• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.11a
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• pp.99-104
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• 2006

As a main concern of social and cultural discussionin this era, this essay will be mentioned about that considering of the cogitation system of Post-structuralism and Influences on the contemporary residential space. It is redefined, analyzed and patternized the meanings of the nomadic space from Post-structuralism and diagram which is a intermediate element of the contemporary architectureby understanding of the philosophical and reappearing similarities in that. The aim of this study is that making theoretical basis for the construction of various modern residential space.

• Bulletin of the Korean Space Science Society
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• 2004.04a
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• pp.24-24
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• 2004

Using stellar population synthesis techniques, we explore the photometric signatures of white dwarf progenitor dominated galactic halos, in order to constrain the fraction of halo mass that may be locked-up in white dwarf stellar remnants. We first construct a 10＾9 M_sun stellar halo using the canonical Salpeter initial stellar mass distribution, and then allow for an additional component of low-and intermediate-mass stars, which ultimately give rise to white dwarf remnants. (omitted)

• Korean Journal of Computational Design and Engineering
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• v.14 no.4
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• pp.217-224
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• 2009

Most divide-and-conquer implementations for Delaunay triangulation utilize quad-edge or winged-edge data structure since triangles are frequently deleted and created during the merge process. How-ever, the proposed divide-and-conquer algorithm utilizes the array based data structure that is much simpler than the quad-edge data structure and requires less memory allocation. The proposed algorithm has two important features. Firstly, the information of space partitioning is represented as a permutation vector sequence in a vertices array, thus no additional data is required for the space partitioning. The permutation vector represents adaptively divided regions in two dimensions. The two-dimensional partitioning of the space is more efficient than one-dimensional partitioning in the merge process. Secondly, there is no deletion of edge in merge process and thus no bookkeeping of complex intermediate state for topology change is necessary. The algorithm is described in a compact manner with the proposed data structures and operators so that it can be easily implemented with computational efficiency.

• Bulletin of the Korean Space Science Society
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• 2010.04a
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• pp.27.1-27.1
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• 2010

The Na-O anticorrelation seen in almost all globular clusters ever studied using high-resolution spectroscopy is now generally explained by the primordial pollution from the first generation of the intermediate-mass AGB stars to the proto-stellar clouds of the second generation of stars. Using the recent data by Carretta and his collaborators, the different shapes of the Na-O anticorrelations for RGB stars brighter than and fainter than the red giant branch bump can be clearly seen. If the elemental abundance measurements by Carretta and his collaborators are not greatly in error, this variation in the Na-O anticorrelation against luminosity indicates an internal deep mixing episode during the ascent of the low-mass RGB in globular clusters. Our result implies that the multiple stellar population division scheme solely based on [O/Fe] and [Na/Fe] ratios of a globular cluster, which is becoming popular, is not reliable for stars brighter than the RGB bump.

• Journal of The Korean Astronomical Society
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• v.52 no.5
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• pp.145-158
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• 2019

We conducted a survey of open clusters within 1 kpc from the Sun using the astrometric and photometric data of the Gaia Data Release 2. We found 655 cluster candidates by visual inspection of the stellar distributions in proper motion space and spatial distributions in l - b space. All of the 655 cluster candidates have a well defined main-sequence except for two candidates if we consider that the main sequence of very young clusters is somewhat broad due to differential extinction. Cross-matching of our 653 open clusters with known open clusters in various catalogs resulted in 207 new open clusters. We present the physical properties of the newly discovered open clusters. The majority of the newly discovered open clusters are of young to intermediate age and have less than ~50 member stars.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.1
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• pp.83.1-83.1
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• 2011

We report multi-epoch, simultaneous 22 GHz water and 44 GHz Class I methanol maser line survey towards 180 intermediate-mass young stellar objects, including 14 Class 0, 19 Class I objects, and 147 Herbig Ae/Be stars. We detected $H_2O$ and $CH_3OH$ maser emission towards 16 (9%) and 10 (6%) sources with one new $H_2O$ and six new $CH_3OH$ maser sources. The detection rates of both masers rapidly decrease as the central (proto)stars evolve, which is contrary to the trends in high-mass star-forming regions. This suggests that the excitations of the two masers are closely related to the evolutionary stage of the central (proto)stars and the circumstellar environments. $H_2O$ maser velocities deviate on average 9 km s-1 from the ambient gas velocities whereas $CH_3OH$ maser velocities well match with. For both maser emissions, large velocity difference (${\mid}v_{H2O}-v_{sys}{\mid}\;>\; 10kms^{-1}\; and\;{\mid}v_{CH3OH}-v_{sys}{\mid}\;>\;1kms^{-1}$) is mostly confined to Class 0 objects. The formation and disappearance of $H_2O$ maser lines are frequent and the integrated intensities of them change up to two orders of magnitude. In contrast, $CH_3OH$ maser lines usually show no significant change in the intensity, shape, and velocity. This consistent with the previous suggestion that $H_2O$ maser emission originates from the base of an outflow while 44 GHz Class I $CH_3OH$ maser emission arises from the interaction region of the outflow with the ambient gas. The isotropic maser luminosities are well correlated with the bolometric luminosities of the central the objects. The fitted relations are $L_{H2O}=1.71{\ast}10^{-9}(L_{bol})^{0.97}$ and $L_{CH3OH}=1.71{\ast}10^{-10}(L_{bol})^{1.22}$.

