• Transactions of the Korean Society of Mechanical Engineers A
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• v.25 no.4
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• pp.671-684
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• 2001

Several design problems of composite structures are studied via a global optimizer based on attraction regions. MSC/NASTRAN is adopted for static and eigenvalue analysis. The method of modified feasible direction in DOT is used for local optimization. Through the review of global optimization algorithms, the triangular patch algorithm is selected because the algorithm is known to be efficient, robust and powerful for general nonlinear optimization problems. For general applicability, various mechanical properties are considered as design objectives; strain energy, eigenvalue, weight, displacement, and buckling load. In all cases considered, the triangular patch algorithm results in a lot of optimum points and useful design patterns, that are not easy by local algorithms or conventional global algorithms can be determined.

• Journal of Institute of Control, Robotics and Systems
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• v.10 no.6
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• pp.529-536
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• 2004

Autonomous navigation of an indoor mobile robot using the global ultrasonic system is presented in this paper. Since the trajectory error of the dead-reckoning navigation grows with time and distance, the autonomous navigation of a mobile robot requires to localize the current position of the robot, so that to compensate the trajectory error. The global ultrasonic system consisting of four ultrasonic generators fixed at a priori known positions in the work space and two receivers on the mobile robot has the similar structure with the well-known satellite GPS(Global Positioning System), and it is useful for the self-localization of an indoor mobile robot. The EKF(Extended Kalman Filter) algorithm for the self-localization is proposed and the autonomous navigation based on the self-localization is verified by experiments.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.7
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• pp.624-630
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• 2007

The dynamic window approach(DWA) is a well known technique for reactive collision avoidance. It shows safe and efficient performance in real-world experiments. However, a robot can get stuck in local minima because no information about the connectivity of the free space is used to determine the motion. The global DWA can solve this problem of local minima by adding a navigation function. Even with the global DWA, it is still difficult for a robot to execute an abrupt change in its direction, for example, entering from the corridor to a doorway. This paper proposes a modified global DWA using the included angles of waypoints extracted from an optimal path. This scheme enables the robot to decelerate in advance before turning into the doorway. Therefore the robot can reach the goal position more safely and efficiently at high speeds.

• Journal of the Chungcheong Mathematical Society
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• v.29 no.1
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• pp.59-71
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• 2016

To obtain more accurate approximation of the true images in the deblurring problems, the weighted global generalized cross validation(GCV) function to the inverse problem with multiple right-hand sides is suggested as an efficient way to determine the regularization parameter. We analyze the experimental results for many test problems and was able to obtain the globally useful range of the weight when the preconditioned global conjugate gradient linear least squares(Gl-CGLS) method with the weighted global GCV function is applied.

• Journal of the Korea Society of Computer and Information
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• v.22 no.8
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• pp.15-23
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• 2017

In this paper, the block reweighting and global offset initialization methods are proposed to complement the improved IRLMS algorithm which is the effective algorithm in registration based SBNUC algorithm. Proposed block weighting method reweights the error map whose abnormal data are excluded. The global offset initialization method compensates the global nonuniformity initially. The ordinary registration based SBNUC algorithm is hard to compensate global nonuniformity because of low scene motion. We employ the proposed methods to improved IRLMS algorithm, and apply it to real-world infrared raw image stream. The result shows that new implementation provides 3.5~4.0dB higher PSNR and convergence speed 1.5 faster then the improved IRLMS algorithm.

• Journal of the Korean Society of Clothing and Textiles
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• v.22 no.7
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• pp.882-891
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• 1998

This study purported to analyze the condition of the degree standardization and types of global ads. in the multinational fashion brand corporations. The analyzed ads. were sampled from monthly magazines on same seasons in 1997. This study was done by means of checklists were modified other researcher's research measurments. Researcher counted of advertising message. Zero point meant perfect stan-dardization and 13 points meant perfect non-standardization. The types of advertising appeal were analyzed according to constituent unit's expression types. The results of the study proved that the degree of standardization was considerably high, which means that the multinational fashion brand corporations used the standardization strategy. In particular, the degree of standardization in sports wear and casual wear ads. was low compared with the degree of standardization in the other ads. Most of the global fashion ads. were composed of illustrations only. Besides, emotional appeal type was usually used in glabal fashion ads.

• Journal of Plant Biotechnology
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• v.43 no.2
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• pp.147-150
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• 2016

Global GM crops continue to grow. They have reached 181 million hectares. A total of 28 countries have approved biotech crops for planting. More than 60 countries have approved biotech crops to be imported as food and feed since 1996, meaning that biotech crops are now commonly accepted in those countries. Although biotech crops provide key solutions for the challenge of global food security in the future due to population growth and climate change, there are still some debates on whether biotech crops should be accepted in many countries including Korea. Therefore, it is very important to make people understand that GM crops will provide benefits to both farmers and consumers. In this review, current global status of GM crop development and commercialization are summarized.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.512-513
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• 2003

Human activities have become a major factor that significantly changes the global environment. Mankind has increasingly used land, water, minerals and other natural resources since the beginning of industrialization, and future growth in the population and economy is thought to further enhance the impact upon the Earth. The global climate, biogeochemical process and natural ecosystems are closely linked with one another, and changes in any one of these systems may effect the others, which could result in consequences detrimental to humans and other living organisms on the Earth.(omitted)

• Journal of Information Technology Services
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• v.13 no.3
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• pp.77-92
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• 2014

Korean entertainment companies like SM entertainment, YG and JYP contribute enormously to the recent K-pop fever. They expand their businesses aggressively to foreign markets which has been successful. This paper seeks to find out their precise strategies to succeed in the global market. Our study focus on SM entertainment which manages successively in the Asian market. As a result, one of their successful strategies on the global market is localization. They rearrange a group with in the members to suit into the local market : for instance, Super Junior, representative boy group, has rearranged and reformed to Super Junior M (mandarin), Super Junior happy (for Japan market), etc. Coopration with SNS (Social Network Service) is another successful strategies of SM Entertainment : page views of K-pop on Youtube achieved more than 0.8 billion in 2013. Furthermore, for marketing, many members play an advertizing model for global products.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06c
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• pp.507-511
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• 2008

컴퓨터 비전을 기반으로 한 영상처리 및 제스처인식 기술을 이용하여 편리하게 응용프로그램을 제어 할 수 있는 인터페이스를 구성하였다. 카메라로 얻어진 영상을 HSV 색상계로 변환 후 색상 정보를 이용하여 손 영역을 추출한다. 추출된 손 영역의 무게중심과 크기 변화를 추적하여 제스처를 인식한다. 인식한 제스처는 응용프로그램의 동작을 제어하거나 마우스의 입력을 대체하는데 사용된다. 이는 별도의 입력장치 없이 컴퓨터 비전 기술만으로 제스처를 인식하여 응용프로그램을 실행할 수 있어 자연스러우며 사용자 친화적인 인터페이스 환경을 제공한다.