ppxscal/embedding_network huggingface dataset:
The Impact of Financial Crisis of 2007-2008 on Crude Oil Price
Authors: Xun Zhang, Lean Yu, Shouyang Wang
Venue: Proceedings of the 9th International Conference on Computational Science (2009)

For better estimation of the impact of extreme events on crude oil price volatility, an EMD-based event analysis approach is proposed. In this method, the time series to be analyzed is first decomposed into several intrinsic modes with different time scales from fine-to-coarse and an average trend. The decomposed modes respectively capture the fluctuations caused by the extreme event or other factors during the analyzed period. The total impact of an extreme event is included in only one or several dominant modes, but other modes provide valuable information for subsequent factors. The effects of financial crisis of 2007-2008 to crude oil price are analyzed through this method and empirical results reveal that the EMD-based event analysis method provides a feasible solution to estimating the impact of extreme events on crude oil prices.
Effects of a supplementary quadrature in the collocation method for solving the Hartree Fock equations in Ab-initio calculations
Authors: Sever Spanulescu, Mircea Moldovan
Venue: WSEAS Transactions on Mathematics (2009)

The collocation method for solving the Hartree-Fock equations of the self-consistent field in large atomic and molecular systems is analyzed and a method for improving its performances by supplementary analytical and numerical quadrature is proposed. We used monomial and Chbyshev type trial functions and the collocation points were equidistant or Chebyshev polynomial roots. The singularities have been avoided by a function change and analytical expressions have been obtained for the most part of the integrated terms in the matrix elements, except the Hartree-Fock potential which is treated separately in a similar way. This apriori analytical treatment ensures a greater speed and a lower condition number of the matrix necessary for the expansion's coefficient calculus, with an important effect on the overall precision and speed. Some numerical results are presented and compared with well-known types of orbitals, demonstrating the performance increasing in terms of precision and computing effort.
On spectral numerical characterizations of DNA sequences based on Hamori curve representation
Authors: Igor Pesek, Janez Žerovnik
Venue: Proceedings of the 10th WSEAS international conference on Mathematics and computers in biology and chemistry (2009)

We present new numerical characterization of DNA sequences that is based on the modified graphical representation proposed by Hamori. While Hamori embeds the sequence into Euclidean space, we use analogous embedding into the strong product of graphs, K4 ??? Pn, with weighted edges. Based on this representation, a novel numerical characterization was proposed in [Pesek and Žerovnik, MATCH Commun. Math. Comput. Chem. (Krag.), vol 60, 2008, 301-312] which is based on the products of ten eigenvalues from the start and the end of the descending ordered list of the eigenvalues of the L/L matrices associated with DNA. In this paper we compare two further numerical characterizations of the same type emphasizing the robustness of the approach.
Event-driven service coordination for business process integration in ubiquitous enterprises
Authors: Jaehyun Kong, Jae-Yoon Jung, Jinwoo Park
Venue: Computers and Industrial Engineering (2009)

The Internet has improved service-oriented enterprises to allow for real-time enterprises, collaborative process management, and supply chain integration. However, ubiquitous enterprise environments are becoming more and more complicated since a variety of communication devices are emerged and interconnected to the existing enterprise systems. Service-oriented architecture based on web services technology provides a promising platform from which enterprises can coordinate seamlessly with e-Services in heterogeneous information systems. Nevertheless, adopting the architecture for ubiquitous enterprise environments poses some challenges since the wireless/wired systems around the enterprise may dynamically interact in the network and cause a considerable amount of meaningful state changes (called ''events''). In this paper, a methodology that uses event-driven service technology and active rule processing is introduced for business process integration of ubiquitous enterprises. The event-driven approach to business process integration can supplement the service-oriented enterprise architecture by facilitating real-time event processing and distributed service coordination. We illustrate the proposed architecture by applying it to an international post-sales service company that sells electronic products.
My Fine Art: A Canvas of Written Expressions, 0th edition
Authors: John Moise
Venue:  (2007)

My Fine Art, a collection of poetry written by John Moise, displays his ideas about life, love, women, and his passion and understanding of acceptance. He gathered a portion of his poems from his early years, some present, and created the first installment to this volume. 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
Optimal control under reduced regularity
Authors: Thomas Apel, Gunter Winkler
Venue: Applied Numerical Mathematics (2009)

This paper deals with a linear quadratic optimal control problem with elliptic PDE constraints in three-dimensional domains with singularities. It is proved that the optimal control can be calculated by the finite element method at a rate of O(h^2) provided that the mesh is sufficiently graded. The approximation of this control is computed from a piecewise constant approximation followed by a postprocessing step. Although the results are similar to the two-dimensional case, the proofs changed significantly.
Sparsity Regularization for Radon Measures
Authors: Otmar Scherzer, Birgit Walch
Venue: Proceedings of the Second International Conference on Scale Space and Variational Methods in Computer Vision (2009)

