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This volume contains those research papers presented at the Second International Conference on Tests and Proofs (TAP 2008) that were not included in the main conference proceedings. TAP was the second conference devoted to the convergence of proofs and tests. It combines ideas from both areas for the advancement of software quality. To prove the correctness of a program is to demonstrate, through impeccable mathematical techniques, that it has no bugs; to test a program is to run it with the expectation of discovering bugs. On the surface, the two techniques seem contradictory: if you have proved your program, it is fruitless to comb it for bugs; and if you are testing it, that is surely a sign that you have given up on any hope of proving its correctness. Accordingly, proofs and tests have, since the onset of software engineering research, been pursued by distinct communities using rather different techniques and tools. And yet the development of both approaches leads to the discovery of common issues and to the realization that each may need the other. The emergence of model checking has been one of the first signs that contradiction may yield to complementarity, but in the past few years an increasing number of research efforts have encountered the need for combining proofs and tests, dropping earlier dogmatic views of their incompatibility and taking instead the best of what each of these software engineering domains has to offer. The first TAP conference (held at ETH Zurich in February 2007) was an attempt to provide a forum for the cross-fertilization of ideas and approaches from the testing and proving communities. For the 2008 edition we found the Monash University Prato Centre near Florence to be an ideal place providing a stimulating environment. We wish to sincerely thank all the authors who submitted their work for consideration. And we would like to thank the Program Committee members as well as additional referees for their great effort and professional work in the review and selection process. Their names are listed on the following pages. In addition to the contributed papers, the program included three excellent keynote talks. We are grateful to Michael Hennell (LDRA Ltd., Cheshire, UK), Orna Kupferman (Hebrew University, Israel), and Elaine Weyuker (AT&T Labs Inc., USA) for accepting the invitation to address the conference. Two very interesting tutorials were part of TAP 2008: "Parameterized Unit Testing with Pex" (J. de Halleux, N. Tillmann) and "Integrating Verification and Testing of Object-Oriented Software" (C. Engel, C. Gladisch, V. Klebanov, and P. Rümmer). We would like to express our thanks to the tutorial presenters for their contribution. It was a team effort that made the conference so successful. We are grateful to the Conference Chair and the Steering Committee members for their support. And we particularly thank Christoph Gladisch, Beate Körner, and Philipp Rümmer for their hard work and help in making the conference a success. In addition, we gratefully acknowledge the generous support of Microsoft Research Redmond, who financed an invited speaker.
Zur Entwicklung von Webanwendungen und Webseiten existieren viele verschiedene Technologien und Konzepte. Jede dieser Technologien implementiert bestimmte Anforderungen, wie z.B. das Erzeugen von Inhalten oder die Kommunikation zwischen Client und Server. Verschiedene Konzepte helfen, diese Technologien innerhalb einer Webanwendung zusammenzufügen. Nicht zuletzt Architekturstile und -muster gehören zu diesen Konzepten. Die Diplomarbeit beschreibt einen Ansatz zur Erstellung einer Taxonomie dieser Technologien und Konzepte unter Zuhilfenahme der freien Enzyclopädie Wikipedia, im speziellen der Kategorie "Web-Application Framework". Unser 101companies Projekt benutzt Implementationen, um die einem Web-Application-Framework zugrunde liegenden Technologien zu identifizieren und zu klassifizieren. Innerhalb des Projekts werden Taxonomien und Ontologien mit Hilfe dieser Klassifikationen erstellt. Zusätzlich beschreibt die Ausarbeitung, wie nützliche Web-Application-Frameworks mit der Hilfe von Wikipedia priorisiert werden. Abschließend enthält die Diplomarbeit auch die Dokumentation der betreffenden Implementationen.
Generalized methods for automated theorem proving can be used to compute formula transformations such as projection elimination and knowledge compilation. We present a framework based on clausal tableaux suited for such tasks. These tableaux are characterized independently of particular construction methods, but important features of empirically successful methods are taken into account, especially dependency directed backjumping and branch local operation. As an instance of that framework an adaption of DPLL is described. We show that knowledge compilation methods can be essentially improved by weaving projection elimination partially into the compilation phase.
In Silico simulation of biological systems is an important sub area of computational biology (system biology), and becomes more and more an inherent part for research. Therefore, different kinds of software tools are required. At present, a multitude of tools for several areas exists, but the problem is that most of the tools are essentially application specific and cannot be combined. For instance, a software tool for the simulation of biochemical processes is not able to interact with tools for the morphology simulation and vice versa. In order to obtain realistic results with computer-aided simulations it is important to regard the biological system in its entirety. The objective is to develop a software framework, which provides an interface structure to combine existing simulation tools, and to offer an interaction between all affiliated systems. Consequently, it is possible to re-use existing models and simulation programs. Additionally, dependencies between those can be defined. The system is designed to interoperate as an extendable architecture for various tools. The thesis shows the usability and applicability of the software and discusses potential improvements.
