cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lorentz invariance violation and charge (non--)conservation: A general theoretical frame for extensions of the Maxwell equations
Creators: name: Laemmerzahl, Claus
name: Macias, Alfredo
name: Mueller, Holger
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: All quantum gravity approaches lead to small modifications in the standard laws of physics which lead to violations of Lorentz invariance. One particular example is the extended standard model (SME). Here, a general phenomenological approach for extensions of the Maxwell equations is presented which turns out to be more general than the SME and which covers charge non--conservation (CNC), too. The new Lorentz invariance violating terms cannot be probed by optical experiments but need, instead, the exploration of the electromagnetic field created by a point charge or a magnetic dipole. Some scalar--tensor theories and higher dimensional brane theories predict CNC in four dimensions and some models violating Special Relativity have been shown to be connected with CNC and its relation to the Einstein Equivalence Principle has been discussed. Due to this upcoming interest, the experimental status of electric charge conservation is reviewed. Up to now there seem to exist no unique tests of charge conservation. CNC is related to the precession of polarization, to a modification of the $1/r$--Coulomb potential, and to a time-dependence of the fine structure constant. This gives the opportunity to describe a dedicated search for CNC.
description: To appear in Physical Review D
YIELD RESPONSE IN PAKISTAN AGRICULTURE: A COINTEGRATION APPROACH
Creators: name: Mushtaq, Khalid
name: Dawson, P.J.
name: Mushtaq, Khalid
name: Dawson, P.J.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: Pakistan
subject: supply response
subject: wheat
subject: cotton
subject: cointegration.

description: We seek to quantify and evaluate the supply (yield) response of wheat and cotton in Pakistan using cointegration analysis and annual data for 1960-96. The results reveal that wheat supply is significantly influenced by the prices of wheat, cotton, and fertilizer, the percentage area under high yielding wheat varieties, and the rabi season (winter) water availability. The cotton supply is found to be significantly influenced by the real cotton price, the real fertilizer price, and in the irrigated area. The wheat supply was found to be inelastic both in the short- and long-run. However, cotton supply was elastic in the long-run.
Additional file 2 of Prevalence of non-communicable diseases and its risk factors among Ijegun-Isheri Osun residents in Lagos State, Nigeria: a community based cross-sectional study
Creators: name: Idris, Israel Oluwaseyidayo
name: Oguntade, Ayodipupo Sikiru
name: Ekow Adom Mensah
name: Kitamura, Noriko
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 2. Supplementary analyses. Supplementary Table and Figures.
Ginsparg-Wilson Pions Scattering in a Sea of Staggered Quarks
Creators: name: Chen, Jiunn-Wei
name: O'Connell, Donal
name: Van de Water, Ruth S.
name: Walker-Loud, Andre
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate isospin 2 pion-pion scattering in chiral perturbation theory for a partially quenched, mixed action theory with Ginsparg-Wilson valence quarks and staggered sea quarks. We point out that for some scattering channels, the power-law volume dependence of two pion states in nonunitary theories such as partially quenched or mixed action QCD is identical to that of QCD. Thus one can extract infinite volume scattering parameters from mixed action simulations. We then determine the scattering length for both 2 and 2+1 sea quarks in the isospin limit. The scattering length, when expressed in terms of the pion mass and the decay constant measured on the lattice, has no contributions from mixed valence-sea mesons, thus it does not depend upon the parameter, C_Mix, that appears in the chiral Lagrangian of the mixed theory. In addition, the contributions which nominally arise from operators appearing in the mixed action O(a^2 m_q) Lagrangian exactly cancel when the scattering length is written in this form. This is in contrast to the scattering length expressed in terms of the bare parameters of the chiral Lagrangian, which explicitly exhibits all the sicknesses and lattice spacing dependence allowed by a partially quenched mixed action theory. These results hold for both 2 and 2+1 flavors of sea quarks.
description: 27 pages, 3 figures. Mistakes corrected in Eqs. (37), (42). Improved discussion in section 4 and related results in Eqs. (33), (37), (40) and (42). Added references. Version to be published in PRD
Sodium Bose-Einstein Condensates in an Optical Lattice
Creators: name: Xu, K.
name: Liu, Y.
name: Abo-Shaeer, J. R.
name: Mukaiyama, T.
name: Chin, J. K.
name: Miller, D. E.
name: Ketterle, W.
name: Jones, Kevin M.
name: Tiesinga, Eite
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The phase transition from a superfluid to a Mott insulator has been observed in a $^{23}$Na Bose-Einstein condensate. A dye laser detuned $\approx 5$nm red of the Na $3^2$S$ \to 3^2$P$_{1/2}$ transition was used to form the three dimensional optical lattice. The heating effects of the small detuning as well as the three-body decay processes constrained the timescale of the experiment. Certain lattice detunings were found to induce a large loss of atoms. These loss features were shown to be due to photoassociation of atoms to vibrational levels in the Na$_2$ $(1) ^3Σ_g^+$ state.
