ppxscal/embedding_network huggingface dataset:
Privacy-Preserving Data Publishing Based on De-clustering
Authors: Qiong Wei, Yansheng Lu, Qiang Lou
Venue: Proceedings of the Seventh IEEE/ACIS International Conference on Computer and Information Science (icis 2008) (2008)

In recent years, privacy preservation has become a serious concern in publication of personal data because of the wide availability of personal data. In the literature, we know that the degree of privacy protection is really determined by the number of distinct sensitive values in each group which is classified according to quasi-identifiers. In this paper, we present a novel method to protect data privacy by partitioning the microdata into some groups based on de-clustering. In this method, we make the records contained in each group possess distinct sensitive values and ensure that the size of the minimal groups not to be less than a threshold σ. According to a novel privacy measure proposed in this paper, our method can provide strong privacy protection. Extensive experiments confirm that our method can provide stronger privacy protection than the methods based on l-diversity.
TTTC Newsletter
Authors: Bruce C. Kim
Venue: IEEE Design Test (2008)

This newsletter provides information on past and upcoming events related to the IEEE Computer Society's Test Technology Technical Council and the test community.
Protein image alignment via tensor product cubic splines
Authors: F. A. Potra, X. Liu
Venue: Optimization Methods Software (2007)

The class of tensor product cubic splines is considered in an optimization process for two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) image alignment problems arising in proteomics studies. Numerical results are presented along with comparisons with previous results based on piecewise affine and bilinear transformations.
A semi-automated approach for extracting buildings from QuickBird imagery applied to informal settlement mapping
Authors: S. D. Mayunga, D. J. Coleman, Y. Zhang
Venue: International Journal of Remote Sensing (2007)

Recent advances in sensor technology have promoted the mapping communities to investigate the potential and information contents of recent very high-resolution satellite images. In this paper, we report our new semi-automatic building extraction approach and our first results of mapping informal settlement areas obtained using QuickBird high-resolution images. We implemented our mapping approach using snakes and a radial casting algorithm, and assessed the results both qualitatively and quantitatively and compared them with ground truth data from a similar area. Finally, we summarized the potential and limitations of the second-generation commercial high-resolution satellite images to extract buildings using existing software.
DynaFusion: a modeling system for interactive impossible objects
Authors: Shigeru Owada, Jun Fujiki
Venue: Proceedings of the 6th international symposium on Non-photorealistic animation and rendering (2008)

We describe DynaFusion, a modeling system for interactive impossible objects. Impossible objects are defined as multiple 3D polygonal meshes with edge visibility information and a set of constraints that define pointwise relationships between the meshes. A user can easily create such models with our modeling tool. The back-end of our system is a constraint solver that seamlessly combines multiple meshes in a projected 2D domain with 3D line orientations and that maintains coherence for each successive viewpoint, thereby allowing the user to rotate the impossible object without losing visual continuity of the edges. We believe that our system will stimulate the creation of innovative artworks.
Public-Private Partnership in e-Government: A Case Implementation
Authors: Alain Sandoz, Jean-René Eudes, Raphaëlle Prévot
Venue: Proceedings of the 2008 International MCETECH Conference on e-Technologies (2008)

Public-private partnerships (PPP) are used by governments as a means to finance infrastructure services such as roads, bridges or hospitals. In e-government, public services are provided and delivered to citizens and businesses through the internet. The end user should be able to measure a difference in terms of service quality and comfort, or necessary effort, delay, and cost, between acquiring the service over the net vs. using traditional channels. This paper presents a case implementation of PPP in e-government in Geneva, Switzerland. In this scheme, a private third party is introduced aside the public administration and the end-user in order to maximize the added value to the user. In comparison to the traditional client-server model of internet transaction, several new problems are encountered at the organizational, process and technical levels. The paper describes the solutions and underlying architectures.
Brief paper: Decentralized control design of interconnected chains of integrators: A case study
Authors: Guangyu Liu, Iven Mareels, Dragan Nešić
Venue: Automatica (Journal of IFAC) (2008)

