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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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International Journal of Fuzzy Logic and Intelligent Systems
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Journal DOI :
Korean Institute of Intelligent Systems
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Volume & Issues
Volume 10, Issue 4 - Dec 2010
Volume 10, Issue 3 - Sep 2010
Volume 10, Issue 2 - Jun 2010
Volume 10, Issue 1 - Mar 2010
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A Fuzzy Approach to Social Worker's Turnover Intention
Jang, Yun-Jeong ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 165~169
DOI : 10.5391/IJFIS.2010.10.3.165
This study seeks to find the factors associated with social workers' turnover intention and show us how to manage turnovers by looking for some rules affecting turnover intentions. Our investigation surveying 331 social workers reveals that social workers' turnover intentions are affected by organizational commitment, job satisfaction, and burnout. Our pattern analyses using fuzzy ID3 show that the higher their commitment, the higher their job satisfaction stemming from promotion opportunities, rewards, and personal relations with peers and bosses. In addition, turnover intentions decreases (even if burnouts--the job-related stress--are very serious) when organizational commitment increases. We come to understand that organizational commitment could be a more important variable than job satisfaction and burnouts. Such results suggest that it would be necessary to consider how to improve social workers' organization-wide commitment rather than satisfaction and burnout related to jobs and environments.
A Learning AI Algorithm for Poker with Embedded Opponent Modeling
Kim, Seong-Gon ; Kim, Yong-Gi ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 170~177
DOI : 10.5391/IJFIS.2010.10.3.170
Poker is a game of imperfect information where competing players must deal with multiple risk factors stemming from unknown information while making the best decision to win, and this makes it an interesting test-bed for artificial intelligence research. This paper introduces a new learning AI algorithm with embedded opponent modeling that can be used for these types of situations and we use this AI and apply it to a poker program. The new AI will be based on several graphs with each of its nodes representing inputs, and the algorithm will learn the optimal decision to make by updating the weight of the edges connecting these nodes and returning a probability for each action the graphs represent.
Augmented Reality of Robust Tracking with Realistic Illumination
Kim, Young-Baek ; Lee, Hong-Chang ; Rhee, Sang-Yong ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 178~183
DOI : 10.5391/IJFIS.2010.10.3.178
In this study we augmented a virtual object to an image of a flexible surface such as a paper, which is acquired from a web camera. To get more presence feeling, we consider realistic illumination on augmenting. To get the geometric relation between the camera and the flexible surface, we use markers that are printed on the surface. Using marker information in prior, three dimensional coordinates of the surface can be calculated. After the marker is removed from the input image, we attach a two dimensional texture and shadow to the flexible surface by considering realistic illumination.
Existence of Periodic Solutions for Fuzzy Differential Equations
Kwun, Young-Chel ; Kim, Jeong-Soon ; Hwang, Jin-Soo ; Park, Jin-Han ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 184~193
DOI : 10.5391/IJFIS.2010.10.3.184
In this paper, we investigate the existence and calculation of the expression of periodic solutions for fuzzy differential equations with three types of forcing terms, by using Hukuhara derivative. In particular, Theorems 3.2, 4.2 and 5.2 are the results of existences of periodic solutions for fuzzy differential equations I, II and III, respectively. These results will help us to study phenomena with periodic peculiarity such as wave or sound.
Fixed Point Theorem for Compatible Maps with Type(I) and (II) in Intuitionistic Fuzzy Metric Space
Park, Jong-Seo ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 194~199
DOI : 10.5391/IJFIS.2010.10.3.194
In this paper, we give definitions of compatible mappings of type(I) and (II) in intuitionistic fuzzy metric space and obtain common fixed point theorem and example under the conditions of compatible mappings of type(I) and (II) in complete intuitionistic fuzzy metric space. Our research generalize, extend and improve the results given by many authors.
Fuzzy γ-Quasi Open Set and Fuzzy γ-Quasi Continuity
Min, Won-Keun ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 200~202
DOI : 10.5391/IJFIS.2010.10.3.200
In this paper, we introduce the concept of fuzzy
-quasi open sets which are generalizations of fuzzy
-open sets, and obtain some basic properties of such fuzzy sets. Also we introduce and study the concepts of fuzzy
-quasi continuous mapping and fuzzy
-quasi open(closed) mapping.
