• Title/Summary/Keyword: coverage rate

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Analysis of the Change of the Flora and Vegetation Association of Ui Island Sand Dune (우이도 해안사구의 식물상과 식생군집 변화분석)

  • Beon, Mu-Sup;Oh, Hyun-Kyung
    • Korean Journal of Environment and Ecology
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    • v.20 no.1
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    • pp.41-51
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    • 2006
  • We investigated the flora of Ui Island sand dunes, consisting of 142 taxa; 52 families, 108 genera, 124 species, 15 varieties, and 3 forms. The total plants of floral region that were identified were 16 taxa; Elymus mollis, Salsola collina, and Farfugium japonicum in Class III; Ischaemum anthephephoroides, Carex kobomugi, Glehnia littoralis, Messerschmidia sibirica, Machilus thunbergii, Elaeagnus macrophylla, and Aster spathulifolius in Class I . Naturalized plants were 11 taxa; 7 families, 10 genera and the naturalization degree was 7.8%. On the Donmok seaside area, the coverage rate was about $20%{\sim}25%$ in 2002, but this time it had increased to more than three times or $65%{\sim}75%$. Also, on the Sungchon seaside area, the coverage rate was about $15%{\sim}20%$ in 2002, but this time it was $70%{\sim}75%$ as a result of the rapid increase of Zoysia macrostachya and Carex kobomugi. Pungseong sand dune area showed a monotonous state in variety and number, because of the strong wind and repetition of sand income and outcome.

The Effect of Changes in Real Estate Prices on the Soundness of Korean Banks (부동산가격변동이 은행의 건전성에 미치는 영향)

  • Jung, Heonyong
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.1
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    • pp.435-440
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    • 2022
  • This study analyzed the impact of changes in real estate prices on the soundness of Korean banks using multiple regression models. As a result of the analysis, changes in real estate prices significantly increase the banks' non-performing loans through the increase in loans. Among macroeconomic variables, short-term interest rates were found to have a significant effect on all soundness indicators such as BIS capital adequacy ratio, non-performing loans ratio, and liquidity coverage ratio. Among the bank characteristics indicators, the loan growth rate had a significant negative effect on BIS capital adequacy ratio, and the real estate mortgage rate had a significant positive effect. In additional, it was found that non-performing loans ratio and liquidity coverage ratio had a negative effect on BIS capital adequacy ratio.

Suggestion of Spring Seedling Amounts and Drone Spreader Type for Italian Ryegrass using Drones

  • Hyeonsoo Jang;Seung-Hwa Yu;Yun-Ho Lee;Hui-Woo Lee;Pyeong Shin;Dae-Uk Kim;Jin-Hui Ryu;Jong-Tak Youn;Jung-Won Kim;Bo-Gyeong Kim
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2022.10a
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    • pp.129-129
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    • 2022
  • The production area of Italian ryegrass feed is gradually increasing and labor-saving technologies are being developed. If sowing and fertilization are carried out agricultural drones, working hours and labor are reduced. The purpose of this study is to suggest an appropriate seedling amount for feed production by drone spreading of Italian ryegrass in spring. In addition, we would like to review the productivity of the drone seeding machine that is being developed by Rural Development Administration(RDA) of Korea. Italian ryegrass was sown by a drone in February at the NICS located in Gyehwa-hwa, Jeollabuk-do, South Korea. In Experiment 1, 50kg/ha, 60, 70, and 80 seeding rates were sown with a horizontal spreader drone. In Experiment 2, uniform spreaders type drone and horizontal spreader type were sown with the same seeding amount and compared. The drone was sown using the AF-52 aircraft. The higher the seeding amount, the higher the emergence rate. As the seeding amount increased, the plant length increased, but the number of tillers per individual decreased. The dry matter weight of the feed was the highest at 1,326kg/10a at the seeding rate of 70kg/ha, and decreased by 20.5% at the seeding rate of 80kg/ha. The coverage ratio was the highest at 96 at the seeding rate of 70kg/ha, which was the most advantageous for spring sowing. In the comparative experiment according to the spreader type, the uniform spreader had a high emergence rate per unit area. When the uniform spreader was used, the dry matter weight of the feed was 17% higher than that of the horizontal one, and the coverage was about 5% higher.

