• The Bulletin of The Korean Astronomical Society
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• v.42 no.1
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• pp.29.1-29.1
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• 2017

I present new near-infrared (NIR) photometry of globular cluster (GC) systems associated to a cD galaxy NGC 4874 in the core of the Coma cluster and 16 early-type galaxies in the Fornax and Virgo clusters of galaxies using the Infrared Channel of the Wide Field Camera 3 (WFC3/IR) on board the Hubble Space Telescope (HST). Combining these high-resolution NIR data with new HST Advanced Camera for Surveys (ACS) optical photometry for NGC 4874 and existing ACS GC catalogs from the ACS Fornax and Virgo Cluster Surveys, I have examined for the first time the GC systems in a statistically significant optical/NIR sample of galaxies spanning a wide range of luminosities and colors. A primary goal of this study is to explore empirically whether the distributions of purely optical and hybrid optical - NIR color indices for extragalactic GCs have different forms and whether the relations between these color indices are nonlinear, indicating that they behave differently with underlying metallicity. I find that some GC systems of large galaxies in our sample show color bimodalities that differ between the optical and optical - NIR colors, in the sense that they have disparate ratios of "blue" and "red" peak GCs, as well as differing ratios in their color dispersions. Consistent with these results, I find empirically that the dependence of hybrid optical-NIR color on purely optical color is nonlinear, with an inflection at intermediate metallicities. These findings underscore the importance of understanding the nature of galaxy-to-galaxy variations in the GC color distributions and color-color relations, as well as the exact forms of the color-metallicity transformations, in interpreting the observational data on GC color bimodality. Our ACS data for NGC 4874 shows that its GC system exhibits a very strong blue tilt, implying a very steep mass-metallicity scaling, and the centroid of this GC system is offset by $4{\pm}1kpc$ from the luminosity center of NGC 4874, in the direction of NGC 4872. Finally, I discuss the asymmetrical GC distribution around a dwarf elliptical galaxy in Coma that has a very high relative velocity with respect to the cluster mean at small clustercentric radius.

• Journal of the korean academy of Pediatric Dentistry
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• v.28 no.3
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• pp.496-503
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• 2001

Maxilla overgrowth who diagnosis with skeletal Class II division 1 have transverse and also sagittal problem. If maxillary growth vector is direction to anterior inferior, mandible is rotation to clockwise pattern and it disturbance it's anterior growth. At this time, treatment goal is restrict of maxillary growth to accomplish ideal intermaxillary relation and one of treatment choice is the application of extraoral force. This report is 3 case treated by activator and headgear combination therapy, who diagnosed with skeletal Class II div. 1 malocclusion.

• Human Ecology Research
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• v.51 no.6
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• pp.591-602
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• 2013

This paper aims to explore the role of the home economics subject in helping high school students preparing for an independent aged life and to develop problem based teaching plans toward this goal. Contents related to the elderly in the high school home economics and technology 2007 and 2009 revised curricula were analyzed, and elderly-related contents in other subject areas (the 2009 revised curricula of ethics, public health, and social studies) were also comparatively analyzed to determine the identity of the home economics subject in relation to preparation for independent aging. Based on these analysis, five subjects and teaching plans were presented: the aging society and population changes, the characteristics of the elderly, individual preparation for aging, care of the elderly, and welfare services for the elderly. The ultimate objectives of the lessons were, through critical reasoning, to inquire into the causes of current problems the elderly face so that teenagers can understand aging societies and the elderly and to seek reasonable alternatives for teenagers as they prepare for successful and independent aging, increasing their problem-solving abilities in choosing the best course of action by considering the ripple effect of consequences of each of those alternatives. Suggestions on what direction elderly-related education should take in the future, and what roles teachers should take are also provided.

• Korean Journal of Human Ecology
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• v.18 no.3
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• pp.583-595
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• 2009

The study was to see if the perceptions of pre-service kindergarten teacher toward the education of children's fundamental habit would show different characteristics based on their school type, education learning experience, and practicum experience. Subjects were 200 students majoring in early childhood education who were attending 3-year colleges and 4-year universities in Jellabuk-do and Daejeon. Preceding researches were referenced to develop questionnaire for the research method. The collected data was analyzed through t-test and Chi-square test. The followings are results: First, the interest in education showed significant difference in school type, but not significant difference in education learning experience and practicum experience. Second, the recognition in educational goal showed significant difference in practicum experience, but not significant difference in school type and education learning experience. the educational content showed significant difference in education learning experience, but not in school type and practicum experience. the recognition in educational principal showed significant difference in school type, but not significant difference in education learning experience and practicum experience. the recognition in educational method showed no significant difference in school type, education learning experience and practicum experience. Third, the recognition in educational hardship toward teaching showed significant difference in school type, education learning experience and practicum experience. The results of study would provide the righteous cognitive establishment of children's fundamental habit education and serve the appropriate guidelines being professor for our perspective kindergarten teachers. Also, they would be utilized as basic information to plan the direction of children's fundamental habit education to develop the program of children's life guidance.

