• Title/Summary/Keyword: task matrix analysis

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Character Writing Using Multi-Fingered Hands : Grasp Modeling and Compliance Analysis (다지 손을 이용한 문자 쓰기 : 파지 모델링 및 컴플라이언스 특성 해석)

  • Kim, Byoung-Ho;Yeo, Hee-Joo
    • Journal of Institute of Control, Robotics and Systems
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    • v.7 no.11
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    • pp.927-932
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    • 2001
  • When people write a character with a pen stably, proper compliance planning is necessary. In this paper, after investigating the property of character writing task, we propose a fundamental grasp model for character writing and also analyze compliance characteristics for effective character writing using multi-fingered hands. For this, the general stiffness relation of multi-fingered hand is firstly described. Next, we investigate the grasp configurations for grasping a pen and then, we analyze the conditions of the specified stiffness matrix in the operational space to successfully and more effectively achieve the given character writing task. Through the analysis, an effective grasp modeling for successful character writing is shown. And also, we conclude that the operational compliance characteristics should be properly planned for character writing, stably and precisely.

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Compliance Analysis for Effective Peg-In-Hole Task (팩인홀 작업을 효율적으로 수행하기 위한 컴플라이언스 해석)

  • Kim, Byeong-Ho;Lee, Byeong-Ju;Seo, Il-Hong;O, Sang-Rok
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.9
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    • pp.181-188
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    • 2000
  • This paper deals with an analysis of the compliance characteristic for effective peg-in-hole task using robot hand without inter-finger coupling. We first observe the fact that some of coupling stiffness elements cannot be planned arbitrary. next we classify the task of inserting a peg-in-a-hole into two contact styles between the peg and the hole. Then we analyze the conditions of the specified stiffness matrix in the operational space to successfully and more effectively achieve the give peg-in-hole task for each case. It is concluded that the location of compliance center on the peg and the coupling stiffness element existing between the translational and the rotational direction play important roles for successful peg-in-hole task. Simulation results are included to verify the feasibility of the analytic results.

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An AHP Approach to Select the Task Related Technique for Work Efficiency Improvement in Shipbuilding Enterprise (AHP에 의한 조선기업의 작업능률향상을 위한 과업관련기법의 선택)

  • Kim, Tae-Soo;Lee, Kang-Woo
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2006.11a
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    • pp.31-37
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    • 2006
  • The objective of this research is to select the most effective technique from task related techniques(motion & time study, job redesign, physical environment improvement) for improving work efficiency in shipbuilding enterprise. This study consists of several principal steps. The first step is to design critical criteria in evaluating work efficiency in shipbuilding enterprises. The second step is to develop sub-criteria of the critical criteria. The third step is to develop a four level AHP(Analytic Hierarchy Process)structure using the critical criteria, sub-criteria and techniques from task related techniques. The fourth step is to develop the pairwise comparison matrix by each level of AHP structure, which was based on survey data collected at the H heavy industry. And the last step is to select the most effective technique from task related techniques using AHP analysis. The result of AHP analysis has shown clear difference in priority among task related techniques in terms of work efficiency of the shipbuilding enterprise: The reduction of normal time has more importance than the reduction of allowance time, motion & time study techniques are most important for the reduction of normal time, physical environment improvement is most important for the reduction of allowance time as well.

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An AHP Approach to Select the Task Related Technique for Work Efficiency Improvement in Shipbuilding Enterprise (AHP에 의한 조선기업의 작업능률향상을 위한 과업관련기법의 선택)

  • Kim, Tae-Soo;Lee, Kang-Woo
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.30 no.2
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    • pp.67-74
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    • 2007
  • The objective of this research is to select the most effective technique among task related techniques(motion & time study, job redesign, physical environment improvement) for improving work efficiency in shipbuilding enterprise. This study consists of several principal steps. The first step is to design critical criteria in evaluating work efficiency in ship-building enterprises. The second step is to develop sub-criteria of the critical criteria. The third step is to develop a four level AHP(Analytic Hierarchy Process) structure using the critical criteria, sub-criteria and techniques among task related techniques. The fourth step is to develop the pairwise comparison matrix at each level of AHP structure, which was based on survey data collected at the H heavy industry. And the last step is to select the most effective technique among task related techniques using AHP analysis. The result of AHP analysis has shown clear difference in priority among task related techniques in terms of work efficiency of the shipbuilding enterprise: The reduction of normal time is more important than the reduction of allowance time in improving of the work efficiency. Motion & time study is the most important technique for the reduction of normal time, and physical environment improvement is the most important technique for the reduction of allowance time as well.

Orthogonal Nonnegative Matrix Factorization: Multiplicative Updates on Stiefel Manifolds (Stiefel 다양체에서 곱셈의 업데이트를 이용한 비음수 행렬의 직교 분해)

  • Yoo, Ji-Ho;Choi, Seung-Jin
    • Journal of KIISE:Software and Applications
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    • v.36 no.5
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    • pp.347-352
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    • 2009
  • Nonnegative matrix factorization (NMF) is a popular method for multivariate analysis of nonnegative data, the goal of which is decompose a data matrix into a product of two factor matrices with all entries in factor matrices restricted to be nonnegative. NMF was shown to be useful in a task of clustering (especially document clustering). In this paper we present an algorithm for orthogonal nonnegative matrix factorization, where an orthogonality constraint is imposed on the nonnegative decomposition of a term-document matrix. We develop multiplicative updates directly from true gradient on Stiefel manifold, whereas existing algorithms consider additive orthogonality constraints. Experiments on several different document data sets show our orthogonal NMF algorithms perform better in a task of clustering, compared to the standard NMF and an existing orthogonal NMF.

