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텍스트마이닝을 활용한 미국 대통령 취임 연설문의 트렌드 연구
조수곤(Su Gon Cho),조재희(Jaehee Cho),김성범(Seoung Bum Kim) 대한산업공학회 2015 대한산업공학회지 Vol.41 No.5
Identification of meaningful patterns and trends in large volumes of text data is an important task in various research areas. In the present study, we propose a procedure to find meaningful tendencies based on a combination of text mining, cluster analysis, and low-dimensional embedding. To demonstrate applicability and effectiveness of the proposed procedure, we analyzed the inaugural addresses of the presidents of the United States from 1789 to 2009. The main results of this study show that trends in the national policy agenda can be discovered based on clustering and visualization algorithms.
조수제 ( Su-je Cho ),최승열 ( Seoung-yeol Choi ),안재용 ( Jae-yong An ),홍성수 ( Sung-su Hong ),최홍용 ( Hong-yong Choi ) 한국정보처리학회 2021 한국정보처리학회 학술대회논문집 Vol.28 No.2
최근 산업 현장에서 많은 안전사고가 일어나고 있고, 현장 노동력의 부족으로 무인 로봇 시스템들을 도입하는 등 다양한 변화를 맞이하고 있다. 이에 차세대 자동화 시스템은 보다 유연하고 지능적이어야 한다. AGV(Automatic Guided Vehicle)의 경우 실시간으로 변하는 현장에 대응하기 어렵고, 새로운 어플리케이션에 대한 제품개발의 어려움이 따른다. 이에 대한 대안으로 AGV 인식 스택을 재구축하여 인간과 동일한 공간인식 능력을 갖춘 AMR(Autonomous Mobile Robot)이 대두되고 있다. 본 연구에서는 SLAM과 ROS를 이용하여 AMR의 기능을 구축하였다. YD Lidar 센서와 SLAM을 이용하여 주변 환경을 지도화 하여 로봇의 현재 위치를 파악할 수 있도록 제작하였고, 직접 지도상의 최적 경로를 파악하여 주변 장애물을 회피하며 주행할 수 있음을 확인하였다. DC 모터의 응답 특성에 따라 주행 속도, 조향각 등을 제어할 수 있도록 구현하였다.
Cho, Soo-Yeon,Yu, Hayoung,Choi, Junghoon,Kang, Hohyung,Park, Seoungwoong,Jang, Ji-Soo,Hong, Hye-Jin,Kim, Il-Doo,Lee, Seoung-Ki,Jeong, Hyeon Su,Jung, Hee-Tae American Chemical Society 2019 ACS NANO Vol.13 No.8
<P>Weavable sensing fibers with superior mechanical strength and sensing functionality are crucial for the realization of wearable textile sensors. However, in the fabrication of previously reported wearable sensing fibers, additional processes such as reduction, doping, and coating were essential to satisfy both requirements. The sensing fibers should be continuously synthesized in a scalable process for commercial applications with high reliability and productivity, which was challenging. In this study, we first synthesize mass-producible wearable sensing fibers with good mechanical properties and sensing functionality without additional processes by incorporating carbon nanotubes (CNTs) into distinct nanocellulose. Nanocellulose extracted from tunicate (TCNF) is homogeneously composited with single-walled CNTs, and composite fibers (TCNF/CNT) are continuously produced in aligned directions by wet spinning, facilitating liquid-crystal properties. The TCNF/CNT fibers exhibit a superior gas (NO<SUB>2</SUB>)-sensing performance with high selectivity and sensitivity (parts-per-billion detection). In addition, the TCNF/CNT fibers can endure complex and harsh distortions maintaining their intrinsic sensing properties and can be perfectly integrated with conventional fabrics using a direct weaving process. Our meter-scale scalable synthesis of functional composite fibers is expected to provide a mass production platform of versatile wearable sensors.</P> [FIG OMISSION]</BR>
Cho, Kwang-Soo,Hong, Su-Young,Han, Young-Han,Yoon, Bong-Kyeong,Ryu, Seoung-Ryeol,Woo, Jong-Gyu The Korean Society of Crop Science 2008 Journal of crop science and biotechnology Vol.11 No.2
To identify inheritance of clubroot disease resistance genes in Chinese cabbage, seedling tests of $BC_1P_1,\;BC_1P_2$, and $F_2$ populations derived from $F_1$ hybrid(var. CR Saerona) using single spore isolate(race 4 identified with William's differential host) from Plasmodiophora brassciae were conducted. Resistance(R) and susceptible(S) plants segregated to 1:0 in backcross to the resistant parent. The $F_2$ population segregated in a 3(R):1(S) ratio. This result implied that the resistance of clubroot disease is controlled by a single dominant gene to the race 4 of P. brassicae in CR Saerona. To develop DNA markers linked to clubroot resistance genes, 185 plants of CR Saerona among $F_2$ populations were used. A total of 300 arbitrary decamer was applied to $F_2$ population using BSARAPD(Bulked segregant analysis-Randomly amplified polymorphic DNA). One RAPD marker linked to clubroot resistance gene in CR Saerona($OPJ_{1100}$) was identified. This marker was 3.1 cM in distance from resistance gene in $F_2$ population. This marker may be useful for a marker-assisted selection(MAS) and gene pyramiding of the clubroot disease resistant gene in Chinese cabbage breeding programs.
