• Proceedings of the Korean Magnestics Society Conference
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• 1992.10a
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• pp.38-39
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• 1992

• Proceedings of the PSK Conference
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• 2000.10a
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• pp.240.2-240.2
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• 2000

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.124.2-124.2
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• 2011

천연의 메탄 하이드레이트를 생산하기 위한 방법으로 몇 가지가 알려져 있으나 최근의 연구 결과로는 감압법이 가장 효과적이며 경제성을 확보할 수 있다고 알려져 있다. 하지만 이 방법을 이용한 메탄 하이드레이트 개발생산 시에는 해리된 물과 가스가 동시에 생산유체로 발생하여 수송되며, 생성수에는 하이드레이트 전구체라고 알려진 미완의 하이드레이트 구조체가 남게 된다. 생산유체는 낮은 해수온도에 노출되어 가스 하이드레이트가 쉽게 재생성될 가능성이 높기 때문에 안정적인 가스 생산과 생산시설의 보호를 위해서는 적절한 가스 하이드레이트 재성성 억제대책이 필요하다. Kinetic 억제제의 적용이 많이 이루어지고 있는 가스전에서의 경험을 바탕으로 투여해 보는 시도를 하고 있지만 sII인 천연가스 하이드레이트에서의 억제효과와 비교하여 저하된 결과가 보고되고 있다. sI과 sII는 메커니즘의 차이로 인해 억제제의 성능이 다르게 나타난다. sI인 메탄 하이드레이트에 대하여 kinetic 억제제의 효과를 살펴보았고 이온성액체를 적용한 효과적인 sI 하이드레이트 억제기법을 보고한다. 또한 기존의 sII 억제제와 혼합하여 시너지효과를 얻을 수 있음을 확인하였다.

• East Asian mathematical journal
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• v.39 no.5
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• pp.523-528
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• 2023

Let S_n = [S(i, j)]_1≤i,j≤n and S^*_n = [S(i + j, j)]_1≤i,j≤n where S(i, j) is the Stirling number of the second kind. Choi and Jo [On the determinants of the square-type Stirling matrix and Bell matrix, Int. J. Math. Math. Sci. 2021] obtained the diagonal entries of matrix U in the LU-factorization of S^*_n for calculating the determinant of S^*_n, where L = S_n. In this paper, we compute the all entries of U in the LU-factorization of matrix S^*_n. This implies the identities related to Stirling numbers of both kinds.

• Journal of the Korean Society of Costume
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• v.44
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• pp.5-17
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• 1999

This paper studies women's clothing and textiles recorded in the『the Odes』, and refers research materials on the old commentaries about the『the Odes』and the various kinds of records and remains. The results regarding women's clothing in『the Odes』are follow: 1. Ti-i, Chin-i are the women's ceremonial dresses. Ti-i is a kind of the court dress and the shape is a long dress embroidered with pheasant. Chan-i belongs to the lower grade compared with the six ritual dresses worn by the queen and is made of Hu that is a kind of the white soft-wrinkled fabrics. 2. A women's I-Shang is composed of a blouse and a skirt. It is the classic style before the Sh n-I appears in China. Also we find that they use the standard colours for a blouse and the intermediate colours for a skirt in Chou period. 3. Chiung-I, Chiung-Shang and Hsieh-Pen are a kind of the robe put over the former garment made of Chin not to display to elegance. 4. Fu, Ch n-Fa, Pei and T'i are a kind of women's wig. Ti and the six-Chia are women's hair ornaments. Ch'i-Chin and Ju-L are a kind of the working women's turbun. 5. The women's belt ornaments are classified into the practical things and the decorational things like those for men. The results regarding fabrics in the『the Odes』are as follow: 1. The silk fabrics; There are Chin, Hu, Chou, Tz , Su, Hsiu. 2. The woolen fabrics; There is Ho. 3. The linen fabrics; There are the hemp and the ramie in the remains of Chou period. Also there are Ch'ih and Hsi categorized in Ko fabrics.

• Journal of Korean Philosophical Society
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• v.148
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• pp.327-356
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• 2018

The aims this paper to examine Nietzsche's criticism on Paul's transvaluation of values. First, I will examine Socrates' transvaluation of values through which, Greek culture was deconstructed. He opened a path for the transvaluation of values before Paul and Nietzsche and reorganized Greek culture around his own values. I will also analyze the 'will to power' hidden behind Socrates' transvaluation of values. Second, I will examine the essence of the Paul's transvaluation of values. I will trace how Paul, through his transvaluation of values, could become the center of Christianity and, in turn, control European Culture. I will also show the difference between the teachings of Jesus and the arguments of Paul. Third, I will look at the Nietzsche's criticism on Paul's transvaluation of values. The key to Nietzsche's criticism on Paul is to evaluate Paul's transvaluation of values in terms of his will to power. And I will also look at the problems of Nietzsche's criticism on Paul. Fourth, I will look at Nietzsche's transvaluation of values. It is accomplished in such a way that he makes Socrates' and Paul's transvaluation of value alters. His transvaluation of values will be critically examined for strength in life and world understanding over Socrates' and Paul's transvaluation of values.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• v.7
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• pp.105-125
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• 2003

