ppxscal/embedding_network huggingface dataset:
A data warehouse environment for storing and analyzing simulation output data
Authors: Christos Vasilakis, Elia El-Darzi, Panagiotis Chountas
Venue: Proceedings of the 36th conference on Winter simulation (2004)

Discrete event simulation modelling has been extensively used in modelling complex systems. Although it offers great conceptual-modelling flexibility, it is both computationally expensive and data intensive. There are several examples of simulation models that generate millions of observations to achieve satisfactory point and confidence interval estimations for the model variables. In these cases, it is exceptionally cumbersome to conduct the required output and sensitivity analysis in a spreadsheet or statistical package. In this paper, we highlight the advantages of employing data warehousing techniques for storing and analyzing simulation output data. The proposed data warehouse environment is capable of providing the means for automating the necessary algorithms and procedures for estimating different parameters of the simulation. These include initial transient in steady-state simulations and point and confidence interval estimations. Previously developed models for evaluating patient flow through hospital departments are used to demonstrate the problem and the proposed solutions.
An Approach to Composing Multiple Component Implementations for Satisfying Quality Requirements
Authors: Jie Yang, Gang Huang, Li Zhou, Zhao Liu, Meng Ye, Ying Chen
Venue: Proceedings of the Sixth International Conference on Quality Software (2006)

In component-based software systems, sometimes it is difficult to find a single component implementation that satisfies requirements concerning multiple qualities. However, it is possible to compose multiple implementations with identical functions but different qualities to satisfy the requirement. The keys to the composition include (a) finding out the requirement which requires the composition and (b) the design of composition policy to ensure the desired qualities. In this paper, we present an approach consisting of three steps to the composition of component implementations. The identification step leverages some analysis method to find out the necessity of composition as well as the according candidate implementations. The policy design step is responsible for the design and description of composition policies, which are proved to provide the desired qualities. The implementation step carries out the designed policies. The last two steps can be automated to a certain degree. The example of Java Pet Store demonstrates the approach.
Dissociating Explicit and Implicit Category Knowledge with fMRI
Authors: Paul J. Reber, Darren R. Gitelman, Todd B. Parrish, M. Marsel Mesulam
Venue: Journal of Cognitive Neuroscience (2003)

Neuroimaging of healthy volunteers identified separate neural systems supporting the expression of category knowledge depending on whether the learning mode was intentional or incidental. The same visual category was learned either intentionally or implicitly by two separate groupsof participants. During a categorization test, functional magnetic resonance imaging (fMRI) was used to compare brain activity evoked by category members and nonmembers. After implicit learning, when participants had learned the category incidentally, decreased occipital activity was observed for novel categorical stimuli compared with noncategorical stimuli. In contrast, after intentional learning, novel categorical stimuli evoked increased activity in the hippocampus, right prefrontal cortex, left inferior temporal cortex, precuneus, and posterior cingulate. Even though the categorization test was identical in the two conditions, the differences in brain activity indicate differing representations of category knowledge depending on whether the category had been learned intentionally or implicitly.
Messy learning environments: busy hands and less engaged minds
Authors: Christina M. Gardner, Tamara L. Clegg, Oriana J. Williams, Janet L. Kolodner
Venue: Proceedings of the 7th international conference on Learning sciences (2006)

In an environment where learners are engrossed in highly interactive and fun hands-on activities, how do we get their minds as engaged as their hands? We have found that busy hands help sustain learners' motivation and interest but can distract their minds from doing the necessary reflection on their actions. This paper and the accompanying poster describe conditions and affordances of media and prompts that focus and encourage distracted learners reflection.
Intelligent preemption in construction of a manmade island for an airport
Authors: Photios G. Ioannou, Vineet R. Kamat
Venue: Proceedings of the 37th conference on Winter simulation (2005)

This paper presents the simulation model and 3D animation for a project involving large-scale undersea land reclamation for the construction of a manmade island for an airport. The model illustrates how intelligent preemption can be dynamically used at simulation runtime to enforce the operational policies of a tug boat that guides barges loaded with earth into the island for unloading and then out into the sea after unloading is complete. The example also investigates the repeated stalling of the otherwise continuous unloading operations due to the need to share the narrow island entrance channel with watercraft supporting other construction activities. The solution to this problem is out-lined conceptually using the activity-scanning modeling paradigm. The solution is described in detail using a simulation model developed in STROBOSCOPE and a 3D animation created using VITASCOPE.
On Nonparametric Predictive Inference and Objective Bayesianism
Authors: F. P. Coolen
Venue: Journal of Logic, Language and Information (2006)

