• Journal of the Korean Ceramic Society
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• v.30 no.11
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• pp.919-924
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• 1993

Domain structure and the spatial arrangement of tetragonal and rhombohedral phases in PZT ceramics at MPB composition were investigated with a transmission electron microscope. Fringe Contrast and doublet spot splitting were observed in the image mode and the selected area diffraction pattern, respectively. Besides, triplet spot splitting was also observed in the other part of the specimen. These observations indicate that both the single phase regions and the regions which are comosed of alternatively arranged tetragonal and rhombohedral domains coexist in a PZT ceramics at the MPB composition.

• 한국가시화정보학회:학술대회논문집
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• 2006.12a
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• pp.78-85
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• 2006

Flows around two oscillating cylinders in side-by-side arrangement at Re=185 are simulated using immersed boundary method. The cylinders oscillate vertically with prescribed sinusoidal function in opposite directions in uniform cross-flow. Flow patterns and drag & lift forces are described by varying distance between two cylinders and oscillating frequency. Time series of flow patterns are investigated along with corresponding drag k lift coefficients.

• Journal of Mechanical Science and Technology
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• v.17 no.7
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• pp.966-977
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• 2003

This paper investigates how intentional mistuning of bladed disks reduces their sensitivity to unintentional random mistuning. The class of intentionally mistuned disks considered here is limited, for cost reasons, to arrangements of two types of blades (A and B, say). A two-step procedure is then described to optimize the arrangement of these blades around the disk to reduce the effects of unintentional random mistuning. First, a pure optimization effort is undertaken to obtain the pattern (s) of the A and B blades that yields small/the smallest value of the largest amplitude of response to a given excitation in the absence of unintentional random mistuning using Genetic Algorithm. Then, in the second step, a qualitative/quantitative estimate of the sensitivity for the optimized intentionally mistuned bladed disks with respect to unintentional random mistuning is performed by analyzing their amplification factor, probability density function and passband/stopband structures. Examples of application with simple bladed disk models demonstrate the significant benefits of using this class of intentionally mistuned disks.

• The Korean Journal of Cytopathology
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• v.12 no.1
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• pp.31-37
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• 2001

Whlie cytologic characteristics of squamous dysplasia, carcinoma in situ, and invasive squamous cell carcinoma of the uterine cervix are well documented, relatively few studios have dealt with the cellular features of microinvasive carcinoma. In order to describe the cellular characteristics of microinvasive squamous cell carcinoma, we retrospectively reviewed 45 cervovaginal smears(15 carcinoma in situ, 15 microinvasive cancer, 15 invasive cancer) which were confirmed by histologic examination of specimens obtained by hysterectomy at the Seoul National University Hospital during S years from 1995 to 1999. The cytologic features about tumor diathesis, inflammatory background, ceil arrangement, anisonucleosis, nuclear membrane irregularity, nuclear chromatin pattern, and nucleoli were observed. The cytologlc characteristics of microinvasive squamous cell carcinoma of the uterine cervix are syncytial pattern, mild tumor diathesis, the irregularity of nuclear membrane, irregularly distributed nuclear chromatin, and occurrence of micronucleoli. But, correlation between the depth of Invasion and the cytologic feature had limited value.

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.845-847
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• 2009

In thecate dinoflagellates, the thecal plate pattern has been considered to be important criteria in their classifications. Due to this fact the shape of the theca and the arrangement of the theca were studied. In the pictures, the distinctions between the plates in the cells were so vague that I drew a diagram to illustrate the plate pattern. To identify the genus Protoperidinium, the shape of the first apical plate and the second anterior intercalary plate were used. Depending the shape of first apical plate, will be designated as meta(4), meta(5), para(4), para(5) or para(6). The shape of first apical plate is considered an important factor. From this point of view, the genus Protoperidinium as a group of planktonic protist in the coastal environment was classified.

