• 인간식물환경학회지
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• 제24권5호
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• pp.499-507
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• 2021

Background and objective: This study was carried out to develop an effective technique for raising seedlings of Veronica pyrethrina Nakai, a native plant species in the Korean Peninsula, in plug trays. Methods: To investigate the optimum plug cell size and sowing media, we sowed seed in to plug trays with 34, 21, and 10 mL cells and filled with a commercial horticultural substrate and mixtures of peatmoss and perlite in 1:1, 3:1, and 4:1 ratios. Fertilization levels were set at 0, 500, 1000 and 2000 mg·L^-1. Results: Plug cell size did not significantly influence the seedling growth of V. pyrethrina. By substrate type, the growth rate was highest in the horticultural substrate, followed by 4:1, 3:1, and 1:1. Growth by fertilization level was higher in all fertilized treatment groups than in the control group, and there was no difference among 500, 1000, and 2000 mg·L^-1. Conclusion: The results of this study proved that it is most suitable for raising seedlings of V. pyrethrina to sow the seeds in a 10 mL cell plug tray filled with horticultural substrates, and apply fertilizers with less than 500 mg·L^-1 concentration.

• Journal of Ecology and Environment
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• 제46권3호
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• pp.243-249
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• 2022

Background: Mixed breeding herb Viola collina Besser, which produces both chasmogamous and cleistogamous flower, has limited habitats under closed canopy and short and early flowering timing, making it relatively more vulnerable to climate change. To better understand the effect of light and nutrient on the flower formation and vegetative growth of V. collina, a mesocosm experiment was conducted. Two-by-two factorial treatments of two light conditions (100% and 60% of natural light) and two fertilizer treatment conditions (fertilized and not fertilized) were applied in the mesocosm experiment. Results: The number of flowers, including chamogamous and cleistogamous flowers, was highest (5.65/pot) under 60% light and fertilized condition and lowest (1.41/pot) under 100% light and not-fertilized condition. However, above ground vegetative growth was highest (2.89 g/pot) under 100% light and fertilized condition and lowest (2.38 g/pot) under 60% light and not-fertilized condition. Above ground biomass to belowground biomass ratio was highest (1.50) under 60% light and fertilized condition and lowest (1.26) under 100% light and fertilized condition. Conclusions: This study showed that high light and nutrient are responsible for the vegetative growth, though the effect of fertilizer was reduced due to allocation and retainment of nutrients. In addition, the low light is necessary to make flowers, especially chasmogamous flowers.

• 유통과학연구
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• 제21권8호
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• pp.23-34
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• 2023

Purpose: To examine the economic effects of logistics under the influence of policies. Research design, data and methodology: This study is the first to use the panel data of 31 provinces and municipalities in China from 2012 to 2021, and use the OLS and DID models to evaluate whether the New Western Land-Sea Corridor (NWLSC) has promoted the economic development of the regions along the corridor. Results: The NWLSC has stimulated local economic growth by promoting the development of transportation, postal, and telecommunications industries along the corridor. Further, considering the locational differences of the regions along the NWLSC, we examined the differences in economic effects between regions along the Yangtze River and those not along the Yangtze River under the background of NWLSC implementation. We found that waterway and airway transport located along the NWLSC and in the Yangtze River Economic Belt (YREB) region can significantly promote economic growth. However, for regions located along the NWLSC but not in the YREB region, the impact of roadway, railway, and airway transport in these regions on economic growth is more significant. Conclusions: This study has important reference value on how to use logistics to promote the economic and cross-border commerce development of landlocked countries or regions.

• 통상정보연구
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• 제8권4호
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• pp.301-322
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• 2006

The change of the global environment, especially the development of the communication and transportation and the decrease of the trade barrier promotes the progress of globalization. Under this background, the globalization progress of Chinese electronic firms is also pushed forward, compared with the early firms, which is being quickly shortened. This study has some purposes. First, this tries to investigate the growth process of the Chinese electronics firms, by which reveals the progress of the global competition ability and the background of promoting their rapid globalization. Second, this study estimates and analyzes the implemented process of Haier's globalization strategy, which is the Chinese most representative global Firm. Finally, this article elaborates the globalization of Chinese firms and the apocalypse of the Korean firms and also shows the corresponding projects for them.

