ppxscal/embedding_network huggingface dataset:
"edit this page": the socio-technological infrastructure of a wikipedia article
Authors: Shaun P. Slattery
Venue: Proceedings of the 27th ACM international conference on Design of communication (2009)

Networked environments, such as wikis, are commonly used to support work, including the collaborative authoring of information and "fact-building." In networked environments, the activity of fact-building is mediated not only by the technological features of the interface, but also by the social conventions of the community it supports. This paper examines the social and technological features of a Wikipedia article in order to understand how these features help mediate the activity of fact-building and highlights the need for communication designers to consider the goals and needs of the communities for which they design.
An Online Survey System on Computer Game Enjoyment and Personality
Authors: Xiaowen Fang, Susy Chan, Chitra Nair
Venue: Proceedings of the 13th International Conference on Human-Computer Interaction. Part IV: Interacting in Various Application Domains (2009)

This paper discusses the development of an online survey instrument to measure the game enjoyment and player characteristics like age, gender and personality traits. A research framework of game play is proposed based on a review of prior research on computer game enjoyment, game characteristics, personality theories, effects of computer game play, and technology acceptance model. The proposed framework suggests that an appropriate fit between characteristics of the player and gaming technology will result in greater enjoyment while social influence may moderate effects of the fit. The survey will allow the researcher to establish the fit profiles between player characteristics and game play.
Pulse arrival time and ballistocardiogram application to blood pressure variability estimation
Authors: Eduardo Pinheiro, Octavian Postolache, Pedro Girao
Venue: Proceedings of the 2009 IEEE International Workshop on Medical Measurements and Applications (2009)

This work presents a system which estimates blood pressure variability (BPV) via pulse arrival time (PAT) using two distinct methods. Three heart rate estimates are acquired from beat-to-beat time interval extraction of electrocardiogram (ECG), finger photoplethysmogram (PPG), and ballistocardiogram (BCG). Using both ECG and BCG as reference signals, PAT is computed. Since PAT variability (PATV) is correlated to blood pressure variability, the system obtains an estimation of both heart rate variability (HRV) and BPV, parameters which carry vast information to characterize physiological and pathological states. Since BCG has not been studied yet as an alternative to EGG in PAT calculations, this study focus on the correlation of these two PATV estimates.
Successful User Experience in an Agile Enterprise Environment
Authors: Melissa Federoff, Catherine Courage
Venue: Proceedings of the Symposium on Human Interface 2009 on ConferenceUniversal Access in Human-Computer Interaction. Part I: Held as Part of HCI International 2009 (2009)

Salesforce.com is a leader in the enterprise Customer Relationship Management (CRM) marketplace. In 2006, salesforce.com's Research and Development (R D) organization transitioned over 30 product teams from a waterfall development process to an agile one. The R D department is responsible for producing all products offered to salesforce.com customers. After the transition, it was clear that User Experience (UX) team members were dissatisfied. When asked 6 months into the rollout if agile was making their work life better, only 24% agreed. This paper discusses how the team and management responded to this data and as a result reached an 85% satisfaction rate a year later.
An Efficient Parallel Sorting Algorithm on Metacube Multiprocessors
Authors: Yamin Li, Shietung Peng, Wanming Chu
Venue: Proceedings of the 9th International Conference on Algorithms and Architectures for Parallel Processing (2009)

Parallel sorting algorithms in hypercubes have been studied extensively. One of the practical parallel sorting algorithms is Bitonic Sort, which is implemented in O(n 2) time for sorting N = 2 n numbers in an n-cube. A versatile family of interconnection networks alternative to hypercube, called metacube, was proposed for building extremely large scale multiprocessor systems with a small number of links per node. A metacube MC(k,m) connects $2^{2^km+k}$ nodes with only k + m links per node. In this paper, we present an efficient sorting algorithm on metacube multiprocessors. The proposed sorting algorithm is based on the Batcher's bitonic sorting algorithm. In order to perform the parallel sorting efficiently in metacube, we give a new presentation of the metacube such that the communications required by the algorithm can be done efficiently with gather and scatter operations. The parallel bitonic sort algorithm implemented in metacubes with the new presentation runs in O(2 k m + k)2 computation steps and O(2 k m(2k + 1) + k)2 communication steps.
I Like It... I Like It Not: Evaluating User Ratings Noise in Recommender Systems
Authors: Xavier Amatriain, Josep M. Pujol, Nuria Oliver
Venue: Proceedings of the 17th International Conference on User Modeling, Adaptation, and Personalization: formerly UM and AH (2009)

