• KSII Transactions on Internet and Information Systems (TIIS)
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• 제18권7호
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• pp.1868-1887
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• 2024

Recommendation systems research is a subfield of information retrieval, as these systems recommend appropriate items to users during their visits. Appropriate recommendation results will help users save time searching while increasing productivity at work, travel, or shopping. The problem becomes more difficult when the items are geographical locations on the ground, as they are associated with a wealth of contextual information, such as geographical location, opening time, and sequence of related locations. Furthermore, on social networking platforms that allow users to check in or express interest when visiting a specific location, their friends receive this signal by spreading the word on that online social network. Consideration should be given to relationship data extracted from online social networking platforms, as well as their impact on the geolocation recommendation process. In this study, we compare the similarity of geographic locations based on their distance on the ground and their correlation with users who have checked in at those locations. When calculating feature embeddings for users and locations, social relationships are also considered as attention signals. The similarity value between location and correlation between users will be exploited in the overall architecture of the recommendation model, which will employ graph convolution networks to generate recommendations with high precision and recall. The proposed model is implemented and executed on popular datasets, then compared to baseline models to assess its overall effectiveness.

• 분석과학
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• 제37권4호
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• pp.201-210
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• 2024

Surface-enhanced Raman scattering (SERS) has emerged as a powerful technique for detecting and analyzing chemical and biological molecules at ultra-low concentrations. The effectiveness of SERS largely depends on structures with sub-10 nm gaps, prompting the proposal of various nanostructures as efficient SERS-active platforms. Among these, single-crystalline gold nanowires (AuNWs) are particularly promising due to their large dielectric constants, well-defined geometries, atomically smooth surfaces, and surface plasmon resonance across the visible spectrum, which produce strong SERS enhancements. This review comprehensively explores the synthesis, functionalization, and application of Au NWs in SERS. We discuss various methods for synthesizing AuNWs, including the vapor transport method, which influences their morphological and optical properties. We also review practical applications in chemical and biosensing, showcasing the adaptability of Au NWs-based SERS platforms in detecting a range of analytes, from environmental pollutants to biological markers. The review concludes with a discussion on future perspectives that aim to enhance sensor performance and broaden application domains, highlighting the potential of these sensors to revolutionize diagnostics and environmental monitoring. This review underscores the transformative impact of AuNW-based SERS sensors in analytical chemistry, environmental science, and biomedical diagnostics, paving the way for next-generation sensing technologies.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권6호
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• pp.2463-2482
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• 2016

Cloud services are often provisioned to their customers using user-friendly web browsers with flexible and rich plug-in environments. Delay is one of the fundamental performance metrics of these web-based services. Commonly-used network measurement tools usually only measure network delay and it may be difficult to infer the web-delay performance using only network layer measurement approaches. In this paper, we propose to evaluate the application layer delay in a browser-based network measurement platform using engineered scripts. We conducted a delay measurement study using instrumented scripts in the proposed browser-based measurement platform. Our investigation included a comparison study of three browser-scripting delay measurement methods, including Java applet, JSP and Flash ActionScript. We developed a browser-based delay measurement testbed over the Internet so that different delay measurement tools could be evaluated in the same real network environment including typical Internet paths and the Baidu cloud. We also decomposed the components of the end-to-end delay process of the above measurements to reveal the difference and relationship between the network-layer delay and the application-layer delay. Our measurement results characterize the stochastic properties of the application-layer delay over real Internet paths, and how these properties vary from the underlying network layer delay. This browser-scripting measurement approach can be easily deployed on different cloud service platforms to inspect their application-layer delay performance between end clients and the cloud platforms. Our measurement results may provide insights into designing new cloud services with enhanced quality-of-experience perceived by cloud users.

• JSTS:Journal of Semiconductor Technology and Science
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• 제15권1호
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• pp.48-59
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• 2015

In recent years, there are increasing threats of rootkits that undermine the integrity of a system by manipulating OS kernel. To cope with the rootkits, in Vigilare, the snoop-based monitoring which snoops the memory traffics of the host system was proposed. Although the previous work shows its detection capability and negligible performance loss, the problem is that the proposed design is not acceptable in recent commodity mobile application processors (APs) which have become de facto the standard computing platforms of smart devices. To mend this problem and adopt the idea of snoop-based monitoring in commercial products, in this paper, we propose a snoop-based monitor design called S-Mon, which is designed for the AP platforms. In designing S-Mon, we especially consider two design constraints in the APs which were not addressed in Vigilare; the unified memory model and the crossbar switch interconnect. Taking into account those, we derive a more realistic architecture for the snoop-based monitoring and a new hardware module, called the region controller, is also proposed. In our experiments on a simulation framework modeling a productionquality device, it is shown that our S-Mon can detect the rootkit attacks while the runtime overhead is also negligible.

