• Title/Summary/Keyword: Realistic Problem

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Enhanced Augmented Reality with Realistic Shadows of Graphic Generated Objects (비디오 영상에 가상물체의 그림자 삽입을 통한 향상된 AR 구현)

  • 김태원;홍기상
    • Proceedings of the IEEK Conference
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    • 2000.09a
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    • pp.619-622
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    • 2000
  • In this paper, we propose a method for generating graphic objects having realistic shadows inserted into video sequence for the enhanced augmented reality. Our purpose is to extend the work of [1], which is applicable to the case of a static camera, to video sequence. However, in case of video, there are a few challenging problems, including the camera calibration problem over video sequence, false shadows occurring when the video camera moves and so on. We solve these problems using the convenient calibration technique of [2] and the information from video sequence . We present the experimental results on real video sequences.

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Facility Location Planning with Realistic Operation Times in Supply Chain (공급사슬에서 실제 시설물 운영시간을 고려한 시설배치계획에 관한 연구)

  • Lee Sang Heon;Kim Sook Han
    • Journal of the Korean Operations Research and Management Science Society
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    • v.30 no.2
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    • pp.143-156
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    • 2005
  • Facility location planning (FLP) problem is the strategic level planning in supply chain. The FLP is significantly affected by the operation time of each facility. In most of the FLP researches, operation time of facility has been treated as a fixed value. However, the operation time is not a static factor in real situations and the fixed operation time may lead unrealistic FLP. In this paper, a mixed integer programming (MIP) model is proposed for solving the 3-stage FLP problem and operation times are adjusted by the results from the simulation model and an iterative approach combining the analytic model and simulation model is proposed to obtain more realistic operation plans for FLP problems.

A STUDY ON THE PSYCHOTHERAPEUTIC PROCESS OBSERVED IN AN OBSESSIVE COMPULSIVE ADOLESCENT (강박장애 청소년에서 관찰된 정신치료 과정에 관한 연구)

  • Kim, Hak-Riong
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.4 no.1
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    • pp.164-172
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    • 1993
  • By observing the psychotherapy process expressed by an adolescent with obssessive compulsive disorder, the author suggests that the main problem of OCD is not merely a product of an unconscious process as traditionally thought, but a learned problem solving process as a method surviving the more realistic conflicts, and therefore the treatment should be directed to more or less conscious and realistic issues and conflicts, family therapy should be offered too.

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New Fictitious Play Procedure For Solving Blotto Games (Blotto 게임을 풀기위한 새로운 근사해법 절차)

  • Lee, Jea-Yeong;Lee, Moon-Gul
    • Journal of the military operations research society of Korea
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    • v.31 no.1
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    • pp.107-121
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    • 2005
  • In this study, a new fictitious play (FP) procedure is presented to solve two-person zero-sum (TPZS) Blotto games. The FP solution procedure solves TPZS games by assuming that the two players take turns selecting optimal responses to the opponent's strategy observed so far. It is known that FP converges to an optimal solution, and it may be the only realistic approach to solve large games. The algorithm uses dynamic programming (DP) to solve FP subproblems. Efficiency is obtained by limiting the growth of the DP state space. Blotto games are frequently used to solve simple missile defense problems. While it may be unlikely that the models presented in this paper can be used directly to solve realistic offense and defense problems, it is hoped that they will provide insight into the basic structure of optimal and near-optimal solutions to these important, large games, and provide a foundation for solution of more realistic, and more complex, problem

Analysis and Design of Whole-Head Magnetic Brain Stimulators: A Simulation Study

  • Lee, Chany;Im, Chang-Hwan;Jung, Hyun-Kyo
    • International Journal of Control, Automation, and Systems
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    • v.5 no.3
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    • pp.337-342
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    • 2007
  • This paper proposes a helmet-type whole-head brain stimulator system considering a realistic head geometry. For more accurate design and computer simulations, a realistic volume conductor model was adopted and the current evoked on human cerebral cortex was analyzed using the boundary element method (BEM). To obtain a more focalized evoked current around the target points, various coil configurations were tested and an average targeting error of about 10 mm was obtained.

