Refine
Has Fulltext
- no (145)
Year of publication
- 2019 (145) (remove)
Document Type
- Other (145) (remove)
Language
- English (145) (remove)
Is part of the Bibliography
- yes (145)
Keywords
- evaluation (3)
- Cloud Computing (2)
- Industry 4.0 (2)
- Scrum (2)
- Social Media Analysis (2)
- Teamwork (2)
- Virtual Machine (2)
- fabrication (2)
- retrospective (2)
- software process improvement (2)
Institute
- Hasso-Plattner-Institut für Digital Engineering GmbH (30)
- Institut für Physik und Astronomie (19)
- Hasso-Plattner-Institut für Digital Engineering gGmbH (17)
- Institut für Biochemie und Biologie (16)
- Department Psychologie (12)
- Institut für Geowissenschaften (9)
- Department Sport- und Gesundheitswissenschaften (4)
- Institut für Ernährungswissenschaft (4)
- Institut für Informatik und Computational Science (4)
- Institut für Umweltwissenschaften und Geographie (4)
- Department Linguistik (3)
- Fachgruppe Politik- & Verwaltungswissenschaft (3)
- Institut für Mathematik (3)
- Sozialwissenschaften (3)
- Institut für Anglistik und Amerikanistik (2)
- Institut für Chemie (2)
- Department Grundschulpädagogik (1)
- Department Musik und Kunst (1)
- Fachgruppe Betriebswirtschaftslehre (1)
- Fachgruppe Soziologie (1)
- Historisches Institut (1)
- Institut für Germanistik (1)
- Institut für Jüdische Studien und Religionswissenschaft (1)
- Institut für Jüdische Theologie (1)
- Institut für Philosophie (1)
- Wirtschaftswissenschaften (1)
Already for decades it has been known that the winds of massive stars are inhomogeneous (i.e. clumped). To properly model observed spectra of massive star winds it is necessary to incorporate the 3-D nature of clumping into radiative transfer calculations. In this paper we present our full 3-D Monte Carlo radiative transfer code for inhomogeneous expanding stellar winds. We use a set of parameters to describe dense as well as the rarefied wind components. At the same time, we account for non-monotonic velocity fields. We show how the 3-D density and velocity wind inhomogeneities strongly affect the resonance line formation. We also show how wind clumping can solve the discrepancy between P v and H alpha mass-loss rate diagnostics.
The ability to work in teams is an important skill in today's work environments. In MOOCs, however, team work, team tasks, and graded team-based assignments play only a marginal role. To close this gap, we have been exploring ways to integrate graded team-based assignments in MOOCs. Some goals of our work are to determine simple criteria to match teams in a volatile environment and to enable a frictionless online collaboration for the participants within our MOOC platform. The high dropout rates in MOOCs pose particular challenges for team work in this context. By now, we have conducted 15 MOOCs containing graded team-based assignments in a variety of topics. The paper at hand presents a study that aims to establish a solid understanding of the participants in the team tasks. Furthermore, we attempt to determine which team compositions are particularly successful. Finally, we examine how several modifications to our platform's collaborative toolset have affected the dropout rates and performance of the teams.
While the IEEE 802.15.4 radio standard has many features that meet the requirements of Internet of things applications, IEEE 802.15.4 leaves the whole issue of key management unstandardized. To address this gap, Krentz et al. proposed the Adaptive Key Establishment Scheme (AKES), which establishes session keys for use in IEEE 802.15.4 security. Yet, AKES does not cover all aspects of key management. In particular, AKES comprises no means for key revocation and rekeying. Moreover, existing protocols for key revocation and rekeying seem limited in various ways. In this paper, we hence propose a key revocation and rekeying protocol, which is designed to overcome various limitations of current protocols for key revocation and rekeying. For example, our protocol seems unique in that it routes around IEEE 802.15.4 nodes whose keys are being revoked. We successfully implemented and evaluated our protocol using the Contiki-NG operating system and aiocoap.
This is a correction notice for ‘Post-adiabatic supernova remnants in an interstellar magnetic field: oblique shocks and non-uniform environment’ (DOI: https://doi.org/10.1093/mnras/sty1750), which was published in MNRAS 479, 4253–4270 (2018). The publisher regrets to inform that the colour was missing from the colour scales in Figs 8(a)–(d) and Figs 9(a) and (b). This has now been corrected online. The publisher apologizes for this error.
Editorial
(2019)
Introduction
(2019)
Over the past decades, it has become more and more obvious that ongoing globalisation processes have substantial impacts on the natural environment. Studies reveal that intensified global economic relations have caused or accelerated dramatic changes in the Earth system, defined as the sum of our planet’s interacting physical, chemical, biological and human processes (Schellnhuber et al. 2004). Climate change, biodiversity loss, disrupted biogeochemical cycles, and land degradation are often cited as emblematic problems of global environmental change (Rockström et al. 2009; Steffen et al. 2015). In this context, the term Anthropocene has lately received widespread attention and gained some prominence in the academic literature