• Title, Summary, Keyword: Convergence field

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Industrial Needs Investigation on Technological Convergence Education: Focused on the Field of Nano-tech, Bio-tech, Robot, and Design (융합기술교육에 대한 산업체 수요조사 : 나노, 바이오, 로봇, 디자인 분야를 중심으로)

  • Jin, Sung-Hee
    • Journal of Engineering Education Research
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    • v.20 no.1
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    • pp.18-27
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    • 2017
  • This study aims to investigate industry needs for convergence education in the field of nano-technology, bio-technology, robot, and design. Firstly, the area of convergence technology in nano-tech, bio-tech, robot, and design fields was examined through the literature review and case study. The areas were validated by the experts review who consisted of four industry experts and four professors in the relevant fields. Second, a questionnaire was developed for investigating industry's needs on convergence education. The questionnaire consisted of three parts: 1) awareness of necessity for convergence education, 2) the needs for convergence new technology education from the perspective of industry, and 3) opinions on convergence education. The questionnaire was validated by three engineering education experts. Third, the survey was conducted in cooperation with the Sector Council of Industrial Resources. A total of 400 respondents responded to the questionnaires: 98 in the nano-technology field, 74 in the design field, 58 in the robotics field, and 170 in the bio-technology field. Fourth the industry needs for convergence education were analyzed and implications were suggested. The results of this study are expected to provide a guideline for developing convergence education programs in higher education.

Vibration Adaptive Algorithm for Vision Systems (비전 시스템의 성능개선을 위한 진동 적응 방법)

  • Seo, Kap-Ho;Yun, Sung-Jo;Park, Jeong Woo;Park, Sungho;Kim, Dae-Hee;Sohn, Dong-Seop;Suh, Jin-Ho
    • Journal of The Korean Society of Manufacturing Technology Engineers
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    • v.25 no.6
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    • pp.486-491
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    • 2016
  • Disturbance/vibration reduction is critical in many applications using machine vision. The off-focusing or blurring error caused by vibration degrades the machine performance. In line with this, real-time disturbance estimation and avoidance are proposed in this study instead of going with a more familiar approach, such as the vibration absorber. The instantaneous motion caused by the disturbance is sensed by an attitude heading reference system module. A periodic vibration modeling is conducted to provide a better performance. The algorithm for vibration avoidance is described according to the vibration modeling. The vibration occurrence function is also proposed, and its parameters are determined using the genetic algorithm. The proposed algorithm is experimentally tested for its effectiveness in the vision inspection system.

Spin orbit torque detected by spin torque FMR in W/CoFeB bilayer

  • Kim, Changsoo;Moon, Kyoung-Woong;Chun, Byong Sun;Kim, Dongseok;Hwang, Chanyong
    • Journal of the Korean Magnetic Resonance Society
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    • v.23 no.2
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    • pp.46-50
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    • 2019
  • Spin orbit torque would be applied as the next generation of MRAM, so many researchers are interested in related field. To make a more efficient device, electric current should convert into spin current with high efficiency. Moreover, it becomes important to measure efficiency of spin orbit torque accurately. We measured spin torque FMR of W/CoFeB hetero structure system with direct current. The efficiencies of the damping like torque and field like torque were measured by using the linewidth and on-resonance field proportional to direct current. In addition, we analyzed that a quadratic shift of the on-response field was caused by the Joule heating.

Multi-modal Sensor System and Database for Human Detection and Activity Learning of Robot in Outdoor (실외에서 로봇의 인간 탐지 및 행위 학습을 위한 멀티모달센서 시스템 및 데이터베이스 구축)

  • Uhm, Taeyoung;Park, Jeong-Woo;Lee, Jong-Deuk;Bae, Gi-Deok;Choi, Young-Ho
    • Journal of Korea Multimedia Society
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    • v.21 no.12
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    • pp.1459-1466
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    • 2018
  • Robots which detect human and recognize action are important factors for human interaction, and many researches have been conducted. Recently, deep learning technology has developed and learning based robot's technology is a major research area. These studies require a database to learn and evaluate for intelligent human perception. In this paper, we propose a multi-modal sensor-based image database condition considering the security task by analyzing the image database to detect the person in the outdoor environment and to recognize the behavior during the running of the robot.

CONVERGENCE ANALYSIS ON GIBOU-MIN METHOD FOR THE SCALAR FIELD IN HODGE-HELMHOLTZ DECOMPOSITION

  • Min, Chohong;Yoon, Gangjoon
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • v.18 no.4
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    • pp.305-316
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    • 2014
  • The Hodge-Helmholtz decomposition splits a vector field into the unique sum of a divergence-free vector field (solenoidal part) and a gradient field (irrotational part). In a bounded domain, a boundary condition needs to be supplied to the decomposition. The decomposition with the non-penetration boundary condition is equivalent to solving the Poisson equation with the Neumann boundary condition. The Gibou-Min method is an application of the Poisson solver by Purvis and Burkhalter to the decomposition. Using the $L^2$-orthogonality between the error vector and the consistency, the convergence for approximating the divergence-free vector field was recently proved to be $O(h^{1.5})$ with step size h. In this work, we analyze the convergence of the irrotattional in the decomposition. To the end, we introduce a discrete version of the Poincare inequality, which leads to a proof of the O(h) convergence for the scalar variable of the gradient field in a domain with general intersection property.