We develop a constructive decentralized control design procedure for a class of systems that may be loosely described as chained integrators which are dynamically coupled. The design method is inspired by nested saturation control ideas and formulated by applying the singular perturbation theory. We demonstrate that the proposed design provides a Lyapunov function for an associated closed loop system from which semi-global stability may be deduced. Using the proposed idea, we design a semi-globally stabilizing control law for a four degree of freedom spherical inverted pendulum.
Iterative learning control with input parameterization of a fedbatch lactic acid fermentation process
Authors: Cherif Ben-Youssef, Julio Waissman, Gabriela Vázquez, Virgilio López-M
Venue: Proceedings of the 5th WSEAS International Conference on Applied Mathematics (2004)

This paper presents a special type of iterative learning control (ILC) strategy for the optimization of a fedbatch lactic acid fermentation process. The main advantage of using ILC is that it uses only off-line output measurements, circumventing the well-known drawback of insufficient on-line measurement capability in many in situ fermentation control applications. Due to the fact that fedbatch reactors are permanently in transient regime, the tracking performances of a conventional ILC algorithm deteriorated as the number of off-line samples decreases. Improved results are obtained by using an ILC approach based on the parameterization of the control profile with an adequate piece-wise continuous exponential function. A simulation study demonstrates the feasibility of the proposed ILC strategy.
How to cope with questions typed by dyslexic users
Authors: Laurianne Sitbon, Patrice Bellot
Venue: Proceedings of the second workshop on Analytics for noisy unstructured text data (2008)

In this paper we propose a way to cope with questions typed by dyslexic users as they are usually a deformation of the intended query that cannot be corrected with classical spellcheckers. We first propose a new model for statistic question answering systems based on a probabilistic information retrieval model and a combination of results. This model allows a multiple weighted terms query as an input. We also introduce a phonology based approach at the sentence level to derive possible intended terms from typed questions. This approach uses the finite state machine framework to go from phonetic hypothesis and spellchecker proposals to hypothesized sentences thanks to a language model. The final weighted queries are obtained thanks to posterior probabilities computation. They are evaluated according to new density and appearance rating measures which adapt recall and precision to non binary data.
Aligned quantum dot molecules with 4 satellite dots by self-assembly
Authors: N. Siripitakchai, C. C. Thet, S. Panyakeow, S. Kanjanachuchai
Venue: Microelectronic Engineering (2008)

The growth of InAs quantum dot molecules (QDMs) with 4 satellite dots is demonstrated in a single molecular beam epitaxial process. By forming InAs quantum dots via the conventional Stranski-Krastanow growth mode, followed by successive stages of GaAs capping, InAs regrowth, and in situ annealing under In flux, we are able to form uniform QDMs. We attribute the improved uniformity to the dual effects of enhanced material transport form the increased substrate temperature, and stabilization of In molar fraction from the external In flux.
Localized Sensor Area Coverage with Low Communication Overhead
Authors: Antoine Gallais, Jean Carle, David Simplot-Ryl, Ivan Stojmenović
Venue: IEEE Transactions on Mobile Computing (2008)

We propose several localized sensor area coverage protocols for heterogeneous sensors, each with arbitrary sensing and transmission radii. Sensors are assumed to be time synchronized, and active sensors are determined at the beginning of each round. The approach has a very small communication overhead since prior knowledge about neighbor existence is not required. Each node selects a random timeout and listens to messages sent by other nodes before the timeout expires. Sensor nodes whose sensing area is not fully covered (or fully covered but with a disconnected set of active sensors) when the deadline expires decide to remain active for the considered round, and transmit an activity message announcing it. There are four variants in our approach, depending on whether or not withdrawal and retreat messages are transmitted. Covered nodes decide to sleep, with or without transmitting withdrawal message to inform neighbors about the status. After hearing from more neighbors, active sensors may observe that they became covered, and may decide to alter their original decision and transmit a retreat message. Our simulation shows reduced message overhead while preserving coverage quality compared to existing method based on hello messages followed by retreat ones.
Bidirectional effect on a spectral image sensor for in-field crop reflectance assessment
Authors: Y. Kim, J. F. Reid
Venue: International Journal of Remote Sensing (2007)

