ppxscal/embedding_network huggingface dataset:
Demo: a multi-modal training environment for surgeons
Authors: Shahram Payandeh, John Dill, Graham Wilson, Hui Zhang, Lilong Shi, Alan Lomax, Christine MacKenzie
Venue: Proceedings of the 5th international conference on Multimodal interfaces (2003)

This demonstration presents the current state of an on-going team project at Simon Fraser University in developing a virtual environment for helping to train surgeons in performing laparoscopic surgery. In collaboration with surgeons, an initial set of training procedures has been developed. Our goal has been to develop procedures in each of several general categories, such as basic hand-eye coordination, single-handed and bi-manual approaches and dexterous manipulation. The environment is based on an effective data structure that offers fast graphics and physically based modeling of both rigid and deformable objects. In addition, the environment supports both 3D and 5D input devices and devices generating haptic feedback. The demonstration allows users to interact with a scene using a haptic device.
Analysing the security of a non-repudiation communication protocol with mandatory proof of receipt
Authors: Tom Coffey, Puneet Saidha, Peter Burrows
Venue: Proceedings of the 1st international symposium on Information and communication technologies (2003)

Non-repudiation is a security service concerned with preventing a denial by one of the principals involved in a communication of having participated in all or part of the communication. Principals exchange evidence information, which proves their participation in the communication. The evidence is digitally signed, making it non-forgeable and undeniable.In this paper, a non-repudiation communication protocol with mandatory proof of receipt is formally analysed. The verification technique used in the analysis applies a modal logic of knowledge and belief to prove the correctness of the protocol. This involves a process of deductive reasoning, where the desired protocol goals are deduced by applying a set of axioms, theorems and inference rules to the assumptions and message exchanges of the protocol. If the protocol is shown to fulfil its goals it can be deemed to be correct and secure.
Introduction
Authors: Jakka Sairamesh, Alison Lee, Loretta Anania
Venue: Communications of the ACM (2004)

With so many of us infohabitants living and working on the Internet, we've now established urban centers there, with dwellings, commerce, social and civic services, government institutions, and lots of social interaction.
Modelling earthquake accelerograms using neural networks and linear predictors
Authors: Ian Flood, Nicolas Gagarin, Nabil Kartam
Venue: Artificial Intelligence for Engineering Design, Analysis and Manufacturing (1998)

The paper describes and evaluates three methods of modelling earthquake accelerograms using artificial neural networks and linear predictors. These are a radial-Gaussian neural networking system, a linear predictor, and a hybrid of these two. Two methods of using these models to predict ground acceleration are adopted. The first is based on a direct prediction of ground acceleration at some point in time in the future from a series of ground accelerations that occurred earlier in the earthquake event. The second is a recursive approach whereby a model predicts a sequence of future ground accelerations by feeding back its predictions to its inputs. The performances of the models are tested using the 1985 Mexico earthquake and aftershock. The linear predictor and hybrid models perform best at direct prediction while none of the models perform particularly well at recursive prediction. The paper concludes with an outline of some areas for future work.
A recursive connectionist approach for predicting disulfide connectivity in proteins
Authors: Alessandro Vullo, Paolo Frasconi
Venue: Proceedings of the 2003 ACM symposium on Applied computing (2003)

We are interested in the prediction of disulfide bridges in proteins, a structural feature that conveys important information about the protein conformation and that can therefore help towards the solution of the folding problem. We assume here that the disulfide bonding state of cysteines is known and we focus on the subsequent problem of disulfide bridges pairings assignment. In this paper, disulfide connectivity is modeled by undirected graphs. A graphspace search algorithm is employed to explore alternative disulfide bridges patterns and prediction consists of selecting the 'best' graph in the search space. The core of the proposed method is a recursive neural network architecture trained to score candidate graphs. We report experiments on previously published data showing that our algorithm outperforms the known alternative methods for most proteins. Furthermore, we assess the generalization capabilities testing the model on previously unpublished data.
Well-Defined Generalized Stochastic Petri Nets: A Net-Level Method to Specify Priorities
Authors: Enrique Teruel, Giuliana Franceschinis, Massimiliano De Pierro
Venue: IEEE Transactions on Software Engineering (2003)

Generalized Stochastic Petri Nets (GSPN), with immediate transitions, are extensively used to model concurrent systems in a wide range of application domains, particularly including software and hardware aspects of computer systems, and their interactions. These models are typically used for system specification, logical and performance analysis, or automatic code generation. In order to keep modeling separate from the analysis and to gain in efficiency and robustness of the modeling process, the complete specification of the stochastic process underlying a model should be guaranteed at the net level, without requiring the generation and exploration of the state space. In this paper, we propose a net-level method that guides the modeler in the task of defining the priorities (and weights) of immediate transitions in a GSPN model, to deal with confusion and conflict problems. The application of this method ensures well-definition without reducing modeling flexibility or expressiveness.
Point similarity measures for non-rigid registration of multi-modal data
Authors: Peter Rogelj, Stanislav Kovačič, James C. Gee
Venue: Computer Vision and Image Understanding (2003)

