ppxscal/embedding_network huggingface dataset:
An identity-based security framework For VANETs
Authors: Pandurang Kamat, Arati Baliga, Wade Trappe
Venue: Proceedings of the 3rd international workshop on Vehicular ad hoc networks (2006)

We present a security framework for Vehicular Ad hoc Networks (VANETs), using identity-based cryptography, to provide authentication, confidentiality, non-repudiation and message integrity. Additionally it provides scalable security and privacy using short-lived, authenticated and unforgeable, pseudonyms. This feature can be used by VANET applications that require quantifiable trust and privacy to provide differentiated service based on various levels of trust and privacy thresholds.
Rule-based intelligence in the Semantic Web-or-"I'll settle for a web that's just not so dumb!"
Authors: Dean Allemang
Venue: Proceedings of the Second International Conference on Rules and Rule Markup Languages for the Semantic Web (2006)

One could fairly say that the role of rules in the semantic web has been controversial; in the few short years since the first publication of the Semantic Web stack, Rules have sometimes been given a central role, at other times a peripheral role, and sometimes left out completely. Why such variation for an technology with thirty years of background? The reason for these differences of opinion stem from different goals for the inclusion of rules in the Semantic Web stack. At one extreme are the Description Logicians who see no need for a general-purpose programming language in the semantic web stack. At the other extreme are those who want to build a web infrastructure with the capacity for emergent intelligence. Our experience with deploying semantic web solutions using OWL alongside rules suggests a moderate middle path; we don't need or even want our web infrastructure to exhibit intelligence; that's what our applications are for. We just need a consistent and coherent web of information to work from. Simply put, we just want our web infrastructure not to be so dumb. Armed with this understanding, we can see the role of rules in the Semantic Web in a different light, and see a clear role of rules in the semantic web stack.
A model of electrical contacts with advanced degradation
Authors: C. G. Aronis, C. S. Psomopoulos, C. G. Karagiannopoulos, P. D. Bourkas
Venue: International Journal of Modelling and Simulation (2006)

This paper describes a model of the operation of electric contacts. An equivalent circuit is proposed that is valid for the usual application of electrical contacts. The theoretical background of the model is relations derived from quantum mechanical tunnelling, and a new formula is proposed that describes the activity of arcs and discharges. The investigation is based upon commonly accepted principles of contacts operation. The experimental results and the theoretical results from the model are in close agreement. The proposed model appears to adequately describe the operation of electrical contacts, even badly degraded contacts.
Braking radiation in problem of identification & management of radioactive waste
Authors: N. P. Dikiy, A. N. Dovbnya, V. L. Uvarov
Venue: Proceedings of the 2003 International Conference on Physics and Control - Volume 3 (2003)

Growth of atomic energetics and nuclear technologies is accompanied by increase of radioactive waste including long-lived ones. The wastes inside the wrecked Chernobyl 4-th unit is of particular importance because their amount is estimated as much as 20MCi. Under the circumstances a problem of operative identification of the waste and their long-term disposal is urgent. The report presents an overview of the waste identification high-duty method elaborated in NSC KIPT and based on /spl gamma/-activation analysis with use bremsstrahlung of the high-current electron accelerator. On the other hand disposal of the radioactive waste faces a problem of confinement materials (including geological structures). Such materials have to keep their protection properties with respect to radionuclide transport under absorbed dose value up to /spl sim/10/sup 8/ Gy during thousand years or so. The elaborated methods for production of radionuclide-tracers and operative determination of their diffusion coefficients into barriers under different doses of the braking photons and corrosion conditions are described.
Audio-video automatic speech recognition: an example of improved performance through multimodal sensor input
Authors: Roland Goecke
Venue: Proceedings of the 2005 NICTA-HCSNet Multimodal User Interaction Workshop - Volume 57 (2006)

