John Creagh

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Models offer visual support for analyzing complex domains such as business processes and information systems. In both cases, models are developed using graphical modelling languages. In our study we focus on usability evaluation of modelling languages for the model interpretation scenario. The study is based on a causal model of hypotheses, which was(More)
Eine Ermittlung der Benutzerfreundlichkeit im Sinne der Usability von Modellierungssprachen war bisher nicht Zielsetzung empirischer Evaluationsstudien. In den meisten Usabilitystudien wurden und werden Applikationen, Webseiten und technische Produkte evaluiert. Ziel dieses Beitrags ist die Schaffung eines Rahmenkonzeptes zur Bewertung der Usability von(More)
Documenting, specifying and analyzing complex domains such as information systems or business processes have become unimaginable without the support of graphical models. Generally, models are developed using graph-oriented languages such as Event Driven Process Chains (EPCs) or diagrams of the Unified Modeling Language (UML). For industrial use, modeling(More)
Clathrin facilitates vesicle formation during endocytosis and sorting in the trans-Golgi network (TGN)/endosomal system. Unlike in mammals, yeast clathrin function requires both the clathrin heavy (CHC) and clathrin light (CLC) chain, since Chc1 does not form stable trimers without Clc1. To further delineate clathrin subunit functions, we constructed a(More)
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