• Title/Summary/Keyword: environmental controls

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Association of asthma with $\beta$2-adrenergic receptor gene, Epoxide Hydrolase gene and CD14 gene polymorphism in Korean population

  • Kwon, Seul-ah;Lee, Young-Jun;Lee, Ra mi;Jung, Hyun-Sook;Song, Joo-Young;Chung, Hai-Won
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2002.11b
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    • pp.177-177
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    • 2002
  • In order to investigate the association of genetic factor with asthma and contribution of the genetic interactions to the incidence of asthma in Korean population, the genetic polymorphisms of Epoxide Hydrolase(EH), CD14 and ${\beta}$2-adrenergic receptor genese(${\beta}$2AR) among 33 asthma patients and 66 controls were examined.(omitted)

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Flow Computation of a Satellite Thruster (인공위성 추력기의 유동 해석)

  • Kwon, Soon-Duk;Kim, Sung-Cho;Kim, Jeong-Soo;Choi, Jong-Wook;Park, Jeong
    • 한국가시화정보학회:학술대회논문집
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    • 2006.12a
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    • pp.145-148
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    • 2006
  • In order to design a micro-thruster which controls the altitude of a space vehicle for a very long lifetime, the flow field should be analyzed considering the nozzle geometry and the difference between stagnation and environmental pressures and so on. This paper describes the axisymmetric non-reacted computational results which were carried out to understand the basic flow phenomena according to the high nozzle pressure ratio. The area ratio is about 56 and the diameter of a nozzle exit is about 0.46 inch. The Mach cell and waves are predicted well.

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PATHOLOGICAL STUDIES ON THE CHRONIC TOXICITY OF METHAMPHETAMINE ADMINISTRATION

  • Rim, Byung-Moo;Cho, Gye-Myung;Chang, Jae-Hong
    • Toxicological Research
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    • v.9 no.2
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    • pp.233-240
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    • 1993
  • Toxic effects of chronic adminstration of methamphetamine (MA) to SD rats were studied in respect to histopathological changes induced in each organ. In experimental groups liver weight decreased and brain weights increased markedly compared with controls in the 12th month after subcutaneous injection of 0.5 mg and 5mg/kg/BW MA. Serum alkaline phosphotase levels increased, but marked decrease of cholesterol, triglyceride, and BUN levels were checked depending on both the dose of MA and duration of treatment.

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Remote Control of Pumping System for Underground Water Pollution and Running Dry Prevention Using Ubiquitous (유비쿼터스를 이용한 지하수 오염과 고갈방지를 위한 펌핑시스템의 원격제어)

  • Tack, Han Ho
    • Journal of Korea Society of Industrial Information Systems
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    • v.18 no.3
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    • pp.9-15
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    • 2013
  • This paper was development of remote controller of pumping system by using ubiquitous for underground water contamination prevention in the area of glasshouse facility. This paper automatically controls from to temperature and humidity for pumping sprinkler at water hanging cultivation. This prevents indiscreetive development of underground water, and prevents damage of environmental pollution without complementary measures in case of water lacked humble-void. The result of this research, confirms decrease of electrical fee, prevention of indiscreet underground water usage and its drying up thought optimum farm products management and pumping control system.

An Experimental Study on the Safety Standard of Electronic Throttle Control System (전자식 가속제어장치 안전기준에 대한 실험적 고찰)

  • Yun, Kyungcheol;Yong, Geejoong
    • Journal of Auto-vehicle Safety Association
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    • v.11 no.1
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    • pp.48-54
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    • 2019
  • Optimal engine control is needed to cope with the global environmental regulations that are globally enforced. For optimum engine control, the electronic throttle control system (ETCS) is a prerequisite. Automotive makers are having an effect on reducing emissions and improving fuel economy by applying ETCS which is designed to secure stability. The ETCS controls the output of the throttle valve by passing the output value of the accelerator position sensor (APS) to the engine control unit (ECU). In this study, the authors investigated the safety standards of domestic and overseas accelerator control system and tried to understand how the air flow control affects the engine output by replacing the throttle. The authors suggest an improvement proposal of safety standard based on the result of driving evaluation by various modes.

