cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Role of the digital for the Third Sector in the Campania region (Italy): From the side of research to the side of the objects in the aftermath of the COVID-19 pandemic
Creators: name: Punziano, Gabriella
name: Cicellin, Mariavittoria
name: Zito, Eugenio
name: Acampa, Suania
name: Sorrentino, Rosa
Publisher: name: Italian Sociological Review
Year: 2023

description: This paper aims to investigate the role of the digital in facing the social and practical impact of the Covid-19 pandemic on particularly fragile and affected realities, Third Sector Organizations (TSO), in a context pervaded by structural and socio-economic weaknesses, the Campania Region in south Italy. It analyzes the digital object as: 1. a process - digitization/digitalization and digital transformation, 2. as a scenario - in which identities, activities, and alternative spaces of use or data collection transit and are constructed, and as 3. skills and capabilities - as social capital and value. This re-framing work is intended to be a useful tool for reflecting on the role of digital in research processes, while also offering a contribution to the debate on the Third Sector in contexts of crisis, such as the one generated by the COVID-19 pandemic, that impact its existence, activity, shape, and perspectives.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)
Improved Photometry for the DASCH Pipeline
Creators: name: Tang, Sumin
name: Grindlay, Jonathan
name: Los, Edward
name: Servillat, Mathieu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Digital Access to a Sky Century@Harvard (DASCH) project is digitizing the ~500,000 glass plate images obtained (full sky) by the Harvard College Observatory from 1885-1992. Astrometry and photometry for each resolved object are derived with photometric rms values of ~0.15mag for the initial photometry analysis pipeline. Here we describe new developments for DASCH photometry, applied to the Kepler field, that has yielded further improvements, including better identification of image blends and plate defects by measuring image profiles and astrometric deviations. A local calibration procedure using nearby stars in a similar magnitude range as the program star (similar to what has been done for visual photometry from the plates) yields additional improvement for a net photometric rms ~0.1mag. We also describe statistical measures of light curves that are now used in the DASCH pipeline processing to autonomously identify new variables. The DASCH photometry methods described here are used in the pipeline processing for the Data Releases of DASCH data (Grindlay et al. 2012; http://dasch.rc.fas.harvard.edu), as well as for the long-term variables discovered by DASCH in the Kepler field (Tang et al, in preparation).
description: 11 pages, 9 figures, and 2 tables. Accepted for publication in PASP
The STAR W Program at RHIC
Creators: name: Stevens, Justin R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The production of $W$ bosons in polarized $p+p$ collisions at RHIC provides an excellent tool to probe the proton's sea quark distributions. At leading order $W^{-(+)}$ bosons are produced in $\bar{u}+d\,(\bar{d}+u)$ collisions, and parity-violating single-spin asymmetries measured in longitudinally polarized $p+p$ collisions give access to the flavor-separated light quark and antiquark helicity distributions. In this proceedings we report preliminary results for the single-spin asymmetry, $A_L$ from data collected in 2012 by the STAR experiment at RHIC with an integrated luminosity of 72 pb$^{-1}$ at $\sqrt{s}=510$ GeV and an average beam polarization of 56%.
description: Proceedings of the 3rd Workshop on the QCD Structure of the Nucleon (QCD-N' 2012)
Dijet asymmetry in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV within a multiphase transport model
Creators: name: Ma, Guo-Liang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Within a multi-phase transport (AMPT) model, dijet asymmetry is studied in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV. It is found that a large dijet asymmetry ($A_{J}$) is produced by strong interactions between jets and partonic matter. It is demonstrated that hadronization and final-state hadronic rescatterings have little effects on $A_{J}$. The final $A_{J}$ is found to be driven by both initial $A_{J}$ and partonic jet energy loss, which is consistent with an increasing jet energy loss in a hot and strongly interacting partonic medium in more central Pb+Pb collisions.
description: 6 pages, 7 figures (final published version)
Additional file 1 of Multiple diagnostic tests demonstrate an increased risk of canine heartworm disease in northern Queensland, Australia
Creators: name: Panetta, Jessica
                L.
name: Calvani, Nichola Eliza Davies
name: Orr, Bronwyn
name: Nicoletti, Aldo Gianfranco
name: Ward, Michael P.
name: Šlapeta, Jan
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1: Table S1. Summary of Dirofilaria immitis-positive diagnostics results for Queensland, Australia dogs from shelters.
A study of a laterally loaded thin circular cylindrical shell
Creators: name: Hayashi, Paul H.
Publisher: name: California Institute of Technology
Year: 1954
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: A new analysis of the stress distribution in a laterally-loaded, thin, circular, cylindrical shell is presented. It is shown that the mathematical analysis required is much simplified if the shell has zero shear strain and zero circumferential strain. With these hypotheses the stress distribution for an axial line load is calculated, and experimental measurements are made of the stresses in a shell with such a load. The computed and measured stresses agree with in the limits of experimental accuracy.