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Development of Production Technology for Mixed Lines Sod in Zoysiagrass (한국잔디류의 혼식뗏장 생산기술 개발)

  • 이재필;김종빈;김두환
    • Asian Journal of Turfgrass Science
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    • v.13 no.1
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    • pp.29-36
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    • 1999
  • This study was conducted to make the utmost use of the good traits and to improve the poor traits of zoysiagrass through the production technology for mixed lines sod in addition to breeding. Mixed lines sod was produced by mixing broad or middle leaf line with narrow leaf line by volume, a ratio of 1 to 2. The mixed lines sod of zoysiagrass was superior to the single ling sod, which is used commonly, for the establishment rate, coverage rate, shoot density, texture, leaf color, dormancy period cnd color, and visual quality.

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A Study on the Stabilization of Bit Rate and LTE for the TV DMNG Broadcasting

  • Jeong, Gyoung Youl
    • International Journal of Advanced Culture Technology
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    • v.6 no.4
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    • pp.266-274
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    • 2018
  • Securing field screens through LTE broadcasting is a very valuable technology in news production because of its locality and concurrency. TV has the advantage of being able to deliver news faster than newspapers and make live coverage on the scene of events and events. To maximize this, not only middle-end broadcasters but also existing broadcasting stations are taking an active role in broadcasting using LTE. However LTE broadcasting has yet to secure any conflicting values of broadcasting stability and securing high-definition. The key to solving this difficulty is the transmission rate of Bit Rate. This paper compares the Bit Rate transmission method, which is variable and fixed, to provide more on-site screens through LTE, and presents the Bit Rate adjustment method as a method of screen stabilization through experiment. Consequently, the most stable broadcast screen can be obtained when transmitting and connecting it to broadcasting in a variable 5M method.

Managing Mixtures of Tall Fescue (Festuca arundinacea Schreb) and Zoysiagrass (Zoysia japonica Steud.) for Athletic Turf (톨 페스큐와 한국들잔디로 혼합 조성된 운동장 잔디관리)

  • Li, Deying;Han, Lei
    • Asian Journal of Turfgrass Science
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    • v.22 no.2
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    • pp.197-216
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    • 2008
  • Managing a mixture of zoysiagrass with tall fescue has been proposed in transitional zone as a practical practice to combine the advantages of the two species and compensate the limitations. To manage the mixture is a challenge because two species are involved. The objective of this study was to determine if zoysiagrass/tall fescue mixture can be maintained with proper mowing and fertilization under simulated sport traffic at an acceptable quality level. Zoysiagrass was seeded in June and tall fescue was overseeded in August 1996. In November 1996, zoysiagrass coverage was 62.36, 29.88, and 30.02% for 0, 50, and $100\;Kg\;ha^{-l}\;N$ rates, respectively. At the same time, zoysiagrass coverage was 23.53, 41.95, and 57.40% for the mowing heights of 6.5, 5.0, and 3.5 cm, respectively. Zoysiagrass and tall fescue coverage in July 1997 was showing the same trend as in the late season of 1996 although the differences were not as big. There were significant interactions between N fertilization rates and mowing heights. In November 1998, the zoysiagrass coverage was different among the two tall fescue variety mixtures, 21.68, and 32.25% in 'Arid' and 'Grasslands Garland', respectively. Zoysiagrass coverage was favored in lower mowing height, lower N rates, and lower traffic. Interaction effects on zoysiagrass were found between tall fescue variety and nitrogen rate, tall fescue variety and mowing height, and traffic and nitrogen rate. Zoysiagrass shoot density was 7.42, 25.47, and 58.95% for mowing heights of 6.5, 5, and 3.5 cm, respectively; and it was 47.27, 20.27, and 26.26% for N rates of 0, 50, and $100\;Kg\;ha^{-l}\;$, respectively in 1998. The effects on zoysiagrass shoot density from the interaction of N rate and tall fescue variety was significant in 1998. Shoot density responded to the N rate, mowing height, and traffic differently from the ground coverage, indicating that shoot and leaf growth have different adaptation strategies.

