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A hardhat detection system for preventing work zone accidents in complex scene images

A hardhat detection system for preventing work zone accident...

引用

2009 International Conference on Image Processing, computer Vision, and Pattern Recognition, IPCV 2009

作者： Kim, Moorim Nam, Yunyoung Kim, Suckchul Cho, Weduke Department of Electrical and Computer Engineering Ajou University Suwon Korea Republic of Department of Electrical and Computer Engineering Stony Brook University Stony Brook NY United States Center of excellence for Ubiquitous System Ajou University Suwon Korea Republic of

ISBN: (纸本)9781601321190

In this paper, we present a hardhat detection system using colour and contour features. For detecting hardhats, we extract moving objects using our Dynamic Background Modeling method. Then, we determine whether an object is a person or not. For detecting people, we propose a contour-based detection algorithm. After extracting a head of an object, we retrieve colour features from the head image and recognize whether the object is wearing a hardhat or not. In order to improve hardhat detection accuracy, we analyze both RGB and HSV colour coordination information. Our experimental results show high hardhat detection success accuracy.

关键词： Security systems

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Control flow obfuscation with information flow tracking 42

Control flow obfuscation with information flow tracking

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42nd Annual IEEE/ACM International Symposium on Microarchitecture, Micro-42

作者： Chen, Haibo Yuan, Liwei Wu, Xi Zang, Binyu Huang, Bo Yew, Pen-Chung Parallel Processing Institute Fudan University China Intel China Software Center China Department of Computer Science and Engineering University of Minnesota United States

ISBN: (纸本)9781605587981

Recent micro-architectural research has proposed various schemes to enhance processors with additional tags to track various properties of a program. Such a technique, which is usually referred to as information flow tracking, has been widely applied to secure software execution (e.g., taint tracking), protect software privacy and improve performance (e.g., control speculation). In this paper, we propose a novel use of information flow tracking to obfuscate the whole control flow of a program with only modest performance degradation, to defeat malicious code injection, discourage software piracy and impede malware analysis. Specifically, we exploit two common features in information flow tracking: the architectural support for automatic propagation of tags and violation handling of tag misuses. Unlike other schemes that use tags as oracles to catch attacks (e.g., taint tracking) or speculation failures, we use the tags as flow-sensitive predicates to hide normal control flow transfers: the tags are used as predicates for control flow transfers to the violation handler, where the real control flow transfer happens. We have implemented a working prototype based on Itanium processors, by leveraging the hardware support for control speculation. Experimental results show that BOSH can obfuscate the whole control flow with only a mean of 26.7% (ranging from 4% to 59%) overhead on SPECINT2006. The increase in code size and compilation time is also modest. Copyright 2009 ACM.

关键词： Malware

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MDCT for encoding residual signals in frequency domain linear prediction

MDCT for encoding residual signals in frequency domain linea...

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127th Audio engineering Society Convention 2009

作者： Ganapathy, Sriram Motlicek, Petr Hermansky, Hynek Department of Electrical and Computer Engineering Human Language Technology Center of Excellence Johns Hopkins University United States Idiap Research Institute Martigny Switzerland

ISBN: (纸本)9781615677122

Frequency domain linear prediction (FDLP) uses autoregressive models to represent Hilbert envelopes of relatively long segments of speech/audio signals. Although the basic FDLP audio codec achieves good quality of the reconstructed signal at high bit-rates, there is a need for scaling to lower bit-rates without degrading the reconstruction quality. Here, we present a method for improving the compression efficiency of the FDLP codec by the application of the modified discrete cosine transform (MDCT) for encoding the FDLP residual signals. In the subjective and objective quality evaluations, the proposed FDLP codec provides competent quality of reconstructed signal compared to the state-of-the-art audio codecs for the 32 - 64 kbps range.

关键词： Signal encoding

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Designing linear phase FIR filters with particle swarm optimization and harmony search

Designing linear phase FIR filters with particle swarm optim...

