cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Compact [C II] emitters around a C IV absorption complex at redshift 5.7
Creators: name: Kashino, Daichi
name: Lilly, Simon J.
name: Simcoe, Robert A.
name: Bordoloi, Rongmon
name: Mackenzie, Ruari
name: Matthee, Jorryt
name: Eilers, Anna-Christina
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The physical conditions of the circumgalactic medium are probed by intervening absorption-line systems in the spectrum of background quasi-stellar objects out to the epoch of cosmic reionization. A correlation between the ionization state of the absorbing gas and the nature of the nearby galaxies has been suggested by the sources detected either in Lyalpha or [C ii] 158 m near to respectively highly-ionized and neutral absorbers. This is also likely linked to the global changes in the incidence of absorption systems of different types and the process of cosmic reionization. Here we report the detection of two [C ii]-emitting galaxies at redshift $z \sim 5.7$ that are associated with a complex high-ionization C iv absorption system. These objects are part of an overdensity of galaxies and have compact sizes (< 2.4 kpc) and narrow line widths (FWHM $\sim$ 62--64 km s-1). Hydrodynamic simulations predict that similar narrow [C ii] emission may arise from the heating of small ($\lesssim$ 3 kpc) clumps of cold neutral medium or a compact photodissociation region. The lack of counterparts in the rest-frame ultraviolet indicates severe obscuration of the sources that are exciting the [C ii] emission. These results may suggest a connection between the properties of the [C ii] emission, the rare overdensity of galaxies and the unusual high ionization state of the gas in this region.
description: Published in Nature on 10 May 2023; authors' version; link to the paper: https://www.nature.com/articles/s41586-023-05901-3
Probing the Coordination and Geometry of Heme-iron Ligands in Hemoproteins by XANES (X-ray Absorption Near Edge Structure)
Creators: name: S. Della Longa
name: M. Benfatto
Publisher: name: INFN Open Access Repository
Year: 2002

description: X-ray Absorption Near Edge Structure (XANES) spectroscopy, is an emerging technique related to EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy. XANES probes the electronic state and the atomic structure of a metal site in biological macromolecules at any physical state of the sample and any environmental condition. For instance, the pH-dependent and temperature-dependent XANES spectra of ferric aquomet-myoglobin in solution have been studied to probe the main Fe-heme conformational changes following its acid-alkaline chemical transition, and the temperature-dependent spin transition of the alkaline form. In these last years, multiple scattering (MS) theory has been shown able to reproduce satisfactorily the experimental XANES data from the edge up to 150-200 eV. The ability to analyse the low-energy part of a x-ray absorption spectrum allows determining structural data that are very difficult to recover by EXAFS, such as bonding angles.  Using light triggered systems allows to study trapped intermediate conformations and some aspects of the dynamics of biological complexes. XANES theory has been applied to interpret the dramatic spectroscopical changes in the XANES spectrum of a carbonmonoxy-myoglobin single crystal, following the photolysis of the Fe-CO bond at T=20K. The distance and orientation of the CO molecule from the Fe atom, and the position of the proximal histidine, have been determined at a resolution comparable with that of the more recent X-ray diffraction (XRD) studies. Preliminary applications of the quantitative XANES analysis to hemoproteins in solutions are also presented.
Irreducible pseudo 2-factor isomorphic cubic bipartite graphs
Creators: name: Abreu, M.
name: Labbate, D.
name: Sheehan, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C38, 05C70, 05C75, 05B30

