• Bulletin of the Korean Mathematical Society
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• v.50 no.2
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• pp.399-405
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• 2013

We explicitly construct a thin basis for the set $\mathbf{M}$ of monic polynomials in one variable $t$ over a finite field ${\mathbb{F}}_q$.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.758-761
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• 2003

The goal of the research is to study and describe a new stressed state of High Temperature Superconducting (High-T$_{c}$) YBCO Films, to create of SQUIDs (Superconducting Quantum Interference Device) on the bases of these films with maximal sensitivity. With the experimental investigation of the stressed films grown by laser ablation method and its properties, the fabrication of the dc-SQUIDs with maximal sensitivity on the bases of the stressed YBCO films were carried out. The stressed film having the value of the critical current density J$_{c}$=3ㆍ$10^{5}$A/$\textrm{cm}^2$ was the more stable than others.ers.s.

• Korean Journal of Pharmacognosy
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• v.1 no.1
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• pp.35-37
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• 1970

The methanol extract of two kinds of liquorice on Korean market was examined for basic components by a general alkaloid extraction method. The hydrochloride of the components gave all positive reactions to five coloration and precipitation tests. Four coloration tests on the thin-layer chromatograms of the free bases showed three to five spots which are considered to be basic.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.6
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• pp.962-967
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• 2017

The Diamond-Like-Carbon (DLC) coating is a new carbon-based amorphous material. Carbon ions in the plasma are electrically accelerated and collide with the substrate to form a thin film. This film has similar properties to diamonds such as high surface hardness, low coefficient of friction, corrosion resistance and durability that do not react with acids and bases. Also, since there is no thermal deformation, it can be printed at room temperature. and coated on almost all materials such as paper, polymer, ceramics and various metals even aspheric lens it is possible to mirror surface coating with excellent surface roughness. In this paper, we have analyzed the DLC film formed by Filtered Arc Ion Plating (Filtered AIP) process.

• Journal of the Korean Home Economics Association
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• v.40 no.12
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• pp.189-197
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• 2002

The purpose of the study is to analyze the suitability of ready-to-wear apparels for adult women by considering their body types. 341 women aged from 20 to 60 were surveyed for this study. The survey was taken from November, 1999 through November, 2000. The subjects were classified into 4 groups(thin, normal young aged, normal middle aged, fat) according to BMI and Rohrer index. For data analysis, descriptive statistics, crosstabs, F-test, Duncan-test were used. As the result, it is our findings that, in purchasing clothes, especially in case of pants, people choose them mostly based on waist and hip. However, in that the normal young aged group bases thigh circumference, we need to consider such points. As for one-piece, height was an important factor, while chest was the most important factor for the fat group. In relation to the suitability of ready-to-wear garments, the groups showed significant differences for blouses, one-pieces, and jackets, respectively. Blouses didn't fit 29.8% of the fat group, and one pieces fitted thin or normal subjects to some extent. However, one pieces didn't fit 34% of the fat group while jackets didn't fit 51.4% of them. This result shows that there are difficulties in choosing clothes dependent on body types.

• Journal of the Korean Society of Safety
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• v.22 no.1 s.79
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• pp.13-18
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• 2007

Structural integrity assessment of thin-walled pipes and pipe items has become one of the major issues in the nuclear power plant. ASME Section XI Code Case N-597-2 provides a criterion for acceptance of the pipes. But the code case has several limitations for application and sometimes gives too conservative or non-conservative results. So it is necessary to understand fully the technical bases of the code case. In the code case N-597, the allowable local thicknesses of thinned straight pipes are given for three different cases. Because of the different technical base, each case gives different thickness values and sometimes gives contradictory values. In this paper attempts were made in order to propose a unified rule for the allowable local thickness and in order to remove or relax the restrictions on the application of the code case. For this purpose elastic stress analyses were made using the finite element method and the stress results were examined. Based on the obtained bending stress results, a very simple procedure was proposed to obtain the consistent allowable local thickness for the thinned straight pipes.

