• 한국콘텐츠학회논문지
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• 제19권7호
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• pp.393-401
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• 2019

본 연구에서는 HMD의 해상도가 높아질수록 수용자의 실재감과 몰입감이 더욱 강화될 것이고, 프레즌스 경험 정도 역시 증가할 것이라는 일반적 추론에 근거하여 가상현실 디바이스의 해상도에 따른 프레즌스 경험 정도의 차이를 실증적으로 검증하고 어떠한 프레즌스 효과가 나타나는지를 확인하고자 하였다. 이를 위해 대학생 300명을 모집단으로 하고, Oculus 스토어의 VR 시뮬레이션 영상물을 자극물로 해상도(HD, FHD, WQHD)가 각기 다른 HMD와 모바일 디바이스를 활용하여 연구를 진행하였다. 연구결과, 가상현실 HMD에 부착된 모바일 디바이스의 해상도에 따른 수용자의 프레즌스 경험 정도는 유의미한 차이가 있었고, 프레즌스 효과에서는 각성에서 유의미한 영향력을 확인할 수 있었다. 반면 감동효과에서는 유의미한 영향력을 확인할 수 없었다. 따라서 가상현실 디바이스의 해상도가 높을수록 수용자의 프레즌스 경험 정도를 증가시킨다는 일반적인 추론적 가설을 증명할 수 있었지만 프레즌스 효과 측면에서는 각성과 감동에서 상반된 연구결과가 나타났기 때문에 보다 확실한 효과의 차이를 규명하기 위한 추가적인 실험연구가 요구된다.

• 한국의류학회지
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• 제42권5호
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• pp.855-870
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• 2018

This study analyzes and categorize the types of digital signage content using the case study method as well as explores the moderating effects of digital signage content in the relationship between digital signage attributes and consumer's flow using the empirical study method. For a case study, the total of 38 fashion brands, including 10 designer brands, 14 sports and outdoor brands, 6 casual brands and 8 SPA brands were investigated. For an empirical study, the virtual store with two types of digital signage contents was developed. Then, the online survey was conducted with 20s to 40s respondents and a total of 544 responses were analyzed using SPSS 24.0. The study results were as follows. First, digital signage in fashion store were categorized into four types by its content; brand-centric type, product-centric type, compound type, and promotional type. Second, digital signage consists of three attributes such as attractiveness, informativity, and entertainment. Third, the results showed that attractiveness and entertainment had a significant effect on consumer's flow. The type of digital signage content was also shown to moderate the influence of attractiveness and consumer's flow.

• 한국의류학회지
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• 제36권12호
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• pp.1318-1329
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• 2012

In-store atmospherics involve quantified physical and social aspects; however, the social quality of a web-based retailing context has largely been under-examined. This study addressed some antecedents and consequences of social ambience in virtual shopping (or e-social ambience) within a web-based U.S. retailing fashion context. This study explored the role of social cues as a viable antecedent to e-social ambience and emotions as its consequence. A conceptual framework was built postulating the effect of social cue for web content, on e-social ambience, emotions, and e-shopping enjoyment. The experimental results (n=488) on a fictitious retail T-shirt website confirmed the positive correlation among the variables; in addition, the level of social cues included within the web content significantly increased the level of customer-perceived e-social ambience of the website and subsequent positive on-site emotions. On-site emotions positively influence purchase intentions. The results expand the current understanding of e-store management by providing novel insight relevant to fashion companies that wish to provide customers with a quality website shopping experience.

• 전자공학회논문지S
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• 제35S권7호
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• pp.95-102
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• 1998

This paper proposes a synchronization method of synthetic facial iamge sequences and synthetic speech. The LP-PSOLA synthesizes the speech for each demi-syllable. We provide the 3,040 demi-syllables for unlimited synthesis of the Korean speech. For synthesis of the Facial image sequences, the paper defines the total 11 fundermental patterns for the lip shapes of the Korean consonants and vowels. The fundermental lip shapes allow us to pronounce all Korean sentences. Image synthesis method assigns the fundermental lip shapes to the key frames according to the initial, the middle and the final sound of each syllable in korean input text. The method interpolates the naturally changing lip shapes in inbetween frames. The number of the inbetween frames is estimated from the duration time of each syllable of the synthetic speech. The estimation accomplishes synchronization of the facial image sequences and speech. In speech synthesis, disk memory is required to store 3,040 demi-syllable. In synthesis of the facial image sequences, however, the disk memory is required to store only one image, because all frames are synthesized from the neutral face. Above method realizes synchronization of system which can real the Korean sentences with the synthetic speech and the synthetic facial iage sequences.

• International Journal of Internet, Broadcasting and Communication
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• 제14권4호
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• pp.121-131
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• 2022

We look at the initial stage of Meta (previous Facebook)'s new metaverse platform and investigate its platform design in pre-launch and ignition life stage. From the Rocket Model (RM)'s theoretical logic, the results reveal that Meta firstly focuses on investing in key content developers by acquiring virtual reality (VR), video, music content firms and offering production support platform of the augmented reality (AR) content, 'Spark AR' last three years (2019~2021) for attracting high-potential developers and users. In terms of three matching criteria, Meta develops an Artificial Intelligence (AI) powered translation software, partners with Microsoft (MS) for cloud computing and AI, and develops an AI platform for realistic avatar, MyoSuite. In 'connect' function, Meta curates the game concept submitted by game developers, welcomes other game and SNS based metaverse apps, and expands Horizon Worlds (HW) on VR devices to PCs and mobile devices. In 'transact' function, Meta offers 'HW Creator Funding' program for metaverse, launches the first commercialized Meta Avatar Store on Meta's conventional SNS and Messaging apps by inviting all fashion creators to design and sell clothing in this store. Mata also launches an initial test of non-fungible token (NFT) display on Instagram and expands it to Facebook in the US. Lastly, regarding optimization, especially in the face of recent data privacy issues that have adversely affected corporate key performance indicators (KPIs), Meta assures not to collect any new data and to make its privacy policy easier to understand and update its terms of service more user friendly.