Varying illumination geometry affects spectral measurements of a target reflectance and the intensity of solar radiation is the most important factor for in-field spectral measurements. This paper reports the effect of bidirectional electromagnetic radiation on an image-based reflectance sensor designed for plant nitrogen assessment. The results show the nonlinearity of reflectance as a function of the solar zenith angle. Ambient illumination was analysed and compensated for using fixed nadir-view positions of a solar radiometer and a 3-charge-coupled device (CCD) multispectral imaging sensor (MSIS). A compensation algorithm was developed to correct for the nonlinearity of both sensors. The compensated reflectance remained linearly consistent with varying the solar zenith angle throughout the daytime within a maximum standard deviation of 0.62% at all three (green, red and near-infrared) spectral channels, when testing with a 20% reflectance panel. The consistent reflectance was recovered under both sunny and cloudy conditions.
Development of a robot control method for curved seal extrusion for high productivity in an advanced Toyota production system
Authors: H. Sakai, K. Amasaka
Venue: International Journal of Computer Integrated Manufacturing (2007)

Recent Japanese enterprises have been promoting global production to realize uniform quality worldwide and production at optimal locations for survival amid severe competition. The authors considered the necessity of including the above method in the strategic application of the Toyota production system (TPS), and clarified Advanced TPS as the global production by manufacturing technology. In the future, reformation of the production workshops transformed by robotics and IT will be necessary in order to keep the same quality worldwide and production at optimum locations. Thus manufacturing technology had to be improved for mass production by developing the latest robot control methods. So far, the authors have established a robot control method for global production called RCM-EPC. RCM-EPC contains a three-core robot control method with (i) locus and speed control of the external point (-LSC), (ii) simulation for optimizing the operation position (-SOP) and (iii) constant speed control for robot movement (-CSC). Furthermore robots are applied to several applications in order to improve productivity and achieve a high-quality appearance. In particular, the authors here introduce an up-to-date glass-integrated curved seal extrusion (CSE), which is a new technology for use in manufacturing: the automobile-window mole as an example for Toyota - one of the most advanced automotive manufacturing enterprises in the world. With the demonstration of a 50% reduction in manufacturing costs using Advanced TPS, the authors have achieved high productivity and quality assurance in global production.
A high order compact MAC finite difference scheme for the Stokes equations: Augmented variable approach
Authors: Kazufumi Ito, Zhonghua Qiao
Venue: Journal of Computational Physics (2008)

This paper deals with the steady Stokes flow on a rectangular domain. A high order compact MAC finite difference scheme based on the staggered grid is developed for solving Stokes equations with a Dirichlet boundary condition on the velocity. A novel high order boundary treatment is developed via introducing a suitable augmented variable. The accuracy of the proposed method is demonstrated in test problems. Creeping flow solutions for driven cavity problem are obtained numerically and compared with published results.
Language design and implementation using ruby and the interpreter pattern
Authors: Ariel Ortiz
Venue: Proceedings of the 39th SIGCSE technical symposium on Computer science education (2008)

In this paper, the S-expression Interpreter Framework (SIF) is presented as a tool for teaching language design and implementation. The SIF is based on the interpreter design pattern and is written in the Ruby programming language. Its core is quite small, but it can be easily extended by adding primitive procedures and special forms. The SIF can be used to demonstrate advanced language concepts (variable scopes, continuations, etc.) as well as different programming styles (functional, imperative, and object oriented).
An Edge-based Image Copy Detection Scheme
Authors: Chia-Chen Lin, Shing-Shoung Wang
Venue: Fundamenta Informaticae (2008)

