The Experts below are selected from a list of 2007 Experts worldwide ranked by ideXlab platform
Woojin Chung - One of the best experts on this subject based on the ideXlab platform.
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IROS - Control architecture design of a multi-Functional Service robot using the GSPN (Generalized-Stochastic Petri-Nets)
2008 IEEE RSJ International Conference on Intelligent Robots and Systems, 2008Co-Authors: Chang-bae Moon, Woojin ChungAbstract:A mobile Service robot should have the ability to carry out multiple practical tasks. However, most mobile mobile Service robots have been designed to carry out a specific task. Hence it has been difficult to design a navigation framework for multiple navigation tasks. In this paper, we will design and implement a navigation framework for multiple tasks using the GSPN (Generalized Stochastic Petri-Nets). The GSPN-based navigation framework has several advantages, such as performance analysis and dynamic system analysis. Furthermore, such a design can process system events in realtime. Also, the typical problem of a hybrid control system, namely the synchronization and scheduling between reactive layer and high-level planner can be solved using the GSPNpsilas event monitoring ability using the timed transition and immediate transition. Finally, the idle time and activation time of the tasks can be predicted under the GSPN-based navigation framework. In this paper, firstly, the transportation task and patrol task are implemented. Then, a navigation framework is designed using the GPSN. The proposed GSPN-based navigation framework is verified in the human co-existing environments by experiments. The results showed that the proposed navigation scheme can be used practically in real environments.
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Control architecture design of a multi-Functional Service robot using the GSPN (Generalized-Stochastic Petri-Nets)
2008 IEEE RSJ International Conference on Intelligent Robots and Systems, 2008Co-Authors: Chang-bae Moon, Woojin ChungAbstract:A mobile Service robot should have the ability to carry out multiple practical tasks. However, most mobile mobile Service robots have been designed to carry out a specific task. Hence it has been difficult to design a navigation framework for multiple navigation tasks. In this paper, we will design and implement a navigation framework for multiple tasks using the GSPN (Generalized Stochastic Petri-Nets). The GSPN-based navigation framework has several advantages, such as performance analysis and dynamic system analysis. Furthermore, such a design can process system events in realtime. Also, the typical problem of a hybrid control system, namely the synchronization and scheduling between reactive layer and high-level planner can be solved using the GSPNpsilas event monitoring ability using the timed transition and immediate transition. Finally, the idle time and activation time of the tasks can be predicted under the GSPN-based navigation framework. In this paper, firstly, the transportation task and patrol task are implemented. Then, a navigation framework is designed using the GPSN. The proposed GSPN-based navigation framework is verified in the human co-existing environments by experiments. The results showed that the proposed navigation scheme can be used practically in real environments.
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Experimental Research of a Passive Multiple Trailer System for Backward Motion Control
Proceedings of the 2005 IEEE International Conference on Robotics and Automation, 2005Co-Authors: Myoungkuk Park, Woojin ChungAbstract:A passive multiple trailer system provides various practical advantages in order to develop multi-Functional Service robots. So far, we have proposed kinematic design of passive trailers, and backward motion control schemes in our prior work. In this paper, we propose two significant considerations based on practical experiences on backward control of multi-trailer system. The first issue is an analysis on the effect of joint errors. Joint errors include joint angle sensing errors and backlashes at the joints. Due to the joint error, the trajectory shows an offset distance from a desired reference path. A second issue is a slip detection based on a simplified dynamic model of the trailer system. The trailer system is designed based on the kinematic constraints, which imply rolling without slipping at wheels. We discuss how a practical trailer system can be controlled without violating kinematic constraints. Finally, we show the analogies and relationships between the off-hooked trailer and the previously proposed three point trailer.
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ICRA - Implementation of multi-Functional Service robots using tripodal schematic control architecture
IEEE International Conference on Robotics and Automation 2004. Proceedings. ICRA '04. 2004, 2004Co-Authors: Woojin ChungAbstract:This paper describes the implementation of multi-Functional Service robots using the Tripodal schematic control architecture. Our strategy has two major advantages. First, the proposed architecture supports Petri net based formal description of tasks and error/fault handling schemes. Second, it provides intuitive and straightforward guidelines system for integration issues. We show reusability and scalability of the proposed architecture by giving two examples of our experience. First, we explain how to add a newly developed cleaning function to our robot system. Second, we introduce the implementation process of a newly developed guide robot Jinny. Most of the modules developed for former robots are used directly in the Jinny system. Experimental results clearly showed that the developed strategy is efficient and easy-to-use.
