FEMTOSPEX Molecules and Surfaces: Electron spectroscopy setup for time-resolved laser-pump/ X-ray-probe experiments at BESSY II

The flexible end station “FEMTOSPEX Molecules and Surfaces”, which will enable time resolved photoemission studies in the future at HZB, is presented

Establishing Islam in Sweden: The First Tatar Community and Muslim Congregation and Their Sources

This article focuses on the history and establishment of the first Muslim congregation and organisation in Sweden, Turk-Islam Föreningen i Sverige för Religion och Kultur (Turk-Islamic Association for Religion and Culture), which was founded in the late 1940s by a small group of immigrants and refugees of Tatar and Turkish origin. The community has been the object of earlier research (see Svanberg & Westerlund 1999; Ståhlberg & Svanberg 2016; Sorgenfrei 2018) but the following is a first attempt to describe the historical background of the Tatars in Sweden through systematic archival work. The article thus aims at being also an orientation to the archival and private sources of the group and their organization and to point out some topics of interest for further research

Recent Advances in CubeSat Swarm Technologies

This is a presentation that summarizes some of the work we are doing at NASA Ames in the area of small spacecraft, with an emphasis on swarm mission technologies. The presentation will be given at the Washington State University Aerospace Careers Day

Salafi Sufism? : Islamic border-keeping in contemporary Sufism

The aim of this article is to analyse a local expression of the transnational Ahbash Sufi movement in light of recent scholarship on the relationship between Salafism and Sufism as well as Islamic neo-traditionalism. Some researchers have reacted against a dichotomous relationship between fundamentalism and Sufism, instead suggesting a continuum and a mutual interdependence. We aim to contribute to a developed understanding of the process whereby some Sufi actors go on the attack against their Islamic foes by publicly and loudly claiming to represent ‘true Islam’ as found in the ‘fundamentals’ of Islam – but with a different understanding of what those fundamentals are. We analyse a series of interviews with a local representative of the transnational Ahbash Sufi movement in Malmö, Sweden; the Ahbash movement has its central leadership in Lebanon. Through discussing the representative’s understanding of ‘good’ and ‘bad’ bidʿa, in particular concerning the celebration of the prophet Muhammad’s birthday (mawlid al-nabi), we note a combined emphasis on authoritative textual sources – including the Qurʾan and hadith literature – and the allegedly unbroken traditional knowledge transmission which secures a correct understanding of Islam. This shows an ambiguous space of Islamic thought and practice, an arguably Salafi-affected neo-traditionalist defense of Sufism, which transgresses commonly employed dichotomies between Salafism and Sufism

Interaction Processes in Collaborative Learning Networks: A Social Interdependence Perspective

Information systems and communication tools such as online discussions forums are increasingly replacing traditional instructor-led learning methods with collaborative learning networks. Collaborative learning networks emphasize the distributed nature of learning and community-based sharing of knowledge, where people connect and collectively contribute knowledge to a learning community. However, the value realized through collaborative learning depends on social interaction processes that take place among members of a learning network. The aim of this paper is to present our ongoing research on social interaction processes, their determinants, and their effects on individual and group learning performance. We investigate the role of different social interaction processes in collaborative learning networks, where students’ learning is derived from (instead of with) the learning community. As a result, we aim to offer theoretical insights into how collaborative learning networks enhance the learning outcomes of both the individual and group

A Comparison of Thruster Implementation Strategies for a Deep Space Nanosatellite

Attitude control for very small spacecraft, commonly referred to as nanosatellites or CubeSats, has traditionally been carried out using reaction wheels and magnetic torquers as the primary actuators. However, as these spacecraft begin to be considered for a broader range of scientific applications, including some beyond low Earth orbit, it has become necessary to also consider thruster systems for actuation. In recent years a number of thruster designs that conform to the mass, volume, and power constraints of nanosatellites have become commercially available, including cold gas systems, pulsed plasma thrusters (PPTs), and micro-electrospray propulsion (MEP) systems. The challenge now facing the nanosatellite community is to determine which thruster solutions are appropriate for a particular application, and what the best method of control might be. This paper will compare the implementation of a cold gas system with that of an MEP or PPT system for an upcoming nanosatellite mission using a previously reported saturation-restricted control law. Results are presented for this controller both with and without a fuel-optimal thruster allocation scheme, and an assessment on incorporating these technologies in an upcoming NASA mission is offered

Editorial

Editorial for Vol. 12, Issue

LowDosePES: the low-dose photoelectron spectroscopy end-station at the PM4 beamline at BESSY II

A brief description of the main equipment at the Low Dose PhotoElectron Spectroscopy end-station is given, and a few possible applications highlighted

The Impact of Learner Control on E-Learning Effectiveness: Towards a Theoretical Model

E-learning systems are changing education and organizational training considerably. With the advancement of online-based learning systems, learner control of the instructional process has emerged as a decisive factor inherent to technology-based learning. However, the conceptual work on the role of learner control in e-learning has not advanced sufficiently to predict how learner control impacts e-learning effectiveness. To extend the research on the role of learner control in e-learning, we derive a conceptual framework as a reference model, which is based on cognitive and motivational learning theories. We then apply our framework to review 58 articles on learner control during the period 1996-2013. Our findings reveal how different individual characteristics, as well as the characteristics of the course and learning environment moderate the impact of learner control on learning effectiveness. Our analysis provides new insight into the role of learner control for e-learning effectiveness, as well as directions for further research

Formindskes grundvandsreserven?

Formindskes grundvandsreserven