• Journal of Ocean Engineering and Technology
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• v.20 no.2 s.69
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• pp.29-35
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• 2006

The flow patterns around multi-circular cylinders are studies, in order to obtain a global view on the structure of wave control and circulation of sea flow in coastal region. The flow force depends upon the vortex shedding exerted on the structure, especially how the vortex shedding affects the erosion when the structure sets on the sand bottom. Therefore, it is necessary that the flow pattern be hocked. In order to simulate the flow around multi-circular cylinders, the CFX and FLUENT of the computational fluid dynamics (CFD) program were used and compared with the experimental results of the flow visualization installation. The phenomena of flow around the multi-cylinders will be applied to fundamental data for predicting the flow force acting against the structure, erosion and sedimentation around cylinders in arrangement.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2003.11a
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• pp.259-264
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• 2003

This study aims to understand the architectural characteristics and living pattern of the Daor and to make a comparative study with the Han race. This research inquired into the background of the Daor and surveyed the present condition of traditional houses. As a result of this study, the features of Daor's traditional house is synthesized as follows. 1) The arrangement of village is in a row facing south. The site plan and exterior shape is like as the Manchurian race. 2) Making west window and creating a bright atmosphere is the unique architectural style. 3) Viewed from spatial layout and function, Daor's has more remarkable difference from Han's. That is to say, the room equipped with Kang is daily space and kitchen is just space for cooking in contrast with the Han.

• Proceedings of the Korean Institute of Interior Design Conference
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• 1999.04a
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• pp.126-132
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• 1999

The purpose of this study is to advance apartment houses in quality as a residence through revitalization of tradition and the procedures are as follows: The first procedure is theoretical contemplation. The second procedure is analysis of the traditional residential space that gives a starting point of introspection of it without cease at the stage of formal following or pattern application in revitalizing tradition in the apartment houses. And the third procedure is to select and suggest aspects applicable to developing Korean style apartment houses. The suggest is embodied by a plane figure of 55 pyong type apartment house after selecting the concrete development aspects with approaches such as arrangement and interior space analysis, behavior analysis and space division and design analysis. This study has its meaning in that it suggests a possibility of various approaches other than formal following or pattern application in revitalizing tradition in a new Korean type apartment house, that it gives another selection to diversifying consumers' patterns and that it helps recognize and develop our tradition in this age of cultural nationalism.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.277-282
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• 2004

A Study traditional folk house and primary factor from investigation of Wang-Gok villages space composition program which is contains regional color, economy, rationality. From that's all, Analysis the effect of modern life style to folk house space pattern change and a primary factor of northern traditional fork house type of Korea. 1. Analysis and arrangement space composition structure about natural${\cdot}$geographical${\cdot}$cultural environment. 2. Examination existing commoner's house research by a region, space program for understanding house pattern, specially double rows which are partitioned by walls in northern part of Young-Dong region. 3. Analysis folk house character and object house information. by the way, Investigation changing of commoner's house space program with modem life style.

• Journal of Korean Academy of Nursing
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• v.29 no.1
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• pp.107-116
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• 1999

The purpose of this study was to determine the effects of loneliness on drinking, smoking, and health perception (symptom pattern & subjective health) in college students. The convenience sample consisted of 417 college students attending four universities. The Revised UCLA Loneliness Scale(RULS) and the Symptom Pattern Scale were used to collect the data. In this study, 84.7% of the subjects used alcohol, with a mean of 5.52 drinks per week, and 32. 9% of the subjects smoked for a mean of 5.08 cigarette packs per week during the previous month. The mean score loneliness measured by the RULS was 40.82, indicating that the subjects were moderately lonely. The majority of the subjects had a low level of symptom pattern and evaluated their health as either very good or good. The level of alcohol drinking and the smoking increased and symptom pattern decreased with age. Female students were lonelier than male students in this study. Also, the female students had a lower level of symptom pattern and evaluated their health worse than the male students. Male students consumed more alcohol and smoked more cigarette than female students. Living arrangement was significantly related to the level of loneliness. The subjects who lived with their parents and siblings were less lonely than those who lived with their friends, or relatives or who lived in a dormitory. Age and religion were not related to the level of loneliness. The level of loneliness influenced drinking, symptom pattern, and subjective health. The study found that subjects who were more lonely consumed alcohol less, had a higher level of symptom pattern, and perceived their health worse than those who were less lonely. Smoking was not influenced by loneliness in this study.