Find, understand, and extend development screencasts on YouTube

Abstract

A so ware development screencast is a video that captures the screen of a developer working on a particular task while explaining its implementation details. Due to the increased popularity of so ware development screencasts (e.g., available on YouTube), we study how and to what extent they can be used as additional source of knowledge to answer developer's questions about, for example, the use of a speci c API. We rst di erentiate between development and other types of screencasts using video frame analysis. By using the Cosine algorithm, developers can expect ten development screencasts in the top 20 out of 100 di erent YouTube videos. We then extracted popular development topics on which screencasts are reporting on YouTube: database operations, system set-up, plug-in development, game development, and testing.Besides, we found six recurring tasks performed in development screencasts, such as object usage and UI operations.Finally, we conducted a similarity analysis by considering only the spoken words (i.e., the screencast transcripts but not the text that might appear in a scene) to link API documents, such as the Javadoc, to the appropriate screencasts. By using Cosine similarity, we identi ed 38 relevant documents in the top 20 out of 9455 API documents.

Finding Users’ Voice on Social Media: An Investigation of Online Support Groups for Autism-Affected Users on Facebook

“…To identify the optimal number of topics as the K parameter, which is the number of topics in the model training process, interactive visualization methods (pyLDAvis package imported in Python) were employed to evaluate produced models. Using the methods applied in a previous study [18], the number of LDA topics was tuned until it reached a set of non-overlapping clusters that had sufficient distance between each other. The parameter of K was given for a series of descending numbers to train the model until the circles representing the topics became separated without any significant overlapping.…”

“…The authors stopped searching for the optimal number of the topics when the circles did not overlap anymore. The size of the circles represents the popularity of the topic within the overall set of topics [18].…”

Effektives Lehren und Lernen in der Informatik, Wirtschaftsinformatik und verwandten Fachgebieten

“…Lehr-und Lernmethode: Audio-Visuell (Effektivität: 20 %). Es können Videos zur Informatik [14,15] erstellt oder herangezogen werden. Hierbei sollte auch wieder Konkretes Abstraktem vorgezogen werden und der Unterricht ergänzt werden [14].…”

Umschulung zum IHK-Fachinformatiker in Anwendungsentwicklung und Systemintegration

“…Die Teilnehmer waren arbeitslos gemeldet und wurden alle über den Bildungsgutschein [1,19] [21,22]. Das Praxisprojekt wird in einen ähnlichen Arbeitskontext absolviert, in dem die Teilnehmer später arbeiten werden, um sich somit leichter an die Lehrinhalte zu erinnern [23] und arbeiten zu können [24][25][26][27]. Wir haben ein Praxisprojekt angeboten, das den Schülern möglichst bekannt erscheint, wie zum Beispiel die Gestaltung einer Datenbank [28, S. 159], [29] für eine E-Commerce [28, S. 305…”