Cell Autonomous Circadian Systems and Their Relation to Inflammation

  • Annamneedi, Venkata Prakash;Park, Jun Woo;Lee, Geum Seon;Kang, Tae Jin
    • Biomolecules & Therapeutics
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    • v.29 no.1
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    • pp.31-40
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    • 2021
  • All living beings on earth have an important mechanism of 24-h periodicity, which controls their physiology, metabolism, and behavior. In humans, 24-h periodicity is regulated by the superchiasmatic nucleus (SCN) through external and environmental cues. Peripheral organs demonstrate circadian rhythms and circadian clock functions, and these are also observed in cultured cell lines. Every cell contains a CLOCK: BMAL1 loop for the generation of circadian rhythms. In this review, we focused on cell autonomous circadian rhythms in immune cells, the inflammatory diseases caused by disruption of circadian rhythms in hormones, and the role of clock genes in inflammatory diseases.

DESIGN AND USE OF BUILDING INFORMATION MODELS FOR PREPLANNING COMMERCIAL BUILDING CONSTRUCTION ACTIVITIES

  • Thomas M. Korman
    • International conference on construction engineering and project management
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    • 2013.01a
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    • pp.274-278
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    • 2013
  • Over the past several years, the building codes that govern commercial building construction have become increasingly prescriptive in nature, specifying detailed information related to the design and installation of the systems, while offering no reasoning behind their prescriptive measures. For example, metal stud framing is commonly used in commercial building construction to create bearing walls and non-bearing partition walls. BIM provides a powerful platform for developing and implementing "pre-planning" tools and methods to facilitate both engineering and administrative controls during construction. This paper discusses the use of BIM to enhance constructability for commercial building construction activities, specifically metal stud framing. Using specific real-world examples this paper demonstrates ways that BIM can be used to foresee potential construction issues and motivates and informs future uses of BIM technologies

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Importance of Polar Phytoplankton for the Global Environmental Change (전 지구 환경변화에 대한 극지 식물플랑크톤의 중요성)

  • 강성호;강재신;이상훈;김동선;김동엽
    • Korean Journal of Environmental Biology
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    • v.18 no.1
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    • pp.1-20
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    • 2000
  • There are increasing evidences of climate change in the Antarctic and Arctic Oceans, especially elevated temperature due to the continuous burning of the fossil fuels and ultraviolet B(UV-B) flux within the ozone hole. Light-dependent, temperature-sensitive, and fast-growing organisms respond to these physical and biogeochemical changes. Polar marine phytoplankton, which are pioneer endemic species and important carbon contributors in the polar waters, are therefore highly suitable biological indicators of such changes. By virtue of light requirement, the primary producers are exposed to extreme seasonal fluctuations in temperature, photosynthetically active radiation, and UV radiation. Local environmental warming and increased UV-B radiation during ozone depletion may have profound effects on the primary producers that are primary carbon producers in the polar water. Small changes in climate temperature and solar radiation may have profound effects on the activity threshold of the polar phytoplanktion. To demonstrate biological response to the environmental changes, standardized representative natural and biological parameters are needed so that replicate samples (including controls) can be taken over extended periods of time. In this paper, we review general characteristics of polar phytoplankton, their environment, environmental changes in the polar waters, the effects on the environmental changes to the polar phytoplankton, and the importance of the polar phytoplankton to understand the global environmental changes. [Biological indicators, Global environmental change, Polar phytoplankton, UV].