It is concluded that the proposed method of stress analysis will give satisfactory values for the stresses providing the ratio of length of cylinder to radius is sufficiently large and so long as there are no abrupt variations in load intensity.
Decay of turbulence behind three similar grids
Creators: name: Corrsin, Stanley
Publisher: name: California Institute of Technology
Year: 1942
Subjects: Aeronautics
Aeronautical Engineering

description: u’ and v’ decay measurements were made behind three similar girds.  The u’ readings were corrected for wire length and the v’ readings were corrected for the sensitivity of the v’-meter to u’.  These corrected values were plotted against x/M on logarithmic cross-section paper.  The slope of these lines gave the exponent in the theoretical law for the decay of isotropic turbulence.

A consistent deviation was found between the average u’ and v’ values.  A suitable length correction applied to the v’ values would increase them somewhat, lessening the discrepancy, and giving a true comparison between the two components of the turbulent energy.

From a comparison of the present u’ values behind the 1” grid with the u’ values measured with a free stream turbulence level 10 times as great as the present one, it is concluded that the change in initial turbulence has no appreciable effect on the u’ behind a grid.
The Auslander-Gorenstein property for Z-algebras
Creators: name: Gordon, I. G.
name: Stafford, J. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 14A22, 16A62, 16W70, 18G40, 20C08

description: We provide a framework for part of the homological theory of Z-algebras and their generalizations, directed towards analogues of the Auslander-Gorenstein condition and the associated double Ext spectral sequence that are useful for enveloping algebras of Lie algebras and related rings. As an application, we prove the equidimensionality of the characteristic variety of an irreducible representation of the Z-algebra, and for related representations over quantum symplectic resolutions. In the special case of Cherednik algebras of type A, this answers a question raised by the authors.
description: 31 pages
A Methodology for Studying Linguistic and Cultural Change in China, 1900-1950
Creators: name: Stewart, Spencer Dean
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper presents a quantitative approach to studying linguistic and cultural change in China during the first half of the twentieth century, a period that remains understudied in computational humanities research. The dramatic changes in Chinese language and culture during this time call for greater reflection on the tools and methods used for text analysis. This preliminary study offers a framework for analyzing Chinese texts from the late nineteenth and twentieth centuries, demonstrating how established methods such as word counts and word embeddings can provide new historical insights into the complex negotiations between Western modernity and Chinese cultural discourse.
description: 14 pages, 4 figures
Supplement for "A Personalized Cortical Atlas for Functional Regions of Interest"
Creators: name: Molloy, M. Fiona
name: Osher, David E.
Publisher: name: Zenodo
Year: 2023

