• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권12호
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• pp.5058-5072
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• 2015

Quaternions have been commonly employed in color image processing, but when the existing pure quaternion representation for color images is used in perceptual hashing, it would degrade the robustness performance since it is sensitive to image manipulations. To improve the robustness in color image perceptual hashing, in this paper a full quaternion representation for color images is proposed by introducing the local image luminance variances. Based on this new representation, a novel Full Quaternion Discrete Cosine Transform (FQDCT)-based hashing is proposed, in which the Quaternion Discrete Cosine Transform (QDCT) is applied to the pseudo-randomly selected regions of the novel full quaternion image to construct two feature matrices. A new hash value in binary is generated from these two matrices. Our experimental results have validated the robustness improvement brought by the proposed full quaternion representation and demonstrated that better performance can be achieved in the proposed FQDCT-based hashing than that in other notable quaternion-based hashing schemes in terms of robustness and discriminability.

• 한국콘텐츠학회논문지
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• 제10권1호
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• pp.372-380
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• 2010

본 연구는 시뮬레이션 기반의 중장기 기술예측 방법론에 대해서 다룬다. 먼저 전문가 집단을 상대로 한 델파이 조사를 통해 미래의 신기술들의 출현 시점과 기술들간의 영향 관계에 대한 데이터를 수집한 후, 취득한 데이터를 활용하여 미래에 개발되어야 하는 신기술들 중에서 핵심기술을 도출하는 새로운 방법론을 제시한다. 일반적인 델파이 조사가 기술 출현에 대한 일정 시점의 예측치만을 제공하는데 반해, 본 연구에서는 시뮬레이션 알고리즘을 통해 기술 출현 시기에 대한 범위를 도출하고, 이를 기초로 핵심기술을 정의한다. 미래에 개발될 기술들의 출현 시점 뿐 만 아니라 핵심 기술에 대한 정보도 함께 도출함으로써, 연구개발 담당자 및 중장기 프로젝트 관리자들에게 자원배분과 관련한 정보를 제공하여 그들의 의사결정을 도울 수 있을 것으로 기대된다.

• 과학기술학연구
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• 제11권1호
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• pp.1-29
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• 2011

이 글에서는 신기술의 사회적 수용과정을 분석 평가하기 위한 틀을 개발하고 그에 입각하여 바이오가스 기술의 수용과정을 분석한다. 분석의 틀에서는 기술 조직 제도의 공진화론에 입각해서 신기술이 사회에 수용되기 위해서는 기술적 경제적 문제만이 아니라 신기술의 사회적 위험에 대한 관리가 이루어져야 한다는 점을 논의할 것이다. 이와 함께 기술 경제적 문제해결을 위한 기술학습활동과 기술의 정당성을 향상시키기 위한 기술정치활동이 필요하다는 점도 강조할 것이다. 다음으로 바이오가스 플랜트 기술의 특성과 개발 운영현황을 살펴본 후, 제시된 분석틀을 활용하여 바이오가스 플랜트 기술의 사회적 수용과정에서 나타나는 문제점을 검토하고 사회적 수용을 촉진하기 위한 방안을 제시한다.

• 기술혁신연구
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• 제3권1호
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• pp.213-236
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• 1995

Advanced Manufacturing Technology(AMT), a comprehensive collection of new technologies for the efficiency and flexibility of manufacturing systems has received a growing attention recently, AMT consists of various industrial and technological components, homogeneous in some aspects while heterogeneous in others. Thus, it is difficult but necessary task to construct a classification framework in which the relationship among individual technologies are depicted in a meaningful fashion. In this, paper, we propose a hierarchical framework in which the objective and criteria of classification are decomposed into three level: industrialization, development and application of AMT. At the first and highest level, the main interest is to "industrialize" AMT. The major actors at this level are policy makers(public sector) and top management(private sector) and the primary classification criterion is the interrelationship between industry and technology. At the middle level exist system engineers whose main objective is to "develop" new technologies and/or systematize individual technologies. At the final and bottom level, shop floor managers need to "apply" AMT in order to enhance the efficiency and flexibility of manufacturing process. It should be stressed that, as a whole, the above three levels should be interactively linked to that each level contributes to the balanced development of AMT.

