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통계기법에 대한 적정성의 연구 : 영남대학교 석사학위 논문을 바탕으로 In Case of the Master's Degree in Yeungnam University
조영석,최숙화,주종래,이성원,이제영 嶺南大學校基礎科學硏究所 1999 基礎科學硏究 Vol.19 No.-
People who are not statistical experts have made many mistakes as easy a statistical means could be used. They have to collect the proper data for their purposes an must use statistical methods after testing adequacy. This study has made a check list an evaluated the adequacy of statistical analyses of papers in the master's degree in Yeungnarm University. It has been evaluated that many papers have not been considered the adequacy of statistical analysts. Institute of Statistics, Yeungnam University and Department of Statistic may make a plan for the future based on these results.
2-Aminothiazole 유도체의 살균 효능 (Ⅲ)
나춘섭,서정대,권혁만 嶺南大學校基礎科學硏究所 1999 基礎科學硏究 Vol.19 No.-
A series of 4-phenyl-2-anilinothiazole derivatives were prepared by the reaction (2-aminothiazoles and 2-chloro-3, 5-benzotrifluoride and tested for their protective activitie against rice leaf blast, rice sheath blight, cucumber gray mold, wheat leaf rust. Most of compounds containing fluoro substituents at various positions of their phenyl ring at the position 4 in the thiazole ring showed high in vivo fungicidal activity.
Diffusion problem for disordered systems and its solution
Joh, Young G. 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
we show in detail that numerical solution of the complicated diffusion process among the ultrametric barriers can quantitatively account dynamics of disordered systems. In particular, the maxima in the relaxation rate of zero-field-cooled magnetizations are reproduced exactly at t = t_w, where t_w is the waiting time in the field-cooled state. In addition, we obtain agreement between the calculation of temperature cycling protocols with experiment. The result suggests that the temperature dependence of the barrier heights extracted from a completely different experiment is, in fact, universal.
Linear Poly(ethyleneimine)을 포함하는 루테늄 착물의 합성과 성질
박명규,한정호,조태섭 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
Many researchers have interested ruthenium complexes due to their similarity and difference in chemical properties. In this study, [Ru(phen)_2LPEI]^2+ complex was synthesized by the reaction of [Ru(phen)_2Cl_2] with polymeric amine ligands, namely, linear poly(ethyleneimine)(LPEI). [Ru(phen)_2LPEI]^2+ complexes were analyzed by NMR, UV/VIS, and MS spectrometry. as well as Elemental analysis. From NMR analysis, [Ru(phen)_2LPEI]^2+ complexes were confirmed by comparison of [Ru(phen)_2Cl_2] with LPEI complexes. Coordination of LPEI ligands to [Ru(phen)_2Cl_2] showed absorption at 480㎚, whereas [Ru(phen)_2Cl_2] complex alone has a peak at 370㎚. Mass of LPEI complexes was analyzed 1638 and 1898 dalton, [Ru(phen)_2LPEI]^2+ complex form MS spectrometry. The spectroscopic methods for the [Ru(phen)_2LPEI]^2+ complexes system revealed that two nitrogen donor atoms on the LPEI chain are coordinated to the [Ru(phen)_2Cl_2] complex.
BaTiO_3 전기 광학 결정에서의 홀로그램 회절특성에 관한 연구
한현미,황웅,이상조,곽종훈 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
To understand the principle of hologram recording, we fabricate a hologram in a photopolymer film that has a large diffraction efficiency. We performed two-beam coupling experiments in photorefractive BaTiO_3 crystal and measured real-time diffraction efficiency against incident beam angle. Phase shift of photorefractive grating with respect to the intensity grating is also measured by means of the grating translation technique.
김기현,이상조,김태균,이정훈,성기영,곽종훈 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
Asymmetric self-diffracted beams are appeared both even when the Bragg diffraction condition is satisfied and the modulation refractive index is large in photorefractive materials. To explain asymmetric diffraction efficiencies of the self-diffracted beams, we derived an approximate analytic solution based on the coupled wave equations.
아조색소(Methylorange)가 첨가된 PVA(Poly vinyl alcohol) 필름의 광유도 복굴절 측정과 분석
김은주,양혜리,우성용,이상조,곽종훈 嶺南大學校基礎科學硏究所 2002 基礎科學硏究 Vol.22 No.-
We fabricated methylorange(MO) doped PVA(Poly vinyl alcohol) thin film for various concentrations of methylorange and measured the photoinduced birefringence of MO/PVA thin film by means of the pump-probe technique. The experimental results were analyzed by adopting empirical stretched-exponential kinetics.
poly(isobutylene-co-maleic acid)에서 CdS 나노입자의 합성과 특성
이재원,남정우,배태문 嶺南大學校基礎科學硏究所 1999 基礎科學硏究 Vol.19 No.-
CdS nanoparticles were prepared in the presence of poly(isobutylene-co-maleic acid)sodium salt. This copolymer plays an essential role in stabilizing CdS nanocolloid and in controlling the particle size (5~7nm). The polymer-CdS nanocomposites thus prepared is stable in solution and spheres in morphology. And energy band gap of CdS nanoparticle prepared is ?? 2.91eV.
차진순 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
A new class of reducing agent, triisopropoxyborane is readily prepared by treating three equivalents of isopropyl alcohol with borane solution(BH_3-THF) at 0 ℃ or 25 ℃ and its reducing characteristics toward selected organic compounds containing representative functional groups was examined. By the use of triisopropoxyborane, ketones, aldehydes as well as epoxides could be reduced satisfactorily, the acetone formed being removed from the equilibrium mixture by stream of dry nitrogen. This mild and specific reduction method agent may occur via the Meerwein-Ponndorf-Verley reduction. Most aliphatic aldehydes and ketones were reduced rapidly to the corresponding alcohols. In addition, aromatic epoxides examined were readily reduced to the corresponding primary alcohols. Triisopropoxyborane provides a highly convenient and selective method for converting a wide variety of organic functionalities to the useful other organic functions.
강석복,유세기 嶺南大學校基礎科學硏究所 2002 基礎科學硏究 Vol.22 No.-
In this paper, we prove that the transformed sample Lorenz curve, normalized sample Lorenz curve, and the test statistics for testing of normality based on the normalized sample Lorenz curve and the modified Lorenz curve which were introduced by Kang and Cho (2001a, 2002) are location and scale invariant statistics.