• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권10호
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• pp.453-456
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• 2005

We have fabricated superconducting ceramics by chemical process. A high Tc superconducting with a nominal composition of YBaCuO was prepared by the pyrolysis method. The electromagnetic properties in YBaCuO superconductor was studied. In the measurement of current-voltage characteristics, a voltage across the superconducting sample was observed on applying an external magnetic field. The voltage increases with increase in applied magnetic flux, but it becomes constant at about 10$^{-2}$T. The voltage continues to appear the removal of the magnetic field. The appearance of the voltage is ascribed to the trapping of magnetic flux. Depending on the direction of applied magnetic flux less than 2.5$\times$10$^{-5}$ T, the voltage in the magnetized sample increases or decreases.

• 설비공학논문집
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• 제29권1호
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• pp.21-28
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• 2017

Curtain-wall systems have been widely applied to buildings because of their lightweight and constructability characteristics. However, as curtain-wall systems include many building materials, vapor barriers can become damaged and condensation can occur. Due to the material properties of stone curtain-walls, the external appearance and structure of a building could be damaged and the insulating performance of the curtain-wall could be worse. Natural ventilation using an air cavity in a curtain-wall is expected to be effective for the prevention of condensation in inner walls and for the reduction of building cooling energy use in the summer. The purpose of this experimental study is to analyze the influence of a ventilated cavity on the insulating performance of a curtain-wall and the ventilated cavity depth and ratio of top opening needed to prevent condensation in a curtain-wall.

• Journal of Species Research
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• 제9권4호
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• pp.489-491
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• 2020

An yponomeutid genus Eumonopyta Moriuti, 1977 is recorded for the first time from Korea, based on the species Eumonopyta unicornis Moriuti, 1977. Eumonopyta is distinguished from Yponomeuta by the lack of the areole in the forewing, the presence of the hindwing veins, Sc and R₁ completely fused, the lack of the spinules on the gnathal processes, and the presence of three spiniform cornuti in the phallus. Eumonopyta unicornis is characterized by the presence of greenish irrotation on the forewings. The Korean records of E. unicornis are based on two male specimens from the islands, Geojedo (Gyeongsangnam-do) and Jejudo (Jeju-do) and one female specimen from the island Dolsando (Jeollanam-do). External appearance and genitalia of E. unicornis are redescribed and illustrated. The occurrence status of E. unicornis in Korea is briefly discussed. With our records from Korea, the distributional range of E. unicornis is expanded from Japan and Taiwan.

• 한국연초학회지
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• 제8권1호
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• pp.41-48
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• 1986

This experiment was carries out to study on the effect of temperature raising rate to chemical composition of tobacco leaves during the midrib drying stage of flue-curing. The results were as follows : In the case of the temperature raising rate became more rapidly during midrib drying stage. It had a tendency to increase in oxailic acid, succinlc acid, ammonia, polyphenol; there was a large loss of total sugar, reducing sugar, malic acid, palmitic acid and linolenic acid; leaf color became more reddish; the leaf quality index value decreased, thereby the quality of external appearance deteriorated. It is desirable that the temperature raising rate had to be more slowly.

• 한국표면공학회지
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• 제36권2호
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• pp.168-175
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• 2003

The purpose of solder plating on chip external electrode is to provide a proper solderability to chips on PCB's. The quantitative or qualitative analysis of solderability has been performed by destructive methods, reflow or flow. Evidently, the solderability tends to depend on the grain structure which is varied with additives. Research on the feasibility of employing electrochemical techniques to characterize the solderability of electroplated tin - lead, with respect to the additives, was non destructively performed. The deposit morphology and the polarization behavior of electrolytes containing proprietary additives were evaluated to investigate the soldering degradation. The plated panels from synthetic electrolyte were analyzed according to % Sn, plating thickness, deposit appearance, grain structure, solderability and cyclic voltammetry.

• 건축역사연구
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• 제1권1호
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• pp.18-32
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• 1992

The Palaces of Chosen dynasty in Seoul had lost its original features. The external appearance of the buildings that remains in palace nowadays, have got former conditions, but its enteriors are reconstructed or removed So we have a little knowledge of interiors of palace buildings, expecially of the door and window system. To clear up ambiguity of what kinds of door are selected, and sorts of using methods are prevailed, we must persuit from the latest building to the older building, and compare with documents. For that purpose the Chukchodang of Toksu palace is selected, which reconstructed in 1904, and compared with the document published in 1906. The consequence of investigation is that the palace buildings were adopted double or triple window system, and the main room have buffer zones, such as corridors or small rooms. And the main rooms were facing with wall paper, so metal fittings are hidden and wooden surfaces are hardly expose for the purpose of amenity.

• 아동학회지
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• 제27권1호
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• pp.125-137
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• 2006

Of the 2,593 children picture books published in Korea between 2001 and 2003, 46% were Korean in origin, while 53.9% were Korean translations of books originally in English, Japanese, French, or German. This study compared 45 of the translations with the originals. Of these, 49.2% had contents not included in the originals, and 31.1 % had omitted contents. More over, 7.6% of the Korean versions were different in punctuation codes and signs, and 6.7% were different from originals in length of sentences. Most of the books were on general or global issues rather than culture-bound. However, among the English books, there were more than 20 cases different from Korean culture in person's names, external appearance, food, and/or clothing.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권10호
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• pp.481-484
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• 2006

The electric properties in YBCO superconductor was studied. In the measurement of current-voltage characteristics, a voltage across the superconducting sample was observed on applying an external magnetic field. The voltage increases with increase in applied magnetic flux, but it becomes constant at about $10^{-2}T$. The voltage continues to appear the removal of the magnetic field. The appearance of the voltage is ascribed to the trapping of magnetic flux. Depending on the direction of applied magnetic flux less than $2.5{\times}10^{-5}T$, the voltage in the magnetized sample increases or decreases.

• Journal of Magnetics
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• 제10권4호
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• pp.133-136
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• 2005

The NiMn/NiFe bilayer structure which was short time annealed in order to induce unidirectional anisotropy were studied as a function of annealing temperature. The maximum exchange bias field of NiMn/NiFe bilayer was presented at $250^{\circ}C$ after short time annealing process with no external field. The appearance of exchange bias was due to phase transformation of NiMn layer. In plane angular dependence of a resonance field distribution which measured by FMR was analysed as a combined effect of unidirectional anisotropy and uniaxial anisotropy. The resonance field and the line width from FMR measurement were also analysed with annealing temperature.

• 대한족부족관절학회지
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• 제16권3호
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• pp.156-161
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• 2012

Brachymetatarsia is a rare congenital deformity which occurs most commonly in the fourth metatarsal. Most common purpose of surgery is to make a normal metatarsal parabola for better external appearance as well as physiological load bearing under the metatarsal heads. Common surgical treatment for brachymetatarsia is lengthening of short metatarsal either by one-stage lengthening with intercalary bone graft or gradual lengthening by distraction osteogenesis. Sometimes shortening of long metatarsal is combined with lengthening of the short metatarsal. The function of the foot is diminished due to diverse complication accompanying lengthening of the metatarsal, therefore preoperative consultation about the functional result is essential.