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4th International conference on Advanced Computing, Networking and Informatics (ICACNI)

作者： Koti, Nishat Purushothama, B. R. Natl Inst Technol Goa Ponda 403401 Goa India

ISBN: (纸本)9789811033766;9789811033759

While providing access control in a hierarchical access structure, a partially ordered set of security classes can be used to depict an access hierarchy. Data accessible to descendants of a particular security class should also be accessible to the users of that security class. Towards this, an access control scheme is proposed for providing dynamic hierarchical access control. In the proposed solution, the storage at the users is constant. The public key storage is equal to the size of the hierarchy. Also, deriving the decryption key of a descendant class involves constant cost at the users in the security class.

关键词： Hierarchical access control Symmetric key Dynamic classes Constant key derivation cost

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Analyzing accessed content sequences with HDP-based models 18

Analyzing accessed content sequences with HDP-based models

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3rd International conference on multimedia systems and Signal Processing, ICMSSP 2018

作者： Cai, Weihong Chen, Yecong Liu, Jianquan Hu, Jiang Shantou University Shantou Guangdong China NEC Corporation Japan

ISBN: (纸本)9781450364577

The need for auditing network users' behaviors based on their accessed content urges for a new method for modeling and analysis. Topic model is a probabilistic generative model for data mixture of varying length that can extract features from individual instances of content. The hidden Markov model can be used for analyzing sequences of content. By introducing Hierarchical Dirichlet Processes on top of topic mixtures and HMMs, we can tackle down the challenges of unknown numbers of mixtures in both models by resorting to nonparametric approach. We employ variational inference for model calculation, and cluster the extracted user patterns in the form of HMM parameters to detect potential anomalies in access behavior. The proposed scheme is then verified by carrying out experiments on the LAN users' log data in an institute. © 2018 Association for Computing Machinery.

关键词： Mixtures

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Development of Automatic Evaluation Tool for Mobile accessibility for Android Application

Development of Automatic Evaluation Tool for Mobile Accessib...

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International conference on systems of Collaboration (SysCo)

作者： Eunju Park Sungjun Han Hogon Bae Raekyung Kim Seungjae Lee Daejune Lim Hankyu Lim Dept. of Multimedia Engineering Andong National University Andong Republic of Korea NEXT Story inc Gumi Republic of Korea

ISBN: (数字)9781728142166

ISBN: (纸本)9781728142173

As the number of mobile services grows, mobile users who gain access to the Internet via mobile devices are increasing. accessibility refers to providing functionality to smart phone apps (and web) so that all human can access contents/service/products on the Internet regardless their age and disability. accessibility support is essential for mobile users owing to the unique nature and capabilities of mobile devices, such as smaller screens, touch and gesture interface, and built-in screen readers specific to operating systems. The latest mobile device usage statistics showed that between the two different mobile channels, mobile apps and mobile webs, consumers spend most of their time in mobile apps. accessibility of apps in a smartphone is more important than ever as more people use a smartphone apps to consume content/ service/ product on the Internet. Automated tools for mobile apps that evaluate compliance with accessibility standards are still scarce. This makes it difficult for developers who are unfamiliar with accessibility needs to ensure their apps are accessible by everyone. While the prototype does not include all the functions, it demonstrates that it is feasible to develop a full version of an automatic assessment tool for smartphone apps, which is an under-researched *** paper designs an accessibility evaluation tool that checks mobile apps for conformance with accessibility standards, and develops a prototype of the evaluation tool. The proposed tool verifies the existence (or nonexistence) of alternative text for non-text content, which is an important accessibility factor for visually impaired users. It discovers missing alternative text by checking the contentDescription attribute of the ImageView element in Android XML files.

