• 한국가구학회지
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• 제25권3호
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• pp.233-237
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• 2014

The eco-friendly preservatives such as ACQ or CUAZ have been used in landscape architectural facilities these days. In this study, the decay efficacies of ACQ treatments were evaluated according to domestic veneer species, concentration of ACQ, weathering test, adhesive type, and fungus type. In case of veneer species, hinoki cypress and yellow poplar showed the highest and lowest decay resistance, respectively. And the decay resistance appeared to be greater in plywoods bonded by resorcinol resin-bonded plywood and non-weathering treated plywood than polyurethane resin-bonded plywood and weathering treated plywood.

• 천문학회보
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• 제39권1호
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• pp.36.1-36.1
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• 2014

The correlation between mass of Type Ia Supernova (SN Ia) host galaxies and Hubble residual is now well-established. The origin of this relation, however, is yet to be understood. We have used low-resolution spectra of early-type hosts from YONSEI (YOnsei Nearby Supernovae Evolution Investigation) project to measure central velocity dispersion and Lick/IDS absorption indices. By using the Evolutionary Population Synthesis (EPS) models, luminosity-weighted mean age and metallicity of host galaxies were determined from $H{\beta}$ and absorption lines. Here we will discuss the correlation between the velocity dispersion, which indicates the mass of galaxies, and mean age of stellar population in our sample of early-type host galaxies.

• 한국태양에너지학회 논문집
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• 제30권3호
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• pp.39-46
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• 2010

This study is focused on the effect of thermal load according to the various plan types in tower-type apartment in Korea. So, we chose the '』' type model in order to analyze the shading effect of the plan type. The main results are as follows. In chosen model, cooling energy demands are more sensitive than heating ones when is compared with the two methods. And there are about 10% deviations between new and conventional method. Because new method considers more detailed than conventional one about the building geometries. We also found that this building type affects to the about 3 floors from the top and it doesn't affect to the thermal load in lower floors. From these facts, we suggest new modeling method to the similar researches that will be analyzed the thermal load on the tower type apartment in Korea. Also there is no difference of the thermal load in each azimuth between simple and detailed modeling method. Consequently, we judge that this new method considered the shading effect will be used a lot to the similar analysis in tower type apartment in Korea.

• 복식문화연구
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• 제14권5호
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• pp.776-789
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• 2006

The purpose of this study was to investigate the relationships between lifestyle types, demographic variables, and clothing consumption orientations of male and female adolescents. The method of this study was a survey research by using questionnaires. Subjects were 393 high school students in Seoul. Four lifestyle types of adolescents were derived by cluster analysis: 'digital orientation type', 'material orientation type', 'positive enterprise type', and 'achievement orientation type'. The material oriented students spent high expense on clothes, had higher preference of imported products, had more sensuous consumption orientations, did more impulsive buying, and were more influenced by advertisements than other types of students. Digital oriented students had mothers with low educational background, low academic records, spent small expense on clothes, and had less sensuous consumption orientation. There were more male students than female students in positive enterprise type and the students of this type had upper middle academic records, had higher sensuous consumption orientation and did less impulsive buying. There were more female students than male students in achievement oriented type and this type had high academic records, had mothers with high educational background, and spent small expense on clothes. They had low level on most of the clothing consumption orientation and were especially less influenced by advertisement. This research confirms that the clothing consumption orientations are associated with the lifestyle of adolescent.

• Environmental Engineering Research
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• 제7권1호
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• pp.33-37
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• 2002

The two kinds of pellet-type red-mud adsorbents (bead-type, crushed-type) were from red mud, which is generated as a by-product during the production of aluminum hydroxide from bauxite ore. The adsorption experiments of Pb^{2+} ion in the aqueous solution by these red-mud adsorbents were studied with a continuous adsorption ccolumn. As a result, the crushed-type adsorbent shows better performance in adsorption of Pb^{2+} than the bead-type adsorbent between the two types of the pellet-type adsorbents. The continusous adsorption experiment shows that the pellet-type adsorbents made from red mud have good performance for removal of Pd^{2+}. The breakthrough curves of the red-mud adsorbents were compared with that of activated carbon.

