• The Science & Technology
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• no.5 s.408
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• pp.6-7
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• 2003

뇌, 다른 사람 감정 모방/ '중세가 오늘날 보다 훨씬 더웠다'/ 진통제, 파킨슨병 치료 효과/ 고릴라 · 침팬지, 수십년 내 멸종위기/ 심장병 막으려면 HDL 높여야/ 보톡스, 소아마비 근육이완 효과/ 이집트서 세계 最古 미이라 발견

• Digital Contents
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• no.2 s.129
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• pp.80-85
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• 2004

기존의 대다수 온라인 게임들이‘검과 마법’이라는 중세 판타지식 소재로 대변된다면, RF 온라인은‘화염과 폭발’이라는 현대식 소재로 대변되는 게임이라 할 수 있다. 즉 SF 판타지적 사고에서 접근한 게임이 바로 RF 온라인이다.

• 건강소식
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• v.33 no.12
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• pp.40-43
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• 2009

산타클로스, 오로라와 호수의 나라 핀란드, 핀란드는 고풍스러운 중세와 세련된 현대적인 분위기가 조화를 이루는 도시 헬싱키를 비롯해 산타클로스가 살고 있는 고향이자 북극으로 향하는 길목인 라플란드, 호수가 많은 동부와 발틱해 바다를 끼고 있는 남서부에 이르기까지 아름답고 독특한 매력을 간직하고 있는 곳이다.

• Korean Linguistics
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• v.79
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• pp.63-89
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• 2018

This study explores contrastive relation among voiced bilabial fricative [${\ss}$], voiceless bilabial stop [p] and glide [w] in Middle Korean consonant system based on Probabilistic Model. Preceding researches about voiced bilabial fricative [${\ss}$] proposed two influential arguments. One is voiced bilabial fricative [${\ss}$] was an independent phoneme, the other is it was not an independent phoneme but an allophone of voiceless bilabial stop [p] in Middle Korean. This study applies Probabilistic Phonological Relationship Model (PPRM) for solving the problem of dichotomy about contrastive and allophonic relations. The analysis result of the contrastive entropy by PPRM suggests that voiced bilabial fricative [${\ss}$] was just an allophone of voiceless bilabial stop [p] or glide [w] in Middle Korean. Comparing the entropies between [p] and other consonants with the entropies between [${\ss}$] and other consonants, a continuum defined in terms of entropy reveals that [${\ss}$] in Middle Korean was more allophonic than phonemic.

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.220-233
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• 2019

Hitherto there have been by and large three different approaches to the installation works of Olafur Eliasson; a soma-aethetic, politico-aesthetic and techno-aesthetic. But none of these provides us with the aesthetic descriptions of the light effect. This failure seems to arise from the lack of the conceptual tools suit for describing the atmospheric effect of 'light'. The symbolism of light, or the theological optics of Middle Age may help us to compensate for the lack of appropriate concepts needed for theorizing the effect of light used very frequently by contemporary installation artists. And this medieval aesthetics of light can also of service to elucidate some essential characteristics of the digtal visual culture in general.

• Applied Chemistry for Engineering
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• v.8 no.6
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• pp.1048-1053
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• 1997

Modified mordenites by HF treatement, which have different $SiO_2/Al_2O_3$ ratio, and those mixed with $\gamma$-alumina are prepared and used for catalytic cracking of triphenylmethane(TPM) in micro-activity tester(MAT). Dealumination of mordenites decreased the acid content but developed secondary mesopores. The conversion and the selectivity of benzene over modified mordenites with the mesopores were increased. However, for the further dealuminated mordenites, they decreased due to the destruction of pore structure and low acid amount. Accordingly, the maximum cracking activity and the maximum selectivity of benzene were obtained about 17 $SiO_2/Al_2O_3$ ratio of modified mordenites. The modified mordenites mixed with alumina enhanced the cracking activity of TPM compared with the pure mordenites. It can be explained that TPM is cracked at active sites with in large pores of alumina firstly and further cracked into small molecules in zeolite pores as step mechanism of catalytic cracking.

• Applied Chemistry for Engineering
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• v.7 no.5
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• pp.925-937
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• 1996

Three types of mordenites treated by steaming($SM_{6.5}$), HF solution for $SM_{6.5}(FM_a)$ and HF solutlon+steaming for $SM_{6.5}(FM_b)$ were prepared and used as cracking catalysts of vacuum gas oil. These samples were analysed by XRF and XPS for average and surface Si/Al atomic ratio, XRD for unit cell constants, nitrogen adsorption/desorption for porosity, pyridine-IR for acidic properties. In comparison with three type samples, $SM_{6.5}$ had a lot of acid amount and showed micropore volume mostly(>85% to total volume). Dealuminated $FM_a$, compared with $SM_{6.5}$, was decreased a little in acid amount and improved for porosity. Also, $FM_b$ was decreased further in acid amount and developed in mesopore dramatically. The catalytic activity and the yield of gasoline, kerosine+diesel and branched aromatic over the modified mordenites which have developed mesopore were improved. This is due to limited access of diffusion of large molecules within pore of the modified mordenites.

• Journal for History of Mathematics
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• v.10 no.1
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• pp.33-38
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• 1997

본고는 수학적으로 취급된 Cantor의 무한을 소개하기보다는 그가 가졌던 무한에 대한 태도는 매우 종교적이었고 철학적으로는 실재론적인 입장에 있다는 것을 보이려고 한다. 이를 위해 먼저 Cantor의 초한수론과 무한의 역사를 약술하고 그의 무한관이 기독교 신앙과 중세 철학에 근거해 있음을 제시한다. 또한 Cantor의 초한수론은 당시의 세계관과 시대정신에 도전하고 있음을 밝히려 한다.

• Journal for History of Mathematics
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• v.14 no.2
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• pp.55-60
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• 2001

In this paper we introduce three kinds of theory on the origin of the world, the formation theory, the emanation theory and the creation of nothing. Especially through Augustinus, great scholar of patristic philosophy in the Middle Ages, how the relationship between the God and the creature was shown with the concept of the infinity and the finite.

• Journal for History of Mathematics
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• v.10 no.2
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• pp.64-71
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• 1997

This paper is a sequel to [5]. We investigate a relation between the history of modern western logic and religion. The period from the seventeenth century to the present day is dominated by science; traditional religious beliefs remain important, but are felt to need justification, and are modified wherever science seems to make this imperative.