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作者： Shirvani, Abdolreza Khezri, Kaveh Razzazi, Farbod Lucas, Caro Computer Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Biomedical Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Electrical Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Electrical and Computer Engineering Department Control and Intelligent Processing Center of Excellence University of Tehran Iran

ISBN: (纸本)9783642105456

In recent years, evolutionary methods have shown great success in solving many combinatorial optimization problems such as FIR (Finite Impulse Response) filter design. An ordinary method in FIR filter design problem is Parks-McClellan, which is both difficult to implement and computationally expensive. The goal of this paper is to design a near optimal linear phase FIR filter using two recent evolutionary approaches;Particle Swarm Optimization (PSO) and Harmony Search (HS). These methods are robust, easy to implement, and they would not trap in local optima due to their stochastic behavior. In addition, they have distinguishing features such as less variance error and smaller overshoots in both stop and pass bands. To prove these benefits, two case studies are presented and obtained results are compared with previous implementations. In both cases, better and reliable results are achieved. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： FIR filters

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Implementing a high-volume, low-latency market data processing system on commodity hardware using IBM middleware

Implementing a high-volume, low-latency market data processi...

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2nd Workshop on High Performance Computational Finance, WHPCF '09

作者： Zhang, Xiaolan J. Andrade, Henrique Gedik, Buǧra King, Richard Morar, John Nathan, Senthil Park, Yoonho Pavuluri, Raju Pring, Edward Schnier, Randall Selo, Philippe Spicer, Michael Uhlig, Volkmar Venkatramani, Chitra IBM Watson Research Center IBM Software Group United States Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign IL United States

ISBN: (纸本)9781605587165

A stock market data processing system that can handle high data volumes at low latencies is critical to market makers. Such systems play a critical role in algorithmic trading, risk analysis, market surveillance, and many other related areas. We show that such a system can be built with general-purpose middleware and run on commodity hardware. The middleware we use is IBM System S, which has been augmented with transport technology from IBM WebSphere MQ Low Latency Messaging. Using eight commodity x86 blades connected with Ethernet and Infiniband, this system can achieve 80 μsec average latency at 3 times the February 2008 options market data rate and 206 μsec average latency at 15 times the February 2008 rate. Copyright © 2009 ACM.

关键词： Middleware

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A new fuzzing technique for software vulnerability mining

A new fuzzing technique for software vulnerability mining

引用

International Conference on software engineering, CONSEG 2009

作者： Wu, Zhiyong Atwood, J. William Zhu, Xueyong Network Information Center University of Science and Technology of China Hefei Anhui China Department of Computer Science and Software Engineering Concordia University Montreal QC Canada

Test case mutation and generation (m&g) based on data samples is a n effective way to generate test cases for Knowledge-based fuzzing, but present m&g technique is only capable of one-dimensional m&g at a time based on a data sample and thus it is impossible to find a vulnerability that can only be detected by multidimensional m&g. This paper proposes a mathematical model FTSG that formally describes Fuzzing Test Suite Generation based on m&g, and can process multidimension input elements m&g, which is done by a Genetic Algorithm Mutation operator (GAMutator). By executionoriented input-output (I/O) analysis, the influence relationships between input elements and insecure functions in target application were collected. Based on these relationships, GAMutator can directly mutate corresponding input elements to trigger the suspected vulnerability in a target insecure function, which could never been found by one-dimension m&g fuzzing. Importantly, GAMutator does not bring the input combination explosion, and the number of test cases it generates is linear with the number of insecure functions. Finally, an experiment on Libpng has proved that FTSG could effectively enrich the ability of knowledge-based fuzzing technique to find vulnerabilities.

关键词： Genetic algorithms

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Work in progress - Outreach and retention in the university of utah engineering programs

Work in progress - Outreach and retention in the university ...

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39th Annual Frontiers in Education Conference: Imagining and engineering Future CSET Education, FIE 2009

作者： Bergerson, Amy Aldous Furse, Cynthia Department of Educational Leadership and Policy University of Utah United States Department of Undergraduate Studies United States Center of Excellence for Smart Sensors Department of Electrical and Computer Engineering University of Utah United States

ISBN: (纸本)9781424447152

For several decades, college student retention research has focused on the importance of engaging college students in their higher education environment as a tool for helping them attain their degrees. Student Affairs administrators across the United States have incorporated the idea of engagement in their programs and services to increase student retention. This work in progress paper describes how the College of engineering at the University of Utah has incorporated the concept of engagement into its retention efforts in response to a shortage of engineers in the state. Engagement efforts in this National Science Foundation funded project include participation in outreach teams, facilitating a summer innovation summit, participating in learning community courses, and implementing service learning. The paper focuses on unique elements of the program, incorporating qualitative evaluation data from the first year of the project to describe how lessons learned have shaped second year efforts. © 2009 IEEE.

