ppxscal/embedding_network huggingface dataset:
Realization of wireless multimedia communication systems on reconfigurable platforms
Authors: K. Masselos, A. Pelkonen, M. Cupak, S. Blionas
Venue: Journal of Systems Architecture: the EUROMICRO Journal (2003)

Wireless multimedia communication systems become increasingly more computational intensive and demand for higher flexibility. The realization of these systems on reconfigurable hardware offers a good balance for these requirements. In this paper the suitability of commercially available reconfigurable hardware platforms for the target application domain is evaluated. Based on this evaluation a heterogeneous partly reconfigurable system-on-chip platform is identified as ideal implementation platform for the targeted systems. Systems from different target domains are analysed and different cases where the inclusion of reconfigurable hardware in their realizations would lead to improved quality in terms of implementation efficiency and flexibility are identified, Design methodology requirements for the realization of systems from the target application domain on the targeted platform are analysed and issues not covered by existing methodologies are identified. The principles of a methodology handling these open issues are described. Results from the prototyping of different systems are also presented and show the potentials of a reconfigurable hardware platform, which in the future will lead to reduced costs and increased flexibility of the wireless multimedia communication systems.
Automatic test program generation for pipelined processors
Authors: F. Corno, G. Cumani, M. Sonza Reorda, G. Squillero
Venue: Proceedings of the 2003 ACM symposium on Applied computing (2003)

The continuous advances in microelectronics design are creating a significant challenge to design validation in general, but tackling piplined microprocessors is remarkably more demanding. This paper presents a methodology to automatically induce a test program for a microprocessor maximizing a given verification metric. The approach exploits a new evolutionary algorithm, close to Genetic Programming, able to cultivate effective assembly-language programs. The proposed methodology was used to verify the DLX/pII, an open-source processor with a 5-stage pipeline. Code-coverage was adopted in the paper, since it can be considered the required starting point for any simulation-based functional verification processes. Experimental results clearly show the effectiveness of the approach.
Adaptive low-power address encoding techniques using self-organizing lists
Authors: Mahesh N. Mamidipaka, Daniel S. Hirschberg, Nikil D. Dutt
Venue: IEEE Transactions on Very Large Scale Integration (VLSI) Systems (2003)

Off-chip bus transitions are a major source of power dissipation for embedded systems. In this paper, new adaptive encoding schemes are proposed that significantly reduce transition activity on data and multiplexed address buses. These adaptive techniques are based on self-organizing lists to achieve reduction in transition activity by exploiting the spatial and temporal locality of the addresses. Also the proposed techniques do not require any extra bit lines and have minimal delay overhead. The techniques are evaluated for efficiency using a wide variety of application programs including SPEC 95 benchmark set. Unlike previous approaches that focus on instruction address buses, experiments demonstrate significant reduction in transition activity of up to 54% in data address buses and up to 59% in multiplexed address buses. The average reductions are twice those obtained using current schemes on a data address bus and more than twice those obtained on a multiplexed address bus.
Cyber Crime Information System for Cyberethics Awareness
Authors: A. B. Patki, S. Lakshminarayanan, S. Sivasubramanian, S. S. Sarma
Venue: Proceedings of the 2003 International Conference on Cyberworlds (2003)

Cyber Civilization considers knowledge as anintegral part of society and human systems. With thefacilities of cyber civilization the evils of cyber civilizationalso need to be equally tackled through technological aswell as social means. Efforts on the lines of centralized aswell as globally sharable resource and supportinfrastructure appear to be the need. The paper builds acase for consideration and support from United Nations.Such an infrastructure set up can use portal basedsystems deploying fuzzy data bases.
Geotracker: a global weather snapshot
Authors: Marcos Weskamp
Venue: ACM SIGGRAPH 2003 Web Graphics (2003)

geoTracker is an application that provides a visitor-based snapshot of the global weather in near-real time.As each visitor enters the application they start on a world map at their location, and their current weather is displayed. Then, they can travel around the world looking at information for other cities in other countries. Most importantly, all user's paths are visible to everyone else.
Retrieval operations and data representations in a context-addressed disc system
Authors: Stanley Y. W. Su, George P. Copeland, G. Jack Lipovski
Venue: Proceedings of the 1973 meeting on Programming languages and information retrieval (1973)