This paper consists of three main parts. First, we give an introduction to Hill's assumption A (n) and to theory of interval probability, and an overview of recently developed theory and methods for nonparametric predictive inference (NPI), which is based on A (n) and uses interval probability to quantify uncertainty. Thereafter, we illustrate NPI by introducing a variation to the assumption A (n), suitable for inference based on circular data, with applications to several data sets from the literature. This includes attention to comparison of two groups of circular data, and to grouped data. We briefly discuss such inference for multiple future observations. We end the paper with a discussion of NPI and objective Bayesianism.
Data envelopment analysis with missing values: an interval DEA approach
Authors: Yannis G. Smirlis, Elias K. Maragos, Dimitris K. Despotis
Venue: Applied Mathematics and Computation (2006)

Missing values in inputs, outputs cannot be handled by the original data envelopment analysis (DEA) models. In this paper we introduce an approach based on interval DEA that allows the evaluation of the units with missing values along with the other units with available crisp data. The missing values are replaced by intervals in which the unknown values are likely to belong. The constant bounds of the intervals, depending on the application, can be estimated by using statistical or experiential techniques. For the units with missing values, the proposed models are able to identify an upper and a lower bound of their efficiency scores. The efficiency analysis is further extended by estimating new values for the initial interval bounds that may turn the unit to an efficient one. The proposed methodology is illustrated by an application which evaluates the efficiency of a set of secondary public schools in Greece, a number of which appears to have missing values in some inputs and outputs.
Binocular Stereo Dense Matching in the Presence of Specular Reflections
Authors: Wei Zhou, Chandra Kambhamettu
Venue: Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2 (2006)

Traditional stereo correspondence algorithms rely heavily on the Lambertian model of diffuse reflectance. While this diffuse assumption is generally valid for much of an image, processing of regions that contain specular reflections can result in severe matching errors. In this paper, We address the problem of binocular stereo dense matching in the presence of specular reflections by introducing a novel correspondence measurement which is robust to the specular reflections. Combining our novel correspondence measurement with various local or global optimatization methods, accurate depth can be estimated for both diffuse and specular regions. Unlike the previous works which seek to eliminate or avoid specular reflections using image preprocessing or multibaseline stereo, our approach works in its presence. Our approach is general and fits well in various stereo frameworks. Experiments with both synthetic and real images demonstrate the effectiveness and robustness of our approach.
Taking class importance into account
Authors: Jose-Luis Polo, Fernando Berzal, Juan-Carlos Cubero
Venue: Proceedings of the 2006 International Conference on Hybrid Information Technology - Volume 01 (2006)

In many classification problems, some classes are more important than others from the users' perspective. In this paper, we introduce a novel approach, weighted classification, to address this issue by modeling class importance through weights in the [0,1] interval. We also propose novel metrics to evaluate the performance of classifiers in a weighted classification context. In addition, we make some modifications to the ART classification model [3] in order to deal with weighted classification.
PHP 5 in Practice
Authors: Elliott White, Jonathan D. Eisenhamer
Venue:  (2006)

With the release of PHP 5 web developers need a guide to developing with PHP 5 to both learn its complex new features and more fully implement the long-standing features on which PHP's success is built. PHP 5 in Practice is a reference guideï¾ that provides developers with easy-to-use and easily extensible code to solve common PHP problems. It focuses on providing real code solutions to problems, allowing the reader to learn by seeing exactly what is happening behind the scenes to get your solution. Because a real-life situation will rarely match the book's example problems precisely, PHP 5 in Practice explains the solution well enough that you will understand it and can learn how to truly solve your own problem.
A reference model for IT management responsibilities
Authors: Magnus Gammelgard, Asa Lindstrom, Marten Simonsson
Venue: Proceedings of the 10th IEEE on International Enterprise Distributed Object Computing Conference Workshops (2006)

This reference model for IT management responsibilities covers the most important aspects when modeling, analyzing and evaluating enterprise architecture, EA. The reference model can be employed to support IT management in their quest to make well-informed decisions, e.g. to derive architectural principles in order to obtain a proper scope for EA activities, measure the status of the current EA, follow up changes committed, and evaluate alternative EA scenarios. The model is based on extensive literature studies and has been tested in a series of empirical studies.
Maximum entropy characterizations of the multivariate Liouville distributions
Authors: Bhaskar Bhattacharya
Venue: Journal of Multivariate Analysis (2006)