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How to Reflect Sustainable Development in Overseas Investment including Equator Principles (해외투자(海外投資)와 지속가능발전 원칙 - 적도원칙(赤道原則)(Equator Principles)을 중심으로 -)

  • Park, Whon-Il
    • 한국무역상무학회:학술대회논문집
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    • 2006.06a
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    • pp.45-72
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    • 2006
  • The Equator Principles are a set of voluntary environmental and social guidelines for ethical project finance. These principles commit banks and other signatories to not finance projects that fail to meet these guidelines. The principles were conceived in 2002 on an initiative of the International Finance Corporation and launched in 2003. Since then, dozens of major banks have adopted the Principles, and with these banks among them accounting for more than three quarters of all project loan market volume the Principles have become the de facto standard for all banks and investors on how to deal with potential social and environmental effects of projects to be financed. While regarding the Principles an important initiative, NGOs have criticised the Principles for not producing real changes in financing activities and for allowing projects to go through that should have been screened out by the Principles, such as the Sakhalin-II oil and gas project in Russia. In early 2006, a process of revision of the principles was begun. The Equator Principles state that endorsing banks will only provide loans directly to projects under the following circumstances: - The risk of the project is categorized in accordance with internal guidelines based upon the environmental and social screening criteria of the International Finance Corporation (IFC). - For all medium or high risk projects (Category A and B projects), sponsors complete an Environmental Assessment, the preparation of which must meet certain requirements and satisfactorily address key environmental and social issues. - The Environmental Assessment report addresses baseline environmental and social conditions, requirements under host country laws and regulations, applicable international treaties and agreements, sustainable development and use of renewable natural resources, protection of human health, cultural properties, and biodiversity, including endangered species and sensitive ecosystems, use of dangerous substances, major hazards, occupational health and safety, fire prevention and life safety, socio-economic impacts, land acquisition and land use, involuntary resettlement, impacts on indigenous peoples and communities, cumulative impacts of existing projects, the proposed project, and anticipated future projects, participation of affected parties in the design, review and implementation of the project, consideration of feasible environmentally and socially preferable alternatives, efficient production, delivery and use of energy, pollution prevention and waste minimization, pollution controls (liquid effluents and air emissions) and solid and chemical waste management. - Based on the Environmental Assessment, Equator banks then make agreements with their clients on how they mitigate, monitor and manage those risks through an 'Environmental Management Plan'. Compliance with the plan is required in the covenant. If the borrower doesn't comply with the agreed terms, the bank will take corrective action, which if unsuccessful, could ultimately result in the bank canceling the loan and demanding immediate repayment. - For risky projects, the borrower consults with stakeholders (NGO's and project affected groups) and provides them with information on the risks of the project. - If necessary, an expert is consulted. The Principles only apply to projects over 50 million US dollars, which, according to the Equator Principles website, represent 97% of the total market. In early 2006, the financial institutions behind the Principles launched stakeholder consultations and negotiations aimed at revising the principles. The draft revised principles were met with criticism from NGO stakeholders, who in a joint position paper argued that the draft fails by ignoring the most serious critiques of the principles: a lack of consistent and rigorous implementation.

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Investigation and Evaluation of Algae Removal Technologies Applied in Domestic Rivers and Lakes (국내 하천/호수에 적용된 조류저감기술의 조사 및 평가)

  • Byeon, Kyu Deok;Kim, Ga Young;Lee, Inju;Lee, Saeromi;Park, Jaeroh;Hwang, Taemun;Joo, Jin Chul
    • Journal of Korean Society of Environmental Engineers
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    • v.38 no.7
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    • pp.387-394
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    • 2016
  • Commercial 28 algae removal technologies that have been applied in domestic rivers and lakes with green tide were investigated, analyzed and classified. The classification of algae removal technologies was based on the three criteria (i.e., principle, flow rate of water body, and application period). Also, algae removal technologies were evaluated in terms of cost effectiveness, field applicability, effect durability, and eco friendliness. From the analysis results, technologies using physical, chemical, biological, and convergent controls were 32.2%, 25%, 21.4%, and 21.4%, respectively. The 75% of technologies have been applied to stagnant water body (${\leq}0.2m/s$). Also, algae harvesting ship with dissolved air flotation, conveyor belt and filtration processes and natural floating coagulant were found to have better field applicability, compared to other technologies. However, proper algae removal technology in specific rivers and lakes should be chosen after the evaluation of long-term pilot scale field test. Also, development of energy and resource recovery technologies from algae biomass is warranted.