• 한국융합학회논문지
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• 제9권8호
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• pp.143-148
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• 2018

본 연구는 오큘러스(Oculus)의 오큘러스 스토어(Oculus Store)와 에프엑스기어(FXGEAR)의 눈 VR 스토어(NOON VR Store)를 중심으로 VR 서비스 플랫폼에 관하여 분석하고 고찰하여 어떤 차이가 있는지를 연구하였다. 1차로 문헌연구를 통해 VR 시장의 현황 및 전망 등을 고찰하였고 VR 서비스 플랫폼에 관한 사례조사를 하였다. 또한, 플랫폼의 사용성 평가의 지표가 되는 안드레이 학주와 히라노 아쓰시의 플랫폼 전략에 대해 이론적 고찰을 선행하였다. 2차로 VR 서비스 플랫폼인 오큘러스의 오큘러스 스토어와 에프엑스기어의 눈 VR 스토어를 중심으로 VR 서비스 플랫폼의 사용성을 조사하기 위해 대학교육 이상의 피실험자들을 대상으로 심층 인터뷰를 진행하였다. 본 연구의 결과는 추후 VR 서비스 플랫폼을 구성하는데 디자인 가이드라인으로 활용 할 수 있으며 사용자 경험 연구에 활용될 수 있을 것으로 기대한다.

• Journal of Electrical Engineering and Technology
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• 제13권5호
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• pp.1935-1944
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• 2018

With the increase of the production of energy from renewable, it becomes important to look at techniques to store this energy. Therefore, a single winding bearingless flywheel motor (SWBFM) specially for flywheel energy storage system is introduced. For the control system of SWBFM, coupling between the torque and the suspension subsystems exists inevitably. It is necessary to build a reasonable radial force mathematical model to precisely control SWBFM. However, SWBFM has twelve independently controlled windings which leads to high-order matrix transformation and complex differential calculation in the process of mathematical modeling based on virtual displacement method. In this frame, a Maxwell tensor modeling method which is no need the detailed derivation and complex theoretical computation is present. Moreover, it possesses advantages of universality, accuracy, and directness. The fringing magnetic path is improved from straight and circular lines to elliptical line and the rationality of elliptical line is verified by virtual displacement theory according to electromagnetic torque characteristics. A correction function is taken to increase the model accuracy based on finite element analysis. Simulation and experimental results show that the control system of SWBFM with radial force mathematical model based on Maxwell tensor method is feasible and has high precision.

• 대한임베디드공학회논문지
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• 제6권3호
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• pp.190-200
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• 2011

Android platform provides a content provider and a cursor mechanism to access the internal SQLite engine. Content providers not only store and retrieve data but also make it accessible to applications. Applications can only share data through content provider, since there's no common storage area that Android packages can access. Cursor is an interface that provides random read-write access to the result set returned by a database query. However, this cursor possesses two major limitations. First, a cursor does not support a join clause among cursors, since the cursor can only access a single table in the content provider. Second, the cursor is not capable of creating user-customized field in the predefined content providers. In this paper, we propose the unified cursor architecture that merges several cursors into a single virtual cursor. Cursor translation look-aside buffer (TLB), column windowing mechanism and virtual data management are the three major techniques we have adopted to implement our structure. And we also propose a delayed synchronization method between an application and a proposed unified cursor. An application can create a user-customized field and sort multiple tables using a unified cursor on Android platform.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권8호
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• pp.2801-2815
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• 2022

With the advent and realization of Software Defined Network (SDN) architecture, many organizations are now shifting towards this paradigm. SDN brings more control, higher scalability, and serene elasticity. The SDN spontaneously changes the network configuration according to the dynamic network requirements inside the constrained environments. Therefore, a monitoring system that can monitor the physical and virtual entities is needed to operate this type of network technology with high efficiency and proficiency. In this manuscript, we propose a real-time monitoring system for data collection and visualization that includes the Prometheus, node exporter, and Grafana. A node exporter is configured on the physical devices to collect the physical and virtual entities resources utilization logs. A real-time Prometheus database is configured to collect and store the data from all the exporters. Furthermore, the Grafana is affixed with Prometheus to visualize the current network status and device provisioning. A monitoring system is deployed on the physical infrastructure of the KOREN topology. Data collected by the monitoring system is further pre-processed and restructured into a dataset. A monitoring system is further enhanced by including machine learning techniques applied on the formatted datasets to identify the elephant flows. Additionally, a Random Forest is trained on our generated labeled datasets, and the classification models' performance are verified using accuracy metrics.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.270-278
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• 2023

We propose a container orchestration system for process workloads that combines the potential of big data and machine learning technologies to integrate enterprise process-centric workloads. This proposed system analyzes big data generated from industrial automation to identify hidden patterns and build a machine learning prediction model. For each machine learning case, training data is loaded into a data store and preprocessed for model training. In the next step, you can use the training data to select and apply an appropriate model. Then evaluate the model using the following test data: This step is called model construction and can be performed in a deployment framework. Additionally, a visual hierarchy is constructed to display prediction results and facilitate big data analysis. In order to implement parallel computing of PCA in the proposed system, several virtual systems were implemented to build the cluster required for the big data cluster. The implementation for evaluation and analysis built the necessary clusters by creating multiple virtual machines in a big data cluster to implement parallel computation of PCA. The proposed system is modeled as layers of individual components that can be connected together. The advantage of a system is that components can be added, replaced, or reused without affecting the rest of the system.