High-dimensional non-rigid registration of multi-modal data requires similarity measures with two important properties: multi-modality and locality. Unfortunately all commonly used multi-modal similarity measures are inherently global and cannot operate on small image regions. In this paper, we propose a new class of multi-modal similarity measures, which are constructed from information of the whole images but can be applied pointwise. Due to their capability of measuring correspondence for individual image points we call them point similarity measures. Point similarity measures can be derived from global measures and enable detailed relative comparison of local image correspondence. We present a set of multimodal point similarity measures based on joint intensity distribution and test them as an integral part of non-rigid multi-modal registration system. The comparison results show that segmentation-based measure, which models the joint distribution as a sum of intensity classes, performs best. When intensity classes do not exist or cannot be accurately modeled, each intensity pair can be treated as a separate class, which results in a more general measure, suitable for various non-rigid registration tasks.
Development and application of a 3d, fully compositional, thermal reservoir simulator
Authors: Shanqiang Luo
Venue:  (2003)

The robustness and speed of a flash-calculation algorithm is very important for compositional and compositional thermal reservoir simulation. The two-phase vapor/liquid equilibrium flash calculation algorithm is well developed, but two-phase liquid/liquid equilibrium and three-phase vapor/liquid/liquid equilibrium flash calculation algorithms are not well developed. In this study, a new and robust algorithm for water/oil/gas multiphase flash calculation is developed. Comparisons with experimental data and simulation results from commercial software validate the new algorithm. Also, the new algorithm is used to study water/hydrocarbon mutual solubility effect that is generally ignored in petroleum industry practice. It is unknown how much the water-in-oil solubility effect will influence oil recovery in steam injection processes. In this work, a 3D, fully implicit, fully compositional, thermal reservoir simulator is developed. The simulator considers water/hydrocarbon mutual solubility and is used to evaluate the effect of water-in-oil solubility on oil production in steam-injection processes. Simulation results show that effect of water-in-oil solubility increases oil recovery in both steam huff &lsquo;n&rsquo; puff and steamflooding processes. The new flash calculation algorithm is useful to both petroleum engineering and chemical engineering applications. The reservoir simulator can be widely used to study production mechanisms in steam-injection processes. Also, with some modifications, the reservoir simulator should be capable of modeling gas production from natural gas hydrates accumulations.
Physicians' and nurses' uses and stages of concern regarding a computer-based patient record system in a rural healthcare delivery system
Authors: Michelle Hagaman Barber
Venue:  (2003)

This study examined the level of adoption of a computer-based patient record (CPR) system by physicians and nurses in a rural healthcare system. At the center of the study were physician and nurse concerns regarding the CPR. The Concerns-Based Adoption Model (Hall Hord. 1987) was used as the framework for the study. The research questions focused on identifying and comparing physicians' and nurses' stages of concern regarding the CPR. The significance of variables on clinicians' concerns, CPR functions used, and concerns/barriers to CPR usage were also explored. In addition, reasons for using the CPR were assessed and compared according to clinician's ratings of importance and satisfaction within clinical practices. The 35-item Stages of Concern Questionnaire (Hall, George, Rutherford, 1986) was used to assess clinicians' concerns regarding the CPR. Eleven additional questions were used to obtain demographic and research related data. Questionnaires were sent to 170 physicians and 170 nurses associated with the healthcare system under study. All physician practices involved in the study were currently using or had expressed interest in using the CPR. One hundred fifty surveys (44%) were returned. Data analysis of the raw scores, percentile scores, and graphic representations of the profiles indicated that the clinician respondents had intense Stage 0-Awareness concerns followed by intense Stage 2-Personal concerns. Profile examinations indicated that both physicians and nurses were mostly non-users of the CPR innovation with intense Stage 0, 1, 2, and 3 concerns. No significant differences between physicians' and nurses' Stages of Concern were found. Significant relationships were found between clinician's peak stages of concern and age, practice specialty, and training time. Clinicians are using at least 15 different CPR functions in their practices. The greatest concerns/barriers to CPR use are time required for data entry and financial investment. Clinicians' reasons for using the CPR were consistently rated higher in importance over actual satisfaction. Overall, the clinician respondents in this study were in the early stages of CPR adoption. Recommendations include the verification of the SoC profiles by respondents and non-respondent users of the CPR, and the application of appropriate Stage interventions during the early stages of innovation adoption.
Active e-document framework ADF: model and tool
Authors: Hai Zhuge
Venue: Information and Management (2003)

