Busan, South Korea

Busan University of Foreign Studies , often shortened to 부산외대 and BUFS, is a private, Christian university in Busan, the Republic of Korea, which specializes in teaching foreign languages. Wikipedia.


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Shin K.J.,Busan University of Foreign Studies
FTC 2016 - Proceedings of Future Technologies Conference | Year: 2016

In recently, detection of the object is foremost but it depends on an object and environment. An object can be detected either by its shape or color. Color is an essential for pattern recognition and computer vision, it is an attractive feature because of its simplicity and its robustness to scale changes and object positions. Generally, the color of an object depends on its characteristics of the perceiving eye and brain. Physically, objects can be said to have the color of the light leaving their surfaces. In the aquarium different color fish robots are mimic the natural fish. Unfortunately, in the underwater medium, the colors are modified by attenuation and difficult to identify the color for moving objects. We consider the fish motion as a moving object and coordinates are found at every instinct of the aquarium to detect the position of the fish robot using Simulink. In this, we proposed to identify the particular object by their color and its trajectory motion of the object throughout time has to be found. It was verified by the performance test of detecting the position of the fish robot. © 2016 IEEE.


Shin K.J.,Busan University of Foreign Studies | Musunuri Y.R.,Busan University of Foreign Studies
FTC 2016 - Proceedings of Future Technologies Conference | Year: 2016

In this paper, we need to detect the 3 axes position of the swimming fish robot in order to implement the aquarium fish underwater robot world. And, it implements positional control of the 3axes trajectory path for fish robot. The applied robot was verified the performance though the certificated fields test. It was satisfied the excellent performance such as driving force, durability and water resistance in experimental results. We can find robot position that it is to recognize an object by using a video camera without any other sensors inside the fish robot. It is possible to find the fish robot position detection value of the absolute coordinate 3 axes using the proposed object recognition methods which are applied the optical flow object detecting method with boundary filter and optical flow method. Also, the fish robot model is designed to detect 3 axes using the proposed model of 3 axes tracking using optical flow detecting method, which model is realized by the MATLAB and Simulink and control the position of the swimming fish robot which following to 3D holograms fish. It was verified by the performance test for the designed aquarium fish robot world. © 2016 IEEE.


Shin K.J.,Busan University of Foreign Studies | Angani A.V.,Busan University of Foreign Studies
FTC 2016 - Proceedings of Future Technologies Conference | Year: 2016

This paper is about the design of vertical aquarium energy management system (VAEMS). This system is newly introduced to the world. These day's Thermal power plants discharges the waste hot water directly into sea or ocean leads to the thermal pollution that results in death and decay of water plants and animals. With this objective in view, the vertical aquarium energy management system with 40 URT heat pump is designed. Other end, now days Aquaculture make the aquarium builds one beside other, so it occupies more space, in this vertical aquarium, aquarium builds one over another to reduce the space, so that it is called vertical aquarium. The main concept of vertical aquarium is using warm water for growing fishes, so that we design 40 URT heap pump, this heat pump is used to reduce the maintenance and electricity cost. This design is not only ecofriendly, but also the effective utilization of waste hot water is achieved through vertical aquarium. This project initiates to go forward through ICT (Information and communications technology). ICT is dealing the best projects like city development and encouraging the creative thinking plans and support to fund many projects. The basic components in VAEMS are, the 40 URT heat pump made with specially designed like tube typed evaporator, semi screw compressor, plated type condenser and expansion valve. The experimental results of the heat pump have been satisfied for the design of the aquarium. © 2016 IEEE.


Leem B.,Busan University of Foreign Studies | Chun H.,Dongduk Women's University
Expert Systems with Applications | Year: 2014

This study proposes roles of online recommendation network on online book marketplace with social network perspective. Also this paper is to provide a new perspective on how Social Network Analysis (SNA) can be used to study the influence on demand by the recommendation network. We first built the books' recommendation network based on the co-purchasing data of customers and then computed the five network centralities and clustering coefficients using NodeXL. We also analyzed our research model by correlation and multiple regression analysis. The results of correlation analysis show a significant correlation between the six SNA measures - degree centrality, closeness centrality, betweenness centrality, eigenvector centrality, PageRank centrality, and clustering coefficient-and demand, as well as the six SNA measures. The result of regression analysis demonstrates that five of six SNA measures in the recommendation network have a significant effect towards demand, and then the largest effect towards a book's demand is associated with degree centrality. According to our results, a book's position within this network affects its overall demand. Hence managers should build more effective and accurate recommendation network of books including data customers co-purchased, and in turn, position books with a high degree of centrality on the website. © 2013 Elsevier Ltd. All rights reserved.


Kim H.S.,Dong - A University | Cho J.H.,Busan University of Foreign Studies
Decision Support Systems | Year: 2010

This study has used agent negotiation as a way to allocate numerous orders to many participants for supply chain formation. In order to build a strategic cooperative relationship based on information sharing, agent negotiation provides a coordination mechanism in which all the participants, including buyers, manufacturers, and suppliers, are able to attain their own profits. It also provides a Pareto optimal solution from the viewpoint of a whole supply chain. This study has taken into consideration the fact that both tardiness and earliness production costs occur in the Single Machine Earliness/Tardiness (SET model) scheduling and that participating members are in a competitive relationship. We have explored and experimented to prove that agent negotiation leads to a Pareto optimal solution in a dynamic supply chain environment. This study has built a mathematical model to test the performance of agent negotiations, while making a comparison with a heuristic approach. © 2010 Elsevier B.V. All rights reserved.


