E-Pulse와 신경망을 이용한 표적 구분에 관한 연구

이승재(Seung-Jae Lee),최인식(In-Sik Choi),E. J. Rothwell 한국정보기술학회 2012 Proceedings of KIIT Conference Vol.2012 No.5

레이다 표적 인식을 위한 특성벡터로는 초기 시간 영역 응답의 산란점과 후기 시간 영역 응답인 고유 주파수가 있다. 본 논문에서는 레이다 표적 구분을 위해 고유 주파수를 사용하는 E-Pulse 기법을 이용하여 세 가지 종류의 선형 표적에 대해 표적 구분 실험을 수행하였다. 그리고, E-Pulse 기법을 사용하여 추출된 고유 주파수를 multi-layerd perceptron(MLP) 신경망 구분기의 입력으로 사용하여 표적 구분 성능 실험을 수행하였으며, SNR의 따른 표적 구분 확률을 확인하였다. Feature vectors used for radar target recognition are scattering centers of early time response and natural frequencies of late time response. In this paper, we performed radar target classification for three types of wire targets. E-Pulse method is used for the natural frequency extraction. The extracted natural frequency is used as input for the multi-layerd perceptron(MLP) neural network classifier. In the results, we show the target classification probability with respect to SNR.

Genetic Identification and Phylogenetic Analysis of Anaplasma and Ehrlichia Species in Haemaphysalis longicornis Collected from Jeju Island, Korea

Oh, Jae-Young,Moon, Bong-Chun,Bae, Bo-Kyoung,Shin, E-Hyun,Ko, Young-Hwan,Kim, Young-Joo,Park, Yong-Ho,Chae, Joon-Seok The Korean Society for Microbiology 2009 Journal of Bacteriology and Virology Vol.39 No.4

A total of 1,395 Haemaphysalis longicornis ticks collected from Jeju Island of Korea were examined by 16S rRNA gene-based nested PCR for the presence of infection with Anaplasma and Ehrlichia species. Template DNAs to detect the tick-borne pathogens were prepared from a total 506 tick pools. Eight genera of Anaplasma and six Ehrlichia by 16S rRNA gene PCR and sequencing analysis were identified. A. phagocytophilum was the most prevalent (27 [1.9%]) by nested PCR, followed by A. bovis (5 [0.4%]), E. chaffeensis (4 [0.2%]), and A. centrale (1 [0.1%]). In the phylogenetic analysis based on 16S rRNA sequences, eight genera of Anaplasma group (> 99.4% homology) and six Ehrlichia group (> 99.5% homology) were close to deposited A. marginale strains (AF309867, AF414874, and FJ226454) and Ehrlichia sp. (DQ324547), respectively. Three Anaplasma species groups A. phagocytophilum (group A), A. bovis (group B), and A. centrale (group C) and one Ehrlichia species E. chaffeensis (group D) were determined by comparing with Anaplasma and Ehrlichia related sequences. First, twenty-eight A. phagocytophilum clones belonging to group A were divided into 7 genotypes. The sequence similarity among genotypes A1 to A4 was very high (> 99.6%). Genotype B2 was close to A. bovis from Korea (99.7%). Genotype D1 was close to known E. chaffeensis strains (M73222, AF147752, and AY350424) and their similarity value was 99.7%. In conclusion, the genera of Anaplasma/Ehrlichia, A. phagocytophilum, and E. chaffeensis identified in predominant H. longicornis ticks were ubiquitous throughout the Jeju Island. The various native groups have been found through sequence identities and phylogenetic analysis.

Amino acid residues in the Ler protein critical for derepression of the LEE5 promoter in enteropathogenic E. coli

Su-Mi Choi,Jae-Ho Jeong,Hyon E. Choy,Minsang Shin 한국미생물학회 2016 The journal of microbiology Vol.54 No.8

Enteropathogenic E. coli causes attaching and effacing (A/E) intestinal lesions. The genes involved in the formation of A/E lesions are encoded within a chromosomal island comprising of five major operons, LEE1-5. The global regulator H-NS represses the expression of these operons. Ler, a H-NS homologue, counteracts the H-NS–mediated repression. Using a novel genetic approach, we identified the amino acid residues in Ler that are involved in the interaction with H-NS: I20 and L23 in the C-terminal portion of α-helix 3, and I42 in the following unstructured linker region.

