비디오테이프 KR이 테니스 첫 서비스 수행과 자기효능감에 미치는 영향

박기용,박영명,박병규,백인준 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to examine the effect of Video Tape KR on First Serve Performance and self-efficacy. The 16 subjects were intentionally assigned to 2 different conditions groups : 8 involved in Video Tape KR A group(experimental group 1), and 8 involved in control group. Each experimental group participated in Video Tape KR A group and B group for 5 weeks. The experimental task was First Serve Performance. The experimental instruments were Video Tape KR A, and self-efficacy questionnaires. The Video Tape KR suitable for tennis was comprised of general instructions, t-test was conducted to test the data. The conclusions are as followings: 1. The Video Tape KR has an affirmative influence upon First Serve performance. 2. The Video Tape KR has an influence upon self-efficacy. 3. The Video Tape KR has an influence upon First Serve performance and self-efficacy.

임상교정 교육용 멀티미디어 데이터베이스 웹서버 구축에 관한 연구

박재우,이종기,장영일,남동석,김명기,양원식,김태우,백승학 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.2

본 연구는 인터넷상의 가상공간에 다양한 자료로 구성된 환자 증례를 통해, 교정을 배우고자 하는 임상의나 학생들의 교육에 필요한 멀티미디어 데이터베이스를 구축하기 위한 것이다. 이러한 시스템을 구현하기 위해서는 이미지 자료의 처리, computer network를 통한 빠른 정보처리 기능, 진단 분석법의 개발, 데이터베이스의 구축 기술, 데이터베이스와 인터넷과의 연계, 증례를 통한 교육방법론과 같은 기술적 문제점들이 있다. 진단과 치료계획을 위한 분석은 모델 분석과 두부방사선 사진분석으로 나누어 제공하였다. 모델분석법은 arch length discrepancy와 Bolton tooth ratio를 환자 정보란에 제공하였다. 두부방사선 사진분석은 초진란에 제공하였다. Cephalometric analysis ver 2.0과 Power Ceph pro 3.3.5를 이용하여 Tweed, Steiner, Jarabak분석법 등을 제공하였으나, 본문에서는 주로 Kim's analysis와 몇 가지 계측치를 추가하여 설명하였고, 나머지는 tracing란에서 제시하였다. 또한 치료 종료 후나 보정란에서 치료 전, 후의 두부방사선 사진을 중첩해서 보여줌으로써 치료에 의한 효과를 직접 볼 수 있도록 하였다. The Objective of this research was to construct the multimedia database system that was necessary for the education of the practitioners and the students. To establish this system, there were technical problems as follows : 1) The processing of the images, 2) The rapid processing of the information with the computer network, 3) The development of diagnosis tools, 4) The technique to establish the database system, 5) The link between the database system and the internet, and 6) The method to educate through many cases. The analysis for diagnosis and treatment planning were provided as two parts : model analysis and cephalometric analysis. As a model analysis, arch length discrepancy and Bolton tooth ratio were provided for the part of patient information. Cephalometric analyses were provided in the part of initial diagnosis. The Cephalometric analysis ver 2.0 and the PowerCeph pro 3.3.5 were used to show Tweed, Steiner and Jarabak analysis. In the main part, Kim's analysis and some measurements were added. In the post-treatment or retention part, we show the superimposition of the cephalometrics with which you can find the effectiveness of the various orthodontic treatment. The address of this home page is "http://damis.snu.ac.kr/orthodontics"

Numerical Analysis Method for Multi-Scale Coupled Problem of Dielectric Barrier Discharge With Moving Electrode

Myung Ki Baek,Kang Hyouk Lee,Il Han Park IEEE 2015 IEEE transactions on magnetics Vol.51 No.3

<P>A multi-scale problem with respect to time scale occurs in dielectric barrier discharge with moving electrode. The discharge system is modeled with the coupled equation, which consists of a discharge equation for space charge density variation and Poisson's equation for electric field distribution. The analysis model consists of two parallel cylinder electrodes covered with dielectric material. Space charges generated during discharge are accumulated on dielectric barrier, and it affects electric field distribution and the following discharges. In the proposed method, the multi-scale analysis is divided into several steps considering the movement of the surface charge accumulated on the dielectric barrier. The surface potential of electrode is measured and compared with the calculated one. The analysis results show good agreement with the measured surface potential.</P>