One of the advantages of multimodal HCI technology is the performance improvement that can be gained over conventional single-modality technology by employing complementary sensors in different modalities. Such information is particular useful in practical, real-world applications where the application's performance must be robust against all kinds of noise. An example is the domain of automatic speech recognition (ASR). Traditionally, ASR systems only use information from the audio modality. In the presence of acoustic noise, the performance drops quickly. However, it can and has been shown that incorporating additional visual speech information from the video modality improves the performance significantly, so that AV ASR systems can be employed in applications areas where audio-only ASR systems would fail, thus opening new application areas for ASR technology. In thispaper, a non-intrusive (no artificial markers), real-time 3D lip tracking system is presented as well as its application to AV ASR. The multivariate statistical analysis 'co-inertia analysis' is also shown, which offers improved numerical stability over other multivariate analyses even for small sample sizes.
Specificity of the Effect of a Nicotinic Receptor Polymorphism on Individual Differences in Visuospatial Attention
Authors: Pamela M. Greenwood, John A. Fossella, Raja Parasuraman
Venue: Journal of Cognitive Neuroscience (2005)

Cortical neurotransmitter availability is known to exert domain-specific effects on cognitive performance. Hence, normal variation in genes with a role in neurotransmission may also have specific effects on cognition. We tested this hypothesis by examining associations between polymorphisms in genes affecting cholinergic and noradrenergic neurotransmission and individual differences in visuospatial attention. Healthy individuals were administered a cued visual search task which varied the size of precues to the location of a target letter embedded in a 15-letter array. Cues encompassed 1, 3, 9, or 15 letters. Search speed increased linearly with precue size, indicative of a spatial attentional scaling mechanism. The strength of attentional scaling increased progressively with the number of C alleles (0, 1, or 2) of the alpha-4 nicotinic receptor gene C1545T polymorphism (n = 104). No association was found for the dopamine beta hydroxylase gene G444A polymorphism (n = 135). These findings point to the specificity of genetic neuromodulation. Whereas variation in a gene linked to cholinergic transmission systematically modulated the ability to scale the focus of visuospatial attention, variation in a gene governing dopamine availability did not. The results show that normal variation in a gene controlling a nicotinic receptor makes a selective contribution to individual differences in visuospatial attention.
Learning by tagging: group knowledge formation in a self-organizing learning community
Authors: Jude Yew, Faison Gibson, Stephanie Teasley
Venue: Proceedings of the 7th international conference on Learning sciences (2006)

This research explores the use of Social Tagging as a means by which group knowledge is formed within a learning community. A study of an undergraduate Business School class that utilizes Social Tagging is undertaken to analyze the patterns and evolution of use of tags in order to make a case for Social Tagging as a viable means to visualize and facilitate group knowledge formation.
Analyzing Behaviorial Data for Refining Cognitive Models of Operator
Authors: Olivier Georgeon, Alain Mille, Thierry Bellet
Venue: Proceedings of the 17th International Conference on Database and Expert Systems Applications (2006)

We present a methodology and a tool for analyzing the activity of an operator interacting with a complex technical device. The goal is of refining cognitive models of the operator by relating them to patterns of behavior in real situations. The activity is observed to be modeled as a trace having a graph structure The trace is transformed according to metadata in order to become meaningful in the context of modeling theories. Our "Trace Based System" thus gathers both a representation of the activity and a representation of the analyst's expertise, for facilitating the discovery of knowledge in the field of cognitive psychology. The approach is illustrated by its application for car driver cognitive modeling.
In the News
Authors: Greg Goth
Venue: IEEE Software (2006)