description: A bipartite graph is {\em pseudo 2--factor isomorphic} if all its 2--factors have the same parity of number of circuits. In \cite{ADJLS} we proved that the only essentially 4--edge-connected pseudo 2--factor isomorphic cubic bipartite graph of girth 4 is $K_{3,3}$, and conjectured \cite[Conjecture 3.6]{ADJLS} that the only essentially 4--edge-connected cubic bipartite graphs are $K_{3,3}$, the Heawood graph and the Pappus graph. There exists a characterization of symmetric configurations $n_3$ %{\bf decide notation and how to use it in the rest of the paper} due to Martinetti (1886) in which all symmetric configurations $n_3$ can be obtained from an infinite set of so called {\em irreducible} configurations \cite{VM}. The list of irreducible configurations has been completed by Boben \cite{B} in terms of their {\em irreducible Levi graphs}. In this paper we characterize irreducible pseudo 2--factor isomorphic cubic bipartite graphs proving that the only pseudo 2--factor isomorphic irreducible Levi graphs are the Heawood and Pappus graphs. Moreover, the obtained characterization allows us to partially prove the above Conjecture.
Combined HERA Deep Inelastic Scattering Data and NLO QCD Fits
Creators: name: Gwenlan, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Previously published data on inclusive neutral and charged current e+p and e-p deep inelastic scattering from HERA have been combined. The new, model-independent method of combining the measured cross sections takes full account of correlated systematics in a coherent way, leading to significantly reduced uncertainties in the combined measurement across the (x, Q^2) plane. The combined cross section data have been used as the sole input for a new next-to-leading order QCD fit to extract the parton distribution functions (PDFs) of the proton. The PDFs extracted have greatly reduced experimental uncertainties, compared to separate QCD analyses on data from H1 and ZEUS. Model uncertainties, including those arising from the parameterisation dependence, have also been carefully considered. The resulting HERA PDFs have impressive precision.
description: 11 pages, 6 figures, prepared for the proceedings of the Ringberg Workshop on "New Trends in HERA Physics 2008", Ringberg Castle, Tegernsee, Oct 5-10, 2008
Can X-rays provide a solution to the abundance discrepancy problem in photoionised nebulae?
Creators: name: Ercolano, Barbara
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We re-examine the well-known discrepancy between ionic abundances determined via the analysis of recombination lines (RLs) and collisionally excited lines (CELs). We show that abundance variations can be mimicked in a {\it chemically homogeneous} medium by the presence of dense X-ray irradiated regions which present different ionisation and temperature structures from those of the more diffuse medium they are embedded in, which is predominantly ionised by extreme-ultraviolet radiation. The presence of X-ray ionised dense clumps or filaments also naturally explains the lower temperatures often measured from O {\sc ii} recombination lines and from the Balmer jump when compared to temperatures determined by CELs. We discuss the implications for abundances determined via the analysis of CELs and RLs and provide a simple analytical procedure to obtain upwards corrections for CEL-determined abundance. While we show that the abundance discrepancy factor (ADF) and the Balmer Jump temperature determined from observations of the Orion Nebula can simultaneously be reproduced by this model (implying upward corrections for CELs by a factor of 1.15), we find that the required X-ray fluxes exceed the known Orion's stellar and diffuse X-ray budget, if we assume that the clumps are located at the edge of the blister. We propose, however, that spatially resolved observations may be used to empirically test the model, and we outline how the framework developed in this letter may be applied in the future to objects with better constrained geometries (e.g. planetary nebulae).
description: 5 pages, accepted for publication by MNRAS Letters
New method of particle identification with tracker detectors
Creators: name: Sikler, Ferenc
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Tracker detectors can be used to identify charged particles based on their global chi value obtained during track fitting with the Kalman filter. This approach builds upon the knowledge of detector material and local position resolution, using the known physics of multiple scattering and energy loss. The proposed method is independent of the traditional way of identification using deposited energy. The performance for present LHC experiments is demonstrated.
description: 12 pages, 5 figures, submitted to Nucl. Istrum. Meth. A
Interstellar magnetic fields in the Galactic center region
Creators: name: Ferriere, Katia
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We seek to obtain a picture of the interstellar magnetic field in the Galactic center region that is as clear and complete as possible. To that end, we review the observational knowledge that has built up over the past 25 years on interstellar magnetic fields within ~ 200 pc of the Galactic center. We then critically discuss the various theoretical interpretations and scenarios proposed to explain the existing observations. We also study the possible connections with the general Galactic magnetic field and describe the observational situation in external galaxies. We propose a coherent picture of the magnetic field near the Galactic center, which reconciles some of the seemingly divergent views and which best accounts for the vast body of observations. Our main conclusions are the following. In the diffuse intercloud medium, the large-scale magnetic field is approximately poloidal and its value is generally close to equipartition with cosmic rays (~ 10 microG), except in localized filaments where the field strength can reach ~ 1 mG. In dense interstellar clouds, the magnetic field is approximately horizontal and its value is typically ~ 1 mG.
description: 16 pages, 2 figures
title: ÐÐ½Ð°Ð»Ð¸Ð· Ð³ÐµÐ¾Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ¸Ñ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº ÑÑÑÐ±Ð¾Ð½Ð°Ð´Ð´ÑÐ²Ð¾ÑÐ½Ð¾Ð³Ð¾ Ð°Ð³ÑÐµÐ³Ð°ÑÐ° Ð¿ÑÐ¾ÑÐ¸Ð²Ð¾Ð¾Ð±Ð»ÐµÐ´ÐµÐ½Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° ÑÐ½Ð¸Ð²ÐµÑÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð°ÑÐ¾Ð¼Ð½Ð¾Ð³Ð¾ Ð»ÐµÐ´Ð¾ÐºÐ¾Ð»Ð° "ÐÐ¸Ð´ÐµÑ"
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¾Ð³Ð¾Ð¼Ð¾Ð»Ð¾Ð²Ð°, ÐÐ°Ð»ÐµÐ½ÑÐ¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÐÐµÐ´Ð¾ÐºÐ¾Ð»Ñ
Ð¢ÑÑÐ±Ð¸Ð½Ð½ÑÐµ ÑÐ¾ÑÐ¾ÑÑ
ÐÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÑ
Ð¢ÑÑÐ±Ð¾ÐºÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÑ ÑÑÐ´Ð¾Ð²ÑÑ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»ÐµÐ¹

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð³ÐµÐ¾Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº ÑÑÑÐ±Ð¾Ð½Ð°Ð´Ð´ÑÐ²Ð¾ÑÐ½Ð¾Ð³Ð¾ Ð°Ð³ÑÐµÐ³Ð°ÑÐ° Ð¿ÑÐ¾ÑÐ¸Ð²Ð¾Ð¾Ð±Ð»ÐµÐ´ÐµÐ½Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° Ð¸ ÑÐ´ÐµÐ»Ð°Ð½ Ð²ÑÐ²Ð¾Ð´ Ð¾ ÑÐ¾Ð¼, ÐºÐ°Ðº ÑÐµÐ·ÑÐ»ÑÑÐ°Ñ Ð²Ð»Ð¸ÑÐµÑ Ð½Ð° ÑÐ°Ð±Ð¾ÑÑ Ð»ÐµÐ´Ð¾ÐºÐ¾Ð»Ð°. ÐÐ°Ð½Ñ Ð¾Ð±ÑÐ¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° Ð»ÐµÐ´Ð¾ÐºÐ¾Ð»Ð¾Ð². ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼ÑÐµ ÑÐ°ÑÑÐµÑÑ.
Interference of nematic quantum critical quasiparticles: a route to the octet model
Creators: name: Kim, Eun-Ah
name: Lawler, Michael J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Repeated observations of inhomogeneity in cuperate superconductors[1-5] make one immediately question the existance of coherent quasiparticles(qp's) and the applicability of a momentum space picture. Yet, obversations of interference effects[6-9] suggest that the qp's maintain a remarkable coherence under special circumstances. In particular, quasi-particle interference (QPI) imaging using scanning tunneling spectroscopy revealed a highly unusual form of coherence: accumulation of coherence only at special points in momentum space with a particular energy dispersion[5-7]. Here we show that nematic quantum critical fluctuations[10], combined with the known extreme velocity anisotropy[11] provide a natural mechanism for the accumulation of coherence at those special points. Our results raise the intriguing question of whether the nematic fluctuations provide the unique mechanism for such a phenomenon.
description: 4 pages, 3 figures
The nuclear quadrupole resonance of B11 in inderite
Creators: name: Sahri, Darshan Singh
Publisher: name: University of British Columbia
Year: 2011