description: Figures somewhat compromised due to size reduction
A Systematic Identification of Formal and Semi-formalLanguages and Techniques for Software-intensiveSystems-of-Systems Requirements Modeling
Creators: name: Lana, Cristiane Aparecida
name: Guessi, Milena
name: Antonino, Pablo Oliveira
name: Rombach, Dieter
name: NakagawaA, Elisa Yumi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Software-intensive Systems-of-Systems (SoS) refer to an arrangement of managerially and operationally independent systems(i.e., constituent systems), which work collaboratively towards the achievement of global missions. Because some SoS are developed for critical domains, such as healthcare and transportation, there is an increasing need to attain higher quality levels, which often justifies additional costs that can be incurred by adopting formal and semi-formal approaches (i.e., languages and techniques) for modeling requirements. Various approaches have been employed, but a detailed landscape is still missing, and it is not well known whether they are appropriate for addressing the inherent characteristics of SoS. The main contribution of this article is to present this landscape by reporting on the state of the art in SoS requirements modeling. This landscape was built by means of a systematic mapping and shows formal and semi-formal approaches grouped from model-based to property-oriented ones. Most of them have been tested in safety-critical domains, where formal approaches such as finite state machines are aimed at critical system parts, while semi-formal approaches (e.g., UML and i*) address non-critical parts. Although formal and semi-formal modeling is an essential activity, the quality of SoS requirements does not rely solely on which formalism is used, but also on the availability of supporting tools/mechanisms that enable, for instance, requirements verification along the SoS lifecycle
LABOR MARKET LIBERALIZATION, EMPLOYMENT AND GENDER IN RURAL CHINA
Creators: name: Zhang, Linxiu
name: De Brauw, Alan
name: Rozelle, Scott
name: Zhang, Linxiu
name: De Brauw, Alan
name: Rozelle, Scott
Publisher: name: Unknown
Year: 2003
Subjects: subject: Labor and Human Capital
subject: China
subject: labor market liberalization
subject: employment
subject: wages
subject: gender

description: The major objective of this paper is to discuss the development of rural labor markets in China during the past two decades and understand how it has affected women. Using household survey data that we collected in 2001, we examine the role of women in labor markets by examining employment and migration trends and changes in wages. According to the data of our nearly national representative sample, we find that there has been a sharp overall increase in off-farm participation, most of the increase has been driven by young migrants, and women, especially those in the youngest cohorts, have participated at rates equaling or surpassing those of their male counterparts. We also find that the wages of women have not been adversely affected by the emergence of liberalized labor markets and that when women, mostly middle-aged and older ones, are left in charge of farm work, the productivity of crop production does not fall.
Growth of high quality large area MgB2 thin films by reactive evaporation
Creators: name: Moeckly, Brian H.
name: Ruby, Ward S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a new in-situ reactive deposition thin film growth technique for the production of MgB2 thin films which offers several advantages over all existing methods and is the first deposition method to enable the production of high-quality MgB2 films for real-world applications. We have used this growth method, which incorporates a rotating pocket heater, to deposit MgB2 films on a variety of substrates, including single-crystalline, polycrystalline, metallic, and semiconductor materials up to 4" in diameter. This technique allows growth of double-sided, large-area films in the intermediate temperature range of 400 to 600 degrees C. These films are clean, well-connected, and consistently display Tc values of 38 to 39 K with low resistivity and residual resistivity values. They are also robust and uncommonly stable upon exposure to atmosphere and water.
description: Submitted to Superconductor Science and Technology
Interlinked Credit and Farm Intensification: Evidence from Kenya
Creators: name: Jayne, Thomas S.
name: Yamano, Takashi
name: Nyoro, James K.
name: Jayne, Thomas S.
name: Yamano, Takashi
name: Nyoro, James K.
Publisher: name: Unknown
Year: 2003
Subjects: Agricultural Finance

description: This paper addresses the potential for interlinked credit/input/output marketing arrangements for cash crops to promote food crop intensification. Using panel survey data from Kenya, we estimate a household fixed-effects model of fertilizer use per hectare of food crops. Results indicate that households engaging in interlinked marketing programs for selected cash crops applied considerably more fertilizer on other crops (primarily cereals) not directly purchased by the cash crop trading firm. These findings suggest that, in addition to the direct stimulus that interlinked cash crop marketing arrangements can have on small farmer incomes, these institutional arrangements may provide spillover benefits for the productivity of farmers' other activities such as food cropping.
