• Progress in Superconductivity and Cryogenics
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• v.5 no.1
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• pp.31-34
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• 2003

Bi-2223 superconducting wires with 55 filaments were fabricated by stacking, drawing process with different heat-treatment histories. Two kinds of powders were prepared. One was pre-annealed at 760-820 $^{\circ}C$ and low oxygen partial pressure, and the other was only calcined state. Before rolling process, round wires were pre-annealed at 760 -820 $^{\circ}C$ and in a low oxygen partial pressure. We confirmed that pre-annealing step was to transform Bi-2212 orthorhombic structure from Bi-2212 tetragonal structure and to reduce the formation of second phases at superconducting wire. However Bi-2223 phases were formed at higher pre-annealing temperature. Bi-2223 conductor was needed frequently annealing at low temperature because pre-annealing at precursor powder brought about decrease in workability. We could achieve highest Je of 6500 A/$\textrm{cm}^2$ at the tape using Bi-2212 orthorhombic phase by introduced slightly overheating at the 1st sintering process.

• Journal of the Korean Society of Costume
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• v.64 no.1
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• pp.45-63
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• 2014

In the Taenghwa(Buddhist paintings), the clothing habits of the times can be observed since it depicts the lives of people from all walks of life. These 16th century Taenghwas were drawn based on the understanding of the ritual costumes of early Joseon dynasty appearing in works such as oryeui Se-jong-sil-lok; Sejong chronicles and Gyong-guk-Dae-jon. It shows the perception of various types of clothing such as the Myeon-Bok(King's Full Dress), Won-yu-gwan-bok(King's Ceremonial Dress), and Gon-ryong-po(royal robe at work), and describes the early King's Won-yu-gwan-bok in the early Joseon dynasty that equips Bang-sim-gok-ryong(Round Neck Band). Various officials' uniforms and various men's coats are described. From it, one can visually verify the records of Joong-jong-sil-lok; Joongjong chronicles that describes the appearances of various hats and coats. They also tell us that Chang-ot(light outer coat) was worn prior to the 17th century. It also shows us that the ritual costume of women in Koryo was passed down to early Joseon. Also, in regards to the Buddhist priest costumes, the jang-sam's gray color and ga-sa's red color has been passed down until today. The most representative characteristic for clothing materials were horsehair, silk, ramie, hemp, and cotton.

• Journal of the Korean Society of Costume
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• v.64 no.4
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• pp.150-161
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• 2014

The purpose of this study was to examine the differences in image perception, and to investigate the differences in age and income inferences according to the wearing of accessories with black dress. A quasi-experimental method was used for this study. The experimental design was a $2{\times}3{\times}3$(necklace${\times}$earrings${\times}$corsage) factorial design. The subjects were 610 female college students residing in Seoul. The model in the stimulus photographs was a woman with straight long hair. She wore a black one-piece dress with round neckline and short sleeves. The findings indicated that the wearing of a necklace enhanced individuality, attractiveness, and cuteness in women. Professionalism and individuality were heightened when she wore an earring. The red corsage enhanced individuality, but it had a negative effect in professionalism. As for the effect on interaction, attractiveness was more highly perceived when both necklace and large earrings were worn without a corsage. The absence of both necklace and earrings led to a low perception of professionalism, attractiveness, and individuality. The wearing of a necklace was more strongly linked to older age and high income than not wearing it, and it was perceived as more youthful if earrings were not worn. As for interactions, the wearing of small earrings and a red corsage was linked to the oldest age.

• The Korean Journal of Cytopathology
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• v.9 no.2
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• pp.181-185
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• 1998

Polymorphous low grade adenocarcinoma(PLGA) is a rare malignant tumor of the salivary gland. It is characterized by diverse histology, bland-locking cytology indolent behavior and favorable prognosis. The fine needle aspiration cytologic features of PLGA are described. The aspirates from the hard palate in a 33-year-old woman showed cellular smear composed of monotonous small round to oval cells with scanty cytoplasm. Papillary, tubular and cell ball arrangements with characteristic dense stromal spheres were recognized. PLGA could be suggested by fine needle aspiration cytology, if one encountered cellular smear with various architectures and uniform bland-locking cytologic feature.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.28 no.8 s.227
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• pp.887-894
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• 2004

A technique of mixing enhancement by using an elliptic jet screech reflector has been examined experimentally in an underexpanded sonic round jet where jet screech tone is generated. Since jet screech is known to enhance jet spreading, a reflector was designed to focus jet screech waves near the nozzle lip at an underexpanded jet. The reflector has an elliptic cross section of which one focus is located near the nozzle lip and the other in the jet screech source region in a plane including the jet axis. In the jet with the elliptic reflector, the mass flow rate showed a significant increase in the jet entrainment when compared to that for the small disk reflector. This was attributed to the increased screech amplitude near the nozzle lip as well as the mode change of the jet. The jet mixing was also increased by the amplified jet screech at two other underexpanded jets, but the jet oscillation mode did not change.

