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This thesis addresses the implementation of a particle simulation of an explosion. The simulation will be displayed via ray tracing in near real time. The implementation makes use of the openCL standard. The focus of research in this thesis is to analyse the performance of this combination of components.
Ordnung für die Prüfung im Bachelorstudiengang "Angewandte Naturwissenschaften" der Universität Koblenz-Landau
Ordnung für die Prüfung im Bachelorstudiengang und im Masterstudiengang Erziehungswissenschaft an der Universität Koblenz-Landau, Campus Landau
Gemeinsame Prüfungsordnung für die Bachelor- und Masterstudiengänge des Fachbereichs Informatik an der Universität Koblenz-Landau
Ordnung zur Aufhebung der Ordnung für die Diplomprüfung in Erziehungswissenschaften an der Erziehungswissenschaftlichen Hochschule Rheinland-Pfalz
Web-programming is a huge field of different technologies and concepts. Each technology implements a web-application requirement like content generation or client-server communication. Different technologies within one application are organized by concepts, for example architectural patterns. The thesis describes an approach for creating a taxonomy about these web-programming components using the free encyclopaedia Wikipedia. Our 101companies project uses implementations to identify and classify the different technology sets and concepts behind a web-application framework. These classifications can be used to create taxonomies and ontologies within the project. The thesis also describes, how we priorize useful web-application frameworks with the help of Wikipedia. Finally, the created implementations concerning web-programming are documented.
The paper deals with a specific introduction into probability propagation nets. Starting from dependency nets (which in a way can be considered the maximum information which follows from the directed graph structure of Bayesian networks), the probability propagation nets are constructed by joining a dependency net and (a slightly adapted version of) its dual net. Probability propagation nets are the Petri net version of Bayesian networks. In contrast to Bayesian networks, Petri nets are transparent and easy to operate. The high degree of transparency is due to the fact that every state in a process is visible as a marking of the Petri net. The convenient operability consists in the fact that there is no algorithm apart from the firing rule of Petri net transitions. Besides the structural importance of the Petri net duality there is a semantic matter; common sense in the form of probabilities and evidencebased likelihoods are dual to each other.
This paper critically examines the Google Calendar. For this purpose, the offered functions of the core product are studied on privacy aspects. On one hand, it is identified, to which extent the product could infringe the users" privacy, on the other accuring risks are discussed. Furthermore, the functions in terms of their use for both, the service provider Google and for the user, are considered. A detailed analysis demonstrates the critical aspects, in which we have to decide between privacy and functionality. The identified solutions to minimize discussed risks of IT security mechanisms, are presented, discussed and analyzed in terms of their feasibility. Afterwards the individual solutions are summarized in a security concept and other requirements are explained. Finally, a Firefox-Addon which implements the described solution concept should be created, to resolve the existing weaknesses to the best of its ability. Ultimately, the functionality of the addon with technical implementation is illustrated in detail.
In this master thesis some new helpful features will be added to the Spanning Tree Simulator. This simulator was created by Andreas Sebastian Janke in his bachelor thesis [Jan10b] in 2010. It is possible to visualize networks which are defined in a configuration file. Each of them is a XML representation of a network consisting of switches and hosts. After loading such a file into the program it is possible to run the Spanning Tree Algorithm IEEE 802.1D. In contrast to the previous version only the switches are implemented as threads. When the algorithm is finished a spanning tree is built. This means, that messages cannot run into loops anymore. This is important because loops can cause a total breakdown of the communication in a network, if the running routing protocols cannot handle loops.
Large and unknown data sets can be easily and systematically discovered by using faceted search. If implementing applications for smartphones, it needs to be considered that unlike desktop applications you can only use smaller screen sizes and there are limited possibilities for interaction between user and smartphone. These limitations can negatively influence the usability of an application. With FaThumb and MobileFacets, two mobile applications exist, which implement and use faceted search, although only MobileFacets is designed for current smartphones with touchscreen. However, FaThumb provides a novel facet navigation, which is newly realized in MFacets for present smartphones within this work.
Moreover, this work deals with the performance of a summative evaluation between both applications, MFacets and MobileFacets, with regards to usability and presents the evaluated results.
Particle swarm optimization is an optimization technique based on simulation of the social behavior of swarms.
The goal of this thesis is to solve 6DOF local pose estimation using a modified particle swarm technique introduced by Khan et al. in 2010. Local pose estimation is achieved by using continuous depth and color data from a RGB-D sensor. Datasets are aquired from different camera poses and registered into a common model. Accuracy and computation time of the implementation is compared to state of the art algorithms and evaluated in different configurations.
Development of an Android Application for the Recognition and Translation of Words in Camera Scenes
(2012)
This bachelor- thesis describes the conception and implementation of a translation software for the Android platform. The specific feature of the software is the independent text recognition based on the view of the camera. This approach aims to enhance and accelerate the process of translation in certain situations. After an introduction into text recognition, the underlying technologies and the operation system Android useful applications are described. Then the concept of the software is created and the implementation examined. Finally an evaluation is conducted to identify strengths and weaknesses of the software.
To assess the effect of organic compounds on the aquatic environment, organisms are typically exposed to toxicant solutions and the adverse effects observed are linked to the concentration in the surrounding media. As compounds generally need to be taken up into the organism and distributed to the respective target sites for the induction of effects, the internal exposure is postulated to best represent the observed effects.
The aim of this work is to contribute to an improved effect assessment of organic compounds by describing experimental and modelling methods to obtain information on the internal exposure of contaminants in organisms.
