On extraction of oscillation parameters

We discuss methods to extract neutrino oscillation parameters based on the directly observable quantities, without reconstruction of neutrino energy. The distributions of muon energies and production angles are compared to Monte Carlo predictions made for a set of different neutrino oscillation parameters. The method is applied to T2K neutrino beam and tested for a set of MC data samples in order to evaluate the statistical error.Comment: 5 pages, 1 figure. To be published in proceedings of the workshop 'European Strategy for Future Neutrino Physics' (CERN Yellow Report

Electroweak Single Pion Production and Form Factors of the \Delta(1232) Resonance

We extend and review our analysis of the nucleon \to \Delta(1232) transition electroweak form factors from Ref. [1]. New fit of the \Delta(1232) vector form factors to electron-proton scattering F_2 structure function is introduced as well, leading to results different from the popular parametrization of Ref. [2]. A clear model dependence of the extracted parameters emerges. Fit to neutrino scattering data is performed in all available isospin channels. The resulting axial mass is M_{A\Delta}=0.85^{+0.09}_{-0.08} (GeV) and $C_5^A(0) = 1.10^{+0.15}_{-0.14}. The latter value is in accordance with Goldberger-Treiman relation as long as the deuteron effects are included.Comment: 10 pages, 5 figures. Proceedings of the CETUP*2014 workshop "Neutrino Interactions", corrected versio

Stimulated Brillouin scattering effects and suppression techniques in high power fiber amplifiers

This dissertation develops a model for numerical analysis of stimulated Brillouin scattering (SBS) effects and the development of suppression techniques for the realization of increased output power levels for high power ytterbium-doped dual clad fiber amplifiers. The overall objective of this effort is to develop and validate a predictive model to assist in the determination of the most effective techniques for increasing SBS thresholds within ytterbium-doped fiber amplifiers in order to realize increased power output. The goal is to demonstrate an increase in SBS threshold that would increase the output power potential in ytterbium-doped fiber amplifiers by at least an order of magnitude. The approach determines the effect of changing the acoustic properties of fiber cores on the Brillouin frequencies and the effects of various signal modulation schemes on active ytterbium-doped fiber amplifiers. In addition, temperature effects and temperature differentials within the fibers are predicted and measured, both with passive and active fibers. Brillouin center frequency responses of various germanium dopant concentrations within the cores, as well as the effects of fiber segment combinations are measured in the lab. The effects of various phase modulation schemes of the signal are predicted and measured for passive fibers. Results from these measurements are used to validate and adjust the model accordingly. Finally, the manufacturability of relevant characteristics required to achieve such SBS suppression is evaluated, identifying constraints and limitations for utilization of low cost fabrication techniques. The final model, validated and adjusted with empirical results, supports the suppression of SBS in standard ytterbium-doped fiber amplifiers by over a decade

Foolproof quick-release locking pin

Locking pin can be withdrawn only when stress on the joint is negligible. Pin consists of a forward-pointing sleeve, a spring-loaded sliding handle, and a sliding plunger. Plunger movement controls installation and withdrawal of pin

Recepcja imion zakonnych w wypowiedziach internautów

This article is part of the study of Polish religious names. The purpose is to analyse the reception of religious names by Internet users (the subject of the description was made by their comments on various Internet forums). The analysis of the methods of describing and evaluating religious names, unusual for baptismal nomenclature and names marked as ordinary Internet users, was carried out. The article uses both onomastic (especially religious onomastics) and sociolinguistic works.Niniejszy artykuł wpisuje się w nurt badań nad polskim imiennictwem zakonnym. Celem analiz uczyniono recepcję imion zakonnych przez środowisko internautów (przedmiotem opisu były wypowiedzi internautów umieszczone na różnych forach internetowych). Dokonano analizy sposobów opisu i wartościowania imion zakonnych, nietypowych dla nazewnictwa chrzestnego oraz imion zwanych przez internautów zwykłymi. W artykule wykorzystano zarówno prace onomastyczne (zwłaszcza z onomastyki religijnej), jak i socjolingwistyczne

Resin hemoperfusion in dogs intoxicated with ethchlorvynol (Placidyl®)

