ppxscal/embedding_network huggingface dataset:
A Bayesian game approach for intrusion detection in wireless ad hoc networks
Authors: Yu Liu, Cristina Comaniciu, Hong Man
Venue: Proceeding from the 2006 workshop on Game theory for communications and networks (2006)

In wireless ad hoc networks, although defense strategies such as intrusion detection systems (IDSs) can be deployed at each mobile node, significant constraints are imposed in terms of the energy expenditure of such systems. In this paper, we propose a game theoretic framework to analyze the interactions between pairs of attacking/defending nodes using a Bayesian formulation. We study the achievable Nash equilibrium for the attacker/defender game in both static and dynamic scenarios. The dynamic Bayesian game is a more realistic model, since it allows the defender to consistently update his belief on his opponent's maliciousness as the game evolves. A new Bayesian hybrid detection approach is suggested for the defender, in which a lightweight monitoring system is used to estimate his opponent's actions, and a heavyweight monitoring system acts as a last resort of defense. We show that the dynamic game produces energy-efficient monitoring strategies for the defender, while improving the overall hybrid detection power.
Person Reidentification Using Spatiotemporal Appearance
Authors: Niloofar Gheissari, Thomas B. Sebastian, Richard Hartley
Venue: Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2 (2006)

In many surveillance applications it is desirable to determine if a given individual has been previously observed over a network of cameras. This is the person reidentification problem. This paper focuses on reidentification algorithms that use the overall appearance of an individual as opposed to passive biometrics such as face and gait. Person reidentification approaches have two aspects: (i) establish correspondence between parts, and (ii) generate signatures that are invariant to variations in illumination, pose, and the dynamic appearance of clothing. A novel spatiotemporal segmentation algorithm is employed to generate salient edgels that are robust to changes in appearance of clothing. The invariant signatures are generated by combining normalized color and salient edgel histograms. Two approaches are proposed to generate correspondences: (i) a model based approach that fits an articulated model to each individual to establish a correspondence map, and (ii) an interest point operator approach that nominates a large number of potential correspondences which are evaluated using a region growing scheme. Finally, the approaches are evaluated on a 44 person database across 3 disparate views.
Inside discrete-event simulation software: how it works and why it matters
Authors: Thomas J. Schriber, Daniel T. Brunner
Venue: Proceedings of the 36th conference on Winter simulation (2004)

This paper provides simulation practitioners and consumers with a grounding in how discrete-event simulation software works. Topics include discrete-event systems; entities, resources, control elements and operations; simulation runs; entity states; entity lists; and entity-list management. The implementation of these generic ideas in AutoMod, SLX, and Extend is described. The paper concludes with several examples of "why it matters" for modelers to know how their simulation software works, including coverage of SIMAN (Arena), ProModel, and GPSS/H as well as the other three tools.
An MEG Study of Picture Naming
Authors: Willem J. M. Levelt, Peter Praamstra, Antje S. Meyer, Päivi Helenius, Riitta Salmelin
Venue: Journal of Cognitive Neuroscience (1998)

The purpose of this study was to relate a psycholinguistic processing model of picture naming to the dynamics of cortical activation during picture naming. The activation was recorded from eight Dutch subjects with a whole-head neuromagnetometer. The processing model, based on extensive naming latency studies, is a stage model. In preparing a picture's name, the speaker performs a chain of specific operations. They are, in this order, computing the visual percept, activating an appropriate lexical concept, selecting the target word from the mental lexicon, phonological encoding, phonetic encoding, and initiation of articulation. The time windows for each of these operations are reasonably well known and could be related to the peak activity of dipole sources in the individual magnetic response patterns. The analyses showed a clear progression over these time windows from early occipital activation, via parietal and temporal to frontal activation. The major specific findings were that (1) a region in the left posterior temporal lobe, agreeing with the location of Wernicke's area, showed prominent activation starting about 200 msec after picture onset and peaking at about 350 msec, (i.e., within the stage of phonological encoding), and (2) a consistent activation was found in the right parietal cortex, peaking at about 230 msec after picture onset, thus preceding and partly overlapping with the left temporal response. An interpretation in terms of the management of visual attention is proposed.
Combined Transmitter Diversity and Multi-Level Modulation Techniques
Authors: Slimane Ben Slimane
Venue: Wireless Personal Communications: An International Journal (2006)

