• Korean Journal of Organic Agriculture
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• v.12 no.1
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• pp.23-44
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• 2004

TCA(Total Cost Assessment) can be defined by a tool to evaluate actual profit about investment. Also, It can be used by method to make more reasonable decision-making in business. Enforcement of 'direct payment system' for environment friendship farmhouse of government is spreading recent times. But, it is true that it is no definite standard about appropriation of disbursement amount of money. TCA method can be utilized usefully for solution of these problem. Also, It will help to decide price grasping invisible cost and environment cost. Therefore, We tried that may can apply TCA theory in farmhouse class, and attempted economic performance estimation which use this. This study introduces TCA theory and developed applicable expense list in agriculture field. Also, We applied TCA theory to farmhouse. This theories referenced domestic and th6 foreign countries, connection literature. But, It handled part about invisible cost and social cost etc..

• Proceedings of the Korea Inteligent Information System Society Conference
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• 1999.03a
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• pp.519-523
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• 1999

본 연구는 디지털 이미지 데이터에 대한 창작자의 저작권 보호 기술인 watermarking 기술을 연구하였다. 저작권 보호를 위한 정보를 invisible watermark로 삽입하였고, watermarking된 칼라 이미지를 데이터 압축, Filtering, cropping 등과 같은 여러 가지 외부 공격에 대한 내구성을 실험하였다. Invisible watermark를 삽입하기 위하여 변형된 주파수 변환기법을 이용하였으며, 기존의 PRN(pseudo random number)방법보다 가시성이 뛰어난 이미지 형태의 로고를 삽입하여 저작권에 대한 확증성을 제고하였다.

• Proceedings of the IEEK Conference
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• 2002.07c
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• pp.1897-1900
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• 2002

This paper proposes a novel computer-human interface, named invisible Messenger. It integrates face detection and tracking, and speaker array signal processing. By speaker array it is possible to form acoustic focus at the arbitrary location that is measured by the face tracking. Thus the proposed system can whisper in a person's ear as if an invisible virtual messenger were standing by the person. Not only speculative discussion, the authors have implemented a working prototype system based upon the proposed idea. This paper also describes about this prototype. In order to confirm effectiveness of the proposed idea, the authors conduct experiments using the implemented system. Experimental results demonstrate the effectivenss of the proposed idea.

• Journal of Auto-vehicle Safety Association
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• v.13 no.3
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• pp.60-68
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• 2021

Invisible passenger airbag door system of hard panel types must be designed with a weakened area such that the side airbag will deploy through the instrument panel as like intended manner, with no flying debris at any required operating temperature. At the same time, there must be no cracking or sharp edges in the head impact test. If the advanced airbag with the big difference between high and low deployment pressure ranges are applied to hard panel types of invisible passenger airbag (IPAB) door system, it becomes more difficult to optimize the tearseam strength for satisfying deployment and head impact performance simultaneously. It was introduced the 'Operating Window' idea from quality engineering to design the hard panel types of IPAB door system applied to the advanced airbag for optimal deployment and head impact performance. Zigzab airbag folding and 'n' type PAB mounting bracket were selected.

• Journal of the Korea Society of Computer and Information
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• v.16 no.10
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• pp.175-183
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• 2011

Performance of digital video watermarking is an assessment that hides a lot of information in digital videos. Therefore, it is required to find a way that enables to store lots of bits of data into a high quality video of the frequency area of digital contents. Hence, this paper designs a watermarking system improving security with an enhancing watermarking based on invisible watermarking and embedding an watermarking on LH and HL subband and its subband by transforming wavelet after the extraction of luminance component from the frames of video by compromising robustness and invisible of watermarking elements. The performance analysis of security of watermarking is carried out with a statistic method, and makes an assessment of robustness against variety of attacks to invisible watermarking. We can verify the security of watermarking against variety of attacks by testing robustness and invisible through carrying out general signal processing like noise addition, lossy compression, and Low-Pass filtering.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.05a
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• pp.275-280
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• 2007

The modern society of the 21century is becoming a discussion as spaces appearing as ambiguous boundaries caused by complexed cultural phenomenon. As for the spacial factors we recognize, which appears as phenomenon in which is emphasizing the existing system of cognizance and thinking through drawing inviable parts of the effort within escaping the limits of gravity. This Merleau-Ponty and Gilles Deleuze refines it as theories called "Perception" and "Sense", and through the 'visible and invisible' of Merleau-Ponty and the 'Nonsense and paradox' of Gilles Deleuze, this study object is forming these inviable representations into space. Using the similarities of these two theories as a tool, we will analyze the examples of space with drawing the force that forms invisibility into embodiment, building a possibility of improvement in future spaces.

• Nuclear Engineering and Technology
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• v.52 no.4
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• pp.856-862
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• 2020

Defect inspection system for industrial applications takes the important portion. Non-destructive inspection method has been significantly improved. Infrared thermography, as one of method for non-destructive inspection, can provide relatively precise data and quick inspection time. This study, it was performed to measure defect according to the measurement limit of the non-visible areas such as the back surface of the pipe using reflection plate using reflection plate based on Infrared thermography. The materials of the reflection plate were determined in consideration of the space limitation and the thermal characteristics, and defects were detected by the manufactured reflection plate. Detection of defect in non-visible area using the candidate materials for reflection plate was conducted.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.3
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• pp.1325-1329
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• 2012

This study suggests an indoor screen shooting system that can be connected with diverse graphic contents, through developing a gun only for indoor shooting and developing high-speed laser recognition algorithm. The dedicated gun has strong durability and was applied pneumatic solenoid valve control and invisible laser. The aim is to commercialize the indoor screen shooting system by developing a method of interacting with graphic engine through recognizing invisible laser at high speed.

• Journal of information and communication convergence engineering
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• v.18 no.2
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• pp.94-99
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• 2020

Real cyberterrors are invisible and difficult to identify. Even after a cyberattack, its origin and cause are difficult to determine. Cyberterrorism results in invisible cyberwars, and it is believed that World War IV will begin with a cyberwarfare. For national cybersecurity, information on cybersecurity must be collected, shared, and disseminated. In this study, we investigate a blockchain system designed based on the World Cybersecurity Agreement. National cybersecurity information is linked to the hyperledger blockchain system network through the National Cybersecurity Center. National cybersecurity information designs and uses a secure protocol for protection; further, it is collected, shared, and disseminated to treaty countries. National cybersecurity information is shared and spread by the hyperledger blockchain system, and it uses a cyberdefense system that responds to the cyberattacks and their origin. This paper serves as a policy and legislation guideline for forming a World Cybersecurity Agreement between countries.

• Journal of Korea Society of Digital Industry and Information Management
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• v.5 no.4
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• pp.161-168
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• 2009

There are many research for efficient, robust and invisible watermarking system that protects the digital contents like a image and animation according to growth of IT industry. First of all, frequency domain watermarking system like DWT(Descrete Wavelet Transform) is excellent because of minimum loss of original image and robustness of external attack. But, if we raise the insertion strength of watermark, then blazing of image occurs on existing DWT watermarking system and we should have a regular square image. In this study, we research the overflow check for preventing image from blazing and a robust and invisible watermarking algorithm. And we research a free-size DWT watermarking system using padding bytes, without a dependency of size.