Max-Min Lyapunov Functions for Switched Systems and Related Differential Inclusions
Creators: name: Della Rossa, Matteo
name: Tanwani, Aneel
name: Zaccarian, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Starting from a finite family of continuously differentiable positive definite functions, we study conditions under which a function obtained by max-min combinations is a Lyapunov function, establishing stability for two kinds of nonlinear dynamical systems: a) Differential inclusions where the set-valued right-hand-side comprises the convex hull of a finite number of vector fields, and b) Autonomous switched systems with a state-dependent switching signal. We investigate generalized notions of directional derivatives for these max-min functions, and use them in deriving stability conditions with various degrees of conservatism, where more conservative conditions are numerically more tractable. The proposed constructions also provide nonconvex Lyapunov functions, which are shown to be useful for systems with state-dependent switching that do not admit a convex Lyapunov function. Several examples are included to illustrate the results.
description: To appear in Automatica
Quark-Hadron Duality in Structure Functions
Creators: name: Fantoni, A.
name: Bianchi, N.
name: Liuti, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quark-hadron duality is studied in a systematic way for both the unpolarized and polarized structure functions, by taking into account all the available data in the resonance region.In both cases, a detailed perturbative QCD based analysis of the structure functions integrals in the resonance region is performed: non perturbative contributions are disentangled, and higher twist terms are evaluated. A different behavior between the unpolarized and polarized structure functions at low Q^2 is found.
description: 5 pages, 4 figures
Additional file 2 of COVID-19 pandemic preparation: using simulation for systems-based learning to prepare the largest healthcare workforce and system in Canada
Creators: name: Dubé, Mirette
name: Alyshah Kaba
name: Cronin, Theresa
name: Barnes, Sue
name: Fuselli, Tara
name: Grant, Vincent
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 2:. Walkthrough process simulation
Additional file 1 of Prevalence of non-communicable diseases and its risk factors among Ijegun-Isheri Osun residents in Lagos State, Nigeria: a community based cross-sectional study
Creators: name: Idris, Israel Oluwaseyidayo
name: Oguntade, Ayodipupo Sikiru
name: Ekow Adom Mensah
name: Kitamura, Noriko
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 1. Data collection instrument. NAIJAHEALTH survey interviewer administered questionnaire.
Continuum Singularities of a Mean Field Theory of Collisions
Creators: name: Giraud, B. G.
name: Weiguny, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Consider a complex energy $z$ for a $N$-particle Hamiltonian $H$ and let $χ$ be any wave packet accounting for any channel flux. The time independent mean field (TIMF) approximation of the inhomogeneous, linear equation $(z-H)|Ψ>=|χ>$ consists in replacing $Ψ$ by a product or Slater determinant $ϕ$ of single particle states $ϕ_i.$ This results, under the Schwinger variational principle, into self consistent TIMF equations $(η_i-h_i)|ϕ_i>=|χ_i>$ in single particle space. The method is a generalization of the Hartree-Fock (HF) replacement of the $N$-body homogeneous linear equation $(E-H)|Ψ>=0$ by single particle HF diagonalizations $(e_i-h_i)|ϕ_i>=0.$ We show how, despite strong nonlinearities in this mean field method, threshold singularities of the {\it inhomogeneous} TIMF equations are linked to solutions of the {\it homogeneous} HF equations.
description: 21 pages, 14 figures
65. Hot Jupiters and star clustering
Creators: name: Perryman, Michael
Publisher: name: Zenodo
Year: 2022

description: Amongst exoplanets known today are the perplexing class of `hot Jupiters', gas giants orbiting close to their host star. What brought them to such bizarre orbits?  Gaia shows that their existence correlates with  ancient star clusters, and with other waves and ripples of star densities in space and space motion in our Galaxy.
Search for light dark matter with NEWS-G
Creators: name: Nikolopoulos, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The NEWS-G collaboration is searching for light dark matter candidates using a spherical proportional counter. Light gases, such as hydrogen, helium, and neon, are used as targets, providing access in the 0.1-10 GeV mass range. First results obtained with SEDINE, a 60 cm in diameter detector, in the Underground Laboratory of Modane yielded a 90% confidence level upper limit of 4.4x 10^{37} cm^2 on the nucleon-dark matter interaction cross-section for a candidate with 0.5 GeV mass. Recent developments in several aspects of the detector instrumentation are presented, along with the construction of a new, 140 cm in diameter, detector with new compact shielding.
description: 10 pages, 10 figures, 15th Topical Seminar on Innovative Particle and Radiation Detectors, 14-17 October 2019, Siena, Italy
The optical afterglow of the short gamma-ray burst GRB 050709
Creators: name: Hjorth, Jens
name: Watson, Darach
name: Fynbo, Johan P. U.
name: Price, Paul A.
name: Jensen, Brian L.
name: Jørgensen, Uffe G.
