ppxscal/embedding_network huggingface dataset:
Development of a MLE by students for students using extreme programming techniques
Authors: Jonathan Holloway, Mark Ratcliffe
Venue: Proceedings of the 8th annual conference on Innovation and technology in computer science education (2003)

This paper describes the approach taken to develop Tweek; a student centered learning environment; an environment that supports learning in the real sense of the word.
A view of computer music from New Zealand: Auckland, Waikato and the Asia/Pacific connection
Authors: William Dart, John Elmsly, Ian Whalley
Venue: Organised Sound (2001)

Dealing predominantly with &lsquo;art music&rsquo; aspects of electroacoustic music practice, this paper looks at cultural, aesthetic, environmental and technical influences on current and emerging practices from the upper half of the North Island of New Zealand. It also discusses the influences of Asian and Pacific cultures on the idiom locally. Rather than dwell on the similarities with current international styles, the focus is largely on some of the differences.
A method of fundamental solutions for modeling porous media advective fluid flow
Authors: J. M. Guevara-Jordan, S. Rojas
Venue: Applied Numerical Mathematics (2003)

A new numerical scheme for modeling advective tracer flow in oil reservoirs and aquifers is presented. It combines the method of fundamental solutions and a streamline time of flight approach for solving the pressure and concentration equations respectively. Computational results on a variety of two-dimensional problems and validation tests show that the new scheme is free of numerical diffusion, eliminates time step stability restrictions, and is faster than standard boundary element techniques.
Streamball techniques for flow visualization
Authors: Manfred Brill, Hans Hagen, Hans-Christian Rodrian, Wladimir Djatschin, Stanislav V. Klimenko
Venue: Proceedings of the conference on Visualization '94 (1994)

We introduce the concept of streamballs for flow visualization. Streamballs are based upon implicit surface generation techniques adopted from the well-known metaballs. Their property to split or merge automatically in areas of significant divergence or convergence makes them an ideal tool for the visualization of arbitrary complex flow fields. Using convolution surfaces generated by continuous skeletons for streamball construction offers the possibility to visualize even tensor fields.
Analysis and simulation for a system of chemical reaction equations with a vortex formulation
Authors: A. U. Zavaleta C, A. L. de Bortoli, M. Thompson
Venue: Applied Numerical Mathematics (2003)

This work presents analytical and numerical results for the two dimensional molecular mixing and chemical reaction processes using a vortex formulation. The particular model studied here is the single-step, irreversible, exothermic Arrhenius type reaction cA + cB → cP, in an incompressible fluid under Neumann boundary conditions. We establish the existence of a unique classical solution considering the weak coupling of the reactants via advection by a independently developing velocity, and we prove the existence and uniqueness of the solution via a semigroup formulation and the maximum principle. For the numerical solution a second order accurate spatial finite difference scheme is used with a second order accurate Runge-Kutta method for the time step. The behaviour of the concentrations cA and cB, the temperature, the reaction rate, and product concentration cP, are obtained over a wide range of Reynolds and Damköhler numbers.
Segmentation problems
Authors: Jon Kleinberg, Christos Papadimitriou, Prabhakar Raghavan
Venue: Journal of the ACM (JACM) (2004)

We study a novel genre of optimization problems, which we call segmentation problems, motivated in part by certain aspects of clustering and data mining. For any classical optimization problem, the corresponding segmentation problem seeks to partition a set of cost vectors into several segments, so that the overall cost is optimized. We focus on two natural and interesting (but MAXSNP-complete) problems in this class, the hypercube segmentation problem and the catalog segmentation problem, and present approximation algorithms for them. We also present a general greedy scheme, which can be specialized to approximate any segmentation problem.
Non-linear finite element analysis of flexible pavements
Authors: Muhammad N. S. Hadi, B. C. Bodhinayake
Venue: Advances in Engineering Software (2003)

