• Journal of Forest and Environmental Science
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• 제29권2호
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• pp.173-180
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• 2013

Berries of Korean mistletoe (Viscum album var. coloratum [Kom.] Ohwi) contained one seed, which have, in general, one or two embryos but very rarely three embryos. Mucilaginous substances in berries may help them adhere to the branches of host trees. It was observed that seeds need more than one and half years to develop into normal and healthy seedlings from the time of inoculation. Many factors such as adhesion of berry, thickness of host branch, orientation of haustorial root, etc. influenced the successful development of mistletoe plants. Through the application of six-year observation results on the germination of seeds and growth of seedlings, about 80% of germination rate for mistletoe seeds and 61% of survival ratio for germinated seeds, which is more than 23 times higher in natural conditions, were obtained after inoculation of seeds on the one-year-old branches of Malus pumila var. dulcissima and Quercus mongolica trees. The technological aspects of the success can be applied to other host plants and provide a critical clue to an artificial propagation system, for this medicinally valuable genus. This is the first successful report on artificial inoculation and plant development of Korean mistletoe.

• 한국사회복지학
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• 제59권4호
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• pp.63-81
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• 2007

이 연구의 목적은 질적 연구의 한 방법인 미시사 연구 방법을 적용하여 사회복지사가 급여를 받아 살아가는 실상을 파악하는 데 있다. 이 연구를 위해 연구참여자로서 약 13년간 사회복지시설에서 근무한 사회복지사를 선정하여 심층면접을 실시하고, 관련 자료를 수집했다. 자료 분석은 진즈부르그(Carlo Ginzburg)가 명명한 '실마리 찾기'를 실시하여 개념화하고, 이들 개념을 바탕으로 주제묶음을 한 후, 주제묶음에 근거하여 핵심주제를 만들었다. 수집한 자료를 바탕으로 사회복지사의 급여와 관련된 핵심주제로 '정부의 부적절한 대처와 사회의 무관심', '안일함으로 이끌려듦', '박봉으로 여유 없는 생활', '불안하고 자존심 상함', '힘겹게 살며 소박한 삶을 희망함'을 이끌어냈다. 끝으로 연구참여자의 업무는 정부가 수행해야 할 사업임을 빌어 연구 참여자의 부적절한 급여는 헌법에 위배됨을 강조하였다.

• 천문학논총
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• 제30권2호
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• pp.261-263
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• 2015

The metallicity distribution of globular clusters (GCs) provides a crucial clue for the star formation history of their host galaxy. With the assumption that GCs are generally old, GC colors have been used as a proxy for GC metallicities. Bimodal color distributions of GCs observed in most large galaxies have, for decades, been interpreted as bimodal metallicity distributions, indicating the presence of two populations within a galaxy. However, the conventional view has been challenged by a new theory that non-linear GC color-metallicity relations can cause a bimodal color distribution even from a single-peaked metallicity distribution. Using photometric and spectroscopic data of NGC 5128 GCs in combination with stellar population simulation models, we examine the effect of non-linearity in GC color-metallicity relations on transformation of the color distributions into the metallicity distributions. Although in some colors offsets are present between observations and models for the color-metallicity relations, their overall shape agrees well for various colors. After the offsets are corrected, the observed spectroscopic metallicity distribution is well reproduced via modeled color-metallicity relations from various color distributions having different morphologies. We discuss the implications of our results.

• 한국과학교육학회지
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• 제21권4호
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• pp.745-756
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• 2001

이 연구는 개념변화 맥락을 제공하는 개념생태의 상호작용에 관한 사례 연구이다. 사례 연구를 통해, 개념생태를 구성하는 세 가지 특징(개념, 과거 경험, 설명일관성)의 상호작용적 맥락을 구체적으로 제시하고 그 상호작용적 특정이 개념변화를 어렵게 하는데 공헌하고 있음을 밝힌다. 이 연구의 시사점은 크게 세 가지이다. 첫째, 개념 학습을 목표로 하는 교수(teaching)는 특정 과제에 대하여 학생들의 개념생태 내에 자리잡고 있는 관련된 장소에서 출발해야 한다. 둘째, 학생들의 비일관적인 설명은 개념변화의 단서로 이용될 수 있다. 셋째, 과거 경험은 학습자를 깊이 이해하기 위해 개념생태 연구가 지속적으로 탐구해야할 영역이다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 봄 학술발표회 논문집
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• pp.63-70
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• 2002

In tunnel construction, the information on the rock quality and the location of fault or fracture are crucial for economical design of support pattern and for safe construction of the tunnel. The grade of rock is commonly estimated through the observation with the naked eye of recovered cores in drilling or from physical parameters obtained by their laboratory test. Since drilling cost is quite expensive and terrains of planned sites for tunnel construction are rough in many cases, however, only limited information could be provided by core drilling Electrical resistivity and EM surveys may be a clue to get over this difficulty. Thus we have investigated electrical resistivity and EM field data providing regional Information of the rock Quality and delineating fault and fracture over a rough terrain. In this paper, we present some case histories using electrical resistivity and EM survey for the site investigation of tunnel construction. Through electrical resistivity and EM survey, the range and depth of coal seam was clearly estimated, cavities were detected in limestone area, and weak zones such as joint, fault and fracture have been delineated.

