• Title/Summary/Keyword: host density

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Design of Data Encoding Algorithm for the Two Dimensional Barcode (2차원 바코드를 위한 데이터 부호화 알고리즘 설계)

  • Jeon, Seong-Goo;Her, Nam-Euk;Kim, Il-Hwan
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.173-175
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    • 2005
  • In this paper, we propose a data encoding algorithm for two-dimensional barcode system. In general, one-dimensional barcode is just a key which can access detailed information to the host computer database. But the two-dimensional barcode is a new technology which can obtain high density information without access to the host computer database. We implemented encoding algorithm for Data Matrix Barcode which is the most widely used among the many kind of two-dimensional barcodes. And we marked to a real object using Digital Signal Processor(DSP) Marking System. The performance of proposed algorithm is verified through the result of marking work.

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A Study on the Design of Format Converter for Pixel-Parallel Image Processing (픽셀-병렬 영상처리에 있어서 포맷 컨버터 설계에 관한 연구)

  • 김현기;김현호;하기종;최영규;류기환;이천희
    • Proceedings of the IEEK Conference
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    • 2001.06b
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    • pp.269-272
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    • 2001
  • In this paper we proposed the format converter design and implementation for real time image processing. This design method is based on realized the large processor-per-pixel array by integrated circuit technology in which this two types of integrated structure is can be classify associative parallel processor and parallel process with DRAM cell. Layout pitch of one-bit-wide logic is identical memory cell pitch to array high density PEs in integrate structure. This format converter design has control path implementation efficiently, and can be utilized the high technology without complicated controller hardware. Sequence of array instruction are generated by host computer before process start, and instructions are saved on unit controller. Host computer is executed the pixel-parallel operation starting at saved instructions after processing start

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Electro-optic Properties of a Guest-Host System Containing a Phenothiazine-based Chromophore: Effect of the Chromophore Density on the Macroscopic Optical Nonlinearity

  • Lee, Sang-Kyu;Cho, Min-Ju;Yoon, Hyuk;Lee, Seung-Hwan;Kim, Jae-Hong;Qing Zhang;Choi, Dong-Hoon
    • Macromolecular Research
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    • v.12 no.5
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    • pp.484-489
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    • 2004
  • We have prepared a phenothiazine-based nonlinear optical (NLO) chromophore that displays a fairly high microscopic nonlinearity through intramolecular charge transfer. The phenothiazine unit plays important roles of contributing its high electron donating ability and connecting the resonance pathway through a conjugative effect in the cyclized ring adjacent to the aromatic ring. Theoretical calculations and an absorption spectroscopic study provided useful information concerning the microscopic nonlinearity of the chromophores. We investigated the electro-optic (EO) properties of the guest-host systems in amorphous polycarbonate containing the synthesized chromophores at different concentrations under different poling temperatures. A real-time pole and probe method provided a much greater amount of information regarding how the EO properties can arise and how they can be optimized.

Roads to Construct and Re-build Plant Microbiota Community

  • Kim, Da-Ran;Kwak, Youn-Sig
    • The Plant Pathology Journal
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    • v.38 no.5
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    • pp.425-431
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    • 2022
  • Plant microbiota has influenced plant growth and physiology significantly. Plant and plant-associated microbes have flexible interactions that respond to changes in environmental conditions. These interactions can be adjusted to suit the requirements of the microbial community or the host physiology. In addition, it can be modified to suit microbiota structure or fixed by the host condition. However, no technology is realized yet to control mechanically manipulated plant microbiota structure. Here, we review step-by-step plant-associated microbial partnership from plant growth-promoting rhizobacteria to the microbiota structural modulation. Glutamic acid enriched the population of Streptomyces, a specific taxon in anthosphere microbiota community. Additionally, the population density of the microbes in the rhizosphere was also a positive response to glutamic acid treatment. Although many types of research are conducted on the structural revealing of plant microbiota, these concepts need to be further understood as to how the plant microbiota clusters are controlled or modulated at the community level. This review suggests that the intrinsic level of glutamic acid in planta is associated with the microbiota composition that the external supply of the biostimulant can modulate.

