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In dieser Bachelorarbeit werden Modelle, mit einer hohen Anzahl an Vertices, mittels CPU und GPU geclustered und die Performance der hierzu verwendeten Algorithmen miteinander verglichen. Die Nutzung der GPU findet hierbei unter Verwendung von OpenGL statt. Zunächst werden Grundlagen von Clustering, die für die später implementierten Algorithmen wichtig sind, geklärt. Zusätzlich werden Prozesse erkärt mit denen die Ergebnisse der, auf der GPU ausgeführten, Algorithmen, auf die CPU zurückgeführt werden können. Anschließend erfolgt eine Beschreibung der implementierten Algorithmen sowie eine Erklärung ihrer Funktionsweise. Abschließend wurde ein Benchmarking der Algorithmen vorgenommen, um ihre Laufzeiten miteinander zu vergleichen.
Students of computer science studies enter university education with very different competencies, experience and knowledge. 145 datasets collected of freshmen computer science students by learning management systems in relation to exam outcomes and learning dispositions data (e. g. student dispositions, previous experiences and attitudes measured through self-reported surveys) has been exploited to identify indicators as predictors of academic success and hence make effective interventions to deal with an extremely heterogeneous group of students.
We propose and create a new data model for learning specific environments and learning analytics applications. This is motivated from the experience in the Fiber Bundle Data Model used for large - time and space dependent - data. Our proposed data model integrates file or stream-based data structures from capturing devices more easily. Learning analytics algorithms are added directly to the data, and formulation of queries and analytics is done in Python. It is designed to improve collaboration in the field of learning analytics. We leverage a hierarchical data structure, where varying data is located near the leaves. Abstract data types are identified in four distinct pathways, which allow storing most diverse data sources. We compare different implementations regarding its memory footprint and performance. Our tests indicate that LeAn Bundles can be smaller than a naïve xAPI export. The benchmarks show that the performance is comparable to a MongoDB, while having the benefit of being portable and extensible.