Bachelor Thesis
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Institute
- Fachbereich 4 (57) (remove)
Usability experts conduct user studies to identify existing usability problems. An established method is to record gaze behavior with an eye-tracker. These studies require a lot of effort to evaluate the results. Automated recognition of good and bad usability in recorded user data can support usability experts in eye tracking evaluation and reduce the effort. The objective of that bachelor thesis is to identify suitable eye-tracking metrics that correlate with the quality of usability. For this purpose, the central research question is answered: Which eye-tracking metrics correlate with the quality of a web form’s operation? To answer the research question, a quantitative A/B-user-study with eye-tracking was conducted and recorded the
gaze behavior of 30 subjects while filling out the web form. The web form was designed, that each web form page was available as a good and bad variant according to known usability guidelines. The results confirm a significant correlation between the eye-tracking-metric "number of visits to an
AOI" and the quality of the operation of a web form. The eye-tracking-metrics
"number of fixations within an AOI" and "duration of fixations within an AOI" also correlate with the quality of usability. No correlation could be confirmed for the "time of the first fixation within an AOI".
Mit der rasant fortschreitenden Entwicklung von Informatiksystemen und Algorithmen ist die Erfassung und Verarbeitung von Daten in immer größeren Umfang möglich. Verschiedene Initiativen haben sich dadurch motiviert zur Aufgabe gemacht, über die daraus resultierenden Gefahren für die Persönlichkeitsrechte und die Meinungsfreiheit aufzuklären. Dies soll einen bewussteren Umgang mit personenbezogenen Daten zur Folge haben. Zum Schutz der Grundrechte bedarf es aufgeklärter und informierter Nutzer, diese Aufgabe können die Initiativen allerdings nicht alleine leisten. Die staatlichen Bildungseinrichtungen und besonders die Schulen, stehen hier in der Pflicht sich an der Lösung des Problems zu beteiligen. Um ihrem Bildungsauftrag im vollen Ausmaß gerecht zu werden, bedarf es struktureller Änderungen, wie der Änderung von Lehrplänen. Solange diese allerdings nicht erfolgt sind, muss in und mit den gegebenen Strukturen gearbeitet werden. Eine Plattform dafür bietet der schulische Informatikunterricht.
Die vorliegende Arbeit stellt eine Unterrichtsreihe zur Behandlung von Datenschutz und Datensicherheit vor. Es wurde dabei ein kontextorientierter Ansatz nach Vorbild von Informatik im Kontext gewählt. Die Reihe Smartphone-Applikationen beinhaltet über die genannten primären Themen der Unterrichtsreihe hinaus weitere Dimensionen, die bei der Nutzung von Smartphones auftreten. Durch den direkten Bezug zum Alltag der Schüler soll dabei eine möglichst hohe Betroffenheit erzeugt werden. Dadurch sollen die Schüler ihr bisheriges Nutzungsverhalten überdenken und im besten Fall ihren Altersgenossen als Vorbilder dienen. Die Prüfung der Durchführbarkeit der Reihe im Unterricht steht noch aus. Diese war im Rahmen dieser Arbeit, begründet durch die begrenzte Bearbeitungszeit, nicht zu leisten.
Die Arbeit stellt Path Tracing zum Rendern von Bildern mitrnglobaler Beleuchtung vor. Durch die Berechnung der Rendergleichung, mithilfe von Zufallsexperimenten, ist das Verfahren physikalisch plausibel. Entscheidend für die Qualität der Ergebnisse ist Sampling. Der Schwerpunktrnder Arbeit ist die Untersuchung verschiedener Samplingstrategien. Dazu werden die Ergebnisse unterschiedlicher Dichtefunktionen verglichenrnund die Methoden bewertet. Außerdem werden Effekte, wie beispielsweise Depth of Field, mittels Sampling visualisiert.
Die vorliegende Arbeit befasst sich mit der volkswirtschaftlichen Untersuchung von Arbeit in virtuellen Welten und hat als Kerninhalt die Analyse des Arbeitsmarktes in "Massively Multiplayer Online Role-Playing Games" (MMORPGs). Als Ausgangsbasis diente zum einen der Faktor Arbeit in der Realität, zum anderen wurden zusätzliche Besonderheiten von MMORPGs in die Betrachtung miteinbezogen, woraus sich ein Gesamtbild des virtuellen Arbeitsmarkts ergab, aus dem sich relevante Indikatoren ableiten ließen. Neben dem grundsätzlichen Befund der Existenz eines virtuellen Arbeitsmarktes, wurden Ähnlichkeiten zum realen Arbeitsmarkt deutlich. So war es möglich virtuelle Stundenlöhne zu berechnen, unternehmensähnliche Strukturen in Spielergruppierungen nachzuweisen und ausgehend von der Humankapitaltheorie, eine modifizierte Theorie ("Avatarkapital") für virtuelle Welten zu ermitteln. Allerdings ergaben sich auch Unterschiede, so ist die Komplexität der Herstellungsprozesse in den untersuchten MMORPGs in der Regel weitaus geringer als in der Realität. Durch eine Gegenüberstellung von Motivationsfaktoren in beiden Arbeitswelten wurden weiterhin Gemeinsamkeiten, aber auch Unterschiede festgestellt und dargelegt. Zusätzlich wurde aufgezeigt, dass das aktuell diskutierte Thema Mindestlohn auch in virtuellen Arbeitsmärkten von MMORPGs anzutreffen ist und als Spielmechanik implementiert wurde, um Motivation durch andauernde Beschäftigung zu gewährleisten. Über diese Parallelen hinaus, wurde anhand einer Analyse von Waren- und Geldtransaktionen (Real-Money-Trading) zwischen Virtualität und Realität eine Verbindung beider Welten nachgewiesen, die beide Arbeitsmärkte gleichermaßen betrifft. Neben der theoretischen Untersuchung, war es auch Ziel eigene Beobachtungen und Ansätze in die Ergebnisse einfließen zu lassen. Besonders in der abschließenden empirischen Untersuchung war es somit möglich weitere Faktoren zu entdecken, die nicht ausreichend aus der Theorie heraus zu ermitteln waren. Vor allem weitere Erkenntnisse zum Thema Produktivitätsmessung in virtuellen Welten konnten so aus der Praxis in die Theorie einfließen. Schlussendlich wurde aber auch deutlich, dass sich die Untersuchungen zum Thema Arbeitsmarkt in virtuellen Welten noch in einem frühen Stadium befinden und zahlreiche Forschungsobjekte in diesem Bereich existieren, die mit Sicherheit zu einem Erkenntnisgewinn in der Volkswirtschaftslehre führen.