description: This work was undertaken to verify the results of Pennington and Petch. They studied the effect of quadrupole perturbation on the n. m .r. spectrum of B¹¹ in inderite and from these studies found the values of quadrupole coupling constants and asymmetry parameters of the crystalline electrostatic fields for different sites of B¹¹. This data has been used in the present work to predict the "pure" quadrupole resonance frequencies. The resonance frequency for the M site has been experimentally measured. The result is within 1% of the predicted value. The improvements made in the spectrometers are discussed.
Ultradeep Ks Imaging in the GOODS-N
Creators: name: Wang, Wei-Hao
name: Cowie, Lennox L.
name: Barger, Amy J.
name: Keenan, Ryan C.
name: Ting, Hsiao-Chiang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an ultradeep Ks-band image that covers 0.5*0.5 deg^2 centered on the Great Observatories Origins Deep Survey-North (GOODS-N). The image reaches a 5 σdepth of Ks(AB) = 24.45 in the GOODS-N region, which is as deep as the GOODS-N Spitzer Infrared Array Camera (IRAC) 3.6 μm image. We present a new method of constructing IRAC catalogs that uses the higher spatial resolution Ks image and catalog as priors and iteratively subtracts fluxes from the IRAC images to estimate the IRAC fluxes. Our iterative method is different from the χ^2 approach adopted by other groups. We verified our results using data taken in two different epochs of observations, as well as by comparing our colors with the colors of stars and with the colors derived from model spectral energy distributions (SEDs) of galaxies at various redshifts. We make available to the community our WIRCam Ks-band image and catalog (94951 objects in 0.25 deg^2), the Interactive Data Language (IDL) pipeline used for reducing the WIRCam images, and our IRAC 3.6 to 8.0 μm catalog (16950 objects in 0.06 deg^2 at 3.6 μm). With this improved Ks and IRAC catalog and a large spectroscopic sample from our previous work, we study the color-magnitude and color-color diagrams of galaxies. We compare the effectiveness of using Ks and IRAC colors to select active galactic nuclei (AGNs) and galaxies at various redshifts. We also study a color selection of z = 0.65--1.2 galaxies using the Ks, 3.6 μm, and 4.5 μm bands.
description: Accepted for publication on ApJS. Online data are available
Optical transformation from chirplet to fractional Fourier transformation kernel
Creators: name: Fan, Hong-yi
name: Hu, Li-yun
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We find a new integration transformation which can convert a chirplet function to fractional Fourier transformation kernel, this new transformation is invertible and obeys Parseval theorem. Under this transformation a new relationship between a phase space function and its Weyl-Wigner quantum correspondence operator is revealed.
description: 3 pages, no figure
ABU NASR FOROBIYNING AXLOQIY VA TARBIYAVIY QARASHLARI
Creators: name: Djumaniyazova Qalbike Qalievna Nukus shahar №36-sonli umumta'lim maktabi o'qituvchisi
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqolada Abu Nasr Forobiyning axloqiy qarashlari, jumladan, ta’lim-tarbiya masalalari, adolatli jamiyatga erishish yoʻllari, fozil shahar hokimi va aholisining fazilatlari kabi masalalar yoritilgan.  

Kalit so‘zlar: davlat, jamiyat, axloq, xulq, odob, ta’lim, tarbiya, gumanist
title: Ð¡Ð¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÐ±Ð¾ÑÐºÐ¸ Ð¸ ÑÐ²Ð°ÑÐºÐ¸ ÐºÐ¾Ð»ÐµÑÐ° Ð³Ð¸Ð´ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ñ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÑÑÑÐ»ÐµÐ², ÐÐ³Ð¾ÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð³Ð¸Ð´ÑÐ°Ð²Ð»Ð¸ÑÐµÑÐºÐ°Ñ ÑÑÑÐ±Ð¸Ð½Ð°
ÑÐ±Ð¾ÑÐºÐ°
ÑÐ²Ð°ÑÐºÐ°
ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ°ÑÐµÑÑÐ²Ð° ÑÐ²Ð°ÑÐ½Ð¾Ð¹ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸
ÑÐ²Ð°ÑÐ¾ÑÐ½Ð¾Ðµ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ

description: Ð Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð²Ð¸Ð´Ñ Ð³Ð¸Ð´ÑÐ°Ð²Ð»Ð¸ÑÐµÑÐºÐ¸Ñ ÑÑÑÐ±Ð¸Ð½, Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½ÑÐ¼Ð¸ ÑÐ²Ð»ÑÑÑÑÑ ÑÐ°Ð´Ð¸Ð°Ð»ÑÐ½Ð¾-Ð¾ÑÐµÐ²ÑÐµ Ð³Ð¸Ð´ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ñ. ÐÐ·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ðµ Ð·Ð°Ð³Ð¾ÑÐ¾Ð²Ð¾Ðº ÑÐ°Ð±Ð¾ÑÐµÐ³Ð¾ ÐºÐ¾Ð»ÐµÑÐ° Ð²ÐºÐ»ÑÑÐ°ÐµÑ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ Ð¾Ð¿ÐµÑÐ°ÑÐ¸Ð¹. Ð¡Ð²Ð°ÑÐºÐ° Ð·Ð°Ð³Ð¾ÑÐ¾Ð²Ð¾Ðº Ð²ÑÐ¿Ð¾Ð»Ð½ÑÐµÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÑÐ»ÐµÐºÑÑÐ¾ÑÐ»Ð°ÐºÐ¾Ð²Ð¾Ð¹ ÑÐ²Ð°ÑÐºÐ¸ Ð¸ ÑÐ²Ð°ÑÐºÐ¸ Ð² ÑÐ¼ÐµÑÐ¸ Ð·Ð°ÑÐ¸ÑÐ½ÑÑ Ð³Ð°Ð·Ð¾Ð². ÐÐ°Ð¶Ð½ÑÐ¼Ð¸ ÑÑÐ°Ð¿Ð°Ð¼Ð¸ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ ÐºÐ¾Ð»ÐµÑÐ° ÑÑÑÐ±Ð¸Ð½Ñ ÑÐ²Ð»ÑÐµÑÑÑ ÑÐ±Ð¾ÑÐ¾ÑÐ½Ð¾-ÑÐ²Ð°ÑÐ¾ÑÐ½ÑÐµ Ð¾Ð¿ÐµÑÐ°ÑÐ¸Ð¸. ÐÐ»Ñ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ ÐºÐ¾Ð»ÐµÑÐ° ÑÑÑÐ±Ð¸Ð½Ñ Ð² Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½Ð¾Ð¼ Ð¿ÑÐ¾ÐµÐºÑÐµ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¾ ÑÐ²Ð°ÑÐ¾ÑÐ½Ð¾Ðµ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½Ð°Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ñ ÑÐ´Ð¾Ð²Ð»ÐµÑÐ²Ð¾ÑÑÐµÑ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸ÑÐ¼ Ð½Ð¾ÑÐ¼Ð°ÑÐ¸Ð²Ð½Ð¾Ð¹ Ð´Ð¾ÐºÑÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ð¸.
Modeling The GRB Host Galaxy Mass Distribution: Are GRBs Unbiased Tracers of Star Formation?
Creators: name: Kocevski, Daniel
name: West, Andrew A.
name: Modjaz, Maryam
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We model the mass distribution of long gamma-ray burst (GRB) host galaxies given recent results suggesting that GRBs occur in low metallicity environments. By utilizing measurements of the redshift evolution of the mass-metallicity (M-Z) relationship for galaxies, along with a sharp host metallicity cut-off suggested by Modjaz and collaborators, we estimate an upper limit on the stellar mass of a galaxy that can efficiently produce a GRB as a function of redshift. By employing consistent abundance indicators, we find that sub-solar metallicity cut-offs effectively limit GRBs to low stellar mass spirals and dwarf galaxies at low redshift. At higher redshifts, as the average metallicity of galaxies in the Universe falls, the mass range of galaxies capable of hosting a GRB broadens, with an upper bound approaching the mass of even the largest spiral galaxies. We compare these predicted limits to the growing number of published GRB host masses and find that extremely low metallicity cut-offs of 0.1 to 0.5 solar are effectively ruled out by a large number of intermediate mass galaxies at low redshift. A mass function that includes a smooth decrease in the efficiency of producing GRBs in galaxies of metallicity above 12+log(O/H)_(KK04) ~ 8.7 can, however, accommodate a majority of the measured host galaxy masses. We find that at z ~ 1, the peak in the observed GRB host mass distribution is inconsistent with the expected peak in the mass of galaxies harboring most of the star formation. This suggests that GRBs are metallicity biased tracers of star formation at low and intermediate redshifts, although our model predicts that this bias should disappear at higher redshifts due to the evolving metallicity content of the universe.
description: 11 pages, 9 figures, submitted to ApJ on Feb 5th, 2009
Casimir stress in and force on a metal slab in a planar cavity
Creators: name: Tomas, Marin-Slobodan
name: Lenac, Zdravko
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Emphasizing first the utility of the generalized Fresnel coefficients in the theory of the Casimir effect in planar cavities, we complement our previous discussion of the ordinary Casimir force on and the Casimir stress in a metal (plasma) slab in a planar cavity. We demonstrate strong dependence of the Casimir stress in a thin slab on properties of the bounding medium in the symmetric Lifshitz configuration. Contrary to this, the stress in a thick slab gradually becomes insensitive on external boundary conditions. We also consider the position dependence of the Casimir force on and stress in a thin metal slab in a planar cavity. Whereas the force per unit area on the slab strongly increases when it approaches a mirror the stress in the slab decreases and eventually changes the sign. Generally, the stress decreases with the cavity width and decreasing reflectivity of the mirrors.
description: 5 pages, 3 figures, contribution to Proceedings of QFEXT09, September 21-25, Norman, OK, USA
Comment on "Time modulation of the K-shell electron capture decay rates of H-like heavy ions at GSI experiments", arXiv:0908.0877
Creators: name: Flambaum, V. V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: According to GSI experiment Phys.Lett.B 664, 162 (2008), the rate of the daughter ion production by the K-shell electron capture (with neutrino emission) in H-like ions 142Pm, 140Pr and 152I is modulated with a period of 6 to 7 seconds. In PRL 103, 062502, 2009 by Ivanov and Kienle (also by Lipkin}) there is a claim that neutrino oscillations may explain this result. In arXiv:0811.2302 by Lambiase et al a different explanation is suggested which is based on the rotation of electron and nuclear spins. The aim of this Comment is to show why these explanations are not satisfactory and to discuss other possibilities.
description: Comment to Phys. Rev. Lett. 103, 062502 (2009), also to Lipkin arXiv articles and Lambiase et al arXiv:0811.2302
title: Experimental Study upon the Influence of Single-Layer Wire Mesh on Premixed Methane-Air Flame Behavior and Pressure Dynamics in a Closed Duct
Creators: name: Jin, K.
name: Duan, Q.
name: Xiao, H.
name: Li, P.
name: Chen, J.
name: Gong, L.
name: Liew, K.
name: Sun, J.
name: International Seminar On Fire And Explosion Hazards (9; 2019; Saint Petersburg, Russia)
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019

