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        검색결과 244

        23.
        2021.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        육상풍력의 보급이 지연되는 가장 큰 원인인 입지애로 문제를 해결하기 위해 육상풍력 사업성 사전 검토 단계에서 입지적 합성을 검토할 수 있도록 육상풍력 입지지도가 개발되었다. 본 연구에서는 육상풍력 입지지도 고도화의 일환으로 산업부, 환경부, 산 림청의 부처간 협의에 따라 풍력자원, 생태·환경 입지요인 24종, 산림 입지요인 21종을 통합하여 육상풍력 입지 적합성을 종합적으로 평가할 수 있는 고려대상 지역 지도를 개발하였다. 고려대상 지역 지도를 분석한 결과 환경·산림 입지 적합성이 모두 상(high)이고 경제성이 확보되는 지역은 조사대상 면적의 4%인 4,032km2로 산정되었으며, 고려대상 지역의 민감도 분석에 의하면 생태·자연도 1등급 및 2등급과 겨울철 조류동시센서스 조사지역의 민감도가 가장 큰 것으로 확인하였다. 이를 통해 육상풍력 입지의 사전 검토를 위한 고려대상 지역 지도의 실효성을 확인하였다.
        4,000원
        26.
        2021.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In the past, measures for the reduction of industrial accidents has led the safety and health policy of construction sites by the guidance, supervision and the regulation according to「Occupation Safety and Health Act」handled by Ministry of Employment and Labor (MOEL). Nowadays companies realize that due to the factors such as diversification of employment types, outsourcing of hazardous work, new construction method and complicated types of construction, etc., there is a limit on safety management for construction sites as far as it is passively led by the governmental safety management policy and regulation. In this study, in order to practice the autonomous safety management escaping from the government-led safety management, improvement plans are proposed and applied by analyzing the basic cause of the all kinds of fall accidents that could possibly occur in the apartment construction sites and by verifying the hazardous factors and risks by fields.
        4,000원
        27.
        2020.12 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        We determine the observing sites for eclipses of large magnitude recorded in ancient Chinese chronicles from 200 BCE to 900 CE, by adopting the difference between terrestrial time and universal time, ΔT, given by Morrison & Stephenson (2004). The records of solar eclipses with large magnitude are divided into four groups in accordance with the historical variations of the capital cities of ancient Chinese dynasties. We determine areas in which all the eclipses in each group, with an eclipse magnitude larger than a certain threshold value, could be observed. We fi nd that these areas coincide with the historical capitals, which agrees with the general idea that the solar eclipses were observed at the capital of each dynasty. This result also veri es the ΔT values during the period from 100 BCE to 400 CE, during which historical records of eclipses are so rare that the ΔT values can only be obtained by interpolating the long-term data. Moreover, we show that the eclipses described by the term Ji in East-Asian history are not all total eclipses; their mean magnitude is 0:96 ± 0:04. We fi nd that complementary expressions, such as dark daytime and appearance of stars during the eclipse, strengthen the possibility that eclipses described by the term Ji were total. We also provide quantitative definitions for expressions such as `being not complete and like a hook', `being almost complete', `visibility of stars during the eclipse', and `darkness during an eclipse.' The literal meanings of these expressions are in agreement with the recent physical modeling of sky brightness during total eclipses provided by K¨onnen & Hinz (2008).
        4,600원
        33.
        2020.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Equine follicle stimulating hormone receptor (eFSHR) has a large extracellular domain and an intracellular domain containing approximately 10 phosphorylation sites within the G protein-coupled receptor. This study was conducted to analyze the function of phosphorylation sties at the eFSHR C-terminal region. We constructed a mutant of eFSHR, in which the C-terminal cytoplasmic tail was truncated at residue 641 (eFSHR-t641). This removed 10 potential phosphorylation sites from the C-terminal region of the intracellular loop. The eFSHR-wild type (eFSHR-wt) and eFSHR-t641 cDNAs were subcloned into the pCMV-ARMS1-PK2 expression vector. These plasmids were transfected into PathHunter CHO-K1 Parental cells expressing β-arrestin 2 enzyme acceptor fusion protein and analyzed for agonist-induced cAMP response. The cAMP response in cells expressing eFSHR-t641 was lower than the response in cells expressing eFSHR-wt. EC50 values of eFSHR-wt and eFSHR-t641 were 1079 ng/mL and 1834 ng/mL, respectively. eFSHR-t641 was approximately 0.58-fold compared with that of eFSHR-wt. The maximal response in eFSHR-wt and eFSHR-t641 was 24.7 nM and 16.7 nM, respectively. The Rmax value of phosphorylation sites in eFSHR-t641 was also decreased to approximately 68.4% of that in eFSHR-wt. The collective data implicate that the phosphorylation sites in the eFSHR C-terminal region have a pivotal role in signal transduction in PathHunter CHO-K1 cells, and indicate that β-arrestin is involved in coupling the activated receptors to the internalization system.
        4,000원
        35.