Orthogonal transmitter diversity such as frequency diversity and time diversity is quite simple to implement and, with optimum signal combining, can take full advantage of fading multipath channels. However, such a scheme has a bandwidth efficiency that decreases inversely with the number of diversity branches making it less attractive in wireless communications applications. This paper considers combined orthogonal transmitter diversity and multi-level linear modulation techniques. The idea is to view the signal constellations of the modulation scheme in an augmented signal space formed by the modulation signal dimension and the number of branches of the transmitter diversity scheme. This augmented signal space provides a good spread for the modulation signal points and can be quite efficient for high-level linear modulation techniques. The obtained results show that this combined scheme, not only improves the system performance on both additive white Gaussian noise and fading multipath channels, but also improves the bandwidth efficiency of orthogonal transmitter diversity.
Improvement of the Combined AMC-MIMO Systems with Independent MCS Level Selection
Authors: Sangjin Ryoo, Kwangwook Choi, Kyunghwan Lee, Hoyeon Kim, Mingoo Kang, Intae Hwang, Cheolsung Kim
Venue: Proceedings of the 2006 International Conference on Hybrid Information Technology - Volume 02 (2006)

In this paper, we propose and observe a system that adopts Independent MCS (Modulation and Coding Scheme) level for each layer in the combined AMC-V-BLAST (Adaptive Modulation and Coding-Vertical-Bell-lab Layered Space-Time) system. Also, comparing with the combined system using Common MCS level, we observe how much throughput performance is improved. As a result of simulation, Independent MCS level case adapts modulation and coding scheme for maximum throughput to each channel condition in separate layer, resulting in improved throughput compared to Common MCS level case. Especially, the results show that the combined AMC-V-BLAST system with Independent MCS level achieves a gain of 700kbps in 7~9dB SNR (Signal-to-Noise Ratio) range.
FO[\le]-Uniformity
Authors: Christoph Behl, Klaus-Jorn Lange
Venue: Proceedings of the 21st Annual IEEE Conference on Computational Complexity (2006)

Uniformity notions more restrictive than the usual FO[\le,+, ]-uniformity = FO[\le,Bit]-uniformity are introduced. It is shown that the general framework exhibited by Barrington et al. still holds if the fan-in of the gates in the corresponding circuits is considered.
Global Information Health Networks Get a Boost
Authors: Greg Goth
Venue: IEEE Distributed Systems Online (2006)

IBM and about 20 organizations, including the World Health Organization and the US Centers for Disease Control and Prevention, announced the Global Pandemic Initiative in May 2006. IBM pledged to contribute several pieces of its health care technology portfolio to the open source community to help launch the initiative's work. However, progress toward electronic health records and networks that could support population-based applications is moving slowly among national government agencies, especially in the US.
Flexible Media Processing in Resource Constrained Real-Time Systems
Authors: Damir Isovic
Venue: Proceedings of the Eighth IEEE International Symposium on Multimedia (2006)

In this paper we propose real-time methods for flexible processing of MPEG-2 video in resource constrained systems. The video stream is adapted to resource fluctuations by using a quality-aware frame skipping approach which keeps the video frames that have the most impact on the overall video quality. Real-time admission control and resource reservation mechanisms ensure that video processing applications adapt Quality-of-Service at run-time according to current state of the system, while fully utilizing the available resources.
Information Retrieval in the Multimedia Educational Resources Database System
Authors: Chun-xiang Wu, Xiao-jian Li, Shi-hong Chen
Venue: Proceedings of the International Conference on Computational Inteligence for Modelling Control and Automation and International Conference on Intelligent Agents Web Technologies and International Commerce (2006)

Long-distance education is a very important teaching method now. The foundation of the longdistance is the construction of educational resources database. The key work of constructing resources database is to structure an appropriate index. The paper studies the representation of the characters of multimedia educational resources and the relations between the hierarchy characters. A hierarchy index is built to satisfy all kinds of queries to the educational resources database system. The subject ontology is used to get a standard annotation of the resources and a standard description of the query requirement. The subject ontology is also used to extend the semantics of the query requirement. And the mapping rules of the hierarchy characters provide a way to represent the semantics of the resource automatically.
Applying ontologies in the integration of heterogeneous relational databases
Authors: Adriana S. Aparício, Oscar L. M. Farias, Neide dos Santos
Venue: Proceedings of the 2005 Australasian Ontology Workshop - Volume 58 (2005)

Interoperability is a key point for integrating heterogeneous computing systems. A usual approach proposes the integration of the conceptual databases schemes into a global conceptual scheme, to resolve syntactic and structural heterogeneity. Moreover, semantic problems can remain. Ontologies have been largely designated to overcome semantic heterogeneity. We propose the specification of a formal ontology about the specific knowledge domain to be shared among several database systems build a posteriori of the ontology specification. We reach this integration through a global scheme, developed as a software layer among the databases under consideration. To test this approach we elaborated a case study, based upon hypothetical queries submitted to heterogeneous databases, with data on soil domain, to identify the soil most appropriate to a certain culture. The results are promising, but crucial, in our approach, is the acceptance for a given community of a common vocabulary and its relationships and that are captured by the ontology and transformed to the target conceptual models.
SVM-KNN: Discriminative Nearest Neighbor Classification for Visual Category Recognition
Authors: Hao Zhang, Alexander C. Berg, Michael Maire, Jitendra Malik
Venue: Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2 (2006)