Chapter 2 details a protocol for the determination of bioconcentration parameter for uptake (k1) and elimination (k2) of organic compounds in zebrafish (Danio rerio) eggs. This enables the simulation of the internal exposure in zebrafish eggs from an ambient exposure concentration over time. The accumulated contaminant amount in zebrafish eggs was also determined, using a biomimetic extraction method. Different bioconc-entration estimation models for the determination of internal steady-state concentrat-ion of pharmaceutical compounds in fish to an environmental exposure are presented in Chapter 3. Bioconcentration factors were estimated from the compounds octanol: water partition coefficient (KOW) to determine the internal exposure to an ambient concentration.
To assess the integral bioavailable fraction from the water and sediment phase of environmental contaminants for rooted aquatic plants, the internal exposure in river-living Myriophyllum aquaticum plants were determined over time, presented in Chapter 4. The plants were collected at different time points, with the accumulated organic contaminants determined using a liquid extraction method.
In Chapter 5 a protocol was established to enable the non-invasive observation of effects in M. aquaticum plants exposed to contaminated sediments over time. Since the toxicant effects are a result of all uptake and distribution processes to the target site and the toxico-dynamic process leading to an observed effect during static exposure, information on the internal exposure could thus be gained from the temporal effect expression.rn
Die vorliegende Fallstudie entstand als Untersuchungsobjekt zu einer Bachelorarbeit und wurde nach der eXperience Fallstudienmethodik erstellt. Ziel der Bachelorarbeit war die Identifizierung von Nutzenaspekten in diesem konkreten Fall. Im Anwenderunternehmen DOCHOUSE wurde hier eine Schnittstelle zwischen dem internen CRM-System und einem kollaborativen System für den externen Zugriff eingeführt.
Ein besonderer Dank geht in diesem Zusammenhang an Herr Wolfgang Brugger (Geschäftsführer DOCHOUSE GmbH), der die Erstellung der Fallstudie motiviert hat und die FG BAS mit deren Durchführung betraute. Die Fallstudie wurde im Winter 2011 von dem Studenten Martin Surrey und Roland Diehl, wissenschaftlicher Mitarbeiter der Forschungsgruppe, erhoben.
The Multimedia Metadata Ontology (M3O) provides a generic modeling framework for representing multimedia metadata. It has been designed based on an analysis of existing metadata standards and metadata formats. The M3O abstracts from the existing metadata standards and formats and provides generic modeling solutions for annotations, decompositions, and provenance of metadata. Being a generic modeling framework, the M3O aims at integrating the existing metadata standards and metadata formats rather than replacing them. This is in particular useful as today's multimedia applications often need to combine and use more than one existing metadata standard or metadata format at the same time. However, applying and specializing the abstract and powerful M3O modeling framework in concrete application domains and integrating it with existing metadata formats and metadata standards is not always straightforward. Thus, we have developed a step-by-step alignment method that describes how to integrate existing multimedia metadata standards and metadata formats with the M3O in order to use them in a concrete application. We demonstrate our alignment method by integrating seven different existing metadata standards and metadata formats with the M3O and describe the experiences made during the integration process.
Standards are widely-used in the computer science and IT industry. Different organizations like the International Organization for Standardization (SO) are involved in the development of computer related standards. An important domain of standardization is the specification of data formats enabling the exchange of information between different applications. Such formats can be expressed in a variety of schema languages thereby defining sets of conformant documents. Often the use of multiple schema languages is required due to their varying expressive power and different kind of validation requirements.rnThis also holds for the Specification Common Cartridge which is maintained by the IMS Global Learning Consortium. The specification defines valid zip packages that can be used to aggregate different learning objects. These learning objects are represented by a set of files which are a part of the package and can be imported into a learning management system. The specification makes use of other specifications to constrain the contents of valid documents. Such documents are expressed in the eXtensible Markup Language and may contain references to other files also part of the package. The specification itself is a so-called domain profile. A domain profile allows the modification of one or more specifications to meet the needs of a particular community. Test rules can be used to determine a set of tasks in order to validate a concrete package. The execution is done by a testsystem which, as we will show, can be created automatically. Hence this method may apply to other package based data formats that are defined as a part of a specification.
This work will examine the applicability of this generic test method to the data formats that are introduced by the so called Virtual Company Dossier. These formats are used in processes related to public e-procurement. They allow the packaging of evidences that are needed to prove the fulfillment of criteria related to a public tender. The work first examines the requirements that are common to both specifications. This will introduce a new view on the requirements by introducing a higher level of abstraction. The identified requirements will then be used to create different domain profiles each capturing the requirements of a package based data format. The process is normally guided by supporting tools that ease the capturing of a domain profile and the creation of testsystems. These tools will be adapted to support the new requirements. Furtheron the generic testsystem will be modified. This system is used as a basis when a concrete testsystem is created.
Finally the author comes to a positive conclusion. Common requirements have been identified and captured. The involved systems have been adapted allowing the capturing of further types of requirements that have not been supported before. Furthermore the background of the specifications quite differ. This indicates that the use of domain profiles and generic test technologies may be suitable in a wide variety of other contexts.
