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The 10th International Conference on Autonomous Agents and Multiagent Systems - Volume 1

作者： Christian Hütter Klemens Böhm Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany

ISBN: (纸本)9780982657157

The Service Game is a model for reciprocity in multiagent systems. Here, agents interact repeatedly by requesting and providing services. In contrast to existing models where players are matched randomly, players of the Service Game may choose with whom they play. The rationale behind provider selection is to choose a provider that is likely to perform a task as desired. We develop a formal model for provider selection in the Service Game. An evolutionary process based on a genetic algorithm allows us to incorporate notions of bounded rationality, learning, and adaptation into the analysis of the game. We conduct a series of experiments to study the evolution of strategies and the emergence of cooperation. We show that cooperation is more expensive with provider selection than with random matching. Further, populations consisting of discriminators and defectors form a bistable community.

关键词： agent cooperation evolution formal model social simulation

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Strategic Provider Selection in a Policy-Based Helping Scenario

Strategic Provider Selection in a Policy-Based Helping Scena...

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IEEE International Conference on E-Commerce Technology Workshops

作者： Christian Hutter Jing Zhi Yue Christian von der Weth Klemens Bohm Institute of Program Structures and Data Organization Karlsruhe Institute of Technology Germany

In service-oriented computing, software agents interact by requesting and providing services. Since providing a service incurs cost, uncooperative behavior dominates in the absence of an incentive mechanism. An economic model that describes interactions between individuals is the Helping Game. There, pairs of requester and provider are randomly matched. In various real-world applications in turn, several providers offer similar services, and requesters have a choice of providers. The rationale behind strategic provider selection is to choose the provider that is most likely to perform the task as desired. The results from existing studies of the Helping Game are not directly applicable to settings with provider selection. To analyze how strategic provider selection affects the efficiency of enterprise systems, we have designed and carried out an experimental study. Our results show that cooperative participants receive significantly more requests than uncooperative ones, making cooperation expensive. We conclude that system designers must incentivize requesters to balance their tasks between providers.

关键词： Games Economics Biological system modeling Manuals Software agents Analytical models Computational modeling

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Collaborative modeling enabled by version control

Collaborative modeling enabled by version control

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Fachtagung Modellierung, 2018

作者： Kuryazov, Dilshod Winter, Andreas Reussner, Ralf University of Oldenburg Software Engineering Group Uhlhornsweg 84 Oldenburg26111 Germany Karlsruhe Institute of Technology Institute for Program Structures and Data Organization Postfach 6980 KarlsruheD-76128 Germany

ISBN: (纸本)9783885796749

Model-Driven Software Development is a key field in software development activities which is well-suited to design and develop large-scale software systems. Developing and maintaining large-scale model-driven software systems entail a need for collaborative modeling by a large number of software designers and developers. As long as software models are constantly changed during development and maintenance, collaborative modeling requires frequently sharing of model changes between collaborators. Thereby, a solid change representation support for model changes plays an essential role for collaborative modeling systems. This paper focuses on the problem of model change representation for collaborative modeling. It introduces a meta-model generic, operation-based and textual difference language to represent model changes in collaborative modeling. This paper also demonstrates a collaborative modeling application Kotelett. © 2018 Gesellschaft fur Informatik (GI).

关键词： Software design

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Service oer and request descriptions in mobile environments?

Service oer and request descriptions in mobile environments?

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8th Workshop of the German Informatics Society on Mobile databases and Information Systems: Mobile databases - Today, Tomorrow and in 20 Years, GI 2005, GI Conference on database Systems for Business, Technology and Web, BTW 2005

作者： Grunbauer, Johannes Klein, Michael Institut fur Informatik Technische Universität München 85748 Garching Germany Institute for Program Structures and Data Organization Universität Karlsruhe 76128 Karlsruhe Germany

In order to obtain robust and context-aware applications in mobile environments, service oriented computing can be a very promising programming paradigm. Here, the participants cooperate in a loosely coupled manner by invoking context-depend services on demand. However, the approach demands for an expressive description of the offered and requested services. This paper aims at giving a basis for discussion on the requirements and approaches when describing services for mobile environments.

关键词： Distributed computer systems

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Formal verification of dead code elimination in Isabelle/HOL

Formal verification of dead code elimination in Isabelle/HOL

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International Conference on Software Engineering and Formal Methods (SEFM)

作者： J.O. Blech L. Gesellensetter S. Glesner Institute for Program Structures and Data Organization University of Karlsruhe Karlsruhe Germany

Correct compilers are a vital precondition to ensure software correctness. Optimizations are the most error-prone phases in compilers. In this paper, we formally verify dead code elimination (DCE) within the theorem prover Isabelle/HOL. DCE is a popular optimization in compilers which is typically performed on the intermediate representation. In our work, we reformulate the algorithm for DCE so that it is applicable to static single assignment (SSA) form which is a state of the art intermediate representation in modern compilers, thereby showing that DCE is significantly simpler on SSA form than on classical intermediate representations. Moreover, we formally prove our algorithm correct within the theorem prover Isabelle/HOL. Our program equivalence criterion used in this proof is based on bisimulation and, hence, captures also the case of non-termination adequately. Finally we report on our implementation of this verified DCE algorithm in the industrial-strength scale compiler system.