Cho J.H.,Busan University of Foreign Studies | Kim H.S.,Dong - A University | Choi H.R.,Dong - A University
Applied Intelligence | Year: 2012

This paper presents a dynamic programming algorithm to draw optimal intermodal freight routing with regard to international logistics of container cargo for export and import. This study looks into the characteristics of intermodal transport using multi-modes, and presents a Weighted Constrained Shortest Path Problem (WCSPP) model. This study draws Pareto optimal solutions that can simultaneously meet two objective functions by applying the Label Setting algorithm, a type of Dynamic Programming algorithms, after setting the feasible area. To improve the algorithm performance, pruning rules have also been presented. The algorithm is applied to real transport paths from Bu-san to Rotterdam, as well as to large-scale cases. This study quantitatively measures the savings in both transport cost and time by comparing single transport modes with intermodal transport paths. Last, this study applies a mathematical model and MADM model to the multiple Pareto optimal solutions to estimate the solutions. © 2011 Springer-Verlag.


Yim B.,Yeungnam University | Leem B.,Busan University of Foreign Studies
Industrial Management and Data Systems | Year: 2013

Purpose - The aim of this paper is to demonstrate that supply chain social capital has an effect on supply chain integration, which in turn has a significant on firm performance, and then supply chain integration mediates the relationship between supply chain social capital and firm performance. Design/methodology/approach - The authors validated their model and tested the hypotheses using the partial least squares (PLS) structural equation model (SEM). Findings - Empirical results reveal that the three dimensions of supply chain social capital - structural, relational, and cognitive - had significant effects, directly or indirectly, on supply chain integration and performance, and supply chain integration played a mediating role in the relationships between structural capital and firm performance, between relational capital and firm performance, and between cognitive capital and firm performance. Research limitations/implications - Since the survey data were collected at various industries in Korea, it is difficult to gain social network benefits for a specific industry through worldwide. Therefore, to obtain more meaningful results, the authors would collect the data for special product family in the special industry. But the study suggests that supply chain integration among supply chain partners can be improved by building up social capital, firm performance can be enhanced by improving supply chain integration, and consequently, supply chain integration should serve to enhance firm's profitability. Originality/value - The main contribution of this paper investigates whether supply chain integration mediates the relationship between supply chain social capital and firm performance in the supply chain using the PLS and Baron and Kenny's approach. © Emerald Group Publishing Limited.


Shin K.,Busan University of Foreign Studies | Musunuri Y.R.,Busan University of Foreign Studies
International Conference on Electronics, Information, and Communications, ICEIC 2016 | Year: 2016

In this paper, the designed fish robot is researched and developed for an aquarium underwater robot. This paper is a study on how the outside technology merely to find the location of fish robots without specific sensor or internal devices for these fish robot. The model of the Fish Robot is designed to detect the position of an optical flow of the Fish Robot in the Mat lab and Simulink. This paper intends to recognize the shape of the tank via a video device such as a camera or camcorder using an image processing technique to identify the location of the fish robot. Here, we are applied to the image comparing algorithm by using the average color weight algorithm method. In this, position coordinate system is used to find the position coordinates of the fish to identify the position of the Fish Robot with three axes by using proposed model of 3 axes object tracking algorithm. It was verified by the performance test of designed fish robot. © 2016 IEEE.


Na S.-H.,Busan University of Foreign Studies
ACM Transactions on Information Systems | Year: 2015

The standard approach for term frequency normalization is based only on the document length. However, it does not distinguish the verbosity from the scope, these being the twomain factors determining the document length. Because the verbosity and scope have largely different effects on the increase in term frequency, the standard approach can easily suffer from insufficient or excessive penalization depending on the specific type of long document. To overcome these problems, this article proposes two-stage normalization by performing verbosity and scope normalization separately, and by employing different penalization functions. In verbosity normalization, each document is prenormalized by dividing the term frequency by the verbosity of the document. In scope normalization, an existing retrieval model is applied in a straightforward manner to the prenormalized document, finally leading us to formulate our proposed verbosity normalized (VN) retrieval model. Experimental results carried out on standard TREC collections demonstrate that the VN model leads to marginal but statistically significant improvements over standard retrieval models. © 2015 ACM.


Lim I.,Busan University of Foreign Studies
International Journal of Multimedia and Ubiquitous Engineering | Year: 2014

The PS algorithm divides the tags within the reader's identification range into smaller groups by increasing the transmission power incrementally and identifies them. This algorithm uses the fixed frame size at every scan. Therefore, it has problems that the performance can be variously shown according to the number of tags, frame size, and power level increase. In this paper, we propose an EPS algorithm that allocates the optimal frame size by estimating the number of tags at each scan. The simulation results showed that the identification delay of EPS algorithm could be improved 70% compared with PS algorithm. It also provided a stable identification delay regardless of power level increase. © 2014 SERSC.

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