description: An experimental study on the influence of single-layer wire mesh on premixed methane-air flame
behavior and pressure dynamics in a closed duct is conducted. Premixed methane-air mixture with
equivalence ratio Î¦ = 1 is used in our experiments. Seven different kinds of wire mesh are chosen. Highspeed
schlieren photography system is applied to capture flame behaviors. Two pressure transducers are
used to record the pressure-time history. It is found that the flame propagates through the wire mesh in the
cases of 12 and 20 mesh, but quenches in the case of 30 mesh. For the cases of 40, 60, 80, and 100 mesh,
the flame presents salient quenching tendency but finally propagates through the suppression zone with
wire mesh being destroyed, which fully demonstrates that the anti-destructive performance of wire mesh
should be also considered in particular. Moreover, it is found that the single-layer wire mesh can directly
influence the flame behavior. The single-layer wire mesh makes the tulip flame formation time advanced
and makes the flame front inversion extent weaker compared with the case of no wire mesh. In addition,
it is found that the single-layer wire mesh has no suppression effect on flame tip speed in the upstream
duct, but delays the flame propagation in the suppression zone. Besides, the single-layer wire mesh can
effectively suppress the maximum pressure, and the suppression effect increases as the increase of mesh
of wire mesh. Finally, all of the potential mechanisms of the influence of single-layer wire mesh on
premixed methane-air flame behavior, flame tip speed, and pressure are analyzed in this paper.
Adaptive Subcarrier PSK Intensity Modulation in Free Space Optical Systems
Creators: name: Chatzidiamantis, Nestor D.
name: Lioumpas, Athanasios S.
name: Karagiannidis, George K.
name: Arnon, Shlomi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We propose an adaptive transmission technique for free space optical (FSO) systems, operating in atmospheric turbulence and employing subcarrier phase shift keying (S-PSK) intensity modulation. Exploiting the constant envelope characteristics of S-PSK, the proposed technique offers efficient utilization of the FSO channel capacity by adapting the modulation order of S-PSK, according to the instantaneous state of turbulence induced fading and a pre-defined bit error rate (BER) requirement. Novel expressions for the spectral efficiency and average BER of the proposed adaptive FSO system are presented and performance investigations under various turbulence conditions and target BER requirements are carried out. Numerical results indicate that significant spectral efficiency gains are offered without increasing the transmitted average optical power or sacrificing BER requirements, in moderate-to-strong turbulence conditions. Furthermore, the proposed variable rate transmission technique is applied to multiple input multiple output (MIMO) FSO systems, providing additional improvement in the achieved spectral efficiency as the number of the transmit and/or receive apertures increases.
description: Submitted To IEEE Transactions On Communications
The changing look of PKS 2149-306
Creators: name: Bianchin, V.
name: Foschini, L.
name: Ghisellini, G.
name: Tagliaferri, G.
name: Tavecchio, F.
name: Treves, A.
name: Di Cocco, G.
name: Gliozzi, M.
name: Pian, E.
name: Sambruna, R. M.
name: Wolter, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Aims: We study the blazar nature of the high-redshift Flat-Spectrum Radio Quasar PKS 2149-306 (z = 2.345) by investigating its long-term behavior. Methods: We analyzed all publicly available optical-to-X-ray observations performed by XMM-Newton, Swift, and INTEGRAL. Conclusions: PKS 2149-306 is one of four blazars at z>2 that have been observed in the hard-X-ray regime with both the BAT and ISGRI instruments. Observations acquired almost 1 year apart in the 60-300 keV energy band in the object rest frame, exhibit no noticeable change in spectral slope associated with a flux variation of more than a factor of two. Swift data appear to show a roll-off below ~1 keV, which becomes increasingly evident during a ~3-day time-frame, that can be explained as the natural spectral break caused by the Inverse Compton onset. The broad-band spectra allow us to identify two different states. The SED modeling suggests that they can be interpreted by only a change in the bulk Lorentz factor of the jet.
description: 7 pages, 2 figures. A&A accepted for publication
Supersymmetric non-relativistic geometries in M-theory
Creators: name: Ooguri, Hirosi
name: Park, Chang-Soon
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct M-theory supergravity solutions with the non-relativistic Schrodinger symmetry starting from the warped AdS_5 metric with N=1 supersymmetry. We impose the condition that the lightlike direction is compact by making it a non-trivial U(1) bundle over the compact space. Sufficient conditions for such solutions are analyzed. The solutions have two supercharges for generic values of parameters, but the number of supercharges increases to six in some special cases. A Schrodinger geometry with SU(2)xSU(2)xU(1) isometry is considered as a specific example. We consider the Kaluza-Klein modes and show that the non-relativistic particle number is bounded above by the quantum numbers of the compact space.
description: 25 parges; v2: references added
Large mass inflow rates in Saturn's rings due to ballistic transport and mass loading
Creators: name: Durisen, R. H.
name: Estrada, Paul. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Cassini mission provided key measurements needed to determine the absolute age of Saturn's rings, including the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy pollutants in the rings, and the total ring mass. These three factors constrain the ring age to be no more than a few 100 Myr (Kempf et al., 2023). Observations during the Cassini Grand Finale also showed that the rings are losing mass to the planet at a prodigious rate. Some of the mass flux falls as "ring rain" at high latitudes. However, the influx in ring rain is considerably less than the total measured mass influx of 4800 to 45000 kg/s at lower latitudes (Waite et al., 2018). In addition to polluting the rings, micrometeoroid impacts lead to ballistic transport, the mass and angular momentum transport due to net exchanges of meteoroid impact ejecta. Because the ejecta are predominantly prograde, they carry net angular momentum outward. As a result, ring material drifts inward toward the planet. Here, for the first time, we use a simple model to quantify this radial mass inflow rate for dense rings and find that, for plausible choices of parameters, ballistic transport and mass loading by meteoroids can produce a total inward flux of material in the inner B ring and in the C ring that is on the order of a few x 10^3 to a few x 10^4 kg/s, in agreement with measurements during the Cassini Grand Finale. From these mass inflow rates, we estimate that the remaining ring lifetime is ~15 to 400 Myr. Combining this with a revised pollution age of ~120 Myr, we conclude that Saturn's rings are not only young but ephemeral and probably started their evolution on a similar timescale to their pollution age with an initial mass of one to a few Mimas masses.
description: 25 pages, 6 figures, Published in Icarus
A novel architecture for DAQ in multi-channel, large volume, long drift
  Liquid Argon TPC
Creators: name: S. Centro
name: G. Meng
name: F. Pietropaolo
name: S. Ventura
Publisher: name: INFN Open Access Repository
Year: 2006

