Search results for "SOFC"
showing 10 items of 660 documents
$PT$-symmetric graphene under a magnetic field
2016
We propose a $PT$-symmetrically deformed version of the graphene tight-binding model under a magnetic field. We analyze the structure of the spectra and the eigenvectors of the Hamiltonians around the $K$ and $K'$ points, both in the $PT$-symmetric and $PT$-broken regions. In particular we show that the presence of the deformation parameter $V$ produces several interesting consequences, including the asymmetry of the zero-energy states of the Hamiltonians and the breakdown of the completeness of the eigenvector sets. We also discuss the biorthogonality of the eigenvectors, which {turns out to be} different in the $PT$-symmetric and $PT$-broken regions.
Approximate Taylor methods for ODEs
2017
Abstract A new method for the numerical solution of ODEs is presented. This approach is based on an approximate formulation of the Taylor methods that has a much easier implementation than the original Taylor methods, since only the functions in the ODEs, and not their derivatives, are needed, just as in classical Runge–Kutta schemes. Compared to Runge–Kutta methods, the number of function evaluations to achieve a given order is higher, however with the present procedure it is much easier to produce arbitrary high-order schemes, which may be important in some applications. In many cases the new approach leads to an asymptotically lower computational cost when compared to the Taylor expansio…
El futuro del derecho como lucha contra la idolatría tecnológica
2019
The main challenge that Law will have to face in the near future is the defense of human being against the uncontrolled power of technology in different spheres: ecology versus the becoming of a new geological age: the Anthropocene; the finances, versus speculation and taxes fraud; biolaw, versus the transhumanist challenge; the rights to privacy and no manipulation versus GAF( Google, Amazon, Facebook). El reto principal al que debera hacer frente el derecho en el futuro es la defensa del ser humano frente al poder incontrolado de la tecnologia en diferentes campos: la ecologia, frente a la aparicion de una nueva era geologica: el Antropoceno; las finanzas, frente a la especulacion y el fr…
Streaming era digital media piracy : an integration of three theoretical perspectives
2018
Consumer digital piracy in media contexts is one of the most publicized adverse developments brought on by the Internet and digitization of data. Since the turn of the millennium, it has irrevocably changed the business environment for the creative industries. The sharp decrease of recorded music sales, especially in the physical album format, is perhaps the best example of the negative effects digital piracy. However, the growth of legal services in digital music and video is balancing this trend, as consumers have found that piracy is no longer the obvious solution to acquiring music and video content. This also calls for new approaches to piracy research. We sought them by integrating th…
Linear Feature Extraction for Ranking
2018
We address the feature extraction problem for document ranking in information retrieval. We then propose LifeRank, a Linear feature extraction algorithm for Ranking. In LifeRank, we regard each document collection for ranking as a matrix, referred to as the original matrix. We try to optimize a transformation matrix, so that a new matrix (dataset) can be generated as the product of the original matrix and a transformation matrix. The transformation matrix projects high-dimensional document vectors into lower dimensions. Theoretically, there could be very large transformation matrices, each leading to a new generated matrix. In LifeRank, we produce a transformation matrix so that the generat…
The 21st Century Reforms (Re)Shaping the Education Policy of Inclusive and Special Education in Finland
2021
In recent decades, an essential global aim of the reforms of special education has been the promotion of inclusive education. This article discusses the implementation of reforms with a focus on tiered support systems in the context of Finnish comprehensive school education. Based on earlier literature, legislation, and administrative documents, we provide a background for Finnish education policy and special education reforms. The focus of this article is on the description of parallel reforms targeting the re-structuring of the systems around support for students and funding of education in the 2010s. We discuss the processes leading to these reforms and the reforms themselves. In additio…
Privacy Versus Security in the Internet Era
2015
Abstract There are a lots of conflict going on in the world right now. One of this conflict we are put into discussion here, is the battle for supremacy in the internet, the battle between privacy and security. We are changing fundamentally the way we are doing things till the Internet era arrive. Every data that we use online became a product. There is no more private information, everything became public with or without the population will. There are also a lot of discussion about who have a greater power on the Internet, government, companies, hackers, criminals, terrorists, or others. Unfortunately the neuter population is catch in the middle of this battle.
A century of trends in adult human height
2016
Article
Structural analysis, phase stability and electrochemical characterization of Nb doped BaCe0.9Y0.1O3−x electrolyte for IT-SOFCs
2012
Abstract To improve the chemical stability of high temperature proton conductors based on barium cerate, electrolyte powders doped with different amounts of niobium were synthesized by the citrate–nitrate auto-combustion method. Pure single phases of BaCe 0.9− x Nb x Y 0.1 O 3− x (BCYN, 0.03 ≤ x ≤ 0.12) were obtained by thermal treatment at 1000 °C. Sintering at 1450 °C for 10 h produced dense pellets. X-ray absorption spectroscopy allowed to define the dopant ion insertion site and the co-dopant valency. Treatments in pure CO 2 atmosphere at 700 °C for 3 h and subsequent XRD analysis were carried out to probe the chemical stability of the produced electrolytes. The influence of the prese…
Legal-Economic Ownership and Generational Transfer in Family Business: Facets of Owner's Responsibility
2010
In the following paper a conceptual framework of the owner’s responsibility is created in order to study the transgenerational legal-economic ownership in the family business. Responsible ownership involves a sense of accountability and entrepreneurship to some extent. However, legal and social responsibilities naturally supplement each other in the family firm. Owners by means of personal relationships and financial guarantees are responsible for carrying out daily business operations and maintaining a balance with the stakeholders. The certain constituents of the estate planning are evaluated through the lens of responsibility. As a final step, the following study provides a synthesis mat…