A Genetic Algorithm for Searching Shortest Path in Public Transportation Network (대중교통망에서의 최단경로 탐색을 위한 유전자 알고리즘)

  • 장인성;박승헌
    • Korean Management Science Review
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    • v.18 no.1
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    • pp.105-118
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    • 2001
  • The common shortest path problem is to find the shortest route between two specified nodes in a transportation network with only one traffic mode. The public transportation network with multiple traffic mode is a more realistic representation of the transportation system in the real world, but it is difficult for the conventional shortest path algorithms to deal with. The genetic algorithm (GA) is applied to solve this problem. The objective function is to minimize the sum of total service time and total transfer time. The individual description, the coding rule and the genetic operators are proposed for this problem.

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A New Input Estimation Algorithm for Target Tracking Problem

  • Lee, Hungu;Tahk, Min-Jea
    • 제어로봇시스템학회:학술대회논문집
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    • 1998.10a
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    • pp.323-328
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    • 1998
  • In this paper, a new input estimation algorithm is proposed for target tracking problem. The unknown target maneuver is approximated by a linear combination of independent time functions and the coefficients are estimated by using a weighted least-squares estimation technique. The proposed algorithm is verified by computer simulation of a realistic two-dimensional tracking problem. The proposed algorithm provides significant improvements in estimation performance over the conventional input estimation techniques based on the constant-input assumption.

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The Relationship between Posing and Solving Arithmetic Word Problems among Chinese Elementary School Children

  • Chen, Limin;Van Dooren, Wim;Chen, Qi;Verschaffel, Lieven
    • Research in Mathematical Education
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    • v.11 no.1
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    • pp.1-31
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    • 2007
  • Recent research has documented that there is a close relationship between problem posing and problem solving in arithmetic. However, most studies investigated the relationship between problem posing and problem solving only by means of standard problem situations. In order to overcome that shortcoming, a pilot study with Chinese fourth-graders was done to investigate this relationship using a non-standard, realistic problem situation. The results revealed a significant positive relationship between students' problem posing and solving abilities. Based on that pilot study, a more extensive and systematic ascertaining study was carried out to confirm the observed relationship between problem posing and problem solving among Chinese elementary school children. Results confirmed that there was indeed a close relationship between both skills.

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Optimization Methodology Integrated Data Mining and Statistical Method (데이터 마이닝과 통계적 기법을 통합한 최적화 기법)

  • Jung, Hey-Jin;Song, Suh-Ill
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2006.11a
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    • pp.205-210
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    • 2006
  • Nowaday manufacture technology and manufacture environment are changing rapidly. By development of computer and enlargement of technique, most of manufacture field are computerized. It is measured automatically do much quality characteristics thereby and great many data happen in a day. corporations is important if have gotten fast information that are useful from wide data to go first in international competition according to these change. Statistical process control(SPC) techniques are used as a problem solution tool at manufacturing process until present. However, this statistical methods is not applied more extensively because have much restrictions in realistic problem. In this paper, wish to develop more realistic and scientific new statistical design techniques doing to integrate data mining(DM) and statistical methods by the alternative to cope these problem. First step selects significant factor using DM techniques from datas of manufacturing process including much factors and second step wish to find optimum of process after get the estimated response function through response surf ace methodology(RSM) that is statistical techniques.

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The Analysis of Mathematical Abilities and Mathematization in the Mathematising Experience Instruction for Elementary Students (수학화 경험 수업에서 나타난 초등학생의 수학적 능력 및 수학화 분석)

  • Kim Yoon-Jin;Kim Min-Kyeong
    • The Mathematical Education
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    • v.45 no.3 s.114
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    • pp.345-365
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    • 2006
  • This study, to effectively teach the concepts, principles and problem solving ability of the 2nd graders' learning of numbers and operations, offers realistic problem situation and focuses on the learning based on 'mathematization', one of the most important principles of RME (Realistic Mathematics Education) which is the mathematics education trend of Netherlands influenced by Freudenthal's theory. The instruction is applied to forty-one students of the 2nd grader for six weeks in twelve series in an elementary school, located in Seoul. To investigate the effects of the mathematising experience instruction for improving mathematical abilities, the group takes tests before and after the instruction. Also the qualitative analysis on the students' mathematising aspects through students' output at the instruction process is taken into account to evaluate the instruction's effects. The result shows that the mathematising experience instruction for improving mathematical abilities is proved to improve students' understanding of mathematical concepts and principles and their problem solving ability in learning numbers and operations after carrying out this instruction. Also the result indicates that students' mathematising aspects are mostly horizontal and vertical mathematization.

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