This paper presents a novel scheme to detect copied versions of digital images, particularly in an Internet environment based on edge information of images. The edge information is used to generate the signature set for a corresponding image. The edge-based signature sets are then used to compute the distortions between query images and test images, from among which a user wants to find copies. Experimental results confirm that the proposed scheme not only withstands various modifications of an original image but also offers good detection performance in dealing with various rotations, shifting of 17.5% of the width or height of an image, and cutting out up to 45% of the area of an image, which previous research work has found difficult to detect. Therefore, our proposed scheme could be very helpful in detecting copies of digital images transmitted in an Internet environment.
Analysis of the interaction between the dendritic conductance density and activated area in modulating α-motoneuron epsp: Statistical computer model
Authors: Gideon Gradwohl, Yoram Grossman
Venue: Neural Computation (2008)

Five reconstructed α-motoneurons (MNs) are simulated under physiological and morphological realistic parameters. We compare the resulting excitatory postsynaptic potential (EPSP) of models, containing voltage-dependent channels on the dendrites, with the EPSP of a passive MN and an active soma and axon model. In our simulations, we apply three different distribution functions of the voltage-dependent channels on the dendrites: a step function (ST) with uniform spatial dispersion; an exponential decay (ED) function, with proximal to the soma high-density location; and an exponential rise (ER) with distally located conductance density. In all cases, the synaptic inputs are located as a gaussian function on the dendrites. Our simulations lead to eight key observations. (1) The presence of the voltage-dependent channels conductance (gActive) in the dendrites is vital for obtaining EPSP peak boosting. (2) The mean EPSP peaks of the ST, ER, and ED distributions are similar when the ranges of G (total conductance) are equal. (3) EPSP peak increases monotonically when the magnitude of gNa_step (maximal gNa at a particular run) is increased. (4) EPSP kinetics parameters were differentially affected; time integral was decreased monotonically with increased gNa_step, but the rate of rise (the decay time was not analyzed) does not show clear relations. (5) The total G can be elevated by increasing the number of active dendrites; however, only a small active area of the dendritic tree is sufficient to get the maximal boosting. (6) The sometimes large variations in the parameters values for identical G depend on the gNa_step and active dendritic area. (7) High gNa_step in a few dendrites is more efficient in amplifying the EPSP peak than low gNa_step in many dendrites. (8) The EPSP peak is approximately linear with respect to the MNs' RN (input resistance).
Investigating success factors for hypermedia development tools
Authors: Davide Bolchini, Franca Garzotto, Paolo Paolini
Venue: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia (2008)

What are the key factors that contribute to the "success" of a hypermedia development tool? We have investigated this issue in the context of non ICT professional environments (e.g., schools or small museums), which have limited "in-house" technical competences and must cope with very limited budget. We discuss a set of success factors relevant to hypermedia tools targeted to this audience, and present a tool for multichannel hypermedia development that we have developed with these factors in mind. We report the key results from a wide on-the-field study in which the different success factors have been measured.
Wu's castle: teaching arrays and loops in a game
Authors: Michael Eagle, Tiffany Barnes
Venue: ACM SIGCSE Bulletin (2008)

We are developing games to teach introductory computer science concepts to increase student motivation and engagement in learning to program. Wu's Castle is a two-dimensional role playing game that teaches loops and arrays in an interactive, visual way. In this game, the player interactively programs magical creatures to create armies of snowmen. The game provides immediate feedback and helps students visualize the execution of their code in a safe environment. We tested the game in a CS1 course, where students could earn extra credit to play Wu's Castle. Our results show learning gains for game players, compared both through pre- and post-tests differences and improved performance on relevant final exam questions when compared to students who did not play the game. The results of this study suggest that Wu's Castle implements good practices for teaching programming within a game.
Tuning a Distributed Simulator Using an Evolutionary Algorithm
Authors: Donald O. Hamnes
Venue: Proceedings of the 41st Annual Simulation Symposium (anss-41 2008) (2008)