name: Kubas, Daniel
name: Gorosabel, Javier
name: Jakobsson, Páll
name: Sollerman, Jesper
name: Pedersen, Kristian
name: Kouveliotou, Chryssa
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It has long been known that there are two classes of gamma-ray bursts (GRBs), mainly distinguished by their durations. The breakthrough in our understanding of long-duration GRBs (those lasting more than ~2 s), which ultimately linked them with energetic Type Ic supernovae, came from the discovery of their long-lived X-ray and optical afterglows, when precise and rapid localizations of the sources could finally be obtained. X-ray localizations have recently become available for short (duration <2 s) GRBs, which have evaded optical detection for more than 30 years. Here we report the first discovery of transient optical emission (R-band magnitude ~23) associated with a short burst; GRB 050709. The optical afterglow was localized with subarcsecond accuracy, and lies in the outskirts of a blue dwarf galaxy. The optical and X-ray afterglow properties 34 h after the GRB are reminiscent of the afterglows of long GRBs, which are attributable to synchrotron emission from ultrarelativistic ejecta. We did not, however, detect a supernova, as found in most nearby long GRB afterglows, which suggests a different origin for the short GRBs.
description: 11 pages, 3 figures, press material at http://www.astro.ku.dk/dark/
Effects of self-consistency violation in Hartree-Fock RPA calculations for nuclear giant resonances revisited
Creators: name: Sil, Tapas
name: Shlomo, S.
name: Agrawal, B. K.
name: Reinhard, P. -G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We provide accurate assessments of the consequences of violations of self-consistency in Hartree-Fock (HF) based random phase approximation (RPA) calculations of the centroid energy $E_{cen}$ of isoscalar and isovector giant resonances of multi-polarities $L=0-3$ in a wide range of nuclei. This is done by carrying out highly accurate HF-RPA calculations neglecting the particle-hole (ph) spin-orbit or Coulomb interaction in the RPA and comparing with the fully self-consistent HF-RPA results. We find that the shifts in the value of $E_{cen}$ due to self-consistency violation associated with the spin-orbit and Coulomb interactions are comparable or larger than the current experimental errors in $E_{cen}$.
description: 17 pages, 2 figures, to appear in Phys. Rev. C
Further Results about Field Theory on the World Sheet and String Formation
Creators: name: Bardakci, Korkut
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The present article is the continuation of the earlier work, which used the world sheet representation and the mean field approximation to sum planar graphs in massless phi^3 field theory. We improve on the previous work in two respects: A prefactor in the world sheet propagator that had been neglected is now taken into account. In addition, we introduce a non-zero bare mass for the field phi. Working with a theory with cutoff, and using the mean field approximation, we find that, depending on the range of values of the mass and coupling constant, the model has two phases: A string forming phase and a perturbative field theory phase. We also find the generation of a new degree of freedom, which was not in the model originally. The new degree of freedom can be thought of as the string slope, which is now promoted into a fluctuating dynamical variable. Finally, we show that the introduction of the bare mass makes it possible to renormalize the model.
description: 39 pages, 10 figures, typos corrected and one equation simplified
Environments of dwarf galaxies with optical AGN characteristics
Creators: name: Kristensen, Mikkel T.
name: Pimbblet, Kevin
name: Penny, Samantha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This study aims to explore the relation between dwarf galaxies ($M_* \leq 5\times10^9 M_\odot$) with AGNs and their environment by comparing neighbourhood parameters of AGN and non-AGN samples. Using the NASA-Sloan Atlas, both the local environment and the immediate environment of dwarf galaxies with $z \leq 0.055$ are analysed. Of the 145,155 galaxies in the catalogue, 62,258 of them are classified as dwarf galaxies, and by employing two AGN selection methods based on emission line fluxes (BPT and WHAN), 4,476 are found to have AGN characteristics in their optical spectra. Regardless of selection method, this study finds no discernible differences in environment between AGN and non-AGN host dwarf galaxies and these results indicate that environment is not an important factor in triggering AGN activity in dwarf galaxies. This is in line with existing literature on environments of regular galaxies with AGNs and suggests universality in terms of reaction to environment across the mass regime. The biases of AGN selection in low-mass galaxies, and the biases of different measures of environment are also considered. It is found that there are several mass-trends in emission line ratios and that the SDSS fiber covers galaxies non-uniformly with redshift. These biases should be accounted for in future work by possibly including other wavelength regimes or mass-weighting of emission line ratios. Lastly, a discussion of the environment estimation methods is included since they may not gauge the desired properties due to factors such as time delay or using loosely constrained proxy parameters.
description: 15 pages, 14 figures. Accepted for publication in MNRAS
RETAIL BUYERS' EXPECTATIONS CONCERNING THE GROWTH OF VALUE-ADDED PRODUCE AND PERCEPTIONS OF THE IMPORTANCE OF PROMOTIONAL VEHICLES USED TO SELL VALUE-ADDED PRODUCE
Creators: name: Wolf, Marianne McGarry
name: Wolf, Marianne McGarry
Publisher: name: Unknown
Year: 1999
Subjects: Consumer/Household Economics

description: The research was conducted through the use of a telephone survey of produce retail buyers during a two-year period, May 1996 through May 1998. This research shows that retail buyers expect value-added produce sales to continue to increase and that they rate promotional vehicles, related to pricing, as important factors in increasing their willingness to carry a value-added produce product. Branding is somewhat important in increasing their willingness to carry a value-added produce product.