        2020.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        PURPOSES : The purpose of this study is to evaluate the structural effects of subbase materials and surface layer thickness obtained from different sites. METHODS : Using a falling weight deflectometer, structural indexes such as SM(r), surface curvature index, base damage index, base curvature index, and AREA, were determined and compared with those of the control section. The back-elastic moduli for each layer were evaluated using the BALM program, and the tensile and compressive strains were analyzed using the KENLAYER program. The damage analysis was conducted to determine both the permanent deformation and fatigue cracking under repeated loading. RESULTS : Increasing the surface layer can improve the elastic moduli of the construction section and compensate for the inclusion of different percent finer within 5% in the subbase layer. CONCLUSIONS : The structural effect of adding 5% of 50 m/m aggregate can be compensated for by increasing the thickness of the surface layer.
        4,000원
        36.
        2019.12 구독 인증기관 무료, 개인회원 유료
        The study aims to assess the use of social networking sites among Educational Technology (Edtech) students of Philippine Normal University Visayas. Descriptive method was used. A total of 95 respondents participated, 27 were males and 68 were females. The statistics used were: frequency, percentage weighted mean, and rank. The top three uses of social networking in the personal life of the respondents according to rank are: 1) to connect with people, 2) to do research, and 3) to e-mail people. With regard to its use in their academic life, the top three are: 1) to do research, 2) to e-mail, and 3) to connect with people. The social networking sites which ranked number one as being used by the respondents are Google for research, Yahoo for e-mail, Facebook for connecting with people and OLX for purchasing. The study disclosed that the respondents “agree” with the benefits of social networking. It was concluded based on the findings of the study that there are social networking sites used to a high extent by the respondents. However, they are limited only to Facebook, Google and Yahoo. The foremost use of social networking is for researching, chatting and messaging and uploading and downloading. Furthermore, it was concluded that the respondents are aware that social networking has both benefits and risks. The researcher recommends the following: the students should be given trainings and workshops on the effective use of social networking; the teachers should monitor the social networking done by their students for purposes of proper guidance and information.
        4,200원
        37.
        2019.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구의 목적은 적지적수 판단에 있어 최근 분류 예측에 활용되고 있는 랜덤포레스트 기법의 적용 가능성을 살펴보는데 있다. 즉, 수종별 조림 적지 판단에 있어 랜덤포레스트 기법을 소개하고 적지적수 도를 작성하여 적용성을 판단하고자 한다. 그 결과 랜덤포레스트 기법의 예측 정확도는 낙엽송 89.29%, 편백 73.89%로 높은 편으로 나타났다. 변수 중요도는 두 개의 수종 모두 표고, 경사, 방위의 순으로 영향력이 높은 것으로 나타났으며 지형, 토성, 토양형이 낮은 영향력을 보였다. 적지적수도 작성 결과, 낙엽송은 경상남도 중부를 제외한 대부분 지역이 가능지와 적지로 나타났으며, 편백은 경상남도의 북동부 지역이 적지로 나타났다. 랜덤포레스트 기법은 적지적수도 작성뿐만 아니라 산림 분야에서 적용되어 왔던 다양한 형태의 분류 및 예측 연구에서 활용 가능성이 높을 것으로 사료된다.
        4,000원
        38.
        2019.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        고고 유적은 집중적 관리를 필요로 하며 끊임없이 새로운 문화콘텐츠를 생산하는 주요 문화 유산이다. 런던 미트라 신전 박물관은 정부 및 민간분야의 협업을 통해 고고유적을 활용한 복합 문화 공간이 되었으며, 문화재의 관리와 활용에 있어 민간의 참여를 장려하는 영국의 전통을 반영한다. 그 협업의 결과로 본래 건축 자재와 복제품으로 복원한 신전 유구에 다양한 시청각적 효과를 더해 관람객들의 상상을 북돋우는 전시실이 만들어졌다. 또한 박물관은 소재지인 월브룩 지역의 로마시대 고고 유물과 함께, 이에서 영감을 받은 예술작품을 전시하고 있다. 무엇보다도 사 기업인 블룸버그가 관리 책임을 맡아서 박물관을 운영하고 있다는 점이 주목된다. 이는 문화유산의 활용에 있어서 민간 분야의 새로운 형태의 협력상을 보여주는 유용한 참고사례가 될 것이다.
        6,000원
        40.
        2019.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This paper is an exploratory study to investigate the influence of characteristics of local government web-sites on user satisfaction and trust. The objective of this research is to identify the characteristics of local government web-sites influencing on user satisfaction and trust, and determine how they affect user satisfaction and trust. From the literature review, we identify four characteristics which are expected to influence on user satisfaction: technical, information, customer-oriented, and work-performing characteristics. In addition, we develop research model that the four characteristics are expected to affect user satisfaction and trust via users’ perceived values. The results of the research are as follows. The technical, customer-oriented, and work-performing characteristics significantly affects perceived values, which significantly affected user satisfaction and trust. Perceived value is partially mediated by user satisfaction in affecting user trust. The characteristics of local government web-sites affecting perceived values differed partially by the purpose of visitor. As for the personal goal, the technical, customer-oriented, and work-performing characteristics significantly affect perceived values, with the technical and customer-oriented characteristics having more significant effects. As for the business goal, the technical, information, work-performing characteristics significantly affected perceived values, with information characteristics having more significant effects.
        4,500원
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