Variability and Evolution in Systems of Systems

In this position paper (1) we discuss two particular aspects of Systems of Systems, i.e., variability and evolution. (2) We argue that concepts from Product Line Engineering and Software Evolution are relevant to Systems of Systems Engineering. (3) Conversely, concepts from Systems of Systems Engineering can be helpful in Product Line Engineering and Software Evolution. Hence, we argue that an exchange of concepts between the disciplines would be beneficial.Comment: In Proceedings AiSoS 2013, arXiv:1311.319

CASE Tool support for variability management in software product lines

Software product lines (SPL) aim at reducing time-to-market and increasing software quality through extensive, planned reuse of artifacts. An essential activity in SPL is variability management, i.e., defining and managing commonality and variability among member products. Due to the large scale and complexity of today’s software-intensive systems, variability management has become increasingly complex to conduct. Accordingly, tool support for variability management has been gathering increasing momentum over the last few years and can be considered a key success factor for developing and maintaining SPLs. While several studies have already been conducted on variability management, none of these analyzed the available tool support in detail. In this work, we report on a survey in which we analyzed 37 existing variability management tools identified using a systematic literature review to understand the tools’ characteristics, maturity, and the challenges in the field. We conclude that while most studies on variability management tools provide a good motivation and description of the research context and challenges, they often lack empirical data to support their claims and findings. It was also found that quality attributes important for the practical use of tools such as usability, integration, scalability, and performance were out of scope for most studies

Doldrum

Doldrum is a VR rhythm game that provides the player with a sense of flow and a feeling of triumph as they overcome a towering boss. The game mixes traditional rhythm game elements with reaction-based combat. The player battles a villainous, animated Cuckoo Boss via beating on a mystical xylophone. They must keep rhythm, avoid enemy attacks, and perform specific actions to combat their opponent

DOLDRUM

Doldrum is a VR rhythm game that provides the player with a sense of flow and a feeling of triumph as they overcome a towering boss. The game mixes traditional rhythm game elements with reaction-based combat. The player battles a villainous, animated Cuckoo Boss via beating on a mystical xylophone. They must keep rhythm, avoid enemy attacks, and perform specific actions to combat their opponent

Improving the acute and perioperative hemodynamic assessment

First, this thesis aimed to extend the evidence on the applicability of hemodynamic monitoring during the perioperative period and after admission to the ICU. Second, we aimed to gain knowledge on how to improve the conduct of studies in perioperative and critical care medicine.We provided an overview of the current evidence for hemodynamic monitoring in perioperative goal-directed therapy. We showed that the studies on this subject showed clinical heterogeneity and risk of bias. Extension of all aspects of hemodynamic monitoring was considered in this thesis. A study was performed on the educated guess of physicians when estimating cardiac output using clinical examination to help improve the reliability of the clinical examination. We showed that physicians at the bed-side mainly consider mottling score and norepinephrine dose when estimating cardiac output. In another study, we demonstrated that blood pressure measurements differ when measured invasively or non-invasively and that these differences may have clinical consequences. We also showed that echocardiography could be performed by novices, but experts are needed to interpret obtained images. We demonstrated that cardiac output measurements vary in critically ill patients when measured with echocardiography or uncalibrated pulse wave analysis.For the second part of this thesis, we demonstrated that various mortality prediction models exist for critically ill patients. Quality of methodology often lacks for these models, and improvements have to be made to help patient care. To help improve the quality of studies, we finally propose that study protocols are prepublished and made available for peer-review before conduct