• 디지털융복합연구
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• 제11권11호
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• pp.795-801
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• 2013

과거의 오프라인에서만 이루어졌던 생활이 온라인에서의 활동으로 발전함으로 인해 온라인상에서 사용자가 올바른 사용자인지의 여부는 중요한 문제이다. 온라인상이나 나아가 일반 생활에서도 사용자 인증을 보다 정확하게 하기 위하여 생체인식 기술을 도입하고 있다. 생체인식 기술은 개인의 고유한 특징을 이용하여 인증을 수행하는 방법으로 비밀번호를 대체하는 차세대 인증 기술로 각광받고 있다. 인간의 고유한 특징의 종류는 매우 다양하며 이러한 특징을 추출하는 생체인식 기술도 다양한 장치와 알고리즘을 이용하여 이루어진다. 본 논문에서는 첫째로 이러한 다양한 장치인 스마트폰, 스마트와치, M2M 플랫폼을 분석하고 적용하였을 경우 어떤 효용성이 있는지 분석한다. 둘째로, 다른 장치 플랫폼에서 포괄적인 인증인 효용성기반의 AIB를 제안한다. 제안 인증기법은 신체정보를 이용한 효율적인 인증을 포함한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1433-1435
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• 2003

Very decisive progress was made in advancing fundamental POL-IN-SAR theory and algorithm development during the past decade. This was accomplished with the aid of airborne & shuttle platforms supporting single -to-multi-band multi-modal POL-SAR and also some POL-IN-SAR sensor systems, which will be compared and assessed with the aim of establishing the hitherto not completed but required missions such as tomographic and holographic imaging. Because the operation of airborne test-beds is extremely expensive, aircraft platforms are not suited for routine monitoring missions which is better accomplished with the use drones or UAVs. Such unmanned aerial vehicles were developed for defense applications, however lacking the sophistic ation of implementing advanced forefront POL-IN-SAR technology. This shortcoming will be thoroughly scrutinized resulting in the finding that we do now need to develop most rapidly POL-IN-SAR drone-platform technology especially for environmental stress-change monitoring with a great variance of applications beginning with flood, bush/forest-fire to tectonic-stress (earth-quake to volcanic eruptions) for real-short-time hazard mitigation. However, for routine global monitoring purposes of the terrestrial covers neither airborne sensor implementation - aircraft and/or drones - are sufficient; and there -fore multi-modal and multi-band space-borne POL-IN-SAR space-shuttle and satellite sensor technology needs to be further advanced at a much more rapid phase. The existing ENVISAT with the forthcoming ALOSPALSAR, RADARSAT-2, and the TERRASAT will be compared, demonstrating that at this phase of development the fully polarimetric and polarimetric-interferometric modes of operation must be viewed and treated as preliminary algorithm verification support modes and at this phase of development are still not to be viewed as routine modes.

• 트랜스-
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• 제9권
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• pp.67-92
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• 2020

소셜플랫폼과 기술의 발전 덕분에 온라인 커뮤니케이션이 일상화 되면서 자신의 감정, 생각, 경험 등을 인터넷에 표현하는 것은 지극히 일반적인 일상이 되었다. 특히 SNS는 자신을 쉽게 표현하는 동시에 다른 이용자들과 교류할 수 있는 대표적 플랫폼이다. 개인의 소소한 일상부터 무엇을 하고 어떤 경험을 했는지 SNS로 소통하는 방식이 보편화되었다. 이에 따라 미술관은 관람객들의 참여와 관심을 끌어내기 위해 다양한 시도를 하고 있다. 관람객들을 끌어들여 놀이와 학습을 동시에 즐길 수 있는 콘텐츠 기반의 프로그램 및 환경을 제공하고 있다. 본 논문은 신기술의 발전과 이를 수용한 미술관 환경의 변화와 함께 단순한 감상에 그치지 않고 일상의 소통방식이 미술관 관람에서도 어떻게 나타나는가를 탐색할 것이다. 이를 통해 SNS을 비롯한 모바일 기반 소통이 미술관 관람의 질적 다양성을 제공하고, 의미있는 미술관 경험으로 완성될 수 있으며, 이에 따른 경험의 플랫폼으로서 미술관, 더 나아가 기술수용에 따른 문화예술기관의 다양한 역할과 기능을 제시하고자 한다.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.253-258
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• 2021