• 대한가정학회지
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• 제41권3호
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• pp.131-146
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• 2003

The purpose of this study is to explore what makes the elderly women resilient in old age and how they reconstruct their later lives. This study used life histories extracted from tape-recorded interviews of 13 elderly women and analyzed key issues focused on how to adapt in old age. Main results are following: First, emerging themes to maintain life satisfaction in old age are related to both informants' inner and outer life worlds; subjective reinterpretation of life, feeling rich, family, social activities, overcoming social stigma. With supporting and supplementing one another, these five dimensions are important contributors to better later life. Second, where my informants search for meaning of life in old age is the critical clue of understanding the later life styles. Some of them are still searching meaning of life in roles as a ‘mother’, while others are finding their sense of worth outside the family or in themselves. These results show that the elderly are interacting with themselves and their surroundings in adapting to old age and different tie styles according to different sources of life satisfaction manifest the changes among the elderly and Korean society.

• 한국의사학회지
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• 제18권1호
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• pp.103-126
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• 2005

1) Objective This research is a process of examining the Traditional Acupunctural Methods left in our documents. The objectives of this paper are explaining the process of researching documents and reporting several points revealed in this process. 2) Process This study was done through the following steps: (1) We located the Acupunctural Methods in the original text database on the web. (2) We sorted them according to criterion. (3) We set up some standard clauses in order to organize the selected information. (4) We re-organized the information following the standards within the categories. (5) As for clauses that were not fully explained in the documents, we tried to restore them through other documents. 3) Results (1) 11 standard clauses were set up in order to organize the Traditional Acupunctural Methods. (2) Traditional Acupunctural Methods were extracted from 22 documents, (3) 24 Traditional Acupunctural Methods were extracted and organized by standards. (4) We learned of similar methods with resembling ways of drawing blood and methods with deep interest in the depth of needle insertion. Also, we were able to gain a clue to the exchange of Acupunctural Methods among the three Asian countries and the possibility of research using the Korean Medicine Database.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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• pp.52-54
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• 1996

A number of algorithm using the VSS(Variable Structure System) for uncertain dynamic system are developed. But, in these algorithms, the assumption that the uncertainties are bounded and their bounds are available to the designer is involved. And bounds on the uncertainties are an important clue to guarantee the stability of the closed loop system. However, sometimes bounds on the uncertainties may not be easily obtained because of the complexity of the structure of the uncertainties. Therefore, a methodology by which the boundary values on the uncertainties can be easily obtained is required. The VSS proposed in this proposal employ the new adaptive VSS scheme for uncertain dynamic system being estimated on line. The resulting control law is simple and easy to apply to on line computer control. It can also suppress chattering and maintain good tracking precision even if unmodeled dynamics are considered. And, a new method using nonlinear switching surface is introduced so that the speed response is improved and the good transient response can be obtained. Simulation results are presented and show the advantage of the proposed adaptive VSS with nonlinear switching surfaces.

• Agribusiness and Information Management
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• 제6권1호
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• pp.12-19
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• 2014

The purpose of this study is to compare and analyze the product image produced by the cinemagraph image and the product image produced by the general image in the electronic trade. The cinemagraph refers to the image with a special characteristic that provides the motion clue by playing the part of the picture endlessly in the form of a video. For this study, we explored how the perceived monetary value, brand attitude, and perceived taste would influence on the purchase intention, and it was analyzed that all of the three factors significantly influenced on the purchase intention. However, it was investigated that the purchase intention of the group watching the image by the cinemagraph was significantly influenced by the perceived monetary value and the perceived taste, and the purchase intention of the other group watching the general image was significantly influenced by the brand attitude and the perceived taste; therefore, it was verified that there was a difference between the group watching the cinemagraph and the group watching the general image. In this result, it could be interpreted that when the people watching the cinemagraph purchase a product in the shopping mall, the price becomes the important requirement, and when the people watching the general image purchase a product in the shopping mall, the brand becomes the important requirement; therefore, these results could provide great implications to the food marketers.

• 한국실내디자인학회논문집
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• 제15권3호
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• pp.3-13
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• 2006

It is obviously true that the aspects of interior designs in current use have been combined with changing trends and developed and handed down throughout centuries. An examination of respective characteristics of spaces where Korean presidents have lived during their terms of office could get a useful clue by which both traces of Korean modernism and senses of modeling can be perceived. However, there are not enough literatures that can be verified. Therefore, it would be especially meaningful to find out and analyze documents unearthed. The purpose of this study is to consider the expressiveness of interior designs of presidential residence and office which have been combined with changing trends and developed, while classifying respective cases during presidential tenure by periods of Joseon Government general, U. S military administration, the first Republic, the second Republic, the third and the fourth Republic, the fifth Republic, and the sixth Republic, examining relevant literatures, photos, drawings and making on-the-spot survey. The study is also intended to get a better understanding of the aspects and the features of interior designs shown in presidential residences and offices that are not so much made known due to uneasy access to archives and to document the resources buried in oblivion and to consider the historical meanings.