关键词： Tools Standards Internet Guidelines Smart phones Testing

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Advances in Smart content-Oriented Display Technology Preface

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DISPLAYS 2018年 55卷 1-2页

作者： Kim, Bryan (Byung-Gyu) Lee, Kye-Shin Psannis, Kostas E. Sookmyung Womens Univ Dept IT Engn Seoul South Korea Univ Akron Dept Elect & Comp Engn Akron OH USA Univ Macedonia Dept Appl Informat Thessaloniki Greece

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The IPIN 2019 Indoor Localisation Competition-Description and Results

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IEEE access 2020年 8卷 206674-206718页

作者： Potorti, Francesco Park, Sangjoon Crivello, Antonino Palumbo, Filippo Girolami, Michele Barsocchi, Paolo Lee, Soyeon Torres-Sospedra, Joaquin Jimenez Ruiz, Antonio Ramon Perez-Navarro, Antoni Martin Mendoza-Silva, German Seco, Fernando Ortiz, Miguel Perul, Johan Renaudin, Valerie Kang, Hyunwoong Park, Soyoung Lee, Jae Hong Park, Chan Gook Ha, Jisu Han, Jaeseung Park, Changjun Kim, Keunhye Lee, Yonghyun Gye, Seunghun Lee, Keumryeol Kim, Eunjee Choi, Jeong-Sik Choi, Yang-Seok Talwar, Shilpa Cho, Seong Yun Ben-Moshe, Boaz Scherbakov, Alex Antsfeld, Leonid Sansano-Sansano, Emilio Chidlovskii, Boris Kronenwett, Nikolai Prophet, Silvia Landay, Yael Marbel, Revital Zheng, Lingxiang Peng, Ao Lin, Zhichao Wu, Bang Ma, Chengqi Poslad, Stefan Selviah, David R. Wu, Wei Ma, Zixiang Zhang, Wenchao Wei, Dongyan Yuan, Hong Jiang, Jun-Bang Huang, Shao-Yung Liu, Jing-Wen Su, Kuan-Wu Leu, Jenq-Shiou Nishiguchi, Kazuki Bousselham, Walid Uchiyama, Hideaki Thomas, Diego Shimada, Atsushi Taniguchi, Rin-Ichiro Cortes Puschel, Vicente Lungenstrass Poulsen, Tomas Ashraf, Imran Lee, Chanseok Ali, Muhammad Usman Im, Yeongjun Kim, Gunzung Eom, Jeongsook Hur, Soojung Park, Yongwan Opiela, Miroslav Moreira, Adriano Nicolau, Maria Joao Pendao, Cristiano Silva, Ivo Meneses, Filipe Costa, Antonio Trogh, Jens Plets, David Chien, Ying-Ren Chang, Tzu-Yu Fang, Shih-Hau Tsao, Yu Natl Res Council ISTI CNR Informat Sci & Technol Inst I-56124 Pisa Italy Elect & Telecommun Res Inst Daejeon 34129 South Korea Univ Jaume 1 Inst New Imaging Technol Castellon de La Plana 12071 Spain UBIK Geospatial Solut Castellon de La Plana 12006 Spain Ctr Automat & Robot CSIC UPM Arganda Del Rey 28500 Spain Univ Oberta Catalunya Fac Comp Sci Multimedia & Telecommun Internet Interdisciplinary Inst IN3 Barcelona 08018 Spain Univ Gustave Eiffel IFSTTAR AME GEOLOC F-44344 Bouguenais France Seoul Natl Univ Dept Aerosp Engn ASRI Seoul 08826 South Korea HANA MICRON Asan 336864 South Korea Intel Corp Intel Labs Santa Clara CA 95054 USA Intel Corp Intel Labs Hillsboro OR 97124 USA Kyungil Univ Dept Robot Engn Gyongsan 38428 South Korea Ariel Univ Dept Comp Sci IL-50075 Ariel Israel Ariel Univ Dept Elect Engn IL-50075 Ariel Israel Naver Labs Europe F-38240 Meylan France Karlsruhe Inst Technol KIT Inst Control Syst IRS D-76131 Karlsruhe Germany Xiamen Univ Dept Informat & Commun Engn Xiamen 361005 Peoples R China Queen Mary Univ London Dept Elect Engn & Comp Sci London E1 4NS England Univ Coll London UCL Dept Elect & Elect Engn London WC1E 7JE England Wuhan Univ Sch Geodesy & Geomat Wuhan 430070 Peoples R China Chinese Acad Sci Aerosp Informat Res Inst Beijing 100094 Peoples R China Univ Chinese Acad Sci Beijing 100094 Peoples R China Natl Taiwan Univ Sci & Technol Dept Elect & Comp Engn Taipei 10607 Taiwan Kyushu Univ Grad Sch Informat Sci & Elect Engn Dept Adv Informat Technol Fukuoka 8190395 Japan ENSTA ParisTech F-91120 Palaiseau France Kyushu Univ Lib Fukuoka 8190395 Japan Kyushu Univ Fac Informat Sci & Elect Engn Fukuoka 8190395 Japan AraraDS Santiago 8340457 Chile Yeungnam Univ Dept Informat & Commun Engn Gyongsan 38541 South Korea Univ Gujrat Dept Comp Sci Gujrat City 50700 Pakistan PJ Safarik Univ UPJS Fac Sci Inst Comp Sci Kosice 04001 Slovakia Univ Minho ALGORITMI Res Ctr P-4800058 Guimaraes Portugal Univ Ghent Dept I

