Refine
Year of publication
Document type
- Master's Thesis (160) (remove)
Is part of the Bibliography
- No (160)
Keywords
- India (4)
- Artificial intelligence (3)
- China (3)
- Consumer behavior (3)
- Crowdfunding (3)
- Germany (3)
- Innovation (3)
- Blockchain technology (2)
- Customer experience (2)
- Customer support (2)
Course of studies
- IMM - International Management (60)
- MBA - International Business Management (55)
- EMBA - Executive Master of International Business Management (15)
- INM - Informatik (8)
- MOS - Mobile Systeme (6)
- BAM - Business Application Architectures (2)
- IBM - International Business Management (2)
- IRCD - International Relations and Cultural Diplomacy (2)
- SSM - Security & Safety Engineering (2)
- BMP - Business Management and Psychology (1)
Traditional networking severely limits the dynamic requirements of newly emerging
use cases like the Internet of Things. For this reason, this thesis is fundamentally
concerned with the proposal of a software-defined networking approach for industrial
IoT networks. We revisit the core concepts, examine related work and subsequently
present an SDN-focused edge architecture for the KOSMoS research project. In this regard, we aim to improve network flexibility, scalability, maintainability and security.
Finally, the developed concept is implemented as an emulated proof of concept in order to assess its feasibility. For our prototype, we present an intent-driven approach that automatically compiles and deploys network configuration policies based on business goals submitted as description templates.
In der vorliegenden Masterarbeit wurden verschiedene Ansteuerungsstrategien für den Betrieb von dreiphasigen Active-Neutral-Point-Clamped- (ANPC) Mittelspannungs-Netzumrichtern mit Siliziumkarbid (SiC) Halbleiterschaltelementen untersucht. Durch die Vielzahl an aktiven Schaltelementen können bei der ANPC-Topologie zur Modellierung des gewünschten Ausgangssignals zahlreiche unterschiedliche Ansteuerungsstrategien eingesetzt werden. Je nach gewählter Ansteuerungsstrategie können so unter anderem die Faktoren Schalt- und Durchlassverluste, Wirkungsgrad, Verlustverteilung, Schalter- und Ausgangsschaltfrequenz, der Oberschwingungsanteil des Ausgangssignals, sowie die maximale Spannungsbelastung der Halbleiter beeinflusst werden.
Neben der elektrotechnischen Beschreibung der aktuell eingesetzten Umrichter-Technologien wurden in dieser Arbeit primär aus aktuellen Veröffentlichungen und Dissertationen verschiedene Möglichkeiten für die Ansteuerung von ANPC-Umrichter zusammengetragen und insgesamt sieben Sinus-Pulsweiten-Modulationsstrategien (S-PWM) im Detail untersucht. Hierbei wurde für jede vorgestellte Modulationsstrategie das Grundfunktionsprinzip aufgezeigt und analysiert, sowie die sich daraus ergebenden Vor- und Nachteile herausgearbeitet.
Anschließend wurden alle vorgestellten S-PWM-Strategien in der Schaltungssimulationssoftware PLECS implementiert und diese in verschiedenen Betriebszuständen simuliert. Die Simulation ergab, dass sich bei der ANPC-ALD-Strategie eine bestmögliche Verlustverteilung zwischen den Halbleiterelementen einstellt, bei der ANPC-OOZS-Strategie die geringsten Durchlassverluste entstehen und bei den Strategien ANPC-DF, -12, -R2:1 und -SSLD im Bereich der Nulldurchgänge des Ausgangssignals an den inneren Halbleitern kurzzeitige kritische Überspannungen auftreten. Bei den Strategien ANPC-11-Sync, -ALD und -OOZS treten dagegen keine Überspannungen an den Halbleitern auf.
Ausgehend von diesen Simulationsergebnissen wurden die Strategien ANPC-DF, -ALD und -OOZS für den potentiellen Einsatz in Mittelspannungsumrichtern ausgewählt, auf einem FPGA-Board implementiert und damit eine geeignete Niederspannungstestplattform in Betrieb genommen. Durch praktische Messungen auf dieser Testplattform konnten die Simulationsergebnisse in einem ersten Schritt verifiziert werden. Sowohl das erstellte Simulationsmodell als auch die in Betrieb genommene Testplattform können somit zukünftig für weitere Untersuchungen im Bereich der ANPC-Umrichter-Ansteuerungsstrategien eingesetzt werden.
