Enhancing self-regulated learning by writing learning protocols     

Matthias Nückles  Sandra Hübner  Alexander Renkl 《Learning and Instruction》2009,19(3):259-271

Learning protocols are a self-guided way of writing that allows for elaboration and reflection on learning content. In an experimental study (N = 103), we supported protocol writing with prompts to elicit important strategies as postulated by a cyclical model of self-regulated learning. Students received either (a) no prompts, (b) cognitive prompts, (c) metacognitive prompts, (d) mixed prompts without, or (e) including prompts for planning of remedial strategies. Prompting all essential sub-processes of self-regulated learning (group e) fostered students' comprehension best. Thus, with appropriate support, writing can serve as a beneficial medium helping students to self-regulate their understanding of subject matter.  相似文献   

Hematocrit and flow rate regulate the adhesion of platelets to von Willebrand factor     

Hsieh Chen  Jennifer I. Angerer  Marina Napoleone  Armin J. Reininger  Stefan W. Schneider  Achim Wixforth  Matthias F. Schneider  Alfredo Alexander-Katz 《Biomicrofluidics》2013,7(6)

Primary hemostasis and blood clotting is known to be influenced by the red blood cell volume fraction (hematocrit) in blood. Depressed or elevated levels of red blood cells can lead to vascular perfusion problems ranging from bleeding to thrombus formation. The early stage of hemostasis and thus blood clotting in all vessel sections from the arterial to the venous system involves the adhesion of platelets to von Willebrand factor. Here we present experimental and theoretical results showing that the adhesion probability of platelets to von Willebrand factor is strongly and nonlinearly dependent on hematocrit and flow rate. Interestingly, the actual binding forces are not markedly different, which suggest that the origin of such behavior is in the distribution of platelets. Using hydrodynamic simulations of a simple model, we explicitly show that the higher the hematocrit and the flow rate, the larger the amount of platelets residing close to the wall. Our simulation results, which are in excellent agreement with the experimental observations, explain why such phenomena occur. We believe that the nonhomogeneous red blood cell distribution as well as the shear dependent hydrodynamic interaction is key for the accumulation of platelets on the vessel wall. The work we present here is an important step forward from our earlier work on single molecules and extends into the collective cellular behavior of whole blood. It sheds new light on the correlation between hematocrit and the initial steps in hemostasis and thrombosis, and outlines advances for the treatment of vascular diseases associated with high levels of red blood cells. These results are not only highly relevant for the field of hemostasis and the physics of blood clotting but are also of powerful impact in applied science most obviously in drug delivery and colloidal science.  相似文献   

Four histories about early Dutch football 1910-1920     

Matthias de Heer  Jacco van Sterkenburg 《Soccer & Society》2019,20(3):562-564

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Chronisch obstruktive Lungenerkrankung (COPD)     

Matthias Urban  Otto Chris Burghuber 《Wiener klinische Wochenschrift Education》2018,13(1-4):29-47

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Dependency-based IT Governance practices in inter-organisational collaborations: A graph-driven elaboration     

Novica Zarvić  Carl Stolze  Matthias Boehm  Oliver Thomas 《International Journal of Information Management》2012

In an ever more globalised world IT (Information Technology) managers increasingly have to support value creation within inter-organisational collaboration settings. Such organisational forms with their inherent complexity require specific approaches for their IT management within. Especially important for unleashing the chances of networked arrangements is the right form of IT Governance. Choosing the right arrangement for IT Governance is heavily dependent on understanding the concepts on which such business constellations are built. In this paper we provide therefore first a systematically derived, graph-based perspective on the key terms of inter-organisational collaboration. Based on this understanding of concepts and structured representations of inter-organisational dependencies we present interorganisational governance practices for IT. Specifically, we assign accountabilities to top executive roles from both IT and business. By keeping a holistic perspective, the insights gained in this study are highly relevant for strategic information management in terms of Business-IT Alignment as well as monitoring and controlling of inter-organisational information infrastructures in a rapidly changing business environment.  相似文献   

Legitimizing research, technology and innovation policies for transformative change: Combining insights from innovation systems and multi-level perspective in a comprehensive ‘failures’ framework     

K. Matthias Weber  Harald Rohracher 《Research Policy》2012,41(6):1037-1047

The recent policy debates about orientating research, technology and innovation policy towards societal challenges, rather than economic growth objectives only, call for new lines of argumentation to systematically legitimize policy interventions. While the multi-level perspective on long-term transitions has attracted quite some interest over the past years as a framework for dealing with long-term processes of transformative change, but the innovation systems approach is still the dominant perspective for devising innovation policy. Innovation systems approaches stress the importance of improving innovation capabilities of firms and the institutional settings to support them, but they are less suited for dealing with the strategic challenges of transforming systems of innovation, production and consumption, and thus with long-term challenges such as climate change or resource depletion. It is therefore suggested to consider insights from transition studies more prominently in a policy framework that is based on the innovation systems approach and the associated notion of ‘failures’. We propose a comprehensive framework that allows legitimizing and devising policies for transformative change that draws on a combination of market failures, structural system failures and transformational system failures.  相似文献   

Modularisation approaches in Initial Vocational Education: evidence for policy convergence in Europe?     

