• 감성과학
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• 제5권2호
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• pp.63-72
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• 2002

In order to examine universal design, 1 have developed two analytical methodologies based on 3P(point) task analysis: structured task analysis and task matrix analysis. I also extracted nine universal design items, namely (1) adjustment, (2) redundancy, (3) specification and function transparency, (4) feedback and (5) error tolerance, (6) effective acquisition of information, (7) ease of understanding and judgment, (8) comfortable operation, and (9) continuity of information and operation. Structured task analysis is used to uncover problems in each of the tasks constituting a job for each functionally challenged condition of users, and solutions to the extracted problems are examined in terms of the above-mentioned nine universal design items. Task matrix analysis calls for the production of a table for each task in a job. In each table, nine items form the columns, and the horizontal rows list all disability types. Then, solutions are formulated for each cell formed by the intersecting columns and rows. Using these two analysis methods, 1 have conducted a verification experiment for the universal design of a public bus. The results of the research have enabled me to propose various ,solutions from a system-based perspective, instead of coming up with the superficial and isolated solutions which are normally produced when conventional analytical methods are used.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2002년도 춘계학술대회 논문집
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• pp.144-151
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• 2002

In order to examine universal desist I have developed two analytical methodologies based on 3P(point) task analysis: structured task analysis and task matrix analysis. I also extracted me universal design items, namely (1) adjustment (2) redundancy, (3) specification and function transparency, (4) feedback and (5) error tolerance, (6) effective acquisition of information, (7) ease of understanding and judgment (8) comfortable operation, and (9) continuity of information and operation. Structured task analysis is used to uncover problems in each of the tasks constituting a job for each functionally challenged condition of users, and solutions to the extracted problems are examined in terms of the above-mentioned nine universal design items. Task matrix analysis calls for the production of a table for each task in a job. In each table, nine items from the columns, and the horizontal rows list all disability types. Then, solutions are formulated for each cell formed by the intersecting columns and rows. Using these two analysis methods, T have conducted a verification experiment for the universal design of a public bus. The results of the research have enabled me to propose various solutions from a system-based perspective, instead of coming up with the superficial and isolated solutions which are normally produced when conventional analytical methods are used.

• 공학교육연구
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• 제16권1호
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• pp.35-44
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• 2013

The purpose of this study is to develop an examination system for an e-learning quality manager's certificate which is composed of subjects, criteria, method of examination. The task model of e-learning quality manager was modify and task/knowledge/skill matrix was developed to design the examination system through conferences of DACUM committee and an advisory committee. And a survey was carry out to analyze validity of contents of the examination system. The major findings were as the follow: First, occupational specification, job specification, task specification and task/knowledge/skill matrix were developed. Second, examination subjects were developed based on task/knowledge/skill matrix, which were "Basis of e-Learning and plan of service", "Expulsion and management of e-learning infrastructure", "Development of e-learning contents", "Operation and evaluation of e-learning service". Third, the criteria and methods of examination for an e-learning quality manager's certificate were developed, which is composed of test type, the sum of test items, test time and acceptable standards.

• 임상간호연구
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• 제23권2호
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• pp.189-201
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• 2017

Purpose: The aim of this study was to develop the nursing management core task and competency matrix for hospital unit managers. The perceived level of importance and performance of identified core competencies by unit managers were also investigated. Methods: Literature review and expert survey identified nursing management core task and competencies. Subsequently, the core task and competency matrix was developed and validated by expert panel. A survey of 196 nurse managers from 3 cities identified perceived importance and performance of core competiences. Results: Thirty-eight nursing management core task and thirty-seven nursing management core competencies were identified comprising five categories; Clinical practice knowledge, Evidence-based practice, Employee development, Strategic planning and Initiative. Based on the core task and competencies, the task and competency matrix for unit managers was developed. In the analysis of importance and performance of core competencies, the mean score of importance ($3.50{\pm}0.30$) was higher than the mean score of performance ($3.03{\pm}0.34$). Conclusion: The development of core task and competencies for unit managers in hospitals provides a guide for the development and evaluation of programs designed to increase competence of unit managers.

• Journal of Computing Science and Engineering
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• 제4권2호
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• pp.97-109
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• 2010

Nonnegative matrix factorization (NMF) is a popular method for multivariate analysis of nonnegative data, which is to decompose a data matrix into a product of two factor matrices with all entries restricted to be nonnegative. NMF was shown to be useful in a task of clustering (especially document clustering), but in some cases NMF produces the results inappropriate to the clustering problems. 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. The result of orthogonal NMF can be clearly interpreted for the clustering problems, and also the performance of clustering is usually better than that of the NMF. 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.

