A5018033564- Nematode management and characterization studies
- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Agriculture, Soil, Plant Science
- Ecology and Conservation Studies
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Parasite Biology and Host Interactions
- Microwave and Dielectric Measurement Techniques
- Food Quality and Safety Studies
- Entomopathogenic Microorganisms in Pest Control
- Energy and Environmental Systems
- Electromagnetic Compatibility and Measurements
- Plant Disease Resistance and Genetics
- Helminth infection and control
- Electromagnetic wave absorption materials
- GABA and Rice Research
- Agronomic Practices and Intercropping Systems
- Insect and Arachnid Ecology and Behavior
- Soybean genetics and cultivation
- Plant Disease Management Techniques
- Nutrition, Health and Food Behavior
- Microbial Inactivation Methods
- Rocket and propulsion systems research
- Irrigation Practices and Water Management
Rural Development Administration
2017-2025
National Institute of Agricultural Science and Technology
2006-2024
Instituto de Ciencias Agrarias
2023
Korea Advanced Institute of Science and Technology
2010-2018
National Academy of Agricultural Science
2008-2016
Cyst nematodes are among the major plant-parasitic worldwide, and they cause significant damage to Brassicaceae crops, including Kimchi-cabbage, in Korea. To survey incidence of cyst Kimchi-cabbage fields, 469 soil samples were collected from main producing areas between 2018 2021. Only belonging genus <i>Heterodera</i> investigated, overall nematode was found be 40%. Regionally, highest observed Taebaek, reaching 89%, with mean densities cysts eggs per 500 cm³ recorded at 522...
Cyst nematodes, some of the most important plant-parasitic nematodes globally, cause major damage to Chinese cabbage and soybean plants in Korea. Cysts are commonly used for cyst nematode bioassays because many eggs included inside cyst. Traditionally, cysts extracted from soil using paper strip method or centrifugal flotation (CFM) combined with sieving. The specific gravity sugar solution (SGSS) is often CFM; however, efficiency extraction egg hatching CFM has not been studied. In this...
In this letter, we present a multiframe L-slot planar dipole loaded with single microstripline for multiband antenna systems. The is achieved by creating on host and also loading the to generate couple of shunts series capacitive gaps an inductive strip, eventually forming LC-like resonators. supports several wireless communication bands including: LTE at 1.7 ~ 1.8 2.3 2.6 GHz; WLAN 2.4 2.5, 5.2, 5.8 WiBro/WiMAX 3 4 GHz. addition, validate behaviors, proposed simple equivalent circuit...
Since 2009, the Korean Society of Plant Pathology has established Committee on Common Names Disease to systematically review and determine plant disease names related terminologies. The committee published 6th edition List Diseases in Korea (LPDK) 2022, list been made publicly accessible online. online database significantly enhanced user accessibility, expedited update processes, improved interoperability with other databases. As a result, 6.1 was released by LPDK 2023, detailing new added...
A compact multiband internal antenna covering LTE/GSM/GPS/DCS/PCS/UMTS bands (748-960 and 1575.42-2690 MHz) is presented for mobile terminals. The combines a coupled-fed scheme magneto-dielectric material, which has low loss properties (magnetic tangent <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$ < 0.08$</tex></formula> ) up to 3 GHz, thereby achieving not only reduced size but also improved...
A planar slotted waveguide array antenna has been designed at 9.37 GHz for X-band radar applications. The consists of multiple branchline waveguides with broadwall radiating shunt slots and a main to feed the branch through series inclined coupling slots. point is located center waveguide. Element weights in have calculated bysampling continuous circular Taylor aperture distribution 25 dB sidelobe level both E Hplanes. commercially available electromagnetic (EM) simulation tool used...
Abstract In a survey of plant-parasitic nematodes in agricultural fields, cyst-forming were found soil planted bamboo Korea. The aim this study was to identify the cyst based on morphological and molecular characteristics. As results, morphology morphometrics cysts second-stage juveniles (J2s) consistent with those previous descriptions Heterodera koreana . phylogenetic analyses DNA sequences, these clustered together clade H. internal transcribed spacer (ITS) region, large subunit D2-D3...