Recent growing interest in predicting and influencing consumer behavior has generated a parallel increase in research efforts on Recommender Systems. Many of the state-of-the-art Recommender Systems algorithms rely on obtaining user ratings in order to later predict unknown ratings. An underlying assumption in this approach is that the user ratings can be treated as ground truth of the user's taste. However, users are inconsistent in giving their feedback, thus introducing an unknown amount of noise that challenges the validity of this assumption.In this paper, we tackle the problem of analyzing and characterizing the noise in user feedback through ratings of movies. We present a user study aimed at quantifying the noise in user ratings that is due to inconsistencies. We measure RMSE values that range from 0.557 to 0.8156. We also analyze how factors such as item sorting and time of rating affect this noise.
Performance Verification of Successive Interference Cancellation for STBC MIMO-OFDM System with Channel Correlation
Authors: Jing-Jyun You, Shyue-Win Wei
Venue: Wireless Personal Communications: An International Journal (2009)

Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) transmission can improve both the transmission capacity and performance due to diversity gain. However, when the antennas are close to each other in a MIMO-OFDM system, the diversity order will be decreased because of channel correlation. In the paper performance of various detection methods for space---time block code (STBC) MIMO-OFDM with channel correlation are evaluated, including the conventional Alamouti full matrix detection, the modified diagonal matrix detection, the least square-zero forcing (LS-ZF) detection, and the successive interference cancellation (SIC). The paper also verify that the SIC detection can still keep excellent detection performance under large channel correlation.
System-theoretical algorithmic solution to waiting times in semi-Markov queues
Authors: N. Akar, K. Sohraby
Venue: Performance Evaluation (2009)

Markov renewal processes with matrix-exponential semi-Markov kernels provide a generic tool for modeling auto-correlated interarrival and service times in queueing systems. In this paper, we study the steady-state actual waiting time distribution in an infinite capacity single-server semi-Markov queue with the auto-correlation in interarrival and service times modeled by Markov renewal processes with matrix-exponential kernels. Our approach is based on the equivalence between the waiting time distribution of this semi-Markov queue and the output of a linear feedback interconnection system. The unknown parameters of the latter system need to be determined through the solution of a SDC (Spectral-Divide-and-Conquer) problem for which we propose to use the ordered Schur decomposition. This approach leads us to a completely matrix-analytical algorithm to calculate the steady-state waiting time which has a matrix-exponential distribution. Besides its unifying structure, the proposed algorithm is easy to implement and is computationally efficient and stable. We validate the effectiveness and the generality of the proposed approach through numerical examples.
Exploring Heuristic Action Selection in Agent Programming
Authors: Koen V. Hindriks, Catholijn M. Jonker, Wouter Pasman
Venue: Programming Multi-Agent Systems: 6th International Workshop, ProMAS 2008, Estoril, Portugal, May 13, 2008. Revised Invited and Selected Papers (2009)

Rational agents programmed in agent programming lan- guages derive their choice of action from their beliefs and goals. One of the main benefits of such programming languages is that they facilitate a high-level and conceptually elegant specification of agent behaviour. Qualitative concepts alone, however, are not sufficient to specify that this behaviour is also nearly optimal, a quality typically also associated with rational agents. Optimality in this context refers to the costs and rewards associated with action execution. It thus would be useful to extend agent programming languages with primitives that allow the specification of near-optimal behaviour. The idea is that quantitative heuristics added to an agent program prune some of the options generated by the qualitative action selection mechanism. In this paper, we explore the expressivity needed to specify such behaviour in the Blocks World domain. The programming constructs that we introduce allow for a high-level specification of such heuristics due to the fact that these can be defined by (re)using the qualitative notions of the basic agent programming language again. We illustrate the use of these constructs by extending a Goal Blocks World agent with various strategies to optimize its behaviour.
Concern-Oriented and Ontology-Based Design Approach of Software Architectures
Authors: Crenguta Madalina Bogdan
Venue: Proceedings of the 2008 10th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (2008)

The obtainment of a quality software architecture that fulfils the design principles and addresses the stakeholders'concerns is an ongoing problem. In this paper, we present an approach to construct modular software architectures based on the stakeholders' concerns and the domain ontology of the informational system where the software system will operate. The approach uses the Model-View-Controller architectural pattern and fulfils new additional design rules. We applied the approach in the design and implementation of the software architecture of a system that provides the selection criteria of the subjects in the clinical trials.
Heart on the road: HRV analysis for monitoring a driver's affective state
Authors: Andreas Riener, Alois Ferscha, Mohamed Aly
Venue: Proceedings of the 1st International Conference on Automotive User Interfaces and Interactive Vehicular Applications (2009)