• 한국실내디자인학회논문집
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• 제22호
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• pp.92-101
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• 2000

This study aims to inquire into the expressive characters of Shiro Kuramata's works regarding his design languages. His design languages, based on sentimentality and aesthetics characteristic of the orient and his unique memories and experiences, can be defined as nongravitation, fioatation and transparency. And the definition can be completed by his unique extinguishing technique, eliminating the structure with materials without feature, such as glass and acrylic and expanded metal, steel mash and 'Star piece Terrazzo' a material which he has invented. This study examines Shiro Kuramata's design works from the late 1960's to 1991, the year of his death, the background of his growth and the art and people who have influenced him. It also looks into the indigenous cultural background and his unique memories and experiences. The study also considers his furniture works and interior design to read his languages properties of the materials and expressive techniques. The study presents data on Shiro Kuramata and puts forwards the significance of his works and tries to lead the way of the interior design by application techniques of materials.

• 토지주택연구
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• 제8권2호
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• pp.55-58
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• 2017

This short paper is about the background, progress, achievement as well as the direction of Urban Regeneration (UR) Policy since 2013 in Korea. The UR in Korea has been recognized and initiated late compared to UK, Japan as well as many other countries that have achieved economic growth earlier than Korea. In 2013, the Special Law on UR established and the UR project has begun in earnest. However, there are still a number of pending issues required to be resolved for the regeneration of declining cities. After reviewing the background of UR in Korea, we would go through the progress and achievement of UR and then we look at the follow-up measures required to be resolved in short period as well as longer term for successful UR.

• 한국어류학회지
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• 제26권3호
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• pp.185-193
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• 2014

강도다리, Platichthys stellatus의 먹이섭식, 성장 및 무안측 흑화에 있어 수온, 수조색상 및 조도의 영향을 파악하기 위해, 본 연구에서는 전장(TL) $17.3{\pm}0.5cm$ 및 체중(BW) $82.5{\pm}0.2g$의 양성어 중 정상 개체만을 선별하여, 6월에서 12월까지 180일 동안 환경 조건별 실험을 실시하였다. 실험은 국방색과 흰색수조($H100cm{\times}L100cm{\times}W100cm$; bottom area $1m^2$)를 이용하여 평균 조도 230 lux와 1,000 lux에서 2반복으로 실시하였다. 이 때 실험 밀도는 100마리/수조(430% of initial covering area [PCA])였다. 본 실험에서는 실험 기간동안, 수온 및 염분과 일간먹이섭식량(DFI)의 상관관계를 조사하였고, DFI, 먹이효율(FE), 성장, 생존율, 무안측 흑화률 및 흑화개체 비율을 실험구별로 비교하였다. DFI는 염분과의 상관관계는 보이지 않았지만, 겨울과 여름철 0.5 g/fish/day까지 유의하게 감소하고, 반대로 수온 $10{\sim}20^{\circ}C$인 가을에 1.5 g/fish/day 이상 증가하는 경향을 보였다. 이러한 결과는 강도다리 양식은 수온 $10{\sim}20^{\circ}C$에서 이루어져야 함을 내포하고 있다. 또한 DFI, FE 및 생존율은 배경색상과 조도의 영향을 받지 않았다. 또한 가자미류의 무안측 흑화 발현 인자로 알려진 200% PCA 이상의 높은 밀도, 어두운 배경색상과 과도하게 밝은 조도가 강도다리에게 아무런 영향을 미치지 않았다.

• 한국사회정책
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• 제25권3호
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• pp.175-208
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• 2018

