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International Conference on Physiological Computing Systems, PhyCS 2014

作者： Omata, Masaki Kagoshima, Satoshi Suzuki, Yasunari Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Takeda Kofu Japan Department of Computer Science and Media Engineering University of Yamanashi Takeda Kofu Japan

ISBN: (纸本)9789897580062

This paper describes that the number of blood-volume pulses (BVP) and the level of skin conductance (SC) increased more with increasing immersive impression with a view control method using eyelid electromyo-graphy in virtual environment (VE) than those with a mouse control method. We have developed the view control method and the visual feedback associated with electromyography (EMG) signals of movements of user's eyelids. The method provides a user with more immersive experiences in a virtual environment because of strong relationship between eyelid movement and visual feedback. This paper reports a physiological evaluation experiment to compare it with a common mouse input method by measuring subjects' physiological data of their fear of an open high place in a virtual environment. Based on the results, we find the eyelid-movement input method improves the user's immersive impression more significantly than the mouse input method. Copyright © 2014 SCITEPRESS - science and Technology Publications. All rights reserved.

关键词： Virtual reality

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MoRe-Fi: Motion-robust and Fine-grained Respiration Monitoring via Deep-Learning UWB Radar 21

MoRe-Fi: Motion-robust and Fine-grained Respiration Monitori...

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19th ACM Conference on Embedded Networked Sensor Systems, SenSys 2021

作者： Zheng, Tianyue Chen, Zhe Zhang, Shujie Cai, Chao Luo, Jun School of Computer Science and Engineering Nanyang Technological University Singapore Singapore Energy Research Institute Interdisciplinary Graduate Programme Nanyang Technological University Singapore Singapore China-Singapore International Joint Research Institute Guangzhou China

ISBN: (纸本)9781450390972

Crucial for healthcare and biomedical applications, respiration monitoring often employs wearable sensors in practice, causing inconvenience due to their direct contact with human bodies. Therefore, researchers have been constantly searching for contact-free alternatives. Nonetheless, existing contact-free designs mostly require human subjects to remain static, largely confining their adoptions in everyday environments where body movements are inevitable. Fortunately, radio-frequency (RF) enabled contact-free sensing, though suffering motion interference inseparable by conventional filtering, may offer a potential to distill respiratory waveform with the help of deep learning. To realize this potential, we introduce MoRe-Fi to conduct fine-grained respiration monitoring under body movements. MoRe-Fi leverages an IR-UWB radar to achieve contact-free sensing, and it fully exploits the complex radar signal for data augmentation. The core of MoRe-Fi is a novel variational encoder-decoder network;it aims to single out the respiratory waveforms that are modulated by body movements in a non-linear manner. Our experiments with 12 subjects and 66-hour data demonstrate that MoRe-Fi accurately recovers respiratory waveform despite the interference caused by body movements. We also discuss potential applications of MoRe-Fi for pulmonary disease diagnoses. © 2021 ACM.

关键词： Decoding

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A multi-agent system to learn literature ontology: An experiment on English Quran corpus

A multi-agent system to learn literature ontology: An experi...

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2011 2nd International Conference on Intelligent Agent and Multi-Agent Systems, IAMA 2011

作者： Petiwala, Aliabbas Jabirali Siva Sathya, S. Interdisciplinary Programme Education Technology Dept. Indian Institute of Technology Bombay India Computer Science Dept. School of Engineering and Technology Pondicherry University India

ISBN: (纸本)9781457708787

This paper proposes a Multiple-Agent system to construct an ontology of the English translations of the meanings of Noble Quran. None of the current agent based systems have solved the problem of ontology learning from text documents. The Noble Quran has an unconventional style of discourse containing recurring themes and a plethora of versatile figures of speech making it an inimitable and unique literature. An array of Intelligent Agent instances help in automate the task of ontology learning. The existing vocabulary, concordances, and Index of the Quran which are readily available in electronic form are used as data sources by the multiple agents for the ontology construction process. Alsoan agent starts up with relatively small seed ontology prepared by domain experts as a starting point for the construction of a comprehensive ontology. WordNet lexicon is used to cluster the index terms utilizing the Hypernym, Holonym, Synonym relationships provided by WordNet. This paper has also formulated the OTCM (Ontology Term Coverage Metric) to evaluate the generation of ontology at each phase. © 2011 IEEE.

