ppxscal/embedding_network huggingface dataset:
ViSTA FlowLib - framework for interactive visualization and exploration of unsteady flows in virtual environments
Authors: M. Schirski, A. Gerndt, T. van Reimersdahl, T. Kuhlen, P. Adomeit, O. Lang, S. Pischinger, C. Bischof
Venue: Proceedings of the workshop on Virtual environments 2003 (2003)

In the past a lot of work has been invested in various aspects of an interactive visualization of CFD simulation data. This includes e.g. increasing the rendering speed and responsiveness of complex visualizations, using and enhancing multimodal user interfaces, and incorporating parallel approaches for an ef cient extraction of ow properties and their respective visual representation. Still, only few projects combine the signi cant advances in these areas. In this paper, we describe our software framework ViSTA FlowLib, which facilitates merging current research results of various related areas. This is done by connecting dedicated sub-modules with clearly defined responsibilities through appropriate interfaces, whilst implementing sensible default behavior. ViSTA FlowLib combines efficient rendering techniques and a parallel computation of the visualization with intuitive multimodal user interfaces to allow for an interactive exploration of unsteady fluid flows in a virtual environment. Special care has been taken to achieve a high scalability in respect to computing power, projection technology, and input-output device availability.
A Process Model of Capability Development: Lessons from the Electronic Commerce Strategy at Bolsa de Valores de Guayaquil
Authors: Ramiro Montealegre
Venue: Organization Science (2002)

Past literature using the resource-based view of the firm has concentrated on attributes of firms' capabilities and on strategies for exploiting existing firm-specific assets. Comparatively little research has been conducted on how a firm develops, manages, and deploys capabilities to support its business strategy. This study seeks to understand the process of capability development and to establish a model that has both theoretical and practical significance. A longitudinal case study of the electronic commerce strategy formation and implementation at Bolsa de Valores de Guayaquil, an Ecuadorian stock exchange, yielded qualitative data that allowed inductive modeling of the capability development process. The model reveals that capability development in support of a new strategy is a gradual process that is cumulative, expansive, and very dependent on the way that difficult-to-imitate resources and actions are combined. At Bolsa de Valores de Guayaquil, actions that supported the development of the firm's capability to strategize seem to have contributed the most in the initial phase of the strategy formation and implementation; actions that helped the development of the firm's capability to be flexible appear to have contributed the most during the middle phase; and actions that supported the development of the firm's capabilities to integrate and engender trust seem to have contributed the most in the final phase. In addition, the key resources that supported the overall capabilities development process included leadership, organizational culture, information technology, long-term view, and social networks. Implications of this model for both research and practice are discussed.
The Assignment Problem with Seniority and Job Priority Constraints
Authors: Gaetan Caron, Pierri Hansen, Brigitte Jaumard
Venue: Operations Research (1999)

Consider an assignment problem in which persons are qualified for some but usually not all of the jobs. Moreover, assume persons belong to given seniority classes and jobs have given priority levels. Seniority constraints impose that the solution be such that no unassigned person can be given a job unless an assigned person with the same or higher seniority becomes unassigned. Priority constraints specify that the solution must be such that no unassigned job can become assigned without a job with the same or higher priority becoming unassigned. It is shown that: (i) adding such constraints does not reduce and may even increase the number of assigned persons in the optimal solution; (ii) using a greedy heuristic for constrained assignment (as often done in practice) may reduce the number of assigned persons by half, and (iii) an optimal solution to the assignment problem with both types of constraints can be obtained by solving a classical assignment problem with adequately modified coefficients.
Design of multi-tasking coprocessor control for Eclipse
Authors: Martijn J. Rutten, Jos T. J. van Eijndhoven, Evert-Jan D. Pol
Venue: Proceedings of the tenth international symposium on Hardware/software codesign (2002)

Eclipse defines a heterogeneous multiprocessor architecture template for data-dependent stream processing. Intended as a scalable and flexible subsystem of forthcoming media-processing systems-on-a-chip, Eclipse combines application configuration flexibility with the efficiency of function-specific hardware, or coprocessors. To facilitate reuse, Eclipse separates coprocessor functionality from generic support that addresses multi-tasking, inter-task synchronization, and data transport. Five interface primitives accomplish this separation. The interface facilitates the design of coprocessors that require complex control to handle data-dependent I/O, saving/restoring task state upon task switches, and pipelined processing. This paper presents how this interface enables the design of such reusable yet cost-effective coprocessors.
Experimental Analysis of a Gossip-Based Service for Scalable, Distributed Failure Detection and Consensus
Authors: Krishnakanth Sistla, Alan D. George, Robert W. Todd
Venue: Cluster Computing (2003)