description: This document contains Supplementary Table 1 and Supplementary Figure 1 for "A Personalized Cortical Atlas for Functional Regions of Interest" Molloy M.F. and Osher D.E. (under review)
Stimulated and Spontaneous Emission of Radiation in a Single Mode for N-TLMs
Creators: name: Tavis, Michael T.
name: Cummings, Frederick W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The general expressions for the time development of the ensemble averages of E^- and E^-E^+ are found for N two level molecules (TLMs) interacting with a single mode electromagnetic field. The TLMs are assumed to be at equivalent mode positions in the field. In the main body of the paper, the general results are then simplified by assuming that all TLMs are in the up state at time 0. Examples of spontaneous emission behavior including both Super Radiant behavior and emission suppression are shown in Appendix E while stimulated emission with all TLMs initially in the lower state is examined in Appendix F. Both resonant and non resonant cases are considered in the main body. Analytic results are presented for low numbers of TLMs. In the appendices, it will be shown that for the mean photon number large in comparison to the number of TLMs, that the Average Field Approximation (AFA) is a useful representation with much simpler analytic form. The validity of this approximation will also be examined. In the main paper, a comparison between the exact results and results using the AFA will be presented for a small number of TLMs and a large average photon number. It will be found that the results are in general remarkably similar but for non resonance differ somewhat at a finer level of detail. Of interest is that the ensemble averages for N TLMs is similar to the ensemble average for a single TLM multiplied by the number of TLMs which is somewhat disappointing but is believed to be the consequence of assuming that all TLMs are at equivalent mode positions and large mean photon number. Some results for smaller photon number will also be presented
description: 32 pages 9 figures
Nonequilibrium electron rings for synchrotron radiation production
Creators: name: Owen, Hywel
name: Williams, Peter H.
name: Stevenson, Scott
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Electron storage rings used for the production of synchrotron radiation (SR) have an output photon brightness that is limited by the equilibrium beam emittance. By using interleaved injection and ejection of bunches from a source with repetition rate greater than 1 kHz, we show that it is practicable to overcome this limit in rings of energy ~1 GeV. Sufficiently short kicker pulse lengths enable effective currents of many milliamperes, which can deliver a significant flux of diffraction-limited soft X-ray photons. Thus, either existing SR facilities may be adapted for non-equilibrium operation, or the technique applied to construct SR rings smaller than their storage ring equivalent.
description: 5 pages, 2 figures; accepted for publication in Physical Review Letters
Anatomy of $B \to K η^{(\prime)}$ decays in different mixing schemes and effects of next-to-leading order contributions in the perturbative QCD approach
Creators: name: Fan, Ying-Ying
name: Wang, Wen-Fei
name: Cheng, Shan
name: Xiao, Zhen-Jun
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we perform a comprehensive study of the four $B \to K \etap$ decays in the pQCD factorization approach. We calculate the CP-averaged branching ratios and CP-violating asymmetries of $B \to K\etap$ decays in the ordinary $η$-$\etar$, the $η$-$\etar$-$G$, and the $η$-$\etar$-$G$-$η_c$ mixing schemes. Besides the full LO contributions, all currently known NLO contributions to $B \to K \etap$ decays in the pQCD approach are taken into account. From our calculations and phenomenological analysis, we find the following. (a) The NLO contributions in general can provide significant enhancements to the LO pQCD predictions for the decay rates of the two $B \to K \etar$ decays, around $70%-89%$ in magnitude, but result in relatively small changes to $Br(B \to K η)$. (b) Although the NLO pQCD predictions in all three considered mixing schemes agree well with the data within one standard deviation, those pQCD predictions in the $η$-$\etar$-$G$ mixing scheme provide the best interpretation for the measured pattern of $Br(B \to K \etap)$: $Br(B^0 \to K^0 η) \approx 1.13\times 10^{-6}$, $Br(B^0 \to K^0 \etar) \approx 66.5 \times 10^{-6}$, $Br(B^\pm \to K^\pm η) \approx 2.36\times 10^{-6}$, and $Br(B^\pm \to K^\pm \etar) \approx 67.3 \times 10^{-6}$, which agree perfectly with the measured values. (c) The NLO pQCD predictions for the CP-violating asymmetries for the four considered decays are also in good consistent with the data. (d) The newly known NLO contribution to the relevant form factors $\calm_{FF}$ can produce about a 20% enhancement to the branching ratios $Br(B \to K \etar)$, which plays an important role in closing the gap between the pQCD predictions and the relevant data. (e) The general expectations about the relative strength of the LO and NLO contributions from different sources are examined and confirmed by explicit numerical calculations.
description: 42 pages, 5 ps figures
The Mid-Infrared and Near-Ultraviolet Excess Emissions of Quiescent Galaxies on the Red Sequence
Creators: name: Ko, Jongwan
name: Hwang, Ho Seong
name: Lee, Jong Chul
name: Sohn, Young-Jong
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the mid-infrared (IR) and near-ultraviolet (UV) excess emissions of spectroscopically selected quiescent galaxies on the optical red sequence. We use the Wide-field Infrared Survey Explorer ({\it WISE}) mid-IR and Galaxy Evolution Explorer ({\it GALEX}) near-UV data for a spectroscopic sample of galaxies in the Sloan Digital Sky Survey Data Release 7 to study the possible connection between quiescent red-sequence galaxies with and without mid-IR/near-UV excess. Among 648 12 $μ$m detected quiescent red-sequence galaxies without H$α$ emission, 26% and 55% show near-UV and mid-IR excess emissions, respectively. When we consider only bright ($M_{r}$ $
description: 9 figures, accepted for publication in ApJ
Alternative Scenarios of Relativistic Heavy-Ion Collisions: II. Particle Production
Creators: name: Ivanov, Yu. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Particle production in relativistic collisions of heavy nuclei is analyzed in a wide range of incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 62.4 GeV. The analysis is performed within the three-fluid model employing three different equations of state (EoS): a purely hadronic EoS, an EoS with the first-order phase transition and that with a smooth crossover transition. It is found that the hadronic scenario fails to reproduce experimental yields of antibaryons (strange and nonstrange), starting already from lower SPS energies, i.e. $\sqrt{s_{NN}}>$ 5 GeV. Moreover, at energies above the top SPS one, i.e. $\sqrt{s_{NN}}>$ 17.4 GeV, the mid-rapidity densities predicted by the hadronic scenario considerably exceed the available RHIC data on all species. At the same time the deconfinement-transition scenarios reasonably agree (to a various extent) with all the data. The present analysis demonstrates certain advantage of the deconfinement-transition EoS's. However, all scenarios fail to reproduce the strangeness enhancement in the incident energy range near 30A GeV (i.e. a horn anomaly in the $K^+/π^+$ ratio) and yields of $ϕ$-mesons at 20A--40A GeV.
description: 14 pages, 14 figures, version accepted to Phys. Rev. C
Bibliometric Analysis for the Expert Panel on the State of Industrial R&D in Canada 2011
Creators: name: Archambault, Éric
Publisher: name: Science-Metrix
Year: 2012
Subjects: technometrics
trade balance
high technology
0000-0002-4422-1054