본 글의 목적은 여전히 논쟁 중인 한국의 소득주도 성장정책을 평가하는 것이다. 이를 위해 먼저 소득주도 성장론의 내용은 무엇이며, 왜 이 이론이 등장했는지, 그리고 한국경제에 갖는 의의가 무엇인가를 논의했다. 다음으로 한국경제에서 성장 전략으로서 소득주도 성장의 역할은 무엇인지를 논의하고 향후 정책 방향을 제시했다. 서구에서 소득주도성장 이론은 경제에서 수요의 역할을 중시하는 케인스 학파의 전통에서 나온 것으로서 기본 개념은 거의 80년 전에, 그리고 현재의 이론 모델은 30년 전에 등장했다. 한국 경제학계 일부에서 이에 주목하기 시작한 것은 2010년 ILO 연구자들이 이를 논의하면서부터다. 최근 들어 소득주도성장론이 주목받게 된 것은, 20세기 후반 이후 전 세계적으로 노동소득 분배율 하락과 양극화 경향이 심해졌고, 그래서 불평등 심화는 성장을 저해할 수 있다는 우려가 공감대를 형성했기 때문이다. 국민소득 중 노동의 몫을 높임으로써 경제성장을 이끌 수 있다는 소득주도성장 전략의 실효성에 대해서는 이론적으로나 실증적으로나 논란이 존재한다. 그러나 소득주도성장 전략이 등장하게 된 배경과 취지에는 공감할 수 있다. 소득주도성장론은 단기적인 성장 전략이 아니며, 또한 성장 전략의 중심이 되기도 어렵다. 그러나 오늘날의 사회경제구조에서 소득주도성장론의 처방은 경제 시스템을 건강하게 함으로써 지속 가능한 성장을 가능하게 한다는 면에서 의의를 지닌다. 아울러 서구와 달리 한국에서는 정부의 복지정책이 소득주도성장론 처방의 일부로서 의미있는 역할을 할 수 있다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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• pp.60-60
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• 2015

Nanosheets of graphene and related 2D materials have attracted much attention due to excellent physical, chemical and mechanical properties. Single-layer graphene (SLG) was first synthesized by Blakely et al in 1974 [1]. Following his achievements, we initiated the growth and characterization of graphene and h-BN on metal substrates using surface segregation and precipitation in 1980s [2,3]. There are three important steps for nanosheet growth; surface segregation of dopants, surface reaction for monolayer phase, and subsequent 3-D growth (surface precipitation). Surface phase transition was clearly demonstrated on C-doped Ni(111) by in situ XPS at elevated temperatures [4]. The growth mode was clarified by inelastic background analysis [5]. The surface segregation approach has been applied to C-doped Pt(111) and Pd(111), and controllable growth of SLG has been demonstrated successfully [6]. Recently we proposed a promising method for producing SLG fully covering an entire substrate using Ni films deposited on graphite substrates [7]. A universal method for layer counting has been proposed [8]. In this paper, we will focus on the effect of competitive surface-site occupation between carbon and other surface-active impurities on the graphene growth. It is known that S is a typical impurity of metals and the most surface-active element. The surface sites shall be occupied by S through surface segregation. In the case of Ni(110), it is confirmed by AES and STM that the available surface sites is nearly occupied by S with a centered $2{\times}2$ arrangement. When Ni(110) is doped with C, surface segregation of C may be interfered by surface active elements like S. In this case, nanoscopic characterization has discovered a preferred directional growth of SLG, exhibiting a square-like shape (Fig. 1). Also the detailed characterization methodologies for graphene and h-BN nanosheets, including AFM, STM, KPFM, AES, HIM and XPS shall be discussed.

• 한국약용작물학회지
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• 제28권3호
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• pp.200-208
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• 2020

Background: Salvia miltiorrhiza Bunge has been used in traditional medicine. The type of light source has an effect on the growth properties and composition of functional compounds in plants. In this study, we analyzed the effects of different artificial light sources on the growth characteristics as well as antioxidant and antimicrobial activities of S. miltiorrhiza. Methods and Results: Seedlings of S. miltiorrhiza were grown under various artificial light sources, including fluorescent light (FL), light emitting diode (LED), and microwave electrodeless light (MEL), for 8 weeks. Growth characteristics were the best in plants treated with MEL. DPPH scavenging activity of the shoot was more pronounced with the FL treatments, while the roots were more active in plants grown under single wavelength lights (i.e., blue and red LEDs). Among the different light source treatments, the blue LED resulted in a higher total phenolic content in the plants. Furthermore, growing plants growth under the red LED enhanced their total flavonoid content. Notably, the antimicrobial properties of plants varied significantly between light source treatments in this study. Except for E. coli, all the tested microorganisms were susceptible to the plant extracts. Conclusions: The type of light source may be an important parameter for the enhancement of plant growth and functional compounds in S. miltiorrhiza.