This study aims to expose the potential dangers of K-pop through the past and present of K-pop choreography copyrights and to suggest the need to secure digital choreography copyrights for the sustainability of K-pop considering national responsibility. As the content industry quickly sought countermeasures to digital transformation, such as the launch of K-pop platforms and the evolution of OMO (Online Merges with Offline) media commerce in response to changes in the industrial environment due to COVID-19, the annual export of the domestic content industry increased by 6.3% compared to the previous year. Accordingly, our copyright does not require that works be fixed in tangibles, as in Japan and Germany, on the basis of entrusting each country's legislation to determine whether to require fixation on choreographed works. On the other hand, the United States, France and the United Kingdom are demanding that it be fixed. Although choreography is at the center of K-pop and the value and influence of K-pop videos including cover dance through new media are discussed from various perspectives, copyright on choreography that needs to be resolved in business platforms for K-pop scalability The fact that there is such a big difference in problem perception is an area where we must not lose our vigilance. As the development of today's technology, the method of fixing a choreography looks very easy as an image, but at the same time can be stolen very quickly. Therefore, compared to overseas cases, it is urgent to improve the difference in perception of copyright registration for K-pop choreography and to supplement the system include the NFT.

• 한국콘텐츠학회논문지
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• 제21권6호
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• pp.138-154
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• 2021

온라인 생방송을 통해 실시간으로 판매 및 구매 활동이 이루어지는 '라이브커머스'라는 새로운 형태의 전자상거래 시장이 폭발적인 성장세를 보이고 있다. 본 연구는 기술 수용 이론에 기초하여 중국 최대의 라이브커머스 플랫폼인 <타오바오 라이브>의 의사사회적 상호작용성, 방송 앵커의 특성(신뢰성, 매력성, 전문성), 지각된 사용용이성과 유용성, 타오바오 라이브를 통한 지속적 쇼핑 의도 간의 관계를 탐구하였다. 총 536명의 타오바오 라이브 시청자를 대상으로 설문조사를 실시한 결과, 의사사회적 상호작용성은 타오바오 라이브에 대한 지각된 사용용이성과 유용성에 긍정적인 영향을 미쳤으나, 앵커의 특성(신뢰성, 매력성, 전문성)은 지각된 유용성에 유의한 영향을 미치지 않는 것으로 나타났다. 나아가 지각된 사용용이성이 높을수록 지각된 유용성 또한 증가하였으며, 사용용이성과 유용성은 모두 타오바오를 통한 지속적 쇼핑 의도에 긍정적인 영향을 끼쳤다. 본 연구는 중국의 라이브커머스 플랫폼의 지속적 발전을 위한 이론적 자원을 제공하고, 전자상거래 기업의 운영방식에 새로운 가능성과 전략을 제시한다는 점에서 의미가 있다.

• 한국IT서비스학회지
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• 제22권1호
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• pp.75-93
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• 2023

The game industry has grown not only by combining them with various technologies also introducing new types of business models such as P2P, F2P, and P2W. Furthermore, games which implemented X2E model with blockchain technology are recently in the spotlight of the public attention. As domestic game companies have also prospect the blockchain games feasible, they are seeking ways to expand their global market share by strengthening the X2E model. Hence, by carrying this new business model out, it is expected to diversify their global revenue stream, which was previously confined to Asia region. This study analyzed the case of companies that have implemented the P2E and C2E models in order to suggest the direction of development for the game platform in Web 3.0 era. The cases of P2E game platform, which constitute of Axie Infinity and Mir 4, encompass the compensation structure, the stabilization mechanism of the in-game token economy, and future strategies regarding blockchain gaming. Likewise, the platform structure, business model, and future growth potential was discussed in terms of C2E scheme, focusing on the ZEPETO and Roblox cases. Based on the above case analysis, this study attempted to provide information on the current limitations and development directions of the P2E and C2E platforms. The current limitations in legal and industrial aspects should be addressed to facilitate the blooming of blockchain and P2E game industry. In addition, the necessity of not only social support also improvement on the technology and social stigma of full-time creators is ought to be emphasized in an effort to encourage the development of C2E platforms.