description: The Canadian Industry presents a lackluster performance in high technology trade. The trade balance in high tech goods has been degrading significantly between 1990 and 2008. During those years, Canada maintained a negative trade balance in high tech goods on a fairly constant basis with Austria, Denmark, Sweden, Belgium, Finland and Switzerland and the overall portrait is one of degrading performance.
Hypersonic boundary layer flow around a sharp corner
Creators: name: Puhl, Andreas
Publisher: name: California Institute of Technology
Year: 1966
Subjects: Aeronautics

description: An experimental investigation was conducted in the GALCIT Mach 8 hypersonic wind tunnel, in order to study the behavior of an axisymmetric hypersonic, laminar boundary layer flow undergoing a rapid expansion at the juncture of a cone-cylinder body of revolution at zero angle of yaw. Major emphasis was placed on the acquisition of detailed data near the corner where extreme changes in the flow properties were expected. All tests were carried out for two different reservoir pressures but equal total temperature. The basic measurements consist of the model surface pressure and the pitot pressure covering the entire flow field of interest. These informations with certain assumptions were sufficient to construct the flow field.

The surface pressure distribution is in total disagreement with the potential theory from three boundary layer thicknesses upstream of the corner to about fifteen boundary layer thicknesses downstream. The expansion is not concentrated near the corner but extended over the above-mentioned region which is about one and a half cylinder radii long. The pressure immediately downstream of the corner is about seven-tenths of the pressure on the cone, in construct to the two-tenths as predicted by the potential theory.
Use of Résumé for Researchers (R4R)-like Narrative CV: High-level principles
Creators: name: Joint Funders Group
Publisher: name: Zenodo
Year: 2022
Subjects: Narrative CV
Résumé for Researchers
Principles

description: High-level principles for the use of Résumé for Researchers (R4R)-like CVs developed by the Joint Funders Group, in March 2022, designed to be used by many funders. Reminder this is under Creative Commons Attribution 4.0 Internal License. Please give credit to the Joint Funders Group.
description: Lead for resource development Joint Funders Group members, supported by Hilary Marshall.
Bibliometric Analysis for the Expert Panel on the State of Industrial R&D in Canada 2011
Creators: name: Archambault, Éric
Publisher: name: Science-Metrix
Year: 2011
Subjects: technometrics
trade balance
high technology

description: The Canadian Industry presents a lackluster performance in high technology trade. The trade balance in high tech goods has been degrading significantly between 1990 and 2008. During those years, Canada maintained a negative trade balance in high tech goods on a fairly constant basis with Austria, Denmark, Sweden, Belgium, Finland and Switzerland and the overall portrait is one of degrading performance.
Electromagnetic Duality in Dyonic RN/CFT Correspondence
Creators: name: Chen, Bin
name: Zhang, Jia-ju
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The area law of Bekenstein-Hawking entropy of the black hole suggests that the black hole should have a lower-dimensional holographic description. It has been found recently that such holographic pictures could be set up from the study of the thermodynamics of both outer and inner horizons for a large class of rotating and charged black holes. For a four-dimensional dyonic Reissner-Nordström black hole, its thermodynamics indicates that it has multiple holographic pictures not only the electric and magnetic ones corresponding to the conserved electric and magnetic charges carried by the black hole, but also the more generic ones generated by the $SL(2,Z)$ transformations. We show that this $SL(2,Z)$ group originates from the underlying electromagnetic duality symmetry in the Einstein-Maxwell theory. It turns out that the thermodynamics of the black hole not only encodes the information of holographic pictures; moreover it could reflect the symmetries of the underlying theory.
description: 5 pages, published version
Use of Résumé for Research and Innovation (R4RI)-like narrative CV: High-level principles
Creators: name: Joint Funders Group
name: Alternative Uses Group
Publisher: name: Zenodo
Year: 2023
Subjects: Narrative CV
Résumé for Researchers
Principles
Résumé for Research and Innovation
R4RI

description: Use of Résumé for Research and Innovation (R4RI)-like narrative CV: High-level principles. In March 2022, the Joint Funders Group developed the high-level principles for their use. In May 2023, the principles were updated and also adopted by the Alternative Uses Group. Reminder this is under Creative Commons Attribution 4.0 Internal License.
Additional file 1 of Gut micobiota alteration by Lactobacillus rhamnosus reduces pro-inflammatory cytokines and glucose level in the adult model of Zebrafish
Creators: name: Bootorabi, Fatemeh
name: Saadat, Farshid
name: Falak, Reza
name: Manouchehri, Hamed
name: Changizi, Reza
name: Mohammadi, Hasan
name: Safavifar, Farnaz
name: Khorramizadeh, Mohammad Reza
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1. Complementary information of animals, probiotic administration, histological staining and quantitative real-time polymerase chain reaction analysis.
An experimental investigation of high frequency combustion instability in a fuel-air combustor
Creators: name: Rogers, Don E
Publisher: name: California Institute of Technology
Year: 1954
Subjects: Aeronautics

description: The results of an experimental investigation of high frequency combustion instability in a fuel-air combustor are described. The phenomenon is described in terms of alterations in the flame geometry and pressure changes associated with the flow field. Quantitative measurements of the pressure fluctuations are presented and the effects of various system parameters on the instability are indicated.