A random vector X = (X1, X2,...,Xn) with positive components has a Liouville distribution with parameter θ = (θ1, θ2,...,θn) if its joint probability density function is proportional to h(Σi=1n xi) Φi=1n xiθi-1, θi > 0 [R.D. Gupta, D.S.P. Richards, Multivariate Liouville distributions, J. Multivariate Anal. 23 (1987) 233-256]. Examples include correlated gamma variables, Dirichlet and inverted Dirichlet distributions. We derive appropriate constraints which establish the maximum entropy characterization of the Liouville distributions among all multivariate distributions. Matrix analogs of the Liouville distributions are considered. Some interesting results related to I-projection from a Liouville distribution are presented.
Composing Components in Design Phase using Exogenous Connectors
Authors: Kung-Kiu Lau, Ling Ling, Zheng Wang
Venue: Proceedings of the 32nd EUROMICRO Conference on Software Engineering and Advanced Applications (2006)

Composition can take place during different stages of component life cycle. We identify two main stages : design phase - components are composed into composite components for reuse; deployment phase - components are compiled and the resulting binaries are assembled into executable systems. Ideally, the design phase composition should maximise component reuse. However, this ideal is not realised in current component-based development because they can not reuse composite components in design phase. In this paper, we propose a novel approach for composing components in design phase using exogenous connectors. In contrast to existing composition approaches, our approach allows composite components built in design phase to be further reusable in both design and deployment phases so as to achieve both component reuse and design flexibility. We demonstrate the feasibility of our approach in an industrial-strength case study - Automatic Train Protection system, and compare them with the closely-related existing composition approaches.
Layout-Aware Scan Chain Reorder for Skewed-Load Transition Test Coverage
Authors: Sying-Jyan Wang, Kuo-Lin Peng, Katherine Shu-Min Li
Venue: Proceedings of the 15th Asian Test Symposium (2006)

In this paper, we propose a layout-based scan chain ordering method to improve fault coverage for skewedload delay test with minimum routing overhead. This approach provides many advantages over previous methods. (1) The proposed method can provide 100% test pair coverage for all detectable transition faults. (2) With layout information taken into account, the routing penalty is small, and thus the impact on circuit performance will not be significant.
An Ontology for Observation of Multiagent Based Simulation
Authors: Tiana Ralambondrainy, Remy Courdier, Denis Payet
Venue: Proceedings of the 2006 IEEE/WIC/ACM international conference on Web Intelligence and Intelligent Agent Technology (2006)

In MultiAgent Based Simulation (MABS), the observation of simulation results is a complex task: interactions between simulation agents produce a large mass of simulation results, which is particularly complex to analyze. We are assured that the use of another second multiagent system is a suitable approach to achieve this task. This second system then introduces a new category of agents called observation agents. The first step to build this multiagent system for observation is to define a specification of concepts used between its observation agents. Our contribution is an ontology for observation of MABS. This ontology is composed of a set of concepts and relations usable to acquire and process simulation results, and to produce their presentation form. This ontology has three main root classes: ObservationElements, Processing, and Presentation.
Mathematical control model for beam dynamics optimization
Authors: D. A. Ovsyannikov, A. D. Ovsyannikov
Venue: Proceedings of the 2003 International Conference on Physics and Control - Volume 3 (2003)

A special class of the problems attracting attention of numerous researches is represented by the problems associated with the beam dynamics optimization in accelerators of charged particles. In this paper problem of beam dynamics optimization is considered as a control theory problem. Problem statement is considered on the pattern of linear accelerating on traveling wave.
An efficient performance extrapolation for queuing models in transient analysis
Authors: Mohamed A. Ahmed, Talal M. Alkhamis
Venue: Proceedings of the 37th conference on Winter simulation (2005)

In designing, analyzing and operating real-life complex systems, we are interested, however, not only in performance evaluation but in sensitivity analysis and optimization as well. Since most systems of practical interest are too complex to allow the analytical solution of totally realistic models, these systems must be studied by means of Monte-Carlo simulation. One problem with Monte Carlo analysis is its expensive use of computer time. To address this problem, we propose an efficient technique for estimating the expected performance of a stochastic system for various values of the parameters from a single simulation of the nominal system. This technique is based on the likelihood ratio performance extrapolation (LRPE). We provide numerical experiments that demonstrate how the proposed technique significantly outperform the likelihood ratio performance extrapolation technique in the context of the Markovian queueing models in transient analysis.
The management of cross-functional inter-dependencies in ERP implementations: emergent coordination patterns
Authors: Sanjay Gosain, Zoonky Lee, Yongbeom Kim
Venue: European Journal of Information Systems (2005)