Gossip protocols and services provide a means by which failures can be detected in large, distributed systems in an asynchronous manner without the limits associated with reliable multicasting for group communications. Extending the gossip protocol such that a system reaches consensus on detected faults can be performed via a flat structure, or it can be hierarchically distributed across cooperating layers of nodes. In this paper, the performance of gossip services employing flat and hierarchical schemes is analyzed on an experimental testbed in terms of consensus time, resource utilization and scalability. Performance associated with a hierarchically arranged gossip scheme is analyzed with varying group sizes and is shown to scale well. Resource utilization of the gossip-style failure detection and consensus service is measured in terms of network bandwidth utilization and CPU utilization. Analytical models are developed for resource utilization and performance projections are made for large system sizes.
Information storage and management in large web-based applications using XML
Authors: Manirupa Das, Pamela B. Lawhead
Venue: Journal of Computing Sciences in Colleges (2003)

The Extensible Markup Language [XML], was intended to be a meta-language, when it was initially approved as a Web Standard by the World Wide Web Consortium (W3C), in February of 1998. Since then, it has come a very long way in applicability and popularity and is fast becoming the Standard for Data Interchange over the Web. XML has now formed the foundation for a completely new way of communicating across the Internet. The power of XML to be applied universally to a number of areas lies in the fact that it is a clean standard and provides a very simple way for a document to carry information about itself. In a generic sense, this would imply that XML infuses the information itself with "Intelligence." This feature of XML can be harnessed to lend the flexibility and the information storage and management capability desirable in most Web-based applications. This paper researches and evaluates the tradeoffs, advantages and issues involved in applying XML to the storage and management of data and/or documents in the implementation of a large Web - based application, such as an Online Delivery System for Courseware.
Industry Clockspeed: Measurement and Operational Implications
Authors: Haim Mendelson, Ravindran R. Pillai
Venue: Manufacturing Service Operations Management (1999)

We argue that industries and industry segments are characterized by a clockspeed that gauges the velocity of change in the external business environment and sets the pace of their firms' internal operations. Using data from the electronics industry, we develop and validate an integrated metric for clockspeed that takes into account both demand- and supply-side factors. We show that after controlling for product complexity and other factors, higher industry clockspeed is associated with faster execution in product development and manufacturing (e.g., shorter development time, quicker stabilization of production) and more frequent changes in organizational structure. Our findings on the effects of clockspeed can help researchers studying other industries, and our results provide benchmarks against which practitioners can compare and classify their own organizations.
Promoting team interaction in the online classroom
Authors: Cynthia M. Calongne
Venue: Journal of Computing Sciences in Colleges (2002)

Team products tend to be of higher quality than those produced by individual efforts. Classes on campus take advantage of this phenomenon, teaching software engineering students how to produce software deliverables and products while working in teams. Online software engineering classes also require team projects, but they can be plagued with problems. While it is important to teach online students how to work in teams during the planning, design, and development of software products, many students dislike team projects when there is no face-to-face interaction. This paper discusses the issues associated with online teams and recommends some solutions for building positive team experiences in the online classroom. The topics include student fears, pedagogical concerns, asynchronous learning, effective communication, responsiveness, and teamformation.
Factors influencing the adoption of mobile gaming services
Authors: Mirella Kleijnen, Ko de Ruyter, Martin G. M. Wetzels
Venue: Mobile commerce: technology, theory, and applications (2003)

The current chapter focuses the adoption process of mobile gaming. After providing a brief introduction to the topic of re-commerce and m-services, several relevant adoption factors are highlighted. These factors have been researched empirically, via a conjoint study conducted in the Netherlands. The results illustrated a hierarchical importance of the factors identified, whereby perceived risk, complexity, and compatibility were identified as the three main regarded as the factors that are mainly influencing the adoption of mobile gaming applications. Based on these findings, we have provided several managerial implications.
Indication of a stability loss in the continuation of invariant subspaces
Authors: Ondřej Liberda, Vladimír Janovský
Venue: Mathematics and Computers in Simulation (2003)

The stability analysis is considered in the context of the pathfollowing of steady states. The aim is to continue invariant subspaces (IS) of the relevant linearized states such that they would contain all unstable and central modes. The direct predictor-corrector algorithm for continuation of IS (CIS) of a fixed dimension may fail to follow the rightmost modes. The remedy is seen in a combination of CIS with subspace iterations preconditioned by a projected Cayley transform.
Functional-join processing
Authors: R. Braumandl, J. Claussen, A. Kemper, D. Kossmann
Venue: The VLDB Journal &mdash; The International Journal on Very Large Data Bases (2000)