An active document framework is a self-representable, self-explainable, and self-executable document mechanism. A document's content is reflected in four aspects: granularity hierarchy, template hierarchy, background knowledge, and semantic links between fragments. An active document has a set of build-in engines for browsing, retrieving, and reasoning, which can work in a way best suited to the document's content. Besides browsing and retrieval services, the active document supports intelligent information services such as complex question answering, online teaching, and assistant problem solving. The client side service provider is only responsible for the retrieval of the required active document. The detailed information services are provided by the document mechanism. This improves the current Web information retrieval approach by raising the efficiency of information retrieval, enhancing the preciseness and mobility of information services, and enabling intelligent information services. A tool for making semantic links in a document and an intelligent browser have been developed to support the proposed approach, which provides a new type of web information service.
Redefining the manufacturing enterprise through information technology
Authors: Qiang Tu, Wei Wang
Venue: Business strategies for information technology management (2003)

This chapter identifies the profound impact of modern information technology on the manufacturing industry. Advanced manufacturing technologies, coupled with organization-wide information systems infrastructures, have offered manufacturing firms tremendous opportunities for sustainable competitive advantages. To fully realize the new technologies' strategic benefits, however, manufacturing management must both abandon traditional industrial mindsets and redesign manufacturing systems for maximum enterprise integration. Technology is, after all, merely an enabling factor. It requires other corresponding organizational changes to reach its full potential. We, the authors, also introduce current research ideas in the areas of information technology and of manufacturing strategic management.
The WAY Ahead: Entity Rendezvous through Mobile Agents
Authors: T. D. Lowen, P. T. O'Hare, G. M. P. O'Hare
Venue: Proceedings of the Proceedings of the 37th Annual Hawaii International Conference on System Sciences (HICSS'04) - Track 9 - Volume 9 (2004)

The Where Are You (WAY) system is a simple yet effective application for assisting mobile users in the performance of a variety of routine tasks. In particular one of the most common and costly usage of mobile devices is the synchronisation and rendezvous of people. The WAY system supports the mobile citizen in the location, tracking and rendezvousing with a variety of moving entities. WAY distinguishes and differentiates itself from other context sensitive service systems through its adoption of an agent oriented approach.We attempt to provide an alternate solution to this all too familiar problem, by employing an amalgamation of numerous appropriate technologies. These include context-aware mobile computing, Geographic Information Systems (GIS), and mobile agent based technologies. System functionality is delivered through a collection of mobile lightweight intentional agents, which take cognisance of the memory and processing restrictions of Personal Digital Assistants (PDAs). Such agents provide autonomous decision making capabilities and can amongst other things make decisions as to their location within a wireless topology and where necessary activate migration.
Facial asymmetry quantification for expression invariant human identification
Authors: Yanxi Liu, Karen L. Schmidt, Jeffrey F. Cohn, Sinjini Mitra
Venue: Computer Vision and Image Understanding (2003)

We investigate facial asymmetry as a biometric under expression variation. For the first time, we have defined two types of quantified facial asymmetry measures that are easily computable from facial images and videos. Our findings show that the asymmetry measures of automatically selected facial regions capture individual differences that are relatively stable to facial expression variations. More importantly, a synergy is achieved by combining facial asymmetry information with conventional EigenFace and FisherFace methods. We have assessed the generality of these findings across two publicly available face databases: Using a random subset of 110 subjects from the FERET database, a 38% classification error reduction rate is obtained. Error reduction rates of 45-100% are achieved on 55 subjects from the Cohn-Kanade AU-Coded Facial Expression Database. These results suggest that facial asymmetry may provide complementary discriminative information to human identification methods, which has been missing in automatic human identification.
A Service Discovery: A Service Broker Approach
Authors: Teemu Koponen, Teemupekka Virtanen
Venue: Proceedings of the Proceedings of the 37th Annual Hawaii International Conference on System Sciences (HICSS'04) - Track 9 - Volume 9 (2004)

Mobile computing and pervasive computing introduce a more dynamic network environment. As a side-effect, location of services becomes problematic for clients accessing the services. A number of service discovery solutions aim to raise the abstraction level of the location to solve the problem; the trend is to discover services not based on network addresses but based on service usage intentions. Even though the current service discovery solutions (Bluetooth, Jini, Universal Plug'N'Play, Salutation, and Service Location Protocol) succeed in doing this, they have a limited support for interoperability. Nonetheless, a need for federating service discovery domains is imminent due to the nature of mobile and pervasive computing.In this paper we design a middleware broker component, service broker, which is capable of connecting service discovery solutions. We also introduce shortly the implementation of theprototype.
A distributed fair scheduling scheme in wireless LAN
Authors: Hai Tao Wu, Yu Lin, Shi Duan Cheng
Venue: Journal of Computer Science and Technology (2003)

