Siegbert Schmid

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Many factors influence students’ learning – such factors include (but are not limited to) students’ learning style preferences, their interest in the material under study, and the learning environment. A student’s learning style preference refers to the way they respond to stimuli in a learning context, and to their characteristic way of acquiring and using(More)
The development of electrodes for ambient temperature sodium-ion batteries requires the study of new materials and the understanding of how crystal structure influences properties. In this study, we investigate where sodium locates in two Prussian blue analogues, Fe[Fe(CN)6]1-x·yH2O and FeCo(CN)6. The evolution of the sodium site occupancies, lattice and(More)
The high-temperature cubic form of bismuth oxide, δ-Bi2O3, is the best intermediate-temperature oxide-ionic conductor known. The most elegant way of stabilizing δ-Bi2O3 to room temperature, while preserving a large part of its conductivity, is by doping with higher valent transition metals to create wide solid-solutions fields with exceedingly rare and(More)
Li-ion batteries are widely used in portable electronic devices and are considered as promising candidates for higher-energy applications such as electric vehicles. However, many challenges, such as energy density and battery lifetimes, need to be overcome before this particular battery technology can be widely implemented in such applications. This(More)
Possibilities for 'simple' octahedral tilting in the hexagonal and tetragonal tungsten bronzes (HTB and TTB) have been examined, making use of group theory as implemented in the computer program ISOTROPY. For HTB, there is one obvious tilting pattern, leading to a structure in space group P6₃/mmc. This differs from the space group P6₃/mcm frequently quoted(More)
Computer-based multimedia learning environments have been expected to offer a powerful and effective means of improving student learning and understanding (Mayer and Moreno 2002). In recent times, there has been much research activity investigating best practices for design of multimedia instructional materials and for establishing effective e-learning(More)
Members of the AMOB2O5 (A = K, Rb, Cs, Tl; M = Nb, Ta) family of compounds can be described as modulated structures with a single superspace group and very similar modulation functions. Single-crystal X-ray diffraction data (Mo Kalpha radiation) are used to solve and refine the structure of KNbOB2O5 in these terms for the first time. The average structure(More)
Th e use of information and communications technology has an increasing infl uence on teaching activities in higher education. Information and communications technology off ers the opportunity to improve students’ learning experiences provided it is used in an educationally sound way. Material such as online pre-laboratory work can be accessed by students(More)
The structures across the Sr0.8Ti0.6-xZrxNb0.4O3, 0 ≤ x ≤ 0.6, defect perovskite series were investigated using complementary synchrotron X-ray and neutron powder diffraction data. The locations of second order compositional and temperature dependent phase transitions between the high symmetry cubic Pm3[combining macron]m phase and the lower symmetry(More)
LiMnTiO4 was prepared through solid-state syntheses employing different heating and cooling regimes. Synchrotron X-ray and neutron powder diffraction data found quenched LiMnTiO4 to form as single phase disordered spinel (space group Fd3̅m), whereas slowly cooled LiMnTiO4 underwent partial phase transition from Fd3̅m to P4332. The phase behavior of quenched(More)