The association between insulin resistance and depression in the Korean general population

Lee, Jae-Hon,Park, Sung Keun,Ryoo, Jae-Hong,Oh, Chang-Mo,Mansur, Rodrigo B.,Alfonsi, Jeffrey E.,Cha, Danielle S.,Lee, Yena,McIntyre, Roger S.,Jung, Ju Young Elsevier 2017 Journal of affective disorders Vol.208 No.-

<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Previous studies showed that the insulin resistance (IR) could be related to depression. However, this association is still equivocal in the general population. Herein, we aimed to investigate the association between IR and depressive symptoms in a large sample in South Korea.</P> <P><B>Methods</B></P> <P>A cross-sectional study was carried out for 165,443 Korean men and women who received a health checkup including various clinical parameters and the Center for Epidemiologic Studies Depression scales (CES-D). Subjects were stratified into subgroups by CES-D score, sex, age, and presence of diabetes. The odd ratios (ORs) for homeostasis model assessment of insulin resistance (HOMA-IR) were compared between groups using multivariable logistic regression analyses.</P> <P><B>Results</B></P> <P>After adjusting covariates (e.g. smoking, family income, marriage state, unemployment status, average alcohol use, BMI, physical activity, systolic blood pressure, diabetes), increased IR was weakly associated with greater depressive symptoms (adjusted OR=1.01 [95% CI 1.0001–1.03]). Subgroup analysis revealed this association was statistically significant in females (adjusted OR=1.03, [95% CI 1.001–1.06]), non-diabetic group (adjusted OR=1.04, [95% CI 1.02–1.06]), and young participants under the age of thirty (adjusted OR=1.17, [95% CI 1.07–1.27]). But we couldn’t find significant association in diabetic and middle to elderly participants.</P> <P><B>Conclusions</B></P> <P>This study demonstrates that there is a relationship between IR and depressive symptoms in the Korean general population. Results from this epidemiological study revealed that young adults and non-diabetic individuals with increased IR may be related with depressive symptoms.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Increased insulin resistance was associated with depressive symptoms in the Korean general population (N=165,443). </LI> <LI> The subgroup analysis revealed the association was statistically significant in female, non-diabetic and young groups. </LI> <LI> Increased insulin resistance in non-diabetic participants was more strongly associated with depressive symptoms. </LI> <LI> These findings suggest that early management of insulin resistance may prevent progression toward depressive symptoms. </LI> </UL> </P>

동물성 식품내 퀴놀론계 항균물질 검출을 위한 여지디스크배지 확산법

손성완,Zomer, E,Charm, S. E.,Clydesdale, F. M.,조병훈,이혜숙,박종명,이재진,이영순 한국수의공중보건학회 1999 예방수의학회지 Vol.23 No.4

A field study of colloid transport in surface and subsurface flows

Zhang, Wei,Tang, Xiang-Yu,Xian, Qing-Song,Weisbrod, Noam,Yang, Jae E.,Wang, Hong-Lan Elsevier, etc 2016 Journal of hydrology Vol.542 No.-

<P><B>Abstract</B></P> <P>Colloids have been recognized to enhance the migration of strongly-sorbing contaminants. However, few field investigations have examined combined colloid transport via surface runoff and subsurface flows. In a headwater catchment of the upper Yangtze River, a 6m (L) by 4m (W) sloping (6°) farmland plot was built by cement walls to form no-flow side boundaries. The plot was monitored in the summer of 2014 for the release and transport of natural colloids via surface runoff and subsurface flows (i.e., the interflow from the soil-mudrock interface and fracture flow from the mudrock-sandstone interface) in response to rain events. The water sources of the subsurface flows were apportioned to individual rain events using a two end-member model (i.e., mobile pre-event soil water extracted by a suction-cup sampler <I>vs</I>. rainwater (event water)) based on <I>δ</I> <SUP>18</SUP>O measurements. For rain events with high preceding soil moisture, mobile pre-event soil water was the main contributor (generally >60%) to the fracture flow. The colloid concentration in the surface runoff was 1–2 orders of magnitude higher than that in the subsurface flows. The lowest colloid concentration was found in the subsurface interflow, which was probably the result of pore-scale colloid straining mechanisms. The rainfall intensity and its temporal variation govern the dynamics of the colloid concentrations in both surface runoff and subsurface flows. The duration of the antecedent dry period affected not only the relative contributions of the rainwater and the mobile pre-event soil water to the subsurface flows but also the peak colloid concentration, particularly in the fracture flow. The <10μm fine colloid size fraction accounted for more than 80% of the total suspended particles in the surface runoff, while the colloid size distributions of both the interflow and the fracture flow shifted towards larger diameters. These results highlight the need to avoid the application of strongly-sorbing agrochemicals (e.g., pesticides, phosphorus fertilizers) immediately before rainfall following a long no-rain period because their transport in association with colloids may occur rapidly over long distances via both surface runoff and subsurface flows with rainfall.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Subsurface flow was apportioned into rainwater and mobile pre-event soil water. </LI> <LI> The duration of no-rain period affects peak colloid concentration. </LI> <LI> Rainfall intensity and its temporal variation govern colloid discharge dynamics. </LI> </UL> </P>

