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( Yeon Soo Chung ),( Yoon Sung Hu ),( Chan Hee Lee ),( Cheong Ung Kim ),( Young Kyung Park ),( Sook Shin ),( Kun Taek Park ),( Soo Jin Yang ),( Suk Kyung Lim ),( Yong Ho Park ) 대한인수공통전염병학회 2016 창립총회 및 학술대회 초록집 Vol.2016 No.1
Introduction: The cross-transmission of AR bacteria between humans and companion animals has been widely investigated. However, these previous studies only show the possibility of cross-transmission of AR bacteria between humans and companion animals. Actually, a secondary bacterial transmission (person to person) frequently occurs in confined environments such as schools between students and their family members.Therefore, we compared the genetic similarity of AR E. coli isolates from owners of dogs and non-owners sharing the same class room and their family members. Methods: A total of 129 swab samples were collected from owners of dogs and non-owners in veterinary college and households located in Seoul, Korea.Owner samples(n=35) were collected from 16 under-graduate students of veterinary college (external auditory meatus, 7 samples; nasal cavity, 7 samples; medial side of arms, 7 samples; anus, 11 samples) and 3 family members of them (anus, 3 samples). Non-owner samples (n=94) were collected from 42 under-graduate students sharing the same classroom with 16 owner-students (external auditory meatus, 20 samples; nasal cavity, 20 samples; medial side of arms, 20 samples; anus, 28 samples) and 6 family members of them (anus, 6 samples).The isolation of E. coli was conducted by selective media such as Escherichia coli broth and MacConkey agar plate. For identification of E. coli,PCR method targeting 16S rRNA gene was used in this study.The characterization of antibiogram of isolated E. coli was verified by a disk diffusion test and detection of the corresponding antimicrobial resistance genes according to the Clinical and Laboratory Standards Institute(CLSI).The relative risks (RRs) and their 95% confidence intervals (95% CI) of isolation and AR rates in E. coli isolates from owners and non-ownerswere calculated using SPSS software pack.To identify the cross-transmission of E. coli isolates between owners and non-owners, the genetic relatedness of E. coli isolates was determined by standard pulsed-field gel electrophoresis (PFGE). Results: Atotal of 32 E. coli isolates (32/129 isolates; 24.8%) were collected from 129 swab samples. The isolation rate of E. coli in owners (9/35 isolates; 25.7%) was similar to that in non-owners (23/94 isolates; 24.5%).According to the calculated RRs, living in homes with dogs was associated with a decreased prevalence of AR E. coli isolates (crude RR, 1.3; 95% CI, 0.5 - 1.9). The analysis of genetic relatedness of E. coli isolates showed that except for 8 isolates clustered into three clonal sets, most isolates showed diverse PFGE types which indicated a weak genetic similarity. Conclusion: Unlike our expectation, the results indicated that the possibility of secondary cross-transmission of AR E. coli between students and their family members was low as well as within classmates. Individual body conditions, private sanitary habits such as hand washing and house cleaning might affect to good hygiene of students. Many previous studies have emphasized the significance of hand washing in controlling infection and cross-transmission of pathogens, especially bacteria. Therefore, the further studies are needed to evaluate the protective effect of individual sanitary habits such as frequency of hand washing on secondary AR bacterial transmission in class room. References: 1. Hyang-Mi Nam, et al. Prevalence of antimicrobial resistance in fecal Escherichia coli isolates from stray pet dogs and hospitalized pet dogs in Korea. Microbial Drug Resistance, 2010. 16(1): p. 75-79.1.