In this paper we establish a regularization method for Radon measures. Motivated from sparse L 1 regularization we introduce a new regularization functional for the Radon norm, whose properties are then analyzed. We, furthermore, show well-posedness of Radon measure based sparsity regularization. Finally we present numerical examples along with the underlying algorithmic and implementation details. We shall, here, see that the number of iterations turn out of utmost importance when it comes to obtain reliable reconstructions of sparse data with varying intensities.
Analyzing critical process models through behavior model synthesis
Authors: Christophe Damas, Bernard Lambeau, Francois Roucoux, Axel van Lamsweerde
Venue: Proceedings of the 2009 IEEE 31st International Conference on Software Engineering (2009)

Process models capture tasks performed by agents together with their control flow. Building and analyzing such models is important but difficult in certain areas such as safety-critical healthcare processes. Tool-supported techniques are needed to find and correct flaws in such processes. On another hand, event-based formalisms such as Labeled Transition Systems (LTS) prove effective for analyzing agent behaviors.
Discrete-event controller design using Petri nets and fuzzy logic - preliminary study
Authors: Lucien Ngalamou, Leary Myers
Venue: WSEAS Transactions on Systems and Control (2009)

This paper presents a design approach intended for the modeling and synthesis of discrete-event modules of hybrid controllers by combining a model of computation and a soft computing synthesis approach. The model of computation is based on coloured Petri nets (CPNs) and the soft computing method uses fuzzy logic. Our approach converts Petri net models into their equivalent fuzzy sets for rapid prototyping on embedded controllers or programmable Logic devices. The Petri net model of a discrete-event controller is captured and modeled using DesignCPN software and now its latest version CPNTool. Design/CPN (CPNTool) uses coloured Petri nets (CPNs) in model representation. Fuzzy sets generated in our conversion process are compatible with the Xfuzzy software, which is a fuzzy logic software for the design of controllers. Xfuzzy can generate equivalent C and VHDL codes from fuzzy sets.
From Intracardiac Electrograms to Electrocardiograms: Models and Metamodels
Authors: Géraldine Ebrard, Miguel A. Fernández, Jean-Frédéric Gerbeau, Fabrice Rossi, Nejib Zemzemi
Venue: Proceedings of the 5th International Conference on Functional Imaging and Modeling of the Heart (2009)

We consider the problem of building a standard electrocardiogram (ECG) from the electrical potential provided by a pacemaker in a few points of the heart (electrogram). We use a 3D mathematical model of the heart and the torso electrical activity, able to generate "computational ECG", and a "metamodel" based on a kernel ridge regression. The input of the metamodel is the electrogram, its output is the ECG. The 3D model is used to train and test the metamodel. We illustrate the performance of the proposed strategy on simulated bundle branch blocks of various severities and a few clinical data.
An Automated Video-Based System for Iris Recognition
Authors: Yooyoung Lee, P. Jonathon Phillips, Ross J. Micheals
Venue: Proceedings of the Third International Conference on Advances in Biometrics (2009)

We have successfully implemented a Video-based Automated System for Iris Recognition (VASIR), evaluating its successful performance on the MBGC dataset. The proposed method facilitates the ultimate goal of automatically detecting an eye area, extracting eye images, and selecting the best quality iris image from video frames. The selection method's performance is evaluated by comparing it to the selection performed by humans. Masek's algorithm was adapted to segment and normalize the iris region. Encoding the iris pattern and then completing the matching followed this stage. The iris templates from video images were compared to pre-existing still iris images for the purpose of the verification. This experiment has shown that even under varying illumination conditions, low quality, and off-angle video imagery, that iris recognition is feasible. Furthermore, our study showed that in practice an automated best image selection is nearly equivalent to human selection.
Virtual institutions prototype
Authors: Anton Bogdanovych, Simeon Simoff, Marc Esteva
Venue: Proceedings of The 8th International Conference on Autonomous Agents and Multiagent Systems - Volume 2 (2009)

Virtual Institutions are Virtual Worlds with normative regulation of participants' interactions. This paradigm is based on normative multiagent systems and is technologically supported by Electronic Institutions. In this paper we outline the prototype that illustrates the application of Electronic Institutions to the domain of Virtual Worlds. We show how both human and agent controlled avatars can participate in Virtual Institutions and how the Electronic Institutions technology is used to govern their interactions.
Wind display device for locomotion interface in a virtual environment
Authors: Sandip Kulkarni, Charles Fisher, Eric Pardyjak, Mark Minor, John Hollerbach
Venue: Proceedings of the World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2009)

