60,132 research outputs found
The Game as an Instrument of Honors Students’ Personal Development in the SibFU Honors College
Honors colleges often serve as laboratories for pedagogical innovation, where new learning strategies and technologies are created both in the sphere of honors education and in the broader context of universities. This study describes a method of “organizational activity games” (OAG) introduced in the honors college of Siberian Federal University (SibFU) in Russia. The author explores the advantages of the game method for reaching the goal of honors students’ personal development. The theory and history of the game, invented in the Russian school of methodology by G. P. Shchedrovitskii, is explored in its relation to the theoretical principles of honors education. This research shows that the philosophy of games designed to create an intellectual elite of independently thinking citizens can be effectively employed in honors education. The study reveals how the objectives of the game—to develop and study new methods of teaching and learning in universities—contribute to the inventive pedagogies of honors colleges. The author provides insight into the various stages of the inaugural organizational activity game conducted at the SibFU Honors College. Results prove that the game may be regarded as a new method of honors teaching and learning applicable to honors programs in institutions worldwide
Mathematical modeling of thermal stabilization of vertical wells on high performance computing systems
Temperature stabilization of oil and gas wells is used to ensure stability
and prevent deformation of a subgrade estuary zone. In this work, we consider
the numerical simulation of thermal stabilization using vertical seasonal
freezing columns.
A mathematical model of such problems is described by a time-dependent
temperature equation with phase transitions from water to ice. The resulting
equation is a standard nonlinear parabolic equation.
Numerical implementation is based on the finite element method using the
package Fenics. After standard purely implicit approximation in time and simple
linearization, we obtain a system of linear algebraic equations. Because the
size of freezing columns are substantially less than the size of the modeled
area, we obtain mesh refinement near columns. Due to this, we get a large
system of equations which are solved using high performance computing systems.Comment: 9 pages, 5 figure
Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
We discuss neutral and charged complexes (biexciton and trion) formed by
indirect excitons in layered quasi-two-dimensional semiconductor
heterostructures. Indirect excitons -- long-lived neutral Coulomb-bound pairs
of electrons and holes of different layers -- have been known for semiconductor
coupled quantum wells and are recently reported for van der Waals
heterostructures such as bilayer graphene and transition metal dichalcogenides.
Using the configuration space approach, we derive the analytical expressions
for the trion and biexciton binding energies as functions of the interlayer
distance. The method captures essential kinematics of complex formation to
reveal significant binding energies, up to a few tens of meV for typical
interlayer distances ~3-5 A, with the trion binding energy always being greater
than that of the biexciton. Our results can contribute to the understanding of
more complex many-body phenomena such as exciton Bose-Einstein condensation and
Wigner-like electron-hole crystallization in layered semiconductor
heterostructures.Comment: 10 pages, 4 figures, 105 references. arXiv admin note: text overlap
with arXiv:1605.0234
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