关键词： Ontology

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Heterogeneous 360 Degree Videos in Metaverse: Differentiated Reinforcement Learning Approaches

Heterogeneous 360 Degree Videos in Metaverse: Differentiated...

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IEEE Conference on Global Communications (GLOBECOM)

作者： Wenhan Yu Jun Zhao Interdisciplinary Graduate Programme Nanyang Technological University School of Computer Science & Engineering Nanyang Technological University

Advanced video technologies are driving the development of the futuristic Metaverse, which aims to connect users from anywhere and anytime. As such, the use cases for users will be much more diverse, leading to a mix of 360-degree videos with two types: non-VR and VR 360° videos. This paper presents a novel Quality of Service model for heterogeneous 360° videos with different requirements for frame rates and cybersickness. We propose a frame-slotted structure and conduct frame-wise optimization using self-designed differentiated deep reinforcement learning algorithms. Specifically, we design two structures, Separate Input Differentiated Output (SIDO) and Merged Input Differentiated Output (MIDO), for this heterogeneous scenario. We also conduct comprehensive experiments to demonstrate their effectiveness.

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Virtual Reality in Metaverse Over Wireless Networks with User-Centered Deep Reinforcement Learning

Virtual Reality in Metaverse Over Wireless Networks with Use...

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IEEE International Conference on Communications (ICC)

作者： Wenhan Yu Terence Jie Chua Jun Zhao Interdisciplinary Graduate Programme Nanyang Technological University School of Computer Science & Engineering Nanyang Technological University

The Metaverse and its promises are fast becoming reality as maturing technologies are empowering the different facets. One of the highlights of the Metaverse is that it offers the possibility for highly immersive and interactive socialization. Virtual reality (VR) technologies are the backbone for the virtual universe within the Metaverse as they enable a hyper-realistic and immersive experience, and especially so in the context of socialization. As the virtual world 3D scenes to be rendered are of high resolution and frame rate, these scenes will be offloaded to an edge server for computation. Besides, the metaverse is user-center by design, and human users are always the core. In this work, we introduce a multi-user VR computation offloading over wireless communication scenario. In addition, we devised a novel user-centered deep reinforcement learning approach to find a near-optimal solution. Extensive experiments demonstrate that our approach can lead to remarkable results under various requirements and constraints.

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Privacy-enhancing queries in personalized search with untrusted service providers

Privacy-enhancing queries in personalized search with untrus...

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作者： Oh, Yunsang Kim, Hyoungshick Obi, Takashi Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Yokohama-shi 226-8502 Japan Computer Laboratory University of Cambridge United Kingdom

For personalized search, a user must provide her personal information. However, this sometimes includes the user's sensitive information about individuals such as health condition and private lifestyle. It is not sufficient just to protect the communication channel between user and service provider. Unfortunately, the collected personal data can potentially be misused for the service providers' commercial advantage (e.g. for advertising methods to target potential consumers). Our aim here is to protect user privacy by filtering out the sensitive information exposed from a user's query input at the system level. We propose a framework by introducing the concept of query generalizer. Query generalizer is a middleware that takes a query for personalized search, modifies the query to hide user's sensitive personal information adaptively depending on the user's privacy policy, and then forwards the modified query to the service provider. Our experimental results show that the best-performing query generalization method is capable of achieving a low traffic overhead within a reasonable range of user privacy. The increased traffic overhead varied from 1.0 to 3.3 times compared to the original query. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.

关键词： Middleware

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Characterization of electrochemically-active defects in si-film laser-crystallized with directional sls by measuring the stress release during secco etching

Characterization of electrochemically-active defects in si-f...