The Microsoft Kinect is currently polular in many application areas because ofrnthe cheap price and good precission. But controlling the cursor is unapplicablerndue to jitter in the skeletton data. My approach will try to stabilisize the cursor position with common techniques from image processing. The input therefore will be the Kinect color camera. A final position will be calculated using the different positions of the tracking techniques. For controlling the cursor the right hand should be tracked. A simple click gesture will also be developed. The evaluation will show if this approach was succesfull.
Polsearchine: Implementation of a policy-based search engine for regulating information flows
(2013)
Many search engines regulate Internet communication in some way. It is often difficult for end users to notice such regulation, as well as obtaining background information for it. Additionally, the regulation can usually be circumvented easily. This bachelor thesis presents the prototypical metasearch engine "Polsearchine" for addressing these weaknesses. Its regulation is established through InFO, a model for regulating information flows developed by Kasten and Scherp. More precisely, the extension for regulating search engines SEFCO is being used. For retrieving search results, Polsearchine uses an external search engine API. The API can be interchanged easily to make this metasearch engine independent from one specific API.
Die weltweite Zugänglichkeit und umfangreiche Nutzung des Internets machen dieses Medium zu einem effizienten und beliebten Informations-, Kommunikations-, und Verkaufsinstrument. Immer mehr Menschen und Organisationen versuchen, diese Vorzüge durch eine eigene Website für ihre Zwecke zu verwenden. Als hilfreiches Mittel zur Optimierung von Webpräsenzen bewährte sich in den letzten Jahren der Einsatz von Web-Analytics-Software. Durch diese Software sind Websitebetreiber in der Lage, Informationen über die Besucher ihrer Website und deren Nutzungsverhalten zu sammeln und zu messen. Das angestrebte Resultat sind Optimierungsentscheidungen auf Basis von Daten an Stelle von Annahmen und wirkungsvolle Testmöglichkeiten.
Für den Bereich des E-Commerce existieren bis dato zahlreiche wissenschaftliche und praxiserprobte Hilfestellungen für Web-Analytics-Projekte. Informationswebsites hingegen werden trotz ihrer Wichtigkeit nur vereinzelt thematisiert. Um diesem Defizit entgegenzuwirken, hat Hausmann 2012 das Framework for Web Analytics entwickelt, welches dem Anwender ein hilfreiches Referenzmodell für sein Web Analytics-Vorhaben bietet. Diesen Ansatz weiter voranzutreiben ist das Ziel der Abschlussarbeit. Dazu wird mithilfe einer Literaturanalyse und einer Fallstudie das Framework validiert und ergänzt, sowie weitere Handlungsempfehlungen identifiziert. Als Ergebnis werden die wichtigsten Erkenntnisse dieser Forschung zusammengefasst und für den zukünftigen Gebrauch festgehalten.
In this thesis we discuss the increasingly important routing aggregation and its consequences on avoiding routing loops. As basis for implementation and evaluation I will use the RMTI protocol, developed at the University of Koblenz, which is an evolution of the RFC2453 specified in the Routing Information Protocol version 2. The virtual network environment Virtual Network User Mode Linux (VNUML) is used within this thesis as environment. With VNUML it is possible to operate and evaluate real network scenarios in a virtual environment. The RMTI has already proven its ability to detect topological loops and thereby prevent the formation of these routing loops. In this thesis we will describe the function of the RMTI and then discuss under which circumstances we can use routing aggregation, without it resulting in routing anomalies. In order to implement these changes it is essential to have a deeper understanding of the structure of routing tables, so the construction will be explained using reference to examples. There follows a description of which points have to be changed, in the RMTI in order to avoid loops despite aggregation. In Summary we will evaluate the affect the routing aggregation has on the reorganization ability of the virtual network.
Recipients" youtube comments to the five most successful songs of 2011 and 2012 are tested for nostalgic content. These nostalgic relevant comments are analyzed by content and finally interpreted. It shall be found out, whether nostalgic music content is a factor for success. By using the uses and gratifications theory the recipients" purpose of consuming nostalgic-evoking music will be identified. Music is a clearly stronger trigger for evoking nostalgia than the music video whereas nostalgia triggers positive and/or negative affect. Furthermore personal nostalgia is much more evident than historical nostalgia. Moreover the lyrics have a considerably higher potential to elicit nostalgia than any other song units. Persons and momentous events are the most frequent objects in personal nostalgic reverie. The purpose of consuming nostalgic music is the intended evocation of positive and/or negative affect. Hence nostalgia in music seems to satisfy certain needs and it can be assumed that nostalgia is a factor of success in music industry.
Infinite worlds
(2013)
This work is concerned with creating a 2D action-adventure with roleplay elements. It provides an overview over various tasks of the implementation. First, the game idea and the used gamemechanism are verified and a definfinition of requirements is created. After introducing the used framework, the software engineering concept for realization is presented. The implementation of control components, game editor, sound and graphics is shown. The graphical implementation pays special attention to the abstraction of light and shadow into the 2D game world.
Due to the increasing pervasiveness of the mobile web, it is possible to send and receive mails with mobile devices. Content of digital communication should be encrypted to prevent eavesdropping and manipulation. Corresponding procedures use cryptographic keys, which have to be exchange previously. It has to be ensured, that a cryptographic key really belongs to the person, who it is supposedly assigned to. Within the scope of this thesis a concept for a smartphone application to exchange cryptographic keys was designed. The concept consists of a specification of a component-based framework, which can be used to securely exchange data in general. This framework was extended and used as the basis for a smartphone application. The application allows creating, managing and exchanging cryptographic keys. The Near Field Communication is used for the exchange. Implemented security measures prevent eavesdropping and specific manipulation. In the future the concept and the application can be extended and adjusted to be used in other contexts.