关键词： engineering education

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Protecting location privacy through identity diffusion

Protecting location privacy through identity diffusion

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2009 International Conference on Ultra Modern Telecommunications and Workshops

作者： Wang, Lingyan Wu, Shaoen Computer Science and Software Engineering Department Auburn University Shelby Center for Engineering Technology AL 36849-5347 United States School of Computing University of Southern Mississippi 118 College Drive Hattiesburg MS 39406 United States

ISBN: (纸本)9781424439416

With the proliferation of new online services and wireless personal devices, location-based services and applications for mobile users are widespread in use today. But the privacy of these users exposes to others increasingly in accessing those location based services. Exposure of the location information may result in privacy threat by malicious servers and hackers. In this paper, we propose a new framework that mobile users can enjoy conveniently the services provided by location-based server (LBS), and also protect their location information. This framework prevents mobile users' location information from exposing in two ways: providing the server with fake identities;two different ways of diffusing a number of fake queries with the real query hidden when and where it was issued.

关键词： Location based services

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Integrated model of IGF-I mediated biosynthesis in a deformed articular cartilage

Integrated model of IGF-I mediated biosynthesis in a deforme...

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作者： Zhang, Lihai Gardiner, Bruce Stuart Smith, David Wamsley Pivonka, Peter Grodzinsky, Alan Jay Department of Civil and Environmental Engineering University of Melbourne Melbourne VIC 3010 Australia Engineering Computational Biology Group School of Computer Science and Software Engineering The University of Western Australia Crawley WA 6009 Australia Faculty of Engineering Computing and Mathematics The University of Western Australia 35 Stirling Highway Crawley WA 6009 Australia Center for Biomedical Engineering Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 United States

Maintenance of articular cartilage's functional mechanical properties ultimately depends on the balance between the extracellular matrix component biosynthesis, degradation, and loss. A variety of factors are known to modulate the rate of cartilage matrix synthesis (e.g., growth factors and stress/strain environment). In the present study, we develop an integrated mathematical model that quantifies biological processes within cartilage tissue modulated by insulin-like growth factors (IGFs). Specifically, the model includes IGF transport through a deforming porous media, competitive binding to binding proteins and cell receptors, and matrix macromolecule biosynthesis - particularly glycosaminoglycans (GAGs). These newly synthesized matrix molecules are then able to modify the material properties of cartilage. The model is used to investigate the effect of synovial fluid IGF-I concentration on cartilage homeostasis. The results presented here suggest that GAG production can be rapidly "switched on" when the concentration of IGF-I reaches a certain threshold, while it is predicted that high receptor concentration leads to heterogeneous matrix production. As for the combined effect of IGF-I and mechanical loading on biosynthesis, the current model predicts that a loading regime with high strain magnitude (e.g., 10%) can achieve a synergistic effect on matrix protein production. Furthermore, dynamic loading is seen to promote spatial homogeneous GAG production. © 2009 ASCE.

关键词： Biosynthesis

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Automatic segmentation of brain structures using geometric moment invariants and artificial neural networks

Automatic segmentation of brain structures using geometric m...

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21st International Conference on Information Processing in Medical Imaging, IPMI 2009

作者： Jabarouti Moghaddam, Mostafa Soltanian-Zadeh, Hamid Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Hospital Detroit MI United States

ISBN: (纸本)3642024971

We propose an automatic method for the segmentation of the brain structures in three dimensional (3D) Magnetic Resonance Images (MRI). The proposed method consists of two stages. In the first stage, we represent the shape of the structure using Geometric Moment Invariants (GMIs) in 8 scales. For each scale, an Artificial Neural Network (ANN) is designed to approximate the signed distance function of a desired structure. The GMIs along with the voxel intensities and coordinates are used as the input features of the ANN and the signed distance function as its output. In the second stage, we combine the outputs of the ANNs of the first stage and design another ANN to classify the image voxels into two classes, inside or outside of the structure. We introduce a fast method for moment calculations. The proposed method is applied to the segmentation of caudate, putamen, and thalamus in MRI where it has outperformed other methods in the literature. © 2009 Springer Berlin Heidelberg.

关键词： Neural networks

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