description: Recently a large interest has been shown for multi-ton Liquid Argon
Time-Projection-Chambers (LAr-TPC). The physics issues are very challenging,
but the technical problem of long drifts and adequately long life-time of free
electrons are not solved at all so far. Also one should take into account the
extremely large number of channels required for such large volumes. In this
paper we propose an architecture for DAQ that is based on recent developments
in consumer electronics that made available, at a quite interesting price,
components aimed to high-resolution delta-sigma conversion. This type of ADC is
not at all popular in HEP experiments where normally signals related to events,
well defined in time (triggered), should be converted and recorded. In the
LAr-TPC however we have to deal rather with waveforms that should be converted
and recorded continuously, that is the paramount case of delta-sigma ADC
application.
Wire Compensation of Parasitic Crossings in DAFNE
Creators: name: C. Milardi
name: D. Alesini
name: M. A. Preger
name: P. Raimondi
name: M. Zobov
name: D. Shatilov
Publisher: name: Conf.Proc.C060626:2808-2810,2006
Year: 2006

description: Long-range beam-beam interactions (parasitic crossings) are one of the main
luminosity performance limitations for the Frascati e+e- Phi-factory DAFNE. In
particular, the parasitic crossings lead to a substantial lifetime reduction of
both beams in collision. This puts a limit on the maximum storable current and,
as a consequence, on the achievable peak and integrated luminosity. In order to
alleviate the problem numerical and experimental studies of the parasitic
crossings compensation with current-carrying wires have been performed at
DAFNE. Two such wires have been installed at both ends of the KLOE interaction
region. Switching on the wires in agreement with the numerical predictions,
improvement in the lifetime of the 'weak' beam (positrons) has been obtained at
the maximum current of the 'strong' one (electrons) without luminosity loss. In
this paper we describe the parasitic crossings effects in DAFNE, summarize the
results of numerical simulations on their compensation with the wires and
discuss the experimental measurements and observations.
title: ÐÐ°Ð¿ÑÐ»ÐµÐ½Ð¸Ðµ Ð¿Ð¾ÑÐ¾ÑÐºÐ¾Ð²Ð¾Ð³Ð¾ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð° Al2O3-CrO3 Ð½Ð° ÑÑÐ°Ð»ÑÐ½ÑÑ Ð¿Ð¾Ð´Ð»Ð¾Ð¶ÐºÑ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¼Ð¸ÑÑÑÐº, ÐÑÑÐµÐ¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð¿Ð¾ÑÐ¾ÑÐºÐ¾Ð²ÑÐ¹ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»
Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ðµ Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ðµ
Ð¸Ð·Ð½Ð¾ÑÐ¾ÑÑÐ¾Ð¹ÐºÐ¸Ðµ Ð¿Ð¾ÐºÑÑÑÐ¸Ñ

description: ÐÐ¸ÑÑÐµÑÑÐ°ÑÐ¸Ñ ÑÐ¾ÑÑÐ¾Ð¸Ñ Ð¸Ð· Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ñ, Ð´Ð²ÑÑ Ð³Ð»Ð°Ð² Ð¸ Ð·Ð°ÐºÐ»ÑÑÐµÐ½Ð¸Ñ. ÐÐ¾ Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ð¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²ÑÐ²Ð°ÐµÑÑÑ Ð°ÐºÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ Ð²ÑÐ±ÑÐ°Ð½Ð½Ð¾Ð¹ ÑÐµÐ¼Ñ, ÑÐ¾ÑÐ¼ÑÐ»Ð¸ÑÑÐµÑÑÑ ÑÐµÐ»Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, ÑÐºÐ°Ð·ÑÐ²Ð°ÐµÑÑÑ Ð¾Ð±ÑÐµÐºÑ Ð¸ Ð¿ÑÐµÐ´Ð¼ÐµÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ. ÐÐµÑÐ²Ð°Ñ Ð³Ð»Ð°Ð²Ð° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð²Ð¾Ð¿ÑÐ¾ÑÐ¾Ð², Ð² Ð½ÐµÐ¹ ÑÐ°ÑÐºÑÑÐ²Ð°ÑÑÑÑ Ð¿Ð¾Ð½ÑÑÐ¸Ðµ Ð¸ ÑÑÑÐ½Ð¾ÑÑÑ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² Ð½Ð°Ð½ÐµÑÐµÐ½Ð¸Ñ Ð¸Ð·Ð½Ð¾ÑÐ¾ÑÑÐ¾Ð¹ÐºÐ¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹ (Ð¿Ð¾Ð´ÑÐ¾Ð±Ð½Ð¾ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ðµ Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ðµ), ÑÐ²Ð¾Ð¹ÑÑÐ²Ð° ÑÐ°ÐºÐ¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹. ÐÐ¾ Ð²ÑÐ¾ÑÐ¾Ð¹ Ð³Ð»Ð°Ð²Ðµ ÑÑÐ°Ð²Ð¸ÑÑÑ Ð·Ð°Ð´Ð°ÑÐ° Ð²ÑÐ¿Ð¾Ð»Ð½ÑÐµÐ¼Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ, Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½Ñ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÑÐ»Ð¾Ð²Ð¸Ñ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÐ¼Ð¾Ð³Ð¾ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð°, ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾ÑÐ°Ð·Ð¾Ð²ÑÐ¹ Ð¸ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ Ð°Ð½Ð°Ð»Ð¸Ð·Ñ. ÐÐ°ÐºÐ»ÑÑÐµÐ½Ð¸Ðµ ÑÐ¾Ð´ÐµÑÐ¶Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ Ð²ÑÐ²Ð¾Ð´Ñ Ð¿Ð¾ Ð¿ÑÐ¾Ð´ÐµÐ»Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ, Ð° ÑÐ°Ðº Ð¶Ðµ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ Ð¿ÑÐ¾Ð´Ð¾Ð»Ð¶ÐµÐ½Ð¸Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹.
Induced representations of the one dimensional quantum Galilei group
Creators: name: F. Bonechi
name: R. Giachetti
name: E. Sorace
name: M. Tarlini
Publisher: name: INFN Open Access Repository
Year: 1997