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Implementation of multi-Functional Service robots using tripodal schematic control architecture
IEEE International Conference on Robotics and Automation 2004. Proceedings. ICRA '04. 2004, 2004Co-Authors: Woojin ChungAbstract:This paper describes the implementation of multi-Functional Service robots using the Tripodal schematic control architecture. Our strategy has two major advantages. First, the proposed architecture supports Petri net based formal description of tasks and error/fault handling schemes. Second, it provides intuitive and straightforward guidelines system for integration issues. We show reusability and scalability of the proposed architecture by giving two examples of our experience. First, we explain how to add a newly developed cleaning function to our robot system. Second, we introduce the implementation process of a newly developed guide robot Jinny. Most of the modules developed for former robots are used directly in the Jinny system. Experimental results clearly showed that the developed strategy is efficient and easy-to-use.
Simon J. Bell - One of the best experts on this subject based on the ideXlab platform.
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Perceived Service quality and customer trust: Does enhancing customers' Service knowledge matter?
Journal of Service Research, 2008Co-Authors: Andreas B Eisingerich, Simon J. BellAbstract:The authors show that investments in enhancing cus- tomers’ Service knowledge strengthen customer trust in an organization and thus can act as an important Service dif- ferentiator. Customer education initiatives, however, also affect the impact of perceived Service quality on customer trust. Successful marketers should be aware of the dynamic relationships between customer education, exper- tise, and Service quality in managing customers’ attitudes toward firms. Using data collected from customers of a global financial Services firm, this study modeled the mul- tifaceted impact of customer education initiatives on the relationship between Service quality and trust. The find- ings suggest that customer education affects the relative importance of technical and Functional Service quality for building customer trust in a firm. Research implications point to new business opportunities for Service differentia- tion and relationship marketing.
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Customer relationship dynamics: Service quality and customer loyalty in the context of varying levels of customer expertise and switching costs
Journal of the Academy of Marketing Science, 2005Co-Authors: Simon J. Bell, Seigyoung Auh, K. SmalleyAbstract:As customer-organization relationships deepen, consumers increase their expertise in the firm's product line and industry and develop increased switching costs. This study investigates the effects of customer investment expertise and perceived switching costs on the relationships between technical and Functional Service quality and customer loyalty. Technical Service quality is hypothesized to be a more important determinant of customer loyalty than Functional Service quality as expertise increases. Both technical and Functional Service quality are hypothesized to have a reduced relationship with customer loyalty as perceived switching costs increase. Three-way interactions between the main effects of Service quality, customer expertise, and perceived switching costs yield additional insight into the change in relative importance of technical and Functional Service quality in customers `decision to be loyal Six of eight hypotheses receive support Implications are discussed for customer relationship management over the relationship life cycle. [ABSTRACT FROM AUTHOR]
K. Smalley - One of the best experts on this subject based on the ideXlab platform.
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Customer relationship dynamics: Service quality and customer loyalty in the context of varying levels of customer expertise and switching costs
Journal of the Academy of Marketing Science, 2005Co-Authors: Simon J. Bell, Seigyoung Auh, K. SmalleyAbstract:As customer-organization relationships deepen, consumers increase their expertise in the firm's product line and industry and develop increased switching costs. This study investigates the effects of customer investment expertise and perceived switching costs on the relationships between technical and Functional Service quality and customer loyalty. Technical Service quality is hypothesized to be a more important determinant of customer loyalty than Functional Service quality as expertise increases. Both technical and Functional Service quality are hypothesized to have a reduced relationship with customer loyalty as perceived switching costs increase. Three-way interactions between the main effects of Service quality, customer expertise, and perceived switching costs yield additional insight into the change in relative importance of technical and Functional Service quality in customers `decision to be loyal Six of eight hypotheses receive support Implications are discussed for customer relationship management over the relationship life cycle. [ABSTRACT FROM AUTHOR]
Dario Babić - One of the best experts on this subject based on the ideXlab platform.