SUPPLY CHAIN MANAGEMENT IN THE FRESH PRODUCE INDUSTRY: A MILE TO GO?
Creators: name: Zuurbier, Peter J.P.
name: Zuurbier, Peter J.P.
Publisher: name: Unknown
Year: 1999
Subjects: Agribusiness

description: We investigate the factors that influence vertical coordination in the fresh produce industry. Elaborating on the concept of governance structure, price and non-price coordination systems will be distinguished. Under previous research, there is a specific consideration as to how market conditions and institutional considerations influence the coordination of supply chains. In my presentation for the Food Distribution Research Society in Monterey, California, I analyzed how retail companies in the United States, France, and the Netherlands coordinate their supply chains of fruits and vegetables. Differences in product category and institutional environments do not contribute directly to the explanation of differences found in supply chain coordination systems. Industry-specific factors and firm-resource-based factors may supply a better understanding of these differences.
Virial masses and the baryon fraction in galaxies
Creators: name: Hoekstra, H.
name: Hsieh, B. C.
name: Yee, H. K. C.
name: Lin, H.
name: Gladders, M. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the weak lensing signal as a function of restframe luminosity for a sample of `isolated' galaxies. These results are based on four-band photometry from the Red-Sequence Cluster Survey, enabling us to determine photometric redshifts for a large number of galaxies. We select a secure sample of lenses with photometric redshifts 0.2
description: 13 pages, accepted for publication in the ApJ
Inhomogeneous loop models with open boundaries
Creators: name: Di Francesco, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the crossing and non-crossing O(1) dense loop models on a semi-infinite strip, with inhomogeneities (spectral parameters) that preserve the integrability. We compute the components of the ground state vector and obtain a closed expression for their sum, in the form of Pfaffian and determinantal formulas.
description: 42 pages, 31 figures, minor corrections, references corrected
On the long-term stability of space-time crystals
Creators: name: Smits, J.
name: Stoof, H. T. C.
name: van der Straten, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate a space-time crystal in a superfluid Bose gas. Using a well-controlled periodic drive we excite only one crystalline mode in the system, which can be accurately modeled in the rotating frame of the drive. Using holographic imaging we observe the stability of the crystal over an extended period of time and show the robustness of its structure in both space and time. By introducing a fourth-order term in the Hamiltonian we show that the crystal stabilizes at a fixed number of quanta. The results of the model are compared to the experimental data and show good agreement, with a small number of free parameters. The results yield insights in the long-term stability of the crystal, which can only be obtained by the combination of the extended control in the experiment and the nearly ab-initio character of the model. From the model we derive a phase diagram of the system, which can be exploited in the future to study the phase transitions for this new state of matter in even more detail.
description: Submitted to the Focus on Time Crystals issue of New Journal of Physics
Ökumenische Arbeit in der Tschechoslowakei
Creators: name: Hromádka, Josef Lukl
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 7 Nr. 2 (1958): Ökumenische Rundschau, Band 7, Heft 2
Additional file 1 of COVID-19 pandemic preparation: using simulation for systems-based learning to prepare the largest healthcare workforce and system in Canada
Creators: name: Dubé, Mirette
name: Alyshah Kaba
name: Cronin, Theresa
name: Barnes, Sue
name: Fuselli, Tara
name: Grant, Vincent
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1:. eSIM COVID simulation requests: Questions to guide needs of end user
Electron Positron Capture Rates and the Steady State Equilibrium Condition for Electron-Positron Plasma with Nucleons
Creators: name: Yuan, Ye-Fei
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The reaction rates of the beta processes for all particles at arbitrary degeneracy are derived, and an {\it analytic} steady state equilibrium condition $μ_n=μ_p+2μ_e$ which results from the equality of electron and positron capture rates in the hot electron-positron plasma with nucleons is also found, if the matter is transparent to neutrinos. This simple analytic formula is valid only if electrons are nondegenerate or mildly degenerate, which is generally satisfied in the hot electron-positron plasma. Therefore, it can be used to efficiently determine the steady state of the hot matter with plenty of positrons. Based on this analytic condition, given the baryon number density and the temperature, if the nucleons are nondegenerate, only one algebraic equation for determining the electron fraction is obtained, which shows the great advantage of the analytic equilibrium condition.
