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Educational institutions have increasing needs for professional digital communication. When selecting suitable communication tools, there is a need for appropriate information as a basis for decision-making. Messenger communication in particular is strongly integrated into people's private everyday lives. While needs for extensive data-secure communication in educational contexts are increasing, there is a lack of concepts for data-protected and privacy-preserving support of educational processes through software (Karaboga et al 2014; Digitalcourage e.V. n.d.) , as well as for mandatory training for professionals (Zorn, Tillmann, and Kaminski 2014; Imort and Niesyto 2014), and reliable information for viable software alternatives. This paper outlines the specific requirements of educational institutions when selecting suitable software, using messenger communication as an example. From these requirements, criteria for needed information are presented as a basis for software selection decisions in three categories: data protection/privacy, accessibility/low-barrier, practicability. Since no criteria and good practice suggestions were available so far, a study was conducted to elicit the characteristics of potentially suitable messenger software. To this end, the necessary criteria for the three categories mentioned were first defined and then German and well-known international messengers were tested for data protection criteria. Based on the results for conformity with the EU's General Data Protection Regulation (GDPR) as an inclusion criterion, the messengers in question were subjected to a practical test. In the process, additional practicality criteria were developed, in part iteratively.
In addition to institution-internal messengers, six services were identified among the freely available provider-dependent messengers that can be used in a GDPR-compliant manner, at least for users over the age of 16. At the time of publication, this leaves only five: Threema, Wire, SID, Ginlo, Chiffry. Furthermore, provider-independent messenger systems that adhere to the international standard protocol for the exchange of chat messages (XMPP) appear to be a viable option for educational institutions. In-house or commissioned server hosting would then be possible and a corresponding agreement for commissioned data processing can be concluded with an IT service provider.
The decisions to use "Wire" and "Threema Work" in the IDiT project context are explained and justified. The context was vocational training for prospective office management clerks at vocational schools and vocational training centers. Although the underlying considerations are tailored to the project context (application in the Berufsförderungswerk Köln), they can be generalized.
This thesis is aimed for finding a solution for non-gaming application of Virtual Reality technology in data visualization and analysis. Starting by reconstructing the concept of Virtual Reality, the paper then describes the principles, concepts and techniques of designing a Virtual Reality application. In the last part of the thesis, a detailed description of how a prototype implemented is presented to provide a preview of how data visualization and analysis and Virtual Reality technology can be combined together in order to enable users to perceive and comprehend data in a possibly better way.
Configuration of energy transition factors in Inner Mongolia: A qualitative fuzzy logic approach
(2022)
Transitioning towards a low-carbon society is now increasingly becoming a global concern. The goal of successfully achieving this energy transition has become one of most pressing challenge, both among government decision makers and academia. Energy transition has raised up and become one of the top action priorities in China. Inner Mongolia, as the study area in this research, is significant in China's energy transition as one of leading provinces in terms of energy resources and electricity outward transmission.
The main goal of this dissertation is to identify configurations that influence on the energy transition in IMAR. On the basis of a multilevel perspective (MLP) framework, the method of fuzzy-set qualitative comparative analysis (fsQCA) is applied within the thesis, taking 8 Chinese municipalities or leagues as study cases. A qualitative comparative study is carried out of configurations of diversified factors, which affect China’s energy transition. Eight antecedent conditions extracted from landscape level, regime level and niche level respectively.
It is shown that different transition trajectories can have a similar energy transition outcome. Energy transition itself is induced by multiple factors collaboratively. Coal resource curse does not always have negative effects on energy transition in Inner Mongolia. Within this work, two main energy transition modes (supply and demand balance reversed mode in western IMAR and energy technological transformation mode in eastern IMAR) are constructed based on regional differences and yearly dynamics, illustrating the trajectories with different municipal characteristics. The transition pattern also shows different geographical characteristics. Different east-west distribution of the electricity market distributes differently in eastern and western Inner Mongolia, however, the difference in distinct forms of electricity market does not show enough impact on the energy transition trajectory in this dissertation. Overall, this study shows that the local response and its effects on the process of energy transition, in the light of the encouragement and advocacy by the central government. Meanwhile, this study offers a deeper understanding in the feasibility of the application with a methodological combination of MLP and fsQCA in provincial level for future research.