• International Journal of Computer Science & Network Security
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• 제22권5호
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• pp.204-214
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• 2022

Speedy development has been witnessed in communication technologies and the adoption of the Internet across the world. Information dissemination is the primary goal of these technologies. One of the rapidly developing nations in the Middle East is Saudi Arabia, where the use of communication technologies, including mobile and Internet, has drastically risen in recent times. These advancements are relatively new to the region when contrasted to developed nations. Thus, offenses arising from the adoption of these technologies may be new to Saudi Arabians. This study examines cyber security awareness among Saudi Arabian citizens in distinct settings. A comparison is made between the cybersecurity policy guidelines adopted in Saudi Arabia and three other nations. This review will explore distinct essential elements and approaches to mitigating cybercrimes in the United States, Singapore, and India. Following an analysis of the current cybersecurity framework in Saudi Arabia, suggestions for improvement are determined from the overall findings. A key objective is enhancing the nationwide focus on efficient safety and security systems. While the participants display a clear knowledge of IT, the surveyed literature shows limited awareness of the risks related to cyber security practices and the role of government in promoting data safety across the Internet. As the findings indicate, proper frameworks regarding cyber security need to be considered to ensure that associated threats are mitigated as Saudi Arabia aspires to become an efficient smart nation.

• International journal of advanced smart convergence
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• 제8권1호
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• pp.159-165
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• 2019

'4th Industrial Revolution' is accelerating as a core part of creating new growth engines and enhancing competitiveness of businesses. The fourth industrial revolution means the transformation of society and industries that are brought by IoT (Internet of Things), big data analysis, AI (Artificial Intelligence), and robot technology. Information and Communication Technology (ICT), which is a major factor, is affecting production and manufacturing systems and as ICT technologies become more advanced, intelligent information technology is generally utilized in all areas of society, leading to hyper-connected society where new values are created and developed. ICT technology is not just about connecting devices and systems and making smart, it is about constantly converging and harmonizing new technologies in a number of fields and driving innovation and change. It is no exception to the agro-fisheries trade. In particular, ICT technology is applied to the agricultural sector, reducing labor, providing optimal environment for crops, and increasing productivity. Due to the nature of agriculture, which is a labor-intensive industry, it is predicted that the ripple effects of ICT technologies will become bigger. We are expected to use the Smart Concentration using ICT convergence technology as a useful resource for changing smart farms, and to help develop new service markets.

• Steel and Composite Structures
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• 제30권1호
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• pp.1-12
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• 2019

In this research, an efficient mixed mode I/II fracture criterion is developed for fracture investigation of orthotropic materials wherein crack is placed along the fibers. This criterion is developed based on extension of well-known Maximum Tensile Stress (MTS) criterion in conjunction with a novel material model titled as Equivalent Reinforced Isotropic Model (ERIM). In this model, orthotropic material is replaced with an isotropic matrix reinforced with fibers. A comparison between available experimental observations and theoretical estimation implies on capability of developed criterion for predicting both crack propagation direction and fracture instance, wherein the achieved fracture limit curves are also compatible with fracture mechanism of orthotic materials. It is also shown that unlike isotropic materials, fracture toughness of orthotic materials in mode $I(K)_{IC}{\mid})$ cannot be introduced as the maximum load bearing capacity and thus new fracture mechanics property, named here as maximum orthotropic fracture toughness in mode $I(K_{IC}{\mid}^{ortho}_{max})$ is defined. Optimum angle between crack and fiber direction for maximum load bearing in orthotropic materials is also defined.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2008년도 추계학술대회 및 정기총회
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• pp.157-161
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• 2008

In this paper, we propose a new framework for identifying emerging technologies to in mobile telecommunication industry. We designed a new framework using qualitative and quantitative methodologies. Finally, we deduced emerging technologies using our framework for mobile network operator.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1707-1713
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• 2007

If GNSS-based location information, expected to become the mainstream of the future technology, is applied to the future transportation, it will be of benefit to as follows; cost reducing effects on operating expanse and constructing expense due to decrease of ground unit installation, development of new technologies for train, or vehicle control system and becoming a front runner in the market. Therefore, this paper provides the minimum requirements for GNSS based system thru the studies on the applicability of GNSS based system to railway system, distinctions of the new technology between the existing technologies, and location accuracy.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2009년도 학술발표대회
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• pp.227-228
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• 2009

This study was performed to develop a new PET yarn having the new appearance and touch effect of polyester (PET) yarn, using spinning and texturing technologies. The spinning technology is the manufacturing technology resulting in the denier difference in yarn filaments, and the texturing technology is the texturing conditions leading to spun yarn effects, using the filaments from the spinning processing.