A possible mechanism for forcing and sustaining the oscillations as indicated by the experimental data is suggested and discussed.
KICHIK MAKTAB YOSHI BOLALAR PSIXOLOGIYASI
Creators: name: Nomozov, Davronbek
Publisher: name: Zenodo
Year: 2024

description: Maqolada kichik maktab yoshidagi bolalarning psixologik xususiyatlarining rivojlanishi haqida ma’lumot beriladi, Jumladan maqolada kichik maktab yoshidagi bolalarning maktabga tayyorgarlik jarayonida sodir bo'ladigan psixologik o’zgarishlar, haqida ma’lumotlar yoritilgan.
Λ-enhanced Sub-Doppler Cooling of Lithium Atoms in D1 Gray Molasses
Creators: name: Grier, Andrew T.
name: Ferrier-Barbut, Igor
name: Rem, Benno S.
name: Delehaye, Marion
name: Khaykovich, Lev
name: Chevy, Frédéric
name: Salomon, Christophe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Following the bichromatic sub-Doppler cooling scheme on the D1 line of 40K recently demonstrated in (Fernandes et al. 2012), we introduce a similar technique for 7Li atoms and obtain temperatures of 60 uK while capturing all of the 5x10^8 atoms present from the previous stage. We investigate the influence of the detuning between the the two cooling frequencies and observe a threefold decrease of the temperature when the Raman condition is fulfilled. We interpret this effect as arising from extra cooling due to long-lived coherences between hyperfine states. Solving the optical Bloch equations for a simplified, Λ-type three-level system we identify the presence of an efficient cooling force near the Raman condition. After transfer into a quadrupole magnetic trap, we measure a phase space density of ~10^-5. This laser cooling offers a promising route for fast evaporation of lithium atoms to quantum degeneracy in optical or magnetic traps.
description: 8 pages, 8 figures; submitted to Phys. Rev. A; V2 contains edits in response to referee's comments
On the Construction of Radio Environment Maps for Cognitive Radio Networks
Creators: name: Wei, Zhiqing
name: Zhang, Qixun
name: Feng, Zhiyong
name: Li, Wei
name: Gulliver, T. Aaron
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The Radio Environment Map (REM) provides an effective approach to Dynamic Spectrum Access (DSA) in Cognitive Radio Networks (CRNs). Previous results on REM construction show that there exists a tradeoff between the number of measurements (sensors) and REM accuracy. In this paper, we analyze this tradeoff and determine that the REM error is a decreasing and convex function of the number of measurements (sensors). The concept of geographic entropy is introduced to quantify this relationship. And the influence of sensor deployment on REM accuracy is examined using information theory techniques. The results obtained in this paper are applicable not only for the REM, but also for wireless sensor network deployment.
description: 6 pages, 7 figures, IEEE WCNC conference
Protected boundary states in gapless topological phases
Creators: name: Matsuura, Shunji
name: Chang, Po-Yao
name: Schnyder, Andreas P.
name: Ryu, Shinsei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We systematically study gapless topological phases of (semi-)metals and nodal superconductors described by Bloch and Bogoliubov-de Gennes Hamiltonians. Using K-theory, a classification of topologically stable Fermi surfaces in (semi-)metals and nodal lines in superconductors is derived. We discuss a generalized bulk-boundary correspondence that relates the topological features of the Fermi surfaces and superconducting nodal lines to the presence of protected zero-energy states at the boundary of the system. Depending on the case, the boundary states are either linearly dispersing (i.e., Dirac or Majorana states) or are dispersionless, forming two-dimensional surface flat bands or one-dimensional arc surface states. We study examples of gapless topological phases in symmetry class AIII and DIII, focusing in particular on nodal superconductors, such as nodal non-centrosymmetric superconductors. For some cases we explicitly compute the surface spectrum and examine the signatures of the topological boundary states in the surface density of states.
description: 27 pages, 5 figures, published version
A likelihood based framework for assessing network evolution models tested on real network data
Creators: name: Clegg, R. G.
name: Landa, R.
name: Harder, U.
name: Rio, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This paper presents a statistically sound method for using likelihood to assess potential models of network evolution. The method is tested on data from five real networks. Data from the internet autonomous system network, from two photo sharing sites and from a co-authorship network are tested using this framework.
description: Presented at ACM/SIMPLEX '09 Workshop, ACM/SIMPLEX '09 Proceedings of the 1st Annual Workshop on Simplifying Complex Network for Practitioners 2009
Variation of burning velocity with pressure
Creators: name: Pardee, William McK.
Publisher: name: California Institute of Technology
Year: 1953
Subjects: Aeronautics

description: A review of some of the recent theories of steady state flame propagation in gaseous mixtures reveals a considerable difference in their prediction of the effect of pressure on burning velocity. Furthermore, the experimental data obtained by various workers in the field indicate widely different trends. In some cases burning velocity appears to be independent of pressure whereas in other cases it appears to increase as the pressure is reduced below atmospheric. Hence, as a possible aid in discovering more about the mechanism of flame propagation, the burning velocity of several gaseous mixtures was studied over the general pressure range from 100 to 700 mm Hg absolute.

