Offenburg University of Applied Sciences
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Continous Performance Monitoring of a Realtime Software System
No full textMit zunehmender Komplexität von Softwaresystemen wird es immer schwieriger Performance Auswirkungen durch Änderungen an der Software zu erkennen. Meist werden Performance-Probleme zu spät erkannt und die Ursachensuche stellt dann eine große Hearusforderung dar, da es viele Einflussfaktoren gibt und oft nicht bekannt ist, wie lange das Problem schon besteht. Hier setzt das kontinuierliche Performance Monitoring an, denn damit wird die Performance fortlaufend zu jeder Softwareversion gemessen und der Verlauf der Performance über die Zeit erfasst.
In dieser Arbeit wird ein Konzept zu diesem Monitoring entwickelt. Konkret wird dabei die Performance eines 2D Laserscanners untersucht, der mit der Zynq Ultrascale+ MPSoc Plattform realisiert wurde. Eine wichtige Komponente des Systems stellt das verwendetete Embedded Realtime Linux dar. Deshalb wird dessen Performance, anhand definierter Parameter aus der Literatur, gemessen. Dafür werden vorhandene Tools zum Auslesen dieser Parameter untersucht und schließlich eingesetzt, um diese auf dem System zu erfassen. Eine weitere wichtige Performancekenngröße stellen die Durchlaufzeiten von Daten durch das System dar. Diese Laufzeiten werden an bestimmten Punkten im C++ Programmcode gemessen und anschließend mit einer Python Anwendung ausgewertet.
Für jede neue Softwareversion wird automatisch eine Messung der Linux Performance, sowie der Durchlaufzeiten durchgeführt. Die dabei gewonnenen Daten werden mit einem Datei basierten Ansatz in Artifactory abgelegt, aus welchen schlussendlich Auswertungen, in Form von HTML Dateien, erstellt werden. Diese enthalten verschiedene Visualisierungen der Messergebnisse einer Messung, sowie den Verlauf der Durchschnittswerte je Softwareversion. Das Ausführen der Messungen auf dem Gerät, sowie die Auswertung der Messergebnisse führt ein dafür entwickeltes Python Programm aus.In this Bachelor Thesis, a concept for continuous performance monitoring of a complex software system is developed. The goal is the detection of Performance changes related to modifications of the software. The evaluated system is an 2D Laserscanner and is built on top of the Zynq Ultrascale+ MPSoc platform.
Since the used Realtime Embedded Linux plays an important role, its performance is measured by defined parameters from the literature. For that purpose, tools are evaluated which can measure these parameters. These tools are then used to read the performance parameters on the device.
Beside the Linux performance, runtimes of data frames through the system represent an important performance indicator. For that reason, the processing time of the C++ code will be measured at different points in the processing chain with a software solution.
For every software version of the device a measurement is performed automatically
for the Linux Performance and the runtimes. The data gathered by this measurement is stored permanently with a file based approach in Artifactory.
This saved data is then used to create reports in the form of HTML files. These Reports contain a variety of visualizations for every measurement and for the average values in relation to the software version. These Tasks are executed by a Software written in Python
Application of the TCO Method for the cement industry considering CCS sustainable technology
Get PDFTotal Cost of Ownership (TCO) is a key tool to have a complete understanding of the costs associated with an investment, as it allows to analyze not only the initial acquisition costs, but also the long-term costs related to operation, maintenance, depreciation, and other factors. In the context of the cement industry, TCO is especially important due to the complexity of the production processes and the wide variety of components and machinery involved in the process.
For this reason, a TCO analysis for the cement industry has been conducted in this study, with the objective of showing the different components of the cost of production. This analysis will allow the reader to gain knowledge about these costs, in the industrial model will be to make informed decisions on the adoption of technologies and practices that will allow them to reduce costs in the long run and improve their operational efficiency.
In particular, this study pursues to give visibility to technologies and practices that enable the reduction of carbon emissions in cement production, thus contributing to the sustainability of industry and the protection of the environment. By being at the forefront of sustainability issues, the cement industry can contribute to the achievement of environmentally friendly technologies and enable the development of people and industry.
The Oxyfuel technology has been selected as a carbon capture solution for the cement industry due to its practical application, low costs, and practical adaptation to non-capture processes. The adoption of this technology allows for a significant reduction in CO2 emissions, which is a crucial factor in achieving sustainability in the cement manufacturing process.