Personal- und Reflexivpronomen stehen in einer komplementaren Beziehung zueinander. Die vorliegende Arbeit zeigt, welches von beiden Pronomen verschiedenen AcI-Konstruktionen jeweils richtig ist Vor allem stelle ich hier die These auf, dass Grammatik in erster Linie ein Regelwerk ist und dass dernzufolge $S\"{a}tze$ mit gleicher Struktur immer einheitlich und konsistent mit denselben Regeln $erkl\"{a}rt$ werden sollten: (1) a. Der Gefangen $l\"{a}sst$ den Polizisten auf ${\ast}sich_i/ihn_i$ achten. b. $Hans_i{\;}l\"{a}sst$ Maria zu $sich_i/{\ast}ihm_i$ kommen. (2) a. $Peter_i$ sieht Hans von ${\ast}sich_i/ihm_i$ betrogen. b. $Hans_i{\;}f\"{u}hlt$ die Freundin von $sich_i/{\ast}ihm_i$ weggezogen. Bei diesen Beispielen liegt der Verteilungsunterschied der Pronomina nicht an Grammatikregeln sondern am individuellen Sprachgebrauch. Ferner wird hier darauf hingewiesen, dass die AcI-Verben mit Ausnahme des Verbs lassen a1s 3-wertige Verben so wie die $S\"{a}tze$ in Beispiel (3) zu behandein sind D.h., die Struktur $f\"{u}r$ AcI-Konstruktionen sieht so aus wie (4b), nicht wie (4a). Betrachten wir dies noch einmal an einem Beispiel: (3) a. Ich sehe mich $m\"{u}de$ b. Ich $f\"{u}hle$ mich viel besser.

• Journal of the Korean Chemical Society
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• v.10 no.4
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• pp.166-174
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• 1966

The multistep mechanism of photosensitized curing reaction cinnamoylated photosensitive polymer is proposed from the energy level diagram of cinnamic acid and sensitizer, and from the fact that excess of sensitizer brings the sensitivity to a limiting value etc. Various factors which have effects on the ability of sensitizer are also discussed. The mechanism involves following steps: activation to the first excited singlet states of cinnamoyl group(C) and sensitizer(S) by their absorption of photon, their intersystem crossing to the lowest triplet state, bimolecular internal quenching by formation of excimer of sensitizer, triplet excitation energy transfer and intermolecular addition between cinnamoyl group in ground state and that in triplet state. The rate equation derived from this mechanism is $-\frac{d[C]}{dt} = \frac{K_1[C]}{K_2 + [C]}[\frac{I^c_{abs}}{K_3 + [S]} + \frac{K_4[C]}{(K_5 + [C])(K_6 + [S])}(I^s_{abs} + \frac{K_7I^c_{abs}[S]}{K_8 + [S]})]$ where $I^c_{abs}\;and\;I^s_{abs}$: the rates of absorption of photon by cinnamoyl group and sensitizer $K_n$: Constants. It is proved with the cinnamate of poly(glyceryl phthalate)(PGC) in the absence of sensitizer using the infrared analytical method and successfully applied for the experimental data reported on the effects of the degree of cinnamoyl esterification and the concentration of sensitizer upon the sensitivity.

• The Korean Journal of Food And Nutrition
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• v.20 no.2
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• pp.202-208
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• 2007

This study had two purposes: first, to develop various health nutrition education materials for preschool children as well as their teachers and parents, and second, to apply the health nutrition education programs systematically. The health nutrition education materials consisted of : 'Salt! I know what it is and eat it', 'Friend! Let's have breakfast.', 'I eat vegetables(rainbow)', 'I hate fat', 'I enjoy exercise', 'I am growing very fast'. 'I am curious about my body', 'My body is important', 'Cigarettes, what are they?', 'What's included in cigarettes?'. 'Smoking, it gives my family pain', 'Let's quit smoking', and 'Let's drink moderately'. During the education period, booklets, wall charts, photographs, food models, videos, animated films, and demonstrations were utilized. Based on age, there were significant differences in the effects of 'I am curious about my body'(p<0.05), 'What is included in cigarettes?'(p<0.01), and 'Smoking, it gives my family pain'(p<0.05). There were also significant differences in 'Salt! I know what it is and eat it', 'Friends! Let's have breakfast.', 'My body is important.' and 'Let's quit smoking'. As a result, to improve food habits and health nutrition knowledge, health nutrition education programs must be presented to day care center children as well as their parents, and persistent education is necessary.

• Journal of the Korea Society of Computer and Information
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• v.20 no.8
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• pp.29-33
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• 2015

This paper proposes a discrete logarithm algorithm that remarkably reduces the execution time of Pollard's Rho algorithm. Pollard's Rho algorithm computes congruence or collision of ${\alpha}^a{\beta}^b{\equiv}{\alpha}^A{\beta}^B$ (modp) from the initial value a = b = 0, only to derive ${\gamma}$ from $(a+b{\gamma})=(A+B{\gamma})$, ${\gamma}(B-b)=(a-A)$. The basic Pollard's Rho algorithm computes $x_i=(x_{i-1})^2,{\alpha}x_{i-1},{\beta}x_{i-1}$ given ${\alpha}^a{\beta}^b{\equiv}x$(modp), and the general algorithm computes $x_i=(x_{i-1})^2$, $Mx_{i-1}$, $Nx_{i-1}$ for randomly selected $M={\alpha}^m$, $N={\beta}^n$. This paper proposes 4-model Pollard Rho algorithm that seeks ${\beta}_{\gamma}={\alpha}^{\gamma},{\beta}_{\gamma}={\alpha}^{(p-1)/2+{\gamma}}$, and ${\beta}_{{\gamma}^{-1}}={\alpha}^{(p-1)-{\gamma}}$) from $m=n={\lceil}{\sqrt{n}{\rceil}$, (a,b) = (0,0), (1,1). The proposed algorithm has proven to improve the performance of the (0,0)-basic Pollard's Rho algorithm by 71.70%.