The mixtures used were acetylene-oxygen, acetylene-air, acetylene-oxygen-nitrogen, ammonia-oxygen, ammonia-oxygen-nitrogen, carbon monoxide-oxygen, carbon monoxide-air, and propane-air. Using the burner-visual cone-area method with burners of various sizes, the following results were obtained: for all the above mixtures, except propane-air, the burning velocity is independent of pressure; for propane-air mixtures, the burning velocity varies as P[superscript -.13]. These results are valid provided the burner size is large enough to nullify the effect of quenching.

It is concluded that these results definitely do not support the Tanford and Pease theory that burning velocity varies as P[superscript -.25].
One-dimensional transport of interacting particles: Currents, density profiles, phase diagrams and symmetries
Creators: name: Dierl, Marcel
name: Einax, Mario
name: Maass, Philipp
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Driven lattice gases serve as canonical models for investigating collective transport phenomena and properties of non-equilibrium steady states (NESS). Here we study one-dimensional transport with nearest-neighbor interactions both in closed bulk systems and in open channels coupled to two particle reservoirs at the ends of the channel. For the widely employed Glauber rates we derive an exact current-density relation in the bulk for unidirectional hopping. An approach based on time-dependent density functional theory provides a good description of the kinetics. For open systems, the system-reservoir couplings are shown to have a striking influence on boundary-induced phase diagrams. The role of particle-hole symmetry is discussed and its consequence on the topology of the phase diagrams. It is furthermore demonstrated that systems with weak bias can be mapped onto systems with unidirectional hopping.
description: 12 pages, 7 figures
Liquid Phase adsorption kinetics and equilibrium of toluene by novel modified-diatomite
Creators: name: Khalighi, Reza
Publisher: name: figshare
Year: 2022
Subjects: Environmental biotechnology diagnostics (incl. biosensors)
Environmental biotechnology not elsewhere classified
Environmental marine biotechnology
Pollution and contamination not elsewhere classified
Environmental biogeochemistry
Surface water quality processes and contaminated sediment assessment

description: The adsorption equilibria of toluene from aqueous solutions on natural and modified diatomite were examined at different operation parameters such as pH, contact time, initial toluene concentration was evaluated and optimum experimental conditions were identified. The surface area and morphology of the nanoparticles were characterized by SEM, BET, XRD, FTIR and EDX analysis. It was found that in order to obtain the highest possible removal of toluene, the experiments can be carried out at pH 6, temperature 25°C, an agitation speed of 200 rpm, an initial toluene concentration of 150 mg/L, a centrifugal rate of 4000 rpm, adsorbent dosage = 0.1 g and a process time of 90 min. The results of this work show that the maximum percentage removal of toluene from aqueous solution in the optimum conditions for NONMD was 96.91% (145.36 mg/g). Furthermore, under same conditions, the maximum adsorption of natural diatomite was 71.45% (107.18 mg/g). Both adsorption kinetic and isotherm experiments were carried out. The experimental data showed that the adsorption follows the Langmuir model and Freundlich model on natural and modified diatomite respectively. The kinetics results were found to conform well to pseudo-second order kinetics model with good correlation. Thus, this study demonstrated that the modified diatomite could be used as potential adsorbent for removal of toluene from aqueous solution.
Model on pulsed GeV radiation from magnetars
Creators: name: Takata, J.
name: Wang, Y.
name: Wu, E. M. H.
name: Cheng, K. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We discuss a possible scenario for radiation mechanism of pulsed GeV gamma-rays from magnetars. The magnetars have shown frequent X-ray bursts, which would be triggered by crust fractures and could release the energy of order of ~10^{41-42}erg. If the location of the crust cracking of the magnetic field is close to the magnetic pole, part of the released energy may excite the Alfevn wave that can propagate into outer magnetosphere. The oscillation of the magnetic field induces the available potential drop ~10^{15}Volts, which can accelerate the electrons and/or positrons to the Lorentz factor ~10^{7} in the outer magnetosphere. The curvature radiation process at outer magnetosphere can produce GeV gamma-rays. If the radiation process is occurred above r~5x 10^7cm from the stellar surface, the emitted GeV gamma-rays can escape from the pair-creation process with the X-rays and/or the magnetic field. The expected luminosity of the GeV emissions is order of L_γ< 10^{35} erg/s, and the radiation process will last for a temporal scale of years. The expected pulse profiles have a broad shape with sometimes sharp peaks. We apply the model to AXP 1E~2259+586.
description: 22 pages, 6 figures, accepted to MNRAS
Thiosilanes as thioketalization reagents
Creators: name: Nesbitt, Stephen L.
Publisher: name: California Institute of Technology
Year: 1977
Subjects: Chemistry

description: Thiosilanes react efficiently with simple aldehydes and ketones when catalyzed with ZnI_2 to produce thioacetals and thioketals. Steroidal diketones were thioketalized with yields and selectivity superior to other methods when allowed to react with thiosilanes and ZnI_2.