关键词： Formal verification program processors Optimizing compilers Information analysis Software engineering data analysis Performance analysis Algorithm design and analysis Computer languages Software design

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At your command! an empirical study on how laypersons teach robots new functions

arXiv

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arXiv 2020年

作者： Weigelt, Sebastian Steurer, Vanessa Tichy, Walter F. Karlsruhe Institute of Technology Institute for Program Structures and Data Organization Karlsruhe Germany

Even though intelligent systems such as Siri or Google Assistant are enjoyable (and useful) dialog partners, users can only access predefined functionality. Enabling end-users to extend the functionality of intelligent systems will be the next big thing. To promote research in this area we carried out an empirical study on how laypersons teach robots new functions by means of natural language instructions. The result is a labeled corpus consisting of 3168 submissions given by 870 *** analysis of the dataset revealed that many participants used certain wordings to express their wish to teach new functionality;two corresponding trigrams are among the most frequent. On the contrary, more than one third (36.93%) did not verbalize the teaching intent at all. We labeled the semantic constituents in the utterances: declaration (including the name of the function) and intermediate steps. The full corpus is publicly available: http://***/10.21227/zecn-6c61 Copyright © 2020, The Authors. All rights reserved.

关键词： Intelligent systems

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Detection of Conditionals in Spoken Utterances

Detection of Conditionals in Spoken Utterances

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International Conference on Semantic Computing

作者： Sebastian Weigelt Tobias Hey Vanessa Steurer Karlsruhe Institute of Technology Institute for Program Structures and Data Organization Karlsruhe Germany

State-of-the-art intelligent assistant systems such as Siri & Co. struggle with conditionals. They reliably react to ordinary commands. However, their architectures are not designed to cope with complex conditional queries. We propose a system to overcome these limitations. Our approach models if-then-else constructs in spoken utterances explicitly. The model bridges the gap between linguistic and programmatic semantics. To proof our concept, we apply a rule-based approach to extract conditionals. For our prototype we use part-of-speech and chunk tags provided by NLP tools. We make use of coreference information to determine the reference frame of a condition. The explicit modeling of conditionals allows us to evaluate the accuracy of our approach independently from other language understanding tasks. The prototype works well in the domain of humanoid robotics. In a user study we achieve F1 scores of 0.783 (automatic speech recognition) up to 0.898 (manual transcripts) on unrestricted utterances.

关键词： Semantics Task analysis Robots Linguistics Tools Ontologies

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Asynchronous Service Discovery in Mobile Ad-hoc Networks

Asynchronous Service Discovery in Mobile Ad-hoc Networks

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Persistence, Scalability, Transactions - database Mechanisms for Mobile Applications 2003

作者： Nagi, Khaled König-Ries, Birgitta Computer Science Department Faculty of Engineering Alexandria University El-Shatby Alexandria Egypt Institute for Program Structures Data Organization Universität Karlsruhe KarlsruheD-76128 Germany

ISBN: (纸本)3885793725

The wide availability of mobile devices equipped with wireless communication devices paves the way for building highly dynamic communities of ad-hoc networks. For an asynchronous service discovery in this environment, we suggest the use of mobile agents. Here, we concentrate on file sharing and exchanging services. We adopt a new asynchronous approach for discovering and locating these files, since the availability of files in this particular domain will change significantly over time when nodes constantly join and leave the network. In this paper, we present a typical application scenario, highlight the main components of the system architecture and discuss the technical challenges facing us while trying to port main infrastructural features of traditional database management systems to our mobile light-weight software agents. © 2003 Gesellschaft fur Informatik (GI). All rights reserved.

关键词： Mobile agents

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Online-Autotuning of Parallel SAH kD-Trees

Online-Autotuning of Parallel SAH kD-Trees

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Martin Tillmann Philip Pfaffe Christopher Kaag Walter F. Tichy Institute of Program Structures & Data Organization Karlsruhe Institute of Technology Karlsruhe Germany

ISBN: (纸本)9781509021413

We explore the benefits of using online-autotuning to find an optimal configuration for the parallel construction of Surface Area Heuristic (SAH) kD-trees. Using a quickly converging autotuning mechanism, we achieve a significant performance improvement of up to 1.96x. The SAH kD-tree is a spatial data structure and a fundamental tool in the domain of computer graphics and simulations. The parallel construction of these trees is influenced by several parameters, controlling various aspects of the algorithm. However, the parameter configurations advocated in the literature are hardly ever portable. To boost portability, we apply online-autotuning to four state-of-the-art variants of parallel kD-tree construction. We show that speedups over the variants' standard configurations are possible with low programmer effort. We further demonstrate the performance portability of our approach by evaluating performance on varying multicore platforms and both static and dynamic geometries.

关键词： Tuning data structures Ray tracing Geometry Hardware Parallel algorithms Rendering (computer graphics)

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At Your Command! An Empirical Study on How Laypersons Teach Robots New Functions

At Your Command! An Empirical Study on How Laypersons Teach ...

引用

International Conference on Semantic Computing

作者： Sebastian Weigelt Vanessa Steurer Walter F. Tichy Karlsruhe Institute of Technology Institute for Program Structures and Data Organization Karlsruhe Germany

ISBN: (数字)9781728163321

ISBN: (纸本)9781728163338

Even though intelligent systems such as Siri or Google Assistant are enjoyable (and useful) dialog partners, users can only access predefined functionality. Enabling end-users to extend the functionality of intelligent systems will be the next big thing. To promote research in this area we carried out an empirical study on how laypersons teach robots new functions by means of natural language instructions. The result is a labeled corpus consisting of 3168 submissions given by 870 subjects. The analysis of the dataset revealed that many participants used certain wordings to express their wish to teach new functionality; two corresponding trigrams are among the most frequent. On the contrary, more than one third (37%) did not verbalize the teaching intent at all. We labeled the semantic constituents in the utterances: declaration (including the name of the function) and intermediate steps. The full corpus is publicly available: http://***/10.21227/zecn-6c61.

关键词： Education Semantics Intelligent systems Task analysis Vocabulary programming Humanoid robots

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