ppxscal/embedding_network huggingface dataset:
Black boxes: making ends meet in data driven networking
Authors: Sasu Tarkoma, Dirk Trossen, Mikko Särelä
Venue: Proceedings of the 3rd international workshop on Mobility in the evolving internet architecture (2008)

In this paper, we consider issues pertaining to end-to-end communications and mobility of network end-points in a network where the forwarding is based on data and interest. We view the network as a collection of black boxes, based on a set of recursive rendezvous functions. The boxes hide their internal topology and expose only labels and interest definitions to outside. We study the concept of completeness of network topology and find it useful for understanding and optimizing publish/subscribe based network architectures. We also show that many issues related to making network end points meet on multiple layers, such as mobility, become much simplified and some even trivial. Towards the end of the paper, we outline challenges and future work in this area.
A New Method of Realizing Fingerprint Authentication on Smartcard
Authors: Shichao Chen, Bin Yu
Venue: Proceedings of the 2008 Congress on Image and Signal Processing, Vol. 5 - Volume 05 (2008)

A new method of realizing fingerprint authentication on Smartcard has been presented. Based on SOC, this method puts the pre-processing algorithm, which is the most time-wasting process, out of card. It not only decreases the complexity of realizing fingerprint authentication on Smartcard, but also ensures the security of fingerprint information due to the original fingerprint image has been transformed with cryptography algorithm of this paper. The experimental results demonstrate that this method can shorten the time of fingerprint verification effectively.
Production of two-material micro-assemblies by two-component powder injection molding and sinter-joining
Authors: Andreas Ruh, Adam-Mwanga Dieckmann, Richard Heldele, Volker Piotter, Robert Ruprecht, Christian Munzinger, J&#x00fc;rgen Fleischer, J&#x00fc;rgen Hau&#x00df;elt
Venue: Microsystem Technologies (2008)

In the field of micro-technology the production of metallic and ceramic micro-components by powder injection molding (PIM) has become a more and more established fabrication method. But in order to fulfill the demand for more complex-shaped high-precision micro-components further development work has to be performed. This is especially true if more efficient production routes for multi-component-micro-assemblies consisting of different materials or sub-components are envisaged. To meet these challenges, investigations are performed to realize and to establish two primary shape micro-processes. These are two-component micro-injection molding (2C-MicroPIM) and sinter-joining. The realization of these technologies will lead to a markedly reduction of the efforts for handling, adjustment, and assembling of metallic and ceramic micro-assemblies. Furthermore, an increased integration level and functionality can be yielded. For an effective transfer of scientific results to industrial applications the whole process chain must be considered, from development and construction of the tooling as well as of the components to the quality assurance and determination of the properties of the assemblies after sintering. These primary shape processes shall enable the mutual processing of different materials within the fabrication process, so avoiding separate mounting or assembling steps. Additionally fixed and loose junctions between at least two components shall be realized. The progress in research and development will be demonstrated especially by the implementation of shaft-to-collar connections between micro-gearwheels and corresponding shafts. Regarding two-component micro-injection molding, the tool construction for shaft-to-collar connections will be presented as well as first experimental results on the properties of selected ceramic powders and feedstocks for the special requirements of the 2C-MicroPIM process. With the assembly step being performed outside the injection molding tool before sinter-joining different parts and geometries can be combined quite easily. The presented article gives an overview on the concept and on preliminary testing results for the fabrication of a shaft-to-collar-connection. Additionally, a solution for an automated assembly of a shaft and a toothed wheel outside the injection molding tool is presented.
Dancing the night away: controlling a virtual karaoke dancer by multimodal expressive cues
Authors: Matthias Rehm, Thurid Vogt, Michael Wissner, Nikolaus Bee
Venue: Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems - Volume 3 (2008)

In this article, we propose an approach of nonverbal interaction with virtual agents to control agents' behavioral expressivity by extracting and combining acoustic and gestural features. The goal for this approach is twofold, (i) expressing individual features like situated arousal and personal style and (ii) transmitting this information in an immersive 3D environment by suitable means.
Exploiting Information Theory for Filtering the Kadir Scale-Saliency Detector
Authors: Pablo Suau, Francisco Escolano
Venue: Proceedings of the 3rd Iberian conference on Pattern Recognition and Image Analysis, Part II (2007)

In this paper we propose a Bayesian filter for the Kadir Scale Saliency Detector. Such filter is addressed to deal with the main bottleneck of the Kadir detector, which is the scale space search for all pixels in the image. Given some statistical knowledge about images considered, we show that it is possible to discard some points before applying the Kadir detector by using Information Theory and Bayesian Analysis, increasing efficiency with low error. Our method is based on the intuitive idea that homogeneous (not salient) image regions at high scales probably will be also homogeneous at lower scales of scale space.
Ultrametrics, Banach's fixed point theorem and the Riordan group
Authors: Ana Luzón, Manuel A. Morón
Venue: Discrete Applied Mathematics (2008)