Hierarchical Fuzzy Motion Planning for Humanoid Robots Using Locomotion Primitives and a Global Navigation Path
Kim, Yong-Tae ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 203~209
DOI : 10.5391/IJFIS.2010.10.3.203
This paper presents a hierarchical fuzzy motion planner for humanoid robots in 3D uneven environments. First, we define both motion primitives and locomotion primitives of humanoid robots. A high-level planner finds a global path from a global navigation map that is generated based on a combination of 2.5 dimensional maps of the workspace. We use a passage map, an obstacle map and a gradient map of obstacles to distinguish obstacles. A mid-level planner creates subgoals that help the robot efficiently cope with various obstacles using only a small set of locomotion primitives that are useful for stable navigation of the robot. We use a local obstacle map to find the subgoals along the global path. A low-level planner searches for an optimal sequence of locomotion primitives between subgoals by using fuzzy motion planning. We verify our approach on a virtual humanoid robot in a simulated environment. Simulation results show a reduction in planning time and the feasibility of the proposed method.
Integrated Path Planning and Collision Avoidance for an Omni-directional Mobile Robot
Kim, Dong-Hun ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 210~217
DOI : 10.5391/IJFIS.2010.10.3.210
This paper presents integrated path planning and collision avoidance for an omni-directional mobile robot. In this scheme, the autonomous mobile robot finds the shortest path by the descendent gradient of a navigation function to reach a goal. In doing so, the robot based on the proposed approach attempts to overcome some of the typical problems that may pose to the conventional robot navigation. In particular, this paper presents a set of analysis for an omni-directional mobile robot to avoid trapped situations for two representative scenarios: 1) Ushaped deep narrow obstacle and 2) narrow passage problem between two obstacles. The proposed navigation scheme eliminates the nonfeasible area for the two cases by the help of the descendent gradient of the navigation function and the characteristics of an omni-directional mobile robot. The simulation results show that the proposed navigation scheme can effectively construct a path-planning system in the capability of reaching a goal and avoiding obstacles despite possible trapped situations under uncertain world knowledge.
Mutual Information Analysis with Similarity Measure
Wang, Hong-Mei ; Lee, Sang-Hyuk ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 218~223
DOI : 10.5391/IJFIS.2010.10.3.218
Discussion and analysis about relative mutual information has been carried out through fuzzy entropy and similarity measure. Fuzzy relative mutual information measure (FRIM) plays an important part as a measure of information shared between two fuzzy pattern vectors. This FRIM is analyzed and explained through similarity measure between two fuzzy sets. Furthermore, comparison between two measures is also carried out.
On Choquet Integrals with Respect to a Fuzzy Complex Valued Fuzzy Measure of Fuzzy Complex Valued Functions
Jang, Lee-Chae ; Kim, Hyun-Mee ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 224~229
DOI : 10.5391/IJFIS.2010.10.3.224
In this paper, using fuzzy complex valued functions and fuzzy complex valued fuzzy measures () and interval-valued Choquet integrals ([2-6]), we define Choquet integral with respect to a fuzzy complex valued fuzzy measure of a fuzzy complex valued function and investigate some basic properties of them.
Some Fundamental Concepts in (2, L)-Fuzzy Topology Based on Complete Residuated Lattice-Valued Logic
Zeyada, Fathei M. ; Zahran, A.M. ; El-Baki, S.A.Abd ; Mousa, A.K. ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 230~241
DOI : 10.5391/IJFIS.2010.10.3.230
In the present paper we introduce and study fundamental concepts in the framework of L-fuzzifying topology(so called(2,L)-fuzzy topology)as L-concepts where L is a complete residuated lattice. The concepts of (2,L)-derived, (2,L)-closure, (2,L)-interior, (2,L)-exterior and (2,L)-boundary operators are studied and some results on above concepts are obtained. Also, the concepts of an L-convergence of nets and an L-convergence of filters are introduced and some important results are obtained. Furthermore, we introduce and study bases and subbases in (2,L)-topology. As applications of our work the corresponding results(see[10-11]) are generalized and new consequences are obtained.
Some Notes on L
-metric Space of Fuzzy Sets
Kim, Yun-Kyong ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 242~246
DOI : 10.5391/IJFIS.2010.10.3.242
It is well-known that the space
of fuzzy numbers(i.e., normal, upper-semicontinuous, compact-supported and convex fuzzy subsets)in the n-dimensional Euclidean space
is separable but not complete with respect to the
-metric. In this paper, we introduce the space
that is separable and complete with respect to the
-metric. This will be accomplished by assuming p-th mean bounded condition instead of compact-supported condition and by removing convex condition.
The Properties of Various Concepts
Kim, Yong-Chan ; Ko, Jung-Mi ;
International Journal of Fuzzy Logic and Intelligent Systems, volume 10, issue 3, 2010, Pages 247~252
DOI : 10.5391/IJFIS.2010.10.3.247
In this paper, we investigate the relations among formal concepts, attribute oriented concept and object oriented concepts on a complete residuated lattice.