In the first news story, "Global Technology Transfer Infrastructure Is Maturing," the success of the US system of funded technology transfer hasn't been lost on the rest of the world's research community. From Stockholm to Shanghai, researchers, scholars, and policymakers are crafting legislation allowing for equitable distribution of intellectual-property rights arising from funded research. In addition, they're helping to build long-term national and multinational frameworks in which the public, nonprofit, and private sectors can each reap public investment's benefits. In the second story, "SourceForge Awards Highlight Open Source Trends," the first SourceForge.net Community Choice Awards, presented in April 2006, reflect software development trends such as the blurring between the developer and user communities.
ACTIVE: agile coordinator testbed integrated virtual environment
Authors: G. Emami, J. Cheng, D. Cornwell, M. Feldhousen, C. Long, V. Malhotra, I. Starnes, L. Kerschberg, A. Brodsky, X. Zhang
Venue: Proceedings of the fifth international joint conference on Autonomous agents and multiagent systems (2006)

This paper describes the specification, design and development of ACTIVE, a testbed for the testing and simulation of large-scale agent-based systems. ACTIVE is being developed as part of DARPA's Coordinators program. The goal of the ACTIVE testbed is to support the simulation of large collections of distributed cooperating agents in solving constrained scheduling problems.
Segregated failures model for availability evaluation of fault-tolerant systems
Authors: Sergiy A. Vilkomir, David L. Parnas, Veena B. Mendiratta, Eamonn Murphy
Venue: Proceedings of the 29th Australasian Computer Science Conference - Volume 48 (2006)

This paper presents a method of estimating the availability of fault-tolerant computer systems with several recovery procedures. A segregated failures model has been proposed recently for this purpose. This paper provides further analysis and extension of this model. The segregated failures model is compared with a Markov chain model and is extended for the situation when the coverage factor is unknown and failure escalation rates must be used instead. This situation is illustrated in detail by estimating availability of a Lucent Technologies Reliable Clustered Computing architecture. For this example, numeric values are provided for availability indexes and the contribution of each recovery procedure to total system availability is analysed.
On the binary projective codes with dimension 6
Authors: Iliya Bouyukliev
Venue: Discrete Applied Mathematics (2006)

All binary projective codes of dimension up to 6 are classified. Information about the number of the codes with different minimum distances and automorphism group orders is given.
Estimation of percentiles of cycle time in manufacturing simulation
Authors: Feng Yang, Bruce E. Ankenman, Barry L. Nelson
Venue: Proceedings of the 37th conference on Winter simulation (2005)

Cycle time-throughput (CT-TH) percentile curves quantify the relationship between percentiles of cycle time and factory throughput, and they can play an important role in strategic planning for manufacturing systems. In this paper, a highly flexible distribution, the generalized gamma, is used to represent the underlying distribution of cycle time. To obtain CT-TH percentile curves, we fit metamodels for the first three CT-TH moment curves throughout the throughput range of interest, determine the parameters of the generalized gamma by matching moments, and obtain percentiles by inverting the distribution. To insure efficiency and control estimation error, simulation experiments are built up sequentially using a multistage procedure. Numerical results are presented to demonstrate the effectiveness of the approach.
Sensing and Control for Geometry Stability of the Melt Pool and the Cross Sectional Area in Laser Cladding
Authors: Liangliang Nan, Weijun Liu
Venue: Proceedings of the First International Conference on Innovative Computing, Information and Control - Volume 1 (2006)

The accurate control of process parameters is particularly important for the growth of high quality structures during laser cladding. Melt pool size and cross sectional area are key process characteristics that can be controlled to allow the precise deposition of complex features. A feasible mathematical model is established to describe the interaction between laser and powder particles and to predict and control the cross sectional area. Also, a vision-based sensing system is proposed to detect the transient shape and size of the melt pool. The system focuses on the measuring of the geometric parameters of the melt pool by using a digital image processing method and thus giving researchers the parameters on-line, which gives us a necessary tool to gain insight into the cladding process and to optimize the material quality.
High assurance system software
Authors: Gerwin Klein, Ralf Huuck
Venue: Proceedings of the 10th Australian workshop on Safety critical systems and software - Volume 55 (2006)

