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18th Australia Conference on Computer-Human Interaction, OZCHI '06

作者： Hornecker, Eva Stifter, Matthias HIT Lab. NZ University of Canterbury Private Bag 4800 Christchurch 8004 New Zealand Institute of Computer Graphics and Algorithms Vienna University of Technology Favoritenstr. 9-11 A-1040 Vienna Austria

ISBN: (纸本)1595935452

This paper reports on the evaluation of a digitallyaugmented exhibition on the history of modern media. We discuss visitors' interaction with installations and corresponding interaction design issues, drawing on results from analysis of logfiles, interviews, and observation in the museum. We see this as an exploration into interaction design of interactive installations for public settings, using the evaluation as a case study on what makes an installation engaging and how it can provide an engaging experience for groups. Copyright the author(s) and CHISIG.

关键词： Museums

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Digital backpacking in the museum with a smartcard 06

Digital backpacking in the museum with a smartcard

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CHINZ 2006: 7th International Conference NZ Chapter of the ACM's Special Interest Group on Human-Computer Interaction(SIGCHI-NZ)

ISBN: (纸本)1595934731

This paper reports on the evaluation of a digitally-augmented exhibition on the history of modern media and our experiences with the methodic approach employed. As a central element of this exhibition visitors can buy a smartcard that enables them to store collected or self-created data in a 'digital backpack', which can be accessed via internet as a personalized souvenir. We have evaluated the exhibition, visitors' perceptions and usage of the card using a multi-method strategy complementing quantitative data-analysis with qualitative, ethnographic methods. This paper focuses on visitors' use and the perceived utility of the smartcard, and our experiences with using automatically generated data from interaction logfiles for analyzing visitor behavior, and with the multi-method strategy. Copyright 2006 ACM.

关键词： Human computer interaction

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The well-separated pair decomposition for balls

arXiv

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arXiv 2017年

作者： Poureidi, Abolfazl Farshi, Mohammad Combinatorial and Geometric Algorithms Lab. Department of Computer Science Yazd University Yazd Iran

Given a real number t > 1, a geometric t-spanner is a geometric graph for a point set in Rdwith straight lines between vertices such that the ratio of the shortest-path distance between every pair of vertices in the graph (with Euclidean edge lengths) to their actual Euclidean distance is at most t. An imprecise point set is modeled by a set R of regions in Rd. If one chooses a point in each region of R, then the resulting point set is called a precise instance of R. An imprecise t-spanner for an imprecise point set R is a graph G = (R,E) such that for each precise instance S of R, graph GS = (S,ES), where ES is the set of edges corresponding to E, is a t-spanner. In this paper, we show that, given a real number t > 1, there is an imprecise point set R of n straight-line segments in the plane such that any imprecise t-spanner for R has (n2) edges. Then, we propose an algorithm that computes a Well-Separated Pair Decomposition (WSPD) of size O(n) for a set of n pairwise disjoint d-dimensional balls with arbitrary sizes. Given a real number t > 1 and given a set of n pairwise disjoint d-balls with arbitrary sizes, we use this WSPD to compute in O(n log n + n/(t - 1)d) time an imprecise t-spanner with O(n/(t - 1)d) edges for balls. Copyright © 2017, The Authors. All rights reserved.

关键词： Geometry

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Rule-based on-the-fly web spambot detection using action strings

Rule-based on-the-fly web spambot detection using action str...

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7th Annual Collab.ration, Electronic Messaging, Anti-Abuse and Spam Conference, CEAS 2010

作者： Hayati, Pedram Potdar, Vidyasagar Talevski, Alex Smyth, William F. Anti Spam Research Lab. Curtin Business School Curtin University Perth WA Australia Algorithms Research Group Department of Computing and Software McMaster University Hamilton ON L8S 4K1 Canada

