• Journal of The Korean Astronomical Society
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• v.38 no.2
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• pp.279-282
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• 2005

We report the millimeter-wave radio observations of molecular cloud cores in Taurus. The observed line is the $N_2H^+$ emission at 93 GHz, which is known to be less affected by molecular depletion. We have compared starless (IRAS-less) cores with star-forming cores. We found that there is no large difference between starless and star-forming cores, in core radius, linewidth, core mass, and radial intensity profile. Our result is in contrast with the result obtained by using a popular molecular line, in which starless cores are larger and less condensed. We suggest that different results mainly come from whether the employed molecular line is affected by depletion or not. We made a virial analysis, and found that both starless and star-forming cores are not far from the critical equilibrium state, in Taurus. Together with the fact that Taurus cores are almost thermally supported, we conclude that starless Taurus cores evolve to star formation without dissipating turbulence. The critical equilibrium state in the virial analysis corresponds to the critical Bonnor-Ebert sphere in the Bonnor-Ebert analysis (Nakano 1998). It is suggested that the initial condition of the molecular cloud cores/globules for star formation is close to the critical equilibrium state/critical Bonnor-Ebert sphere, in the low-mass star forming region.

• Journal of the Korean Institute of Landscape Architecture
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• v.35 no.2 s.121
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• pp.37-48
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• 2007

An exhibit entitled 'Revelatory Landscapes' was held at the San Francisco Museum of Modem Art from May 5 to October 14, 2001. For this Museum's rot off-site outdoor exhibition, five outstanding design teams-Kathryn Gustafson, Hargreaves Associates, Hood Design, Tom Leader Studio, and ADOBE LA-created site-specific installations in Berkeley, Oakland, San Jose, and the San Francisco Bay Area. Each project showcased a hybridization of environmental art and landscape design. The main content revealed through revelatory landscapes were the natural, cultural, and historical palimpsest of the sites-particularly as related to the history of minorities such as Native American, African Americans and Latin Americans-as well as the every day life of ordinary people. To represent these ideas, a juxtaposition of the past and the present was broadly applied. Furthermore, the use of dramatic colors, textures, and forms in consideration of materials coupled with the revelation of natural elements such as wind and sunlight accelerated the effect of this juxtaposition. Every project of the Revelatory Landscapes exhibit requires a phenomenological experience to be appreciated. Via the five senses, these experiences cause a synesthetic experience beyond solely the visual. By examining the projects of 'Revelatory landscapes', the threshold for a new blending between environmental art and landscape design as well as new landscape design strategies that overcome the dichotomy between nature and culture will change and evolve.

• Journal of the Korean Society for Nondestructive Testing
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• v.19 no.4
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• pp.270-276
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• 1999

Fourier transform has been one of the most commonly used tools in study of frequency characteristics of signal. However, based on the Fourier transform. it is hard to tell whether a signal's frequency contents evolve in time or not. Recently, to overcome Fourier transform fault. not to represent non-stationary signal, time-frequency analysis methods are developed and those can represent informations of signal's time and frequency at the same time. In this study we analysed ultrasonic signal for degraded SUS 316 with time-frequency analysis method. In particular the methods such as short time Fourier(STFT) and Wigner-Ville distribution(WVD) were used to extract frequency contents and characteristics from ultrasonic signals.

• Journal of Korea Game Society
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• v.6 no.2
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• pp.33-44
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• 2006

This article examines cultural content distribution system, particularly of game industry based on the development of digital technology. In this period of convergence and fusion, some phenomenon leads the cultural content distribution system change like value transfer from platform to content. In relation to it, especially in the game industry, three types of distribution is categorized by the industrial structure (offline, online, mobile game) through the case studies and it is expected to be evolve into a base for development of distribution integration model in the future. In conclusion, the article suggest the policy subject for the promotion of cultural content that hold so much competitiveness for long-lasting development by the improvement of distribution structure, blowing off the conflict between companies and publishers, and global business, etc.

• Journal of Korea Game Society
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• v.18 no.2
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• pp.47-58
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• 2018

MMORPG started from text-based MUD in the early '80s and had developed a lot of technology to the present. As these technologies evolve, so far, the game has changed in the game centred on male enthusiasts, and the use of players with various tendencies is increasing. As a result, a new phenomenon in the MMORPG virtual space has created. In this paper, MMORPG users are divided into five factors by using Q methodology and studied play about fandom phenomenon. Through this, the player showed the self-expression phenomenon according to the level, and the characteristic that develops from the enjoyment of the gameplay itself to the fandom phenomenon further developed.