We interpret the reciprocation process in K[[x]] as a fixed point problem related to contractive functions for certain adequate ultrametric spaces. This allows us to give a dynamical interpretation of certain arithmetical triangles introduced herein. Later we recognize, as a special case of our construction, the so-called Riordan group which is a device used in combinatorics. In this manner we give a new and alternative way to construct the proper Riordan arrays. Our point of view allows us to give a natural metric on the Riordan group turning this group into a topological group. This construction allows us to recognize a countable descending chain of normal subgroups.
Inter-operating grids through Delegated MatchMaking
Authors: Alexandru Iosup, Todd Tannenbaum, Matthew Farrellee, Dick Epema, Miron Livny
Venue: Scientific Programming (2008)

The grid vision of a single computing utility has yet to materialize: while many grids with thousands of processors each exist, most work in isolation. An important obstacle for the effective and efficient inter-operation of grids is the problem of resource selection. In this paper we propose a solution to this problem that combines the hierarchical and decentralized approaches for interconnecting grids. In our solution, a hierarchy of grid sites is augmented with peer-to-peer connections between sites under the same administrative control. To operate this architecture, we employ the key concept of delegated matchmaking, which temporarily binds resources from remote sites to the local environment. With trace-based simulations we evaluate our solution under various infrastructural and load conditions, and we show that it outperforms other approaches to inter-operating grids. Specifically, we show that delegated matchmaking achieves up to 60% more goodput and completes 26% more jobs than its best alternative.
Analysis for Video Coding: Moving It from the Encoder to the Decoder
Authors: Fernando Pereira
Venue: Proceedings of the 5th international conference on Image Analysis and Recognition (2008)

Video coding has a major importance in modern multimedia communications, applications and products as it is a core technology for their technical and economical deployment with success. This paper presents and compares the conventional, encoder prediction based video coding paradigm versus the novel, decoder estimation based video coding paradigm, especially from a video analysis for coding perspective. Besides the basic concepts and tools, the novel benefits, problems and challenges will be compared and discussed in the context of the most popular Wyner-Ziv video coding architecture.
Calculating the sample size of multivariate populations: norms of representation
Authors: Constantinos N. Tsiantis
Venue: Proceedings of the American Conference on Applied Mathematics (2008)

This article is touching the problem of representation of a mathematical space and treats the problem of sampling as a problem of representation. It makes the distinction between population representation and statistical representation, and considers statistical representation as the product of population representation and statistical (behavioral) factor. It produces the formula of representation of a population N (consisted of m number of classes with given number of subjects per class), giving the sample size nath. It produces the formula of statistical representation nbath as product of nath and of statistical factor. Application of the first formula justifies the number of representatives at the Vouli of ancient Athens while application of the second formula gives results similar to those in statistical bibliography.
Complex service design: A virtual enterprise architecture for logistics service
Authors: Charles Møller, Sohail S. Chaudhry, Bent Jørgensen
Venue: Information Systems Frontiers (2008)

This paper presents an interdisciplinary systems approach to service modeling, design and deployment. The study is based on a longitudinal case study of the development process of a complex logistic service system based on an advanced logistics model. The case examines the development of a Virtual Enterprise Architecture (VEA) for an automatic high-speed transport and sorting system applied in airports for baggage handling. The study traces the evolution of the system from the early conceptual phases to a successful commercial service deployed at Changi, Singapore Airport. The study is conducted using a retrospective analysis of the case using a design science research approach. The paper evaluates and discusses the issues of creating and designing a new complex logistics service, distinct from the physical product, based on an advanced discrete event-based simulation model. The paper concludes by presenting a generalized and validated conceptual framework for a VEA based on an advanced simulation model. The paper thus contributes to the field of service systems and service management by identifying a novel approach to effective design of a new service.
User Information Satisfaction with a Knowledge-Based Virtual Community: An Empirical Investigation
Authors: Xiao-Ling Jin, Christy M. Cheung, Matthew K. Lee, Huaping Chen
Venue: Proceedings of the 1st world summit on The Knowledge Society: Emerging Technologies and Information Systems for the Knowledge Society (2008)

Virtual communities provide online social spaces for individuals to share and exchange knowledge. The value of these communities however depends on user ongoing participation. User satisfaction is one of the most crucial factors determining the continuance of using an information system. In this specific context of virtual community, the content (information) is collectively created by members in the community. It is thus important to identify factors determining user information satisfaction. A theoretical model of user information satisfaction was developed and empirically tested with 240 current users of a knowledge-based virtual community. Among the four attributes of information quality, only perceived information relevance, disconfirmation of information accuracy, disconfirmation of comprehensiveness, and disconfirmation of information relevance have significant influence on user information satisfaction. This study has raised many interesting questions. Additional theorizing and empirical investigation for a better understanding of user information satisfaction in knowledge-based virtual communities are encouraged.
3D Brain Segmentation Using Active Appearance Models and Local Regressors
Authors: Kolawole O. Babalola, Tim F. Cootes, Carole J. Twining, Vlad Petrovic, Chris Taylor
Venue: Proceedings of the 11th international conference on Medical Image Computing and Computer-Assisted Intervention - Part I (2008)

