356 research outputs found
From Graphs to Keyed Quantum Hash Functions
We present two new constructions of quantum hash functions: the first based
on expander graphs and the second based on extractor functions and estimate the
amount of randomness that is needed to construct them. We also propose a keyed
quantum hash function based on extractor function that can be used in quantum
message authentication codes and assess its security in a limited attacker
model
Rapid mental computation system as a tool for algorithmic thinking of elementary school students development
In this paper, we describe the possibilities of using a rapid mental
computation system in elementary education. The system consists of a number of
readily memorized operations that allow one to perform arithmetic computations
very quickly. These operations are actually simple algorithms which can develop
or improve the algorithmic thinking of pupils. Using a rapid mental computation
system allows forming the basis for the study of computer science in secondary
school
Combining Variational Autoencoders and Physical Bias for Improved Microscopy Data Analysis
Electron and scanning probe microscopy produce vast amounts of data in the
form of images or hyperspectral data, such as EELS or 4D STEM, that contain
information on a wide range of structural, physical, and chemical properties of
materials. To extract valuable insights from these data, it is crucial to
identify physically separate regions in the data, such as phases, ferroic
variants, and boundaries between them. In order to derive an easily
interpretable feature analysis, combining with well-defined boundaries in a
principled and unsupervised manner, here we present a physics augmented machine
learning method which combines the capability of Variational Autoencoders to
disentangle factors of variability within the data and the physics driven loss
function that seeks to minimize the total length of the discontinuities in
images corresponding to latent representations. Our method is applied to
various materials, including NiO-LSMO, BiFeO3, and graphene. The results
demonstrate the effectiveness of our approach in extracting meaningful
information from large volumes of imaging data. The fully notebook containing
implementation of the code and analysis workflow is available at
https://github.com/arpanbiswas52/PaperNotebooksComment: 20 pages, 7 figures in main text, 4 figures in Supp Ma
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