A research study is being undertaken to incorporate the realistic material properties of the pavement layers and the moving traffic load, in the analysis of flexible pavements, using the finite element theory. As a preliminary step taken herein in this direction, a pavement structure where field measurements have been carried out when subjected to a cyclic loading, is selected and modelled as a finite element model. The analysis is being carried out using the finite element computer package ABAQUS/STANDARD, when this pavement model is subjected to static and cyclic loading while considering the linear and non-linear material properties of the pavement layers. The results indicate that displacements under cyclic loading when non-linear materials are present, are the closest to field measured deflections.
Applying heuristics to perform a rigorous accessibility inspection in a commercial context
Authors: Claire Paddison, Paul Englefield
Venue: Issue 73-74 (June-September 2002) (2002)

Accessibility heuristics have been developed to compliment the accessibility guidelines. The use of Web accessibility heuristics in heuristic evaluations can ensure that a greater range of special needs will be considered, from visual to cognitive impairments. Key advantages of heuristics are conciseness, memorablity, meaningfulness and insight. The heuristics can be used effectively to understand which areas of a site have accessibility issues and can provide useful insight into how to create a solution. However, the heuristics will not tell evaluators whether a Web site conforms to legislation. Studies have confirmed the common belief that heuristics should not replace knowledge but act to cue the deeper body of knowledge defined by the guidelines; it is essential that evaluators be given accessibility education before completing a heuristic evaluation using the accessibility heuristics.
A hybrid AI approach for nurse rostering problem
Authors: Haibing Li, Andrew Lim, Brian Rodrigues
Venue: Proceedings of the 2003 ACM symposium on Applied computing (2003)

This paper presents a hybrid AI approach for a class of overconstrained Nurse Rostering Problems. Our approach comes in two phases. The first phase solves a relaxed version of problem which only includes hard rules and part of nurses' requests for shifts. This involves using a forward checking algorithm with non-binary constraint propagation, variable ordering, random value ordering and compulsory backjumping. In the second phase, adjustments with descend local search and tabu search are applied to improved the solution. This is to satisfy the preference rules as far as possible. Experiments show that our approach is able to solve this class of problems well.
Towards tangibility in gameplay: building a tangible affective interface for a computer game
Authors: Ana Paiva, Rui Prada, Ricardo Chaves, Marco Vala, Adrian Bullock, Gerd Andersson, Kristina Höök
Venue: Proceedings of the 5th international conference on Multimodal interfaces (2003)

In this paper we describe a way of controlling the emotional states of a synthetic character in a game (FantasyA) through a tangible interface named SenToy. SenToy is a doll with sensors in the arms, legs and body, allowing the user to influence the emotions of her character in the game. The user performs gestures and movements with SenToy, which are picked up by the sensors and interpreted according to a scheme found through an initial Wizard of Oz study. Different gestures are used to express each of the following emotions: anger, fear, happiness, surprise, sadness and gloating. Depending upon the expressed emotion, the synthetic character in FantasyA will, in turn, perform different actions. The evaluation of SenToy acting as the interface to the computer game FantasyA has shown that users were able to express most of the desired emotions to influence the synthetic characters, and that overall, players, especially children, really liked the doll as an interface.
An XACML-based Policy Management and Authorization Service for Globus Resources
Authors: Markus Lorch, Dennis Kafura, Sumit Shah
Venue: Proceedings of the 4th International Workshop on Grid Computing (2003)

In this paper we describe our approach to a policymanagement system and a policy enforcement pointwhich is integrated into the Globus Toolkit middleware.Our system enables the specification and modification ofresource policies by administrative parties through agraphical user interface and the secure association withand transport of these policies to the policy decisioncomponents.
Performance Analysis of Inter Cluster Communication Methods in VLIW Architecture
Authors: Sourabh Saluja, Anshul Kumar
Venue: Proceedings of the 17th International Conference on VLSI Design (2004)