Driving a vehicle is a task affected by an increasing number and a rising complexity of Driver Assistance Systems (DAS) resulting in a raised cognitive load of the driver, and in consequence to the distraction from the main activity of driving. A number of potential solutions have been proposed so far, however, although these techniques broaden the perception horizon (e. g. the introduction of the sense of touch as additional information modality or the utilization of multimodal instead of unimodal interfaces), they demand the attention of the driver too. In order to cope with the issues of workload and/or distraction, it would be essential to find a non-distracting and noninvasive solution for the emergence of information. In this work we have investigated the application of heart rate variability (HRV) analysis to electrocardiography (ECG) data for identifying driving situations of possible threat by monitoring and recording the autonomic arousal states of the driver. For verification we have collected ECG and global positioning system (GPS) data in more than 20 test journeys on two regularly driven routes during a period of two weeks. The first results have shown that an indicated difference of the arousal state of the driver for a dedicated point on a route, compared to its usual state, can be interpreted as a warning sign and used to notify the driver about this, perhaps safety critical, change. To provide evidence for this hypothesis it would be essential in the next step to conduct a large number of journeys on different times of the day, using different drivers and various roadways.
Revisiting readability: a unified framework for predicting text quality
Authors: Emily Pitler, Ani Nenkova
Venue: Proceedings of the Conference on Empirical Methods in Natural Language Processing (2008)

We combine lexical, syntactic, and discourse features to produce a highly predictive model of human readers' judgments of text readability. This is the first study to take into account such a variety of linguistic factors and the first to empirically demonstrate that discourse relations are strongly associated with the perceived quality of text. We show that various surface metrics generally expected to be related to readability are not very good predictors of readability judgments in our Wall Street Journal corpus. We also establish that readability predictors behave differently depending on the task: predicting text readability or ranking the readability. Our experiments indicate that discourse relations are the one class of features that exhibits robustness across these two tasks.
Developing a Nomenclature for EMR Errors
Authors: Win Phillips, Yang Gong
Venue: Proceedings of the 13th International Conference on Human-Computer Interaction. Part IV: Interacting in Various Application Domains (2009)

Latent medical errors may occur in electronic medical record (EMR) systems. Analyses of medical errors, including the cognitive theory of action and the systems approach, are described. Key aspects of EMR systems are presented and examples are provided. A nomenclature is suggested to improve reporting and communication about EMR errors. The nomenclature uses concepts of an error state and a precipitating event. The error state comprises an error element, an error condition, and an error context. The precipitating event comprises an event agent, and event task, and an event context. The event task includes a task object, a task action, and task parameters.
Introduction to Mastering Cell BE and GPU Execution Platforms
Authors: Ed Deprettere, Ana L. Varbanescu
Venue: Proceedings of the 9th International Workshop on Embedded Computer Systems: Architectures, Modeling, and Simulation (2009)

Both Cell BE-type and GPU processors have emerged as multi-processor execution platforms that can outperform general purpose multi-core computers in certain application domains. The two architectures are quite different, and by no means interchangeable. GPUs are reminiscent of fine-grained systolic array architectures, while the Cell BE is suitable to execute a set of co-ordinated coarse-grained tasks. By now, enough applications have been mapped on either of these two processors, mostly by hand, that the pros and cons tables can be filled. The next step is to provide mappings that are based on efficient programming models and methods, in particular methods that minimize communication overheads. The six papers in this special session are attempts to take precisely that route. Three of them are taking the GPU as the underlying execution platform, the third taking also the Cell-BE multicore processor into consideration. The other three papers are targetting the Cell-BE processor.
The Study on Vibration of Drill-String in the Deeper Wells by ANSYS
Authors: Han Chunjie, Yan Tie
Venue: Proceedings of the 2009 International Conference on Computational Intelligence and Natural Computing - Volume 01 (2009)

In presence, going with the exploiture of oil and gas, the engineering has developed toward the direction of super deeper well, the problem of drill-string fatigue has a great effect to drilling engineering. Strong vibration is one of the main reasons. Computer can simulate the system of drill-string, and calculate the problem of drilling movetion. Drill-string of deeper well is object being studied. The models about axial vibration, lateral vibration and torsional vibration are set up. Modal vibrations of drill-string are studied. Rules of all sorts of nature frequency are obtained by drilling instance.This study can prove theory bases for optimizing drill parameter of deeper well and how to reduce drill-string failure.
Recognition-Based Segmentation of Nom Characters from Body Text Regions of Stele Images Using Area Voronoi Diagram
Authors: Thai V. Hoang, Salvatore Tabbone, Ngoc-Yen Pham
Venue: Proceedings of the 13th International Conference on Computer Analysis of Images and Patterns (2009)

