http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Surface-mediated Photoalignment of Liquid Crystalline Polymers
Takahiro Seki 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Most polymer films have a free surface (surface exposed to the air). Recent studies have emphasized the importance of the free surface in many aspects of polymer processing. We have recently shown that the free surface plays the critical role in controlling the mesogen alignment of side chain liquid crystalline polymers (SCLCPs).<sup>1</sup> A skin layer (typically 20 nm thickness) or inkjet-printed pattern at the free surface is able to regulate the mesogen orientation of SCLCP films of micrometers thickness.<sup>2,3</sup> The mesogen orientation can be switched by the photo responsive top surface both in the in-plane<sup>2</sup> and out-of-plane3 directions. Another interesting aspect is the surface effect for the induction of surface morphing.<sup>4</sup> Surface relief grating formation could be performed also for a light-inert SCLCP films with a photo responsive surface skin layer.<sup>5</sup> (1) T. Seki, Bull. Chem. Soc. Jpn., 91, 1026 (2018); T. Seki, Polym. J., 46, 751 (2014); T. Seki, Macromol. Rapid Commun., 35, 271 (2014). (2) K. Fukuhara et al., Nat. Commun., 5, 3320 (2014). (3) T. Nakai et al., Langmuir, 32, 909 (2016). (4) I. Kitamura et al., Sci. Rep., 9, 2556 (2019). (5) I. Kitamura et al., Sci. Rep., 10, 12664 (2020).
EPR = ER, scattering amplitude and entanglement entropy change
Seki, S.,Sin, S.J. North-Holland Pub. Co 2014 Physics letters. Section B Vol.735 No.-
We study the causal structure of the minimal surface of the four-gluon scattering, and find a world-sheet wormhole parametrized by Mandelstam variables, thereby demonstrate the EPR = ER relation for gluon scattering. We also propose that scattering amplitude is the change of the entanglement entropy by generalizing the holographic entanglement entropy of Ryu-Takayanagi to the case where two regions are divided in space-time.
ON THE USE OF REALIZED QUASI-MONTE CARLO METHOD IN EUROPEAN OPTION PRICING
Seki Kim,Doobae Jeon 한국산업응용수학회 2006 한국산업응용수학회 학술대회 논문집 Vol.1 No.2
The pricing of options is a very important problem encountered in complex financial markets. The famous Black-Scholes model provides explicit closed form solutions for the values of European call and put options. But for many other options, either there are no closed form solutions, or if such closed form solution exist, the formulas exhibiting them are complicated and difficult to evaluate accurately by conventional methods. In this case, Monte Carlo methods may prove to be valuable. Monte Carlo methods are often used when other methods are difficult to implement due to the complexity of the problem. The disadvantages of Monte Carlo Methods are that the error term is probability and that it can be computationally burdensome to achieve a high level of accuracy. Quasi-Monte Carlo is technique for improving the efficiency of the Monte Carlo Method. Under the conventional approach pseudo-random numbers yields an error bound that is probabilistic which can be a disadvantage. Another drawback of the standard approach is that many simulations may be required to obtain a high level of accuracy. Quasi-Monte Carlo Methods use sequences that are deterministic instead of random. These sequences improve convergence and give rise to deterministic error bounds. But these Methods have some limits which does not reflect the trend of rise, fall and hold. We divide 2-dimensional space into three parts. Each three parts indicate rise, fall and hold. If this trend apply to the Quasi-Monte Carlo Methods, it may be better than the known Methods.
Seki, Eiko 이화여자대학교 동서교육연구소 1985 East west education Vol.6 No.1
In this chapter, we examine the way how Korean people were involved in the reestablishment of their education under the circumstances mentioned above. Under the U.S. Military Government, how did Koreans view their new education? What did they do with its reconstruction? And what sort of role did they play in the whole picture of educational reform in Korea after Liberation? Unlike the case in Japan, the U.S. Government was not ready for occupation in Korea after World War Ⅱ. As a result, they could not help taking the so-called "Koreanization Policy" by asking for the assistance of a number of Korean people for the occupational government. In other words, Koreans were ready to meet the demand in the direction of Koreanization. In the field of education, for instance, the leading educators had their meetings right after Liberation in order to elaborate their plan for reestablishment of education for the Korean national, which had been ignored for 36 years. It is safe to say that the reestablishment of Korean education after Liberation was the combination of efforts by the Korean people to recover their education based on nationalism and by the U.S. Military Government for the Koreanization Policy. Many of the Korean prominent educators played important roles as either staff members of the Bureau of Education of the Military Government or as members of advisory committees for the Military Government.