Web spambots are a new type of internet robot that spread spam content through Web 2.0 applications like online discussion boards, blogs, wikis, social networking platforms etc. These robots are intelligently designed to act like humans in order to fool safeguards and other users. Such spam content not only wastes valuable resources and time but also may mislead users with unsolicited content. Spam content typically intends to misinform users (scams), generate traffic, make sales (marketing/advertising), and occasionally compromise parties, people or systems by spreading spyware or malwares. Current countermeasures do not effectively identify and prevent web spambots. Proactive measures to deter spambots from entering a site are limited to question/response scenarios. The remaining efforts then focus on spam content identification as a passive activity. Spammers have evolved their techniques to bypass existing anti-spam filters. In this paper, we describe a rule-based web usage behaviour action string that can be analysed using Trie data structures to detect web spambots. Our experimental results show the proposed system is successful for on-the-fly classification of web spambots hence eliminating spam in web 2.0 applications.

关键词： Computer viruses

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A spiking neural P system simulator based on CUDA

A spiking neural P system simulator based on CUDA

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12th International Conference on Membrane Computing, CMC 2011

作者： Cabarle, Francis George C. Adorna, Henry Martínez, Miguel A. Algorithms and Complexity Lab. Department of Computer Science University of the Philippines Diliman Diliman 1101 Quezon City Philippines Research Group on Natural Computing Department of Computer Science and Artificial Intelligence University of Seville Avda. Reina Mercedes s/n 41012 Sevilla Spain

ISBN: (纸本)9783642280238

In this paper we present a Spiking Neural P system (SNP system) simulator based on graphics processing units (GPUs). In particular we implement the simulator using NVIDIA CUDA enabled GPUs. The massively parallel architecture of current GPUs is very suitable for the maximally parallel computations of SNP systems. We simulate a wider variety of SNP systems, after presenting a previous work on SNP system matrix representation which led to their simulation in GPUs, and the simulation algorithm included here. Finally, we compare and present the performance speedups of the CPU-GPU based simulator over the CPU only simulator. © 2012 Springer-Verlag.

关键词： Graphics processing unit

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A stochastic articulatory-to-acoustic mapping as a basis for speech recognition

A stochastic articulatory-to-acoustic mapping as a basis for...

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IEEE Instrumentation and Measurement Technology Conference

作者： J. Hodgen P. Valdez Modeling Algorithms & Inf. Group Los Alamos Nat. Lab. NM USA Modeling Algorithms & Informatics Group (CCS-3) Los Alamos National Laboratory Los Alamos NM USA

ISBN: (纸本)0780366468

Hidden Markov models of speech acoustics are the current state-of-the-art in speech recognition, but these models bear little resemblance to the processes underlying speech production. We describe two stochastic models of speech production: maximum likelihood continuity mapping (MALCOM) and conditional observable maximum likelihood continuity mapping (CO-MALCOM). The main component of these models is a stochastic mapping between acoustics and speech articulation. Perhaps surprisingly, the parameters of the stochastic mapping can be found using only acoustic data. We discuss theoretical and experimental reasons to believe that MALCOM and CO-MALCOM learn a stochastic mapping between articulator positions and speech acoustics. CO-MALCOM can be combined with standard recognition algorithms to do speech recognition based on a production model.

关键词： Stochastic processes Speech recognition Hidden Markov models Acoustics Speech processing Maximum likelihood estimation Automatic speech recognition Informatics lab.ratories World Wide Web

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Spiking neural P system simulations on a high performance GPU platform

Spiking neural P system simulations on a high performance GP...

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11th International Conference on algorithms and Architectures for Parallel Processing, ICA3PP 2011

作者： Cabarle, Francis George Adorna, Henry Martínez-Del-Amor, Miguel A. Pérez-Jiménez, Mario J. Algorithms and Complexity Lab. Department of Computer Science University of the Philippines Diliman Quezon City Diliman 1101 Philippines Research Group on Natural Computing Department of Computer Science and Artificial Intelligence University of Seville Avda. Reina Mercedes s/n Sevilla 41012 Spain

ISBN: (纸本)9783642246685

In this paper we present our results in adapting a Spiking Neural P system (SNP system) simulator to a high performance graphics processing unit (GPU) platform. In particular, we extend our simulations to larger and more complex SNP systems using an NVIDIA Tesla C1060 GPU. The C1060 is manufactured for high performance computing and massively parallel computations, matching the maximally parallel nature of SNP systems. Using our GPU accelerated simulations we present speedups of around 200x for some SNP systems, compared to CPU only simulations. © 2011 Springer-Verlag.

