ppxscal/embedding_network huggingface dataset:
Construction and Application of Hybrid Wavelet and Other Parametric Orthogonal Transforms
Authors: Hakob Sarukhanyan, Arthur Petrosian
Venue: Journal of Mathematical Imaging and Vision (2005)

We introduce new methods for construction and implementation of various parametric and hybrid orthogonal transforms, including generalized Haar-like, Daubechies, and Coiflet wavelet transforms. The corresponding fast algorithms of computations are briefly discussed and the variance properties of these transforms in analyzing 1-st order Markov processes are investigated. The designed hybrid transforms can be useful in various specific signal processing applications where combining properties of Hadamard and wavelet transforms may be of particular benefit. We also present some numerical results pertaining to image zonal and threshold coding using these hybrid transforms and compare their efficacy with those of traditional orthogonal transforms.
Design Issues in Ethical Agent Computing
Authors: L. Pretorius, A. Barnard, E. Cloete
Venue: ACM SIGCAS Computers and Society (2004)

Agent computing, and in particular intelligent mobile agent computing, is at present awarded increasing prominence in the literature. This is partly due to the pervasive nature of available Internet technologies such as search engines and booking agents. It is within this context that the importance of investigating various characteristics demonstrated by mobile agent computing is becoming apparent. In order to perform specialized tasks on behalf of their owners, a certain amount of intelligence in mobile agents is often assumed or expected. The attribute intelligent brings with it a concomitant human characteristic that is assigned to an inanimate technological object. In mobile agent systems, communities of agents (some with embedded intelligence, and some without) already inhabit areas of cyberspace and interact with other agents, human users and hosts. Depending on the expected interaction with other entities, it is plausible to think that such a community can exhibit a social life of its own. This raises issues concerning information security as well as the ethical and social behaviour of mobile agents. In this paper we discuss a framework for dealing with the security and ethical design issues of this technology.
Visualizing structural properties of irregular parallel computations
Authors: Wolfgang Blochinger, Michael Kaufmann, Martin Siebenhaller
Venue: Proceedings of the 2005 ACM symposium on Software visualization (2005)

An important task in parallel programming is the appropriate distribution of work on the processors. This distribution is usually dynamically changing and hard to predict, further it is very sensitive to the change of parameters. Even with advanced analysis tools this problem is hard to be solved. We propose to visualize the program structure as it changes over the execution time. We therefore present a new automatic layout algorithm based on Sugiyama's framework, which enables the user to detect structural patterns which might be fatal for the performance of the program - patterns which might be impossible to detect in a more analytical way. Furthermore it assists the user to find appropriate timing parameters for load balancing. We integrate our visualization into an integrated development environment that supports the implementation, execution, and analysis of parallel programs.
A Study of the In-Practice Application of a Commercial Software Architecture
Authors: Rob Barrow, Keith Frampton, Margaret Hamilton, Bruce Crossman
Venue: Proceedings of the 2005 Australian conference on Software Engineering (2005)

In recent years, the size and complexity of information systems have grown, with a resulting increased emphasis on using a software development methodology in the belief that by doing so, the experience of other, more experienced, developers can be re-used. Recent studies however, have found that developers do not adhere rigidly to a methodology, but usually adapt it to their specific needs. Also, the extent to which individual software architects apply a specific software architecture development method in practice is largely unexplored. This paper reports on the in practice use of a proprietary software architecture development method, the IBM Custom Application Design. It describes the current state of understanding of application of software architecture methods, explains the research approach applied, reports on the results of the survey and workshops, and describes possible future work. We found that software architects, like software and requirements engineers, do not adhere rigidly to a method. Furthermore, we have identified that there are multiple levels at which the modification to a method can be undertaken. These are "Tailoring", "Adapting" and "Customizing". We also found that a unique version of a method is created for each project and IBM IT architects rely extensively on tools and techniques for visual communication as one of the key ways in which they work. These are important findings for commercial organizations which develop and/or use methods, and for academic institutions which teach software architecture.
A Highly Parallel Algorithm for the Numerical Simulation of Unsteady Diffusion Processes
Authors: Yu Zhuang, Xian-He Sun
Venue: Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Papers - Volume 01 (2005)