Use of an evolutionary algorithm to tune constant values that help control the performance of a distributed discrete event simulator is investigated. Simulator constants are parameters that are often set empirically; the simulator is then used with those constant values indefinitely or for some set of simulations. However, when the simulator is ported to a new environment, the constant values may have to be reset. Using an evolutionary algorithm to guide the setting of these constants can expedite the recalibration process. The empirical results demonstrate the usefulness of this approach.
A Neural-Network-Based Model Reference Speed Control for High Precision Motion Control Systems
Authors: Hongjie Hu, Dedi Li
Venue: Proceedings of the Tenth International Conference on Computer Modeling and Simulation (2008)

This paper developed a model reference control scheme by introducing a PI controller and RBF neural network (RBFNN) controller for speed control of high precision motion control systems. In the paper the RBF controller is able to online learn the unknown model dynamics, parameter variation and disturbance of the system. The model reference adaptive control (MRAC) scheme is used to give better solutions with online adaptation. By using a PI controller, the dynamic performance of the system is improved. This paper introduced a feedback parameter , which makes it easier to assign the poles of the system. Thus, it is feasible to preserve favorable model-following characteristics under various conditions. The effectiveness of the proposed control scheme is demonstrated by simulation. It is found that the proposed scheme can reduce the plant’s sensitivity to parameter variation and disturbance. High precision performance is obtained when given constant and sine wave disturbance at the same time.
Proposal for multicast transmissions in NC-HMIPv6 environment
Authors: Tanon Lambert Kadjo, Souleymane Oumtanaga, Tiemoman Kone, Pierre Tety
Venue: Proceedings of the 2nd WSEAS International Conference on Computer Engineering and Applications (2008)

The multicast in IP networks allows us to avoid the use of several point-to-point connections (unicast) very expensive in network resources. It strongly improves management of the group communications and the band-width. Many developed multicast services constitute undeniable prooves of its massive use in the current Internet. However if this technique of transmissions seems to be under controlled in fixed IP environments, it is not the same situation in an environment in which the transmitter or the receiver is supposed to move from a network to an other. At the moment, that situation constitutes one of the transmissions problematic around which many proposals have been made in general as far as Mobile IPv6 is concerned. In this article, we describe the problems linked to the IPv6 multicast mobility and the existing proposals for their resolution. Then we will propose an architecture aiming to satisfy and optimize these transmissions in the specific case of a mobile multicast receiver in NC-HMIPv6 environment.
On stability condition for bifluid flows with surface tension: Application to microfluidics
Authors: Cédric Galusinski, Paul Vigneaux
Venue: Journal of Computational Physics (2008)

Models for incompressible immiscible bifluid flows with surface tension are here considered. Since Brackbill et al. [J.U. Brackbill, D.B. Kothe, C. Zemach, A continuum method for modeling surface tension, J. Comput. Phys. 100 (1992) 335-354] introduced the Continuum Surface Force (CSF) method, many methods involved in interface tracking or capturing are based on this reference work. Particularly, the surface tension term is discretized explicitly and therefore, a stability condition is induced on the computational time step. This constraint on the time step allows the containment of the amplification of capillary waves along the interface and puts more emphasis on the terms linked with the density in the Navier-Stokes equation (i.e. unsteady and inertia terms) rather than on the viscous terms. Indeed, the viscosity does not appear, as a parameter, in this stability condition. We propose a new stability condition which takes into account all fluid characteristics (density and viscosity) and for which we present a theoretical estimation. We detail the analysis which is based on a perturbation study - with capillary wave - for which we use energy estimate on the induced perturbed velocity. We validate our analysis and algorithms with numerical simulations of microfluidic flows using a Level Set method, namely the exploration of different mixing dynamics inside microdroplets.