This paper attempts to demonstrate that simple expansion of the processing capabilities of fixed disc read and write heads can avoid the multilevel mappings from high-level retrieval language to machine language and from user oriented data representation (information structure) to machine oriented data representation (storage structure) which are found necessary in conventional von Neumann computers. The processing capabilities built in the disc read and write heads for each disc track allow information files to be segmented and data items stored on all segments to be searched, modified, inserted, deleted, rearranged and rewritten simultaneously as a set of discs are rotating. Information structures such as the network structure, the hierarchical or tree structure and the relational structure are discussed and their implementations and basic search operations in the disc system are described.
Towards model-based generation of self-priming and self-checking conformance tests for interactive systems
Authors: Amit Paradkar
Venue: Proceedings of the 2003 ACM symposium on Applied computing (2003)

This paper describes a model-based approach to generate conformance tests for interactive applications. Our method builds on existing work to address generation of: (1) small yet effective set of test frames for testing individual operations, (2) a Set up sequence that brings the system under test in an appropriate state for a test frame (self-priming), (3) a Verification sequence for expected output and state changes (self-checking), and, (4) negative test cases in the presence of exceptions. Our method exploits a novel mutation scheme applied to operations specified as pre-, and postconditions on parameters and state variables; a set of novel abstraction techniques which result in a compact finite state automaton; and search techniques to automatically generate the set up and verification sequences. We illustrate our method with a simple ATM application.
Blind separation of post-nonlinear mixtures using linearizing transformations and temporal decorrelation
Authors: Andreas Ziehe, Motoaki Kawanabe, Stefan Harmeling, Klaus-Robert Müller
Venue: The Journal of Machine Learning Research (2003)

We propose two methods that reduce the post-nonlinear blind source separation problem (PNL-BSS) to a linear BSS problem. The first method is based on the concept of maximal correlation: we apply the alternating conditional expectation (ACE) algorithm---a powerful technique from non-parametric statistics---to approximately invert the componentwise non-linear functions.The second method is a Gaussianizing transformation, which is motivated by the fact that linearly mixed signals before nonlinear transformation are approximately Gaussian distributed. This heuristic, but simple and efficient procedure works as good as the ACE method.Using the framework provided by ACE, convergence can be proven. The optimal transformations obtained by ACE coincide with the sought-after inverse functions of the nonlinearities. After equalizing the nonlinearities, temporal decorrelation separation (TDSEP) allows us to recover the source signals. Numerical simulations testing "ACE-TD" and "Gauss-TD" on realistic examples are performed with excellent results.
Topology discovery for public IPv6 networks
Authors: Daniel G. Waddington, Fangzhe Chang, Ramesh Viswanathan, Bin Yao
Venue: ACM SIGCOMM Computer Communication Review (2003)

In just three decades the Internet has grown from a small experimental research network into a complex network of routers, switches, and hosts. Understanding the topology of such large scale networks is essential to the procurement of good architectural design decisions, particularly with respect to address allocation and distribution schemes.A number of techniques for IPv4 network topology already exist. Of these ICMP-based probing has shown to be most useful in determining router-level topologies of public networks. However, many of these techniques cannot be readily applied to IPv6 because of changes in the addressing scheme and ICMP behaviour. Furthermore, increases in the proliferation of equal-cost multi-path routing, and other forms of transient routing, indicate that traditional traceroute-based topology discovery approaches are becoming less effective in the Internet.This paper presents Atlas, a system that faciliates the automated capture of IPv6 network topology information from a single probing host. It describes the Atlas infrastructure and its data collection processes and discusses IPv6 network phenomena that must to be taken into account by the probing scheme. We also present some initial results from our probing of the 6Bone, currently the largest public IPv6 network. The results illustrate the effectiveness of the probing algorithm and also identify some trends in prefix allocation and routing policy.
Function Learning from Interpolation
Authors: Martin Anthony, Peter L. Bartlett
Venue: Combinatorics, Probability and Computing (2000)

In this paper, we study a statistical property of classes of real-valued functions that we call approximation from interpolated examples. We derive a characterization of function classes that have this property, in terms of their &lsquo;fat-shattering function&rsquo;, a notion that has proved useful in computational learning theory. The property is central to a problem of learning real-valued functions from random examples in which we require satisfactory performance from every algorithm that returns a function which approximately interpolates the training examples.
Floating point arithmetic teaching for computational science
Authors: José-Jesús Fernández, Inmaculada García, Ester M. Garzón
Venue: Future Generation Computer Systems (2003)