• International Journal of Human Ecology
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• 제8권1호
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• pp.109-116
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• 2007

Leisure time is a critical part of modern life and is increasingly important in modern society. Therefore, analyzing expectations and values of leisure and researching leisure practices are integral in measuring the quality of life. In this respect, differences between values and attitudes leading to the ideal leisure life and the actual leisure life could provoke negative influence on our lives, further, decreasing quality of life. Therefore, classifying leisure lifestyle through analyzing value of lifestyle and the actual state of leisure precisely is very necessary. Leisure lifestyle could be very useful standard satisfying various desires and demands related to leisure. In the research, we surveyed 3,000 people over 10 years of age, one on one interview method, asking value of life behaviors (Individualism vs. Collectivism, Pro-Stability vs. Pro-Change, Statistical way of life vs. Active way of life, Family-centered life vs. Work-centered life) and practices of leisure life (With whom, How frequently, Where, For what) in respect to both value and behaviors. Through this survey, five groups of leisure life type have been identified; "Community-oriented Type", "Cocoon Type", "Family-oriented Type", "Personal-stability Type" and "Multiplicity Type". These leisure lifestyles would provide effectual alternatives for reducing gaps between expectations for ideal leisure life and actual life. Furthermore, this could be used for ground work to develop measurements for satisfying various leisure demands.

• 한국항만학회지
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• 제12권2호
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• pp.349-362
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• 1998

Seascape means the scenery which is composed around the sea., Seascape has it's own characteristics compared with landscape and has many important roles in our urban life. Nowadays seascape is being destructed by the development in waterfront area and ocean space. Especially the various kind of buildings which are built in coastal area give great visual impact on seascape. But we have rare research on seascape and no guideline for seascape planning. Before any action against destroying seascape the assessment of seascape has to be preceded. The purpose of this study is to evaluate the representative seascapes which are selected from over 300 slides of various seascapes according to the types of seascapes. We used S.D (Semantic Differential) method with 35 adjective pairs in seven scale to evaluate each seascape. The results can be summarized as follows. 1) Seascapes can be classified as natural type and urban type. The natural type can be divided into beach type and rock-island type. 2) Natural type of seascape is more prefered than urban type. 3)Beach type is the most prefered among seascape types. 4) Natural elements of seascape such as sky, water, sand, trees, forest, mountain, open space, waterfront line, are evaluated as 'good' to see but artificial elements, such as buildings, persons, roads, structures, are evaluated 'bad' to see. 5)As a result of factor analysis five factors(axes) are found out. They are 'wildness', 'vividness', 'preference', 'interest', and 'openness'. These factors can be used for evaluting any seascape.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.333-334
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• 2014

Converters employing IGCTs usually require di/dt snubber and Over Voltage Protection (OVP) circuit for the protection of IGCTs and fast diodes. In these IGCT-based converters, conventional di/dt snubber and OVP circuit dissipates a significant amount of power loss. To reduce this loss of conventional di/dt snubber and OVP circuit, this paper proposes a flyback type snubber circuit with di/dt limiting characteristic for IGCT-based converters in medium voltage wind turbines. This flyback type snubber circuit simply consists of a flyback type transformer and diode. The proposed circuit reduces loss and simplifies conventional di/dt snubber by adopting the flyback type transformer. Loss analysis of conventional di/dt snubber and OVP circuit is performed for the 3-level NPC type back-to-back VSC supplied from grid voltage of 6.9kV. The proposed flyback type snubber circuit can save the loss of conventional snubber circuit in the 3L-NPC type back-to-back VSC in multi-MW MV wind turbine. The proposed snubber circuit has a fewer number of components and improved efficiency leading to a reliable and efficient wind turbine systems.

• 대한수학회지
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• 제54권3호
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• pp.763-772
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• 2017

In this paper, we study the Liouville type theorems for transversally harmonic and biharmonic maps on foliated Riemannian manifolds.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2001년도 추계 학술발표강연 및 논문개요집
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• pp.102-102
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• 2001