• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.77-84
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• 2015

Digital signage takes the role of promotion, providing information, art and game as it is installed in various forms everywhere such as the road, subway and indoor space we pass through. The related researches also focus on the technology of realizing digital signage, current industrial state and prospect in most cases. On the contrary, the researches on the spaciality of digital signage is a kind of insufficient, this study was carried out based on the judgment that there is necessity of researching it in respect that the recognition of space by the people in there is different before and after digital signage is located in such space. First, in order to understand digital signage, its concept, type and kind were investigated, general theories about the spaciality were considered after that, the spaciality of digital signage was grasped by 5 factors such as hybridity, vitality, mobility, flexibility, and contingency and their characteristics were offered in this study. In its conclusion, it was appealed that the change of spatial recognition along media and continuous research are required as digital signage is the transactive space.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6849-6855
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• 2014

Recently, with the increasing use of smart phones, security issues, such as safety and reliability of the use of the Android application has become a topic to provide services in various forms. An Android application is performed using several important files in the form of an apk file. On the other hand, they may be subject to unauthorized use, such as the loss of rights and privileges due to the insertion of malicious source code of these apk files. This paper examines the Android environment to study ways to define the threats related to the unauthorized use of the application source code, and based on the results of the analysis, to prevent unauthorized use of the application source code. In this paper, a system is provided using a third body to prevent and detect applications that have been counterfeited or forged illegally and installed on Android devices. The application provides services to existing systems that are configured with only the service server that provides users and applications general, This paper proposes the use of a trusted third party for user registration and to verify the integrity of the application, add an institution, and provide a safe application.

• Advances in Computational Design
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• v.3 no.4
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• pp.339-366
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• 2018

Parametric design systems serve as powerful assistive tools in the design process by providing a flexible approach for the generation of a vast number of design alternatives. However, contemporary parametric design systems focus primarily on low-level engineering and structural forms, without an explicit means to also take into account high-level, cognitively motivated people-centred design goals. We present a precedent-based parametric design method that integrates people-centred design "precedents" rooted in empirical evidence directly within state of the art parametric design systems. As a use-case, we illustrate the general method in the context of an empirical study focusing on the multi-modal analysis of wayfinding behaviour in two large-scale healthcare environments. With this use-case, we demonstrate the manner in which: (1). a range of empirically established design precedents -e.g., pertaining to visibility and navigation- may be articulated as design constraints to be embedded directly within state of the art parametric design tools (e.g., Grasshopper); and (2). embedded design precedents lead to the (parametric) generation of a number of morphologies that satisfy people-centred design criteria (in this case, pertaining to wayfinding). Our research presents an exemplar for the integration of cognitively motivated design goals with parametric design-space exploration methods. We posit that this opens-up a range of technological challenges for the engineering and development of next-generation computer aided architecture design systems.

• Journal of Conservation Science
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• v.34 no.3
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• pp.235-244
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• 2018

The forms of stone cultural properties vary depending on the purpose of construction. In general, pagodas and statues of the Buddha (including the Maebul) are representative of stone cultural properties and demonstrate important aspects of cultural history and scientific technology. The purpose for which cultural properties were constructed may influence construction technologies, so we must carefully think about and clearly understand the purpose of construction, namely the cultural and/or philosophical history, when conducting conservation treatments now. This may be examined through the relationship between "why?" and "how?": Why did the builders construct these stone cultural properties, and how did they use such technologies? We may be deeply impressed by the form and delicacy of the sculpture, which is the "how" aspect of the technologies, but we must also understand the effect of the "why." namely the soul and/or spirit of those who created the properties. The form of stone cultural properties may be influenced by (1) the political-social sphere, (2) religion, or (3) the cultural history of the period, which have changed over time. It is important that this is the view taken in current conservation treatment.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.2
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• pp.1-9
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• 2001

This research chose the existing designed copier zoom lens system and analyzed to calculate the optical capacity. As this lens system was the zoom lens system of finite object point, differed form the general camera zoom lens of infinite object point, it got a limited movement range because it moved between the fixed object and the image. In the result of comparison the optical capacities between a symmetric form and a asymmetric form. We could find out the truth which a asymmetric form constituted comparative stable aberrations and existed a tracks of effort for aberration correction. Therefore, a symmetric form is allotted satisfactorily from improved aberrations by itself in the fixed focal lens system. However, it has a limit of improving for capacity when it is used a zoom lens system got a symmetric form.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.869-879
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• 1995