This paper describes an approach to developing high assurance system software. We demonstrate how different formal methods can be applied in the development process by matching specific techniques and tools to the different levels of system requirements and how those techniques can complement each other.
Structure and dynamics of a predicted ferredoxin-like selenoprotein in Japanese encephalitis virus
Authors: Haizhen Zhong, Ethan Will Taylor
Venue: Journal of Molecular Graphics (2004)

Homologues of the selenoprotein glutathione peroxidase (GPx) have been previously identified in poxvuses and in RNA viruses including HIV-1 and hepatitis C virus (HCV). Sequence analysis of the NS4 region of Japanese encephalitis virus (JEV) suggests it may encode a structurally related but functionally distinct selenoprotein gene, more closely related to the iron-binding protein ferredoxin than to GPx, with three highly conserved UGA codons that align with essential Cys residues of ferredoxin. Comparison of the probe JEV sequence to an aligned family of ferredoxin sequences gave an overall 30.3% identity and 45.8% similarity, and was statistically significant at 4.9 S.D. (P < 10-6) above the average score computed for randomly shuffled sequences. A 3-dimensional model of the hypothetical JEV protein (JEV model) was constructed by homology modeling using SYBYL, based upon a high resolution X-ray structure of ferredoxin (PDB code: 1awd). The JEV model and the model from 1awd were subsequently subjected to molecular dynamics simulations in aqueous medium using AMBER 6. The solution structure of the JEV model indicates that it could fold into a tertiary structure globally similar to ferredoxin 1awd, with RMSD between the averaged structures of 1.8 Å for the aligned regions. The modeling and MD simulations data also indicate that this structure for the JEV protein is energetically favorable, and that it could be quite stable at room temperature. This protein might play a role in JEV infection and replication via TNF and other cellular stimuli mediated via redox mechanisms.
Visualizations in teaching chemistry
Authors: Juan Moran, P. David Pearson, Lisa A. Bievenue, Carole S. Chang, Steven D. Nelson, Spencer L. Pasero
Venue: Proceedings of the 1996 international conference on Learning sciences (1996)

Acquisition and mastery of chemistry concepts depend on an interpretative framework that is microscopic and requires a three-dimensional dynamic representation. The Visualizations in Chemistry project created a computational environment where students can do simulations of atomic and molecular bonding in order to develop a more intuitive understanding of quantum chemistry. Students used a high performance computing environment to perform calculations and interactively visualize the resulting images. In this paper, we report on one detailed implementation where 7 conceptual areas were evaluated. The results showed improvements in students' visualizations of atoms and molecules, but it was not clear if the students' initial models were replaced. Suggestions for future implementation include more attention to learning in the visual mode, more chemistry background preparation, and use of an improved interface.
Shallow NLP techniques for internet search
Authors: Alex Penev, Raymond Wong
Venue: Proceedings of the 29th Australasian Computer Science Conference - Volume 48 (2006)

Information Retrieval (IR) is a major component in many of our daily activities, with perhaps its most prominent role manifested in search engines. Today's most advanced engines use the keyword-based ("bag of words") paradigm, which concedes some inherent disadvantages. We believe that natural language (NL) is a more user-oriented, context-preservative and intuitive mechanism for web search.In this paper, we explore shallow NLP techniques to support a range of NL queries over an existing keyword-based engine. We present JASE, a web application enveloping the Google search engine, which performs web searches by decomposing input NL queries and generating new queries that are more suitable for the search engine. By using some of Google's syntactic operators and filters, it creates "clever" queries to improve precision.A preliminary evaluation was conducted to test JASE's accuracy, and results have been encouraging. We conclude that the NL model has potential to not only rival the keyword-based paradigm, but substantially surpass it.
Towards a Network-Based Civil Society: the Communications Camp Paradigm
Authors: Giuseppe Lugano, Marja-Liisa Vihera, Leena Viukari
Venue: Proceedings of the Sixth IEEE International Conference on Advanced Learning Technologies (2006)

