• 한국태양에너지학회:학술대회논문집
• /
• 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
• /
• pp.217-221
• /
• 2012

Over the last decade, performances of low temperature fuel cells are substantially improved by developing highly active Pt-M alloy catalysts. The electrochemical stability of those catalysts, however, still does not meet the commercial grade for fuel cells to be long-term power sources of electrical vehicles. To unveil a major mechanism causing such weak durability, we extensively utilize ab-initio computations on nano-scale Pt-Co alloy catalysts and analyze thermodynamically the most stable structure as a function of compositional variation. Our results indicate that there is a certain feature governing the particle distribution of a specific alloy element on the nano-scale catalysts, which aggravates the electrochemical degradation.

• 한국실내디자인학회논문집
• /
• 제32호
• /
• pp.13-20
• /
• 2002

This study is purposed to find fundamental characteristics in Grassi's architecture which has architectural principles in architecture itself and in the general frame of the historical facts of architecture. His architectural theories can be explained for rationality, historicity, universality. The method of architectural composition can be divided into urban morphological characteristic and compositional characteristic of architecture. The characteristics of the former are the reconstruction of the urban structure by the readjustment of an urban axis which is based on historical continuity of the city, the open court which is a passage transformed from colonnade that is the historical vernacular type and the respect for the city-line which goes with historical context. The characteristics of the latter are the use transformed of nine square which gives consideration to centrality and typology at the same time and the hierarchic division of the principal space and the subordinate space for the functional typical purpose. This analysis shows that Grassi's architecture is on the base of historical continuity and urban reality and for him architectural work is mental work which conflict with the real world for the reconstruction of the city.

• 건축역사연구
• /
• 제21권6호
• /
• pp.19-34
• /
• 2012

This paper focuses on the spatial analysis of traditional houses in Huizhou during the Ming and Qing period in China. It first reviews the spatial characteristics of the houses in Huizhou. Typical configurations, spatial elements and spatial compositions of the houses are briefly examined. It then discusses how those spatial characteristics are applied to the houses. To do so, the review of existing research and literature on the houses was conducted. For a detailed analysis of the houses, a field survey was performed to collect research materials of the houses and to assess the application of the characteristics in the houses. At times, the plans of the houses were redrawn for a further analysis of the spatial compositions of the houses. Attempts have been made to understand the underlying principles of their spatial organization. For example, Jin (2010) examined the spatial organization of unit plans. Boyd (1989), Berliner (2003) and Dan (2005) similarly categorized the organizational typology of its varying designs. Son(1995) further interpreted the spatial relations of the variety of houses in a comprehensive manner. Nevertheless, their analytic methodology falls short of a complete explanation of the spatial expansion and transformation in the houses. Therefore, this paper examines the basic principles behind the spatial expansion and transformation of a variety of traditional houses in Huizhou. In doing so, it strives to make logical sense of design variations in the houses and reveal the theory behind them.

• 영어영문학
• /
• 제57권5호
• /
• pp.701-725
• /
• 2011

This paper attempts to read "The Nightingale" as an experimental proponent of Lyrical Ballads of 1798, one that inaugurated British Romanticism. It is never accidental for this poem to come to replace "Lewti" at the last moment of publication and to be tied to the poetic principles manifested in the "Advertisement" of the 1798 volume. The speaker of this poem, for example, is an ordinary man, who presents himself as a friend and a loving father. Opting for conversational styles rather than blindly copying literary conceits, he even incorporates an evening episode he happens to recall into a legitimate subject matter. The notion of "conversation," which appears in the subtitle, offers a key to figuring out the ideal of poetic language, the figure of the poet, and compositional procedures Coleridge and Wordsworth proposed in their collaborative project. "The Nightingale" can be a dubious, if not totally failed, poetical journey to subverting an incidence of misnaming acts. He finally reaches the limits of poetic figuration in a process of textualizing nature. The leitmotif of "In nature there is nothing melancholy" testifies to the fact that the bird nightingale, which the narrator is hard at work to rename as a joyous bird, is nothing but a poetic metaphor. "The Nightingale" is more likely to be a revisional, regenerative performance based on the strategy of conversation than an embodiment of a daring novelty.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
• /
• pp.228.2-228.2
• /
• 2015

We have developed a TOF-MEIS system using 70~100 keV He+. A TOF-MEIS system was designed and constructed to minimize the ion beam damage effect by utilizing a pulsed ion beam with a pulse width < 1 ns and a TOF delay-line-detector with an 120 mm diameter and a time resolution of 180 ps. The TOF-MEIS is an useful tool for interfacial analysis of the composition and structure of nano and bio systems. Our recent applications are reported. We investigated the effect with Polyaspartic Acid (pAsp) and Osteocalcin on the initial bone growth of calcium hydroxyl appatite on a carboxyl terminated surface. When pAsp is not added to the self-assembled monolayers of Ca 2mM with Phosphate 1.2 mM, the growth procedure of calcium hydroxyl appatite cannot be monitored due to its rapid growth. When pAsp is added to the SAMs, the initial grow stage of the Ca-P can be monitored so that the chemical composition and their nucleus size can be analyzed. Firstly discovered the existence of 1-nm-sized abnormal calcium-rich clusters (Ca/P ~ 3) comprised of three calcium ions and one phosphate ion. First-principles studies demonstrated that the clusters can be stabilized through the passivation of the non-collagenous-protein mimicking carboxyl-ligands, and it progressively changes their compositional ratio toward that of a bulk phase (Ca/P~1.67) with a concurrent increase in their size to ~2 nm. Moreover, we found that the stoichiometry of the clusters and their growth behavior can be directed by the surrounding proteins, such as osteocalcin.

