2,878 research outputs found
Analysis of Small Muscle Movement Effects on EEG Signals
In this thesis, the artefactual effects of the small muscle movements were investigated. Upper frequency bands (30 Hz) of the EEG signal were extracted in order to investigate the artefactual effects of the small muscle movements. When the contamination level is high, the detection of the small muscle artifact can be made with the 92.2% accuracy. If these artifacts are really small such as a single finger movement, the detection accuracy decreases to 64%. But, the detection accuracy increases to 72% after removing the eye blink artifacts. The results of the classification support our hypothesis about the artefactual effects of the small muscle movements
Project PROMETHEUS: Design and Construction of a Radio Frequency Quadrupole at TAEK
The PROMETHEUS Project is ongoing for the design and development of a 4-vane
radio frequency quadrupole (RFQ) together with its H+ ion source, a low energy
beam transport (LEBT) line and diagnostics section. The main goal of the
project is to achieve the acceleration of the low energy ions up to 1.5 MeV by
an RFQ (352 MHz) shorter than 2 meter. A plasma ion source is being developed
to produce a 20 keV, 1 mA H+ beam. Simulation results for ion source,
transmission and beam dynamics are presented together with analytical studies
performed with newly developed RFQ design code DEMIRCI. Simulation results
shows that a beam transmission 99% could be achieved at 1.7 m downstream
reaching an energy of 1.5 MeV. As the first phase an Aluminum RFQ prototype,
the so-called cold model, will be built for low power RF characterization. In
this contribution the status of the project, design considerations, simulation
results, the various diagnostics techniques and RFQ manufacturing issues are
discussed.Comment: 4 pages, 8 figures, Proceedings of the 2nd International Beam
Instrumentation Conference 2013 (IBIC'13), 16-19 Sep 2013, WEPC02, p. 65
On Some Hadamard-Type Inequalıtıes for (r,m) -Convex Functıons
In this paper, we define a new class of convex functions which is called (r,m) - convex functions. We also prove some Hadamard\u27s type inequalities based on this new definition
Stent thrombosis in patients with drug-eluting stents and bioresorbable vascular scaffolds
The percutaneous coronary intervention has undergone rapid evolution over the last 40 years and has become one of the most widely performed medical procedures. The introduction of intracoronary stents improved the safety and efficacy of percutaneous coronary intervention. But with the advent of stenting, a new potentially fatal enemy emerged: stent thrombosis. Ever since, adjunct pharmacological therapy, stent technique and technology have been adjusted to reduce the risk of stent thrombosis. The aim of the present article is to provide an overview of past, present and future aspects of percutaneous intervention in relation to stent thrombosis
A Study of Inclusive Double-Pomeron-Exchange in p pbar -> p X pbar at root s = 630 GeV
We report measurements of the inclusive reaction, p pbar -> p X pbar, in
events where either or both the beam-like final-state baryons were detected in
Roman-pot spectrometers and the central system was detected in the UA2
calorimeter. A Double-Pomeron-Exchange (DPE) analysis of these data and single
diffractive data from the same experiment demonstrates that, for central masses
of a few GeV, the extracted Pomeron-Pomeron total cross section exhibits an
enhancement which exceeds factorization expectations by an order-of-magnitude.
This may be a signature for glueball production. The enhancement is shown to be
independent of uncertainties connected with possible non-universality of the
Pomeron flux factor. Based on our analysis, we present DPE cross section
predictions, for unit (1 mb) Pomeron-Pomeron total cross section, at the
Tevatron, LHC and the 920 GeV fixed-target experiment, HERA-B.Comment: 52 pages, 27 Encapsulated Postscript figures, 3 Tables, LaTex,
Revised version as it will appear in European Physics Journal
Cross Section Measurements of Hard Diffraction at the SPS-Collider
The UA8 experiment previously reported the observation of jets in diffractive
events containing leading protons (``hard diffraction''), which was interpreted
as evidence for the partonic structure of an exchanged Reggeon, believed to be
the Pomeron . In the present Letter, we report the final UA8 hard-diffractive
(jet) cross section results and their interpretation. After corrections, the
fraction of single diffractive events with mass from 118 to 189 GeV that have
two scattered partons, each with Et_jet > 8 GeV, is in the range 0.002 to 0.003
(depending on x_p). We determine the product, fK, of the fraction by which the
Pomeron's momentum sum rule is violated and the normalization constant of the
Pomeron-Flux-Factor of the proton. For a pure gluonic- or a pure qqbar-Pomeron
, respectively: fK = 0.30 +- 0.05 +- 0.09) and (0.56 +- 0.09 +- 0.17) GeV^-2.Comment: 20 pages, 5 Encapsulated Postscript figures, LaTex, Final Version,
Physics Letters B (in Pess 1998
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