답지력증진시험 : 객토(客土)가 답지력(沓地力)에 미치는 영향 Effect of field soil application on the fertility of rice paddy
조성진,육창수 한국농화학회 1967 Applied Biological Chemistry (Appl Biol Chem) Vol.8 No.1
1. This experiment was carried out, as part of virgin soil application project conducted by Chung Buk Province in 1966, to determine the effect of application of field red soil to rice paddy for enhancing the fertility of sterile paddy soil. 2. This applied field soil from the mountain near Chung Buk College contains 1.31% of active iron. 3. The plots of 15.000 ㎏, 22,500 ㎏, 30,000 ㎏, and 7,500 ㎏ had increased yields of 11%, 9%, 8%, and 6% in weight of unhulled rice, respectively. 4. Although any significance was not recognized among the levels of treatment at 5% level in F test, the plot of 15,000 ㎏ was highly significant, and those of 22,500 ㎏ and 30,000 ㎏ significant where as that of 7,500 ㎏ was non-significant compared with the control. 5. It seems that the most effective amount of application is 15,000 ㎏/10 a in this experiment. 6. The infection rate of rice blast and neck rot decreased with the increased amount of application.
New method of predicting dry weight using bioelectrical impedance analysis in haemodialysis patients
LEE, SEOUNG WOO,KIM, DEOK YOUNG,LEE, SEUNG HEE,CHO, HYUNG CHAN,KWON, SU HYUN,SONG, JOON HO,KIM, MOON JAE Blackwell Publishing Asia 2009 Nephrology Vol.14 No.8
<P>SUMMARY:</P><P>Aim: </P><P>There were significant differences in the slopes of the ultrafiltration (UF) amount removed during haemodialysis (HD) sessions <I>versus</I> the percentage change in the extracellular fluid/total body water ratio for the right lower extremity (ECF/TBW<SUB>right leg</SUB>) plot in normohydrated (NH) and overhydrated states. The purpose of this study was to develop and validate a method for predicting dry weight (DW) using these results.</P><P>Methods: </P><P>It was hypothesized that for patients to become NH, the slope of the UF amount <I>versus</I> the percentage changes in ECF/TBW<SUB>right leg</SUB> plot should be same as that of NH patients and a method for predicting DW was developed. To validate the accuracy of this method, the ECF/TBW<SUB>right leg</SUB> was measured by eight-point tactile-electrode bioelectrical impedance analysis before and after HD in 17 newly enrolled NH patients. Using the current DW (cDW) of subjects as a reference, we compared the accuracies of pDW1 (our devised method) and pDW2 (the normovolaemia/hypervolaemia slope method).</P><P>Results: </P><P>The mean cDW, pDW1 and pDW2 values were 56.8 ± 7.9, 56.4 ± 7.7 and 56.3 ± 8.0 kg, respectively. No significant differences existed between cDW, pDW1 and pDW2. pDW1 had a lower root mean square error than pDW2 (1.12 <I>vs</I> 1.69). On the Bland–Altman plot, differences between pDW1 and cDW were closer to zero than between pDW2 and cDW.</P><P>Conclusion: </P><P>A new method was developed of predicting the DW using the relationship between the UF amount and the percentage change in the ECF/TBW ratio of the lower extremities after HD. The devised method appears to be as accurate as the normovolaemia/hypervolaemia slope method.</P>