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Linear Differential Equations on the Complex Plane
Park, Kong Rae 木浦大學校基礎科學硏究所 1983 基礎科學硏究誌 Vol.1 No.-
The purpose of this paper is to emphasize the fact that, unlike homogeneous linear differential equation on real line, the continuity of the coefficient functions ?? , k=0, 1, 2,‥‥, n-1, does not imply that dimension of ?? is n.
역상 미셀계에 가용화된 Mesityl Oxide, N-Nitrosodime-thylamine 및 Isonicotinic Acid의 미세환경에 관한 연구
고정수 木浦大學校基礎科學硏究所 1986 基礎科學硏究誌 Vol.4 No.-
From the n→π* absorption maxima of mesityI oxide and N-nitrosodimethylamine, the polarities in the cavities of dodecylammonium propionate (DAP) and dodecylamonium butyrate (DAB), both aggregated in cyclohexane containg different amounts of water, were determined. The Dimroth polarity parameter, E?(30), was found to be increased linearly as the amounts of water increased. From the ¹H NMR measurements, water, mesityl oxide, N-nitrosodimethylamine and isonicotinic acid were found to be localized in the polar cavities of DAP and DAB when aggregated in carbon tetrachloride.
수소화된 비정질 규소박막의 정상상태 광전기 전도도 측정에 의한 재결합 과정의 연구
박혁렬,이주천 木浦大學校基礎科學硏究所 1985 基礎科學硏究誌 Vol.3 No.-
Steady-state photoconductivity measurements are made on thin films of hydrogenated amorphous silicon(a-Si-:H) prepared by RF glow discharge of silane(SiH₄) as a function of temperatures and excitation light intensities. The experimental results are explained on the basis of the proposed recombination model considering at least two set of localized states in addition to the extended electron and hole states.
Linear Differential and Linear Difference Equations
Park,Kong-Rae 木浦大學校基礎科學硏究所 1986 基礎科學硏究誌 Vol.4 No.-
IIn this paper, we study an important question: Given the linear ODE(1), can a linear O△E(3) be determined that has the same general solution? The answer to the question is simply yes and the explicit form of the required O△E is (3) using (9) and (10). Although we have assumed the ?? to be distinct, the conclusion is seen to be valid when some ?? coincide.
Application of the Seifert and Van Kampen Theorem
Kim,Hyung-Kook,Jung,Choon-Taek 木浦大學校基礎科學硏究所 1984 基礎科學硏究誌 Vol.2 No.-
In this paper, by using the Seifert and Van Kampen Theorem, we investigate relations among induced homomorphisms by inclusion maps in order to determine the fundamental group of an arcwise-connected space. And we also show that the knot group Ⅱ(R³-K) is isomorphic to the fundamental group Ⅱ(S³-K).
高正秀 木浦大學校基礎科學硏究所 1983 基礎科學硏究誌 Vol.1 No.-
The UV absorption spectra of anthracene in various solvents and aqueous cationic and anionic micellar systems have been examined. It was observed that the shoulder peak at a wavelength of 5nm shorter than the 0 - 0 band has disappeared according to increasing the polarity of The monotonic variation of the ration of molar absorptivities at the shoulder ?? and the 0 - 0 band ?? with H value has provided the calibration curve for the solubilized anthracene. The characteristic intensity ratios of the solubilized anthracene in aqueous cetyltrimethylammonium bromide (CTAB) and sodium lauryl sulfate (NaLS) solutions are both 0.52 and the effective average H values of the microenvironment of the solubilized anthracene are both 0. 43, corresponding to an effective average dielectric constant of 31. It is considered that the microenvironment of the solubilized anthracene in aqueous CTAB and NaLS solutions are polar and the solubilized anthracene appear to be located on the surface of micells.
ZnS:Mn 형광체의 Photoluminescence와 Cathodoluminescence에 관한 연구
丁海文,鄭良準,신영진 木浦大學校基礎科學硏究所 1983 基礎科學硏究誌 Vol.1 No.-
A study has been made for the photo uminescence and cathodo- luminesence of zinc sulfide phosphors. As an activator, manganese was used. Two different samples of phosphors: ZnS, ZnS:Mn are obtained by firing at 850℃ for an hour in nitrogen gas. From the analysis of photoluminescnce and cathodo- luminescence spectrums, there are two different orgins for the emission, that is, the first is due to deep centers(broad luminescence emission), the second is due to atomic transition (localized emission). Also it show that the splittings of energy level for ?? in zinc sulfide crystal is order of ?? at 15K and 300 K from the analysis of photoluminescence and cathodoluminescence.
RF 글로우 방전에 의한 PIN형 비정질규소 태양전지의 제작과 P층의 최적두께 결정
박혁렬 木浦大學校基礎科學硏究所 1984 基礎科學硏究誌 Vol.2 No.-
Thin film amorphous silicon solar cell in PIN structure has been fabricated and the effects of p-layer thickness on photovoltaic properties were investigated. The sample were prepared by RF glow discharge decomposition of silane, silane+phosphine and sillane+diborane mixture. The optimum p-layer thickness is about 100Å. The absorption in p-layer is a dominant factor to decreased the conversion efficiency.
An Interpretation on Godel's Incompleteness Theorem
Kim,Yong-Kuck,Jung,Choon-Taek 木浦大學校基礎科學硏究所 1986 基礎科學硏究誌 Vol.4 No.-
In this paper, we make an attempt so as to renovate interpretations delivered concerning Godel's Incompleteness Theorem, that its whole proof processes including the undecidable Formula, along with primitive recursive predicates as well as primitive recursive functions, and correspondence between the system of Metamathematics and that of Natural numbers introduced, should be reformed briefly and consistently in a more generalized appearance.
The Properties of the Cousin Complex for a Commutative Noetherian Ring
Park, Hyung-Bin 木浦大學校基礎科學硏究所 1987 基礎科學硏究誌 Vol.5 No.-
In this paper, we sutdy the construction and some proprties of the Cousin comples C(M) for a module M.