We describe an efficient and accurate method for segmenting sets of subcortical structures in 3D MR images of the brain. We first find the approximate position of all the structures using a global Active Appearance Model (AAM). We then refine the shape and position of each structure using a set of individual AAMs trained for each. Finally we produce a detailed segmentation by computing the probability that each voxel belongs to the structure, using regression functions trained for each individual voxel. The models are trained using a large set of labelled images, using a novel variant of `groupwise' registration to obtain the necessary image correspondences. We evaluate the method on a large dataset, and demonstrate that it achieves results comparable with some of the best published.
Geometrically and physically based modeling for deformable objects simulating soft tissue interactions in surgery environments
Authors: Jorg Peters
Venue:  (2007)

This dissertation contributes a method for modeling deformable objects that leverages computer graphics techniques and state-of-the-art hardware to simulate and visualize deformations, including topological transformations like cutting, in real time. The resulting models are suitable for interactive surgical simulation for illustration and teaching purposes. The approach has been tested, in particular, by modeling responsive fatty tissue. To support force feedback as well as visual feedback, the deformable object consists of three closely coupled representations for dynamic response, collision detection, and visualization. All three representations are implemented on the Graphics Processing Unit, rather than on the CPU, to leverage parallelism for speed. (Full text of this dissertation may be available via the University of Florida Libraries web site. Please check http://www.uflib.ufl.edu/etd.html)
An over-sampling method for analogy-based software effort estimation
Authors: Yasutaka Kamei, Jacky Keung, Akito Monden, Ken-ichi Matsumoto
Venue: Proceedings of the Second ACM-IEEE international symposium on Empirical software engineering and measurement (2008)

This paper proposes a novel method to generate synthetic projectcases and add them to a fit dataset for the purpose of improving the performance of analogy-based software effort estimation. The proposed method extends conventional over-sampling method, which is a preprocessing procedure for n-group classification problems, which makes it suitable for any imbalanced dataset to be used in analogy-based system. We experimentally evaluated the effect of the over-sampling method to improve the performance of the analogy-based software effort estimation by using the Desharnais dataset. Results show significant improvement to the estimation accuracy by using our approach.
An Introduction to Authorization Conflict Problem in RDF Access Control
Authors: Jaehoon Kim, Kangsoo Jung, Seog Park
Venue: Proceedings of the 12th international conference on Knowledge-Based Intelligent Information and Engineering Systems, Part II (2008)

In this paper, related with RDF security, we introduce an RDF triple based access control model considering explicit and implicit authorization propagation. Since RDF Schema represents ontology hierarchy of upper and lower classes or properties, our access control model supports the explicit authorization propagation where an authorization specified against an upper concept is propagated to lower concepts by inheritance. In addition, we consider the implicit authorization propagation where an authorization specified against an lower concept is propagated to upper concepts by RDF inference. RDF Semantics, which is recommended by W3C, guides some primary RDF inference rules related with subClassOf and subPropertyOf where lower concepts are interpreted into upper concepts. Based on these two contrary propagations, we introduce an authorization conflict problem in RDF access control.
Tribological characterization and numerical wear simulation of microcomponents under sliding and rolling conditions
Authors: S. Kurzenh&#x00e4;user, V. Hegadekatte_aff2n5, J. Schneider, N. Huber, O. Kraft, K.-H. Zum Gahr
Venue: Microsystem Technologies (2008)

Increasing requirements for higher power densities and further miniaturisation in microsystem technology result in highly loaded micromechanical systems. Regarding these applications, the friction and wear behaviour of self-mated Si3N4 ceramic and WC-Co hardmetal has been characterized in laboratory micro tribometers. Experiments under unidirectional sliding and rolling conditions were carried out in air of 50% relative humidity as well as lubricated with water. Results from the model tests were used as input dataset for a numerical simulation tool Global Incremental Wear Model (GIWM) to predict volumetric wear as a function of operating conditions. The laboratory tests indicated that WC-Co as well as Si3N4 are applicable for microsystems running in water, due to their high wear resistance and low friction coefficient. Furthermore it was shown, that the numerical simulation can help to reduce the experimental effort by reliable predicting wear under different operating conditions, provided that the active wear mechanisms are comparable.
Thermoelectric Tactile Display Based on the Thermal Grill Illusion
Authors: Tal Oron-Gilad, Yael Salzer, Adi Ronen
Venue: Proceedings of the 6th international conference on Haptics: Perception, Devices and Scenarios (2008)