Geschäftsprozessmanagement (GPM) gilt in der heutigen Unternehmensentwicklung als einer der wichtigsten Erfolgsfaktoren und wird von modernen Unternehmen auch als solcher wahrgenommen [vgl. IDS Scheer 2008]. Bereits 1993 waren Geschäftsprozesse für Hammer und Champy der zentrale Schlüssel zur Reorganisation von Unternehmen [vgl. Hammer, Champy 1993, S. 35]. Den Paradigmenwechsel von der Aufbau- zur Ablauforganisation und letztendlich zur etablierten "Prozessorganisation" wurde von Gaitanides schon 1983 erstmals beschrieben [vgl. Gaitanides 2007].
Trotz einer breiten und tiefen Behandlung des Themengebiets "Geschäftsprozessmanagement" in der wissenschaftlichen Literatur, gestaltet es sich schwierig, einen schnellen Überblick in Bezug auf Vorgehensweisen zur Einführung von Geschäftsprozessmanagement zu erhalten. Dies ist im Wesentlichen der Tatsache geschuldet, dass in der Literatur "Geschäftsprozessmanagement" in unterschiedlichen wissenschaftlichen Bereichen wie z.B. der Organisationslehre [vgl. z.B. Vahs 2009; Schulte-Zurhausen 2005], der Betriebswirtschaft [vgl. z.B. Helbig 2003; Schmidt 2012] oder der Informatik bzw. Wirtschaftsinformatik [vgl. z.B. Schmelzer, Sesselmann 2008; Schwickert, Fischer 1996] behandelt und der Aufbau eines GPMs anhand unterschiedlicher Themenschwerpunkte beschrieben wird. Insbesondere gestaltet sich die Suche nach Literatur zu Geschäftsprozessmanagement speziell für kleine und mittlere Unternehmen (KMU) und zu Einführungsmethoden von BPM in KMU als schwierig. Die Kombination "Vorgehensweisen zur Einführung von Geschäftsprozessmanagement bei KMU" ist in der wissenschaftlichen Literatur nicht aufzufinden. Mit der vorliegenden Arbeit soll ein erster Ansatz geschaffen werden, diese Lücke zu schließen. Diese Arbeit zielt darauf ab, anhand einer Auswahl von Vorgehensweisen zur Einführung von Geschäftsprozessmanagement deren charakteristische Eigenschaften zu analysieren und einander gegenüberzustellen. Zudem erfolgt eine Bewertung auf die Anwendbarkeit einzelner Vorgehensweisen auf kleine und mittlere Unternehmen anhand zuvor erhobener, für KMU wichtiger Anforderungen an BPM und dessen Einführung.
Auf Basis der dieser Arbeit zugrundeliegenden Bewertungskriterien schneidet die Vorgehensweise nach Schulte-Zurhausen im Gesamtergebnis am besten ab. Dennoch ist festzustellen, dass jede der untersuchten Vorgehensweisen Stärken und Schwächen bzgl. der Eignung für ein KMU aufweist. Dies hat zur Folge, dass bei der Einführung eines Geschäftsprozessmanagements jede der untersuchten Vorgehensweisen einer Anpassung und Adaption auf die Situation eines KMUs bedarf. Aus diesem Grund empfiehlt der Autor dieser Arbeit einem KMU, eine Vorgehensweise als grundlegende Vorgehensweise der Einführung festzulegen (in diesem Fall die Vorgehensweise nach Schulte-Zurhausen) und diese durch jeweils geeignete Aspekte der weiteren Vorgehensweisen anzureichern bzw. zu vervollständigen.
Augmented Reality (AR) is getting more and more popular. To augment information into the field of vision of the user using HMDs, e.g. front shields of a car, glasses, displays of a smartphone or tablets are the main use of AR technology. It is necessary to get the position and orientation (pose) of the camera in space to augment correctly.
Nowadays, this is solved with artificial markers. These known markers are placed in the room and the system is taught to this set up. The next step is to get rid of these artificial markers. If we are calculating the pose without such markers we are talking about marker-less tracking. Instead of artificial markers we will use natural objects in the real world as reference points to calculate the pose. Thus, this approach can be used flexibly and dynamically. We are no longer dependent on artificial markers but we need much more knowledge about the scenery to find the pose. This is compensated by technical actions and/or the user himself. However, both solutions are neither comfortable nor efficient for the usage of such a system. This is why marker-less 3D tracking is still a big field of research.
This sets the starting point for the bachelor thesis. In this thesis an approach is proposed that needs only a quantity of 2D Feature from a given camera image and a quantity of 3D Feature of an object to find the initial Pose. With this approach, we got rid of the technical and user assistance. 2D and 3D Features can be detected in any way you like.
The main idea of this approach is to build six correspondences between these quantities. With those we are able to estimate the pose. Each 3D Feature is mapped with the estimated pose onto image coordinates, whereby the estimated pose can be evaluated. Each distance is measured between the mapped 3D Feature and the associated 2D Feature. Each correspondency is evaluated and the results are summed up to evaluate the whole pose. The lower this summed up value is, the better the pose. It has been shown to have a correct pose with a value around ten pixels.
Due to lots of possibilities to build six correspondences between the quantities, it is necessary to optimize the building process. For the optimization we will use a genetic algorithm.
During the test case the system worked quite reliably. The hit rate was around 90% with a runtime of approximately twelve minutes. Without optimization it can take easily some years.
Diese Bachelor-Thesis beschäftigt sich mit der Entwicklung eines Programms, welches den Zahnarzt durch die AR bei seiner Behandlung am Patienten unterstützen soll. Um eine angemessene theoretische Grundlage zu schaffen, wird zunächst der aktuelle Stand der Technik erläutert, der für dieses Projekt relevant ist. Daraufhin werden mögliche zukünftige Technologien vorgestellt, welche die hypothetische Basis dieser Arbeit darstellen. In dem darauffolgenden Unterkapitel wird die Auswahl der Systeme erläutert, die für dieses Projekt verwendet wurden. Der Hauptteil beschäftigt sich zunächst mit dem Vorgehen in der Vorbereitungs- und Planungsphase, um daraufhin den Programmablauf der Applikation sukzessiv vorzustellen. Dabei wird auch auf die Probleme eingegangen, die während des Programmierens entstanden sind. In dem reflektierenden Auswertungsteil werden Verbesserungsvorschlägen und Zusatzfunktionen für das geschriebene Programm präsentiert.