Stabilized explicit implicit domain decomposition (SEIDD) is a class of globally non-iterative domain decomposition methods for the numerical simulation of unsteady diffusion processes on parallel computers. By adding a communication-cost-free stabilization step to the explicit-implicit domain decomposition (EIDD) methods, the SEIDD methods achieve high stability but with the restriction that the interface boundaries have no crossing-overs inside the domain. In this paper, we present a parallelized SEIDD algorithm with paralellism higher than the number of subdomains, eliminating the disadvantage of non-crossing-over interface boundaries at a slight computation cost.
A Response to Webb and Ting's On the Application of ROC Analysis to Predict Classification Performance Under Varying Class Distributions
Authors: Tom Fawcett, Peter A. Flach
Venue: Machine Learning (2005)

In an article in this issue, Webb and Ting criticize ROC analysis for its inability to handle certain changes in class distributions. They imply that the ability of ROC graphs to depict performance in the face of changing class distributions has been overstated. In this editorial response, we describe two general types of domains and argue that Webb and Ting's concerns apply primarily to only one of them. Furthermore, we show that there are interesting real-world domains of the second type, in which ROC analysis may be expected to hold in the face of changing class distributions.
Implementation of wireless network environments supporting inter access point protocol and dual packet filtering
Authors: Liang-Yi Hwang, Mei-Ling Chiang, Ruei-Chuan Chang
Venue: Journal of Systems and Software (2005)

With advances in wireless technologies, future internetworks will include large numbers of mobile hosts roaming across wireless cells. The goal of this paper is to provide a wireless network communication environment, in which mobile hosts can roam among various access points (wireless cells) and across different subnets. For this purpose, we develop methods to implement and integrate the communication mechanisms of Mobile IP and Inter Access Point Protocol (IAPP). For efficient transmission, we also devise a dual packet filtering technique to filter out unnecessary packet transmission, thereby reducing traffic on wireless networks. Such filtering is especially important because of the limited bandwidth of wireless links. Our work can serve as the reference once IAPP has been approved as standard.
Dialogue interaction with the DARPA communicator infrastructure: the development of useful software
Authors: Samuel Bayer, Christine Doran, Bryan George
Venue: Proceedings of the first international conference on Human language technology research (2001)

To support engaging human users in robust, mixed-initiative speech dialogue interactions which reach beyond current capabilities in dialogue systems, the DARPA Communicator program [1] is funding the development of a distributed message-passing infrastructure for dialogue systems which all Communicator participants are using. In this presentation, we describe the features of and requirements for a genuinely useful software infrastructure for this purpose.
A hybrid self-organizing maps and particle swarm optimization approach: Research Articles
Authors: Xiang Xiao, Ernst R. Dow, Russell Eberhart, Zina Ben Miled, Robert J. Oppelt
Venue: Concurrency and Computation: Practice Experience (2004)

Gene clustering, the process of grouping related genes in the same cluster, is at the foundation of different genomic studies that aim at analyzing the function of genes. Microarray technologies have made it possible to measure gene expression levels for thousands of genes simultaneously. For knowledge to be extracted from the datasets generated by these technologies, the datasets have to be presented to a scientist in a meaningful way. Gene clustering methods serve this purpose. In this paper, a hybrid clustering approach that is based on self-organizing maps and particle swarm optimization is proposed. In the proposed algorithm, the rate of convergence is improved by adding a conscience factor to the self-organizing maps algorithm. The robustness of the result is measured by using a resampling technique. The algorithm is implemented on a cluster of workstations. Copyright &copy; 2004 John Wiley & Sons, Ltd.
A Framework for Quality of Service in Wireless Networks
Authors: Jasminder Grewal, John M. DeDourek
Venue: Proceedings of the 3rd Annual Communication Networks and Services Research Conference (2005)

