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강접골조-전단벽구조의 수평변위 제어를 위한 재분배기법의 정식화
서지현,박효선 대한건축학회 1999 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.19 No.2
The rigid frame-shear wall building system is one of the most popular lateral force resisting system for tall buildings, Due to the interaction of rigid frame and shear wall, drift design of the rigid frame-shear wall buildings is much more complex than simple lateral load resisting systems. More practical algorithm has been reported on the control process of the lateral displacement of the rigid frame-shear wall buildings. In this paper, three resizing methods for drift design of rigid frame-shear wall buildings are formulated in the form of optimization problems. Based on the resizing method the drift design processes are presented and applied to drift design of a 30-story building. As demonstrated in the example, the efficiency and performance of resizing methods are tested by comparing distribution of lateral displacements along the height of the building.
서지현,김인준,서지훈,형건우,김영식,김영관 한국정보디스플레이학회 2008 Journal of information display Vol.9 No.2
We report on white organic light-emitting diodes (WOLEDs) based on single white dopants, Ir(pq)2(F2-ppy) and Ir(F2-ppy)2(pq), where F2-ppy and pq are 2-(2,4-difluorophenyl) pyridine and 2-phenylquinoline, respectively. The similar phospho-rescent lifetime of two ligands lead to luminescence emission in two ligands simultaneously. However, the emission color of the devices was reddish, because the energy was not transferred efficiently from the 4,4,N,N’-dicarbazolebiphenyl (CBP) to the F2-ppy ligand, due to the small band gap of the CBP. Accordingly, we used 1,4-phenylenesis(triphenylsilane) (UGH2) with a large band gap, instead of CBP as the host material. As a result, it was possible to adjust the emission color by the host material. The luminous efficiency of the device with Ir(F2-ppy)2(pq) doped in UGH2 was about 11 cd/A at 0.06 cd/㎡.
The Effect of the Chance of a Distractor Capturing Attention on Distractor Interference
서지현,조양석 한국인지및생물심리학회 2013 한국심리학회지 인지 및 생물 Vol.25 No.3
It has been suggested that the perceptual load induced by varying display set size is confounded with the dilution among nontarget stimuli. A flanker compatibility task was conducted to examine the nature of dilution. In Experiments 1 and 2, a target letter was presented at fixation with three or six task-irrelevant flanking letters surrounding it. Distractor interference was modulated by the number of the distracting letters in Experiment 1 and the ratio of the number of the distracting letters to the total number of the flanking letters in Experiment 2. When seven different letters were presented as a target, distracting letters, and neutral letters in Experiment 3, the number of the distracting letters modulated distractor interference. These findings are inconsistent with Tsal and Benoni’s (2010) idea that dilution is due to perceptual interference in the preattentive processing stage, as well as Lavie’s (1995) perceptual load theory. We argue that distractor interference is modulated by the probability of a distractor capturing focused attention.
감마선 조사된 난백을 함유한 케이크의 계란 알러지원성 측정
서지현,이주운,김재훈,이유석,변명우 한국축산식품학회 2004 심포지움 및 학술발표회 Vol.- No.33
본 연구는 알레르기 저감화 식품을 개발하기 위한 실용화 방법의 일환으로 실시되었다. 계란으로부터 난백을 분리하여 감마선을 10 및 20 kGy로 조사한 후 케이크를 만들어 알러지원성을 측정하였다. 감마선 조사된 난백으로 만든 케이크에서 추출된 단백질은 전기영동을 통해 확인하였으며 각 시료에 대한 알러지원성은 계란 알레르기가 있는 환자의 혈청을 사용하여 측정한 결과, 난백에 대한 조사 선량이 증가할수록 알러지원성이 감소하는 것을 확인할 수 있었다. 이상의 결과로 볼 때, 감마선 조사된 난백으로 만든 케이크는 대조구에 비해 알러지원성을 감소시킬 수 있었으며 방사선 조사를 통해 알레르기가 저감화된 식품을 개발할 수 있을 것으로 보인다.
서지현 한국라틴아메리카학회 2015 라틴아메리카연구 Vol.28 No.3
This article aims to examine one of the most prominent socio-environmental conflicts against the large-scale mining projects by the multinational capital in the Peruvian northern highlands, Yanacocha’s Conga mining project in Cajamarca. In particular, the spatial focus of this article demonstrates how neoliberal spaces of capitalist accumulation have been uncovered in the multi-sited contestation expressed by local communities against the project. In other words, the article describes how the power asymmetry between the multinational capital and the state on the one hand, and local communities on the other, has been disclosed in converging spaces of capitalist accumulation and the contestation of local communities. The power asymmetry is revealed by looking at the spatial relationship between the new mineral extraction and local contestation in neoliberal Peru.
기후위기 시대 전환 담론과 추출주의의 딜레마: 에콰도르 북부 아마존의 사례
서지현 경희대학교(국제캠퍼스) 국제지역연구원 2022 아태연구 Vol.29 No.4
최근 기후위기와 관련해 국내외에서 활발하게 전개되고 있는 전환 논의는 그동안의 발전 방식(혹은 모델)의 전환에 주목하고 있다. 본 연구는 이러한 논의를 우리나라보다 먼저, 그리고 적극적으로 진행해온 라틴아메리카의 에콰도르 사례에 주목한다. 특히 1990년대 이후 원주민 운동을 중심으로 천연자원 개발에 근거한 주류 발전 방식에 대한 전환 담론으로 ‘부엔 비비르(Buen Vivir)’ 담론이 형성되었다. 이후 라틴아메리카에서 주류 발전 모델에 대한 다양한 대안을 포괄하는 용어로 발전하였다. 한편, 에콰도르에서는 2007년 집권에 성공한 라파엘 코레아 정권이 부엔 비비르의 개념에 근거하여 신헌법을 제정하고 다양한 대안 정책을 시행했다. 본 연구는 에콰도르의 부엔 비비르 담론과 그 실천을 에콰도르 북부 아마존의 사례를 중심으로 분석한다. 시민 사회가 탈석유 발전을 부엔 비비르 담론의 급진적 실천안으로 제안했던 반면, 코레아 정권은 현실 정치에서의 다양한 이해관계를 고려한 단계적 실천 과정에서 탈석유 발전과 추출주의 사이의 딜레마를 노정했다. 에콰도르의 전환 담론과 실천 과정에서의 딜레마를 분석함으로써 본 연구는 기후위기 시대 전환에 대한 함의를 도출한다. In recent times, the transition discussions that have been actively developing at home and abroad in relation to the climate crisis are focusing on the transformation (or transition) of the development model. This study focuses on the case of Ecuador in Latin America, which has been actively pursuing these discussions before our country. Since the 1990s, the Buen Vivir discourse has been formed by indigenous movement as a transition discourse, distancing from the mainstream development model based on extractivism. It has since evolved into an umbrella term in Latin America that encompasses various alternatives to the mainstream model of development. Meanwhile, in Ecuador, the regime of Rafael Correa, which came to power in 2007, drafted a new constitution based on the concept of Buen Vivir and implemented various alternative policies. This study analyses the Buen Vivir discourse and its practice in Ecuador, focusing on the case of the northern Ecuadorian Amazon. While civil society proposed Post-oil development as a radical practice of the Buen Vivir discourse, the Correa regime faced the dilemma between Post-oil development and extractivism in a phased process of action that took into account the various interests of realpolitik. By analysing the dilemmas in Ecuador’s transition discourse and practice, this study draws implications for transition in the era of climate crisis.