We consider visual category recognition in the framework of measuring similarities, or equivalently perceptual distances, to prototype examples of categories. This approach is quite flexible, and permits recognition based on color, texture, and particularly shape, in a homogeneous framework. While nearest neighbor classifiers are natural in this setting, they suffer from the problem of high variance (in bias-variance decomposition) in the case of limited sampling. Alternatively, one could use support vector machines but they involve time-consuming optimization and computation of pairwise distances. We propose a hybrid of these two methods which deals naturally with the multiclass setting, has reasonable computational complexity both in training and at run time, and yields excellent results in practice. The basic idea is to find close neighbors to a query sample and train a local support vector machine that preserves the distance function on the collection of neighbors. Our method can be applied to large, multiclass data sets for which it outperforms nearest neighbor and support vector machines, and remains efficient when the problem becomes intractable for support vector machines. A wide variety of distance functions can be used and our experiments show state-of-the-art performance on a number of benchmark data sets for shape and texture classification (MNIST, USPS, CUReT) and object recognition (Caltech- 101). On Caltech-101 we achieved a correct classification rate of 59.05%(±0.56%) at 15 training images per class, and 66.23%(±0.48%) at 30 training images.
A Novel Way of Determining the Optimal Location of a Fragment in a DDBS: BGBR
Authors: Ashkan Bayati, Pedram Ghodsnia, Maseud Rahgozar, Reza Basseda
Venue: Proceedings of the International Conference on Systems and Networks Communication (2006)

This paper addresses the problem of determining the optimal location to place a fragment (object) in a distributed non-replicated database. The algorithm defined takes into consideration a changing environment with changing access patterns. This paper contributes by allocating data fragments to their optimal location, in a distributed network, based on the access patterns for that fragment. The mechanism for achieving this optimality relies on knowing the costs involved in moving data fragments from one site to the other. Embedded into the algorithm is a mechanism to prioritize fragments so that if there is a limited space on a specific node where many fragments are chosen to be allocated the ones with higher priority are placed before the lower priority fragments.
How to Solve a Cubic Equation, Part 2: The 11 Case
Authors: James F. Blinn
Venue: IEEE Computer Graphics and Applications (2006)

Jim Blinn discusses a good practical closed-form solution process for cubic equations and makes some observations about the relation between iterative and closed-form solutions.
Using Ontology Visualization to Coordinate Cross-species Functional Annotation for Human Disease Genes
Authors: Mary E. Dolan, Judith A. Blake
Venue: Proceedings of the 19th IEEE Symposium on Computer-Based Medical Systems (2006)

Biomedical ontologies provide a representational system to support the integration and retrieval of biological knowledge. The Gene Ontology (GO) is widely used to annotate molecular attributes of genes and provides a common paradigm for comparative functional analysis research. One way to expand the view of the function of any one gene product is to compare annotations of genes that share close evolutionary relationships and are likely to function in similar ways, such as orthologous genes. We are exploring the power of the GO and orthology sets to provide a comprehensive view of annotations coordinated across species by presenting annotations visualized within the ontology relationship structure. This work describes the application of our ontology visualization approach to a set of model organism genes that are orthologous to human disease genes.
Unconstrained motion compensated temporal filtering (UMCTF) framework for wavelet video coding
Authors: M. van der Schaar, D. S. Turaga
Venue: Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 1 (2003)

This paper presents a new framework for adaptive temporal filtering in wavelet interframe codecs, called the unconstrained motion compensated temporal filtering (UMCTF). This framework allows flexible and efficient temporal filtering by combining the best features of motion compensation, used in predictive coding, with the advantages of interframe scalable wavelet video coding schemes. UMCTF provides higher coding efficiency, improved visual quality and flexibility of temporal and spatial scalability, higher coding efficiency and tower decoding delay than conventional MCTF schemes. Furthermore, UMCTF can also be employed in alternative open-loop scalable coding frameworks using DCT for the texture coding.
Mobile services used in unstable environments: design requirements based on three case studies
Authors: Els van de Kar, Sam Muniafu, Yan Wang
Venue: Proceedings of the 8th international conference on Electronic commerce: The new e-commerce: innovations for conquering current barriers, obstacles and limitations to conducting successful business on the internet (2006)