Social networking platforms as creativity fostering systems: research model and exploratory study
(2008)
Social networking platforms are enabling users to create their own content, share this content with anyone they invite and organize connections with existing or new online contacts. Within these electronic environments users voluntarily add comments on virtual boards, distribute their search results or add information about their expertise areas to their social networking profiles and thereby share it with acquaintances, friends and increasingly even with colleagues in the corporate world. As a result, it is most likely that the underlying knowledge sharing processes result in many new and creative ideas. The objective of our research therefore is to understand if and how social social networking platforms can enforce creativity. In addition, we look at how these processes could be embedded within the organizational structures that influence innovative knowledge sharing behavior. The basis for our research is a framework which focuses on the relations between intrinsic motivation, creativity and social networking platforms. First results of our empirical investigation of a social software platform called "StudiVZ.net" proved that our two propositions are valid.
SOA-Security
(2007)
This paper is a part of the ASG project (Adaptive Services Grid) and addresses some IT security issues of service oriented architectures. It defines a service-oriented security concept, it explores the SOA security challenge, it describes the existing WS-Security standard, and it undertakes a first step into a survey on best practice examples. In particular, the ASG middleware platform technology (JBossWS) is analyzed with respect to its ability to handle security functions.
This paper describes results of the simulation of social objects, the dependence of schoolchildren's professional abilities on their personal characteristics. The simulation tool is the artificial neural network (ANN) technology. Results of a comparison of the time expense for training the ANN and for calculating the weight coefficients with serial and parallel algorithms, respectively, are presented.
This paper originates from the FP6 project "Emergence in the Loop (EMIL)" which explores the emergence of norms in artificial societies. Part of work package 3 of this project is a simulator that allows for simulation experiments in different scenarios, one of which is collaborative writing. The agents in this still prototypical implementation are able to perform certain actions, such as writing short texts, submitting them to a central collection of texts (the "encyclopaedia") or adding their texts to texts formerly prepared by other agents. At the same time they are able to comment upon others' texts, for instance checking for correct spelling, for double entries in the encyclopaedia or for plagiarisms. Findings of this kind lead to reproaching the original authors of blamable texts. Under certain conditions blamable activities are no longer performed after some time.
This paper presents a method for the evolution of SHI ABoxes which is based on a compilation technique of the knowledge base. For this the ABox is regarded as an interpretation of the TBox which is close to a model. It is shown, that the ABox can be used for a semantically guided transformation resulting in an equisatisfiable knowledge base. We use the result of this transformation to effciently delete assertions from the ABox. Furthermore, insertion of assertions as well as repair of inconsistent ABoxes is addressed. For the computation of the necessary actions for deletion, insertion and repair, the E-KRHyper theorem prover is used.
This paper describes the development of security requirements for non-political Internet voting. The practical background is our experience with the Internet voting within the Gesellschaft für Informatik (GI - Informatics Society) 2004 and 2005. The theoretical background is the international state-of-the-art of requirements about electronic voting, especially in the US and in Europe. A focus of this paper is on the user community driven standardization of security requirements by means of a Protection Profile of the international Common Criteria standard.
Distanzvektor-Routing-Protokolle sind Interior-Gateway-Protokolle, bei denen jeder Router anhand der Informationen, die er von seinen Nachbarn erhält, eine Routingtabelle mit den kürzesten Wegen und dazugehörigen Kosten zu allen anderen Routern des Netzwerks aufbaut. Distanzvektor-Routing-Protokolle sehen jedoch nur unzureichende Mechanismen vor, um die Sicherheit ihrer Operationen zu gewährleisten. Es wird vielmehr einfach davon ausgegangen, dass die Umgebung vertrauenswürdig ist. Router können sich aber aus verschiedenen Gründen böswillig verhalten und falsche Routingupdates einschleusen um das Routing zu manipulieren. Authentizität und Integrität der übermittelten Routinginformationen müssen daher sichergestellt werden; dabei soll eine Balance zwischen Nutzen und Performance gefunden werden.
Diese Arbeit untersucht verschiedene Lösungsansätze, die sich die Erfüllung dieser Anforderungen zum Ziel gesetzt haben, und stellt deren Vor- und Nachteile einander gegenüber.