The first group that was revised within my study is Ochralea Clark, 1865 (Hazmi & Wagner 2010a). I have checked the type specimen of most species that were originally described in Ochralea and there is no doubt that this genus is clearly distinct from Monolepta. Weise (1924) has synonymised Galeruca nigripes (Olivier, 1808) with O. nigricornis Clark, 1865 and the valid name of the species is O. nigripes (Olivier, 1808). Out of ten species originally described in this genus, only this species remain valid and O. pectoralis is a new synonym of O. nigripes. Additionally, Monolepta wangkliana Mohamedsaid, 2000 is very closely related to O. nigripes and need to be transferred to Ochralea. The second genus where the revision is still published is Arcastes Baly, 1865 (Hazmi & Wagner 2010b). I have checked the genitalic characters of A. biplagiata, and most of the type species of other Arcastes. Arcastes biplagiata possesses a peculiar shape of the median lobe and asymmetrically arranged endophallic structures. These peculiar characters are very useful to delimit this genus from the others. Therefore, only three valid species remain in Arcastes, while two new synonyms are found and fourrnother species need to be transferred to other genera. While checking the genitalic characteristics of type species of Arcastes sanguinea, thernmedian lobe as well as the spermatheca of this species possesses strong differences to A. biplagiata. The species was redescribed and transferred in a monotypic new genus Rubrarcastes Hazmi & Wagner, 2010c. The fourth genus that was already revised is Neolepta Jacoby, 1884. It was originally described on base of only two species by that time, N. biplagiata and N. fulvipennis. Jacoby has not designated a type species of the genus, and Maulik (1936) did it later, with the designation of N. biplagiata. Jacoby in his original description has only commented that Neolepta is very close and similar to Monolepta Chevrolat, 1837 and Candezea Chapuis, 1879. Subsequent authors have described further eight species, and transferred one species from Luperodes to it, summing up the total number of eleven described species in Neolepta. I have checked the genitalic characters of the type, N. biplagiata and have found out that the median lobe is not incised apically and stronger sclerotised ventral carinae with an apical hook close to the apex occur. Out of all described species, only two are closely related to the genero-type, N. sumatrensis (Jacoby, 1884) new combination and N. quadriplagiata Jacoby, 1886 that will remain in this group after the revision. All other species need to be transferred to other genera, including the newly described Paraneolepta and Orthoneolepta. The last distinct paper of this thesis presented the results on Monolepta Chevrolat, 1837. The massive number of Monolepta from the entire Oriental Region, with about 260 described species names is a more long-life project and not practicable within a PhD-study. Thus I have focused on the species of Monolepta known from the Sundaland area in this work. A comprehensive revision including the study of the primary types of the described species, has never been done for Monolepta from this sub-region, while new species have also been described in the last decade (e. g. Mohamedsaid 1993, 1997, 1998, 1999, 2000a,b, 2001, 2002, 2005).
On base of the most current species lists of Mohamedsaid (2001, 2004, 2005) and Kimoto (1990), the number of valid species described from this region is about 72. After my revision, only thirteen valid species can remain in Monolepta in the sense of the generotype M. bioculata (Wagner 2007), while seven species have been found as new synonyms, three have been already transferred to other genera and further 49 species need to be transferred to other genera.
In automated theorem proving, there are some problems that need information on the inequality of certain constants. In most cases this information is provided by adding facts which explicitly state that two constants are unequal. Depending on the number of constants, a huge amount of this facts can clutter the knowledge base and distract the author and readers of the problem from its actual proposition. For most cases it is save to assume that a larger knowledge base reduces the performance of a theorem prover, which is another drawback of explicit inequality facts. Using the unique name assumption in those reasoning tasks renders the introduction of inequality facts obsolete as the unique name assumptions states that two constants are identical iff their interpretation is identical. Implicit handling of non-identical constants makes the problems easier to comprehend and reduces the execution time of reasoning. In this thesis we will show how to integrate the unique name assumption into the E-hyper tableau calculus and that the modified calculus is sound and complete. The calculus will be implemented into the E-KRHyper theorem prover and we will show, by empiric evaluation, that the changed implementation, which is able to use the unique name assumption, is superior to the traditional version of E-KRHyper.
Regarding the rapidly growing amount of data produced every year and the increasing acceptance of Enterprise 2.0 enterprises have to care about the management of their data more and more. Content created and stored in an uncoordinated manner can lead to data-silos (Williams & Hardy 2011, p.57), which result in long search times, inaccessible data and in consequence monetary losses. The "expanding digital universe" forces enterprises to develop new archiving solutions and records management policies (Gantz et al. 2007, p.13). Enterprise Content Management (ECM) is the research field that deals with these challenges. It is placed in the scientific context of Enterprise Information Management. This thesis aims to find out to what extent current Enterprise Content Management Systems (ECMS) support these new requirements, especially concerning the archiving of Enterprise 2.0 data. For this purpose, three scenarios were created to evaluate two different kinds of ECMS (one Open Source - and one proprietary system) chosen on the basis of a short marketrnresearch. The application of the scenarios reveals that the system vendors actually face the industry- concerns: both tools provide functionality for the archiving of data arising from online collaboration and also business records management capabilities but the integration of those topics is not, or is only inconsistently solved. At this point new questions - such as, "Which datarngenerated in an Enterprise 2.0 is worth being a record?" - arise and should be examined in future research.
Dualizing marked Petri nets results in tokens for transitions (t-tokens). A marked transition can strictly not be enabled, even if there are sufficient "enabling" tokens (p-tokens) on its input places. On the other hand, t-tokens can be moved by the firing of places. This permits flows of t-tokens which describe sequences of non-events. Their benefiit to simulation is the possibility to model (and observe) causes and effects of non-events, e.g. if something is broken down.
Die Messung der Produktivität von Dienstleistungen ist trotz zunehmender Relevanz immer noch ein wenig durchdrungenes Forschungsfeld. Ursachen hierfür sind vor allem in den besonderen Merkmalen von Dienstleistungen - Immaterialität und Integrativität - zu suchen. Eine typische Dienstleistung der B2B Softwarebranche ist die Anpassung von Systemen an die Bedürfnisse des Kunden - das sogenannte Customizing. Die Ausschöpfung des Customizing-Potentials von Standardsoftware und -produkten und eine stärkere Einbeziehung des Kunden in Innovationsprozesse werden jedoch dadurch erschwert, dass die Produktivität dieser Dienstleistung nur unzureichend mess- und somit bewertbar zu sein scheint.
Der vorliegende Beitrag beschreibt die Entwicklung eines Modells zur Messung der Produktivität von Dienstleistungen auf der Basis unterschiedlicher Vorstudien im Rahmen des CustomB2B Projektes an der Universität Koblenz-Landau.
