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        검색결과 5

        1.
        2019.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        한국산 둥글장수풍뎅이(Pentodon quadridens bidentulus)의 3령 유충과 번데기의 형태를 처음 기술한다. 서식지와 실험실 사육에서 둥글장수 풍뎅이의 생태, 분포, 생활사 또한 제공한다.
        4,000원
        2.
        2019.04 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        본 논문은 공학적방벽시스템의 THM 복합거동을 분석하기 위해 구축한 In-DEBS를 실제 운영하며 취득한 운영 초기 100일간의 현장데이터에 대해 살펴보고자 한다. 콘크리트로 플러깅을 한 In-DEBS 상부에서는 콘크리트가 양생하는 동안 열을 발생하게 되어 In-DEBS의 완충재 및 근계암반에 영향을 미치게 된다. 콘크리트 플러깅에서 멀어질수록 완충재 및 근계암반의 온도는 점점 감소하게 되는데, 이러한 현상을 이용하여 센서 및 계측 시스템을 검증하였다. 처분용기를 모사한 히터는 온도제어를 통해 용기 표면 온도를 100℃로 유지할 수 있도록 설정하였으며, 시스템의 안전을 위해 일주일 동안 서서히 목표온도까지 올렸다. 히터 가동 직후 완충재의 온도는 약 4일 만에 정상상태에 도달하였으며, 상대습도는 증가하였다가 일정시간이 지난 뒤에 서서히 감소하는 것을 관찰할 수 있었다. 또한 지하수 포화에 따른 팽윤에 의해 완충재의 압력이 증가하는 것을 볼 수 있었다. 근계암반에서는 히터 가동 후 온도가 계속 증가하며, 암반의 변위도 계속 증가하는 것을 관찰할 수 있었다.
        4,800원
        3.
        2016.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study is to produce the auxiliary fuel additives that will improve the heat value and reduce the odor of dried sewage sludge, an auxiliary fuel for power plants using process by-products. Through an odor analysis prior to the production of auxiliary fuel additives, it was confirmed that the main odor materials are Methylmercaptan, Acetaldehyde and Trimethylamine. Based on this, we measured the heating value on various processes by-products such as by-products of thermal power generation and by-products of refinery. In addition, the adsorption performance in the major odor material was evaluated. However, for Trimethylamine, it is very difficult to secure the reproducibility of the concentration of the standard materials as the standard material is liquid. Therefore, it was used Ammonia, which has basic property, to replace Trimethyamine. In the evaluation of various process by-products, the highest heating value in heavy oil fly ash was 5,575 kcal/kg, while in the adsorption performance evaluation, FCC was shown as having the best performance in adsorption, as it could adsorb 100% of Methylmercaptan, 47% of Acetaldehyde and 76% of Ammonia. We conducted an adsorption experiment after supporting a transition metal on the FCC in order to improve the adsorption capacity. As a result, it was confirmed the best efficiency when supporting the copper nitrate 0.5% on the FCC. Based on this result, the experiment was conducted to determine the optimal mixing ratio with a high heating value and odor reducing function using Heavy oil fly ash and FCC. The optimal mixing ratio was 90% of Heavy oil fly ash and 10% of FCC. Furthermore, it was found that the most economical performance and highest odor reducing efficiency was achieved when the mixing ratio was 90% of dried sewage sludge and 10% of auxiliary fuel additives.
        4,200원
        5.
        2020.04 서비스 종료(열람 제한)
        Sport activities of the local residents are admitted as a positive and awarding welfare. This study reviews the current status of and the way to activate life sport program on the policy level that would bring a number of effects. By reviewing related-literature review, this study presents theoretical and practical foundation regarding on the necessity for the local social welfare, organization operation, facilities, participation, leadership, and program management. Finally, the authors suggest policies for life sport development on local level below. First, in order to the function of sport for all in social welfare system, it is needed to pursue institutional changes to secure diversity in the age group which participates in sports for all. Second, connectivity in public sports facilities should be fortified. The government should develop sports program in conjunction with public sports facilities built for the interest of community members. Third, club advisors should be educated with well organized-manual and reeducated to rebuild their capacity to develop the programs and manage them if necessary. In the similar view, the policy which can check the advisor’s field experience and ability should be prepared. Fourth, for economic sustainability, a profit generating project developing a target marketing strategy is required.