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Reports of the AAAI 2011 fall symposia

AI Magazine 2012年第1期33卷 71-78页

作者： Blisard, Sam Carmichael, Ted Ding, Li Finin, Tim Frost, Wende Graesser, Arthur Hadzikadic, Mirsad Kagal, Lalana Kruijff, Geert-Jan M. Langley, Pat Lester, James McGuinness, Deborah L. Mostow, Jack Papadakis, Panagiotis Pirri, Fiora Prasad, Rashmi Stoyanchev, Svetlana Varakantham, Pradeep Interactive Systems Section Naval Research Laboratory Washington DC United States Department of Software and Information Systems University of North Carolina Charlotte United States Qualcomm Inc. United States Department of Computer Science and Electrical Engineering University of Maryland Baltimore County United States Department of Psychology Institute of Intelligent Systems University of Memphis United States Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology United States Germany Department of Computer Science and Engineering Arizona State University Tempe AZ United States Department of Computer Science North Carolina State University United States Department of Computer Science and Cognitive Science Rensselaer Polytechnic Institute United States School of Computer Science Carnegie Mellon University United States Department of Informatics and Systems University of Sapienza Rome Italy Department of Informatics and Systems ALCOR Lab University of Sapienza Rome Italy Department of Health Informatics and Administration University of Wisconsin-Milwaukee United States Columbia University United States School of Information Systems Singapore Management University Singapore Singapore

The Association for the Advancement of Artificial Intelligence was pleased to present the 2011 Fall Symposium Series, held Friday through Sunday, November 4-6, at the Westin Arlington Gateway in Arlington, Virginia. The titles of the seven symposia are as follows: (1) Advances in Cognitive Systems;(2) Building Representations of Common Ground with Intelligent Agents;(3) Complex Adaptive Systems: Energy, Information, and Intelligence;(4) Multiagent Coordination under Uncertainty;(5) Open Government Knowledge: AI Opportunities and Challenges;(6) Question Generation;and (7) Robot-Human Teamwork in Dynamic Adverse Environments. The highlights of each symposium are presented in this report. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Intelligent agents

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Complex support vector regression

Complex support vector regression

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2012 3rd International Workshop on Cognitive Information Processing, CIP 2012

作者： Bouboulis, Pantelis Theodoridis, Sergios Mavroforakis, Charalampos Department of Informatics and Telecommunications University of Athens Athens 157 84 Greece Department of Computer Science Data Management Lab. Boston University Boston MA 02215 United States

ISBN: (纸本)9781467318785

We present a support vector regression (SVR) rationale for treating complex data, exploiting the notions of widely linear estimation and pure complex kernels. To compute the Lagrangian and derive the dual problem, we employ the recently presented Wirtinger's calculus on complex RKHS. We prove that this approach is equivalent with solving two real SVR problems exploiting a specific real kernel, which it is induced by the chosen complex kernel. © 2012 IEEE.

关键词： Calculations

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Can modified casual speech reach the intelligibility of clear speech?

Can modified casual speech reach the intelligibility of clea...

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13th Annual Conference of the International-Speech-Communication-Association

作者： Koutsogiannaki, M. Pettinato, M. Mayo, C. Kandia, V. Stylianou, Y. Institute of Computer Science FORTH Multimedia Informatics Lab. UoC Greece Speech Hearing and Phonetic Sciences University College London United Kingdom Centre for Speech Technology Research University of Edinburgh United Kingdom

ISBN: (纸本)9781622767595

Clear speech is a speaking style adopted by speakers in an attempt to maximize the clarity of their speech and is proven to be more intelligible than casual speech. This work focuses on modifying casual speech to sound as intelligible as clear speech. First, we examine the role of speaking rate for intelligibility. Clear and casual speech signals are time-scale stretched, matching the average duration of the casual and clear speech respectively. Next, spectral shaping and dynamic range compression are considered for increasing the loudness of the original casual speech while keeping the power of signals unaffected. Subjective tests with speech-in-noise conditions using speech shaped noise at -3, 0, and 5 dB SNR show that clear speech with high speaking rate is less intelligible than the original clear speech but still more intelligible than the unmodified casual speech. However, the intelligibility score for the time-scaled modified casual speech is deteriorated. In contrast, the loudness amplification considerably improved the intelligibility of the casual speech, reaching the scores of original clear speech. Objective measurements based on Speech Intelligibility Index (SE) are well correlated with the subjective test except for the time-scaled casual signal.

