3,047 research outputs found
Brane-Localized Goldstone Fermions in Bulk Supergravity
We construct the action and transformation laws for bulk five-dimensional AdS
supergravity coupled to one or two brane-localized Goldstone fermions. The
resulting bulk-plus-brane system gives a model-independent description of
brane-localized supersymmetry breaking in the Randall-Sundrum scenario. We
explicitly reduce the action and transformation laws to spontaneously broken
four-dimensional supergravity.Comment: 22 page
Simple d=4 supergravity with a boundary
To construct rigidly or locally supersymmetric bulk-plus-boundary actions,
one needs an extension of the usual tensor calculus. Its key ingredients are
the extended (F-, D-, etc.) density formulas and the rule for the decomposition
of bulk multiplets into (co-dimension one) boundary multiplets. Working out
these ingredients for d=4 N=1 Poincar\'e supergravity, we discover the special
role played by R-symmetry (absent in the d=3 N=1 case we studied previously).
The R-symmetry has to be gauged which leads us to extend the
old-minimal set of auxiliary fields S, P, A_\mu by a compensator .
Our results include the ``F+A'' density formula, the ``Q+L+A'' formula for the
induced supersymmetry transformations (closing into the standard d=3 N=1
algebra) and demonstration that the compensator is the first component of
the extrinsic curvature multiplet. We rely on the superconformal approach which
allows us to perform, in parallel, the same analysis for new-minimal
supergravity.Comment: 26 pages. JHEP forma
Link Graph Analysis for Adult Images Classification
In order to protect an image search engine's users from undesirable results
adult images' classifier should be built. The information about links from
websites to images is employed to create such a classifier. These links are
represented as a bipartite website-image graph. Each vertex is equipped with
scores of adultness and decentness. The scores for image vertexes are
initialized with zero, those for website vertexes are initialized according to
a text-based website classifier. An iterative algorithm that propagates scores
within a website-image graph is described. The scores obtained are used to
classify images by choosing an appropriate threshold. The experiments on
Internet-scale data have shown that the algorithm under consideration increases
classification recall by 17% in comparison with a simple algorithm which
classifies an image as adult if it is connected with at least one adult site
(at the same precision level).Comment: 7 pages. Young Scientists Conference, 4th Russian Summer School in
Information Retrieva
Rigid supersymmetry with boundaries
We construct rigidly supersymmetric bulk-plus-boundary actions, both in
-space and in superspace. For each standard supersymmetric bulk action a
minimal supersymmetric bulk-plus-boundary action follows from an extended -
or -term formula. Additional separately supersymmetric boundary actions can
be systematically constructed using co-dimension one multiplets (boundary
superfields). We also discuss the orbit of boundary conditions which follow
from the Euler-Lagrange variational principle.Comment: 28 pages, JHEP clas
Vaizdo žaidimų filosofinės interpretacijos diskursai ir semantiniai tropai
The article explores one of the most remarkable and dynamic phenomena of modern technoculture – video games. It reconstructs the genesis of the philosophical discourse on video games, exposing the main difficulties arising in making the definitions. Special importance is attached to the critical comparative analysis of the major strategies for the philosophical explication of video games. With the aid of the method of comparative-historical reconstruction and a structuralist approach, the essential correlations between the essential definition of a video game and the ontological systems of Plato, the Gnostics, G. Berkeley, E. Kant, as well as post-modern philosophy was established. The research results in formulating a model-integrative definition of a video game.Straipsnyje tiriami vaizdo žaidimai – vieni išskirtiniausių ir dinamiškiausių moderniosios technokultūros fenomenų. Tekste rekonstruojama filosofinio diskurso apie vaizdo žaidimus genezė, atskleidžiamos esminės kliūtys, kylančios beieškant apibrėžimų. Ypatingas dėmesys skiriamas pagrindinėms vaizdo žaidimų filosofinio aiškinimo strategijoms ir jų kritinei lyginamajai analizei. Pasitelkę lyginamosios-istorinės rekonstrukcijos metodą ir struktūralistinę prieigą, nustatome esmines sąsajas tarp vaizdo žaidimo apibrėžimo ir ontologinių Platono, gnostikų, G. Berkeley’io, I. Kanto bei postmoderniosios filosofijos sistemų. Šio tyrimo rezultatas – suformuluotas integratyvųjį modelį atitinkantis vaizdo žaidimo apibrėžimas
Entropy-based machine learning model for diagnosis and monitoring of Parkinson's Disease in smart IoT environment
The study presents the concept of a computationally efficient machine
learning (ML) model for diagnosing and monitoring Parkinson's disease (PD) in
an Internet of Things (IoT) environment using rest-state EEG signals (rs-EEG).
We computed different types of entropy from EEG signals and found that Fuzzy
Entropy performed the best in diagnosing and monitoring PD using rs-EEG. We
also investigated different combinations of signal frequency ranges and EEG
channels to accurately diagnose PD. Finally, with a fewer number of features
(11 features), we achieved a maximum classification accuracy (ARKF) of ~99.9%.
The most prominent frequency range of EEG signals has been identified, and we
have found that high classification accuracy depends on low-frequency signal
components (0-4 Hz). Moreover, the most informative signals were mainly
received from the right hemisphere of the head (F8, P8, T8, FC6). Furthermore,
we assessed the accuracy of the diagnosis of PD using three different lengths
of EEG data (150-1000 samples). Because the computational complexity is reduced
by reducing the input data. As a result, we have achieved a maximum mean
accuracy of 99.9% for a sample length (LEEG) of 1000 (~7.8 seconds), 98.2% with
a LEEG of 800 (~6.2 seconds), and 79.3% for LEEG = 150 (~1.2 seconds). By
reducing the number of features and segment lengths, the computational cost of
classification can be reduced. Lower-performance smart ML sensors can be used
in IoT environments for enhances human resilience to PD.Comment: 19 pages, 10 figures, 2 table
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