ppxscal/embedding_network huggingface dataset:
Major cast detection in video using both audio and visual information
Authors: Zhu Liu
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2001. on IEEE International Conference - Volume 03 (2001)

Major casts, for example, the anchor persons or reporters in news broadcast programs and principle characters in movies play an important role in video, and their occurrences provide good indices for organizing and presenting video content. This paper describes a new approach for automatically generating the list of major casts in a video sequence based on multiple modalities, specifically, both speaker and face information. A list of major casts is created and ordered by the accumulative temporal and spatial presence of corresponding casts. Preliminary simulation results show that the detected major casts are meaningful and the proposed approach is promising.
A new interference cancellation receiver in fading channels
Authors: Mingshu Wang, Jianhua Lu, Zucheng Zhou, Jianfeng Wang
Venue: Proceedings of the The 8th International Conference on Communication Systems - Volume 01 (2002)

This paper proposes an improved interference cancellation (IC) receiver for the up-link of code division multiple access (CDMA) systems. This receiver employs a decorrelating based hybrid interference cancellation (DHIC), which combines the advantages of successive interference cancellation (SIC), partial parallel interference cancellation (PPIC) and linear decorrelating, while combating the fading effects in mobile channels effectively. Simulation results show that the proposed DHIC receiver has better bit error rate (BER) performance and relatively lower complexity than the conventional SIC and PPIC in fading channels.
The MoR-Trust Distributed Trust Management System: Design and Simulation Results
Authors: Stephanos Androutsellis-Theotokis, Diomidis Spinellis, Vasileios Vlachos
Venue: Electronic Notes in Theoretical Computer Science (ENTCS) (2007)

MoR-Trust is a purely decentralized peer-to-peer trust management system, targeted towards networks and applications supporting transactions or collaborations of a quantitative nature. MoR-Trust is based on the notion of expressing trust in terms of monetary units, thus directly coupling the trust estimates circulated in the network with the values of the transactions taking place and their outcomes. We have validated our design decisions and algorithms through simulation. The results indicate that our system converges towards a small error in the trust estimates distributed throughout the network.
Libra: a library operating system for a jvm in a virtualized execution environment
Authors: Glenn Ammons, Jonathan Appavoo, Maria Butrico, Dilma Da Silva, David Grove, Kiyokuni Kawachiya, Orran Krieger, Bryan Rosenburg, Eric Van Hensbergen, Robert W. Wisniewski
Venue: Proceedings of the 3rd international conference on Virtual execution environments (2007)

If the operating system could be specialized for every application, many applications would run faster. For example, Java virtual machines (JVMs) provide their own threading model and memory protection, so general-purpose operating system implementations of these abstractions are redundant. However, traditional means of transforming existing systems into specialized systems are difficult to adopt because they require replacing the entire operating system. This paper describes Libra, an execution environment specialized for IBM's J9 JVM. Libra does not replace the entire operating system. Instead, Libra and J9 form a single statically-linked image that runs in a hypervisor partition. Libra provides the services necessary to achieve good performance for the Java workloads of interest but relies on an instance of Linux in another hypervisor partition to provide a networking stack, a filesystem, and other services. The expense of remote calls is offset by the fact that Libra's services can be customized for a particular workload; for example, on the Nutch search engine, we show that two simple customizations improve application throughput by a factor of 2.7.
EXOCHI: architecture and programming environment for a heterogeneous multi-core multithreaded system
Authors: Perry H. Wang, Jamison D. Collins, Gautham N. Chinya, Hong Jiang, Xinmin Tian, Milind Girkar, Nick Y. Yang, Guei-Yuan Lueh, Hong Wang
Venue: Proceedings of the 2007 ACM SIGPLAN conference on Programming language design and implementation (2007)

Future mainstream microprocessors will likely integrate specialized accelerators, such as GPUs, onto a single die to achieve better performance and power efficiency. However, it remains a keen challenge to program such a heterogeneous multicore platform, since these specialized accelerators feature ISAs and functionality that are significantly different from the general purpose CPU cores. In this paper, we present EXOCHI: (1) Exoskeleton Sequencer(EXO), an architecture to represent heterogeneous acceleratorsas ISA-based MIMD architecture resources, and a shared virtual memory heterogeneous multithreaded program execution model that tightly couples specialized accelerator cores with generalpurpose CPU cores, and (2) C for Heterogeneous Integration(CHI), an integrated C/C++ programming environment that supports accelerator-specific inline assembly and domain-specific languages. The CHI compiler extends the OpenMP pragma for heterogeneous multithreading programming, and produces a single fat binary with code sections corresponding to different instruction sets. The runtime can judiciously spread parallel computation across the heterogeneous cores to optimize performance and power. We have prototyped the EXO architecture on a physical heterogeneous platform consisting of an Intel® Core™ 2 Duo processor and an 8-core 32-thread Intel® Graphics Media Accelerator X3000. In addition, we have implemented the CHI integrated programming environment with the Intel® C++ Compiler, runtime toolset, and debugger. On the EXO prototype system, we have enhanced a suite of production-quality media kernels for video and image processing to utilize the accelerator through the CHI programming interface, achieving significant speedup (1.41X to10.97X) over execution on the IA32 CPU alone.
Complexity of ambient intelligence in managerial work
Authors: Vladimír Burea, Pavel Čech
Venue: ACM SIGCSE Bulletin (2007)

