Fakultät Kommunikation und Umwelt
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Asylrecht im Grundgesetz
(2018)
Purpose: The present study aims to investigate the acute effects of mental practice on novices’ basketball free throw performance and their motor self-efficacy. Moreover, it is examined whether internal visual imagery combined with kinesthetic elements enhances performance more than external visual imagery.
Methods: In order to test the research questions, a sample of 61 participants who are currently not participating in any type of basketball program were assigned to one of the following three conditions with the help of the matched sample method: The internal visual imagery group with kinesthetic elements, the external visual imagery group, and the control group. The experimental interventions with a duration of 15 minutes (mental imagery internal or external or mathematic exercises) followed by physical practice were repeated three times in a row. Consequently, the basketball free throw enhancement was measured via the shot accuracy. The results were compared by using an ANOVA with repeated measurements. Changes in the participants’ motor self-efficacy were assessed via a pre- and a post-test of the MOSI (Wilhelm and Büsch, 2006).
Results: Results showed no significant differences between the groups, neither in the performance increase nor in the self-efficacy.
Conclusion: The current study can serve as a reference point to avoid overestimating the effectiveness of mental practice. Findings are discussed in terms of possible explanations and hints for future research are given.
Die Schleupen AG ändert ihre Entwicklungsarchitektur zu Continuous Delivery (CD). Continuous Delivery beschreibt eine Reihe von Vorgängen, die als Ziel eine schnelle und sichere Softwarebereitstellung haben. Am Ende der Umstellung wird das Unternehmen eine Ansammlung von automatisierten Schritten besitzen.
In dieser Bachelorarbeit wird ein Monitoringsystem entwickelt, das eine Überwachung des Continuous Delivery Prozesses ermöglicht. Die wesentlichen Ziele sind die Erstellung eines Dashboards und das Sammeln von Telemetriedaten.
The development of technologies that created FinTechs have brought new possibilities for customers into life that provide a quick and convenient handling of operations by covering various segments of the financial industry. However, the innovations also implicate drawbacks: Traditional banks may be threatened due to a loss of customers. This thesis evaluates to which extent this case can be measured by executing quantitative research methods as well as qualitative research methods for the purpose of gaining information from a bank’s perspective as well as opinions from customers. The result of this empirical study is that there is a certain correlation between the development of FinTechs and a threat caused by FinTechs although the latter is rather weak. Furthermore, this thesis indicates the knowledge of customers regarding FinTechs and their willingness to face said innovations.
The issue-area of organizational culture gained pertinence over the last few decades. Scientists found out that organizational culture has a significant impact on the success of organizations. Because of the fast-moving environment of companies, firms have to build up capabilities to react quickly to those environmental changes and adapt. Adapting means changing and as the culture of an organization is the fundamental base it has to change, too.
Deduced from that development in science this paper investigates methods to change organizational culture and evaluates which of these methods are sensible to do so. The interventions Laboratory Training, Survey Feedback and Process Consultation are compared by assessing studies that tested the effect of those methods.
The results of that comparison show that all three intervention types are useful to change organizational culture but for different cultural aspects and in different stages of the change process. Laboratory Training should be applied at the beginning of the change process in order to change attitude and strengthen the commitment to change. Survey Feedback should be used whilst developing the new culture to obtain feedback from employees and increase their involvement in the change process. Finally Process Consultation can support the implementation of the new culture in specific departments. Because these findings are mostly based on older studies, future research should focus on newer methods and explicit on methods to change culture.
Untersuchung der Vorgehensweise ausgewählter Internetplattformen gegen gefälschte Online-Bewertungen
(2018)
Diese Arbeit dokumentiert ein Experiment zur Untersuchung des Umgangs von Facebook, Google Maps, Google Play Store und Zalando mit gefälschten Bewertungen („Opinion Spam“). Es wurde untersucht, ob die Plattformen im Rahmen dieser Arbeit abgegebene gefälschte Bewertungen veröffentlichen. Dazu wurden je Plattform 24 unterschiedlich authentisch wirkende Konten erstellt. Mit diesen wurden je 48 gefälschte Bewertungen nach folgenden Kriterien abgegeben: 1) Kopierte Produkt-/Ortsbeschreibung oder Werbesprache 2) Aussagen ohne Produkt-/Ortsbezug oder inhaltliche Fehler 3) Blindtexte oder sehr viele Rechtschreibfehler 4) eine Meinung verknüpft mit der Aussage, dass der Bewertende das Produkt/den Ort nicht kennt. Innerhalb von 14 Tagen wurde mehrmals überprüft, ob eine Bewertung freigeschaltet oder gelöscht wurde.
Bei Facebook wurden 6,7% der abgegebenen Bewertungen innerhalb der ersten 14 Tage gelöscht. Nachdem die verbleibenden Bewertungen der Plattform gemeldet wurden, waren es 47,7%. Bei Google Maps wurden 4,2% entfernt, im Google Play Store 12,5% (bei beiden keine Änderung durch Melden). Bei Zalando (kein Melden möglich) war die eigenständige Löschquote mit 43,8% mit Abstand am höchsten. Besonders häufig wurden im Experiment Blindtexte gelöscht. Positive und negative Bewertungen wurden nahezu gleich oft entfernt. Bewertungen von Konten mit simulierter Nutzerinteraktion wurden häufiger gelöscht als Bewertungen von Konten ohne Nutzerinteraktion.
Das Experiment hat gezeigt, dass sehr viele gefälschte Bewertungen, die eindeutig den Richtlinien der Plattformen widersprechen, nicht gelöscht wurden. Deren Sichtbarkeit variiert allerdings je nach Plattform und Produkt/Ort stark. Der Aufwand für die Erstellung vieler Konten bei den Diensten ist überschaubar. Wenn Nutzer gefälschte Bewertungen nach den im Experiment untersuchten Kriterien abgeben wollen, werden sie von den Plattformen daran wenig gehindert.
The German logistics company Schenker AG categorizes its customers into so-called vertical markets. For instance; category “Automotive” is assigned to car manufacturer BMW AG. The classification allows the company to evaluate its revenue and profits on different customer segments which, in turn, has an impact on Schenker’s strategic planning.
Until now the assignment is carried out manually which means that someone from sales department should perform some research on a customer’s public profile whenever a new customer is registered in the database. With the rapid growth of global trade in recent years and Schenker’s expansion to the Asian market with thousands of new customers the manual approach is no longer sustainable in a global market.
This thesis provides an alternative solution based on scraping customer data available in the web and classification of the extracted content. We deal with three significant difficulties: find web data related to a given customer name (we do have a company name but no homepage URL in Schenker database), extract a predictive portion of the data without introducing too much noise and, finally, set up a classification algorithm. Most importantly, the whole process needs to be implemented automatically.
For the classification task, we have identified two tree-based classification algorithms random forest and extreme gradient boosting (xgboost). Random forest performs better by using package ranger with an overall 52% accuracy and 87.8% multiclass area under the curve. On the other hand, xgboost takes less time to compute, but the accuracy is poor as compared to random forest.