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Predicting Traffic Signs Functional Service Life Using Survival Analysis Method
Road and Rail Infrastructure V, 2018Co-Authors: Anđelko Ščukanec, Milan Patrlj, Mario Fiolić, Dario BabićAbstract:In order to fulfil their function, traffic signs must be visible to all traffic participants in all weather and traffic conditions. This is especially important in conditions of reduced visibility in which, due to the limited amount of visual information, signs present basic elements for informing traffic participants about the upcoming road condition. The quality and timeliness of the informations transfer, in mentioned conditions, are directly related to the retroreflective characteristics of traffic signs. If the signs do not meet the minimum prescribed values of the retroreflection, the authorities should replace them. Given the amount of traffic signs on the roads, the type of retroreflective material and their age, the substitution of signs that do not meet the prescribed values requires significant financial resources. The purpose of this paper is to predict, using Survival analysis method, when the traffic signs, from the aspect of retroreflection, become dysFunctional, i.e. when their replacement is required. The results of this paper may help the road authorities in planning periodic measurements of traffic signs retroreflection and ultimately optimizing the traffic signs maintenance activities, all with the goal of increasing the overall road safety.
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Model for Predicting Traffic Signs Functional Service Life – The Republic of Croatia Case Study
Promet-traffic & Transportation, 2017Co-Authors: Dario Babić, Darko Babić, Dragana MacuraAbstract:Traffic signs are the basic elements of communication between the relevant road authorities and road users. They manage, regulate, inform and warn road users to ensure their safe movement throughout transport networks. Traffic signs must be timely visible to all traffic participants in all weather and traffic conditions in order to fulfil their function, which means they must have satisfactory retroreflection properties. This paper presents a research of the deterioration of traffic signs retroreflection. The aim of this article is to develop models that will effectively enable predicting the retroreflection of traffic signs and thus optimize the maintenance activities and replacement of road signs to increase road safety. The research included measurements of retroreflection of retroreflective material Classes I and II (white, red and blue colour) and Class III (red and yellow colour). Based on the collected data from the City of Zagreb (Republic of Croatia), the authors developed the models to estimate the Functional Service life of certain colours and materials used to make traffic signs. Considering that the average coefficient of determination for all the models is between 0.55-0.60, they present an effective tool in the traffic sign maintenance system.
Chang-bae Moon - One of the best experts on this subject based on the ideXlab platform.
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IROS - Control architecture design of a multi-Functional Service robot using the GSPN (Generalized-Stochastic Petri-Nets)
2008 IEEE RSJ International Conference on Intelligent Robots and Systems, 2008Co-Authors: Chang-bae Moon, Woojin ChungAbstract:A mobile Service robot should have the ability to carry out multiple practical tasks. However, most mobile mobile Service robots have been designed to carry out a specific task. Hence it has been difficult to design a navigation framework for multiple navigation tasks. In this paper, we will design and implement a navigation framework for multiple tasks using the GSPN (Generalized Stochastic Petri-Nets). The GSPN-based navigation framework has several advantages, such as performance analysis and dynamic system analysis. Furthermore, such a design can process system events in realtime. Also, the typical problem of a hybrid control system, namely the synchronization and scheduling between reactive layer and high-level planner can be solved using the GSPNpsilas event monitoring ability using the timed transition and immediate transition. Finally, the idle time and activation time of the tasks can be predicted under the GSPN-based navigation framework. In this paper, firstly, the transportation task and patrol task are implemented. Then, a navigation framework is designed using the GPSN. The proposed GSPN-based navigation framework is verified in the human co-existing environments by experiments. The results showed that the proposed navigation scheme can be used practically in real environments.
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Control architecture design of a multi-Functional Service robot using the GSPN (Generalized-Stochastic Petri-Nets)
2008 IEEE RSJ International Conference on Intelligent Robots and Systems, 2008Co-Authors: Chang-bae Moon, Woojin ChungAbstract:A mobile Service robot should have the ability to carry out multiple practical tasks. However, most mobile mobile Service robots have been designed to carry out a specific task. Hence it has been difficult to design a navigation framework for multiple navigation tasks. In this paper, we will design and implement a navigation framework for multiple tasks using the GSPN (Generalized Stochastic Petri-Nets). The GSPN-based navigation framework has several advantages, such as performance analysis and dynamic system analysis. Furthermore, such a design can process system events in realtime. Also, the typical problem of a hybrid control system, namely the synchronization and scheduling between reactive layer and high-level planner can be solved using the GSPNpsilas event monitoring ability using the timed transition and immediate transition. Finally, the idle time and activation time of the tasks can be predicted under the GSPN-based navigation framework. In this paper, firstly, the transportation task and patrol task are implemented. Then, a navigation framework is designed using the GPSN. The proposed GSPN-based navigation framework is verified in the human co-existing environments by experiments. The results showed that the proposed navigation scheme can be used practically in real environments.