Carbon capture storage technologies represent a high investment, although these technologies increase the cost of production, the application of Oxyfuel technology is one of the most economically viable as the cheapest technology per capture according to the comparison. However, this price increase is a technical advantage as the carbon capture efficiency of this technology reaches 90%. This level of efficiency leads to a decrease in taxes for the generation of CO2 emissions, making the cement manufacturing process sustainable
Impacts of Using Cloud Computing in Business Perspective
No full textCloud computing has revolutionized the way businesses operate by providing them with access to scalable, cost-effective, and flexible IT resources. This technology has enabled businesses to store, manage, and process data more efficiently, leading to improved competitiveness and increased revenue. The purpose of this thesis is to explore the impacts of using cloud computing from a business perspective. The research employs both primary and secondary sources of data, including a literature review, interviews with employees who have more than 5 years of experience, a questionnaire, and observations from Billwerk+ company.
The findings of this research indicate that cloud computing has had a significant impact on businesses, providing them with cost savings, improved agility and flexibility, and enhanced access to data and applications. However, it has been revealed that the benefits of cloud computing for companies may vary according to the departments of the employees. The results of this research contribute to the existing body of knowledge on the topic of cloud computing and its impact on businesses. The findings of this thesis can be used by business owners, managers, technology professionals, and students to make informed decisions about the adoption and use of cloud computing technology.
In conclusion, this thesis provides a comprehensive understanding of the impacts of using cloud computing from a business perspective, highlighting the factors that companies consider when deciding to use cloud environments and the views from different departments. The results of this research will be valuable to a wide range of individuals interested in exploring the implications of cloud computing for businesses
Entwicklung eines Compilation-Managers für einen statischen Typchecker für die Programmiersprache Erlang
No full textDie Komplexität von Softwareprojekten hat in den letzten Jahren stetig zugenommen. Um den gleichzeitig steigenden Anforderungen an die Codequalität gerecht zu werden, setzen auch ursprünglich dynamisch typisierte Programmiersprachen zuhnemend auf statische Typisierung. Dies kann in Form von externen Werkzeugen geschehen, die zusätzlich zum eigentlichen Compiler den Code auf Typsicherheit überprüfen, oder alternativ durch Erweiterung der Compiler selbst, um die Unterstützung für statische Typisierung direkt in der Sprache zu verankern. Ziel des etylizer-Projekts ist es, für die Programmiersprache Erlang zunächst ein solches externes Tool bereitzustellen und langfristig Teil der Compiler-Toolchain zu werden.In dieser Arbeit wird der Typchecker um die Fähigkeit erweitert, Erlang-Projekte vollständig zu verifizieren. Dafür wird zunächst die interne Symboltabelle erweitert, die etylizer nutzt, um Verweise auf Funktionen und Typen aus anderen Modulen aufzulösen. Die Implementierung der Symboltabelle wird so angepasst,dass sie zur Laufzeit um alle für das aktuell geprüfte Modul benötigten Symbole erweitert wird. Um die Laufzeit im Rahmen zu halten, wird ein Algorithmus entwickelt, der die Abhängigkeiten zwischen den Source-Code Dateien des Erlang-Projekts erkennt und anhand dieser entscheidet, welche Dateien sich seit dem letzten Durchlauf geändert haben und deshalb erneut überprüft werden müssen.The complexity of software projects has increased steadily in recent years. In order to meet the simultaneously increasing demands on code quality, even programming languages that were originally dynamically typed are increasingly relying on static typing. This can take the form of external tools that check the code for type safety in addition to the actual compiler, or alternatively by extending the compilers themselves to embed support for static typing directly in the language. The goal of the etylizer project is to provide such an external tool for the Erlang programming language and to become part of the compiler toolchain in the long run.In this work, the type checker is extended by the ability to verify entire Erlang projects. For this purpose,the symbol table, which etylizer uses internally to resolve references to functions and types from other modules,will be extended. The implementation of the symbol table is adapted in such a way that it is extended at runtime by all symbols needed for the currently tested module. To keep the runtime within limits, an algorithm is developed that recognizes the dependencies between the source code files of the Erlang project and uses them to decide which files have changed since the last run and therefore need to be checked again
A Comprehensive and Systematic Survey on the Internet of Things (IoT): Challenges and Solutions for Security and Privacy