The fast developing mobile technology and the lack of practices make it difficult to design mobile information services of satisfying quality within allocated time and budget. One of the difficulties is the unstable environment in which users accessing these services find themselves. Information services used on a personal computer connected to the Internet with a wired line are nowadays quite stable. However, the use of information services on a mobile device connected to the Internet by a mobile or wireless network is still vulnerable. The usage is even more unstable since the users are distracted when they are on the move, in an environment that might be unfamiliar, noisy, or surrounded with traffic.In this paper we describe three different case studies in which a mobile information service is designed for use in an unstable environment. We analyze the usage of these services and derive requirements for a design method to deal with this. We recommend applying context studies, simulation, user participation and service assembly with building blocks during the design process.
Modeling citation behavior in management science journals
Authors: John Mingers, Quentin L. Burrell
Venue: Information Processing and Management: an International Journal (2006)

Citation rates are becoming increasingly important in judging the research quality of journals, institutions and departments, and individual faculty. This paper looks at the pattern of citations across different management science journals and over time. A stochastic model is proposed which views the generating mechanism of citations as a gamma mixture of Poisson processes generating overall a negative binomial distribution. This is tested empirically with a large sample of papers published in 1990 from six management science journals and found to fit well. The model is extended to include obsolescence, i.e., that the citation rate for a paper varies over its cited lifetime. This leads to the additional citations distribution which shows that future citations are a linear function of past citations with a time-dependent and decreasing slope. This is also verified empirically in a way that allows different obsolescence functions to be fitted to the data. Conclusions concerning the predictability of future citations, and future research in this area are discussed.
James Webb Space Telescope Use of XML
Authors: Jonathan Gal-Edd, Curtis Fatig
Venue: Proceedings of the 2nd IEEE International Conference on Space Mission Challenges for Information Technology (2006)

James Webb Space Telescope (JWST) has been defining, developing, and exercising the use of a common eXtensible Markup Language (XML) since 2002 for the central Project Reference Database (PRD) that would not only include the basic command and telemetry database structures, but also table definitions, pages, scripts, and other items needed for the real-time operations, archive, and planning systems. As part of the National Aeronautics and Space Administration (NASA) and the wider international space community, JWST has been working with the Jet Propulsion Laboratory (JPL), Object Management Group (OMG) and the Consultative Committee for Space Data Systems (CCSDS) XML Telemetry and Command Exchange (XTCE) personnel to provide the information needed by space systems for exchanging databases using a XML standard structure. This paper will discuss how JWST uses XML, the experience in the XML structure, exchanging databases with other users, and issues that have been experienced by JWST.
Adaptive estimation of hidden nearly completely decomposable Markov chains
Authors: V. Krishnamurthy
Venue: Proceedings of the Acoustics, Speech, and Signal Processing,1994. on IEEE International Conference - Volume 04 (1994)

We propose maximum-likelihood (ML) estimation schemes for nearly completely decomposable Markov chains (NCDMC) in white Gaussian noise. Aggregation techniques based on stochastic complementation are applied to reduce the dimension of the resulting hidden Markov model (HMM) and hence substantially reduce the computational costs of the estimation algorithms. We then present an aggregation based expectation maximization (EM) algorithm for estimating the parameters and states of the HMM. 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
Wall-driven incompressible viscous flow in a two-dimensional semi-circular cavity
Authors: R. Glowinski, G. Guidoboni, T.-W. Pan
Venue: Journal of Computational Physics (2006)

The main goal of this article is to investigate the capability of an operator-splitting/finite elements based methodology at handling accurately incompressible viscous flow at large Reynolds number (Re in regions with corners and curved boundaries. To achieve this goal the authors have selected a wall-driven flow in a semi-circular cavity. On the basis of the numerical experiments reported in this article it seems that the method under investigation has no difficulty at capturing the formation of primary, secondary and tertiary vortices as Re increases; it has also the capability of identifying a Hopf bifurcation phenomenon taking place around Re = 6600.
Real World Interaction Oriented Edutainment using Ubiquitous Devices
Authors: Hiroyuki Mitsuhara, Hiroaki Ogata, Kazuhide Kanenishi, Yoneo Yano
Venue: Proceedings of the Fourth IEEE International Workshop on Wireless, Mobile and Ubiquitous Technology in Education (2006)

We developed a real world interaction oriented edutainment (system) where students can learn through interaction with persons and objects in the real world as though it were game. This edutainment has characteristics such as (1) quizzes recorded in RFID tags attached to the objects are presented on a students' PDA and (2) persons play a role that provides hints for the quizzes and leads the students to a learning goal according to an edutainment scenario. We practiced this edutainment at an educational event for elementary school students.