Recently, ambient intelligence a vision of information society of the future has become the subject of attention of many theorists and practitioners. The achievement of ambient intelligence postulates an adequate shift in thinking. The shift in thinking concerns also managerial work. The paper presents on field experience on how to test the meaningfulness of teaching systems thinking for managers.
Autograph: toward automated, distributed worm signature detection
Authors: Hyang-Ah Kim, Brad Karp
Venue: Proceedings of the 13th conference on USENIX Security Symposium - Volume 13 (2004)

Today's Internet intrusion detection systems (IDSes) monitor edge networks' DMZs to identify and/or filter malicious flows. While an IDS helps protect the hosts on its local edge network from compromise and denial of service, it cannot alone effectively intervene to halt and reverse the spreading of novel Internet worms. Generation of the worm signatures required by an IDS--the byte patterns sought in monitored traffic to identify worms--today entails non-trivial human labor, and thus significant delay: as network operators detect anomalous behavior, they communicate with one another and manually study packet traces to produce a worm signature. Yet intervention must occur early in an epidemic to halt a worm's spread. In this paper, we describe Autograph, a system that automatically generates signatures for novel Internet worms that propagate using TCP transport. Autograph generates signatures by analyzing the prevalence of portions of flow payloads, and thus uses no knowledge of protocol semantics above the TCP level. It is designed to produce signatures that exhibit high sensitivity (high true positives) and high specificity (low false positives); our evaluation of the system on real DMZ traces validates that it achieves these goals. We extend Autograph to share port scan reports among distributed monitor instances, and using trace-driven simulation, demonstrate the value of this technique in speeding the generation of signatures for novel worms. Our results elucidate the fundamental trade-off between early generation of signatures for novel worms and the specificity of these generated signatures.
A Robust Decentralized Job Scheduling Approach for Mobile Peers in Ad-hoc Grids
Authors: Karin Anna Hummel, Gerda Jelleschitz
Venue: Proceedings of the Seventh IEEE International Symposium on Cluster Computing and the Grid (2007)

The increasing capabilities and spreading of mobile technology raise the opportunity to integrate potentially unstable mobile devices as resources into grids. In this work, we contribute by proposing and evaluating a robust decentralized job scheduling approach for mobile peers forming an ad-hoc grid. The scheduling approach is based on a first come first serve strategy executed locally by each peer. Additionally, the peer performs matchmaking between a job's requirements and the device's capabilities autonomously. Coordination between mobile peers is based on job queues shared within a distributed virtual shared memory (VSM). By applying proactive and reactive fault tolerance mechanisms we were able to increase the robustness of the scheduler. A prototypical implementation using the VSM CORSO, Java, and Condor ClassAds demonstrates the feasibility of our approach. The conducted experiments show that the job loss ratio and the average job response time can be decreased by adding fault tolerance mechanisms.
Generalized square-root adaptive algorithms
Authors: M. Bhouri
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 01 (2000)

We extend the QR-based recursive least squares algorithms to a more general square-root formulation, which involves array transforms using orthogonal and possibly non-orthogonal transforms e.g. Gauss transform. The adaptive algorithms, thus obtained, have better numerical properties than the traditional pseudo-inverse-based algorithms. This new update scheme covers an extended set of algorithms; it connects the recursive least squares to gradient based algorithms. Moreover, we show that the previously derived block diagonal QR based algorithms belongs to this general square-root class. The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
Analysis of Dynamic Source Routing and Destination-Sequenced Distance-Vector Protocols for Different Mobility Models
Authors: Bhavyesh Divecha, Ajith Abraham, Crina Grosan, Sugata Sanyal
Venue: Proceedings of the First Asia International Conference on Modelling & Simulation (2007)