Numerical Analysis and Experiment for Microparticle Collector Using Dielectrophoretic Force

Myung Ki Baek,Gwang Jun Yu,Il Han Park IEEE 2014 IEEE transactions on magnetics Vol.50 No.2

<P>The motion of dielectric microparticles in the proposed particle collector is modeled and analyzed with coupled equations of electromagnetics, fluidics, and particle dynamics. The dielectrophoretic and drag forces on microparticles are obtained using distributions of electric field and fluid velocity field. The two fields are numerically calculated by the FEM. All the forces on the particles are employed for Newton's dynamic equation for particle motion analysis. To evaluate the proposed new method, an experimental system for the particle collector is designed and built to measure the trapping performance, which is estimated using standard microparticles and a particle counter under a given air flow.</P>

Magnetic Separation for Contaminants in Wastewater Using Magnetic Micro Bead

Myung Ki Baek,Tan Il Sung,Eun Su Cho,Kyu Cheol Namkung,Dong Jin Bae,Il Han Park IEEE 2012 IEEE transactions on magnetics Vol.48 No.11

<P>In this paper, a new physical method for wastewater treatment that uses magnetic micro beads and a magnetic field is proposed. An experimental jar test for the separation of micro particle is carried out to show its feasibility. In the stirring process, contaminants of wastewater can adhere to magnetic beads, and then magnetic floc can be formed around the beads. This magnetic floc can be separated from the wastewater by an external magnetic field. A separation system is also designed, and its performance is numerically analyzed using the electromagnetic finite element method coupled with the fluid equation and the dynamic equation of particles wherein the driving force includes the magnetophoretic force, gravity, buoyancy, and drag force.</P>

Numerical Analysis for Magnetophoretic Separation of Blood Cells in Fluid and Magnetic Field

Myung Ki Baek,Hong Soon Choi,Ki Sik Lee,Il Han Park IEEE 2012 IEEE transactions on applied superconductivity Vol.22 No.3

<P>In this paper, the characteristics of blood cell motion are analysed by solving a coupled electromagnetic, fluid and particle dynamics problem. The forces acting on blood cells are obtained from magnetic field and fluid field distributions, both of which are numerically calculated by the finite element method. These force consist of the magnetophoretic force, drag force, buoyancy and gravity, these are driving terms in Newton's equation for the particle motion. We propose a numerical analysis procedure to solve the coupled problem, and a micro cell separation device without a micro fabricated structure is designed. The dynamic characteristics of the cell motion are simulated. The simulation results show the proposed numerical scheme to analyse the micro particle dynamics and also show the usefulness of the designed device.</P>

Experiment and Analysis for Effect of Floating Conductor on Electric Discharge Characteristic

Myung Ki Baek,Young Ki Chung,Il Han Park IEEE 2013 IEEE transactions on magnetics Vol.49 No.5

<P>In this paper, we present a numerical analysis method for analyzing the discharge characteristic with the presence of a floating conductor. Space charges generated during the discharge process can accumulate on the surface of the floating conductor, or be emitted from its surface. An intensification of the electric field around the floating conductor is affected by those space species. Therefore, it is important to calculate the space-charge distributions considering the surface charge on a floating conductor because the discharge occurs at the floating conductor, which is placed around the cathode. An axial symmetry finite-element model is used to analyze this floating conductor discharge system, and Poisson's equation is coupled with the hydrodynamic drift-diffusion equation to calculate space charge distributions. Fowler-Nordheim electron emission is employed for the boundary condition at conductor surfaces. The analysis results show the variation of the electric field due to the space charges and the surface charge density on the floating conductor. Experiments using corona generators are carried out, and the current data obtained show the space charge generated by the presence of a floating conductor.</P>

중소/중견 기업 지원을 위한 공정혁신 시뮬레이션 센터

백명기(Myung Ki Baek) 대한전기학회 2020 전기의 세계 Vol.69 No.10

4차 산업혁명에 기술적 우위를 선점하기 위해서는 중소중견 기업의 역할이 매우 중요하다. 그런데 국내 중소중견 제조 기업은 아직 까지도 단순 조립 생산 방식 제조업의 특성에서 벗어나지 못하고 있다. 세계 경쟁력을 갖기 위해서는 융복합 시뮬레이션 기술 적용을 통한 문제 해결과 신제품 개발 능력을 키워야 한다. The roll of small and medium-sized enterprises is important to lead engineering technology in Fourth Industrial Revolution. However small and medium-sized enterprises in Korea have been maintaining the process of manufacturing and assembling without simulation process. To enhance small and medium-seized enterprise’s competitiveness in the world market, multi-physical simulation technology between industries is applied to those enterprises.