This bachelor thesis deals with the concept of a smartphone application for emergencies. It describes the basic problem and provides a conceptual approach.
The core content of this thesis is a requirement analysis of the newly to be designed emergency application. Furthermore the functional and non-functional requirements such as usability are specified to give insights for the concept of the application. In addition, single sub-functions of the mHealth applications of the University Koblenz which exists or are still under construction can be integrated in the future emergency application. Based on the catalog of requirements a market analysis for strengths and weaknesses of existing emergency application systems is realized. In the to-be concept the findings were summarized and possible architectural sketches for future emergency applications were given. Furthermore, one conclusion of dealing with this topic is that a design alone is not sufficient to guarantee a good working app. That is why the requirements for the thesis were expanded by the connection to and integration of rescue centers in the architecture of the emergency app.
At the end of the thesis, the reader will receive a comprehensive overview of the provision of emergency data to the rescue control centers by different transmission channels. Furthermore, conditions for the system requirements are also presented as possible scenarios of the architecture of the whole system of the emergency application. The generic and modular approach guarantees that the system is open for future development and integration of functions of other applications.
The goal of this Bachelor thesis was programming an existig six-legged robot, which should be able to explore any environment and create a map of it autonomous. A laser scanner is to be integrated for cognition of this environment. To build the map and locate the robot a suitable SLAM(Simultaneous Localization and Mapping) technique will be connected to the sensor data. The map is reported to be the robots base of path planning and obstancle avoiding, what will be developed in the scope of the bachelor thesis, too. Therefore both GMapping and Hector SLAM will be implemented and tested.
An exploration algorithm is described in this bachelor thesis for exploring the robots environment. The implementation on the robot takes place in the space of ROS(Robot Operating System) framework on a "Raspberry Pi" miniature PC.
A Kinect device has the ability to record color and depth images simultaneously. This thesis is an attempt to use the depth image to manipulate lighting information and material properties in the color image. The presented method of lighting and material manipulation needs a light simulation of the lighting conditions at the time of recording the image. It is used to transform information from a new light simulation directly back into the color image. Since the simulations are performed on a three-dimensional model, a way is searched to generate a model out of single depth image. At the same time the text will react to the problems of the depth data acquisition of the Kinect sensor. An editor is designed to make lighting and material manipulations possible. To generate a light simulation, some simple, real-time capable rendering methods and lighting modells are proposed. They are used to insert new illumination, shadows and reflections into the scene. Simple environments with well defined lighting conditions are manipulated in experiments to show boundaries and possibilities of the device and the techniques being used.
This thesis describes the conception, implementation and evaluation of a collaborative multiplayer game for preschoolers for mobile devices.
The main object of this thesis is to find out, if mobile devices like smartphones and tablet computers are suitable for the interaction of children. In order to develop this kind of game relevant aspects were researched. On this basis a game was designed which was finally tested by preschoolers.
Customization is a phenomenon which was introduced quite early in information systems literature. As the need for customized information technology is rising, different types of customization have emerged. In this study, customization processes in information systems are analyzed from a perspective based on the concept of open innovation. The objective is to identify how customization of information systems can be performed in an open innovation context. The concept of open innovation distinguishes three processes: Outside-in process, inside-out process and coupled process. After categorizing the selected journals into three core processes, the findings of this analysis indicated that there is a major concentration on outside-in processes. Further research on customization in coupled and inside-out processes is recommended. In addition, the establishment of an extensive up-to-date definition of customization in information systems is suggested.
This bachelor thesis deals with the topic "user-friendly design of applications (apps)" on mobile devices, a subdomain of software-ergonomics. In the process, two applications are being analyzed with the aim of developing a solution on how support on a mobile device should be conducted. This study focuses primarily on appropriate gestures to coordinate the 'help function' on a mobile device. The study results show that the test persons request a customized help function, but reject an extensive help description, as this seems to be overwhelming for the user.
The purpose of this bachelor- thesis is to teach Lisa - a robot of the university of Koblenz- AGAS department developed for participation in the @home league of the RoboCup - to draw. This requires the expansion of the robbie software framework and the operation of the robot- hardware components. Under consideration of a possible entry in the Open Challenge of the @home RoboCup, the goals are to detect a sheet of paper using Lisa- visual sensor, a Microsoft Kinect and draw on it using her Neuronics Katana robot arm. In addition, a pen mounting for the arm- gripper has to be constructed.
Outlined within this thesis are the procedures utilized to convert an image template into movement of the robotic arm, which in turn leads to drawing of a painting by the pen attached to the arm on a piece of paper detected by the visual sensor through image processing. Achieved were the parsing and drawing of an object made up of an indefinite amount of straight lines from a SVG-file onto a white sheet of paper, detected on a slightly darker surface and surrounded by various background objects or textures.
Das Vertrauen von jungen Erwachsenen in politische Beiträge aus Rundfunk, Print- und Digitalmedien
(2013)
Die Kernfrage dieser Bachelorarbeit ist, ob das Vertrauen in Medien auf die politische Einstellung wirkt und ob Mediennutzung auf diese Wirkungsrichtung Einfluss nimmt. Hierbei werden sowohl Mediengattungen als auch einzelne Medienformate differenziert betrachtet. Die politische Einstellung wird anhand der Einstellungsdimensionen Effektivität der Regierung, Legitimität der Regierung, Einflussüberzeugung, Responsivität der politischen Akteure und Integrität der politischen Akteure operationalisiert. Hierbei wird der Fokus auf junge Erwachsene gelegt, welchen verbreitet Politikverdrossenheit nachgesagt wird.
Zur Prüfung des Zusammenhangs zwischen Medienvertrauen und der politischen Einstellung wird eine quantitative Online-Befragung der Studenten/ Studentinnen der Universität Koblenz (N = 496) durchgeführt. Zur Datenauswertung werden Regressionsanalysen sowie die ANOVA angewandt. Die Ergebnisse weisen nicht auf eine allgemeine negative politische Grundhaltung junger Erwachsenen hin. Zudem indizieren die Resultate, dass das Vertrauen in Medien einen signifikanten Effekt auf die politische Einstellung hat (p ≤ .05). Mediennutzung hat hingegen unzureichende Erklärungskraft. Auch in zukünftigen Studien würde es sich anbieten, das Medienvertrauen als zentrale unabhängige Variable zu untersuchen, wobei ein Generationenvergleich unterschiedlicher Bildungsschichten empfehlenswert wäre.
