ppxscal/embedding_network huggingface dataset:
Adaptive QoS-Aware Resource Management in Heterogeneous Wireless Networks
Authors: I-Shyan Hwang, Bor-Jiunn Hwang, K. Robert Lai, Ling-Feng Ku, Chien-Chieh Hwang
Venue: Proceedings of the 22nd International Conference on Advanced Information Networking and Applications - Workshops (2008)

The integration of different IP-based wireless networks, such as WiMAX and WiFi, becomes a 2-tier heterogeneous wireless networks is a more and morepopular issue. In order to support multiple types of service with different QoS requirements in heterogeneous wireless networks, efficient resource Management, call admission control strategies, mobility management and overflow handoff call are important issues. In this paper, we propose a resource management strategy including the call admission control, resource reservation mechanism for real-time services and Fuzzy controllers are proposed toadjusting bandwidth of real-time service with parameters dynamically. Simulation result shows that the proposed method improves the previous work (non-adaptivebandwidth borrowing reservation methods) and outperforms the traditional CAC in terms of call dropping probability and call blocking probability.
On ant routing algorithms in ad hoc networks with critical connectivity
Authors: Laura Rosati, Matteo Berioli, Gianluca Reali
Venue: Ad Hoc Networks (2008)

This paper shows a novel self-organizing approach for routing datagrams in ad hoc networks, called Distributed Ant Routing (DAR). This approach belongs to the class of routing algorithms inspired by the behavior of the ant colonies in locating and storing food. The effectiveness of the heuristic algorithm is supported by mathematical proofs and demonstrated by a comparison with the well-known Ad hoc On Demand Distance Vector (AODV) algorithm. The differences and the similarities of the two algorithms have been highlighted. Results obtained by a theoretical analysis and a simulation campaign show that DAR allows obtaining some important advantages that makes it a valuable candidate to operate in ad hoc networks and the same method helps in the selection of the algorithm parameters. Since the approach aims at minimizing complexity in the nodes at the expenses of the optimality of the solution, it results to be particularly suitable in environments where fast communication establishment and minimum signalling overhead are requested. These requirements are typical of ad hoc networks with critical connectivity, as described in the paper. Thus the performance of the proposed algorithm are shown in ad hoc networks with critical connectivity and compared to some existing ad hoc routing algorithms.
Reducing leakage power by accounting for temperature inversion dependence in dual-Vt synthesized circuits
Authors: Andrea Calimera, R. Iris Bahar, Enrico Macii, Massimo Poncino
Venue: Proceeding of the 13th international symposium on Low power electronics and design (2008)

The effects of temperature on delay depend on several parameters, such as cell size, load, supply voltage, and threshold voltage. In particular, variations in Vth can yield a temperature inversion effect causing a decreases of cell delay as temperature increases. This phenomenon, besides affecting timing analysis of a design, has important and unforeseeable consequences on power optimization techniques. In this paper, we focus on the impact of such effects on multi-Vt design; in particular, we show how traditional dual-Vt optimization may yield timing errors in circuits by ignoring temperature effects. Moreover, we present a temperature-aware dual-Vt optimization technique that reduces leakage power and can guarantee that the circuit is timing feasible at the boundary temperatures provided by the technology library. Our experiments show an average 27% leakage reduction with respect to a non temperature-aware design flow.
A Service Component Deployment Architecture for e-Banking
Authors: Jose Luis Ruiz, Juan Carlos Dueñas, Felix Cuadrado
Venue: Proceedings of the 22nd International Conference on Advanced Information Networking and Applications - Workshops (2008)

Service-oriented architectures (SOA) foster software reuse and loose coupling by means of strongly restricting interactions to service contracts. Many companies have identified in SOA an opportunity not only to improve their productivity but also to promote and extend their B2B relationships. The ITECBAN project is a significant reference of this process within the Spanish banking market. The scope of this paper is the implementation of the SOA paradigm in enterprise-class environments based on JEE technology. SCA (Service Component Architecture) and JBI (Java Business Integration)specifications have taken the first steps to support deployment of distributed services at the server-side Java platform. However, significant issues such as runtime service version management and context adaptation are still open. This paper presents a deployment solution for service-oriented JEE distributed systems based upon available specifications (SCA, OSGi and OMG Deployment and Configuration) and OSS implementations
Automatic Generation of High-level Contact State Space between 3D Curved Objects
Authors: Peng Tang, Jing Xiao
Venue: International Journal of Robotics Research (2008)

