• Title/Summary/Keyword: Life-cycle assessment

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Reliability Analysis of Axially Loaded Large-scale Pile Foundations (대형말뚝기초의 축하중 거동에 대한 수치해석기반 신뢰성 해석)

  • Huh, Jung-Won;Park, Jae-Hyun;Lee, Ju-Hyung;Ha, Sung-Han;Kwak, Ki-Seok;Chung, Moon-Kyung
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.03a
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    • pp.17-22
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    • 2009
  • Reliability analyses were performed to quantify the risk in axially loaded large-scale pile foundations in consideration of pile-soil interaction and uncertainties on various design variables. The finite difference method based on an equivalent soil spring model and a load transfer method and Monte Carlo simulation method are integrated in the framework of reliabilty analysis. The applicability and efficiency of the proposed method in the safety assessment of axially loaded pile-soil system was verified using a realistic example. Since the proposed method can explicitly consider uncertainties in various design variables, and quantify failure probability of a pile foundation, it can be used to estimate risk, to obtain basic informations for life cycle cost analysis, and to develop code requirements for a reliability-based design of pile foundations.

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A Study on the conditions of the Environment-Conscious Logistics Activity (환경친화적 물류활동의 실태에 관한 연구)

  • Park, Seog-Ha;Kim, Hyun-Soo
    • Journal of the Korea Safety Management & Science
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    • v.10 no.4
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    • pp.229-240
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    • 2008
  • With the effectuation of Kyoto Protocol, one of the important movement throughout the world is reducing the emission of greenhouse gas which is the main reason of making global warming. The actual factor of greenhouse gas is CO2, and in year of 2002 20% of total CO2 emission was produced only through transportation throughout the South Korea. In the contrary, the recycling of municipal wastes in South Korea was 44.0% in 2002, but it will be targeted upto 53.5% in 2011. All of these show environment-conscious logistics should be implemented together throughout the each stage of distribution with the development of product and service. This study applied survey research for the activities affecting to the emission of CO2 and packaging wastes produced from transportation and packaging stages in logistics area. For this, survey questionary was constructed with five specific areas - strategy, transportation & distribution, custody, packaging, and information. Based on the 148 returned survey questionaries, this study analyzed 52 categories and finally suggests necessary modal shift, collaboration & co-operation in logistics, LCA(life-cycle assessment), and other promoting policies for the environment-conscious logistics in effective way.

A Study on the Basic Solution for Sustainable Buildings - Focused on the Interior Materials of Eco-Buildings in Minnesota, USA (지속가능한 건축디자인을 위한 기초방안에 관한 고찰 - 미국 미네소타 주 친환경사례의 실내 건축자재를 중심으로 -)

  • Chun, Jin-Hie
    • Korean Institute of Interior Design Journal
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    • v.15 no.2 s.55
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    • pp.174-182
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    • 2006
  • This study is focused on interior materials and wastes among other diverse environmental strategies for sustainable construction. The case study was carried out by using MSDG, mainly utilized in evaluating performance of sustainable constructions in Minnesota, the US, as an evaluation tool, in order to analyze American practices. In this study, a field inspection was conducted to 6 Minnesota cases, following a preliminary examination through literature study and portal site search, and then, constructive reports, interviews with people in charge, and empirical data including photos were added to the basic data provided by MSDG and MOEA As a result, it turned out *that sustainable materials were mainly used even in newly constructed buildings and wastes were properly managed in an environment-friendly, economical, and ethical manner, *that life cycle assessment showed reduction in some constructive costs even when the basic costs were high, *that some recycled finish materials were widely used in diverse areas, *that minimum consumption of raw materials, minimum environmental damage by materials, minimum effect of materials on IAQ were found in the examined cases, and *that many attempts were made to minimize resource consumption and constructive wastes from diverse perspectives.