The fluctuation of soil pathogenic microbes population in radish and chinese cabbage fields (무우 배추 포장내의 병원성 토양미생물 소장)

  • 이왕휴;소인영
    • Korean Journal of Microbiology
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    • v.21 no.1
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    • pp.7-14
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    • 1983
  • In order to study the effects of cropping system and fungicide (Dachigaren) on soil microbes, the seasonal fluctuations of soil microbes in the fields of radish and Chinese cabbage including soil pH, Soil moisture content and soil temperature were investigated on every 15 day interval from the begining of March to late October in 1981. The population of total fungus peaked at the begining of July, while that of total bacteria, at the begining of August. They were affected by soil temperature, however pathogenic microbes seemed to be more related with host plants than the soil temperature, because pathogens showed high density through the whole cultivation period. The pathogenic microbes showed the density of order ; Xanthomonas, Erwinia, Pseudomonas, Agrobacterium and Corynebacterium. Xanthomonas, Erwinia and Pseudomonas, which induced radish and Chinese cabbage diseases were higher than Agrobacterium and Corynebacterium in population densigy. Bacterial soft rot occured at the density of Erwinia $5.9{\sim}6.6{\times}10^5/dry$ soil 1 gram. The density of microbes on continuous fields were higher than that of rotating fields, but there were no significant difference between treated fungicide plot and non treated in the density of microbes, also no difference between Chinese cabbage and radish growing fields.

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Development of a Forecasting Model for Bacterial Wilt in Hot Pepper (고추 풋마름병 예찰 모형 개발)

  • Kim, Ji-Hoon;Kim, Sung-Taek;Yun, Sung-Chul
    • Research in Plant Disease
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    • v.18 no.4
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    • pp.361-369
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    • 2012
  • A population density model for bacterial wilt, which is caused by Ralstonia solanacearum, in hot pepper was developed to estimate the primary infection date after overwintering in the field. We developed the model mechansitically to predict reproduction of the pathogen and pathogensis on seedlings of the host. The model estimates the pathogen's populations both in the soil and in the host. In order to quantify environmental infection factors, various temperatures and initial population densities were determined for wilt symptoms on the seedlings of hot pepper in a chamber. Once, the pathogens living in soil multiply up to 400 cells/g of soil, they can infect successfully in the host. Primary infection in a host was supposed to be started when the population of the pathogen were over $10^9$ cells/g of root tissue. The estimated primary infection dates of bacterial wilt in 2011 in Korea were mostly mid-July or late-July which were 10-15 days earlier than those in 2010. Two kinds of meterological data, synoptic observation and field measurements from paddy field and orchard in Kyunggi, were operated the model for comparing the result dates. About 1-3 days were earlier from field data than from synoptic observation.

The Physio-chemical Variation of the Host Plants and Feed Preference of the Ussur Brown Katydid, Paratlanticus ussuriensis (Orthoptera: Tettigoniidae) (갈색여치(Paratlanticus ussuriensis) 기주식물의 이화학적 특성변화와 먹이선호 구명)

  • Kim, Myung-Hyun;Bang, Hea-Son;Jung, Myung-Pyo;Na, Young-Eun;Han, Min-Su;Kang, Kee-Kyung;Lee, Deog-Bae
    • Korean Journal of Environmental Agriculture
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    • v.28 no.4
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    • pp.356-364
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    • 2009
  • In 2006 and 2007, there was a big outbreak of the Ussur Brown Katydid, Paratlanticus ussurriensis in the central part of Korea attacking some orchard trees. Until 2000, the katydid had not been regarded as an agricultural pest because they were distributed widely in Korea with low population density and their habitats were confined mainly to hillsides of forested areas. The fact that katydid attacked orchard trees with a higher population density seemed to be related to a change in feeding environment. And the shift of their habitats from oak woodlands to commercial orchards was thought to be related to the nutritional contents of their feed. In an attempt to understand these relationships, we conducted an ecological study of the affected areas. When the katydids changed their habitats in early May of 2008 and 2009, they shifted their host plants from oak trees to peach trees. The habitat shift was closely related to the nitrogen (N) content of the host plant leaves. When katydid moved to the hillside adjacent to orchard farm, N content of oak tree leaves decreased dramatically from 5.3% to 2.2%. At that time N content of peach tree leaves were higher than the 2.2% of oak leaves, showing 3.5~5.0%. This range of N content of peach tree leaves has been consistent until late June. And feed preference analysis carried out in the laboratory showed that katydid prefered peach tree leaves to peach fruit to oak tree leaves.

