• 식물조직배양학회지
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• 제28권4호
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• pp.189-195
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• 2001

화경절 액아 유래 신초의 잎을 이용한 팔레높시스 대량번식에서 배양재료로 이용되는 신초의 발생수를 증가시키기 위해 화경배양을 위한 배지, 배양온도 화경 전처리 등 기내 배양조건과 계통 간 화경의 발육형태에 대해 조사하였다. 화경절 액아의 신초발생률은 MS배지에서 90.9%, Hyponex 배지에서 54.4%이었다. 5 mg/L의 BA가 첨가된 MS배지에서 신초가 많이 형성되었으며 발육상태도 양호하였다. 화경 액아의 위치별 발육형태는 기저부 쪽일수록 신초발생이, 상부 쪽일수록 2차화경이 많이 발생되었으며 25~28$^{\circ}C$의 배양온도는 액아로부터 신초를 얻는 데 적절하였으며, 황화처리는 오염률을 낮추는 데 효과가 있었으나 페놀물질 유출량의 감소효과는 없었다. 수집한 30계통 중 27계통의 화경에서 신초를 얻었으며 화경편 당 평균 신초수는 3.17개이었으나 Phal. 3020, 3039 등은 신초가 많이 발생되어 다른 계통과 차이가 있었다. 교잡 F$_1$계통의 화경발육 양상은 모본(수집계통)과 비슷하였다.

• 대한의생명과학회지
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• 제10권3호
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• pp.317-324
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• 2004

In order to examine the clinical effects on male pattern hair loss, the oriental medicine extract composed of Polygoni multiflori Radix, Angelica gigantis Radix and Lycii Fructus was tested to balding people. 40 males and 10 females were participated in this experiment, and they had spread the extract on their scalp themselves one time a day for 18 months. After 18 months, all participants submitted the reports that had questionnaires to determine the effect of topical oriental medicine extract on hair growth and/or hair loss preventing in balding people. In the results, ir was found that hair density on the entire scalp was gradually increased during the spreading period of the extract in most of balding people. The hair loss was observed about 1 week or 2 months after extract treatment and hair growth was observed about 6 months after extract treatment. In the reports, 74％ of participants answered that the extract was effective on hair growth and hair loss preventing, and improvement of scalp condition. From these results, it is suggested that the extract composed of Polygoni multiflori Radix, Angelica gigantis Radix and Lycii Fructus may be an effective medical care to hair growth and hair loss preventing in human.

• 품질경영학회지
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• 제41권1호
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• pp.1-14
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• 2013

Purpose: The purpose of this research was to investigate the spread pattern of Korean legal certification systems and their impact on industry performance. Methods: It first analyzes the life cycle of legal certification systems and classifies them into four categories based on the spread patterns in a chronological view. A survey study is then conducted to find out the impact of legal certification systems on financial performance. Both the legal mandatory certification systems and the legal voluntary certification systems are included in the survey. Results: Four spread patterns of legal certification systems are sustainable growth, stagnation after growth, decrease after growth, and repetition of growth and declination. 56% of 293 certified corporations responded positively about the financial impact of their certification systems. Conclusion: The policy makers can utilize the results of this study in designing additional certification systems as well as promoting the current legal certification systems.

• The Korean Journal of Ecology
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• 제6권4호
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• pp.1-9
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• 1983

The observation of branching pattern on Magnolia denudata Desr. was performed from July 1982 to September 1983 and then computer simulation was carried out. Tree crown pattern depends on not genetic factors but also environmental factors and the determination of branchin pattern which characterized it appears to properly explain the relationships such as branching pattern and allocation of materials through the analysis of influence branches under several assumptions. Now that computer simulated simulated pattern was considered as the accumulation of two factors which controled the growth, it was represented as the stimulated tree which differs in branching rate that described allocation of material necessary for the growth of each branch. There was a tendency of allocation ratio of nutrients, i.e. subbranch to main branch to decrease by the passage of year. Under assumption that branch was branched when accumulated material reached 1, it was possible to represent the allocation of nutrients are residual $nutrient{\times}\frac{1}{1+F};in main; branch, ; residual; nutrient{\times}\frac{F}{1+F}$ in subbranch, A(iA, iC)+$F^(iA-1)$ in current twig. Like this, the basic minute difference of the allocation of nutrients according to the branch resulted in complicated patterns in the tree crown.