In this thesis, a first prototype of a mobile instruction device with mixed reality (MR) funktionality is developed. This system shall be capable to support training on the job through interaction with the work item. The concept corresponds to a didactic approach presented by Martens-Parree that combines constructivism with situated learning. As an application example, the training of glider pilots checked out on a new type was chosen. Whether the MR device could increase the competence, or facilitiate the completion of certain tasks, was examined in a survey with fifteen testers. The results of the study show that in general, the didactic approach of Martens-Parree is valid. While an increase in fact knowledge has been observed, it was not (yet) possible to demonstrate an increase in skills with respect to the work tasks.
This study investigates crowdfunding, a new form of financing projects. In the past years more and more crowdfunding platforms emerged. The main question is if crowdfunding is able to compete with the traditional types of financing social projects. The history and development of crowdfunding is presented in this paper. The different crowdfunding models are explained. An overview of German crowd funding platforms is presented. Based on successful social crowdfunding projects a list of key success factors is listed and described. In a case study a concept for financing a social project through crowdfunding is developed upon the previous studies.
This thesis deals with problems, which occure when rendering stereoscopic contents. These problems are elaborated, simulated with the help of a program developed in this thesis and evaluated by a group of volunteers. Thereby it shall be determined, whether the errors are noticeable and how much they influence the 3D effect of the stereoscopic images. Each error is simulated using different camera assemblies and evaluated depending on the choosen assembly.
Die Bedeutung von Social Software (SSW) nimmt nicht nur im Privatleben vieler Menschen zu. Auch Unternehmen haben mittlerweile die Potentiale dieser Systeme erkannt und setzen vermehrt auf Web 2.0 Technologien basierende Systeme im Unternehmenskontext ein. So brachte eine Studie der Association for Information and Image Management (AIIM) im Jahr 2009 hervor, dass über 50 % der Befragten Enterprise 2.0 (E2.0), d.h. der Einsatz von SSW im Unternehmen, als kritischen Faktor des Unternehmenserfolges ansahen. Auch durch diesen Trend mit verursacht stieg, laut einer Studie des Beratungsunternehmens IDC, die Menge an digital verfügbaren Informationen innerhalb einer Zeitspanne von fünf Jahren (2006-2011) um den Faktor zehn. Wo früher galt, "Je mehr Information, desto besser.", bereitet heute das Managen dieser schieren Flut an Informationen vielen Unternehmen Probleme (bspw. in Bezug auf die Auffindbarkeit von Informationen). SSW bietet mit neuen Funktionen, wie Social Bookmarking, Wikis oder Tags, das Potential, Informationen durch Nutzerbeteiligung besser zu strukturieren und zu organisieren. In der vorliegenden Arbeit wird am Beispiel der Forschungsgruppe für Betriebliche Anwendungssysteme (FG BAS) gezeigt, wie man vorhandene Informationsstrukturen erfassen, analysieren und darauf basierend Empfehlungen für den Einsatz von SSW herleiten kann. Den Rahmen für dieses Vorgehen bildet ein von Henczel (2000) entwickeltes Modell zur Durchführung eines Information Audits. Hervorzuhebende Ergebnisse der Arbeit stellen zum Einen das Erfassungsmodell für Informationen und Prozesse dar (Informationsmatrix) und zum Anderen das Visualisierungsmodell der erfassten Daten.
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.
With the reaccreditation of the degree programs in the department of computer science at the University of Koblenz-Landau new trendsetting degree programs will be offered. For further planning and design of the individual degree programs the opinion of the students is a considerable indicator. Information about the new degree programs aren"t available during the accreditation process. Students have an interest in knowing about the new degree programs and the new examination regulation and therefore being part in the decision process would be desirable. The concept of e-participation is an opportunity to satisfy this need. It offers the possibility to discuss topics of the accreditation and to bring in own ideas and opinions into the decision process. This bachelor thesis describes an e-participation project at the University of Koblenz-Landau about the accreditation of the degree programs of the faculty of computer science. By using the reference framework of Scherer and Wimmer (2011) the project will be carried out. Furthermore the accreditation process will be modeled to get a better understanding of the whole process and to identify the possibilities for e-participation project integration. The results of this project are going to be covered by an online survey about the e-participation platform. Using the results of the survey and the experiences gained after the project recommendations are given for further e-participation projects. Moreover the reference framework of Scherer and Wimmer (2011) will be analyzed critically.
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.
Activity recognition with smartphones is possible by using its internal sensors without using any external sensor. First of all, previous works and their techniques will be regarded and from these works an own implementation for the activity recognition will be derived. Most of the previous works only use the accelerometer for the activity recognition task. For this reason, this bachelor thesis analyzes the benefit of further sensors, such as the magnetic field, the linear acceleration or the gyroscope. The activity recognition is performed by classification algorithms. Decision Tree, Naive Bayes and Support Vector machines will be used. Sensor data of subjects will be collected and saved by using an own developed application. This data is needed as training data for the classification algorithms.
The result is a model which represents the structure of the data. To validate the model, a test dataset will be used which is different from the training dataset. The results confirm previous works which indicated that the activity recognition task is possible by only using the accelerometer. Orientation, gyroscope and linear acceleration cannot be used for all problems of the activity recognition. Apart from that, the Decision Tree seems to be the best classification algorithm if the model has no training data of the current user.
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.
Within the scope of this bachelor thesis, a survey targeting the alumni of the Department 4: Computer Science of the University of Koblenz-Landau was planned, realized and evaluated. The goal was to support the Task Force Bachelor Master that was in charge of the re-accreditation process of the study courses. At first, the theoretical fundament of the survey design was acquired via desk research. Moreover, the analysis of past surveys of similar character lead to getting an impression of the requirements. Under consideration of recent changes, a survey prototype was created and improved following the insights from a pre-test. Using the open source tool LimeSurvey, the final version was implemented. The platform was used as the technical basis of the survey. The recipients included members of alumni clubs as well as recent alumni from the last years.