Resin hemoperfusion in dogs intoxicated with ethchlorvynol (Placidyl®). Kinetic parameters were studied to determine the effectiveness of hemoperfusion in removing ethchlorvynol from the plasma and red blood cells (RBC) of intoxicated dogs. Perfusion columns contained polystyrene/divinyl benzene resin (XAD-4 Amberlite(®)). Column clearances of ethchlorvynol averaged 96.5 ± 0.4% of the plasma flow rate (mean ±SEM, 9 dogs). Plasma ethchlorvynol t1/2's during preperfusion periods averaged 94.1hr. During hemoperfusion, t1/2's averaged 3.8hr, or 90.3hr shorter than at the endogenous rate of detoxication. There was no significant difference between preperfusion and postperfusion half lives. An estimate based on plasma column clearance suggests that 1.5 ± 0.1g ethchlorvynol, or 19.0 ± 2.8% of the dose, was removed by hemoperfusion. The amount eluted from the resin was 2.9 ± 0.3g (37.2 ± 5.8% of the dose), or about twice the amount apparent from plasma clearance alone. Further, the volume of distribution of ethchlorvynol was 2.3 ± 0.2 liters/kg, suggesting significant distribution to intracellular and extravascular compartments. The results show that resin hemoperfusion removes a large fraction of ethchlorvynol from intoxicated dogs, and greatly adds to endogenous mechanisms for elimination. Ethchlorvynol was removed from RBC directly, and ultimately from extravascular sites as well.Hémoperfusion sur résine chez des chiens intoxiqués par l'éthchlorvynol (Placidyl®). Afin de déterminer l'efficacité de l'hémoperfusion dans la soustraction d'éthchlorvynol du plasma et des hématies de chiens intoxiqués, les paramètres cinétiques ont été mesurés. Les colonnes de perfusion contenaient une résine polystyrène/divinyl benzène (XAD-4 Amberlite®). La clearance de l'éthchlorvynol par les colonnes était en moyenne de 96,5 ± 0,4% du débit plasmatique (moyenne ±SEM, 9 chiens). La plasmatique de l'éthchlorvynol t½'s pendant la période préalable à la perfusion était de 94,1 heures. Pendant l'hémoperfusion, t½'s était en moyenne de 3,8 heures, soit 90,3 heures de moins qu'au cours de la détoxication spontanée. Il n'a pas été observé de différence entre les demi vies avant et après perfusion. Une estimation fondée sur la clearance des colonnes suggère que 1,5 ± 0,1g d'éthchlorvynol, soit 19,0 ± 2,8% de la dose a été soustrait par l'hémoperfusion. La quantité éluée de la résine a été de 2,9 ± 0,3g (37,2 ± 5,8% de la dose), soit le double de la quantité évaluée à partir de la clearance du plasma. De plus, le volume de distribution de l'éthchlorvynol était de 2,3 ± 0,2 litres/kg, ce qui suggère une distribution importante dans les compartiments intracellulaire et extravasculaire. Les résultats montrent que l'hémoperfusion sur résine soustrait une fraction importante de l'éthchlorvynol chez des chiens intoxiqués et ajoute une élimination importante aux mécanismes endogènes. L'ethchlorvynol a été soustrait des hématies directement et finalement des sites extravasculaires aussi

Dispersive Fourier Transformation for Versatile Microwave Photonics Applications

Abstract: Dispersive Fourier transformation (DFT) maps the broadband spectrum of an ultrashort optical pulse into a time stretched waveform with its intensity profile mirroring the spectrum using chromatic dispersion. Owing to its capability of continuous pulse-by-pulse spectroscopic measurement and manipulation, DFT has become an emerging technique for ultrafast signal generation and processing, and high-throughput real-time measurements, where the speed of traditional optical instruments falls short. In this paper, the principle and implementation methods of DFT are first introduced and the recent development in employing DFT technique for widespread microwave photonics applications are presented, with emphasis on real-time spectroscopy, microwave arbitrary waveform generation, and microwave spectrum sensing. Finally, possible future research directions for DFT-based microwave photonics techniques are discussed as well