With increasing demands for high performance byembedded systems, especially by digital signal processingapplications, embedded processors must increaseavailable instruction level parallelism (ILP) withinsignificant constraints on power consumption and chipcost. Clustered VLIW (Very Long Instruction Word)architectures can be used to address this problem. Theirclusters have to communicate by some mechanism toensure that the data in one cluster can be used by otherclusters as and when required. We selected four differentmechanisms of inter cluster communication under thecategory of fully connected deadlock free networks. Thenwe designed and implemented the VLIW processorsemploying these mechanisms and analyzed them againstvarious performance parameters - cycle time, cycle countoverhead, instruction size and gate count. Also the effectsof changing the data width and number of registers in aregister file are analyzed.
SmartTouch: Electric Skin to Touch the Untouchable
Authors: Hiroyuki Kajimoto, Naoki Kawakami, Susumu Tachi, Masahiko Inami
Venue: IEEE Computer Graphics and Applications (2004)

Augmented haptics lets users touch surface information of any modality. SmartTouch uses optical sensors to gather information and electrical stimulation to translate it into tactile display.
Thickness scaling issues of Ni silicide
Authors: O. Chamirian, J. A. Kittl, A. Lauwers, O. Richard, M. van Dal, K. Maex
Venue: Microelectronic Engineering (2003)

Ni silicidation processes without a capping layer and with a TiN capping layer are studied from the point of view of process window, morphology of the resulting silicide, and mechanisms of degradation at higher temperatures. The thermal stability of NiSi films on As- and on B-doped (100) Si substrates was investigated for Ni film thicknesses ranging from 5 to 30 nm. While agglomeration was the mechanism of degradation for the thin films, both morphological changes and transformation to NiSi2 were possible for thicker films depending on anneal temperature and time. Activation energy of ∼2.5 eV for NiSi on n+ (100) Si and p+ (100) Si was determined for the process of morphological degradation. The measured temperature and time dependences for the thermal degradation of NiSi films suggest that the activation energy for transformation to NiSi2 is higher than for morphological degradation.
An architecture for synthesis of testable finite state machines
Authors: Vishwani D. Agrawal, Kwang-Ting Cheng
Venue: Proceedings of the conference on European design automation (1990)

We present a hardware architecture for synthesizing finite state machines (FSM). This architecture is defined at the level of the state transition graph. It contains a test machine with the same number of state variables as the object machine to be synthesized. The state graph of the test machine is so defined that each state is uniquely set and observed by input sequence no longer than [logkn], where n is the number of states and the integer k is a design parameter. The state transition graph of the test machine is superposed on the given state graph of the object function. The logic implementation steps, namely, state assignment, minimization and technology mapping are carried out for the combined graph. By design, the embedded test machine is fully testable. Also, since the test machine can control all memory elements, the circuit is effectively tested by a combinational circuit test generator. Scan register is shown to be a special case of the presented methodology.
A modified dual-priority scheduling algorithm for hard real-time systems to improve energy savings
Authors: M. Angels Moncusí, Alex Arenas, Jesus Labarta
Venue: Compilers and operating systems for low power (2003)

We present a modification of the dual-priority scheduling algorithm for hard real-time systems that takes advantage of its performance to efficiently improve energy saving. The approach exploits the priority scheme to lengthen the runtime of tasks by reducing the speed of the processor and the voltage supply, thereby saving energy by spreading execution cycles up to the maximal time constraints allowed. We show by simulation that our approach improves the energy saving obtained with a pre-emptive fixed-priority scheduling scheme.
Extracting Knowledge from Association Relationships to Build Navigational Models
Authors: Manoli Albert, Vicente Pelechano, Joan Fons, Gonzalo Rojas, Oscar Pastor
Venue: Proceedings of the First Conference on Latin American Web Congress (2003)