No full textThe Internet of Things is spreading significantly in every sector, including the household, a variety of industries, healthcare, and emergency services, with the goal of assisting all of those infrastructures by providing intelligent means of service delivery. An Internet of Vulnerabilities (IoV) has emerged as a result of the pervasiveness of the Internet of Things (IoT), which has led to a rise in the use of applications and devices connected to the IoT in our day-to-day lives. The manufacture of IoT devices are growing at a rapid pace, but security and privacy concerns are not being taken into consideration. These intelligent Internet of Things devices are especially vulnerable to a variety of attacks, both on the hardware and software levels, which leaves them exposed to the possibility of use cases. This master’s thesis provides a comprehensive overview of the Internet of Things (IoT) with regard to security and privacy in the area of applications, security architecture frameworks, a taxonomy of various cyberattacks based on various architecture models, such as three-layer, four-layer, and five-layer. The fundamental purpose of this thesis is to provide recommendations for alternate mitigation strategies and corrective actions by using a holistic rather than a layer-by-layer approach. We discussed the most effective solutions to the problems of privacy and safety that are associated with the Internet of Things (IoT) and presented them in the form of research questions. In addition to that, we investigated a number of further possible directions for the development of this research
Online Identification of Semiconductor Switching Times in Inverters with Inductive Load Using an FPGA and Potential Separated Comparators
No full textThe nonlinear behavior of inverters is largely impacted by the interlocking and switching times. A method for online identifying the switching times of semiconductors in inverters is presented in the following work. By being able to identify these times, it is possible to compensate for the nonlinear behavior, reduce interlocking time, and use the information for diagnostic purposes. The method is first theoretically derived by examining different inverter switching cases and determining potential identification possibilities. It is then modified to consider the entire module for more robust identification. The methodology, including limitations and boundary conditions, is investigated and a comparison of two methods of measurement acquisition is provided. Subsequently the developed hardware is described and the implementation in an FPGA is carried out. Finally, the results are presented, discussed, and potential challenges are encountered
Wandelnde Web-User-Experience und ihre Auswirkung auf die Kommunikation in der HoReCa Branche
No full textIn dieser Bachelorarbeit wird die Veränderung der Web-User-Experience in der
HoReCa-Branche (Hotel, Restaurant, Catering) am Beispiel der HOBART GmbH untersucht.
Dabei liegt das Hauptaugenmerk auf der deutschen Website hobart.de.
Zunächst werden wichtige theoretische Grundlagen vermittelt und die Branche sowie das Unternehmen als Untersuchungsgegenstand genauer vorgestellt. Anschließend folgt eine eingehende Analyse des Ist-Zustands der Website, sowie eine Definition der Zielgruppen und Erstellung von Personas. Die vorgestellte Methodik, eine Usability-Evaluation mit realen Nutzern, wird beschrieben und angewendet. Anschließend werden die Ergebnisse evaluiert
und diskutiert. Auf Grundlage der Erkenntnisse werden Handlungsempfehlungen abgeleitet, um die User-Experience positiv zu verbessern.
Es wird deutlich, dass eine gute Web-User-Experience ein kontinuierlicher Prozess ist, der einer ständigen Weiterentwicklung und Überprüfung erfordert, um den wandelnden Bedürfnissen der Nutzer gerecht zu werden.This bachelor's thesis explores the transformation of web user experience within the HoReCa industry (Hotel, Restaurant, Catering), using the example of HOBART GmbH, with the primary focus on their German website hobart.de.
The thesis begins by providing important theoretical foundations and provides a
detailed introduction to the subject of analysis, including an overview of the company and the industry. Subsequently, a comprehensive analysis of the current state of the website is conducted, along with the definition of target audiences and the creation of personas. The methodology employed involves a usability evaluation involving real users, which is presented
and applied. The results are then presented and thoroughly discussed. Based on the insights gained, practical recommendations are derived to enhance the User-Experience in a positive manner. The research underscores the significance of understanding that a successful web user experience is an iterative process that necessitates continuous evolution and evaluation to effectively meet to the changing user needs
Entwicklung einer On-line Teilentladungsmessung für elektrische Traktionsantriebe im Wechselrichterbetrieb
No full textUm die Effizienz ihrer Antriebe zu steigern, setzen die Automobilhersteller auf immer höhere Bordnetzspannungen. Außerdem kommt es durch die Anwendung von Pulsweitenmodulation (PWM) zu Spannungsüberschwingern und einer nichtlinearen Spannungsverteilung an den Windungen. Dies führt zu hohen Anforderungen an das Isolationssystem der Elektromotoren. Überschreitet die elektrische Feldstärke einen kritischen Wert, kann es in dem Isolationssystem zu sogenannten Teilentladungen (TE) kommen. Diese führen zu Erosion und innerhalb von kurzer Zeit zum Ausfall des Motors. Für die Hersteller der Antriebe ist es daher essenziell, deren Maschinen realitätsnah auf Teilentladungen zu messen. In der Literatur gibt es wenig Erkenntnisse über die On-line TE-Messung an einer E-Maschine im Wechselrichterbetrieb. Daher ist es das Ziel dieser Thesis, ein Messverfahren zu entwickeln, mit welchem E-Motoren im Wechselrichterbetrieb auf dem Prüfstand auf Teilentladungen gemessen werden können. Außerdem sollen die Ergebnisse dieser Messmethode mit den TE-Einsetzspannungen einer Off-line TE-Messung verglichen werden.