Advantest Company ("the company") is the world’s leading manufacturer of automatic test and measurement equipment used in the design and manufacturing of semiconductors. Because of the complexity of technologies and the supply chain of the semiconductor business segment, the company depends on both internal and external suppliers to manage some aspects of the supply chain of its main product, the System on Chip (“SoC”) test system. As a result, it is of ongoing interest to the company to have tools to continually strive for increased quality, reliability, capacity, and speed. Above all, these tools must enhance the relationships with the suppliers, and ensure the profitability and the company's position in the future.
The goal of this thesis is to understand the supply chain procedure at Advantest Company’s current state from the data-driven perspective by using the process mining technique. This technique is an emerging discipline, providing a comprehensive set of tools to provide fact-based insights and support process improvement. This new discipline is built on process model-driven approaches and data mining.
In this thesis, we discuss opportunities for process mining with an approach to analyse the process and how it can help the company enhance the procedure. This approach, which consists of data extraction from both third-party and internal software solutions, provides better visibility and faster disruptive event notification of the supply chain at the company.
As waste generation increases, so are initiatives to recover products and recycling. A particular waste that has continuously grown is plastics. Since its introduction, it has provided practical implications to different industries; however, it has also negatively affected the environment by its disposal. The recycling of plastic has offered opportunities to conserve non-renewable fossil fuels, reduce energy consumption, and avoid waste. Many countries seek for a sustainable system to recover plastics such as PET bottles. Mexico’s high soft-drinks consumption had consequently increased the disposal of PET bottles. Mexico has developed a recycling industry of PET bottles by following a Shared Responsibility between government, industry and society. However, a lack of awareness and knowledge among the society about the importance to collect the bottles and to recycle them makes it imperative for the introduction of a system that could create a society that recycles more. Providing a description of the opportunities and challenges for a collection system in Mexico simplifies future chances of comprehending the direction and actions needed for increasing recycling activities in the country.
In today's fast-paced business environment, customers expect more than just high-quality products or services. They also demand excellent customer support that is both efficient and personalized. With the growth of businesses and the increasing complexity of products and services, providing efficient customer support has become a critical component of any successful business strategy to fulfill customers and user’s expectations. The present study investigates the need for a technical support helpdesk solution within the business unit Industrial Hydraulics of Bosch Rexroth, a global leader in drive and control technology. The primary objective of this thesis is to assess the current state of the support processes, identify areas of weakness, and leverage these insights to optimize and enhance them. The focus will be on finding a way to enhance transparency of customer data.
Based on the theory to process optimization, a current state analysis was conducted, and expert interviews were carried out to identify weaknesses and potential solutions for improving customer support. The research question "How can the Industrial Hydraulics Services of Bosch Rexroth deliver more effective and efficient customer support?" is addressed through the findings that a central platform is necessary to handle customer inquiries more efficiently, given the diverse communication channels and varying modes of operation within the business unit. The use of the existing SAP CRM ticketing system Robin is suggested as an efficient solution path, which should be optimized for future use based on the identified optimization approaches. The results underscore the importance of a unified approach to working, which is vital for the success of the business unit, resulting in increased efficiency, quality, collaboration, scalability, and customer orientation.
Highlighted as a promising field that targets cost related problems and high research costs, the concept of Lean Management is applied in the biotechnology sector. Specifically, the thesis aims to develop and test a Lean Management implementation model suitable for biotechnological research laboratories. Using multiple mixed methods, a deductive case study approach is taken to investigate requirements for an improvement model. The use of observations and interviews deliver findings which enable the comprehension of the implementation environment. The review of academic literature provided the basis to conceptualize, develop and test a new model, called Biotechnological Laboratory Implementation Model or BLIM. Overall, the results of the implementation can be described as successful since the BLIM meets all requirements fully or with minor restrictions. Effects of the Lean Management implementation are positive and promise to deal with the mentioned cost related problems and high research costs. The findings of this thesis challenge preexisting views on the argument that the success of Lean Management models is subject to the individual characteristics of the organization. As the newly developed BLIM is separated into structured and agile implementation phases, this joint characteristic represents a contribution to research in the field of Lean Management implementations as such and proposes further areas to be researched on.
Patient engagement is the most important element in the process of research/development of medicinal products and healthcare management in today’s times. In a country like India which has a huge population and limited state of regulatory affairs it becomes important to walk the extra mile to protect the patient lives and truly serve them. Time and again it is seen that there is no or limited focus on patient centric processes and we still tend to focus on sponsors as the key stakeholder.
The author in this thesis aims to focus on the clinical trial landscape of India and determine if there is a need to improve the clinical trial processes. If yes, then what type of change is the audience looking for.
The author tries to introduce the human element in the process and remind us all that it is the ‘patients’ who are the centre for the drug development process and serving them and alleviating their pain in the true purpose of the process.