• Applied Microscopy
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• v.20 no.2
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• pp.71-80
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• 1990

It was investigated the morphological changes of differentiating epidermal cells in chick embryos. Ectodermal cells at 3 days after incubation were cuboidal, their nuclei were large, and rough endoplasmic reticulum and mitochondria were distributed in the cytoplasm. At 5 days after incubation, there were periderm and one basal layer in epidermis. The cells of basal layer were columnar, their nuclei were round, and rough endoplasmic reticulum and free ribosomes were developed. Also, peridermal cells were flat, chromatins were partially condensed and glycogen particles were abundant. No periderm showed and cells of basal layer formed intermediate layer at 9 days after incubation. Basal cells of intermediate layer were cuboidal, neighboring cells were anchored by desmosomes and tonofibrils and free ribosomes were evenly scattered. At 15 days after incubation, stratum corneum and stratum germinativum were distinguished. In cells of stratum germinativum, tonofibrils, free ribosomes and desmosomes were well developed. And then, the shedding of stratum corneum were showed at 17 days after incubation and stratum corneum were well developed after hatching.

• Development and Reproduction
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• v.17 no.3
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• pp.247-255
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• 2013

The gonadsomatic index (GSI) of mottled skate was the highest in April, GSI and HSI showed a reverse phase for its reproductive cycle. The fish had one pair of egg capsules, having 1 to 7 fertilized eggs, and spawned all the year round. When surveying the reproductive characteristics of females over 63 cm in disc width, we found the spawning peak was between April to June, and the appearance ratio of egg capsules was the highest in May (32.1%). The eggs were hatched at $8^{\circ}C$, $13^{\circ}C$, $18^{\circ}C$, water temperature (12.8 to $24.2^{\circ}C$), and the best hatching temperature was $18^{\circ}C$. The number of fish hatched was 4 to 5 fish/egg capsules, and the hatching rate was 100%. The sex ratios of hatching larvae were 45.5% female and 54.5% male. Therefore this study will provide fundamental data and information for artificial reproduction of the mottled skate.

• Journal of the Korean Society for Heat Treatment
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• v.8 no.3
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• pp.213-221
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• 1995

Temperature distribution, transformation and residual stresses generated during the quenching process of carbon steel. It follows many difficulties in the analytical considerations on those quenching process because of the coupling effects on temperature and metallic structures. In this paper one of the basic study on the quenching stresses was carried out for the case of the round steel bar specimen(SM45C) with 40mm both in its diameter and length. The temperature distributions considering strain hysteresis were numerically calculated by finite element technique. In calculating the transient temperature field, the heat flux between water and rod surface was determined from the heat transfer coefficient. The gradient of temperature is almost same to geometric of specimen. At early stage of the quenching process, the abrupt temperature gradient has been shown in the surface of the specimen.

• The Korean Journal of Cytopathology
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• v.9 no.1
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• pp.111-115
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• 1998

Although the characteristic cytologic features of melanoma have been well described the diagnosis of metastatic melanoma by fine needle aspiration cytology (FNAC) may be difficult in the case of amelanotic melanoma and in the absence of awareness of clinical history. Furthermore, when the breast is the site of initial presentation, it could simulate a primary breast carcinoma leading to misdiagnosis. The recognition of metastatic malignant melanoma in FNAC material is essential to avoid an unnecessary mastectomy and to ensure appropriate chemotherapy. We experienced a case of metastatic melanoma of breast which presented as solitary breast mass in a 56-year-old woman. She had a history of surgical excision of right foot for melanoma one year ago. The cytologic smears were composed of noncohesive epithelioid cells with round or eccentric nuclei, bi-or multi-nucleation, prominent nucleoli, fine chromatin, and intranuclear inclusions. The cytoplasm of tumor cells had scanty melanin pigment but were diffusely positive for S-100 protein.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.517-520
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• 2005

Noise mapping covers the whole mapping process from the collection of raw data, storage and retrieval of the data for computation/modeling, to the presentation of information related to outdoor sound levels, sound exposure, noise effects or numbers of affected person. This presentation can be in either a graphical or numerical form. In Europe, the Directive 2002/49/EC of the European Parliament and of the Council relating to the assessment and management of environmental noise is now being implemented in the EU Member States. Here, The first maps for major areas are required by mid 2007, and action plans required one year later. These activities are repeated at five yearly intervals and all defined areas are incorporated in the following round of deadlines starting in 2012. The above are minimum requirements and some countries are expected to go further and faster. In this study, present status of domestic and international noise maps has been introduced to implemente the Korean noise map standard. This will help to get more convenient and, more fair result, and produce correct map at domestic level.