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최범휘(Beom-Hwi Choi),이재준(Jae-Jun Lee),한현택(Hyeon-Taek Han),최연웅(Yeon-Ung Choi),조우성(Woo-seong Cho),이해연(Hae-Yeoun Lee) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11
사람 음성 활동 감지는 스마트 홈이나 자동차 등 다양한 응용 분야에서 활용될 수 있으며, 딥러닝 기술을 이용한 연구들도 수행되고 있다. 본 논문에서는MobileNet 딥러닝 모델을 이용하여 사운드 세그먼트에 사람음성 활동이 있는지 검출하는 모델을 제안한다. 사운드 세그먼트의 MFCC 특징 추출을 위하여 MFCC 특징을 추출하였고, CNN 기반의 모델들보다 연산 복잡도가 최소화되고 의미있는 특징 데이터를 학습할 수 있는 MobileNet을 도입하여 최적화를 수행하였다. 이를 통하여 95.52% 정확도로 사람 음성 활동 여부를 검출하였다. Voice activity detection of human can be used in various applications such as smart homes and automobiles, and researches using deep learning technology are being conducted. In this paper, we propose a voice activity detection model of human in sound segments using MobileNet. The MFCC features were extracted as features of the sound segments. Also, MobileNet, which has lower computational complexity than CNN-based models and can learn meaningful features, is applied and optimized. As a result, voice activity detection was performed with 95.52% accuracy.
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Lee, Yeon Gyu,Choi, Yang Ho,Jeong, Da Un,Lee, Jung Sick,Kim, Yong Wan,Park, Jung Jun,Choi, Jae Ung PERGAMON 2016 MARINE POLLUTION BULLETIN Vol.109 No.1
<P><B>Abstract</B></P> <P>Tidal current survey as well as geochemical and benthic foraminiferal analyses of sediment cores were conducted in an abalone farm and a <I>Zostera</I> bed to understand the degree to which the abalone farm facilities installed along a channel in a shallow sea affect the benthic environment and ecology. In the abalone farm, <I>Ammonia beccarii</I>-<I>Pseudoparrella naraensis</I>-<I>Elphidium somaense</I>-<I>Rosalina globularis</I>-<I>Trochammina hadai</I> and <I>P. naraensis</I>-<I>E. somaense</I>-<I>A. beccarii</I>-<I>T. hadai</I> assemblages appeared owing to an increase in the total nitrogen content from the biodeposits. The <I>Zostera</I> bed consisted of <I>A. beccarii</I>-P<I>. naraensis</I>-<I>Buccella frigida</I>-<I>T. hadai</I> assemblage owing to the gradual expansion of a brackish shallow-water environment by the rapidly decreasing current speed, and it may have flourished. Moreover, the total sulfur, Zn, Cr, and Cu contents in the sediments decreased remarkably more than those of the pre-abalone farming did, caused by the vigorous activity of <I>Zostera marina</I> physiology.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The effect of abalone farm facilities on the benthic foraminifera and <I>Zostera</I> bed </LI> <LI> <I>Trochammina hadai</I> increased by inflow of total nitrogen content from the biodeposits. </LI> <LI> <I>Zostera bed</I> expanded brackish-water environment by the decreasing current speed. </LI> <LI> <I>Zostera bed</I> may have flourished and undergone the increase of <I>Trochammina hadai</I>. </LI> <LI> Trace metal contents decreased remarkably by the activity of <I>Z. marina</I> physiology. </LI> </UL> </P>
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이주연,이무석,윤진상,양종철,문지웅,정해원,은성종 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.6
Objectives : The purpose of this study was to investigate the stress coping strategies and psychological charactehstics, such as combined psychopathology and tendency of symptom interpretation, in patients with somatization disorder. Methods : Thirty patients meeting the criteria of DSM-IV somatization disorder were compared with thirty controls. We evaluated the subjects using Symptom Checklist-90-Revised (SCL-90-R), Somato-Sensory Amplification Scale (SSAS), Symptom Interpretation Questionnaire (SIQ), and The Ways of Stress Coping Questionnaire (SCQ). Independent t-test and Pearson correlation analysis were used. Results : From the results of SCL-90-R subscales, the scores of somatization, obsession-compulsion, depression, anxiety, and psychoticism were significantly higher in patients with somatization disorder than nonnal controls. Somatization disorder patients had greater amplification of physical sensation in SSAS and significantly higher score in physical interpretation of SIQ compared with psychological or environmental interpretation, In the SCQ of somatization disorder patients, we observed generallylower levels of total coping scores than the control group and significant positive correlation between passive coping style of SCQ and psychological interpretation of SIQ. Conclusion : These results show that patients with somatization disorder have various psychopathology, greater amplification of physical sensation, physical interpretation tendency of symptoms, and insufficient copying strategy.