The measurement and provision of QoS (Quality of Service) has increased in importance with the advent of real time streaming of multimedia applications. With wireless devices such as laptops, personal digital assistants and palmtops becoming more popular the onus lies in the transmission of multimedia streams over a wireless medium. This paper investigates the design of a testbed for evaluation of QoS in a network that includes a wireless link. Wireless network measurement techniques used for the research are discussed first followed by the issues arising as a result of using those techniques. The testbed setup that avoids the measurement issues and that can be used for carrying out wireless network measurement is described next. The final stage of the research concerns with a strategy that can be used for providing QoS over the previously discussed testbed. The tools used for implementing the strategies are discussed next.
Constructive memory for situated design agents
Authors: John S. Gero
Venue: Artificial Intelligence for Engineering Design, Analysis and Manufacturing (2004)

Design is situated. &ldquo;Situatedness&rdquo; in designing entails the explicit consideration of the state of the environment, the knowledge and experiences of the designer, and the interactions between the designer and the environment during designing. Central to the notion of situatedness is the notion of design situation and constructive memory. A design situation models a particular state of interaction between a design agent and the environment at a particular point in time. Memory construction occurs whenever a design agent uses past experiences and knowledge within the current design environment in a situated manner. This paper is concerned with the development of an agent-based computational design tool that takes into consideration the notion of situatedness in designing. A key element of this tool is a constructive memory system that supports the dynamic nature of designing. Memories of past experiences are constructed as required by the current situation, and past experiences are refined for future utility according to the current interactions between the agent and the environment. This latter case of knowledge improvement is illustrated through a series of experiments that demonstrates the effect of grounding on the operating modes and responses of a constructive memory system.
Chairs' Column
Authors: Austin Henderson, Peter Polson
Venue: ACM SIGCHI Bulletin (1992)

This column discusses Austin Henderson's recent travels, INTERCHI '93, and a selection of topics covered at the Extended Executive Committee Meeting held in Boston in December. Austin Henderson's travels this fall and early winter have taken him around the world to Japan, Russia, and the Netherlands. Later he returned to Amsterdam for an INTERCHI '93 planning meeting. The following is his description of these trips.
The geo-information environment for taking ecologically sound decisions on natural resources management
Authors: E. N. Cheremissina, L. E. Chesallov, O. V. Mitrakova
Venue: Mathematics and Computers in Simulation (2004)

The basic scientific principles and technique of integration of the multilevel diverse information are developed on the basis of model of statement and the decision of natural-exploration problems, a concrete definition of problems of a subject domain regulating process, the description and formalization of modeling representations in terms of the initial data, a choice and realization of analytical means of the decision of a problem.
Acceptance and usability of a relational agent interface by urban older adults
Authors: Timothy W. Bickmore, Lisa Caruso, Kerri Clough-Gorr
Venue: CHI '05 extended abstracts on Human factors in computing systems (2005)

This study examines the acceptance and usability of an animated conversational agent designed to establish long-term relationships with older, mostly minority adult users living in urban neighborhoods. The agent plays the role of an exercise advisor who interacts with subjects daily for two months on a touch-screen computer installed in their homes for the study. Survey results indicate the eight subjects who completed the pilot study (aged 62-82) found the agent very easy to interact with, even though most of them had little or no previous experience using computers. Most subjects also indicated strong liking for and trust in the agent, felt that their relationship with the agent was more similar to a close friend than a stranger, and expressed a strong desire to continue working with the agent at the end of the study. These results were also confirmed through qualitative analysis of post-experiment debrief transcripts.
The finite section method and problems in frame theory
Authors: Ole Christensen, Thomas Strohmer
Venue: Journal of Approximation Theory (2005)

