• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.439-442
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• 2003

In order to solve the difficulties of parameter settings in SA algorithm, an improved practical SA algorithm is proposed by employing the threading techniques, appropriate software structures, and dynamic adjustments of temperature parameters. Threads provide a mechanism to realize a parallel processing under a disperse environment by controlling the flux of internal information of an application. Thread services divide a process by multiple processes leading to parallel processing of information to access common data. Therefore, efficient search is achieved by multiple search processes, different initial conditions, and automatic temperature adjustments. The proposed are methods are evaluated, for three types of Traveling Salesman Problem (TSP) (random-tour, fractal-tour, and TSPLIB test data)are used for the performance evaluation. The experimental results show that the computational time is 5％ decreased comparing to conventional SA algorithm, furthermore there is no need for manual parameter settings. These results also demonstrate that the proposed method is applicable to real-world vehicle routing problems.

• Smart Structures and Systems
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• 제24권4호
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• pp.427-434
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• 2019

This study investigates the structural integrity of the amphibious tour bus under the rollover condition. The multi-purpose bus called Dual Mode Tour Bus (DMTB) which explores on land and water has been designed on top of a truck platform. Prior to the fabrication of new upper body and sailing equipment of DMTB, computational analysis investigates the rollover protection of the proposed structure including superstructure, wheels, and axles. The Computer-Aided Design (CAD) of the whole vehicle model is meshed and preprocessed under high performance using the Altair HyperMesh to attain the best mesh model suited for finite element analysis (FEA) on the proposed system. Meanwhile, the numerical model is analyzed by employing LS-DYNA to evaluate the superstructure strength. The numerical model includes detail information about the microstructure and considers wheels and axles as rigid bodies but excludes window glasses, seats, and interior parts. Based on the simulation analysis and proper modifications especially on the rear portion of the bus, the local stiffness significantly increased. The vehicle is rotated to the contact point on the ground based on the mathematical method presented in this study to save computational cost. The results show that the proposed method of rollover analysis is highly significant not only in bus rollover tests but in crashworthiness studies for other application. The critical impartments in our suggested dual-purpose bus accepted and passed "Economic Commission for Europe (ECE) R66".

• Journal of the Daesoon Academy of Sciences
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• 제20권
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• pp.67-94
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• 2009

Kang Jeung-san whose real name is Kang Il-soon was a Korean born thinker who thought himself as Shangti(上帝). It is told that he made a Great Tour(大巡) upon this world. His thought was affected by Asian traditional philosophy such as Confucianism, Buddhism and Daoism. He founded a religious body, called Jeung-san-Gyo which could be formed a syncretism of East Asian traditional thoughts. We have to survey Asian traditional thoughts in order to understand Kang Jeung-san's religious thinking. According to the Great Tour Scripture(大巡典經), he have read Confucian moral books, holy Sutra of Buddha and the books of Daoism. In the field of Confucianism, he stressed upon the Book of Changes (Zou-yi; 周易). And for Buddhism, he showed great concern on a monk, Jin-mook(震黙) who lived 15th century in Chosun Dynasty. Jeung-san Shangti followed Daoistic way when he performed religious ritual. In case of performance, he was compared as a great Shaman who wanted to save the world. And the most typical ritual was called public business of Heaven and Earth(天地公事). He showed a great scale while he was touring the world in space. The most important thing, however, is to overcome the localization which seems still prevailing doctrine of the Jeung-san thought. For this, the followers of Jeung-san-Gyo should study world philosophy and accept the modernity so as to broaden Jeung-san thought to the rest of the world.

• Knowledge Management Research
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• 제11권3호
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• pp.47-58
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• 2010

Knowledge is fundamental asset for firms in the contemporary economy. Organizations are attempting to leverage their knowledge resources by employing knowledge management. However, a large number of KM initiatives fail due to the ignoring of human factors. We adopt theoretical framework and augment it with extrinsic variables, individual, organizational, and systematic factors that are believed to influence knowledge sharing and outcome of travel agency.

• Asia-Pacific Journal of Business
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• 제14권2호
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• pp.167-185
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• 2023

Purpose - The purpose of this study is to identify the influence relationship between positive psychological capital, job satisfaction, and organizational commitment of tourism guides, and to provide implications through empirical research to increase the capabilities of tourism guides that are a factor in the performance of planned travel products Design/methodology/approach - This study conducted an empirical survey using the google online questionnaire. It was directly surveyed, distributed, and collected from workers who were or were performing tourism guide duties in Asia and Europe, and 203 questionnaires were used for analysis. The empirical survey was conducted in a self-written manner through a simple random sampling method, and the statistical package was conducted with frequency analysis, factor analysis, multiple regression analysis, and correlation analysis using the spss 21.0 program. Findings - First, among the positive psychological capital factors, two factors, hope and optimism, have a significant positive (+) effect on job satisfaction. Second, among the positive psychological capital factors, two factors, self-efficacy and optimism, have a significant positive (+) effect on organizational commitment. Third, job satisfaction has a significant positive (+) effect on organizational commitment Research implications or Originality - The implications of this study are that the research results have had a positive (+) effect on the variables of positive psychological capital, job satisfaction, and organizational commitment of tourism guides, and have laid the foundation for academic research on research topics. In practice, it is expected to increase the positive psychological capital of tourism guides and have a significant impact on the organization's performance by actively supporting and supporting individuals related to the sustainable growth of travel products.