The new field of learning control develops controllers that learn to improve their performance at executing a given task, based on experience performing this task. The simplest forms of learning control are based on the same concept as integral control, but operating in the domain of the repetitions of the task. In the previous paper, I had studied the use of such controllers in a decentralized system, such as a robot with the controller for each link acting independently. The basic result of the paper is to show that stability of the learning controllers for all subsystems when the coupling between subsystems is turned off, assures stability of the decentralized learning in the coupled system, provided that the sample time in the digital learning controller is sufficiently short. In this paper, we present two examples. The first illustrates the effect of coupling between subsystems in the system dynamics, and the second studies the application of decentralized learning control to robot problems. The latter example illustrates the application of decentralized learning control to nonlinear systems, and also studies the effect of the coupling between subsystems introduced in the input matrix by the discretization of the system equations. The conclusion is that for sufficiently small learning gain, and sufficiently small sample time, the simple learning control law based on integral control applied to each robot axis will produce zero tracking error in spite o the dynamic coupling in the robot equations. Of course, the results of this paper have much more general application than just to the robotics tracking problem. Convergence in decentralized systems is seen to depend only on the input and output matrices, provided the sample time is suffiently small.

• Journal of Korean Library and Information Science Society
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• v.36 no.3
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• pp.137-148
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• 2005

In this paper we outline the evolving process of the cataloguing rules in Korea focused on the standardization. We analyzed the new and updated rules under the KCR4( Korean Cataloguing Rules, 4th edition) in terms of usability of the catalogue. Our findings can be summarized as follows: 1) Since there are the rules of the unlimited number of the statement of responsibility, the access point is expanded and may bring the high searchability as a result, 2) Since the rules of the general material designations are added, the catalogue users may easily identify the material, 3) Since the rules of the material specific details area are added, the catalogue users may easily understand the characteristics and other features of a publication, 4) The KCR4 seems a kind of the integrated cataloguing rules for diverse types of materials including the monographs, 5) Since the rules of choice and forms of the access point treated in the authority control, there seem some Problems in usability of the catalogue, 6) The concept of the uniform heading is eliminated which seems considered only for the convenience of the cataloguers not for usability of the catalogue.

• Journal of Advanced Navigation Technology
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• v.13 no.3
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• pp.426-431
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• 2009

Recently, the application of E-learning is changing the method that is able to process the learning to learner more efficiently and conveniently. For this purpose, the application research of U-learning that is able to support the learning using mobile device such as PDA, NetBook, Tablet PC and so on is actively processing. But lots of U-learning framework is only considering the change to fit the exist learning contents the mobile device without SCORM that is able to support to make and process the learning contents by regular forms. In this paper, we proposed the learning contents interconnection of U-learning framework considering SCORM. For this purpose, we have to construct the learning by learning object and asset within SCORM. And this method can support learning information that was reconstructed it by learning contents to fit the mobile device as used the mobile device meta-data.

• Journal of Korean Society of Steel Construction
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• v.27 no.1
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• pp.1-12
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• 2015

Well-designed bolted connections can exhibit excellent ductile behavior through bearing mechanism until the occurrence of bolt shear rupture. The ultimate strength analysis of eccentric bolted connections is an economical and mechanistic approach which uses such ductility. However, the bolt load-deformation relationship, which forms basis of the current practice, is based on very limited combinations of bolt and steel materials. The primary objective of this study was to establish the general bolt force-deformation relationship based on systematic single-bolt bearing connection tests. The test results showed that the projected area of the bolt hole and the strength and thickness of the plate to be connected are the main factors affecting the force-deformation relationship. The results of this study can be used for the instantaneous center of rotation method (ICRM) to achieve more accurate analysis and economical design of a variety of group-bolted connections subjected to eccentric shear.

• Journal of Ginseng Research
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• v.37 no.1
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• pp.1-7
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• 2013

Ginseng is being distributed in 35 countries around the world and there are differences by each country in the distribution volume and amount. However, since there is no accurate statistics on production and distribution amount by each country, it is very difficult to predict the world ginseng market. Ginseng trading companies and governments are in desperate need of comprehensive data that shows the world ginseng market status for sales and marketing. For that reason, this study will look into the approximate size of the world ginseng market based on recent ginseng distribution amount by each country and production by major ginseng producing nations. In addition, the review sets an opportunity to check the status of ginseng (Korea) in the world and presents future direction by examining recent history of ginseng development in Korea, which is one of the world's largest ginseng distributers. Since ginseng is cultivated in limited areas due to its growth characteristics, ginseng distributing countries can be divided based on whether they grow it domestically or not. In general, four countries including South Korea, China, Canada, and the US are the biggest producers and their total production of fresh ginseng is approximately 79,769 tons which is more than 99% of 80,080 tons, the total ginseng production around the world. Ginseng is distributed to different countries in various forms such as fresh ginseng, dried ginseng, boiled and dried ginseng (Taekuksam), red ginseng and the related products, etc. and is consumed as food, dietary supplements, functional food, medical supplies, etc. Also, the world ginseng market including ginseng root and the processed products, is estimated to be worth $2,084 million. In particular, the size of the Korean market is $1,140 million which makes Korea the largest distributer in the world. Since the interests in alternative medicine and healthy food is increasing globally, the consumer market of ginseng with many features and the processed products are expected to expand continuously.