Inter-object references are one of the key concepts of object-relational and object-oriented database systems. In this work, we investigate alternative techniques to implement inter-object references and make the best use of them in query processing, i.e., in evaluating functional joins. We will give a comprehensive overview and performance evaluation of all known techniques for simple (single-valued) as well as multi-valued functional joins. Furthermore, we will describe special order-preserving\/ functional-join techniques that are particularly attractive for decision support queries that require ordered results. While most of the presentation of this paper is focused on object-relational and object-oriented database systems, some of the results can also be applied to plain relational databases because index nested-loop joins\/ along key/foreign-key relationships, as they are frequently found in relational databases, are just one particular way to execute a functional join.
Test-model based hierarchical DFT synthesis
Authors: Sanjay Ramnath, Frederic Neuveux, Mokhtar Hirech, Felix Ng
Venue: Proceedings of the 2002 IEEE/ACM international conference on Computer-aided design (2002)

With increasing design sizes and adoption of System on a Chip (SoC) methodology, design synthesis and test automation tools are hitting capacity and performance bottlenecks. Currently, hierarchical synthesis flows for large designs lack complete designfor-test (DFT) support. With this paper, we address a solution, involving the introduction of test models in a traditional DFT synthesis flow, that we term Hierarchical DFT Synthesis (HDS). We discuss the use of Core Test Language (CTL) based test models combined with physical and timing models to provide a complete flow for chip-level DFT. In doing so we address some challenges the new flow presents such as Design Rule Checking (DRC), DFT architecting and optimization. We describe methods to overcome these challenges thereby presenting a new methodology to handle complex next generation designs.
The effects of structural cues from multiple metaphors on computer users' information search performance
Authors: Yu-chen Hsu, Thomas M. Schwen
Venue: International Journal of Human-Computer Studies (2003)

Since the 1980s metaphors have been used to design computer interfaces in order to facilitate user learning. As computer systems become more complex, the issue of using a large number of metaphors of narrow scope to design interfaces has arisen. Several researchers have proposed the use of multiple metaphors in the design of computer systems. This study set out to compare the effects of structural cues derived from single versus multiple metaphors used in designing hypertext systems. A total of 54 undergraduate students were asked to perform selected information search tasks. The results show that the provision of metaphorical cues helped subjects to find a greater number of accurate answers in a shorter period of time. The more complete mapping between the base and target domains in the design of the interface, along with cues from multiple metaphors, may have helped subjects to develop more sophisticated representations of the hypertext structure.
Energy Modeling for Policy Studies
Authors: William W. Hogan
Venue: Operations Research (2002)

Energy policy modeling owes a great debt to the disciplines of operations research. Valuable modeling tools were available when the energy crisis struck unexpectedly. In turn, the immediate response to problem-driven policy modeling produced methodological challenges and innovations that have application outside the domain of energy. The early days of the explosive growth of energy modeling for policy studies provide illustrations of the interaction of problem identification, model formulation, problem analysis, and policy implementation in the tradition of operations research.
An Efficient, Objective Technique for Selecting An All-Star Team
Authors: Hasan Pirkul, David A. Schilling, W. J. Hurley
Venue: Interfaces (1998)

Up to 1995, all-star selection in the Ontario-Quebec Intercollegiate Football Conference was accomplished with a head coaches' meeting that took up most of the Sunday before the conference semifinal play-off games. There were two difficulties with this system. First, coaches involved in the play-off games the next Saturday lost a day of game planning. Second, there were assistant coaches who felt this "horse-trading" session was not very objective. The implementation of a Borda voting scheme solves both these problems.
On the solution sets of particular classes of linear interval systems
Authors: Götz Alefeld, Vladik Kreinovich, Günter Mayer
Venue: Journal of Computational and Applied Mathematics (2003)

We characterize the solution set S of real linear system Ax = b by a set of inequalities if b lies between some given bounds b, b and if the n × n coefficient matrix A varies similarly between two bounds A and A. In addition, we restrict A to a particular class of matrices, for instance the class of the symmetric, the skew-symmetric, the persymmetric, the Toeplitz, and the Hankel matrices, respectively. In this way, we generalize the famous Oettli-Prager criterion (Numer. Math. 6 (1964) 405), results by Hartfiel (Numer. Math. 35 (1980) 355) and the contents of the papers (in: R.B. Kearfott, V. Kreinovich (Eds.), Applications of Interval Computations, Kluwer, Boston, MA, 1996, pp. 61-79) and (SIAM J. Matrix Anal. Appl. 18 (1997) 693).
Advanced disinfection and health-care aspects of wastewater reclamation and reuse in agriculture in Mediterranean regions
Authors: L. Liberti, M. Notarnicola
Venue: Development and application of computer techniques to environmental studies (2002)

In order to address water pollution and conservation in Mediterranean basin the Polytechnic University of Bari led a 3-year joint research project focused on technical and health care aspects of wastewater reuse in agriculture funded by the European Commission. This paper summarizes activities performed and main conclusions and recommendations drawn on the basis of experimental results.
Detection of constrictions on closed polyhedral surfaces
Authors: F. Hétroy, D. Attali
Venue: Proceedings of the symposium on Data visualisation 2003 (2003)