A Discretization Algorithm for Bi-Matrix Game Approach to Power Market Analysis (전력시장 해석을 위한 Bi-matrix 게임의 이산화 알고리즘)

  • 이광호
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.1
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    • pp.62-67
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    • 2003
  • An important aspect of the study of power system markets involves the assessment of strategic behavior of participants for maximizing their profits. In models of imperfect competition of a deregulated electricity system, the key task is to find the Nash equilibrium. In this paper, the bimatrix approach for finding Nash equilibria in electricity markets is investigated. This approach determines pure and mixed equilibria using the complementarity pivot algorithim. The mixed equilibrium in the matrix approach has the equal number of non-zero property. This property makes it difficult to reproduce a smooth continuous distribution for the mixed equilibrium. This paper proposes an algorithm for adjusting the quantization value of discretization to reconstruct a continuous distribution from a discrete one.

Improvement of the Reliability Graph with General Gates to Analyze the Reliability of Dynamic Systems That Have Various Operation Modes

  • Shin, Seung Ki;No, Young Gyu;Seong, Poong Hyun
    • Nuclear Engineering and Technology
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    • v.48 no.2
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    • pp.386-403
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    • 2016
  • The safety of nuclear power plants is analyzed by a probabilistic risk assessment, and the fault tree analysis is the most widely used method for a risk assessment with the event tree analysis. One of the well-known disadvantages of the fault tree is that drawing a fault tree for a complex system is a very cumbersome task. Thus, several graphical modeling methods have been proposed for the convenient and intuitive modeling of complex systems. In this paper, the reliability graph with general gates (RGGG) method, one of the intuitive graphical modeling methods based on Bayesian networks, is improved for the reliability analyses of dynamic systems that have various operation modes with time. A reliability matrix is proposed and it is explained how to utilize the reliability matrix in the RGGG for various cases of operation mode changes. The proposed RGGG with a reliability matrix provides a convenient and intuitive modeling of various operation modes of complex systems, and can also be utilized with dynamic nodes that analyze the failure sequences of subcomponents. The combinatorial use of a reliability matrix with dynamic nodes is illustrated through an application to a shutdown cooling system in a nuclear power plant.

Classification of General Sound with Non-negativity Constraints (비음수 제약을 통한 일반 소리 분류)

  • 조용춘;최승진;방승양
    • Journal of KIISE:Software and Applications
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    • v.31 no.10
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    • pp.1412-1417
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    • 2004
  • Sparse coding or independent component analysis (ICA) which is a holistic representation, was successfully applied to elucidate early auditor${\gamma}$ processing and to the task of sound classification. In contrast, parts-based representation is an alternative way o) understanding object recognition in brain. In this thesis we employ the non-negative matrix factorization (NMF) which learns parts-based representation in the task of sound classification. Methods of feature extraction from the spectro-temporal sounds using the NMF in the absence or presence of noise, are explained. Experimental results show that NMF-based features improve the performance of sound classification over ICA-based features.

The Study of Educational Program Development for Self-Marketing based on Job Analysis

  • Ahn, Sang Joon
    • Journal of the Korea Society of Computer and Information
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    • v.24 no.9
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    • pp.135-142
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    • 2019
  • Given the ability and skills required by modern people, marketing can be divided into knowledge-related skill such as marketing plans, market segmentation, and marketing mix management and supportive skill such as communication, inter-organizational management, creativity, and decision making. Knowledge related skills can be nurtured in existing marketing classes, but it is recognized that special educational programs such as self marketing are needed to develop and train supportive skills regardless of education levels or major education. This paper is aimed to design for marketing educational program for the self marketing. In this study, a DACUM method job analysis to extract contents by specialists such as model setting of task and job, job statement, job analysis, education course development, and so on. In the first place, this report presents job analysis model by procedures for developing selection criteria of examination questions of the self marketing qualification. The first step is preparation for job analysis, the second step: the establishment of job models, the third step : the job specification and task analysis, the fourth step: the review of job model, the fifth step: the establishment of subjects for examination matrix table for making questions.

DACUM Job Analysis for Surveying and GIS Engineer Education (측량 및 GIS 기술자 양성을 위한 DACUM 직무분석)

  • 박희주;김욱남;서철수
    • Proceedings of the Korea Contents Association Conference
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    • 2004.05a
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    • pp.176-187
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    • 2004
  • Demand of industry site should be accepted for effective job education of college. This study was conducted to analyze the demand of industry and the need of education, and to reflect them in the customer demand education of Department of Cadastral Information, Shingu College. DACUM job analysis method was adapted to conduct this study, and pannelists who work in surveying and GIS industry had been invited to analyze systemically the job of related industrial site. As results, the job-task model and Knowlege Skill Tool matrix was derived by analysis of job and task of industrial site. This job analysis data can be used to develop the curriculum or the program of surveying and GIS education, or to revise existing curriculum.

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