The synthesis of 17-hydroxy-oleic acid based oligomeric esters was investigated with immobilized Pseudozyma antarctica Lipase B and hexanediol as co-substrate. The effects of different reaction parameters on velocity and product composition at equilibrium conditions were analyzed. The synthesis of oleic acid esters was used as a reference system for initial evaluation of reaction parameters. The reaction with oleic acid and hexanediol was fastest at an enzyme concentration of 5% at 60 °C and high conversions of > 90 % were achieved in non-polar solvents in the presence of molecular sieves. In heptane an oleic acid conversion of 96 % was reached with a final diester to monoester ratio of > 4:1. In syntheses trials with 17-hydroxy-oleic acid the formation of oligomers was verified with GPC, however; conversion was generally lower than with oleic acid. Removal of hydroxyl fatty acid monomers and dimers and the formation ester functionalities could be verified by GC analysis. An increase of the degree of oligomerization was observed simultaneously by GPC analysis. The number-average molecular weight was around 1400 in the best trials corresponding to a degree of oligomerization of around 4 units of hydroxyl-fatty acid attached to a hexanediol core. Though transformations were not complete, the final oligomer size was in the lower range of polyester diols used for polyurethane manufacturing.
Starmerella bombicola is known to produce sub‐terminally hydroxylated lactonic sophorolipids (SLs), while Candida kuoi synthesizes acidic open chain SLs with terminally hydroxylated fatty acids. Upon feeding glucose and fatty alcohols both strains form long‐chain nonionic SLs. According to structure elucidation the SLs consist of a hydroxylated fatty acid esterified with fatty alcohol and linked via a glycoside bond to the diacetylated sophorose unit. Palmityl, stearyl, and oleyl alcohols lead to products with lipid chain lengths of C32 or C36. Oleyl alcohol is the preferred substrate leading to 45 g L−1 of the double unsaturated C36 SL with S. bombicola and 20 g L−1 with C. kuoi. Scale up from shake flask to 1.5 L fermentations is possible and 65 g L−1 long‐chain SLs are obtained with S. bombicola within 7 days. Mixed feeding of oleic acid and a variety of fatty alcohols leads to new long‐chain SLs. In the presence of oleic acid the yeasts do not oxidize the fatty alcohol and thus the production of biosurfactants with tailored chain length is possible. The long‐chain SLs show good emulsification ability of water/paraffin oil mixtures at low energy input and reduced interfacial tension significantly.
Practical Applications: Sophorolipids are produced by fermentation on industrial scale focusing on cleaning and detergent applications. Mainly lactonic or anionic open‐chain forms are used today. The new long‐chain SLs presented in this manuscript are accessible with existing production technology and can be produced with high titers from cost‐efficient renewable raw materials. In contrast to the commercial products the long‐chain SLs are more hydrophobic and exhibit a strong emulsification behavior. Therefore they have the potential to broaden the application range of SLs in future. They may be useful as novel emulsifiers for cosmetic creams and lotions, pharmaceutical ointments and food products or may find application in oil spill remediation.
Development of renewable energy projects within photovoltaic energy sector has reached unrestrainable pace in recent years and thus the investors are more vigilantly considering the further business deployment towards this sector. Underpinned with clear support from KfW Development Bank, the company MACS Energy & Water GmbH decided to facilitate future verification of credit lines towards these projects by deploying special eSaveTM software which would include technical and financial appraisals specially designed for their clients. Hereof this thesis comprises the initial phase development of this software within the MS Excel and endeavors to provide a proper guideline for the software engineers included in this task in the company. In order to simplify the explanation process this report sticks to 50 kW power plant project in Prokuplje. It is anticipated that this model would enhance, improve and expedite the feasibility analysis between the cooperatives by delivering the projections of energy yield, payback periods and sensitivity analysis of the loan conditions specified for the target country and PV projects in the same. However, besides this main task this report aims to fulfill all the other necessary prerequisites for accomplishing a good due diligence practice. Therefore the thesis places its focus to Republic of Serbia where exceptional due diligence reports were made, among which the Prokuplje project, and compiles the assessments in terms of legal, environmental and risk into one general framework for PV projects in this country. By doing so, the desktop-based model and results obtained with this user-friendly tool can lean on the full due diligence assessment and provide the reader a clear comprehensive overview of possibility to invest into this renewable energy sector in Republic of Serbia.
Keywords: PV, Due diligence, Serbia, eSaveTM, feasibility, model
This is the fifth time that TH Köln has conducted this study to examine the local XR industry´on behalf of Mediencluster NRW GmbH, a subsidiary of Film- und Medienstiftung NRW. Aside from the two surveys on the North Rhine-Westphalian sector, there have now been three studies on the nationwide XR (extended or cross reality) sector in Germany. By this we mean all companies that create products and services in the field of virtual, mixed or augmented reality (but not firms that employ XR as users).