Cloud-Computing ist aktuell ein besonderer Trend in der IT-Branche. ERP-Systeme sind in den heutigen Unternehmen ebenfalls nicht mehr wegzudenken. Durch die Analyse ausgewählter Literatur wird aufgezeigt, dass Cloud-Computing als Betriebsmodell für ERP-Systeme besonderer Untersuchung bedarf, da beim Zusammenspiel dieser Technologien noch unterschiedliche Herausforderungen geklärt werden müssen. Darauf aufbauend werden mit Hilfe von drei verschiedenen Praxispartnern Fallstudien zu deren Cloud-ERP-Lösungen erstellt, um in einem nächsten Schritt die theoretische Literatur mit den praktischen Ergebnissen zu vergleichen.
Ziel dieser Arbeit ist es mit Hilfe der Forschungsfragen, differenzierte Nutzenaspekte von Cloud-ERP-Lösungen aufzudecken und zu erklären, wie die Theorie mit praktischen Erfahrungswerten von Experten übereinstimmt. Durch die Fallstudien wird deutlich, dass sich die drei unterschiedlichen Cloud-ERP-Anbieter vor allem durch den Umfang ihrer Software und die Unternehmensgrößen der Zielgruppen im Markt differenzieren. Zusätzlich zeigt sich im Analyseteil und Fazit der Arbeit, dass über die in der Theorie identifizierten Nutzenaspekte hinaus, zusätzliche Nutzenaspekte durch die Kombination von Cloud-ERP-Lösungen generiert werden können und dass es aktuell schon eine spezielle Zielgruppe für Cloud-ERP-Lösungen gibt. Für die Zukunft bleibt abzuwarten, wie sich der Cloud-ERP-Markt weiterentwickeln wird und welche weiteren Funktionalitäten in die Cloud ausgelagert werden können, sodass sich On-Demand ERP-Systeme zu einer Konkurrenz von On-Premise-Lösungen entwickeln können.
The goal of this Bachelor thesis is to implement and evaluate the "Simulating of Collective Misbelief"-model into the NetLogo programming language. Therefore, the model requirements have to be specified and implemented into the NetLogo environment. Further tool-related re-quirements have to be specified to enable the model to work in NetLogo. After implementation several simulations will be conducted to answer the research question stated above.
In dieser Ausarbeitung beschreibe ich die Ergebnisse meiner Untersuchungen zur Erweiterung des LogAnswer-Systemsmit nutzerspezifischen Profilinformationen. LogAnswer ist ein natürlichsprachliches open-domain Frage-Antwort-System. Das heißt: es beantwortet Fragen zu beliebigen Themen und liefert dabei konkrete (möglichst knappe und korrekte) Antworten zurück. Das System wird im Rahmen eines Gemeinschaftsprojekts der Arbeitsgruppe für künstliche Intelligenz von Professor Ulrich Furbach an der Universität Koblenz-Landau und der Arbeitsgruppe Intelligent Information and Communication Systems (IICS) von Professor Hermann Helbig an der Fernuniversität Hagen entwickelt. Die Motivation meiner Arbeit war die Idee, dass der Prozess der Antwortfindung optimiert werden kann, wenn das Themengebiet, auf das die Frage abzielt, im Vorhinein bestimmt werden kann. Dazu versuchte ich im Rahmen meiner Arbeit die Interessensgebiete von Nutzern basierend auf Profilinformationen zu bestimmen. Das Semantic Desktop System NEPOMUK wurde verwendet um diese Profilinformationen zu erhalten. NEPOMUK wird verwendet um alle Daten, Dokumente und Informationen, die ein Nutzer auf seinem Rechner hat zu strukturieren. Dazu nutzt das System ein sogenanntes Personal Information Model (PIMO) in Form einer Ontologie. Diese Ontologie enthält unter anderem eine Klasse "Topic", welche die wichtigste Grundlage für das Erstellen der in meiner Arbeit verwendeten Nutzerprofile bildete. Konkret wurde die RDF-Anfragesprache SPARQL verwendet, um eine Liste aller für den Nutzer relevanten Themen aus der Ontologie zu filtern. Die zentrale Idee meiner Arbeit war es nun diese Profilinformationen zur Optimierung des Ranking von Antwortkandidaten einzusetzen. In LogAnswer werden zu jeder gestellten Frage bis zu 200 potentiell relevante Textstellen aus der deutschen Wikipedia extrahiert. Diese Textstellen werden auf Basis von Eigenschaften (wie z.B. lexikalische Übereinstimmungen zwischen Frage und Textstelle) geordnet, da innerhalb des zur Verfügung stehenden Zeitlimits nicht alle Kandidaten bearbeitet werden können.
Mein Ansatz verfolgte das Ziel, diesen Algorithmus durch Nutzerprofile so zu erweitern, dass Antwortkandidaten, welche für den Benutzer relevante Informationen enthalten, höher in der Rangfolge eingeordnet werden. Zur Umsetzung dieser Idee musste eine Methode gefunden werden, um zu bestimmen ob ein Antwortkandidat mit dem Profil übereinstimmt. Da sich die in einer Textstelle enthaltenen Informationen in den meisten Fällen auf das übergeordnete Thema des Artikels beziehen, ohne den Namen des Artikels explizit zu erwähnen, wurde in meiner Implementierung der Artikelname betrachtet, um zu ermitteln, zu welchem Themengebiet die Textstelle Informationen liefert. Als zusätzliches Hilfsmittel wurde außerdem die DBpedia-Ontologie eingesetzt, welche die Informationen der Wikipedia strukturiert im RDF Format enthält. Mit Hilfe dieser Ontologie war es möglich, jeden Artikel in Kategorien einzuordnen, die dann mit den im Profil enthaltenen Stichworten verglichen wurden. Zur Untersuchung der Auswirkungen des Ansatzes auf das Ranking-Verfahren wurden mehrere Testläufe mit je 200 Testfragen durchgeführt. Die erste Testmenge bestand aus zufällig ausgewählten Fragen, die mit meinem eigenen Nutzerprofil getestet wurden. Dieser Testlauf lieferte kaum nutzbare Ergebnisse, da nur bei 29 der getesteten Fragen überhaupt ein Antwortkandidat mit dem Profil in Verbindung gebracht werden konnte. Außerdem konnte eine potentielle Verbesserung der Ergebnisse nur bei einer dieser 29 Fragen festgestellt werden, was zu der Schlussfolgerung führte, dass der Einsatz von Profildaten nicht für Anwendungsfälle geeignet ist, in denen die Fragen keine Korrelation mit dem genutzten Profil aufweisen.