This paper analyzes how the semantics of association relationships in OO conceptual modeling can help to build Navigational Models for Web Applications. The work has been developed in the context of OOWS (a Model-Driven Development Method for building Web Applications). We study some structural and behavioral properties of those conceptual abstractions in order to extract knowledge to be applied in the construction of navigational models. From this study, a set of design rules has been obtained. These rules help the modeler to build navigational models in a systematic way. The results of this work have improved the modeling and code generation processes introduced by OOWS.
LAST: a Layout Area and Shape function esTimator for high level applications
Authors: Fadi J. Kurdahi, Champaka Ramachandran
Venue: Proceedings of the conference on European design automation (1991)

We address the problem of area prediction of VLSI layouts. We present an approach based on two models, analytical and constructive. A circuit design is recursively partitioned down to a level specified by the user, thus generating a slicing tree. An analytical model is then used to predict the shape functions of the leaf subcircuits. By traversing the tree bottom up the shape function of the entire layout design can then be constructively predicted. This approach permits the user to trade off the accuracy of the prediction versus the runtime of the predictor. Such a scheme is quite useful for high-level synthesis and system level partitioning. The experimental validation results are quite good, indicating an average error of the order of 5% in predicting shape functions for Standard Cell benchmark designs with sizes ranging from 125 to 12,000 cells.
University esl instructors' perceptions and use of computer technology in teaching
Authors: Richard Speaker
Venue:  (2003)

This interpretive qualitative study examined university ESL instructors' experiences using technologies and their personal views of technology integration. The study also explored the factors that affected these instructors' decisions for using computer and other technologies in their teaching. The informants in the study were five ESL instructors from five different institutions of higher learning in the southern state. The qualitative data were collected mainly through interviews along with self-report surveys and document materials. Overall positive statements were found in the instructors' experience and perception of their technology use in teaching. Nevertheless, it appears that these instructors' computer use is very minimal and their beliefs and perceptions of technology use are impacted by their experience of using technologies. Eight influential factors are identified from the emerged themes in affecting these instructors' technology decisions. The factors include: perceived benefits or value; anxiety; personal style; machines and language teaching; environment; peer influence; teaching style; and time. The findings in this study also indicate that instructors' demographic information has no influence on their perceptions and use of technology despite whether or not they use computers in instruction and how they use them.
Preservation of digital publications: an OAIS extension and implementation
Authors: Peter Rödig, Uwe M. Borghoff, Jan Scheffczyk, Lothar Schmitz
Venue: Proceedings of the 2003 ACM symposium on Document engineering (2003)

Over the last decades, the amount of digital documents has increased exponentially. Nevertheless, traditional document engineering methods are applied. Even worse, the long-term preservation issues have been neglected in standard document life cycle implementations.Our digital (cultural) heritage is, therefore, highly endangered by the silent obsolescence of data formats, software and hardware. Severe losses of information already happened. It is high time to implement concrete solutions.Fortunately numerous institutions already target these issues. Moreover, with the OAIS reference model1 a rich standardized conceptual framework is available, which already serves as implementation basis.2This paper discusses an extension to the OAIS reference model and illustrates a prototype implementation of a document life cycle that is enriched by functions for long-term preservation.More precisely, this paper aims to provide first solutions to the following three problem areas:<ol>1. Detachment: OAIS defines no functions for the process of detaching digital documents prior to the ingest function. This detachment function is modeled in great detail and implemented for the provision of the so-called OAIS's submission information packages (SIP).2. DBMS: OAIS defines a very complex functionality. We show how a standard database management system (DBMS) can support a wide variety of required functionalities in an integrated and homogenous way. Among others OAIS's data management, archival storage, and access are supported.3. Metadata: So far, OAIS does not cover any aspects of the metadata generation. Here, we briefly discuss the (semi-)automatic generation of a metadata set.</ol>In order to evaluate the feasibility of our approach, we built a first prototype. We carried out our experiments in close cooperation with the Bavarian State Library, Munich, which is engaged in numerous international initiatives dealing with the problem of long-term preservation. Our University Library also supported us by delivering a representative test set of digital publications.3We conclude our paper by presenting some lessons learned from our conceptual work and from our real world experiments.
An ontology for linguistics on the semantic web
Authors: Scott Owen Farrar
Venue:  (2003)