The finite section method is a convenient tool for approximation of the inverse of certain operators using finite-dimensional matrix techniques. In this paper we demonstrate that the method is very useful in frame theory: it leads to an efficient approximation of the inverse frame operator and also solves related computational problems in frame theory. In the case of a frame which is localized w.r.t. an orthonormal basis we are able to estimate the rate of approximation. The results are applied to the reproducing kernel frame appearing in the theory for shift-invariant spaces generated by a Riesz basis.
GridICE: a monitoring service for Grid systems
Authors: Sergio Andreozzi, Natascia De Bortoli, Sergio Fantinel, Antonia Ghiselli, Gian Luca Rubini, Gennaro Tortone, Maria Cristina Vistoli
Venue: Future Generation Computer Systems (2005)

Grid systems follow a new paradigm of distributed computing that enables the coordination of resources and services that are not subject to centralized control, can dynamically join and leave virtual pools, and are assigned to users by means of an explicit assignment functionality. The monitoring of a Grid is a multi-institutional and Virtual Organization (VO)-oriented service. It must deal with the dynamics, diversity, and geographical distribution of the resources available to Virtual Organizations, and the various levels of abstraction for modeling them. This paper presents the requirements, architecture and implementation of GridICE, a monitoring service for Grid systems. The suitability of this tool in real-life scenarios is analyzed and discussed.
The infocious web search engine: improving web searching through linguistic analysis
Authors: Alexandros Ntoulas, Gerald Chao, Junghoo Cho
Venue: Special interest tracks and posters of the 14th international conference on World Wide Web (2005)

In this paper we present the Infocious Web search engine [23]. Our goal in creating Infocious is to improve the way people find information on the Web by resolving ambiguities present in natural language text. This is achieved by performing linguistic analysis on the content of the Web pages we index, which is a departure from existing Web search engines that return results mainly based on keyword matching. This additional step of linguistic processing gives Infocious two main advantages. First, Infocious gains a deeper understanding of the content of Web pages so it can better match users' queries with indexed documents and therefore can improve relevancy of the returned results. Second, based on its linguistic processing, Infocious can organize and present the results to the user in more intuitive ways. In this paper we present the linguistic processing technologies that we incorporated in Infocious and how they are applied in helping users find information on the Web more efficiently. We discuss the various components in the architecture of Infocious and how each of them benefits from the added linguistic processing. Finally, we experimentally evaluate the performance of a component which leverages linguistic information in order to categorize Web pages.
Scaling Analysis of On-Chip Power Grid Voltage Variations in Nanometer Scale ULSI
Authors: Amir H. Ajami, Kaustav Banerjee, Massoud Pedram
Venue: Analog Integrated Circuits and Signal Processing (2005)

This paper presents a detailed scaling analysis of the power supply distribution network voltage drop in DSM technologies. The effects of chip temperature, electromigration and interconnect technology scaling (including resistivity increase of Cu interconnects due to electron surface scattering and finite barrier thickness) are taken into consideration during this analysis. It is shown that the voltage drop effect in the power/ground (P/G) distribution network increases rapidly with technology scaling, and that using well-known countermeasures such as wire-sizing and/or decoupling capacitor insertion which are typically used in the present design methodologies may be insufficient to limit the voltage fluctuations over the power grid for future technologies. It is also shown that such voltage drops on power supply lines of switching devices in a clock distribution network can introduce significant amount of skew which in turn degrades the signal integrity.
Resizing beyond widgets: object resizing techniques for immersive virtual environments
Authors: John F. Lucas, Ji-Sun Kim, Doug A. Bowman
Venue: CHI '05 extended abstracts on Human factors in computing systems (2005)