• The Journal of Korean Academy of Prosthodontics
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• v.27 no.2
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• pp.79-100
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• 1989

The Purpose of this study was to investigate material differences in stress transmission among various artificial teeth and denture base materials. For this study, a two-dimensional finite element model and a two-dimensional photoelastic model of a mandible with complete denture were made. A resin tooth and a porcelain tooth were used as artificial teeth, and a resin base, a metal lined base, and a soft-liner lined base were used as denture bases. An occlusal load was applied and principal stresses generated in the supporting tissues were compared. To test the impact stress transmission, strain gauge attached to the denture base specimens made of the different materials were made in thick and thin groups. Voltage outputs from hitting the specimen with a steel ball were compared. The results were as follows : 1. In FEM, increasing the mucosal thickness reduced the maximum principal stresses in the supporting tissues, but altering the tooth materials and the base materials induced no difference in the stresses. 2. In photoelastic model study, no difference in fringe order among the specimens were observed, but the thick mucosa group and the soft-liner lined group revealed a more uniform distribution of the load. 3. In strain measuring, the impact force transmission was highest in the soft-liner lined group, and was the lowest in the metal lined group(p<0.01). 4. In the thin group using the resin base, the porcelain tooth showed higher impact stress transmission than the resin tooth(p<0.01), but no difference was observed between them in the thick group. In the soft-liner lined group, the porcelain tooth showed higher impact stress transmission than the resin tooth(p<0.01), but no difference was observed between them in the metal lined group. 5. The thick group showed lower impact stress transmission than the thin group(p<0.01).

• YAKHAK HOEJI
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• v.17 no.3
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• pp.129-136
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• 1973

In order to establish the chemical standards for the quality control of ginsentgextract, an approach for the assay of sapogenin contents in the part of main roots and fibrous side roots was performed by combination of preparative thin layer chromotographic procedure and vanillin-$H_{2}SO_{4}$ color reaction. The contents of dammarane aglycones as funcction of dammarane glycosides in 80%-EtOH extracts were analyzed by the method from the main roots and fibrous side roots of Korean ginseng grown for 4-6 years. The differences by their grown ages in the contents of dammarane glycosides, in the ratio of panaxadiol to panaxatriol contents, and in the mounts of 80% EtOH extract were not significant in the parts of main roots and fibrous side roots of Korean gingeng. Differences due to the part for medicinal uses were highly significant in all parameters mentioned, showing following results ; in the main roots ; 80% EtOH extract, 12.7-15.7 % : the ratio of aglycone composition, 0.955-1.012 : dammarane glycoside (as diglucoside bases), 1.537-1.863 ; in fibrous isde roots ; 80% EtOH extract, 26.0-26.02% : dammarane glycoside, 4.767-5.641 : the ratio, 1.456-1.50.

• Journal of Plant Biology
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• v.35 no.3
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• pp.197-203
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• 1992

During the study of the distribution of cellular slime molds in Halla mountain of Korea, a new yellow-pigmented Dictyostelium was isloated. This exibited several distinctive features which differed from the published species, and was designated as a new species, Dictyostelium jlavidum sp. n. Hong et Chang (Type strain HL-1). It was cultivated at $20-22^{\circ}C$ on weak nutrient agar media, 0.1 L-P in association with Escherichia coli. Sorocarps were 4-10 mm or more in length, conspicuously yellow throughout or with sori, typically solitary, unbranched or sparsely and irregularly branched. Sorophores were strongly tapered from bases to tips. Bases were typically well-formed disks in form or conically expanded. Sori were yellow to yellowish in color, and the pigmentation intensified with age. Spores were long and thin elliptical, mostly $4.8-9.6{\times}1.9-3.8\;(ave.\;7.3{\times}2.8)\;\mu\textrm{m}$, L/B index about 2.4-2.8, without polar granules.anules.

• Journal of the Society of Naval Architects of Korea
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• v.56 no.2
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• pp.175-186
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• 2019

Number of studies on the buckling of thin cylindrical pressure vessels, such as submarine pressure hull and pipe with a large ratio of diameter/thickness, have been carried out in the naval and ocean engineering. However, research about thick cylinder pressure vessel has not been active except for the specific application in nuclear area. There are not many papers for the estimation of buckling and ultimate load capacity of thick cylinders for the deep sea usage. Thus, it is important to understand the theoretical bases of the buckling and collapse process and the derivation process of such loads for the proper design and structural analysis. The objective of this study is to survey the collapse behavior, to analyse and clarify the derivation procedure and to estimate the ultimate collapse load for thick cylinder by analyzing relevant books and papers. It is found that the yielding begins at the internal surface of the thick cylinder and plasticity develops from the internal surface to the external surface to generate collapse. Also the initial imperfection of cylinder develops flattening and consequently accelerates buckling and finally ultimate collapse. By comparing the collapse loads of aluminum thick cylinder by applying equations herein, it is shown that the equations analyzed are appropriate to obtain collapse load for thick cylinder.