A Study on Sizing System for the Knit Trainning Wears-females from 15 to 24 years old- (니트츄리닝복의 치수 체계에 관한 연구-만 15~24세 여자를 중심으로-)

  • 문명옥;천태일
    • Journal of the Korean Society of Clothing and Textiles
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    • v.24 no.3
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    • pp.335-344
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    • 2000
  • The purpose of this study was to set up sizing system for knit trainning wears. Sample size was 198 females and their age range was from 15 to 24 years old. The body types for sizing system for knit trainning wears were divided by height and drop values. The results were as follows. 1. The height could be divided into three groups and they covered 97.5%. The Short(152cm) covered 27.8%, the Regular(160cm) 51.0% and the Tall(168cm) 18.7%. 2. The Medium hip(drop value 6) and the Large hip(drop value 12)had the high coverage rate of 45.5% and 46%, and the Small hip(drop value 0) had the low coverage rate of 8.6%. 3. For sizing system for knit trainning wears, the intervals of bust girth and hip girth were 5cm and 4cm. In the same size of bust girth, the intervals of hip high girth and waist girth were 1cm, the intervals of back waist length and sleeve length were 2cm and the interval of slacks length was 4∼5cm according to three height groups.

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Dielectric and Passivation-Related Properties of Pecvd PSG (PECVD PSG의 유전 및 보호막특성에 관한 연구)

  • 유현규;강영일
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.22 no.2
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    • pp.90-96
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    • 1985
  • The properties of plasma-enhanced CVD phosphorous silicate glass (PECVD PSG) for passivation layer are studied . Phosphorous contentration was analyzed with X-ray fluores-cence. As a result, PECVD PSG has a limiting phosphors concentration of about 8 mole%. Curves relating to etcll rate, infrared absorption ratio, and sheet resistivity were adapted to monitor phosphorous concentration indirectly Dielectric properties, step coverage, crack resistance, and gettering effect are discussed in both of atmospheric pressure CVD (APCVO) and PECVD oxide. PECVD SiO2 film have density of about 2.4 g/㎤ at deposition rate of 450$\AA$/min, refractive index of about 1.53, and breakdown at fields of II-13 MV/cm. Crack resistance of PECVD oxide is greater than APCVD oxide. PECVD PSG films contained with 2 mole % phosphorous show good step coverage and gettering ability. The obtained results show more advantages in PECVD PSG than in APCVD PSG for device passivation.

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The Effect of Temperature Reduction as Influenced by Rooftop Greening (옥상녹화조성에 따른 온도저감효과에 관한 연구 -서울대학교 실험구를 중심으로-)

  • Lee, Dong-Kun;Yoon, So-Won;Oh, Seung-Hwan;Jang, Seong-Wan
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.8 no.6
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    • pp.34-44
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    • 2005
  • The objective of this study is to analyze the thermal properties of various green roof type. The experimental districts, have different soil thickness, soil type, the existence of module and the different kinds of vegetation, had installed. A measurement was conducted in Seoul University to investigate the thermal impacts of rooftop greening. The measurement point of temperature were 30, located in soil surface, middle of the soil layer, under the module, hard surface and soffit surface of each experimental district. The experimental investigation lasted from 6th August to 29th August, a total of 24 days. The results showed that green roof can contribute thermal benefits by soil and vegetation and reduce building energy consumption by a role of insulation. It's also better to make soil thickness over 20cm and various vegetation that should be more effective. The district installed only soil also could be effective for reducing the temperature of roof surface. Therefore, the increase of soil thickness and various vegetation could reduce more temperature of roof surface and building energy consumption. Also, it's helpful to reduce temperature that plant coverage rate be raised.

Fast Link Switching Scheme for LED-ID System

  • Trung, Bui Minh;Uddin, Muhammad Shahin;Chowdhury, Mostafa Zaman;Nguyen, Tuan;Jang, Yeong-Min
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.12B
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    • pp.1586-1594
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    • 2011
  • LED-ID (light emitting diode - identification) technology is the new paradigm in the identification technology environment. LED-ID system typically needs line of sight (LOS) that supports narrow FOV transceivers links to achieve high data rate. On the other hand, narrow FOV reduces the coverage area. Therefore, the number of tags is increased significantly to cover the whole area. In this case number of link switching is increased when the reader moves within whole coverage area. Link switching delay is the important factor for the moving reader to maintain the communication with high data rate and better QoS. In this paper we propose in literature a new link switching scheme and measure the link switching delay time for LED-ID system. The simulation results show that the proposed link switching scheme is a possible candidate for multi-tag LED-ID system.