The survey lead to insights about the satisfaction of the alumni with their study course and the study situation in general. Furthermore, the opinion regarding two new master courses, E-Government and Web Science, was requested. The feedback from four of the study courses was enough to give significant results, for the other five courses it was only possible to interpret the general statements. All in all, there was a high rate of satisfaction with the studies.
Additionally, it was possible to collect suggestions for improvements and criticism. The main topics were internationality, emphasis on study topics, freedom of choice/specialization and relevancy to practice. As a result of the survey, a recommendation was verbalized, that should lead to an improvement in quality and need of the teaching in the Department 4: Computer Science in combination with the detailed results.
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 this bachelor thesis a tangible augmented reality game was developed, which should have a additional benefit compared to conventional computer or augmented reality games. The main part of the thesis explains the game concept, the development and the evaluation of the game. In the evaluation the flow-experience, as measurement for the games" amusement, was analysed with a user test and the developed game was compared with other smartphone games. Also augmented reality, tangible user interface and tangible augmented reality was introduced and the advantages and disadvantages was explained. The history of augmented reality was introduced too.
The principles of project management are due to the influences of economic conditions and technological development in transition [Wills 1998 & Jonsson et al. 2001]. The increasing in-ternationalization, shortened time to market, changing labor costs and the increasing involve-ment of professionals distributed geographical locations are drivers of the transformations of the project landscape [Evaristo/van Fenema 1999]. Resulting from this, the use of collabora-tive technologies is a crucial factor for the success of a project. [Romano et al. 2002]. Previous research on the use of collaborative technologies for project management purposes focuses especially the development of model-like, universal system architectures to identify the requirements for a specially designed collaborative project management system. This thesis investigates the challenges and benefits that arise when an organisation imple-ments business software for the purpose of collaborative project management.
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.
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.
The measurement of the benefits of collaborative technologies is a challenge caused by sociological influences on these systems. In this work, the introduction of a collaborative system into an existing IT environment is examined, so that a value can be identified for the company. The analysis of frameworks has shown that the benefits can be reaped through better management and organization of in-company resources and optimization of the underlying process.
Die wesentliche Zielsetzung der Bachelor-Arbeit war es, entlang der Anforderungen an DMS/WMS aus dem DOMEA-Konzept und aus dem Kommunalen Gebietsrechenzentrum Koblenz (KGRZ) verschiedene Systeme zu evaluieren. Weiteres Ziel war es, ein System, das die Anforderungen am besten erfüllt, zu identifizieren. Entlang der Evaluation wurde exemplarisch der Workflow des KGRZ untersucht, bewertet und ggf. angepasst. Des Weiteren wurde auf die Frage eingegangen, ob ein einheitliches System im Rahmen des Föderalismus nicht nur in Koblenz sondern auch Rheinland-Pfalz weit eingesetzt werden kann, oder ob ämterspezifische Lösungen vorteilhafter sind.
Especially e-government projects have a complex stakeholder structure: governments, businesses, non-profits and private stakeholders in different forms and roles are involved or affected by e-government projects. Consequently, the success of ICT projects critically depends on the integration of different stakeholder groups in the design processes of e-government solutions. In this context, stakeholder participation is sought therefore useful initiatives like open government and good governance drive this process forward. Although it is important to analyze the objectives, expectations and power characteristics of project participants and project stakeholders, the determinations of the stakeholder groups through a so called stakeholder analysis are insufficiently methodically developed.
The aim of this bachelor thesis is to pick up the stakeholder theories, stakeholder participation theories, stakeholder analysis and transfer it to an administrative level as well as to check their applicability. This will be done by explaining and systematizing appropriate procedures for the classification and mapping of stakeholder groups, through well-known stakeholder theories of Freeman, Mitchel and Rowley. In order to generate recommendations for future e-government projects, the application of stakeholder theories in two e-government projects with stakeholder involvement will be reviewed. It is also important to work out how stakeholder groups can be actively involved in the developmental processes in concrete e-government projects by using Web 2.0 possibilities. The role of Web 2.0 applications as an additional channel of communication and participation tool will be presented and evaluated.
The result is a guide, which supports successful participation of stakeholders in projects, by analyzing the process for stakeholder identification, stakeholder grouping and prioritization and showing instructions and benefits for using Web 2.0.
The advantage of virtual networks is to test routing-algorithms or distributed software in an easy-to-use, cheap and well-arranged way. Optimized Link State Routing (OLSR) and Babel are two modern routing-algorithms for mobile ad-hoc networks that distinguish faulty links from good link connections in their routing process. Typically virtual networks provide nearly perfect link connections without any network traffic disruptions. The Traffic Control (tc) tool is able to manipulate connections in terms of delay and packet loss.
In this bachelor thesis virtual network scenarios are created with VNUML and Qemu and manipulated with tc in order to analyze the behavior of ad-hoc routing algorithms like Babel and OLSR. The behavior of well-known TCP congestion control algorithms, e.g., TCP Vegas and TCP Reno are analyzed, too.
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.
Software integration is an engineering task where image-based approaches are still considered slow and error-prone. In this thesis, we apply image-based software integration to the domain of online Poker systems. That is, we implement the poker expert system PokerBot which can play online. We use the method of screen scraping to capture the screen information needed to interact with the Poker server. The consequent use of Template Matching leads to an efficient implementation. Substantial e ort was also addressed to the artificial intelligence aspects of PokerBot. The purpose of AI is here to mimic human playing style by translating a well-documented Pokerguide into formalized, executable language.
This thesis deals with the distribution of large virtual networks to multiple physical hosts using the virtualization tools VNUML and EDIV. While VNUML is responsible for simulating the network, EDIV has its focus primarily on the distributiion. After a short explanation of basic terms and concepts from the field of network simulation, the two previously mentioned virtualization tools are described in detail. This starts in both cases with a detailed description regarding the proper installation and configuration, followed by a demonstration of the most important functions, such as starting or stopping a simulation. The creation of a suitable network scenario and the information scripts provided by EDIV are two further points described in this context. To use the presented possibilities of those tools in practice, an own network scenario is designed and distributed to several hosts, so that the different functions of EDIV can be shown and described accurately.