A Mobile Ad-Hoc Network (MANET) is self-configuring network of mobile nodes connected by wireless links to form an arbitrary topology without the use of existing infrastructure. In this paper, we have studied the effects of various mobility models on the performance of two routing protocols Dynamic Source Routing (DSR-Reactive Protocol) and Destination-Sequenced Distance-Vector (DSDV-Proactive Protocol). For experiment purposes, we have considered four mobility scenarios: Random Wayward Mobility, Group Mobility, Freeway and Manhattan models. These four Mobility Models are selected to represent the possibility of practical application in future. Performance comparison has also been conducted across varying node densities and number of hops. Experiment results illustrate that performance of the routing protocol varies across different mobility models, node densities and length of data paths.
HCI reality-an 'Unreal Tournament'?
Authors: Christoph Bartneck, Matthias Rauterberg
Venue: International Journal of Human-Computer Studies (2007)

The cooperation between designers, engineers and scientists in the human-computer interaction (HCI) community is often difficult, and can only be explained by investigating the different paradigms by which they operate. This study proposes a paradigm model for designers, engineers and scientists, using three barriers to separate the professions. We then report on an empirical study that attempted to validate the understand/transform world barrier in the paradigm model using an online questionnaire. We conclude that the used 'Attitude About Reality' scale was unsuitable for measuring this barrier, whereas information about the educational background of the participants was a good predictor for the self-reported profession (designer, engineer or scientist). Interestingly, among the three professions, engineers appear to be the cohesive element, since they often have dual backgrounds, whereas very few participants had dual science/design backgrounds. Engineers could, therefore, build a bridge between designers and scientists, and through their integrative role, could guide the HCI community to realizing its full potential.
Fault-Tolerant CORBA: From Specification to Reality
Authors: Priya Narasimhan
Venue: Computer (2007)

The Fault-Tolerant CORBA standard consists of interface specifications, but lacks real-world applicability.
Towards a Mobile Peer-to-Peer Service Platform
Authors: Wolfgang Kellerer, Zoran Despotovic, Maximilian Michel, Quirin Hofstatter, Stefan Zols
Venue: Proceedings of the 2007 International Symposium on Applications and the Internet Workshops (2007)

Peer-to-Peer (P2P) technology is regarded as being disruptive for traditional fixed and mobile operators. However, it can also be considered as an opportunity for new ways of service provisioning. On the one hand, P2P concepts allow a more efficient usage of existing platform resources through relying on existing infrastructure including even the customer equipment and thus provide a cheap service platform. On the other hand, P2P technology brings new business opportunities through extending the service portfolio to user provided services and to ubiquitous environments. Along these lines, we outline in this paper the requirements and building blocks for a P2P based service platform for mobile environments. In addition to P2P lookup and information distribution, these building blocks include reliability, controllability, bootstrapping, reputation management, which address operator specific requirements in particular. Mobile networks pose severe challenges to a P2P service platform in terms of heterogeneous devices and access connections and frequent user joins and leaves. We present a hierarchical P2P system as a core component for a P2P service platform addressing those problems.
Automated sub-cellular phenotype classification: an introduction and recent results
Authors: N. Hamilton, R. Pantelic, K. Hanson, J. L. Fink, S. Karunaratne, R. D. Teasdale
Venue: Proceedings of the 2006 workshop on Intelligent systems for bioinformatics - Volume 73 (2006)

The genomic sequencing revolution has led to rapid growth in sequencing of genes and proteins, and attention is now turning to the function of the encoded proteins. In this respect, microscope imaging of a protein's subcellular location is proving invaluable. High-throughput methods mean that it is now possible to capture images of hundreds of protein localisations quickly and relatively inexpensively, and hence genome-wide protein localisation studies are becoming feasible. However, to a large degree the analysis and localisation classification are still performed by the slow, coarse-grained and possibly biased process of manual inspection. As a step towards dealing with the fast growth in subcellular image data the Automated Sub-cellular Classification system (ASPiC) has been developed: a pipeline for taking cell images, generating statistics and classifying using SVMs. Here, the pipeline is described and correct classification rates of 93.5% and 86.5% on two 8-class subcellular localisation datasets are reported. In addition we present a survey of other important applications of cell image statistics. The complete image sets are being made available with the aim of encouraging further research into automated cell image analysis and classification.
Safety and Software Intensive Systems: Challenges Old and New
Authors: Mats P. E. Heimdahl
Venue: 2007 Future of Software Engineering (2007)

There is an increased use of software in safety-critical systems; a trend that is likely to continue in the future. Although traditional system safety techniques are applicable to software intensive systems, there are new challenges emerging. In this report we will address four issues we believe will pose challenges in the future. First, the nature of safety is continuing to be widely misunderstood and known system safety techniques are not applied. Second, our ability to demonstrate (certify) that safety requirements have been met is inadequate. Third, modeling and automated tools, for example, code generation and automated testing, are introduced in a hope to increase productivity; this reliance on tools rather than people, however, introduces new and poorly understood problems. Finally, safety-critical systems are increasingly relying on data (configuration data or databases), incorrect data could have catastrophic and widespread consequences.
Coprime-factorized Model Predictive Control for Unstable Processes with Delay
Authors: Igor Škrjanc
Venue: Journal of Intelligent and Robotic Systems (2007)