A Case Study and Industry Demand Investigation on Technological Convergence Education Related to the 4th Industrial Revolution: Focused on Electronics, Software, and Automobile (4차 산업혁명 관련 융합기술교육에 대한 사례조사 및 산업체 수요조사: 전자, 소프트웨어, 자동차 중심의 융합교육 중심으로)

  • Jin, Sung-Hee
    • The Journal of the Korea Contents Association
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    • v.19 no.2
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    • pp.36-48
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    • 2019
  • The purpose of this study is to investigate case studies and industry needs for convergence education in the fields of electronics, software, and automobiles, which are the technical foundations of the Fourth Industrial Revolution. Through the literature review, the convergence education programs focusing on electronics, software, and automobile were derived. The areas were validated by the experts review who consisted of three industry experts and professors in the relevant fields. Domestic and foreign curriculum were investigated to understand the current state of technical convergence education in each field. Industry needs survey for technical convergence education was conducted in cooperation with the Sector Council of Industrial Resources. Research instruments consisted of three parts: needs for technical convergence education, needs for the specific convergence education in the field of electronics, software, and automobile, and opinions on convergence education. A total of 341 participants responded to the questionnaires: 132 in the electronic field, 100 in the software field, and 109 in the automobile field. The industry needs for convergence education were analyzed and implications were suggested. The results of this study are expected to provide a guideline for developing convergence education programs in higher education.

Fabrication and Driving of Active-Matrix Field Emission Display

  • Song, Yoon-Ho;Jeong, Jin-Woo;Kim, Dae-Jun;Kang, Jun-Tae;Cho, Kyoung-Ik
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.483-485
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    • 2007
  • The active-matrix field emission display (AMFED) was fabricated by integrating carbon nanotube emitters on a-Si thin-film transistors. Also, the tapered macro-gate was adopted for high immunity to a high anode voltage and strong electron beam focusing. The fabricated AMFED was successfully driven with a low voltage of below 15 V.

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Development of a Method for Improving the Electric Field Distribution in Patients Undergoing Tumor-Treating Fields Therapy

  • Sung, Jiwon;Seo, Jaehyeon;Jo, Yunhui;Yoon, Myonggeun;Hwang, Sang-Gu;Kim, Eun Ho
    • Journal of the Korean Physical Society
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    • v.73 no.10
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    • pp.1577-1583
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    • 2018
  • Tumor-treating fields therapy involves placing pads onto the patient's skin to create a low- intensity (1 - 3 V/cm), intermediate frequency (100 - 300 kHz), alternating electric field to treat cancerous tumors. This new treatment modality has been approved by the Food and Drug Administration in the USA to treat patients with both newly diagnosed and recurrent glioblastoma. To deliver the prescribed electric field intensity to the tumor while minimizing exposure of organs at risk, we developed an optimization method for the electric field distribution in the body and compared the electric field distribution in the body before and after application of this optimization algorithm. To determine the electric field distribution in the body before optimization, we applied the same electric potential to all pairs of electric pads located on opposite sides of models. We subsequently adjusted the intensity of the electric field to each pair of pads to optimize the electric field distribution in the body, resulting in the prescribed electric field intensity to the tumor while minimizing electric fields at organs at risk. A comparison of the electric field distribution within the body before and after optimization showed that application of the optimization algorithm delivered a therapeutically effective electric field to the tumor while minimizing the average and the maximum field strength applied to organs at risk. Use of this optimization algorithm when planning tumor-treating fields therapy should maintain or increase the intensity of the electric field applied to the tumor while minimizing the intensity of the electric field applied to organs at risk. This would enhance the effectiveness of tumor-treating fields therapy while reducing dangerous side effects.

Computational Flow Analysis and Drag Coefficient Research for Angle of Attack in Slocum Underwater Glider (Slocum 수중 글라이더의 유영 받음각에 대한 전산유동해석 및 항력계수 연구)

  • Park, Jeong-Woo;Lee, Jung-Woo;Choi, Young-Ho;Seo, Kap-Ho;Suh, Jin-Ho;Park, Jong-Jin
    • Journal of Ocean Engineering and Technology
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    • v.30 no.5
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    • pp.381-388
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    • 2016
  • An underwater glider makes it easy to explore a wide area with low power. However, an underwater glider is difficult to use for rapid collection, because the surfacing location cannot be predicted after a dive. Thus, simulation research is needed to predict the swimming path. In this paper, based on research, a linearized equation is derived for the drag coefficient at each angle of attack by assuming the boundary conditions for the Slocum underwater glider and performing a computational flow analysis.

A Weak Convergence of the Linear Random Field Generated by Associated Randomvariables ℤ2

  • Kim, Tae-Sung;Ko, Mi-Hwa;Kim, Hyun-Chull
    • Communications for Statistical Applications and Methods
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    • v.15 no.6
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    • pp.959-967
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    • 2008
  • In this paper we show the weak convergence of the linear random(multistochastic process) field generated by identically distributed 2-parameter array of associated random variables. Our result extends the result in Newman and Wright (1982) to the linear 2-parameter processes as well as the result in Kim and Ko (2003) to the 2-parameter case.