This paper describes development of a wind display system for the TreadPort virtual environment locomotion interface, which is cumulatively known as the TreadPort Active Wind Tunnel (TPAWT). Computational Fluid Dynamic simulations and experiments with a scaled model test-bed of the system has resulted in a combination of passive and active controls capable of controlling wind speed and angle acting on a user in the environment. Development of the full scale TPAWT system is then described, which requires consideration of system geometry, integration, packaging, wind loads, and instrumentation.
Simulation of Resource Acquisition by e-Sourcing Clusters Using NetLogo Environment
Authors: Konrad Fuks, Arkadiusz Kawa
Venue: Proceedings of the Third KES International Symposium on Agent and Multi-Agent Systems: Technologies and Applications (2009)

In the last few years many business clusters have been formed. Thanks to the geographical proximity as well as close cooperation companies are able to gain a lot of benefits that they would not reach if they worked on their own. The ICT has given a possibility to go beyond traditional cooperation and has allowed various geographically spread companies to create alliances. Especially the agent technology seems very promising. The software agents are able to efficiently support e-marketplaces, including partners who offer one another the best cooperation conditions at a given time[1][2]. The main contribution of this paper is a verification of the improved e-sourcing strategy which was presented in [3]. Simulations of this model have been carried out in the NetLogo environment. It has been shown that the usage of e-sourcing cluster can inconceivably boost up the process of resource acquisition.
Icelandic data driven part of speech tagging
Authors: Mark Dredze, Joel Wallenberg
Venue: Proceedings of the 46th Annual Meeting of the Association for Computational Linguistics on Human Language Technologies: Short Papers (2008)

Data driven POS tagging has achieved good performance for English, but can still lag behind linguistic rule based taggers for morphologically complex languages, such as Icelandic. We extend a statistical tagger to handle fine grained tagsets and improve over the best Icelandic POS tagger. Additionally, we develop a case tagger for non-local case and gender decisions. An error analysis of our system suggests future directions.
Information retrieval and the user's profile: critical aspects
Authors: Maria Rodica Volovici, Daniel Volovici
Venue: Proceedings of the 8th WSEAS international conference on Artificial intelligence, knowledge engineering and data bases (2009)

The paper presents the quality services improvement for every type of user in the university library and their utility. The users' profile contains information about the users, which is connected with its informational necessities. The profiles were used as models for possible types of questions (queries) since the appearance of the systems for the redeeming of information. Many efforts have been done recently for the integration of the profiles used and questions in more satisfying systems. Many systems of current awareness are based on the easy profiles. This type of profile is easier to compare with the new documents than any other complex profile; in the same time it clears away the developing of a sophisticated profile.
The Role of Boundary Crossing for Knowledge Advancement in Product Development
Authors: Kathrine A. Nygård, Anders I. Mørch
Venue: Proceeding of the 2007 conference on Supporting Learning Flow through Integrative Technologies (2007)

We present an empirical analysis of workplace learning using concepts from Activity Theory. The overall aim is to understand the evolution of a shared artifact in the boundary zone between a commercial organization (company) and its customers, on one hand, and between the company and a group of researchers on the other. The shared artifact is a project planning tool suite developed for customers by the company. We have identified three boundary-crossing activities: product development, user participation, and researchers' intervention and discuss their contributions to knowledge advancement on the basis of two identified contradictions. The interaction between developers and customers identifies a contradiction in adaptive product development, and the interaction between developers and researchers identifies a contradiction in use of a CRM system. We use data excerpts from a video-recorded interview and a design workshop to analyze our findings.
Enterprise system implementation in integrated context
Authors: P. M. Wognum
Venue: Proceeding of the 2006 conference on Leading the Web in Concurrent Engineering: Next Generation Concurrent Engineering (2006)

Integration within and between companies is facilitated and supported by means of enterprise systems like Enterprise Resource Planning (ERP) and Product Data Management/Product Lifecycle Management (PDM/PLM) systems. Despite the many successes that have been reported in the literature, in many companies the promise of enterprise systems is often not or only partly achieved. Implementation of such systems appears to be extremely difficult and complex. An enterprise system implementation project is multifaceted and different for each context. Business processes often need to be aligned with the best practices embedded in the enterprise system, while taking into account many other factors. In this paper, a model is offered to support start-up and execution of enterprise system implementation projects. It supports taking into account context-specific factors that make one project different from another. The model is based on results from the IST project BEST (Better Enterprise SysTem implementation). Based on the model a prototype tool has been developed to support improvement of enterprise system implementation projects by identifying weak areas and facilitating learning from previous experience.
The teaching of immunology using educational: gaming paradigms
Authors: Patrick Clements, Jeremy Pesner, Jeremiah Shepherd
Venue: Proceedings of the 47th Annual Southeast Regional Conference (2009)