In this work, we propose a novel data-driven approach to recover missing or corrupted motion capture data, either in the form of 3D skeleton joints or 3D marker trajectories. We construct a knowledge-base that contains prior existing knowledge, which helps us to make it possible to infer missing or corrupted information of the motion capture data. We then build a kd-tree in parallel fashion on the GPU for fast search and retrieval of this already available knowledge in the form of nearest neighbors from the knowledge-base efficiently. We exploit the concept of histograms to organize the data and use an off-the-shelf radix sort algorithm to sort the keys within a single processor of GPU. We query the motion missing joints or markers, and as a result, we fetch a fixed number of nearest neighbors for the given input query motion. We employ an objective function with multiple error terms that substantially recover 3D joints or marker trajectories in parallel on the GPU. We perform comprehensive experiments to evaluate our approach quantitatively and qualitatively on publicly available motion capture datasets, namely CMU and HDM05. From the results, it is observed that the recovery of boxing, jumptwist, run, martial arts, salsa, and acrobatic motion sequences works best, while the recovery of motion sequences of kicking and jumping results in slightly larger errors. However, on average, our approach executes outstanding results. Generally, our approach outperforms all the competing state-of-the-art methods in the most test cases with different action sequences and executes reliable results with minimal errors and without any user interaction.
Online-measurement systems for agricultural and industrial AD plants – A review and practice test
(2014)
Online-measurement systems for AD plants in general are crucial to allow for detailed and comprehensive process monitoring and provide a basis for the development and practical application of process optimisation and control strategies.
Nevertheless, the online measurement of key process variables such as Volatile Fatty Acids (VFA) and Total Alkalinity (TA) has proven to be difficult due to extreme process conditions. High Total Solids (TS) concentrations and extraneous material often damage the sensors or have a strong negative impact on measurement quality and long-term behaviour.
Consequently, there is a need for new robust and accurate online-measurement systems.
The purpose of this paper is to give an overview of existing online-measurement systems, to present the current state of research and to show the results of practice tests at an agricultural and industrial AD plant. It becomes obvious that a broad variety of measurement solutions have been developed over the past few years, but that the main problem is the upscaling from lab-scale to practical application at full-scale AD plants. Results from the practice tests show that an online-measurement of pH, ORP, TS is possible.
Diskussionen über Gleichwertigkeitsbeschlüsse und bilateral ausgehandelte Abkommen wie z. B. das Covered Agreement zur Regelung des Betriebs von Rückversicherungsgeschäft zwischen der EU und den Vereinigten Staaten könnten für international tätige Versicherungsgruppen zukünftig der Vergangenheit angehören. Als Vereinigung von Versicherungsbehörden aus über 200 Ländern arbeitet die International Association of Insurance Supervisors (IAIS) seit 2013 an der Entwicklung eines risikobasierten, global anwendbaren Kapitalstandards (Insurance Capital Standard – ICS). Übergeordnetes Ziel ist die Schaffung eines übergreifenden Regulierungsrahmens für große international tätige Versicherungsgruppen mit Mindeststandards für die Bewertung von Risiken und daraus resultierenden Anforderungen an die Kapitalausstattung.
Es liegt in der Natur der Sache, dass bei der Entwicklung eines globalen Kapitalstandards die Interessen aus vielen verschiedenen Jurisdiktionen mit unterschiedlichen Systemen aufeinandertreffen (insbesondere trifft die verschiedenen Aufsichtsregime aus Europa und den Vereinigten Staaten aufeinander). Das IAIS hat sich zum Ziel gesetzt, die Interessengruppen zusammen zu bringen und ohne die lokalen Aufsichtsregime in den Jurisdiktionen auszuklammern, einen globalen Mindestkapitalstandard für international tätige Versicherungsgruppen zu entwickeln.
Der ICS wird im Rahmen der Konsolidierungsmethode berechnet und weist daher viele Ähnlichkeiten mit Solvency II auf. Der US Alternativansatz wird im Rahmen der Aggregationsmethode berechnet und soll ähnliche Ergebnisse zur Konsolidierungsmethode liefern.
Am Ende stellt sich für die europäischen (Rück-)Versicherungsunternehmen die Frage, ob man akzeptiert, dass US Ansatz äquivalent zum ICS ist, um das Ziel eines globalen Kapitalstandards als Level Playing Field zu etablieren.