• 한국식품저장유통학회지
• /
• 제13권2호
• /
• pp.259-268
• /
• 2006

우리나라의 전통 밑반찬류에 대한 재료 및 가공에 대하여 보존적 burdle의 특성을 파악한 결과 첫째는 밑반찬에 사용되는 재료들에서 1차적인 hurdle이 적용되고, 2차로 양념류에서 burdle이 적용되어 저장성과 안전성을 부여하고 있다. 둘째는 조리과정에서 삶고, 데치고, 끊이고, 볶고, 튀기는 공정을 거침으로써 수분활성도 및 pH를 조절하여 보존성을 향상 시킬 수 있는 것으로 나타났다. 대부분의 밑반찬들의 염 농도는 $1{\sim}5%$범위를 가지고 있으며, 장아찌 종류를 제외한 채소류를 이용한 무침과 나물에서 약간 높은 염 농도를 보이고 있다. pH는 pH $4.7{\sim}6.4$범위 이며, 장아찌와 절임류 보다는 조림, 볶음, 무침, 나물이 높은 pH를 유지하였다. 가용성 고형물 함량은 조림과 볶음의 경우 $40\;^{\circ}Bx$ 이상을 나타내고 있으나 무침과 나물 그리고 장아찌, 절임의 겨우는 낮은 값을 보이고 있다. 수분활성도는 나물의 경우 $0.93{\sim}0.95$이고, 강낭콩조림과 생선조림의 경우 $0.77{\sim}0.88$ 이다. 총균수는 조리과정에서 튀김 또는 데치기를 거친 반찬의 경우 $10^2-10^4cfu/g$과 같이 낮은 수준 이었으나 장아찌와 무침의 경우는 $10^5cfu/g$이상의 균수를 나타내고 있다. 우리나라 전통 밑반찬들의 보존 hurdle은 사용하는 재료들의 배합 비율과 삶기, 데치기, 볶기 등의 조리과정에 의해 수분활성도, pH 그리고 염 농도를 조절함으로서 보존상태를 높일 수 있는 것으로 확인되었다.

• 공연문화연구
• /
• 제22호
• /
• pp.93-121
• /
• 2011

이 글은 서울지역에서 행해지는 진오기굿의 구성 원리를 도출하고 이를 바탕으로 의미를 규명한 글이다. 진오기굿은 신과 인간이 복합적으로 연결되어 있으면서, 이승과 저승이 혼재되어 있는 세계이고, 인간의 세계에 있던 망자가 신의 세계로 들어가는 과정을 보여주는 의례이다. 진오기굿은 망자를 저승으로 인도하는 과정을 차례로 보여준다. 먼저 신 중심의 거리가 연행되는데, 신이 어떤 과정을 통해 망자를 저승으로 인도할지를 보여준다. 다음으로는 신과 인간이 중심이 되는 거리로 사자를 따라 저승으로 가는 망자의 모습을 보다 구체적으로 보여준다. 마지막으로 인간 중심의 구조로 인간이 어떻게 저승으로 들어가는지를 보여준다. 이러한 반복을 통해 망자가 마침내 저승에 좌정했음을 드러낸다. 신 중심의 굿거리가 신과 인간의 만남을 거쳐 인간 중심으로 연행되는 것이 진오기굿 후반부 저승굿의 짜임이다. <도령돌기> 이후에 연행되는 <베가르기>, <뒷영실>은 망자가 온전하게 저승에 들어갔음을 확인하는 의례이다. 베를 갈라 망자가 저승으로 들어가는 것이 완벽하게 이루어졌음을 보여주고, <뒷영실>에서 망자는 다시 한 번 굿청에 들어와 굿을 해 준 것에 대한 감사함과 함께 죽음의 세계에 안착했음을 알려준다. 저승에 좌정한 조상신에게 비로소 제사를 올리는 <상식거리>는 진오기굿을 통해 인간이었던 망자가 조상신으로 변화했음을 알려준다. 진오기굿은 갑작스러운 죽음을 겪은 재가집을 위로해주는 기능도 수행한다. 재가집의 위로를 위해 가장 필요한 것은 망자가 무사히 저승으로 갔음을 보여주는 것이다. 진오기굿은 그러한 과정을 삼중구조를 통해 보여준다. 신들의 세계에서 망자가 어떻게 천도될 것인가를 보여주고, 저승에서 이승으로 나온 사재를 따라 망자가 무사히 저승으로 들어감을 보여준다. 다시 바리공주 뒤를 따라 저승으로 들어가는 망자의 모습을 보여주어 남은 가족의 마음을 달래준다.