Da die Grundannahme meiner Arbeit war, dass Nutzer in erster Linie Fragen zu den Interessensgebieten stellen, welche sich aus ihrem Profil ableiten lassen, sollten die weiteren Testläufe genau diesen Fall beleuchten. Dazu wurden 200 Testfragen aus dem Bereich Sport ausgewählt und mit einem Profil getestet, welches Stichworte zu unterschiedlichen Sportarten enthielt. Die Tests mit den Sportfragen waren wesentlich aussagekräftiger. Auch hier deuteten die Ergebnisse darauf hin, dass der Ansatz kein großes Potential zur Verbesserung des Rankings hat. Eine genauere Betrachtung einiger ausgewählter Beispiele zeigte allerdings, dass die Integration von Profildaten für bestimmte Anwendungsfälle, wie z.B. offene Fragen für die es mehr als eine korrekte Antwort gibt, durchaus zu einer Verbesserung der Ergebnisse führen kann. Außerdem wurde festgestellt, dass viele der schlechten Ergebnisse auf Inkosistenzen in der DBpedia-Ontologie und grundsätzliche Probleme im Umgang mit Wissensbasen in natürlicher Sprache beruhen.
Die Schlussfolgerung meiner Arbeit ist, dass der in dieser Arbeit vorgestellte Ansatz zur Integration von Profilinformationen für den aktuellen Anwendungsfall von LogAnswer nicht geeignet ist, da vor allem Faktenwissen aus sehr unterschiedlichen Domänen abgefragt wird und offene Fragen nur einen geringen Anteil ausmachen.
Robotics research today is primarily about enabling autonomous, mobile robots to seamlessly interact with arbitrary, previously unknown environments. One of the most basic problems to be solved in this context is the question of where the robot is, and what the world around it, and in previously visited places looks like " the so-called simultaneous localization and mapping (SLAM) problem. We present a GraphSLAM system, which is a graph-based approach to this problem. This system consists of a frontend and a backend: The frontend- task is to incrementally construct a graph from the sensor data that models the spatial relationship between measurements. These measurements may be contradicting and therefore the graph is inconsistent in general. The backend is responsible for optimizing this graph, i. e. finding a configuration of the nodes that is least contradicting. The nodes represent poses, which do not form a regular vector space due to the contained rotations. We respect this fact by treating them as what they really are mathematically: manifolds. This leads to a very efficient and elegant optimization algorithm.
Only little information is available about the diffusion of cloud computing in German higher educational institutions. A better understanding of the state of the art in this field would support the modernization of the higher educational institutions in Germany and allow the development of more adequate cloud products and more appropriate business models for this niche. For this purpose, a literature research on Cloud Computing and IT-diffusion will be run and an empirical investigation with an online questionnaire addressed to higher educational institutions in Germany will be performed to illustrate the state of the art of Cloud Computing in German higher educational institutions as well as the threats and opportunities perceived by employees of higher educational institutions data centers connected to the usage of the cloud.
In addition to that, different experts from universities and businesses will be interviewed to complete the knowledge and information collected through the online questionnaire and during the research phase. The expected results will serve to create a recommendation for higher educational institutions in Germany about either they should migration to the cloud or not and introduce a list of guiding questions of critical issues to consider before using cloud-computing technologies.
In der Diplomarbeit soll die Verwendung und Möglichkeit zur Einbindung eines Eyetrackers in der Bildersuche untersucht werden. Eyetracker sind Geräte zur Blickerfassung. Sie werden häufig in Design- und Usabilitystudien verwendet, um Informationen über den Umgang der Benutzer mit dem Produkt zu untersuchen. Seit einiger Zeit werden Augenbewegungen auch zur Erkennung von benutzerrelevanten Informationen und Bereichen verwendet, wie zum Beispiel bei dem Projekt Text 2.05 [4]. Hierbei werden Blickrichtung und -fixierung benutzt, um eine Interaktion mit dem Leser eines Textes auf eine möglichst einfache, dabei aber subtile Weise zu ermöglichen.
In this paper, we compare two approaches for exploring large,rnhierarchical data spaces of social media data on mobile devicesrnusing facets. While the first approach arranges thernfacets in a 3x3 grid, the second approach makes use of arnscrollable list of facets for exploring the data. We have conductedrna between-group experiment of the two approachesrnwith 24 subjects (20 male, 4 female) executing the same set ofrntasks of typical mobile users" information needs. The resultsrnshow that the grid-based approach requires significantly morernclicks, but subjects need less time for completing the tasks.rnFurthermore, it shows that the additional clicks do not hamperrnthe subjects" satisfaction. Thus, the results suggest thatrnthe grid-based approach is a better choice for faceted searchrnon touchscreen mobile devices. To the best of our knowledge,rnsuch a summative evaluation of different approaches for facetedrnsearch on mobile devices has not been done so far.
