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임옥희,박홍구 漢陽大學校 自然科學硏究所 2000 自然科學論文集 Vol.19 No.-
본 논문에서는 유한체에서 위수가 소수인 순환들로 결합된 선형화된 치환 다항식에 관한 몇가지 결과가 주어진다. 즉, Betti-Mathieu군의 Sylow p-부분군에 속한 다항식이 소수p를 위수로 가질 필요충분조건을 유도한다. In this paper, some results on the linearized permutation polynomials over the finite field which are composed of cycles of prime order are presented. We find a necessary and sufficient condition for a polynomial of a Sylow p-subgroup of the Betti-Mathieu group to have prime order.
박홍구,Park, Hong-Goo 한국수학사학회 2006 Journal for history of mathematics Vol.19 No.1
본 논문은 조합론 분야에서 매우 중요하게 다루는 조합대상들의 동형문제에 관한 이론적 배경의 연구와 아울러 역사적 배경을 고찰해본다. 또한, 유한체에서 케일리대상들의 동형사상 문제에 대한 부분적인 결과를 소개한다. In this paper, we study the theoretical and historical backgrounds with respect to isomorphism problem of combinatorial objects which is one of major problems in the theory of Combinatorics. And also, we introduce a partial result for isomorphism problem of Cayley objects over a finite field.
박홍구,Park Hong Goo 한국수학사학회 2005 Journal for history of mathematics Vol.18 No.2
본 논문에서는 유한체의 치환다항식 이론의 기본 개념 및 역사적 배경을 주요 치환다항식들을 중심으로 분석해본다. 아울러 유한체의 원소로 이루어진 순환들의 다항식 표현법을 구현한다. In this paper, we analyze the basic concepts of permutation polynomials over finite fields, and the historical background through the use of the major classes of permutation polynomials over the fields. And also, we find a method of the polynomial representation with respect to cycles on the fields.
朴洪球 세종대학교 1982 세종대학 논문집 Vol.9 No.-
This study relates to a process for the Concentration of aqueous Solutions of acetic acid, the removal of part or all of the water therefrom, and the production thereby of a Concentrated acid. The mutual solubility and the tie-line data were obtained at 25℃ and 1 atm for ternary Systems of acetic acid (Solute), Water (diluent), and benzene (Solvent). A good linear relationship of the Fujita-Hirata plot was obtained using benzene. It is desirable to separate the acetic acid from the water by an azeotropic distillation rather than by straight distillation. In many cases the addition of a Solvent or entrainer to form an azeotrope whih one or more of the materials in the original mixture will change the relative Volatility of the close boiling materials and thereby allowing the components to be separated as azeotrope combinatios with the entrainer. In a process for Concentrating aqous Solutions of acetic acid distilled off by the use of benzene itself as an entrainer in an azeotropic distillation and returned the Condensed benzene to the azeotropic distillation Column. The solvent for dehydration of acetic acid Should be non-corrosive to the equipment, readily available, inexpensive. The author investigated to evaluate the corrosion effects of Sus 27 in acetic acid-benzene-water systems. The Corrosion resistance of Sus 27 in the ternary systems of the above mentioned systems was commonly below 0.5㎜/yr.
박홍구 세종대학교 1981 세종대학 논문집 Vol.8 No.-
The author have investigated the extraction of iodine from sea weeds of Je Joo island and its chemical manufacturing process was discussed. The improved manufacturing is no need for kelp procedure and this experiment is comparatively simple and less time consuming as compared to the conventional methods for manufacture of iodine. However, yield doesn't show a remarkable increase.
朴洪球 세종대학교 1986 세종대학 논문집 Vol.13 No.이공
The physicochemical properties of wheat fluors were investigated for strong wheat fluor(Elephant), medium wheat fluor(Bear), weak wheat fluor(Cow). There were no significant differences in the proximate chemical compositions of the tested wheat fluors; however gluten Contents were 11.62% for the strong type fluour, 8.51% for medium type fluor and 6.92% for weak fluor. In farinograph data, the strong wheat fluor had better development time, stability and Valorimeter Value of doughs. Elephant wheat fluor had lower maximum viscosity of amylograph than Bear and cow wheat fluors. The gelatinization phenomena of wheat starch were examined by means of degree of digestability by α-amylase and X-ray diffraction. The grain size was measured by X-ray diffraction method. The grain size was enlarged as the time goes by. The wheat starch gels gradually crystallized in a certain period of time. These results indicated that there were no significant differences in the X-ray diffraction patterns among the tested fluors.
귤汁의 Ascorbic acid 含量에 따른 嗜好와 安定性에 關한 硏究
朴洪球 세종대학교 1983 세종대학 논문집 Vol.10 No.-
Orange is one of those fruits which could supply relatively abundant quantity of vitamin C. The taste characteristics of the orange juice increased with ascorbic acid (sample: ascorbic acid =200g: 400㎎) were most acceptable to the sensory panel, it is well known that ascorbic acid of many fresh fruits and Vegetables decreases during a heat Sterilization process. The degree of the loss of the ascorbic acid will also vary according to the conditions in which canned juice is sterilized. The kinetics of the thermal oxidative nonphotolytic degradation of ascorbic acid in a orange juice due to accelerated temperature method have been studied. The temperatures for the accelerated temperature method studied were 85℃ and 95℃. The vitamin appears to degree initially by a pseudo-Zero order reaction, but other evidence indicates that the true order of the reaction is closer to one. By use of the Arrhenius equation data obtained from high temperature studies have been used to predict shelf life at room temperature. The heats of activation(ΔHa) of ascorbic acid degradation is 23.1 ㎉/㏖e. The shelf-life(t_0.9) of ascorbic acid degradation in this sample is estimated 979.8hrs.