关键词： Graphics processing unit

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Unsupervised adversarial domain adaptation for acoustic scene classification

arXiv

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arXiv 2018年

作者： Gharib, Shayan Drossos, Konstantinos Çakir, Emre Serdyuk, Dmitriy Virtanen, Tuomas Audio Research Group Lab. of Signal Processing Tampere University of Technology Tampere Finland Montreal Institute for Learning Algorithms MontrealQC Canada

A general problem in acoustic scene classification task is the mismatched conditions between training and testing data, which significantly reduces the performance of the developed methods on classification accuracy. As a countermeasure, we present the first method of unsupervised adversarial domain adaptation for acoustic scene classification. We employ a model pre-trained on data from one set of conditions and by using data from other set of conditions, we adapt the model in order that its output cannot be used for classifying the set of conditions that input data belong to. We use a freely availab.e dataset from the DCASE 2018 challenge Task 1, subtask B, that contains data from mismatched recording devices. We consider the scenario where the annotations are availab.e for the data recorded from one device, but not for the rest. Our results show that with our model agnostic method we can achieve ∼ 10% increase at the accuracy on an unseen and unlab.led dataset, while keeping almost the same performance on the lab.led dataset. Copyright © 2018, The Authors. All rights reserved.

关键词： Machine learning

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A Model of the Elastic Dynamic Torsion of a Ring Laser Gyroscope Mechanical Dither and a Method for its Calibration

A Model of the Elastic Dynamic Torsion of a Ring Laser Gyros...

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Saint Petersburg International Conference on Integrated Navigation Systems (ICINS)

作者： G.O. Barantsev A.V. Kozlov I.Kh. Shaimardanov A.V. Nekrasov Navigation and Control Lab. Lomonosov Moscow State University Moscow Russia Algorithms and Software Dev. JSC "Inertial Technologies of Technocomplex" Russia

We present a model of the dynamic elastic torsion of the mechanical dithering devices of ring laser gyroscopes and analyze its impact on the accuracy of attitude determination in a strapdown inertial navigation system. We also describe a method for calibrating such parameters in order to compensate for this effect in attitude integration algorithm. The method is an extension to the existing calibration technique introduced in 2009 by N.A. Parusnikov of Moscow State University, applicable to tactical and navigation grade inertial systems on a turntable with horizontal rotation axis. New parameters of dynamic elastic torsion are included into the state vector of a linear state-space model subject to estimation. We examine their estimability and predicted covariance, and as present experimental results. We extend the model with three parameters, which was described in our previous work, to the one with nine parameters.

关键词：

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Elastic Dynamic Torsion of a Ring Laser Gyroscope Mechanical Dither and its Effect on the Accuracy of Attitude Determination

Elastic Dynamic Torsion of a Ring Laser Gyroscope Mechanical...

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Saint Petersburg International Conference on Integrated Navigation Systems (ICINS)

作者： G.O. Barantsev A.V. Kozlov I.Kh. Shaimardanov A.V. Nekrasov Navigation and Control Lab. Lomonosov Moscow State University Moscow Russia Algorithms and Software dev. JSC “Inertial Technologies of Technocomplex” Russia

We analyze the effect of the dynamic elastic torsion, which mechanical dithering devices of ring laser gyroscopes can be subject to, on the accuracy of attitude determination in a strapdown inertial navigation system. We also describe a method for calibrating their parameters in order to compensate for this effect in attitude integration algorithm. The method represents an extension of the existing technique introduced in 2009 by N.A. Parusnikov from the Moscow State University, applicable to tactical and navigation-grade inertial systems on a turntable with horizontal rotation axis. New parameters of dynamic elastic torsion get into the state vector of a linear state-space model subject to estimation. We examine their observability and predicted covariance, as well as present the experimental results.

关键词： Inertial navigation Production Ring lasers Position measurement Laser modes Gyroscopes Calibration

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