关键词： Clear speech Casual speech Speech intelligibility Spectral modifications

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Low color-depth image encryption scheme for use in COTS smartphones

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WSEAS Transactions on Systems 2012年第9期11卷 527-538页

作者： Doukas, Nikolaos Department of Mathematics and Engineering Science Informatics and Computer Science Lab Univ. Military Education Vari - 16673 Greece

Cyber security and privacy are sources of increasing importance for the successful deployment of information and communication technology. This paper investigates aspects concerning privacy during the communication of low color depth images in encrypted form via low bit-rate, error prone channels. Existing approaches for region of interest determination in images, image encryption and image compression within this context are presented. The problem is established and conflicts between the aims of data compression and data encryption are out-lined and theoretically founded. An innovative approach is hence presented that automatically selects regions of interest in low color depth images, while achieving an acceptable level of security without increasing the data volume of the resulting image. The technique is suitable for cases where the data being transmitted has a limited lifecycle period and the compressed and encrypted image data are likely to be corrupted, such as the transmission via channels that are not guaranteed error - free. An error correction add-on to the algorithm permits an increase on the average decrypted image quality. Initial cryptanalytic resilience results for the proposed scheme are given. The proposed scheme is intended as a means of facilitating the deployment of COTS technology in tactical situations, by increasing the level of security of the underlying infrastructure.

关键词： Error correction

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The deletion operation in xBR-trees

The deletion operation in xBR-trees

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2012 16th Panhellenic Conference on informatics, PCI 2012

作者： Roumelis, George Vassilakopoulos, Michael Corral, Antonio Information Processing and Management Lab. Dept. of Computer Science and Biomedical Informatics University of Central Greece Lamia Greece Dept. of Languages and Computing University of Almeria Almeria Spain

ISBN: (纸本)9780769548258

In order to design a spatial index, the most important operations are: insertion, deletion and search. We focus on the deletion operation over the xBR-tree, a spatial data secondary memory structure that belongs to the Quad tree family. The algorithm of handling deletions is presented, taking into account that the deletion of a leaf item may cause entries deletions from internal nodes. The well-known merging technique is applied, to retain the efficiency of the xBR-tree. © 2012 IEEE.

关键词： Trees (mathematics)

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Virtual projection: Exploring optical projection as a metaphor for multi-device interaction 12

Virtual projection: Exploring optical projection as a metaph...

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30th ACM Conference on Human Factors in Computing Systems, CHI 2012

作者： Baur, Dominikus Boring, Sebastian Feiner, Steven Media Informatics Group University of Munich Munich Germany Interactions Lab. University of Calgary Calgary AB Canada Department of Computer Science Columbia University New York NY United States

ISBN: (纸本)9781450310154

Handheld optical projectors provide a simple way to overcome the limited screen real-estate on mobile devices. We present virtual projection (VP), an interaction metaphor inspired by how we intuitively control the position, size, and orientation of a handheld optical projector's image. VP is based on tracking a handheld device without an optical projector and allows selecting a target display on which to position, scale, and orient an item in a single gesture. By relaxing the optical projection metaphor, we can deviate from modeling perspective projection, for example, to constrain scale or orientation, create multiple copies, or offset the image. VP also supports dynamic filtering based on the projection frustum, creating overview and detail applications, and selecting portions of a larger display for zooming and panning. We show exemplary use cases implemented using our optical feature-tracking framework and present the results of a user study demonstrating the effectiveness of VP in complex interactions with large displays. Copyright 2012 ACM.

关键词： Optical projectors

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A science cloud for data intensive sciences

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Data science Journal 2013年 12卷 WDS139-WDS146页