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Hwang, Jang-Yeon,Myung, Seung-Taek,Choi, Ji Ung,Yoon, Chong Seung,Yashiro, Hitoshi,Sun, Yang-Kook Royal Society of Chemistry 2017 Journal of Materials Chemistry A Vol.5 No.45
<P>A surface-modified O3-type Na[Ni0.6Co0.2Mn0.2]O2 cathode was synthesized by Al2O3 nanoparticle coating using a simple dry ball-milling route. The nanoscale Al2O3 particles (∼15 nm in diameter) densely covering the spherical O3-type Na[Ni0.6Co0.2Mn0.2]O2 cathode particles effectively minimized parasitic reactions with the electrolyte solution while assisting Na<SUP>+</SUP> migration. The proposed Al2O3 coated Na[Ni0.6Co0.2Mn0.2]O2 cathode exhibited a high specific capacity of 151 mA h g<SUP>−1</SUP>, as well as improved cycling stability and rate capability in a half cell. Furthermore, the Al2O3 coated cathode was scaled up to a pouch-type full cell using a hard carbon anode that exhibited a superior rate capability and capacity retention of 75% after 300 cycles with a high energy density of 130 W h kg<SUP>−1</SUP>. In addition, the post-mortem surface characterization of the cathodes from the long-term cycled full cells helped in identifying the exact mechanism of the surface reaction with the electrolyte and the reason for its subsequent degradation and showed that the nano-scale Al2O3 coating layer was effective at resolving the degradation pathways of the cathode surface from hydrogen fluoride (HF) attack.</P>
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Choi, Ji Ung,Kim, Jongsoon,Hwang, Jang-Yeon,Jo, Jae Hyeon,Sun, Yang-Kook,Myung, Seung-Taek unknown 2019 Nano energy Vol.61 No.-
<P><B>Abstract</B></P> <P>We propose P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB>, which is rationally designed as a promising cathode material for high-performance potassium-ion batteries (KIBs). Its composition adopts the use of the valence state of Mn above 3.5 + to minimize the disruptive effect of Jahn–Teller distortion in the MnO<SUB>6</SUB> octahedra during the electrochemical reaction. Unlike other types of layered materials that suffer from the sluggish diffusion of large potassium ions accompanying multi-step voltage profiles, P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB> delivers a high specific discharge capacity of 120.4 mAh (g-oxide)<SUP>−1</SUP> with smooth charge and discharge curves. First-principles calculations predict an activation barrier energy of ∼260 meV for a large K<SUP>+</SUP> diffusion, which is comparable to those observed in conventional layered cathode materials for lithium-ion batteries. As a result, even at 500 mA g<SUP>−1</SUP>, P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB> is able to deliver a high discharge capacity of 78 mAh g<SUP>−1</SUP>, which is a retention of 65% versus the capacity obtained at 20 mA g<SUP>−1</SUP>. Combination studies using <I>operando</I> X-ray diffraction, the <I>ex-situ</I> X-ray absorption near-edge structure, and first-principles calculations elucidate the nature of the excellent potassium storage mechanism of K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB>. This work provides a new insight for the development of efficient cathode materials for KIBs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB> is a new promising cathode for potassium-ion batteries. </LI> <LI> It has a high reversible capacity with excellent power capability in half cells. </LI> <LI> The low activation barrier energy promotes fast diffusion K<SUP>+</SUP> ions in the structure. </LI> <LI> It shows a single-phase reaction with reduced J-T distortion during cycles. </LI> <LI> It can be applicable to full cells with hard carbon anode having high reversible capacity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>We rationally design a new cathode material, P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB>, for potassium-ion batteries. The co-existence of Co<SUP>3+</SUP> and Mn<SUP>4+</SUP> in P3-K<SUB>0.54</SUB>[Co<SUB>0.5</SUB>Mn<SUB>0.5</SUB>]O<SUB>2</SUB> is highly effective at improving the structural stability by moderating the extent of the irreversible multiphase transformation, resulting in good cycling stability and rate capability.</P> <P>[DISPLAY OMISSION]</P>
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