• Journal of Power Electronics
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• v.18 no.3
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• pp.702-713
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• 2018

Power loss reduction and total harmonic distortion(THD) minimization are two important goals of improving three-level inverters. In this paper, an optimized pulse width modulation (PWM) strategy that can reduce switching losses and balance the neutral point with an optional THD of three-level neutral-point-clamped inverters is proposed. An analysis of the two-level discontinuous PWM (DPWM) strategy indicates that the optimal goal of the proposed PWM strategy is to reduce switching losses to a minimum without increasing the THD compared to that of traditional SVPWMs. Thus, the analysis of the two-level DPWM strategy is introduced. Through the rational allocation of the zero vector, only two-phase switching devices are active in each sector, and their switching losses can be reduced by one-third compared with those of traditional PWM strategies. A detailed analysis of the impact of small vectors, which correspond to different zero vectors, on the neutral-point potential is conducted, and a hysteresis control method is proposed to balance the neutral point. This method is simple, does not judge the direction of midpoint currents, and can adjust the switching times of devices and the fluctuation of the neutral-point potential by changing the hysteresis loop width. Simulation and experimental results prove the effectiveness and feasibility of the proposed strategy.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.123-133
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• 2008

This dissertation is a web-based cyber exhibition website and a clear difference between the general framework of the development breaks out, the cyber exhibition framework can be a model for the purpose of the proposal. The basic elements that comprise the exhibition model is archives layer, exhibit layer, and experience layer for the three-layer planed. In fact, the model has been applied throughout the analysis of cases with the application of the model presented, while others are considering goal direction also suggests the development of a cyber exhibition. If you take advantage of the cyber model of development brilliant display of the content rather than technology-driven 'material and value+media and CT' to the convergence of content through their own cyber exhibition area can expect to be recognized.

• Archives of Plastic Surgery
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• v.41 no.4
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• pp.407-413
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• 2014

Background Implant malposition can produce unsatisfactory aesthetic results after breast augmentation. The goal of this article is to identify aspects of the preoperative surgical planning and intraoperative flap fixation that can prevent implant malposition. Methods This study examined 36 patients who underwent primary dual plane breast augmentation through an inframammary incision between September 1, 2012 and January 31, 2013. Before the surgery, preoperative evaluation and design using the Randquist formula were performed. Each patient was evaluated retrospectively for nipple position relative to the breast implant and breast contour, using standardized preoperative and postoperative photographs. The average follow-up period was 10 months. Results Seven of 72 breasts were identified as having implant malposition. These malpositions were divided into two groups. In relation to the new breast mound, six breasts had an inferiorly positioned and one breast had a superiorly positioned nipple-areolar complex. Two of these seven breasts were accompanied with an unsatisfactory breast contour. Conclusions We identified two main causes of implant malposition after inframammary augmentation mammaplasty. One cause was an incorrect preoperatively designed nipple to inframammary fold (N-IMF) distance. The breast skin and parenchyma quality, such as an extremely tight envelope, should be considered. If an extremely tight envelope is found, the preoperatively designed new N-IMF distance should be increased. The other main cause of malposition is failure of the fascial suture from Scarpa's fascia to the perichondrium through an inframammary incision. As well, when this fixation is performed, it should be performed directly downward to the perichondrium, rather than slanted in a cranial or caudal direction.

• Journal of Korean Society of Rural Planning
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• v.15 no.4
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• pp.11-17
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• 2009

Rural Amenity Design Competition is opened every year since 2003 having an intention of improving spatial design and planning of rural area through developing values of rural amenity resources and applying in that area. The subject of this competition is broad and there's no limit in locations so that various solutions and original ideas could be proposed. This research examined 165 prizewinning works of the competition and analyzed the locations and areas, aims, main resources, spatial planning contents and experience programs to find out trends of rural spatial design. According to the study, the prizewinning works tends to 1) include spatial plan for an existing village planning, 2) aim rural tourism for citizens and increasement of resident's incomes, 3) develop vegetation and agricultural resources, 4) plan for natural landscape, commercialization of local special productions and agriculture, and 5) propose ecological experience programs. The same theme of the competition repeated every year had led to advanced design skills but also a stagnant of design contents. A subject and a main goal of the Rural Amenity Design Competition should be departmentalized each time hereafter to make for the weak points and propose progressive direction for the rural spatial design.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.5 no.1
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• pp.10-15
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• 2000

Goals, research direction, and operational structure of the Global Ocean Ecosystem Dynamics (GLOBEC), which is co-sponsored by the Scientific Committee on Oceanic Research (SCOR) and the Intergovemmental Oceanographic Commission (IOC), are described. Following the Joint Global Ocean Flux Study (JGOFS) activities on the lower trophic level in ecosystem during 1980s-90s, scientists have considered the responses of the mid and higher trophic levels to the environmental or climate change. The scientific steering committee of the GLOBEC published the implementation plan in 1999, and the IGBP will support the GLOBEC as one of its core projects for 10 years. The GLOBEC programme has four major components: the research foci, framework activities, regional programmes, and integrating activity. The core of GLOBEC research is the four research foci: retrospective analyses, process studies, predictive and modelling capabilities, and feedbacks. Currently, four regional programmes have been undergoing in the world ocean: Southern Ocean GLOBEC (SO-GLOBEC), Small Pelagic Fishes and Climate Changes (SPACC), Cod and Climate Change (CCC), and Climate Change and Carrying Capacity (CCCC). Also, national GLOBEC programmes were already established in 9 nations.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.1
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• pp.149-157
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• 2018

The purpose of this study is to identify important evaluation criteria that need to be prioritized by developing one for the campustown development project in Seoul. To achieve this, we examined the list of initial ideas for the project and selected the criteria that corresponds to the goal of the project. Moreover, we conducted AHP and preference survey to further refine the evaluation criteria. As a result, improvement of walking space and providing urban regeneration base space were found to be most important; utilizing high density mixed land use was rated as least important. Based on the findings, the proposed evaluation criteria can help the process of the project as guidelines. As initial evidence it can also guide us for a future development direction in between the completion of the first project and the start of the second stage of the project.