This paper reports a study examining cross-functional coordination in enterprise resource planning (ERP) projects. We collected primary data related to ERP implementations at four large organizations representing different industries and implementation strategies. These are presented through rich descriptions organized on the basis of an emergent process theory framework. Our case studies suggest that there are three main patterns of managing functional inter-dependencies: (a) A lean coordination pattern that involves intricately planned 'vanilla' implementations using reference process models and strong methodologies (b) A rich coordination pattern that is based on managing interdependencies through organizing arrangements and cultural interventions, and (c) A mediation pattern that is based on executive mandate or a dominant functional unit laying out the rules of engagement.This study provides practical implications for industry managers engaged in large-scale enterprise system implementations. It also significantly advances theory by outlining and characterizing cross-functional coordination patterns. Our findings confirm that studying surface regularities as well as the underlying situated phenomena, in combination, can help in generating new insights for guiding ERP projects.
Hierarchical matching for retrieval of hand-drawn sketches
Authors: C. Parker, Tsuhan Chen
Venue: Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 1 (2003)

As pen-based devices become more popular, it has motivated several novel research issues in the area of pen computing. One interesting and practical problem is the storage and retrieval of hand-drawn sketches. A sketch can consist of handwritten notes, symbols, free-form hand-drawings, annotations on a document, and others. It is very useful to store the sketches in a database and then retrieve them later. In our prior work, we proposed a method for hand-drawn sketch retrieval by performing stroke-by-stroke matching and by considering the spatial relationship between them. In this paper, we propose a method to simplify a sketch and perform matching in a hierarchical manner. With this approach, a shaded region or a region of complex strokes can be detected automatically and represented as a single hyper-stroke. In the matching stage, the similarity is computed by combining the similarity scores across the feature spaces at each level and the similarity of the stroke hierarchies. A sketch may be better represented by exploiting the structural relationship between the strokes. In addition, as a general rule to the hierarchical approach, it has the advantage of reduced computation thus the retrieval process would speed up.
Results from introducing component-level test automation and test-driven development
Authors: Lars-Ola Damm, Lars Lundberg
Venue: Journal of Systems and Software (2006)

For many software development organizations it is of crucial importance to reduce development costs while still maintaining high product quality. Since testing commonly constitutes a significant part of the development time, one way to increase efficiency is to find more faults early when they are cheaper to pinpoint and remove. This paper presents empirical results from introducing a concept for early fault detection. That is, an alternative approach to Test-Driven Development which was applied on a component level instead of on a class/method level. The selected method for evaluating the result of introducing the concept was based on an existing method for fault-based process assessment and was proven practically useful for evaluating fault reducing improvements. The evaluation was made on two industrial projects and on different features within a project that only implemented the concept partly. The evaluation result demonstrated improvements regarding decreased fault rates and Return On Investment (ROI), e.g. the total project cost became about 5-6% less already in the first two studied projects.
Query-time entity resolution
Authors: Indrajit Bhattacharya, Lise Getoor, Louis Licamele
Venue: Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining (2006)

The goal of entity resolution is to reconcile database references corresponding to the same real-world entities. Given the abundance of publicly available databases where entities are not resolved, we motivate the problem of quickly processing queries that require resolved entities from such 'unclean' databases. We propose a two-stage collective resolution strategy for processing queries. We then show how it can be performed on-the-fly by adaptively extracting and resolving those database references that are the most helpful for resolving the query. We validate our approach on two large real-world publication databases where we show the usefulness of collective resolution and at the same time demonstrate the need for adaptive strategies for query processing. We then show how the same queries can be answered in real time using our adaptive approach while preserving the gains of collective resolution.
KLAMP an Integrated Open Source Platform for Internet and Mobile Applications
Authors: Teddy Mwakabaga, Barry Dwolatzky
Venue: Proceedings of the Fourth IEEE International Workshop on Technology for Education in Developing Countries (2006)

In this era of converged Information and Communication Technologies (ICT), one major challenge in using modern technologies to disseminate information generated from the local content is the lack of understanding the technologies and unavailability of appropriate tools that can be used to understand the technology in creating not only Internet applications but also mobile applications. Open Source Software has brought a much cheaper and easier path to accessing various tools that can be used for learning, and teaching. This paper presents hands on experience of open source tools that can be used to grasp the technologies in the ICT. The integrated architecture referred to as KLAMP, is a combination of tools and gateway that enable Internet and mobile applications to be easily developed. It is not only suitable as a wireless and mobile learning platform but also can be used for large scale projects.