Information of high-level, topological contact states is useful and sometimes even necessary for a wide range of applications, from robotic tasks involving compliant motion to virtual prototyping and simulation. This paper addresses how to represent concisely and generate automatically graphs of contact states between 3D curved objects of a broad class, which may include smooth curved or planar surfaces. The approach is sound and complete if the step size of discretization is smaller than a finite threshold. By exploiting topological and geometrical constraints, it is also quite efficient. The implemented examples demonstrate the effectiveness of the approach.
Classification for accuracy and insight: a weighted sum approach
Authors: Anthony Quinn, Andrew Stranieri, John Yearwood
Venue: Proceedings of the sixth Australasian conference on Data mining and analytics - Volume 70 (2007)

This research presents a classifier that aims to provide insight into a dataset in addition to achieving classification accuracies comparable to other algorithms. The classifier called, Automated Weighted Sum (AWSum) uses a weighted sum approach where feature values are assigned weights that are summed and compared to a threshold in order to classify an example. Though naive, this approach is scalable, achieves accurate classifications on standard datasets and also provides a degree of insight. By insight we mean that the technique provides an appreciation of the influence a feature value has on class values, relative to each other. AWSum provides a focus on the feature value space that allows the technique to identify feature values and combinations of feature values that are sensitive and important for a classification. This is particularly useful in fields such as medicine where this sort of micro-focus and understanding is critical in classification.
Distributional LK transform, distributional impulsive signals and system response
Authors: P. A. Gulhane, A. S. Gudadhe, A. A. Gulhane
Venue: Proceedings of the 7th WSEAS International Conference on Applied Mathematics (2005)

The theory of distributional (generalized functions) provides a natural language for impulsive signals (singularity signals) which occurs in many signals and system response such as communication, relativity, energy generation etc. This paper deals with distributional generalized Laplace-Meijer (GLK) transform of distributional singals f. The present paper also provides analyticity theorem and representation theorem for the defined transform. Our universe is a big source of energy and we make an attempt by contempleting the possible application of GLK transform to diffusion in cylinder.
Multimodal question answering for mobile devices
Authors: Tom Yeh, Trevor Darrell
Venue: Proceedings of the 13th international conference on Intelligent user interfaces (2008)

This paper introduces multimodal question answering, a new interface for community-based question answering services. By offering users an extra modality---photos---in addition to the text modality to formulate queries, multimodal question answering overcomes the limitations of text-only input methods when the users ask questions regarding visually distinctive objects. Such interface is especially useful when users become curious about an interesting object in the environment and want to know about it---simply by taking a photo and asking a question in a situated (from a mobile device) and intuitive (without describing the object in words) manner. We propose a system architecture for multimodal question answering, describe an algorithm for searching the database, and report on the findings of two prototype studies.
Strategic manufacturing system and process innovation through elimination of trade-offs
Authors: Mehdi Shahbazpour, Rainer Seidel
Venue: International Journal of Computer Integrated Manufacturing (2007)

For many years, there has been a debate among researchers and practitioners about the notion of trade-offs and their role in manufacturing strategy. This paper examines the practical issues surrounding trade-offs and manufacturing strategy, and offers a framework for better management of trade-offs. The analysis indicates that current views on trade-offs are either impractical or static. The authors propose a consolidated approach in which the focus of strategic improvement process is divided into short-term and long-term strategies. It is suggested that in the short term, strategic initiatives must focus on overcoming 'perceived' trade-offs and system constraints in order to achieve the firm's Manufacturing Performance Potential. In the long term, they must focus on eliminating the 'real' trade-offs and technical constraints of the system in order to achieve world-class levels of performance. While the current approaches to trade-off improvement focus on compromises and/or application of current 'best practices', manufacturing system and process innovation are proposed as the key to the elimination of trade-offs. Two problem-solving methodologies, Theory of Constraints and Theory of Inventive Problem Solving, were found to provide useful tools necessary for system and process innovation. With the aid of a case study, we demonstrate how these methodologies can be used to eliminate manufacturing trade-offs, in order to improve a company's competitiveness.
A Method of Visualizing Inter-Module Relations to Support Reuse-Based Embedded Software Development
Authors: Hidetoshi Kambe, Hiroko Nagamatsu, Hiroyasu Mitsui, Hisao Koizumi, Jun Sawamoto
Venue: Proceedings of the 22nd International Conference on Advanced Information Networking and Applications (2008)

The demand for embedded software is growing, and the number of development steps tends to increase with shorter period for development. It becomes inevitable to re-use existing software resources. However, if the configuration management of the existing software for reuse is not sufficient, it becomes hard to predict which modules in a system would be affected by the reused software modules. This may result in generating new bugs in the system. In this paper, we propose a method to accomplish the effective reuse of software modules by managing dependency information among modules. The method analyzes mutual relations among existing modules and visually presents not only inter-module dependency but also a list of reusable modules based on the developer’s demand. We evaluated the method by applying it to some actual developments.
Ontology-supported quality assurance for component-based systems configuration
Authors: Stefan Biffl, Richard Mordinyi, Thomas Moser, Dindin Wahyudin
Venue: Proceedings of the 6th international workshop on Software quality (2008)