실거래가 신고제도에 대한 인식과 파급효과에 관한 연구

백명기(Baek, Myung Ki),서진형(Seo, Jin Hyeong) 대한부동산학회 2009 大韓不動産學會誌 Vol.27 No.1

실거래가 신고제도의 정착을 위하여 실거래가 신고제도에 대한 신고당사자인 중개업자의 인식과 이 제도의 파급효과에 대한 실증분석을 통하여 제도의 개선방향을 모색하고 나아가 부동산정책을 수립하는데 기초자료를 제공하고자 한다. 실거래가 신고제도에 대한 실증분석을 한 결과는 다음과 같다. 먼저 실거래가 신고제도에 대한 행태를 분석한 결과는 의무이행에 따라 비용을 청구할 수 있도록 제도적 장치를 마련하는 것이 제도의 정착에 도움이 될 것이다. 그리고 지연신고가 발생하지 않도록 교육과 홍보를 강화하고, 허위계약서를 작성하지 않도록 조세저항을 줄이는 방향으로 조세제도를 개선하여야 할 것이다. 한편, 실거래가 신고제도에 대한 파급효과를 분석한 결과이다. 첫째, 실거래가의 파악을 통하여 부동산정책을 수립함으로서 그 효과나 신뢰성을 제고하는데 도움이 될 것이다. 둘째, 부동산거래에도 영향을 미쳐 부동산시장이 단기 거래보다는 장기 투자 위주로 투자 패턴이 바뀌게 될 것으로 예상된다. 실제 거래금액이 투명하게 노출됨에 따라 장기보유 등을 통하여 양도 세 부담을 줄이는 투자 패턴이 더욱 선호될 것이다. 셋째, 취ㆍ등록세나 양도세부담이 늘어 거래가 위축되어 경기침체기조가 장기화ㆍ고착화될 가능성도 있다. 따라서 거래세의 비율을 낮추고 보유세의 비율을 높이는 방향으로 개선하여야 할 것이다. To ensure that the system of reporting actual transaction price is widely practiced, the present study seeks to improve the system based on analysis of relevant evidence relating to the recognition of the system on the part of the agent who files the report and to the ripple effect of the system. Moreover, the purpose of the study is to provide basic resources required to formulate real estate policy. The following provides the result of evidence based analysis of the system of reporting actual transaction price. First, the result of examining the behavioral pattern surrounding the system shows that it would be helpful for consolidating the system if an administrative apparatus was set up which would allow people to request a claim for cost according to fulfillment of duty. Also, there is a need to strengthen education and PR activity in order to prevent delayed reporting, and the system of taxation should be improved in a way that reduces resistance to taxation in order to ensure that people do not provide false contract forms. Furthermore, the following are the results of an analysis of the ripple effect of the system of reporting actual transaction price. First, formulating real estate policy by considering the actual transaction price will help enhance its effectiveness and reliability. Second, it is anticipated that there will be a shift from short term to long term pattern of investment, because the system will exert influence on real estate transaction. People will prefer a pattern of investment that reduces the burden of capital gains tax via long term retention, as the actual transaction price becomes transparent. Third, it is possible that economic recession will become entrenched and continue for an extended length of time due to reduced transaction, as the burden of acquisition tax, registration tax, and capital gains tax increases. As such, improvement should be made in a way that lowers the rate of transfer tax and raises the rate of property tax.

시뮬레이션 기술 적용을 통한 중소중견기업 성장 사례

백명기(Baek, Myung-Ki) 대한전기학회 2023 전기의 세계 Vol.72 No.8

4차 산업혁명 시대에 기존 제조업 방식을 고수하는 중소중견기업이 변화에 적응하기란 쉬운 일이 아니다. 공학 시뮬레이션 적용이 기존 제조 방식의 중소중견기업에 어떤 영향을 미치는지 사례를 통해 살펴볼 수 있다. In industry 4.0, it is hard for SMEs(small and medium-sized enterprises) to innovate on the present condition. Engeering simulation can solve the design problem that SMEs are faced with, and can reduce the time from design to production. SMEs need support to access Industry 4.0, and the key is Simulation center.