Due to the incorrect allocation management and the continuous increase of internet-capable devices, IPv4-adresses are nearly exhausted. For this reason and because of new requirements demanded by the technique of the internet the IPv6-protocol has been developed. The IPv6-protocol provides a larger adress space and will gradually replace the IPv4-protocol. However, the routing-protocols have to be adapted to the new internetprotocol. This paper will introduce and analyse the dynamic Routing-Information-Protocol RIPng which in itself is an inter-gateway protocol (IGP). The routers inside the network can exchange information about their different connections over this protocol. Furthermore, this paper will explain the basics of the IPv6-protocol, of the used protocol-algorithm as well as of the RIPv2-protocol. In the practical part of the paper the Counting-to-Infinity-Problem and some attributes of RIPng will be reviewed under the IPv6-protocol.
To meet the growing demands in the automotive industry, car manufacturers constantly reduce the depth of production and shift value-adding processes to the suppliers. This requires that companies work together more closely and promotes the creation of complex logistics networks. To meet the requirements for information exchange, a consortium of automobile manufacturers launched the project RFID-based Automotive Network (RAN) in 2009. The initiative aims at creating a standardized architecture for efficient material flow management along the entire supply chain. Core component of this architecture is the Informationbroker, an information unit which automatically communicates data which is captured via Auto-ID technology to supply chain participants. The thesis focuses in cooperation with the IBS AG, a software company and consortium partner in the project, on the exchange of goods data.
At first, theoretical foundations are presented by describing the characteristics of a supply chain and explaining standardization efforts and related processes. The chapter on the supply chain focuses on trends in the automotive industry to create a link to the project. The topic of standardization provides in-depth information on electronic data exchange standards in order to additionally create a transition to the Informationbroker concept. In the analytical part, reference projects will be presented with a similar problem and set in relation to RAN. According to project documents, system requirements will be defined and models will be created in order to illustrate the problem. Rich Pictures are used to describe the basis and target state.
Based on these models, the flow of goods related data is depicted between two companies and the role of the Informationbroker for the information exchange is clarified. The thesis aims at establishing an understanding of the challenges of the project and how the proposed concepts of the initiative can lead to an optimization of an automotive supply chain.
The RoboCup Rescue League was founded with the intention to serve as an international communication platform for development of rescue robots. In regions hit by catastrophes, those robots are meant to find buried people, detect their physical condition and send the proper information to rescue teams.
At the university of Koblenz the rescue robot "Robbie" has been in development for years. Robbie accumulates information about his environment by targeted control of sensors and can act autonomous in unknown regions with help of the previous collected data. He creates an internal 2D map of his environment. This map provides enough information to navigate through space and to localize himself. Unfortunately, 2D maps have a huge drawback. When confronted with uneven terrain or even multilayered disaster areas, this technique will meet its limitations. Considered that most afflicted areas will probably have a bumpy ground, it is important to improve this technique.
That is why 3D-mapping is being required. With the help of RoboCup Rescue Scenario this Bachelor Thesis is going to implement a 3D-mapping algorithm and evaluate the flaws of 2D- and 3D-mapping problems thoroughly.
Das Zeitfenster ab 1964 bis heute verzeichnet einen Geburtenrückgang. Diese Tatsache hat insofern negative Auswirkung, als dass es für die sozialen Sicherungen Gefahren birgt, nicht mehr finanziert werden zu können. Des Weiteren ist über einen langen Zeitraum mit einem Fachkräftemangel zu rechnen, sollte sich der Geburtenrückgang weiterhin fortsetzen.
In dieser Ausarbeitung wird der Zusammenhang zwischen dem Bildungsgrad der Frau und dem Anteil kindeloser Frauen und der Anzahl an Kindern untersucht. Sollte dabei ein Zusammenhang bestehen, so müssten vor allem Akademikerinnen den höchsten Anteil an Kinderlosigkeit und die niedrigste Kinderzahl je Frau aufweisen. Im Umkehrschluss müssten Frauen mit Hauptschulabschluss oder Frauen ohne Schulabschluss die niedrigsten Anteile an Frauen ohne Kinder und die höchsten Zahlen an Kindern je Frau vermelden.
Das Ziel dieser Bachelorarbeit ist es ein Schätzkonzept zu validieren, das im Rahmen eines Projektes auf der Universität Koblenz-Landau entwickelt wurde, um den Anteil kinderloser Frauen und die Anzahl an Kindern je Frau zu schätzen
Im Vergleich zu herkömmlicher Computergrafik (perspektivische Projektion) bietet Raytracing entscheidende Vorteile, die hauptsächlich in der vergleichsweise hohen physikalischen Korrektheit der Methode begründet sind. Die Schwächen liegen hingegen im immensen Rechenaufwand.
Ein Raytracer ist vergleichsweise so rechenintensiv, weil für jeden Pixel mindestens ein Strahl verschickt werden muss. Dieser muss gegen alle Objekte im Raum geschnitten werden. Hinzu kommen noch die Strahlen, die entstehen, wenn Strahlen an Objekten reflektiert werden (Rekursion). Um diesen Rechenaufwand zu verkleinern und zusätzlich ein besseres Bild zu erzeugen, soll der adaptive Sampler den Raytracer unterstützen. Der adaptive Sampler soll während des Rendervorgangs den progressiven Fortschritt in der Bildgenerierung beobachten und Pixel von der weiteren Berechnung ausschließen, für die sich ein zusätzliches Verschießen von Strahlen nicht mehr lohnt.
Anders als der rein progressive Raytracer hört der adaptive Sampler mit dem Konvergieren des Bildes auf zu rechnen. Der adaptive Sampler soll so dafür sorgen, dass schneller ein besseres Bild erzeugt wird und somit die Performanz gesteigert wird. Insgesamt erwartet man sich vom adaptiven Sampler Vorteile bei der Berechnung von bestimmten Szenen. Unter anderem eine Verbesserung bei Szenen mit rein diffus beleuchteten Bildbereichen, sowie eine Verbesserung bei Szenen mit unterschiedlich rechenintensiven Bildbereichen. Ein normaler Raytracer kann nicht beurteilen, wie sinnvoll seine Schüsse sind. Er kann nur mehr Strahlen verschießen, in der Hoffnung, das Bild damit effektiv zu verbessern.
