonification, which are widely used as full-scale plants. Since simultaneous processes of partial nitritation, ANAMMOX and heterotrophic denitrification occur in a single reactor, the single-stage SBR deammonification requires appropriate control/monitoring strategies for several operating factors (DO and pH mostly) to achieve efficient and stable operation. In future, AB-process consisting of A-stage (energy harvesting from organics) and B-stage (ammonium removal without organics) will be applied to the wastewater treatment process. Thus, we suggest mainstream deammonification for B-stage connected with the sidestream deammonification as seeding source of ANAMMOX. We expect that many researchers will become more interested in the sidestream deammonification.

Developing a Method for Estimating Urban Environmental Impact Using an Integrated Land Use-Transport Model (토지이용-교통 통합 모형을 활용한 도시 환경 영향 예측 방법론 개발)

  • HU, Hyejung;YANG, Choongheon;YOON, Chunjoo;KIM, Insu;SUNG, Junggon
    • Journal of Korean Society of Transportation
    • /
    • v.33 no.3
    • /
    • pp.294-303
    • /
    • 2015
  • This paper describes a method that can be used for estimating future carbon emissions and environmental effects. To forecast future land use and transportation changes under various low carbon policies, a DELTA and OmniTRANS combination (a land use-transport integrated model) was applied. Appropriate emission estimation methods and dispersion models were selected and applied in the method. It was designed that the estimated emissions from land use and transportation activity as well as the estimated concentrations of air pollutants and comprehensive air quality index (CAI) are presented on a GIS-based map. The prototype was developed for the city of Suwon and the outcome examples were presented in this paper; it demonstrates what kinds of analysis results are presented in this method. It is expected that the developed method will be very useful for decision makers who want to know the effect of environmental policies in cities.

Durability of Alkali-Activated Blast Furnace Slag Concrete: Chloride Ions Diffusion (알칼리 활성 슬래그 콘크리트의 내구성: 콘크리트의 염소이온 확산)

  • Nam, Hong Ki;Kyu, Park Jae;San, Jung Kyu;Hun, Han Sang;Hyun, Kim Jae
    • Journal of the Korean Society of Safety
    • /
    • v.30 no.4
    • /
    • pp.120-127
    • /
    • 2015
  • The aim of the present study is to investigate some characteristics of concrete according to addition of blast furnace slag and alkali-activator dosages. Blast furnace slag was used at 30%, 50% replacement by weight of cement, and liquid sulfur having NaOH additives was chosen as the alkaline activator. In order to evaluate characteristics of blast furnace slag concrete with sulfur alkali activators, compressive strength test, total porosity, chloride ions diffusion coefficient test were performed. The early-compressive strength characteristics of blast furnace slag concrete using a sulufr-alkali activators was compared with those of reference concrete and added 30, 50% blast furnace slag concrete. Also, Blast furnace slag concrete using sulfur-alkali activators enhanced the total porosity, chloride ions diffusion coefficient than two standard concrete. Alkali-activated blast furnace slag concrete was related to total porosity, compressive strength and chloride ions diffusion coefficient each others. As a result, it should be noted that the sulfur-alkali activators can not only solve the demerit of blast furnace slag concrete but also offer the chloride resistance of blast furnace slag concrete using sulfur alkali activators to normal concrete.