作者： Murata, Ken T. Watari, Shinichi Nagatsuma, Tsutomu Kunitake, Manabu Watanabe, Hidenobu Yamamoto, Kazunori Kubota, Yasufumi Kato, Hisao Tsugawa, Takuya Ukawa, Kentaro Muranaga, Kazuya Kimura, Eizen Tatebe, Osamu Fukazawa, Keiichiro Murayama, Yasuhiro 4-2-1 Nukui-kita Koganei Tokyo 184-8795 Japan Systems Engineering Consultants Co. Ltd. 4-10-1 Yoga Setagaya Tokyo 158-0097 Japan Dept. Medical Informatics of Medical School of Ehime Univ. Situkawa Toon City Ehime 791-0295 Japan Dept. Computer Science Univ. of Tsukuba Tenoudai 1-1-1 Tsukuba Science City Ibaraki 305-8573 Japan Research Institute for Information Technology Kyushu University 6-10-1 Hakozaki Higashi-Ku Fukuoka 812-8581 Japan Integrated Science Data System Research Lab NICT 4-2-1 Nukui-kita Koganei Tokyo 184-8795 Japan

It is often discussed that the fourth methodology for science research is "informatics". The first methodology is a theoretic approach, the second one is observation and/or experiment, and the third one is computer simulation. informatics is a new methodology for data intensive science, which is a new concept based on the fact that most scientific data are digitalized and the amount of data is huge. The facilities to support informatics are cloud systems. Herein we propose a cloud system especially designed for science. The basic concepts, design, resources, implementation, and applications of the NICT science cloud are discussed.

关键词： Digital storage

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Privacy issues in social networks: A brief survey

Privacy issues in social networks: A brief survey

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14th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU 2012

作者： Díaz, Irene Ralescu, Anca University of Oviedo Department of Computer Science E-33204 Oviedo Spain University of Cincinnati School of Computing Sciences and Informatics Machine Learning and Computational Intelligence Lab. Cincinnati OH 45221-0008 United States

ISBN: (纸本)9783642317231

Most social networks allow individuals to share their information with friends but also with unknown people. Therefore, in order to prevent unauthorized access to sensitive, private information, the study of privacy issues in social networks has become an important task. This paper provides a brief overview of the emerging research in privacy issues in social networks. © 2012 Springer-Verlag.

关键词： Data mining

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ToF/RGB sensor fusion for augmented 3D endoscopy using a fully automatic calibration scheme

ToF/RGB sensor fusion for augmented 3D endoscopy using a ful...

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Workshops Bildverarbeitung fur die Medizin: Algorithmen - Systeme - Anwendungen, BVM 2012 - Workshop on Image Processing for Medicine: Algorithms - Systems - Applications, BVM 2012

作者： Haase, Sven Forman, Christoph Kilgus, Thomas Bammer, Roland Maier-Hein, Lena Hornegger, Joachim Pattern Recognition Lab Dept. of Computer Science Univ. Erlangen-Nuremberg Germany Department of Radiology Stanford University Stanford CA United States Division of Medical and Biological Informatics DKFZ Heidelberg Germany Germany

ISBN: (纸本)9783642285011

Three-dimensional Endoscopy is an evolving field of research and offers great benefits for minimally invasive procedures. Besides the pure topology, color texture is an inevitable feature to provide an optimal visualization. Therefore, in this paper, we propose a sensor fusion of a Time-of-Flight (ToF) and an RGB sensor. This requires an intrinsic and extrinsic calibration of both cameras. In particular, the low resolution of the ToF camera (64×50 px) and inhomogeneous illumination precludes the use of standard calibration techniques. By enhancing the image data the use of self-encoded markers for automatic checkerboard detection, a re-projection error of less than 0.23 px for the ToF camera was achieved. The relative transformation of both sensors for data fusion was calculated in an automatic manner. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Endoscopy

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Investigating bias in traditional media through social media

Investigating bias in traditional media through social media

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21st Annual Conference on World Wide Web, WWW'12

作者： Younus, Arjumand Qureshi, M. Atif Kingrani, Suneel Kumar Saeed, Muhammad Touheed, Nasir O'Riordan, Colm Gabriella, Pasi Computational Intelligence Research Group Information Technology National University of Ireland Galway Ireland Information Retrieval Lab. Informatics Systems and Communication University of Milan Bicocca Milan Italy Web Science Research Group Faculty of Computer Science Institute of Business Administration Karachi Pakistan

ISBN: (纸本)9781450312301

It is often the case that traditional media provide coverage of a news event on the basis of journalists' viewpoints - a problem termed in the literature as media bias. On the other hand social media have given birth to an alternative paradigm of journalism known as "citizen journalism". We take advantage of citizen journalism to detect the bias in traditional media and propose a simple model for empirical measurement of media bias. Copyright is held by the author/owner(s).

关键词： Social networking (online)

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