A Study on the Adequate Capacity of Substation Transformer for Offshore Wind Farm (해상풍력발전단지의 해상변전소 변압기 적정 용량에 관한 연구)

  • Moon, Won-Sik;Jo, Ara;Huh, Jae-Sun;Bae, In-Su;Kim, Jae-Chul
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.8
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    • pp.83-89
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    • 2015
  • This study suggests the methodology to decide the number and adequate capacity of substation transformer in a large-scale offshore wind farm (OWF). The recent trend in transformer capacity of offshore substation is analyzed in many European offshore wind farm sites prior to entering the studies. In order to carry out the economic evaluation for the transformer capacity we present the cost models which consist of investment, operation, and expected energy not supplied (EENS) cost as well as the probabilistic wind power model of wind energy that combines the wind speed with wind turbine output characteristics for a exact calculation of energy loss cost. Economic assessment includes sensitivity analysis of parameters which could impact the 400-MW OWF: average wind speed, availability, discount rate, energy cost, and life-cycle.

Framework of Security Development Method based on Component (컴포넌트기반 보안개발방법의 프레임워크)

  • Hong, Jin-Keun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.3
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    • pp.926-930
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    • 2010
  • This paper is about a development framework, which is required to develop of security system is based on component. With applying of SDLC(system development life cycle) of information system, the application of information security products DLC is required at this point of time. In this paper, we review NIST requirement specification of development method, requirement criteria of SDLC in each stage, and major security guidelines of risk assessment. Also we are reviewed major security element of SDLC, and to aid understanding of security framework based on component, present the relationship fo security design and DFD in respect of spoofing for the outside entity based on threat tree STRIDE.

Assessment of CO2 Emissions of Eco-friendly Lightweight Form in the Construction Process (시공단계에서의 친환경 경량 거푸집 탄소배출량 평가)

  • Kang, Sin Hun;Ahn, Hee-Jae;Lee, Chang-Su;Lee, Dongmin;Cho, Hunhee;Kang, Kyung-In
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.11a
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    • pp.10-11
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    • 2019
  • The purpose of this study is to validate the environmental performance of the 'eco-friendly lightweight form' in the construction process. Unlike existing euro form and aluminum form, the proposed form does not require form oil during the process of concrete casting and is lightweight because it is made of engineering plastic. Therefore, eco-friendly lightweight form will reduce the $CO_2$ emissions in the construction process. To verify the hypothesis, the study compared existing forms and eco-friendly light weight form's $CO_2$ emissions in each stage in construction process when using 1,000 forms and 100 times from the LCI(Life Cycle Inventory) data. The total $CO_2$ emissions of the eco-friendly light weight form were 30,487kg $CO_2$, which equated to about 58% and 20% less emissions than the euroform and aluminum form. The result of the study verified that the eco-friendly lightweight form was effectively reduced $CO_2$ emission in the construction process.

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Long-Range Water Resources Prediction and Flood Risk Assessment using Climate Information (기후정보 활용 수자원 장기예측 및 중장기 홍수위험도 평가)

  • Yoon, Sunkwon;Choi, Jihyeok;Moon, Young-IL
    • Proceedings of the Korea Water Resources Association Conference
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    • 2018.05a
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    • pp.17-17
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    • 2018
  • 재난발생 위험은 불확실성을 내포하고 있으며, 이러한 불확실성 요인을 줄이고 사전에 소멸시키는 일은 매우 중요한 사항이 될 수 있다. 또한 재난관리 관점에서 그것이 발생했을 때 어떤 식으로 대응할지에 대한 과정이 체계적으로 갖추어져 있어야 하며, 복구 및 재발 방지를 위한 지속적인 노력이 수반될 필요성이 있다. 본 연구에서는 기후정보를 활용한 중장기 수문예측을 실시하고 통합홍수위험평가 시스템 구축을 통한 홍수위험도 분석을 실시하였다. 이를 위하여 우리나라 243개 지자체를 대상으로 홍수관련 위해성, 노출성, 취약성 자료를 수집하여 표준화하였으며, 전문가 Delphi-AHP 설문조사 분석을 통하여 가중치를 적용하고 위험도를 예측 평가하였다. 이러한 중장기 위험 예측 정보는 한 달 또는 수개월 전에 지자체 행정력을 집중 및 분산시키고, 수재해(홍수/가뭄 등) 위험관리 계획 수립이 가능하여 재난관리자에게 유용한 정보로 활용될 수 있을 것이다. 또한 재난의 생애주기(Life Cycle)별 예방, 대비, 대응, 복구 단계에 따라 사전과 사후에 가능한 주요 활동들을 구체화 할 수 있으며, 시간 스케일별 기후예측 정보를 활용한 재난관리 패러다임 전환과 골든타임 확보 등 수자원예측 분야 기술적 진보를 이룰 수 있을 것으로 기대한다. 향후 통계 역학 모형 기반 중 장기 예측 정보의 신뢰도가 향상 된다면 보다 다양한 분야 예측 정보 서비스 및 활용이 가능할 것이다.