The Prototype Study of Resistivity and Porosity Measurement for the Samples Collected Near Marine Hydrothermal Deposit (해저열수광상 주변 암석 시료의 공극률과 전기비저항 측정 기초실험)

  • Lee, Sang-Kyu;Lee, Seong-Kon
    • Geophysics and Geophysical Exploration
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    • v.13 no.4
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    • pp.378-387
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    • 2010
  • We present the results of laboratory measurement of porosity and electrical resistivity for the samples collected near marine hydrothermal deposit to provide fundamental perspective of physical properties for future electromagnetic survey. The rock cores are sampled from the host rock, pumice, hydrothermal altered zone, and chimney. These samples are featured as easily brittle, rough surface with large pores, having components easily solvable in the water. We suggest systematic approach for measuring weights, volumes of core samples to calculate density and porosity. Measurements reveal that the resistivities of black host rock, gray host rock, pumice and chimney are 102, 39, 11, 0.1 ohm-m, respectively, when the core samples are saturated with saline water of $32,000\;{\mu}S$/cm (0.5 ohm-m) at temperature of $2.5^{\circ}C$ and these correspond to the factors of 5 for sea water, 110 for pumice and 390~1020 for host rocks with respect to the resistivity of chimney. We also confirm that resistivity of rock samples saturated with water decrease with temperature linearly over the temperature range of $20{\sim}80^{\circ}C$.

Annual Occurrent Pattern of Scirtothrips dorsalis (Thysanoptera: Thripidae) on Citrus Trees and Surrounding Host Plants (감귤원과 그 주변 기주식물에서 볼록총채벌레의 연중발생 양상)

  • Song, Jeong Heub;Kim, Chang Seog;Yang, Young Taek;Hong, Soon Yeong;Lee, Shin Chan
    • Korean journal of applied entomology
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    • v.52 no.3
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    • pp.185-191
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    • 2013
  • The damage of citrus by Scirtothrips dorsalis Hood appears to have increased since 2007 in Jeju, although the characteristics of seasonal abundance are not clear. This study was conducted to investigate the relationship between host plants and the seasonal abundance of S. dorsalis, observing plants distributed around citrus orchards. The host plants of S. dorsalis surrounding citrus orchards were determined to include 32 families, 54 species: 39 woody plant species and 15 herbaceous plant species. The host plants which related to the occurrence of 1st generation of S. dorsalis were Lonicera japonica, Clematis apiifolia, Hedera rhombea, and Viburnum awabuki. The occurrence of 1st generation S. dorsalis was estimated to be due to overwintered female adults having laid eggs into those plants from late March to early April, and the new adults having emerged from late April to late May. The host plants which were associated with fruit damage of citrus were Mallotus japonicus, and Camellia japonica, as well as creeping plants such as Clematis apiifolia, Paederia scandens and Cayratia japonica. The adult phase density of S. dorsalis caught on yellow-color sticky traps placed on the citrus trees on the edge of the citrus orchard. S. dorsalis were predominantly 3rd generation from late of June to early of July, and 6th generation from late of August to early of September, and their numbers were directly related to the degree of damage caused to the citrus fruit. The density of S. dorsalis depended on the number of new growing shoots of host plants, which indicated that the immigration of adults of S. dorsalis to the citrus was based in the suitability of host plants surrounding the orchards.

White OLED Structures Optimized for RGB and RGBW Formats

  • Hatwar, T.K.;Spindler, J.P.;Ricks, M.L.;Young, R.H.;Cosimbescu, L.;Begley, W.J.;Slyke, S.A. Van
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.816-819
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    • 2004
  • White-emitting OLEDs have been prepared that provide emission close to 6500 K color temperature (D65) with exceptional stability and high efficiency. The combination of host and dopant materials offers significant improvement for full color displays, in terms of power consumption, with minimal changes in color and efficiency with current density. These features are important for fabricating RGB and RGBW full color displays using white OLEDs with color filters.

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