description: We study the representations of the quantum Galilei group by a suitable
generalization of the Kirillov method on spaces of non commutative functions.
On these spaces we determine a quasi-invariant measure with respect to the
action of the quantum group by which we discuss unitary and irreducible
representations. The latter are equivalent to representations on \ell^2, i.e.
on the space of square summable functions on a one dimensional lattice.
Negative Impurity Magnetic Susceptibility and Heat Capacity in a Kondo Model with Narrow Peaks in the Local Density of Electron States
Creators: name: Zhuravlev, A. K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Temperature dependencies of the impurity magnetic susceptibility, entropy, and heat capacity have been obtained by the method of numerical renormalization group and exact diagonalization for the Kondo model with peaks in the electron density of states near the Fermi energy (in particular, with logarithmic Van Hove singularities). It is shown that these quantities can be {\it negative}. A new effect has been predicted (which, in principle, can be observed experimentally), namely, the decrease in the magnetic susceptibility and heat capacity of a nonmagnetic sample upon the addition of magnetic impurities into it.
Bose-Einstein Correlations in Multihadron Events at LEP
Creators: name: C. Ciocca
name: M. Cuffiani
name: G. Giacomelli
Publisher: name: ECONFC0706044:13,2007
Year: 2007

description: Bose-Einstein correlations in pairs of identical particles were analyzed in
e+ e- multihadron annihilations at ~91.2 GeV at LEP. The first studies involved
identical charged pions and the emitting source size was determined. Then the
study of charged kaons suggested that the radius depends on the mass of the
emitted particles. Subsequenty the dependence of the source radius on the event
multiplicity was analyzed. The study of the correlations in neutral pions and
neutral kaons extended these concepts to neutral particles. The shape of the
source was analyzed in 3 dimensions and was found not to be spherically
symmetric. In recent studies at LEP the correlations were analyzed in intervals
of the average pair transverse momentum and of the pair rapidity to study the
correlations between the pion production points and their momenta
(position-momentum correlations). The latest e+ e- data are consistent with an
expanding source.
Gas source mass spectrometry of trace leads from Sudbury, Ontario
Creators: name: Ulrych, Tadeusz Jan
Publisher: name: University of British Columbia
Year: 2011

description: The measurement of lead isotope abundances with a gas source mass spectrometer has been limited to lead ores and minerals. This thesis describes a technique by means of which the sample size necessary for a precise gas source analysis has been decreased by more than two orders of magnitude. In this way, the range of minerals which may be studied by means of a gas source mass spectrometer has been greatly extended. No particular effort has been made to analyze very small samples. The technique which has been developed begins with the evaporation of lead from a mineral to form a mirror. The synthesis of tetramethyllead is completed by the reaction of free methyl radicals with the lead mirror followed by gas chromatographic purification. The free radical method has been applied to the study of lead isotope abundance variations in the mining district of Sudbury, Ontario. A satisfactory chronological history for this region has not been obtained from the many conventional age determinations that exist. The analysis of lead from various sulphides has yielded lead isotope ratios which are linearly related on a plot of Pb²⁰⁷/Pb²⁰⁴ vs. Pb²⁰⁶/Pb²⁰⁴ with a slope of 0.131 ± 0.003. The standard deviation of points from their best straight line is 0.37% of the average Pb²⁰⁷/Pb²⁰⁴ value. From these results it is concluded that the linear relationship is the result of just two geological events, which fact simplifies the possible interpretations. The maximum ages for these two events are 2150 ± 50 million years and 1280 ± 50 million years. Two interpretations of the results are suggested. The first gives ages of 1950 million years and 350 million years for the primary and secondary events. The two events in the second interpretation are considered to have occurred 1600 million years and 950 million years ago. The second interpretation is more easily defended on geological grounds. The simple relationship of lead isotope ratios which has been observed in the Sudbury district is particularly significant in view of the geological complexity of this region. Thus the technique developed may be expected to have wide application.
Quantizable non-local gravity
Creators: name: Diego, Marin
Publisher: name: INFN Open Access Repository
Year: 2012

description: It's widely recognized that general relativity emerges if we impose
invariance under local translations and local Lorentz transformations. In the
same manner supergravity arises when we impose invariance under local
supersymmetry. In this paper we show how to treat general relativity as a
common gauge theory, without introducing a metric or a tetrad field. The price
to pay for such simplification is the acceptance of non-locality. At first
glance the resulting theory seems renormalizable. Finally we derive Feynman
vertices for such theory.
title: Ð¤ÑÐ°Ð³Ð¼ÐµÐ½Ñ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¹ Ð¾ ÑÐ¸ÑÐ½ÐµÑÐµ Ñ Ð¿Ð¾Ð·Ð¸ÑÐ¸Ð¹ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð°
title: Fragment of ideas about fitness from the perspective of methodological analysis
Creators: name: ÐÑÐºÑÑÐ½ÐµÐ½ÐºÐ¾, ÐÐ¸ÐºÑÐ¾Ñ
name: ÐÑÐºÑÑÐ½ÐµÐ½ÐºÐ¾, ÐÐ°ÑÐ°Ð»ÑÑ
name: "Ð¡Ð¿Ð¾ÑÑ, ÑÐµÐ»Ð¾Ð²ÐµÐº, Ð·Ð´Ð¾ÑÐ¾Ð²ÑÐµ", Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐ¹ Ð½Ð°ÑÑÐ½ÑÐ¹ ÐºÐ¾Ð½Ð³ÑÐµÑÑ
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2023
Subjects: ÑÐ¸ÑÐ½ÐµÑ
Ð¸ÑÑÐ¾ÑÐ¸Ñ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ
Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ñ
ÑÐ¾Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ð¹
Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ðµ
fitness
history of development
methodology
correlation of concepts
education