We define constrictions on a surface as simple closed geodesic curves, i.e. curves whose length is locally minimal. They can be of great interests in order to cut the surface in smaller parts. In this paper, we present a method to detect constrictions on closed triangulated surfaces. Our algorithm is based on a progressive approach. First, the surface is simplified by repeated edge collapses. The simplification continues until we detect an edge whose collapse would change the topology of the surface. It happens when three edges of the surface form a triangle that does not belong to the surface. The three edges define what we call a seed curve and are used to initialize the search of a constriction. Secondly, the constriction is progressively constructed by incrementally refining the simplified surface until the initial surface is retrieved. At each step of this refinement process, the constriction is updated. Some experimental results are provided.
On the pseudo-Smarandache square free function
Authors: Maohua Le
Venue: Smarandache Notions Journal (2002)

In this paper we discuss various problems and conjectures concered the pseudo-Smarandache squarefree function.
Tolerance evaluation of minimum zone straightness using non-linear programming techniques: a spreadsheet approach
Authors: Mu-Chen Chen, Shu-Kai S. Fan
Venue: Computers and Industrial Engineering (2002)

In general, non-linear optimization programs are formulated to evaluate the minimum zone straightness. This paper presents a spreadsheet approach that can be applied to determine the straightness errors of discrete data sampled from a continuous shape. The developed approach is easy to implement, and can obtain the minimum zone straightness based on the international standard, ANSI Y14.5M standard on geometric dimensioning and tolerancing. The primary goal of this spreadsheet implementation attempts to help reduce the possibility of making erroneous inspection decision, and then to precisely reflect the effect of inspection as early as possible for the purpose of quality control. An experimental study is conducted on examples taken from the literature and simulation data sets. Comparisons of the proposed approach against the existing methods in the previous studies are reported. Furthermore, the approach is demonstrated to be a viable tool for straightness verification in terms of the simulation data sets in which the theoretical straightness errors are known as a priori.
The Role of Trust in Organizational Settings
Authors: Kurt T. Dirks, Donald L. Ferrin
Venue: Organization Science (2001)

Numerous researchers from various disciplines seem to agree that trust has a number of important benefits for organizations, although they have not necessarily come to agreement on how these benefits occur. In this article, we explore two fundamentally different models that describe how trust might have positive effects on attitudes, perceptions, behaviors, and performance outcomes within organizational settings. In the first section of the article, we examine the model that has dominated the literature: Trust results in direct (main) effects on a variety of outcomes. In the second section of the article we develop an alternative model: Trust facilitates or hinders (i.e., moderates) the effects of other determinants on attitudinal, perceptual, behavioral and performance outcomes via two distinct perceptual processes. Lastly, we discuss the conditions under which each of the models is most likely to be applicable. The theory is supplemented with a review of empirical studies spanning 40 years regarding the consequences of trust in organizational settings. The theoretical framework presented in this article provides insight into the processes through which trust affects organizational outcomes, provides guidance to researchers for more accurately assessing the impact of trust, provides a framework for better understanding past research on the consequences of trust, and suggests ways that organizational settings can be modified to capitalize on high levels of trust or mitigate the effects of low levels of trust.
Detecting dynamic occlusion in front of static backgrounds for AR scenes
Authors: Jan Fischer, Holger Regenbrecht, Gregory Baratoff
Venue: Proceedings of the workshop on Virtual environments 2003 (2003)

Correctly finding and handling occlusion between virtual and real objects in an Augmented Reality scene is essential for achieving visual realism. Here, we present an approach for detecting occlusion of virtual parts of the scene by natural occluders. Our algorithm is based on a graphical model of static backgrounds in the natural surroundings, which has to be acquired beforehand. The design of the approach aims at providing real-time performance and an easy integration into existing AR systems. No assumptions about the shape or color of occluding objects are required. The algorithm has been tested with several graphical models.
The role of voice quality in communicating emotion, mood and attitude
Authors: Christer Gobl, Ailbhe Ní Chasaide
Venue: Speech Communication (2003)

This paper explores the role of voice quality in the communication of emotions, moods and attitudes. Listeners' reactions to an utterance synthesised with seven different voice qualities were elicited in terms of pairs of opposing affective attributes. The voice qualities included harsh voice, tense voice, modal voice, breathy voice, whispery voice, creaky voice and lax-creaky voice. These were synthesised using a formant synthesiser, and the voice source parameter settings were guided by prior analytic studies as well as auditory judgements. Results offer support for some past observations on the association of voice quality and affect, and suggest a number of refinements in some cases. Listeners' ratings further suggest that these qualities are considerably more effective in signalling milder affective states than the strong emotions. It is clear that there is no one-to-one mapping between voice quality and affect: rather a given quality tends to be associated with a cluster of affective attributes.