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Institute
In the following study the properties of the superabsorbent polymer Broadleaf P4 were investigated according to the aim to apply that polymer within constructed wetlands. The application of the polymer in constructed wetlands shall result in an improvement of the removal of pesticides. For that the polymer was given into lab-scale wetlands together with pumice and were compared to a control wetland, which was filled with gravel. The wetlands were running for several weeks in which the nutrient removal was recorded. The polymer was also tested according to its property to adsorb the pesticides before adding the pesticides to the wetland beds.
In this thesis, we implement, correct, and modify the compartmental model described in “Transmission Dynamics of Large Coronavirus Disease Outbreak in Homeless Shelter, Chicago, Illinois, USA, 2020”. Our objective is to engage in reading and understanding scientific literature, reproduce the results, and modify or generalize an existing mathematical model. We provide an overview of epidemiological models, focusing on simple compartmental SEIR models. We correct inaccuracies and misprints in the original implementation and use the limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm to fit the model’s parameters. Furthermore, we modify the model by introducing an additional compartment. The resulting model has a more intuitive interpretation and relies on fewer assumptions. We also perform the fitting process for this alternative model. Finally, we demonstrate the advantages of our modified implementations and discuss other possible approaches.
Tokenization projects are currently very present when it comes to new blockchain technologies. After explaining the fundamentals of cross-chain interaction, the bachelor thesis will focus on tokenizing technology for Bitcoin on Ethereum. To get a more practical context, implementing the currently most successful decentralized tokenization project is described.
In this work a new method for the prediction of the Xaa-proline (where Xaa is any amino acid) cis/trans isomerization was investigated. By extraction of twelve structural features (real secondary structure, inside/outside classification, properties of the environment around proline and proline itself) a support vector machine (SVM) based prediction approach was evolved. The Java software Xaa-PIPT for structural feature extraction was developed. Based on 4397 (2199 cis and 2198 trans) prolines extracted from non-redundant, globular proteins a classifier was trained using the radial basis function (RBF) kernel. In ten-fold cross-validation it achieved an accuracy of 70.0478 % and a Matthews correlation coefficient (MCC) of 0.4223, a sensitivity of 0.5433 and a specificity of 0.8576. Based on this classifier a lightweight and easy-to-use Java software tool, called m Xaa-PIPT, for the prediction of the Xaa-proline cis/trans isomerization was devel-oped. It was shown that there are correlations between the proline surrounding environment and the isomerization state. m Xaa-PIPT can be used for the evaluation of low-resolution protein structures and theoretical models to improve their quality by the prediction of the Xaa-proline isomerization.
The Media System of Malawi
(2010)
nicht vorhanden
The research of this thesis aims to analyze how a specific CSR approach from the Adidas Group on sustainability is perceived globally based on an analysis of the movements on the stock market combined with a sentiment analysis of tweet activities on Twitter. The thesis analyzed both positive feedback and critic from customers worldwide regarding the approach and other initiatives from the Adidas Group and their partner Parley for the Oceans, a non-governmental organization working towards a more sustainable world.
This paper set out to determine what the effect of daily internet usage on a short attention span was and whether this had an effect on academic performance. As described briefly in the introduction this paper consisted of laying the groundwork through defining the relevant terminology, applying the methodology to the Hypotheses and making conclusive statements.
Two Hypotheses were presented to give the paper the aim. While Hypothesis 1 can be proven true through the two-step terminology applied, Hypothesis 2 does not stand up to the scrutiny. For lack of sufficient and specific evidence, the only conclusive statement that can be made regarding it is that it is untrue.
Approx. 80% of the population sample analysed were between the age of 19 – 30 which automatically reduces the analysis, extrapolations and scientific statements to a more specific age group. The other ages represented were almost all above, meaning that the findings could not accurately be applied to older age groups.
Nonetheless, the data collected was accurate and good be applied to prove Hypothesis 1, meaning that daily internet usage breeds and invites a short attention span. For lack of a fitting data collection method, physcial, social, mental factors along with motivation of an individual make up his academic performance. These were factors that could not be taken into consideration.
Conclusively, the author predicts that a present internet connection coupled with the growing popularity of digital technology attention spans will contin ue to stay as short as they are. Individuals will find ways to direct their short attention span where it is needed and apply it as necessary.
Where does the cocoa, which we consume on a regular basis, come from? Supply chains are not always transparent, much less easily comprehensible. The cocoa industry faces ongoing challenges. Whether it be the chocolate manufacturers’ promise to maintain a sustainable and ethical supply chain, the minimal impact on the environment or the maximum adherence to human rights in their production process. This paper revises important steps which lead to the compliance with UN standards and questions the role of consumers in the construct of ethical chocolate products.
This thesis proposes a solution to the practical problem of supervising relatively basic mechanic processes in robotics by means of computervision. Supervision happens by comparing the tracked movement with a known, ideal recording of the movement that acts as a model.
First, this thesis analyzes possible approaches to the problem regarding data structures and representation, ways of extracting the data from the recording and ways to compare the data sets of two recordings. Then, a specific solution is implemented in C++ and explained.
Success story DAB in the UK
(2017)
The popularity of digital audio broadcasting in different countries can be explained mainly by means of historical development. In this work, the general technical conditions are explained and the mode of operation is explained. In addition, advantages, disadvantages and alternatives are presented. After that, the development of the digital radio in Germany and the UK is compared with the current situation in order to show how the differences have led to a different distribution and acceptance of the medium.