• 한국재료학회지
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• 제15권1호
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• pp.54-60
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• 2005

Recently a lots of problems have observed in high densified and high integrated electronic components. One of them is ion migration phenomena, which induce the electrical short of electrical circuit. ion migration phenomena has been observed in the field of exposing the specific environment and using for a long tin e. This study was evaluated the generation time of ion migration and was investigated properly test method through water drop test and high temperature high humidity test. Also we observed direct causes and confirmed generation mechanism of dendritic growth as we reproduced the ion migration phenomena. We utilized PCB(printed circuit board) having a comb pattern as follows 0.5, 1.0, 2.0 mm pattern distance. Cu, SnPb and Au were electroplated on the comb pattern. 6.5 V and 15 V were applied in the comb pattern and then we measured the electrical short time causing by ion migration. In these results, we examined a difference of ion migration time depending on pattern materials, applied voltage and pattern spacing of PCB conductor.

• 기술혁신학회지
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• 제5권1호
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• pp.16-25
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• 2002

그 동안 R&D와 관련된 많은 연구는 다양한 성장모형을 이용해 경제성장과 연구개발 투자사이의 관계를 보이는데 중점을 두어왔으나, 디지털 경제에서의 지식 혁신에 의한 R&D활동의 성장패턴을 보이는 연구는 이루어지지 않고 있다. 따라서 본 연구에서는 W기업의 생산과정에서 R&D활동에 따른 비중의 변화가 생산성을 증가시키는 성장의 패턴을 다양하게 할 수 있음을 보이고자 한다.

• Bulletin of the Korean Chemical Society
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• 제34권1호
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• pp.164-166
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• 2013

Using a simple random walk model, this study simulated the growth of a self-assembled monolayer (SAM) pattern generated by dip-pen nanolithography (DPN). In this model, the SAM pattern grew mainly via the serial pushing of molecules deposited from the tip. This study examined various SAM patterns, such as lines, crosses and letters, by changing the tip scan speed.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2002년도 춘계학술대회
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• pp.19-33
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• 2002

그 동안 R&D와 관련된 많은 연구는 다양한 성장모형을 이용해 경제성장과 연구개발 투자사이의 관계를 보이는데 중점을 두어왔으나, 디지털 경제에서의 지식 혁신에 의한 R&D활동의 성장패턴을 보이는 연구는 이루어지지 않고 있다. 따라서 본 연구에서는 IT기업의 생산과정에서 R&D활동에 따른 비중의 변화가 생산성을 증가시키는 성장의 패턴을 다양하게 할 수 있음을 보이고자 한다.

• Journal of the Korean Wood Science and Technology
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• 제44권6호
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• pp.903-912
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• 2016

Morphological and anatomical evaluation of grafted P. merkusii have been undertaken to obtain the information about compatible and incompatible symptoms of 18 years old grafts based on morphological observation and microscopic analysis. Samples of compatible and incompatible grafts were obtained from previous research conducted by the Silviculture Departement Team in 1994. Result showed that compatible grafts have normal stem form and secondary growth (diameter growth), but some abnormality symptoms like undulated pattern of annual growth rings, phloem thickening and abnormality resin ducts in inner and middle parts of the union area occurred. Incompatible ones showed abnormality of the stem form, cortex-bark necrosis and swelling in the union area. Microscopic observation showed abnormality of all parts of the union, undulated pattern of annual growth rings, phloem thickening, abnormal resin ducts, low numbers and discontinuity of vascular elements in the union area.

• 대한기계학회논문집
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• 제19권5호
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• pp.1308-1318
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• 1995

The influence of varying rotation speed of both crystal and crucible was numerically investigated for the Czochralski silicon-crystal growth. Based on a simplified model assuming flatness of free surfrae, the Navier-Stokes Boussinesq equations were employed to identify the flow pattern, temperature distribution as well as the shape of the melt/crystal interface. The present results showed that the interface shape was relatively convex with respect to the melt at lower pulling rate and tended to be concave as the pulling rate increased. In particular, the experimentally observed gull-winged shape of the interface was qualitatively in agreement with the predicted shape. The rotation of crystal alone little affected the growth system. When the rotation speed of the crucible was increased, there occurred inversion of the interface shape from convex to concave pattern. At rapid rotation of the crucible, an interesting channel formation was predictied primarily due to the assumption of laminar flow.