The overall thioketalization process proceeds through silyl-hemithioketal intermediates which can be detected and isolated from the reaction mixtures. The isolated silylhemithioketals can be resubmitted to the thioketalization reaction conditions and be converted to thioketals.
Additional file 2 of Gut micobiota alteration by Lactobacillus rhamnosus reduces pro-inflammatory cytokines and glucose level in the adult model of Zebrafish
Creators: name: Bootorabi, Fatemeh
name: Saadat, Farshid
name: Falak, Reza
name: Manouchehri, Hamed
name: Changizi, Reza
name: Mohammadi, Hasan
name: Safavifar, Farnaz
name: Khorramizadeh, Mohammad Reza
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 2: Table S1. Primer sequences used for amplification of specific genes through real-time quantitative PCR.
The theory, construction, and field use of a direct current potentiometer for measuring earth resistivity
Creators: name: Doolittle, Russell Carter
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The fundamental theory underlying direct current
methods of measuring "apparent" earth resistivity and
of interpreting these field measurements to obtain
the actual resistivities of the parts of a composite
earth is extensively reviewed. The three main types
of apparatus used in making the field measurements,
the Gish-Rooney, "Megger", and "porous pot" instruments,
are briefly outlined.  Considerations involved in making
a general design for a "porous pot" outfit are briefly
discussed, and a detailed description of the apparatus
used by the writer is given. Field data obtained with
this apparatus is interpreted by the several methods
discussed in the literature.
An Optimized Photon Pair Source for Quantum Circuits
Creators: name: Harder, Georg
name: Ansari, Vahid
name: Brecht, Benjamin
name: Dirmeier, Thomas
name: Marquardt, Christoph
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We implement an ultrafast pulsed type-II parametric down conversion source in a periodically poled KTP waveguide at telecommunication wavelengths with almost identical properties between signal and idler. As such, our source resembles closely a pure, genuine single mode photon pair source with indistinguishable modes. We measure the joint spectral intensity distribution and second order correlation functions of the marginal beams and find with both methods very low effective mode numbers corresponding to a Schmidt number below 1.16. We further demonstrate the indistinguishability as well as the purity of signal and idler photons by Hong-Ou-Mandel interferences between signal and idler and between signal/idler and a coherent field, respectively. Without using narrowband spectral filtering, we achieve a visibility for the interference between signal and idler of 94.8% and determine a purity of more than 80% for the heralded single photon states. Moreover, we measure raw heralding efficiencies of 20.5% and 15.5% for the signal and idler beams corresponding to detector-loss corrected values of 80% and 70%.
description: 11 pages, 8 figures
A wind tunnel investigation of the aerodynamic characteristics of high-lift devices on supersonic wings at low subsonic speed
Creators: name: Blenkush, P. G.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: An investigation was made to determine the effects of various full- and partial-span high-lift devices on the lift, drag, and pitching moment characteristics of a straight wing and a highly sweptforward wing, both having an aspect ratio of 1.72 and a thin double wedge symmetrical airfoil section. Split, extended leading edge, and extended trailing edge flaps were tested at various deflection angles on each wing alone and also on wing-fuselage combinations. In addition, plain leading edge flaps extending over a portion of the outboard span were tested on the sweptforward wing. Tuft surveys were made on typical model configurations to determine the change in stall pattern due to variation in the angle of attack.

From the results of the tests it was found that a given flap configuration produced approximately equal increments of maximum lift on the sweptforward wing alone and on the same wing combined with a fuselage. Comparison of the results obtained with the straight wing showed that the maximum lift increments were lower for a given flap used on wing plus fuselage than those obtained with the same flap on the basic straight wing. When considered from the maximum lift standpoint, the extended trailing edge flap was superior to either split or extended leading edge flap. Reduced span flaps were not as effective on the sweptforward wing, as the comparable full span flap. In the case of the straight wing alone, reduced span split and extended trailing edge flaps produced higher maximum lifts than did the corresponding full span configuration. This effect was also observed with the split flap tests on the straight wing combined with the fuselage.