description: Accepted for publication in Phys. Rev. D
Measurement of intracellular cytokines by flow cytometry in normal and immunodeprived subjects
Creators: name: Wu, Vivian Fung Fei
Publisher: name: University of British Columbia
Year: 2009

description: Cytokines are polypeptide protein hormones which are transiently produced by cells of the immune system and act as both autocrine and paracrine mediators to modulate the growth, activation, differentiation and proliferation of target cells. They play an important immuno-regulatory role in normal health, and their production is substantially disturbed in disorders such as transplantation and acquired immunodeficiency. This study has examined the use of flow cytometry as a rapid, sensitive and clinically relevant method to measure the intracellular production of IL-2 and IFNƴ, key cytokines in the human immune response. PBMC were activated with PMA and ionomycin in the presence of monensin. Fluorochrome conjugated monoclonal antibodies were used to define the intracellular cytokine and surface phenotype. In normal controls IL-2 and IFNƴ were expressed in 34% and 26% of T cells respectively after 5 hours of stimulation. IL-2 and IFNƴ expression did not differ between patients on hemo- and peritoneal dialysis (IL-2: 40% and 26%, IFNƴ: 22% and 29%>) nor with normal controls. Expression of IL-2 was significantly reduced in stable renal transplant patients receiving immunosuppressive pharmacological agents ( p<0.001). The expression of IFNƴ was similar to normal controls after 5 hours of stimulation, the fluorescence of IFNy was reduced (p<0.05). The proportion of IL-2 and IFNy in CD3+ T cells was found to vary with each individual immuno compromised renal transplant patient in an elapsed period of 6 months . In HIV positive patients, IFNƴ expression was similar to normal controls but the fluorescence of IFNƴ was significantly reduced (p<0.001). The expression of IL-2 was also significantly reduced (p<0.001); although differential expression in CD4+ and CD8+ T cells parallelled that in normal controls. The measurement of intracellular IL-2 and IFNƴ by flow cytometry is a novel, adaptable in vitro method for quantification of the immune competence of cells in a heterogeneous population.
MPEC 2024-T247 : 2024 TE10
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TE10

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Environmentally friendly method of silicon recycling: synthesis of silica nanoparticles in an aqueous solution
Creators: name: Bondareva, J. V.
name: Aslyamov, T. F.
name: Kvashnin, A. G.
name: Dyakonov, P. V.
name: Kuzminova, Y. O.
name: Mankelevich, Yu. A.
name: Voronina, E. N.
name: Dagesyan, S. A.
name: Egorov, A. V.
name: Khmelnitsky, R. A.
name: Tarkhov, M. A.
name: Suetin, N. V.
name: Akhatov, I. S.
name: Evlashin, S. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Future decades will experience tons of silicon waste from various sources, with no reliable recycling route. The transformation of bulk silicon into SiO2 nanoparticles is environmentally significant because it provides a way to recycle residual silicon waste. To address the needs of silicon recycling, we develop a top-down approach that achieves 100% conversion of bulk silicon to silica nanoparticles with outcome sizes of 8-50 nm. In addition to upcycling the potential of silica, our method also possesses several advantages, such as simplicity, scalability and controllable particle size distribution. Many fields of science and manufacturing, such as optics, photonics, medical, and mechanical applications, require size-controllable fabrication of silica nanoparticles. We demonstrate that control over temperature and hydrolysis time has a significant impact on the average particle size and distribution shape. Additionally, we unravel the process of nanoparticle formation using a theoretical nucleation model and quantum density functional theory calculations. Our results provide a theoretical and experimental basis for silica nanoparticle fabrication and pave the way for further silicon conservation research.
description: 33 pages, 13 figures
Electronic structure and spectroscopy of the quaternary Heusler alloy Co$_2$Cr$_{1-x}$Fe$_{x}$Al
Creators: name: Wurmehl, Sabine
name: Fecher, Gerhard H.
name: Kroth, Kristian
name: Kronast, Florian
name: Dürr, Hermann A.
name: Takeda, Yukiharu
name: Saitoh, Yuji
name: Kobayashi, Keisuke
name: Lin, Hong-Ji
name: Schönhense, Gerd
name: Felser, Claudia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Quaternary Heusler alloys Co$_2$Cr$_{1-x}$Fe$_{x}$Al with varying Cr to Fe ratio $x$ were investigated experimentally and theoretically. The electronic structure and spectroscopic properties were calculated using the full relativistic Korringa-Kohn-Rostocker method with coherent potential approximation to account for the random distribution of Cr and Fe atoms as well as random disorder. Magnetic effects are included by the use of spin dependent potentials in the local spin density approximation. Magnetic circular dichroism in X-ray absorption was measured at the $L_{2,3}$ edges of Co, Fe, and Cr of the pure compounds and the $x=0.4$ alloy in order to determine element specific magnetic moments. Calculations and measurements show an increase of the magnetic moments with increasing iron content. Resonant (560eV - 800eV) soft X-ray as well as high resolution - high energy ($\geq 3.5$keV) hard X-ray photo emission was used to probe the density of the occupied states in Co$_2$Cr$_{0.6}$Fe$_{0.4}$Al.
