Suchergebnisse

Historical Overview -- Algorithms and Data Structures -- Applying Genetic Algorithms to the Load-Balancing Problem -- Parallel Update and Search in Skip Lists -- Asymptotic Probabilistic Analysis of an Algorithm for Addition Subtraction Chains -- Graph Clustering and Caching -- A Comparison of Algorithms for the Triangulation Refinement Problem -- Prime Length Symmetric FFTs and Their Computer Implementations -- Obtaining Intrinsic Shape Properties with a Disparity-Based Photometric Stereo -- Finding the Safest One-Dimensional Path among Obstacles for the Acceleration Constrained Robot -- An Optimized External Sort Algorithm -- Use of Genetic Algorithms to Optimize the Cost of Automotive Wire Harnesses -- Databases and Information Systems -- Hybrid Information Systems: Integrating Data and Knowledge Management -- A Semantic Data Model Approach for the Prototyping of Information Systems -- A Temporal Logic Language for Temporal Conditions Definition -- Multimedia Object Management in an O-O Database Environment -- Database Schema Design: The Contribution of Natural Language Techniques -- Distributed Systems and Computer Architecture -- Modelling Geographic Information Systems Using an Object-Oriented Framework -- The Role of Object Technology in Distributed Systems (Invited Paper) -- Analysis and Control of Computer Systems Distributed in Local Networks -- Garbage Collection in Distributed EZ -- A Design System for Massively Parallel Hardware -- A Collision Resolution Algorithm for Random Access Channels Using Multiple Transmission Levels -- Methodology for the Life Cycle Development of Enterprise Networks -- Channel Routing in the Knock-knee Diagonal Model -- Logic and Knowledge -- Inheritance and Recognition in the Cumulative Typed System for Knowledge Representation SC -- Making Argument Systems Computationally Attractive: Argument Construction and Maintenance -- Lexical Error Correction Using Contextual Linguistic Expectations -- Equilibration and Belief Revision: Strategies for Cooperative Tutoring and Learning -- Metacontrol of a Traffic Simulator Using Situation Semantics -- Abductive Inference of Plans and Intentions in Information Seeking Dialogues -- Cognitive Maps as Human Computer Interface Design Tools for Learning -- On Observational Equivalence and Relational Semantics -- Petri Nets -- Analysis of General Refined Petri Boxes -- Event Modeling with Petri Nets: A Survey and Discussion -- Morphisms to Preserve Structural Properties of Petri Nets -- Studying the Behaviour of Petri Nets through a Formalization as Term Rewriting Systems -- Software Engineering and Programming Languages -- The Management of a Cooperative Environment -- Combining Instance and Class-Based Descriptions in Hypermedia Authoring -- How Programming Can Be Visualized: A Practical Approach -- A Process Model to Transform Evaluation from Human Review to Automatic Measurement -- Planning Methodology of Information Systems under Cooperative Design -- Pacific: A Programming Language Based on the Idea of Natural Naming -- Evaluation of Logic Programs in a Relational Language -- A Synthetic Approach to Object Oriented Analysis -- Graphical Animation of LOTOS Specifications -- Integrated-Specifications Analysis -- Author Index.

Comunicació presentada al WWW'20: International World Wide Web Conference, celebrat del 20 al 24 d'abril de 2020 a Taipei, Taiwan. ; Social media data is often used to pulse the opinion of online communities, either by predicting sentiment or stances (e.g., political), to mention just two typical use cases. However, those analysis assume that the data samples really represent the underlying demographics of the overall community, both, in number and characteristics, which in most cases is not true. As a result, extrapolating these results to larger populations usually do not work. This happens because social media data is inherently biased, mainly due to two facts: (1) not all people is equally active in social media platforms and most of them are really passive; and (2) there are demographic biases in gender and age, among other attributes. Hence, the questions of how representative is the data and if is possible to make it representative are of crucial importance. We also discuss related issues such as using public samples of mostly private platforms as well as typical errors in the analysis of such data.

