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황이환,이승현,최종성 한국인터넷방송통신학회 2024 International Journal of Internet, Broadcasting an Vol.16 No.1
In this paper, we introduce a novel approach to enhance document security by integrating Computer Generated Hologram(CGH) encryption technology with a system for document encryption, printing, and subsequent verification using a smartphone application. The proposed system enables the encryption of documents using CGH technology and their printing on the edges of the document, simplifying document verification and validation through a smartphone application. Furthermore, the system leverages high-resolution smartphone cameras to perform online verification of the original document and supports offline document decryption, ensuring tamper detection even in environments without internet connectivity. This research contributes to the development of a comprehensive and versatile solution for document security and integrity, with applications in various domains.
The Antecedents and Consequences of Customer's Diversion Satisfaction In The Coffeehouse Industry
황진수,이환의,현성협 (사)한국관광레저학회 2012 관광레저연구 Vol.24 No.2
The aim of this study was to identify the antecedents and consequences of diversion satisfaction in the coffeehouse industry. Based on the existing theoretical background, it was proposed that coffeehouse selection attributes form diversion satisfaction, thus influencing well-being perception as well as behavioral intentions. In addition, during this process, two moderators were proposed: (1) brand prestige and (2) involvement. The proposed theoretical relationships were testest using the empirical data collected from 349 coffeehouse patrons. Data analysis results indicate that five types of coffeehouse selection attributes (coffee quality, employee service, physical environment, location, and price) significantly affect customer's diversion satisfaction, which leads well-being perception and behavioral intentions. Also, the moderating role of brand prestige was revealed. Study results provide some meaningful managerial implications for coffeehouse owners in making a marketing strategy.
Performance Evaluation of ARCore Anchors According to Camera Tracking
이신협,황이환,이승현,김태욱,권순철 한국인터넷방송통신학회 2023 International Journal of Internet, Broadcasting an Vol.15 No.4
Augmented reality (AR), which integrates virtual media into reality, is increasingly utilized across various industrial sectors, thanks to advancements in 3D graphics and mobile device technologies. The IT industry is thus carrying out active R&D activities about AR platforms. Google plays a significant role in the AR landscape, with a focus on ARCore services. An essential aspect of ARCore is the use of anchors, which serve as reference points that help maintain the position and orientation of virtual objects within the physical environment. However, if the accuracy of anchor positioning is suboptimal when running AR content, it can significantly diminish the user's immersive experience. We are to assess the performance of these anchors in this study. To conduct the performance evaluation, virtual 3D objects, matching the shape and size of real-world objects, we strategically positioned ourselves to overlap with their physical counterparts. Images of both real and virtual objects were captured from five distinct camera trajectories, and ARCore's performance was analyzed by examining the difference between these captured images.
The Antigenic and Genomic Variation of Human Cytomegalovirus(NHCNV) Isolated in Korea
Eung-Soo Hwang(황응수),Hong-Bock Lee(이흥복),Dong-Gyun Lim(임동균),Ju-Young Seoh(서주영),Chung-Gyu Park(박정규),Jae-Won Park(박재원),Hyun-Soon Jong(정현순),Yoon-Hoh Kook(국윤호),Hoan-Jong Lee(이환종),Byoung-Kook Kim(김병국),Chang- 大韓微生物學會 1994 大韓微生物學會誌 Vol.29 No.6