Computational science is based upon numerical computing and, consequently, requires excellent knowledge of floating point computer arithmetic. In general, the average computational science student has a relatively limited understanding of the implications of floating point computation. This paper presents an initiative to teach floating point number representation and arithmetic in undergraduate courses in computational science. The approach is based on carefully designed practical exercises which highlight the main properties and computational issues of finite length number representation and arithmetic. In conjunction to the exercises, an auxiliary educational tool constitutes a valuable support for students to learn and understand the concepts involved. Simpler formats are used as an introduction to the IEEE 754 standard, with the aim of presenting the fundamentals of the floating point computation and emphasizing its limitations. This approach could be included in courses related to computer organization, programming, discrete mathematics, numerical methods or scientific computing in computational science curricula.
Sigmoidal Function Classes for Feedforward Artificial Neural Networks
Authors: Pravin Chandra
Venue: Neural Processing Letters (2003)

The role of activation functions in feedforward artificial neural networks has not been investigated to the desired extent. The commonly used sigmoidal functions appear as discrete points in the sigmoidal functional space. This makes comparison difficult. Moreover, these functions can be interpreted as the (suitably scaled) integral of some probability density function (generally taken to be symmetric/bell shaped). Two parameterization methods are proposed that allow us to construct classes of sigmoidal functions based on any given sigmoidal function. The suitability of the members of the proposed class is investigated. It is demonstrated that all members of the proposed class(es) satisfy the requirements to act as an activation function in feedforward artificial neural networks.
On the boundary integral formulation of the plane theory of elasticity (computational aspects)
Authors: M. S. Abou-Dina, A. F. Ghaleb
Venue: Journal of Computational and Applied Mathematics (2003)

A numerical scheme is proposed for the solution of the system of field equations and boundary conditions of the static, linear plane strain problem of the Theory of Elasticity in stresses. The work is based on a previous analytical approach by the authors within the Boundary Integral Method for a homogeneous and isotropic elastic material occupying a simply connected region. The differential and integral operators appearing in the resulting system of integro-differential equations for the determination of the boundary values of four unknown harmonic functions are discretized and the problem at this stage is reduced to finding the solution of a linear system of algebraic equations. Formulae are provided for the determination of the displacements and stresses at the boundary. As an illustration, the proposed numerical scheme is applied to find the solution of the following problems: (i) a nearly-circular boundary subject to a uniform pressure or to a uniform normal displacement; (ii) a square subject to a uniform pressure or to different prescribed normal displacements. This choice of the problems has allowed to assess the efficiency of the method through comparison with known analytical solutions and to test the accuracy of the results under different smoothness properties of the boundary and boundary conditions. Whenever new, the obtained results were thoroughly discussed.Future work in this field will be devoted to the extension of the method to include multiply connected regions and mixed boundary conditions, and to investigate the prediction and isolation of the singularities in the solution, caused by boundary irregularities.
Linear Control Systems on Unbounded Time Intervals and Invariant Measures of Ornstein--Uhlenbeck Processes in Hilbert Spaces
Authors: Marco Fuhrman, Anna Maria Paganoni
Venue: SIAM Journal on Control and Optimization (2003)

We consider linear control systems in a Hilbert space over an unbounded time interval of the form $$ y_\alpha'(t)=(A-\alpha I)y_\alpha(t)+Bu(t), \qquad t\in (-\infty, T], $$ with bounded control operator B, under appropriate stability assumptions on the operator A. We study how the space of states reachable at time T depends on the parameter $\alpha\geq 0$. We apply the results to study the dependence on $\alpha$ of the Cameron--Martin spaces of the invariant measures of the Ornstein--Uhlenbeck processes $X_\alpha$ defined by the equation driven by the Wiener process W: $$ dX_\alpha(t) = (A-\alpha I) X_\alpha(t)\; dt + B\; dW(t),\qquad t\geq 0.
An overview of the diffusion of advanced techniques
Authors: Davood Askarany
Venue: Advanced topics in global information management (2003)

This chapter addresses a variety of factors influencing the diffusion of advanced techniques in organizations with particular reference to advanced cost and management accounting practices. Having identified almost all of influencing factors addressed in the literature, this chapter also develops a model for the diffusion of advanced techniques and clarifies the most significant group of influencing factors responsible for such a diffusion process from users' point of view.Addressing diffusion of advanced techniques in the global environment as a practical issue requires global evidence, which is almost impossible to provide in a single study. However, to address such an issue and to explore significant factors influencing the diffusion of advanced techniques in the organizations, this chapter relies on the results of recent surveys on the diffusion of advanced cost and management accounting techniques as an example. The diffusion model developed in this chapter is more likely to be applicable to any diffusion study, investigating the diffusion process of either accounting or nonaccounting advanced techniques in the global environment, with minor modification.
Users Inventing Ways to Enjoy New Mobile Services -- The Case of Watching Mobile Videos
Authors: Petteri Repo, Kaarina Hyvönen, Mika Pantzar, Päivi Timonen
Venue: Proceedings of the Proceedings of the 37th Annual Hawaii International Conference on System Sciences (HICSS'04) - Track 4 - Volume 4 (2004)