Among the challenges of haptic displays is the objective of creating a tactile language. Tactile language is used as a substitute to visual and auditory languages when either of the modalities is overloaded or impaired. Haptic displays have been implemented using a variety of technologies to stimulate different tactile sensations such as pressure, vibration and temperature. In this work, we present a novel implementation of a thermal sensation known as the Thermal Grill Illusion as the basis of a tactile language. A designated system, the Thermoelectric Tactile Display, was developed to generate Thermal Grill Illusion based stimuli. The usability of this type of display is being evaluated.
Fast Multipole Method for Time Domain PEEC Analysis
Authors: Giulio Antonini
Venue: IEEE Transactions on Mobile Computing (2003)

High-speed electronic circuits are becoming more and more important in modern communication systems, thus leading to an increasing interest in printed circuit boards, interconnect, and packaging. Nowadays, full-wave numerical methods are widely used in order to investigate both signal integrity and electromagnetic compatibility issues arising in PCBs design. When broadband information is desired and transient effects dominate, it is more efficient using time domain numerical techniques, which may scale better than corresponding frequency-domain methods. This paper presents the derivation of the time domain partial element equivalent circuit (PEEC) method enhanced by the three-dimensional (3D) fast multipole method (FMM). It is shown that combining the full-wave time domain PEEC method with the FMM allows performing the analysis of electrically large electronic systems, which reduces both memory and CPU-time requirements. Several examples are presented confirming the capability of the proposed approach to provide a significant reduction of the computational complexity associated with the transient analysis of large systems.
Backward Coupling in Bounded Free-Choice Nets Under Markovian and Non-Markovian Assumptions
Authors: Anne Bouillard, Bruno Gaujal
Venue: Discrete Event Dynamic Systems (2008)

In this paper, we show how to design a perfect sampling algorithm for stochastic Free-Choice Petri nets by backward coupling. For Markovian event graphs, the simulation time can be greatly reduced by using extremal initial states, namely blocking marking, although such nets do not exhibit any natural monotonicity property. Another approach for perfect simulation of non-Markovian event graphs is based on a (max,plus) representation of the system and the theory of (max,plus) stochastic systems. We also show how to extend this approach to one-bounded free choice nets to the expense of keeping all states. Finally, experimental runs show that the (max,plus) approach needs a larger simulation time than the Markovian approach.
Tackling the Error Correcting Code Problem Via the Cooperation of Local-Search-Based Agents
Authors: Jhon Edgar Amaya, Carlos Cotta, Antonio J. Fernández
Venue: Proceedings of the 2nd international work-conference on Nature Inspired Problem-Solving Methods in Knowledge Engineering: Interplay Between Natural and Artificial Computation, Part II (2007)

We consider the problem of designing error correcting codes (ECC), a hard combinatorial optimization problem of relevance in the field of telecommunications. This problem is firstly approached via a battery of local search (LS) methods that are compared and analyzed. Then, we study how to tackle this problem by having a society of interacting autonomous agents where each agent is endowed with a specific (not necessarily unique) strategy for local improvement. Distinct topologies and forms of interaction are analyzed and discussed in the paper. Specifically, it is shown how the election of the LS methods and their combination influences the results. An empirical evaluation shows that agent-based models are promising to solve of this problem.
A comparative study for the location and scale parameters of the Weibull distribution with given shape parameter
Authors: Yeliz Mert Kantar, Birdal Şenoğlu
Venue: Computers Geosciences (2008)

Nine parametric estimators of the location and scale parameters of a two-parameter Weibull distribution are compared in terms of their bias and efficiency in a simulation study. The estimators considered are the maximum likelihood estimators (MLE), moment estimators (ME), generalized spacing estimators (GSE), modified maximum likelihood estimators I (MMLE-I), modified maximum likelihood estimators II (MMLE-II), Tiku's modified maximum likelihood estimators (TMMLE), least-squares estimators (LSE), weighted least-squares estimators (WLSE) and percentile estimators (PCE). The aim of the comparisons is to identify the most efficient estimators among these nine estimators for different shape parameters and sample sizes.
A 2-Source Almost-Extractor for Linear Entropy
Authors: Anup Rao
Venue: Proceedings of the 11th international workshop, APPROX 2008, and 12th international workshop, RANDOM 2008 on Approximation, Randomization and Combinatorial Optimization: Algorithms and Techniques (2008)

We give an explicit construction of a function that is almost a 2-source extractor for linear entropy, it is a condenser where the output has almost full entropy. Given 2 sources with entropy ¿n, the output of the condenser is a distribution on m-bit strings that is -close to having min-entropy , where here m is linear in n.