A comparative estimation of reference evapotranspiration and bare soil evaporation for different area in Korea by E-DiGOR model

Mehmet Aydin(메흐멧 아이딘),Yeong-Sang Jung(정영상),Hyun-Il Lee(이현일),Kyung-Dae Kim(김경대),Jae E. Yang(양재의) 한국토양비료학회 2012 한국토양비료학회 학술발표회 초록집 Vol.2012 No.10

Simulation of Soil Hydrological Components in Chuncheon over 30 years Using E-DiGOR Model

Mehmet Aydin,Yeong-Sang Jung,Jae E. Yang,Hyun-Il Lee,Kyung-Dae Kim 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.4

The hydrological components of a sandy loam soil of nearly level in Chuncheon over 30 years were computed using the E-DiGOR model. Daily simulations were carried out for each year during the period of 1980 to 2009 using standard climate data. Reference evapotranspiration and potential soil evaporation based on Penman-Montheith model were higher during May to August because of the higher atmospheric evaporative demand. Actual soil evaporation was mainly found to be a function of the amount and timing of rainfall, and presumably soil wetness in addition to atmospheric demand. Drainage was affected by rainfall and increased with a higher amount of precipitation and soil water content. Excess drainage occurred throughout rainy months (from July to September), with a peak in July. Therefore, leaching may be a serious problem in the soils all through these months. The 30-year average annual reference evapotranspiration and potential soil evaporation were 951.5 ㎜ and 714.2 ㎜, respectively. The actual evaporation from bare soil varied between 396.9-528.4 ㎜ and showed comparatively lesser inter-annual variations than drainage. Annual drainage rates below 120 cm soil depth ranged from 477.8 to 1565.9 ㎜. The long-term mean annual drainage-loss was approximately two times higher than actual soil evaporation.

Simulation of Soil Hydrological Components in Chuncheon over 30 years Using E-DiGOR Model

Aydin, Mehmet,Jung, Yeong-Sang,Yang, Jae-E.,Lee, Hyun-Il,Kim, Kyung-Dae Korean Society of Soil Science and Fertilizer 2012 한국토양비료학회지 Vol.45 No.4

The hydrological components of a sandy loam soil of nearly level in Chuncheon over 30 years were computed using the E-DiGOR model. Daily simulations were carried out for each year during the period of 1980 to 2009 using standard climate data. Reference evapotranspiration and potential soil evaporation based on Penman-Montheith model were higher during May to August because of the higher atmospheric evaporative demand. Actual soil evaporation was mainly found to be a function of the amount and timing of rainfall, and presumably soil wetness in addition to atmospheric demand. Drainage was affected by rainfall and increased with a higher amount of precipitation and soil water content. Excess drainage occurred throughout rainy months (from July to September), with a peak in July. Therefore, leaching may be a serious problem in the soils all through these months. The 30-year average annual reference evapotranspiration and potential soil evaporation were 951.5 mm and 714.2 mm, respectively. The actual evaporation from bare soil varied between 396.9-528.4 mm and showed comparatively lesser inter-annual variations than drainage. Annual drainage rates below 120 cm soil depth ranged from 477.8 to 1565.9 mm. The long-term mean annual drainage-loss was approximately two times higher than actual soil evaporation.

A Network of Substrates of the E3 Ubiquitin Ligases MDM2 and HUWE1 Control Apoptosis Independently of p53

Kurokawa, Manabu,Kim, Jiyeon,Geradts, Joseph,Matsuura, Kenkyo,Liu, Liu,Ran, Xu,Xia, Wenle,Ribar, Thomas J.,Henao, Ricardo,Dewhirst, Mark W.,Kim, Wun-Jae,Lucas, Joseph E.,Wang, Shaomeng,Spector, Neil L AAAS 2013 Science signaling Vol.6 No.274

<P><B>Breaking Down to Build Resistance</B></P><P>Chemotherapeutic resistance often arises because of the rewiring of signaling pathways in cancer cells. Kurokawa <I>et al.</I> found that the ubiquitin E3 ligase MDM2 triggered the breakdown of another ubiquitin E3 ligase, HUWE1. In breast cancer cells that died when exposed to the HER2 (human epidermal growth factor receptor 2) EGFR (epidermal growth factor receptor) tyrosine kinase inhibitor lapatinib, MDM2 was degraded, which enabled HUWE1 to trigger the degradation of a prosurvival protein and promote assembly and activation of a protein complex required for the execution of cell death. However, MDM2 degradation did not occur in lapatinib-resistant breast cancer cells, and thus, the abundance of HUWE1 was decreased, promoting cell survival. In a mouse xenograft model, an inhibitor of MDM2 reduced the growth of tumors generated from lapatinib-resistant breast cancer cells. Thus, MDM2 could be targeted to circumvent resistance to lapatinib in breast cancers.</P>