This Thesis deals with the state of Customer Relationship Management (CRM) in companies and the opportunities that are offered by these. The motivation for this thesis results from the request to classify the value of CRM. Furthermore, we want to do a research on how far a CRM-System is able to support and improve company processes. In addition, we want to get an overview of possible conditions that are linked with such a system. For the use case the motivation follows from the opportunity to optimize inefficient processes. As a result, this thesis tries to present perspectives which can improve company processes; moreover conduce to a bigger value creation.
This thesis covers in detail with customer-related processes of the company Alere and its quality in terms of the prospective implementation of a CRM-System. As there are only a few standard requirements for the processes, it is not possible to make a statement about process quality. These circumstances need a tool that is able to fulfil specified requirements. This gap shall be closed by a CRM-System. If we want to close this gap efficiently we first have to research the actual customer-related processes with the aim to specify the new system requirements.
The thesis shall deliver an insight into the topic with the goal to show the advantages of a CRM-System. Additionally, the identification of weak points, based on the use case and the motivation follows. With these data we will optimize the customer-related processes based on the CRM-System functions. Several departments of the company have contact with the customers. Because of this fact the focus lies on documentation, central data storage and loss-free communication between customers and staff and among the staff. The thesis shall deliver different results. First of all, a catalogue of requirements for the customer-related processes which bases on the basics.
Furthermore, the modelling of the customer-related processes. In addition a catalogue of the weak points of the customer related processes and after that a specification of requirements for the CRM-System to optimize the customer-related processes.
Finally the thesis shall generate the modelling of the optimized customer-related processes. The last result the thesis shall deliver is the discussion and conclusion.
New media are continually gaining importance in society. This process also has an increasing influence on developments in the field of education. Due to the use of computers as an integral part of schooling, new possibilities with regard to the organisation of learning processes arise. In this context, it is of great significance that appropriate computer applications for the respective learning group be prepared, so that justifiable use of computers in lessons can take place. Furthermore, efficient integration of computers requires changes in spatial organisation, in teaching methodology and in the role of the teacher. Such reflection and re-orientation are the essential basis for meaningful usage of new media in teaching and learning processes. An initial aim of this thesis is an empirical analysis of the situation regarding the usage of computers in geometry lessons in primary schools, based on a regional survey. The evaluation gives information as to how intensively the computer is used in the learning process and shows us which factors determine the use of computers in geometry lessons.
The results are an empirical foundation for the development of a computer-based learning environment called "Geolizi" (the second aim of my study). Within this learning environment, the pupils should work independently on the topics "mirror-imaged figures" and "the construction of rectangles and squares", with the help of the computer. During this process, hands-on media, traditional drawing instruments and interactive worksheets are available to the pupils. The computer (with its appropriate applications) takes over different functions in this learning process. Testing of this learning environment ("Geolizi") took place in several primary school classes, within the scope of formative and summative evaluation. With the help of questionnaires filled in by the pupils, the usability of the individual elements was tested. Based on a pre-post-investigation design, an attempt has been made to discover possible changes in the attitude of teachers regarding the usage of computers in the teaching of elementary geometry.
The results of this test phase, together with the evaluation of the questionnaires, lead to the founded presumption that usage of the multimedia-based learning environment " Geolizi " could result in greater use of computers in geometry lessons. All in all, the developed learning environment demonstrates an interesting possibility of how to use computers in the teaching of geometry at primary schools, thus making an important contribution to an independent, individualised learning process.
Im Rahmen dieser Arbeit wurde die Effizienz von Anfragen an OWL-Ontologien und Anfragen an TGraphen evaluiert. Dabei wurden die zwei unterschiedlichen Transformationsverfahren Schema-Aware Mapping und Simple Mapping getestet. Bei der Transformation einer OWL-Ontologie in einen TGraphen über Schema-Aware Mapping werden ein TGraph-Schema und ein TGraph erzeugt. Im Gegensatz zu Schema-rnAware Mapping besitzt Simple Mapping ein schon vordefiniertes TGraph-Schema, das für alle OWLOntologien anwendbar ist. Damit wird bei der Transformation einer OWL-Ontologie in einen TGraphen über Simple Mapping nur ein TGraph - kein TGraph-Schema - generiert. Mit den Verfahren wurden entsprechend auch SPARQL-Anfragen in GReQL-Anfragen transformiert.
Satzung der örtlichen Studentenschaft an der Universität Koblenz-Landau, Campus Koblenz.
Ordnung zur Änderung der Promotionsordnung des Fachbereiches 8: Psychologie der Universität Koblenz-Landau
Ordnung für die Prüfung im lehramtsbezogenen Zertifikatsstudiengang
(Erweiterungsprüfung) an der Universität Koblenz-Landau
Parallelmanipulatoren, welche den Stewartmechanismus nutzen, ermöglichen die präzise Ausführung von Aufgaben in einem begrenzten Arbeitsraum. Durch die Nutzung von sechs Freiheitsgraden wird eine hohe Flexibilität der Positionierung erreicht. Die robuste Konstruktion sorgt zudem für ein sehr gutes Verhältnis von Gewicht zu Nutzlast.
Diese Bachelorarbeit befasst sich mit der Entwicklung einer flexiblen Softwarelösung zur Ansteuerung einer Stewartplattform. Dies umfasst ein Modell der Plattform, welches zu Testzwecken dient. Es werden zunächst die mathematischen Grundlagen der Inversen Kinematik erarbeitet aufbauend auf einem zuvor definierten Bewegungsmodell. Es folgt die Entwicklung einer generischen Architektur zur Übermittlung und Auswertung von Steuerkommandos vom PC. Die Implementierung geschieht in C und wird in verschiedene Module aufgeteilt, welche jeweils einen Aufgabenbereich der Positionskontrolle oder der Hardwarekommunikation abdecken. Es wird zudem eine graphische Nutzeroberfläche vorgestellt, über die man die Position der Plattform manuell verändern kann. Eine automatische Ansteuerung wird im folgenden Anwendungsbeispiel beschrieben, wo die Plattform mit frequentiellen Beschleunigungswerten einer Achterbahnsimulation beliefert wird.