Für die Teilentladungsmessungen wurde eine E-Maschine auf einem Prüfstand betrieben und mittels einer Leistungselektronik angesteuert. Zur Erfassung der TE wurden Sensoren auf Basis einer kapazitiven Kopplung an den drei Zuleitungen zum Motor angebracht. In den Versuchen wurde die Spannung, die Temperatur und der Umgebungsdruck variiert. Zum Vergleich wird die E-Maschine nach den Versuchen auf dem Prüfstand zusätzlich an einem Hochspannungsprüfgerät auf Teilentladungen gemessen.
Im Nennbetrieb ergeben sich ab einer DC-Spannung von 550 V starke Entlade-Signale. Die Auswertung der Signalcharakteristik ergibt, dass es sich hierbei um Lagerentladungen zwischen Rotorwelle und dem Gehäuse handelt. Ausgehend von der Raumtemperatur, führt ein Erhöhen der Temperatur um 60 °C zu einer Reduzierung der TE-Einsetzspannung um 120 V Spitze-Spitze. Der Vergleich des Messequipments mit Ergebnissen des Hochspannungsprüfgeräts ergibt, dass sich bereits in der Messmethode Unterschiede ergeben und die ermittelten TE-Einsetzspannungen nicht direkt miteinander vergleichbar sind
Improving System Level Safety and Security of a Spectrum Monitoring Unit
No full textMicrocontrollers are known for their simplicity and flexibility in different complex use cases. They are used in all electrical devices we see every day irrespective of its type, to make them smart. Generally, there is a limitation in case of security (Encryptions) as μC’s have less computational capabilities. In a Spectrum Monitoring Unit, a ATmega128A is used on Main board as a microcontroller to control and power all the sub devices. It makes sure every sub device is working properly as per the rules set / defined in the system. This is also used for supervising the functions of the sub devices in the monitoring unit. This can be used to safeguard the device from internal interruptions like Increase/ Decrease in the Temperatures using sensors to read the values on defined intervals and create alerts accordingly without obstructing / halting the working of the device unless it’s too critical.
This thesis focuses on security flaws of a Spectrum Monitoring Unit and uses a Risk Assessment methodology to find potential attacks. To identify the critical risks, the study quantifies these attacks. The investigation also includes creating mitigation strategies specifically designed to deal with the vulnerabilities found. Then, these mitigation techniques are put into practice with the debugging software developed specifically for the device. By methodically identifying and mitigating potential risks, the thesis seeks to improve the product's security condition through an integrated process that offers a strong protection against a range of security concerns
Designing Virtual Conference Venues Through Integration of Game Engine Technologies and Event Management Information Systems
No full textIn a human-centered society 5.0, participation in events such as trade fairs and academic conferences should fit the consumer’s profile and enable restriction-free participation by addressing potential economic, spatial, temporal, and individual constraints. Global challenges that have emerged or intensified in the past few years have caused a transformation in the event industry. Solutions that make the industry more resilient to future global challenges are now being explored. Within this transformation, the shift from physical to digital spaces gained importance. However, creating an environment that can satisfy the participants’ needs in interaction and immersion remains a challenge for both, academia and the event industry. This paper introduces an integration framework for game engine technologies and event management systems to enable restriction-free participation while strengthening the collaboration between participants in a virtual event. The use of the integration framework is demonstrated in an industry setting where a state-of-the-art game engine accessed through browser technologies is used to recreate a physical conference venue and populate it with content from an open-source event management information system