In this paper we introduce the Communications Camp paradigm, a laboratory for social innovation. Based on constructive learning theories and on Viherä's studies on communication education, it has been run with success from 1987, with the aim of offering to camp participants the needed skills required by the Information Society and to researchers a useful insight of future scenarios of society development.
Interaction between stock indices via changepoint analysis: Research Articles
Authors: Martin J. Lenardon, Anna Amirdjanova
Venue: Applied Stochastic Models in Business and Industry (2006)

Stock market indices from several countries are modelled as discretely sampled diffusions whose parameters change at certain times. To estimate these times of parameter changes we employ both a sequential likelihood-ratio test and a non-parametric, spectral algorithm designed specifically for time series with multiple changepoints. Finally, we use point-process techniques to model relationships between changepoints of different financial time series. Copyright &copy; 2006 John Wiley & Sons, Ltd.
Invited Paper: How Can Mobile Agents and Cost Model Approaches Helpf for Distributed Query Optimization
Authors: Abdelkader Hameurlain, Franck Morvan
Venue: Proceedings of the 17th International Conference on Database and Expert Systems Applications (2006)

The management of voluminous, heterogeneous, and distributed data on a large-scale raises new problems and presents real challenges: efticiency of access, placement and redistribution of data, communication, confidentiality of access, availability of data, indexation, caching and replication mechanism, and benchmarking. In this paper, we point out the contributions of execution models based on mobile agents and cost model approaches to the large scale distributed query optimization. Firstly, we summarize state of the art of the main execution models based on mobile agents. We show how mobile agents can react dynamically to estimation errors, and resources unavailability. Then, to guarantee the autonomous of mobile agents, a part of cost model must be embedded. Finally, we study, the efticiency of mobile agents in relation with the cost model approaches, the query type, and the adequacy of the cost model with regard to the data sources. Identifcation of intervals for mobility eflciency, allows to define and validate a proactive migration policy.
A New Motion Estimation Scheme Using an Adaptive Block Matching Algorithm
Authors: Hyeonwoo Nam
Venue: Proceedings of the 2006 International Conference on Hybrid Information Technology - Volume 02 (2006)

In the block matching for the video compression, there is the spatial correlation of the video sequence between the motion vectors of current blocks. In this paper, we propose the enhanced fast block matching algorithm using the spatial correlation of the video sequence and the center-biased property of motion vectors. The proposed algorithm determines an exact motion vector using the predicted motion vector from the adjacent macro blocks of the current frame and the Cross- Hexagonal search pattern. The proposed Enhanced Cross-Hexagonal Search (ECHS) algorithm employs the halfway-stop technique and finds small motion vectors with fewer search points than the hexagon-based search (HEXBS) algorithm and the CDS algorithm while maintaining similar or even better search quality. The improvement of ECHS over HEXBS and CDS can be up to a 38~58% gain on speedup. Experimental results show that the ECHS provides faster searching speed and smaller distortions than other popular fast blockmatching algorithms.
Assessment of Dynamic Look-Ahead Inter-Processor Connection Reconfiguration for Different Control Paradigms
Authors: Eryk Laskowski, Marek Tudruj
Venue: Proceedings of the Proceedings of The Fifth International Symposium on Parallel and Distributed Computing (2006)

Program execution methods and respective architectural solutions for parallel embedded systems with look-ahead dynamic inter-processor connection setting are discussed in the paper. The look-ahead dynamic connection setting is a novel method, which leads to time transparency of reconfiguration control during program execution. The look-ahead dynamic reconfiguration assumes segmentation of programs into sections, which are executed in parallel with connection setting for subsequent sections. The discussed architectures for the look-ahead dynamic reconfiguration are based on redundant resources such as processor links and link connection switches. The paper compares the efficiency of Strassen matrix multiplication in the systems based on multiple link connection switches, partitioned processor link sets and anticipated link connection setting on request in a single crossbar switch.