description: J.Phys.D_Appl.Phys. accepted
Shell-model phenomenology of low-momentum interactions
Creators: name: Schwenk, A.
name: Zuker, A. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The first detailed comparison of the low-momentum interaction V_{low k} with G matrices is presented. We use overlaps to measure quantitatively the similarity of shell-model matrix elements for different cutoffs and oscillator frequencies. Over a wide range, all sets of V_{low k} matrix elements can be approximately obtained from a universal set by a simple scaling. In an oscillator mean-field approach, V_{low k} reproduces satisfactorily many features of the single-particle and single-hole spectra on closed-shell nuclei, in particular through remarkably good splittings between spin-orbit partners on top of harmonic oscillator closures. The main deficiencies of pure two-nucleon interactions are associated with binding energies and with the failure to ensure magicity for the extruder-intruder closures. Here, calculations including three-nucleon interactions are most needed. V_{low k} makes it possible to define directly a meaningful unperturbed monopole Hamiltonian, for which the inclusion of three-nucleon forces is tractable.
description: 5 pages, 4 figures, minor additions, to appear as Rapid Comm. in Phys. Rev. C
Real-time modelling of Optical orientation in GaAs: generation and decay of the degree of spin polarization
Creators: name: D'Alessandro, Marco
name: Sangalli, Davide
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a real-time abinitio description of optical orientation in bulk GaAs due to the coupling with an ultrashort circular polarized laser source. The injection of spin polarized electrons in the conduction band is correctly reproduced, and a non vanishing spin polarization ($\mathbf{P}$) parallel to the direction of propagation of the laser ($z$) emerges. A detailed analysis of the generation and the evolution of $\mathbf{P}(t)$ is discussed. The single $\mathbf{k}$-point dynamics is a motion of precession around a fixed axis with constant $|\mathbf{P}|$ and fixed frequency. Instead, the $\mathbf{k}$-integrated signal shows only a time dependent $P_z(t)$ and decays few pico seconds after the end of the laser pump due to decoherence. Decoherence emerges since the individual contributions activated by the pump give rise to destructive interference. We interpret the results in terms of the \emph{free induction decay} mechanism proposed some years ago. For the first time we are able to reproduce such effect in a full abinitio fashion, giving a quantitative estimate of the associated decay time. Our result also shows a possible explanation to the time decay of spin magnetization observed in many real-time abinitio simulations.
description: 6 pages, 6 figures
Ball possession and passes as key performance indicators in the Algerian league of soccer (LFP1).
Creators: name: Abderrahmen, Hadji
name: Abdelmalik, Bachir Benosmane
Publisher: name: Zenodo
Year: 2022
Subjects: PERFORMANCE INDICATORS, POSSESSION, PASS, DARTFISH, SOCCER, ALGERIA

description: THE AIM OF THE PRESENT STUDY IS TO IDENTIFY IF BALL POSSESSION AND PASS ARE KEY PERFORMANCE INDICATORS IN THE ALGERIAN LEAGUE OF SOCCER. 64 GAMES PLAYED IN THE ALGERIAN “LIGUE DE FOOTBALL PROFESSIONNEL 1 (LFP1) “FROM THE 2015/16 SEASON WERE ANALYZED. ATTRIBUTE OF BALL POSSESSION AND PASS ANALYZED ARE: BALL POSSESSION: SEQUENCE BY BALL TOUCH, SEQUENCE BY TIME, OVERALL TIME AND POSSESSION PERCENTAGE; PASS: OVERALL NUMBER AND SUCCESSFUL (%), BY PITCH AREA, BY PLAYING POSITION. GAMES WERE ANALYZED BY THE DARTFISH SOFTWARE. RESULTS SHOWED THAT NEITHER OVERALL PASS AND POSSESSION (ABSOLUTE AND RELATIVE) ARE RELATED TO SUCCESS. HOWEVER, WE FOUND THAT DEFEATED TEAMS TEND TO RECORD MORE SEQUENCE WITH «7-10" TOUCHES (8.5±5.12 VS 7,09 ± 4,23 AND 5.1 ± 3.21 FOR WON AND DRAW GAMES ; P<0.05) AND MORE SUCCESSFUL PASSES (%) (P<0.05).FORWARDS TEND TO ACHIEVE MORE PASSES IN WON GAMES COMPARE TO DRAW AND LOST ONES (P=0.59; 0.06 RESPECTIVELY). DISTRIBUTION OF PASS ON THE FIELD WAS DIFFERENT IN DRAW GAMES PITCH AREA
Fractional quantum Hall effect on the two-sphere: a matrix model proposal
Creators: name: Morariu, Bogdan
name: Polychronakos, Alexios P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a Chern-Simons matrix model describing the fractional quantum Hall effect on the two-sphere. We demonstrate the equivalence of our proposal to particular restrictions of the Calogero-Sutherland model, reproduce the quantum states and filling fraction and show the compatibility of our result with the Haldane spherical wavefunctions.