This paper proposes an algorithm named WLFVC, which is a fully distributed wireless packet scheduling algorithm based on LFVC (Leap Forward Virtual Clock), to provide streams with fairness, especially in the short time scale. This algorithm is able to allocate bandwidth to streams proportional to their weights. Thus, better delay and jitter performance can be achieved. Since collisions and wireless link error degrade the performance of MAC protocols in the WLAN environment, WLFVC also takes them into consideration. Finally, this algorithm works in a fully distributed way and it can coexist with other stations that only support DCF (Distributed Coordination Function).
Coming soon
Authors: Newton Lee
Venue: Computers in Entertainment (CIE) (2003)

RoBallet: Creativity Can Be Hard Fun Learning by Doing and Learning through Play: An Exploration of Interactivity in Virtual Environments for Children Tools for Children to Create Physical Interactive StoryRooms A Friendly Face in Robotics: Sony's AIBO Entertainment Robot as an Educational Tool Think science! Entertainment Education in Interactive Theaters When Children Reflect on their Own Playing Style: Experiments with Continuator and and Children Edutainment: A Case Study of Interactive CD-ROM Playsets Development and Utilization of Asobiuta KARAOKE for Elementary Music Education Available on the Internet and more... The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
The role of the organizational context in the use of a workflow system: lessons from a case study
Authors: Anabela Sarmento
Venue: Computing information technology: the human side (2003)

This chapter discusses the role of the organizational context in the use of a workflow system. It argues there are organizational factors such as structure, power, people, technology and culture, that constrain and enable the use of workflow systems. The author hopes that, by presenting a case study of a Portuguese organization, which implemented and used a workflow system, it will help to identify those organizational factors, which could affect implementation, and to understand how they can influence the success, or failure, of such a system. Finally, the results will contribute to a better management of the process of change.
Domain Ontology and Galois Lattice Structure for Query Refinement
Authors: Brigitte Safar, Hassen Kefi
Venue: Proceedings of the 15th IEEE International Conference on Tools with Artificial Intelligence (2003)

We present a system for interactively querying a topical resources repository and for navigating the set of responses obtained from the repository. Our system makes use of a domain ontology for dynamically constructing a Gallois lattice. Nodes in this structure are resources clusters which are interactively examined by the user during the construction process.
Assessing and Improving TCP Rate Shaping over Edge Gateways
Authors: Huan-Yun Wei, Shih-Chiang Tsao, Ying-Dar Lin
Venue: IEEE Transactions on Computers (2004)

Abstract--Computers installed with commercial/open-source software have been widely employed as organizational edge gateways to provide policy-based network management. Such gateways include firewalls for access control, and bandwidth managers for managing the narrow Internet access links. When managing the TCP traffic, pass-through TCP flows can introduce large buffer requirements, large latency, frequent buffer overflows, and unfairness among flows competing for the same queue. So, how to allocate the bandwidth for a TCP flow without the above drawbacks becomes an important issue. This study assesses and improves TCP rate shaping algorithms to solve the above problems through self-developed implementations in Linux, testbed emulations, live Internet measurements, computer simulations, modeling, and analysis. The widely deployed TCP Rate control (TCR) approach is found to be more vulnerable to Internet packet losses and less compatible to some TCP sending operating systems. The proposed PostACK approach can preserve TCR's advantages while avoiding TCR's drawbacks. PostACK emulates per-flow queuing, but relocates the queuing of data to the queuing of ACKs in the reverse direction, hence minimizing the buffer requirement up to 96 percent. PostACK also has 10 percent goodput improvement against TCR under lossy WAN environments. A further scalable design of PostACK can scale up to 750Mbps while seamlessly cooperating with the link-sharing architecture. Experimental results can be reproduced through our open sources: 1) tcp-masq: a modified Linux kernel, 2) wan-emu: a testbed for conducting switched LAN-to-WAN or WAN-to-LAN experiments with RTT/loss/jitter emulations.
This Year in the MOVES Institute
Authors: Michael Zyda, Don Brutzman, Rudy Darken, John Hiles, Ted Lewis, Alex Mayberry, Russell Shilling, Joe Sullivan, Alex Callahan, Margaret Davis
Venue: Proceedings of the 2003 International Conference on Cyberworlds (2003)

The MOVES Institute's mission is research, application,and education in the grand challenges of modeling, virtualenvironments, and simulation. Specialties are 3D visualsimulation, networked virtual environments, computer-generatedautonomy, human-performance engineering,immersive technologies, defense /entertainmentcollaboration, and evolving operational modeling.