description: Ð¦ÐµÐ»Ñ â Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ÑÑÐ¾ÑÐ¸Ð¸ Ð¸ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ ÑÐ¸ÑÐ½ÐµÑÐ°, Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¿ÐµÑÑÐ¿ÐµÐºÑÐ¸Ð² ÐµÐ³Ð¾ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ Ñ Ð¿Ð¾Ð·Ð¸ÑÐ¸Ð¹ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð°. ÐÐµÑÐ¾Ð´Ñ: Ð°Ð½Ð°Ð»Ð¸Ð· Ð¸ ÑÐ¸Ð½ÑÐµÐ· Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐ°ÑÐ¸Ð¸; ÑÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½Ð¾-ÑÐ¾Ð¿Ð¾ÑÑÐ°Ð²Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð¸ ÐºÐ°ÑÐµÐ³Ð¾ÑÐ¸Ð°Ð»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð·, Ð¼ÐµÑÐ¾Ð´ Ð½Ð°ÑÑÐ½Ð¾Ð¹ ÑÐµÐ´ÑÐºÑÐ¸Ð¸. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¸ÑÑÐ¾ÑÐ¸ÑÐµÑÐºÐ¸Ðµ, Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ, Ð¿Ð¾Ð½ÑÑÐ¸Ð¹Ð½Ð¾-ÑÐµÑÐ¼Ð¸Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ñ ÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¸ÑÐ½ÐµÑÐ° Ð¸ ÑÐ¸ÑÐ½ÐµÑ-Ð¸Ð½Ð´ÑÑÑÑÐ¸Ð¸ Ð² ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ð¼ Ð¾Ð±ÑÐµÑÑÐ²Ðµ. ÐÐ½Ð¸Ð¼Ð°Ð½Ð¸Ðµ Ð°ÐºÑÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¾ Ð½Ð° Ð´Ð¸ÑÐºÑÑÑÐ¸Ð¾Ð½Ð½ÑÑ Ð°ÑÐ¿ÐµÐºÑÐ°Ñ, Ð¾ÑÐ»Ð¾Ð¶Ð½ÑÑÑÐ¸Ñ Ð±Ð¾Ð»ÐµÐµ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¸Ð²Ð½Ð¾Ðµ ÐµÐ³Ð¾ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ Ð¿Ð¾Ð»Ð½Ð¾Ðµ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ ÐµÐ³Ð¾ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÐµÐ¹.
description: The goal is to study the history and current state of fitness, to determine the prospects for its development from the standpoint of methodological analysis. Methods: analysis and synthesis of the problem situation; comparative and categorical analysis, method of scientific reduction. The historical, methodological, conceptual and terminological foundations of the formation and functioning of fitness and the fitness industry in modern society are considered. Attention is focused on the debatable aspects that complicate its more productive functioning and the fullest use of its capabilities.
Supergravity Solutions Without Tri-holomorphic U(1) Isometries
Creators: name: Ghezelbash, A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the construction of five-dimensional supergravity solutions that don't have any tri-holomorphic U(1) isometries. We construct a class of solutions that in various limits of parameters reduces to many of previously constructed five-dimensional supergravity solutions based on both hyper-Kahler base spaces that can be put into a Gibbons-Hawking form and hyper-Kahler base spaces that can't be put into a Gibbons-Hawking form. We find a new solution which is over triaxial Bianchi type IX Einstein-hyperkahler base space with no tri-holomorphic U(1) symmetry. One special case of this solution corresponds to five-dimensional solution based on Eguchi-Hanson type II geometry.
description: 15 pages, 2 figures
Neutral B Meson Mixing in Unquenched Lattice QCD
Creators: name: Gámiz, Elvira
name: Davies, Christine T. H.
name: Lepage, G. Peter
name: Shigemitsu, Junko
name: Wingate, Matthew
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study $B_d$ and $B_s$ mixing in unquenched lattice QCD employing the MILC collaboration gauge configurations that include u, d, and s sea quarks based on the improved staggered quark (AsqTad) action and a highly improved gluon action. We implement the valence light quarks also with the AsqTad action and use the nonrelativistic NRQCD action for the valence b quark. We calculate hadronic matrix elements necessary for extracting CKM matrix elements from experimental measurements of mass differences $ΔM_d$ and $ΔM_s$. We find $ξ= f_{B_s} \sqrt{\hat{B}_{B_s}} / f_{B_d} \sqrt{\hat{B}_{B_d}} = 1.258(33)$, $f_{B_d} \sqrt{\hat{B}_{B_d}} = 216(15)$ MeV and $f_{B_s} \sqrt{\hat{B}_{B_s}} = 266(18)$ MeV. We also update previous results for decay constants and obtain $f_{B_d} = 190(13)$ MeV, $f_{B_s} = 231(15)$ MeV and $f_{B_s}/f_{B_d} = 1.226(26)$. The new lattice results lead to updated values for the ratio of CKM matrix elements $|V_{td}|/|V_{ts}|$ and for the Standard Model prediction for $Br(B_s \rightarrow μ^+ μ^-)$ with reduced errors. We determine $|V_{td}|/|V_{ts}| = 0.214(1)(5)$ and $Br(B_s \rightarrow μ^+ μ^-) = 3.19(19) \times 10^{-9}$.
description: 12 pages, 10 postscript figures, version to appear in Phys.Rev.D. Two new figures, Fig.6 and Fig.10, added. Result on branching fraction Br(B_s \rightarrow mu^+, mu^-) added. Other results on decay constants and on \xi unchanged
Turbulence modeling and the physics of the intra-cluster medium
Creators: name: Iapichino, L.
name: Maier, A.
name: Schmidt, W.
name: Niemeyer, J. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a new numerical scheme arising from the combined use of subgrid scale (SGS) model for turbulence at the unresolved length scales and adaptive mesh refinement (AMR) for resolving the large scales. This tool is especially suitable for the study of turbulent flows in strongly clumped media. In this contribution, the main features of FEARLESS are briefly outlined. We then summarize the main results of FEARLESS cosmological simulations of galaxy cluster evolution. In clusters, the production of turbulence is closely correlated with merger events; for minor mergers, we find that turbulent dissipation affects the cluster energy budget only locally. The level of entropy in the cluster core is enhanced in FEARLESS simulations, in accord with a better modeling of the unresolved flow, and with its feedback on the resolved mixing in the ICM.
description: To appear in the proceedings of the "Invisible Universe International Conference"