Aspect-orientation in PHP
(2012)
Diese Diplomarbeit hat das Thema der fehlenden Cross-Cutting-Concerns(CCCs)-Unterstützung in PHP zum Inhalt. Die Basis bilden zu definierende Anforderungen an eine AOP-Realisierung im PHP-Umfeld. Es wird analysiert, wie und ob verwandte Sprachen und Paradigmen es gestatten, CCCs zu unterstützen. Darüber hinaus wird die Möglichkeit erörtert, AOP in PHP ohne PHP-Erweiterung zu realisieren. Weiter werden die bisherigen Ansätze, AOP in PHP umzusetzen, qualitativ untersucht. Die vorliegende Arbeit zielt darauf ab, eine eigene AOP-PHP-Lösung zu präsentieren, die nicht die Schwächen existierender Lösungen teilt.
The objective of this contribution is to conceptually analyze the potentials of entrepreneurial design thinking as being a rather new method for entrepreneurship education. Based on a literature review of different design thinking concepts we carve out a generic design thinking model upon we conceptually build a new model that considers entrepreneurial thinking as a valuable characteristic.
The results of our work show that the characteristics of entrepreneurial design thinking can enhance entrepreneurship education by supporting respective action fields of entrepreneurial learning. In addition we reveal that entrepreneurial design thinking offers beneficial guidelines for the design of entrepreneurship education programs.
Integration von CRM-Systemen mit Kollaborations-Systemen am Beispiel von DocHouse und Lotus Quickr
(2012)
Der vorliegende Arbeitsbericht "Integration von CRM-Systemen mit Kollaborations-Systemen am Beispiel von DocHouse/ BRM und IBM Lotus Quickr" ist Ergebnis einer studentischen Projektarbeit. Ziel des Projekts war es Integrationsszenarien zwischen einem CRM-System und einem Kollaborati-onssystem zu erarbeiten und eine prototypische Schnittstelle mit entsprechender Funktion zwischen den Systemen DocHouse/ BRM und IBM Lotus Quickr zu implementieren.
Ein besonderer Dank geht in diesem Zusammenhang an Herr Wolfgang Brugger (Geschäftsführer der DocHouse GmbH), der die Idee einer solchen Entwicklung hatte und die FG BAS mit deren Durchführung betraute. Die Erstellung des Konzepts und des Prototyps wurde vom Winter 2010 bis Sommer 2011 von den Studenten Björn Lilge, Ludwig Paulsen, Marco Wolf, Markus Aldenhövel, Martin Surrey und Mike Reuthers im Rahmen ihres Projektpraktikums durchgeführt. Das Projektteam wurde bei der Konzeption und Implementierung inhaltlich und organisatorisch von Dipl.-Wirt.-Inform. Roland Diehl betreut.
The E-Government research area has gained in importance in Europe and specially Germany in the last few years, causing the number of researchers, institutes and publications to increase rapidly. This makes it difficult for outsiders to get an overview of the relevant actors in the E-Government field. This issue can be addressed by implementing a research map for the E-Government field, where all relevant actors and objects and their information are shown on the map according to their location. In order to give a complete overview, information which was valid at a certain time in the past needs to be available on the research map. This can be only achieved if the contents of the research map are historicized. This means that a new version of an object needs to be created and saved in the database, if changes occur to the object. Older versions need to be retained on the database, so that the user is able to navigate the website based on temporal information. Past experience has shown that the temporal aspects of historicization should be managed and planned during the conceptual phase of the website rather than during implementation. This Bachelor thesis proposes a concept for the E-Government research map which includes the modeling of relevant temporal dimensions needed to historicize the contents of the research map.
In dieser Arbeit wurde die Realisierung einer mobilen Sicherheitslösung für Überwachungszwecke vorgestellt, welche unter Zuhilfenahme des staatlich geförderten Forschungsprojekts CamInSens entwickelt wurde. CamInSens soll erreichen, in überwachten Gefahrenbereichen die erhaltenen Video- und Sensorendaten so zu analysieren, dass Bedrohungen möglichst frühzeitig erkannt und behandelt werden können. Das Ziel dieser Arbeit war, auf Basis von verarbeiteten Daten aus CamInSens eine Interaktion und Visualisierung zu entwickeln, die bei einem späteren Praxiseinsatz mobilem Sicherheitspersonal dabei hilft, in Bedrohungssituationen fundierte Entscheidungen treffen zu können. Zu diesem Zweck wurde nicht nur eine Software implementiert, sondern auch eine Marktsichtung hinsichtlich geeigneter Geräte und einsetzbarer Softwarebibliotheken durchgeführt.
Schema information about resources in the Linked Open Data (LOD) cloud can be provided in a twofold way: it can be explicitly defined by attaching RDF types to the resources. Or it is provided implicitly via the definition of the resources´ properties.
In this paper, we analyze the correlation between the two sources of schema information. To this end, we have extracted schema information regarding the types and properties defined in two datasets of different size. One dataset is a LOD crawl from TimBL- FOAF profile (11 Mio. triple) and the second is an extract from the Billion Triples Challenge 2011 dataset (500 Mio. triple). We have conducted an in depth analysis and have computed various entropy measures as well as the mutual information encoded in this two manifestations of schema information.
Our analysis provides insights into the information encoded in the different schema characteristics. It shows that a schema based on either types or properties alone will capture only about 75% of the information contained in the data. From these observations, we derive conclusions about the design of future schemas for LOD.