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Factors that Affect Remission of Chemotherapy-Induced Peripheral Neuropathy Symptoms: Short-Term Prospective Study

  • Jeong, Gay Suk;Choi, Jin Yi;Choi, Heejung
    • Journal of Korean Biological Nursing Science
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    • v.24 no.2
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    • pp.86-94
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    • 2022
  • Purpose: Patients experiencing chemotherapy-induced peripheral neuropathy (CIPN) apply various palliative care as well as drugs in their daily life to alleviate symptoms. There is a need to identify the influence of these efforts and patients' psychosocial status on the relief of CIPN symptoms. This short-term prospective study investigated how prescription drugs, non-pharmacological behaviors (exercise, massage, and heat therapy), and psychological states (social support, depression, and anxiety) affected CIPN symptoms. Methods: Participants scheduled to receive postoperative platinum or taxane-based chemotherapy were enrolled consecutively. CIPN was measured with the Neurotoxicity-12 subscale of the Functional Assessment of Cancer Therapy/Gynecologic Oncology Group-Neurotoxicity-12 instrument. Data were collected three times during the 4 or 5 cycles of chemotherapy. Results: At the end of the 2nd chemotherapy cycle, 93.1% of participants reported CIPN symptoms. Multiple regression analyses showed that a heat therapy (β= -.34, p< .001), massage (β= -.21, p= .012), and walking 5 times or more per week (β= -.26, p= .021) provided relieve for CIPN symptoms. Depression (β= .19, p= .027) significantly exacerbated CIPN symptoms. Conclusion: These results suggested that a comprehensive management program that includes walking, heat therapy, massage, and mood therapy should be encouraged. Moreover, patients should be educated at chemotherapy initiation to understand appropriate interventions that can relieve CIPN symptoms.

Re-engineering Adult Education Programme-an Online Learning Curricular Perspective

  • Mathai, K.J.;Karaulia, D.S.
    • Journal of Korea Multimedia Society
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    • v.6 no.4
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    • pp.685-697
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    • 2003
  • The Web based multimedia programmes/courses are becoming widely available in recent years. Most of these courses focus on Behaviorist way of learning, which does not promote deep learning in any way. For Adults this approach further incapacitated, as it does not satisfy Andragogical needs. The search for Constructivist way of learning through the web applied to Indian conditions led to need for developing a curriculum development approach that would promote construction of knowledge through web based collaboration. This paper attempts to reengineer existing curriculum development processes and lays out a framework of‘Problem Based Online Learning (PBOL)’curriculum design. In this context, entire curriculum development life cycle is evolved and explained. This is a part of doctoral work (Ph.D), which is in progress and being undertaken by K.James Mathai, and guided of Dr.D.S.Karaulia.

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A case study of CO2 emissions from beef and pork production in South Korea

  • Dawoon Jeong;Young Soon Kim;Soohyun Cho;Inho Hwang
    • Journal of Animal Science and Technology
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    • v.65 no.2
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    • pp.427-440
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    • 2023
  • The current study evaluated carbon dioxide (CO2) emissions from beef and pork production and distribution chains in the South Korean meat industry. Data from industrial example farms and slaughterhouses were assessed on the basis of both the guidelines from the United Kingdom's Publicly Available Specification (PAS) 2050:2011 and the Korea Environmental Industry & Technology Institute carbon footprint calculation. The main factors for our estimations were animal feeds, manure waste, transportation, energy and water, refrigerants, and package data. Our analyses show that 16.55 kg CO2 equivalent (eq) was emitted during the production of 1 kg of live cattle. When retail yields and packing processes were considered, the CO2-eq of 1 kg of packaged Hanwoo beef was 27.86 kg. As for pigs, emissions from 1 kg of live pigs and packaged pork meat were 2.62 and 12.75 kg CO2-eq, respectively. While we gathered data from only two farms and slaughterhouses and our findings can therefore not be extrapolated to all meats produced in the South Korean meat industry, they indicate that manure waste is the greatest factor affecting ultimate CO2 emissions of packaged meats.