The author along with the helping us find a definition of patient centricity in India, also proposes a model that can be used by the Indian pharmaceutical companies to focus on patient centricity at different stages of the drug development cycle within their organisations.d
Through an extensive review of the literature, a research gap was identified concerning the knowledge around diversity and its impact on personality types and their influence on group performance. Previous literature revealed that diversity is a popular determinant for group composition, since it encompasses many different meanings and interpretations. Researchers would rather focus on easily measurable elements such as age or gender, but few studies have been conducted on deep-level diversity, such as personality traits or values. The aim of this study is to answer the research questions proposed concerning the effectiveness of homogeneous versus heterogeneous groups as well as the impact communication has on their performance. Through an analysis of previous studies and literature the research questions and hypotheses were formulated, and a methodology designed to answer them. The methodology used in this research was a variation of the Marshmallow Challenge. The groups were faced with two challenges. The first one was to build a 50cm-tall structure as quickly as possible, with a limited amount of material, including raw spaghetti, tape, rope and a marshmallow to test the stability of the structure. The second challenge was presented about one week later and involved the same materials, but the participants had to reach 70cm. Four teams of three were chosen. The personality tests had four possible outcomes: red, green, yellow, or blue. Each colour had specific characteristics and adjectives associated with it. The data collected revealed that the heterogeneous groups performed better overall. A slightly significant correlation was found between how well the teams performed and the words spoken per minute for the first experiment, but not for the second. The biggest limitation that hindered this study was the time pressure and limited sample size.
Die vorliegende Masterarbeit analysiert die Problematiken effektiver grafischer Repräsentationen in digitalen Informationssystemen, die mit besonders hoherund dynamischer Datendichte und Datenquellen einhergehen. Anschließend an die Analyse der Problematiken erarbeitet der Autor dieser Forschungsarbeit ein konzeptuelles Modell zur Bewältigung der geschilderten Problematiken, auf Basis von semantisch beschriebenen, wiederverwendbaren grafischen Visualisierungselementen und den ebenfalls semantisch beschriebenen in die Visualisierung zu überführenden Daten. Besonders hervorzuhebende Erkenntnisse dieser Masterarbeit sind die Identifikation von Qualitätskriterien zur Zielführung einer effektiven Visualisierung gemäß der visuellenWahrnehmung des menschlichen kognitiven Systems, die Notwendigkeit zur Erweiterung der Vokabularmenge der schema.org-Ontologie zur Anwendung der identifizieren Qualitätskriterien und das Auffinden geeigneter Visualisierungselemente sowie das Zuordnen der Daten zu entsprechenden Visualisierungselementen über den Aufbau und Vergleich einer Baumstruktur für sowohl die Daten als auch die der Visualisierungselemente. Diese Forschungsarbeit ist von besonderer Relevanz für Entscheider, Projektmanager und Softwareentwickler, die digitale Informationssysteme mit einer hohen Anzahl an heterogenen Datensätzen und Datenquellen entwickeln.
Sustainability is a megatrend and has been a topic of great interest for decades. Even though, industrialization came forth with genius and profitable businesses it almost never took into consideration the value of natural capital and sustainability. According to a 2017 report by the UN, there are more than 51 trillion microplastic particles in the sea, more than 500 times the number of stars in the Milky Way. With the depletion of natural resources, increasing consumer education and the need for a better future the world has been prompted to take solid steps to control the menace that could be climate change and unsustainability. This paper makes an effort to understand the effect that sustainable marketing practices have on the profitability of an organization. The case studies of the three famous athleisure brands provides an insight into how sustainability can help companies drive towards a profitable and a circular future.
In the Job Satisfaction- Performance literature largely, job satisfaction is portrayed and
discussed positively as a performance driver for organizations that embark on the journey
of progress. This research asks whether job satisfaction inevitably leads to negative
implementation outcomes and how. This research focuses on factors other than job
satisfaction that can be used to drive better performance of employees and how
satisfaction could also lead to negative outcomes. In an attempt to answer this question,
the research undertakes three key tasks. First, it contextualizes how job satisfaction has
minor affects on performance. Second, it outlines the factors that can increase
performance. Third, it discusses crisply the adverse affects on job satisfaction through
empirical evidence to provide focus and 'evidential grounding' for the research.
Essentially, the research contends that for institutions that are unable to manage and lead
productivity from employees, this research serves a powerful purpose ensuring the multi-dimensional approach to view employee performance and modelled to take account of
the people on whom it may impact as well as the overall value it may deliver.