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2009 Vehicles and Photons Symposium

作者： Sasaki, Nobuo Kitahara, Kuninori Yamamoto, Kenichi Faculty of Computer Science and Systems Engineering Okayama Prefectural University Soja-City719-1197 Japan Interdisciplinary Graduate School of Science and Engineering Shimane University Matsue690-8504 Japan

It has been verified that the crystal quality of directional SLS film achieves a position between those of ELC and CLC. The SLS film contains some electrochemically-active in-grain defects, which is hard to be passiva... 详细信息

关键词： Etching

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Hierarchical vectorization for facial images

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Computational Visual Media 2024年第1期10卷 97-118页

作者： Qian Fu Linlin Liu Fei Hou Ying He School of Computer Science and Engineering Nanyang Technological University639798SingaporeSingapore Data61 Commonwealth Scientific and Industrial Research OrganisationSydney2015Australia Interdisciplinary Graduate School Nanyang Technological University and Alibaba Group639798SingaporeSingapore State Key Laboratory of Computer Science Institute of SoftwareChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

The explosive growth of social media means portrait editing and retouching are in high *** portraits are commonly captured and stored as raster images,editing raster images is non-trivial and requires the user to be highly *** at developing intuitive and easy-to-use portrait editing tools,we propose a novel vectorization method that can automatically convert raster images into a 3-tier hierarchical *** base layer consists of a set of sparse diffusion curves(DCs)which characterize salient geometric features and low-frequency colors,providing a means for semantic color transfer and facial expression *** middle level encodes specular highlights and shadows as large,editable Poisson regions(PRs)and allows the user to directly adjust illumination by tuning the strength and changing the shapes of *** top level contains two types of pixel-sized PRs for high-frequency residuals and fine details such as pimples and *** train a deep generative model that can produce high-frequency residuals *** to the inherent meaning in vector primitives,editing portraits becomes easy and *** particular,our method supports color transfer,facial expression editing,highlight and shadow editing,and automatic *** quantitatively evaluate the results,we extend the commonly used FLIP metric(which measures color and feature differences between two images)to consider *** new metric,illumination-sensitive FLIP,can effectively capture salient changes in color transfer results,and is more consistent with human perception than FLIP and other quality measures for portrait *** evaluate our method on the FFHQR dataset and show it to be effective for common portrait editing tasks,such as retouching,light editing,color transfer,and expression editing.

关键词： face editing vectorization Poisson editing color transfer illumination editing expression editing

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An automatic modulation classifier using a frequency discriminator for intelligent software defined radio

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2013年第5期133卷 910-915+1页

作者： Morioka, Kazuyuki Asano, David Department of Mathematics and System Development Interdisciplinary Graduate School of Science and Technology Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan Department of Computer Science and Engineering Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan

In this paper, we proposed a simple frequency discriminator based method to automatically identify PSK and M-ary FSK modulation schemes. This method is simpler than other methods based on statistical moments, neural networks and wavelet transforms. Also, this method can demodulate M-ary FSK signals using the classifier's output, resulting in a simple receiver structure. Results from a digital implementation are presented to show the validity of the proposed method. © 2013 The Institute of Electrical Engineers of Japan.

关键词： Software radio

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A method to construct phase spreading sequences for CPM-CDMA systems

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2014年第4期134卷 534-542页

In this paper, a construction method for phase spreading sequences which is suitable for CPM-CDMA systems is proposed. Using these sequences, the performance of asynchronous CPM-CDMA systems with traditional BPSK/OQPSK-CDMA systems and the tradeoff between spreading factor and modulation parameters are considered. Numerical results show that the optimal modulation index for CPFSK-CDMA systems is h = 0:5 and the performance is better for lower values of BbTc in GMSK-CDMA systems. Also, we found that the user capacities of MSK-CDMA systems are 2.3 times larger than that of BPSK/OQPSK-CDMA systems. © 2014 The Institute of Electrical Engineers of Japan.

关键词： Code division multiple access

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