• Journal of the Korean Society of Industry Convergence
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• 제20권1호
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• pp.19-26
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• 2017

In this paper, we describe the design and performance of UAV system toward compact and fully autonomous quadrotors, where they can complete logistics application, rescue work, inspection tour and remote sensing without external assistance systems like ground station computers, high-performance wireless communication devices or motion capture system. we propose high-speed hovering flyght height control method based on state feedback control with image information from active camera and multirate observer because we can get image of the information only every 30ms. Finally, we show the advantages of proposed method by simulations and experiments.

• Journal of Digital Contents Society
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• 제3권1호
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• pp.89-99
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• 2002

Saturation routing algorithm is known to be an effective routing mechanism for tactical application and packet radio networks, since it minimizes the call set-up time and does not have to maintain routing tables. But, it is known that it has significant drawbacks with respect to the network efficiency, the overhead on the control messages [1]. We consider a tactical circuit-switched grid network with a maximum of tour links and two priority classes of voice traffic. Using the minimum first-derivative length (MFDL) path, we improve the blocking probability performance of a circuit-switched network without increasing the call set-up time and processor loading of the algorithm.

• Journal of the Korean Society of Food Culture
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• 제26권3호
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• pp.261-270
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• 2011

The purpose of this study was to investigate the relationship between 'family-work conflict/work-family conflict', job burnout, job satisfaction, and individual job performance in the employees at the restaurants in Daegu City. The sample of this study consisted of employees at the restaurants in Daegu City who visited the 2010 Daegu Food Tour Expo between October 7 and October 10. A total of 302 questionnaires were analyzed using statistical methods of factor analysis, reliability test, and covariance structural analysis. The research findings were as follows; firstly, work-family conflict was positively related to job burnout, secondly, job burnout was negatively related to job satisfaction and individual job performance and thirdly, job satisfaction was positively related to individual job performance. However, there was no relationship between family-work conflict and job burnout. The reason for rejection of the relationship between family-work conflict and job burnout was that family-related affairs were not important enough to affect job burnout among restaurant employees in Korea. This phenomenon happened differently in the US. Therefore, currently, restaurant managers in Daegu City should pay much attention to work-related affairs so as to mitigate job burnout as much as possible among their employees.

• Journal of the Korean Operations Research and Management Science Society
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• 제30권2호
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• pp.157-167
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• 2005

This paper presents a new perturbation technique for developing efficient iterated local search procedures for the asymmetric traveling salesman problem(ATSP). This perturbation technique uses global information on ATSP instances to speed-up computation and to improve the quality of the tours found by heuristic method. The main idea is to escape from a local optima by introducing perturbations on the out-of-kilter arcs in the problem instance. For a local search heuristic, we use the Kwon which finds optimum or near-optimum solutions by applying the out-of-kilter algorithm to the ATSP. The performance of our algorithm has been tested and compared with known method perturbing on randomly chosen arcs. A number of experiments has been executed both on the well-known TSPLIB instances for which the optimal tour length is known, and on randomly generated Instances. for 27 TSPLIB instances, the presented algorithm has found optimal tours on all instances. And it has effectively found tours near AP lower bound on randomly generated instances.

• Proceedings of the KSR Conference
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1320-1327
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• 2010

This study is designed to provide a facilitation program of the railroad tourist business that the bicycle is connected with the railroad. The sustainable growth will be achieved thorough the green growth being able to coexist with environment. To deal with the transportation problems -the environmental pollution caused by a large number of cars and the energy depletion, the traffic congestion- in our society is the prerequisites for the green growth. There is the need focusing on the expansion of the green network and the policy implementation of utilizing the bicycle, the formulation of the social consensus for environmental preservation. This provides the opportunity that we create the customer values and reinforce the firm's competitiveness. This study is to propose the plan for accelerating the tourism business connected to the bicycle, and to contribute to the government policy, to boost the green image of the railroad. Approaching in the strategic way to increase the customer's value and environmental preservation, this study will contribute to providing high quality customer service for both of the business performance and the customer satisfaction.