2016 marks the 56th anniversary of the oil cartel: OPEC. It managed to increase prices in 1972. In doing so, it behaved in a manner consistent with a cartel, bringing about a wave of studies on it. This study provides an overview of Organization of Oil Exporting Countries (OPEC)’s cartel behavior form 1980 to 2014/5, from five different perspectives. These perspectives, although have been studies individually, but never holistically.
This study grounds the research questions into the structure-conduct-performance paradigm for each of the five perspectives of cartel behavior. Each perspective is also backed by a theory of its own. The first perspective is that of the neo-classical theory of the firm, in that OPEC is deemed to be created for the purpose of creating profits for its members. The second perspective looks at whether or not OPEC is internally and externally stable by looking at economic and non-economic influences on the organization. The third perspective makes use of the theory of market contestability, in oder to determine which member in the cartel has had and still holds most influence within the cartel. The fourth perspective looks at entry and exit trends from OPEC, to determine what impact it has on the incumbent profits and that of the defectors. The fifth perspective uses the concept of black swan from the strategic management literature to discuss whether or not OPEC will dissolve in the next fifty years and whether this will bring about a golden or a black swan.
The methodology prevalent throughout the study is a case study analysis of the OPEC cartel behavior, however, two of the chapters also run a regression analysis (chapters 3 and 4), using variables identified from the structure-conduct-performance paradigm. The second and the third provide a descriptive overview via line graphs, while the last uses the methodology of observation.
It has been found that OPEC has earned abnormal profits which steadily increased, Saudi Arabia has been instrumental in managing quotas, and importance of each country is determined by the output it produced from one year to the next. In addition, economic influences are more important than the non-economic influences for OPEC's viability as a cartel, exit from OPEC is not advisable for the defector nor the incumbent firms and the cartel is not internally stable as barriers to entry are low and members can easily defect and can rejoin the cartel. Lastly, OPEC’s influence in the oil market is waning fast, which might lead to a black swan event.
The financial markets are currently facing uncertain circumstances, which is increasing their tail risk. A recent study was conducted to measure the tail connectedness between North America, Latin America, Europe, Asia, and Oceania. The study looked at 18 stock market indices using a neural network quantile regression approach from January 4, 2012, to May 5, 2022. The study found that the North American, European, and Latin American stock markets had the highest exposure to tail risk, while Asia and Oceania showed no significant risk compared to the rest of the world indices and were independent. The study also identified the Global Financial Crisis and the COVID-19 pandemic as intense events that yielded high tail risk. The Systematic Fragility Index ranked the pre-COVID period stock market and the Nasdaq during the COVID sample as the most susceptible markets. On the other hand, the Systematic Hazard Index identified the S&P as the chief risk contributor in the system.
The purpose of this study was to work out structured ways to lead GVTs. The Model of Team Leadership, which has been worked on in chapter 5, has shown that a mental model that can be used by people leading a team is helpful also when applied for GVTs. This model for virtual leadership offers the possibility to locate possible issues and address upcoming problems that might hinder the project to succeed early enough, but with prior monitoring, surveying and examination. This model, which is based on the assumption that leaderships is being shared in teams and also multiple team members can execute leadership actions, can be applied in GVTs as a basic mental model by all team members. This helps creating a common understanding of team leadership and the areas where issues, misunderstandings and conflicts can stem from.
Secondly, this work showed that there is not one single form of GVT existing – as it is often the case in research work – and requires consequently different focus of leadership actions. The GVT Matrix is a first step, which tries to differentiate leadership challenges along the defined GVT types. This point can be addressed in future research to find respective data that are increasing the scientific relevance on the differences of leadership in GVTs that can then be applied in the model used in chapter 6.
This point is also the limitation of this research. As many data is available for general leadership of GVT, data on leadership issues relating special types of GVTs is relatively rare. The assumptions and validated findings that have been used to fill the GVT Matrix are not as fully scientifically reliable as it could have been. Future research can address this issue if new data is available which are examining the differences of GVTs.
Digital twin as a service : Ressourcenmanagement mit Energiedaten aus cyber-physischen Systemen
(2019)
Die Energiewende führt zu einer Paradigmenänderung. Der Zeitpunkt der Energieabnahme wird sich zunehmend an dem der Energieerzeugung orientierten. Die Steuerung des Energiebedarfs kann durch energieorientierte Produktionsplanung gesteigert werden. Dies erfordert eine Vorhersage des Energiebedarfs. Hierfür wird ein System entwickelt, das eine Modellierung mittels maschinellen Lernens nutzt. Die Datenbasis wird durch eine Vorgehensweise zur Abstrahierung von Fertigungsmaschinen erzeugt. Das System besteht aus gruppierten Microservices, es berücksichtigt die unterschiedlichen Anforderungen der Modelle an die Infrastruktur. Die Modelle sind in digitalen Zwillingen integriert, die als Dienst genutzt werden. Hierdurch ist eine effiziente Adaption von ˜Äderungen an Fertigungsmaschine oder Modell-Methodik möglich. Eine exemplarische Anwendung der Abstraktionsmethode und der Modellierung mittels neuronalen Netzes demonstrieren die Umsetzbarkeit.