• Tunnel and Underground Space
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• v.23 no.3
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• pp.219-227
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• 2013

Although Mohr-Coulomb failure criterion has limitations in that it is a linear criterion and the effect of the intermediate principal stress on failure is ignored, this criterion has been widely accepted in rock mechanics design. In order to overcome these shortcomings, the Hoek-Brown failure criterion was introduced and recently a number of 3-D failure criteria incorporating the effect of the intermediate principal stress on failure have been proposed. However, in many rock mechanics designs, the possible failure of rock mass is still evaluated based on Mohr-Coulomb criterion and most of practitioners are accustomed to understanding the strength of rock mass in terms of the internal friction angle and cohesion. Therefore, if the equivalent Mohr-Coulomb strength parameters of the advanced failure criteria are calculated, it is possible to take advantage of the advanced failure criteria in the framework of the Mohr-Coulomb criterion. In this study, a method expressing the tangential Mohr-Coulomb strength parameters in terms of the stress invariant is proposed and it is applied to the generalized Hoek-Brown criterion and the HB-WW criterion. In addition, a new approach describing the geometric meaning of the ${\sigma}_2$-dependency of failure criteria in 3-D principal stress space is proposed. Implementation examples of the proposed method show that the influence of the intermediate principal stress on the tangential friction angle and cohesion of the HB-WW criterion is considerable, which is not the case for the 2-D failure criterion.

• Journal of the Korean housing association
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• v.24 no.2
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• pp.25-33
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• 2013

The purpose of this study was to compare the differences between two types of wall removal projects. One was the case that removed one side wall of the apartment in Daegu, another was the instance that eliminated the walls between two apartments in Gimcheon. For this study, the observation method was performed to know the using pattern on the street space, and survey including resident's opinion and satisfaction about result of the project was conducted to gather data. The total number of objects to analysis was 157. The conclusion of this study is as follows. First, when the space was secure from danger of cars, people could access easily. And when it had interesting elements, the street space after wall removal was used by residents. Second, the effective method to connect places was to make intermediate space after wall removal project. In this sense, the way can help to improve the level of quality the daily life of residents. Finally, in the apartment-oriented wall removal project, it could supplement the flaw of the detached house-oriented project and effective potentiality for vitalization of community.

• Korean Institute of Interior Design Journal
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• v.20 no.1
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• pp.80-88
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• 2011

Designs of Takashi Sugimoto suggested new concepts on the space after broking out fixed ideas, and attempted spatial expressions differently from existing interior decorations through independent thoughts and new interpretations. It is showing orientalism's influences strongly based on Japanese traditional beauty unlike western country's design trends. Takashi Sugimoto is implementing unique own design viewpoints by using materials in nature rather than artificial ones, and stressing extra ordinary view of the world having been edited with daily life through traditions and local cultures along with recycling old daily goods and wastes rather than pursuing modem and futuristic spatiality. Sugimoto thought that beautiful designs and uncommon ideas could be gotten from simple daily experiences, and thus materialized it with a technique of extraordinary daily life's implementation through such design viewpoints. Also, He pursues designs in which dense communications are made variously between spaces, space and user, and this becomes design techniques having been used mostly in his projects. It creates soft boundaries through using certain objet as an intermediate of doing communication or erasing physical boundaries, and then induces close communication within the space. This design viewpoints and techniques of Takashi Sugimoto have directed own discriminated designs nowadays.

• Journal of the Korean Institute of Rural Architecture
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• v.10 no.3
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• pp.9-18
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• 2008

The study was intended to suggest the design alternatives of rural village community center based on the design directions which were derived from the previous research, and to evaluate the alternatives by rural residents. The previous research was carried out to grasp the conditions and user's needs of rural village community center. The subjects were 100 residents who lived in rural area in Chonlabukdo. The interview was carried out using a questionnaire with model and isometrics of two alternatives, which showed floor plan and building shape. The subjects evaluated positively both of two alternatives, but slightly more preferred alternative | because of a spacious diningroom and an indoor toilet. The size of a livingroom and entrance, indoor toilet space/location, storage space and deck were significant elements in two alternatives according to t-test. They responded that both of indoor and outdoor toilet should be planned in rural village center. Also, each toilet and room for man and woman should be separated. Entrance space should be enough to take on/off their shoes in a sitting position and deck space was planned to intermediate between indoor and outdoor space.