Segmentation of Nom characters from body text regions of stele images is a challenging problem due to the confusing spatial distribution of the connected components composing these characters. In this paper, for each vertical text line, area Voronoi diagram is employed to represent the neighborhood of the connected components and Voronoi edges are used as nonlinear segmentation hypotheses. Characters are then segmented by selecting appropriate adjacent Voronoi regions. For this purpose, we utilize the information about the horizontal overlap of connected components and the recognition distances of candidate characters provided by an OCR engine. Experimental results show that the proposed method is highly accurate and robust to various types of stele.
Modeling Peripersonal Action Space for Virtual Humans Using Touch and Proprioception
Authors: Nhung Nguyen, Ipke Wachsmuth
Venue: Proceedings of the 9th International Conference on Intelligent Virtual Agents (2009)

We propose a computational model for building a tactile body schema for a virtual human. The learned body structure of the agent can enable it to acquire a perception of the space surrounding its body, namely its peripersonal space. The model uses tactile and proprioceptive informations and relies on an algorithm which was originally applied with visual and proprioceptive sensor data. In order to feed the model, we present work on obtaining the nessessary sensory data only from touch sensors and the motor system. Based on this, we explain the learning process for a tactile body schema. As there is not only a technical motivation for devising such a model but also an application of peripersonal action space, an interaction example with a conversational agent is described.
Distributed Feedback Mechanism for Just-In-Time Scheduling Problem
Authors: Wei Weng, Shigeru Fujimura
Venue: Proceedings of the 2009 Eigth IEEE/ACIS International Conference on Computer and Information Science (2009)

The problem considered in this research is the just-in-time scheduling of a manufacturing environment that is able to produce several different products. New jobs come randomly into the system, expected to become one of the products. Each job must go through multiple stages before it can be finished as a product. There are multiple machines at each stage, and the processing time of each product on each machine is different. There exits delivery time between stages. Previous researches did much on the static scheduling of such problem by using mixed integer linear programming. However, little efforts have been made on realtime scheduling, which means the release time of jobs is unknown. But such scheduling is becoming more and more important under the increasingly competitive manufacturing market. In this paper, two distributed feedback mechanisms are proposed to solve the realtime scheduling problem of minimizing earliness and tardiness penalties of all jobs. The simulation shows that the proposed distributed feedback mechanisms deliver quite competitive performance for the targeted problem.
From qualitative to quantitative proofs of security properties using first-order conditional logic
Authors: Joseph Y. Halpern
Venue: Proceedings of the 23rd national conference on Artificial intelligence - Volume 1 (2008)

A first-order conditional logic is considered, with semantics given by a variant of Ε-semantics (Adams 1975; Goldszmidt & Pearl 1992), where Φ→ψ means that Pr(ψ | Φ) approaches 1 super-polynomially-faster than any inverse polynomial. This type of convergence is needed for reasoning about security protocols. A complete axiomatization is provided for this semantics, and it is shown how a qualitative proof of the correctness of a security protocol can be automatically converted to a quantitative proof appropriate for reasoning about concrete security.
Robust decision and optimisation for collaborative parameter design
Authors: Jie Hu, Yinghong Peng, Guangleng Xiong
Venue: International Journal of Computer Applications in Technology (2009)

The overall performance of a complex product generally depends on a number of specifications distributed in multi-teams from different disciplines, such as mechanics, cybernetics, dynamics and so on. The paper presents a robust decision and optimisation approach based on multidisciplinary modelling for complex product development. In this paper, the design knowledge is presented as constraints network from multidisciplinary domain. Then multidisciplinary robust decision and optimisation method is presented to solve the model. The method described in this paper was used to develop knowledge driven multidisciplinary collaborative design system, which is applied to railway vehicle development processing.
Thermal Protection of Residential Buildings in the Period of Energy Crisis and Its Influence on Comfort of Living
Authors: Przemyslaw Nowakowski
Venue: Proceedings of the 5th International on ConferenceUniversal Access in Human-Computer Interaction. Part II: Intelligent and Ubiquitous Interaction Environments (2009)

It has been noticed within a few years now that energy prices soared all over the world. Apart from growing costs of vehicle fuels, prices of energy used in flats have risen. They take a substantial share in domestic budgets. It poses a problem mainly for residents in countries where the building industry have been using less advanced technologies. The solutions applied there refer both to conditions of the residential resources management and selection of building and decor materials. A response to the need for reducing energy consumption in residential buildings comprises successively corrected and tightened legal rules and regulations concerning thermal protection of buildings. Also, the users themselves undertake independent initiatives aimed at reduction of exploitation costs. However, the issue of improving thermal isolation of buildings is a costly venture, and profits from its implementation are noticeable only after many years. The paper will discuss technical tendencies of thermal protection of newly erected residential buildings (passive buildings, among other things) as well as the older ones, subject to so called thermal modernisation. What is more, the paper will concern the influence the buildings have on the living comfort and possibilities of counteracting negative consequences as far as influence of thermal isolation technologies on people, natural environment and a technical condition of buildings is concerned.