The introduction and marketing of third-generation mobile services has not been enough to make them a commercial success. User involvement and user innovations are apparently needed before such success can be achieved.We handed out mobile phones with video capability to test users to see what kind of meaningful contexts they might find for watching streaming mobile video. There were at least two different contexts in which they considered it natural to view mobile video. Firstly, they were able to avoid boring situations by entertaining themselves. Secondly, mobile video made it possible to share experiences with other people. Singing karaoke together or watching cartoons with children offered fun moments and represented a type of use not frequently found in visions of mobile entertainment.
A study of an automatic learning model of adaptation knowledge for case base reasoning
Authors: Malrey Lee
Venue: Information Sciences: an International Journal (2003)

This paper proposes an algorithm to acquire adaptation knowledge through case comparison in order to extract connoted knowledge that is contained in cases. To acquire adaptation knowledge from cases in case base, comparable cases are selected. This paper also propose a similarity method for the selection of comparable cases.For simulation, the case of deciding automobile price is considered to look into how much the acquired adaptation rules through case comparison are effective in improving the precision of problem solving. Simulation results show that a system using the extracted adaptation knowledge provided higher precision of solution than a system supporting only case extraction, and even when the loss value of case attributes and case solutions were inaccurate, the acquired adaptation rules could improve the precision.
Design studies for a financial management system for micro-credit groups in rural india
Authors: Tapan Parikh, Kaushik Ghosh, Apala Chavan
Venue: Proceedings of the 2003 conference on Universal usability (2003)

In this paper we describe the design process, results and observations obtained in designing a user interface for managing community-based financial institutions in rural India. The primary users are semi-literate village women from local communities. We present detailed observations from our field visits and the resulting evolution in our design vision. We describe a successful design artifact that is the result of this process, and list several important features that contributed to its success. We conclude with the current state of our work and our plans for the future.
A semantic model for flash retrieval using co-occurrence analysis
Authors: Dawei Ding, Qing Li, Bo Feng, Liu Wenyin
Venue: Proceedings of the eleventh ACM international conference on Multimedia (2003)

Flash is experiencing a breathtaking growth and has become one of the prevailing media formats on the Web. Our goal is to exploit the enormous Flash resources by developing a model of content-based Flash retrieval. Towards this end, we introduce a novel approach for discovering semantic relationships among the co-occurrence patterns of elements in Flash movies. The proposed approach includes a three-layered structure to index the Flash movie, a query expansion procedure to improve the recall performance, and a relevance ranking procedure utilizing link analysis to improve the precision performance of Flash retrieval. Experiments show the potential of leveraging co-occurrence analysis of elements in the context of scenes for improving the performance of Flash retrieval.
Music negotiation: routes in user-based description of music
Authors: Dante Tanzi
Venue: Organised Sound (2001)

This paper will deal with the changes that have come about in the description of musical knowledge and with the ensuing needs in this field in the era of decentralisation. Throughout almost all the twentieth century, musical practices continued to be expressed by a system of cultural mediations that proved to be a practical impediment to the emergence of non-conventional cultures. Electronic music in particular and its corrosive tendencies, though spread and supported by remarkable composers, has ended up being devoured by academic immune systems. Now that the diffusion of Net computing has induced people to intervene in musical material, a poetics based on interference is spreading. By gaining ground on grammatical and self-referenced poetics, this trend has gradually become a palpable fact and music perceives itself as both individual writing and a production of social meaning. At present, a globe-net-transfer of sound material passes through different contexts and spaces, and seems to be adapting itself to different social speeds. Through the Net we can, on the one hand, replace, manipulate and recontextualise musical parameters until a different significance emerges; at the same time, randomising and hybridising musical objects can partially change our perception of the same musical events. On the other hand, music online databases, audio browsers and musical queries may open the way to overthrowing, reorganising and personalising music description. This could occur at different levels and to different degrees of complexity, both as a social event and as an active, user-based combination of musical structures.
S3: Senior surf school: a special graduate information systems course
Authors: Georg Disterer
Venue: Current issues in IT education (2003)

Many elderly people (age of 60+) are keen on getting familiar with the Internet. At the same time, end-user training gets more and more important for IT management. Therefore, we implemented a graduate Information Systems course, where students have to design, organize, manage, and run a training session, where elderly people can see and try using the Internet. The students learned to design a teaching curriculum and teaching materials, to set up and maintain the technical infrastructure, to organize end-user training, and, most importantly, to teach and to train end-users.