Educational gaming is an exciting genre of computer programming that attempts to find interesting and compelling ways to teach while also being fun. Research has been conducted to determine what aspects make certain educational games effective, but there have been no conclusive findings. Combining information about successful educational gaming elements from these studies with our own knowledge, we created an educational game that simulates the processes of human immune systems by using a "Tower defense"-type game.
Seasonal trend analysis of image time series
Authors: J. Ronald Eastman, Florencia Sangermano, Bardan Ghimire, Honglei Zhu, Hao Chen, Neeti Neeti, Yongming Cai, Elia A. Machado, Stefano C. Crema
Venue: International Journal of Remote Sensing (2009)

A procedure is introduced for the analysis of seasonal trends in time series of Earth observation imagery. Called Seasonal Trend Analysis (STA), the procedure is based on an initial stage of harmonic analysis of each year in the series to extract the annual and semi-annual harmonics. Trends in the parameters of these harmonics over years are then analysed using a robust median-slope procedure. Finally, images of these trends are used to create colour composites highlighting the amplitudes and phases of seasonality trends. The technique specifically rejects high-frequency sub-annual noise and is robust to short-term interannual variability up to a period of 29% of the length of the series. It is, thus, a very effective procedure for focusing on the general nature of longer-term trends in seasonality.
Bug-based T2: A New Globally Convergent Approach to Reactive Navigation
Authors: Javier Antich, Alberto Ortiz
Venue: Proceeding of the 2005 conference on Artificial Intelligence Research and Development (2005)

Reactive mobile robot navigation based on potential field methods has shown to be a good solution for dealing with unknown and dynamic environments, where timely responses are required. Unfortunately, the complexity of the tasks which can successfully be carried out is restricted by the inherent shortcomings of the approach such as trapping situations due to local minima, difficulties passing among closely spaced obstacles, oscillations in narrow corridors, etc... This paper proposes a novel strategy which overcomes totally the first limitation by computing an adaptive navigation function on the basis of such artificial potential fields. As a result, navigation is achieved in very difficult scenarios such as maze-like environments. Moreover, the achievement of the goal is guaranteed whenever possible. A comparative study on the path length performance of our proposal with regard to other algorithms from the related literature is also presented.
Effect of interface state trap density on the characteristics of n-type, enhancement-mode, implant-free In0.3Ga0.7As MOSFETs
Authors: J. Ayubi-Moak, B. Benbakhti, K. Kalna, G. W. Paterson, R. Hill, M. Passlack, I. Thayne, A. Asenov
Venue: Microelectronic Engineering (2009)

The effect of interface state trap density, D"i"t, on the device characteristics of n-type, enhancement-mode, implant-free (IF) In"0"."3Ga"0"."7As MOSFETs [1,2] has been investigated using a commercial drift-diffusion (DD) device simulation tool. Methodology has been developed to include arbitrary D"i"t distributions in the input simulation decks to more accurately fit the measured subthreshold characteristics of recently reported 1.0@mm gate length IF In"0"."3Ga"0"."7As MOSFETs [3]. The impact of interface states on a scaled 30nm gate length IF MOSFET is also reported.
Analysis of flow on a moving flat plate in slip regime by Pseudo-Spectral method
Authors: H. Izan, H. Homayoni
Venue: Proceedings of the 2nd conference on European computing conference (2008)

The purpose of this work is to present an efficient low computational cost Pseudo-Spectral (P.S) approach based on the Chebyshev collocation method for solving the Blasius boundary layer equation in slip regime over a moving semi-infinite flat plate. This choice is supported by the excellent reputation of P.S amongst practitioners because of its high accuracy and low computational cost [1,2]. The Maxwell's original first-order model without temperature jump, which is limited to Kn ≤ 0.1 has been used for modeling wall slip velocity. A moving flat plate have been considered in the current work and the effects of wall velocity and slip flow at the wall on the velocity and shear stress profiles have been discussed. In spite of low computational cost in the present study, the results accurately have a good agreement with previous works.
Building effective mutual exclusion services for grids
Authors: Julien Sopena, Luciana Arantes, Fabrice Legond-Aubry, Pierre Sens
Venue: The Journal of Supercomputing (2009)

Taking into account the intrinsic heterogeneity of communication latency of grid environments, we propose in this article a composition approach that enables to build mutual exclusion services for grids. By using our approach, different intra and inter cluster token-based mutual exclusion algorithms can be combined easily. Performance evaluation tests were conducted on the French national grid testbed called Grid'5000, whose results show that our approach is effective and that the choice of the most suitable inter cluster algorithm depends on the behavior of the application.
Sound index: charts for the people, by the people
Authors: Varun Bhagwan, Tyrone Grandison, Daniel Gruhl
Venue: Communications of the ACM (2009)

Mining the wisdom of the online crowds generates music business intelligence, identifying what's hot and what's not.