A miniaturized microstrip-to-coplanar strip transition and its antenna application are presented in this letter. composite right/left-handed transmission line planar artificial lines used to design the 2.4-GHz band balance output of over a wider frequency range. In addition, occupied area is only 0.087λg <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The 3-dB back-to-back insertion loss bandwidth around 84%. Based on proposed...
The short-term effects of low-level contamination by heavy metals (As, Cd, Cu, and Pb) on the soil health were examined analyzing nematode community in soils planted with tomatoes. For this, irrigated five metal concentrations ([1, 1/4, 1/42, 1/43, 0] × maximum [MC] detected irrigation waters near abandoned mine sites) for 18 weeks. Heavy significantly increased MC metals, among which As Cu exceeded residue contents approved Korea. In no treatment controls, abundances all trophic groups...
ABSTRACT RecQ, which encodes a DNA helicase, was selected in searching for marker gene of Bacillus subtilis and related species via genome mining. RecQ sequence similarity type strains among used this study ranged from 66.2% to 96.6%, whereas orthologous average nucleotide identity 72.6% 95.8%. According the phylogenetic tree based on recQ sequences, each strain all or subspecies placed unique taxonomic position. Four B. subspecies, tequilensis vallismortis were grouped one cluster (cluster...
More than a year has passed after the 6th edition of ‘List Plant Diseases in Korea (LPDK)’ was published April 2022. The 6.1st (2023) List made by correcting errors found list and adding new diseases reported edition. There were 397 corrections from edition, most which simple spelling or minor issues. However, 12 deleted due to duplication unclear literature proof, 2 had their diseases’ common names changed. We added 158 that before 2021 but not included After all, 146 6,534 resulting total...
A theoretical model of a cylindrical ferrite resonator antenna with dc magnetic bias, applied in the direction parallel to height, is proposed. HE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> mode splitting behavior caused by tensor nature permeability biased investigated. The proposed validated through an experimental investigation antenna. This communication utilizes Li-ferrite suitable for applications. presented theory shown...
이 연구는 Citrus속 과수재배지에서 식물기생선충의 종류와 분포를 조사하기 위해 수행하였다. 토양 샘플은 주요 재배지에서 2008년 4월부터 8월에 채집하였다. 식물기생선충은 전체 178개 샘플 가운데 139개 샘플에서 검출되었다. 감귤재배지에서 Tylenchulus semipenetrans가 178토양샘플 중 139 검출되었고(90.4%), 유자재배지는 94 토양샘플 85토양 T. 검출되었다(71.4%). 그러나 주요한 종류는 다소 차이가 있었다. 국내 과수 재배지에는 널리 분포하고 있었으며, 감귤과수에 가장 중요한 식물기생선충임을 확인하였다. 재배 년수가 증가할수록 semipenetrans의 검출빈도가 증가하였다. 또 토양산도가 알칼리성으로 갈수록 감귤선충의 밀도는 증가하였으나, 상관계수는 높지 않았다. This study was conducted to identify plant-parasitic nematodes and determine the distribution...
A accurate method of calculating a magnetization and permeability tensor ferrites is proposed in this paper. We introduce cylindrical ferrite resonator that located between parallel metal plates. theoretically derive exact eigenvalue equations for the mode-splitting phenomenon HE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> mode. also show behavior depends on single value ferrite. The components are computed from measured resonant...
This paper presents a theoretical model of cylindrical ferrite resonator (FR) antenna that predicts resonance frequencies, the frequency tuning range, and radiation patterns. The FR is placed on PEC ground plane excited by coaxial probe with dc magnetic bias field applied in direction transverse to plane. An open-boundary predict introduced compared measured results. all-boundary good agreement results other models. discrepancy proposed less than 3%. HE <sub...
In this letter, we describe the Doppler phenomenon according to some antenna configurations in a reverberation chamber. The spread spectra with rotational velocities of RX using platform stirring are described. effects single and multiple antennas at 2.6GHz characterized by polarization spatial parameters.