The most common technique for resizing 3D objects in virtual environments is the use of 3D widgets. However, such techniques often exhibit usability problems due to difficulties in selecting and manipulating the widgets. We have developed two novel interaction techniques for resizing objects in immersive VEs. Our two techniques, the Pointer Orientation-based Resize Technique (PORT) and the Gaze-Hand resize technique, take advantage of the user's proprioceptive sense and their spatial knowledge of the environment. We designed these techniques as an alternative to 3D widgets and performed a usability study to compare the effectiveness of all three techniques. Our results show that participants were able to perform tasks significantly faster with the two new techniques than with the existing 3D Widgets technique.
A new perspective to automatically rank scientific conferences using digital libraries
Authors: Antonis Sidiropoulos, Yannis Manolopoulos
Venue: Information Processing and Management: an International Journal (2005)

Citation analysis is performed in order to evaluate authors and scientific collections, such as journals and conference proceedings. Currently, two major systems exist that perform citation analysis: Science Citation Index (SCI) by the Institute for Scientific Information (ISI) and CiteSeer by the NEC Research Institute. The SCI, mostly a manual system up until recently, is based on the notion of the ISI Impact Factor, which has been used extensively for citation analysis purposes. On the other hand the CiteSeer system is an automatically built digital library using agents technology, also based on the notion of ISI Impact Factor. In this paper, we investigate new alternative notions besides the ISI impact factor, in order to provide a novel approach aiming at ranking scientific collections. Furthermore, we present a web-based system that has been built by extracting data from the Databases and Logic Programming (DBLP) website of the University of Trier. Our system, by using the new citation metrics, emerges as a useful tool for ranking scientific collections. In this respect, some first remarks are presented, e.g. on ranking conferences related to databases.
On Linear Codes over$${\mathbb{Z}}_{2^{s}}$$
Authors: Manish K. Gupta, Mahesh C. Bhandari, Arbind K. Lal
Venue: Designs, Codes and Cryptography (2005)

In an earlier paper the authors studied simplex codes of type ¿ and β over $${\mathbb{Z}}_4$$ and obtained some known binary linear and nonlinear codes as Gray images of these codes. In this correspondence, we study weight distributions of simplex codes of type ¿ and β over $${\mathbb{Z}}_{{2^s}}.$$ The generalized Gray map is then used to construct binary codes. The linear codes meet the Griesmer bound and a few non-linear codes are obtained that meet the Plotkin/Johnson bound. We also give the weight hierarchies of the first order Reed-Muller codes over $${\mathbb{Z}}_{2^{s}}.$$ The above codes are also shown to satisfy the chain condition.
Letters to the Editor
Venue: IEEE Internet Computing (2004)

Letter to the editor regarding "Post-Javaism," by Andrew P. Black, vol. 8, no. 1, 2004, pp. 94ý96.
Inverse Ultraspherical Filters
Authors: Celestino A. Corral
Venue: Analog Integrated Circuits and Signal Processing (2005)

The inverse ultraspherical filter is derived and its properties analyzed. It is shown that the inverse ultraspherical filter has smaller transition band than the inverse Chebyshev filter under certain circumstances while still maintaining the maximally flat passband characteristic. Filter pole and zero calculations are described and typical magnitude and delay responses generated. Nomographs of inverse ultraspherical filters are also provided for determining filter order and for possible magnitude response optimization.
Tactile Feedback Laser System with Applications to Robotic Surgery
Authors: Pete Rizun, Garnette Sutherland
Venue: Proceedings of the First Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2005)

Despite the potential advantages of lasers, their adoption by surgeons has been limited. Unlike hand tools, lasers do not provide haptic feedback. With advances in augmented reality, haptics, and surgical robotics, it may now be possible to add the sense of touch to non-contact surgical lasers. This manuscript presents our initial work towards developing such a tactile feedback laser system. Two prototypes were constructed that allow an operator to feel surfaces using only light but are not yet equipped with lasers powerful enough to cut. Based on optical distance measurements, the prototypes synthesize haptic feedback through a robotic arm held by the operator when the focal point of the laser is coincident with a real surface, giving the operator the impression of touching something solid. To the best of our knowledge, no other device has been built that provides the sense of touch with a laser.