Systems development needs to reconcile views from many roles, such as domain experts and engineers. A particular challenge is the multitude of models for requirements and quality, which can get time consuming and error prone to trace, change, and verify. In this paper we introduce an ontology-supported component-based systems engineering approach for the production automation domain that describes explicitly stakeholder quality requirements and traces design decisions to generate new system and software versions that implement these requirements. The ontology approach is expected to allow continuous modeling and extracting model views for all roles involved to a) improve the quality assurance of system requirements; b) support more explicit feedback on the quality of intermediate models during systems development; and c) provide better auditing capabilities of the systems development process. Based on an industry case study, we describe the ontology concept of the system, the development process, and how software quality can be measured and improved.
Performance evaluation of selective summary cache via simulations
Authors: Rohan De Silva
Venue: Proceedings of the 2nd WSEAS International Conference on Electronics, Control and Signal Processing (2003)

Web caching is a mechanism used to store frequently accessed documents at a server closer to the users. In e-commerce applications and financial market services, information contained in the objects delivered by the origin server to the clients can rapidly change with time. Therefore, the challenge is not only to locate a cache that contains the required object but also to select the most current version of the object out of all the possible caches. While there are several approaches to locate the cached objects in the Internet in the case of static objects, the extension of these methods to rapidly changing objects is not straightforward. As such, we developed a new method called the selective summary cache to locate the best possible version of the object. In this paper, we present the simulation results that compare the performance of selective summary cache with that of the summary cache. Following on from the results of the simulations, we were able to introduce modifications to improve the performance of the selective summary cache.
A new method for fast transforms in parity-mixed PDEs: Part II. Application to confined rotating convection
Authors: Geoffrey M. Vasil, Nicholas H. Brummell, Keith Julien
Venue: Journal of Computational Physics (2008)

To demonstrate the utility of the parity filtering methods described by Vasil et al. [G. Vasil, N. Brummell, K. Julien, A new method for fast transforms in parity-mixed PDEs: Part I. Numerical techniques and analysis, J. Comput. Phys. (2008)], we introduce a numerical code designed to solve for Rayleigh-Benard convection in a confined rotating box using the new methods we have formulated. That is, using a straightforward pseudospectral framework, we incorporate techniques for efficiently computing parity-mixed Coriolis accelerations in a time-dependent numerical solver. The goals of the presented numerical code are to provide a tool to investigate aspects of confined rotating convection experiments with a simple model, and to illustrate the application of parity filtering. In our numerical tests, we find that a correct accounting for parity leads to clear and interesting behavior that has been observed in laboratory experiments but that has not been observed in previous numerical simulations in periodic domains.
A self-organizing group management middleware for mobile ad-hoc networks
Authors: Dario Bottazzi, Rebecca Montanari, Giovanni Rossi
Venue: Computer Communications (2008)

The growing proliferation of portable devices, along with the recent advances in Mobile Ad-Hoc NETworks (MANETs) technology open a new technology scenario where users require to collaborate together with their neighbors any-where, at any-time, and without the need of a priori planned communication infrastructure. However, the highly dynamic nature characterizing MANETs, the impossibility of manual or centralized configuration of these environments, along with the heterogeneous capabilities of user devices complicate much collaboration management and call for the investigation of novel solutions with self-organization properties. Groups and superpeer-based Peer-to-Peer (P2P) models and architectures seem particularly well suited for supporting collaboration in MANETs. The paper proposes CAMPE, a self-organizing group management solution, able to compose logical groups of peers with similar interests and goals, to partition groups in different management domains, and to assign differentiated management roles to available peers according to trade-off solutions between a multiplicity of possibly inconsistent and contrasting management criteria, e.g., peer proximity and mobility patterns. In particular, the CAMPE self-organization support adopts a cooperative game-theoretical approach to collaboration management and bases all management decisions on Multi-Criteria Decision Making (MCDM) techniques.
Systematic error in the determination of perimeter and area of off-lattice digitalized images
Authors: A. R. Imre
Venue: International Journal of Remote Sensing (2007)