The current research presents an ontology for linguistics useful for an implementation on the Semantic Web. By adhering to this model, it is shown that data of the kind routinely collected by field linguists may be represented so as to facilitate automatic analysis and semantic search. The literature concerning typological databases, knowledge engineering, and the Semantic Web is reviewed. It is argued that the time is right for the integration of these three areas of research. Linguistic knowledge is discussed in the overall context of common-sense knowledge representation. A three-layer approach to meaning is assumed, one that includes conceptual, semantic, and linguistic levels of knowledge. In particular the level of semantics is shown to be crucial for a notional account of grammatical categories such as tense, aspect, and case. The level of semantic is viewed as an encoding of common-sense reality. To develop the ontology an upper model based on the Suggested Upper Merged Ontology (SUMO) is adopted, though elements from other ontologies are utilized as well. A brief comparison of available upper models is presented. It is argued that any ontology for linguistics should provide an account of at least (1) linguistic expressions, (2) mental linguistic units, (3) linguistic categories, and (4) discrete semantic units. The concepts and relations concerning these four domains are motivated as part of the ontology. Finally, an implementation for the Semantic Web is given by discussing the various data constructs necessary for markup (interlinear text, lexicons, paradigms, grammatical descriptions). It is argued that a characterization of the data constructs should not be included in the general ontology, but should be left up to the individual data provider to implement in XML Schema. A search scenario for linguistic data is discussed. It is shown that an ontology for linguistics provides the machinery for pure semantic search, that is, an advanced search framework whereby the user may use linguistic concepts, not just simple strings, as the search query.
A Multi-Channel Model of Separating Equilibrium in the Face of the Digital Divide
Authors: Frederick J. Riggins
Venue: Proceedings of the Proceedings of the 37th Annual Hawaii International Conference on System Sciences (HICSS'04) - Track 8 - Volume 8 (2004)

We develop a multi-channel model of separating equilibrium where a seller markets a durable good to high and low type consumers in two different channels -- an online Internet storefront and an offline brick-and-mortar store. We show how the digital divide, where high type consumers dominate the online channel and low type consumers dominate the offline channel, artificially segments the marketplace thereby mitigating the classic cannibalization problem. This allows the seller to more efficiently market its goods to each consumer segment. We show conditions under which low type consumers are initially served in the offline channel, but subsequently bridging the divide results in low type consumers not being served in either channel. We also examine the implications of bridging the digital divide when the seller uses delay by engaging in intertemporal price discrimination.
A framework for the development of personalized, distributed web-based configuration systems
Authors: Liliana Ardissono, Alexander Felfernig, Gerhard Friedrich, Anna Goy, Dietmar Jannach, Giovanna Petrone, Ralph Schäfer, Markus Zanker
Venue: AI Magazine (2003)

For the last two decades, configuration systems relying on AI techniques have successfully been applied in industrial environments. These systems support the configuration of complex products and services in shorter time with fewer errors and, therefore, reduce the costs of a mass-customization business model. The European Union-funded project entitled CUSTOMER-ADAPTIVE WEB INTERFACE FOR THE CONFIGURATION OF PRODUCTS AND SERVICES WITH MULTIPLE SUPPLIERS (CAWICOMS) aims at the next generation of web-based configuration applications that cope with two challenges of today's open, networked economy: (1) the support for heterogeneous user groups in an open-market environment and (2) the integration of configurable subproducts provided by specialized suppliers.This article describes the CAWICOMS WORKBENCH for the development of configuration services, offering personalized user interaction as well as distributed configuration of products and services in a supply chain. The developed tools and techniques rely on a harmonized knowledge representation and knowledge-acquisition mechanism, open XML-based protocols, and advanced personalization and distributed reasoning techniques. We exploited the workbench based on the real-world business scenario of distributed configuration of services in the domain of information processing-based virtual private networks.