IPIN 2019 Competition, sixth in a series of IPIN competitions, was held at the CNR Research Area of Pisa (IT), integrated into the program of the IPIN 2019 conference. It included two on-site real-time Tracks and three off-site Tracks. The four Tracks presented in this paper were set in the same environment, made of two buildings close together for a total usable area of 1000 m(2) outdoors and and 6000 m(2) indoors over three floors, with a total path length exceeding 500 m. IPIN competitions, based on the EvAAL framework, have aimed at comparing the accuracy performance of personal positioning systems in fair and realistic conditions: past editions of the competition were carried in big conference settings, university campuses and a shopping mall. Positioning accuracy is computed while the person carrying the system under test walks at normal walking speed, uses lifts and goes up and down stairs or briefly stops at given points. Results presented here are a showcase of state-of-the-art systems tested side by side in real-world settings as part of the on-site real-time competition Tracks. Results for off-site Tracks allow a detailed and reproducible comparison of the most recent positioning and tracking algorithms in the same environment as the on-site Tracks.

关键词： Sensors Wireless fidelity Sensor systems Real-time systems Particle measurements Atmospheric measurements Stakeholders Indoor localisation indoor navigation competition benchmarking smartphone-based positioning foot-mounted pedestrian dead reckoning Wi-Fi fingerprinting magnetic field camera-based positioning inertial-based positioning sensor fusion Kalman filter particle filter

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AN access Pattern Model Analysis for Online VoD multimedia Flow For BigData 4

AN Access Pattern Model Analysis for Online VoD multimedia F...

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4th IEEE International conference on Big Data Security on Cloud (BigDataSecurity) / 4th IEEE International conference on High Performance and Smart Computing (HPSC) / 3rd IEEE International conference on Intelligent Data and Security (IDS)

作者： Han, Zhijie Ma, Ji-Ao Zhao, Hui Henan Univ Inst Data & Knowledge Engn Kaifeng Henan Peoples R China Henan Univ Sch Sofeware Kaifeng Henan Peoples R China Jiangsu High Technol Res Key Lab Wireless Sensor Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781538643990

The commonly agreed Zipf-like access pattern of Web work-loads is mainly based on Internet measurements when text-based content dominated the Web traffic. However, with dramatic increase of VoD media traffic on the Internet such as Flash P2P, the inconsistency between the access patterns of media objects and the Zipf model has been observed in a number of studies. Recently, many researcher has mentioned take long tail effect as a replacement of Zipf law. In this paper, we have studied a large variety of media work-loads collected from both browser and server sides in Adobe Flash P2P systems which applied in Youku, Youtube etc. Through extensive analysis and modeling, we find the object reference ranks of all these workloads follow the logistic (LOG) distribution despite their different media systems and delivery methods, This mean it does not follow long tail effect;We have further analyzed the effectiveness of media caching with a mathematical model.

关键词： Traffic analysis Modeling access pattern logistic distribution

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Phase-Aligned Foveated Rendering for Virtual Reality Headsets 25

Phase-Aligned Foveated Rendering for Virtual Reality Headset...

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25th IEEE conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Turner, Eric Jiang, Haomiao Saint-Macary, Damien Bastani, Behnam Google Inc Mountain View CA 94043 USA

ISBN: (纸本)9781538633656

We propose a novel method of foveated rendering for virtual reality, targeting head-mounted displays with large fields of view or high pixel densities. Our foveation method removes motion-induced flicker in the periphery by aligning the rendered pixel grid to the virtual scene content during rasterization and upsampling. This method dramatically reduces detectability of motion artifacts in the periphery without complex interpolation or anti-aliasing algorithms.