• 한국정밀공학회지
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• 제15권9호
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• pp.158-166
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• 1998

This paper presents a geometrical approach to the characteristic analysis of parallel mechanism with free joints intended for use as a planar task robot. Solution of the forward and inverse kinematic problems are described. Because the mechanism has only three degree-of-freedom output, constraint equations must be generated to describe the inter-relationship between actuated joints and free joints so as to describe the position and orientation of the moving platform. Once these constraints are incorporated into the kinematics model, a constrained Jacobian matrix is obtained. and it is used for the solution of the forward kinematic equations by Newton-Raphson technique. Another Jacobian matrix was derived to describe the interrelationship between actuated joints and moving platform. The stiffness, velocity transmission ratio, force transmission ratio and dexterity of the mechanism are then determined based on this another Jacobian matrix. The geometrical construction of the mechanism for the best performance was investigated using the characteristic analysis.

• 수산해양교육연구
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• 제19권2호
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• pp.219-228
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• 2007

The purpose of this study is to analyze the job and develops the educational training program of ship-fitter by using the DACUM (Developing A Curriculum) method. On the first stage, the authors have been defined the job and classified duties and tasks of ship-fitters. To fine what is the most efficient task for ship-fitter, we have been investigated the levels of importance, difficulty, frequency and entry in each task. A DACUM committee is composed of total 10 members, which are one facilitator, eight panel members, one recorder & coordinator to analyze the job of ship-fitter. Following is the result of this study. First, 5 duties and 28 tasks are analyzed. Second, 19 tasks that are essential in entry level of occupation containing 'drawing inspecting' are identified. Third, a job model of ship-fitter is constructed by the results of DACUM job analysis. Fourth, training program is developed. This program contains task/curriculum Matrix, task/Course Matrix, training Course Profile, training Road Map.

• 한국안전학회지
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• 제32권1호
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• pp.98-107
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• 2017

This study is aimed to design for qualification structure and develop the subjects for examination of the school safety manager qualifications. For the study purpose, job analysis and meetings with experts were performed for extract contents such as task range, criteria of examination, subjects of examination and examination methods, etc. The first step, duties and tasks of the school safety manager were figured out through revised job analysis data of the school safety manager developed before. On the second step, job model was established and developed job specification including importance, difficulty and frequency of each task. On the third step, task specification was developed, and Knowledge-Skill Matrix was the most important thing on examination were completed. The fourth step was the selection of examination subject using task-subject matrix and 6 subjects such as The Principles of Safety, Understanding of the School Safety Manual, Law Related on the School Safety, Introduction to Education, Understanding and Dealing with Type of the School Safety, Establishment of the School Safety Plan were derived from previous procedure. The fifth step was development of guidelines for design examination of each subject. The last step was development for skills education program.

• 한국건설관리학회논문집
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• 제20권1호
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• pp.105-113
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• 2019

하나의 건설 프로젝트에는 다양한 작업들이 상호의존적으로 진행되어 복잡한 프로세스를 이룬다. 한 작업에서 공사변동이 발생하면 추가적으로 다른 작업들도 영향을 받게 되며 신속하게 진행되는 건설현장 특성상 매번 변동에 대한 합의를 도출하기는 매우 어렵다. 이에 본 연구에서는 시공 과정에 발생하는 공사변동에 대한 근본원인을 파악하고 주요 공사변동요인에 해당하는 작업들에 대하여 인접행렬을 구축하여 네트워크 분석을 실시하였다. 이를 통해 작업들 간 관계론적 특성과 구조적 위치를 파악하였다. 이러한 시공 프로세스에서의 작업 네트워크 분석을 통해 복잡한 시공 과정에서의 작업흐름을 안정화 시키고자 하며 공정 계획의 신뢰성과 프로젝트 성과를 향상시키고자 한다.

• 로봇학회논문지
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• 제12권1호
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• pp.42-54
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• 2017

Using an inverse of the geometric Jacobian matrix is one of the most popular ways to control robot manipulators, because the Jacobian matrix contains the relationship between joint space velocities and operational space velocities. However, the control algorithm based on Jacobian matrix has algorithmic singularities: The robot manipulator becomes unstable when the Jacobian matrix loses rank. To solve this problem, various methods such as damped and filtered inverse have been proposed, but comparative studies to evaluate the performance of these algorithms are insufficient. Thus, this paper deals with a comparative analysis of six representative singularity avoidance algorithms: Damped Pseudo Inverse, Error Damped Pseudo Inverse, Scaled Jacobian Transpose, Selectively Damped Inverse, Filtered Inverse, and Task Transition Method. Especially, these algorithms are verified through computer simulations with a virtual model of a humanoid robot, THORMANG, in order to evaluate tracking error, computational time, and multiple task performance. With the experimental results, this paper contains a deep discussion about the effectiveness and limitations of each algorithm.