10,679 research outputs found
Surface-induced magnetism in C-doped SnO
The magnetism of C-doped SnO (001) surfaces is studied using
first-principles calculations. It is found that carbon does not induce
magnetism in bulk SnO when located at the oxygen site, but shows a large
magnetic moment at the SnO (001) surface. The magnetic moment is mainly
contributed by the carbon atoms due to empty minority spins of orbitals and
is localized at the surface and subsurface atoms. No magnetism is observed when
the carbon atom is located at the subsurface oxygen sites. The origin of
magnetism is discussed in the context of surface bonding.Comment: 3 pages, 3 figure
Finding NHIM: Identifying High Dimensional Phase Space Structures in Reaction Dynamics using Lagrangian Descriptors
Phase space structures such as dividing surfaces, normally hyperbolic
invariant manifolds, their stable and unstable manifolds have been an integral
part of computing quantitative results such as transition fraction, stability
erosion in multi-stable mechanical systems, and reaction rates in chemical
reaction dynamics. Thus, methods that can reveal their geometry in high
dimensional phase space (4 or more dimensions) need to be benchmarked by
comparing with known results. In this study, we assess the capability of one
such method called Lagrangian descriptor for revealing the types of high
dimensional phase space structures associated with index-1 saddle in
Hamiltonian systems. The Lagrangian descriptor based approach is applied to two
and three degree-of-freedom quadratic Hamiltonian systems where the high
dimensional phase space structures are known, that is as closed-form analytical
expressions. This leads to a direct comparison of features in the Lagrangian
descriptor plots and the phase space structures' intersection with an
isoenergetic two-dimensional surface and hence provides a validation of the
approach.Comment: 39 pages, 7 figures, Submitted to Communications in Nonlinear Science
and Numerical Simulatio
Bringing Optical Communications to the General Public: an Innovative Bachelor Thesis
The United Nations “International year of light 2015” strives to highlight the importance of optical technologies in our everyday lives. Fibre optic communication is one such technology: the growth of internet and its associated services are enabled by the vast transmission bandwidth provided by optical networks. However, the general public is not well aware of the optical and electronic fundamentals of the underlying transmission systems. Here we present the development of a bachelor thesis in Telecommunication Engineering in which a small-scale fibre-optic link is built and the electronics required to transmit music over this link are implemented. The resulting system demonstrates, in a very intuitive way, how information is transmitted over an optical fibre.Universidad de Málaga. Campus de Excelencia Internacional AndalucĂa Tech
Returns to education and to experience within the EU: are there differences between wage earners and the self-employed?
This paper investigates the returns to education and to experience within the 15 pre-enlargement EU countries, distinguishing between wage earners and the self-employed. These returns are estimated by using a comparable data set coming from the European Community Household Panel during the period 1994-2000. To correct for the ability bias and recover the education coefficients, an Efficient Generalized Instrumental Variable technique is applied. Although the results differ across countries, two common features can be observed. First, the earnings-experience profiles indicate certain traits of competitiveness in the labor markets and, secondly, the returns to education show that signaling plays a relevant role in the earnings of workers.Returns to education, wage earners, self-employed, panel data, European Union
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