description: 26 pages, LaTeX, no figures, references added
Additional file 1 of Detection of subclinical skin manifestation in patients with psoriasis and psoriatic arthritis by fluorescence optical imaging
Creators: name: A. Schmidt
name: A. M. Glimm
name: I. K. Haugen
name: P. Hoff
name: G. Schmittat
name: G. R. Burmester
name: J. Klotsche
name: S. Ohrndorf
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer

description: Additional file 1: Figure S1. Flow-Chart: Patient recruitment. Figure S2. Subdermal skin enhancement read in “Temperature mode”. Table S1. Current medication. Table S2. Cardiovascular risk factors.
DRAWING THE PROFILE OF EFFICIENT FOOD INDUSTRIES-VERTICAL INTEGRATION, ECONOMIES OF SCALE, AND LOCATION ADVANTAGES IN THE DISTRIBUTION OF PRODUCTS: A CASE STUDY FROM THE GREEK FOOD INDUSTRY
Creators: name: Kaltsas, Ioannis K.
name: Beamer, Bobby G.
name: Kaltsas, Ioannis K.
name: Beamer, Bobby G.
Publisher: name: Unknown
Year: 1999
Subjects: Agribusiness

description: A stochastic frontier production function that incorporates a model for technical inefficiency effects is used to investigate the industrial production of Greek food industries. Panel data comes from 29 Greek firms in 1988 through 1992. Parameters considered in the model for inefficiency effects include the degree of vertical integration, capital intensity, location, and time. A translog stochastic frontier function is estimated simultaneously with those variables in the model for inefficiency effects. The results indicate that technical efficiency among the firms ranges from 42 percent to 99 percent. More efficient firms are those with a higher degree of vertical integration that are located in rural areas and have sufficient investment in human capital to exploit the economies of scale obtained through investment in fixed capital. Most firms improve their performance over time, reducing the efficiency gap.
MARKETING WINTER VEGETABLES FROM MEXICO
Creators: name: Calvin, Linda
name: Barrios, Veronica
name: Calvin, Linda
name: Barrios, Veronica
Publisher: name: Unknown
Year: 1999
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The North American winter-vegetable industry is highly integrated, with Mexican production supplying a large part of U.S. winter consumption needs. Imports from Mexico undergo a rigorous inspection procedure before entering the United States. In addition to Mexican firms, many U.S. firms are also involved in sourcing winter vegetables from Mexico. To compete well, both U.S. and Mexican firms must adapt to the changing market pressures, which reward firms that can source from many locations to provide a year-round supply and vertically integrated or coordinated firms that can control quality and pursue aggressive marketing.
Reduction and Unfolding for Quantum Systems: the Hydrogen Atom
Creators: name: D'Avanzo, A.
name: Marmo, G.
name: Valentino, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we propose a ``quantum reduction procedure'' based on the reduction of algebras of differential operators on a manifold. We use these techniques to show, in a systematic way, how to relate the hydrogen atom to a family of quantum harmonic oscillators, by the means of the Kustaahneimo-Stiefel fibration.
description: 22 pages, Latex 2e, typos corrected
A TARGET CONSUMER PROFILE AND POSITIONING FOR PROMOTION OF VALUE-ADDED SALAD PRODUCTS: A CASE STUDY
Creators: name: Wolf, Marianne McGarry
name: Wolf, Marianne McGarry
Publisher: name: Unknown
Year: 1999
Subjects: subject: Consumer/Household Economics
subject: Marketing
subject: FOS: Economics and business

description: A consumer survey was used to generate a demographic profile of the target market for value-added produce products compared to consumers who purchase bulk produce products. Those who purchase value-added produce products are more likely to be young, single, and without children than are those who do not purchase value-added produce products. The produce characteristics that are most desirable to consumers when making their purchase decision were identified. The extremely to very desirable characteristics of produce are those that concern taste, quality, and value. The very to somewhat desirable characteristics of produce are those that relate to the convenience of using and buying produce. Consumers' perceptions of the characteristics of packaged salad products versus head lettuce were evaluated. The characteristics of produce that provide packaged salad with a relative advantage over head lettuce were identified for use in a promotional campaign by producers of packaged salad products.
THE IMPACT OF CHANGING CONSUMER PREFERENCES ON BABY FOOD CONSUMPTION
Creators: name: Harris, James Michael
name: Harris, James Michael
Publisher: name: Unknown
Year: 1999
Subjects: Consumer/Household Economics
Food Consumption/Nutrition/Food Safety

description: This study examines the relationship between processed baby food consumption, socioeconomic factors, and attitudes and awareness concerning baby food safety and nutrition. The results are consistent with the view that recent concerns about safety may have negatively impacted consumption. Several socioeconomic factors were also found to be significant in explaining consumption.