206 research outputs found
Localization of UAVs from Camera Image
Tématem této práce je využití neuronových sítí pro lokalizaci kvadrokoptér. Řešení práce spočívá v důkladném prostudování látky a návrhu algoritmu, který bude schopen správně detekovat a lokalizovat UAV z kamerového výstupu pomocí neuronových sítí. Práce se zabývá rozborem neuronových sítí, vhodným výběrem sítě pro řešení problematiky, jejím návrhem a vytvořením funkčního algoritmu schopného detekovat a označit objekty v reálném čase. Kromě přípravy algoritmu pro živý vstup je jeho funkcionalita ozkoušena na testovací sadě obrazů pro získání ucelené informace o přesnosti. Výsledky testů jsou následně rozebrány a z nich jsou vyvozeny možné návrhy na zlepšení.The goal of this work is to test the possibility of using neural networks to localize UAVs. Solution for this problem lies in an extensive research of given subject and in the development of algorithm, which will be able to detect and localize flying quadrocopters from video stream. This work will provide a thorough analysis of neural networks, proper network design and the development of functional algorithm, capable of live stream object marking. Apart from preparing the algorithm for live feed input, the functionality of this program will be tested on a set of pictures to properly analyze the precision. Results of these tests will be discussed in final suggestion for future upgrades
3-3-1 Models With Unique Lepton Generations and Analysis of Higgs Decays
We examined several 3-3-1 Models containing three unique lepton generations -- each generation has unique quantum numbers and uses the other generations to fully cancel anomalies. These models have been previously discussed in a paper published by Marc Sher and David Anderson [2]. Using new data from the LHC [5], we revisited the Higgs decays presented in these models, and analyzed their viability. Despite the theoretical possibility for extending the Standard Model, none of the models proposed by Anderson and Sher in 2005 have survived experimental verification. We will provide background information on the Standard Model, introduce some of the possible extensions of it, and then show how these extensions failed in comparison to experimental data
Design and Characterization of a Neutron Calibration Facility for the Study of sub-keV Nuclear Recoils
As part of an experimental effort to demonstrate sensitivity in a large-mass
detector to the ultra-low energy recoils expected from coherent
neutrino-nucleus elastic scattering, we have designed and built a highly
monochromatic 24 keV neutron beam at the Kansas State University Triga Mark-II
reactor. The beam characteristics were chosen so as to mimic the soft recoil
energies expected from reactor antineutrinos in a variety of targets, allowing
to understand the response of dedicated detector technologies in this yet
unexplored sub-keV recoil range. A full characterization of the beam properties
(intensity, monochromaticity, contaminations, beam profile) is presented,
together with first tests of the calibration setup using proton recoils in
organic scintillator.Comment: submitted to Nucl. Instr. Meth.
Charges, Monopoles and Duality Relations
A charge-monopole theory is derived from simple and self-evident postulates.
Charges and monopoles take an analogous theoretical structure. It is proved
that charges interact with free waves emitted from monopoles but not with the
corresponding velocity fields. Analogous relations hold for monopole equations
of motion. The system's equations of motion can be derived from a regular
Lagrangian function.Comment: 17 pages + 3 figures
Q-balls in Underground Experiments
In this paper we present some features of Q-balls and we discuss their
interactions with matter, and their energy losses in the Earth, for a large
range of velocities. These calculations are used to compute the fractional
geometrical acceptance of the MACRO detector. Furthermore a systematic analysis
of the energy losses of Q-balls in three types of detectors is investigated.
More specifically we have computed the light yield in liquid scintillators, the
ionization in streamer tubes and the Restricted Energy Loss in the CR39 nuclear
track detectors.Comment: 7 pages, 4 PS figures included with epsfig, uses espcrc2.sty Talk
given at the Sixth Topical Seminar on Neutrino and Astroparticle Physics, San
Miniato, Italy, 17-21 May 199
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Computational Knowledge Integration in Biopharmaceutical Research
An initiative to increase biopharmaceutical research productivity by capturing, sharing and computationally integrating proprietary scientific discoveries with public knowledge is described. This initiative involves both organisational process change and multiple interoperating software systems. The software components rely on mutually supporting integration techniques. These include a richly structured ontology, statistical analysis of experimental data against stored conclusions, natural language processing of public literature, secure document repositories with lightweight metadata, web services integration, enterprise web portals and relational databases. This approach has already begun to increase scientific productivity in our enterprise by creating an organisational memory (OM) of internal research findings, accessible on the web. Through bringing together these components it has also been possible to construct a very large and expanding repository of biological pathway information linked to this repository of findings which is extremely useful in analysis of DNA microarray data. This repository, in turn, enables our research paradigm to be shifted towards more comprehensive systems-based understandings of drug action
The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
Observations of cosmic-ray electrons and positrons have been made with a new
balloon-borne detector, HEAT (the "High-Energy Antimatter Telescope"), first
flown in 1994 May from Fort Sumner, NM. We describe the instrumental approach
and the data analysis procedures, and we present results from this flight. The
measurement has provided a new determination of the individual energy spectra
of electrons and positrons from 5 GeV to about 50 GeV, and of the combined
"all-electron" intensity (e+ + e-) up to about 100 GeV. The single power-law
spectral indices for electrons and positrons are alpha = 3.09 +/- 0.08 and 3.3
+/- 0.2, respectively. We find that a contribution from primary sources to the
positron intensity in this energy region, if it exists, must be quite small.Comment: latex2e file, 30 pages, 15 figures, aas2pp4.sty and epsf.tex needed.
To appear in May 10, 1998 issue of Ap.
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Experimental proposal to the National Accelerator Laboratory for a search for multigamma
The Search for Stable, Massive, Elementary Particles
In this paper we review the experimental and observational searches for
stable, massive, elementary particles other than the electron and proton. The
particles may be neutral, may have unit charge or may have fractional charge.
They may interact through the strong, electromagnetic, weak or gravitational
forces or through some unknown force. The purpose of this review is to provide
a guide for future searches - what is known, what is not known, and what appear
to be the most fruitful areas for new searches. A variety of experimental and
observational methods such as accelerator experiments, cosmic ray studies,
searches for exotic particles in bulk matter and searches using astrophysical
observations is included in this review.Comment: 34 pages, 8 eps figure
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