Es gibt jedoch viele Szenarien, bei denen eine linear steigende Schussanzahl pro Pixel keine gleichmäßige Verbesserung im Bild erzeugt. Das bedeutet, dass Bereiche im Bild schon gut aussehen, während andere noch sehr verrauscht sind. Man möchte nun Bildbereiche, die bereits konvergiert sind, in denen sich ein weiterer Beschuss also nicht mehr bemerkbar macht, ausschließen und die Rechenleistung dort nutzen, wo man sie noch braucht.
Wichtig dabei ist, dass Pixel nicht ungewollt zu früh von der Berechnung ausgeschlossen werden, die nicht weit genug konvergiert sind. Der adaptive Sampler soll so lange arbeiten, bis jeder Pixel dauerhaft keine Änderungen mehr vorweist. Das bedeutet, dass die Wahrscheinlichkeit für eine signifikante Farbänderung eines Pixels durch Verschießen eines Strahls (bei mehreren Lichtquellen in RenderGin mehrere Strahlen pro Pixel) klein genug ist. Es wird zwar intern keine Wahrscheinlichkeit berechnet, jedoch bekommt der Raytracer eine Art Gedächtnis: Er speichert die Veränderungen im beleuchteten Bild und deren Verlauf in eigenen Gedächtnisbildern. Das "Gedächtnis" für das alte Bild (Zustand des Bildes in der letzten Iteration über die Pixel) repräsentiert dabei das Kurzzeitgedächtnis. Es ist absolut genau. Das Langzeitgedächtnis wird von drei verschiedenen Bildern repräsentiert. Das erste gibt die Anzahl der verschossenen Strahlen pro Pixel an. Das zweite ist ein Wahrheitswertebild, das für jeden Pixel angibt, ob dieser noch in die Berechnung einbezogen werden soll. Das dritte Bild gibt an, wie oft jeder Pixel eine Farbänderung vollzogen hat, die geringer ist als der geforderte Maximalabstand eines Pixels zu sich selbst (vor und nach dem Verschießen eines weiteren Strahls).
Mit diesen drei Bildern ist es möglich, zusätzliche quantitative Informationen zu den qualitativen Informationen des Vergleichs vom neuen und alten Bild zu berücksichtigen.
In dieser Arbeit kläre ich die Frage, ob die gewünschten Effekte eintreten und ob bei Integration in die bestehende Struktur von RenderGin ein Performanzgewinn möglich ist. Die Umsetzung eines adaptiven Samplers ist als Plug-In in der Software RenderGin von Numenus GmbH geschehen. RenderGin ist ein echtzeitfähiger, progressiver Raytracer, der sich durch seine Performanz auszeichnet. Die Bildgenerierung geschieht allein auf der CPU, die Grafikkarte wird lediglich zur Anzeige des erzeugten Bildes benötigt.
Die Umsetzung und Programmierung des Plug-Ins ist in Microsoft Visual Studio 2010 geschehen unter Verwendung des RenderGin SDK der Numenus GmbH.
Potential vermögender Kunden
(2011)
This bachelor thesis deals with the potential of wealthy clients in the private banking sector, as well as with financial services offered in this domain. For this purpose a comparison of the international potential in the German-speaking world was conducted which was ascertained with the help of statistical series.
The reference period for this comparison extends over thernyears from 2000 to 2009. Especially in this time period one was able to notice capital restructuring due to the finance crisis and its impacts. The results out of the analysis of the changing potential are then used to find possibilities of reorganizing offered financial services in the private banking sector. While doing so, the achievement of a high service level has the highest priority as this is the main reason for customers to remain with a certain bank. In addition to that this thesis also mentions new possibilities concerning the banking sector as well as consequences of different models of consultant payments.
In the "Institut MTI Mittelrhein" the impact of training and experience on motion and motion planning in sports is examined. As a part of these investigations, the motion behaviour of a sports climber is analyzed on a sports climbing wall. The aim of this thesis is the segmentation and marker-based detection of the movement of a climber in video recordings. The segmented markers from each image are tracked by a tracking procedure over time. The motion tracks will be exported to the motion analysis software Simi Motion in a format suitable for further analysis.
This bachelor thesis deals basically with the design and the implementation of a data structure describing maneuvers for car-like robots. This data structure affords planning feasible routes which admit a continuous modification of the steering angle.
The focus of this thesis rests on turn maneuvers, which consist of two clothoid arcs and one circular arc. One of the key aspects is the design of a concept for creating a corridor for these maneuvers. A corridor shall enclose the area which the vehicle covers during the corresponding maneuver. It finally provides a basis to guarantee collision freedom. Furthermore, a planning module is designed and implemented within this bachelor thesis. Based on specified construction lines, the planning module creates feasible routes made up of maneuvers.
Domestic robots will become more important in current time. They will find use in everyday situations like cleaning the floor, mowing the lawn or helping to monitor buildings and outdoor installations. However, most of these robots lack in a "human" face, a crucial factor.
In this bachelor thesis a virtual, exchangeable face for the robot Lisa of the study group "Active Vision" of the University Koblenz will be developed. Psychological studies by Krach et al. (2008) have shown that robots with features attractrnattention of the observers and are considered to be more intelligent.
Computerfaces or also Talkingheads are not only used with robots but also in videogames and animation movies. But the movement and mime of the face is usually constructed by hand that provides a fixed course of motions. More interesting is the usage in applications free of barrier. In this field the phonemes are extracted from an incoming audio signal and are assigned to the appropriate visemes.
Within this bachelor thesis this occurrence is achieved with the help of the Text-to-Speech-Synthesizer Festival whereby the movement of the lips change dynamically according to the given text. Not only is the correct movement of the lips of great importance, but also the showingrnof emotions. With the help of a special emoticon arithmetic which is added to the text that is to be synthesized the visualization of emotions is possible.
The Budget Management System IRM@ doesn"t comply anymore with the needs of Rhineland-Palatinate for a modern management information system. Therefore this bachelor thesis introduces the concept "KoRe Light" as a reporting system for cost accounting, which is based on the data of the system IRM@. For the public budget management, this system should be used as a base for decision making. System analysis is the type of systems engineering used, which consists of analysis, conceptual design and implementation.
Implementation is no part of this thesis anymore. Focus of the conceptual design is in the enhanced search function, which allows more comprehensive and easier to read reports. The result contains the components use case diagram, requirements definition, data model, process model and mock-ups for "KoRe Light". In conclusion recommendations for the implementation and a short résumé are given.