This paper presents coprime-factorized model predictive control. The main idea of the proposed approach is in process-output prediction based on a coprime-factorized process model. The proposed approach provides a framework to design the control for a wide range of processes such as: higher order, phase non-minimal, unstable and also multivariable. In the paper the coprime-factorized predictive design methodology was studied and implemented on unstable processes with a time-delay which are very difficult to control. The proposed methodology leads to a simple analytical control law, which results in much better performance than previously known control methods.
What Kind of Curriculum Can Better Address Community Needs? Problems Arisen by Hypothetical-Deductive Reasoning
Authors: A. Haeri, P. Hemmati, H. Yaman
Venue: Journal of Medical Systems (2007)

The aim of this study was to identify problems arisen by conventional curricula, the guidelines for development of an appropriate educational model for 21st century, and the advantages and disadvantages of the last two curricular models. The medical education literature published from 1995 through 2002 of four reputable journals in medical education were searched (Academic Medicine, Teaching and Learning in Medicine, Medical Education, and Medical Teacher). First the possibly best articles were identified. During the second screening process 76 of 180 articles were found to be highly relevant to our questions. A review of the chosen articles revealed a concept map which starts from currently applied hypothetical-deductive reasoning (HDR)-based curricula in many medical schools all around the world. Results revelaed that continuing cyclical process might be time consuming, enhance burden of faculty and might be stressful for students involved. Current issues in health care system are possibly attributable to current HDR-based curricular models including PBL. Advantages of reiterative PBL theory can not be denied, but it appears that its limited application should be mainly seen in some academic classes to develop some generic transferable skills simultaneously with other teaching methods. Therefore vast application of HDR in clinical settings is not recommended according to our study. However the relationships demonstrated between factors and outcomes mentioned in the concept map can be used to run some new studies to test some hypotheses.
Spectral Difference Method for Unstructured Grids II: Extension to the Euler Equations
Authors: Z. J. Wang, Yen Liu, Georg May, Antony Jameson
Venue: Journal of Scientific Computing (2007)

An efficient, high-order, conservative method named the spectral difference method has been developed recently for conservation laws on unstructured grids. It combines the best features of structured and unstructured grid methods to achieve high-computational efficiency and geometric flexibility; it utilizes the concept of discontinuous and high-order local representations to achieve conservation and high accuracy; and it is based on the finite-difference formulation for simplicity. The method is easy to implement since it does not involve surface or volume integrals. Universal reconstructions are obtained by distributing solution and flux points in a geometrically similar manner for simplex cells. In this paper, the method is further extended to nonlinear systems of conservation laws, the Euler equations. Accuracy studies are performed to numerically verify the order of accuracy. In order to capture both smooth feature and discontinuities, monotonicity limiters are implemented, and tested for several problems in one and two dimensions. The method is more efficient than the discontinuous Galerkin and spectral volume methods for unstructured grids.
On Syntactic Composability and Model Reuse
Authors: Claudia Szabo, Yong Meng Teo
Venue: Proceedings of the First Asia International Conference on Modelling & Simulation (2007)

Composability, the capability to select and assemble off-the- shelf model components in various combinations to satisfy user requirements, is an appealing approach in reducing the time and costs of developing complex simulation. This paper discusses CODES, a hierarchical component framework to support component-based modeling and simulation. We propose the use of EBNF based grammars to specify syntactic composability rules with the aims of achieving syntax consistency for model components to operate together. EBNF production strings associated with each composed models are transformed into a unique identifier to support distributed DHT-based model discovery. The hierarchical design supports the sharing and reuse of models and model components across application domains, and facilitates the verification of composed models. We present a prototype of the framework implemented using the Scalable Simulation Framework, and illustrate this approach by modeling a grid computing system.
Construct Low-Cost Multi-Projector Tiled Display System for Marine Simulator
Authors: Xiuwen Liu, Cui Xie, Yicheng Jin, Yong Yin
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

Large high-resolution displays have been widely applied in various applications, such as entertainment, scientific visualization, high-fidelity collaborative environments, etc. A popular way to realize such displays is to tile multi-projector together to construct one large size display. In this paper, a low-cost multi-projector seamless tiled display system is constructed using commodity hardware and two-pass rendering technology for the marine simulator. The main technological problems of the display system are discussed, including geometry distortion adjustment and edge blending. Experimental results in marine simulator show that this framework is very cost-effective.