Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Lunar calendars. --- Islamic calendar. --- Calendar. --- Computus --- Astronomy --- Chronology, Historical --- Chronology --- Calendar, Islamic --- Muslim calendar --- Calendar --- Moon phases calendars --- Calendars

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

topological constraint theory (TCT) --- topological phases --- fragility index --- modulated-DSC --- molecular dynamics --- Raman scattering --- chalcogenides --- statistical mechanics

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

When looking at the process of extending the practical phases within teachers’ training, the question of its impact on students’ professionalisation becomes increasingly important. The given study distances itself from normative positions promoting an unquestioned positive effect of these practical experiences. Instead, the focus will be on the question if or to what extent practical experiences lead to a process of professionalization for future teachers. In order to tackle this question, narrative interviews have been conducted with students in teachers training who have signed in for a so-called “Studien-Praxis-Projekt”, wherein these students cooperate with teachers working on a specific problem regarding school and lesson planning development. The interviews, which have been analysed using the documentary method, provide new insights into two different areas, the student’s habitus – as a transitional phase between the pupil’s and the teacher’s habitus – and specific developmental tasks of students in teachers training. Furthermore, the results illustrate a correlation between a specific student habitus on the one hand and the way students deal with developmental tasks on the other hand. Not only can we draw conclusions about the different types of professionalisation from these data, but also it is possible to deduce the potential of professionalization for these different types. In conclusion, one can define subject-based competence as the centre of, reflection as the means and a so-called ‘in between’ as the place of students’ professionalisation. Vor dem Hintergrund der Ausweitung schulischer Praxisphasen im Lehramtsstudium erlangt die Frage nach deren professionalisierungsförderlichem Charakter immer mehr Bedeutsamkeit. Die vorliegende Arbeit nimmt Abstand von normativen Positionen zur generell positiven Wirkung von Praxiserfahrungen und fragt, inwiefern sich Studierende in Schulpraxisprojekten professionalisieren. Dazu wurden narrativ-fundierte Interviews mit Lehramtsstudierenden geführt, die sich für ein sog. „Studien-Praxis-Projekt“ entschieden haben, in welchem sie mit Lehrkräften an gemeinsamen Projekten der Schul- und Unterrichtsentwicklung arbeiteten. Die Interviews wurden mithilfe der Dokumentarischen Methode ausgewertet und liefern einerseits Erkenntnisse zum Studierendenhabitus als Transitionsphase zwischen dem Schüler*innen- und dem Lehrer*innenhabitus und andererseits zu studentischen Entwicklungsaufgaben in Schulpraxisphasen. Hierbei zeigte sich in Form einer Professionalisierungstypologie ein Zusammenhang zwischen den rekonstruierten Studierendenhabitūs und den Modi der Anforderungsbearbeitung von Entwicklungsaufgaben. Diese liefert nicht nur Antworten auf die Frage nach Typen studentischer Professionalisierung, sondern auch nach deren Professionalisierungspotentialen. Im Anschluss daran kann Fachlichkeit als Gegenstand, Reflexion als Medium und ein „Dazwischen“ als Ort studentischer Professionalisierung verstanden werden.

Teacher training --- Professionsforschung, studentische Professionalisierung in Praxisphasen, Studierendenhabitus, Entwicklungsaufgaben, Schul- und Unterrichtsentwicklung, Dokumentarische Methode, professionalism, professionalisation of students in practical phases, students’ habitus, developmental tasks, school and lesson planning development, documentary method

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The Special Edition 'Compounds with Polar Metallic Bonding' is a collection of eight original research reports presenting a broad variety of chemical systems, analytical methods, preparative pathways and theoretical descriptions of bonding situations, with the common aim of understanding the complex interplay of conduction electrons in intermetallic compounds that possess different types of dipoles. Coulombic dipoles introduced by electronegativity differences, electric or magnetic dipoles, polarity induced by symmetry reduction-all the possible facets of the term 'polarity'-can be observed in polar intermetallic phases and have their own and, in most cases, unique consequences on the physical and chemical behaviour. Elucidation of the structure-property relationships in compounds with polar metallic bonding is a modern and growing scientific field which combines solid state physics, preparative chemistry, metallurgy, modern analytic methods, crystallography, theoretical calculations of the electronic state and many more disciplines.

bonding analyses --- coloring problem --- n/a --- X-ray diffraction --- magnetism --- band structure --- group-subgroup --- alkaline-earth --- Zintl --- nitridometalate --- structure optimizations --- electronic structure --- polar intermetallics --- polar intermetallic --- intermetallic compounds --- XPS --- Zintl compounds --- stannides --- total energy --- COHP method --- symmetry reduction --- chemical bond --- plumbides --- ternary Laves phases --- powder diffraction --- intermetallics --- magnetic properties --- Ca14AlSb11 --- thermoelectric --- crystal structure --- liquid ammonia

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The Special Issue of Separations, “Development of Alternative Green Sample Preparation Techniques”, provides an overview on recent trends in green sample preparation. This Special Issue of Separations collates 11 impressive contributions that describe the state-of-the-art in the development of green extraction technologies, from green materials for microextraction to the development of new sampling devices geometries for enhanced extraction efficiency and analysis throughput.

Gac --- seeds --- Momordica cochinchinensis --- extraction --- trypsin inhibitors --- optimisation --- freeze drying --- response surface methodology --- metal-organic frameworks --- analytical chemistry --- sorbent materials --- stationary phases --- sensors --- sample preparation --- green considerations --- biosorbents --- microextraction --- organic compounds --- green extraction phases --- TF-SPME --- thermal desorption --- environmental analysis --- flavor and fragrance --- onsite sampling --- in vivo analysis --- ultra-trace analysis --- bar adsorptive microextraction --- floating sampling technology --- high-performance liquid chromatography --- polar UV filters --- real matrices --- foodomics --- Brazilian yeast --- craft beer --- sensomics --- automation --- sample handling --- chemical warfare agent --- SPE --- LLE --- non-invasive sampling --- wearable devices --- extractive patches --- skin sampling --- passive sampling --- green sampling technologies --- microextraction techniques --- body fluids --- bioactive compounds --- clinical and forensic analysis --- metal extraction --- liquid–liquid extraction --- solid-phase extraction --- solid-phase microextraction --- green extraction methods --- SPME --- green chemistry --- air sampling --- complex matrices --- mass spectrometry --- n/a --- liquid-liquid extraction