The correct determination of the perimeter and area of 2D digital images is a crucial point for image analysis. In this short paper, we would like to report the existence of a systematic error of perimeter and area determination of raster images. This problem is caused by the sub-pixel dislocation of the original pictures during scanning/digitalizing. The effect of this error is demonstrated here on two examples: by showing how it changes the outcome of the fractal dimension measurements (using the perimeter-area relation) and how it changes the habitat-ranking of forest fragments (using the interior-to-edge ratio).
Environment-Awareness: Quantitative Processing of Context Changes
Authors: Andreas Heil, Martin Gaedke
Venue: Proceedings of the 2008 Sixth Annual IEEE International Conference on Pervasive Computing and Communications (2008)

Comparing context of different entities is not easy at all. Since context depends on the situation of a particular entity it can be understood in different ways by various entities. In this paper we introduce an approach to consider all entities as environment in which the formal interpretation of all available context and its changes can be quantified and used to find optimal decisions within such an environment-aware system.
Who leads our future leaders?: on the rising relevance of social competence in software development
Authors: Oliver Creighton, Matthias Singer
Venue: Proceedings of the first international workshop on Leadership and management in software architecture (2008)

Siemens is currently developing a curriculum for several software engineering roles. Our first step was the role of Senior Software Architect. As social competence becomes increasingly important for all software professionals, we argue that reflection is the key to improve a person's skill profile. We believe that a standard component of software development education should be the ability to realistically self-assess one's own effectiveness.
Well-separated pair decomposition in linear time?
Authors: Timothy M. Chan
Venue: Information Processing Letters (2008)

Given a point set in a fixed dimension, we note that a well-separated pair decomposition can be found in linear time if we assume that the ratio of the farthest pair distance to the closest pair distance is polynomially bounded. Many consequences follow; for example, we can construct spanners or solve the all-nearest-neighbors problem in linear time (under the same assumption), and we compute an approximate Euclidean minimum spanning tree in linear time (without any assumption).
Bootstrap and fast double bootstrap tests of cointegration rank with financial time series
Authors: N. Ahlgren, J. Antell
Venue: Computational Statistics Data Analysis (2008)

The likelihood ratio test of cointegration rank is the most widely used test for cointegration. Many studies have shown that its finite sample distribution is not well approximated by the limiting distribution. Bootstrap and fast double bootstrap (FDB) algorithms for the likelihood ratio test are introduced and evaluated by Monte Carlo simulation experiments. It is found that the performance of the ordinary (single) bootstrap test is in most cases good in terms of the size of the test. The FDB produces a further improvement in cases where the performance of the asymptotic test is unsatisfactory and the single bootstrap test overrejects noticeably. The FDB is shown to be a useful supplement to the single bootstrap as a tool for determining the cointegration rank. The tests are applied to US interest rates and international stock prices series. By simulating the data assuming that the cointegration rank is known, it is found that the asymptotic test tends to overestimate the cointegration rank, while the bootstrap and FDB tests choose the correct cointegration rank.
Node Criticality Computation for Circuit Timing Analysis and Optimization under NBTI Effect
Authors: Wenping Wang, Shengqi Yang, Yu Cao
Venue: Proceedings of the 9th international symposium on Quality Electronic Design (2008)

For sub-65nm technology nodes, Negative Bias Temperature Instability (NBTI) has become a primary limiting factor of circuit lifetime. During the past few years, researchers have spent considerable and continuous efforts on modeling and characterization of NBTI-caused delay degradation at different design levels. Searching for solutions which can effectively reduce NBTI impact on circuit delay is still under way. In this work, we use node criticality computation to drive NBTI aware timing analysis and optimization. Circuits after being applied this optimization flow show strong resistance to NBTI delaydegradation. Particularly, for the first time, we propose node criticality computation algorithm under the NBTI aware timing analysis and optimization framework and give answers to the following questions which have not been answered yet. They are: (1) how to define node criticality in a circuit under NBTI effect; (2) how to find the critical nodes which once are protected NBTI timing degradation will be effectively reduced. Experimental results show that by protecting the critical nodes found by this framework, circuit delay degradation can be reduced by up to 50%.
The opposite of smoothing: a language model approach to ranking query-specific document clusters
Authors: Oren Kurland
Venue: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval (2008)

Exploiting information induced from (query-specific) clustering of top-retrieved documents has long been proposed as means for improving precision at the very top ranks of the returned results. We present a novel language model approach to ranking query-specific clusters by the presumed percentage of relevant documents that they contain. While most previous cluster ranking approaches focus on the cluster as a whole, our model also exploits information induced from documents associated with the cluster. Our model substantially outperforms previous approaches for identifying clusters containing a high relevant-document percentage. Furthermore, using the model to produce document ranking yields precision-at-top-ranks performance that is consistently better than that of the initial ranking upon which clustering is performed; the performance also favorably compares with that of a state-of-the-art pseudo-feedback retrieval method.