This paper describes the robots TIAGo and Lisa used by
team homer@UniKoblenz of the University of Koblenz-Landau, Germany,
for the participation at the RoboCup@Home 2019 in Sydney,
Australia. We ended up first at RoboCup@Home 2019 in the Open Platform
League and won the competition in our league now three times
in a row (four times in total) which makes our team the most successful
in RoboCup@Home. We demonstrated approaches for learning from
demonstration, touch enforcing manipulation and autonomous semantic
exploration in the finals. A special focus is put on novel system components
and the open source contributions of our team. We have released
packages for object recognition, a robot face including speech synthesis,
mapping and navigation, speech recognition interface, gesture recognition
and imitation learning. The packages are available (and new packages
will be released) on http://homer.uni-koblenz.de.
This paper describes the robots TIAGo and Lisa used by team homer@UniKoblenz of the University of Koblenz-Landau, Germany, for the participation at the RoboCup@Home 2018 in Montreal, Canada. Further this paper serves as qualification material for the RoboCup-@Home participation in 2018. A special focus is put on novel system components and the open source contributions of our team. This year the team from Koblenz won the biggest annual scientianc robot competition in Montreal in the RoboCup@Home Open Platform track for the third time and also won the RoboCup@Home German Open for the second time. As a research highlight a novel symbolic imitation learning approach was demonstrated during the annals. The TIAGo robotic research platform was used for the first time by the team. We have released packages for object recognition, a robot face including speech synthesis, mapping and navigation, speech recognition interface via android and a GUI. The packages are available (and new packages will be released) on http://wiki.ros.org/agas-ros-pkg. Further information can be found on our project page http://homer.uni-koblenz.de.
This paper describes the robot Lisa used by team homer@UniKoblenz of the University of Koblenz Landau, Germany, for the participation at the RoboCup@Home 2017 in Nagoya, Japan. A special focus is put on novel system components and the open source contributions of our team. We have released packages for object recognition, a robot face including speech synthesis, mapping and navigation, speech recognition interface via android and a GUI. The packages are available (and new packages will be released) on
http://wiki.ros.org/agas-ros-pkg.
This paper describes the robot Lisa used by team
homer@UniKoblenz of the University of Koblenz Landau, Germany, for the participation at the RoboCup@Home 2016 in Leipzig, Germany. A special focus is put on novel system components and the open source contributions of our team. We have released packages for object recognition, a robot face including speech synthesis, mapping and navigation, speech recognition interface via android and a GUI. The packages are available (and new packages will be released) on http://wiki.ros.org/agas-ros-pkg.
The University of Koblenz-Landau would like to apply for participation in the RoboCup Mixed Reality League in Suzhou, China 2008. Our team is composed of ten team members and two supervisors. All members are graduate students of Computational Visualistics. Our supervisors are Ph.D. candidates currently researching in the working groups of artificial intelligence and computer graphics.
The paper is devoted to solving a problem of the development of the website of Russian municipal policlinics and provides a selection of a set of elements which should be posted on a website. Such elements are necessary to provide citizens with correct and ergonomic e-services. The insufficient development of an infrastructure of institutions of public and municipal administration (particularly, healthcare institutions) in Russia made it necessary to analyze webresources used in different countries at different levels of providing medical services. The information resources of medical treatment facilities of the United Kingdom, of the United Statesrnof America and of the Federal Republic of Germany were researched separately for three existing economic models of healthcare. A set of criteria for the assessment of medical webresources was developed.
API Migration bezeichnet den Wechsel einer benutzten API eines Programms in eine andere. Eine spezielle Form ist die sogenannte wrapper-basierte API Migration. In diesem Fall wird die API gewechselt, ohne das eigentliche Programm zu berühren. Sie wird unter Benutzung der neuen API reimplementiert. Dieser so genannte Wrapper besitzt das Interface der alten API, benutzt jedoch die Implementierung der neuen.
Dies ist ein interessanter Ansatz, da der Wrapper in jedem Programm eingesetzt werden kann, das bislang die alte API verwendet hat.
Um diesen Vorgang reproduzierbar zu machen, entwickeln wir eine ranking-basierte Methode, um einen Wrapper zu entwickeln. Hierbei implementieren wir abhängig von fehlschlagenden Testfällen immer die API-Methode mit der jeweils höchsten Priorität. So können wir jeden Implementierungssschritt rekonstruieren.
Im ersten Schritt entwickeln wir eine Infrastruktur, mit der wir Testsuites von Java-Projekten starten und messen können.
Mittels dieser Basis können wir nun die Ranking-Methode anweden, um einen Wrapper zu entwickeln.