This thesis has the purpose to investigate the oil price as the global economic factor but also to examine its implications on the worldwide economy. Thereby the determinants of the oil price are investigated by tackling the oil price itself from three different perspectives – the supply and demand framework, the prevailing world oil market structure as well as from the perspective of already statistically proven oil price determinants. In addition, the arising macroeconomic implications of oil price fluctuations on oil-importing and oil-exporting countries are examined. The investigation based on a thought experiment demonstrates the supply and demand framework to be unable to fully explain all past price changes. The examination on the prevailing market structure identifies the world oil market to be best described as a supply, pure, closed, partial and collusive form of an oligopoly. Analyzing the competitive behavior of the world oil market on three levels identifies non-OPEC producers’ competition to behave in a Cournot manner whereas among OPEC producers Saudi Arabia is identified to be a Stackelberg-follower with certain conditions while at the same time permanently bearing the ambition to become the Stackelberg-leader. The identification on the best describing oligopoly model for the overall industry is inconclusive. Investigating OPEC’s cartel hypothesis does not fully exclude its collusive behavior but denies the OPEC to be described as a prime example of a cartel. The examination of already existing econometric analyses identified a total of 13 determinants to play a key role in the oil price definition process. Investigating the arising macroeconomic implications of oil price fluctuations show oil price changes to be of great importance for the overall economic performance and is best described as a form of a positive of negative vicious circle in which the interconnected second or even third round effects intensify the implications on the macroeconomic activity.
Im Rahmen dieser Master-Thesis wurden Verfahren zum Transfer eines Arrays kleiner Dies (unverkapselte Chips) mit einer Kantenlänge von 250 μm bis 300 μm untersucht. Die Dies sollten hierbei von UV-lichtempfindlicher Folie selektiv abgehoben und auf einem Zielsubstrat abgesetzt werden. Als Verfahren wurde die Stempeltechnologie gewählt. Zum Aufnehmen der Dies wurden Stempel aus Silikon gegossen. Als Substrate zum Absetzen der Dies wurden Gläser mit Zucker beschichtet. Zur Überprüfung des Verfahrens wurden Zugversuche durchgeführt. Die senkrechte Abzugskraft der verwendeten Folie und der Silikonstempel wurde ermittelt. Durch Abzugstests der Folie im belichteten und unbelichteten Zustand wurden die genutzten Belichtungsprozesse überprüft. Das Umsetzen wurde mit gesägten Stücken eines Siliziumwafers durchgeführt. Es konnte nachgewiesen werden, dass das Umsetzen mit Silikonstempeln möglich ist und die erzeugten Kräfte hierfür ausreichen. Die Herstellung und Vorbereitung der gesägten Siliziumwürfel erwies sich hierbei als kritischer Prozess, was die Reproduzierbarkeit der Umsetzung stark beeinträchtigt.
The thesis emphasizes on the scale of production and waste of plastics, market share of single use plastics and attempts to find alternatives to one of the most problematic single use plastic marine litter items – single use plastic tableware and cutlery. The thesis is further narrowed to one of the Biodegradable tableware and cutlery BIOTREM from Poland that produces single use or disposable tableware and cutlery with the raw materials wheat bran and bioplastics PLA.
A study involved in the internationalization of BIOTREM is carried out based on the guidelines and principles of Global Marketing by Hollensen (2014). The study includes the important steps in internationalization process such as decision whether to internationalize, factors affecting internationalization, internationalization models suitable for BIOTREM.
Germany is considered as a hypothetical target market for the expansion of BIOTREM and the challenges for internationalization to Germany is analyzed with the help of Porter’s Five Force framework and SWOT Analysis. Further, various types of entry modes and factors that would influence the strategy for BIOTREM’s entry into German Market are studied and the suitable options are recommended.
A few recommendations w.r.t elements of marketing mix – product, place and promotions are suggested and also included are the general recommendations regarding company’s website contents. A recommendation is made on new form of crowd funding option – Security Token Offerings (STO’s) for BIOTREM expansion plan.
Finally, it is concluded with enlisting the answers found for the research questions and the message on taking responsibility for single use plastic pollution problem.