• Journal of The Korean Astronomical Society
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• v.28 no.1
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• pp.97-107
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• 1995

The stability of the geometrically thin, two-temperature hot accretion disk is studied. The general criterion for thermal instability is derived from the linear local analyses, allowing for advective cooling and dynamics in the vertical direction. Specifically, classic unsaturated Comptonization disk is analysed in detail. We find five eigen-modes: (1) Heating mode grows in thermal time scale, $(5/3)({\alpha}{\omega})^{-1}$, where alpha is the viscosity parameter and w the Keplerian frequency. (2) Cooling mode decays in time scale, $(2/5)(T_e/T_i)({\alpha}{\omega})^{-1}$, where $T_e\;and\;T_i$ are the electron and ion temperatures, respectively. (3) Lightman-Eardley viscous mode decays in time scale, $(4/3)(\Lambda/H)^2({\alpha}{\omega})^{-1}$, where $\Lambda$ is the wavelength of the perturbation and H the unperturbed disk height. (4) Two vertically oscillating modes oscillate in Keplerian time scale, $(3/8)^{1/2}\omega^{-1}$ with growth rate $\propto\;(H/\Lambda)^2$. The inclusion of dynamics in the vertical direction does not affect the thermal instability, adding only the oscillatory modes which gradually grow for short wavelength modes. Also, the advective cooling is not strong enough to suppress the growth of heating modes, at least for geometrically thin disk. Non-linear development of the perturbation is followed for simple unsaturated Compton disk: depending on the initial proton temperature perturbation, the disk can evolve to decoupled state with hot protons and cool electrons, or to one-temperature state with very cool protons and electrons.

• Journal of the Korean Society of Costume
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• v.65 no.1
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• pp.61-75
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• 2015

This study is analyzes how consumers view the market leading Virtual Wedding Application in order to contribute to the development of the wedding industry in the future. The research consists of the following steps: questionnaires with detailed items were used to develop the application, the wedding application was developed, and questionnaires were used to get consumer responses. The results are as follows: 1) paid application service providing useful information is appropriate for busy consumers. 2) Regular updates regarding wedding trend are needed. 3) Augmented reality or development of HMD based virtual experience programs should be considered as virtual experience technology on smart devices evolve. 4) Wedding consumers want all kinds of instant information to be presented in harmony, so the application should allow consumers to obtain and to purchase information at the same time. 5) The application can help consumers to share the process of total wedding coordination with others around them. 6) Since people's awareness on virtual experience is relatively low, marketing strategies such as identifying the wedding application from other applications should be used as well as promoting useful functions are important.

• Korean Journal of Applied Biomechanics
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• v.12 no.2
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• pp.407-415
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• 2002

Athletic products must meet the needs of athletes and the demands imposed by sports through innovative design. These needs of athletes and requirements of sports are performance, protection and comfort related. In depth knowledge of anatomy and physiology, etiology of commonly reported injuries, and lower extremity mechanics form the basis of product creation/engineering. Game analysis which entails time and frequency surveys of the skills performed during a game, interviews with athletes and coaches, and discussions with medical staffs are used to identify the skills that are critical to the needs of athletes. In lab full biomechanical analyses of these skills and/or physiological responses of the athletes lead to clear functional criterions that serve as guidelines to be met by the design team. The concepts created by the design team are in turns subjected to the same battery of biomechanical analyses. The learning gathered through this pluridisciplinary process is used to further evolve design concepts. The evolution-testing loop is repeated until biomechanical and/or physiological, mechanical and perceptual tests indicate that the design concept meets the established functional design criterions. At that time, the design concepts is ready for manufacturing research and development. Additional biomechanical and physical tests are performed through that phase to confirm that the manufacturing processes preserve the functionality of the design concept. Durability and long term performance of production samples are evaluated through a final three month long weartest program. A rigorous research/testing program is crucial to create and engineer sport products that meet the performance, protection.

• Journal of Chest Surgery
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• v.15 no.2
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• pp.222-229
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• 1982

The aneurysmal dilatation of ascending aorta with the aortic regurgitation presents typical surgical problems. Over the years, various surgical procedures had been used for the management of the dilated segment of sending aorta and the aortic regurgitation. The surgical technique Is still in the state of evolution. The one method is the super coronary replacement of the ascending aorta with vascular graft and replacement of the aortic valve with preservation of the coronary ostia as advocated by Miller and his colleague at Stanford University, so called conventional technique". The other is the replacement of aortic valve and the dilated segment of the ascending aorta using a composite graft and transplantation of the coronary ostia as described by Bentall and DeBono in 1968. The controversy appears to evolve around 3 technical problems. One is bleeding from the grafted area. Two is later development of the aneurysmal dilatation of the subcoronary aortic wall when non-composite graft is employed. Three is a management of the coronary arteries. The purpose of this article is to present our experience with 7 cases of annuloaortic ectasia in whom both of these surgical techniques at that employed and to review some of the problems that encountered during the management of these patients .

• Journal of the Korean Home Economics Association
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• v.47 no.9
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• pp.55-69
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• 2009

The purpose of this research was to analyze scolding experiences of three parents with children of same gender. For this research, a narrative inquiry was used as the research method. The research results showed that scolding toward children and scolding from parents resembled each other while the experiences of the three parents regarding scolding were revealed as the following four larger themes and three smaller themes: mimicking the scolding of their parents (taking on the parental role toward the projected, internal self of the past, acceptance of familiarity, providing a safety fence to the children), transforming the scolding of their parents, projecting the unsolved task of parenting to children, beginning to transform and evolve scolding, and cautious practice within daily living. In the discussion, methods for transforming and evolving scolding based on experiences of the three parents regarding scolding were studied, while research on parents scolding children with differing genders and how positive experience such as praising, encouragement, and support, from parents reemerged within children are suggested.