关键词： H.5.1 [Information Interfaces and Presentation]: multimedia Information systems Artificial, augmented, and virtual realities

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Exploring the online learning response to predict students' satisfaction

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Journal of Physics: conference Series 2021年第1期1783卷

作者： Dwi Sulisworo Yosi Wulandari Muh Saeful Effendi Mazni Alias Physics Education Department Ahmad Dahlan University Indonesia Ahmad Dahlan University Indonesia Multimedia University Malaysia

Online learning is carried out as an effort to utilize information technology available in higher education institutions in anticipation of changes in the educational environment. Using appropriate technology in learning management is believed to be a drive to improve learning performance particularly in literary learning. This study aims to reveal and describe the implementation of online learning. The data was obtained based on student responses. The results of this study will be the basis for improving online learning management. This research is a qualitative descriptive study involving 42 students as respondents. There are 9 questions to determine students' understanding and perception. The data in this research are processed qualitatively using the concept of Affinity diagram and Pareto diagram. From these diagrams, interpretation can be made by referring to the results of other researchers and relevant theories. The results of this study reveal that the main inhibiting factors in implementing online learning are the level of access to the internet, the low flexibility of the assignments submission deadline, ineffective feedback to students, and unclear instructions. In the LMS (Learning Management systems) display, students find it is less attractive (the selection of appropriate themes of the display). However, with the online learning, the students felt that it potentially eases them in obtaining content and sending assignments/learning projects, and gives the flexibility of study time.

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Texture Based Approach for Image Watermarking 3

Texture Based Approach for Image Watermarking

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3rd International conference and Workshops on Recent Advances and Innovations in Engineering, ICRAIE 2018

作者： Soni, Satish Somwanshi, Devendra Poornima University Jaipur India

ISBN: (纸本)9781538645253

Internet is the most popular thing for human now days. There space unit varied problems and challenges in information security in net system just like the genuineness of content or matter is crucial issue for resolution the matter of repeating, modifying, associate in Nursing distributing the intellectual properties in an nonlocal method. With the ascension of net the varied digital ways has been projected to guard the multimedia system data from the non-authorized accesses use and alter. Among all the projected ways the watermarking technique is that the commonest technique for safeguarding the multimedia system information for unauthorized access. a completely unique methodology is projected. Secure information extraction from transform based image watermarking techniques is extracted in this proposed work. Signal process attacks and Geometric attacks are used to examine the information which is extracted from primary image. In this proposed work the watermark images are secured by testing them against unauthorized detection techniques. To make this work secure a correlation based detector is applied. Results show that the watermarked image is secure and robust against several attacks which includes all kind of unauthorized Detection attacks, also Signal Processing attacks and Geometric attacks as well. © 2018 IEEE.

关键词： multimedia systems

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Joint Optimization of Flow Entry Aggregation and Routing Selection in Software Defined Wireless access Networks 13th

Joint Optimization of Flow Entry Aggregation and Routing Sel...

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13th International conference on Wireless algorithms, systems, and Applications (WASA)

作者： Zhao, Zhipeng Wu, Bin Xiao, Jie Hu, Zhenyu Tianjin Univ Sch Comp Sci & Technol Tianjin Peoples R China Univ Hong Kong Dept Elect & Elect Engn Hong Kong Peoples R China Henan Elect Power Survey & Design Inst Zhengzhou Henan Peoples R China

ISBN: (纸本)9783319942681;9783319942674

Software Defined Wireless access Networks (SD-WAN) produce large amounts of traffic, which has caused limited flow table space in the TCAM. To solve the issue, this paper enables routing to overlap as many as possible with a minimum transmission delay, and thus traffic can be allocated to common paths to achieve flow entry aggregation. However, overlapping routing and traffic delay are two conflicting factors. An Integer Linear Program (ILP) is first proposed to minimize the total cost by tradeoff of the two factors. Through numerical experiments, this paper shows the effectiveness of the proposed method.

关键词： ILP SD-WAN Flow entry aggregation TCAM (ternary content addressable memory)

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