In this paper, we demonstrate by means of two examples how to work with probability propagation nets (PPNs). The fiirst, which comes from the book by Peng and Reggia [1], is a small example of medical diagnosis. The second one comes from [2]. It is an example of operational risk and is to show how the evidence flow in PPNs gives hints to reduce high losses. In terms of Bayesian networks, both examples contain cycles which are resolved by the conditioning technique [3].
Diese Masterarbeit beschreibt und evaluiert die im Rahmen der Arbeit entwickelten Erweiterungen zur Schellings Segregationsimulation. Der Nobelpreisträger Thomas C. Schelling simulierte als erster ab 1969 die Segregation. Die dabei entstandenen Ergebnisse erlaubten eine genauere Analyse der auftretenden Phänomene. Uri Wilensky, Mitarbeiter der "Northwestern University", entwickelte seit 1999 eine Segregationssimulation in NetLogo.
Im Rahmen meiner Masterarbeit habe ich das NetLogo-Model von Uri Wilensky in sechs unterschiedlichen Szenarien weiterentwickelt.
Virtual Goods + ODRL 2012
(2012)
This is the 10th international workshop for technical, economic, and legal aspects of business models for virtual goods incorporating the 8th ODRL community group meeting. This year we did not call for completed research results, but we invited PhD students to present and discuss their ongoing research work. In the traditional international group of virtual goods and ODRL researchers we discussed PhD research from Belgium, Brazil, and Germany. The topics focused on research questions about rights management in the Internet and e-business stimulation. In the center of rights management stands the conception of a formal policy expression that can be used for human readable policy transparency, as well as for machine readable support of policy conformant systems behavior up to automatic policy enforcement. ODRL has proven to be an ideal basis for policy expressions, not only for digital copy rights, but also for the more general "Policy Awareness in the World of Virtual Goods". In this sense, policies support the communication of virtual goods, and they are a virtualization of rules-governed behavior themselves.
In dieser Diplomarbeit wurde ein System entwickelt, dass eine Navigation für Fußgänger ermöglicht. Wie beabsichtigt wurde das System für die Benutzung auf einem iPhone realisiert.
Obwohl die Karten der neuen Generation vonNAVTEQ sich noch in Entwicklung befinden, konnten erste Eindrücke gesammelt werden, wie die Navigation der Fußgänger in Zukunft aussehen wird. Das System arbeitet aber auch mit Kartendaten von OpenStreetMap, die die klassische Repräsentation der Kartendaten haben. Die Positionierung kann später, wenn der Galileo-Empfänger zur Verfügung steht, umgestellt werden und Positionsdaten mit höherer Präzision für die Navigation bereitstellen. Die Routenberechnung konnte mit einem CH-ähnlichen Verfahren durch Vorberechnung beschleunigt werden und erlaubt trotzdem eine Änderung des Profils, ohne dass eine neue Vorberechnung nötig ist. Anders als beim einfachen CH, wo nach einer Änderung des Profils für die Berechnung der Routenkosten eine neue Vorberechnung nötig ist, die im Vergleich zu der Berechnung einer Route aufwendig ist. In Abbildung 8.1 ist die demonstrative Navigation mit dem fertigen System abgebildet. Diese zeigt eine Berechnung der Routen für 3 unterschiedliche Profile, die unterschiedliche Steigungsgrade bevorzugen. Daraus ergeben sich unterschiedliche Routen.
3D-Curve-Skeletons are often used, because the object surface repesentation is less complex and also needs less computing power in further processing, compared to the representation created by the Medial Axis Transformation introduced 1967 by Harry Blum.
This theses aims at developing a 3D curve skelton approximation algorithm that keeps these advantages and is also able to handle different scenarios of the object surface input data.
Ziel dieser Diplomarbeit ist es, innerhalb von sechs Monaten eine gamebasierte Anwendung für Android-Smartphones zu entwickeln, die durch eng beieinander liegende Stationen historisches Wissen vermittelt. Die einzelnen Spielstationen sollen mit Hilfe von GPS1-Positionen festgelegt und erkannt werden. Als Gelände wurde die Burgruine Reichenstein in der Verbandsgemeinde Puderbach im Westerwald ausgewählt. Es soll untersucht werden, wie viele GPS-Stationen auf engem Raum unterzubringen sind und wie weit sie voneinander entfernt sein müssen, um gute Ergebnisse erzielen zu können. Dazu ist es nötig, sowohl den Grundriss der Burg als auch die Beschaffenheit des Geländes mit einzubeziehen.
An den einzelnen Stationen sollen auf spielerische Art und Weise historische Informationen über die Burgruine Reichenstein vermittelt werden. Neben der Recherche, der Konzepterstellung und der Implementierung umfasst diese Arbeit auch eine Evaluation, die eine Bewertung der Anwendung ermöglicht.
The purpose of this master thesis is to enable the Robot Lisa to process complex commands and extract the necessary information in order to perform a complex task as a sequence of smaller tasks. This is intended to be achieved by the improvement of the understanding that Lisa has of her environment by adding semantics to the maps that she builds. The complex command itself will be expected to be already parsed. Therefore the way the input is processed to become a parsed command is out of the scope of this work. Maps that Lisa builds will be improved by the addition of semantic annotations that can include any kind of information that might be useful for the performance of generic tasks. This can include (but not necessarily limited to) hierarchical classifications of locations, objects and surfaces. The processing of the command in addition to some information of the environment shall trigger the performance of a sequence of actions. These actions are expected to be included in Lisa- currently implemented tasks and will rely on the currently existing modules that perform them.
Nevertheless the aim of this work is not only to be able to use currently implemented tasks in a more complex sequence of actions but also make it easier to add new tasks to the complex commands that Lisa can perform.