The experimental work was performed in the Cal Tech-Merrill wind tunnel located on the Pasadena City College campus.
Additional file 3 of Gut micobiota alteration by Lactobacillus rhamnosus reduces pro-inflammatory cytokines and glucose level in the adult model of Zebrafish
Creators: name: Bootorabi, Fatemeh
name: Saadat, Farshid
name: Falak, Reza
name: Manouchehri, Hamed
name: Changizi, Reza
name: Mohammadi, Hasan
name: Safavifar, Farnaz
name: Khorramizadeh, Mohammad Reza
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 3: Table S2. Summary of the effects of probiotic supplementation on length, weight gain and BMI of experimental groups.
Lifetime of the Bose Gas with Resonant Interactions
Creators: name: Rem, B. S.
name: Grier, A. T.
name: Ferrier-Barbut, I.
name: Eismann, U.
name: Langen, T.
name: Navon, N.
name: Khaykovich, L.
name: Werner, F.
name: Petrov, D. S.
name: Chevy, F.
name: Salomon, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the lifetime of a Bose gas at and around unitarity using a Feshbach resonance in lithium~7. At unitarity, we measure the temperature dependence of the three-body decay coefficient $L_{3}$. Our data follow a $L_3 {=} λ_{3} / T^{2}$ law with $λ_{3} = 2.5(3)_{stat}_(6)_{sys} 10^{-20} (μK)^2 cm^6 s^{-1}$ and are in good agreement with our analytical result based on the zero-range theory. Varying the scattering length $a$ at fixed temperature, we investigate the crossover between the finite-temperature unitary region and the previously studied regime where $|a|$ is smaller than the thermal wavelength. We find that $L_{3}$ is continuous across resonance, and over the whole $a {
Effects of Nickel Aluminate Spinel (NiAl2O4) as Catalyst Support and Promoters (Ru, Rh) in Fischer-Tropsch Synthesis
Creators: name: Khalighi, Reza
Publisher: name: figshare
Year: 2022
Subjects: Carbon capture engineering (excl. sequestration)
Chemical and thermal processes in energy and combustion
Chemical engineering design
Chemical engineering not elsewhere classified
Electrochemical energy storage and conversion
Powder and particle technology
Process control and simulation
Reaction engineering (excl. nuclear reactions)
Separation technologies

description: The novel NiAl2O4 spinel was used as support to synthesis cobalt catalysts and investigated for Fischer-Tropsch synthesis. The physicochemical properties of the synthesized catalysts (Co/NiAl2O4, Co/Rh/NiAl2O4, Co/Ru/NiAl2O4 and Co/γ-Al2O3) were characterized by XRD, BET, ICP, SEM, FESEM, HRTEM, TPR and TGA analysis before reaction. It was shown the use of novel NiAl2O4 support that was prepared by a modified sol-gel process had a good dispersion. Besides that, Nickel aluminate decreased the interaction of Co and support and resulting in a significant increase in the reduction degree and the catalytic activity. The catalyst of 15Co/0.5Rh/NiAl2O4 shows the highest catalytic activity. It is worth noting that the NiAl2O4 support decreased the CH4 selectivity but enhanced the C5+ selectivity and catalytic stability.
Measurements of aerodynamic noise on a flat plate in supersonic flow
Creators: name: Chen, William S.
Publisher: name: California Institute of Technology
Year: 1961
Subjects: Aeronautics

description: NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

Measurements of aerodynamic noise, in the form of pressure fluctuations in a turbulent boundary layer, were made on a smooth flat plate in the 12- and 20-in. supersonic wind tunnels at the Jet Propulsion Laboratory.  The noise was measured with small piezoelectric pressure transducers (0.015-0.03 in. diameter) constructed of barium titanate crystals which were flush-mounted in the flat plate.

Spectral-energy distributions of the pressure fluctuations are obtained up to a frequency of 0.5 mc at freestream Mach numbers from 2.0 to 5.0, and Reynolds numbers based an bound layer-displacement thickness from 5 x 10(3) to 5 x 10(4). By grouping the test variables into the proper nondimensional forms and correcting for the finite transducer size, the energy spectra are found to be similar and uniquely related to both Mach number and Reynolds number.  The total, or integrated, level of noise at the plate surface, in terms of root-mean-square values of the pressure fluctuations, is a constant equal to about 10 times the shear stress [...] the wall. The intensity, [...], is directly proportional to the fourth power of the freestream Mach number.

Correlation measurements in time and in the streamwise direction in space show that the noise at the plate surface to convected downstream with a characteristic velocity equal to 75% of the freestream velocity. The correlation dies off rapidly with spacing between pickup points, and the convection velocity shows no dependence on either Mach number or Reynolds number.
The partition of amplitudes for an SV-wave by Zoeppritz's method
Creators: name: Silgado, Enrique Ferro
Publisher: name: California Institute of Technology
Year: 1944
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Our problem is to find the amplitude ratios under specific boundary conditions. First, let us deduce the relations between the different amplitudes in the usual manner (Macelwane 1.). We are dealing with plane waves in isotropic media and the boundary surface between both media is a plane. The energy of the incident wave is partitioned among the generated waves.