Historical Overview -- Office Information Systems Engineering -- Update Languages vs. Query Languages -- OPUS: An Extensible Optimizer for Up-to-Date Database Systems -- A Hyperlcon Interface to a Blackboard System for Planning Research Projects -- Chusaurus: A Writing Tool Resource for Non-Native Users of English -- Trends in Representing the Semantics of Natural Language Sentences: A Comparative Study -- Extending Partial Evaluation in Logic Programming -- Modules, Macros and Lisp -- Using Filters to Improve the Efficiency of Game-Playing Learning Procedures -- An O(n2.5) Time Heuristic Algorithm for a Class of Large Weighted Edge Colouring Problem -- Randomized Sorting of Shuffled Monotone Sequences -- A Classification of Quadratic Algorithms for Multiplying Polynomials of Small Degree Over Finite Fields -- An Algorithm for Computing Multivariate Polynomial Resultants -- New Absorbing and Ergodic Doubly-Linked List Reorganizing Heuristics -- Skip Sort-An Adaptive Randomized Algorithm or Expected Time Adaptivity is Best -- Data Structures and Access Methods for Read-Only Optical Disks -- Mixed-Radix Huffman Codes -- A Schema Manipulation Mechanism for an OODB Model -- Versions in the Context of Object-Oriented Database Systems -- Ddraw: An Object-Oriented Design Tool -- A Graphical Interactive Object-Oriented Development System -- A Concurrent Object-Oriented Paradigm for Attribute Grammars -- Preserving Distributed Data Coherence Using Asynchronous Broadcasts -- An Implementation of Service Rebalancing -- Bit Optimal Distributed Consensus -- An Efficient Distributed Termination -- Allocating Modules to Processors in a Distributed System with Limited Memory -- The Complexity of Algorithmic Problems on Succint Instances (Invited paper -- Parallel Algorithms for NP-Complete Problems (Invited paper -- Parallel Search in Sorted Multisets, and NP-Complete Problems -- Towards Understanding the Effective Parallelization of Sequential Algorithms -- On the Density of the Probabilistic Polynomial Classes -- Modelling and Simulation of a Pseudosystolic Processor for Matrix Algorithms -- The Caracas Multiprocessor System -- A New Communication Systems Architecture Supporting Migration to OSI -- Modelling and Analysis of Time Critical Applications on Local Area Networks -- Matrix Multiplication on Digital Signal Processors and Hierarchical Memory Systems -- Author Index.

Historical Overview -- Office Information Systems Engineering -- Update Languages vs. Query Languages -- OPUS: An Extensible Optimizer for Up-to-Date Database Systems -- A Hyperlcon Interface to a Blackboard System for Planning Research Projects -- Chusaurus: A Writing Tool Resource for Non-Native Users of English -- Trends in Representing the Semantics of Natural Language Sentences: A Comparative Study -- Extending Partial Evaluation in Logic Programming -- Modules, Macros and Lisp -- Using Filters to Improve the Efficiency of Game-Playing Learning Procedures -- An O(n2.5) Time Heuristic Algorithm for a Class of Large Weighted Edge Colouring Problem -- Randomized Sorting of Shuffled Monotone Sequences -- A Classification of Quadratic Algorithms for Multiplying Polynomials of Small Degree Over Finite Fields -- An Algorithm for Computing Multivariate Polynomial Resultants -- New Absorbing and Ergodic Doubly-Linked List Reorganizing Heuristics -- Skip Sort-An Adaptive Randomized Algorithm or Expected Time Adaptivity is Best -- Data Structures and Access Methods for Read-Only Optical Disks -- Mixed-Radix Huffman Codes -- A Schema Manipulation Mechanism for an OODB Model -- Versions in the Context of Object-Oriented Database Systems -- Ddraw: An Object-Oriented Design Tool -- A Graphical Interactive Object-Oriented Development System -- A Concurrent Object-Oriented Paradigm for Attribute Grammars -- Preserving Distributed Data Coherence Using Asynchronous Broadcasts -- An Implementation of Service Rebalancing -- Bit Optimal Distributed Consensus -- An Efficient Distributed Termination -- Allocating Modules to Processors in a Distributed System with Limited Memory -- The Complexity of Algorithmic Problems on Succint Instances (Invited paper -- Parallel Algorithms for NP-Complete Problems (Invited paper -- Parallel Search in Sorted Multisets, and NP-Complete Problems -- Towards Understanding the Effective Parallelization of Sequential Algorithms -- On the Density of the Probabilistic Polynomial Classes -- Modelling and Simulation of a Pseudosystolic Processor for Matrix Algorithms -- The Caracas Multiprocessor System -- A New Communication Systems Architecture Supporting Migration to OSI -- Modelling and Analysis of Time Critical Applications on Local Area Networks -- Matrix Multiplication on Digital Signal Processors and Hierarchical Memory Systems -- Author Index.