Matthias Pilz  Junmin Li  Roy Canning  Sarah Minty 《Journal of Vocational Education & Training》2018,70(1):1-26

One response to challenges of national vocational training systems has been a move towards greater flexibility within vocational training systems. This article focuses on an investigation of modularisation as a tool for achieving this flexibility. Many European countries have introduced modular forms into their vocational training system. We investigate whether the global trends set out are producing policy convergence in modularisation in differing countries. This study selects seven European countries to make a detailed analysis and entailed an analysis of each country’s Initial Vocational Education and Training programmes. The methodology involved both primary and secondary data collection. The findings demonstrate policy convergence that can be attributed to similar challenges at national level. Modularisation in some countries takes a ‘radical’ form. Other countries have followed a mixed approach. It is clear that no two countries have adopted the same form of modularisation, although some countries have cited common challenges in the modularisation process.  相似文献   

The impact of global and local context information on the processing of deceptive actions in game sports     

Iris Güldenpenning  Mustafa Alhaj Ahmad Alaboud  Wilfried Kunde  Matthias Weigelt 《Sportwissenschaft》2018,48(3):366-375

In basketball, the defender’s reaction to a pass is slower and more error prone if the attacking player gazes into the opposite direction. This so-called head-fake effect might be modulated by context information, that is, the frequency and the sequence of head fakes occurring. Accordingly, the present study investigates the head-fake effect for different frequency proportions (20% vs. 50% vs. 80%). The results show that the head-fake effect decreases when the head fake occurs more often. Furthermore, a potential influence of previous fake experience (i.e., congruency-sequence effect) on the size of the head-fake effect was investigated. Importantly, previous fake experience did not cause the frequency-based modulation of the general size of the head-fake effect. These findings bare important implications for sports practice, especially when it comes to instructing players about the tactical use of deceptive actions.  相似文献   

Training als Verflechtungsgeschehen     

Matthias Michaeler  Thomas Alkemeyer 《Sportwissenschaft》2018,48(3):395-403

The contribution is based on praxeographic observations of volleyball team’s training processes. We suggest to reflect on the training processes as practices in which more knowledge is used than the practitioners themselves are aware of. It becomes clear in this perspective that the competencies to participate are developed by the participants mutually enabling each other to do so. Competencies are therefore to be understood as constitutively relational and cannot be ascribed to isolated individuals. Their training takes place in socio-material arrangements of successively complex exercises in which the structures characteristic of the game and the respective competencies are addressed and practiced in various, barely reflected techniques calling on dispositions generated before. In these arrangements, the players learn to deal with the urgency and possibilities of interaction. Through experience, they develop an embodied, preconscious sense for the game which enables them to adjust to complex gameplay as a team even under enormous time pressure. At the level of linguistic articulation and awareness, however, training is often rationalized by methodologically individualistic (action-theoretical) or holistic (structuralist) assumptions so that the implicit knowledge mobilized in the training practice remains largely unreflected and is instead reduced to explicit components in the respective reflective training procedures.  相似文献   

On the impact of quantum computing technology on future developments in high-performance scientific computing     

Matthias?M?llerEmail authorView author&#;s OrcID profile  Cornelis?Vuik 《Ethics and Information Technology》2017,19(4):253-269

Quantum computing technologies have become a hot topic in academia and industry receiving much attention and financial support from all sides. Building a quantum computer that can be used practically is in itself an outstanding challenge that has become the ‘new race to the moon’. Next to researchers and vendors of future computing technologies, national authorities are showing strong interest in maturing this technology due to its known potential to break many of today’s encryption techniques, which would have significant and potentially disruptive impact on our society. It is, however, quite likely that quantum computing has beneficial impact on many computational disciplines. In this article we describe our vision of future developments in scientific computing that would be enabled by the advent of software-programmable quantum computers. We thereby assume that quantum computers will form part of a hybrid accelerated computing platform like GPUs and co-processor cards do today. In particular, we address the potential of quantum algorithms to bring major breakthroughs in applied mathematics and its applications. Finally, we give several examples that demonstrate the possible impact of quantum-accelerated scientific computing on society.  相似文献